2 * Dolda Connect - Modular multiuser Direct Connect-style client
3 * Copyright (C) 2004 Fredrik Tolf (fredrik@dolda2000.com)
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.
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.
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
35 #include "sysevents.h"
41 static void killfilter(struct transfer *transfer);
43 struct transfer *transfers = NULL;
45 GCBCHAIN(newtransfercb, struct transfer *);
47 void freetransfer(struct transfer *transfer)
49 if(transfer == transfers)
50 transfers = transfer->next;
51 if(transfer->next != NULL)
52 transfer->next->prev = transfer->prev;
53 if(transfer->prev != NULL)
54 transfer->prev->next = transfer->next;
55 CBCHAINDOCB(transfer, trans_destroy, transfer);
56 CBCHAINFREE(transfer, trans_ac);
57 CBCHAINFREE(transfer, trans_act);
58 CBCHAINFREE(transfer, trans_p);
59 CBCHAINFREE(transfer, trans_destroy);
60 CBCHAINFREE(transfer, trans_filterout);
61 while(transfer->args != NULL)
62 freewcspair(transfer->args, &transfer->args);
63 if(transfer->filter != -1)
65 if(transfer->etimer != NULL)
66 canceltimer(transfer->etimer);
67 if(transfer->auth != NULL)
68 authputhandle(transfer->auth);
69 if(transfer->peerid != NULL)
70 free(transfer->peerid);
71 if(transfer->peernick != NULL)
72 free(transfer->peernick);
73 if(transfer->path != NULL)
75 if(transfer->actdesc != NULL)
76 free(transfer->actdesc);
77 if(transfer->filterbuf != NULL)
78 free(transfer->filterbuf);
79 if(transfer->hash != NULL)
80 freehash(transfer->hash);
81 if(transfer->localend != NULL)
83 transfer->localend->readcb = NULL;
84 transfer->localend->writecb = NULL;
85 transfer->localend->errcb = NULL;
86 putsock(transfer->localend);
88 if(transfer->filterout != NULL)
90 transfer->filterout->readcb = NULL;
91 transfer->filterout->writecb = NULL;
92 transfer->filterout->errcb = NULL;
93 putsock(transfer->filterout);
95 if(transfer->fn != NULL)
96 putfnetnode(transfer->fn);
101 struct transfer *newtransfer(void)
103 struct transfer *new;
104 static int curid = 0;
106 new = smalloc(sizeof(*new));
107 memset(new, 0, sizeof(*new));
112 CBCHAININIT(new, trans_ac);
113 CBCHAININIT(new, trans_act);
114 CBCHAININIT(new, trans_p);
115 CBCHAININIT(new, trans_destroy);
116 CBCHAININIT(new, trans_filterout);
119 time(&new->activity);
124 void transferattach(struct transfer *transfer, struct transferiface *iface, void *data)
126 if(transfer->iface != NULL)
127 transferdetach(transfer);
128 transfer->iface = iface;
129 transfer->ifacedata = data;
132 void transferdetach(struct transfer *transfer)
134 if(transfer->iface != NULL)
136 transfer->iface->detach(transfer, transfer->ifacedata);
137 transfer->iface = NULL;
138 transfer->ifacedata = NULL;
142 struct transfer *finddownload(wchar_t *peerid)
144 struct transfer *transfer;
146 for(transfer = transfers; transfer != NULL; transfer = transfer->next)
148 if((transfer->dir == TRNSD_DOWN) && (transfer->iface == NULL) && !wcscmp(peerid, transfer->peerid))
154 struct transfer *newupload(struct fnetnode *fn, struct fnet *fnet, wchar_t *nickid, struct transferiface *iface, void *data)
156 struct transfer *transfer;
158 transfer = newtransfer();
160 transfer->fnet = fnet;
162 transfer->fnet = fn->fnet;
163 transfer->peerid = swcsdup(nickid);
164 transfer->state = TRNS_HS;
165 transfer->dir = TRNSD_UP;
167 getfnetnode(transfer->fn = fn);
168 transferattach(transfer, iface, data);
169 linktransfer(transfer);
170 bumptransfer(transfer);
174 void linktransfer(struct transfer *transfer)
176 transfer->next = transfers;
177 transfer->prev = NULL;
178 if(transfers != NULL)
179 transfers->prev = transfer;
180 transfers = transfer;
181 GCBCHAINDOCB(newtransfercb, transfer);
184 void resettransfer(struct transfer *transfer)
186 if(transfer->dir == TRNSD_DOWN)
188 if(transfer->iface != NULL)
189 transferdetach(transfer);
190 killfilter(transfer);
191 transfersetstate(transfer, TRNS_WAITING);
192 transfersetactivity(transfer, L"reset");
197 struct transfer *findtransfer(int id)
199 struct transfer *transfer;
201 for(transfer = transfers; transfer != NULL; transfer = transfer->next)
203 if(transfer->id == id)
209 static void transexpire(int cancelled, struct transfer *transfer)
211 transfer->etimer = NULL;
213 bumptransfer(transfer);
215 transfer->timeout = 0;
218 static void transferread(struct socket *sk, struct transfer *transfer)
220 if(sockgetdatalen(sk) >= 65536)
222 if((transfer->iface != NULL) && (transfer->iface->gotdata != NULL))
223 transfer->iface->gotdata(transfer, transfer->ifacedata);
226 static void transferwrite(struct socket *sk, struct transfer *transfer)
228 if((transfer->iface != NULL) && (transfer->iface->wantdata != NULL))
229 transfer->iface->wantdata(transfer, transfer->ifacedata);
232 static void transfererr(struct socket *sk, int errno, struct transfer *transfer)
234 if((transfer->iface != NULL) && (transfer->iface->endofdata != NULL))
235 transfer->iface->endofdata(transfer, transfer->ifacedata);
238 void transferputdata(struct transfer *transfer, void *buf, size_t size)
240 time(&transfer->activity);
241 sockqueue(transfer->localend, buf, size);
242 transfer->curpos += size;
243 CBCHAINDOCB(transfer, trans_p, transfer);
246 void transferendofdata(struct transfer *transfer)
248 if(transfer->curpos >= transfer->size)
250 transfersetstate(transfer, TRNS_DONE);
251 transfer->localend->readcb = NULL;
252 transfer->localend->writecb = NULL;
253 transfer->localend->errcb = NULL;
254 putsock(transfer->localend);
255 transfer->localend = NULL;
257 resettransfer(transfer);
261 size_t transferdatasize(struct transfer *transfer)
263 return(sockqueuesize(transfer->localend));
266 void *transfergetdata(struct transfer *transfer, size_t *size)
270 if(transfer->localend == NULL)
272 transfer->localend->ignread = 0;
273 time(&transfer->activity);
274 if((buf = sockgetinbuf(transfer->localend, size)) == NULL)
276 if((transfer->endpos >= 0) && (transfer->curpos + *size >= transfer->endpos))
278 *size = transfer->endpos - transfer->curpos;
279 buf = srealloc(buf, *size);
281 transfer->curpos += *size;
282 CBCHAINDOCB(transfer, trans_p, transfer);
286 void transferprepul(struct transfer *transfer, size_t size, size_t start, size_t end, struct socket *lesk)
288 transfersetsize(transfer, size);
289 transfer->curpos = start;
290 transfer->endpos = end;
292 transfersetlocalend(transfer, lesk);
295 void transferstartdl(struct transfer *transfer, struct socket *sk)
297 transfersetstate(transfer, TRNS_MAIN);
298 socksettos(sk, confgetint("transfer", "dltos"));
301 void transferstartul(struct transfer *transfer, struct socket *sk)
303 transfersetstate(transfer, TRNS_MAIN);
304 socksettos(sk, confgetint("transfer", "ultos"));
305 if(transfer->localend != NULL)
306 transfer->localend->ignread = 0;
309 void transfersetlocalend(struct transfer *transfer, struct socket *sk)
311 if(transfer->localend != NULL)
312 putsock(transfer->localend);
313 getsock(transfer->localend = sk);
315 sk->readcb = (void (*)(struct socket *, void *))transferread;
316 sk->writecb = (void (*)(struct socket *, void *))transferwrite;
317 sk->errcb = (void (*)(struct socket *, int, void *))transfererr;
320 void bumptransfer(struct transfer *transfer)
323 struct fnetpeer *peer;
326 if((now = time(NULL)) < transfer->timeout)
328 if(transfer->etimer == NULL)
329 transfer->etimer = timercallback(transfer->timeout, (void (*)(int, void *))transexpire, transfer);
332 if(transfer->etimer != NULL)
333 canceltimer(transfer->etimer);
334 switch(transfer->state)
337 if(transfer->fn != NULL)
340 if(fn->state != FNN_EST)
345 peer = fnetfindpeer(fn, transfer->peerid);
348 for(fn = fnetnodes; fn != NULL; fn = fn->next)
350 if((fn->state == FNN_EST) && (fn->fnet == transfer->fnet) && ((peer = fnetfindpeer(fn, transfer->peerid)) != NULL))
354 transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 30), (void (*)(int, void *))transexpire, transfer);
355 if(now - transfer->lastreq > 30)
359 fn->fnet->reqconn(peer);
360 time(&transfer->lastreq);
365 if(transfer->dir == TRNSD_UP)
367 if(now - transfer->activity < 60)
368 transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 60), (void (*)(int, void *))transexpire, transfer);
371 } else if(transfer->dir == TRNSD_DOWN) {
372 if(now - transfer->activity < 60)
373 transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 60), (void (*)(int, void *))transexpire, transfer);
375 resettransfer(transfer);
379 if(transfer->dir == TRNSD_UP)
381 if(now - transfer->activity < 300)
382 transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 300), (void (*)(int, void *))transexpire, transfer);
390 void transfersetactivity(struct transfer *transfer, wchar_t *desc)
392 time(&transfer->activity);
395 if(transfer->actdesc != NULL)
396 free(transfer->actdesc);
397 transfer->actdesc = swcsdup(desc);
399 bumptransfer(transfer);
400 CBCHAINDOCB(transfer, trans_act, transfer);
403 void transfersetstate(struct transfer *transfer, int newstate)
405 transfer->state = newstate;
406 if(transfer->etimer != NULL)
407 canceltimer(transfer->etimer);
408 transfersetactivity(transfer, NULL);
409 CBCHAINDOCB(transfer, trans_ac, transfer, L"state");
412 void transfersetnick(struct transfer *transfer, wchar_t *newnick)
414 if(transfer->peernick != NULL)
415 free(transfer->peernick);
416 transfer->peernick = swcsdup(newnick);
417 CBCHAINDOCB(transfer, trans_ac, transfer, L"nick");
420 void transfersetsize(struct transfer *transfer, int newsize)
422 transfer->size = newsize;
423 CBCHAINDOCB(transfer, trans_ac, transfer, L"size");
426 void transferseterror(struct transfer *transfer, int error)
428 transfer->error = error;
429 CBCHAINDOCB(transfer, trans_ac, transfer, L"error");
432 void transfersetpath(struct transfer *transfer, wchar_t *path)
434 if(transfer->path != NULL)
435 free(transfer->path);
436 transfer->path = swcsdup(path);
437 CBCHAINDOCB(transfer, trans_ac, transfer, L"path");
440 void transfersethash(struct transfer *transfer, struct hash *hash)
442 if(transfer->hash != NULL)
443 freehash(transfer->hash);
444 transfer->hash = hash;
445 CBCHAINDOCB(transfer, trans_ac, transfer, L"hash");
450 struct transfer *transfer;
453 slots = confgetint("transfer", "slots");
454 for(transfer = transfers; (transfer != NULL) && (slots > 0); transfer = transfer->next)
456 if((transfer->dir == TRNSD_UP) && (transfer->state == TRNS_MAIN) && !transfer->flags.b.minislot)
462 static void killfilter(struct transfer *transfer)
464 if(transfer->filter != -1)
466 kill(-transfer->filter, SIGHUP);
467 transfer->filter = -1;
469 if(transfer->localend)
471 transfer->localend->readcb = NULL;
472 transfer->localend->writecb = NULL;
473 transfer->localend->errcb = NULL;
474 putsock(transfer->localend);
475 transfer->localend = NULL;
477 if(transfer->filterout)
479 transfer->filterout->readcb = NULL;
480 putsock(transfer->filterout);
481 transfer->filterout = NULL;
483 if(transfer->filterbuf)
485 free(transfer->filterbuf);
486 transfer->filterbuf = NULL;
488 transfer->filterbufsize = transfer->filterbufdata = 0;
491 static char *findfilter(struct passwd *pwd)
493 char *path, *filtername;
495 if((path = sprintf2("%s/.dcdl-filter", pwd->pw_dir)) != NULL)
497 if(!access(path, X_OK))
501 if((filtername = icwcstombs(confgetstr("transfer", "filter"), NULL)) == NULL)
503 flog(LOG_WARNING, "could not convert filter name into local charset: %s", strerror(errno));
505 if(strchr(filtername, '/') == NULL)
507 if((path = sprintf2("/etc/%s", filtername)) != NULL)
509 if(!access(path, X_OK))
516 if((path = sprintf2("/usr/etc/%s", filtername)) != NULL)
518 if(!access(path, X_OK))
525 if((path = sprintf2("/usr/local/etc/%s", filtername)) != NULL)
527 if(!access(path, X_OK))
535 if(!access(filtername, X_OK))
543 static void filterread(struct socket *sk, struct transfer *transfer)
549 if((buf = sockgetinbuf(sk, &bufsize)) == NULL)
551 bufcat(transfer->filterbuf, buf, bufsize);
553 if((p = memchr(transfer->filterbuf, '\n', transfer->filterbufdata)) != NULL)
556 if((p2 = strchr(transfer->filterbuf, ' ')) != NULL)
558 if((cmd = icmbstowcs(transfer->filterbuf, NULL)) != NULL)
563 if((arg = icmbstowcs(p2, NULL)) == NULL)
564 flog(LOG_WARNING, "filter sent a string which could not be converted into the local charset: %s: %s", transfer->filterbuf, strerror(errno));
566 CBCHAINDOCB(transfer, trans_filterout, transfer, cmd, arg);
571 flog(LOG_WARNING, "filter sent a string which could not be converted into the local charset: %s: %s", transfer->filterbuf, strerror(errno));
573 memmove(transfer->filterbuf, p, transfer->filterbufdata -= (p - transfer->filterbuf));
577 static void filterexit(pid_t pid, int status, void *data)
579 struct transfer *transfer;
581 for(transfer = transfers; transfer != NULL; transfer = transfer->next)
583 if(transfer->filter == pid)
585 transfer->filter = -1;
586 killfilter(transfer);
587 if(WEXITSTATUS(status))
589 resettransfer(transfer);
591 freetransfer(transfer);
598 int forkfilter(struct transfer *transfer)
600 char *filtername, *filename, *peerid, *buf;
602 struct passwd *pwent;
606 size_t argvsize, argvdata;
607 struct socket *insock, *outsock;
611 wfilename = transfer->path;
612 if(transfer->fnet->filebasename != NULL)
613 wfilename = transfer->fnet->filebasename(wfilename);
614 if(transfer->auth == NULL)
616 flog(LOG_WARNING, "tried to fork filter for transfer with NULL authhandle (tranfer %i)", transfer->id);
620 if((pwent = getpwuid(transfer->owner)) == NULL)
622 flog(LOG_WARNING, "no passwd entry for uid %i (found in transfer %i)", transfer->owner, transfer->id);
626 if((filtername = findfilter(pwent)) == NULL)
628 flog(LOG_WARNING, "could not find filter for user %s", pwent->pw_name);
632 if((filename = icwcstombs(wfilename, NULL)) == NULL)
634 if((buf = icwcstombs(wfilename, "UTF-8")) == NULL)
636 flog(LOG_WARNING, "could convert transfer filename to neither local charset nor UTF-8: %s", strerror(errno));
639 filename = sprintf2("utf8-%s", buf);
642 if((peerid = icwcstombs(transfer->peerid, NULL)) == NULL)
644 if((buf = icwcstombs(transfer->peerid, "UTF-8")) == NULL)
646 flog(LOG_WARNING, "could convert transfer peerid to neither local charset nor UTF-8: %s", strerror(errno));
650 peerid = sprintf2("utf8-%s", buf);
653 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)
655 flog(LOG_WARNING, "could not fork session for filter for transfer %i: %s", transfer->id, strerror(errno));
661 argvsize = argvdata = 0;
662 buf = sprintf2("%i", transfer->size);
663 addtobuf(argv, filtername);
664 addtobuf(argv, filename);
666 addtobuf(argv, peerid);
669 if((buf = icwcstombs(unparsehash(transfer->hash), NULL)) != NULL)
671 /* XXX: I am very doubtful of this, but it can just as
672 * well be argued that all data should be presented as
673 * key-value pairs. */
674 addtobuf(argv, "hash");
677 flog(LOG_WARNING, "could not convert hash to local charset");
680 for(ta = transfer->args; ta != NULL; ta = ta->next)
682 if((rec = icwcstombs(ta->key, NULL)) == NULL)
684 if((val = icwcstombs(ta->val, NULL)) == NULL)
689 addtobuf(argv, NULL);
690 execv(filtername, argv);
691 flog(LOG_WARNING, "could not exec filter %s: %s", filtername, strerror(errno));
694 insock = wrapsock(inpipe);
695 outsock = wrapsock(outpipe);
696 /* Really, really strange thing here - sometimes the kernel would
697 * return POLLIN on insock, even though it's a write-side
698 * pipe. The corresponding read on the pipe naturally returns
699 * EBADF, causing doldacond to think there's something wrong with
700 * the fd, and thus it closes it. Until I can find out whyever the
701 * kernel gives a POLLIN on the fd (if I can at all...), I'll just
702 * set ignread on insock for now. */
704 transfer->filter = pid;
705 transfersetlocalend(transfer, insock);
706 getsock(transfer->filterout = outsock);
707 outsock->data = transfer;
708 outsock->readcb = (void (*)(struct socket *, void *))filterread;
719 struct transfer *transfer, *next;
721 for(transfer = transfers; transfer != NULL; transfer = transfer->next)
723 if((transfer->endpos >= 0) && (transfer->state == TRNS_MAIN) && (transfer->localend != NULL) && (transfer->localend->state == SOCK_EST) && (transfer->curpos >= transfer->endpos))
725 if((transfer->iface != NULL) && (transfer->iface->endofdata != NULL))
726 transfer->iface->endofdata(transfer, transfer->ifacedata);
727 closesock(transfer->localend);
730 for(transfer = transfers; transfer != NULL; transfer = next)
732 next = transfer->next;
735 transferdetach(transfer);
736 freetransfer(transfer);
743 static struct configvar myvars[] =
745 {CONF_VAR_INT, "slots", {.num = 3}},
746 {CONF_VAR_INT, "ultos", {.num = SOCK_TOS_MAXTP}},
747 {CONF_VAR_INT, "dltos", {.num = SOCK_TOS_MAXTP}},
748 {CONF_VAR_STRING, "filter", {.str = L"dc-filter"}},
752 static struct module me =