Alexandre Lision | 8af73cb | 2013-12-10 14:11:20 -0500 | [diff] [blame] | 1 | /* $Id$ */ |
| 2 | /* |
| 3 | * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com) |
| 4 | * Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 | */ |
| 20 | #include <pjsip/sip_parser.h> |
| 21 | #include <pjsip/sip_uri.h> |
| 22 | #include <pjsip/sip_msg.h> |
| 23 | #include <pjsip/sip_multipart.h> |
| 24 | #include <pjsip/sip_auth_parser.h> |
| 25 | #include <pjsip/sip_errno.h> |
| 26 | #include <pjsip/sip_transport.h> /* rdata structure */ |
| 27 | #include <pjlib-util/scanner.h> |
| 28 | #include <pjlib-util/string.h> |
| 29 | #include <pj/except.h> |
| 30 | #include <pj/log.h> |
| 31 | #include <pj/hash.h> |
| 32 | #include <pj/os.h> |
| 33 | #include <pj/pool.h> |
| 34 | #include <pj/string.h> |
| 35 | #include <pj/ctype.h> |
| 36 | #include <pj/assert.h> |
| 37 | |
| 38 | #define THIS_FILE "sip_parser.c" |
| 39 | |
| 40 | #define ALNUM |
| 41 | #define RESERVED ";/?:@&=+$," |
| 42 | #define MARK "-_.!~*'()" |
| 43 | #define UNRESERVED ALNUM MARK |
| 44 | #define ESCAPED "%" |
| 45 | #define USER_UNRESERVED "&=+$,;?/" |
| 46 | #define PASS "&=+$," |
| 47 | #define TOKEN "-.!%*_`'~+" /* '=' was removed for parsing |
| 48 | * param */ |
| 49 | #define HOST "_-." |
| 50 | #define HEX_DIGIT "abcdefABCDEF" |
| 51 | #define PARAM_CHAR "[]/:&+$" UNRESERVED ESCAPED |
| 52 | #define HNV_UNRESERVED "[]/?:+$" |
| 53 | #define HDR_CHAR HNV_UNRESERVED UNRESERVED ESCAPED |
| 54 | |
| 55 | /* A generic URI can consist of (For a complete BNF see RFC 2396): |
| 56 | #?;:@&=+-_.!~*'()%$,/ |
| 57 | */ |
| 58 | #define GENERIC_URI_CHARS "#?;:@&=+-_.!~*'()%$,/" "%" |
| 59 | |
| 60 | #define UNREACHED(expr) |
| 61 | |
| 62 | #define IS_NEWLINE(c) ((c)=='\r' || (c)=='\n') |
| 63 | #define IS_SPACE(c) ((c)==' ' || (c)=='\t') |
| 64 | |
| 65 | /* |
| 66 | * Header parser records. |
| 67 | */ |
| 68 | typedef struct handler_rec |
| 69 | { |
| 70 | char hname[PJSIP_MAX_HNAME_LEN+1]; |
| 71 | pj_size_t hname_len; |
| 72 | pj_uint32_t hname_hash; |
| 73 | pjsip_parse_hdr_func *handler; |
| 74 | } handler_rec; |
| 75 | |
| 76 | static handler_rec handler[PJSIP_MAX_HEADER_TYPES]; |
| 77 | static unsigned handler_count; |
| 78 | static int parser_is_initialized; |
| 79 | |
| 80 | /* |
| 81 | * URI parser records. |
| 82 | */ |
| 83 | typedef struct uri_parser_rec |
| 84 | { |
| 85 | pj_str_t scheme; |
| 86 | pjsip_parse_uri_func *parse; |
| 87 | } uri_parser_rec; |
| 88 | |
| 89 | static uri_parser_rec uri_handler[PJSIP_MAX_URI_TYPES]; |
| 90 | static unsigned uri_handler_count; |
| 91 | |
| 92 | /* |
| 93 | * Global vars (also extern). |
| 94 | */ |
| 95 | int PJSIP_SYN_ERR_EXCEPTION = -1; |
| 96 | |
| 97 | /* Parser constants */ |
| 98 | static pjsip_parser_const_t pconst = |
| 99 | { |
| 100 | { "user", 4}, /* pjsip_USER_STR */ |
| 101 | { "method", 6}, /* pjsip_METHOD_STR */ |
| 102 | { "transport", 9}, /* pjsip_TRANSPORT_STR */ |
| 103 | { "maddr", 5 }, /* pjsip_MADDR_STR */ |
| 104 | { "lr", 2 }, /* pjsip_LR_STR */ |
| 105 | { "sip", 3 }, /* pjsip_SIP_STR */ |
| 106 | { "sips", 4 }, /* pjsip_SIPS_STR */ |
| 107 | { "tel", 3 }, /* pjsip_TEL_STR */ |
| 108 | { "branch", 6 }, /* pjsip_BRANCH_STR */ |
| 109 | { "ttl", 3 }, /* pjsip_TTL_STR */ |
| 110 | { "received", 8 }, /* pjsip_RECEIVED_STR */ |
| 111 | { "q", 1 }, /* pjsip_Q_STR */ |
| 112 | { "expires", 7 }, /* pjsip_EXPIRES_STR */ |
| 113 | { "tag", 3 }, /* pjsip_TAG_STR */ |
| 114 | { "rport", 5} /* pjsip_RPORT_STR */ |
| 115 | }; |
| 116 | |
| 117 | /* Character Input Specification buffer. */ |
| 118 | static pj_cis_buf_t cis_buf; |
| 119 | |
| 120 | |
| 121 | /* |
| 122 | * Forward decl. |
| 123 | */ |
| 124 | static pjsip_msg * int_parse_msg( pjsip_parse_ctx *ctx, |
| 125 | pjsip_parser_err_report *err_list); |
| 126 | static void int_parse_param( pj_scanner *scanner, |
| 127 | pj_pool_t *pool, |
| 128 | pj_str_t *pname, |
| 129 | pj_str_t *pvalue, |
| 130 | unsigned option); |
| 131 | static void int_parse_uri_param( pj_scanner *scanner, |
| 132 | pj_pool_t *pool, |
| 133 | pj_str_t *pname, |
| 134 | pj_str_t *pvalue, |
| 135 | unsigned option); |
| 136 | static void int_parse_hparam( pj_scanner *scanner, |
| 137 | pj_pool_t *pool, |
| 138 | pj_str_t *hname, |
| 139 | pj_str_t *hvalue ); |
| 140 | static void int_parse_req_line( pj_scanner *scanner, |
| 141 | pj_pool_t *pool, |
| 142 | pjsip_request_line *req_line); |
| 143 | static int int_is_next_user( pj_scanner *scanner); |
| 144 | static void int_parse_status_line( pj_scanner *scanner, |
| 145 | pjsip_status_line *line); |
| 146 | static void int_parse_user_pass( pj_scanner *scanner, |
| 147 | pj_pool_t *pool, |
| 148 | pj_str_t *user, |
| 149 | pj_str_t *pass); |
| 150 | static void int_parse_uri_host_port( pj_scanner *scanner, |
| 151 | pj_str_t *p_host, |
| 152 | int *p_port); |
| 153 | static pjsip_uri * int_parse_uri_or_name_addr( pj_scanner *scanner, |
| 154 | pj_pool_t *pool, |
| 155 | unsigned option); |
| 156 | static void* int_parse_sip_url( pj_scanner *scanner, |
| 157 | pj_pool_t *pool, |
| 158 | pj_bool_t parse_params); |
| 159 | static pjsip_name_addr * |
| 160 | int_parse_name_addr( pj_scanner *scanner, |
| 161 | pj_pool_t *pool ); |
| 162 | static void* int_parse_other_uri(pj_scanner *scanner, |
| 163 | pj_pool_t *pool, |
| 164 | pj_bool_t parse_params); |
| 165 | static void parse_hdr_end( pj_scanner *scanner ); |
| 166 | |
| 167 | static pjsip_hdr* parse_hdr_accept( pjsip_parse_ctx *ctx ); |
| 168 | static pjsip_hdr* parse_hdr_allow( pjsip_parse_ctx *ctx ); |
| 169 | static pjsip_hdr* parse_hdr_call_id( pjsip_parse_ctx *ctx); |
| 170 | static pjsip_hdr* parse_hdr_contact( pjsip_parse_ctx *ctx); |
| 171 | static pjsip_hdr* parse_hdr_content_len( pjsip_parse_ctx *ctx ); |
| 172 | static pjsip_hdr* parse_hdr_content_type( pjsip_parse_ctx *ctx ); |
| 173 | static pjsip_hdr* parse_hdr_cseq( pjsip_parse_ctx *ctx ); |
| 174 | static pjsip_hdr* parse_hdr_expires( pjsip_parse_ctx *ctx ); |
| 175 | static pjsip_hdr* parse_hdr_from( pjsip_parse_ctx *ctx ); |
| 176 | static pjsip_hdr* parse_hdr_max_forwards( pjsip_parse_ctx *ctx); |
| 177 | static pjsip_hdr* parse_hdr_min_expires( pjsip_parse_ctx *ctx ); |
| 178 | static pjsip_hdr* parse_hdr_rr( pjsip_parse_ctx *ctx ); |
| 179 | static pjsip_hdr* parse_hdr_route( pjsip_parse_ctx *ctx ); |
| 180 | static pjsip_hdr* parse_hdr_require( pjsip_parse_ctx *ctx ); |
| 181 | static pjsip_hdr* parse_hdr_retry_after( pjsip_parse_ctx *ctx ); |
| 182 | static pjsip_hdr* parse_hdr_supported( pjsip_parse_ctx *ctx ); |
| 183 | static pjsip_hdr* parse_hdr_to( pjsip_parse_ctx *ctx ); |
| 184 | static pjsip_hdr* parse_hdr_unsupported( pjsip_parse_ctx *ctx ); |
| 185 | static pjsip_hdr* parse_hdr_via( pjsip_parse_ctx *ctx ); |
| 186 | static pjsip_hdr* parse_hdr_generic_string( pjsip_parse_ctx *ctx); |
| 187 | |
| 188 | /* Convert non NULL terminated string to integer. */ |
| 189 | static unsigned long pj_strtoul_mindigit(const pj_str_t *str, |
| 190 | unsigned mindig) |
| 191 | { |
| 192 | unsigned long value; |
| 193 | unsigned i; |
| 194 | |
| 195 | value = 0; |
| 196 | for (i=0; i<(unsigned)str->slen; ++i) { |
| 197 | value = value * 10 + (str->ptr[i] - '0'); |
| 198 | } |
| 199 | for (; i<mindig; ++i) { |
| 200 | value = value * 10; |
| 201 | } |
| 202 | return value; |
| 203 | } |
| 204 | |
| 205 | /* Case insensitive comparison */ |
| 206 | #define parser_stricmp(s1, s2) (s1.slen!=s2.slen || pj_stricmp_alnum(&s1, &s2)) |
| 207 | |
| 208 | |
| 209 | /* Get a token and unescape */ |
| 210 | PJ_INLINE(void) parser_get_and_unescape(pj_scanner *scanner, pj_pool_t *pool, |
| 211 | const pj_cis_t *spec, |
| 212 | const pj_cis_t *unesc_spec, |
| 213 | pj_str_t *token) |
| 214 | { |
| 215 | #if defined(PJSIP_UNESCAPE_IN_PLACE) && PJSIP_UNESCAPE_IN_PLACE!=0 |
| 216 | PJ_UNUSED_ARG(pool); |
| 217 | PJ_UNUSED_ARG(spec); |
| 218 | pj_scan_get_unescape(scanner, unesc_spec, token); |
| 219 | #else |
| 220 | PJ_UNUSED_ARG(unesc_spec); |
| 221 | pj_scan_get(scanner, spec, token); |
| 222 | *token = pj_str_unescape(pool, token); |
| 223 | #endif |
| 224 | } |
| 225 | |
| 226 | |
| 227 | |
| 228 | /* Syntax error handler for parser. */ |
| 229 | static void on_syntax_error(pj_scanner *scanner) |
| 230 | { |
| 231 | PJ_UNUSED_ARG(scanner); |
| 232 | PJ_THROW(PJSIP_SYN_ERR_EXCEPTION); |
| 233 | } |
| 234 | |
| 235 | /* Get parser constants. */ |
| 236 | PJ_DEF(const pjsip_parser_const_t*) pjsip_parser_const(void) |
| 237 | { |
| 238 | return &pconst; |
| 239 | } |
| 240 | |
| 241 | /* Concatenate unrecognized params into single string. */ |
| 242 | PJ_DEF(void) pjsip_concat_param_imp(pj_str_t *param, pj_pool_t *pool, |
| 243 | const pj_str_t *pname, |
| 244 | const pj_str_t *pvalue, |
| 245 | int sepchar) |
| 246 | { |
| 247 | char *new_param, *p; |
| 248 | pj_size_t len; |
| 249 | |
| 250 | len = param->slen + pname->slen + pvalue->slen + 3; |
| 251 | p = new_param = (char*) pj_pool_alloc(pool, len); |
| 252 | |
| 253 | if (param->slen) { |
| 254 | pj_size_t old_len = param->slen; |
| 255 | pj_memcpy(p, param->ptr, old_len); |
| 256 | p += old_len; |
| 257 | } |
| 258 | *p++ = (char)sepchar; |
| 259 | pj_memcpy(p, pname->ptr, pname->slen); |
| 260 | p += pname->slen; |
| 261 | |
| 262 | if (pvalue->slen) { |
| 263 | *p++ = '='; |
| 264 | pj_memcpy(p, pvalue->ptr, pvalue->slen); |
| 265 | p += pvalue->slen; |
| 266 | } |
| 267 | |
| 268 | *p = '\0'; |
| 269 | |
| 270 | param->ptr = new_param; |
| 271 | param->slen = p - new_param; |
| 272 | } |
| 273 | |
| 274 | /* Initialize static properties of the parser. */ |
| 275 | static pj_status_t init_parser() |
| 276 | { |
| 277 | pj_status_t status; |
| 278 | |
| 279 | /* |
| 280 | * Syntax error exception number. |
| 281 | */ |
| 282 | pj_assert (PJSIP_SYN_ERR_EXCEPTION == -1); |
| 283 | status = pj_exception_id_alloc("PJSIP syntax error", |
| 284 | &PJSIP_SYN_ERR_EXCEPTION); |
| 285 | PJ_ASSERT_RETURN(status == PJ_SUCCESS, status); |
| 286 | |
| 287 | /* |
| 288 | * Init character input spec (cis) |
| 289 | */ |
| 290 | |
| 291 | pj_cis_buf_init(&cis_buf); |
| 292 | |
| 293 | status = pj_cis_init(&cis_buf, &pconst.pjsip_DIGIT_SPEC); |
| 294 | PJ_ASSERT_RETURN(status == PJ_SUCCESS, status); |
| 295 | pj_cis_add_num(&pconst.pjsip_DIGIT_SPEC); |
| 296 | |
| 297 | status = pj_cis_init(&cis_buf, &pconst.pjsip_ALPHA_SPEC); |
| 298 | PJ_ASSERT_RETURN(status == PJ_SUCCESS, status); |
| 299 | pj_cis_add_alpha( &pconst.pjsip_ALPHA_SPEC ); |
| 300 | |
| 301 | status = pj_cis_init(&cis_buf, &pconst.pjsip_ALNUM_SPEC); |
| 302 | PJ_ASSERT_RETURN(status == PJ_SUCCESS, status); |
| 303 | pj_cis_add_alpha( &pconst.pjsip_ALNUM_SPEC ); |
| 304 | pj_cis_add_num( &pconst.pjsip_ALNUM_SPEC ); |
| 305 | |
| 306 | status = pj_cis_init(&cis_buf, &pconst.pjsip_NOT_NEWLINE); |
| 307 | PJ_ASSERT_RETURN(status == PJ_SUCCESS, status); |
| 308 | pj_cis_add_str(&pconst.pjsip_NOT_NEWLINE, "\r\n"); |
| 309 | pj_cis_invert(&pconst.pjsip_NOT_NEWLINE); |
| 310 | |
| 311 | status = pj_cis_init(&cis_buf, &pconst.pjsip_NOT_COMMA_OR_NEWLINE); |
| 312 | PJ_ASSERT_RETURN(status == PJ_SUCCESS, status); |
| 313 | pj_cis_add_str( &pconst.pjsip_NOT_COMMA_OR_NEWLINE, ",\r\n"); |
| 314 | pj_cis_invert(&pconst.pjsip_NOT_COMMA_OR_NEWLINE); |
| 315 | |
| 316 | status = pj_cis_dup(&pconst.pjsip_TOKEN_SPEC, &pconst.pjsip_ALNUM_SPEC); |
| 317 | PJ_ASSERT_RETURN(status == PJ_SUCCESS, status); |
| 318 | pj_cis_add_str( &pconst.pjsip_TOKEN_SPEC, TOKEN); |
| 319 | |
| 320 | status = pj_cis_dup(&pconst.pjsip_TOKEN_SPEC_ESC, &pconst.pjsip_TOKEN_SPEC); |
| 321 | PJ_ASSERT_RETURN(status == PJ_SUCCESS, status); |
| 322 | pj_cis_del_str(&pconst.pjsip_TOKEN_SPEC_ESC, "%"); |
| 323 | |
| 324 | status = pj_cis_dup(&pconst.pjsip_VIA_PARAM_SPEC, &pconst.pjsip_TOKEN_SPEC); |
| 325 | PJ_ASSERT_RETURN(status == PJ_SUCCESS, status); |
| 326 | pj_cis_add_str(&pconst.pjsip_VIA_PARAM_SPEC, ":"); |
| 327 | |
| 328 | status = pj_cis_dup(&pconst.pjsip_VIA_PARAM_SPEC_ESC, &pconst.pjsip_TOKEN_SPEC_ESC); |
| 329 | PJ_ASSERT_RETURN(status == PJ_SUCCESS, status); |
| 330 | pj_cis_add_str(&pconst.pjsip_VIA_PARAM_SPEC, ":"); |
| 331 | |
| 332 | status = pj_cis_dup(&pconst.pjsip_HOST_SPEC, &pconst.pjsip_ALNUM_SPEC); |
| 333 | PJ_ASSERT_RETURN(status == PJ_SUCCESS, status); |
| 334 | pj_cis_add_str( &pconst.pjsip_HOST_SPEC, HOST); |
| 335 | |
| 336 | status = pj_cis_dup(&pconst.pjsip_HEX_SPEC, &pconst.pjsip_DIGIT_SPEC); |
| 337 | PJ_ASSERT_RETURN(status == PJ_SUCCESS, status); |
| 338 | pj_cis_add_str( &pconst.pjsip_HEX_SPEC, HEX_DIGIT); |
| 339 | |
| 340 | status = pj_cis_dup(&pconst.pjsip_PARAM_CHAR_SPEC, &pconst.pjsip_ALNUM_SPEC); |
| 341 | PJ_ASSERT_RETURN(status == PJ_SUCCESS, status); |
| 342 | pj_cis_add_str(&pconst.pjsip_PARAM_CHAR_SPEC, PARAM_CHAR); |
| 343 | |
| 344 | status = pj_cis_dup(&pconst.pjsip_PARAM_CHAR_SPEC_ESC, &pconst.pjsip_PARAM_CHAR_SPEC); |
| 345 | PJ_ASSERT_RETURN(status == PJ_SUCCESS, status); |
| 346 | pj_cis_del_str(&pconst.pjsip_PARAM_CHAR_SPEC_ESC, ESCAPED); |
| 347 | |
| 348 | status = pj_cis_dup(&pconst.pjsip_HDR_CHAR_SPEC, &pconst.pjsip_ALNUM_SPEC); |
| 349 | PJ_ASSERT_RETURN(status == PJ_SUCCESS, status); |
| 350 | pj_cis_add_str(&pconst.pjsip_HDR_CHAR_SPEC, HDR_CHAR); |
| 351 | |
| 352 | status = pj_cis_dup(&pconst.pjsip_HDR_CHAR_SPEC_ESC, &pconst.pjsip_HDR_CHAR_SPEC); |
| 353 | PJ_ASSERT_RETURN(status == PJ_SUCCESS, status); |
| 354 | pj_cis_del_str(&pconst.pjsip_HDR_CHAR_SPEC_ESC, ESCAPED); |
| 355 | |
| 356 | status = pj_cis_dup(&pconst.pjsip_USER_SPEC, &pconst.pjsip_ALNUM_SPEC); |
| 357 | PJ_ASSERT_RETURN(status == PJ_SUCCESS, status); |
| 358 | pj_cis_add_str( &pconst.pjsip_USER_SPEC, UNRESERVED ESCAPED USER_UNRESERVED ); |
| 359 | |
| 360 | status = pj_cis_dup(&pconst.pjsip_USER_SPEC_ESC, &pconst.pjsip_USER_SPEC); |
| 361 | PJ_ASSERT_RETURN(status == PJ_SUCCESS, status); |
| 362 | pj_cis_del_str( &pconst.pjsip_USER_SPEC_ESC, ESCAPED); |
| 363 | |
| 364 | status = pj_cis_dup(&pconst.pjsip_USER_SPEC_LENIENT, &pconst.pjsip_USER_SPEC); |
| 365 | PJ_ASSERT_RETURN(status == PJ_SUCCESS, status); |
| 366 | pj_cis_add_str(&pconst.pjsip_USER_SPEC_LENIENT, "#"); |
| 367 | |
| 368 | status = pj_cis_dup(&pconst.pjsip_USER_SPEC_LENIENT_ESC, &pconst.pjsip_USER_SPEC_ESC); |
| 369 | PJ_ASSERT_RETURN(status == PJ_SUCCESS, status); |
| 370 | pj_cis_add_str(&pconst.pjsip_USER_SPEC_LENIENT_ESC, "#"); |
| 371 | |
| 372 | status = pj_cis_dup(&pconst.pjsip_PASSWD_SPEC, &pconst.pjsip_ALNUM_SPEC); |
| 373 | PJ_ASSERT_RETURN(status == PJ_SUCCESS, status); |
| 374 | pj_cis_add_str( &pconst.pjsip_PASSWD_SPEC, UNRESERVED ESCAPED PASS); |
| 375 | |
| 376 | status = pj_cis_dup(&pconst.pjsip_PASSWD_SPEC_ESC, &pconst.pjsip_PASSWD_SPEC); |
| 377 | PJ_ASSERT_RETURN(status == PJ_SUCCESS, status); |
| 378 | pj_cis_del_str( &pconst.pjsip_PASSWD_SPEC_ESC, ESCAPED); |
| 379 | |
| 380 | status = pj_cis_init(&cis_buf, &pconst.pjsip_PROBE_USER_HOST_SPEC); |
| 381 | PJ_ASSERT_RETURN(status == PJ_SUCCESS, status); |
| 382 | pj_cis_add_str( &pconst.pjsip_PROBE_USER_HOST_SPEC, "@ \n>"); |
| 383 | pj_cis_invert( &pconst.pjsip_PROBE_USER_HOST_SPEC ); |
| 384 | |
| 385 | status = pj_cis_init(&cis_buf, &pconst.pjsip_DISPLAY_SPEC); |
| 386 | PJ_ASSERT_RETURN(status == PJ_SUCCESS, status); |
| 387 | pj_cis_add_str( &pconst.pjsip_DISPLAY_SPEC, ":\r\n<"); |
| 388 | pj_cis_invert(&pconst.pjsip_DISPLAY_SPEC); |
| 389 | |
| 390 | status = pj_cis_dup(&pconst.pjsip_OTHER_URI_CONTENT, &pconst.pjsip_ALNUM_SPEC); |
| 391 | PJ_ASSERT_RETURN(status == PJ_SUCCESS, status); |
| 392 | pj_cis_add_str( &pconst.pjsip_OTHER_URI_CONTENT, GENERIC_URI_CHARS); |
| 393 | |
| 394 | /* |
| 395 | * Register URI parsers. |
| 396 | */ |
| 397 | |
| 398 | status = pjsip_register_uri_parser("sip", &int_parse_sip_url); |
| 399 | PJ_ASSERT_RETURN(status == PJ_SUCCESS, status); |
| 400 | |
| 401 | status = pjsip_register_uri_parser("sips", &int_parse_sip_url); |
| 402 | PJ_ASSERT_RETURN(status == PJ_SUCCESS, status); |
| 403 | |
| 404 | /* |
| 405 | * Register header parsers. |
| 406 | */ |
| 407 | |
| 408 | status = pjsip_register_hdr_parser( "Accept", NULL, &parse_hdr_accept); |
| 409 | PJ_ASSERT_RETURN(status == PJ_SUCCESS, status); |
| 410 | |
| 411 | status = pjsip_register_hdr_parser( "Allow", NULL, &parse_hdr_allow); |
| 412 | PJ_ASSERT_RETURN(status == PJ_SUCCESS, status); |
| 413 | |
| 414 | status = pjsip_register_hdr_parser( "Call-ID", "i", &parse_hdr_call_id); |
| 415 | PJ_ASSERT_RETURN(status == PJ_SUCCESS, status); |
| 416 | |
| 417 | status = pjsip_register_hdr_parser( "Contact", "m", &parse_hdr_contact); |
| 418 | PJ_ASSERT_RETURN(status == PJ_SUCCESS, status); |
| 419 | |
| 420 | status = pjsip_register_hdr_parser( "Content-Length", "l", |
| 421 | &parse_hdr_content_len); |
| 422 | PJ_ASSERT_RETURN(status == PJ_SUCCESS, status); |
| 423 | |
| 424 | status = pjsip_register_hdr_parser( "Content-Type", "c", |
| 425 | &parse_hdr_content_type); |
| 426 | PJ_ASSERT_RETURN(status == PJ_SUCCESS, status); |
| 427 | |
| 428 | status = pjsip_register_hdr_parser( "CSeq", NULL, &parse_hdr_cseq); |
| 429 | PJ_ASSERT_RETURN(status == PJ_SUCCESS, status); |
| 430 | |
| 431 | status = pjsip_register_hdr_parser( "Expires", NULL, &parse_hdr_expires); |
| 432 | PJ_ASSERT_RETURN(status == PJ_SUCCESS, status); |
| 433 | |
| 434 | status = pjsip_register_hdr_parser( "From", "f", &parse_hdr_from); |
| 435 | PJ_ASSERT_RETURN(status == PJ_SUCCESS, status); |
| 436 | |
| 437 | status = pjsip_register_hdr_parser( "Max-Forwards", NULL, |
| 438 | &parse_hdr_max_forwards); |
| 439 | PJ_ASSERT_RETURN(status == PJ_SUCCESS, status); |
| 440 | |
| 441 | status = pjsip_register_hdr_parser( "Min-Expires", NULL, |
| 442 | &parse_hdr_min_expires); |
| 443 | PJ_ASSERT_RETURN(status == PJ_SUCCESS, status); |
| 444 | |
| 445 | status = pjsip_register_hdr_parser( "Record-Route", NULL, &parse_hdr_rr); |
| 446 | PJ_ASSERT_RETURN(status == PJ_SUCCESS, status); |
| 447 | |
| 448 | status = pjsip_register_hdr_parser( "Route", NULL, &parse_hdr_route); |
| 449 | PJ_ASSERT_RETURN(status == PJ_SUCCESS, status); |
| 450 | |
| 451 | status = pjsip_register_hdr_parser( "Require", NULL, &parse_hdr_require); |
| 452 | PJ_ASSERT_RETURN(status == PJ_SUCCESS, status); |
| 453 | |
| 454 | status = pjsip_register_hdr_parser( "Retry-After", NULL, |
| 455 | &parse_hdr_retry_after); |
| 456 | PJ_ASSERT_RETURN(status == PJ_SUCCESS, status); |
| 457 | |
| 458 | status = pjsip_register_hdr_parser( "Supported", "k", |
| 459 | &parse_hdr_supported); |
| 460 | PJ_ASSERT_RETURN(status == PJ_SUCCESS, status); |
| 461 | |
| 462 | status = pjsip_register_hdr_parser( "To", "t", &parse_hdr_to); |
| 463 | PJ_ASSERT_RETURN(status == PJ_SUCCESS, status); |
| 464 | |
| 465 | status = pjsip_register_hdr_parser( "Unsupported", NULL, |
| 466 | &parse_hdr_unsupported); |
| 467 | PJ_ASSERT_RETURN(status == PJ_SUCCESS, status); |
| 468 | |
| 469 | status = pjsip_register_hdr_parser( "Via", "v", &parse_hdr_via); |
| 470 | PJ_ASSERT_RETURN(status == PJ_SUCCESS, status); |
| 471 | |
| 472 | /* |
| 473 | * Register auth parser. |
| 474 | */ |
| 475 | |
| 476 | status = pjsip_auth_init_parser(); |
| 477 | |
| 478 | return status; |
| 479 | } |
| 480 | |
| 481 | void init_sip_parser(void) |
| 482 | { |
| 483 | pj_enter_critical_section(); |
| 484 | if (++parser_is_initialized == 1) { |
| 485 | init_parser(); |
| 486 | } |
| 487 | pj_leave_critical_section(); |
| 488 | } |
| 489 | |
| 490 | void deinit_sip_parser(void) |
| 491 | { |
| 492 | pj_enter_critical_section(); |
| 493 | if (--parser_is_initialized == 0) { |
| 494 | /* Clear header handlers */ |
| 495 | pj_bzero(handler, sizeof(handler)); |
| 496 | handler_count = 0; |
| 497 | |
| 498 | /* Clear URI handlers */ |
| 499 | pj_bzero(uri_handler, sizeof(uri_handler)); |
| 500 | uri_handler_count = 0; |
| 501 | |
| 502 | /* Deregister exception ID */ |
| 503 | pj_exception_id_free(PJSIP_SYN_ERR_EXCEPTION); |
| 504 | PJSIP_SYN_ERR_EXCEPTION = -1; |
| 505 | } |
| 506 | pj_leave_critical_section(); |
| 507 | } |
| 508 | |
| 509 | /* Compare the handler record with header name, and return: |
| 510 | * - 0 if handler match. |
| 511 | * - <0 if handler is 'less' than the header name. |
| 512 | * - >0 if handler is 'greater' than header name. |
| 513 | */ |
| 514 | PJ_INLINE(int) compare_handler( const handler_rec *r1, |
| 515 | const char *name, |
| 516 | pj_size_t name_len, |
| 517 | pj_uint32_t hash ) |
| 518 | { |
| 519 | PJ_UNUSED_ARG(name_len); |
| 520 | |
| 521 | /* Compare hashed value. */ |
| 522 | if (r1->hname_hash < hash) |
| 523 | return -1; |
| 524 | if (r1->hname_hash > hash) |
| 525 | return 1; |
| 526 | |
| 527 | /* Compare length. */ |
| 528 | /* |
| 529 | if (r1->hname_len < name_len) |
| 530 | return -1; |
| 531 | if (r1->hname_len > name_len) |
| 532 | return 1; |
| 533 | */ |
| 534 | |
| 535 | /* Equal length and equal hash. compare the strings. */ |
| 536 | return pj_memcmp(r1->hname, name, name_len); |
| 537 | } |
| 538 | |
| 539 | /* Register one handler for one header name. */ |
| 540 | static pj_status_t int_register_parser( const char *name, |
| 541 | pjsip_parse_hdr_func *fptr ) |
| 542 | { |
| 543 | unsigned pos; |
| 544 | handler_rec rec; |
| 545 | |
| 546 | if (handler_count >= PJ_ARRAY_SIZE(handler)) { |
| 547 | pj_assert(!"Too many handlers!"); |
| 548 | return PJ_ETOOMANY; |
| 549 | } |
| 550 | |
| 551 | /* Initialize temporary handler. */ |
| 552 | rec.handler = fptr; |
| 553 | rec.hname_len = strlen(name); |
| 554 | if (rec.hname_len >= sizeof(rec.hname)) { |
| 555 | pj_assert(!"Header name is too long!"); |
| 556 | return PJ_ENAMETOOLONG; |
| 557 | } |
| 558 | /* Copy name. */ |
| 559 | pj_memcpy(rec.hname, name, rec.hname_len); |
| 560 | rec.hname[rec.hname_len] = '\0'; |
| 561 | |
| 562 | /* Calculate hash value. */ |
| 563 | rec.hname_hash = pj_hash_calc(0, rec.hname, (unsigned)rec.hname_len); |
| 564 | |
| 565 | /* Get the pos to insert the new handler. */ |
| 566 | for (pos=0; pos < handler_count; ++pos) { |
| 567 | int d; |
| 568 | d = compare_handler(&handler[pos], rec.hname, rec.hname_len, |
| 569 | rec.hname_hash); |
| 570 | if (d == 0) { |
| 571 | pj_assert(0); |
| 572 | return PJ_EEXISTS; |
| 573 | } |
| 574 | if (d > 0) { |
| 575 | break; |
| 576 | } |
| 577 | } |
| 578 | |
| 579 | /* Shift handlers. */ |
| 580 | if (pos != handler_count) { |
| 581 | pj_memmove( &handler[pos+1], &handler[pos], |
| 582 | (handler_count-pos)*sizeof(handler_rec)); |
| 583 | } |
| 584 | /* Add new handler. */ |
| 585 | pj_memcpy( &handler[pos], &rec, sizeof(handler_rec)); |
| 586 | ++handler_count; |
| 587 | |
| 588 | return PJ_SUCCESS; |
| 589 | } |
| 590 | |
| 591 | /* Register parser handler. If both header name and short name are valid, |
| 592 | * then two instances of handler will be registered. |
| 593 | */ |
| 594 | PJ_DEF(pj_status_t) pjsip_register_hdr_parser( const char *hname, |
| 595 | const char *hshortname, |
| 596 | pjsip_parse_hdr_func *fptr) |
| 597 | { |
| 598 | unsigned i; |
| 599 | pj_size_t len; |
| 600 | char hname_lcase[PJSIP_MAX_HNAME_LEN+1]; |
| 601 | pj_status_t status; |
| 602 | |
| 603 | /* Check that name is not too long */ |
| 604 | len = pj_ansi_strlen(hname); |
| 605 | if (len > PJSIP_MAX_HNAME_LEN) { |
| 606 | pj_assert(!"Header name is too long!"); |
| 607 | return PJ_ENAMETOOLONG; |
| 608 | } |
| 609 | |
| 610 | /* Register the normal Mixed-Case name */ |
| 611 | status = int_register_parser(hname, fptr); |
| 612 | if (status != PJ_SUCCESS) { |
| 613 | return status; |
| 614 | } |
| 615 | |
| 616 | /* Get the lower-case name */ |
| 617 | for (i=0; i<len; ++i) { |
| 618 | hname_lcase[i] = (char)pj_tolower(hname[i]); |
| 619 | } |
| 620 | hname_lcase[len] = '\0'; |
| 621 | |
| 622 | /* Register the lower-case version of the name */ |
| 623 | status = int_register_parser(hname_lcase, fptr); |
| 624 | if (status != PJ_SUCCESS) { |
| 625 | return status; |
| 626 | } |
| 627 | |
| 628 | |
| 629 | /* Register the shortname version of the name */ |
| 630 | if (hshortname) { |
| 631 | status = int_register_parser(hshortname, fptr); |
| 632 | if (status != PJ_SUCCESS) |
| 633 | return status; |
| 634 | } |
| 635 | return PJ_SUCCESS; |
| 636 | } |
| 637 | |
| 638 | |
| 639 | /* Find handler to parse the header name. */ |
| 640 | static pjsip_parse_hdr_func * find_handler_imp(pj_uint32_t hash, |
| 641 | const pj_str_t *hname) |
| 642 | { |
| 643 | handler_rec *first; |
| 644 | int comp; |
| 645 | unsigned n; |
| 646 | |
| 647 | /* Binary search for the handler. */ |
| 648 | comp = -1; |
| 649 | first = &handler[0]; |
| 650 | n = handler_count; |
| 651 | for (; n > 0; ) { |
| 652 | unsigned half = n / 2; |
| 653 | handler_rec *mid = first + half; |
| 654 | |
| 655 | comp = compare_handler(mid, hname->ptr, hname->slen, hash); |
| 656 | if (comp < 0) { |
| 657 | first = ++mid; |
| 658 | n -= half + 1; |
| 659 | } else if (comp==0) { |
| 660 | first = mid; |
| 661 | break; |
| 662 | } else { |
| 663 | n = half; |
| 664 | } |
| 665 | } |
| 666 | |
| 667 | return comp==0 ? first->handler : NULL; |
| 668 | } |
| 669 | |
| 670 | |
| 671 | /* Find handler to parse the header name. */ |
| 672 | static pjsip_parse_hdr_func* find_handler(const pj_str_t *hname) |
| 673 | { |
| 674 | pj_uint32_t hash; |
| 675 | char hname_copy[PJSIP_MAX_HNAME_LEN]; |
| 676 | pj_str_t tmp; |
| 677 | pjsip_parse_hdr_func *handler; |
| 678 | |
| 679 | if (hname->slen >= PJSIP_MAX_HNAME_LEN) { |
| 680 | /* Guaranteed not to be able to find handler. */ |
| 681 | return NULL; |
| 682 | } |
| 683 | |
| 684 | /* First, common case, try to find handler with exact name */ |
| 685 | hash = pj_hash_calc(0, hname->ptr, (unsigned)hname->slen); |
| 686 | handler = find_handler_imp(hash, hname); |
| 687 | if (handler) |
| 688 | return handler; |
| 689 | |
| 690 | |
| 691 | /* If not found, try converting the header name to lowercase and |
| 692 | * search again. |
| 693 | */ |
| 694 | hash = pj_hash_calc_tolower(0, hname_copy, hname); |
| 695 | tmp.ptr = hname_copy; |
| 696 | tmp.slen = hname->slen; |
| 697 | return find_handler_imp(hash, &tmp); |
| 698 | } |
| 699 | |
| 700 | |
| 701 | /* Find URI handler. */ |
| 702 | static pjsip_parse_uri_func* find_uri_handler(const pj_str_t *scheme) |
| 703 | { |
| 704 | unsigned i; |
| 705 | for (i=0; i<uri_handler_count; ++i) { |
| 706 | if (parser_stricmp(uri_handler[i].scheme, (*scheme))==0) |
| 707 | return uri_handler[i].parse; |
| 708 | } |
| 709 | return &int_parse_other_uri; |
| 710 | } |
| 711 | |
| 712 | /* Register URI parser. */ |
| 713 | PJ_DEF(pj_status_t) pjsip_register_uri_parser( char *scheme, |
| 714 | pjsip_parse_uri_func *func) |
| 715 | { |
| 716 | if (uri_handler_count >= PJ_ARRAY_SIZE(uri_handler)) |
| 717 | return PJ_ETOOMANY; |
| 718 | |
| 719 | uri_handler[uri_handler_count].scheme = pj_str((char*)scheme); |
| 720 | uri_handler[uri_handler_count].parse = func; |
| 721 | ++uri_handler_count; |
| 722 | |
| 723 | return PJ_SUCCESS; |
| 724 | } |
| 725 | |
| 726 | /* Public function to parse SIP message. */ |
| 727 | PJ_DEF(pjsip_msg*) pjsip_parse_msg( pj_pool_t *pool, |
| 728 | char *buf, pj_size_t size, |
| 729 | pjsip_parser_err_report *err_list) |
| 730 | { |
| 731 | pjsip_msg *msg = NULL; |
| 732 | pj_scanner scanner; |
| 733 | pjsip_parse_ctx context; |
| 734 | |
| 735 | pj_scan_init(&scanner, buf, size, PJ_SCAN_AUTOSKIP_WS_HEADER, |
| 736 | &on_syntax_error); |
| 737 | |
| 738 | context.scanner = &scanner; |
| 739 | context.pool = pool; |
| 740 | context.rdata = NULL; |
| 741 | |
| 742 | msg = int_parse_msg(&context, err_list); |
| 743 | |
| 744 | pj_scan_fini(&scanner); |
| 745 | return msg; |
| 746 | } |
| 747 | |
| 748 | /* Public function to parse as rdata.*/ |
| 749 | PJ_DEF(pjsip_msg *) pjsip_parse_rdata( char *buf, pj_size_t size, |
| 750 | pjsip_rx_data *rdata ) |
| 751 | { |
| 752 | pj_scanner scanner; |
| 753 | pjsip_parse_ctx context; |
| 754 | |
| 755 | pj_scan_init(&scanner, buf, size, PJ_SCAN_AUTOSKIP_WS_HEADER, |
| 756 | &on_syntax_error); |
| 757 | |
| 758 | context.scanner = &scanner; |
| 759 | context.pool = rdata->tp_info.pool; |
| 760 | context.rdata = rdata; |
| 761 | |
| 762 | rdata->msg_info.msg = int_parse_msg(&context, &rdata->msg_info.parse_err); |
| 763 | |
| 764 | pj_scan_fini(&scanner); |
| 765 | return rdata->msg_info.msg; |
| 766 | } |
| 767 | |
| 768 | /* Determine if a message has been received. */ |
| 769 | PJ_DEF(pj_bool_t) pjsip_find_msg( const char *buf, pj_size_t size, |
| 770 | pj_bool_t is_datagram, pj_size_t *msg_size) |
| 771 | { |
| 772 | #if PJ_HAS_TCP |
| 773 | const char *hdr_end; |
| 774 | const char *body_start; |
| 775 | const char *pos; |
| 776 | const char *line; |
| 777 | int content_length = -1; |
| 778 | pj_str_t cur_msg; |
| 779 | const pj_str_t end_hdr = { "\n\r\n", 3}; |
| 780 | |
| 781 | *msg_size = size; |
| 782 | |
| 783 | /* For datagram, the whole datagram IS the message. */ |
| 784 | if (is_datagram) { |
| 785 | return PJ_SUCCESS; |
| 786 | } |
| 787 | |
| 788 | |
| 789 | /* Find the end of header area by finding an empty line. |
| 790 | * Don't use plain strstr() since we want to be able to handle |
| 791 | * NULL character in the message |
| 792 | */ |
| 793 | cur_msg.ptr = (char*)buf; cur_msg.slen = size; |
| 794 | pos = pj_strstr(&cur_msg, &end_hdr); |
| 795 | if (pos == NULL) { |
| 796 | return PJSIP_EPARTIALMSG; |
| 797 | } |
| 798 | |
| 799 | hdr_end = pos+1; |
| 800 | body_start = pos+3; |
| 801 | |
| 802 | /* Find "Content-Length" header the hard way. */ |
| 803 | line = pj_strchr(&cur_msg, '\n'); |
| 804 | while (line && line < hdr_end) { |
| 805 | ++line; |
| 806 | if ( ((*line=='C' || *line=='c') && |
| 807 | strnicmp_alnum(line, "Content-Length", 14) == 0) || |
| 808 | ((*line=='l' || *line=='L') && |
| 809 | (*(line+1)==' ' || *(line+1)=='\t' || *(line+1)==':'))) |
| 810 | { |
| 811 | /* Try to parse the header. */ |
| 812 | pj_scanner scanner; |
| 813 | PJ_USE_EXCEPTION; |
| 814 | |
| 815 | pj_scan_init(&scanner, (char*)line, hdr_end-line, |
| 816 | PJ_SCAN_AUTOSKIP_WS_HEADER, &on_syntax_error); |
| 817 | |
| 818 | PJ_TRY { |
| 819 | pj_str_t str_clen; |
| 820 | |
| 821 | /* Get "Content-Length" or "L" name */ |
| 822 | if (*line=='C' || *line=='c') |
| 823 | pj_scan_advance_n(&scanner, 14, PJ_TRUE); |
| 824 | else if (*line=='l' || *line=='L') |
| 825 | pj_scan_advance_n(&scanner, 1, PJ_TRUE); |
| 826 | |
| 827 | /* Get colon */ |
| 828 | if (pj_scan_get_char(&scanner) != ':') { |
| 829 | PJ_THROW(PJSIP_SYN_ERR_EXCEPTION); |
| 830 | } |
| 831 | |
| 832 | /* Get number */ |
| 833 | pj_scan_get(&scanner, &pconst.pjsip_DIGIT_SPEC, &str_clen); |
| 834 | |
| 835 | /* Get newline. */ |
| 836 | pj_scan_get_newline(&scanner); |
| 837 | |
| 838 | /* Found a valid Content-Length header. */ |
| 839 | content_length = pj_strtoul(&str_clen); |
| 840 | } |
| 841 | PJ_CATCH_ANY { |
| 842 | content_length = -1; |
| 843 | } |
| 844 | PJ_END |
| 845 | |
| 846 | pj_scan_fini(&scanner); |
| 847 | } |
| 848 | |
| 849 | /* Found valid Content-Length? */ |
| 850 | if (content_length != -1) |
| 851 | break; |
| 852 | |
| 853 | /* Go to next line. */ |
| 854 | cur_msg.slen -= (line - cur_msg.ptr); |
| 855 | cur_msg.ptr = (char*)line; |
| 856 | line = pj_strchr(&cur_msg, '\n'); |
| 857 | } |
| 858 | |
| 859 | /* Found Content-Length? */ |
| 860 | if (content_length == -1) { |
| 861 | return PJSIP_EMISSINGHDR; |
| 862 | } |
| 863 | |
| 864 | /* Enough packet received? */ |
| 865 | *msg_size = (body_start - buf) + content_length; |
| 866 | return (*msg_size) <= size ? PJ_SUCCESS : PJSIP_EPARTIALMSG; |
| 867 | #else |
| 868 | PJ_UNUSED_ARG(buf); |
| 869 | PJ_UNUSED_ARG(is_datagram); |
| 870 | *msg_size = size; |
| 871 | return PJ_SUCCESS; |
| 872 | #endif |
| 873 | } |
| 874 | |
| 875 | /* Public function to parse URI */ |
| 876 | PJ_DEF(pjsip_uri*) pjsip_parse_uri( pj_pool_t *pool, |
| 877 | char *buf, pj_size_t size, |
| 878 | unsigned option) |
| 879 | { |
| 880 | pj_scanner scanner; |
| 881 | pjsip_uri *uri = NULL; |
| 882 | PJ_USE_EXCEPTION; |
| 883 | |
| 884 | pj_scan_init(&scanner, buf, size, 0, &on_syntax_error); |
| 885 | |
| 886 | |
| 887 | PJ_TRY { |
| 888 | uri = int_parse_uri_or_name_addr(&scanner, pool, option); |
| 889 | } |
| 890 | PJ_CATCH_ANY { |
| 891 | uri = NULL; |
| 892 | } |
| 893 | PJ_END; |
| 894 | |
| 895 | /* Must have exhausted all inputs. */ |
| 896 | if (pj_scan_is_eof(&scanner) || IS_NEWLINE(*scanner.curptr)) { |
| 897 | /* Success. */ |
| 898 | pj_scan_fini(&scanner); |
| 899 | return uri; |
| 900 | } |
| 901 | |
| 902 | /* Still have some characters unparsed. */ |
| 903 | pj_scan_fini(&scanner); |
| 904 | return NULL; |
| 905 | } |
| 906 | |
| 907 | /* SIP version */ |
| 908 | static void parse_sip_version(pj_scanner *scanner) |
| 909 | { |
| 910 | pj_str_t SIP = { "SIP", 3 }; |
| 911 | pj_str_t V2 = { "2.0", 3 }; |
| 912 | pj_str_t sip, version; |
| 913 | |
| 914 | pj_scan_get( scanner, &pconst.pjsip_ALPHA_SPEC, &sip); |
| 915 | if (pj_scan_get_char(scanner) != '/') |
| 916 | on_syntax_error(scanner); |
| 917 | pj_scan_get_n( scanner, 3, &version); |
| 918 | if (pj_stricmp(&sip, &SIP) || pj_stricmp(&version, &V2)) |
| 919 | on_syntax_error(scanner); |
| 920 | } |
| 921 | |
| 922 | static pj_bool_t is_next_sip_version(pj_scanner *scanner) |
| 923 | { |
| 924 | pj_str_t SIP = { "SIP", 3 }; |
| 925 | pj_str_t sip; |
| 926 | int c; |
| 927 | |
| 928 | c = pj_scan_peek(scanner, &pconst.pjsip_ALPHA_SPEC, &sip); |
| 929 | /* return TRUE if it is "SIP" followed by "/" or space. |
| 930 | * we include space since the "/" may be separated by space, |
| 931 | * although this would mean it would return TRUE if it is a |
| 932 | * request and the method is "SIP"! |
| 933 | */ |
| 934 | return c && (c=='/' || c==' ' || c=='\t') && pj_stricmp(&sip, &SIP)==0; |
| 935 | } |
| 936 | |
| 937 | /* Internal function to parse SIP message */ |
| 938 | static pjsip_msg *int_parse_msg( pjsip_parse_ctx *ctx, |
| 939 | pjsip_parser_err_report *err_list) |
| 940 | { |
| 941 | pj_bool_t parsing_headers; |
| 942 | pjsip_msg *msg = NULL; |
| 943 | pj_str_t hname; |
| 944 | pjsip_ctype_hdr *ctype_hdr = NULL; |
| 945 | pj_scanner *scanner = ctx->scanner; |
| 946 | pj_pool_t *pool = ctx->pool; |
| 947 | PJ_USE_EXCEPTION; |
| 948 | |
| 949 | parsing_headers = PJ_FALSE; |
| 950 | |
| 951 | retry_parse: |
| 952 | PJ_TRY |
| 953 | { |
| 954 | if (parsing_headers) |
| 955 | goto parse_headers; |
| 956 | |
| 957 | /* Skip leading newlines. */ |
| 958 | while (IS_NEWLINE(*scanner->curptr)) { |
| 959 | pj_scan_get_newline(scanner); |
| 960 | } |
| 961 | |
| 962 | /* Check if we still have valid packet. |
| 963 | * Sometimes endpoints just send blank (CRLF) packets just to keep |
| 964 | * NAT bindings open. |
| 965 | */ |
| 966 | if (pj_scan_is_eof(scanner)) |
| 967 | return NULL; |
| 968 | |
| 969 | /* Parse request or status line */ |
| 970 | if (is_next_sip_version(scanner)) { |
| 971 | msg = pjsip_msg_create(pool, PJSIP_RESPONSE_MSG); |
| 972 | int_parse_status_line( scanner, &msg->line.status ); |
| 973 | } else { |
| 974 | msg = pjsip_msg_create(pool, PJSIP_REQUEST_MSG); |
| 975 | int_parse_req_line(scanner, pool, &msg->line.req ); |
| 976 | } |
| 977 | |
| 978 | parsing_headers = PJ_TRUE; |
| 979 | |
| 980 | parse_headers: |
| 981 | /* Parse headers. */ |
| 982 | do { |
| 983 | pjsip_parse_hdr_func * handler; |
| 984 | pjsip_hdr *hdr = NULL; |
| 985 | |
| 986 | /* Init hname just in case parsing fails. |
| 987 | * Ref: PROTOS #2412 |
| 988 | */ |
| 989 | hname.slen = 0; |
| 990 | |
| 991 | /* Get hname. */ |
| 992 | pj_scan_get( scanner, &pconst.pjsip_TOKEN_SPEC, &hname); |
| 993 | if (pj_scan_get_char( scanner ) != ':') { |
| 994 | PJ_THROW(PJSIP_SYN_ERR_EXCEPTION); |
| 995 | } |
| 996 | |
| 997 | /* Find handler. */ |
| 998 | handler = find_handler(&hname); |
| 999 | |
| 1000 | /* Call the handler if found. |
| 1001 | * If no handler is found, then treat the header as generic |
| 1002 | * hname/hvalue pair. |
| 1003 | */ |
| 1004 | if (handler) { |
| 1005 | hdr = (*handler)(ctx); |
| 1006 | |
| 1007 | /* Note: |
| 1008 | * hdr MAY BE NULL, if parsing does not yield a new header |
| 1009 | * instance, e.g. the values have been added to existing |
| 1010 | * header. See http://trac.pjsip.org/repos/ticket/940 |
| 1011 | */ |
| 1012 | |
| 1013 | /* Check if we've just parsed a Content-Type header. |
| 1014 | * We will check for a message body if we've got Content-Type |
| 1015 | * header. |
| 1016 | */ |
| 1017 | if (hdr && hdr->type == PJSIP_H_CONTENT_TYPE) { |
| 1018 | ctype_hdr = (pjsip_ctype_hdr*)hdr; |
| 1019 | } |
| 1020 | |
| 1021 | } else { |
| 1022 | hdr = parse_hdr_generic_string(ctx); |
| 1023 | hdr->name = hdr->sname = hname; |
| 1024 | } |
| 1025 | |
| 1026 | |
| 1027 | /* Single parse of header line can produce multiple headers. |
| 1028 | * For example, if one Contact: header contains Contact list |
| 1029 | * separated by comma, then these Contacts will be split into |
| 1030 | * different Contact headers. |
| 1031 | * So here we must insert list instead of just insert one header. |
| 1032 | */ |
| 1033 | if (hdr) |
| 1034 | pj_list_insert_nodes_before(&msg->hdr, hdr); |
| 1035 | |
| 1036 | /* Parse until EOF or an empty line is found. */ |
| 1037 | } while (!pj_scan_is_eof(scanner) && !IS_NEWLINE(*scanner->curptr)); |
| 1038 | |
| 1039 | parsing_headers = PJ_FALSE; |
| 1040 | |
| 1041 | /* If empty line is found, eat it. */ |
| 1042 | if (!pj_scan_is_eof(scanner)) { |
| 1043 | if (IS_NEWLINE(*scanner->curptr)) { |
| 1044 | pj_scan_get_newline(scanner); |
| 1045 | } |
| 1046 | } |
| 1047 | |
| 1048 | /* If we have Content-Type header, treat the rest of the message |
| 1049 | * as body. |
| 1050 | */ |
| 1051 | if (ctype_hdr && scanner->curptr!=scanner->end) { |
| 1052 | /* New: if Content-Type indicates that this is a multipart |
| 1053 | * message body, parse it. |
| 1054 | */ |
| 1055 | const pj_str_t STR_MULTIPART = { "multipart", 9 }; |
| 1056 | pjsip_msg_body *body; |
| 1057 | |
| 1058 | if (pj_stricmp(&ctype_hdr->media.type, &STR_MULTIPART)==0) { |
| 1059 | body = pjsip_multipart_parse(pool, scanner->curptr, |
| 1060 | scanner->end - scanner->curptr, |
| 1061 | &ctype_hdr->media, 0); |
| 1062 | } else { |
| 1063 | body = PJ_POOL_ALLOC_T(pool, pjsip_msg_body); |
| 1064 | pjsip_media_type_cp(pool, &body->content_type, |
| 1065 | &ctype_hdr->media); |
| 1066 | |
| 1067 | body->data = scanner->curptr; |
| 1068 | body->len = (unsigned)(scanner->end - scanner->curptr); |
| 1069 | body->print_body = &pjsip_print_text_body; |
| 1070 | body->clone_data = &pjsip_clone_text_data; |
| 1071 | } |
| 1072 | |
| 1073 | msg->body = body; |
| 1074 | } |
| 1075 | } |
| 1076 | PJ_CATCH_ANY |
| 1077 | { |
| 1078 | /* Exception was thrown during parsing. |
| 1079 | * Skip until newline, and parse next header. |
| 1080 | */ |
| 1081 | if (err_list) { |
| 1082 | pjsip_parser_err_report *err_info; |
| 1083 | |
| 1084 | err_info = PJ_POOL_ALLOC_T(pool, pjsip_parser_err_report); |
| 1085 | err_info->except_code = PJ_GET_EXCEPTION(); |
| 1086 | err_info->line = scanner->line; |
| 1087 | /* Scanner's column is zero based, so add 1 */ |
| 1088 | err_info->col = pj_scan_get_col(scanner) + 1; |
| 1089 | if (parsing_headers) |
| 1090 | err_info->hname = hname; |
| 1091 | else if (msg && msg->type == PJSIP_REQUEST_MSG) |
| 1092 | err_info->hname = pj_str("Request Line"); |
| 1093 | else if (msg && msg->type == PJSIP_RESPONSE_MSG) |
| 1094 | err_info->hname = pj_str("Status Line"); |
| 1095 | else |
| 1096 | err_info->hname.slen = 0; |
| 1097 | |
| 1098 | pj_list_insert_before(err_list, err_info); |
| 1099 | } |
| 1100 | |
| 1101 | if (parsing_headers) { |
| 1102 | if (!pj_scan_is_eof(scanner)) { |
| 1103 | /* Skip until next line. |
| 1104 | * Watch for header continuation. |
| 1105 | */ |
| 1106 | do { |
| 1107 | pj_scan_skip_line(scanner); |
| 1108 | } while (IS_SPACE(*scanner->curptr)); |
| 1109 | } |
| 1110 | |
| 1111 | /* Restore flag. Flag may be set in int_parse_sip_url() */ |
| 1112 | scanner->skip_ws = PJ_SCAN_AUTOSKIP_WS_HEADER; |
| 1113 | |
| 1114 | /* Continue parse next header, if any. */ |
| 1115 | if (!pj_scan_is_eof(scanner) && !IS_NEWLINE(*scanner->curptr)) { |
| 1116 | goto retry_parse; |
| 1117 | } |
| 1118 | } |
| 1119 | |
| 1120 | msg = NULL; |
| 1121 | } |
| 1122 | PJ_END; |
| 1123 | |
| 1124 | return msg; |
| 1125 | } |
| 1126 | |
| 1127 | |
| 1128 | /* Parse parameter (pname ["=" pvalue]). */ |
| 1129 | static void parse_param_imp( pj_scanner *scanner, pj_pool_t *pool, |
| 1130 | pj_str_t *pname, pj_str_t *pvalue, |
| 1131 | const pj_cis_t *spec, const pj_cis_t *esc_spec, |
| 1132 | unsigned option) |
| 1133 | { |
| 1134 | /* pname */ |
| 1135 | parser_get_and_unescape(scanner, pool, spec, esc_spec, pname); |
| 1136 | |
| 1137 | /* init pvalue */ |
| 1138 | pvalue->ptr = NULL; |
| 1139 | pvalue->slen = 0; |
| 1140 | |
| 1141 | /* pvalue, if any */ |
| 1142 | if (*scanner->curptr == '=') { |
| 1143 | pj_scan_get_char(scanner); |
| 1144 | if (!pj_scan_is_eof(scanner)) { |
| 1145 | /* pvalue can be a quoted string. */ |
| 1146 | if (*scanner->curptr == '"') { |
| 1147 | pj_scan_get_quote( scanner, '"', '"', pvalue); |
| 1148 | if (option & PJSIP_PARSE_REMOVE_QUOTE) { |
| 1149 | pvalue->ptr++; |
| 1150 | pvalue->slen -= 2; |
| 1151 | } |
| 1152 | } else if (*scanner->curptr == '[') { |
| 1153 | /* pvalue can be a quoted IPv6; in this case, the |
| 1154 | * '[' and ']' quote characters are to be removed |
| 1155 | * from the pvalue. |
| 1156 | */ |
| 1157 | pj_scan_get_char(scanner); |
| 1158 | pj_scan_get_until_ch(scanner, ']', pvalue); |
| 1159 | pj_scan_get_char(scanner); |
| 1160 | } else if(pj_cis_match(spec, *scanner->curptr)) { |
| 1161 | parser_get_and_unescape(scanner, pool, spec, esc_spec, pvalue); |
| 1162 | } |
| 1163 | } |
| 1164 | } |
| 1165 | } |
| 1166 | |
| 1167 | /* Parse parameter (pname ["=" pvalue]) using token. */ |
| 1168 | PJ_DEF(void) pjsip_parse_param_imp(pj_scanner *scanner, pj_pool_t *pool, |
| 1169 | pj_str_t *pname, pj_str_t *pvalue, |
| 1170 | unsigned option) |
| 1171 | { |
| 1172 | parse_param_imp(scanner, pool, pname, pvalue, &pconst.pjsip_TOKEN_SPEC, |
| 1173 | &pconst.pjsip_TOKEN_SPEC_ESC, option); |
| 1174 | } |
| 1175 | |
| 1176 | |
| 1177 | /* Parse parameter (pname ["=" pvalue]) using paramchar. */ |
| 1178 | PJ_DEF(void) pjsip_parse_uri_param_imp( pj_scanner *scanner, pj_pool_t *pool, |
| 1179 | pj_str_t *pname, pj_str_t *pvalue, |
| 1180 | unsigned option) |
| 1181 | { |
| 1182 | parse_param_imp(scanner,pool, pname, pvalue, &pconst.pjsip_PARAM_CHAR_SPEC, |
| 1183 | &pconst.pjsip_PARAM_CHAR_SPEC_ESC, option); |
| 1184 | } |
| 1185 | |
| 1186 | |
| 1187 | /* Parse parameter (";" pname ["=" pvalue]) in SIP header. */ |
| 1188 | static void int_parse_param( pj_scanner *scanner, pj_pool_t *pool, |
| 1189 | pj_str_t *pname, pj_str_t *pvalue, |
| 1190 | unsigned option) |
| 1191 | { |
| 1192 | /* Get ';' character */ |
| 1193 | pj_scan_get_char(scanner); |
| 1194 | |
| 1195 | /* Get pname and optionally pvalue */ |
| 1196 | pjsip_parse_param_imp(scanner, pool, pname, pvalue, option); |
| 1197 | } |
| 1198 | |
| 1199 | /* Parse parameter (";" pname ["=" pvalue]) in URI. */ |
| 1200 | static void int_parse_uri_param( pj_scanner *scanner, pj_pool_t *pool, |
| 1201 | pj_str_t *pname, pj_str_t *pvalue, |
| 1202 | unsigned option) |
| 1203 | { |
| 1204 | /* Get ';' character */ |
| 1205 | pj_scan_get_char(scanner); |
| 1206 | |
| 1207 | /* Get pname and optionally pvalue */ |
| 1208 | pjsip_parse_uri_param_imp(scanner, pool, pname, pvalue, |
| 1209 | option); |
| 1210 | } |
| 1211 | |
| 1212 | |
| 1213 | /* Parse header parameter. */ |
| 1214 | static void int_parse_hparam( pj_scanner *scanner, pj_pool_t *pool, |
| 1215 | pj_str_t *hname, pj_str_t *hvalue ) |
| 1216 | { |
| 1217 | /* Get '?' or '&' character. */ |
| 1218 | pj_scan_get_char(scanner); |
| 1219 | |
| 1220 | /* hname */ |
| 1221 | parser_get_and_unescape(scanner, pool, &pconst.pjsip_HDR_CHAR_SPEC, |
| 1222 | &pconst.pjsip_HDR_CHAR_SPEC_ESC, hname); |
| 1223 | |
| 1224 | /* Init hvalue */ |
| 1225 | hvalue->ptr = NULL; |
| 1226 | hvalue->slen = 0; |
| 1227 | |
| 1228 | /* pvalue, if any */ |
| 1229 | if (*scanner->curptr == '=') { |
| 1230 | pj_scan_get_char(scanner); |
| 1231 | if (!pj_scan_is_eof(scanner) && |
| 1232 | pj_cis_match(&pconst.pjsip_HDR_CHAR_SPEC, *scanner->curptr)) |
| 1233 | { |
| 1234 | parser_get_and_unescape(scanner, pool, &pconst.pjsip_HDR_CHAR_SPEC, |
| 1235 | &pconst.pjsip_HDR_CHAR_SPEC_ESC, hvalue); |
| 1236 | } |
| 1237 | } |
| 1238 | } |
| 1239 | |
| 1240 | /* Parse host part: |
| 1241 | * host = hostname / IPv4address / IPv6reference |
| 1242 | */ |
| 1243 | static void int_parse_host(pj_scanner *scanner, pj_str_t *host) |
| 1244 | { |
| 1245 | if (*scanner->curptr == '[') { |
| 1246 | /* Note: the '[' and ']' characters are removed from the host */ |
| 1247 | pj_scan_get_char(scanner); |
| 1248 | pj_scan_get_until_ch(scanner, ']', host); |
| 1249 | pj_scan_get_char(scanner); |
| 1250 | } else { |
| 1251 | pj_scan_get( scanner, &pconst.pjsip_HOST_SPEC, host); |
| 1252 | } |
| 1253 | } |
| 1254 | |
| 1255 | /* Parse host:port in URI. */ |
| 1256 | static void int_parse_uri_host_port( pj_scanner *scanner, |
| 1257 | pj_str_t *host, int *p_port) |
| 1258 | { |
| 1259 | int_parse_host(scanner, host); |
| 1260 | |
| 1261 | /* RFC3261 section 19.1.2: host don't need to be unescaped */ |
| 1262 | if (*scanner->curptr == ':') { |
| 1263 | pj_str_t port; |
| 1264 | pj_scan_get_char(scanner); |
| 1265 | pj_scan_get(scanner, &pconst.pjsip_DIGIT_SPEC, &port); |
| 1266 | *p_port = pj_strtoul(&port); |
| 1267 | } else { |
| 1268 | *p_port = 0; |
| 1269 | } |
| 1270 | } |
| 1271 | |
| 1272 | /* Determine if the next token in an URI is a user specification. */ |
| 1273 | static int int_is_next_user(pj_scanner *scanner) |
| 1274 | { |
| 1275 | pj_str_t dummy; |
| 1276 | int is_user; |
| 1277 | |
| 1278 | /* Find character '@'. If this character exist, then the token |
| 1279 | * must be a username. |
| 1280 | */ |
| 1281 | if (pj_scan_peek( scanner, &pconst.pjsip_PROBE_USER_HOST_SPEC, &dummy) == '@') |
| 1282 | is_user = 1; |
| 1283 | else |
| 1284 | is_user = 0; |
| 1285 | |
| 1286 | return is_user; |
| 1287 | } |
| 1288 | |
| 1289 | /* Parse user:pass tokens in an URI. */ |
| 1290 | static void int_parse_user_pass( pj_scanner *scanner, pj_pool_t *pool, |
| 1291 | pj_str_t *user, pj_str_t *pass) |
| 1292 | { |
| 1293 | parser_get_and_unescape(scanner, pool, &pconst.pjsip_USER_SPEC_LENIENT, |
| 1294 | &pconst.pjsip_USER_SPEC_LENIENT_ESC, user); |
| 1295 | |
| 1296 | if ( *scanner->curptr == ':') { |
| 1297 | pj_scan_get_char( scanner ); |
| 1298 | parser_get_and_unescape(scanner, pool, &pconst.pjsip_PASSWD_SPEC, |
| 1299 | &pconst.pjsip_PASSWD_SPEC_ESC, pass); |
| 1300 | } else { |
| 1301 | pass->ptr = NULL; |
| 1302 | pass->slen = 0; |
| 1303 | } |
| 1304 | |
| 1305 | /* Get the '@' */ |
| 1306 | pj_scan_get_char( scanner ); |
| 1307 | } |
| 1308 | |
| 1309 | /* Parse all types of URI. */ |
| 1310 | static pjsip_uri *int_parse_uri_or_name_addr( pj_scanner *scanner, pj_pool_t *pool, |
| 1311 | unsigned opt) |
| 1312 | { |
| 1313 | pjsip_uri *uri; |
| 1314 | int is_name_addr = 0; |
| 1315 | |
| 1316 | /* Exhaust any whitespaces. */ |
| 1317 | pj_scan_skip_whitespace(scanner); |
| 1318 | |
| 1319 | if (*scanner->curptr=='"' || *scanner->curptr=='<') { |
| 1320 | uri = (pjsip_uri*)int_parse_name_addr( scanner, pool ); |
| 1321 | is_name_addr = 1; |
| 1322 | } else { |
| 1323 | pj_str_t scheme; |
| 1324 | int next_ch; |
| 1325 | |
| 1326 | next_ch = pj_scan_peek( scanner, &pconst.pjsip_DISPLAY_SPEC, &scheme); |
| 1327 | |
| 1328 | if (next_ch==':') { |
| 1329 | pjsip_parse_uri_func *func = find_uri_handler(&scheme); |
| 1330 | |
| 1331 | if (func == NULL) { |
| 1332 | /* Unsupported URI scheme */ |
| 1333 | PJ_THROW(PJSIP_SYN_ERR_EXCEPTION); |
| 1334 | } |
| 1335 | |
| 1336 | uri = (pjsip_uri*) |
| 1337 | (*func)(scanner, pool, |
| 1338 | (opt & PJSIP_PARSE_URI_IN_FROM_TO_HDR)==0); |
| 1339 | |
| 1340 | |
| 1341 | } else { |
| 1342 | uri = (pjsip_uri*)int_parse_name_addr( scanner, pool ); |
| 1343 | is_name_addr = 1; |
| 1344 | } |
| 1345 | } |
| 1346 | |
| 1347 | /* Should we return the URI object as name address? */ |
| 1348 | if (opt & PJSIP_PARSE_URI_AS_NAMEADDR) { |
| 1349 | if (is_name_addr == 0) { |
| 1350 | pjsip_name_addr *name_addr; |
| 1351 | |
| 1352 | name_addr = pjsip_name_addr_create(pool); |
| 1353 | name_addr->uri = uri; |
| 1354 | |
| 1355 | uri = (pjsip_uri*)name_addr; |
| 1356 | } |
| 1357 | } |
| 1358 | |
| 1359 | return uri; |
| 1360 | } |
| 1361 | |
| 1362 | /* Parse URI. */ |
| 1363 | static pjsip_uri *int_parse_uri(pj_scanner *scanner, pj_pool_t *pool, |
| 1364 | pj_bool_t parse_params) |
| 1365 | { |
| 1366 | /* Bug: |
| 1367 | * This function should not call back int_parse_name_addr() because |
| 1368 | * it is called by that function. This would cause stack overflow |
| 1369 | * with PROTOS test #1223. |
| 1370 | if (*scanner->curptr=='"' || *scanner->curptr=='<') { |
| 1371 | return (pjsip_uri*)int_parse_name_addr( scanner, pool ); |
| 1372 | } else { |
| 1373 | */ |
| 1374 | pj_str_t scheme; |
| 1375 | int colon; |
| 1376 | pjsip_parse_uri_func *func; |
| 1377 | |
| 1378 | /* Get scheme. */ |
| 1379 | colon = pj_scan_peek(scanner, &pconst.pjsip_TOKEN_SPEC, &scheme); |
| 1380 | if (colon != ':') { |
| 1381 | PJ_THROW(PJSIP_SYN_ERR_EXCEPTION); |
| 1382 | } |
| 1383 | |
| 1384 | func = find_uri_handler(&scheme); |
| 1385 | if (func) { |
| 1386 | return (pjsip_uri*)(*func)(scanner, pool, parse_params); |
| 1387 | |
| 1388 | } else { |
| 1389 | /* Unsupported URI scheme */ |
| 1390 | PJ_THROW(PJSIP_SYN_ERR_EXCEPTION); |
| 1391 | UNREACHED({ return NULL; /* Not reached. */ }) |
| 1392 | } |
| 1393 | |
| 1394 | /* |
| 1395 | } |
| 1396 | */ |
| 1397 | } |
| 1398 | |
| 1399 | /* Parse "sip:" and "sips:" URI. |
| 1400 | * This actually returns (pjsip_sip_uri*) type, |
| 1401 | */ |
| 1402 | static void* int_parse_sip_url( pj_scanner *scanner, |
| 1403 | pj_pool_t *pool, |
| 1404 | pj_bool_t parse_params) |
| 1405 | { |
| 1406 | pj_str_t scheme; |
| 1407 | pjsip_sip_uri *url = NULL; |
| 1408 | int colon; |
| 1409 | int skip_ws = scanner->skip_ws; |
| 1410 | scanner->skip_ws = 0; |
| 1411 | |
| 1412 | pj_scan_get(scanner, &pconst.pjsip_TOKEN_SPEC, &scheme); |
| 1413 | colon = pj_scan_get_char(scanner); |
| 1414 | if (colon != ':') { |
| 1415 | PJ_THROW(PJSIP_SYN_ERR_EXCEPTION); |
| 1416 | } |
| 1417 | |
| 1418 | if (parser_stricmp(scheme, pconst.pjsip_SIP_STR)==0) { |
| 1419 | url = pjsip_sip_uri_create(pool, 0); |
| 1420 | |
| 1421 | } else if (parser_stricmp(scheme, pconst.pjsip_SIPS_STR)==0) { |
| 1422 | url = pjsip_sip_uri_create(pool, 1); |
| 1423 | |
| 1424 | } else { |
| 1425 | PJ_THROW(PJSIP_SYN_ERR_EXCEPTION); |
| 1426 | /* should not reach here */ |
| 1427 | UNREACHED({ |
| 1428 | pj_assert(0); |
| 1429 | return 0; |
| 1430 | }) |
| 1431 | } |
| 1432 | |
| 1433 | if (int_is_next_user(scanner)) { |
| 1434 | int_parse_user_pass(scanner, pool, &url->user, &url->passwd); |
| 1435 | } |
| 1436 | |
| 1437 | /* Get host:port */ |
| 1438 | int_parse_uri_host_port(scanner, &url->host, &url->port); |
| 1439 | |
| 1440 | /* Get URL parameters. */ |
| 1441 | if (parse_params) { |
| 1442 | while (*scanner->curptr == ';' ) { |
| 1443 | pj_str_t pname, pvalue; |
| 1444 | |
| 1445 | int_parse_uri_param( scanner, pool, &pname, &pvalue, 0); |
| 1446 | |
| 1447 | if (!parser_stricmp(pname, pconst.pjsip_USER_STR) && pvalue.slen) { |
| 1448 | url->user_param = pvalue; |
| 1449 | |
| 1450 | } else if (!parser_stricmp(pname, pconst.pjsip_METHOD_STR) && pvalue.slen) { |
| 1451 | url->method_param = pvalue; |
| 1452 | |
| 1453 | } else if (!parser_stricmp(pname, pconst.pjsip_TRANSPORT_STR) && pvalue.slen) { |
| 1454 | url->transport_param = pvalue; |
| 1455 | |
| 1456 | } else if (!parser_stricmp(pname, pconst.pjsip_TTL_STR) && pvalue.slen) { |
| 1457 | url->ttl_param = pj_strtoul(&pvalue); |
| 1458 | |
| 1459 | } else if (!parser_stricmp(pname, pconst.pjsip_MADDR_STR) && pvalue.slen) { |
| 1460 | url->maddr_param = pvalue; |
| 1461 | |
| 1462 | } else if (!parser_stricmp(pname, pconst.pjsip_LR_STR)) { |
| 1463 | url->lr_param = 1; |
| 1464 | |
| 1465 | } else { |
| 1466 | pjsip_param *p = PJ_POOL_ALLOC_T(pool, pjsip_param); |
| 1467 | p->name = pname; |
| 1468 | p->value = pvalue; |
| 1469 | pj_list_insert_before(&url->other_param, p); |
| 1470 | } |
| 1471 | } |
| 1472 | } |
| 1473 | |
| 1474 | /* Get header params. */ |
| 1475 | if (parse_params && *scanner->curptr == '?') { |
| 1476 | do { |
| 1477 | pjsip_param *param; |
| 1478 | param = PJ_POOL_ALLOC_T(pool, pjsip_param); |
| 1479 | int_parse_hparam(scanner, pool, ¶m->name, ¶m->value); |
| 1480 | pj_list_insert_before(&url->header_param, param); |
| 1481 | } while (*scanner->curptr == '&'); |
| 1482 | } |
| 1483 | |
| 1484 | scanner->skip_ws = skip_ws; |
| 1485 | pj_scan_skip_whitespace(scanner); |
| 1486 | return url; |
| 1487 | } |
| 1488 | |
| 1489 | /* Parse nameaddr. */ |
| 1490 | static pjsip_name_addr *int_parse_name_addr( pj_scanner *scanner, |
| 1491 | pj_pool_t *pool ) |
| 1492 | { |
| 1493 | int has_bracket; |
| 1494 | pjsip_name_addr *name_addr; |
| 1495 | |
| 1496 | name_addr = pjsip_name_addr_create(pool); |
| 1497 | |
| 1498 | if (*scanner->curptr == '"') { |
| 1499 | pj_scan_get_quote( scanner, '"', '"', &name_addr->display); |
| 1500 | /* Trim the leading and ending quote */ |
| 1501 | name_addr->display.ptr++; |
| 1502 | name_addr->display.slen -= 2; |
| 1503 | |
| 1504 | } else if (*scanner->curptr != '<') { |
| 1505 | int next; |
| 1506 | pj_str_t dummy; |
| 1507 | |
| 1508 | /* This can be either the start of display name, |
| 1509 | * the start of URL ("sip:", "sips:", "tel:", etc.), or '<' char. |
| 1510 | * We're only interested in display name, because SIP URL |
| 1511 | * will be parser later. |
| 1512 | */ |
| 1513 | next = pj_scan_peek(scanner, &pconst.pjsip_DISPLAY_SPEC, &dummy); |
| 1514 | if (next == '<') { |
| 1515 | /* Ok, this is what we're looking for, a display name. */ |
| 1516 | pj_scan_get_until_ch( scanner, '<', &name_addr->display); |
| 1517 | pj_strtrim(&name_addr->display); |
| 1518 | } |
| 1519 | } |
| 1520 | |
| 1521 | /* Manually skip whitespace. */ |
| 1522 | pj_scan_skip_whitespace(scanner); |
| 1523 | |
| 1524 | /* Get the SIP-URL */ |
| 1525 | has_bracket = (*scanner->curptr == '<'); |
| 1526 | if (has_bracket) { |
| 1527 | pj_scan_get_char(scanner); |
| 1528 | } else if (name_addr->display.slen) { |
| 1529 | /* Must have bracket now (2012-10-26). |
| 1530 | * Allowing (invalid) name-addr to pass URI verification will |
| 1531 | * cause us to send invalid URI to the wire. |
| 1532 | */ |
| 1533 | PJ_THROW( PJSIP_SYN_ERR_EXCEPTION); |
| 1534 | } |
| 1535 | name_addr->uri = int_parse_uri( scanner, pool, PJ_TRUE ); |
| 1536 | if (has_bracket) { |
| 1537 | if (pj_scan_get_char(scanner) != '>') |
| 1538 | PJ_THROW( PJSIP_SYN_ERR_EXCEPTION); |
| 1539 | } |
| 1540 | |
| 1541 | return name_addr; |
| 1542 | } |
| 1543 | |
| 1544 | |
| 1545 | /* Parse other URI */ |
| 1546 | static void* int_parse_other_uri(pj_scanner *scanner, |
| 1547 | pj_pool_t *pool, |
| 1548 | pj_bool_t parse_params) |
| 1549 | { |
| 1550 | pjsip_other_uri *uri = 0; |
| 1551 | const pjsip_parser_const_t *pc = pjsip_parser_const(); |
| 1552 | int skip_ws = scanner->skip_ws; |
| 1553 | |
| 1554 | PJ_UNUSED_ARG(parse_params); |
| 1555 | |
| 1556 | scanner->skip_ws = 0; |
| 1557 | |
| 1558 | uri = pjsip_other_uri_create(pool); |
| 1559 | |
| 1560 | pj_scan_get(scanner, &pc->pjsip_TOKEN_SPEC, &uri->scheme); |
| 1561 | if (pj_scan_get_char(scanner) != ':') { |
| 1562 | PJ_THROW(PJSIP_SYN_ERR_EXCEPTION); |
| 1563 | } |
| 1564 | |
| 1565 | pj_scan_get(scanner, &pc->pjsip_OTHER_URI_CONTENT, &uri->content); |
| 1566 | scanner->skip_ws = skip_ws; |
| 1567 | |
| 1568 | return uri; |
| 1569 | } |
| 1570 | |
| 1571 | |
| 1572 | /* Parse SIP request line. */ |
| 1573 | static void int_parse_req_line( pj_scanner *scanner, pj_pool_t *pool, |
| 1574 | pjsip_request_line *req_line) |
| 1575 | { |
| 1576 | pj_str_t token; |
| 1577 | |
| 1578 | pj_scan_get( scanner, &pconst.pjsip_TOKEN_SPEC, &token); |
| 1579 | pjsip_method_init_np( &req_line->method, &token); |
| 1580 | |
| 1581 | req_line->uri = int_parse_uri(scanner, pool, PJ_TRUE); |
| 1582 | parse_sip_version(scanner); |
| 1583 | pj_scan_get_newline( scanner ); |
| 1584 | } |
| 1585 | |
| 1586 | /* Parse status line. */ |
| 1587 | static void int_parse_status_line( pj_scanner *scanner, |
| 1588 | pjsip_status_line *status_line) |
| 1589 | { |
| 1590 | pj_str_t token; |
| 1591 | |
| 1592 | parse_sip_version(scanner); |
| 1593 | pj_scan_get( scanner, &pconst.pjsip_DIGIT_SPEC, &token); |
| 1594 | status_line->code = pj_strtoul(&token); |
| 1595 | if (*scanner->curptr != '\r' && *scanner->curptr != '\n') |
| 1596 | pj_scan_get( scanner, &pconst.pjsip_NOT_NEWLINE, &status_line->reason); |
| 1597 | else |
| 1598 | status_line->reason.slen=0, status_line->reason.ptr=NULL; |
| 1599 | pj_scan_get_newline( scanner ); |
| 1600 | } |
| 1601 | |
| 1602 | |
| 1603 | /* |
| 1604 | * Public API to parse SIP status line. |
| 1605 | */ |
| 1606 | PJ_DEF(pj_status_t) pjsip_parse_status_line( char *buf, pj_size_t size, |
| 1607 | pjsip_status_line *status_line) |
| 1608 | { |
| 1609 | pj_scanner scanner; |
| 1610 | PJ_USE_EXCEPTION; |
| 1611 | |
| 1612 | pj_bzero(status_line, sizeof(*status_line)); |
| 1613 | pj_scan_init(&scanner, buf, size, PJ_SCAN_AUTOSKIP_WS_HEADER, |
| 1614 | &on_syntax_error); |
| 1615 | |
| 1616 | PJ_TRY { |
| 1617 | int_parse_status_line(&scanner, status_line); |
| 1618 | } |
| 1619 | PJ_CATCH_ANY { |
| 1620 | /* Tolerate the error if it is caused only by missing newline */ |
| 1621 | if (status_line->code == 0 && status_line->reason.slen == 0) { |
| 1622 | pj_scan_fini(&scanner); |
| 1623 | return PJSIP_EINVALIDMSG; |
| 1624 | } |
| 1625 | } |
| 1626 | PJ_END; |
| 1627 | |
| 1628 | pj_scan_fini(&scanner); |
| 1629 | return PJ_SUCCESS; |
| 1630 | } |
| 1631 | |
| 1632 | |
| 1633 | /* Parse ending of header. */ |
| 1634 | static void parse_hdr_end( pj_scanner *scanner ) |
| 1635 | { |
| 1636 | if (pj_scan_is_eof(scanner)) { |
| 1637 | ; /* Do nothing. */ |
| 1638 | } else if (*scanner->curptr == '&') { |
| 1639 | pj_scan_get_char(scanner); |
| 1640 | } else { |
| 1641 | pj_scan_get_newline(scanner); |
| 1642 | } |
| 1643 | } |
| 1644 | |
| 1645 | /* Parse ending of header. */ |
| 1646 | PJ_DEF(void) pjsip_parse_end_hdr_imp( pj_scanner *scanner ) |
| 1647 | { |
| 1648 | parse_hdr_end(scanner); |
| 1649 | } |
| 1650 | |
| 1651 | /* Parse generic array header. */ |
| 1652 | static void parse_generic_array_hdr( pjsip_generic_array_hdr *hdr, |
| 1653 | pj_scanner *scanner) |
| 1654 | { |
| 1655 | /* Some header fields allow empty elements in the value: |
| 1656 | * Accept, Allow, Supported |
| 1657 | */ |
| 1658 | if (pj_scan_is_eof(scanner) || |
| 1659 | *scanner->curptr == '\r' || *scanner->curptr == '\n') |
| 1660 | { |
| 1661 | goto end; |
| 1662 | } |
| 1663 | |
| 1664 | if (hdr->count >= PJ_ARRAY_SIZE(hdr->values)) { |
| 1665 | /* Too many elements */ |
| 1666 | on_syntax_error(scanner); |
| 1667 | return; |
| 1668 | } |
| 1669 | |
| 1670 | pj_scan_get( scanner, &pconst.pjsip_NOT_COMMA_OR_NEWLINE, |
| 1671 | &hdr->values[hdr->count]); |
| 1672 | hdr->count++; |
| 1673 | |
| 1674 | while (*scanner->curptr == ',') { |
| 1675 | pj_scan_get_char(scanner); |
| 1676 | pj_scan_get( scanner, &pconst.pjsip_NOT_COMMA_OR_NEWLINE, |
| 1677 | &hdr->values[hdr->count]); |
| 1678 | hdr->count++; |
| 1679 | |
| 1680 | if (hdr->count >= PJSIP_GENERIC_ARRAY_MAX_COUNT) |
| 1681 | break; |
| 1682 | } |
| 1683 | |
| 1684 | end: |
| 1685 | parse_hdr_end(scanner); |
| 1686 | } |
| 1687 | |
| 1688 | /* Parse generic array header. */ |
| 1689 | PJ_DEF(void) pjsip_parse_generic_array_hdr_imp( pjsip_generic_array_hdr *hdr, |
| 1690 | pj_scanner *scanner) |
| 1691 | { |
| 1692 | parse_generic_array_hdr(hdr, scanner); |
| 1693 | } |
| 1694 | |
| 1695 | |
| 1696 | /* Parse generic string header. */ |
| 1697 | static void parse_generic_string_hdr( pjsip_generic_string_hdr *hdr, |
| 1698 | pjsip_parse_ctx *ctx) |
| 1699 | { |
| 1700 | pj_scanner *scanner = ctx->scanner; |
| 1701 | |
| 1702 | hdr->hvalue.slen = 0; |
| 1703 | |
| 1704 | /* header may be mangled hence the loop */ |
| 1705 | while (pj_cis_match(&pconst.pjsip_NOT_NEWLINE, *scanner->curptr)) { |
| 1706 | pj_str_t next, tmp; |
| 1707 | |
| 1708 | pj_scan_get( scanner, &pconst.pjsip_NOT_NEWLINE, &hdr->hvalue); |
| 1709 | if (pj_scan_is_eof(scanner) || IS_NEWLINE(*scanner->curptr)) |
| 1710 | break; |
| 1711 | /* mangled, get next fraction */ |
| 1712 | pj_scan_get( scanner, &pconst.pjsip_NOT_NEWLINE, &next); |
| 1713 | /* concatenate */ |
| 1714 | tmp.ptr = (char*)pj_pool_alloc(ctx->pool, |
| 1715 | hdr->hvalue.slen + next.slen + 2); |
| 1716 | tmp.slen = 0; |
| 1717 | pj_strcpy(&tmp, &hdr->hvalue); |
| 1718 | pj_strcat2(&tmp, " "); |
| 1719 | pj_strcat(&tmp, &next); |
| 1720 | tmp.ptr[tmp.slen] = '\0'; |
| 1721 | |
| 1722 | hdr->hvalue = tmp; |
| 1723 | } |
| 1724 | |
| 1725 | parse_hdr_end(scanner); |
| 1726 | } |
| 1727 | |
| 1728 | /* Parse generic integer header. */ |
| 1729 | static void parse_generic_int_hdr( pjsip_generic_int_hdr *hdr, |
| 1730 | pj_scanner *scanner ) |
| 1731 | { |
| 1732 | pj_str_t tmp; |
| 1733 | pj_scan_get( scanner, &pconst.pjsip_DIGIT_SPEC, &tmp); |
| 1734 | hdr->ivalue = pj_strtoul(&tmp); |
| 1735 | parse_hdr_end(scanner); |
| 1736 | } |
| 1737 | |
| 1738 | |
| 1739 | /* Parse Accept header. */ |
| 1740 | static pjsip_hdr* parse_hdr_accept(pjsip_parse_ctx *ctx) |
| 1741 | { |
| 1742 | pjsip_accept_hdr *accept = pjsip_accept_hdr_create(ctx->pool); |
| 1743 | parse_generic_array_hdr(accept, ctx->scanner); |
| 1744 | return (pjsip_hdr*)accept; |
| 1745 | } |
| 1746 | |
| 1747 | /* Parse Allow header. */ |
| 1748 | static pjsip_hdr* parse_hdr_allow(pjsip_parse_ctx *ctx) |
| 1749 | { |
| 1750 | pjsip_allow_hdr *allow = pjsip_allow_hdr_create(ctx->pool); |
| 1751 | parse_generic_array_hdr(allow, ctx->scanner); |
| 1752 | return (pjsip_hdr*)allow; |
| 1753 | } |
| 1754 | |
| 1755 | /* Parse Call-ID header. */ |
| 1756 | static pjsip_hdr* parse_hdr_call_id(pjsip_parse_ctx *ctx) |
| 1757 | { |
| 1758 | pjsip_cid_hdr *hdr = pjsip_cid_hdr_create(ctx->pool); |
| 1759 | pj_scan_get( ctx->scanner, &pconst.pjsip_NOT_NEWLINE, &hdr->id); |
| 1760 | parse_hdr_end(ctx->scanner); |
| 1761 | |
| 1762 | if (ctx->rdata) |
| 1763 | ctx->rdata->msg_info.cid = hdr; |
| 1764 | |
| 1765 | return (pjsip_hdr*)hdr; |
| 1766 | } |
| 1767 | |
| 1768 | /* Parse and interpret Contact param. */ |
| 1769 | static void int_parse_contact_param( pjsip_contact_hdr *hdr, |
| 1770 | pj_scanner *scanner, |
| 1771 | pj_pool_t *pool) |
| 1772 | { |
| 1773 | while ( *scanner->curptr == ';' ) { |
| 1774 | pj_str_t pname, pvalue; |
| 1775 | |
| 1776 | int_parse_param( scanner, pool, &pname, &pvalue, 0); |
| 1777 | if (!parser_stricmp(pname, pconst.pjsip_Q_STR) && pvalue.slen) { |
| 1778 | char *dot_pos = (char*) pj_memchr(pvalue.ptr, '.', pvalue.slen); |
| 1779 | if (!dot_pos) { |
| 1780 | hdr->q1000 = pj_strtoul(&pvalue) * 1000; |
| 1781 | } else { |
| 1782 | pj_str_t tmp = pvalue; |
| 1783 | |
| 1784 | tmp.slen = dot_pos - pvalue.ptr; |
| 1785 | hdr->q1000 = pj_strtoul(&tmp) * 1000; |
| 1786 | |
| 1787 | pvalue.slen = (pvalue.ptr+pvalue.slen) - (dot_pos+1); |
| 1788 | pvalue.ptr = dot_pos + 1; |
| 1789 | hdr->q1000 += pj_strtoul_mindigit(&pvalue, 3); |
| 1790 | } |
| 1791 | } else if (!parser_stricmp(pname, pconst.pjsip_EXPIRES_STR) && pvalue.slen) { |
| 1792 | hdr->expires = pj_strtoul(&pvalue); |
| 1793 | |
| 1794 | } else { |
| 1795 | pjsip_param *p = PJ_POOL_ALLOC_T(pool, pjsip_param); |
| 1796 | p->name = pname; |
| 1797 | p->value = pvalue; |
| 1798 | pj_list_insert_before(&hdr->other_param, p); |
| 1799 | } |
| 1800 | } |
| 1801 | } |
| 1802 | |
| 1803 | /* Parse Contact header. */ |
| 1804 | static pjsip_hdr* parse_hdr_contact( pjsip_parse_ctx *ctx ) |
| 1805 | { |
| 1806 | pjsip_contact_hdr *first = NULL; |
| 1807 | pj_scanner *scanner = ctx->scanner; |
| 1808 | |
| 1809 | do { |
| 1810 | pjsip_contact_hdr *hdr = pjsip_contact_hdr_create(ctx->pool); |
| 1811 | if (first == NULL) |
| 1812 | first = hdr; |
| 1813 | else |
| 1814 | pj_list_insert_before(first, hdr); |
| 1815 | |
| 1816 | if (*scanner->curptr == '*') { |
| 1817 | pj_scan_get_char(scanner); |
| 1818 | hdr->star = 1; |
| 1819 | |
| 1820 | } else { |
| 1821 | hdr->star = 0; |
| 1822 | hdr->uri = int_parse_uri_or_name_addr(scanner, ctx->pool, |
| 1823 | PJSIP_PARSE_URI_AS_NAMEADDR | |
| 1824 | PJSIP_PARSE_URI_IN_FROM_TO_HDR); |
| 1825 | |
| 1826 | int_parse_contact_param(hdr, scanner, ctx->pool); |
| 1827 | } |
| 1828 | |
| 1829 | if (*scanner->curptr != ',') |
| 1830 | break; |
| 1831 | |
| 1832 | pj_scan_get_char(scanner); |
| 1833 | |
| 1834 | } while (1); |
| 1835 | |
| 1836 | parse_hdr_end(scanner); |
| 1837 | |
| 1838 | return (pjsip_hdr*)first; |
| 1839 | } |
| 1840 | |
| 1841 | /* Parse Content-Length header. */ |
| 1842 | static pjsip_hdr* parse_hdr_content_len( pjsip_parse_ctx *ctx ) |
| 1843 | { |
| 1844 | pj_str_t digit; |
| 1845 | pjsip_clen_hdr *hdr; |
| 1846 | |
| 1847 | hdr = pjsip_clen_hdr_create(ctx->pool); |
| 1848 | pj_scan_get(ctx->scanner, &pconst.pjsip_DIGIT_SPEC, &digit); |
| 1849 | hdr->len = pj_strtoul(&digit); |
| 1850 | parse_hdr_end(ctx->scanner); |
| 1851 | |
| 1852 | if (ctx->rdata) |
| 1853 | ctx->rdata->msg_info.clen = hdr; |
| 1854 | |
| 1855 | return (pjsip_hdr*)hdr; |
| 1856 | } |
| 1857 | |
| 1858 | /* Parse Content-Type header. */ |
| 1859 | static pjsip_hdr* parse_hdr_content_type( pjsip_parse_ctx *ctx ) |
| 1860 | { |
| 1861 | pjsip_ctype_hdr *hdr; |
| 1862 | pj_scanner *scanner = ctx->scanner; |
| 1863 | |
| 1864 | hdr = pjsip_ctype_hdr_create(ctx->pool); |
| 1865 | |
| 1866 | /* Parse media type and subtype. */ |
| 1867 | pj_scan_get(scanner, &pconst.pjsip_TOKEN_SPEC, &hdr->media.type); |
| 1868 | pj_scan_get_char(scanner); |
| 1869 | pj_scan_get(scanner, &pconst.pjsip_TOKEN_SPEC, &hdr->media.subtype); |
| 1870 | |
| 1871 | /* Parse media parameters */ |
| 1872 | while (*scanner->curptr == ';') { |
| 1873 | pjsip_param *param = PJ_POOL_ALLOC_T(ctx->pool, pjsip_param); |
| 1874 | int_parse_param(scanner, ctx->pool, ¶m->name, ¶m->value, 0); |
| 1875 | pj_list_push_back(&hdr->media.param, param); |
| 1876 | } |
| 1877 | |
| 1878 | parse_hdr_end(ctx->scanner); |
| 1879 | |
| 1880 | if (ctx->rdata) |
| 1881 | ctx->rdata->msg_info.ctype = hdr; |
| 1882 | |
| 1883 | return (pjsip_hdr*)hdr; |
| 1884 | } |
| 1885 | |
| 1886 | /* Parse CSeq header. */ |
| 1887 | static pjsip_hdr* parse_hdr_cseq( pjsip_parse_ctx *ctx ) |
| 1888 | { |
| 1889 | pj_str_t cseq, method; |
| 1890 | pjsip_cseq_hdr *hdr; |
| 1891 | |
| 1892 | hdr = pjsip_cseq_hdr_create(ctx->pool); |
| 1893 | pj_scan_get( ctx->scanner, &pconst.pjsip_DIGIT_SPEC, &cseq); |
| 1894 | hdr->cseq = pj_strtoul(&cseq); |
| 1895 | |
| 1896 | pj_scan_get( ctx->scanner, &pconst.pjsip_TOKEN_SPEC, &method); |
| 1897 | pjsip_method_init_np(&hdr->method, &method); |
| 1898 | |
| 1899 | parse_hdr_end( ctx->scanner ); |
| 1900 | |
| 1901 | if (ctx->rdata) |
| 1902 | ctx->rdata->msg_info.cseq = hdr; |
| 1903 | |
| 1904 | return (pjsip_hdr*)hdr; |
| 1905 | } |
| 1906 | |
| 1907 | /* Parse Expires header. */ |
| 1908 | static pjsip_hdr* parse_hdr_expires(pjsip_parse_ctx *ctx) |
| 1909 | { |
| 1910 | pjsip_expires_hdr *hdr = pjsip_expires_hdr_create(ctx->pool, 0); |
| 1911 | parse_generic_int_hdr(hdr, ctx->scanner); |
| 1912 | return (pjsip_hdr*)hdr; |
| 1913 | } |
| 1914 | |
| 1915 | /* Parse From: or To: header. */ |
| 1916 | static void parse_hdr_fromto( pj_scanner *scanner, |
| 1917 | pj_pool_t *pool, |
| 1918 | pjsip_from_hdr *hdr) |
| 1919 | { |
| 1920 | hdr->uri = int_parse_uri_or_name_addr(scanner, pool, |
| 1921 | PJSIP_PARSE_URI_AS_NAMEADDR | |
| 1922 | PJSIP_PARSE_URI_IN_FROM_TO_HDR); |
| 1923 | |
| 1924 | while ( *scanner->curptr == ';' ) { |
| 1925 | pj_str_t pname, pvalue; |
| 1926 | |
| 1927 | int_parse_param( scanner, pool, &pname, &pvalue, 0); |
| 1928 | |
| 1929 | if (!parser_stricmp(pname, pconst.pjsip_TAG_STR)) { |
| 1930 | hdr->tag = pvalue; |
| 1931 | |
| 1932 | } else { |
| 1933 | pjsip_param *p = PJ_POOL_ALLOC_T(pool, pjsip_param); |
| 1934 | p->name = pname; |
| 1935 | p->value = pvalue; |
| 1936 | pj_list_insert_before(&hdr->other_param, p); |
| 1937 | } |
| 1938 | } |
| 1939 | |
| 1940 | parse_hdr_end(scanner); |
| 1941 | } |
| 1942 | |
| 1943 | /* Parse From: header. */ |
| 1944 | static pjsip_hdr* parse_hdr_from( pjsip_parse_ctx *ctx ) |
| 1945 | { |
| 1946 | pjsip_from_hdr *hdr = pjsip_from_hdr_create(ctx->pool); |
| 1947 | parse_hdr_fromto(ctx->scanner, ctx->pool, hdr); |
| 1948 | if (ctx->rdata) |
| 1949 | ctx->rdata->msg_info.from = hdr; |
| 1950 | |
| 1951 | return (pjsip_hdr*)hdr; |
| 1952 | } |
| 1953 | |
| 1954 | /* Parse Require: header. */ |
| 1955 | static pjsip_hdr* parse_hdr_require( pjsip_parse_ctx *ctx ) |
| 1956 | { |
| 1957 | pjsip_require_hdr *hdr; |
| 1958 | pj_bool_t new_hdr = (ctx->rdata==NULL || |
| 1959 | ctx->rdata->msg_info.require == NULL); |
| 1960 | |
| 1961 | if (ctx->rdata && ctx->rdata->msg_info.require) { |
| 1962 | hdr = ctx->rdata->msg_info.require; |
| 1963 | } else { |
| 1964 | hdr = pjsip_require_hdr_create(ctx->pool); |
| 1965 | if (ctx->rdata) |
| 1966 | ctx->rdata->msg_info.require = hdr; |
| 1967 | } |
| 1968 | |
| 1969 | parse_generic_array_hdr(hdr, ctx->scanner); |
| 1970 | |
| 1971 | return new_hdr ? (pjsip_hdr*)hdr : NULL; |
| 1972 | } |
| 1973 | |
| 1974 | /* Parse Retry-After: header. */ |
| 1975 | static pjsip_hdr* parse_hdr_retry_after(pjsip_parse_ctx *ctx) |
| 1976 | { |
| 1977 | pjsip_retry_after_hdr *hdr; |
| 1978 | pj_scanner *scanner = ctx->scanner; |
| 1979 | pj_str_t tmp; |
| 1980 | |
| 1981 | hdr = pjsip_retry_after_hdr_create(ctx->pool, 0); |
| 1982 | |
| 1983 | pj_scan_get(scanner, &pconst.pjsip_DIGIT_SPEC, &tmp); |
| 1984 | hdr->ivalue = pj_strtoul(&tmp); |
| 1985 | |
| 1986 | while (!pj_scan_is_eof(scanner) && *scanner->curptr!='\r' && |
| 1987 | *scanner->curptr!='\n') |
| 1988 | { |
| 1989 | if (*scanner->curptr=='(') { |
| 1990 | pj_scan_get_quote(scanner, '(', ')', &hdr->comment); |
| 1991 | /* Trim the leading and ending parens */ |
| 1992 | hdr->comment.ptr++; |
| 1993 | hdr->comment.slen -= 2; |
| 1994 | } else if (*scanner->curptr==';') { |
| 1995 | pjsip_param *prm = PJ_POOL_ALLOC_T(ctx->pool, pjsip_param); |
| 1996 | int_parse_param(scanner, ctx->pool, &prm->name, &prm->value, 0); |
| 1997 | pj_list_push_back(&hdr->param, prm); |
| 1998 | } |
| 1999 | } |
| 2000 | |
| 2001 | parse_hdr_end(scanner); |
| 2002 | return (pjsip_hdr*)hdr; |
| 2003 | } |
| 2004 | |
| 2005 | /* Parse Supported: header. */ |
| 2006 | static pjsip_hdr* parse_hdr_supported(pjsip_parse_ctx *ctx) |
| 2007 | { |
| 2008 | pjsip_supported_hdr *hdr; |
| 2009 | pj_bool_t new_hdr = (ctx->rdata==NULL || |
| 2010 | ctx->rdata->msg_info.supported == NULL); |
| 2011 | |
| 2012 | if (ctx->rdata && ctx->rdata->msg_info.supported) { |
| 2013 | hdr = ctx->rdata->msg_info.supported; |
| 2014 | } else { |
| 2015 | hdr = pjsip_supported_hdr_create(ctx->pool); |
| 2016 | if (ctx->rdata) |
| 2017 | ctx->rdata->msg_info.supported = hdr; |
| 2018 | } |
| 2019 | |
| 2020 | parse_generic_array_hdr(hdr, ctx->scanner); |
| 2021 | return new_hdr ? (pjsip_hdr*)hdr : NULL; |
| 2022 | } |
| 2023 | |
| 2024 | /* Parse To: header. */ |
| 2025 | static pjsip_hdr* parse_hdr_to( pjsip_parse_ctx *ctx ) |
| 2026 | { |
| 2027 | pjsip_to_hdr *hdr = pjsip_to_hdr_create(ctx->pool); |
| 2028 | parse_hdr_fromto(ctx->scanner, ctx->pool, hdr); |
| 2029 | |
| 2030 | if (ctx->rdata) |
| 2031 | ctx->rdata->msg_info.to = hdr; |
| 2032 | |
| 2033 | return (pjsip_hdr*)hdr; |
| 2034 | } |
| 2035 | |
| 2036 | /* Parse Unsupported: header. */ |
| 2037 | static pjsip_hdr* parse_hdr_unsupported(pjsip_parse_ctx *ctx) |
| 2038 | { |
| 2039 | pjsip_unsupported_hdr *hdr = pjsip_unsupported_hdr_create(ctx->pool); |
| 2040 | parse_generic_array_hdr(hdr, ctx->scanner); |
| 2041 | return (pjsip_hdr*)hdr; |
| 2042 | } |
| 2043 | |
| 2044 | /* Parse and interpret Via parameters. */ |
| 2045 | static void int_parse_via_param( pjsip_via_hdr *hdr, pj_scanner *scanner, |
| 2046 | pj_pool_t *pool) |
| 2047 | { |
| 2048 | while ( *scanner->curptr == ';' ) { |
| 2049 | pj_str_t pname, pvalue; |
| 2050 | |
| 2051 | //Parse with PARAM_CHAR instead, to allow IPv6 |
| 2052 | //No, back to using int_parse_param() for the "`" character! |
| 2053 | //int_parse_param( scanner, pool, &pname, &pvalue, 0); |
| 2054 | //parse_param_imp(scanner, pool, &pname, &pvalue, |
| 2055 | // &pconst.pjsip_TOKEN_SPEC, |
| 2056 | // &pconst.pjsip_TOKEN_SPEC_ESC, 0); |
| 2057 | //int_parse_param(scanner, pool, &pname, &pvalue, 0); |
| 2058 | // This should be the correct one: |
| 2059 | // added special spec for Via parameter, basically token plus |
| 2060 | // ":" to allow IPv6 address in the received param. |
| 2061 | pj_scan_get_char(scanner); |
| 2062 | parse_param_imp(scanner, pool, &pname, &pvalue, |
| 2063 | &pconst.pjsip_VIA_PARAM_SPEC, |
| 2064 | &pconst.pjsip_VIA_PARAM_SPEC_ESC, |
| 2065 | 0); |
| 2066 | |
| 2067 | if (!parser_stricmp(pname, pconst.pjsip_BRANCH_STR) && pvalue.slen) { |
| 2068 | hdr->branch_param = pvalue; |
| 2069 | |
| 2070 | } else if (!parser_stricmp(pname, pconst.pjsip_TTL_STR) && pvalue.slen) { |
| 2071 | hdr->ttl_param = pj_strtoul(&pvalue); |
| 2072 | |
| 2073 | } else if (!parser_stricmp(pname, pconst.pjsip_MADDR_STR) && pvalue.slen) { |
| 2074 | hdr->maddr_param = pvalue; |
| 2075 | |
| 2076 | } else if (!parser_stricmp(pname, pconst.pjsip_RECEIVED_STR) && pvalue.slen) { |
| 2077 | hdr->recvd_param = pvalue; |
| 2078 | |
| 2079 | } else if (!parser_stricmp(pname, pconst.pjsip_RPORT_STR)) { |
| 2080 | if (pvalue.slen) |
| 2081 | hdr->rport_param = pj_strtoul(&pvalue); |
| 2082 | else |
| 2083 | hdr->rport_param = 0; |
| 2084 | } else { |
| 2085 | pjsip_param *p = PJ_POOL_ALLOC_T(pool, pjsip_param); |
| 2086 | p->name = pname; |
| 2087 | p->value = pvalue; |
| 2088 | pj_list_insert_before(&hdr->other_param, p); |
| 2089 | } |
| 2090 | } |
| 2091 | } |
| 2092 | |
| 2093 | /* Parse Max-Forwards header. */ |
| 2094 | static pjsip_hdr* parse_hdr_max_forwards( pjsip_parse_ctx *ctx ) |
| 2095 | { |
| 2096 | pjsip_max_fwd_hdr *hdr; |
| 2097 | hdr = pjsip_max_fwd_hdr_create(ctx->pool, 0); |
| 2098 | parse_generic_int_hdr(hdr, ctx->scanner); |
| 2099 | |
| 2100 | if (ctx->rdata) |
| 2101 | ctx->rdata->msg_info.max_fwd = hdr; |
| 2102 | |
| 2103 | return (pjsip_hdr*)hdr; |
| 2104 | } |
| 2105 | |
| 2106 | /* Parse Min-Expires header. */ |
| 2107 | static pjsip_hdr* parse_hdr_min_expires(pjsip_parse_ctx *ctx) |
| 2108 | { |
| 2109 | pjsip_min_expires_hdr *hdr; |
| 2110 | hdr = pjsip_min_expires_hdr_create(ctx->pool, 0); |
| 2111 | parse_generic_int_hdr(hdr, ctx->scanner); |
| 2112 | return (pjsip_hdr*)hdr; |
| 2113 | } |
| 2114 | |
| 2115 | |
| 2116 | /* Parse Route: or Record-Route: header. */ |
| 2117 | static void parse_hdr_rr_route( pj_scanner *scanner, pj_pool_t *pool, |
| 2118 | pjsip_routing_hdr *hdr ) |
| 2119 | { |
| 2120 | pjsip_name_addr *temp=int_parse_name_addr(scanner, pool); |
| 2121 | |
| 2122 | pj_memcpy(&hdr->name_addr, temp, sizeof(*temp)); |
| 2123 | |
| 2124 | while (*scanner->curptr == ';') { |
| 2125 | pjsip_param *p = PJ_POOL_ALLOC_T(pool, pjsip_param); |
| 2126 | int_parse_param(scanner, pool, &p->name, &p->value, 0); |
| 2127 | pj_list_insert_before(&hdr->other_param, p); |
| 2128 | } |
| 2129 | } |
| 2130 | |
| 2131 | /* Parse Record-Route header. */ |
| 2132 | static pjsip_hdr* parse_hdr_rr( pjsip_parse_ctx *ctx) |
| 2133 | { |
| 2134 | pjsip_rr_hdr *first = NULL; |
| 2135 | pj_scanner *scanner = ctx->scanner; |
| 2136 | |
| 2137 | do { |
| 2138 | pjsip_rr_hdr *hdr = pjsip_rr_hdr_create(ctx->pool); |
| 2139 | if (!first) { |
| 2140 | first = hdr; |
| 2141 | } else { |
| 2142 | pj_list_insert_before(first, hdr); |
| 2143 | } |
| 2144 | parse_hdr_rr_route(scanner, ctx->pool, hdr); |
| 2145 | if (*scanner->curptr == ',') { |
| 2146 | pj_scan_get_char(scanner); |
| 2147 | } else { |
| 2148 | break; |
| 2149 | } |
| 2150 | } while (1); |
| 2151 | parse_hdr_end(scanner); |
| 2152 | |
| 2153 | if (ctx->rdata && ctx->rdata->msg_info.record_route==NULL) |
| 2154 | ctx->rdata->msg_info.record_route = first; |
| 2155 | |
| 2156 | return (pjsip_hdr*)first; |
| 2157 | } |
| 2158 | |
| 2159 | /* Parse Route: header. */ |
| 2160 | static pjsip_hdr* parse_hdr_route( pjsip_parse_ctx *ctx ) |
| 2161 | { |
| 2162 | pjsip_route_hdr *first = NULL; |
| 2163 | pj_scanner *scanner = ctx->scanner; |
| 2164 | |
| 2165 | do { |
| 2166 | pjsip_route_hdr *hdr = pjsip_route_hdr_create(ctx->pool); |
| 2167 | if (!first) { |
| 2168 | first = hdr; |
| 2169 | } else { |
| 2170 | pj_list_insert_before(first, hdr); |
| 2171 | } |
| 2172 | parse_hdr_rr_route(scanner, ctx->pool, hdr); |
| 2173 | if (*scanner->curptr == ',') { |
| 2174 | pj_scan_get_char(scanner); |
| 2175 | } else { |
| 2176 | break; |
| 2177 | } |
| 2178 | } while (1); |
| 2179 | parse_hdr_end(scanner); |
| 2180 | |
| 2181 | if (ctx->rdata && ctx->rdata->msg_info.route==NULL) |
| 2182 | ctx->rdata->msg_info.route = first; |
| 2183 | |
| 2184 | return (pjsip_hdr*)first; |
| 2185 | } |
| 2186 | |
| 2187 | /* Parse Via: header. */ |
| 2188 | static pjsip_hdr* parse_hdr_via( pjsip_parse_ctx *ctx ) |
| 2189 | { |
| 2190 | pjsip_via_hdr *first = NULL; |
| 2191 | pj_scanner *scanner = ctx->scanner; |
| 2192 | |
| 2193 | do { |
| 2194 | pjsip_via_hdr *hdr = pjsip_via_hdr_create(ctx->pool); |
| 2195 | if (!first) |
| 2196 | first = hdr; |
| 2197 | else |
| 2198 | pj_list_insert_before(first, hdr); |
| 2199 | |
| 2200 | parse_sip_version(scanner); |
| 2201 | if (pj_scan_get_char(scanner) != '/') |
| 2202 | on_syntax_error(scanner); |
| 2203 | |
| 2204 | pj_scan_get( scanner, &pconst.pjsip_TOKEN_SPEC, &hdr->transport); |
| 2205 | int_parse_host(scanner, &hdr->sent_by.host); |
| 2206 | |
| 2207 | if (*scanner->curptr==':') { |
| 2208 | pj_str_t digit; |
| 2209 | pj_scan_get_char(scanner); |
| 2210 | pj_scan_get(scanner, &pconst.pjsip_DIGIT_SPEC, &digit); |
| 2211 | hdr->sent_by.port = pj_strtoul(&digit); |
| 2212 | } |
| 2213 | |
| 2214 | int_parse_via_param(hdr, scanner, ctx->pool); |
| 2215 | |
| 2216 | if (*scanner->curptr == '(') { |
| 2217 | pj_scan_get_char(scanner); |
| 2218 | pj_scan_get_until_ch( scanner, ')', &hdr->comment); |
| 2219 | pj_scan_get_char( scanner ); |
| 2220 | } |
| 2221 | |
| 2222 | if (*scanner->curptr != ',') |
| 2223 | break; |
| 2224 | |
| 2225 | pj_scan_get_char(scanner); |
| 2226 | |
| 2227 | } while (1); |
| 2228 | |
| 2229 | parse_hdr_end(scanner); |
| 2230 | |
| 2231 | if (ctx->rdata && ctx->rdata->msg_info.via == NULL) |
| 2232 | ctx->rdata->msg_info.via = first; |
| 2233 | |
| 2234 | return (pjsip_hdr*)first; |
| 2235 | } |
| 2236 | |
| 2237 | /* Parse generic header. */ |
| 2238 | static pjsip_hdr* parse_hdr_generic_string( pjsip_parse_ctx *ctx ) |
| 2239 | { |
| 2240 | pjsip_generic_string_hdr *hdr; |
| 2241 | |
| 2242 | hdr = pjsip_generic_string_hdr_create(ctx->pool, NULL, NULL); |
| 2243 | parse_generic_string_hdr(hdr, ctx); |
| 2244 | return (pjsip_hdr*)hdr; |
| 2245 | |
| 2246 | } |
| 2247 | |
| 2248 | /* Public function to parse a header value. */ |
| 2249 | PJ_DEF(void*) pjsip_parse_hdr( pj_pool_t *pool, const pj_str_t *hname, |
| 2250 | char *buf, pj_size_t size, int *parsed_len ) |
| 2251 | { |
| 2252 | pj_scanner scanner; |
| 2253 | pjsip_hdr *hdr = NULL; |
| 2254 | pjsip_parse_ctx context; |
| 2255 | PJ_USE_EXCEPTION; |
| 2256 | |
| 2257 | pj_scan_init(&scanner, buf, size, PJ_SCAN_AUTOSKIP_WS_HEADER, |
| 2258 | &on_syntax_error); |
| 2259 | |
| 2260 | context.scanner = &scanner; |
| 2261 | context.pool = pool; |
| 2262 | context.rdata = NULL; |
| 2263 | |
| 2264 | PJ_TRY { |
| 2265 | pjsip_parse_hdr_func *handler = find_handler(hname); |
| 2266 | if (handler) { |
| 2267 | hdr = (*handler)(&context); |
| 2268 | } else { |
| 2269 | hdr = parse_hdr_generic_string(&context); |
| 2270 | hdr->type = PJSIP_H_OTHER; |
| 2271 | pj_strdup(pool, &hdr->name, hname); |
| 2272 | hdr->sname = hdr->name; |
| 2273 | } |
| 2274 | |
| 2275 | } |
| 2276 | PJ_CATCH_ANY { |
| 2277 | hdr = NULL; |
| 2278 | } |
| 2279 | PJ_END |
| 2280 | |
| 2281 | if (parsed_len) { |
| 2282 | *parsed_len = (unsigned)(scanner.curptr - scanner.begin); |
| 2283 | } |
| 2284 | |
| 2285 | pj_scan_fini(&scanner); |
| 2286 | |
| 2287 | return hdr; |
| 2288 | } |
| 2289 | |
| 2290 | /* Parse multiple header lines */ |
| 2291 | PJ_DEF(pj_status_t) pjsip_parse_headers( pj_pool_t *pool, char *input, |
| 2292 | pj_size_t size, pjsip_hdr *hlist, |
| 2293 | unsigned options) |
| 2294 | { |
| 2295 | enum { STOP_ON_ERROR = 1 }; |
| 2296 | pj_scanner scanner; |
| 2297 | pjsip_parse_ctx ctx; |
| 2298 | pj_str_t hname; |
| 2299 | PJ_USE_EXCEPTION; |
| 2300 | |
| 2301 | pj_scan_init(&scanner, input, size, PJ_SCAN_AUTOSKIP_WS_HEADER, |
| 2302 | &on_syntax_error); |
| 2303 | |
| 2304 | pj_bzero(&ctx, sizeof(ctx)); |
| 2305 | ctx.scanner = &scanner; |
| 2306 | ctx.pool = pool; |
| 2307 | |
| 2308 | retry_parse: |
| 2309 | PJ_TRY |
| 2310 | { |
| 2311 | /* Parse headers. */ |
| 2312 | do { |
| 2313 | pjsip_parse_hdr_func * handler; |
| 2314 | pjsip_hdr *hdr = NULL; |
| 2315 | |
| 2316 | /* Init hname just in case parsing fails. |
| 2317 | * Ref: PROTOS #2412 |
| 2318 | */ |
| 2319 | hname.slen = 0; |
| 2320 | |
| 2321 | /* Get hname. */ |
| 2322 | pj_scan_get( &scanner, &pconst.pjsip_TOKEN_SPEC, &hname); |
| 2323 | if (pj_scan_get_char( &scanner ) != ':') { |
| 2324 | PJ_THROW(PJSIP_SYN_ERR_EXCEPTION); |
| 2325 | } |
| 2326 | |
| 2327 | /* Find handler. */ |
| 2328 | handler = find_handler(&hname); |
| 2329 | |
| 2330 | /* Call the handler if found. |
| 2331 | * If no handler is found, then treat the header as generic |
| 2332 | * hname/hvalue pair. |
| 2333 | */ |
| 2334 | if (handler) { |
| 2335 | hdr = (*handler)(&ctx); |
| 2336 | } else { |
| 2337 | hdr = parse_hdr_generic_string(&ctx); |
| 2338 | hdr->name = hdr->sname = hname; |
| 2339 | } |
| 2340 | |
| 2341 | /* Single parse of header line can produce multiple headers. |
| 2342 | * For example, if one Contact: header contains Contact list |
| 2343 | * separated by comma, then these Contacts will be split into |
| 2344 | * different Contact headers. |
| 2345 | * So here we must insert list instead of just insert one header. |
| 2346 | */ |
| 2347 | if (hdr) |
| 2348 | pj_list_insert_nodes_before(hlist, hdr); |
| 2349 | |
| 2350 | /* Parse until EOF or an empty line is found. */ |
| 2351 | } while (!pj_scan_is_eof(&scanner) && !IS_NEWLINE(*scanner.curptr)); |
| 2352 | |
| 2353 | /* If empty line is found, eat it. */ |
| 2354 | if (!pj_scan_is_eof(&scanner)) { |
| 2355 | if (IS_NEWLINE(*scanner.curptr)) { |
| 2356 | pj_scan_get_newline(&scanner); |
| 2357 | } |
| 2358 | } |
| 2359 | } |
| 2360 | PJ_CATCH_ANY |
| 2361 | { |
| 2362 | PJ_LOG(4,(THIS_FILE, "Error parsing header: '%.*s' line %d col %d", |
| 2363 | (int)hname.slen, hname.ptr, scanner.line, |
| 2364 | pj_scan_get_col(&scanner))); |
| 2365 | |
| 2366 | /* Exception was thrown during parsing. */ |
| 2367 | if ((options & STOP_ON_ERROR) == STOP_ON_ERROR) { |
| 2368 | pj_scan_fini(&scanner); |
| 2369 | return PJSIP_EINVALIDHDR; |
| 2370 | } |
| 2371 | |
| 2372 | /* Skip until newline, and parse next header. */ |
| 2373 | if (!pj_scan_is_eof(&scanner)) { |
| 2374 | /* Skip until next line. |
| 2375 | * Watch for header continuation. |
| 2376 | */ |
| 2377 | do { |
| 2378 | pj_scan_skip_line(&scanner); |
| 2379 | } while (IS_SPACE(*scanner.curptr)); |
| 2380 | } |
| 2381 | |
| 2382 | /* Restore flag. Flag may be set in int_parse_sip_url() */ |
| 2383 | scanner.skip_ws = PJ_SCAN_AUTOSKIP_WS_HEADER; |
| 2384 | |
| 2385 | /* Continue parse next header, if any. */ |
| 2386 | if (!pj_scan_is_eof(&scanner) && !IS_NEWLINE(*scanner.curptr)) { |
| 2387 | goto retry_parse; |
| 2388 | } |
| 2389 | |
| 2390 | } |
| 2391 | PJ_END; |
| 2392 | |
| 2393 | return PJ_SUCCESS; |
| 2394 | } |
| 2395 | |