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 if((transfer->endpos >= 0) && (transfer->curpos + blen > transfer->endpos))
137 blen = transfer->endpos - transfer->curpos;
138 sockqueue(transfer->datapipe, buf, blen);
140 time(&transfer->activity);
141 transfer->curpos += blen;
143 CBCHAINDOCB(transfer, trans_p, transfer);
147 static void dataread(struct socket *sk, struct transfer *transfer)
152 if((transfer->localend != NULL) && (sockqueueleft(transfer->localend) > 0)) {
153 buf = sockgetinbuf(sk, &blen);
154 if((transfer->endpos >= 0) && (transfer->curpos + blen > transfer->endpos))
155 blen = transfer->endpos - transfer->curpos;
156 sockqueue(transfer->localend, buf, blen);
158 transfer->curpos += blen;
159 bytesdownload += blen;
160 CBCHAINDOCB(transfer, trans_p, transfer);
164 static void localwrite(struct socket *sk, struct transfer *transfer)
166 if(transfer->datapipe != NULL)
167 dataread(transfer->datapipe, transfer);
170 static void datawrite(struct socket *sk, struct transfer *transfer)
172 if(transfer->localend != NULL)
173 localread(transfer->localend, transfer);
176 static void localerr(struct socket *sk, int errno, struct transfer *transfer)
178 if(transfer->datapipe != NULL)
179 closesock(transfer->datapipe);
182 static void dataerr(struct socket *sk, int errno, struct transfer *transfer)
184 if(transfer->dir == TRNSD_DOWN) {
185 if(transfer->curpos >= transfer->size) {
186 transfersetstate(transfer, TRNS_DONE);
187 if(transfer->localend != NULL) {
188 closesock(transfer->localend);
189 quitsock(transfer->localend);
190 transfer->localend = NULL;
193 resettransfer(transfer);
195 } else if(transfer->dir == TRNSD_UP) {
200 void transferattach(struct transfer *transfer, struct socket *dpipe)
202 transferdetach(transfer);
203 getsock(transfer->datapipe = dpipe);
204 dpipe->readcb = (void (*)(struct socket *, void *))dataread;
205 dpipe->writecb = (void (*)(struct socket *, void *))datawrite;
206 dpipe->errcb = (void (*)(struct socket *, int, void *))dataerr;
207 dpipe->data = transfer;
210 void transferdetach(struct transfer *transfer)
212 if(transfer->datapipe != NULL) {
213 closesock(transfer->datapipe);
214 quitsock(transfer->datapipe);
216 transfer->datapipe = NULL;
219 struct transfer *finddownload(wchar_t *peerid)
221 struct transfer *transfer;
223 for(transfer = transfers; transfer != NULL; transfer = transfer->next)
225 if((transfer->dir == TRNSD_DOWN) && (transfer->datapipe == NULL) && !wcscmp(peerid, transfer->peerid))
231 struct transfer *hasupload(struct fnet *fnet, wchar_t *peerid)
233 struct transfer *transfer;
235 for(transfer = transfers; transfer != NULL; transfer = transfer->next)
237 if((transfer->dir == TRNSD_UP) && (transfer->fnet == fnet) && !wcscmp(transfer->peerid, peerid))
243 struct transfer *newupload(struct fnetnode *fn, struct fnet *fnet, wchar_t *nickid, struct socket *dpipe)
245 struct transfer *transfer;
247 transfer = newtransfer();
249 transfer->fnet = fnet;
251 transfer->fnet = fn->fnet;
252 transfer->peerid = swcsdup(nickid);
253 transfer->state = TRNS_HS;
254 transfer->dir = TRNSD_UP;
256 getfnetnode(transfer->fn = fn);
257 transferattach(transfer, dpipe);
258 linktransfer(transfer);
259 bumptransfer(transfer);
263 void linktransfer(struct transfer *transfer)
265 transfer->next = transfers;
266 transfer->prev = NULL;
267 if(transfers != NULL)
268 transfers->prev = transfer;
269 transfers = transfer;
270 GCBCHAINDOCB(newtransfercb, transfer);
273 void resettransfer(struct transfer *transfer)
275 if(transfer->dir == TRNSD_DOWN)
277 transferdetach(transfer);
278 killfilter(transfer);
279 transfersetstate(transfer, TRNS_WAITING);
280 transfersetactivity(transfer, L"reset");
285 struct transfer *findtransfer(int id)
287 struct transfer *transfer;
289 for(transfer = transfers; transfer != NULL; transfer = transfer->next)
291 if(transfer->id == id)
297 static void transexpire(int cancelled, struct transfer *transfer)
299 transfer->etimer = NULL;
301 bumptransfer(transfer);
303 transfer->timeout = 0;
306 void transferprepul(struct transfer *transfer, off_t size, off_t start, off_t end, struct socket *lesk)
308 transfersetsize(transfer, size);
309 transfer->curpos = start;
310 transfer->endpos = end;
311 transfersetlocalend(transfer, lesk);
314 void transferstartdl(struct transfer *transfer, struct socket *sk)
316 transfersetstate(transfer, TRNS_MAIN);
317 socksettos(sk, confgetint("transfer", "dltos"));
320 void transferstartul(struct transfer *transfer, struct socket *sk)
322 transfersetstate(transfer, TRNS_MAIN);
323 socksettos(sk, confgetint("transfer", "ultos"));
324 if(transfer->localend != NULL)
325 localread(transfer->localend, transfer);
328 void transfersetlocalend(struct transfer *transfer, struct socket *sk)
330 if(transfer->localend != NULL)
331 putsock(transfer->localend);
332 getsock(transfer->localend = sk);
334 sk->readcb = (void (*)(struct socket *, void *))localread;
335 sk->writecb = (void (*)(struct socket *, void *))localwrite;
336 sk->errcb = (void (*)(struct socket *, int, void *))localerr;
339 static int tryreq(struct transfer *transfer)
342 struct fnetpeer *peer;
344 if((fn = transfer->fn) != NULL)
346 if(fn->state != FNN_EST)
351 peer = fnetfindpeer(fn, transfer->peerid);
354 for(fn = fnetnodes; fn != NULL; fn = fn->next)
356 if((fn->state == FNN_EST) && (fn->fnet == transfer->fnet) && ((peer = fnetfindpeer(fn, transfer->peerid)) != NULL))
362 time(&transfer->lastreq);
363 return(fn->fnet->reqconn(peer));
368 void trytransferbypeer(struct fnet *fnet, wchar_t *peerid)
370 struct transfer *transfer;
372 for(transfer = transfers; transfer != NULL; transfer = transfer->next)
374 if((transfer->dir == TRNSD_DOWN) && (transfer->state == TRNS_WAITING))
376 if((transfer->fnet == fnet) && !wcscmp(transfer->peerid, peerid))
378 if(!tryreq(transfer))
385 void bumptransfer(struct transfer *transfer)
389 if((now = time(NULL)) < transfer->timeout)
392 if(transfer->etimer == NULL)
393 transfer->etimer = timercallback(transfer->timeout, (void (*)(int, void *))transexpire, transfer);
396 if(transfer->etimer != NULL)
397 canceltimer(transfer->etimer);
398 switch(transfer->state)
401 transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 30), (void (*)(int, void *))transexpire, transfer);
402 if(now - transfer->lastreq > 30)
406 if(transfer->dir == TRNSD_UP)
408 if(now - transfer->activity < 60)
409 transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 60), (void (*)(int, void *))transexpire, transfer);
412 } else if(transfer->dir == TRNSD_DOWN) {
413 if(now - transfer->activity < 60)
414 transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 60), (void (*)(int, void *))transexpire, transfer);
416 resettransfer(transfer);
420 if(transfer->dir == TRNSD_UP)
422 if(now - transfer->activity < 300)
423 transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 300), (void (*)(int, void *))transexpire, transfer);
431 void transfersetactivity(struct transfer *transfer, wchar_t *desc)
433 time(&transfer->activity);
436 if(transfer->actdesc != NULL)
437 free(transfer->actdesc);
438 transfer->actdesc = swcsdup(desc);
440 bumptransfer(transfer);
441 CBCHAINDOCB(transfer, trans_act, transfer);
444 void transfersetstate(struct transfer *transfer, int newstate)
446 transfer->state = newstate;
447 if(transfer->etimer != NULL)
448 canceltimer(transfer->etimer);
449 transfersetactivity(transfer, NULL);
450 CBCHAINDOCB(transfer, trans_ac, transfer, L"state");
453 void transfersetnick(struct transfer *transfer, wchar_t *newnick)
455 if(transfer->peernick != NULL)
456 free(transfer->peernick);
457 transfer->peernick = swcsdup(newnick);
458 CBCHAINDOCB(transfer, trans_ac, transfer, L"nick");
461 void transfersetsize(struct transfer *transfer, off_t newsize)
463 transfer->size = newsize;
464 CBCHAINDOCB(transfer, trans_ac, transfer, L"size");
467 void transferseterror(struct transfer *transfer, int error)
469 transfer->error = error;
470 CBCHAINDOCB(transfer, trans_ac, transfer, L"error");
473 void transfersetpath(struct transfer *transfer, wchar_t *path)
475 if(transfer->path != NULL)
476 free(transfer->path);
477 transfer->path = swcsdup(path);
478 CBCHAINDOCB(transfer, trans_ac, transfer, L"path");
481 void transfersethash(struct transfer *transfer, struct hash *hash)
483 if(transfer->hash != NULL)
484 freehash(transfer->hash);
485 transfer->hash = hash;
486 CBCHAINDOCB(transfer, trans_ac, transfer, L"hash");
491 struct transfer *transfer;
494 slots = confgetint("transfer", "slots");
495 for(transfer = transfers; (transfer != NULL) && (slots > 0); transfer = transfer->next)
497 if((transfer->dir == TRNSD_UP) && (transfer->state == TRNS_MAIN) && !transfer->flags.b.minislot)
503 static void killfilter(struct transfer *transfer)
505 if(transfer->filter != -1)
507 kill(-transfer->filter, SIGHUP);
508 transfer->filter = -1;
510 if(transfer->localend)
512 transfer->localend->readcb = NULL;
513 transfer->localend->writecb = NULL;
514 transfer->localend->errcb = NULL;
515 putsock(transfer->localend);
516 transfer->localend = NULL;
518 if(transfer->filterout)
520 transfer->filterout->readcb = NULL;
521 putsock(transfer->filterout);
522 transfer->filterout = NULL;
524 if(transfer->filterbuf)
526 free(transfer->filterbuf);
527 transfer->filterbuf = NULL;
529 transfer->filterbufsize = transfer->filterbufdata = 0;
532 static void handletranscmd(struct transfer *transfer, wchar_t *cmd, wchar_t *arg)
534 if(!wcscmp(cmd, L"status")) {
537 if(transfer->exitstatus != NULL)
538 free(transfer->exitstatus);
539 transfer->exitstatus = swcsdup(arg);
543 static void filterread(struct socket *sk, struct transfer *transfer)
549 if((buf = sockgetinbuf(sk, &bufsize)) == NULL)
551 bufcat(transfer->filterbuf, buf, bufsize);
553 while((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", p2, strerror(errno));
566 handletranscmd(transfer, cmd, arg);
567 CBCHAINDOCB(transfer, trans_filterout, transfer, cmd, arg);
572 flog(LOG_WARNING, "filter sent a string which could not be converted into the local charset: %s: %s", transfer->filterbuf, strerror(errno));
574 memmove(transfer->filterbuf, p, transfer->filterbufdata -= (p - transfer->filterbuf));
578 static void filterexit(pid_t pid, int status, void *data)
580 struct transfer *transfer;
584 for(transfer = transfers; transfer != NULL; transfer = transfer->next)
586 if(transfer->filter == pid)
588 transfer->filter = -1;
589 killfilter(transfer);
590 fnet = transfer->fnet;
591 peerid = swcsdup(transfer->peerid);
592 if(WEXITSTATUS(status))
593 resettransfer(transfer);
595 freetransfer(transfer);
596 trytransferbypeer(fnet, peerid);
603 int forkfilter(struct transfer *transfer)
605 char *filtername, *filename, *peerid, *buf, *p;
607 struct passwd *pwent;
611 size_t argvsize, argvdata;
612 struct socket *insock, *outsock;
616 wfilename = fnfilebasename(transfer->path);
617 if(transfer->auth == NULL)
619 flog(LOG_WARNING, "tried to fork filter for transfer with NULL authhandle (tranfer %i)", transfer->id);
623 if((pwent = getpwuid(transfer->owner)) == NULL)
625 flog(LOG_WARNING, "no passwd entry for uid %i (found in transfer %i)", transfer->owner, transfer->id);
629 filtername = findfile("dc-filter", pwent->pw_dir, 0);
630 if(filtername == NULL)
631 filtername = findfile(icswcstombs(confgetstr("transfer", "filter"), NULL, NULL), NULL, 0);
632 if(filtername == NULL)
634 flog(LOG_WARNING, "could not find filter for user %s", pwent->pw_name);
638 if((filename = icwcstombs(wfilename, NULL)) == NULL)
640 if((buf = icwcstombs(wfilename, "UTF-8")) == NULL)
642 flog(LOG_WARNING, "could convert transfer filename to neither local charset nor UTF-8: %s", strerror(errno));
645 filename = sprintf2("utf8-%s", buf);
648 if((peerid = icwcstombs(transfer->peerid, NULL)) == NULL)
650 if((buf = icwcstombs(transfer->peerid, "UTF-8")) == NULL)
652 flog(LOG_WARNING, "could convert transfer peerid to neither local charset nor UTF-8: %s", strerror(errno));
656 peerid = sprintf2("utf8-%s", buf);
659 for(p = filename; *p; p++) {
662 else if((p == filename) && (*p == '.'))
665 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)
667 flog(LOG_WARNING, "could not fork session for filter for transfer %i: %s", transfer->id, strerror(errno));
673 argvsize = argvdata = 0;
674 buf = sprintf2("%ji", (intmax_t)transfer->size);
675 addtobuf(argv, filtername);
676 addtobuf(argv, filename);
678 addtobuf(argv, peerid);
681 if((buf = icwcstombs(unparsehash(transfer->hash), NULL)) != NULL)
683 /* XXX: I am very doubtful of this, but it can just as
684 * well be argued that all data should be presented as
685 * key-value pairs. */
686 addtobuf(argv, "hash");
689 flog(LOG_WARNING, "could not convert hash to local charset");
692 for(ta = transfer->args; ta != NULL; ta = ta->next)
694 if((rec = icwcstombs(ta->key, NULL)) == NULL)
696 if((val = icwcstombs(ta->val, NULL)) == NULL)
701 addtobuf(argv, NULL);
702 execv(filtername, argv);
703 flog(LOG_WARNING, "could not exec filter %s: %s", filtername, strerror(errno));
706 insock = wrapsock(inpipe);
707 outsock = wrapsock(outpipe);
708 /* Really, really strange thing here - sometimes the kernel would
709 * return POLLIN on insock, even though it's a write-side
710 * pipe. The corresponding read on the pipe naturally returns
711 * EBADF, causing doldacond to think there's something wrong with
712 * the fd, and thus it closes it. Until I can find out whyever the
713 * kernel gives a POLLIN on the fd (if I can at all...), I'll just
714 * set ignread on insock for now. */
715 /* sockblock(insock, 1); */
716 transfer->filter = pid;
717 transfersetlocalend(transfer, insock);
718 getsock(transfer->filterout = outsock);
719 outsock->data = transfer;
720 outsock->readcb = (void (*)(struct socket *, void *))filterread;
731 struct transfer *transfer, *next;
734 for(transfer = transfers; transfer != NULL; transfer = transfer->next)
736 if((transfer->endpos >= 0) && (transfer->state == TRNS_MAIN) && (transfer->localend != NULL) && (transfer->localend->state == SOCK_EST) && (transfer->curpos >= transfer->endpos))
738 if((transfer->iface != NULL) && (transfer->iface->endofdata != NULL))
739 transfer->iface->endofdata(transfer, transfer->ifacedata);
740 closesock(transfer->localend);
744 for(transfer = transfers; transfer != NULL; transfer = next)
746 next = transfer->next;
749 transferdetach(transfer);
750 freetransfer(transfer);
757 static struct configvar myvars[] =
759 /** The maximum number of simultaneously permitted uploads. A
760 * common hub rule is that you will need at least as many slots as
761 * the number of hubs to which you are connected. */
762 {CONF_VAR_INT, "slots", {.num = 3}},
763 /** The TOS value to use for upload connections (see the TOS
764 * VALUES section). */
765 {CONF_VAR_INT, "ultos", {.num = SOCK_TOS_MAXTP}},
766 /** The TOS value to use for download connections (see the TOS
767 * VALUES section). */
768 {CONF_VAR_INT, "dltos", {.num = SOCK_TOS_MAXTP}},
769 /** The name of the filter script (see the FILES section for
770 * lookup information). */
771 {CONF_VAR_STRING, "filter", {.str = L"dc-filter"}},
772 /** If true, only one upload is allowed per remote peer. This
773 * option is still experimental, so it is recommended to leave it
775 {CONF_VAR_BOOL, "ulquota", {.num = 0}},
779 static struct module me =