1 /* Copyright (c) 2001 Matej Pfajfar.
2 * Copyright (c) 2001-2004, Roger Dingledine.
3 * Copyright (c) 2004-2007, Roger Dingledine, Nick Mathewson. */
4 /* See LICENSE for licensing information */
6 const char circuituse_c_id
[] =
11 * \brief Launch the right sort of circuits and attach streams to them.
16 /********* START VARIABLES **********/
18 extern circuit_t
*global_circuitlist
; /* from circuitlist.c */
20 /********* END VARIABLES ************/
22 static void circuit_expire_old_circuits(time_t now
);
23 static void circuit_increment_failure_count(void);
25 /** Return 1 if <b>circ</b> could be returned by circuit_get_best().
29 circuit_is_acceptable(circuit_t
*circ
, edge_connection_t
*conn
,
30 int must_be_open
, uint8_t purpose
,
31 int need_uptime
, int need_internal
,
34 routerinfo_t
*exitrouter
;
35 cpath_build_state_t
*build_state
;
38 tor_assert(conn
->socks_request
);
40 if (!CIRCUIT_IS_ORIGIN(circ
))
41 return 0; /* this circ doesn't start at us */
42 if (must_be_open
&& (circ
->state
!= CIRCUIT_STATE_OPEN
|| !circ
->n_conn
))
43 return 0; /* ignore non-open circs */
44 if (circ
->marked_for_close
)
47 /* if this circ isn't our purpose, skip. */
48 if (purpose
== CIRCUIT_PURPOSE_C_REND_JOINED
&& !must_be_open
) {
49 if (circ
->purpose
!= CIRCUIT_PURPOSE_C_ESTABLISH_REND
&&
50 circ
->purpose
!= CIRCUIT_PURPOSE_C_REND_READY
&&
51 circ
->purpose
!= CIRCUIT_PURPOSE_C_REND_READY_INTRO_ACKED
&&
52 circ
->purpose
!= CIRCUIT_PURPOSE_C_REND_JOINED
)
54 } else if (purpose
== CIRCUIT_PURPOSE_C_INTRODUCE_ACK_WAIT
&&
56 if (circ
->purpose
!= CIRCUIT_PURPOSE_C_INTRODUCING
&&
57 circ
->purpose
!= CIRCUIT_PURPOSE_C_INTRODUCE_ACK_WAIT
)
60 if (purpose
!= circ
->purpose
)
64 if (purpose
== CIRCUIT_PURPOSE_C_GENERAL
)
65 if (circ
->timestamp_dirty
&&
66 circ
->timestamp_dirty
+get_options()->MaxCircuitDirtiness
<= now
)
69 /* decide if this circ is suitable for this conn */
71 /* for rend circs, circ->cpath->prev is not the last router in the
72 * circuit, it's the magical extra bob hop. so just check the nickname
73 * of the one we meant to finish at.
75 build_state
= TO_ORIGIN_CIRCUIT(circ
)->build_state
;
76 exitrouter
= build_state_get_exit_router(build_state
);
78 if (need_uptime
&& !build_state
->need_uptime
)
80 if (need_internal
!= build_state
->is_internal
)
83 if (purpose
== CIRCUIT_PURPOSE_C_GENERAL
) {
84 if (!exitrouter
&& !build_state
->onehop_tunnel
) {
85 log_debug(LD_CIRC
,"Not considering circuit with unknown router.");
86 return 0; /* this circuit is screwed and doesn't know it yet,
87 * or is a rendezvous circuit. */
89 if (build_state
->onehop_tunnel
) {
90 if (conn
->socks_request
->command
!= SOCKS_COMMAND_CONNECT_DIR
) {
91 log_debug(LD_CIRC
,"Skipping one-hop circuit.");
95 if (conn
->socks_request
->command
== SOCKS_COMMAND_CONNECT_DIR
) {
96 /* don't use three-hop circuits -- that could hurt our anonymity. */
97 log_debug(LD_CIRC
,"Skipping multi-hop circuit for CONNECT_DIR.");
101 if (exitrouter
&& !connection_ap_can_use_exit(conn
, exitrouter
)) {
102 /* can't exit from this router */
105 } else { /* not general */
106 if (rend_cmp_service_ids(conn
->rend_query
,
107 TO_ORIGIN_CIRCUIT(circ
)->rend_query
)) {
108 /* this circ is not for this conn */
115 /** Return 1 if circuit <b>a</b> is better than circuit <b>b</b> for
116 * <b>purpose</b>, and return 0 otherwise. Used by circuit_get_best.
119 circuit_is_better(circuit_t
*a
, circuit_t
*b
, uint8_t purpose
)
122 case CIRCUIT_PURPOSE_C_GENERAL
:
123 /* if it's used but less dirty it's best;
124 * else if it's more recently created it's best
126 if (b
->timestamp_dirty
) {
127 if (a
->timestamp_dirty
&&
128 a
->timestamp_dirty
> b
->timestamp_dirty
)
131 if (a
->timestamp_dirty
||
132 a
->timestamp_created
> b
->timestamp_created
)
134 if (CIRCUIT_IS_ORIGIN(b
) &&
135 TO_ORIGIN_CIRCUIT(b
)->build_state
->is_internal
)
139 case CIRCUIT_PURPOSE_C_INTRODUCE_ACK_WAIT
:
140 /* the closer it is to ack_wait the better it is */
141 if (a
->purpose
> b
->purpose
)
144 case CIRCUIT_PURPOSE_C_REND_JOINED
:
145 /* the closer it is to rend_joined the better it is */
146 if (a
->purpose
> b
->purpose
)
153 /** Find the best circ that conn can use, preferably one which is
154 * dirty. Circ must not be too old.
156 * Conn must be defined.
158 * If must_be_open, ignore circs not in CIRCUIT_STATE_OPEN.
160 * circ_purpose specifies what sort of circuit we must have.
161 * It can be C_GENERAL, C_INTRODUCE_ACK_WAIT, or C_REND_JOINED.
163 * If it's REND_JOINED and must_be_open==0, then return the closest
164 * rendezvous-purposed circuit that you can find.
166 * If it's INTRODUCE_ACK_WAIT and must_be_open==0, then return the
167 * closest introduce-purposed circuit that you can find.
169 static origin_circuit_t
*
170 circuit_get_best(edge_connection_t
*conn
, int must_be_open
, uint8_t purpose
,
171 int need_uptime
, int need_internal
)
173 circuit_t
*circ
, *best
=NULL
;
174 time_t now
= time(NULL
);
178 tor_assert(purpose
== CIRCUIT_PURPOSE_C_GENERAL
||
179 purpose
== CIRCUIT_PURPOSE_C_INTRODUCE_ACK_WAIT
||
180 purpose
== CIRCUIT_PURPOSE_C_REND_JOINED
);
182 for (circ
=global_circuitlist
;circ
;circ
= circ
->next
) {
183 if (!circuit_is_acceptable(circ
,conn
,must_be_open
,purpose
,
184 need_uptime
,need_internal
,now
))
187 /* now this is an acceptable circ to hand back. but that doesn't
188 * mean it's the *best* circ to hand back. try to decide.
190 if (!best
|| circuit_is_better(circ
,best
,purpose
))
194 return best
? TO_ORIGIN_CIRCUIT(best
) : NULL
;
197 /** Close all circuits that start at us, aren't open, and were born
198 * at least CircuitBuildTimeout seconds ago.
201 circuit_expire_building(time_t now
)
203 circuit_t
*victim
, *circ
= global_circuitlist
;
204 time_t cutoff
= now
- get_options()->CircuitBuildTimeout
;
209 if (!CIRCUIT_IS_ORIGIN(victim
) || /* didn't originate here */
210 victim
->timestamp_created
> cutoff
|| /* Not old enough to expire */
211 victim
->marked_for_close
) /* don't mess with marked circs */
215 /* some debug logs, to help track bugs */
216 if (victim
->purpose
>= CIRCUIT_PURPOSE_C_INTRODUCING
&&
217 victim
->purpose
<= CIRCUIT_PURPOSE_C_REND_READY_INTRO_ACKED
) {
218 if (!victim
->timestamp_dirty
)
219 log_fn(LOG_DEBUG
,"Considering %sopen purp %d to %s (circid %d)."
221 victim
->state
== CIRCUIT_STATE_OPEN
? "" : "non",
222 victim
->purpose
, victim
->build_state
->chosen_exit_name
,
225 log_fn(LOG_DEBUG
,"Considering %sopen purp %d to %s (circid %d). "
226 "%d secs since dirty.",
227 victim
->state
== CIRCUIT_STATE_OPEN
? "" : "non",
228 victim
->purpose
, victim
->build_state
->chosen_exit_name
,
230 (int)(now
- victim
->timestamp_dirty
));
234 /* if circ is !open, or if it's open but purpose is a non-finished
235 * intro or rend, then mark it for close */
236 if (victim
->state
== CIRCUIT_STATE_OPEN
) {
237 switch (victim
->purpose
) {
238 default: /* most open circuits can be left alone. */
239 continue; /* yes, continue inside a switch refers to the nearest
240 * enclosing loop. C is smart. */
241 case CIRCUIT_PURPOSE_C_ESTABLISH_REND
:
242 case CIRCUIT_PURPOSE_C_INTRODUCING
:
243 case CIRCUIT_PURPOSE_S_ESTABLISH_INTRO
:
244 break; /* too old, need to die */
245 case CIRCUIT_PURPOSE_C_REND_READY
:
246 /* it's a rend_ready circ -- has it already picked a query? */
247 /* c_rend_ready circs measure age since timestamp_dirty,
248 * because that's set when they switch purposes
250 if (TO_ORIGIN_CIRCUIT(victim
)->rend_query
[0] ||
251 victim
->timestamp_dirty
> cutoff
)
254 case CIRCUIT_PURPOSE_C_REND_READY_INTRO_ACKED
:
255 case CIRCUIT_PURPOSE_C_INTRODUCE_ACK_WAIT
:
256 /* rend and intro circs become dirty each time they
257 * make an introduction attempt. so timestamp_dirty
258 * will reflect the time since the last attempt.
260 if (victim
->timestamp_dirty
> cutoff
)
267 log_info(LD_CIRC
,"Abandoning circ %s:%d:%d (state %d:%s, purpose %d)",
268 victim
->n_conn
->_base
.address
, victim
->n_port
,
270 victim
->state
, circuit_state_to_string(victim
->state
),
273 log_info(LD_CIRC
,"Abandoning circ %d (state %d:%s, purpose %d)",
274 victim
->n_circ_id
, victim
->state
,
275 circuit_state_to_string(victim
->state
), victim
->purpose
);
277 circuit_log_path(LOG_INFO
,LD_CIRC
,TO_ORIGIN_CIRCUIT(victim
));
278 circuit_mark_for_close(victim
, END_CIRC_REASON_TIMEOUT
);
282 /** Remove any elements in <b>needed_ports</b> that are handled by an
283 * open or in-progress circuit.
286 circuit_remove_handled_ports(smartlist_t
*needed_ports
)
291 for (i
= 0; i
< smartlist_len(needed_ports
); ++i
) {
292 port
= smartlist_get(needed_ports
, i
);
294 if (circuit_stream_is_being_handled(NULL
, *port
,
295 MIN_CIRCUITS_HANDLING_STREAM
)) {
296 // log_debug(LD_CIRC,"Port %d is already being handled; removing.", port);
297 smartlist_del(needed_ports
, i
--);
300 log_debug(LD_CIRC
,"Port %d is not handled.", *port
);
305 /** Return 1 if at least <b>min</b> general-purpose non-internal circuits
306 * will have an acceptable exit node for exit stream <b>conn</b> if it
307 * is defined, else for "*:port".
311 circuit_stream_is_being_handled(edge_connection_t
*conn
,
312 uint16_t port
, int min
)
315 routerinfo_t
*exitrouter
;
317 time_t now
= time(NULL
);
318 int need_uptime
= smartlist_string_num_isin(get_options()->LongLivedPorts
,
319 conn
? conn
->socks_request
->port
: port
);
321 for (circ
=global_circuitlist
;circ
;circ
= circ
->next
) {
322 if (CIRCUIT_IS_ORIGIN(circ
) &&
323 !circ
->marked_for_close
&&
324 circ
->purpose
== CIRCUIT_PURPOSE_C_GENERAL
&&
325 (!circ
->timestamp_dirty
||
326 circ
->timestamp_dirty
+ get_options()->MaxCircuitDirtiness
> now
)) {
327 cpath_build_state_t
*build_state
= TO_ORIGIN_CIRCUIT(circ
)->build_state
;
328 if (build_state
->is_internal
|| build_state
->onehop_tunnel
)
331 exitrouter
= build_state_get_exit_router(build_state
);
332 if (exitrouter
&& (!need_uptime
|| build_state
->need_uptime
)) {
335 ok
= connection_ap_can_use_exit(conn
, exitrouter
);
337 addr_policy_result_t r
= compare_addr_to_addr_policy(
338 0, port
, exitrouter
->exit_policy
);
339 ok
= r
!= ADDR_POLICY_REJECTED
&& r
!= ADDR_POLICY_PROBABLY_REJECTED
;
351 /** Don't keep more than this many unused open circuits around. */
352 #define MAX_UNUSED_OPEN_CIRCUITS 12
354 /** Figure out how many circuits we have open that are clean. Make
355 * sure it's enough for all the upcoming behaviors we predict we'll have.
356 * But if we have too many, close the not-so-useful ones.
359 circuit_predict_and_launch_new(void)
362 int num
=0, num_internal
=0, num_uptime_internal
=0;
363 int hidserv_needs_uptime
=0, hidserv_needs_capacity
=1;
364 int port_needs_uptime
=0, port_needs_capacity
=1;
365 time_t now
= time(NULL
);
367 /* First, count how many of each type of circuit we have already. */
368 for (circ
=global_circuitlist
;circ
;circ
= circ
->next
) {
369 cpath_build_state_t
*build_state
;
370 if (!CIRCUIT_IS_ORIGIN(circ
))
372 if (circ
->marked_for_close
)
373 continue; /* don't mess with marked circs */
374 if (circ
->timestamp_dirty
)
375 continue; /* only count clean circs */
376 if (circ
->purpose
!= CIRCUIT_PURPOSE_C_GENERAL
)
377 continue; /* only pay attention to general-purpose circs */
378 build_state
= TO_ORIGIN_CIRCUIT(circ
)->build_state
;
379 if (build_state
->onehop_tunnel
)
382 if (build_state
->is_internal
)
384 if (build_state
->need_uptime
&& build_state
->is_internal
)
385 num_uptime_internal
++;
388 /* If that's enough, then stop now. */
389 if (num
>= MAX_UNUSED_OPEN_CIRCUITS
)
390 return; /* we already have many, making more probably will hurt */
392 /* Second, see if we need any more exit circuits. */
393 /* check if we know of a port that's been requested recently
394 * and no circuit is currently available that can handle it. */
395 if (!circuit_all_predicted_ports_handled(now
, &port_needs_uptime
,
396 &port_needs_capacity
)) {
398 "Have %d clean circs (%d internal), need another exit circ.",
400 circuit_launch_by_router(CIRCUIT_PURPOSE_C_GENERAL
, 0, NULL
,
401 port_needs_uptime
, port_needs_capacity
, 0);
405 /* Third, see if we need any more hidden service (server) circuits. */
406 if (num_rend_services() && num_uptime_internal
< 3) {
408 "Have %d clean circs (%d internal), need another internal "
409 "circ for my hidden service.",
411 circuit_launch_by_router(CIRCUIT_PURPOSE_C_GENERAL
, 0, NULL
,
416 /* Fourth, see if we need any more hidden service (client) circuits. */
417 if (rep_hist_get_predicted_internal(now
, &hidserv_needs_uptime
,
418 &hidserv_needs_capacity
) &&
419 ((num_uptime_internal
<2 && hidserv_needs_uptime
) ||
422 "Have %d clean circs (%d uptime-internal, %d internal), need"
423 " another hidserv circ.",
424 num
, num_uptime_internal
, num_internal
);
425 circuit_launch_by_router(CIRCUIT_PURPOSE_C_GENERAL
, 0, NULL
,
426 hidserv_needs_uptime
, hidserv_needs_capacity
, 1);
431 /** Build a new test circuit every 5 minutes */
432 #define TESTING_CIRCUIT_INTERVAL 300
434 /** This function is called once a second, if router_have_min_dir_info() is
435 * true. Its job is to make sure all services we offer have enough circuits
436 * available. Some services just want enough circuits for current tasks,
437 * whereas others want a minimum set of idle circuits hanging around.
440 circuit_build_needed_circs(time_t now
)
442 static long time_to_new_circuit
= 0;
444 /* launch a new circ for any pending streams that need one */
445 connection_ap_attach_pending();
447 /* make sure any hidden services have enough intro points */
448 rend_services_introduce();
450 if (time_to_new_circuit
< now
) {
451 circuit_reset_failure_count(1);
452 time_to_new_circuit
= now
+ get_options()->NewCircuitPeriod
;
453 if (proxy_mode(get_options()))
454 addressmap_clean(now
);
455 circuit_expire_old_circuits(now
);
457 #if 0 /* disable for now, until predict-and-launch-new can cull leftovers */
458 circ
= circuit_get_youngest_clean_open(CIRCUIT_PURPOSE_C_GENERAL
);
459 if (get_options()->RunTesting
&&
461 circ
->timestamp_created
+ TESTING_CIRCUIT_INTERVAL
< now
) {
462 log_fn(LOG_INFO
,"Creating a new testing circuit.");
463 circuit_launch_by_router(CIRCUIT_PURPOSE_C_GENERAL
, 0, NULL
, 0, 0, 0);
467 circuit_predict_and_launch_new();
470 /** If the stream <b>conn</b> is a member of any of the linked
471 * lists of <b>circ</b>, then remove it from the list.
474 circuit_detach_stream(circuit_t
*circ
, edge_connection_t
*conn
)
476 edge_connection_t
*prevconn
;
481 conn
->cpath_layer
= NULL
; /* make sure we don't keep a stale pointer */
482 conn
->on_circuit
= NULL
;
484 if (CIRCUIT_IS_ORIGIN(circ
)) {
485 origin_circuit_t
*origin_circ
= TO_ORIGIN_CIRCUIT(circ
);
486 if (conn
== origin_circ
->p_streams
) {
487 origin_circ
->p_streams
= conn
->next_stream
;
491 for (prevconn
= origin_circ
->p_streams
;
492 prevconn
&& prevconn
->next_stream
&& prevconn
->next_stream
!= conn
;
493 prevconn
= prevconn
->next_stream
)
495 if (prevconn
&& prevconn
->next_stream
) {
496 prevconn
->next_stream
= conn
->next_stream
;
500 or_circuit_t
*or_circ
= TO_OR_CIRCUIT(circ
);
501 if (conn
== or_circ
->n_streams
) {
502 or_circ
->n_streams
= conn
->next_stream
;
505 if (conn
== or_circ
->resolving_streams
) {
506 or_circ
->resolving_streams
= conn
->next_stream
;
510 for (prevconn
= or_circ
->n_streams
;
511 prevconn
&& prevconn
->next_stream
&& prevconn
->next_stream
!= conn
;
512 prevconn
= prevconn
->next_stream
)
514 if (prevconn
&& prevconn
->next_stream
) {
515 prevconn
->next_stream
= conn
->next_stream
;
519 for (prevconn
= or_circ
->resolving_streams
;
520 prevconn
&& prevconn
->next_stream
&& prevconn
->next_stream
!= conn
;
521 prevconn
= prevconn
->next_stream
)
523 if (prevconn
&& prevconn
->next_stream
) {
524 prevconn
->next_stream
= conn
->next_stream
;
529 log_err(LD_BUG
,"edge conn not in circuit's list?");
530 tor_assert(0); /* should never get here */
533 /** Find each circuit that has been unused for too long, or dirty
534 * for too long and has no streams on it: mark it for close.
537 circuit_expire_old_circuits(time_t now
)
540 time_t cutoff
= now
- get_options()->CircuitIdleTimeout
;
542 for (circ
= global_circuitlist
; circ
; circ
= circ
->next
) {
543 if (circ
->marked_for_close
|| ! CIRCUIT_IS_ORIGIN(circ
))
545 /* If the circuit has been dirty for too long, and there are no streams
546 * on it, mark it for close.
548 if (circ
->timestamp_dirty
&&
549 circ
->timestamp_dirty
+ get_options()->MaxCircuitDirtiness
< now
&&
550 !TO_ORIGIN_CIRCUIT(circ
)->p_streams
/* nothing attached */ ) {
551 log_debug(LD_CIRC
, "Closing n_circ_id %d (dirty %d secs ago, purp %d)",
552 circ
->n_circ_id
, (int)(now
- circ
->timestamp_dirty
),
554 circuit_mark_for_close(circ
, END_CIRC_REASON_FINISHED
);
555 } else if (!circ
->timestamp_dirty
&&
556 circ
->state
== CIRCUIT_STATE_OPEN
&&
557 circ
->purpose
== CIRCUIT_PURPOSE_C_GENERAL
) {
558 if (circ
->timestamp_created
< cutoff
) {
560 "Closing circuit that has been unused for %d seconds.",
561 (int)(now
- circ
->timestamp_created
));
562 circuit_mark_for_close(circ
, END_CIRC_REASON_FINISHED
);
568 /** Number of testing circuits we want open before testing our bandwidth. */
569 #define NUM_PARALLEL_TESTING_CIRCS 4
571 /** True iff we've ever had enough testing circuits open to test our
573 static int have_performed_bandwidth_test
= 0;
575 /** Reset have_performed_bandwidth_test, so we'll start building
576 * testing circuits again so we can exercise our bandwidth. */
578 reset_bandwidth_test(void)
580 have_performed_bandwidth_test
= 0;
583 /** Return 1 if we've already exercised our bandwidth, or if we
584 * have fewer than NUM_PARALLEL_TESTING_CIRCS testing circuits
585 * established or on the way. Else return 0.
588 circuit_enough_testing_circs(void)
593 if (have_performed_bandwidth_test
)
596 for (circ
= global_circuitlist
; circ
; circ
= circ
->next
) {
597 if (!circ
->marked_for_close
&& CIRCUIT_IS_ORIGIN(circ
) &&
598 circ
->purpose
== CIRCUIT_PURPOSE_TESTING
&&
599 circ
->state
== CIRCUIT_STATE_OPEN
)
602 return num
>= NUM_PARALLEL_TESTING_CIRCS
;
605 /** A testing circuit has completed. Take whatever stats we want.
606 * Noticing reachability is taken care of in onionskin_answer(),
607 * so there's no need to record anything here. But if we still want
608 * to do the bandwidth test, and we now have enough testing circuits
612 circuit_testing_opened(origin_circuit_t
*circ
)
614 if (have_performed_bandwidth_test
) {
615 circuit_mark_for_close(TO_CIRCUIT(circ
), END_CIRC_AT_ORIGIN
);
616 } else if (circuit_enough_testing_circs()) {
617 router_perform_bandwidth_test(NUM_PARALLEL_TESTING_CIRCS
, time(NULL
));
618 have_performed_bandwidth_test
= 1;
620 consider_testing_reachability(1, 0);
623 /** A testing circuit has failed to build. Take whatever stats we want. */
625 circuit_testing_failed(origin_circuit_t
*circ
, int at_last_hop
)
627 routerinfo_t
*me
= router_get_my_routerinfo();
628 if (server_mode(get_options()) && check_whether_orport_reachable())
634 "Our testing circuit (to see if your ORPort is reachable) "
635 "has failed. I'll try again later.");
636 control_event_server_status(LOG_WARN
, "REACHABILITY_FAILED ORADDRESS=%s:%d",
637 me
->address
, me
->or_port
);
639 /* These aren't used yet. */
644 /** The circuit <b>circ</b> has just become open. Take the next
645 * step: for rendezvous circuits, we pass circ to the appropriate
646 * function in rendclient or rendservice. For general circuits, we
647 * call connection_ap_attach_pending, which looks for pending streams
648 * that could use circ.
651 circuit_has_opened(origin_circuit_t
*circ
)
653 control_event_circuit_status(circ
, CIRC_EVENT_BUILT
, 0);
655 switch (TO_CIRCUIT(circ
)->purpose
) {
656 case CIRCUIT_PURPOSE_C_ESTABLISH_REND
:
657 rend_client_rendcirc_has_opened(circ
);
658 connection_ap_attach_pending();
660 case CIRCUIT_PURPOSE_C_INTRODUCING
:
661 rend_client_introcirc_has_opened(circ
);
663 case CIRCUIT_PURPOSE_C_GENERAL
:
664 /* Tell any AP connections that have been waiting for a new
665 * circuit that one is ready. */
666 connection_ap_attach_pending();
668 case CIRCUIT_PURPOSE_S_ESTABLISH_INTRO
:
669 /* at Bob, waiting for introductions */
670 rend_service_intro_has_opened(circ
);
672 case CIRCUIT_PURPOSE_S_CONNECT_REND
:
673 /* at Bob, connecting to rend point */
674 rend_service_rendezvous_has_opened(circ
);
676 case CIRCUIT_PURPOSE_TESTING
:
677 circuit_testing_opened(circ
);
680 * This won't happen in normal operation, but might happen if the
681 * controller did it. Just let it slide. */
685 /** Called whenever a circuit could not be successfully built.
688 circuit_build_failed(origin_circuit_t
*circ
)
690 /* we should examine circ and see if it failed because of
691 * the last hop or an earlier hop. then use this info below.
693 int failed_at_last_hop
= 0;
694 /* If the last hop isn't open, and the second-to-last is, we failed
695 * at the last hop. */
697 circ
->cpath
->prev
->state
!= CPATH_STATE_OPEN
&&
698 circ
->cpath
->prev
->prev
->state
== CPATH_STATE_OPEN
) {
699 failed_at_last_hop
= 1;
702 circ
->cpath
->state
!= CPATH_STATE_OPEN
) {
703 /* We failed at the first hop. If there's an OR connection
704 to blame, blame it. */
705 or_connection_t
*n_conn
= NULL
;
706 if (circ
->_base
.n_conn
) {
707 n_conn
= circ
->_base
.n_conn
;
708 } else if (circ
->_base
.state
== CIRCUIT_STATE_OR_WAIT
) {
709 /* we have to hunt for it */
710 n_conn
= connection_or_get_by_identity_digest(
711 circ
->_base
.n_conn_id_digest
);
715 "Our circuit failed to get a response from the first hop "
716 "(%s:%d). I'm going to try to rotate to a better connection.",
717 n_conn
->_base
.address
, n_conn
->_base
.port
);
718 n_conn
->_base
.or_is_obsolete
= 1;
719 entry_guard_register_connect_status(n_conn
->identity_digest
, 0,
724 switch (circ
->_base
.purpose
) {
725 case CIRCUIT_PURPOSE_C_GENERAL
:
726 /* If we never built the circuit, note it as a failure. */
727 circuit_increment_failure_count();
728 if (failed_at_last_hop
) {
729 /* Make sure any streams that demand our last hop as their exit
730 * know that it's unlikely to happen. */
731 circuit_discard_optional_exit_enclaves(circ
->cpath
->prev
->extend_info
);
734 case CIRCUIT_PURPOSE_TESTING
:
735 circuit_testing_failed(circ
, failed_at_last_hop
);
737 case CIRCUIT_PURPOSE_S_ESTABLISH_INTRO
:
738 /* at Bob, waiting for introductions */
739 if (circ
->_base
.state
!= CIRCUIT_STATE_OPEN
) {
740 circuit_increment_failure_count();
742 /* no need to care here, because bob will rebuild intro
743 * points periodically. */
745 case CIRCUIT_PURPOSE_C_INTRODUCING
:
746 /* at Alice, connecting to intro point */
747 /* Don't increment failure count, since Bob may have picked
748 * the introduction point maliciously */
749 /* Alice will pick a new intro point when this one dies, if
750 * the stream in question still cares. No need to act here. */
752 case CIRCUIT_PURPOSE_C_ESTABLISH_REND
:
753 /* at Alice, waiting for Bob */
754 circuit_increment_failure_count();
755 /* Alice will pick a new rend point when this one dies, if
756 * the stream in question still cares. No need to act here. */
758 case CIRCUIT_PURPOSE_S_CONNECT_REND
:
759 /* at Bob, connecting to rend point */
760 /* Don't increment failure count, since Alice may have picked
761 * the rendezvous point maliciously */
763 "Couldn't connect to Alice's chosen rend point %s "
765 escaped(build_state_get_exit_nickname(circ
->build_state
)),
766 failed_at_last_hop
?"last":"non-last");
767 rend_service_relaunch_rendezvous(circ
);
770 * This won't happen in normal operation, but might happen if the
771 * controller did it. Just let it slide. */
775 /** Number of consecutive failures so far; should only be touched by
776 * circuit_launch_new and circuit_*_failure_count.
778 static int n_circuit_failures
= 0;
779 /** Before the last time we called circuit_reset_failure_count(), were
780 * there a lot of failures? */
781 static int did_circs_fail_last_period
= 0;
783 /** Don't retry launching a new circuit if we try this many times with no
785 #define MAX_CIRCUIT_FAILURES 5
787 /** Launch a new circuit; see circuit_launch_by_extend_info() for
788 * details on arguments. */
790 circuit_launch_by_router(uint8_t purpose
, int onehop_tunnel
,
791 routerinfo_t
*exit
, int need_uptime
,
792 int need_capacity
, int internal
)
794 origin_circuit_t
*circ
;
795 extend_info_t
*info
= NULL
;
797 info
= extend_info_from_router(exit
);
798 circ
= circuit_launch_by_extend_info(
799 purpose
, onehop_tunnel
, info
, need_uptime
, need_capacity
, internal
);
801 extend_info_free(info
);
805 /** Launch a new circuit with purpose <b>purpose</b> and exit node <b>info</b>
806 * (or NULL to select a random exit node). If <b>need_uptime</b> is true,
807 * choose among routers with high uptime. If <b>need_capacity</b> is true,
808 * choose among routers with high bandwidth. If <b>internal</b> is true, the
809 * last hop need not be an exit node. Return the newly allocated circuit on
810 * success, or NULL on failure. */
812 circuit_launch_by_extend_info(uint8_t purpose
, int onehop_tunnel
,
813 extend_info_t
*extend_info
, int need_uptime
,
814 int need_capacity
, int internal
)
816 origin_circuit_t
*circ
;
818 if (!onehop_tunnel
&& !router_have_minimum_dir_info()) {
819 log_debug(LD_CIRC
,"Haven't fetched enough directory info yet; canceling "
824 if ((extend_info
|| purpose
!= CIRCUIT_PURPOSE_C_GENERAL
) &&
825 purpose
!= CIRCUIT_PURPOSE_TESTING
&& !onehop_tunnel
) {
826 /* see if there are appropriate circs available to cannibalize. */
827 circ
= circuit_find_to_cannibalize(CIRCUIT_PURPOSE_C_GENERAL
, extend_info
,
828 need_uptime
, need_capacity
, internal
);
830 log_info(LD_CIRC
,"Cannibalizing circ '%s' for purpose %d",
831 build_state_get_exit_nickname(circ
->build_state
), purpose
);
832 circ
->_base
.purpose
= purpose
;
833 /* reset the birth date of this circ, else expire_building
834 * will see it and think it's been trying to build since it
836 circ
->_base
.timestamp_created
= time(NULL
);
838 case CIRCUIT_PURPOSE_C_ESTABLISH_REND
:
839 case CIRCUIT_PURPOSE_S_ESTABLISH_INTRO
:
840 /* it's ready right now */
842 case CIRCUIT_PURPOSE_C_INTRODUCING
:
843 case CIRCUIT_PURPOSE_S_CONNECT_REND
:
844 case CIRCUIT_PURPOSE_C_GENERAL
:
845 /* need to add a new hop */
846 tor_assert(extend_info
);
847 if (circuit_extend_to_new_exit(circ
, extend_info
) < 0)
852 "Bug: unexpected purpose %d when cannibalizing a circ.",
854 tor_fragile_assert();
861 if (did_circs_fail_last_period
&&
862 n_circuit_failures
> MAX_CIRCUIT_FAILURES
) {
863 /* too many failed circs in a row. don't try. */
864 // log_fn(LOG_INFO,"%d failures so far, not trying.",n_circuit_failures);
868 /* try a circ. if it fails, circuit_mark_for_close will increment
869 * n_circuit_failures */
870 return circuit_establish_circuit(purpose
, onehop_tunnel
, extend_info
,
871 need_uptime
, need_capacity
, internal
);
874 /** Launch a new circuit; see circuit_launch_by_extend_info() for
875 * details on arguments. */
877 circuit_launch_by_nickname(uint8_t purpose
, int onehop_tunnel
,
878 const char *exit_nickname
,
879 int need_uptime
, int need_capacity
, int internal
)
881 routerinfo_t
*router
= NULL
;
884 router
= router_get_by_nickname(exit_nickname
, 1);
886 log_warn(LD_GENERAL
, "Trying to launch circ by nickname, but "
887 "no such OR as '%s'", exit_nickname
);
891 return circuit_launch_by_router(purpose
, onehop_tunnel
, router
,
892 need_uptime
, need_capacity
, internal
);
895 /** Record another failure at opening a general circuit. When we have
896 * too many, we'll stop trying for the remainder of this minute.
899 circuit_increment_failure_count(void)
901 ++n_circuit_failures
;
902 log_debug(LD_CIRC
,"n_circuit_failures now %d.",n_circuit_failures
);
905 /** Reset the failure count for opening general circuits. This means
906 * we will try MAX_CIRCUIT_FAILURES times more (if necessary) before
910 circuit_reset_failure_count(int timeout
)
912 if (timeout
&& n_circuit_failures
> MAX_CIRCUIT_FAILURES
)
913 did_circs_fail_last_period
= 1;
915 did_circs_fail_last_period
= 0;
916 n_circuit_failures
= 0;
919 /** Find an open circ that we're happy to use for <b>conn</b> and return 1. If
920 * there isn't one, and there isn't one on the way, launch one and return
921 * 0. If it will never work, return -1.
923 * Write the found or in-progress or launched circ into *circp.
926 circuit_get_open_circ_or_launch(edge_connection_t
*conn
,
927 uint8_t desired_circuit_purpose
,
928 origin_circuit_t
**circp
)
930 origin_circuit_t
*circ
;
931 int check_exit_policy
;
932 int need_uptime
, need_internal
;
937 tor_assert(conn
->_base
.state
== AP_CONN_STATE_CIRCUIT_WAIT
);
939 (conn
->socks_request
->command
== SOCKS_COMMAND_CONNECT
) &&
940 !connection_edge_is_rendezvous_stream(conn
);
941 want_onehop
= conn
->socks_request
->command
== SOCKS_COMMAND_CONNECT_DIR
;
943 need_uptime
= (conn
->socks_request
->command
== SOCKS_COMMAND_CONNECT
) &&
944 smartlist_string_num_isin(get_options()->LongLivedPorts
,
945 conn
->socks_request
->port
);
946 need_internal
= desired_circuit_purpose
!= CIRCUIT_PURPOSE_C_GENERAL
;
948 circ
= circuit_get_best(conn
, 1, desired_circuit_purpose
,
949 need_uptime
, need_internal
);
953 return 1; /* we're happy */
956 if (!want_onehop
&& !router_have_minimum_dir_info()) {
957 if (!connection_get_by_type(CONN_TYPE_DIR
)) {
958 log_notice(LD_APP
|LD_DIR
,
959 "Application request when we're believed to be "
960 "offline. Optimistically trying directory fetches again.");
961 router_reset_status_download_failures();
962 router_reset_descriptor_download_failures();
963 update_networkstatus_downloads(time(NULL
));
964 update_router_descriptor_downloads(time(NULL
));
966 /* the stream will be dealt with when router_have_minimum_dir_info becomes
967 * 1, or when all directory attempts fail and directory_all_unreachable()
973 /* Do we need to check exit policy? */
974 if (check_exit_policy
) {
977 if (tor_inet_aton(conn
->socks_request
->address
, &in
))
978 addr
= ntohl(in
.s_addr
);
979 if (router_exit_policy_all_routers_reject(addr
, conn
->socks_request
->port
,
982 "No Tor server exists that allows exit to %s:%d. Rejecting.",
983 safe_str(conn
->socks_request
->address
),
984 conn
->socks_request
->port
);
989 /* is one already on the way? */
990 circ
= circuit_get_best(conn
, 0, desired_circuit_purpose
,
991 need_uptime
, need_internal
);
993 extend_info_t
*extend_info
=NULL
;
994 uint8_t new_circ_purpose
;
996 if (desired_circuit_purpose
== CIRCUIT_PURPOSE_C_INTRODUCE_ACK_WAIT
) {
997 /* need to pick an intro point */
998 extend_info
= rend_client_get_random_intro(conn
->rend_query
);
1001 "No intro points for '%s': refetching service descriptor.",
1002 safe_str(conn
->rend_query
));
1003 rend_client_refetch_renddesc(conn
->rend_query
);
1004 conn
->_base
.state
= AP_CONN_STATE_RENDDESC_WAIT
;
1007 log_info(LD_REND
,"Chose '%s' as intro point for '%s'.",
1008 extend_info
->nickname
, safe_str(conn
->rend_query
));
1011 /* If we have specified a particular exit node for our
1012 * connection, then be sure to open a circuit to that exit node.
1014 if (desired_circuit_purpose
== CIRCUIT_PURPOSE_C_GENERAL
) {
1015 if (conn
->chosen_exit_name
) {
1017 int opt
= conn
->_base
.chosen_exit_optional
;
1018 r
= router_get_by_nickname(conn
->chosen_exit_name
, 1);
1020 extend_info
= extend_info_from_router(r
);
1022 log_debug(LD_DIR
, "considering %d, %s",
1023 want_onehop
, conn
->chosen_exit_name
);
1024 if (want_onehop
&& conn
->chosen_exit_name
[0] == '$') {
1025 /* We're asking for a one-hop circuit to a router that
1026 * we don't have a routerinfo about. Hope we have a
1027 * routerstatus or equivalent. */
1029 routerstatus_get_by_hexdigest(conn
->chosen_exit_name
+1);
1031 extend_info
= extend_info_from_routerstatus(s
);
1034 "Requested router '%s' is not known. Closing.",
1035 conn
->chosen_exit_name
);
1039 /* We will need an onion key for the router, and we
1040 * don't have one. Refuse or relax requirements. */
1041 log_fn(opt
? LOG_INFO
: LOG_WARN
, LD_APP
,
1042 "Requested exit point '%s' is not known. %s.",
1043 conn
->chosen_exit_name
, opt
? "Trying others" : "Closing");
1045 conn
->_base
.chosen_exit_optional
= 0;
1046 tor_free(conn
->chosen_exit_name
);
1055 if (desired_circuit_purpose
== CIRCUIT_PURPOSE_C_REND_JOINED
)
1056 new_circ_purpose
= CIRCUIT_PURPOSE_C_ESTABLISH_REND
;
1057 else if (desired_circuit_purpose
== CIRCUIT_PURPOSE_C_INTRODUCE_ACK_WAIT
)
1058 new_circ_purpose
= CIRCUIT_PURPOSE_C_INTRODUCING
;
1060 new_circ_purpose
= desired_circuit_purpose
;
1062 circ
= circuit_launch_by_extend_info(
1063 new_circ_purpose
, want_onehop
, extend_info
,
1064 need_uptime
, 1, need_internal
);
1066 extend_info_free(extend_info
);
1068 if (desired_circuit_purpose
!= CIRCUIT_PURPOSE_C_GENERAL
) {
1069 /* help predict this next time */
1070 rep_hist_note_used_internal(time(NULL
), need_uptime
, 1);
1072 /* write the service_id into circ */
1073 strlcpy(circ
->rend_query
, conn
->rend_query
, sizeof(circ
->rend_query
));
1074 if (circ
->_base
.purpose
== CIRCUIT_PURPOSE_C_ESTABLISH_REND
&&
1075 circ
->_base
.state
== CIRCUIT_STATE_OPEN
)
1076 rend_client_rendcirc_has_opened(circ
);
1082 "No safe circuit (purpose %d) ready for edge "
1083 "connection; delaying.",
1084 desired_circuit_purpose
);
1089 /** Attach the AP stream <b>apconn</b> to circ's linked list of
1090 * p_streams. Also set apconn's cpath_layer to the last hop in
1094 link_apconn_to_circ(edge_connection_t
*apconn
, origin_circuit_t
*circ
)
1096 /* add it into the linked list of streams on this circuit */
1097 log_debug(LD_APP
|LD_CIRC
, "attaching new conn to circ. n_circ_id %d.",
1098 circ
->_base
.n_circ_id
);
1099 /* reset it, so we can measure circ timeouts */
1100 apconn
->_base
.timestamp_lastread
= time(NULL
);
1101 apconn
->next_stream
= circ
->p_streams
;
1102 apconn
->on_circuit
= TO_CIRCUIT(circ
);
1103 /* assert_connection_ok(conn, time(NULL)); */
1104 circ
->p_streams
= apconn
;
1106 tor_assert(circ
->cpath
);
1107 tor_assert(circ
->cpath
->prev
);
1108 tor_assert(circ
->cpath
->prev
->state
== CPATH_STATE_OPEN
);
1109 apconn
->cpath_layer
= circ
->cpath
->prev
;
1112 /** If an exit wasn't specifically chosen, save the history for future
1115 consider_recording_trackhost(edge_connection_t
*conn
, origin_circuit_t
*circ
)
1117 int found_needle
= 0;
1118 or_options_t
*options
= get_options();
1121 char fp
[HEX_DIGEST_LEN
+1];
1123 /* Search the addressmap for this conn's destination. */
1124 /* If he's not in the address map.. */
1125 if (!options
->TrackHostExits
||
1126 addressmap_have_mapping(conn
->socks_request
->address
))
1127 return; /* nothing to track, or already mapped */
1129 SMARTLIST_FOREACH(options
->TrackHostExits
, const char *, cp
, {
1130 if (cp
[0] == '.') { /* match end */
1131 if (!strcasecmpend(conn
->socks_request
->address
, cp
) ||
1132 !strcasecmp(conn
->socks_request
->address
, &cp
[1]))
1134 } else if (strcasecmp(cp
, conn
->socks_request
->address
) == 0) {
1139 if (!found_needle
|| !circ
->build_state
->chosen_exit
)
1142 /* write down the fingerprint of the chosen exit, not the nickname,
1143 * because the chosen exit might not be named. */
1144 base16_encode(fp
, sizeof(fp
),
1145 circ
->build_state
->chosen_exit
->identity_digest
, DIGEST_LEN
);
1147 /* Add this exit/hostname pair to the addressmap. */
1148 len
= strlen(conn
->socks_request
->address
) + 1 /* '.' */ +
1149 strlen(fp
) + 1 /* '.' */ +
1150 strlen("exit") + 1 /* '\0' */;
1151 new_address
= tor_malloc(len
);
1153 tor_snprintf(new_address
, len
, "%s.%s.exit",
1154 conn
->socks_request
->address
, fp
);
1156 addressmap_register(conn
->socks_request
->address
, new_address
,
1157 time(NULL
) + options
->TrackHostExitsExpire
);
1160 /** Attempt to attach the connection <b>conn</b> to <b>circ</b>, and
1161 * send a begin or resolve cell as appropriate. Return values are as
1162 * for connection_ap_handshake_attach_circuit. */
1164 connection_ap_handshake_attach_chosen_circuit(edge_connection_t
*conn
,
1165 origin_circuit_t
*circ
)
1168 tor_assert(conn
->_base
.state
== AP_CONN_STATE_CIRCUIT_WAIT
||
1169 conn
->_base
.state
== AP_CONN_STATE_CONTROLLER_WAIT
);
1170 tor_assert(conn
->socks_request
);
1172 tor_assert(circ
->_base
.state
== CIRCUIT_STATE_OPEN
);
1174 conn
->_base
.state
= AP_CONN_STATE_CIRCUIT_WAIT
;
1176 if (!circ
->_base
.timestamp_dirty
)
1177 circ
->_base
.timestamp_dirty
= time(NULL
);
1179 link_apconn_to_circ(conn
, circ
);
1180 tor_assert(conn
->socks_request
);
1181 switch (conn
->socks_request
->command
) {
1182 case SOCKS_COMMAND_CONNECT
:
1183 consider_recording_trackhost(conn
, circ
);
1185 case SOCKS_COMMAND_CONNECT_DIR
:
1186 if (connection_ap_handshake_send_begin(conn
, circ
)<0)
1190 if (connection_ap_handshake_send_resolve(conn
, circ
)<0)
1197 /** Try to find a safe live circuit for CONN_TYPE_AP connection conn. If
1198 * we don't find one: if conn cannot be handled by any known nodes,
1199 * warn and return -1 (conn needs to die);
1200 * else launch new circuit (if necessary) and return 0.
1201 * Otherwise, associate conn with a safe live circuit, do the
1202 * right next step, and return 1.
1205 connection_ap_handshake_attach_circuit(edge_connection_t
*conn
)
1212 tor_assert(conn
->_base
.state
== AP_CONN_STATE_CIRCUIT_WAIT
);
1213 tor_assert(conn
->socks_request
);
1214 want_onehop
= conn
->socks_request
->command
== SOCKS_COMMAND_CONNECT_DIR
;
1216 conn_age
= time(NULL
) - conn
->_base
.timestamp_created
;
1218 if (!connection_edge_is_rendezvous_stream(conn
)) { /* we're a general conn */
1219 origin_circuit_t
*circ
=NULL
;
1221 if (conn
->chosen_exit_name
) {
1222 routerinfo_t
*router
= router_get_by_nickname(conn
->chosen_exit_name
, 1);
1223 int opt
= conn
->_base
.chosen_exit_optional
;
1224 if (!router
&& !want_onehop
) {
1225 log_fn(opt
? LOG_INFO
: LOG_WARN
, LD_APP
,
1226 "Requested exit point '%s' is not known. %s.",
1227 conn
->chosen_exit_name
, opt
? "Trying others" : "Closing");
1229 conn
->_base
.chosen_exit_optional
= 0;
1230 tor_free(conn
->chosen_exit_name
);
1235 if (router
&& !connection_ap_can_use_exit(conn
, router
)) {
1236 log_fn(opt
? LOG_INFO
: LOG_WARN
, LD_APP
,
1237 "Requested exit point '%s' would refuse request. %s.",
1238 conn
->chosen_exit_name
, opt
? "Trying others" : "Closing");
1240 conn
->_base
.chosen_exit_optional
= 0;
1241 tor_free(conn
->chosen_exit_name
);
1248 /* find the circuit that we should use, if there is one. */
1249 retval
= circuit_get_open_circ_or_launch(
1250 conn
, CIRCUIT_PURPOSE_C_GENERAL
, &circ
);
1254 log_debug(LD_APP
|LD_CIRC
,
1255 "Attaching apconn to circ %d (stream %d sec old).",
1256 circ
->_base
.n_circ_id
, conn_age
);
1257 /* here, print the circ's path. so people can figure out which circs are
1259 circuit_log_path(LOG_INFO
,LD_APP
|LD_CIRC
,circ
);
1261 /* We have found a suitable circuit for our conn. Hurray. */
1262 return connection_ap_handshake_attach_chosen_circuit(conn
, circ
);
1264 } else { /* we're a rendezvous conn */
1265 origin_circuit_t
*rendcirc
=NULL
, *introcirc
=NULL
;
1267 tor_assert(!conn
->cpath_layer
);
1269 /* start by finding a rendezvous circuit for us */
1271 retval
= circuit_get_open_circ_or_launch(
1272 conn
, CIRCUIT_PURPOSE_C_REND_JOINED
, &rendcirc
);
1273 if (retval
< 0) return -1; /* failed */
1276 tor_assert(rendcirc
);
1277 /* one is already established, attach */
1279 "rend joined circ %d already here. attaching. "
1280 "(stream %d sec old)",
1281 rendcirc
->_base
.n_circ_id
, conn_age
);
1282 /* Mark rendezvous circuits as 'newly dirty' every time you use
1283 * them, since the process of rebuilding a rendezvous circ is so
1284 * expensive. There is a tradeoffs between linkability and
1285 * feasibility, at this point.
1287 rendcirc
->_base
.timestamp_dirty
= time(NULL
);
1288 link_apconn_to_circ(conn
, rendcirc
);
1289 if (connection_ap_handshake_send_begin(conn
, rendcirc
) < 0)
1290 return 0; /* already marked, let them fade away */
1294 if (rendcirc
&& (rendcirc
->_base
.purpose
==
1295 CIRCUIT_PURPOSE_C_REND_READY_INTRO_ACKED
)) {
1297 "pending-join circ %d already here, with intro ack. "
1298 "Stalling. (stream %d sec old)",
1299 rendcirc
->_base
.n_circ_id
, conn_age
);
1303 /* it's on its way. find an intro circ. */
1304 retval
= circuit_get_open_circ_or_launch(
1305 conn
, CIRCUIT_PURPOSE_C_INTRODUCE_ACK_WAIT
, &introcirc
);
1306 if (retval
< 0) return -1; /* failed */
1309 /* one has already sent the intro. keep waiting. */
1310 tor_assert(introcirc
);
1311 log_info(LD_REND
, "Intro circ %d present and awaiting ack (rend %d). "
1312 "Stalling. (stream %d sec old)",
1313 introcirc
->_base
.n_circ_id
,
1314 rendcirc
? rendcirc
->_base
.n_circ_id
: 0,
1319 /* now rendcirc and introcirc are each either undefined or not finished */
1321 if (rendcirc
&& introcirc
&&
1322 rendcirc
->_base
.purpose
== CIRCUIT_PURPOSE_C_REND_READY
) {
1324 "ready rend circ %d already here (no intro-ack yet on "
1325 "intro %d). (stream %d sec old)",
1326 rendcirc
->_base
.n_circ_id
,
1327 introcirc
->_base
.n_circ_id
, conn_age
);
1329 tor_assert(introcirc
->_base
.purpose
== CIRCUIT_PURPOSE_C_INTRODUCING
);
1330 if (introcirc
->_base
.state
== CIRCUIT_STATE_OPEN
) {
1331 log_info(LD_REND
,"found open intro circ %d (rend %d); sending "
1332 "introduction. (stream %d sec old)",
1333 introcirc
->_base
.n_circ_id
, rendcirc
->_base
.n_circ_id
,
1335 if (rend_client_send_introduction(introcirc
, rendcirc
) < 0) {
1338 rendcirc
->_base
.timestamp_dirty
= time(NULL
);
1339 introcirc
->_base
.timestamp_dirty
= time(NULL
);
1340 assert_circuit_ok(TO_CIRCUIT(rendcirc
));
1341 assert_circuit_ok(TO_CIRCUIT(introcirc
));
1346 log_info(LD_REND
, "Intro (%d) and rend (%d) circs are not both ready. "
1347 "Stalling conn. (%d sec old)",
1348 introcirc
? introcirc
->_base
.n_circ_id
: 0,
1349 rendcirc
? rendcirc
->_base
.n_circ_id
: 0, conn_age
);