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d3372da9 | 1 | /* |
2 | * Dolda Connect - Modular multiuser Direct Connect-style client | |
302a2600 | 3 | * Copyright (C) 2004 Fredrik Tolf <fredrik@dolda2000.com> |
d3372da9 | 4 | * |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version 2 of the License, or | |
8 | * (at your option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
18 | */ | |
19 | #include <stdlib.h> | |
20 | #include <string.h> | |
21 | #include <time.h> | |
22 | #include <unistd.h> | |
23 | #include <fcntl.h> | |
24 | #include <signal.h> | |
25 | #include <pwd.h> | |
26 | #include <grp.h> | |
27 | #include <errno.h> | |
28 | #include <sys/wait.h> | |
29 | ||
30 | #ifdef HAVE_CONFIG_H | |
31 | #include <config.h> | |
32 | #endif | |
33 | #include "log.h" | |
34 | #include "utils.h" | |
35 | #include "sysevents.h" | |
36 | #include "auth.h" | |
37 | #include "transfer.h" | |
38 | #include "module.h" | |
429d35e5 | 39 | #include "client.h" |
d3372da9 | 40 | |
41 | static void killfilter(struct transfer *transfer); | |
42 | ||
7a5e9d41 | 43 | unsigned long long bytesupload = 0; |
44 | unsigned long long bytesdownload = 0; | |
d3372da9 | 45 | struct transfer *transfers = NULL; |
46 | int numtransfers = 0; | |
47 | GCBCHAIN(newtransfercb, struct transfer *); | |
48 | ||
49 | void freetransfer(struct transfer *transfer) | |
50 | { | |
d3372da9 | 51 | if(transfer == transfers) |
52 | transfers = transfer->next; | |
53 | if(transfer->next != NULL) | |
54 | transfer->next->prev = transfer->prev; | |
55 | if(transfer->prev != NULL) | |
56 | transfer->prev->next = transfer->next; | |
57 | CBCHAINDOCB(transfer, trans_destroy, transfer); | |
58 | CBCHAINFREE(transfer, trans_ac); | |
59 | CBCHAINFREE(transfer, trans_act); | |
60 | CBCHAINFREE(transfer, trans_p); | |
61 | CBCHAINFREE(transfer, trans_destroy); | |
62 | CBCHAINFREE(transfer, trans_filterout); | |
9ec790e8 | 63 | while(transfer->args != NULL) |
64 | freewcspair(transfer->args, &transfer->args); | |
d3372da9 | 65 | if(transfer->filter != -1) |
66 | killfilter(transfer); | |
67 | if(transfer->etimer != NULL) | |
68 | canceltimer(transfer->etimer); | |
69 | if(transfer->auth != NULL) | |
70 | authputhandle(transfer->auth); | |
71 | if(transfer->peerid != NULL) | |
72 | free(transfer->peerid); | |
73 | if(transfer->peernick != NULL) | |
74 | free(transfer->peernick); | |
75 | if(transfer->path != NULL) | |
76 | free(transfer->path); | |
77 | if(transfer->actdesc != NULL) | |
78 | free(transfer->actdesc); | |
79 | if(transfer->filterbuf != NULL) | |
80 | free(transfer->filterbuf); | |
429d35e5 | 81 | if(transfer->hash != NULL) |
82 | freehash(transfer->hash); | |
0309b83d | 83 | if(transfer->exitstatus != NULL) |
84 | free(transfer->exitstatus); | |
d3372da9 | 85 | if(transfer->localend != NULL) |
86 | { | |
cab0b442 | 87 | transfer->localend->readcb = NULL; |
88 | transfer->localend->writecb = NULL; | |
89 | transfer->localend->errcb = NULL; | |
d3372da9 | 90 | putsock(transfer->localend); |
91 | } | |
92 | if(transfer->filterout != NULL) | |
93 | { | |
cab0b442 | 94 | transfer->filterout->readcb = NULL; |
95 | transfer->filterout->writecb = NULL; | |
96 | transfer->filterout->errcb = NULL; | |
d3372da9 | 97 | putsock(transfer->filterout); |
98 | } | |
99 | if(transfer->fn != NULL) | |
100 | putfnetnode(transfer->fn); | |
101 | free(transfer); | |
102 | numtransfers--; | |
103 | } | |
104 | ||
105 | struct transfer *newtransfer(void) | |
106 | { | |
107 | struct transfer *new; | |
108 | static int curid = 0; | |
109 | ||
110 | new = smalloc(sizeof(*new)); | |
111 | memset(new, 0, sizeof(*new)); | |
112 | new->id = curid++; | |
113 | new->size = -1; | |
114 | new->endpos = -1; | |
115 | new->filter = -1; | |
116 | CBCHAININIT(new, trans_ac); | |
117 | CBCHAININIT(new, trans_act); | |
118 | CBCHAININIT(new, trans_p); | |
119 | CBCHAININIT(new, trans_destroy); | |
120 | CBCHAININIT(new, trans_filterout); | |
121 | new->next = NULL; | |
122 | new->prev = NULL; | |
123 | time(&new->activity); | |
124 | numtransfers++; | |
125 | return(new); | |
126 | } | |
127 | ||
d3372da9 | 128 | void transferattach(struct transfer *transfer, struct transferiface *iface, void *data) |
129 | { | |
130 | if(transfer->iface != NULL) | |
131 | transferdetach(transfer); | |
132 | transfer->iface = iface; | |
133 | transfer->ifacedata = data; | |
134 | } | |
135 | ||
136 | void transferdetach(struct transfer *transfer) | |
137 | { | |
138 | if(transfer->iface != NULL) | |
139 | { | |
140 | transfer->iface->detach(transfer, transfer->ifacedata); | |
141 | transfer->iface = NULL; | |
142 | transfer->ifacedata = NULL; | |
143 | } | |
144 | } | |
145 | ||
2c086721 | 146 | struct transfer *finddownload(wchar_t *peerid) |
147 | { | |
148 | struct transfer *transfer; | |
149 | ||
150 | for(transfer = transfers; transfer != NULL; transfer = transfer->next) | |
151 | { | |
152 | if((transfer->dir == TRNSD_DOWN) && (transfer->iface == NULL) && !wcscmp(peerid, transfer->peerid)) | |
153 | break; | |
154 | } | |
155 | return(transfer); | |
156 | } | |
157 | ||
6c6bc9ce | 158 | struct transfer *hasupload(struct fnet *fnet, wchar_t *peerid) |
159 | { | |
160 | struct transfer *transfer; | |
161 | ||
162 | for(transfer = transfers; transfer != NULL; transfer = transfer->next) | |
163 | { | |
c458597e | 164 | if((transfer->dir == TRNSD_UP) && (transfer->fnet == fnet) && !wcscmp(transfer->peerid, peerid)) |
6c6bc9ce | 165 | break; |
166 | } | |
167 | return(transfer); | |
168 | } | |
169 | ||
d3372da9 | 170 | struct transfer *newupload(struct fnetnode *fn, struct fnet *fnet, wchar_t *nickid, struct transferiface *iface, void *data) |
171 | { | |
172 | struct transfer *transfer; | |
173 | ||
174 | transfer = newtransfer(); | |
175 | if(fnet != NULL) | |
176 | transfer->fnet = fnet; | |
177 | else | |
178 | transfer->fnet = fn->fnet; | |
179 | transfer->peerid = swcsdup(nickid); | |
180 | transfer->state = TRNS_HS; | |
181 | transfer->dir = TRNSD_UP; | |
182 | if(fn != NULL) | |
183 | getfnetnode(transfer->fn = fn); | |
184 | transferattach(transfer, iface, data); | |
185 | linktransfer(transfer); | |
186 | bumptransfer(transfer); | |
187 | return(transfer); | |
188 | } | |
189 | ||
190 | void linktransfer(struct transfer *transfer) | |
191 | { | |
192 | transfer->next = transfers; | |
193 | transfer->prev = NULL; | |
194 | if(transfers != NULL) | |
195 | transfers->prev = transfer; | |
196 | transfers = transfer; | |
197 | GCBCHAINDOCB(newtransfercb, transfer); | |
198 | } | |
199 | ||
200 | void resettransfer(struct transfer *transfer) | |
201 | { | |
202 | if(transfer->dir == TRNSD_DOWN) | |
203 | { | |
204 | if(transfer->iface != NULL) | |
205 | transferdetach(transfer); | |
206 | killfilter(transfer); | |
207 | transfersetstate(transfer, TRNS_WAITING); | |
208 | transfersetactivity(transfer, L"reset"); | |
209 | return; | |
210 | } | |
211 | } | |
212 | ||
213 | struct transfer *findtransfer(int id) | |
214 | { | |
215 | struct transfer *transfer; | |
216 | ||
217 | for(transfer = transfers; transfer != NULL; transfer = transfer->next) | |
218 | { | |
219 | if(transfer->id == id) | |
220 | break; | |
221 | } | |
222 | return(transfer); | |
223 | } | |
224 | ||
225 | static void transexpire(int cancelled, struct transfer *transfer) | |
226 | { | |
227 | transfer->etimer = NULL; | |
228 | if(!cancelled) | |
229 | bumptransfer(transfer); | |
230 | else | |
231 | transfer->timeout = 0; | |
232 | } | |
233 | ||
cab0b442 | 234 | static void transferread(struct socket *sk, struct transfer *transfer) |
d3372da9 | 235 | { |
236 | if(sockgetdatalen(sk) >= 65536) | |
237 | sk->ignread = 1; | |
238 | if((transfer->iface != NULL) && (transfer->iface->gotdata != NULL)) | |
239 | transfer->iface->gotdata(transfer, transfer->ifacedata); | |
240 | } | |
241 | ||
cab0b442 | 242 | static void transferwrite(struct socket *sk, struct transfer *transfer) |
d3372da9 | 243 | { |
244 | if((transfer->iface != NULL) && (transfer->iface->wantdata != NULL)) | |
245 | transfer->iface->wantdata(transfer, transfer->ifacedata); | |
246 | } | |
247 | ||
cab0b442 | 248 | static void transfererr(struct socket *sk, int errno, struct transfer *transfer) |
d3372da9 | 249 | { |
250 | if((transfer->iface != NULL) && (transfer->iface->endofdata != NULL)) | |
251 | transfer->iface->endofdata(transfer, transfer->ifacedata); | |
252 | } | |
253 | ||
254 | void transferputdata(struct transfer *transfer, void *buf, size_t size) | |
255 | { | |
256 | time(&transfer->activity); | |
257 | sockqueue(transfer->localend, buf, size); | |
258 | transfer->curpos += size; | |
7a5e9d41 | 259 | bytesdownload += size; |
d3372da9 | 260 | CBCHAINDOCB(transfer, trans_p, transfer); |
261 | } | |
262 | ||
263 | void transferendofdata(struct transfer *transfer) | |
264 | { | |
265 | if(transfer->curpos >= transfer->size) | |
266 | { | |
267 | transfersetstate(transfer, TRNS_DONE); | |
cab0b442 | 268 | transfer->localend->readcb = NULL; |
269 | transfer->localend->writecb = NULL; | |
270 | transfer->localend->errcb = NULL; | |
d3372da9 | 271 | putsock(transfer->localend); |
272 | transfer->localend = NULL; | |
273 | } else { | |
274 | resettransfer(transfer); | |
275 | } | |
276 | } | |
277 | ||
278 | size_t transferdatasize(struct transfer *transfer) | |
279 | { | |
280 | return(sockqueuesize(transfer->localend)); | |
281 | } | |
282 | ||
283 | void *transfergetdata(struct transfer *transfer, size_t *size) | |
284 | { | |
285 | void *buf; | |
286 | ||
287 | if(transfer->localend == NULL) | |
288 | return(NULL); | |
289 | transfer->localend->ignread = 0; | |
290 | time(&transfer->activity); | |
291 | if((buf = sockgetinbuf(transfer->localend, size)) == NULL) | |
292 | return(NULL); | |
293 | if((transfer->endpos >= 0) && (transfer->curpos + *size >= transfer->endpos)) | |
294 | { | |
e3f10dc2 FT |
295 | if((*size = transfer->endpos - transfer->curpos) == 0) { |
296 | free(buf); | |
297 | buf = NULL; | |
298 | } else { | |
299 | buf = srealloc(buf, *size); | |
300 | } | |
d3372da9 | 301 | } |
302 | transfer->curpos += *size; | |
7a5e9d41 | 303 | bytesupload += *size; |
d3372da9 | 304 | CBCHAINDOCB(transfer, trans_p, transfer); |
305 | return(buf); | |
306 | } | |
307 | ||
308 | void transferprepul(struct transfer *transfer, size_t size, size_t start, size_t end, struct socket *lesk) | |
309 | { | |
310 | transfersetsize(transfer, size); | |
311 | transfer->curpos = start; | |
312 | transfer->endpos = end; | |
313 | lesk->ignread = 1; | |
314 | transfersetlocalend(transfer, lesk); | |
315 | } | |
316 | ||
2c086721 | 317 | void transferstartdl(struct transfer *transfer, struct socket *sk) |
318 | { | |
319 | transfersetstate(transfer, TRNS_MAIN); | |
320 | socksettos(sk, confgetint("transfer", "dltos")); | |
321 | } | |
322 | ||
d3372da9 | 323 | void transferstartul(struct transfer *transfer, struct socket *sk) |
324 | { | |
325 | transfersetstate(transfer, TRNS_MAIN); | |
326 | socksettos(sk, confgetint("transfer", "ultos")); | |
327 | if(transfer->localend != NULL) | |
328 | transfer->localend->ignread = 0; | |
329 | } | |
330 | ||
331 | void transfersetlocalend(struct transfer *transfer, struct socket *sk) | |
332 | { | |
333 | if(transfer->localend != NULL) | |
334 | putsock(transfer->localend); | |
335 | getsock(transfer->localend = sk); | |
cab0b442 | 336 | sk->data = transfer; |
337 | sk->readcb = (void (*)(struct socket *, void *))transferread; | |
338 | sk->writecb = (void (*)(struct socket *, void *))transferwrite; | |
339 | sk->errcb = (void (*)(struct socket *, int, void *))transfererr; | |
d3372da9 | 340 | } |
341 | ||
18f56d13 | 342 | static int tryreq(struct transfer *transfer) |
d3372da9 | 343 | { |
344 | struct fnetnode *fn; | |
345 | struct fnetpeer *peer; | |
18f56d13 | 346 | |
347 | if((fn = transfer->fn) != NULL) | |
348 | { | |
349 | if(fn->state != FNN_EST) | |
350 | { | |
351 | transfer->close = 1; | |
352 | return(1); | |
353 | } | |
354 | peer = fnetfindpeer(fn, transfer->peerid); | |
355 | } else { | |
356 | peer = NULL; | |
357 | for(fn = fnetnodes; fn != NULL; fn = fn->next) | |
358 | { | |
359 | if((fn->state == FNN_EST) && (fn->fnet == transfer->fnet) && ((peer = fnetfindpeer(fn, transfer->peerid)) != NULL)) | |
360 | break; | |
361 | } | |
362 | } | |
363 | if(peer != NULL) | |
6329b4ba | 364 | { |
365 | time(&transfer->lastreq); | |
18f56d13 | 366 | return(fn->fnet->reqconn(peer)); |
6329b4ba | 367 | } |
18f56d13 | 368 | return(1); |
369 | } | |
370 | ||
371 | void trytransferbypeer(struct fnet *fnet, wchar_t *peerid) | |
372 | { | |
373 | struct transfer *transfer; | |
374 | ||
375 | for(transfer = transfers; transfer != NULL; transfer = transfer->next) | |
376 | { | |
377 | if((transfer->dir == TRNSD_DOWN) && (transfer->state == TRNS_WAITING)) | |
378 | { | |
379 | if((transfer->fnet == fnet) && !wcscmp(transfer->peerid, peerid)) | |
380 | { | |
381 | if(!tryreq(transfer)) | |
382 | return; | |
383 | } | |
384 | } | |
385 | } | |
386 | } | |
387 | ||
388 | void bumptransfer(struct transfer *transfer) | |
389 | { | |
d3372da9 | 390 | time_t now; |
391 | ||
392 | if((now = time(NULL)) < transfer->timeout) | |
393 | { | |
18f56d13 | 394 | |
d3372da9 | 395 | if(transfer->etimer == NULL) |
396 | transfer->etimer = timercallback(transfer->timeout, (void (*)(int, void *))transexpire, transfer); | |
397 | return; | |
398 | } | |
399 | if(transfer->etimer != NULL) | |
400 | canceltimer(transfer->etimer); | |
401 | switch(transfer->state) | |
402 | { | |
403 | case TRNS_WAITING: | |
d3372da9 | 404 | transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 30), (void (*)(int, void *))transexpire, transfer); |
405 | if(now - transfer->lastreq > 30) | |
18f56d13 | 406 | tryreq(transfer); |
d3372da9 | 407 | break; |
408 | case TRNS_HS: | |
409 | if(transfer->dir == TRNSD_UP) | |
410 | { | |
411 | if(now - transfer->activity < 60) | |
412 | transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 60), (void (*)(int, void *))transexpire, transfer); | |
413 | else | |
414 | transfer->close = 1; | |
415 | } else if(transfer->dir == TRNSD_DOWN) { | |
416 | if(now - transfer->activity < 60) | |
417 | transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 60), (void (*)(int, void *))transexpire, transfer); | |
418 | else | |
419 | resettransfer(transfer); | |
420 | } | |
421 | break; | |
422 | case TRNS_MAIN: | |
423 | if(transfer->dir == TRNSD_UP) | |
424 | { | |
425 | if(now - transfer->activity < 300) | |
426 | transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 300), (void (*)(int, void *))transexpire, transfer); | |
427 | else | |
428 | transfer->close = 1; | |
429 | } | |
430 | break; | |
431 | } | |
432 | } | |
433 | ||
434 | void transfersetactivity(struct transfer *transfer, wchar_t *desc) | |
435 | { | |
436 | time(&transfer->activity); | |
437 | if(desc != NULL) | |
438 | { | |
439 | if(transfer->actdesc != NULL) | |
440 | free(transfer->actdesc); | |
441 | transfer->actdesc = swcsdup(desc); | |
442 | } | |
443 | bumptransfer(transfer); | |
444 | CBCHAINDOCB(transfer, trans_act, transfer); | |
445 | } | |
446 | ||
447 | void transfersetstate(struct transfer *transfer, int newstate) | |
448 | { | |
449 | transfer->state = newstate; | |
450 | if(transfer->etimer != NULL) | |
451 | canceltimer(transfer->etimer); | |
452 | transfersetactivity(transfer, NULL); | |
453 | CBCHAINDOCB(transfer, trans_ac, transfer, L"state"); | |
454 | } | |
455 | ||
456 | void transfersetnick(struct transfer *transfer, wchar_t *newnick) | |
457 | { | |
458 | if(transfer->peernick != NULL) | |
459 | free(transfer->peernick); | |
460 | transfer->peernick = swcsdup(newnick); | |
461 | CBCHAINDOCB(transfer, trans_ac, transfer, L"nick"); | |
462 | } | |
463 | ||
464 | void transfersetsize(struct transfer *transfer, int newsize) | |
465 | { | |
466 | transfer->size = newsize; | |
467 | CBCHAINDOCB(transfer, trans_ac, transfer, L"size"); | |
468 | } | |
469 | ||
470 | void transferseterror(struct transfer *transfer, int error) | |
471 | { | |
472 | transfer->error = error; | |
473 | CBCHAINDOCB(transfer, trans_ac, transfer, L"error"); | |
474 | } | |
475 | ||
476 | void transfersetpath(struct transfer *transfer, wchar_t *path) | |
477 | { | |
478 | if(transfer->path != NULL) | |
479 | free(transfer->path); | |
480 | transfer->path = swcsdup(path); | |
481 | CBCHAINDOCB(transfer, trans_ac, transfer, L"path"); | |
482 | } | |
483 | ||
2c086721 | 484 | void transfersethash(struct transfer *transfer, struct hash *hash) |
485 | { | |
486 | if(transfer->hash != NULL) | |
487 | freehash(transfer->hash); | |
488 | transfer->hash = hash; | |
489 | CBCHAINDOCB(transfer, trans_ac, transfer, L"hash"); | |
490 | } | |
491 | ||
d3372da9 | 492 | int slotsleft(void) |
493 | { | |
494 | struct transfer *transfer; | |
495 | int slots; | |
496 | ||
497 | slots = confgetint("transfer", "slots"); | |
498 | for(transfer = transfers; (transfer != NULL) && (slots > 0); transfer = transfer->next) | |
499 | { | |
500 | if((transfer->dir == TRNSD_UP) && (transfer->state == TRNS_MAIN) && !transfer->flags.b.minislot) | |
501 | slots--; | |
502 | } | |
503 | return(slots); | |
504 | } | |
505 | ||
506 | static void killfilter(struct transfer *transfer) | |
507 | { | |
508 | if(transfer->filter != -1) | |
509 | { | |
510 | kill(-transfer->filter, SIGHUP); | |
511 | transfer->filter = -1; | |
512 | } | |
513 | if(transfer->localend) | |
514 | { | |
cab0b442 | 515 | transfer->localend->readcb = NULL; |
516 | transfer->localend->writecb = NULL; | |
517 | transfer->localend->errcb = NULL; | |
d3372da9 | 518 | putsock(transfer->localend); |
519 | transfer->localend = NULL; | |
520 | } | |
521 | if(transfer->filterout) | |
522 | { | |
cab0b442 | 523 | transfer->filterout->readcb = NULL; |
d3372da9 | 524 | putsock(transfer->filterout); |
525 | transfer->filterout = NULL; | |
526 | } | |
527 | if(transfer->filterbuf) | |
528 | { | |
529 | free(transfer->filterbuf); | |
530 | transfer->filterbuf = NULL; | |
531 | } | |
532 | transfer->filterbufsize = transfer->filterbufdata = 0; | |
533 | } | |
534 | ||
0309b83d | 535 | static void handletranscmd(struct transfer *transfer, wchar_t *cmd, wchar_t *arg) |
536 | { | |
537 | if(!wcscmp(cmd, L"status")) { | |
538 | if(arg == NULL) | |
539 | arg = L""; | |
540 | if(transfer->exitstatus != NULL) | |
541 | free(transfer->exitstatus); | |
542 | transfer->exitstatus = swcsdup(arg); | |
543 | } | |
544 | } | |
545 | ||
cab0b442 | 546 | static void filterread(struct socket *sk, struct transfer *transfer) |
d3372da9 | 547 | { |
548 | char *buf, *p, *p2; | |
549 | size_t bufsize; | |
550 | wchar_t *cmd, *arg; | |
551 | ||
552 | if((buf = sockgetinbuf(sk, &bufsize)) == NULL) | |
cab0b442 | 553 | return; |
d3372da9 | 554 | bufcat(transfer->filterbuf, buf, bufsize); |
555 | free(buf); | |
5b193db0 | 556 | while((p = memchr(transfer->filterbuf, '\n', transfer->filterbufdata)) != NULL) |
d3372da9 | 557 | { |
558 | *(p++) = 0; | |
559 | if((p2 = strchr(transfer->filterbuf, ' ')) != NULL) | |
560 | *(p2++) = 0; | |
561 | if((cmd = icmbstowcs(transfer->filterbuf, NULL)) != NULL) | |
562 | { | |
563 | arg = NULL; | |
564 | if(p2 != NULL) | |
565 | { | |
566 | if((arg = icmbstowcs(p2, NULL)) == NULL) | |
13b303d4 | 567 | flog(LOG_WARNING, "filter sent a string which could not be converted into the local charset: %s: %s", p2, strerror(errno)); |
d3372da9 | 568 | } |
0309b83d | 569 | handletranscmd(transfer, cmd, arg); |
d3372da9 | 570 | CBCHAINDOCB(transfer, trans_filterout, transfer, cmd, arg); |
571 | if(arg != NULL) | |
572 | free(arg); | |
573 | free(cmd); | |
574 | } else { | |
575 | flog(LOG_WARNING, "filter sent a string which could not be converted into the local charset: %s: %s", transfer->filterbuf, strerror(errno)); | |
576 | } | |
577 | memmove(transfer->filterbuf, p, transfer->filterbufdata -= (p - transfer->filterbuf)); | |
578 | } | |
579 | } | |
580 | ||
581 | static void filterexit(pid_t pid, int status, void *data) | |
582 | { | |
583 | struct transfer *transfer; | |
734dc54e | 584 | struct fnet *fnet; |
585 | wchar_t *peerid; | |
d3372da9 | 586 | |
587 | for(transfer = transfers; transfer != NULL; transfer = transfer->next) | |
588 | { | |
589 | if(transfer->filter == pid) | |
590 | { | |
591 | transfer->filter = -1; | |
592 | killfilter(transfer); | |
734dc54e | 593 | fnet = transfer->fnet; |
594 | peerid = swcsdup(transfer->peerid); | |
d3372da9 | 595 | if(WEXITSTATUS(status)) |
d3372da9 | 596 | resettransfer(transfer); |
734dc54e | 597 | else |
d3372da9 | 598 | freetransfer(transfer); |
734dc54e | 599 | trytransferbypeer(fnet, peerid); |
600 | free(peerid); | |
d3372da9 | 601 | break; |
602 | } | |
603 | } | |
604 | } | |
605 | ||
606 | int forkfilter(struct transfer *transfer) | |
607 | { | |
608 | char *filtername, *filename, *peerid, *buf; | |
609 | wchar_t *wfilename; | |
610 | struct passwd *pwent; | |
611 | pid_t pid; | |
612 | int inpipe, outpipe; | |
613 | char **argv; | |
614 | size_t argvsize, argvdata; | |
615 | struct socket *insock, *outsock; | |
9ec790e8 | 616 | struct wcspair *ta; |
d3372da9 | 617 | char *rec, *val; |
618 | ||
619 | wfilename = transfer->path; | |
620 | if(transfer->fnet->filebasename != NULL) | |
621 | wfilename = transfer->fnet->filebasename(wfilename); | |
622 | if(transfer->auth == NULL) | |
623 | { | |
624 | flog(LOG_WARNING, "tried to fork filter for transfer with NULL authhandle (tranfer %i)", transfer->id); | |
625 | errno = EACCES; | |
626 | return(-1); | |
627 | } | |
628 | if((pwent = getpwuid(transfer->owner)) == NULL) | |
629 | { | |
630 | flog(LOG_WARNING, "no passwd entry for uid %i (found in transfer %i)", transfer->owner, transfer->id); | |
631 | errno = EACCES; | |
632 | return(-1); | |
633 | } | |
645a4af7 | 634 | filtername = findfile("dc-filter", pwent->pw_dir, 0); |
81386042 | 635 | if(filtername == NULL) |
645a4af7 | 636 | filtername = findfile(icswcstombs(confgetstr("transfer", "filter"), NULL, NULL), NULL, 0); |
81386042 | 637 | if(filtername == NULL) |
d3372da9 | 638 | { |
639 | flog(LOG_WARNING, "could not find filter for user %s", pwent->pw_name); | |
640 | errno = ENOENT; | |
641 | return(-1); | |
642 | } | |
643 | if((filename = icwcstombs(wfilename, NULL)) == NULL) | |
644 | { | |
645 | if((buf = icwcstombs(wfilename, "UTF-8")) == NULL) | |
646 | { | |
647 | flog(LOG_WARNING, "could convert transfer filename to neither local charset nor UTF-8: %s", strerror(errno)); | |
648 | return(-1); | |
649 | } | |
650 | filename = sprintf2("utf8-%s", buf); | |
651 | free(buf); | |
652 | } | |
653 | if((peerid = icwcstombs(transfer->peerid, NULL)) == NULL) | |
654 | { | |
655 | if((buf = icwcstombs(transfer->peerid, "UTF-8")) == NULL) | |
656 | { | |
657 | flog(LOG_WARNING, "could convert transfer peerid to neither local charset nor UTF-8: %s", strerror(errno)); | |
658 | free(filename); | |
659 | return(-1); | |
660 | } | |
661 | peerid = sprintf2("utf8-%s", buf); | |
662 | free(buf); | |
663 | } | |
664 | if((pid = forksess(transfer->owner, transfer->auth, filterexit, NULL, FD_PIPE, 0, O_WRONLY, &inpipe, FD_PIPE, 1, O_RDONLY, &outpipe, FD_FILE, 2, O_RDWR, "/dev/null", FD_END)) < 0) | |
665 | { | |
666 | flog(LOG_WARNING, "could not fork session for filter for transfer %i: %s", transfer->id, strerror(errno)); | |
667 | return(-1); | |
668 | } | |
669 | if(pid == 0) | |
670 | { | |
671 | argv = NULL; | |
672 | argvsize = argvdata = 0; | |
529e3a4a | 673 | buf = sprintf2("%zi", transfer->size); |
d3372da9 | 674 | addtobuf(argv, filtername); |
675 | addtobuf(argv, filename); | |
676 | addtobuf(argv, buf); | |
677 | addtobuf(argv, peerid); | |
082b0419 | 678 | if(transfer->hash) |
679 | { | |
680 | if((buf = icwcstombs(unparsehash(transfer->hash), NULL)) != NULL) | |
681 | { | |
682 | /* XXX: I am very doubtful of this, but it can just as | |
683 | * well be argued that all data should be presented as | |
684 | * key-value pairs. */ | |
685 | addtobuf(argv, "hash"); | |
686 | addtobuf(argv, buf); | |
687 | } else { | |
688 | flog(LOG_WARNING, "could not convert hash to local charset"); | |
689 | } | |
690 | } | |
d3372da9 | 691 | for(ta = transfer->args; ta != NULL; ta = ta->next) |
692 | { | |
9ec790e8 | 693 | if((rec = icwcstombs(ta->key, NULL)) == NULL) |
d3372da9 | 694 | continue; |
695 | if((val = icwcstombs(ta->val, NULL)) == NULL) | |
696 | continue; | |
697 | addtobuf(argv, rec); | |
698 | addtobuf(argv, val); | |
699 | } | |
700 | addtobuf(argv, NULL); | |
701 | execv(filtername, argv); | |
702 | flog(LOG_WARNING, "could not exec filter %s: %s", filtername, strerror(errno)); | |
703 | exit(127); | |
704 | } | |
705 | insock = wrapsock(inpipe); | |
706 | outsock = wrapsock(outpipe); | |
707 | /* Really, really strange thing here - sometimes the kernel would | |
708 | * return POLLIN on insock, even though it's a write-side | |
709 | * pipe. The corresponding read on the pipe naturally returns | |
710 | * EBADF, causing doldacond to think there's something wrong with | |
711 | * the fd, and thus it closes it. Until I can find out whyever the | |
712 | * kernel gives a POLLIN on the fd (if I can at all...), I'll just | |
713 | * set ignread on insock for now. */ | |
714 | insock->ignread = 1; | |
715 | transfer->filter = pid; | |
716 | transfersetlocalend(transfer, insock); | |
717 | getsock(transfer->filterout = outsock); | |
cab0b442 | 718 | outsock->data = transfer; |
719 | outsock->readcb = (void (*)(struct socket *, void *))filterread; | |
d3372da9 | 720 | putsock(insock); |
721 | putsock(outsock); | |
722 | free(filtername); | |
723 | free(filename); | |
724 | free(peerid); | |
725 | return(0); | |
726 | } | |
727 | ||
728 | static int run(void) | |
729 | { | |
730 | struct transfer *transfer, *next; | |
731 | ||
732 | for(transfer = transfers; transfer != NULL; transfer = transfer->next) | |
733 | { | |
734 | if((transfer->endpos >= 0) && (transfer->state == TRNS_MAIN) && (transfer->localend != NULL) && (transfer->localend->state == SOCK_EST) && (transfer->curpos >= transfer->endpos)) | |
735 | { | |
736 | if((transfer->iface != NULL) && (transfer->iface->endofdata != NULL)) | |
737 | transfer->iface->endofdata(transfer, transfer->ifacedata); | |
738 | closesock(transfer->localend); | |
739 | } | |
740 | } | |
741 | for(transfer = transfers; transfer != NULL; transfer = next) | |
742 | { | |
743 | next = transfer->next; | |
744 | if(transfer->close) | |
745 | { | |
746 | transferdetach(transfer); | |
747 | freetransfer(transfer); | |
748 | continue; | |
749 | } | |
750 | } | |
751 | return(0); | |
752 | } | |
753 | ||
754 | static struct configvar myvars[] = | |
755 | { | |
d9f89ef5 | 756 | /** The maximum number of simultaneously permitted uploads. A |
757 | * common hub rule is that you will need at least as many slots as | |
758 | * the number of hubs to which you are connected. */ | |
d3372da9 | 759 | {CONF_VAR_INT, "slots", {.num = 3}}, |
d9f89ef5 | 760 | /** The TOS value to use for upload connections (see the TOS |
761 | * VALUES section). */ | |
d3372da9 | 762 | {CONF_VAR_INT, "ultos", {.num = SOCK_TOS_MAXTP}}, |
d9f89ef5 | 763 | /** The TOS value to use for download connections (see the TOS |
764 | * VALUES section). */ | |
d3372da9 | 765 | {CONF_VAR_INT, "dltos", {.num = SOCK_TOS_MAXTP}}, |
d9f89ef5 | 766 | /** The name of the filter script (see the FILES section for |
767 | * lookup information). */ | |
d3372da9 | 768 | {CONF_VAR_STRING, "filter", {.str = L"dc-filter"}}, |
d9f89ef5 | 769 | /** If true, only one upload is allowed per remote peer. This |
770 | * option is still experimental, so it is recommended to leave it | |
771 | * off. */ | |
01663fd9 | 772 | {CONF_VAR_BOOL, "ulquota", {.num = 0}}, |
d3372da9 | 773 | {CONF_VAR_END} |
774 | }; | |
775 | ||
776 | static struct module me = | |
777 | { | |
778 | .conf = | |
779 | { | |
780 | .vars = myvars | |
781 | }, | |
782 | .name = "transfer", | |
783 | .run = run | |
784 | }; | |
785 | ||
786 | MODULE(me); |