commit 935f84bd40f51dc7d4b6477ade37d72ecda7e407 Author: Nick Mathewson nickm@torproject.org Date: Mon Jul 3 16:14:48 2017 -0400

Split circuit_send_next_onion_skin() into its three main cases.

This commit is designed to have a very small diff. Therefore, the indentation is wrong. The next commit will fix that. --- src/or/circuitbuild.c | 51 +++++++++++++++++++++++++++++++++++++-------------- 1 file changed, 37 insertions(+), 14 deletions(-)

diff --git a/src/or/circuitbuild.c b/src/or/circuitbuild.c index 833c0b9..21ed038 100644 --- a/src/or/circuitbuild.c +++ b/src/or/circuitbuild.c @@ -74,6 +74,10 @@ static int onion_pick_cpath_exit(origin_circuit_t *circ, extend_info_t *exit); static crypt_path_t *onion_next_hop_in_cpath(crypt_path_t *cpath); static int onion_extend_cpath(origin_circuit_t *circ); static int onion_append_hop(crypt_path_t **head_ptr, extend_info_t *choice); +static int circuit_send_first_onion_skin(origin_circuit_t *circ); +static int circuit_build_no_more_hops(origin_circuit_t *circ); +static int circuit_send_intermediate_onion_skin(origin_circuit_t *circ, + crypt_path_t *hop);

/** This function tries to get a channel to the specified endpoint, * and then calls command_setup_channel() to give it the right @@ -920,12 +924,28 @@ circuit_purpose_may_omit_guard(int purpose) int circuit_send_next_onion_skin(origin_circuit_t *circ) { - crypt_path_t *hop; - const node_t *node;

tor_assert(circ);

if (circ->cpath->state == CPATH_STATE_CLOSED) { + return circuit_send_first_onion_skin(circ); + } else { + tor_assert(circ->cpath->state == CPATH_STATE_OPEN); + tor_assert(circ->base_.state == CIRCUIT_STATE_BUILDING); + log_debug(LD_CIRC,"starting to send subsequent skin."); + crypt_path_t *hop = onion_next_hop_in_cpath(circ->cpath); + if (!hop) { + return circuit_build_no_more_hops(circ); + } else { + return circuit_send_intermediate_onion_skin(circ, hop); + } + } +} + +static int +circuit_send_first_onion_skin(origin_circuit_t *circ) +{ + const node_t *node; /* This is the first hop. */ create_cell_t cc; int fast; @@ -980,15 +1000,12 @@ circuit_send_next_onion_skin(origin_circuit_t *circ) log_info(LD_CIRC,"First hop: finished sending %s cell to '%s'", fast ? "CREATE_FAST" : "CREATE", node ? node_describe(node) : "<unnamed>"); - } else { - extend_cell_t ec; - int len; - tor_assert(circ->cpath->state == CPATH_STATE_OPEN); - tor_assert(circ->base_.state == CIRCUIT_STATE_BUILDING); - log_debug(LD_CIRC,"starting to send subsequent skin."); - hop = onion_next_hop_in_cpath(circ->cpath); - memset(&ec, 0, sizeof(ec)); - if (!hop) { + return 0; +} + +static int +circuit_build_no_more_hops(origin_circuit_t *circ) +{ /* done building the circuit. whew. */ guard_usable_t r; if (! circ->guard_state) { @@ -1090,8 +1107,15 @@ circuit_send_next_onion_skin(origin_circuit_t *circ) circuit_mark_for_close(TO_CIRCUIT(circ), END_CIRC_REASON_FINISHED); } return 0; - } +}

+static int +circuit_send_intermediate_onion_skin(origin_circuit_t *circ, + crypt_path_t *hop) +{ + extend_cell_t ec; + int len; + memset(&ec, 0, sizeof(ec)); if (tor_addr_family(&hop->extend_info->addr) != AF_INET) { log_warn(LD_BUG, "Trying to extend to a non-IPv4 address."); return - END_CIRC_REASON_INTERNAL; @@ -1139,8 +1163,7 @@ circuit_send_next_onion_skin(origin_circuit_t *circ) return 0; /* circuit is closed */ } hop->state = CPATH_STATE_AWAITING_KEYS; - } - return 0; + return 0; }

/** Our clock just jumped by <b>seconds_elapsed</b>. Assume