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 | |
18f56d13 |
320 | static int tryreq(struct transfer *transfer) |
d3372da9 |
321 | { |
322 | struct fnetnode *fn; |
323 | struct fnetpeer *peer; |
18f56d13 |
324 | |
325 | if((fn = transfer->fn) != NULL) |
326 | { |
327 | if(fn->state != FNN_EST) |
328 | { |
329 | transfer->close = 1; |
330 | return(1); |
331 | } |
332 | peer = fnetfindpeer(fn, transfer->peerid); |
333 | } else { |
334 | peer = NULL; |
335 | for(fn = fnetnodes; fn != NULL; fn = fn->next) |
336 | { |
337 | if((fn->state == FNN_EST) && (fn->fnet == transfer->fnet) && ((peer = fnetfindpeer(fn, transfer->peerid)) != NULL)) |
338 | break; |
339 | } |
340 | } |
341 | if(peer != NULL) |
6329b4ba |
342 | { |
343 | time(&transfer->lastreq); |
18f56d13 |
344 | return(fn->fnet->reqconn(peer)); |
6329b4ba |
345 | } |
18f56d13 |
346 | return(1); |
347 | } |
348 | |
349 | void trytransferbypeer(struct fnet *fnet, wchar_t *peerid) |
350 | { |
351 | struct transfer *transfer; |
352 | |
353 | for(transfer = transfers; transfer != NULL; transfer = transfer->next) |
354 | { |
355 | if((transfer->dir == TRNSD_DOWN) && (transfer->state == TRNS_WAITING)) |
356 | { |
357 | if((transfer->fnet == fnet) && !wcscmp(transfer->peerid, peerid)) |
358 | { |
359 | if(!tryreq(transfer)) |
360 | return; |
361 | } |
362 | } |
363 | } |
364 | } |
365 | |
366 | void bumptransfer(struct transfer *transfer) |
367 | { |
d3372da9 |
368 | time_t now; |
369 | |
370 | if((now = time(NULL)) < transfer->timeout) |
371 | { |
18f56d13 |
372 | |
d3372da9 |
373 | if(transfer->etimer == NULL) |
374 | transfer->etimer = timercallback(transfer->timeout, (void (*)(int, void *))transexpire, transfer); |
375 | return; |
376 | } |
377 | if(transfer->etimer != NULL) |
378 | canceltimer(transfer->etimer); |
379 | switch(transfer->state) |
380 | { |
381 | case TRNS_WAITING: |
d3372da9 |
382 | transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 30), (void (*)(int, void *))transexpire, transfer); |
383 | if(now - transfer->lastreq > 30) |
18f56d13 |
384 | tryreq(transfer); |
d3372da9 |
385 | break; |
386 | case TRNS_HS: |
387 | if(transfer->dir == TRNSD_UP) |
388 | { |
389 | if(now - transfer->activity < 60) |
390 | transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 60), (void (*)(int, void *))transexpire, transfer); |
391 | else |
392 | transfer->close = 1; |
393 | } else if(transfer->dir == TRNSD_DOWN) { |
394 | if(now - transfer->activity < 60) |
395 | transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 60), (void (*)(int, void *))transexpire, transfer); |
396 | else |
397 | resettransfer(transfer); |
398 | } |
399 | break; |
400 | case TRNS_MAIN: |
401 | if(transfer->dir == TRNSD_UP) |
402 | { |
403 | if(now - transfer->activity < 300) |
404 | transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 300), (void (*)(int, void *))transexpire, transfer); |
405 | else |
406 | transfer->close = 1; |
407 | } |
408 | break; |
409 | } |
410 | } |
411 | |
412 | void transfersetactivity(struct transfer *transfer, wchar_t *desc) |
413 | { |
414 | time(&transfer->activity); |
415 | if(desc != NULL) |
416 | { |
417 | if(transfer->actdesc != NULL) |
418 | free(transfer->actdesc); |
419 | transfer->actdesc = swcsdup(desc); |
420 | } |
421 | bumptransfer(transfer); |
422 | CBCHAINDOCB(transfer, trans_act, transfer); |
423 | } |
424 | |
425 | void transfersetstate(struct transfer *transfer, int newstate) |
426 | { |
427 | transfer->state = newstate; |
428 | if(transfer->etimer != NULL) |
429 | canceltimer(transfer->etimer); |
430 | transfersetactivity(transfer, NULL); |
431 | CBCHAINDOCB(transfer, trans_ac, transfer, L"state"); |
432 | } |
433 | |
434 | void transfersetnick(struct transfer *transfer, wchar_t *newnick) |
435 | { |
436 | if(transfer->peernick != NULL) |
437 | free(transfer->peernick); |
438 | transfer->peernick = swcsdup(newnick); |
439 | CBCHAINDOCB(transfer, trans_ac, transfer, L"nick"); |
440 | } |
441 | |
442 | void transfersetsize(struct transfer *transfer, int newsize) |
443 | { |
444 | transfer->size = newsize; |
445 | CBCHAINDOCB(transfer, trans_ac, transfer, L"size"); |
446 | } |
447 | |
448 | void transferseterror(struct transfer *transfer, int error) |
449 | { |
450 | transfer->error = error; |
451 | CBCHAINDOCB(transfer, trans_ac, transfer, L"error"); |
452 | } |
453 | |
454 | void transfersetpath(struct transfer *transfer, wchar_t *path) |
455 | { |
456 | if(transfer->path != NULL) |
457 | free(transfer->path); |
458 | transfer->path = swcsdup(path); |
459 | CBCHAINDOCB(transfer, trans_ac, transfer, L"path"); |
460 | } |
461 | |
2c086721 |
462 | void transfersethash(struct transfer *transfer, struct hash *hash) |
463 | { |
464 | if(transfer->hash != NULL) |
465 | freehash(transfer->hash); |
466 | transfer->hash = hash; |
467 | CBCHAINDOCB(transfer, trans_ac, transfer, L"hash"); |
468 | } |
469 | |
d3372da9 |
470 | int slotsleft(void) |
471 | { |
472 | struct transfer *transfer; |
473 | int slots; |
474 | |
475 | slots = confgetint("transfer", "slots"); |
476 | for(transfer = transfers; (transfer != NULL) && (slots > 0); transfer = transfer->next) |
477 | { |
478 | if((transfer->dir == TRNSD_UP) && (transfer->state == TRNS_MAIN) && !transfer->flags.b.minislot) |
479 | slots--; |
480 | } |
481 | return(slots); |
482 | } |
483 | |
484 | static void killfilter(struct transfer *transfer) |
485 | { |
486 | if(transfer->filter != -1) |
487 | { |
488 | kill(-transfer->filter, SIGHUP); |
489 | transfer->filter = -1; |
490 | } |
491 | if(transfer->localend) |
492 | { |
493 | transfer->localend->readcb = NULL; |
494 | transfer->localend->writecb = NULL; |
495 | transfer->localend->errcb = NULL; |
496 | putsock(transfer->localend); |
497 | transfer->localend = NULL; |
498 | } |
499 | if(transfer->filterout) |
500 | { |
501 | transfer->filterout->readcb = NULL; |
502 | putsock(transfer->filterout); |
503 | transfer->filterout = NULL; |
504 | } |
505 | if(transfer->filterbuf) |
506 | { |
507 | free(transfer->filterbuf); |
508 | transfer->filterbuf = NULL; |
509 | } |
510 | transfer->filterbufsize = transfer->filterbufdata = 0; |
511 | } |
512 | |
513 | static char *findfilter(struct passwd *pwd) |
514 | { |
515 | char *path, *filtername; |
516 | |
517 | if((path = sprintf2("%s/.dcdl-filter", pwd->pw_dir)) != NULL) |
518 | { |
519 | if(!access(path, X_OK)) |
520 | return(path); |
521 | free(path); |
522 | } |
523 | if((filtername = icwcstombs(confgetstr("transfer", "filter"), NULL)) == NULL) |
524 | { |
525 | flog(LOG_WARNING, "could not convert filter name into local charset: %s", strerror(errno)); |
526 | } else { |
527 | if(strchr(filtername, '/') == NULL) |
528 | { |
529 | if((path = sprintf2("/etc/%s", filtername)) != NULL) |
530 | { |
531 | if(!access(path, X_OK)) |
532 | { |
533 | free(filtername); |
534 | return(path); |
535 | } |
536 | free(path); |
537 | } |
538 | if((path = sprintf2("/usr/etc/%s", filtername)) != NULL) |
539 | { |
540 | if(!access(path, X_OK)) |
541 | { |
542 | free(filtername); |
543 | return(path); |
544 | } |
545 | free(path); |
546 | } |
547 | if((path = sprintf2("/usr/local/etc/%s", filtername)) != NULL) |
548 | { |
549 | if(!access(path, X_OK)) |
550 | { |
551 | free(filtername); |
552 | return(path); |
553 | } |
554 | free(path); |
555 | } |
556 | } else { |
557 | if(!access(filtername, X_OK)) |
558 | return(filtername); |
559 | } |
560 | free(filtername); |
561 | } |
562 | return(NULL); |
563 | } |
564 | |
565 | static void filterread(struct socket *sk, struct transfer *transfer) |
566 | { |
567 | char *buf, *p, *p2; |
568 | size_t bufsize; |
569 | wchar_t *cmd, *arg; |
570 | |
571 | if((buf = sockgetinbuf(sk, &bufsize)) == NULL) |
572 | return; |
573 | bufcat(transfer->filterbuf, buf, bufsize); |
574 | free(buf); |
575 | if((p = memchr(transfer->filterbuf, '\n', transfer->filterbufdata)) != NULL) |
576 | { |
577 | *(p++) = 0; |
578 | if((p2 = strchr(transfer->filterbuf, ' ')) != NULL) |
579 | *(p2++) = 0; |
580 | if((cmd = icmbstowcs(transfer->filterbuf, NULL)) != NULL) |
581 | { |
582 | arg = NULL; |
583 | if(p2 != NULL) |
584 | { |
585 | if((arg = icmbstowcs(p2, NULL)) == NULL) |
586 | flog(LOG_WARNING, "filter sent a string which could not be converted into the local charset: %s: %s", transfer->filterbuf, strerror(errno)); |
587 | } |
588 | CBCHAINDOCB(transfer, trans_filterout, transfer, cmd, arg); |
589 | if(arg != NULL) |
590 | free(arg); |
591 | free(cmd); |
592 | } else { |
593 | flog(LOG_WARNING, "filter sent a string which could not be converted into the local charset: %s: %s", transfer->filterbuf, strerror(errno)); |
594 | } |
595 | memmove(transfer->filterbuf, p, transfer->filterbufdata -= (p - transfer->filterbuf)); |
596 | } |
597 | } |
598 | |
599 | static void filterexit(pid_t pid, int status, void *data) |
600 | { |
601 | struct transfer *transfer; |
602 | |
603 | for(transfer = transfers; transfer != NULL; transfer = transfer->next) |
604 | { |
605 | if(transfer->filter == pid) |
606 | { |
607 | transfer->filter = -1; |
608 | killfilter(transfer); |
609 | if(WEXITSTATUS(status)) |
610 | { |
611 | resettransfer(transfer); |
612 | } else { |
613 | freetransfer(transfer); |
614 | } |
a751b0d3 |
615 | trytransferbypeer(transfer->fnet, transfer->peerid); |
d3372da9 |
616 | break; |
617 | } |
618 | } |
619 | } |
620 | |
621 | int forkfilter(struct transfer *transfer) |
622 | { |
623 | char *filtername, *filename, *peerid, *buf; |
624 | wchar_t *wfilename; |
625 | struct passwd *pwent; |
626 | pid_t pid; |
627 | int inpipe, outpipe; |
628 | char **argv; |
629 | size_t argvsize, argvdata; |
630 | struct socket *insock, *outsock; |
9ec790e8 |
631 | struct wcspair *ta; |
d3372da9 |
632 | char *rec, *val; |
633 | |
634 | wfilename = transfer->path; |
635 | if(transfer->fnet->filebasename != NULL) |
636 | wfilename = transfer->fnet->filebasename(wfilename); |
637 | if(transfer->auth == NULL) |
638 | { |
639 | flog(LOG_WARNING, "tried to fork filter for transfer with NULL authhandle (tranfer %i)", transfer->id); |
640 | errno = EACCES; |
641 | return(-1); |
642 | } |
643 | if((pwent = getpwuid(transfer->owner)) == NULL) |
644 | { |
645 | flog(LOG_WARNING, "no passwd entry for uid %i (found in transfer %i)", transfer->owner, transfer->id); |
646 | errno = EACCES; |
647 | return(-1); |
648 | } |
649 | if((filtername = findfilter(pwent)) == NULL) |
650 | { |
651 | flog(LOG_WARNING, "could not find filter for user %s", pwent->pw_name); |
652 | errno = ENOENT; |
653 | return(-1); |
654 | } |
655 | if((filename = icwcstombs(wfilename, NULL)) == NULL) |
656 | { |
657 | if((buf = icwcstombs(wfilename, "UTF-8")) == NULL) |
658 | { |
659 | flog(LOG_WARNING, "could convert transfer filename to neither local charset nor UTF-8: %s", strerror(errno)); |
660 | return(-1); |
661 | } |
662 | filename = sprintf2("utf8-%s", buf); |
663 | free(buf); |
664 | } |
665 | if((peerid = icwcstombs(transfer->peerid, NULL)) == NULL) |
666 | { |
667 | if((buf = icwcstombs(transfer->peerid, "UTF-8")) == NULL) |
668 | { |
669 | flog(LOG_WARNING, "could convert transfer peerid to neither local charset nor UTF-8: %s", strerror(errno)); |
670 | free(filename); |
671 | return(-1); |
672 | } |
673 | peerid = sprintf2("utf8-%s", buf); |
674 | free(buf); |
675 | } |
676 | 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) |
677 | { |
678 | flog(LOG_WARNING, "could not fork session for filter for transfer %i: %s", transfer->id, strerror(errno)); |
679 | return(-1); |
680 | } |
681 | if(pid == 0) |
682 | { |
683 | argv = NULL; |
684 | argvsize = argvdata = 0; |
685 | buf = sprintf2("%i", transfer->size); |
686 | addtobuf(argv, filtername); |
687 | addtobuf(argv, filename); |
688 | addtobuf(argv, buf); |
689 | addtobuf(argv, peerid); |
082b0419 |
690 | if(transfer->hash) |
691 | { |
692 | if((buf = icwcstombs(unparsehash(transfer->hash), NULL)) != NULL) |
693 | { |
694 | /* XXX: I am very doubtful of this, but it can just as |
695 | * well be argued that all data should be presented as |
696 | * key-value pairs. */ |
697 | addtobuf(argv, "hash"); |
698 | addtobuf(argv, buf); |
699 | } else { |
700 | flog(LOG_WARNING, "could not convert hash to local charset"); |
701 | } |
702 | } |
d3372da9 |
703 | for(ta = transfer->args; ta != NULL; ta = ta->next) |
704 | { |
9ec790e8 |
705 | if((rec = icwcstombs(ta->key, NULL)) == NULL) |
d3372da9 |
706 | continue; |
707 | if((val = icwcstombs(ta->val, NULL)) == NULL) |
708 | continue; |
709 | addtobuf(argv, rec); |
710 | addtobuf(argv, val); |
711 | } |
712 | addtobuf(argv, NULL); |
713 | execv(filtername, argv); |
714 | flog(LOG_WARNING, "could not exec filter %s: %s", filtername, strerror(errno)); |
715 | exit(127); |
716 | } |
717 | insock = wrapsock(inpipe); |
718 | outsock = wrapsock(outpipe); |
719 | /* Really, really strange thing here - sometimes the kernel would |
720 | * return POLLIN on insock, even though it's a write-side |
721 | * pipe. The corresponding read on the pipe naturally returns |
722 | * EBADF, causing doldacond to think there's something wrong with |
723 | * the fd, and thus it closes it. Until I can find out whyever the |
724 | * kernel gives a POLLIN on the fd (if I can at all...), I'll just |
725 | * set ignread on insock for now. */ |
726 | insock->ignread = 1; |
727 | transfer->filter = pid; |
728 | transfersetlocalend(transfer, insock); |
729 | getsock(transfer->filterout = outsock); |
730 | outsock->data = transfer; |
731 | outsock->readcb = (void (*)(struct socket *, void *))filterread; |
732 | putsock(insock); |
733 | putsock(outsock); |
734 | free(filtername); |
735 | free(filename); |
736 | free(peerid); |
737 | return(0); |
738 | } |
739 | |
740 | static int run(void) |
741 | { |
742 | struct transfer *transfer, *next; |
743 | |
744 | for(transfer = transfers; transfer != NULL; transfer = transfer->next) |
745 | { |
746 | if((transfer->endpos >= 0) && (transfer->state == TRNS_MAIN) && (transfer->localend != NULL) && (transfer->localend->state == SOCK_EST) && (transfer->curpos >= transfer->endpos)) |
747 | { |
748 | if((transfer->iface != NULL) && (transfer->iface->endofdata != NULL)) |
749 | transfer->iface->endofdata(transfer, transfer->ifacedata); |
750 | closesock(transfer->localend); |
751 | } |
752 | } |
753 | for(transfer = transfers; transfer != NULL; transfer = next) |
754 | { |
755 | next = transfer->next; |
756 | if(transfer->close) |
757 | { |
758 | transferdetach(transfer); |
759 | freetransfer(transfer); |
760 | continue; |
761 | } |
762 | } |
763 | return(0); |
764 | } |
765 | |
766 | static struct configvar myvars[] = |
767 | { |
768 | {CONF_VAR_INT, "slots", {.num = 3}}, |
769 | {CONF_VAR_INT, "ultos", {.num = SOCK_TOS_MAXTP}}, |
770 | {CONF_VAR_INT, "dltos", {.num = SOCK_TOS_MAXTP}}, |
771 | {CONF_VAR_STRING, "filter", {.str = L"dc-filter"}}, |
772 | {CONF_VAR_END} |
773 | }; |
774 | |
775 | static struct module me = |
776 | { |
777 | .conf = |
778 | { |
779 | .vars = myvars |
780 | }, |
781 | .name = "transfer", |
782 | .run = run |
783 | }; |
784 | |
785 | MODULE(me); |