Andy Green | 4739e5c | 2011-01-22 12:51:57 +0000 | [diff] [blame] | 1 | #include "private-libwebsockets.h" |
| 2 | #include <netdb.h> |
| 3 | |
| 4 | |
| 5 | /* |
| 6 | * In-place str to lower case |
| 7 | */ |
| 8 | |
| 9 | void |
| 10 | strtolower(char *s) |
| 11 | { |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 12 | while (*s) { |
| 13 | *s = tolower(*s); |
| 14 | s++; |
| 15 | } |
Andy Green | 4739e5c | 2011-01-22 12:51:57 +0000 | [diff] [blame] | 16 | } |
| 17 | |
| 18 | void |
| 19 | libwebsocket_client_close(struct libwebsocket *wsi) |
| 20 | { |
| 21 | int n = wsi->state; |
| 22 | struct libwebsocket_context *clients; |
| 23 | |
| 24 | /* mark the WSI as dead and let the callback know */ |
| 25 | |
| 26 | wsi->state = WSI_STATE_DEAD_SOCKET; |
| 27 | |
| 28 | if (wsi->protocol) { |
| 29 | if (wsi->protocol->callback && n == WSI_STATE_ESTABLISHED) |
| 30 | wsi->protocol->callback(wsi, LWS_CALLBACK_CLOSED, |
| 31 | wsi->user_space, NULL, 0); |
| 32 | |
| 33 | /* remove it from the client polling list */ |
| 34 | clients = wsi->protocol->owning_server; |
| 35 | if (clients) |
| 36 | for (n = 0; n < clients->fds_count; n++) { |
| 37 | if (clients->wsi[n] != wsi) |
| 38 | continue; |
| 39 | while (n < clients->fds_count - 1) { |
| 40 | clients->fds[n] = clients->fds[n + 1]; |
| 41 | clients->wsi[n] = clients->wsi[n + 1]; |
| 42 | } |
| 43 | /* we only have to deal with one */ |
| 44 | n = clients->fds_count; |
| 45 | } |
| 46 | |
| 47 | } |
| 48 | |
| 49 | /* clean out any parsing allocations */ |
| 50 | |
| 51 | for (n = 0; n < WSI_TOKEN_COUNT; n++) |
| 52 | if (wsi->utf8_token[n].token) |
| 53 | free(wsi->utf8_token[n].token); |
| 54 | |
| 55 | /* shut down reasonably cleanly */ |
| 56 | |
| 57 | #ifdef LWS_OPENSSL_SUPPORT |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 58 | if (wsi->ssl) { |
Andy Green | 4739e5c | 2011-01-22 12:51:57 +0000 | [diff] [blame] | 59 | n = SSL_get_fd(wsi->ssl); |
| 60 | SSL_shutdown(wsi->ssl); |
| 61 | close(n); |
| 62 | SSL_free(wsi->ssl); |
| 63 | } else { |
| 64 | #endif |
| 65 | shutdown(wsi->sock, SHUT_RDWR); |
| 66 | close(wsi->sock); |
| 67 | #ifdef LWS_OPENSSL_SUPPORT |
| 68 | } |
| 69 | #endif |
| 70 | } |
| 71 | |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 72 | |
| 73 | /** |
| 74 | * libwebsocket_client_connect() - Connect to another websocket server |
| 75 | * @this: Websocket context |
| 76 | * @address: Remote server address, eg, "myserver.com" |
| 77 | * @port: Port to connect to on the remote server, eg, 80 |
| 78 | * @ssl_connection: 0 = ws://, 1 = wss:// encrypted, 2 = wss:// allow self |
| 79 | * signed certs |
| 80 | * @path: Websocket path on server |
| 81 | * @host: Hostname on server |
| 82 | * @origin: Socket origin name |
| 83 | * @protocol: Comma-separated list of protocols being asked for from |
| 84 | * the server, or just one. The server will pick the one it |
| 85 | * likes best. |
| 86 | * |
| 87 | * This function creates a connection to a remote server |
| 88 | */ |
| 89 | |
Andy Green | 4739e5c | 2011-01-22 12:51:57 +0000 | [diff] [blame] | 90 | struct libwebsocket * |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 91 | libwebsocket_client_connect(struct libwebsocket_context *this, |
Andy Green | 4739e5c | 2011-01-22 12:51:57 +0000 | [diff] [blame] | 92 | const char *address, |
| 93 | int port, |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 94 | int ssl_connection, |
Andy Green | 4739e5c | 2011-01-22 12:51:57 +0000 | [diff] [blame] | 95 | const char *path, |
| 96 | const char *host, |
| 97 | const char *origin, |
| 98 | const char *protocol) |
| 99 | { |
| 100 | struct hostent *server_hostent; |
| 101 | struct sockaddr_in server_addr; |
| 102 | char buf[150]; |
| 103 | char key_b64[150]; |
| 104 | char hash[20]; |
| 105 | int fd; |
| 106 | struct pollfd pfd; |
| 107 | static const char magic_websocket_guid[] = |
| 108 | "258EAFA5-E914-47DA-95CA-C5AB0DC85B11"; |
| 109 | static const char magic_websocket_04_masking_guid[] = |
| 110 | "61AC5F19-FBBA-4540-B96F-6561F1AB40A8"; |
| 111 | char pkt[1024]; |
| 112 | char *p = &pkt[0]; |
Andy Green | 6964bb5 | 2011-01-23 16:50:33 +0000 | [diff] [blame] | 113 | const char *pc; |
Andy Green | 4739e5c | 2011-01-22 12:51:57 +0000 | [diff] [blame] | 114 | int len; |
| 115 | int okay = 0; |
| 116 | struct libwebsocket *wsi; |
| 117 | int n; |
Andy Green | 9659f37 | 2011-01-27 22:01:43 +0000 | [diff] [blame] | 118 | int plen = 0; |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 119 | #ifdef LWS_OPENSSL_SUPPORT |
| 120 | char ssl_err_buf[512]; |
| 121 | #else |
| 122 | if (ssl_connection) { |
| 123 | fprintf(stderr, "libwebsockets not configured for ssl\n"); |
| 124 | return NULL; |
| 125 | } |
| 126 | #endif |
Andy Green | 4739e5c | 2011-01-22 12:51:57 +0000 | [diff] [blame] | 127 | |
Andy Green | 6964bb5 | 2011-01-23 16:50:33 +0000 | [diff] [blame] | 128 | wsi = malloc(sizeof(struct libwebsocket)); |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 129 | if (wsi == NULL) { |
Andy Green | 9659f37 | 2011-01-27 22:01:43 +0000 | [diff] [blame] | 130 | fprintf(stderr, "Out of memory allocing new connection\n"); |
Andy Green | 4739e5c | 2011-01-22 12:51:57 +0000 | [diff] [blame] | 131 | return NULL; |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 132 | } |
Andy Green | 4739e5c | 2011-01-22 12:51:57 +0000 | [diff] [blame] | 133 | |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 134 | this->wsi[this->fds_count] = wsi; |
Andy Green | 4739e5c | 2011-01-22 12:51:57 +0000 | [diff] [blame] | 135 | |
| 136 | wsi->ietf_spec_revision = 4; |
| 137 | wsi->name_buffer_pos = 0; |
| 138 | wsi->user_space = NULL; |
| 139 | wsi->state = WSI_STATE_CLIENT_UNCONNECTED; |
| 140 | wsi->pings_vs_pongs = 0; |
| 141 | |
| 142 | for (n = 0; n < WSI_TOKEN_COUNT; n++) { |
| 143 | wsi->utf8_token[n].token = NULL; |
| 144 | wsi->utf8_token[n].token_len = 0; |
| 145 | } |
| 146 | |
| 147 | /* |
Andy Green | 9659f37 | 2011-01-27 22:01:43 +0000 | [diff] [blame] | 148 | * proxy? |
| 149 | */ |
| 150 | |
| 151 | if (this->http_proxy_port) { |
| 152 | plen = sprintf(pkt, "CONNECT %s:%u HTTP/1.0\x0d\x0a" |
| 153 | "User-agent: libwebsockets\x0d\x0a" |
| 154 | /*Proxy-authorization: basic aGVsbG86d29ybGQ= */ |
| 155 | "\x0d\x0a", address, port); |
| 156 | |
| 157 | /* OK from now on we talk via the proxy */ |
| 158 | |
| 159 | address = this->http_proxy_address; |
| 160 | port = this->http_proxy_port; |
| 161 | } |
| 162 | |
| 163 | /* |
| 164 | * prepare the actual connection (to the proxy, if any) |
Andy Green | 4739e5c | 2011-01-22 12:51:57 +0000 | [diff] [blame] | 165 | */ |
| 166 | |
| 167 | server_hostent = gethostbyname(address); |
| 168 | if (server_hostent == NULL) { |
| 169 | fprintf(stderr, "Unable to get host name from %s\n", address); |
| 170 | goto bail1; |
| 171 | } |
| 172 | |
| 173 | wsi->sock = socket(AF_INET, SOCK_STREAM, 0); |
Andy Green | 6964bb5 | 2011-01-23 16:50:33 +0000 | [diff] [blame] | 174 | |
Andy Green | 4739e5c | 2011-01-22 12:51:57 +0000 | [diff] [blame] | 175 | if (wsi->sock < 0) { |
| 176 | fprintf(stderr, "Unable to open socket\n"); |
| 177 | goto bail1; |
| 178 | } |
| 179 | |
| 180 | |
| 181 | server_addr.sin_family = AF_INET; |
| 182 | server_addr.sin_port = htons(port); |
| 183 | server_addr.sin_addr = *((struct in_addr *)server_hostent->h_addr); |
| 184 | bzero(&server_addr.sin_zero, 8); |
| 185 | |
| 186 | if (connect(wsi->sock, (struct sockaddr *)&server_addr, |
| 187 | sizeof(struct sockaddr)) == -1) { |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 188 | fprintf(stderr, "Connect failed\n"); |
Andy Green | 4739e5c | 2011-01-22 12:51:57 +0000 | [diff] [blame] | 189 | goto bail1; |
Andy Green | 6964bb5 | 2011-01-23 16:50:33 +0000 | [diff] [blame] | 190 | } |
Andy Green | 4739e5c | 2011-01-22 12:51:57 +0000 | [diff] [blame] | 191 | |
Andy Green | 9659f37 | 2011-01-27 22:01:43 +0000 | [diff] [blame] | 192 | /* we are connected to server, or proxy */ |
| 193 | |
Andy Green | 9659f37 | 2011-01-27 22:01:43 +0000 | [diff] [blame] | 194 | if (this->http_proxy_port) { |
| 195 | |
| 196 | n = send(wsi->sock, pkt, plen, 0); |
| 197 | if (n < 0) { |
Andy Green | 5b9a4c0 | 2011-01-28 09:39:29 +0000 | [diff] [blame^] | 198 | close(wsi->sock); |
| 199 | fprintf(stderr, "ERROR writing to proxy socket\n"); |
| 200 | goto bail1; |
| 201 | } |
| 202 | |
| 203 | pfd.fd = wsi->sock; |
| 204 | pfd.events = POLLIN; |
| 205 | pfd.revents = 0; |
| 206 | |
| 207 | n = poll(&pfd, 1, 5000); |
| 208 | if (n <= 0) { |
| 209 | close(wsi->sock); |
| 210 | fprintf(stderr, "libwebsocket_client_handshake " |
| 211 | "timeout on proxy response"); |
Andy Green | 02244bb | 2011-01-28 09:01:19 +0000 | [diff] [blame] | 212 | goto bail1; |
Andy Green | 9659f37 | 2011-01-27 22:01:43 +0000 | [diff] [blame] | 213 | } |
| 214 | |
| 215 | n = recv(wsi->sock, pkt, sizeof pkt, 0); |
| 216 | if (n < 0) { |
Andy Green | 02244bb | 2011-01-28 09:01:19 +0000 | [diff] [blame] | 217 | close(wsi->sock); |
Andy Green | 5b9a4c0 | 2011-01-28 09:39:29 +0000 | [diff] [blame^] | 218 | fprintf(stderr, "ERROR reading from proxy socket\n"); |
Andy Green | 02244bb | 2011-01-28 09:01:19 +0000 | [diff] [blame] | 219 | goto bail1; |
Andy Green | 9659f37 | 2011-01-27 22:01:43 +0000 | [diff] [blame] | 220 | } |
| 221 | |
| 222 | pkt[13] = '\0'; |
| 223 | if (strcmp(pkt, "HTTP/1.0 200 ") != 0) { |
Andy Green | 02244bb | 2011-01-28 09:01:19 +0000 | [diff] [blame] | 224 | close(wsi->sock); |
Andy Green | 9659f37 | 2011-01-27 22:01:43 +0000 | [diff] [blame] | 225 | fprintf(stderr, "ERROR from proxy: %s\n", pkt); |
Andy Green | 02244bb | 2011-01-28 09:01:19 +0000 | [diff] [blame] | 226 | goto bail1; |
Andy Green | 9659f37 | 2011-01-27 22:01:43 +0000 | [diff] [blame] | 227 | } |
| 228 | |
| 229 | /* we can just start sending to proxy */ |
| 230 | } |
| 231 | |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 232 | #ifdef LWS_OPENSSL_SUPPORT |
| 233 | if (ssl_connection) { |
| 234 | |
| 235 | wsi->ssl = SSL_new(this->ssl_client_ctx); |
| 236 | wsi->client_bio = BIO_new_socket(wsi->sock, BIO_NOCLOSE); |
| 237 | SSL_set_bio(wsi->ssl, wsi->client_bio, wsi->client_bio); |
| 238 | |
| 239 | if (SSL_connect(wsi->ssl) <= 0) { |
| 240 | fprintf(stderr, "SSL connect error %s\n", |
| 241 | ERR_error_string(ERR_get_error(), ssl_err_buf)); |
Andy Green | 9659f37 | 2011-01-27 22:01:43 +0000 | [diff] [blame] | 242 | goto bail1; |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 243 | } |
| 244 | |
| 245 | n = SSL_get_verify_result(wsi->ssl); |
| 246 | if (n != X509_V_OK) { |
Andy Green | 9659f37 | 2011-01-27 22:01:43 +0000 | [diff] [blame] | 247 | if (n != X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT || |
| 248 | ssl_connection != 2) { |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 249 | |
Andy Green | 9659f37 | 2011-01-27 22:01:43 +0000 | [diff] [blame] | 250 | fprintf(stderr, "server's cert didn't " |
| 251 | "look good %d\n", n); |
| 252 | goto bail2; |
| 253 | } |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 254 | } |
Andy Green | 9659f37 | 2011-01-27 22:01:43 +0000 | [diff] [blame] | 255 | } else { |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 256 | wsi->ssl = NULL; |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 257 | #endif |
Andy Green | 9659f37 | 2011-01-27 22:01:43 +0000 | [diff] [blame] | 258 | |
| 259 | |
| 260 | #ifdef LWS_OPENSSL_SUPPORT |
| 261 | } |
| 262 | #endif |
| 263 | |
Andy Green | 6964bb5 | 2011-01-23 16:50:33 +0000 | [diff] [blame] | 264 | /* |
| 265 | * create the random key |
| 266 | */ |
Andy Green | 4739e5c | 2011-01-22 12:51:57 +0000 | [diff] [blame] | 267 | |
| 268 | fd = open(SYSTEM_RANDOM_FILEPATH, O_RDONLY); |
| 269 | if (fd < 1) { |
| 270 | fprintf(stderr, "Unable to open random device %s\n", |
| 271 | SYSTEM_RANDOM_FILEPATH); |
| 272 | goto bail2; |
| 273 | } |
| 274 | n = read(fd, hash, 16); |
| 275 | if (n != 16) { |
| 276 | fprintf(stderr, "Unable to read from random device %s\n", |
| 277 | SYSTEM_RANDOM_FILEPATH); |
| 278 | close(fd); |
| 279 | goto bail2; |
| 280 | } |
| 281 | close(fd); |
| 282 | |
Andy Green | 6964bb5 | 2011-01-23 16:50:33 +0000 | [diff] [blame] | 283 | lws_b64_encode_string(hash, 16, key_b64, sizeof key_b64); |
Andy Green | 4739e5c | 2011-01-22 12:51:57 +0000 | [diff] [blame] | 284 | |
| 285 | /* |
| 286 | * 04 example client handshake |
| 287 | * |
| 288 | * GET /chat HTTP/1.1 |
| 289 | * Host: server.example.com |
| 290 | * Upgrade: websocket |
| 291 | * Connection: Upgrade |
| 292 | * Sec-WebSocket-Key: dGhlIHNhbXBsZSBub25jZQ== |
| 293 | * Sec-WebSocket-Origin: http://example.com |
| 294 | * Sec-WebSocket-Protocol: chat, superchat |
| 295 | * Sec-WebSocket-Version: 4 |
| 296 | */ |
| 297 | |
| 298 | p += sprintf(p, "GET %s HTTP/1.1\x0d\x0a", path); |
| 299 | p += sprintf(p, "Host: %s\x0d\x0a", host); |
| 300 | p += sprintf(p, "Upgrade: websocket\x0d\x0a"); |
| 301 | p += sprintf(p, "Connection: Upgrade\x0d\x0aSec-WebSocket-Key: "); |
| 302 | strcpy(p, key_b64); |
| 303 | p += strlen(key_b64); |
| 304 | p += sprintf(p, "\x0d\x0aSec-WebSocket-Origin: %s\x0d\x0a", origin); |
| 305 | if (protocol != NULL) |
| 306 | p += sprintf(p, "Sec-WebSocket-Protocol: %s\x0d\x0a", protocol); |
| 307 | p += sprintf(p, "Sec-WebSocket-Version: 4\x0d\x0a\x0d\x0a"); |
| 308 | |
| 309 | |
| 310 | /* prepare the expected server accept response */ |
| 311 | |
| 312 | strcpy(buf, key_b64); |
| 313 | strcpy(&buf[strlen(buf)], magic_websocket_guid); |
| 314 | |
| 315 | SHA1((unsigned char *)buf, strlen(buf), (unsigned char *)hash); |
| 316 | |
| 317 | lws_b64_encode_string(hash, 20, wsi->initial_handshake_hash_base64, |
| 318 | sizeof wsi->initial_handshake_hash_base64); |
| 319 | |
| 320 | /* send our request to the server */ |
| 321 | |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 322 | #ifdef LWS_OPENSSL_SUPPORT |
| 323 | if (ssl_connection) |
| 324 | n = SSL_write(wsi->ssl, pkt, p - pkt); |
| 325 | else |
| 326 | #endif |
| 327 | n = send(wsi->sock, pkt, p - pkt, 0); |
| 328 | |
| 329 | if (n < 0) { |
| 330 | fprintf(stderr, "ERROR writing to client socket\n"); |
| 331 | goto bail2; |
| 332 | } |
Andy Green | 4739e5c | 2011-01-22 12:51:57 +0000 | [diff] [blame] | 333 | |
| 334 | wsi->parser_state = WSI_TOKEN_NAME_PART; |
| 335 | |
| 336 | pfd.fd = wsi->sock; |
| 337 | pfd.events = POLLIN; |
| 338 | pfd.revents = 0; |
| 339 | |
| 340 | n = poll(&pfd, 1, 5000); |
| 341 | if (n < 0) { |
| 342 | fprintf(stderr, "libwebsocket_client_handshake socket error " |
| 343 | "while waiting for handshake response"); |
| 344 | goto bail2; |
| 345 | } |
| 346 | if (n == 0) { |
| 347 | fprintf(stderr, "libwebsocket_client_handshake timeout " |
| 348 | "while waiting for handshake response"); |
| 349 | goto bail2; |
| 350 | } |
| 351 | |
| 352 | /* interpret the server response */ |
| 353 | |
| 354 | /* |
| 355 | * HTTP/1.1 101 Switching Protocols |
| 356 | * Upgrade: websocket |
| 357 | * Connection: Upgrade |
| 358 | * Sec-WebSocket-Accept: me89jWimTRKTWwrS3aRrL53YZSo= |
| 359 | * Sec-WebSocket-Nonce: AQIDBAUGBwgJCgsMDQ4PEC== |
| 360 | * Sec-WebSocket-Protocol: chat |
| 361 | */ |
| 362 | |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 363 | #ifdef LWS_OPENSSL_SUPPORT |
| 364 | if (ssl_connection) |
| 365 | len = SSL_read(wsi->ssl, pkt, sizeof pkt); |
| 366 | else |
| 367 | #endif |
| 368 | len = recv(wsi->sock, pkt, sizeof pkt, 0); |
| 369 | |
Andy Green | 4739e5c | 2011-01-22 12:51:57 +0000 | [diff] [blame] | 370 | if (len < 0) { |
| 371 | fprintf(stderr, "libwebsocket_client_handshake read error\n"); |
| 372 | goto bail2; |
| 373 | } |
| 374 | |
| 375 | p = pkt; |
| 376 | for (n = 0; n < len; n++) |
| 377 | libwebsocket_parse(wsi, *p++); |
| 378 | |
| 379 | if (wsi->parser_state != WSI_PARSING_COMPLETE) { |
| 380 | fprintf(stderr, "libwebsocket_client_handshake server response" |
| 381 | " failed parsing\n"); |
| 382 | goto bail2; |
| 383 | } |
| 384 | |
| 385 | /* |
| 386 | * well, what the server sent looked reasonable for syntax. |
| 387 | * Now let's confirm it sent all the necessary headers |
| 388 | */ |
| 389 | |
| 390 | if (!wsi->utf8_token[WSI_TOKEN_HTTP].token_len || |
| 391 | !wsi->utf8_token[WSI_TOKEN_UPGRADE].token_len || |
| 392 | !wsi->utf8_token[WSI_TOKEN_CONNECTION].token_len || |
| 393 | !wsi->utf8_token[WSI_TOKEN_ACCEPT].token_len || |
| 394 | !wsi->utf8_token[WSI_TOKEN_NONCE].token_len || |
| 395 | (!wsi->utf8_token[WSI_TOKEN_PROTOCOL].token_len && |
| 396 | protocol != NULL)) { |
| 397 | fprintf(stderr, "libwebsocket_client_handshake " |
| 398 | "missing required header\n"); |
| 399 | goto bail2; |
| 400 | } |
| 401 | |
| 402 | /* |
| 403 | * Everything seems to be there, now take a closer look at what is in |
| 404 | * each header |
| 405 | */ |
| 406 | |
| 407 | strtolower(wsi->utf8_token[WSI_TOKEN_HTTP].token); |
| 408 | if (strcmp(wsi->utf8_token[WSI_TOKEN_HTTP].token, |
| 409 | "101 switching protocols")) { |
| 410 | fprintf(stderr, "libwebsocket_client_handshake server sent bad" |
| 411 | " HTTP response '%s'\n", |
| 412 | wsi->utf8_token[WSI_TOKEN_HTTP].token); |
| 413 | goto bail2; |
| 414 | } |
| 415 | |
| 416 | strtolower(wsi->utf8_token[WSI_TOKEN_UPGRADE].token); |
| 417 | if (strcmp(wsi->utf8_token[WSI_TOKEN_UPGRADE].token, "websocket")) { |
| 418 | fprintf(stderr, "libwebsocket_client_handshake server sent bad" |
| 419 | " Upgrade header '%s'\n", |
| 420 | wsi->utf8_token[WSI_TOKEN_UPGRADE].token); |
| 421 | goto bail2; |
Andy Green | 6964bb5 | 2011-01-23 16:50:33 +0000 | [diff] [blame] | 422 | } |
Andy Green | 4739e5c | 2011-01-22 12:51:57 +0000 | [diff] [blame] | 423 | |
| 424 | strtolower(wsi->utf8_token[WSI_TOKEN_CONNECTION].token); |
| 425 | if (strcmp(wsi->utf8_token[WSI_TOKEN_CONNECTION].token, "upgrade")) { |
| 426 | fprintf(stderr, "libwebsocket_client_handshake server sent bad" |
| 427 | " Connection hdr '%s'\n", |
| 428 | wsi->utf8_token[WSI_TOKEN_CONNECTION].token); |
| 429 | goto bail2; |
| 430 | } |
| 431 | /* |
| 432 | * confirm the protocol the server wants to talk was in the list of |
| 433 | * protocols we offered |
| 434 | */ |
| 435 | |
| 436 | if (!wsi->utf8_token[WSI_TOKEN_PROTOCOL].token_len) { |
| 437 | |
| 438 | /* no protocol name to work from, default to first protocol */ |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 439 | wsi->protocol = &this->protocols[0]; |
Andy Green | 4739e5c | 2011-01-22 12:51:57 +0000 | [diff] [blame] | 440 | |
| 441 | goto check_accept; |
| 442 | } |
| 443 | |
| 444 | pc = protocol; |
| 445 | while (*pc && !okay) { |
| 446 | if ((!strncmp(pc, wsi->utf8_token[WSI_TOKEN_PROTOCOL].token, |
| 447 | wsi->utf8_token[WSI_TOKEN_PROTOCOL].token_len)) && |
| 448 | (pc[wsi->utf8_token[WSI_TOKEN_PROTOCOL].token_len] == ',' || |
| 449 | pc[wsi->utf8_token[WSI_TOKEN_PROTOCOL].token_len] == '\0')) { |
| 450 | okay = 1; |
| 451 | continue; |
| 452 | } |
| 453 | while (*pc && *pc != ',') |
| 454 | pc++; |
| 455 | while (*pc && *pc != ' ') |
| 456 | pc++; |
| 457 | } |
| 458 | if (!okay) { |
| 459 | fprintf(stderr, "libwebsocket_client_handshake server " |
| 460 | "sent bad protocol '%s'\n", |
| 461 | wsi->utf8_token[WSI_TOKEN_PROTOCOL].token); |
| 462 | goto bail2; |
| 463 | } |
| 464 | |
| 465 | /* |
| 466 | * identify the selected protocol struct and set it |
| 467 | */ |
| 468 | n = 0; |
| 469 | wsi->protocol = NULL; |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 470 | while (this->protocols[n].callback) { |
Andy Green | 4739e5c | 2011-01-22 12:51:57 +0000 | [diff] [blame] | 471 | if (strcmp(wsi->utf8_token[WSI_TOKEN_PROTOCOL].token, |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 472 | this->protocols[n].name) == 0) |
| 473 | wsi->protocol = &this->protocols[n]; |
Andy Green | 4739e5c | 2011-01-22 12:51:57 +0000 | [diff] [blame] | 474 | n++; |
| 475 | } |
| 476 | |
| 477 | if (wsi->protocol == NULL) { |
| 478 | fprintf(stderr, "libwebsocket_client_handshake server " |
| 479 | "requested protocol '%s', which we " |
| 480 | "said we supported but we don't!\n", |
| 481 | wsi->utf8_token[WSI_TOKEN_PROTOCOL].token); |
| 482 | goto bail2; |
| 483 | } |
| 484 | |
| 485 | check_accept: |
| 486 | /* |
| 487 | * Confirm his accept token is the same as the one we precomputed |
| 488 | */ |
| 489 | |
| 490 | if (strcmp(wsi->utf8_token[WSI_TOKEN_ACCEPT].token, |
| 491 | wsi->initial_handshake_hash_base64)) { |
| 492 | fprintf(stderr, "libwebsocket_client_handshake server sent " |
| 493 | "bad ACCEPT '%s' vs computed '%s'\n", |
| 494 | wsi->utf8_token[WSI_TOKEN_ACCEPT].token, |
| 495 | wsi->initial_handshake_hash_base64); |
| 496 | goto bail2; |
| 497 | } |
| 498 | |
| 499 | /* |
| 500 | * Calculate the masking key to use when sending data to server |
| 501 | */ |
| 502 | |
| 503 | strcpy(buf, key_b64); |
| 504 | p = buf + strlen(key_b64); |
| 505 | strcpy(p, wsi->utf8_token[WSI_TOKEN_NONCE].token); |
| 506 | p += wsi->utf8_token[WSI_TOKEN_NONCE].token_len; |
| 507 | strcpy(p, magic_websocket_04_masking_guid); |
| 508 | SHA1((unsigned char *)buf, strlen(buf), wsi->masking_key_04); |
| 509 | |
| 510 | /* okay he is good to go */ |
| 511 | |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 512 | this->fds[this->fds_count].fd = wsi->sock; |
| 513 | this->fds[this->fds_count].revents = 0; |
| 514 | this->fds[this->fds_count++].events = POLLIN; |
Andy Green | 4739e5c | 2011-01-22 12:51:57 +0000 | [diff] [blame] | 515 | |
| 516 | wsi->state = WSI_STATE_ESTABLISHED; |
| 517 | wsi->client_mode = 1; |
| 518 | |
| 519 | fprintf(stderr, "handshake OK for protocol %s\n", wsi->protocol->name); |
| 520 | |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 521 | /* call him back to inform him he is up */ |
| 522 | |
| 523 | wsi->protocol->callback(wsi, |
| 524 | LWS_CALLBACK_CLIENT_ESTABLISHED, |
| 525 | wsi->user_space, |
| 526 | NULL, 0); |
Andy Green | 4739e5c | 2011-01-22 12:51:57 +0000 | [diff] [blame] | 527 | return wsi; |
| 528 | |
| 529 | |
| 530 | bail2: |
| 531 | libwebsocket_client_close(wsi); |
| 532 | bail1: |
| 533 | free(wsi); |
| 534 | |
| 535 | return NULL; |
| 536 | } |