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Commit | Line | Data |
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9de3ca7e | 1 | /* |
24286d93 | 2 | * aim_txqueue.c |
3 | * | |
4 | * Herein lies all the mangement routines for the transmit (Tx) queue. | |
5 | * | |
9de3ca7e | 6 | */ |
7 | ||
a25832e6 | 8 | #include <faim/aim.h> |
9de3ca7e | 9 | |
5ac21963 | 10 | #ifndef _WIN32 |
11 | #include <sys/socket.h> | |
12 | #endif | |
13 | ||
f1a5efe0 | 14 | /* |
15 | * Allocate a new tx frame. | |
16 | * | |
17 | * This is more for looks than anything else. | |
5b79dc93 | 18 | * |
19 | * Right now, that is. If/when we implement a pool of transmit | |
20 | * frames, this will become the request-an-unused-frame part. | |
b69540e3 | 21 | * |
22 | * framing = AIM_FRAMETYPE_OFT/OSCAR | |
23 | * chan = channel for OSCAR, hdrtype for OFT | |
24 | * | |
f1a5efe0 | 25 | */ |
5ac21963 | 26 | faim_internal struct command_tx_struct *aim_tx_new(unsigned char framing, int chan, struct aim_conn_t *conn, int datalen) |
f1a5efe0 | 27 | { |
28 | struct command_tx_struct *new; | |
29 | ||
e88ba395 | 30 | if (!conn) { |
31 | printf("aim_tx_new: ERROR: no connection specified\n"); | |
5b79dc93 | 32 | return NULL; |
e88ba395 | 33 | } |
5b79dc93 | 34 | |
f1a5efe0 | 35 | new = (struct command_tx_struct *)malloc(sizeof(struct command_tx_struct)); |
36 | if (!new) | |
37 | return NULL; | |
38 | memset(new, 0, sizeof(struct command_tx_struct)); | |
39 | ||
5b79dc93 | 40 | new->conn = conn; |
5b79dc93 | 41 | |
42 | if(datalen) { | |
43 | new->data = (u_char *)malloc(datalen); | |
44 | new->commandlen = datalen; | |
b69540e3 | 45 | } else |
46 | new->data = NULL; | |
47 | ||
48 | new->hdrtype = framing; | |
49 | if (new->hdrtype == AIM_FRAMETYPE_OSCAR) { | |
50 | new->hdr.oscar.type = chan; | |
51 | } else if (new->hdrtype == AIM_FRAMETYPE_OFT) { | |
52 | new->hdr.oft.type = chan; | |
53 | new->hdr.oft.hdr2len = 0; /* this will get setup by caller */ | |
54 | } else { | |
55 | printf("tx_new: unknown framing\n"); | |
5b79dc93 | 56 | } |
57 | ||
f1a5efe0 | 58 | return new; |
59 | } | |
60 | ||
9de3ca7e | 61 | /* |
e88ba395 | 62 | * aim_tx_enqeue__queuebased() |
24286d93 | 63 | * |
64 | * The overall purpose here is to enqueue the passed in command struct | |
65 | * into the outgoing (tx) queue. Basically... | |
66 | * 1) Make a scope-irrelevent copy of the struct | |
67 | * 2) Lock the struct | |
68 | * 3) Mark as not-sent-yet | |
69 | * 4) Enqueue the struct into the list | |
70 | * 5) Unlock the struct once it's linked in | |
71 | * 6) Return | |
72 | * | |
e88ba395 | 73 | * Note that this is only used when doing queue-based transmitting; |
74 | * that is, when sess->tx_enqueue is set to &aim_tx_enqueue__queuebased. | |
75 | * | |
9de3ca7e | 76 | */ |
78b3fb13 | 77 | faim_internal int aim_tx_enqueue__queuebased(struct aim_session_t *sess, |
78 | struct command_tx_struct *newpacket) | |
9de3ca7e | 79 | { |
b8d0da45 | 80 | struct command_tx_struct *cur; |
9de3ca7e | 81 | |
b8d0da45 | 82 | if (newpacket->conn == NULL) { |
5b79dc93 | 83 | faimdprintf(1, "aim_tx_enqueue: WARNING: enqueueing packet with no connecetion\n"); |
a25832e6 | 84 | newpacket->conn = aim_getconn_type(sess, AIM_CONN_TYPE_BOS); |
b8d0da45 | 85 | } |
9de3ca7e | 86 | |
b69540e3 | 87 | if (newpacket->hdrtype == AIM_FRAMETYPE_OSCAR) { |
88 | /* assign seqnum */ | |
89 | newpacket->hdr.oscar.seqnum = aim_get_next_txseqnum(newpacket->conn); | |
90 | } | |
9de3ca7e | 91 | /* set some more fields */ |
5b79dc93 | 92 | newpacket->lock = 1; /* lock */ |
93 | newpacket->sent = 0; /* not sent yet */ | |
94 | newpacket->next = NULL; /* always last */ | |
9de3ca7e | 95 | |
b8d0da45 | 96 | /* see overhead note in aim_rxqueue counterpart */ |
97 | if (sess->queue_outgoing == NULL) { | |
5b79dc93 | 98 | sess->queue_outgoing = newpacket; |
b8d0da45 | 99 | } else { |
100 | for (cur = sess->queue_outgoing; | |
101 | cur->next; | |
102 | cur = cur->next) | |
103 | ; | |
5b79dc93 | 104 | cur->next = newpacket; |
b8d0da45 | 105 | } |
9de3ca7e | 106 | |
5b79dc93 | 107 | newpacket->lock = 0; /* unlock so it can be sent */ |
9de3ca7e | 108 | |
b8d0da45 | 109 | #if debug == 2 |
110 | faimdprintf(2, "calling aim_tx_printqueue()\n"); | |
0c20631f | 111 | aim_tx_printqueue(sess); |
b8d0da45 | 112 | faimdprintf(2, "back from aim_tx_printqueue()\n"); |
9de3ca7e | 113 | #endif |
114 | ||
115 | return 0; | |
116 | } | |
117 | ||
e88ba395 | 118 | /* |
119 | * aim_tx_enqueue__immediate() | |
120 | * | |
121 | * Parallel to aim_tx_enqueue__queuebased, however, this bypasses | |
122 | * the whole queue mess when you want immediate writes to happen. | |
123 | * | |
124 | * Basically the same as its __queuebased couterpart, however | |
125 | * instead of doing a list append, it just calls aim_tx_sendframe() | |
126 | * right here. | |
127 | * | |
128 | */ | |
78b3fb13 | 129 | faim_internal int aim_tx_enqueue__immediate(struct aim_session_t *sess, struct command_tx_struct *newpacket) |
e88ba395 | 130 | { |
131 | if (newpacket->conn == NULL) { | |
132 | faimdprintf(1, "aim_tx_enqueue: ERROR: packet has no connection\n"); | |
133 | if (newpacket->data) | |
134 | free(newpacket->data); | |
135 | free(newpacket); | |
136 | return -1; | |
137 | } | |
138 | ||
b69540e3 | 139 | if (newpacket->hdrtype == AIM_FRAMETYPE_OSCAR) |
140 | newpacket->hdr.oscar.seqnum = aim_get_next_txseqnum(newpacket->conn); | |
e88ba395 | 141 | |
142 | newpacket->lock = 1; /* lock */ | |
143 | newpacket->sent = 0; /* not sent yet */ | |
144 | ||
68ac63c2 | 145 | aim_tx_sendframe(sess, newpacket); |
e88ba395 | 146 | |
147 | if (newpacket->data) | |
148 | free(newpacket->data); | |
149 | free(newpacket); | |
150 | ||
151 | return 0; | |
152 | } | |
153 | ||
9de3ca7e | 154 | /* |
a25832e6 | 155 | * aim_get_next_txseqnum() |
156 | * | |
157 | * This increments the tx command count, and returns the seqnum | |
158 | * that should be stamped on the next FLAP packet sent. This is | |
159 | * normally called during the final step of packet preparation | |
160 | * before enqueuement (in aim_tx_enqueue()). | |
161 | * | |
9de3ca7e | 162 | */ |
78b3fb13 | 163 | faim_internal unsigned int aim_get_next_txseqnum(struct aim_conn_t *conn) |
9de3ca7e | 164 | { |
df5a99fb | 165 | u_int ret; |
166 | ||
167 | faim_mutex_lock(&conn->seqnum_lock); | |
168 | ret = ++conn->seqnum; | |
169 | faim_mutex_unlock(&conn->seqnum_lock); | |
170 | return ret; | |
9de3ca7e | 171 | } |
172 | ||
173 | /* | |
a25832e6 | 174 | * aim_tx_printqueue() |
175 | * | |
176 | * This is basically for debuging purposes only. It dumps all the | |
177 | * records in the tx queue and their current status. Very helpful | |
178 | * if the queue isn't working quite right. | |
179 | * | |
9de3ca7e | 180 | */ |
b8d0da45 | 181 | #if debug == 2 |
78b3fb13 | 182 | faim_internal int aim_tx_printqueue(struct aim_session_t *sess) |
9de3ca7e | 183 | { |
b8d0da45 | 184 | struct command_tx_struct *cur; |
9de3ca7e | 185 | |
b8d0da45 | 186 | faimdprintf(2, "\ncurrent aim_queue_outgoing...\n"); |
187 | faimdprintf(2, "\ttype seqnum len lock sent\n"); | |
188 | ||
189 | if (sess->queue_outgoing == NULL) | |
190 | faimdprintf(2, "aim_tx_flushqueue(): queue empty"); | |
191 | else { | |
192 | for (cur = sess->queue_outgoing; cur; cur = cur->next) { | |
b69540e3 | 193 | faimdprintf(2, "\t %2x %2x %4x %4x %1d %1d\n", |
194 | cur->hdrtype, | |
195 | (cur->hdrtype==AIM_FRAMETYPE_OFT)?cur->hdr.oft.type:cur->hdr.oscar.type, | |
196 | (cur->hdrtype==AIM_FRAMETYPE_OSCAR)?cur->seqnum:0, | |
b8d0da45 | 197 | cur->commandlen, cur->lock, |
198 | cur->sent); | |
199 | } | |
200 | } | |
9de3ca7e | 201 | |
b8d0da45 | 202 | faimdprintf(2, "\n(done printing queue)\n"); |
9de3ca7e | 203 | |
204 | return 0; | |
205 | } | |
206 | #endif | |
207 | ||
208 | /* | |
a25832e6 | 209 | * aim_tx_flushqueue() |
210 | * | |
211 | * This the function is responsable for putting the queued commands | |
212 | * onto the wire. This function is critical to the operation of | |
213 | * the queue and therefore is the most prone to brokenness. It | |
214 | * seems to be working quite well at this point. | |
215 | * | |
216 | * Procedure: | |
217 | * 1) Traverse the list, only operate on commands that are unlocked | |
218 | * and haven't been sent yet. | |
219 | * 2) Lock the struct | |
220 | * 3) Allocate a temporary buffer to store the finished, fully | |
221 | * processed packet in. | |
222 | * 4) Build the packet from the command_tx_struct data. | |
223 | * 5) Write the packet to the socket. | |
224 | * 6) If success, mark the packet sent, if fail report failure, do NOT | |
225 | * mark the packet sent (so it will not get purged and therefore | |
226 | * be attempted again on next call). | |
227 | * 7) Unlock the struct. | |
228 | * 8) Free the temp buffer | |
229 | * 9) Step to next struct in list and go back to 1. | |
230 | * | |
9de3ca7e | 231 | */ |
78b3fb13 | 232 | faim_internal int aim_tx_sendframe(struct aim_session_t *sess, struct command_tx_struct *cur) |
e88ba395 | 233 | { |
b69540e3 | 234 | int buflen = 0; |
235 | unsigned char *curPacket; | |
e88ba395 | 236 | |
237 | if (!cur) | |
238 | return -1; /* fatal */ | |
239 | ||
240 | cur->lock = 1; /* lock the struct */ | |
241 | ||
b69540e3 | 242 | if (cur->hdrtype == AIM_FRAMETYPE_OSCAR) |
243 | buflen = cur->commandlen + 6; | |
244 | else if (cur->hdrtype == AIM_FRAMETYPE_OFT) | |
245 | buflen = cur->hdr.oft.hdr2len + 8; | |
246 | else { | |
247 | cur->lock = 0; | |
248 | return -1; | |
249 | } | |
250 | ||
e88ba395 | 251 | /* allocate full-packet buffer */ |
b69540e3 | 252 | if (!(curPacket = (unsigned char *) malloc(buflen))) { |
253 | cur->lock = 0; | |
254 | return -1; | |
255 | } | |
e88ba395 | 256 | |
b69540e3 | 257 | if (cur->hdrtype == AIM_FRAMETYPE_OSCAR) { |
258 | /* command byte */ | |
259 | curPacket[0] = 0x2a; | |
e88ba395 | 260 | |
b69540e3 | 261 | /* type/family byte */ |
262 | curPacket[1] = cur->hdr.oscar.type; | |
e88ba395 | 263 | |
b69540e3 | 264 | /* bytes 3+4: word: FLAP sequence number */ |
265 | aimutil_put16(curPacket+2, cur->hdr.oscar.seqnum); | |
e88ba395 | 266 | |
b69540e3 | 267 | /* bytes 5+6: word: SNAC len */ |
268 | aimutil_put16(curPacket+4, cur->commandlen); | |
e88ba395 | 269 | |
b69540e3 | 270 | /* bytes 7 and on: raw: SNAC data */ /* XXX: ye gods! get rid of this! */ |
271 | memcpy(&(curPacket[6]), cur->data, cur->commandlen); | |
272 | ||
273 | } else if (cur->hdrtype == AIM_FRAMETYPE_OFT) { | |
274 | int z = 0; | |
275 | ||
276 | z += aimutil_put8(curPacket+z, 0x4f); | |
277 | z += aimutil_put8(curPacket+z, 0x44); | |
278 | z += aimutil_put8(curPacket+z, 0x43); | |
279 | z += aimutil_put8(curPacket+z, 0x32); | |
280 | ||
281 | z += aimutil_put16(curPacket+z, cur->hdr.oft.hdr2len + 8); | |
282 | z += aimutil_put16(curPacket+z, cur->hdr.oft.type); | |
283 | ||
284 | memcpy(curPacket+z, cur->hdr.oft.hdr2, cur->hdr.oft.hdr2len); | |
285 | } | |
286 | ||
287 | /* | |
288 | * For OSCAR, a full image of the raw packet data now in curPacket. | |
289 | * For OFT, an image of just the bloated header is in curPacket, | |
290 | * since OFT allows us to do the data in a different write (yay!). | |
291 | */ | |
e88ba395 | 292 | faim_mutex_lock(&cur->conn->active); |
5ac21963 | 293 | if (send(cur->conn->fd, curPacket, buflen, 0) != buflen) { |
e88ba395 | 294 | faim_mutex_unlock(&cur->conn->active); |
68ac63c2 | 295 | cur->sent = 1; |
296 | aim_conn_kill(sess, &cur->conn); | |
297 | return 0; /* bail out */ | |
e88ba395 | 298 | } |
b69540e3 | 299 | |
300 | if ((cur->hdrtype == AIM_FRAMETYPE_OFT) && cur->commandlen) { | |
5ac21963 | 301 | if (send(cur->conn->fd, cur->data, cur->commandlen, 0) != (int)cur->commandlen) { |
b69540e3 | 302 | /* |
303 | * Theres nothing we can do about this since we've already sent the | |
304 | * header! The connection is unstable. | |
305 | */ | |
306 | } | |
307 | } | |
308 | ||
309 | cur->sent = 1; /* mark the struct as sent */ | |
310 | cur->conn->lastactivity = time(NULL); | |
311 | ||
e88ba395 | 312 | faim_mutex_unlock(&cur->conn->active); |
313 | ||
314 | #if debug > 2 | |
315 | faimdprintf(2, "\nPacket:"); | |
316 | for (i = 0; i < (cur->commandlen + 6); i++) { | |
317 | if ((i % 8) == 0) { | |
318 | faimdprintf(2, "\n\t"); | |
319 | } | |
320 | if (curPacket[i] >= ' ' && curPacket[i]<127) { | |
321 | faimdprintf(2, "%c=%02x ", curPacket[i], curPacket[i]); | |
322 | } else { | |
323 | faimdprintf(2, "0x%2x ", curPacket[i]); | |
324 | } | |
325 | } | |
326 | faimdprintf(2, "\n"); | |
327 | #endif | |
328 | cur->lock = 0; /* unlock the struct */ | |
329 | free(curPacket); /* free up full-packet buffer */ | |
330 | ||
331 | return 1; /* success */ | |
332 | } | |
333 | ||
78b3fb13 | 334 | faim_export int aim_tx_flushqueue(struct aim_session_t *sess) |
9de3ca7e | 335 | { |
b8d0da45 | 336 | struct command_tx_struct *cur; |
e88ba395 | 337 | |
9de3ca7e | 338 | #if debug > 1 |
339 | int i = 0; | |
340 | #endif | |
341 | ||
b8d0da45 | 342 | if (sess->queue_outgoing == NULL) |
343 | return 0; | |
a25832e6 | 344 | |
b8d0da45 | 345 | faimdprintf(2, "beginning txflush...\n"); |
346 | for (cur = sess->queue_outgoing; cur; cur = cur->next) { | |
347 | /* only process if its unlocked and unsent */ | |
348 | if (!cur->lock && !cur->sent) { | |
a25832e6 | 349 | |
b8d0da45 | 350 | /* |
351 | * And now for the meager attempt to force transmit | |
352 | * latency and avoid missed messages. | |
353 | */ | |
354 | if ((cur->conn->lastactivity + cur->conn->forcedlatency) >= time(NULL)) { | |
355 | /* FIXME FIXME -- should be a break! we dont want to block the upper layers */ | |
356 | sleep((cur->conn->lastactivity + cur->conn->forcedlatency) - time(NULL)); | |
357 | } | |
a25832e6 | 358 | |
68ac63c2 | 359 | if (aim_tx_sendframe(sess, cur) == -1) |
e88ba395 | 360 | break; |
9de3ca7e | 361 | } |
b8d0da45 | 362 | } |
9de3ca7e | 363 | |
364 | /* purge sent commands from queue */ | |
a25832e6 | 365 | aim_tx_purgequeue(sess); |
9de3ca7e | 366 | |
367 | return 0; | |
368 | } | |
369 | ||
370 | /* | |
a25832e6 | 371 | * aim_tx_purgequeue() |
372 | * | |
373 | * This is responsable for removing sent commands from the transmit | |
374 | * queue. This is not a required operation, but it of course helps | |
375 | * reduce memory footprint at run time! | |
376 | * | |
9de3ca7e | 377 | */ |
78b3fb13 | 378 | faim_export void aim_tx_purgequeue(struct aim_session_t *sess) |
9de3ca7e | 379 | { |
b8d0da45 | 380 | struct command_tx_struct *cur = NULL; |
381 | struct command_tx_struct *tmp; | |
382 | ||
a25832e6 | 383 | if (sess->queue_outgoing == NULL) |
b8d0da45 | 384 | return; |
385 | ||
386 | if (sess->queue_outgoing->next == NULL) { | |
387 | if (!sess->queue_outgoing->lock && sess->queue_outgoing->sent) { | |
388 | tmp = sess->queue_outgoing; | |
389 | sess->queue_outgoing = NULL; | |
b69540e3 | 390 | if (tmp->hdrtype == AIM_FRAMETYPE_OFT) |
391 | free(tmp->hdr.oft.hdr2); | |
b8d0da45 | 392 | free(tmp->data); |
393 | free(tmp); | |
9de3ca7e | 394 | } |
b8d0da45 | 395 | return; |
396 | } | |
397 | ||
398 | for(cur = sess->queue_outgoing; cur->next != NULL; ) { | |
399 | if (!cur->next->lock && cur->next->sent) { | |
400 | tmp = cur->next; | |
401 | cur->next = tmp->next; | |
b69540e3 | 402 | if (tmp->hdrtype == AIM_FRAMETYPE_OFT) |
403 | free(tmp->hdr.oft.hdr2); | |
b8d0da45 | 404 | free(tmp->data); |
405 | free(tmp); | |
406 | } | |
407 | cur = cur->next; | |
9de3ca7e | 408 | |
b8d0da45 | 409 | /* |
410 | * Be careful here. Because of the way we just | |
411 | * manipulated the pointer, cur may be NULL and | |
412 | * the for() will segfault doing the check unless | |
413 | * we find this case first. | |
414 | */ | |
415 | if (cur == NULL) | |
416 | break; | |
417 | } | |
418 | return; | |
9de3ca7e | 419 | } |