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);
137 time(&transfer->activity);
138 transfer->curpos += blen;
140 CBCHAINDOCB(transfer, trans_p, transfer);
144 static void dataread(struct socket *sk, struct transfer *transfer)
149 if((transfer->localend != NULL) && (sockqueueleft(transfer->localend) > 0)) {
150 buf = sockgetinbuf(sk, &blen);
151 sockqueue(transfer->localend, buf, blen);
152 transfer->curpos += blen;
153 bytesdownload += blen;
154 CBCHAINDOCB(transfer, trans_p, transfer);
158 static void localwrite(struct socket *sk, struct transfer *transfer)
160 if(transfer->datapipe != NULL)
161 dataread(transfer->datapipe, transfer);
164 static void datawrite(struct socket *sk, struct transfer *transfer)
166 if(transfer->localend != NULL)
167 localread(transfer->localend, transfer);
170 static void localerr(struct socket *sk, int errno, struct transfer *transfer)
172 if(transfer->datapipe != NULL)
173 closesock(transfer->datapipe);
176 static void dataerr(struct socket *sk, int errno, struct transfer *transfer)
178 if(transfer->curpos >= transfer->size) {
179 transfersetstate(transfer, TRNS_DONE);
180 closesock(transfer->localend);
181 quitsock(transfer->localend);
182 transfer->localend = NULL;
184 resettransfer(transfer);
188 void transferattach(struct transfer *transfer, struct socket *dpipe)
190 transferdetach(transfer);
191 getsock(transfer->datapipe = dpipe);
192 dpipe->readcb = (void (*)(struct socket *, void *))dataread;
193 dpipe->writecb = (void (*)(struct socket *, void *))datawrite;
194 dpipe->errcb = (void (*)(struct socket *, int, void *))dataerr;
195 dpipe->data = transfer;
198 void transferdetach(struct transfer *transfer)
200 if(transfer->datapipe != NULL) {
201 closesock(transfer->datapipe);
202 quitsock(transfer->datapipe);
204 transfer->datapipe = NULL;
207 struct transfer *finddownload(wchar_t *peerid)
209 struct transfer *transfer;
211 for(transfer = transfers; transfer != NULL; transfer = transfer->next)
213 if((transfer->dir == TRNSD_DOWN) && (transfer->datapipe == NULL) && !wcscmp(peerid, transfer->peerid))
219 struct transfer *hasupload(struct fnet *fnet, wchar_t *peerid)
221 struct transfer *transfer;
223 for(transfer = transfers; transfer != NULL; transfer = transfer->next)
225 if((transfer->dir == TRNSD_UP) && (transfer->fnet == fnet) && !wcscmp(transfer->peerid, peerid))
231 struct transfer *newupload(struct fnetnode *fn, struct fnet *fnet, wchar_t *nickid, struct socket *dpipe)
233 struct transfer *transfer;
235 transfer = newtransfer();
237 transfer->fnet = fnet;
239 transfer->fnet = fn->fnet;
240 transfer->peerid = swcsdup(nickid);
241 transfer->state = TRNS_HS;
242 transfer->dir = TRNSD_UP;
244 getfnetnode(transfer->fn = fn);
245 transferattach(transfer, dpipe);
246 linktransfer(transfer);
247 bumptransfer(transfer);
251 void linktransfer(struct transfer *transfer)
253 transfer->next = transfers;
254 transfer->prev = NULL;
255 if(transfers != NULL)
256 transfers->prev = transfer;
257 transfers = transfer;
258 GCBCHAINDOCB(newtransfercb, transfer);
261 void resettransfer(struct transfer *transfer)
263 if(transfer->dir == TRNSD_DOWN)
265 transferdetach(transfer);
266 killfilter(transfer);
267 transfersetstate(transfer, TRNS_WAITING);
268 transfersetactivity(transfer, L"reset");
273 struct transfer *findtransfer(int id)
275 struct transfer *transfer;
277 for(transfer = transfers; transfer != NULL; transfer = transfer->next)
279 if(transfer->id == id)
285 static void transexpire(int cancelled, struct transfer *transfer)
287 transfer->etimer = NULL;
289 bumptransfer(transfer);
291 transfer->timeout = 0;
294 void transferprepul(struct transfer *transfer, off_t size, off_t start, off_t end, struct socket *lesk)
296 transfersetsize(transfer, size);
297 transfer->curpos = start;
298 transfer->endpos = end;
299 transfersetlocalend(transfer, lesk);
302 void transferstartdl(struct transfer *transfer, struct socket *sk)
304 transfersetstate(transfer, TRNS_MAIN);
305 socksettos(sk, confgetint("transfer", "dltos"));
308 void transferstartul(struct transfer *transfer, struct socket *sk)
310 transfersetstate(transfer, TRNS_MAIN);
311 socksettos(sk, confgetint("transfer", "ultos"));
312 if(transfer->localend != NULL)
313 localread(transfer->localend, transfer);
316 void transfersetlocalend(struct transfer *transfer, struct socket *sk)
318 if(transfer->localend != NULL)
319 putsock(transfer->localend);
320 getsock(transfer->localend = sk);
322 sk->readcb = (void (*)(struct socket *, void *))localread;
323 sk->writecb = (void (*)(struct socket *, void *))localwrite;
324 sk->errcb = (void (*)(struct socket *, int, void *))localerr;
327 static int tryreq(struct transfer *transfer)
330 struct fnetpeer *peer;
332 if((fn = transfer->fn) != NULL)
334 if(fn->state != FNN_EST)
339 peer = fnetfindpeer(fn, transfer->peerid);
342 for(fn = fnetnodes; fn != NULL; fn = fn->next)
344 if((fn->state == FNN_EST) && (fn->fnet == transfer->fnet) && ((peer = fnetfindpeer(fn, transfer->peerid)) != NULL))
350 time(&transfer->lastreq);
351 return(fn->fnet->reqconn(peer));
356 void trytransferbypeer(struct fnet *fnet, wchar_t *peerid)
358 struct transfer *transfer;
360 for(transfer = transfers; transfer != NULL; transfer = transfer->next)
362 if((transfer->dir == TRNSD_DOWN) && (transfer->state == TRNS_WAITING))
364 if((transfer->fnet == fnet) && !wcscmp(transfer->peerid, peerid))
366 if(!tryreq(transfer))
373 void bumptransfer(struct transfer *transfer)
377 if((now = time(NULL)) < transfer->timeout)
380 if(transfer->etimer == NULL)
381 transfer->etimer = timercallback(transfer->timeout, (void (*)(int, void *))transexpire, transfer);
384 if(transfer->etimer != NULL)
385 canceltimer(transfer->etimer);
386 switch(transfer->state)
389 transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 30), (void (*)(int, void *))transexpire, transfer);
390 if(now - transfer->lastreq > 30)
394 if(transfer->dir == TRNSD_UP)
396 if(now - transfer->activity < 60)
397 transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 60), (void (*)(int, void *))transexpire, transfer);
400 } else if(transfer->dir == TRNSD_DOWN) {
401 if(now - transfer->activity < 60)
402 transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 60), (void (*)(int, void *))transexpire, transfer);
404 resettransfer(transfer);
408 if(transfer->dir == TRNSD_UP)
410 if(now - transfer->activity < 300)
411 transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 300), (void (*)(int, void *))transexpire, transfer);
419 void transfersetactivity(struct transfer *transfer, wchar_t *desc)
421 time(&transfer->activity);
424 if(transfer->actdesc != NULL)
425 free(transfer->actdesc);
426 transfer->actdesc = swcsdup(desc);
428 bumptransfer(transfer);
429 CBCHAINDOCB(transfer, trans_act, transfer);
432 void transfersetstate(struct transfer *transfer, int newstate)
434 transfer->state = newstate;
435 if(transfer->etimer != NULL)
436 canceltimer(transfer->etimer);
437 transfersetactivity(transfer, NULL);
438 CBCHAINDOCB(transfer, trans_ac, transfer, L"state");
441 void transfersetnick(struct transfer *transfer, wchar_t *newnick)
443 if(transfer->peernick != NULL)
444 free(transfer->peernick);
445 transfer->peernick = swcsdup(newnick);
446 CBCHAINDOCB(transfer, trans_ac, transfer, L"nick");
449 void transfersetsize(struct transfer *transfer, off_t newsize)
451 transfer->size = newsize;
452 CBCHAINDOCB(transfer, trans_ac, transfer, L"size");
455 void transferseterror(struct transfer *transfer, int error)
457 transfer->error = error;
458 CBCHAINDOCB(transfer, trans_ac, transfer, L"error");
461 void transfersetpath(struct transfer *transfer, wchar_t *path)
463 if(transfer->path != NULL)
464 free(transfer->path);
465 transfer->path = swcsdup(path);
466 CBCHAINDOCB(transfer, trans_ac, transfer, L"path");
469 void transfersethash(struct transfer *transfer, struct hash *hash)
471 if(transfer->hash != NULL)
472 freehash(transfer->hash);
473 transfer->hash = hash;
474 CBCHAINDOCB(transfer, trans_ac, transfer, L"hash");
479 struct transfer *transfer;
482 slots = confgetint("transfer", "slots");
483 for(transfer = transfers; (transfer != NULL) && (slots > 0); transfer = transfer->next)
485 if((transfer->dir == TRNSD_UP) && (transfer->state == TRNS_MAIN) && !transfer->flags.b.minislot)
491 static void killfilter(struct transfer *transfer)
493 if(transfer->filter != -1)
495 kill(-transfer->filter, SIGHUP);
496 transfer->filter = -1;
498 if(transfer->localend)
500 transfer->localend->readcb = NULL;
501 transfer->localend->writecb = NULL;
502 transfer->localend->errcb = NULL;
503 putsock(transfer->localend);
504 transfer->localend = NULL;
506 if(transfer->filterout)
508 transfer->filterout->readcb = NULL;
509 putsock(transfer->filterout);
510 transfer->filterout = NULL;
512 if(transfer->filterbuf)
514 free(transfer->filterbuf);
515 transfer->filterbuf = NULL;
517 transfer->filterbufsize = transfer->filterbufdata = 0;
520 static void handletranscmd(struct transfer *transfer, wchar_t *cmd, wchar_t *arg)
522 if(!wcscmp(cmd, L"status")) {
525 if(transfer->exitstatus != NULL)
526 free(transfer->exitstatus);
527 transfer->exitstatus = swcsdup(arg);
531 static void filterread(struct socket *sk, struct transfer *transfer)
537 if((buf = sockgetinbuf(sk, &bufsize)) == NULL)
539 bufcat(transfer->filterbuf, buf, bufsize);
541 while((p = memchr(transfer->filterbuf, '\n', transfer->filterbufdata)) != NULL)
544 if((p2 = strchr(transfer->filterbuf, ' ')) != NULL)
546 if((cmd = icmbstowcs(transfer->filterbuf, NULL)) != NULL)
551 if((arg = icmbstowcs(p2, NULL)) == NULL)
552 flog(LOG_WARNING, "filter sent a string which could not be converted into the local charset: %s: %s", p2, strerror(errno));
554 handletranscmd(transfer, cmd, arg);
555 CBCHAINDOCB(transfer, trans_filterout, transfer, cmd, arg);
560 flog(LOG_WARNING, "filter sent a string which could not be converted into the local charset: %s: %s", transfer->filterbuf, strerror(errno));
562 memmove(transfer->filterbuf, p, transfer->filterbufdata -= (p - transfer->filterbuf));
566 static void filterexit(pid_t pid, int status, void *data)
568 struct transfer *transfer;
572 for(transfer = transfers; transfer != NULL; transfer = transfer->next)
574 if(transfer->filter == pid)
576 transfer->filter = -1;
577 killfilter(transfer);
578 fnet = transfer->fnet;
579 peerid = swcsdup(transfer->peerid);
580 if(WEXITSTATUS(status))
581 resettransfer(transfer);
583 freetransfer(transfer);
584 trytransferbypeer(fnet, peerid);
591 int forkfilter(struct transfer *transfer)
593 char *filtername, *filename, *peerid, *buf, *p;
595 struct passwd *pwent;
599 size_t argvsize, argvdata;
600 struct socket *insock, *outsock;
604 wfilename = fnfilebasename(transfer->path);
605 if(transfer->auth == NULL)
607 flog(LOG_WARNING, "tried to fork filter for transfer with NULL authhandle (tranfer %i)", transfer->id);
611 if((pwent = getpwuid(transfer->owner)) == NULL)
613 flog(LOG_WARNING, "no passwd entry for uid %i (found in transfer %i)", transfer->owner, transfer->id);
617 filtername = findfile("dc-filter", pwent->pw_dir, 0);
618 if(filtername == NULL)
619 filtername = findfile(icswcstombs(confgetstr("transfer", "filter"), NULL, NULL), NULL, 0);
620 if(filtername == NULL)
622 flog(LOG_WARNING, "could not find filter for user %s", pwent->pw_name);
626 if((filename = icwcstombs(wfilename, NULL)) == NULL)
628 if((buf = icwcstombs(wfilename, "UTF-8")) == NULL)
630 flog(LOG_WARNING, "could convert transfer filename to neither local charset nor UTF-8: %s", strerror(errno));
633 filename = sprintf2("utf8-%s", buf);
636 if((peerid = icwcstombs(transfer->peerid, NULL)) == NULL)
638 if((buf = icwcstombs(transfer->peerid, "UTF-8")) == NULL)
640 flog(LOG_WARNING, "could convert transfer peerid to neither local charset nor UTF-8: %s", strerror(errno));
644 peerid = sprintf2("utf8-%s", buf);
647 for(p = filename; *p; p++) {
650 else if((p == filename) && (*p == '.'))
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("%ji", (intmax_t)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. */
703 /* sockblock(insock, 1); */
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;
722 for(transfer = transfers; transfer != NULL; transfer = transfer->next)
724 if((transfer->endpos >= 0) && (transfer->state == TRNS_MAIN) && (transfer->localend != NULL) && (transfer->localend->state == SOCK_EST) && (transfer->curpos >= transfer->endpos))
726 if((transfer->iface != NULL) && (transfer->iface->endofdata != NULL))
727 transfer->iface->endofdata(transfer, transfer->ifacedata);
728 closesock(transfer->localend);
732 for(transfer = transfers; transfer != NULL; transfer = next)
734 next = transfer->next;
737 transferdetach(transfer);
738 freetransfer(transfer);
745 static struct configvar myvars[] =
747 /** The maximum number of simultaneously permitted uploads. A
748 * common hub rule is that you will need at least as many slots as
749 * the number of hubs to which you are connected. */
750 {CONF_VAR_INT, "slots", {.num = 3}},
751 /** The TOS value to use for upload connections (see the TOS
752 * VALUES section). */
753 {CONF_VAR_INT, "ultos", {.num = SOCK_TOS_MAXTP}},
754 /** The TOS value to use for download connections (see the TOS
755 * VALUES section). */
756 {CONF_VAR_INT, "dltos", {.num = SOCK_TOS_MAXTP}},
757 /** The name of the filter script (see the FILES section for
758 * lookup information). */
759 {CONF_VAR_STRING, "filter", {.str = L"dc-filter"}},
760 /** If true, only one upload is allowed per remote peer. This
761 * option is still experimental, so it is recommended to leave it
763 {CONF_VAR_BOOL, "ulquota", {.num = 0}},
767 static struct module me =