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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 | ||
705b7486 | 129 | void transferattach(struct transfer *transfer, struct socket *dpipe) |
d3372da9 | 130 | { |
705b7486 FT |
131 | transferdetach(transfer); |
132 | getsock(transfer->datapipe = dpipe); | |
d3372da9 | 133 | } |
134 | ||
135 | void transferdetach(struct transfer *transfer) | |
136 | { | |
705b7486 FT |
137 | if(transfer->datapipe != NULL) { |
138 | closesock(transfer->datapipe); | |
139 | putsock(transfer->datapipe); | |
d3372da9 | 140 | } |
705b7486 | 141 | transfer->datapipe = NULL; |
d3372da9 | 142 | } |
143 | ||
2c086721 | 144 | struct transfer *finddownload(wchar_t *peerid) |
145 | { | |
146 | struct transfer *transfer; | |
147 | ||
148 | for(transfer = transfers; transfer != NULL; transfer = transfer->next) | |
149 | { | |
705b7486 | 150 | if((transfer->dir == TRNSD_DOWN) && (transfer->datapipe == NULL) && !wcscmp(peerid, transfer->peerid)) |
2c086721 | 151 | break; |
152 | } | |
153 | return(transfer); | |
154 | } | |
155 | ||
6c6bc9ce | 156 | struct transfer *hasupload(struct fnet *fnet, wchar_t *peerid) |
157 | { | |
158 | struct transfer *transfer; | |
159 | ||
160 | for(transfer = transfers; transfer != NULL; transfer = transfer->next) | |
161 | { | |
c458597e | 162 | if((transfer->dir == TRNSD_UP) && (transfer->fnet == fnet) && !wcscmp(transfer->peerid, peerid)) |
6c6bc9ce | 163 | break; |
164 | } | |
165 | return(transfer); | |
166 | } | |
167 | ||
705b7486 | 168 | struct transfer *newupload(struct fnetnode *fn, struct fnet *fnet, wchar_t *nickid, struct socket *dpipe) |
d3372da9 | 169 | { |
170 | struct transfer *transfer; | |
171 | ||
172 | transfer = newtransfer(); | |
173 | if(fnet != NULL) | |
174 | transfer->fnet = fnet; | |
175 | else | |
176 | transfer->fnet = fn->fnet; | |
177 | transfer->peerid = swcsdup(nickid); | |
178 | transfer->state = TRNS_HS; | |
179 | transfer->dir = TRNSD_UP; | |
180 | if(fn != NULL) | |
181 | getfnetnode(transfer->fn = fn); | |
705b7486 | 182 | transferattach(transfer, dpipe); |
d3372da9 | 183 | linktransfer(transfer); |
184 | bumptransfer(transfer); | |
185 | return(transfer); | |
186 | } | |
187 | ||
188 | void linktransfer(struct transfer *transfer) | |
189 | { | |
190 | transfer->next = transfers; | |
191 | transfer->prev = NULL; | |
192 | if(transfers != NULL) | |
193 | transfers->prev = transfer; | |
194 | transfers = transfer; | |
195 | GCBCHAINDOCB(newtransfercb, transfer); | |
196 | } | |
197 | ||
198 | void resettransfer(struct transfer *transfer) | |
199 | { | |
200 | if(transfer->dir == TRNSD_DOWN) | |
201 | { | |
705b7486 | 202 | transferdetach(transfer); |
d3372da9 | 203 | killfilter(transfer); |
204 | transfersetstate(transfer, TRNS_WAITING); | |
205 | transfersetactivity(transfer, L"reset"); | |
206 | return; | |
207 | } | |
208 | } | |
209 | ||
210 | struct transfer *findtransfer(int id) | |
211 | { | |
212 | struct transfer *transfer; | |
213 | ||
214 | for(transfer = transfers; transfer != NULL; transfer = transfer->next) | |
215 | { | |
216 | if(transfer->id == id) | |
217 | break; | |
218 | } | |
219 | return(transfer); | |
220 | } | |
221 | ||
222 | static void transexpire(int cancelled, struct transfer *transfer) | |
223 | { | |
224 | transfer->etimer = NULL; | |
225 | if(!cancelled) | |
226 | bumptransfer(transfer); | |
227 | else | |
228 | transfer->timeout = 0; | |
229 | } | |
230 | ||
705b7486 | 231 | static void localread(struct socket *sk, struct transfer *transfer) |
d3372da9 | 232 | { |
705b7486 FT |
233 | void *buf; |
234 | size_t blen; | |
235 | ||
236 | if(transfer->datapipe != NULL) { | |
237 | buf = sockgetinbuf(sk, &blen); | |
238 | sockqueue(transfer->datapipe, buf, blen); | |
239 | if(sockqueuesize(transfer->datapipe) >= 65536) | |
240 | sockblock(sk, 1); | |
241 | else | |
242 | sockblock(sk, 0); | |
243 | } else { | |
244 | if(sockgetdatalen(sk) >= 65536) | |
245 | sockblock(sk, 1); | |
246 | } | |
d3372da9 | 247 | } |
248 | ||
705b7486 | 249 | static void localwrite(struct socket *sk, struct transfer *transfer) |
d3372da9 | 250 | { |
705b7486 FT |
251 | void *buf; |
252 | size_t blen; | |
253 | ||
254 | ||
d3372da9 | 255 | } |
256 | ||
705b7486 | 257 | static void localerr(struct socket *sk, int errno, struct transfer *transfer) |
d3372da9 | 258 | { |
259 | if((transfer->iface != NULL) && (transfer->iface->endofdata != NULL)) | |
260 | transfer->iface->endofdata(transfer, transfer->ifacedata); | |
261 | } | |
262 | ||
263 | void transferputdata(struct transfer *transfer, void *buf, size_t size) | |
264 | { | |
265 | time(&transfer->activity); | |
266 | sockqueue(transfer->localend, buf, size); | |
267 | transfer->curpos += size; | |
7a5e9d41 | 268 | bytesdownload += size; |
d3372da9 | 269 | CBCHAINDOCB(transfer, trans_p, transfer); |
270 | } | |
271 | ||
272 | void transferendofdata(struct transfer *transfer) | |
273 | { | |
274 | if(transfer->curpos >= transfer->size) | |
275 | { | |
276 | transfersetstate(transfer, TRNS_DONE); | |
cab0b442 | 277 | transfer->localend->readcb = NULL; |
278 | transfer->localend->writecb = NULL; | |
279 | transfer->localend->errcb = NULL; | |
d3372da9 | 280 | putsock(transfer->localend); |
281 | transfer->localend = NULL; | |
282 | } else { | |
283 | resettransfer(transfer); | |
284 | } | |
285 | } | |
286 | ||
2e123451 | 287 | ssize_t transferdatasize(struct transfer *transfer) |
d3372da9 | 288 | { |
81286a22 | 289 | return(sockqueueleft(transfer->localend)); |
d3372da9 | 290 | } |
291 | ||
292 | void *transfergetdata(struct transfer *transfer, size_t *size) | |
293 | { | |
294 | void *buf; | |
295 | ||
296 | if(transfer->localend == NULL) | |
297 | return(NULL); | |
d3372da9 | 298 | time(&transfer->activity); |
299 | if((buf = sockgetinbuf(transfer->localend, size)) == NULL) | |
300 | return(NULL); | |
301 | if((transfer->endpos >= 0) && (transfer->curpos + *size >= transfer->endpos)) | |
302 | { | |
e3f10dc2 FT |
303 | if((*size = transfer->endpos - transfer->curpos) == 0) { |
304 | free(buf); | |
305 | buf = NULL; | |
306 | } else { | |
307 | buf = srealloc(buf, *size); | |
308 | } | |
d3372da9 | 309 | } |
310 | transfer->curpos += *size; | |
7a5e9d41 | 311 | bytesupload += *size; |
d3372da9 | 312 | CBCHAINDOCB(transfer, trans_p, transfer); |
313 | return(buf); | |
314 | } | |
315 | ||
dcf7a1a2 | 316 | void transferprepul(struct transfer *transfer, off_t size, off_t start, off_t end, struct socket *lesk) |
d3372da9 | 317 | { |
318 | transfersetsize(transfer, size); | |
319 | transfer->curpos = start; | |
320 | transfer->endpos = end; | |
d3372da9 | 321 | transfersetlocalend(transfer, lesk); |
322 | } | |
323 | ||
2c086721 | 324 | void transferstartdl(struct transfer *transfer, struct socket *sk) |
325 | { | |
326 | transfersetstate(transfer, TRNS_MAIN); | |
327 | socksettos(sk, confgetint("transfer", "dltos")); | |
328 | } | |
329 | ||
d3372da9 | 330 | void transferstartul(struct transfer *transfer, struct socket *sk) |
331 | { | |
332 | transfersetstate(transfer, TRNS_MAIN); | |
333 | socksettos(sk, confgetint("transfer", "ultos")); | |
334 | if(transfer->localend != NULL) | |
81286a22 | 335 | transferread(transfer->localend, transfer); |
d3372da9 | 336 | } |
337 | ||
338 | void transfersetlocalend(struct transfer *transfer, struct socket *sk) | |
339 | { | |
340 | if(transfer->localend != NULL) | |
341 | putsock(transfer->localend); | |
342 | getsock(transfer->localend = sk); | |
cab0b442 | 343 | sk->data = transfer; |
705b7486 FT |
344 | sk->readcb = (void (*)(struct socket *, void *))localread; |
345 | sk->writecb = (void (*)(struct socket *, void *))localwrite; | |
346 | sk->errcb = (void (*)(struct socket *, int, void *))localerr; | |
d3372da9 | 347 | } |
348 | ||
18f56d13 | 349 | static int tryreq(struct transfer *transfer) |
d3372da9 | 350 | { |
351 | struct fnetnode *fn; | |
352 | struct fnetpeer *peer; | |
18f56d13 | 353 | |
354 | if((fn = transfer->fn) != NULL) | |
355 | { | |
356 | if(fn->state != FNN_EST) | |
357 | { | |
358 | transfer->close = 1; | |
359 | return(1); | |
360 | } | |
361 | peer = fnetfindpeer(fn, transfer->peerid); | |
362 | } else { | |
363 | peer = NULL; | |
364 | for(fn = fnetnodes; fn != NULL; fn = fn->next) | |
365 | { | |
366 | if((fn->state == FNN_EST) && (fn->fnet == transfer->fnet) && ((peer = fnetfindpeer(fn, transfer->peerid)) != NULL)) | |
367 | break; | |
368 | } | |
369 | } | |
370 | if(peer != NULL) | |
6329b4ba | 371 | { |
372 | time(&transfer->lastreq); | |
18f56d13 | 373 | return(fn->fnet->reqconn(peer)); |
6329b4ba | 374 | } |
18f56d13 | 375 | return(1); |
376 | } | |
377 | ||
378 | void trytransferbypeer(struct fnet *fnet, wchar_t *peerid) | |
379 | { | |
380 | struct transfer *transfer; | |
381 | ||
382 | for(transfer = transfers; transfer != NULL; transfer = transfer->next) | |
383 | { | |
384 | if((transfer->dir == TRNSD_DOWN) && (transfer->state == TRNS_WAITING)) | |
385 | { | |
386 | if((transfer->fnet == fnet) && !wcscmp(transfer->peerid, peerid)) | |
387 | { | |
388 | if(!tryreq(transfer)) | |
389 | return; | |
390 | } | |
391 | } | |
392 | } | |
393 | } | |
394 | ||
395 | void bumptransfer(struct transfer *transfer) | |
396 | { | |
d3372da9 | 397 | time_t now; |
398 | ||
399 | if((now = time(NULL)) < transfer->timeout) | |
400 | { | |
18f56d13 | 401 | |
d3372da9 | 402 | if(transfer->etimer == NULL) |
403 | transfer->etimer = timercallback(transfer->timeout, (void (*)(int, void *))transexpire, transfer); | |
404 | return; | |
405 | } | |
406 | if(transfer->etimer != NULL) | |
407 | canceltimer(transfer->etimer); | |
408 | switch(transfer->state) | |
409 | { | |
410 | case TRNS_WAITING: | |
d3372da9 | 411 | transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 30), (void (*)(int, void *))transexpire, transfer); |
412 | if(now - transfer->lastreq > 30) | |
18f56d13 | 413 | tryreq(transfer); |
d3372da9 | 414 | break; |
415 | case TRNS_HS: | |
416 | if(transfer->dir == TRNSD_UP) | |
417 | { | |
418 | if(now - transfer->activity < 60) | |
419 | transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 60), (void (*)(int, void *))transexpire, transfer); | |
420 | else | |
421 | transfer->close = 1; | |
422 | } else if(transfer->dir == TRNSD_DOWN) { | |
423 | if(now - transfer->activity < 60) | |
424 | transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 60), (void (*)(int, void *))transexpire, transfer); | |
425 | else | |
426 | resettransfer(transfer); | |
427 | } | |
428 | break; | |
429 | case TRNS_MAIN: | |
430 | if(transfer->dir == TRNSD_UP) | |
431 | { | |
432 | if(now - transfer->activity < 300) | |
433 | transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 300), (void (*)(int, void *))transexpire, transfer); | |
434 | else | |
435 | transfer->close = 1; | |
436 | } | |
437 | break; | |
438 | } | |
439 | } | |
440 | ||
441 | void transfersetactivity(struct transfer *transfer, wchar_t *desc) | |
442 | { | |
443 | time(&transfer->activity); | |
444 | if(desc != NULL) | |
445 | { | |
446 | if(transfer->actdesc != NULL) | |
447 | free(transfer->actdesc); | |
448 | transfer->actdesc = swcsdup(desc); | |
449 | } | |
450 | bumptransfer(transfer); | |
451 | CBCHAINDOCB(transfer, trans_act, transfer); | |
452 | } | |
453 | ||
454 | void transfersetstate(struct transfer *transfer, int newstate) | |
455 | { | |
456 | transfer->state = newstate; | |
457 | if(transfer->etimer != NULL) | |
458 | canceltimer(transfer->etimer); | |
459 | transfersetactivity(transfer, NULL); | |
460 | CBCHAINDOCB(transfer, trans_ac, transfer, L"state"); | |
461 | } | |
462 | ||
463 | void transfersetnick(struct transfer *transfer, wchar_t *newnick) | |
464 | { | |
465 | if(transfer->peernick != NULL) | |
466 | free(transfer->peernick); | |
467 | transfer->peernick = swcsdup(newnick); | |
468 | CBCHAINDOCB(transfer, trans_ac, transfer, L"nick"); | |
469 | } | |
470 | ||
dcf7a1a2 | 471 | void transfersetsize(struct transfer *transfer, off_t newsize) |
d3372da9 | 472 | { |
473 | transfer->size = newsize; | |
474 | CBCHAINDOCB(transfer, trans_ac, transfer, L"size"); | |
475 | } | |
476 | ||
477 | void transferseterror(struct transfer *transfer, int error) | |
478 | { | |
479 | transfer->error = error; | |
480 | CBCHAINDOCB(transfer, trans_ac, transfer, L"error"); | |
481 | } | |
482 | ||
483 | void transfersetpath(struct transfer *transfer, wchar_t *path) | |
484 | { | |
485 | if(transfer->path != NULL) | |
486 | free(transfer->path); | |
487 | transfer->path = swcsdup(path); | |
488 | CBCHAINDOCB(transfer, trans_ac, transfer, L"path"); | |
489 | } | |
490 | ||
2c086721 | 491 | void transfersethash(struct transfer *transfer, struct hash *hash) |
492 | { | |
493 | if(transfer->hash != NULL) | |
494 | freehash(transfer->hash); | |
495 | transfer->hash = hash; | |
496 | CBCHAINDOCB(transfer, trans_ac, transfer, L"hash"); | |
497 | } | |
498 | ||
d3372da9 | 499 | int slotsleft(void) |
500 | { | |
501 | struct transfer *transfer; | |
502 | int slots; | |
503 | ||
504 | slots = confgetint("transfer", "slots"); | |
505 | for(transfer = transfers; (transfer != NULL) && (slots > 0); transfer = transfer->next) | |
506 | { | |
507 | if((transfer->dir == TRNSD_UP) && (transfer->state == TRNS_MAIN) && !transfer->flags.b.minislot) | |
508 | slots--; | |
509 | } | |
510 | return(slots); | |
511 | } | |
512 | ||
513 | static void killfilter(struct transfer *transfer) | |
514 | { | |
515 | if(transfer->filter != -1) | |
516 | { | |
517 | kill(-transfer->filter, SIGHUP); | |
518 | transfer->filter = -1; | |
519 | } | |
520 | if(transfer->localend) | |
521 | { | |
cab0b442 | 522 | transfer->localend->readcb = NULL; |
523 | transfer->localend->writecb = NULL; | |
524 | transfer->localend->errcb = NULL; | |
d3372da9 | 525 | putsock(transfer->localend); |
526 | transfer->localend = NULL; | |
527 | } | |
528 | if(transfer->filterout) | |
529 | { | |
cab0b442 | 530 | transfer->filterout->readcb = NULL; |
d3372da9 | 531 | putsock(transfer->filterout); |
532 | transfer->filterout = NULL; | |
533 | } | |
534 | if(transfer->filterbuf) | |
535 | { | |
536 | free(transfer->filterbuf); | |
537 | transfer->filterbuf = NULL; | |
538 | } | |
539 | transfer->filterbufsize = transfer->filterbufdata = 0; | |
540 | } | |
541 | ||
0309b83d | 542 | static void handletranscmd(struct transfer *transfer, wchar_t *cmd, wchar_t *arg) |
543 | { | |
544 | if(!wcscmp(cmd, L"status")) { | |
545 | if(arg == NULL) | |
546 | arg = L""; | |
547 | if(transfer->exitstatus != NULL) | |
548 | free(transfer->exitstatus); | |
549 | transfer->exitstatus = swcsdup(arg); | |
550 | } | |
551 | } | |
552 | ||
cab0b442 | 553 | static void filterread(struct socket *sk, struct transfer *transfer) |
d3372da9 | 554 | { |
555 | char *buf, *p, *p2; | |
556 | size_t bufsize; | |
557 | wchar_t *cmd, *arg; | |
558 | ||
559 | if((buf = sockgetinbuf(sk, &bufsize)) == NULL) | |
cab0b442 | 560 | return; |
d3372da9 | 561 | bufcat(transfer->filterbuf, buf, bufsize); |
562 | free(buf); | |
5b193db0 | 563 | while((p = memchr(transfer->filterbuf, '\n', transfer->filterbufdata)) != NULL) |
d3372da9 | 564 | { |
565 | *(p++) = 0; | |
566 | if((p2 = strchr(transfer->filterbuf, ' ')) != NULL) | |
567 | *(p2++) = 0; | |
568 | if((cmd = icmbstowcs(transfer->filterbuf, NULL)) != NULL) | |
569 | { | |
570 | arg = NULL; | |
571 | if(p2 != NULL) | |
572 | { | |
573 | if((arg = icmbstowcs(p2, NULL)) == NULL) | |
13b303d4 | 574 | flog(LOG_WARNING, "filter sent a string which could not be converted into the local charset: %s: %s", p2, strerror(errno)); |
d3372da9 | 575 | } |
0309b83d | 576 | handletranscmd(transfer, cmd, arg); |
d3372da9 | 577 | CBCHAINDOCB(transfer, trans_filterout, transfer, cmd, arg); |
578 | if(arg != NULL) | |
579 | free(arg); | |
580 | free(cmd); | |
581 | } else { | |
582 | flog(LOG_WARNING, "filter sent a string which could not be converted into the local charset: %s: %s", transfer->filterbuf, strerror(errno)); | |
583 | } | |
584 | memmove(transfer->filterbuf, p, transfer->filterbufdata -= (p - transfer->filterbuf)); | |
585 | } | |
586 | } | |
587 | ||
588 | static void filterexit(pid_t pid, int status, void *data) | |
589 | { | |
590 | struct transfer *transfer; | |
734dc54e | 591 | struct fnet *fnet; |
592 | wchar_t *peerid; | |
d3372da9 | 593 | |
594 | for(transfer = transfers; transfer != NULL; transfer = transfer->next) | |
595 | { | |
596 | if(transfer->filter == pid) | |
597 | { | |
598 | transfer->filter = -1; | |
599 | killfilter(transfer); | |
734dc54e | 600 | fnet = transfer->fnet; |
601 | peerid = swcsdup(transfer->peerid); | |
d3372da9 | 602 | if(WEXITSTATUS(status)) |
d3372da9 | 603 | resettransfer(transfer); |
734dc54e | 604 | else |
d3372da9 | 605 | freetransfer(transfer); |
734dc54e | 606 | trytransferbypeer(fnet, peerid); |
607 | free(peerid); | |
d3372da9 | 608 | break; |
609 | } | |
610 | } | |
611 | } | |
612 | ||
613 | int forkfilter(struct transfer *transfer) | |
614 | { | |
1d647d25 | 615 | char *filtername, *filename, *peerid, *buf, *p; |
d3372da9 | 616 | wchar_t *wfilename; |
617 | struct passwd *pwent; | |
618 | pid_t pid; | |
619 | int inpipe, outpipe; | |
620 | char **argv; | |
621 | size_t argvsize, argvdata; | |
622 | struct socket *insock, *outsock; | |
9ec790e8 | 623 | struct wcspair *ta; |
d3372da9 | 624 | char *rec, *val; |
625 | ||
9c161e77 | 626 | wfilename = fnfilebasename(transfer->path); |
d3372da9 | 627 | if(transfer->auth == NULL) |
628 | { | |
629 | flog(LOG_WARNING, "tried to fork filter for transfer with NULL authhandle (tranfer %i)", transfer->id); | |
630 | errno = EACCES; | |
631 | return(-1); | |
632 | } | |
633 | if((pwent = getpwuid(transfer->owner)) == NULL) | |
634 | { | |
635 | flog(LOG_WARNING, "no passwd entry for uid %i (found in transfer %i)", transfer->owner, transfer->id); | |
636 | errno = EACCES; | |
637 | return(-1); | |
638 | } | |
645a4af7 | 639 | filtername = findfile("dc-filter", pwent->pw_dir, 0); |
81386042 | 640 | if(filtername == NULL) |
645a4af7 | 641 | filtername = findfile(icswcstombs(confgetstr("transfer", "filter"), NULL, NULL), NULL, 0); |
81386042 | 642 | if(filtername == NULL) |
d3372da9 | 643 | { |
644 | flog(LOG_WARNING, "could not find filter for user %s", pwent->pw_name); | |
645 | errno = ENOENT; | |
646 | return(-1); | |
647 | } | |
648 | if((filename = icwcstombs(wfilename, NULL)) == NULL) | |
649 | { | |
650 | if((buf = icwcstombs(wfilename, "UTF-8")) == NULL) | |
651 | { | |
652 | flog(LOG_WARNING, "could convert transfer filename to neither local charset nor UTF-8: %s", strerror(errno)); | |
653 | return(-1); | |
654 | } | |
655 | filename = sprintf2("utf8-%s", buf); | |
656 | free(buf); | |
657 | } | |
658 | if((peerid = icwcstombs(transfer->peerid, NULL)) == NULL) | |
659 | { | |
660 | if((buf = icwcstombs(transfer->peerid, "UTF-8")) == NULL) | |
661 | { | |
662 | flog(LOG_WARNING, "could convert transfer peerid to neither local charset nor UTF-8: %s", strerror(errno)); | |
663 | free(filename); | |
664 | return(-1); | |
665 | } | |
666 | peerid = sprintf2("utf8-%s", buf); | |
667 | free(buf); | |
668 | } | |
1d647d25 FT |
669 | for(p = filename; *p; p++) { |
670 | if(*p == '/') | |
671 | *p = '_'; | |
672 | else if((p == filename) && (*p == '.')) | |
673 | *p = '_'; | |
674 | } | |
d3372da9 | 675 | 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) |
676 | { | |
677 | flog(LOG_WARNING, "could not fork session for filter for transfer %i: %s", transfer->id, strerror(errno)); | |
678 | return(-1); | |
679 | } | |
680 | if(pid == 0) | |
681 | { | |
682 | argv = NULL; | |
683 | argvsize = argvdata = 0; | |
dcf7a1a2 | 684 | buf = sprintf2("%ji", (intmax_t)transfer->size); |
d3372da9 | 685 | addtobuf(argv, filtername); |
686 | addtobuf(argv, filename); | |
687 | addtobuf(argv, buf); | |
688 | addtobuf(argv, peerid); | |
082b0419 | 689 | if(transfer->hash) |
690 | { | |
691 | if((buf = icwcstombs(unparsehash(transfer->hash), NULL)) != NULL) | |
692 | { | |
693 | /* XXX: I am very doubtful of this, but it can just as | |
694 | * well be argued that all data should be presented as | |
695 | * key-value pairs. */ | |
696 | addtobuf(argv, "hash"); | |
697 | addtobuf(argv, buf); | |
698 | } else { | |
699 | flog(LOG_WARNING, "could not convert hash to local charset"); | |
700 | } | |
701 | } | |
d3372da9 | 702 | for(ta = transfer->args; ta != NULL; ta = ta->next) |
703 | { | |
9ec790e8 | 704 | if((rec = icwcstombs(ta->key, NULL)) == NULL) |
d3372da9 | 705 | continue; |
706 | if((val = icwcstombs(ta->val, NULL)) == NULL) | |
707 | continue; | |
708 | addtobuf(argv, rec); | |
709 | addtobuf(argv, val); | |
710 | } | |
711 | addtobuf(argv, NULL); | |
712 | execv(filtername, argv); | |
713 | flog(LOG_WARNING, "could not exec filter %s: %s", filtername, strerror(errno)); | |
714 | exit(127); | |
715 | } | |
716 | insock = wrapsock(inpipe); | |
717 | outsock = wrapsock(outpipe); | |
718 | /* Really, really strange thing here - sometimes the kernel would | |
719 | * return POLLIN on insock, even though it's a write-side | |
720 | * pipe. The corresponding read on the pipe naturally returns | |
721 | * EBADF, causing doldacond to think there's something wrong with | |
722 | * the fd, and thus it closes it. Until I can find out whyever the | |
723 | * kernel gives a POLLIN on the fd (if I can at all...), I'll just | |
724 | * set ignread on insock for now. */ | |
81286a22 | 725 | /* sockblock(insock, 1); */ |
d3372da9 | 726 | transfer->filter = pid; |
727 | transfersetlocalend(transfer, insock); | |
728 | getsock(transfer->filterout = outsock); | |
cab0b442 | 729 | outsock->data = transfer; |
730 | outsock->readcb = (void (*)(struct socket *, void *))filterread; | |
d3372da9 | 731 | putsock(insock); |
732 | putsock(outsock); | |
733 | free(filtername); | |
734 | free(filename); | |
735 | free(peerid); | |
736 | return(0); | |
737 | } | |
738 | ||
739 | static int run(void) | |
740 | { | |
741 | struct transfer *transfer, *next; | |
742 | ||
743 | for(transfer = transfers; transfer != NULL; transfer = transfer->next) | |
744 | { | |
745 | if((transfer->endpos >= 0) && (transfer->state == TRNS_MAIN) && (transfer->localend != NULL) && (transfer->localend->state == SOCK_EST) && (transfer->curpos >= transfer->endpos)) | |
746 | { | |
747 | if((transfer->iface != NULL) && (transfer->iface->endofdata != NULL)) | |
748 | transfer->iface->endofdata(transfer, transfer->ifacedata); | |
749 | closesock(transfer->localend); | |
750 | } | |
751 | } | |
752 | for(transfer = transfers; transfer != NULL; transfer = next) | |
753 | { | |
754 | next = transfer->next; | |
755 | if(transfer->close) | |
756 | { | |
757 | transferdetach(transfer); | |
758 | freetransfer(transfer); | |
759 | continue; | |
760 | } | |
761 | } | |
762 | return(0); | |
763 | } | |
764 | ||
765 | static struct configvar myvars[] = | |
766 | { | |
d9f89ef5 | 767 | /** The maximum number of simultaneously permitted uploads. A |
768 | * common hub rule is that you will need at least as many slots as | |
769 | * the number of hubs to which you are connected. */ | |
d3372da9 | 770 | {CONF_VAR_INT, "slots", {.num = 3}}, |
d9f89ef5 | 771 | /** The TOS value to use for upload connections (see the TOS |
772 | * VALUES section). */ | |
d3372da9 | 773 | {CONF_VAR_INT, "ultos", {.num = SOCK_TOS_MAXTP}}, |
d9f89ef5 | 774 | /** The TOS value to use for download connections (see the TOS |
775 | * VALUES section). */ | |
d3372da9 | 776 | {CONF_VAR_INT, "dltos", {.num = SOCK_TOS_MAXTP}}, |
d9f89ef5 | 777 | /** The name of the filter script (see the FILES section for |
778 | * lookup information). */ | |
d3372da9 | 779 | {CONF_VAR_STRING, "filter", {.str = L"dc-filter"}}, |
d9f89ef5 | 780 | /** If true, only one upload is allowed per remote peer. This |
781 | * option is still experimental, so it is recommended to leave it | |
782 | * off. */ | |
01663fd9 | 783 | {CONF_VAR_BOOL, "ulquota", {.num = 0}}, |
d3372da9 | 784 | {CONF_VAR_END} |
785 | }; | |
786 | ||
787 | static struct module me = | |
788 | { | |
789 | .conf = | |
790 | { | |
791 | .vars = myvars | |
792 | }, | |
793 | .name = "transfer", | |
794 | .run = run | |
795 | }; | |
796 | ||
797 | MODULE(me); |