1 /* Copyright (c) 2001-2004, Roger Dingledine.
2 * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
3 * Copyright (c) 2007-2009, The Tor Project, Inc. */
4 /* See LICENSE for licensing information */
7 #if defined(EXPORTMALLINFO) && defined(HAVE_MALLOC_H) && defined(HAVE_MALLINFO)
15 * \brief Code to send and fetch directories and router
16 * descriptors via HTTP. Directories use dirserv.c to generate the
17 * results; clients use routers.c to parse them.
20 /* In-points to directory.c:
22 * - directory_post_to_dirservers(), called from
23 * router_upload_dir_desc_to_dirservers() in router.c
24 * upload_service_descriptor() in rendservice.c
25 * - directory_get_from_dirserver(), called from
26 * rend_client_refetch_renddesc() in rendclient.c
27 * run_scheduled_events() in main.c
29 * - connection_dir_process_inbuf(), called from
30 * connection_process_inbuf() in connection.c
31 * - connection_dir_finished_flushing(), called from
32 * connection_finished_flushing() in connection.c
33 * - connection_dir_finished_connecting(), called from
34 * connection_finished_connecting() in connection.c
36 static void directory_send_command(dir_connection_t
*conn
,
37 int purpose
, int direct
, const char *resource
,
38 const char *payload
, size_t payload_len
,
39 int supports_conditional_consensus
,
40 time_t if_modified_since
);
41 static int directory_handle_command(dir_connection_t
*conn
);
42 static int body_is_plausible(const char *body
, size_t body_len
, int purpose
);
43 static int purpose_needs_anonymity(uint8_t dir_purpose
,
44 uint8_t router_purpose
);
45 static char *http_get_header(const char *headers
, const char *which
);
46 static void http_set_address_origin(const char *headers
, connection_t
*conn
);
47 static void connection_dir_download_networkstatus_failed(
48 dir_connection_t
*conn
, int status_code
);
49 static void connection_dir_download_routerdesc_failed(dir_connection_t
*conn
);
50 static void connection_dir_download_cert_failed(
51 dir_connection_t
*conn
, int status_code
);
52 static void dir_networkstatus_download_failed(smartlist_t
*failed
,
54 static void dir_routerdesc_download_failed(smartlist_t
*failed
,
58 int was_descriptor_digests
);
59 static void note_client_request(int purpose
, int compressed
, size_t bytes
);
60 static int client_likes_consensus(networkstatus_t
*v
, const char *want_url
);
62 static void directory_initiate_command_rend(const char *address
,
63 const tor_addr_t
*addr
,
66 int supports_conditional_consensus
,
67 int supports_begindir
,
70 uint8_t router_purpose
,
71 int anonymized_connection
,
75 time_t if_modified_since
,
76 const rend_data_t
*rend_query
);
78 /********* START VARIABLES **********/
80 /** How far in the future do we allow a directory server to tell us it is
81 * before deciding that one of us has the wrong time? */
82 #define ALLOW_DIRECTORY_TIME_SKEW (30*60)
84 #define X_ADDRESS_HEADER "X-Your-Address-Is: "
86 /** HTTP cache control: how long do we tell proxies they can cache each
87 * kind of document we serve? */
88 #define FULL_DIR_CACHE_LIFETIME (60*60)
89 #define RUNNINGROUTERS_CACHE_LIFETIME (20*60)
90 #define DIRPORTFRONTPAGE_CACHE_LIFETIME (20*60)
91 #define NETWORKSTATUS_CACHE_LIFETIME (5*60)
92 #define ROUTERDESC_CACHE_LIFETIME (30*60)
93 #define ROUTERDESC_BY_DIGEST_CACHE_LIFETIME (48*60*60)
94 #define ROBOTS_CACHE_LIFETIME (24*60*60)
96 /********* END VARIABLES ************/
98 /** Return true iff the directory purpose 'purpose' must use an
99 * anonymous connection to a directory. */
101 purpose_needs_anonymity(uint8_t dir_purpose
, uint8_t router_purpose
)
103 if (get_options()->AllDirActionsPrivate
)
105 if (router_purpose
== ROUTER_PURPOSE_BRIDGE
&& has_completed_circuit
)
106 return 1; /* if no circuits yet, we may need this info to bootstrap. */
107 if (dir_purpose
== DIR_PURPOSE_UPLOAD_DIR
||
108 dir_purpose
== DIR_PURPOSE_UPLOAD_VOTE
||
109 dir_purpose
== DIR_PURPOSE_UPLOAD_SIGNATURES
||
110 dir_purpose
== DIR_PURPOSE_FETCH_V2_NETWORKSTATUS
||
111 dir_purpose
== DIR_PURPOSE_FETCH_STATUS_VOTE
||
112 dir_purpose
== DIR_PURPOSE_FETCH_DETACHED_SIGNATURES
||
113 dir_purpose
== DIR_PURPOSE_FETCH_CONSENSUS
||
114 dir_purpose
== DIR_PURPOSE_FETCH_CERTIFICATE
||
115 dir_purpose
== DIR_PURPOSE_FETCH_SERVERDESC
||
116 dir_purpose
== DIR_PURPOSE_FETCH_EXTRAINFO
)
121 /** Return a newly allocated string describing <b>auth</b>. */
123 authority_type_to_string(authority_type_t auth
)
126 smartlist_t
*lst
= smartlist_create();
127 if (auth
& V1_AUTHORITY
)
128 smartlist_add(lst
, (void*)"V1");
129 if (auth
& V2_AUTHORITY
)
130 smartlist_add(lst
, (void*)"V2");
131 if (auth
& BRIDGE_AUTHORITY
)
132 smartlist_add(lst
, (void*)"Bridge");
133 if (auth
& HIDSERV_AUTHORITY
)
134 smartlist_add(lst
, (void*)"Hidden service");
135 if (smartlist_len(lst
)) {
136 result
= smartlist_join_strings(lst
, ", ", 0, NULL
);
138 result
= tor_strdup("[Not an authority]");
144 /** Return a string describing a given directory connection purpose. */
146 dir_conn_purpose_to_string(int purpose
)
150 case DIR_PURPOSE_FETCH_RENDDESC
:
151 return "hidden-service descriptor fetch";
152 case DIR_PURPOSE_UPLOAD_DIR
:
153 return "server descriptor upload";
154 case DIR_PURPOSE_UPLOAD_RENDDESC
:
155 return "hidden-service descriptor upload";
156 case DIR_PURPOSE_UPLOAD_VOTE
:
157 return "server vote upload";
158 case DIR_PURPOSE_UPLOAD_SIGNATURES
:
159 return "consensus signature upload";
160 case DIR_PURPOSE_FETCH_V2_NETWORKSTATUS
:
161 return "network-status fetch";
162 case DIR_PURPOSE_FETCH_SERVERDESC
:
163 return "server descriptor fetch";
164 case DIR_PURPOSE_FETCH_EXTRAINFO
:
165 return "extra-info fetch";
166 case DIR_PURPOSE_FETCH_CONSENSUS
:
167 return "consensus network-status fetch";
168 case DIR_PURPOSE_FETCH_CERTIFICATE
:
169 return "authority cert fetch";
170 case DIR_PURPOSE_FETCH_STATUS_VOTE
:
171 return "status vote fetch";
172 case DIR_PURPOSE_FETCH_DETACHED_SIGNATURES
:
173 return "consensus signature fetch";
174 case DIR_PURPOSE_FETCH_RENDDESC_V2
:
175 return "hidden-service v2 descriptor fetch";
176 case DIR_PURPOSE_UPLOAD_RENDDESC_V2
:
177 return "hidden-service v2 descriptor upload";
180 log_warn(LD_BUG
, "Called with unknown purpose %d", purpose
);
184 /** Return true iff <b>identity_digest</b> is the digest of a router we
185 * believe to support extrainfo downloads. (If <b>is_authority</b> we do
186 * additional checking that's only valid for authorities.) */
188 router_supports_extrainfo(const char *identity_digest
, int is_authority
)
190 routerinfo_t
*ri
= router_get_by_digest(identity_digest
);
193 if (ri
->caches_extra_info
)
195 if (is_authority
&& ri
->platform
&&
196 tor_version_as_new_as(ri
->platform
, "Tor 0.2.0.0-alpha-dev (r10070)"))
200 routerstatus_t
*rs
= router_get_consensus_status_by_id(identity_digest
);
201 if (rs
&& rs
->version_supports_extrainfo_upload
)
207 /** Return true iff any trusted directory authority has accepted our
210 * We consider any authority sufficient because waiting for all of
211 * them means it never happens while any authority is down; we don't
212 * go for something more complex in the middle (like \>1/3 or \>1/2 or
213 * \>=1/2) because that doesn't seem necessary yet.
216 directories_have_accepted_server_descriptor(void)
218 smartlist_t
*servers
= router_get_trusted_dir_servers();
219 or_options_t
*options
= get_options();
220 SMARTLIST_FOREACH(servers
, trusted_dir_server_t
*, d
, {
221 if ((d
->type
& options
->_PublishServerDescriptor
) &&
222 d
->has_accepted_serverdesc
) {
229 /** Start a connection to every suitable directory authority, using
230 * connection purpose 'purpose' and uploading the payload 'payload'
231 * (length 'payload_len'). The purpose should be one of
232 * 'DIR_PURPOSE_UPLOAD_DIR' or 'DIR_PURPOSE_UPLOAD_RENDDESC'.
234 * <b>type</b> specifies what sort of dir authorities (V1, V2,
235 * HIDSERV, BRIDGE) we should upload to.
237 * If <b>extrainfo_len</b> is nonzero, the first <b>payload_len</b> bytes of
238 * <b>payload</b> hold a router descriptor, and the next <b>extrainfo_len</b>
239 * bytes of <b>payload</b> hold an extra-info document. Upload the descriptor
240 * to all authorities, and the extra-info document to all authorities that
244 directory_post_to_dirservers(uint8_t dir_purpose
, uint8_t router_purpose
,
245 authority_type_t type
,
247 size_t payload_len
, size_t extrainfo_len
)
250 smartlist_t
*dirservers
= router_get_trusted_dir_servers();
252 tor_assert(dirservers
);
253 /* This tries dirservers which we believe to be down, but ultimately, that's
254 * harmless, and we may as well err on the side of getting things uploaded.
256 SMARTLIST_FOREACH_BEGIN(dirservers
, trusted_dir_server_t
*, ds
) {
257 routerstatus_t
*rs
= &(ds
->fake_status
);
258 size_t upload_len
= payload_len
;
261 if ((type
& ds
->type
) == 0)
264 found
= 1; /* at least one authority of this type was listed */
265 if (dir_purpose
== DIR_PURPOSE_UPLOAD_DIR
)
266 ds
->has_accepted_serverdesc
= 0;
268 if (extrainfo_len
&& router_supports_extrainfo(ds
->digest
, 1)) {
269 upload_len
+= extrainfo_len
;
270 log_info(LD_DIR
, "Uploading an extrainfo too (length %d)",
271 (int) extrainfo_len
);
273 tor_addr_from_ipv4h(&ds_addr
, ds
->addr
);
274 post_via_tor
= purpose_needs_anonymity(dir_purpose
, router_purpose
) ||
275 !fascist_firewall_allows_address_dir(&ds_addr
, ds
->dir_port
);
276 directory_initiate_command_routerstatus(rs
, dir_purpose
,
279 NULL
, payload
, upload_len
, 0);
280 } SMARTLIST_FOREACH_END(ds
);
282 char *s
= authority_type_to_string(type
);
283 log_warn(LD_DIR
, "Publishing server descriptor to directory authorities "
284 "of type '%s', but no authorities of that type listed!", s
);
289 /** Start a connection to a random running directory server, using
290 * connection purpose <b>dir_purpose</b>, intending to fetch descriptors
291 * of purpose <b>router_purpose</b>, and requesting <b>resource</b>.
292 * Use <b>pds_flags</b> as arguments to router_pick_directory_server()
293 * or router_pick_trusteddirserver().
296 directory_get_from_dirserver(uint8_t dir_purpose
, uint8_t router_purpose
,
297 const char *resource
, int pds_flags
)
299 routerstatus_t
*rs
= NULL
;
300 or_options_t
*options
= get_options();
301 int prefer_authority
= directory_fetches_from_authorities(options
);
302 int get_via_tor
= purpose_needs_anonymity(dir_purpose
, router_purpose
);
303 authority_type_t type
;
304 time_t if_modified_since
= 0;
306 /* FFFF we could break this switch into its own function, and call
307 * it elsewhere in directory.c. -RD */
308 switch (dir_purpose
) {
309 case DIR_PURPOSE_FETCH_EXTRAINFO
:
310 type
= EXTRAINFO_CACHE
|
311 (router_purpose
== ROUTER_PURPOSE_BRIDGE
? BRIDGE_AUTHORITY
:
314 case DIR_PURPOSE_FETCH_V2_NETWORKSTATUS
:
315 case DIR_PURPOSE_FETCH_SERVERDESC
:
316 type
= (router_purpose
== ROUTER_PURPOSE_BRIDGE
? BRIDGE_AUTHORITY
:
319 case DIR_PURPOSE_FETCH_RENDDESC
:
320 type
= HIDSERV_AUTHORITY
;
322 case DIR_PURPOSE_FETCH_STATUS_VOTE
:
323 case DIR_PURPOSE_FETCH_DETACHED_SIGNATURES
:
326 case DIR_PURPOSE_FETCH_CONSENSUS
:
327 case DIR_PURPOSE_FETCH_CERTIFICATE
:
331 log_warn(LD_BUG
, "Unexpected purpose %d", (int)dir_purpose
);
335 if (DIR_PURPOSE_FETCH_CONSENSUS
) {
336 networkstatus_t
*v
= networkstatus_get_latest_consensus();
338 if_modified_since
= v
->valid_after
+ 180;
341 if (!options
->FetchServerDescriptors
&& type
!= HIDSERV_AUTHORITY
)
345 if (options
->UseBridges
&& type
!= BRIDGE_AUTHORITY
) {
346 /* want to ask a running bridge for which we have a descriptor. */
347 /* XXX022 we assume that all of our bridges can answer any
348 * possible directory question. This won't be true forever. -RD */
349 /* It certainly is not true with conditional consensus downloading,
350 * so, for now, never assume the server supports that. */
351 routerinfo_t
*ri
= choose_random_entry(NULL
);
354 tor_addr_from_ipv4h(&addr
, ri
->addr
);
355 directory_initiate_command(ri
->address
, &addr
,
357 0, /* don't use conditional consensus url */
358 1, ri
->cache_info
.identity_digest
,
361 0, resource
, NULL
, 0, if_modified_since
);
363 log_notice(LD_DIR
, "Ignoring directory request, since no bridge "
364 "nodes are available yet.");
367 if (prefer_authority
|| type
== BRIDGE_AUTHORITY
) {
368 /* only ask authdirservers, and don't ask myself */
369 rs
= router_pick_trusteddirserver(type
, pds_flags
);
370 if (rs
== NULL
&& (pds_flags
& PDS_NO_EXISTING_SERVERDESC_FETCH
)) {
371 /* We don't want to fetch from any authorities that we're currently
372 * fetching server descriptors from, and we got no match. Did we
373 * get no match because all the authorities have connections
374 * fetching server descriptors (in which case we should just
375 * return,) or because all the authorities are down or on fire or
376 * unreachable or something (in which case we should go on with
377 * our fallback code)? */
378 pds_flags
&= ~PDS_NO_EXISTING_SERVERDESC_FETCH
;
379 rs
= router_pick_trusteddirserver(type
, pds_flags
);
381 log_debug(LD_DIR
, "Deferring serverdesc fetch: all authorities "
387 if (!rs
&& type
!= BRIDGE_AUTHORITY
) {
388 /* anybody with a non-zero dirport will do */
389 rs
= router_pick_directory_server(type
, pds_flags
);
391 log_info(LD_DIR
, "No router found for %s; falling back to "
392 "dirserver list.", dir_conn_purpose_to_string(dir_purpose
));
393 rs
= router_pick_trusteddirserver(type
, pds_flags
);
395 get_via_tor
= 1; /* last resort: try routing it via Tor */
399 } else { /* get_via_tor */
400 /* Never use fascistfirewall; we're going via Tor. */
401 if (dir_purpose
== DIR_PURPOSE_FETCH_RENDDESC
) {
402 /* only ask hidserv authorities, any of them will do */
403 pds_flags
|= PDS_IGNORE_FASCISTFIREWALL
|PDS_ALLOW_SELF
;
404 rs
= router_pick_trusteddirserver(HIDSERV_AUTHORITY
, pds_flags
);
406 /* anybody with a non-zero dirport will do. Disregard firewalls. */
407 pds_flags
|= PDS_IGNORE_FASCISTFIREWALL
;
408 rs
= router_pick_directory_server(type
, pds_flags
);
409 /* If we have any hope of building an indirect conn, we know some router
410 * descriptors. If (rs==NULL), we can't build circuits anyway, so
411 * there's no point in falling back to the authorities in this case. */
416 directory_initiate_command_routerstatus(rs
, dir_purpose
,
423 "While fetching directory info, "
424 "no running dirservers known. Will try again later. "
425 "(purpose %d)", dir_purpose
);
426 if (!purpose_needs_anonymity(dir_purpose
, router_purpose
)) {
427 /* remember we tried them all and failed. */
428 directory_all_unreachable(time(NULL
));
433 /** As directory_get_from_dirserver, but initiates a request to <i>every</i>
434 * directory authority other than ourself. Only for use by authorities when
435 * searching for missing information while voting. */
437 directory_get_from_all_authorities(uint8_t dir_purpose
,
438 uint8_t router_purpose
,
439 const char *resource
)
441 tor_assert(dir_purpose
== DIR_PURPOSE_FETCH_STATUS_VOTE
||
442 dir_purpose
== DIR_PURPOSE_FETCH_DETACHED_SIGNATURES
);
444 SMARTLIST_FOREACH(router_get_trusted_dir_servers(),
445 trusted_dir_server_t
*, ds
,
448 if (router_digest_is_me(ds
->digest
))
450 if (!(ds
->type
& V3_AUTHORITY
))
452 rs
= &ds
->fake_status
;
453 directory_initiate_command_routerstatus(rs
, dir_purpose
, router_purpose
,
454 0, resource
, NULL
, 0, 0);
458 /** Same as directory_initiate_command_routerstatus(), but accepts
459 * rendezvous data to fetch a hidden service descriptor. */
461 directory_initiate_command_routerstatus_rend(routerstatus_t
*status
,
463 uint8_t router_purpose
,
464 int anonymized_connection
,
465 const char *resource
,
468 time_t if_modified_since
,
469 const rend_data_t
*rend_query
)
471 routerinfo_t
*router
;
472 char address_buf
[INET_NTOA_BUF_LEN
+1];
476 router
= router_get_by_digest(status
->identity_digest
);
477 if (!router
&& anonymized_connection
) {
478 log_info(LD_DIR
, "Not sending anonymized request to directory '%s'; we "
479 "don't have its router descriptor.", status
->nickname
);
482 address
= router
->address
;
484 in
.s_addr
= htonl(status
->addr
);
485 tor_inet_ntoa(&in
, address_buf
, sizeof(address_buf
));
486 address
= address_buf
;
488 tor_addr_from_ipv4h(&addr
, status
->addr
);
489 directory_initiate_command_rend(address
, &addr
,
490 status
->or_port
, status
->dir_port
,
491 status
->version_supports_conditional_consensus
,
492 status
->version_supports_begindir
,
493 status
->identity_digest
,
494 dir_purpose
, router_purpose
,
495 anonymized_connection
, resource
,
496 payload
, payload_len
, if_modified_since
,
500 /** Launch a new connection to the directory server <b>status</b> to
501 * upload or download a server or rendezvous
502 * descriptor. <b>dir_purpose</b> determines what
503 * kind of directory connection we're launching, and must be one of
504 * DIR_PURPOSE_{FETCH|UPLOAD}_{DIR|RENDDESC|RENDDESC_V2}. <b>router_purpose</b>
505 * specifies the descriptor purposes we have in mind (currently only
506 * used for FETCH_DIR).
508 * When uploading, <b>payload</b> and <b>payload_len</b> determine the content
509 * of the HTTP post. Otherwise, <b>payload</b> should be NULL.
511 * When fetching a rendezvous descriptor, <b>resource</b> is the service ID we
515 directory_initiate_command_routerstatus(routerstatus_t
*status
,
517 uint8_t router_purpose
,
518 int anonymized_connection
,
519 const char *resource
,
522 time_t if_modified_since
)
524 directory_initiate_command_routerstatus_rend(status
, dir_purpose
,
526 anonymized_connection
, resource
,
527 payload
, payload_len
,
528 if_modified_since
, NULL
);
531 /** Return true iff <b>conn</b> is the client side of a directory connection
532 * we launched to ourself in order to determine the reachability of our
535 directory_conn_is_self_reachability_test(dir_connection_t
*conn
)
537 if (conn
->requested_resource
&&
538 !strcmpstart(conn
->requested_resource
,"authority")) {
539 routerinfo_t
*me
= router_get_my_routerinfo();
541 router_digest_is_me(conn
->identity_digest
) &&
542 tor_addr_eq_ipv4h(&conn
->_base
.addr
, me
->addr
) && /*XXXX prop 118*/
543 me
->dir_port
== conn
->_base
.port
)
549 /** Called when we are unable to complete the client's request to a directory
550 * server due to a network error: Mark the router as down and try again if
554 connection_dir_request_failed(dir_connection_t
*conn
)
556 if (directory_conn_is_self_reachability_test(conn
)) {
557 routerinfo_t
*me
= router_get_my_routerinfo();
559 control_event_server_status(LOG_WARN
,
560 "REACHABILITY_FAILED DIRADDRESS=%s:%d",
561 me
->address
, me
->dir_port
);
562 return; /* this was a test fetch. don't retry. */
564 if (entry_list_can_grow(get_options()))
565 router_set_status(conn
->identity_digest
, 0); /* don't try him again */
566 if (conn
->_base
.purpose
== DIR_PURPOSE_FETCH_V2_NETWORKSTATUS
) {
567 log_info(LD_DIR
, "Giving up on directory server at '%s'; retrying",
568 conn
->_base
.address
);
569 connection_dir_download_networkstatus_failed(conn
, -1);
570 } else if (conn
->_base
.purpose
== DIR_PURPOSE_FETCH_SERVERDESC
||
571 conn
->_base
.purpose
== DIR_PURPOSE_FETCH_EXTRAINFO
) {
572 log_info(LD_DIR
, "Giving up on directory server at '%s'; retrying",
573 conn
->_base
.address
);
574 connection_dir_download_routerdesc_failed(conn
);
575 } else if (conn
->_base
.purpose
== DIR_PURPOSE_FETCH_CONSENSUS
) {
576 networkstatus_consensus_download_failed(0);
577 } else if (conn
->_base
.purpose
== DIR_PURPOSE_FETCH_CERTIFICATE
) {
578 log_info(LD_DIR
, "Giving up on directory server at '%s'; retrying",
579 conn
->_base
.address
);
580 connection_dir_download_cert_failed(conn
, 0);
581 } else if (conn
->_base
.purpose
== DIR_PURPOSE_FETCH_DETACHED_SIGNATURES
) {
582 log_info(LD_DIR
, "Giving up downloading detached signatures from '%s'",
583 conn
->_base
.address
);
584 } else if (conn
->_base
.purpose
== DIR_PURPOSE_FETCH_STATUS_VOTE
) {
585 log_info(LD_DIR
, "Giving up downloading votes from '%s'",
586 conn
->_base
.address
);
590 /** Called when an attempt to download one or more network status
591 * documents on connection <b>conn</b> failed. Decide whether to
592 * retry the fetch now, later, or never.
595 connection_dir_download_networkstatus_failed(dir_connection_t
*conn
,
598 if (!conn
->requested_resource
) {
599 /* We never reached directory_send_command, which means that we never
600 * opened a network connection. Either we're out of sockets, or the
601 * network is down. Either way, retrying would be pointless. */
604 if (!strcmpstart(conn
->requested_resource
, "all")) {
605 /* We're a non-authoritative directory cache; try again. Ignore status
606 * code, since we don't want to keep trying forever in a tight loop
607 * if all the authorities are shutting us out. */
608 smartlist_t
*trusted_dirs
= router_get_trusted_dir_servers();
609 SMARTLIST_FOREACH(trusted_dirs
, trusted_dir_server_t
*, ds
,
610 download_status_failed(&ds
->v2_ns_dl_status
, 0));
611 directory_get_from_dirserver(conn
->_base
.purpose
, conn
->router_purpose
,
612 "all.z", 0 /* don't retry_if_no_servers */);
613 } else if (!strcmpstart(conn
->requested_resource
, "fp/")) {
614 /* We were trying to download by fingerprint; mark them all as having
615 * failed, and possibly retry them later.*/
616 smartlist_t
*failed
= smartlist_create();
617 dir_split_resource_into_fingerprints(conn
->requested_resource
+3,
619 if (smartlist_len(failed
)) {
620 dir_networkstatus_download_failed(failed
, status_code
);
621 SMARTLIST_FOREACH(failed
, char *, cp
, tor_free(cp
));
623 smartlist_free(failed
);
627 /** Called when an attempt to download one or more router descriptors
628 * or extra-info documents on connection <b>conn</b> failed.
631 connection_dir_download_routerdesc_failed(dir_connection_t
*conn
)
633 /* No need to increment the failure count for routerdescs, since
634 * it's not their fault. */
636 /* No need to relaunch descriptor downloads here: we already do it
637 * every 10 or 60 seconds (FOO_DESCRIPTOR_RETRY_INTERVAL) in main.c. */
638 tor_assert(conn
->_base
.purpose
== DIR_PURPOSE_FETCH_SERVERDESC
||
639 conn
->_base
.purpose
== DIR_PURPOSE_FETCH_EXTRAINFO
);
644 /** Called when an attempt to fetch a certificate fails. */
646 connection_dir_download_cert_failed(dir_connection_t
*conn
, int status
)
649 tor_assert(conn
->_base
.purpose
== DIR_PURPOSE_FETCH_CERTIFICATE
);
651 if (!conn
->requested_resource
)
653 failed
= smartlist_create();
654 dir_split_resource_into_fingerprints(conn
->requested_resource
+3,
656 SMARTLIST_FOREACH(failed
, char *, cp
,
658 authority_cert_dl_failed(cp
, status
);
661 smartlist_free(failed
);
663 update_certificate_downloads(time(NULL
));
666 /** Evaluate the situation and decide if we should use an encrypted
667 * "begindir-style" connection for this directory request.
668 * 1) If or_port is 0, or it's a direct conn and or_port is firewalled
669 * or we're a dir mirror, no.
670 * 2) If we prefer to avoid begindir conns, and we're not fetching or
671 * publishing a bridge relay descriptor, no.
675 directory_command_should_use_begindir(or_options_t
*options
,
676 const tor_addr_t
*addr
,
677 int or_port
, uint8_t router_purpose
,
678 int anonymized_connection
)
681 return 0; /* We don't know an ORPort -- no chance. */
682 if (!anonymized_connection
)
683 if (!fascist_firewall_allows_address_or(addr
, or_port
) ||
684 directory_fetches_from_authorities(options
) ||
685 (server_mode(options
) && !options
->Address
))
686 return 0; /* We're firewalled or are acting like a relay -- also no. */
687 if (!options
->TunnelDirConns
&&
688 router_purpose
!= ROUTER_PURPOSE_BRIDGE
)
689 return 0; /* We prefer to avoid using begindir conns. Fine. */
693 /** Helper for directory_initiate_command_routerstatus: send the
694 * command to a server whose address is <b>address</b>, whose IP is
695 * <b>addr</b>, whose directory port is <b>dir_port</b>, whose tor version
696 * <b>supports_begindir</b>, and whose identity key digest is
699 directory_initiate_command(const char *address
, const tor_addr_t
*_addr
,
700 uint16_t or_port
, uint16_t dir_port
,
701 int supports_conditional_consensus
,
702 int supports_begindir
, const char *digest
,
703 uint8_t dir_purpose
, uint8_t router_purpose
,
704 int anonymized_connection
, const char *resource
,
705 const char *payload
, size_t payload_len
,
706 time_t if_modified_since
)
708 directory_initiate_command_rend(address
, _addr
, or_port
, dir_port
,
709 supports_conditional_consensus
,
710 supports_begindir
, digest
, dir_purpose
,
711 router_purpose
, anonymized_connection
,
712 resource
, payload
, payload_len
,
713 if_modified_since
, NULL
);
716 /** Same as directory_initiate_command(), but accepts rendezvous data to
717 * fetch a hidden service descriptor. */
719 directory_initiate_command_rend(const char *address
, const tor_addr_t
*_addr
,
720 uint16_t or_port
, uint16_t dir_port
,
721 int supports_conditional_consensus
,
722 int supports_begindir
, const char *digest
,
723 uint8_t dir_purpose
, uint8_t router_purpose
,
724 int anonymized_connection
,
725 const char *resource
,
726 const char *payload
, size_t payload_len
,
727 time_t if_modified_since
,
728 const rend_data_t
*rend_query
)
730 dir_connection_t
*conn
;
731 or_options_t
*options
= get_options();
732 int socket_error
= 0;
733 int use_begindir
= supports_begindir
&&
734 directory_command_should_use_begindir(options
, _addr
,
735 or_port
, router_purpose
, anonymized_connection
);
740 tor_assert(or_port
|| dir_port
);
743 tor_addr_copy(&addr
, _addr
);
745 log_debug(LD_DIR
, "anonymized %d, use_begindir %d.",
746 anonymized_connection
, use_begindir
);
748 log_debug(LD_DIR
, "Initiating %s", dir_conn_purpose_to_string(dir_purpose
));
750 conn
= dir_connection_new(AF_INET
);
752 /* set up conn so it's got all the data we need to remember */
753 tor_addr_copy(&conn
->_base
.addr
, &addr
);
754 conn
->_base
.port
= use_begindir
? or_port
: dir_port
;
755 conn
->_base
.address
= tor_strdup(address
);
756 memcpy(conn
->identity_digest
, digest
, DIGEST_LEN
);
758 conn
->_base
.purpose
= dir_purpose
;
759 conn
->router_purpose
= router_purpose
;
761 /* give it an initial state */
762 conn
->_base
.state
= DIR_CONN_STATE_CONNECTING
;
764 /* decide whether we can learn our IP address from this conn */
765 conn
->dirconn_direct
= !anonymized_connection
;
767 /* copy rendezvous data, if any */
769 conn
->rend_data
= rend_data_dup(rend_query
);
771 if (!anonymized_connection
&& !use_begindir
) {
772 /* then we want to connect to dirport directly */
774 if (options
->HttpProxy
) {
775 tor_addr_from_ipv4h(&addr
, options
->HttpProxyAddr
);
776 dir_port
= options
->HttpProxyPort
;
779 switch (connection_connect(TO_CONN(conn
), conn
->_base
.address
, &addr
,
780 dir_port
, &socket_error
)) {
782 connection_dir_request_failed(conn
); /* retry if we want */
783 /* XXX we only pass 'conn' above, not 'resource', 'payload',
784 * etc. So in many situations it can't retry! -RD */
785 connection_free(TO_CONN(conn
));
788 /* start flushing conn */
789 conn
->_base
.state
= DIR_CONN_STATE_CLIENT_SENDING
;
792 /* queue the command on the outbuf */
793 directory_send_command(conn
, dir_purpose
, 1, resource
,
794 payload
, payload_len
,
795 supports_conditional_consensus
,
797 connection_watch_events(TO_CONN(conn
), EV_READ
| EV_WRITE
);
798 /* writable indicates finish, readable indicates broken link,
799 error indicates broken link in windowsland. */
801 } else { /* we want to connect via a tor connection */
802 edge_connection_t
*linked_conn
;
804 /* If it's an anonymized connection, remember the fact that we
805 * wanted it for later: maybe we'll want it again soon. */
806 if (anonymized_connection
&& use_begindir
)
807 rep_hist_note_used_internal(time(NULL
), 0, 1);
808 else if (anonymized_connection
&& !use_begindir
)
809 rep_hist_note_used_port(time(NULL
), conn
->_base
.port
);
811 /* make an AP connection
812 * populate it and add it at the right state
816 connection_ap_make_link(conn
->_base
.address
, conn
->_base
.port
,
817 digest
, use_begindir
, conn
->dirconn_direct
);
819 log_warn(LD_NET
,"Making tunnel to dirserver failed.");
820 connection_mark_for_close(TO_CONN(conn
));
823 connection_link_connections(TO_CONN(conn
), TO_CONN(linked_conn
));
825 if (connection_add(TO_CONN(conn
)) < 0) {
826 log_warn(LD_NET
,"Unable to add connection for link to dirserver.");
827 connection_mark_for_close(TO_CONN(conn
));
830 conn
->_base
.state
= DIR_CONN_STATE_CLIENT_SENDING
;
831 /* queue the command on the outbuf */
832 directory_send_command(conn
, dir_purpose
, 0, resource
,
833 payload
, payload_len
,
834 supports_conditional_consensus
,
836 connection_watch_events(TO_CONN(conn
), EV_READ
| EV_WRITE
);
837 connection_start_reading(TO_CONN(linked_conn
));
841 /** Return true iff anything we say on <b>conn</b> is being encrypted before
842 * we send it to the client/server. */
844 connection_dir_is_encrypted(dir_connection_t
*conn
)
846 /* Right now it's sufficient to see if conn is or has been linked, since
847 * the only thing it could be linked to is an edge connection on a
848 * circuit, and the only way it could have been unlinked is at the edge
849 * connection getting closed.
851 return TO_CONN(conn
)->linked
;
854 /** Helper for sorting
856 * sort strings alphabetically
859 _compare_strs(const void **a
, const void **b
)
861 const char *s1
= *a
, *s2
= *b
;
862 return strcmp(s1
, s2
);
865 #define CONDITIONAL_CONSENSUS_FPR_LEN 3
866 #if (CONDITIONAL_CONSENSUS_FPR_LEN > DIGEST_LEN)
867 #error "conditional consensus fingerprint length is larger than digest length"
870 /** Return the URL we should use for a consensus download.
872 * This url depends on whether or not the server we go to
873 * is sufficiently new to support conditional consensus downloading,
874 * i.e. GET .../consensus/<b>fpr</b>+<b>fpr</b>+<b>fpr</b>
877 directory_get_consensus_url(int supports_conditional_consensus
)
882 if (supports_conditional_consensus
) {
883 char *authority_id_list
;
884 smartlist_t
*authority_digets
= smartlist_create();
886 SMARTLIST_FOREACH(router_get_trusted_dir_servers(),
887 trusted_dir_server_t
*, ds
,
890 if (!(ds
->type
& V3_AUTHORITY
))
893 hex
= tor_malloc(2*CONDITIONAL_CONSENSUS_FPR_LEN
+1);
894 base16_encode(hex
, 2*CONDITIONAL_CONSENSUS_FPR_LEN
+1,
895 ds
->v3_identity_digest
, CONDITIONAL_CONSENSUS_FPR_LEN
);
896 smartlist_add(authority_digets
, hex
);
898 smartlist_sort(authority_digets
, _compare_strs
);
899 authority_id_list
= smartlist_join_strings(authority_digets
,
902 len
= strlen(authority_id_list
)+64;
903 url
= tor_malloc(len
);
904 tor_snprintf(url
, len
, "/tor/status-vote/current/consensus/%s.z",
907 SMARTLIST_FOREACH(authority_digets
, char *, cp
, tor_free(cp
));
908 smartlist_free(authority_digets
);
909 tor_free(authority_id_list
);
911 url
= tor_strdup("/tor/status-vote/current/consensus.z");
916 /** Queue an appropriate HTTP command on conn-\>outbuf. The other args
917 * are as in directory_initiate_command.
920 directory_send_command(dir_connection_t
*conn
,
921 int purpose
, int direct
, const char *resource
,
922 const char *payload
, size_t payload_len
,
923 int supports_conditional_consensus
,
924 time_t if_modified_since
)
926 char proxystring
[256];
927 char proxyauthstring
[256];
928 char hoststring
[128];
929 char imsstring
[RFC1123_TIME_LEN
+32];
932 const char *httpcommand
= NULL
;
936 tor_assert(conn
->_base
.type
== CONN_TYPE_DIR
);
938 tor_free(conn
->requested_resource
);
940 conn
->requested_resource
= tor_strdup(resource
);
942 /* come up with a string for which Host: we want */
943 if (conn
->_base
.port
== 80) {
944 strlcpy(hoststring
, conn
->_base
.address
, sizeof(hoststring
));
946 tor_snprintf(hoststring
, sizeof(hoststring
),"%s:%d",
947 conn
->_base
.address
, conn
->_base
.port
);
950 /* Format if-modified-since */
951 if (!if_modified_since
) {
954 char b
[RFC1123_TIME_LEN
+1];
955 format_rfc1123_time(b
, if_modified_since
);
956 tor_snprintf(imsstring
, sizeof(imsstring
), "\r\nIf-Modified-Since: %s", b
);
959 /* come up with some proxy lines, if we're using one. */
960 if (direct
&& get_options()->HttpProxy
) {
961 char *base64_authenticator
=NULL
;
962 const char *authenticator
= get_options()->HttpProxyAuthenticator
;
964 tor_snprintf(proxystring
, sizeof(proxystring
),"http://%s", hoststring
);
966 base64_authenticator
= alloc_http_authenticator(authenticator
);
967 if (!base64_authenticator
)
968 log_warn(LD_BUG
, "Encoding http authenticator failed");
970 if (base64_authenticator
) {
971 tor_snprintf(proxyauthstring
, sizeof(proxyauthstring
),
972 "\r\nProxy-Authorization: Basic %s",
973 base64_authenticator
);
974 tor_free(base64_authenticator
);
976 proxyauthstring
[0] = 0;
980 proxyauthstring
[0] = 0;
984 case DIR_PURPOSE_FETCH_V2_NETWORKSTATUS
:
985 tor_assert(resource
);
987 len
= strlen(resource
)+32;
988 url
= tor_malloc(len
);
989 tor_snprintf(url
, len
, "/tor/status/%s", resource
);
991 case DIR_PURPOSE_FETCH_CONSENSUS
:
992 tor_assert(!resource
);
993 tor_assert(!payload
);
995 url
= directory_get_consensus_url(supports_conditional_consensus
);
996 log_info(LD_DIR
, "Downloading consensus from %s using %s",
999 case DIR_PURPOSE_FETCH_CERTIFICATE
:
1000 tor_assert(resource
);
1001 tor_assert(!payload
);
1002 httpcommand
= "GET";
1003 len
= strlen(resource
)+32;
1004 url
= tor_malloc(len
);
1005 tor_snprintf(url
, len
, "/tor/keys/%s", resource
);
1007 case DIR_PURPOSE_FETCH_STATUS_VOTE
:
1008 tor_assert(resource
);
1009 tor_assert(!payload
);
1010 httpcommand
= "GET";
1011 len
= strlen(resource
)+32;
1012 url
= tor_malloc(len
);
1013 tor_snprintf(url
, len
, "/tor/status-vote/next/%s.z", resource
);
1015 case DIR_PURPOSE_FETCH_DETACHED_SIGNATURES
:
1016 tor_assert(!resource
);
1017 tor_assert(!payload
);
1018 httpcommand
= "GET";
1019 url
= tor_strdup("/tor/status-vote/next/consensus-signatures.z");
1021 case DIR_PURPOSE_FETCH_SERVERDESC
:
1022 tor_assert(resource
);
1023 httpcommand
= "GET";
1024 len
= strlen(resource
)+32;
1025 url
= tor_malloc(len
);
1026 tor_snprintf(url
, len
, "/tor/server/%s", resource
);
1028 case DIR_PURPOSE_FETCH_EXTRAINFO
:
1029 tor_assert(resource
);
1030 httpcommand
= "GET";
1031 len
= strlen(resource
)+32;
1032 url
= tor_malloc(len
);
1033 tor_snprintf(url
, len
, "/tor/extra/%s", resource
);
1035 case DIR_PURPOSE_UPLOAD_DIR
:
1036 tor_assert(!resource
);
1037 tor_assert(payload
);
1038 httpcommand
= "POST";
1039 url
= tor_strdup("/tor/");
1041 case DIR_PURPOSE_UPLOAD_VOTE
:
1042 tor_assert(!resource
);
1043 tor_assert(payload
);
1044 httpcommand
= "POST";
1045 url
= tor_strdup("/tor/post/vote");
1047 case DIR_PURPOSE_UPLOAD_SIGNATURES
:
1048 tor_assert(!resource
);
1049 tor_assert(payload
);
1050 httpcommand
= "POST";
1051 url
= tor_strdup("/tor/post/consensus-signature");
1053 case DIR_PURPOSE_FETCH_RENDDESC_V2
:
1054 tor_assert(resource
);
1055 tor_assert(strlen(resource
) <= REND_DESC_ID_V2_LEN_BASE32
);
1056 tor_assert(!payload
);
1057 httpcommand
= "GET";
1058 len
= strlen(resource
) + 32;
1059 url
= tor_malloc(len
);
1060 tor_snprintf(url
, len
, "/tor/rendezvous2/%s", resource
);
1062 case DIR_PURPOSE_UPLOAD_RENDDESC
:
1063 tor_assert(!resource
);
1064 tor_assert(payload
);
1065 httpcommand
= "POST";
1066 url
= tor_strdup("/tor/rendezvous/publish");
1068 case DIR_PURPOSE_UPLOAD_RENDDESC_V2
:
1069 tor_assert(!resource
);
1070 tor_assert(payload
);
1071 httpcommand
= "POST";
1072 url
= tor_strdup("/tor/rendezvous2/publish");
1079 if (strlen(proxystring
) + strlen(url
) >= 4096) {
1081 "Squid does not like URLs longer than 4095 bytes, and this "
1082 "one is %d bytes long: %s%s",
1083 (int)(strlen(proxystring
) + strlen(url
)), proxystring
, url
);
1086 tor_snprintf(request
, sizeof(request
), "%s %s", httpcommand
, proxystring
);
1087 connection_write_to_buf(request
, strlen(request
), TO_CONN(conn
));
1088 connection_write_to_buf(url
, strlen(url
), TO_CONN(conn
));
1091 if (!strcmp(httpcommand
, "GET") && !payload
) {
1092 tor_snprintf(request
, sizeof(request
),
1093 " HTTP/1.0\r\nHost: %s%s%s\r\n\r\n",
1098 tor_snprintf(request
, sizeof(request
),
1099 " HTTP/1.0\r\nContent-Length: %lu\r\nHost: %s%s%s\r\n\r\n",
1100 payload
? (unsigned long)payload_len
: 0,
1105 connection_write_to_buf(request
, strlen(request
), TO_CONN(conn
));
1108 /* then send the payload afterwards too */
1109 connection_write_to_buf(payload
, payload_len
, TO_CONN(conn
));
1113 /** Parse an HTTP request string <b>headers</b> of the form
1115 * "\%s [http[s]://]\%s HTTP/1..."
1117 * If it's well-formed, strdup the second \%s into *<b>url</b>, and
1118 * nul-terminate it. If the url doesn't start with "/tor/", rewrite it
1119 * so it does. Return 0.
1120 * Otherwise, return -1.
1123 parse_http_url(const char *headers
, char **url
)
1125 char *s
, *start
, *tmp
;
1127 s
= (char *)eat_whitespace_no_nl(headers
);
1129 s
= (char *)find_whitespace(s
); /* get past GET/POST */
1131 s
= (char *)eat_whitespace_no_nl(s
);
1133 start
= s
; /* this is it, assuming it's valid */
1134 s
= (char *)find_whitespace(start
);
1137 /* tolerate the http[s] proxy style of putting the hostname in the url */
1138 if (s
-start
>= 4 && !strcmpstart(start
,"http")) {
1142 if (s
-tmp
>= 3 && !strcmpstart(tmp
,"://")) {
1143 tmp
= strchr(tmp
+3, '/');
1144 if (tmp
&& tmp
< s
) {
1145 log_debug(LD_DIR
,"Skipping over 'http[s]://hostname' string");
1151 if (s
-start
< 5 || strcmpstart(start
,"/tor/")) { /* need to rewrite it */
1152 *url
= tor_malloc(s
- start
+ 5);
1153 strlcpy(*url
,"/tor", s
-start
+5);
1154 strlcat((*url
)+4, start
, s
-start
+1);
1156 *url
= tor_strndup(start
, s
-start
);
1161 /** Return a copy of the first HTTP header in <b>headers</b> whose key is
1162 * <b>which</b>. The key should be given with a terminating colon and space;
1163 * this function copies everything after, up to but not including the
1164 * following \\r\\n. */
1166 http_get_header(const char *headers
, const char *which
)
1168 const char *cp
= headers
;
1170 if (!strcasecmpstart(cp
, which
)) {
1172 cp
+= strlen(which
);
1173 if ((eos
= strchr(cp
,'\r')))
1174 return tor_strndup(cp
, eos
-cp
);
1176 return tor_strdup(cp
);
1178 cp
= strchr(cp
, '\n');
1185 /** If <b>headers</b> indicates that a proxy was involved, then rewrite
1186 * <b>conn</b>-\>address to describe our best guess of the address that
1187 * originated this HTTP request. */
1189 http_set_address_origin(const char *headers
, connection_t
*conn
)
1193 fwd
= http_get_header(headers
, "Forwarded-For: ");
1195 fwd
= http_get_header(headers
, "X-Forwarded-For: ");
1198 if (!tor_inet_aton(fwd
, &in
) || is_internal_IP(ntohl(in
.s_addr
), 0)) {
1199 log_debug(LD_DIR
, "Ignoring unrecognized or internal IP %s",
1204 tor_free(conn
->address
);
1205 conn
->address
= tor_strdup(fwd
);
1210 /** Parse an HTTP response string <b>headers</b> of the form
1212 * "HTTP/1.\%d \%d\%s\r\n...".
1215 * If it's well-formed, assign the status code to *<b>code</b> and
1216 * return 0. Otherwise, return -1.
1218 * On success: If <b>date</b> is provided, set *date to the Date
1219 * header in the http headers, or 0 if no such header is found. If
1220 * <b>compression</b> is provided, set *<b>compression</b> to the
1221 * compression method given in the Content-Encoding header, or 0 if no
1222 * such header is found, or -1 if the value of the header is not
1223 * recognized. If <b>reason</b> is provided, strdup the reason string
1227 parse_http_response(const char *headers
, int *code
, time_t *date
,
1228 compress_method_t
*compression
, char **reason
)
1231 char datestr
[RFC1123_TIME_LEN
+1];
1232 smartlist_t
*parsed_headers
;
1233 tor_assert(headers
);
1236 while (TOR_ISSPACE(*headers
)) headers
++; /* tolerate leading whitespace */
1238 if (tor_sscanf(headers
, "HTTP/1.%u %u", &n1
, &n2
) < 2 ||
1239 (n1
!= 0 && n1
!= 1) ||
1240 (n2
< 100 || n2
>= 600)) {
1241 log_warn(LD_HTTP
,"Failed to parse header %s",escaped(headers
));
1246 parsed_headers
= smartlist_create();
1247 smartlist_split_string(parsed_headers
, headers
, "\n",
1248 SPLIT_SKIP_SPACE
|SPLIT_IGNORE_BLANK
, -1);
1250 smartlist_t
*status_line_elements
= smartlist_create();
1251 tor_assert(smartlist_len(parsed_headers
));
1252 smartlist_split_string(status_line_elements
,
1253 smartlist_get(parsed_headers
, 0),
1254 " ", SPLIT_SKIP_SPACE
|SPLIT_IGNORE_BLANK
, 3);
1255 tor_assert(smartlist_len(status_line_elements
) <= 3);
1256 if (smartlist_len(status_line_elements
) == 3) {
1257 *reason
= smartlist_get(status_line_elements
, 2);
1258 smartlist_set(status_line_elements
, 2, NULL
); /* Prevent free */
1260 SMARTLIST_FOREACH(status_line_elements
, char *, cp
, tor_free(cp
));
1261 smartlist_free(status_line_elements
);
1265 SMARTLIST_FOREACH(parsed_headers
, const char *, s
,
1266 if (!strcmpstart(s
, "Date: ")) {
1267 strlcpy(datestr
, s
+6, sizeof(datestr
));
1268 /* This will do nothing on failure, so we don't need to check
1269 the result. We shouldn't warn, since there are many other valid
1270 date formats besides the one we use. */
1271 parse_rfc1123_time(datestr
, date
);
1276 const char *enc
= NULL
;
1277 SMARTLIST_FOREACH(parsed_headers
, const char *, s
,
1278 if (!strcmpstart(s
, "Content-Encoding: ")) {
1281 if (!enc
|| !strcmp(enc
, "identity")) {
1282 *compression
= NO_METHOD
;
1283 } else if (!strcmp(enc
, "deflate") || !strcmp(enc
, "x-deflate")) {
1284 *compression
= ZLIB_METHOD
;
1285 } else if (!strcmp(enc
, "gzip") || !strcmp(enc
, "x-gzip")) {
1286 *compression
= GZIP_METHOD
;
1288 log_info(LD_HTTP
, "Unrecognized content encoding: %s. Trying to deal.",
1290 *compression
= UNKNOWN_METHOD
;
1293 SMARTLIST_FOREACH(parsed_headers
, char *, s
, tor_free(s
));
1294 smartlist_free(parsed_headers
);
1299 /** Return true iff <b>body</b> doesn't start with a plausible router or
1300 * running-list or directory opening. This is a sign of possible compression.
1303 body_is_plausible(const char *body
, size_t len
, int purpose
)
1307 return 1; /* empty bodies don't need decompression */
1310 if (purpose
!= DIR_PURPOSE_FETCH_RENDDESC
) {
1311 if (!strcmpstart(body
,"router") ||
1312 !strcmpstart(body
,"signed-directory") ||
1313 !strcmpstart(body
,"network-status") ||
1314 !strcmpstart(body
,"running-routers"))
1316 for (i
=0;i
<32;++i
) {
1317 if (!TOR_ISPRINT(body
[i
]) && !TOR_ISSPACE(body
[i
]))
1326 /** Called when we've just fetched a bunch of router descriptors in
1327 * <b>body</b>. The list <b>which</b>, if present, holds digests for
1328 * descriptors we requested: descriptor digests if <b>descriptor_digests</b>
1329 * is true, or identity digests otherwise. Parse the descriptors, validate
1330 * them, and annotate them as having purpose <b>purpose</b> and as having been
1331 * downloaded from <b>source</b>.
1333 * Return the number of routers actually added. */
1335 load_downloaded_routers(const char *body
, smartlist_t
*which
,
1336 int descriptor_digests
,
1341 char time_buf
[ISO_TIME_LEN
+1];
1343 int general
= router_purpose
== ROUTER_PURPOSE_GENERAL
;
1344 format_iso_time(time_buf
, time(NULL
));
1347 if (tor_snprintf(buf
, sizeof(buf
),
1348 "@downloaded-at %s\n"
1350 "%s%s%s", time_buf
, escaped(source
),
1351 !general
? "@purpose " : "",
1352 !general
? router_purpose_to_string(router_purpose
) : "",
1353 !general
? "\n" : "")<0)
1356 added
= router_load_routers_from_string(body
, NULL
, SAVED_NOWHERE
, which
,
1357 descriptor_digests
, buf
);
1358 control_event_bootstrap(BOOTSTRAP_STATUS_LOADING_DESCRIPTORS
,
1359 count_loading_descriptors_progress());
1363 /** We are a client, and we've finished reading the server's
1364 * response. Parse it and act appropriately.
1366 * If we're still happy with using this directory server in the future, return
1367 * 0. Otherwise return -1; and the caller should consider trying the request
1370 * The caller will take care of marking the connection for close.
1373 connection_dir_client_reached_eof(dir_connection_t
*conn
)
1377 char *reason
= NULL
;
1378 size_t body_len
=0, orig_len
=0;
1380 time_t date_header
=0;
1382 compress_method_t compression
;
1385 int allow_partial
= (conn
->_base
.purpose
== DIR_PURPOSE_FETCH_SERVERDESC
||
1386 conn
->_base
.purpose
== DIR_PURPOSE_FETCH_EXTRAINFO
);
1387 int was_compressed
=0;
1388 time_t now
= time(NULL
);
1390 switch (fetch_from_buf_http(conn
->_base
.inbuf
,
1391 &headers
, MAX_HEADERS_SIZE
,
1392 &body
, &body_len
, MAX_DIR_DL_SIZE
,
1394 case -1: /* overflow */
1395 log_warn(LD_PROTOCOL
,
1396 "'fetch' response too large (server '%s:%d'). Closing.",
1397 conn
->_base
.address
, conn
->_base
.port
);
1401 "'fetch' response not all here, but we're at eof. Closing.");
1403 /* case 1, fall through */
1405 orig_len
= body_len
;
1407 if (parse_http_response(headers
, &status_code
, &date_header
,
1408 &compression
, &reason
) < 0) {
1409 log_warn(LD_HTTP
,"Unparseable headers (server '%s:%d'). Closing.",
1410 conn
->_base
.address
, conn
->_base
.port
);
1411 tor_free(body
); tor_free(headers
);
1414 if (!reason
) reason
= tor_strdup("[no reason given]");
1417 "Received response from directory server '%s:%d': %d %s",
1418 conn
->_base
.address
, conn
->_base
.port
, status_code
,
1421 /* now check if it's got any hints for us about our IP address. */
1422 if (conn
->dirconn_direct
) {
1423 char *guess
= http_get_header(headers
, X_ADDRESS_HEADER
);
1425 router_new_address_suggestion(guess
, conn
);
1430 if (date_header
> 0) {
1431 /* The date header was written very soon after we sent our request,
1432 * so compute the skew as the difference between sending the request
1433 * and the date header. (We used to check now-date_header, but that's
1434 * inaccurate if we spend a lot of time downloading.)
1436 delta
= conn
->_base
.timestamp_lastwritten
- date_header
;
1437 if (labs(delta
)>ALLOW_DIRECTORY_TIME_SKEW
) {
1439 int trusted
= router_digest_is_trusted_dir(conn
->identity_digest
);
1440 format_time_interval(dbuf
, sizeof(dbuf
), delta
);
1441 log_fn(trusted
? LOG_WARN
: LOG_INFO
,
1443 "Received directory with skewed time (server '%s:%d'): "
1444 "It seems that our clock is %s by %s, or that theirs is %s. "
1445 "Tor requires an accurate clock to work: please check your time, "
1446 "timezone, and date settings.",
1447 conn
->_base
.address
, conn
->_base
.port
,
1448 delta
>0 ? "ahead" : "behind", dbuf
,
1449 delta
>0 ? "behind" : "ahead");
1450 skewed
= 1; /* don't check the recommended-versions line */
1451 control_event_general_status(trusted
? LOG_WARN
: LOG_NOTICE
,
1452 "CLOCK_SKEW SKEW=%ld SOURCE=DIRSERV:%s:%d",
1453 delta
, conn
->_base
.address
, conn
->_base
.port
);
1455 log_debug(LD_HTTP
, "Time on received directory is within tolerance; "
1456 "we are %ld seconds skewed. (That's okay.)", delta
);
1459 (void) skewed
; /* skewed isn't used yet. */
1461 if (status_code
== 503 && body_len
< 16) {
1463 trusted_dir_server_t
*ds
;
1464 log_info(LD_DIR
,"Received http status code %d (%s) from server "
1465 "'%s:%d'. I'll try again soon.",
1466 status_code
, escaped(reason
), conn
->_base
.address
,
1468 if ((rs
= router_get_consensus_status_by_id(conn
->identity_digest
)))
1469 rs
->last_dir_503_at
= now
;
1470 if ((ds
= router_get_trusteddirserver_by_digest(conn
->identity_digest
)))
1471 ds
->fake_status
.last_dir_503_at
= now
;
1473 tor_free(body
); tor_free(headers
); tor_free(reason
);
1475 } else if (status_code
== 503) {
1476 /* XXXX022 Remove this once every server with bug 539 is obsolete. */
1477 log_info(LD_DIR
, "Server at '%s:%d' sent us a 503 response, but included "
1478 "a body anyway. We'll pretend it gave us a 200.",
1479 conn
->_base
.address
, conn
->_base
.port
);
1483 plausible
= body_is_plausible(body
, body_len
, conn
->_base
.purpose
);
1484 if (compression
!= NO_METHOD
|| !plausible
) {
1485 char *new_body
= NULL
;
1487 compress_method_t guessed
= detect_compression_method(body
, body_len
);
1488 if (compression
== UNKNOWN_METHOD
|| guessed
!= compression
) {
1489 /* Tell the user if we don't believe what we're told about compression.*/
1490 const char *description1
, *description2
;
1491 if (compression
== ZLIB_METHOD
)
1492 description1
= "as deflated";
1493 else if (compression
== GZIP_METHOD
)
1494 description1
= "as gzipped";
1495 else if (compression
== NO_METHOD
)
1496 description1
= "as uncompressed";
1498 description1
= "with an unknown Content-Encoding";
1499 if (guessed
== ZLIB_METHOD
)
1500 description2
= "deflated";
1501 else if (guessed
== GZIP_METHOD
)
1502 description2
= "gzipped";
1503 else if (!plausible
)
1504 description2
= "confusing binary junk";
1506 description2
= "uncompressed";
1508 log_info(LD_HTTP
, "HTTP body from server '%s:%d' was labeled %s, "
1509 "but it seems to be %s.%s",
1510 conn
->_base
.address
, conn
->_base
.port
, description1
,
1512 (compression
>0 && guessed
>0)?" Trying both.":"");
1514 /* Try declared compression first if we can. */
1515 if (compression
== GZIP_METHOD
|| compression
== ZLIB_METHOD
)
1516 tor_gzip_uncompress(&new_body
, &new_len
, body
, body_len
, compression
,
1517 !allow_partial
, LOG_PROTOCOL_WARN
);
1518 /* Okay, if that didn't work, and we think that it was compressed
1519 * differently, try that. */
1521 (guessed
== GZIP_METHOD
|| guessed
== ZLIB_METHOD
) &&
1522 compression
!= guessed
)
1523 tor_gzip_uncompress(&new_body
, &new_len
, body
, body_len
, guessed
,
1524 !allow_partial
, LOG_PROTOCOL_WARN
);
1525 /* If we're pretty sure that we have a compressed directory, and
1526 * we didn't manage to uncompress it, then warn and bail. */
1527 if (!plausible
&& !new_body
) {
1528 log_fn(LOG_PROTOCOL_WARN
, LD_HTTP
,
1529 "Unable to decompress HTTP body (server '%s:%d').",
1530 conn
->_base
.address
, conn
->_base
.port
);
1531 tor_free(body
); tor_free(headers
); tor_free(reason
);
1542 if (conn
->_base
.purpose
== DIR_PURPOSE_FETCH_V2_NETWORKSTATUS
) {
1543 smartlist_t
*which
= NULL
;
1544 v2_networkstatus_source_t source
;
1546 log_info(LD_DIR
,"Received networkstatus objects (size %d) from server "
1547 "'%s:%d'",(int) body_len
, conn
->_base
.address
, conn
->_base
.port
);
1548 if (status_code
!= 200) {
1550 "Received http status code %d (%s) from server "
1551 "'%s:%d' while fetching \"/tor/status/%s\". I'll try again soon.",
1552 status_code
, escaped(reason
), conn
->_base
.address
,
1553 conn
->_base
.port
, conn
->requested_resource
);
1554 tor_free(body
); tor_free(headers
); tor_free(reason
);
1555 connection_dir_download_networkstatus_failed(conn
, status_code
);
1558 if (conn
->requested_resource
&&
1559 !strcmpstart(conn
->requested_resource
,"fp/")) {
1560 source
= NS_FROM_DIR_BY_FP
;
1561 which
= smartlist_create();
1562 dir_split_resource_into_fingerprints(conn
->requested_resource
+3,
1564 } else if (conn
->requested_resource
&&
1565 !strcmpstart(conn
->requested_resource
, "all")) {
1566 source
= NS_FROM_DIR_ALL
;
1567 which
= smartlist_create();
1568 SMARTLIST_FOREACH(router_get_trusted_dir_servers(),
1569 trusted_dir_server_t
*, ds
,
1571 char *hex
= tor_malloc(HEX_DIGEST_LEN
+1);
1572 base16_encode(hex
, HEX_DIGEST_LEN
+1, ds
->digest
, DIGEST_LEN
);
1573 smartlist_add(which
, hex
);
1576 /* XXXX Can we even end up here? -- weasel*/
1577 source
= NS_FROM_DIR_BY_FP
;
1578 log_warn(LD_BUG
, "We received a networkstatus but we didn't ask "
1579 "for it by fp, nor did we ask for all.");
1583 char *next
= strstr(cp
, "\nnetwork-status-version");
1586 /* learn from it, and then remove it from 'which' */
1587 if (router_set_networkstatus_v2(cp
, now
, source
, which
)<0)
1595 /* launches router downloads as needed */
1596 routers_update_all_from_networkstatus(now
, 2);
1597 directory_info_has_arrived(now
, 0);
1599 if (smartlist_len(which
)) {
1600 dir_networkstatus_download_failed(which
, status_code
);
1602 SMARTLIST_FOREACH(which
, char *, s
, tor_free(s
));
1603 smartlist_free(which
);
1607 if (conn
->_base
.purpose
== DIR_PURPOSE_FETCH_CONSENSUS
) {
1609 if (status_code
!= 200) {
1610 int severity
= (status_code
== 304) ? LOG_INFO
: LOG_WARN
;
1611 log(severity
, LD_DIR
,
1612 "Received http status code %d (%s) from server "
1613 "'%s:%d' while fetching consensus directory.",
1614 status_code
, escaped(reason
), conn
->_base
.address
,
1616 tor_free(body
); tor_free(headers
); tor_free(reason
);
1617 networkstatus_consensus_download_failed(status_code
);
1620 log_info(LD_DIR
,"Received consensus directory (size %d) from server "
1621 "'%s:%d'",(int) body_len
, conn
->_base
.address
, conn
->_base
.port
);
1622 if ((r
=networkstatus_set_current_consensus(body
, 0))<0) {
1623 log_fn(r
<-1?LOG_WARN
:LOG_INFO
, LD_DIR
,
1624 "Unable to load consensus directory downloaded from "
1625 "server '%s:%d'. I'll try again soon.",
1626 conn
->_base
.address
, conn
->_base
.port
);
1627 tor_free(body
); tor_free(headers
); tor_free(reason
);
1628 networkstatus_consensus_download_failed(0);
1631 /* launches router downloads as needed */
1632 routers_update_all_from_networkstatus(now
, 3);
1633 directory_info_has_arrived(now
, 0);
1634 log_info(LD_DIR
, "Successfully loaded consensus.");
1637 if (conn
->_base
.purpose
== DIR_PURPOSE_FETCH_CERTIFICATE
) {
1638 if (status_code
!= 200) {
1640 "Received http status code %d (%s) from server "
1641 "'%s:%d' while fetching \"/tor/keys/%s\".",
1642 status_code
, escaped(reason
), conn
->_base
.address
,
1643 conn
->_base
.port
, conn
->requested_resource
);
1644 connection_dir_download_cert_failed(conn
, status_code
);
1645 tor_free(body
); tor_free(headers
); tor_free(reason
);
1648 log_info(LD_DIR
,"Received authority certificates (size %d) from server "
1649 "'%s:%d'",(int) body_len
, conn
->_base
.address
, conn
->_base
.port
);
1650 if (trusted_dirs_load_certs_from_string(body
, 0, 1)<0) {
1651 log_warn(LD_DIR
, "Unable to parse fetched certificates");
1652 connection_dir_download_cert_failed(conn
, status_code
);
1654 directory_info_has_arrived(now
, 0);
1655 log_info(LD_DIR
, "Successfully loaded certificates from fetch.");
1658 if (conn
->_base
.purpose
== DIR_PURPOSE_FETCH_STATUS_VOTE
) {
1661 log_info(LD_DIR
,"Got votes (size %d) from server %s:%d",
1662 (int) body_len
, conn
->_base
.address
, conn
->_base
.port
);
1663 if (status_code
!= 200) {
1665 "Received http status code %d (%s) from server "
1666 "'%s:%d' while fetching \"/tor/status-vote/next/%s.z\".",
1667 status_code
, escaped(reason
), conn
->_base
.address
,
1668 conn
->_base
.port
, conn
->requested_resource
);
1669 tor_free(body
); tor_free(headers
); tor_free(reason
);
1672 dirvote_add_vote(body
, &msg
, &st
);
1674 log_warn(LD_DIR
, "Error adding retrieved vote: %s", msg
);
1676 log_info(LD_DIR
, "Added vote(s) successfully [msg: %s]", msg
);
1679 if (conn
->_base
.purpose
== DIR_PURPOSE_FETCH_DETACHED_SIGNATURES
) {
1680 const char *msg
= NULL
;
1681 log_info(LD_DIR
,"Got detached signatures (size %d) from server %s:%d",
1682 (int) body_len
, conn
->_base
.address
, conn
->_base
.port
);
1683 if (status_code
!= 200) {
1685 "Received http status code %d (%s) from server "
1686 "'%s:%d' while fetching \"/tor/status-vote/consensus-signatures.z\".",
1687 status_code
, escaped(reason
), conn
->_base
.address
,
1689 tor_free(body
); tor_free(headers
); tor_free(reason
);
1692 if (dirvote_add_signatures(body
, conn
->_base
.address
, &msg
)<0) {
1693 log_warn(LD_DIR
, "Problem adding detached signatures from %s:%d: %s",
1694 conn
->_base
.address
, conn
->_base
.port
, msg
?msg
:"???");
1698 if (conn
->_base
.purpose
== DIR_PURPOSE_FETCH_SERVERDESC
||
1699 conn
->_base
.purpose
== DIR_PURPOSE_FETCH_EXTRAINFO
) {
1700 int was_ei
= conn
->_base
.purpose
== DIR_PURPOSE_FETCH_EXTRAINFO
;
1701 smartlist_t
*which
= NULL
;
1702 int n_asked_for
= 0;
1703 int descriptor_digests
= conn
->requested_resource
&&
1704 !strcmpstart(conn
->requested_resource
,"d/");
1705 log_info(LD_DIR
,"Received %s (size %d) from server '%s:%d'",
1706 was_ei
? "extra server info" : "server info",
1707 (int)body_len
, conn
->_base
.address
, conn
->_base
.port
);
1708 if (conn
->requested_resource
&&
1709 (!strcmpstart(conn
->requested_resource
,"d/") ||
1710 !strcmpstart(conn
->requested_resource
,"fp/"))) {
1711 which
= smartlist_create();
1712 dir_split_resource_into_fingerprints(conn
->requested_resource
+
1713 (descriptor_digests
? 2 : 3),
1715 n_asked_for
= smartlist_len(which
);
1717 if (status_code
!= 200) {
1718 int dir_okay
= status_code
== 404 ||
1719 (status_code
== 400 && !strcmp(reason
, "Servers unavailable."));
1720 /* 404 means that it didn't have them; no big deal.
1721 * Older (pre-0.1.1.8) servers said 400 Servers unavailable instead. */
1722 log_fn(dir_okay
? LOG_INFO
: LOG_WARN
, LD_DIR
,
1723 "Received http status code %d (%s) from server '%s:%d' "
1724 "while fetching \"/tor/server/%s\". I'll try again soon.",
1725 status_code
, escaped(reason
), conn
->_base
.address
,
1726 conn
->_base
.port
, conn
->requested_resource
);
1728 connection_dir_download_routerdesc_failed(conn
);
1730 dir_routerdesc_download_failed(which
, status_code
,
1731 conn
->router_purpose
,
1732 was_ei
, descriptor_digests
);
1733 SMARTLIST_FOREACH(which
, char *, cp
, tor_free(cp
));
1734 smartlist_free(which
);
1736 tor_free(body
); tor_free(headers
); tor_free(reason
);
1737 return dir_okay
? 0 : -1;
1739 /* Learn the routers, assuming we requested by fingerprint or "all"
1742 * We use "authority" to fetch our own descriptor for
1743 * testing, and to fetch bridge descriptors for bootstrapping. Ignore
1744 * the output of "authority" requests unless we are using bridges,
1745 * since otherwise they'll be the response from reachability tests,
1746 * and we don't really want to add that to our routerlist. */
1747 if (which
|| (conn
->requested_resource
&&
1748 (!strcmpstart(conn
->requested_resource
, "all") ||
1749 (!strcmpstart(conn
->requested_resource
, "authority") &&
1750 get_options()->UseBridges
)))) {
1751 /* as we learn from them, we remove them from 'which' */
1753 router_load_extrainfo_from_string(body
, NULL
, SAVED_NOWHERE
, which
,
1754 descriptor_digests
);
1756 //router_load_routers_from_string(body, NULL, SAVED_NOWHERE, which,
1757 // descriptor_digests, conn->router_purpose);
1758 if (load_downloaded_routers(body
, which
, descriptor_digests
,
1759 conn
->router_purpose
,
1760 conn
->_base
.address
))
1761 directory_info_has_arrived(now
, 0);
1764 if (which
) { /* mark remaining ones as failed */
1765 log_info(LD_DIR
, "Received %d/%d %s requested from %s:%d",
1766 n_asked_for
-smartlist_len(which
), n_asked_for
,
1767 was_ei
? "extra-info documents" : "router descriptors",
1768 conn
->_base
.address
, (int)conn
->_base
.port
);
1769 if (smartlist_len(which
)) {
1770 dir_routerdesc_download_failed(which
, status_code
,
1771 conn
->router_purpose
,
1772 was_ei
, descriptor_digests
);
1774 SMARTLIST_FOREACH(which
, char *, cp
, tor_free(cp
));
1775 smartlist_free(which
);
1777 if (directory_conn_is_self_reachability_test(conn
))
1778 router_dirport_found_reachable();
1781 if (conn
->_base
.purpose
== DIR_PURPOSE_UPLOAD_DIR
) {
1782 switch (status_code
) {
1784 trusted_dir_server_t
*ds
=
1785 router_get_trusteddirserver_by_digest(conn
->identity_digest
);
1786 char *rejected_hdr
= http_get_header(headers
,
1787 "X-Descriptor-Not-New: ");
1790 if (!strcmp(rejected_hdr
, "Yes")) {
1791 log_info(LD_GENERAL
,
1792 "Authority '%s' declined our descriptor (not new)",
1794 /* XXXX use this information; be sure to upload next one
1796 /* XXXX021 On further thought, the task above implies that we're
1797 * basing our regenerate-descriptor time on when we uploaded the
1798 * last descriptor, not on the published time of the last
1799 * descriptor. If those are different, that's a bad thing to
1803 tor_free(rejected_hdr
);
1805 log_info(LD_GENERAL
,"eof (status 200) after uploading server "
1806 "descriptor: finished.");
1807 control_event_server_status(
1808 LOG_NOTICE
, "ACCEPTED_SERVER_DESCRIPTOR DIRAUTH=%s:%d",
1809 conn
->_base
.address
, conn
->_base
.port
);
1811 ds
->has_accepted_serverdesc
= 1;
1812 if (directories_have_accepted_server_descriptor())
1813 control_event_server_status(LOG_NOTICE
, "GOOD_SERVER_DESCRIPTOR");
1817 log_warn(LD_GENERAL
,"http status 400 (%s) response from "
1818 "dirserver '%s:%d'. Please correct.",
1819 escaped(reason
), conn
->_base
.address
, conn
->_base
.port
);
1820 control_event_server_status(LOG_WARN
,
1821 "BAD_SERVER_DESCRIPTOR DIRAUTH=%s:%d REASON=\"%s\"",
1822 conn
->_base
.address
, conn
->_base
.port
, escaped(reason
));
1825 log_warn(LD_GENERAL
,
1826 "http status %d (%s) reason unexpected while uploading "
1827 "descriptor to server '%s:%d').",
1828 status_code
, escaped(reason
), conn
->_base
.address
,
1832 /* return 0 in all cases, since we don't want to mark any
1833 * dirservers down just because they don't like us. */
1836 if (conn
->_base
.purpose
== DIR_PURPOSE_UPLOAD_VOTE
) {
1837 switch (status_code
) {
1839 log_notice(LD_DIR
,"Uploaded a vote to dirserver %s:%d",
1840 conn
->_base
.address
, conn
->_base
.port
);
1844 log_warn(LD_DIR
,"http status 400 (%s) response after uploading "
1845 "vote to dirserver '%s:%d'. Please correct.",
1846 escaped(reason
), conn
->_base
.address
, conn
->_base
.port
);
1849 log_warn(LD_GENERAL
,
1850 "http status %d (%s) reason unexpected while uploading "
1851 "vote to server '%s:%d').",
1852 status_code
, escaped(reason
), conn
->_base
.address
,
1856 /* return 0 in all cases, since we don't want to mark any
1857 * dirservers down just because they don't like us. */
1860 if (conn
->_base
.purpose
== DIR_PURPOSE_UPLOAD_SIGNATURES
) {
1861 switch (status_code
) {
1863 log_notice(LD_DIR
,"Uploaded signature(s) to dirserver %s:%d",
1864 conn
->_base
.address
, conn
->_base
.port
);
1868 log_warn(LD_DIR
,"http status 400 (%s) response after uploading "
1869 "signatures to dirserver '%s:%d'. Please correct.",
1870 escaped(reason
), conn
->_base
.address
, conn
->_base
.port
);
1873 log_warn(LD_GENERAL
,
1874 "http status %d (%s) reason unexpected while uploading "
1875 "signatures to server '%s:%d').",
1876 status_code
, escaped(reason
), conn
->_base
.address
,
1880 /* return 0 in all cases, since we don't want to mark any
1881 * dirservers down just because they don't like us. */
1884 if (conn
->_base
.purpose
== DIR_PURPOSE_FETCH_RENDDESC
) {
1885 tor_assert(conn
->rend_data
);
1886 log_info(LD_REND
,"Received rendezvous descriptor (size %d, status %d "
1888 (int)body_len
, status_code
, escaped(reason
));
1889 switch (status_code
) {
1891 if (rend_cache_store(body
, body_len
, 0) < -1) {
1892 log_warn(LD_REND
,"Failed to parse rendezvous descriptor.");
1893 /* Any pending rendezvous attempts will notice when
1894 * connection_about_to_close_connection()
1895 * cleans this dir conn up. */
1896 /* We could retry. But since v0 descriptors are going out of
1897 * style, it isn't worth the hassle. We'll do better in v2. */
1899 /* Success, or at least there's a v2 descriptor already
1900 * present. Notify pending connections about this. */
1901 conn
->_base
.purpose
= DIR_PURPOSE_HAS_FETCHED_RENDDESC
;
1902 rend_client_desc_trynow(conn
->rend_data
->onion_address
, -1);
1906 /* Not there. Pending connections will be notified when
1907 * connection_about_to_close_connection() cleans this conn up. */
1911 "http status 400 (%s). Dirserver didn't like our "
1912 "rendezvous query?", escaped(reason
));
1915 log_warn(LD_REND
,"http status %d (%s) response unexpected while "
1916 "fetching hidden service descriptor (server '%s:%d').",
1917 status_code
, escaped(reason
), conn
->_base
.address
,
1923 if (conn
->_base
.purpose
== DIR_PURPOSE_FETCH_RENDDESC_V2
) {
1924 tor_assert(conn
->rend_data
);
1925 log_info(LD_REND
,"Received rendezvous descriptor (size %d, status %d "
1927 (int)body_len
, status_code
, escaped(reason
));
1928 switch (status_code
) {
1930 switch (rend_cache_store_v2_desc_as_client(body
, conn
->rend_data
)) {
1932 log_warn(LD_REND
,"Fetching v2 rendezvous descriptor failed. "
1933 "Retrying at another directory.");
1934 /* We'll retry when connection_about_to_close_connection()
1935 * cleans this dir conn up. */
1938 /* We already have a v0 descriptor here. Ignoring this one
1939 * and _not_ performing another request. */
1940 log_info(LD_REND
, "Successfully fetched v2 rendezvous "
1941 "descriptor, but we already have a v0 descriptor.");
1942 conn
->_base
.purpose
= DIR_PURPOSE_HAS_FETCHED_RENDDESC
;
1945 /* success. notify pending connections about this. */
1946 log_info(LD_REND
, "Successfully fetched v2 rendezvous "
1948 conn
->_base
.purpose
= DIR_PURPOSE_HAS_FETCHED_RENDDESC
;
1949 rend_client_desc_trynow(conn
->rend_data
->onion_address
, -1);
1954 /* Not there. We'll retry when
1955 * connection_about_to_close_connection() cleans this conn up. */
1956 log_info(LD_REND
,"Fetching v2 rendezvous descriptor failed: "
1957 "Retrying at another directory.");
1960 log_warn(LD_REND
, "Fetching v2 rendezvous descriptor failed: "
1961 "http status 400 (%s). Dirserver didn't like our "
1962 "v2 rendezvous query? Retrying at another directory.",
1966 log_warn(LD_REND
, "Fetching v2 rendezvous descriptor failed: "
1967 "http status %d (%s) response unexpected while "
1968 "fetching v2 hidden service descriptor (server '%s:%d'). "
1969 "Retrying at another directory.",
1970 status_code
, escaped(reason
), conn
->_base
.address
,
1976 if (conn
->_base
.purpose
== DIR_PURPOSE_UPLOAD_RENDDESC
||
1977 conn
->_base
.purpose
== DIR_PURPOSE_UPLOAD_RENDDESC_V2
) {
1978 log_info(LD_REND
,"Uploaded rendezvous descriptor (status %d "
1980 status_code
, escaped(reason
));
1981 switch (status_code
) {
1984 "Uploading rendezvous descriptor: finished with status "
1985 "200 (%s)", escaped(reason
));
1988 log_warn(LD_REND
,"http status 400 (%s) response from dirserver "
1989 "'%s:%d'. Malformed rendezvous descriptor?",
1990 escaped(reason
), conn
->_base
.address
, conn
->_base
.port
);
1993 log_info(LD_REND
,"http status 503 (%s) response from dirserver "
1994 "'%s:%d'. Node is (currently) not acting as v2 hidden "
1995 "service directory.",
1996 escaped(reason
), conn
->_base
.address
, conn
->_base
.port
);
1999 log_warn(LD_REND
,"http status %d (%s) response unexpected (server "
2001 status_code
, escaped(reason
), conn
->_base
.address
,
2006 note_client_request(conn
->_base
.purpose
, was_compressed
, orig_len
);
2007 tor_free(body
); tor_free(headers
); tor_free(reason
);
2011 /** Called when a directory connection reaches EOF. */
2013 connection_dir_reached_eof(dir_connection_t
*conn
)
2016 if (conn
->_base
.state
!= DIR_CONN_STATE_CLIENT_READING
) {
2017 log_info(LD_HTTP
,"conn reached eof, not reading. [state=%d] Closing.",
2019 connection_close_immediate(TO_CONN(conn
)); /* error: give up on flushing */
2020 connection_mark_for_close(TO_CONN(conn
));
2024 retval
= connection_dir_client_reached_eof(conn
);
2025 if (retval
== 0) /* success */
2026 conn
->_base
.state
= DIR_CONN_STATE_CLIENT_FINISHED
;
2027 connection_mark_for_close(TO_CONN(conn
));
2031 /** If any directory object is arriving, and it's over 10MB large, we're
2032 * getting DoS'd. (As of 0.1.2.x, raw directories are about 1MB, and we never
2033 * ask for more than 96 router descriptors at a time.)
2035 #define MAX_DIRECTORY_OBJECT_SIZE (10*(1<<20))
2037 /** Read handler for directory connections. (That's connections <em>to</em>
2038 * directory servers and connections <em>at</em> directory servers.)
2041 connection_dir_process_inbuf(dir_connection_t
*conn
)
2044 tor_assert(conn
->_base
.type
== CONN_TYPE_DIR
);
2046 /* Directory clients write, then read data until they receive EOF;
2047 * directory servers read data until they get an HTTP command, then
2048 * write their response (when it's finished flushing, they mark for
2052 /* If we're on the dirserver side, look for a command. */
2053 if (conn
->_base
.state
== DIR_CONN_STATE_SERVER_COMMAND_WAIT
) {
2054 if (directory_handle_command(conn
) < 0) {
2055 connection_mark_for_close(TO_CONN(conn
));
2061 if (buf_datalen(conn
->_base
.inbuf
) > MAX_DIRECTORY_OBJECT_SIZE
) {
2062 log_warn(LD_HTTP
, "Too much data received from directory connection: "
2063 "denial of service attempt, or you need to upgrade?");
2064 connection_mark_for_close(TO_CONN(conn
));
2068 if (!conn
->_base
.inbuf_reached_eof
)
2069 log_debug(LD_HTTP
,"Got data, not eof. Leaving on inbuf.");
2073 /** Create an http response for the client <b>conn</b> out of
2074 * <b>status</b> and <b>reason_phrase</b>. Write it to <b>conn</b>.
2077 write_http_status_line(dir_connection_t
*conn
, int status
,
2078 const char *reason_phrase
)
2081 if (tor_snprintf(buf
, sizeof(buf
), "HTTP/1.0 %d %s\r\n\r\n",
2082 status
, reason_phrase
? reason_phrase
: "OK") < 0) {
2083 log_warn(LD_BUG
,"status line too long.");
2086 connection_write_to_buf(buf
, strlen(buf
), TO_CONN(conn
));
2089 /** Write the header for an HTTP/1.0 response onto <b>conn</b>-\>outbuf,
2090 * with <b>type</b> as the Content-Type.
2092 * If <b>length</b> is nonnegative, it is the Content-Length.
2093 * If <b>encoding</b> is provided, it is the Content-Encoding.
2094 * If <b>cache_lifetime</b> is greater than 0, the content may be cached for
2095 * up to cache_lifetime seconds. Otherwise, the content may not be cached. */
2097 write_http_response_header_impl(dir_connection_t
*conn
, ssize_t length
,
2098 const char *type
, const char *encoding
,
2099 const char *extra_headers
,
2100 long cache_lifetime
)
2102 char date
[RFC1123_TIME_LEN
+1];
2105 time_t now
= time(NULL
);
2109 format_rfc1123_time(date
, now
);
2111 tor_snprintf(cp
, sizeof(tmp
),
2112 "HTTP/1.0 200 OK\r\nDate: %s\r\n",
2116 tor_snprintf(cp
, sizeof(tmp
)-(cp
-tmp
), "Content-Type: %s\r\n", type
);
2119 if (!is_local_addr(&conn
->_base
.addr
)) {
2120 /* Don't report the source address for a nearby/private connection.
2121 * Otherwise we tend to mis-report in cases where incoming ports are
2122 * being forwarded to a Tor server running behind the firewall. */
2123 tor_snprintf(cp
, sizeof(tmp
)-(cp
-tmp
),
2124 X_ADDRESS_HEADER
"%s\r\n", conn
->_base
.address
);
2128 tor_snprintf(cp
, sizeof(tmp
)-(cp
-tmp
),
2129 "Content-Encoding: %s\r\n", encoding
);
2133 tor_snprintf(cp
, sizeof(tmp
)-(cp
-tmp
),
2134 "Content-Length: %ld\r\n", (long)length
);
2137 if (cache_lifetime
> 0) {
2138 char expbuf
[RFC1123_TIME_LEN
+1];
2139 format_rfc1123_time(expbuf
, now
+ cache_lifetime
);
2140 /* We could say 'Cache-control: max-age=%d' here if we start doing
2142 tor_snprintf(cp
, sizeof(tmp
)-(cp
-tmp
),
2143 "Expires: %s\r\n", expbuf
);
2145 } else if (cache_lifetime
== 0) {
2146 /* We could say 'Cache-control: no-cache' here if we start doing
2148 strlcpy(cp
, "Pragma: no-cache\r\n", sizeof(tmp
)-(cp
-tmp
));
2151 if (extra_headers
) {
2152 strlcpy(cp
, extra_headers
, sizeof(tmp
)-(cp
-tmp
));
2155 if (sizeof(tmp
)-(cp
-tmp
) > 3)
2156 memcpy(cp
, "\r\n", 3);
2159 connection_write_to_buf(tmp
, strlen(tmp
), TO_CONN(conn
));
2162 /** As write_http_response_header_impl, but sets encoding and content-typed
2163 * based on whether the response will be <b>compressed</b> or not. */
2165 write_http_response_header(dir_connection_t
*conn
, ssize_t length
,
2166 int compressed
, long cache_lifetime
)
2168 write_http_response_header_impl(conn
, length
,
2169 compressed
?"application/octet-stream":"text/plain",
2170 compressed
?"deflate":"identity",
2175 #ifdef INSTRUMENT_DOWNLOADS
2176 typedef struct request_t
{
2177 uint64_t bytes
; /**< How many bytes have we transferred? */
2178 uint64_t count
; /**< How many requests have we made? */
2181 /** Map used to keep track of how much data we've up/downloaded in what kind
2182 * of request. Maps from request type to pointer to request_t. */
2183 static strmap_t
*request_map
= NULL
;
2185 /** Record that a client request of <b>purpose</b> was made, and that
2186 * <b>bytes</b> bytes of possibly <b>compressed</b> data were sent/received.
2187 * Used to keep track of how much we've up/downloaded in what kind of
2190 note_client_request(int purpose
, int compressed
, size_t bytes
)
2193 const char *kind
= NULL
;
2195 case DIR_PURPOSE_FETCH_V2_NETWORKSTATUS
: kind
= "dl/status"; break;
2196 case DIR_PURPOSE_FETCH_CONSENSUS
: kind
= "dl/consensus"; break;
2197 case DIR_PURPOSE_FETCH_CERTIFICATE
: kind
= "dl/cert"; break;
2198 case DIR_PURPOSE_FETCH_STATUS_VOTE
: kind
= "dl/vote"; break;
2199 case DIR_PURPOSE_FETCH_DETACHED_SIGNATURES
: kind
= "dl/detached_sig";
2201 case DIR_PURPOSE_FETCH_SERVERDESC
: kind
= "dl/server"; break;
2202 case DIR_PURPOSE_FETCH_EXTRAINFO
: kind
= "dl/extra"; break;
2203 case DIR_PURPOSE_UPLOAD_DIR
: kind
= "dl/ul-dir"; break;
2204 case DIR_PURPOSE_UPLOAD_VOTE
: kind
= "dl/ul-vote"; break;
2205 case DIR_PURPOSE_UPLOAD_SIGNATURES
: kind
= "dl/ul-sig"; break;
2206 case DIR_PURPOSE_FETCH_RENDDESC
: kind
= "dl/rend"; break;
2207 case DIR_PURPOSE_FETCH_RENDDESC_V2
: kind
= "dl/rend2"; break;
2208 case DIR_PURPOSE_UPLOAD_RENDDESC
: kind
= "dl/ul-rend"; break;
2209 case DIR_PURPOSE_UPLOAD_RENDDESC_V2
: kind
= "dl/ul-rend2"; break;
2212 key
= tor_malloc(256);
2213 tor_snprintf(key
, 256, "%s%s", kind
, compressed
?".z":"");
2215 key
= tor_malloc(256);
2216 tor_snprintf(key
, 256, "unknown purpose (%d)%s",
2217 purpose
, compressed
?".z":"");
2219 note_request(key
, bytes
);
2223 /** Helper: initialize the request map to instrument downloads. */
2225 ensure_request_map_initialized(void)
2228 request_map
= strmap_new();
2231 /** Called when we just transmitted or received <b>bytes</b> worth of data
2232 * because of a request of type <b>key</b> (an arbitrary identifier): adds
2233 * <b>bytes</b> to the total associated with key. */
2235 note_request(const char *key
, size_t bytes
)
2238 ensure_request_map_initialized();
2240 r
= strmap_get(request_map
, key
);
2242 r
= tor_malloc_zero(sizeof(request_t
));
2243 strmap_set(request_map
, key
, r
);
2249 /** Return a newly allocated string holding a summary of bytes used per
2252 directory_dump_request_log(void)
2257 strmap_iter_t
*iter
;
2259 ensure_request_map_initialized();
2261 lines
= smartlist_create();
2263 for (iter
= strmap_iter_init(request_map
);
2264 !strmap_iter_done(iter
);
2265 iter
= strmap_iter_next(request_map
, iter
)) {
2269 strmap_iter_get(iter
, &key
, &val
);
2271 tor_snprintf(tmp
, sizeof(tmp
), "%s "U64_FORMAT
" "U64_FORMAT
"\n",
2272 key
, U64_PRINTF_ARG(r
->bytes
), U64_PRINTF_ARG(r
->count
));
2273 smartlist_add(lines
, tor_strdup(tmp
));
2275 smartlist_sort_strings(lines
);
2276 result
= smartlist_join_strings(lines
, "", 0, NULL
);
2277 SMARTLIST_FOREACH(lines
, char *, cp
, tor_free(cp
));
2278 smartlist_free(lines
);
2283 note_client_request(int purpose
, int compressed
, size_t bytes
)
2291 note_request(const char *key
, size_t bytes
)
2298 directory_dump_request_log(void)
2300 return tor_strdup("Not supported.");
2304 /** Decide whether a client would accept the consensus we have
2306 * Clients can say they only want a consensus if it's signed by more
2307 * than half the authorities in a list. They pass this list in
2308 * the url as "...consensus/<b>fpr</b>+<b>fpr</b>+<b>fpr</b>".
2310 * <b>fpr</b> may be an abbreviated fingerprint, i.e. only a left substring
2311 * of the full authority identity digest. (Only strings of even length,
2312 * i.e. encodings of full bytes, are handled correctly. In the case
2313 * of an odd number of hex digits the last one is silently ignored.)
2315 * Returns 1 if more than half of the requested authorities signed the
2316 * consensus, 0 otherwise.
2319 client_likes_consensus(networkstatus_t
*v
, const char *want_url
)
2321 smartlist_t
*want_authorities
= smartlist_create();
2325 dir_split_resource_into_fingerprints(want_url
, want_authorities
, NULL
, 0, 0);
2326 need_at_least
= smartlist_len(want_authorities
)/2+1;
2327 SMARTLIST_FOREACH(want_authorities
, const char *, d
, {
2328 char want_digest
[DIGEST_LEN
];
2329 int want_len
= strlen(d
)/2;
2330 if (want_len
> DIGEST_LEN
)
2331 want_len
= DIGEST_LEN
;
2333 if (base16_decode(want_digest
, DIGEST_LEN
, d
, want_len
*2) < 0) {
2334 log_warn(LD_DIR
,"Failed to decode requested authority digest %s.", d
);
2338 SMARTLIST_FOREACH(v
->voters
, networkstatus_voter_info_t
*, vi
, {
2339 if (vi
->signature
&&
2340 !memcmp(vi
->identity_digest
, want_digest
, want_len
)) {
2346 /* early exit, if we already have enough */
2347 if (have
>= need_at_least
)
2351 SMARTLIST_FOREACH(want_authorities
, char *, d
, tor_free(d
));
2352 smartlist_free(want_authorities
);
2353 return (have
>= need_at_least
);
2356 /** Helper function: called when a dirserver gets a complete HTTP GET
2357 * request. Look for a request for a directory or for a rendezvous
2358 * service descriptor. On finding one, write a response into
2359 * conn-\>outbuf. If the request is unrecognized, send a 400.
2360 * Always return 0. */
2362 directory_handle_command_get(dir_connection_t
*conn
, const char *headers
,
2363 const char *body
, size_t body_len
)
2366 char *url
, *url_mem
, *header
;
2367 or_options_t
*options
= get_options();
2368 time_t if_modified_since
= 0;
2372 /* We ignore the body of a GET request. */
2376 log_debug(LD_DIRSERV
,"Received GET command.");
2378 conn
->_base
.state
= DIR_CONN_STATE_SERVER_WRITING
;
2380 if (parse_http_url(headers
, &url
) < 0) {
2381 write_http_status_line(conn
, 400, "Bad request");
2384 if ((header
= http_get_header(headers
, "If-Modified-Since: "))) {
2386 if (parse_http_time(header
, &tm
) == 0) {
2387 if_modified_since
= tor_timegm(&tm
);
2389 /* The correct behavior on a malformed If-Modified-Since header is to
2390 * act as if no If-Modified-Since header had been given. */
2393 log_debug(LD_DIRSERV
,"rewritten url as '%s'.", url
);
2396 url_len
= strlen(url
);
2397 compressed
= url_len
> 2 && !strcmp(url
+url_len
-2, ".z");
2399 url
[url_len
-2] = '\0';
2403 if (!strcmp(url
,"/tor/")) {
2404 const char *frontpage
= get_dirportfrontpage();
2407 dlen
= strlen(frontpage
);
2408 /* Let's return a disclaimer page (users shouldn't use V1 anymore,
2409 and caches don't fetch '/', so this is safe). */
2410 if (global_write_bucket_low(TO_CONN(conn
), dlen
, 1)) {
2411 log_info(LD_DIRSERV
,
2412 "Client asked for DirPortFrontPage content, but we've been "
2413 "writing too many bytes lately. Sending 503 Dir busy.");
2414 write_http_status_line(conn
, 503, "Directory busy, try again later");
2417 note_request(url
, dlen
);
2418 write_http_response_header_impl(conn
, dlen
, "text/html", "identity",
2419 NULL
, DIRPORTFRONTPAGE_CACHE_LIFETIME
);
2420 connection_write_to_buf(frontpage
, dlen
, TO_CONN(conn
));
2423 /* if no disclaimer file, fall through and continue */
2426 if (!strcmp(url
,"/tor/") || !strcmp(url
,"/tor/dir")) { /* v1 dir fetch */
2427 cached_dir_t
*d
= dirserv_get_directory();
2430 log_info(LD_DIRSERV
,"Client asked for the mirrored directory, but we "
2431 "don't have a good one yet. Sending 503 Dir not available.");
2432 write_http_status_line(conn
, 503, "Directory unavailable");
2435 if (d
->published
< if_modified_since
) {
2436 write_http_status_line(conn
, 304, "Not modified");
2440 dlen
= compressed
? d
->dir_z_len
: d
->dir_len
;
2442 if (global_write_bucket_low(TO_CONN(conn
), dlen
, 1)) {
2443 log_debug(LD_DIRSERV
,
2444 "Client asked for the mirrored directory, but we've been "
2445 "writing too many bytes lately. Sending 503 Dir busy.");
2446 write_http_status_line(conn
, 503, "Directory busy, try again later");
2450 note_request(url
, dlen
);
2452 log_debug(LD_DIRSERV
,"Dumping %sdirectory to client.",
2453 compressed
?"compressed ":"");
2454 write_http_response_header(conn
, dlen
, compressed
,
2455 FULL_DIR_CACHE_LIFETIME
);
2456 conn
->cached_dir
= d
;
2457 conn
->cached_dir_offset
= 0;
2459 conn
->zlib_state
= tor_zlib_new(0, ZLIB_METHOD
);
2462 /* Prime the connection with some data. */
2463 conn
->dir_spool_src
= DIR_SPOOL_CACHED_DIR
;
2464 connection_dirserv_flushed_some(conn
);
2468 if (!strcmp(url
,"/tor/running-routers")) { /* running-routers fetch */
2469 cached_dir_t
*d
= dirserv_get_runningrouters();
2471 write_http_status_line(conn
, 503, "Directory unavailable");
2474 if (d
->published
< if_modified_since
) {
2475 write_http_status_line(conn
, 304, "Not modified");
2478 dlen
= compressed
? d
->dir_z_len
: d
->dir_len
;
2480 if (global_write_bucket_low(TO_CONN(conn
), dlen
, 1)) {
2481 log_info(LD_DIRSERV
,
2482 "Client asked for running-routers, but we've been "
2483 "writing too many bytes lately. Sending 503 Dir busy.");
2484 write_http_status_line(conn
, 503, "Directory busy, try again later");
2487 note_request(url
, dlen
);
2488 write_http_response_header(conn
, dlen
, compressed
,
2489 RUNNINGROUTERS_CACHE_LIFETIME
);
2490 connection_write_to_buf(compressed
? d
->dir_z
: d
->dir
, dlen
,
2495 if (!strcmpstart(url
,"/tor/status/")
2496 || !strcmpstart(url
, "/tor/status-vote/current/consensus")) {
2497 /* v2 or v3 network status fetch. */
2498 smartlist_t
*dir_fps
= smartlist_create();
2499 int is_v3
= !strcmpstart(url
, "/tor/status-vote");
2500 const char *request_type
= NULL
;
2501 const char *key
= url
+ strlen("/tor/status/");
2502 long lifetime
= NETWORKSTATUS_CACHE_LIFETIME
;
2504 dirserv_get_networkstatus_v2_fingerprints(dir_fps
, key
);
2505 if (!strcmpstart(key
, "fp/"))
2506 request_type
= compressed
?"/tor/status/fp.z":"/tor/status/fp";
2507 else if (!strcmpstart(key
, "authority"))
2508 request_type
= compressed
?"/tor/status/authority.z":
2509 "/tor/status/authority";
2510 else if (!strcmpstart(key
, "all"))
2511 request_type
= compressed
?"/tor/status/all.z":"/tor/status/all";
2513 request_type
= "/tor/status/?";
2515 networkstatus_t
*v
= networkstatus_get_latest_consensus();
2516 time_t now
= time(NULL
);
2517 #define CONSENSUS_URL_PREFIX "/tor/status-vote/current/consensus/"
2519 !strcmpstart(url
, CONSENSUS_URL_PREFIX
) &&
2520 !client_likes_consensus(v
, url
+ strlen(CONSENSUS_URL_PREFIX
))) {
2521 write_http_status_line(conn
, 404, "Consensus not signed by sufficient "
2522 "number of requested authorities");
2523 smartlist_free(dir_fps
);
2527 smartlist_add(dir_fps
, tor_memdup("\0\0\0\0\0\0\0\0\0\0"
2528 "\0\0\0\0\0\0\0\0\0\0", 20));
2529 request_type
= compressed
?"v3.z":"v3";
2530 lifetime
= (v
&& v
->fresh_until
> now
) ? v
->fresh_until
- now
: 0;
2533 if (!smartlist_len(dir_fps
)) { /* we failed to create/cache cp */
2534 write_http_status_line(conn
, 503, "Network status object unavailable");
2535 smartlist_free(dir_fps
);
2539 if (!dirserv_remove_old_statuses(dir_fps
, if_modified_since
)) {
2540 write_http_status_line(conn
, 404, "Not found");
2541 SMARTLIST_FOREACH(dir_fps
, char *, cp
, tor_free(cp
));
2542 smartlist_free(dir_fps
);
2544 } else if (!smartlist_len(dir_fps
)) {
2545 write_http_status_line(conn
, 304, "Not modified");
2546 SMARTLIST_FOREACH(dir_fps
, char *, cp
, tor_free(cp
));
2547 smartlist_free(dir_fps
);
2551 dlen
= dirserv_estimate_data_size(dir_fps
, 0, compressed
);
2552 if (global_write_bucket_low(TO_CONN(conn
), dlen
, 2)) {
2553 log_debug(LD_DIRSERV
,
2554 "Client asked for network status lists, but we've been "
2555 "writing too many bytes lately. Sending 503 Dir busy.");
2556 write_http_status_line(conn
, 503, "Directory busy, try again later");
2557 SMARTLIST_FOREACH(dir_fps
, char *, fp
, tor_free(fp
));
2558 smartlist_free(dir_fps
);
2562 #ifdef ENABLE_GEOIP_STATS
2564 geoip_client_action_t act
=
2565 is_v3
? GEOIP_CLIENT_NETWORKSTATUS
: GEOIP_CLIENT_NETWORKSTATUS_V2
;
2567 if (tor_inet_aton((TO_CONN(conn
))->address
, &in
))
2568 geoip_note_client_seen(act
, ntohl(in
.s_addr
), time(NULL
));
2572 // note_request(request_type,dlen);
2573 (void) request_type
;
2574 write_http_response_header(conn
, -1, compressed
,
2575 smartlist_len(dir_fps
) == 1 ? lifetime
: 0);
2576 conn
->fingerprint_stack
= dir_fps
;
2578 conn
->zlib_state
= tor_zlib_new(0, ZLIB_METHOD
);
2580 /* Prime the connection with some data. */
2581 conn
->dir_spool_src
= DIR_SPOOL_NETWORKSTATUS
;
2582 connection_dirserv_flushed_some(conn
);
2586 if (!strcmpstart(url
,"/tor/status-vote/current/") ||
2587 !strcmpstart(url
,"/tor/status-vote/next/")) {
2588 /* XXXX If-modified-since is only implemented for the current
2589 * consensus: that's probably fine, since it's the only vote document
2590 * people fetch much. */
2592 ssize_t body_len
= 0;
2593 ssize_t estimated_len
= 0;
2594 smartlist_t
*items
= smartlist_create();
2595 smartlist_t
*dir_items
= smartlist_create();
2596 int lifetime
= 60; /* XXXX022 should actually use vote intervals. */
2597 url
+= strlen("/tor/status-vote/");
2598 current
= !strcmpstart(url
, "current/");
2599 url
= strchr(url
, '/');
2602 if (!strcmp(url
, "consensus")) {
2604 tor_assert(!current
); /* we handle current consensus specially above,
2605 * since it wants to be spooled. */
2606 if ((item
= dirvote_get_pending_consensus()))
2607 smartlist_add(items
, (char*)item
);
2608 } else if (!current
&& !strcmp(url
, "consensus-signatures")) {
2609 /* XXXX the spec says that we should implement
2610 * current/consensus-signatures too. It doesn't seem to be needed,
2613 if ((item
=dirvote_get_pending_detached_signatures()))
2614 smartlist_add(items
, (char*)item
);
2615 } else if (!strcmp(url
, "authority")) {
2616 const cached_dir_t
*d
;
2617 int flags
= DGV_BY_ID
|
2618 (current
? DGV_INCLUDE_PREVIOUS
: DGV_INCLUDE_PENDING
);
2619 if ((d
=dirvote_get_vote(NULL
, flags
)))
2620 smartlist_add(dir_items
, (cached_dir_t
*)d
);
2622 const cached_dir_t
*d
;
2623 smartlist_t
*fps
= smartlist_create();
2625 if (!strcmpstart(url
, "d/")) {
2627 flags
= DGV_INCLUDE_PENDING
| DGV_INCLUDE_PREVIOUS
;
2630 (current
? DGV_INCLUDE_PREVIOUS
: DGV_INCLUDE_PENDING
);
2632 dir_split_resource_into_fingerprints(url
, fps
, NULL
, 1, 1);
2633 SMARTLIST_FOREACH(fps
, char *, fp
, {
2634 if ((d
= dirvote_get_vote(fp
, flags
)))
2635 smartlist_add(dir_items
, (cached_dir_t
*)d
);
2638 smartlist_free(fps
);
2640 if (!smartlist_len(dir_items
) && !smartlist_len(items
)) {
2641 write_http_status_line(conn
, 404, "Not found");
2644 SMARTLIST_FOREACH(dir_items
, cached_dir_t
*, d
,
2645 body_len
+= compressed
? d
->dir_z_len
: d
->dir_len
);
2646 estimated_len
+= body_len
;
2647 SMARTLIST_FOREACH(items
, const char *, item
, {
2648 size_t ln
= strlen(item
);
2650 estimated_len
+= ln
/2;
2652 body_len
+= ln
; estimated_len
+= ln
;
2656 if (global_write_bucket_low(TO_CONN(conn
), estimated_len
, 2)) {
2657 write_http_status_line(conn
, 503, "Directory busy, try again later.");
2660 write_http_response_header(conn
, body_len
? body_len
: -1, compressed
,
2663 if (smartlist_len(items
)) {
2665 conn
->zlib_state
= tor_zlib_new(1, ZLIB_METHOD
);
2666 SMARTLIST_FOREACH(items
, const char *, c
,
2667 connection_write_to_buf_zlib(c
, strlen(c
), conn
, 0));
2668 connection_write_to_buf_zlib("", 0, conn
, 1);
2670 SMARTLIST_FOREACH(items
, const char *, c
,
2671 connection_write_to_buf(c
, strlen(c
), TO_CONN(conn
)));
2674 SMARTLIST_FOREACH(dir_items
, cached_dir_t
*, d
,
2675 connection_write_to_buf(compressed
? d
->dir_z
: d
->dir
,
2676 compressed
? d
->dir_z_len
: d
->dir_len
,
2680 smartlist_free(items
);
2681 smartlist_free(dir_items
);
2685 if (!strcmpstart(url
,"/tor/server/") ||
2686 (!options
->BridgeAuthoritativeDir
&&
2687 !options
->BridgeRelay
&& !strcmpstart(url
,"/tor/extra/"))) {
2690 const char *request_type
= NULL
;
2691 int cache_lifetime
= 0;
2692 int is_extra
= !strcmpstart(url
,"/tor/extra/");
2693 url
+= is_extra
? strlen("/tor/extra/") : strlen("/tor/server/");
2694 conn
->fingerprint_stack
= smartlist_create();
2695 res
= dirserv_get_routerdesc_fingerprints(conn
->fingerprint_stack
, url
,
2697 !connection_dir_is_encrypted(conn
),
2700 if (!strcmpstart(url
, "fp/")) {
2701 request_type
= compressed
?"/tor/server/fp.z":"/tor/server/fp";
2702 if (smartlist_len(conn
->fingerprint_stack
) == 1)
2703 cache_lifetime
= ROUTERDESC_CACHE_LIFETIME
;
2704 } else if (!strcmpstart(url
, "authority")) {
2705 request_type
= compressed
?"/tor/server/authority.z":
2706 "/tor/server/authority";
2707 cache_lifetime
= ROUTERDESC_CACHE_LIFETIME
;
2708 } else if (!strcmpstart(url
, "all")) {
2709 request_type
= compressed
?"/tor/server/all.z":"/tor/server/all";
2710 cache_lifetime
= FULL_DIR_CACHE_LIFETIME
;
2711 } else if (!strcmpstart(url
, "d/")) {
2712 request_type
= compressed
?"/tor/server/d.z":"/tor/server/d";
2713 if (smartlist_len(conn
->fingerprint_stack
) == 1)
2714 cache_lifetime
= ROUTERDESC_BY_DIGEST_CACHE_LIFETIME
;
2716 request_type
= "/tor/server/?";
2718 (void) request_type
; /* usable for note_request. */
2719 if (!strcmpstart(url
, "d/"))
2720 conn
->dir_spool_src
=
2721 is_extra
? DIR_SPOOL_EXTRA_BY_DIGEST
: DIR_SPOOL_SERVER_BY_DIGEST
;
2723 conn
->dir_spool_src
=
2724 is_extra
? DIR_SPOOL_EXTRA_BY_FP
: DIR_SPOOL_SERVER_BY_FP
;
2726 if (!dirserv_have_any_serverdesc(conn
->fingerprint_stack
,
2727 conn
->dir_spool_src
)) {
2733 write_http_status_line(conn
, 404, msg
);
2735 dlen
= dirserv_estimate_data_size(conn
->fingerprint_stack
,
2737 if (global_write_bucket_low(TO_CONN(conn
), dlen
, 2)) {
2738 log_info(LD_DIRSERV
,
2739 "Client asked for server descriptors, but we've been "
2740 "writing too many bytes lately. Sending 503 Dir busy.");
2741 write_http_status_line(conn
, 503, "Directory busy, try again later");
2742 conn
->dir_spool_src
= DIR_SPOOL_NONE
;
2745 write_http_response_header(conn
, -1, compressed
, cache_lifetime
);
2747 conn
->zlib_state
= tor_zlib_new(1, ZLIB_METHOD
);
2748 /* Prime the connection with some data. */
2749 connection_dirserv_flushed_some(conn
);
2754 if (!strcmpstart(url
,"/tor/keys/")) {
2755 smartlist_t
*certs
= smartlist_create();
2757 if (!strcmp(url
, "/tor/keys/all")) {
2758 authority_cert_get_all(certs
);
2759 } else if (!strcmp(url
, "/tor/keys/authority")) {
2760 authority_cert_t
*cert
= get_my_v3_authority_cert();
2762 smartlist_add(certs
, cert
);
2763 } else if (!strcmpstart(url
, "/tor/keys/fp/")) {
2764 smartlist_t
*fps
= smartlist_create();
2765 dir_split_resource_into_fingerprints(url
+strlen("/tor/keys/fp/"),
2767 SMARTLIST_FOREACH(fps
, char *, d
, {
2768 authority_cert_t
*c
= authority_cert_get_newest_by_id(d
);
2769 if (c
) smartlist_add(certs
, c
);
2772 smartlist_free(fps
);
2773 } else if (!strcmpstart(url
, "/tor/keys/sk/")) {
2774 smartlist_t
*fps
= smartlist_create();
2775 dir_split_resource_into_fingerprints(url
+strlen("/tor/keys/sk/"),
2777 SMARTLIST_FOREACH(fps
, char *, d
, {
2778 authority_cert_t
*c
= authority_cert_get_by_sk_digest(d
);
2779 if (c
) smartlist_add(certs
, c
);
2782 smartlist_free(fps
);
2783 } else if (!strcmpstart(url
, "/tor/keys/fp-sk/")) {
2784 smartlist_t
*fp_sks
= smartlist_create();
2785 dir_split_resource_into_fingerprint_pairs(url
+strlen("/tor/keys/fp-sk/"),
2787 SMARTLIST_FOREACH(fp_sks
, fp_pair_t
*, pair
, {
2788 authority_cert_t
*c
= authority_cert_get_by_digests(pair
->first
,
2790 if (c
) smartlist_add(certs
, c
);
2793 smartlist_free(fp_sks
);
2795 write_http_status_line(conn
, 400, "Bad request");
2798 if (!smartlist_len(certs
)) {
2799 write_http_status_line(conn
, 404, "Not found");
2802 SMARTLIST_FOREACH(certs
, authority_cert_t
*, c
,
2803 if (c
->cache_info
.published_on
< if_modified_since
)
2804 SMARTLIST_DEL_CURRENT(certs
, c
));
2805 if (!smartlist_len(certs
)) {
2806 write_http_status_line(conn
, 304, "Not modified");
2810 SMARTLIST_FOREACH(certs
, authority_cert_t
*, c
,
2811 len
+= c
->cache_info
.signed_descriptor_len
);
2813 if (global_write_bucket_low(TO_CONN(conn
), compressed
?len
/2:len
, 2)) {
2814 write_http_status_line(conn
, 503, "Directory busy, try again later.");
2818 write_http_response_header(conn
, compressed
?-1:len
, compressed
, 60*60);
2820 conn
->zlib_state
= tor_zlib_new(1, ZLIB_METHOD
);
2821 SMARTLIST_FOREACH(certs
, authority_cert_t
*, c
,
2822 connection_write_to_buf_zlib(c
->cache_info
.signed_descriptor_body
,
2823 c
->cache_info
.signed_descriptor_len
,
2825 connection_write_to_buf_zlib("", 0, conn
, 1);
2827 SMARTLIST_FOREACH(certs
, authority_cert_t
*, c
,
2828 connection_write_to_buf(c
->cache_info
.signed_descriptor_body
,
2829 c
->cache_info
.signed_descriptor_len
,
2833 smartlist_free(certs
);
2837 if (options
->HidServDirectoryV2
&&
2838 !strcmpstart(url
,"/tor/rendezvous2/")) {
2839 /* Handle v2 rendezvous descriptor fetch request. */
2841 const char *query
= url
+ strlen("/tor/rendezvous2/");
2842 if (strlen(query
) == REND_DESC_ID_V2_LEN_BASE32
) {
2843 log_info(LD_REND
, "Got a v2 rendezvous descriptor request for ID '%s'",
2845 switch (rend_cache_lookup_v2_desc_as_dir(query
, &descp
)) {
2847 write_http_response_header(conn
, strlen(descp
), 0, 0);
2848 connection_write_to_buf(descp
, strlen(descp
), TO_CONN(conn
));
2850 case 0: /* well-formed but not present */
2851 write_http_status_line(conn
, 404, "Not found");
2853 case -1: /* not well-formed */
2854 write_http_status_line(conn
, 400, "Bad request");
2857 } else { /* not well-formed */
2858 write_http_status_line(conn
, 400, "Bad request");
2863 if (options
->HSAuthoritativeDir
&& !strcmpstart(url
,"/tor/rendezvous/")) {
2864 /* rendezvous descriptor fetch */
2867 const char *query
= url
+strlen("/tor/rendezvous/");
2869 log_info(LD_REND
, "Handling rendezvous descriptor get");
2870 switch (rend_cache_lookup_desc(query
, 0, &descp
, &desc_len
)) {
2872 write_http_response_header_impl(conn
, desc_len
,
2873 "application/octet-stream",
2875 note_request("/tor/rendezvous?/", desc_len
);
2876 /* need to send descp separately, because it may include nuls */
2877 connection_write_to_buf(descp
, desc_len
, TO_CONN(conn
));
2878 /* report successful fetch to statistic */
2879 if (options
->HSAuthorityRecordStats
) {
2880 hs_usage_note_fetch_total(query
, time(NULL
));
2881 hs_usage_note_fetch_successful(query
, time(NULL
));
2884 case 0: /* well-formed but not present */
2885 write_http_status_line(conn
, 404, "Not found");
2886 /* report (unsuccessful) fetch to statistic */
2887 if (options
->HSAuthorityRecordStats
) {
2888 hs_usage_note_fetch_total(query
, time(NULL
));
2891 case -1: /* not well-formed */
2892 write_http_status_line(conn
, 400, "Bad request");
2898 if (options
->BridgeAuthoritativeDir
&&
2899 options
->BridgePassword
&&
2900 connection_dir_is_encrypted(conn
) &&
2901 !strcmp(url
,"/tor/networkstatus-bridges")) {
2903 char *secret
= alloc_http_authenticator(options
->BridgePassword
);
2905 header
= http_get_header(headers
, "Authorization: Basic ");
2907 /* now make sure the password is there and right */
2908 if (!header
|| strcmp(header
, secret
)) {
2909 write_http_status_line(conn
, 404, "Not found");
2917 /* all happy now. send an answer. */
2918 status
= networkstatus_getinfo_by_purpose("bridge", time(NULL
));
2919 dlen
= strlen(status
);
2920 write_http_response_header(conn
, dlen
, 0, 0);
2921 connection_write_to_buf(status
, dlen
, TO_CONN(conn
));
2926 if (!strcmpstart(url
,"/tor/bytes.txt")) {
2927 char *bytes
= directory_dump_request_log();
2928 size_t len
= strlen(bytes
);
2929 write_http_response_header(conn
, len
, 0, 0);
2930 connection_write_to_buf(bytes
, len
, TO_CONN(conn
));
2935 if (!strcmp(url
,"/tor/robots.txt")) { /* /robots.txt will have been
2936 rewritten to /tor/robots.txt */
2937 char robots
[] = "User-agent: *\r\nDisallow: /\r\n";
2938 size_t len
= strlen(robots
);
2939 write_http_response_header(conn
, len
, 0, ROBOTS_CACHE_LIFETIME
);
2940 connection_write_to_buf(robots
, len
, TO_CONN(conn
));
2944 if (!strcmp(url
,"/tor/dbg-stability.txt")) {
2945 const char *stability
;
2947 if (! authdir_mode_tests_reachability(options
) ||
2948 ! (stability
= rep_hist_get_router_stability_doc(time(NULL
)))) {
2949 write_http_status_line(conn
, 404, "Not found.");
2953 len
= strlen(stability
);
2954 write_http_response_header(conn
, len
, 0, 0);
2955 connection_write_to_buf(stability
, len
, TO_CONN(conn
));
2959 #if defined(EXPORTMALLINFO) && defined(HAVE_MALLOC_H) && defined(HAVE_MALLINFO)
2960 #define ADD_MALLINFO_LINE(x) do { \
2961 tor_snprintf(tmp, sizeof(tmp), "%s %d\n", #x, mi.x); \
2962 smartlist_add(lines, tor_strdup(tmp)); \
2965 if (!strcmp(url
,"/tor/mallinfo.txt") &&
2966 (tor_addr_eq_ipv4h(&conn
->_base
.addr
, 0x7f000001ul
))) {
2973 memset(&mi
, 0, sizeof(mi
));
2975 lines
= smartlist_create();
2977 ADD_MALLINFO_LINE(arena
)
2978 ADD_MALLINFO_LINE(ordblks
)
2979 ADD_MALLINFO_LINE(smblks
)
2980 ADD_MALLINFO_LINE(hblks
)
2981 ADD_MALLINFO_LINE(hblkhd
)
2982 ADD_MALLINFO_LINE(usmblks
)
2983 ADD_MALLINFO_LINE(fsmblks
)
2984 ADD_MALLINFO_LINE(uordblks
)
2985 ADD_MALLINFO_LINE(fordblks
)
2986 ADD_MALLINFO_LINE(keepcost
)
2988 result
= smartlist_join_strings(lines
, "", 0, NULL
);
2989 SMARTLIST_FOREACH(lines
, char *, cp
, tor_free(cp
));
2990 smartlist_free(lines
);
2992 len
= strlen(result
);
2993 write_http_response_header(conn
, len
, 0, 0);
2994 connection_write_to_buf(result
, len
, TO_CONN(conn
));
3000 /* we didn't recognize the url */
3001 write_http_status_line(conn
, 404, "Not found");
3008 /** Helper function: called when a dirserver gets a complete HTTP POST
3009 * request. Look for an uploaded server descriptor or rendezvous
3010 * service descriptor. On finding one, process it and write a
3011 * response into conn-\>outbuf. If the request is unrecognized, send a
3012 * 400. Always return 0. */
3014 directory_handle_command_post(dir_connection_t
*conn
, const char *headers
,
3015 const char *body
, size_t body_len
)
3018 or_options_t
*options
= get_options();
3020 log_debug(LD_DIRSERV
,"Received POST command.");
3022 conn
->_base
.state
= DIR_CONN_STATE_SERVER_WRITING
;
3024 if (parse_http_url(headers
, &url
) < 0) {
3025 write_http_status_line(conn
, 400, "Bad request");
3028 log_debug(LD_DIRSERV
,"rewritten url as '%s'.", url
);
3030 /* Handle v2 rendezvous service publish request. */
3031 if (options
->HidServDirectoryV2
&&
3032 !strcmpstart(url
,"/tor/rendezvous2/publish")) {
3033 switch (rend_cache_store_v2_desc_as_dir(body
)) {
3035 log_info(LD_REND
, "Rejected v2 rend descriptor (length %d) from %s "
3036 "since we're not currently a hidden service directory.",
3037 (int)body_len
, conn
->_base
.address
);
3038 write_http_status_line(conn
, 503, "Currently not acting as v2 "
3039 "hidden service directory");
3042 log_warn(LD_REND
, "Rejected v2 rend descriptor (length %d) from %s.",
3043 (int)body_len
, conn
->_base
.address
);
3044 write_http_status_line(conn
, 400,
3045 "Invalid v2 service descriptor rejected");
3048 write_http_status_line(conn
, 200, "Service descriptor (v2) stored");
3049 log_info(LD_REND
, "Handled v2 rendezvous descriptor post: accepted");
3054 if (!authdir_mode(options
)) {
3055 /* we just provide cached directories; we don't want to
3056 * receive anything. */
3057 write_http_status_line(conn
, 400, "Nonauthoritative directory does not "
3058 "accept posted server descriptors");
3062 if (authdir_mode_handles_descs(options
, -1) &&
3063 !strcmp(url
,"/tor/")) { /* server descriptor post */
3064 const char *msg
= "[None]";
3065 uint8_t purpose
= authdir_mode_bridge(options
) ?
3066 ROUTER_PURPOSE_BRIDGE
: ROUTER_PURPOSE_GENERAL
;
3067 was_router_added_t r
= dirserv_add_multiple_descriptors(body
, purpose
,
3068 conn
->_base
.address
, &msg
);
3070 if (WRA_WAS_ADDED(r
))
3071 dirserv_get_directory(); /* rebuild and write to disk */
3073 if (r
== ROUTER_ADDED_NOTIFY_GENERATOR
) {
3074 /* Accepted with a message. */
3075 log_info(LD_DIRSERV
,
3076 "Problematic router descriptor or extra-info from %s "
3078 conn
->_base
.address
, msg
);
3079 write_http_status_line(conn
, 400, msg
);
3080 } else if (r
== ROUTER_ADDED_SUCCESSFULLY
) {
3081 write_http_status_line(conn
, 200, msg
);
3082 } else if (WRA_WAS_OUTDATED(r
)) {
3083 write_http_response_header_impl(conn
, -1, NULL
, NULL
,
3084 "X-Descriptor-Not-New: Yes\r\n", -1);
3086 log_info(LD_DIRSERV
,
3087 "Rejected router descriptor or extra-info from %s "
3089 conn
->_base
.address
, msg
);
3090 write_http_status_line(conn
, 400, msg
);
3095 if (options
->HSAuthoritativeDir
&&
3096 !strcmpstart(url
,"/tor/rendezvous/publish")) {
3097 /* rendezvous descriptor post */
3098 log_info(LD_REND
, "Handling rendezvous descriptor post.");
3099 if (rend_cache_store(body
, body_len
, 1) < 0) {
3100 log_fn(LOG_PROTOCOL_WARN
, LD_DIRSERV
,
3101 "Rejected rend descriptor (length %d) from %s.",
3102 (int)body_len
, conn
->_base
.address
);
3103 write_http_status_line(conn
, 400,
3104 "Invalid v0 service descriptor rejected");
3106 write_http_status_line(conn
, 200, "Service descriptor (v0) stored");
3111 if (authdir_mode_v3(options
) &&
3112 !strcmp(url
,"/tor/post/vote")) { /* v3 networkstatus vote */
3113 const char *msg
= "OK";
3115 if (dirvote_add_vote(body
, &msg
, &status
)) {
3116 write_http_status_line(conn
, status
, "Vote stored");
3119 write_http_status_line(conn
, status
, msg
);
3124 if (authdir_mode_v3(options
) &&
3125 !strcmp(url
,"/tor/post/consensus-signature")) { /* sigs on consensus. */
3126 const char *msg
= NULL
;
3127 if (dirvote_add_signatures(body
, conn
->_base
.address
, &msg
)>=0) {
3128 write_http_status_line(conn
, 200, msg
?msg
:"Signatures stored");
3130 log_warn(LD_DIR
, "Unable to store signatures posted by %s: %s",
3131 conn
->_base
.address
, msg
?msg
:"???");
3132 write_http_status_line(conn
, 400, msg
?msg
:"Unable to store signatures");
3137 /* we didn't recognize the url */
3138 write_http_status_line(conn
, 404, "Not found");
3145 /** Called when a dirserver receives data on a directory connection;
3146 * looks for an HTTP request. If the request is complete, remove it
3147 * from the inbuf, try to process it; otherwise, leave it on the
3148 * buffer. Return a 0 on success, or -1 on error.
3151 directory_handle_command(dir_connection_t
*conn
)
3153 char *headers
=NULL
, *body
=NULL
;
3158 tor_assert(conn
->_base
.type
== CONN_TYPE_DIR
);
3160 switch (fetch_from_buf_http(conn
->_base
.inbuf
,
3161 &headers
, MAX_HEADERS_SIZE
,
3162 &body
, &body_len
, MAX_DIR_UL_SIZE
, 0)) {
3163 case -1: /* overflow */
3164 log_warn(LD_DIRSERV
,
3165 "Invalid input from address '%s'. Closing.",
3166 conn
->_base
.address
);
3169 log_debug(LD_DIRSERV
,"command not all here yet.");
3171 /* case 1, fall through */
3174 http_set_address_origin(headers
, TO_CONN(conn
));
3175 //log_debug(LD_DIRSERV,"headers %s, body %s.", headers, body);
3177 if (!strncasecmp(headers
,"GET",3))
3178 r
= directory_handle_command_get(conn
, headers
, body
, body_len
);
3179 else if (!strncasecmp(headers
,"POST",4))
3180 r
= directory_handle_command_post(conn
, headers
, body
, body_len
);
3182 log_fn(LOG_PROTOCOL_WARN
, LD_PROTOCOL
,
3183 "Got headers %s with unknown command. Closing.",
3188 tor_free(headers
); tor_free(body
);
3192 /** Write handler for directory connections; called when all data has
3193 * been flushed. Close the connection or wait for a response as
3197 connection_dir_finished_flushing(dir_connection_t
*conn
)
3200 tor_assert(conn
->_base
.type
== CONN_TYPE_DIR
);
3202 switch (conn
->_base
.state
) {
3203 case DIR_CONN_STATE_CLIENT_SENDING
:
3204 log_debug(LD_DIR
,"client finished sending command.");
3205 conn
->_base
.state
= DIR_CONN_STATE_CLIENT_READING
;
3206 connection_stop_writing(TO_CONN(conn
));
3208 case DIR_CONN_STATE_SERVER_WRITING
:
3209 log_debug(LD_DIRSERV
,"Finished writing server response. Closing.");
3210 connection_mark_for_close(TO_CONN(conn
));
3213 log_warn(LD_BUG
,"called in unexpected state %d.",
3215 tor_fragile_assert();
3221 /** Connected handler for directory connections: begin sending data to the
3224 connection_dir_finished_connecting(dir_connection_t
*conn
)
3227 tor_assert(conn
->_base
.type
== CONN_TYPE_DIR
);
3228 tor_assert(conn
->_base
.state
== DIR_CONN_STATE_CONNECTING
);
3230 log_debug(LD_HTTP
,"Dir connection to router %s:%u established.",
3231 conn
->_base
.address
,conn
->_base
.port
);
3233 conn
->_base
.state
= DIR_CONN_STATE_CLIENT_SENDING
; /* start flushing conn */
3237 /** Called when one or more networkstatus fetches have failed (with uppercase
3238 * fingerprints listed in <b>failed</b>). Mark those fingerprints as having
3239 * failed once, unless they failed with status code 503. */
3241 dir_networkstatus_download_failed(smartlist_t
*failed
, int status_code
)
3243 if (status_code
== 503)
3245 SMARTLIST_FOREACH(failed
, const char *, fp
,
3247 char digest
[DIGEST_LEN
];
3248 trusted_dir_server_t
*dir
;
3249 if (base16_decode(digest
, DIGEST_LEN
, fp
, strlen(fp
))<0) {
3250 log_warn(LD_BUG
, "Called with bad fingerprint in list: %s",
3254 dir
= router_get_trusteddirserver_by_digest(digest
);
3257 download_status_failed(&dir
->v2_ns_dl_status
, status_code
);
3261 /** Schedule for when servers should download things in general. */
3262 static const int server_dl_schedule
[] = {
3263 0, 0, 0, 60, 60, 60*2, 60*5, 60*15, INT_MAX
3265 /** Schedule for when clients should download things in general. */
3266 static const int client_dl_schedule
[] = {
3267 0, 0, 60, 60*5, 60*10, INT_MAX
3269 /** Schedule for when servers should download consensuses. */
3270 static const int server_consensus_dl_schedule
[] = {
3271 0, 0, 60, 60*5, 60*10, 60*30, 60*30, 60*30, 60*30, 60*30, 60*60, 60*60*2
3273 /** Schedule for when clients should download consensuses. */
3274 static const int client_consensus_dl_schedule
[] = {
3275 0, 0, 60, 60*5, 60*10, 60*30, 60*60, 60*60, 60*60, 60*60*3, 60*60*6, 60*60*12
3277 /** Schedule for when clients should download bridge descriptors. */
3278 static const int bridge_dl_schedule
[] = {
3279 60*60, 15*60, 15*60, 60*60
3282 /** Decide which download schedule we want to use, and then return a
3283 * pointer to it along with a pointer to its length. Helper function for
3284 * download_status_increment_failure() and download_status_reset(). */
3286 find_dl_schedule_and_len(download_status_t
*dls
, int server
,
3287 const int **schedule
, size_t *schedule_len
)
3289 switch (dls
->schedule
) {
3290 case DL_SCHED_GENERIC
:
3292 *schedule
= server_dl_schedule
;
3293 *schedule_len
= sizeof(server_dl_schedule
)/sizeof(int);
3295 *schedule
= client_dl_schedule
;
3296 *schedule_len
= sizeof(client_dl_schedule
)/sizeof(int);
3299 case DL_SCHED_CONSENSUS
:
3301 *schedule
= server_consensus_dl_schedule
;
3302 *schedule_len
= sizeof(server_consensus_dl_schedule
)/sizeof(int);
3304 *schedule
= client_consensus_dl_schedule
;
3305 *schedule_len
= sizeof(client_consensus_dl_schedule
)/sizeof(int);
3308 case DL_SCHED_BRIDGE
:
3309 *schedule
= bridge_dl_schedule
;
3310 *schedule_len
= sizeof(bridge_dl_schedule
)/sizeof(int);
3317 /** Called when an attempt to download <b>dls</b> has failed with HTTP status
3318 * <b>status_code</b>. Increment the failure count (if the code indicates a
3319 * real failure) and set <b>dls</b>-\>next_attempt_at to an appropriate time
3322 download_status_increment_failure(download_status_t
*dls
, int status_code
,
3323 const char *item
, int server
, time_t now
)
3325 const int *schedule
;
3326 size_t schedule_len
;
3329 if (status_code
!= 503 || server
) {
3330 if (dls
->n_download_failures
< IMPOSSIBLE_TO_DOWNLOAD
-1)
3331 ++dls
->n_download_failures
;
3334 find_dl_schedule_and_len(dls
, server
, &schedule
, &schedule_len
);
3336 if (dls
->n_download_failures
< schedule_len
)
3337 increment
= schedule
[dls
->n_download_failures
];
3338 else if (dls
->n_download_failures
== IMPOSSIBLE_TO_DOWNLOAD
)
3339 increment
= INT_MAX
;
3341 increment
= schedule
[schedule_len
-1];
3343 if (increment
< INT_MAX
)
3344 dls
->next_attempt_at
= now
+increment
;
3346 dls
->next_attempt_at
= TIME_MAX
;
3350 log_debug(LD_DIR
, "%s failed %d time(s); I'll try again immediately.",
3351 item
, (int)dls
->n_download_failures
);
3352 else if (dls
->next_attempt_at
< TIME_MAX
)
3353 log_debug(LD_DIR
, "%s failed %d time(s); I'll try again in %d seconds.",
3354 item
, (int)dls
->n_download_failures
,
3355 (int)(dls
->next_attempt_at
-now
));
3357 log_debug(LD_DIR
, "%s failed %d time(s); Giving up for a while.",
3358 item
, (int)dls
->n_download_failures
);
3360 return dls
->next_attempt_at
;
3363 /** Reset <b>dls</b> so that it will be considered downloadable
3364 * immediately, and/or to show that we don't need it anymore.
3366 * (We find the zeroth element of the download schedule, and set
3367 * next_attempt_at to be the appropriate offset from 'now'. In most
3368 * cases this means setting it to 'now', so the item will be immediately
3369 * downloadable; in the case of bridge descriptors, the zeroth element
3370 * is an hour from now.) */
3372 download_status_reset(download_status_t
*dls
)
3374 const int *schedule
;
3375 size_t schedule_len
;
3377 find_dl_schedule_and_len(dls
, get_options()->DirPort
,
3378 &schedule
, &schedule_len
);
3380 dls
->n_download_failures
= 0;
3381 dls
->next_attempt_at
= time(NULL
) + schedule
[0];
3384 /** Called when one or more routerdesc (or extrainfo, if <b>was_extrainfo</b>)
3385 * fetches have failed (with uppercase fingerprints listed in <b>failed</b>,
3386 * either as descriptor digests or as identity digests based on
3387 * <b>was_descriptor_digests</b>).
3390 dir_routerdesc_download_failed(smartlist_t
*failed
, int status_code
,
3392 int was_extrainfo
, int was_descriptor_digests
)
3394 char digest
[DIGEST_LEN
];
3395 time_t now
= time(NULL
);
3396 int server
= directory_fetches_from_authorities(get_options());
3397 if (!was_descriptor_digests
) {
3398 if (router_purpose
== ROUTER_PURPOSE_BRIDGE
) {
3399 tor_assert(!was_extrainfo
); /* not supported yet */
3400 SMARTLIST_FOREACH(failed
, const char *, cp
,
3402 if (base16_decode(digest
, DIGEST_LEN
, cp
, strlen(cp
))<0) {
3403 log_warn(LD_BUG
, "Malformed fingerprint in list: %s",
3407 retry_bridge_descriptor_fetch_directly(digest
);
3410 return; /* FFFF should implement for other-than-router-purpose someday */
3412 SMARTLIST_FOREACH(failed
, const char *, cp
,
3414 download_status_t
*dls
= NULL
;
3415 if (base16_decode(digest
, DIGEST_LEN
, cp
, strlen(cp
)) < 0) {
3416 log_warn(LD_BUG
, "Malformed fingerprint in list: %s", escaped(cp
));
3419 if (was_extrainfo
) {
3420 signed_descriptor_t
*sd
=
3421 router_get_by_extrainfo_digest(digest
);
3423 dls
= &sd
->ei_dl_status
;
3425 dls
= router_get_dl_status_by_descriptor_digest(digest
);
3427 if (!dls
|| dls
->n_download_failures
>= MAX_ROUTERDESC_DOWNLOAD_FAILURES
)
3429 download_status_increment_failure(dls
, status_code
, cp
, server
, now
);
3432 /* No need to relaunch descriptor downloads here: we already do it
3433 * every 10 or 60 seconds (FOO_DESCRIPTOR_RETRY_INTERVAL) in main.c. */
3436 /** Helper. Compare two fp_pair_t objects, and return -1, 0, or 1 as
3439 _compare_pairs(const void **a
, const void **b
)
3441 const fp_pair_t
*fp1
= *a
, *fp2
= *b
;
3443 if ((r
= memcmp(fp1
->first
, fp2
->first
, DIGEST_LEN
)))
3446 return memcmp(fp1
->second
, fp2
->second
, DIGEST_LEN
);
3449 /** Divide a string <b>res</b> of the form FP1-FP2+FP3-FP4...[.z], where each
3450 * FP is a hex-encoded fingerprint, into a sequence of distinct sorted
3451 * fp_pair_t. Skip malformed pairs. On success, return 0 and add those
3452 * fp_pair_t into <b>pairs_out</b>. On failure, return -1. */
3454 dir_split_resource_into_fingerprint_pairs(const char *res
,
3455 smartlist_t
*pairs_out
)
3457 smartlist_t
*pairs_tmp
= smartlist_create();
3458 smartlist_t
*pairs_result
= smartlist_create();
3460 smartlist_split_string(pairs_tmp
, res
, "+", 0, 0);
3461 if (smartlist_len(pairs_tmp
)) {
3462 char *last
= smartlist_get(pairs_tmp
,smartlist_len(pairs_tmp
)-1);
3463 size_t last_len
= strlen(last
);
3464 if (last_len
> 2 && !strcmp(last
+last_len
-2, ".z")) {
3465 last
[last_len
-2] = '\0';
3468 SMARTLIST_FOREACH_BEGIN(pairs_tmp
, char *, cp
) {
3469 if (strlen(cp
) != HEX_DIGEST_LEN
*2+1) {
3471 "Skipping digest pair %s with non-standard length.", escaped(cp
));
3472 } else if (cp
[HEX_DIGEST_LEN
] != '-') {
3474 "Skipping digest pair %s with missing dash.", escaped(cp
));
3477 if (base16_decode(pair
.first
, DIGEST_LEN
, cp
, HEX_DIGEST_LEN
)<0 ||
3478 base16_decode(pair
.second
,
3479 DIGEST_LEN
, cp
+HEX_DIGEST_LEN
+1, HEX_DIGEST_LEN
)<0) {
3480 log_info(LD_DIR
, "Skipping non-decodable digest pair %s", escaped(cp
));
3482 smartlist_add(pairs_result
, tor_memdup(&pair
, sizeof(pair
)));
3486 } SMARTLIST_FOREACH_END(cp
);
3487 smartlist_free(pairs_tmp
);
3490 smartlist_sort(pairs_result
, _compare_pairs
);
3491 smartlist_uniq(pairs_result
, _compare_pairs
, _tor_free
);
3493 smartlist_add_all(pairs_out
, pairs_result
);
3494 smartlist_free(pairs_result
);
3498 /** Given a directory <b>resource</b> request, containing zero
3499 * or more strings separated by plus signs, followed optionally by ".z", store
3500 * the strings, in order, into <b>fp_out</b>. If <b>compressed_out</b> is
3501 * non-NULL, set it to 1 if the resource ends in ".z", else set it to 0. If
3502 * decode_hex is true, then delete all elements that aren't hex digests, and
3503 * decode the rest. If sort_uniq is true, then sort the list and remove
3507 dir_split_resource_into_fingerprints(const char *resource
,
3508 smartlist_t
*fp_out
, int *compressed_out
,
3509 int decode_hex
, int sort_uniq
)
3511 smartlist_t
*fp_tmp
= smartlist_create();
3513 smartlist_split_string(fp_tmp
, resource
, "+", 0, 0);
3515 *compressed_out
= 0;
3516 if (smartlist_len(fp_tmp
)) {
3517 char *last
= smartlist_get(fp_tmp
,smartlist_len(fp_tmp
)-1);
3518 size_t last_len
= strlen(last
);
3519 if (last_len
> 2 && !strcmp(last
+last_len
-2, ".z")) {
3520 last
[last_len
-2] = '\0';
3522 *compressed_out
= 1;
3527 char *cp
, *d
= NULL
;
3528 for (i
= 0; i
< smartlist_len(fp_tmp
); ++i
) {
3529 cp
= smartlist_get(fp_tmp
, i
);
3530 if (strlen(cp
) != HEX_DIGEST_LEN
) {
3532 "Skipping digest %s with non-standard length.", escaped(cp
));
3533 smartlist_del_keeporder(fp_tmp
, i
--);
3536 d
= tor_malloc_zero(DIGEST_LEN
);
3537 if (base16_decode(d
, DIGEST_LEN
, cp
, HEX_DIGEST_LEN
)<0) {
3538 log_info(LD_DIR
, "Skipping non-decodable digest %s", escaped(cp
));
3539 smartlist_del_keeporder(fp_tmp
, i
--);
3542 smartlist_set(fp_tmp
, i
, d
);
3550 smartlist_t
*fp_tmp2
= smartlist_create();
3553 smartlist_sort_digests(fp_tmp
);
3555 smartlist_sort_strings(fp_tmp
);
3556 if (smartlist_len(fp_tmp
))
3557 smartlist_add(fp_tmp2
, smartlist_get(fp_tmp
, 0));
3558 for (i
= 1; i
< smartlist_len(fp_tmp
); ++i
) {
3559 char *cp
= smartlist_get(fp_tmp
, i
);
3560 char *last
= smartlist_get(fp_tmp2
, smartlist_len(fp_tmp2
)-1);
3562 if ((decode_hex
&& memcmp(cp
, last
, DIGEST_LEN
))
3563 || (!decode_hex
&& strcasecmp(cp
, last
)))
3564 smartlist_add(fp_tmp2
, cp
);
3568 smartlist_free(fp_tmp
);
3571 smartlist_add_all(fp_out
, fp_tmp
);
3572 smartlist_free(fp_tmp
);