1 /* Copyright 2001 Matej Pfajfar.
2 * Copyright 2001-2004 Roger Dingledine.
3 * Copyright 2004 Roger Dingledine, Nick Mathewson. */
4 /* See LICENSE for licensing information */
9 * \brief General high-level functions to handle reading and writing
15 /********* START VARIABLES **********/
17 /** Array of strings to make conn-\>type human-readable. */
18 const char *conn_type_to_string
[] = {
20 "OP listener", /* 1 */
22 "OR listener", /* 3 */
25 "App listener",/* 6 */
27 "Dir listener",/* 8 */
29 "DNS worker", /* 10 */
30 "CPU worker", /* 11 */
31 "Control listener", /* 12 */
35 /** Array of string arrays to make {conn-\>type,conn-\>state} human-readable. */
36 const char *conn_state_to_string
[][_CONN_TYPE_MAX
+1] = {
37 { NULL
}, /* no type associated with 0 */
38 { NULL
}, /* op listener, obsolete */
39 { NULL
}, /* op, obsolete */
40 { "ready" }, /* or listener, 0 */
42 "connect()ing", /* 1 */
43 "handshaking", /* 2 */
46 "waiting for dest info", /* 1 */
49 "resolve failed" }, /* 4 */
50 { "ready" }, /* app listener, 0 */
56 "awaiting dest info", /* app, 5 */
57 "waiting for rendezvous desc", /* 6 */
58 "waiting for safe circuit", /* 7 */
59 "waiting for connected", /* 8 */
60 "waiting for resolve", /* 9 */
62 { "ready" }, /* dir listener, 0 */
65 "client sending", /* 2 */
66 "client reading", /* 3 */
67 "awaiting command", /* 4 */
69 { "", /* dns worker, 0 */
72 { "", /* cpu worker, 0 */
74 "busy with onion", /* 2 */
75 "busy with handshake" }, /* 3 */
76 { "ready" }, /* control listener, 0 */
77 { "", /* control, 0 */
79 "waiting for authentication", }, /* 2 */
82 /********* END VARIABLES ************/
84 static int connection_create_listener(const char *bindaddress
,
85 uint16_t bindport
, int type
);
86 static int connection_init_accepted_conn(connection_t
*conn
);
87 static int connection_handle_listener_read(connection_t
*conn
, int new_type
);
88 static int connection_receiver_bucket_should_increase(connection_t
*conn
);
89 static int connection_finished_flushing(connection_t
*conn
);
90 static int connection_finished_connecting(connection_t
*conn
);
91 static int connection_reached_eof(connection_t
*conn
);
92 static int connection_read_to_buf(connection_t
*conn
, int *max_to_read
);
93 static int connection_process_inbuf(connection_t
*conn
, int package_partial
);
94 static int connection_bucket_read_limit(connection_t
*conn
);
96 /**************************************************************/
98 /** Allocate space for a new connection_t. This function just initializes
99 * conn; you must call connection_add() to link it into the main array.
101 * Set conn-\>type to <b>type</b>. Set conn-\>s and conn-\>poll_index to
102 * -1 to signify they are not yet assigned.
104 * If conn is not a listener type, allocate buffers for it. If it's
105 * an AP type, allocate space to store the socks_request.
107 * Assign a pseudorandom next_circ_id between 0 and 2**15.
109 * Initialize conn's timestamps to now.
111 connection_t
*connection_new(int type
) {
113 time_t now
= time(NULL
);
115 conn
= tor_malloc_zero(sizeof(connection_t
));
116 conn
->magic
= CONNECTION_MAGIC
;
117 conn
->s
= -1; /* give it a default of 'not used' */
118 conn
->poll_index
= -1; /* also default to 'not used' */
121 if (!connection_is_listener(conn
)) { /* listeners never use their buf */
122 conn
->inbuf
= buf_new();
123 conn
->outbuf
= buf_new();
125 if (type
== CONN_TYPE_AP
) {
126 conn
->socks_request
= tor_malloc_zero(sizeof(socks_request_t
));
129 conn
->next_circ_id
= crypto_pseudo_rand_int(1<<15);
131 conn
->timestamp_created
= now
;
132 conn
->timestamp_lastread
= now
;
133 conn
->timestamp_lastwritten
= now
;
138 /** Deallocate memory used by <b>conn</b>. Deallocate its buffers if necessary,
139 * close its socket if necessary, and mark the directory as dirty if <b>conn</b>
140 * is an OR or OP connection.
142 void connection_free(connection_t
*conn
) {
144 tor_assert(conn
->magic
== CONNECTION_MAGIC
);
146 if (!connection_is_listener(conn
)) {
147 buf_free(conn
->inbuf
);
148 buf_free(conn
->outbuf
);
150 tor_free(conn
->address
);
152 if (connection_speaks_cells(conn
)) {
153 if (conn
->state
== OR_CONN_STATE_OPEN
)
154 directory_set_dirty();
156 tor_tls_free(conn
->tls
);
159 if (conn
->identity_pkey
)
160 crypto_free_pk_env(conn
->identity_pkey
);
161 tor_free(conn
->nickname
);
162 tor_free(conn
->socks_request
);
165 log_fn(LOG_INFO
,"closing fd %d.",conn
->s
);
166 tor_close_socket(conn
->s
);
168 memset(conn
, 0xAA, sizeof(connection_t
)); /* poison memory */
172 /** Call connection_free() on every connection in our array.
173 * This is used by cpuworkers and dnsworkers when they fork,
174 * so they don't keep resources held open (especially sockets).
176 void connection_free_all(void) {
178 connection_t
**carray
;
180 get_connection_array(&carray
,&n
);
182 connection_free(carray
[i
]);
185 /** Do any cleanup needed:
186 * - Directory conns that failed to fetch a rendezvous descriptor
187 * need to inform pending rendezvous streams.
188 * - OR conns need to call rep_hist_note_*() to record status.
189 * - AP conns need to send a socks reject if necessary.
190 * - Exit conns need to call connection_dns_remove() if necessary.
191 * - AP and Exit conns need to send an end cell if they can.
192 * - DNS conns need to fail any resolves that are pending on them.
194 void connection_about_to_close_connection(connection_t
*conn
)
197 assert(conn
->marked_for_close
);
199 if (conn
->type
== CONN_TYPE_AP
|| conn
->type
== CONN_TYPE_EXIT
) {
200 if (!conn
->has_sent_end
)
201 log_fn(LOG_WARN
,"Edge connection hasn't sent end yet? Bug.");
204 switch (conn
->type
) {
206 if (conn
->purpose
== DIR_PURPOSE_FETCH_RENDDESC
)
207 rend_client_desc_fetched(conn
->rend_query
, 0);
210 /* Remember why we're closing this connection. */
211 if (conn
->state
!= OR_CONN_STATE_OPEN
) {
212 if (connection_or_nonopen_was_started_here(conn
)) {
213 rep_hist_note_connect_failed(conn
->identity_digest
, time(NULL
));
214 control_event_or_conn_status(conn
, OR_CONN_EVENT_FAILED
);
216 } else if (conn
->hold_open_until_flushed
) {
217 /* XXXX009 We used to have an arg that told us whether we closed the
218 * connection on purpose or not. Can we use hold_open_until_flushed
219 * instead? We only set it when we are intentionally closing a
222 * (Of course, now things we set to close which expire rather than
223 * flushing still get noted as dead, not disconnected. But this is an
226 rep_hist_note_disconnect(conn
->identity_digest
, time(NULL
));
227 control_event_or_conn_status(conn
, OR_CONN_EVENT_CLOSED
);
228 } else if (conn
->identity_digest
) {
229 rep_hist_note_connection_died(conn
->identity_digest
, time(NULL
));
230 control_event_or_conn_status(conn
, OR_CONN_EVENT_CLOSED
);
234 if (conn
->socks_request
->has_finished
== 0) {
235 log_fn(LOG_INFO
,"Cleaning up AP -- sending socks reject.");
236 connection_ap_handshake_socks_reply(conn
, NULL
, 0, -1);
237 conn
->socks_request
->has_finished
= 1;
238 conn
->hold_open_until_flushed
= 1;
240 control_event_stream_status(conn
, STREAM_EVENT_CLOSED
);
244 if (conn
->state
== EXIT_CONN_STATE_RESOLVING
) {
245 circuit_detach_stream(circuit_get_by_conn(conn
), conn
);
246 connection_dns_remove(conn
);
249 case CONN_TYPE_DNSWORKER
:
250 if (conn
->state
== DNSWORKER_STATE_BUSY
) {
251 dns_cancel_pending_resolve(conn
->address
);
257 /** Close the underlying socket for <b>conn</b>, so we don't try to
258 * flush it. Must be used in conjunction with (right before)
259 * connection_mark_for_close().
261 void connection_close_immediate(connection_t
*conn
)
263 assert_connection_ok(conn
,0);
265 log_fn(LOG_WARN
,"Attempt to close already-closed connection.");
268 if (conn
->outbuf_flushlen
) {
269 log_fn(LOG_INFO
,"fd %d, type %s, state %d, %d bytes on outbuf.",
270 conn
->s
, CONN_TYPE_TO_STRING(conn
->type
),
271 conn
->state
, (int)conn
->outbuf_flushlen
);
273 tor_close_socket(conn
->s
);
275 if (!connection_is_listener(conn
)) {
276 buf_clear(conn
->outbuf
);
277 conn
->outbuf_flushlen
= 0;
281 /** Mark <b>conn</b> to be closed next time we loop through
282 * conn_close_if_marked() in main.c. */
284 _connection_mark_for_close(connection_t
*conn
)
286 assert_connection_ok(conn
,0);
288 if (conn
->marked_for_close
) {
289 log(LOG_WARN
, "Double mark-for-close on connection.");
293 conn
->marked_for_close
= 1;
295 /* in case we're going to be held-open-til-flushed, reset
296 * the number of seconds since last successful write, so
297 * we get our whole 15 seconds */
298 conn
->timestamp_lastwritten
= time(NULL
);
303 /** Find each connection that has hold_open_until_flushed set to
304 * 1 but hasn't written in the past 15 seconds, and set
305 * hold_open_until_flushed to 0. This means it will get cleaned
306 * up in the next loop through close_if_marked() in main.c.
308 void connection_expire_held_open(void)
310 connection_t
**carray
, *conn
;
316 get_connection_array(&carray
, &n
);
317 for (i
= 0; i
< n
; ++i
) {
319 /* If we've been holding the connection open, but we haven't written
322 if (conn
->hold_open_until_flushed
) {
323 tor_assert(conn
->marked_for_close
);
324 if (now
- conn
->timestamp_lastwritten
>= 15) {
325 log_fn(LOG_WARN
,"Giving up on marked_for_close conn that's been flushing for 15s (fd %d, type %s, state %d).",
326 conn
->s
, CONN_TYPE_TO_STRING(conn
->type
), conn
->state
);
327 conn
->hold_open_until_flushed
= 0;
333 /** Bind a new non-blocking socket listening to
334 * <b>bindaddress</b>:<b>bindport</b>, and add this new connection
335 * (of type <b>type</b>) to the connection array.
337 * If <b>bindaddress</b> includes a port, we bind on that port; otherwise, we
340 static int connection_create_listener(const char *bindaddress
, uint16_t bindport
, int type
) {
341 struct sockaddr_in bindaddr
; /* where to bind */
345 int s
; /* the socket we're going to make */
348 memset(&bindaddr
,0,sizeof(struct sockaddr_in
));
349 if (parse_addr_port(bindaddress
, NULL
, &addr
, &usePort
)<0) {
350 log_fn(LOG_WARN
, "Error parsing/resolving BindAddress %s",bindaddress
);
356 bindaddr
.sin_addr
.s_addr
= htonl(addr
);
357 bindaddr
.sin_family
= AF_INET
;
358 bindaddr
.sin_port
= htons((uint16_t) usePort
);
360 s
= socket(PF_INET
,SOCK_STREAM
,IPPROTO_TCP
);
362 log_fn(LOG_WARN
,"Socket creation failed.");
366 setsockopt(s
, SOL_SOCKET
, SO_REUSEADDR
, (void*) &one
, sizeof(one
));
368 if (bind(s
,(struct sockaddr
*)&bindaddr
,sizeof(bindaddr
)) < 0) {
369 log_fn(LOG_WARN
,"Could not bind to port %u: %s",usePort
,
370 tor_socket_strerror(tor_socket_errno(s
)));
374 if (listen(s
,SOMAXCONN
) < 0) {
375 log_fn(LOG_WARN
,"Could not listen on port %u: %s",usePort
,
376 tor_socket_strerror(tor_socket_errno(s
)));
380 set_socket_nonblocking(s
);
382 conn
= connection_new(type
);
385 if (connection_add(conn
) < 0) { /* no space, forget it */
386 log_fn(LOG_WARN
,"connection_add failed. Giving up.");
387 connection_free(conn
);
391 log_fn(LOG_DEBUG
,"%s listening on port %u.",conn_type_to_string
[type
], usePort
);
393 conn
->state
= LISTENER_STATE_READY
;
394 connection_start_reading(conn
);
399 /** The listener connection <b>conn</b> told poll() it wanted to read.
400 * Call accept() on conn-\>s, and add the new connection if necessary.
402 static int connection_handle_listener_read(connection_t
*conn
, int new_type
) {
403 int news
; /* the new socket */
404 connection_t
*newconn
;
405 /* information about the remote peer when connecting to other routers */
406 struct sockaddr_in remote
;
407 /* length of the remote address. Must be an int, since accept() needs that. */
408 int remotelen
= sizeof(struct sockaddr_in
);
410 news
= accept(conn
->s
,(struct sockaddr
*)&remote
,&remotelen
);
411 if (news
== -1) { /* accept() error */
412 int e
= tor_socket_errno(conn
->s
);
413 if (ERRNO_IS_ACCEPT_EAGAIN(e
)) {
414 return 0; /* he hung up before we could accept(). that's fine. */
415 } else if (ERRNO_IS_ACCEPT_RESOURCE_LIMIT(e
)) {
416 log_fn(LOG_WARN
,"accept failed: %s. Dropping incoming connection.",
417 tor_socket_strerror(e
));
420 /* else there was a real error. */
421 log_fn(LOG_WARN
,"accept() failed: %s. Closing listener.",
422 tor_socket_strerror(e
));
423 connection_mark_for_close(conn
);
426 log(LOG_INFO
,"Connection accepted on socket %d (child of fd %d).",news
, conn
->s
);
428 set_socket_nonblocking(news
);
430 /* process entrance policies here, before we even create the connection */
431 if (new_type
== CONN_TYPE_AP
) {
432 /* check sockspolicy to see if we should accept it */
433 if (socks_policy_permits_address(ntohl(remote
.sin_addr
.s_addr
)) == 0) {
434 log_fn(LOG_WARN
,"Denying socks connection from untrusted address %s.",
435 inet_ntoa(remote
.sin_addr
));
436 tor_close_socket(news
);
440 if (new_type
== CONN_TYPE_DIR
) {
441 /* check dirpolicy to see if we should accept it */
442 if (dir_policy_permits_address(ntohl(remote
.sin_addr
.s_addr
)) == 0) {
443 log_fn(LOG_WARN
,"Denying dir connection from address %s.",
444 inet_ntoa(remote
.sin_addr
));
445 tor_close_socket(news
);
450 newconn
= connection_new(new_type
);
453 newconn
->address
= tor_strdup(inet_ntoa(remote
.sin_addr
)); /* remember the remote address */
454 newconn
->addr
= ntohl(remote
.sin_addr
.s_addr
);
455 newconn
->port
= ntohs(remote
.sin_port
);
457 if (connection_add(newconn
) < 0) { /* no space, forget it */
458 connection_free(newconn
);
459 return 0; /* no need to tear down the parent */
462 if (connection_init_accepted_conn(newconn
) < 0) {
463 connection_mark_for_close(newconn
);
469 /** Initialize states for newly accepted connection <b>conn</b>.
470 * If conn is an OR, start the tls handshake.
472 static int connection_init_accepted_conn(connection_t
*conn
) {
474 connection_start_reading(conn
);
476 switch (conn
->type
) {
478 return connection_tls_start_handshake(conn
, 1);
480 conn
->state
= AP_CONN_STATE_SOCKS_WAIT
;
483 conn
->purpose
= DIR_PURPOSE_SERVER
;
484 conn
->state
= DIR_CONN_STATE_SERVER_COMMAND_WAIT
;
486 case CONN_TYPE_CONTROL
:
487 conn
->state
= CONTROL_CONN_STATE_NEEDAUTH
;
493 /** Take conn, make a nonblocking socket; try to connect to
494 * addr:port (they arrive in *host order*). If fail, return -1. Else
495 * assign s to conn->\s: if connected return 1, if EAGAIN return 0.
497 * address is used to make the logs useful.
499 * On success, add conn to the list of polled connections.
501 int connection_connect(connection_t
*conn
, char *address
, uint32_t addr
, uint16_t port
) {
503 struct sockaddr_in dest_addr
;
504 or_options_t
*options
= get_options();
506 s
=socket(PF_INET
,SOCK_STREAM
,IPPROTO_TCP
);
508 log_fn(LOG_WARN
,"Error creating network socket: %s",
509 tor_socket_strerror(tor_socket_errno(-1)));
513 if (options
->OutboundBindAddress
) {
514 struct sockaddr_in ext_addr
;
516 memset(&ext_addr
, 0, sizeof(ext_addr
));
517 ext_addr
.sin_family
= AF_INET
;
518 ext_addr
.sin_port
= 0;
519 if (!tor_inet_aton(options
->OutboundBindAddress
, &ext_addr
.sin_addr
)) {
520 log_fn(LOG_WARN
,"Outbound bind address '%s' didn't parse. Ignoring.",
521 options
->OutboundBindAddress
);
523 if (bind(s
, (struct sockaddr
*)&ext_addr
, sizeof(ext_addr
)) < 0) {
524 log_fn(LOG_WARN
,"Error binding network socket: %s",
525 tor_socket_strerror(tor_socket_errno(s
)));
531 set_socket_nonblocking(s
);
533 memset(&dest_addr
,0,sizeof(dest_addr
));
534 dest_addr
.sin_family
= AF_INET
;
535 dest_addr
.sin_port
= htons(port
);
536 dest_addr
.sin_addr
.s_addr
= htonl(addr
);
538 log_fn(LOG_DEBUG
,"Connecting to %s:%u.",address
,port
);
540 if (connect(s
,(struct sockaddr
*)&dest_addr
,sizeof(dest_addr
)) < 0) {
541 int e
= tor_socket_errno(s
);
542 if (!ERRNO_IS_CONN_EINPROGRESS(e
)) {
544 log_fn(LOG_INFO
,"Connect() to %s:%u failed: %s",address
,port
,
545 tor_socket_strerror(e
));
549 /* it's in progress. set state appropriately and return. */
551 if (connection_add(conn
) < 0) /* no space, forget it */
553 log_fn(LOG_DEBUG
,"connect in progress, socket %d.",s
);
558 /* it succeeded. we're connected. */
559 log_fn(LOG_INFO
,"Connection to %s:%u established.",address
,port
);
561 if (connection_add(conn
) < 0) /* no space, forget it */
566 /** If there exist any listeners of type <b>type</b> in the connection
567 * array, mark them for close.
569 static void listener_close_if_present(int type
) {
571 connection_t
**carray
;
573 tor_assert(type
== CONN_TYPE_OR_LISTENER
||
574 type
== CONN_TYPE_AP_LISTENER
||
575 type
== CONN_TYPE_DIR_LISTENER
||
576 type
== CONN_TYPE_CONTROL_LISTENER
);
577 get_connection_array(&carray
,&n
);
580 if (conn
->type
== type
&& !conn
->marked_for_close
) {
581 connection_close_immediate(conn
);
582 connection_mark_for_close(conn
);
588 * Launch any configured listener connections of type <b>type</b>. (A
589 * listener is configured if <b>port_option</b> is non-zero. If any
590 * BindAddress configuration options are given in <b>cfg</b>, create a
591 * connection binding to each one. Otherwise, create a single
592 * connection binding to the address <b>default_addr</b>.)
594 * If <b>force</b> is true, close and re-open all listener connections.
595 * Otherwise, only relaunch the listeners of this type if the number of
596 * existing connections is not as configured (e.g., because one died).
598 static int retry_listeners(int type
, struct config_line_t
*cfg
,
599 int port_option
, const char *default_addr
,
603 int want
, have
, n_conn
, i
;
604 struct config_line_t
*c
;
606 connection_t
**carray
;
607 /* How many should there be? */
608 if (cfg
&& port_option
) {
610 for (c
= cfg
; c
; c
= c
->next
)
612 } else if (port_option
) {
618 /* How many are there actually? */
620 get_connection_array(&carray
,&n_conn
);
621 for (i
=0;i
<n_conn
;i
++) {
623 if (conn
->type
== type
&& !conn
->marked_for_close
)
627 /* If we have the right number of listeners, do nothing. */
631 /* Otherwise, warn the user and relaunch. */
632 log_fn(LOG_WARN
,"We have %d %s(s) open, but we want %d; relaunching.",
633 have
, conn_type_to_string
[type
], want
);
636 listener_close_if_present(type
);
639 if (connection_create_listener(default_addr
, (uint16_t) port_option
,
643 for ( ; cfg
; cfg
= cfg
->next
) {
644 if (connection_create_listener(cfg
->value
, (uint16_t) port_option
,
653 /** (Re)launch listeners for each port you should have open. If
654 * <b>force</b> is true, close and relaunch all listeners. If <b>force</b>
655 * is false, then only relaunch listeners when we have the wrong number of
656 * connections for a given type.
658 int retry_all_listeners(int force
) {
659 or_options_t
*options
= get_options();
661 if (retry_listeners(CONN_TYPE_OR_LISTENER
, options
->ORBindAddress
,
662 options
->ORPort
, "0.0.0.0", force
)<0)
664 if (retry_listeners(CONN_TYPE_DIR_LISTENER
, options
->DirBindAddress
,
665 options
->DirPort
, "0.0.0.0", force
)<0)
667 if (retry_listeners(CONN_TYPE_AP_LISTENER
, options
->SocksBindAddress
,
668 options
->SocksPort
, "127.0.0.1", force
)<0)
670 if (retry_listeners(CONN_TYPE_CONTROL_LISTENER
, NULL
,
671 options
->ControlPort
, "127.0.0.1", force
)<0)
677 extern int global_read_bucket
, global_write_bucket
;
679 /** How many bytes at most can we read onto this connection? */
680 static int connection_bucket_read_limit(connection_t
*conn
) {
683 /* do a rudimentary round-robin so one circuit can't hog a connection */
684 if (connection_speaks_cells(conn
)) {
685 at_most
= 32*(CELL_NETWORK_SIZE
);
687 at_most
= 32*(RELAY_PAYLOAD_SIZE
);
690 if (at_most
> global_read_bucket
)
691 at_most
= global_read_bucket
;
693 if (connection_speaks_cells(conn
) && conn
->state
== OR_CONN_STATE_OPEN
)
694 if (at_most
> conn
->receiver_bucket
)
695 at_most
= conn
->receiver_bucket
;
700 /** We just read num_read onto conn. Decrement buckets appropriately. */
701 static void connection_read_bucket_decrement(connection_t
*conn
, int num_read
) {
702 global_read_bucket
-= num_read
; tor_assert(global_read_bucket
>= 0);
703 if (connection_speaks_cells(conn
) && conn
->state
== OR_CONN_STATE_OPEN
) {
704 conn
->receiver_bucket
-= num_read
; tor_assert(conn
->receiver_bucket
>= 0);
708 static void connection_consider_empty_buckets(connection_t
*conn
) {
709 if (global_read_bucket
== 0) {
710 log_fn(LOG_DEBUG
,"global bucket exhausted. Pausing.");
711 conn
->wants_to_read
= 1;
712 connection_stop_reading(conn
);
715 if (connection_speaks_cells(conn
) &&
716 conn
->state
== OR_CONN_STATE_OPEN
&&
717 conn
->receiver_bucket
== 0) {
718 log_fn(LOG_DEBUG
,"receiver bucket exhausted. Pausing.");
719 conn
->wants_to_read
= 1;
720 connection_stop_reading(conn
);
724 /** Initialize the global read bucket to options->BandwidthBurst,
725 * and current_time to the current time. */
726 void connection_bucket_init(void) {
727 or_options_t
*options
= get_options();
728 global_read_bucket
= (int)options
->BandwidthBurst
; /* start it at max traffic */
729 global_write_bucket
= (int)options
->BandwidthBurst
; /* start it at max traffic */
732 /** A second has rolled over; increment buckets appropriately. */
733 void connection_bucket_refill(struct timeval
*now
) {
736 connection_t
**carray
;
737 or_options_t
*options
= get_options();
739 /* refill the global buckets */
740 if ((unsigned)global_read_bucket
< options
->BandwidthBurst
) {
741 global_read_bucket
+= (int)options
->BandwidthRate
;
742 log_fn(LOG_DEBUG
,"global_read_bucket now %d.", global_read_bucket
);
744 if ((unsigned)global_write_bucket
< options
->BandwidthBurst
) {
745 global_write_bucket
+= (int)options
->BandwidthRate
;
746 log_fn(LOG_DEBUG
,"global_write_bucket now %d.", global_write_bucket
);
749 /* refill the per-connection buckets */
750 get_connection_array(&carray
,&n
);
754 if (connection_receiver_bucket_should_increase(conn
)) {
755 conn
->receiver_bucket
+= conn
->bandwidth
;
756 //log_fn(LOG_DEBUG,"Receiver bucket %d now %d.", i, conn->receiver_bucket);
759 if (conn
->wants_to_read
== 1 /* it's marked to turn reading back on now */
760 && global_read_bucket
> 0 /* and we're allowed to read */
761 && global_write_bucket
> 0 /* and we're allowed to write (XXXX,
762 * not the best place to check this.) */
763 && (!connection_speaks_cells(conn
) ||
764 conn
->state
!= OR_CONN_STATE_OPEN
||
765 conn
->receiver_bucket
> 0)) {
766 /* and either a non-cell conn or a cell conn with non-empty bucket */
767 log_fn(LOG_DEBUG
,"waking up conn (fd %d)",conn
->s
);
768 conn
->wants_to_read
= 0;
769 connection_start_reading(conn
);
770 if (conn
->wants_to_write
== 1) {
771 conn
->wants_to_write
= 0;
772 connection_start_writing(conn
);
778 /** Is the receiver bucket for connection <b>conn</b> low enough that we
779 * should add another pile of tokens to it?
781 static int connection_receiver_bucket_should_increase(connection_t
*conn
) {
784 if (!connection_speaks_cells(conn
))
785 return 0; /* edge connections don't use receiver_buckets */
786 if (conn
->state
!= OR_CONN_STATE_OPEN
)
787 return 0; /* only open connections play the rate limiting game */
789 tor_assert(conn
->bandwidth
> 0);
790 if (conn
->receiver_bucket
> 9*conn
->bandwidth
)
796 /** Read bytes from conn->\s and process them.
798 * This function gets called from conn_read() in main.c, either
799 * when poll() has declared that conn wants to read, or (for OR conns)
800 * when there are pending TLS bytes.
802 * It calls connection_read_to_buf() to bring in any new bytes,
803 * and then calls connection_process_inbuf() to process them.
805 * Mark the connection and return -1 if you want to close it, else
808 int connection_handle_read(connection_t
*conn
) {
809 int max_to_read
=-1, try_to_read
;
811 conn
->timestamp_lastread
= time(NULL
);
813 switch (conn
->type
) {
814 case CONN_TYPE_OR_LISTENER
:
815 return connection_handle_listener_read(conn
, CONN_TYPE_OR
);
816 case CONN_TYPE_AP_LISTENER
:
817 return connection_handle_listener_read(conn
, CONN_TYPE_AP
);
818 case CONN_TYPE_DIR_LISTENER
:
819 return connection_handle_listener_read(conn
, CONN_TYPE_DIR
);
820 case CONN_TYPE_CONTROL_LISTENER
:
821 return connection_handle_listener_read(conn
, CONN_TYPE_CONTROL
);
825 try_to_read
= max_to_read
;
826 tor_assert(!conn
->marked_for_close
);
827 if (connection_read_to_buf(conn
, &max_to_read
) < 0) {
828 /* There's a read error; kill the connection.*/
829 connection_close_immediate(conn
); /* Don't flush; connection is dead. */
830 if (conn
->type
== CONN_TYPE_AP
|| conn
->type
== CONN_TYPE_EXIT
) {
831 connection_edge_end(conn
, (char)(connection_state_is_open(conn
) ?
832 END_STREAM_REASON_MISC
: END_STREAM_REASON_CONNECTFAILED
),
835 connection_mark_for_close(conn
);
836 if (conn
->type
== CONN_TYPE_DIR
&&
837 conn
->state
== DIR_CONN_STATE_CONNECTING
) {
838 /* it's a directory server and connecting failed: forget about this router */
839 /* XXX I suspect pollerr may make Windows not get to this point. :( */
840 router_mark_as_down(conn
->identity_digest
);
841 if (conn
->purpose
== DIR_PURPOSE_FETCH_DIR
&&
842 !all_trusted_directory_servers_down()) {
843 log_fn(LOG_INFO
,"Giving up on dirserver %s; trying another.", conn
->address
);
844 directory_get_from_dirserver(DIR_PURPOSE_FETCH_DIR
, NULL
);
849 if (CONN_IS_EDGE(conn
) &&
850 try_to_read
!= max_to_read
) {
851 /* instruct it not to try to package partial cells. */
852 if (connection_process_inbuf(conn
, 0) < 0) {
855 if (!conn
->marked_for_close
&&
856 connection_is_reading(conn
) &&
857 !conn
->inbuf_reached_eof
)
858 goto loop_again
; /* try reading again, in case more is here now */
860 /* one last try, packaging partial cells and all. */
861 if (!conn
->marked_for_close
&&
862 connection_process_inbuf(conn
, 1) < 0) {
865 if (!conn
->marked_for_close
&&
866 conn
->inbuf_reached_eof
&&
867 connection_reached_eof(conn
) < 0) {
873 /** Pull in new bytes from conn-\>s onto conn-\>inbuf, either
874 * directly or via TLS. Reduce the token buckets by the number of
877 * If *max_to_read is -1, then decide it ourselves, else go with the
878 * value passed to us. When returning, if it's changed, subtract the
879 * number of bytes we read from *max_to_read.
881 * Return -1 if we want to break conn, else return 0.
883 static int connection_read_to_buf(connection_t
*conn
, int *max_to_read
) {
884 int result
, at_most
= *max_to_read
;
886 if (at_most
== -1) { /* we need to initialize it */
887 /* how many bytes are we allowed to read? */
888 at_most
= connection_bucket_read_limit(conn
);
891 if (connection_speaks_cells(conn
) && conn
->state
!= OR_CONN_STATE_CONNECTING
) {
892 if (conn
->state
== OR_CONN_STATE_HANDSHAKING
) {
893 /* continue handshaking even if global token bucket is empty */
894 return connection_tls_continue_handshake(conn
);
897 log_fn(LOG_DEBUG
,"%d: starting, inbuf_datalen %d (%d pending in tls object). at_most %d.",
898 conn
->s
,(int)buf_datalen(conn
->inbuf
),tor_tls_get_pending_bytes(conn
->tls
), at_most
);
900 /* else open, or closing */
901 result
= read_to_buf_tls(conn
->tls
, at_most
, conn
->inbuf
);
905 log_fn(LOG_INFO
,"TLS connection closed on read. Closing. (Nickname %s, address %s",
906 conn
->nickname
? conn
->nickname
: "not set", conn
->address
);
909 log_fn(LOG_INFO
,"tls error. breaking (nickname %s, address %s).",
910 conn
->nickname
? conn
->nickname
: "not set", conn
->address
);
912 case TOR_TLS_WANTWRITE
:
913 connection_start_writing(conn
);
915 case TOR_TLS_WANTREAD
: /* we're already reading */
916 case TOR_TLS_DONE
: /* no data read, so nothing to process */
918 break; /* so we call bucket_decrement below */
921 result
= read_to_buf(conn
->s
, at_most
, conn
->inbuf
,
922 &conn
->inbuf_reached_eof
);
924 // log(LOG_DEBUG,"connection_read_to_buf(): read_to_buf returned %d.",read_result);
930 if (result
> 0) { /* change *max_to_read */
931 *max_to_read
= at_most
- result
;
934 if (result
> 0 && !is_local_IP(conn
->addr
)) { /* remember it */
935 rep_hist_note_bytes_read(result
, time(NULL
));
936 connection_read_bucket_decrement(conn
, result
);
939 /* Call even if result is 0, since the global read bucket may
940 * have reached 0 on a different conn, and this guy needs to
941 * know to stop reading. */
942 connection_consider_empty_buckets(conn
);
947 /** A pass-through to fetch_from_buf. */
948 int connection_fetch_from_buf(char *string
, size_t len
, connection_t
*conn
) {
949 return fetch_from_buf(string
, len
, conn
->inbuf
);
952 /** Return conn-\>outbuf_flushlen: how many bytes conn wants to flush
953 * from its outbuf. */
954 int connection_wants_to_flush(connection_t
*conn
) {
955 return conn
->outbuf_flushlen
;
958 /** Are there too many bytes on edge connection <b>conn</b>'s outbuf to
959 * send back a relay-level sendme yet? Return 1 if so, 0 if not. Used by
960 * connection_edge_consider_sending_sendme().
962 int connection_outbuf_too_full(connection_t
*conn
) {
963 return (conn
->outbuf_flushlen
> 10*CELL_PAYLOAD_SIZE
);
966 /** Try to flush more bytes onto conn-\>s.
968 * This function gets called either from conn_write() in main.c
969 * when poll() has declared that conn wants to write, or below
970 * from connection_write_to_buf() when an entire TLS record is ready.
972 * Update conn-\>timestamp_lastwritten to now, and call flush_buf
973 * or flush_buf_tls appropriately. If it succeeds and there no more
974 * more bytes on conn->outbuf, then call connection_finished_flushing
977 * Mark the connection and return -1 if you want to close it, else
980 int connection_handle_write(connection_t
*conn
) {
981 int e
, len
=sizeof(e
);
983 time_t now
= time(NULL
);
985 tor_assert(!connection_is_listener(conn
));
987 conn
->timestamp_lastwritten
= now
;
989 /* Sometimes, "writeable" means "connected". */
990 if (connection_state_is_connecting(conn
)) {
991 if (getsockopt(conn
->s
, SOL_SOCKET
, SO_ERROR
, (void*)&e
, &len
) < 0) {
992 log_fn(LOG_WARN
,"getsockopt() syscall failed?! Please report to tor-ops.");
993 connection_close_immediate(conn
);
994 connection_mark_for_close(conn
);
998 /* some sort of error, but maybe just inprogress still */
999 if (!ERRNO_IS_CONN_EINPROGRESS(e
)) {
1000 log_fn(LOG_INFO
,"in-progress connect failed. Removing.");
1001 connection_close_immediate(conn
);
1002 connection_mark_for_close(conn
);
1003 /* it's safe to pass OPs to router_mark_as_down(), since it just
1004 * ignores unrecognized routers
1006 if (conn
->type
== CONN_TYPE_OR
)
1007 router_mark_as_down(conn
->identity_digest
);
1010 return 0; /* no change, see if next time is better */
1013 /* The connection is successful. */
1014 return connection_finished_connecting(conn
);
1017 if (connection_speaks_cells(conn
)) {
1018 if (conn
->state
== OR_CONN_STATE_HANDSHAKING
) {
1019 connection_stop_writing(conn
);
1020 if (connection_tls_continue_handshake(conn
) < 0) {
1021 connection_close_immediate(conn
); /* Don't flush; connection is dead. */
1022 connection_mark_for_close(conn
);
1028 /* else open, or closing */
1029 result
= flush_buf_tls(conn
->tls
, conn
->outbuf
, &conn
->outbuf_flushlen
);
1033 log_fn(LOG_INFO
,result
==TOR_TLS_ERROR
?
1034 "tls error. breaking.":"TLS connection closed on flush");
1035 connection_close_immediate(conn
); /* Don't flush; connection is dead. */
1036 connection_mark_for_close(conn
);
1038 case TOR_TLS_WANTWRITE
:
1039 log_fn(LOG_DEBUG
,"wanted write.");
1040 /* we're already writing */
1042 case TOR_TLS_WANTREAD
:
1043 /* Make sure to avoid a loop if the receive buckets are empty. */
1044 log_fn(LOG_DEBUG
,"wanted read.");
1045 if (!connection_is_reading(conn
)) {
1046 connection_stop_writing(conn
);
1047 conn
->wants_to_write
= 1;
1048 /* we'll start reading again when the next second arrives,
1049 * and then also start writing again.
1052 /* else no problem, we're already reading */
1054 /* case TOR_TLS_DONE:
1055 * for TOR_TLS_DONE, fall through to check if the flushlen
1056 * is empty, so we can stop writing.
1060 result
= flush_buf(conn
->s
, conn
->outbuf
, &conn
->outbuf_flushlen
);
1062 connection_close_immediate(conn
); /* Don't flush; connection is dead. */
1063 conn
->has_sent_end
= 1;
1064 connection_mark_for_close(conn
);
1069 if (result
> 0 && !is_local_IP(conn
->addr
)) { /* remember it */
1070 rep_hist_note_bytes_written(result
, now
);
1071 global_write_bucket
-= result
;
1074 if (!connection_wants_to_flush(conn
)) { /* it's done flushing */
1075 if (connection_finished_flushing(conn
) < 0) {
1076 /* already marked */
1084 /** Append <b>len</b> bytes of <b>string</b> onto <b>conn</b>'s
1085 * outbuf, and ask it to start writing.
1087 void connection_write_to_buf(const char *string
, size_t len
, connection_t
*conn
) {
1089 if (!len
|| conn
->marked_for_close
)
1092 if (write_to_buf(string
, len
, conn
->outbuf
) < 0) {
1093 if (conn
->type
== CONN_TYPE_AP
|| conn
->type
== CONN_TYPE_EXIT
) {
1094 /* if it failed, it means we have our package/delivery windows set
1095 wrong compared to our max outbuf size. close the whole circuit. */
1096 log_fn(LOG_WARN
,"write_to_buf failed. Closing circuit (fd %d).", conn
->s
);
1097 circuit_mark_for_close(circuit_get_by_conn(conn
));
1099 log_fn(LOG_WARN
,"write_to_buf failed. Closing connection (fd %d).", conn
->s
);
1100 connection_mark_for_close(conn
);
1105 connection_start_writing(conn
);
1106 conn
->outbuf_flushlen
+= len
;
1109 /** Return the conn to addr/port that has the most recent
1110 * timestamp_created, or NULL if no such conn exists. */
1111 connection_t
*connection_exact_get_by_addr_port(uint32_t addr
, uint16_t port
) {
1113 connection_t
*conn
, *best
=NULL
;
1114 connection_t
**carray
;
1116 get_connection_array(&carray
,&n
);
1119 if (conn
->addr
== addr
&& conn
->port
== port
&& !conn
->marked_for_close
&&
1120 (!best
|| best
->timestamp_created
< conn
->timestamp_created
))
1126 connection_t
*connection_get_by_identity_digest(const char *digest
, int type
)
1129 connection_t
*conn
, *best
=NULL
;
1130 connection_t
**carray
;
1132 get_connection_array(&carray
,&n
);
1135 if (conn
->type
!= type
)
1137 if (!memcmp(conn
->identity_digest
, digest
, DIGEST_LEN
)
1138 && !conn
->marked_for_close
1139 && (!best
|| best
->timestamp_created
< conn
->timestamp_created
))
1145 /** Return a connection of type <b>type</b> that is not marked for
1148 connection_t
*connection_get_by_type(int type
) {
1151 connection_t
**carray
;
1153 get_connection_array(&carray
,&n
);
1156 if (conn
->type
== type
&& !conn
->marked_for_close
)
1162 /** Return a connection of type <b>type</b> that is in state <b>state</b>,
1163 * and that is not marked for close.
1165 connection_t
*connection_get_by_type_state(int type
, int state
) {
1168 connection_t
**carray
;
1170 get_connection_array(&carray
,&n
);
1173 if (conn
->type
== type
&& conn
->state
== state
&& !conn
->marked_for_close
)
1179 /** Return the connection of type <b>type</b> that is in state
1180 * <b>state</b>, that was written to least recently, and that is not
1183 connection_t
*connection_get_by_type_state_lastwritten(int type
, int state
) {
1185 connection_t
*conn
, *best
=NULL
;
1186 connection_t
**carray
;
1188 get_connection_array(&carray
,&n
);
1191 if (conn
->type
== type
&& conn
->state
== state
&& !conn
->marked_for_close
)
1192 if (!best
|| conn
->timestamp_lastwritten
< best
->timestamp_lastwritten
)
1198 /** Return a connection of type <b>type</b> that has rendquery equal
1199 * to <b>rendquery</b>, and that is not marked for close.
1201 connection_t
*connection_get_by_type_rendquery(int type
, const char *rendquery
) {
1204 connection_t
**carray
;
1206 get_connection_array(&carray
,&n
);
1209 if (conn
->type
== type
&&
1210 !conn
->marked_for_close
&&
1211 !rend_cmp_service_ids(rendquery
, conn
->rend_query
))
1217 /** Return 1 if <b>conn</b> is a listener conn, else return 0. */
1218 int connection_is_listener(connection_t
*conn
) {
1219 if (conn
->type
== CONN_TYPE_OR_LISTENER
||
1220 conn
->type
== CONN_TYPE_AP_LISTENER
||
1221 conn
->type
== CONN_TYPE_DIR_LISTENER
||
1222 conn
->type
== CONN_TYPE_CONTROL_LISTENER
)
1227 /** Return 1 if <b>conn</b> is in state "open" and is not marked
1228 * for close, else return 0.
1230 int connection_state_is_open(connection_t
*conn
) {
1233 if (conn
->marked_for_close
)
1236 if ((conn
->type
== CONN_TYPE_OR
&& conn
->state
== OR_CONN_STATE_OPEN
) ||
1237 (conn
->type
== CONN_TYPE_AP
&& conn
->state
== AP_CONN_STATE_OPEN
) ||
1238 (conn
->type
== CONN_TYPE_EXIT
&& conn
->state
== EXIT_CONN_STATE_OPEN
) ||
1239 (conn
->type
== CONN_TYPE_CONTROL
&& conn
->state
==CONTROL_CONN_STATE_OPEN
))
1245 /** Return 1 if conn is in 'connecting' state, else return 0. */
1246 int connection_state_is_connecting(connection_t
*conn
) {
1249 if (conn
->marked_for_close
)
1254 return conn
->state
== OR_CONN_STATE_CONNECTING
;
1255 case CONN_TYPE_EXIT
:
1256 return conn
->state
== EXIT_CONN_STATE_CONNECTING
;
1258 return conn
->state
== DIR_CONN_STATE_CONNECTING
;
1264 /** Write a destroy cell with circ ID <b>circ_id</b> onto OR connection
1269 int connection_send_destroy(uint16_t circ_id
, connection_t
*conn
) {
1273 tor_assert(connection_speaks_cells(conn
));
1275 memset(&cell
, 0, sizeof(cell_t
));
1276 cell
.circ_id
= circ_id
;
1277 cell
.command
= CELL_DESTROY
;
1278 log_fn(LOG_INFO
,"Sending destroy (circID %d).", circ_id
);
1279 connection_or_write_cell_to_buf(&cell
, conn
);
1283 /** Process new bytes that have arrived on conn-\>inbuf.
1285 * This function just passes conn to the connection-specific
1286 * connection_*_process_inbuf() function. It also passes in
1287 * package_partial if wanted.
1289 static int connection_process_inbuf(connection_t
*conn
, int package_partial
) {
1293 switch (conn
->type
) {
1295 return connection_or_process_inbuf(conn
);
1296 case CONN_TYPE_EXIT
:
1298 return connection_edge_process_inbuf(conn
, package_partial
);
1300 return connection_dir_process_inbuf(conn
);
1301 case CONN_TYPE_DNSWORKER
:
1302 return connection_dns_process_inbuf(conn
);
1303 case CONN_TYPE_CPUWORKER
:
1304 return connection_cpu_process_inbuf(conn
);
1305 case CONN_TYPE_CONTROL
:
1306 return connection_control_process_inbuf(conn
);
1308 log_fn(LOG_WARN
,"got unexpected conn type %d.", conn
->type
);
1313 /** We just finished flushing bytes from conn-\>outbuf, and there
1314 * are no more bytes remaining.
1316 * This function just passes conn to the connection-specific
1317 * connection_*_finished_flushing() function.
1319 static int connection_finished_flushing(connection_t
*conn
) {
1323 // log_fn(LOG_DEBUG,"entered. Socket %u.", conn->s);
1325 switch (conn
->type
) {
1327 return connection_or_finished_flushing(conn
);
1329 case CONN_TYPE_EXIT
:
1330 return connection_edge_finished_flushing(conn
);
1332 return connection_dir_finished_flushing(conn
);
1333 case CONN_TYPE_DNSWORKER
:
1334 return connection_dns_finished_flushing(conn
);
1335 case CONN_TYPE_CPUWORKER
:
1336 return connection_cpu_finished_flushing(conn
);
1337 case CONN_TYPE_CONTROL
:
1338 return connection_control_finished_flushing(conn
);
1340 log_fn(LOG_WARN
,"got unexpected conn type %d.", conn
->type
);
1345 /** Called when our attempt to connect() to another server has just
1348 * This function just passes conn to the connection-specific
1349 * connection_*_finished_connecting() function.
1351 static int connection_finished_connecting(connection_t
*conn
)
1357 return connection_or_finished_connecting(conn
);
1358 case CONN_TYPE_EXIT
:
1359 return connection_edge_finished_connecting(conn
);
1361 return connection_dir_finished_connecting(conn
);
1363 log_fn(LOG_WARN
,"got unexpected conn type %d.", conn
->type
);
1368 static int connection_reached_eof(connection_t
*conn
)
1370 switch (conn
->type
) {
1372 return connection_or_reached_eof(conn
);
1374 case CONN_TYPE_EXIT
:
1375 return connection_edge_reached_eof(conn
);
1377 return connection_dir_reached_eof(conn
);
1378 case CONN_TYPE_DNSWORKER
:
1379 return connection_dns_reached_eof(conn
);
1380 case CONN_TYPE_CPUWORKER
:
1381 return connection_cpu_reached_eof(conn
);
1382 case CONN_TYPE_CONTROL
:
1383 return connection_control_reached_eof(conn
);
1385 log_fn(LOG_WARN
,"got unexpected conn type %d.", conn
->type
);
1390 /** Verify that connection <b>conn</b> has all of its invariants
1391 * correct. Trigger an assert if anything is invalid.
1393 void assert_connection_ok(connection_t
*conn
, time_t now
)
1396 tor_assert(conn
->magic
== CONNECTION_MAGIC
);
1397 tor_assert(conn
->type
>= _CONN_TYPE_MIN
);
1398 tor_assert(conn
->type
<= _CONN_TYPE_MAX
);
1400 if (conn
->outbuf_flushlen
> 0) {
1401 tor_assert(connection_is_writing(conn
) || conn
->wants_to_write
);
1404 if (conn
->hold_open_until_flushed
)
1405 tor_assert(conn
->marked_for_close
);
1407 /* XXX check: wants_to_read, wants_to_write, s, poll_index,
1408 * marked_for_close. */
1411 if (!connection_is_listener(conn
)) {
1412 assert_buf_ok(conn
->inbuf
);
1413 assert_buf_ok(conn
->outbuf
);
1416 #if 0 /* computers often go back in time; no way to know */
1417 tor_assert(!now
|| conn
->timestamp_lastread
<= now
);
1418 tor_assert(!now
|| conn
->timestamp_lastwritten
<= now
);
1419 tor_assert(conn
->timestamp_created
<= conn
->timestamp_lastread
);
1420 tor_assert(conn
->timestamp_created
<= conn
->timestamp_lastwritten
);
1423 /* XXX Fix this; no longer so.*/
1425 if (conn
->type
!= CONN_TYPE_OR
&& conn
->type
!= CONN_TYPE_DIR
)
1426 tor_assert(!conn
->pkey
);
1427 /* pkey is set if we're a dir client, or if we're an OR in state OPEN
1428 * connected to another OR.
1432 if (conn
->type
!= CONN_TYPE_OR
) {
1433 tor_assert(!conn
->tls
);
1435 if (conn
->state
== OR_CONN_STATE_OPEN
) {
1436 /* tor_assert(conn->bandwidth > 0); */
1437 /* the above isn't necessarily true: if we just did a TLS
1438 * handshake but we didn't recognize the other peer, or it
1439 * gave a bad cert/etc, then we won't have assigned bandwidth,
1440 * yet it will be open. -RD
1442 tor_assert(conn
->receiver_bucket
>= 0);
1444 tor_assert(conn
->addr
&& conn
->port
);
1445 tor_assert(conn
->address
);
1446 if (conn
->state
!= OR_CONN_STATE_CONNECTING
)
1447 tor_assert(conn
->tls
);
1450 if (conn
->type
!= CONN_TYPE_EXIT
&& conn
->type
!= CONN_TYPE_AP
) {
1451 tor_assert(!conn
->stream_id
);
1452 tor_assert(!conn
->next_stream
);
1453 tor_assert(!conn
->cpath_layer
);
1454 tor_assert(!conn
->package_window
);
1455 tor_assert(!conn
->deliver_window
);
1456 tor_assert(!conn
->done_sending
);
1457 tor_assert(!conn
->done_receiving
);
1459 /* XXX unchecked: package window, deliver window. */
1461 if (conn
->type
== CONN_TYPE_AP
) {
1462 tor_assert(conn
->socks_request
);
1463 if (conn
->state
== AP_CONN_STATE_OPEN
) {
1464 tor_assert(conn
->socks_request
->has_finished
);
1465 tor_assert(conn
->cpath_layer
);
1466 assert_cpath_layer_ok(conn
->cpath_layer
);
1469 tor_assert(!conn
->socks_request
);
1471 if (conn
->type
== CONN_TYPE_EXIT
) {
1472 tor_assert(conn
->purpose
== EXIT_PURPOSE_CONNECT
||
1473 conn
->purpose
== EXIT_PURPOSE_RESOLVE
);
1474 } else if (conn
->type
!= CONN_TYPE_DIR
) {
1475 tor_assert(!conn
->purpose
); /* only used for dir types currently */
1480 case CONN_TYPE_OR_LISTENER
:
1481 case CONN_TYPE_AP_LISTENER
:
1482 case CONN_TYPE_DIR_LISTENER
:
1483 case CONN_TYPE_CONTROL_LISTENER
:
1484 tor_assert(conn
->state
== LISTENER_STATE_READY
);
1487 tor_assert(conn
->state
>= _OR_CONN_STATE_MIN
);
1488 tor_assert(conn
->state
<= _OR_CONN_STATE_MAX
);
1490 case CONN_TYPE_EXIT
:
1491 tor_assert(conn
->state
>= _EXIT_CONN_STATE_MIN
);
1492 tor_assert(conn
->state
<= _EXIT_CONN_STATE_MAX
);
1495 tor_assert(conn
->state
>= _AP_CONN_STATE_MIN
);
1496 tor_assert(conn
->state
<= _AP_CONN_STATE_MAX
);
1497 tor_assert(conn
->socks_request
);
1500 tor_assert(conn
->state
>= _DIR_CONN_STATE_MIN
);
1501 tor_assert(conn
->state
<= _DIR_CONN_STATE_MAX
);
1502 tor_assert(conn
->purpose
>= _DIR_PURPOSE_MIN
);
1503 tor_assert(conn
->purpose
<= _DIR_PURPOSE_MAX
);
1505 case CONN_TYPE_DNSWORKER
:
1506 tor_assert(conn
->state
== DNSWORKER_STATE_IDLE
||
1507 conn
->state
== DNSWORKER_STATE_BUSY
);
1509 case CONN_TYPE_CPUWORKER
:
1510 tor_assert(conn
->state
>= _CPUWORKER_STATE_MIN
);
1511 tor_assert(conn
->state
<= _CPUWORKER_STATE_MAX
);
1513 case CONN_TYPE_CONTROL
:
1514 tor_assert(conn
->state
>= _CONTROL_CONN_STATE_MIN
);
1515 tor_assert(conn
->state
<= _CONTROL_CONN_STATE_MAX
);