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)
135 if((transfer->datapipe != NULL) && (sockqueueleft(transfer->datapipe) > 0)) {
136 buf = sockgetinbuf(sk, &blen);
137 if((transfer->endpos >= 0) && (transfer->localpos + blen > transfer->endpos))
138 blen = transfer->endpos - transfer->localpos;
139 sockqueue(transfer->datapipe, buf, blen);
141 time(&transfer->activity);
142 transfer->localpos += blen;
145 curpos = transfer->localpos - socktqueuesize(transfer->datapipe);
146 if(curpos != transfer->curpos) {
147 transfer->curpos = curpos;
148 CBCHAINDOCB(transfer, trans_p, transfer);
152 static void dataread(struct socket *sk, struct transfer *transfer)
157 if((transfer->localend != NULL) && (sockqueueleft(transfer->localend) > 0)) {
158 buf = sockgetinbuf(sk, &blen);
159 if((transfer->endpos >= 0) && (transfer->curpos + blen > transfer->endpos))
160 blen = transfer->endpos - transfer->curpos;
161 sockqueue(transfer->localend, buf, blen);
163 transfer->curpos += blen;
164 bytesdownload += blen;
165 CBCHAINDOCB(transfer, trans_p, transfer);
169 static void localwrite(struct socket *sk, struct transfer *transfer)
171 if(transfer->datapipe != NULL)
172 dataread(transfer->datapipe, transfer);
175 static void datawrite(struct socket *sk, struct transfer *transfer)
177 if(transfer->localend != NULL)
178 localread(transfer->localend, transfer);
181 static void localerr(struct socket *sk, int errno, struct transfer *transfer)
183 if(transfer->datapipe != NULL)
184 closesock(transfer->datapipe);
187 static void dataerr(struct socket *sk, int errno, struct transfer *transfer)
189 if(transfer->dir == TRNSD_DOWN) {
190 if(transfer->curpos >= transfer->size) {
191 transfersetstate(transfer, TRNS_DONE);
192 if(transfer->localend != NULL) {
193 closesock(transfer->localend);
194 quitsock(transfer->localend);
195 transfer->localend = NULL;
198 resettransfer(transfer);
200 } else if(transfer->dir == TRNSD_UP) {
205 void transferattach(struct transfer *transfer, struct socket *dpipe)
207 transferdetach(transfer);
208 getsock(transfer->datapipe = dpipe);
209 dpipe->readcb = (void (*)(struct socket *, void *))dataread;
210 dpipe->writecb = (void (*)(struct socket *, void *))datawrite;
211 dpipe->errcb = (void (*)(struct socket *, int, void *))dataerr;
212 dpipe->data = transfer;
215 void transferdetach(struct transfer *transfer)
217 if(transfer->datapipe != NULL) {
218 closesock(transfer->datapipe);
219 quitsock(transfer->datapipe);
221 transfer->datapipe = NULL;
224 struct transfer *finddownload(wchar_t *peerid)
226 struct transfer *transfer;
228 for(transfer = transfers; transfer != NULL; transfer = transfer->next)
230 if((transfer->dir == TRNSD_DOWN) && (transfer->datapipe == NULL) && !wcscmp(peerid, transfer->peerid))
236 struct transfer *hasupload(struct fnet *fnet, wchar_t *peerid)
238 struct transfer *transfer;
240 for(transfer = transfers; transfer != NULL; transfer = transfer->next)
242 if((transfer->dir == TRNSD_UP) && (transfer->fnet == fnet) && !wcscmp(transfer->peerid, peerid))
248 struct transfer *newupload(struct fnetnode *fn, struct fnet *fnet, wchar_t *nickid, struct socket *dpipe)
250 struct transfer *transfer;
252 transfer = newtransfer();
254 transfer->fnet = fnet;
256 transfer->fnet = fn->fnet;
257 transfer->peerid = swcsdup(nickid);
258 transfer->state = TRNS_HS;
259 transfer->dir = TRNSD_UP;
261 getfnetnode(transfer->fn = fn);
262 transferattach(transfer, dpipe);
263 linktransfer(transfer);
264 bumptransfer(transfer);
268 void linktransfer(struct transfer *transfer)
270 transfer->next = transfers;
271 transfer->prev = NULL;
272 if(transfers != NULL)
273 transfers->prev = transfer;
274 transfers = transfer;
275 GCBCHAINDOCB(newtransfercb, transfer);
278 void resettransfer(struct transfer *transfer)
280 if(transfer->dir == TRNSD_DOWN)
282 transferdetach(transfer);
283 killfilter(transfer);
284 transfersetstate(transfer, TRNS_WAITING);
285 transfersetactivity(transfer, L"reset");
290 struct transfer *findtransfer(int id)
292 struct transfer *transfer;
294 for(transfer = transfers; transfer != NULL; transfer = transfer->next)
296 if(transfer->id == id)
302 static void transexpire(int cancelled, struct transfer *transfer)
304 transfer->etimer = NULL;
306 bumptransfer(transfer);
308 transfer->timeout = 0;
311 void transferprepul(struct transfer *transfer, off_t size, off_t start, off_t end, struct socket *lesk)
313 transfersetsize(transfer, size);
314 transfer->curpos = transfer->localpos = start;
315 transfer->endpos = end;
316 transfersetlocalend(transfer, lesk);
319 void transferstartdl(struct transfer *transfer, struct socket *sk)
321 transfersetstate(transfer, TRNS_MAIN);
322 socksettos(sk, confgetint("transfer", "dltos"));
325 void transferstartul(struct transfer *transfer, struct socket *sk)
327 transfersetstate(transfer, TRNS_MAIN);
328 socksettos(sk, confgetint("transfer", "ultos"));
329 if(transfer->localend != NULL)
330 localread(transfer->localend, transfer);
333 void transfersetlocalend(struct transfer *transfer, struct socket *sk)
335 if(transfer->localend != NULL)
336 putsock(transfer->localend);
337 getsock(transfer->localend = sk);
339 sk->readcb = (void (*)(struct socket *, void *))localread;
340 sk->writecb = (void (*)(struct socket *, void *))localwrite;
341 sk->errcb = (void (*)(struct socket *, int, void *))localerr;
344 static int tryreq(struct transfer *transfer)
347 struct fnetpeer *peer;
349 if((fn = transfer->fn) != NULL)
351 if(fn->state != FNN_EST)
356 peer = fnetfindpeer(fn, transfer->peerid);
359 for(fn = fnetnodes; fn != NULL; fn = fn->next)
361 if((fn->state == FNN_EST) && (fn->fnet == transfer->fnet) && ((peer = fnetfindpeer(fn, transfer->peerid)) != NULL))
367 time(&transfer->lastreq);
368 return(fn->fnet->reqconn(peer));
373 void trytransferbypeer(struct fnet *fnet, wchar_t *peerid)
375 struct transfer *transfer;
377 for(transfer = transfers; transfer != NULL; transfer = transfer->next)
379 if((transfer->dir == TRNSD_DOWN) && (transfer->state == TRNS_WAITING))
381 if((transfer->fnet == fnet) && !wcscmp(transfer->peerid, peerid))
383 if(!tryreq(transfer))
390 void bumptransfer(struct transfer *transfer)
394 if((now = time(NULL)) < transfer->timeout)
397 if(transfer->etimer == NULL)
398 transfer->etimer = timercallback(transfer->timeout, (void (*)(int, void *))transexpire, transfer);
401 if(transfer->etimer != NULL)
402 canceltimer(transfer->etimer);
403 switch(transfer->state)
406 transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 30), (void (*)(int, void *))transexpire, transfer);
407 if(now - transfer->lastreq > 30)
411 if(transfer->dir == TRNSD_UP)
413 if(now - transfer->activity < 60)
414 transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 60), (void (*)(int, void *))transexpire, transfer);
417 } else if(transfer->dir == TRNSD_DOWN) {
418 if(now - transfer->activity < 60)
419 transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 60), (void (*)(int, void *))transexpire, transfer);
421 resettransfer(transfer);
425 if(transfer->dir == TRNSD_UP)
427 if(now - transfer->activity < 300)
428 transfer->etimer = timercallback(transfer->timeout = (time(NULL) + 300), (void (*)(int, void *))transexpire, transfer);
436 void transfersetactivity(struct transfer *transfer, wchar_t *desc)
438 time(&transfer->activity);
441 if(transfer->actdesc != NULL)
442 free(transfer->actdesc);
443 transfer->actdesc = swcsdup(desc);
445 bumptransfer(transfer);
446 CBCHAINDOCB(transfer, trans_act, transfer);
449 void transfersetstate(struct transfer *transfer, int newstate)
451 transfer->state = newstate;
452 if(transfer->etimer != NULL)
453 canceltimer(transfer->etimer);
454 transfersetactivity(transfer, NULL);
455 CBCHAINDOCB(transfer, trans_ac, transfer, L"state");
458 void transfersetnick(struct transfer *transfer, wchar_t *newnick)
460 if(transfer->peernick != NULL)
461 free(transfer->peernick);
462 transfer->peernick = swcsdup(newnick);
463 CBCHAINDOCB(transfer, trans_ac, transfer, L"nick");
466 void transfersetsize(struct transfer *transfer, off_t newsize)
468 transfer->size = newsize;
469 CBCHAINDOCB(transfer, trans_ac, transfer, L"size");
472 void transferseterror(struct transfer *transfer, int error)
474 transfer->error = error;
475 CBCHAINDOCB(transfer, trans_ac, transfer, L"error");
478 void transfersetpath(struct transfer *transfer, wchar_t *path)
480 if(transfer->path != NULL)
481 free(transfer->path);
482 transfer->path = swcsdup(path);
483 CBCHAINDOCB(transfer, trans_ac, transfer, L"path");
486 void transfersethash(struct transfer *transfer, struct hash *hash)
488 if(transfer->hash != NULL)
489 freehash(transfer->hash);
490 transfer->hash = hash;
491 CBCHAINDOCB(transfer, trans_ac, transfer, L"hash");
496 struct transfer *transfer;
499 slots = confgetint("transfer", "slots");
500 for(transfer = transfers; (transfer != NULL) && (slots > 0); transfer = transfer->next)
502 if((transfer->dir == TRNSD_UP) && (transfer->state == TRNS_MAIN) && !transfer->flags.b.minislot)
508 static void killfilter(struct transfer *transfer)
510 if(transfer->filter != -1)
512 kill(-transfer->filter, SIGHUP);
513 transfer->filter = -1;
515 if(transfer->localend)
517 transfer->localend->readcb = NULL;
518 transfer->localend->writecb = NULL;
519 transfer->localend->errcb = NULL;
520 putsock(transfer->localend);
521 transfer->localend = NULL;
523 if(transfer->filterout)
525 transfer->filterout->readcb = NULL;
526 putsock(transfer->filterout);
527 transfer->filterout = NULL;
529 if(transfer->filterbuf)
531 free(transfer->filterbuf);
532 transfer->filterbuf = NULL;
534 transfer->filterbufsize = transfer->filterbufdata = 0;
537 static void handletranscmd(struct transfer *transfer, wchar_t *cmd, wchar_t *arg)
539 if(!wcscmp(cmd, L"status")) {
542 if(transfer->exitstatus != NULL)
543 free(transfer->exitstatus);
544 transfer->exitstatus = swcsdup(arg);
548 static void filterread(struct socket *sk, struct transfer *transfer)
554 if((buf = sockgetinbuf(sk, &bufsize)) == NULL)
556 bufcat(transfer->filterbuf, buf, bufsize);
558 while((p = memchr(transfer->filterbuf, '\n', transfer->filterbufdata)) != NULL)
561 if((p2 = strchr(transfer->filterbuf, ' ')) != NULL)
563 if((cmd = icmbstowcs(transfer->filterbuf, NULL)) != NULL)
568 if((arg = icmbstowcs(p2, NULL)) == NULL)
569 flog(LOG_WARNING, "filter sent a string which could not be converted into the local charset: %s: %s", p2, strerror(errno));
571 handletranscmd(transfer, cmd, arg);
572 CBCHAINDOCB(transfer, trans_filterout, transfer, cmd, arg);
577 flog(LOG_WARNING, "filter sent a string which could not be converted into the local charset: %s: %s", transfer->filterbuf, strerror(errno));
579 memmove(transfer->filterbuf, p, transfer->filterbufdata -= (p - transfer->filterbuf));
583 static void filterexit(pid_t pid, int status, void *data)
585 struct transfer *transfer;
589 for(transfer = transfers; transfer != NULL; transfer = transfer->next)
591 if(transfer->filter == pid)
593 transfer->filter = -1;
594 killfilter(transfer);
595 fnet = transfer->fnet;
596 peerid = swcsdup(transfer->peerid);
597 if(WEXITSTATUS(status))
598 resettransfer(transfer);
600 freetransfer(transfer);
601 trytransferbypeer(fnet, peerid);
608 int forkfilter(struct transfer *transfer)
610 char *filtername, *filename, *peerid, *buf, *p;
612 struct passwd *pwent;
616 size_t argvsize, argvdata;
617 struct socket *insock, *outsock;
621 wfilename = fnfilebasename(transfer->path);
622 if(transfer->auth == NULL)
624 flog(LOG_WARNING, "tried to fork filter for transfer with NULL authhandle (tranfer %i)", transfer->id);
628 if((pwent = getpwuid(transfer->owner)) == NULL)
630 flog(LOG_WARNING, "no passwd entry for uid %i (found in transfer %i)", transfer->owner, transfer->id);
634 filtername = findfile("dc-filter", pwent->pw_dir, 0);
635 if(filtername == NULL)
636 filtername = findfile(icswcstombs(confgetstr("transfer", "filter"), NULL, NULL), NULL, 0);
637 if(filtername == NULL)
639 flog(LOG_WARNING, "could not find filter for user %s", pwent->pw_name);
643 if((filename = icwcstombs(wfilename, NULL)) == NULL)
645 if((buf = icwcstombs(wfilename, "UTF-8")) == NULL)
647 flog(LOG_WARNING, "could convert transfer filename to neither local charset nor UTF-8: %s", strerror(errno));
650 filename = sprintf2("utf8-%s", buf);
653 if((peerid = icwcstombs(transfer->peerid, NULL)) == NULL)
655 if((buf = icwcstombs(transfer->peerid, "UTF-8")) == NULL)
657 flog(LOG_WARNING, "could convert transfer peerid to neither local charset nor UTF-8: %s", strerror(errno));
661 peerid = sprintf2("utf8-%s", buf);
664 for(p = filename; *p; p++) {
667 else if((p == filename) && (*p == '.'))
670 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)
672 flog(LOG_WARNING, "could not fork session for filter for transfer %i: %s", transfer->id, strerror(errno));
678 argvsize = argvdata = 0;
679 buf = sprintf2("%ji", (intmax_t)transfer->size);
680 addtobuf(argv, filtername);
681 addtobuf(argv, filename);
683 addtobuf(argv, peerid);
686 if((buf = icwcstombs(unparsehash(transfer->hash), NULL)) != NULL)
688 /* XXX: I am very doubtful of this, but it can just as
689 * well be argued that all data should be presented as
690 * key-value pairs. */
691 addtobuf(argv, "hash");
694 flog(LOG_WARNING, "could not convert hash to local charset");
697 for(ta = transfer->args; ta != NULL; ta = ta->next)
699 if((rec = icwcstombs(ta->key, NULL)) == NULL)
701 if((val = icwcstombs(ta->val, NULL)) == NULL)
706 addtobuf(argv, NULL);
707 execv(filtername, argv);
708 flog(LOG_WARNING, "could not exec filter %s: %s", filtername, strerror(errno));
711 insock = wrapsock(inpipe);
712 outsock = wrapsock(outpipe);
713 /* Really, really strange thing here - sometimes the kernel would
714 * return POLLIN on insock, even though it's a write-side
715 * pipe. The corresponding read on the pipe naturally returns
716 * EBADF, causing doldacond to think there's something wrong with
717 * the fd, and thus it closes it. Until I can find out whyever the
718 * kernel gives a POLLIN on the fd (if I can at all...), I'll just
719 * set ignread on insock for now. */
720 /* sockblock(insock, 1); */
721 transfer->filter = pid;
722 transfersetlocalend(transfer, insock);
723 getsock(transfer->filterout = outsock);
724 outsock->data = transfer;
725 outsock->readcb = (void (*)(struct socket *, void *))filterread;
736 struct transfer *transfer, *next;
739 for(transfer = transfers; transfer != NULL; transfer = transfer->next)
741 if((transfer->endpos >= 0) && (transfer->state == TRNS_MAIN) && (transfer->localend != NULL) && (transfer->localend->state == SOCK_EST) && (transfer->curpos >= transfer->endpos))
743 if((transfer->iface != NULL) && (transfer->iface->endofdata != NULL))
744 transfer->iface->endofdata(transfer, transfer->ifacedata);
745 closesock(transfer->localend);
749 for(transfer = transfers; transfer != NULL; transfer = next)
751 next = transfer->next;
754 transferdetach(transfer);
755 freetransfer(transfer);
762 static struct configvar myvars[] =
764 /** The maximum number of simultaneously permitted uploads. A
765 * common hub rule is that you will need at least as many slots as
766 * the number of hubs to which you are connected. */
767 {CONF_VAR_INT, "slots", {.num = 3}},
768 /** The TOS value to use for upload connections (see the TOS
769 * VALUES section). */
770 {CONF_VAR_INT, "ultos", {.num = SOCK_TOS_MAXTP}},
771 /** The TOS value to use for download connections (see the TOS
772 * VALUES section). */
773 {CONF_VAR_INT, "dltos", {.num = SOCK_TOS_MAXTP}},
774 /** The name of the filter script (see the FILES section for
775 * lookup information). */
776 {CONF_VAR_STRING, "filter", {.str = L"dc-filter"}},
777 /** If true, only one upload is allowed per remote peer. This
778 * option is still experimental, so it is recommended to leave it
780 {CONF_VAR_BOOL, "ulquota", {.num = 0}},
784 static struct module me =