Tristan Matthews | 0a329cc | 2013-07-17 13:20:14 -0400 | [diff] [blame] | 1 | /* $Id: resolver_test.c 4537 2013-06-19 06:47:43Z riza $ */ |
| 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 <pjlib-util.h> |
| 21 | #include <pjlib.h> |
| 22 | #include "test.h" |
| 23 | |
| 24 | |
| 25 | #define THIS_FILE "srv_resolver_test.c" |
| 26 | |
| 27 | //////////////////////////////////////////////////////////////////////////// |
| 28 | /* |
| 29 | * TODO: create various invalid DNS packets. |
| 30 | */ |
| 31 | |
| 32 | |
| 33 | //////////////////////////////////////////////////////////////////////////// |
| 34 | |
| 35 | |
| 36 | #define ACTION_REPLY 0 |
| 37 | #define ACTION_IGNORE -1 |
| 38 | #define ACTION_CB -2 |
| 39 | |
| 40 | static struct server_t |
| 41 | { |
| 42 | pj_sock_t sock; |
| 43 | pj_uint16_t port; |
| 44 | pj_thread_t *thread; |
| 45 | |
| 46 | /* Action: |
| 47 | * 0: reply with the response in resp. |
| 48 | * -1: ignore query (to simulate timeout). |
| 49 | * other: reply with that error |
| 50 | */ |
| 51 | int action; |
| 52 | |
| 53 | pj_dns_parsed_packet resp; |
| 54 | void (*action_cb)(const pj_dns_parsed_packet *pkt, |
| 55 | pj_dns_parsed_packet **p_res); |
| 56 | |
| 57 | unsigned pkt_count; |
| 58 | |
| 59 | } g_server[2]; |
| 60 | |
| 61 | static pj_pool_t *pool; |
| 62 | static pj_dns_resolver *resolver; |
| 63 | static pj_bool_t thread_quit; |
| 64 | static pj_timer_heap_t *timer_heap; |
| 65 | static pj_ioqueue_t *ioqueue; |
| 66 | static pj_thread_t *poll_thread; |
| 67 | static pj_sem_t *sem; |
| 68 | static pj_dns_settings set; |
| 69 | |
| 70 | #define MAX_LABEL 32 |
| 71 | |
| 72 | struct label_tab |
| 73 | { |
| 74 | unsigned count; |
| 75 | |
| 76 | struct { |
| 77 | unsigned pos; |
| 78 | pj_str_t label; |
| 79 | } a[MAX_LABEL]; |
| 80 | }; |
| 81 | |
| 82 | static void write16(pj_uint8_t *p, pj_uint16_t val) |
| 83 | { |
| 84 | p[0] = (pj_uint8_t)(val >> 8); |
| 85 | p[1] = (pj_uint8_t)(val & 0xFF); |
| 86 | } |
| 87 | |
| 88 | static void write32(pj_uint8_t *p, pj_uint32_t val) |
| 89 | { |
| 90 | val = pj_htonl(val); |
| 91 | pj_memcpy(p, &val, 4); |
| 92 | } |
| 93 | |
| 94 | static int print_name(pj_uint8_t *pkt, int size, |
| 95 | pj_uint8_t *pos, const pj_str_t *name, |
| 96 | struct label_tab *tab) |
| 97 | { |
| 98 | pj_uint8_t *p = pos; |
| 99 | const char *endlabel, *endname; |
| 100 | unsigned i; |
| 101 | pj_str_t label; |
| 102 | |
| 103 | /* Check if name is in the table */ |
| 104 | for (i=0; i<tab->count; ++i) { |
| 105 | if (pj_strcmp(&tab->a[i].label, name)==0) |
| 106 | break; |
| 107 | } |
| 108 | |
| 109 | if (i != tab->count) { |
| 110 | write16(p, (pj_uint16_t)(tab->a[i].pos | (0xc0 << 8))); |
| 111 | return 2; |
| 112 | } else { |
| 113 | if (tab->count < MAX_LABEL) { |
| 114 | tab->a[tab->count].pos = (unsigned)(p-pkt); |
| 115 | tab->a[tab->count].label.ptr = (char*)(p+1); |
| 116 | tab->a[tab->count].label.slen = name->slen; |
| 117 | ++tab->count; |
| 118 | } |
| 119 | } |
| 120 | |
| 121 | endlabel = name->ptr; |
| 122 | endname = name->ptr + name->slen; |
| 123 | |
| 124 | label.ptr = (char*)name->ptr; |
| 125 | |
| 126 | while (endlabel != endname) { |
| 127 | |
| 128 | while (endlabel != endname && *endlabel != '.') |
| 129 | ++endlabel; |
| 130 | |
| 131 | label.slen = (endlabel - label.ptr); |
| 132 | |
| 133 | if (size < label.slen+1) |
| 134 | return -1; |
| 135 | |
| 136 | *p = (pj_uint8_t)label.slen; |
| 137 | pj_memcpy(p+1, label.ptr, label.slen); |
| 138 | |
| 139 | size -= (int)(label.slen+1); |
| 140 | p += (label.slen+1); |
| 141 | |
| 142 | if (endlabel != endname && *endlabel == '.') |
| 143 | ++endlabel; |
| 144 | label.ptr = (char*)endlabel; |
| 145 | } |
| 146 | |
| 147 | if (size == 0) |
| 148 | return -1; |
| 149 | |
| 150 | *p++ = '\0'; |
| 151 | |
| 152 | return (int)(p-pos); |
| 153 | } |
| 154 | |
| 155 | static int print_rr(pj_uint8_t *pkt, int size, pj_uint8_t *pos, |
| 156 | const pj_dns_parsed_rr *rr, struct label_tab *tab) |
| 157 | { |
| 158 | pj_uint8_t *p = pos; |
| 159 | int len; |
| 160 | |
| 161 | len = print_name(pkt, size, pos, &rr->name, tab); |
| 162 | if (len < 0) |
| 163 | return -1; |
| 164 | |
| 165 | p += len; |
| 166 | size -= len; |
| 167 | |
| 168 | if (size < 8) |
| 169 | return -1; |
| 170 | |
| 171 | pj_assert(rr->dnsclass == 1); |
| 172 | |
| 173 | write16(p+0, (pj_uint16_t)rr->type); /* type */ |
| 174 | write16(p+2, (pj_uint16_t)rr->dnsclass); /* class */ |
| 175 | write32(p+4, rr->ttl); /* TTL */ |
| 176 | |
| 177 | p += 8; |
| 178 | size -= 8; |
| 179 | |
| 180 | if (rr->type == PJ_DNS_TYPE_A) { |
| 181 | |
| 182 | if (size < 6) |
| 183 | return -1; |
| 184 | |
| 185 | /* RDLEN is 4 */ |
| 186 | write16(p, 4); |
| 187 | |
| 188 | /* Address */ |
| 189 | pj_memcpy(p+2, &rr->rdata.a.ip_addr, 4); |
| 190 | |
| 191 | p += 6; |
| 192 | size -= 6; |
| 193 | |
| 194 | } else if (rr->type == PJ_DNS_TYPE_CNAME || |
| 195 | rr->type == PJ_DNS_TYPE_NS || |
| 196 | rr->type == PJ_DNS_TYPE_PTR) { |
| 197 | |
| 198 | if (size < 4) |
| 199 | return -1; |
| 200 | |
| 201 | len = print_name(pkt, size-2, p+2, &rr->rdata.cname.name, tab); |
| 202 | if (len < 0) |
| 203 | return -1; |
| 204 | |
| 205 | write16(p, (pj_uint16_t)len); |
| 206 | |
| 207 | p += (len + 2); |
| 208 | size -= (len + 2); |
| 209 | |
| 210 | } else if (rr->type == PJ_DNS_TYPE_SRV) { |
| 211 | |
| 212 | if (size < 10) |
| 213 | return -1; |
| 214 | |
| 215 | write16(p+2, rr->rdata.srv.prio); /* Priority */ |
| 216 | write16(p+4, rr->rdata.srv.weight); /* Weight */ |
| 217 | write16(p+6, rr->rdata.srv.port); /* Port */ |
| 218 | |
| 219 | /* Target */ |
| 220 | len = print_name(pkt, size-8, p+8, &rr->rdata.srv.target, tab); |
| 221 | if (len < 0) |
| 222 | return -1; |
| 223 | |
| 224 | /* RDLEN */ |
| 225 | write16(p, (pj_uint16_t)(len + 6)); |
| 226 | |
| 227 | p += (len + 8); |
| 228 | size -= (len + 8); |
| 229 | |
| 230 | } else { |
| 231 | pj_assert(!"Not supported"); |
| 232 | return -1; |
| 233 | } |
| 234 | |
| 235 | return (int)(p-pos); |
| 236 | } |
| 237 | |
| 238 | static int print_packet(const pj_dns_parsed_packet *rec, pj_uint8_t *pkt, |
| 239 | int size) |
| 240 | { |
| 241 | pj_uint8_t *p = pkt; |
| 242 | struct label_tab tab; |
| 243 | int i, len; |
| 244 | |
| 245 | tab.count = 0; |
| 246 | |
| 247 | #if 0 |
| 248 | pj_enter_critical_section(); |
| 249 | PJ_LOG(3,(THIS_FILE, "Sending response:")); |
| 250 | pj_dns_dump_packet(rec); |
| 251 | pj_leave_critical_section(); |
| 252 | #endif |
| 253 | |
| 254 | pj_assert(sizeof(pj_dns_hdr)==12); |
| 255 | if (size < (int)sizeof(pj_dns_hdr)) |
| 256 | return -1; |
| 257 | |
| 258 | /* Initialize header */ |
| 259 | write16(p+0, rec->hdr.id); |
| 260 | write16(p+2, rec->hdr.flags); |
| 261 | write16(p+4, rec->hdr.qdcount); |
| 262 | write16(p+6, rec->hdr.anscount); |
| 263 | write16(p+8, rec->hdr.nscount); |
| 264 | write16(p+10, rec->hdr.arcount); |
| 265 | |
| 266 | p = pkt + sizeof(pj_dns_hdr); |
| 267 | size -= sizeof(pj_dns_hdr); |
| 268 | |
| 269 | /* Print queries */ |
| 270 | for (i=0; i<rec->hdr.qdcount; ++i) { |
| 271 | |
| 272 | len = print_name(pkt, size, p, &rec->q[i].name, &tab); |
| 273 | if (len < 0) |
| 274 | return -1; |
| 275 | |
| 276 | p += len; |
| 277 | size -= len; |
| 278 | |
| 279 | if (size < 4) |
| 280 | return -1; |
| 281 | |
| 282 | /* Set type */ |
| 283 | write16(p+0, (pj_uint16_t)rec->q[i].type); |
| 284 | |
| 285 | /* Set class (IN=1) */ |
| 286 | pj_assert(rec->q[i].dnsclass == 1); |
| 287 | write16(p+2, rec->q[i].dnsclass); |
| 288 | |
| 289 | p += 4; |
| 290 | } |
| 291 | |
| 292 | /* Print answers */ |
| 293 | for (i=0; i<rec->hdr.anscount; ++i) { |
| 294 | len = print_rr(pkt, size, p, &rec->ans[i], &tab); |
| 295 | if (len < 0) |
| 296 | return -1; |
| 297 | |
| 298 | p += len; |
| 299 | size -= len; |
| 300 | } |
| 301 | |
| 302 | /* Print NS records */ |
| 303 | for (i=0; i<rec->hdr.nscount; ++i) { |
| 304 | len = print_rr(pkt, size, p, &rec->ns[i], &tab); |
| 305 | if (len < 0) |
| 306 | return -1; |
| 307 | |
| 308 | p += len; |
| 309 | size -= len; |
| 310 | } |
| 311 | |
| 312 | /* Print additional records */ |
| 313 | for (i=0; i<rec->hdr.arcount; ++i) { |
| 314 | len = print_rr(pkt, size, p, &rec->arr[i], &tab); |
| 315 | if (len < 0) |
| 316 | return -1; |
| 317 | |
| 318 | p += len; |
| 319 | size -= len; |
| 320 | } |
| 321 | |
| 322 | return (int)(p - pkt); |
| 323 | } |
| 324 | |
| 325 | |
| 326 | static int server_thread(void *p) |
| 327 | { |
| 328 | struct server_t *srv = (struct server_t*)p; |
| 329 | |
| 330 | while (!thread_quit) { |
| 331 | pj_fd_set_t rset; |
| 332 | pj_time_val timeout = {0, 500}; |
| 333 | pj_sockaddr_in src_addr; |
| 334 | pj_dns_parsed_packet *req; |
| 335 | char pkt[1024]; |
| 336 | pj_ssize_t pkt_len; |
| 337 | int rc, src_len; |
| 338 | |
| 339 | PJ_FD_ZERO(&rset); |
| 340 | PJ_FD_SET(srv->sock, &rset); |
| 341 | |
| 342 | rc = pj_sock_select((int)(srv->sock+1), &rset, NULL, NULL, &timeout); |
| 343 | if (rc != 1) |
| 344 | continue; |
| 345 | |
| 346 | src_len = sizeof(src_addr); |
| 347 | pkt_len = sizeof(pkt); |
| 348 | rc = pj_sock_recvfrom(srv->sock, pkt, &pkt_len, 0, |
| 349 | &src_addr, &src_len); |
| 350 | if (rc != 0) { |
| 351 | app_perror("Server error receiving packet", rc); |
| 352 | continue; |
| 353 | } |
| 354 | |
| 355 | PJ_LOG(5,(THIS_FILE, "Server %d processing packet", srv - &g_server[0])); |
| 356 | srv->pkt_count++; |
| 357 | |
| 358 | rc = pj_dns_parse_packet(pool, pkt, (unsigned)pkt_len, &req); |
| 359 | if (rc != PJ_SUCCESS) { |
| 360 | app_perror("server error parsing packet", rc); |
| 361 | continue; |
| 362 | } |
| 363 | |
| 364 | /* Verify packet */ |
| 365 | pj_assert(req->hdr.qdcount == 1); |
| 366 | pj_assert(req->q[0].dnsclass == 1); |
| 367 | |
| 368 | /* Simulate network RTT */ |
| 369 | pj_thread_sleep(50); |
| 370 | |
| 371 | if (srv->action == ACTION_IGNORE) { |
| 372 | continue; |
| 373 | } else if (srv->action == ACTION_REPLY) { |
| 374 | srv->resp.hdr.id = req->hdr.id; |
| 375 | pkt_len = print_packet(&srv->resp, (pj_uint8_t*)pkt, sizeof(pkt)); |
| 376 | pj_sock_sendto(srv->sock, pkt, &pkt_len, 0, &src_addr, src_len); |
| 377 | } else if (srv->action == ACTION_CB) { |
| 378 | pj_dns_parsed_packet *resp; |
| 379 | (*srv->action_cb)(req, &resp); |
| 380 | resp->hdr.id = req->hdr.id; |
| 381 | pkt_len = print_packet(resp, (pj_uint8_t*)pkt, sizeof(pkt)); |
| 382 | pj_sock_sendto(srv->sock, pkt, &pkt_len, 0, &src_addr, src_len); |
| 383 | } else if (srv->action > 0) { |
| 384 | req->hdr.flags |= PJ_DNS_SET_RCODE(srv->action); |
| 385 | pkt_len = print_packet(req, (pj_uint8_t*)pkt, sizeof(pkt)); |
| 386 | pj_sock_sendto(srv->sock, pkt, &pkt_len, 0, &src_addr, src_len); |
| 387 | } |
| 388 | } |
| 389 | |
| 390 | return 0; |
| 391 | } |
| 392 | |
| 393 | static int poll_worker_thread(void *p) |
| 394 | { |
| 395 | PJ_UNUSED_ARG(p); |
| 396 | |
| 397 | while (!thread_quit) { |
| 398 | pj_time_val delay = {0, 100}; |
| 399 | pj_timer_heap_poll(timer_heap, NULL); |
| 400 | pj_ioqueue_poll(ioqueue, &delay); |
| 401 | } |
| 402 | |
| 403 | return 0; |
| 404 | } |
| 405 | |
| 406 | static void destroy(void); |
| 407 | |
| 408 | static int init(void) |
| 409 | { |
| 410 | pj_status_t status; |
| 411 | pj_str_t nameservers[2]; |
| 412 | pj_uint16_t ports[2]; |
| 413 | int i; |
| 414 | |
| 415 | nameservers[0] = pj_str("127.0.0.1"); |
| 416 | ports[0] = 5553; |
| 417 | nameservers[1] = pj_str("127.0.0.1"); |
| 418 | ports[1] = 5554; |
| 419 | |
| 420 | g_server[0].port = ports[0]; |
| 421 | g_server[1].port = ports[1]; |
| 422 | |
| 423 | pool = pj_pool_create(mem, NULL, 2000, 2000, NULL); |
| 424 | |
| 425 | status = pj_sem_create(pool, NULL, 0, 2, &sem); |
| 426 | pj_assert(status == PJ_SUCCESS); |
| 427 | |
| 428 | for (i=0; i<2; ++i) { |
| 429 | pj_sockaddr_in addr; |
| 430 | |
| 431 | status = pj_sock_socket(pj_AF_INET(), pj_SOCK_DGRAM(), 0, &g_server[i].sock); |
| 432 | if (status != PJ_SUCCESS) |
| 433 | return -10; |
| 434 | |
| 435 | pj_sockaddr_in_init(&addr, NULL, (pj_uint16_t)g_server[i].port); |
| 436 | |
| 437 | status = pj_sock_bind(g_server[i].sock, &addr, sizeof(addr)); |
| 438 | if (status != PJ_SUCCESS) |
| 439 | return -20; |
| 440 | |
| 441 | status = pj_thread_create(pool, NULL, &server_thread, &g_server[i], |
| 442 | 0, 0, &g_server[i].thread); |
| 443 | if (status != PJ_SUCCESS) |
| 444 | return -30; |
| 445 | } |
| 446 | |
| 447 | status = pj_timer_heap_create(pool, 16, &timer_heap); |
| 448 | pj_assert(status == PJ_SUCCESS); |
| 449 | |
| 450 | status = pj_ioqueue_create(pool, 16, &ioqueue); |
| 451 | pj_assert(status == PJ_SUCCESS); |
| 452 | |
| 453 | status = pj_dns_resolver_create(mem, NULL, 0, timer_heap, ioqueue, &resolver); |
| 454 | if (status != PJ_SUCCESS) |
| 455 | return -40; |
| 456 | |
| 457 | pj_dns_resolver_get_settings(resolver, &set); |
| 458 | set.good_ns_ttl = 20; |
| 459 | set.bad_ns_ttl = 20; |
| 460 | pj_dns_resolver_set_settings(resolver, &set); |
| 461 | |
| 462 | status = pj_dns_resolver_set_ns(resolver, 2, nameservers, ports); |
| 463 | pj_assert(status == PJ_SUCCESS); |
| 464 | |
| 465 | status = pj_thread_create(pool, NULL, &poll_worker_thread, NULL, 0, 0, &poll_thread); |
| 466 | pj_assert(status == PJ_SUCCESS); |
| 467 | |
| 468 | return 0; |
| 469 | } |
| 470 | |
| 471 | |
| 472 | static void destroy(void) |
| 473 | { |
| 474 | int i; |
| 475 | |
| 476 | thread_quit = PJ_TRUE; |
| 477 | |
| 478 | for (i=0; i<2; ++i) { |
| 479 | pj_thread_join(g_server[i].thread); |
| 480 | pj_sock_close(g_server[i].sock); |
| 481 | } |
| 482 | |
| 483 | pj_thread_join(poll_thread); |
| 484 | |
| 485 | pj_dns_resolver_destroy(resolver, PJ_FALSE); |
| 486 | pj_ioqueue_destroy(ioqueue); |
| 487 | pj_timer_heap_destroy(timer_heap); |
| 488 | |
| 489 | pj_sem_destroy(sem); |
| 490 | pj_pool_release(pool); |
| 491 | } |
| 492 | |
| 493 | |
| 494 | //////////////////////////////////////////////////////////////////////////// |
| 495 | /* DNS A parser tests */ |
| 496 | static int a_parser_test(void) |
| 497 | { |
| 498 | pj_dns_parsed_packet pkt; |
| 499 | pj_dns_a_record rec; |
| 500 | pj_status_t rc; |
| 501 | |
| 502 | PJ_LOG(3,(THIS_FILE, " DNS A record parser tests")); |
| 503 | |
| 504 | pkt.q = PJ_POOL_ZALLOC_T(pool, pj_dns_parsed_query); |
| 505 | pkt.ans = (pj_dns_parsed_rr*) |
| 506 | pj_pool_calloc(pool, 32, sizeof(pj_dns_parsed_rr)); |
| 507 | |
| 508 | /* Simple answer with direct A record, but with addition of |
| 509 | * a CNAME and another A to confuse the parser. |
| 510 | */ |
| 511 | PJ_LOG(3,(THIS_FILE, " A RR with duplicate CNAME/A")); |
| 512 | pkt.hdr.flags = 0; |
| 513 | pkt.hdr.qdcount = 1; |
| 514 | pkt.q[0].type = PJ_DNS_TYPE_A; |
| 515 | pkt.q[0].dnsclass = 1; |
| 516 | pkt.q[0].name = pj_str("ahost"); |
| 517 | pkt.hdr.anscount = 3; |
| 518 | |
| 519 | /* This is the RR corresponding to the query */ |
| 520 | pkt.ans[0].name = pj_str("ahost"); |
| 521 | pkt.ans[0].type = PJ_DNS_TYPE_A; |
| 522 | pkt.ans[0].dnsclass = 1; |
| 523 | pkt.ans[0].ttl = 1; |
| 524 | pkt.ans[0].rdata.a.ip_addr.s_addr = 0x01020304; |
| 525 | |
| 526 | /* CNAME to confuse the parser */ |
| 527 | pkt.ans[1].name = pj_str("ahost"); |
| 528 | pkt.ans[1].type = PJ_DNS_TYPE_CNAME; |
| 529 | pkt.ans[1].dnsclass = 1; |
| 530 | pkt.ans[1].ttl = 1; |
| 531 | pkt.ans[1].rdata.cname.name = pj_str("bhost"); |
| 532 | |
| 533 | /* DNS A RR to confuse the parser */ |
| 534 | pkt.ans[2].name = pj_str("bhost"); |
| 535 | pkt.ans[2].type = PJ_DNS_TYPE_A; |
| 536 | pkt.ans[2].dnsclass = 1; |
| 537 | pkt.ans[2].ttl = 1; |
| 538 | pkt.ans[2].rdata.a.ip_addr.s_addr = 0x0203; |
| 539 | |
| 540 | |
| 541 | rc = pj_dns_parse_a_response(&pkt, &rec); |
| 542 | pj_assert(rc == PJ_SUCCESS); |
| 543 | pj_assert(pj_strcmp2(&rec.name, "ahost")==0); |
| 544 | pj_assert(rec.alias.slen == 0); |
| 545 | pj_assert(rec.addr_count == 1); |
| 546 | pj_assert(rec.addr[0].s_addr == 0x01020304); |
| 547 | |
| 548 | /* Answer with the target corresponds to a CNAME entry, but not |
| 549 | * as the first record, and with additions of some CNAME and A |
| 550 | * entries to confuse the parser. |
| 551 | */ |
| 552 | PJ_LOG(3,(THIS_FILE, " CNAME RR with duplicate CNAME/A")); |
| 553 | pkt.hdr.flags = 0; |
| 554 | pkt.hdr.qdcount = 1; |
| 555 | pkt.q[0].type = PJ_DNS_TYPE_A; |
| 556 | pkt.q[0].dnsclass = 1; |
| 557 | pkt.q[0].name = pj_str("ahost"); |
| 558 | pkt.hdr.anscount = 4; |
| 559 | |
| 560 | /* This is the DNS A record for the alias */ |
| 561 | pkt.ans[0].name = pj_str("ahostalias"); |
| 562 | pkt.ans[0].type = PJ_DNS_TYPE_A; |
| 563 | pkt.ans[0].dnsclass = 1; |
| 564 | pkt.ans[0].ttl = 1; |
| 565 | pkt.ans[0].rdata.a.ip_addr.s_addr = 0x02020202; |
| 566 | |
| 567 | /* CNAME entry corresponding to the query */ |
| 568 | pkt.ans[1].name = pj_str("ahost"); |
| 569 | pkt.ans[1].type = PJ_DNS_TYPE_CNAME; |
| 570 | pkt.ans[1].dnsclass = 1; |
| 571 | pkt.ans[1].ttl = 1; |
| 572 | pkt.ans[1].rdata.cname.name = pj_str("ahostalias"); |
| 573 | |
| 574 | /* Another CNAME to confuse the parser */ |
| 575 | pkt.ans[2].name = pj_str("ahost"); |
| 576 | pkt.ans[2].type = PJ_DNS_TYPE_CNAME; |
| 577 | pkt.ans[2].dnsclass = 1; |
| 578 | pkt.ans[2].ttl = 1; |
| 579 | pkt.ans[2].rdata.cname.name = pj_str("ahostalias2"); |
| 580 | |
| 581 | /* Another DNS A to confuse the parser */ |
| 582 | pkt.ans[3].name = pj_str("ahostalias2"); |
| 583 | pkt.ans[3].type = PJ_DNS_TYPE_A; |
| 584 | pkt.ans[3].dnsclass = 1; |
| 585 | pkt.ans[3].ttl = 1; |
| 586 | pkt.ans[3].rdata.a.ip_addr.s_addr = 0x03030303; |
| 587 | |
| 588 | rc = pj_dns_parse_a_response(&pkt, &rec); |
| 589 | pj_assert(rc == PJ_SUCCESS); |
| 590 | pj_assert(pj_strcmp2(&rec.name, "ahost")==0); |
| 591 | pj_assert(pj_strcmp2(&rec.alias, "ahostalias")==0); |
| 592 | pj_assert(rec.addr_count == 1); |
| 593 | pj_assert(rec.addr[0].s_addr == 0x02020202); |
| 594 | |
| 595 | /* |
| 596 | * No query section. |
| 597 | */ |
| 598 | PJ_LOG(3,(THIS_FILE, " No query section")); |
| 599 | pkt.hdr.qdcount = 0; |
| 600 | pkt.hdr.anscount = 0; |
| 601 | |
| 602 | rc = pj_dns_parse_a_response(&pkt, &rec); |
| 603 | pj_assert(rc == PJLIB_UTIL_EDNSINANSWER); |
| 604 | |
| 605 | /* |
| 606 | * No answer section. |
| 607 | */ |
| 608 | PJ_LOG(3,(THIS_FILE, " No answer section")); |
| 609 | pkt.hdr.flags = 0; |
| 610 | pkt.hdr.qdcount = 1; |
| 611 | pkt.q[0].type = PJ_DNS_TYPE_A; |
| 612 | pkt.q[0].dnsclass = 1; |
| 613 | pkt.q[0].name = pj_str("ahost"); |
| 614 | pkt.hdr.anscount = 0; |
| 615 | |
| 616 | rc = pj_dns_parse_a_response(&pkt, &rec); |
| 617 | pj_assert(rc == PJLIB_UTIL_EDNSNOANSWERREC); |
| 618 | |
| 619 | /* |
| 620 | * Answer doesn't match query. |
| 621 | */ |
| 622 | PJ_LOG(3,(THIS_FILE, " Answer doesn't match query")); |
| 623 | pkt.hdr.flags = 0; |
| 624 | pkt.hdr.qdcount = 1; |
| 625 | pkt.q[0].type = PJ_DNS_TYPE_A; |
| 626 | pkt.q[0].dnsclass = 1; |
| 627 | pkt.q[0].name = pj_str("ahost"); |
| 628 | pkt.hdr.anscount = 1; |
| 629 | |
| 630 | /* An answer that doesn't match the query */ |
| 631 | pkt.ans[0].name = pj_str("ahostalias"); |
| 632 | pkt.ans[0].type = PJ_DNS_TYPE_A; |
| 633 | pkt.ans[0].dnsclass = 1; |
| 634 | pkt.ans[0].ttl = 1; |
| 635 | pkt.ans[0].rdata.a.ip_addr.s_addr = 0x02020202; |
| 636 | |
| 637 | rc = pj_dns_parse_a_response(&pkt, &rec); |
| 638 | pj_assert(rc == PJLIB_UTIL_EDNSNOANSWERREC); |
| 639 | |
| 640 | |
| 641 | /* |
| 642 | * DNS CNAME that doesn't have corresponding DNS A. |
| 643 | */ |
| 644 | PJ_LOG(3,(THIS_FILE, " CNAME with no matching DNS A RR (1)")); |
| 645 | pkt.hdr.flags = 0; |
| 646 | pkt.hdr.qdcount = 1; |
| 647 | pkt.q[0].type = PJ_DNS_TYPE_A; |
| 648 | pkt.q[0].dnsclass = 1; |
| 649 | pkt.q[0].name = pj_str("ahost"); |
| 650 | pkt.hdr.anscount = 1; |
| 651 | |
| 652 | /* The CNAME */ |
| 653 | pkt.ans[0].name = pj_str("ahost"); |
| 654 | pkt.ans[0].type = PJ_DNS_TYPE_CNAME; |
| 655 | pkt.ans[0].dnsclass = 1; |
| 656 | pkt.ans[0].ttl = 1; |
| 657 | pkt.ans[0].rdata.cname.name = pj_str("ahostalias"); |
| 658 | |
| 659 | rc = pj_dns_parse_a_response(&pkt, &rec); |
| 660 | pj_assert(rc == PJLIB_UTIL_EDNSNOANSWERREC); |
| 661 | |
| 662 | |
| 663 | /* |
| 664 | * DNS CNAME that doesn't have corresponding DNS A. |
| 665 | */ |
| 666 | PJ_LOG(3,(THIS_FILE, " CNAME with no matching DNS A RR (2)")); |
| 667 | pkt.hdr.flags = 0; |
| 668 | pkt.hdr.qdcount = 1; |
| 669 | pkt.q[0].type = PJ_DNS_TYPE_A; |
| 670 | pkt.q[0].dnsclass = 1; |
| 671 | pkt.q[0].name = pj_str("ahost"); |
| 672 | pkt.hdr.anscount = 2; |
| 673 | |
| 674 | /* The CNAME */ |
| 675 | pkt.ans[0].name = pj_str("ahost"); |
| 676 | pkt.ans[0].type = PJ_DNS_TYPE_CNAME; |
| 677 | pkt.ans[0].dnsclass = 1; |
| 678 | pkt.ans[0].ttl = 1; |
| 679 | pkt.ans[0].rdata.cname.name = pj_str("ahostalias"); |
| 680 | |
| 681 | /* DNS A record, but the name doesn't match */ |
| 682 | pkt.ans[1].name = pj_str("ahost"); |
| 683 | pkt.ans[1].type = PJ_DNS_TYPE_A; |
| 684 | pkt.ans[1].dnsclass = 1; |
| 685 | pkt.ans[1].ttl = 1; |
| 686 | pkt.ans[1].rdata.a.ip_addr.s_addr = 0x01020304; |
| 687 | |
| 688 | rc = pj_dns_parse_a_response(&pkt, &rec); |
| 689 | pj_assert(rc == PJLIB_UTIL_EDNSNOANSWERREC); |
| 690 | |
| 691 | return 0; |
| 692 | } |
| 693 | |
| 694 | |
| 695 | //////////////////////////////////////////////////////////////////////////// |
| 696 | /* Simple DNS test */ |
| 697 | #define IP_ADDR0 0x00010203 |
| 698 | |
| 699 | static void dns_callback(void *user_data, |
| 700 | pj_status_t status, |
| 701 | pj_dns_parsed_packet *resp) |
| 702 | { |
| 703 | PJ_UNUSED_ARG(user_data); |
| 704 | |
| 705 | pj_sem_post(sem); |
| 706 | |
| 707 | PJ_ASSERT_ON_FAIL(status == PJ_SUCCESS, return); |
| 708 | PJ_ASSERT_ON_FAIL(resp, return); |
| 709 | PJ_ASSERT_ON_FAIL(resp->hdr.anscount == 1, return); |
| 710 | PJ_ASSERT_ON_FAIL(resp->ans[0].type == PJ_DNS_TYPE_A, return); |
| 711 | PJ_ASSERT_ON_FAIL(resp->ans[0].rdata.a.ip_addr.s_addr == IP_ADDR0, return); |
| 712 | |
| 713 | } |
| 714 | |
| 715 | |
| 716 | static int simple_test(void) |
| 717 | { |
| 718 | pj_str_t name = pj_str("helloworld"); |
| 719 | pj_dns_parsed_packet *r; |
| 720 | pj_status_t status; |
| 721 | |
| 722 | PJ_LOG(3,(THIS_FILE, " simple successful test")); |
| 723 | |
| 724 | g_server[0].pkt_count = 0; |
| 725 | g_server[1].pkt_count = 0; |
| 726 | |
| 727 | g_server[0].action = ACTION_REPLY; |
| 728 | r = &g_server[0].resp; |
| 729 | r->hdr.qdcount = 1; |
| 730 | r->hdr.anscount = 1; |
| 731 | r->q = PJ_POOL_ZALLOC_T(pool, pj_dns_parsed_query); |
| 732 | r->q[0].type = PJ_DNS_TYPE_A; |
| 733 | r->q[0].dnsclass = 1; |
| 734 | r->q[0].name = name; |
| 735 | r->ans = PJ_POOL_ZALLOC_T(pool, pj_dns_parsed_rr); |
| 736 | r->ans[0].type = PJ_DNS_TYPE_A; |
| 737 | r->ans[0].dnsclass = 1; |
| 738 | r->ans[0].name = name; |
| 739 | r->ans[0].rdata.a.ip_addr.s_addr = IP_ADDR0; |
| 740 | |
| 741 | g_server[1].action = ACTION_REPLY; |
| 742 | r = &g_server[1].resp; |
| 743 | r->hdr.qdcount = 1; |
| 744 | r->hdr.anscount = 1; |
| 745 | r->q = PJ_POOL_ZALLOC_T(pool, pj_dns_parsed_query); |
| 746 | r->q[0].type = PJ_DNS_TYPE_A; |
| 747 | r->q[0].dnsclass = 1; |
| 748 | r->q[0].name = name; |
| 749 | r->ans = PJ_POOL_ZALLOC_T(pool, pj_dns_parsed_rr); |
| 750 | r->ans[0].type = PJ_DNS_TYPE_A; |
| 751 | r->ans[0].dnsclass = 1; |
| 752 | r->ans[0].name = name; |
| 753 | r->ans[0].rdata.a.ip_addr.s_addr = IP_ADDR0; |
| 754 | |
| 755 | status = pj_dns_resolver_start_query(resolver, &name, PJ_DNS_TYPE_A, 0, |
| 756 | &dns_callback, NULL, NULL); |
| 757 | if (status != PJ_SUCCESS) |
| 758 | return -1000; |
| 759 | |
| 760 | pj_sem_wait(sem); |
| 761 | pj_thread_sleep(1000); |
| 762 | |
| 763 | |
| 764 | /* Both servers must get packet */ |
| 765 | pj_assert(g_server[0].pkt_count == 1); |
| 766 | pj_assert(g_server[1].pkt_count == 1); |
| 767 | |
| 768 | return 0; |
| 769 | } |
| 770 | |
| 771 | |
| 772 | //////////////////////////////////////////////////////////////////////////// |
| 773 | /* DNS nameserver fail-over test */ |
| 774 | |
| 775 | static void dns_callback_1b(void *user_data, |
| 776 | pj_status_t status, |
| 777 | pj_dns_parsed_packet *resp) |
| 778 | { |
| 779 | PJ_UNUSED_ARG(user_data); |
| 780 | PJ_UNUSED_ARG(resp); |
| 781 | |
| 782 | pj_sem_post(sem); |
| 783 | |
| 784 | PJ_ASSERT_ON_FAIL(status==PJ_STATUS_FROM_DNS_RCODE(PJ_DNS_RCODE_NXDOMAIN), |
| 785 | return); |
| 786 | } |
| 787 | |
| 788 | |
| 789 | |
| 790 | |
| 791 | /* DNS test */ |
| 792 | static int dns_test(void) |
| 793 | { |
| 794 | pj_str_t name = pj_str("name00"); |
| 795 | pj_status_t status; |
| 796 | |
| 797 | PJ_LOG(3,(THIS_FILE, " simple error response test")); |
| 798 | |
| 799 | g_server[0].pkt_count = 0; |
| 800 | g_server[1].pkt_count = 0; |
| 801 | |
| 802 | g_server[0].action = PJ_DNS_RCODE_NXDOMAIN; |
| 803 | g_server[1].action = PJ_DNS_RCODE_NXDOMAIN; |
| 804 | |
| 805 | status = pj_dns_resolver_start_query(resolver, &name, PJ_DNS_TYPE_A, 0, |
| 806 | &dns_callback_1b, NULL, NULL); |
| 807 | if (status != PJ_SUCCESS) |
| 808 | return -1000; |
| 809 | |
| 810 | pj_sem_wait(sem); |
| 811 | pj_thread_sleep(1000); |
| 812 | |
| 813 | /* Now only server 0 should get packet, since both servers are |
| 814 | * in STATE_ACTIVE state |
| 815 | */ |
| 816 | pj_assert((g_server[0].pkt_count == 1 && g_server[1].pkt_count == 0) || |
| 817 | (g_server[1].pkt_count == 1 && g_server[0].pkt_count == 0)); |
| 818 | |
| 819 | /* Wait to allow probing period to complete */ |
| 820 | PJ_LOG(3,(THIS_FILE, " waiting for active NS to expire (%d sec)", |
| 821 | set.good_ns_ttl)); |
| 822 | pj_thread_sleep(set.good_ns_ttl * 1000); |
| 823 | |
| 824 | /* |
| 825 | * Fail-over test |
| 826 | */ |
| 827 | PJ_LOG(3,(THIS_FILE, " failing server0")); |
| 828 | g_server[0].action = ACTION_IGNORE; |
| 829 | g_server[1].action = PJ_DNS_RCODE_NXDOMAIN; |
| 830 | |
| 831 | g_server[0].pkt_count = 0; |
| 832 | g_server[1].pkt_count = 0; |
| 833 | |
| 834 | name = pj_str("name01"); |
| 835 | status = pj_dns_resolver_start_query(resolver, &name, PJ_DNS_TYPE_A, 0, |
| 836 | &dns_callback_1b, NULL, NULL); |
| 837 | if (status != PJ_SUCCESS) |
| 838 | return -1000; |
| 839 | |
| 840 | pj_sem_wait(sem); |
| 841 | |
| 842 | /* |
| 843 | * Check that both servers still receive requests, since they are |
| 844 | * in probing state. |
| 845 | */ |
| 846 | PJ_LOG(3,(THIS_FILE, " checking both NS during probing period")); |
| 847 | g_server[0].action = ACTION_IGNORE; |
| 848 | g_server[1].action = PJ_DNS_RCODE_NXDOMAIN; |
| 849 | |
| 850 | g_server[0].pkt_count = 0; |
| 851 | g_server[1].pkt_count = 0; |
| 852 | |
| 853 | name = pj_str("name02"); |
| 854 | status = pj_dns_resolver_start_query(resolver, &name, PJ_DNS_TYPE_A, 0, |
| 855 | &dns_callback_1b, NULL, NULL); |
| 856 | if (status != PJ_SUCCESS) |
| 857 | return -1000; |
| 858 | |
| 859 | pj_sem_wait(sem); |
| 860 | pj_thread_sleep(set.qretr_delay * set.qretr_count); |
| 861 | |
| 862 | /* Both servers must get requests */ |
| 863 | pj_assert(g_server[0].pkt_count >= 1); |
| 864 | pj_assert(g_server[1].pkt_count == 1); |
| 865 | |
| 866 | /* Wait to allow probing period to complete */ |
| 867 | PJ_LOG(3,(THIS_FILE, " waiting for probing state to end (%d sec)", |
| 868 | set.qretr_delay * |
| 869 | (set.qretr_count+2) / 1000)); |
| 870 | pj_thread_sleep(set.qretr_delay * (set.qretr_count + 2)); |
| 871 | |
| 872 | |
| 873 | /* |
| 874 | * Now only server 1 should get requests. |
| 875 | */ |
| 876 | PJ_LOG(3,(THIS_FILE, " verifying only good NS is used")); |
| 877 | g_server[0].action = PJ_DNS_RCODE_NXDOMAIN; |
| 878 | g_server[1].action = PJ_DNS_RCODE_NXDOMAIN; |
| 879 | |
| 880 | g_server[0].pkt_count = 0; |
| 881 | g_server[1].pkt_count = 0; |
| 882 | |
| 883 | name = pj_str("name03"); |
| 884 | status = pj_dns_resolver_start_query(resolver, &name, PJ_DNS_TYPE_A, 0, |
| 885 | &dns_callback_1b, NULL, NULL); |
| 886 | if (status != PJ_SUCCESS) |
| 887 | return -1000; |
| 888 | |
| 889 | pj_sem_wait(sem); |
| 890 | pj_thread_sleep(1000); |
| 891 | |
| 892 | /* Both servers must get requests */ |
| 893 | pj_assert(g_server[0].pkt_count == 0); |
| 894 | pj_assert(g_server[1].pkt_count == 1); |
| 895 | |
| 896 | /* Wait to allow probing period to complete */ |
| 897 | PJ_LOG(3,(THIS_FILE, " waiting for active NS to expire (%d sec)", |
| 898 | set.good_ns_ttl)); |
| 899 | pj_thread_sleep(set.good_ns_ttl * 1000); |
| 900 | |
| 901 | /* |
| 902 | * Now fail server 1 to switch to server 0 |
| 903 | */ |
| 904 | g_server[0].action = PJ_DNS_RCODE_NXDOMAIN; |
| 905 | g_server[1].action = ACTION_IGNORE; |
| 906 | |
| 907 | g_server[0].pkt_count = 0; |
| 908 | g_server[1].pkt_count = 0; |
| 909 | |
| 910 | name = pj_str("name04"); |
| 911 | status = pj_dns_resolver_start_query(resolver, &name, PJ_DNS_TYPE_A, 0, |
| 912 | &dns_callback_1b, NULL, NULL); |
| 913 | if (status != PJ_SUCCESS) |
| 914 | return -1000; |
| 915 | |
| 916 | pj_sem_wait(sem); |
| 917 | |
| 918 | /* Wait to allow probing period to complete */ |
| 919 | PJ_LOG(3,(THIS_FILE, " waiting for probing state (%d sec)", |
| 920 | set.qretr_delay * (set.qretr_count+2) / 1000)); |
| 921 | pj_thread_sleep(set.qretr_delay * (set.qretr_count + 2)); |
| 922 | |
| 923 | /* |
| 924 | * Now only server 0 should get requests. |
| 925 | */ |
| 926 | PJ_LOG(3,(THIS_FILE, " verifying good NS")); |
| 927 | g_server[0].action = PJ_DNS_RCODE_NXDOMAIN; |
| 928 | g_server[1].action = ACTION_IGNORE; |
| 929 | |
| 930 | g_server[0].pkt_count = 0; |
| 931 | g_server[1].pkt_count = 0; |
| 932 | |
| 933 | name = pj_str("name05"); |
| 934 | status = pj_dns_resolver_start_query(resolver, &name, PJ_DNS_TYPE_A, 0, |
| 935 | &dns_callback_1b, NULL, NULL); |
| 936 | if (status != PJ_SUCCESS) |
| 937 | return -1000; |
| 938 | |
| 939 | pj_sem_wait(sem); |
| 940 | pj_thread_sleep(1000); |
| 941 | |
| 942 | /* Only good NS should get request */ |
| 943 | pj_assert(g_server[0].pkt_count == 1); |
| 944 | pj_assert(g_server[1].pkt_count == 0); |
| 945 | |
| 946 | |
| 947 | return 0; |
| 948 | } |
| 949 | |
| 950 | |
| 951 | //////////////////////////////////////////////////////////////////////////// |
| 952 | /* Resolver test, normal, with CNAME */ |
| 953 | #define IP_ADDR1 0x02030405 |
| 954 | #define PORT1 50061 |
| 955 | |
| 956 | static void action1_1(const pj_dns_parsed_packet *pkt, |
| 957 | pj_dns_parsed_packet **p_res) |
| 958 | { |
| 959 | pj_dns_parsed_packet *res; |
| 960 | char *target = "sip.somedomain.com"; |
| 961 | |
| 962 | res = PJ_POOL_ZALLOC_T(pool, pj_dns_parsed_packet); |
| 963 | |
| 964 | if (res->q == NULL) { |
| 965 | res->q = PJ_POOL_ZALLOC_T(pool, pj_dns_parsed_query); |
| 966 | } |
| 967 | if (res->ans == NULL) { |
| 968 | res->ans = (pj_dns_parsed_rr*) |
| 969 | pj_pool_calloc(pool, 4, sizeof(pj_dns_parsed_rr)); |
| 970 | } |
| 971 | |
| 972 | res->hdr.qdcount = 1; |
| 973 | res->q[0].type = pkt->q[0].type; |
| 974 | res->q[0].dnsclass = pkt->q[0].dnsclass; |
| 975 | res->q[0].name = pkt->q[0].name; |
| 976 | |
| 977 | if (pkt->q[0].type == PJ_DNS_TYPE_SRV) { |
| 978 | |
| 979 | pj_assert(pj_strcmp2(&pkt->q[0].name, "_sip._udp.somedomain.com")==0); |
| 980 | |
| 981 | res->hdr.anscount = 1; |
| 982 | res->ans[0].type = PJ_DNS_TYPE_SRV; |
| 983 | res->ans[0].dnsclass = 1; |
| 984 | res->ans[0].name = res->q[0].name; |
| 985 | res->ans[0].ttl = 1; |
| 986 | res->ans[0].rdata.srv.prio = 1; |
| 987 | res->ans[0].rdata.srv.weight = 2; |
| 988 | res->ans[0].rdata.srv.port = PORT1; |
| 989 | res->ans[0].rdata.srv.target = pj_str(target); |
| 990 | |
| 991 | } else if (pkt->q[0].type == PJ_DNS_TYPE_A) { |
| 992 | char *alias = "sipalias.somedomain.com"; |
| 993 | |
| 994 | pj_assert(pj_strcmp2(&res->q[0].name, target)==0); |
| 995 | |
| 996 | res->hdr.anscount = 2; |
| 997 | res->ans[0].type = PJ_DNS_TYPE_CNAME; |
| 998 | res->ans[0].dnsclass = 1; |
| 999 | res->ans[0].ttl = 1000; /* resolver should select minimum TTL */ |
| 1000 | res->ans[0].name = res->q[0].name; |
| 1001 | res->ans[0].rdata.cname.name = pj_str(alias); |
| 1002 | |
| 1003 | res->ans[1].type = PJ_DNS_TYPE_A; |
| 1004 | res->ans[1].dnsclass = 1; |
| 1005 | res->ans[1].ttl = 1; |
| 1006 | res->ans[1].name = pj_str(alias); |
| 1007 | res->ans[1].rdata.a.ip_addr.s_addr = IP_ADDR1; |
| 1008 | } |
| 1009 | |
| 1010 | *p_res = res; |
| 1011 | } |
| 1012 | |
| 1013 | static void srv_cb_1(void *user_data, |
| 1014 | pj_status_t status, |
| 1015 | const pj_dns_srv_record *rec) |
| 1016 | { |
| 1017 | PJ_UNUSED_ARG(user_data); |
| 1018 | |
| 1019 | pj_sem_post(sem); |
| 1020 | |
| 1021 | PJ_ASSERT_ON_FAIL(status == PJ_SUCCESS, return); |
| 1022 | PJ_ASSERT_ON_FAIL(rec->count == 1, return); |
| 1023 | PJ_ASSERT_ON_FAIL(rec->entry[0].priority == 1, return); |
| 1024 | PJ_ASSERT_ON_FAIL(rec->entry[0].weight == 2, return); |
| 1025 | PJ_ASSERT_ON_FAIL(pj_strcmp2(&rec->entry[0].server.name, "sip.somedomain.com")==0, |
| 1026 | return); |
| 1027 | PJ_ASSERT_ON_FAIL(pj_strcmp2(&rec->entry[0].server.alias, "sipalias.somedomain.com")==0, |
| 1028 | return); |
| 1029 | PJ_ASSERT_ON_FAIL(rec->entry[0].server.addr[0].s_addr == IP_ADDR1, return); |
| 1030 | PJ_ASSERT_ON_FAIL(rec->entry[0].port == PORT1, return); |
| 1031 | |
| 1032 | |
| 1033 | } |
| 1034 | |
| 1035 | static void srv_cb_1b(void *user_data, |
| 1036 | pj_status_t status, |
| 1037 | const pj_dns_srv_record *rec) |
| 1038 | { |
| 1039 | PJ_UNUSED_ARG(user_data); |
| 1040 | |
| 1041 | pj_sem_post(sem); |
| 1042 | |
| 1043 | PJ_ASSERT_ON_FAIL(status==PJ_STATUS_FROM_DNS_RCODE(PJ_DNS_RCODE_NXDOMAIN), |
| 1044 | return); |
| 1045 | PJ_ASSERT_ON_FAIL(rec->count == 0, return); |
| 1046 | } |
| 1047 | |
| 1048 | static int srv_resolver_test(void) |
| 1049 | { |
| 1050 | pj_status_t status; |
| 1051 | pj_str_t domain = pj_str("somedomain.com"); |
| 1052 | pj_str_t res_name = pj_str("_sip._udp."); |
| 1053 | |
| 1054 | /* Successful scenario */ |
| 1055 | PJ_LOG(3,(THIS_FILE, " srv_resolve(): success scenario")); |
| 1056 | |
| 1057 | g_server[0].action = ACTION_CB; |
| 1058 | g_server[0].action_cb = &action1_1; |
| 1059 | g_server[1].action = ACTION_CB; |
| 1060 | g_server[1].action_cb = &action1_1; |
| 1061 | |
| 1062 | g_server[0].pkt_count = 0; |
| 1063 | g_server[1].pkt_count = 0; |
| 1064 | |
| 1065 | status = pj_dns_srv_resolve(&domain, &res_name, 5061, pool, resolver, PJ_TRUE, |
| 1066 | NULL, &srv_cb_1, NULL); |
| 1067 | pj_assert(status == PJ_SUCCESS); |
| 1068 | |
| 1069 | pj_sem_wait(sem); |
| 1070 | |
| 1071 | /* Because of previous tests, only NS 1 should get the request */ |
| 1072 | pj_assert(g_server[0].pkt_count == 2); /* 2 because of SRV and A resolution */ |
| 1073 | pj_assert(g_server[1].pkt_count == 0); |
| 1074 | |
| 1075 | |
| 1076 | /* Wait until cache expires and nameserver state moves out from STATE_PROBING */ |
| 1077 | PJ_LOG(3,(THIS_FILE, " waiting for cache to expire (~15 secs)..")); |
| 1078 | pj_thread_sleep(1000 + |
| 1079 | ((set.qretr_count + 2) * set.qretr_delay)); |
| 1080 | |
| 1081 | /* Successful scenario */ |
| 1082 | PJ_LOG(3,(THIS_FILE, " srv_resolve(): parallel queries")); |
| 1083 | g_server[0].pkt_count = 0; |
| 1084 | g_server[1].pkt_count = 0; |
| 1085 | |
| 1086 | status = pj_dns_srv_resolve(&domain, &res_name, 5061, pool, resolver, PJ_TRUE, |
| 1087 | NULL, &srv_cb_1, NULL); |
| 1088 | pj_assert(status == PJ_SUCCESS); |
| 1089 | |
| 1090 | |
| 1091 | status = pj_dns_srv_resolve(&domain, &res_name, 5061, pool, resolver, PJ_TRUE, |
| 1092 | NULL, &srv_cb_1, NULL); |
| 1093 | pj_assert(status == PJ_SUCCESS); |
| 1094 | |
| 1095 | pj_sem_wait(sem); |
| 1096 | pj_sem_wait(sem); |
| 1097 | |
| 1098 | /* Only server one should get a query */ |
| 1099 | pj_assert(g_server[0].pkt_count == 2); /* 2 because of SRV and A resolution */ |
| 1100 | pj_assert(g_server[1].pkt_count == 0); |
| 1101 | |
| 1102 | /* Since TTL is one, subsequent queries should fail */ |
| 1103 | PJ_LOG(3,(THIS_FILE, " srv_resolve(): cache expires scenario")); |
| 1104 | |
| 1105 | |
| 1106 | pj_thread_sleep(1000); |
| 1107 | |
| 1108 | g_server[0].action = PJ_DNS_RCODE_NXDOMAIN; |
| 1109 | g_server[1].action = PJ_DNS_RCODE_NXDOMAIN; |
| 1110 | |
| 1111 | status = pj_dns_srv_resolve(&domain, &res_name, 5061, pool, resolver, PJ_TRUE, |
| 1112 | NULL, &srv_cb_1b, NULL); |
| 1113 | pj_assert(status == PJ_SUCCESS); |
| 1114 | |
| 1115 | pj_sem_wait(sem); |
| 1116 | |
| 1117 | return 0; |
| 1118 | } |
| 1119 | |
| 1120 | |
| 1121 | //////////////////////////////////////////////////////////////////////////// |
| 1122 | /* Fallback because there's no SRV in answer */ |
| 1123 | #define TARGET "domain2.com" |
| 1124 | #define IP_ADDR2 0x02030405 |
| 1125 | #define PORT2 50062 |
| 1126 | |
| 1127 | static void action2_1(const pj_dns_parsed_packet *pkt, |
| 1128 | pj_dns_parsed_packet **p_res) |
| 1129 | { |
| 1130 | pj_dns_parsed_packet *res; |
| 1131 | |
| 1132 | res = PJ_POOL_ZALLOC_T(pool, pj_dns_parsed_packet); |
| 1133 | |
| 1134 | res->q = PJ_POOL_ZALLOC_T(pool, pj_dns_parsed_query); |
| 1135 | res->ans = (pj_dns_parsed_rr*) |
| 1136 | pj_pool_calloc(pool, 4, sizeof(pj_dns_parsed_rr)); |
| 1137 | |
| 1138 | res->hdr.qdcount = 1; |
| 1139 | res->q[0].type = pkt->q[0].type; |
| 1140 | res->q[0].dnsclass = pkt->q[0].dnsclass; |
| 1141 | res->q[0].name = pkt->q[0].name; |
| 1142 | |
| 1143 | if (pkt->q[0].type == PJ_DNS_TYPE_SRV) { |
| 1144 | |
| 1145 | pj_assert(pj_strcmp2(&pkt->q[0].name, "_sip._udp." TARGET)==0); |
| 1146 | |
| 1147 | res->hdr.anscount = 1; |
| 1148 | res->ans[0].type = PJ_DNS_TYPE_A; // <-- this will cause the fallback |
| 1149 | res->ans[0].dnsclass = 1; |
| 1150 | res->ans[0].name = res->q[0].name; |
| 1151 | res->ans[0].ttl = 1; |
| 1152 | res->ans[0].rdata.srv.prio = 1; |
| 1153 | res->ans[0].rdata.srv.weight = 2; |
| 1154 | res->ans[0].rdata.srv.port = PORT2; |
| 1155 | res->ans[0].rdata.srv.target = pj_str("sip01." TARGET); |
| 1156 | |
| 1157 | } else if (pkt->q[0].type == PJ_DNS_TYPE_A) { |
| 1158 | char *alias = "sipalias01." TARGET; |
| 1159 | |
| 1160 | pj_assert(pj_strcmp2(&res->q[0].name, TARGET)==0); |
| 1161 | |
| 1162 | res->hdr.anscount = 2; |
| 1163 | res->ans[0].type = PJ_DNS_TYPE_CNAME; |
| 1164 | res->ans[0].dnsclass = 1; |
| 1165 | res->ans[0].name = res->q[0].name; |
| 1166 | res->ans[0].ttl = 1; |
| 1167 | res->ans[0].rdata.cname.name = pj_str(alias); |
| 1168 | |
| 1169 | res->ans[1].type = PJ_DNS_TYPE_A; |
| 1170 | res->ans[1].dnsclass = 1; |
| 1171 | res->ans[1].name = pj_str(alias); |
| 1172 | res->ans[1].ttl = 1; |
| 1173 | res->ans[1].rdata.a.ip_addr.s_addr = IP_ADDR2; |
| 1174 | } |
| 1175 | |
| 1176 | *p_res = res; |
| 1177 | } |
| 1178 | |
| 1179 | static void srv_cb_2(void *user_data, |
| 1180 | pj_status_t status, |
| 1181 | const pj_dns_srv_record *rec) |
| 1182 | { |
| 1183 | PJ_UNUSED_ARG(user_data); |
| 1184 | |
| 1185 | pj_sem_post(sem); |
| 1186 | |
| 1187 | PJ_ASSERT_ON_FAIL(status == PJ_SUCCESS, return); |
| 1188 | PJ_ASSERT_ON_FAIL(rec->count == 1, return); |
| 1189 | PJ_ASSERT_ON_FAIL(rec->entry[0].priority == 0, return); |
| 1190 | PJ_ASSERT_ON_FAIL(rec->entry[0].weight == 0, return); |
| 1191 | PJ_ASSERT_ON_FAIL(pj_strcmp2(&rec->entry[0].server.name, TARGET)==0, |
| 1192 | return); |
| 1193 | PJ_ASSERT_ON_FAIL(pj_strcmp2(&rec->entry[0].server.alias, "sipalias01." TARGET)==0, |
| 1194 | return); |
| 1195 | PJ_ASSERT_ON_FAIL(rec->entry[0].server.addr[0].s_addr == IP_ADDR2, return); |
| 1196 | PJ_ASSERT_ON_FAIL(rec->entry[0].port == PORT2, return); |
| 1197 | } |
| 1198 | |
| 1199 | static int srv_resolver_fallback_test(void) |
| 1200 | { |
| 1201 | pj_status_t status; |
| 1202 | pj_str_t domain = pj_str(TARGET); |
| 1203 | pj_str_t res_name = pj_str("_sip._udp."); |
| 1204 | |
| 1205 | PJ_LOG(3,(THIS_FILE, " srv_resolve(): fallback test")); |
| 1206 | |
| 1207 | g_server[0].action = ACTION_CB; |
| 1208 | g_server[0].action_cb = &action2_1; |
| 1209 | g_server[1].action = ACTION_CB; |
| 1210 | g_server[1].action_cb = &action2_1; |
| 1211 | |
| 1212 | status = pj_dns_srv_resolve(&domain, &res_name, PORT2, pool, resolver, PJ_TRUE, |
| 1213 | NULL, &srv_cb_2, NULL); |
| 1214 | if (status != PJ_SUCCESS) { |
| 1215 | app_perror(" srv_resolve error", status); |
| 1216 | pj_assert(status == PJ_SUCCESS); |
| 1217 | } |
| 1218 | |
| 1219 | pj_sem_wait(sem); |
| 1220 | |
| 1221 | /* Subsequent query should just get the response from the cache */ |
| 1222 | PJ_LOG(3,(THIS_FILE, " srv_resolve(): cache test")); |
| 1223 | g_server[0].pkt_count = 0; |
| 1224 | g_server[1].pkt_count = 0; |
| 1225 | |
| 1226 | status = pj_dns_srv_resolve(&domain, &res_name, PORT2, pool, resolver, PJ_TRUE, |
| 1227 | NULL, &srv_cb_2, NULL); |
| 1228 | if (status != PJ_SUCCESS) { |
| 1229 | app_perror(" srv_resolve error", status); |
| 1230 | pj_assert(status == PJ_SUCCESS); |
| 1231 | } |
| 1232 | |
| 1233 | pj_sem_wait(sem); |
| 1234 | |
| 1235 | pj_assert(g_server[0].pkt_count == 0); |
| 1236 | pj_assert(g_server[1].pkt_count == 0); |
| 1237 | |
| 1238 | return 0; |
| 1239 | } |
| 1240 | |
| 1241 | |
| 1242 | //////////////////////////////////////////////////////////////////////////// |
| 1243 | /* Too many SRV or A entries */ |
| 1244 | #define DOMAIN3 "d3" |
| 1245 | #define SRV_COUNT3 (PJ_DNS_SRV_MAX_ADDR+1) |
| 1246 | #define A_COUNT3 (PJ_DNS_MAX_IP_IN_A_REC+1) |
| 1247 | #define PORT3 50063 |
| 1248 | #define IP_ADDR3 0x03030303 |
| 1249 | |
| 1250 | static void action3_1(const pj_dns_parsed_packet *pkt, |
| 1251 | pj_dns_parsed_packet **p_res) |
| 1252 | { |
| 1253 | pj_dns_parsed_packet *res; |
| 1254 | unsigned i; |
| 1255 | |
| 1256 | res = PJ_POOL_ZALLOC_T(pool, pj_dns_parsed_packet); |
| 1257 | |
| 1258 | if (res->q == NULL) { |
| 1259 | res->q = PJ_POOL_ZALLOC_T(pool, pj_dns_parsed_query); |
| 1260 | } |
| 1261 | |
| 1262 | res->hdr.qdcount = 1; |
| 1263 | res->q[0].type = pkt->q[0].type; |
| 1264 | res->q[0].dnsclass = pkt->q[0].dnsclass; |
| 1265 | res->q[0].name = pkt->q[0].name; |
| 1266 | |
| 1267 | if (pkt->q[0].type == PJ_DNS_TYPE_SRV) { |
| 1268 | |
| 1269 | pj_assert(pj_strcmp2(&pkt->q[0].name, "_sip._udp." DOMAIN3)==0); |
| 1270 | |
| 1271 | res->hdr.anscount = SRV_COUNT3; |
| 1272 | res->ans = (pj_dns_parsed_rr*) |
| 1273 | pj_pool_calloc(pool, SRV_COUNT3, sizeof(pj_dns_parsed_rr)); |
| 1274 | |
| 1275 | for (i=0; i<SRV_COUNT3; ++i) { |
| 1276 | char *target; |
| 1277 | |
| 1278 | res->ans[i].type = PJ_DNS_TYPE_SRV; |
| 1279 | res->ans[i].dnsclass = 1; |
| 1280 | res->ans[i].name = res->q[0].name; |
| 1281 | res->ans[i].ttl = 1; |
| 1282 | res->ans[i].rdata.srv.prio = (pj_uint16_t)i; |
| 1283 | res->ans[i].rdata.srv.weight = 2; |
| 1284 | res->ans[i].rdata.srv.port = (pj_uint16_t)(PORT3+i); |
| 1285 | |
| 1286 | target = (char*)pj_pool_alloc(pool, 16); |
| 1287 | sprintf(target, "sip%02d." DOMAIN3, i); |
| 1288 | res->ans[i].rdata.srv.target = pj_str(target); |
| 1289 | } |
| 1290 | |
| 1291 | } else if (pkt->q[0].type == PJ_DNS_TYPE_A) { |
| 1292 | |
| 1293 | //pj_assert(pj_strcmp2(&res->q[0].name, "sip." DOMAIN3)==0); |
| 1294 | |
| 1295 | res->hdr.anscount = A_COUNT3; |
| 1296 | res->ans = (pj_dns_parsed_rr*) |
| 1297 | pj_pool_calloc(pool, A_COUNT3, sizeof(pj_dns_parsed_rr)); |
| 1298 | |
| 1299 | for (i=0; i<A_COUNT3; ++i) { |
| 1300 | res->ans[i].type = PJ_DNS_TYPE_A; |
| 1301 | res->ans[i].dnsclass = 1; |
| 1302 | res->ans[i].ttl = 1; |
| 1303 | res->ans[i].name = res->q[0].name; |
| 1304 | res->ans[i].rdata.a.ip_addr.s_addr = IP_ADDR3+i; |
| 1305 | } |
| 1306 | } |
| 1307 | |
| 1308 | *p_res = res; |
| 1309 | } |
| 1310 | |
| 1311 | static void srv_cb_3(void *user_data, |
| 1312 | pj_status_t status, |
| 1313 | const pj_dns_srv_record *rec) |
| 1314 | { |
| 1315 | unsigned i; |
| 1316 | |
| 1317 | PJ_UNUSED_ARG(user_data); |
| 1318 | PJ_UNUSED_ARG(status); |
| 1319 | PJ_UNUSED_ARG(rec); |
| 1320 | |
| 1321 | pj_assert(status == PJ_SUCCESS); |
| 1322 | pj_assert(rec->count == PJ_DNS_SRV_MAX_ADDR); |
| 1323 | |
| 1324 | for (i=0; i<PJ_DNS_SRV_MAX_ADDR; ++i) { |
| 1325 | unsigned j; |
| 1326 | |
| 1327 | pj_assert(rec->entry[i].priority == i); |
| 1328 | pj_assert(rec->entry[i].weight == 2); |
| 1329 | //pj_assert(pj_strcmp2(&rec->entry[i].server.name, "sip." DOMAIN3)==0); |
| 1330 | pj_assert(rec->entry[i].server.alias.slen == 0); |
| 1331 | pj_assert(rec->entry[i].port == PORT3+i); |
| 1332 | |
| 1333 | pj_assert(rec->entry[i].server.addr_count == PJ_DNS_MAX_IP_IN_A_REC); |
| 1334 | |
| 1335 | for (j=0; j<PJ_DNS_MAX_IP_IN_A_REC; ++j) { |
| 1336 | pj_assert(rec->entry[i].server.addr[j].s_addr == IP_ADDR3+j); |
| 1337 | } |
| 1338 | } |
| 1339 | |
| 1340 | pj_sem_post(sem); |
| 1341 | } |
| 1342 | |
| 1343 | static int srv_resolver_many_test(void) |
| 1344 | { |
| 1345 | pj_status_t status; |
| 1346 | pj_str_t domain = pj_str(DOMAIN3); |
| 1347 | pj_str_t res_name = pj_str("_sip._udp."); |
| 1348 | |
| 1349 | /* Successful scenario */ |
| 1350 | PJ_LOG(3,(THIS_FILE, " srv_resolve(): too many entries test")); |
| 1351 | |
| 1352 | g_server[0].action = ACTION_CB; |
| 1353 | g_server[0].action_cb = &action3_1; |
| 1354 | g_server[1].action = ACTION_CB; |
| 1355 | g_server[1].action_cb = &action3_1; |
| 1356 | |
| 1357 | g_server[0].pkt_count = 0; |
| 1358 | g_server[1].pkt_count = 0; |
| 1359 | |
| 1360 | status = pj_dns_srv_resolve(&domain, &res_name, 1, pool, resolver, PJ_TRUE, |
| 1361 | NULL, &srv_cb_3, NULL); |
| 1362 | pj_assert(status == PJ_SUCCESS); |
| 1363 | |
| 1364 | pj_sem_wait(sem); |
| 1365 | |
| 1366 | return 0; |
| 1367 | } |
| 1368 | |
| 1369 | |
| 1370 | //////////////////////////////////////////////////////////////////////////// |
| 1371 | |
| 1372 | |
| 1373 | int resolver_test(void) |
| 1374 | { |
| 1375 | int rc; |
| 1376 | |
| 1377 | rc = init(); |
| 1378 | if (rc != 0) |
| 1379 | goto on_error; |
| 1380 | |
| 1381 | rc = a_parser_test(); |
| 1382 | if (rc != 0) |
| 1383 | goto on_error; |
| 1384 | |
| 1385 | rc = simple_test(); |
| 1386 | if (rc != 0) |
| 1387 | goto on_error; |
| 1388 | |
| 1389 | rc = dns_test(); |
| 1390 | if (rc != 0) |
| 1391 | goto on_error; |
| 1392 | |
| 1393 | srv_resolver_test(); |
| 1394 | srv_resolver_fallback_test(); |
| 1395 | srv_resolver_many_test(); |
| 1396 | |
| 1397 | destroy(); |
| 1398 | return 0; |
| 1399 | |
| 1400 | on_error: |
| 1401 | destroy(); |
| 1402 | return rc; |
| 1403 | } |
| 1404 | |
| 1405 | |