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
36 #include "sysevents.h"
42 static void killfilter(struct transfer *transfer);
44 unsigned long long bytesupload = 0;
45 unsigned long long bytesdownload = 0;
46 struct transfer *transfers = NULL;
48 GCBCHAIN(newtransfercb, struct transfer *);
50 void freetransfer(struct transfer *transfer)
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);
64 while(transfer->args != NULL)
65 freewcspair(transfer->args, &transfer->args);
66 if(transfer->filter != -1)
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)
78 if(transfer->actdesc != NULL)
79 free(transfer->actdesc);
80 if(transfer->filterbuf != NULL)
81 free(transfer->filterbuf);
82 if(transfer->hash != NULL)
83 freehash(transfer->hash);
84 if(transfer->exitstatus != NULL)
85 free(transfer->exitstatus);
86 if(transfer->localend != NULL)
88 transfer->localend->readcb = NULL;
89 transfer->localend->writecb = NULL;
90 transfer->localend->errcb = NULL;
91 putsock(transfer->localend);
93 if(transfer->filterout != NULL)
95 transfer->filterout->readcb = NULL;
96 transfer->filterout->writecb = NULL;
97 transfer->filterout->errcb = NULL;
98 putsock(transfer->filterout);
100 if(transfer->fn != NULL)
101 putfnetnode(transfer->fn);
106 struct transfer *newtransfer(void)
108 struct transfer *new;
109 static int curid = 0;
111 new = smalloc(sizeof(*new));
112 memset(new, 0, sizeof(*new));
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);
124 time(&new->activity);
129 static void localread(struct socket *sk, struct transfer *transfer)
134 if((transfer->datapipe != NULL) && (sockqueueleft(transfer->datapipe) > 0)) {
135 buf = sockgetinbuf(sk, &blen);
136 sockqueue(transfer->datapipe, buf, blen);
140 static void dataread(struct socket *sk, struct transfer *transfer)
145 if((transfer->localend != NULL) && (sockqueueleft(transfer->localend) > 0)) {
146 buf = sockgetinbuf(sk, &blen);
147 sockqueue(transfer->localend, buf, blen);
151 static void localwrite(struct socket *sk, struct transfer *transfer)
153 if(transfer->datapipe != NULL)
154 dataread(transfer->datapipe, transfer);
157 static void datawrite(struct socket *sk, struct transfer *transfer)
159 if(transfer->localend != NULL)
160 localread(transfer->localend, transfer);
163 static void localerr(struct socket *sk, int errno, struct transfer *transfer)
165 if(transfer->datapipe != NULL)
166 closesock(transfer->datapipe);
169 static void dataerr(struct socket *sk, int errno, struct transfer *transfer)
171 if(transfer->localend != NULL)
172 closesock(transfer->localend);
175 void transferattach(struct transfer *transfer, struct socket *dpipe)
177 transferdetach(transfer);
178 getsock(transfer->datapipe = dpipe);
179 dpipe->readcb = (void (*)(struct socket *, void *))dataread;
180 dpipe->writecb = (void (*)(struct socket *, void *))datawrite;
181 dpipe->errcb = (void (*)(struct socket *, int, void *))dataerr;
182 dpipe->data = transfer;
185 void transferdetach(struct transfer *transfer)
187 if(transfer->datapipe != NULL) {
188 transfer->datapipe->readcb = NULL;
189 transfer->datapipe->writecb = NULL;
190 transfer->datapipe->errcb = NULL;
191 closesock(transfer->datapipe);
192 putsock(transfer->datapipe);
194 transfer->datapipe = NULL;
197 struct transfer *finddownload(wchar_t *peerid)
199 struct transfer *transfer;
201 for(transfer = transfers; transfer != NULL; transfer = transfer->next)
203 if((transfer->dir == TRNSD_DOWN) && (transfer->datapipe == NULL) && !wcscmp(peerid, transfer->peerid))
209 struct transfer *hasupload(struct fnet *fnet, wchar_t *peerid)
211 struct transfer *transfer;
213 for(transfer = transfers; transfer != NULL; transfer = transfer->next)
215 if((transfer->dir == TRNSD_UP) && (transfer->fnet == fnet) && !wcscmp(transfer->peerid, peerid))
221 struct transfer *newupload(struct fnetnode *fn, struct fnet *fnet, wchar_t *nickid, struct socket *dpipe)
223 struct transfer *transfer;
225 transfer = newtransfer();
227 transfer->fnet = fnet;
229 transfer->fnet = fn->fnet;
230 transfer->peerid = swcsdup(nickid);
231 transfer->state = TRNS_HS;
232 transfer->dir = TRNSD_UP;
234 getfnetnode(transfer->fn = fn);
235 transferattach(transfer, dpipe);
236 linktransfer(transfer);
237 bumptransfer(transfer);
241 void linktransfer(struct transfer *transfer)
243 transfer->next = transfers;
244 transfer->prev = NULL;
245 if(transfers != NULL)
246 transfers->prev = transfer;
247 transfers = transfer;
248 GCBCHAINDOCB(newtransfercb, transfer);
251 void resettransfer(struct transfer *transfer)
253 if(transfer->dir == TRNSD_DOWN)
255 transferdetach(transfer);
256 killfilter(transfer);
257 transfersetstate(transfer, TRNS_WAITING);
258 transfersetactivity(transfer, L"reset");
263 struct transfer *findtransfer(int id)
265 struct transfer *transfer;
267 for(transfer = transfers; transfer != NULL; transfer = transfer->next)
269 if(transfer->id == id)
275 static void transexpire(int cancelled, struct transfer *transfer)
277 transfer->etimer = NULL;
279 bumptransfer(transfer);
281 transfer->timeout = 0;
284 static void transferputdata(struct transfer *transfer, void *buf, size_t size)
286 time(&transfer->activity);
287 sockqueue(transfer->localend, buf, size);
288 transfer->curpos += size;
289 bytesdownload += size;
290 CBCHAINDOCB(transfer, trans_p, transfer);
293 static void transferendofdata(struct transfer *transfer)
295 if(transfer->curpos >= transfer->size)
297 transfersetstate(transfer, TRNS_DONE);
298 transfer->localend->readcb = NULL;
299 transfer->localend->writecb = NULL;
300 transfer->localend->errcb = NULL;
301 putsock(transfer->localend);
302 transfer->localend = NULL;
304 resettransfer(transfer);
308 static ssize_t transferdatasize(struct transfer *transfer)
310 return(sockqueueleft(transfer->localend));
313 static void *transfergetdata(struct transfer *transfer, size_t *size)
317 if(transfer->localend == NULL)
319 time(&transfer->activity);
320 if((buf = sockgetinbuf(transfer->localend, size)) == NULL)
322 if((transfer->endpos >= 0) && (transfer->curpos + *size >= transfer->endpos))
324 if((*size = transfer->endpos - transfer->curpos) == 0) {
328 buf = srealloc(buf, *size);
331 transfer->curpos += *size;
332 bytesupload += *size;
333 CBCHAINDOCB(transfer, trans_p, transfer);
337 void transferprepul(struct transfer *transfer, off_t size, off_t start, off_t end, struct socket *lesk)
339 transfersetsize(transfer, size);
340 transfer->curpos = start;
341 transfer->endpos = end;
342 transfersetlocalend(transfer, lesk);
345 void transferstartdl(struct transfer *transfer, struct socket *sk)
347 transfersetstate(transfer, TRNS_MAIN);
348 socksettos(sk, confgetint("transfer", "dltos"));
351 void transferstartul(struct transfer *transfer, struct socket *sk)
353 transfersetstate(transfer, TRNS_MAIN);
354 socksettos(sk, confgetint("transfer", "ultos"));
355 if(transfer->localend != NULL)
356 localread(transfer->localend, transfer);
359 void transfersetlocalend(struct transfer *transfer, struct socket *sk)
361 if(transfer->localend != NULL)
362 putsock(transfer->localend);
363 getsock(transfer->localend = sk);
365 sk->readcb = (void (*)(struct socket *, void *))localread;
366 sk->writecb = (void (*)(struct socket *, void *))localwrite;
367 sk->errcb = (void (*)(struct socket *, int, void *))localerr;
370 static int tryreq(struct transfer *transfer)
373 struct fnetpeer *peer;
375 if((fn = transfer->fn) != NULL)
377 if(fn->state != FNN_EST)
382 peer = fnetfindpeer(fn, transfer->peerid);
385 for(fn = fnetnodes; fn != NULL; fn = fn->next)
387 if((fn->state == FNN_EST) && (fn->fnet == transfer->fnet) && ((peer = fnetfindpeer(fn, transfer->peerid)) != NULL))
393 time(&transfer->lastreq);
394 return(fn->fnet->reqconn(peer));
399 void trytransferbypeer(struct fnet *fnet, wchar_t *peerid)
401 struct transfer *transfer;
403 for(transfer = transfers; transfer != NULL; transfer = transfer->next)
405 if((transfer->dir == TRNSD_DOWN) && (transfer->state == TRNS_WAITING))
407 if((transfer->fnet == fnet) && !wcscmp(transfer->peerid, peerid))
409 if(!tryreq(transfer))
416 void bumptransfer(struct transfer *transfer)
420 if((now = time(NULL)) < transfer->timeout)
423 if(transfer->etimer == NULL)
424 transfer->etimer = timercallback(transfer->timeout, (void (*)(int, void *))transexpire, transfer);
427 if(transfer->etimer != NULL)
428 canceltimer(transfer->etimer);
429 switch(transfer->state)
432 transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 30), (void (*)(int, void *))transexpire, transfer);
433 if(now - transfer->lastreq > 30)
437 if(transfer->dir == TRNSD_UP)
439 if(now - transfer->activity < 60)
440 transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 60), (void (*)(int, void *))transexpire, transfer);
443 } else if(transfer->dir == TRNSD_DOWN) {
444 if(now - transfer->activity < 60)
445 transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 60), (void (*)(int, void *))transexpire, transfer);
447 resettransfer(transfer);
451 if(transfer->dir == TRNSD_UP)
453 if(now - transfer->activity < 300)
454 transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 300), (void (*)(int, void *))transexpire, transfer);
462 void transfersetactivity(struct transfer *transfer, wchar_t *desc)
464 time(&transfer->activity);
467 if(transfer->actdesc != NULL)
468 free(transfer->actdesc);
469 transfer->actdesc = swcsdup(desc);
471 bumptransfer(transfer);
472 CBCHAINDOCB(transfer, trans_act, transfer);
475 void transfersetstate(struct transfer *transfer, int newstate)
477 transfer->state = newstate;
478 if(transfer->etimer != NULL)
479 canceltimer(transfer->etimer);
480 transfersetactivity(transfer, NULL);
481 CBCHAINDOCB(transfer, trans_ac, transfer, L"state");
484 void transfersetnick(struct transfer *transfer, wchar_t *newnick)
486 if(transfer->peernick != NULL)
487 free(transfer->peernick);
488 transfer->peernick = swcsdup(newnick);
489 CBCHAINDOCB(transfer, trans_ac, transfer, L"nick");
492 void transfersetsize(struct transfer *transfer, off_t newsize)
494 transfer->size = newsize;
495 CBCHAINDOCB(transfer, trans_ac, transfer, L"size");
498 void transferseterror(struct transfer *transfer, int error)
500 transfer->error = error;
501 CBCHAINDOCB(transfer, trans_ac, transfer, L"error");
504 void transfersetpath(struct transfer *transfer, wchar_t *path)
506 if(transfer->path != NULL)
507 free(transfer->path);
508 transfer->path = swcsdup(path);
509 CBCHAINDOCB(transfer, trans_ac, transfer, L"path");
512 void transfersethash(struct transfer *transfer, struct hash *hash)
514 if(transfer->hash != NULL)
515 freehash(transfer->hash);
516 transfer->hash = hash;
517 CBCHAINDOCB(transfer, trans_ac, transfer, L"hash");
522 struct transfer *transfer;
525 slots = confgetint("transfer", "slots");
526 for(transfer = transfers; (transfer != NULL) && (slots > 0); transfer = transfer->next)
528 if((transfer->dir == TRNSD_UP) && (transfer->state == TRNS_MAIN) && !transfer->flags.b.minislot)
534 static void killfilter(struct transfer *transfer)
536 if(transfer->filter != -1)
538 kill(-transfer->filter, SIGHUP);
539 transfer->filter = -1;
541 if(transfer->localend)
543 transfer->localend->readcb = NULL;
544 transfer->localend->writecb = NULL;
545 transfer->localend->errcb = NULL;
546 putsock(transfer->localend);
547 transfer->localend = NULL;
549 if(transfer->filterout)
551 transfer->filterout->readcb = NULL;
552 putsock(transfer->filterout);
553 transfer->filterout = NULL;
555 if(transfer->filterbuf)
557 free(transfer->filterbuf);
558 transfer->filterbuf = NULL;
560 transfer->filterbufsize = transfer->filterbufdata = 0;
563 static void handletranscmd(struct transfer *transfer, wchar_t *cmd, wchar_t *arg)
565 if(!wcscmp(cmd, L"status")) {
568 if(transfer->exitstatus != NULL)
569 free(transfer->exitstatus);
570 transfer->exitstatus = swcsdup(arg);
574 static void filterread(struct socket *sk, struct transfer *transfer)
580 if((buf = sockgetinbuf(sk, &bufsize)) == NULL)
582 bufcat(transfer->filterbuf, buf, bufsize);
584 while((p = memchr(transfer->filterbuf, '\n', transfer->filterbufdata)) != NULL)
587 if((p2 = strchr(transfer->filterbuf, ' ')) != NULL)
589 if((cmd = icmbstowcs(transfer->filterbuf, NULL)) != NULL)
594 if((arg = icmbstowcs(p2, NULL)) == NULL)
595 flog(LOG_WARNING, "filter sent a string which could not be converted into the local charset: %s: %s", p2, strerror(errno));
597 handletranscmd(transfer, cmd, arg);
598 CBCHAINDOCB(transfer, trans_filterout, transfer, cmd, arg);
603 flog(LOG_WARNING, "filter sent a string which could not be converted into the local charset: %s: %s", transfer->filterbuf, strerror(errno));
605 memmove(transfer->filterbuf, p, transfer->filterbufdata -= (p - transfer->filterbuf));
609 static void filterexit(pid_t pid, int status, void *data)
611 struct transfer *transfer;
615 for(transfer = transfers; transfer != NULL; transfer = transfer->next)
617 if(transfer->filter == pid)
619 transfer->filter = -1;
620 killfilter(transfer);
621 fnet = transfer->fnet;
622 peerid = swcsdup(transfer->peerid);
623 if(WEXITSTATUS(status))
624 resettransfer(transfer);
626 freetransfer(transfer);
627 trytransferbypeer(fnet, peerid);
634 int forkfilter(struct transfer *transfer)
636 char *filtername, *filename, *peerid, *buf, *p;
638 struct passwd *pwent;
642 size_t argvsize, argvdata;
643 struct socket *insock, *outsock;
647 wfilename = fnfilebasename(transfer->path);
648 if(transfer->auth == NULL)
650 flog(LOG_WARNING, "tried to fork filter for transfer with NULL authhandle (tranfer %i)", transfer->id);
654 if((pwent = getpwuid(transfer->owner)) == NULL)
656 flog(LOG_WARNING, "no passwd entry for uid %i (found in transfer %i)", transfer->owner, transfer->id);
660 filtername = findfile("dc-filter", pwent->pw_dir, 0);
661 if(filtername == NULL)
662 filtername = findfile(icswcstombs(confgetstr("transfer", "filter"), NULL, NULL), NULL, 0);
663 if(filtername == NULL)
665 flog(LOG_WARNING, "could not find filter for user %s", pwent->pw_name);
669 if((filename = icwcstombs(wfilename, NULL)) == NULL)
671 if((buf = icwcstombs(wfilename, "UTF-8")) == NULL)
673 flog(LOG_WARNING, "could convert transfer filename to neither local charset nor UTF-8: %s", strerror(errno));
676 filename = sprintf2("utf8-%s", buf);
679 if((peerid = icwcstombs(transfer->peerid, NULL)) == NULL)
681 if((buf = icwcstombs(transfer->peerid, "UTF-8")) == NULL)
683 flog(LOG_WARNING, "could convert transfer peerid to neither local charset nor UTF-8: %s", strerror(errno));
687 peerid = sprintf2("utf8-%s", buf);
690 for(p = filename; *p; p++) {
693 else if((p == filename) && (*p == '.'))
696 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)
698 flog(LOG_WARNING, "could not fork session for filter for transfer %i: %s", transfer->id, strerror(errno));
704 argvsize = argvdata = 0;
705 buf = sprintf2("%ji", (intmax_t)transfer->size);
706 addtobuf(argv, filtername);
707 addtobuf(argv, filename);
709 addtobuf(argv, peerid);
712 if((buf = icwcstombs(unparsehash(transfer->hash), NULL)) != NULL)
714 /* XXX: I am very doubtful of this, but it can just as
715 * well be argued that all data should be presented as
716 * key-value pairs. */
717 addtobuf(argv, "hash");
720 flog(LOG_WARNING, "could not convert hash to local charset");
723 for(ta = transfer->args; ta != NULL; ta = ta->next)
725 if((rec = icwcstombs(ta->key, NULL)) == NULL)
727 if((val = icwcstombs(ta->val, NULL)) == NULL)
732 addtobuf(argv, NULL);
733 execv(filtername, argv);
734 flog(LOG_WARNING, "could not exec filter %s: %s", filtername, strerror(errno));
737 insock = wrapsock(inpipe);
738 outsock = wrapsock(outpipe);
739 /* Really, really strange thing here - sometimes the kernel would
740 * return POLLIN on insock, even though it's a write-side
741 * pipe. The corresponding read on the pipe naturally returns
742 * EBADF, causing doldacond to think there's something wrong with
743 * the fd, and thus it closes it. Until I can find out whyever the
744 * kernel gives a POLLIN on the fd (if I can at all...), I'll just
745 * set ignread on insock for now. */
746 /* sockblock(insock, 1); */
747 transfer->filter = pid;
748 transfersetlocalend(transfer, insock);
749 getsock(transfer->filterout = outsock);
750 outsock->data = transfer;
751 outsock->readcb = (void (*)(struct socket *, void *))filterread;
762 struct transfer *transfer, *next;
765 for(transfer = transfers; transfer != NULL; transfer = transfer->next)
767 if((transfer->endpos >= 0) && (transfer->state == TRNS_MAIN) && (transfer->localend != NULL) && (transfer->localend->state == SOCK_EST) && (transfer->curpos >= transfer->endpos))
769 if((transfer->iface != NULL) && (transfer->iface->endofdata != NULL))
770 transfer->iface->endofdata(transfer, transfer->ifacedata);
771 closesock(transfer->localend);
775 for(transfer = transfers; transfer != NULL; transfer = next)
777 next = transfer->next;
780 transferdetach(transfer);
781 freetransfer(transfer);
788 static struct configvar myvars[] =
790 /** The maximum number of simultaneously permitted uploads. A
791 * common hub rule is that you will need at least as many slots as
792 * the number of hubs to which you are connected. */
793 {CONF_VAR_INT, "slots", {.num = 3}},
794 /** The TOS value to use for upload connections (see the TOS
795 * VALUES section). */
796 {CONF_VAR_INT, "ultos", {.num = SOCK_TOS_MAXTP}},
797 /** The TOS value to use for download connections (see the TOS
798 * VALUES section). */
799 {CONF_VAR_INT, "dltos", {.num = SOCK_TOS_MAXTP}},
800 /** The name of the filter script (see the FILES section for
801 * lookup information). */
802 {CONF_VAR_STRING, "filter", {.str = L"dc-filter"}},
803 /** If true, only one upload is allowed per remote peer. This
804 * option is still experimental, so it is recommended to leave it
806 {CONF_VAR_BOOL, "ulquota", {.num = 0}},
810 static struct module me =