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