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comparison: src/protocols/oscar/flap_connection.c

src/protocols/oscar/flap_connection.c

changeset 14253
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parent 14252
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child 14254
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equal deleted inserted replaced
14252:d10dda2777a9 14253:b63ebf84c42b
1 /*
2 * Gaim's oscar protocol plugin
3 * This file is the legal property of its developers.
4 * Please see the AUTHORS file distributed alongside this file.
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; either
9 * version 2 of the License, or (at your option) any later version.
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 */
20
21 #include "oscar.h"
22
23 #include "eventloop.h"
24 #include "proxy.h"
25
26 #ifndef _WIN32
27 #include <netdb.h>
28 #include <sys/socket.h>
29 #include <netinet/in.h>
30 #endif
31
32 #ifdef _WIN32
33 #include "win32dep.h"
34 #endif
35
36 /**
37 * This sends a channel 1 SNAC containing the FLAP version.
38 * The FLAP version is sent by itself at the beginning of every
39 * connection to a FLAP server. It is always the very first
40 * packet sent by both the server and the client after the SYN,
41 * SYN/ACK, ACK handshake.
42 */
43 void
44 flap_connection_send_version(OscarData *od, FlapConnection *conn)
45 {
46 FlapFrame *frame;
47
48 frame = flap_frame_new(od, 0x01, 4);
49 byte_stream_put32(&frame->data, 0x00000001);
50 flap_connection_send(conn, frame);
51 }
52
53 /**
54 * This sends a channel 1 SNAC containing the FLAP version and
55 * the authentication cookie. This is sent when connecting to
56 * any FLAP server after the initial connection to the auth
57 * server. It is always the very first packet sent by both the
58 * server and the client after the SYN, SYN/ACK, ACK handshake.
59 */
60 void
61 flap_connection_send_version_with_cookie(OscarData *od, FlapConnection *conn, guint16 length, const guint8 *chipsahoy)
62 {
63 FlapFrame *frame;
64 aim_tlvlist_t *tl = NULL;
65
66 frame = flap_frame_new(od, 0x01, 4 + 2 + 2 + length);
67 byte_stream_put32(&frame->data, 0x00000001);
68 aim_tlvlist_add_raw(&tl, 0x0006, length, chipsahoy);
69 aim_tlvlist_write(&frame->data, &tl);
70 aim_tlvlist_free(&tl);
71
72 flap_connection_send(conn, frame);
73 }
74
75 /**
76 * This sends an empty channel 4 SNAC. This is sent to signify
77 * that we're logging off. This shouldn't really be necessary--
78 * usually the AIM server will detect that the TCP connection has
79 * been destroyed--but it's good practice.
80 */
81 static void
82 flap_connection_send_close(OscarData *od, FlapConnection *conn)
83 {
84 FlapFrame *frame;
85
86 frame = flap_frame_new(od, 0x04, 0);
87 flap_connection_send(conn, frame);
88 }
89
90 /**
91 * This sends an empty channel 5 SNAC. This is used as a keepalive
92 * packet in FLAP connections. WinAIM 4.x and higher send these
93 * _every minute_ to keep the connection alive.
94 */
95 void
96 flap_connection_send_keepalive(OscarData *od, FlapConnection *conn)
97 {
98 FlapFrame *frame;
99
100 frame = flap_frame_new(od, 0x05, 0);
101 flap_connection_send(conn, frame);
102
103 /* clean out SNACs over 60sec old */
104 aim_cleansnacs(od, 60);
105 }
106
107 /**
108 * Allocate a new empty connection structure.
109 *
110 * @param od The oscar session associated with this connection.
111 * @param type Type of connection to create
112 *
113 * @return Returns the new connection structure.
114 */
115 FlapConnection *
116 flap_connection_new(OscarData *od, int type)
117 {
118 FlapConnection *conn;
119
120 conn = g_new0(FlapConnection, 1);
121 conn->od = od;
122 conn->buffer_outgoing = gaim_circ_buffer_new(0);
123 conn->fd = -1;
124 conn->subtype = -1;
125 conn->type = type;
126
127 od->oscar_connections = g_list_prepend(od->oscar_connections, conn);
128
129 return conn;
130 }
131
132 /**
133 * Close (but not free) a connection.
134 *
135 * This cancels any currently pending connection attempt,
136 * closes any open fd and frees the auth cookie.
137 *
138 * @param conn The connection to close.
139 */
140 void
141 flap_connection_close(OscarData *od, FlapConnection *conn)
142 {
143 if (conn->connect_info != NULL)
144 {
145 gaim_proxy_connect_cancel(conn->connect_info);
146 conn->connect_info = NULL;
147 }
148
149 if (conn->connect_data != NULL)
150 {
151 if (conn->type == SNAC_FAMILY_CHAT)
152 {
153 oscar_chat_destroy(conn->connect_data);
154 conn->connect_data = NULL;
155 }
156 }
157
158 if (conn->fd != -1)
159 {
160 if (conn->type == SNAC_FAMILY_LOCATE)
161 flap_connection_send_close(od, conn);
162
163 close(conn->fd);
164 conn->fd = -1;
165 }
166 }
167
168 static void
169 flap_connection_destroy_rates(struct rateclass *head)
170 {
171 struct rateclass *rc;
172
173 for (rc = head; rc; )
174 {
175 struct rateclass *tmp;
176 struct snacpair *sp;
177
178 tmp = rc->next;
179
180 for (sp = rc->members; sp; ) {
181 struct snacpair *tmpsp;
182
183 tmpsp = sp->next;
184 free(sp);
185 sp = tmpsp;
186 }
187 free(rc);
188
189 rc = tmp;
190 }
191 }
192
193 static gboolean
194 flap_connection_destroy_cb(gpointer data)
195 {
196 FlapConnection *conn;
197 OscarData *od;
198 GaimAccount *account;
199
200 conn = data;
201 od = conn->od;
202
203 gaim_debug_info("oscar", "Destroying oscar connection of "
204 "type 0x%04hx\n", conn->type);
205
206 flap_connection_close(od, conn);
207
208 g_free(conn->cookie);
209
210 if (conn->watcher_incoming != 0)
211 gaim_input_remove(conn->watcher_incoming);
212 if (conn->watcher_outgoing != 0)
213 gaim_input_remove(conn->watcher_outgoing);
214 g_free(conn->buffer_incoming.data.data);
215 gaim_circ_buffer_destroy(conn->buffer_outgoing);
216
217 /*
218 * Free conn->internal, if necessary
219 */
220 if (conn->type == SNAC_FAMILY_CHAT)
221 flap_connection_destroy_chat(od, conn);
222
223 g_list_free(conn->groups);
224 flap_connection_destroy_rates(conn->rates);
225
226 od->oscar_connections = g_list_remove(od->oscar_connections, conn);
227
228 account = gaim_connection_get_account(od->gc);
229
230 /*
231 * TODO: If we don't have a SNAC_FAMILY_LOCATE connection then
232 * we should try to request one instead of disconnecting.
233 */
234 if (!account->disconnecting && ((od->oscar_connections == NULL)
235 || (!flap_connection_getbytype(od, SNAC_FAMILY_LOCATE))))
236 {
237 /* No more FLAP connections! Sign off this GaimConnection! */
238 const gchar *tmp;
239 if (conn->disconnect_reason == OSCAR_DISCONNECT_REMOTE_CLOSED)
240 tmp = _("Server closed the connection.");
241 else if (conn->disconnect_reason == OSCAR_DISCONNECT_LOST_CONNECTION)
242 tmp = _("Lost connection with server for an unknown reason.");
243 else if (conn->disconnect_reason == OSCAR_DISCONNECT_INVALID_DATA)
244 tmp = _("Received invalid data on connection with server.");
245 else if (conn->disconnect_reason == OSCAR_DISCONNECT_COULD_NOT_CONNECT)
246 tmp = _("Could not establish a connection with the server.");
247 else
248 /*
249 * We shouldn't print a message for some disconnect_reasons.
250 * Like OSCAR_DISCONNECT_LOCAL_CLOSED.
251 */
252 tmp = NULL;
253
254 if (tmp != NULL)
255 gaim_connection_error(od->gc, tmp);
256 }
257
258 g_free(conn);
259
260 return FALSE;
261 }
262
263 void
264 flap_connection_destroy(FlapConnection *conn, OscarDisconnectReason reason)
265 {
266 if (conn->destroy_timeout != 0)
267 gaim_timeout_remove(conn->destroy_timeout);
268 conn->disconnect_reason = reason;
269 flap_connection_destroy_cb(conn);
270 }
271
272 /**
273 * Schedule Gaim to destroy the given FlapConnection as soon as we
274 * return control back to the program's main loop. We must do this
275 * if we want to destroy the connection but we are still using it
276 * for some reason.
277 */
278 void
279 flap_connection_schedule_destroy(FlapConnection *conn, OscarDisconnectReason reason)
280 {
281 if (conn->destroy_timeout != 0)
282 /* Already taken care of */
283 return;
284
285 gaim_debug_info("oscar", "Scheduling destruction of FLAP "
286 "connection of type 0x%04hx\n", conn->type);
287 conn->disconnect_reason = reason;
288 conn->destroy_timeout = gaim_timeout_add(0, flap_connection_destroy_cb, conn);
289 }
290
291 /**
292 * In OSCAR, every connection has a set of SNAC groups associated
293 * with it. These are the groups that you can send over this connection
294 * without being guaranteed a "Not supported" SNAC error.
295 *
296 * The grand theory of things says that these associations transcend
297 * what libfaim calls "connection types" (conn->type). You can probably
298 * see the elegance here, but since I want to revel in it for a bit, you
299 * get to hear it all spelled out.
300 *
301 * So let us say that you have your core BOS connection running. One
302 * of your modules has just given you a SNAC of the group 0x0004 to send
303 * you. Maybe an IM destined for some twit in Greenland. So you start
304 * at the top of your connection list, looking for a connection that
305 * claims to support group 0x0004. You find one. Why, that neat BOS
306 * connection of yours can do that. So you send it on its way.
307 *
308 * Now, say, that fellow from Greenland has friends and they all want to
309 * meet up with you in a lame chat room. This has landed you a SNAC
310 * in the family 0x000e and you have to admit you're a bit lost. You've
311 * searched your connection list for someone who wants to make your life
312 * easy and deliver this SNAC for you, but there isn't one there.
313 *
314 * Here comes the good bit. Without even letting anyone know, particularly
315 * the module that decided to send this SNAC, and definitely not that twit
316 * in Greenland, you send out a service request. In this request, you have
317 * marked the need for a connection supporting group 0x000e. A few seconds
318 * later, you receive a service redirect with an IP address and a cookie in
319 * it. Great, you say. Now I have something to do. Off you go, making
320 * that connection. One of the first things you get from this new server
321 * is a message saying that indeed it does support the group you were looking
322 * for. So you continue and send rate confirmation and all that.
323 *
324 * Then you remember you had that SNAC to send, and now you have a means to
325 * do it, and you do, and everyone is happy. Except the Greenlander, who is
326 * still stuck in the bitter cold.
327 *
328 * Oh, and this is useful for building the Migration SNACs, too. In the
329 * future, this may help convince me to implement rate limit mitigation
330 * for real. We'll see.
331 *
332 * Just to make me look better, I'll say that I've known about this great
333 * scheme for quite some time now. But I still haven't convinced myself
334 * to make libfaim work that way. It would take a fair amount of effort,
335 * and probably some client API changes as well. (Whenever I don't want
336 * to do something, I just say it would change the client API. Then I
337 * instantly have a couple of supporters of not doing it.)
338 *
339 * Generally, addgroup is only called by the internal handling of the
340 * server ready SNAC. So if you want to do something before that, you'll
341 * have to be more creative. That is done rather early, though, so I don't
342 * think you have to worry about it. Unless you're me. I care deeply
343 * about such inane things.
344 *
345 */
346
347 /**
348 * Find a FlapConnection that supports the given oscar
349 * family.
350 */
351 FlapConnection *
352 flap_connection_findbygroup(OscarData *od, guint16 group)
353 {
354 GList *cur;
355
356 for (cur = od->oscar_connections; cur != NULL; cur = cur->next)
357 {
358 FlapConnection *conn;
359 GList *l;
360
361 conn = cur->data;
362
363 for (l = conn->groups; l != NULL; l = l->next)
364 {
365 if (GPOINTER_TO_UINT(l->data) == group)
366 return conn;
367 }
368 }
369
370 return NULL;
371 }
372
373 /**
374 * Locates a connection of the specified type in the
375 * specified session.
376 *
377 * TODO: Use flap_connection_findbygroup everywhere and get rid of this.
378 *
379 * @param od The session to search.
380 * @param type The type of connection to look for.
381 *
382 * @return Returns the first connection found of the given target type,
383 * or NULL if none could be found.
384 */
385 FlapConnection *
386 flap_connection_getbytype(OscarData *od, int type)
387 {
388 GList *cur;
389
390 for (cur = od->oscar_connections; cur != NULL; cur = cur->next)
391 {
392 FlapConnection *conn;
393 conn = cur->data;
394 if ((conn->type == type) && (conn->connected))
395 return conn;
396 }
397
398 return NULL;
399 }
400
401 FlapConnection *
402 flap_connection_getbytype_all(OscarData *od, int type)
403 {
404 GList *cur;
405
406 for (cur = od->oscar_connections; cur; cur = cur->next)
407 {
408 FlapConnection *conn;
409 conn = cur->data;
410 if (conn->type == type)
411 return conn;
412 }
413
414 return NULL;
415 }
416
417 /**
418 * Allocate a new FLAP frame.
419 *
420 * @param channel The FLAP channel. This is almost always 2.
421 */
422 FlapFrame *
423 flap_frame_new(OscarData *od, guint16 channel, int datalen)
424 {
425 FlapFrame *frame;
426
427 frame = g_new0(FlapFrame, 1);
428 frame->channel = channel;
429
430 if (datalen > 0)
431 {
432 guint8 *data;
433 data = g_malloc(datalen);
434 byte_stream_init(&frame->data, data, datalen);
435 }
436
437 return frame;
438 }
439
440 /**
441 * Free a FlapFrame
442 *
443 * @param frame The frame to free.
444 * @return -1 on error; 0 on success.
445 */
446 static void
447 flap_frame_destroy(FlapFrame *frame)
448 {
449 free(frame->data.data);
450 free(frame);
451
452 return;
453 }
454
455 static void
456 parse_snac(OscarData *od, FlapConnection *conn, FlapFrame *frame)
457 {
458 aim_module_t *cur;
459 aim_modsnac_t snac;
460
461 if (byte_stream_empty(&frame->data) < 10)
462 return;
463
464 snac.family = byte_stream_get16(&frame->data);
465 snac.subtype = byte_stream_get16(&frame->data);
466 snac.flags = byte_stream_get16(&frame->data);
467 snac.id = byte_stream_get32(&frame->data);
468
469 /* SNAC flags are apparently uniform across all SNACs, so we handle them here */
470 if (snac.flags & 0x0001) {
471 /*
472 * This means the SNAC will be followed by another SNAC with
473 * related information. We don't need to do anything about
474 * this here.
475 */
476 }
477 if (snac.flags & 0x8000) {
478 /*
479 * This packet contains the version of the family that this SNAC is
480 * in. You get this when your SSI module is version 2 or higher.
481 * For now we have no need for this, but you could always save
482 * it as a part of aim_modnsac_t, or something. The format is...
483 * 2 byte length of total mini-header (which is 6 bytes), then TLV
484 * of type 0x0001, length 0x0002, value is the 2 byte version
485 * number
486 */
487 byte_stream_advance(&frame->data, byte_stream_get16(&frame->data));
488 }
489
490 for (cur = (aim_module_t *)od->modlistv; cur; cur = cur->next) {
491
492 if (!(cur->flags & AIM_MODFLAG_MULTIFAMILY) &&
493 (cur->family != snac.family))
494 continue;
495
496 if (cur->snachandler(od, conn, cur, frame, &snac, &frame->data))
497 return;
498 }
499 }
500
501 static void
502 parse_fakesnac(OscarData *od, FlapConnection *conn, FlapFrame *frame, guint16 family, guint16 subtype)
503 {
504 aim_module_t *cur;
505 aim_modsnac_t snac;
506
507 snac.family = family;
508 snac.subtype = subtype;
509 snac.flags = snac.id = 0;
510
511 for (cur = (aim_module_t *)od->modlistv; cur; cur = cur->next) {
512
513 if (!(cur->flags & AIM_MODFLAG_MULTIFAMILY) &&
514 (cur->family != snac.family))
515 continue;
516
517 if (cur->snachandler(od, conn, cur, frame, &snac, &frame->data))
518 return;
519 }
520 }
521
522 static void
523 parse_flap_ch4(OscarData *od, FlapConnection *conn, FlapFrame *frame)
524 {
525 aim_tlvlist_t *tlvlist;
526 char *msg = NULL;
527 guint16 code = 0;
528 aim_rxcallback_t userfunc;
529
530 if (byte_stream_empty(&frame->data) == 0) {
531 /* XXX should do something with this */
532 return;
533 }
534
535 /* An ICQ account is logging in */
536 if (conn->type == SNAC_FAMILY_AUTH)
537 {
538 parse_fakesnac(od, conn, frame, 0x0017, 0x0003);
539 return;
540 }
541
542 tlvlist = aim_tlvlist_read(&frame->data);
543
544 if (aim_tlv_gettlv(tlvlist, 0x0009, 1))
545 code = aim_tlv_get16(tlvlist, 0x0009, 1);
546
547 if (aim_tlv_gettlv(tlvlist, 0x000b, 1))
548 msg = aim_tlv_getstr(tlvlist, 0x000b, 1);
549
550 if ((userfunc = aim_callhandler(od, AIM_CB_FAM_SPECIAL, AIM_CB_SPECIAL_CONNERR)))
551 userfunc(od, conn, frame, code, msg);
552
553 aim_tlvlist_free(&tlvlist);
554
555 free(msg);
556 }
557
558 /**
559 * Takes a new incoming FLAP frame and sends it to the appropriate
560 * handler function to be parsed.
561 */
562 static void
563 parse_flap(OscarData *od, FlapConnection *conn, FlapFrame *frame)
564 {
565 if (frame->channel == 0x01) {
566 guint32 flap_version = byte_stream_get32(&frame->data);
567 if (flap_version != 0x00000001)
568 {
569 /* Error! */
570 gaim_debug_warning("oscar", "Expecting FLAP version "
571 "0x00000001 but received FLAP version %08lx. Closing connection.\n",
572 flap_version);
573 flap_connection_schedule_destroy(conn,
574 OSCAR_DISCONNECT_INVALID_DATA);
575 }
576 else
577 conn->connected = TRUE;
578
579 } else if (frame->channel == 0x02) {
580 parse_snac(od, conn, frame);
581
582 } else if (frame->channel == 0x04) {
583 parse_flap_ch4(od, conn, frame);
584
585 } else if (frame->channel == 0x05) {
586 /* TODO: Reset our keepalive watchdog? */
587
588 }
589 }
590
591 /**
592 * Read in all available data on the socket for a given connection.
593 * All complete FLAPs handled immedate after they're received.
594 * Incomplete FLAP data is stored locally and appended to the next
595 * time this callback is triggered.
596 */
597 void
598 flap_connection_recv_cb(gpointer data, gint source, GaimInputCondition cond)
599 {
600 FlapConnection *conn;
601 ssize_t read;
602 guint8 header[6];
603
604 conn = data;
605
606 /* Read data until we run out of data and break out of the loop */
607 while (TRUE)
608 {
609 /* Start reading a new FLAP */
610 if (conn->buffer_incoming.data.data == NULL)
611 {
612 /* Peek at the first 6 bytes to get the length */
613 read = recv(conn->fd, &header, 6, MSG_PEEK);
614
615 /* Check if the FLAP server closed the connection */
616 if (read == 0)
617 {
618 flap_connection_schedule_destroy(conn,
619 OSCAR_DISCONNECT_REMOTE_CLOSED);
620 break;
621 }
622
623 /* If there was an error then close the connection */
624 if (read == -1)
625 {
626 if ((errno == EAGAIN) || (errno == EWOULDBLOCK))
627 /* No worries */
628 break;
629
630 /* Error! */
631 flap_connection_schedule_destroy(conn,
632 OSCAR_DISCONNECT_LOST_CONNECTION);
633 break;
634 }
635
636 /* If we don't even have a complete FLAP header then do nothing */
637 if (read < 6)
638 break;
639
640 /* Read the first 6 bytes (the FLAP header) */
641 read = recv(conn->fd, &header, 6, 0);
642
643 /* All FLAP frames must start with the byte 0x2a */
644 if (aimutil_get8(&header[0]) != 0x2a)
645 {
646 flap_connection_schedule_destroy(conn,
647 OSCAR_DISCONNECT_INVALID_DATA);
648 break;
649 }
650
651 /* Initialize a new temporary FlapFrame for incoming data */
652 conn->buffer_incoming.channel = aimutil_get8(&header[1]);
653 conn->buffer_incoming.seqnum = aimutil_get16(&header[2]);
654 conn->buffer_incoming.data.len = aimutil_get16(&header[4]);
655 conn->buffer_incoming.data.data = g_new(guint8, conn->buffer_incoming.data.len);
656 conn->buffer_incoming.data.offset = 0;
657 }
658
659 if (conn->buffer_incoming.data.len - conn->buffer_incoming.data.offset)
660 {
661 /* Read data into the temporary FlapFrame until it is complete */
662 read = recv(conn->fd,
663 &conn->buffer_incoming.data.data[conn->buffer_incoming.data.offset],
664 conn->buffer_incoming.data.len - conn->buffer_incoming.data.offset,
665 0);
666
667 /* Check if the FLAP server closed the connection */
668 if (read == 0)
669 {
670 flap_connection_schedule_destroy(conn,
671 OSCAR_DISCONNECT_REMOTE_CLOSED);
672 break;
673 }
674
675 if (read == -1)
676 {
677 if ((errno == EAGAIN) || (errno == EWOULDBLOCK))
678 /* No worries */
679 break;
680
681 /* Error! */
682 flap_connection_schedule_destroy(conn,
683 OSCAR_DISCONNECT_LOST_CONNECTION);
684 break;
685 }
686
687 conn->buffer_incoming.data.offset += read;
688 if (conn->buffer_incoming.data.offset < conn->buffer_incoming.data.len)
689 /* Waiting for more data to arrive */
690 break;
691 }
692
693 /* We have a complete FLAP! Handle it and continue reading */
694 byte_stream_rewind(&conn->buffer_incoming.data);
695 parse_flap(conn->od, conn, &conn->buffer_incoming);
696 conn->lastactivity = time(NULL);
697
698 g_free(conn->buffer_incoming.data.data);
699 conn->buffer_incoming.data.data = NULL;
700 }
701 }
702
703 static void
704 send_cb(gpointer data, gint source, GaimInputCondition cond)
705 {
706 FlapConnection *conn;
707 int writelen, ret;
708
709 conn = data;
710 writelen = gaim_circ_buffer_get_max_read(conn->buffer_outgoing);
711
712 if (writelen == 0)
713 {
714 gaim_input_remove(conn->watcher_outgoing);
715 conn->watcher_outgoing = 0;
716 return;
717 }
718
719 ret = send(conn->fd, conn->buffer_outgoing->outptr, writelen, 0);
720 if (ret <= 0)
721 {
722 if ((errno == EAGAIN) || (errno == EWOULDBLOCK))
723 /* No worries */
724 return;
725
726 /* Error! */
727 flap_connection_schedule_destroy(conn, OSCAR_DISCONNECT_LOST_CONNECTION);
728 return;
729 }
730
731 gaim_circ_buffer_mark_read(conn->buffer_outgoing, ret);
732 }
733
734 static void
735 flap_connection_send_byte_stream(ByteStream *bs, FlapConnection *conn, size_t count)
736 {
737 if (conn == NULL)
738 return;
739
740 /* Make sure we don't send past the end of the bs */
741 if (count > byte_stream_empty(bs))
742 count = byte_stream_empty(bs); /* truncate to remaining space */
743
744 if (count == 0)
745 return;
746
747 /* Add everything to our outgoing buffer */
748 gaim_circ_buffer_append(conn->buffer_outgoing, bs->data, count);
749
750 /* If we haven't already started writing stuff, then start the cycle */
751 if (conn->watcher_outgoing == 0)
752 {
753 conn->watcher_outgoing = gaim_input_add(conn->fd,
754 GAIM_INPUT_WRITE, send_cb, conn);
755 send_cb(conn, conn->fd, 0);
756 }
757 }
758
759 static void
760 sendframe_flap(FlapConnection *conn, FlapFrame *frame)
761 {
762 ByteStream bs;
763 int payloadlen, bslen;
764
765 payloadlen = byte_stream_curpos(&frame->data);
766
767 byte_stream_init(&bs, malloc(6 + payloadlen), 6 + payloadlen);
768
769 /* FLAP header */
770 byte_stream_put8(&bs, 0x2a);
771 byte_stream_put8(&bs, frame->channel);
772 byte_stream_put16(&bs, frame->seqnum);
773 byte_stream_put16(&bs, payloadlen);
774
775 /* Payload */
776 byte_stream_rewind(&frame->data);
777 byte_stream_putbs(&bs, &frame->data, payloadlen);
778
779 bslen = byte_stream_curpos(&bs);
780 byte_stream_rewind(&bs);
781 flap_connection_send_byte_stream(&bs, conn, bslen);
782
783 free(bs.data); /* XXX byte_stream_free */
784 }
785
786 void
787 flap_connection_send(FlapConnection *conn, FlapFrame *frame)
788 {
789 frame->seqnum = ++(conn->seqnum);
790 sendframe_flap(conn, frame);
791 flap_frame_destroy(frame);
792 }
793

Mercurial Repository: pidgin3

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