tor-commits October 2012

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[tor/master] Conform to existing Doxygen style
by andrea＠torproject.org 10 Oct '12

10 Oct '12

commit 6391f963fb1ff9988d048397cd054b65ff5a52ff Author: Andrea Shepard <andrea(a)torproject.org> Date: Mon Oct 8 21:30:07 2012 -0700 Conform to existing Doxygen style --- src/or/channel.c | 265 +++----------------------------------------------- src/or/channeltls.c | 98 +------------------ 2 files changed, 18 insertions(+), 345 deletions(-) diff --git a/src/or/channel.c b/src/or/channel.c index fac4017..57b9e4f 100644 --- a/src/or/channel.c +++ b/src/or/channel.c @@ -97,9 +97,6 @@ channel_write_cell_queue_entry(channel_t *chan, cell_queue_entry_t *q); /** * Indicate whether a given channel state is valid - * - * @param state A channel state - * @return A boolean value indicating whether state is a valid channel state */ int @@ -131,10 +128,6 @@ channel_state_is_valid(channel_state_t state) * This function takes two channel states and indicates whether a * transition between them is permitted (see the state definitions and * transition table in or.h at the channel_state_t typedef). - * - * @param from Proposed state to transition from - * @param to Proposed state to transition to - * @return A boolean value indicating whether the posposed transition is valid */ int @@ -183,9 +176,6 @@ channel_state_can_transition(channel_state_t from, channel_state_t to) /** * Return a human-readable description for a channel state - * - * @param state A channel state - * @return A pointer to a string with a human-readable description of state */ const char * @@ -232,8 +222,6 @@ channel_state_to_string(channel_state_t state) * * This function registers a newly created channel in the global lists/maps * of active channels. - * - * @param chan A pointer to an unregistered channel */ void @@ -306,8 +294,6 @@ channel_register(channel_t *chan) * * This function removes a channel from the global lists and maps and is used * when freeing a closed/errored channel. - * - * @param chan A pointer to a channel to be unregistered */ void @@ -363,8 +349,6 @@ channel_unregister(channel_t *chan) * This function adds a channel to the digest map and inserts it into the * correct linked list if channels with that remote endpoint identity digest * already exist. - * - * @param chan A pointer to a channel to add */ static void @@ -416,8 +400,6 @@ channel_add_to_digest_map(channel_t *chan) * * This function removes a channel from the digest map and the linked list of * channels for that digest if more than one exists. - * - * @param chan A pointer to a channel to remove */ static void @@ -563,10 +545,6 @@ channel_remove_from_digest_map(channel_t *chan) * This function searches for a channel by the global_identifier assigned * at initialization time. This identifier is unique for the lifetime of the * Tor process. - * - * @param global_identifier The global_identifier value to search for - * @return A pointer to the channel with that global identifier, or NULL if - * none exists. */ channel_t * @@ -593,9 +571,6 @@ channel_find_by_global_id(uint64_t global_identifier) * the channel digest map. It's possible that more than one channel to a * given endpoint exists. Use channel_next_with_digest() and * channel_prev_with_digest() to walk the list. - * - * @param identity_digest A digest to search for - * @return A channel pointer, or NULL if no channel to this endpoint exists. */ channel_t * @@ -614,14 +589,10 @@ channel_find_by_remote_digest(const char *identity_digest) } /** - * Next channel with digest + * Get next channel with digest * * This function takes a channel and finds the next channel in the list * with the same digest. - * - * @param chan Channel pointer to iterate - * @return A pointer to the next channel after chan with the same remote - * endpoint identity digest, or NULL if none exists. */ channel_t * @@ -634,14 +605,10 @@ channel_next_with_digest(channel_t *chan) } /** - * Previous channel with digest + * Get previous channel with digest * * This function takes a channel and finds the previos channel in the list * with the same digest. - * - * @param chan Channel pointer to iterate - * @return A pointer to the previous channel after chan with the same remote - * endpoint identity digest, or NULL if none exists. */ channel_t * @@ -659,13 +626,11 @@ channel_prev_with_digest(channel_t *chan) } /** - * Internal-only channel init function for cell channels + * Initialize a cell channel * * This function should be called by subclasses to set up some per-channel * variables. I.e., this is the superclass constructor. Before this, the * channel should be allocated with tor_malloc_zero(). - * - * @param chan Pointer to a channel to initialize. */ void @@ -690,13 +655,11 @@ channel_init_for_cells(channel_t *chan) } /** - * Internal-only channel init function for listener channels + * Initialize a listener channel * * This function should be called by subclasses to set up some per-channel * variables. I.e., this is the superclass constructor. Before this, the * channel should be allocated with tor_malloc_zero(). - * - * @param chan Pointer to a channel to initialize. */ void @@ -715,12 +678,8 @@ channel_init_listener(channel_t *chan) } /** - * Internal-only channel free function - * - * Nothing outside of channel.c should call this; it frees channels after - * they have closed and been unregistered. - * - * @param chan Channel to free + * Free a channel; nothing outside of channel.c and subclasses should call + * this - it frees channels after they have closed and been unregistered. */ void @@ -752,10 +711,9 @@ channel_free(channel_t *chan) } /** - * Internal-only forcible channel free function - * - * This is like channel_free, but doesn't do the state/registration asserts; - * it should only be used from channel_free_all() when shutting down. + * Free a channel and skip the state/reigstration asserts; this internal- + * use-only function should be called only from channel_free_all() when + * shutting down the Tor process. */ static void @@ -821,9 +779,6 @@ channel_force_free(channel_t *chan) * * This function returns a function pointer to the current registered * handler for new incoming channels on a listener channel. - * - * @param chan Channel to get listener for - * @return Function pointer to an incoming channel handler */ channel_listener_fn_ptr @@ -843,9 +798,6 @@ channel_get_listener_fn(channel_t *chan) * * This function sets the handler for new incoming channels on a listener * channel. - * - * @param chan Listener channel to set handler on - * @param listener Function pointer to new incoming channel handler */ void @@ -869,9 +821,6 @@ channel_set_listener_fn(channel_t *chan, * * This function gets the handler for incoming fixed-length cells installed * on a channel. - * - * @param chan Channel to get the fixed-length cell handler for - * @return A function pointer to chan's fixed-length cell handler, if any. */ channel_cell_handler_fn_ptr @@ -893,9 +842,6 @@ channel_get_cell_handler(channel_t *chan) * * This function gets the handler for incoming variable-length cells * installed on a channel. - * - * @param chan Channel to get the variable-length cell handler for - * @return A function pointer to chan's variable-length cell handler, if any. */ channel_var_cell_handler_fn_ptr @@ -918,11 +864,6 @@ channel_get_var_cell_handler(channel_t *chan) * This function sets both the fixed-length and variable length cell handlers * for a channel and processes any incoming cells that had been blocked in the * queue because none were available. - * - * @param chan Channel to set the fixed-length cell handler for - * @param cell_handler Function pointer to new fixed-length cell handler - * @param var_cell_handler Function pointer to new variable-length cell - handler */ void @@ -965,13 +906,11 @@ channel_set_cell_handlers(channel_t *chan, } /** - * Mark a channel to be closed + * Mark a channel for closure * * This function tries to close a channel_t; it will go into the CLOSING * state, and eventually the lower layer should put it into the CLOSED or * ERROR state. Then, channel_run_cleanup() will eventually free it. - * - * @param chan Channel to close */ void @@ -1012,8 +951,6 @@ channel_mark_for_close(channel_t *chan) * Notify the channel code that the channel is being closed due to a non-error * condition in the lower layer. This does not call the close() method, since * the lower layer already knows. - * - * @param chan Channel to notify for close */ void @@ -1043,8 +980,6 @@ channel_close_from_lower_layer(channel_t *chan) * This function is called by the lower layer implementing the transport * when a channel must be closed due to an error condition. This does not * call the channel's close method, since the lower layer already knows. - * - * @param chan Channel to notify for error */ void @@ -1074,8 +1009,6 @@ channel_close_for_error(channel_t *chan) * This function should be called by the lower layer when a channel * is finished closing and it should be regarded as inactive and * freed by the channel code. - * - * @param chan Channel to notify closure on */ void @@ -1110,8 +1043,6 @@ channel_closed(channel_t *chan) * * This function clears the identity digest of the remote endpoint for a * channel; this is intended for use by the lower layer. - * - * @param chan Channel to clear */ void @@ -1147,9 +1078,6 @@ channel_clear_identity_digest(channel_t *chan) * * This function sets the identity digest of the remote endpoint for a * channel; this is intended for use by the lower layer. - * - * @param chan Channel to clear - * @param identity_digest New identity digest for chan */ void @@ -1208,8 +1136,6 @@ channel_set_identity_digest(channel_t *chan, * * This function clears all the remote end info from a channel; this is * intended for use by the lower layer. - * - * @param chan Channel to clear */ void @@ -1246,10 +1172,6 @@ channel_clear_remote_end(channel_t *chan) * * This function sets new remote end info on a channel; this is intended * for use by the lower layer. - * - * @chan Channel to set data on - * @chan identity_digest New identity digest for chan - * @chan nickname New remote nickname for chan */ void @@ -1340,6 +1262,8 @@ cell_queue_entry_is_padding(cell_queue_entry_t *q) } /** + * Write to a channel based on a cell_queue_entry_t + * * Given a cell_queue_entry_t filled out by the caller, try to send the cell * and queue it if we can't. */ @@ -1502,9 +1426,6 @@ channel_write_var_cell(channel_t *chan, var_cell_t *var_cell) * This internal and subclass use only function is used to change channel * state, performing all transition validity checks and whatever actions * are appropriate to the state transition in question. - * - * @param chan Channel to change state on - * @param to_state State to change chan to */ void @@ -1653,10 +1574,6 @@ channel_change_state(channel_t *chan, channel_state_t to_state) * it will try to write up to num_cells cells from the channel's cell queue or * from circuits active on that channel, or as many as it has available if * num_cells == -1. - * - * @param chan Channel to flush from - * @param num_cells Maximum number of cells to flush, or -1 for unlimited - * @return Number of cells flushed */ #define MAX_CELLS_TO_GET_FROM_CIRCUITS_FOR_UNLIMITED 256 @@ -1701,14 +1618,10 @@ channel_flush_some_cells(channel_t *chan, ssize_t num_cells) } /** - * Flush cells from just the channel's out going cell queue + * Flush cells from just the channel's outgoing cell queue * * This gets called from channel_flush_some_cells() above to flush cells * just from the queue without trying for active_circuits. - * - * @param chan Channel to flush from - * @param num_cells Maximum number of cells to flush, or -1 for unlimited - * @return Number of cells flushed */ static ssize_t @@ -1841,13 +1754,11 @@ channel_flush_some_cells_from_outgoing_queue(channel_t *chan, } /** - * Try to flush as many cells as we possibly can from the queue + * Flush as many cells as we possibly can from the queue * * This tries to flush as many cells from the queue as the lower layer * will take. It just calls channel_flush_some_cells_from_outgoing_queue() * in unlimited mode. - * - * @param chan Channel to flush */ void @@ -1861,9 +1772,6 @@ channel_flush_cells(channel_t *chan) * * This gets used from the lower layer to check if any more cells are * available. - * - * @param chan Channel to check on - * @return 1 if cells are available, 0 otherwise */ int @@ -1888,8 +1796,6 @@ channel_more_to_flush(channel_t *chan) * * Connection.c will call this when we've flushed the output; there's some * dirreq-related maintenance to do. - * - * @param chan Channel to notify */ void @@ -1909,8 +1815,6 @@ channel_notify_flushed(channel_t *chan) * * Use a listener's registered callback to process as many entries in the * queue of incoming channels as possible. - * - * @param listener Pointer to a listening channel. */ void @@ -1965,8 +1869,6 @@ channel_process_incoming(channel_t *listener) * until there is positive confirmation that the network is operational. * In particular, anything UDP-based should not make this transition until a * packet is received from the other side. - * - * @param chan Channel that has become open */ void @@ -2016,9 +1918,6 @@ channel_do_open_actions(channel_t *chan) * Internal and subclass use only function to queue an incoming channel from * a listening one. A subclass of channel_t should call this when a new * incoming channel is created. - * - * @param listener Listening channel to queue on - * @param incoming New incoming channel */ void @@ -2079,8 +1978,6 @@ channel_queue_incoming(channel_t *listener, channel_t *incoming) * * Process as many queued cells as we can from the incoming * cell queue. - * - * @param chan Channel to process incoming cell queue on */ void @@ -2150,9 +2047,6 @@ channel_process_cells(channel_t *chan) * * This should be called by a channel_t subclass to queue an incoming fixed- * length cell for processing, and process it if possible. - * - * @param chan Channel the cell is arriving on - * @param cell Incoming cell to queue and process */ void @@ -2212,9 +2106,6 @@ channel_queue_cell(channel_t *chan, cell_t *cell) * * This should be called by a channel_t subclass to queue an incoming * variable-length cell for processing, and process it if possible. - * - * @param chan Channel the cell is arriving on - * @param var_cell Incoming cell to queue and process */ void @@ -2275,11 +2166,6 @@ channel_queue_var_cell(channel_t *chan, var_cell_t *var_cell) * Write a destroy cell with circ ID circ_id and reason reason * onto channel chan. Don't perform range-checking on reason: * we may want to propagate reasons from other cells. - * - * @param circ_id Circuit ID to destroy - * @param chan Channel to send on - * @param reason Reason code - * @return Always 0 */ int @@ -2302,7 +2188,7 @@ channel_send_destroy(circid_t circ_id, channel_t *chan, int reason) } /** - * Channel statistics + * Dump channel statistics to the log * * This is called from dumpstats() in main.c and spams the log with * statistics on channels. @@ -2337,7 +2223,7 @@ channel_dumpstats(int severity) } /** - * Channel cleanup + * Clean up channels * * This gets called periodically from run_scheduled_events() in main.c; * it cleans up after closed channels. @@ -2487,11 +2373,6 @@ channel_free_all(void) * or make a new type including a tor_addr_t and port, so we have a * single abstract object encapsulating all the protocol details of * how to contact an OR. - * - * @param addr Address of remote node to establish a channel to - * @param port ORport of remote OR - * @param id_digest Identity digest of remote OR - * @return New channel, or NULL if failure */ channel_t * @@ -2510,12 +2391,6 @@ channel_connect(const tor_addr_t *addr, uint16_t port, * number of circuits and the age are used as tie-breakers. * * This is based on the former connection_or_is_better() of connection_or.c - * - * @param now Current time to use for deciding grace period for new channels - * @param a Channel A for comparison - * @param b Channel B for comparison - * @param forgive_new_connections Whether to use grace period for new channels - * @return 1 iff a is better than b */ int @@ -2576,13 +2451,6 @@ channel_is_better(time_t now, channel_t *a, channel_t *b, * channel, set *msg_out to a message describing the channel's state * and our next action, and set *launch_out to a boolean indicated whether * the caller should try to launch a new channel with channel_connect(). - * - * @param digest Endpoint digest we want - * @param target_addr Endpoint address we want - * @param msg_out Write out status message here if we fail - * @param launch_out Write 1 here if caller should try to connect a new - * channel. - * @return Pointer to selected channel, or NULL if none available */ channel_t * @@ -2869,7 +2737,6 @@ channel_dump_statistics(channel_t *chan, int severity) (chan->u.cell_chan.active_circuit_pqueue != NULL) ? smartlist_len(chan->u.cell_chan.active_circuit_pqueue) : 0, chan->u.cell_chan.n_circuits); - /* TODO better circuit info once circuit structure refactor is finished */ /* Describe timestamps */ log(severity, LD_GENERAL, @@ -2963,9 +2830,6 @@ channel_dump_transport_statistics(channel_t *chan, int severity) * This function return a test provided by the lower layer of the remote * endpoint for this channel; it should specify the actual address connected * to/from. - * - * @param chan Channel to describe - * @return Pointer to string description */ const char * @@ -2985,9 +2849,6 @@ channel_get_actual_remote_descr(channel_t *chan) * This function return a test provided by the lower layer of the remote * endpoint for this channel; it should use the known canonical address for * this OR's identity digest if possible. - * - * @param chan Channel to describe - * @return Pointer to string description */ const char * @@ -3006,10 +2867,6 @@ channel_get_canonical_remote_descr(channel_t *chan) * * Write the remote address out to a tor_addr_t if the underlying transport * supports this operation. - * - * @param chan Channel to request remote address from - * @param addr_out Write the address out here - * @return 1 if successful, 0 if not */ int @@ -3030,9 +2887,6 @@ channel_get_addr_if_possible(channel_t *chan, tor_addr_t *addr_out) * * Indicate if either we have queued cells, or if not, whether the underlying * lower-layer transport thinks it has an output queue. - * - * @param chan Channel to query - * @return 1 if there are queued writes, 0 otherwise */ int @@ -3060,9 +2914,6 @@ channel_has_queued_writes(channel_t *chan) * * This function returns the is_bad_for_new_circs flag of the specified * channel. - * - * @param chan Channel to get flag on - * @return Flag value */ int @@ -3078,8 +2929,6 @@ channel_is_bad_for_new_circs(channel_t *chan) * Mark a channel as bad for new circuits * * Set the is_bad_for_new_circs_flag on chan. - * - * @param chan Channel to mark */ void @@ -3097,9 +2946,6 @@ channel_mark_bad_for_new_circs(channel_t *chan) * This returns the client flag of a channel, which will be set if * command_process_create_cell() in command.c thinks this is a connection * from a client. - * - * @param chan Channel to query flag - * @return Flag value */ int @@ -3115,8 +2961,6 @@ channel_is_client(channel_t *chan) * Set the client flag * * Mark a channel as being from a client - * - * @param chan Channel to mark */ void @@ -3133,9 +2977,6 @@ channel_mark_client(channel_t *chan) * * This returns the is_canonical for a channel; this flag is determined by * the lower layer and can't be set in a transport-independent way. - * - * @param chan Channel to query - * @return Flag value */ int @@ -3153,10 +2994,6 @@ channel_is_canonical(channel_t *chan) * * This function asks if the lower layer thinks it's safe to trust the * result of channel_is_canonical() - * - * @param chan Channel to query - * @return 1 if the lower layer thinks the is_canonical flag is reliable, 0 - * otherwise. */ int @@ -3174,9 +3011,6 @@ channel_is_canonical_is_reliable(channel_t *chan) * * This function gets the incoming flag; this is set when a listener spawns * a channel. If this returns true the channel was remotely initiated. - * - * @param chan Channel to query - * @return Flag value */ int @@ -3193,8 +3027,6 @@ channel_is_incoming(channel_t *chan) * * This function is called when a channel arrives on a listening channel * to mark it as incoming. - * - * @param chan Channel to mark */ void @@ -3214,9 +3046,6 @@ channel_mark_incoming(channel_t *chan) * destinations it will communicate with on behalf of this channel. It's * used to decide whether to declare the network reachable when seeing incoming * traffic on the channel. - * - * @param chan Channel to query - * @return Flag value */ int @@ -3234,8 +3063,6 @@ channel_is_local(channel_t *chan) * This internal-only function should be called by the lower layer if the * channel is to a local address. See channel_is_local() above or the * description of the is_local bit in channel.h - * - * @param chan Channel to mark */ void @@ -3253,9 +3080,6 @@ channel_mark_local(channel_t *chan) * This function gets the outgoing flag; this is the inverse of the incoming * bit set when a listener spawns a channel. If this returns true the channel * was locally initiated. - * - * @param chan Channel to query - * @return Flag value */ int @@ -3272,8 +3096,6 @@ channel_is_outgoing(channel_t *chan) * * This function clears the incoming flag and thus marks a channel as * outgoing. - * - * @param chan Channel to mark */ void @@ -3294,8 +3116,6 @@ channel_mark_outgoing(channel_t *chan) * * This updates the channel's created timestamp and should only be called * from channel_init(). - * - * @param chan Channel to update */ void @@ -3317,8 +3137,6 @@ channel_timestamp_created(channel_t *chan) * is also updated from channel_timestamp_recv() and channel_timestamp_xmit(), * but it should be updated for things like the v3 handshake and stuff that * produce activity only visible to the lower layer. - * - * @param chan Channel to update */ void @@ -3336,8 +3154,6 @@ channel_timestamp_active(channel_t *chan) * * This function updates the channel's last accepted timestamp; it should be * called whenever a new incoming channel is accepted on a listener. - * - * @param chan Channel to update */ void @@ -3356,8 +3172,6 @@ channel_timestamp_accepted(channel_t *chan) * * This function is called by relay.c to timestamp a channel that appears to * be used as a client. - * - * @param chan Channel to update */ void @@ -3376,8 +3190,6 @@ channel_timestamp_client(channel_t *chan) * * This is called whenever we transmit a cell which leaves the outgoing cell * queue completely empty. It also updates the xmit time and the active time. - * - * @param chan Channel to update */ void @@ -3398,8 +3210,6 @@ channel_timestamp_drained(channel_t *chan) * * This is called whenever we get an incoming cell from the lower layer. * This also updates the active timestamp. - * - * @param chan Channel to update */ void @@ -3418,8 +3228,6 @@ channel_timestamp_recv(channel_t *chan) * Update the xmit timestamp * This is called whenever we pass an outgoing cell to the lower layer. This * also updates the active timestamp. - * - * @param chan Channel to update */ void @@ -3440,9 +3248,6 @@ channel_timestamp_xmit(channel_t *chan) /** * Query created timestamp - * - * @param chan Channel to query - * @return Created timestamp value for chan */ time_t @@ -3455,9 +3260,6 @@ channel_when_created(channel_t *chan) /** * Query last active timestamp - * - * @param chan Channel to query - * @return Last active timestamp value for chan */ time_t @@ -3470,9 +3272,6 @@ channel_when_last_active(channel_t *chan) /** * Query last accepted timestamp - * - * @param chan Channel to query - * @return Last accepted timestamp value for chan */ time_t @@ -3486,9 +3285,6 @@ channel_when_last_accepted(channel_t *chan) /** * Query client timestamp - * - * @param chan Channel to query - * @return Client timestamp value for chan */ time_t @@ -3502,9 +3298,6 @@ channel_when_last_client(channel_t *chan) /** * Query drained timestamp - * - * @param chan Channel to query - * @return drained timestamp value for chan */ time_t @@ -3518,9 +3311,6 @@ channel_when_last_drained(channel_t *chan) /** * Query recv timestamp - * - * @param chan Channel to query - * @return Recv timestamp value for chan */ time_t @@ -3534,9 +3324,6 @@ channel_when_last_recv(channel_t *chan) /** * Query xmit timestamp - * - * @param chan Channel to query - * @return Xmit timestamp value for chan */ time_t @@ -3550,9 +3337,6 @@ channel_when_last_xmit(channel_t *chan) /** * Query accepted counter - * - * @param chan Channel to query - * @return Number of incoming channels accepted by this listener */ uint64_t @@ -3566,9 +3350,6 @@ channel_count_accepted(channel_t *chan) /** * Query received cell counter - * - * @param chan Channel to query - * @return Number of cells received by this channel */ uint64_t @@ -3582,9 +3363,6 @@ channel_count_recved(channel_t *chan) /** * Query transmitted cell counter - * - * @param chan Channel to query - * @return Number of cells transmitted by this channel */ uint64_t @@ -3601,10 +3379,6 @@ channel_count_xmitted(channel_t *chan) * * This function calls the lower layer and asks if this channel matches a * given extend_info_t. - * - * @param chan Channel to test - * @param extend_info Pointer to extend_info_t to match - * @return 1 if they match, 0 otherwise */ int @@ -3623,10 +3397,6 @@ channel_matches_extend_info(channel_t *chan, extend_info_t *extend_info) * * This function calls into the lower layer and asks if this channel thinks * it matches a given target address for circuit extension purposes. - * - * @param chan Channel to test - * @param target Address to match - * @return 1 if they match, 0 otherwise */ int @@ -3646,9 +3416,6 @@ channel_matches_target_addr_for_extend(channel_t *chan, * * This is called when setting up a channel and replaces the old * connection_or_set_circid_type() - * - * @param chan Channel to set up - * @param identity_rcvd Remote end's identity public key */ void diff --git a/src/or/channeltls.c b/src/or/channeltls.c index bb6ef9b..bb90ce5 100644 --- a/src/or/channeltls.c +++ b/src/or/channeltls.c @@ -89,11 +89,6 @@ static int enter_v3_handshake_with_cell(var_cell_t *cell, * Launch a new OR connection to addr:port and expect to * handshake with an OR with identity digest id_digest, and wrap * it in a channel_tls_t. - * - * @param addr Address to connect on - * @param port Port to connect on - * @param id_digest Identity digest we want - * @return The launched channel, or NULL if it failed. */ channel_t * @@ -161,8 +156,6 @@ channel_tls_connect(const tor_addr_t *addr, uint16_t port, * * Returns the current listening channel for incoming TLS connections, or * NULL if none has been established - * - * @return TLS listener */ channel_t * @@ -176,8 +169,6 @@ channel_tls_get_listener(void) * * Return the current channel_tls_t listener, or start one if we haven't yet, * and return that. - * - * @return TLS listener */ channel_t * @@ -235,9 +226,6 @@ channel_tls_free_all(void) /** * Create a new channel around an incoming or_connection_t - * - * @param orconn New or_connection_t - * @return A channel to queue on the TLS listener */ channel_t * @@ -288,8 +276,6 @@ channel_tls_handle_incoming(or_connection_t *orconn) * Close a channel_tls_t * * This implements the close method for channel_tls_t - * - * @param chan Channel to close */ static void @@ -384,10 +370,6 @@ channel_tls_describe_transport_method(channel_t *chan) * This implements the get_remote_addr method for channel_tls_t; copy the * remote endpoint of the channel to addr_out and return 1 (always * succeeds for this transport). - * - * @param chan Channel to query - * @param addr_out Write the address out here - * @return Always succeeds and returns 1 */ static int @@ -411,10 +393,6 @@ channel_tls_get_remote_addr_method(channel_t *chan, tor_addr_t *addr_out) * a text description of the remote endpoint of the channel suitable for use * in log messages. The req parameter is 0 for the canonical address or 1 for * the actual address seen. - * - * @param chan Channel to query - * @param req Request type (0 for canonical, 1 for actual) - * @return Pointer to string containing description */ static const char * @@ -461,9 +439,6 @@ channel_tls_get_remote_descr_method(channel_t *chan, int req) * * This implements the has_queued_writes method for channel_tls _t; it returns * 1 iff we have queued writes on the outbuf of the underlying or_connection_t. - * - * @param chan Channel to query - * @return Whether we have queued writes on the outbuf */ static int @@ -486,10 +461,6 @@ channel_tls_has_queued_writes_method(channel_t *chan) * This implements the is_canonical method for channel_tls_t; if req is zero, * it returns whether this is a canonical channel, and if it is one it returns * whether that can be relied upon. - * - * @param chan Channel to query - * @param req Request type (0 for is_canonical, 1 for is_canonical_reliable) - * @return Query response */ static int @@ -526,10 +497,6 @@ channel_tls_is_canonical_method(channel_t *chan, int req) * * This implements the matches_extend_info method for channel_tls_t; the upper * layer wants to know if this channel matches an extend_info_t. - * - * @param chan Channel to test - * @param extend_info The extend_info_t to match - * @return 1 if this channel matches, 0 otherwise */ static int @@ -552,10 +519,6 @@ channel_tls_matches_extend_info_method(channel_t *chan, * This implements the matches_target method for channel_tls _t; the upper * layer wants to know if this channel matches a target address when extending * a circuit. - * - * @param chan Channel to test - * @param target Address to match - * @return 1 if this channel matches, 0 otherwise */ static int @@ -577,10 +540,6 @@ channel_tls_matches_target_method(channel_t *chan, * * This implements the write_cell method for channel_tls_t; given a * channel_tls_t and a cell_t, transmit the cell_t. - * - * @param chan Channel to transmit on - * @param cell Cell to transmit - * @return Always succeeds and returns 1 */ static int @@ -602,10 +561,6 @@ channel_tls_write_cell_method(channel_t *chan, cell_t *cell) * * This implements the write_packed_cell method for channel_tls_t; given a * channel_tls_t and a packed_cell_t, transmit the packed_cell_t. - * - * @param chan Channel to transmit on - * @param packed_cell Cell to transmit - * @return Always succeeds and returns 1 */ static int @@ -632,10 +587,6 @@ channel_tls_write_packed_cell_method(channel_t *chan, * * This implements the write_var_cell method for channel_tls_t; given a * channel_tls_t and a var_cell_t, transmit the var_cell_t. - * - * @param chan Channel to transmit on - * @param var_cell Cell to transmit - * @return Always succeeds and returns 1 */ static int @@ -657,15 +608,10 @@ channel_tls_write_var_cell_method(channel_t *chan, var_cell_t *var_cell) ******************************************************/ /** - * Handle orconn state changes + * Handle an orconn state change * * This function will be called by connection_or.c when the or_connection_t * associated with this channel_tls_t changes state. - * - * @param chan Channel controlling the or_connection_t - * @param conn The or_connection_t changing state - * @param old_state The old state of conn - * @param state The new state of conn */ void @@ -712,13 +658,9 @@ channel_tls_handle_state_change_on_orconn(channel_tls_t *chan, } /** - * Try to flush cells from a channel_tls_t + * Flush cells from a channel_tls_t * * Try to flush up to about num_cells cells, and return how many we flushed. - * - * @param chan Channel to flush - * @param num_cells Maximum number of cells - * @return Number of cells actually flushed */ ssize_t @@ -752,9 +694,6 @@ channel_tls_flush_some_cells(channel_tls_t *chan, ssize_t num_cells) * * Return true if there is any more to flush on this channel (cells in queue * or active circuits). - * - * @param chan Channel to test - * @return 1 if chan has anything to flush, 0 otherwise */ int @@ -778,12 +717,6 @@ channel_tls_more_to_flush(channel_tls_t *chan) * This is a wrapper function around the actual function that processes the * cell that just arrived on chan. Increment *time * by the number of microseconds used by the call to *func(cell, chan). - * - * @param cell Incoming cell to process - * @param chan Channel it arrived on - * @param time Increment this by the number of microseconds it took to handle - * this cell - * @param func Function pointer to cell handling function */ static void @@ -820,9 +753,6 @@ channel_tls_time_process_cell(cell_t *cell, channel_tls_t *chan, int *time, * for cell types specific to the handshake for this transport protocol and * handles them, and queues all other cells to the channel_t layer, which * eventually will hand them off to command.c. - * - * @param cell Cell to handle - * @param conn The or_connection_t cell arrived on */ void @@ -920,9 +850,6 @@ channel_tls_handle_cell(cell_t *cell, or_connection_t *conn) * related and live below the channel_t layer, so no variable-length * cells ever get delivered in the current implementation, but I've left * the mechanism in place for future use. - * - * @param var_cell Incoming cell to handle - * @param conn The or_connection_t var_cell arrived on */ void @@ -1091,8 +1018,6 @@ channel_tls_handle_var_cell(var_cell_t *var_cell, or_connection_t *conn) * * Return true if command is a cell command that's allowed to start a * V3 handshake. - * - * @param command Cell type to check */ static int @@ -1115,10 +1040,6 @@ command_allowed_before_handshake(uint8_t command) * either for a cell or a TLS handshake. Set the connection's state to * "handshaking_v3', initializes the or_handshake_state field as needed, * and add the cell to the hash of incoming cells.) - * - * @param cell Incoming cell initiating the handshake - * @param chan Channel cell was received on - * @return 0 on success; return -1 and mark the connection on failure. */ static int @@ -1159,9 +1080,6 @@ enter_v3_handshake_with_cell(var_cell_t *cell, channel_tls_t *chan) * negotiated. We compare the versions in the cell to the list of versions * we support, pick the highest version we have in common, and continue the * negotiation from there. - * - * @param cell Incoming VERSIONS cell - * @param chan Channel that cell arrived on */ static void @@ -1311,9 +1229,6 @@ channel_tls_process_versions_cell(var_cell_t *cell, channel_tls_t *chan) * * This function is called to handle an incoming NETINFO cell; read and act * on its contents, and set the connection state to "open". - * - * @param cell Incoming NETINFO cell - * @param chan Channel that cell arrived on */ static void @@ -1493,9 +1408,6 @@ channel_tls_process_netinfo_cell(cell_t *cell, channel_tls_t *chan) * store the certificates in or_handshake_state. If this is the client side * of the connection, we then authenticate the server or mark the connection. * If it's the server side, wait for an AUTHENTICATE cell. - * - * @param cell Incoming CERTS cell - * @param chan Channel that cell arrived on */ static void @@ -1694,9 +1606,6 @@ channel_tls_process_certs_cell(var_cell_t *cell, channel_tls_t *chan) * a v3 handshake, mark the channel. If the cell is well-formed but we don't * want to authenticate, just drop it. If the cell is well-formed *and* we * want to authenticate, send an AUTHENTICATE cell and then a NETINFO cell. - * - * @param cell Incoming AUTH_CHALLENGE cell to handle - * @param chan Channel that cell arrived on */ static void @@ -1794,9 +1703,6 @@ channel_tls_process_auth_challenge_cell(var_cell_t *cell, channel_tls_t *chan) * other side of the connection successfully (because it isn't signed right, * we didn't get a CERTS cell, etc) mark the connection. Otherwise, accept * the identity of the router on the other side of the connection. - * - * @param cell Incoming AUTHENTICATE cell - * @param chan Channel that cell arrived on */ static void

1 0

[tor/master] Split channel_t into channel_t and channel_listener_t; get rid of that big union
by andrea＠torproject.org 10 Oct '12

10 Oct '12

commit 3f4b95b1a32787464b5877c7d21474801d4b944c Author: Andrea Shepard <andrea(a)torproject.org> Date: Tue Oct 9 00:51:33 2012 -0700 Split channel_t into channel_t and channel_listener_t; get rid of that big union --- src/or/channel.c | 2123 ++++++++++++++++++++++++++++------------------ src/or/channel.h | 419 ++++++---- src/or/channeltls.c | 241 +++--- src/or/channeltls.h | 4 +- src/or/circuitbuild.c | 31 +- src/or/circuitlist.c | 19 +- src/or/circuituse.c | 5 +- src/or/command.c | 17 +- src/or/command.h | 2 +- src/or/connection_edge.c | 3 +- src/or/connection_or.c | 14 +- src/or/main.c | 2 + src/or/or.h | 65 ++- src/or/relay.c | 68 +- 14 files changed, 1788 insertions(+), 1225 deletions(-) diff --git a/src/or/channel.c b/src/or/channel.c index 57b9e4f..278daa6 100644 --- a/src/or/channel.c +++ b/src/or/channel.c @@ -55,12 +55,18 @@ static smartlist_t *all_channels = NULL; /* All channel_t instances not in ERROR or CLOSED states */ static smartlist_t *active_channels = NULL; -/* All channel_t instances in LISTENING state */ -static smartlist_t *listening_channels = NULL; - /* All channel_t instances in ERROR or CLOSED states */ static smartlist_t *finished_channels = NULL; +/* All channel_listener_t instances */ +static smartlist_t *all_listeners = NULL; + +/* All channel_listener_t instances in LISTENING state */ +static smartlist_t *active_listeners = NULL; + +/* All channel_listener_t instances in LISTENING state */ +static smartlist_t *finished_listeners = NULL; + /* Counter for ID numbers */ static uint64_t n_channels_allocated = 0; @@ -89,6 +95,11 @@ channel_flush_some_cells_from_outgoing_queue(channel_t *chan, ssize_t num_cells); static void channel_force_free(channel_t *chan); static void +channel_free_list(smartlist_t *channels, int mark_for_close); +static void +channel_listener_free_list(smartlist_t *channels, int mark_for_close); +static void channel_listener_force_free(channel_listener_t *chan_l); +static void channel_write_cell_queue_entry(channel_t *chan, cell_queue_entry_t *q); /*********************************** @@ -108,7 +119,6 @@ channel_state_is_valid(channel_state_t state) case CHANNEL_STATE_CLOSED: case CHANNEL_STATE_CLOSING: case CHANNEL_STATE_ERROR: - case CHANNEL_STATE_LISTENING: case CHANNEL_STATE_MAINT: case CHANNEL_STATE_OPENING: case CHANNEL_STATE_OPEN: @@ -123,6 +133,30 @@ channel_state_is_valid(channel_state_t state) } /** + * Indicate whether a given channel listener state is valid + */ + +int +channel_listener_state_is_valid(channel_listener_state_t state) +{ + int is_valid; + + switch (state) { + case CHANNEL_LISTENER_STATE_CLOSED: + case CHANNEL_LISTENER_STATE_LISTENING: + case CHANNEL_LISTENER_STATE_CLOSING: + case CHANNEL_LISTENER_STATE_ERROR: + is_valid = 1; + break; + case CHANNEL_LISTENER_STATE_LAST: + default: + is_valid = 0; + } + + return is_valid; +} + +/** * Indicate whether a channel state transition is valid * * This function takes two channel states and indicates whether a @@ -137,8 +171,7 @@ channel_state_can_transition(channel_state_t from, channel_state_t to) switch (from) { case CHANNEL_STATE_CLOSED: - is_valid = (to == CHANNEL_STATE_LISTENING || - to == CHANNEL_STATE_OPENING); + is_valid = (to == CHANNEL_STATE_OPENING); break; case CHANNEL_STATE_CLOSING: is_valid = (to == CHANNEL_STATE_CLOSED || @@ -147,10 +180,6 @@ channel_state_can_transition(channel_state_t from, channel_state_t to) case CHANNEL_STATE_ERROR: is_valid = 0; break; - case CHANNEL_STATE_LISTENING: - is_valid = (to == CHANNEL_STATE_CLOSING || - to == CHANNEL_STATE_ERROR); - break; case CHANNEL_STATE_MAINT: is_valid = (to == CHANNEL_STATE_CLOSING || to == CHANNEL_STATE_ERROR || @@ -175,6 +204,43 @@ channel_state_can_transition(channel_state_t from, channel_state_t to) } /** + * Indicate whether a channel listener state transition is valid + * + * This function takes two channel listener states and indicates whether a + * transition between them is permitted (see the state definitions and + * transition table in or.h at the channel_listener_state_t typedef). + */ + +int +channel_listener_state_can_transition(channel_listener_state_t from, + channel_listener_state_t to) +{ + int is_valid; + + switch (from) { + case CHANNEL_LISTENER_STATE_CLOSED: + is_valid = (to == CHANNEL_LISTENER_STATE_LISTENING); + break; + case CHANNEL_LISTENER_STATE_CLOSING: + is_valid = (to == CHANNEL_LISTENER_STATE_CLOSED || + to == CHANNEL_LISTENER_STATE_ERROR); + break; + case CHANNEL_LISTENER_STATE_ERROR: + is_valid = 0; + break; + case CHANNEL_LISTENER_STATE_LISTENING: + is_valid = (to == CHANNEL_LISTENER_STATE_CLOSING || + to == CHANNEL_LISTENER_STATE_ERROR); + break; + case CHANNEL_LISTENER_STATE_LAST: + default: + is_valid = 0; + } + + return is_valid; +} + +/** * Return a human-readable description for a channel state */ @@ -193,9 +259,6 @@ channel_state_to_string(channel_state_t state) case CHANNEL_STATE_ERROR: descr = "channel error"; break; - case CHANNEL_STATE_LISTENING: - descr = "listening"; - break; case CHANNEL_STATE_MAINT: descr = "temporarily suspended for maintenance"; break; @@ -213,6 +276,36 @@ channel_state_to_string(channel_state_t state) return descr; } +/** + * Return a human-readable description for a channel listenier state + */ + +const char * +channel_listener_state_to_string(channel_listener_state_t state) +{ + const char *descr; + + switch (state) { + case CHANNEL_LISTENER_STATE_CLOSED: + descr = "closed"; + break; + case CHANNEL_LISTENER_STATE_CLOSING: + descr = "closing"; + break; + case CHANNEL_LISTENER_STATE_ERROR: + descr = "channel listener error"; + break; + case CHANNEL_LISTENER_STATE_LISTENING: + descr = "listening"; + break; + case CHANNEL_LISTENER_STATE_LAST: + default: + descr = "unknown or invalid channel listener state"; + } + + return descr; +} + /*************************************** * Channel registration/unregistration * ***************************************/ @@ -232,20 +325,12 @@ channel_register(channel_t *chan) /* No-op if already registered */ if (chan->registered) return; - if (chan->is_listener) { - log_debug(LD_CHANNEL, - "Registering listener channel %p (ID " U64_FORMAT ") " - "in state %s (%d)", - chan, U64_PRINTF_ARG(chan->global_identifier), - channel_state_to_string(chan->state), chan->state); - } else { - log_debug(LD_CHANNEL, - "Registering cell channel %p (ID " U64_FORMAT ") " - "in state %s (%d) with digest %s", - chan, U64_PRINTF_ARG(chan->global_identifier), - channel_state_to_string(chan->state), chan->state, - hex_str(chan->u.cell_chan.identity_digest, DIGEST_LEN)); - } + log_debug(LD_CHANNEL, + "Registering channel %p (ID " U64_FORMAT ") " + "in state %s (%d) with digest %s", + chan, U64_PRINTF_ARG(chan->global_identifier), + channel_state_to_string(chan->state), chan->state, + hex_str(chan->identity_digest, DIGEST_LEN)); /* Make sure we have all_channels, then add it */ if (!all_channels) all_channels = smartlist_new(); @@ -262,25 +347,17 @@ channel_register(channel_t *chan) if (!active_channels) active_channels = smartlist_new(); smartlist_add(active_channels, chan); - /* Is it a listener? */ - if (chan->is_listener && - chan->state == CHANNEL_STATE_LISTENING) { - /* Put it in the listening list, creating it if necessary */ - if (!listening_channels) listening_channels = smartlist_new(); - smartlist_add(listening_channels, chan); - } else if (chan->state != CHANNEL_STATE_CLOSING) { - if (!(chan->is_listener)) { - /* It should have a digest set */ - if (!tor_digest_is_zero(chan->u.cell_chan.identity_digest)) { - /* Yeah, we're good, add it to the map */ - channel_add_to_digest_map(chan); - } else { - log_info(LD_CHANNEL, - "Channel %p (global ID " U64_FORMAT ") " - "in state %s (%d) registered with no identity digest", - chan, U64_PRINTF_ARG(chan->global_identifier), - channel_state_to_string(chan->state), chan->state); - } + if (chan->state != CHANNEL_STATE_CLOSING) { + /* It should have a digest set */ + if (!tor_digest_is_zero(chan->identity_digest)) { + /* Yeah, we're good, add it to the map */ + channel_add_to_digest_map(chan); + } else { + log_info(LD_CHANNEL, + "Channel %p (global ID " U64_FORMAT ") " + "in state %s (%d) registered with no identity digest", + chan, U64_PRINTF_ARG(chan->global_identifier), + channel_state_to_string(chan->state), chan->state); } } } @@ -312,12 +389,6 @@ channel_unregister(channel_t *chan) } else { /* Get it out of the active list */ if (active_channels) smartlist_remove(active_channels, chan); - - /* Is it listening? */ - if (chan->state == CHANNEL_STATE_LISTENING) { - /* Get it out of the listening list */ - if (listening_channels) smartlist_remove(listening_channels, chan); - } } /* Get it out of all_channels */ @@ -326,17 +397,88 @@ channel_unregister(channel_t *chan) /* Mark it as unregistered */ chan->registered = 0; - if (!(chan->is_listener)) { - /* Should it be in the digest map? */ - if (!tor_digest_is_zero(chan->u.cell_chan.identity_digest) && - !(chan->state == CHANNEL_STATE_LISTENING || - chan->state == CHANNEL_STATE_CLOSING || - chan->state == CHANNEL_STATE_CLOSED || - chan->state == CHANNEL_STATE_ERROR)) { - /* Remove it */ - channel_remove_from_digest_map(chan); - } + /* Should it be in the digest map? */ + if (!tor_digest_is_zero(chan->identity_digest) && + !(chan->state == CHANNEL_STATE_CLOSING || + chan->state == CHANNEL_STATE_CLOSED || + chan->state == CHANNEL_STATE_ERROR)) { + /* Remove it */ + channel_remove_from_digest_map(chan); + } +} + +/** + * Register a channel listener + * + * This function registers a newly created channel listner in the global + * lists/maps of active channel listeners. + */ + +void +channel_listener_register(channel_listener_t *chan_l) +{ + tor_assert(chan_l); + + /* No-op if already registered */ + if (chan_l->registered) return; + + log_debug(LD_CHANNEL, + "Registering channel listener %p (ID " U64_FORMAT ") " + "in state %s (%d)", + chan_l, U64_PRINTF_ARG(chan_l->global_identifier), + channel_listener_state_to_string(chan_l->state), + chan_l->state); + + /* Make sure we have all_channels, then add it */ + if (!all_listeners) all_listeners = smartlist_new(); + smartlist_add(all_listeners, chan_l); + + /* Is it finished? */ + if (chan_l->state == CHANNEL_LISTENER_STATE_CLOSED || + chan_l->state == CHANNEL_LISTENER_STATE_ERROR) { + /* Put it in the finished list, creating it if necessary */ + if (!finished_listeners) finished_listeners = smartlist_new(); + smartlist_add(finished_listeners, chan_l); + } else { + /* Put it in the active list, creating it if necessary */ + if (!active_listeners) active_listeners = smartlist_new(); + smartlist_add(active_listeners, chan_l); + } + + /* Mark it as registered */ + chan_l->registered = 1; +} + +/** + * Unregister a channel listener + * + * This function removes a channel listener from the global lists and maps + * and is used when freeing a closed/errored channel listener. + */ + +void +channel_listener_unregister(channel_listener_t *chan_l) +{ + tor_assert(chan_l); + + /* No-op if not registered */ + if (!(chan_l->registered)) return; + + /* Is it finished? */ + if (chan_l->state == CHANNEL_LISTENER_STATE_CLOSED || + chan_l->state == CHANNEL_LISTENER_STATE_ERROR) { + /* Get it out of the finished list */ + if (finished_listeners) smartlist_remove(finished_listeners, chan_l); + } else { + /* Get it out of the active list */ + if (active_listeners) smartlist_remove(active_listeners, chan_l); } + + /* Get it out of all_channels */ + if (all_listeners) smartlist_remove(all_listeners, chan_l); + + /* Mark it as unregistered */ + chan_l->registered = 0; } /********************************* @@ -357,34 +499,31 @@ channel_add_to_digest_map(channel_t *chan) channel_t *tmp; tor_assert(chan); - tor_assert(!(chan->is_listener)); /* Assert that the state makes sense */ - tor_assert(!(chan->state == CHANNEL_STATE_LISTENING || - chan->state == CHANNEL_STATE_CLOSING || + tor_assert(!(chan->state == CHANNEL_STATE_CLOSING || chan->state == CHANNEL_STATE_CLOSED || chan->state == CHANNEL_STATE_ERROR)); /* Assert that there is a digest */ - tor_assert(!tor_digest_is_zero(chan->u.cell_chan.identity_digest)); + tor_assert(!tor_digest_is_zero(chan->identity_digest)); /* Allocate the identity map if we have to */ if (!channel_identity_map) channel_identity_map = digestmap_new(); /* Insert it */ tmp = digestmap_set(channel_identity_map, - chan->u.cell_chan.identity_digest, + chan->identity_digest, chan); if (tmp) { - tor_assert(!(tmp->is_listener)); /* There already was one, this goes at the head of the list */ - chan->u.cell_chan.next_with_same_id = tmp; - chan->u.cell_chan.prev_with_same_id = NULL; - tmp->u.cell_chan.prev_with_same_id = chan; + chan->next_with_same_id = tmp; + chan->prev_with_same_id = NULL; + tmp->prev_with_same_id = chan; } else { /* First with this digest */ - chan->u.cell_chan.next_with_same_id = NULL; - chan->u.cell_chan.prev_with_same_id = NULL; + chan->next_with_same_id = NULL; + chan->prev_with_same_id = NULL; } log_debug(LD_CHANNEL, @@ -392,7 +531,7 @@ channel_add_to_digest_map(channel_t *chan) "to identity map in state %s (%d) with digest %s", chan, U64_PRINTF_ARG(chan->global_identifier), channel_state_to_string(chan->state), chan->state, - hex_str(chan->u.cell_chan.identity_digest, DIGEST_LEN)); + hex_str(chan->identity_digest, DIGEST_LEN)); } /** @@ -408,10 +547,9 @@ channel_remove_from_digest_map(channel_t *chan) channel_t *tmp, *head; tor_assert(chan); - tor_assert(!(chan->is_listener)); /* Assert that there is a digest */ - tor_assert(!tor_digest_is_zero(chan->u.cell_chan.identity_digest)); + tor_assert(!tor_digest_is_zero(chan->identity_digest)); /* Make sure we have a map */ if (!channel_identity_map) { @@ -424,72 +562,62 @@ channel_remove_from_digest_map(channel_t *chan) "with digest %s from identity map, but didn't have any identity " "map", chan, U64_PRINTF_ARG(chan->global_identifier), - hex_str(chan->u.cell_chan.identity_digest, DIGEST_LEN)); + hex_str(chan->identity_digest, DIGEST_LEN)); /* Clear out its next/prev pointers */ - if (chan->u.cell_chan.next_with_same_id) { - tor_assert(!(chan->u.cell_chan.next_with_same_id->is_listener)); - chan->u.cell_chan.next_with_same_id->u.cell_chan.prev_with_same_id - = chan->u.cell_chan.prev_with_same_id; + if (chan->next_with_same_id) { + chan->next_with_same_id->prev_with_same_id = chan->prev_with_same_id; } - if (chan->u.cell_chan.prev_with_same_id) { - tor_assert(!(chan->u.cell_chan.prev_with_same_id->is_listener)); - chan->u.cell_chan.prev_with_same_id->u.cell_chan.next_with_same_id - = chan->u.cell_chan.next_with_same_id; + if (chan->prev_with_same_id) { + chan->prev_with_same_id->next_with_same_id = chan->next_with_same_id; } - chan->u.cell_chan.next_with_same_id = NULL; - chan->u.cell_chan.prev_with_same_id = NULL; + chan->next_with_same_id = NULL; + chan->prev_with_same_id = NULL; return; } /* Look for it in the map */ - tmp = digestmap_get(channel_identity_map, chan->u.cell_chan.identity_digest); + tmp = digestmap_get(channel_identity_map, chan->identity_digest); if (tmp) { /* Okay, it's here */ head = tmp; /* Keep track of list head */ /* Look for this channel */ while (tmp && tmp != chan) { - tor_assert(!(tmp->is_listener)); - tmp = tmp->u.cell_chan.next_with_same_id; + tmp = tmp->next_with_same_id; } if (tmp == chan) { /* Found it, good */ - if (chan->u.cell_chan.next_with_same_id) { - tor_assert(!(chan->u.cell_chan.next_with_same_id->is_listener)); - chan->u.cell_chan.next_with_same_id->u.cell_chan.prev_with_same_id - = chan->u.cell_chan.prev_with_same_id; + if (chan->next_with_same_id) { + chan->next_with_same_id->prev_with_same_id = chan->prev_with_same_id; } /* else we're the tail of the list */ - if (chan->u.cell_chan.prev_with_same_id) { - tor_assert(!(chan->u.cell_chan.prev_with_same_id->is_listener)); + if (chan->prev_with_same_id) { /* We're not the head of the list, so we can *just* unlink */ - chan->u.cell_chan.prev_with_same_id->u.cell_chan.next_with_same_id - = chan->u.cell_chan.next_with_same_id; + chan->prev_with_same_id->next_with_same_id = chan->next_with_same_id; } else { /* We're the head, so we have to point the digest map entry at our * next if we have one, or remove it if we're also the tail */ - if (chan->u.cell_chan.next_with_same_id) { - tor_assert(!(chan->u.cell_chan.next_with_same_id->is_listener)); + if (chan->next_with_same_id) { digestmap_set(channel_identity_map, - chan->u.cell_chan.identity_digest, - chan->u.cell_chan.next_with_same_id); + chan->identity_digest, + chan->next_with_same_id); } else { digestmap_remove(channel_identity_map, - chan->u.cell_chan.identity_digest); + chan->identity_digest); } } /* NULL out its next/prev pointers, and we're finished */ - chan->u.cell_chan.next_with_same_id = NULL; - chan->u.cell_chan.prev_with_same_id = NULL; + chan->next_with_same_id = NULL; + chan->prev_with_same_id = NULL; log_debug(LD_CHANNEL, "Removed channel %p (global ID " U64_FORMAT ") from " "identity map in state %s (%d) with digest %s", chan, U64_PRINTF_ARG(chan->global_identifier), channel_state_to_string(chan->state), chan->state, - hex_str(chan->u.cell_chan.identity_digest, DIGEST_LEN)); + hex_str(chan->identity_digest, DIGEST_LEN)); } else { /* This is not good */ log_warn(LD_BUG, @@ -497,20 +625,16 @@ channel_remove_from_digest_map(channel_t *chan) "with digest %s from identity map, but couldn't find it in " "the list for that digest", chan, U64_PRINTF_ARG(chan->global_identifier), - hex_str(chan->u.cell_chan.identity_digest, DIGEST_LEN)); + hex_str(chan->identity_digest, DIGEST_LEN)); /* Unlink it and hope for the best */ - if (chan->u.cell_chan.next_with_same_id) { - tor_assert(!(chan->u.cell_chan.next_with_same_id->is_listener)); - chan->u.cell_chan.next_with_same_id->u.cell_chan.prev_with_same_id - = chan->u.cell_chan.prev_with_same_id; + if (chan->next_with_same_id) { + chan->next_with_same_id->prev_with_same_id = chan->prev_with_same_id; } - if (chan->u.cell_chan.prev_with_same_id) { - tor_assert(!(chan->u.cell_chan.prev_with_same_id->is_listener)); - chan->u.cell_chan.prev_with_same_id->u.cell_chan.next_with_same_id - = chan->u.cell_chan.next_with_same_id; + if (chan->prev_with_same_id) { + chan->prev_with_same_id->next_with_same_id = chan->next_with_same_id; } - chan->u.cell_chan.next_with_same_id = NULL; - chan->u.cell_chan.prev_with_same_id = NULL; + chan->next_with_same_id = NULL; + chan->prev_with_same_id = NULL; } } else { /* Shouldn't happen */ @@ -519,19 +643,16 @@ channel_remove_from_digest_map(channel_t *chan) "digest %s from identity map, but couldn't find any with " "that digest", chan, U64_PRINTF_ARG(chan->global_identifier), - hex_str(chan->u.cell_chan.identity_digest, DIGEST_LEN)); + hex_str(chan->identity_digest, DIGEST_LEN)); /* Clear out its next/prev pointers */ - if (chan->u.cell_chan.next_with_same_id) { - tor_assert(!(chan->u.cell_chan.next_with_same_id->is_listener)); - chan->u.cell_chan.next_with_same_id->u.cell_chan.prev_with_same_id - = chan->u.cell_chan.prev_with_same_id; + if (chan->next_with_same_id) { + chan->next_with_same_id->prev_with_same_id = chan->prev_with_same_id; } - if (chan->u.cell_chan.prev_with_same_id) { - chan->u.cell_chan.prev_with_same_id->u.cell_chan.next_with_same_id - = chan->u.cell_chan.next_with_same_id; + if (chan->prev_with_same_id) { + chan->prev_with_same_id->next_with_same_id = chan->next_with_same_id; } - chan->u.cell_chan.next_with_same_id = NULL; - chan->u.cell_chan.prev_with_same_id = NULL; + chan->next_with_same_id = NULL; + chan->prev_with_same_id = NULL; } } @@ -599,9 +720,8 @@ channel_t * channel_next_with_digest(channel_t *chan) { tor_assert(chan); - tor_assert(!(chan->is_listener)); - return chan->u.cell_chan.next_with_same_id; + return chan->next_with_same_id; } /** @@ -614,19 +734,13 @@ channel_next_with_digest(channel_t *chan) channel_t * channel_prev_with_digest(channel_t *chan) { - channel_t *rv = NULL; - tor_assert(chan); - tor_assert(!(chan->is_listener)); - if (chan->u.cell_chan.prev_with_same_id) - rv = chan->u.cell_chan.prev_with_same_id; - - return rv; + return chan->prev_with_same_id; } /** - * Initialize a cell channel + * Initialize a channel * * This function should be called by subclasses to set up some per-channel * variables. I.e., this is the superclass constructor. Before this, the @@ -634,47 +748,41 @@ channel_prev_with_digest(channel_t *chan) */ void -channel_init_for_cells(channel_t *chan) +channel_init(channel_t *chan) { tor_assert(chan); /* Assign an ID and bump the counter */ chan->global_identifier = n_channels_allocated++; - /* Mark as a non-listener */ - chan->is_listener = 0; - /* Init timestamp */ - chan->u.cell_chan.timestamp_last_added_nonpadding = time(NULL); + chan->timestamp_last_added_nonpadding = time(NULL); /* Init next_circ_id */ - chan->u.cell_chan.next_circ_id = crypto_rand_int(1 << 15); + chan->next_circ_id = crypto_rand_int(1 << 15); /* Timestamp it */ channel_timestamp_created(chan); } /** - * Initialize a listener channel + * Initialize a channel listener * * This function should be called by subclasses to set up some per-channel * variables. I.e., this is the superclass constructor. Before this, the - * channel should be allocated with tor_malloc_zero(). + * channel listener should be allocated with tor_malloc_zero(). */ void -channel_init_listener(channel_t *chan) +channel_init_listener(channel_listener_t *chan_l) { - tor_assert(chan); + tor_assert(chan_l); /* Assign an ID and bump the counter */ - chan->global_identifier = n_channels_allocated++; - - /* Mark as a listener */ - chan->is_listener = 1; + chan_l->global_identifier = n_channels_allocated++; /* Timestamp it */ - channel_timestamp_created(chan); + channel_listener_timestamp_created(chan_l); } /** @@ -696,13 +804,11 @@ channel_free(channel_t *chan) /* Call a free method if there is one */ if (chan->free) chan->free(chan); - if (!(chan->is_listener)) { - channel_clear_remote_end(chan); + channel_clear_remote_end(chan); - if (chan->u.cell_chan.active_circuit_pqueue) { - smartlist_free(chan->u.cell_chan.active_circuit_pqueue); - chan->u.cell_chan.active_circuit_pqueue = NULL; - } + if (chan->active_circuit_pqueue) { + smartlist_free(chan->active_circuit_pqueue); + chan->active_circuit_pqueue = NULL; } /* We're in CLOSED or ERROR, so the cell queue is already empty */ @@ -711,7 +817,35 @@ channel_free(channel_t *chan) } /** - * Free a channel and skip the state/reigstration asserts; this internal- + * Free a channel listener; nothing outside of channel.c and subclasses + * should call this - it frees channel listeners after they have closed and + * been unregistered. + */ + +void +channel_listener_free(channel_listener_t *chan_l) +{ + if (!chan_l) return; + + /* It must be closed or errored */ + tor_assert(chan_l->state == CHANNEL_LISTENER_STATE_CLOSED || + chan_l->state == CHANNEL_LISTENER_STATE_ERROR); + /* It must be deregistered */ + tor_assert(!(chan_l->registered)); + + /* Call a free method if there is one */ + if (chan_l->free) chan_l->free(chan_l); + + /* + * We're in CLOSED or ERROR, so the incoming channel queue is already + * empty. + */ + + tor_free(chan_l); +} + +/** + * Free a channel and skip the state/registration asserts; this internal- * use-only function should be called only from channel_free_all() when * shutting down the Tor process. */ @@ -724,96 +858,111 @@ channel_force_free(channel_t *chan) /* Call a free method if there is one */ if (chan->free) chan->free(chan); - if (chan->is_listener) { - /* - * The incoming list just gets emptied and freed; we request close on - * any channels we find there, but since we got called while shutting - * down they will get deregistered and freed elsewhere anyway. - */ - if (chan->u.listener.incoming_list) { - SMARTLIST_FOREACH_BEGIN(chan->u.listener.incoming_list, - channel_t *, qchan) { - channel_mark_for_close(qchan); - } SMARTLIST_FOREACH_END(qchan); - - smartlist_free(chan->u.listener.incoming_list); - chan->u.listener.incoming_list = NULL; - } - } else { - channel_clear_remote_end(chan); - smartlist_free(chan->u.cell_chan.active_circuit_pqueue); - - /* We might still have a cell queue; kill it */ - if (chan->u.cell_chan.incoming_queue) { - SMARTLIST_FOREACH_BEGIN(chan->u.cell_chan.incoming_queue, - cell_queue_entry_t *, q) { - tor_free(q); - } SMARTLIST_FOREACH_END(q); - - smartlist_free(chan->u.cell_chan.incoming_queue); - chan->u.cell_chan.incoming_queue = NULL; - } + channel_clear_remote_end(chan); + smartlist_free(chan->active_circuit_pqueue); + + /* We might still have a cell queue; kill it */ + if (chan->incoming_queue) { + SMARTLIST_FOREACH_BEGIN(chan->incoming_queue, + cell_queue_entry_t *, q) { + tor_free(q); + } SMARTLIST_FOREACH_END(q); + + smartlist_free(chan->incoming_queue); + chan->incoming_queue = NULL; + } - /* Outgoing cell queue is similar, but we can have to free packed cells */ - if (chan->u.cell_chan.outgoing_queue) { - SMARTLIST_FOREACH_BEGIN(chan->u.cell_chan.outgoing_queue, - cell_queue_entry_t *, q) { - if (q->type == CELL_QUEUE_PACKED) { - if (q->u.packed.packed_cell) { - packed_cell_free(q->u.packed.packed_cell); - } + /* Outgoing cell queue is similar, but we can have to free packed cells */ + if (chan->outgoing_queue) { + SMARTLIST_FOREACH_BEGIN(chan->outgoing_queue, + cell_queue_entry_t *, q) { + if (q->type == CELL_QUEUE_PACKED) { + if (q->u.packed.packed_cell) { + packed_cell_free(q->u.packed.packed_cell); } - tor_free(q); - } SMARTLIST_FOREACH_END(q); + } + tor_free(q); + } SMARTLIST_FOREACH_END(q); - smartlist_free(chan->u.cell_chan.outgoing_queue); - chan->u.cell_chan.outgoing_queue = NULL; - } + smartlist_free(chan->outgoing_queue); + chan->outgoing_queue = NULL; } tor_free(chan); } /** - * Return the current registered listener for a channel + * Free a channel listener and skip the state/reigstration asserts; this + * internal-use-only function should be called only from channel_free_all() + * when shutting down the Tor process. + */ + +static void +channel_listener_force_free(channel_listener_t *chan_l) +{ + tor_assert(chan_l); + + /* Call a free method if there is one */ + if (chan_l->free) chan_l->free(chan_l); + + /* + * The incoming list just gets emptied and freed; we request close on + * any channels we find there, but since we got called while shutting + * down they will get deregistered and freed elsewhere anyway. + */ + if (chan_l->incoming_list) { + SMARTLIST_FOREACH_BEGIN(chan_l->incoming_list, + channel_t *, qchan) { + channel_mark_for_close(qchan); + } SMARTLIST_FOREACH_END(qchan); + + smartlist_free(chan_l->incoming_list); + chan_l->incoming_list = NULL; + } + + tor_free(chan_l); +} + +/** + * Return the current registered listener for a channel listener * * This function returns a function pointer to the current registered - * handler for new incoming channels on a listener channel. + * handler for new incoming channels on a channel listener. */ channel_listener_fn_ptr -channel_get_listener_fn(channel_t *chan) +channel_listener_get_listener_fn(channel_listener_t *chan_l) { - tor_assert(chan); - tor_assert(chan->is_listener); + tor_assert(chan_l); - if (chan->state == CHANNEL_STATE_LISTENING) - return chan->u.listener.listener; + if (chan_l->state == CHANNEL_LISTENER_STATE_LISTENING) + return chan_l->listener; return NULL; } /** - * Set the listener for a channel + * Set the listener for a channel listener * - * This function sets the handler for new incoming channels on a listener - * channel. + * This function sets the handler for new incoming channels on a channel + * listener. */ void -channel_set_listener_fn(channel_t *chan, - channel_listener_fn_ptr listener) +channel_listener_set_listener_fn(channel_listener_t *chan_l, + channel_listener_fn_ptr listener) { - tor_assert(chan); - tor_assert(chan->is_listener); - tor_assert(chan->state == CHANNEL_STATE_LISTENING); + tor_assert(chan_l); + tor_assert(chan_l->state == CHANNEL_LISTENER_STATE_LISTENING); log_debug(LD_CHANNEL, - "Setting listener callback for channel %p to %p", - chan, listener); + "Setting listener callback for channel listener %p " + "(global ID " U64_FORMAT ") to %p", + chan_l, U64_PRINTF_ARG(chan_l->global_identifier), + listener); - chan->u.listener.listener = listener; - if (chan->u.listener.listener) channel_process_incoming(chan); + chan_l->listener = listener; + if (chan_l->listener) channel_listener_process_incoming(chan_l); } /** @@ -827,12 +976,11 @@ channel_cell_handler_fn_ptr channel_get_cell_handler(channel_t *chan) { tor_assert(chan); - tor_assert(!(chan->is_listener)); if (chan->state == CHANNEL_STATE_OPENING || chan->state == CHANNEL_STATE_OPEN || chan->state == CHANNEL_STATE_MAINT) - return chan->u.cell_chan.cell_handler; + return chan->cell_handler; return NULL; } @@ -848,12 +996,11 @@ channel_var_cell_handler_fn_ptr channel_get_var_cell_handler(channel_t *chan) { tor_assert(chan); - tor_assert(!(chan->is_listener)); if (chan->state == CHANNEL_STATE_OPENING || chan->state == CHANNEL_STATE_OPEN || chan->state == CHANNEL_STATE_MAINT) - return chan->u.cell_chan.var_cell_handler; + return chan->var_cell_handler; return NULL; } @@ -875,7 +1022,6 @@ channel_set_cell_handlers(channel_t *chan, int try_again = 0; tor_assert(chan); - tor_assert(!(chan->is_listener)); tor_assert(chan->state == CHANNEL_STATE_OPENING || chan->state == CHANNEL_STATE_OPEN || chan->state == CHANNEL_STATE_MAINT); @@ -889,20 +1035,20 @@ channel_set_cell_handlers(channel_t *chan, /* Should we try the queue? */ if (cell_handler && - cell_handler != chan->u.cell_chan.cell_handler) try_again = 1; + cell_handler != chan->cell_handler) try_again = 1; if (var_cell_handler && - var_cell_handler != chan->u.cell_chan.var_cell_handler) try_again = 1; + var_cell_handler != chan->var_cell_handler) try_again = 1; /* Change them */ - chan->u.cell_chan.cell_handler = cell_handler; - chan->u.cell_chan.var_cell_handler = var_cell_handler; + chan->cell_handler = cell_handler; + chan->var_cell_handler = var_cell_handler; /* Re-run the queue if we have one and there's any reason to */ - if (chan->u.cell_chan.incoming_queue && - (smartlist_len(chan->u.cell_chan.incoming_queue) > 0) && + if (chan->incoming_queue && + (smartlist_len(chan->incoming_queue) > 0) && try_again && - (chan->u.cell_chan.cell_handler || - chan->u.cell_chan.var_cell_handler)) channel_process_cells(chan); + (chan->cell_handler || + chan->var_cell_handler)) channel_process_cells(chan); } /** @@ -925,8 +1071,9 @@ channel_mark_for_close(channel_t *chan) chan->state == CHANNEL_STATE_ERROR) return; log_debug(LD_CHANNEL, - "Closing channel %p by request", - chan); + "Closing channel %p (global ID " U64_FORMAT ") " + "by request", + chan, U64_PRINTF_ARG(chan->global_identifier)); /* Note closing by request from above */ chan->reason_for_closing = CHANNEL_CLOSE_REQUESTED; @@ -946,6 +1093,47 @@ channel_mark_for_close(channel_t *chan) } /** + * Mark a channel listener for closure + * + * This function tries to close a channel_listener_t; it will go into the + * CLOSING state, and eventually the lower layer should put it into the CLOSED + * or ERROR state. Then, channel_run_cleanup() will eventually free it. + */ + +void +channel_listener_mark_for_close(channel_listener_t *chan_l) +{ + tor_assert(chan_l != NULL); + tor_assert(chan_l->close != NULL); + + /* If it's already in CLOSING, CLOSED or ERROR, this is a no-op */ + if (chan_l->state == CHANNEL_LISTENER_STATE_CLOSING || + chan_l->state == CHANNEL_LISTENER_STATE_CLOSED || + chan_l->state == CHANNEL_LISTENER_STATE_ERROR) return; + + log_debug(LD_CHANNEL, + "Closing channel listener %p (global ID " U64_FORMAT ") " + "by request", + chan_l, U64_PRINTF_ARG(chan_l->global_identifier)); + + /* Note closing by request from above */ + chan_l->reason_for_closing = CHANNEL_LISTENER_CLOSE_REQUESTED; + + /* Change state to CLOSING */ + channel_listener_change_state(chan_l, CHANNEL_LISTENER_STATE_CLOSING); + + /* Tell the lower layer */ + chan_l->close(chan_l); + + /* + * It's up to the lower layer to change state to CLOSED or ERROR when we're + * ready; we'll try to free channels that are in the finished list from + * channel_run_cleanup(). The lower layer should do this by calling + * channel_listener_closed(). + */ +} + +/** * Close a channel from the lower layer * * Notify the channel code that the channel is being closed due to a non-error @@ -964,8 +1152,9 @@ channel_close_from_lower_layer(channel_t *chan) chan->state == CHANNEL_STATE_ERROR) return; log_debug(LD_CHANNEL, - "Closing channel %p due to lower-layer event", - chan); + "Closing channel %p (global ID " U64_FORMAT ") " + "due to lower-layer event", + chan, U64_PRINTF_ARG(chan->global_identifier)); /* Note closing by event from below */ chan->reason_for_closing = CHANNEL_CLOSE_FROM_BELOW; @@ -975,6 +1164,36 @@ channel_close_from_lower_layer(channel_t *chan) } /** + * Close a channel listener from the lower layer + * + * Notify the channel code that the channel listener is being closed due to a + * non-error condition in the lower layer. This does not call the close() + * method, since the lower layer already knows. + */ + +void +channel_listener_close_from_lower_layer(channel_listener_t *chan_l) +{ + tor_assert(chan_l != NULL); + + /* If it's already in CLOSING, CLOSED or ERROR, this is a no-op */ + if (chan_l->state == CHANNEL_LISTENER_STATE_CLOSING || + chan_l->state == CHANNEL_LISTENER_STATE_CLOSED || + chan_l->state == CHANNEL_LISTENER_STATE_ERROR) return; + + log_debug(LD_CHANNEL, + "Closing channel listener %p (global ID " U64_FORMAT ") " + "due to lower-layer event", + chan_l, U64_PRINTF_ARG(chan_l->global_identifier)); + + /* Note closing by event from below */ + chan_l->reason_for_closing = CHANNEL_LISTENER_CLOSE_FROM_BELOW; + + /* Change state to CLOSING */ + channel_listener_change_state(chan_l, CHANNEL_LISTENER_STATE_CLOSING); +} + +/** * Notify that the channel is being closed due to an error condition * * This function is called by the lower layer implementing the transport @@ -1004,6 +1223,37 @@ channel_close_for_error(channel_t *chan) } /** + * Notify that the channel listener is being closed due to an error condition + * + * This function is called by the lower layer implementing the transport + * when a channel listener must be closed due to an error condition. This + * does not call the channel listener's close method, since the lower layer + * already knows. + */ + +void +channel_listener_close_for_error(channel_listener_t *chan_l) +{ + tor_assert(chan_l != NULL); + + /* If it's already in CLOSING, CLOSED or ERROR, this is a no-op */ + if (chan_l->state == CHANNEL_LISTENER_STATE_CLOSING || + chan_l->state == CHANNEL_LISTENER_STATE_CLOSED || + chan_l->state == CHANNEL_LISTENER_STATE_ERROR) return; + + log_debug(LD_CHANNEL, + "Closing channel listener %p (global ID " U64_FORMAT ") " + "due to lower-layer error", + chan_l, U64_PRINTF_ARG(chan_l->global_identifier)); + + /* Note closing by event from below */ + chan_l->reason_for_closing = CHANNEL_LISTENER_CLOSE_FOR_ERROR; + + /* Change state to CLOSING */ + channel_listener_change_state(chan_l, CHANNEL_LISTENER_STATE_CLOSING); +} + +/** * Notify that the lower layer is finished closing the channel * * This function should be called by the lower layer when a channel @@ -1039,6 +1289,33 @@ channel_closed(channel_t *chan) } /** + * Notify that the lower layer is finished closing the channel listener + * + * This function should be called by the lower layer when a channel listener + * is finished closing and it should be regarded as inactive and + * freed by the channel code. + */ + +void +channel_listener_closed(channel_listener_t *chan_l) +{ + tor_assert(chan_l); + tor_assert(chan_l->state == CHANNEL_LISTENER_STATE_CLOSING || + chan_l->state == CHANNEL_LISTENER_STATE_CLOSED || + chan_l->state == CHANNEL_LISTENER_STATE_ERROR); + + /* No-op if already inactive */ + if (chan_l->state == CHANNEL_LISTENER_STATE_CLOSED || + chan_l->state == CHANNEL_LISTENER_STATE_ERROR) return; + + if (chan_l->reason_for_closing != CHANNEL_LISTENER_CLOSE_FOR_ERROR) { + channel_listener_change_state(chan_l, CHANNEL_LISTENER_STATE_CLOSED); + } else { + channel_listener_change_state(chan_l, CHANNEL_LISTENER_STATE_ERROR); + } +} + +/** * Clear the identity_digest of a channel * * This function clears the identity digest of the remote endpoint for a @@ -1051,7 +1328,6 @@ channel_clear_identity_digest(channel_t *chan) int state_not_in_map; tor_assert(chan); - tor_assert(!(chan->is_listener)); log_debug(LD_CHANNEL, "Clearing remote endpoint digest on channel %p with " @@ -1059,18 +1335,17 @@ channel_clear_identity_digest(channel_t *chan) chan, U64_PRINTF_ARG(chan->global_identifier)); state_not_in_map = - (chan->state == CHANNEL_STATE_LISTENING || - chan->state == CHANNEL_STATE_CLOSING || + (chan->state == CHANNEL_STATE_CLOSING || chan->state == CHANNEL_STATE_CLOSED || chan->state == CHANNEL_STATE_ERROR); if (!state_not_in_map && chan->registered && - !tor_digest_is_zero(chan->u.cell_chan.identity_digest)) + !tor_digest_is_zero(chan->identity_digest)) /* if it's registered get it out of the digest map */ channel_remove_from_digest_map(chan); - memset(chan->u.cell_chan.identity_digest, 0, - sizeof(chan->u.cell_chan.identity_digest)); + memset(chan->identity_digest, 0, + sizeof(chan->identity_digest)); } /** @@ -1087,7 +1362,6 @@ channel_set_identity_digest(channel_t *chan, int was_in_digest_map, should_be_in_digest_map, state_not_in_map; tor_assert(chan); - tor_assert(!(chan->is_listener)); log_debug(LD_CHANNEL, "Setting remote endpoint digest on channel %p with " @@ -1097,14 +1371,13 @@ channel_set_identity_digest(channel_t *chan, hex_str(identity_digest, DIGEST_LEN) : "(null)"); state_not_in_map = - (chan->state == CHANNEL_STATE_LISTENING || - chan->state == CHANNEL_STATE_CLOSING || + (chan->state == CHANNEL_STATE_CLOSING || chan->state == CHANNEL_STATE_CLOSED || chan->state == CHANNEL_STATE_ERROR); was_in_digest_map = !state_not_in_map && chan->registered && - !tor_digest_is_zero(chan->u.cell_chan.identity_digest); + !tor_digest_is_zero(chan->identity_digest); should_be_in_digest_map = !state_not_in_map && chan->registered && @@ -1118,12 +1391,12 @@ channel_set_identity_digest(channel_t *chan, channel_remove_from_digest_map(chan); if (identity_digest) { - memcpy(chan->u.cell_chan.identity_digest, + memcpy(chan->identity_digest, identity_digest, - sizeof(chan->u.cell_chan.identity_digest)); + sizeof(chan->identity_digest)); } else { - memset(chan->u.cell_chan.identity_digest, 0, - sizeof(chan->u.cell_chan.identity_digest)); + memset(chan->identity_digest, 0, + sizeof(chan->identity_digest)); } /* Put it in the digest map if we should */ @@ -1144,7 +1417,6 @@ channel_clear_remote_end(channel_t *chan) int state_not_in_map; tor_assert(chan); - tor_assert(!(chan->is_listener)); log_debug(LD_CHANNEL, "Clearing remote endpoint identity on channel %p with " @@ -1152,19 +1424,18 @@ channel_clear_remote_end(channel_t *chan) chan, U64_PRINTF_ARG(chan->global_identifier)); state_not_in_map = - (chan->state == CHANNEL_STATE_LISTENING || - chan->state == CHANNEL_STATE_CLOSING || + (chan->state == CHANNEL_STATE_CLOSING || chan->state == CHANNEL_STATE_CLOSED || chan->state == CHANNEL_STATE_ERROR); if (!state_not_in_map && chan->registered && - !tor_digest_is_zero(chan->u.cell_chan.identity_digest)) + !tor_digest_is_zero(chan->identity_digest)) /* if it's registered get it out of the digest map */ channel_remove_from_digest_map(chan); - memset(chan->u.cell_chan.identity_digest, 0, - sizeof(chan->u.cell_chan.identity_digest)); - tor_free(chan->u.cell_chan.nickname); + memset(chan->identity_digest, 0, + sizeof(chan->identity_digest)); + tor_free(chan->nickname); } /** @@ -1182,7 +1453,6 @@ channel_set_remote_end(channel_t *chan, int was_in_digest_map, should_be_in_digest_map, state_not_in_map; tor_assert(chan); - tor_assert(!(chan->is_listener)); log_debug(LD_CHANNEL, "Setting remote endpoint identity on channel %p with " @@ -1193,14 +1463,13 @@ channel_set_remote_end(channel_t *chan, hex_str(identity_digest, DIGEST_LEN) : "(null)"); state_not_in_map = - (chan->state == CHANNEL_STATE_LISTENING || - chan->state == CHANNEL_STATE_CLOSING || + (chan->state == CHANNEL_STATE_CLOSING || chan->state == CHANNEL_STATE_CLOSED || chan->state == CHANNEL_STATE_ERROR); was_in_digest_map = !state_not_in_map && chan->registered && - !tor_digest_is_zero(chan->u.cell_chan.identity_digest); + !tor_digest_is_zero(chan->identity_digest); should_be_in_digest_map = !state_not_in_map && chan->registered && @@ -1214,18 +1483,18 @@ channel_set_remote_end(channel_t *chan, channel_remove_from_digest_map(chan); if (identity_digest) { - memcpy(chan->u.cell_chan.identity_digest, + memcpy(chan->identity_digest, identity_digest, - sizeof(chan->u.cell_chan.identity_digest)); + sizeof(chan->identity_digest)); } else { - memset(chan->u.cell_chan.identity_digest, 0, - sizeof(chan->u.cell_chan.identity_digest)); + memset(chan->identity_digest, 0, + sizeof(chan->identity_digest)); } - tor_free(chan->u.cell_chan.nickname); + tor_free(chan->nickname); if (nickname) - chan->u.cell_chan.nickname = tor_strdup(nickname); + chan->nickname = tor_strdup(nickname); /* Put it in the digest map if we should */ if (should_be_in_digest_map) @@ -1275,7 +1544,6 @@ channel_write_cell_queue_entry(channel_t *chan, cell_queue_entry_t *q) cell_queue_entry_t *tmp = NULL; tor_assert(chan); - tor_assert(!(chan->is_listener)); tor_assert(q); /* Assert that the state makes sense for a cell write */ @@ -1285,31 +1553,29 @@ channel_write_cell_queue_entry(channel_t *chan, cell_queue_entry_t *q) /* Increment the timestamp unless it's padding */ if (!cell_queue_entry_is_padding(q)) { - chan->u.cell_chan.timestamp_last_added_nonpadding = approx_time(); + chan->timestamp_last_added_nonpadding = approx_time(); } /* Can we send it right out? If so, try */ - if (!(chan->u.cell_chan.outgoing_queue && - (smartlist_len(chan->u.cell_chan.outgoing_queue) > 0)) && + if (!(chan->outgoing_queue && + (smartlist_len(chan->outgoing_queue) > 0)) && chan->state == CHANNEL_STATE_OPEN) { /* Pick the right write function for this cell type and save the result */ switch (q->type) { case CELL_QUEUE_FIXED: - tor_assert(chan->u.cell_chan.write_cell); + tor_assert(chan->write_cell); tor_assert(q->u.fixed.cell); - result = chan->u.cell_chan.write_cell(chan, q->u.fixed.cell); + result = chan->write_cell(chan, q->u.fixed.cell); break; case CELL_QUEUE_PACKED: - tor_assert(chan->u.cell_chan.write_packed_cell); + tor_assert(chan->write_packed_cell); tor_assert(q->u.packed.packed_cell); - result = chan-> - u.cell_chan.write_packed_cell(chan, - q->u.packed.packed_cell); + result = chan->write_packed_cell(chan, q->u.packed.packed_cell); break; case CELL_QUEUE_VAR: - tor_assert(chan->u.cell_chan.write_var_cell); + tor_assert(chan->write_var_cell); tor_assert(q->u.var.var_cell); - result = chan->u.cell_chan.write_var_cell(chan, q->u.var.var_cell); + result = chan->write_var_cell(chan, q->u.var.var_cell); break; default: tor_assert(1); @@ -1323,21 +1589,21 @@ channel_write_cell_queue_entry(channel_t *chan, cell_queue_entry_t *q) /* If we're here the queue is empty, so it's drained too */ channel_timestamp_drained(chan); /* Update the counter */ - ++(chan->u.cell_chan.n_cells_xmitted); + ++(chan->n_cells_xmitted); } } if (!sent) { /* Not sent, queue it */ - if (!(chan->u.cell_chan.outgoing_queue)) - chan->u.cell_chan.outgoing_queue = smartlist_new(); + if (!(chan->outgoing_queue)) + chan->outgoing_queue = smartlist_new(); /* * We have to copy the queue entry passed in, since the caller probably * used the stack. */ tmp = tor_malloc(sizeof(*tmp)); memcpy(tmp, q, sizeof(*tmp)); - smartlist_add(chan->u.cell_chan.outgoing_queue, tmp); + smartlist_add(chan->outgoing_queue, tmp); /* Try to process the queue? */ if (chan->state == CHANNEL_STATE_OPEN) channel_flush_cells(chan); } @@ -1432,7 +1698,7 @@ void channel_change_state(channel_t *chan, channel_state_t to_state) { channel_state_t from_state; - unsigned char was_active, is_active, was_listening, is_listening; + unsigned char was_active, is_active; unsigned char was_in_id_map, is_in_id_map; tor_assert(chan); @@ -1442,26 +1708,13 @@ channel_change_state(channel_t *chan, channel_state_t to_state) tor_assert(channel_state_is_valid(to_state)); tor_assert(channel_state_can_transition(chan->state, to_state)); - if (chan->is_listener) { - tor_assert(from_state == CHANNEL_STATE_LISTENING || - from_state == CHANNEL_STATE_CLOSING || - from_state == CHANNEL_STATE_CLOSED || - from_state == CHANNEL_STATE_ERROR); - tor_assert(to_state == CHANNEL_STATE_LISTENING || - to_state == CHANNEL_STATE_CLOSING || - to_state == CHANNEL_STATE_CLOSED || - to_state == CHANNEL_STATE_ERROR); - } else { - tor_assert(from_state != CHANNEL_STATE_LISTENING); - tor_assert(to_state != CHANNEL_STATE_LISTENING); - } - /* Check for no-op transitions */ if (from_state == to_state) { log_debug(LD_CHANNEL, - "Got no-op transition from \"%s\" to itself on channel %p", + "Got no-op transition from \"%s\" to itself on channel %p" + "(global ID " U64_FORMAT ")", channel_state_to_string(to_state), - chan); + chan, U64_PRINTF_ARG(chan->global_identifier)); return; } @@ -1482,8 +1735,10 @@ channel_change_state(channel_t *chan, channel_state_t to_state) */ log_debug(LD_CHANNEL, - "Changing state of channel %p from \"%s\" to \"%s\"", + "Changing state of channel %p (global ID " U64_FORMAT + ") from \"%s\" to \"%s\"", chan, + U64_PRINTF_ARG(chan->global_identifier), channel_state_to_string(chan->state), channel_state_to_string(to_state)); @@ -1509,28 +1764,12 @@ channel_change_state(channel_t *chan, channel_state_t to_state) smartlist_add(active_channels, chan); } - was_listening = (from_state == CHANNEL_STATE_LISTENING); - is_listening = (to_state == CHANNEL_STATE_LISTENING); - - /* Need to put on listening list? */ - if (!was_listening && is_listening) { - if (!listening_channels) listening_channels = smartlist_new(); - smartlist_add(listening_channels, chan); - } - /* Need to remove from listening list? */ - else if (was_listening && !is_listening) { - if (listening_channels) smartlist_remove(listening_channels, chan); - } - - if (!(chan->is_listener) && - !tor_digest_is_zero(chan->u.cell_chan.identity_digest)) { + if (!tor_digest_is_zero(chan->identity_digest)) { /* Now we need to handle the identity map */ - was_in_id_map = !(from_state == CHANNEL_STATE_LISTENING || - from_state == CHANNEL_STATE_CLOSING || + was_in_id_map = !(from_state == CHANNEL_STATE_CLOSING || from_state == CHANNEL_STATE_CLOSED || from_state == CHANNEL_STATE_ERROR); - is_in_id_map = !(to_state == CHANNEL_STATE_LISTENING || - to_state == CHANNEL_STATE_CLOSING || + is_in_id_map = !(to_state == CHANNEL_STATE_CLOSING || to_state == CHANNEL_STATE_CLOSED || to_state == CHANNEL_STATE_ERROR); @@ -1541,30 +1780,110 @@ channel_change_state(channel_t *chan, channel_state_t to_state) } /* Tell circuits if we opened and stuff */ - if (to_state == CHANNEL_STATE_OPEN) channel_do_open_actions(chan); + if (to_state == CHANNEL_STATE_OPEN) { + channel_do_open_actions(chan); - if (!(chan->is_listener) && - to_state == CHANNEL_STATE_OPEN) { /* Check for queued cells to process */ - if (chan->u.cell_chan.incoming_queue && - smartlist_len(chan->u.cell_chan.incoming_queue) > 0) + if (chan->incoming_queue && + smartlist_len(chan->incoming_queue) > 0) channel_process_cells(chan); - if (chan->u.cell_chan.outgoing_queue && - smartlist_len(chan->u.cell_chan.outgoing_queue) > 0) + if (chan->outgoing_queue && + smartlist_len(chan->outgoing_queue) > 0) channel_flush_cells(chan); } else if (to_state == CHANNEL_STATE_CLOSED || to_state == CHANNEL_STATE_ERROR) { /* Assert that all queues are empty */ - if (chan->is_listener) { - tor_assert(!(chan->u.listener.incoming_list) || - smartlist_len(chan->u.listener.incoming_list) == 0); - } else { - tor_assert(!(chan->u.cell_chan.incoming_queue) || - smartlist_len(chan->u.cell_chan.incoming_queue) == 0); - tor_assert(!(chan->u.cell_chan.outgoing_queue) || - smartlist_len(chan->u.cell_chan.outgoing_queue) == 0); + tor_assert(!(chan->incoming_queue) || + smartlist_len(chan->incoming_queue) == 0); + tor_assert(!(chan->outgoing_queue) || + smartlist_len(chan->outgoing_queue) == 0); + } +} + +/** + * Change channel listener state + * + * This internal and subclass use only function is used to change channel + * listener state, performing all transition validity checks and whatever + * actions are appropriate to the state transition in question. + */ + +void +channel_listener_change_state(channel_listener_t *chan_l, + channel_listener_state_t to_state) +{ + channel_listener_state_t from_state; + unsigned char was_active, is_active; + + tor_assert(chan_l); + from_state = chan_l->state; + + tor_assert(channel_listener_state_is_valid(from_state)); + tor_assert(channel_listener_state_is_valid(to_state)); + tor_assert(channel_listener_state_can_transition(chan_l->state, to_state)); + + /* Check for no-op transitions */ + if (from_state == to_state) { + log_debug(LD_CHANNEL, + "Got no-op transition from \"%s\" to itself on channel " + "listener %p (global ID " U64_FORMAT ")", + channel_listener_state_to_string(to_state), + chan_l, U64_PRINTF_ARG(chan_l->global_identifier)); + return; + } + + /* If we're going to a closing or closed state, we must have a reason set */ + if (to_state == CHANNEL_LISTENER_STATE_CLOSING || + to_state == CHANNEL_LISTENER_STATE_CLOSED || + to_state == CHANNEL_LISTENER_STATE_ERROR) { + tor_assert(chan_l->reason_for_closing != CHANNEL_LISTENER_NOT_CLOSING); + } + + /* + * We need to maintain the queues here for some transitions: + * when we enter CHANNEL_STATE_OPEN (especially from CHANNEL_STATE_MAINT) + * we may have a backlog of cells to transmit, so drain the queues in + * that case, and when going to CHANNEL_STATE_CLOSED the subclass + * should have made sure to finish sending things (or gone to + * CHANNEL_STATE_ERROR if not possible), so we assert for that here. + */ + + log_debug(LD_CHANNEL, + "Changing state of channel listener %p (global ID " U64_FORMAT + "from \"%s\" to \"%s\"", + chan_l, U64_PRINTF_ARG(chan_l->global_identifier), + channel_listener_state_to_string(chan_l->state), + channel_listener_state_to_string(to_state)); + + chan_l->state = to_state; + + /* Need to add to the right lists if the channel listener is registered */ + if (chan_l->registered) { + was_active = !(from_state == CHANNEL_LISTENER_STATE_CLOSED || + from_state == CHANNEL_LISTENER_STATE_ERROR); + is_active = !(to_state == CHANNEL_LISTENER_STATE_CLOSED || + to_state == CHANNEL_LISTENER_STATE_ERROR); + + /* Need to take off active list and put on finished list? */ + if (was_active && !is_active) { + if (active_listeners) smartlist_remove(active_listeners, chan_l); + if (!finished_listeners) finished_listeners = smartlist_new(); + smartlist_add(finished_listeners, chan_l); + } + /* Need to put on active list? */ + else if (!was_active && is_active) { + if (finished_listeners) smartlist_remove(finished_listeners, chan_l); + if (!active_listeners) active_listeners = smartlist_new(); + smartlist_add(active_listeners, chan_l); } } + + if (to_state == CHANNEL_LISTENER_STATE_CLOSED || + to_state == CHANNEL_LISTENER_STATE_ERROR) { + /* Assert that the queue is empty */ + tor_assert(!(chan_l->incoming_list) || + smartlist_len(chan_l->incoming_list) == 0); + } } /** @@ -1586,7 +1905,6 @@ channel_flush_some_cells(channel_t *chan, ssize_t num_cells) int num_cells_from_circs; tor_assert(chan); - tor_assert(!(chan->is_listener)); if (num_cells < 0) unlimited = 1; if (!unlimited && num_cells <= flushed) goto done; @@ -1598,7 +1916,7 @@ channel_flush_some_cells(channel_t *chan, ssize_t num_cells) (unlimited ? -1 : num_cells - flushed)); if (!unlimited && num_cells <= flushed) goto done; - if (chan->u.cell_chan.active_circuits) { + if (chan->active_circuits) { /* Try to get more cells from any active circuits */ num_cells_from_circs = channel_flush_from_first_active_circuit(chan, @@ -1633,10 +1951,9 @@ channel_flush_some_cells_from_outgoing_queue(channel_t *chan, cell_queue_entry_t *q = NULL; tor_assert(chan); - tor_assert(!(chan->is_listener)); - tor_assert(chan->u.cell_chan.write_cell); - tor_assert(chan->u.cell_chan.write_packed_cell); - tor_assert(chan->u.cell_chan.write_var_cell); + tor_assert(chan->write_cell); + tor_assert(chan->write_packed_cell); + tor_assert(chan->write_var_cell); if (num_cells < 0) unlimited = 1; if (!unlimited && num_cells <= flushed) return 0; @@ -1644,15 +1961,15 @@ channel_flush_some_cells_from_outgoing_queue(channel_t *chan, /* If we aren't in CHANNEL_STATE_OPEN, nothing goes through */ if (chan->state == CHANNEL_STATE_OPEN) { while ((unlimited || num_cells > flushed) && - (chan->u.cell_chan.outgoing_queue && - (smartlist_len(chan->u.cell_chan.outgoing_queue) > 0))) { + (chan->outgoing_queue && + (smartlist_len(chan->outgoing_queue) > 0))) { /* * Ewww, smartlist_del_keeporder() is O(n) in list length; maybe a * a linked list would make more sense for the queue. */ /* Get the head of the queue */ - q = smartlist_get(chan->u.cell_chan.outgoing_queue, 0); + q = smartlist_get(chan->outgoing_queue, 0); if (q) { /* * Okay, we have a good queue entry, try to give it to the lower @@ -1661,60 +1978,63 @@ channel_flush_some_cells_from_outgoing_queue(channel_t *chan, switch (q->type) { case CELL_QUEUE_FIXED: if (q->u.fixed.cell) { - if (chan->u.cell_chan.write_cell(chan, + if (chan->write_cell(chan, q->u.fixed.cell)) { tor_free(q); ++flushed; channel_timestamp_xmit(chan); - ++(chan->u.cell_chan.n_cells_xmitted); + ++(chan->n_cells_xmitted); } /* Else couldn't write it; leave it on the queue */ } else { /* This shouldn't happen */ log_info(LD_CHANNEL, "Saw broken cell queue entry of type CELL_QUEUE_FIXED " - "with no cell on channel %p.", - chan); + "with no cell on channel %p " + "(global ID " U64_FORMAT ").", + chan, U64_PRINTF_ARG(chan->global_identifier)); /* Throw it away */ tor_free(q); } break; case CELL_QUEUE_PACKED: if (q->u.packed.packed_cell) { - if (chan->u.cell_chan.write_packed_cell(chan, + if (chan->write_packed_cell(chan, q->u.packed.packed_cell)) { tor_free(q); ++flushed; channel_timestamp_xmit(chan); - ++(chan->u.cell_chan.n_cells_xmitted); + ++(chan->n_cells_xmitted); } /* Else couldn't write it; leave it on the queue */ } else { /* This shouldn't happen */ log_info(LD_CHANNEL, "Saw broken cell queue entry of type CELL_QUEUE_PACKED " - "with no cell on channel %p.", - chan); + "with no cell on channel %p " + "(global ID " U64_FORMAT ").", + chan, U64_PRINTF_ARG(chan->global_identifier)); /* Throw it away */ tor_free(q); } break; case CELL_QUEUE_VAR: if (q->u.var.var_cell) { - if (chan->u.cell_chan.write_var_cell(chan, + if (chan->write_var_cell(chan, q->u.var.var_cell)) { tor_free(q); ++flushed; channel_timestamp_xmit(chan); - ++(chan->u.cell_chan.n_cells_xmitted); + ++(chan->n_cells_xmitted); } /* Else couldn't write it; leave it on the queue */ } else { /* This shouldn't happen */ log_info(LD_CHANNEL, "Saw broken cell queue entry of type CELL_QUEUE_VAR " - "with no cell on channel %p.", - chan); + "with no cell on channel %p " + "(global ID " U64_FORMAT ").", + chan, U64_PRINTF_ARG(chan->global_identifier)); /* Throw it away */ tor_free(q); } @@ -1722,30 +2042,31 @@ channel_flush_some_cells_from_outgoing_queue(channel_t *chan, default: /* Unknown type, log and free it */ log_info(LD_CHANNEL, - "Saw an unknown cell queue entry type %d on channel %p; " - "ignoring it. Someone should fix this.", - q->type, chan); + "Saw an unknown cell queue entry type %d on channel %p " + "(global ID " U64_FORMAT "; ignoring it." + " Someone should fix this.", + q->type, chan, U64_PRINTF_ARG(chan->global_identifier)); tor_free(q); /* tor_free() NULLs it out */ } } else { /* This shouldn't happen; log and throw it away */ log_info(LD_CHANNEL, - "Saw a NULL entry in the outgoing cell queue on channel %p; " - "this is definitely a bug.", - chan); + "Saw a NULL entry in the outgoing cell queue on channel %p " + "(global ID " U64_FORMAT "); this is definitely a bug.", + chan, U64_PRINTF_ARG(chan->global_identifier)); /* q is already NULL, so we know to delete that queue entry */ } /* if q got NULLed out, we used it and should remove the queue entry */ - if (!q) smartlist_del_keeporder(chan->u.cell_chan.outgoing_queue, 0); + if (!q) smartlist_del_keeporder(chan->outgoing_queue, 0); /* No cell removed from list, so we can't go on any further */ else break; } } /* Did we drain the queue? */ - if (!(chan->u.cell_chan.outgoing_queue) || - smartlist_len(chan->u.cell_chan.outgoing_queue) == 0) { + if (!(chan->outgoing_queue) || + smartlist_len(chan->outgoing_queue) == 0) { /* Timestamp it */ channel_timestamp_drained(chan); } @@ -1778,14 +2099,13 @@ int channel_more_to_flush(channel_t *chan) { tor_assert(chan); - tor_assert(!(chan->is_listener)); /* Check if we have any queued */ - if (chan->u.cell_chan.incoming_queue && - smartlist_len(chan->u.cell_chan.incoming_queue) > 0) return 1; + if (chan->incoming_queue && + smartlist_len(chan->incoming_queue) > 0) return 1; /* Check if any circuits would like to queue some */ - if (chan->u.cell_chan.active_circuits) return 1; + if (chan->active_circuits) return 1; /* Else no */ return 0; @@ -1802,10 +2122,9 @@ void channel_notify_flushed(channel_t *chan) { tor_assert(chan); - tor_assert(!(chan->is_listener)); - if (chan->u.cell_chan.dirreq_id != 0) - geoip_change_dirreq_state(chan->u.cell_chan.dirreq_id, + if (chan->dirreq_id != 0) + geoip_change_dirreq_state(chan->dirreq_id, DIRREQ_TUNNELED, DIRREQ_CHANNEL_BUFFER_FLUSHED); } @@ -1818,32 +2137,31 @@ channel_notify_flushed(channel_t *chan) */ void -channel_process_incoming(channel_t *listener) +channel_listener_process_incoming(channel_listener_t *listener) { tor_assert(listener); - tor_assert(listener->is_listener); + /* - * CHANNEL_STATE_CLOSING permitted because we drain the queue while - * closing a listener. + * CHANNEL_LISTENER_STATE_CLOSING permitted because we drain the queue + * while closing a listener. */ - tor_assert(listener->state == CHANNEL_STATE_LISTENING || - listener->state == CHANNEL_STATE_CLOSING); - tor_assert(listener->u.listener.listener); + tor_assert(listener->state == CHANNEL_LISTENER_STATE_LISTENING || + listener->state == CHANNEL_LISTENER_STATE_CLOSING); + tor_assert(listener->listener); log_debug(LD_CHANNEL, - "Processing queue of incoming connections for listening " - "channel %p (global ID " U64_FORMAT ")", + "Processing queue of incoming connections for channel " + "listener %p (global ID " U64_FORMAT ")", listener, U64_PRINTF_ARG(listener->global_identifier)); - if (!(listener->u.listener.incoming_list)) return; + if (!(listener->incoming_list)) return; - SMARTLIST_FOREACH_BEGIN(listener->u.listener.incoming_list, + SMARTLIST_FOREACH_BEGIN(listener->incoming_list, channel_t *, chan) { tor_assert(chan); - tor_assert(!(chan->is_listener)); log_debug(LD_CHANNEL, - "Handling incoming connection %p (" U64_FORMAT ") " + "Handling incoming channel %p (" U64_FORMAT ") " "for listener %p (" U64_FORMAT ")", chan, U64_PRINTF_ARG(chan->global_identifier), @@ -1851,11 +2169,11 @@ channel_process_incoming(channel_t *listener) U64_PRINTF_ARG(listener->global_identifier)); /* Make sure this is set correctly */ channel_mark_incoming(chan); - listener->u.listener.listener(listener, chan); + listener->listener(listener, chan); } SMARTLIST_FOREACH_END(chan); - smartlist_free(listener->u.listener.incoming_list); - listener->u.listener.incoming_list = NULL; + smartlist_free(listener->incoming_list); + listener->incoming_list = NULL; } /** @@ -1879,15 +2197,14 @@ channel_do_open_actions(channel_t *chan) time_t now = time(NULL); tor_assert(chan); - tor_assert(!(chan->is_listener)); started_here = channel_is_outgoing(chan); if (started_here) { circuit_build_times_network_is_live(&circ_times); - rep_hist_note_connect_succeeded(chan->u.cell_chan.identity_digest, now); + rep_hist_note_connect_succeeded(chan->identity_digest, now); if (entry_guard_register_connect_status( - chan->u.cell_chan.identity_digest, 1, 0, now) < 0) { + chan->identity_digest, 1, 0, now) < 0) { /* Close any circuits pending on this channel. We leave it in state * 'open' though, because it didn't actually *fail* -- we just * chose not to use it. */ @@ -1897,10 +2214,10 @@ channel_do_open_actions(channel_t *chan) circuit_n_chan_done(chan, 0); not_using = 1; } - router_set_status(chan->u.cell_chan.identity_digest, 1); + router_set_status(chan->identity_digest, 1); } else { /* only report it to the geoip module if it's not a known router */ - if (!router_get_by_id_digest(chan->u.cell_chan.identity_digest)) { + if (!router_get_by_id_digest(chan->identity_digest)) { if (channel_get_addr_if_possible(chan, &remote_addr)) { geoip_note_client_seen(GEOIP_CLIENT_CONNECT, &remote_addr, now); @@ -1916,60 +2233,55 @@ channel_do_open_actions(channel_t *chan) * Queue an incoming channel on a listener * * Internal and subclass use only function to queue an incoming channel from - * a listening one. A subclass of channel_t should call this when a new + * a listener. A subclass of channel_listener_t should call this when a new * incoming channel is created. */ void -channel_queue_incoming(channel_t *listener, channel_t *incoming) +channel_listener_queue_incoming(channel_listener_t *listener, + channel_t *incoming) { int need_to_queue = 0; tor_assert(listener); - tor_assert(listener->is_listener); - tor_assert(listener->state == CHANNEL_STATE_LISTENING); + tor_assert(listener->state == CHANNEL_LISTENER_STATE_LISTENING); tor_assert(incoming); - tor_assert(!(incoming->is_listener)); - /* - * Other states are permitted because subclass might process activity - * on a channel at any time while it's queued, but a listener returning - * another listener makes no sense. - */ - tor_assert(incoming->state != CHANNEL_STATE_LISTENING); log_debug(LD_CHANNEL, - "Queueing incoming channel %p on listening channel %p", - incoming, listener); + "Queueing incoming channel %p (global ID " U64_FORMAT ") on " + "channel listener %p (global ID " U64_FORMAT ")", + incoming, U64_PRINTF_ARG(incoming->global_identifier), + listener, U64_PRINTF_ARG(listener->global_identifier)); /* Do we need to queue it, or can we just call the listener right away? */ - if (!(listener->u.listener.listener)) need_to_queue = 1; - if (listener->u.listener.incoming_list && - (smartlist_len(listener->u.listener.incoming_list) > 0)) + if (!(listener->listener)) need_to_queue = 1; + if (listener->incoming_list && + (smartlist_len(listener->incoming_list) > 0)) need_to_queue = 1; /* If we need to queue and have no queue, create one */ - if (need_to_queue && !(listener->u.listener.incoming_list)) { - listener->u.listener.incoming_list = smartlist_new(); + if (need_to_queue && !(listener->incoming_list)) { + listener->incoming_list = smartlist_new(); } /* Bump the counter and timestamp it */ - channel_timestamp_active(listener); - channel_timestamp_accepted(listener); - ++(listener->u.listener.n_accepted); + channel_listener_timestamp_active(listener); + channel_listener_timestamp_accepted(listener); + ++(listener->n_accepted); /* If we don't need to queue, process it right away */ if (!need_to_queue) { - tor_assert(listener->u.listener.listener); - listener->u.listener.listener(listener, incoming); + tor_assert(listener->listener); + listener->listener(listener, incoming); } /* * Otherwise, we need to queue; queue and then process the queue if * we can. */ else { - tor_assert(listener->u.listener.incoming_list); - smartlist_add(listener->u.listener.incoming_list, incoming); - if (listener->u.listener.listener) channel_process_incoming(listener); + tor_assert(listener->incoming_list); + smartlist_add(listener->incoming_list, incoming); + if (listener->listener) channel_listener_process_incoming(listener); } } @@ -1984,7 +2296,6 @@ void channel_process_cells(channel_t *chan) { tor_assert(chan); - tor_assert(!(chan->is_listener)); tor_assert(chan->state == CHANNEL_STATE_CLOSING || chan->state == CHANNEL_STATE_MAINT || chan->state == CHANNEL_STATE_OPEN); @@ -1994,40 +2305,44 @@ channel_process_cells(channel_t *chan) chan); /* Nothing we can do if we have no registered cell handlers */ - if (!(chan->u.cell_chan.cell_handler || - chan->u.cell_chan.var_cell_handler)) return; + if (!(chan->cell_handler || + chan->var_cell_handler)) return; /* Nothing we can do if we have no cells */ - if (!(chan->u.cell_chan.incoming_queue)) return; + if (!(chan->incoming_queue)) return; /* * Process cells until we're done or find one we have no current handler * for. */ - SMARTLIST_FOREACH_BEGIN(chan->u.cell_chan.incoming_queue, + SMARTLIST_FOREACH_BEGIN(chan->incoming_queue, cell_queue_entry_t *, q) { tor_assert(q); tor_assert(q->type == CELL_QUEUE_FIXED || q->type == CELL_QUEUE_VAR); if (q->type == CELL_QUEUE_FIXED && - chan->u.cell_chan.cell_handler) { + chan->cell_handler) { /* Handle a fixed-length cell */ tor_assert(q->u.fixed.cell); log_debug(LD_CHANNEL, - "Processing incoming cell_t %p for channel %p", - q->u.fixed.cell, chan); - chan->u.cell_chan.cell_handler(chan, q->u.fixed.cell); - SMARTLIST_DEL_CURRENT(chan->u.cell_chan.incoming_queue, q); + "Processing incoming cell_t %p for channel %p (global ID " + U64_FORMAT ")", + q->u.fixed.cell, chan, + U64_PRINTF_ARG(chan->global_identifier)); + chan->cell_handler(chan, q->u.fixed.cell); + SMARTLIST_DEL_CURRENT(chan->incoming_queue, q); tor_free(q); } else if (q->type == CELL_QUEUE_VAR && - chan->u.cell_chan.var_cell_handler) { + chan->var_cell_handler) { /* Handle a variable-length cell */ tor_assert(q->u.var.var_cell); log_debug(LD_CHANNEL, - "Processing incoming var_cell_t %p for channel %p", - q->u.var.var_cell, chan); - chan->u.cell_chan.var_cell_handler(chan, q->u.var.var_cell); - SMARTLIST_DEL_CURRENT(chan->u.cell_chan.incoming_queue, q); + "Processing incoming var_cell_t %p for channel %p (global ID " + U64_FORMAT ")", + q->u.var.var_cell, chan, + U64_PRINTF_ARG(chan->global_identifier)); + chan->var_cell_handler(chan, q->u.var.var_cell); + SMARTLIST_DEL_CURRENT(chan->incoming_queue, q); tor_free(q); } else { /* Can't handle this one */ @@ -2036,9 +2351,9 @@ channel_process_cells(channel_t *chan) } SMARTLIST_FOREACH_END(q); /* If the list is empty, free it */ - if (smartlist_len(chan->u.cell_chan.incoming_queue) == 0 ) { - smartlist_free(chan->u.cell_chan.incoming_queue); - chan->u.cell_chan.incoming_queue = NULL; + if (smartlist_len(chan->incoming_queue) == 0 ) { + smartlist_free(chan->incoming_queue); + chan->incoming_queue = NULL; } } @@ -2056,46 +2371,49 @@ channel_queue_cell(channel_t *chan, cell_t *cell) cell_queue_entry_t *q; tor_assert(chan); - tor_assert(!(chan->is_listener)); tor_assert(cell); tor_assert(chan->state == CHANNEL_STATE_OPEN); /* Do we need to queue it, or can we just call the handler right away? */ - if (!(chan->u.cell_chan.cell_handler)) need_to_queue = 1; - if (chan->u.cell_chan.incoming_queue && - (smartlist_len(chan->u.cell_chan.incoming_queue) > 0)) + if (!(chan->cell_handler)) need_to_queue = 1; + if (chan->incoming_queue && + (smartlist_len(chan->incoming_queue) > 0)) need_to_queue = 1; /* If we need to queue and have no queue, create one */ - if (need_to_queue && !(chan->u.cell_chan.incoming_queue)) { - chan->u.cell_chan.incoming_queue = smartlist_new(); + if (need_to_queue && !(chan->incoming_queue)) { + chan->incoming_queue = smartlist_new(); } /* Timestamp for receiving */ channel_timestamp_recv(chan); /* Update the counter */ - ++(chan->u.cell_chan.n_cells_recved); + ++(chan->n_cells_recved); /* If we don't need to queue we can just call cell_handler */ if (!need_to_queue) { - tor_assert(chan->u.cell_chan.cell_handler); + tor_assert(chan->cell_handler); log_debug(LD_CHANNEL, - "Directly handling incoming cell_t %p for channel %p", - cell, chan); - chan->u.cell_chan.cell_handler(chan, cell); + "Directly handling incoming cell_t %p for channel %p " + "(global ID " U64_FORMAT ")", + cell, chan, + U64_PRINTF_ARG(chan->global_identifier)); + chan->cell_handler(chan, cell); } else { /* Otherwise queue it and then process the queue if possible. */ - tor_assert(chan->u.cell_chan.incoming_queue); + tor_assert(chan->incoming_queue); q = tor_malloc(sizeof(*q)); q->type = CELL_QUEUE_FIXED; q->u.fixed.cell = cell; log_debug(LD_CHANNEL, - "Queueing incoming cell_t %p for channel %p", - cell, chan); - smartlist_add(chan->u.cell_chan.incoming_queue, q); - if (chan->u.cell_chan.cell_handler || - chan->u.cell_chan.var_cell_handler) { + "Queueing incoming cell_t %p for channel %p " + "(global ID " U64_FORMAT ")", + cell, chan, + U64_PRINTF_ARG(chan->global_identifier)); + smartlist_add(chan->incoming_queue, q); + if (chan->cell_handler || + chan->var_cell_handler) { channel_process_cells(chan); } } @@ -2115,46 +2433,49 @@ channel_queue_var_cell(channel_t *chan, var_cell_t *var_cell) cell_queue_entry_t *q; tor_assert(chan); - tor_assert(!(chan->is_listener)); tor_assert(var_cell); tor_assert(chan->state == CHANNEL_STATE_OPEN); /* Do we need to queue it, or can we just call the handler right away? */ - if (!(chan->u.cell_chan.var_cell_handler)) need_to_queue = 1; - if (chan->u.cell_chan.incoming_queue && - (smartlist_len(chan->u.cell_chan.incoming_queue) > 0)) + if (!(chan->var_cell_handler)) need_to_queue = 1; + if (chan->incoming_queue && + (smartlist_len(chan->incoming_queue) > 0)) need_to_queue = 1; /* If we need to queue and have no queue, create one */ - if (need_to_queue && !(chan->u.cell_chan.incoming_queue)) { - chan->u.cell_chan.incoming_queue = smartlist_new(); + if (need_to_queue && !(chan->incoming_queue)) { + chan->incoming_queue = smartlist_new(); } /* Timestamp for receiving */ channel_timestamp_recv(chan); /* Update the counter */ - ++(chan->u.cell_chan.n_cells_recved); + ++(chan->n_cells_recved); /* If we don't need to queue we can just call cell_handler */ if (!need_to_queue) { - tor_assert(chan->u.cell_chan.var_cell_handler); + tor_assert(chan->var_cell_handler); log_debug(LD_CHANNEL, - "Directly handling incoming var_cell_t %p for channel %p", - var_cell, chan); - chan->u.cell_chan.var_cell_handler(chan, var_cell); + "Directly handling incoming var_cell_t %p for channel %p " + "(global ID " U64_FORMAT ")", + var_cell, chan, + U64_PRINTF_ARG(chan->global_identifier)); + chan->var_cell_handler(chan, var_cell); } else { /* Otherwise queue it and then process the queue if possible. */ - tor_assert(chan->u.cell_chan.incoming_queue); + tor_assert(chan->incoming_queue); q = tor_malloc(sizeof(*q)); q->type = CELL_QUEUE_VAR; q->u.var.var_cell = var_cell; log_debug(LD_CHANNEL, - "Queueing incoming var_cell_t %p for channel %p", - var_cell, chan); - smartlist_add(chan->u.cell_chan.incoming_queue, q); - if (chan->u.cell_chan.cell_handler || - chan->u.cell_chan.var_cell_handler) { + "Queueing incoming var_cell_t %p for channel %p " + "(global ID " U64_FORMAT ")", + var_cell, chan, + U64_PRINTF_ARG(chan->global_identifier)); + smartlist_add(chan->incoming_queue, q); + if (chan->cell_handler || + chan->var_cell_handler) { channel_process_cells(chan); } } @@ -2174,13 +2495,16 @@ channel_send_destroy(circid_t circ_id, channel_t *chan, int reason) cell_t cell; tor_assert(chan); - tor_assert(!(chan->is_listener)); memset(&cell, 0, sizeof(cell_t)); cell.circ_id = circ_id; cell.command = CELL_DESTROY; cell.payload[0] = (uint8_t) reason; - log_debug(LD_OR,"Sending destroy (circID %d).", circ_id); + log_debug(LD_OR, + "Sending destroy (circID %d) on channel %p " + "(global ID " U64_FORMAT ")", + circ_id, chan, + U64_PRINTF_ARG(chan->global_identifier)); channel_write_cell(chan, &cell); @@ -2202,23 +2526,52 @@ channel_dumpstats(int severity) "Dumping statistics about %d channels:", smartlist_len(all_channels)); log(severity, LD_GENERAL, - "%d are active, %d are listeners, and %d are done and " - "waiting for cleanup", + "%d are active, and %d are done and waiting for cleanup", (active_channels != NULL) ? smartlist_len(active_channels) : 0, - (listening_channels != NULL) ? - smartlist_len(listening_channels) : 0, (finished_channels != NULL) ? smartlist_len(finished_channels) : 0); - SMARTLIST_FOREACH(all_channels, channel_t *, chan, - channel_dump_statistics(chan, severity)); + SMARTLIST_FOREACH(all_channels, channel_t *, chan, + channel_dump_statistics(chan, severity)); + + log(severity, LD_GENERAL, + "Done spamming about channels now"); + } else { + log(severity, LD_GENERAL, + "No channels to dump"); + } +} + +/** + * Dump channel listener statistics to the log + * + * This is called from dumpstats() in main.c and spams the log with + * statistics on channel listeners. + */ + +void +channel_listener_dumpstats(int severity) +{ + if (all_listeners && smartlist_len(all_listeners) > 0) { + log(severity, LD_GENERAL, + "Dumping statistics about %d channel listeners:", + smartlist_len(all_listeners)); + log(severity, LD_GENERAL, + "%d are active and %d are done and waiting for cleanup", + (active_listeners != NULL) ? + smartlist_len(active_listeners) : 0, + (finished_listeners != NULL) ? + smartlist_len(finished_listeners) : 0); + + SMARTLIST_FOREACH(all_listeners, channel_listener_t *, chan_l, + channel_listener_dump_statistics(chan_l, severity)); log(severity, LD_GENERAL, - "Done spamming about channels now"); + "Done spamming about channel listeners now"); } else { log(severity, LD_GENERAL, - "No channels to dump"); + "No channel listeners to dump"); } } @@ -2250,6 +2603,91 @@ channel_run_cleanup(void) } /** + * Clean up channel listeners + * + * This gets called periodically from run_scheduled_events() in main.c; + * it cleans up after closed channel listeners. + */ + +void +channel_listener_run_cleanup(void) +{ + channel_listener_t *tmp = NULL; + + /* Check if we need to do anything */ + if (!finished_listeners || smartlist_len(finished_listeners) == 0) return; + + /* Iterate through finished_channels and get rid of them */ + SMARTLIST_FOREACH_BEGIN(finished_listeners, channel_listener_t *, curr) { + tmp = curr; + /* Remove it from the list */ + SMARTLIST_DEL_CURRENT(finished_listeners, curr); + /* Also unregister it */ + channel_listener_unregister(tmp); + /* ... and free it */ + channel_listener_free(tmp); + } SMARTLIST_FOREACH_END(curr); +} + +/** + * Free a list of channels for channel_free_all() + */ + +static void +channel_free_list(smartlist_t *channels, int mark_for_close) +{ + if (!channels) return; + + SMARTLIST_FOREACH_BEGIN(channels, channel_t *, curr) { + /* Deregister and free it */ + tor_assert(curr); + log_debug(LD_CHANNEL, + "Cleaning up channel %p (global ID " U64_FORMAT ") " + "in state %s (%d)", + curr, U64_PRINTF_ARG(curr->global_identifier), + channel_state_to_string(curr->state), curr->state); + channel_unregister(curr); + if (mark_for_close) { + if (!(curr->state == CHANNEL_STATE_CLOSING || + curr->state == CHANNEL_STATE_CLOSED || + curr->state == CHANNEL_STATE_ERROR)) { + channel_mark_for_close(curr); + } + channel_force_free(curr); + } else channel_free(curr); + } SMARTLIST_FOREACH_END(curr); +} + +/** + * Free a list of channel listeners for channel_free_all() + */ + +static void +channel_listener_free_list(smartlist_t *listeners, int mark_for_close) +{ + if (!listeners) return; + + SMARTLIST_FOREACH_BEGIN(listeners, channel_listener_t *, curr) { + /* Deregister and free it */ + tor_assert(curr); + log_debug(LD_CHANNEL, + "Cleaning up channel listener %p (global ID " U64_FORMAT ") " + "in state %s (%d)", + curr, U64_PRINTF_ARG(curr->global_identifier), + channel_listener_state_to_string(curr->state), curr->state); + channel_listener_unregister(curr); + if (mark_for_close) { + if (!(curr->state == CHANNEL_LISTENER_STATE_CLOSING || + curr->state == CHANNEL_LISTENER_STATE_CLOSED || + curr->state == CHANNEL_LISTENER_STATE_ERROR)) { + channel_listener_mark_for_close(curr); + } + channel_listener_force_free(curr); + } else channel_listener_free(curr); + } SMARTLIST_FOREACH_END(curr); +} + +/** * Close all channels and free everything * * This gets called from tor_free_all() in main.c to clean up on exit. @@ -2266,91 +2704,46 @@ channel_free_all(void) /* First, let's go for finished channels */ if (finished_channels) { - SMARTLIST_FOREACH_BEGIN(finished_channels, channel_t *, curr) { - /* Deregister and free it */ - tor_assert(curr); - log_debug(LD_CHANNEL, - "Cleaning up finished channel %p (ID " U64_FORMAT ") " - "in state %s (%d)", - curr, U64_PRINTF_ARG(curr->global_identifier), - channel_state_to_string(curr->state), curr->state); - channel_unregister(curr); - channel_free(curr); - } SMARTLIST_FOREACH_END(curr); - + channel_free_list(finished_channels, 0); smartlist_free(finished_channels); finished_channels = NULL; } - /* Now the listeners */ - if (listening_channels) { - SMARTLIST_FOREACH_BEGIN(listening_channels, channel_t *, curr) { - /* Close, deregister and free it */ - tor_assert(curr); - log_debug(LD_CHANNEL, - "Cleaning up listening channel %p (ID " U64_FORMAT ") " - "in state %s (%d)", - curr, U64_PRINTF_ARG(curr->global_identifier), - channel_state_to_string(curr->state), curr->state); - /* - * We have to unregister first so we don't put it in finished_channels - * and allocate that again on close. - */ - channel_unregister(curr); - channel_mark_for_close(curr); - channel_force_free(curr); - } SMARTLIST_FOREACH_END(curr); - - smartlist_free(listening_channels); - listening_channels = NULL; + /* Now the finished listeners */ + if (finished_listeners) { + channel_listener_free_list(finished_listeners, 0); + smartlist_free(finished_listeners); + finished_listeners = NULL; } /* Now all active channels */ if (active_channels) { - SMARTLIST_FOREACH_BEGIN(active_channels, channel_t *, curr) { - /* Close, deregister and free it */ - tor_assert(curr); - log_debug(LD_CHANNEL, - "Cleaning up active channel %p (ID " U64_FORMAT ") " - "in state %s (%d)", - curr, U64_PRINTF_ARG(curr->global_identifier), - channel_state_to_string(curr->state), curr->state); - /* - * We have to unregister first so we don't put it in finished_channels - * and allocate that again on close. - */ - channel_unregister(curr); - channel_mark_for_close(curr); - channel_force_free(curr); - } SMARTLIST_FOREACH_END(curr); - + channel_free_list(active_channels, 1); smartlist_free(active_channels); active_channels = NULL; } + /* Now all active listeners */ + if (active_listeners) { + channel_listener_free_list(active_listeners, 1); + smartlist_free(active_listeners); + active_listeners = NULL; + } + /* Now all channels, in case any are left over */ if (all_channels) { - SMARTLIST_FOREACH_BEGIN(all_channels, channel_t *, curr) { - /* Close, deregister and free it */ - tor_assert(curr); - log_debug(LD_CHANNEL, - "Cleaning up leftover channel %p (ID " U64_FORMAT ") " - "in state %s (%d)", - curr, U64_PRINTF_ARG(curr->global_identifier), - channel_state_to_string(curr->state), curr->state); - channel_unregister(curr); - if (!(curr->state == CHANNEL_STATE_CLOSING || - curr->state == CHANNEL_STATE_CLOSED || - curr->state == CHANNEL_STATE_ERROR)) { - channel_mark_for_close(curr); - } - channel_force_free(curr); - } SMARTLIST_FOREACH_END(curr); - + channel_free_list(all_channels, 1); smartlist_free(all_channels); all_channels = NULL; } + /* Now all listeners, in case any are left over */ + if (all_listeners) { + channel_listener_free_list(all_listeners, 1); + smartlist_free(all_listeners); + all_listeners = NULL; + } + /* Now free channel_identity_map */ if (channel_identity_map) { log_debug(LD_CHANNEL, @@ -2409,8 +2802,6 @@ channel_is_better(time_t now, channel_t *a, channel_t *b, tor_assert(a); tor_assert(b); - tor_assert(!(a->is_listener)); - tor_assert(!(b->is_listener)); /* Check if one is canonical and the other isn't first */ a_is_canonical = channel_is_canonical(a); @@ -2426,8 +2817,8 @@ channel_is_better(time_t now, channel_t *a, channel_t *b, * one that has no circuits is in its grace period. */ - a_has_circs = (a->u.cell_chan.n_circuits > 0); - b_has_circs = (b->u.cell_chan.n_circuits > 0); + a_has_circs = (a->n_circuits > 0); + b_has_circs = (b->n_circuits > 0); a_grace = (forgive_new_connections && (now < channel_when_created(a) + NEW_CHAN_GRACE_PERIOD)); b_grace = (forgive_new_connections && @@ -2479,14 +2870,12 @@ channel_get_for_extend(const char *digest, * iteration. */ for (; chan; chan = channel_next_with_digest(chan)) { - tor_assert(!(chan->is_listener)); - tor_assert(tor_memeq(chan->u.cell_chan.identity_digest, + tor_assert(tor_memeq(chan->identity_digest, digest, DIGEST_LEN)); if (chan->state == CHANNEL_STATE_CLOSING || chan->state == CHANNEL_STATE_CLOSED || - chan->state == CHANNEL_STATE_ERROR || - chan->state == CHANNEL_STATE_LISTENING) + chan->state == CHANNEL_STATE_ERROR) continue; /* Never return a channel on which the other end appears to be @@ -2562,7 +2951,7 @@ channel_get_for_extend(const char *digest, } /** - * Describe the transport subclass + * Describe the transport subclass for a channel * * Invoke a method to get a string description of the lower-layer * transport for this channel. @@ -2578,6 +2967,22 @@ channel_describe_transport(channel_t *chan) } /** + * Describe the transport subclass for a channel listener + * + * Invoke a method to get a string description of the lower-layer + * transport for this channel listener. + */ + +const char * +channel_listener_describe_transport(channel_listener_t *chan_l) +{ + tor_assert(chan_l); + tor_assert(chan_l->describe_transport); + + return chan_l->describe_transport(chan_l); +} + +/** * Dump channel statistics * * Dump statistics for one channel to the log @@ -2598,13 +3003,10 @@ channel_dump_statistics(channel_t *chan, int severity) log(severity, LD_GENERAL, "Channel " U64_FORMAT " (at %p) with transport %s is in state " - "%s (%d) and %s", + "%s (%d)", U64_PRINTF_ARG(chan->global_identifier), chan, channel_describe_transport(chan), - channel_state_to_string(chan->state), chan->state, - chan->is_listener ? - "listens for incoming connections" : - "transports cells"); + channel_state_to_string(chan->state), chan->state); log(severity, LD_GENERAL, " * Channel " U64_FORMAT " was created at " U64_FORMAT " (" U64_FORMAT " seconds ago) " @@ -2614,204 +3016,239 @@ channel_dump_statistics(channel_t *chan, int severity) U64_PRINTF_ARG(now - chan->timestamp_created), U64_PRINTF_ARG(chan->timestamp_active), U64_PRINTF_ARG(now - chan->timestamp_active)); - if (chan->is_listener) { + + /* Handle digest and nickname */ + if (!tor_digest_is_zero(chan->identity_digest)) { + if (chan->nickname) { + log(severity, LD_GENERAL, + " * Channel " U64_FORMAT " says it is connected " + "to an OR with digest %s and nickname %s", + U64_PRINTF_ARG(chan->global_identifier), + hex_str(chan->identity_digest, DIGEST_LEN), + chan->nickname); + } else { + log(severity, LD_GENERAL, + " * Channel " U64_FORMAT " says it is connected " + "to an OR with digest %s and no known nickname", + U64_PRINTF_ARG(chan->global_identifier), + hex_str(chan->identity_digest, DIGEST_LEN)); + } + } else { + if (chan->nickname) { + log(severity, LD_GENERAL, + " * Channel " U64_FORMAT " does not know the digest" + " of the OR it is connected to, but reports its nickname is %s", + U64_PRINTF_ARG(chan->global_identifier), + chan->nickname); + } else { + log(severity, LD_GENERAL, + " * Channel " U64_FORMAT " does not know the digest" + " or the nickname of the OR it is connected to", + U64_PRINTF_ARG(chan->global_identifier)); + } + } + + /* Handle remote address and descriptions */ + have_remote_addr = channel_get_addr_if_possible(chan, &remote_addr); + if (have_remote_addr) { + remote_addr_str = tor_dup_addr(&remote_addr); log(severity, LD_GENERAL, - " * Listener channel " U64_FORMAT " last accepted an incoming " - "channel at " U64_FORMAT " (" U64_FORMAT " seconds ago) " - "and has accepted " U64_FORMAT " channels in total", + " * Channel " U64_FORMAT " says its remote address" + " is %s, and gives a canonical description of \"%s\" and an " + "actual description of \"%s\"", + U64_PRINTF_ARG(chan->global_identifier), + remote_addr_str, + channel_get_canonical_remote_descr(chan), + channel_get_actual_remote_descr(chan)); + tor_free(remote_addr_str); + } else { + log(severity, LD_GENERAL, + " * Channel " U64_FORMAT " does not know its remote " + "address, but gives a canonical description of \"%s\" and an " + "actual description of \"%s\"", U64_PRINTF_ARG(chan->global_identifier), - U64_PRINTF_ARG(chan->u.listener.timestamp_accepted), - U64_PRINTF_ARG(now - chan->u.listener.timestamp_accepted), - U64_PRINTF_ARG(chan->u.listener.n_accepted)); + channel_get_canonical_remote_descr(chan), + channel_get_actual_remote_descr(chan)); + } - /* - * If it's sensible to do so, get the rate of incoming channels on this - * listener - */ - if (now > chan->timestamp_created && - chan->timestamp_created > 0 && - chan->u.listener.n_accepted > 0) { - avg = (double)(chan->u.listener.n_accepted) / age; + /* Handle marks */ + log(severity, LD_GENERAL, + " * Channel " U64_FORMAT " has these marks: %s %s %s " + "%s %s %s", + U64_PRINTF_ARG(chan->global_identifier), + channel_is_bad_for_new_circs(chan) ? + "bad_for_new_circs" : "!bad_for_new_circs", + channel_is_canonical(chan) ? + "canonical" : "!canonical", + channel_is_canonical_is_reliable(chan) ? + "is_canonical_is_reliable" : + "!is_canonical_is_reliable", + channel_is_client(chan) ? + "client" : "!client", + channel_is_local(chan) ? + "local" : "!local", + channel_is_incoming(chan) ? + "incoming" : "outgoing"); + + /* Describe queues */ + log(severity, LD_GENERAL, + " * Channel " U64_FORMAT " has %d queued incoming cells" + " and %d queued outgoing cells", + U64_PRINTF_ARG(chan->global_identifier), + (chan->incoming_queue != NULL) ? + smartlist_len(chan->incoming_queue) : 0, + (chan->outgoing_queue != NULL) ? + smartlist_len(chan->outgoing_queue) : 0); + + /* Describe circuits */ + log(severity, LD_GENERAL, + " * Channel " U64_FORMAT " has %d active circuits out of" + " %d in total", + U64_PRINTF_ARG(chan->global_identifier), + (chan->active_circuit_pqueue != NULL) ? + smartlist_len(chan->active_circuit_pqueue) : 0, + chan->n_circuits); + + /* Describe timestamps */ + log(severity, LD_GENERAL, + " * Channel " U64_FORMAT " was last used by a " + "client at " U64_FORMAT " (" U64_FORMAT " seconds ago)", + U64_PRINTF_ARG(chan->global_identifier), + U64_PRINTF_ARG(chan->timestamp_client), + U64_PRINTF_ARG(now - chan->timestamp_client)); + log(severity, LD_GENERAL, + " * Channel " U64_FORMAT " was last drained at " + U64_FORMAT " (" U64_FORMAT " seconds ago)", + U64_PRINTF_ARG(chan->global_identifier), + U64_PRINTF_ARG(chan->timestamp_drained), + U64_PRINTF_ARG(now - chan->timestamp_drained)); + log(severity, LD_GENERAL, + " * Channel " U64_FORMAT " last received a cell " + "at " U64_FORMAT " (" U64_FORMAT " seconds ago)", + U64_PRINTF_ARG(chan->global_identifier), + U64_PRINTF_ARG(chan->timestamp_recv), + U64_PRINTF_ARG(now - chan->timestamp_recv)); + log(severity, LD_GENERAL, + " * Channel " U64_FORMAT " last trasmitted a cell " + "at " U64_FORMAT " (" U64_FORMAT " seconds ago)", + U64_PRINTF_ARG(chan->global_identifier), + U64_PRINTF_ARG(chan->timestamp_xmit), + U64_PRINTF_ARG(now - chan->timestamp_xmit)); + + /* Describe counters and rates */ + log(severity, LD_GENERAL, + " * Channel " U64_FORMAT " has received " + U64_FORMAT " cells and transmitted " U64_FORMAT, + U64_PRINTF_ARG(chan->global_identifier), + U64_PRINTF_ARG(chan->n_cells_recved), + U64_PRINTF_ARG(chan->n_cells_xmitted)); + if (now > chan->timestamp_created && + chan->timestamp_created > 0) { + if (chan->n_cells_recved > 0) { + avg = (double)(chan->n_cells_recved) / age; if (avg >= 1.0) { log(severity, LD_GENERAL, - " * Listener channel " U64_FORMAT " has averaged %f incoming " - "channels per second", + " * Channel " U64_FORMAT " has averaged %f " + "cells received per second", U64_PRINTF_ARG(chan->global_identifier), avg); } else if (avg >= 0.0) { interval = 1.0 / avg; log(severity, LD_GENERAL, - " * Listener channel " U64_FORMAT " has averaged %f seconds " - "between incoming channels", + " * Channel " U64_FORMAT " has averaged %f " + "seconds between received cells", U64_PRINTF_ARG(chan->global_identifier), interval); } } - } else { - /* Handle digest and nickname */ - if (!tor_digest_is_zero(chan->u.cell_chan.identity_digest)) { - if (chan->u.cell_chan.nickname) { - log(severity, LD_GENERAL, - " * Cell-bearing channel " U64_FORMAT " says it is connected " - "to an OR with digest %s and nickname %s", - U64_PRINTF_ARG(chan->global_identifier), - hex_str(chan->u.cell_chan.identity_digest, DIGEST_LEN), - chan->u.cell_chan.nickname); - } else { - log(severity, LD_GENERAL, - " * Cell-bearing channel " U64_FORMAT " says it is connected " - "to an OR with digest %s and no known nickname", - U64_PRINTF_ARG(chan->global_identifier), - hex_str(chan->u.cell_chan.identity_digest, DIGEST_LEN)); - } - } else { - if (chan->u.cell_chan.nickname) { + if (chan->n_cells_xmitted > 0) { + avg = (double)(chan->n_cells_xmitted) / age; + if (avg >= 1.0) { log(severity, LD_GENERAL, - " * Cell-bearing channel " U64_FORMAT " does not know the digest" - " of the OR it is connected to, but reports its nickname is %s", - U64_PRINTF_ARG(chan->global_identifier), - chan->u.cell_chan.nickname); - } else { + " * Channel " U64_FORMAT " has averaged %f " + "cells transmitted per second", + U64_PRINTF_ARG(chan->global_identifier), avg); + } else if (avg >= 0.0) { + interval = 1.0 / avg; log(severity, LD_GENERAL, - " * Cell-bearing channel " U64_FORMAT " does not know the digest" - " or the nickname of the OR it is connected to", - U64_PRINTF_ARG(chan->global_identifier)); + " * Channel " U64_FORMAT " has averaged %f " + "seconds between transmitted cells", + U64_PRINTF_ARG(chan->global_identifier), interval); } } + } - /* Handle remote address and descriptions */ - have_remote_addr = channel_get_addr_if_possible(chan, &remote_addr); - if (have_remote_addr) { - remote_addr_str = tor_dup_addr(&remote_addr); - log(severity, LD_GENERAL, - " * Cell-bearing channel " U64_FORMAT " says its remote address" - " is %s, and gives a canonical description of \"%s\" and an " - "actual description of \"%s\"", - U64_PRINTF_ARG(chan->global_identifier), - remote_addr_str, - channel_get_canonical_remote_descr(chan), - channel_get_actual_remote_descr(chan)); - tor_free(remote_addr_str); - } else { - log(severity, LD_GENERAL, - " * Cell-bearing channel " U64_FORMAT " does not know its remote " - "address, but gives a canonical description of \"%s\" and an " - "actual description of \"%s\"", - U64_PRINTF_ARG(chan->global_identifier), - channel_get_canonical_remote_descr(chan), - channel_get_actual_remote_descr(chan)); - } + /* Dump anything the lower layer has to say */ + channel_dump_transport_statistics(chan, severity); +} - /* Handle marks */ - log(severity, LD_GENERAL, - " * Cell-bearing channel " U64_FORMAT " has these marks: %s %s %s " - "%s %s %s", - U64_PRINTF_ARG(chan->global_identifier), - channel_is_bad_for_new_circs(chan) ? - "bad_for_new_circs" : "!bad_for_new_circs", - channel_is_canonical(chan) ? - "canonical" : "!canonical", - channel_is_canonical_is_reliable(chan) ? - "is_canonical_is_reliable" : - "!is_canonical_is_reliable", - channel_is_client(chan) ? - "client" : "!client", - channel_is_local(chan) ? - "local" : "!local", - channel_is_incoming(chan) ? - "incoming" : "outgoing"); - - /* Describe queues */ - log(severity, LD_GENERAL, - " * Cell-bearing channel " U64_FORMAT " has %d queued incoming cells" - " and %d queued outgoing cells", - U64_PRINTF_ARG(chan->global_identifier), - (chan->u.cell_chan.incoming_queue != NULL) ? - smartlist_len(chan->u.cell_chan.incoming_queue) : 0, - (chan->u.cell_chan.outgoing_queue != NULL) ? - smartlist_len(chan->u.cell_chan.outgoing_queue) : 0); +/** + * Dump channel listener statistics + * + * Dump statistics for one channel listener to the log + */ - /* Describe circuits */ - log(severity, LD_GENERAL, - " * Cell-bearing channel " U64_FORMAT " has %d active circuits out of" - " %d in total", - U64_PRINTF_ARG(chan->global_identifier), - (chan->u.cell_chan.active_circuit_pqueue != NULL) ? - smartlist_len(chan->u.cell_chan.active_circuit_pqueue) : 0, - chan->u.cell_chan.n_circuits); +void +channel_listener_dump_statistics(channel_listener_t *chan_l, int severity) +{ + double avg, interval, age; + time_t now = time(NULL); - /* Describe timestamps */ - log(severity, LD_GENERAL, - " * Cell-bearing channel " U64_FORMAT " was last used by a " - "client at " U64_FORMAT " (" U64_FORMAT " seconds ago)", - U64_PRINTF_ARG(chan->global_identifier), - U64_PRINTF_ARG(chan->u.cell_chan.timestamp_client), - U64_PRINTF_ARG(now - chan->u.cell_chan.timestamp_client)); - log(severity, LD_GENERAL, - " * Cell-bearing channel " U64_FORMAT " was last drained at " - U64_FORMAT " (" U64_FORMAT " seconds ago)", - U64_PRINTF_ARG(chan->global_identifier), - U64_PRINTF_ARG(chan->u.cell_chan.timestamp_drained), - U64_PRINTF_ARG(now - chan->u.cell_chan.timestamp_drained)); - log(severity, LD_GENERAL, - " * Cell-bearing channel " U64_FORMAT " last received a cell " - "at " U64_FORMAT " (" U64_FORMAT " seconds ago)", - U64_PRINTF_ARG(chan->global_identifier), - U64_PRINTF_ARG(chan->u.cell_chan.timestamp_recv), - U64_PRINTF_ARG(now - chan->u.cell_chan.timestamp_recv)); - log(severity, LD_GENERAL, - " * Cell-bearing channel " U64_FORMAT " last trasmitted a cell " - "at " U64_FORMAT " (" U64_FORMAT " seconds ago)", - U64_PRINTF_ARG(chan->global_identifier), - U64_PRINTF_ARG(chan->u.cell_chan.timestamp_xmit), - U64_PRINTF_ARG(now - chan->u.cell_chan.timestamp_xmit)); + tor_assert(chan_l); - /* Describe counters and rates */ - log(severity, LD_GENERAL, - " * Cell-bearing channel " U64_FORMAT " has received " - U64_FORMAT " cells and transmitted " U64_FORMAT, - U64_PRINTF_ARG(chan->global_identifier), - U64_PRINTF_ARG(chan->u.cell_chan.n_cells_recved), - U64_PRINTF_ARG(chan->u.cell_chan.n_cells_xmitted)); - if (now > chan->timestamp_created && - chan->timestamp_created > 0) { - if (chan->u.cell_chan.n_cells_recved > 0) { - avg = (double)(chan->u.cell_chan.n_cells_recved) / age; - if (avg >= 1.0) { - log(severity, LD_GENERAL, - " * Cell-bearing channel " U64_FORMAT " has averaged %f " - "cells received per second", - U64_PRINTF_ARG(chan->global_identifier), avg); - } else if (avg >= 0.0) { - interval = 1.0 / avg; - log(severity, LD_GENERAL, - " * Cell-bearing channel " U64_FORMAT " has averaged %f " - "seconds between received cells", - U64_PRINTF_ARG(chan->global_identifier), interval); - } - } - if (chan->u.cell_chan.n_cells_xmitted > 0) { - avg = (double)(chan->u.cell_chan.n_cells_xmitted) / age; - if (avg >= 1.0) { - log(severity, LD_GENERAL, - " * Cell-bearing channel " U64_FORMAT " has averaged %f " - "cells transmitted per second", - U64_PRINTF_ARG(chan->global_identifier), avg); - } else if (avg >= 0.0) { - interval = 1.0 / avg; - log(severity, LD_GENERAL, - " * Cell-bearing channel " U64_FORMAT " has averaged %f " - "seconds between transmitted cells", - U64_PRINTF_ARG(chan->global_identifier), interval); - } - } + age = (double)(now - chan_l->timestamp_created); + + log(severity, LD_GENERAL, + "Channel listener " U64_FORMAT " (at %p) with transport %s is in " + "state %s (%d)", + U64_PRINTF_ARG(chan_l->global_identifier), chan_l, + channel_listener_describe_transport(chan_l), + channel_listener_state_to_string(chan_l->state), chan_l->state); + log(severity, LD_GENERAL, + " * Channel listener " U64_FORMAT " was created at " U64_FORMAT + " (" U64_FORMAT " seconds ago) " + "and last active at " U64_FORMAT " (" U64_FORMAT " seconds ago)", + U64_PRINTF_ARG(chan_l->global_identifier), + U64_PRINTF_ARG(chan_l->timestamp_created), + U64_PRINTF_ARG(now - chan_l->timestamp_created), + U64_PRINTF_ARG(chan_l->timestamp_active), + U64_PRINTF_ARG(now - chan_l->timestamp_active)); + + log(severity, LD_GENERAL, + " * Channel listener " U64_FORMAT " last accepted an incoming " + "channel at " U64_FORMAT " (" U64_FORMAT " seconds ago) " + "and has accepted " U64_FORMAT " channels in total", + U64_PRINTF_ARG(chan_l->global_identifier), + U64_PRINTF_ARG(chan_l->timestamp_accepted), + U64_PRINTF_ARG(now - chan_l->timestamp_accepted), + U64_PRINTF_ARG(chan_l->n_accepted)); + + /* + * If it's sensible to do so, get the rate of incoming channels on this + * listener + */ + if (now > chan_l->timestamp_created && + chan_l->timestamp_created > 0 && + chan_l->n_accepted > 0) { + avg = (double)(chan_l->n_accepted) / age; + if (avg >= 1.0) { + log(severity, LD_GENERAL, + " * Channel listener " U64_FORMAT " has averaged %f incoming " + "channels per second", + U64_PRINTF_ARG(chan_l->global_identifier), avg); + } else if (avg >= 0.0) { + interval = 1.0 / avg; + log(severity, LD_GENERAL, + " * Channel listener " U64_FORMAT " has averaged %f seconds " + "between incoming channels", + U64_PRINTF_ARG(chan_l->global_identifier), interval); } } /* Dump anything the lower layer has to say */ - channel_dump_transport_statistics(chan, severity); + channel_listener_dump_transport_statistics(chan_l, severity); } /** - * Invoke transport-specific stats dump + * Invoke transport-specific stats dump for channel * * If there is a lower-layer statistics dump method, invoke it */ @@ -2825,6 +3262,21 @@ channel_dump_transport_statistics(channel_t *chan, int severity) } /** + * Invoke transport-specific stats dump for channel listener + * + * If there is a lower-layer statistics dump method, invoke it + */ + +void +channel_listener_dump_transport_statistics(channel_listener_t *chan_l, + int severity) +{ + tor_assert(chan_l); + + if (chan_l->dumpstats) chan_l->dumpstats(chan_l, severity); +} + +/** * Return text description of the remote endpoint * * This function return a test provided by the lower layer of the remote @@ -2836,11 +3288,10 @@ const char * channel_get_actual_remote_descr(channel_t *chan) { tor_assert(chan); - tor_assert(!(chan->is_listener)); - tor_assert(chan->u.cell_chan.get_remote_descr); + tor_assert(chan->get_remote_descr); /* Param 1 indicates the actual description */ - return chan->u.cell_chan.get_remote_descr(chan, 1); + return chan->get_remote_descr(chan, 1); } /** @@ -2855,11 +3306,10 @@ const char * channel_get_canonical_remote_descr(channel_t *chan) { tor_assert(chan); - tor_assert(!(chan->is_listener)); - tor_assert(chan->u.cell_chan.get_remote_descr); + tor_assert(chan->get_remote_descr); /* Param 0 indicates the canonicalized description */ - return chan->u.cell_chan.get_remote_descr(chan, 0); + return chan->get_remote_descr(chan, 0); } /** @@ -2873,11 +3323,10 @@ int channel_get_addr_if_possible(channel_t *chan, tor_addr_t *addr_out) { tor_assert(chan); - tor_assert(!(chan->is_listener)); tor_assert(addr_out); - if (chan->u.cell_chan.get_remote_addr) - return chan->u.cell_chan.get_remote_addr(chan, addr_out); + if (chan->get_remote_addr) + return chan->get_remote_addr(chan, addr_out); /* Else no support, method not implemented */ else return 0; } @@ -2895,15 +3344,14 @@ channel_has_queued_writes(channel_t *chan) int has_writes = 0; tor_assert(chan); - tor_assert(!(chan->is_listener)); - tor_assert(chan->u.cell_chan.has_queued_writes); + tor_assert(chan->has_queued_writes); - if (chan->u.cell_chan.outgoing_queue && - smartlist_len(chan->u.cell_chan.outgoing_queue) > 0) { + if (chan->outgoing_queue && + smartlist_len(chan->outgoing_queue) > 0) { has_writes = 1; } else { /* Check with the lower layer */ - has_writes = chan->u.cell_chan.has_queued_writes(chan); + has_writes = chan->has_queued_writes(chan); } return has_writes; @@ -2920,9 +3368,8 @@ int channel_is_bad_for_new_circs(channel_t *chan) { tor_assert(chan); - tor_assert(!(chan->is_listener)); - return chan->u.cell_chan.is_bad_for_new_circs; + return chan->is_bad_for_new_circs; } /** @@ -2935,9 +3382,8 @@ void channel_mark_bad_for_new_circs(channel_t *chan) { tor_assert(chan); - tor_assert(!(chan->is_listener)); - chan->u.cell_chan.is_bad_for_new_circs = 1; + chan->is_bad_for_new_circs = 1; } /** @@ -2952,9 +3398,8 @@ int channel_is_client(channel_t *chan) { tor_assert(chan); - tor_assert(!(chan->is_listener)); - return chan->u.cell_chan.is_client; + return chan->is_client; } /** @@ -2967,9 +3412,8 @@ void channel_mark_client(channel_t *chan) { tor_assert(chan); - tor_assert(!(chan->is_listener)); - chan->u.cell_chan.is_client = 1; + chan->is_client = 1; } /** @@ -2983,10 +3427,9 @@ int channel_is_canonical(channel_t *chan) { tor_assert(chan); - tor_assert(!(chan->is_listener)); - tor_assert(chan->u.cell_chan.is_canonical); + tor_assert(chan->is_canonical); - return chan->u.cell_chan.is_canonical(chan, 0); + return chan->is_canonical(chan, 0); } /** @@ -3000,10 +3443,9 @@ int channel_is_canonical_is_reliable(channel_t *chan) { tor_assert(chan); - tor_assert(!(chan->is_listener)); - tor_assert(chan->u.cell_chan.is_canonical); + tor_assert(chan->is_canonical); - return chan->u.cell_chan.is_canonical(chan, 1); + return chan->is_canonical(chan, 1); } /** @@ -3017,9 +3459,8 @@ int channel_is_incoming(channel_t *chan) { tor_assert(chan); - tor_assert(!(chan->is_listener)); - return chan->u.cell_chan.is_incoming; + return chan->is_incoming; } /** @@ -3033,9 +3474,8 @@ void channel_mark_incoming(channel_t *chan) { tor_assert(chan); - tor_assert(!(chan->is_listener)); - chan->u.cell_chan.is_incoming = 1; + chan->is_incoming = 1; } /** @@ -3052,9 +3492,8 @@ int channel_is_local(channel_t *chan) { tor_assert(chan); - tor_assert(!(chan->is_listener)); - return chan->u.cell_chan.is_local; + return chan->is_local; } /** @@ -3069,9 +3508,8 @@ void channel_mark_local(channel_t *chan) { tor_assert(chan); - tor_assert(!(chan->is_listener)); - chan->u.cell_chan.is_local = 1; + chan->is_local = 1; } /** @@ -3086,9 +3524,8 @@ int channel_is_outgoing(channel_t *chan) { tor_assert(chan); - tor_assert(!(chan->is_listener)); - return !(chan->u.cell_chan.is_incoming); + return !(chan->is_incoming); } /** @@ -3102,9 +3539,8 @@ void channel_mark_outgoing(channel_t *chan) { tor_assert(chan); - tor_assert(!(chan->is_listener)); - chan->u.cell_chan.is_incoming = 0; + chan->is_incoming = 0; } /********************* @@ -3112,7 +3548,7 @@ channel_mark_outgoing(channel_t *chan) ********************/ /** - * Update the created timestamp + * Update the created timestamp for a channel * * This updates the channel's created timestamp and should only be called * from channel_init(). @@ -3129,7 +3565,24 @@ channel_timestamp_created(channel_t *chan) } /** - * Update the last active timestamp. + * Update the created timestamp for a channel listener + * + * This updates the channel listener's created timestamp and should only be + * called from channel_init_listener(). + */ + +void +channel_listener_timestamp_created(channel_listener_t *chan_l) +{ + time_t now = time(NULL); + + tor_assert(chan_l); + + chan_l->timestamp_created = now; +} + +/** + * Update the last active timestamp for a channel * * This function updates the channel's last active timestamp; it should be * called by the lower layer whenever there is activity on the channel which @@ -3150,21 +3603,36 @@ channel_timestamp_active(channel_t *chan) } /** + * Update the last active timestamp for a channel listener + */ + +void +channel_listener_timestamp_active(channel_listener_t *chan_l) +{ + time_t now = time(NULL); + + tor_assert(chan_l); + + chan_l->timestamp_active = now; +} + +/** * Update the last accepted timestamp. * - * This function updates the channel's last accepted timestamp; it should be - * called whenever a new incoming channel is accepted on a listener. + * This function updates the channel listener's last accepted timestamp; it + * should be called whenever a new incoming channel is accepted on a + * listener. */ void -channel_timestamp_accepted(channel_t *chan) +channel_listener_timestamp_accepted(channel_listener_t *chan_l) { time_t now = time(NULL); - tor_assert(chan); - tor_assert(chan->is_listener); + tor_assert(chan_l); - chan->u.listener.timestamp_accepted = now; + chan_l->timestamp_active = now; + chan_l->timestamp_accepted = now; } /** @@ -3180,9 +3648,8 @@ channel_timestamp_client(channel_t *chan) time_t now = time(NULL); tor_assert(chan); - tor_assert(!(chan->is_listener)); - chan->u.cell_chan.timestamp_client = now; + chan->timestamp_client = now; } /** @@ -3198,11 +3665,10 @@ channel_timestamp_drained(channel_t *chan) time_t now = time(NULL); tor_assert(chan); - tor_assert(!(chan->is_listener)); chan->timestamp_active = now; - chan->u.cell_chan.timestamp_drained = now; - chan->u.cell_chan.timestamp_xmit = now; + chan->timestamp_drained = now; + chan->timestamp_xmit = now; } /** @@ -3218,10 +3684,9 @@ channel_timestamp_recv(channel_t *chan) time_t now = time(NULL); tor_assert(chan); - tor_assert(!(chan->is_listener)); chan->timestamp_active = now; - chan->u.cell_chan.timestamp_recv = now; + chan->timestamp_recv = now; } /** @@ -3236,10 +3701,9 @@ channel_timestamp_xmit(channel_t *chan) time_t now = time(NULL); tor_assert(chan); - tor_assert(!(chan->is_listener)); chan->timestamp_active = now; - chan->u.cell_chan.timestamp_xmit = now; + chan->timestamp_xmit = now; } /*************************************************************** @@ -3247,7 +3711,7 @@ channel_timestamp_xmit(channel_t *chan) **************************************************************/ /** - * Query created timestamp + * Query created timestamp for a channel */ time_t @@ -3259,7 +3723,19 @@ channel_when_created(channel_t *chan) } /** - * Query last active timestamp + * Query created timestamp for a channel listener + */ + +time_t +channel_listener_when_created(channel_listener_t *chan_l) +{ + tor_assert(chan_l); + + return chan_l->timestamp_created; +} + +/** + * Query last active timestamp for a channel */ time_t @@ -3271,16 +3747,27 @@ channel_when_last_active(channel_t *chan) } /** - * Query last accepted timestamp + * Query last active timestamp for a channel listener */ time_t -channel_when_last_accepted(channel_t *chan) +channel_listener_when_last_active(channel_listener_t *chan_l) { - tor_assert(chan); - tor_assert(chan->is_listener); + tor_assert(chan_l); + + return chan_l->timestamp_active; +} + +/** + * Query last accepted timestamp for a channel listener + */ + +time_t +channel_listener_when_last_accepted(channel_listener_t *chan_l) +{ + tor_assert(chan_l); - return chan->u.listener.timestamp_accepted; + return chan_l->timestamp_accepted; } /** @@ -3291,9 +3778,8 @@ time_t channel_when_last_client(channel_t *chan) { tor_assert(chan); - tor_assert(!(chan->is_listener)); - return chan->u.cell_chan.timestamp_client; + return chan->timestamp_client; } /** @@ -3304,9 +3790,8 @@ time_t channel_when_last_drained(channel_t *chan) { tor_assert(chan); - tor_assert(!(chan->is_listener)); - return chan->u.cell_chan.timestamp_drained; + return chan->timestamp_drained; } /** @@ -3317,9 +3802,8 @@ time_t channel_when_last_recv(channel_t *chan) { tor_assert(chan); - tor_assert(!(chan->is_listener)); - return chan->u.cell_chan.timestamp_recv; + return chan->timestamp_recv; } /** @@ -3330,9 +3814,8 @@ time_t channel_when_last_xmit(channel_t *chan) { tor_assert(chan); - tor_assert(!(chan->is_listener)); - return chan->u.cell_chan.timestamp_xmit; + return chan->timestamp_xmit; } /** @@ -3340,12 +3823,11 @@ channel_when_last_xmit(channel_t *chan) */ uint64_t -channel_count_accepted(channel_t *chan) +channel_listener_count_accepted(channel_listener_t *chan_l) { - tor_assert(chan); + tor_assert(chan_l); - if (chan->is_listener) return chan->u.listener.n_accepted; - else return 0; + return chan_l->n_accepted; } /** @@ -3357,8 +3839,7 @@ channel_count_recved(channel_t *chan) { tor_assert(chan); - if (!(chan->is_listener)) return chan->u.cell_chan.n_cells_recved; - else return 0; + return chan->n_cells_recved; } /** @@ -3370,8 +3851,7 @@ channel_count_xmitted(channel_t *chan) { tor_assert(chan); - if (!(chan->is_listener)) return chan->u.cell_chan.n_cells_xmitted; - else return 0; + return chan->n_cells_xmitted; } /** @@ -3385,11 +3865,10 @@ int channel_matches_extend_info(channel_t *chan, extend_info_t *extend_info) { tor_assert(chan); - tor_assert(!(chan->is_listener)); - tor_assert(chan->u.cell_chan.matches_extend_info); + tor_assert(chan->matches_extend_info); tor_assert(extend_info); - return chan->u.cell_chan.matches_extend_info(chan, extend_info); + return chan->matches_extend_info(chan, extend_info); } /** @@ -3404,11 +3883,10 @@ channel_matches_target_addr_for_extend(channel_t *chan, const tor_addr_t *target) { tor_assert(chan); - tor_assert(!(chan->is_listener)); - tor_assert(chan->u.cell_chan.matches_target); + tor_assert(chan->matches_target); tor_assert(target); - return chan->u.cell_chan.matches_target(chan, target); + return chan->matches_target(chan, target); } /** @@ -3425,7 +3903,6 @@ channel_set_circid_type(channel_t *chan, crypto_pk_t *identity_rcvd) crypto_pk_t *our_identity; tor_assert(chan); - tor_assert(!(chan->is_listener)); started_here = channel_is_outgoing(chan); our_identity = started_here ? @@ -3433,12 +3910,12 @@ channel_set_circid_type(channel_t *chan, crypto_pk_t *identity_rcvd) if (identity_rcvd) { if (crypto_pk_cmp_keys(our_identity, identity_rcvd) < 0) { - chan->u.cell_chan.circ_id_type = CIRC_ID_TYPE_LOWER; + chan->circ_id_type = CIRC_ID_TYPE_LOWER; } else { - chan->u.cell_chan.circ_id_type = CIRC_ID_TYPE_HIGHER; + chan->circ_id_type = CIRC_ID_TYPE_HIGHER; } } else { - chan->u.cell_chan.circ_id_type = CIRC_ID_TYPE_NEITHER; + chan->circ_id_type = CIRC_ID_TYPE_NEITHER; } } diff --git a/src/or/channel.h b/src/or/channel.h index 70ea30f..c31806c 100644 --- a/src/or/channel.h +++ b/src/or/channel.h @@ -12,7 +12,7 @@ #include "or.h" /* Channel handler function pointer typedefs */ -typedef void (*channel_listener_fn_ptr)(channel_t *, channel_t *); +typedef void (*channel_listener_fn_ptr)(channel_listener_t *, channel_t *); typedef void (*channel_cell_handler_fn_ptr)(channel_t *, cell_t *); typedef void (*channel_var_cell_handler_fn_ptr)(channel_t *, var_cell_t *); @@ -37,12 +37,6 @@ struct channel_s { /* Should we expect to see this channel in the channel lists? */ unsigned char registered:1; - /** Set this if this channel is created in CHANNEL_STATE_LISTEN, so - * lower-layer close methods that see the channel in CHANNEL_STATE_CLOSING - * know. - */ - unsigned int is_listener:1; - /** Why did we close? */ enum { @@ -67,171 +61,210 @@ struct channel_s { /* Optional method to dump transport-specific statistics on the channel */ void (*dumpstats)(channel_t *, int); - union { - struct { - /* Registered listen handler to call on incoming connection */ - channel_listener_fn_ptr listener; - - /* List of pending incoming connections */ - smartlist_t *incoming_list; - - /* Timestamps for listeners */ - time_t timestamp_accepted; - - /* Counters for listeners */ - uint64_t n_accepted; - } listener; - struct { - /* Registered handlers for incoming cells */ - channel_cell_handler_fn_ptr cell_handler; - channel_var_cell_handler_fn_ptr var_cell_handler; - - /* Methods implemented by the lower layer */ - - /* - * Ask the underlying transport what the remote endpoint address is, in - * a tor_addr_t. This is optional and subclasses may leave this NULL. - * If they implement it, they should write the address out to the - * provided tor_addr_t *, and return 1 if successful or 0 if no address - * available. - */ - int (*get_remote_addr)(channel_t *, tor_addr_t *); - /* - * Get a text description of the remote endpoint; canonicalized if the - * arg is 0, or the one we originally connected to/received from if it's - * 1. - */ - const char * (*get_remote_descr)(channel_t *, int); - /* Check if the lower layer has queued writes */ - int (*has_queued_writes)(channel_t *); - /* - * If the second param is zero, ask the lower layer if this is - * 'canonical', for a transport-specific definition of canonical; if - * it is 1, ask if the answer to the preceding query is safe to rely - * on. - */ - int (*is_canonical)(channel_t *, int); - /* Check if this channel matches a specified extend_info_t */ - int (*matches_extend_info)(channel_t *, extend_info_t *); - /* Check if this channel matches a target address when extending */ - int (*matches_target)(channel_t *, const tor_addr_t *); - /* Write a cell to an open channel */ - int (*write_cell)(channel_t *, cell_t *); - /* Write a packed cell to an open channel */ - int (*write_packed_cell)(channel_t *, packed_cell_t *); - /* Write a variable-length cell to an open channel */ - int (*write_var_cell)(channel_t *, var_cell_t *); - - /* - * Hash of the public RSA key for the other side's identity key, or - * zeroes if the other side hasn't shown us a valid identity key. - */ - char identity_digest[DIGEST_LEN]; - /* Nickname of the OR on the other side, or NULL if none. */ - char *nickname; - - /* - * Linked list of channels with the same identity digest, for the - * digest->channel map - */ - channel_t *next_with_same_id, *prev_with_same_id; - - /* List of incoming cells to handle */ - smartlist_t *incoming_queue; - - /* List of queued outgoing cells */ - smartlist_t *outgoing_queue; - - /* Circuit stuff for use by relay.c */ - - /* - * Double-linked ring of circuits with queued cells waiting for room to - * free up on this connection's outbuf. Every time we pull cells from - * a circuit, we advance this pointer to the next circuit in the ring. - */ - struct circuit_t *active_circuits; - /* - * Priority queue of cell_ewma_t for circuits with queued cells waiting - * for room to free up on this connection's outbuf. Kept in heap order - * according to EWMA. - * - * This is redundant with active_circuits; if we ever decide only to use - * the cell_ewma algorithm for choosing circuits, we can remove - * active_circuits. - */ - smartlist_t *active_circuit_pqueue; - /* - * The tick on which the cell_ewma_ts in active_circuit_pqueue last had - * their ewma values rescaled. - */ - unsigned active_circuit_pqueue_last_recalibrated; - - /* Circuit ID generation stuff for use by circuitbuild.c */ - - /* - * When we send CREATE cells along this connection, which half of the - * space should we use? - */ - circ_id_type_t circ_id_type:2; - /* - * Which circ_id do we try to use next on this connection? This is - * always in the range 0..1<<15-1. - */ - circid_t next_circ_id; - - /* How many circuits use this connection as p_chan or n_chan? */ - int n_circuits; - - /* - * True iff this channel shouldn't get any new circs attached to it, - * because the connection is too old, or because there's a better one. - * More generally, this flag is used to note an unhealthy connection; - * for example, if a bad connection fails we shouldn't assume that the - * router itself has a problem. - */ - unsigned int is_bad_for_new_circs:1; - - /** True iff we have decided that the other end of this connection - * is a client. Channels with this flag set should never be used - * to satisfy an EXTEND request. */ - unsigned int is_client:1; - - /** Set if the channel was initiated remotely (came from a listener) */ - unsigned int is_incoming:1; - - /** Set by lower layer if this is local; i.e., everything it communicates - * with for this channel returns true for is_local_addr(). This is used - * to decide whether to declare reachability when we receive something on - * this channel in circuitbuild.c - */ - unsigned int is_local:1; - - /** Channel timestamps for cell channels */ - time_t timestamp_client; /* Client used this, according to relay.c */ - time_t timestamp_drained; /* Output queue empty */ - time_t timestamp_recv; /* Cell received from lower layer */ - time_t timestamp_xmit; /* Cell sent to lower layer */ - - /* Timestamp for relay.c */ - time_t timestamp_last_added_nonpadding; - - /** Unique ID for measuring direct network status requests;vtunneled ones - * come over a circuit_t, which has a dirreq_id field as well, but is a - * distinct namespace. */ - uint64_t dirreq_id; - - /** Channel counters for cell channels */ - uint64_t n_cells_recved; - uint64_t n_cells_xmitted; - } cell_chan; - } u; + /* Registered handlers for incoming cells */ + channel_cell_handler_fn_ptr cell_handler; + channel_var_cell_handler_fn_ptr var_cell_handler; + + /* Methods implemented by the lower layer */ + + /* + * Ask the underlying transport what the remote endpoint address is, in + * a tor_addr_t. This is optional and subclasses may leave this NULL. + * If they implement it, they should write the address out to the + * provided tor_addr_t *, and return 1 if successful or 0 if no address + * available. + */ + int (*get_remote_addr)(channel_t *, tor_addr_t *); + /* + * Get a text description of the remote endpoint; canonicalized if the + * arg is 0, or the one we originally connected to/received from if it's + * 1. + */ + const char * (*get_remote_descr)(channel_t *, int); + /* Check if the lower layer has queued writes */ + int (*has_queued_writes)(channel_t *); + /* + * If the second param is zero, ask the lower layer if this is + * 'canonical', for a transport-specific definition of canonical; if + * it is 1, ask if the answer to the preceding query is safe to rely + * on. + */ + int (*is_canonical)(channel_t *, int); + /* Check if this channel matches a specified extend_info_t */ + int (*matches_extend_info)(channel_t *, extend_info_t *); + /* Check if this channel matches a target address when extending */ + int (*matches_target)(channel_t *, const tor_addr_t *); + /* Write a cell to an open channel */ + int (*write_cell)(channel_t *, cell_t *); + /* Write a packed cell to an open channel */ + int (*write_packed_cell)(channel_t *, packed_cell_t *); + /* Write a variable-length cell to an open channel */ + int (*write_var_cell)(channel_t *, var_cell_t *); + + /* + * Hash of the public RSA key for the other side's identity key, or + * zeroes if the other side hasn't shown us a valid identity key. + */ + char identity_digest[DIGEST_LEN]; + /* Nickname of the OR on the other side, or NULL if none. */ + char *nickname; + + /* + * Linked list of channels with the same identity digest, for the + * digest->channel map + */ + channel_t *next_with_same_id, *prev_with_same_id; + + /* List of incoming cells to handle */ + smartlist_t *incoming_queue; + + /* List of queued outgoing cells */ + smartlist_t *outgoing_queue; + + /* Circuit stuff for use by relay.c */ + + /* + * Double-linked ring of circuits with queued cells waiting for room to + * free up on this connection's outbuf. Every time we pull cells from + * a circuit, we advance this pointer to the next circuit in the ring. + */ + struct circuit_t *active_circuits; + /* + * Priority queue of cell_ewma_t for circuits with queued cells waiting + * for room to free up on this connection's outbuf. Kept in heap order + * according to EWMA. + * + * This is redundant with active_circuits; if we ever decide only to use + * the cell_ewma algorithm for choosing circuits, we can remove + * active_circuits. + */ + smartlist_t *active_circuit_pqueue; + /* + * The tick on which the cell_ewma_ts in active_circuit_pqueue last had + * their ewma values rescaled. + */ + unsigned active_circuit_pqueue_last_recalibrated; + + /* Circuit ID generation stuff for use by circuitbuild.c */ + + /* + * When we send CREATE cells along this connection, which half of the + * space should we use? + */ + circ_id_type_t circ_id_type:2; + /* + * Which circ_id do we try to use next on this connection? This is + * always in the range 0..1<<15-1. + */ + circid_t next_circ_id; + + /* How many circuits use this connection as p_chan or n_chan? */ + int n_circuits; + + /* + * True iff this channel shouldn't get any new circs attached to it, + * because the connection is too old, or because there's a better one. + * More generally, this flag is used to note an unhealthy connection; + * for example, if a bad connection fails we shouldn't assume that the + * router itself has a problem. + */ + unsigned int is_bad_for_new_circs:1; + + /** True iff we have decided that the other end of this connection + * is a client. Channels with this flag set should never be used + * to satisfy an EXTEND request. */ + unsigned int is_client:1; + + /** Set if the channel was initiated remotely (came from a listener) */ + unsigned int is_incoming:1; + + /** Set by lower layer if this is local; i.e., everything it communicates + * with for this channel returns true for is_local_addr(). This is used + * to decide whether to declare reachability when we receive something on + * this channel in circuitbuild.c + */ + unsigned int is_local:1; + + /** Channel timestamps for cell channels */ + time_t timestamp_client; /* Client used this, according to relay.c */ + time_t timestamp_drained; /* Output queue empty */ + time_t timestamp_recv; /* Cell received from lower layer */ + time_t timestamp_xmit; /* Cell sent to lower layer */ + + /* Timestamp for relay.c */ + time_t timestamp_last_added_nonpadding; + + /** Unique ID for measuring direct network status requests;vtunneled ones + * come over a circuit_t, which has a dirreq_id field as well, but is a + * distinct namespace. */ + uint64_t dirreq_id; + + /** Channel counters for cell channels */ + uint64_t n_cells_recved; + uint64_t n_cells_xmitted; +}; + +struct channel_listener_s { + /* Current channel listener state */ + channel_listener_state_t state; + + /* Globally unique ID number for a channel over the lifetime of a Tor + * process. + */ + uint64_t global_identifier; + + /* Should we expect to see this channel in the channel lists? */ + unsigned char registered:1; + + /** Why did we close? + */ + enum { + CHANNEL_LISTENER_NOT_CLOSING = 0, + CHANNEL_LISTENER_CLOSE_REQUESTED, + CHANNEL_LISTENER_CLOSE_FROM_BELOW, + CHANNEL_LISTENER_CLOSE_FOR_ERROR + } reason_for_closing; + + /* Timestamps for both cell channels and listeners */ + time_t timestamp_created; /* Channel created */ + time_t timestamp_active; /* Any activity */ + + /* Methods implemented by the lower layer */ + + /* Free a channel */ + void (*free)(channel_listener_t *); + /* Close an open channel */ + void (*close)(channel_listener_t *); + /* Describe the transport subclass for this channel */ + const char * (*describe_transport)(channel_listener_t *); + /* Optional method to dump transport-specific statistics on the channel */ + void (*dumpstats)(channel_listener_t *, int); + + /* Registered listen handler to call on incoming connection */ + channel_listener_fn_ptr listener; + + /* List of pending incoming connections */ + smartlist_t *incoming_list; + + /* Timestamps for listeners */ + time_t timestamp_accepted; + + /* Counters for listeners */ + uint64_t n_accepted; }; /* Channel state manipulations */ int channel_state_is_valid(channel_state_t state); +int channel_listener_state_is_valid(channel_listener_state_t state); + int channel_state_can_transition(channel_state_t from, channel_state_t to); +int channel_listener_state_can_transition(channel_listener_state_t from, + channel_listener_state_t to); + const char * channel_state_to_string(channel_state_t state); +const char * +channel_listener_state_to_string(channel_listener_state_t state); /* Abstract channel operations */ @@ -240,12 +273,16 @@ void channel_write_cell(channel_t *chan, cell_t *cell); void channel_write_packed_cell(channel_t *chan, packed_cell_t *cell); void channel_write_var_cell(channel_t *chan, var_cell_t *cell); +void channel_listener_mark_for_close(channel_listener_t *chan_l); + /* Channel callback registrations */ /* Listener callback */ -channel_listener_fn_ptr channel_get_listener_fn(channel_t *chan); -void channel_set_listener_fn(channel_t *chan, - channel_listener_fn_ptr listener); +channel_listener_fn_ptr +channel_listener_get_listener_fn(channel_listener_t *chan); + +void channel_listener_set_listener_fn(channel_listener_t *chan, + channel_listener_fn_ptr listener); /* Incoming cell callbacks */ channel_cell_handler_fn_ptr channel_get_cell_handler(channel_t *chan); @@ -258,16 +295,18 @@ void channel_set_cell_handlers(channel_t *chan, channel_var_cell_handler_fn_ptr var_cell_handler); -/* Clean up closed channels periodically; called from run_scheduled_events() - * in main.c +/* Clean up closed channels and channel listeners periodically; these are + * called from run_scheduled_events() in main.c. */ void channel_run_cleanup(void); +void channel_listener_run_cleanup(void); /* Close all channels and deallocate everything */ void channel_free_all(void); /* Dump some statistics in the log */ void channel_dumpstats(int severity); +void channel_listener_dumpstats(int severity); #ifdef _TOR_CHANNEL_INTERNAL @@ -277,20 +316,29 @@ void channel_dumpstats(int severity); * constructors. */ -void channel_init_for_cells(channel_t *chan); -void channel_init_listener(channel_t *chan); +void channel_init(channel_t *chan); +void channel_init_listener(channel_listener_t *chan); /* Channel registration/unregistration */ void channel_register(channel_t *chan); void channel_unregister(channel_t *chan); +/* Channel listener registration/unregistration */ +void channel_listener_register(channel_listener_t *chan_l); +void channel_listener_unregister(channel_listener_t *chan_l); + /* Close from below */ void channel_close_from_lower_layer(channel_t *chan); void channel_close_for_error(channel_t *chan); void channel_closed(channel_t *chan); +void channel_listener_close_from_lower_layer(channel_listener_t *chan_l); +void channel_listener_close_for_error(channel_listener_t *chan_l); +void channel_listener_closed(channel_listener_t *chan_l); + /* Free a channel */ void channel_free(channel_t *chan); +void channel_listener_free(channel_listener_t *chan_l); /* State/metadata setters */ @@ -306,17 +354,24 @@ void channel_set_remote_end(channel_t *chan, const char *identity_digest, const char *nickname); +void channel_listener_change_state(channel_listener_t *chan_l, + channel_listener_state_t to_state); + /* Timestamp updates */ void channel_timestamp_created(channel_t *chan); -void channel_timestamp_accepted(channel_t *chan); void channel_timestamp_active(channel_t *chan); void channel_timestamp_drained(channel_t *chan); void channel_timestamp_recv(channel_t *chan); void channel_timestamp_xmit(channel_t *chan); +void channel_listener_timestamp_created(channel_listener_t *chan_l); +void channel_listener_timestamp_active(channel_listener_t *chan_l); +void channel_listener_timestamp_accepted(channel_listener_t *chan_l); + /* Incoming channel handling */ -void channel_process_incoming(channel_t *listener); -void channel_queue_incoming(channel_t *listener, channel_t *incoming); +void channel_listener_process_incoming(channel_listener_t *listener); +void channel_listener_queue_incoming(channel_listener_t *listener, + channel_t *incoming); /* Incoming cell handling */ void channel_process_cells(channel_t *chan); @@ -401,19 +456,29 @@ int channel_matches_target_addr_for_extend(channel_t *chan, void channel_set_circid_type(channel_t *chan, crypto_pk_t *identity_rcvd); void channel_timestamp_client(channel_t *chan); +const char * channel_listener_describe_transport(channel_listener_t *chan_l); +void channel_listener_dump_statistics(channel_listener_t *chan_l, + int severity); +void channel_listener_dump_transport_statistics(channel_listener_t *chan_l, + int severity); + /* Timestamp queries */ time_t channel_when_created(channel_t *chan); -time_t channel_when_last_accepted(channel_t *chan); time_t channel_when_last_active(channel_t *chan); time_t channel_when_last_client(channel_t *chan); time_t channel_when_last_drained(channel_t *chan); time_t channel_when_last_recv(channel_t *chan); time_t channel_when_last_xmit(channel_t *chan); +time_t channel_listener_when_created(channel_listener_t *chan_l); +time_t channel_listener_when_last_active(channel_listener_t *chan_l); +time_t channel_listener_when_last_accepted(channel_listener_t *chan_l); + /* Counter queries */ -uint64_t channel_count_accepted(channel_t *chan); uint64_t channel_count_recved(channel_t *chan); uint64_t channel_count_xmitted(channel_t *chan); +uint64_t channel_listener_count_accepted(channel_listener_t *chan_l); + #endif diff --git a/src/or/channeltls.c b/src/or/channeltls.c index bb90ce5..93e0636 100644 --- a/src/or/channeltls.c +++ b/src/or/channeltls.c @@ -42,7 +42,7 @@ uint64_t stats_n_authenticate_cells_processed = 0; uint64_t stats_n_authorize_cells_processed = 0; /** Active listener, if any */ -channel_tls_t *channel_tls_listener = NULL; +channel_listener_t *channel_tls_listener = NULL; /* channel_tls_t method declarations */ @@ -66,6 +66,12 @@ static int channel_tls_write_packed_cell_method(channel_t *chan, static int channel_tls_write_var_cell_method(channel_t *chan, var_cell_t *var_cell); +/* channel_listener_tls_t method declarations */ + +static void channel_tls_listener_close_method(channel_listener_t *chan_l); +static const char * +channel_tls_listener_describe_transport_method(channel_listener_t *chan_l); + /** Handle incoming cells for the handshake stuff here rather than * passing them on up. */ @@ -97,20 +103,19 @@ channel_tls_connect(const tor_addr_t *addr, uint16_t port, { channel_tls_t *tlschan = tor_malloc_zero(sizeof(*tlschan)); channel_t *chan = TLS_CHAN_TO_BASE(tlschan); - channel_init_for_cells(chan); + channel_init(chan); chan->state = CHANNEL_STATE_OPENING; chan->close = channel_tls_close_method; chan->describe_transport = channel_tls_describe_transport_method; - chan->u.cell_chan.get_remote_addr = channel_tls_get_remote_addr_method; - chan->u.cell_chan.get_remote_descr = channel_tls_get_remote_descr_method; - chan->u.cell_chan.has_queued_writes = channel_tls_has_queued_writes_method; - chan->u.cell_chan.is_canonical = channel_tls_is_canonical_method; - chan->u.cell_chan.matches_extend_info = - channel_tls_matches_extend_info_method; - chan->u.cell_chan.matches_target = channel_tls_matches_target_method; - chan->u.cell_chan.write_cell = channel_tls_write_cell_method; - chan->u.cell_chan.write_packed_cell = channel_tls_write_packed_cell_method; - chan->u.cell_chan.write_var_cell = channel_tls_write_var_cell_method; + chan->get_remote_addr = channel_tls_get_remote_addr_method; + chan->get_remote_descr = channel_tls_get_remote_descr_method; + chan->has_queued_writes = channel_tls_has_queued_writes_method; + chan->is_canonical = channel_tls_is_canonical_method; + chan->matches_extend_info = channel_tls_matches_extend_info_method; + chan->matches_target = channel_tls_matches_target_method; + chan->write_cell = channel_tls_write_cell_method; + chan->write_packed_cell = channel_tls_write_packed_cell_method; + chan->write_var_cell = channel_tls_write_var_cell_method; log_debug(LD_CHANNEL, "In channel_tls_connect() for channel %p " @@ -121,9 +126,8 @@ channel_tls_connect(const tor_addr_t *addr, uint16_t port, if (is_local_addr(addr)) channel_mark_local(chan); channel_mark_outgoing(chan); - chan->u.cell_chan.active_circuit_pqueue = smartlist_new(); - chan->u.cell_chan.active_circuit_pqueue_last_recalibrated = - cell_ewma_get_tick(); + chan->active_circuit_pqueue = smartlist_new(); + chan->active_circuit_pqueue_last_recalibrated = cell_ewma_get_tick(); /* Set up or_connection stuff */ tlschan->conn = connection_or_connect(addr, port, id_digest, tlschan); @@ -140,7 +144,7 @@ channel_tls_connect(const tor_addr_t *addr, uint16_t port, goto done; err: - smartlist_free(chan->u.cell_chan.active_circuit_pqueue); + smartlist_free(chan->active_circuit_pqueue); tor_free(tlschan); chan = NULL; @@ -154,14 +158,14 @@ channel_tls_connect(const tor_addr_t *addr, uint16_t port, /** * Return the current channel_tls_t listener * - * Returns the current listening channel for incoming TLS connections, or + * Returns the current channel listener for incoming TLS connections, or * NULL if none has been established */ -channel_t * +channel_listener_t * channel_tls_get_listener(void) { - return TLS_CHAN_TO_BASE(channel_tls_listener); + return channel_tls_listener; } /** @@ -171,30 +175,29 @@ channel_tls_get_listener(void) * and return that. */ -channel_t * +channel_listener_t * channel_tls_start_listener(void) { - channel_tls_t *listener; - channel_t *lchan; + channel_listener_t *listener; if (!channel_tls_listener) { listener = tor_malloc_zero(sizeof(*listener)); - lchan = TLS_CHAN_TO_BASE(listener); - channel_init_listener(lchan); - lchan->state = CHANNEL_STATE_LISTENING; - lchan->close = channel_tls_close_method; - lchan->describe_transport = channel_tls_describe_transport_method; + channel_init_listener(listener); + listener->state = CHANNEL_LISTENER_STATE_LISTENING; + listener->close = channel_tls_listener_close_method; + listener->describe_transport = + channel_tls_listener_describe_transport_method; channel_tls_listener = listener; log_debug(LD_CHANNEL, - "Starting TLS listener channel %p with global id " U64_FORMAT, - lchan, U64_PRINTF_ARG(lchan->global_identifier)); + "Starting TLS channel listener %p with global id " U64_FORMAT, + listener, U64_PRINTF_ARG(listener->global_identifier)); - channel_register(lchan); - } else lchan = TLS_CHAN_TO_BASE(channel_tls_listener); + channel_listener_register(listener); + } else listener = channel_tls_listener; - return lchan; + return listener; } /** @@ -207,16 +210,13 @@ channel_tls_start_listener(void) void channel_tls_free_all(void) { - channel_t *base = NULL; - log_debug(LD_CHANNEL, "Shutting down TLS channels..."); if (channel_tls_listener) { - base = TLS_CHAN_TO_BASE(channel_tls_listener); - channel_unregister(base); - channel_mark_for_close(base); - channel_free(base); + channel_listener_unregister(channel_tls_listener); + channel_listener_mark_for_close(channel_tls_listener); + channel_listener_free(channel_tls_listener); channel_tls_listener = NULL; } @@ -237,19 +237,18 @@ channel_tls_handle_incoming(or_connection_t *orconn) tor_assert(orconn); tor_assert(!(orconn->chan)); - channel_init_for_cells(chan); + channel_init(chan); chan->state = CHANNEL_STATE_OPENING; chan->close = channel_tls_close_method; chan->describe_transport = channel_tls_describe_transport_method; - chan->u.cell_chan.get_remote_descr = channel_tls_get_remote_descr_method; - chan->u.cell_chan.has_queued_writes = channel_tls_has_queued_writes_method; - chan->u.cell_chan.is_canonical = channel_tls_is_canonical_method; - chan->u.cell_chan.matches_extend_info = - channel_tls_matches_extend_info_method; - chan->u.cell_chan.matches_target = channel_tls_matches_target_method; - chan->u.cell_chan.write_cell = channel_tls_write_cell_method; - chan->u.cell_chan.write_packed_cell = channel_tls_write_packed_cell_method; - chan->u.cell_chan.write_var_cell = channel_tls_write_var_cell_method; + chan->get_remote_descr = channel_tls_get_remote_descr_method; + chan->has_queued_writes = channel_tls_has_queued_writes_method; + chan->is_canonical = channel_tls_is_canonical_method; + chan->matches_extend_info = channel_tls_matches_extend_info_method; + chan->matches_target = channel_tls_matches_target_method; + chan->write_cell = channel_tls_write_cell_method; + chan->write_packed_cell = channel_tls_write_packed_cell_method; + chan->write_var_cell = channel_tls_write_var_cell_method; /* Link the channel and orconn to each other */ tlschan->conn = orconn; @@ -258,9 +257,8 @@ channel_tls_handle_incoming(or_connection_t *orconn) if (is_local_addr(&(TO_CONN(orconn)->addr))) channel_mark_local(chan); channel_mark_incoming(chan); - chan->u.cell_chan.active_circuit_pqueue = smartlist_new(); - chan->u.cell_chan.active_circuit_pqueue_last_recalibrated = - cell_ewma_get_tick(); + chan->active_circuit_pqueue = smartlist_new(); + chan->active_circuit_pqueue_last_recalibrated = cell_ewma_get_tick(); /* If we got one, we should register it */ if (chan) channel_register(chan); @@ -285,43 +283,13 @@ channel_tls_close_method(channel_t *chan) tor_assert(tlschan); - if (chan->is_listener) { - /* - * Listeners we just go ahead and change state through to CLOSED, but - * make sure to check if they're channel_tls_listener to NULL it out. - */ - if (chan == TLS_CHAN_TO_BASE(channel_tls_listener)) - channel_tls_listener = NULL; - - if (!(chan->state == CHANNEL_STATE_CLOSING || - chan->state == CHANNEL_STATE_CLOSED || - chan->state == CHANNEL_STATE_ERROR)) { - channel_change_state(chan, CHANNEL_STATE_CLOSING); - } - - if (chan->u.listener.incoming_list) { - SMARTLIST_FOREACH_BEGIN(chan->u.listener.incoming_list, - channel_t *, ichan) { - channel_mark_for_close(ichan); - } SMARTLIST_FOREACH_END(ichan); - - smartlist_free(chan->u.listener.incoming_list); - chan->u.listener.incoming_list = NULL; - } - - if (!(chan->state == CHANNEL_STATE_CLOSED || - chan->state == CHANNEL_STATE_ERROR)) { - channel_change_state(chan, CHANNEL_STATE_CLOSED); - } - } else { - if (tlschan->conn) connection_or_close_normally(tlschan->conn, 1); - else { - /* Weird - we'll have to change the state ourselves, I guess */ - log_info(LD_CHANNEL, - "Tried to close channel_tls_t %p with NULL conn", - tlschan); - channel_change_state(chan, CHANNEL_STATE_ERROR); - } + if (tlschan->conn) connection_or_close_normally(tlschan->conn, 1); + else { + /* Weird - we'll have to change the state ourselves, I guess */ + log_info(LD_CHANNEL, + "Tried to close channel_tls_t %p with NULL conn", + tlschan); + channel_change_state(chan, CHANNEL_STATE_ERROR); } } @@ -342,23 +310,19 @@ channel_tls_describe_transport_method(channel_t *chan) tor_assert(chan); - if (chan->is_listener) { - rv = "TLS channel (listening)"; - } else { - tlschan = BASE_CHAN_TO_TLS(chan); + tlschan = BASE_CHAN_TO_TLS(chan); - if (tlschan->conn) { - id = TO_CONN(tlschan->conn)->global_identifier; + if (tlschan->conn) { + id = TO_CONN(tlschan->conn)->global_identifier; - if (buf) tor_free(buf); - tor_asprintf(&buf, - "TLS channel (connection " U64_FORMAT ")", - U64_PRINTF_ARG(id)); + if (buf) tor_free(buf); + tor_asprintf(&buf, + "TLS channel (connection " U64_FORMAT ")", + U64_PRINTF_ARG(id)); - rv = buf; - } else { - rv = "TLS channel (no connection)"; - } + rv = buf; + } else { + rv = "TLS channel (no connection)"; } return rv; @@ -603,6 +567,65 @@ channel_tls_write_var_cell_method(channel_t *chan, var_cell_t *var_cell) return 1; } +/************************************************* + * Method implementations for channel_listener_t * + ************************************************/ + +/** + * Close a channel_listener_t + * + * This implements the close method for channel_listener_t + */ + +static void +channel_tls_listener_close_method(channel_listener_t *chan_l) +{ + tor_assert(chan_l); + + /* + * Listeners we just go ahead and change state through to CLOSED, but + * make sure to check if they're channel_tls_listener to NULL it out. + */ + if (chan_l == channel_tls_listener) + channel_tls_listener = NULL; + + if (!(chan_l->state == CHANNEL_LISTENER_STATE_CLOSING || + chan_l->state == CHANNEL_LISTENER_STATE_CLOSED || + chan_l->state == CHANNEL_LISTENER_STATE_ERROR)) { + channel_listener_change_state(chan_l, CHANNEL_LISTENER_STATE_CLOSING); + } + + if (chan_l->incoming_list) { + SMARTLIST_FOREACH_BEGIN(chan_l->incoming_list, + channel_t *, ichan) { + channel_mark_for_close(ichan); + } SMARTLIST_FOREACH_END(ichan); + + smartlist_free(chan_l->incoming_list); + chan_l->incoming_list = NULL; + } + + if (!(chan_l->state == CHANNEL_LISTENER_STATE_CLOSED || + chan_l->state == CHANNEL_LISTENER_STATE_ERROR)) { + channel_listener_change_state(chan_l, CHANNEL_LISTENER_STATE_CLOSED); + } +} + +/** + * Describe the transport for a channel_listener_t + * + * This returns the string "TLS channel (listening)" to the upper + * layer. + */ + +static const char * +channel_tls_listener_describe_transport_method(channel_listener_t *chan_l) +{ + tor_assert(chan_l); + + return "TLS channel (listening)"; +} + /******************************************************* * Functions for handling events on an or_connection_t * ******************************************************/ @@ -782,8 +805,6 @@ channel_tls_handle_cell(cell_t *cell, or_connection_t *conn) return; } - tor_assert(!(TLS_CHAN_TO_BASE(chan)->is_listener)); - handshaking = (TO_CONN(conn)->state != OR_CONN_STATE_OPEN); if (conn->_base.marked_for_close) @@ -892,8 +913,6 @@ channel_tls_handle_var_cell(var_cell_t *var_cell, or_connection_t *conn) return; } - tor_assert(!(TLS_CHAN_TO_BASE(chan)->is_listener)); - handshaking = (TO_CONN(conn)->state != OR_CONN_STATE_OPEN); if (TO_CONN(conn)->marked_for_close) @@ -1049,7 +1068,6 @@ enter_v3_handshake_with_cell(var_cell_t *cell, channel_tls_t *chan) tor_assert(cell); tor_assert(chan); - tor_assert(!(TLS_CHAN_TO_BASE(chan)->is_listener)); tor_assert(chan->conn); started_here = connection_or_nonopen_was_started_here(chan->conn); @@ -1091,7 +1109,6 @@ channel_tls_process_versions_cell(var_cell_t *cell, channel_tls_t *chan) tor_assert(cell); tor_assert(chan); - tor_assert(!(TLS_CHAN_TO_BASE(chan)->is_listener)); tor_assert(chan->conn); started_here = connection_or_nonopen_was_started_here(chan->conn); @@ -1247,7 +1264,6 @@ channel_tls_process_netinfo_cell(cell_t *cell, channel_tls_t *chan) tor_assert(cell); tor_assert(chan); - tor_assert(!(TLS_CHAN_TO_BASE(chan)->is_listener)); tor_assert(chan->conn); if (chan->conn->link_proto < 2) { @@ -1386,7 +1402,7 @@ channel_tls_process_netinfo_cell(cell_t *cell, channel_tls_t *chan) safe_str_client(chan->conn->_base.address), chan->conn->_base.port, (int)(chan->conn->link_proto), - hex_str(TLS_CHAN_TO_BASE(chan)->u.cell_chan.identity_digest, + hex_str(TLS_CHAN_TO_BASE(chan)->identity_digest, DIGEST_LEN), tor_addr_is_null(&my_apparent_addr) ? "<none>" : fmt_and_decorate_addr(&my_apparent_addr)); @@ -1422,7 +1438,6 @@ channel_tls_process_certs_cell(var_cell_t *cell, channel_tls_t *chan) tor_assert(cell); tor_assert(chan); - tor_assert(!(TLS_CHAN_TO_BASE(chan)->is_listener)); tor_assert(chan->conn); #define ERR(s) \ @@ -1515,7 +1530,7 @@ channel_tls_process_certs_cell(var_cell_t *cell, channel_tls_t *chan) * _trying_ to connect to an authority, not necessarily if we _did_ connect * to one. */ if (router_digest_is_trusted_dir( - TLS_CHAN_TO_BASE(chan)->u.cell_chan.identity_digest)) + TLS_CHAN_TO_BASE(chan)->identity_digest)) severity = LOG_WARN; else severity = LOG_PROTOCOL_WARN; @@ -1616,7 +1631,6 @@ channel_tls_process_auth_challenge_cell(var_cell_t *cell, channel_tls_t *chan) tor_assert(cell); tor_assert(chan); - tor_assert(!(TLS_CHAN_TO_BASE(chan)->is_listener)); tor_assert(chan->conn); #define ERR(s) \ @@ -1714,7 +1728,6 @@ channel_tls_process_authenticate_cell(var_cell_t *cell, channel_tls_t *chan) tor_assert(cell); tor_assert(chan); - tor_assert(!(TLS_CHAN_TO_BASE(chan)->is_listener)); tor_assert(chan->conn); #define ERR(s) \ diff --git a/src/or/channeltls.h b/src/or/channeltls.h index 3b7d6a7..b38e12a 100644 --- a/src/or/channeltls.h +++ b/src/or/channeltls.h @@ -28,8 +28,8 @@ struct channel_tls_s { channel_t * channel_tls_connect(const tor_addr_t *addr, uint16_t port, const char *id_digest); -channel_t * channel_tls_get_listener(void); -channel_t * channel_tls_start_listener(void); +channel_listener_t * channel_tls_get_listener(void); +channel_listener_t * channel_tls_start_listener(void); channel_t * channel_tls_handle_incoming(or_connection_t *orconn); /* Things for connection_or.c to call back into */ diff --git a/src/or/circuitbuild.c b/src/or/circuitbuild.c index 5ef67bd..749985f 100644 --- a/src/or/circuitbuild.c +++ b/src/or/circuitbuild.c @@ -1711,23 +1711,22 @@ get_unique_circ_id_by_chan(channel_t *chan) circid_t high_bit; tor_assert(chan); - tor_assert(!(chan->is_listener)); - if (chan->u.cell_chan.circ_id_type == CIRC_ID_TYPE_NEITHER) { + if (chan->circ_id_type == CIRC_ID_TYPE_NEITHER) { log_warn(LD_BUG, "Trying to pick a circuit ID for a connection from " "a client with no identity."); return 0; } high_bit = - (chan->u.cell_chan.circ_id_type == CIRC_ID_TYPE_HIGHER) ? 1<<15 : 0; + (chan->circ_id_type == CIRC_ID_TYPE_HIGHER) ? 1<<15 : 0; do { /* Sequentially iterate over test_circ_id=1...1<<15-1 until we find a * circID such that (high_bit|test_circ_id) is not already used. */ - test_circ_id = chan->u.cell_chan.next_circ_id++; + test_circ_id = chan->next_circ_id++; if (test_circ_id == 0 || test_circ_id >= 1<<15) { test_circ_id = 1; - chan->u.cell_chan.next_circ_id = 2; + chan->next_circ_id = 2; } if (++attempts > 1<<15) { /* Make sure we don't loop forever if all circ_id's are used. This @@ -2039,11 +2038,9 @@ circuit_n_chan_done(channel_t *chan, int status) int err_reason = 0; tor_assert(chan); - tor_assert(!(chan->is_listener)); log_debug(LD_CIRC,"chan to %s/%s, status=%d", - chan->u.cell_chan.nickname ? - chan->u.cell_chan.nickname : "NULL", + chan->nickname ? chan->nickname : "NULL", channel_get_canonical_remote_descr(chan), status); pending_circs = smartlist_new(); @@ -2064,7 +2061,7 @@ circuit_n_chan_done(channel_t *chan, int status) continue; } else { /* We expected a key. See if it's the right one. */ - if (tor_memneq(chan->u.cell_chan.identity_digest, + if (tor_memneq(chan->identity_digest, circ->n_hop->identity_digest, DIGEST_LEN)) continue; } @@ -2247,8 +2244,7 @@ circuit_send_next_onion_skin(origin_circuit_t *circ) else control_event_bootstrap(BOOTSTRAP_STATUS_CIRCUIT_CREATE, 0); - tor_assert(!(circ->_base.n_chan->is_listener)); - node = node_get_by_id(circ->_base.n_chan->u.cell_chan.identity_digest); + node = node_get_by_id(circ->_base.n_chan->identity_digest); fast = should_use_create_fast_for_circuit(circ); if (!fast) { /* We are an OR and we know the right onion key: we should @@ -2487,10 +2483,8 @@ circuit_extend(cell_t *cell, circuit_t *circ) /* Next, check if we're being asked to connect to the hop that the * extend cell came from. There isn't any reason for that, and it can * assist circular-path attacks. */ - tor_assert(!(TO_OR_CIRCUIT(circ)->p_chan->is_listener)); if (tor_memeq(id_digest, - TO_OR_CIRCUIT(circ)->p_chan-> - u.cell_chan.identity_digest, + TO_OR_CIRCUIT(circ)->p_chan->identity_digest, DIGEST_LEN)) { log_fn(LOG_PROTOCOL_WARN, LD_PROTOCOL, "Client asked me to extend back to the previous hop."); @@ -2733,9 +2727,8 @@ pathbias_count_first_hop(origin_circuit_t *circ) if (!circ->has_opened) { entry_guard_t *guard; - tor_assert(!(circ->_base.n_chan->is_listener)); - guard = entry_guard_get_by_id_digest( - circ->_base.n_chan->u.cell_chan.identity_digest); + guard = + entry_guard_get_by_id_digest(circ->_base.n_chan->identity_digest); if (guard) { if (circ->path_state == PATH_STATE_NEW_CIRC) { circ->path_state = PATH_STATE_DID_FIRST_HOP; @@ -2840,10 +2833,8 @@ pathbias_count_success(origin_circuit_t *circ) /* Don't count cannibalized/reused circs for path bias */ if (!circ->has_opened) { - tor_assert(!(circ->_base.n_chan->is_listener)); guard = - entry_guard_get_by_id_digest(circ->_base.n_chan-> - u.cell_chan.identity_digest); + entry_guard_get_by_id_digest(circ->_base.n_chan->identity_digest); if (guard) { if (circ->path_state == PATH_STATE_DID_FIRST_HOP) { diff --git a/src/or/circuitlist.c b/src/or/circuitlist.c index 68cd19e..cf6020d 100644 --- a/src/or/circuitlist.c +++ b/src/or/circuitlist.c @@ -102,8 +102,6 @@ circuit_set_circid_chan_helper(circuit_t *circ, int direction, circid_t old_id, *circid_ptr; int was_active, make_active; - if (chan) tor_assert(!(chan->is_listener)); - if (direction == CELL_DIRECTION_OUT) { chan_ptr = &circ->n_chan; circid_ptr = &circ->n_circ_id; @@ -131,13 +129,12 @@ circuit_set_circid_chan_helper(circuit_t *circ, int direction, } if (old_chan) { /* we may need to remove it from the conn-circid map */ - tor_assert(!(old_chan->is_listener)); search.circ_id = old_id; search.chan = old_chan; found = HT_REMOVE(chan_circid_map, &chan_circid_map, &search); if (found) { tor_free(found); - --old_chan->u.cell_chan.n_circuits; + --old_chan->n_circuits; } if (was_active && old_chan != chan) make_circuit_inactive_on_chan(circ, old_chan); @@ -167,7 +164,7 @@ circuit_set_circid_chan_helper(circuit_t *circ, int direction, if (make_active && old_chan != chan) make_circuit_active_on_chan(circ,chan); - ++chan->u.cell_chan.n_circuits; + ++chan->n_circuits; } /** Set the p_conn field of a circuit circ, along @@ -242,7 +239,6 @@ circuit_get_all_pending_on_channel(smartlist_t *out, channel_t *chan) { tor_assert(out); tor_assert(chan); - tor_assert(!(chan->is_listener)); if (!circuits_pending_chans) return; @@ -259,8 +255,8 @@ circuit_get_all_pending_on_channel(smartlist_t *out, channel_t *chan) continue; } else { /* We expected a key. See if it's the right one. */ - if (tor_memneq(chan->u.cell_chan.identity_digest, - circ->n_hop->identity_digest, DIGEST_LEN)) + if (tor_memneq(chan->identity_digest, + circ->n_hop->identity_digest, DIGEST_LEN)) continue; } smartlist_add(out, circ); @@ -276,14 +272,12 @@ circuit_count_pending_on_channel(channel_t *chan) smartlist_t *sl = smartlist_new(); tor_assert(chan); - tor_assert(!(chan->is_listener)); circuit_get_all_pending_on_channel(sl, chan); cnt = smartlist_len(sl); smartlist_free(sl); log_debug(LD_CIRC,"or_conn to %s at %s, %d pending circs", - chan->u.cell_chan.nickname ? - chan->u.cell_chan.nickname : "NULL", + chan->nickname ? chan->nickname : "NULL", channel_get_canonical_remote_descr(chan), cnt); return cnt; @@ -839,7 +833,6 @@ circuit_dump_by_chan(channel_t *chan, int severity) circuit_t *circ; tor_assert(chan); - tor_assert(!(chan->is_listener)); for (circ = global_circuitlist; circ; circ = circ->next) { circid_t n_circ_id = circ->n_circ_id, p_circ_id = 0; @@ -865,7 +858,7 @@ circuit_dump_by_chan(channel_t *chan, int severity) if (!circ->n_chan && circ->n_hop && channel_matches_extend_info(chan, circ->n_hop) && - tor_memeq(chan->u.cell_chan.identity_digest, + tor_memeq(chan->identity_digest, circ->n_hop->identity_digest, DIGEST_LEN)) { circuit_dump_chan_details(severity, circ, chan, (circ->state == CIRCUIT_STATE_OPEN && diff --git a/src/or/circuituse.c b/src/or/circuituse.c index e4e1b8a..be79b30 100644 --- a/src/or/circuituse.c +++ b/src/or/circuituse.c @@ -1185,9 +1185,8 @@ circuit_build_failed(origin_circuit_t *circ) int already_marked = 0; if (circ->_base.n_chan) { n_chan = circ->_base.n_chan; - tor_assert(!(n_chan->is_listener)); - if (n_chan->u.cell_chan.is_bad_for_new_circs) { + if (n_chan->is_bad_for_new_circs) { /* We only want to blame this router when a fresh healthy * connection fails. So don't mark this router as newly failed, * since maybe this was just an old circuit attempt that's @@ -1201,7 +1200,7 @@ circuit_build_failed(origin_circuit_t *circ) "Our circuit failed to get a response from the first hop " "(%s). I'm going to try to rotate to a better connection.", channel_get_canonical_remote_descr(n_chan)); - n_chan->u.cell_chan.is_bad_for_new_circs = 1; + n_chan->is_bad_for_new_circs = 1; } else { log_info(LD_OR, "Our circuit died before the first hop with no connection"); diff --git a/src/or/command.c b/src/or/command.c index 2fb70b5..e175e23 100644 --- a/src/or/command.c +++ b/src/or/command.c @@ -44,7 +44,7 @@ uint64_t stats_n_relay_cells_processed = 0; uint64_t stats_n_destroy_cells_processed = 0; /* Handle an incoming channel */ -static void command_handle_incoming_channel(channel_t *listener, +static void command_handle_incoming_channel(channel_listener_t *listener, channel_t *chan); /* These are the main functions for processing cells */ @@ -190,7 +190,6 @@ command_process_create_cell(cell_t *cell, channel_t *chan) tor_assert(cell); tor_assert(chan); - tor_assert(!(chan->is_listener)); log_debug(LD_OR, "Got a CREATE cell for circ_id %d on channel " U64_FORMAT @@ -223,9 +222,9 @@ command_process_create_cell(cell_t *cell, channel_t *chan) * circ. */ id_is_high = cell->circ_id & (1<<15); if ((id_is_high && - chan->u.cell_chan.circ_id_type == CIRC_ID_TYPE_HIGHER) || + chan->circ_id_type == CIRC_ID_TYPE_HIGHER) || (!id_is_high && - chan->u.cell_chan.circ_id_type == CIRC_ID_TYPE_LOWER)) { + chan->circ_id_type == CIRC_ID_TYPE_LOWER)) { log_fn(LOG_PROTOCOL_WARN, LD_PROTOCOL, "Received create cell with unexpected circ_id %d. Closing.", cell->circ_id); @@ -235,7 +234,7 @@ command_process_create_cell(cell_t *cell, channel_t *chan) } if (circuit_id_in_use_on_channel(cell->circ_id, chan)) { - const node_t *node = node_get_by_id(chan->u.cell_chan.identity_digest); + const node_t *node = node_get_by_id(chan->identity_digest); log_fn(LOG_PROTOCOL_WARN, LD_PROTOCOL, "Received CREATE cell (circID %d) for known circ. " "Dropping (age %d).", @@ -473,7 +472,7 @@ command_process_destroy_cell(cell_t *cell, channel_t *chan) */ static void -command_handle_incoming_channel(channel_t *listener, channel_t *chan) +command_handle_incoming_channel(channel_listener_t *listener, channel_t *chan) { tor_assert(listener); tor_assert(chan); @@ -500,11 +499,11 @@ command_setup_channel(channel_t *chan) */ void -command_setup_listener(channel_t *listener) +command_setup_listener(channel_listener_t *listener) { tor_assert(listener); - tor_assert(listener->state == CHANNEL_STATE_LISTENING); + tor_assert(listener->state == CHANNEL_LISTENER_STATE_LISTENING); - channel_set_listener_fn(listener, command_handle_incoming_channel); + channel_listener_set_listener_fn(listener, command_handle_incoming_channel); } diff --git a/src/or/command.h b/src/or/command.h index eddce87..f9a0ef2 100644 --- a/src/or/command.h +++ b/src/or/command.h @@ -17,7 +17,7 @@ void command_process_cell(channel_t *chan, cell_t *cell); void command_process_var_cell(channel_t *chan, var_cell_t *cell); void command_setup_channel(channel_t *chan); -void command_setup_listener(channel_t *chan); +void command_setup_listener(channel_listener_t *chan_l); extern uint64_t stats_n_padding_cells_processed; extern uint64_t stats_n_create_cells_processed; diff --git a/src/or/connection_edge.c b/src/or/connection_edge.c index 834f970..45f3a06 100644 --- a/src/or/connection_edge.c +++ b/src/or/connection_edge.c @@ -3070,11 +3070,10 @@ connection_exit_begin_conn(cell_t *cell, circuit_t *circ) return 0; } if (or_circ && or_circ->p_chan) { - tor_assert(!(or_circ->p_chan->is_listener)); if (!options->AllowSingleHopExits && (or_circ->is_first_hop || (!connection_or_digest_is_known_relay( - or_circ->p_chan->u.cell_chan.identity_digest) && + or_circ->p_chan->identity_digest) && should_refuse_unknown_exits(options)))) { /* Don't let clients use us as a single-hop proxy, unless the user * has explicitly allowed that in the config. It attracts attackers diff --git a/src/or/connection_or.c b/src/or/connection_or.c index a3df775..bf69711 100644 --- a/src/or/connection_or.c +++ b/src/or/connection_or.c @@ -336,8 +336,7 @@ connection_or_get_num_circuits(or_connection_t *conn) tor_assert(conn); if (conn->chan) { - tor_assert(!(TLS_CHAN_TO_BASE(conn->chan)->is_listener)); - return TLS_CHAN_TO_BASE(conn->chan)->u.cell_chan.n_circuits; + return TLS_CHAN_TO_BASE(conn->chan)->n_circuits; } else return 0; } @@ -1001,8 +1000,6 @@ connection_or_notify_error(or_connection_t *conn, /* Tell the controlling channel if we have one */ if (conn->chan) { chan = TLS_CHAN_TO_BASE(conn->chan); - /* This shouldn't ever happen in the listening state */ - tor_assert(chan->state != CHANNEL_STATE_LISTENING); /* Don't transition if we're already in closing, closed or error */ if (!(chan->state == CHANNEL_STATE_CLOSING || chan->state == CHANNEL_STATE_CLOSED || @@ -1148,8 +1145,6 @@ connection_or_close_normally(or_connection_t *orconn, int flush) else connection_mark_for_close(TO_CONN(orconn)); if (orconn->chan) { chan = TLS_CHAN_TO_BASE(orconn->chan); - /* This shouldn't ever happen in the listening state */ - tor_assert(chan->state != CHANNEL_STATE_LISTENING); /* Don't transition if we're already in closing, closed or error */ if (!(chan->state == CHANNEL_STATE_CLOSING || chan->state == CHANNEL_STATE_CLOSED || @@ -1173,8 +1168,6 @@ connection_or_close_for_error(or_connection_t *orconn, int flush) else connection_mark_for_close(TO_CONN(orconn)); if (orconn->chan) { chan = TLS_CHAN_TO_BASE(orconn->chan); - /* This shouldn't ever happen in the listening state */ - tor_assert(chan->state != CHANNEL_STATE_LISTENING); /* Don't transition if we're already in closing, closed or error */ if (!(chan->state == CHANNEL_STATE_CLOSING || chan->state == CHANNEL_STATE_CLOSED || @@ -1195,7 +1188,8 @@ connection_or_close_for_error(or_connection_t *orconn, int flush) int connection_tls_start_handshake(or_connection_t *conn, int receiving) { - channel_t *chan_listener, *chan; + channel_listener_t *chan_listener; + channel_t *chan; /* Incoming connections will need a new channel passed to the * channel_tls_listener */ @@ -1208,7 +1202,7 @@ connection_tls_start_handshake(or_connection_t *conn, int receiving) command_setup_listener(chan_listener); } chan = channel_tls_handle_incoming(conn); - channel_queue_incoming(chan_listener, chan); + channel_listener_queue_incoming(chan_listener, chan); } connection_or_change_state(conn, OR_CONN_STATE_TLS_HANDSHAKING); diff --git a/src/or/main.c b/src/or/main.c index 2a3e0e1..e0c89a9 100644 --- a/src/or/main.c +++ b/src/or/main.c @@ -1539,6 +1539,7 @@ run_scheduled_events(time_t now) /** 8c. Do channel cleanup just like for connections */ channel_run_cleanup(); + channel_listener_run_cleanup(); /** 9. and if we're a server, check whether our DNS is telling stories to * us. */ @@ -2172,6 +2173,7 @@ dumpstats(int severity) } SMARTLIST_FOREACH_END(conn); channel_dumpstats(severity); + channel_listener_dumpstats(severity); log(severity, LD_NET, "Cells processed: "U64_FORMAT" padding\n" diff --git a/src/or/or.h b/src/or/or.h index 4d2ab21..5987eef 100644 --- a/src/or/or.h +++ b/src/or/or.h @@ -883,6 +883,10 @@ typedef uint16_t streamid_t; typedef struct channel_s channel_t; +/* channel_listener_t typedef; struct channel_listener_s is in channel.h */ + +typedef struct channel_listener_s channel_listener_t; + /* channel states for channel_t */ typedef enum { @@ -892,21 +896,10 @@ typedef enum { * Permitted transitions from: * - CHANNEL_STATE_CLOSING * Permitted transitions to: - * - CHANNEL_STATE_LISTENING * - CHANNEL_STATE_OPENING */ CHANNEL_STATE_CLOSED = 0, /* - * Listening state - channel is listening for incoming connections - * - * Permitted transitions from: - * - CHANNEL_STATE_CLOSED - * Permitted transitions to: - * - CHANNEL_STATE_CLOSING - * - CHANNEL_STATE_ERROR - */ - CHANNEL_STATE_LISTENING, - /* * Opening state - channel is trying to connect * * Permitted transitions from: @@ -957,7 +950,6 @@ typedef enum { * * Permitted transitions from: * - CHANNEL_STATE_CLOSING - * - CHANNEL_STATE_LISTENING * - CHANNEL_STATE_MAINT * - CHANNEL_STATE_OPENING * - CHANNEL_STATE_OPEN @@ -971,6 +963,55 @@ typedef enum { CHANNEL_STATE_LAST } channel_state_t; +/* channel listener states for channel_listener_t */ + +typedef enum { + /* + * Closed state - channel listener is inactive + * + * Permitted transitions from: + * - CHANNEL_LISTENER_STATE_CLOSING + * Permitted transitions to: + * - CHANNEL_LISTENER_STATE_LISTENING + */ + CHANNEL_LISTENER_STATE_CLOSED = 0, + /* + * Listening state - channel listener is listening for incoming + * connections + * + * Permitted transitions from: + * - CHANNEL_LISTENER_STATE_CLOSED + * Permitted transitions to: + * - CHANNEL_LISTENER_STATE_CLOSING + * - CHANNEL_LISTENER_STATE_ERROR + */ + CHANNEL_LISTENER_STATE_LISTENING, + /* + * Closing state - channel listener is shutting down + * + * Permitted transitions from: + * - CHANNEL_LISTENER_STATE_LISTENING + * Permitted transitions to: + * - CHANNEL_LISTENER_STATE_CLOSED, + * - CHANNEL_LISTENER_STATE_ERROR + */ + CHANNEL_LISTENER_STATE_CLOSING, + /* + * Error state - channel listener has experienced a permanent error + * + * Permitted transitions from: + * - CHANNEL_STATE_CLOSING + * - CHANNEL_STATE_LISTENING + * Permitted transitions to: + * - None + */ + CHANNEL_LISTENER_STATE_ERROR, + /* + * Placeholder for maximum state value + */ + CHANNEL_LISTENER_STATE_LAST +} channel_listener_state_t; + /* TLS channel stuff */ typedef struct channel_tls_s channel_tls_t; diff --git a/src/or/relay.c b/src/or/relay.c index 3850562..60f696c 100644 --- a/src/or/relay.c +++ b/src/or/relay.c @@ -1096,8 +1096,7 @@ connection_edge_process_relay_cell(cell_t *cell, circuit_t *circ, * and linked. */ static uint64_t next_id = 0; circ->dirreq_id = ++next_id; - tor_assert(!(TO_OR_CIRCUIT(circ)->p_chan->is_listener)); - TO_OR_CIRCUIT(circ)->p_chan->u.cell_chan.dirreq_id = circ->dirreq_id; + TO_OR_CIRCUIT(circ)->p_chan->dirreq_id = circ->dirreq_id; } return connection_exit_begin_conn(cell, circ); @@ -2179,23 +2178,22 @@ scale_active_circuits(channel_t *chan, unsigned cur_tick) double factor; tor_assert(chan); - tor_assert(!(chan->is_listener)); factor = get_scale_factor( - chan->u.cell_chan.active_circuit_pqueue_last_recalibrated, + chan->active_circuit_pqueue_last_recalibrated, cur_tick); /** Ordinarily it isn't okay to change the value of an element in a heap, * but it's okay here, since we are preserving the order. */ SMARTLIST_FOREACH_BEGIN( - chan->u.cell_chan.active_circuit_pqueue, + chan->active_circuit_pqueue, cell_ewma_t *, e) { tor_assert(e->last_adjusted_tick == - chan->u.cell_chan.active_circuit_pqueue_last_recalibrated); + chan->active_circuit_pqueue_last_recalibrated); e->cell_count *= factor; e->last_adjusted_tick = cur_tick; } SMARTLIST_FOREACH_END(e); - chan->u.cell_chan.active_circuit_pqueue_last_recalibrated = cur_tick; + chan->active_circuit_pqueue_last_recalibrated = cur_tick; } /** Rescale ewma to the same scale as chan, and add it to @@ -2204,15 +2202,14 @@ static void add_cell_ewma_to_chan(channel_t *chan, cell_ewma_t *ewma) { tor_assert(chan); - tor_assert(!(chan->is_listener)); tor_assert(ewma); tor_assert(ewma->heap_index == -1); scale_single_cell_ewma( ewma, - chan->u.cell_chan.active_circuit_pqueue_last_recalibrated); + chan->active_circuit_pqueue_last_recalibrated); - smartlist_pqueue_add(chan->u.cell_chan.active_circuit_pqueue, + smartlist_pqueue_add(chan->active_circuit_pqueue, compare_cell_ewma_counts, STRUCT_OFFSET(cell_ewma_t, heap_index), ewma); @@ -2223,11 +2220,10 @@ static void remove_cell_ewma_from_chan(channel_t *chan, cell_ewma_t *ewma) { tor_assert(chan); - tor_assert(!(chan->is_listener)); tor_assert(ewma); tor_assert(ewma->heap_index != -1); - smartlist_pqueue_remove(chan->u.cell_chan.active_circuit_pqueue, + smartlist_pqueue_remove(chan->active_circuit_pqueue, compare_cell_ewma_counts, STRUCT_OFFSET(cell_ewma_t, heap_index), ewma); @@ -2239,9 +2235,8 @@ static cell_ewma_t * pop_first_cell_ewma_from_chan(channel_t *chan) { tor_assert(chan); - tor_assert(!(chan->is_listener)); - return smartlist_pqueue_pop(chan->u.cell_chan.active_circuit_pqueue, + return smartlist_pqueue_pop(chan->active_circuit_pqueue, compare_cell_ewma_counts, STRUCT_OFFSET(cell_ewma_t, heap_index)); } @@ -2254,7 +2249,6 @@ make_circuit_active_on_chan(circuit_t *circ, channel_t *chan) circuit_t **nextp = NULL, **prevp = NULL; tor_assert(chan); - tor_assert(!(chan->is_listener)); tor_assert(circ); nextp = next_circ_on_chan_p(circ, chan); @@ -2267,11 +2261,11 @@ make_circuit_active_on_chan(circuit_t *circ, channel_t *chan) assert_active_circuits_ok_paranoid(chan); - if (!(chan->u.cell_chan.active_circuits)) { - chan->u.cell_chan.active_circuits = circ; + if (!(chan->active_circuits)) { + chan->active_circuits = circ; *prevp = *nextp = circ; } else { - circuit_t *head = chan->u.cell_chan.active_circuits; + circuit_t *head = chan->active_circuits; circuit_t *old_tail = *prev_circ_on_chan_p(head, chan); *next_circ_on_chan_p(old_tail, chan) = circ; *nextp = head; @@ -2299,7 +2293,6 @@ make_circuit_inactive_on_chan(circuit_t *circ, channel_t *chan) circuit_t *next = NULL, *prev = NULL; tor_assert(chan); - tor_assert(!(chan->is_listener)); tor_assert(circ); nextp = next_circ_on_chan_p(circ, chan); @@ -2319,12 +2312,12 @@ make_circuit_inactive_on_chan(circuit_t *circ, channel_t *chan) tor_assert(*next_circ_on_chan_p(prev, chan) == circ); if (next == circ) { - chan->u.cell_chan.active_circuits = NULL; + chan->active_circuits = NULL; } else { *prev_circ_on_chan_p(next, chan) = prev; *next_circ_on_chan_p(prev, chan) = next; - if (chan->u.cell_chan.active_circuits == circ) - chan->u.cell_chan.active_circuits = next; + if (chan->active_circuits == circ) + chan->active_circuits = next; } *prevp = *nextp = NULL; @@ -2347,9 +2340,8 @@ channel_unlink_all_active_circs(channel_t *chan) circuit_t *head = NULL, *cur = NULL; tor_assert(chan); - tor_assert(!(chan->is_listener)); - cur = head = chan->u.cell_chan.active_circuits; + cur = head = chan->active_circuits; if (! head) return; do { @@ -2358,12 +2350,12 @@ channel_unlink_all_active_circs(channel_t *chan) *next_circ_on_chan_p(cur, chan) = NULL; cur = next; } while (cur != head); - chan->u.cell_chan.active_circuits = NULL; + chan->active_circuits = NULL; - SMARTLIST_FOREACH(chan->u.cell_chan.active_circuit_pqueue, + SMARTLIST_FOREACH(chan->active_circuit_pqueue, cell_ewma_t *, e, e->heap_index = -1); - smartlist_clear(chan->u.cell_chan.active_circuit_pqueue); + smartlist_clear(chan->active_circuit_pqueue); } /** Block (if block is true) or unblock (if block is false) @@ -2440,9 +2432,8 @@ channel_flush_from_first_active_circuit(channel_t *chan, int max) double ewma_increment = -1; tor_assert(chan); - tor_assert(!(chan->is_listener)); - circ = chan->u.cell_chan.active_circuits; + circ = chan->active_circuits; if (!circ) return 0; assert_active_circuits_ok_paranoid(chan); @@ -2453,13 +2444,13 @@ channel_flush_from_first_active_circuit(channel_t *chan, int max) tor_gettimeofday_cached(&now_hires); tick = cell_ewma_tick_from_timeval(&now_hires, &fractional_tick); - if (tick != chan->u.cell_chan.active_circuit_pqueue_last_recalibrated) { + if (tick != chan->active_circuit_pqueue_last_recalibrated) { scale_active_circuits(chan, tick); } ewma_increment = pow(ewma_scale_factor, -fractional_tick); - cell_ewma = smartlist_get(chan->u.cell_chan.active_circuit_pqueue, 0); + cell_ewma = smartlist_get(chan->active_circuit_pqueue, 0); circ = cell_ewma_to_circuit(cell_ewma); } @@ -2511,8 +2502,8 @@ channel_flush_from_first_active_circuit(channel_t *chan, int max) /* If we just flushed our queue and this circuit is used for a * tunneled directory request, possibly advance its state. */ - if (queue->n == 0 && chan->u.cell_chan.dirreq_id) - geoip_change_dirreq_state(chan->u.cell_chan.dirreq_id, + if (queue->n == 0 && chan->dirreq_id) + geoip_change_dirreq_state(chan->dirreq_id, DIRREQ_TUNNELED, DIRREQ_CIRC_QUEUE_FLUSHED); @@ -2534,7 +2525,7 @@ channel_flush_from_first_active_circuit(channel_t *chan, int max) tor_assert(tmp == cell_ewma); add_cell_ewma_to_chan(chan, cell_ewma); } - if (!ewma_enabled && circ != chan->u.cell_chan.active_circuits) { + if (!ewma_enabled && circ != chan->active_circuits) { /* If this happens, the current circuit just got made inactive by * a call in connection_write_to_buf(). That's nothing to worry about: * circuit_make_inactive_on_conn() already advanced chan->active_circuits @@ -2546,7 +2537,7 @@ channel_flush_from_first_active_circuit(channel_t *chan, int max) } tor_assert(*next_circ_on_chan_p(circ, chan)); assert_active_circuits_ok_paranoid(chan); - chan->u.cell_chan.active_circuits = *next_circ_on_chan_p(circ, chan); + chan->active_circuits = *next_circ_on_chan_p(circ, chan); /* Is the cell queue low enough to unblock all the streams that are waiting * to write to this circuit? */ @@ -2701,9 +2692,8 @@ assert_active_circuits_ok(channel_t *chan) int n = 0; tor_assert(chan); - tor_assert(!(chan->is_listener)); - cur = head = chan->u.cell_chan.active_circuits; + cur = head = chan->active_circuits; if (! head) return; @@ -2723,13 +2713,13 @@ assert_active_circuits_ok(channel_t *chan) tor_assert(ewma->is_for_p_chan); } tor_assert(ewma->heap_index != -1); - tor_assert(ewma == smartlist_get(chan->u.cell_chan.active_circuit_pqueue, + tor_assert(ewma == smartlist_get(chan->active_circuit_pqueue, ewma->heap_index)); n++; cur = next; } while (cur != head); - tor_assert(n == smartlist_len(chan->u.cell_chan.active_circuit_pqueue)); + tor_assert(n == smartlist_len(chan->active_circuit_pqueue)); } /** Return 1 if we shouldn't restart reading on this circuit, even if

1 0

[tor/master] Refactor channel_write_cell()/channel_write_packed_cell()/channel_write_var_cell() to eliminate redundant code
by andrea＠torproject.org 10 Oct '12

10 Oct '12

commit 06a76d1db49d7c9c386368583928cde11b509519 Author: Andrea Shepard <andrea(a)torproject.org> Date: Mon Oct 8 21:16:59 2012 -0700 Refactor channel_write_cell()/channel_write_packed_cell()/channel_write_var_cell() to eliminate redundant code --- src/or/channel.c | 217 ++++++++++++++++++++++++++--------------------------- 1 files changed, 106 insertions(+), 111 deletions(-) diff --git a/src/or/channel.c b/src/or/channel.c index 9fbfecb..fac4017 100644 --- a/src/or/channel.c +++ b/src/or/channel.c @@ -74,6 +74,8 @@ static uint64_t n_channels_allocated = 0; */ static digestmap_t *channel_identity_map = NULL; +static int cell_queue_entry_is_padding(cell_queue_entry_t *q); + /* Functions to maintain the digest map */ static void channel_add_to_digest_map(channel_t *chan); static void channel_remove_from_digest_map(channel_t *chan); @@ -85,8 +87,9 @@ static void channel_remove_from_digest_map(channel_t *chan); static ssize_t channel_flush_some_cells_from_outgoing_queue(channel_t *chan, ssize_t num_cells); - static void channel_force_free(channel_t *chan); +static void +channel_write_cell_queue_entry(channel_t *chan, cell_queue_entry_t *q); /*********************************** * Channel state utility functions * @@ -1308,39 +1311,56 @@ channel_set_remote_end(channel_t *chan, } /** - * Write a cell to a channel - * - * Write a fixed-length cell to a channel using the write_cell() method. - * This is equivalent to the pre-channels connection_or_write_cell_to_buf(). - * - * @param chan Channel to write a cell to - * @param cell Cell to write to chan + * Check whether a cell queue entry is padding; this is a helper function + * for channel_write_cell_queue_entry() */ -void -channel_write_cell(channel_t *chan, cell_t *cell) +static int +cell_queue_entry_is_padding(cell_queue_entry_t *q) { - cell_queue_entry_t *q; - int sent = 0; + tor_assert(q); + + if (q->type == CELL_QUEUE_FIXED) { + if (q->u.fixed.cell) { + if (q->u.fixed.cell->command == CELL_PADDING || + q->u.fixed.cell->command == CELL_VPADDING) { + return 1; + } + } + } else if (q->type == CELL_QUEUE_VAR) { + if (q->u.var.var_cell) { + if (q->u.var.var_cell->command == CELL_PADDING || + q->u.var.var_cell->command == CELL_VPADDING) { + return 1; + } + } + } + + return 0; +} + +/** + * Given a cell_queue_entry_t filled out by the caller, try to send the cell + * and queue it if we can't. + */ + +static void +channel_write_cell_queue_entry(channel_t *chan, cell_queue_entry_t *q) +{ + int result = 0, sent = 0; + cell_queue_entry_t *tmp = NULL; tor_assert(chan); tor_assert(!(chan->is_listener)); - tor_assert(cell); - tor_assert(chan->u.cell_chan.write_cell); + tor_assert(q); /* Assert that the state makes sense for a cell write */ tor_assert(chan->state == CHANNEL_STATE_OPENING || chan->state == CHANNEL_STATE_OPEN || chan->state == CHANNEL_STATE_MAINT); - log_debug(LD_CHANNEL, - "Writing cell_t %p to channel %p with global ID " - U64_FORMAT, - cell, chan, U64_PRINTF_ARG(chan->global_identifier)); - /* Increment the timestamp unless it's padding */ - if (!(cell->command == CELL_PADDING || - cell->command == CELL_VPADDING)) { + if (!cell_queue_entry_is_padding(q)) { chan->u.cell_chan.timestamp_last_added_nonpadding = approx_time(); } @@ -1348,7 +1368,31 @@ channel_write_cell(channel_t *chan, cell_t *cell) if (!(chan->u.cell_chan.outgoing_queue && (smartlist_len(chan->u.cell_chan.outgoing_queue) > 0)) && chan->state == CHANNEL_STATE_OPEN) { - if (chan->u.cell_chan.write_cell(chan, cell)) { + /* Pick the right write function for this cell type and save the result */ + switch (q->type) { + case CELL_QUEUE_FIXED: + tor_assert(chan->u.cell_chan.write_cell); + tor_assert(q->u.fixed.cell); + result = chan->u.cell_chan.write_cell(chan, q->u.fixed.cell); + break; + case CELL_QUEUE_PACKED: + tor_assert(chan->u.cell_chan.write_packed_cell); + tor_assert(q->u.packed.packed_cell); + result = chan-> + u.cell_chan.write_packed_cell(chan, + q->u.packed.packed_cell); + break; + case CELL_QUEUE_VAR: + tor_assert(chan->u.cell_chan.write_var_cell); + tor_assert(q->u.var.var_cell); + result = chan->u.cell_chan.write_var_cell(chan, q->u.var.var_cell); + break; + default: + tor_assert(1); + } + + /* Check if we got it out */ + if (result > 0) { sent = 1; /* Timestamp for transmission */ channel_timestamp_xmit(chan); @@ -1363,39 +1407,56 @@ channel_write_cell(channel_t *chan, cell_t *cell) /* Not sent, queue it */ if (!(chan->u.cell_chan.outgoing_queue)) chan->u.cell_chan.outgoing_queue = smartlist_new(); - q = tor_malloc(sizeof(*q)); - q->type = CELL_QUEUE_FIXED; - q->u.fixed.cell = cell; - smartlist_add(chan->u.cell_chan.outgoing_queue, q); + /* + * We have to copy the queue entry passed in, since the caller probably + * used the stack. + */ + tmp = tor_malloc(sizeof(*tmp)); + memcpy(tmp, q, sizeof(*tmp)); + smartlist_add(chan->u.cell_chan.outgoing_queue, tmp); /* Try to process the queue? */ if (chan->state == CHANNEL_STATE_OPEN) channel_flush_cells(chan); } } /** + * Write a cell to a channel + * + * Write a fixed-length cell to a channel using the write_cell() method. + * This is equivalent to the pre-channels connection_or_write_cell_to_buf(). + */ + +void +channel_write_cell(channel_t *chan, cell_t *cell) +{ + cell_queue_entry_t q; + + tor_assert(chan); + tor_assert(cell); + + log_debug(LD_CHANNEL, + "Writing cell_t %p to channel %p with global ID " + U64_FORMAT, + cell, chan, U64_PRINTF_ARG(chan->global_identifier)); + + q.type = CELL_QUEUE_FIXED; + q.u.fixed.cell = cell; + channel_write_cell_queue_entry(chan, &q); +} + +/** * Write a packed cell to a channel * * Write a packed cell to a channel using the write_cell() method. - * - * @param chan Channel to write a cell to - * @param packed_cell Cell to write to chan */ void channel_write_packed_cell(channel_t *chan, packed_cell_t *packed_cell) { - cell_queue_entry_t *q; - int sent = 0; + cell_queue_entry_t q; tor_assert(chan); - tor_assert(!(chan->is_listener)); tor_assert(packed_cell); - tor_assert(chan->u.cell_chan.write_packed_cell); - - /* Assert that the state makes sense for a cell write */ - tor_assert(chan->state == CHANNEL_STATE_OPENING || - chan->state == CHANNEL_STATE_OPEN || - chan->state == CHANNEL_STATE_MAINT); log_debug(LD_CHANNEL, "Writing packed_cell_t %p to channel %p with global ID " @@ -1403,35 +1464,9 @@ channel_write_packed_cell(channel_t *chan, packed_cell_t *packed_cell) packed_cell, chan, U64_PRINTF_ARG(chan->global_identifier)); - /* Increment the timestamp */ - chan->u.cell_chan.timestamp_last_added_nonpadding = approx_time(); - - /* Can we send it right out? If so, try */ - if (!(chan->u.cell_chan.outgoing_queue && - (smartlist_len(chan->u.cell_chan.outgoing_queue) > 0)) && - chan->state == CHANNEL_STATE_OPEN) { - if (chan->u.cell_chan.write_packed_cell(chan, packed_cell)) { - sent = 1; - /* Timestamp for transmission */ - channel_timestamp_xmit(chan); - /* If we're here the queue is empty, so it's drained too */ - channel_timestamp_drained(chan); - /* Update the counter */ - ++(chan->u.cell_chan.n_cells_xmitted); - } - } - - if (!sent) { - /* Not sent, queue it */ - if (!(chan->u.cell_chan.outgoing_queue)) - chan->u.cell_chan.outgoing_queue = smartlist_new(); - q = tor_malloc(sizeof(*q)); - q->type = CELL_QUEUE_PACKED; - q->u.packed.packed_cell = packed_cell; - smartlist_add(chan->u.cell_chan.outgoing_queue, q); - /* Try to process the queue? */ - if (chan->state == CHANNEL_STATE_OPEN) channel_flush_cells(chan); - } + q.type = CELL_QUEUE_PACKED; + q.u.packed.packed_cell = packed_cell; + channel_write_cell_queue_entry(chan, &q); } /** @@ -1440,26 +1475,15 @@ channel_write_packed_cell(channel_t *chan, packed_cell_t *packed_cell) * Write a variable-length cell to a channel using the write_cell() method. * This is equivalent to the pre-channels * connection_or_write_var_cell_to_buf(). - * - * @param chan Channel to write a cell to - * @param var_cell Cell to write to chan */ void channel_write_var_cell(channel_t *chan, var_cell_t *var_cell) { - cell_queue_entry_t *q; - int sent = 0; + cell_queue_entry_t q; tor_assert(chan); - tor_assert(!(chan->is_listener)); tor_assert(var_cell); - tor_assert(chan->u.cell_chan.write_var_cell); - - /* Assert that the state makes sense for a cell write */ - tor_assert(chan->state == CHANNEL_STATE_OPENING || - chan->state == CHANNEL_STATE_OPEN || - chan->state == CHANNEL_STATE_MAINT); log_debug(LD_CHANNEL, "Writing var_cell_t %p to channel %p with global ID " @@ -1467,38 +1491,9 @@ channel_write_var_cell(channel_t *chan, var_cell_t *var_cell) var_cell, chan, U64_PRINTF_ARG(chan->global_identifier)); - /* Increment the timestamp unless it's padding */ - if (!(var_cell->command == CELL_PADDING || - var_cell->command == CELL_VPADDING)) { - chan->u.cell_chan.timestamp_last_added_nonpadding = approx_time(); - } - - /* Can we send it right out? If so, then try */ - if (!(chan->u.cell_chan.outgoing_queue && - (smartlist_len(chan->u.cell_chan.outgoing_queue) > 0)) && - chan->state == CHANNEL_STATE_OPEN) { - if (chan->u.cell_chan.write_var_cell(chan, var_cell)) { - sent = 1; - /* Timestamp for transmission */ - channel_timestamp_xmit(chan); - /* If we're here the queue is empty, so it's drained too */ - channel_timestamp_drained(chan); - /* Update the counter */ - ++(chan->u.cell_chan.n_cells_xmitted); - } - } - - if (!sent) { - /* Not sent, queue it */ - if (!(chan->u.cell_chan.outgoing_queue)) - chan->u.cell_chan.outgoing_queue = smartlist_new(); - q = tor_malloc(sizeof(*q)); - q->type = CELL_QUEUE_VAR; - q->u.var.var_cell = var_cell; - smartlist_add(chan->u.cell_chan.outgoing_queue, q); - /* Try to process the queue? */ - if (chan->state == CHANNEL_STATE_OPEN) channel_flush_cells(chan); - } + q.type = CELL_QUEUE_VAR; + q.u.var.var_cell = var_cell; + channel_write_cell_queue_entry(chan, &q); } /**

1 0

[tor/master] Add magic number for type-checking channel casts
by andrea＠torproject.org 10 Oct '12

10 Oct '12

commit bddfb9ffa85a0fe73545fb231a0847c4101758c1 Author: Andrea Shepard <andrea(a)torproject.org> Date: Tue Oct 9 14:16:51 2012 -0700 Add magic number for type-checking channel casts --- src/or/channel.h | 3 +++ src/or/channeltls.c | 37 +++++++++++++++++++++++++++++++++++-- src/or/channeltls.h | 11 +++++++++-- 3 files changed, 47 insertions(+), 4 deletions(-) diff --git a/src/or/channel.h b/src/or/channel.h index c31806c..27fba8f 100644 --- a/src/or/channel.h +++ b/src/or/channel.h @@ -26,6 +26,9 @@ typedef void (*channel_var_cell_handler_fn_ptr)(channel_t *, var_cell_t *); */ struct channel_s { + /* Magic number for type-checking cast macros */ + uint32_t magic; + /* Current channel state */ channel_state_t state; diff --git a/src/or/channeltls.c b/src/or/channeltls.c index 339663e..5d6a7a9 100644 --- a/src/or/channeltls.c +++ b/src/or/channeltls.c @@ -102,8 +102,9 @@ channel_tls_connect(const tor_addr_t *addr, uint16_t port, const char *id_digest) { channel_tls_t *tlschan = tor_malloc_zero(sizeof(*tlschan)); - channel_t *chan = TLS_CHAN_TO_BASE(tlschan); + channel_t *chan = &(tlschan->_base); channel_init(chan); + chan->magic = TLS_CHAN_MAGIC; chan->state = CHANNEL_STATE_OPENING; chan->close = channel_tls_close_method; chan->describe_transport = channel_tls_describe_transport_method; @@ -233,12 +234,13 @@ channel_t * channel_tls_handle_incoming(or_connection_t *orconn) { channel_tls_t *tlschan = tor_malloc_zero(sizeof(*tlschan)); - channel_t *chan = TLS_CHAN_TO_BASE(tlschan); + channel_t *chan = &(tlschan->_base); tor_assert(orconn); tor_assert(!(orconn->chan)); channel_init(chan); + chan->magic = TLS_CHAN_MAGIC; chan->state = CHANNEL_STATE_OPENING; chan->close = channel_tls_close_method; chan->describe_transport = channel_tls_describe_transport_method; @@ -267,6 +269,37 @@ channel_tls_handle_incoming(or_connection_t *orconn) return chan; } +/********* + * Casts * + ********/ + +/** + * Cast a channel_tls_t to a channel_t. + */ + +channel_t * +channel_tls_to_base(channel_tls_t *tlschan) +{ + if (!tlschan) return NULL; + + return &(tlschan->_base); +} + +/** + * Cast a channel_t to a channel_tls_t, with appropriate type-checking + * asserts. + */ + +channel_tls_t * +channel_tls_from_base(channel_t *chan) +{ + if (!chan) return NULL; + + tor_assert(chan->magic == TLS_CHAN_MAGIC); + + return (channel_tls_t *)(chan); +} + /******************************************** * Method implementations for channel_tls_t * *******************************************/ diff --git a/src/or/channeltls.h b/src/or/channeltls.h index b38e12a..ca2fc88 100644 --- a/src/or/channeltls.h +++ b/src/or/channeltls.h @@ -12,8 +12,10 @@ #include "or.h" #include "channel.h" -#define BASE_CHAN_TO_TLS(c) ((channel_tls_t *)(c)) -#define TLS_CHAN_TO_BASE(c) ((channel_t *)(c)) +#define BASE_CHAN_TO_TLS(c) (channel_tls_from_base((c))) +#define TLS_CHAN_TO_BASE(c) (channel_tls_to_base((c))) + +#define TLS_CHAN_MAGIC 0x8a192427U #ifdef _TOR_CHANNEL_INTERNAL @@ -32,6 +34,11 @@ channel_listener_t * channel_tls_get_listener(void); channel_listener_t * channel_tls_start_listener(void); channel_t * channel_tls_handle_incoming(or_connection_t *orconn); +/* Casts */ + +channel_t * channel_tls_to_base(channel_tls_t *tlschan); +channel_tls_t * channel_tls_from_base(channel_t *chan); + /* Things for connection_or.c to call back into */ ssize_t channel_tls_flush_some_cells(channel_tls_t *chan, ssize_t num_cells); int channel_tls_more_to_flush(channel_tls_t *chan);

1 0

[tor/master] Use circuitmux_t in channels and when relaying cells
by andrea＠torproject.org 10 Oct '12

10 Oct '12

commit b208539b8047a12fb2f1f794c9932fddd577dfdb Author: Andrea Shepard <andrea(a)torproject.org> Date: Fri Sep 21 14:46:22 2012 -0700 Use circuitmux_t in channels and when relaying cells --- src/or/channel.c | 49 ++++++--- src/or/channel.h | 33 ++----- src/or/channeltls.c | 17 ++- src/or/circuitlist.c | 38 ++++++- src/or/connection_or.c | 2 +- src/or/or.h | 42 ++++++-- src/or/relay.c | 283 +++++++++++++++++++++++------------------------- src/or/relay.h | 7 +- 8 files changed, 258 insertions(+), 213 deletions(-) diff --git a/src/or/channel.c b/src/or/channel.c index 334f843..8241556 100644 --- a/src/or/channel.c +++ b/src/or/channel.c @@ -19,6 +19,7 @@ #include "circuitbuild.h" #include "circuitlist.h" #include "connection_or.h" /* For var_cell_free() */ +#include "circuitmux.h" #include "geoip.h" #include "nodelist.h" #include "relay.h" @@ -813,9 +814,10 @@ channel_free(channel_t *chan) channel_clear_remote_end(chan); - if (chan->active_circuit_pqueue) { - smartlist_free(chan->active_circuit_pqueue); - chan->active_circuit_pqueue = NULL; + if (chan->cmux) { + circuitmux_detach_all_circuits(chan->cmux); + circuitmux_free(chan->cmux); + chan->cmux = NULL; } /* We're in CLOSED or ERROR, so the cell queue is already empty */ @@ -866,7 +868,6 @@ channel_force_free(channel_t *chan) if (chan->free) chan->free(chan); channel_clear_remote_end(chan); - smartlist_free(chan->active_circuit_pqueue); /* We might still have a cell queue; kill it */ if (chan->incoming_queue) { @@ -2031,12 +2032,13 @@ channel_flush_some_cells(channel_t *chan, ssize_t num_cells) (unlimited ? -1 : num_cells - flushed)); if (!unlimited && num_cells <= flushed) goto done; - if (chan->active_circuits) { + if (circuitmux_num_cells(chan->cmux) > 0) { /* Try to get more cells from any active circuits */ - num_cells_from_circs = - channel_flush_from_first_active_circuit(chan, - (unlimited ? MAX_CELLS_TO_GET_FROM_CIRCUITS_FOR_UNLIMITED : - (num_cells - flushed))); + num_cells_from_circs = channel_flush_from_first_active_circuit( + chan, + (unlimited ? + MAX_CELLS_TO_GET_FROM_CIRCUITS_FOR_UNLIMITED : + (num_cells - flushed))); /* If it claims we got some, process the queue again */ if (num_cells_from_circs > 0) { @@ -2227,7 +2229,7 @@ channel_more_to_flush(channel_t *chan) smartlist_len(chan->incoming_queue) > 0) return 1; /* Check if any circuits would like to queue some */ - if (chan->active_circuits) return 1; + if (circuitmux_num_cells(chan->cmux) > 0) return 1; /* Else no */ return 0; @@ -2935,8 +2937,8 @@ channel_is_better(time_t now, channel_t *a, channel_t *b, * one that has no circuits is in its grace period. */ - a_has_circs = (a->n_circuits > 0); - b_has_circs = (b->n_circuits > 0); + a_has_circs = (channel_num_circuits(a) > 0); + b_has_circs = (channel_num_circuits(b) > 0); a_grace = (forgive_new_connections && (now < channel_when_created(a) + NEW_CHAN_GRACE_PERIOD)); b_grace = (forgive_new_connections && @@ -3223,9 +3225,10 @@ channel_dump_statistics(channel_t *chan, int severity) " * Channel " U64_FORMAT " has %d active circuits out of" " %d in total", U64_PRINTF_ARG(chan->global_identifier), - (chan->active_circuit_pqueue != NULL) ? - smartlist_len(chan->active_circuit_pqueue) : 0, - chan->n_circuits); + (chan->cmux != NULL) ? + circuitmux_num_active_circuits(chan->cmux) : 0, + (chan->cmux != NULL) ? + circuitmux_num_circuits(chan->cmux) : 0); /* Describe timestamps */ log(severity, LD_GENERAL, @@ -4008,6 +4011,22 @@ channel_matches_target_addr_for_extend(channel_t *chan, } /** + * Return the total number of circuits used by a channel + * + * @param chan Channel to query + * @return Number of circuits using this as n_chan or p_chan + */ + +unsigned int +channel_num_circuits(channel_t *chan) +{ + tor_assert(chan); + + return chan->num_n_circuits + + chan->num_p_circuits; +} + +/** * Set up circuit ID generation * * This is called when setting up a channel and replaces the old diff --git a/src/or/channel.h b/src/or/channel.h index 27fba8f..4d3db41 100644 --- a/src/or/channel.h +++ b/src/or/channel.h @@ -10,6 +10,7 @@ #define _TOR_CHANNEL_H #include "or.h" +#include "circuitmux.h" /* Channel handler function pointer typedefs */ typedef void (*channel_listener_fn_ptr)(channel_listener_t *, channel_t *); @@ -99,7 +100,7 @@ struct channel_s { int (*matches_target)(channel_t *, const tor_addr_t *); /* Write a cell to an open channel */ int (*write_cell)(channel_t *, cell_t *); - /* Write a packed cell to an open channel */ + /* Write a packed cell to an open channel */ int (*write_packed_cell)(channel_t *, packed_cell_t *); /* Write a variable-length cell to an open channel */ int (*write_var_cell)(channel_t *, var_cell_t *); @@ -124,29 +125,8 @@ struct channel_s { /* List of queued outgoing cells */ smartlist_t *outgoing_queue; - /* Circuit stuff for use by relay.c */ - - /* - * Double-linked ring of circuits with queued cells waiting for room to - * free up on this connection's outbuf. Every time we pull cells from - * a circuit, we advance this pointer to the next circuit in the ring. - */ - struct circuit_t *active_circuits; - /* - * Priority queue of cell_ewma_t for circuits with queued cells waiting - * for room to free up on this connection's outbuf. Kept in heap order - * according to EWMA. - * - * This is redundant with active_circuits; if we ever decide only to use - * the cell_ewma algorithm for choosing circuits, we can remove - * active_circuits. - */ - smartlist_t *active_circuit_pqueue; - /* - * The tick on which the cell_ewma_ts in active_circuit_pqueue last had - * their ewma values rescaled. - */ - unsigned active_circuit_pqueue_last_recalibrated; + /* Circuit mux for circuits sending on this channel */ + circuitmux_t *cmux; /* Circuit ID generation stuff for use by circuitbuild.c */ @@ -161,8 +141,8 @@ struct channel_s { */ circid_t next_circ_id; - /* How many circuits use this connection as p_chan or n_chan? */ - int n_circuits; + /* For how many circuits are we n_chan? What about p_chan? */ + unsigned int num_n_circuits, num_p_circuits; /* * True iff this channel shouldn't get any new circs attached to it, @@ -456,6 +436,7 @@ void channel_mark_client(channel_t *chan); int channel_matches_extend_info(channel_t *chan, extend_info_t *extend_info); int channel_matches_target_addr_for_extend(channel_t *chan, const tor_addr_t *target); +unsigned int channel_num_circuits(channel_t *chan); void channel_set_circid_type(channel_t *chan, crypto_pk_t *identity_rcvd); void channel_timestamp_client(channel_t *chan); diff --git a/src/or/channeltls.c b/src/or/channeltls.c index 5d6a7a9..036d14f 100644 --- a/src/or/channeltls.c +++ b/src/or/channeltls.c @@ -16,6 +16,7 @@ #include "or.h" #include "channel.h" #include "channeltls.h" +#include "circuitmux.h" #include "config.h" #include "connection.h" #include "connection_or.h" @@ -127,8 +128,11 @@ channel_tls_connect(const tor_addr_t *addr, uint16_t port, if (is_local_addr(addr)) channel_mark_local(chan); channel_mark_outgoing(chan); - chan->active_circuit_pqueue = smartlist_new(); - chan->active_circuit_pqueue_last_recalibrated = cell_ewma_get_tick(); + chan->cmux = circuitmux_alloc(); + /* TODO get rid of this and set policy once we have them + chan->cmux->active_circuit_pqueue_last_recalibrated = + cell_ewma_get_tick(); + */ /* Set up or_connection stuff */ tlschan->conn = connection_or_connect(addr, port, id_digest, tlschan); @@ -146,7 +150,7 @@ channel_tls_connect(const tor_addr_t *addr, uint16_t port, goto done; err: - smartlist_free(chan->active_circuit_pqueue); + circuitmux_free(chan->cmux); tor_free(tlschan); chan = NULL; @@ -260,8 +264,11 @@ channel_tls_handle_incoming(or_connection_t *orconn) if (is_local_addr(&(TO_CONN(orconn)->addr))) channel_mark_local(chan); channel_mark_incoming(chan); - chan->active_circuit_pqueue = smartlist_new(); - chan->active_circuit_pqueue_last_recalibrated = cell_ewma_get_tick(); + chan->cmux = circuitmux_alloc(); + /* TODO set cmux policy + chan->active_circuit_pqueue_last_recalibrated = + cell_ewma_get_tick(); + */ /* If we got one, we should register it */ if (chan) channel_register(chan); diff --git a/src/or/circuitlist.c b/src/or/circuitlist.c index cf6020d..bec3dc8 100644 --- a/src/or/circuitlist.c +++ b/src/or/circuitlist.c @@ -134,10 +134,20 @@ circuit_set_circid_chan_helper(circuit_t *circ, int direction, found = HT_REMOVE(chan_circid_map, &chan_circid_map, &search); if (found) { tor_free(found); - --old_chan->n_circuits; + if (direction == CELL_DIRECTION_OUT) { + /* One fewer circuits use old_chan as n_chan */ + --(old_chan->num_n_circuits); + } else { + /* One fewer circuits use old_chan as p_chan */ + --(old_chan->num_p_circuits); + } + } + + /* If we're changing channels, detach the circuit */ + if (old_chan != chan) { + tor_assert(old_chan->cmux); + circuitmux_detach_circuit(old_chan->cmux, circ); } - if (was_active && old_chan != chan) - make_circuit_inactive_on_chan(circ, old_chan); } /* Change the values only after we have possibly made the circuit inactive @@ -161,10 +171,26 @@ circuit_set_circid_chan_helper(circuit_t *circ, int direction, found->circuit = circ; HT_INSERT(chan_circid_map, &chan_circid_map, found); } + + /* Attach to the circuitmux if we're changing channels */ + if (old_chan != chan) { + tor_assert(chan->cmux); + circuitmux_attach_circuit(chan->cmux, circ, direction); + } + + /* + * This is a no-op if we have no cells, but if we do it marks us active to + * the circuitmux + */ if (make_active && old_chan != chan) - make_circuit_active_on_chan(circ,chan); + update_circuit_on_cmux(circ, direction); - ++chan->n_circuits; + /* Adjust circuit counts on new channel */ + if (direction == CELL_DIRECTION_OUT) { + ++chan->num_n_circuits; + } else { + ++chan->num_p_circuits; + } } /** Set the p_conn field of a circuit circ, along @@ -994,7 +1020,7 @@ circuit_unlink_all_from_channel(channel_t *chan, int reason) { circuit_t *circ; - channel_unlink_all_active_circs(chan); + channel_unlink_all_circuits(chan); for (circ = global_circuitlist; circ; circ = circ->next) { int mark = 0; diff --git a/src/or/connection_or.c b/src/or/connection_or.c index bf69711..f143e9b 100644 --- a/src/or/connection_or.c +++ b/src/or/connection_or.c @@ -336,7 +336,7 @@ connection_or_get_num_circuits(or_connection_t *conn) tor_assert(conn); if (conn->chan) { - return TLS_CHAN_TO_BASE(conn->chan)->n_circuits; + return channel_num_circuits(TLS_CHAN_TO_BASE(conn->chan)); } else return 0; } diff --git a/src/or/or.h b/src/or/or.h index 87ee7bb..a9b0361 100644 --- a/src/or/or.h +++ b/src/or/or.h @@ -2634,8 +2634,6 @@ typedef struct circuit_t { uint32_t magic; /**< For memory and type debugging: must equal * ORIGIN_CIRCUIT_MAGIC or OR_CIRCUIT_MAGIC. */ - /** Queue of cells waiting to be transmitted on n_conn. */ - cell_queue_t n_chan_cells; /** The channel that is next in this circuit. */ channel_t *n_chan; @@ -2643,13 +2641,36 @@ typedef struct circuit_t { * The circuit_id used in the next (forward) hop of this circuit; * this is unique to n_chan, but this ordered pair is globally * unique: +<<<<<<< HEAD * +======= + * +>>>>>>> f1e8169... Use circuitmux_t in channels and when relaying cells * (n_chan->global_identifier, n_circ_id) */ circid_t n_circ_id; - /** The hop to which we want to extend this circuit. Should be NULL if - * the circuit has attached to a connection. */ + /** + * Circuit mux associated with n_chan to which this circuit is attached; + * NULL if we have no n_chan. + */ + circuitmux_t *mux; + + /** Queue of cells waiting to be transmitted on n_chan */ + cell_queue_t n_chan_cells; + + /** + * The hop to which we want to extend this circuit. Should be NULL if + * the circuit has attached to a connection. + * + * TODO: + * - If this is NULL, we have extended. Is it true that if this is + * NULL then n_chan is not NULL? + * - If n_chan is NULL, then what is n_circ_id? + * - It doesn't matter, because we'll only ever attach to a circuitmux_t + * when n_chan is not NULL, and that's what needs to use a unique ID + * for circuits. + */ extend_info_t *n_hop; /** True iff we are waiting for n_chan_cells to become less full before @@ -2701,6 +2722,15 @@ typedef struct circuit_t { const char *marked_for_close_file; /**< For debugging: in which file was this * circuit marked for close? */ + /** Unique ID for measuring tunneled network status requests. */ + uint64_t dirreq_id; + + /** TODO is this *all* circuits or all circuits on n_chan? */ + struct circuit_t *next; /**< Next circuit in linked list of all circuits. */ + + /** TODO all this from here on down should go away in favor of + * circuitmux_t. + */ /** Next circuit in the doubly-linked ring of circuits waiting to add * cells to n_conn. NULL if we have no cells pending, or if we're not * linked to an OR connection. */ @@ -2709,10 +2739,6 @@ typedef struct circuit_t { * cells to n_conn. NULL if we have no cells pending, or if we're not * linked to an OR connection. */ struct circuit_t *prev_active_on_n_chan; - struct circuit_t *next; /**< Next circuit in linked list of all circuits. */ - - /** Unique ID for measuring tunneled network status requests. */ - uint64_t dirreq_id; /** The EWMA count for the number of cells flushed from the * n_chan_cells queue. Used to determine which circuit to flush from next. diff --git a/src/or/relay.c b/src/or/relay.c index 60f696c..f079243 100644 --- a/src/or/relay.c +++ b/src/or/relay.c @@ -1779,10 +1779,10 @@ circuit_consider_sending_sendme(circuit_t *circ, crypt_path_t *layer_hint) } #ifdef ACTIVE_CIRCUITS_PARANOIA -#define assert_active_circuits_ok_paranoid(conn) \ - assert_active_circuits_ok(conn) +#define assert_cmux_ok_paranoid(chan) \ + assert_cmux_okay(chan) #else -#define assert_active_circuits_ok_paranoid(conn) +#define assert_cmux_ok_paranoid(chan) #endif /** The total number of cells we have allocated from the memory pool. */ @@ -2004,6 +2004,7 @@ prev_circ_on_chan_p(circuit_t *circ, channel_t *chan) } } +#if 0 /** Helper for sorting cell_ewma_t values in their priority queue. */ static int compare_cell_ewma_counts(const void *p1, const void *p2) @@ -2240,122 +2241,61 @@ pop_first_cell_ewma_from_chan(channel_t *chan) compare_cell_ewma_counts, STRUCT_OFFSET(cell_ewma_t, heap_index)); } +#endif -/** Add circ to the list of circuits with pending cells on - * chan. No effect if circ is already linked. */ +/** + * Update the number of cells available on the circuit's n_chan or p_chan's + * circuit mux. + */ void -make_circuit_active_on_chan(circuit_t *circ, channel_t *chan) +update_circuit_on_cmux(circuit_t *circ, cell_direction_t direction) { - circuit_t **nextp = NULL, **prevp = NULL; + channel_t *chan = NULL; + or_circuit_t *or_circ = NULL; + circuitmux_t *cmux = NULL; - tor_assert(chan); tor_assert(circ); - nextp = next_circ_on_chan_p(circ, chan); - prevp = prev_circ_on_chan_p(circ, chan); - - if (*nextp && *prevp) { - /* Already active. */ - return; - } - - assert_active_circuits_ok_paranoid(chan); - - if (!(chan->active_circuits)) { - chan->active_circuits = circ; - *prevp = *nextp = circ; - } else { - circuit_t *head = chan->active_circuits; - circuit_t *old_tail = *prev_circ_on_chan_p(head, chan); - *next_circ_on_chan_p(old_tail, chan) = circ; - *nextp = head; - *prev_circ_on_chan_p(head, chan) = circ; - *prevp = old_tail; - } - - if (circ->n_chan == chan) { - add_cell_ewma_to_chan(chan, &circ->n_cell_ewma); + /* Okay, get the channel */ + if (direction == CELL_DIRECTION_OUT) { + chan = circ->n_chan; } else { - or_circuit_t *orcirc = TO_OR_CIRCUIT(circ); - tor_assert(chan == orcirc->p_chan); - add_cell_ewma_to_chan(chan, &orcirc->p_cell_ewma); + or_circ = TO_OR_CIRCUIT(circ); + chan = or_circ->p_chan; } - assert_active_circuits_ok_paranoid(chan); -} - -/** Remove circ from the list of circuits with pending cells on - * chan. No effect if circ is already unlinked. */ -void -make_circuit_inactive_on_chan(circuit_t *circ, channel_t *chan) -{ - circuit_t **nextp = NULL, **prevp = NULL; - circuit_t *next = NULL, *prev = NULL; - tor_assert(chan); - tor_assert(circ); + tor_assert(chan->cmux); - nextp = next_circ_on_chan_p(circ, chan); - prevp = prev_circ_on_chan_p(circ, chan); - next = *nextp; - prev = *prevp; + /* Now get the cmux */ + cmux = chan->cmux; - if (!next && !prev) { - /* Already inactive. */ - return; - } - - assert_active_circuits_ok_paranoid(chan); - - tor_assert(next && prev); - tor_assert(*prev_circ_on_chan_p(next, chan) == circ); - tor_assert(*next_circ_on_chan_p(prev, chan) == circ); + /* Cmux sanity check */ + tor_assert(circuitmux_is_circuit_attached(cmux, circ)); + tor_assert(circuitmux_attached_circuit_direction(cmux, circ) == direction); - if (next == circ) { - chan->active_circuits = NULL; - } else { - *prev_circ_on_chan_p(next, chan) = prev; - *next_circ_on_chan_p(prev, chan) = next; - if (chan->active_circuits == circ) - chan->active_circuits = next; - } - *prevp = *nextp = NULL; + assert_cmux_ok_paranoid(chan); - if (circ->n_chan == chan) { - remove_cell_ewma_from_chan(chan, &circ->n_cell_ewma); + /* Update the number of cells we have for the circuit mux */ + if (direction == CELL_DIRECTION_OUT) { + circuitmux_set_num_cells(cmux, circ, circ->n_chan_cells.n); } else { - or_circuit_t *orcirc = TO_OR_CIRCUIT(circ); - tor_assert(chan == orcirc->p_chan); - remove_cell_ewma_from_chan(chan, &orcirc->p_cell_ewma); + circuitmux_set_num_cells(cmux, circ, or_circ->p_chan_cells.n); } - assert_active_circuits_ok_paranoid(chan); + assert_cmux_ok_paranoid(chan); } -/** Remove all circuits from the list of circuits with pending cells on - * chan. */ +/** Remove all circuits from the cmux on chan. */ void -channel_unlink_all_active_circs(channel_t *chan) +channel_unlink_all_circuits(channel_t *chan) { - circuit_t *head = NULL, *cur = NULL; - tor_assert(chan); + tor_assert(chan->cmux); - cur = head = chan->active_circuits; - if (! head) - return; - do { - circuit_t *next = *next_circ_on_chan_p(cur, chan); - *prev_circ_on_chan_p(cur, chan) = NULL; - *next_circ_on_chan_p(cur, chan) = NULL; - cur = next; - } while (cur != head); - chan->active_circuits = NULL; - - SMARTLIST_FOREACH(chan->active_circuit_pqueue, - cell_ewma_t *, e, - e->heap_index = -1); - smartlist_clear(chan->active_circuit_pqueue); + circuitmux_detach_all_circuits(chan->cmux); + chan->num_n_circuits = 0; + chan->num_p_circuits = 0; } /** Block (if block is true) or unblock (if block is false) @@ -2419,53 +2359,71 @@ set_streams_blocked_on_circ(circuit_t *circ, channel_t *chan, int channel_flush_from_first_active_circuit(channel_t *chan, int max) { - int n_flushed; + circuitmux_t *cmux = NULL; + int n_flushed = 0; cell_queue_t *queue; circuit_t *circ; + or_circuit_t *or_circ; int streams_blocked; + packed_cell_t *cell; +#if 0 /* The current (hi-res) time */ struct timeval now_hires; /* The EWMA cell counter for the circuit we're flushing. */ cell_ewma_t *cell_ewma = NULL; double ewma_increment = -1; +#endif + /* Get the cmux */ tor_assert(chan); + tor_assert(chan->cmux); + cmux = chan->cmux; + + /* Main loop: pick a circuit, send a cell, update the cmux */ + while (n_flushed < max) { + circ = circuitmux_get_first_active_circuit(cmux); + /* If it returns NULL, no cells left to send */ + if (!circ) break; + assert_cmux_ok_paranoid(chan); + +#if 0 + /* This will go in circuitmux_get_first_active_circuit() */ + /* See if we're doing the ewma circuit selection algorithm. */ + if (ewma_enabled) { + unsigned tick; + double fractional_tick; + tor_gettimeofday_cached(&now_hires); + tick = cell_ewma_tick_from_timeval(&now_hires, &fractional_tick); + + if (tick != chan->active_circuit_pqueue_last_recalibrated) { + scale_active_circuits(chan, tick); + } - circ = chan->active_circuits; - if (!circ) return 0; - assert_active_circuits_ok_paranoid(chan); - - /* See if we're doing the ewma circuit selection algorithm. */ - if (ewma_enabled) { - unsigned tick; - double fractional_tick; - tor_gettimeofday_cached(&now_hires); - tick = cell_ewma_tick_from_timeval(&now_hires, &fractional_tick); + ewma_increment = pow(ewma_scale_factor, -fractional_tick); - if (tick != chan->active_circuit_pqueue_last_recalibrated) { - scale_active_circuits(chan, tick); + cell_ewma = smartlist_get(chan->active_circuit_pqueue, 0); + circ = cell_ewma_to_circuit(cell_ewma); } +#endif - ewma_increment = pow(ewma_scale_factor, -fractional_tick); - - cell_ewma = smartlist_get(chan->active_circuit_pqueue, 0); - circ = cell_ewma_to_circuit(cell_ewma); - } - - if (circ->n_chan == chan) { - queue = &circ->n_chan_cells; - streams_blocked = circ->streams_blocked_on_n_chan; - } else { - queue = &TO_OR_CIRCUIT(circ)->p_chan_cells; - streams_blocked = circ->streams_blocked_on_p_chan; - } - tor_assert(*next_circ_on_chan_p(circ, chan)); + if (circ->n_chan == chan) { + queue = &circ->n_chan_cells; + streams_blocked = circ->streams_blocked_on_n_chan; + } else { + or_circ = TO_OR_CIRCUIT(circ); + tor_assert(or_circ->p_chan == chan); + queue = &TO_OR_CIRCUIT(circ)->p_chan_cells; + streams_blocked = circ->streams_blocked_on_p_chan; + } - for (n_flushed = 0; n_flushed < max && queue->head; ) { - packed_cell_t *cell = cell_queue_pop(queue); - tor_assert(*next_circ_on_chan_p(circ, chan)); + /* + * Get just one cell here; once we've sent it, that can change the circuit + * selection, so we have to loop around for another even if this circuit + * has more than one. + */ + cell = cell_queue_pop(queue); /* Calculate the exact time that this cell has spent in the queue. */ if (get_options()->CellStatistics && !CIRCUIT_IS_ORIGIN(circ)) { @@ -2481,8 +2439,8 @@ channel_flush_from_first_active_circuit(channel_t *chan, int max) "Looks like the CellStatistics option was " "recently enabled."); } else { - or_circuit_t *orcirc = TO_OR_CIRCUIT(circ); insertion_time_elem_t *elem = it_queue->first; + or_circ = TO_OR_CIRCUIT(circ); cell_waiting_time = (uint32_t)((flushed * 10L + SECONDS_IN_A_DAY * 1000L - elem->insertion_time * 10L) % @@ -2495,8 +2453,8 @@ channel_flush_from_first_active_circuit(channel_t *chan, int max) it_queue->last = NULL; mp_pool_release(elem); } - orcirc->total_cell_waiting_time += cell_waiting_time; - orcirc->processed_cells++; + or_circ->total_cell_waiting_time += cell_waiting_time; + or_circ->processed_cells++; } } @@ -2507,14 +2465,34 @@ channel_flush_from_first_active_circuit(channel_t *chan, int max) DIRREQ_TUNNELED, DIRREQ_CIRC_QUEUE_FLUSHED); + /* Now send the cell */ channel_write_packed_cell(chan, cell); + cell = NULL; + /* * Don't packed_cell_free_unchecked(cell) here because the channel will * do so when it gets out of the channel queue (probably already did, in * which case that was an immediate double-free bug). */ + /* Update the counter */ ++n_flushed; + + /* + * Now update the cmux; tell it we've just sent a cell, and how many + * we have left. + */ + circuitmux_notify_xmit_cells(cmux, circ, 1); + circuitmux_set_num_cells(cmux, circ, queue->n); + if (queue->n == 0) + log_debug(LD_GENERAL, "Made a circuit inactive."); + + /* Is the cell queue low enough to unblock all the streams that are waiting + * to write to this circuit? */ + if (streams_blocked && queue->n <= CELL_QUEUE_LOWWATER_SIZE) + set_streams_blocked_on_circ(circ, chan, 0, 0); /* unblock streams */ + +#if 0 if (cell_ewma) { cell_ewma_t *tmp; cell_ewma->cell_count += ewma_increment; @@ -2534,22 +2512,13 @@ channel_flush_from_first_active_circuit(channel_t *chan, int max) assert_active_circuits_ok_paranoid(chan); goto done; } - } - tor_assert(*next_circ_on_chan_p(circ, chan)); - assert_active_circuits_ok_paranoid(chan); - chan->active_circuits = *next_circ_on_chan_p(circ, chan); - - /* Is the cell queue low enough to unblock all the streams that are waiting - * to write to this circuit? */ - if (streams_blocked && queue->n <= CELL_QUEUE_LOWWATER_SIZE) - set_streams_blocked_on_circ(circ, chan, 0, 0); /* unblock streams */ +#endif - /* Did we just run out of cells on this circuit's queue? */ - if (queue->n == 0) { - log_debug(LD_GENERAL, "Made a circuit inactive."); - make_circuit_inactive_on_chan(circ, chan); + /* If n_flushed < max still, loop around and pick another circuit */ } - done: + + /* Okay, we're done sending now */ + assert_cmux_ok_paranoid(chan); return n_flushed; } @@ -2587,11 +2556,11 @@ append_cell_to_circuit_queue(circuit_t *circ, channel_t *chan, set_streams_blocked_on_circ(circ, chan, 1, fromstream); } + update_circuit_on_cmux(circ, direction); if (queue->n == 1) { - /* This was the first cell added to the queue. We need to make this + /* This was the first cell added to the queue. We just made this * circuit active. */ log_debug(LD_GENERAL, "Made a circuit active."); - make_circuit_active_on_chan(circ, chan); } if (!channel_has_queued_writes(chan)) { @@ -2669,20 +2638,37 @@ void circuit_clear_cell_queue(circuit_t *circ, channel_t *chan) { cell_queue_t *queue; + cell_direction_t direction; + if (circ->n_chan == chan) { queue = &circ->n_chan_cells; + direction = CELL_DIRECTION_OUT; } else { or_circuit_t *orcirc = TO_OR_CIRCUIT(circ); tor_assert(orcirc->p_chan == chan); queue = &orcirc->p_chan_cells; + direction = CELL_DIRECTION_IN; } - if (queue->n) - make_circuit_inactive_on_chan(circ, chan); - + /* Clear the queue */ cell_queue_clear(queue); + + /* Update the cell counter in the cmux */ + update_circuit_on_cmux(circ, direction); +} + +/** Fail with an assert if the circuit mux on chan is corrupt + */ +void +assert_circuit_mux_okay(channel_t *chan) +{ + tor_assert(chan); + tor_assert(chan->cmux); + + circuitmux_assert_okay(chan->cmux); } +#if 0 /** Fail with an assert if the active circuits ring on orconn is * corrupt. */ void @@ -2721,6 +2707,7 @@ assert_active_circuits_ok(channel_t *chan) tor_assert(n == smartlist_len(chan->active_circuit_pqueue)); } +#endif /** Return 1 if we shouldn't restart reading on this circuit, even if * we get a SENDME. Else return 0. diff --git a/src/or/relay.h b/src/or/relay.h index 7f96d59..ef5074b 100644 --- a/src/or/relay.h +++ b/src/or/relay.h @@ -51,11 +51,10 @@ void cell_queue_append_packed_copy(cell_queue_t *queue, const cell_t *cell); void append_cell_to_circuit_queue(circuit_t *circ, channel_t *chan, cell_t *cell, cell_direction_t direction, streamid_t fromstream); -void channel_unlink_all_active_circs(channel_t *chan); +void channel_unlink_all_circuits(channel_t *chan); int channel_flush_from_first_active_circuit(channel_t *chan, int max); -void assert_active_circuits_ok(channel_t *chan); -void make_circuit_inactive_on_chan(circuit_t *circ, channel_t *chan); -void make_circuit_active_on_chan(circuit_t *circ, channel_t *chan); +void assert_circuit_mux_okay(channel_t *chan); +void update_circuit_on_cmux(circuit_t *circ, cell_direction_t direction); int append_address_to_payload(uint8_t *payload_out, const tor_addr_t *addr); const uint8_t *decode_address_from_payload(tor_addr_t *addr_out,

1 0

[tor/master] Use cell_queue_entry_new/free() functions in channel.c
by andrea＠torproject.org 10 Oct '12

10 Oct '12

commit 1c3362dcdcf39f4b9da8c71567412349d111d08f Author: Andrea Shepard <andrea(a)torproject.org> Date: Tue Oct 9 11:35:08 2012 -0700 Use cell_queue_entry_new/free() functions in channel.c --- src/or/channel.c | 157 ++++++++++++++++++++++++++++++++++++++++++++++-------- 1 files changed, 135 insertions(+), 22 deletions(-) diff --git a/src/or/channel.c b/src/or/channel.c index 278daa6..e87f4de 100644 --- a/src/or/channel.c +++ b/src/or/channel.c @@ -18,6 +18,7 @@ #include "channeltls.h" #include "circuitbuild.h" #include "circuitlist.h" +#include "connection_or.h" /* For var_cell_free() */ #include "geoip.h" #include "nodelist.h" #include "relay.h" @@ -80,7 +81,13 @@ static uint64_t n_channels_allocated = 0; */ static digestmap_t *channel_identity_map = NULL; +static cell_queue_entry_t * cell_queue_entry_dup(cell_queue_entry_t *q); +static void cell_queue_entry_free(cell_queue_entry_t *q, int handed_off); static int cell_queue_entry_is_padding(cell_queue_entry_t *q); +static cell_queue_entry_t * +cell_queue_entry_new_fixed(cell_t *cell); +static cell_queue_entry_t * +cell_queue_entry_new_var(var_cell_t *var_cell); /* Functions to maintain the digest map */ static void channel_add_to_digest_map(channel_t *chan); @@ -865,7 +872,7 @@ channel_force_free(channel_t *chan) if (chan->incoming_queue) { SMARTLIST_FOREACH_BEGIN(chan->incoming_queue, cell_queue_entry_t *, q) { - tor_free(q); + cell_queue_entry_free(q, 0); } SMARTLIST_FOREACH_END(q); smartlist_free(chan->incoming_queue); @@ -876,12 +883,7 @@ channel_force_free(channel_t *chan) if (chan->outgoing_queue) { SMARTLIST_FOREACH_BEGIN(chan->outgoing_queue, cell_queue_entry_t *, q) { - if (q->type == CELL_QUEUE_PACKED) { - if (q->u.packed.packed_cell) { - packed_cell_free(q->u.packed.packed_cell); - } - } - tor_free(q); + cell_queue_entry_free(q, 0); } SMARTLIST_FOREACH_END(q); smartlist_free(chan->outgoing_queue); @@ -1502,6 +1504,79 @@ channel_set_remote_end(channel_t *chan, } /** + * Duplicate a cell queue entry; this is a shallow copy intended for use + * in channel_write_cell_queue_entry(). + */ + +static cell_queue_entry_t * +cell_queue_entry_dup(cell_queue_entry_t *q) +{ + cell_queue_entry_t *rv = NULL; + + tor_assert(q); + + rv = tor_malloc(sizeof(*rv)); + memcpy(rv, q, sizeof(*rv)); + + return rv; +} + +/** + * Free a cell_queue_entry_t; the handed_off parameter indicates whether + * the contents were passed to the lower layer (it is responsible for + * them) or not (we should free). + */ + +static void +cell_queue_entry_free(cell_queue_entry_t *q, int handed_off) { + if (!q) return; + + if (!handed_off) { + /* + * If we handed it off, the recipient becomes responsible (or + * with packed cells the channel_t subclass calls packed_cell + * free after writing out its contents; see, e.g., + * channel_tls_write_packed_cell_method(). Otherwise, we have + * to take care of it here if possible. + */ + switch (q->type) { + case CELL_QUEUE_FIXED: + if (q->u.fixed.cell) { + /* + * There doesn't seem to be a cell_free() function anywhere in the + * pre-channel code; just use tor_free() + */ + tor_free(q->u.fixed.cell); + } + break; + case CELL_QUEUE_PACKED: + if (q->u.packed.packed_cell) { + packed_cell_free(q->u.packed.packed_cell); + } + break; + case CELL_QUEUE_VAR: + if (q->u.var.var_cell) { + /* + * This one's in connection_or.c; it'd be nice to figure out the + * whole flow of cells from one end to the other and factor the + * cell memory management functions like this out of the specific + * TLS lower layer. + */ + var_cell_free(q->u.var.var_cell); + } + break; + default: + /* + * Nothing we can do if we don't know the type; this will + * have been warned about elsewhere. + */ + break; + } + } + tor_free(q); +} + +/** * Check whether a cell queue entry is padding; this is a helper function * for channel_write_cell_queue_entry() */ @@ -1531,6 +1606,42 @@ cell_queue_entry_is_padding(cell_queue_entry_t *q) } /** + * Allocate a new cell queue entry for a fixed-size cell + */ + +static cell_queue_entry_t * +cell_queue_entry_new_fixed(cell_t *cell) +{ + cell_queue_entry_t *q = NULL; + + tor_assert(cell); + + q = tor_malloc(sizeof(*q)); + q->type = CELL_QUEUE_FIXED; + q->u.fixed.cell = cell; + + return q; +} + +/** + * Allocate a new cell queue entry for a variable-size cell + */ + +static cell_queue_entry_t * +cell_queue_entry_new_var(var_cell_t *var_cell) +{ + cell_queue_entry_t *q = NULL; + + tor_assert(var_cell); + + q = tor_malloc(sizeof(*q)); + q->type = CELL_QUEUE_VAR; + q->u.var.var_cell = var_cell; + + return q; +} + +/** * Write to a channel based on a cell_queue_entry_t * * Given a cell_queue_entry_t filled out by the caller, try to send the cell @@ -1601,8 +1712,7 @@ channel_write_cell_queue_entry(channel_t *chan, cell_queue_entry_t *q) * We have to copy the queue entry passed in, since the caller probably * used the stack. */ - tmp = tor_malloc(sizeof(*tmp)); - memcpy(tmp, q, sizeof(*tmp)); + tmp = cell_queue_entry_dup(q); smartlist_add(chan->outgoing_queue, tmp); /* Try to process the queue? */ if (chan->state == CHANNEL_STATE_OPEN) channel_flush_cells(chan); @@ -1980,10 +2090,11 @@ channel_flush_some_cells_from_outgoing_queue(channel_t *chan, if (q->u.fixed.cell) { if (chan->write_cell(chan, q->u.fixed.cell)) { - tor_free(q); ++flushed; channel_timestamp_xmit(chan); ++(chan->n_cells_xmitted); + cell_queue_entry_free(q, 1); + q = NULL; } /* Else couldn't write it; leave it on the queue */ } else { @@ -1994,17 +2105,19 @@ channel_flush_some_cells_from_outgoing_queue(channel_t *chan, "(global ID " U64_FORMAT ").", chan, U64_PRINTF_ARG(chan->global_identifier)); /* Throw it away */ - tor_free(q); + cell_queue_entry_free(q, 0); + q = NULL; } break; case CELL_QUEUE_PACKED: if (q->u.packed.packed_cell) { if (chan->write_packed_cell(chan, q->u.packed.packed_cell)) { - tor_free(q); ++flushed; channel_timestamp_xmit(chan); ++(chan->n_cells_xmitted); + cell_queue_entry_free(q, 1); + q = NULL; } /* Else couldn't write it; leave it on the queue */ } else { @@ -2015,17 +2128,19 @@ channel_flush_some_cells_from_outgoing_queue(channel_t *chan, "(global ID " U64_FORMAT ").", chan, U64_PRINTF_ARG(chan->global_identifier)); /* Throw it away */ - tor_free(q); + cell_queue_entry_free(q, 0); + q = NULL; } break; case CELL_QUEUE_VAR: if (q->u.var.var_cell) { if (chan->write_var_cell(chan, q->u.var.var_cell)) { - tor_free(q); ++flushed; channel_timestamp_xmit(chan); ++(chan->n_cells_xmitted); + cell_queue_entry_free(q, 1); + q = NULL; } /* Else couldn't write it; leave it on the queue */ } else { @@ -2036,7 +2151,8 @@ channel_flush_some_cells_from_outgoing_queue(channel_t *chan, "(global ID " U64_FORMAT ").", chan, U64_PRINTF_ARG(chan->global_identifier)); /* Throw it away */ - tor_free(q); + cell_queue_entry_free(q, 0); + q = NULL; } break; default: @@ -2046,7 +2162,8 @@ channel_flush_some_cells_from_outgoing_queue(channel_t *chan, "(global ID " U64_FORMAT "; ignoring it." " Someone should fix this.", q->type, chan, U64_PRINTF_ARG(chan->global_identifier)); - tor_free(q); /* tor_free() NULLs it out */ + cell_queue_entry_free(q, 0); + q = NULL; } } else { /* This shouldn't happen; log and throw it away */ @@ -2403,9 +2520,7 @@ channel_queue_cell(channel_t *chan, cell_t *cell) } else { /* Otherwise queue it and then process the queue if possible. */ tor_assert(chan->incoming_queue); - q = tor_malloc(sizeof(*q)); - q->type = CELL_QUEUE_FIXED; - q->u.fixed.cell = cell; + q = cell_queue_entry_new_fixed(cell); log_debug(LD_CHANNEL, "Queueing incoming cell_t %p for channel %p " "(global ID " U64_FORMAT ")", @@ -2465,9 +2580,7 @@ channel_queue_var_cell(channel_t *chan, var_cell_t *var_cell) } else { /* Otherwise queue it and then process the queue if possible. */ tor_assert(chan->incoming_queue); - q = tor_malloc(sizeof(*q)); - q->type = CELL_QUEUE_VAR; - q->u.var.var_cell = var_cell; + q = cell_queue_entry_new_var(var_cell); log_debug(LD_CHANNEL, "Queueing incoming var_cell_t %p for channel %p " "(global ID " U64_FORMAT ")",

1 0

[tor/master] Improve comments on channel_write_*()
by andrea＠torproject.org 10 Oct '12

10 Oct '12

commit f00b44ef8c82eb52fad19fd2218f485f1c5aceca Author: Andrea Shepard <andrea(a)torproject.org> Date: Tue Oct 9 11:38:15 2012 -0700 Improve comments on channel_write_*() --- src/or/channel.c | 11 ++++++++--- 1 files changed, 8 insertions(+), 3 deletions(-) diff --git a/src/or/channel.c b/src/or/channel.c index e87f4de..334f843 100644 --- a/src/or/channel.c +++ b/src/or/channel.c @@ -1723,7 +1723,9 @@ channel_write_cell_queue_entry(channel_t *chan, cell_queue_entry_t *q) * Write a cell to a channel * * Write a fixed-length cell to a channel using the write_cell() method. - * This is equivalent to the pre-channels connection_or_write_cell_to_buf(). + * This is equivalent to the pre-channels connection_or_write_cell_to_buf(); + * it is called by the transport-independent code to deliver a cell to a + * channel for transmission. */ void @@ -1747,7 +1749,9 @@ channel_write_cell(channel_t *chan, cell_t *cell) /** * Write a packed cell to a channel * - * Write a packed cell to a channel using the write_cell() method. + * Write a packed cell to a channel using the write_cell() method. This is + * called by the transport-independent code to deliver a packed cell to a + * channel for transmission. */ void @@ -1774,7 +1778,8 @@ channel_write_packed_cell(channel_t *chan, packed_cell_t *packed_cell) * * Write a variable-length cell to a channel using the write_cell() method. * This is equivalent to the pre-channels - * connection_or_write_var_cell_to_buf(). + * connection_or_write_var_cell_to_buf(); it's called by the transport- + * independent code to deliver a var_cell to a channel for transmission. */ void

1 0

[tor/master] Add circuitmux.c, circuitmux.h
by andrea＠torproject.org 10 Oct '12

10 Oct '12

commit c684076fc7f685d6e0cd97f426d1474749f1da8b Author: Andrea Shepard <andrea(a)torproject.org> Date: Fri Sep 21 14:45:32 2012 -0700 Add circuitmux.c, circuitmux.h --- src/or/Makefile.nmake | 12 ++++---- src/or/circuitmux.c | 67 +++++++++++++++++++++++++++++++++++++++++++++++++ src/or/circuitmux.h | 50 ++++++++++++++++++++++++++++++++++++ src/or/include.am | 2 + src/or/or.h | 13 +++++++++- 5 files changed, 137 insertions(+), 7 deletions(-) diff --git a/src/or/Makefile.nmake b/src/or/Makefile.nmake index b145fdc..9f948d6 100644 --- a/src/or/Makefile.nmake +++ b/src/or/Makefile.nmake @@ -9,12 +9,12 @@ LIBS = ..\..\..\build-alpha\lib\libevent.a \ ws2_32.lib advapi32.lib shell32.lib LIBTOR_OBJECTS = buffers.obj channel.obj channeltls.obj circuitbuild.obj \ - circuitlist.obj circuituse.obj command.obj config.obj connection.obj - connection_edge.obj connection_or.obj control.obj cpuworker.obj \ - directory.obj dirserv.obj dirvote.obj dns.obj dnsserv.obj geoip.obj \ - hibernate.obj main.obj microdesc.obj networkstatus.obj \ - nodelist.obj onion.obj policies.obj reasons.obj relay.obj \ - rendclient.obj rendcommon.obj rendmid.obj rendservice.obj \ + circuitlist.obj circuitmux.obj circuituse.obj command.obj config.obj \ + connection.obj connection_edge.obj connection_or.obj control.obj \ + cpuworker.obj directory.obj dirserv.obj dirvote.obj dns.obj \ + dnsserv.obj geoip.obj hibernate.obj main.obj microdesc.obj \ + networkstatus.obj nodelist.obj onion.obj policies.obj reasons.obj \ + relay.obj rendclient.obj rendcommon.obj rendmid.obj rendservice.obj \ rephist.obj router.obj routerlist.obj routerparse.obj status.obj \ config_codedigest.obj ntmain.obj diff --git a/src/or/circuitmux.c b/src/or/circuitmux.c new file mode 100644 index 0000000..45b72f2 --- /dev/null +++ b/src/or/circuitmux.c @@ -0,0 +1,67 @@ +/* * Copyright (c) 2012, The Tor Project, Inc. */ +/* See LICENSE for licensing information */ + +/** + * \file circuitmux.c + * \brief Circuit mux/cell selection abstraction + **/ + +#include "or.h" +#include "circuitmux.h" + +/* + * A circuitmux is a collection of circuits; it tracks which subset + * of the attached circuits are 'active' (i.e., have cells available + * to transmit) and how many cells on each. It expoes three distinct + * interfaces to other components: + * + * To channels, which each have a circuitmux_t, the supported operations + * are: + * + * circuitmux_flush_cells(): + * + * Retrieve a cell from one of the active circuits, chosen according to + * the circuitmux_t's cell selection policy. + * + * circuitmux_unlink_all(): + * + * The channel is closing down, all circuits must be detached. + * + * To circuits, the exposed operations are: + * + * TODO + * + * To circuit selection policies, the exposed operations are: + * + * TODO + * + * General status inquiries? + * + */ + +struct circuitmux_s { + /* + * Double-linked ring of circuits with queued cells waiting for room to + * free up on this connection's outbuf. Every time we pull cells from + * a circuit, we advance this pointer to the next circuit in the ring. + */ + struct circuit_t *active_circuits; + + /* + * Priority queue of cell_ewma_t for circuits with queued cells waiting + * for room to free up on this connection's outbuf. Kept in heap order + * according to EWMA. + * + * This is redundant with active_circuits; if we ever decide only to use + * the cell_ewma algorithm for choosing circuits, we can remove + * active_circuits. + */ + smartlist_t *active_circuit_pqueue; + + /* + * The tick on which the cell_ewma_ts in active_circuit_pqueue last had + * their ewma values rescaled. + */ + unsigned active_circuit_pqueue_last_recalibrated; +}; + diff --git a/src/or/circuitmux.h b/src/or/circuitmux.h new file mode 100644 index 0000000..c5f9526 --- /dev/null +++ b/src/or/circuitmux.h @@ -0,0 +1,50 @@ +/* * Copyright (c) 2012, The Tor Project, Inc. */ +/* See LICENSE for licensing information */ + +/** + * \file circuitmux.h + * \brief Header file for circuitmux.c + **/ + +#ifndef _TOR_CIRCUITMUX_H +#define _TOR_CIRCUITMUX_H + +#include "or.h" + +/* Consistency check */ +void circuitmux_assert_okay(circuitmux_t *cmux); + +/* Create/destroy */ +circuitmux_t * circuitmux_alloc(void); +void circuitmux_detach_all_circuits(circuitmux_t *cmux); +void circuitmux_free(circuitmux_t *cmux); + +/* Status inquiries */ +cell_direction_t circuitmux_attached_circuit_direction( + circuitmux_t *cmux, + circuit_t *circ); +int circuitmux_is_circuit_attached(circuitmux_t *cmux, circuit_t *circ); +int circuitmux_is_circuit_active(circuitmux_t *cmux, circuit_t *circ); +unsigned int circuitmux_num_cells_for_circuit(circuitmux_t *cmux, + circuit_t *circ); +unsigned int circuitmux_num_cells(circuitmux_t *cmux); +unsigned int circuitmux_num_circuits(circuitmux_t *cmux); +unsigned int circuitmux_num_active_circuits(circuitmux_t *cmux); + +/* Channel interface */ +circuit_t * circuitmux_get_first_active_circuit(circuitmux_t *cmux); +void circuitmux_notify_xmit_cells(circuitmux_t *cmux, circuit_t *circ, + unsigned int n_cells); + +/* Circuit interface */ +void circuitmux_attach_circuit(circuitmux_t *cmux, circuit_t *circ, + cell_direction_t direction); +void circuitmux_detach_circuit(circuitmux_t *cmux, circuit_t *circ); +void circuitmux_clear_num_cells(circuitmux_t *cmux, circuit_t *circ); +void circuitmux_add_to_num_cells(circuitmux_t *cmux, circuit_t *circ, + unsigned int n_cells); +void circuitmux_set_num_cells(circuitmux_t *cmux, circuit_t *circ, + unsigned int n_cells); + +#endif /* _TOR_CIRCUITMUX_H */ + diff --git a/src/or/include.am b/src/or/include.am index c323575..3ec94e5 100644 --- a/src/or/include.am +++ b/src/or/include.am @@ -21,6 +21,7 @@ src_or_libtor_a_SOURCES = \ src/or/channeltls.c \ src/or/circuitbuild.c \ src/or/circuitlist.c \ + src/or/circuitmux.c \ src/or/circuituse.c \ src/or/command.c \ src/or/config.c \ @@ -92,6 +93,7 @@ ORHEADERS = \ src/or/channeltls.h \ src/or/circuitbuild.h \ src/or/circuitlist.h \ + src/or/circuitmux.h \ src/or/circuituse.h \ src/or/command.h \ src/or/config.h \ diff --git a/src/or/or.h b/src/or/or.h index 5987eef..87ee7bb 100644 --- a/src/or/or.h +++ b/src/or/or.h @@ -1016,6 +1016,10 @@ typedef enum { typedef struct channel_tls_s channel_tls_t; +/* circuitmux_t typedef; struct circuitmux_s is in circuitmux.h */ + +typedef struct circuitmux_s circuitmux_t; + /** Parsed onion routing cell. All communication between nodes * is via cells. */ typedef struct cell_t { @@ -2634,7 +2638,14 @@ typedef struct circuit_t { cell_queue_t n_chan_cells; /** The channel that is next in this circuit. */ channel_t *n_chan; - /** The circuit_id used in the next (forward) hop of this circuit. */ + + /** + * The circuit_id used in the next (forward) hop of this circuit; + * this is unique to n_chan, but this ordered pair is globally + * unique: + * + * (n_chan->global_identifier, n_circ_id) + */ circid_t n_circ_id; /** The hop to which we want to extend this circuit. Should be NULL if

1 0

[tor/master] Implement circuitmux_alloc()/circuitmux_free() and chanid/circid->muxinfo hash table
by andrea＠torproject.org 10 Oct '12

10 Oct '12

commit e4a11b890e7c5fe45dc1f5f271fbd8130ccc9c55 Author: Andrea Shepard <andrea(a)torproject.org> Date: Mon Sep 24 08:52:05 2012 -0700 Implement circuitmux_alloc()/circuitmux_free() and chanid/circid->muxinfo hash table --- src/or/circuitmux.c | 144 ++++++++++++++++++++++++++++++++++++++++++++++++++- 1 files changed, 143 insertions(+), 1 deletions(-) diff --git a/src/or/circuitmux.c b/src/or/circuitmux.c index 45b72f2..d4866ca 100644 --- a/src/or/circuitmux.c +++ b/src/or/circuitmux.c @@ -10,6 +10,33 @@ #include "circuitmux.h" /* + * Private typedefs for circuitmux.c + */ + +/* + * Map of muxinfos for circuitmux_t to use; struct is defined below (name + * of struct must match HT_HEAD line). + */ +typedef struct chanid_circid_muxinfo_map chanid_circid_muxinfo_map_t; + +/* + * Hash table entry (yeah, calling it chanid_circid_muxinfo_s seems to + * break the hash table code). + */ +typedef struct chanid_circid_muxinfo_t chanid_circid_muxinfo_t; + +/* + * Anything the mux wants to store per-circuit in the map; right now just + * a count of queued cells. + */ + +typedef struct circuit_muxinfo_s circuit_muxinfo_t; + +/* + * Structures for circuitmux.c + */ + +/* * A circuitmux is a collection of circuits; it tracks which subset * of the attached circuits are 'active' (i.e., have cells available * to transmit) and how many cells on each. It expoes three distinct @@ -40,6 +67,14 @@ */ struct circuitmux_s { + /* Keep count of attached, active circuits */ + unsigned int n_circuits, n_active_circuits; + + /* + * Map from (channel ID, circuit ID) pairs to circuit_muxinfo_t + */ + chanid_circid_muxinfo_map_t *chanid_circid_map; + /* * Double-linked ring of circuits with queued cells waiting for room to * free up on this connection's outbuf. Every time we pull cells from @@ -62,6 +97,113 @@ struct circuitmux_s { * The tick on which the cell_ewma_ts in active_circuit_pqueue last had * their ewma values rescaled. */ - unsigned active_circuit_pqueue_last_recalibrated; + unsigned int active_circuit_pqueue_last_recalibrated; +}; + +/* + * This struct holds whatever we want to store per attached circuit on a + * circuitmux_t; right now, just the count of queued cells. + */ + +struct circuit_muxinfo_s { + unsigned int cell_count; +}; + +/* + * A map from channel ID and circuit ID to a circuit_muxinfo_t for that + * circuit. + */ + +struct chanid_circid_muxinfo_t { + HT_ENTRY(chanid_circid_muxinfo_t) node; + uint64_t chan_id; + circid_t circ_id; + circuit_muxinfo_t muxinfo; }; +/* + * Static function declarations + */ + +static INLINE int +chanid_circid_entries_eq(chanid_circid_muxinfo_t *a, + chanid_circid_muxinfo_t *b); +static INLINE unsigned int +chanid_circid_entry_hash(chanid_circid_muxinfo_t *a); + +/* Function definitions */ + +/** + * Helper for chanid_circid_cell_count_map_t hash table: compare the channel + * ID and circuit ID for a and b, and return less than, equal to, or greater + * than zero appropriately. + */ + +static INLINE int +chanid_circid_entries_eq(chanid_circid_muxinfo_t *a, + chanid_circid_muxinfo_t *b) +{ + return a->chan_id == b->chan_id && a->circ_id == b->circ_id; +} + +/** + * Helper: return a hash based on circuit ID and channel ID in a. + */ + +static INLINE unsigned int +chanid_circid_entry_hash(chanid_circid_muxinfo_t *a) +{ + return (((unsigned int)(a->circ_id) << 8) ^ + ((unsigned int)((a->chan_id >> 32) & 0xffffffff)) ^ + ((unsigned int)(a->chan_id & 0xffffffff))); +} + +/* Declare the struct chanid_circid_muxinfo_map type */ +HT_HEAD(chanid_circid_muxinfo_map, chanid_circid_muxinfo_t); + +/* Emit a bunch of hash table stuff */ +HT_PROTOTYPE(chanid_circid_muxinfo_map, chanid_circid_muxinfo_t, node, + chanid_circid_entry_hash, chanid_circid_entries_eq); +HT_GENERATE(chanid_circid_muxinfo_map, chanid_circid_muxinfo_t, node, + chanid_circid_entry_hash, chanid_circid_entries_eq, 0.6, + malloc, realloc, free); + +/** + * Allocate a new circuitmux_t + */ + +circuitmux_t * +circuitmux_alloc(void) +{ + circuitmux_t *rv = NULL; + + rv = tor_malloc_zero(sizeof(*rv)); + rv->chanid_circid_map = tor_malloc_zero(sizeof(*( rv->chanid_circid_map))); + HT_INIT(chanid_circid_muxinfo_map, rv->chanid_circid_map); + + return rv; +} + +/** + * Free a circuitmux_t; the circuits must be detached first with + * circuitmux_detach_all_circuits(). + */ + +void +circuitmux_free(circuitmux_t *cmux) +{ + if (!cmux) return; + + tor_assert(cmux->n_circuits == 0); + tor_assert(cmux->n_active_circuits == 0); + + smartlist_free(cmux->active_circuit_pqueue); + + if (cmux->chanid_circid_map) { + HT_CLEAR(chanid_circid_muxinfo_map, cmux->chanid_circid_map); + tor_free(cmux->chanid_circid_map); + } + + tor_free(cmux); +} +

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[tor/master] Implement circuitmux_detach_circuit() in circuitmux.c
by andrea＠torproject.org 10 Oct '12

10 Oct '12

commit c3ebd0340cca67dc4dd44bd18849100ebba39051 Author: Andrea Shepard <andrea(a)torproject.org> Date: Wed Sep 26 11:40:33 2012 -0700 Implement circuitmux_detach_circuit() in circuitmux.c --- src/or/circuitmux.c | 98 +++++++++++++++----------------------------------- 1 files changed, 30 insertions(+), 68 deletions(-) diff --git a/src/or/circuitmux.c b/src/or/circuitmux.c index 629fbcf..2a7d075 100644 --- a/src/or/circuitmux.c +++ b/src/or/circuitmux.c @@ -443,98 +443,60 @@ circuitmux_attach_circuit(circuitmux_t *cmux, circuit_t *circ, } } -/* - * Circuitmux/circuit attachment status inquiry functions - */ - /** - * Query the direction of an attached circuit + * Detach a circuit from a circuitmux and update all counters as needed; + * no-op if not attached. */ -cell_direction_t -circuitmux_attached_circuit_direction(circuitmux_t *cmux, circuit_t *circ) +void +circuitmux_detach_circuit(circuitmux_t *cmux, circuit_t *circ) { - chanid_circid_muxinfo_t *hashent = NULL; - - /* Try to find a map entry */ - hashent = circuitmux_find_map_entry(cmux, circ); - + chanid_circid_muxinfo_t search, *hashent = NULL; /* - * This function should only be called on attached circuits; assert that - * we had a map entry. + * Use this to keep track of whether we found it for n_chan or + * p_chan for consistency checking. */ - tor_assert(hashent); - - /* Return the direction from the map entry */ - return hashent->muxinfo.direction; -} - -/** - * Find an entry in the cmux's map for this circuit or return NULL if there - * is none. - */ + cell_direction_t last_searched_direction; -static chanid_circid_muxinfo_t * -circuitmux_find_map_entry(circuitmux_t *cmux, circuit_t *circ) -{ - chanid_circid_muxinfo_t search, *hashent = NULL; - - /* Sanity-check parameters */ tor_assert(cmux); tor_assert(cmux->chanid_circid_map); tor_assert(circ); tor_assert(circ->n_chan); - /* Okay, let's see if it's attached for n_chan/n_circ_id */ + /* See if we have it for n_chan/n_circ_id */ search.chan_id = circ->n_chan->global_identifier; search.circ_id = circ->n_circ_id; + hashent = HT_REMOVE(chanid_circid_muxinfo_map, cmux->chanid_circid_map, + &search); + last_searched_direction = CELL_DIRECTION_OUT; - /* Query */ - hashent = HT_FIND(chanid_circid_muxinfo_map, cmux->chanid_circid_map, - &search); - - /* Found something? */ - if (hashent) { - /* - * Assert that the direction makes sense for a hashent we found by - * n_chan/n_circ_id before we return it. - */ - tor_assert(hashent->muxinfo.direction == CELL_DIRECTION_OUT); - } else { - /* Not there, have we got a p_chan/p_circ_id to try? */ + /* Got one? If not, see if it's an or_circuit_t and try p_chan/p_circ_id */ + if (!hashent) { if (circ->magic == OR_CIRCUIT_MAGIC) { search.circ_id = TO_OR_CIRCUIT(circ)->p_circ_id; - /* Check for p_chan */ if (TO_OR_CIRCUIT(circ)->p_chan) { search.chan_id = TO_OR_CIRCUIT(circ)->p_chan->global_identifier; - /* Okay, search for that */ - hashent = HT_FIND(chanid_circid_muxinfo_map, cmux->chanid_circid_map, - &search); - /* Find anything? */ - if (hashent) { - /* Assert that the direction makes sense before we return it */ - tor_assert(hashent->muxinfo.direction == CELL_DIRECTION_IN); - } + hashent = HT_REMOVE(chanid_circid_muxinfo_map, + cmux->chanid_circid_map, + &search); + last_searched_direction = CELL_DIRECTION_IN; } } } - /* Okay, hashent is it if it was there */ - return hashent; -} - -/** - * Query whether a circuit is attached to a circuitmux - */ - -int -circuitmux_is_circuit_attached(circuitmux_t *cmux, circuit_t *circ) -{ - chanid_circid_muxinfo_t *hashent = NULL; + /* If hashent isn't NULL, we just removed it from the map */ + if (hashent) { + /* Update counters */ + --(cmux->n_circuits); + if (hashent->muxinfo.cell_count > 0) --(cmux->n_active_circuits); + cmux->n_cells -= hashent->muxinfo.cell_count; + /* TODO update active_circuits / active_circuit_pqueue */ - /* Look if it's in the circuit map */ - hashent = circuitmux_find_map_entry(cmux, circ); + /* Consistency check: the direction must match the direction searched */ + tor_assert(last_searched_direction == hashent->muxinfo.direction); - return (hashent != NULL); + /* Free the hash entry */ + tor_free(hashent); + } }

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tor-commits October 2012