1 /* Copyright (c) 2001 Matej Pfajfar.
2 * Copyright (c) 2001-2004, Roger Dingledine.
3 * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
4 * Copyright (c) 2007-2010, The Tor Project, Inc. */
5 /* See LICENSE for licensing information */
9 * \brief General high-level functions to handle reading and writing
15 #include "circuitbuild.h"
18 #include "rendclient.h"
19 #include "rendcommon.h"
22 static connection_t
*connection_create_listener(
23 struct sockaddr
*listensockaddr
,
24 socklen_t listensocklen
, int type
,
26 static void connection_init(time_t now
, connection_t
*conn
, int type
,
28 static int connection_init_accepted_conn(connection_t
*conn
,
29 uint8_t listener_type
);
30 static int connection_handle_listener_read(connection_t
*conn
, int new_type
);
31 static int connection_bucket_should_increase(int bucket
,
32 or_connection_t
*conn
);
33 static int connection_finished_flushing(connection_t
*conn
);
34 static int connection_flushed_some(connection_t
*conn
);
35 static int connection_finished_connecting(connection_t
*conn
);
36 static int connection_reached_eof(connection_t
*conn
);
37 static int connection_read_to_buf(connection_t
*conn
, int *max_to_read
,
39 static int connection_process_inbuf(connection_t
*conn
, int package_partial
);
40 static void client_check_address_changed(int sock
);
41 static void set_constrained_socket_buffers(int sock
, int size
);
43 static const char *connection_proxy_state_to_string(int state
);
44 static int connection_read_https_proxy_response(connection_t
*conn
);
45 static void connection_send_socks5_connect(connection_t
*conn
);
47 /** The last IPv4 address that our network interface seemed to have been
48 * binding to, in host order. We use this to detect when our IP changes. */
49 static uint32_t last_interface_ip
= 0;
50 /** A list of uint32_ts for addresses we've used in outgoing connections.
51 * Used to detect IP address changes. */
52 static smartlist_t
*outgoing_addrs
= NULL
;
54 /**************************************************************/
57 * Return the human-readable name for the connection type <b>type</b>
60 conn_type_to_string(int type
)
64 case CONN_TYPE_OR_LISTENER
: return "OR listener";
65 case CONN_TYPE_OR
: return "OR";
66 case CONN_TYPE_EXIT
: return "Exit";
67 case CONN_TYPE_AP_LISTENER
: return "Socks listener";
68 case CONN_TYPE_AP_TRANS_LISTENER
:
69 return "Transparent pf/netfilter listener";
70 case CONN_TYPE_AP_NATD_LISTENER
: return "Transparent natd listener";
71 case CONN_TYPE_AP_DNS_LISTENER
: return "DNS listener";
72 case CONN_TYPE_AP
: return "Socks";
73 case CONN_TYPE_DIR_LISTENER
: return "Directory listener";
74 case CONN_TYPE_DIR
: return "Directory";
75 case CONN_TYPE_CPUWORKER
: return "CPU worker";
76 case CONN_TYPE_CONTROL_LISTENER
: return "Control listener";
77 case CONN_TYPE_CONTROL
: return "Control";
79 log_warn(LD_BUG
, "unknown connection type %d", type
);
80 tor_snprintf(buf
, sizeof(buf
), "unknown [%d]", type
);
86 * Return the human-readable name for the connection state <b>state</b>
87 * for the connection type <b>type</b>
90 conn_state_to_string(int type
, int state
)
94 case CONN_TYPE_OR_LISTENER
:
95 case CONN_TYPE_AP_LISTENER
:
96 case CONN_TYPE_AP_TRANS_LISTENER
:
97 case CONN_TYPE_AP_NATD_LISTENER
:
98 case CONN_TYPE_AP_DNS_LISTENER
:
99 case CONN_TYPE_DIR_LISTENER
:
100 case CONN_TYPE_CONTROL_LISTENER
:
101 if (state
== LISTENER_STATE_READY
)
106 case OR_CONN_STATE_CONNECTING
: return "connect()ing";
107 case OR_CONN_STATE_PROXY_HANDSHAKING
: return "handshaking (proxy)";
108 case OR_CONN_STATE_TLS_HANDSHAKING
: return "handshaking (TLS)";
109 case OR_CONN_STATE_TLS_CLIENT_RENEGOTIATING
:
110 return "renegotiating (TLS)";
111 case OR_CONN_STATE_TLS_SERVER_RENEGOTIATING
:
112 return "waiting for renegotiation (TLS)";
113 case OR_CONN_STATE_OR_HANDSHAKING
: return "handshaking (Tor)";
114 case OR_CONN_STATE_OPEN
: return "open";
119 case EXIT_CONN_STATE_RESOLVING
: return "waiting for dest info";
120 case EXIT_CONN_STATE_CONNECTING
: return "connecting";
121 case EXIT_CONN_STATE_OPEN
: return "open";
122 case EXIT_CONN_STATE_RESOLVEFAILED
: return "resolve failed";
127 case AP_CONN_STATE_SOCKS_WAIT
: return "waiting for socks info";
128 case AP_CONN_STATE_NATD_WAIT
: return "waiting for natd dest info";
129 case AP_CONN_STATE_RENDDESC_WAIT
: return "waiting for rendezvous desc";
130 case AP_CONN_STATE_CONTROLLER_WAIT
: return "waiting for controller";
131 case AP_CONN_STATE_CIRCUIT_WAIT
: return "waiting for circuit";
132 case AP_CONN_STATE_CONNECT_WAIT
: return "waiting for connect response";
133 case AP_CONN_STATE_RESOLVE_WAIT
: return "waiting for resolve response";
134 case AP_CONN_STATE_OPEN
: return "open";
139 case DIR_CONN_STATE_CONNECTING
: return "connecting";
140 case DIR_CONN_STATE_CLIENT_SENDING
: return "client sending";
141 case DIR_CONN_STATE_CLIENT_READING
: return "client reading";
142 case DIR_CONN_STATE_CLIENT_FINISHED
: return "client finished";
143 case DIR_CONN_STATE_SERVER_COMMAND_WAIT
: return "waiting for command";
144 case DIR_CONN_STATE_SERVER_WRITING
: return "writing";
147 case CONN_TYPE_CPUWORKER
:
149 case CPUWORKER_STATE_IDLE
: return "idle";
150 case CPUWORKER_STATE_BUSY_ONION
: return "busy with onion";
153 case CONN_TYPE_CONTROL
:
155 case CONTROL_CONN_STATE_OPEN
: return "open (protocol v1)";
156 case CONTROL_CONN_STATE_NEEDAUTH
:
157 return "waiting for authentication (protocol v1)";
162 log_warn(LD_BUG
, "unknown connection state %d (type %d)", state
, type
);
163 tor_snprintf(buf
, sizeof(buf
),
164 "unknown state [%d] on unknown [%s] connection",
165 state
, conn_type_to_string(type
));
169 /** Allocate and return a new dir_connection_t, initialized as by
170 * connection_init(). */
172 dir_connection_new(int socket_family
)
174 dir_connection_t
*dir_conn
= tor_malloc_zero(sizeof(dir_connection_t
));
175 connection_init(time(NULL
), TO_CONN(dir_conn
), CONN_TYPE_DIR
, socket_family
);
179 /** Allocate and return a new or_connection_t, initialized as by
180 * connection_init(). */
182 or_connection_new(int socket_family
)
184 or_connection_t
*or_conn
= tor_malloc_zero(sizeof(or_connection_t
));
185 time_t now
= time(NULL
);
186 connection_init(now
, TO_CONN(or_conn
), CONN_TYPE_OR
, socket_family
);
188 or_conn
->timestamp_last_added_nonpadding
= time(NULL
);
189 or_conn
->next_circ_id
= crypto_rand_int(1<<15);
191 or_conn
->active_circuit_pqueue
= smartlist_create();
192 or_conn
->active_circuit_pqueue_last_recalibrated
= cell_ewma_get_tick();
197 /** Allocate and return a new edge_connection_t, initialized as by
198 * connection_init(). */
200 edge_connection_new(int type
, int socket_family
)
202 edge_connection_t
*edge_conn
= tor_malloc_zero(sizeof(edge_connection_t
));
203 tor_assert(type
== CONN_TYPE_EXIT
|| type
== CONN_TYPE_AP
);
204 connection_init(time(NULL
), TO_CONN(edge_conn
), type
, socket_family
);
205 if (type
== CONN_TYPE_AP
)
206 edge_conn
->socks_request
= tor_malloc_zero(sizeof(socks_request_t
));
210 /** Allocate and return a new control_connection_t, initialized as by
211 * connection_init(). */
212 control_connection_t
*
213 control_connection_new(int socket_family
)
215 control_connection_t
*control_conn
=
216 tor_malloc_zero(sizeof(control_connection_t
));
217 connection_init(time(NULL
),
218 TO_CONN(control_conn
), CONN_TYPE_CONTROL
, socket_family
);
219 log_notice(LD_CONTROL
, "New control connection opened.");
223 /** Allocate, initialize, and return a new connection_t subtype of <b>type</b>
224 * to make or receive connections of address family <b>socket_family</b>. The
225 * type should be one of the CONN_TYPE_* constants. */
227 connection_new(int type
, int socket_family
)
231 return TO_CONN(or_connection_new(socket_family
));
235 return TO_CONN(edge_connection_new(type
, socket_family
));
238 return TO_CONN(dir_connection_new(socket_family
));
240 case CONN_TYPE_CONTROL
:
241 return TO_CONN(control_connection_new(socket_family
));
244 connection_t
*conn
= tor_malloc_zero(sizeof(connection_t
));
245 connection_init(time(NULL
), conn
, type
, socket_family
);
251 /** Initializes conn. (you must call connection_add() to link it into the main
254 * Set conn-\>type to <b>type</b>. Set conn-\>s and conn-\>conn_array_index to
255 * -1 to signify they are not yet assigned.
257 * If conn is not a listener type, allocate buffers for it. If it's
258 * an AP type, allocate space to store the socks_request.
260 * Assign a pseudorandom next_circ_id between 0 and 2**15.
262 * Initialize conn's timestamps to now.
265 connection_init(time_t now
, connection_t
*conn
, int type
, int socket_family
)
267 static uint64_t n_connections_allocated
= 1;
271 conn
->magic
= OR_CONNECTION_MAGIC
;
275 conn
->magic
= EDGE_CONNECTION_MAGIC
;
278 conn
->magic
= DIR_CONNECTION_MAGIC
;
280 case CONN_TYPE_CONTROL
:
281 conn
->magic
= CONTROL_CONNECTION_MAGIC
;
284 conn
->magic
= BASE_CONNECTION_MAGIC
;
288 conn
->s
= -1; /* give it a default of 'not used' */
289 conn
->conn_array_index
= -1; /* also default to 'not used' */
290 conn
->global_identifier
= n_connections_allocated
++;
293 conn
->socket_family
= socket_family
;
294 if (!connection_is_listener(conn
)) { /* listeners never use their buf */
295 conn
->inbuf
= buf_new();
296 conn
->outbuf
= buf_new();
299 conn
->timestamp_created
= now
;
300 conn
->timestamp_lastread
= now
;
301 conn
->timestamp_lastwritten
= now
;
304 /** Create a link between <b>conn_a</b> and <b>conn_b</b>. */
306 connection_link_connections(connection_t
*conn_a
, connection_t
*conn_b
)
308 tor_assert(conn_a
->s
< 0);
309 tor_assert(conn_b
->s
< 0);
313 conn_a
->linked_conn
= conn_b
;
314 conn_b
->linked_conn
= conn_a
;
317 /** Deallocate memory used by <b>conn</b>. Deallocate its buffers if
318 * necessary, close its socket if necessary, and mark the directory as dirty
319 * if <b>conn</b> is an OR or OP connection.
322 _connection_free(connection_t
*conn
)
329 switch (conn
->type
) {
331 tor_assert(conn
->magic
== OR_CONNECTION_MAGIC
);
332 mem
= TO_OR_CONN(conn
);
333 memlen
= sizeof(or_connection_t
);
337 tor_assert(conn
->magic
== EDGE_CONNECTION_MAGIC
);
338 mem
= TO_EDGE_CONN(conn
);
339 memlen
= sizeof(edge_connection_t
);
342 tor_assert(conn
->magic
== DIR_CONNECTION_MAGIC
);
343 mem
= TO_DIR_CONN(conn
);
344 memlen
= sizeof(dir_connection_t
);
346 case CONN_TYPE_CONTROL
:
347 tor_assert(conn
->magic
== CONTROL_CONNECTION_MAGIC
);
348 mem
= TO_CONTROL_CONN(conn
);
349 memlen
= sizeof(control_connection_t
);
352 tor_assert(conn
->magic
== BASE_CONNECTION_MAGIC
);
354 memlen
= sizeof(connection_t
);
359 log_info(LD_GENERAL
, "Freeing linked %s connection [%s] with %d "
360 "bytes on inbuf, %d on outbuf.",
361 conn_type_to_string(conn
->type
),
362 conn_state_to_string(conn
->type
, conn
->state
),
363 (int)buf_datalen(conn
->inbuf
), (int)buf_datalen(conn
->outbuf
));
366 if (!connection_is_listener(conn
)) {
367 buf_free(conn
->inbuf
);
368 buf_free(conn
->outbuf
);
370 if (conn
->socket_family
== AF_UNIX
) {
371 /* For now only control ports can be Unix domain sockets
372 * and listeners at the same time */
373 tor_assert(conn
->type
== CONN_TYPE_CONTROL_LISTENER
);
375 if (unlink(conn
->address
) < 0 && errno
!= ENOENT
) {
376 log_warn(LD_NET
, "Could not unlink %s: %s", conn
->address
,
382 tor_free(conn
->address
);
384 if (connection_speaks_cells(conn
)) {
385 or_connection_t
*or_conn
= TO_OR_CONN(conn
);
386 tor_tls_free(or_conn
->tls
);
388 or_handshake_state_free(or_conn
->handshake_state
);
389 or_conn
->handshake_state
= NULL
;
390 smartlist_free(or_conn
->active_circuit_pqueue
);
391 tor_free(or_conn
->nickname
);
393 if (CONN_IS_EDGE(conn
)) {
394 edge_connection_t
*edge_conn
= TO_EDGE_CONN(conn
);
395 tor_free(edge_conn
->chosen_exit_name
);
396 if (edge_conn
->socks_request
) {
397 memset(edge_conn
->socks_request
, 0xcc, sizeof(socks_request_t
));
398 tor_free(edge_conn
->socks_request
);
401 rend_data_free(edge_conn
->rend_data
);
403 if (conn
->type
== CONN_TYPE_CONTROL
) {
404 control_connection_t
*control_conn
= TO_CONTROL_CONN(conn
);
405 tor_free(control_conn
->incoming_cmd
);
408 tor_free(conn
->read_event
); /* Probably already freed by connection_free. */
409 tor_free(conn
->write_event
); /* Probably already freed by connection_free. */
411 if (conn
->type
== CONN_TYPE_DIR
) {
412 dir_connection_t
*dir_conn
= TO_DIR_CONN(conn
);
413 tor_free(dir_conn
->requested_resource
);
415 tor_zlib_free(dir_conn
->zlib_state
);
416 if (dir_conn
->fingerprint_stack
) {
417 SMARTLIST_FOREACH(dir_conn
->fingerprint_stack
, char *, cp
, tor_free(cp
));
418 smartlist_free(dir_conn
->fingerprint_stack
);
421 cached_dir_decref(dir_conn
->cached_dir
);
422 rend_data_free(dir_conn
->rend_data
);
426 log_debug(LD_NET
,"closing fd %d.",conn
->s
);
427 tor_close_socket(conn
->s
);
431 if (conn
->type
== CONN_TYPE_OR
&&
432 !tor_digest_is_zero(TO_OR_CONN(conn
)->identity_digest
)) {
433 log_warn(LD_BUG
, "called on OR conn with non-zeroed identity_digest");
434 connection_or_remove_from_identity_map(TO_OR_CONN(conn
));
437 memset(mem
, 0xCC, memlen
); /* poison memory */
441 /** Make sure <b>conn</b> isn't in any of the global conn lists; then free it.
444 connection_free(connection_t
*conn
)
448 tor_assert(!connection_is_on_closeable_list(conn
));
449 tor_assert(!connection_in_array(conn
));
450 if (conn
->linked_conn
) {
451 log_err(LD_BUG
, "Called with conn->linked_conn still set.");
452 tor_fragile_assert();
453 conn
->linked_conn
->linked_conn
= NULL
;
454 if (! conn
->linked_conn
->marked_for_close
&&
455 conn
->linked_conn
->reading_from_linked_conn
)
456 connection_start_reading(conn
->linked_conn
);
457 conn
->linked_conn
= NULL
;
459 if (connection_speaks_cells(conn
)) {
460 if (!tor_digest_is_zero(TO_OR_CONN(conn
)->identity_digest
)) {
461 connection_or_remove_from_identity_map(TO_OR_CONN(conn
));
464 if (conn
->type
== CONN_TYPE_CONTROL
) {
465 TO_CONTROL_CONN(conn
)->event_mask
= 0;
466 control_update_global_event_mask();
468 connection_unregister_events(conn
);
469 _connection_free(conn
);
472 /** Call _connection_free() on every connection in our array, and release all
473 * storage held by connection.c. This is used by cpuworkers and dnsworkers
474 * when they fork, so they don't keep resources held open (especially
477 * Don't do the checks in connection_free(), because they will
481 connection_free_all(void)
483 smartlist_t
*conns
= get_connection_array();
485 /* We don't want to log any messages to controllers. */
486 SMARTLIST_FOREACH(conns
, connection_t
*, conn
,
487 if (conn
->type
== CONN_TYPE_CONTROL
)
488 TO_CONTROL_CONN(conn
)->event_mask
= 0);
490 control_update_global_event_mask();
492 /* Unlink everything from the identity map. */
493 connection_or_clear_identity_map();
495 SMARTLIST_FOREACH(conns
, connection_t
*, conn
, _connection_free(conn
));
497 if (outgoing_addrs
) {
498 SMARTLIST_FOREACH(outgoing_addrs
, void*, addr
, tor_free(addr
));
499 smartlist_free(outgoing_addrs
);
500 outgoing_addrs
= NULL
;
504 /** Do any cleanup needed:
505 * - Directory conns that failed to fetch a rendezvous descriptor
506 * need to inform pending rendezvous streams.
507 * - OR conns need to call rep_hist_note_*() to record status.
508 * - AP conns need to send a socks reject if necessary.
509 * - Exit conns need to call connection_dns_remove() if necessary.
510 * - AP and Exit conns need to send an end cell if they can.
511 * - DNS conns need to fail any resolves that are pending on them.
512 * - OR and edge connections need to be unlinked from circuits.
515 connection_about_to_close_connection(connection_t
*conn
)
518 dir_connection_t
*dir_conn
;
519 or_connection_t
*or_conn
;
520 edge_connection_t
*edge_conn
;
521 time_t now
= time(NULL
);
523 tor_assert(conn
->marked_for_close
);
525 if (CONN_IS_EDGE(conn
)) {
526 edge_conn
= TO_EDGE_CONN(conn
);
527 if (!edge_conn
->edge_has_sent_end
) {
528 log_warn(LD_BUG
, "(Harmless.) Edge connection (marked at %s:%d) "
529 "hasn't sent end yet?",
530 conn
->marked_for_close_file
, conn
->marked_for_close
);
531 tor_fragile_assert();
535 switch (conn
->type
) {
537 dir_conn
= TO_DIR_CONN(conn
);
538 if (conn
->state
< DIR_CONN_STATE_CLIENT_FINISHED
) {
539 /* It's a directory connection and connecting or fetching
540 * failed: forget about this router, and maybe try again. */
541 connection_dir_request_failed(dir_conn
);
543 /* If we were trying to fetch a v2 rend desc and did not succeed,
544 * retry as needed. (If a fetch is successful, the connection state
545 * is changed to DIR_PURPOSE_HAS_FETCHED_RENDDESC to mark that
546 * refetching is unnecessary.) */
547 if (conn
->purpose
== DIR_PURPOSE_FETCH_RENDDESC_V2
&&
548 dir_conn
->rend_data
&&
549 strlen(dir_conn
->rend_data
->onion_address
) ==
550 REND_SERVICE_ID_LEN_BASE32
)
551 rend_client_refetch_v2_renddesc(dir_conn
->rend_data
);
554 or_conn
= TO_OR_CONN(conn
);
555 /* Remember why we're closing this connection. */
556 if (conn
->state
!= OR_CONN_STATE_OPEN
) {
557 /* Inform any pending (not attached) circs that they should
559 circuit_n_conn_done(TO_OR_CONN(conn
), 0);
560 /* now mark things down as needed */
561 if (connection_or_nonopen_was_started_here(or_conn
)) {
562 or_options_t
*options
= get_options();
563 rep_hist_note_connect_failed(or_conn
->identity_digest
, now
);
564 entry_guard_register_connect_status(or_conn
->identity_digest
,0,
565 !options
->HttpsProxy
, now
);
566 if (conn
->state
>= OR_CONN_STATE_TLS_HANDSHAKING
) {
567 int reason
= tls_error_to_orconn_end_reason(or_conn
->tls_error
);
568 control_event_or_conn_status(or_conn
, OR_CONN_EVENT_FAILED
,
570 if (!authdir_mode_tests_reachability(options
))
571 control_event_bootstrap_problem(
572 orconn_end_reason_to_control_string(reason
), reason
);
575 } else if (conn
->hold_open_until_flushed
) {
576 /* We only set hold_open_until_flushed when we're intentionally
577 * closing a connection. */
578 rep_hist_note_disconnect(or_conn
->identity_digest
, now
);
579 control_event_or_conn_status(or_conn
, OR_CONN_EVENT_CLOSED
,
580 tls_error_to_orconn_end_reason(or_conn
->tls_error
));
581 } else if (!tor_digest_is_zero(or_conn
->identity_digest
)) {
582 rep_hist_note_connection_died(or_conn
->identity_digest
, now
);
583 control_event_or_conn_status(or_conn
, OR_CONN_EVENT_CLOSED
,
584 tls_error_to_orconn_end_reason(or_conn
->tls_error
));
586 /* Now close all the attached circuits on it. */
587 circuit_unlink_all_from_or_conn(TO_OR_CONN(conn
),
588 END_CIRC_REASON_OR_CONN_CLOSED
);
591 edge_conn
= TO_EDGE_CONN(conn
);
592 if (edge_conn
->socks_request
->has_finished
== 0) {
593 /* since conn gets removed right after this function finishes,
594 * there's no point trying to send back a reply at this point. */
595 log_warn(LD_BUG
,"Closing stream (marked at %s:%d) without sending"
596 " back a socks reply.",
597 conn
->marked_for_close_file
, conn
->marked_for_close
);
599 if (!edge_conn
->end_reason
) {
600 log_warn(LD_BUG
,"Closing stream (marked at %s:%d) without having"
602 conn
->marked_for_close_file
, conn
->marked_for_close
);
604 if (edge_conn
->dns_server_request
) {
605 log_warn(LD_BUG
,"Closing stream (marked at %s:%d) without having"
606 " replied to DNS request.",
607 conn
->marked_for_close_file
, conn
->marked_for_close
);
608 dnsserv_reject_request(edge_conn
);
610 control_event_stream_bandwidth(edge_conn
);
611 control_event_stream_status(edge_conn
, STREAM_EVENT_CLOSED
,
612 edge_conn
->end_reason
);
613 circ
= circuit_get_by_edge_conn(edge_conn
);
615 circuit_detach_stream(circ
, edge_conn
);
618 edge_conn
= TO_EDGE_CONN(conn
);
619 circ
= circuit_get_by_edge_conn(edge_conn
);
621 circuit_detach_stream(circ
, edge_conn
);
622 if (conn
->state
== EXIT_CONN_STATE_RESOLVING
) {
623 connection_dns_remove(edge_conn
);
629 /** Return true iff connection_close_immediate() has been called on this
631 #define CONN_IS_CLOSED(c) \
632 ((c)->linked ? ((c)->linked_conn_is_closed) : ((c)->s < 0))
634 /** Close the underlying socket for <b>conn</b>, so we don't try to
635 * flush it. Must be used in conjunction with (right before)
636 * connection_mark_for_close().
639 connection_close_immediate(connection_t
*conn
)
641 assert_connection_ok(conn
,0);
642 if (CONN_IS_CLOSED(conn
)) {
643 log_err(LD_BUG
,"Attempt to close already-closed connection.");
644 tor_fragile_assert();
647 if (conn
->outbuf_flushlen
) {
648 log_info(LD_NET
,"fd %d, type %s, state %s, %d bytes on outbuf.",
649 conn
->s
, conn_type_to_string(conn
->type
),
650 conn_state_to_string(conn
->type
, conn
->state
),
651 (int)conn
->outbuf_flushlen
);
654 connection_unregister_events(conn
);
657 tor_close_socket(conn
->s
);
660 conn
->linked_conn_is_closed
= 1;
661 if (!connection_is_listener(conn
)) {
662 buf_clear(conn
->outbuf
);
663 conn
->outbuf_flushlen
= 0;
667 /** Mark <b>conn</b> to be closed next time we loop through
668 * conn_close_if_marked() in main.c. */
670 _connection_mark_for_close(connection_t
*conn
, int line
, const char *file
)
672 assert_connection_ok(conn
,0);
674 tor_assert(line
< 1<<16); /* marked_for_close can only fit a uint16_t. */
677 if (conn
->marked_for_close
) {
678 log(LOG_WARN
,LD_BUG
,"Duplicate call to connection_mark_for_close at %s:%d"
679 " (first at %s:%d)", file
, line
, conn
->marked_for_close_file
,
680 conn
->marked_for_close
);
681 tor_fragile_assert();
685 conn
->marked_for_close
= line
;
686 conn
->marked_for_close_file
= file
;
687 add_connection_to_closeable_list(conn
);
689 /* in case we're going to be held-open-til-flushed, reset
690 * the number of seconds since last successful write, so
691 * we get our whole 15 seconds */
692 conn
->timestamp_lastwritten
= time(NULL
);
695 /** Find each connection that has hold_open_until_flushed set to
696 * 1 but hasn't written in the past 15 seconds, and set
697 * hold_open_until_flushed to 0. This means it will get cleaned
698 * up in the next loop through close_if_marked() in main.c.
701 connection_expire_held_open(void)
704 smartlist_t
*conns
= get_connection_array();
708 SMARTLIST_FOREACH(conns
, connection_t
*, conn
,
710 /* If we've been holding the connection open, but we haven't written
713 if (conn
->hold_open_until_flushed
) {
714 tor_assert(conn
->marked_for_close
);
715 if (now
- conn
->timestamp_lastwritten
>= 15) {
717 if (conn
->type
== CONN_TYPE_EXIT
||
718 (conn
->type
== CONN_TYPE_DIR
&&
719 conn
->purpose
== DIR_PURPOSE_SERVER
))
722 severity
= LOG_NOTICE
;
723 log_fn(severity
, LD_NET
,
724 "Giving up on marked_for_close conn that's been flushing "
725 "for 15s (fd %d, type %s, state %s).",
726 conn
->s
, conn_type_to_string(conn
->type
),
727 conn_state_to_string(conn
->type
, conn
->state
));
728 conn
->hold_open_until_flushed
= 0;
734 /** Create an AF_INET listenaddr struct.
735 * <b>listenaddress</b> provides the host and optionally the port information
736 * for the new structure. If no port is provided in <b>listenaddress</b> then
737 * <b>listenport</b> is used.
739 * If not NULL <b>readable_address</b> will contain a copy of the host part of
740 * <b>listenaddress</b>.
742 * The listenaddr struct has to be freed by the caller.
744 static struct sockaddr_in
*
745 create_inet_sockaddr(const char *listenaddress
, uint16_t listenport
,
746 char **readable_address
, socklen_t
*socklen_out
) {
747 struct sockaddr_in
*listenaddr
= NULL
;
749 uint16_t usePort
= 0;
751 if (parse_addr_port(LOG_WARN
,
752 listenaddress
, readable_address
, &addr
, &usePort
)<0) {
754 "Error parsing/resolving ListenAddress %s", listenaddress
);
758 usePort
= listenport
;
760 listenaddr
= tor_malloc_zero(sizeof(struct sockaddr_in
));
761 listenaddr
->sin_addr
.s_addr
= htonl(addr
);
762 listenaddr
->sin_family
= AF_INET
;
763 listenaddr
->sin_port
= htons((uint16_t) usePort
);
765 *socklen_out
= sizeof(struct sockaddr_in
);
770 tor_free(listenaddr
);
775 /** Create an AF_UNIX listenaddr struct.
776 * <b>listenaddress</b> provides the path to the Unix socket.
778 * Eventually <b>listenaddress</b> will also optionally contain user, group,
779 * and file permissions for the new socket. But not yet. XXX
780 * Also, since we do not create the socket here the information doesn't help
783 * If not NULL <b>readable_address</b> will contain a copy of the path part of
784 * <b>listenaddress</b>.
786 * The listenaddr struct has to be freed by the caller.
788 static struct sockaddr_un
*
789 create_unix_sockaddr(const char *listenaddress
, char **readable_address
,
792 struct sockaddr_un
*sockaddr
= NULL
;
794 sockaddr
= tor_malloc_zero(sizeof(struct sockaddr_un
));
795 sockaddr
->sun_family
= AF_UNIX
;
796 strncpy(sockaddr
->sun_path
, listenaddress
, sizeof(sockaddr
->sun_path
));
798 if (readable_address
)
799 *readable_address
= tor_strdup(listenaddress
);
801 *len_out
= sizeof(struct sockaddr_un
);
805 static struct sockaddr
*
806 create_unix_sockaddr(const char *listenaddress
, char **readable_address
,
810 (void)readable_address
;
811 log_fn(LOG_ERR
, LD_BUG
,
812 "Unix domain sockets not supported, yet we tried to create one.");
816 #endif /* HAVE_SYS_UN_H */
818 /** Warn that an accept or a connect has failed because we're running up
819 * against our ulimit. Rate-limit these warnings so that we don't spam
822 warn_too_many_conns(void)
824 #define WARN_TOO_MANY_CONNS_INTERVAL (6*60*60)
825 static time_t last_warned
= 0;
826 time_t now
= time(NULL
);
827 int n_conns
= get_n_open_sockets();
828 if (last_warned
+ WARN_TOO_MANY_CONNS_INTERVAL
< now
) {
829 log_warn(LD_NET
,"Failing because we have %d connections already. Please "
830 "raise your ulimit -n.", n_conns
);
832 control_event_general_status(LOG_WARN
, "TOO_MANY_CONNECTIONS CURRENT=%d",
837 /** Bind a new non-blocking socket listening to the socket described
838 * by <b>listensockaddr</b>.
840 * <b>address</b> is only used for logging purposes and to add the information
843 static connection_t
*
844 connection_create_listener(struct sockaddr
*listensockaddr
, socklen_t socklen
,
845 int type
, char* address
)
848 int s
; /* the socket we're going to make */
849 uint16_t usePort
= 0;
850 int start_reading
= 0;
852 if (get_n_open_sockets() >= get_options()->_ConnLimit
-1) {
853 warn_too_many_conns();
857 if (listensockaddr
->sa_family
== AF_INET
) {
858 int is_tcp
= (type
!= CONN_TYPE_AP_DNS_LISTENER
);
865 usePort
= ntohs( (uint16_t)
866 ((struct sockaddr_in
*)listensockaddr
)->sin_port
);
868 log_notice(LD_NET
, "Opening %s on %s:%d",
869 conn_type_to_string(type
), address
, usePort
);
871 s
= tor_open_socket(PF_INET
,
872 is_tcp
? SOCK_STREAM
: SOCK_DGRAM
,
873 is_tcp
? IPPROTO_TCP
: IPPROTO_UDP
);
875 log_warn(LD_NET
,"Socket creation failed.");
880 /* REUSEADDR on normal places means you can rebind to the port
881 * right after somebody else has let it go. But REUSEADDR on win32
882 * means you can bind to the port _even when somebody else
883 * already has it bound_. So, don't do that on Win32. */
884 setsockopt(s
, SOL_SOCKET
, SO_REUSEADDR
, (void*) &one
,
885 (socklen_t
)sizeof(one
));
888 if (bind(s
,listensockaddr
,socklen
) < 0) {
889 const char *helpfulhint
= "";
890 int e
= tor_socket_errno(s
);
891 if (ERRNO_IS_EADDRINUSE(e
))
892 helpfulhint
= ". Is Tor already running?";
893 log_warn(LD_NET
, "Could not bind to %s:%u: %s%s", address
, usePort
,
894 tor_socket_strerror(e
), helpfulhint
);
900 if (listen(s
,SOMAXCONN
) < 0) {
901 log_warn(LD_NET
, "Could not listen on %s:%u: %s", address
, usePort
,
902 tor_socket_strerror(tor_socket_errno(s
)));
908 } else if (listensockaddr
->sa_family
== AF_UNIX
) {
911 /* For now only control ports can be Unix domain sockets
912 * and listeners at the same time */
913 tor_assert(type
== CONN_TYPE_CONTROL_LISTENER
);
915 log_notice(LD_NET
, "Opening %s on %s",
916 conn_type_to_string(type
), address
);
918 if (unlink(address
) < 0 && errno
!= ENOENT
) {
919 log_warn(LD_NET
, "Could not unlink %s: %s", address
,
923 s
= tor_open_socket(AF_UNIX
, SOCK_STREAM
, 0);
925 log_warn(LD_NET
,"Socket creation failed: %s.", strerror(errno
));
929 if (bind(s
, listensockaddr
, (socklen_t
)sizeof(struct sockaddr_un
)) == -1) {
930 log_warn(LD_NET
,"Bind to %s failed: %s.", address
,
931 tor_socket_strerror(tor_socket_errno(s
)));
935 if (listen(s
,SOMAXCONN
) < 0) {
936 log_warn(LD_NET
, "Could not listen on %s: %s", address
,
937 tor_socket_strerror(tor_socket_errno(s
)));
941 #endif /* HAVE_SYS_UN_H */
943 log_err(LD_BUG
,"Got unexpected address family %d.",
944 listensockaddr
->sa_family
);
948 set_socket_nonblocking(s
);
950 conn
= connection_new(type
, listensockaddr
->sa_family
);
951 conn
->socket_family
= listensockaddr
->sa_family
;
953 conn
->address
= tor_strdup(address
);
954 conn
->port
= usePort
;
956 if (connection_add(conn
) < 0) { /* no space, forget it */
957 log_warn(LD_NET
,"connection_add for listener failed. Giving up.");
958 connection_free(conn
);
962 log_debug(LD_NET
,"%s listening on port %u.",
963 conn_type_to_string(type
), usePort
);
965 conn
->state
= LISTENER_STATE_READY
;
967 connection_start_reading(conn
);
969 tor_assert(type
== CONN_TYPE_AP_DNS_LISTENER
);
970 dnsserv_configure_listener(conn
);
979 /** Do basic sanity checking on a newly received socket. Return 0
980 * if it looks ok, else return -1. */
982 check_sockaddr(struct sockaddr
*sa
, int len
, int level
)
986 if (sa
->sa_family
== AF_INET
) {
987 struct sockaddr_in
*sin
=(struct sockaddr_in
*)sa
;
988 if (len
!= sizeof(struct sockaddr_in
)) {
989 log_fn(level
, LD_NET
, "Length of address not as expected: %d vs %d",
990 len
,(int)sizeof(struct sockaddr_in
));
993 if (sin
->sin_addr
.s_addr
== 0 || sin
->sin_port
== 0) {
994 log_fn(level
, LD_NET
,
995 "Address for new connection has address/port equal to zero.");
998 } else if (sa
->sa_family
== AF_INET6
) {
999 struct sockaddr_in6
*sin6
=(struct sockaddr_in6
*)sa
;
1000 if (len
!= sizeof(struct sockaddr_in6
)) {
1001 log_fn(level
, LD_NET
, "Length of address not as expected: %d vs %d",
1002 len
,(int)sizeof(struct sockaddr_in6
));
1005 if (tor_mem_is_zero((void*)sin6
->sin6_addr
.s6_addr
, 16) ||
1006 sin6
->sin6_port
== 0) {
1007 log_fn(level
, LD_NET
,
1008 "Address for new connection has address/port equal to zero.");
1017 /** Check whether the socket family from an accepted socket <b>got</b> is the
1018 * same as the one that <b>listener</b> is waiting for. If it isn't, log
1019 * a useful message and return -1. Else return 0.
1021 * This is annoying, but can apparently happen on some Darwins. */
1023 check_sockaddr_family_match(sa_family_t got
, connection_t
*listener
)
1025 if (got
!= listener
->socket_family
) {
1026 log_info(LD_BUG
, "A listener connection returned a socket with a "
1027 "mismatched family. %s for addr_family %d gave us a socket "
1028 "with address family %d. Dropping.",
1029 conn_type_to_string(listener
->type
),
1030 (int)listener
->socket_family
,
1037 /** The listener connection <b>conn</b> told poll() it wanted to read.
1038 * Call accept() on conn-\>s, and add the new connection if necessary.
1041 connection_handle_listener_read(connection_t
*conn
, int new_type
)
1043 int news
; /* the new socket */
1044 connection_t
*newconn
;
1045 /* information about the remote peer when connecting to other routers */
1047 struct sockaddr
*remote
= (struct sockaddr
*)addrbuf
;
1048 /* length of the remote address. Must be whatever accept() needs. */
1049 socklen_t remotelen
= (socklen_t
)sizeof(addrbuf
);
1050 or_options_t
*options
= get_options();
1052 tor_assert((size_t)remotelen
>= sizeof(struct sockaddr_in
));
1053 memset(addrbuf
, 0, sizeof(addrbuf
));
1055 news
= tor_accept_socket(conn
->s
,remote
,&remotelen
);
1056 if (news
< 0) { /* accept() error */
1057 int e
= tor_socket_errno(conn
->s
);
1058 if (ERRNO_IS_ACCEPT_EAGAIN(e
)) {
1059 return 0; /* he hung up before we could accept(). that's fine. */
1060 } else if (ERRNO_IS_ACCEPT_RESOURCE_LIMIT(e
)) {
1061 warn_too_many_conns();
1064 /* else there was a real error. */
1065 log_warn(LD_NET
,"accept() failed: %s. Closing listener.",
1066 tor_socket_strerror(e
));
1067 connection_mark_for_close(conn
);
1071 "Connection accepted on socket %d (child of fd %d).",
1074 set_socket_nonblocking(news
);
1076 if (options
->ConstrainedSockets
)
1077 set_constrained_socket_buffers(news
, (int)options
->ConstrainedSockSize
);
1079 if (check_sockaddr_family_match(remote
->sa_family
, conn
) < 0) {
1080 tor_close_socket(news
);
1084 if (conn
->socket_family
== AF_INET
|| conn
->socket_family
== AF_INET6
) {
1087 if (check_sockaddr(remote
, remotelen
, LOG_INFO
)<0) {
1089 "accept() returned a strange address; trying getsockname().");
1090 remotelen
=sizeof(addrbuf
);
1091 memset(addrbuf
, 0, sizeof(addrbuf
));
1092 if (getsockname(news
, remote
, &remotelen
)<0) {
1093 int e
= tor_socket_errno(news
);
1094 log_warn(LD_NET
, "getsockname() for new connection failed: %s",
1095 tor_socket_strerror(e
));
1097 if (check_sockaddr((struct sockaddr
*)addrbuf
, remotelen
,
1099 log_warn(LD_NET
,"Something's wrong with this conn. Closing it.");
1100 tor_close_socket(news
);
1106 if (check_sockaddr_family_match(remote
->sa_family
, conn
) < 0) {
1107 tor_close_socket(news
);
1111 tor_addr_from_sockaddr(&addr
, remote
, &port
);
1113 /* process entrance policies here, before we even create the connection */
1114 if (new_type
== CONN_TYPE_AP
) {
1115 /* check sockspolicy to see if we should accept it */
1116 if (socks_policy_permits_address(&addr
) == 0) {
1118 "Denying socks connection from untrusted address %s.",
1120 tor_close_socket(news
);
1124 if (new_type
== CONN_TYPE_DIR
) {
1125 /* check dirpolicy to see if we should accept it */
1126 if (dir_policy_permits_address(&addr
) == 0) {
1127 log_notice(LD_DIRSERV
,"Denying dir connection from address %s.",
1129 tor_close_socket(news
);
1134 newconn
= connection_new(new_type
, conn
->socket_family
);
1137 /* remember the remote address */
1138 tor_addr_copy(&newconn
->addr
, &addr
);
1139 newconn
->port
= port
;
1140 newconn
->address
= tor_dup_addr(&addr
);
1142 } else if (conn
->socket_family
== AF_UNIX
) {
1143 /* For now only control ports can be Unix domain sockets
1144 * and listeners at the same time */
1145 tor_assert(conn
->type
== CONN_TYPE_CONTROL_LISTENER
);
1147 newconn
= connection_new(new_type
, conn
->socket_family
);
1150 /* remember the remote address -- do we have anything sane to put here? */
1151 tor_addr_make_unspec(&newconn
->addr
);
1153 newconn
->address
= tor_strdup(conn
->address
);
1158 if (connection_add(newconn
) < 0) { /* no space, forget it */
1159 connection_free(newconn
);
1160 return 0; /* no need to tear down the parent */
1163 if (connection_init_accepted_conn(newconn
, conn
->type
) < 0) {
1164 connection_mark_for_close(newconn
);
1170 /** Initialize states for newly accepted connection <b>conn</b>.
1171 * If conn is an OR, start the TLS handshake.
1172 * If conn is a transparent AP, get its original destination
1173 * and place it in circuit_wait.
1176 connection_init_accepted_conn(connection_t
*conn
, uint8_t listener_type
)
1178 connection_start_reading(conn
);
1180 switch (conn
->type
) {
1182 control_event_or_conn_status(TO_OR_CONN(conn
), OR_CONN_EVENT_NEW
, 0);
1183 return connection_tls_start_handshake(TO_OR_CONN(conn
), 1);
1185 switch (listener_type
) {
1186 case CONN_TYPE_AP_LISTENER
:
1187 conn
->state
= AP_CONN_STATE_SOCKS_WAIT
;
1189 case CONN_TYPE_AP_TRANS_LISTENER
:
1190 conn
->state
= AP_CONN_STATE_CIRCUIT_WAIT
;
1191 return connection_ap_process_transparent(TO_EDGE_CONN(conn
));
1192 case CONN_TYPE_AP_NATD_LISTENER
:
1193 conn
->state
= AP_CONN_STATE_NATD_WAIT
;
1198 conn
->purpose
= DIR_PURPOSE_SERVER
;
1199 conn
->state
= DIR_CONN_STATE_SERVER_COMMAND_WAIT
;
1201 case CONN_TYPE_CONTROL
:
1202 conn
->state
= CONTROL_CONN_STATE_NEEDAUTH
;
1208 /** Take conn, make a nonblocking socket; try to connect to
1209 * addr:port (they arrive in *host order*). If fail, return -1 and if
1210 * applicable put your best guess about errno into *<b>socket_error</b>.
1211 * Else assign s to conn-\>s: if connected return 1, if EAGAIN return 0.
1213 * address is used to make the logs useful.
1215 * On success, add conn to the list of polled connections.
1218 connection_connect(connection_t
*conn
, const char *address
,
1219 const tor_addr_t
*addr
, uint16_t port
, int *socket_error
)
1221 int s
, inprogress
= 0;
1223 struct sockaddr
*dest_addr
= (struct sockaddr
*) addrbuf
;
1224 socklen_t dest_addr_len
;
1225 or_options_t
*options
= get_options();
1226 int protocol_family
;
1228 if (get_n_open_sockets() >= get_options()->_ConnLimit
-1) {
1229 warn_too_many_conns();
1233 if (tor_addr_family(addr
) == AF_INET6
)
1234 protocol_family
= PF_INET6
;
1236 protocol_family
= PF_INET
;
1238 s
= tor_open_socket(protocol_family
,SOCK_STREAM
,IPPROTO_TCP
);
1240 *socket_error
= tor_socket_errno(-1);
1241 log_warn(LD_NET
,"Error creating network socket: %s",
1242 tor_socket_strerror(*socket_error
));
1246 if (options
->OutboundBindAddress
&& !tor_addr_is_loopback(addr
)) {
1247 struct sockaddr_in ext_addr
;
1249 memset(&ext_addr
, 0, sizeof(ext_addr
));
1250 ext_addr
.sin_family
= AF_INET
;
1251 ext_addr
.sin_port
= 0;
1252 if (!tor_inet_aton(options
->OutboundBindAddress
, &ext_addr
.sin_addr
)) {
1253 log_warn(LD_CONFIG
,"Outbound bind address '%s' didn't parse. Ignoring.",
1254 options
->OutboundBindAddress
);
1256 if (bind(s
, (struct sockaddr
*)&ext_addr
,
1257 (socklen_t
)sizeof(ext_addr
)) < 0) {
1258 *socket_error
= tor_socket_errno(s
);
1259 log_warn(LD_NET
,"Error binding network socket: %s",
1260 tor_socket_strerror(*socket_error
));
1261 tor_close_socket(s
);
1267 set_socket_nonblocking(s
);
1269 if (options
->ConstrainedSockets
)
1270 set_constrained_socket_buffers(s
, (int)options
->ConstrainedSockSize
);
1272 memset(addrbuf
,0,sizeof(addrbuf
));
1273 dest_addr
= (struct sockaddr
*) addrbuf
;
1274 dest_addr_len
= tor_addr_to_sockaddr(addr
, port
, dest_addr
, sizeof(addrbuf
));
1275 tor_assert(dest_addr_len
> 0);
1277 log_debug(LD_NET
, "Connecting to %s:%u.",
1278 escaped_safe_str_client(address
), port
);
1280 if (connect(s
, dest_addr
, dest_addr_len
) < 0) {
1281 int e
= tor_socket_errno(s
);
1282 if (!ERRNO_IS_CONN_EINPROGRESS(e
)) {
1283 /* yuck. kill it. */
1286 "connect() to %s:%u failed: %s",
1287 escaped_safe_str_client(address
),
1288 port
, tor_socket_strerror(e
));
1289 tor_close_socket(s
);
1296 if (!server_mode(options
))
1297 client_check_address_changed(s
);
1299 /* it succeeded. we're connected. */
1300 log_fn(inprogress
?LOG_DEBUG
:LOG_INFO
, LD_NET
,
1301 "Connection to %s:%u %s (sock %d).",
1302 escaped_safe_str_client(address
),
1303 port
, inprogress
?"in progress":"established", s
);
1305 if (connection_add(conn
) < 0) /* no space, forget it */
1307 return inprogress
? 0 : 1;
1310 /** Convert state number to string representation for logging purposes.
1313 connection_proxy_state_to_string(int state
)
1315 static const char *unknown
= "???";
1316 static const char *states
[] = {
1318 "PROXY_HTTPS_WANT_CONNECT_OK",
1319 "PROXY_SOCKS4_WANT_CONNECT_OK",
1320 "PROXY_SOCKS5_WANT_AUTH_METHOD_NONE",
1321 "PROXY_SOCKS5_WANT_AUTH_METHOD_RFC1929",
1322 "PROXY_SOCKS5_WANT_AUTH_RFC1929_OK",
1323 "PROXY_SOCKS5_WANT_CONNECT_OK",
1327 if (state
< PROXY_NONE
|| state
> PROXY_CONNECTED
)
1330 return states
[state
];
1333 /** Write a proxy request of <b>type</b> (socks4, socks5, https) to conn
1334 * for conn->addr:conn->port, authenticating with the auth details given
1335 * in the configuration (if available). SOCKS 5 and HTTP CONNECT proxies
1336 * support authentication.
1338 * Returns -1 if conn->addr is incompatible with the proxy protocol, and
1341 * Use connection_read_proxy_handshake() to complete the handshake.
1344 connection_proxy_connect(connection_t
*conn
, int type
)
1346 or_options_t
*options
;
1350 options
= get_options();
1353 case PROXY_CONNECT
: {
1355 char *base64_authenticator
=NULL
;
1356 const char *authenticator
= options
->HttpsProxyAuthenticator
;
1358 /* Send HTTP CONNECT and authentication (if available) in
1361 if (authenticator
) {
1362 base64_authenticator
= alloc_http_authenticator(authenticator
);
1363 if (!base64_authenticator
)
1364 log_warn(LD_OR
, "Encoding https authenticator failed");
1367 if (base64_authenticator
) {
1368 tor_snprintf(buf
, sizeof(buf
), "CONNECT %s:%d HTTP/1.1\r\n"
1369 "Proxy-Authorization: Basic %s\r\n\r\n",
1370 fmt_addr(&conn
->addr
),
1371 conn
->port
, base64_authenticator
);
1372 tor_free(base64_authenticator
);
1374 tor_snprintf(buf
, sizeof(buf
), "CONNECT %s:%d HTTP/1.0\r\n\r\n",
1375 fmt_addr(&conn
->addr
), conn
->port
);
1378 connection_write_to_buf(buf
, strlen(buf
), conn
);
1379 conn
->proxy_state
= PROXY_HTTPS_WANT_CONNECT_OK
;
1383 case PROXY_SOCKS4
: {
1384 unsigned char buf
[9];
1388 /* Send a SOCKS4 connect request with empty user id */
1390 if (tor_addr_family(&conn
->addr
) != AF_INET
) {
1391 log_warn(LD_NET
, "SOCKS4 client is incompatible with IPv6");
1395 ip4addr
= tor_addr_to_ipv4n(&conn
->addr
);
1396 portn
= htons(conn
->port
);
1398 buf
[0] = 4; /* version */
1399 buf
[1] = SOCKS_COMMAND_CONNECT
; /* command */
1400 memcpy(buf
+ 2, &portn
, 2); /* port */
1401 memcpy(buf
+ 4, &ip4addr
, 4); /* addr */
1402 buf
[8] = 0; /* userid (empty) */
1404 connection_write_to_buf((char *)buf
, sizeof(buf
), conn
);
1405 conn
->proxy_state
= PROXY_SOCKS4_WANT_CONNECT_OK
;
1409 case PROXY_SOCKS5
: {
1410 unsigned char buf
[4]; /* fields: vers, num methods, method list */
1412 /* Send a SOCKS5 greeting (connect request must wait) */
1414 buf
[0] = 5; /* version */
1416 /* number of auth methods */
1417 if (options
->Socks5ProxyUsername
) {
1419 buf
[2] = 0x00; /* no authentication */
1420 buf
[3] = 0x02; /* rfc1929 Username/Passwd auth */
1421 conn
->proxy_state
= PROXY_SOCKS5_WANT_AUTH_METHOD_RFC1929
;
1424 buf
[2] = 0x00; /* no authentication */
1425 conn
->proxy_state
= PROXY_SOCKS5_WANT_AUTH_METHOD_NONE
;
1428 connection_write_to_buf((char *)buf
, 2 + buf
[1], conn
);
1433 log_err(LD_BUG
, "Invalid proxy protocol, %d", type
);
1434 tor_fragile_assert();
1438 log_debug(LD_NET
, "set state %s",
1439 connection_proxy_state_to_string(conn
->proxy_state
));
1444 /** Read conn's inbuf. If the http response from the proxy is all
1445 * here, make sure it's good news, then return 1. If it's bad news,
1446 * return -1. Else return 0 and hope for better luck next time.
1449 connection_read_https_proxy_response(connection_t
*conn
)
1456 switch (fetch_from_buf_http(conn
->inbuf
,
1457 &headers
, MAX_HEADERS_SIZE
,
1458 NULL
, NULL
, 10000, 0)) {
1459 case -1: /* overflow */
1460 log_warn(LD_PROTOCOL
,
1461 "Your https proxy sent back an oversized response. Closing.");
1464 log_info(LD_NET
,"https proxy response not all here yet. Waiting.");
1466 /* case 1, fall through */
1469 if (parse_http_response(headers
, &status_code
, &date_header
,
1470 NULL
, &reason
) < 0) {
1472 "Unparseable headers from proxy (connecting to '%s'). Closing.",
1477 if (!reason
) reason
= tor_strdup("[no reason given]");
1479 if (status_code
== 200) {
1481 "HTTPS connect to '%s' successful! (200 %s) Starting TLS.",
1482 conn
->address
, escaped(reason
));
1486 /* else, bad news on the status code */
1488 "The https proxy sent back an unexpected status code %d (%s). "
1490 status_code
, escaped(reason
));
1495 /** Send SOCKS5 CONNECT command to <b>conn</b>, copying <b>conn->addr</b>
1496 * and <b>conn->port</b> into the request.
1499 connection_send_socks5_connect(connection_t
*conn
)
1501 unsigned char buf
[1024];
1503 uint16_t port
= htons(conn
->port
);
1505 buf
[0] = 5; /* version */
1506 buf
[1] = SOCKS_COMMAND_CONNECT
; /* command */
1507 buf
[2] = 0; /* reserved */
1509 if (tor_addr_family(&conn
->addr
) == AF_INET
) {
1510 uint32_t addr
= tor_addr_to_ipv4n(&conn
->addr
);
1514 memcpy(buf
+ 4, &addr
, 4);
1515 memcpy(buf
+ 8, &port
, 2);
1516 } else { /* AF_INET6 */
1519 memcpy(buf
+ 4, tor_addr_to_in6(&conn
->addr
), 16);
1520 memcpy(buf
+ 20, &port
, 2);
1523 connection_write_to_buf((char *)buf
, reqsize
, conn
);
1525 conn
->proxy_state
= PROXY_SOCKS5_WANT_CONNECT_OK
;
1528 /** Call this from connection_*_process_inbuf() to advance the proxy
1531 * No matter what proxy protocol is used, if this function returns 1, the
1532 * handshake is complete, and the data remaining on inbuf may contain the
1533 * start of the communication with the requested server.
1535 * Returns 0 if the current buffer contains an incomplete response, and -1
1539 connection_read_proxy_handshake(connection_t
*conn
)
1542 char *reason
= NULL
;
1544 log_debug(LD_NET
, "enter state %s",
1545 connection_proxy_state_to_string(conn
->proxy_state
));
1547 switch (conn
->proxy_state
) {
1548 case PROXY_HTTPS_WANT_CONNECT_OK
:
1549 ret
= connection_read_https_proxy_response(conn
);
1551 conn
->proxy_state
= PROXY_CONNECTED
;
1554 case PROXY_SOCKS4_WANT_CONNECT_OK
:
1555 ret
= fetch_from_buf_socks_client(conn
->inbuf
,
1559 conn
->proxy_state
= PROXY_CONNECTED
;
1562 case PROXY_SOCKS5_WANT_AUTH_METHOD_NONE
:
1563 ret
= fetch_from_buf_socks_client(conn
->inbuf
,
1566 /* no auth needed, do connect */
1568 connection_send_socks5_connect(conn
);
1573 case PROXY_SOCKS5_WANT_AUTH_METHOD_RFC1929
:
1574 ret
= fetch_from_buf_socks_client(conn
->inbuf
,
1578 /* send auth if needed, otherwise do connect */
1580 connection_send_socks5_connect(conn
);
1582 } else if (ret
== 2) {
1583 unsigned char buf
[1024];
1584 size_t reqsize
, usize
, psize
;
1585 const char *user
, *pass
;
1587 user
= get_options()->Socks5ProxyUsername
;
1588 pass
= get_options()->Socks5ProxyPassword
;
1589 tor_assert(user
&& pass
);
1591 /* XXX len of user and pass must be <= 255 !!! */
1592 usize
= strlen(user
);
1593 psize
= strlen(pass
);
1594 tor_assert(usize
<= 255 && psize
<= 255);
1595 reqsize
= 3 + usize
+ psize
;
1597 buf
[0] = 1; /* negotiation version */
1599 memcpy(buf
+ 2, user
, usize
);
1600 buf
[2 + usize
] = psize
;
1601 memcpy(buf
+ 3 + usize
, pass
, psize
);
1603 connection_write_to_buf((char *)buf
, reqsize
, conn
);
1605 conn
->proxy_state
= PROXY_SOCKS5_WANT_AUTH_RFC1929_OK
;
1610 case PROXY_SOCKS5_WANT_AUTH_RFC1929_OK
:
1611 ret
= fetch_from_buf_socks_client(conn
->inbuf
,
1614 /* send the connect request */
1616 connection_send_socks5_connect(conn
);
1621 case PROXY_SOCKS5_WANT_CONNECT_OK
:
1622 ret
= fetch_from_buf_socks_client(conn
->inbuf
,
1626 conn
->proxy_state
= PROXY_CONNECTED
;
1630 log_err(LD_BUG
, "Invalid proxy_state for reading, %d",
1632 tor_fragile_assert();
1637 log_debug(LD_NET
, "leaving state %s",
1638 connection_proxy_state_to_string(conn
->proxy_state
));
1642 log_warn(LD_NET
, "Proxy Client: unable to connect to %s:%d (%s)",
1643 conn
->address
, conn
->port
, escaped(reason
));
1646 log_warn(LD_NET
, "Proxy Client: unable to connect to %s:%d",
1647 conn
->address
, conn
->port
);
1649 } else if (ret
== 1) {
1650 log_info(LD_NET
, "Proxy Client: connection to %s:%d successful",
1651 conn
->address
, conn
->port
);
1658 * Launch any configured listener connections of type <b>type</b>. (A
1659 * listener is configured if <b>port_option</b> is non-zero. If any
1660 * ListenAddress configuration options are given in <b>cfg</b>, create a
1661 * connection binding to each one. Otherwise, create a single
1662 * connection binding to the address <b>default_addr</b>.)
1664 * Only launch the listeners of this type that are not already open, and
1665 * only close listeners that are no longer wanted. Existing listeners
1666 * that are still configured are not touched.
1668 * If <b>disable_all_conns</b> is set, then never open new conns, and
1669 * close the existing ones.
1671 * Add all old conns that should be closed to <b>replaced_conns</b>.
1672 * Add all new connections to <b>new_conns</b>.
1675 retry_listeners(int type
, config_line_t
*cfg
,
1676 int port_option
, const char *default_addr
,
1677 smartlist_t
*replaced_conns
,
1678 smartlist_t
*new_conns
,
1679 int disable_all_conns
,
1682 smartlist_t
*launch
= smartlist_create(), *conns
;
1683 int free_launch_elts
= 1;
1687 config_line_t
*line
;
1689 tor_assert(socket_family
== AF_INET
|| socket_family
== AF_UNIX
);
1691 if (cfg
&& port_option
) {
1692 for (c
= cfg
; c
; c
= c
->next
) {
1693 smartlist_add(launch
, c
);
1695 free_launch_elts
= 0;
1696 } else if (port_option
) {
1697 line
= tor_malloc_zero(sizeof(config_line_t
));
1698 line
->key
= tor_strdup("");
1699 line
->value
= tor_strdup(default_addr
);
1700 smartlist_add(launch
, line
);
1704 SMARTLIST_FOREACH(launch, config_line_t *, l,
1705 log_fn(LOG_NOTICE, "#%s#%s", l->key, l->value));
1708 conns
= get_connection_array();
1709 SMARTLIST_FOREACH(conns
, connection_t
*, conn
,
1711 if (conn
->type
!= type
||
1712 conn
->socket_family
!= socket_family
||
1713 conn
->marked_for_close
)
1715 /* Okay, so this is a listener. Is it configured? */
1717 SMARTLIST_FOREACH(launch
, config_line_t
*, wanted
,
1721 switch (socket_family
) {
1723 if (!parse_addr_port(LOG_WARN
,
1724 wanted
->value
, &address
, NULL
, &port
)) {
1725 int addr_matches
= !strcasecmp(address
, conn
->address
);
1729 if (port
== conn
->port
&& addr_matches
) {
1736 if (!strcasecmp(wanted
->value
, conn
->address
)) {
1745 if (!line
|| disable_all_conns
) {
1746 /* This one isn't configured. Close it. */
1747 log_notice(LD_NET
, "Closing no-longer-configured %s on %s:%d",
1748 conn_type_to_string(type
), conn
->address
, conn
->port
);
1749 if (replaced_conns
) {
1750 smartlist_add(replaced_conns
, conn
);
1752 connection_close_immediate(conn
);
1753 connection_mark_for_close(conn
);
1756 /* It's configured; we don't need to launch it. */
1757 // log_debug(LD_NET, "Already have %s on %s:%d",
1758 // conn_type_to_string(type), conn->address, conn->port);
1759 smartlist_remove(launch
, line
);
1760 if (free_launch_elts
)
1761 config_free_lines(line
);
1765 /* Now open all the listeners that are configured but not opened. */
1767 if (!disable_all_conns
) {
1768 SMARTLIST_FOREACH_BEGIN(launch
, config_line_t
*, cfg_line
) {
1769 char *address
= NULL
;
1770 struct sockaddr
*listensockaddr
;
1771 socklen_t listensocklen
= 0;
1773 switch (socket_family
) {
1775 listensockaddr
= (struct sockaddr
*)
1776 create_inet_sockaddr(cfg_line
->value
,
1777 (uint16_t) port_option
,
1778 &address
, &listensocklen
);
1781 listensockaddr
= (struct sockaddr
*)
1782 create_unix_sockaddr(cfg_line
->value
,
1783 &address
, &listensocklen
);
1789 if (listensockaddr
) {
1790 conn
= connection_create_listener(listensockaddr
, listensocklen
,
1792 tor_free(listensockaddr
);
1801 smartlist_add(new_conns
, conn
);
1803 } SMARTLIST_FOREACH_END(cfg_line
);
1806 if (free_launch_elts
) {
1807 SMARTLIST_FOREACH(launch
, config_line_t
*, cfg_line
,
1808 config_free_lines(cfg_line
));
1810 smartlist_free(launch
);
1815 /** Launch listeners for each port you should have open. Only launch
1816 * listeners who are not already open, and only close listeners we no longer
1819 * Add all old conns that should be closed to <b>replaced_conns</b>.
1820 * Add all new connections to <b>new_conns</b>.
1823 retry_all_listeners(smartlist_t
*replaced_conns
,
1824 smartlist_t
*new_conns
)
1826 or_options_t
*options
= get_options();
1828 if (retry_listeners(CONN_TYPE_OR_LISTENER
, options
->ORListenAddress
,
1829 options
->ORPort
, "0.0.0.0",
1830 replaced_conns
, new_conns
, options
->ClientOnly
,
1833 if (retry_listeners(CONN_TYPE_DIR_LISTENER
, options
->DirListenAddress
,
1834 options
->DirPort
, "0.0.0.0",
1835 replaced_conns
, new_conns
, options
->ClientOnly
,
1838 if (retry_listeners(CONN_TYPE_AP_LISTENER
, options
->SocksListenAddress
,
1839 options
->SocksPort
, "127.0.0.1",
1840 replaced_conns
, new_conns
, 0,
1843 if (retry_listeners(CONN_TYPE_AP_TRANS_LISTENER
, options
->TransListenAddress
,
1844 options
->TransPort
, "127.0.0.1",
1845 replaced_conns
, new_conns
, 0,
1848 if (retry_listeners(CONN_TYPE_AP_NATD_LISTENER
, options
->NatdListenAddress
,
1849 options
->NatdPort
, "127.0.0.1",
1850 replaced_conns
, new_conns
, 0,
1853 if (retry_listeners(CONN_TYPE_AP_DNS_LISTENER
, options
->DNSListenAddress
,
1854 options
->DNSPort
, "127.0.0.1",
1855 replaced_conns
, new_conns
, 0,
1858 if (retry_listeners(CONN_TYPE_CONTROL_LISTENER
,
1859 options
->ControlListenAddress
,
1860 options
->ControlPort
, "127.0.0.1",
1861 replaced_conns
, new_conns
, 0,
1864 if (retry_listeners(CONN_TYPE_CONTROL_LISTENER
,
1865 options
->ControlSocket
,
1866 options
->ControlSocket
? 1 : 0, NULL
,
1867 replaced_conns
, new_conns
, 0,
1874 /** Return 1 if we should apply rate limiting to <b>conn</b>,
1875 * and 0 otherwise. Right now this just checks if it's an internal
1876 * IP address or an internal connection. */
1878 connection_is_rate_limited(connection_t
*conn
)
1880 if (conn
->linked
|| /* internal connection */
1881 tor_addr_family(&conn
->addr
) == AF_UNSPEC
|| /* no address */
1882 tor_addr_is_internal(&conn
->addr
, 0)) /* internal address */
1888 extern int global_read_bucket
, global_write_bucket
;
1889 extern int global_relayed_read_bucket
, global_relayed_write_bucket
;
1891 /** Did either global write bucket run dry last second? If so,
1892 * we are likely to run dry again this second, so be stingy with the
1893 * tokens we just put in. */
1894 static int write_buckets_empty_last_second
= 0;
1896 /** How many seconds of no active local circuits will make the
1897 * connection revert to the "relayed" bandwidth class? */
1898 #define CLIENT_IDLE_TIME_FOR_PRIORITY 30
1900 /** Return 1 if <b>conn</b> should use tokens from the "relayed"
1901 * bandwidth rates, else 0. Currently, only OR conns with bandwidth
1902 * class 1, and directory conns that are serving data out, count.
1905 connection_counts_as_relayed_traffic(connection_t
*conn
, time_t now
)
1907 if (conn
->type
== CONN_TYPE_OR
&&
1908 TO_OR_CONN(conn
)->client_used
+ CLIENT_IDLE_TIME_FOR_PRIORITY
< now
)
1910 if (conn
->type
== CONN_TYPE_DIR
&& DIR_CONN_IS_SERVER(conn
))
1915 /** Helper function to decide how many bytes out of <b>global_bucket</b>
1916 * we're willing to use for this transaction. <b>base</b> is the size
1917 * of a cell on the network; <b>priority</b> says whether we should
1918 * write many of them or just a few; and <b>conn_bucket</b> (if
1919 * non-negative) provides an upper limit for our answer. */
1921 connection_bucket_round_robin(int base
, int priority
,
1922 ssize_t global_bucket
, ssize_t conn_bucket
)
1925 ssize_t num_bytes_high
= (priority
? 32 : 16) * base
;
1926 ssize_t num_bytes_low
= (priority
? 4 : 2) * base
;
1928 /* Do a rudimentary round-robin so one circuit can't hog a connection.
1929 * Pick at most 32 cells, at least 4 cells if possible, and if we're in
1930 * the middle pick 1/8 of the available bandwidth. */
1931 at_most
= global_bucket
/ 8;
1932 at_most
-= (at_most
% base
); /* round down */
1933 if (at_most
> num_bytes_high
) /* 16 KB, or 8 KB for low-priority */
1934 at_most
= num_bytes_high
;
1935 else if (at_most
< num_bytes_low
) /* 2 KB, or 1 KB for low-priority */
1936 at_most
= num_bytes_low
;
1938 if (at_most
> global_bucket
)
1939 at_most
= global_bucket
;
1941 if (conn_bucket
>= 0 && at_most
> conn_bucket
)
1942 at_most
= conn_bucket
;
1949 /** How many bytes at most can we read onto this connection? */
1951 connection_bucket_read_limit(connection_t
*conn
, time_t now
)
1953 int base
= connection_speaks_cells(conn
) ?
1954 CELL_NETWORK_SIZE
: RELAY_PAYLOAD_SIZE
;
1955 int priority
= conn
->type
!= CONN_TYPE_DIR
;
1956 int conn_bucket
= -1;
1957 int global_bucket
= global_read_bucket
;
1959 if (connection_speaks_cells(conn
)) {
1960 or_connection_t
*or_conn
= TO_OR_CONN(conn
);
1961 if (conn
->state
== OR_CONN_STATE_OPEN
)
1962 conn_bucket
= or_conn
->read_bucket
;
1965 if (!connection_is_rate_limited(conn
)) {
1966 /* be willing to read on local conns even if our buckets are empty */
1967 return conn_bucket
>=0 ? conn_bucket
: 1<<14;
1970 if (connection_counts_as_relayed_traffic(conn
, now
) &&
1971 global_relayed_read_bucket
<= global_read_bucket
)
1972 global_bucket
= global_relayed_read_bucket
;
1974 return connection_bucket_round_robin(base
, priority
,
1975 global_bucket
, conn_bucket
);
1978 /** How many bytes at most can we write onto this connection? */
1980 connection_bucket_write_limit(connection_t
*conn
, time_t now
)
1982 int base
= connection_speaks_cells(conn
) ?
1983 CELL_NETWORK_SIZE
: RELAY_PAYLOAD_SIZE
;
1984 int priority
= conn
->type
!= CONN_TYPE_DIR
;
1985 int conn_bucket
= (int)conn
->outbuf_flushlen
;
1986 int global_bucket
= global_write_bucket
;
1988 if (!connection_is_rate_limited(conn
)) {
1989 /* be willing to write to local conns even if our buckets are empty */
1990 return conn
->outbuf_flushlen
;
1993 if (connection_speaks_cells(conn
)) {
1994 /* use the per-conn write limit if it's lower, but if it's less
1995 * than zero just use zero */
1996 or_connection_t
*or_conn
= TO_OR_CONN(conn
);
1997 if (conn
->state
== OR_CONN_STATE_OPEN
)
1998 if (or_conn
->write_bucket
< conn_bucket
)
1999 conn_bucket
= or_conn
->write_bucket
>= 0 ?
2000 or_conn
->write_bucket
: 0;
2003 if (connection_counts_as_relayed_traffic(conn
, now
) &&
2004 global_relayed_write_bucket
<= global_write_bucket
)
2005 global_bucket
= global_relayed_write_bucket
;
2007 return connection_bucket_round_robin(base
, priority
,
2008 global_bucket
, conn_bucket
);
2011 /** Return 1 if the global write buckets are low enough that we
2012 * shouldn't send <b>attempt</b> bytes of low-priority directory stuff
2013 * out to <b>conn</b>. Else return 0.
2015 * Priority is 1 for v1 requests (directories and running-routers),
2016 * and 2 for v2 requests (statuses and descriptors). But see FFFF in
2017 * directory_handle_command_get() for why we don't use priority 2 yet.
2019 * There are a lot of parameters we could use here:
2020 * - global_relayed_write_bucket. Low is bad.
2021 * - global_write_bucket. Low is bad.
2022 * - bandwidthrate. Low is bad.
2023 * - bandwidthburst. Not a big factor?
2024 * - attempt. High is bad.
2025 * - total bytes queued on outbufs. High is bad. But I'm wary of
2026 * using this, since a few slow-flushing queues will pump up the
2027 * number without meaning what we meant to mean. What we really
2028 * mean is "total directory bytes added to outbufs recently", but
2029 * that's harder to quantify and harder to keep track of.
2032 global_write_bucket_low(connection_t
*conn
, size_t attempt
, int priority
)
2034 int smaller_bucket
= global_write_bucket
< global_relayed_write_bucket
?
2035 global_write_bucket
: global_relayed_write_bucket
;
2036 if (authdir_mode(get_options()) && priority
>1)
2037 return 0; /* there's always room to answer v2 if we're an auth dir */
2039 if (!connection_is_rate_limited(conn
))
2040 return 0; /* local conns don't get limited */
2042 if (smaller_bucket
< (int)attempt
)
2043 return 1; /* not enough space no matter the priority */
2045 if (write_buckets_empty_last_second
)
2046 return 1; /* we're already hitting our limits, no more please */
2048 if (priority
== 1) { /* old-style v1 query */
2049 /* Could we handle *two* of these requests within the next two seconds? */
2050 or_options_t
*options
= get_options();
2051 int64_t can_write
= (int64_t)smaller_bucket
2052 + 2*(options
->RelayBandwidthRate
? options
->RelayBandwidthRate
:
2053 options
->BandwidthRate
);
2054 if (can_write
< 2*(int64_t)attempt
)
2056 } else { /* v2 query */
2057 /* no further constraints yet */
2062 /** We just read <b>num_read</b> and wrote <b>num_written</b> bytes
2063 * onto <b>conn</b>. Decrement buckets appropriately. */
2065 connection_buckets_decrement(connection_t
*conn
, time_t now
,
2066 size_t num_read
, size_t num_written
)
2068 if (!connection_is_rate_limited(conn
))
2069 return; /* local IPs are free */
2070 if (num_written
>= INT_MAX
|| num_read
>= INT_MAX
) {
2071 log_err(LD_BUG
, "Value out of range. num_read=%lu, num_written=%lu, "
2072 "connection type=%s, state=%s",
2073 (unsigned long)num_read
, (unsigned long)num_written
,
2074 conn_type_to_string(conn
->type
),
2075 conn_state_to_string(conn
->type
, conn
->state
));
2076 if (num_written
>= INT_MAX
) num_written
= 1;
2077 if (num_read
>= INT_MAX
) num_read
= 1;
2078 tor_fragile_assert();
2082 if (conn
->type
== CONN_TYPE_EXIT
)
2083 rep_hist_note_exit_bytes_read(conn
->port
, num_read
);
2084 rep_hist_note_bytes_read(num_read
, now
);
2086 if (num_written
> 0) {
2087 if (conn
->type
== CONN_TYPE_EXIT
)
2088 rep_hist_note_exit_bytes_written(conn
->port
, num_written
);
2089 rep_hist_note_bytes_written(num_written
, now
);
2092 if (connection_counts_as_relayed_traffic(conn
, now
)) {
2093 global_relayed_read_bucket
-= (int)num_read
;
2094 global_relayed_write_bucket
-= (int)num_written
;
2096 global_read_bucket
-= (int)num_read
;
2097 global_write_bucket
-= (int)num_written
;
2098 if (connection_speaks_cells(conn
) && conn
->state
== OR_CONN_STATE_OPEN
) {
2099 TO_OR_CONN(conn
)->read_bucket
-= (int)num_read
;
2100 TO_OR_CONN(conn
)->write_bucket
-= (int)num_written
;
2104 /** If we have exhausted our global buckets, or the buckets for conn,
2107 connection_consider_empty_read_buckets(connection_t
*conn
)
2111 if (global_read_bucket
<= 0) {
2112 reason
= "global read bucket exhausted. Pausing.";
2113 } else if (connection_counts_as_relayed_traffic(conn
, approx_time()) &&
2114 global_relayed_read_bucket
<= 0) {
2115 reason
= "global relayed read bucket exhausted. Pausing.";
2116 } else if (connection_speaks_cells(conn
) &&
2117 conn
->state
== OR_CONN_STATE_OPEN
&&
2118 TO_OR_CONN(conn
)->read_bucket
<= 0) {
2119 reason
= "connection read bucket exhausted. Pausing.";
2121 return; /* all good, no need to stop it */
2123 LOG_FN_CONN(conn
, (LOG_DEBUG
, LD_NET
, "%s", reason
));
2124 conn
->read_blocked_on_bw
= 1;
2125 connection_stop_reading(conn
);
2128 /** If we have exhausted our global buckets, or the buckets for conn,
2131 connection_consider_empty_write_buckets(connection_t
*conn
)
2135 if (global_write_bucket
<= 0) {
2136 reason
= "global write bucket exhausted. Pausing.";
2137 } else if (connection_counts_as_relayed_traffic(conn
, approx_time()) &&
2138 global_relayed_write_bucket
<= 0) {
2139 reason
= "global relayed write bucket exhausted. Pausing.";
2140 } else if (connection_speaks_cells(conn
) &&
2141 conn
->state
== OR_CONN_STATE_OPEN
&&
2142 TO_OR_CONN(conn
)->write_bucket
<= 0) {
2143 reason
= "connection write bucket exhausted. Pausing.";
2145 return; /* all good, no need to stop it */
2147 LOG_FN_CONN(conn
, (LOG_DEBUG
, LD_NET
, "%s", reason
));
2148 conn
->write_blocked_on_bw
= 1;
2149 connection_stop_writing(conn
);
2152 /** Initialize the global read bucket to options-\>BandwidthBurst. */
2154 connection_bucket_init(void)
2156 or_options_t
*options
= get_options();
2157 /* start it at max traffic */
2158 global_read_bucket
= (int)options
->BandwidthBurst
;
2159 global_write_bucket
= (int)options
->BandwidthBurst
;
2160 if (options
->RelayBandwidthRate
) {
2161 global_relayed_read_bucket
= (int)options
->RelayBandwidthBurst
;
2162 global_relayed_write_bucket
= (int)options
->RelayBandwidthBurst
;
2164 global_relayed_read_bucket
= (int)options
->BandwidthBurst
;
2165 global_relayed_write_bucket
= (int)options
->BandwidthBurst
;
2169 /** Refill a single <b>bucket</b> called <b>name</b> with bandwidth rate
2170 * <b>rate</b> and bandwidth burst <b>burst</b>, assuming that
2171 * <b>seconds_elapsed</b> seconds have passed since the last call.
2174 connection_bucket_refill_helper(int *bucket
, int rate
, int burst
,
2175 int seconds_elapsed
, const char *name
)
2177 int starting_bucket
= *bucket
;
2178 if (starting_bucket
< burst
&& seconds_elapsed
) {
2179 if (((burst
- starting_bucket
)/seconds_elapsed
) < rate
) {
2180 *bucket
= burst
; /* We would overflow the bucket; just set it to
2183 int incr
= rate
*seconds_elapsed
;
2185 if (*bucket
> burst
|| *bucket
< starting_bucket
) {
2186 /* If we overflow the burst, or underflow our starting bucket,
2187 * cap the bucket value to burst. */
2188 /* XXXX this might be redundant now, but it doesn't show up
2189 * in profiles. Remove it after analysis. */
2193 log(LOG_DEBUG
, LD_NET
,"%s now %d.", name
, *bucket
);
2197 /** A second has rolled over; increment buckets appropriately. */
2199 connection_bucket_refill(int seconds_elapsed
, time_t now
)
2201 or_options_t
*options
= get_options();
2202 smartlist_t
*conns
= get_connection_array();
2203 int relayrate
, relayburst
;
2205 if (options
->RelayBandwidthRate
) {
2206 relayrate
= (int)options
->RelayBandwidthRate
;
2207 relayburst
= (int)options
->RelayBandwidthBurst
;
2209 relayrate
= (int)options
->BandwidthRate
;
2210 relayburst
= (int)options
->BandwidthBurst
;
2213 tor_assert(seconds_elapsed
>= 0);
2215 write_buckets_empty_last_second
=
2216 global_relayed_write_bucket
<= 0 || global_write_bucket
<= 0;
2218 /* refill the global buckets */
2219 connection_bucket_refill_helper(&global_read_bucket
,
2220 (int)options
->BandwidthRate
,
2221 (int)options
->BandwidthBurst
,
2222 seconds_elapsed
, "global_read_bucket");
2223 connection_bucket_refill_helper(&global_write_bucket
,
2224 (int)options
->BandwidthRate
,
2225 (int)options
->BandwidthBurst
,
2226 seconds_elapsed
, "global_write_bucket");
2227 connection_bucket_refill_helper(&global_relayed_read_bucket
,
2228 relayrate
, relayburst
, seconds_elapsed
,
2229 "global_relayed_read_bucket");
2230 connection_bucket_refill_helper(&global_relayed_write_bucket
,
2231 relayrate
, relayburst
, seconds_elapsed
,
2232 "global_relayed_write_bucket");
2234 /* refill the per-connection buckets */
2235 SMARTLIST_FOREACH(conns
, connection_t
*, conn
,
2237 if (connection_speaks_cells(conn
)) {
2238 or_connection_t
*or_conn
= TO_OR_CONN(conn
);
2239 if (connection_bucket_should_increase(or_conn
->read_bucket
, or_conn
)) {
2240 connection_bucket_refill_helper(&or_conn
->read_bucket
,
2241 or_conn
->bandwidthrate
,
2242 or_conn
->bandwidthburst
,
2244 "or_conn->read_bucket");
2246 if (connection_bucket_should_increase(or_conn
->write_bucket
, or_conn
)) {
2247 connection_bucket_refill_helper(&or_conn
->write_bucket
,
2248 or_conn
->bandwidthrate
,
2249 or_conn
->bandwidthburst
,
2251 "or_conn->write_bucket");
2255 if (conn
->read_blocked_on_bw
== 1 /* marked to turn reading back on now */
2256 && global_read_bucket
> 0 /* and we're allowed to read */
2257 && (!connection_counts_as_relayed_traffic(conn
, now
) ||
2258 global_relayed_read_bucket
> 0) /* even if we're relayed traffic */
2259 && (!connection_speaks_cells(conn
) ||
2260 conn
->state
!= OR_CONN_STATE_OPEN
||
2261 TO_OR_CONN(conn
)->read_bucket
> 0)) {
2262 /* and either a non-cell conn or a cell conn with non-empty bucket */
2263 LOG_FN_CONN(conn
, (LOG_DEBUG
,LD_NET
,
2264 "waking up conn (fd %d) for read", conn
->s
));
2265 conn
->read_blocked_on_bw
= 0;
2266 connection_start_reading(conn
);
2269 if (conn
->write_blocked_on_bw
== 1
2270 && global_write_bucket
> 0 /* and we're allowed to write */
2271 && (!connection_counts_as_relayed_traffic(conn
, now
) ||
2272 global_relayed_write_bucket
> 0) /* even if it's relayed traffic */
2273 && (!connection_speaks_cells(conn
) ||
2274 conn
->state
!= OR_CONN_STATE_OPEN
||
2275 TO_OR_CONN(conn
)->write_bucket
> 0)) {
2276 LOG_FN_CONN(conn
, (LOG_DEBUG
,LD_NET
,
2277 "waking up conn (fd %d) for write", conn
->s
));
2278 conn
->write_blocked_on_bw
= 0;
2279 connection_start_writing(conn
);
2284 /** Is the <b>bucket</b> for connection <b>conn</b> low enough that we
2285 * should add another pile of tokens to it?
2288 connection_bucket_should_increase(int bucket
, or_connection_t
*conn
)
2292 if (conn
->_base
.state
!= OR_CONN_STATE_OPEN
)
2293 return 0; /* only open connections play the rate limiting game */
2294 if (bucket
>= conn
->bandwidthburst
)
2300 /** Read bytes from conn-\>s and process them.
2302 * This function gets called from conn_read() in main.c, either
2303 * when poll() has declared that conn wants to read, or (for OR conns)
2304 * when there are pending TLS bytes.
2306 * It calls connection_read_to_buf() to bring in any new bytes,
2307 * and then calls connection_process_inbuf() to process them.
2309 * Mark the connection and return -1 if you want to close it, else
2313 connection_handle_read_impl(connection_t
*conn
)
2315 int max_to_read
=-1, try_to_read
;
2316 size_t before
, n_read
= 0;
2317 int socket_error
= 0;
2319 if (conn
->marked_for_close
)
2320 return 0; /* do nothing */
2322 conn
->timestamp_lastread
= approx_time();
2324 switch (conn
->type
) {
2325 case CONN_TYPE_OR_LISTENER
:
2326 return connection_handle_listener_read(conn
, CONN_TYPE_OR
);
2327 case CONN_TYPE_AP_LISTENER
:
2328 case CONN_TYPE_AP_TRANS_LISTENER
:
2329 case CONN_TYPE_AP_NATD_LISTENER
:
2330 return connection_handle_listener_read(conn
, CONN_TYPE_AP
);
2331 case CONN_TYPE_DIR_LISTENER
:
2332 return connection_handle_listener_read(conn
, CONN_TYPE_DIR
);
2333 case CONN_TYPE_CONTROL_LISTENER
:
2334 return connection_handle_listener_read(conn
, CONN_TYPE_CONTROL
);
2335 case CONN_TYPE_AP_DNS_LISTENER
:
2336 /* This should never happen; eventdns.c handles the reads here. */
2337 tor_fragile_assert();
2342 try_to_read
= max_to_read
;
2343 tor_assert(!conn
->marked_for_close
);
2345 before
= buf_datalen(conn
->inbuf
);
2346 if (connection_read_to_buf(conn
, &max_to_read
, &socket_error
) < 0) {
2347 /* There's a read error; kill the connection.*/
2348 if (conn
->type
== CONN_TYPE_OR
&&
2349 conn
->state
== OR_CONN_STATE_CONNECTING
) {
2350 connection_or_connect_failed(TO_OR_CONN(conn
),
2351 errno_to_orconn_end_reason(socket_error
),
2352 tor_socket_strerror(socket_error
));
2354 if (CONN_IS_EDGE(conn
)) {
2355 edge_connection_t
*edge_conn
= TO_EDGE_CONN(conn
);
2356 connection_edge_end_errno(edge_conn
);
2357 if (edge_conn
->socks_request
) /* broken, don't send a socks reply back */
2358 edge_conn
->socks_request
->has_finished
= 1;
2360 connection_close_immediate(conn
); /* Don't flush; connection is dead. */
2361 connection_mark_for_close(conn
);
2364 n_read
+= buf_datalen(conn
->inbuf
) - before
;
2365 if (CONN_IS_EDGE(conn
) && try_to_read
!= max_to_read
) {
2366 /* instruct it not to try to package partial cells. */
2367 if (connection_process_inbuf(conn
, 0) < 0) {
2370 if (!conn
->marked_for_close
&&
2371 connection_is_reading(conn
) &&
2372 !conn
->inbuf_reached_eof
&&
2374 goto loop_again
; /* try reading again, in case more is here now */
2376 /* one last try, packaging partial cells and all. */
2377 if (!conn
->marked_for_close
&&
2378 connection_process_inbuf(conn
, 1) < 0) {
2381 if (conn
->linked_conn
) {
2382 /* The other side's handle_write() will never actually get called, so
2383 * we need to invoke the appropriate callbacks ourself. */
2384 connection_t
*linked
= conn
->linked_conn
;
2387 /* Probably a no-op, but hey. */
2388 connection_buckets_decrement(linked
, approx_time(), n_read
, 0);
2390 if (connection_flushed_some(linked
) < 0)
2391 connection_mark_for_close(linked
);
2392 if (!connection_wants_to_flush(linked
))
2393 connection_finished_flushing(linked
);
2396 if (!buf_datalen(linked
->outbuf
) && conn
->active_on_link
)
2397 connection_stop_reading_from_linked_conn(conn
);
2399 /* If we hit the EOF, call connection_reached_eof(). */
2400 if (!conn
->marked_for_close
&&
2401 conn
->inbuf_reached_eof
&&
2402 connection_reached_eof(conn
) < 0) {
2409 connection_handle_read(connection_t
*conn
)
2413 tor_gettimeofday_cache_clear();
2414 res
= connection_handle_read_impl(conn
);
2418 /** Pull in new bytes from conn-\>s or conn-\>linked_conn onto conn-\>inbuf,
2419 * either directly or via TLS. Reduce the token buckets by the number of bytes
2422 * If *max_to_read is -1, then decide it ourselves, else go with the
2423 * value passed to us. When returning, if it's changed, subtract the
2424 * number of bytes we read from *max_to_read.
2426 * Return -1 if we want to break conn, else return 0.
2429 connection_read_to_buf(connection_t
*conn
, int *max_to_read
, int *socket_error
)
2432 ssize_t at_most
= *max_to_read
;
2433 size_t slack_in_buf
, more_to_read
;
2434 size_t n_read
= 0, n_written
= 0;
2436 if (at_most
== -1) { /* we need to initialize it */
2437 /* how many bytes are we allowed to read? */
2438 at_most
= connection_bucket_read_limit(conn
, approx_time());
2441 slack_in_buf
= buf_slack(conn
->inbuf
);
2443 if ((size_t)at_most
> slack_in_buf
&& slack_in_buf
>= 1024) {
2444 more_to_read
= at_most
- slack_in_buf
;
2445 at_most
= slack_in_buf
;
2450 if (connection_speaks_cells(conn
) &&
2451 conn
->state
> OR_CONN_STATE_PROXY_HANDSHAKING
) {
2453 or_connection_t
*or_conn
= TO_OR_CONN(conn
);
2454 size_t initial_size
;
2455 if (conn
->state
== OR_CONN_STATE_TLS_HANDSHAKING
||
2456 conn
->state
== OR_CONN_STATE_TLS_CLIENT_RENEGOTIATING
) {
2457 /* continue handshaking even if global token bucket is empty */
2458 return connection_tls_continue_handshake(or_conn
);
2462 "%d: starting, inbuf_datalen %ld (%d pending in tls object)."
2464 conn
->s
,(long)buf_datalen(conn
->inbuf
),
2465 tor_tls_get_pending_bytes(or_conn
->tls
), (long)at_most
);
2467 initial_size
= buf_datalen(conn
->inbuf
);
2468 /* else open, or closing */
2469 result
= read_to_buf_tls(or_conn
->tls
, at_most
, conn
->inbuf
);
2470 if (TOR_TLS_IS_ERROR(result
) || result
== TOR_TLS_CLOSE
)
2471 or_conn
->tls_error
= result
;
2473 or_conn
->tls_error
= 0;
2477 case TOR_TLS_ERROR_IO
:
2478 log_debug(LD_NET
,"TLS connection closed %son read. Closing. "
2479 "(Nickname %s, address %s)",
2480 result
== TOR_TLS_CLOSE
? "cleanly " : "",
2481 or_conn
->nickname
? or_conn
->nickname
: "not set",
2484 CASE_TOR_TLS_ERROR_ANY_NONIO
:
2485 log_debug(LD_NET
,"tls error [%s]. breaking (nickname %s, address %s).",
2486 tor_tls_err_to_string(result
),
2487 or_conn
->nickname
? or_conn
->nickname
: "not set",
2490 case TOR_TLS_WANTWRITE
:
2491 connection_start_writing(conn
);
2493 case TOR_TLS_WANTREAD
: /* we're already reading */
2494 case TOR_TLS_DONE
: /* no data read, so nothing to process */
2496 break; /* so we call bucket_decrement below */
2500 pending
= tor_tls_get_pending_bytes(or_conn
->tls
);
2502 /* If we have any pending bytes, we read them now. This *can*
2503 * take us over our read allotment, but really we shouldn't be
2504 * believing that SSL bytes are the same as TCP bytes anyway. */
2505 int r2
= read_to_buf_tls(or_conn
->tls
, pending
, conn
->inbuf
);
2507 log_warn(LD_BUG
, "apparently, reading pending bytes can fail.");
2511 result
= (int)(buf_datalen(conn
->inbuf
)-initial_size
);
2512 tor_tls_get_n_raw_bytes(or_conn
->tls
, &n_read
, &n_written
);
2513 log_debug(LD_GENERAL
, "After TLS read of %d: %ld read, %ld written",
2514 result
, (long)n_read
, (long)n_written
);
2515 } else if (conn
->linked
) {
2516 if (conn
->linked_conn
) {
2517 result
= move_buf_to_buf(conn
->inbuf
, conn
->linked_conn
->outbuf
,
2518 &conn
->linked_conn
->outbuf_flushlen
);
2522 //log_notice(LD_GENERAL, "Moved %d bytes on an internal link!", result);
2523 /* If the other side has disappeared, or if it's been marked for close and
2524 * we flushed its outbuf, then we should set our inbuf_reached_eof. */
2525 if (!conn
->linked_conn
||
2526 (conn
->linked_conn
->marked_for_close
&&
2527 buf_datalen(conn
->linked_conn
->outbuf
) == 0))
2528 conn
->inbuf_reached_eof
= 1;
2530 n_read
= (size_t) result
;
2532 /* !connection_speaks_cells, !conn->linked_conn. */
2533 int reached_eof
= 0;
2534 CONN_LOG_PROTECT(conn
,
2535 result
= read_to_buf(conn
->s
, at_most
, conn
->inbuf
, &reached_eof
,
2538 conn
->inbuf_reached_eof
= 1;
2540 // log_fn(LOG_DEBUG,"read_to_buf returned %d.",read_result);
2544 n_read
= (size_t) result
;
2547 if (n_read
> 0) { /* change *max_to_read */
2548 /*XXXX021 check for overflow*/
2549 *max_to_read
= (int)(at_most
- n_read
);
2552 if (conn
->type
== CONN_TYPE_AP
) {
2553 edge_connection_t
*edge_conn
= TO_EDGE_CONN(conn
);
2554 /*XXXX021 check for overflow*/
2555 edge_conn
->n_read
+= (int)n_read
;
2558 connection_buckets_decrement(conn
, approx_time(), n_read
, n_written
);
2560 if (more_to_read
&& result
== at_most
) {
2561 slack_in_buf
= buf_slack(conn
->inbuf
);
2562 at_most
= more_to_read
;
2566 /* Call even if result is 0, since the global read bucket may
2567 * have reached 0 on a different conn, and this guy needs to
2568 * know to stop reading. */
2569 connection_consider_empty_read_buckets(conn
);
2570 if (n_written
> 0 && connection_is_writing(conn
))
2571 connection_consider_empty_write_buckets(conn
);
2576 /** A pass-through to fetch_from_buf. */
2578 connection_fetch_from_buf(char *string
, size_t len
, connection_t
*conn
)
2580 return fetch_from_buf(string
, len
, conn
->inbuf
);
2583 /** Return conn-\>outbuf_flushlen: how many bytes conn wants to flush
2584 * from its outbuf. */
2586 connection_wants_to_flush(connection_t
*conn
)
2588 return conn
->outbuf_flushlen
> 0;
2591 /** Are there too many bytes on edge connection <b>conn</b>'s outbuf to
2592 * send back a relay-level sendme yet? Return 1 if so, 0 if not. Used by
2593 * connection_edge_consider_sending_sendme().
2596 connection_outbuf_too_full(connection_t
*conn
)
2598 return (conn
->outbuf_flushlen
> 10*CELL_PAYLOAD_SIZE
);
2601 /** Try to flush more bytes onto conn-\>s.
2603 * This function gets called either from conn_write() in main.c
2604 * when poll() has declared that conn wants to write, or below
2605 * from connection_write_to_buf() when an entire TLS record is ready.
2607 * Update conn-\>timestamp_lastwritten to now, and call flush_buf
2608 * or flush_buf_tls appropriately. If it succeeds and there are no more
2609 * more bytes on conn->outbuf, then call connection_finished_flushing
2612 * If <b>force</b>, then write as many bytes as possible, ignoring bandwidth
2613 * limits. (Used for flushing messages to controller connections on fatal
2616 * Mark the connection and return -1 if you want to close it, else
2620 connection_handle_write_impl(connection_t
*conn
, int force
)
2623 socklen_t len
=(socklen_t
)sizeof(e
);
2625 ssize_t max_to_write
;
2626 time_t now
= approx_time();
2627 size_t n_read
= 0, n_written
= 0;
2629 tor_assert(!connection_is_listener(conn
));
2631 if (conn
->marked_for_close
|| conn
->s
< 0)
2632 return 0; /* do nothing */
2634 if (conn
->in_flushed_some
) {
2635 log_warn(LD_BUG
, "called recursively from inside conn->in_flushed_some");
2639 conn
->timestamp_lastwritten
= now
;
2641 /* Sometimes, "writable" means "connected". */
2642 if (connection_state_is_connecting(conn
)) {
2643 if (getsockopt(conn
->s
, SOL_SOCKET
, SO_ERROR
, (void*)&e
, &len
) < 0) {
2645 "getsockopt() syscall failed?! Please report to tor-ops.");
2646 if (CONN_IS_EDGE(conn
))
2647 connection_edge_end_errno(TO_EDGE_CONN(conn
));
2648 connection_mark_for_close(conn
);
2652 /* some sort of error, but maybe just inprogress still */
2653 if (!ERRNO_IS_CONN_EINPROGRESS(e
)) {
2654 log_info(LD_NET
,"in-progress connect failed. Removing. (%s)",
2655 tor_socket_strerror(e
));
2656 if (CONN_IS_EDGE(conn
))
2657 connection_edge_end_errno(TO_EDGE_CONN(conn
));
2658 if (conn
->type
== CONN_TYPE_OR
)
2659 connection_or_connect_failed(TO_OR_CONN(conn
),
2660 errno_to_orconn_end_reason(e
),
2661 tor_socket_strerror(e
));
2663 connection_close_immediate(conn
);
2664 connection_mark_for_close(conn
);
2667 return 0; /* no change, see if next time is better */
2670 /* The connection is successful. */
2671 if (connection_finished_connecting(conn
)<0)
2675 max_to_write
= force
? (ssize_t
)conn
->outbuf_flushlen
2676 : connection_bucket_write_limit(conn
, now
);
2678 if (connection_speaks_cells(conn
) &&
2679 conn
->state
> OR_CONN_STATE_PROXY_HANDSHAKING
) {
2680 or_connection_t
*or_conn
= TO_OR_CONN(conn
);
2681 if (conn
->state
== OR_CONN_STATE_TLS_HANDSHAKING
||
2682 conn
->state
== OR_CONN_STATE_TLS_CLIENT_RENEGOTIATING
) {
2683 connection_stop_writing(conn
);
2684 if (connection_tls_continue_handshake(or_conn
) < 0) {
2685 /* Don't flush; connection is dead. */
2686 connection_close_immediate(conn
);
2687 connection_mark_for_close(conn
);
2691 } else if (conn
->state
== OR_CONN_STATE_TLS_SERVER_RENEGOTIATING
) {
2692 return connection_handle_read(conn
);
2695 /* else open, or closing */
2696 result
= flush_buf_tls(or_conn
->tls
, conn
->outbuf
,
2697 max_to_write
, &conn
->outbuf_flushlen
);
2699 /* If we just flushed the last bytes, check if this tunneled dir
2700 * request is done. */
2701 if (buf_datalen(conn
->outbuf
) == 0 && conn
->dirreq_id
)
2702 geoip_change_dirreq_state(conn
->dirreq_id
, DIRREQ_TUNNELED
,
2703 DIRREQ_OR_CONN_BUFFER_FLUSHED
);
2706 CASE_TOR_TLS_ERROR_ANY
:
2708 log_info(LD_NET
,result
!=TOR_TLS_CLOSE
?
2709 "tls error. breaking.":"TLS connection closed on flush");
2710 /* Don't flush; connection is dead. */
2711 connection_close_immediate(conn
);
2712 connection_mark_for_close(conn
);
2714 case TOR_TLS_WANTWRITE
:
2715 log_debug(LD_NET
,"wanted write.");
2716 /* we're already writing */
2718 case TOR_TLS_WANTREAD
:
2719 /* Make sure to avoid a loop if the receive buckets are empty. */
2720 log_debug(LD_NET
,"wanted read.");
2721 if (!connection_is_reading(conn
)) {
2722 connection_stop_writing(conn
);
2723 conn
->write_blocked_on_bw
= 1;
2724 /* we'll start reading again when we get more tokens in our
2725 * read bucket; then we'll start writing again too.
2728 /* else no problem, we're already reading */
2730 /* case TOR_TLS_DONE:
2731 * for TOR_TLS_DONE, fall through to check if the flushlen
2732 * is empty, so we can stop writing.
2736 tor_tls_get_n_raw_bytes(or_conn
->tls
, &n_read
, &n_written
);
2737 log_debug(LD_GENERAL
, "After TLS write of %d: %ld read, %ld written",
2738 result
, (long)n_read
, (long)n_written
);
2740 CONN_LOG_PROTECT(conn
,
2741 result
= flush_buf(conn
->s
, conn
->outbuf
,
2742 max_to_write
, &conn
->outbuf_flushlen
));
2744 if (CONN_IS_EDGE(conn
))
2745 connection_edge_end_errno(TO_EDGE_CONN(conn
));
2747 connection_close_immediate(conn
); /* Don't flush; connection is dead. */
2748 connection_mark_for_close(conn
);
2751 n_written
= (size_t) result
;
2754 if (conn
->type
== CONN_TYPE_AP
) {
2755 edge_connection_t
*edge_conn
= TO_EDGE_CONN(conn
);
2756 /*XXXX021 check for overflow.*/
2757 edge_conn
->n_written
+= (int)n_written
;
2760 connection_buckets_decrement(conn
, approx_time(), n_read
, n_written
);
2763 /* If we wrote any bytes from our buffer, then call the appropriate
2765 if (connection_flushed_some(conn
) < 0)
2766 connection_mark_for_close(conn
);
2769 if (!connection_wants_to_flush(conn
)) { /* it's done flushing */
2770 if (connection_finished_flushing(conn
) < 0) {
2771 /* already marked */
2777 /* Call even if result is 0, since the global write bucket may
2778 * have reached 0 on a different conn, and this guy needs to
2779 * know to stop writing. */
2780 connection_consider_empty_write_buckets(conn
);
2781 if (n_read
> 0 && connection_is_reading(conn
))
2782 connection_consider_empty_read_buckets(conn
);
2788 connection_handle_write(connection_t
*conn
, int force
)
2791 tor_gettimeofday_cache_clear();
2792 res
= connection_handle_write_impl(conn
, force
);
2796 /** OpenSSL TLS record size is 16383; this is close. The goal here is to
2797 * push data out as soon as we know there's enough for a TLS record, so
2798 * during periods of high load we won't read entire megabytes from
2799 * input before pushing any data out. It also has the feature of not
2800 * growing huge outbufs unless something is slow. */
2801 #define MIN_TLS_FLUSHLEN 15872
2803 /** Append <b>len</b> bytes of <b>string</b> onto <b>conn</b>'s
2804 * outbuf, and ask it to start writing.
2806 * If <b>zlib</b> is nonzero, this is a directory connection that should get
2807 * its contents compressed or decompressed as they're written. If zlib is
2808 * negative, this is the last data to be compressed, and the connection's zlib
2809 * state should be flushed.
2811 * If it's an OR conn and an entire TLS record is ready, then try to
2812 * flush the record now. Similarly, if it's a local control connection
2813 * and a 64k chunk is ready, try to flush it all, so we don't end up with
2814 * many megabytes of controller info queued at once.
2817 _connection_write_to_buf_impl(const char *string
, size_t len
,
2818 connection_t
*conn
, int zlib
)
2820 /* XXXX This function really needs to return -1 on failure. */
2823 if (!len
&& !(zlib
<0))
2825 /* if it's marked for close, only allow write if we mean to flush it */
2826 if (conn
->marked_for_close
&& !conn
->hold_open_until_flushed
)
2829 old_datalen
= buf_datalen(conn
->outbuf
);
2831 dir_connection_t
*dir_conn
= TO_DIR_CONN(conn
);
2832 int done
= zlib
< 0;
2833 CONN_LOG_PROTECT(conn
, r
= write_to_buf_zlib(conn
->outbuf
,
2834 dir_conn
->zlib_state
,
2835 string
, len
, done
));
2837 CONN_LOG_PROTECT(conn
, r
= write_to_buf(string
, len
, conn
->outbuf
));
2840 if (CONN_IS_EDGE(conn
)) {
2841 /* if it failed, it means we have our package/delivery windows set
2842 wrong compared to our max outbuf size. close the whole circuit. */
2844 "write_to_buf failed. Closing circuit (fd %d).", conn
->s
);
2845 circuit_mark_for_close(circuit_get_by_edge_conn(TO_EDGE_CONN(conn
)),
2846 END_CIRC_REASON_INTERNAL
);
2849 "write_to_buf failed. Closing connection (fd %d).", conn
->s
);
2850 connection_mark_for_close(conn
);
2855 connection_start_writing(conn
);
2857 conn
->outbuf_flushlen
+= buf_datalen(conn
->outbuf
) - old_datalen
;
2860 conn
->outbuf_flushlen
+= len
;
2862 /* Should we try flushing the outbuf now? */
2863 if (conn
->in_flushed_some
) {
2864 /* Don't flush the outbuf when the reason we're writing more stuff is
2865 * _because_ we flushed the outbuf. That's unfair. */
2869 if (conn
->type
== CONN_TYPE_OR
&&
2870 conn
->outbuf_flushlen
-len
< MIN_TLS_FLUSHLEN
&&
2871 conn
->outbuf_flushlen
>= MIN_TLS_FLUSHLEN
) {
2872 /* We just pushed outbuf_flushlen to MIN_TLS_FLUSHLEN or above;
2873 * we can send out a full TLS frame now if we like. */
2874 extra
= conn
->outbuf_flushlen
- MIN_TLS_FLUSHLEN
;
2875 conn
->outbuf_flushlen
= MIN_TLS_FLUSHLEN
;
2876 } else if (conn
->type
== CONN_TYPE_CONTROL
&&
2877 !connection_is_rate_limited(conn
) &&
2878 conn
->outbuf_flushlen
-len
< 1<<16 &&
2879 conn
->outbuf_flushlen
>= 1<<16) {
2880 /* just try to flush all of it */
2882 return; /* no need to try flushing */
2884 if (connection_handle_write(conn
, 0) < 0) {
2885 if (!conn
->marked_for_close
) {
2886 /* this connection is broken. remove it. */
2887 log_warn(LD_BUG
, "unhandled error on write for "
2888 "conn (type %d, fd %d); removing",
2889 conn
->type
, conn
->s
);
2890 tor_fragile_assert();
2891 /* do a close-immediate here, so we don't try to flush */
2892 connection_close_immediate(conn
);
2897 conn
->outbuf_flushlen
+= extra
;
2898 connection_start_writing(conn
);
2903 /** Return a connection with given type, address, port, and purpose;
2904 * or NULL if no such connection exists. */
2906 connection_get_by_type_addr_port_purpose(int type
,
2907 const tor_addr_t
*addr
, uint16_t port
,
2910 smartlist_t
*conns
= get_connection_array();
2911 SMARTLIST_FOREACH(conns
, connection_t
*, conn
,
2913 if (conn
->type
== type
&&
2914 tor_addr_eq(&conn
->addr
, addr
) &&
2915 conn
->port
== port
&&
2916 conn
->purpose
== purpose
&&
2917 !conn
->marked_for_close
)
2923 /** Return the stream with id <b>id</b> if it is not already marked for
2927 connection_get_by_global_id(uint64_t id
)
2929 smartlist_t
*conns
= get_connection_array();
2930 SMARTLIST_FOREACH(conns
, connection_t
*, conn
,
2932 if (conn
->global_identifier
== id
)
2938 /** Return a connection of type <b>type</b> that is not marked for close.
2941 connection_get_by_type(int type
)
2943 smartlist_t
*conns
= get_connection_array();
2944 SMARTLIST_FOREACH(conns
, connection_t
*, conn
,
2946 if (conn
->type
== type
&& !conn
->marked_for_close
)
2952 /** Return a connection of type <b>type</b> that is in state <b>state</b>,
2953 * and that is not marked for close.
2956 connection_get_by_type_state(int type
, int state
)
2958 smartlist_t
*conns
= get_connection_array();
2959 SMARTLIST_FOREACH(conns
, connection_t
*, conn
,
2961 if (conn
->type
== type
&& conn
->state
== state
&& !conn
->marked_for_close
)
2967 /** Return a connection of type <b>type</b> that has rendquery equal
2968 * to <b>rendquery</b>, and that is not marked for close. If state
2969 * is non-zero, conn must be of that state too.
2972 connection_get_by_type_state_rendquery(int type
, int state
,
2973 const char *rendquery
)
2975 smartlist_t
*conns
= get_connection_array();
2977 tor_assert(type
== CONN_TYPE_DIR
||
2978 type
== CONN_TYPE_AP
|| type
== CONN_TYPE_EXIT
);
2979 tor_assert(rendquery
);
2981 SMARTLIST_FOREACH(conns
, connection_t
*, conn
,
2983 if (conn
->type
== type
&&
2984 !conn
->marked_for_close
&&
2985 (!state
|| state
== conn
->state
)) {
2986 if (type
== CONN_TYPE_DIR
&&
2987 TO_DIR_CONN(conn
)->rend_data
&&
2988 !rend_cmp_service_ids(rendquery
,
2989 TO_DIR_CONN(conn
)->rend_data
->onion_address
))
2991 else if (CONN_IS_EDGE(conn
) &&
2992 TO_EDGE_CONN(conn
)->rend_data
&&
2993 !rend_cmp_service_ids(rendquery
,
2994 TO_EDGE_CONN(conn
)->rend_data
->onion_address
))
3001 /** Return an open, non-marked connection of a given type and purpose, or NULL
3002 * if no such connection exists. */
3004 connection_get_by_type_purpose(int type
, int purpose
)
3006 smartlist_t
*conns
= get_connection_array();
3007 SMARTLIST_FOREACH(conns
, connection_t
*, conn
,
3009 if (conn
->type
== type
&&
3010 !conn
->marked_for_close
&&
3011 (purpose
== conn
->purpose
))
3017 /** Return 1 if <b>conn</b> is a listener conn, else return 0. */
3019 connection_is_listener(connection_t
*conn
)
3021 if (conn
->type
== CONN_TYPE_OR_LISTENER
||
3022 conn
->type
== CONN_TYPE_AP_LISTENER
||
3023 conn
->type
== CONN_TYPE_AP_TRANS_LISTENER
||
3024 conn
->type
== CONN_TYPE_AP_DNS_LISTENER
||
3025 conn
->type
== CONN_TYPE_AP_NATD_LISTENER
||
3026 conn
->type
== CONN_TYPE_DIR_LISTENER
||
3027 conn
->type
== CONN_TYPE_CONTROL_LISTENER
)
3032 /** Return 1 if <b>conn</b> is in state "open" and is not marked
3033 * for close, else return 0.
3036 connection_state_is_open(connection_t
*conn
)
3040 if (conn
->marked_for_close
)
3043 if ((conn
->type
== CONN_TYPE_OR
&& conn
->state
== OR_CONN_STATE_OPEN
) ||
3044 (conn
->type
== CONN_TYPE_AP
&& conn
->state
== AP_CONN_STATE_OPEN
) ||
3045 (conn
->type
== CONN_TYPE_EXIT
&& conn
->state
== EXIT_CONN_STATE_OPEN
) ||
3046 (conn
->type
== CONN_TYPE_CONTROL
&&
3047 conn
->state
== CONTROL_CONN_STATE_OPEN
))
3053 /** Return 1 if conn is in 'connecting' state, else return 0. */
3055 connection_state_is_connecting(connection_t
*conn
)
3059 if (conn
->marked_for_close
)
3064 return conn
->state
== OR_CONN_STATE_CONNECTING
;
3065 case CONN_TYPE_EXIT
:
3066 return conn
->state
== EXIT_CONN_STATE_CONNECTING
;
3068 return conn
->state
== DIR_CONN_STATE_CONNECTING
;
3074 /** Allocates a base64'ed authenticator for use in http or https
3075 * auth, based on the input string <b>authenticator</b>. Returns it
3076 * if success, else returns NULL. */
3078 alloc_http_authenticator(const char *authenticator
)
3080 /* an authenticator in Basic authentication
3081 * is just the string "username:password" */
3082 const size_t authenticator_length
= strlen(authenticator
);
3083 /* The base64_encode function needs a minimum buffer length
3085 const size_t base64_authenticator_length
= (authenticator_length
/48+1)*66;
3086 char *base64_authenticator
= tor_malloc(base64_authenticator_length
);
3087 if (base64_encode(base64_authenticator
, base64_authenticator_length
,
3088 authenticator
, authenticator_length
) < 0) {
3089 tor_free(base64_authenticator
); /* free and set to null */
3091 /* remove extra \n at end of encoding */
3092 base64_authenticator
[strlen(base64_authenticator
) - 1] = 0;
3094 return base64_authenticator
;
3097 /** Given a socket handle, check whether the local address (sockname) of the
3098 * socket is one that we've connected from before. If so, double-check
3099 * whether our address has changed and we need to generate keys. If we do,
3103 client_check_address_changed(int sock
)
3105 uint32_t iface_ip
, ip_out
; /* host order */
3106 struct sockaddr_in out_addr
;
3107 socklen_t out_addr_len
= (socklen_t
) sizeof(out_addr
);
3108 uint32_t *ip
; /* host order */
3110 if (!last_interface_ip
)
3111 get_interface_address(LOG_INFO
, &last_interface_ip
);
3112 if (!outgoing_addrs
)
3113 outgoing_addrs
= smartlist_create();
3115 if (getsockname(sock
, (struct sockaddr
*)&out_addr
, &out_addr_len
)<0) {
3116 int e
= tor_socket_errno(sock
);
3117 log_warn(LD_NET
, "getsockname() to check for address change failed: %s",
3118 tor_socket_strerror(e
));
3122 /* If we've used this address previously, we're okay. */
3123 ip_out
= ntohl(out_addr
.sin_addr
.s_addr
);
3124 SMARTLIST_FOREACH(outgoing_addrs
, uint32_t*, ip_ptr
,
3125 if (*ip_ptr
== ip_out
) return;
3128 /* Uh-oh. We haven't connected from this address before. Has the interface
3129 * address changed? */
3130 if (get_interface_address(LOG_INFO
, &iface_ip
)<0)
3132 ip
= tor_malloc(sizeof(uint32_t));
3135 if (iface_ip
== last_interface_ip
) {
3136 /* Nope, it hasn't changed. Add this address to the list. */
3137 smartlist_add(outgoing_addrs
, ip
);
3139 /* The interface changed. We're a client, so we need to regenerate our
3140 * keys. First, reset the state. */
3141 log(LOG_NOTICE
, LD_NET
, "Our IP address has changed. Rotating keys...");
3142 last_interface_ip
= iface_ip
;
3143 SMARTLIST_FOREACH(outgoing_addrs
, void*, ip_ptr
, tor_free(ip_ptr
));
3144 smartlist_clear(outgoing_addrs
);
3145 smartlist_add(outgoing_addrs
, ip
);
3146 /* Okay, now change our keys. */
3147 ip_address_changed(1);
3151 /** Some systems have limited system buffers for recv and xmit on
3152 * sockets allocated in a virtual server or similar environment. For a Tor
3153 * server this can produce the "Error creating network socket: No buffer
3154 * space available" error once all available TCP buffer space is consumed.
3155 * This method will attempt to constrain the buffers allocated for the socket
3156 * to the desired size to stay below system TCP buffer limits.
3159 set_constrained_socket_buffers(int sock
, int size
)
3161 void *sz
= (void*)&size
;
3162 socklen_t sz_sz
= (socklen_t
) sizeof(size
);
3163 if (setsockopt(sock
, SOL_SOCKET
, SO_SNDBUF
, sz
, sz_sz
) < 0) {
3164 int e
= tor_socket_errno(sock
);
3165 log_warn(LD_NET
, "setsockopt() to constrain send "
3166 "buffer to %d bytes failed: %s", size
, tor_socket_strerror(e
));
3168 if (setsockopt(sock
, SOL_SOCKET
, SO_RCVBUF
, sz
, sz_sz
) < 0) {
3169 int e
= tor_socket_errno(sock
);
3170 log_warn(LD_NET
, "setsockopt() to constrain recv "
3171 "buffer to %d bytes failed: %s", size
, tor_socket_strerror(e
));
3175 /** Process new bytes that have arrived on conn-\>inbuf.
3177 * This function just passes conn to the connection-specific
3178 * connection_*_process_inbuf() function. It also passes in
3179 * package_partial if wanted.
3182 connection_process_inbuf(connection_t
*conn
, int package_partial
)
3186 switch (conn
->type
) {
3188 return connection_or_process_inbuf(TO_OR_CONN(conn
));
3189 case CONN_TYPE_EXIT
:
3191 return connection_edge_process_inbuf(TO_EDGE_CONN(conn
),
3194 return connection_dir_process_inbuf(TO_DIR_CONN(conn
));
3195 case CONN_TYPE_CPUWORKER
:
3196 return connection_cpu_process_inbuf(conn
);
3197 case CONN_TYPE_CONTROL
:
3198 return connection_control_process_inbuf(TO_CONTROL_CONN(conn
));
3200 log_err(LD_BUG
,"got unexpected conn type %d.", conn
->type
);
3201 tor_fragile_assert();
3206 /** Called whenever we've written data on a connection. */
3208 connection_flushed_some(connection_t
*conn
)
3211 tor_assert(!conn
->in_flushed_some
);
3212 conn
->in_flushed_some
= 1;
3213 if (conn
->type
== CONN_TYPE_DIR
&&
3214 conn
->state
== DIR_CONN_STATE_SERVER_WRITING
) {
3215 r
= connection_dirserv_flushed_some(TO_DIR_CONN(conn
));
3216 } else if (conn
->type
== CONN_TYPE_OR
) {
3217 r
= connection_or_flushed_some(TO_OR_CONN(conn
));
3219 conn
->in_flushed_some
= 0;
3223 /** We just finished flushing bytes from conn-\>outbuf, and there
3224 * are no more bytes remaining.
3226 * This function just passes conn to the connection-specific
3227 * connection_*_finished_flushing() function.
3230 connection_finished_flushing(connection_t
*conn
)
3234 /* If the connection is closed, don't try to do anything more here. */
3235 if (CONN_IS_CLOSED(conn
))
3238 // log_fn(LOG_DEBUG,"entered. Socket %u.", conn->s);
3240 switch (conn
->type
) {
3242 return connection_or_finished_flushing(TO_OR_CONN(conn
));
3244 case CONN_TYPE_EXIT
:
3245 return connection_edge_finished_flushing(TO_EDGE_CONN(conn
));
3247 return connection_dir_finished_flushing(TO_DIR_CONN(conn
));
3248 case CONN_TYPE_CPUWORKER
:
3249 return connection_cpu_finished_flushing(conn
);
3250 case CONN_TYPE_CONTROL
:
3251 return connection_control_finished_flushing(TO_CONTROL_CONN(conn
));
3253 log_err(LD_BUG
,"got unexpected conn type %d.", conn
->type
);
3254 tor_fragile_assert();
3259 /** Called when our attempt to connect() to another server has just
3262 * This function just passes conn to the connection-specific
3263 * connection_*_finished_connecting() function.
3266 connection_finished_connecting(connection_t
*conn
)
3272 return connection_or_finished_connecting(TO_OR_CONN(conn
));
3273 case CONN_TYPE_EXIT
:
3274 return connection_edge_finished_connecting(TO_EDGE_CONN(conn
));
3276 return connection_dir_finished_connecting(TO_DIR_CONN(conn
));
3278 log_err(LD_BUG
,"got unexpected conn type %d.", conn
->type
);
3279 tor_fragile_assert();
3284 /** Callback: invoked when a connection reaches an EOF event. */
3286 connection_reached_eof(connection_t
*conn
)
3288 switch (conn
->type
) {
3290 return connection_or_reached_eof(TO_OR_CONN(conn
));
3292 case CONN_TYPE_EXIT
:
3293 return connection_edge_reached_eof(TO_EDGE_CONN(conn
));
3295 return connection_dir_reached_eof(TO_DIR_CONN(conn
));
3296 case CONN_TYPE_CPUWORKER
:
3297 return connection_cpu_reached_eof(conn
);
3298 case CONN_TYPE_CONTROL
:
3299 return connection_control_reached_eof(TO_CONTROL_CONN(conn
));
3301 log_err(LD_BUG
,"got unexpected conn type %d.", conn
->type
);
3302 tor_fragile_assert();
3307 /** Log how many bytes are used by buffers of different kinds and sizes. */
3309 connection_dump_buffer_mem_stats(int severity
)
3311 uint64_t used_by_type
[_CONN_TYPE_MAX
+1];
3312 uint64_t alloc_by_type
[_CONN_TYPE_MAX
+1];
3313 int n_conns_by_type
[_CONN_TYPE_MAX
+1];
3314 uint64_t total_alloc
= 0;
3315 uint64_t total_used
= 0;
3317 smartlist_t
*conns
= get_connection_array();
3319 memset(used_by_type
, 0, sizeof(used_by_type
));
3320 memset(alloc_by_type
, 0, sizeof(alloc_by_type
));
3321 memset(n_conns_by_type
, 0, sizeof(n_conns_by_type
));
3323 SMARTLIST_FOREACH(conns
, connection_t
*, c
,
3326 ++n_conns_by_type
[tp
];
3328 used_by_type
[tp
] += buf_datalen(c
->inbuf
);
3329 alloc_by_type
[tp
] += buf_allocation(c
->inbuf
);
3332 used_by_type
[tp
] += buf_datalen(c
->outbuf
);
3333 alloc_by_type
[tp
] += buf_allocation(c
->outbuf
);
3336 for (i
=0; i
<= _CONN_TYPE_MAX
; ++i
) {
3337 total_used
+= used_by_type
[i
];
3338 total_alloc
+= alloc_by_type
[i
];
3341 log(severity
, LD_GENERAL
,
3342 "In buffers for %d connections: "U64_FORMAT
" used/"U64_FORMAT
" allocated",
3343 smartlist_len(conns
),
3344 U64_PRINTF_ARG(total_used
), U64_PRINTF_ARG(total_alloc
));
3345 for (i
=_CONN_TYPE_MIN
; i
<= _CONN_TYPE_MAX
; ++i
) {
3346 if (!n_conns_by_type
[i
])
3348 log(severity
, LD_GENERAL
,
3349 " For %d %s connections: "U64_FORMAT
" used/"U64_FORMAT
" allocated",
3350 n_conns_by_type
[i
], conn_type_to_string(i
),
3351 U64_PRINTF_ARG(used_by_type
[i
]), U64_PRINTF_ARG(alloc_by_type
[i
]));
3355 /** Verify that connection <b>conn</b> has all of its invariants
3356 * correct. Trigger an assert if anything is invalid.
3359 assert_connection_ok(connection_t
*conn
, time_t now
)
3361 (void) now
; /* XXXX unused. */
3363 tor_assert(conn
->type
>= _CONN_TYPE_MIN
);
3364 tor_assert(conn
->type
<= _CONN_TYPE_MAX
);
3365 switch (conn
->type
) {
3367 tor_assert(conn
->magic
== OR_CONNECTION_MAGIC
);
3370 case CONN_TYPE_EXIT
:
3371 tor_assert(conn
->magic
== EDGE_CONNECTION_MAGIC
);
3374 tor_assert(conn
->magic
== DIR_CONNECTION_MAGIC
);
3376 case CONN_TYPE_CONTROL
:
3377 tor_assert(conn
->magic
== CONTROL_CONNECTION_MAGIC
);
3380 tor_assert(conn
->magic
== BASE_CONNECTION_MAGIC
);
3384 if (conn
->linked_conn
) {
3385 tor_assert(conn
->linked_conn
->linked_conn
== conn
);
3386 tor_assert(conn
->linked
);
3389 tor_assert(conn
->s
< 0);
3391 if (conn
->outbuf_flushlen
> 0) {
3392 tor_assert(connection_is_writing(conn
) || conn
->write_blocked_on_bw
||
3393 (CONN_IS_EDGE(conn
) && TO_EDGE_CONN(conn
)->edge_blocked_on_circ
));
3396 if (conn
->hold_open_until_flushed
)
3397 tor_assert(conn
->marked_for_close
);
3399 /* XXXX check: read_blocked_on_bw, write_blocked_on_bw, s, conn_array_index,
3400 * marked_for_close. */
3403 if (!connection_is_listener(conn
)) {
3404 assert_buf_ok(conn
->inbuf
);
3405 assert_buf_ok(conn
->outbuf
);
3408 if (conn
->type
== CONN_TYPE_OR
) {
3409 or_connection_t
*or_conn
= TO_OR_CONN(conn
);
3410 if (conn
->state
== OR_CONN_STATE_OPEN
) {
3411 /* tor_assert(conn->bandwidth > 0); */
3412 /* the above isn't necessarily true: if we just did a TLS
3413 * handshake but we didn't recognize the other peer, or it
3414 * gave a bad cert/etc, then we won't have assigned bandwidth,
3415 * yet it will be open. -RD
3417 // tor_assert(conn->read_bucket >= 0);
3419 // tor_assert(conn->addr && conn->port);
3420 tor_assert(conn
->address
);
3421 if (conn
->state
> OR_CONN_STATE_PROXY_HANDSHAKING
)
3422 tor_assert(or_conn
->tls
);
3425 if (CONN_IS_EDGE(conn
)) {
3426 edge_connection_t
*edge_conn
= TO_EDGE_CONN(conn
);
3427 if (edge_conn
->chosen_exit_optional
|| edge_conn
->chosen_exit_retries
) {
3428 tor_assert(conn
->type
== CONN_TYPE_AP
);
3429 tor_assert(edge_conn
->chosen_exit_name
);
3432 /* XXX unchecked: package window, deliver window. */
3433 if (conn
->type
== CONN_TYPE_AP
) {
3435 tor_assert(edge_conn
->socks_request
);
3436 if (conn
->state
== AP_CONN_STATE_OPEN
) {
3437 tor_assert(edge_conn
->socks_request
->has_finished
);
3438 if (!conn
->marked_for_close
) {
3439 tor_assert(edge_conn
->cpath_layer
);
3440 assert_cpath_layer_ok(edge_conn
->cpath_layer
);
3444 if (conn
->type
== CONN_TYPE_EXIT
) {
3445 tor_assert(conn
->purpose
== EXIT_PURPOSE_CONNECT
||
3446 conn
->purpose
== EXIT_PURPOSE_RESOLVE
);
3448 } else if (conn
->type
== CONN_TYPE_DIR
) {
3450 /* Purpose is only used for dir and exit types currently */
3451 tor_assert(!conn
->purpose
);
3456 case CONN_TYPE_OR_LISTENER
:
3457 case CONN_TYPE_AP_LISTENER
:
3458 case CONN_TYPE_AP_TRANS_LISTENER
:
3459 case CONN_TYPE_AP_NATD_LISTENER
:
3460 case CONN_TYPE_DIR_LISTENER
:
3461 case CONN_TYPE_CONTROL_LISTENER
:
3462 case CONN_TYPE_AP_DNS_LISTENER
:
3463 tor_assert(conn
->state
== LISTENER_STATE_READY
);
3466 tor_assert(conn
->state
>= _OR_CONN_STATE_MIN
);
3467 tor_assert(conn
->state
<= _OR_CONN_STATE_MAX
);
3468 tor_assert(TO_OR_CONN(conn
)->n_circuits
>= 0);
3470 case CONN_TYPE_EXIT
:
3471 tor_assert(conn
->state
>= _EXIT_CONN_STATE_MIN
);
3472 tor_assert(conn
->state
<= _EXIT_CONN_STATE_MAX
);
3473 tor_assert(conn
->purpose
>= _EXIT_PURPOSE_MIN
);
3474 tor_assert(conn
->purpose
<= _EXIT_PURPOSE_MAX
);
3477 tor_assert(conn
->state
>= _AP_CONN_STATE_MIN
);
3478 tor_assert(conn
->state
<= _AP_CONN_STATE_MAX
);
3479 tor_assert(TO_EDGE_CONN(conn
)->socks_request
);
3482 tor_assert(conn
->state
>= _DIR_CONN_STATE_MIN
);
3483 tor_assert(conn
->state
<= _DIR_CONN_STATE_MAX
);
3484 tor_assert(conn
->purpose
>= _DIR_PURPOSE_MIN
);
3485 tor_assert(conn
->purpose
<= _DIR_PURPOSE_MAX
);
3487 case CONN_TYPE_CPUWORKER
:
3488 tor_assert(conn
->state
>= _CPUWORKER_STATE_MIN
);
3489 tor_assert(conn
->state
<= _CPUWORKER_STATE_MAX
);
3491 case CONN_TYPE_CONTROL
:
3492 tor_assert(conn
->state
>= _CONTROL_CONN_STATE_MIN
);
3493 tor_assert(conn
->state
<= _CONTROL_CONN_STATE_MAX
);