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 transferiface *iface, void *data)
131 if(transfer->iface != NULL)
132 transferdetach(transfer);
133 transfer->iface = iface;
134 transfer->ifacedata = data;
137 void transferdetach(struct transfer *transfer)
139 if(transfer->iface != NULL)
141 transfer->iface->detach(transfer, transfer->ifacedata);
142 transfer->iface = NULL;
143 transfer->ifacedata = NULL;
147 struct transfer *finddownload(wchar_t *peerid)
149 struct transfer *transfer;
151 for(transfer = transfers; transfer != NULL; transfer = transfer->next)
153 if((transfer->dir == TRNSD_DOWN) && (transfer->iface == NULL) && !wcscmp(peerid, transfer->peerid))
159 struct transfer *hasupload(struct fnet *fnet, wchar_t *peerid)
161 struct transfer *transfer;
163 for(transfer = transfers; transfer != NULL; transfer = transfer->next)
165 if((transfer->dir == TRNSD_UP) && (transfer->fnet == fnet) && !wcscmp(transfer->peerid, peerid))
171 struct transfer *newupload(struct fnetnode *fn, struct fnet *fnet, wchar_t *nickid, struct transferiface *iface, void *data)
173 struct transfer *transfer;
175 transfer = newtransfer();
177 transfer->fnet = fnet;
179 transfer->fnet = fn->fnet;
180 transfer->peerid = swcsdup(nickid);
181 transfer->state = TRNS_HS;
182 transfer->dir = TRNSD_UP;
184 getfnetnode(transfer->fn = fn);
185 transferattach(transfer, iface, data);
186 linktransfer(transfer);
187 bumptransfer(transfer);
191 void linktransfer(struct transfer *transfer)
193 transfer->next = transfers;
194 transfer->prev = NULL;
195 if(transfers != NULL)
196 transfers->prev = transfer;
197 transfers = transfer;
198 GCBCHAINDOCB(newtransfercb, transfer);
201 void resettransfer(struct transfer *transfer)
203 if(transfer->dir == TRNSD_DOWN)
205 if(transfer->iface != NULL)
206 transferdetach(transfer);
207 killfilter(transfer);
208 transfersetstate(transfer, TRNS_WAITING);
209 transfersetactivity(transfer, L"reset");
214 struct transfer *findtransfer(int id)
216 struct transfer *transfer;
218 for(transfer = transfers; transfer != NULL; transfer = transfer->next)
220 if(transfer->id == id)
226 static void transexpire(int cancelled, struct transfer *transfer)
228 transfer->etimer = NULL;
230 bumptransfer(transfer);
232 transfer->timeout = 0;
235 static void transferread(struct socket *sk, struct transfer *transfer)
237 if(sockgetdatalen(sk) >= 65536)
239 if((transfer->iface != NULL) && (transfer->iface->gotdata != NULL))
240 transfer->iface->gotdata(transfer, transfer->ifacedata);
243 static void transferwrite(struct socket *sk, struct transfer *transfer)
245 if((transfer->iface != NULL) && (transfer->iface->wantdata != NULL))
246 transfer->iface->wantdata(transfer, transfer->ifacedata);
249 static void transfererr(struct socket *sk, int errno, struct transfer *transfer)
251 if((transfer->iface != NULL) && (transfer->iface->endofdata != NULL))
252 transfer->iface->endofdata(transfer, transfer->ifacedata);
255 void transferputdata(struct transfer *transfer, void *buf, size_t size)
257 time(&transfer->activity);
258 sockqueue(transfer->localend, buf, size);
259 transfer->curpos += size;
260 bytesdownload += size;
261 CBCHAINDOCB(transfer, trans_p, transfer);
264 void transferendofdata(struct transfer *transfer)
266 if(transfer->curpos >= transfer->size)
268 transfersetstate(transfer, TRNS_DONE);
269 transfer->localend->readcb = NULL;
270 transfer->localend->writecb = NULL;
271 transfer->localend->errcb = NULL;
272 putsock(transfer->localend);
273 transfer->localend = NULL;
275 resettransfer(transfer);
279 size_t transferdatasize(struct transfer *transfer)
281 return(sockqueuesize(transfer->localend));
284 void *transfergetdata(struct transfer *transfer, size_t *size)
288 if(transfer->localend == NULL)
290 transfer->localend->ignread = 0;
291 time(&transfer->activity);
292 if((buf = sockgetinbuf(transfer->localend, size)) == NULL)
294 if((transfer->endpos >= 0) && (transfer->curpos + *size >= transfer->endpos))
296 if((*size = transfer->endpos - transfer->curpos) == 0) {
300 buf = srealloc(buf, *size);
303 transfer->curpos += *size;
304 bytesupload += *size;
305 CBCHAINDOCB(transfer, trans_p, transfer);
309 void transferprepul(struct transfer *transfer, off_t size, off_t start, off_t end, struct socket *lesk)
311 transfersetsize(transfer, size);
312 transfer->curpos = start;
313 transfer->endpos = end;
315 transfersetlocalend(transfer, lesk);
318 void transferstartdl(struct transfer *transfer, struct socket *sk)
320 transfersetstate(transfer, TRNS_MAIN);
321 socksettos(sk, confgetint("transfer", "dltos"));
324 void transferstartul(struct transfer *transfer, struct socket *sk)
326 transfersetstate(transfer, TRNS_MAIN);
327 socksettos(sk, confgetint("transfer", "ultos"));
328 if(transfer->localend != NULL)
329 transfer->localend->ignread = 0;
332 void transfersetlocalend(struct transfer *transfer, struct socket *sk)
334 if(transfer->localend != NULL)
335 putsock(transfer->localend);
336 getsock(transfer->localend = sk);
338 sk->readcb = (void (*)(struct socket *, void *))transferread;
339 sk->writecb = (void (*)(struct socket *, void *))transferwrite;
340 sk->errcb = (void (*)(struct socket *, int, void *))transfererr;
343 static int tryreq(struct transfer *transfer)
346 struct fnetpeer *peer;
348 if((fn = transfer->fn) != NULL)
350 if(fn->state != FNN_EST)
355 peer = fnetfindpeer(fn, transfer->peerid);
358 for(fn = fnetnodes; fn != NULL; fn = fn->next)
360 if((fn->state == FNN_EST) && (fn->fnet == transfer->fnet) && ((peer = fnetfindpeer(fn, transfer->peerid)) != NULL))
366 time(&transfer->lastreq);
367 return(fn->fnet->reqconn(peer));
372 void trytransferbypeer(struct fnet *fnet, wchar_t *peerid)
374 struct transfer *transfer;
376 for(transfer = transfers; transfer != NULL; transfer = transfer->next)
378 if((transfer->dir == TRNSD_DOWN) && (transfer->state == TRNS_WAITING))
380 if((transfer->fnet == fnet) && !wcscmp(transfer->peerid, peerid))
382 if(!tryreq(transfer))
389 void bumptransfer(struct transfer *transfer)
393 if((now = time(NULL)) < transfer->timeout)
396 if(transfer->etimer == NULL)
397 transfer->etimer = timercallback(transfer->timeout, (void (*)(int, void *))transexpire, transfer);
400 if(transfer->etimer != NULL)
401 canceltimer(transfer->etimer);
402 switch(transfer->state)
405 transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 30), (void (*)(int, void *))transexpire, transfer);
406 if(now - transfer->lastreq > 30)
410 if(transfer->dir == TRNSD_UP)
412 if(now - transfer->activity < 60)
413 transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 60), (void (*)(int, void *))transexpire, transfer);
416 } else if(transfer->dir == TRNSD_DOWN) {
417 if(now - transfer->activity < 60)
418 transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 60), (void (*)(int, void *))transexpire, transfer);
420 resettransfer(transfer);
424 if(transfer->dir == TRNSD_UP)
426 if(now - transfer->activity < 300)
427 transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 300), (void (*)(int, void *))transexpire, transfer);
435 void transfersetactivity(struct transfer *transfer, wchar_t *desc)
437 time(&transfer->activity);
440 if(transfer->actdesc != NULL)
441 free(transfer->actdesc);
442 transfer->actdesc = swcsdup(desc);
444 bumptransfer(transfer);
445 CBCHAINDOCB(transfer, trans_act, transfer);
448 void transfersetstate(struct transfer *transfer, int newstate)
450 transfer->state = newstate;
451 if(transfer->etimer != NULL)
452 canceltimer(transfer->etimer);
453 transfersetactivity(transfer, NULL);
454 CBCHAINDOCB(transfer, trans_ac, transfer, L"state");
457 void transfersetnick(struct transfer *transfer, wchar_t *newnick)
459 if(transfer->peernick != NULL)
460 free(transfer->peernick);
461 transfer->peernick = swcsdup(newnick);
462 CBCHAINDOCB(transfer, trans_ac, transfer, L"nick");
465 void transfersetsize(struct transfer *transfer, off_t newsize)
467 transfer->size = newsize;
468 CBCHAINDOCB(transfer, trans_ac, transfer, L"size");
471 void transferseterror(struct transfer *transfer, int error)
473 transfer->error = error;
474 CBCHAINDOCB(transfer, trans_ac, transfer, L"error");
477 void transfersetpath(struct transfer *transfer, wchar_t *path)
479 if(transfer->path != NULL)
480 free(transfer->path);
481 transfer->path = swcsdup(path);
482 CBCHAINDOCB(transfer, trans_ac, transfer, L"path");
485 void transfersethash(struct transfer *transfer, struct hash *hash)
487 if(transfer->hash != NULL)
488 freehash(transfer->hash);
489 transfer->hash = hash;
490 CBCHAINDOCB(transfer, trans_ac, transfer, L"hash");
495 struct transfer *transfer;
498 slots = confgetint("transfer", "slots");
499 for(transfer = transfers; (transfer != NULL) && (slots > 0); transfer = transfer->next)
501 if((transfer->dir == TRNSD_UP) && (transfer->state == TRNS_MAIN) && !transfer->flags.b.minislot)
507 static void killfilter(struct transfer *transfer)
509 if(transfer->filter != -1)
511 kill(-transfer->filter, SIGHUP);
512 transfer->filter = -1;
514 if(transfer->localend)
516 transfer->localend->readcb = NULL;
517 transfer->localend->writecb = NULL;
518 transfer->localend->errcb = NULL;
519 putsock(transfer->localend);
520 transfer->localend = NULL;
522 if(transfer->filterout)
524 transfer->filterout->readcb = NULL;
525 putsock(transfer->filterout);
526 transfer->filterout = NULL;
528 if(transfer->filterbuf)
530 free(transfer->filterbuf);
531 transfer->filterbuf = NULL;
533 transfer->filterbufsize = transfer->filterbufdata = 0;
536 static void handletranscmd(struct transfer *transfer, wchar_t *cmd, wchar_t *arg)
538 if(!wcscmp(cmd, L"status")) {
541 if(transfer->exitstatus != NULL)
542 free(transfer->exitstatus);
543 transfer->exitstatus = swcsdup(arg);
547 static void filterread(struct socket *sk, struct transfer *transfer)
553 if((buf = sockgetinbuf(sk, &bufsize)) == NULL)
555 bufcat(transfer->filterbuf, buf, bufsize);
557 while((p = memchr(transfer->filterbuf, '\n', transfer->filterbufdata)) != NULL)
560 if((p2 = strchr(transfer->filterbuf, ' ')) != NULL)
562 if((cmd = icmbstowcs(transfer->filterbuf, NULL)) != NULL)
567 if((arg = icmbstowcs(p2, NULL)) == NULL)
568 flog(LOG_WARNING, "filter sent a string which could not be converted into the local charset: %s: %s", p2, strerror(errno));
570 handletranscmd(transfer, cmd, arg);
571 CBCHAINDOCB(transfer, trans_filterout, transfer, cmd, arg);
576 flog(LOG_WARNING, "filter sent a string which could not be converted into the local charset: %s: %s", transfer->filterbuf, strerror(errno));
578 memmove(transfer->filterbuf, p, transfer->filterbufdata -= (p - transfer->filterbuf));
582 static void filterexit(pid_t pid, int status, void *data)
584 struct transfer *transfer;
588 for(transfer = transfers; transfer != NULL; transfer = transfer->next)
590 if(transfer->filter == pid)
592 transfer->filter = -1;
593 killfilter(transfer);
594 fnet = transfer->fnet;
595 peerid = swcsdup(transfer->peerid);
596 if(WEXITSTATUS(status))
597 resettransfer(transfer);
599 freetransfer(transfer);
600 trytransferbypeer(fnet, peerid);
607 int forkfilter(struct transfer *transfer)
609 char *filtername, *filename, *peerid, *buf, *p;
611 struct passwd *pwent;
615 size_t argvsize, argvdata;
616 struct socket *insock, *outsock;
620 wfilename = fnfilebasename(transfer->path);
621 if(transfer->auth == NULL)
623 flog(LOG_WARNING, "tried to fork filter for transfer with NULL authhandle (tranfer %i)", transfer->id);
627 if((pwent = getpwuid(transfer->owner)) == NULL)
629 flog(LOG_WARNING, "no passwd entry for uid %i (found in transfer %i)", transfer->owner, transfer->id);
633 filtername = findfile("dc-filter", pwent->pw_dir, 0);
634 if(filtername == NULL)
635 filtername = findfile(icswcstombs(confgetstr("transfer", "filter"), NULL, NULL), NULL, 0);
636 if(filtername == NULL)
638 flog(LOG_WARNING, "could not find filter for user %s", pwent->pw_name);
642 if((filename = icwcstombs(wfilename, NULL)) == NULL)
644 if((buf = icwcstombs(wfilename, "UTF-8")) == NULL)
646 flog(LOG_WARNING, "could convert transfer filename to neither local charset nor UTF-8: %s", strerror(errno));
649 filename = sprintf2("utf8-%s", buf);
652 if((peerid = icwcstombs(transfer->peerid, NULL)) == NULL)
654 if((buf = icwcstombs(transfer->peerid, "UTF-8")) == NULL)
656 flog(LOG_WARNING, "could convert transfer peerid to neither local charset nor UTF-8: %s", strerror(errno));
660 peerid = sprintf2("utf8-%s", buf);
663 for(p = filename; *p; p++) {
666 else if((p == filename) && (*p == '.'))
669 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)
671 flog(LOG_WARNING, "could not fork session for filter for transfer %i: %s", transfer->id, strerror(errno));
677 argvsize = argvdata = 0;
678 buf = sprintf2("%ji", (intmax_t)transfer->size);
679 addtobuf(argv, filtername);
680 addtobuf(argv, filename);
682 addtobuf(argv, peerid);
685 if((buf = icwcstombs(unparsehash(transfer->hash), NULL)) != NULL)
687 /* XXX: I am very doubtful of this, but it can just as
688 * well be argued that all data should be presented as
689 * key-value pairs. */
690 addtobuf(argv, "hash");
693 flog(LOG_WARNING, "could not convert hash to local charset");
696 for(ta = transfer->args; ta != NULL; ta = ta->next)
698 if((rec = icwcstombs(ta->key, NULL)) == NULL)
700 if((val = icwcstombs(ta->val, NULL)) == NULL)
705 addtobuf(argv, NULL);
706 execv(filtername, argv);
707 flog(LOG_WARNING, "could not exec filter %s: %s", filtername, strerror(errno));
710 insock = wrapsock(inpipe);
711 outsock = wrapsock(outpipe);
712 /* Really, really strange thing here - sometimes the kernel would
713 * return POLLIN on insock, even though it's a write-side
714 * pipe. The corresponding read on the pipe naturally returns
715 * EBADF, causing doldacond to think there's something wrong with
716 * the fd, and thus it closes it. Until I can find out whyever the
717 * kernel gives a POLLIN on the fd (if I can at all...), I'll just
718 * set ignread on insock for now. */
720 transfer->filter = pid;
721 transfersetlocalend(transfer, insock);
722 getsock(transfer->filterout = outsock);
723 outsock->data = transfer;
724 outsock->readcb = (void (*)(struct socket *, void *))filterread;
735 struct transfer *transfer, *next;
737 for(transfer = transfers; transfer != NULL; transfer = transfer->next)
739 if((transfer->endpos >= 0) && (transfer->state == TRNS_MAIN) && (transfer->localend != NULL) && (transfer->localend->state == SOCK_EST) && (transfer->curpos >= transfer->endpos))
741 if((transfer->iface != NULL) && (transfer->iface->endofdata != NULL))
742 transfer->iface->endofdata(transfer, transfer->ifacedata);
743 closesock(transfer->localend);
746 for(transfer = transfers; transfer != NULL; transfer = next)
748 next = transfer->next;
751 transferdetach(transfer);
752 freetransfer(transfer);
759 static struct configvar myvars[] =
761 /** The maximum number of simultaneously permitted uploads. A
762 * common hub rule is that you will need at least as many slots as
763 * the number of hubs to which you are connected. */
764 {CONF_VAR_INT, "slots", {.num = 3}},
765 /** The TOS value to use for upload connections (see the TOS
766 * VALUES section). */
767 {CONF_VAR_INT, "ultos", {.num = SOCK_TOS_MAXTP}},
768 /** The TOS value to use for download connections (see the TOS
769 * VALUES section). */
770 {CONF_VAR_INT, "dltos", {.num = SOCK_TOS_MAXTP}},
771 /** The name of the filter script (see the FILES section for
772 * lookup information). */
773 {CONF_VAR_STRING, "filter", {.str = L"dc-filter"}},
774 /** If true, only one upload is allowed per remote peer. This
775 * option is still experimental, so it is recommended to leave it
777 {CONF_VAR_BOOL, "ulquota", {.num = 0}},
781 static struct module me =