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