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->curpos >= transfer->size) {
185 transfersetstate(transfer, TRNS_DONE);
186 if(transfer->localend != NULL) {
187 closesock(transfer->localend);
188 quitsock(transfer->localend);
189 transfer->localend = NULL;
192 if(transfer->dir == TRNSD_DOWN)
193 resettransfer(transfer);
194 else if(transfer->dir == TRNSD_UP)
199 void transferattach(struct transfer *transfer, struct socket *dpipe)
201 transferdetach(transfer);
202 getsock(transfer->datapipe = dpipe);
203 dpipe->readcb = (void (*)(struct socket *, void *))dataread;
204 dpipe->writecb = (void (*)(struct socket *, void *))datawrite;
205 dpipe->errcb = (void (*)(struct socket *, int, void *))dataerr;
206 dpipe->data = transfer;
209 void transferdetach(struct transfer *transfer)
211 if(transfer->datapipe != NULL) {
212 closesock(transfer->datapipe);
213 quitsock(transfer->datapipe);
215 transfer->datapipe = NULL;
218 struct transfer *finddownload(wchar_t *peerid)
220 struct transfer *transfer;
222 for(transfer = transfers; transfer != NULL; transfer = transfer->next)
224 if((transfer->dir == TRNSD_DOWN) && (transfer->datapipe == NULL) && !wcscmp(peerid, transfer->peerid))
230 struct transfer *hasupload(struct fnet *fnet, wchar_t *peerid)
232 struct transfer *transfer;
234 for(transfer = transfers; transfer != NULL; transfer = transfer->next)
236 if((transfer->dir == TRNSD_UP) && (transfer->fnet == fnet) && !wcscmp(transfer->peerid, peerid))
242 struct transfer *newupload(struct fnetnode *fn, struct fnet *fnet, wchar_t *nickid, struct socket *dpipe)
244 struct transfer *transfer;
246 transfer = newtransfer();
248 transfer->fnet = fnet;
250 transfer->fnet = fn->fnet;
251 transfer->peerid = swcsdup(nickid);
252 transfer->state = TRNS_HS;
253 transfer->dir = TRNSD_UP;
255 getfnetnode(transfer->fn = fn);
256 transferattach(transfer, dpipe);
257 linktransfer(transfer);
258 bumptransfer(transfer);
262 void linktransfer(struct transfer *transfer)
264 transfer->next = transfers;
265 transfer->prev = NULL;
266 if(transfers != NULL)
267 transfers->prev = transfer;
268 transfers = transfer;
269 GCBCHAINDOCB(newtransfercb, transfer);
272 void resettransfer(struct transfer *transfer)
274 if(transfer->dir == TRNSD_DOWN)
276 transferdetach(transfer);
277 killfilter(transfer);
278 transfersetstate(transfer, TRNS_WAITING);
279 transfersetactivity(transfer, L"reset");
284 struct transfer *findtransfer(int id)
286 struct transfer *transfer;
288 for(transfer = transfers; transfer != NULL; transfer = transfer->next)
290 if(transfer->id == id)
296 static void transexpire(int cancelled, struct transfer *transfer)
298 transfer->etimer = NULL;
300 bumptransfer(transfer);
302 transfer->timeout = 0;
305 void transferprepul(struct transfer *transfer, off_t size, off_t start, off_t end, struct socket *lesk)
307 transfersetsize(transfer, size);
308 transfer->curpos = start;
309 transfer->endpos = end;
310 transfersetlocalend(transfer, lesk);
313 void transferstartdl(struct transfer *transfer, struct socket *sk)
315 transfersetstate(transfer, TRNS_MAIN);
316 socksettos(sk, confgetint("transfer", "dltos"));
319 void transferstartul(struct transfer *transfer, struct socket *sk)
321 transfersetstate(transfer, TRNS_MAIN);
322 socksettos(sk, confgetint("transfer", "ultos"));
323 if(transfer->localend != NULL)
324 localread(transfer->localend, transfer);
327 void transfersetlocalend(struct transfer *transfer, struct socket *sk)
329 if(transfer->localend != NULL)
330 putsock(transfer->localend);
331 getsock(transfer->localend = sk);
333 sk->readcb = (void (*)(struct socket *, void *))localread;
334 sk->writecb = (void (*)(struct socket *, void *))localwrite;
335 sk->errcb = (void (*)(struct socket *, int, void *))localerr;
338 static int tryreq(struct transfer *transfer)
341 struct fnetpeer *peer;
343 if((fn = transfer->fn) != NULL)
345 if(fn->state != FNN_EST)
350 peer = fnetfindpeer(fn, transfer->peerid);
353 for(fn = fnetnodes; fn != NULL; fn = fn->next)
355 if((fn->state == FNN_EST) && (fn->fnet == transfer->fnet) && ((peer = fnetfindpeer(fn, transfer->peerid)) != NULL))
361 time(&transfer->lastreq);
362 return(fn->fnet->reqconn(peer));
367 void trytransferbypeer(struct fnet *fnet, wchar_t *peerid)
369 struct transfer *transfer;
371 for(transfer = transfers; transfer != NULL; transfer = transfer->next)
373 if((transfer->dir == TRNSD_DOWN) && (transfer->state == TRNS_WAITING))
375 if((transfer->fnet == fnet) && !wcscmp(transfer->peerid, peerid))
377 if(!tryreq(transfer))
384 void bumptransfer(struct transfer *transfer)
388 if((now = time(NULL)) < transfer->timeout)
391 if(transfer->etimer == NULL)
392 transfer->etimer = timercallback(transfer->timeout, (void (*)(int, void *))transexpire, transfer);
395 if(transfer->etimer != NULL)
396 canceltimer(transfer->etimer);
397 switch(transfer->state)
400 transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 30), (void (*)(int, void *))transexpire, transfer);
401 if(now - transfer->lastreq > 30)
405 if(transfer->dir == TRNSD_UP)
407 if(now - transfer->activity < 60)
408 transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 60), (void (*)(int, void *))transexpire, transfer);
411 } else if(transfer->dir == TRNSD_DOWN) {
412 if(now - transfer->activity < 60)
413 transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 60), (void (*)(int, void *))transexpire, transfer);
415 resettransfer(transfer);
419 if(transfer->dir == TRNSD_UP)
421 if(now - transfer->activity < 300)
422 transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 300), (void (*)(int, void *))transexpire, transfer);
430 void transfersetactivity(struct transfer *transfer, wchar_t *desc)
432 time(&transfer->activity);
435 if(transfer->actdesc != NULL)
436 free(transfer->actdesc);
437 transfer->actdesc = swcsdup(desc);
439 bumptransfer(transfer);
440 CBCHAINDOCB(transfer, trans_act, transfer);
443 void transfersetstate(struct transfer *transfer, int newstate)
445 transfer->state = newstate;
446 if(transfer->etimer != NULL)
447 canceltimer(transfer->etimer);
448 transfersetactivity(transfer, NULL);
449 CBCHAINDOCB(transfer, trans_ac, transfer, L"state");
452 void transfersetnick(struct transfer *transfer, wchar_t *newnick)
454 if(transfer->peernick != NULL)
455 free(transfer->peernick);
456 transfer->peernick = swcsdup(newnick);
457 CBCHAINDOCB(transfer, trans_ac, transfer, L"nick");
460 void transfersetsize(struct transfer *transfer, off_t newsize)
462 transfer->size = newsize;
463 CBCHAINDOCB(transfer, trans_ac, transfer, L"size");
466 void transferseterror(struct transfer *transfer, int error)
468 transfer->error = error;
469 CBCHAINDOCB(transfer, trans_ac, transfer, L"error");
472 void transfersetpath(struct transfer *transfer, wchar_t *path)
474 if(transfer->path != NULL)
475 free(transfer->path);
476 transfer->path = swcsdup(path);
477 CBCHAINDOCB(transfer, trans_ac, transfer, L"path");
480 void transfersethash(struct transfer *transfer, struct hash *hash)
482 if(transfer->hash != NULL)
483 freehash(transfer->hash);
484 transfer->hash = hash;
485 CBCHAINDOCB(transfer, trans_ac, transfer, L"hash");
490 struct transfer *transfer;
493 slots = confgetint("transfer", "slots");
494 for(transfer = transfers; (transfer != NULL) && (slots > 0); transfer = transfer->next)
496 if((transfer->dir == TRNSD_UP) && (transfer->state == TRNS_MAIN) && !transfer->flags.b.minislot)
502 static void killfilter(struct transfer *transfer)
504 if(transfer->filter != -1)
506 kill(-transfer->filter, SIGHUP);
507 transfer->filter = -1;
509 if(transfer->localend)
511 transfer->localend->readcb = NULL;
512 transfer->localend->writecb = NULL;
513 transfer->localend->errcb = NULL;
514 putsock(transfer->localend);
515 transfer->localend = NULL;
517 if(transfer->filterout)
519 transfer->filterout->readcb = NULL;
520 putsock(transfer->filterout);
521 transfer->filterout = NULL;
523 if(transfer->filterbuf)
525 free(transfer->filterbuf);
526 transfer->filterbuf = NULL;
528 transfer->filterbufsize = transfer->filterbufdata = 0;
531 static void handletranscmd(struct transfer *transfer, wchar_t *cmd, wchar_t *arg)
533 if(!wcscmp(cmd, L"status")) {
536 if(transfer->exitstatus != NULL)
537 free(transfer->exitstatus);
538 transfer->exitstatus = swcsdup(arg);
542 static void filterread(struct socket *sk, struct transfer *transfer)
548 if((buf = sockgetinbuf(sk, &bufsize)) == NULL)
550 bufcat(transfer->filterbuf, buf, bufsize);
552 while((p = memchr(transfer->filterbuf, '\n', transfer->filterbufdata)) != NULL)
555 if((p2 = strchr(transfer->filterbuf, ' ')) != NULL)
557 if((cmd = icmbstowcs(transfer->filterbuf, NULL)) != NULL)
562 if((arg = icmbstowcs(p2, NULL)) == NULL)
563 flog(LOG_WARNING, "filter sent a string which could not be converted into the local charset: %s: %s", p2, strerror(errno));
565 handletranscmd(transfer, cmd, arg);
566 CBCHAINDOCB(transfer, trans_filterout, transfer, cmd, arg);
571 flog(LOG_WARNING, "filter sent a string which could not be converted into the local charset: %s: %s", transfer->filterbuf, strerror(errno));
573 memmove(transfer->filterbuf, p, transfer->filterbufdata -= (p - transfer->filterbuf));
577 static void filterexit(pid_t pid, int status, void *data)
579 struct transfer *transfer;
583 for(transfer = transfers; transfer != NULL; transfer = transfer->next)
585 if(transfer->filter == pid)
587 transfer->filter = -1;
588 killfilter(transfer);
589 fnet = transfer->fnet;
590 peerid = swcsdup(transfer->peerid);
591 if(WEXITSTATUS(status))
592 resettransfer(transfer);
594 freetransfer(transfer);
595 trytransferbypeer(fnet, peerid);
602 int forkfilter(struct transfer *transfer)
604 char *filtername, *filename, *peerid, *buf, *p;
606 struct passwd *pwent;
610 size_t argvsize, argvdata;
611 struct socket *insock, *outsock;
615 wfilename = fnfilebasename(transfer->path);
616 if(transfer->auth == NULL)
618 flog(LOG_WARNING, "tried to fork filter for transfer with NULL authhandle (tranfer %i)", transfer->id);
622 if((pwent = getpwuid(transfer->owner)) == NULL)
624 flog(LOG_WARNING, "no passwd entry for uid %i (found in transfer %i)", transfer->owner, transfer->id);
628 filtername = findfile("dc-filter", pwent->pw_dir, 0);
629 if(filtername == NULL)
630 filtername = findfile(icswcstombs(confgetstr("transfer", "filter"), NULL, NULL), NULL, 0);
631 if(filtername == NULL)
633 flog(LOG_WARNING, "could not find filter for user %s", pwent->pw_name);
637 if((filename = icwcstombs(wfilename, NULL)) == NULL)
639 if((buf = icwcstombs(wfilename, "UTF-8")) == NULL)
641 flog(LOG_WARNING, "could convert transfer filename to neither local charset nor UTF-8: %s", strerror(errno));
644 filename = sprintf2("utf8-%s", buf);
647 if((peerid = icwcstombs(transfer->peerid, NULL)) == NULL)
649 if((buf = icwcstombs(transfer->peerid, "UTF-8")) == NULL)
651 flog(LOG_WARNING, "could convert transfer peerid to neither local charset nor UTF-8: %s", strerror(errno));
655 peerid = sprintf2("utf8-%s", buf);
658 for(p = filename; *p; p++) {
661 else if((p == filename) && (*p == '.'))
664 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)
666 flog(LOG_WARNING, "could not fork session for filter for transfer %i: %s", transfer->id, strerror(errno));
672 argvsize = argvdata = 0;
673 buf = sprintf2("%ji", (intmax_t)transfer->size);
674 addtobuf(argv, filtername);
675 addtobuf(argv, filename);
677 addtobuf(argv, peerid);
680 if((buf = icwcstombs(unparsehash(transfer->hash), NULL)) != NULL)
682 /* XXX: I am very doubtful of this, but it can just as
683 * well be argued that all data should be presented as
684 * key-value pairs. */
685 addtobuf(argv, "hash");
688 flog(LOG_WARNING, "could not convert hash to local charset");
691 for(ta = transfer->args; ta != NULL; ta = ta->next)
693 if((rec = icwcstombs(ta->key, NULL)) == NULL)
695 if((val = icwcstombs(ta->val, NULL)) == NULL)
700 addtobuf(argv, NULL);
701 execv(filtername, argv);
702 flog(LOG_WARNING, "could not exec filter %s: %s", filtername, strerror(errno));
705 insock = wrapsock(inpipe);
706 outsock = wrapsock(outpipe);
707 /* Really, really strange thing here - sometimes the kernel would
708 * return POLLIN on insock, even though it's a write-side
709 * pipe. The corresponding read on the pipe naturally returns
710 * EBADF, causing doldacond to think there's something wrong with
711 * the fd, and thus it closes it. Until I can find out whyever the
712 * kernel gives a POLLIN on the fd (if I can at all...), I'll just
713 * set ignread on insock for now. */
714 /* sockblock(insock, 1); */
715 transfer->filter = pid;
716 transfersetlocalend(transfer, insock);
717 getsock(transfer->filterout = outsock);
718 outsock->data = transfer;
719 outsock->readcb = (void (*)(struct socket *, void *))filterread;
730 struct transfer *transfer, *next;
733 for(transfer = transfers; transfer != NULL; transfer = transfer->next)
735 if((transfer->endpos >= 0) && (transfer->state == TRNS_MAIN) && (transfer->localend != NULL) && (transfer->localend->state == SOCK_EST) && (transfer->curpos >= transfer->endpos))
737 if((transfer->iface != NULL) && (transfer->iface->endofdata != NULL))
738 transfer->iface->endofdata(transfer, transfer->ifacedata);
739 closesock(transfer->localend);
743 for(transfer = transfers; transfer != NULL; transfer = next)
745 next = transfer->next;
748 transferdetach(transfer);
749 freetransfer(transfer);
756 static struct configvar myvars[] =
758 /** The maximum number of simultaneously permitted uploads. A
759 * common hub rule is that you will need at least as many slots as
760 * the number of hubs to which you are connected. */
761 {CONF_VAR_INT, "slots", {.num = 3}},
762 /** The TOS value to use for upload connections (see the TOS
763 * VALUES section). */
764 {CONF_VAR_INT, "ultos", {.num = SOCK_TOS_MAXTP}},
765 /** The TOS value to use for download connections (see the TOS
766 * VALUES section). */
767 {CONF_VAR_INT, "dltos", {.num = SOCK_TOS_MAXTP}},
768 /** The name of the filter script (see the FILES section for
769 * lookup information). */
770 {CONF_VAR_STRING, "filter", {.str = L"dc-filter"}},
771 /** If true, only one upload is allowed per remote peer. This
772 * option is still experimental, so it is recommended to leave it
774 {CONF_VAR_BOOL, "ulquota", {.num = 0}},
778 static struct module me =