Andy Green | 58eaa74 | 2011-03-07 17:54:06 +0000 | [diff] [blame] | 1 | /* |
Andy Green | a0da8a8 | 2010-11-08 17:12:19 +0000 | [diff] [blame] | 2 | * libwebsockets - small server side websockets and web server implementation |
Andy Green | 8f037e4 | 2010-12-19 22:13:26 +0000 | [diff] [blame] | 3 | * |
Andy Green | a0da8a8 | 2010-11-08 17:12:19 +0000 | [diff] [blame] | 4 | * Copyright (C) 2010 Andy Green <andy@warmcat.com> |
| 5 | * |
| 6 | * This library is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU Lesser General Public |
| 8 | * License as published by the Free Software Foundation: |
| 9 | * version 2.1 of the License. |
| 10 | * |
| 11 | * This library 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 GNU |
| 14 | * Lesser General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU Lesser General Public |
| 17 | * License along with this library; if not, write to the Free Software |
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, |
| 19 | * MA 02110-1301 USA |
Andy Green | 05a0a7b | 2010-10-31 17:51:39 +0000 | [diff] [blame] | 20 | */ |
| 21 | |
Andy Green | 7c212cc | 2010-11-08 20:20:42 +0000 | [diff] [blame] | 22 | #include "private-libwebsockets.h" |
Andy Green | ff95d7a | 2010-10-28 22:36:01 +0100 | [diff] [blame] | 23 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 24 | #ifdef WIN32 |
| 25 | |
| 26 | #else |
| 27 | #include <ifaddrs.h> |
| 28 | #endif |
Andy Green | 2e24da0 | 2011-03-05 16:12:04 +0000 | [diff] [blame] | 29 | |
| 30 | #ifdef LWS_OPENSSL_SUPPORT |
| 31 | int openssl_websocket_private_data_index; |
| 32 | #endif |
| 33 | |
Andy Green | be93fef | 2011-02-14 20:25:43 +0000 | [diff] [blame] | 34 | /* |
| 35 | * In-place str to lower case |
| 36 | */ |
| 37 | |
| 38 | static void |
| 39 | strtolower(char *s) |
| 40 | { |
| 41 | while (*s) { |
| 42 | *s = tolower(*s); |
| 43 | s++; |
| 44 | } |
| 45 | } |
| 46 | |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 47 | /* file descriptor hash management */ |
| 48 | |
| 49 | struct libwebsocket * |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 50 | wsi_from_fd(struct libwebsocket_context *context, int fd) |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 51 | { |
| 52 | int h = LWS_FD_HASH(fd); |
| 53 | int n = 0; |
| 54 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 55 | for (n = 0; n < context->fd_hashtable[h].length; n++) |
| 56 | if (context->fd_hashtable[h].wsi[n]->sock == fd) |
| 57 | return context->fd_hashtable[h].wsi[n]; |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 58 | |
| 59 | return NULL; |
| 60 | } |
| 61 | |
| 62 | int |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 63 | insert_wsi(struct libwebsocket_context *context, struct libwebsocket *wsi) |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 64 | { |
| 65 | int h = LWS_FD_HASH(wsi->sock); |
| 66 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 67 | if (context->fd_hashtable[h].length == MAX_CLIENTS - 1) { |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 68 | fprintf(stderr, "hash table overflow\n"); |
| 69 | return 1; |
| 70 | } |
| 71 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 72 | context->fd_hashtable[h].wsi[context->fd_hashtable[h].length++] = wsi; |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 73 | |
| 74 | return 0; |
| 75 | } |
| 76 | |
| 77 | int |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 78 | delete_from_fd(struct libwebsocket_context *context, int fd) |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 79 | { |
| 80 | int h = LWS_FD_HASH(fd); |
| 81 | int n = 0; |
| 82 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 83 | for (n = 0; n < context->fd_hashtable[h].length; n++) |
| 84 | if (context->fd_hashtable[h].wsi[n]->sock == fd) { |
| 85 | while (n < context->fd_hashtable[h].length) { |
| 86 | context->fd_hashtable[h].wsi[n] = |
| 87 | context->fd_hashtable[h].wsi[n + 1]; |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 88 | n++; |
| 89 | } |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 90 | context->fd_hashtable[h].length--; |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 91 | |
| 92 | return 0; |
| 93 | } |
| 94 | |
| 95 | fprintf(stderr, "Failed to find fd %d requested for " |
| 96 | "delete in hashtable\n", fd); |
| 97 | return 1; |
| 98 | } |
| 99 | |
Andy Green | 1f9bf52 | 2011-02-14 21:14:37 +0000 | [diff] [blame] | 100 | #ifdef LWS_OPENSSL_SUPPORT |
| 101 | static void |
| 102 | libwebsockets_decode_ssl_error(void) |
| 103 | { |
| 104 | char buf[256]; |
| 105 | u_long err; |
| 106 | |
| 107 | while ((err = ERR_get_error()) != 0) { |
| 108 | ERR_error_string_n(err, buf, sizeof(buf)); |
| 109 | fprintf(stderr, "*** %s\n", buf); |
| 110 | } |
| 111 | } |
| 112 | #endif |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 113 | |
Andy Green | 32375b7 | 2011-02-19 08:32:53 +0000 | [diff] [blame] | 114 | |
| 115 | static int |
| 116 | interface_to_sa(const char* ifname, struct sockaddr_in *addr, size_t addrlen) |
| 117 | { |
| 118 | int rc = -1; |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 119 | #ifdef WIN32 |
| 120 | // TODO |
| 121 | #else |
Andy Green | 32375b7 | 2011-02-19 08:32:53 +0000 | [diff] [blame] | 122 | struct ifaddrs *ifr; |
| 123 | struct ifaddrs *ifc; |
| 124 | struct sockaddr_in *sin; |
| 125 | |
| 126 | getifaddrs(&ifr); |
| 127 | for (ifc = ifr; ifc != NULL; ifc = ifc->ifa_next) { |
| 128 | if (strcmp(ifc->ifa_name, ifname)) |
| 129 | continue; |
| 130 | if (ifc->ifa_addr == NULL) |
| 131 | continue; |
| 132 | sin = (struct sockaddr_in *)ifc->ifa_addr; |
| 133 | if (sin->sin_family != AF_INET) |
| 134 | continue; |
| 135 | memcpy(addr, sin, addrlen); |
| 136 | rc = 0; |
| 137 | } |
| 138 | |
| 139 | freeifaddrs(ifr); |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 140 | #endif |
Andy Green | 32375b7 | 2011-02-19 08:32:53 +0000 | [diff] [blame] | 141 | return rc; |
| 142 | } |
| 143 | |
Andy Green | 8f037e4 | 2010-12-19 22:13:26 +0000 | [diff] [blame] | 144 | void |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 145 | libwebsocket_close_and_free_session(struct libwebsocket_context *context, |
Andy Green | 687b018 | 2011-02-26 11:04:01 +0000 | [diff] [blame] | 146 | struct libwebsocket *wsi, enum lws_close_status reason) |
Andy Green | 251f6fa | 2010-11-03 11:13:06 +0000 | [diff] [blame] | 147 | { |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 148 | int n; |
Andy Green | 62c54d2 | 2011-02-14 09:14:25 +0000 | [diff] [blame] | 149 | int old_state; |
Andy Green | 5e1fa17 | 2011-02-10 09:07:05 +0000 | [diff] [blame] | 150 | unsigned char buf[LWS_SEND_BUFFER_PRE_PADDING + 2 + |
| 151 | LWS_SEND_BUFFER_POST_PADDING]; |
Andy Green | c44159f | 2011-03-07 07:08:18 +0000 | [diff] [blame] | 152 | int ret; |
| 153 | int m; |
| 154 | struct lws_tokens eff_buf; |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 155 | |
Andy Green | 4b6fbe1 | 2011-02-14 08:03:48 +0000 | [diff] [blame] | 156 | if (!wsi) |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 157 | return; |
| 158 | |
Andy Green | 62c54d2 | 2011-02-14 09:14:25 +0000 | [diff] [blame] | 159 | old_state = wsi->state; |
Andy Green | 251f6fa | 2010-11-03 11:13:06 +0000 | [diff] [blame] | 160 | |
Andy Green | 62c54d2 | 2011-02-14 09:14:25 +0000 | [diff] [blame] | 161 | if (old_state == WSI_STATE_DEAD_SOCKET) |
Andy Green | 5e1fa17 | 2011-02-10 09:07:05 +0000 | [diff] [blame] | 162 | return; |
| 163 | |
Andy Green | da527df | 2011-03-07 07:08:12 +0000 | [diff] [blame] | 164 | wsi->close_reason = reason; |
| 165 | |
| 166 | /* |
Andy Green | c44159f | 2011-03-07 07:08:18 +0000 | [diff] [blame] | 167 | * flush any tx pending from extensions, since we may send close packet |
| 168 | * if there are problems with send, just nuke the connection |
| 169 | */ |
| 170 | |
| 171 | ret = 1; |
| 172 | while (ret == 1) { |
| 173 | |
| 174 | /* default to nobody has more to spill */ |
| 175 | |
| 176 | ret = 0; |
| 177 | eff_buf.token = NULL; |
| 178 | eff_buf.token_len = 0; |
| 179 | |
| 180 | /* show every extension the new incoming data */ |
| 181 | |
| 182 | for (n = 0; n < wsi->count_active_extensions; n++) { |
| 183 | m = wsi->active_extensions[n]->callback( |
| 184 | wsi->protocol->owning_server, wsi, |
| 185 | LWS_EXT_CALLBACK_FLUSH_PENDING_TX, |
| 186 | wsi->active_extensions_user[n], &eff_buf, 0); |
| 187 | if (m < 0) { |
| 188 | fprintf(stderr, "Extension reports " |
| 189 | "fatal error\n"); |
| 190 | goto just_kill_connection; |
| 191 | } |
| 192 | if (m) |
| 193 | /* |
| 194 | * at least one extension told us he has more |
| 195 | * to spill, so we will go around again after |
| 196 | */ |
| 197 | ret = 1; |
| 198 | } |
| 199 | |
| 200 | /* assuming they left us something to send, send it */ |
| 201 | |
| 202 | if (eff_buf.token_len) |
| 203 | if (lws_issue_raw(wsi, (unsigned char *)eff_buf.token, |
| 204 | eff_buf.token_len)) |
| 205 | goto just_kill_connection; |
| 206 | } |
| 207 | |
| 208 | /* |
Andy Green | da527df | 2011-03-07 07:08:12 +0000 | [diff] [blame] | 209 | * signal we are closing, libsocket_write will |
| 210 | * add any necessary version-specific stuff. If the write fails, |
| 211 | * no worries we are closing anyway. If we didn't initiate this |
| 212 | * close, then our state has been changed to |
| 213 | * WSI_STATE_RETURNED_CLOSE_ALREADY and we will skip this. |
| 214 | * |
| 215 | * Likewise if it's a second call to close this connection after we |
| 216 | * sent the close indication to the peer already, we are in state |
| 217 | * WSI_STATE_AWAITING_CLOSE_ACK and will skip doing this a second time. |
| 218 | */ |
| 219 | |
| 220 | if (old_state == WSI_STATE_ESTABLISHED && |
| 221 | reason != LWS_CLOSE_STATUS_NOSTATUS) { |
| 222 | n = libwebsocket_write(wsi, &buf[LWS_SEND_BUFFER_PRE_PADDING], |
| 223 | 0, LWS_WRITE_CLOSE); |
| 224 | if (!n) { |
| 225 | /* |
| 226 | * we have sent a nice protocol level indication we |
| 227 | * now wish to close, we should not send anything more |
| 228 | */ |
| 229 | |
| 230 | wsi->state = WSI_STATE_AWAITING_CLOSE_ACK; |
| 231 | |
| 232 | /* and we should wait for a reply for a bit */ |
| 233 | |
| 234 | libwebsocket_set_timeout(wsi, |
| 235 | PENDING_TIMEOUT_CLOSE_ACK, 5); |
| 236 | |
| 237 | fprintf(stderr, "sent close indication, awaiting ack\n"); |
| 238 | |
| 239 | return; |
| 240 | } |
| 241 | |
| 242 | /* else, the send failed and we should just hang up */ |
| 243 | } |
| 244 | |
Andy Green | c44159f | 2011-03-07 07:08:18 +0000 | [diff] [blame] | 245 | just_kill_connection: |
Andy Green | da527df | 2011-03-07 07:08:12 +0000 | [diff] [blame] | 246 | /* |
| 247 | * we won't be servicing or receiving anything further from this guy |
| 248 | * remove this fd from wsi mapping hashtable |
| 249 | */ |
Andy Green | 4b6fbe1 | 2011-02-14 08:03:48 +0000 | [diff] [blame] | 250 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 251 | delete_from_fd(context, wsi->sock); |
Andy Green | 4b6fbe1 | 2011-02-14 08:03:48 +0000 | [diff] [blame] | 252 | |
| 253 | /* delete it from the internal poll list if still present */ |
| 254 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 255 | for (n = 0; n < context->fds_count; n++) { |
| 256 | if (context->fds[n].fd != wsi->sock) |
Andy Green | 4b6fbe1 | 2011-02-14 08:03:48 +0000 | [diff] [blame] | 257 | continue; |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 258 | while (n < context->fds_count - 1) { |
| 259 | context->fds[n] = context->fds[n + 1]; |
Andy Green | 4b6fbe1 | 2011-02-14 08:03:48 +0000 | [diff] [blame] | 260 | n++; |
| 261 | } |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 262 | context->fds_count--; |
Andy Green | 4b6fbe1 | 2011-02-14 08:03:48 +0000 | [diff] [blame] | 263 | /* we only have to deal with one */ |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 264 | n = context->fds_count; |
Andy Green | 4b6fbe1 | 2011-02-14 08:03:48 +0000 | [diff] [blame] | 265 | } |
| 266 | |
| 267 | /* remove also from external POLL support via protocol 0 */ |
| 268 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 269 | context->protocols[0].callback(context, wsi, |
Andy Green | 4b6fbe1 | 2011-02-14 08:03:48 +0000 | [diff] [blame] | 270 | LWS_CALLBACK_DEL_POLL_FD, (void *)(long)wsi->sock, NULL, 0); |
| 271 | |
Andy Green | 251f6fa | 2010-11-03 11:13:06 +0000 | [diff] [blame] | 272 | wsi->state = WSI_STATE_DEAD_SOCKET; |
| 273 | |
Andy Green | 4b6fbe1 | 2011-02-14 08:03:48 +0000 | [diff] [blame] | 274 | /* tell the user it's all over for this guy */ |
| 275 | |
Andy Green | d430273 | 2011-02-28 07:45:29 +0000 | [diff] [blame] | 276 | if (wsi->protocol && wsi->protocol->callback && |
| 277 | old_state == WSI_STATE_ESTABLISHED) |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 278 | wsi->protocol->callback(context, wsi, LWS_CALLBACK_CLOSED, |
Andy Green | e77ddd8 | 2010-11-13 10:03:47 +0000 | [diff] [blame] | 279 | wsi->user_space, NULL, 0); |
Andy Green | 251f6fa | 2010-11-03 11:13:06 +0000 | [diff] [blame] | 280 | |
Andy Green | ef660a9 | 2011-03-06 10:29:38 +0000 | [diff] [blame] | 281 | /* deallocate any active extension contexts */ |
| 282 | |
| 283 | for (n = 0; n < wsi->count_active_extensions; n++) { |
| 284 | if (!wsi->active_extensions[n]->callback) |
| 285 | continue; |
| 286 | |
| 287 | wsi->active_extensions[n]->callback(context, wsi, |
| 288 | LWS_EXT_CALLBACK_DESTROY, |
| 289 | wsi->active_extensions_user[n], NULL, 0); |
| 290 | |
| 291 | free(wsi->active_extensions_user[n]); |
| 292 | } |
| 293 | |
| 294 | /* free up his parsing allocations */ |
Andy Green | 4b6fbe1 | 2011-02-14 08:03:48 +0000 | [diff] [blame] | 295 | |
Andy Green | 251f6fa | 2010-11-03 11:13:06 +0000 | [diff] [blame] | 296 | for (n = 0; n < WSI_TOKEN_COUNT; n++) |
| 297 | if (wsi->utf8_token[n].token) |
| 298 | free(wsi->utf8_token[n].token); |
| 299 | |
Andy Green | 0ca6a17 | 2010-12-19 20:50:01 +0000 | [diff] [blame] | 300 | /* fprintf(stderr, "closing fd=%d\n", wsi->sock); */ |
Andy Green | 251f6fa | 2010-11-03 11:13:06 +0000 | [diff] [blame] | 301 | |
Andy Green | 3faa9c7 | 2010-11-08 17:03:03 +0000 | [diff] [blame] | 302 | #ifdef LWS_OPENSSL_SUPPORT |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 303 | if (wsi->ssl) { |
Andy Green | 3faa9c7 | 2010-11-08 17:03:03 +0000 | [diff] [blame] | 304 | n = SSL_get_fd(wsi->ssl); |
| 305 | SSL_shutdown(wsi->ssl); |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 306 | #ifdef WIN32 |
| 307 | closesocket(n); |
| 308 | #else |
Andy Green | 3faa9c7 | 2010-11-08 17:03:03 +0000 | [diff] [blame] | 309 | close(n); |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 310 | #endif |
Andy Green | 3faa9c7 | 2010-11-08 17:03:03 +0000 | [diff] [blame] | 311 | SSL_free(wsi->ssl); |
| 312 | } else { |
| 313 | #endif |
| 314 | shutdown(wsi->sock, SHUT_RDWR); |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 315 | #ifdef WIN32 |
| 316 | closesocket(wsi->sock); |
| 317 | #else |
Andy Green | 3faa9c7 | 2010-11-08 17:03:03 +0000 | [diff] [blame] | 318 | close(wsi->sock); |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 319 | #endif |
Andy Green | 3faa9c7 | 2010-11-08 17:03:03 +0000 | [diff] [blame] | 320 | #ifdef LWS_OPENSSL_SUPPORT |
| 321 | } |
| 322 | #endif |
Andy Green | 4f3943a | 2010-11-12 10:44:16 +0000 | [diff] [blame] | 323 | if (wsi->user_space) |
| 324 | free(wsi->user_space); |
| 325 | |
Andy Green | 251f6fa | 2010-11-03 11:13:06 +0000 | [diff] [blame] | 326 | free(wsi); |
| 327 | } |
| 328 | |
Andy Green | 0703409 | 2011-02-13 08:37:12 +0000 | [diff] [blame] | 329 | /** |
Andy Green | f7ee549 | 2011-02-13 09:04:21 +0000 | [diff] [blame] | 330 | * libwebsockets_hangup_on_client() - Server calls to terminate client |
| 331 | * connection |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 332 | * @context: libwebsockets context |
Andy Green | f7ee549 | 2011-02-13 09:04:21 +0000 | [diff] [blame] | 333 | * @fd: Connection socket descriptor |
| 334 | */ |
| 335 | |
| 336 | void |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 337 | libwebsockets_hangup_on_client(struct libwebsocket_context *context, int fd) |
Andy Green | f7ee549 | 2011-02-13 09:04:21 +0000 | [diff] [blame] | 338 | { |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 339 | struct libwebsocket *wsi = wsi_from_fd(context, fd); |
Andy Green | f7ee549 | 2011-02-13 09:04:21 +0000 | [diff] [blame] | 340 | |
| 341 | if (wsi == NULL) |
| 342 | return; |
| 343 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 344 | libwebsocket_close_and_free_session(context, wsi, |
Andy Green | 6da560c | 2011-02-26 11:06:27 +0000 | [diff] [blame] | 345 | LWS_CLOSE_STATUS_NOSTATUS); |
Andy Green | f7ee549 | 2011-02-13 09:04:21 +0000 | [diff] [blame] | 346 | } |
| 347 | |
| 348 | |
| 349 | /** |
Andy Green | 0703409 | 2011-02-13 08:37:12 +0000 | [diff] [blame] | 350 | * libwebsockets_get_peer_addresses() - Get client address information |
| 351 | * @fd: Connection socket descriptor |
| 352 | * @name: Buffer to take client address name |
| 353 | * @name_len: Length of client address name buffer |
| 354 | * @rip: Buffer to take client address IP qotted quad |
| 355 | * @rip_len: Length of client address IP buffer |
| 356 | * |
| 357 | * This function fills in @name and @rip with the name and IP of |
| 358 | * the client connected with socket descriptor @fd. Names may be |
| 359 | * truncated if there is not enough room. If either cannot be |
| 360 | * determined, they will be returned as valid zero-length strings. |
| 361 | */ |
| 362 | |
| 363 | void |
| 364 | libwebsockets_get_peer_addresses(int fd, char *name, int name_len, |
| 365 | char *rip, int rip_len) |
| 366 | { |
| 367 | unsigned int len; |
| 368 | struct sockaddr_in sin; |
| 369 | struct hostent *host; |
| 370 | struct hostent *host1; |
| 371 | char ip[128]; |
| 372 | char *p; |
| 373 | int n; |
| 374 | |
| 375 | rip[0] = '\0'; |
| 376 | name[0] = '\0'; |
| 377 | |
| 378 | len = sizeof sin; |
| 379 | if (getpeername(fd, (struct sockaddr *) &sin, &len) < 0) { |
| 380 | perror("getpeername"); |
| 381 | return; |
| 382 | } |
| 383 | |
| 384 | host = gethostbyaddr((char *) &sin.sin_addr, sizeof sin.sin_addr, |
| 385 | AF_INET); |
| 386 | if (host == NULL) { |
| 387 | perror("gethostbyaddr"); |
| 388 | return; |
| 389 | } |
| 390 | |
| 391 | strncpy(name, host->h_name, name_len); |
| 392 | name[name_len - 1] = '\0'; |
| 393 | |
| 394 | host1 = gethostbyname(host->h_name); |
| 395 | if (host1 == NULL) |
| 396 | return; |
| 397 | p = (char *)host1; |
| 398 | n = 0; |
| 399 | while (p != NULL) { |
| 400 | p = host1->h_addr_list[n++]; |
| 401 | if (p == NULL) |
| 402 | continue; |
| 403 | if (host1->h_addrtype != AF_INET) |
| 404 | continue; |
| 405 | |
| 406 | sprintf(ip, "%d.%d.%d.%d", |
| 407 | p[0], p[1], p[2], p[3]); |
| 408 | p = NULL; |
| 409 | strncpy(rip, ip, rip_len); |
| 410 | rip[rip_len - 1] = '\0'; |
| 411 | } |
| 412 | } |
Andy Green | 9f99034 | 2011-02-12 11:57:45 +0000 | [diff] [blame] | 413 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 414 | int libwebsockets_get_random(struct libwebsocket_context *context, |
| 415 | void *buf, int len) |
| 416 | { |
| 417 | int n; |
| 418 | char *p = buf; |
| 419 | |
| 420 | #ifdef WIN32 |
| 421 | for (n = 0; n < len; n++) |
| 422 | p[n] = (unsigned char)rand(); |
| 423 | #else |
| 424 | n = read(context->fd_random, p, len); |
| 425 | #endif |
| 426 | |
| 427 | return n; |
| 428 | } |
| 429 | |
Andy Green | 2836c64 | 2011-03-07 20:47:41 +0000 | [diff] [blame] | 430 | unsigned char * |
| 431 | libwebsockets_SHA1(const unsigned char *d, size_t n, unsigned char *md) |
| 432 | { |
| 433 | return SHA1(d, n, md); |
| 434 | } |
| 435 | |
Andy Green | eeaacb3 | 2011-03-01 20:44:24 +0000 | [diff] [blame] | 436 | void libwebsockets_00_spaceout(char *key, int spaces, int seed) |
| 437 | { |
| 438 | char *p; |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 439 | |
Andy Green | eeaacb3 | 2011-03-01 20:44:24 +0000 | [diff] [blame] | 440 | key++; |
| 441 | while (spaces--) { |
| 442 | if (*key && (seed & 1)) |
| 443 | key++; |
| 444 | seed >>= 1; |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 445 | |
Andy Green | eeaacb3 | 2011-03-01 20:44:24 +0000 | [diff] [blame] | 446 | p = key + strlen(key); |
| 447 | while (p >= key) { |
| 448 | p[1] = p[0]; |
| 449 | p--; |
| 450 | } |
| 451 | *key++ = ' '; |
| 452 | } |
| 453 | } |
| 454 | |
| 455 | void libwebsockets_00_spam(char *key, int count, int seed) |
| 456 | { |
| 457 | char *p; |
| 458 | |
| 459 | key++; |
| 460 | while (count--) { |
| 461 | |
| 462 | if (*key && (seed & 1)) |
| 463 | key++; |
| 464 | seed >>= 1; |
| 465 | |
| 466 | p = key + strlen(key); |
| 467 | while (p >= key) { |
| 468 | p[1] = p[0]; |
| 469 | p--; |
| 470 | } |
| 471 | *key++ = 0x21 + ((seed & 0xffff) % 15); |
| 472 | /* 4 would use it up too fast.. not like it matters */ |
| 473 | seed >>= 1; |
| 474 | } |
| 475 | } |
| 476 | |
Andy Green | 95a7b5d | 2011-03-06 10:29:39 +0000 | [diff] [blame] | 477 | int lws_send_pipe_choked(struct libwebsocket *wsi) |
| 478 | { |
| 479 | struct pollfd fds; |
| 480 | |
| 481 | fds.fd = wsi->sock; |
| 482 | fds.events = POLLOUT; |
| 483 | fds.revents = 0; |
| 484 | |
| 485 | if (poll(&fds, 1, 0) != 1) |
| 486 | return 1; |
| 487 | |
| 488 | if ((fds.revents & POLLOUT) == 0) |
| 489 | return 1; |
| 490 | |
| 491 | /* okay to send another packet without blocking */ |
| 492 | |
| 493 | return 0; |
| 494 | } |
| 495 | |
Andy Green | 3b84c00 | 2011-03-06 13:14:42 +0000 | [diff] [blame] | 496 | static int |
| 497 | lws_handle_POLLOUT_event(struct libwebsocket_context *context, |
| 498 | struct libwebsocket *wsi, struct pollfd *pollfd) |
| 499 | { |
| 500 | struct lws_tokens eff_buf; |
| 501 | int n; |
| 502 | int ret; |
| 503 | int m; |
| 504 | |
| 505 | if (!wsi->extension_data_pending) |
| 506 | goto user_service; |
| 507 | |
| 508 | /* |
| 509 | * check in on the active extensions, see if they |
| 510 | * had pending stuff to spill... they need to get the |
| 511 | * first look-in otherwise sequence will be disordered |
| 512 | * |
| 513 | * NULL, zero-length eff_buf means just spill pending |
| 514 | */ |
| 515 | |
| 516 | ret = 1; |
| 517 | while (ret == 1) { |
| 518 | |
| 519 | /* default to nobody has more to spill */ |
| 520 | |
| 521 | ret = 0; |
| 522 | eff_buf.token = NULL; |
| 523 | eff_buf.token_len = 0; |
| 524 | |
| 525 | /* give every extension a chance to spill */ |
| 526 | |
| 527 | for (n = 0; n < wsi->count_active_extensions; n++) { |
| 528 | m = wsi->active_extensions[n]->callback( |
| 529 | wsi->protocol->owning_server, wsi, |
| 530 | LWS_EXT_CALLBACK_PACKET_TX_PRESEND, |
| 531 | wsi->active_extensions_user[n], &eff_buf, 0); |
| 532 | if (m < 0) { |
| 533 | fprintf(stderr, "extension reports fatal error\n"); |
| 534 | return -1; |
| 535 | } |
| 536 | if (m) |
| 537 | /* |
| 538 | * at least one extension told us he has more |
| 539 | * to spill, so we will go around again after |
| 540 | */ |
| 541 | ret = 1; |
| 542 | } |
| 543 | |
| 544 | /* assuming they gave us something to send, send it */ |
| 545 | |
| 546 | if (eff_buf.token_len) { |
| 547 | if (lws_issue_raw(wsi, (unsigned char *)eff_buf.token, |
| 548 | eff_buf.token_len)) |
| 549 | return -1; |
| 550 | } else |
| 551 | continue; |
| 552 | |
| 553 | /* no extension has more to spill */ |
| 554 | |
| 555 | if (!ret) |
| 556 | continue; |
| 557 | |
| 558 | /* |
| 559 | * There's more to spill from an extension, but we just sent |
| 560 | * something... did that leave the pipe choked? |
| 561 | */ |
| 562 | |
| 563 | if (!lws_send_pipe_choked(wsi)) |
| 564 | /* no we could add more */ |
| 565 | continue; |
| 566 | |
| 567 | fprintf(stderr, "choked in POLLOUT service\n"); |
| 568 | |
| 569 | /* |
| 570 | * Yes, he's choked. Leave the POLLOUT masked on so we will |
| 571 | * come back here when he is unchoked. Don't call the user |
| 572 | * callback to enforce ordering of spilling, he'll get called |
| 573 | * when we come back here and there's nothing more to spill. |
| 574 | */ |
| 575 | |
| 576 | return 0; |
| 577 | } |
| 578 | |
| 579 | wsi->extension_data_pending = 0; |
| 580 | |
| 581 | user_service: |
| 582 | /* one shot */ |
| 583 | |
| 584 | pollfd->events &= ~POLLOUT; |
| 585 | |
| 586 | /* external POLL support via protocol 0 */ |
| 587 | context->protocols[0].callback(context, wsi, |
| 588 | LWS_CALLBACK_CLEAR_MODE_POLL_FD, |
| 589 | (void *)(long)wsi->sock, NULL, POLLOUT); |
| 590 | |
Andy Green | 9e4c2b6 | 2011-03-07 20:47:39 +0000 | [diff] [blame] | 591 | if (wsi->mode == LWS_CONNMODE_WS_CLIENT) |
| 592 | n = LWS_CALLBACK_CLIENT_WRITEABLE; |
| 593 | else |
| 594 | n = LWS_CALLBACK_SERVER_WRITEABLE; |
| 595 | |
| 596 | wsi->protocol->callback(context, wsi, n, wsi->user_space, NULL, 0); |
Andy Green | 3b84c00 | 2011-03-06 13:14:42 +0000 | [diff] [blame] | 597 | |
| 598 | return 0; |
| 599 | } |
| 600 | |
| 601 | |
| 602 | |
Andy Green | 9f99034 | 2011-02-12 11:57:45 +0000 | [diff] [blame] | 603 | /** |
| 604 | * libwebsocket_service_fd() - Service polled socket with something waiting |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 605 | * @context: Websocket context |
Andy Green | 9f99034 | 2011-02-12 11:57:45 +0000 | [diff] [blame] | 606 | * @pollfd: The pollfd entry describing the socket fd and which events |
| 607 | * happened. |
| 608 | * |
| 609 | * This function closes any active connections and then frees the |
| 610 | * context. After calling this, any further use of the context is |
| 611 | * undefined. |
| 612 | */ |
| 613 | |
| 614 | int |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 615 | libwebsocket_service_fd(struct libwebsocket_context *context, |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 616 | struct pollfd *pollfd) |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 617 | { |
Andy Green | 3b84c00 | 2011-03-06 13:14:42 +0000 | [diff] [blame] | 618 | unsigned char buf[LWS_SEND_BUFFER_PRE_PADDING + 1 + MAX_BROADCAST_PAYLOAD + |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 619 | LWS_SEND_BUFFER_POST_PADDING]; |
Andy Green | a71eafc | 2011-02-14 17:59:43 +0000 | [diff] [blame] | 620 | struct libwebsocket *wsi; |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 621 | struct libwebsocket *new_wsi; |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 622 | int n; |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 623 | int m; |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 624 | size_t len; |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 625 | int accept_fd; |
| 626 | unsigned int clilen; |
| 627 | struct sockaddr_in cli_addr; |
Andy Green | a71eafc | 2011-02-14 17:59:43 +0000 | [diff] [blame] | 628 | struct timeval tv; |
Andy Green | be93fef | 2011-02-14 20:25:43 +0000 | [diff] [blame] | 629 | static const char magic_websocket_guid[] = |
| 630 | "258EAFA5-E914-47DA-95CA-C5AB0DC85B11"; |
| 631 | static const char magic_websocket_04_masking_guid[] = |
| 632 | "61AC5F19-FBBA-4540-B96F-6561F1AB40A8"; |
| 633 | char hash[20]; |
| 634 | char pkt[1024]; |
| 635 | char *p = &pkt[0]; |
| 636 | const char *pc; |
Andy Green | 2366b1c | 2011-03-06 13:15:31 +0000 | [diff] [blame] | 637 | const char *c; |
| 638 | int more = 1; |
Andy Green | be93fef | 2011-02-14 20:25:43 +0000 | [diff] [blame] | 639 | int okay = 0; |
Andy Green | 2366b1c | 2011-03-06 13:15:31 +0000 | [diff] [blame] | 640 | char ext_name[128]; |
Andy Green | 98a717c | 2011-03-06 13:14:15 +0000 | [diff] [blame] | 641 | struct lws_tokens eff_buf; |
Andy Green | c6517fa | 2011-03-06 13:15:29 +0000 | [diff] [blame] | 642 | int ext_count = 0; |
| 643 | struct libwebsocket_extension *ext; |
Andy Green | 6c93955 | 2011-03-08 08:56:57 +0000 | [diff] [blame^] | 644 | int opt = 1; |
Andy Green | c6517fa | 2011-03-06 13:15:29 +0000 | [diff] [blame] | 645 | |
Andy Green | be93fef | 2011-02-14 20:25:43 +0000 | [diff] [blame] | 646 | #ifdef LWS_OPENSSL_SUPPORT |
| 647 | char ssl_err_buf[512]; |
| 648 | #endif |
Andy Green | a71eafc | 2011-02-14 17:59:43 +0000 | [diff] [blame] | 649 | /* |
| 650 | * you can call us with pollfd = NULL to just allow the once-per-second |
| 651 | * global timeout checks; if less than a second since the last check |
| 652 | * it returns immediately then. |
| 653 | */ |
| 654 | |
| 655 | gettimeofday(&tv, NULL); |
| 656 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 657 | if (context->last_timeout_check_s != tv.tv_sec) { |
| 658 | context->last_timeout_check_s = tv.tv_sec; |
Andy Green | a71eafc | 2011-02-14 17:59:43 +0000 | [diff] [blame] | 659 | |
| 660 | /* global timeout check once per second */ |
| 661 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 662 | for (n = 0; n < context->fds_count; n++) { |
| 663 | wsi = wsi_from_fd(context, context->fds[n].fd); |
Andy Green | a71eafc | 2011-02-14 17:59:43 +0000 | [diff] [blame] | 664 | if (!wsi->pending_timeout) |
| 665 | continue; |
| 666 | |
| 667 | /* |
| 668 | * if we went beyond the allowed time, kill the |
| 669 | * connection |
| 670 | */ |
| 671 | |
Andy Green | da527df | 2011-03-07 07:08:12 +0000 | [diff] [blame] | 672 | if (tv.tv_sec > wsi->pending_timeout_limit) { |
| 673 | fprintf(stderr, "TIMEDOUT WAITING\n"); |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 674 | libwebsocket_close_and_free_session(context, |
| 675 | wsi, LWS_CLOSE_STATUS_NOSTATUS); |
Andy Green | da527df | 2011-03-07 07:08:12 +0000 | [diff] [blame] | 676 | } |
Andy Green | a71eafc | 2011-02-14 17:59:43 +0000 | [diff] [blame] | 677 | } |
| 678 | } |
| 679 | |
| 680 | /* just here for timeout management? */ |
| 681 | |
| 682 | if (pollfd == NULL) |
| 683 | return 0; |
| 684 | |
| 685 | /* no, here to service a socket descriptor */ |
| 686 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 687 | wsi = wsi_from_fd(context, pollfd->fd); |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 688 | |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 689 | if (wsi == NULL) |
| 690 | return 1; |
Andy Green | 8f037e4 | 2010-12-19 22:13:26 +0000 | [diff] [blame] | 691 | |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 692 | switch (wsi->mode) { |
| 693 | case LWS_CONNMODE_SERVER_LISTENER: |
| 694 | |
| 695 | /* pollin means a client has connected to us then */ |
| 696 | |
| 697 | if (!pollfd->revents & POLLIN) |
| 698 | break; |
| 699 | |
| 700 | /* listen socket got an unencrypted connection... */ |
| 701 | |
| 702 | clilen = sizeof(cli_addr); |
| 703 | accept_fd = accept(pollfd->fd, (struct sockaddr *)&cli_addr, |
| 704 | &clilen); |
| 705 | if (accept_fd < 0) { |
| 706 | fprintf(stderr, "ERROR on accept"); |
| 707 | break; |
| 708 | } |
| 709 | |
Andy Green | 6c93955 | 2011-03-08 08:56:57 +0000 | [diff] [blame^] | 710 | /* Disable Nagle */ |
| 711 | opt = 1; |
| 712 | setsockopt(accept_fd, SOL_TCP, TCP_NODELAY, &opt, sizeof(opt)); |
| 713 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 714 | if (context->fds_count >= MAX_CLIENTS) { |
Andy Green | 3221f92 | 2011-02-12 13:14:11 +0000 | [diff] [blame] | 715 | fprintf(stderr, "too busy to accept new client\n"); |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 716 | #ifdef WIN32 |
| 717 | closesocket(accept_fd); |
| 718 | #else |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 719 | close(accept_fd); |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 720 | #endif |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 721 | break; |
| 722 | } |
| 723 | |
Andy Green | 0703409 | 2011-02-13 08:37:12 +0000 | [diff] [blame] | 724 | /* |
| 725 | * look at who we connected to and give user code a chance |
| 726 | * to reject based on client IP. There's no protocol selected |
| 727 | * yet so we issue this to protocols[0] |
| 728 | */ |
| 729 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 730 | if ((context->protocols[0].callback)(context, wsi, |
Andy Green | 0703409 | 2011-02-13 08:37:12 +0000 | [diff] [blame] | 731 | LWS_CALLBACK_FILTER_NETWORK_CONNECTION, |
| 732 | (void*)(long)accept_fd, NULL, 0)) { |
| 733 | fprintf(stderr, "Callback denied network connection\n"); |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 734 | #ifdef WIN32 |
| 735 | closesocket(accept_fd); |
| 736 | #else |
Andy Green | 0703409 | 2011-02-13 08:37:12 +0000 | [diff] [blame] | 737 | close(accept_fd); |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 738 | #endif |
Andy Green | 0703409 | 2011-02-13 08:37:12 +0000 | [diff] [blame] | 739 | break; |
| 740 | } |
| 741 | |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 742 | /* accepting connection to main listener */ |
| 743 | |
| 744 | new_wsi = malloc(sizeof(struct libwebsocket)); |
| 745 | if (new_wsi == NULL) { |
| 746 | fprintf(stderr, "Out of memory for new connection\n"); |
| 747 | break; |
| 748 | } |
| 749 | |
| 750 | memset(new_wsi, 0, sizeof (struct libwebsocket)); |
| 751 | new_wsi->sock = accept_fd; |
Andy Green | d6e0911 | 2011-03-05 16:12:15 +0000 | [diff] [blame] | 752 | new_wsi->count_active_extensions = 0; |
Andy Green | a71eafc | 2011-02-14 17:59:43 +0000 | [diff] [blame] | 753 | new_wsi->pending_timeout = NO_PENDING_TIMEOUT; |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 754 | |
| 755 | #ifdef LWS_OPENSSL_SUPPORT |
| 756 | new_wsi->ssl = NULL; |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 757 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 758 | if (context->use_ssl) { |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 759 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 760 | new_wsi->ssl = SSL_new(context->ssl_ctx); |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 761 | if (new_wsi->ssl == NULL) { |
| 762 | fprintf(stderr, "SSL_new failed: %s\n", |
| 763 | ERR_error_string(SSL_get_error( |
| 764 | new_wsi->ssl, 0), NULL)); |
Andy Green | 1f9bf52 | 2011-02-14 21:14:37 +0000 | [diff] [blame] | 765 | libwebsockets_decode_ssl_error(); |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 766 | free(new_wsi); |
| 767 | break; |
| 768 | } |
| 769 | |
| 770 | SSL_set_fd(new_wsi->ssl, accept_fd); |
| 771 | |
| 772 | n = SSL_accept(new_wsi->ssl); |
| 773 | if (n != 1) { |
| 774 | /* |
| 775 | * browsers seem to probe with various |
| 776 | * ssl params which fail then retry |
| 777 | * and succeed |
| 778 | */ |
| 779 | debug("SSL_accept failed skt %u: %s\n", |
| 780 | pollfd->fd, |
| 781 | ERR_error_string(SSL_get_error( |
| 782 | new_wsi->ssl, n), NULL)); |
| 783 | SSL_free( |
| 784 | new_wsi->ssl); |
| 785 | free(new_wsi); |
| 786 | break; |
| 787 | } |
Andy Green | c6bf2c2 | 2011-02-20 11:10:47 +0000 | [diff] [blame] | 788 | |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 789 | debug("accepted new SSL conn " |
| 790 | "port %u on fd=%d SSL ver %s\n", |
| 791 | ntohs(cli_addr.sin_port), accept_fd, |
| 792 | SSL_get_version(new_wsi->ssl)); |
| 793 | |
| 794 | } else |
| 795 | #endif |
| 796 | debug("accepted new conn port %u on fd=%d\n", |
| 797 | ntohs(cli_addr.sin_port), accept_fd); |
| 798 | |
| 799 | /* intialize the instance struct */ |
| 800 | |
| 801 | new_wsi->state = WSI_STATE_HTTP; |
| 802 | new_wsi->name_buffer_pos = 0; |
| 803 | new_wsi->mode = LWS_CONNMODE_WS_SERVING; |
| 804 | |
| 805 | for (n = 0; n < WSI_TOKEN_COUNT; n++) { |
| 806 | new_wsi->utf8_token[n].token = NULL; |
| 807 | new_wsi->utf8_token[n].token_len = 0; |
| 808 | } |
| 809 | |
| 810 | /* |
| 811 | * these can only be set once the protocol is known |
| 812 | * we set an unestablished connection's protocol pointer |
| 813 | * to the start of the supported list, so it can look |
| 814 | * for matching ones during the handshake |
| 815 | */ |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 816 | new_wsi->protocol = context->protocols; |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 817 | new_wsi->user_space = NULL; |
| 818 | |
| 819 | /* |
| 820 | * Default protocol is 76 / 00 |
| 821 | * After 76, there's a header specified to inform which |
| 822 | * draft the client wants, when that's seen we modify |
| 823 | * the individual connection's spec revision accordingly |
| 824 | */ |
| 825 | new_wsi->ietf_spec_revision = 0; |
| 826 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 827 | insert_wsi(context, new_wsi); |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 828 | |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 829 | /* |
| 830 | * make sure NO events are seen yet on this new socket |
| 831 | * (otherwise we inherit old fds[client].revents from |
| 832 | * previous socket there and die mysteriously! ) |
| 833 | */ |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 834 | context->fds[context->fds_count].revents = 0; |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 835 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 836 | context->fds[context->fds_count].events = POLLIN; |
| 837 | context->fds[context->fds_count++].fd = accept_fd; |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 838 | |
Andy Green | 3221f92 | 2011-02-12 13:14:11 +0000 | [diff] [blame] | 839 | /* external POLL support via protocol 0 */ |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 840 | context->protocols[0].callback(context, new_wsi, |
Andy Green | 3221f92 | 2011-02-12 13:14:11 +0000 | [diff] [blame] | 841 | LWS_CALLBACK_ADD_POLL_FD, |
| 842 | (void *)(long)accept_fd, NULL, POLLIN); |
| 843 | |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 844 | break; |
| 845 | |
| 846 | case LWS_CONNMODE_BROADCAST_PROXY_LISTENER: |
| 847 | |
| 848 | /* as we are listening, POLLIN means accept() is needed */ |
| 849 | |
| 850 | if (!pollfd->revents & POLLIN) |
| 851 | break; |
| 852 | |
| 853 | /* listen socket got an unencrypted connection... */ |
| 854 | |
| 855 | clilen = sizeof(cli_addr); |
| 856 | accept_fd = accept(pollfd->fd, (struct sockaddr *)&cli_addr, |
| 857 | &clilen); |
| 858 | if (accept_fd < 0) { |
| 859 | fprintf(stderr, "ERROR on accept"); |
| 860 | break; |
| 861 | } |
| 862 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 863 | if (context->fds_count >= MAX_CLIENTS) { |
Andy Green | 3221f92 | 2011-02-12 13:14:11 +0000 | [diff] [blame] | 864 | fprintf(stderr, "too busy to accept new broadcast " |
| 865 | "proxy client\n"); |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 866 | #ifdef WIN32 |
| 867 | closesocket(accept_fd); |
| 868 | #else |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 869 | close(accept_fd); |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 870 | #endif |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 871 | break; |
| 872 | } |
| 873 | |
| 874 | /* create a dummy wsi for the connection and add it */ |
| 875 | |
| 876 | new_wsi = malloc(sizeof(struct libwebsocket)); |
| 877 | memset(new_wsi, 0, sizeof (struct libwebsocket)); |
| 878 | new_wsi->sock = accept_fd; |
| 879 | new_wsi->mode = LWS_CONNMODE_BROADCAST_PROXY; |
| 880 | new_wsi->state = WSI_STATE_ESTABLISHED; |
Andy Green | d6e0911 | 2011-03-05 16:12:15 +0000 | [diff] [blame] | 881 | new_wsi->count_active_extensions = 0; |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 882 | /* note which protocol we are proxying */ |
| 883 | new_wsi->protocol_index_for_broadcast_proxy = |
| 884 | wsi->protocol_index_for_broadcast_proxy; |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 885 | insert_wsi(context, new_wsi); |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 886 | |
| 887 | /* add connected socket to internal poll array */ |
| 888 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 889 | context->fds[context->fds_count].revents = 0; |
| 890 | context->fds[context->fds_count].events = POLLIN; |
| 891 | context->fds[context->fds_count++].fd = accept_fd; |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 892 | |
Andy Green | 3221f92 | 2011-02-12 13:14:11 +0000 | [diff] [blame] | 893 | /* external POLL support via protocol 0 */ |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 894 | context->protocols[0].callback(context, new_wsi, |
Andy Green | 3221f92 | 2011-02-12 13:14:11 +0000 | [diff] [blame] | 895 | LWS_CALLBACK_ADD_POLL_FD, |
| 896 | (void *)(long)accept_fd, NULL, POLLIN); |
| 897 | |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 898 | break; |
| 899 | |
| 900 | case LWS_CONNMODE_BROADCAST_PROXY: |
Andy Green | 8f037e4 | 2010-12-19 22:13:26 +0000 | [diff] [blame] | 901 | |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 902 | /* handle session socket closed */ |
Andy Green | 8f037e4 | 2010-12-19 22:13:26 +0000 | [diff] [blame] | 903 | |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 904 | if (pollfd->revents & (POLLERR | POLLHUP)) { |
Andy Green | 8f037e4 | 2010-12-19 22:13:26 +0000 | [diff] [blame] | 905 | |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 906 | debug("Session Socket %p (fd=%d) dead\n", |
Timothy J Fontaine | b86d64e | 2011-02-14 17:55:27 +0000 | [diff] [blame] | 907 | (void *)wsi, pollfd->fd); |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 908 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 909 | libwebsocket_close_and_free_session(context, wsi, |
Andy Green | 687b018 | 2011-02-26 11:04:01 +0000 | [diff] [blame] | 910 | LWS_CLOSE_STATUS_NORMAL); |
Andy Green | 4b6fbe1 | 2011-02-14 08:03:48 +0000 | [diff] [blame] | 911 | return 1; |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 912 | } |
Andy Green | 8f037e4 | 2010-12-19 22:13:26 +0000 | [diff] [blame] | 913 | |
Andy Green | 3b84c00 | 2011-03-06 13:14:42 +0000 | [diff] [blame] | 914 | /* |
| 915 | * either extension code with stuff to spill, or the user code, |
| 916 | * requested a callback when it was OK to write |
| 917 | */ |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 918 | |
Andy Green | 3b84c00 | 2011-03-06 13:14:42 +0000 | [diff] [blame] | 919 | if (pollfd->revents & POLLOUT) |
| 920 | if (lws_handle_POLLOUT_event(context, wsi, pollfd) < 0) { |
| 921 | libwebsocket_close_and_free_session(context, wsi, |
| 922 | LWS_CLOSE_STATUS_NORMAL); |
| 923 | return 1; |
| 924 | } |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 925 | |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 926 | /* any incoming data ready? */ |
| 927 | |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 928 | if (!(pollfd->revents & POLLIN)) |
| 929 | break; |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 930 | |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 931 | /* get the issued broadcast payload from the socket */ |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 932 | |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 933 | len = read(pollfd->fd, buf + LWS_SEND_BUFFER_PRE_PADDING, |
| 934 | MAX_BROADCAST_PAYLOAD); |
| 935 | if (len < 0) { |
| 936 | fprintf(stderr, "Error reading broadcast payload\n"); |
Andy Green | 4b6fbe1 | 2011-02-14 08:03:48 +0000 | [diff] [blame] | 937 | break; |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 938 | } |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 939 | |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 940 | /* broadcast it to all guys with this protocol index */ |
Andy Green | 8f037e4 | 2010-12-19 22:13:26 +0000 | [diff] [blame] | 941 | |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 942 | for (n = 0; n < FD_HASHTABLE_MODULUS; n++) { |
Andy Green | 8f037e4 | 2010-12-19 22:13:26 +0000 | [diff] [blame] | 943 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 944 | for (m = 0; m < context->fd_hashtable[n].length; m++) { |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 945 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 946 | new_wsi = context->fd_hashtable[n].wsi[m]; |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 947 | |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 948 | /* only to clients we are serving to */ |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 949 | |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 950 | if (new_wsi->mode != LWS_CONNMODE_WS_SERVING) |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 951 | continue; |
| 952 | |
| 953 | /* |
| 954 | * never broadcast to non-established |
| 955 | * connection |
| 956 | */ |
| 957 | |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 958 | if (new_wsi->state != WSI_STATE_ESTABLISHED) |
Andy Green | 4739e5c | 2011-01-22 12:51:57 +0000 | [diff] [blame] | 959 | continue; |
| 960 | |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 961 | /* |
| 962 | * only broadcast to connections using |
| 963 | * the requested protocol |
| 964 | */ |
| 965 | |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 966 | if (new_wsi->protocol->protocol_index != |
| 967 | wsi->protocol_index_for_broadcast_proxy) |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 968 | continue; |
| 969 | |
Andy Green | 8f037e4 | 2010-12-19 22:13:26 +0000 | [diff] [blame] | 970 | /* broadcast it to this connection */ |
| 971 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 972 | new_wsi->protocol->callback(context, new_wsi, |
Andy Green | 8f037e4 | 2010-12-19 22:13:26 +0000 | [diff] [blame] | 973 | LWS_CALLBACK_BROADCAST, |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 974 | new_wsi->user_space, |
Andy Green | 0ca6a17 | 2010-12-19 20:50:01 +0000 | [diff] [blame] | 975 | buf + LWS_SEND_BUFFER_PRE_PADDING, len); |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 976 | } |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 977 | } |
| 978 | break; |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 979 | |
Andy Green | be93fef | 2011-02-14 20:25:43 +0000 | [diff] [blame] | 980 | case LWS_CONNMODE_WS_CLIENT_WAITING_PROXY_REPLY: |
| 981 | |
| 982 | /* handle proxy hung up on us */ |
| 983 | |
| 984 | if (pollfd->revents & (POLLERR | POLLHUP)) { |
| 985 | |
| 986 | fprintf(stderr, "Proxy connection %p (fd=%d) dead\n", |
| 987 | (void *)wsi, pollfd->fd); |
| 988 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 989 | libwebsocket_close_and_free_session(context, wsi, |
Andy Green | 687b018 | 2011-02-26 11:04:01 +0000 | [diff] [blame] | 990 | LWS_CLOSE_STATUS_NOSTATUS); |
Andy Green | be93fef | 2011-02-14 20:25:43 +0000 | [diff] [blame] | 991 | return 1; |
| 992 | } |
| 993 | |
| 994 | n = recv(wsi->sock, pkt, sizeof pkt, 0); |
| 995 | if (n < 0) { |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 996 | libwebsocket_close_and_free_session(context, wsi, |
Andy Green | 687b018 | 2011-02-26 11:04:01 +0000 | [diff] [blame] | 997 | LWS_CLOSE_STATUS_NOSTATUS); |
Andy Green | be93fef | 2011-02-14 20:25:43 +0000 | [diff] [blame] | 998 | fprintf(stderr, "ERROR reading from proxy socket\n"); |
| 999 | return 1; |
| 1000 | } |
| 1001 | |
| 1002 | pkt[13] = '\0'; |
| 1003 | if (strcmp(pkt, "HTTP/1.0 200 ") != 0) { |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1004 | libwebsocket_close_and_free_session(context, wsi, |
Andy Green | 687b018 | 2011-02-26 11:04:01 +0000 | [diff] [blame] | 1005 | LWS_CLOSE_STATUS_NOSTATUS); |
Andy Green | be93fef | 2011-02-14 20:25:43 +0000 | [diff] [blame] | 1006 | fprintf(stderr, "ERROR from proxy: %s\n", pkt); |
| 1007 | return 1; |
| 1008 | } |
| 1009 | |
| 1010 | /* clear his proxy connection timeout */ |
| 1011 | |
| 1012 | libwebsocket_set_timeout(wsi, NO_PENDING_TIMEOUT, 0); |
| 1013 | |
| 1014 | /* fallthru */ |
| 1015 | |
| 1016 | case LWS_CONNMODE_WS_CLIENT_ISSUE_HANDSHAKE: |
| 1017 | |
| 1018 | #ifdef LWS_OPENSSL_SUPPORT |
| 1019 | if (wsi->use_ssl) { |
| 1020 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1021 | wsi->ssl = SSL_new(context->ssl_client_ctx); |
| 1022 | wsi->client_bio = BIO_new_socket(wsi->sock, |
| 1023 | BIO_NOCLOSE); |
Andy Green | be93fef | 2011-02-14 20:25:43 +0000 | [diff] [blame] | 1024 | SSL_set_bio(wsi->ssl, wsi->client_bio, wsi->client_bio); |
| 1025 | |
Andy Green | 6901cb3 | 2011-02-21 08:06:47 +0000 | [diff] [blame] | 1026 | SSL_set_ex_data(wsi->ssl, |
Andy Green | 2e24da0 | 2011-03-05 16:12:04 +0000 | [diff] [blame] | 1027 | openssl_websocket_private_data_index, |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1028 | context); |
Andy Green | 6901cb3 | 2011-02-21 08:06:47 +0000 | [diff] [blame] | 1029 | |
Andy Green | be93fef | 2011-02-14 20:25:43 +0000 | [diff] [blame] | 1030 | if (SSL_connect(wsi->ssl) <= 0) { |
| 1031 | fprintf(stderr, "SSL connect error %s\n", |
Andy Green | 687b018 | 2011-02-26 11:04:01 +0000 | [diff] [blame] | 1032 | ERR_error_string(ERR_get_error(), |
| 1033 | ssl_err_buf)); |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1034 | libwebsocket_close_and_free_session(context, wsi, |
Andy Green | 687b018 | 2011-02-26 11:04:01 +0000 | [diff] [blame] | 1035 | LWS_CLOSE_STATUS_NOSTATUS); |
Andy Green | be93fef | 2011-02-14 20:25:43 +0000 | [diff] [blame] | 1036 | return 1; |
| 1037 | } |
| 1038 | |
| 1039 | n = SSL_get_verify_result(wsi->ssl); |
Andy Green | 2e24da0 | 2011-03-05 16:12:04 +0000 | [diff] [blame] | 1040 | if ((n != X509_V_OK) && ( |
Andy Green | 687b018 | 2011-02-26 11:04:01 +0000 | [diff] [blame] | 1041 | n != X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT || |
| 1042 | wsi->use_ssl != 2)) { |
Andy Green | be93fef | 2011-02-14 20:25:43 +0000 | [diff] [blame] | 1043 | |
Andy Green | 687b018 | 2011-02-26 11:04:01 +0000 | [diff] [blame] | 1044 | fprintf(stderr, "server's cert didn't " |
| 1045 | "look good %d\n", n); |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1046 | libwebsocket_close_and_free_session(context, |
| 1047 | wsi, LWS_CLOSE_STATUS_NOSTATUS); |
Andy Green | 687b018 | 2011-02-26 11:04:01 +0000 | [diff] [blame] | 1048 | return 1; |
Andy Green | be93fef | 2011-02-14 20:25:43 +0000 | [diff] [blame] | 1049 | } |
| 1050 | } else { |
| 1051 | wsi->ssl = NULL; |
| 1052 | #endif |
| 1053 | |
| 1054 | |
| 1055 | #ifdef LWS_OPENSSL_SUPPORT |
| 1056 | } |
| 1057 | #endif |
| 1058 | |
| 1059 | /* |
| 1060 | * create the random key |
| 1061 | */ |
| 1062 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1063 | n = libwebsockets_get_random(context, hash, 16); |
Andy Green | be93fef | 2011-02-14 20:25:43 +0000 | [diff] [blame] | 1064 | if (n != 16) { |
| 1065 | fprintf(stderr, "Unable to read from random dev %s\n", |
| 1066 | SYSTEM_RANDOM_FILEPATH); |
| 1067 | free(wsi->c_path); |
| 1068 | free(wsi->c_host); |
Andy Green | 08d3392 | 2011-02-26 10:22:49 +0000 | [diff] [blame] | 1069 | if (wsi->c_origin) |
| 1070 | free(wsi->c_origin); |
Andy Green | be93fef | 2011-02-14 20:25:43 +0000 | [diff] [blame] | 1071 | if (wsi->c_protocol) |
| 1072 | free(wsi->c_protocol); |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1073 | libwebsocket_close_and_free_session(context, wsi, |
Andy Green | 687b018 | 2011-02-26 11:04:01 +0000 | [diff] [blame] | 1074 | LWS_CLOSE_STATUS_NOSTATUS); |
Andy Green | be93fef | 2011-02-14 20:25:43 +0000 | [diff] [blame] | 1075 | return 1; |
| 1076 | } |
| 1077 | |
| 1078 | lws_b64_encode_string(hash, 16, wsi->key_b64, |
| 1079 | sizeof wsi->key_b64); |
| 1080 | |
| 1081 | /* |
Andy Green | eeaacb3 | 2011-03-01 20:44:24 +0000 | [diff] [blame] | 1082 | * 00 example client handshake |
| 1083 | * |
| 1084 | * GET /socket.io/websocket HTTP/1.1 |
| 1085 | * Upgrade: WebSocket |
| 1086 | * Connection: Upgrade |
| 1087 | * Host: 127.0.0.1:9999 |
| 1088 | * Origin: http://127.0.0.1 |
| 1089 | * Sec-WebSocket-Key1: 1 0 2#0W 9 89 7 92 ^ |
| 1090 | * Sec-WebSocket-Key2: 7 7Y 4328 B2v[8(z1 |
| 1091 | * Cookie: socketio=websocket |
| 1092 | * |
| 1093 | * (Á®Ä0¶†≥ |
| 1094 | * |
Andy Green | be93fef | 2011-02-14 20:25:43 +0000 | [diff] [blame] | 1095 | * 04 example client handshake |
| 1096 | * |
| 1097 | * GET /chat HTTP/1.1 |
| 1098 | * Host: server.example.com |
| 1099 | * Upgrade: websocket |
| 1100 | * Connection: Upgrade |
| 1101 | * Sec-WebSocket-Key: dGhlIHNhbXBsZSBub25jZQ== |
| 1102 | * Sec-WebSocket-Origin: http://example.com |
| 1103 | * Sec-WebSocket-Protocol: chat, superchat |
| 1104 | * Sec-WebSocket-Version: 4 |
| 1105 | */ |
| 1106 | |
Andy Green | 08d3392 | 2011-02-26 10:22:49 +0000 | [diff] [blame] | 1107 | p += sprintf(p, "GET %s HTTP/1.1\x0d\x0a", wsi->c_path); |
Andy Green | eeaacb3 | 2011-03-01 20:44:24 +0000 | [diff] [blame] | 1108 | |
| 1109 | if (wsi->ietf_spec_revision == 0) { |
| 1110 | unsigned char spaces_1, spaces_2; |
| 1111 | unsigned int max_1, max_2; |
| 1112 | unsigned int num_1, num_2; |
| 1113 | unsigned long product_1, product_2; |
| 1114 | char key_1[40]; |
| 1115 | char key_2[40]; |
| 1116 | unsigned int seed; |
| 1117 | unsigned int count; |
| 1118 | char challenge[16]; |
| 1119 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1120 | libwebsockets_get_random(context, &spaces_1, |
| 1121 | sizeof(char)); |
| 1122 | libwebsockets_get_random(context, &spaces_2, |
| 1123 | sizeof(char)); |
| 1124 | |
Andy Green | eeaacb3 | 2011-03-01 20:44:24 +0000 | [diff] [blame] | 1125 | spaces_1 = (spaces_1 % 12) + 1; |
| 1126 | spaces_2 = (spaces_2 % 12) + 1; |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1127 | |
Andy Green | eeaacb3 | 2011-03-01 20:44:24 +0000 | [diff] [blame] | 1128 | max_1 = 4294967295 / spaces_1; |
| 1129 | max_2 = 4294967295 / spaces_2; |
| 1130 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1131 | libwebsockets_get_random(context, &num_1, sizeof(int)); |
| 1132 | libwebsockets_get_random(context, &num_2, sizeof(int)); |
| 1133 | |
Andy Green | eeaacb3 | 2011-03-01 20:44:24 +0000 | [diff] [blame] | 1134 | num_1 = (num_1 % max_1); |
| 1135 | num_2 = (num_2 % max_2); |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1136 | |
Andy Green | eeaacb3 | 2011-03-01 20:44:24 +0000 | [diff] [blame] | 1137 | challenge[0] = num_1 >> 24; |
| 1138 | challenge[1] = num_1 >> 16; |
| 1139 | challenge[2] = num_1 >> 8; |
| 1140 | challenge[3] = num_1; |
| 1141 | challenge[4] = num_2 >> 24; |
| 1142 | challenge[5] = num_2 >> 16; |
| 1143 | challenge[6] = num_2 >> 8; |
| 1144 | challenge[7] = num_2; |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1145 | |
Andy Green | eeaacb3 | 2011-03-01 20:44:24 +0000 | [diff] [blame] | 1146 | product_1 = num_1 * spaces_1; |
| 1147 | product_2 = num_2 * spaces_2; |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1148 | |
Andy Green | eeaacb3 | 2011-03-01 20:44:24 +0000 | [diff] [blame] | 1149 | sprintf(key_1, "%lu", product_1); |
| 1150 | sprintf(key_2, "%lu", product_2); |
| 1151 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1152 | libwebsockets_get_random(context, &seed, sizeof(int)); |
| 1153 | libwebsockets_get_random(context, &count, sizeof(int)); |
| 1154 | |
Andy Green | eeaacb3 | 2011-03-01 20:44:24 +0000 | [diff] [blame] | 1155 | libwebsockets_00_spam(key_1, (count % 12) + 1, seed); |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1156 | |
| 1157 | libwebsockets_get_random(context, &seed, sizeof(int)); |
| 1158 | libwebsockets_get_random(context, &count, sizeof(int)); |
| 1159 | |
Andy Green | eeaacb3 | 2011-03-01 20:44:24 +0000 | [diff] [blame] | 1160 | libwebsockets_00_spam(key_2, (count % 12) + 1, seed); |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1161 | |
| 1162 | libwebsockets_get_random(context, &seed, sizeof(int)); |
| 1163 | |
Andy Green | eeaacb3 | 2011-03-01 20:44:24 +0000 | [diff] [blame] | 1164 | libwebsockets_00_spaceout(key_1, spaces_1, seed); |
| 1165 | libwebsockets_00_spaceout(key_2, spaces_2, seed >> 16); |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1166 | |
Andy Green | eeaacb3 | 2011-03-01 20:44:24 +0000 | [diff] [blame] | 1167 | p += sprintf(p, "Upgrade: websocket\x0d\x0a" |
| 1168 | "Connection: Upgrade\x0d\x0aHost: %s\x0d\x0a", |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1169 | wsi->c_host); |
Andy Green | eeaacb3 | 2011-03-01 20:44:24 +0000 | [diff] [blame] | 1170 | if (wsi->c_origin) |
| 1171 | p += sprintf(p, "Origin: %s\x0d\x0a", |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1172 | wsi->c_origin); |
| 1173 | |
Andy Green | eeaacb3 | 2011-03-01 20:44:24 +0000 | [diff] [blame] | 1174 | if (wsi->c_protocol) |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1175 | p += sprintf(p, "Sec-WebSocket-Protocol: %s" |
| 1176 | "\x0d\x0a", wsi->c_protocol); |
| 1177 | |
Andy Green | eeaacb3 | 2011-03-01 20:44:24 +0000 | [diff] [blame] | 1178 | p += sprintf(p, "Sec-WebSocket-Key1: %s\x0d\x0a", |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1179 | key_1); |
Andy Green | eeaacb3 | 2011-03-01 20:44:24 +0000 | [diff] [blame] | 1180 | p += sprintf(p, "Sec-WebSocket-Key2: %s\x0d\x0a", |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1181 | key_2); |
Andy Green | eeaacb3 | 2011-03-01 20:44:24 +0000 | [diff] [blame] | 1182 | |
Andy Green | 385e7ad | 2011-03-01 21:06:02 +0000 | [diff] [blame] | 1183 | /* give userland a chance to append, eg, cookies */ |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1184 | |
| 1185 | context->protocols[0].callback(context, wsi, |
| 1186 | LWS_CALLBACK_CLIENT_APPEND_HANDSHAKE_HEADER, |
Andy Green | 385e7ad | 2011-03-01 21:06:02 +0000 | [diff] [blame] | 1187 | NULL, &p, (pkt + sizeof(pkt)) - p - 12); |
| 1188 | |
Andy Green | eeaacb3 | 2011-03-01 20:44:24 +0000 | [diff] [blame] | 1189 | p += sprintf(p, "\x0d\x0a"); |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1190 | |
| 1191 | read(context->fd_random, p, 8); |
Andy Green | eeaacb3 | 2011-03-01 20:44:24 +0000 | [diff] [blame] | 1192 | memcpy(&challenge[8], p, 8); |
| 1193 | p += 8; |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1194 | |
Andy Green | eeaacb3 | 2011-03-01 20:44:24 +0000 | [diff] [blame] | 1195 | /* precompute what we want to see from the server */ |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1196 | |
Andy Green | eeaacb3 | 2011-03-01 20:44:24 +0000 | [diff] [blame] | 1197 | MD5((unsigned char *)challenge, 16, |
| 1198 | (unsigned char *)wsi->initial_handshake_hash_base64); |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1199 | |
Andy Green | eeaacb3 | 2011-03-01 20:44:24 +0000 | [diff] [blame] | 1200 | goto issue_hdr; |
| 1201 | } |
| 1202 | |
Andy Green | 08d3392 | 2011-02-26 10:22:49 +0000 | [diff] [blame] | 1203 | p += sprintf(p, "Host: %s\x0d\x0a", wsi->c_host); |
| 1204 | p += sprintf(p, "Upgrade: websocket\x0d\x0a"); |
| 1205 | p += sprintf(p, "Connection: Upgrade\x0d\x0a" |
Andy Green | be93fef | 2011-02-14 20:25:43 +0000 | [diff] [blame] | 1206 | "Sec-WebSocket-Key: "); |
Andy Green | 08d3392 | 2011-02-26 10:22:49 +0000 | [diff] [blame] | 1207 | strcpy(p, wsi->key_b64); |
| 1208 | p += strlen(wsi->key_b64); |
| 1209 | p += sprintf(p, "\x0d\x0a"); |
| 1210 | if (wsi->c_origin) |
| 1211 | p += sprintf(p, "Sec-WebSocket-Origin: %s\x0d\x0a", |
Andy Green | be93fef | 2011-02-14 20:25:43 +0000 | [diff] [blame] | 1212 | wsi->c_origin); |
Andy Green | 08d3392 | 2011-02-26 10:22:49 +0000 | [diff] [blame] | 1213 | if (wsi->c_protocol) |
Andy Green | be93fef | 2011-02-14 20:25:43 +0000 | [diff] [blame] | 1214 | p += sprintf(p, "Sec-WebSocket-Protocol: %s\x0d\x0a", |
| 1215 | wsi->c_protocol); |
Andy Green | c6517fa | 2011-03-06 13:15:29 +0000 | [diff] [blame] | 1216 | |
| 1217 | /* tell the server what extensions we could support */ |
| 1218 | |
| 1219 | p += sprintf(p, "Sec-WebSocket-Extensions: "); |
| 1220 | |
| 1221 | ext =context->extensions; |
| 1222 | while (ext && ext->callback) { |
| 1223 | |
| 1224 | n = 0; |
| 1225 | n = context->protocols[0].callback(context, wsi, |
| 1226 | LWS_CALLBACK_CLIENT_CONFIRM_EXTENSION_SUPPORTED, |
| 1227 | wsi->user_space, (char *)ext->name, 0); |
| 1228 | |
| 1229 | /* |
| 1230 | * zero return from callback means |
| 1231 | * go ahead and allow the extension, |
| 1232 | * it's what we get if the callback is |
| 1233 | * unhandled |
| 1234 | */ |
| 1235 | |
| 1236 | if (n) { |
| 1237 | ext++; |
| 1238 | continue; |
| 1239 | } |
| 1240 | |
| 1241 | /* apply it */ |
| 1242 | |
| 1243 | if (ext_count) |
| 1244 | *p++ = ','; |
| 1245 | p += sprintf(p, ext->name); |
| 1246 | ext_count++; |
| 1247 | |
| 1248 | ext++; |
| 1249 | } |
| 1250 | |
| 1251 | p += sprintf(p, "\x0d\x0a"); |
| 1252 | |
| 1253 | if (wsi->ietf_spec_revision) |
| 1254 | p += sprintf(p, "Sec-WebSocket-Version: %d\x0d\x0a", |
| 1255 | wsi->ietf_spec_revision); |
| 1256 | |
Andy Green | 385e7ad | 2011-03-01 21:06:02 +0000 | [diff] [blame] | 1257 | /* give userland a chance to append, eg, cookies */ |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1258 | |
| 1259 | context->protocols[0].callback(context, wsi, |
| 1260 | LWS_CALLBACK_CLIENT_APPEND_HANDSHAKE_HEADER, |
| 1261 | NULL, &p, (pkt + sizeof(pkt)) - p - 12); |
| 1262 | |
Andy Green | 385e7ad | 2011-03-01 21:06:02 +0000 | [diff] [blame] | 1263 | p += sprintf(p, "\x0d\x0a"); |
| 1264 | |
Andy Green | be93fef | 2011-02-14 20:25:43 +0000 | [diff] [blame] | 1265 | /* prepare the expected server accept response */ |
| 1266 | |
| 1267 | strcpy((char *)buf, wsi->key_b64); |
| 1268 | strcpy((char *)&buf[strlen((char *)buf)], magic_websocket_guid); |
| 1269 | |
| 1270 | SHA1(buf, strlen((char *)buf), (unsigned char *)hash); |
| 1271 | |
| 1272 | lws_b64_encode_string(hash, 20, |
| 1273 | wsi->initial_handshake_hash_base64, |
| 1274 | sizeof wsi->initial_handshake_hash_base64); |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1275 | |
Andy Green | eeaacb3 | 2011-03-01 20:44:24 +0000 | [diff] [blame] | 1276 | issue_hdr: |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1277 | |
Andy Green | eeaacb3 | 2011-03-01 20:44:24 +0000 | [diff] [blame] | 1278 | /* done with these now */ |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1279 | |
Andy Green | eeaacb3 | 2011-03-01 20:44:24 +0000 | [diff] [blame] | 1280 | free(wsi->c_path); |
| 1281 | free(wsi->c_host); |
| 1282 | if (wsi->c_origin) |
| 1283 | free(wsi->c_origin); |
| 1284 | |
Andy Green | be93fef | 2011-02-14 20:25:43 +0000 | [diff] [blame] | 1285 | /* send our request to the server */ |
| 1286 | |
| 1287 | #ifdef LWS_OPENSSL_SUPPORT |
| 1288 | if (wsi->use_ssl) |
| 1289 | n = SSL_write(wsi->ssl, pkt, p - pkt); |
| 1290 | else |
| 1291 | #endif |
| 1292 | n = send(wsi->sock, pkt, p - pkt, 0); |
| 1293 | |
| 1294 | if (n < 0) { |
| 1295 | fprintf(stderr, "ERROR writing to client socket\n"); |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1296 | libwebsocket_close_and_free_session(context, wsi, |
Andy Green | 687b018 | 2011-02-26 11:04:01 +0000 | [diff] [blame] | 1297 | LWS_CLOSE_STATUS_NOSTATUS); |
Andy Green | be93fef | 2011-02-14 20:25:43 +0000 | [diff] [blame] | 1298 | return 1; |
| 1299 | } |
| 1300 | |
| 1301 | wsi->parser_state = WSI_TOKEN_NAME_PART; |
| 1302 | wsi->mode = LWS_CONNMODE_WS_CLIENT_WAITING_SERVER_REPLY; |
| 1303 | libwebsocket_set_timeout(wsi, |
| 1304 | PENDING_TIMEOUT_AWAITING_SERVER_RESPONSE, 5); |
| 1305 | |
| 1306 | break; |
| 1307 | |
| 1308 | case LWS_CONNMODE_WS_CLIENT_WAITING_SERVER_REPLY: |
| 1309 | |
| 1310 | /* handle server hung up on us */ |
| 1311 | |
| 1312 | if (pollfd->revents & (POLLERR | POLLHUP)) { |
| 1313 | |
| 1314 | fprintf(stderr, "Server connection %p (fd=%d) dead\n", |
| 1315 | (void *)wsi, pollfd->fd); |
| 1316 | |
| 1317 | goto bail3; |
| 1318 | } |
| 1319 | |
| 1320 | |
| 1321 | /* interpret the server response */ |
| 1322 | |
| 1323 | /* |
| 1324 | * HTTP/1.1 101 Switching Protocols |
| 1325 | * Upgrade: websocket |
| 1326 | * Connection: Upgrade |
| 1327 | * Sec-WebSocket-Accept: me89jWimTRKTWwrS3aRrL53YZSo= |
| 1328 | * Sec-WebSocket-Nonce: AQIDBAUGBwgJCgsMDQ4PEC== |
| 1329 | * Sec-WebSocket-Protocol: chat |
| 1330 | */ |
| 1331 | |
| 1332 | #ifdef LWS_OPENSSL_SUPPORT |
| 1333 | if (wsi->use_ssl) |
| 1334 | len = SSL_read(wsi->ssl, pkt, sizeof pkt); |
| 1335 | else |
| 1336 | #endif |
| 1337 | len = recv(wsi->sock, pkt, sizeof pkt, 0); |
| 1338 | |
| 1339 | if (len < 0) { |
| 1340 | fprintf(stderr, |
| 1341 | "libwebsocket_client_handshake read error\n"); |
| 1342 | goto bail3; |
| 1343 | } |
| 1344 | |
| 1345 | p = pkt; |
| 1346 | for (n = 0; n < len; n++) |
| 1347 | libwebsocket_parse(wsi, *p++); |
| 1348 | |
| 1349 | if (wsi->parser_state != WSI_PARSING_COMPLETE) { |
| 1350 | fprintf(stderr, "libwebsocket_client_handshake " |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1351 | "server response failed parsing\n"); |
Andy Green | be93fef | 2011-02-14 20:25:43 +0000 | [diff] [blame] | 1352 | goto bail3; |
| 1353 | } |
| 1354 | |
| 1355 | /* |
Andy Green | eeaacb3 | 2011-03-01 20:44:24 +0000 | [diff] [blame] | 1356 | * 00 / 76 --> |
| 1357 | * |
| 1358 | * HTTP/1.1 101 WebSocket Protocol Handshake |
| 1359 | * Upgrade: WebSocket |
| 1360 | * Connection: Upgrade |
| 1361 | * Sec-WebSocket-Origin: http://127.0.0.1 |
| 1362 | * Sec-WebSocket-Location: ws://127.0.0.1:9999/socket.io/websocket |
| 1363 | * |
| 1364 | * xxxxxxxxxxxxxxxx |
| 1365 | */ |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1366 | |
Andy Green | eeaacb3 | 2011-03-01 20:44:24 +0000 | [diff] [blame] | 1367 | if (wsi->ietf_spec_revision == 0) { |
| 1368 | if (!wsi->utf8_token[WSI_TOKEN_HTTP].token_len || |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1369 | !wsi->utf8_token[WSI_TOKEN_UPGRADE].token_len || |
| 1370 | !wsi->utf8_token[WSI_TOKEN_CHALLENGE].token_len || |
| 1371 | !wsi->utf8_token[WSI_TOKEN_CONNECTION].token_len || |
| 1372 | (!wsi->utf8_token[WSI_TOKEN_PROTOCOL].token_len && |
| 1373 | wsi->c_protocol != NULL)) { |
Andy Green | eeaacb3 | 2011-03-01 20:44:24 +0000 | [diff] [blame] | 1374 | fprintf(stderr, "libwebsocket_client_handshake " |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1375 | "missing required header(s)\n"); |
Andy Green | eeaacb3 | 2011-03-01 20:44:24 +0000 | [diff] [blame] | 1376 | pkt[len] = '\0'; |
| 1377 | fprintf(stderr, "%s", pkt); |
| 1378 | goto bail3; |
| 1379 | } |
Andy Green | eeaacb3 | 2011-03-01 20:44:24 +0000 | [diff] [blame] | 1380 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1381 | strtolower(wsi->utf8_token[WSI_TOKEN_HTTP].token); |
| 1382 | if (strcmp(wsi->utf8_token[WSI_TOKEN_HTTP].token, |
| 1383 | "101 websocket protocol handshake")) { |
Andy Green | eeaacb3 | 2011-03-01 20:44:24 +0000 | [diff] [blame] | 1384 | fprintf(stderr, "libwebsocket_client_handshake " |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1385 | "server sent bad HTTP response '%s'\n", |
| 1386 | wsi->utf8_token[WSI_TOKEN_HTTP].token); |
| 1387 | goto bail3; |
| 1388 | } |
| 1389 | |
| 1390 | if (wsi->utf8_token[WSI_TOKEN_CHALLENGE].token_len < |
| 1391 | 16) { |
| 1392 | fprintf(stderr, "libwebsocket_client_handshake " |
| 1393 | "challenge reply too short %d\n", |
| 1394 | wsi->utf8_token[ |
| 1395 | WSI_TOKEN_CHALLENGE].token_len); |
Andy Green | eeaacb3 | 2011-03-01 20:44:24 +0000 | [diff] [blame] | 1396 | pkt[len] = '\0'; |
| 1397 | fprintf(stderr, "%s", pkt); |
| 1398 | goto bail3; |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1399 | |
Andy Green | eeaacb3 | 2011-03-01 20:44:24 +0000 | [diff] [blame] | 1400 | } |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1401 | |
Andy Green | eeaacb3 | 2011-03-01 20:44:24 +0000 | [diff] [blame] | 1402 | goto select_protocol; |
| 1403 | } |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1404 | |
Andy Green | eeaacb3 | 2011-03-01 20:44:24 +0000 | [diff] [blame] | 1405 | /* |
Andy Green | be93fef | 2011-02-14 20:25:43 +0000 | [diff] [blame] | 1406 | * well, what the server sent looked reasonable for syntax. |
| 1407 | * Now let's confirm it sent all the necessary headers |
| 1408 | */ |
| 1409 | |
| 1410 | if (!wsi->utf8_token[WSI_TOKEN_HTTP].token_len || |
| 1411 | !wsi->utf8_token[WSI_TOKEN_UPGRADE].token_len || |
| 1412 | !wsi->utf8_token[WSI_TOKEN_CONNECTION].token_len || |
| 1413 | !wsi->utf8_token[WSI_TOKEN_ACCEPT].token_len || |
Andy Green | 4eaa86b | 2011-02-26 11:17:48 +0000 | [diff] [blame] | 1414 | (!wsi->utf8_token[WSI_TOKEN_NONCE].token_len && |
| 1415 | wsi->ietf_spec_revision == 4) || |
Andy Green | be93fef | 2011-02-14 20:25:43 +0000 | [diff] [blame] | 1416 | (!wsi->utf8_token[WSI_TOKEN_PROTOCOL].token_len && |
| 1417 | wsi->c_protocol != NULL)) { |
| 1418 | fprintf(stderr, "libwebsocket_client_handshake " |
Andy Green | 687b018 | 2011-02-26 11:04:01 +0000 | [diff] [blame] | 1419 | "missing required header(s)\n"); |
Andy Green | be93fef | 2011-02-14 20:25:43 +0000 | [diff] [blame] | 1420 | pkt[len] = '\0'; |
| 1421 | fprintf(stderr, "%s", pkt); |
| 1422 | goto bail3; |
| 1423 | } |
| 1424 | |
| 1425 | /* |
| 1426 | * Everything seems to be there, now take a closer look at what |
| 1427 | * is in each header |
| 1428 | */ |
| 1429 | |
| 1430 | strtolower(wsi->utf8_token[WSI_TOKEN_HTTP].token); |
| 1431 | if (strcmp(wsi->utf8_token[WSI_TOKEN_HTTP].token, |
| 1432 | "101 switching protocols")) { |
| 1433 | fprintf(stderr, "libwebsocket_client_handshake " |
| 1434 | "server sent bad HTTP response '%s'\n", |
| 1435 | wsi->utf8_token[WSI_TOKEN_HTTP].token); |
| 1436 | goto bail3; |
| 1437 | } |
| 1438 | |
| 1439 | strtolower(wsi->utf8_token[WSI_TOKEN_UPGRADE].token); |
| 1440 | if (strcmp(wsi->utf8_token[WSI_TOKEN_UPGRADE].token, |
| 1441 | "websocket")) { |
| 1442 | fprintf(stderr, "libwebsocket_client_handshake server " |
| 1443 | "sent bad Upgrade header '%s'\n", |
| 1444 | wsi->utf8_token[WSI_TOKEN_UPGRADE].token); |
| 1445 | goto bail3; |
| 1446 | } |
| 1447 | |
| 1448 | strtolower(wsi->utf8_token[WSI_TOKEN_CONNECTION].token); |
| 1449 | if (strcmp(wsi->utf8_token[WSI_TOKEN_CONNECTION].token, |
| 1450 | "upgrade")) { |
| 1451 | fprintf(stderr, "libwebsocket_client_handshake server " |
| 1452 | "sent bad Connection hdr '%s'\n", |
| 1453 | wsi->utf8_token[WSI_TOKEN_CONNECTION].token); |
| 1454 | goto bail3; |
| 1455 | } |
| 1456 | |
Andy Green | eeaacb3 | 2011-03-01 20:44:24 +0000 | [diff] [blame] | 1457 | select_protocol: |
Andy Green | be93fef | 2011-02-14 20:25:43 +0000 | [diff] [blame] | 1458 | pc = wsi->c_protocol; |
| 1459 | |
| 1460 | /* |
| 1461 | * confirm the protocol the server wants to talk was in the list |
| 1462 | * of protocols we offered |
| 1463 | */ |
| 1464 | |
| 1465 | if (!wsi->utf8_token[WSI_TOKEN_PROTOCOL].token_len) { |
| 1466 | |
| 1467 | /* |
| 1468 | * no protocol name to work from, |
| 1469 | * default to first protocol |
| 1470 | */ |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1471 | wsi->protocol = &context->protocols[0]; |
Andy Green | be93fef | 2011-02-14 20:25:43 +0000 | [diff] [blame] | 1472 | |
| 1473 | free(wsi->c_protocol); |
| 1474 | |
| 1475 | goto check_accept; |
| 1476 | } |
| 1477 | |
| 1478 | while (*pc && !okay) { |
| 1479 | if ((!strncmp(pc, |
| 1480 | wsi->utf8_token[WSI_TOKEN_PROTOCOL].token, |
| 1481 | wsi->utf8_token[WSI_TOKEN_PROTOCOL].token_len)) && |
| 1482 | (pc[wsi->utf8_token[WSI_TOKEN_PROTOCOL].token_len] == ',' || |
| 1483 | pc[wsi->utf8_token[WSI_TOKEN_PROTOCOL].token_len] == '\0')) { |
| 1484 | okay = 1; |
| 1485 | continue; |
| 1486 | } |
| 1487 | while (*pc && *pc != ',') |
| 1488 | pc++; |
| 1489 | while (*pc && *pc != ' ') |
| 1490 | pc++; |
| 1491 | } |
| 1492 | |
| 1493 | /* done with him now */ |
| 1494 | |
| 1495 | if (wsi->c_protocol) |
| 1496 | free(wsi->c_protocol); |
| 1497 | |
| 1498 | |
| 1499 | if (!okay) { |
| 1500 | fprintf(stderr, "libwebsocket_client_handshake server " |
| 1501 | "sent bad protocol '%s'\n", |
| 1502 | wsi->utf8_token[WSI_TOKEN_PROTOCOL].token); |
| 1503 | goto bail2; |
| 1504 | } |
| 1505 | |
| 1506 | /* |
| 1507 | * identify the selected protocol struct and set it |
| 1508 | */ |
| 1509 | n = 0; |
| 1510 | wsi->protocol = NULL; |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1511 | while (context->protocols[n].callback) { |
Andy Green | be93fef | 2011-02-14 20:25:43 +0000 | [diff] [blame] | 1512 | if (strcmp(wsi->utf8_token[WSI_TOKEN_PROTOCOL].token, |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1513 | context->protocols[n].name) == 0) |
| 1514 | wsi->protocol = &context->protocols[n]; |
Andy Green | be93fef | 2011-02-14 20:25:43 +0000 | [diff] [blame] | 1515 | n++; |
| 1516 | } |
| 1517 | |
| 1518 | if (wsi->protocol == NULL) { |
| 1519 | fprintf(stderr, "libwebsocket_client_handshake server " |
| 1520 | "requested protocol '%s', which we " |
| 1521 | "said we supported but we don't!\n", |
| 1522 | wsi->utf8_token[WSI_TOKEN_PROTOCOL].token); |
| 1523 | goto bail2; |
| 1524 | } |
| 1525 | |
Andy Green | 2366b1c | 2011-03-06 13:15:31 +0000 | [diff] [blame] | 1526 | |
| 1527 | /* instantiate the accepted extensions */ |
| 1528 | |
| 1529 | if (!wsi->utf8_token[WSI_TOKEN_EXTENSIONS].token_len) |
| 1530 | goto check_accept; |
| 1531 | |
| 1532 | /* |
| 1533 | * break down the list of server accepted extensions |
| 1534 | * and go through matching them or identifying bogons |
| 1535 | */ |
| 1536 | |
| 1537 | c = wsi->utf8_token[WSI_TOKEN_EXTENSIONS].token; |
| 1538 | n = 0; |
| 1539 | while (more) { |
| 1540 | |
| 1541 | if (*c && *c != ',') { |
| 1542 | ext_name[n] = *c++; |
| 1543 | if (n < sizeof(ext_name) - 1) |
| 1544 | n++; |
| 1545 | continue; |
| 1546 | } |
| 1547 | ext_name[n] = '\0'; |
| 1548 | if (!*c) |
| 1549 | more = 0; |
| 1550 | |
| 1551 | /* check we actually support it */ |
| 1552 | |
| 1553 | n = 0; |
| 1554 | ext = wsi->protocol->owning_server->extensions; |
| 1555 | while (ext && ext->callback) { |
| 1556 | |
| 1557 | if (strcmp(ext_name, ext->name)) { |
| 1558 | ext++; |
| 1559 | continue; |
| 1560 | } |
| 1561 | |
| 1562 | n = 1; |
| 1563 | |
| 1564 | /* instantiate the extension on this conn */ |
| 1565 | |
| 1566 | wsi->active_extensions_user[ |
| 1567 | wsi->count_active_extensions] = |
| 1568 | malloc(ext->per_session_data_size); |
| 1569 | wsi->active_extensions[ |
| 1570 | wsi->count_active_extensions] = ext; |
| 1571 | |
| 1572 | /* allow him to construct his context */ |
| 1573 | |
| 1574 | ext->callback(wsi->protocol->owning_server, |
| 1575 | wsi, LWS_EXT_CALLBACK_CLIENT_CONSTRUCT, |
| 1576 | wsi->active_extensions_user[ |
| 1577 | wsi->count_active_extensions], NULL, 0); |
| 1578 | |
| 1579 | wsi->count_active_extensions++; |
| 1580 | |
| 1581 | ext++; |
| 1582 | } |
| 1583 | |
| 1584 | if (n == 0) { |
| 1585 | fprintf(stderr, "Server said we should use" |
| 1586 | "an unknown extension '%s'!\n", ext_name); |
| 1587 | goto bail2; |
| 1588 | } |
| 1589 | |
| 1590 | n = 0; |
| 1591 | } |
| 1592 | |
| 1593 | |
Andy Green | be93fef | 2011-02-14 20:25:43 +0000 | [diff] [blame] | 1594 | check_accept: |
Andy Green | eeaacb3 | 2011-03-01 20:44:24 +0000 | [diff] [blame] | 1595 | |
| 1596 | if (wsi->ietf_spec_revision == 0) { |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1597 | |
Andy Green | eeaacb3 | 2011-03-01 20:44:24 +0000 | [diff] [blame] | 1598 | if (memcmp(wsi->initial_handshake_hash_base64, |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1599 | wsi->utf8_token[WSI_TOKEN_CHALLENGE].token, 16)) { |
Andy Green | eeaacb3 | 2011-03-01 20:44:24 +0000 | [diff] [blame] | 1600 | fprintf(stderr, "libwebsocket_client_handshake " |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1601 | "failed 00 challenge compare\n"); |
| 1602 | pkt[len] = '\0'; |
| 1603 | fprintf(stderr, "%s", pkt); |
| 1604 | goto bail2; |
Andy Green | eeaacb3 | 2011-03-01 20:44:24 +0000 | [diff] [blame] | 1605 | } |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1606 | |
Andy Green | eeaacb3 | 2011-03-01 20:44:24 +0000 | [diff] [blame] | 1607 | goto accept_ok; |
| 1608 | } |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1609 | |
Andy Green | be93fef | 2011-02-14 20:25:43 +0000 | [diff] [blame] | 1610 | /* |
| 1611 | * Confirm his accept token is the one we precomputed |
| 1612 | */ |
| 1613 | |
| 1614 | if (strcmp(wsi->utf8_token[WSI_TOKEN_ACCEPT].token, |
| 1615 | wsi->initial_handshake_hash_base64)) { |
| 1616 | fprintf(stderr, "libwebsocket_client_handshake server " |
| 1617 | "sent bad ACCEPT '%s' vs computed '%s'\n", |
| 1618 | wsi->utf8_token[WSI_TOKEN_ACCEPT].token, |
| 1619 | wsi->initial_handshake_hash_base64); |
| 1620 | goto bail2; |
| 1621 | } |
| 1622 | |
Andy Green | 4eaa86b | 2011-02-26 11:17:48 +0000 | [diff] [blame] | 1623 | if (wsi->ietf_spec_revision == 4) { |
| 1624 | /* |
| 1625 | * Calculate the 04 masking key to use when |
| 1626 | * sending data to server |
| 1627 | */ |
Andy Green | be93fef | 2011-02-14 20:25:43 +0000 | [diff] [blame] | 1628 | |
Andy Green | 4eaa86b | 2011-02-26 11:17:48 +0000 | [diff] [blame] | 1629 | strcpy((char *)buf, wsi->key_b64); |
| 1630 | p = (char *)buf + strlen(wsi->key_b64); |
| 1631 | strcpy(p, wsi->utf8_token[WSI_TOKEN_NONCE].token); |
| 1632 | p += wsi->utf8_token[WSI_TOKEN_NONCE].token_len; |
| 1633 | strcpy(p, magic_websocket_04_masking_guid); |
| 1634 | SHA1(buf, strlen((char *)buf), wsi->masking_key_04); |
| 1635 | } |
Andy Green | eeaacb3 | 2011-03-01 20:44:24 +0000 | [diff] [blame] | 1636 | accept_ok: |
| 1637 | |
Andy Green | be93fef | 2011-02-14 20:25:43 +0000 | [diff] [blame] | 1638 | /* allocate the per-connection user memory (if any) */ |
| 1639 | |
| 1640 | if (wsi->protocol->per_session_data_size) { |
| 1641 | wsi->user_space = malloc( |
| 1642 | wsi->protocol->per_session_data_size); |
| 1643 | if (wsi->user_space == NULL) { |
| 1644 | fprintf(stderr, "Out of memory for " |
| 1645 | "conn user space\n"); |
| 1646 | goto bail2; |
| 1647 | } |
| 1648 | } else |
| 1649 | wsi->user_space = NULL; |
| 1650 | |
| 1651 | /* clear his proxy connection timeout */ |
| 1652 | |
| 1653 | libwebsocket_set_timeout(wsi, NO_PENDING_TIMEOUT, 0); |
| 1654 | |
| 1655 | /* mark him as being alive */ |
| 1656 | |
| 1657 | wsi->state = WSI_STATE_ESTABLISHED; |
| 1658 | wsi->mode = LWS_CONNMODE_WS_CLIENT; |
| 1659 | |
| 1660 | fprintf(stderr, "handshake OK for protocol %s\n", |
| 1661 | wsi->protocol->name); |
| 1662 | |
| 1663 | /* call him back to inform him he is up */ |
| 1664 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1665 | wsi->protocol->callback(context, wsi, |
Andy Green | be93fef | 2011-02-14 20:25:43 +0000 | [diff] [blame] | 1666 | LWS_CALLBACK_CLIENT_ESTABLISHED, |
| 1667 | wsi->user_space, |
| 1668 | NULL, 0); |
| 1669 | |
| 1670 | break; |
| 1671 | |
| 1672 | bail3: |
| 1673 | if (wsi->c_protocol) |
| 1674 | free(wsi->c_protocol); |
| 1675 | |
| 1676 | bail2: |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1677 | libwebsocket_close_and_free_session(context, wsi, |
Andy Green | 687b018 | 2011-02-26 11:04:01 +0000 | [diff] [blame] | 1678 | LWS_CLOSE_STATUS_NOSTATUS); |
Andy Green | be93fef | 2011-02-14 20:25:43 +0000 | [diff] [blame] | 1679 | return 1; |
| 1680 | |
| 1681 | |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 1682 | case LWS_CONNMODE_WS_SERVING: |
| 1683 | case LWS_CONNMODE_WS_CLIENT: |
| 1684 | |
| 1685 | /* handle session socket closed */ |
| 1686 | |
| 1687 | if (pollfd->revents & (POLLERR | POLLHUP)) { |
| 1688 | |
Andy Green | 62c54d2 | 2011-02-14 09:14:25 +0000 | [diff] [blame] | 1689 | fprintf(stderr, "Session Socket %p (fd=%d) dead\n", |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 1690 | (void *)wsi, pollfd->fd); |
| 1691 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1692 | libwebsocket_close_and_free_session(context, wsi, |
Andy Green | 687b018 | 2011-02-26 11:04:01 +0000 | [diff] [blame] | 1693 | LWS_CLOSE_STATUS_NOSTATUS); |
Andy Green | 4b6fbe1 | 2011-02-14 08:03:48 +0000 | [diff] [blame] | 1694 | return 1; |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 1695 | } |
| 1696 | |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 1697 | /* the guy requested a callback when it was OK to write */ |
| 1698 | |
Andy Green | da527df | 2011-03-07 07:08:12 +0000 | [diff] [blame] | 1699 | if ((pollfd->revents & POLLOUT) && |
| 1700 | wsi->state == WSI_STATE_ESTABLISHED) |
| 1701 | if (lws_handle_POLLOUT_event(context, wsi, |
| 1702 | pollfd) < 0) { |
| 1703 | libwebsocket_close_and_free_session( |
| 1704 | context, wsi, LWS_CLOSE_STATUS_NORMAL); |
Andy Green | 3b84c00 | 2011-03-06 13:14:42 +0000 | [diff] [blame] | 1705 | return 1; |
| 1706 | } |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 1707 | |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 1708 | |
| 1709 | /* any incoming data ready? */ |
| 1710 | |
| 1711 | if (!(pollfd->revents & POLLIN)) |
| 1712 | break; |
| 1713 | |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 1714 | #ifdef LWS_OPENSSL_SUPPORT |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 1715 | if (wsi->ssl) |
Andy Green | 98a717c | 2011-03-06 13:14:15 +0000 | [diff] [blame] | 1716 | eff_buf.token_len = SSL_read(wsi->ssl, buf, sizeof buf); |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 1717 | else |
| 1718 | #endif |
Andy Green | 98a717c | 2011-03-06 13:14:15 +0000 | [diff] [blame] | 1719 | eff_buf.token_len = |
| 1720 | recv(pollfd->fd, buf, sizeof buf, 0); |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 1721 | |
Andy Green | 98a717c | 2011-03-06 13:14:15 +0000 | [diff] [blame] | 1722 | if (eff_buf.token_len < 0) { |
| 1723 | fprintf(stderr, "Socket read returned %d\n", |
| 1724 | eff_buf.token_len); |
Andy Green | 4b6fbe1 | 2011-02-14 08:03:48 +0000 | [diff] [blame] | 1725 | break; |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 1726 | } |
Andy Green | 98a717c | 2011-03-06 13:14:15 +0000 | [diff] [blame] | 1727 | if (!eff_buf.token_len) { |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1728 | libwebsocket_close_and_free_session(context, wsi, |
Andy Green | 687b018 | 2011-02-26 11:04:01 +0000 | [diff] [blame] | 1729 | LWS_CLOSE_STATUS_NOSTATUS); |
Andy Green | 4b6fbe1 | 2011-02-14 08:03:48 +0000 | [diff] [blame] | 1730 | return 1; |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 1731 | } |
| 1732 | |
Andy Green | 98a717c | 2011-03-06 13:14:15 +0000 | [diff] [blame] | 1733 | /* |
| 1734 | * give any active extensions a chance to munge the buffer |
| 1735 | * before parse. We pass in a pointer to an lws_tokens struct |
| 1736 | * prepared with the default buffer and content length that's in |
| 1737 | * there. Rather than rewrite the default buffer, extensions |
| 1738 | * that expect to grow the buffer can adapt .token to |
| 1739 | * point to their own per-connection buffer in the extension |
| 1740 | * user allocation. By default with no extensions or no |
| 1741 | * extension callback handling, just the normal input buffer is |
| 1742 | * used then so it is efficient. |
| 1743 | */ |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 1744 | |
Andy Green | 98a717c | 2011-03-06 13:14:15 +0000 | [diff] [blame] | 1745 | eff_buf.token = (char *)buf; |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 1746 | |
Andy Green | 98a717c | 2011-03-06 13:14:15 +0000 | [diff] [blame] | 1747 | more = 1; |
| 1748 | while (more) { |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 1749 | |
Andy Green | 98a717c | 2011-03-06 13:14:15 +0000 | [diff] [blame] | 1750 | more = 0; |
| 1751 | |
| 1752 | for (n = 0; n < wsi->count_active_extensions; n++) { |
| 1753 | m = wsi->active_extensions[n]->callback(context, wsi, |
| 1754 | LWS_EXT_CALLBACK_PACKET_RX_PREPARSE, |
| 1755 | wsi->active_extensions_user[n], &eff_buf, 0); |
| 1756 | if (m < 0) { |
| 1757 | fprintf(stderr, "Extension reports fatal error\n"); |
| 1758 | libwebsocket_close_and_free_session(context, wsi, |
| 1759 | LWS_CLOSE_STATUS_NOSTATUS); |
| 1760 | return 1; |
| 1761 | } |
| 1762 | if (m) |
| 1763 | more = 1; |
| 1764 | } |
| 1765 | |
| 1766 | /* service incoming data */ |
| 1767 | |
| 1768 | if (eff_buf.token_len) { |
| 1769 | n = libwebsocket_read(context, wsi, |
| 1770 | (unsigned char *)eff_buf.token, eff_buf.token_len); |
| 1771 | if (n < 0) |
| 1772 | /* we closed wsi */ |
| 1773 | return 1; |
| 1774 | } |
| 1775 | |
| 1776 | eff_buf.token = NULL; |
| 1777 | eff_buf.token_len = 0; |
| 1778 | } |
| 1779 | break; |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 1780 | } |
| 1781 | |
| 1782 | return 0; |
| 1783 | } |
| 1784 | |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 1785 | |
Andy Green | 6964bb5 | 2011-01-23 16:50:33 +0000 | [diff] [blame] | 1786 | /** |
| 1787 | * libwebsocket_context_destroy() - Destroy the websocket context |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1788 | * @context: Websocket context |
Andy Green | 6964bb5 | 2011-01-23 16:50:33 +0000 | [diff] [blame] | 1789 | * |
| 1790 | * This function closes any active connections and then frees the |
| 1791 | * context. After calling this, any further use of the context is |
| 1792 | * undefined. |
| 1793 | */ |
| 1794 | void |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1795 | libwebsocket_context_destroy(struct libwebsocket_context *context) |
Andy Green | 6964bb5 | 2011-01-23 16:50:33 +0000 | [diff] [blame] | 1796 | { |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 1797 | int n; |
| 1798 | int m; |
| 1799 | struct libwebsocket *wsi; |
Andy Green | 6964bb5 | 2011-01-23 16:50:33 +0000 | [diff] [blame] | 1800 | |
Andy Green | 4b6fbe1 | 2011-02-14 08:03:48 +0000 | [diff] [blame] | 1801 | for (n = 0; n < FD_HASHTABLE_MODULUS; n++) |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1802 | for (m = 0; m < context->fd_hashtable[n].length; m++) { |
| 1803 | wsi = context->fd_hashtable[n].wsi[m]; |
| 1804 | libwebsocket_close_and_free_session(context, wsi, |
Andy Green | 687b018 | 2011-02-26 11:04:01 +0000 | [diff] [blame] | 1805 | LWS_CLOSE_STATUS_GOINGAWAY); |
Andy Green | f3d3b40 | 2011-02-09 07:16:34 +0000 | [diff] [blame] | 1806 | } |
Andy Green | 6964bb5 | 2011-01-23 16:50:33 +0000 | [diff] [blame] | 1807 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1808 | #ifdef WIN32 |
| 1809 | #else |
| 1810 | close(context->fd_random); |
Andy Green | 6964bb5 | 2011-01-23 16:50:33 +0000 | [diff] [blame] | 1811 | #endif |
| 1812 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1813 | #ifdef LWS_OPENSSL_SUPPORT |
| 1814 | if (context->ssl_ctx) |
| 1815 | SSL_CTX_free(context->ssl_ctx); |
| 1816 | if (context->ssl_client_ctx) |
| 1817 | SSL_CTX_free(context->ssl_client_ctx); |
| 1818 | #endif |
| 1819 | |
| 1820 | free(context); |
| 1821 | |
| 1822 | #ifdef WIN32 |
| 1823 | WSACleanup(); |
| 1824 | #endif |
Andy Green | 6964bb5 | 2011-01-23 16:50:33 +0000 | [diff] [blame] | 1825 | } |
| 1826 | |
| 1827 | /** |
| 1828 | * libwebsocket_service() - Service any pending websocket activity |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1829 | * @context: Websocket context |
Andy Green | 6964bb5 | 2011-01-23 16:50:33 +0000 | [diff] [blame] | 1830 | * @timeout_ms: Timeout for poll; 0 means return immediately if nothing needed |
| 1831 | * service otherwise block and service immediately, returning |
| 1832 | * after the timeout if nothing needed service. |
| 1833 | * |
| 1834 | * This function deals with any pending websocket traffic, for three |
| 1835 | * kinds of event. It handles these events on both server and client |
| 1836 | * types of connection the same. |
| 1837 | * |
| 1838 | * 1) Accept new connections to our context's server |
| 1839 | * |
| 1840 | * 2) Perform pending broadcast writes initiated from other forked |
| 1841 | * processes (effectively serializing asynchronous broadcasts) |
| 1842 | * |
| 1843 | * 3) Call the receive callback for incoming frame data received by |
| 1844 | * server or client connections. |
| 1845 | * |
| 1846 | * You need to call this service function periodically to all the above |
| 1847 | * functions to happen; if your application is single-threaded you can |
| 1848 | * just call it in your main event loop. |
| 1849 | * |
| 1850 | * Alternatively you can fork a new process that asynchronously handles |
| 1851 | * calling this service in a loop. In that case you are happy if this |
| 1852 | * call blocks your thread until it needs to take care of something and |
| 1853 | * would call it with a large nonzero timeout. Your loop then takes no |
| 1854 | * CPU while there is nothing happening. |
| 1855 | * |
| 1856 | * If you are calling it in a single-threaded app, you don't want it to |
| 1857 | * wait around blocking other things in your loop from happening, so you |
| 1858 | * would call it with a timeout_ms of 0, so it returns immediately if |
| 1859 | * nothing is pending, or as soon as it services whatever was pending. |
| 1860 | */ |
| 1861 | |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 1862 | |
Andy Green | e92cd17 | 2011-01-19 13:11:55 +0000 | [diff] [blame] | 1863 | int |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1864 | libwebsocket_service(struct libwebsocket_context *context, int timeout_ms) |
Andy Green | e92cd17 | 2011-01-19 13:11:55 +0000 | [diff] [blame] | 1865 | { |
| 1866 | int n; |
Andy Green | e92cd17 | 2011-01-19 13:11:55 +0000 | [diff] [blame] | 1867 | |
| 1868 | /* stay dead once we are dead */ |
| 1869 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1870 | if (context == NULL) |
Andy Green | e92cd17 | 2011-01-19 13:11:55 +0000 | [diff] [blame] | 1871 | return 1; |
| 1872 | |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 1873 | /* wait for something to need service */ |
Andy Green | 4739e5c | 2011-01-22 12:51:57 +0000 | [diff] [blame] | 1874 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1875 | n = poll(context->fds, context->fds_count, timeout_ms); |
Andy Green | 3221f92 | 2011-02-12 13:14:11 +0000 | [diff] [blame] | 1876 | if (n == 0) /* poll timeout */ |
| 1877 | return 0; |
Andy Green | e92cd17 | 2011-01-19 13:11:55 +0000 | [diff] [blame] | 1878 | |
Andy Green | 62c54d2 | 2011-02-14 09:14:25 +0000 | [diff] [blame] | 1879 | if (n < 0) { |
Andy Green | 5e1fa17 | 2011-02-10 09:07:05 +0000 | [diff] [blame] | 1880 | /* |
Andy Green | e92cd17 | 2011-01-19 13:11:55 +0000 | [diff] [blame] | 1881 | fprintf(stderr, "Listen Socket dead\n"); |
Andy Green | 5e1fa17 | 2011-02-10 09:07:05 +0000 | [diff] [blame] | 1882 | */ |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 1883 | return 1; |
Andy Green | e92cd17 | 2011-01-19 13:11:55 +0000 | [diff] [blame] | 1884 | } |
Andy Green | e92cd17 | 2011-01-19 13:11:55 +0000 | [diff] [blame] | 1885 | |
| 1886 | /* handle accept on listening socket? */ |
| 1887 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1888 | for (n = 0; n < context->fds_count; n++) |
| 1889 | if (context->fds[n].revents) |
| 1890 | libwebsocket_service_fd(context, &context->fds[n]); |
Andy Green | e92cd17 | 2011-01-19 13:11:55 +0000 | [diff] [blame] | 1891 | |
| 1892 | return 0; |
Andy Green | e92cd17 | 2011-01-19 13:11:55 +0000 | [diff] [blame] | 1893 | } |
| 1894 | |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 1895 | /** |
| 1896 | * libwebsocket_callback_on_writable() - Request a callback when this socket |
| 1897 | * becomes able to be written to without |
| 1898 | * blocking |
Andy Green | 32375b7 | 2011-02-19 08:32:53 +0000 | [diff] [blame] | 1899 | * |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1900 | * @context: libwebsockets context |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 1901 | * @wsi: Websocket connection instance to get callback for |
| 1902 | */ |
| 1903 | |
| 1904 | int |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1905 | libwebsocket_callback_on_writable(struct libwebsocket_context *context, |
Andy Green | 62c54d2 | 2011-02-14 09:14:25 +0000 | [diff] [blame] | 1906 | struct libwebsocket *wsi) |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 1907 | { |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 1908 | int n; |
| 1909 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1910 | for (n = 0; n < context->fds_count; n++) |
| 1911 | if (context->fds[n].fd == wsi->sock) { |
| 1912 | context->fds[n].events |= POLLOUT; |
| 1913 | n = context->fds_count; |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 1914 | } |
| 1915 | |
Andy Green | 3221f92 | 2011-02-12 13:14:11 +0000 | [diff] [blame] | 1916 | /* external POLL support via protocol 0 */ |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1917 | context->protocols[0].callback(context, wsi, |
Andy Green | 3221f92 | 2011-02-12 13:14:11 +0000 | [diff] [blame] | 1918 | LWS_CALLBACK_SET_MODE_POLL_FD, |
| 1919 | (void *)(long)wsi->sock, NULL, POLLOUT); |
| 1920 | |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 1921 | return 1; |
| 1922 | } |
| 1923 | |
| 1924 | /** |
| 1925 | * libwebsocket_callback_on_writable_all_protocol() - Request a callback for |
| 1926 | * all connections using the given protocol when it |
| 1927 | * becomes possible to write to each socket without |
| 1928 | * blocking in turn. |
| 1929 | * |
| 1930 | * @protocol: Protocol whose connections will get callbacks |
| 1931 | */ |
| 1932 | |
| 1933 | int |
| 1934 | libwebsocket_callback_on_writable_all_protocol( |
| 1935 | const struct libwebsocket_protocols *protocol) |
| 1936 | { |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1937 | struct libwebsocket_context *context = protocol->owning_server; |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 1938 | int n; |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 1939 | int m; |
| 1940 | struct libwebsocket *wsi; |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 1941 | |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 1942 | for (n = 0; n < FD_HASHTABLE_MODULUS; n++) { |
| 1943 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1944 | for (m = 0; m < context->fd_hashtable[n].length; m++) { |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 1945 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1946 | wsi = context->fd_hashtable[n].wsi[m]; |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 1947 | |
| 1948 | if (wsi->protocol == protocol) |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 1949 | libwebsocket_callback_on_writable(context, wsi); |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 1950 | } |
| 1951 | } |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 1952 | |
| 1953 | return 0; |
| 1954 | } |
| 1955 | |
Andy Green | be93fef | 2011-02-14 20:25:43 +0000 | [diff] [blame] | 1956 | /** |
| 1957 | * libwebsocket_set_timeout() - marks the wsi as subject to a timeout |
| 1958 | * |
| 1959 | * You will not need this unless you are doing something special |
| 1960 | * |
| 1961 | * @wsi: Websocket connection instance |
| 1962 | * @reason: timeout reason |
| 1963 | * @secs: how many seconds |
| 1964 | */ |
| 1965 | |
| 1966 | void |
| 1967 | libwebsocket_set_timeout(struct libwebsocket *wsi, |
| 1968 | enum pending_timeout reason, int secs) |
| 1969 | { |
| 1970 | struct timeval tv; |
| 1971 | |
| 1972 | gettimeofday(&tv, NULL); |
| 1973 | |
| 1974 | wsi->pending_timeout_limit = tv.tv_sec + secs; |
| 1975 | wsi->pending_timeout = reason; |
| 1976 | } |
| 1977 | |
Andy Green | a6cbece | 2011-01-27 20:06:03 +0000 | [diff] [blame] | 1978 | |
| 1979 | /** |
| 1980 | * libwebsocket_get_socket_fd() - returns the socket file descriptor |
| 1981 | * |
| 1982 | * You will not need this unless you are doing something special |
| 1983 | * |
| 1984 | * @wsi: Websocket connection instance |
| 1985 | */ |
| 1986 | |
| 1987 | int |
| 1988 | libwebsocket_get_socket_fd(struct libwebsocket *wsi) |
| 1989 | { |
| 1990 | return wsi->sock; |
| 1991 | } |
| 1992 | |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 1993 | /** |
| 1994 | * libwebsocket_rx_flow_control() - Enable and disable socket servicing for |
| 1995 | * receieved packets. |
| 1996 | * |
| 1997 | * If the output side of a server process becomes choked, this allows flow |
| 1998 | * control for the input side. |
| 1999 | * |
| 2000 | * @wsi: Websocket connection instance to get callback for |
| 2001 | * @enable: 0 = disable read servicing for this connection, 1 = enable |
| 2002 | */ |
| 2003 | |
| 2004 | int |
| 2005 | libwebsocket_rx_flow_control(struct libwebsocket *wsi, int enable) |
| 2006 | { |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2007 | struct libwebsocket_context *context = wsi->protocol->owning_server; |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 2008 | int n; |
| 2009 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2010 | for (n = 0; n < context->fds_count; n++) |
| 2011 | if (context->fds[n].fd == wsi->sock) { |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 2012 | if (enable) |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2013 | context->fds[n].events |= POLLIN; |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 2014 | else |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2015 | context->fds[n].events &= ~POLLIN; |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 2016 | |
| 2017 | return 0; |
| 2018 | } |
| 2019 | |
Andy Green | 3221f92 | 2011-02-12 13:14:11 +0000 | [diff] [blame] | 2020 | if (enable) |
| 2021 | /* external POLL support via protocol 0 */ |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2022 | context->protocols[0].callback(context, wsi, |
Andy Green | 3221f92 | 2011-02-12 13:14:11 +0000 | [diff] [blame] | 2023 | LWS_CALLBACK_SET_MODE_POLL_FD, |
| 2024 | (void *)(long)wsi->sock, NULL, POLLIN); |
| 2025 | else |
| 2026 | /* external POLL support via protocol 0 */ |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2027 | context->protocols[0].callback(context, wsi, |
Andy Green | 3221f92 | 2011-02-12 13:14:11 +0000 | [diff] [blame] | 2028 | LWS_CALLBACK_CLEAR_MODE_POLL_FD, |
| 2029 | (void *)(long)wsi->sock, NULL, POLLIN); |
| 2030 | |
| 2031 | |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 2032 | fprintf(stderr, "libwebsocket_callback_on_writable " |
| 2033 | "unable to find socket\n"); |
| 2034 | return 1; |
| 2035 | } |
| 2036 | |
Andy Green | 2ac5a6f | 2011-01-28 10:00:18 +0000 | [diff] [blame] | 2037 | /** |
| 2038 | * libwebsocket_canonical_hostname() - returns this host's hostname |
| 2039 | * |
| 2040 | * This is typically used by client code to fill in the host parameter |
| 2041 | * when making a client connection. You can only call it after the context |
| 2042 | * has been created. |
| 2043 | * |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2044 | * @context: Websocket context |
Andy Green | 2ac5a6f | 2011-01-28 10:00:18 +0000 | [diff] [blame] | 2045 | */ |
| 2046 | |
| 2047 | |
| 2048 | extern const char * |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2049 | libwebsocket_canonical_hostname(struct libwebsocket_context *context) |
Andy Green | 2ac5a6f | 2011-01-28 10:00:18 +0000 | [diff] [blame] | 2050 | { |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2051 | return (const char *)context->canonical_hostname; |
Andy Green | 2ac5a6f | 2011-01-28 10:00:18 +0000 | [diff] [blame] | 2052 | } |
| 2053 | |
| 2054 | |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 2055 | static void sigpipe_handler(int x) |
| 2056 | { |
| 2057 | } |
| 2058 | |
Andy Green | 6901cb3 | 2011-02-21 08:06:47 +0000 | [diff] [blame] | 2059 | #ifdef LWS_OPENSSL_SUPPORT |
| 2060 | static int |
| 2061 | OpenSSL_verify_callback(int preverify_ok, X509_STORE_CTX *x509_ctx) |
| 2062 | { |
| 2063 | |
| 2064 | SSL *ssl; |
| 2065 | int n; |
Andy Green | 2e24da0 | 2011-03-05 16:12:04 +0000 | [diff] [blame] | 2066 | struct libwebsocket_context *context; |
Andy Green | 6901cb3 | 2011-02-21 08:06:47 +0000 | [diff] [blame] | 2067 | |
| 2068 | ssl = X509_STORE_CTX_get_ex_data(x509_ctx, |
| 2069 | SSL_get_ex_data_X509_STORE_CTX_idx()); |
| 2070 | |
| 2071 | /* |
Andy Green | 2e24da0 | 2011-03-05 16:12:04 +0000 | [diff] [blame] | 2072 | * !!! nasty openssl requires the index to come as a library-scope |
| 2073 | * static |
Andy Green | 6901cb3 | 2011-02-21 08:06:47 +0000 | [diff] [blame] | 2074 | */ |
Andy Green | 2e24da0 | 2011-03-05 16:12:04 +0000 | [diff] [blame] | 2075 | context = SSL_get_ex_data(ssl, openssl_websocket_private_data_index); |
Andy Green | 6901cb3 | 2011-02-21 08:06:47 +0000 | [diff] [blame] | 2076 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2077 | n = context->protocols[0].callback(NULL, NULL, |
Andy Green | 6901cb3 | 2011-02-21 08:06:47 +0000 | [diff] [blame] | 2078 | LWS_CALLBACK_OPENSSL_PERFORM_CLIENT_CERT_VERIFICATION, |
| 2079 | x509_ctx, ssl, preverify_ok); |
| 2080 | |
| 2081 | /* convert return code from 0 = OK to 1 = OK */ |
| 2082 | |
| 2083 | if (!n) |
| 2084 | n = 1; |
| 2085 | else |
| 2086 | n = 0; |
| 2087 | |
| 2088 | return n; |
| 2089 | } |
| 2090 | #endif |
| 2091 | |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 2092 | |
Andy Green | ab990e4 | 2010-10-31 12:42:52 +0000 | [diff] [blame] | 2093 | /** |
Andy Green | 4739e5c | 2011-01-22 12:51:57 +0000 | [diff] [blame] | 2094 | * libwebsocket_create_context() - Create the websocket handler |
| 2095 | * @port: Port to listen on... you can use 0 to suppress listening on |
Andy Green | 6964bb5 | 2011-01-23 16:50:33 +0000 | [diff] [blame] | 2096 | * any port, that's what you want if you are not running a |
| 2097 | * websocket server at all but just using it as a client |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2098 | * @interf: NULL to bind the listen socket to all interfaces, or the |
Andy Green | 32375b7 | 2011-02-19 08:32:53 +0000 | [diff] [blame] | 2099 | * interface name, eg, "eth2" |
Andy Green | 4f3943a | 2010-11-12 10:44:16 +0000 | [diff] [blame] | 2100 | * @protocols: Array of structures listing supported protocols and a protocol- |
Andy Green | 8f037e4 | 2010-12-19 22:13:26 +0000 | [diff] [blame] | 2101 | * specific callback for each one. The list is ended with an |
| 2102 | * entry that has a NULL callback pointer. |
Andy Green | 6964bb5 | 2011-01-23 16:50:33 +0000 | [diff] [blame] | 2103 | * It's not const because we write the owning_server member |
Andy Green | c511482 | 2011-03-06 10:29:35 +0000 | [diff] [blame] | 2104 | * @extensions: NULL or array of libwebsocket_extension structs listing the |
| 2105 | * extensions this context supports |
Andy Green | 3faa9c7 | 2010-11-08 17:03:03 +0000 | [diff] [blame] | 2106 | * @ssl_cert_filepath: If libwebsockets was compiled to use ssl, and you want |
Andy Green | 8f037e4 | 2010-12-19 22:13:26 +0000 | [diff] [blame] | 2107 | * to listen using SSL, set to the filepath to fetch the |
| 2108 | * server cert from, otherwise NULL for unencrypted |
Andy Green | 3faa9c7 | 2010-11-08 17:03:03 +0000 | [diff] [blame] | 2109 | * @ssl_private_key_filepath: filepath to private key if wanting SSL mode, |
Andy Green | 8f037e4 | 2010-12-19 22:13:26 +0000 | [diff] [blame] | 2110 | * else ignored |
Andy Green | 3faa9c7 | 2010-11-08 17:03:03 +0000 | [diff] [blame] | 2111 | * @gid: group id to change to after setting listen socket, or -1. |
| 2112 | * @uid: user id to change to after setting listen socket, or -1. |
Andy Green | bfb051f | 2011-02-09 08:49:14 +0000 | [diff] [blame] | 2113 | * @options: 0, or LWS_SERVER_OPTION_DEFEAT_CLIENT_MASK |
Andy Green | 05464c6 | 2010-11-12 10:44:18 +0000 | [diff] [blame] | 2114 | * |
Andy Green | 8f037e4 | 2010-12-19 22:13:26 +0000 | [diff] [blame] | 2115 | * This function creates the listening socket and takes care |
| 2116 | * of all initialization in one step. |
| 2117 | * |
Andy Green | e92cd17 | 2011-01-19 13:11:55 +0000 | [diff] [blame] | 2118 | * After initialization, it returns a struct libwebsocket_context * that |
| 2119 | * represents this server. After calling, user code needs to take care |
| 2120 | * of calling libwebsocket_service() with the context pointer to get the |
| 2121 | * server's sockets serviced. This can be done in the same process context |
| 2122 | * or a forked process, or another thread, |
Andy Green | 05464c6 | 2010-11-12 10:44:18 +0000 | [diff] [blame] | 2123 | * |
Andy Green | 8f037e4 | 2010-12-19 22:13:26 +0000 | [diff] [blame] | 2124 | * The protocol callback functions are called for a handful of events |
| 2125 | * including http requests coming in, websocket connections becoming |
| 2126 | * established, and data arriving; it's also called periodically to allow |
| 2127 | * async transmission. |
| 2128 | * |
| 2129 | * HTTP requests are sent always to the FIRST protocol in @protocol, since |
| 2130 | * at that time websocket protocol has not been negotiated. Other |
| 2131 | * protocols after the first one never see any HTTP callack activity. |
| 2132 | * |
| 2133 | * The server created is a simple http server by default; part of the |
| 2134 | * websocket standard is upgrading this http connection to a websocket one. |
| 2135 | * |
| 2136 | * This allows the same server to provide files like scripts and favicon / |
| 2137 | * images or whatever over http and dynamic data over websockets all in |
| 2138 | * one place; they're all handled in the user callback. |
Andy Green | ab990e4 | 2010-10-31 12:42:52 +0000 | [diff] [blame] | 2139 | */ |
Andy Green | 4ea6006 | 2010-10-30 12:15:07 +0100 | [diff] [blame] | 2140 | |
Andy Green | e92cd17 | 2011-01-19 13:11:55 +0000 | [diff] [blame] | 2141 | struct libwebsocket_context * |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2142 | libwebsocket_create_context(int port, const char *interf, |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 2143 | struct libwebsocket_protocols *protocols, |
Andy Green | d6e0911 | 2011-03-05 16:12:15 +0000 | [diff] [blame] | 2144 | struct libwebsocket_extension *extensions, |
Andy Green | 8f037e4 | 2010-12-19 22:13:26 +0000 | [diff] [blame] | 2145 | const char *ssl_cert_filepath, |
| 2146 | const char *ssl_private_key_filepath, |
Andy Green | 8014b29 | 2011-01-30 20:57:25 +0000 | [diff] [blame] | 2147 | int gid, int uid, unsigned int options) |
Andy Green | ff95d7a | 2010-10-28 22:36:01 +0100 | [diff] [blame] | 2148 | { |
| 2149 | int n; |
Andy Green | 4739e5c | 2011-01-22 12:51:57 +0000 | [diff] [blame] | 2150 | int sockfd = 0; |
Andy Green | 251f6fa | 2010-11-03 11:13:06 +0000 | [diff] [blame] | 2151 | int fd; |
Andy Green | ff95d7a | 2010-10-28 22:36:01 +0100 | [diff] [blame] | 2152 | struct sockaddr_in serv_addr, cli_addr; |
Andy Green | 251f6fa | 2010-11-03 11:13:06 +0000 | [diff] [blame] | 2153 | int opt = 1; |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2154 | struct libwebsocket_context *context = NULL; |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 2155 | unsigned int slen; |
Andy Green | 9659f37 | 2011-01-27 22:01:43 +0000 | [diff] [blame] | 2156 | char *p; |
Andy Green | 2ac5a6f | 2011-01-28 10:00:18 +0000 | [diff] [blame] | 2157 | char hostname[1024]; |
Andy Green | 42f6914 | 2011-01-30 08:10:02 +0000 | [diff] [blame] | 2158 | struct hostent *he; |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 2159 | struct libwebsocket *wsi; |
Andy Green | ff95d7a | 2010-10-28 22:36:01 +0100 | [diff] [blame] | 2160 | |
Andy Green | 3faa9c7 | 2010-11-08 17:03:03 +0000 | [diff] [blame] | 2161 | #ifdef LWS_OPENSSL_SUPPORT |
Andy Green | f2f54d5 | 2010-11-15 22:08:00 +0000 | [diff] [blame] | 2162 | SSL_METHOD *method; |
Andy Green | 3faa9c7 | 2010-11-08 17:03:03 +0000 | [diff] [blame] | 2163 | char ssl_err_buf[512]; |
Andy Green | 3faa9c7 | 2010-11-08 17:03:03 +0000 | [diff] [blame] | 2164 | #endif |
| 2165 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2166 | #ifdef _WIN32 |
| 2167 | { |
| 2168 | WORD wVersionRequested; |
| 2169 | WSADATA wsaData; |
| 2170 | int err; |
| 2171 | |
| 2172 | /* Use the MAKEWORD(lowbyte, highbyte) macro from Windef.h */ |
| 2173 | wVersionRequested = MAKEWORD(2, 2); |
| 2174 | |
| 2175 | err = WSAStartup(wVersionRequested, &wsaData); |
| 2176 | if (err != 0) { |
| 2177 | /* Tell the user that we could not find a usable */ |
| 2178 | /* Winsock DLL. */ |
| 2179 | fprintf(stderr, "WSAStartup failed with error: %d\n", |
| 2180 | err); |
| 2181 | return NULL; |
| 2182 | } |
| 2183 | } |
| 2184 | #endif |
| 2185 | |
| 2186 | |
| 2187 | context = malloc(sizeof(struct libwebsocket_context)); |
| 2188 | if (!context) { |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 2189 | fprintf(stderr, "No memory for websocket context\n"); |
| 2190 | return NULL; |
| 2191 | } |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2192 | context->protocols = protocols; |
| 2193 | context->listen_port = port; |
| 2194 | context->http_proxy_port = 0; |
| 2195 | context->http_proxy_address[0] = '\0'; |
| 2196 | context->options = options; |
| 2197 | context->fds_count = 0; |
Andy Green | d6e0911 | 2011-03-05 16:12:15 +0000 | [diff] [blame] | 2198 | context->extensions = extensions; |
Andy Green | 9659f37 | 2011-01-27 22:01:43 +0000 | [diff] [blame] | 2199 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2200 | #ifdef WIN32 |
| 2201 | context->fd_random = 0; |
| 2202 | #else |
| 2203 | context->fd_random = open(SYSTEM_RANDOM_FILEPATH, O_RDONLY); |
| 2204 | if (context->fd_random < 0) { |
Andy Green | 44eee68 | 2011-02-10 09:32:24 +0000 | [diff] [blame] | 2205 | fprintf(stderr, "Unable to open random device %s %d\n", |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2206 | SYSTEM_RANDOM_FILEPATH, context->fd_random); |
Andy Green | 44eee68 | 2011-02-10 09:32:24 +0000 | [diff] [blame] | 2207 | return NULL; |
| 2208 | } |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2209 | #endif |
Andy Green | 44eee68 | 2011-02-10 09:32:24 +0000 | [diff] [blame] | 2210 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2211 | #ifdef LWS_OPENSSL_SUPPORT |
| 2212 | context->use_ssl = 0; |
| 2213 | context->ssl_ctx = NULL; |
| 2214 | context->ssl_client_ctx = NULL; |
Andy Green | 2e24da0 | 2011-03-05 16:12:04 +0000 | [diff] [blame] | 2215 | openssl_websocket_private_data_index = 0; |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2216 | #endif |
Andy Green | 2ac5a6f | 2011-01-28 10:00:18 +0000 | [diff] [blame] | 2217 | /* find canonical hostname */ |
| 2218 | |
| 2219 | hostname[(sizeof hostname) - 1] = '\0'; |
| 2220 | gethostname(hostname, (sizeof hostname) - 1); |
| 2221 | he = gethostbyname(hostname); |
Darin Willits | c19456f | 2011-02-14 17:52:39 +0000 | [diff] [blame] | 2222 | if (he) { |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2223 | strncpy(context->canonical_hostname, he->h_name, |
| 2224 | sizeof context->canonical_hostname - 1); |
| 2225 | context->canonical_hostname[ |
| 2226 | sizeof context->canonical_hostname - 1] = '\0'; |
Darin Willits | c19456f | 2011-02-14 17:52:39 +0000 | [diff] [blame] | 2227 | } else |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2228 | strncpy(context->canonical_hostname, hostname, |
| 2229 | sizeof context->canonical_hostname - 1); |
Andy Green | 2ac5a6f | 2011-01-28 10:00:18 +0000 | [diff] [blame] | 2230 | |
Andy Green | 9659f37 | 2011-01-27 22:01:43 +0000 | [diff] [blame] | 2231 | /* split the proxy ads:port if given */ |
| 2232 | |
| 2233 | p = getenv("http_proxy"); |
| 2234 | if (p) { |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2235 | strncpy(context->http_proxy_address, p, |
| 2236 | sizeof context->http_proxy_address - 1); |
| 2237 | context->http_proxy_address[ |
| 2238 | sizeof context->http_proxy_address - 1] = '\0'; |
Andy Green | 9659f37 | 2011-01-27 22:01:43 +0000 | [diff] [blame] | 2239 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2240 | p = strchr(context->http_proxy_address, ':'); |
Andy Green | 9659f37 | 2011-01-27 22:01:43 +0000 | [diff] [blame] | 2241 | if (p == NULL) { |
| 2242 | fprintf(stderr, "http_proxy needs to be ads:port\n"); |
| 2243 | return NULL; |
| 2244 | } |
| 2245 | *p = '\0'; |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2246 | context->http_proxy_port = atoi(p + 1); |
Andy Green | 9659f37 | 2011-01-27 22:01:43 +0000 | [diff] [blame] | 2247 | |
| 2248 | fprintf(stderr, "Using proxy %s:%u\n", |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2249 | context->http_proxy_address, |
| 2250 | context->http_proxy_port); |
Andy Green | 9659f37 | 2011-01-27 22:01:43 +0000 | [diff] [blame] | 2251 | } |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 2252 | |
| 2253 | if (port) { |
| 2254 | |
Andy Green | 3faa9c7 | 2010-11-08 17:03:03 +0000 | [diff] [blame] | 2255 | #ifdef LWS_OPENSSL_SUPPORT |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2256 | context->use_ssl = ssl_cert_filepath != NULL && |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 2257 | ssl_private_key_filepath != NULL; |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2258 | if (context->use_ssl) |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 2259 | fprintf(stderr, " Compiled with SSL support, " |
| 2260 | "using it\n"); |
| 2261 | else |
| 2262 | fprintf(stderr, " Compiled with SSL support, " |
| 2263 | "not using it\n"); |
Andy Green | 3faa9c7 | 2010-11-08 17:03:03 +0000 | [diff] [blame] | 2264 | |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 2265 | #else |
| 2266 | if (ssl_cert_filepath != NULL && |
| 2267 | ssl_private_key_filepath != NULL) { |
| 2268 | fprintf(stderr, " Not compiled for OpenSSl support!\n"); |
Andy Green | e92cd17 | 2011-01-19 13:11:55 +0000 | [diff] [blame] | 2269 | return NULL; |
Andy Green | 3faa9c7 | 2010-11-08 17:03:03 +0000 | [diff] [blame] | 2270 | } |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 2271 | fprintf(stderr, " Compiled without SSL support, " |
| 2272 | "serving unencrypted\n"); |
| 2273 | #endif |
| 2274 | } |
| 2275 | |
| 2276 | /* ignore SIGPIPE */ |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2277 | #ifdef WIN32 |
| 2278 | #else |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 2279 | signal(SIGPIPE, sigpipe_handler); |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2280 | #endif |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 2281 | |
| 2282 | |
| 2283 | #ifdef LWS_OPENSSL_SUPPORT |
| 2284 | |
| 2285 | /* basic openssl init */ |
| 2286 | |
| 2287 | SSL_library_init(); |
| 2288 | |
| 2289 | OpenSSL_add_all_algorithms(); |
| 2290 | SSL_load_error_strings(); |
| 2291 | |
Andy Green | 2e24da0 | 2011-03-05 16:12:04 +0000 | [diff] [blame] | 2292 | openssl_websocket_private_data_index = |
Andy Green | 6901cb3 | 2011-02-21 08:06:47 +0000 | [diff] [blame] | 2293 | SSL_get_ex_new_index(0, "libwebsockets", NULL, NULL, NULL); |
| 2294 | |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 2295 | /* |
| 2296 | * Firefox insists on SSLv23 not SSLv3 |
| 2297 | * Konq disables SSLv2 by default now, SSLv23 works |
| 2298 | */ |
| 2299 | |
| 2300 | method = (SSL_METHOD *)SSLv23_server_method(); |
| 2301 | if (!method) { |
| 2302 | fprintf(stderr, "problem creating ssl method: %s\n", |
| 2303 | ERR_error_string(ERR_get_error(), ssl_err_buf)); |
| 2304 | return NULL; |
| 2305 | } |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2306 | context->ssl_ctx = SSL_CTX_new(method); /* create context */ |
| 2307 | if (!context->ssl_ctx) { |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 2308 | fprintf(stderr, "problem creating ssl context: %s\n", |
| 2309 | ERR_error_string(ERR_get_error(), ssl_err_buf)); |
| 2310 | return NULL; |
| 2311 | } |
| 2312 | |
| 2313 | /* client context */ |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2314 | if (port == CONTEXT_PORT_NO_LISTEN) |
| 2315 | { |
| 2316 | method = (SSL_METHOD *)SSLv23_client_method(); |
| 2317 | if (!method) { |
| 2318 | fprintf(stderr, "problem creating ssl method: %s\n", |
| 2319 | ERR_error_string(ERR_get_error(), ssl_err_buf)); |
| 2320 | return NULL; |
| 2321 | } |
| 2322 | /* create context */ |
| 2323 | context->ssl_client_ctx = SSL_CTX_new(method); |
| 2324 | if (!context->ssl_client_ctx) { |
| 2325 | fprintf(stderr, "problem creating ssl context: %s\n", |
| 2326 | ERR_error_string(ERR_get_error(), ssl_err_buf)); |
| 2327 | return NULL; |
| 2328 | } |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 2329 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2330 | /* openssl init for cert verification (for client sockets) */ |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 2331 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2332 | if (!SSL_CTX_load_verify_locations( |
| 2333 | context->ssl_client_ctx, NULL, |
| 2334 | LWS_OPENSSL_CLIENT_CERTS)) |
| 2335 | fprintf(stderr, |
| 2336 | "Unable to load SSL Client certs from %s " |
| 2337 | "(set by --with-client-cert-dir= in configure) -- " |
| 2338 | " client ssl isn't going to work", |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 2339 | LWS_OPENSSL_CLIENT_CERTS); |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2340 | |
| 2341 | /* |
| 2342 | * callback allowing user code to load extra verification certs |
| 2343 | * helping the client to verify server identity |
| 2344 | */ |
| 2345 | |
| 2346 | context->protocols[0].callback(context, NULL, |
| 2347 | LWS_CALLBACK_OPENSSL_LOAD_EXTRA_CLIENT_VERIFY_CERTS, |
| 2348 | context->ssl_client_ctx, NULL, 0); |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 2349 | } |
Andy Green | c6bf2c2 | 2011-02-20 11:10:47 +0000 | [diff] [blame] | 2350 | /* as a server, are we requiring clients to identify themselves? */ |
| 2351 | |
| 2352 | if (options & LWS_SERVER_OPTION_REQUIRE_VALID_OPENSSL_CLIENT_CERT) { |
| 2353 | |
| 2354 | /* absolutely require the client cert */ |
| 2355 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2356 | SSL_CTX_set_verify(context->ssl_ctx, |
Andy Green | 6901cb3 | 2011-02-21 08:06:47 +0000 | [diff] [blame] | 2357 | SSL_VERIFY_PEER | SSL_VERIFY_FAIL_IF_NO_PEER_CERT, |
| 2358 | OpenSSL_verify_callback); |
Andy Green | c6bf2c2 | 2011-02-20 11:10:47 +0000 | [diff] [blame] | 2359 | |
| 2360 | /* |
| 2361 | * give user code a chance to load certs into the server |
| 2362 | * allowing it to verify incoming client certs |
| 2363 | */ |
| 2364 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2365 | context->protocols[0].callback(context, NULL, |
Andy Green | c6bf2c2 | 2011-02-20 11:10:47 +0000 | [diff] [blame] | 2366 | LWS_CALLBACK_OPENSSL_LOAD_EXTRA_SERVER_VERIFY_CERTS, |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2367 | context->ssl_ctx, NULL, 0); |
Andy Green | c6bf2c2 | 2011-02-20 11:10:47 +0000 | [diff] [blame] | 2368 | } |
| 2369 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2370 | if (context->use_ssl) { |
Andy Green | 90c7cbc | 2011-01-27 06:26:52 +0000 | [diff] [blame] | 2371 | |
| 2372 | /* openssl init for server sockets */ |
| 2373 | |
Andy Green | 3faa9c7 | 2010-11-08 17:03:03 +0000 | [diff] [blame] | 2374 | /* set the local certificate from CertFile */ |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2375 | n = SSL_CTX_use_certificate_file(context->ssl_ctx, |
Andy Green | 3faa9c7 | 2010-11-08 17:03:03 +0000 | [diff] [blame] | 2376 | ssl_cert_filepath, SSL_FILETYPE_PEM); |
| 2377 | if (n != 1) { |
| 2378 | fprintf(stderr, "problem getting cert '%s': %s\n", |
| 2379 | ssl_cert_filepath, |
| 2380 | ERR_error_string(ERR_get_error(), ssl_err_buf)); |
Andy Green | e92cd17 | 2011-01-19 13:11:55 +0000 | [diff] [blame] | 2381 | return NULL; |
Andy Green | 3faa9c7 | 2010-11-08 17:03:03 +0000 | [diff] [blame] | 2382 | } |
| 2383 | /* set the private key from KeyFile */ |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2384 | if (SSL_CTX_use_PrivateKey_file(context->ssl_ctx, |
| 2385 | ssl_private_key_filepath, SSL_FILETYPE_PEM) != 1) { |
Andy Green | 018d8eb | 2010-11-08 21:04:23 +0000 | [diff] [blame] | 2386 | fprintf(stderr, "ssl problem getting key '%s': %s\n", |
| 2387 | ssl_private_key_filepath, |
| 2388 | ERR_error_string(ERR_get_error(), ssl_err_buf)); |
Andy Green | e92cd17 | 2011-01-19 13:11:55 +0000 | [diff] [blame] | 2389 | return NULL; |
Andy Green | 3faa9c7 | 2010-11-08 17:03:03 +0000 | [diff] [blame] | 2390 | } |
| 2391 | /* verify private key */ |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2392 | if (!SSL_CTX_check_private_key(context->ssl_ctx)) { |
Andy Green | 018d8eb | 2010-11-08 21:04:23 +0000 | [diff] [blame] | 2393 | fprintf(stderr, "Private SSL key doesn't match cert\n"); |
Andy Green | e92cd17 | 2011-01-19 13:11:55 +0000 | [diff] [blame] | 2394 | return NULL; |
Andy Green | 3faa9c7 | 2010-11-08 17:03:03 +0000 | [diff] [blame] | 2395 | } |
| 2396 | |
| 2397 | /* SSL is happy and has a cert it's content with */ |
| 2398 | } |
| 2399 | #endif |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 2400 | |
Andy Green | df73616 | 2011-01-18 15:39:02 +0000 | [diff] [blame] | 2401 | /* selftest */ |
| 2402 | |
| 2403 | if (lws_b64_selftest()) |
Andy Green | e92cd17 | 2011-01-19 13:11:55 +0000 | [diff] [blame] | 2404 | return NULL; |
Andy Green | df73616 | 2011-01-18 15:39:02 +0000 | [diff] [blame] | 2405 | |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 2406 | /* fd hashtable init */ |
| 2407 | |
| 2408 | for (n = 0; n < FD_HASHTABLE_MODULUS; n++) |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2409 | context->fd_hashtable[n].length = 0; |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 2410 | |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 2411 | /* set up our external listening socket we serve on */ |
Andy Green | 8f037e4 | 2010-12-19 22:13:26 +0000 | [diff] [blame] | 2412 | |
Andy Green | 4739e5c | 2011-01-22 12:51:57 +0000 | [diff] [blame] | 2413 | if (port) { |
Andy Green | 8f037e4 | 2010-12-19 22:13:26 +0000 | [diff] [blame] | 2414 | |
Andy Green | 4739e5c | 2011-01-22 12:51:57 +0000 | [diff] [blame] | 2415 | sockfd = socket(AF_INET, SOCK_STREAM, 0); |
| 2416 | if (sockfd < 0) { |
| 2417 | fprintf(stderr, "ERROR opening socket"); |
| 2418 | return NULL; |
| 2419 | } |
Andy Green | 775c0dd | 2010-10-29 14:15:22 +0100 | [diff] [blame] | 2420 | |
Andy Green | 4739e5c | 2011-01-22 12:51:57 +0000 | [diff] [blame] | 2421 | /* allow us to restart even if old sockets in TIME_WAIT */ |
| 2422 | setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)); |
Andy Green | e77ddd8 | 2010-11-13 10:03:47 +0000 | [diff] [blame] | 2423 | |
Andy Green | 6c93955 | 2011-03-08 08:56:57 +0000 | [diff] [blame^] | 2424 | |
| 2425 | /* Disable Nagle */ |
| 2426 | opt = 1; |
| 2427 | setsockopt(sockfd, SOL_TCP, TCP_NODELAY, &opt, sizeof(opt)); |
| 2428 | |
Andy Green | 4739e5c | 2011-01-22 12:51:57 +0000 | [diff] [blame] | 2429 | bzero((char *) &serv_addr, sizeof(serv_addr)); |
| 2430 | serv_addr.sin_family = AF_INET; |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2431 | if (interf == NULL) |
Andy Green | 32375b7 | 2011-02-19 08:32:53 +0000 | [diff] [blame] | 2432 | serv_addr.sin_addr.s_addr = INADDR_ANY; |
| 2433 | else |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2434 | interface_to_sa(interf, &serv_addr, |
Andy Green | 32375b7 | 2011-02-19 08:32:53 +0000 | [diff] [blame] | 2435 | sizeof(serv_addr)); |
Andy Green | 4739e5c | 2011-01-22 12:51:57 +0000 | [diff] [blame] | 2436 | serv_addr.sin_port = htons(port); |
| 2437 | |
| 2438 | n = bind(sockfd, (struct sockaddr *) &serv_addr, |
| 2439 | sizeof(serv_addr)); |
| 2440 | if (n < 0) { |
| 2441 | fprintf(stderr, "ERROR on binding to port %d (%d %d)\n", |
Andy Green | 8f037e4 | 2010-12-19 22:13:26 +0000 | [diff] [blame] | 2442 | port, n, errno); |
Andy Green | 4739e5c | 2011-01-22 12:51:57 +0000 | [diff] [blame] | 2443 | return NULL; |
| 2444 | } |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 2445 | |
| 2446 | wsi = malloc(sizeof(struct libwebsocket)); |
| 2447 | memset(wsi, 0, sizeof (struct libwebsocket)); |
| 2448 | wsi->sock = sockfd; |
Andy Green | d6e0911 | 2011-03-05 16:12:15 +0000 | [diff] [blame] | 2449 | wsi->count_active_extensions = 0; |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 2450 | wsi->mode = LWS_CONNMODE_SERVER_LISTENER; |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2451 | insert_wsi(context, wsi); |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 2452 | |
| 2453 | listen(sockfd, 5); |
| 2454 | fprintf(stderr, " Listening on port %d\n", port); |
| 2455 | |
| 2456 | /* list in the internal poll array */ |
| 2457 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2458 | context->fds[context->fds_count].fd = sockfd; |
| 2459 | context->fds[context->fds_count++].events = POLLIN; |
Andy Green | 3221f92 | 2011-02-12 13:14:11 +0000 | [diff] [blame] | 2460 | |
| 2461 | /* external POLL support via protocol 0 */ |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2462 | context->protocols[0].callback(context, wsi, |
Andy Green | 3221f92 | 2011-02-12 13:14:11 +0000 | [diff] [blame] | 2463 | LWS_CALLBACK_ADD_POLL_FD, |
| 2464 | (void *)(long)sockfd, NULL, POLLIN); |
| 2465 | |
Andy Green | 8f037e4 | 2010-12-19 22:13:26 +0000 | [diff] [blame] | 2466 | } |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 2467 | |
Andy Green | e77ddd8 | 2010-11-13 10:03:47 +0000 | [diff] [blame] | 2468 | /* drop any root privs for this process */ |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2469 | #ifdef WIN32 |
| 2470 | #else |
Andy Green | 3faa9c7 | 2010-11-08 17:03:03 +0000 | [diff] [blame] | 2471 | if (gid != -1) |
| 2472 | if (setgid(gid)) |
| 2473 | fprintf(stderr, "setgid: %s\n", strerror(errno)); |
| 2474 | if (uid != -1) |
| 2475 | if (setuid(uid)) |
| 2476 | fprintf(stderr, "setuid: %s\n", strerror(errno)); |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2477 | #endif |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 2478 | |
| 2479 | /* set up our internal broadcast trigger sockets per-protocol */ |
| 2480 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2481 | for (context->count_protocols = 0; |
| 2482 | protocols[context->count_protocols].callback; |
| 2483 | context->count_protocols++) { |
| 2484 | protocols[context->count_protocols].owning_server = context; |
| 2485 | protocols[context->count_protocols].protocol_index = |
| 2486 | context->count_protocols; |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 2487 | |
| 2488 | fd = socket(AF_INET, SOCK_STREAM, 0); |
| 2489 | if (fd < 0) { |
| 2490 | fprintf(stderr, "ERROR opening socket"); |
Andy Green | e92cd17 | 2011-01-19 13:11:55 +0000 | [diff] [blame] | 2491 | return NULL; |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 2492 | } |
Andy Green | 8f037e4 | 2010-12-19 22:13:26 +0000 | [diff] [blame] | 2493 | |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 2494 | /* allow us to restart even if old sockets in TIME_WAIT */ |
| 2495 | setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)); |
| 2496 | |
| 2497 | bzero((char *) &serv_addr, sizeof(serv_addr)); |
| 2498 | serv_addr.sin_family = AF_INET; |
| 2499 | serv_addr.sin_addr.s_addr = inet_addr("127.0.0.1"); |
| 2500 | serv_addr.sin_port = 0; /* pick the port for us */ |
| 2501 | |
| 2502 | n = bind(fd, (struct sockaddr *) &serv_addr, sizeof(serv_addr)); |
| 2503 | if (n < 0) { |
Andy Green | 8f037e4 | 2010-12-19 22:13:26 +0000 | [diff] [blame] | 2504 | fprintf(stderr, "ERROR on binding to port %d (%d %d)\n", |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 2505 | port, n, errno); |
Andy Green | e92cd17 | 2011-01-19 13:11:55 +0000 | [diff] [blame] | 2506 | return NULL; |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 2507 | } |
| 2508 | |
| 2509 | slen = sizeof cli_addr; |
| 2510 | n = getsockname(fd, (struct sockaddr *)&cli_addr, &slen); |
| 2511 | if (n < 0) { |
| 2512 | fprintf(stderr, "getsockname failed\n"); |
Andy Green | e92cd17 | 2011-01-19 13:11:55 +0000 | [diff] [blame] | 2513 | return NULL; |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 2514 | } |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2515 | protocols[context->count_protocols].broadcast_socket_port = |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 2516 | ntohs(cli_addr.sin_port); |
| 2517 | listen(fd, 5); |
| 2518 | |
| 2519 | debug(" Protocol %s broadcast socket %d\n", |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2520 | protocols[context->count_protocols].name, |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 2521 | ntohs(cli_addr.sin_port)); |
| 2522 | |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 2523 | /* dummy wsi per broadcast proxy socket */ |
| 2524 | |
| 2525 | wsi = malloc(sizeof(struct libwebsocket)); |
| 2526 | memset(wsi, 0, sizeof (struct libwebsocket)); |
| 2527 | wsi->sock = fd; |
| 2528 | wsi->mode = LWS_CONNMODE_BROADCAST_PROXY_LISTENER; |
Andy Green | d6e0911 | 2011-03-05 16:12:15 +0000 | [diff] [blame] | 2529 | wsi->count_active_extensions = 0; |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 2530 | /* note which protocol we are proxying */ |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2531 | wsi->protocol_index_for_broadcast_proxy = |
| 2532 | context->count_protocols; |
| 2533 | insert_wsi(context, wsi); |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 2534 | |
| 2535 | /* list in internal poll array */ |
| 2536 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2537 | context->fds[context->fds_count].fd = fd; |
| 2538 | context->fds[context->fds_count].events = POLLIN; |
| 2539 | context->fds[context->fds_count].revents = 0; |
| 2540 | context->fds_count++; |
Andy Green | 3221f92 | 2011-02-12 13:14:11 +0000 | [diff] [blame] | 2541 | |
| 2542 | /* external POLL support via protocol 0 */ |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2543 | context->protocols[0].callback(context, wsi, |
Andy Green | 3221f92 | 2011-02-12 13:14:11 +0000 | [diff] [blame] | 2544 | LWS_CALLBACK_ADD_POLL_FD, |
| 2545 | (void *)(long)fd, NULL, POLLIN); |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 2546 | } |
| 2547 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2548 | return context; |
Andy Green | e92cd17 | 2011-01-19 13:11:55 +0000 | [diff] [blame] | 2549 | } |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 2550 | |
Andy Green | 4739e5c | 2011-01-22 12:51:57 +0000 | [diff] [blame] | 2551 | |
Andy Green | ed11a02 | 2011-01-20 10:23:50 +0000 | [diff] [blame] | 2552 | #ifndef LWS_NO_FORK |
| 2553 | |
Andy Green | e92cd17 | 2011-01-19 13:11:55 +0000 | [diff] [blame] | 2554 | /** |
| 2555 | * libwebsockets_fork_service_loop() - Optional helper function forks off |
| 2556 | * a process for the websocket server loop. |
Andy Green | 6964bb5 | 2011-01-23 16:50:33 +0000 | [diff] [blame] | 2557 | * You don't have to use this but if not, you |
| 2558 | * have to make sure you are calling |
| 2559 | * libwebsocket_service periodically to service |
| 2560 | * the websocket traffic |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2561 | * @context: server context returned by creation function |
Andy Green | e92cd17 | 2011-01-19 13:11:55 +0000 | [diff] [blame] | 2562 | */ |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 2563 | |
Andy Green | e92cd17 | 2011-01-19 13:11:55 +0000 | [diff] [blame] | 2564 | int |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2565 | libwebsockets_fork_service_loop(struct libwebsocket_context *context) |
Andy Green | e92cd17 | 2011-01-19 13:11:55 +0000 | [diff] [blame] | 2566 | { |
Andy Green | e92cd17 | 2011-01-19 13:11:55 +0000 | [diff] [blame] | 2567 | int fd; |
| 2568 | struct sockaddr_in cli_addr; |
| 2569 | int n; |
Andy Green | 3221f92 | 2011-02-12 13:14:11 +0000 | [diff] [blame] | 2570 | int p; |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 2571 | |
Andy Green | ed11a02 | 2011-01-20 10:23:50 +0000 | [diff] [blame] | 2572 | n = fork(); |
| 2573 | if (n < 0) |
| 2574 | return n; |
| 2575 | |
| 2576 | if (!n) { |
| 2577 | |
| 2578 | /* main process context */ |
| 2579 | |
Andy Green | 3221f92 | 2011-02-12 13:14:11 +0000 | [diff] [blame] | 2580 | /* |
| 2581 | * set up the proxy sockets to allow broadcast from |
| 2582 | * service process context |
| 2583 | */ |
| 2584 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2585 | for (p = 0; p < context->count_protocols; p++) { |
Andy Green | ed11a02 | 2011-01-20 10:23:50 +0000 | [diff] [blame] | 2586 | fd = socket(AF_INET, SOCK_STREAM, 0); |
| 2587 | if (fd < 0) { |
| 2588 | fprintf(stderr, "Unable to create socket\n"); |
| 2589 | return -1; |
| 2590 | } |
| 2591 | cli_addr.sin_family = AF_INET; |
| 2592 | cli_addr.sin_port = htons( |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2593 | context->protocols[p].broadcast_socket_port); |
Andy Green | ed11a02 | 2011-01-20 10:23:50 +0000 | [diff] [blame] | 2594 | cli_addr.sin_addr.s_addr = inet_addr("127.0.0.1"); |
| 2595 | n = connect(fd, (struct sockaddr *)&cli_addr, |
| 2596 | sizeof cli_addr); |
| 2597 | if (n < 0) { |
| 2598 | fprintf(stderr, "Unable to connect to " |
| 2599 | "broadcast socket %d, %s\n", |
Andy Green | 3221f92 | 2011-02-12 13:14:11 +0000 | [diff] [blame] | 2600 | n, strerror(errno)); |
Andy Green | ed11a02 | 2011-01-20 10:23:50 +0000 | [diff] [blame] | 2601 | return -1; |
| 2602 | } |
| 2603 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2604 | context->protocols[p].broadcast_socket_user_fd = fd; |
Andy Green | ed11a02 | 2011-01-20 10:23:50 +0000 | [diff] [blame] | 2605 | } |
| 2606 | |
Andy Green | e92cd17 | 2011-01-19 13:11:55 +0000 | [diff] [blame] | 2607 | return 0; |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 2608 | } |
| 2609 | |
| 2610 | /* we want a SIGHUP when our parent goes down */ |
| 2611 | prctl(PR_SET_PDEATHSIG, SIGHUP); |
| 2612 | |
| 2613 | /* in this forked process, sit and service websocket connections */ |
Andy Green | 8f037e4 | 2010-12-19 22:13:26 +0000 | [diff] [blame] | 2614 | |
Andy Green | e92cd17 | 2011-01-19 13:11:55 +0000 | [diff] [blame] | 2615 | while (1) |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2616 | if (libwebsocket_service(context, 1000)) |
Andy Green | e92cd17 | 2011-01-19 13:11:55 +0000 | [diff] [blame] | 2617 | return -1; |
Andy Green | 8f037e4 | 2010-12-19 22:13:26 +0000 | [diff] [blame] | 2618 | |
Andy Green | 251f6fa | 2010-11-03 11:13:06 +0000 | [diff] [blame] | 2619 | return 0; |
Andy Green | ff95d7a | 2010-10-28 22:36:01 +0100 | [diff] [blame] | 2620 | } |
| 2621 | |
Andy Green | ed11a02 | 2011-01-20 10:23:50 +0000 | [diff] [blame] | 2622 | #endif |
| 2623 | |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 2624 | /** |
| 2625 | * libwebsockets_get_protocol() - Returns a protocol pointer from a websocket |
Andy Green | 8f037e4 | 2010-12-19 22:13:26 +0000 | [diff] [blame] | 2626 | * connection. |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 2627 | * @wsi: pointer to struct websocket you want to know the protocol of |
| 2628 | * |
Andy Green | 8f037e4 | 2010-12-19 22:13:26 +0000 | [diff] [blame] | 2629 | * |
| 2630 | * This is useful to get the protocol to broadcast back to from inside |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 2631 | * the callback. |
| 2632 | */ |
Andy Green | ab990e4 | 2010-10-31 12:42:52 +0000 | [diff] [blame] | 2633 | |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 2634 | const struct libwebsocket_protocols * |
| 2635 | libwebsockets_get_protocol(struct libwebsocket *wsi) |
| 2636 | { |
| 2637 | return wsi->protocol; |
| 2638 | } |
| 2639 | |
| 2640 | /** |
Andy Green | e92cd17 | 2011-01-19 13:11:55 +0000 | [diff] [blame] | 2641 | * libwebsockets_broadcast() - Sends a buffer to the callback for all active |
Andy Green | 8f037e4 | 2010-12-19 22:13:26 +0000 | [diff] [blame] | 2642 | * connections of the given protocol. |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 2643 | * @protocol: pointer to the protocol you will broadcast to all members of |
| 2644 | * @buf: buffer containing the data to be broadcase. NOTE: this has to be |
Andy Green | 8f037e4 | 2010-12-19 22:13:26 +0000 | [diff] [blame] | 2645 | * allocated with LWS_SEND_BUFFER_PRE_PADDING valid bytes before |
| 2646 | * the pointer and LWS_SEND_BUFFER_POST_PADDING afterwards in the |
| 2647 | * case you are calling this function from callback context. |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 2648 | * @len: length of payload data in buf, starting from buf. |
Andy Green | 8f037e4 | 2010-12-19 22:13:26 +0000 | [diff] [blame] | 2649 | * |
| 2650 | * This function allows bulk sending of a packet to every connection using |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 2651 | * the given protocol. It does not send the data directly; instead it calls |
| 2652 | * the callback with a reason type of LWS_CALLBACK_BROADCAST. If the callback |
| 2653 | * wants to actually send the data for that connection, the callback itself |
| 2654 | * should call libwebsocket_write(). |
| 2655 | * |
| 2656 | * libwebsockets_broadcast() can be called from another fork context without |
| 2657 | * having to take any care about data visibility between the processes, it'll |
| 2658 | * "just work". |
| 2659 | */ |
| 2660 | |
| 2661 | |
| 2662 | int |
Andy Green | 8f037e4 | 2010-12-19 22:13:26 +0000 | [diff] [blame] | 2663 | libwebsockets_broadcast(const struct libwebsocket_protocols *protocol, |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 2664 | unsigned char *buf, size_t len) |
| 2665 | { |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2666 | struct libwebsocket_context *context = protocol->owning_server; |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 2667 | int n; |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 2668 | int m; |
| 2669 | struct libwebsocket * wsi; |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 2670 | |
| 2671 | if (!protocol->broadcast_socket_user_fd) { |
| 2672 | /* |
Andy Green | e92cd17 | 2011-01-19 13:11:55 +0000 | [diff] [blame] | 2673 | * We are either running unforked / flat, or we are being |
| 2674 | * called from poll thread context |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 2675 | * eg, from a callback. In that case don't use sockets for |
| 2676 | * broadcast IPC (since we can't open a socket connection to |
| 2677 | * a socket listening on our own thread) but directly do the |
| 2678 | * send action. |
| 2679 | * |
| 2680 | * Locking is not needed because we are by definition being |
| 2681 | * called in the poll thread context and are serialized. |
| 2682 | */ |
| 2683 | |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 2684 | for (n = 0; n < FD_HASHTABLE_MODULUS; n++) { |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 2685 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2686 | for (m = 0; m < context->fd_hashtable[n].length; m++) { |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 2687 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2688 | wsi = context->fd_hashtable[n].wsi[m]; |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 2689 | |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 2690 | if (wsi->mode != LWS_CONNMODE_WS_SERVING) |
| 2691 | continue; |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 2692 | |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 2693 | /* |
| 2694 | * never broadcast to |
| 2695 | * non-established connections |
| 2696 | */ |
| 2697 | if (wsi->state != WSI_STATE_ESTABLISHED) |
| 2698 | continue; |
| 2699 | |
| 2700 | /* only broadcast to guys using |
| 2701 | * requested protocol |
| 2702 | */ |
| 2703 | if (wsi->protocol != protocol) |
| 2704 | continue; |
| 2705 | |
Peter Hinz | 56885f3 | 2011-03-02 22:03:47 +0000 | [diff] [blame] | 2706 | wsi->protocol->callback(context, wsi, |
Andy Green | 8f037e4 | 2010-12-19 22:13:26 +0000 | [diff] [blame] | 2707 | LWS_CALLBACK_BROADCAST, |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 2708 | wsi->user_space, |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 2709 | buf, len); |
Andy Green | 0d33833 | 2011-02-12 11:57:43 +0000 | [diff] [blame] | 2710 | } |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 2711 | } |
| 2712 | |
| 2713 | return 0; |
| 2714 | } |
| 2715 | |
Andy Green | 0ca6a17 | 2010-12-19 20:50:01 +0000 | [diff] [blame] | 2716 | /* |
| 2717 | * We're being called from a different process context than the server |
| 2718 | * loop. Instead of broadcasting directly, we send our |
| 2719 | * payload on a socket to do the IPC; the server process will serialize |
| 2720 | * the broadcast action in its main poll() loop. |
| 2721 | * |
| 2722 | * There's one broadcast socket listening for each protocol supported |
| 2723 | * set up when the websocket server initializes |
| 2724 | */ |
| 2725 | |
Andy Green | 6964bb5 | 2011-01-23 16:50:33 +0000 | [diff] [blame] | 2726 | n = send(protocol->broadcast_socket_user_fd, buf, len, MSG_NOSIGNAL); |
Andy Green | b45993c | 2010-12-18 15:13:50 +0000 | [diff] [blame] | 2727 | |
| 2728 | return n; |
| 2729 | } |
Andy Green | 82c3d54 | 2011-03-07 21:16:31 +0000 | [diff] [blame] | 2730 | |
| 2731 | int |
| 2732 | libwebsocket_is_final_fragment(struct libwebsocket *wsi) |
| 2733 | { |
| 2734 | return wsi->final; |
| 2735 | } |