commit 6009c891655748eb2089afa8bc4a3d54ec2ddab9 Author: George Kadianakis desnacked@riseup.net Date: Mon May 22 14:10:38 2017 +0300

Set guard state on bridge descriptor fetches.

We used to not set the guard state in launch_direct_bridge_descriptor_fetch(). So when a bridge descriptor fetch failed, the guard subsystem would never learn about the fail (and hence the guard's reachability state would not be updated). --- changes/bug21969 | 3 +++ src/or/bridges.c | 6 +++++- src/or/entrynodes.c | 28 ++++++++++++++++++++++++++++ src/or/entrynodes.h | 4 ++++ 4 files changed, 40 insertions(+), 1 deletion(-)

diff --git a/changes/bug21969 b/changes/bug21969 new file mode 100644 index 0000000..9b116fc --- /dev/null +++ b/changes/bug21969 @@ -0,0 +1,3 @@ + o Major bugfixes (entry guards): + - Don't block bootstrapping when a primary bridge is offline and we can't + get its descriptor. Fixes bug 21969; bugfix on 0.3.0.3-alpha. diff --git a/src/or/bridges.c b/src/or/bridges.c index 58375ca..0b45883 100644 --- a/src/or/bridges.c +++ b/src/or/bridges.c @@ -547,6 +547,7 @@ static void launch_direct_bridge_descriptor_fetch(bridge_info_t *bridge) { const or_options_t *options = get_options(); + circuit_guard_state_t *guard_state = NULL;

if (connection_get_by_type_addr_port_purpose( CONN_TYPE_DIR, &bridge->addr, bridge->port, @@ -570,12 +571,15 @@ launch_direct_bridge_descriptor_fetch(bridge_info_t *bridge) return; }

+ guard_state = get_guard_state_for_bridge_desc_fetch(bridge->identity); + directory_initiate_command(&bridge->addr, bridge->port, NULL, 0, /*no dirport*/ bridge->identity, DIR_PURPOSE_FETCH_SERVERDESC, ROUTER_PURPOSE_BRIDGE, - DIRIND_ONEHOP, "authority.z", NULL, 0, 0, NULL); + DIRIND_ONEHOP, "authority.z", NULL, 0, 0, + guard_state); }

/** Fetching the bridge descriptor from the bridge authority returned a diff --git a/src/or/entrynodes.c b/src/or/entrynodes.c index 5b5e13b..f8c7024 100644 --- a/src/or/entrynodes.c +++ b/src/or/entrynodes.c @@ -2926,6 +2926,34 @@ entry_guard_get_by_id_digest(const char *digest) get_guard_selection_info(), digest); }

+/** We are about to connect to bridge with identity <b>digest</b> to fetch its + * descriptor. Create a new guard state for this connection and return it. */ +circuit_guard_state_t * +get_guard_state_for_bridge_desc_fetch(const char *digest) +{ + circuit_guard_state_t *guard_state = NULL; + entry_guard_t *guard = NULL; + + guard = entry_guard_get_by_id_digest_for_guard_selection( + get_guard_selection_info(), digest); + if (!guard) { + return NULL; + } + + /* Update the guard last_tried_to_connect time since it's checked by the + * guard susbsystem. */ + guard->last_tried_to_connect = approx_time(); + + /* Create the guard state */ + guard_state = tor_malloc_zero(sizeof(circuit_guard_state_t)); + guard_state->guard = entry_guard_handle_new(guard); + guard_state->state = GUARD_CIRC_STATE_USABLE_ON_COMPLETION; + guard_state->state_set_at = approx_time(); + guard_state->restrictions = NULL; + + return guard_state; +} + /** Release all storage held by <b>e</b>. */ STATIC void entry_guard_free(entry_guard_t *e) diff --git a/src/or/entrynodes.h b/src/or/entrynodes.h index f02901f..c2ddeca 100644 --- a/src/or/entrynodes.h +++ b/src/or/entrynodes.h @@ -323,6 +323,10 @@ const node_t *guards_choose_dirguard(circuit_guard_state_t **guard_state_out); entry_guard_t *entry_guard_get_by_id_digest_for_guard_selection( guard_selection_t *gs, const char *digest); entry_guard_t *entry_guard_get_by_id_digest(const char *digest); + +circuit_guard_state_t * +get_guard_state_for_bridge_desc_fetch(const char *digest); + void entry_guards_changed_for_guard_selection(guard_selection_t *gs); void entry_guards_changed(void); guard_selection_t * get_guard_selection_info(void);