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relay: Split out opening a connection for an extend
Part of 33633.
This commit is contained in:
parent
2640030b10
commit
ca9565b9f7
@ -156,6 +156,47 @@ circuit_extend_lspec_valid_helper(const extend_cell_t *ec,
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return 0;
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}
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/* When there is no open channel for an extend cell <b>ec</b>, set up the
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* circuit <b>circ</b> to wait for a new connection. If <b>should_launch</b>
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* is true, open a new connection. (Otherwise, we are already waiting for a
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* new connection to the same relay.)
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*
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* Always returns 0.
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*/
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static int
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circuit_open_connection_for_extend(const extend_cell_t *ec,
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struct circuit_t *circ,
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int should_launch)
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{
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circ->n_hop = extend_info_new(NULL /*nickname*/,
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(const char*)ec->node_id,
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&ec->ed_pubkey,
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NULL, /*onion_key*/
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NULL, /*curve25519_key*/
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&ec->orport_ipv4.addr,
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ec->orport_ipv4.port);
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circ->n_chan_create_cell = tor_memdup(&ec->create_cell,
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sizeof(ec->create_cell));
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circuit_set_state(circ, CIRCUIT_STATE_CHAN_WAIT);
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if (should_launch) {
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/* we should try to open a connection */
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channel_t *n_chan = channel_connect_for_circuit(&ec->orport_ipv4.addr,
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ec->orport_ipv4.port,
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(const char*)ec->node_id,
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&ec->ed_pubkey);
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if (!n_chan) {
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log_info(LD_CIRC,"Launching n_chan failed. Closing circuit.");
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circuit_mark_for_close(circ, END_CIRC_REASON_CONNECTFAILED);
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return 0;
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}
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log_debug(LD_CIRC,"connecting in progress (or finished). Good.");
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}
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return 0;
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}
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/** Take the 'extend' <b>cell</b>, pull out addr/port plus the onion
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* skin and identity digest for the next hop. If we're already connected,
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* pass the onion skin to the next hop using a create cell; otherwise
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@ -203,32 +244,8 @@ circuit_extend(struct cell_t *cell, struct circuit_t *circ)
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fmt_addrport(&ec.orport_ipv4.addr,ec.orport_ipv4.port),
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msg?msg:"????");
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circ->n_hop = extend_info_new(NULL /*nickname*/,
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(const char*)ec.node_id,
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&ec.ed_pubkey,
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NULL, /*onion_key*/
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NULL, /*curve25519_key*/
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&ec.orport_ipv4.addr,
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ec.orport_ipv4.port);
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circuit_open_connection_for_extend(&ec, circ, should_launch);
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circ->n_chan_create_cell = tor_memdup(&ec.create_cell,
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sizeof(ec.create_cell));
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circuit_set_state(circ, CIRCUIT_STATE_CHAN_WAIT);
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if (should_launch) {
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/* we should try to open a connection */
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n_chan = channel_connect_for_circuit(&ec.orport_ipv4.addr,
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ec.orport_ipv4.port,
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(const char*)ec.node_id,
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&ec.ed_pubkey);
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if (!n_chan) {
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log_info(LD_CIRC,"Launching n_chan failed. Closing circuit.");
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circuit_mark_for_close(circ, END_CIRC_REASON_CONNECTFAILED);
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return 0;
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}
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log_debug(LD_CIRC,"connecting in progress (or finished). Good.");
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}
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/* return success. The onion/circuit/etc will be taken care of
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* automatically (may already have been) whenever n_chan reaches
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* OR_CONN_STATE_OPEN.
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