Tor 0.4.9.0-alpha-dev
ext_orport.c
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1/* Copyright (c) 2012-2021, The Tor Project, Inc. */
2/* See LICENSE for licensing information */
3
4/**
5 * \file ext_orport.c
6 * \brief Code implementing the Extended ORPort.
7 *
8 * The Extended ORPort interface is used by pluggable transports to
9 * communicate additional information to a Tor bridge, including
10 * address information. For more information on this interface,
11 * see pt-spec.txt in torspec.git.
12 *
13 * There is no separate structure for extended ORPort connections; they use
14 * or_connection_t objects, and share most of their implementation with
15 * connection_or.c. Once the handshake is done, an extended ORPort connection
16 * turns into a regular OR connection, using connection_ext_or_transition().
17 */
18
19#define EXT_ORPORT_PRIVATE
20#include "core/or/or.h"
24#include "app/config/config.h"
30
32
33/** Allocate and return a structure capable of holding an Extended
34 * ORPort message of body length <b>len</b>. */
36ext_or_cmd_new(uint16_t len)
37{
38 size_t size = offsetof(ext_or_cmd_t, body) + len;
39 ext_or_cmd_t *cmd = tor_malloc(size);
40 cmd->len = len;
41 return cmd;
42}
43
44/** Deallocate the Extended ORPort message in <b>cmd</b>. */
45void
47{
48 tor_free(cmd);
49}
50
51/** Get an Extended ORPort message from <b>conn</b>, and place it in
52 * <b>out</b>. Return -1 on fail, 0 if we need more data, and 1 if we
53 * successfully extracted an Extended ORPort command from the
54 * buffer. */
55static int
57{
58 return fetch_ext_or_command_from_buf(conn->inbuf, out);
59}
60
61/** Write an Extended ORPort message to <b>conn</b>. Use
62 * <b>command</b> as the command type, <b>bodylen</b> as the body
63 * length, and <b>body</b>, if it's present, as the body of the
64 * message. */
65STATIC int
67 uint16_t command,
68 const char *body,
69 size_t bodylen)
70{
71 char header[4];
72 if (bodylen > UINT16_MAX)
73 return -1;
74 set_uint16(header, htons(command));
75 set_uint16(header+2, htons(bodylen));
76 connection_buf_add(header, 4, conn);
77 if (bodylen) {
78 tor_assert(body);
79 connection_buf_add(body, bodylen, conn);
80 }
81 return 0;
82}
83
84/** Transition from an Extended ORPort which accepts Extended ORPort
85 * messages, to an Extended ORport which accepts OR traffic. */
86static void
88{
89 tor_assert(conn->base_.type == CONN_TYPE_EXT_OR);
90
91 conn->base_.type = CONN_TYPE_OR;
92 TO_CONN(conn)->state = 0; // set the state to a neutral value
93 connection_or_event_status(conn, OR_CONN_EVENT_NEW, 0);
95}
96
97/** Length of authentication cookie. */
98#define EXT_OR_PORT_AUTH_COOKIE_LEN 32
99/** Length of the header of the cookie file. */
100#define EXT_OR_PORT_AUTH_COOKIE_HEADER_LEN 32
101/** Static cookie file header. */
102#define EXT_OR_PORT_AUTH_COOKIE_HEADER "! Extended ORPort Auth Cookie !\x0a"
103/** Length of safe-cookie protocol hashes. */
104#define EXT_OR_PORT_AUTH_HASH_LEN DIGEST256_LEN
105/** Length of safe-cookie protocol nonces. */
106#define EXT_OR_PORT_AUTH_NONCE_LEN 32
107/** Safe-cookie protocol constants. */
108#define EXT_OR_PORT_AUTH_SERVER_TO_CLIENT_CONST \
109 "ExtORPort authentication server-to-client hash"
110#define EXT_OR_PORT_AUTH_CLIENT_TO_SERVER_CONST \
111 "ExtORPort authentication client-to-server hash"
112
113/* Code to indicate cookie authentication */
114#define EXT_OR_AUTHTYPE_SAFECOOKIE 0x01
115
116/** If true, we've set ext_or_auth_cookie to a secret code and stored
117 * it to disk. */
119/** If ext_or_auth_cookie_is_set, a secret cookie that we've stored to disk
120 * and which we're using to authenticate controllers. (If the controller can
121 * read it off disk, it has permission to connect.) */
123
124/** Helper: Return a newly allocated string containing a path to the
125 * file where we store our authentication cookie. */
126char *
128{
129 const or_options_t *options = get_options();
130 if (options->ExtORPortCookieAuthFile &&
131 strlen(options->ExtORPortCookieAuthFile)) {
132 return tor_strdup(options->ExtORPortCookieAuthFile);
133 } else {
134 return get_datadir_fname("extended_orport_auth_cookie");
135 }
136}
137
138/* Initialize the cookie-based authentication system of the
139 * Extended ORPort. If <b>is_enabled</b> is 0, then disable the cookie
140 * authentication system. */
141int
142init_ext_or_cookie_authentication(int is_enabled)
143{
144 char *fname = NULL;
145 int retval;
146
147 if (!is_enabled) {
149 return 0;
150 }
151
155 get_options()->ExtORPortCookieAuthFileGroupReadable,
158 tor_free(fname);
159 return retval;
160}
161
162/** Read data from <b>conn</b> and see if the client sent us the
163 * authentication type that they prefer to use in this session.
164 *
165 * Return -1 if we received corrupted data or if we don't support the
166 * authentication type. Return 0 if we need more data in
167 * <b>conn</b>. Return 1 if the authentication type negotiation was
168 * successful. */
169static int
171{
172 char authtype[1] = {0};
173
174 if (connection_get_inbuf_len(conn) < 1)
175 return 0;
176
177 if (connection_buf_get_bytes(authtype, 1, conn) < 0)
178 return -1;
179
180 log_debug(LD_GENERAL, "Client wants us to use %d auth type", authtype[0]);
181 if (authtype[0] != EXT_OR_AUTHTYPE_SAFECOOKIE) {
182 /* '1' is the only auth type supported atm */
183 return -1;
184 }
185
187 return 1;
188}
189
190/* DOCDOC */
191STATIC int
192handle_client_auth_nonce(const char *client_nonce, size_t client_nonce_len,
193 char **client_hash_out,
194 char **reply_out, size_t *reply_len_out)
195{
196 char server_hash[EXT_OR_PORT_AUTH_HASH_LEN] = {0};
197 char server_nonce[EXT_OR_PORT_AUTH_NONCE_LEN] = {0};
198 char *reply;
199 size_t reply_len;
200
201 if (client_nonce_len != EXT_OR_PORT_AUTH_NONCE_LEN)
202 return -1;
203
204 /* Get our nonce */
206
207 { /* set up macs */
208 size_t hmac_s_msg_len = strlen(EXT_OR_PORT_AUTH_SERVER_TO_CLIENT_CONST) +
210 size_t hmac_c_msg_len = strlen(EXT_OR_PORT_AUTH_CLIENT_TO_SERVER_CONST) +
212
213 char *hmac_s_msg = tor_malloc_zero(hmac_s_msg_len);
214 char *hmac_c_msg = tor_malloc_zero(hmac_c_msg_len);
215 char *correct_client_hash = tor_malloc_zero(EXT_OR_PORT_AUTH_HASH_LEN);
216
217 memcpy(hmac_s_msg,
220 memcpy(hmac_s_msg + strlen(EXT_OR_PORT_AUTH_SERVER_TO_CLIENT_CONST),
221 client_nonce, EXT_OR_PORT_AUTH_NONCE_LEN);
222 memcpy(hmac_s_msg + strlen(EXT_OR_PORT_AUTH_SERVER_TO_CLIENT_CONST) +
224 server_nonce, EXT_OR_PORT_AUTH_NONCE_LEN);
225
226 memcpy(hmac_c_msg,
227 EXT_OR_PORT_AUTH_CLIENT_TO_SERVER_CONST,
228 strlen(EXT_OR_PORT_AUTH_CLIENT_TO_SERVER_CONST));
229 memcpy(hmac_c_msg + strlen(EXT_OR_PORT_AUTH_CLIENT_TO_SERVER_CONST),
230 client_nonce, EXT_OR_PORT_AUTH_NONCE_LEN);
231 memcpy(hmac_c_msg + strlen(EXT_OR_PORT_AUTH_CLIENT_TO_SERVER_CONST) +
233 server_nonce, EXT_OR_PORT_AUTH_NONCE_LEN);
234
235 crypto_hmac_sha256(server_hash,
236 (char*)ext_or_auth_cookie,
238 hmac_s_msg,
239 hmac_s_msg_len);
240
241 crypto_hmac_sha256(correct_client_hash,
242 (char*)ext_or_auth_cookie,
244 hmac_c_msg,
245 hmac_c_msg_len);
246
247 /* Store the client hash we generated. We will need to compare it
248 with the hash sent by the client. */
249 *client_hash_out = correct_client_hash;
250
251 memwipe(hmac_s_msg, 0, hmac_s_msg_len);
252 memwipe(hmac_c_msg, 0, hmac_c_msg_len);
253
254 tor_free(hmac_s_msg);
255 tor_free(hmac_c_msg);
256 }
257
258 { /* debug logging */ /* XXX disable this codepath if not logging on debug?*/
259 char server_hash_encoded[(2*EXT_OR_PORT_AUTH_HASH_LEN) + 1];
260 char server_nonce_encoded[(2*EXT_OR_PORT_AUTH_NONCE_LEN) + 1];
261 char client_nonce_encoded[(2*EXT_OR_PORT_AUTH_NONCE_LEN) + 1];
262
263 base16_encode(server_hash_encoded, sizeof(server_hash_encoded),
264 server_hash, sizeof(server_hash));
265 base16_encode(server_nonce_encoded, sizeof(server_nonce_encoded),
266 server_nonce, sizeof(server_nonce));
267 base16_encode(client_nonce_encoded, sizeof(client_nonce_encoded),
268 client_nonce, EXT_OR_PORT_AUTH_NONCE_LEN);
269
270 log_debug(LD_GENERAL,
271 "server_hash: '%s'\nserver_nonce: '%s'\nclient_nonce: '%s'",
272 server_hash_encoded, server_nonce_encoded, client_nonce_encoded);
273
274 memwipe(server_hash_encoded, 0, sizeof(server_hash_encoded));
275 memwipe(server_nonce_encoded, 0, sizeof(server_nonce_encoded));
276 memwipe(client_nonce_encoded, 0, sizeof(client_nonce_encoded));
277 }
278
279 { /* write reply: (server_hash, server_nonce) */
280
282 reply = tor_malloc_zero(reply_len);
283 memcpy(reply, server_hash, EXT_OR_PORT_AUTH_HASH_LEN);
284 memcpy(reply + EXT_OR_PORT_AUTH_HASH_LEN, server_nonce,
286 }
287
288 *reply_out = reply;
289 *reply_len_out = reply_len;
290
291 return 0;
292}
293
294/** Read the client's nonce out of <b>conn</b>, setup the safe-cookie
295 * crypto, and then send our own hash and nonce to the client
296 *
297 * Return -1 if there was an error; return 0 if we need more data in
298 * <b>conn</b>, and return 1 if we successfully retrieved the
299 * client's nonce and sent our own. */
300static int
302{
303 char client_nonce[EXT_OR_PORT_AUTH_NONCE_LEN];
304 char *reply=NULL;
305 size_t reply_len=0;
306
307 if (!ext_or_auth_cookie_is_set) { /* this should not happen */
308 log_warn(LD_BUG, "Extended ORPort authentication cookie was not set. "
309 "That's weird since we should have done that on startup. "
310 "This might be a Tor bug, please file a bug report. ");
311 return -1;
312 }
313
314 if (connection_get_inbuf_len(conn) < EXT_OR_PORT_AUTH_NONCE_LEN)
315 return 0;
316
317 if (connection_buf_get_bytes(client_nonce,
319 return -1;
320
321 /* We extract the ClientNonce from the received data, and use it to
322 calculate ServerHash and ServerNonce according to proposal 217.
323
324 We also calculate our own ClientHash value and save it in the
325 connection state. We validate it later against the ClientHash
326 sent by the client. */
327 if (handle_client_auth_nonce(client_nonce, sizeof(client_nonce),
328 &TO_OR_CONN(conn)->ext_or_auth_correct_client_hash,
329 &reply, &reply_len) < 0)
330 return -1;
331
332 connection_buf_add(reply, reply_len, conn);
333
334 memwipe(reply, 0, reply_len);
335 tor_free(reply);
336
337 log_debug(LD_GENERAL, "Got client nonce, and sent our own nonce and hash.");
338
340 return 1;
341}
342
343#define connection_ext_or_auth_send_result_success(c) \
344 connection_ext_or_auth_send_result(c, 1)
345#define connection_ext_or_auth_send_result_fail(c) \
346 connection_ext_or_auth_send_result(c, 0)
347
348/** Send authentication results to <b>conn</b>. Successful results if
349 * <b>success</b> is set; failure results otherwise. */
350static void
352{
353 if (success)
354 connection_buf_add("\x01", 1, conn);
355 else
356 connection_buf_add("\x00", 1, conn);
357}
358
359/** Receive the client's hash from <b>conn</b>, validate that it's
360 * correct, and then send the authentication results to the client.
361 *
362 * Return -1 if there was an error during validation; return 0 if we
363 * need more data in <b>conn</b>, and return 1 if we successfully
364 * validated the client's hash and sent a happy authentication
365 * result. */
366static int
368{
369 char provided_client_hash[EXT_OR_PORT_AUTH_HASH_LEN] = {0};
370
371 if (connection_get_inbuf_len(conn) < EXT_OR_PORT_AUTH_HASH_LEN)
372 return 0;
373
374 if (connection_buf_get_bytes(provided_client_hash,
375 EXT_OR_PORT_AUTH_HASH_LEN, conn) < 0)
376 return -1;
377
378 if (tor_memneq(TO_OR_CONN(conn)->ext_or_auth_correct_client_hash,
379 provided_client_hash, EXT_OR_PORT_AUTH_HASH_LEN)) {
380 log_warn(LD_GENERAL, "Incorrect client hash. Authentication failed.");
381 connection_ext_or_auth_send_result_fail(conn);
382 return -1;
383 }
384
385 log_debug(LD_GENERAL, "Got client's hash and it was legit.");
386
387 /* send positive auth result */
388 connection_ext_or_auth_send_result_success(conn);
390 return 1;
391}
392
393/** Handle data from <b>or_conn</b> received on Extended ORPort.
394 * Return -1 on error. 0 on insufficient data. 1 on correct. */
395static int
397{
398 connection_t *conn = TO_CONN(or_conn);
399
400 /* State transitions of the Extended ORPort authentication protocol:
401
402 EXT_OR_CONN_STATE_AUTH_WAIT_AUTH_TYPE (start state) ->
403 EXT_OR_CONN_STATE_AUTH_WAIT_CLIENT_NONCE ->
404 EXT_OR_CONN_STATE_AUTH_WAIT_CLIENT_HASH ->
405 EXT_OR_CONN_STATE_OPEN
406
407 During EXT_OR_CONN_STATE_OPEN, data is handled by
408 connection_ext_or_process_inbuf().
409 */
410
411 switch (conn->state) { /* Functionify */
414
417
420
421 default:
422 log_warn(LD_BUG, "Encountered unexpected connection state %d while trying "
423 "to process Extended ORPort authentication data.", conn->state);
424 return -1;
425 }
426}
427
428/** Extended ORPort commands (Transport-to-Bridge) */
429#define EXT_OR_CMD_TB_DONE 0x0000
430#define EXT_OR_CMD_TB_USERADDR 0x0001
431#define EXT_OR_CMD_TB_TRANSPORT 0x0002
432
433/** Extended ORPort commands (Bridge-to-Transport) */
434#define EXT_OR_CMD_BT_OKAY 0x1000
435#define EXT_OR_CMD_BT_DENY 0x1001
436#define EXT_OR_CMD_BT_CONTROL 0x1002
437
438/** Process a USERADDR command from the Extended
439 * ORPort. <b>payload</b> is a payload of size <b>len</b>.
440 *
441 * If the USERADDR command was well formed, change the address of
442 * <b>conn</b> to the address on the USERADDR command.
443 *
444 * Return 0 on success and -1 on error. */
445static int
447 const char *payload, uint16_t len)
448{
449 /* Copy address string. */
450 tor_addr_t addr;
451 uint16_t port;
452 char *addr_str;
453 char *address_part=NULL;
454 int res;
455 if (memchr(payload, '\0', len)) {
456 log_fn(LOG_PROTOCOL_WARN, LD_NET, "Unexpected NUL in ExtORPort UserAddr");
457 return -1;
458 }
459
460 addr_str = tor_memdup_nulterm(payload, len);
461
462 res = tor_addr_port_split(LOG_INFO, addr_str, &address_part, &port);
463 tor_free(addr_str);
464 if (res<0)
465 return -1;
466 if (port == 0) {
467 log_warn(LD_GENERAL, "Server transport proxy gave us an empty port "
468 "in ExtORPort UserAddr command.");
469 // return -1; // enable this if nothing breaks after a while.
470 }
471
472 res = tor_addr_parse(&addr, address_part);
473 tor_free(address_part);
474 if (res<0)
475 return -1;
476
477 { /* do some logging */
478 char *old_address = tor_addr_to_str_dup(&conn->addr);
479 char *new_address = tor_addr_to_str_dup(&addr);
480
481 log_debug(LD_NET, "Received USERADDR."
482 "We rewrite our address from '%s:%u' to '%s:%u'.",
483 safe_str(old_address), conn->port, safe_str(new_address), port);
484
485 tor_free(old_address);
486 tor_free(new_address);
487 }
488
489 /* record the address */
490 tor_addr_copy(&conn->addr, &addr);
491 conn->port = port;
492 if (conn->address) {
493 tor_free(conn->address);
494 }
495 conn->address = tor_addr_to_str_dup(&addr);
496
497 /* Now that we know the address, we don't have to manually override rate
498 * limiting. */
500
501 return 0;
502}
503
504/** Process a TRANSPORT command from the Extended
505 * ORPort. <b>payload</b> is a payload of size <b>len</b>.
506 *
507 * If the TRANSPORT command was well formed, register the name of the
508 * transport on <b>conn</b>.
509 *
510 * Return 0 on success and -1 on error. */
511static int
513 const char *payload, uint16_t len)
514{
515 char *transport_str;
516 if (memchr(payload, '\0', len)) {
517 log_fn(LOG_PROTOCOL_WARN, LD_NET, "Unexpected NUL in ExtORPort Transport");
518 return -1;
519 }
520
521 transport_str = tor_memdup_nulterm(payload, len);
522
523 /* Transport names MUST be C-identifiers. */
524 if (!string_is_C_identifier(transport_str)) {
525 tor_free(transport_str);
526 return -1;
527 }
528
529 /* If ext_or_transport is already occupied (because the PT sent two
530 * TRANSPORT commands), deallocate the old name and keep the new
531 * one */
532 if (conn->ext_or_transport)
534
535 conn->ext_or_transport = transport_str;
536 return 0;
537}
538
539#define EXT_OR_CONN_STATE_IS_AUTHENTICATING(st) \
540 ((st) <= EXT_OR_CONN_STATE_AUTH_MAX)
541
542/** Process Extended ORPort messages from <b>or_conn</b>. */
543int
545{
546 connection_t *conn = TO_CONN(or_conn);
548 int r;
549
550 /* DOCDOC Document the state machine and transitions in this function */
551
552 /* If we are still in the authentication stage, process traffic as
553 authentication data: */
554 while (EXT_OR_CONN_STATE_IS_AUTHENTICATING(conn->state)) {
555 log_debug(LD_GENERAL, "Got Extended ORPort authentication data (%u).",
556 (unsigned int) connection_get_inbuf_len(conn));
558 if (r < 0) {
559 connection_mark_for_close(conn);
560 return -1;
561 } else if (r == 0) {
562 return 0;
563 }
564 /* if r > 0, loop and process more data (if any). */
565 }
566
567 while (1) {
568 log_debug(LD_GENERAL, "Got Extended ORPort data.");
569 command = NULL;
571 if (r < 0)
572 goto err;
573 else if (r == 0)
574 return 0; /* need to wait for more data */
575
576 /* Got a command! */
578
579 if (command->cmd == EXT_OR_CMD_TB_DONE) {
580 if (connection_get_inbuf_len(conn)) {
581 /* The inbuf isn't empty; the client is misbehaving. */
582 goto err;
583 }
584
585 log_debug(LD_NET, "Received DONE.");
586
587 /* If the transport proxy did not use the TRANSPORT command to
588 * specify the transport name, mark this as unknown transport. */
589 if (!or_conn->ext_or_transport) {
590 /* We write this string this way to avoid ??>, which is a C
591 * trigraph. */
592 or_conn->ext_or_transport = tor_strdup("<?" "?>");
593 }
594
596
597 /* can't transition immediately; need to flush first. */
600 } else if (command->cmd == EXT_OR_CMD_TB_USERADDR) {
602 command->body, command->len) < 0)
603 goto err;
604 } else if (command->cmd == EXT_OR_CMD_TB_TRANSPORT) {
606 command->body, command->len) < 0)
607 goto err;
608 } else {
609 log_notice(LD_NET,"Got Extended ORPort command we don't recognize (%u).",
610 command->cmd);
611 }
612
613 ext_or_cmd_free(command);
614 }
615
616 return 0;
617
618 err:
619 ext_or_cmd_free(command);
620 connection_mark_for_close(conn);
621 return -1;
622}
623
624/** <b>conn</b> finished flushing Extended ORPort messages to the
625 * network, and is now ready to accept OR traffic. This function
626 * does the transition. */
627int
629{
630 if (conn->base_.state == EXT_OR_CONN_STATE_FLUSHING) {
633 }
634 return 0;
635}
636
637/** Initiate Extended ORPort authentication, by sending the list of
638 * supported authentication types to the client. */
639int
641{
642 connection_t *conn = TO_CONN(or_conn);
643 const uint8_t authtypes[] = {
644 /* We only support authtype '1' for now. */
645 EXT_OR_AUTHTYPE_SAFECOOKIE,
646 /* Marks the end of the list. */
647 0
648 };
649
650 log_debug(LD_GENERAL,
651 "ExtORPort authentication: Sending supported authentication types");
652
653 connection_buf_add((const char *)authtypes, sizeof(authtypes), conn);
655
656 return 0;
657}
658
659/** Free any leftover allocated memory of the ext_orport.c subsystem. */
660void
662{
663 if (ext_or_auth_cookie) /* Free the auth cookie */
665}
void tor_addr_copy(tor_addr_t *dest, const tor_addr_t *src)
Definition: address.c:933
int tor_addr_parse(tor_addr_t *addr, const char *src)
Definition: address.c:1349
int tor_addr_port_split(int severity, const char *addrport, char **address_out, uint16_t *port_out)
Definition: address.c:1916
char * tor_addr_to_str_dup(const tor_addr_t *addr)
Definition: address.c:1164
void base16_encode(char *dest, size_t destlen, const char *src, size_t srclen)
Definition: binascii.c:478
static void set_uint16(void *cp, uint16_t v)
Definition: bytes.h:78
const or_options_t * get_options(void)
Definition: config.c:944
tor_cmdline_mode_t command
Definition: config.c:2468
int init_cookie_authentication(const char *fname, const char *header, int cookie_len, int group_readable, uint8_t **cookie_out, int *cookie_is_set_out)
Definition: config.c:7485
Header file for config.c.
int connection_buf_get_bytes(char *string, size_t len, connection_t *conn)
Definition: connection.c:4324
Header file for connection.c.
#define CONN_TYPE_OR
Definition: connection.h:44
#define CONN_TYPE_EXT_OR
Definition: connection.h:71
void connection_or_event_status(or_connection_t *conn, or_conn_status_event_t tp, int reason)
or_connection_t * TO_OR_CONN(connection_t *c)
int connection_tls_start_handshake(or_connection_t *conn, int receiving)
Header file for connection_or.c.
Header file for control_events.c.
void crypto_hmac_sha256(char *hmac_out, const char *key, size_t key_len, const char *msg, size_t msg_len)
void crypto_rand(char *to, size_t n)
Definition: crypto_rand.c:479
Common functions for using (pseudo-)random number generators.
void memwipe(void *mem, uint8_t byte, size_t sz)
Definition: crypto_util.c:55
Common functions for cryptographic routines.
#define tor_memneq(a, b, sz)
Definition: di_ops.h:21
static void connection_ext_or_transition(or_connection_t *conn)
Definition: ext_orport.c:87
static int connection_ext_or_auth_handle_client_hash(connection_t *conn)
Definition: ext_orport.c:367
#define EXT_OR_PORT_AUTH_SERVER_TO_CLIENT_CONST
Definition: ext_orport.c:108
STATIC uint8_t * ext_or_auth_cookie
Definition: ext_orport.c:122
static int connection_ext_or_auth_process_inbuf(or_connection_t *or_conn)
Definition: ext_orport.c:396
STATIC int ext_or_auth_cookie_is_set
Definition: ext_orport.c:118
static void connection_ext_or_auth_send_result(connection_t *conn, int success)
Definition: ext_orport.c:351
char * get_ext_or_auth_cookie_file_name(void)
Definition: ext_orport.c:127
#define EXT_OR_PORT_AUTH_HASH_LEN
Definition: ext_orport.c:104
#define EXT_OR_PORT_AUTH_COOKIE_HEADER
Definition: ext_orport.c:102
static int connection_ext_or_auth_handle_client_nonce(connection_t *conn)
Definition: ext_orport.c:301
void ext_or_cmd_free_(ext_or_cmd_t *cmd)
Definition: ext_orport.c:46
static int connection_fetch_ext_or_cmd_from_buf(connection_t *conn, ext_or_cmd_t **out)
Definition: ext_orport.c:56
static int connection_ext_or_handle_cmd_transport(or_connection_t *conn, const char *payload, uint16_t len)
Definition: ext_orport.c:512
#define EXT_OR_PORT_AUTH_NONCE_LEN
Definition: ext_orport.c:106
int connection_ext_or_process_inbuf(or_connection_t *or_conn)
Definition: ext_orport.c:544
int connection_ext_or_start_auth(or_connection_t *or_conn)
Definition: ext_orport.c:640
static int connection_ext_or_auth_neg_auth_type(connection_t *conn)
Definition: ext_orport.c:170
static int connection_ext_or_handle_cmd_useraddr(connection_t *conn, const char *payload, uint16_t len)
Definition: ext_orport.c:446
#define EXT_OR_PORT_AUTH_COOKIE_LEN
Definition: ext_orport.c:98
#define EXT_OR_CMD_BT_OKAY
Definition: ext_orport.c:434
void ext_orport_free_all(void)
Definition: ext_orport.c:661
int connection_ext_or_finished_flushing(or_connection_t *conn)
Definition: ext_orport.c:628
ext_or_cmd_t * ext_or_cmd_new(uint16_t len)
Definition: ext_orport.c:36
STATIC int connection_write_ext_or_command(connection_t *conn, uint16_t command, const char *body, size_t bodylen)
Definition: ext_orport.c:66
#define EXT_OR_PORT_AUTH_COOKIE_HEADER_LEN
Definition: ext_orport.c:100
#define EXT_OR_CMD_TB_DONE
Definition: ext_orport.c:429
Header for ext_orport.c.
#define EXT_OR_CONN_STATE_AUTH_WAIT_CLIENT_HASH
Definition: ext_orport.h:24
#define EXT_OR_CONN_STATE_OPEN
Definition: ext_orport.h:28
#define EXT_OR_CONN_STATE_FLUSHING
Definition: ext_orport.h:31
#define EXT_OR_CONN_STATE_AUTH_WAIT_CLIENT_NONCE
Definition: ext_orport.h:22
#define EXT_OR_CONN_STATE_AUTH_WAIT_AUTH_TYPE
Definition: ext_orport.h:20
#define log_fn(severity, domain, args,...)
Definition: log.h:283
#define LD_BUG
Definition: log.h:86
#define LD_NET
Definition: log.h:66
#define LD_GENERAL
Definition: log.h:62
#define LOG_INFO
Definition: log.h:45
void connection_stop_reading(connection_t *conn)
Definition: mainloop.c:601
void connection_start_reading(connection_t *conn)
Definition: mainloop.c:623
Header file for mainloop.c.
#define tor_free(p)
Definition: malloc.h:56
Master header file for Tor-specific functionality.
#define TO_CONN(c)
Definition: or.h:612
OR connection structure.
int fetch_ext_or_command_from_buf(buf_t *buf, ext_or_cmd_t **out)
Definition: proto_ext_or.c:27
Header for proto_ext_or.c.
uint8_t state
Definition: connection_st.h:49
struct buf_t * inbuf
unsigned int type
Definition: connection_st.h:50
uint16_t port
unsigned int always_rate_limit_as_remote
Definition: connection_st.h:74
tor_addr_t addr
uint16_t len
Definition: proto_ext_or.h:20
char * ExtORPortCookieAuthFile
#define STATIC
Definition: testsupport.h:32
#define tor_assert(expr)
Definition: util_bug.h:103
int string_is_C_identifier(const char *string)
Definition: util_string.c:425