Benny Prijono | 14c2b86 | 2007-02-21 00:40:05 +0000 | [diff] [blame^] | 1 | /* $Id$ */ |
| 2 | /* |
| 3 | * Copyright (C) 2003-2005 Benny Prijono <benny@prijono.org> |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation; either version 2 of the License, or |
| 8 | * (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software |
| 17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 18 | */ |
| 19 | #include <pjlib-util.h> |
| 20 | #include <pjlib.h> |
| 21 | #include "server.h" |
| 22 | |
| 23 | #include <stdio.h> |
| 24 | #include <conio.h> |
| 25 | |
| 26 | |
| 27 | #define THIS_FILE "server_main.c" |
| 28 | #define MAX_THREADS 8 |
| 29 | |
| 30 | struct stun_server_tag server; |
| 31 | |
| 32 | |
| 33 | pj_status_t server_perror(const char *sender, const char *title, |
| 34 | pj_status_t status) |
| 35 | { |
| 36 | char errmsg[PJ_ERR_MSG_SIZE]; |
| 37 | pj_strerror(status, errmsg, sizeof(errmsg)); |
| 38 | |
| 39 | PJ_LOG(3,(sender, "%s: %s", title, errmsg)); |
| 40 | |
| 41 | return status; |
| 42 | } |
| 43 | |
| 44 | |
| 45 | static pj_status_t create_response(pj_pool_t *pool, |
| 46 | const pj_stun_msg *req_msg, |
| 47 | unsigned err_code, |
| 48 | unsigned uattr_cnt, |
| 49 | pj_uint16_t uattr_types[], |
| 50 | pj_stun_msg **p_response) |
| 51 | { |
| 52 | pj_uint32_t msg_type = req_msg->hdr.type; |
| 53 | pj_stun_msg *response; |
| 54 | pj_stun_error_code_attr *err_attr; |
| 55 | pj_status_t status; |
| 56 | |
| 57 | /* Create response or error response */ |
| 58 | if (err_code) |
| 59 | msg_type |= PJ_STUN_ERROR_RESPONSE_BIT; |
| 60 | else |
| 61 | msg_type |= PJ_STUN_RESPONSE_BIT; |
| 62 | |
| 63 | status = pj_stun_msg_create(pool, msg_type, req_msg->hdr.magic, |
| 64 | req_msg->hdr.tsx_id, &response); |
| 65 | if (status != PJ_SUCCESS) { |
| 66 | return status; |
| 67 | } |
| 68 | |
| 69 | /* Add error code attribute */ |
| 70 | if (err_code) { |
| 71 | status = pj_stun_error_code_attr_create(pool, err_code, NULL, |
| 72 | &err_attr); |
| 73 | if (status != PJ_SUCCESS) { |
| 74 | return status; |
| 75 | } |
| 76 | |
| 77 | pj_stun_msg_add_attr(response, &err_attr->hdr); |
| 78 | } |
| 79 | |
| 80 | /* Add unknown_attribute attributes if err_code is 420 */ |
| 81 | if (err_code == PJ_STUN_STATUS_UNKNOWN_ATTRIBUTE) { |
| 82 | pj_stun_unknown_attr *uattr; |
| 83 | |
| 84 | status = pj_stun_unknown_attr_create(pool, uattr_cnt, uattr_types, |
| 85 | &uattr); |
| 86 | if (status != PJ_SUCCESS) |
| 87 | return status; |
| 88 | |
| 89 | pj_stun_msg_add_attr(response, &uattr->hdr); |
| 90 | } |
| 91 | |
| 92 | *p_response = response; |
| 93 | return PJ_SUCCESS; |
| 94 | } |
| 95 | |
| 96 | |
| 97 | static pj_status_t send_msg(struct service *svc, const pj_stun_msg *msg) |
| 98 | { |
| 99 | unsigned tx_pkt_len; |
| 100 | pj_ssize_t length; |
| 101 | pj_status_t status; |
| 102 | |
| 103 | /* Encode packet */ |
| 104 | tx_pkt_len = sizeof(svc->tx_pkt); |
| 105 | status = pj_stun_msg_encode(msg, svc->tx_pkt, tx_pkt_len, 0, |
| 106 | &tx_pkt_len); |
| 107 | if (status != PJ_SUCCESS) |
| 108 | return status; |
| 109 | |
| 110 | length = tx_pkt_len; |
| 111 | |
| 112 | /* Send packet */ |
| 113 | if (svc->is_stream) { |
| 114 | status = pj_ioqueue_send(svc->key, &svc->send_opkey, svc->tx_pkt, |
| 115 | &length, 0); |
| 116 | } else { |
| 117 | status = pj_ioqueue_sendto(svc->key, &svc->send_opkey, svc->tx_pkt, |
| 118 | &length, 0, &svc->src_addr, |
| 119 | svc->src_addr_len); |
| 120 | } |
| 121 | |
| 122 | PJ_LOG(4,(THIS_FILE, "Sending STUN %s %s", |
| 123 | pj_stun_get_method_name(msg->hdr.type), |
| 124 | pj_stun_get_class_name(msg->hdr.type))); |
| 125 | |
| 126 | return (status == PJ_SUCCESS || status == PJ_EPENDING) ? |
| 127 | PJ_SUCCESS : status; |
| 128 | } |
| 129 | |
| 130 | |
| 131 | static pj_status_t err_respond(struct service *svc, |
| 132 | pj_pool_t *pool, |
| 133 | const pj_stun_msg *req_msg, |
| 134 | unsigned err_code, |
| 135 | unsigned uattr_cnt, |
| 136 | pj_uint16_t uattr_types[]) |
| 137 | { |
| 138 | pj_stun_msg *response; |
| 139 | pj_status_t status; |
| 140 | |
| 141 | /* Create the error response */ |
| 142 | status = create_response(pool, req_msg, err_code, |
| 143 | uattr_cnt, uattr_types, &response); |
| 144 | if (status != PJ_SUCCESS) { |
| 145 | server_perror(THIS_FILE, "Error creating response", status); |
| 146 | return status; |
| 147 | } |
| 148 | |
| 149 | /* Send response */ |
| 150 | status = send_msg(svc, response); |
| 151 | if (status != PJ_SUCCESS) { |
| 152 | server_perror(THIS_FILE, "Error sending response", status); |
| 153 | return status; |
| 154 | } |
| 155 | |
| 156 | return PJ_SUCCESS; |
| 157 | } |
| 158 | |
| 159 | |
| 160 | static void handle_binding_request(struct service *svc, pj_pool_t *pool, |
| 161 | const pj_stun_msg *rx_msg) |
| 162 | { |
| 163 | pj_stun_msg *response; |
| 164 | pj_stun_generic_ip_addr_attr *m_attr; |
| 165 | pj_status_t status; |
| 166 | |
| 167 | status = create_response(pool, rx_msg, 0, 0, NULL, &response); |
| 168 | if (status != PJ_SUCCESS) { |
| 169 | server_perror(THIS_FILE, "Error creating response", status); |
| 170 | return; |
| 171 | } |
| 172 | |
| 173 | /* Create MAPPED-ADDRESS attribute */ |
| 174 | status = pj_stun_generic_ip_addr_attr_create(pool, |
| 175 | PJ_STUN_ATTR_MAPPED_ADDR, |
| 176 | PJ_FALSE, |
| 177 | svc->src_addr_len, |
| 178 | &svc->src_addr, &m_attr); |
| 179 | if (status != PJ_SUCCESS) { |
| 180 | server_perror(THIS_FILE, "Error creating response", status); |
| 181 | return; |
| 182 | } |
| 183 | pj_stun_msg_add_attr(response, &m_attr->hdr); |
| 184 | |
| 185 | /* On the presence of magic, create XOR-MAPPED-ADDRESS attribute */ |
| 186 | if (rx_msg->hdr.magic == PJ_STUN_MAGIC) { |
| 187 | status = |
| 188 | pj_stun_generic_ip_addr_attr_create(pool, |
| 189 | PJ_STUN_ATTR_XOR_MAPPED_ADDRESS, |
| 190 | PJ_TRUE, |
| 191 | svc->src_addr_len, |
| 192 | &svc->src_addr, &m_attr); |
| 193 | if (status != PJ_SUCCESS) { |
| 194 | server_perror(THIS_FILE, "Error creating response", status); |
| 195 | return; |
| 196 | } |
| 197 | } |
| 198 | |
| 199 | /* Send */ |
| 200 | status = send_msg(svc, response); |
| 201 | if (status != PJ_SUCCESS) |
| 202 | server_perror(THIS_FILE, "Error sending response", status); |
| 203 | } |
| 204 | |
| 205 | |
| 206 | static void handle_unknown_request(struct service *svc, pj_pool_t *pool, |
| 207 | pj_stun_msg *rx_msg) |
| 208 | { |
| 209 | err_respond(svc, pool, rx_msg, PJ_STUN_STATUS_BAD_REQUEST, 0, NULL); |
| 210 | } |
| 211 | |
| 212 | |
| 213 | static void on_read_complete(pj_ioqueue_key_t *key, |
| 214 | pj_ioqueue_op_key_t *op_key, |
| 215 | pj_ssize_t bytes_read) |
| 216 | { |
| 217 | struct service *svc = (struct service *) pj_ioqueue_get_user_data(key); |
| 218 | pj_pool_t *pool = NULL; |
| 219 | pj_stun_msg *rx_msg; |
| 220 | unsigned err_code; |
| 221 | unsigned uattr_cnt; |
| 222 | pj_uint16_t uattr_types[16]; |
| 223 | pj_status_t status; |
| 224 | |
| 225 | if (bytes_read <= 0) |
| 226 | goto next_read; |
| 227 | |
| 228 | pool = pj_pool_create(&server.cp.factory, "service", 4000, 4000, NULL); |
| 229 | |
| 230 | err_code = 0; |
| 231 | uattr_cnt = PJ_ARRAY_SIZE(uattr_types); |
| 232 | rx_msg = NULL; |
| 233 | status = pj_stun_msg_decode(pool, svc->rx_pkt, bytes_read, 0, &rx_msg, |
| 234 | NULL, &err_code, &uattr_cnt, uattr_types); |
| 235 | if (status != PJ_SUCCESS) { |
| 236 | server_perror(THIS_FILE, "STUN msg_decode() error", status); |
| 237 | if (err_code != 0 && rx_msg && PJ_STUN_IS_REQUEST(rx_msg->hdr.type)) { |
| 238 | err_respond(svc, pool, rx_msg, err_code, |
| 239 | uattr_cnt, uattr_types); |
| 240 | } |
| 241 | goto next_read; |
| 242 | } |
| 243 | |
| 244 | PJ_LOG(4,(THIS_FILE, "RX STUN %s %s message", |
| 245 | pj_stun_get_method_name(rx_msg->hdr.type), |
| 246 | pj_stun_get_class_name(rx_msg->hdr.type))); |
| 247 | |
| 248 | if (PJ_STUN_IS_REQUEST(rx_msg->hdr.type)) { |
| 249 | switch (rx_msg->hdr.type) { |
| 250 | case PJ_STUN_BINDING_REQUEST: |
| 251 | handle_binding_request(svc, pool, rx_msg); |
| 252 | break; |
| 253 | default: |
| 254 | handle_unknown_request(svc, pool, rx_msg); |
| 255 | } |
| 256 | |
| 257 | } |
| 258 | |
| 259 | next_read: |
| 260 | if (pool != NULL) |
| 261 | pj_pool_release(pool); |
| 262 | |
| 263 | if (bytes_read < 0) { |
| 264 | server_perror(THIS_FILE, "on_read_complete()", -bytes_read); |
| 265 | } |
| 266 | |
| 267 | svc->rx_pkt_len = sizeof(svc->rx_pkt); |
| 268 | svc->src_addr_len = sizeof(svc->src_addr); |
| 269 | |
| 270 | status = pj_ioqueue_recvfrom(svc->key, &svc->recv_opkey, |
| 271 | svc->rx_pkt, &svc->rx_pkt_len, |
| 272 | PJ_IOQUEUE_ALWAYS_ASYNC, |
| 273 | &svc->src_addr, &svc->src_addr_len); |
| 274 | if (status != PJ_EPENDING) |
| 275 | server_perror(THIS_FILE, "error starting async read", status); |
| 276 | } |
| 277 | |
| 278 | |
| 279 | static pj_status_t init_service(struct service *svc) |
| 280 | { |
| 281 | pj_status_t status; |
| 282 | pj_ioqueue_callback service_callback; |
| 283 | pj_sockaddr_in addr; |
| 284 | |
| 285 | status = pj_sock_socket(PJ_AF_INET, PJ_SOCK_DGRAM, 0, &svc->sock); |
| 286 | if (status != PJ_SUCCESS) |
| 287 | return status; |
| 288 | |
| 289 | status = pj_sockaddr_in_init(&addr, NULL, svc->port); |
| 290 | if (status != PJ_SUCCESS) |
| 291 | goto on_error; |
| 292 | |
| 293 | status = pj_sock_bind(svc->sock, &addr, sizeof(addr)); |
| 294 | if (status != PJ_SUCCESS) |
| 295 | goto on_error; |
| 296 | |
| 297 | pj_bzero(&service_callback, sizeof(service_callback)); |
| 298 | service_callback.on_read_complete = &on_read_complete; |
| 299 | |
| 300 | status = pj_ioqueue_register_sock(server.pool, server.ioqueue, svc->sock, |
| 301 | svc, &service_callback, &svc->key); |
| 302 | if (status != PJ_SUCCESS) |
| 303 | goto on_error; |
| 304 | |
| 305 | |
| 306 | pj_ioqueue_op_key_init(&svc->recv_opkey, sizeof(svc->recv_opkey)); |
| 307 | pj_ioqueue_op_key_init(&svc->send_opkey, sizeof(svc->send_opkey)); |
| 308 | |
| 309 | on_read_complete(svc->key, &svc->recv_opkey, 0); |
| 310 | |
| 311 | PJ_LOG(4,(THIS_FILE, "Service started on port %d", svc->port)); |
| 312 | return PJ_SUCCESS; |
| 313 | |
| 314 | on_error: |
| 315 | if (svc->key != NULL) { |
| 316 | pj_ioqueue_unregister(svc->key); |
| 317 | svc->key = NULL; |
| 318 | svc->sock = PJ_INVALID_SOCKET; |
| 319 | } else if (svc->sock != 0 && svc->sock != PJ_INVALID_SOCKET) { |
| 320 | pj_sock_close(svc->sock); |
| 321 | svc->sock = PJ_INVALID_SOCKET; |
| 322 | } |
| 323 | |
| 324 | return status; |
| 325 | } |
| 326 | |
| 327 | |
| 328 | static int worker_thread(void *p) |
| 329 | { |
| 330 | PJ_UNUSED_ARG(p); |
| 331 | |
| 332 | while (!server.thread_quit_flag) { |
| 333 | pj_time_val timeout = { 0, 50 }; |
| 334 | pj_ioqueue_poll(server.ioqueue, &timeout); |
| 335 | } |
| 336 | |
| 337 | return 0; |
| 338 | } |
| 339 | |
| 340 | |
| 341 | pj_status_t server_init(void) |
| 342 | { |
| 343 | pj_status_t status; |
| 344 | |
| 345 | status = pj_init(); |
| 346 | if (status != PJ_SUCCESS) |
| 347 | return server_perror(THIS_FILE, "pj_init() error", status); |
| 348 | |
| 349 | status = pjlib_util_init(); |
| 350 | if (status != PJ_SUCCESS) |
| 351 | return server_perror(THIS_FILE, "pjlib_util_init() error", status); |
| 352 | |
| 353 | pj_caching_pool_init(&server.cp, |
| 354 | &pj_pool_factory_default_policy, 0); |
| 355 | |
| 356 | |
| 357 | server.pool = pj_pool_create(&server.cp.factory, "server", 4000, 4000, |
| 358 | NULL); |
| 359 | |
| 360 | status = pj_ioqueue_create(server.pool, PJ_IOQUEUE_MAX_HANDLES, |
| 361 | &server.ioqueue); |
| 362 | if (status != PJ_SUCCESS) |
| 363 | return server_perror(THIS_FILE, "pj_ioqueue_create()", status); |
| 364 | |
| 365 | server.service_cnt = 1; |
| 366 | server.services[0].index = 0; |
| 367 | server.services[0].port = PJ_STUN_PORT; |
| 368 | |
| 369 | status = init_service(&server.services[0]); |
| 370 | if (status != PJ_SUCCESS) |
| 371 | return server_perror(THIS_FILE, "init_service() error", status); |
| 372 | |
| 373 | return PJ_SUCCESS; |
| 374 | } |
| 375 | |
| 376 | |
| 377 | pj_status_t server_main(void) |
| 378 | { |
| 379 | #if 1 |
| 380 | for (;;) { |
| 381 | pj_time_val timeout = { 0, 50 }; |
| 382 | pj_ioqueue_poll(server.ioqueue, &timeout); |
| 383 | |
| 384 | if (kbhit() && _getch()==27) |
| 385 | break; |
| 386 | } |
| 387 | #else |
| 388 | pj_status_t status; |
| 389 | char line[10]; |
| 390 | |
| 391 | status = pj_thread_create(server.pool, "stun_server", &worker_thread, NULL, |
| 392 | 0, 0, &server.threads[0]); |
| 393 | if (status != PJ_SUCCESS) |
| 394 | return server_perror(THIS_FILE, "create_thread() error", status); |
| 395 | |
| 396 | puts("Press ENTER to quit"); |
| 397 | fgets(line, sizeof(line), stdin); |
| 398 | |
| 399 | #endif |
| 400 | |
| 401 | return PJ_SUCCESS; |
| 402 | } |
| 403 | |
| 404 | |
| 405 | pj_status_t server_destroy(void) |
| 406 | { |
| 407 | unsigned i; |
| 408 | |
| 409 | for (i=0; i<PJ_ARRAY_SIZE(server.services); ++i) { |
| 410 | struct service *svc = &server.services[i]; |
| 411 | |
| 412 | if (svc->key != NULL) { |
| 413 | pj_ioqueue_unregister(svc->key); |
| 414 | svc->key = NULL; |
| 415 | svc->sock = PJ_INVALID_SOCKET; |
| 416 | } else if (svc->sock != 0 && svc->sock != PJ_INVALID_SOCKET) { |
| 417 | pj_sock_close(svc->sock); |
| 418 | svc->sock = PJ_INVALID_SOCKET; |
| 419 | } |
| 420 | } |
| 421 | |
| 422 | server.thread_quit_flag = PJ_TRUE; |
| 423 | for (i=0; i<PJ_ARRAY_SIZE(server.threads); ++i) { |
| 424 | if (server.threads[i]) { |
| 425 | pj_thread_join(server.threads[i]); |
| 426 | pj_thread_destroy(server.threads[i]); |
| 427 | server.threads[i] = NULL; |
| 428 | } |
| 429 | } |
| 430 | |
| 431 | pj_ioqueue_destroy(server.ioqueue); |
| 432 | pj_pool_release(server.pool); |
| 433 | pj_caching_pool_destroy(&server.cp); |
| 434 | |
| 435 | pj_shutdown(); |
| 436 | |
| 437 | return PJ_SUCCESS; |
| 438 | } |
| 439 | |
| 440 | |
| 441 | int main() |
| 442 | { |
| 443 | if (server_init()) { |
| 444 | server_destroy(); |
| 445 | return 1; |
| 446 | } |
| 447 | |
| 448 | server_main(); |
| 449 | server_destroy(); |
| 450 | |
| 451 | return 0; |
| 452 | } |