comparison: src/protocols/yahoo/yahoo_packet.c
src/protocols/yahoo/yahoo_packet.c
- changeset 14253
- b63ebf84c42b
- parent 14252
- d10dda2777a9
- child 14254
- 77edc7a6191a
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| 14252:d10dda2777a9 | 14253:b63ebf84c42b |
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| 1 /* | |
| 2 * gaim | |
| 3 * | |
| 4 * Gaim is the legal property of its developers, whose names are too numerous | |
| 5 * to list here. Please refer to the COPYRIGHT file distributed with this | |
| 6 * source distribution. | |
| 7 * | |
| 8 * This program is free software; you can redistribute it and/or modify | |
| 9 * it under the terms of the GNU General Public License as published by | |
| 10 * the Free Software Foundation; either version 2 of the License, or | |
| 11 * (at your option) any later version. | |
| 12 * | |
| 13 * This program is distributed in the hope that it will be useful, | |
| 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 16 * GNU General Public License for more details. | |
| 17 * | |
| 18 * You should have received a copy of the GNU General Public License | |
| 19 * along with this program; if not, write to the Free Software | |
| 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 21 * | |
| 22 */ | |
| 23 | |
| 24 #include "internal.h" | |
| 25 #include "debug.h" | |
| 26 | |
| 27 #include "yahoo.h" | |
| 28 #include "yahoo_packet.h" | |
| 29 | |
| 30 struct yahoo_packet *yahoo_packet_new(enum yahoo_service service, enum yahoo_status status, int id) | |
| 31 { | |
| 32 struct yahoo_packet *pkt = g_new0(struct yahoo_packet, 1); | |
| 33 | |
| 34 pkt->service = service; | |
| 35 pkt->status = status; | |
| 36 pkt->id = id; | |
| 37 | |
| 38 return pkt; | |
| 39 } | |
| 40 | |
| 41 void yahoo_packet_hash_str(struct yahoo_packet *pkt, int key, const char *value) | |
| 42 { | |
| 43 struct yahoo_pair *pair; | |
| 44 | |
| 45 g_return_if_fail(value != NULL); | |
| 46 | |
| 47 pair = g_new0(struct yahoo_pair, 1); | |
| 48 pair->key = key; | |
| 49 pair->value = g_strdup(value); | |
| 50 pkt->hash = g_slist_prepend(pkt->hash, pair); | |
| 51 } | |
| 52 | |
| 53 void yahoo_packet_hash_int(struct yahoo_packet *pkt, int key, int value) | |
| 54 { | |
| 55 struct yahoo_pair *pair; | |
| 56 | |
| 57 pair = g_new0(struct yahoo_pair, 1); | |
| 58 pair->key = key; | |
| 59 pair->value = g_strdup_printf("%d", value); | |
| 60 pkt->hash = g_slist_prepend(pkt->hash, pair); | |
| 61 } | |
| 62 | |
| 63 void yahoo_packet_hash(struct yahoo_packet *pkt, const char *fmt, ...) | |
| 64 { | |
| 65 char *strval; | |
| 66 int key, intval; | |
| 67 const char *cur; | |
| 68 va_list ap; | |
| 69 | |
| 70 va_start(ap, fmt); | |
| 71 for (cur = fmt; *cur; cur++) { | |
| 72 key = va_arg(ap, int); | |
| 73 switch (*cur) { | |
| 74 case 'i': | |
| 75 intval = va_arg(ap, int); | |
| 76 yahoo_packet_hash_int(pkt, key, intval); | |
| 77 break; | |
| 78 case 's': | |
| 79 strval = va_arg(ap, char *); | |
| 80 yahoo_packet_hash_str(pkt, key, strval); | |
| 81 break; | |
| 82 default: | |
| 83 gaim_debug_error("yahoo", "Invalid format character '%c'\n", *cur); | |
| 84 break; | |
| 85 } | |
| 86 } | |
| 87 va_end(ap); | |
| 88 } | |
| 89 | |
| 90 size_t yahoo_packet_length(struct yahoo_packet *pkt) | |
| 91 { | |
| 92 GSList *l; | |
| 93 | |
| 94 size_t len = 0; | |
| 95 | |
| 96 l = pkt->hash; | |
| 97 while (l) { | |
| 98 struct yahoo_pair *pair = l->data; | |
| 99 int tmp = pair->key; | |
| 100 do { | |
| 101 tmp /= 10; | |
| 102 len++; | |
| 103 } while (tmp); | |
| 104 len += 2; | |
| 105 len += strlen(pair->value); | |
| 106 len += 2; | |
| 107 l = l->next; | |
| 108 } | |
| 109 | |
| 110 return len; | |
| 111 } | |
| 112 | |
| 113 void yahoo_packet_read(struct yahoo_packet *pkt, const guchar *data, int len) | |
| 114 { | |
| 115 int pos = 0; | |
| 116 char key[64], *delimiter, *esc; | |
| 117 gboolean accept; | |
| 118 int x; | |
| 119 struct yahoo_pair *pair; | |
| 120 | |
| 121 while (pos + 1 < len) | |
| 122 { | |
| 123 /* this is weird, and in one of the chat packets, and causes us to | |
| 124 * think all the values are keys and all the keys are values after | |
| 125 * this point if we don't handle it */ | |
| 126 if (data[pos] == '\0') { | |
| 127 while (pos + 1 < len) { | |
| 128 if (data[pos] == 0xc0 && data[pos + 1] == 0x80) | |
| 129 break; | |
| 130 pos++; | |
| 131 } | |
| 132 pos += 2; | |
| 133 continue; | |
| 134 } | |
| 135 | |
| 136 pair = g_new0(struct yahoo_pair, 1); | |
| 137 | |
| 138 x = 0; | |
| 139 while (pos + 1 < len) { | |
| 140 if (data[pos] == 0xc0 && data[pos + 1] == 0x80) | |
| 141 break; | |
| 142 if (x >= sizeof(key)-1) { | |
| 143 x++; | |
| 144 pos++; | |
| 145 continue; | |
| 146 } | |
| 147 key[x++] = data[pos++]; | |
| 148 } | |
| 149 if (x >= sizeof(key)-1) { | |
| 150 x = 0; | |
| 151 } | |
| 152 key[x] = 0; | |
| 153 pos += 2; | |
| 154 pair->key = strtol(key, NULL, 10); | |
| 155 accept = x; /* if x is 0 there was no key, so don't accept it */ | |
| 156 | |
| 157 if (len - pos + 1 <= 0) { | |
| 158 /* Truncated. Garbage or something. */ | |
| 159 accept = FALSE; | |
| 160 } | |
| 161 | |
| 162 if (accept) { | |
| 163 delimiter = strstr((char *)&data[pos], "\xc0\x80"); | |
| 164 if (delimiter == NULL) | |
| 165 { | |
| 166 /* Malformed packet! (it doesn't end in 0xc0 0x80) */ | |
| 167 g_free(pair); | |
| 168 pos = len; | |
| 169 continue; | |
| 170 } | |
| 171 x = (guint64)delimiter - (guint64)data; | |
| 172 pair->value = g_strndup((const gchar *)&data[pos], x - pos); | |
| 173 pos = x; | |
| 174 pkt->hash = g_slist_prepend(pkt->hash, pair); | |
| 175 | |
| 176 #ifdef DEBUG | |
| 177 esc = g_strescape(pair->value, NULL); | |
| 178 gaim_debug(GAIM_DEBUG_MISC, "yahoo", | |
| 179 "Key: %d \tValue: %s\n", pair->key, esc); | |
| 180 g_free(esc); | |
| 181 #endif | |
| 182 } else { | |
| 183 g_free(pair); | |
| 184 } | |
| 185 pos += 2; | |
| 186 | |
| 187 /* Skip over garbage we've noticed in the mail notifications */ | |
| 188 if (data[0] == '9' && data[pos] == 0x01) | |
| 189 pos++; | |
| 190 } | |
| 191 | |
| 192 /* | |
| 193 * Originally this function used g_slist_append(). I changed | |
| 194 * it to use g_slist_prepend() for improved performance. | |
| 195 * Ideally the Yahoo! PRPL code would be indifferent to the | |
| 196 * order of the key/value pairs, but I don't know if this is | |
| 197 * the case for all incoming messages. To be on the safe side | |
| 198 * we reverse the list. | |
| 199 */ | |
| 200 pkt->hash = g_slist_reverse(pkt->hash); | |
| 201 } | |
| 202 | |
| 203 void yahoo_packet_write(struct yahoo_packet *pkt, guchar *data) | |
| 204 { | |
| 205 GSList *l = pkt->hash; | |
| 206 int pos = 0; | |
| 207 | |
| 208 while (l) { | |
| 209 struct yahoo_pair *pair = l->data; | |
| 210 gchar buf[100]; | |
| 211 | |
| 212 g_snprintf(buf, sizeof(buf), "%d", pair->key); | |
| 213 strcpy((char *)&data[pos], buf); | |
| 214 pos += strlen(buf); | |
| 215 data[pos++] = 0xc0; | |
| 216 data[pos++] = 0x80; | |
| 217 | |
| 218 strcpy((char *)&data[pos], pair->value); | |
| 219 pos += strlen(pair->value); | |
| 220 data[pos++] = 0xc0; | |
| 221 data[pos++] = 0x80; | |
| 222 | |
| 223 l = l->next; | |
| 224 } | |
| 225 } | |
| 226 | |
| 227 void yahoo_packet_dump(guchar *data, int len) | |
| 228 { | |
| 229 #ifdef YAHOO_DEBUG | |
| 230 int i; | |
| 231 | |
| 232 gaim_debug(GAIM_DEBUG_MISC, "yahoo", ""); | |
| 233 | |
| 234 for (i = 0; i + 1 < len; i += 2) { | |
| 235 if ((i % 16 == 0) && i) { | |
| 236 gaim_debug(GAIM_DEBUG_MISC, NULL, "\n"); | |
| 237 gaim_debug(GAIM_DEBUG_MISC, "yahoo", ""); | |
| 238 } | |
| 239 | |
| 240 gaim_debug(GAIM_DEBUG_MISC, NULL, "%02x%02x ", data[i], data[i + 1]); | |
| 241 } | |
| 242 if (i < len) | |
| 243 gaim_debug(GAIM_DEBUG_MISC, NULL, "%02x", data[i]); | |
| 244 | |
| 245 gaim_debug(GAIM_DEBUG_MISC, NULL, "\n"); | |
| 246 gaim_debug(GAIM_DEBUG_MISC, "yahoo", ""); | |
| 247 | |
| 248 for (i = 0; i < len; i++) { | |
| 249 if ((i % 16 == 0) && i) { | |
| 250 gaim_debug(GAIM_DEBUG_MISC, NULL, "\n"); | |
| 251 gaim_debug(GAIM_DEBUG_MISC, "yahoo", ""); | |
| 252 } | |
| 253 | |
| 254 if (g_ascii_isprint(data[i])) | |
| 255 gaim_debug(GAIM_DEBUG_MISC, NULL, "%c ", data[i]); | |
| 256 else | |
| 257 gaim_debug(GAIM_DEBUG_MISC, NULL, ". "); | |
| 258 } | |
| 259 | |
| 260 gaim_debug(GAIM_DEBUG_MISC, NULL, "\n"); | |
| 261 #endif | |
| 262 } | |
| 263 | |
| 264 static void | |
| 265 yahoo_packet_send_can_write(gpointer data, gint source, GaimInputCondition cond) | |
| 266 { | |
| 267 struct yahoo_data *yd = data; | |
| 268 int ret, writelen; | |
| 269 | |
| 270 writelen = gaim_circ_buffer_get_max_read(yd->txbuf); | |
| 271 | |
| 272 if (writelen == 0) { | |
| 273 gaim_input_remove(yd->txhandler); | |
| 274 yd->txhandler = -1; | |
| 275 return; | |
| 276 } | |
| 277 | |
| 278 ret = write(yd->fd, yd->txbuf->outptr, writelen); | |
| 279 | |
| 280 if (ret < 0 && errno == EAGAIN) | |
| 281 return; | |
| 282 else if (ret < 0) { | |
| 283 /* TODO: what to do here - do we really have to disconnect? */ | |
| 284 gaim_connection_error(yd->gc, _("Write Error")); | |
| 285 return; | |
| 286 } | |
| 287 | |
| 288 gaim_circ_buffer_mark_read(yd->txbuf, ret); | |
| 289 } | |
| 290 | |
| 291 | |
| 292 size_t yahoo_packet_build(struct yahoo_packet *pkt, int pad, gboolean wm, | |
| 293 guchar **buf) | |
| 294 { | |
| 295 size_t pktlen = yahoo_packet_length(pkt); | |
| 296 size_t len = YAHOO_PACKET_HDRLEN + pktlen; | |
| 297 guchar *data; | |
| 298 int pos = 0; | |
| 299 | |
| 300 data = g_malloc0(len + 1); | |
| 301 | |
| 302 memcpy(data + pos, "YMSG", 4); pos += 4; | |
| 303 | |
| 304 if (wm) | |
| 305 pos += yahoo_put16(data + pos, YAHOO_WEBMESSENGER_PROTO_VER); | |
| 306 else | |
| 307 pos += yahoo_put16(data + pos, YAHOO_PROTO_VER); | |
| 308 pos += yahoo_put16(data + pos, 0x0000); | |
| 309 pos += yahoo_put16(data + pos, pktlen + pad); | |
| 310 pos += yahoo_put16(data + pos, pkt->service); | |
| 311 pos += yahoo_put32(data + pos, pkt->status); | |
| 312 pos += yahoo_put32(data + pos, pkt->id); | |
| 313 | |
| 314 yahoo_packet_write(pkt, data + pos); | |
| 315 | |
| 316 *buf = data; | |
| 317 | |
| 318 return len; | |
| 319 } | |
| 320 | |
| 321 int yahoo_packet_send(struct yahoo_packet *pkt, struct yahoo_data *yd) | |
| 322 { | |
| 323 size_t len; | |
| 324 int ret; | |
| 325 guchar *data; | |
| 326 | |
| 327 if (yd->fd < 0) | |
| 328 return -1; | |
| 329 | |
| 330 len = yahoo_packet_build(pkt, 0, yd->wm, &data); | |
| 331 | |
| 332 yahoo_packet_dump(data, len); | |
| 333 if (yd->txhandler == -1) | |
| 334 ret = write(yd->fd, data, len); | |
| 335 else { | |
| 336 ret = -1; | |
| 337 errno = EAGAIN; | |
| 338 } | |
| 339 | |
| 340 if (ret < 0 && errno == EAGAIN) | |
| 341 ret = 0; | |
| 342 else if (ret <= 0) { | |
| 343 gaim_debug_warning("yahoo", "Only wrote %d of %d bytes!", ret, len); | |
| 344 g_free(data); | |
| 345 return ret; | |
| 346 } | |
| 347 | |
| 348 if (ret < len) { | |
| 349 if (yd->txhandler == -1) | |
| 350 yd->txhandler = gaim_input_add(yd->fd, GAIM_INPUT_WRITE, | |
| 351 yahoo_packet_send_can_write, yd); | |
| 352 gaim_circ_buffer_append(yd->txbuf, data + ret, len - ret); | |
| 353 } | |
| 354 | |
| 355 g_free(data); | |
| 356 | |
| 357 return ret; | |
| 358 } | |
| 359 | |
| 360 int yahoo_packet_send_and_free(struct yahoo_packet *pkt, struct yahoo_data *yd) | |
| 361 { | |
| 362 int ret; | |
| 363 | |
| 364 ret = yahoo_packet_send(pkt, yd); | |
| 365 yahoo_packet_free(pkt); | |
| 366 return ret; | |
| 367 } | |
| 368 | |
| 369 void yahoo_packet_free(struct yahoo_packet *pkt) | |
| 370 { | |
| 371 while (pkt->hash) { | |
| 372 struct yahoo_pair *pair = pkt->hash->data; | |
| 373 g_free(pair->value); | |
| 374 g_free(pair); | |
| 375 pkt->hash = g_slist_remove(pkt->hash, pair); | |
| 376 } | |
| 377 g_free(pkt); | |
| 378 } |
