1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/media/mtransport/third_party/nICEr/src/ice/ice_parser.c Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,558 @@
1.4 +/*
1.5 +Copyright (c) 2007, Adobe Systems, Incorporated
1.6 +All rights reserved.
1.7 +
1.8 +Redistribution and use in source and binary forms, with or without
1.9 +modification, are permitted provided that the following conditions are
1.10 +met:
1.11 +
1.12 +* Redistributions of source code must retain the above copyright
1.13 + notice, this list of conditions and the following disclaimer.
1.14 +
1.15 +* Redistributions in binary form must reproduce the above copyright
1.16 + notice, this list of conditions and the following disclaimer in the
1.17 + documentation and/or other materials provided with the distribution.
1.18 +
1.19 +* Neither the name of Adobe Systems, Network Resonance nor the names of its
1.20 + contributors may be used to endorse or promote products derived from
1.21 + this software without specific prior written permission.
1.22 +
1.23 +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
1.24 +"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
1.25 +LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
1.26 +A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
1.27 +OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
1.28 +SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
1.29 +LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
1.30 +DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
1.31 +THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
1.32 +(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
1.33 +OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1.34 +*/
1.35 +
1.36 +
1.37 +
1.38 +static char *RCSSTRING __UNUSED__="$Id: ice_parser.c,v 1.2 2008/04/28 17:59:01 ekr Exp $";
1.39 +
1.40 +#include <csi_platform.h>
1.41 +#include <sys/types.h>
1.42 +#ifdef WIN32
1.43 +#include <winsock2.h>
1.44 +#else
1.45 +#include <sys/socket.h>
1.46 +#include <netinet/in.h>
1.47 +#include <arpa/inet.h>
1.48 +#include <strings.h>
1.49 +#endif
1.50 +#include <string.h>
1.51 +#include <assert.h>
1.52 +#include <ctype.h>
1.53 +#include "nr_api.h"
1.54 +#include "ice_ctx.h"
1.55 +#include "ice_candidate.h"
1.56 +#include "ice_reg.h"
1.57 +
1.58 +static void
1.59 +skip_whitespace(char **str)
1.60 +{
1.61 + char *c = *str;
1.62 + while (*c == ' ')
1.63 + ++c;
1.64 +
1.65 + *str = c;
1.66 +}
1.67 +
1.68 +static void
1.69 +fast_forward(char **str, int skip)
1.70 +{
1.71 + char *c = *str;
1.72 + while (*c != '\0' && skip-- > 0)
1.73 + ++c;
1.74 +
1.75 + *str = c;
1.76 +}
1.77 +
1.78 +static void
1.79 +skip_to_past_space(char **str)
1.80 +{
1.81 + char *c = *str;
1.82 + while (*c != ' ' && *c != '\0')
1.83 + ++c;
1.84 +
1.85 + *str = c;
1.86 +
1.87 + skip_whitespace(str);
1.88 +}
1.89 +
1.90 +static int
1.91 +grab_token(char **str, char **out)
1.92 +{
1.93 + int _status;
1.94 + char *c = *str;
1.95 + int len;
1.96 + char *tmp;
1.97 +
1.98 + while (*c != ' ' && *c != '\0')
1.99 + ++c;
1.100 +
1.101 + len = c - *str;
1.102 +
1.103 + tmp = RMALLOC(len + 1);
1.104 + if (!tmp)
1.105 + ABORT(R_NO_MEMORY);
1.106 +
1.107 + memcpy(tmp, *str, len);
1.108 + tmp[len] = '\0';
1.109 +
1.110 + *str = c;
1.111 + *out = tmp;
1.112 +
1.113 + _status = 0;
1.114 +abort:
1.115 + return _status;
1.116 +}
1.117 +
1.118 +int
1.119 +nr_ice_peer_candidate_from_attribute(nr_ice_ctx *ctx,char *orig,nr_ice_media_stream *stream,nr_ice_candidate **candp)
1.120 +{
1.121 + int r,_status;
1.122 + char* str = orig;
1.123 + nr_ice_candidate *cand;
1.124 + char *connection_address=0;
1.125 + unsigned int port;
1.126 + in_addr_t addr;
1.127 + int i;
1.128 + unsigned int component_id;
1.129 + char *rel_addr=0;
1.130 +
1.131 + if(!(cand=RCALLOC(sizeof(nr_ice_candidate))))
1.132 + ABORT(R_NO_MEMORY);
1.133 +
1.134 + if(!(cand->label=r_strdup(orig)))
1.135 + ABORT(R_NO_MEMORY);
1.136 +
1.137 + cand->ctx=ctx;
1.138 + cand->isock=0;
1.139 + cand->state=NR_ICE_CAND_PEER_CANDIDATE_UNPAIRED;
1.140 + cand->stream=stream;
1.141 + skip_whitespace(&str);
1.142 +
1.143 + /* Candidate attr */
1.144 + if (strncasecmp(str, "candidate:", 10))
1.145 + ABORT(R_BAD_DATA);
1.146 +
1.147 + fast_forward(&str, 10);
1.148 + if (*str == '\0')
1.149 + ABORT(R_BAD_DATA);
1.150 +
1.151 + skip_whitespace(&str);
1.152 + if (*str == '\0')
1.153 + ABORT(R_BAD_DATA);
1.154 +
1.155 + /* Foundation */
1.156 + if ((r=grab_token(&str, &cand->foundation)))
1.157 + ABORT(r);
1.158 +
1.159 + if (*str == '\0')
1.160 + ABORT(R_BAD_DATA);
1.161 +
1.162 + skip_whitespace(&str);
1.163 + if (*str == '\0')
1.164 + ABORT(R_BAD_DATA);
1.165 +
1.166 + /* component */
1.167 + if (sscanf(str, "%u", &component_id) != 1)
1.168 + ABORT(R_BAD_DATA);
1.169 +
1.170 + if (component_id < 1 || component_id > 256)
1.171 + ABORT(R_BAD_DATA);
1.172 +
1.173 + cand->component_id = (UCHAR)component_id;
1.174 +
1.175 + skip_to_past_space(&str);
1.176 + if (*str == '\0')
1.177 + ABORT(R_BAD_DATA);
1.178 +
1.179 + /* Protocol */
1.180 + if (strncasecmp(str, "UDP", 3))
1.181 + ABORT(R_BAD_DATA);
1.182 +
1.183 + fast_forward(&str, 3);
1.184 + if (*str == '\0')
1.185 + ABORT(R_BAD_DATA);
1.186 +
1.187 + skip_whitespace(&str);
1.188 + if (*str == '\0')
1.189 + ABORT(R_BAD_DATA);
1.190 +
1.191 + /* priority */
1.192 + if (sscanf(str, "%u", &cand->priority) != 1)
1.193 + ABORT(R_BAD_DATA);
1.194 +
1.195 + if (cand->priority < 1)
1.196 + ABORT(R_BAD_DATA);
1.197 +
1.198 + skip_to_past_space(&str);
1.199 + if (*str == '\0')
1.200 + ABORT(R_BAD_DATA);
1.201 +
1.202 + /* Peer address/port */
1.203 + if ((r=grab_token(&str, &connection_address)))
1.204 + ABORT(r);
1.205 +
1.206 + if (*str == '\0')
1.207 + ABORT(R_BAD_DATA);
1.208 +
1.209 + addr = inet_addr(connection_address);
1.210 + if (addr == INADDR_NONE)
1.211 + ABORT(R_BAD_DATA);
1.212 +
1.213 + skip_whitespace(&str);
1.214 + if (*str == '\0')
1.215 + ABORT(R_BAD_DATA);
1.216 +
1.217 + if (sscanf(str, "%u", &port) != 1)
1.218 + ABORT(R_BAD_DATA);
1.219 +
1.220 + if (port < 1 || port > 0x0FFFF)
1.221 + ABORT(R_BAD_DATA);
1.222 +
1.223 + /* Assume v4 for now */
1.224 + if(r=nr_ip4_port_to_transport_addr(ntohl(addr),port,IPPROTO_UDP,&cand->addr))
1.225 + ABORT(r);
1.226 +
1.227 + skip_to_past_space(&str);
1.228 + if (*str == '\0')
1.229 + ABORT(R_BAD_DATA);
1.230 +
1.231 + /* Type */
1.232 + if (strncasecmp("typ", str, 3))
1.233 + ABORT(R_BAD_DATA);
1.234 +
1.235 + fast_forward(&str, 3);
1.236 + if (*str == '\0')
1.237 + ABORT(R_BAD_DATA);
1.238 +
1.239 + skip_whitespace(&str);
1.240 + if (*str == '\0')
1.241 + ABORT(R_BAD_DATA);
1.242 +
1.243 + assert(nr_ice_candidate_type_names[0] == 0);
1.244 +#if __STDC_VERSION__ >= 201112L
1.245 + _Static_assert(nr_ice_candidate_type_names[0] == 0,"Candidate name array is misformatted");
1.246 +#endif
1.247 +
1.248 + for (i = 1; nr_ice_candidate_type_names[i]; ++i) {
1.249 + if(!strncasecmp(nr_ice_candidate_type_names[i], str, strlen(nr_ice_candidate_type_names[i]))) {
1.250 + cand->type=i;
1.251 + break;
1.252 + }
1.253 + }
1.254 + if (nr_ice_candidate_type_names[i] == 0)
1.255 + ABORT(R_BAD_DATA);
1.256 +
1.257 + fast_forward(&str, strlen(nr_ice_candidate_type_names[i]));
1.258 +
1.259 + /* Look for the other side's raddr, rport */
1.260 + /* raddr, rport */
1.261 + switch (cand->type) {
1.262 + case HOST:
1.263 + break;
1.264 + case SERVER_REFLEXIVE:
1.265 + case PEER_REFLEXIVE:
1.266 + case RELAYED:
1.267 +
1.268 + skip_whitespace(&str);
1.269 + if (*str == '\0')
1.270 + ABORT(R_BAD_DATA);
1.271 +
1.272 + if (strncasecmp("raddr", str, 5))
1.273 + ABORT(R_BAD_DATA);
1.274 +
1.275 + fast_forward(&str, 5);
1.276 + if (*str == '\0')
1.277 + ABORT(R_BAD_DATA);
1.278 +
1.279 + skip_whitespace(&str);
1.280 + if (*str == '\0')
1.281 + ABORT(R_BAD_DATA);
1.282 +
1.283 + if ((r=grab_token(&str, &rel_addr)))
1.284 + ABORT(r);
1.285 +
1.286 + if (*str == '\0')
1.287 + ABORT(R_BAD_DATA);
1.288 +
1.289 + addr = inet_addr(rel_addr);
1.290 + if (addr == INADDR_NONE)
1.291 + ABORT(R_BAD_DATA);
1.292 +
1.293 + skip_whitespace(&str);
1.294 + if (*str == '\0')
1.295 + ABORT(R_BAD_DATA);
1.296 +
1.297 + if (strncasecmp("rport", str, 5))
1.298 + ABORT(R_BAD_DATA);
1.299 +
1.300 + fast_forward(&str, 5);
1.301 + if (*str == '\0')
1.302 + ABORT(R_BAD_DATA);
1.303 +
1.304 + skip_whitespace(&str);
1.305 + if (*str == '\0')
1.306 + ABORT(R_BAD_DATA);
1.307 +
1.308 + if (sscanf(str, "%u", &port) != 1)
1.309 + ABORT(R_BAD_DATA);
1.310 +
1.311 + if (port < 1 || port > 0x0FFFF)
1.312 + ABORT(R_BAD_DATA);
1.313 +
1.314 + /* Assume v4 for now */
1.315 + if(r=nr_ip4_port_to_transport_addr(ntohl(addr),port,IPPROTO_UDP,&cand->base))
1.316 + ABORT(r);
1.317 +
1.318 + skip_to_past_space(&str);
1.319 + /* it's expected to be at EOD at this point */
1.320 +
1.321 + break;
1.322 + default:
1.323 + ABORT(R_INTERNAL);
1.324 + break;
1.325 + }
1.326 +
1.327 + skip_whitespace(&str);
1.328 +
1.329 + /* Ignore extensions per RFC 5245 S 15.1 */
1.330 +#if 0
1.331 + /* This used to be an assert, but we don't want to exit on invalid
1.332 + remote data */
1.333 + if (strlen(str) != 0) {
1.334 + ABORT(R_BAD_DATA);
1.335 + }
1.336 +#endif
1.337 +
1.338 + nr_ice_candidate_compute_codeword(cand);
1.339 +
1.340 + *candp=cand;
1.341 +
1.342 + _status=0;
1.343 + abort:
1.344 + if (_status){
1.345 + r_log(LOG_ICE,LOG_WARNING,"ICE(%s): Error parsing attribute: %s",ctx->label,orig);
1.346 + nr_ice_candidate_destroy(&cand);
1.347 + }
1.348 +
1.349 + RFREE(connection_address);
1.350 + RFREE(rel_addr);
1.351 + return(_status);
1.352 +}
1.353 +
1.354 +
1.355 +int
1.356 +nr_ice_peer_ctx_parse_media_stream_attribute(nr_ice_peer_ctx *pctx, nr_ice_media_stream *stream, char *attr)
1.357 +{
1.358 + int r,_status;
1.359 + char *orig = 0;
1.360 + char *str;
1.361 +
1.362 + orig = str = attr;
1.363 +
1.364 + if (!strncasecmp(str, "ice-ufrag:", 10)) {
1.365 + fast_forward(&str, 10);
1.366 + if (*str == '\0')
1.367 + ABORT(R_BAD_DATA);
1.368 +
1.369 + skip_whitespace(&str);
1.370 + if (*str == '\0')
1.371 + ABORT(R_BAD_DATA);
1.372 +
1.373 + if ((r=grab_token(&str, &stream->ufrag)))
1.374 + ABORT(r);
1.375 + }
1.376 + else if (!strncasecmp(str, "ice-pwd:", 8)) {
1.377 + fast_forward(&str, 8);
1.378 + if (*str == '\0')
1.379 + ABORT(R_BAD_DATA);
1.380 +
1.381 + skip_whitespace(&str);
1.382 + if (*str == '\0')
1.383 + ABORT(R_BAD_DATA);
1.384 +
1.385 + if ((r=grab_token(&str, &stream->pwd)))
1.386 + ABORT(r);
1.387 + }
1.388 + else {
1.389 + ABORT(R_BAD_DATA);
1.390 + }
1.391 +
1.392 + skip_whitespace(&str);
1.393 +
1.394 + /* RFC 5245 grammar doesn't have an extension point for ice-pwd or
1.395 + ice-ufrag: if there's anything left on the line, we treat it as bad. */
1.396 + if (str[0] != '\0') {
1.397 + ABORT(R_BAD_DATA);
1.398 + }
1.399 +
1.400 + _status=0;
1.401 + abort:
1.402 + if (_status) {
1.403 + if (orig)
1.404 + r_log(LOG_ICE,LOG_WARNING,"ICE-PEER(%s): Error parsing attribute: %s",pctx->label,orig);
1.405 + }
1.406 +
1.407 + return(_status);
1.408 +}
1.409 +
1.410 +int
1.411 +nr_ice_peer_ctx_parse_global_attributes(nr_ice_peer_ctx *pctx, char **attrs, int attr_ct)
1.412 +{
1.413 + int r,_status;
1.414 + int i;
1.415 + char *orig = 0;
1.416 + char *str;
1.417 + char *component_id = 0;
1.418 + char *connection_address = 0;
1.419 + unsigned int port;
1.420 + in_addr_t addr;
1.421 + char *ice_option_tag = 0;
1.422 +
1.423 + for(i=0;i<attr_ct;i++){
1.424 + orig = str = attrs[i];
1.425 +
1.426 + component_id = 0;
1.427 + connection_address = 0;
1.428 + ice_option_tag = 0;
1.429 +
1.430 + if (!strncasecmp(str, "remote-candidates:", 18)) {
1.431 + fast_forward(&str, 18);
1.432 + skip_whitespace(&str);
1.433 +
1.434 + while (*str != '\0') {
1.435 + if ((r=grab_token(&str, &component_id)))
1.436 + ABORT(r);
1.437 +
1.438 + if (*str == '\0')
1.439 + ABORT(R_BAD_DATA);
1.440 +
1.441 + skip_whitespace(&str);
1.442 + if (*str == '\0')
1.443 + ABORT(R_BAD_DATA);
1.444 +
1.445 + if ((r=grab_token(&str, &connection_address)))
1.446 + ABORT(r);
1.447 +
1.448 + if (*str == '\0')
1.449 + ABORT(R_BAD_DATA);
1.450 +
1.451 + addr = inet_addr(connection_address);
1.452 + if (addr == INADDR_NONE)
1.453 + ABORT(R_BAD_DATA);
1.454 +
1.455 + skip_whitespace(&str);
1.456 + if (*str == '\0')
1.457 + ABORT(R_BAD_DATA);
1.458 +
1.459 + if (sscanf(str, "%u", &port) != 1)
1.460 + ABORT(R_BAD_DATA);
1.461 +
1.462 + if (port < 1 || port > 0x0FFFF)
1.463 + ABORT(R_BAD_DATA);
1.464 +
1.465 + skip_to_past_space(&str);
1.466 +
1.467 +#if 0
1.468 + /* TODO: !nn! just drop on the floor for now, later put somewhere */
1.469 + /* Assume v4 for now */
1.470 + if(r=nr_ip4_port_to_transport_addr(ntohl(addr),port,IPPROTO_UDP,&candidate->base))
1.471 + ABORT(r);
1.472 +
1.473 + TAILQ_INSERT_TAIL(head, elm, field);
1.474 +#endif
1.475 +
1.476 + component_id = 0; /* prevent free */
1.477 + RFREE(connection_address);
1.478 + connection_address = 0; /* prevent free */
1.479 + }
1.480 + }
1.481 + else if (!strncasecmp(str, "ice-lite", 8)) {
1.482 + pctx->peer_lite = 1;
1.483 +
1.484 + fast_forward(&str, 8);
1.485 + }
1.486 + else if (!strncasecmp(str, "ice-mismatch", 12)) {
1.487 + pctx->peer_ice_mismatch = 1;
1.488 +
1.489 + fast_forward(&str, 12);
1.490 + }
1.491 + else if (!strncasecmp(str, "ice-ufrag:", 10)) {
1.492 + fast_forward(&str, 10);
1.493 + if (*str == '\0')
1.494 + ABORT(R_BAD_DATA);
1.495 +
1.496 + skip_whitespace(&str);
1.497 + if (*str == '\0')
1.498 + ABORT(R_BAD_DATA);
1.499 +
1.500 + RFREE(pctx->peer_ufrag);
1.501 + pctx->peer_ufrag = 0;
1.502 + if ((r=grab_token(&str, &pctx->peer_ufrag)))
1.503 + ABORT(r);
1.504 + }
1.505 + else if (!strncasecmp(str, "ice-pwd:", 8)) {
1.506 + fast_forward(&str, 8);
1.507 + if (*str == '\0')
1.508 + ABORT(R_BAD_DATA);
1.509 +
1.510 + skip_whitespace(&str);
1.511 + if (*str == '\0')
1.512 + ABORT(R_BAD_DATA);
1.513 +
1.514 + RFREE(pctx->peer_pwd);
1.515 + pctx->peer_pwd = 0;
1.516 + if ((r=grab_token(&str, &pctx->peer_pwd)))
1.517 + ABORT(r);
1.518 + }
1.519 + else if (!strncasecmp(str, "ice-options:", 12)) {
1.520 + fast_forward(&str, 12);
1.521 + skip_whitespace(&str);
1.522 +
1.523 + while (*str != '\0') {
1.524 + if ((r=grab_token(&str, &ice_option_tag)))
1.525 + ABORT(r);
1.526 +
1.527 + skip_whitespace(&str);
1.528 +
1.529 + //TODO: for now, just throw away; later put somewhere
1.530 + RFREE(ice_option_tag);
1.531 +
1.532 + ice_option_tag = 0; /* prevent free */
1.533 + }
1.534 + }
1.535 + else {
1.536 + ABORT(R_BAD_DATA);
1.537 + }
1.538 +
1.539 + skip_whitespace(&str);
1.540 +
1.541 + /* RFC 5245 grammar doesn't have an extension point for any of the
1.542 + preceding attributes: if there's anything left on the line, we
1.543 + treat it as bad data. */
1.544 + if (str[0] != '\0') {
1.545 + ABORT(R_BAD_DATA);
1.546 + }
1.547 + }
1.548 +
1.549 + _status=0;
1.550 + abort:
1.551 + if (_status) {
1.552 + if (orig)
1.553 + r_log(LOG_ICE,LOG_WARNING,"ICE-PEER(%s): Error parsing attribute: %s",pctx->label,orig);
1.554 + }
1.555 +
1.556 + RFREE(connection_address);
1.557 + RFREE(component_id);
1.558 + RFREE(ice_option_tag);
1.559 + return(_status);
1.560 +}
1.561 +
