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 | |
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 | { |
87 | transfer->localend->readcb = NULL; |
88 | transfer->localend->writecb = NULL; |
89 | transfer->localend->errcb = NULL; |
90 | putsock(transfer->localend); |
91 | } |
92 | if(transfer->filterout != NULL) |
93 | { |
94 | transfer->filterout->readcb = NULL; |
95 | transfer->filterout->writecb = NULL; |
96 | transfer->filterout->errcb = NULL; |
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 | |
d3372da9 |
158 | struct transfer *newupload(struct fnetnode *fn, struct fnet *fnet, wchar_t *nickid, struct transferiface *iface, void *data) |
159 | { |
160 | struct transfer *transfer; |
161 | |
162 | transfer = newtransfer(); |
163 | if(fnet != NULL) |
164 | transfer->fnet = fnet; |
165 | else |
166 | transfer->fnet = fn->fnet; |
167 | transfer->peerid = swcsdup(nickid); |
168 | transfer->state = TRNS_HS; |
169 | transfer->dir = TRNSD_UP; |
170 | if(fn != NULL) |
171 | getfnetnode(transfer->fn = fn); |
172 | transferattach(transfer, iface, data); |
173 | linktransfer(transfer); |
174 | bumptransfer(transfer); |
175 | return(transfer); |
176 | } |
177 | |
178 | void linktransfer(struct transfer *transfer) |
179 | { |
180 | transfer->next = transfers; |
181 | transfer->prev = NULL; |
182 | if(transfers != NULL) |
183 | transfers->prev = transfer; |
184 | transfers = transfer; |
185 | GCBCHAINDOCB(newtransfercb, transfer); |
186 | } |
187 | |
188 | void resettransfer(struct transfer *transfer) |
189 | { |
190 | if(transfer->dir == TRNSD_DOWN) |
191 | { |
192 | if(transfer->iface != NULL) |
193 | transferdetach(transfer); |
194 | killfilter(transfer); |
195 | transfersetstate(transfer, TRNS_WAITING); |
196 | transfersetactivity(transfer, L"reset"); |
197 | return; |
198 | } |
199 | } |
200 | |
201 | struct transfer *findtransfer(int id) |
202 | { |
203 | struct transfer *transfer; |
204 | |
205 | for(transfer = transfers; transfer != NULL; transfer = transfer->next) |
206 | { |
207 | if(transfer->id == id) |
208 | break; |
209 | } |
210 | return(transfer); |
211 | } |
212 | |
213 | static void transexpire(int cancelled, struct transfer *transfer) |
214 | { |
215 | transfer->etimer = NULL; |
216 | if(!cancelled) |
217 | bumptransfer(transfer); |
218 | else |
219 | transfer->timeout = 0; |
220 | } |
221 | |
222 | static void transferread(struct socket *sk, struct transfer *transfer) |
223 | { |
224 | if(sockgetdatalen(sk) >= 65536) |
225 | sk->ignread = 1; |
226 | if((transfer->iface != NULL) && (transfer->iface->gotdata != NULL)) |
227 | transfer->iface->gotdata(transfer, transfer->ifacedata); |
228 | } |
229 | |
230 | static void transferwrite(struct socket *sk, struct transfer *transfer) |
231 | { |
232 | if((transfer->iface != NULL) && (transfer->iface->wantdata != NULL)) |
233 | transfer->iface->wantdata(transfer, transfer->ifacedata); |
234 | } |
235 | |
236 | static void transfererr(struct socket *sk, int errno, struct transfer *transfer) |
237 | { |
238 | if((transfer->iface != NULL) && (transfer->iface->endofdata != NULL)) |
239 | transfer->iface->endofdata(transfer, transfer->ifacedata); |
240 | } |
241 | |
242 | void transferputdata(struct transfer *transfer, void *buf, size_t size) |
243 | { |
244 | time(&transfer->activity); |
245 | sockqueue(transfer->localend, buf, size); |
246 | transfer->curpos += size; |
7a5e9d41 |
247 | bytesdownload += size; |
d3372da9 |
248 | CBCHAINDOCB(transfer, trans_p, transfer); |
249 | } |
250 | |
251 | void transferendofdata(struct transfer *transfer) |
252 | { |
253 | if(transfer->curpos >= transfer->size) |
254 | { |
255 | transfersetstate(transfer, TRNS_DONE); |
256 | transfer->localend->readcb = NULL; |
257 | transfer->localend->writecb = NULL; |
258 | transfer->localend->errcb = NULL; |
259 | putsock(transfer->localend); |
260 | transfer->localend = NULL; |
261 | } else { |
262 | resettransfer(transfer); |
263 | } |
264 | } |
265 | |
266 | size_t transferdatasize(struct transfer *transfer) |
267 | { |
268 | return(sockqueuesize(transfer->localend)); |
269 | } |
270 | |
271 | void *transfergetdata(struct transfer *transfer, size_t *size) |
272 | { |
273 | void *buf; |
274 | |
275 | if(transfer->localend == NULL) |
276 | return(NULL); |
277 | transfer->localend->ignread = 0; |
278 | time(&transfer->activity); |
279 | if((buf = sockgetinbuf(transfer->localend, size)) == NULL) |
280 | return(NULL); |
281 | if((transfer->endpos >= 0) && (transfer->curpos + *size >= transfer->endpos)) |
282 | { |
283 | *size = transfer->endpos - transfer->curpos; |
284 | buf = srealloc(buf, *size); |
285 | } |
286 | transfer->curpos += *size; |
7a5e9d41 |
287 | bytesupload += *size; |
d3372da9 |
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 | |
2c086721 |
301 | void transferstartdl(struct transfer *transfer, struct socket *sk) |
302 | { |
303 | transfersetstate(transfer, TRNS_MAIN); |
304 | socksettos(sk, confgetint("transfer", "dltos")); |
305 | } |
306 | |
d3372da9 |
307 | void transferstartul(struct transfer *transfer, struct socket *sk) |
308 | { |
309 | transfersetstate(transfer, TRNS_MAIN); |
310 | socksettos(sk, confgetint("transfer", "ultos")); |
311 | if(transfer->localend != NULL) |
312 | transfer->localend->ignread = 0; |
313 | } |
314 | |
315 | void transfersetlocalend(struct transfer *transfer, struct socket *sk) |
316 | { |
317 | if(transfer->localend != NULL) |
318 | putsock(transfer->localend); |
319 | getsock(transfer->localend = sk); |
320 | sk->data = transfer; |
321 | sk->readcb = (void (*)(struct socket *, void *))transferread; |
322 | sk->writecb = (void (*)(struct socket *, void *))transferwrite; |
323 | sk->errcb = (void (*)(struct socket *, int, void *))transfererr; |
324 | } |
325 | |
18f56d13 |
326 | static int tryreq(struct transfer *transfer) |
d3372da9 |
327 | { |
328 | struct fnetnode *fn; |
329 | struct fnetpeer *peer; |
18f56d13 |
330 | |
331 | if((fn = transfer->fn) != NULL) |
332 | { |
333 | if(fn->state != FNN_EST) |
334 | { |
335 | transfer->close = 1; |
336 | return(1); |
337 | } |
338 | peer = fnetfindpeer(fn, transfer->peerid); |
339 | } else { |
340 | peer = NULL; |
341 | for(fn = fnetnodes; fn != NULL; fn = fn->next) |
342 | { |
343 | if((fn->state == FNN_EST) && (fn->fnet == transfer->fnet) && ((peer = fnetfindpeer(fn, transfer->peerid)) != NULL)) |
344 | break; |
345 | } |
346 | } |
347 | if(peer != NULL) |
6329b4ba |
348 | { |
349 | time(&transfer->lastreq); |
18f56d13 |
350 | return(fn->fnet->reqconn(peer)); |
6329b4ba |
351 | } |
18f56d13 |
352 | return(1); |
353 | } |
354 | |
355 | void trytransferbypeer(struct fnet *fnet, wchar_t *peerid) |
356 | { |
357 | struct transfer *transfer; |
358 | |
359 | for(transfer = transfers; transfer != NULL; transfer = transfer->next) |
360 | { |
361 | if((transfer->dir == TRNSD_DOWN) && (transfer->state == TRNS_WAITING)) |
362 | { |
363 | if((transfer->fnet == fnet) && !wcscmp(transfer->peerid, peerid)) |
364 | { |
365 | if(!tryreq(transfer)) |
366 | return; |
367 | } |
368 | } |
369 | } |
370 | } |
371 | |
372 | void bumptransfer(struct transfer *transfer) |
373 | { |
d3372da9 |
374 | time_t now; |
375 | |
376 | if((now = time(NULL)) < transfer->timeout) |
377 | { |
18f56d13 |
378 | |
d3372da9 |
379 | if(transfer->etimer == NULL) |
380 | transfer->etimer = timercallback(transfer->timeout, (void (*)(int, void *))transexpire, transfer); |
381 | return; |
382 | } |
383 | if(transfer->etimer != NULL) |
384 | canceltimer(transfer->etimer); |
385 | switch(transfer->state) |
386 | { |
387 | case TRNS_WAITING: |
d3372da9 |
388 | transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 30), (void (*)(int, void *))transexpire, transfer); |
389 | if(now - transfer->lastreq > 30) |
18f56d13 |
390 | tryreq(transfer); |
d3372da9 |
391 | break; |
392 | case TRNS_HS: |
393 | if(transfer->dir == TRNSD_UP) |
394 | { |
395 | if(now - transfer->activity < 60) |
396 | transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 60), (void (*)(int, void *))transexpire, transfer); |
397 | else |
398 | transfer->close = 1; |
399 | } else if(transfer->dir == TRNSD_DOWN) { |
400 | if(now - transfer->activity < 60) |
401 | transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 60), (void (*)(int, void *))transexpire, transfer); |
402 | else |
403 | resettransfer(transfer); |
404 | } |
405 | break; |
406 | case TRNS_MAIN: |
407 | if(transfer->dir == TRNSD_UP) |
408 | { |
409 | if(now - transfer->activity < 300) |
410 | transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 300), (void (*)(int, void *))transexpire, transfer); |
411 | else |
412 | transfer->close = 1; |
413 | } |
414 | break; |
415 | } |
416 | } |
417 | |
418 | void transfersetactivity(struct transfer *transfer, wchar_t *desc) |
419 | { |
420 | time(&transfer->activity); |
421 | if(desc != NULL) |
422 | { |
423 | if(transfer->actdesc != NULL) |
424 | free(transfer->actdesc); |
425 | transfer->actdesc = swcsdup(desc); |
426 | } |
427 | bumptransfer(transfer); |
428 | CBCHAINDOCB(transfer, trans_act, transfer); |
429 | } |
430 | |
431 | void transfersetstate(struct transfer *transfer, int newstate) |
432 | { |
433 | transfer->state = newstate; |
434 | if(transfer->etimer != NULL) |
435 | canceltimer(transfer->etimer); |
436 | transfersetactivity(transfer, NULL); |
437 | CBCHAINDOCB(transfer, trans_ac, transfer, L"state"); |
438 | } |
439 | |
440 | void transfersetnick(struct transfer *transfer, wchar_t *newnick) |
441 | { |
442 | if(transfer->peernick != NULL) |
443 | free(transfer->peernick); |
444 | transfer->peernick = swcsdup(newnick); |
445 | CBCHAINDOCB(transfer, trans_ac, transfer, L"nick"); |
446 | } |
447 | |
448 | void transfersetsize(struct transfer *transfer, int newsize) |
449 | { |
450 | transfer->size = newsize; |
451 | CBCHAINDOCB(transfer, trans_ac, transfer, L"size"); |
452 | } |
453 | |
454 | void transferseterror(struct transfer *transfer, int error) |
455 | { |
456 | transfer->error = error; |
457 | CBCHAINDOCB(transfer, trans_ac, transfer, L"error"); |
458 | } |
459 | |
460 | void transfersetpath(struct transfer *transfer, wchar_t *path) |
461 | { |
462 | if(transfer->path != NULL) |
463 | free(transfer->path); |
464 | transfer->path = swcsdup(path); |
465 | CBCHAINDOCB(transfer, trans_ac, transfer, L"path"); |
466 | } |
467 | |
2c086721 |
468 | void transfersethash(struct transfer *transfer, struct hash *hash) |
469 | { |
470 | if(transfer->hash != NULL) |
471 | freehash(transfer->hash); |
472 | transfer->hash = hash; |
473 | CBCHAINDOCB(transfer, trans_ac, transfer, L"hash"); |
474 | } |
475 | |
d3372da9 |
476 | int slotsleft(void) |
477 | { |
478 | struct transfer *transfer; |
479 | int slots; |
480 | |
481 | slots = confgetint("transfer", "slots"); |
482 | for(transfer = transfers; (transfer != NULL) && (slots > 0); transfer = transfer->next) |
483 | { |
484 | if((transfer->dir == TRNSD_UP) && (transfer->state == TRNS_MAIN) && !transfer->flags.b.minislot) |
485 | slots--; |
486 | } |
487 | return(slots); |
488 | } |
489 | |
490 | static void killfilter(struct transfer *transfer) |
491 | { |
492 | if(transfer->filter != -1) |
493 | { |
494 | kill(-transfer->filter, SIGHUP); |
495 | transfer->filter = -1; |
496 | } |
497 | if(transfer->localend) |
498 | { |
499 | transfer->localend->readcb = NULL; |
500 | transfer->localend->writecb = NULL; |
501 | transfer->localend->errcb = NULL; |
502 | putsock(transfer->localend); |
503 | transfer->localend = NULL; |
504 | } |
505 | if(transfer->filterout) |
506 | { |
507 | transfer->filterout->readcb = NULL; |
508 | putsock(transfer->filterout); |
509 | transfer->filterout = NULL; |
510 | } |
511 | if(transfer->filterbuf) |
512 | { |
513 | free(transfer->filterbuf); |
514 | transfer->filterbuf = NULL; |
515 | } |
516 | transfer->filterbufsize = transfer->filterbufdata = 0; |
517 | } |
518 | |
519 | static char *findfilter(struct passwd *pwd) |
520 | { |
521 | char *path, *filtername; |
522 | |
523 | if((path = sprintf2("%s/.dcdl-filter", pwd->pw_dir)) != NULL) |
524 | { |
525 | if(!access(path, X_OK)) |
526 | return(path); |
527 | free(path); |
528 | } |
529 | if((filtername = icwcstombs(confgetstr("transfer", "filter"), NULL)) == NULL) |
530 | { |
531 | flog(LOG_WARNING, "could not convert filter name into local charset: %s", strerror(errno)); |
532 | } else { |
533 | if(strchr(filtername, '/') == NULL) |
534 | { |
535 | if((path = sprintf2("/etc/%s", filtername)) != NULL) |
536 | { |
537 | if(!access(path, X_OK)) |
538 | { |
539 | free(filtername); |
540 | return(path); |
541 | } |
542 | free(path); |
543 | } |
544 | if((path = sprintf2("/usr/etc/%s", filtername)) != NULL) |
545 | { |
546 | if(!access(path, X_OK)) |
547 | { |
548 | free(filtername); |
549 | return(path); |
550 | } |
551 | free(path); |
552 | } |
553 | if((path = sprintf2("/usr/local/etc/%s", filtername)) != NULL) |
554 | { |
555 | if(!access(path, X_OK)) |
556 | { |
557 | free(filtername); |
558 | return(path); |
559 | } |
560 | free(path); |
561 | } |
562 | } else { |
563 | if(!access(filtername, X_OK)) |
564 | return(filtername); |
565 | } |
566 | free(filtername); |
567 | } |
568 | return(NULL); |
569 | } |
570 | |
0309b83d |
571 | static void handletranscmd(struct transfer *transfer, wchar_t *cmd, wchar_t *arg) |
572 | { |
573 | if(!wcscmp(cmd, L"status")) { |
574 | if(arg == NULL) |
575 | arg = L""; |
576 | if(transfer->exitstatus != NULL) |
577 | free(transfer->exitstatus); |
578 | transfer->exitstatus = swcsdup(arg); |
579 | } |
580 | } |
581 | |
d3372da9 |
582 | static void filterread(struct socket *sk, struct transfer *transfer) |
583 | { |
584 | char *buf, *p, *p2; |
585 | size_t bufsize; |
586 | wchar_t *cmd, *arg; |
587 | |
588 | if((buf = sockgetinbuf(sk, &bufsize)) == NULL) |
589 | return; |
590 | bufcat(transfer->filterbuf, buf, bufsize); |
591 | free(buf); |
5b193db0 |
592 | while((p = memchr(transfer->filterbuf, '\n', transfer->filterbufdata)) != NULL) |
d3372da9 |
593 | { |
594 | *(p++) = 0; |
595 | if((p2 = strchr(transfer->filterbuf, ' ')) != NULL) |
596 | *(p2++) = 0; |
597 | if((cmd = icmbstowcs(transfer->filterbuf, NULL)) != NULL) |
598 | { |
599 | arg = NULL; |
600 | if(p2 != NULL) |
601 | { |
602 | if((arg = icmbstowcs(p2, NULL)) == NULL) |
13b303d4 |
603 | flog(LOG_WARNING, "filter sent a string which could not be converted into the local charset: %s: %s", p2, strerror(errno)); |
d3372da9 |
604 | } |
0309b83d |
605 | handletranscmd(transfer, cmd, arg); |
d3372da9 |
606 | CBCHAINDOCB(transfer, trans_filterout, transfer, cmd, arg); |
607 | if(arg != NULL) |
608 | free(arg); |
609 | free(cmd); |
610 | } else { |
611 | flog(LOG_WARNING, "filter sent a string which could not be converted into the local charset: %s: %s", transfer->filterbuf, strerror(errno)); |
612 | } |
613 | memmove(transfer->filterbuf, p, transfer->filterbufdata -= (p - transfer->filterbuf)); |
614 | } |
615 | } |
616 | |
617 | static void filterexit(pid_t pid, int status, void *data) |
618 | { |
619 | struct transfer *transfer; |
620 | |
621 | for(transfer = transfers; transfer != NULL; transfer = transfer->next) |
622 | { |
623 | if(transfer->filter == pid) |
624 | { |
625 | transfer->filter = -1; |
626 | killfilter(transfer); |
627 | if(WEXITSTATUS(status)) |
628 | { |
629 | resettransfer(transfer); |
630 | } else { |
631 | freetransfer(transfer); |
632 | } |
a751b0d3 |
633 | trytransferbypeer(transfer->fnet, transfer->peerid); |
d3372da9 |
634 | break; |
635 | } |
636 | } |
637 | } |
638 | |
639 | int forkfilter(struct transfer *transfer) |
640 | { |
641 | char *filtername, *filename, *peerid, *buf; |
642 | wchar_t *wfilename; |
643 | struct passwd *pwent; |
644 | pid_t pid; |
645 | int inpipe, outpipe; |
646 | char **argv; |
647 | size_t argvsize, argvdata; |
648 | struct socket *insock, *outsock; |
9ec790e8 |
649 | struct wcspair *ta; |
d3372da9 |
650 | char *rec, *val; |
651 | |
652 | wfilename = transfer->path; |
653 | if(transfer->fnet->filebasename != NULL) |
654 | wfilename = transfer->fnet->filebasename(wfilename); |
655 | if(transfer->auth == NULL) |
656 | { |
657 | flog(LOG_WARNING, "tried to fork filter for transfer with NULL authhandle (tranfer %i)", transfer->id); |
658 | errno = EACCES; |
659 | return(-1); |
660 | } |
661 | if((pwent = getpwuid(transfer->owner)) == NULL) |
662 | { |
663 | flog(LOG_WARNING, "no passwd entry for uid %i (found in transfer %i)", transfer->owner, transfer->id); |
664 | errno = EACCES; |
665 | return(-1); |
666 | } |
667 | if((filtername = findfilter(pwent)) == NULL) |
668 | { |
669 | flog(LOG_WARNING, "could not find filter for user %s", pwent->pw_name); |
670 | errno = ENOENT; |
671 | return(-1); |
672 | } |
673 | if((filename = icwcstombs(wfilename, NULL)) == NULL) |
674 | { |
675 | if((buf = icwcstombs(wfilename, "UTF-8")) == NULL) |
676 | { |
677 | flog(LOG_WARNING, "could convert transfer filename to neither local charset nor UTF-8: %s", strerror(errno)); |
678 | return(-1); |
679 | } |
680 | filename = sprintf2("utf8-%s", buf); |
681 | free(buf); |
682 | } |
683 | if((peerid = icwcstombs(transfer->peerid, NULL)) == NULL) |
684 | { |
685 | if((buf = icwcstombs(transfer->peerid, "UTF-8")) == NULL) |
686 | { |
687 | flog(LOG_WARNING, "could convert transfer peerid to neither local charset nor UTF-8: %s", strerror(errno)); |
688 | free(filename); |
689 | return(-1); |
690 | } |
691 | peerid = sprintf2("utf8-%s", buf); |
692 | free(buf); |
693 | } |
694 | 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) |
695 | { |
696 | flog(LOG_WARNING, "could not fork session for filter for transfer %i: %s", transfer->id, strerror(errno)); |
697 | return(-1); |
698 | } |
699 | if(pid == 0) |
700 | { |
701 | argv = NULL; |
702 | argvsize = argvdata = 0; |
703 | buf = sprintf2("%i", transfer->size); |
704 | addtobuf(argv, filtername); |
705 | addtobuf(argv, filename); |
706 | addtobuf(argv, buf); |
707 | addtobuf(argv, peerid); |
082b0419 |
708 | if(transfer->hash) |
709 | { |
710 | if((buf = icwcstombs(unparsehash(transfer->hash), NULL)) != NULL) |
711 | { |
712 | /* XXX: I am very doubtful of this, but it can just as |
713 | * well be argued that all data should be presented as |
714 | * key-value pairs. */ |
715 | addtobuf(argv, "hash"); |
716 | addtobuf(argv, buf); |
717 | } else { |
718 | flog(LOG_WARNING, "could not convert hash to local charset"); |
719 | } |
720 | } |
d3372da9 |
721 | for(ta = transfer->args; ta != NULL; ta = ta->next) |
722 | { |
9ec790e8 |
723 | if((rec = icwcstombs(ta->key, NULL)) == NULL) |
d3372da9 |
724 | continue; |
725 | if((val = icwcstombs(ta->val, NULL)) == NULL) |
726 | continue; |
727 | addtobuf(argv, rec); |
728 | addtobuf(argv, val); |
729 | } |
730 | addtobuf(argv, NULL); |
731 | execv(filtername, argv); |
732 | flog(LOG_WARNING, "could not exec filter %s: %s", filtername, strerror(errno)); |
733 | exit(127); |
734 | } |
735 | insock = wrapsock(inpipe); |
736 | outsock = wrapsock(outpipe); |
737 | /* Really, really strange thing here - sometimes the kernel would |
738 | * return POLLIN on insock, even though it's a write-side |
739 | * pipe. The corresponding read on the pipe naturally returns |
740 | * EBADF, causing doldacond to think there's something wrong with |
741 | * the fd, and thus it closes it. Until I can find out whyever the |
742 | * kernel gives a POLLIN on the fd (if I can at all...), I'll just |
743 | * set ignread on insock for now. */ |
744 | insock->ignread = 1; |
745 | transfer->filter = pid; |
746 | transfersetlocalend(transfer, insock); |
747 | getsock(transfer->filterout = outsock); |
748 | outsock->data = transfer; |
749 | outsock->readcb = (void (*)(struct socket *, void *))filterread; |
750 | putsock(insock); |
751 | putsock(outsock); |
752 | free(filtername); |
753 | free(filename); |
754 | free(peerid); |
755 | return(0); |
756 | } |
757 | |
758 | static int run(void) |
759 | { |
760 | struct transfer *transfer, *next; |
761 | |
762 | for(transfer = transfers; transfer != NULL; transfer = transfer->next) |
763 | { |
764 | if((transfer->endpos >= 0) && (transfer->state == TRNS_MAIN) && (transfer->localend != NULL) && (transfer->localend->state == SOCK_EST) && (transfer->curpos >= transfer->endpos)) |
765 | { |
766 | if((transfer->iface != NULL) && (transfer->iface->endofdata != NULL)) |
767 | transfer->iface->endofdata(transfer, transfer->ifacedata); |
768 | closesock(transfer->localend); |
769 | } |
770 | } |
771 | for(transfer = transfers; transfer != NULL; transfer = next) |
772 | { |
773 | next = transfer->next; |
774 | if(transfer->close) |
775 | { |
776 | transferdetach(transfer); |
777 | freetransfer(transfer); |
778 | continue; |
779 | } |
780 | } |
781 | return(0); |
782 | } |
783 | |
784 | static struct configvar myvars[] = |
785 | { |
786 | {CONF_VAR_INT, "slots", {.num = 3}}, |
787 | {CONF_VAR_INT, "ultos", {.num = SOCK_TOS_MAXTP}}, |
788 | {CONF_VAR_INT, "dltos", {.num = SOCK_TOS_MAXTP}}, |
789 | {CONF_VAR_STRING, "filter", {.str = L"dc-filter"}}, |
790 | {CONF_VAR_END} |
791 | }; |
792 | |
793 | static struct module me = |
794 | { |
795 | .conf = |
796 | { |
797 | .vars = myvars |
798 | }, |
799 | .name = "transfer", |
800 | .run = run |
801 | }; |
802 | |
803 | MODULE(me); |