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 void transferattach(struct transfer *transfer, struct socket *dpipe)
131 transferdetach(transfer);
132 getsock(transfer->datapipe = dpipe);
135 void transferdetach(struct transfer *transfer)
137 if(transfer->datapipe != NULL) {
138 closesock(transfer->datapipe);
139 putsock(transfer->datapipe);
141 transfer->datapipe = NULL;
144 struct transfer *finddownload(wchar_t *peerid)
146 struct transfer *transfer;
148 for(transfer = transfers; transfer != NULL; transfer = transfer->next)
150 if((transfer->dir == TRNSD_DOWN) && (transfer->datapipe == NULL) && !wcscmp(peerid, transfer->peerid))
156 struct transfer *hasupload(struct fnet *fnet, wchar_t *peerid)
158 struct transfer *transfer;
160 for(transfer = transfers; transfer != NULL; transfer = transfer->next)
162 if((transfer->dir == TRNSD_UP) && (transfer->fnet == fnet) && !wcscmp(transfer->peerid, peerid))
168 struct transfer *newupload(struct fnetnode *fn, struct fnet *fnet, wchar_t *nickid, struct socket *dpipe)
170 struct transfer *transfer;
172 transfer = newtransfer();
174 transfer->fnet = fnet;
176 transfer->fnet = fn->fnet;
177 transfer->peerid = swcsdup(nickid);
178 transfer->state = TRNS_HS;
179 transfer->dir = TRNSD_UP;
181 getfnetnode(transfer->fn = fn);
182 transferattach(transfer, dpipe);
183 linktransfer(transfer);
184 bumptransfer(transfer);
188 void linktransfer(struct transfer *transfer)
190 transfer->next = transfers;
191 transfer->prev = NULL;
192 if(transfers != NULL)
193 transfers->prev = transfer;
194 transfers = transfer;
195 GCBCHAINDOCB(newtransfercb, transfer);
198 void resettransfer(struct transfer *transfer)
200 if(transfer->dir == TRNSD_DOWN)
202 transferdetach(transfer);
203 killfilter(transfer);
204 transfersetstate(transfer, TRNS_WAITING);
205 transfersetactivity(transfer, L"reset");
210 struct transfer *findtransfer(int id)
212 struct transfer *transfer;
214 for(transfer = transfers; transfer != NULL; transfer = transfer->next)
216 if(transfer->id == id)
222 static void transexpire(int cancelled, struct transfer *transfer)
224 transfer->etimer = NULL;
226 bumptransfer(transfer);
228 transfer->timeout = 0;
231 static void localread(struct socket *sk, struct transfer *transfer)
236 if(transfer->datapipe != NULL) {
237 buf = sockgetinbuf(sk, &blen);
238 sockqueue(transfer->datapipe, buf, blen);
239 if(sockqueuesize(transfer->datapipe) >= 65536)
244 if(sockgetdatalen(sk) >= 65536)
249 static void localwrite(struct socket *sk, struct transfer *transfer)
257 static void localerr(struct socket *sk, int errno, struct transfer *transfer)
259 if((transfer->iface != NULL) && (transfer->iface->endofdata != NULL))
260 transfer->iface->endofdata(transfer, transfer->ifacedata);
263 void transferputdata(struct transfer *transfer, void *buf, size_t size)
265 time(&transfer->activity);
266 sockqueue(transfer->localend, buf, size);
267 transfer->curpos += size;
268 bytesdownload += size;
269 CBCHAINDOCB(transfer, trans_p, transfer);
272 void transferendofdata(struct transfer *transfer)
274 if(transfer->curpos >= transfer->size)
276 transfersetstate(transfer, TRNS_DONE);
277 transfer->localend->readcb = NULL;
278 transfer->localend->writecb = NULL;
279 transfer->localend->errcb = NULL;
280 putsock(transfer->localend);
281 transfer->localend = NULL;
283 resettransfer(transfer);
287 ssize_t transferdatasize(struct transfer *transfer)
289 return(sockqueueleft(transfer->localend));
292 void *transfergetdata(struct transfer *transfer, size_t *size)
296 if(transfer->localend == NULL)
298 time(&transfer->activity);
299 if((buf = sockgetinbuf(transfer->localend, size)) == NULL)
301 if((transfer->endpos >= 0) && (transfer->curpos + *size >= transfer->endpos))
303 if((*size = transfer->endpos - transfer->curpos) == 0) {
307 buf = srealloc(buf, *size);
310 transfer->curpos += *size;
311 bytesupload += *size;
312 CBCHAINDOCB(transfer, trans_p, transfer);
316 void transferprepul(struct transfer *transfer, off_t size, off_t start, off_t end, struct socket *lesk)
318 transfersetsize(transfer, size);
319 transfer->curpos = start;
320 transfer->endpos = end;
321 transfersetlocalend(transfer, lesk);
324 void transferstartdl(struct transfer *transfer, struct socket *sk)
326 transfersetstate(transfer, TRNS_MAIN);
327 socksettos(sk, confgetint("transfer", "dltos"));
330 void transferstartul(struct transfer *transfer, struct socket *sk)
332 transfersetstate(transfer, TRNS_MAIN);
333 socksettos(sk, confgetint("transfer", "ultos"));
334 if(transfer->localend != NULL)
335 transferread(transfer->localend, transfer);
338 void transfersetlocalend(struct transfer *transfer, struct socket *sk)
340 if(transfer->localend != NULL)
341 putsock(transfer->localend);
342 getsock(transfer->localend = sk);
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;
349 static int tryreq(struct transfer *transfer)
352 struct fnetpeer *peer;
354 if((fn = transfer->fn) != NULL)
356 if(fn->state != FNN_EST)
361 peer = fnetfindpeer(fn, transfer->peerid);
364 for(fn = fnetnodes; fn != NULL; fn = fn->next)
366 if((fn->state == FNN_EST) && (fn->fnet == transfer->fnet) && ((peer = fnetfindpeer(fn, transfer->peerid)) != NULL))
372 time(&transfer->lastreq);
373 return(fn->fnet->reqconn(peer));
378 void trytransferbypeer(struct fnet *fnet, wchar_t *peerid)
380 struct transfer *transfer;
382 for(transfer = transfers; transfer != NULL; transfer = transfer->next)
384 if((transfer->dir == TRNSD_DOWN) && (transfer->state == TRNS_WAITING))
386 if((transfer->fnet == fnet) && !wcscmp(transfer->peerid, peerid))
388 if(!tryreq(transfer))
395 void bumptransfer(struct transfer *transfer)
399 if((now = time(NULL)) < transfer->timeout)
402 if(transfer->etimer == NULL)
403 transfer->etimer = timercallback(transfer->timeout, (void (*)(int, void *))transexpire, transfer);
406 if(transfer->etimer != NULL)
407 canceltimer(transfer->etimer);
408 switch(transfer->state)
411 transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 30), (void (*)(int, void *))transexpire, transfer);
412 if(now - transfer->lastreq > 30)
416 if(transfer->dir == TRNSD_UP)
418 if(now - transfer->activity < 60)
419 transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 60), (void (*)(int, void *))transexpire, transfer);
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);
426 resettransfer(transfer);
430 if(transfer->dir == TRNSD_UP)
432 if(now - transfer->activity < 300)
433 transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 300), (void (*)(int, void *))transexpire, transfer);
441 void transfersetactivity(struct transfer *transfer, wchar_t *desc)
443 time(&transfer->activity);
446 if(transfer->actdesc != NULL)
447 free(transfer->actdesc);
448 transfer->actdesc = swcsdup(desc);
450 bumptransfer(transfer);
451 CBCHAINDOCB(transfer, trans_act, transfer);
454 void transfersetstate(struct transfer *transfer, int newstate)
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");
463 void transfersetnick(struct transfer *transfer, wchar_t *newnick)
465 if(transfer->peernick != NULL)
466 free(transfer->peernick);
467 transfer->peernick = swcsdup(newnick);
468 CBCHAINDOCB(transfer, trans_ac, transfer, L"nick");
471 void transfersetsize(struct transfer *transfer, off_t newsize)
473 transfer->size = newsize;
474 CBCHAINDOCB(transfer, trans_ac, transfer, L"size");
477 void transferseterror(struct transfer *transfer, int error)
479 transfer->error = error;
480 CBCHAINDOCB(transfer, trans_ac, transfer, L"error");
483 void transfersetpath(struct transfer *transfer, wchar_t *path)
485 if(transfer->path != NULL)
486 free(transfer->path);
487 transfer->path = swcsdup(path);
488 CBCHAINDOCB(transfer, trans_ac, transfer, L"path");
491 void transfersethash(struct transfer *transfer, struct hash *hash)
493 if(transfer->hash != NULL)
494 freehash(transfer->hash);
495 transfer->hash = hash;
496 CBCHAINDOCB(transfer, trans_ac, transfer, L"hash");
501 struct transfer *transfer;
504 slots = confgetint("transfer", "slots");
505 for(transfer = transfers; (transfer != NULL) && (slots > 0); transfer = transfer->next)
507 if((transfer->dir == TRNSD_UP) && (transfer->state == TRNS_MAIN) && !transfer->flags.b.minislot)
513 static void killfilter(struct transfer *transfer)
515 if(transfer->filter != -1)
517 kill(-transfer->filter, SIGHUP);
518 transfer->filter = -1;
520 if(transfer->localend)
522 transfer->localend->readcb = NULL;
523 transfer->localend->writecb = NULL;
524 transfer->localend->errcb = NULL;
525 putsock(transfer->localend);
526 transfer->localend = NULL;
528 if(transfer->filterout)
530 transfer->filterout->readcb = NULL;
531 putsock(transfer->filterout);
532 transfer->filterout = NULL;
534 if(transfer->filterbuf)
536 free(transfer->filterbuf);
537 transfer->filterbuf = NULL;
539 transfer->filterbufsize = transfer->filterbufdata = 0;
542 static void handletranscmd(struct transfer *transfer, wchar_t *cmd, wchar_t *arg)
544 if(!wcscmp(cmd, L"status")) {
547 if(transfer->exitstatus != NULL)
548 free(transfer->exitstatus);
549 transfer->exitstatus = swcsdup(arg);
553 static void filterread(struct socket *sk, struct transfer *transfer)
559 if((buf = sockgetinbuf(sk, &bufsize)) == NULL)
561 bufcat(transfer->filterbuf, buf, bufsize);
563 while((p = memchr(transfer->filterbuf, '\n', transfer->filterbufdata)) != NULL)
566 if((p2 = strchr(transfer->filterbuf, ' ')) != NULL)
568 if((cmd = icmbstowcs(transfer->filterbuf, NULL)) != NULL)
573 if((arg = icmbstowcs(p2, NULL)) == NULL)
574 flog(LOG_WARNING, "filter sent a string which could not be converted into the local charset: %s: %s", p2, strerror(errno));
576 handletranscmd(transfer, cmd, arg);
577 CBCHAINDOCB(transfer, trans_filterout, transfer, cmd, arg);
582 flog(LOG_WARNING, "filter sent a string which could not be converted into the local charset: %s: %s", transfer->filterbuf, strerror(errno));
584 memmove(transfer->filterbuf, p, transfer->filterbufdata -= (p - transfer->filterbuf));
588 static void filterexit(pid_t pid, int status, void *data)
590 struct transfer *transfer;
594 for(transfer = transfers; transfer != NULL; transfer = transfer->next)
596 if(transfer->filter == pid)
598 transfer->filter = -1;
599 killfilter(transfer);
600 fnet = transfer->fnet;
601 peerid = swcsdup(transfer->peerid);
602 if(WEXITSTATUS(status))
603 resettransfer(transfer);
605 freetransfer(transfer);
606 trytransferbypeer(fnet, peerid);
613 int forkfilter(struct transfer *transfer)
615 char *filtername, *filename, *peerid, *buf, *p;
617 struct passwd *pwent;
621 size_t argvsize, argvdata;
622 struct socket *insock, *outsock;
626 wfilename = fnfilebasename(transfer->path);
627 if(transfer->auth == NULL)
629 flog(LOG_WARNING, "tried to fork filter for transfer with NULL authhandle (tranfer %i)", transfer->id);
633 if((pwent = getpwuid(transfer->owner)) == NULL)
635 flog(LOG_WARNING, "no passwd entry for uid %i (found in transfer %i)", transfer->owner, transfer->id);
639 filtername = findfile("dc-filter", pwent->pw_dir, 0);
640 if(filtername == NULL)
641 filtername = findfile(icswcstombs(confgetstr("transfer", "filter"), NULL, NULL), NULL, 0);
642 if(filtername == NULL)
644 flog(LOG_WARNING, "could not find filter for user %s", pwent->pw_name);
648 if((filename = icwcstombs(wfilename, NULL)) == NULL)
650 if((buf = icwcstombs(wfilename, "UTF-8")) == NULL)
652 flog(LOG_WARNING, "could convert transfer filename to neither local charset nor UTF-8: %s", strerror(errno));
655 filename = sprintf2("utf8-%s", buf);
658 if((peerid = icwcstombs(transfer->peerid, NULL)) == NULL)
660 if((buf = icwcstombs(transfer->peerid, "UTF-8")) == NULL)
662 flog(LOG_WARNING, "could convert transfer peerid to neither local charset nor UTF-8: %s", strerror(errno));
666 peerid = sprintf2("utf8-%s", buf);
669 for(p = filename; *p; p++) {
672 else if((p == filename) && (*p == '.'))
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)
677 flog(LOG_WARNING, "could not fork session for filter for transfer %i: %s", transfer->id, strerror(errno));
683 argvsize = argvdata = 0;
684 buf = sprintf2("%ji", (intmax_t)transfer->size);
685 addtobuf(argv, filtername);
686 addtobuf(argv, filename);
688 addtobuf(argv, peerid);
691 if((buf = icwcstombs(unparsehash(transfer->hash), NULL)) != NULL)
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");
699 flog(LOG_WARNING, "could not convert hash to local charset");
702 for(ta = transfer->args; ta != NULL; ta = ta->next)
704 if((rec = icwcstombs(ta->key, NULL)) == NULL)
706 if((val = icwcstombs(ta->val, NULL)) == NULL)
711 addtobuf(argv, NULL);
712 execv(filtername, argv);
713 flog(LOG_WARNING, "could not exec filter %s: %s", filtername, strerror(errno));
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. */
725 /* sockblock(insock, 1); */
726 transfer->filter = pid;
727 transfersetlocalend(transfer, insock);
728 getsock(transfer->filterout = outsock);
729 outsock->data = transfer;
730 outsock->readcb = (void (*)(struct socket *, void *))filterread;
741 struct transfer *transfer, *next;
743 for(transfer = transfers; transfer != NULL; transfer = transfer->next)
745 if((transfer->endpos >= 0) && (transfer->state == TRNS_MAIN) && (transfer->localend != NULL) && (transfer->localend->state == SOCK_EST) && (transfer->curpos >= transfer->endpos))
747 if((transfer->iface != NULL) && (transfer->iface->endofdata != NULL))
748 transfer->iface->endofdata(transfer, transfer->ifacedata);
749 closesock(transfer->localend);
752 for(transfer = transfers; transfer != NULL; transfer = next)
754 next = transfer->next;
757 transferdetach(transfer);
758 freetransfer(transfer);
765 static struct configvar myvars[] =
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. */
770 {CONF_VAR_INT, "slots", {.num = 3}},
771 /** The TOS value to use for upload connections (see the TOS
772 * VALUES section). */
773 {CONF_VAR_INT, "ultos", {.num = SOCK_TOS_MAXTP}},
774 /** The TOS value to use for download connections (see the TOS
775 * VALUES section). */
776 {CONF_VAR_INT, "dltos", {.num = SOCK_TOS_MAXTP}},
777 /** The name of the filter script (see the FILES section for
778 * lookup information). */
779 {CONF_VAR_STRING, "filter", {.str = L"dc-filter"}},
780 /** If true, only one upload is allowed per remote peer. This
781 * option is still experimental, so it is recommended to leave it
783 {CONF_VAR_BOOL, "ulquota", {.num = 0}},
787 static struct module me =