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