Andy Green | 7c212cc | 2010-11-08 20:20:42 +0000 | [diff] [blame] | 1 | /* |
| 2 | * libwebsockets - small server side websockets and web server implementation |
Andy Green | e77ddd8 | 2010-11-13 10:03:47 +0000 | [diff] [blame] | 3 | * |
Andy Green | a1ce6be | 2013-01-18 11:43:21 +0800 | [diff] [blame] | 4 | * Copyright (C) 2010-2013 Andy Green <andy@warmcat.com> |
Andy Green | 7c212cc | 2010-11-08 20:20:42 +0000 | [diff] [blame] | 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 |
| 20 | */ |
| 21 | |
| 22 | #include "private-libwebsockets.h" |
| 23 | |
Andy Green | 6d1fcb7 | 2013-01-18 01:55:48 +0800 | [diff] [blame] | 24 | unsigned char lextable[] = { |
Andy Green | cc13c6f | 2013-11-09 10:09:09 +0800 | [diff] [blame] | 25 | #include "lextable.h" |
Andy Green | 6d1fcb7 | 2013-01-18 01:55:48 +0800 | [diff] [blame] | 26 | }; |
| 27 | |
Andy Green | bbc5c07 | 2014-03-09 11:49:21 +0800 | [diff] [blame^] | 28 | #define FAIL_CHAR 0x08 |
| 29 | |
Andy Green | 6d1fcb7 | 2013-01-18 01:55:48 +0800 | [diff] [blame] | 30 | int lextable_decode(int pos, char c) |
| 31 | { |
Andy Green | bbc5c07 | 2014-03-09 11:49:21 +0800 | [diff] [blame^] | 32 | |
| 33 | c = tolower(c); |
| 34 | |
| 35 | while (1) { |
| 36 | if (lextable[pos] & (1 << 7)) { /* 1-byte, fail on mismatch */ |
| 37 | if ((lextable[pos] & 0x7f) != c) |
| 38 | return -1; |
| 39 | /* fall thru */ |
| 40 | pos++; |
| 41 | if (lextable[pos] == FAIL_CHAR) |
| 42 | return -1; |
Andy Green | 6d1fcb7 | 2013-01-18 01:55:48 +0800 | [diff] [blame] | 43 | return pos; |
Andy Green | bbc5c07 | 2014-03-09 11:49:21 +0800 | [diff] [blame^] | 44 | } else { /* b7 = 0, end or 3-byte */ |
| 45 | if (lextable[pos] < FAIL_CHAR) /* terminal marker */ |
| 46 | return pos; |
Andy Green | 6d1fcb7 | 2013-01-18 01:55:48 +0800 | [diff] [blame] | 47 | |
Andy Green | bbc5c07 | 2014-03-09 11:49:21 +0800 | [diff] [blame^] | 48 | if (lextable[pos] == c) /* goto */ |
| 49 | return pos + (lextable[pos + 1]) + |
| 50 | (lextable[pos + 2] << 8); |
| 51 | /* fall thru goto */ |
| 52 | pos += 3; |
| 53 | /* continue */ |
| 54 | } |
Andy Green | 6d1fcb7 | 2013-01-18 01:55:48 +0800 | [diff] [blame] | 55 | } |
Andy Green | 6d1fcb7 | 2013-01-18 01:55:48 +0800 | [diff] [blame] | 56 | } |
| 57 | |
Andy Green | 16ab318 | 2013-02-10 18:02:31 +0800 | [diff] [blame] | 58 | int lws_allocate_header_table(struct libwebsocket *wsi) |
| 59 | { |
Andy Green | b5b2319 | 2013-02-11 17:13:32 +0800 | [diff] [blame] | 60 | wsi->u.hdr.ah = malloc(sizeof(*wsi->u.hdr.ah)); |
Andy Green | 16ab318 | 2013-02-10 18:02:31 +0800 | [diff] [blame] | 61 | if (wsi->u.hdr.ah == NULL) { |
| 62 | lwsl_err("Out of memory\n"); |
| 63 | return -1; |
| 64 | } |
Andy Green | b5b2319 | 2013-02-11 17:13:32 +0800 | [diff] [blame] | 65 | memset(wsi->u.hdr.ah->frag_index, 0, sizeof(wsi->u.hdr.ah->frag_index)); |
Andy Green | 16ab318 | 2013-02-10 18:02:31 +0800 | [diff] [blame] | 66 | wsi->u.hdr.ah->next_frag_index = 0; |
| 67 | wsi->u.hdr.ah->pos = 0; |
Andy Green | 6d1fcb7 | 2013-01-18 01:55:48 +0800 | [diff] [blame] | 68 | |
Andy Green | 16ab318 | 2013-02-10 18:02:31 +0800 | [diff] [blame] | 69 | return 0; |
| 70 | } |
| 71 | |
Peter Pentchev | 9a4fef7 | 2013-03-30 09:52:21 +0800 | [diff] [blame] | 72 | LWS_VISIBLE int lws_hdr_total_length(struct libwebsocket *wsi, enum lws_token_indexes h) |
Andy Green | 16ab318 | 2013-02-10 18:02:31 +0800 | [diff] [blame] | 73 | { |
| 74 | int n; |
| 75 | int len = 0; |
| 76 | |
| 77 | n = wsi->u.hdr.ah->frag_index[h]; |
| 78 | if (n == 0) |
| 79 | return 0; |
| 80 | |
| 81 | do { |
| 82 | len += wsi->u.hdr.ah->frags[n].len; |
| 83 | n = wsi->u.hdr.ah->frags[n].next_frag_index; |
| 84 | } while (n); |
| 85 | |
| 86 | return len; |
| 87 | } |
| 88 | |
Peter Pentchev | 9a4fef7 | 2013-03-30 09:52:21 +0800 | [diff] [blame] | 89 | LWS_VISIBLE int lws_hdr_copy(struct libwebsocket *wsi, char *dest, int len, |
Andy Green | b5b2319 | 2013-02-11 17:13:32 +0800 | [diff] [blame] | 90 | enum lws_token_indexes h) |
Andy Green | 16ab318 | 2013-02-10 18:02:31 +0800 | [diff] [blame] | 91 | { |
| 92 | int toklen = lws_hdr_total_length(wsi, h); |
| 93 | int n; |
| 94 | |
| 95 | if (toklen >= len) |
| 96 | return -1; |
| 97 | |
| 98 | n = wsi->u.hdr.ah->frag_index[h]; |
| 99 | if (n == 0) |
| 100 | return 0; |
| 101 | |
| 102 | do { |
Andy Green | b5b2319 | 2013-02-11 17:13:32 +0800 | [diff] [blame] | 103 | strcpy(dest, |
| 104 | &wsi->u.hdr.ah->data[wsi->u.hdr.ah->frags[n].offset]); |
Andy Green | 16ab318 | 2013-02-10 18:02:31 +0800 | [diff] [blame] | 105 | dest += wsi->u.hdr.ah->frags[n].len; |
| 106 | n = wsi->u.hdr.ah->frags[n].next_frag_index; |
| 107 | } while (n); |
| 108 | |
| 109 | return toklen; |
| 110 | } |
| 111 | |
Andy Green | b5b2319 | 2013-02-11 17:13:32 +0800 | [diff] [blame] | 112 | char *lws_hdr_simple_ptr(struct libwebsocket *wsi, enum lws_token_indexes h) |
Andy Green | 16ab318 | 2013-02-10 18:02:31 +0800 | [diff] [blame] | 113 | { |
| 114 | int n; |
| 115 | |
| 116 | n = wsi->u.hdr.ah->frag_index[h]; |
| 117 | if (!n) |
| 118 | return NULL; |
| 119 | |
| 120 | return &wsi->u.hdr.ah->data[wsi->u.hdr.ah->frags[n].offset]; |
| 121 | } |
Andy Green | 6d1fcb7 | 2013-01-18 01:55:48 +0800 | [diff] [blame] | 122 | |
Andy Green | b5b2319 | 2013-02-11 17:13:32 +0800 | [diff] [blame] | 123 | int lws_hdr_simple_create(struct libwebsocket *wsi, |
| 124 | enum lws_token_indexes h, const char *s) |
Andy Green | e77fb80 | 2013-02-11 13:04:45 +0800 | [diff] [blame] | 125 | { |
| 126 | wsi->u.hdr.ah->next_frag_index++; |
Andy Green | b5b2319 | 2013-02-11 17:13:32 +0800 | [diff] [blame] | 127 | if (wsi->u.hdr.ah->next_frag_index == |
| 128 | sizeof(wsi->u.hdr.ah->frags) / sizeof(wsi->u.hdr.ah->frags[0])) { |
| 129 | lwsl_warn("More hdr frags than we can deal with, dropping\n"); |
Andy Green | e77fb80 | 2013-02-11 13:04:45 +0800 | [diff] [blame] | 130 | return -1; |
| 131 | } |
| 132 | |
| 133 | wsi->u.hdr.ah->frag_index[h] = wsi->u.hdr.ah->next_frag_index; |
| 134 | |
Andy Green | b5b2319 | 2013-02-11 17:13:32 +0800 | [diff] [blame] | 135 | wsi->u.hdr.ah->frags[wsi->u.hdr.ah->next_frag_index].offset = |
| 136 | wsi->u.hdr.ah->pos; |
Andy Green | e77fb80 | 2013-02-11 13:04:45 +0800 | [diff] [blame] | 137 | wsi->u.hdr.ah->frags[wsi->u.hdr.ah->next_frag_index].len = 0; |
Andy Green | b5b2319 | 2013-02-11 17:13:32 +0800 | [diff] [blame] | 138 | wsi->u.hdr.ah->frags[wsi->u.hdr.ah->next_frag_index].next_frag_index = |
| 139 | 0; |
Andy Green | e77fb80 | 2013-02-11 13:04:45 +0800 | [diff] [blame] | 140 | |
| 141 | do { |
Andy Green | b5b2319 | 2013-02-11 17:13:32 +0800 | [diff] [blame] | 142 | if (wsi->u.hdr.ah->pos == sizeof(wsi->u.hdr.ah->data)) { |
Andy Green | e77fb80 | 2013-02-11 13:04:45 +0800 | [diff] [blame] | 143 | lwsl_err("Ran out of header data space\n"); |
| 144 | return -1; |
| 145 | } |
| 146 | wsi->u.hdr.ah->data[wsi->u.hdr.ah->pos++] = *s; |
| 147 | if (*s) |
Andy Green | b5b2319 | 2013-02-11 17:13:32 +0800 | [diff] [blame] | 148 | wsi->u.hdr.ah->frags[ |
| 149 | wsi->u.hdr.ah->next_frag_index].len++; |
Andy Green | e77fb80 | 2013-02-11 13:04:45 +0800 | [diff] [blame] | 150 | } while (*s++); |
| 151 | |
| 152 | return 0; |
| 153 | } |
| 154 | |
Andy Green | b1a9e50 | 2013-11-10 15:15:21 +0800 | [diff] [blame] | 155 | static char char_to_hex(const char c) |
| 156 | { |
| 157 | if (c >= '0' && c <= '9') |
| 158 | return c - '0'; |
| 159 | |
| 160 | if (c >= 'a' && c <= 'f') |
| 161 | return c - 'a' + 10; |
| 162 | |
| 163 | if (c >= 'A' && c <= 'F') |
| 164 | return c - 'A' + 10; |
| 165 | |
| 166 | return -1; |
| 167 | } |
| 168 | |
| 169 | static int issue_char(struct libwebsocket *wsi, unsigned char c) |
| 170 | { |
| 171 | if (wsi->u.hdr.ah->pos == sizeof(wsi->u.hdr.ah->data)) { |
| 172 | lwsl_warn("excessive header content\n"); |
| 173 | return -1; |
| 174 | } |
| 175 | wsi->u.hdr.ah->data[wsi->u.hdr.ah->pos++] = c; |
| 176 | if (c) |
| 177 | wsi->u.hdr.ah->frags[wsi->u.hdr.ah->next_frag_index].len++; |
| 178 | |
| 179 | return 0; |
| 180 | } |
| 181 | |
Andy Green | 7c212cc | 2010-11-08 20:20:42 +0000 | [diff] [blame] | 182 | int libwebsocket_parse(struct libwebsocket *wsi, unsigned char c) |
| 183 | { |
| 184 | int n; |
| 185 | |
Andy Green | 623a98d | 2013-01-21 11:04:23 +0800 | [diff] [blame] | 186 | switch (wsi->u.hdr.parser_state) { |
Andy Green | 7c212cc | 2010-11-08 20:20:42 +0000 | [diff] [blame] | 187 | case WSI_TOKEN_GET_URI: |
kapejod | ce64fb0 | 2013-11-19 13:38:16 +0100 | [diff] [blame] | 188 | case WSI_TOKEN_POST_URI: |
Andy Green | 7c212cc | 2010-11-08 20:20:42 +0000 | [diff] [blame] | 189 | case WSI_TOKEN_HOST: |
| 190 | case WSI_TOKEN_CONNECTION: |
| 191 | case WSI_TOKEN_KEY1: |
| 192 | case WSI_TOKEN_KEY2: |
| 193 | case WSI_TOKEN_PROTOCOL: |
| 194 | case WSI_TOKEN_UPGRADE: |
| 195 | case WSI_TOKEN_ORIGIN: |
Andy Green | 4739e5c | 2011-01-22 12:51:57 +0000 | [diff] [blame] | 196 | case WSI_TOKEN_SWORIGIN: |
Andy Green | ce510c6 | 2010-11-11 12:48:13 +0000 | [diff] [blame] | 197 | case WSI_TOKEN_DRAFT: |
Andy Green | 7c212cc | 2010-11-08 20:20:42 +0000 | [diff] [blame] | 198 | case WSI_TOKEN_CHALLENGE: |
Andy Green | d1b11e3 | 2011-01-18 15:39:02 +0000 | [diff] [blame] | 199 | case WSI_TOKEN_KEY: |
| 200 | case WSI_TOKEN_VERSION: |
Andy Green | 4739e5c | 2011-01-22 12:51:57 +0000 | [diff] [blame] | 201 | case WSI_TOKEN_ACCEPT: |
| 202 | case WSI_TOKEN_NONCE: |
Andy Green | 18910c5 | 2011-02-09 08:58:42 +0000 | [diff] [blame] | 203 | case WSI_TOKEN_EXTENSIONS: |
Andy Green | 4739e5c | 2011-01-22 12:51:57 +0000 | [diff] [blame] | 204 | case WSI_TOKEN_HTTP: |
Andy Green | cc13c6f | 2013-11-09 10:09:09 +0800 | [diff] [blame] | 205 | case WSI_TOKEN_HTTP_ACCEPT: |
| 206 | case WSI_TOKEN_HTTP_IF_MODIFIED_SINCE: |
| 207 | case WSI_TOKEN_HTTP_ACCEPT_ENCODING: |
| 208 | case WSI_TOKEN_HTTP_ACCEPT_LANGUAGE: |
| 209 | case WSI_TOKEN_HTTP_PRAGMA: |
| 210 | case WSI_TOKEN_HTTP_CACHE_CONTROL: |
| 211 | case WSI_TOKEN_HTTP_AUTHORIZATION: |
| 212 | case WSI_TOKEN_HTTP_COOKIE: |
kapejod | ce64fb0 | 2013-11-19 13:38:16 +0100 | [diff] [blame] | 213 | case WSI_TOKEN_HTTP_CONTENT_LENGTH: |
Andy Green | cc13c6f | 2013-11-09 10:09:09 +0800 | [diff] [blame] | 214 | case WSI_TOKEN_HTTP_CONTENT_TYPE: |
| 215 | case WSI_TOKEN_HTTP_DATE: |
| 216 | case WSI_TOKEN_HTTP_RANGE: |
| 217 | case WSI_TOKEN_HTTP_REFERER: |
| 218 | |
Andy Green | a41314f | 2011-05-23 10:00:03 +0100 | [diff] [blame] | 219 | |
Andy Green | b5b2319 | 2013-02-11 17:13:32 +0800 | [diff] [blame] | 220 | lwsl_parser("WSI_TOK_(%d) '%c'\n", wsi->u.hdr.parser_state, c); |
Andy Green | 7c212cc | 2010-11-08 20:20:42 +0000 | [diff] [blame] | 221 | |
| 222 | /* collect into malloc'd buffers */ |
Andy Green | 16ab318 | 2013-02-10 18:02:31 +0800 | [diff] [blame] | 223 | /* optional initial space swallow */ |
Andy Green | b5b2319 | 2013-02-11 17:13:32 +0800 | [diff] [blame] | 224 | if (!wsi->u.hdr.ah->frags[wsi->u.hdr.ah->frag_index[ |
| 225 | wsi->u.hdr.parser_state]].len && c == ' ') |
Andy Green | 7c212cc | 2010-11-08 20:20:42 +0000 | [diff] [blame] | 226 | break; |
Andy Green | e77ddd8 | 2010-11-13 10:03:47 +0000 | [diff] [blame] | 227 | |
kapejod | ce64fb0 | 2013-11-19 13:38:16 +0100 | [diff] [blame] | 228 | if ((wsi->u.hdr.parser_state != WSI_TOKEN_GET_URI) && (wsi->u.hdr.parser_state != WSI_TOKEN_POST_URI)) |
Andy Green | b1a9e50 | 2013-11-10 15:15:21 +0800 | [diff] [blame] | 229 | goto check_eol; |
| 230 | |
| 231 | /* special URI processing... end at space */ |
| 232 | |
| 233 | if (c == ' ') { |
| 234 | /* enforce starting with / */ |
| 235 | if (!wsi->u.hdr.ah->frags[wsi->u.hdr.ah->next_frag_index].len) |
| 236 | if (issue_char(wsi, '/') < 0) |
| 237 | return -1; |
Andy Green | 16ab318 | 2013-02-10 18:02:31 +0800 | [diff] [blame] | 238 | c = '\0'; |
Andy Green | 623a98d | 2013-01-21 11:04:23 +0800 | [diff] [blame] | 239 | wsi->u.hdr.parser_state = WSI_TOKEN_SKIPPING; |
Andy Green | b1a9e50 | 2013-11-10 15:15:21 +0800 | [diff] [blame] | 240 | goto spill; |
Andy Green | 7c212cc | 2010-11-08 20:20:42 +0000 | [diff] [blame] | 241 | } |
| 242 | |
Andy Green | b1a9e50 | 2013-11-10 15:15:21 +0800 | [diff] [blame] | 243 | /* special URI processing... convert %xx */ |
| 244 | |
| 245 | switch (wsi->u.hdr.ues) { |
| 246 | case URIES_IDLE: |
| 247 | if (c == '%') { |
| 248 | wsi->u.hdr.ues = URIES_SEEN_PERCENT; |
| 249 | goto swallow; |
| 250 | } |
| 251 | break; |
| 252 | case URIES_SEEN_PERCENT: |
| 253 | if (char_to_hex(c) < 0) { |
| 254 | /* regurgitate */ |
| 255 | if (issue_char(wsi, '%') < 0) |
| 256 | return -1; |
| 257 | wsi->u.hdr.ues = URIES_IDLE; |
| 258 | /* continue on to assess c */ |
| 259 | break; |
| 260 | } |
| 261 | wsi->u.hdr.esc_stash = c; |
| 262 | wsi->u.hdr.ues = URIES_SEEN_PERCENT_H1; |
Andy Green | 6f42910 | 2013-11-11 06:14:52 +0800 | [diff] [blame] | 263 | goto swallow; |
Andy Green | b1a9e50 | 2013-11-10 15:15:21 +0800 | [diff] [blame] | 264 | |
| 265 | case URIES_SEEN_PERCENT_H1: |
| 266 | if (char_to_hex(c) < 0) { |
| 267 | /* regurgitate */ |
| 268 | issue_char(wsi, '%'); |
| 269 | wsi->u.hdr.ues = URIES_IDLE; |
| 270 | /* regurgitate + assess */ |
| 271 | if (libwebsocket_parse(wsi, wsi->u.hdr.esc_stash) < 0) |
| 272 | return -1; |
| 273 | /* continue on to assess c */ |
| 274 | break; |
| 275 | } |
| 276 | c = (char_to_hex(wsi->u.hdr.esc_stash) << 4) | |
| 277 | char_to_hex(c); |
Andy Green | 6f42910 | 2013-11-11 06:14:52 +0800 | [diff] [blame] | 278 | wsi->u.hdr.ues = URIES_IDLE; |
Andy Green | b1a9e50 | 2013-11-10 15:15:21 +0800 | [diff] [blame] | 279 | break; |
| 280 | } |
| 281 | |
| 282 | /* |
| 283 | * special URI processing... |
Andy Green | 6f42910 | 2013-11-11 06:14:52 +0800 | [diff] [blame] | 284 | * convert /.. or /... or /../ etc to / |
| 285 | * convert /./ to / |
Andy Green | b1a9e50 | 2013-11-10 15:15:21 +0800 | [diff] [blame] | 286 | * convert // or /// etc to / |
| 287 | * leave /.dir or whatever alone |
| 288 | */ |
| 289 | |
| 290 | switch (wsi->u.hdr.ups) { |
| 291 | case URIPS_IDLE: |
| 292 | /* issue the first / always */ |
| 293 | if (c == '/') |
| 294 | wsi->u.hdr.ups = URIPS_SEEN_SLASH; |
| 295 | break; |
| 296 | case URIPS_SEEN_SLASH: |
| 297 | /* swallow subsequent slashes */ |
| 298 | if (c == '/') |
| 299 | goto swallow; |
| 300 | /* track and swallow the first . after / */ |
| 301 | if (c == '.') { |
| 302 | wsi->u.hdr.ups = URIPS_SEEN_SLASH_DOT; |
| 303 | goto swallow; |
| 304 | } else |
| 305 | wsi->u.hdr.ups = URIPS_IDLE; |
| 306 | break; |
| 307 | case URIPS_SEEN_SLASH_DOT: |
| 308 | /* swallow second . */ |
| 309 | if (c == '.') { |
Andy Green | d3f6873 | 2013-11-13 06:53:21 +0800 | [diff] [blame] | 310 | /* |
| 311 | * back up one dir level if possible |
| 312 | * safe against header fragmentation because |
| 313 | * the method URI can only be in 1 fragment |
| 314 | */ |
| 315 | if (wsi->u.hdr.ah->frags[wsi->u.hdr.ah->next_frag_index].len > 2) { |
| 316 | wsi->u.hdr.ah->pos--; |
| 317 | wsi->u.hdr.ah->frags[wsi->u.hdr.ah->next_frag_index].len--; |
| 318 | do { |
| 319 | wsi->u.hdr.ah->pos--; |
| 320 | wsi->u.hdr.ah->frags[wsi->u.hdr.ah->next_frag_index].len--; |
| 321 | } while (wsi->u.hdr.ah->frags[wsi->u.hdr.ah->next_frag_index].len > 1 && |
| 322 | wsi->u.hdr.ah->data[wsi->u.hdr.ah->pos] != '/'); |
| 323 | } |
Andy Green | b1a9e50 | 2013-11-10 15:15:21 +0800 | [diff] [blame] | 324 | wsi->u.hdr.ups = URIPS_SEEN_SLASH_DOT_DOT; |
| 325 | goto swallow; |
| 326 | } |
Andy Green | 6f42910 | 2013-11-11 06:14:52 +0800 | [diff] [blame] | 327 | /* change /./ to / */ |
| 328 | if (c == '/') { |
| 329 | wsi->u.hdr.ups = URIPS_SEEN_SLASH; |
| 330 | goto swallow; |
| 331 | } |
Andy Green | b1a9e50 | 2013-11-10 15:15:21 +0800 | [diff] [blame] | 332 | /* it was like /.dir ... regurgitate the . */ |
| 333 | wsi->u.hdr.ups = URIPS_IDLE; |
| 334 | issue_char(wsi, '.'); |
| 335 | break; |
| 336 | |
| 337 | case URIPS_SEEN_SLASH_DOT_DOT: |
| 338 | /* swallow prior .. chars and any subsequent . */ |
| 339 | if (c == '.') |
| 340 | goto swallow; |
Andy Green | 6f42910 | 2013-11-11 06:14:52 +0800 | [diff] [blame] | 341 | /* last issued was /, so another / == // */ |
| 342 | if (c == '/') |
| 343 | goto swallow; |
Andy Green | b1a9e50 | 2013-11-10 15:15:21 +0800 | [diff] [blame] | 344 | else /* last we issued was / so SEEN_SLASH */ |
| 345 | wsi->u.hdr.ups = URIPS_SEEN_SLASH; |
| 346 | break; |
Andy Green | 1e3f7b8 | 2013-11-13 07:45:17 +0800 | [diff] [blame] | 347 | case URIPS_ARGUMENTS: |
| 348 | /* leave them alone */ |
| 349 | break; |
Andy Green | b1a9e50 | 2013-11-10 15:15:21 +0800 | [diff] [blame] | 350 | } |
| 351 | |
| 352 | check_eol: |
| 353 | |
Andy Green | 7c212cc | 2010-11-08 20:20:42 +0000 | [diff] [blame] | 354 | /* bail at EOL */ |
Andy Green | b5b2319 | 2013-02-11 17:13:32 +0800 | [diff] [blame] | 355 | if (wsi->u.hdr.parser_state != WSI_TOKEN_CHALLENGE && |
| 356 | c == '\x0d') { |
Andy Green | 16ab318 | 2013-02-10 18:02:31 +0800 | [diff] [blame] | 357 | c = '\0'; |
Andy Green | 623a98d | 2013-01-21 11:04:23 +0800 | [diff] [blame] | 358 | wsi->u.hdr.parser_state = WSI_TOKEN_SKIPPING_SAW_CR; |
Andy Green | 43db045 | 2013-01-10 19:50:35 +0800 | [diff] [blame] | 359 | lwsl_parser("*\n"); |
Andy Green | 7c212cc | 2010-11-08 20:20:42 +0000 | [diff] [blame] | 360 | } |
| 361 | |
Andy Green | 1e3f7b8 | 2013-11-13 07:45:17 +0800 | [diff] [blame] | 362 | if (c == '?') { /* start of URI arguments */ |
| 363 | /* seal off uri header */ |
| 364 | wsi->u.hdr.ah->data[wsi->u.hdr.ah->pos++] = '\0'; |
| 365 | |
| 366 | /* move to using WSI_TOKEN_HTTP_URI_ARGS */ |
| 367 | wsi->u.hdr.ah->next_frag_index++; |
| 368 | wsi->u.hdr.ah->frags[ |
| 369 | wsi->u.hdr.ah->next_frag_index].offset = |
| 370 | wsi->u.hdr.ah->pos; |
| 371 | wsi->u.hdr.ah->frags[ |
| 372 | wsi->u.hdr.ah->next_frag_index].len = 0; |
| 373 | wsi->u.hdr.ah->frags[ |
| 374 | wsi->u.hdr.ah->next_frag_index].next_frag_index = 0; |
| 375 | |
| 376 | wsi->u.hdr.ah->frag_index[WSI_TOKEN_HTTP_URI_ARGS] = |
| 377 | wsi->u.hdr.ah->next_frag_index; |
| 378 | |
| 379 | /* defeat normal uri path processing */ |
| 380 | wsi->u.hdr.ups = URIPS_ARGUMENTS; |
| 381 | goto swallow; |
| 382 | } |
| 383 | |
Andy Green | b1a9e50 | 2013-11-10 15:15:21 +0800 | [diff] [blame] | 384 | spill: |
| 385 | if (issue_char(wsi, c) < 0) |
Andy Green | 16ab318 | 2013-02-10 18:02:31 +0800 | [diff] [blame] | 386 | return -1; |
Andy Green | b1a9e50 | 2013-11-10 15:15:21 +0800 | [diff] [blame] | 387 | swallow: |
Andy Green | d1b11e3 | 2011-01-18 15:39:02 +0000 | [diff] [blame] | 388 | /* per-protocol end of headers management */ |
Andy Green | e77ddd8 | 2010-11-13 10:03:47 +0000 | [diff] [blame] | 389 | |
Andy Green | 16ab318 | 2013-02-10 18:02:31 +0800 | [diff] [blame] | 390 | if (wsi->u.hdr.parser_state == WSI_TOKEN_CHALLENGE) |
| 391 | goto set_parsing_complete; |
Andy Green | a41314f | 2011-05-23 10:00:03 +0100 | [diff] [blame] | 392 | break; |
| 393 | |
Andy Green | 7c212cc | 2010-11-08 20:20:42 +0000 | [diff] [blame] | 394 | /* collecting and checking a name part */ |
| 395 | case WSI_TOKEN_NAME_PART: |
Andy Green | 43db045 | 2013-01-10 19:50:35 +0800 | [diff] [blame] | 396 | lwsl_parser("WSI_TOKEN_NAME_PART '%c'\n", c); |
Andy Green | 7c212cc | 2010-11-08 20:20:42 +0000 | [diff] [blame] | 397 | |
Andy Green | b5b2319 | 2013-02-11 17:13:32 +0800 | [diff] [blame] | 398 | wsi->u.hdr.lextable_pos = |
| 399 | lextable_decode(wsi->u.hdr.lextable_pos, c); |
Andy Green | 16ab318 | 2013-02-10 18:02:31 +0800 | [diff] [blame] | 400 | |
Andy Green | e4dffc9 | 2013-02-04 09:24:18 +0800 | [diff] [blame] | 401 | if (wsi->u.hdr.lextable_pos < 0) { |
| 402 | /* this is not a header we know about */ |
kapejod | ce64fb0 | 2013-11-19 13:38:16 +0100 | [diff] [blame] | 403 | if (wsi->u.hdr.ah->frag_index[WSI_TOKEN_GET_URI] || wsi->u.hdr.ah->frag_index[WSI_TOKEN_POST_URI] || |
Andy Green | 646c98a | 2013-03-09 09:09:05 +0800 | [diff] [blame] | 404 | wsi->u.hdr.ah->frag_index[WSI_TOKEN_HTTP]) { |
Andy Green | b5b2319 | 2013-02-11 17:13:32 +0800 | [diff] [blame] | 405 | /* |
| 406 | * altready had the method, no idea what |
| 407 | * this crap is, ignore |
| 408 | */ |
Andy Green | e4dffc9 | 2013-02-04 09:24:18 +0800 | [diff] [blame] | 409 | wsi->u.hdr.parser_state = WSI_TOKEN_SKIPPING; |
| 410 | break; |
| 411 | } |
Andy Green | 3ee9b31 | 2013-02-12 12:52:39 +0800 | [diff] [blame] | 412 | /* |
| 413 | * hm it's an unknown http method in fact, |
| 414 | * treat as dangerous |
| 415 | */ |
| 416 | |
| 417 | lwsl_info("Unknown method - dropping\n"); |
| 418 | return -1; |
Andy Green | e4dffc9 | 2013-02-04 09:24:18 +0800 | [diff] [blame] | 419 | } |
Andy Green | bbc5c07 | 2014-03-09 11:49:21 +0800 | [diff] [blame^] | 420 | if (lextable[wsi->u.hdr.lextable_pos] < FAIL_CHAR) { |
Andy Green | 6d1fcb7 | 2013-01-18 01:55:48 +0800 | [diff] [blame] | 421 | |
Andy Green | e4dffc9 | 2013-02-04 09:24:18 +0800 | [diff] [blame] | 422 | /* terminal state */ |
| 423 | |
Andy Green | bbc5c07 | 2014-03-09 11:49:21 +0800 | [diff] [blame^] | 424 | n = (lextable[wsi->u.hdr.lextable_pos] << 8) | lextable[wsi->u.hdr.lextable_pos + 1]; |
Andy Green | 6d1fcb7 | 2013-01-18 01:55:48 +0800 | [diff] [blame] | 425 | |
Andy Green | cc7cb68 | 2013-02-18 10:22:42 +0800 | [diff] [blame] | 426 | lwsl_parser("known hdr %d\n", n); |
Andy Green | fd96330 | 2012-04-03 17:02:20 +0200 | [diff] [blame] | 427 | |
Andy Green | 94f9465 | 2013-02-12 13:10:19 +0800 | [diff] [blame] | 428 | if (n == WSI_TOKEN_GET_URI && |
| 429 | wsi->u.hdr.ah->frag_index[WSI_TOKEN_GET_URI]) { |
| 430 | lwsl_warn("Duplicated GET\n"); |
| 431 | return -1; |
kapejod | ce64fb0 | 2013-11-19 13:38:16 +0100 | [diff] [blame] | 432 | } else if (n == WSI_TOKEN_POST_URI && |
| 433 | wsi->u.hdr.ah->frag_index[WSI_TOKEN_POST_URI]) { |
| 434 | lwsl_warn("Duplicated POST\n"); |
| 435 | return -1; |
Andy Green | 94f9465 | 2013-02-12 13:10:19 +0800 | [diff] [blame] | 436 | } |
| 437 | |
Andy Green | fd96330 | 2012-04-03 17:02:20 +0200 | [diff] [blame] | 438 | /* |
| 439 | * WSORIGIN is protocol equiv to ORIGIN, |
| 440 | * JWebSocket likes to send it, map to ORIGIN |
| 441 | */ |
| 442 | if (n == WSI_TOKEN_SWORIGIN) |
| 443 | n = WSI_TOKEN_ORIGIN; |
| 444 | |
Andy Green | 16ab318 | 2013-02-10 18:02:31 +0800 | [diff] [blame] | 445 | wsi->u.hdr.parser_state = (enum lws_token_indexes) |
| 446 | (WSI_TOKEN_GET_URI + n); |
| 447 | if (wsi->u.hdr.parser_state == WSI_TOKEN_CHALLENGE) |
| 448 | goto set_parsing_complete; |
Andy Green | 6964bb5 | 2011-01-23 16:50:33 +0000 | [diff] [blame] | 449 | |
Andy Green | 16ab318 | 2013-02-10 18:02:31 +0800 | [diff] [blame] | 450 | goto start_fragment; |
| 451 | } |
| 452 | break; |
Nick Dowell | 3059263 | 2012-04-05 10:31:48 +0800 | [diff] [blame] | 453 | |
Andy Green | 16ab318 | 2013-02-10 18:02:31 +0800 | [diff] [blame] | 454 | start_fragment: |
| 455 | wsi->u.hdr.ah->next_frag_index++; |
Andy Green | b5b2319 | 2013-02-11 17:13:32 +0800 | [diff] [blame] | 456 | if (wsi->u.hdr.ah->next_frag_index == |
| 457 | sizeof(wsi->u.hdr.ah->frags) / |
| 458 | sizeof(wsi->u.hdr.ah->frags[0])) { |
| 459 | lwsl_warn("More hdr frags than we can deal with\n"); |
Andy Green | 16ab318 | 2013-02-10 18:02:31 +0800 | [diff] [blame] | 460 | return -1; |
Andy Green | 7c212cc | 2010-11-08 20:20:42 +0000 | [diff] [blame] | 461 | } |
| 462 | |
Andy Green | b5b2319 | 2013-02-11 17:13:32 +0800 | [diff] [blame] | 463 | wsi->u.hdr.ah->frags[wsi->u.hdr.ah->next_frag_index].offset = |
| 464 | wsi->u.hdr.ah->pos; |
Andy Green | 16ab318 | 2013-02-10 18:02:31 +0800 | [diff] [blame] | 465 | wsi->u.hdr.ah->frags[wsi->u.hdr.ah->next_frag_index].len = 0; |
Andy Green | b5b2319 | 2013-02-11 17:13:32 +0800 | [diff] [blame] | 466 | wsi->u.hdr.ah->frags[ |
| 467 | wsi->u.hdr.ah->next_frag_index].next_frag_index = 0; |
Andy Green | 16ab318 | 2013-02-10 18:02:31 +0800 | [diff] [blame] | 468 | |
| 469 | n = wsi->u.hdr.ah->frag_index[wsi->u.hdr.parser_state]; |
| 470 | if (!n) { /* first fragment */ |
| 471 | wsi->u.hdr.ah->frag_index[wsi->u.hdr.parser_state] = |
| 472 | wsi->u.hdr.ah->next_frag_index; |
Andy Green | cc13c6f | 2013-11-09 10:09:09 +0800 | [diff] [blame] | 473 | break; |
| 474 | } |
| 475 | /* continuation */ |
| 476 | while (wsi->u.hdr.ah->frags[n].next_frag_index) |
Andy Green | 16ab318 | 2013-02-10 18:02:31 +0800 | [diff] [blame] | 477 | n = wsi->u.hdr.ah->frags[n].next_frag_index; |
Andy Green | cc13c6f | 2013-11-09 10:09:09 +0800 | [diff] [blame] | 478 | wsi->u.hdr.ah->frags[n].next_frag_index = |
Andy Green | 16ab318 | 2013-02-10 18:02:31 +0800 | [diff] [blame] | 479 | wsi->u.hdr.ah->next_frag_index; |
| 480 | |
Andy Green | cc13c6f | 2013-11-09 10:09:09 +0800 | [diff] [blame] | 481 | if (wsi->u.hdr.ah->pos == sizeof(wsi->u.hdr.ah->data)) { |
| 482 | lwsl_warn("excessive header content\n"); |
| 483 | return -1; |
Andy Green | 2b57a34 | 2013-02-06 15:15:25 +0900 | [diff] [blame] | 484 | } |
Andy Green | 7c212cc | 2010-11-08 20:20:42 +0000 | [diff] [blame] | 485 | |
Andy Green | cc13c6f | 2013-11-09 10:09:09 +0800 | [diff] [blame] | 486 | wsi->u.hdr.ah->data[wsi->u.hdr.ah->pos++] = ' '; |
| 487 | wsi->u.hdr.ah->frags[wsi->u.hdr.ah->next_frag_index].len++; |
Andy Green | e4dffc9 | 2013-02-04 09:24:18 +0800 | [diff] [blame] | 488 | break; |
Andy Green | e77ddd8 | 2010-11-13 10:03:47 +0000 | [diff] [blame] | 489 | |
Andy Green | 7c212cc | 2010-11-08 20:20:42 +0000 | [diff] [blame] | 490 | /* skipping arg part of a name we didn't recognize */ |
| 491 | case WSI_TOKEN_SKIPPING: |
Andy Green | 43db045 | 2013-01-10 19:50:35 +0800 | [diff] [blame] | 492 | lwsl_parser("WSI_TOKEN_SKIPPING '%c'\n", c); |
kapejod | ce64fb0 | 2013-11-19 13:38:16 +0100 | [diff] [blame] | 493 | |
Andy Green | 7c212cc | 2010-11-08 20:20:42 +0000 | [diff] [blame] | 494 | if (c == '\x0d') |
Andy Green | 623a98d | 2013-01-21 11:04:23 +0800 | [diff] [blame] | 495 | wsi->u.hdr.parser_state = WSI_TOKEN_SKIPPING_SAW_CR; |
Andy Green | 7c212cc | 2010-11-08 20:20:42 +0000 | [diff] [blame] | 496 | break; |
Andy Green | 177ca78 | 2013-02-04 09:09:19 +0800 | [diff] [blame] | 497 | |
Andy Green | 7c212cc | 2010-11-08 20:20:42 +0000 | [diff] [blame] | 498 | case WSI_TOKEN_SKIPPING_SAW_CR: |
Andy Green | 43db045 | 2013-01-10 19:50:35 +0800 | [diff] [blame] | 499 | lwsl_parser("WSI_TOKEN_SKIPPING_SAW_CR '%c'\n", c); |
Andy Green | 6d1fcb7 | 2013-01-18 01:55:48 +0800 | [diff] [blame] | 500 | if (c == '\x0a') { |
Andy Green | 623a98d | 2013-01-21 11:04:23 +0800 | [diff] [blame] | 501 | wsi->u.hdr.parser_state = WSI_TOKEN_NAME_PART; |
| 502 | wsi->u.hdr.lextable_pos = 0; |
Andy Green | 6d1fcb7 | 2013-01-18 01:55:48 +0800 | [diff] [blame] | 503 | } else |
Andy Green | 623a98d | 2013-01-21 11:04:23 +0800 | [diff] [blame] | 504 | wsi->u.hdr.parser_state = WSI_TOKEN_SKIPPING; |
Andy Green | 7c212cc | 2010-11-08 20:20:42 +0000 | [diff] [blame] | 505 | break; |
| 506 | /* we're done, ignore anything else */ |
kapejod | ce64fb0 | 2013-11-19 13:38:16 +0100 | [diff] [blame] | 507 | |
Andy Green | 7c212cc | 2010-11-08 20:20:42 +0000 | [diff] [blame] | 508 | case WSI_PARSING_COMPLETE: |
Andy Green | 43db045 | 2013-01-10 19:50:35 +0800 | [diff] [blame] | 509 | lwsl_parser("WSI_PARSING_COMPLETE '%c'\n", c); |
Andy Green | 7c212cc | 2010-11-08 20:20:42 +0000 | [diff] [blame] | 510 | break; |
Andy Green | e77ddd8 | 2010-11-13 10:03:47 +0000 | [diff] [blame] | 511 | |
Andy Green | 7c212cc | 2010-11-08 20:20:42 +0000 | [diff] [blame] | 512 | default: /* keep gcc happy */ |
| 513 | break; |
| 514 | } |
Andy Green | e77ddd8 | 2010-11-13 10:03:47 +0000 | [diff] [blame] | 515 | |
Andy Green | 7c212cc | 2010-11-08 20:20:42 +0000 | [diff] [blame] | 516 | return 0; |
Andy Green | 177ca78 | 2013-02-04 09:09:19 +0800 | [diff] [blame] | 517 | |
| 518 | set_parsing_complete: |
| 519 | |
Andy Green | 16ab318 | 2013-02-10 18:02:31 +0800 | [diff] [blame] | 520 | if (lws_hdr_total_length(wsi, WSI_TOKEN_UPGRADE)) { |
Andy Green | b5b2319 | 2013-02-11 17:13:32 +0800 | [diff] [blame] | 521 | if (lws_hdr_total_length(wsi, WSI_TOKEN_VERSION)) |
Andy Green | 2b57a34 | 2013-02-06 15:15:25 +0900 | [diff] [blame] | 522 | wsi->ietf_spec_revision = |
Andy Green | 16ab318 | 2013-02-10 18:02:31 +0800 | [diff] [blame] | 523 | atoi(lws_hdr_simple_ptr(wsi, WSI_TOKEN_VERSION)); |
Andy Green | 177ca78 | 2013-02-04 09:09:19 +0800 | [diff] [blame] | 524 | |
Andy Green | b5b2319 | 2013-02-11 17:13:32 +0800 | [diff] [blame] | 525 | lwsl_parser("v%02d hdrs completed\n", wsi->ietf_spec_revision); |
Andy Green | 2b57a34 | 2013-02-06 15:15:25 +0900 | [diff] [blame] | 526 | } |
Andy Green | 177ca78 | 2013-02-04 09:09:19 +0800 | [diff] [blame] | 527 | wsi->u.hdr.parser_state = WSI_PARSING_COMPLETE; |
Andy Green | 224149a | 2013-02-11 21:43:41 +0800 | [diff] [blame] | 528 | wsi->hdr_parsing_completed = 1; |
Andy Green | 177ca78 | 2013-02-04 09:09:19 +0800 | [diff] [blame] | 529 | |
| 530 | return 0; |
Andy Green | 7c212cc | 2010-11-08 20:20:42 +0000 | [diff] [blame] | 531 | } |
| 532 | |
Andy Green | bfb051f | 2011-02-09 08:49:14 +0000 | [diff] [blame] | 533 | |
Andy Green | 2fd3f2f | 2013-01-18 09:49:20 +0800 | [diff] [blame] | 534 | /** |
| 535 | * lws_frame_is_binary: true if the current frame was sent in binary mode |
| 536 | * |
| 537 | * @wsi: the connection we are inquiring about |
| 538 | * |
| 539 | * This is intended to be called from the LWS_CALLBACK_RECEIVE callback if |
| 540 | * it's interested to see if the frame it's dealing with was sent in binary |
| 541 | * mode. |
| 542 | */ |
| 543 | |
Peter Pentchev | 9a4fef7 | 2013-03-30 09:52:21 +0800 | [diff] [blame] | 544 | LWS_VISIBLE int lws_frame_is_binary(struct libwebsocket *wsi) |
Andy Green | 2fd3f2f | 2013-01-18 09:49:20 +0800 | [diff] [blame] | 545 | { |
Andy Green | 623a98d | 2013-01-21 11:04:23 +0800 | [diff] [blame] | 546 | return wsi->u.ws.frame_is_binary; |
Andy Green | 2fd3f2f | 2013-01-18 09:49:20 +0800 | [diff] [blame] | 547 | } |
Andy Green | bfb051f | 2011-02-09 08:49:14 +0000 | [diff] [blame] | 548 | |
Andy Green | a41314f | 2011-05-23 10:00:03 +0100 | [diff] [blame] | 549 | int |
| 550 | libwebsocket_rx_sm(struct libwebsocket *wsi, unsigned char c) |
Andy Green | 7c212cc | 2010-11-08 20:20:42 +0000 | [diff] [blame] | 551 | { |
| 552 | int n; |
Andy Green | a41314f | 2011-05-23 10:00:03 +0100 | [diff] [blame] | 553 | struct lws_tokens eff_buf; |
Andy Green | aedc953 | 2013-02-10 21:21:24 +0800 | [diff] [blame] | 554 | int ret = 0; |
Andy Green | 3182ece | 2013-01-20 17:08:31 +0800 | [diff] [blame] | 555 | #ifndef LWS_NO_EXTENSIONS |
Andy Green | a41314f | 2011-05-23 10:00:03 +0100 | [diff] [blame] | 556 | int handled; |
| 557 | int m; |
Andy Green | 3182ece | 2013-01-20 17:08:31 +0800 | [diff] [blame] | 558 | #endif |
Andy Green | a41314f | 2011-05-23 10:00:03 +0100 | [diff] [blame] | 559 | |
Andy Green | 6ee372f | 2012-04-09 15:09:01 +0800 | [diff] [blame] | 560 | #if 0 |
Andy Green | 43db045 | 2013-01-10 19:50:35 +0800 | [diff] [blame] | 561 | lwsl_debug("RX: %02X ", c); |
Andy Green | 6ee372f | 2012-04-09 15:09:01 +0800 | [diff] [blame] | 562 | #endif |
Andy Green | 7c212cc | 2010-11-08 20:20:42 +0000 | [diff] [blame] | 563 | |
| 564 | switch (wsi->lws_rx_parse_state) { |
| 565 | case LWS_RXPS_NEW: |
Andy Green | e77ddd8 | 2010-11-13 10:03:47 +0000 | [diff] [blame] | 566 | |
Andy Green | 7c212cc | 2010-11-08 20:20:42 +0000 | [diff] [blame] | 567 | switch (wsi->ietf_spec_revision) { |
Andy Green | d85cb20 | 2011-09-25 09:32:54 +0100 | [diff] [blame] | 568 | case 13: |
Andy Green | 283d0a2 | 2011-04-24 05:46:23 +0100 | [diff] [blame] | 569 | /* |
| 570 | * no prepended frame key any more |
| 571 | */ |
Andy Green | 623a98d | 2013-01-21 11:04:23 +0800 | [diff] [blame] | 572 | wsi->u.ws.all_zero_nonce = 1; |
Andy Green | 283d0a2 | 2011-04-24 05:46:23 +0100 | [diff] [blame] | 573 | goto handle_first; |
| 574 | |
Andy Green | bfb051f | 2011-02-09 08:49:14 +0000 | [diff] [blame] | 575 | default: |
Andy Green | b5b2319 | 2013-02-11 17:13:32 +0800 | [diff] [blame] | 576 | lwsl_warn("lws_rx_sm: unknown spec version %d\n", |
| 577 | wsi->ietf_spec_revision); |
Andy Green | bfb051f | 2011-02-09 08:49:14 +0000 | [diff] [blame] | 578 | break; |
Andy Green | 7c212cc | 2010-11-08 20:20:42 +0000 | [diff] [blame] | 579 | } |
Andy Green | 6452f1e | 2010-11-11 09:22:22 +0000 | [diff] [blame] | 580 | break; |
Andy Green | 3e5eb78 | 2011-01-18 18:14:26 +0000 | [diff] [blame] | 581 | case LWS_RXPS_04_MASK_NONCE_1: |
Andy Green | 623a98d | 2013-01-21 11:04:23 +0800 | [diff] [blame] | 582 | wsi->u.ws.frame_masking_nonce_04[1] = c; |
Andy Green | 92970ba | 2011-02-10 09:22:35 +0000 | [diff] [blame] | 583 | if (c) |
Andy Green | 623a98d | 2013-01-21 11:04:23 +0800 | [diff] [blame] | 584 | wsi->u.ws.all_zero_nonce = 0; |
Andy Green | 3e5eb78 | 2011-01-18 18:14:26 +0000 | [diff] [blame] | 585 | wsi->lws_rx_parse_state = LWS_RXPS_04_MASK_NONCE_2; |
| 586 | break; |
| 587 | case LWS_RXPS_04_MASK_NONCE_2: |
Andy Green | 623a98d | 2013-01-21 11:04:23 +0800 | [diff] [blame] | 588 | wsi->u.ws.frame_masking_nonce_04[2] = c; |
Andy Green | 92970ba | 2011-02-10 09:22:35 +0000 | [diff] [blame] | 589 | if (c) |
Andy Green | 623a98d | 2013-01-21 11:04:23 +0800 | [diff] [blame] | 590 | wsi->u.ws.all_zero_nonce = 0; |
Andy Green | 3e5eb78 | 2011-01-18 18:14:26 +0000 | [diff] [blame] | 591 | wsi->lws_rx_parse_state = LWS_RXPS_04_MASK_NONCE_3; |
| 592 | break; |
| 593 | case LWS_RXPS_04_MASK_NONCE_3: |
Andy Green | 623a98d | 2013-01-21 11:04:23 +0800 | [diff] [blame] | 594 | wsi->u.ws.frame_masking_nonce_04[3] = c; |
Andy Green | 92970ba | 2011-02-10 09:22:35 +0000 | [diff] [blame] | 595 | if (c) |
Andy Green | 623a98d | 2013-01-21 11:04:23 +0800 | [diff] [blame] | 596 | wsi->u.ws.all_zero_nonce = 0; |
Andy Green | 3e5eb78 | 2011-01-18 18:14:26 +0000 | [diff] [blame] | 597 | |
Andy Green | 3e5eb78 | 2011-01-18 18:14:26 +0000 | [diff] [blame] | 598 | /* |
| 599 | * start from the zero'th byte in the XOR key buffer since |
| 600 | * this is the start of a frame with a new key |
| 601 | */ |
| 602 | |
Andy Green | 623a98d | 2013-01-21 11:04:23 +0800 | [diff] [blame] | 603 | wsi->u.ws.frame_mask_index = 0; |
Andy Green | 6964bb5 | 2011-01-23 16:50:33 +0000 | [diff] [blame] | 604 | |
Andy Green | 3e5eb78 | 2011-01-18 18:14:26 +0000 | [diff] [blame] | 605 | wsi->lws_rx_parse_state = LWS_RXPS_04_FRAME_HDR_1; |
| 606 | break; |
Andy Green | 38e57bb | 2011-01-19 12:20:27 +0000 | [diff] [blame] | 607 | |
| 608 | /* |
| 609 | * 04 logical framing from the spec (all this is masked when incoming |
| 610 | * and has to be unmasked) |
| 611 | * |
| 612 | * We ignore the possibility of extension data because we don't |
| 613 | * negotiate any extensions at the moment. |
Andy Green | 6964bb5 | 2011-01-23 16:50:33 +0000 | [diff] [blame] | 614 | * |
Andy Green | 38e57bb | 2011-01-19 12:20:27 +0000 | [diff] [blame] | 615 | * 0 1 2 3 |
| 616 | * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 |
| 617 | * +-+-+-+-+-------+-+-------------+-------------------------------+ |
| 618 | * |F|R|R|R| opcode|R| Payload len | Extended payload length | |
| 619 | * |I|S|S|S| (4) |S| (7) | (16/63) | |
| 620 | * |N|V|V|V| |V| | (if payload len==126/127) | |
| 621 | * | |1|2|3| |4| | | |
| 622 | * +-+-+-+-+-------+-+-------------+ - - - - - - - - - - - - - - - + |
| 623 | * | Extended payload length continued, if payload len == 127 | |
| 624 | * + - - - - - - - - - - - - - - - +-------------------------------+ |
| 625 | * | | Extension data | |
| 626 | * +-------------------------------+ - - - - - - - - - - - - - - - + |
| 627 | * : : |
| 628 | * +---------------------------------------------------------------+ |
| 629 | * : Application data : |
| 630 | * +---------------------------------------------------------------+ |
| 631 | * |
| 632 | * We pass payload through to userland as soon as we get it, ignoring |
| 633 | * FIN. It's up to userland to buffer it up if it wants to see a |
| 634 | * whole unfragmented block of the original size (which may be up to |
| 635 | * 2^63 long!) |
| 636 | */ |
| 637 | |
| 638 | case LWS_RXPS_04_FRAME_HDR_1: |
Andy Green | 283d0a2 | 2011-04-24 05:46:23 +0100 | [diff] [blame] | 639 | handle_first: |
| 640 | |
Andy Green | 623a98d | 2013-01-21 11:04:23 +0800 | [diff] [blame] | 641 | wsi->u.ws.opcode = c & 0xf; |
| 642 | wsi->u.ws.rsv = c & 0x70; |
| 643 | wsi->u.ws.final = !!((c >> 7) & 1); |
Andy Green | 1bc12f9 | 2013-02-28 17:11:29 +0800 | [diff] [blame] | 644 | |
Andy Green | 623a98d | 2013-01-21 11:04:23 +0800 | [diff] [blame] | 645 | switch (wsi->u.ws.opcode) { |
Andy Green | 10601c1 | 2013-01-19 10:39:35 +0800 | [diff] [blame] | 646 | case LWS_WS_OPCODE_07__TEXT_FRAME: |
Andy Green | 10601c1 | 2013-01-19 10:39:35 +0800 | [diff] [blame] | 647 | case LWS_WS_OPCODE_07__BINARY_FRAME: |
Andy Green | b5b2319 | 2013-02-11 17:13:32 +0800 | [diff] [blame] | 648 | wsi->u.ws.frame_is_binary = |
| 649 | wsi->u.ws.opcode == LWS_WS_OPCODE_07__BINARY_FRAME; |
Andy Green | 10601c1 | 2013-01-19 10:39:35 +0800 | [diff] [blame] | 650 | break; |
| 651 | } |
Andy Green | 38e57bb | 2011-01-19 12:20:27 +0000 | [diff] [blame] | 652 | wsi->lws_rx_parse_state = LWS_RXPS_04_FRAME_HDR_LEN; |
| 653 | break; |
| 654 | |
| 655 | case LWS_RXPS_04_FRAME_HDR_LEN: |
Andy Green | 38e57bb | 2011-01-19 12:20:27 +0000 | [diff] [blame] | 656 | |
Andy Green | 623a98d | 2013-01-21 11:04:23 +0800 | [diff] [blame] | 657 | wsi->u.ws.this_frame_masked = !!(c & 0x80); |
Andy Green | 283d0a2 | 2011-04-24 05:46:23 +0100 | [diff] [blame] | 658 | |
Andy Green | 5bf6578 | 2011-09-25 10:46:31 +0100 | [diff] [blame] | 659 | switch (c & 0x7f) { |
Andy Green | 38e57bb | 2011-01-19 12:20:27 +0000 | [diff] [blame] | 660 | case 126: |
| 661 | /* control frames are not allowed to have big lengths */ |
Andy Green | 623a98d | 2013-01-21 11:04:23 +0800 | [diff] [blame] | 662 | if (wsi->u.ws.opcode & 8) |
Andy Green | 23545db | 2011-04-24 06:19:22 +0100 | [diff] [blame] | 663 | goto illegal_ctl_length; |
| 664 | |
Andy Green | 38e57bb | 2011-01-19 12:20:27 +0000 | [diff] [blame] | 665 | wsi->lws_rx_parse_state = LWS_RXPS_04_FRAME_HDR_LEN16_2; |
| 666 | break; |
| 667 | case 127: |
| 668 | /* control frames are not allowed to have big lengths */ |
Andy Green | 623a98d | 2013-01-21 11:04:23 +0800 | [diff] [blame] | 669 | if (wsi->u.ws.opcode & 8) |
Andy Green | 23545db | 2011-04-24 06:19:22 +0100 | [diff] [blame] | 670 | goto illegal_ctl_length; |
| 671 | |
Andy Green | 38e57bb | 2011-01-19 12:20:27 +0000 | [diff] [blame] | 672 | wsi->lws_rx_parse_state = LWS_RXPS_04_FRAME_HDR_LEN64_8; |
| 673 | break; |
| 674 | default: |
Andy Green | 623a98d | 2013-01-21 11:04:23 +0800 | [diff] [blame] | 675 | wsi->u.ws.rx_packet_length = c & 0x7f; |
| 676 | if (wsi->u.ws.this_frame_masked) |
Andy Green | 283d0a2 | 2011-04-24 05:46:23 +0100 | [diff] [blame] | 677 | wsi->lws_rx_parse_state = |
| 678 | LWS_RXPS_07_COLLECT_FRAME_KEY_1; |
| 679 | else |
Andy Green | 8ea1955 | 2014-02-15 16:00:37 +0800 | [diff] [blame] | 680 | if (wsi->u.ws.rx_packet_length) |
| 681 | wsi->lws_rx_parse_state = |
Andy Green | 38e57bb | 2011-01-19 12:20:27 +0000 | [diff] [blame] | 682 | LWS_RXPS_PAYLOAD_UNTIL_LENGTH_EXHAUSTED; |
Andy Green | 8ea1955 | 2014-02-15 16:00:37 +0800 | [diff] [blame] | 683 | else { |
| 684 | wsi->lws_rx_parse_state = LWS_RXPS_NEW; |
| 685 | goto spill; |
| 686 | } |
Andy Green | 38e57bb | 2011-01-19 12:20:27 +0000 | [diff] [blame] | 687 | break; |
| 688 | } |
| 689 | break; |
| 690 | |
| 691 | case LWS_RXPS_04_FRAME_HDR_LEN16_2: |
Andy Green | 623a98d | 2013-01-21 11:04:23 +0800 | [diff] [blame] | 692 | wsi->u.ws.rx_packet_length = c << 8; |
Andy Green | 38e57bb | 2011-01-19 12:20:27 +0000 | [diff] [blame] | 693 | wsi->lws_rx_parse_state = LWS_RXPS_04_FRAME_HDR_LEN16_1; |
| 694 | break; |
| 695 | |
| 696 | case LWS_RXPS_04_FRAME_HDR_LEN16_1: |
Andy Green | 623a98d | 2013-01-21 11:04:23 +0800 | [diff] [blame] | 697 | wsi->u.ws.rx_packet_length |= c; |
| 698 | if (wsi->u.ws.this_frame_masked) |
Andy Green | 283d0a2 | 2011-04-24 05:46:23 +0100 | [diff] [blame] | 699 | wsi->lws_rx_parse_state = |
| 700 | LWS_RXPS_07_COLLECT_FRAME_KEY_1; |
| 701 | else |
| 702 | wsi->lws_rx_parse_state = |
| 703 | LWS_RXPS_PAYLOAD_UNTIL_LENGTH_EXHAUSTED; |
Andy Green | 38e57bb | 2011-01-19 12:20:27 +0000 | [diff] [blame] | 704 | break; |
| 705 | |
| 706 | case LWS_RXPS_04_FRAME_HDR_LEN64_8: |
Andy Green | 38e57bb | 2011-01-19 12:20:27 +0000 | [diff] [blame] | 707 | if (c & 0x80) { |
Andy Green | 43db045 | 2013-01-10 19:50:35 +0800 | [diff] [blame] | 708 | lwsl_warn("b63 of length must be zero\n"); |
Andy Green | 38e57bb | 2011-01-19 12:20:27 +0000 | [diff] [blame] | 709 | /* kill the connection */ |
| 710 | return -1; |
| 711 | } |
Andy Green | f55830d | 2011-01-27 06:45:53 +0000 | [diff] [blame] | 712 | #if defined __LP64__ |
Andy Green | 623a98d | 2013-01-21 11:04:23 +0800 | [diff] [blame] | 713 | wsi->u.ws.rx_packet_length = ((size_t)c) << 56; |
Andy Green | f55830d | 2011-01-27 06:45:53 +0000 | [diff] [blame] | 714 | #else |
Andy Green | 623a98d | 2013-01-21 11:04:23 +0800 | [diff] [blame] | 715 | wsi->u.ws.rx_packet_length = 0; |
Andy Green | f55830d | 2011-01-27 06:45:53 +0000 | [diff] [blame] | 716 | #endif |
Andy Green | 38e57bb | 2011-01-19 12:20:27 +0000 | [diff] [blame] | 717 | wsi->lws_rx_parse_state = LWS_RXPS_04_FRAME_HDR_LEN64_7; |
| 718 | break; |
| 719 | |
| 720 | case LWS_RXPS_04_FRAME_HDR_LEN64_7: |
Andy Green | f55830d | 2011-01-27 06:45:53 +0000 | [diff] [blame] | 721 | #if defined __LP64__ |
Andy Green | 623a98d | 2013-01-21 11:04:23 +0800 | [diff] [blame] | 722 | wsi->u.ws.rx_packet_length |= ((size_t)c) << 48; |
Andy Green | f55830d | 2011-01-27 06:45:53 +0000 | [diff] [blame] | 723 | #endif |
Andy Green | 38e57bb | 2011-01-19 12:20:27 +0000 | [diff] [blame] | 724 | wsi->lws_rx_parse_state = LWS_RXPS_04_FRAME_HDR_LEN64_6; |
| 725 | break; |
| 726 | |
| 727 | case LWS_RXPS_04_FRAME_HDR_LEN64_6: |
Andy Green | f55830d | 2011-01-27 06:45:53 +0000 | [diff] [blame] | 728 | #if defined __LP64__ |
Andy Green | 623a98d | 2013-01-21 11:04:23 +0800 | [diff] [blame] | 729 | wsi->u.ws.rx_packet_length |= ((size_t)c) << 40; |
Andy Green | f55830d | 2011-01-27 06:45:53 +0000 | [diff] [blame] | 730 | #endif |
Andy Green | 38e57bb | 2011-01-19 12:20:27 +0000 | [diff] [blame] | 731 | wsi->lws_rx_parse_state = LWS_RXPS_04_FRAME_HDR_LEN64_5; |
| 732 | break; |
| 733 | |
| 734 | case LWS_RXPS_04_FRAME_HDR_LEN64_5: |
Andy Green | f55830d | 2011-01-27 06:45:53 +0000 | [diff] [blame] | 735 | #if defined __LP64__ |
Andy Green | 623a98d | 2013-01-21 11:04:23 +0800 | [diff] [blame] | 736 | wsi->u.ws.rx_packet_length |= ((size_t)c) << 32; |
Andy Green | f55830d | 2011-01-27 06:45:53 +0000 | [diff] [blame] | 737 | #endif |
Andy Green | 38e57bb | 2011-01-19 12:20:27 +0000 | [diff] [blame] | 738 | wsi->lws_rx_parse_state = LWS_RXPS_04_FRAME_HDR_LEN64_4; |
| 739 | break; |
| 740 | |
| 741 | case LWS_RXPS_04_FRAME_HDR_LEN64_4: |
Andy Green | 623a98d | 2013-01-21 11:04:23 +0800 | [diff] [blame] | 742 | wsi->u.ws.rx_packet_length |= ((size_t)c) << 24; |
Andy Green | 38e57bb | 2011-01-19 12:20:27 +0000 | [diff] [blame] | 743 | wsi->lws_rx_parse_state = LWS_RXPS_04_FRAME_HDR_LEN64_3; |
| 744 | break; |
| 745 | |
| 746 | case LWS_RXPS_04_FRAME_HDR_LEN64_3: |
Andy Green | 623a98d | 2013-01-21 11:04:23 +0800 | [diff] [blame] | 747 | wsi->u.ws.rx_packet_length |= ((size_t)c) << 16; |
Andy Green | 38e57bb | 2011-01-19 12:20:27 +0000 | [diff] [blame] | 748 | wsi->lws_rx_parse_state = LWS_RXPS_04_FRAME_HDR_LEN64_2; |
| 749 | break; |
| 750 | |
| 751 | case LWS_RXPS_04_FRAME_HDR_LEN64_2: |
Andy Green | 623a98d | 2013-01-21 11:04:23 +0800 | [diff] [blame] | 752 | wsi->u.ws.rx_packet_length |= ((size_t)c) << 8; |
Andy Green | 38e57bb | 2011-01-19 12:20:27 +0000 | [diff] [blame] | 753 | wsi->lws_rx_parse_state = LWS_RXPS_04_FRAME_HDR_LEN64_1; |
| 754 | break; |
| 755 | |
| 756 | case LWS_RXPS_04_FRAME_HDR_LEN64_1: |
Andy Green | 623a98d | 2013-01-21 11:04:23 +0800 | [diff] [blame] | 757 | wsi->u.ws.rx_packet_length |= ((size_t)c); |
| 758 | if (wsi->u.ws.this_frame_masked) |
Andy Green | 283d0a2 | 2011-04-24 05:46:23 +0100 | [diff] [blame] | 759 | wsi->lws_rx_parse_state = |
| 760 | LWS_RXPS_07_COLLECT_FRAME_KEY_1; |
| 761 | else |
| 762 | wsi->lws_rx_parse_state = |
| 763 | LWS_RXPS_PAYLOAD_UNTIL_LENGTH_EXHAUSTED; |
Andy Green | 38e57bb | 2011-01-19 12:20:27 +0000 | [diff] [blame] | 764 | break; |
| 765 | |
Andy Green | 283d0a2 | 2011-04-24 05:46:23 +0100 | [diff] [blame] | 766 | case LWS_RXPS_07_COLLECT_FRAME_KEY_1: |
Andy Green | 623a98d | 2013-01-21 11:04:23 +0800 | [diff] [blame] | 767 | wsi->u.ws.frame_masking_nonce_04[0] = c; |
Andy Green | 283d0a2 | 2011-04-24 05:46:23 +0100 | [diff] [blame] | 768 | if (c) |
Andy Green | 623a98d | 2013-01-21 11:04:23 +0800 | [diff] [blame] | 769 | wsi->u.ws.all_zero_nonce = 0; |
Andy Green | 283d0a2 | 2011-04-24 05:46:23 +0100 | [diff] [blame] | 770 | wsi->lws_rx_parse_state = LWS_RXPS_07_COLLECT_FRAME_KEY_2; |
| 771 | break; |
| 772 | |
| 773 | case LWS_RXPS_07_COLLECT_FRAME_KEY_2: |
Andy Green | 623a98d | 2013-01-21 11:04:23 +0800 | [diff] [blame] | 774 | wsi->u.ws.frame_masking_nonce_04[1] = c; |
Andy Green | 283d0a2 | 2011-04-24 05:46:23 +0100 | [diff] [blame] | 775 | if (c) |
Andy Green | 623a98d | 2013-01-21 11:04:23 +0800 | [diff] [blame] | 776 | wsi->u.ws.all_zero_nonce = 0; |
Andy Green | 283d0a2 | 2011-04-24 05:46:23 +0100 | [diff] [blame] | 777 | wsi->lws_rx_parse_state = LWS_RXPS_07_COLLECT_FRAME_KEY_3; |
| 778 | break; |
| 779 | |
| 780 | case LWS_RXPS_07_COLLECT_FRAME_KEY_3: |
Andy Green | 623a98d | 2013-01-21 11:04:23 +0800 | [diff] [blame] | 781 | wsi->u.ws.frame_masking_nonce_04[2] = c; |
Andy Green | 283d0a2 | 2011-04-24 05:46:23 +0100 | [diff] [blame] | 782 | if (c) |
Andy Green | 623a98d | 2013-01-21 11:04:23 +0800 | [diff] [blame] | 783 | wsi->u.ws.all_zero_nonce = 0; |
Andy Green | 283d0a2 | 2011-04-24 05:46:23 +0100 | [diff] [blame] | 784 | wsi->lws_rx_parse_state = LWS_RXPS_07_COLLECT_FRAME_KEY_4; |
| 785 | break; |
| 786 | |
| 787 | case LWS_RXPS_07_COLLECT_FRAME_KEY_4: |
Andy Green | 623a98d | 2013-01-21 11:04:23 +0800 | [diff] [blame] | 788 | wsi->u.ws.frame_masking_nonce_04[3] = c; |
Andy Green | 283d0a2 | 2011-04-24 05:46:23 +0100 | [diff] [blame] | 789 | if (c) |
Andy Green | 623a98d | 2013-01-21 11:04:23 +0800 | [diff] [blame] | 790 | wsi->u.ws.all_zero_nonce = 0; |
Andy Green | 283d0a2 | 2011-04-24 05:46:23 +0100 | [diff] [blame] | 791 | wsi->lws_rx_parse_state = |
| 792 | LWS_RXPS_PAYLOAD_UNTIL_LENGTH_EXHAUSTED; |
Andy Green | 623a98d | 2013-01-21 11:04:23 +0800 | [diff] [blame] | 793 | wsi->u.ws.frame_mask_index = 0; |
Andy Green | 8ea1955 | 2014-02-15 16:00:37 +0800 | [diff] [blame] | 794 | if (wsi->u.ws.rx_packet_length == 0) { |
| 795 | wsi->lws_rx_parse_state = LWS_RXPS_NEW; |
Andy Green | 1bc12f9 | 2013-02-28 17:11:29 +0800 | [diff] [blame] | 796 | goto spill; |
Andy Green | 8ea1955 | 2014-02-15 16:00:37 +0800 | [diff] [blame] | 797 | } |
Andy Green | 283d0a2 | 2011-04-24 05:46:23 +0100 | [diff] [blame] | 798 | break; |
| 799 | |
| 800 | |
Andy Green | 7c212cc | 2010-11-08 20:20:42 +0000 | [diff] [blame] | 801 | case LWS_RXPS_PAYLOAD_UNTIL_LENGTH_EXHAUSTED: |
Andy Green | 3182ece | 2013-01-20 17:08:31 +0800 | [diff] [blame] | 802 | |
Andy Green | 5449511 | 2013-02-06 21:10:16 +0900 | [diff] [blame] | 803 | if (!wsi->u.ws.rx_user_buffer) |
| 804 | lwsl_err("NULL user buffer...\n"); |
| 805 | |
Andy Green | 623a98d | 2013-01-21 11:04:23 +0800 | [diff] [blame] | 806 | if (wsi->u.ws.all_zero_nonce) |
| 807 | wsi->u.ws.rx_user_buffer[LWS_SEND_BUFFER_PRE_PADDING + |
| 808 | (wsi->u.ws.rx_user_buffer_head++)] = c; |
Andy Green | 92970ba | 2011-02-10 09:22:35 +0000 | [diff] [blame] | 809 | else |
Andy Green | 623a98d | 2013-01-21 11:04:23 +0800 | [diff] [blame] | 810 | wsi->u.ws.rx_user_buffer[LWS_SEND_BUFFER_PRE_PADDING + |
| 811 | (wsi->u.ws.rx_user_buffer_head++)] = |
Andy Green | b5b2319 | 2013-02-11 17:13:32 +0800 | [diff] [blame] | 812 | c ^ wsi->u.ws.frame_masking_nonce_04[ |
| 813 | (wsi->u.ws.frame_mask_index++) & 3]; |
Andy Green | 4739e5c | 2011-01-22 12:51:57 +0000 | [diff] [blame] | 814 | |
Andy Green | 623a98d | 2013-01-21 11:04:23 +0800 | [diff] [blame] | 815 | if (--wsi->u.ws.rx_packet_length == 0) { |
Andy Green | c2bb3dc | 2013-02-14 11:25:44 +0800 | [diff] [blame] | 816 | /* spill because we have the whole frame */ |
Andy Green | 4739e5c | 2011-01-22 12:51:57 +0000 | [diff] [blame] | 817 | wsi->lws_rx_parse_state = LWS_RXPS_NEW; |
| 818 | goto spill; |
| 819 | } |
Andy Green | c2bb3dc | 2013-02-14 11:25:44 +0800 | [diff] [blame] | 820 | |
| 821 | /* |
| 822 | * if there's no protocol max frame size given, we are |
| 823 | * supposed to default to LWS_MAX_SOCKET_IO_BUF |
| 824 | */ |
| 825 | |
| 826 | if (!wsi->protocol->rx_buffer_size && |
| 827 | wsi->u.ws.rx_user_buffer_head != |
| 828 | LWS_MAX_SOCKET_IO_BUF) |
Andy Green | 4739e5c | 2011-01-22 12:51:57 +0000 | [diff] [blame] | 829 | break; |
Andy Green | c2bb3dc | 2013-02-14 11:25:44 +0800 | [diff] [blame] | 830 | else |
| 831 | if (wsi->protocol->rx_buffer_size && |
| 832 | wsi->u.ws.rx_user_buffer_head != |
| 833 | wsi->protocol->rx_buffer_size) |
| 834 | break; |
| 835 | |
| 836 | /* spill because we filled our rx buffer */ |
Andy Green | 4739e5c | 2011-01-22 12:51:57 +0000 | [diff] [blame] | 837 | spill: |
| 838 | /* |
| 839 | * is this frame a control packet we should take care of at this |
| 840 | * layer? If so service it and hide it from the user callback |
| 841 | */ |
| 842 | |
Andy Green | 43db045 | 2013-01-10 19:50:35 +0800 | [diff] [blame] | 843 | lwsl_parser("spill on %s\n", wsi->protocol->name); |
Andy Green | a41314f | 2011-05-23 10:00:03 +0100 | [diff] [blame] | 844 | |
Andy Green | 623a98d | 2013-01-21 11:04:23 +0800 | [diff] [blame] | 845 | switch (wsi->u.ws.opcode) { |
Andy Green | 23545db | 2011-04-24 06:19:22 +0100 | [diff] [blame] | 846 | case LWS_WS_OPCODE_07__CLOSE: |
Andy Green | da527df | 2011-03-07 07:08:12 +0000 | [diff] [blame] | 847 | /* is this an acknowledgement of our close? */ |
| 848 | if (wsi->state == WSI_STATE_AWAITING_CLOSE_ACK) { |
| 849 | /* |
| 850 | * fine he has told us he is closing too, let's |
| 851 | * finish our close |
| 852 | */ |
Andy Green | 43db045 | 2013-01-10 19:50:35 +0800 | [diff] [blame] | 853 | lwsl_parser("seen client close ack\n"); |
Andy Green | da527df | 2011-03-07 07:08:12 +0000 | [diff] [blame] | 854 | return -1; |
| 855 | } |
Andy Green | 43db045 | 2013-01-10 19:50:35 +0800 | [diff] [blame] | 856 | lwsl_parser("server sees client close packet\n"); |
Andy Green | 4739e5c | 2011-01-22 12:51:57 +0000 | [diff] [blame] | 857 | /* parrot the close packet payload back */ |
| 858 | n = libwebsocket_write(wsi, (unsigned char *) |
Andy Green | b5b2319 | 2013-02-11 17:13:32 +0800 | [diff] [blame] | 859 | &wsi->u.ws.rx_user_buffer[ |
| 860 | LWS_SEND_BUFFER_PRE_PADDING], |
| 861 | wsi->u.ws.rx_user_buffer_head, |
| 862 | LWS_WRITE_CLOSE); |
Andy Green | fc7c5e4 | 2013-02-23 10:50:10 +0800 | [diff] [blame] | 863 | if (n < 0) |
Andy Green | 0303db4 | 2013-01-17 14:46:43 +0800 | [diff] [blame] | 864 | lwsl_info("write of close ack failed %d\n", n); |
Andy Green | 5e1fa17 | 2011-02-10 09:07:05 +0000 | [diff] [blame] | 865 | wsi->state = WSI_STATE_RETURNED_CLOSE_ALREADY; |
Andy Green | 4739e5c | 2011-01-22 12:51:57 +0000 | [diff] [blame] | 866 | /* close the connection */ |
| 867 | return -1; |
| 868 | |
Andy Green | 23545db | 2011-04-24 06:19:22 +0100 | [diff] [blame] | 869 | case LWS_WS_OPCODE_07__PING: |
Andy Green | b5b2319 | 2013-02-11 17:13:32 +0800 | [diff] [blame] | 870 | lwsl_info("received %d byte ping, sending pong\n", |
| 871 | wsi->u.ws.rx_user_buffer_head); |
| 872 | lwsl_hexdump(&wsi->u.ws.rx_user_buffer[ |
| 873 | LWS_SEND_BUFFER_PRE_PADDING], |
| 874 | wsi->u.ws.rx_user_buffer_head); |
Andy Green | 5e1fa17 | 2011-02-10 09:07:05 +0000 | [diff] [blame] | 875 | /* parrot the ping packet payload back as a pong */ |
Andy Green | 4739e5c | 2011-01-22 12:51:57 +0000 | [diff] [blame] | 876 | n = libwebsocket_write(wsi, (unsigned char *) |
Andy Green | b5b2319 | 2013-02-11 17:13:32 +0800 | [diff] [blame] | 877 | &wsi->u.ws.rx_user_buffer[LWS_SEND_BUFFER_PRE_PADDING], |
| 878 | wsi->u.ws.rx_user_buffer_head, LWS_WRITE_PONG); |
Andy Green | fc7c5e4 | 2013-02-23 10:50:10 +0800 | [diff] [blame] | 879 | if (n < 0) |
| 880 | return -1; |
Andy Green | a6cbece | 2011-01-27 20:06:03 +0000 | [diff] [blame] | 881 | /* ... then just drop it */ |
Andy Green | 623a98d | 2013-01-21 11:04:23 +0800 | [diff] [blame] | 882 | wsi->u.ws.rx_user_buffer_head = 0; |
Andy Green | a6cbece | 2011-01-27 20:06:03 +0000 | [diff] [blame] | 883 | return 0; |
Andy Green | 4739e5c | 2011-01-22 12:51:57 +0000 | [diff] [blame] | 884 | |
Andy Green | 23545db | 2011-04-24 06:19:22 +0100 | [diff] [blame] | 885 | case LWS_WS_OPCODE_07__PONG: |
Andy Green | 4739e5c | 2011-01-22 12:51:57 +0000 | [diff] [blame] | 886 | /* ... then just drop it */ |
Andy Green | 623a98d | 2013-01-21 11:04:23 +0800 | [diff] [blame] | 887 | wsi->u.ws.rx_user_buffer_head = 0; |
Andy Green | 4739e5c | 2011-01-22 12:51:57 +0000 | [diff] [blame] | 888 | return 0; |
| 889 | |
Andy Green | a41314f | 2011-05-23 10:00:03 +0100 | [diff] [blame] | 890 | case LWS_WS_OPCODE_07__TEXT_FRAME: |
| 891 | case LWS_WS_OPCODE_07__BINARY_FRAME: |
Andy Green | 2fd3f2f | 2013-01-18 09:49:20 +0800 | [diff] [blame] | 892 | case LWS_WS_OPCODE_07__CONTINUATION: |
Andy Green | 4739e5c | 2011-01-22 12:51:57 +0000 | [diff] [blame] | 893 | break; |
Andy Green | a41314f | 2011-05-23 10:00:03 +0100 | [diff] [blame] | 894 | |
| 895 | default: |
Andy Green | 3182ece | 2013-01-20 17:08:31 +0800 | [diff] [blame] | 896 | #ifndef LWS_NO_EXTENSIONS |
Andy Green | b5b2319 | 2013-02-11 17:13:32 +0800 | [diff] [blame] | 897 | lwsl_parser("passing opc %x up to exts\n", |
| 898 | wsi->u.ws.opcode); |
Andy Green | a41314f | 2011-05-23 10:00:03 +0100 | [diff] [blame] | 899 | |
| 900 | /* |
| 901 | * It's something special we can't understand here. |
| 902 | * Pass the payload up to the extension's parsing |
| 903 | * state machine. |
| 904 | */ |
| 905 | |
Andy Green | 623a98d | 2013-01-21 11:04:23 +0800 | [diff] [blame] | 906 | eff_buf.token = &wsi->u.ws.rx_user_buffer[ |
Andy Green | a41314f | 2011-05-23 10:00:03 +0100 | [diff] [blame] | 907 | LWS_SEND_BUFFER_PRE_PADDING]; |
Andy Green | 623a98d | 2013-01-21 11:04:23 +0800 | [diff] [blame] | 908 | eff_buf.token_len = wsi->u.ws.rx_user_buffer_head; |
Andy Green | a41314f | 2011-05-23 10:00:03 +0100 | [diff] [blame] | 909 | |
| 910 | handled = 0; |
| 911 | for (n = 0; n < wsi->count_active_extensions; n++) { |
| 912 | m = wsi->active_extensions[n]->callback( |
| 913 | wsi->protocol->owning_server, |
| 914 | wsi->active_extensions[n], wsi, |
| 915 | LWS_EXT_CALLBACK_EXTENDED_PAYLOAD_RX, |
| 916 | wsi->active_extensions_user[n], |
| 917 | &eff_buf, 0); |
| 918 | if (m) |
| 919 | handled = 1; |
| 920 | } |
| 921 | |
Andy Green | 25a56b0 | 2011-09-25 08:47:57 +0100 | [diff] [blame] | 922 | if (!handled) |
Andy Green | 3182ece | 2013-01-20 17:08:31 +0800 | [diff] [blame] | 923 | #endif |
Andy Green | b5b2319 | 2013-02-11 17:13:32 +0800 | [diff] [blame] | 924 | lwsl_ext("ext opc opcode 0x%x unknown\n", |
| 925 | wsi->u.ws.opcode); |
Andy Green | a41314f | 2011-05-23 10:00:03 +0100 | [diff] [blame] | 926 | |
Andy Green | 623a98d | 2013-01-21 11:04:23 +0800 | [diff] [blame] | 927 | wsi->u.ws.rx_user_buffer_head = 0; |
Andy Green | a41314f | 2011-05-23 10:00:03 +0100 | [diff] [blame] | 928 | return 0; |
Andy Green | 4739e5c | 2011-01-22 12:51:57 +0000 | [diff] [blame] | 929 | } |
| 930 | |
| 931 | /* |
| 932 | * No it's real payload, pass it up to the user callback. |
| 933 | * It's nicely buffered with the pre-padding taken care of |
| 934 | * so it can be sent straight out again using libwebsocket_write |
| 935 | */ |
| 936 | |
Andy Green | 623a98d | 2013-01-21 11:04:23 +0800 | [diff] [blame] | 937 | eff_buf.token = &wsi->u.ws.rx_user_buffer[ |
David Galeano | e2cf992 | 2013-01-09 18:06:55 +0800 | [diff] [blame] | 938 | LWS_SEND_BUFFER_PRE_PADDING]; |
Andy Green | 623a98d | 2013-01-21 11:04:23 +0800 | [diff] [blame] | 939 | eff_buf.token_len = wsi->u.ws.rx_user_buffer_head; |
Andy Green | 3182ece | 2013-01-20 17:08:31 +0800 | [diff] [blame] | 940 | #ifndef LWS_NO_EXTENSIONS |
David Galeano | e2cf992 | 2013-01-09 18:06:55 +0800 | [diff] [blame] | 941 | for (n = 0; n < wsi->count_active_extensions; n++) { |
| 942 | m = wsi->active_extensions[n]->callback( |
| 943 | wsi->protocol->owning_server, |
| 944 | wsi->active_extensions[n], wsi, |
| 945 | LWS_EXT_CALLBACK_PAYLOAD_RX, |
| 946 | wsi->active_extensions_user[n], |
| 947 | &eff_buf, 0); |
| 948 | if (m < 0) { |
Andy Green | 43db045 | 2013-01-10 19:50:35 +0800 | [diff] [blame] | 949 | lwsl_ext( |
Andy Green | b5b2319 | 2013-02-11 17:13:32 +0800 | [diff] [blame] | 950 | "Extension '%s' failed to handle payload!\n", |
| 951 | wsi->active_extensions[n]->name); |
David Galeano | e2cf992 | 2013-01-09 18:06:55 +0800 | [diff] [blame] | 952 | return -1; |
| 953 | } |
| 954 | } |
Andy Green | 3182ece | 2013-01-20 17:08:31 +0800 | [diff] [blame] | 955 | #endif |
David Galeano | e2cf992 | 2013-01-09 18:06:55 +0800 | [diff] [blame] | 956 | if (eff_buf.token_len > 0) { |
Andy Green | aedc953 | 2013-02-10 21:21:24 +0800 | [diff] [blame] | 957 | eff_buf.token[eff_buf.token_len] = '\0'; |
David Galeano | e2cf992 | 2013-01-09 18:06:55 +0800 | [diff] [blame] | 958 | |
Andy Green | aedc953 | 2013-02-10 21:21:24 +0800 | [diff] [blame] | 959 | if (wsi->protocol->callback) |
Andy Green | b5b2319 | 2013-02-11 17:13:32 +0800 | [diff] [blame] | 960 | ret = user_callback_handle_rxflow( |
| 961 | wsi->protocol->callback, |
| 962 | wsi->protocol->owning_server, |
| 963 | wsi, LWS_CALLBACK_RECEIVE, |
| 964 | wsi->user_space, |
| 965 | eff_buf.token, |
| 966 | eff_buf.token_len); |
David Galeano | e2cf992 | 2013-01-09 18:06:55 +0800 | [diff] [blame] | 967 | else |
Andy Green | f7609e9 | 2013-01-14 13:10:55 +0800 | [diff] [blame] | 968 | lwsl_err("No callback on payload spill!\n"); |
David Galeano | e2cf992 | 2013-01-09 18:06:55 +0800 | [diff] [blame] | 969 | } |
Andy Green | a41314f | 2011-05-23 10:00:03 +0100 | [diff] [blame] | 970 | |
Andy Green | 623a98d | 2013-01-21 11:04:23 +0800 | [diff] [blame] | 971 | wsi->u.ws.rx_user_buffer_head = 0; |
Andy Green | 4739e5c | 2011-01-22 12:51:57 +0000 | [diff] [blame] | 972 | break; |
| 973 | } |
| 974 | |
Andy Green | aedc953 | 2013-02-10 21:21:24 +0800 | [diff] [blame] | 975 | return ret; |
Andy Green | 23545db | 2011-04-24 06:19:22 +0100 | [diff] [blame] | 976 | |
| 977 | illegal_ctl_length: |
| 978 | |
Andy Green | b5b2319 | 2013-02-11 17:13:32 +0800 | [diff] [blame] | 979 | lwsl_warn("Control frame with xtended length is illegal\n"); |
Andy Green | 23545db | 2011-04-24 06:19:22 +0100 | [diff] [blame] | 980 | /* kill the connection */ |
| 981 | return -1; |
Andy Green | 4739e5c | 2011-01-22 12:51:57 +0000 | [diff] [blame] | 982 | } |
| 983 | |
| 984 | |
Andy Green | 7c212cc | 2010-11-08 20:20:42 +0000 | [diff] [blame] | 985 | int libwebsocket_interpret_incoming_packet(struct libwebsocket *wsi, |
| 986 | unsigned char *buf, size_t len) |
| 987 | { |
Andy Green | ca0a129 | 2013-03-16 11:24:23 +0800 | [diff] [blame] | 988 | size_t n = 0; |
Andy Green | 706961d | 2013-01-17 16:50:35 +0800 | [diff] [blame] | 989 | int m; |
Andy Green | 7c212cc | 2010-11-08 20:20:42 +0000 | [diff] [blame] | 990 | |
Andy Green | 3182ece | 2013-01-20 17:08:31 +0800 | [diff] [blame] | 991 | #if 0 |
Andy Green | 43db045 | 2013-01-10 19:50:35 +0800 | [diff] [blame] | 992 | lwsl_parser("received %d byte packet\n", (int)len); |
Andy Green | 0303db4 | 2013-01-17 14:46:43 +0800 | [diff] [blame] | 993 | lwsl_hexdump(buf, len); |
Andy Green | ab7d933 | 2010-11-11 13:19:19 +0000 | [diff] [blame] | 994 | #endif |
Andy Green | 38e57bb | 2011-01-19 12:20:27 +0000 | [diff] [blame] | 995 | |
Andy Green | 7c212cc | 2010-11-08 20:20:42 +0000 | [diff] [blame] | 996 | /* let the rx protocol state machine have as much as it needs */ |
Andy Green | e77ddd8 | 2010-11-13 10:03:47 +0000 | [diff] [blame] | 997 | |
Andy Green | 706961d | 2013-01-17 16:50:35 +0800 | [diff] [blame] | 998 | while (n < len) { |
Andy Green | ca0a129 | 2013-03-16 11:24:23 +0800 | [diff] [blame] | 999 | /* |
| 1000 | * we were accepting input but now we stopped doing so |
| 1001 | */ |
| 1002 | if (!(wsi->u.ws.rxflow_change_to & LWS_RXFLOW_ALLOW)) { |
| 1003 | /* his RX is flowcontrolled, don't send remaining now */ |
Andy Green | b5b2319 | 2013-02-11 17:13:32 +0800 | [diff] [blame] | 1004 | if (!wsi->u.ws.rxflow_buffer) { |
| 1005 | /* a new rxflow, buffer it and warn caller */ |
| 1006 | lwsl_info("new rxflow input buffer len %d\n", |
| 1007 | len - n); |
| 1008 | wsi->u.ws.rxflow_buffer = |
| 1009 | (unsigned char *)malloc(len - n); |
Andy Green | 623a98d | 2013-01-21 11:04:23 +0800 | [diff] [blame] | 1010 | wsi->u.ws.rxflow_len = len - n; |
| 1011 | wsi->u.ws.rxflow_pos = 0; |
Andy Green | b5b2319 | 2013-02-11 17:13:32 +0800 | [diff] [blame] | 1012 | memcpy(wsi->u.ws.rxflow_buffer, |
| 1013 | buf + n, len - n); |
Andy Green | ca0a129 | 2013-03-16 11:24:23 +0800 | [diff] [blame] | 1014 | } else |
Andy Green | b5b2319 | 2013-02-11 17:13:32 +0800 | [diff] [blame] | 1015 | /* rxflow while we were spilling prev rxflow */ |
Andy Green | 98ba9e0 | 2013-03-23 09:44:47 +0800 | [diff] [blame] | 1016 | lwsl_info("stalling in existing rxflow buf\n"); |
Andy Green | ca0a129 | 2013-03-16 11:24:23 +0800 | [diff] [blame] | 1017 | |
Andy Green | 706961d | 2013-01-17 16:50:35 +0800 | [diff] [blame] | 1018 | return 1; |
| 1019 | } |
Andy Green | ca0a129 | 2013-03-16 11:24:23 +0800 | [diff] [blame] | 1020 | |
| 1021 | /* account for what we're using in rxflow buffer */ |
| 1022 | if (wsi->u.ws.rxflow_buffer) |
| 1023 | wsi->u.ws.rxflow_pos++; |
| 1024 | |
| 1025 | /* process the byte */ |
| 1026 | m = libwebsocket_rx_sm(wsi, buf[n++]); |
Andy Green | 706961d | 2013-01-17 16:50:35 +0800 | [diff] [blame] | 1027 | if (m < 0) |
Andy Green | 7c212cc | 2010-11-08 20:20:42 +0000 | [diff] [blame] | 1028 | return -1; |
Andy Green | 706961d | 2013-01-17 16:50:35 +0800 | [diff] [blame] | 1029 | } |
Andy Green | e77ddd8 | 2010-11-13 10:03:47 +0000 | [diff] [blame] | 1030 | |
Andy Green | 4739e5c | 2011-01-22 12:51:57 +0000 | [diff] [blame] | 1031 | return 0; |
Andy Green | 7c212cc | 2010-11-08 20:20:42 +0000 | [diff] [blame] | 1032 | } |
| 1033 | |
| 1034 | |
Andy Green | 38e57bb | 2011-01-19 12:20:27 +0000 | [diff] [blame] | 1035 | /** |
| 1036 | * libwebsockets_remaining_packet_payload() - Bytes to come before "overall" |
Andy Green | 6964bb5 | 2011-01-23 16:50:33 +0000 | [diff] [blame] | 1037 | * rx packet is complete |
Andy Green | 38e57bb | 2011-01-19 12:20:27 +0000 | [diff] [blame] | 1038 | * @wsi: Websocket instance (available from user callback) |
| 1039 | * |
| 1040 | * This function is intended to be called from the callback if the |
| 1041 | * user code is interested in "complete packets" from the client. |
| 1042 | * libwebsockets just passes through payload as it comes and issues a buffer |
| 1043 | * additionally when it hits a built-in limit. The LWS_CALLBACK_RECEIVE |
| 1044 | * callback handler can use this API to find out if the buffer it has just |
| 1045 | * been given is the last piece of a "complete packet" from the client -- |
| 1046 | * when that is the case libwebsockets_remaining_packet_payload() will return |
| 1047 | * 0. |
| 1048 | * |
| 1049 | * Many protocols won't care becuse their packets are always small. |
| 1050 | */ |
| 1051 | |
Peter Pentchev | 9a4fef7 | 2013-03-30 09:52:21 +0800 | [diff] [blame] | 1052 | LWS_VISIBLE size_t |
Andy Green | 38e57bb | 2011-01-19 12:20:27 +0000 | [diff] [blame] | 1053 | libwebsockets_remaining_packet_payload(struct libwebsocket *wsi) |
| 1054 | { |
Andy Green | 623a98d | 2013-01-21 11:04:23 +0800 | [diff] [blame] | 1055 | return wsi->u.ws.rx_packet_length; |
Andy Green | 38e57bb | 2011-01-19 12:20:27 +0000 | [diff] [blame] | 1056 | } |