Dolda2000 GitWeb / doldaconnect.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Add trytransferbypeer.
[doldaconnect.git] / daemon / fnet-dc.c
CommitLineData
d3372da9 1/*
2 * Dolda Connect - Modular multiuser Direct Connect-style client
3 * Copyright (C) 2004 Fredrik Tolf (fredrik@dolda2000.com)
4 *
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.
9 *
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.
14 *
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
18*/
19#include <stdlib.h>
20#include <stdio.h>
21#include <wchar.h>
22#include <malloc.h>
23#include <unistd.h>
24#include <fcntl.h>
25#include <string.h>
26#include <netinet/in.h>
27#include <arpa/inet.h>
28#include <alloca.h>
29#include <wctype.h>
30#include <time.h>
31#include <errno.h>
32#include <bzlib.h>
33#include <zlib.h>
34#include <sys/stat.h>
35
36#ifdef HAVE_CONFIG_H
37#include <config.h>
38#endif
39#include "filenet.h"
40#include "log.h"
41#include "module.h"
42#include "utils.h"
43#include "client.h"
44#include "transfer.h"
45#include "sysevents.h"
46#include "net.h"
9a2d6cb8 47#include "tiger.h"
d3372da9 48
49/*
50 * The Direct Connect protocol is extremely ugly. Thus, this code must
51 * also be a bit ugly in certain places. Please forgive me. =/
52 *
53 * This also means that there might be some pieces of the code that
54 * look completely illogical to you, and you think that you may make
55 * them much neater/better. However, in many cases it might just be
56 * that it's required to cope with some oddity of the protocol, such
57 * as the amazingly ugly delayed key response in the peer protocol.
58 */
59
60/* I assume this is the correct character set to use for DC,
61 * considering it was developed without i18n support under Windows */
62#define DCCHARSET "windows-1252"
63
64#ifdef DCPP_MASQUERADE
65/*
66 * I honestly don't want to pretend being a client that I'm not, but
67 * there are so many hubs that simply do not accept any clients
68 * outside their whitelists, for no obvious reasons, so I feel that I
69 * am left with little choice. Anyhow, as long as I actually support
70 * all the features that my faked DC++ version does, there should be
71 * very little harm done.
72 */
73#define DCIDTAG "++"
74#define DCIDTAGV "0.674"
75#define DCIDFULL "DC++ 0.674"
76#else
77#define DCIDTAG "Dolda"
78#define DCIDTAGV VERSION
79#define DCIDFULL "DoldaConnect " VERSION
80#endif
81
82#define PEER_CMD 0
9a2d6cb8 83#define PEER_STOP 1
84#define PEER_TRNS 2
85#define PEER_SYNC 3
86#define PEER_TTHL 4
d3372da9 87
88#define CPRS_NONE 0
89#define CPRS_ZLIB 1
90
91struct command
92{
93 char *name;
94 void (*handler)(struct socket *sk, void *data, char *cmd, char *args);
9a2d6cb8 95 int stop;
d3372da9 96};
97
98struct qcommand
99{
100 struct qcommand *next;
101 char *string;
102};
103
104struct dchub
105{
106 char *inbuf;
107 size_t inbufdata, inbufsize;
108 struct qcommand *queue;
fcd0627b 109 int extended;
d3372da9 110 char *nativename;
111 char *nativenick;
112};
113
114struct dcexppeer
115{
116 struct dcexppeer *next, *prev;
117 char *nick;
118 struct fnetnode *fn;
119 struct timer *expire;
120};
121
122struct dcpeer
123{
124 struct dcpeer *next, *prev;
125 struct socket *sk;
126 struct fnetnode *fn;
127 char *inbuf;
128 size_t inbufdata, inbufsize;
9a2d6cb8 129 size_t curread, totalsize;
d3372da9 130 int freeing;
131 struct qcommand *queue;
132 struct transfer *transfer;
133 int state;
134 int ptclose; /* Close after transfer is complete */
135 int accepted; /* If false, we connected, otherwise, we accepted */
136 int extended;
137 int direction; /* Using the constants from transfer.h */
138 int compress;
9a2d6cb8 139 int hascurpos, notthl;
140 struct tigertreehash tth;
d3372da9 141 void *cprsdata;
d3372da9 142 char *key;
143 char *nativename;
144 char **supports;
145 wchar_t *wcsname;
146};
147
148static struct fnet dcnet;
149static struct transferiface dctransfer;
150static struct socket *udpsock = NULL;
151static struct socket *tcpsock = NULL;
152static struct dcpeer *peers = NULL;
153int numdcpeers = 0;
154static struct dcexppeer *expected = NULL;
155static char *hmlistname = NULL;
156static char *xmllistname = NULL;
157static char *xmlbz2listname = NULL;
158
159static void peerconnect(struct socket *sk, int err, struct fnetnode *fn);
160static void freedcpeer(struct dcpeer *peer);
161static void transread(struct socket *sk, struct dcpeer *peer);
162static void transerr(struct socket *sk, int err, struct dcpeer *peer);
163static void transwrite(struct socket *sk, struct dcpeer *peer);
164static void updatehmlist(void);
165static void updatexmllist(void);
166static void updatexmlbz2list(void);
9a2d6cb8 167static void requestfile(struct dcpeer *peer);
d3372da9 168
169static int reservedchar(unsigned char c)
170{
171 return((c == 0) || (c == 5) || (c == 124) || (c == 96) || (c == 126) || (c == 36));
172}
173
174/* Oh, how I despise having to do this... */
175static char *dcmakekey(char *lock)
176{
177 int i, len, offset;
178 char *buf, *key;
179 char save;
180
181 buf = smalloc(strlen(lock));
182 save = 5;
183 len = 0;
184 for(i = 0; lock[i]; i++)
185 {
186 buf[i] = lock[i] ^ save;
187 buf[i] = ((buf[i] & 0x0F) << 4) | ((buf[i] & 0xF0) >> 4);
188 save = lock[i];
189 if((i != 0) && reservedchar(buf[i]))
190 len += 10;
191 else
192 len++;
193 }
194 buf[0] ^= buf[i - 1];
195 if(reservedchar(buf[0]))
196 len += 10;
197 else
198 len++;
199 key = smalloc(len + 1);
200 offset = 0;
201 for(i = 0; lock[i] != 0; i++)
202 {
203 if(reservedchar(buf[i]))
204 offset += sprintf(key + offset, "/%%DCN%03i%%/", buf[i]);
205 else
206 key[offset++] = buf[i];
207 }
208 key[offset] = 0;
209 free(buf);
210 return(key);
211}
212
9a2d6cb8 213static char *pathnmdc2adc(char *path)
214{
215 char *ret;
216 size_t retsize, retdata;
217
218 if(!strcmp(path, "files.xml") || !strcmp(path, "files.xml.bz2") || !strcmp(path, "MyList.DcLst"))
219 return(sstrdup(path));
220 ret = NULL;
221 retsize = retdata = 0;
222 addtobuf(ret, '/');
223 for(; *path; path++)
224 {
225 if(*path == '\\')
226 addtobuf(ret, '/');
227 else
228 addtobuf(ret, *path);
229 }
230 addtobuf(ret, 0);
231 return(ret);
232}
233
234static int isdchash(struct hash *hash)
235{
236 if(wcscmp(hash->algo, L"TTH"))
237 return(0);
238 if(hash->len != 24)
239 return(0);
240 return(1);
241}
242
243static int supports(struct dcpeer *peer, char *cap)
244{
245 char **p;
246
247 if(peer->supports == NULL)
248 return(0);
249 for(p = peer->supports; *p != NULL; p++)
250 {
251 if(!strcasecmp(*p, cap))
252 return(1);
253 }
254 return(0);
255}
256
d3372da9 257static void endcompress(struct dcpeer *peer)
258{
259 if(peer->compress == CPRS_ZLIB)
260 {
261 deflateEnd(peer->cprsdata);
262 free(peer->cprsdata);
263 }
264 peer->compress = CPRS_NONE;
265}
266
267static void initcompress(struct dcpeer *peer, int algo)
268{
269 int ret;
270
271 endcompress(peer);
272 peer->compress = algo;
273 if(algo == CPRS_ZLIB)
274 {
275 peer->cprsdata = smalloc(sizeof(z_stream));
276 memset(peer->cprsdata, 0, sizeof(z_stream));
277 if((ret = deflateInit(peer->cprsdata, 3)) != Z_OK)
278 {
279 flog(LOG_CRIT, "Aiya! zlib refuses to init (%i)!", ret);
280 abort();
281 }
282 }
283}
284
285static void unquote(wchar_t *in)
286{
287 wchar_t *p, *p2, nc;
288
289 for(p = in; *p != L'\0'; p++)
290 {
291 if(*p == L'&')
292 {
293 for(p2 = p + 1; (*p2 != L'\0') && (*p2 != L';') && (*p2 != L'&'); p2++);
294 if(*p2 == L'&')
295 continue;
296 if(*p2 == L'\0')
297 return;
298 *p2 = L'\0';
299 nc = L'\0';
300 if(!wcscmp(p + 1, L"amp"))
301 {
302 nc = L'&';
303 } else if(p[1] == L'#') {
304 nc = ucptowc(wcstol(p + 2, NULL, 10));
305 }
306 if(nc == L'\0')
307 {
308 *p2 = L';';
309 p = p2;
310 continue;
311 }
312 *p = nc;
313 memmove(p + 1, p2 + 1, (wcslen(p2 + 1) + 1) * sizeof(wchar_t));
314 }
315 }
316}
317
318static void freeexppeer(struct dcexppeer *ep)
319{
320 if(ep->next != NULL)
321 ep->next->prev = ep->prev;
322 if(ep->prev != NULL)
323 ep->prev->next = ep->next;
324 if(ep == expected)
325 expected = ep->next;
326 free(ep->nick);
327 putfnetnode(ep->fn);
328 if(ep->expire != NULL)
329 canceltimer(ep->expire);
330 free(ep);
331}
332
333static void exppeerexpire(int cancelled, struct dcexppeer *ep)
334{
335 ep->expire = NULL;
336 if(!cancelled)
337 freeexppeer(ep);
338}
339
340static struct dcexppeer *expectpeer(char *nick, struct fnetnode *fn)
341{
342 struct dcexppeer *ep;
343
344 ep = smalloc(sizeof(*ep));
345 ep->nick = sstrdup(nick);
346 getfnetnode(ep->fn = fn);
347 ep->expire = timercallback(ntime() + 300, (void (*)(int, void *))exppeerexpire, ep);
348 ep->next = expected;
349 ep->prev = NULL;
350 if(expected != NULL)
351 expected->prev = ep;
352 expected = ep;
353 return(ep);
354}
355
356static struct qcommand *newqcmd(struct qcommand **queue, char *string)
357{
358 struct qcommand *new;
359
360 while(*queue != NULL)
361 queue = &(*queue)->next;
362 new = smalloc(sizeof(*new));
363 new->string = sstrdup(string);
364 new->next = *queue;
365 *queue = new;
366 return(new);
367}
368
369static struct qcommand *ulqcmd(struct qcommand **queue)
370{
371 struct qcommand *qcmd;
372
373 if((qcmd = *queue) == NULL)
374 return(NULL);
375 *queue = qcmd->next;
376 return(qcmd);
377}
378
379static void freeqcmd(struct qcommand *qcmd)
380{
381 free(qcmd->string);
382 free(qcmd);
383}
384
385static void hubrecvchat(struct socket *sk, struct fnetnode *fn, char *from, char *string)
386{
387 wchar_t *chat, *wfrom, *wpeer;
388 char *p, *end;
389 struct fnetpeer *peer;
390
391 end = string + strlen(string);
392 while((p = strchr(string, 13)) != NULL)
393 memmove(p, p + 1, (end-- - p));
394 if(from != NULL)
395 {
396 if((strlen(string) > strlen(from) + 2) && (*string == '<') && !memcmp(string + 1, from, strlen(from)) && (*(string + strlen(from) + 1) == '>'))
397 string += strlen(from) + 2;
398 if((wfrom = icmbstowcs(from, DCCHARSET)) == NULL)
399 return;
400 wpeer = swcsdup(wfrom);
401 } else {
402 wfrom = NULL;
403 wpeer = NULL;
404 if(*string == '<')
405 {
406 for(p = string + 1; *p; p++)
407 {
408 if((*p == ' ') || (*p == '>'))
409 break;
410 }
411 if(*p == '>')
412 {
413 *(p++) = 0;
414 if(*p == ' ')
415 p++;
416 if((wpeer = icmbstowcs(string + 1, DCCHARSET)) == NULL)
417 return;
418 string = p;
419 }
420 }
421 if(wpeer == NULL)
422 wpeer = swcsdup(L"");
423 }
424 if((chat = icmbstowcs(string, DCCHARSET)) == NULL)
425 {
426 if(wfrom != NULL)
427 free(wfrom);
428 free(wpeer);
429 return;
430 }
431 unquote(chat);
432 if(wfrom != NULL)
433 {
434 if((peer = fnetfindpeer(fn, wfrom)) == NULL) /* Assume public chat */
435 fnethandlechat(fn, 1, wfrom, wpeer, chat);
436 else
437 fnethandlechat(fn, 0, wfrom, wpeer, chat);
438 } else {
439 fnethandlechat(fn, 1, L"", wpeer, chat);
440 }
441 if(wfrom != NULL)
442 free(wfrom);
443 free(wpeer);
444 free(chat);
445}
446
447static void sendadc(struct socket *sk, char *arg)
448{
449 char *buf;
450 size_t bufsize, bufdata;
451
452 buf = NULL;
453 bufsize = bufdata = 0;
454 addtobuf(buf, ' ');
455 for(; *arg; arg++)
456 {
457 if(*arg == ' ')
458 {
459 bufcat(buf, "\\s", 2);
460 } else if(*arg == '\n') {
461 bufcat(buf, "\\n", 2);
462 } else if(*arg == '\\') {
463 bufcat(buf, "\\\\", 2);
464 } else {
465 addtobuf(buf, *arg);
466 }
467 }
468 sockqueue(sk, buf, bufdata);
469 free(buf);
470}
471
472static void sendadcf(struct socket *sk, char *arg, ...)
473{
474 char *buf;
475 va_list args;
476
477 va_start(args, arg);
478 buf = vsprintf2(arg, args);
479 va_end(args);
480 if(buf == NULL)
481 return;
482 sendadc(sk, buf);
483 free(buf);
484}
485
486static char **parseadc(char *args)
487{
488 char **retbuf;
489 size_t retbufsize, retbufdata;
490 char *buf;
491 size_t bufsize, bufdata;
492 int state;
493
494 retbuf = NULL;
495 buf = NULL;
496 retbufsize = retbufdata = bufsize = bufdata = 0;
497 state = 0;
498 while(state != 3)
499 {
500 switch(state)
501 {
502 case 0:
503 if(*args == 0)
504 state = 3;
505 else if(*args != ' ')
506 state = 1;
507 break;
508 case 1:
509 if((*args == ' ') || (*args == 0))
510 {
511 addtobuf(buf, 0);
512 addtobuf(retbuf, buf);
513 buf = NULL;
514 bufsize = bufdata = 0;
515 if(*args == 0)
516 state = 3;
517 } else if(*args == '\\') {
518 state = 2;
519 } else {
520 addtobuf(buf, *args);
521 }
522 args++;
523 break;
524 case 2:
525 if(*args == 0)
526 {
527 if(buf != NULL)
528 free(buf);
529 addtobuf(retbuf, NULL);
530 freeparr(retbuf);
531 return(NULL);
f24d5cfb 532 } else if((*args == 's') || (*args == ' ')) {
d3372da9 533 addtobuf(buf, ' ');
534 } else if(*args == 'n') {
535 addtobuf(buf, '\n');
536 } else if(*args == '\\') {
537 addtobuf(buf, '\\');
538 }
a478552c 539 args++;
d3372da9 540 state = 1;
a478552c 541 break;
d3372da9 542 }
543 }
544 if(buf != NULL)
545 free(buf);
546 addtobuf(retbuf, NULL);
547 return(retbuf);
548}
549
550/* Macros useful in command handlers */
551#define skipspace(s) ({if(((s) = strchr((s), ' ')) == NULL) return; else (s)++;})
552#define qstr(sk, str) sockqueue(sk, str, strlen(str))
553#define qstrf(sk, strandargs...) \
554do { \
555 char *__buf__; \
556 if((__buf__ = sprintf2(strandargs)) != NULL) { \
557 sockqueue(sk, __buf__, strlen(__buf__)); \
558 free(__buf__); \
559 } \
560} while(0)
561
562static char *tr(char *str, char *trans)
563{
564 char *p;
565
566 for(; *trans; trans += 2)
567 {
568 for(p = strchr(str, trans[0]); p != NULL; p = strchr(p, trans[0]))
569 *p = trans[1];
570 }
571 return(str);
572}
573
9a2d6cb8 574static char *getadcid(struct dcpeer *peer)
575{
576 char *buf;
577 char *ret;
d57f938a 578 int isfilelist;
9a2d6cb8 579
d57f938a 580 if(!wcscmp(peer->transfer->path, L"files.xml") || !wcscmp(peer->transfer->path, L"files.xml.bz2") || !wcscmp(peer->transfer->path, L"MyList.DcLst"))
581 isfilelist = 1;
582 if(!isfilelist && (peer->transfer->hash != NULL) && isdchash(peer->transfer->hash) && supports(peer, "tthf"))
9a2d6cb8 583 {
584 buf = base32encode(peer->transfer->hash->buf, 24);
585 ret = sprintf2("TTH/%.39s", buf);
586 free(buf);
587 } else {
588 if((buf = icwcstombs(peer->transfer->path, "UTF-8")) == NULL)
589 return(NULL);
590 ret = pathnmdc2adc(buf);
591 free(buf);
592 }
593 return(ret);
594}
595
596
d3372da9 597static int trresumecb(struct transfer *transfer, wchar_t *cmd, wchar_t *arg, struct dcpeer *peer)
598{
599 if(!wcscmp(cmd, L"resume"))
600 {
601 if(arg == NULL)
602 {
603 flog(LOG_WARNING, "filter returned no position for \"resume\" on transfer %i", transfer->id);
604 freedcpeer(peer);
605 } else {
606 transfer->curpos = wcstol(arg, NULL, 10);
9a2d6cb8 607 peer->hascurpos = 1;
608 requestfile(peer);
d3372da9 609 }
d3372da9 610 return(1);
611 }
612 return(0);
613}
614
9a2d6cb8 615static void sendmynick(struct dcpeer *peer)
d3372da9 616{
617 struct dchub *hub;
d3372da9 618
9a2d6cb8 619 hub = (peer->fn == NULL)?NULL:(peer->fn->data);
620 if(hub == NULL)
621 qstrf(peer->sk, "$MyNick %s|", icswcstombs(confgetstr("cli", "defnick"), DCCHARSET, "DoldaConnectUser-IN"));
622 else
623 qstrf(peer->sk, "$MyNick %s|", hub->nativenick);
624}
625
626static void sendpeerlock(struct dcpeer *peer)
627{
628#ifdef DCPP_MASQUERADE
629 qstrf(peer->sk, "$Lock EXTENDEDPROTOCOLABCABCABCABCABCABC Pk=DCPLUSPLUS0.674ABCABC|");
630#else
631 qstrf(peer->sk, "$Lock EXTENDEDPROTOCOLABCABCABCABCABCABC Pk=DOLDA%sABCABCABC|", VERSION);
632#endif
633}
634
635static void sendsupports(struct dcpeer *peer)
636{
637#ifdef DCPP_MASQUERADE
638 qstr(peer->sk, "$Supports MiniSlots XmlBZList ADCGet TTHL TTHF GetZBlock ZLIG |");
639#else
640 qstr(peer->sk, "$Supports MiniSlots XmlBZList ADCGet TTHL TTHF GetZBlock ZLIG|");
641#endif
642}
643
644static void requestfile(struct dcpeer *peer)
645{
646 char *buf;
647
648 if(peer->transfer->size == -1)
d3372da9 649 {
9a2d6cb8 650 if((buf = icswcstombs(peer->transfer->path, DCCHARSET, NULL)) == NULL)
d3372da9 651 {
9a2d6cb8 652 transferseterror(peer->transfer, TRNSE_NOTFOUND);
653 freedcpeer(peer);
d3372da9 654 return;
655 }
9a2d6cb8 656 /* The transfer will be restarted later from
657 * cmd_filelength when it detects that the sizes
658 * don't match. */
659 qstrf(peer->sk, "$Get %s$1|", buf);
660 return;
d3372da9 661 }
9a2d6cb8 662 if((peer->transfer->hash == NULL) && !peer->notthl)
d3372da9 663 {
9a2d6cb8 664 if(supports(peer, "adcget") && supports(peer, "tthl"))
d3372da9 665 {
9a2d6cb8 666 qstr(peer->sk, "$ADCGET");
667 sendadc(peer->sk, "tthl");
668 if((buf = getadcid(peer)) == NULL)
d3372da9 669 {
9a2d6cb8 670 transferseterror(peer->transfer, TRNSE_NOTFOUND);
d3372da9 671 freedcpeer(peer);
672 return;
673 }
9a2d6cb8 674 sendadc(peer->sk, buf);
675 free(buf);
676 sendadc(peer->sk, "0");
677 sendadc(peer->sk, "-1");
678 qstr(peer->sk, "|");
679 return;
680 }
681 }
682 if(!peer->hascurpos)
683 {
684 if(forkfilter(peer->transfer))
685 {
686 flog(LOG_WARNING, "could not fork filter for transfer %i: %s", peer->transfer->id, strerror(errno));
687 freedcpeer(peer);
688 return;
d3372da9 689 }
9a2d6cb8 690 CBREG(peer->transfer, trans_filterout, (int (*)(struct transfer *, wchar_t *, wchar_t *, void *))trresumecb, NULL, peer);
691 return;
692 }
693 if(supports(peer, "adcget"))
694 {
695 qstr(peer->sk, "$ADCGET");
696 sendadc(peer->sk, "file");
697 if((buf = getadcid(peer)) == NULL)
698 {
699 transferseterror(peer->transfer, TRNSE_NOTFOUND);
700 freedcpeer(peer);
701 return;
702 }
703 sendadc(peer->sk, buf);
704 free(buf);
705 sendadcf(peer->sk, "%i", peer->transfer->curpos);
706 sendadcf(peer->sk, "%i", peer->transfer->size - peer->transfer->curpos);
707 qstr(peer->sk, "|");
708 } else if(supports(peer, "xmlbzlist")) {
709 if((buf = icswcstombs(peer->transfer->path, "UTF-8", NULL)) == NULL)
710 {
711 transferseterror(peer->transfer, TRNSE_NOTFOUND);
712 freedcpeer(peer);
713 return;
714 }
715 qstrf(peer->sk, "$UGetBlock %i %i %s|", peer->transfer->curpos, peer->transfer->size - peer->transfer->curpos, buf);
d3372da9 716 } else {
9a2d6cb8 717 if((buf = icswcstombs(peer->transfer->path, DCCHARSET, NULL)) == NULL)
d3372da9 718 {
9a2d6cb8 719 transferseterror(peer->transfer, TRNSE_NOTFOUND);
720 freedcpeer(peer);
721 return;
d3372da9 722 }
9a2d6cb8 723 qstrf(peer->sk, "$Get %s$%i|", buf, peer->transfer->curpos + 1);
d3372da9 724 }
725}
726
727static void sendmyinfo(struct socket *sk, struct fnetnode *fn)
728{
729 struct dchub *hub;
730 char *buf;
731 struct fnetnode *cfn;
69757b8c 732 int hn1, hn2, hn3;
d3372da9 733
734 hub = fn->data;
735 qstrf(sk, "$MyINFO $ALL %s ", hub->nativenick);
736 buf = tr(icswcstombs(confgetstr("dc", "desc"), DCCHARSET, "Charset_conv_failure"), "$_|_");
737 qstrf(sk, "%s", buf);
69757b8c 738 hn1 = hn2 = hn3 = 0;
d3372da9 739 for(cfn = fnetnodes; cfn != NULL; cfn = cfn->next)
740 {
741 if((cfn->state == FNN_EST) || (cfn->state == FNN_HS))
69757b8c 742 {
743 if(cfn->regstatus == FNNS_OP)
744 hn3++;
745 else if(cfn->regstatus == FNNS_REG)
746 hn2++;
747 else
748 hn1++;
749 }
d3372da9 750 }
69757b8c 751 qstrf(sk, "<%s V:%s,M:%c,H:%i/%i/%i,S:%i>",
d3372da9 752 DCIDTAG,
753 DCIDTAGV,
754 (tcpsock == NULL)?'P':'A',
69757b8c 755 hn1, hn2, hn3,
d3372da9 756 confgetint("transfer", "slots")
757 );
758 qstrf(sk, "$ $");
759 buf = tr(icswcstombs(confgetstr("dc", "speedstring"), DCCHARSET, "Charset_conv_failure"), "$_|_");
760 qstrf(sk, "%s\x01$", buf);
761 buf = tr(icswcstombs(confgetstr("dc", "email"), DCCHARSET, "Charset_conv_failure"), "$_|_");
762 qstrf(sk, "%s$", buf);
763 qstrf(sk, "%llu$|", sharesize);
764}
765
766static void hubhandleaction(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
767{
768 struct dchub *hub;
769
770 hub = fn->data;
771 if(!strcmp(cmd, "$Lock"))
772 {
773 qstrf(sk, "$ValidateNick %s|", hub->nativenick);
774 } else if(!strcmp(cmd, "$Hello")) {
775 if(fn->state == FNN_HS)
776 {
777 qstrf(sk, "$Version 1,0091|");
778 qstrf(sk, "$GetNickList|");
779 sendmyinfo(sk, fn);
780 fnetsetstate(fn, FNN_EST);
781 } else {
782 qstrf(sk, "$GetINFO %s %s|", args, hub->nativenick);
783 }
784 }
785}
786
787static void cmd_lock(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
788{
789 struct dchub *hub;
790 char *key;
791 char *p;
792
793 hub = fn->data;
794 if(!strncmp(args, "EXTENDEDPROTOCOL", 16))
795 hub->extended = 1;
796 if((p = strchr(args, ' ')) != NULL)
797 *(p++) = 0;
798 if(hub->extended)
799 {
800#ifdef DCPP_MASQUERADE
801 qstrf(sk, "$Supports UserCommand NoGetINFO NoHello UserIP2 TTHSearch GetZBlock |");
802#else
803 qstrf(sk, "$Supports UserCommand NoGetINFO NoHello UserIP2 TTHSearch GetZBlock|");
804#endif
805 }
806 key = dcmakekey(args);
807 qstrf(sk, "$Key %s|", key);
808 free(key);
809 hubhandleaction(sk, fn, cmd, args);
810}
811
812static void cmd_hubname(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
813{
814 wchar_t *buf;
815 struct dchub *hub;
816
817 hub = fn->data;
818 if(hub->nativename == NULL)
819 free(hub->nativename);
820 hub->nativename = sstrdup(args);
821 buf = icmbstowcs(args, DCCHARSET);
822 fnetsetname(fn, (buf == NULL)?L"Hubname conv error":buf);
823 if(buf != NULL)
824 free(buf);
825 hubhandleaction(sk, fn, cmd, args);
826}
827
828static void cmd_hello(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
829{
830 wchar_t *nick;
831 struct dchub *hub;
832
833 hub = fn->data;
834 if((nick = icmbstowcs(args, DCCHARSET)) == NULL)
835 return;
836 if(strcmp(args, hub->nativenick) && (fnetfindpeer(fn, nick) == NULL))
837 fnetaddpeer(fn, nick, nick);
838 free(nick);
839 hubhandleaction(sk, fn, cmd, args);
840}
841
842static void cmd_quit(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
843{
844 wchar_t *nick;
845 struct fnetpeer *peer;
846 struct dchub *hub;
847
848 hub = fn->data;
849 if((nick = icmbstowcs(args, DCCHARSET)) == NULL)
850 return;
851 if((peer = fnetfindpeer(fn, nick)) != NULL)
852 fnetdelpeer(peer);
853 free(nick);
854 hubhandleaction(sk, fn, cmd, args);
855}
856
857static void cmd_nicklist(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
858{
859 struct dchub *hub;
860 char *p;
861 wchar_t *buf;
862 struct fnetpeer *peer, *npeer;
863
864 hub = fn->data;
865 for(peer = fn->peers; peer != NULL; peer = peer->next)
866 peer->flags.b.delete = 1;
867 while((p = strstr(args, "$$")) != NULL)
868 {
869 *p = 0;
870 if((buf = icmbstowcs(args, DCCHARSET)) != NULL)
871 {
872 if((peer = fnetfindpeer(fn, buf)) == NULL)
873 peer = fnetaddpeer(fn, buf, buf);
874 else
875 peer->flags.b.delete = 0;
876 free(buf);
877 qstrf(sk, "$GetINFO %s %s|", args, hub->nativenick);
878 }
879 args = p + 2;
880 }
881 for(peer = fn->peers; peer != NULL; peer = npeer)
882 {
883 npeer = peer->next;
884 if(peer->flags.b.delete)
885 fnetdelpeer(peer);
886 }
887 hubhandleaction(sk, fn, cmd, args);
888}
889
890static void cmd_oplist(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
891{
892 struct dchub *hub;
893 char *p;
894 wchar_t *buf;
895 struct fnetpeer *peer;
896
897 hub = fn->data;
898 for(peer = fn->peers; peer != NULL; peer = peer->next)
899 peer->flags.b.op = 0;
900 while((p = strstr(args, "$$")) != NULL)
901 {
902 *p = 0;
903 if((buf = icmbstowcs(args, DCCHARSET)) != NULL)
904 {
905 if((peer = fnetfindpeer(fn, buf)) != NULL)
906 peer->flags.b.op = 1;
907 free(buf);
908 }
909 args = p + 2;
910 }
911 hubhandleaction(sk, fn, cmd, args);
912}
913
914static void cmd_myinfo(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
915{
916 char *p, *p2;
917 wchar_t *buf, *wp, *wp2;
918 wchar_t abuf[10];
919 struct fnetpeer *peer;
920 struct dchub *hub;
921
922 hub = fn->data;
923 p = args;
924 if(strncmp(p, "$ALL ", 5))
925 return;
926 p += 5;
927 if((p2 = strchr(p, ' ')) == NULL)
928 return;
929 *p2 = 0;
930 if((buf = icmbstowcs(p, DCCHARSET)) == NULL)
931 return;
932 if((peer = fnetfindpeer(fn, buf)) == NULL)
933 peer = fnetaddpeer(fn, buf, buf);
934 free(buf);
935 p = p2 + 1;
936 if((p2 = strstr(p, "$ $")) == NULL)
937 return;
938 *p2 = 0;
939 if((buf = icmbstowcs(p, DCCHARSET)) == NULL)
940 return;
941 if((wcslen(buf) > 0) && (buf[wcslen(buf) - 1] == L'>') && ((wp = wcschr(buf, L'<')) != NULL))
942 {
943 buf[wcslen(buf) - 1] = L'\0';
944 *(wp++) = L'\0';
945 if((wp2 = wcschr(wp, L' ')) != NULL)
946 {
947 *(wp2++) = L'\0';
948 fnetpeersetstr(peer, L"dc-client", wp);
949 wp = wp2;
950 do
951 {
952 if((wp2 = wcschr(wp, L',')) != NULL)
953 *(wp2++) = L'\0';
954 if(wp[1] != L':')
955 continue;
956 swprintf(abuf, 10, L"dc-tag-%lc", wp[0]);
957 fnetpeersetstr(peer, abuf, wp + 2);
958 wp = wp2;
959 } while(wp2 != NULL);
960 }
961 }
962 fnetpeersetstr(peer, L"descr", buf);
963 free(buf);
964 p = p2 + 3;
965 if((p2 = strchr(p, '$')) == NULL)
966 return;
967 *(p2 - 1) = 0;
968 if((buf = icmbstowcs(p, DCCHARSET)) == NULL)
969 return;
970 fnetpeersetstr(peer, L"dc-speed", buf);
971 free(buf);
972 p = p2 + 1;
973 if((p2 = strchr(p, '$')) == NULL)
974 return;
975 *p2 = 0;
976 if((buf = icmbstowcs(p, DCCHARSET)) == NULL)
977 return;
978 fnetpeersetstr(peer, L"email", buf);
979 free(buf);
980 p = p2 + 1;
981 if(strlen(p) < 1)
982 return;
983 fnetpeersetlnum(peer, L"share", strtoll(p, NULL, 10));
984 hubhandleaction(sk, fn, cmd, args);
985}
986
987/* I do not implement the fully in that I do not disconnect from the
988 * old hub. I do this since I believe that if the hub owner really
989 * wants to get rid of us, then it is his responsibility to disconnect
990 * us. */
991static void cmd_forcemove(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
992{
993 struct dchub *hub;
994 struct fnetnode *newfn;
995 int freeargs;
996
997 hub = fn->data;
998 if(strchr(args, ':') == NULL)
999 {
1000 args = strcpy(smalloc(strlen(args) + 5), args);
1001 strcat(args, ":411");
1002 freeargs = 1;
1003 } else {
1004 freeargs = 0;
1005 }
efc05613 1006 if((newfn = fnetinitconnect(L"dc", args, NULL)) != NULL)
d3372da9 1007 {
1008 linkfnetnode(newfn);
1009 putfnetnode(newfn);
1010 }
1011 hubhandleaction(sk, fn, cmd, args);
1012 if(freeargs)
1013 free(args);
1014}
1015
1016static char *getdcpath(struct sharecache *node, size_t *retlen)
1017{
1018 char *buf, *buf2;
1019 size_t len, len2;
1020
1021 if(node->parent == NULL)
1022 return(NULL);
1023 if(node->parent == shareroot)
1024 {
1025 if((buf = icwcstombs(node->name, DCCHARSET)) == NULL)
1026 return(NULL);
1027 if(retlen != NULL)
1028 *retlen = strlen(buf);
1029 return(buf);
1030 } else {
1031 if((buf2 = icwcstombs(node->name, DCCHARSET)) == NULL)
1032 return(NULL);
1033 if((buf = getdcpath(node->parent, &len)) == NULL)
1034 {
1035 free(buf2);
1036 return(NULL);
1037 }
1038 len2 = strlen(buf2);
1039 buf = srealloc(buf, len + 1 + len2 + 1);
1040 buf[len++] = '\\';
1041 strcpy(buf + len, buf2);
1042 buf[len + len2] = 0;
1043 free(buf2);
1044 if(retlen != NULL)
1045 *retlen = len + len2;
1046 return(buf);
1047 }
1048}
1049
1050/*
1051 * This is the main share searching function for Direct Connect
1052 * peers. Feel free to optimize it if you feel the need for it. I
1053 * haven't ever seen it take any noticable CPU time anyway, so I
1054 * haven't felt that need.
1055 *
1056 * It may feel dubious to just return the directory when all terms are
1057 * satisfied rather than all the files in it, but it really benefits
1058 * everyone: Less cycles used for us, less UDP squelching for active
1059 * searchers, and less bandwidth waste for hubs when serving passive
1060 * searchers.
1061 */
1062static void cmd_search(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
1063{
1064 int i, done;
1065 struct dchub *hub;
1066 char *p, *p2;
1067 char *prefix, *infix, *postfix, *buf, *buf2;
1068 struct socket *dsk;
1069 struct sockaddr_in addr;
1070 struct sharecache *node;
1071 int minsize, maxsize;
1072 int dotth, buflen;
1073 int termnum, satisfied, skipcheck;
1074 int level, tersat[32];
1075 wchar_t *terms[32];
1076 char hashtth[24];
1077
1078 hub = fn->data;
1079 if((p = strchr(args, ' ')) == NULL)
1080 return;
1081 *(p++) = 0;
1082
1083 memset(terms, 0, sizeof(terms));
1084 prefix = infix = postfix = NULL;
1085 dsk = NULL;
1086 dotth = 0;
1087
1088 if(!strncmp(args, "Hub:", 4))
1089 {
1090 if(!strcmp(cmd, "$MultiSearch"))
1091 goto out;
1092 if(!strcmp(args + 4, hub->nativenick))
1093 goto out;
1094 prefix = sprintf2("$SR %s ", hub->nativenick);
1095 infix = sprintf2(" %i/%i\005", slotsleft(), confgetint("transfer", "slots"));
1096 postfix = sprintf2(" (%s)\005%s|", formataddress(fn->sk->remote, fn->sk->remotelen), args + 4);
1097 dsk = sk;
1098 getsock(dsk);
1099 } else {
1100 if((p2 = strchr(args, ':')) == NULL)
1101 goto out;
1102 *(p2++) = 0;
1103 addr.sin_family = AF_INET;
1104 if(!inet_aton(args, &addr.sin_addr))
1105 goto out;
1106 addr.sin_port = htons(atoi(p2));
1107 prefix = sprintf2("$SR %s ", hub->nativenick);
1108 infix = sprintf2(" %i/%i\005", slotsleft(), confgetint("transfer", "slots"));
1109 postfix = sprintf2(" (%s)|", formataddress(fn->sk->remote, fn->sk->remotelen));
1110 netdgramconn(dsk = netdupsock(udpsock), (struct sockaddr *)&addr, sizeof(addr));
1111 }
1112
1113 minsize = maxsize = -1;
1114 if(*p == 0)
1115 goto out;
1116 if(*(p++) == 'T')
1117 minsize = 0;
1118 if(*(p++) != '?')
1119 goto out;
1120 if(*p == 0)
1121 goto out;
9d8cf743 1122 if((*(p++) == 'T') && (minsize == 0))
d3372da9 1123 {
1124 maxsize = 0;
1125 minsize = -1;
1126 }
1127 if(*(p++) != '?')
1128 goto out;
1129 if((p2 = strchr(p, '?')) == NULL)
1130 goto out;
1131 *(p2++) = 0;
1132 if(minsize == 0)
1133 minsize = atoi(p);
1134 if(maxsize == 0)
1135 maxsize = atoi(p);
1136 p = p2 + 1;
1137 if(*(p++) != '?')
1138 goto out;
1139 termnum = 0;
1140 p2 = p;
1141 done = 0;
1142 while(!done)
1143 {
1144 if((*p2 == 0) || (*p2 == '$'))
1145 {
1146 if(*p2 == 0)
1147 done = 1;
1148 else
1149 *p2 = 0;
1150 if(*p)
1151 {
1152 if(!dotth && !strncmp(p, "TTH:", 4))
1153 {
1154 dotth = 1;
1155 if((buf = base32decode(p + 4, &buflen)) == NULL)
1156 goto out;
1157 if(buflen != 24)
1158 goto out;
1159 memcpy(hashtth, buf, 24);
1160 free(buf);
1161 } else {
1162 if((terms[termnum] = icmbstowcs(p, DCCHARSET)) != NULL)
1163 termnum++;
1164 }
1165 }
1166 p = p2 + 1;
1167 if(termnum == 32)
1168 break;
1169 }
1170 p2++;
1171 }
1172
1173 node = shareroot->child;
1174 level = 0;
1175 for(i = 0; i < termnum; i++)
1176 tersat[i] = -1;
1177 satisfied = 0;
1178 while(1)
1179 {
1180 skipcheck = 0;
1181 if(node->f.b.type == FILE_REG)
1182 {
1183 if((minsize >= 0) && (node->size < minsize))
1184 skipcheck = 1;
1185 if((maxsize >= 0) && (node->size > maxsize))
1186 skipcheck = 1;
1187 }
1188 if(!skipcheck && dotth)
1189 {
1190 if((node->f.b.type != FILE_REG) || (node->f.b.hastth && memcmp(hashtth, node->hashtth, 24)))
1191 skipcheck = 1;
1192 }
1193 if(!skipcheck)
1194 {
1195 for(i = 0; i < termnum; i++)
1196 {
1197 if(tersat[i] >= 0)
1198 continue;
1199 if(wcsexists(node->name, terms[i]))
1200 {
1201 tersat[i] = level;
1202 satisfied++;
1203 } else if(node->child == NULL) {
1204 break;
1205 }
1206 }
1207 }
1208 if(!skipcheck && (satisfied == termnum))
1209 {
1210 if((buf = getdcpath(node, NULL)) != NULL)
1211 {
1212 if(node->f.b.hastth)
1213 {
1214 buf2 = base32encode(node->hashtth, 24);
1215 qstrf(dsk, "%s%s\005%i%sTTH:%.39s%s", prefix, buf, node->size, infix, buf2, postfix);
1216 free(buf2);
1217 } else {
1218 qstrf(dsk, "%s%s\005%i%s%s%s", prefix, buf, node->size, infix, hub->nativename, postfix);
1219 }
1220 free(buf);
1221 }
1222 }
1223 if((!skipcheck && (satisfied == termnum)) || (node->child == NULL))
1224 {
1225 while(node->next == NULL)
1226 {
1227 if((node = node->parent) == shareroot)
1228 break;
1229 level--;
1230 }
1231 if(node == shareroot)
1232 break;
1233 for(i = 0; i < termnum; i++)
1234 {
1235 if(tersat[i] >= level)
1236 {
1237 tersat[i] = -1;
1238 satisfied--;
1239 }
1240 }
1241 node = node->next;
1242 } else {
1243 node = node->child;
1244 level++;
1245 }
1246 }
1247
1248 hubhandleaction(sk, fn, cmd, args);
1249
1250 out:
1251 if(dsk != NULL)
1252 putsock(dsk);
1253 if(prefix != NULL)
1254 free(prefix);
1255 if(infix != NULL)
1256 free(infix);
1257 if(postfix != NULL)
1258 free(postfix);
1259 for(i = 0; (i < 32) && (terms[i] != NULL); i++)
1260 free(terms[i]);
1261}
1262
1263static void cmd_connecttome(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
1264{
1265 char *p;
1266 struct dchub *hub;
1267 struct socket *newsk;
1268 struct sockaddr_in addr;
1269
1270 hub = fn->data;
1271 if((p = strchr(args, ' ')) == NULL)
1272 return;
1273 *(p++) = 0;
1274 if(strcmp(args, hub->nativenick))
1275 return;
1276 addr.sin_family = AF_INET;
1277 args = p;
1278 if((p = strchr(args, ':')) == NULL)
1279 return;
1280 *(p++) = 0;
1281 addr.sin_port = htons(atoi(p));
1282 if(!inet_aton(args, &addr.sin_addr))
1283 return;
1284 newsk = netcsconn((struct sockaddr *)&addr, sizeof(addr), (void (*)(struct socket *, int, void *))peerconnect, fn);
1285 getfnetnode(fn);
1286 hubhandleaction(sk, fn, cmd, args);
1287}
1288
1289static void sendctm(struct socket *sk, char *nick)
1290{
1291 struct sockaddr *addr;
1292 socklen_t addrlen;
1293
1294 if(tcpsock == NULL)
1295 return;
1296 if(sockgetremotename(tcpsock, &addr, &addrlen) < 0)
1297 return;
1298 if(addr->sa_family == AF_INET)
1299 qstrf(sk, "$ConnectToMe %s %s|", nick, formataddress(addr, addrlen));
1300 else
1301 flog(LOG_WARNING, "Direct Connect TCP socket is suddenly not AF_INET, but %i", addr->sa_family);
1302 free(addr);
1303}
1304
1305static void cmd_revconnecttome(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
1306{
1307 struct dchub *hub;
1308 char *p;
1309
1310 hub = fn->data;
1311 if((p = strchr(args, ' ')) == NULL)
1312 return;
1313 *(p++) = 0;
1314 if(strcmp(p, hub->nativenick))
1315 return;
1316 sendctm(sk, args);
1317 expectpeer(args, fn);
1318 hubhandleaction(sk, fn, cmd, args);
1319}
1320
1321static void cmd_getnetinfo(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
1322{
1323 struct dchub *hub;
1324 struct fnetnode *node;
1325 int numhubs;
1326
1327 hub = fn->data;
1328 numhubs = 0;
1329 for(node = fnetnodes; node != NULL; node = node->next)
1330 {
1331 if(node->state == FNN_EST)
1332 numhubs++;
1333 }
1334 qstrf(sk, "$NetInfo %i$%i$%c$0|", confgetint("transfer", "slots"), numhubs, (tcpsock == NULL)?'P':'A');
1335 hubhandleaction(sk, fn, cmd, args);
1336}
1337
1338static void cmd_to(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
1339{
1340 struct dchub *hub;
1341 char *p, *p2;
1342
1343 hub = fn->data;
1344 p = args;
1345 if((p2 = strchr(p, ' ')) == NULL)
1346 return;
1347 *(p2++) = 0;
1348 p = p2;
1349 if((p2 = strchr(p, ' ')) == NULL)
1350 return;
1351 *(p2++) = 0;
1352 if(strcmp(p, "From:"))
1353 return;
1354 p = p2;
1355 if((p2 = strstr(p, " $")) == NULL)
1356 return;
1357 *p2 = 0;
1358 p2 += 2;
1359 hubrecvchat(fn->sk, fn, p, p2);
1360 hubhandleaction(sk, fn, cmd, args);
1361}
1362
1363static void cmd_sr(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
1364{
1365 struct dchub *hub;
d86b7a9f 1366 char *p, *p2, *buf;
d3372da9 1367 char *nick, *filename, *hubname;
1368 int size, slots;
d86b7a9f 1369 size_t buflen;
d3372da9 1370 struct srchres *sr;
1371 wchar_t *wnick, *wfile;
1372
1373 hub = fn->data;
1374 nick = p = args;
1375 if((p2 = strchr(p, ' ')) == NULL)
1376 return;
1377 *p2 = 0;
1378 p = p2 + 1;
1379 filename = p;
1380 if((p2 = strchr(p, 5)) == NULL)
1381 return;
1382 *p2 = 0;
1383 p = p2 + 1;
1384 if((p2 = strchr(p, ' ')) == NULL)
1385 return;
1386 *p2 = 0;
1387 size = atoi(p);
1388 p = p2 + 1;
1389 if((p2 = strchr(p, '/')) == NULL)
1390 return;
1391 *p2 = 0;
1392 slots = atoi(p);
1393 p = p2 + 1;
1394 if((p2 = strchr(p, 5)) == NULL)
1395 return;
1396 p = p2 + 1;
1397 hubname = p;
1398 if((p2 = strstr(p, " (")) == NULL)
1399 return;
1400 *p2 = 0;
1401 if((wnick = icmbstowcs(nick, DCCHARSET)) == NULL)
1402 return;
1403 if((wfile = icmbstowcs(filename, DCCHARSET)) == NULL)
1404 {
1405 free(wnick);
1406 return;
1407 }
1408 sr = newsrchres(&dcnet, wfile, wnick);
1409 if(sr->peernick != NULL)
1410 free(sr->peernick);
1411 sr->peernick = swcsdup(wnick);
1412 sr->size = size;
1413 sr->slots = slots;
1414 free(wfile);
1415 free(wnick);
d86b7a9f 1416 if(!strncmp(hubname, "TTH:", 4))
1417 {
1418 if((buf = base32decode(hubname + 4, &buflen)) != NULL)
1419 {
1420 if(buflen == 24)
1421 sr->hash = newhash(L"TTH", 24, buf);
1422 free(buf);
1423 }
1424 }
d3372da9 1425 getfnetnode(sr->fn = fn);
1426 submitsrchres(sr);
1427 freesrchres(sr);
1428 hubhandleaction(sk, fn, cmd, args);
1429}
1430
1431static void cmd_usercommand(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
1432{
1433 /* Do nothing for now. */
1434}
1435
48509089 1436static void cmd_getpass(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
1437{
1438 struct dchub *hub;
1439 struct wcspair *arg;
1440 char *mbspw;
1441
1442 hub = fn->data;
1443 for(arg = fn->args; arg != NULL; arg = arg->next)
1444 {
1445 if(!wcscmp(arg->key, L"password"))
1446 break;
1447 }
1448 if((arg == NULL) || ((mbspw = icwcstombs(arg->val, DCCHARSET)) == NULL))
1449 {
1450 killfnetnode(fn);
1451 return;
1452 }
1453 qstrf(sk, "$MyPass %s|", mbspw);
1454 free(mbspw);
fcd0627b 1455 fn->regstatus = FNNS_REG;
48509089 1456 hubhandleaction(sk, fn, cmd, args);
1457}
1458
c9b3ad74 1459static void cmd_logedin(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
1460{
1461 struct dchub *hub;
1462
1463 hub = fn->data;
fcd0627b 1464 fn->regstatus = FNNS_OP;
c9b3ad74 1465 hubhandleaction(sk, fn, cmd, args);
1466}
1467
d3372da9 1468static void cmd_mynick(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1469{
9a2d6cb8 1470 struct dcexppeer *expect;
1471
d3372da9 1472 if(peer->nativename != NULL)
1473 free(peer->nativename);
1474 peer->nativename = sstrdup(args);
1475 if(peer->wcsname != NULL)
1476 free(peer->wcsname);
1477 if((peer->wcsname = icmbstowcs(peer->nativename, DCCHARSET)) == NULL)
1478 {
1479 freedcpeer(peer);
1480 return;
1481 }
9a2d6cb8 1482 if(peer->accepted)
1483 {
1484 for(expect = expected; expect != NULL; expect = expect->next)
1485 {
1486 if(!strcmp(expect->nick, args))
1487 break;
1488 }
1489 if(expect == NULL)
1490 {
1491 peer->fn = NULL;
1492 } else {
1493 peer->fn = expect->fn;
1494 getfnetnode(peer->fn);
1495 freeexppeer(expect);
1496 }
1497 }
d3372da9 1498}
1499
1500static void cmd_direction(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1501{
1502 char *p;
9a2d6cb8 1503 int mydir;
1504 struct transfer *transfer;
d3372da9 1505
1506 if((p = strchr(args, ' ')) == NULL)
1507 return;
1508 *p = 0;
1509 if(!strcmp(args, "Upload"))
9a2d6cb8 1510 mydir = TRNSD_DOWN;
d3372da9 1511 if(!strcmp(args, "Download"))
9a2d6cb8 1512 mydir = TRNSD_UP;
1513 if(peer->accepted)
1514 {
1515 if((peer->transfer == NULL) || (mydir != peer->direction))
1516 {
1517 freedcpeer(peer);
1518 return;
1519 }
1b14d3d8 1520 if(peer->direction == TRNSD_DOWN)
1521 requestfile(peer);
9a2d6cb8 1522 } else {
1523 if(peer->wcsname == NULL)
1524 {
1525 freedcpeer(peer);
1526 return;
1527 }
1528 peer->direction = mydir;
1529 if(peer->direction == TRNSD_UP)
1530 {
1531 transfer = newupload(peer->fn, &dcnet, peer->wcsname, &dctransfer, peer);
1532 } else {
1533 if((transfer = finddownload(peer->wcsname)) == NULL)
1534 {
1535 freedcpeer(peer);
1536 return;
1537 }
1538 transferattach(transfer, &dctransfer, peer);
1539 transfersetstate(transfer, TRNS_HS);
1540 }
1541 transfersetnick(transfer, peer->wcsname);
1542 peer->transfer = transfer;
1543 if(peer->extended)
1544 sendsupports(peer);
1545 qstrf(sk, "$Direction %s %i|", (peer->direction == TRNSD_UP)?"Upload":"Download", rand() % 10000);
1546 if(peer->key != NULL)
1547 qstrf(sk, "$Key %s|", peer->key);
1548 if(peer->direction == TRNSD_DOWN)
1549 requestfile(peer);
1550 }
d3372da9 1551}
1552
1553static void cmd_peerlock(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1554{
9a2d6cb8 1555 char *p, *key;
1556 struct transfer *transfer;
d3372da9 1557
1558 if((p = strchr(args, ' ')) == NULL)
1559 return;
1560 *p = 0;
1561 if(!strncmp(args, "EXTENDEDPROTOCOL", 16))
1562 peer->extended = 1;
9a2d6cb8 1563 key = dcmakekey(args);
1564 if(peer->accepted)
1565 {
1566 if(peer->wcsname == NULL)
1567 {
1568 freedcpeer(peer);
1569 return;
1570 }
1571 sendmynick(peer);
1572 sendpeerlock(peer);
1573 if(peer->extended)
1574 sendsupports(peer);
1575 if((transfer = finddownload(peer->wcsname)) == NULL)
1576 {
1577 peer->direction = TRNSD_UP;
1578 transfer = newupload(peer->fn, &dcnet, peer->wcsname, &dctransfer, peer);
1579 } else {
1580 peer->direction = TRNSD_DOWN;
1581 transferattach(transfer, &dctransfer, peer);
1582 transfersetstate(transfer, TRNS_HS);
1583 }
1584 transfersetnick(transfer, peer->wcsname);
1585 peer->transfer = transfer;
1586 qstrf(sk, "$Direction %s %i|", (peer->direction == TRNSD_UP)?"Upload":"Download", rand() % 10000);
1587 qstrf(sk, "$Key %s|", key);
1588 } else {
1589 if(peer->key != NULL)
1590 free(peer->key);
1591 peer->key = key;
1592 }
d3372da9 1593}
1594
1595static void cmd_key(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1596{
9a2d6cb8 1597 /* NOP */
1598}
1599
1600static void startdl(struct dcpeer *peer)
1601{
1602 peer->state = PEER_TRNS;
1603 transferstartdl(peer->transfer, peer->sk);
1604 peer->sk->readcb = (void (*)(struct socket *, void *))transread;
1605 peer->sk->errcb = (void (*)(struct socket *, int, void *))transerr;
1606}
1607
1608static void startul(struct dcpeer *peer)
1609{
1610 peer->state = PEER_TRNS;
1611 transferstartul(peer->transfer, peer->sk);
1612 peer->sk->writecb = (void (*)(struct socket *, void *))transwrite;
d3372da9 1613}
1614
1615static void cmd_filelength(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1616{
1617 int size;
1618
1619 if(peer->transfer == NULL)
1620 {
1621 freedcpeer(peer);
1622 return;
1623 }
1624 size = atoi(args);
9a2d6cb8 1625 if(peer->transfer->size != size)
d3372da9 1626 {
d3372da9 1627 transfersetsize(peer->transfer, size);
1628 freedcpeer(peer);
1629 return;
1630 }
9a2d6cb8 1631 startdl(peer);
1632 qstr(peer->sk, "$Send|");
d3372da9 1633}
1634
1635static void cmd_error(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1636{
1637 if((peer->transfer != NULL) && (peer->transfer->dir == TRNSD_DOWN))
1638 {
1639 transferseterror(peer->transfer, TRNSE_NOTFOUND);
1640 resettransfer(peer->transfer);
1641 return;
1642 }
1643 freedcpeer(peer);
1644}
1645
1646static void cmd_maxedout(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1647{
1648 if((peer->transfer != NULL) && (peer->transfer->dir == TRNSD_DOWN))
1649 {
1650 transferseterror(peer->transfer, TRNSE_NOSLOTS);
1651 resettransfer(peer->transfer);
1652 return;
1653 }
1654 freedcpeer(peer);
1655}
1656
1657static struct
1658{
1659 char *name;
1660 char **file;
1661 void (*func)(void);
1662} lists[] =
1663{
1664 {"MyList.DcLst", &hmlistname, updatehmlist},
1665 {"files.xml", &xmllistname, updatexmllist},
1666 {"files.xml.bz2", &xmlbz2listname, updatexmlbz2list},
1667 {NULL, NULL}
1668};
1669
1670static int openfilelist(char *name)
1671{
1672 int i, fd;
1673 int errnobak;
1674
1675 for(i = 0; lists[i].name != NULL; i++)
1676 {
1677 if(!strcmp(name, lists[i].name))
1678 break;
1679 }
1680 errno = 0;
1681 if(lists[i].name == NULL)
1682 return(-1);
1683 fd = -1;
1684 if((*lists[i].file == NULL) || ((fd = open(*lists[i].file, O_RDONLY)) < 0))
1685 lists[i].func();
1686 if((fd < 0) && ((*lists[i].file == NULL) || ((fd = open(*lists[i].file, O_RDONLY)) < 0)))
1687 {
1688 errnobak = errno;
1689 flog(LOG_ERR, "could not open filelist tempfile: %s", strerror(errno));
1690 errno = errnobak;
1691 return(-1);
1692 }
1693 return(fd);
1694}
1695
1696static struct sharecache *findbytth(char *tth32)
1697{
1698 char *buf;
1699 size_t buflen;
1700 struct sharecache *node;
1701
1702 if((buf = base32decode(tth32, &buflen)) == NULL)
1703 return(NULL);
1704 if(buflen != 24)
1705 {
1706 free(buf);
1707 return(NULL);
1708 }
1709 for(node = shareroot->child; node != NULL; node = nextscnode(node))
1710 {
1711 if(node->f.b.hastth && !memcmp(node->hashtth, buf, 24))
1712 break;
1713 }
1714 free(buf);
1715 return(node);
1716}
1717
1718static struct sharecache *resdcpath(char *path, char *charset, char sep)
1719{
1720 struct sharecache *node;
1721 char *p, *p2;
1722
1723 node = shareroot;
1724 p = path;
1725 while(p != NULL)
1726 {
1727 if((p2 = strchr(p, sep)) != NULL)
1728 *(p2++) = 0;
1729 if((node = findcache(node, icsmbstowcs(p, charset, L""))) == NULL)
1730 return(NULL);
1731 p = p2;
1732 }
1733 return(node);
1734}
1735
1736static void cmd_get(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1737{
1738 int offset;
1739 char *p, *buf;
1740 wchar_t *buf2;
1741 struct sharecache *node;
1742 struct socket *lesk;
1743 int fd;
1744 struct stat sb;
1745
1746 if(peer->transfer == NULL)
1747 {
1748 freedcpeer(peer);
1749 return;
1750 }
1751 if((p = strchr(args, '$')) == NULL)
1752 {
1753 freedcpeer(peer);
1754 return;
1755 }
1756 *(p++) = 0;
1757 if((offset = (atoi(p) - 1)) < 0)
1758 {
1759 freedcpeer(peer);
1760 return;
1761 }
1762 if(((fd = openfilelist(args)) < 0) && (errno != 0))
1763 {
1764 qstr(sk, "$Error Could not send file list|");
1765 freedcpeer(peer);
1766 return;
1767 } else if(fd >= 0) {
1768 if((buf2 = icsmbstowcs(args, DCCHARSET, NULL)) != NULL)
1769 transfersetpath(peer->transfer, buf2);
1770 }
1771 if(fd < 0)
1772 {
1773 if(slotsleft() < 1)
1774 {
1775 qstr(sk, "$MaxedOut|");
1776 freedcpeer(peer);
1777 return;
1778 }
1779 if((node = resdcpath(args, DCCHARSET, '\\')) == NULL)
1780 {
1781 qstrf(sk, "$Error File not in share|");
1782 freedcpeer(peer);
1783 return;
1784 }
1785 if((fd = opensharecache(node)) < 0)
1786 {
1787 qstrf(sk, "$Error %s|", strerror(errno));
1788 freedcpeer(peer);
1789 return;
1790 }
1791 buf = getfspath(node);
1792 if((buf2 = icsmbstowcs(buf, NULL, NULL)) == NULL)
1793 flog(LOG_WARNING, "could not convert native path into a wcs (%s): %s", buf, strerror(errno));
1794 else
1795 transfersetpath(peer->transfer, buf2);
1796 free(buf);
1797 }
1798 if(fstat(fd, &sb) < 0)
1799 {
1800 close(fd);
1801 flog(LOG_WARNING, "could not stat file %ls: %s", node->name, strerror(errno));
1802 qstrf(sk, "$Error|");
1803 freedcpeer(peer);
1804 return;
1805 }
1806 if((offset != 0) && (lseek(fd, offset, SEEK_SET) < 0))
1807 {
1808 close(fd);
1809 qstrf(sk, "$Error Offset out of range|");
1810 freedcpeer(peer);
1811 return;
1812 }
1813 lesk = wrapsock(fd);
1814 transferprepul(peer->transfer, sb.st_size, offset, -1, lesk);
1815 putsock(lesk);
1816 qstrf(sk, "$FileLength %i|", peer->transfer->size);
d3372da9 1817}
1818
1819static void cmd_send(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1820{
1821 if(peer->transfer == NULL)
1822 {
1823 freedcpeer(peer);
1824 return;
1825 }
1826 if(peer->transfer->localend == NULL)
1827 {
1828 freedcpeer(peer);
1829 return;
1830 }
1831 peer->ptclose = 1;
9a2d6cb8 1832 startul(peer);
d3372da9 1833}
1834
1835static void cmd_supports(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1836{
1837 int i;
1838 char *p, *p2;
1839 char **arr;
1840 size_t arrsize, arrdata;
1841
1842 if(peer->supports != NULL)
1843 {
1844 for(i = 0; peer->supports[i] != NULL; i++)
1845 free(peer->supports[i]);
1846 free(peer->supports);
1847 }
1848 arr = NULL;
1849 arrsize = arrdata = 0;
1850 p = args;
1851 do
1852 {
1853 if((p2 = strchr(p, ' ')) != NULL)
1854 *(p2++) = 0;
1855 if(*p == 0)
1856 continue;
1857 addtobuf(arr, sstrdup(p));
1858 } while((p = p2) != NULL);
1859 addtobuf(arr, NULL);
1860 peer->supports = arr;
d3372da9 1861}
1862
1863static void cmd_getblock(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1864{
1865 int fd;
1866 char *p, *p2;
1867 int start, numbytes;
1868 char *charset, *buf;
1869 wchar_t *buf2;
1870 struct sharecache *node;
1871 struct stat sb;
1872 struct socket *lesk;
1873
1874 if(peer->transfer == NULL)
1875 {
1876 freedcpeer(peer);
1877 return;
1878 }
1879 p = args;
1880 if((p2 = strchr(p, ' ')) == NULL)
1881 {
1882 freedcpeer(peer);
1883 return;
1884 }
1885 *(p2++) = 0;
1886 start = atoi(p);
1887 p = p2;
1888 if((p2 = strchr(p, ' ')) == NULL)
1889 {
1890 freedcpeer(peer);
1891 return;
1892 }
1893 *(p2++) = 0;
1894 numbytes = atoi(p);
1895 p = p2;
1896 if(!strcmp(cmd, "$UGetBlock") || !strcmp(cmd, "$UGetZBlock"))
1897 charset = "UTF-8";
1898 else
1899 charset = DCCHARSET;
1900 if(!strcmp(cmd, "$GetZBlock") || !strcmp(cmd, "$UGetZBlock"))
1901 initcompress(peer, CPRS_ZLIB);
1902 if(((fd = openfilelist(p)) < 0) && (errno != 0))
1903 {
1904 qstr(sk, "$Error Could not send file list|");
1905 return;
1906 } else if(fd >= 0) {
1907 if((buf2 = icsmbstowcs(args, charset, NULL)) != NULL)
1908 transfersetpath(peer->transfer, buf2);
1909 }
1910 if(fd < 0)
1911 {
1912 if(slotsleft() < 1)
1913 {
1914 qstr(sk, "$MaxedOut|");
1915 return;
1916 }
1917 if((node = resdcpath(p, charset, '\\')) == NULL)
1918 {
1919 qstr(sk, "$Error File not in cache|");
1920 return;
1921 }
1922 if((fd = opensharecache(node)) < 0)
1923 {
1924 qstrf(sk, "$Error %s|", strerror(errno));
1925 return;
1926 }
1927 buf = getfspath(node);
1928 if((buf2 = icsmbstowcs(buf, NULL, NULL)) == NULL)
1929 flog(LOG_WARNING, "could not convert native path into a wcs (%s): %s", buf, strerror(errno));
1930 else
1931 transfersetpath(peer->transfer, buf2);
1932 free(buf);
1933 }
1934 if(fstat(fd, &sb) < 0)
1935 {
1936 close(fd);
1937 flog(LOG_WARNING, "could not stat file %ls: %s", node->name, strerror(errno));
1938 qstr(sk, "$Error|");
1939 return;
1940 }
1941 if((start != 0) && ((start >= sb.st_size) || (lseek(fd, start, SEEK_SET) < 0)))
1942 {
1943 close(fd);
1944 qstr(sk, "$Error Offset out of range|");
1945 return;
1946 }
1947 if((numbytes < 0) || (start + numbytes > sb.st_size))
1948 numbytes = sb.st_size - start;
1949 lesk = wrapsock(fd);
1950 transferprepul(peer->transfer, sb.st_size, start, start + numbytes, lesk);
1951 putsock(lesk);
1952 qstrf(sk, "$Sending %i|", numbytes);
9a2d6cb8 1953 startul(peer);
d3372da9 1954}
1955
1956static void cmd_adcget(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1957{
1958 int i;
1959 char **argv, *buf;
1960 int start, numbytes;
1961 struct sharecache *node;
1962 struct stat sb;
1963 struct socket *lesk;
1964 wchar_t *wbuf;
1965 int fd;
1966
1967 if(peer->transfer == NULL)
1968 {
1969 freedcpeer(peer);
1970 return;
1971 }
1972 if((argv = parseadc(args)) == NULL)
1973 {
1974 freedcpeer(peer);
1975 return;
1976 }
1977 if(parrlen(argv) < 4)
1978 {
1979 freedcpeer(peer);
1980 goto out;
1981 }
1982 start = atoi(argv[2]);
1983 numbytes = atoi(argv[3]);
1984 node = NULL;
1985 fd = -1;
1986 if(((fd = openfilelist(argv[1])) < 0) && (errno != 0))
1987 {
1988 qstr(sk, "$Error Could not send file list|");
1989 goto out;
1990 } else if(fd >= 0) {
1991 if((wbuf = icsmbstowcs(argv[1], "UTF-8", NULL)) != NULL)
1992 transfersetpath(peer->transfer, wbuf);
1993 }
1994 if(fd < 0)
1995 {
1996 if(slotsleft() < 1)
1997 {
1998 qstr(sk, "$MaxedOut|");
1999 goto out;
2000 }
2001 if(!strncmp(argv[1], "TTH/", 4))
2002 {
2003 if((node = findbytth(argv[1] + 4)) == NULL)
2004 {
2005 qstr(sk, "$Error File not in cache|");
2006 goto out;
2007 }
2008 } else {
9a2d6cb8 2009 if((node = resdcpath((argv[1][0] == '/')?(argv[1] + 1):(argv[1]), "UTF-8", '/')) == NULL)
d3372da9 2010 {
2011 qstr(sk, "$Error File not in cache|");
2012 goto out;
2013 }
2014 }
2015 if((fd = opensharecache(node)) < 0)
2016 {
2017 qstrf(sk, "$Error %s|", strerror(errno));
2018 goto out;
2019 }
2020 buf = getfspath(node);
2021 if((wbuf = icsmbstowcs(buf, NULL, NULL)) == NULL)
2022 flog(LOG_WARNING, "could not convert native path into a wcs (%s): %s", buf, strerror(errno));
2023 else
2024 transfersetpath(peer->transfer, wbuf);
2025 free(buf);
2026 }
2027 if(!strcmp(argv[0], "file"))
2028 {
2029 for(i = 4; argv[i] != NULL; i++)
2030 {
2031 if(!strcmp(argv[i], "ZL1"))
2032 initcompress(peer, CPRS_ZLIB);
2033 }
2034 if(fstat(fd, &sb) < 0)
2035 {
2036 flog(LOG_WARNING, "could not stat file %ls: %s", node->name, strerror(errno));
2037 qstr(sk, "$Error|");
2038 goto out;
2039 }
2040 if((start != 0) && ((start >= sb.st_size) || (lseek(fd, start, SEEK_SET) < 0)))
2041 {
2042 qstr(sk, "$Error Offset out of range|");
2043 goto out;
2044 }
2045 if((numbytes < 0) || (start + numbytes > sb.st_size))
2046 numbytes = sb.st_size - start;
2047 lesk = wrapsock(fd);
2048 transferprepul(peer->transfer, sb.st_size, start, start + numbytes, lesk);
2049 putsock(lesk);
2050 fd = -1;
2051 qstr(sk, "$ADCSND");
2052 sendadc(sk, "file");
2053 sendadc(sk, argv[1]);
2054 sendadcf(sk, "%i", start);
2055 sendadcf(sk, "%i", numbytes);
2056 if(peer->compress == CPRS_ZLIB)
2057 sendadc(sk, "ZL1");
2058 qstr(sk, "|");
9a2d6cb8 2059 startul(peer);
d3372da9 2060 } else if(!strcmp(argv[0], "tthl")) {
2061 /*
2062 * XXX: Implement full TTHL support.
2063 *
2064 * In the meantime, this is better than nothing, since it at
2065 * least allows fetching of the TTH root if it isn't already
2066 * known.
2067 */
2068 if(node == NULL)
2069 {
2070 qstr(sk, "$Error no TTHL data for virtual files|");
2071 goto out;
2072 }
2073 qstr(sk, "$ADCSND");
2074 sendadc(sk, "tthl");
2075 sendadc(sk, argv[1]);
2076 sendadc(sk, "0");
2077 sendadc(sk, "24");
2078 qstr(sk, "|");
2079 sockqueue(sk, node->hashtth, 24);
2080 } else {
2081 qstr(sk, "$Error Namespace not implemented|");
2082 goto out;
2083 }
d3372da9 2084
2085 out:
2086 if(fd >= 0)
2087 close(fd);
2088 freeparr(argv);
2089}
2090
9a2d6cb8 2091static void handletthl(struct dcpeer *peer)
2092{
2093 char buf[24];
2094
2095 while(peer->inbufdata >= 24)
2096 {
2097 pushtigertree(&peer->tth, peer->inbuf);
2098 memmove(peer->inbuf, peer->inbuf + 24, peer->inbufdata -= 24);
e52006fe 2099 peer->curread += 24;
9a2d6cb8 2100 }
e52006fe 2101 if(peer->curread >= peer->totalsize)
9a2d6cb8 2102 {
2103 peer->state = PEER_CMD;
2104 synctigertree(&peer->tth);
2105 restigertree(&peer->tth, buf);
2106 transfersethash(peer->transfer, newhash(L"TTH", 24, buf));
2107 requestfile(peer);
2108 }
2109}
2110
2111static void cmd_adcsnd(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
2112{
2113 char **argv;
2114 int start, numbytes;
2115
2116 if(peer->transfer == NULL)
2117 {
2118 freedcpeer(peer);
2119 return;
2120 }
2121 if((argv = parseadc(args)) == NULL)
2122 {
2123 freedcpeer(peer);
2124 return;
2125 }
2126 if(parrlen(argv) < 4)
2127 {
2128 freedcpeer(peer);
2129 goto out;
2130 }
2131 start = atoi(argv[2]);
2132 numbytes = atoi(argv[3]);
2133 if(!strcmp(argv[0], "tthl"))
2134 {
2135 if((start != 0) || (numbytes % 24 != 0))
2136 {
2137 /* Weird. Bail out. */
2138 freedcpeer(peer);
2139 goto out;
2140 }
2141 peer->state = PEER_TTHL;
2142 peer->totalsize = numbytes;
2143 peer->curread = 0;
2144 inittigertree(&peer->tth);
2145 handletthl(peer);
2146 } else if(!strcmp(argv[0], "file")) {
2147 if(start != peer->transfer->curpos)
2148 {
2149 freedcpeer(peer);
2150 goto out;
2151 }
2152 if(start + numbytes != peer->transfer->size)
2153 {
2154 transfersetsize(peer->transfer, start + numbytes);
2155 freedcpeer(peer);
2156 goto out;
2157 }
2158 startdl(peer);
e52006fe 2159 if(peer->inbufdata > 0)
2160 {
2161 sockpushdata(sk, peer->inbuf, peer->inbufdata);
2162 peer->inbufdata = 0;
2163 transread(sk, peer);
2164 }
9a2d6cb8 2165 } else {
2166 /* We certainly didn't request this...*/
2167 freedcpeer(peer);
2168 goto out;
2169 }
2170
2171 out:
2172 freeparr(argv);
2173}
2174
2175static void cmd_sending(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
2176{
2177 int numbytes;
2178
2179 if(peer->transfer == NULL)
2180 {
2181 freedcpeer(peer);
2182 return;
2183 }
2184 numbytes = atoi(args);
2185 if(peer->transfer->size - peer->transfer->curpos != numbytes)
2186 {
2187 transfersetsize(peer->transfer, peer->transfer->curpos + numbytes);
2188 freedcpeer(peer);
2189 return;
2190 }
2191 startdl(peer);
0d8c93cb 2192 if(peer->inbufdata > 0)
2193 {
2194 sockpushdata(sk, peer->inbuf, peer->inbufdata);
2195 peer->inbufdata = 0;
2196 transread(sk, peer);
2197 }
9a2d6cb8 2198}
2199
d3372da9 2200/*
2201Hub skeleton:
2202static void cmd_(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
2203{
2204 struct dchub *hub;
2205
2206 hub = fn->data;
2207 hubhandleaction(sk, fn, cmd, args);
2208}
2209
2210Peer skeleton:
2211static void cmd_(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
2212{
d3372da9 2213}
2214
2215*/
2216
2217static int hubreqconn(struct fnetpeer *peer)
2218{
2219 struct dchub *hub;
2220 char *mbsnick;
2221
2222 if((peer->fn->state != FNN_EST) || (peer->fn->fnet != &dcnet))
2223 {
2224 errno = EINVAL;
2225 return(1);
2226 }
2227 if((hub = peer->fn->data) == NULL)
2228 {
2229 errno = EFAULT;
2230 return(1);
2231 }
2232 if((mbsnick = icwcstombs(peer->id, DCCHARSET)) == NULL)
2233 return(1); /* Shouldn't happen, of course, but who knows... */
2234 if(tcpsock != NULL)
2235 {
2236 sendctm(peer->fn->sk, mbsnick);
2237 expectpeer(mbsnick, peer->fn);
2238 } else {
2239 qstrf(peer->fn->sk, "$RevConnectToMe %s %s|", hub->nativenick, mbsnick);
2240 }
2241 free(mbsnick);
2242 return(0);
2243}
2244
2245static int hubsendchat(struct fnetnode *fn, int public, wchar_t *to, wchar_t *string)
2246{
2247 struct dchub *hub;
2248 char *mbsstring, *mbsto;
2249
2250 hub = fn->data;
2251 if((mbsto = icwcstombs(to, DCCHARSET)) == NULL)
2252 {
2253 errno = EILSEQ;
2254 return(1);
2255 }
2256 if((mbsstring = icwcstombs(string, DCCHARSET)) == NULL)
2257 {
2258 errno = EILSEQ;
2259 return(1);
2260 }
2261 if((strchr(mbsto, '|') != NULL) || (strchr(mbsto, ' ') != NULL))
2262 {
2263 free(mbsto);
2264 free(mbsstring);
2265 errno = ESRCH;
2266 return(1);
2267 }
2268 if(strchr(mbsstring, '|') != NULL)
2269 {
2270 free(mbsto);
2271 free(mbsstring);
2272 errno = EILSEQ;
2273 return(1);
2274 }
2275 if(public)
2276 {
2277 if(*to == L'\0')
2278 {
2279 qstrf(fn->sk, "<%s> %s|", hub->nativenick, mbsstring);
2280 } else {
2281 qstrf(fn->sk, "$To: %s From: %s $<%s> %s|", mbsto, hub->nativenick, hub->nativenick, mbsstring);
2282 }
2283 } else {
2284 qstrf(fn->sk, "$To: %s From: %s $<%s> %s|", mbsto, hub->nativenick, hub->nativenick, mbsstring);
2285 }
2286 free(mbsto);
2287 free(mbsstring);
2288 return(0);
2289}
2290
2291static void findsizelimit(struct sexpr *sexpr, int *min, int *max)
2292{
2293 int minl, maxl, minr, maxr, retmin, retmax;
2294
2295 switch(sexpr->op)
2296 {
2297 case SOP_AND:
2298 findsizelimit(sexpr->l, &minl, &maxl);
2299 findsizelimit(sexpr->r, &minr, &maxr);
2300 retmin = (minl > minr)?minl:minr;
2301 if((maxl != -1) && (maxr != -1))
2302 retmax = (maxl < maxr)?maxl:maxr;
2303 else if(maxl != -1)
2304 retmax = maxl;
2305 else if(maxr != -1)
2306 retmax = maxr;
2307 else
2308 retmax = -1;
2309 break;
2310 case SOP_OR:
2311 findsizelimit(sexpr->l, &minl, &maxl);
2312 findsizelimit(sexpr->r, &minr, &maxr);
2313 retmin = (minl < minr)?minl:minr;
2314 if((maxl == -1) || (maxr == -1))
2315 retmax = -1;
2316 else
2317 retmax = (maxl > maxr)?maxl:maxr;
2318 break;
2319 case SOP_NOT:
2320 findsizelimit(sexpr->l, &minl, &maxl);
2321 if((minl == 0) && (maxl == -1)) /* Interval is unspecified */
2322 {
2323 retmin = 0;
2324 retmax = -1;
2325 } else if((minl == 0) && (maxl != -1)) {
2326 retmin = maxl + 1;
2327 retmax = -1;
2328 } else if((minl != 0) && (maxl == -1)) {
2329 retmin = 0;
2330 retmax = minl - 1;
2331 } else { /* This would yield two seperate intervals, which DC cannot handle */
2332 retmin = 0;
2333 retmax = -1;
2334 }
2335 case SOP_SIZELT:
2336 retmin = 0;
2337 retmax = sexpr->d.n - 1;
2338 break;
2339 case SOP_SIZEEQ:
2340 retmin = sexpr->d.n;
2341 retmax = sexpr->d.n;
2342 break;
2343 case SOP_SIZEGT:
2344 retmin = sexpr->d.n + 1;
2345 retmax = -1;
2346 break;
2347 default:
2348 retmin = 0;
2349 retmax = -1;
2350 break;
2351 }
2352 if(min != NULL)
2353 *min = retmin;
2354 if(max != NULL)
2355 *max = retmax;
2356}
2357
9d8cf743 2358static struct hash *findsehash(struct sexpr *sexpr)
2359{
2360 struct hash *h1, *h2;
2361
2362 switch(sexpr->op)
2363 {
2364 case SOP_AND:
2365 if((h1 = findsehash(sexpr->l)) != NULL)
2366 return(h1);
2367 if((h1 = findsehash(sexpr->r)) != NULL)
2368 return(h1);
2369 break;
2370 case SOP_OR:
2371 h1 = findsehash(sexpr->l);
2372 h2 = findsehash(sexpr->r);
2373 if(hashcmp(h1, h2))
2374 return(h1);
2375 break;
2376 case SOP_HASHIS:
2377 if(!wcscmp(sexpr->d.hash->algo, L"TTH"))
2378 return(sexpr->d.hash);
2379 default:
2380 break;
2381 }
2382 return(NULL);
2383}
2384
d3372da9 2385static int hubsearch(struct fnetnode *fn, struct search *srch, struct srchfnnlist *ln)
2386{
2387 struct dchub *hub;
2388 struct wcslist *list, *cur;
2389 char *sstr, *buf, *p;
2390 size_t sstrsize, sstrdata;
2391 struct sockaddr *name;
2392 socklen_t namelen;
2393 int minsize, maxsize;
9d8cf743 2394 struct hash *hash;
d3372da9 2395
2396 hub = fn->data;
2397 if((fn->state != FNN_EST) || (fn->sk == NULL) || (fn->sk->state != SOCK_EST))
2398 return(1);
2399 list = findsexprstrs(srch->sexpr);
2400 findsizelimit(srch->sexpr, &minsize, &maxsize);
9d8cf743 2401 hash = findsehash(srch->sexpr);
d3372da9 2402 if((minsize != 0) && (maxsize != -1))
2403 {
2404 /* Choose either minsize or maxsize by trying to determine
2405 * which choice will be most restrictive. The result can be
2406 * approximative at best anyway, so don't try too hard... */
2407 if((50000000 - maxsize) > (minsize - 50000000))
2408 minsize = 0;
2409 else
2410 maxsize = -1;
2411 }
d3372da9 2412 sstr = NULL;
2413 sstrsize = sstrdata = 0;
9d8cf743 2414 if((hash != NULL) && (hash->len == 24))
d3372da9 2415 {
9d8cf743 2416 /* Prioritize hash searches above all else */
2417 bufcat(sstr, "F?T?0?9?TTH:", 12);
2418 buf = base32encode(hash->buf, hash->len);
2419
2420 bufcat(sstr, buf, 39);
2421 free(buf);
2422 } else {
2423 if(minsize != 0)
d3372da9 2424 {
9d8cf743 2425 sizebuf2(sstr, sstrdata + 32, 1);
2426 snprintf(sstr + sstrdata, sstrsize - sstrdata, "T?F?%i?1?", minsize);
2427 } else if(maxsize != -1) {
2428 sizebuf2(sstr, sstrdata + 32, 1);
2429 snprintf(sstr + sstrdata, sstrsize - sstrdata, "T?T?%i?1?", maxsize);
2430 } else {
2431 bufcat(sstr, "F?F?0?1?", 8);
2432 }
2433 if(list != NULL)
2434 {
2435 for(cur = list; cur != NULL; cur = cur->next)
d3372da9 2436 {
9d8cf743 2437 if((buf = icwcstombs(cur->str, DCCHARSET)) == NULL)
2438 {
2439 /* Can't find anything anyway if the search expression
2440 * requires characters outside DC's charset. There's
2441 * nothing technically wrong with the search itself,
2442 * however, so return success. This should be
2443 * considered as an optimization. */
2444 freesl(&list);
2445 if(sstr != NULL)
2446 free(sstr);
2447 return(0);
2448 }
2449 if(cur != list)
2450 addtobuf(sstr, '$');
2451 /*
2452 * It probably doesn't hurt if buf contains any extra
2453 * dollar signs - it will just result in extra search
2454 * terms, and the extraneous results will be filtered by
2455 * the search layer anyway. It hurts if it contains any
2456 * pipes, though, so let's sell them for money.
2457 */
2458 for(p = buf; *p; p++)
2459 {
2460 if(*p == '|')
2461 *p = '$';
2462 }
2463 bufcat(sstr, buf, strlen(buf));
2464 free(buf);
d3372da9 2465 }
9d8cf743 2466 } else {
2467 /* Will match all files... :-/ */
2468 addtobuf(sstr, '.');
d3372da9 2469 }
d3372da9 2470 }
2471 addtobuf(sstr, 0);
2472 if(tcpsock != NULL)
2473 {
2474 if(sockgetremotename(udpsock, &name, &namelen) < 0)
2475 {
2476 flog(LOG_WARNING, "cannot get address of UDP socket");
2477 } else {
9d8cf743 2478 qstrf(fn->sk, "$Search %s %s|", formataddress(name, namelen), sstr);
d3372da9 2479 free(name);
2480 }
2481 } else {
9d8cf743 2482 qstrf(fn->sk, "$Search Hub:%s %s|", hub->nativenick, sstr);
d3372da9 2483 }
2484 free(sstr);
2485 freesl(&list);
2486 fn->lastsrch = time(NULL);
2487 return(0);
2488}
2489
2490#undef skipcmd
2491#undef qstr
2492#undef qstrf
2493
2494#define cc(c) ((void (*)(struct socket *, void *, char *, char *))(c))
2495struct command hubcmds[] =
2496{
2497 {"$Lock", cc(cmd_lock)},
2498 {"$HubName", cc(cmd_hubname)},
2499 {"$Hello", cc(cmd_hello)},
2500 {"$Quit", cc(cmd_quit)},
2501 {"$NickList", cc(cmd_nicklist)},
2502 {"$OpList", cc(cmd_oplist)},
2503 {"$MyINFO", cc(cmd_myinfo)},
2504 {"$ForceMove", cc(cmd_forcemove)},
2505 {"$Search", cc(cmd_search)},
2506 {"$MultiSearch", cc(cmd_search)},
2507 {"$ConnectToMe", cc(cmd_connecttome)},
2508 {"$RevConnectToMe", cc(cmd_revconnecttome)},
2509 {"$GetNetInfo", cc(cmd_getnetinfo)},
2510 {"$To:", cc(cmd_to)},
2511 {"$SR", cc(cmd_sr)},
2512 {"$UserCommand", cc(cmd_usercommand)},
48509089 2513 {"$GetPass", cc(cmd_getpass)},
c9b3ad74 2514 {"$LogedIn", cc(cmd_logedin)}, /* sic */
d3372da9 2515 {NULL, NULL}
2516};
2517
2518struct command peercmds[] =
2519{
2520 {"$MyNick", cc(cmd_mynick)},
2521 {"$Lock", cc(cmd_peerlock)},
2522 {"$Direction", cc(cmd_direction)},
2523 {"$Key", cc(cmd_key)},
2524 {"$FileLength", cc(cmd_filelength)},
2525 {"$Error", cc(cmd_error)},
2526 {"$MaxedOut", cc(cmd_maxedout)},
2527 {"$Get", cc(cmd_get)},
2528 {"$Send", cc(cmd_send)},
2529 {"$Supports", cc(cmd_supports)},
2530 {"$GetBlock", cc(cmd_getblock)},
2531 {"$UGetBlock", cc(cmd_getblock)},
2532 {"$GetZBlock", cc(cmd_getblock)},
2533 {"$UGetZBlock", cc(cmd_getblock)},
2534 {"$ADCGET", cc(cmd_adcget)},
9a2d6cb8 2535 {"$ADCSND", cc(cmd_adcsnd), 1},
2536 {"$Sending", cc(cmd_sending), 1},
d3372da9 2537 {NULL, NULL}
2538};
2539#undef cc
2540
2541static void dctransdetach(struct transfer *transfer, struct dcpeer *peer)
2542{
2543 CBUNREG(transfer, trans_filterout, peer);
2544 if(peer->freeing)
2545 return;
2546 peer->transfer = NULL;
2547 freedcpeer(peer);
2548}
2549
2550static void dctransgotdata(struct transfer *transfer, struct dcpeer *peer)
2551{
2552 int ret;
2553 void *buf;
2554 char outbuf[1024];
2555 z_stream *cstr;
2556 size_t bufsize;
2557
2558 if((peer->state == PEER_TRNS) || (peer->state == PEER_SYNC))
2559 {
2560 if(sockqueuesize(peer->sk) < 65536)
2561 {
2562 if((buf = transfergetdata(transfer, &bufsize)) != NULL)
2563 {
2564 if(peer->compress == CPRS_NONE)
2565 {
2566 sockqueue(peer->sk, buf, bufsize);
2567 } else if(peer->compress == CPRS_ZLIB) {
2568 cstr = peer->cprsdata;
2569 cstr->next_in = buf;
2570 cstr->avail_in = bufsize;
2571 while(cstr->avail_in > 0)
2572 {
2573 cstr->next_out = outbuf;
2574 cstr->avail_out = sizeof(outbuf);
2575 if((ret = deflate(cstr, 0)) != Z_OK)
2576 {
2577 flog(LOG_WARNING, "bug? deflate() did not return Z_OK (but rather %i)", ret);
2578 freedcpeer(peer);
2579 return;
2580 }
2581 sockqueue(peer->sk, outbuf, sizeof(outbuf) - cstr->avail_out);
2582 }
2583 }
2584 free(buf);
2585 }
2586 if(peer->state == PEER_SYNC)
2587 {
2588 if(peer->compress == CPRS_ZLIB)
2589 {
2590 cstr = peer->cprsdata;
2591 cstr->next_in = NULL;
2592 cstr->avail_in = 0;
2593 do
2594 {
2595 cstr->next_out = outbuf;
2596 cstr->avail_out = sizeof(outbuf);
2597 ret = deflate(cstr, Z_FINISH);
2598 if((ret != Z_OK) && (ret != Z_STREAM_END))
2599 {
2600 flog(LOG_WARNING, "bug? deflate(Z_FINISH) did not return Z_OK (but rather %i)", ret);
2601 freedcpeer(peer);
2602 return;
2603 }
2604 sockqueue(peer->sk, outbuf, sizeof(outbuf) - cstr->avail_out);
2605 } while(ret != Z_STREAM_END);
2606 }
2607 if(peer->ptclose)
2608 {
2609 freedcpeer(peer);
2610 } else {
2611 peer->state = PEER_CMD;
2612 endcompress(peer);
2613 transfersetstate(transfer, TRNS_HS);
2614 socksettos(peer->sk, confgetint("fnet", "fnptos"));
2615 peer->sk->writecb = NULL;
2616 }
2617 }
2618 }
2619 }
2620}
2621
2622static void dctransendofdata(struct transfer *transfer, struct dcpeer *peer)
2623{
2624 peer->state = PEER_SYNC;
2625 dctransgotdata(transfer, peer);
2626}
2627
2628static void dcwantdata(struct transfer *transfer, struct dcpeer *peer)
2629{
2630 if(transferdatasize(transfer) < 65536)
2631 peer->sk->ignread = 0;
2632}
2633
2634static void transread(struct socket *sk, struct dcpeer *peer)
2635{
2636 void *buf;
2637 size_t bufsize;
2638 struct transfer *transfer;
2639
2640 if((buf = sockgetinbuf(sk, &bufsize)) == NULL)
2641 return;
2642 if(peer->transfer == NULL)
2643 {
2644 free(buf);
2645 freedcpeer(peer);
2646 return;
2647 }
2648 transferputdata(peer->transfer, buf, bufsize);
2649 free(buf);
2650 if(peer->transfer->curpos >= peer->transfer->size)
2651 {
2652 transfer = peer->transfer;
2653 transferdetach(transfer);
2654 transferendofdata(transfer);
2655 return;
2656 }
2657 if(transferdatasize(peer->transfer) > 65535)
2658 sk->ignread = 1;
2659}
2660
2661static void transerr(struct socket *sk, int err, struct dcpeer *peer)
2662{
2663 struct transfer *transfer;
2664
2665 if((transfer = peer->transfer) == NULL)
2666 {
2667 freedcpeer(peer);
2668 return;
2669 }
2670 transferdetach(transfer);
2671 transferendofdata(transfer);
2672}
2673
2674static void transwrite(struct socket *sk, struct dcpeer *peer)
2675{
2676 if((peer->state != PEER_TRNS) && (peer->state != PEER_SYNC))
2677 return;
2678 if(peer->transfer == NULL)
2679 {
2680 freedcpeer(peer);
2681 return;
2682 }
2683 dctransgotdata(peer->transfer, peer);
2684}
2685
2686static void udpread(struct socket *sk, void *data)
2687{
d86b7a9f 2688 char *buf, *p, *p2, *hashbuf;
2689 size_t buflen, hashlen;
d3372da9 2690 char *nick, *filename, *hubname;
2691 int size, slots;
2692 struct fnetnode *fn, *myfn;
2693 struct dchub *hub;
2694 struct srchres *sr;
2695 wchar_t *wnick, *wfile;
d86b7a9f 2696 struct hash *hash;
d3372da9 2697
2698 if((buf = sockgetinbuf(sk, &buflen)) == NULL)
2699 return;
2700 buf = srealloc(buf, buflen + 1);
2701 buf[buflen] = 0;
2702 if(!strncmp(buf, "$SR ", 4))
2703 {
2704 p = buf + 4;
2705 nick = p;
2706 if((p2 = strchr(p, ' ')) == NULL)
2707 {
2708 free(buf);
2709 return;
2710 }
2711 *p2 = 0;
2712 p = p2 + 1;
2713 filename = p;
2714 if((p2 = strchr(p, 5)) == NULL)
2715 {
2716 free(buf);
2717 return;
2718 }
2719 *p2 = 0;
2720 p = p2 + 1;
2721 if((p2 = strchr(p, ' ')) == NULL)
2722 {
2723 free(buf);
2724 return;
2725 }
2726 *p2 = 0;
2727 size = atoi(p);
2728 p = p2 + 1;
2729 if((p2 = strchr(p, '/')) == NULL)
2730 {
2731 free(buf);
2732 return;
2733 }
2734 *p2 = 0;
2735 slots = atoi(p);
2736 p = p2 + 1;
2737 if((p2 = strchr(p, 5)) == NULL)
2738 {
2739 free(buf);
2740 return;
2741 }
2742 p = p2 + 1;
2743 hubname = p;
2744 if((p2 = strstr(p, " (")) == NULL)
2745 {
2746 free(buf);
2747 return;
2748 }
2749 *p2 = 0;
2750 if((wnick = icmbstowcs(nick, DCCHARSET)) == NULL)
2751 {
2752 free(buf);
2753 return;
2754 }
2755 if((wfile = icmbstowcs(filename, DCCHARSET)) == NULL)
2756 {
2757 free(wnick);
2758 free(buf);
2759 return;
2760 }
2761 myfn = NULL;
d86b7a9f 2762 hash = NULL;
2763 if(!strncmp(hubname, "TTH:", 4))
d3372da9 2764 {
d86b7a9f 2765 if((hashbuf = base32decode(hubname + 4, &hashlen)) != NULL)
2766 {
2767 if(hashlen == 24)
2768 hash = newhash(L"TTH", 24, hashbuf);
2769 free(hashbuf);
2770 }
2771 } else {
2772 for(fn = fnetnodes; fn != NULL; fn = fn->next)
d3372da9 2773 {
d86b7a9f 2774 if((fn->fnet == &dcnet) && ((hub = fn->data) != NULL))
d3372da9 2775 {
d86b7a9f 2776 if((hub->nativename != NULL) && !strcmp(hub->nativename, hubname))
d3372da9 2777 {
d86b7a9f 2778 if(myfn == NULL)
2779 {
2780 myfn = fn;
2781 } else {
2782 myfn = NULL;
2783 break;
2784 }
d3372da9 2785 }
2786 }
2787 }
2788 }
2789 sr = newsrchres(&dcnet, wfile, wnick);
2790 if(sr->peernick != NULL)
2791 free(sr->peernick);
2792 sr->peernick = swcsdup(wnick);
2793 sr->size = size;
2794 sr->slots = slots;
2795 free(wfile);
2796 free(wnick);
2797 if(myfn != NULL)
2798 getfnetnode(sr->fn = myfn);
d86b7a9f 2799 if(hash != NULL)
2800 sr->hash = hash;
d3372da9 2801 submitsrchres(sr);
2802 freesrchres(sr);
2803 }
2804 free(buf);
2805}
2806
2807static void hubread(struct socket *sk, struct fnetnode *fn)
2808{
2809 struct dchub *hub;
2810 char *newbuf;
2811 size_t datalen;
2812 char *p;
2813
2814 hub = (struct dchub *)fn->data;
2815 if((newbuf = sockgetinbuf(sk, &datalen)) == NULL)
2816 return;
2817 if(hub->inbufdata > 500000) /* Discard possible malicious data */
2818 hub->inbufdata = 0;
2819 sizebuf2(hub->inbuf, hub->inbufdata + datalen, 1);
2820 memcpy(hub->inbuf + hub->inbufdata, newbuf, datalen);
2821 free(newbuf);
2822 p = hub->inbuf + hub->inbufdata;
2823 hub->inbufdata += datalen;
2824 while((datalen > 0) && ((p = memchr(p, '|', datalen)) != NULL))
2825 {
2826 *(p++) = 0;
2827 newqcmd(&hub->queue, hub->inbuf);
2828 memmove(hub->inbuf, p, hub->inbufdata -= p - hub->inbuf);
2829 datalen = hub->inbufdata;
2830 p = hub->inbuf;
2831 }
2832}
2833
2834static void huberr(struct socket *sk, int err, struct fnetnode *fn)
2835{
2836 killfnetnode(fn);
2837}
2838
2839static int hubsetnick(struct fnetnode *fn, wchar_t *newnick)
2840{
2841 struct dchub *hub;
2842 char *buf;
2843
2844 hub = fn->data;
2845 if((buf = icwcstombs(newnick, DCCHARSET)) == NULL)
2846 return(1);
2847 if((strchr(buf, ' ') != NULL) || (strchr(buf, '|') != NULL) || (strchr(buf, '$') != NULL))
2848 {
2849 free(buf);
2850 return(1);
2851 }
2852 if(hub == NULL) /* Not yet connected */
2853 {
2854 free(buf);
2855 return(0);
2856 }
2857 if(hub->nativenick != NULL)
2858 free(hub->nativenick);
2859 hub->nativenick = buf;
2860 return(0);
2861}
2862
2863static struct dchub *newdchub(struct fnetnode *fn)
2864{
2865 struct dchub *new;
2866
2867 new = smalloc(sizeof(*new));
2868 memset(new, 0, sizeof(*new));
2869 fn->data = new;
2870 if(hubsetnick(fn, fn->mynick))
2871 fnetsetnick(fn, L"DoldaConnectUser-IN");
2872 /* IN as in Invalid Nick */
2873 return(new);
2874}
2875
2876static struct dcpeer *newdcpeer(struct socket *sk)
2877{
2878 struct dcpeer *new;
2879
2880 new = smalloc(sizeof(*new));
2881 memset(new, 0, sizeof(*new));
2882 new->transfer = NULL;
2883 getsock(sk);
2884 new->sk = sk;
2885 new->next = peers;
2886 new->prev = NULL;
2887 if(peers != NULL)
2888 peers->prev = new;
2889 peers = new;
2890 numdcpeers++;
2891 return(new);
2892}
2893
2894static void freedcpeer(struct dcpeer *peer)
2895{
2896 int i;
2897 struct qcommand *qcmd;
2898
2899 peer->freeing = 1;
2900 if(peers == peer)
2901 peers = peer->next;
2902 if(peer->next != NULL)
2903 peer->next->prev = peer->prev;
2904 if(peer->prev != NULL)
2905 peer->prev->next = peer->next;
2906 if(peer->transfer != NULL)
2907 {
2908 if(peer->transfer->dir == TRNSD_UP)
2909 peer->transfer->close = 1;
2910 if(peer->transfer->dir == TRNSD_DOWN)
2911 resettransfer(peer->transfer);
2912 transferdetach(peer->transfer);
2913 }
2914 if(peer->sk->data == peer)
2915 peer->sk->data = NULL;
2916 peer->sk->readcb = NULL;
2917 peer->sk->writecb = NULL;
2918 peer->sk->errcb = NULL;
2919 putsock(peer->sk);
2920 endcompress(peer);
2921 if(peer->supports != NULL)
2922 {
2923 for(i = 0; peer->supports[i] != NULL; i++)
2924 free(peer->supports[i]);
2925 free(peer->supports);
2926 }
d3372da9 2927 if(peer->inbuf != NULL)
2928 free(peer->inbuf);
2929 if(peer->key != NULL)
2930 free(peer->key);
2931 if(peer->wcsname != NULL)
2932 free(peer->wcsname);
2933 if(peer->nativename != NULL)
2934 free(peer->nativename);
2935 if(peer->fn != NULL)
2936 putfnetnode(peer->fn);
2937 while((qcmd = ulqcmd(&peer->queue)) != NULL)
2938 freeqcmd(qcmd);
2939 free(peer);
2940 numdcpeers--;
2941}
2942
2943static void hubconnect(struct fnetnode *fn)
2944{
2945 fn->sk->readcb = (void (*)(struct socket *, void *))hubread;
2946 fn->sk->errcb = (void (*)(struct socket *, int, void *))huberr;
2947 getfnetnode(fn);
2948 fn->data = newdchub(fn);
2949 fn->sk->data = fn;
2950 return;
2951}
2952
2953static void hubdestroy(struct fnetnode *fn)
2954{
2955 struct dchub *hub;
2956 struct qcommand *qcmd;
2957
2958 hub = (struct dchub *)fn->data;
2959 if(fn->sk != NULL)
2960 {
2961 if(fn->sk->data == fn)
2962 {
2963 fn->sk->data = NULL;
2964 putfnetnode(fn);
2965 }
2966 }
2967 if(hub == NULL)
2968 return;
2969 while((qcmd = ulqcmd(&hub->queue)) != NULL)
2970 freeqcmd(qcmd);
2971 if(hub->nativename != NULL)
2972 free(hub->nativename);
2973 if(hub->nativenick != NULL)
2974 free(hub->nativenick);
2975 if(hub->inbuf != NULL)
2976 free(hub->inbuf);
2977 free(hub);
2978}
2979
2980static wchar_t *dcbasename(wchar_t *filename)
2981{
2982 wchar_t *ret;
2983
2984 if((ret = wcsrchr(filename, L'\\')) != NULL)
2985 return(ret + 1);
2986 return(filename);
2987}
2988
2989static struct transferiface dctransfer =
2990{
2991 .detach = (void (*)(struct transfer *, void *))dctransdetach,
2992 .gotdata = (void (*)(struct transfer *, void *))dctransgotdata,
2993 .endofdata = (void (*)(struct transfer *, void *))dctransendofdata,
2994 .wantdata = (void (*)(struct transfer *, void *))dcwantdata
2995};
2996
2997static struct fnet dcnet =
2998{
2999 .name = L"dc",
3000 .connect = hubconnect,
3001 .destroy = hubdestroy,
3002 .setnick = hubsetnick,
3003 .reqconn = hubreqconn,
3004 .sendchat = hubsendchat,
3005 .search = hubsearch,
3006 .filebasename = dcbasename
3007};
3008
3009static void peerread(struct socket *sk, struct dcpeer *peer)
3010{
3011 char *newbuf, *p;
3012 size_t datalen;
9a2d6cb8 3013 struct command *cmd;
d3372da9 3014
3015 if((newbuf = sockgetinbuf(sk, &datalen)) == NULL)
3016 return;
3017 sizebuf2(peer->inbuf, peer->inbufdata + datalen, 1);
3018 memcpy(peer->inbuf + peer->inbufdata, newbuf, datalen);
3019 free(newbuf);
d3372da9 3020 peer->inbufdata += datalen;
9a2d6cb8 3021 if(peer->state == PEER_CMD)
d3372da9 3022 {
d3372da9 3023 p = peer->inbuf;
9a2d6cb8 3024 while((peer->inbufdata > 0) && (p = memchr(peer->inbuf, '|', peer->inbufdata)) != NULL)
3025 {
3026 *(p++) = 0;
3027 newqcmd(&peer->queue, peer->inbuf);
3028 for(cmd = peercmds; cmd->handler != NULL; cmd++)
3029 {
5eee9d66 3030 if(!memcmp(peer->inbuf, cmd->name, strlen(cmd->name)) && ((peer->inbuf[strlen(cmd->name)] == ' ') || (peer->inbuf[strlen(cmd->name)] == '|')))
9a2d6cb8 3031 break;
3032 }
5eee9d66 3033 memmove(peer->inbuf, p, peer->inbufdata -= p - peer->inbuf);
9a2d6cb8 3034 if(cmd->stop)
3035 {
3036 peer->state = PEER_STOP;
3037 break;
3038 }
9a2d6cb8 3039 }
3040 } else if(peer->state == PEER_TTHL) {
3041 handletthl(peer);
d3372da9 3042 }
3043}
3044
3045static void peererror(struct socket *sk, int err, struct dcpeer *peer)
3046{
3047 freedcpeer(peer);
3048}
3049
3050static void peerconnect(struct socket *sk, int err, struct fnetnode *fn)
3051{
3052 struct dcpeer *peer;
3053
3054 if(err != 0)
3055 {
3056 putfnetnode(fn);
3057 return;
3058 }
3059 peer = newdcpeer(sk);
3060 peer->fn = fn;
3061 peer->accepted = 0;
3062 sk->readcb = (void (*)(struct socket *, void *))peerread;
3063 sk->errcb = (void (*)(struct socket *, int, void *))peererror;
3064 sk->data = peer;
3065 socksettos(sk, confgetint("fnet", "fnptos"));
d3372da9 3066 putsock(sk);
9a2d6cb8 3067 sendmynick(peer);
3068 sendpeerlock(peer);
d3372da9 3069}
3070
3071static void peeraccept(struct socket *sk, struct socket *newsk, void *data)
3072{
3073 struct dcpeer *peer;
3074
3075 peer = newdcpeer(newsk);
3076 peer->accepted = 1;
3077 newsk->readcb = (void (*)(struct socket *, void *))peerread;
3078 newsk->errcb = (void (*)(struct socket *, int, void *))peererror;
3079 newsk->data = peer;
3080 socksettos(newsk, confgetint("fnet", "fnptos"));
d3372da9 3081}
3082
3083static void updatehmlist(void)
3084{
3085 int i, lev, ic, ret;
3086 struct sharecache *node;
3087 char *buf, *buf2, numbuf[32];
3088 size_t bufsize, bufdata;
3089 int fd, ibuf;
3090
3091 bufdata = 0;
3092 buf = smalloc(bufsize = 65536);
3093 node = shareroot->child;
3094 lev = 0;
3095 while(1)
3096 {
3097 ic = 0;
3098 if((buf2 = icwcstombs(node->name, DCCHARSET)) != NULL)
3099 {
3100 for(i = 0; i < lev; i++)
3101 addtobuf(buf, 9);
3102 bufcat(buf, buf2, strlen(buf2));
3103 free(buf2);
3104 if(node->f.b.type == FILE_REG)
3105 {
3106 addtobuf(buf, '|');
3107 sprintf(numbuf, "%i", node->size);
3108 bufcat(buf, numbuf, strlen(numbuf));
3109 }
3110 addtobuf(buf, 13);
3111 addtobuf(buf, 10);
3112 } else {
3113 ic = 1;
3114 }
3115 if((node->child != NULL) && !ic)
3116 {
3117 lev++;
3118 node = node->child;
3119 } else if(node->next != NULL) {
3120 node = node->next;
3121 } else {
3122 while(node->next == NULL)
3123 {
3124 lev--;
3125 node = node->parent;
3126 if(node == shareroot)
3127 break;
3128 }
3129 if(node == shareroot)
3130 break;
3131 node = node->next;
3132 }
3133 }
3134 if(hmlistname != NULL)
3135 {
3136 unlink(hmlistname);
3137 free(hmlistname);
3138 }
3139 hmlistname = sstrdup("/tmp/dc-filelist-hm-XXXXXX");
3140 if((fd = mkstemp(hmlistname)) < 0)
3141 {
3142 flog(LOG_WARNING, "could not create HM file list tempfile: %s", strerror(errno));
3143 free(hmlistname);
3144 hmlistname = NULL;
3145 } else {
3146 /*
3147 * I do not want to implement a good Huffman encoder, and it's not
3148 * like Huffman encoding actually yields any impressive results
3149 * for DC file lists anyway, so I'll just output a bogus
3150 * tree. Implement a good encoder if you want to.
3151 */
3152 write(fd, "HE3\r\0", 5);
3153 write(fd, &bufdata, 4);
3154 ibuf = 256;
3155 write(fd, &ibuf, 2);
3156 ibuf = 8;
3157 for(i = 0; i < 256; i++)
3158 {
3159 write(fd, &i, 1);
3160 write(fd, &ibuf, 1);
3161 }
3162 for(i = 0; i < 256; i++)
3163 write(fd, &i, 1);
3164 for(buf2 = buf; bufdata > 0;)
3165 {
3166 if((ret = write(fd, buf2, bufdata)) < 0)
3167 {
3168 flog(LOG_WARNING, "could not write file list: %s", strerror(errno));
3169 break;
3170 }
3171 bufdata -= ret;
3172 buf2 += ret;
3173 }
3174 close(fd);
3175 }
3176 free(buf);
3177}
3178
3179static struct xmlent
3180{
3181 wchar_t c;
3182 wchar_t *ent;
3183} entities[] = {
3184 {L'&', L"&amp;"},
3185 {L'\"', L"&#34;"},
3186/* {L'\'', L"&quot;"}, Emulate DC++ escaping by omitting this. */
3187 {L'\0', NULL}
3188};
3189
3190static wchar_t *escapexml(wchar_t *src)
3191{
3192 static wchar_t *buf = NULL;;
3193 int ret, c;
3194 wchar_t nbuf[32];
3195 size_t bufsize, bufdata;
3196 struct xmlent *ent;
3197
3198 if(buf != NULL)
3199 free(buf);
3200 buf = NULL;
3201 bufsize = bufdata = 0;
3202 for(; *src != L'\0'; src++)
3203 {
3204 c = wctob(*src);
3205 if((c > 0) && (c < 32))
3206 {
3207 bufcat(buf, L"&#", 2);
3208 ret = swprintf(nbuf, (sizeof(nbuf) / sizeof(*nbuf)), L"%i", c);
3209 bufcat(buf, nbuf, ret);
3210 addtobuf(buf, L';');
3211 } else {
3212 for(ent = entities; ent->ent != NULL; ent++)
3213 {
3214 if(ent->c == *src)
3215 {
3216 bufcat(buf, ent->ent, wcslen(ent->ent));
3217 break;
3218 }
3219 }
3220 if(ent->ent == NULL)
3221 addtobuf(buf, *src);
3222 }
3223 }
3224 addtobuf(buf, L'\0');
3225 return(buf);
3226}
3227
3228static void updatexmllist(void)
3229{
3230 int i, fd, lev;
3231 FILE *fs;
3232 char cidbuf[14], *namebuf;
3233 char *hashbuf;
3234 struct sharecache *node;
3235
3236 if(xmllistname != NULL)
3237 {
3238 unlink(xmllistname);
3239 free(xmllistname);
3240 }
3241 xmllistname = sstrdup("/tmp/dc-filelist-dcxml-XXXXXX");
3242 if((fd = mkstemp(xmllistname)) < 0)
3243 {
3244 flog(LOG_WARNING, "could not create XML file list tempfile: %s", strerror(errno));
3245 free(xmllistname);
3246 xmllistname = NULL;
3247 return;
3248 }
3249 if((fs = fdopen(fd, "w")) == NULL)
3250 {
3251 flog(LOG_WARNING, "could not fdopen XML list fd %i: %s", fd, strerror(errno));
3252 unlink(xmllistname);
3253 free(xmllistname);
3254 xmllistname = NULL;
3255 close(fd);
3256 return;
3257 }
3258 fprintf(fs, "<?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"yes\"?>\r\n");
3259 for(i = 0; i < sizeof(cidbuf) - 1; i++)
3260 cidbuf[i] = (rand() % ('Z' - 'A' + 1)) + 'A';
3261 cidbuf[i] = 0;
3262 fprintf(fs, "<FileListing Version=\"1\" CID=\"%s\" Base=\"/\" Generator=\"%s\">\r\n", cidbuf, DCIDFULL);
3263
3264 node = shareroot->child;
3265 lev = 0;
3266 while(1)
3267 {
3268 if((namebuf = icswcstombs(escapexml(node->name), "UTF-8", NULL)) != NULL)
3269 {
3270 for(i = 0; i < lev; i++)
3271 fputc('\t', fs);
3272 if(node->child != NULL)
3273 {
3274 fprintf(fs, "<Directory Name=\"%s\">\r\n", namebuf);
3275 node = node->child;
3276 lev++;
3277 continue;
3278 } else {
3279 fprintf(fs, "<File Name=\"%s\" Size=\"%i\"", namebuf, node->size);
3280 if(node->f.b.hastth)
3281 {
3282 hashbuf = base32encode(node->hashtth, 24);
3283 fprintf(fs, " TTH=\"%.39s\"", hashbuf);
3284 free(hashbuf);
3285 }
3286 fprintf(fs, "/>\r\n");
3287 }
3288 while(node->next == NULL)
3289 {
3290 node = node->parent;
3291 if(node == shareroot)
3292 {
3293 break;
3294 } else {
3295 lev--;
3296 for(i = 0; i < lev; i++)
3297 fputc('\t', fs);
3298 fprintf(fs, "</Directory>\r\n");
3299 }
3300 }
3301 if(node == shareroot)
3302 break;
3303 node = node->next;
3304 }
3305 }
3306
3307#ifdef DCPP_MASQUERADE
3308 fprintf(fs, "</FileListing>");
3309#else
3310 fprintf(fs, "</FileListing>\r\n");
3311#endif
3312 fclose(fs);
3313}
3314
3315static void updatexmlbz2list(void)
3316{
3317 int err, fd;
3318 FILE *in;
3319 FILE *real;
3320 BZFILE *out;
3321 char buf[1024];
3322 size_t bufdata;
3323
3324 if(xmllistname == NULL)
3325 return;
3326 if((in = fopen(xmllistname, "r")) == NULL)
3327 {
3328 flog(LOG_WARNING, "could not open XML file list for bzipping: %s", strerror(errno));
3329 return;
3330 }
3331 if(xmlbz2listname != NULL)
3332 {
3333 unlink(xmlbz2listname);
3334 free(xmlbz2listname);
3335 }
3336 xmlbz2listname = sstrdup("/tmp/dc-filelist-dcxmlbz2-XXXXXX");
3337 if((fd = mkstemp(xmlbz2listname)) < 0)
3338 {
3339 flog(LOG_WARNING, "could not create bzipped XML file list tempfile: %s", strerror(errno));
3340 free(xmlbz2listname);
3341 xmlbz2listname = NULL;
3342 fclose(in);
3343 return;
3344 }
3345 if((real = fdopen(fd, "w")) == NULL)
3346 {
3347 flog(LOG_WARNING, "could not fdopen bzipped XML list fd %i: %s", fd, strerror(errno));
3348 close(fd);
3349 unlink(xmlbz2listname);
3350 free(xmlbz2listname);
3351 xmlbz2listname = NULL;
3352 fclose(in);
3353 return;
3354 }
3355 out = BZ2_bzWriteOpen(&err, real, 9, 0, 0);
3356 if(err != BZ_OK)
3357 {
3358 flog(LOG_WARNING, "could not open bzip2 stream from XML list");
3359 fclose(real);
3360 unlink(xmlbz2listname);
3361 free(xmlbz2listname);
3362 xmlbz2listname = NULL;
3363 fclose(in);
3364 return;
3365 }
3366 while(!feof(in))
3367 {
3368 bufdata = fread(buf, 1, sizeof(buf), in);
3369 BZ2_bzWrite(&err, out, buf, bufdata);
3370 }
3371 fclose(in);
3372 BZ2_bzWriteClose(&err, out, 0, NULL, NULL);
3373 fclose(real);
3374}
3375
3376static int shareupdate(unsigned long long uusharesize, void *data)
3377{
3378 updatehmlist();
3379 updatexmllist();
3380 updatexmlbz2list();
3381 return(0);
3382}
3383
3384static void dispatchcommand(struct qcommand *qcmd, struct command *cmdlist, struct socket *sk, void *data)
3385{
3386 char *p;
3387 struct command *cmd;
3388
3389 if((p = strchr(qcmd->string, ' ')) != NULL)
3390 *(p++) = 0;
3391 for(cmd = cmdlist; cmd->handler != NULL; cmd++)
3392 {
3393 if(!strcmp(cmd->name, qcmd->string))
3394 break;
3395 }
3396 if(cmd->handler != NULL)
3397 cmd->handler(sk, data, qcmd->string, p);
3398/*
3399 else
3400 flog(LOG_DEBUG, "Unimplemented DC command: %s \"%s\"", qcmd->string, p?p:"noargs");
3401*/
3402}
3403
3404static int run(void)
3405{
3406 struct fnetnode *fn, *nextfn;
3407 struct dchub *hub;
3408 struct dcpeer *peer, *nextpeer;
3409 struct qcommand *qcmd;
3410 int ret;
3411
3412 ret = 0;
3413 for(fn = fnetnodes; fn != NULL; fn = nextfn)
3414 {
3415 nextfn = fn->next;
3416 if(fn->fnet != &dcnet)
3417 continue;
3418 if(fn->data == NULL)
3419 continue;
3420 hub = (struct dchub *)fn->data;
3421 if((qcmd = ulqcmd(&hub->queue)) != NULL)
3422 {
3423 if(*qcmd->string == '$')
3424 {
3425 if((fn->sk != NULL) && (fn->sk->state == SOCK_EST))
3426 dispatchcommand(qcmd, hubcmds, fn->sk, fn);
3427 } else if(*qcmd->string != 0) {
3428 hubrecvchat(fn->sk, fn, NULL, qcmd->string);
3429 }
3430 freeqcmd(qcmd);
3431 ret = 1;
3432 break;
3433 }
3434 }
3435 for(peer = peers; peer != NULL; peer = nextpeer)
3436 {
3437 nextpeer = peer->next;
3438 if((qcmd = ulqcmd(&peer->queue)) != NULL)
3439 {
3440 if(*qcmd->string == '$')
3441 dispatchcommand(qcmd, peercmds, peer->sk, peer);
3442 freeqcmd(qcmd);
3443 ret = 1;
3444 break;
3445 }
3446 }
3447 return(ret);
3448}
3449
3450static void preinit(int hup)
3451{
3452 if(hup)
3453 return;
3454 regfnet(&dcnet);
3455}
3456
3457static int updateudpport(struct configvar *var, void *uudata)
3458{
3459 struct sockaddr_in addr;
3460 struct socket *newsock;
3461
3462 memset(&addr, 0, sizeof(addr));
3463 addr.sin_family = AF_INET;
3464 addr.sin_port = htons(var->val.num);
3465 if((newsock = netcsdgram((struct sockaddr *)&addr, sizeof(addr))) == NULL)
3466 {
3467 flog(LOG_WARNING, "could not create new DC UDP socket, reverting to old: %s", strerror(errno));
3468 return(0);
3469 }
3470 newsock->readcb = udpread;
3471 if(udpsock != NULL)
3472 putsock(udpsock);
3473 udpsock = newsock;
3474 return(0);
3475}
3476
3477static int updatetcpport(struct configvar *var, void *uudata)
3478{
3479 struct sockaddr_in addr;
3480 struct socket *newsock;
3481
3482 memset(&addr, 0, sizeof(addr));
3483 addr.sin_family = AF_INET;
3484 addr.sin_port = htons(var->val.num);
3485 if((newsock = netcslisten(SOCK_STREAM, (struct sockaddr *)&addr, sizeof(addr), peeraccept, NULL)) == NULL)
3486 flog(LOG_INFO, "could not listen to a remote address, going into passive mode");
3487 if(tcpsock != NULL)
3488 putsock(tcpsock);
3489 tcpsock = newsock;
3490 return(0);
3491}
3492
3493static int init(int hup)
3494{
3495 struct sockaddr_in addr;
3496
3497 if(!hup)
3498 {
3499 GCBREG(sharechangecb, shareupdate, NULL);
3500 if(udpsock != NULL)
3501 putsock(udpsock);
3502 if(tcpsock != NULL)
3503 putsock(tcpsock);
3504 addr.sin_family = AF_INET;
3505 memset(&addr.sin_addr, 0, sizeof(addr.sin_addr));
3506 addr.sin_port = htons(confgetint("dc", "udpport"));
3507 if((udpsock = netcsdgram((struct sockaddr *)&addr, sizeof(addr))) == NULL)
3508 {
3509 flog(LOG_CRIT, "could not create DC UDP socket: %s", strerror(errno));
3510 return(1);
3511 }
3512 udpsock->readcb = udpread;
3513 addr.sin_port = htons(confgetint("dc", "tcpport"));
3514 if((tcpsock = netcslisten(SOCK_STREAM, (struct sockaddr *)&addr, sizeof(addr), peeraccept, NULL)) == NULL)
3515 flog(LOG_INFO, "could not listen to a remote address, going into passive mode");
3516 CBREG(confgetvar("dc", "udpport"), conf_update, updateudpport, NULL, NULL);
3517 CBREG(confgetvar("dc", "tcpport"), conf_update, updatetcpport, NULL, NULL);
3518 CBREG(confgetvar("net", "mode"), conf_update, updatetcpport, NULL, NULL);
3519 }
3520 return(0);
3521}
3522
3523static void terminate(void)
3524{
3525 if(hmlistname != NULL)
3526 {
3527 unlink(hmlistname);
3528 free(hmlistname);
3529 }
3530 if(xmllistname != NULL)
3531 {
3532 unlink(xmllistname);
3533 free(xmllistname);
3534 }
3535 if(xmlbz2listname != NULL)
3536 {
3537 unlink(xmlbz2listname);
3538 free(xmlbz2listname);
3539 }
3540}
3541
3542static struct configvar myvars[] =
3543{
3544 {CONF_VAR_STRING, "desc", {.str = L""}},
3545 {CONF_VAR_STRING, "speedstring", {.str = L"LAN(T1)"}},
3546 {CONF_VAR_STRING, "email", {.str = L"spam@spam.org"}},
3547 {CONF_VAR_INT, "udpport", {.num = 0}},
3548 {CONF_VAR_INT, "tcpport", {.num = 0}},
3549 {CONF_VAR_END}
3550};
3551
3552static struct module me =
3553{
3554 .conf =
3555 {
3556 .vars = myvars
3557 },
3558 .preinit = preinit,
3559 .init = init,
3560 .run = run,
3561 .terminate = terminate,
3562 .name = "dc"
3563};
3564
3565MODULE(me)
Dolda Connect