Commit | Line | Data |
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d3372da9 | 1 | /* |
2 | * Dolda Connect - Modular multiuser Direct Connect-style client | |
302a2600 | 3 | * Copyright (C) 2004 Fredrik Tolf <fredrik@dolda2000.com> |
d3372da9 | 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> | |
f9455250 | 29 | #include <stdint.h> |
d3372da9 | 30 | |
31 | #ifdef HAVE_CONFIG_H | |
32 | #include <config.h> | |
33 | #endif | |
34 | #include "log.h" | |
35 | #include "utils.h" | |
36 | #include "sysevents.h" | |
37 | #include "auth.h" | |
38 | #include "transfer.h" | |
39 | #include "module.h" | |
429d35e5 | 40 | #include "client.h" |
d3372da9 | 41 | |
42 | static void killfilter(struct transfer *transfer); | |
43 | ||
7a5e9d41 | 44 | unsigned long long bytesupload = 0; |
45 | unsigned long long bytesdownload = 0; | |
d3372da9 | 46 | struct transfer *transfers = NULL; |
47 | int numtransfers = 0; | |
48 | GCBCHAIN(newtransfercb, struct transfer *); | |
49 | ||
50 | void freetransfer(struct transfer *transfer) | |
51 | { | |
d3372da9 | 52 | if(transfer == transfers) |
53 | transfers = transfer->next; | |
54 | if(transfer->next != NULL) | |
55 | transfer->next->prev = transfer->prev; | |
56 | if(transfer->prev != NULL) | |
57 | transfer->prev->next = transfer->next; | |
58 | CBCHAINDOCB(transfer, trans_destroy, transfer); | |
59 | CBCHAINFREE(transfer, trans_ac); | |
60 | CBCHAINFREE(transfer, trans_act); | |
61 | CBCHAINFREE(transfer, trans_p); | |
62 | CBCHAINFREE(transfer, trans_destroy); | |
63 | CBCHAINFREE(transfer, trans_filterout); | |
9ec790e8 | 64 | while(transfer->args != NULL) |
65 | freewcspair(transfer->args, &transfer->args); | |
d3372da9 | 66 | if(transfer->filter != -1) |
67 | killfilter(transfer); | |
68 | if(transfer->etimer != NULL) | |
69 | canceltimer(transfer->etimer); | |
70 | if(transfer->auth != NULL) | |
71 | authputhandle(transfer->auth); | |
72 | if(transfer->peerid != NULL) | |
73 | free(transfer->peerid); | |
74 | if(transfer->peernick != NULL) | |
75 | free(transfer->peernick); | |
76 | if(transfer->path != NULL) | |
77 | free(transfer->path); | |
78 | if(transfer->actdesc != NULL) | |
79 | free(transfer->actdesc); | |
80 | if(transfer->filterbuf != NULL) | |
81 | free(transfer->filterbuf); | |
429d35e5 | 82 | if(transfer->hash != NULL) |
83 | freehash(transfer->hash); | |
0309b83d | 84 | if(transfer->exitstatus != NULL) |
85 | free(transfer->exitstatus); | |
d3372da9 | 86 | if(transfer->localend != NULL) |
87 | { | |
cab0b442 | 88 | transfer->localend->readcb = NULL; |
89 | transfer->localend->writecb = NULL; | |
90 | transfer->localend->errcb = NULL; | |
d3372da9 | 91 | putsock(transfer->localend); |
92 | } | |
93 | if(transfer->filterout != NULL) | |
94 | { | |
cab0b442 | 95 | transfer->filterout->readcb = NULL; |
96 | transfer->filterout->writecb = NULL; | |
97 | transfer->filterout->errcb = NULL; | |
d3372da9 | 98 | putsock(transfer->filterout); |
99 | } | |
100 | if(transfer->fn != NULL) | |
101 | putfnetnode(transfer->fn); | |
102 | free(transfer); | |
103 | numtransfers--; | |
104 | } | |
105 | ||
106 | struct transfer *newtransfer(void) | |
107 | { | |
108 | struct transfer *new; | |
109 | static int curid = 0; | |
110 | ||
111 | new = smalloc(sizeof(*new)); | |
112 | memset(new, 0, sizeof(*new)); | |
113 | new->id = curid++; | |
114 | new->size = -1; | |
115 | new->endpos = -1; | |
116 | new->filter = -1; | |
117 | CBCHAININIT(new, trans_ac); | |
118 | CBCHAININIT(new, trans_act); | |
119 | CBCHAININIT(new, trans_p); | |
120 | CBCHAININIT(new, trans_destroy); | |
121 | CBCHAININIT(new, trans_filterout); | |
122 | new->next = NULL; | |
123 | new->prev = NULL; | |
124 | time(&new->activity); | |
125 | numtransfers++; | |
126 | return(new); | |
127 | } | |
128 | ||
d3372da9 | 129 | void transferattach(struct transfer *transfer, struct transferiface *iface, void *data) |
130 | { | |
131 | if(transfer->iface != NULL) | |
132 | transferdetach(transfer); | |
133 | transfer->iface = iface; | |
134 | transfer->ifacedata = data; | |
135 | } | |
136 | ||
137 | void transferdetach(struct transfer *transfer) | |
138 | { | |
139 | if(transfer->iface != NULL) | |
140 | { | |
141 | transfer->iface->detach(transfer, transfer->ifacedata); | |
142 | transfer->iface = NULL; | |
143 | transfer->ifacedata = NULL; | |
144 | } | |
145 | } | |
146 | ||
2c086721 | 147 | struct transfer *finddownload(wchar_t *peerid) |
148 | { | |
149 | struct transfer *transfer; | |
150 | ||
151 | for(transfer = transfers; transfer != NULL; transfer = transfer->next) | |
152 | { | |
153 | if((transfer->dir == TRNSD_DOWN) && (transfer->iface == NULL) && !wcscmp(peerid, transfer->peerid)) | |
154 | break; | |
155 | } | |
156 | return(transfer); | |
157 | } | |
158 | ||
6c6bc9ce | 159 | struct transfer *hasupload(struct fnet *fnet, wchar_t *peerid) |
160 | { | |
161 | struct transfer *transfer; | |
162 | ||
163 | for(transfer = transfers; transfer != NULL; transfer = transfer->next) | |
164 | { | |
c458597e | 165 | if((transfer->dir == TRNSD_UP) && (transfer->fnet == fnet) && !wcscmp(transfer->peerid, peerid)) |
6c6bc9ce | 166 | break; |
167 | } | |
168 | return(transfer); | |
169 | } | |
170 | ||
d3372da9 | 171 | struct transfer *newupload(struct fnetnode *fn, struct fnet *fnet, wchar_t *nickid, struct transferiface *iface, void *data) |
172 | { | |
173 | struct transfer *transfer; | |
174 | ||
175 | transfer = newtransfer(); | |
176 | if(fnet != NULL) | |
177 | transfer->fnet = fnet; | |
178 | else | |
179 | transfer->fnet = fn->fnet; | |
180 | transfer->peerid = swcsdup(nickid); | |
181 | transfer->state = TRNS_HS; | |
182 | transfer->dir = TRNSD_UP; | |
183 | if(fn != NULL) | |
184 | getfnetnode(transfer->fn = fn); | |
185 | transferattach(transfer, iface, data); | |
186 | linktransfer(transfer); | |
187 | bumptransfer(transfer); | |
188 | return(transfer); | |
189 | } | |
190 | ||
191 | void linktransfer(struct transfer *transfer) | |
192 | { | |
193 | transfer->next = transfers; | |
194 | transfer->prev = NULL; | |
195 | if(transfers != NULL) | |
196 | transfers->prev = transfer; | |
197 | transfers = transfer; | |
198 | GCBCHAINDOCB(newtransfercb, transfer); | |
199 | } | |
200 | ||
201 | void resettransfer(struct transfer *transfer) | |
202 | { | |
203 | if(transfer->dir == TRNSD_DOWN) | |
204 | { | |
205 | if(transfer->iface != NULL) | |
206 | transferdetach(transfer); | |
207 | killfilter(transfer); | |
208 | transfersetstate(transfer, TRNS_WAITING); | |
209 | transfersetactivity(transfer, L"reset"); | |
210 | return; | |
211 | } | |
212 | } | |
213 | ||
214 | struct transfer *findtransfer(int id) | |
215 | { | |
216 | struct transfer *transfer; | |
217 | ||
218 | for(transfer = transfers; transfer != NULL; transfer = transfer->next) | |
219 | { | |
220 | if(transfer->id == id) | |
221 | break; | |
222 | } | |
223 | return(transfer); | |
224 | } | |
225 | ||
226 | static void transexpire(int cancelled, struct transfer *transfer) | |
227 | { | |
228 | transfer->etimer = NULL; | |
229 | if(!cancelled) | |
230 | bumptransfer(transfer); | |
231 | else | |
232 | transfer->timeout = 0; | |
233 | } | |
234 | ||
cab0b442 | 235 | static void transferread(struct socket *sk, struct transfer *transfer) |
d3372da9 | 236 | { |
237 | if(sockgetdatalen(sk) >= 65536) | |
238 | sk->ignread = 1; | |
239 | if((transfer->iface != NULL) && (transfer->iface->gotdata != NULL)) | |
240 | transfer->iface->gotdata(transfer, transfer->ifacedata); | |
241 | } | |
242 | ||
cab0b442 | 243 | static void transferwrite(struct socket *sk, struct transfer *transfer) |
d3372da9 | 244 | { |
245 | if((transfer->iface != NULL) && (transfer->iface->wantdata != NULL)) | |
246 | transfer->iface->wantdata(transfer, transfer->ifacedata); | |
247 | } | |
248 | ||
cab0b442 | 249 | static void transfererr(struct socket *sk, int errno, struct transfer *transfer) |
d3372da9 | 250 | { |
251 | if((transfer->iface != NULL) && (transfer->iface->endofdata != NULL)) | |
252 | transfer->iface->endofdata(transfer, transfer->ifacedata); | |
253 | } | |
254 | ||
255 | void transferputdata(struct transfer *transfer, void *buf, size_t size) | |
256 | { | |
257 | time(&transfer->activity); | |
258 | sockqueue(transfer->localend, buf, size); | |
259 | transfer->curpos += size; | |
7a5e9d41 | 260 | bytesdownload += size; |
d3372da9 | 261 | CBCHAINDOCB(transfer, trans_p, transfer); |
262 | } | |
263 | ||
264 | void transferendofdata(struct transfer *transfer) | |
265 | { | |
266 | if(transfer->curpos >= transfer->size) | |
267 | { | |
268 | transfersetstate(transfer, TRNS_DONE); | |
cab0b442 | 269 | transfer->localend->readcb = NULL; |
270 | transfer->localend->writecb = NULL; | |
271 | transfer->localend->errcb = NULL; | |
d3372da9 | 272 | putsock(transfer->localend); |
273 | transfer->localend = NULL; | |
274 | } else { | |
275 | resettransfer(transfer); | |
276 | } | |
277 | } | |
278 | ||
279 | size_t transferdatasize(struct transfer *transfer) | |
280 | { | |
281 | return(sockqueuesize(transfer->localend)); | |
282 | } | |
283 | ||
284 | void *transfergetdata(struct transfer *transfer, size_t *size) | |
285 | { | |
286 | void *buf; | |
287 | ||
288 | if(transfer->localend == NULL) | |
289 | return(NULL); | |
290 | transfer->localend->ignread = 0; | |
291 | time(&transfer->activity); | |
292 | if((buf = sockgetinbuf(transfer->localend, size)) == NULL) | |
293 | return(NULL); | |
294 | if((transfer->endpos >= 0) && (transfer->curpos + *size >= transfer->endpos)) | |
295 | { | |
e3f10dc2 FT |
296 | if((*size = transfer->endpos - transfer->curpos) == 0) { |
297 | free(buf); | |
298 | buf = NULL; | |
299 | } else { | |
300 | buf = srealloc(buf, *size); | |
301 | } | |
d3372da9 | 302 | } |
303 | transfer->curpos += *size; | |
7a5e9d41 | 304 | bytesupload += *size; |
d3372da9 | 305 | CBCHAINDOCB(transfer, trans_p, transfer); |
306 | return(buf); | |
307 | } | |
308 | ||
dcf7a1a2 | 309 | void transferprepul(struct transfer *transfer, off_t size, off_t start, off_t end, struct socket *lesk) |
d3372da9 | 310 | { |
311 | transfersetsize(transfer, size); | |
312 | transfer->curpos = start; | |
313 | transfer->endpos = end; | |
314 | lesk->ignread = 1; | |
315 | transfersetlocalend(transfer, lesk); | |
316 | } | |
317 | ||
2c086721 | 318 | void transferstartdl(struct transfer *transfer, struct socket *sk) |
319 | { | |
320 | transfersetstate(transfer, TRNS_MAIN); | |
321 | socksettos(sk, confgetint("transfer", "dltos")); | |
322 | } | |
323 | ||
d3372da9 | 324 | void transferstartul(struct transfer *transfer, struct socket *sk) |
325 | { | |
326 | transfersetstate(transfer, TRNS_MAIN); | |
327 | socksettos(sk, confgetint("transfer", "ultos")); | |
328 | if(transfer->localend != NULL) | |
329 | transfer->localend->ignread = 0; | |
330 | } | |
331 | ||
332 | void transfersetlocalend(struct transfer *transfer, struct socket *sk) | |
333 | { | |
334 | if(transfer->localend != NULL) | |
335 | putsock(transfer->localend); | |
336 | getsock(transfer->localend = sk); | |
cab0b442 | 337 | sk->data = transfer; |
338 | sk->readcb = (void (*)(struct socket *, void *))transferread; | |
339 | sk->writecb = (void (*)(struct socket *, void *))transferwrite; | |
340 | sk->errcb = (void (*)(struct socket *, int, void *))transfererr; | |
d3372da9 | 341 | } |
342 | ||
18f56d13 | 343 | static int tryreq(struct transfer *transfer) |
d3372da9 | 344 | { |
345 | struct fnetnode *fn; | |
346 | struct fnetpeer *peer; | |
18f56d13 | 347 | |
348 | if((fn = transfer->fn) != NULL) | |
349 | { | |
350 | if(fn->state != FNN_EST) | |
351 | { | |
352 | transfer->close = 1; | |
353 | return(1); | |
354 | } | |
355 | peer = fnetfindpeer(fn, transfer->peerid); | |
356 | } else { | |
357 | peer = NULL; | |
358 | for(fn = fnetnodes; fn != NULL; fn = fn->next) | |
359 | { | |
360 | if((fn->state == FNN_EST) && (fn->fnet == transfer->fnet) && ((peer = fnetfindpeer(fn, transfer->peerid)) != NULL)) | |
361 | break; | |
362 | } | |
363 | } | |
364 | if(peer != NULL) | |
6329b4ba | 365 | { |
366 | time(&transfer->lastreq); | |
18f56d13 | 367 | return(fn->fnet->reqconn(peer)); |
6329b4ba | 368 | } |
18f56d13 | 369 | return(1); |
370 | } | |
371 | ||
372 | void trytransferbypeer(struct fnet *fnet, wchar_t *peerid) | |
373 | { | |
374 | struct transfer *transfer; | |
375 | ||
376 | for(transfer = transfers; transfer != NULL; transfer = transfer->next) | |
377 | { | |
378 | if((transfer->dir == TRNSD_DOWN) && (transfer->state == TRNS_WAITING)) | |
379 | { | |
380 | if((transfer->fnet == fnet) && !wcscmp(transfer->peerid, peerid)) | |
381 | { | |
382 | if(!tryreq(transfer)) | |
383 | return; | |
384 | } | |
385 | } | |
386 | } | |
387 | } | |
388 | ||
389 | void bumptransfer(struct transfer *transfer) | |
390 | { | |
d3372da9 | 391 | time_t now; |
392 | ||
393 | if((now = time(NULL)) < transfer->timeout) | |
394 | { | |
18f56d13 | 395 | |
d3372da9 | 396 | if(transfer->etimer == NULL) |
397 | transfer->etimer = timercallback(transfer->timeout, (void (*)(int, void *))transexpire, transfer); | |
398 | return; | |
399 | } | |
400 | if(transfer->etimer != NULL) | |
401 | canceltimer(transfer->etimer); | |
402 | switch(transfer->state) | |
403 | { | |
404 | case TRNS_WAITING: | |
d3372da9 | 405 | transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 30), (void (*)(int, void *))transexpire, transfer); |
406 | if(now - transfer->lastreq > 30) | |
18f56d13 | 407 | tryreq(transfer); |
d3372da9 | 408 | break; |
409 | case TRNS_HS: | |
410 | if(transfer->dir == TRNSD_UP) | |
411 | { | |
412 | if(now - transfer->activity < 60) | |
413 | transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 60), (void (*)(int, void *))transexpire, transfer); | |
414 | else | |
415 | transfer->close = 1; | |
416 | } else if(transfer->dir == TRNSD_DOWN) { | |
417 | if(now - transfer->activity < 60) | |
418 | transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 60), (void (*)(int, void *))transexpire, transfer); | |
419 | else | |
420 | resettransfer(transfer); | |
421 | } | |
422 | break; | |
423 | case TRNS_MAIN: | |
424 | if(transfer->dir == TRNSD_UP) | |
425 | { | |
426 | if(now - transfer->activity < 300) | |
427 | transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 300), (void (*)(int, void *))transexpire, transfer); | |
428 | else | |
429 | transfer->close = 1; | |
430 | } | |
431 | break; | |
432 | } | |
433 | } | |
434 | ||
435 | void transfersetactivity(struct transfer *transfer, wchar_t *desc) | |
436 | { | |
437 | time(&transfer->activity); | |
438 | if(desc != NULL) | |
439 | { | |
440 | if(transfer->actdesc != NULL) | |
441 | free(transfer->actdesc); | |
442 | transfer->actdesc = swcsdup(desc); | |
443 | } | |
444 | bumptransfer(transfer); | |
445 | CBCHAINDOCB(transfer, trans_act, transfer); | |
446 | } | |
447 | ||
448 | void transfersetstate(struct transfer *transfer, int newstate) | |
449 | { | |
450 | transfer->state = newstate; | |
451 | if(transfer->etimer != NULL) | |
452 | canceltimer(transfer->etimer); | |
453 | transfersetactivity(transfer, NULL); | |
454 | CBCHAINDOCB(transfer, trans_ac, transfer, L"state"); | |
455 | } | |
456 | ||
457 | void transfersetnick(struct transfer *transfer, wchar_t *newnick) | |
458 | { | |
459 | if(transfer->peernick != NULL) | |
460 | free(transfer->peernick); | |
461 | transfer->peernick = swcsdup(newnick); | |
462 | CBCHAINDOCB(transfer, trans_ac, transfer, L"nick"); | |
463 | } | |
464 | ||
dcf7a1a2 | 465 | void transfersetsize(struct transfer *transfer, off_t newsize) |
d3372da9 | 466 | { |
467 | transfer->size = newsize; | |
468 | CBCHAINDOCB(transfer, trans_ac, transfer, L"size"); | |
469 | } | |
470 | ||
471 | void transferseterror(struct transfer *transfer, int error) | |
472 | { | |
473 | transfer->error = error; | |
474 | CBCHAINDOCB(transfer, trans_ac, transfer, L"error"); | |
475 | } | |
476 | ||
477 | void transfersetpath(struct transfer *transfer, wchar_t *path) | |
478 | { | |
479 | if(transfer->path != NULL) | |
480 | free(transfer->path); | |
481 | transfer->path = swcsdup(path); | |
482 | CBCHAINDOCB(transfer, trans_ac, transfer, L"path"); | |
483 | } | |
484 | ||
2c086721 | 485 | void transfersethash(struct transfer *transfer, struct hash *hash) |
486 | { | |
487 | if(transfer->hash != NULL) | |
488 | freehash(transfer->hash); | |
489 | transfer->hash = hash; | |
490 | CBCHAINDOCB(transfer, trans_ac, transfer, L"hash"); | |
491 | } | |
492 | ||
d3372da9 | 493 | int slotsleft(void) |
494 | { | |
495 | struct transfer *transfer; | |
496 | int slots; | |
497 | ||
498 | slots = confgetint("transfer", "slots"); | |
499 | for(transfer = transfers; (transfer != NULL) && (slots > 0); transfer = transfer->next) | |
500 | { | |
501 | if((transfer->dir == TRNSD_UP) && (transfer->state == TRNS_MAIN) && !transfer->flags.b.minislot) | |
502 | slots--; | |
503 | } | |
504 | return(slots); | |
505 | } | |
506 | ||
507 | static void killfilter(struct transfer *transfer) | |
508 | { | |
509 | if(transfer->filter != -1) | |
510 | { | |
511 | kill(-transfer->filter, SIGHUP); | |
512 | transfer->filter = -1; | |
513 | } | |
514 | if(transfer->localend) | |
515 | { | |
cab0b442 | 516 | transfer->localend->readcb = NULL; |
517 | transfer->localend->writecb = NULL; | |
518 | transfer->localend->errcb = NULL; | |
d3372da9 | 519 | putsock(transfer->localend); |
520 | transfer->localend = NULL; | |
521 | } | |
522 | if(transfer->filterout) | |
523 | { | |
cab0b442 | 524 | transfer->filterout->readcb = NULL; |
d3372da9 | 525 | putsock(transfer->filterout); |
526 | transfer->filterout = NULL; | |
527 | } | |
528 | if(transfer->filterbuf) | |
529 | { | |
530 | free(transfer->filterbuf); | |
531 | transfer->filterbuf = NULL; | |
532 | } | |
533 | transfer->filterbufsize = transfer->filterbufdata = 0; | |
534 | } | |
535 | ||
0309b83d | 536 | static void handletranscmd(struct transfer *transfer, wchar_t *cmd, wchar_t *arg) |
537 | { | |
538 | if(!wcscmp(cmd, L"status")) { | |
539 | if(arg == NULL) | |
540 | arg = L""; | |
541 | if(transfer->exitstatus != NULL) | |
542 | free(transfer->exitstatus); | |
543 | transfer->exitstatus = swcsdup(arg); | |
544 | } | |
545 | } | |
546 | ||
cab0b442 | 547 | static void filterread(struct socket *sk, struct transfer *transfer) |
d3372da9 | 548 | { |
549 | char *buf, *p, *p2; | |
550 | size_t bufsize; | |
551 | wchar_t *cmd, *arg; | |
552 | ||
553 | if((buf = sockgetinbuf(sk, &bufsize)) == NULL) | |
cab0b442 | 554 | return; |
d3372da9 | 555 | bufcat(transfer->filterbuf, buf, bufsize); |
556 | free(buf); | |
5b193db0 | 557 | while((p = memchr(transfer->filterbuf, '\n', transfer->filterbufdata)) != NULL) |
d3372da9 | 558 | { |
559 | *(p++) = 0; | |
560 | if((p2 = strchr(transfer->filterbuf, ' ')) != NULL) | |
561 | *(p2++) = 0; | |
562 | if((cmd = icmbstowcs(transfer->filterbuf, NULL)) != NULL) | |
563 | { | |
564 | arg = NULL; | |
565 | if(p2 != NULL) | |
566 | { | |
567 | if((arg = icmbstowcs(p2, NULL)) == NULL) | |
13b303d4 | 568 | flog(LOG_WARNING, "filter sent a string which could not be converted into the local charset: %s: %s", p2, strerror(errno)); |
d3372da9 | 569 | } |
0309b83d | 570 | handletranscmd(transfer, cmd, arg); |
d3372da9 | 571 | CBCHAINDOCB(transfer, trans_filterout, transfer, cmd, arg); |
572 | if(arg != NULL) | |
573 | free(arg); | |
574 | free(cmd); | |
575 | } else { | |
576 | flog(LOG_WARNING, "filter sent a string which could not be converted into the local charset: %s: %s", transfer->filterbuf, strerror(errno)); | |
577 | } | |
578 | memmove(transfer->filterbuf, p, transfer->filterbufdata -= (p - transfer->filterbuf)); | |
579 | } | |
580 | } | |
581 | ||
582 | static void filterexit(pid_t pid, int status, void *data) | |
583 | { | |
584 | struct transfer *transfer; | |
734dc54e | 585 | struct fnet *fnet; |
586 | wchar_t *peerid; | |
d3372da9 | 587 | |
588 | for(transfer = transfers; transfer != NULL; transfer = transfer->next) | |
589 | { | |
590 | if(transfer->filter == pid) | |
591 | { | |
592 | transfer->filter = -1; | |
593 | killfilter(transfer); | |
734dc54e | 594 | fnet = transfer->fnet; |
595 | peerid = swcsdup(transfer->peerid); | |
d3372da9 | 596 | if(WEXITSTATUS(status)) |
d3372da9 | 597 | resettransfer(transfer); |
734dc54e | 598 | else |
d3372da9 | 599 | freetransfer(transfer); |
734dc54e | 600 | trytransferbypeer(fnet, peerid); |
601 | free(peerid); | |
d3372da9 | 602 | break; |
603 | } | |
604 | } | |
605 | } | |
606 | ||
607 | int forkfilter(struct transfer *transfer) | |
608 | { | |
1d647d25 | 609 | char *filtername, *filename, *peerid, *buf, *p; |
d3372da9 | 610 | wchar_t *wfilename; |
611 | struct passwd *pwent; | |
612 | pid_t pid; | |
613 | int inpipe, outpipe; | |
614 | char **argv; | |
615 | size_t argvsize, argvdata; | |
616 | struct socket *insock, *outsock; | |
9ec790e8 | 617 | struct wcspair *ta; |
d3372da9 | 618 | char *rec, *val; |
619 | ||
9c161e77 | 620 | wfilename = fnfilebasename(transfer->path); |
d3372da9 | 621 | if(transfer->auth == NULL) |
622 | { | |
623 | flog(LOG_WARNING, "tried to fork filter for transfer with NULL authhandle (tranfer %i)", transfer->id); | |
624 | errno = EACCES; | |
625 | return(-1); | |
626 | } | |
627 | if((pwent = getpwuid(transfer->owner)) == NULL) | |
628 | { | |
629 | flog(LOG_WARNING, "no passwd entry for uid %i (found in transfer %i)", transfer->owner, transfer->id); | |
630 | errno = EACCES; | |
631 | return(-1); | |
632 | } | |
645a4af7 | 633 | filtername = findfile("dc-filter", pwent->pw_dir, 0); |
81386042 | 634 | if(filtername == NULL) |
645a4af7 | 635 | filtername = findfile(icswcstombs(confgetstr("transfer", "filter"), NULL, NULL), NULL, 0); |
81386042 | 636 | if(filtername == NULL) |
d3372da9 | 637 | { |
638 | flog(LOG_WARNING, "could not find filter for user %s", pwent->pw_name); | |
639 | errno = ENOENT; | |
640 | return(-1); | |
641 | } | |
642 | if((filename = icwcstombs(wfilename, NULL)) == NULL) | |
643 | { | |
644 | if((buf = icwcstombs(wfilename, "UTF-8")) == NULL) | |
645 | { | |
646 | flog(LOG_WARNING, "could convert transfer filename to neither local charset nor UTF-8: %s", strerror(errno)); | |
647 | return(-1); | |
648 | } | |
649 | filename = sprintf2("utf8-%s", buf); | |
650 | free(buf); | |
651 | } | |
652 | if((peerid = icwcstombs(transfer->peerid, NULL)) == NULL) | |
653 | { | |
654 | if((buf = icwcstombs(transfer->peerid, "UTF-8")) == NULL) | |
655 | { | |
656 | flog(LOG_WARNING, "could convert transfer peerid to neither local charset nor UTF-8: %s", strerror(errno)); | |
657 | free(filename); | |
658 | return(-1); | |
659 | } | |
660 | peerid = sprintf2("utf8-%s", buf); | |
661 | free(buf); | |
662 | } | |
1d647d25 FT |
663 | for(p = filename; *p; p++) { |
664 | if(*p == '/') | |
665 | *p = '_'; | |
666 | else if((p == filename) && (*p == '.')) | |
667 | *p = '_'; | |
668 | } | |
d3372da9 | 669 | 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) |
670 | { | |
671 | flog(LOG_WARNING, "could not fork session for filter for transfer %i: %s", transfer->id, strerror(errno)); | |
672 | return(-1); | |
673 | } | |
674 | if(pid == 0) | |
675 | { | |
676 | argv = NULL; | |
677 | argvsize = argvdata = 0; | |
dcf7a1a2 | 678 | buf = sprintf2("%ji", (intmax_t)transfer->size); |
d3372da9 | 679 | addtobuf(argv, filtername); |
680 | addtobuf(argv, filename); | |
681 | addtobuf(argv, buf); | |
682 | addtobuf(argv, peerid); | |
082b0419 | 683 | if(transfer->hash) |
684 | { | |
685 | if((buf = icwcstombs(unparsehash(transfer->hash), NULL)) != NULL) | |
686 | { | |
687 | /* XXX: I am very doubtful of this, but it can just as | |
688 | * well be argued that all data should be presented as | |
689 | * key-value pairs. */ | |
690 | addtobuf(argv, "hash"); | |
691 | addtobuf(argv, buf); | |
692 | } else { | |
693 | flog(LOG_WARNING, "could not convert hash to local charset"); | |
694 | } | |
695 | } | |
d3372da9 | 696 | for(ta = transfer->args; ta != NULL; ta = ta->next) |
697 | { | |
9ec790e8 | 698 | if((rec = icwcstombs(ta->key, NULL)) == NULL) |
d3372da9 | 699 | continue; |
700 | if((val = icwcstombs(ta->val, NULL)) == NULL) | |
701 | continue; | |
702 | addtobuf(argv, rec); | |
703 | addtobuf(argv, val); | |
704 | } | |
705 | addtobuf(argv, NULL); | |
706 | execv(filtername, argv); | |
707 | flog(LOG_WARNING, "could not exec filter %s: %s", filtername, strerror(errno)); | |
708 | exit(127); | |
709 | } | |
710 | insock = wrapsock(inpipe); | |
711 | outsock = wrapsock(outpipe); | |
712 | /* Really, really strange thing here - sometimes the kernel would | |
713 | * return POLLIN on insock, even though it's a write-side | |
714 | * pipe. The corresponding read on the pipe naturally returns | |
715 | * EBADF, causing doldacond to think there's something wrong with | |
716 | * the fd, and thus it closes it. Until I can find out whyever the | |
717 | * kernel gives a POLLIN on the fd (if I can at all...), I'll just | |
718 | * set ignread on insock for now. */ | |
719 | insock->ignread = 1; | |
720 | transfer->filter = pid; | |
721 | transfersetlocalend(transfer, insock); | |
722 | getsock(transfer->filterout = outsock); | |
cab0b442 | 723 | outsock->data = transfer; |
724 | outsock->readcb = (void (*)(struct socket *, void *))filterread; | |
d3372da9 | 725 | putsock(insock); |
726 | putsock(outsock); | |
727 | free(filtername); | |
728 | free(filename); | |
729 | free(peerid); | |
730 | return(0); | |
731 | } | |
732 | ||
733 | static int run(void) | |
734 | { | |
735 | struct transfer *transfer, *next; | |
736 | ||
737 | for(transfer = transfers; transfer != NULL; transfer = transfer->next) | |
738 | { | |
739 | if((transfer->endpos >= 0) && (transfer->state == TRNS_MAIN) && (transfer->localend != NULL) && (transfer->localend->state == SOCK_EST) && (transfer->curpos >= transfer->endpos)) | |
740 | { | |
741 | if((transfer->iface != NULL) && (transfer->iface->endofdata != NULL)) | |
742 | transfer->iface->endofdata(transfer, transfer->ifacedata); | |
743 | closesock(transfer->localend); | |
744 | } | |
745 | } | |
746 | for(transfer = transfers; transfer != NULL; transfer = next) | |
747 | { | |
748 | next = transfer->next; | |
749 | if(transfer->close) | |
750 | { | |
751 | transferdetach(transfer); | |
752 | freetransfer(transfer); | |
753 | continue; | |
754 | } | |
755 | } | |
756 | return(0); | |
757 | } | |
758 | ||
759 | static struct configvar myvars[] = | |
760 | { | |
d9f89ef5 | 761 | /** The maximum number of simultaneously permitted uploads. A |
762 | * common hub rule is that you will need at least as many slots as | |
763 | * the number of hubs to which you are connected. */ | |
d3372da9 | 764 | {CONF_VAR_INT, "slots", {.num = 3}}, |
d9f89ef5 | 765 | /** The TOS value to use for upload connections (see the TOS |
766 | * VALUES section). */ | |
d3372da9 | 767 | {CONF_VAR_INT, "ultos", {.num = SOCK_TOS_MAXTP}}, |
d9f89ef5 | 768 | /** The TOS value to use for download connections (see the TOS |
769 | * VALUES section). */ | |
d3372da9 | 770 | {CONF_VAR_INT, "dltos", {.num = SOCK_TOS_MAXTP}}, |
d9f89ef5 | 771 | /** The name of the filter script (see the FILES section for |
772 | * lookup information). */ | |
d3372da9 | 773 | {CONF_VAR_STRING, "filter", {.str = L"dc-filter"}}, |
d9f89ef5 | 774 | /** If true, only one upload is allowed per remote peer. This |
775 | * option is still experimental, so it is recommended to leave it | |
776 | * off. */ | |
01663fd9 | 777 | {CONF_VAR_BOOL, "ulquota", {.num = 0}}, |
d3372da9 | 778 | {CONF_VAR_END} |
779 | }; | |
780 | ||
781 | static struct module me = | |
782 | { | |
783 | .conf = | |
784 | { | |
785 | .vars = myvars | |
786 | }, | |
787 | .name = "transfer", | |
788 | .run = run | |
789 | }; | |
790 | ||
791 | MODULE(me); |