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 | { |
49 | struct transarg *ta; |
50 | |
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); |
63 | while((ta = transfer->args) != NULL) |
64 | { |
65 | transfer->args = ta->next; |
66 | free(ta->rec); |
67 | free(ta->val); |
68 | free(ta); |
69 | } |
70 | if(transfer->filter != -1) |
71 | killfilter(transfer); |
72 | if(transfer->etimer != NULL) |
73 | canceltimer(transfer->etimer); |
74 | if(transfer->auth != NULL) |
75 | authputhandle(transfer->auth); |
76 | if(transfer->peerid != NULL) |
77 | free(transfer->peerid); |
78 | if(transfer->peernick != NULL) |
79 | free(transfer->peernick); |
80 | if(transfer->path != NULL) |
81 | free(transfer->path); |
82 | if(transfer->actdesc != NULL) |
83 | free(transfer->actdesc); |
84 | if(transfer->filterbuf != NULL) |
85 | free(transfer->filterbuf); |
429d35e5 |
86 | if(transfer->hash != NULL) |
87 | freehash(transfer->hash); |
d3372da9 |
88 | if(transfer->localend != NULL) |
89 | { |
90 | transfer->localend->readcb = NULL; |
91 | transfer->localend->writecb = NULL; |
92 | transfer->localend->errcb = NULL; |
93 | putsock(transfer->localend); |
94 | } |
95 | if(transfer->filterout != NULL) |
96 | { |
97 | transfer->filterout->readcb = NULL; |
98 | transfer->filterout->writecb = NULL; |
99 | transfer->filterout->errcb = NULL; |
100 | putsock(transfer->filterout); |
101 | } |
102 | if(transfer->fn != NULL) |
103 | putfnetnode(transfer->fn); |
104 | free(transfer); |
105 | numtransfers--; |
106 | } |
107 | |
108 | struct transfer *newtransfer(void) |
109 | { |
110 | struct transfer *new; |
111 | static int curid = 0; |
112 | |
113 | new = smalloc(sizeof(*new)); |
114 | memset(new, 0, sizeof(*new)); |
115 | new->id = curid++; |
116 | new->size = -1; |
117 | new->endpos = -1; |
118 | new->filter = -1; |
119 | CBCHAININIT(new, trans_ac); |
120 | CBCHAININIT(new, trans_act); |
121 | CBCHAININIT(new, trans_p); |
122 | CBCHAININIT(new, trans_destroy); |
123 | CBCHAININIT(new, trans_filterout); |
124 | new->next = NULL; |
125 | new->prev = NULL; |
126 | time(&new->activity); |
127 | numtransfers++; |
128 | return(new); |
129 | } |
130 | |
131 | void transferaddarg(struct transfer *transfer, wchar_t *rec, wchar_t *val) |
132 | { |
133 | struct transarg *ta; |
134 | |
135 | ta = smalloc(sizeof(*ta)); |
136 | ta->rec = swcsdup(rec); |
137 | ta->val = swcsdup(val); |
138 | ta->next = transfer->args; |
139 | transfer->args = ta; |
140 | } |
141 | |
142 | void transferattach(struct transfer *transfer, struct transferiface *iface, void *data) |
143 | { |
144 | if(transfer->iface != NULL) |
145 | transferdetach(transfer); |
146 | transfer->iface = iface; |
147 | transfer->ifacedata = data; |
148 | } |
149 | |
150 | void transferdetach(struct transfer *transfer) |
151 | { |
152 | if(transfer->iface != NULL) |
153 | { |
154 | transfer->iface->detach(transfer, transfer->ifacedata); |
155 | transfer->iface = NULL; |
156 | transfer->ifacedata = NULL; |
157 | } |
158 | } |
159 | |
160 | struct transfer *newupload(struct fnetnode *fn, struct fnet *fnet, wchar_t *nickid, struct transferiface *iface, void *data) |
161 | { |
162 | struct transfer *transfer; |
163 | |
164 | transfer = newtransfer(); |
165 | if(fnet != NULL) |
166 | transfer->fnet = fnet; |
167 | else |
168 | transfer->fnet = fn->fnet; |
169 | transfer->peerid = swcsdup(nickid); |
170 | transfer->state = TRNS_HS; |
171 | transfer->dir = TRNSD_UP; |
172 | if(fn != NULL) |
173 | getfnetnode(transfer->fn = fn); |
174 | transferattach(transfer, iface, data); |
175 | linktransfer(transfer); |
176 | bumptransfer(transfer); |
177 | return(transfer); |
178 | } |
179 | |
180 | void linktransfer(struct transfer *transfer) |
181 | { |
182 | transfer->next = transfers; |
183 | transfer->prev = NULL; |
184 | if(transfers != NULL) |
185 | transfers->prev = transfer; |
186 | transfers = transfer; |
187 | GCBCHAINDOCB(newtransfercb, transfer); |
188 | } |
189 | |
190 | void resettransfer(struct transfer *transfer) |
191 | { |
192 | if(transfer->dir == TRNSD_DOWN) |
193 | { |
194 | if(transfer->iface != NULL) |
195 | transferdetach(transfer); |
196 | killfilter(transfer); |
197 | transfersetstate(transfer, TRNS_WAITING); |
198 | transfersetactivity(transfer, L"reset"); |
199 | return; |
200 | } |
201 | } |
202 | |
203 | struct transfer *findtransfer(int id) |
204 | { |
205 | struct transfer *transfer; |
206 | |
207 | for(transfer = transfers; transfer != NULL; transfer = transfer->next) |
208 | { |
209 | if(transfer->id == id) |
210 | break; |
211 | } |
212 | return(transfer); |
213 | } |
214 | |
215 | static void transexpire(int cancelled, struct transfer *transfer) |
216 | { |
217 | transfer->etimer = NULL; |
218 | if(!cancelled) |
219 | bumptransfer(transfer); |
220 | else |
221 | transfer->timeout = 0; |
222 | } |
223 | |
224 | static void transferread(struct socket *sk, struct transfer *transfer) |
225 | { |
226 | if(sockgetdatalen(sk) >= 65536) |
227 | sk->ignread = 1; |
228 | if((transfer->iface != NULL) && (transfer->iface->gotdata != NULL)) |
229 | transfer->iface->gotdata(transfer, transfer->ifacedata); |
230 | } |
231 | |
232 | static void transferwrite(struct socket *sk, struct transfer *transfer) |
233 | { |
234 | if((transfer->iface != NULL) && (transfer->iface->wantdata != NULL)) |
235 | transfer->iface->wantdata(transfer, transfer->ifacedata); |
236 | } |
237 | |
238 | static void transfererr(struct socket *sk, int errno, struct transfer *transfer) |
239 | { |
240 | if((transfer->iface != NULL) && (transfer->iface->endofdata != NULL)) |
241 | transfer->iface->endofdata(transfer, transfer->ifacedata); |
242 | } |
243 | |
244 | void transferputdata(struct transfer *transfer, void *buf, size_t size) |
245 | { |
246 | time(&transfer->activity); |
247 | sockqueue(transfer->localend, buf, size); |
248 | transfer->curpos += size; |
249 | CBCHAINDOCB(transfer, trans_p, transfer); |
250 | } |
251 | |
252 | void transferendofdata(struct transfer *transfer) |
253 | { |
254 | if(transfer->curpos >= transfer->size) |
255 | { |
256 | transfersetstate(transfer, TRNS_DONE); |
257 | transfer->localend->readcb = NULL; |
258 | transfer->localend->writecb = NULL; |
259 | transfer->localend->errcb = NULL; |
260 | putsock(transfer->localend); |
261 | transfer->localend = NULL; |
262 | } else { |
263 | resettransfer(transfer); |
264 | } |
265 | } |
266 | |
267 | size_t transferdatasize(struct transfer *transfer) |
268 | { |
269 | return(sockqueuesize(transfer->localend)); |
270 | } |
271 | |
272 | void *transfergetdata(struct transfer *transfer, size_t *size) |
273 | { |
274 | void *buf; |
275 | |
276 | if(transfer->localend == NULL) |
277 | return(NULL); |
278 | transfer->localend->ignread = 0; |
279 | time(&transfer->activity); |
280 | if((buf = sockgetinbuf(transfer->localend, size)) == NULL) |
281 | return(NULL); |
282 | if((transfer->endpos >= 0) && (transfer->curpos + *size >= transfer->endpos)) |
283 | { |
284 | *size = transfer->endpos - transfer->curpos; |
285 | buf = srealloc(buf, *size); |
286 | } |
287 | transfer->curpos += *size; |
288 | CBCHAINDOCB(transfer, trans_p, transfer); |
289 | return(buf); |
290 | } |
291 | |
292 | void transferprepul(struct transfer *transfer, size_t size, size_t start, size_t end, struct socket *lesk) |
293 | { |
294 | transfersetsize(transfer, size); |
295 | transfer->curpos = start; |
296 | transfer->endpos = end; |
297 | lesk->ignread = 1; |
298 | transfersetlocalend(transfer, lesk); |
299 | } |
300 | |
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 | |
440 | int slotsleft(void) |
441 | { |
442 | struct transfer *transfer; |
443 | int slots; |
444 | |
445 | slots = confgetint("transfer", "slots"); |
446 | for(transfer = transfers; (transfer != NULL) && (slots > 0); transfer = transfer->next) |
447 | { |
448 | if((transfer->dir == TRNSD_UP) && (transfer->state == TRNS_MAIN) && !transfer->flags.b.minislot) |
449 | slots--; |
450 | } |
451 | return(slots); |
452 | } |
453 | |
454 | static void killfilter(struct transfer *transfer) |
455 | { |
456 | if(transfer->filter != -1) |
457 | { |
458 | kill(-transfer->filter, SIGHUP); |
459 | transfer->filter = -1; |
460 | } |
461 | if(transfer->localend) |
462 | { |
463 | transfer->localend->readcb = NULL; |
464 | transfer->localend->writecb = NULL; |
465 | transfer->localend->errcb = NULL; |
466 | putsock(transfer->localend); |
467 | transfer->localend = NULL; |
468 | } |
469 | if(transfer->filterout) |
470 | { |
471 | transfer->filterout->readcb = NULL; |
472 | putsock(transfer->filterout); |
473 | transfer->filterout = NULL; |
474 | } |
475 | if(transfer->filterbuf) |
476 | { |
477 | free(transfer->filterbuf); |
478 | transfer->filterbuf = NULL; |
479 | } |
480 | transfer->filterbufsize = transfer->filterbufdata = 0; |
481 | } |
482 | |
483 | static char *findfilter(struct passwd *pwd) |
484 | { |
485 | char *path, *filtername; |
486 | |
487 | if((path = sprintf2("%s/.dcdl-filter", pwd->pw_dir)) != NULL) |
488 | { |
489 | if(!access(path, X_OK)) |
490 | return(path); |
491 | free(path); |
492 | } |
493 | if((filtername = icwcstombs(confgetstr("transfer", "filter"), NULL)) == NULL) |
494 | { |
495 | flog(LOG_WARNING, "could not convert filter name into local charset: %s", strerror(errno)); |
496 | } else { |
497 | if(strchr(filtername, '/') == NULL) |
498 | { |
499 | if((path = sprintf2("/etc/%s", filtername)) != NULL) |
500 | { |
501 | if(!access(path, X_OK)) |
502 | { |
503 | free(filtername); |
504 | return(path); |
505 | } |
506 | free(path); |
507 | } |
508 | if((path = sprintf2("/usr/etc/%s", filtername)) != NULL) |
509 | { |
510 | if(!access(path, X_OK)) |
511 | { |
512 | free(filtername); |
513 | return(path); |
514 | } |
515 | free(path); |
516 | } |
517 | if((path = sprintf2("/usr/local/etc/%s", filtername)) != NULL) |
518 | { |
519 | if(!access(path, X_OK)) |
520 | { |
521 | free(filtername); |
522 | return(path); |
523 | } |
524 | free(path); |
525 | } |
526 | } else { |
527 | if(!access(filtername, X_OK)) |
528 | return(filtername); |
529 | } |
530 | free(filtername); |
531 | } |
532 | return(NULL); |
533 | } |
534 | |
535 | static void filterread(struct socket *sk, struct transfer *transfer) |
536 | { |
537 | char *buf, *p, *p2; |
538 | size_t bufsize; |
539 | wchar_t *cmd, *arg; |
540 | |
541 | if((buf = sockgetinbuf(sk, &bufsize)) == NULL) |
542 | return; |
543 | bufcat(transfer->filterbuf, buf, bufsize); |
544 | free(buf); |
545 | if((p = memchr(transfer->filterbuf, '\n', transfer->filterbufdata)) != NULL) |
546 | { |
547 | *(p++) = 0; |
548 | if((p2 = strchr(transfer->filterbuf, ' ')) != NULL) |
549 | *(p2++) = 0; |
550 | if((cmd = icmbstowcs(transfer->filterbuf, NULL)) != NULL) |
551 | { |
552 | arg = NULL; |
553 | if(p2 != NULL) |
554 | { |
555 | if((arg = icmbstowcs(p2, NULL)) == NULL) |
556 | flog(LOG_WARNING, "filter sent a string which could not be converted into the local charset: %s: %s", transfer->filterbuf, strerror(errno)); |
557 | } |
558 | CBCHAINDOCB(transfer, trans_filterout, transfer, cmd, arg); |
559 | if(arg != NULL) |
560 | free(arg); |
561 | free(cmd); |
562 | } else { |
563 | flog(LOG_WARNING, "filter sent a string which could not be converted into the local charset: %s: %s", transfer->filterbuf, strerror(errno)); |
564 | } |
565 | memmove(transfer->filterbuf, p, transfer->filterbufdata -= (p - transfer->filterbuf)); |
566 | } |
567 | } |
568 | |
569 | static void filterexit(pid_t pid, int status, void *data) |
570 | { |
571 | struct transfer *transfer; |
572 | |
573 | for(transfer = transfers; transfer != NULL; transfer = transfer->next) |
574 | { |
575 | if(transfer->filter == pid) |
576 | { |
577 | transfer->filter = -1; |
578 | killfilter(transfer); |
579 | if(WEXITSTATUS(status)) |
580 | { |
581 | resettransfer(transfer); |
582 | } else { |
583 | freetransfer(transfer); |
584 | } |
585 | break; |
586 | } |
587 | } |
588 | } |
589 | |
590 | int forkfilter(struct transfer *transfer) |
591 | { |
592 | char *filtername, *filename, *peerid, *buf; |
593 | wchar_t *wfilename; |
594 | struct passwd *pwent; |
595 | pid_t pid; |
596 | int inpipe, outpipe; |
597 | char **argv; |
598 | size_t argvsize, argvdata; |
599 | struct socket *insock, *outsock; |
600 | struct transarg *ta; |
601 | char *rec, *val; |
602 | |
603 | wfilename = transfer->path; |
604 | if(transfer->fnet->filebasename != NULL) |
605 | wfilename = transfer->fnet->filebasename(wfilename); |
606 | if(transfer->auth == NULL) |
607 | { |
608 | flog(LOG_WARNING, "tried to fork filter for transfer with NULL authhandle (tranfer %i)", transfer->id); |
609 | errno = EACCES; |
610 | return(-1); |
611 | } |
612 | if((pwent = getpwuid(transfer->owner)) == NULL) |
613 | { |
614 | flog(LOG_WARNING, "no passwd entry for uid %i (found in transfer %i)", transfer->owner, transfer->id); |
615 | errno = EACCES; |
616 | return(-1); |
617 | } |
618 | if((filtername = findfilter(pwent)) == NULL) |
619 | { |
620 | flog(LOG_WARNING, "could not find filter for user %s", pwent->pw_name); |
621 | errno = ENOENT; |
622 | return(-1); |
623 | } |
624 | if((filename = icwcstombs(wfilename, NULL)) == NULL) |
625 | { |
626 | if((buf = icwcstombs(wfilename, "UTF-8")) == NULL) |
627 | { |
628 | flog(LOG_WARNING, "could convert transfer filename to neither local charset nor UTF-8: %s", strerror(errno)); |
629 | return(-1); |
630 | } |
631 | filename = sprintf2("utf8-%s", buf); |
632 | free(buf); |
633 | } |
634 | if((peerid = icwcstombs(transfer->peerid, NULL)) == NULL) |
635 | { |
636 | if((buf = icwcstombs(transfer->peerid, "UTF-8")) == NULL) |
637 | { |
638 | flog(LOG_WARNING, "could convert transfer peerid to neither local charset nor UTF-8: %s", strerror(errno)); |
639 | free(filename); |
640 | return(-1); |
641 | } |
642 | peerid = sprintf2("utf8-%s", buf); |
643 | free(buf); |
644 | } |
645 | 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) |
646 | { |
647 | flog(LOG_WARNING, "could not fork session for filter for transfer %i: %s", transfer->id, strerror(errno)); |
648 | return(-1); |
649 | } |
650 | if(pid == 0) |
651 | { |
652 | argv = NULL; |
653 | argvsize = argvdata = 0; |
654 | buf = sprintf2("%i", transfer->size); |
655 | addtobuf(argv, filtername); |
656 | addtobuf(argv, filename); |
657 | addtobuf(argv, buf); |
658 | addtobuf(argv, peerid); |
659 | for(ta = transfer->args; ta != NULL; ta = ta->next) |
660 | { |
661 | if((rec = icwcstombs(ta->rec, NULL)) == NULL) |
662 | continue; |
663 | if((val = icwcstombs(ta->val, NULL)) == NULL) |
664 | continue; |
665 | addtobuf(argv, rec); |
666 | addtobuf(argv, val); |
667 | } |
668 | addtobuf(argv, NULL); |
669 | execv(filtername, argv); |
670 | flog(LOG_WARNING, "could not exec filter %s: %s", filtername, strerror(errno)); |
671 | exit(127); |
672 | } |
673 | insock = wrapsock(inpipe); |
674 | outsock = wrapsock(outpipe); |
675 | /* Really, really strange thing here - sometimes the kernel would |
676 | * return POLLIN on insock, even though it's a write-side |
677 | * pipe. The corresponding read on the pipe naturally returns |
678 | * EBADF, causing doldacond to think there's something wrong with |
679 | * the fd, and thus it closes it. Until I can find out whyever the |
680 | * kernel gives a POLLIN on the fd (if I can at all...), I'll just |
681 | * set ignread on insock for now. */ |
682 | insock->ignread = 1; |
683 | transfer->filter = pid; |
684 | transfersetlocalend(transfer, insock); |
685 | getsock(transfer->filterout = outsock); |
686 | outsock->data = transfer; |
687 | outsock->readcb = (void (*)(struct socket *, void *))filterread; |
688 | putsock(insock); |
689 | putsock(outsock); |
690 | free(filtername); |
691 | free(filename); |
692 | free(peerid); |
693 | return(0); |
694 | } |
695 | |
696 | static int run(void) |
697 | { |
698 | struct transfer *transfer, *next; |
699 | |
700 | for(transfer = transfers; transfer != NULL; transfer = transfer->next) |
701 | { |
702 | if((transfer->endpos >= 0) && (transfer->state == TRNS_MAIN) && (transfer->localend != NULL) && (transfer->localend->state == SOCK_EST) && (transfer->curpos >= transfer->endpos)) |
703 | { |
704 | if((transfer->iface != NULL) && (transfer->iface->endofdata != NULL)) |
705 | transfer->iface->endofdata(transfer, transfer->ifacedata); |
706 | closesock(transfer->localend); |
707 | } |
708 | } |
709 | for(transfer = transfers; transfer != NULL; transfer = next) |
710 | { |
711 | next = transfer->next; |
712 | if(transfer->close) |
713 | { |
714 | transferdetach(transfer); |
715 | freetransfer(transfer); |
716 | continue; |
717 | } |
718 | } |
719 | return(0); |
720 | } |
721 | |
722 | static struct configvar myvars[] = |
723 | { |
724 | {CONF_VAR_INT, "slots", {.num = 3}}, |
725 | {CONF_VAR_INT, "ultos", {.num = SOCK_TOS_MAXTP}}, |
726 | {CONF_VAR_INT, "dltos", {.num = SOCK_TOS_MAXTP}}, |
727 | {CONF_VAR_STRING, "filter", {.str = L"dc-filter"}}, |
728 | {CONF_VAR_END} |
729 | }; |
730 | |
731 | static struct module me = |
732 | { |
733 | .conf = |
734 | { |
735 | .vars = myvars |
736 | }, |
737 | .name = "transfer", |
738 | .run = run |
739 | }; |
740 | |
741 | MODULE(me); |