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[doldaconnect.git] / daemon / fnet-dc.c
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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;
109 int extended;
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;
732 int numhubs;
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);
738 numhubs = 0;
739 for(cfn = fnetnodes; cfn != NULL; cfn = cfn->next)
740 {
741 if((cfn->state == FNN_EST) || (cfn->state == FNN_HS))
742 numhubs++;
743 }
744 qstrf(sk, "<%s V:%s,M:%c,H:%i/0/0,S:%i>",
745 DCIDTAG,
746 DCIDTAGV,
747 (tcpsock == NULL)?'P':'A',
748 numhubs,
749 confgetint("transfer", "slots")
750 );
751 qstrf(sk, "$ $");
752 buf = tr(icswcstombs(confgetstr("dc", "speedstring"), DCCHARSET, "Charset_conv_failure"), "$_|_");
753 qstrf(sk, "%s\x01$", buf);
754 buf = tr(icswcstombs(confgetstr("dc", "email"), DCCHARSET, "Charset_conv_failure"), "$_|_");
755 qstrf(sk, "%s$", buf);
756 qstrf(sk, "%llu$|", sharesize);
757}
758
759static void hubhandleaction(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
760{
761 struct dchub *hub;
762
763 hub = fn->data;
764 if(!strcmp(cmd, "$Lock"))
765 {
766 qstrf(sk, "$ValidateNick %s|", hub->nativenick);
767 } else if(!strcmp(cmd, "$Hello")) {
768 if(fn->state == FNN_HS)
769 {
770 qstrf(sk, "$Version 1,0091|");
771 qstrf(sk, "$GetNickList|");
772 sendmyinfo(sk, fn);
773 fnetsetstate(fn, FNN_EST);
774 } else {
775 qstrf(sk, "$GetINFO %s %s|", args, hub->nativenick);
776 }
777 }
778}
779
780static void cmd_lock(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
781{
782 struct dchub *hub;
783 char *key;
784 char *p;
785
786 hub = fn->data;
787 if(!strncmp(args, "EXTENDEDPROTOCOL", 16))
788 hub->extended = 1;
789 if((p = strchr(args, ' ')) != NULL)
790 *(p++) = 0;
791 if(hub->extended)
792 {
793#ifdef DCPP_MASQUERADE
794 qstrf(sk, "$Supports UserCommand NoGetINFO NoHello UserIP2 TTHSearch GetZBlock |");
795#else
796 qstrf(sk, "$Supports UserCommand NoGetINFO NoHello UserIP2 TTHSearch GetZBlock|");
797#endif
798 }
799 key = dcmakekey(args);
800 qstrf(sk, "$Key %s|", key);
801 free(key);
802 hubhandleaction(sk, fn, cmd, args);
803}
804
805static void cmd_hubname(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
806{
807 wchar_t *buf;
808 struct dchub *hub;
809
810 hub = fn->data;
811 if(hub->nativename == NULL)
812 free(hub->nativename);
813 hub->nativename = sstrdup(args);
814 buf = icmbstowcs(args, DCCHARSET);
815 fnetsetname(fn, (buf == NULL)?L"Hubname conv error":buf);
816 if(buf != NULL)
817 free(buf);
818 hubhandleaction(sk, fn, cmd, args);
819}
820
821static void cmd_hello(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
822{
823 wchar_t *nick;
824 struct dchub *hub;
825
826 hub = fn->data;
827 if((nick = icmbstowcs(args, DCCHARSET)) == NULL)
828 return;
829 if(strcmp(args, hub->nativenick) && (fnetfindpeer(fn, nick) == NULL))
830 fnetaddpeer(fn, nick, nick);
831 free(nick);
832 hubhandleaction(sk, fn, cmd, args);
833}
834
835static void cmd_quit(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
836{
837 wchar_t *nick;
838 struct fnetpeer *peer;
839 struct dchub *hub;
840
841 hub = fn->data;
842 if((nick = icmbstowcs(args, DCCHARSET)) == NULL)
843 return;
844 if((peer = fnetfindpeer(fn, nick)) != NULL)
845 fnetdelpeer(peer);
846 free(nick);
847 hubhandleaction(sk, fn, cmd, args);
848}
849
850static void cmd_nicklist(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
851{
852 struct dchub *hub;
853 char *p;
854 wchar_t *buf;
855 struct fnetpeer *peer, *npeer;
856
857 hub = fn->data;
858 for(peer = fn->peers; peer != NULL; peer = peer->next)
859 peer->flags.b.delete = 1;
860 while((p = strstr(args, "$$")) != NULL)
861 {
862 *p = 0;
863 if((buf = icmbstowcs(args, DCCHARSET)) != NULL)
864 {
865 if((peer = fnetfindpeer(fn, buf)) == NULL)
866 peer = fnetaddpeer(fn, buf, buf);
867 else
868 peer->flags.b.delete = 0;
869 free(buf);
870 qstrf(sk, "$GetINFO %s %s|", args, hub->nativenick);
871 }
872 args = p + 2;
873 }
874 for(peer = fn->peers; peer != NULL; peer = npeer)
875 {
876 npeer = peer->next;
877 if(peer->flags.b.delete)
878 fnetdelpeer(peer);
879 }
880 hubhandleaction(sk, fn, cmd, args);
881}
882
883static void cmd_oplist(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
884{
885 struct dchub *hub;
886 char *p;
887 wchar_t *buf;
888 struct fnetpeer *peer;
889
890 hub = fn->data;
891 for(peer = fn->peers; peer != NULL; peer = peer->next)
892 peer->flags.b.op = 0;
893 while((p = strstr(args, "$$")) != NULL)
894 {
895 *p = 0;
896 if((buf = icmbstowcs(args, DCCHARSET)) != NULL)
897 {
898 if((peer = fnetfindpeer(fn, buf)) != NULL)
899 peer->flags.b.op = 1;
900 free(buf);
901 }
902 args = p + 2;
903 }
904 hubhandleaction(sk, fn, cmd, args);
905}
906
907static void cmd_myinfo(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
908{
909 char *p, *p2;
910 wchar_t *buf, *wp, *wp2;
911 wchar_t abuf[10];
912 struct fnetpeer *peer;
913 struct dchub *hub;
914
915 hub = fn->data;
916 p = args;
917 if(strncmp(p, "$ALL ", 5))
918 return;
919 p += 5;
920 if((p2 = strchr(p, ' ')) == NULL)
921 return;
922 *p2 = 0;
923 if((buf = icmbstowcs(p, DCCHARSET)) == NULL)
924 return;
925 if((peer = fnetfindpeer(fn, buf)) == NULL)
926 peer = fnetaddpeer(fn, buf, buf);
927 free(buf);
928 p = p2 + 1;
929 if((p2 = strstr(p, "$ $")) == NULL)
930 return;
931 *p2 = 0;
932 if((buf = icmbstowcs(p, DCCHARSET)) == NULL)
933 return;
934 if((wcslen(buf) > 0) && (buf[wcslen(buf) - 1] == L'>') && ((wp = wcschr(buf, L'<')) != NULL))
935 {
936 buf[wcslen(buf) - 1] = L'\0';
937 *(wp++) = L'\0';
938 if((wp2 = wcschr(wp, L' ')) != NULL)
939 {
940 *(wp2++) = L'\0';
941 fnetpeersetstr(peer, L"dc-client", wp);
942 wp = wp2;
943 do
944 {
945 if((wp2 = wcschr(wp, L',')) != NULL)
946 *(wp2++) = L'\0';
947 if(wp[1] != L':')
948 continue;
949 swprintf(abuf, 10, L"dc-tag-%lc", wp[0]);
950 fnetpeersetstr(peer, abuf, wp + 2);
951 wp = wp2;
952 } while(wp2 != NULL);
953 }
954 }
955 fnetpeersetstr(peer, L"descr", buf);
956 free(buf);
957 p = p2 + 3;
958 if((p2 = strchr(p, '$')) == NULL)
959 return;
960 *(p2 - 1) = 0;
961 if((buf = icmbstowcs(p, DCCHARSET)) == NULL)
962 return;
963 fnetpeersetstr(peer, L"dc-speed", buf);
964 free(buf);
965 p = p2 + 1;
966 if((p2 = strchr(p, '$')) == NULL)
967 return;
968 *p2 = 0;
969 if((buf = icmbstowcs(p, DCCHARSET)) == NULL)
970 return;
971 fnetpeersetstr(peer, L"email", buf);
972 free(buf);
973 p = p2 + 1;
974 if(strlen(p) < 1)
975 return;
976 fnetpeersetlnum(peer, L"share", strtoll(p, NULL, 10));
977 hubhandleaction(sk, fn, cmd, args);
978}
979
980/* I do not implement the fully in that I do not disconnect from the
981 * old hub. I do this since I believe that if the hub owner really
982 * wants to get rid of us, then it is his responsibility to disconnect
983 * us. */
984static void cmd_forcemove(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
985{
986 struct dchub *hub;
987 struct fnetnode *newfn;
988 int freeargs;
989
990 hub = fn->data;
991 if(strchr(args, ':') == NULL)
992 {
993 args = strcpy(smalloc(strlen(args) + 5), args);
994 strcat(args, ":411");
995 freeargs = 1;
996 } else {
997 freeargs = 0;
998 }
efc05613 999 if((newfn = fnetinitconnect(L"dc", args, NULL)) != NULL)
d3372da9 1000 {
1001 linkfnetnode(newfn);
1002 putfnetnode(newfn);
1003 }
1004 hubhandleaction(sk, fn, cmd, args);
1005 if(freeargs)
1006 free(args);
1007}
1008
1009static char *getdcpath(struct sharecache *node, size_t *retlen)
1010{
1011 char *buf, *buf2;
1012 size_t len, len2;
1013
1014 if(node->parent == NULL)
1015 return(NULL);
1016 if(node->parent == shareroot)
1017 {
1018 if((buf = icwcstombs(node->name, DCCHARSET)) == NULL)
1019 return(NULL);
1020 if(retlen != NULL)
1021 *retlen = strlen(buf);
1022 return(buf);
1023 } else {
1024 if((buf2 = icwcstombs(node->name, DCCHARSET)) == NULL)
1025 return(NULL);
1026 if((buf = getdcpath(node->parent, &len)) == NULL)
1027 {
1028 free(buf2);
1029 return(NULL);
1030 }
1031 len2 = strlen(buf2);
1032 buf = srealloc(buf, len + 1 + len2 + 1);
1033 buf[len++] = '\\';
1034 strcpy(buf + len, buf2);
1035 buf[len + len2] = 0;
1036 free(buf2);
1037 if(retlen != NULL)
1038 *retlen = len + len2;
1039 return(buf);
1040 }
1041}
1042
1043/*
1044 * This is the main share searching function for Direct Connect
1045 * peers. Feel free to optimize it if you feel the need for it. I
1046 * haven't ever seen it take any noticable CPU time anyway, so I
1047 * haven't felt that need.
1048 *
1049 * It may feel dubious to just return the directory when all terms are
1050 * satisfied rather than all the files in it, but it really benefits
1051 * everyone: Less cycles used for us, less UDP squelching for active
1052 * searchers, and less bandwidth waste for hubs when serving passive
1053 * searchers.
1054 */
1055static void cmd_search(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
1056{
1057 int i, done;
1058 struct dchub *hub;
1059 char *p, *p2;
1060 char *prefix, *infix, *postfix, *buf, *buf2;
1061 struct socket *dsk;
1062 struct sockaddr_in addr;
1063 struct sharecache *node;
1064 int minsize, maxsize;
1065 int dotth, buflen;
1066 int termnum, satisfied, skipcheck;
1067 int level, tersat[32];
1068 wchar_t *terms[32];
1069 char hashtth[24];
1070
1071 hub = fn->data;
1072 if((p = strchr(args, ' ')) == NULL)
1073 return;
1074 *(p++) = 0;
1075
1076 memset(terms, 0, sizeof(terms));
1077 prefix = infix = postfix = NULL;
1078 dsk = NULL;
1079 dotth = 0;
1080
1081 if(!strncmp(args, "Hub:", 4))
1082 {
1083 if(!strcmp(cmd, "$MultiSearch"))
1084 goto out;
1085 if(!strcmp(args + 4, hub->nativenick))
1086 goto out;
1087 prefix = sprintf2("$SR %s ", hub->nativenick);
1088 infix = sprintf2(" %i/%i\005", slotsleft(), confgetint("transfer", "slots"));
1089 postfix = sprintf2(" (%s)\005%s|", formataddress(fn->sk->remote, fn->sk->remotelen), args + 4);
1090 dsk = sk;
1091 getsock(dsk);
1092 } else {
1093 if((p2 = strchr(args, ':')) == NULL)
1094 goto out;
1095 *(p2++) = 0;
1096 addr.sin_family = AF_INET;
1097 if(!inet_aton(args, &addr.sin_addr))
1098 goto out;
1099 addr.sin_port = htons(atoi(p2));
1100 prefix = sprintf2("$SR %s ", hub->nativenick);
1101 infix = sprintf2(" %i/%i\005", slotsleft(), confgetint("transfer", "slots"));
1102 postfix = sprintf2(" (%s)|", formataddress(fn->sk->remote, fn->sk->remotelen));
1103 netdgramconn(dsk = netdupsock(udpsock), (struct sockaddr *)&addr, sizeof(addr));
1104 }
1105
1106 minsize = maxsize = -1;
1107 if(*p == 0)
1108 goto out;
1109 if(*(p++) == 'T')
1110 minsize = 0;
1111 if(*(p++) != '?')
1112 goto out;
1113 if(*p == 0)
1114 goto out;
9d8cf743 1115 if((*(p++) == 'T') && (minsize == 0))
d3372da9 1116 {
1117 maxsize = 0;
1118 minsize = -1;
1119 }
1120 if(*(p++) != '?')
1121 goto out;
1122 if((p2 = strchr(p, '?')) == NULL)
1123 goto out;
1124 *(p2++) = 0;
1125 if(minsize == 0)
1126 minsize = atoi(p);
1127 if(maxsize == 0)
1128 maxsize = atoi(p);
1129 p = p2 + 1;
1130 if(*(p++) != '?')
1131 goto out;
1132 termnum = 0;
1133 p2 = p;
1134 done = 0;
1135 while(!done)
1136 {
1137 if((*p2 == 0) || (*p2 == '$'))
1138 {
1139 if(*p2 == 0)
1140 done = 1;
1141 else
1142 *p2 = 0;
1143 if(*p)
1144 {
1145 if(!dotth && !strncmp(p, "TTH:", 4))
1146 {
1147 dotth = 1;
1148 if((buf = base32decode(p + 4, &buflen)) == NULL)
1149 goto out;
1150 if(buflen != 24)
1151 goto out;
1152 memcpy(hashtth, buf, 24);
1153 free(buf);
1154 } else {
1155 if((terms[termnum] = icmbstowcs(p, DCCHARSET)) != NULL)
1156 termnum++;
1157 }
1158 }
1159 p = p2 + 1;
1160 if(termnum == 32)
1161 break;
1162 }
1163 p2++;
1164 }
1165
1166 node = shareroot->child;
1167 level = 0;
1168 for(i = 0; i < termnum; i++)
1169 tersat[i] = -1;
1170 satisfied = 0;
1171 while(1)
1172 {
1173 skipcheck = 0;
1174 if(node->f.b.type == FILE_REG)
1175 {
1176 if((minsize >= 0) && (node->size < minsize))
1177 skipcheck = 1;
1178 if((maxsize >= 0) && (node->size > maxsize))
1179 skipcheck = 1;
1180 }
1181 if(!skipcheck && dotth)
1182 {
1183 if((node->f.b.type != FILE_REG) || (node->f.b.hastth && memcmp(hashtth, node->hashtth, 24)))
1184 skipcheck = 1;
1185 }
1186 if(!skipcheck)
1187 {
1188 for(i = 0; i < termnum; i++)
1189 {
1190 if(tersat[i] >= 0)
1191 continue;
1192 if(wcsexists(node->name, terms[i]))
1193 {
1194 tersat[i] = level;
1195 satisfied++;
1196 } else if(node->child == NULL) {
1197 break;
1198 }
1199 }
1200 }
1201 if(!skipcheck && (satisfied == termnum))
1202 {
1203 if((buf = getdcpath(node, NULL)) != NULL)
1204 {
1205 if(node->f.b.hastth)
1206 {
1207 buf2 = base32encode(node->hashtth, 24);
1208 qstrf(dsk, "%s%s\005%i%sTTH:%.39s%s", prefix, buf, node->size, infix, buf2, postfix);
1209 free(buf2);
1210 } else {
1211 qstrf(dsk, "%s%s\005%i%s%s%s", prefix, buf, node->size, infix, hub->nativename, postfix);
1212 }
1213 free(buf);
1214 }
1215 }
1216 if((!skipcheck && (satisfied == termnum)) || (node->child == NULL))
1217 {
1218 while(node->next == NULL)
1219 {
1220 if((node = node->parent) == shareroot)
1221 break;
1222 level--;
1223 }
1224 if(node == shareroot)
1225 break;
1226 for(i = 0; i < termnum; i++)
1227 {
1228 if(tersat[i] >= level)
1229 {
1230 tersat[i] = -1;
1231 satisfied--;
1232 }
1233 }
1234 node = node->next;
1235 } else {
1236 node = node->child;
1237 level++;
1238 }
1239 }
1240
1241 hubhandleaction(sk, fn, cmd, args);
1242
1243 out:
1244 if(dsk != NULL)
1245 putsock(dsk);
1246 if(prefix != NULL)
1247 free(prefix);
1248 if(infix != NULL)
1249 free(infix);
1250 if(postfix != NULL)
1251 free(postfix);
1252 for(i = 0; (i < 32) && (terms[i] != NULL); i++)
1253 free(terms[i]);
1254}
1255
1256static void cmd_connecttome(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
1257{
1258 char *p;
1259 struct dchub *hub;
1260 struct socket *newsk;
1261 struct sockaddr_in addr;
1262
1263 hub = fn->data;
1264 if((p = strchr(args, ' ')) == NULL)
1265 return;
1266 *(p++) = 0;
1267 if(strcmp(args, hub->nativenick))
1268 return;
1269 addr.sin_family = AF_INET;
1270 args = p;
1271 if((p = strchr(args, ':')) == NULL)
1272 return;
1273 *(p++) = 0;
1274 addr.sin_port = htons(atoi(p));
1275 if(!inet_aton(args, &addr.sin_addr))
1276 return;
1277 newsk = netcsconn((struct sockaddr *)&addr, sizeof(addr), (void (*)(struct socket *, int, void *))peerconnect, fn);
1278 getfnetnode(fn);
1279 hubhandleaction(sk, fn, cmd, args);
1280}
1281
1282static void sendctm(struct socket *sk, char *nick)
1283{
1284 struct sockaddr *addr;
1285 socklen_t addrlen;
1286
1287 if(tcpsock == NULL)
1288 return;
1289 if(sockgetremotename(tcpsock, &addr, &addrlen) < 0)
1290 return;
1291 if(addr->sa_family == AF_INET)
1292 qstrf(sk, "$ConnectToMe %s %s|", nick, formataddress(addr, addrlen));
1293 else
1294 flog(LOG_WARNING, "Direct Connect TCP socket is suddenly not AF_INET, but %i", addr->sa_family);
1295 free(addr);
1296}
1297
1298static void cmd_revconnecttome(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
1299{
1300 struct dchub *hub;
1301 char *p;
1302
1303 hub = fn->data;
1304 if((p = strchr(args, ' ')) == NULL)
1305 return;
1306 *(p++) = 0;
1307 if(strcmp(p, hub->nativenick))
1308 return;
1309 sendctm(sk, args);
1310 expectpeer(args, fn);
1311 hubhandleaction(sk, fn, cmd, args);
1312}
1313
1314static void cmd_getnetinfo(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
1315{
1316 struct dchub *hub;
1317 struct fnetnode *node;
1318 int numhubs;
1319
1320 hub = fn->data;
1321 numhubs = 0;
1322 for(node = fnetnodes; node != NULL; node = node->next)
1323 {
1324 if(node->state == FNN_EST)
1325 numhubs++;
1326 }
1327 qstrf(sk, "$NetInfo %i$%i$%c$0|", confgetint("transfer", "slots"), numhubs, (tcpsock == NULL)?'P':'A');
1328 hubhandleaction(sk, fn, cmd, args);
1329}
1330
1331static void cmd_to(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
1332{
1333 struct dchub *hub;
1334 char *p, *p2;
1335
1336 hub = fn->data;
1337 p = args;
1338 if((p2 = strchr(p, ' ')) == NULL)
1339 return;
1340 *(p2++) = 0;
1341 p = p2;
1342 if((p2 = strchr(p, ' ')) == NULL)
1343 return;
1344 *(p2++) = 0;
1345 if(strcmp(p, "From:"))
1346 return;
1347 p = p2;
1348 if((p2 = strstr(p, " $")) == NULL)
1349 return;
1350 *p2 = 0;
1351 p2 += 2;
1352 hubrecvchat(fn->sk, fn, p, p2);
1353 hubhandleaction(sk, fn, cmd, args);
1354}
1355
1356static void cmd_sr(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
1357{
1358 struct dchub *hub;
d86b7a9f 1359 char *p, *p2, *buf;
d3372da9 1360 char *nick, *filename, *hubname;
1361 int size, slots;
d86b7a9f 1362 size_t buflen;
d3372da9 1363 struct srchres *sr;
1364 wchar_t *wnick, *wfile;
1365
1366 hub = fn->data;
1367 nick = p = args;
1368 if((p2 = strchr(p, ' ')) == NULL)
1369 return;
1370 *p2 = 0;
1371 p = p2 + 1;
1372 filename = p;
1373 if((p2 = strchr(p, 5)) == NULL)
1374 return;
1375 *p2 = 0;
1376 p = p2 + 1;
1377 if((p2 = strchr(p, ' ')) == NULL)
1378 return;
1379 *p2 = 0;
1380 size = atoi(p);
1381 p = p2 + 1;
1382 if((p2 = strchr(p, '/')) == NULL)
1383 return;
1384 *p2 = 0;
1385 slots = atoi(p);
1386 p = p2 + 1;
1387 if((p2 = strchr(p, 5)) == NULL)
1388 return;
1389 p = p2 + 1;
1390 hubname = p;
1391 if((p2 = strstr(p, " (")) == NULL)
1392 return;
1393 *p2 = 0;
1394 if((wnick = icmbstowcs(nick, DCCHARSET)) == NULL)
1395 return;
1396 if((wfile = icmbstowcs(filename, DCCHARSET)) == NULL)
1397 {
1398 free(wnick);
1399 return;
1400 }
1401 sr = newsrchres(&dcnet, wfile, wnick);
1402 if(sr->peernick != NULL)
1403 free(sr->peernick);
1404 sr->peernick = swcsdup(wnick);
1405 sr->size = size;
1406 sr->slots = slots;
1407 free(wfile);
1408 free(wnick);
d86b7a9f 1409 if(!strncmp(hubname, "TTH:", 4))
1410 {
1411 if((buf = base32decode(hubname + 4, &buflen)) != NULL)
1412 {
1413 if(buflen == 24)
1414 sr->hash = newhash(L"TTH", 24, buf);
1415 free(buf);
1416 }
1417 }
d3372da9 1418 getfnetnode(sr->fn = fn);
1419 submitsrchres(sr);
1420 freesrchres(sr);
1421 hubhandleaction(sk, fn, cmd, args);
1422}
1423
1424static void cmd_usercommand(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
1425{
1426 /* Do nothing for now. */
1427}
1428
48509089 1429static void cmd_getpass(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
1430{
1431 struct dchub *hub;
1432 struct wcspair *arg;
1433 char *mbspw;
1434
1435 hub = fn->data;
1436 for(arg = fn->args; arg != NULL; arg = arg->next)
1437 {
1438 if(!wcscmp(arg->key, L"password"))
1439 break;
1440 }
1441 if((arg == NULL) || ((mbspw = icwcstombs(arg->val, DCCHARSET)) == NULL))
1442 {
1443 killfnetnode(fn);
1444 return;
1445 }
1446 qstrf(sk, "$MyPass %s|", mbspw);
1447 free(mbspw);
1448 hubhandleaction(sk, fn, cmd, args);
1449}
1450
d3372da9 1451static void cmd_mynick(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1452{
9a2d6cb8 1453 struct dcexppeer *expect;
1454
d3372da9 1455 if(peer->nativename != NULL)
1456 free(peer->nativename);
1457 peer->nativename = sstrdup(args);
1458 if(peer->wcsname != NULL)
1459 free(peer->wcsname);
1460 if((peer->wcsname = icmbstowcs(peer->nativename, DCCHARSET)) == NULL)
1461 {
1462 freedcpeer(peer);
1463 return;
1464 }
9a2d6cb8 1465 if(peer->accepted)
1466 {
1467 for(expect = expected; expect != NULL; expect = expect->next)
1468 {
1469 if(!strcmp(expect->nick, args))
1470 break;
1471 }
1472 if(expect == NULL)
1473 {
1474 peer->fn = NULL;
1475 } else {
1476 peer->fn = expect->fn;
1477 getfnetnode(peer->fn);
1478 freeexppeer(expect);
1479 }
1480 }
d3372da9 1481}
1482
1483static void cmd_direction(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1484{
1485 char *p;
9a2d6cb8 1486 int mydir;
1487 struct transfer *transfer;
d3372da9 1488
1489 if((p = strchr(args, ' ')) == NULL)
1490 return;
1491 *p = 0;
1492 if(!strcmp(args, "Upload"))
9a2d6cb8 1493 mydir = TRNSD_DOWN;
d3372da9 1494 if(!strcmp(args, "Download"))
9a2d6cb8 1495 mydir = TRNSD_UP;
1496 if(peer->accepted)
1497 {
1498 if((peer->transfer == NULL) || (mydir != peer->direction))
1499 {
1500 freedcpeer(peer);
1501 return;
1502 }
1b14d3d8 1503 if(peer->direction == TRNSD_DOWN)
1504 requestfile(peer);
9a2d6cb8 1505 } else {
1506 if(peer->wcsname == NULL)
1507 {
1508 freedcpeer(peer);
1509 return;
1510 }
1511 peer->direction = mydir;
1512 if(peer->direction == TRNSD_UP)
1513 {
1514 transfer = newupload(peer->fn, &dcnet, peer->wcsname, &dctransfer, peer);
1515 } else {
1516 if((transfer = finddownload(peer->wcsname)) == NULL)
1517 {
1518 freedcpeer(peer);
1519 return;
1520 }
1521 transferattach(transfer, &dctransfer, peer);
1522 transfersetstate(transfer, TRNS_HS);
1523 }
1524 transfersetnick(transfer, peer->wcsname);
1525 peer->transfer = transfer;
1526 if(peer->extended)
1527 sendsupports(peer);
1528 qstrf(sk, "$Direction %s %i|", (peer->direction == TRNSD_UP)?"Upload":"Download", rand() % 10000);
1529 if(peer->key != NULL)
1530 qstrf(sk, "$Key %s|", peer->key);
1531 if(peer->direction == TRNSD_DOWN)
1532 requestfile(peer);
1533 }
d3372da9 1534}
1535
1536static void cmd_peerlock(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1537{
9a2d6cb8 1538 char *p, *key;
1539 struct transfer *transfer;
d3372da9 1540
1541 if((p = strchr(args, ' ')) == NULL)
1542 return;
1543 *p = 0;
1544 if(!strncmp(args, "EXTENDEDPROTOCOL", 16))
1545 peer->extended = 1;
9a2d6cb8 1546 key = dcmakekey(args);
1547 if(peer->accepted)
1548 {
1549 if(peer->wcsname == NULL)
1550 {
1551 freedcpeer(peer);
1552 return;
1553 }
1554 sendmynick(peer);
1555 sendpeerlock(peer);
1556 if(peer->extended)
1557 sendsupports(peer);
1558 if((transfer = finddownload(peer->wcsname)) == NULL)
1559 {
1560 peer->direction = TRNSD_UP;
1561 transfer = newupload(peer->fn, &dcnet, peer->wcsname, &dctransfer, peer);
1562 } else {
1563 peer->direction = TRNSD_DOWN;
1564 transferattach(transfer, &dctransfer, peer);
1565 transfersetstate(transfer, TRNS_HS);
1566 }
1567 transfersetnick(transfer, peer->wcsname);
1568 peer->transfer = transfer;
1569 qstrf(sk, "$Direction %s %i|", (peer->direction == TRNSD_UP)?"Upload":"Download", rand() % 10000);
1570 qstrf(sk, "$Key %s|", key);
1571 } else {
1572 if(peer->key != NULL)
1573 free(peer->key);
1574 peer->key = key;
1575 }
d3372da9 1576}
1577
1578static void cmd_key(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1579{
9a2d6cb8 1580 /* NOP */
1581}
1582
1583static void startdl(struct dcpeer *peer)
1584{
1585 peer->state = PEER_TRNS;
1586 transferstartdl(peer->transfer, peer->sk);
1587 peer->sk->readcb = (void (*)(struct socket *, void *))transread;
1588 peer->sk->errcb = (void (*)(struct socket *, int, void *))transerr;
1589}
1590
1591static void startul(struct dcpeer *peer)
1592{
1593 peer->state = PEER_TRNS;
1594 transferstartul(peer->transfer, peer->sk);
1595 peer->sk->writecb = (void (*)(struct socket *, void *))transwrite;
d3372da9 1596}
1597
1598static void cmd_filelength(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1599{
1600 int size;
1601
1602 if(peer->transfer == NULL)
1603 {
1604 freedcpeer(peer);
1605 return;
1606 }
1607 size = atoi(args);
9a2d6cb8 1608 if(peer->transfer->size != size)
d3372da9 1609 {
d3372da9 1610 transfersetsize(peer->transfer, size);
1611 freedcpeer(peer);
1612 return;
1613 }
9a2d6cb8 1614 startdl(peer);
1615 qstr(peer->sk, "$Send|");
d3372da9 1616}
1617
1618static void cmd_error(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1619{
1620 if((peer->transfer != NULL) && (peer->transfer->dir == TRNSD_DOWN))
1621 {
1622 transferseterror(peer->transfer, TRNSE_NOTFOUND);
1623 resettransfer(peer->transfer);
1624 return;
1625 }
1626 freedcpeer(peer);
1627}
1628
1629static void cmd_maxedout(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1630{
1631 if((peer->transfer != NULL) && (peer->transfer->dir == TRNSD_DOWN))
1632 {
1633 transferseterror(peer->transfer, TRNSE_NOSLOTS);
1634 resettransfer(peer->transfer);
1635 return;
1636 }
1637 freedcpeer(peer);
1638}
1639
1640static struct
1641{
1642 char *name;
1643 char **file;
1644 void (*func)(void);
1645} lists[] =
1646{
1647 {"MyList.DcLst", &hmlistname, updatehmlist},
1648 {"files.xml", &xmllistname, updatexmllist},
1649 {"files.xml.bz2", &xmlbz2listname, updatexmlbz2list},
1650 {NULL, NULL}
1651};
1652
1653static int openfilelist(char *name)
1654{
1655 int i, fd;
1656 int errnobak;
1657
1658 for(i = 0; lists[i].name != NULL; i++)
1659 {
1660 if(!strcmp(name, lists[i].name))
1661 break;
1662 }
1663 errno = 0;
1664 if(lists[i].name == NULL)
1665 return(-1);
1666 fd = -1;
1667 if((*lists[i].file == NULL) || ((fd = open(*lists[i].file, O_RDONLY)) < 0))
1668 lists[i].func();
1669 if((fd < 0) && ((*lists[i].file == NULL) || ((fd = open(*lists[i].file, O_RDONLY)) < 0)))
1670 {
1671 errnobak = errno;
1672 flog(LOG_ERR, "could not open filelist tempfile: %s", strerror(errno));
1673 errno = errnobak;
1674 return(-1);
1675 }
1676 return(fd);
1677}
1678
1679static struct sharecache *findbytth(char *tth32)
1680{
1681 char *buf;
1682 size_t buflen;
1683 struct sharecache *node;
1684
1685 if((buf = base32decode(tth32, &buflen)) == NULL)
1686 return(NULL);
1687 if(buflen != 24)
1688 {
1689 free(buf);
1690 return(NULL);
1691 }
1692 for(node = shareroot->child; node != NULL; node = nextscnode(node))
1693 {
1694 if(node->f.b.hastth && !memcmp(node->hashtth, buf, 24))
1695 break;
1696 }
1697 free(buf);
1698 return(node);
1699}
1700
1701static struct sharecache *resdcpath(char *path, char *charset, char sep)
1702{
1703 struct sharecache *node;
1704 char *p, *p2;
1705
1706 node = shareroot;
1707 p = path;
1708 while(p != NULL)
1709 {
1710 if((p2 = strchr(p, sep)) != NULL)
1711 *(p2++) = 0;
1712 if((node = findcache(node, icsmbstowcs(p, charset, L""))) == NULL)
1713 return(NULL);
1714 p = p2;
1715 }
1716 return(node);
1717}
1718
1719static void cmd_get(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1720{
1721 int offset;
1722 char *p, *buf;
1723 wchar_t *buf2;
1724 struct sharecache *node;
1725 struct socket *lesk;
1726 int fd;
1727 struct stat sb;
1728
1729 if(peer->transfer == NULL)
1730 {
1731 freedcpeer(peer);
1732 return;
1733 }
1734 if((p = strchr(args, '$')) == NULL)
1735 {
1736 freedcpeer(peer);
1737 return;
1738 }
1739 *(p++) = 0;
1740 if((offset = (atoi(p) - 1)) < 0)
1741 {
1742 freedcpeer(peer);
1743 return;
1744 }
1745 if(((fd = openfilelist(args)) < 0) && (errno != 0))
1746 {
1747 qstr(sk, "$Error Could not send file list|");
1748 freedcpeer(peer);
1749 return;
1750 } else if(fd >= 0) {
1751 if((buf2 = icsmbstowcs(args, DCCHARSET, NULL)) != NULL)
1752 transfersetpath(peer->transfer, buf2);
1753 }
1754 if(fd < 0)
1755 {
1756 if(slotsleft() < 1)
1757 {
1758 qstr(sk, "$MaxedOut|");
1759 freedcpeer(peer);
1760 return;
1761 }
1762 if((node = resdcpath(args, DCCHARSET, '\\')) == NULL)
1763 {
1764 qstrf(sk, "$Error File not in share|");
1765 freedcpeer(peer);
1766 return;
1767 }
1768 if((fd = opensharecache(node)) < 0)
1769 {
1770 qstrf(sk, "$Error %s|", strerror(errno));
1771 freedcpeer(peer);
1772 return;
1773 }
1774 buf = getfspath(node);
1775 if((buf2 = icsmbstowcs(buf, NULL, NULL)) == NULL)
1776 flog(LOG_WARNING, "could not convert native path into a wcs (%s): %s", buf, strerror(errno));
1777 else
1778 transfersetpath(peer->transfer, buf2);
1779 free(buf);
1780 }
1781 if(fstat(fd, &sb) < 0)
1782 {
1783 close(fd);
1784 flog(LOG_WARNING, "could not stat file %ls: %s", node->name, strerror(errno));
1785 qstrf(sk, "$Error|");
1786 freedcpeer(peer);
1787 return;
1788 }
1789 if((offset != 0) && (lseek(fd, offset, SEEK_SET) < 0))
1790 {
1791 close(fd);
1792 qstrf(sk, "$Error Offset out of range|");
1793 freedcpeer(peer);
1794 return;
1795 }
1796 lesk = wrapsock(fd);
1797 transferprepul(peer->transfer, sb.st_size, offset, -1, lesk);
1798 putsock(lesk);
1799 qstrf(sk, "$FileLength %i|", peer->transfer->size);
d3372da9 1800}
1801
1802static void cmd_send(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1803{
1804 if(peer->transfer == NULL)
1805 {
1806 freedcpeer(peer);
1807 return;
1808 }
1809 if(peer->transfer->localend == NULL)
1810 {
1811 freedcpeer(peer);
1812 return;
1813 }
1814 peer->ptclose = 1;
9a2d6cb8 1815 startul(peer);
d3372da9 1816}
1817
1818static void cmd_supports(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1819{
1820 int i;
1821 char *p, *p2;
1822 char **arr;
1823 size_t arrsize, arrdata;
1824
1825 if(peer->supports != NULL)
1826 {
1827 for(i = 0; peer->supports[i] != NULL; i++)
1828 free(peer->supports[i]);
1829 free(peer->supports);
1830 }
1831 arr = NULL;
1832 arrsize = arrdata = 0;
1833 p = args;
1834 do
1835 {
1836 if((p2 = strchr(p, ' ')) != NULL)
1837 *(p2++) = 0;
1838 if(*p == 0)
1839 continue;
1840 addtobuf(arr, sstrdup(p));
1841 } while((p = p2) != NULL);
1842 addtobuf(arr, NULL);
1843 peer->supports = arr;
d3372da9 1844}
1845
1846static void cmd_getblock(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1847{
1848 int fd;
1849 char *p, *p2;
1850 int start, numbytes;
1851 char *charset, *buf;
1852 wchar_t *buf2;
1853 struct sharecache *node;
1854 struct stat sb;
1855 struct socket *lesk;
1856
1857 if(peer->transfer == NULL)
1858 {
1859 freedcpeer(peer);
1860 return;
1861 }
1862 p = args;
1863 if((p2 = strchr(p, ' ')) == NULL)
1864 {
1865 freedcpeer(peer);
1866 return;
1867 }
1868 *(p2++) = 0;
1869 start = atoi(p);
1870 p = p2;
1871 if((p2 = strchr(p, ' ')) == NULL)
1872 {
1873 freedcpeer(peer);
1874 return;
1875 }
1876 *(p2++) = 0;
1877 numbytes = atoi(p);
1878 p = p2;
1879 if(!strcmp(cmd, "$UGetBlock") || !strcmp(cmd, "$UGetZBlock"))
1880 charset = "UTF-8";
1881 else
1882 charset = DCCHARSET;
1883 if(!strcmp(cmd, "$GetZBlock") || !strcmp(cmd, "$UGetZBlock"))
1884 initcompress(peer, CPRS_ZLIB);
1885 if(((fd = openfilelist(p)) < 0) && (errno != 0))
1886 {
1887 qstr(sk, "$Error Could not send file list|");
1888 return;
1889 } else if(fd >= 0) {
1890 if((buf2 = icsmbstowcs(args, charset, NULL)) != NULL)
1891 transfersetpath(peer->transfer, buf2);
1892 }
1893 if(fd < 0)
1894 {
1895 if(slotsleft() < 1)
1896 {
1897 qstr(sk, "$MaxedOut|");
1898 return;
1899 }
1900 if((node = resdcpath(p, charset, '\\')) == NULL)
1901 {
1902 qstr(sk, "$Error File not in cache|");
1903 return;
1904 }
1905 if((fd = opensharecache(node)) < 0)
1906 {
1907 qstrf(sk, "$Error %s|", strerror(errno));
1908 return;
1909 }
1910 buf = getfspath(node);
1911 if((buf2 = icsmbstowcs(buf, NULL, NULL)) == NULL)
1912 flog(LOG_WARNING, "could not convert native path into a wcs (%s): %s", buf, strerror(errno));
1913 else
1914 transfersetpath(peer->transfer, buf2);
1915 free(buf);
1916 }
1917 if(fstat(fd, &sb) < 0)
1918 {
1919 close(fd);
1920 flog(LOG_WARNING, "could not stat file %ls: %s", node->name, strerror(errno));
1921 qstr(sk, "$Error|");
1922 return;
1923 }
1924 if((start != 0) && ((start >= sb.st_size) || (lseek(fd, start, SEEK_SET) < 0)))
1925 {
1926 close(fd);
1927 qstr(sk, "$Error Offset out of range|");
1928 return;
1929 }
1930 if((numbytes < 0) || (start + numbytes > sb.st_size))
1931 numbytes = sb.st_size - start;
1932 lesk = wrapsock(fd);
1933 transferprepul(peer->transfer, sb.st_size, start, start + numbytes, lesk);
1934 putsock(lesk);
1935 qstrf(sk, "$Sending %i|", numbytes);
9a2d6cb8 1936 startul(peer);
d3372da9 1937}
1938
1939static void cmd_adcget(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1940{
1941 int i;
1942 char **argv, *buf;
1943 int start, numbytes;
1944 struct sharecache *node;
1945 struct stat sb;
1946 struct socket *lesk;
1947 wchar_t *wbuf;
1948 int fd;
1949
1950 if(peer->transfer == NULL)
1951 {
1952 freedcpeer(peer);
1953 return;
1954 }
1955 if((argv = parseadc(args)) == NULL)
1956 {
1957 freedcpeer(peer);
1958 return;
1959 }
1960 if(parrlen(argv) < 4)
1961 {
1962 freedcpeer(peer);
1963 goto out;
1964 }
1965 start = atoi(argv[2]);
1966 numbytes = atoi(argv[3]);
1967 node = NULL;
1968 fd = -1;
1969 if(((fd = openfilelist(argv[1])) < 0) && (errno != 0))
1970 {
1971 qstr(sk, "$Error Could not send file list|");
1972 goto out;
1973 } else if(fd >= 0) {
1974 if((wbuf = icsmbstowcs(argv[1], "UTF-8", NULL)) != NULL)
1975 transfersetpath(peer->transfer, wbuf);
1976 }
1977 if(fd < 0)
1978 {
1979 if(slotsleft() < 1)
1980 {
1981 qstr(sk, "$MaxedOut|");
1982 goto out;
1983 }
1984 if(!strncmp(argv[1], "TTH/", 4))
1985 {
1986 if((node = findbytth(argv[1] + 4)) == NULL)
1987 {
1988 qstr(sk, "$Error File not in cache|");
1989 goto out;
1990 }
1991 } else {
9a2d6cb8 1992 if((node = resdcpath((argv[1][0] == '/')?(argv[1] + 1):(argv[1]), "UTF-8", '/')) == NULL)
d3372da9 1993 {
1994 qstr(sk, "$Error File not in cache|");
1995 goto out;
1996 }
1997 }
1998 if((fd = opensharecache(node)) < 0)
1999 {
2000 qstrf(sk, "$Error %s|", strerror(errno));
2001 goto out;
2002 }
2003 buf = getfspath(node);
2004 if((wbuf = icsmbstowcs(buf, NULL, NULL)) == NULL)
2005 flog(LOG_WARNING, "could not convert native path into a wcs (%s): %s", buf, strerror(errno));
2006 else
2007 transfersetpath(peer->transfer, wbuf);
2008 free(buf);
2009 }
2010 if(!strcmp(argv[0], "file"))
2011 {
2012 for(i = 4; argv[i] != NULL; i++)
2013 {
2014 if(!strcmp(argv[i], "ZL1"))
2015 initcompress(peer, CPRS_ZLIB);
2016 }
2017 if(fstat(fd, &sb) < 0)
2018 {
2019 flog(LOG_WARNING, "could not stat file %ls: %s", node->name, strerror(errno));
2020 qstr(sk, "$Error|");
2021 goto out;
2022 }
2023 if((start != 0) && ((start >= sb.st_size) || (lseek(fd, start, SEEK_SET) < 0)))
2024 {
2025 qstr(sk, "$Error Offset out of range|");
2026 goto out;
2027 }
2028 if((numbytes < 0) || (start + numbytes > sb.st_size))
2029 numbytes = sb.st_size - start;
2030 lesk = wrapsock(fd);
2031 transferprepul(peer->transfer, sb.st_size, start, start + numbytes, lesk);
2032 putsock(lesk);
2033 fd = -1;
2034 qstr(sk, "$ADCSND");
2035 sendadc(sk, "file");
2036 sendadc(sk, argv[1]);
2037 sendadcf(sk, "%i", start);
2038 sendadcf(sk, "%i", numbytes);
2039 if(peer->compress == CPRS_ZLIB)
2040 sendadc(sk, "ZL1");
2041 qstr(sk, "|");
9a2d6cb8 2042 startul(peer);
d3372da9 2043 } else if(!strcmp(argv[0], "tthl")) {
2044 /*
2045 * XXX: Implement full TTHL support.
2046 *
2047 * In the meantime, this is better than nothing, since it at
2048 * least allows fetching of the TTH root if it isn't already
2049 * known.
2050 */
2051 if(node == NULL)
2052 {
2053 qstr(sk, "$Error no TTHL data for virtual files|");
2054 goto out;
2055 }
2056 qstr(sk, "$ADCSND");
2057 sendadc(sk, "tthl");
2058 sendadc(sk, argv[1]);
2059 sendadc(sk, "0");
2060 sendadc(sk, "24");
2061 qstr(sk, "|");
2062 sockqueue(sk, node->hashtth, 24);
2063 } else {
2064 qstr(sk, "$Error Namespace not implemented|");
2065 goto out;
2066 }
d3372da9 2067
2068 out:
2069 if(fd >= 0)
2070 close(fd);
2071 freeparr(argv);
2072}
2073
9a2d6cb8 2074static void handletthl(struct dcpeer *peer)
2075{
2076 char buf[24];
2077
2078 while(peer->inbufdata >= 24)
2079 {
2080 pushtigertree(&peer->tth, peer->inbuf);
2081 memmove(peer->inbuf, peer->inbuf + 24, peer->inbufdata -= 24);
e52006fe 2082 peer->curread += 24;
9a2d6cb8 2083 }
e52006fe 2084 if(peer->curread >= peer->totalsize)
9a2d6cb8 2085 {
2086 peer->state = PEER_CMD;
2087 synctigertree(&peer->tth);
2088 restigertree(&peer->tth, buf);
2089 transfersethash(peer->transfer, newhash(L"TTH", 24, buf));
2090 requestfile(peer);
2091 }
2092}
2093
2094static void cmd_adcsnd(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
2095{
2096 char **argv;
2097 int start, numbytes;
2098
2099 if(peer->transfer == NULL)
2100 {
2101 freedcpeer(peer);
2102 return;
2103 }
2104 if((argv = parseadc(args)) == NULL)
2105 {
2106 freedcpeer(peer);
2107 return;
2108 }
2109 if(parrlen(argv) < 4)
2110 {
2111 freedcpeer(peer);
2112 goto out;
2113 }
2114 start = atoi(argv[2]);
2115 numbytes = atoi(argv[3]);
2116 if(!strcmp(argv[0], "tthl"))
2117 {
2118 if((start != 0) || (numbytes % 24 != 0))
2119 {
2120 /* Weird. Bail out. */
2121 freedcpeer(peer);
2122 goto out;
2123 }
2124 peer->state = PEER_TTHL;
2125 peer->totalsize = numbytes;
2126 peer->curread = 0;
2127 inittigertree(&peer->tth);
2128 handletthl(peer);
2129 } else if(!strcmp(argv[0], "file")) {
2130 if(start != peer->transfer->curpos)
2131 {
2132 freedcpeer(peer);
2133 goto out;
2134 }
2135 if(start + numbytes != peer->transfer->size)
2136 {
2137 transfersetsize(peer->transfer, start + numbytes);
2138 freedcpeer(peer);
2139 goto out;
2140 }
2141 startdl(peer);
e52006fe 2142 if(peer->inbufdata > 0)
2143 {
2144 sockpushdata(sk, peer->inbuf, peer->inbufdata);
2145 peer->inbufdata = 0;
2146 transread(sk, peer);
2147 }
9a2d6cb8 2148 } else {
2149 /* We certainly didn't request this...*/
2150 freedcpeer(peer);
2151 goto out;
2152 }
2153
2154 out:
2155 freeparr(argv);
2156}
2157
2158static void cmd_sending(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
2159{
2160 int numbytes;
2161
2162 if(peer->transfer == NULL)
2163 {
2164 freedcpeer(peer);
2165 return;
2166 }
2167 numbytes = atoi(args);
2168 if(peer->transfer->size - peer->transfer->curpos != numbytes)
2169 {
2170 transfersetsize(peer->transfer, peer->transfer->curpos + numbytes);
2171 freedcpeer(peer);
2172 return;
2173 }
2174 startdl(peer);
0d8c93cb 2175 if(peer->inbufdata > 0)
2176 {
2177 sockpushdata(sk, peer->inbuf, peer->inbufdata);
2178 peer->inbufdata = 0;
2179 transread(sk, peer);
2180 }
9a2d6cb8 2181}
2182
d3372da9 2183/*
2184Hub skeleton:
2185static void cmd_(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
2186{
2187 struct dchub *hub;
2188
2189 hub = fn->data;
2190 hubhandleaction(sk, fn, cmd, args);
2191}
2192
2193Peer skeleton:
2194static void cmd_(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
2195{
d3372da9 2196}
2197
2198*/
2199
2200static int hubreqconn(struct fnetpeer *peer)
2201{
2202 struct dchub *hub;
2203 char *mbsnick;
2204
2205 if((peer->fn->state != FNN_EST) || (peer->fn->fnet != &dcnet))
2206 {
2207 errno = EINVAL;
2208 return(1);
2209 }
2210 if((hub = peer->fn->data) == NULL)
2211 {
2212 errno = EFAULT;
2213 return(1);
2214 }
2215 if((mbsnick = icwcstombs(peer->id, DCCHARSET)) == NULL)
2216 return(1); /* Shouldn't happen, of course, but who knows... */
2217 if(tcpsock != NULL)
2218 {
2219 sendctm(peer->fn->sk, mbsnick);
2220 expectpeer(mbsnick, peer->fn);
2221 } else {
2222 qstrf(peer->fn->sk, "$RevConnectToMe %s %s|", hub->nativenick, mbsnick);
2223 }
2224 free(mbsnick);
2225 return(0);
2226}
2227
2228static int hubsendchat(struct fnetnode *fn, int public, wchar_t *to, wchar_t *string)
2229{
2230 struct dchub *hub;
2231 char *mbsstring, *mbsto;
2232
2233 hub = fn->data;
2234 if((mbsto = icwcstombs(to, DCCHARSET)) == NULL)
2235 {
2236 errno = EILSEQ;
2237 return(1);
2238 }
2239 if((mbsstring = icwcstombs(string, DCCHARSET)) == NULL)
2240 {
2241 errno = EILSEQ;
2242 return(1);
2243 }
2244 if((strchr(mbsto, '|') != NULL) || (strchr(mbsto, ' ') != NULL))
2245 {
2246 free(mbsto);
2247 free(mbsstring);
2248 errno = ESRCH;
2249 return(1);
2250 }
2251 if(strchr(mbsstring, '|') != NULL)
2252 {
2253 free(mbsto);
2254 free(mbsstring);
2255 errno = EILSEQ;
2256 return(1);
2257 }
2258 if(public)
2259 {
2260 if(*to == L'\0')
2261 {
2262 qstrf(fn->sk, "<%s> %s|", hub->nativenick, mbsstring);
2263 } else {
2264 qstrf(fn->sk, "$To: %s From: %s $<%s> %s|", mbsto, hub->nativenick, hub->nativenick, mbsstring);
2265 }
2266 } else {
2267 qstrf(fn->sk, "$To: %s From: %s $<%s> %s|", mbsto, hub->nativenick, hub->nativenick, mbsstring);
2268 }
2269 free(mbsto);
2270 free(mbsstring);
2271 return(0);
2272}
2273
2274static void findsizelimit(struct sexpr *sexpr, int *min, int *max)
2275{
2276 int minl, maxl, minr, maxr, retmin, retmax;
2277
2278 switch(sexpr->op)
2279 {
2280 case SOP_AND:
2281 findsizelimit(sexpr->l, &minl, &maxl);
2282 findsizelimit(sexpr->r, &minr, &maxr);
2283 retmin = (minl > minr)?minl:minr;
2284 if((maxl != -1) && (maxr != -1))
2285 retmax = (maxl < maxr)?maxl:maxr;
2286 else if(maxl != -1)
2287 retmax = maxl;
2288 else if(maxr != -1)
2289 retmax = maxr;
2290 else
2291 retmax = -1;
2292 break;
2293 case SOP_OR:
2294 findsizelimit(sexpr->l, &minl, &maxl);
2295 findsizelimit(sexpr->r, &minr, &maxr);
2296 retmin = (minl < minr)?minl:minr;
2297 if((maxl == -1) || (maxr == -1))
2298 retmax = -1;
2299 else
2300 retmax = (maxl > maxr)?maxl:maxr;
2301 break;
2302 case SOP_NOT:
2303 findsizelimit(sexpr->l, &minl, &maxl);
2304 if((minl == 0) && (maxl == -1)) /* Interval is unspecified */
2305 {
2306 retmin = 0;
2307 retmax = -1;
2308 } else if((minl == 0) && (maxl != -1)) {
2309 retmin = maxl + 1;
2310 retmax = -1;
2311 } else if((minl != 0) && (maxl == -1)) {
2312 retmin = 0;
2313 retmax = minl - 1;
2314 } else { /* This would yield two seperate intervals, which DC cannot handle */
2315 retmin = 0;
2316 retmax = -1;
2317 }
2318 case SOP_SIZELT:
2319 retmin = 0;
2320 retmax = sexpr->d.n - 1;
2321 break;
2322 case SOP_SIZEEQ:
2323 retmin = sexpr->d.n;
2324 retmax = sexpr->d.n;
2325 break;
2326 case SOP_SIZEGT:
2327 retmin = sexpr->d.n + 1;
2328 retmax = -1;
2329 break;
2330 default:
2331 retmin = 0;
2332 retmax = -1;
2333 break;
2334 }
2335 if(min != NULL)
2336 *min = retmin;
2337 if(max != NULL)
2338 *max = retmax;
2339}
2340
9d8cf743 2341static struct hash *findsehash(struct sexpr *sexpr)
2342{
2343 struct hash *h1, *h2;
2344
2345 switch(sexpr->op)
2346 {
2347 case SOP_AND:
2348 if((h1 = findsehash(sexpr->l)) != NULL)
2349 return(h1);
2350 if((h1 = findsehash(sexpr->r)) != NULL)
2351 return(h1);
2352 break;
2353 case SOP_OR:
2354 h1 = findsehash(sexpr->l);
2355 h2 = findsehash(sexpr->r);
2356 if(hashcmp(h1, h2))
2357 return(h1);
2358 break;
2359 case SOP_HASHIS:
2360 if(!wcscmp(sexpr->d.hash->algo, L"TTH"))
2361 return(sexpr->d.hash);
2362 default:
2363 break;
2364 }
2365 return(NULL);
2366}
2367
d3372da9 2368static int hubsearch(struct fnetnode *fn, struct search *srch, struct srchfnnlist *ln)
2369{
2370 struct dchub *hub;
2371 struct wcslist *list, *cur;
2372 char *sstr, *buf, *p;
2373 size_t sstrsize, sstrdata;
2374 struct sockaddr *name;
2375 socklen_t namelen;
2376 int minsize, maxsize;
9d8cf743 2377 struct hash *hash;
d3372da9 2378
2379 hub = fn->data;
2380 if((fn->state != FNN_EST) || (fn->sk == NULL) || (fn->sk->state != SOCK_EST))
2381 return(1);
2382 list = findsexprstrs(srch->sexpr);
2383 findsizelimit(srch->sexpr, &minsize, &maxsize);
9d8cf743 2384 hash = findsehash(srch->sexpr);
d3372da9 2385 if((minsize != 0) && (maxsize != -1))
2386 {
2387 /* Choose either minsize or maxsize by trying to determine
2388 * which choice will be most restrictive. The result can be
2389 * approximative at best anyway, so don't try too hard... */
2390 if((50000000 - maxsize) > (minsize - 50000000))
2391 minsize = 0;
2392 else
2393 maxsize = -1;
2394 }
d3372da9 2395 sstr = NULL;
2396 sstrsize = sstrdata = 0;
9d8cf743 2397 if((hash != NULL) && (hash->len == 24))
d3372da9 2398 {
9d8cf743 2399 /* Prioritize hash searches above all else */
2400 bufcat(sstr, "F?T?0?9?TTH:", 12);
2401 buf = base32encode(hash->buf, hash->len);
2402
2403 bufcat(sstr, buf, 39);
2404 free(buf);
2405 } else {
2406 if(minsize != 0)
d3372da9 2407 {
9d8cf743 2408 sizebuf2(sstr, sstrdata + 32, 1);
2409 snprintf(sstr + sstrdata, sstrsize - sstrdata, "T?F?%i?1?", minsize);
2410 } else if(maxsize != -1) {
2411 sizebuf2(sstr, sstrdata + 32, 1);
2412 snprintf(sstr + sstrdata, sstrsize - sstrdata, "T?T?%i?1?", maxsize);
2413 } else {
2414 bufcat(sstr, "F?F?0?1?", 8);
2415 }
2416 if(list != NULL)
2417 {
2418 for(cur = list; cur != NULL; cur = cur->next)
d3372da9 2419 {
9d8cf743 2420 if((buf = icwcstombs(cur->str, DCCHARSET)) == NULL)
2421 {
2422 /* Can't find anything anyway if the search expression
2423 * requires characters outside DC's charset. There's
2424 * nothing technically wrong with the search itself,
2425 * however, so return success. This should be
2426 * considered as an optimization. */
2427 freesl(&list);
2428 if(sstr != NULL)
2429 free(sstr);
2430 return(0);
2431 }
2432 if(cur != list)
2433 addtobuf(sstr, '$');
2434 /*
2435 * It probably doesn't hurt if buf contains any extra
2436 * dollar signs - it will just result in extra search
2437 * terms, and the extraneous results will be filtered by
2438 * the search layer anyway. It hurts if it contains any
2439 * pipes, though, so let's sell them for money.
2440 */
2441 for(p = buf; *p; p++)
2442 {
2443 if(*p == '|')
2444 *p = '$';
2445 }
2446 bufcat(sstr, buf, strlen(buf));
2447 free(buf);
d3372da9 2448 }
9d8cf743 2449 } else {
2450 /* Will match all files... :-/ */
2451 addtobuf(sstr, '.');
d3372da9 2452 }
d3372da9 2453 }
2454 addtobuf(sstr, 0);
2455 if(tcpsock != NULL)
2456 {
2457 if(sockgetremotename(udpsock, &name, &namelen) < 0)
2458 {
2459 flog(LOG_WARNING, "cannot get address of UDP socket");
2460 } else {
9d8cf743 2461 qstrf(fn->sk, "$Search %s %s|", formataddress(name, namelen), sstr);
d3372da9 2462 free(name);
2463 }
2464 } else {
9d8cf743 2465 qstrf(fn->sk, "$Search Hub:%s %s|", hub->nativenick, sstr);
d3372da9 2466 }
2467 free(sstr);
2468 freesl(&list);
2469 fn->lastsrch = time(NULL);
2470 return(0);
2471}
2472
2473#undef skipcmd
2474#undef qstr
2475#undef qstrf
2476
2477#define cc(c) ((void (*)(struct socket *, void *, char *, char *))(c))
2478struct command hubcmds[] =
2479{
2480 {"$Lock", cc(cmd_lock)},
2481 {"$HubName", cc(cmd_hubname)},
2482 {"$Hello", cc(cmd_hello)},
2483 {"$Quit", cc(cmd_quit)},
2484 {"$NickList", cc(cmd_nicklist)},
2485 {"$OpList", cc(cmd_oplist)},
2486 {"$MyINFO", cc(cmd_myinfo)},
2487 {"$ForceMove", cc(cmd_forcemove)},
2488 {"$Search", cc(cmd_search)},
2489 {"$MultiSearch", cc(cmd_search)},
2490 {"$ConnectToMe", cc(cmd_connecttome)},
2491 {"$RevConnectToMe", cc(cmd_revconnecttome)},
2492 {"$GetNetInfo", cc(cmd_getnetinfo)},
2493 {"$To:", cc(cmd_to)},
2494 {"$SR", cc(cmd_sr)},
2495 {"$UserCommand", cc(cmd_usercommand)},
48509089 2496 {"$GetPass", cc(cmd_getpass)},
d3372da9 2497 {NULL, NULL}
2498};
2499
2500struct command peercmds[] =
2501{
2502 {"$MyNick", cc(cmd_mynick)},
2503 {"$Lock", cc(cmd_peerlock)},
2504 {"$Direction", cc(cmd_direction)},
2505 {"$Key", cc(cmd_key)},
2506 {"$FileLength", cc(cmd_filelength)},
2507 {"$Error", cc(cmd_error)},
2508 {"$MaxedOut", cc(cmd_maxedout)},
2509 {"$Get", cc(cmd_get)},
2510 {"$Send", cc(cmd_send)},
2511 {"$Supports", cc(cmd_supports)},
2512 {"$GetBlock", cc(cmd_getblock)},
2513 {"$UGetBlock", cc(cmd_getblock)},
2514 {"$GetZBlock", cc(cmd_getblock)},
2515 {"$UGetZBlock", cc(cmd_getblock)},
2516 {"$ADCGET", cc(cmd_adcget)},
9a2d6cb8 2517 {"$ADCSND", cc(cmd_adcsnd), 1},
2518 {"$Sending", cc(cmd_sending), 1},
d3372da9 2519 {NULL, NULL}
2520};
2521#undef cc
2522
2523static void dctransdetach(struct transfer *transfer, struct dcpeer *peer)
2524{
2525 CBUNREG(transfer, trans_filterout, peer);
2526 if(peer->freeing)
2527 return;
2528 peer->transfer = NULL;
2529 freedcpeer(peer);
2530}
2531
2532static void dctransgotdata(struct transfer *transfer, struct dcpeer *peer)
2533{
2534 int ret;
2535 void *buf;
2536 char outbuf[1024];
2537 z_stream *cstr;
2538 size_t bufsize;
2539
2540 if((peer->state == PEER_TRNS) || (peer->state == PEER_SYNC))
2541 {
2542 if(sockqueuesize(peer->sk) < 65536)
2543 {
2544 if((buf = transfergetdata(transfer, &bufsize)) != NULL)
2545 {
2546 if(peer->compress == CPRS_NONE)
2547 {
2548 sockqueue(peer->sk, buf, bufsize);
2549 } else if(peer->compress == CPRS_ZLIB) {
2550 cstr = peer->cprsdata;
2551 cstr->next_in = buf;
2552 cstr->avail_in = bufsize;
2553 while(cstr->avail_in > 0)
2554 {
2555 cstr->next_out = outbuf;
2556 cstr->avail_out = sizeof(outbuf);
2557 if((ret = deflate(cstr, 0)) != Z_OK)
2558 {
2559 flog(LOG_WARNING, "bug? deflate() did not return Z_OK (but rather %i)", ret);
2560 freedcpeer(peer);
2561 return;
2562 }
2563 sockqueue(peer->sk, outbuf, sizeof(outbuf) - cstr->avail_out);
2564 }
2565 }
2566 free(buf);
2567 }
2568 if(peer->state == PEER_SYNC)
2569 {
2570 if(peer->compress == CPRS_ZLIB)
2571 {
2572 cstr = peer->cprsdata;
2573 cstr->next_in = NULL;
2574 cstr->avail_in = 0;
2575 do
2576 {
2577 cstr->next_out = outbuf;
2578 cstr->avail_out = sizeof(outbuf);
2579 ret = deflate(cstr, Z_FINISH);
2580 if((ret != Z_OK) && (ret != Z_STREAM_END))
2581 {
2582 flog(LOG_WARNING, "bug? deflate(Z_FINISH) did not return Z_OK (but rather %i)", ret);
2583 freedcpeer(peer);
2584 return;
2585 }
2586 sockqueue(peer->sk, outbuf, sizeof(outbuf) - cstr->avail_out);
2587 } while(ret != Z_STREAM_END);
2588 }
2589 if(peer->ptclose)
2590 {
2591 freedcpeer(peer);
2592 } else {
2593 peer->state = PEER_CMD;
2594 endcompress(peer);
2595 transfersetstate(transfer, TRNS_HS);
2596 socksettos(peer->sk, confgetint("fnet", "fnptos"));
2597 peer->sk->writecb = NULL;
2598 }
2599 }
2600 }
2601 }
2602}
2603
2604static void dctransendofdata(struct transfer *transfer, struct dcpeer *peer)
2605{
2606 peer->state = PEER_SYNC;
2607 dctransgotdata(transfer, peer);
2608}
2609
2610static void dcwantdata(struct transfer *transfer, struct dcpeer *peer)
2611{
2612 if(transferdatasize(transfer) < 65536)
2613 peer->sk->ignread = 0;
2614}
2615
2616static void transread(struct socket *sk, struct dcpeer *peer)
2617{
2618 void *buf;
2619 size_t bufsize;
2620 struct transfer *transfer;
2621
2622 if((buf = sockgetinbuf(sk, &bufsize)) == NULL)
2623 return;
2624 if(peer->transfer == NULL)
2625 {
2626 free(buf);
2627 freedcpeer(peer);
2628 return;
2629 }
2630 transferputdata(peer->transfer, buf, bufsize);
2631 free(buf);
2632 if(peer->transfer->curpos >= peer->transfer->size)
2633 {
2634 transfer = peer->transfer;
2635 transferdetach(transfer);
2636 transferendofdata(transfer);
2637 return;
2638 }
2639 if(transferdatasize(peer->transfer) > 65535)
2640 sk->ignread = 1;
2641}
2642
2643static void transerr(struct socket *sk, int err, struct dcpeer *peer)
2644{
2645 struct transfer *transfer;
2646
2647 if((transfer = peer->transfer) == NULL)
2648 {
2649 freedcpeer(peer);
2650 return;
2651 }
2652 transferdetach(transfer);
2653 transferendofdata(transfer);
2654}
2655
2656static void transwrite(struct socket *sk, struct dcpeer *peer)
2657{
2658 if((peer->state != PEER_TRNS) && (peer->state != PEER_SYNC))
2659 return;
2660 if(peer->transfer == NULL)
2661 {
2662 freedcpeer(peer);
2663 return;
2664 }
2665 dctransgotdata(peer->transfer, peer);
2666}
2667
2668static void udpread(struct socket *sk, void *data)
2669{
d86b7a9f 2670 char *buf, *p, *p2, *hashbuf;
2671 size_t buflen, hashlen;
d3372da9 2672 char *nick, *filename, *hubname;
2673 int size, slots;
2674 struct fnetnode *fn, *myfn;
2675 struct dchub *hub;
2676 struct srchres *sr;
2677 wchar_t *wnick, *wfile;
d86b7a9f 2678 struct hash *hash;
d3372da9 2679
2680 if((buf = sockgetinbuf(sk, &buflen)) == NULL)
2681 return;
2682 buf = srealloc(buf, buflen + 1);
2683 buf[buflen] = 0;
2684 if(!strncmp(buf, "$SR ", 4))
2685 {
2686 p = buf + 4;
2687 nick = p;
2688 if((p2 = strchr(p, ' ')) == NULL)
2689 {
2690 free(buf);
2691 return;
2692 }
2693 *p2 = 0;
2694 p = p2 + 1;
2695 filename = p;
2696 if((p2 = strchr(p, 5)) == NULL)
2697 {
2698 free(buf);
2699 return;
2700 }
2701 *p2 = 0;
2702 p = p2 + 1;
2703 if((p2 = strchr(p, ' ')) == NULL)
2704 {
2705 free(buf);
2706 return;
2707 }
2708 *p2 = 0;
2709 size = atoi(p);
2710 p = p2 + 1;
2711 if((p2 = strchr(p, '/')) == NULL)
2712 {
2713 free(buf);
2714 return;
2715 }
2716 *p2 = 0;
2717 slots = atoi(p);
2718 p = p2 + 1;
2719 if((p2 = strchr(p, 5)) == NULL)
2720 {
2721 free(buf);
2722 return;
2723 }
2724 p = p2 + 1;
2725 hubname = p;
2726 if((p2 = strstr(p, " (")) == NULL)
2727 {
2728 free(buf);
2729 return;
2730 }
2731 *p2 = 0;
2732 if((wnick = icmbstowcs(nick, DCCHARSET)) == NULL)
2733 {
2734 free(buf);
2735 return;
2736 }
2737 if((wfile = icmbstowcs(filename, DCCHARSET)) == NULL)
2738 {
2739 free(wnick);
2740 free(buf);
2741 return;
2742 }
2743 myfn = NULL;
d86b7a9f 2744 hash = NULL;
2745 if(!strncmp(hubname, "TTH:", 4))
d3372da9 2746 {
d86b7a9f 2747 if((hashbuf = base32decode(hubname + 4, &hashlen)) != NULL)
2748 {
2749 if(hashlen == 24)
2750 hash = newhash(L"TTH", 24, hashbuf);
2751 free(hashbuf);
2752 }
2753 } else {
2754 for(fn = fnetnodes; fn != NULL; fn = fn->next)
d3372da9 2755 {
d86b7a9f 2756 if((fn->fnet == &dcnet) && ((hub = fn->data) != NULL))
d3372da9 2757 {
d86b7a9f 2758 if((hub->nativename != NULL) && !strcmp(hub->nativename, hubname))
d3372da9 2759 {
d86b7a9f 2760 if(myfn == NULL)
2761 {
2762 myfn = fn;
2763 } else {
2764 myfn = NULL;
2765 break;
2766 }
d3372da9 2767 }
2768 }
2769 }
2770 }
2771 sr = newsrchres(&dcnet, wfile, wnick);
2772 if(sr->peernick != NULL)
2773 free(sr->peernick);
2774 sr->peernick = swcsdup(wnick);
2775 sr->size = size;
2776 sr->slots = slots;
2777 free(wfile);
2778 free(wnick);
2779 if(myfn != NULL)
2780 getfnetnode(sr->fn = myfn);
d86b7a9f 2781 if(hash != NULL)
2782 sr->hash = hash;
d3372da9 2783 submitsrchres(sr);
2784 freesrchres(sr);
2785 }
2786 free(buf);
2787}
2788
2789static void hubread(struct socket *sk, struct fnetnode *fn)
2790{
2791 struct dchub *hub;
2792 char *newbuf;
2793 size_t datalen;
2794 char *p;
2795
2796 hub = (struct dchub *)fn->data;
2797 if((newbuf = sockgetinbuf(sk, &datalen)) == NULL)
2798 return;
2799 if(hub->inbufdata > 500000) /* Discard possible malicious data */
2800 hub->inbufdata = 0;
2801 sizebuf2(hub->inbuf, hub->inbufdata + datalen, 1);
2802 memcpy(hub->inbuf + hub->inbufdata, newbuf, datalen);
2803 free(newbuf);
2804 p = hub->inbuf + hub->inbufdata;
2805 hub->inbufdata += datalen;
2806 while((datalen > 0) && ((p = memchr(p, '|', datalen)) != NULL))
2807 {
2808 *(p++) = 0;
2809 newqcmd(&hub->queue, hub->inbuf);
2810 memmove(hub->inbuf, p, hub->inbufdata -= p - hub->inbuf);
2811 datalen = hub->inbufdata;
2812 p = hub->inbuf;
2813 }
2814}
2815
2816static void huberr(struct socket *sk, int err, struct fnetnode *fn)
2817{
2818 killfnetnode(fn);
2819}
2820
2821static int hubsetnick(struct fnetnode *fn, wchar_t *newnick)
2822{
2823 struct dchub *hub;
2824 char *buf;
2825
2826 hub = fn->data;
2827 if((buf = icwcstombs(newnick, DCCHARSET)) == NULL)
2828 return(1);
2829 if((strchr(buf, ' ') != NULL) || (strchr(buf, '|') != NULL) || (strchr(buf, '$') != NULL))
2830 {
2831 free(buf);
2832 return(1);
2833 }
2834 if(hub == NULL) /* Not yet connected */
2835 {
2836 free(buf);
2837 return(0);
2838 }
2839 if(hub->nativenick != NULL)
2840 free(hub->nativenick);
2841 hub->nativenick = buf;
2842 return(0);
2843}
2844
2845static struct dchub *newdchub(struct fnetnode *fn)
2846{
2847 struct dchub *new;
2848
2849 new = smalloc(sizeof(*new));
2850 memset(new, 0, sizeof(*new));
2851 fn->data = new;
2852 if(hubsetnick(fn, fn->mynick))
2853 fnetsetnick(fn, L"DoldaConnectUser-IN");
2854 /* IN as in Invalid Nick */
2855 return(new);
2856}
2857
2858static struct dcpeer *newdcpeer(struct socket *sk)
2859{
2860 struct dcpeer *new;
2861
2862 new = smalloc(sizeof(*new));
2863 memset(new, 0, sizeof(*new));
2864 new->transfer = NULL;
2865 getsock(sk);
2866 new->sk = sk;
2867 new->next = peers;
2868 new->prev = NULL;
2869 if(peers != NULL)
2870 peers->prev = new;
2871 peers = new;
2872 numdcpeers++;
2873 return(new);
2874}
2875
2876static void freedcpeer(struct dcpeer *peer)
2877{
2878 int i;
2879 struct qcommand *qcmd;
2880
2881 peer->freeing = 1;
2882 if(peers == peer)
2883 peers = peer->next;
2884 if(peer->next != NULL)
2885 peer->next->prev = peer->prev;
2886 if(peer->prev != NULL)
2887 peer->prev->next = peer->next;
2888 if(peer->transfer != NULL)
2889 {
2890 if(peer->transfer->dir == TRNSD_UP)
2891 peer->transfer->close = 1;
2892 if(peer->transfer->dir == TRNSD_DOWN)
2893 resettransfer(peer->transfer);
2894 transferdetach(peer->transfer);
2895 }
2896 if(peer->sk->data == peer)
2897 peer->sk->data = NULL;
2898 peer->sk->readcb = NULL;
2899 peer->sk->writecb = NULL;
2900 peer->sk->errcb = NULL;
2901 putsock(peer->sk);
2902 endcompress(peer);
2903 if(peer->supports != NULL)
2904 {
2905 for(i = 0; peer->supports[i] != NULL; i++)
2906 free(peer->supports[i]);
2907 free(peer->supports);
2908 }
d3372da9 2909 if(peer->inbuf != NULL)
2910 free(peer->inbuf);
2911 if(peer->key != NULL)
2912 free(peer->key);
2913 if(peer->wcsname != NULL)
2914 free(peer->wcsname);
2915 if(peer->nativename != NULL)
2916 free(peer->nativename);
2917 if(peer->fn != NULL)
2918 putfnetnode(peer->fn);
2919 while((qcmd = ulqcmd(&peer->queue)) != NULL)
2920 freeqcmd(qcmd);
2921 free(peer);
2922 numdcpeers--;
2923}
2924
2925static void hubconnect(struct fnetnode *fn)
2926{
2927 fn->sk->readcb = (void (*)(struct socket *, void *))hubread;
2928 fn->sk->errcb = (void (*)(struct socket *, int, void *))huberr;
2929 getfnetnode(fn);
2930 fn->data = newdchub(fn);
2931 fn->sk->data = fn;
2932 return;
2933}
2934
2935static void hubdestroy(struct fnetnode *fn)
2936{
2937 struct dchub *hub;
2938 struct qcommand *qcmd;
2939
2940 hub = (struct dchub *)fn->data;
2941 if(fn->sk != NULL)
2942 {
2943 if(fn->sk->data == fn)
2944 {
2945 fn->sk->data = NULL;
2946 putfnetnode(fn);
2947 }
2948 }
2949 if(hub == NULL)
2950 return;
2951 while((qcmd = ulqcmd(&hub->queue)) != NULL)
2952 freeqcmd(qcmd);
2953 if(hub->nativename != NULL)
2954 free(hub->nativename);
2955 if(hub->nativenick != NULL)
2956 free(hub->nativenick);
2957 if(hub->inbuf != NULL)
2958 free(hub->inbuf);
2959 free(hub);
2960}
2961
2962static wchar_t *dcbasename(wchar_t *filename)
2963{
2964 wchar_t *ret;
2965
2966 if((ret = wcsrchr(filename, L'\\')) != NULL)
2967 return(ret + 1);
2968 return(filename);
2969}
2970
2971static struct transferiface dctransfer =
2972{
2973 .detach = (void (*)(struct transfer *, void *))dctransdetach,
2974 .gotdata = (void (*)(struct transfer *, void *))dctransgotdata,
2975 .endofdata = (void (*)(struct transfer *, void *))dctransendofdata,
2976 .wantdata = (void (*)(struct transfer *, void *))dcwantdata
2977};
2978
2979static struct fnet dcnet =
2980{
2981 .name = L"dc",
2982 .connect = hubconnect,
2983 .destroy = hubdestroy,
2984 .setnick = hubsetnick,
2985 .reqconn = hubreqconn,
2986 .sendchat = hubsendchat,
2987 .search = hubsearch,
2988 .filebasename = dcbasename
2989};
2990
2991static void peerread(struct socket *sk, struct dcpeer *peer)
2992{
2993 char *newbuf, *p;
2994 size_t datalen;
9a2d6cb8 2995 struct command *cmd;
d3372da9 2996
2997 if((newbuf = sockgetinbuf(sk, &datalen)) == NULL)
2998 return;
2999 sizebuf2(peer->inbuf, peer->inbufdata + datalen, 1);
3000 memcpy(peer->inbuf + peer->inbufdata, newbuf, datalen);
3001 free(newbuf);
d3372da9 3002 peer->inbufdata += datalen;
9a2d6cb8 3003 if(peer->state == PEER_CMD)
d3372da9 3004 {
d3372da9 3005 p = peer->inbuf;
9a2d6cb8 3006 while((peer->inbufdata > 0) && (p = memchr(peer->inbuf, '|', peer->inbufdata)) != NULL)
3007 {
3008 *(p++) = 0;
3009 newqcmd(&peer->queue, peer->inbuf);
3010 for(cmd = peercmds; cmd->handler != NULL; cmd++)
3011 {
5eee9d66 3012 if(!memcmp(peer->inbuf, cmd->name, strlen(cmd->name)) && ((peer->inbuf[strlen(cmd->name)] == ' ') || (peer->inbuf[strlen(cmd->name)] == '|')))
9a2d6cb8 3013 break;
3014 }
5eee9d66 3015 memmove(peer->inbuf, p, peer->inbufdata -= p - peer->inbuf);
9a2d6cb8 3016 if(cmd->stop)
3017 {
3018 peer->state = PEER_STOP;
3019 break;
3020 }
9a2d6cb8 3021 }
3022 } else if(peer->state == PEER_TTHL) {
3023 handletthl(peer);
d3372da9 3024 }
3025}
3026
3027static void peererror(struct socket *sk, int err, struct dcpeer *peer)
3028{
3029 freedcpeer(peer);
3030}
3031
3032static void peerconnect(struct socket *sk, int err, struct fnetnode *fn)
3033{
3034 struct dcpeer *peer;
3035
3036 if(err != 0)
3037 {
3038 putfnetnode(fn);
3039 return;
3040 }
3041 peer = newdcpeer(sk);
3042 peer->fn = fn;
3043 peer->accepted = 0;
3044 sk->readcb = (void (*)(struct socket *, void *))peerread;
3045 sk->errcb = (void (*)(struct socket *, int, void *))peererror;
3046 sk->data = peer;
3047 socksettos(sk, confgetint("fnet", "fnptos"));
d3372da9 3048 putsock(sk);
9a2d6cb8 3049 sendmynick(peer);
3050 sendpeerlock(peer);
d3372da9 3051}
3052
3053static void peeraccept(struct socket *sk, struct socket *newsk, void *data)
3054{
3055 struct dcpeer *peer;
3056
3057 peer = newdcpeer(newsk);
3058 peer->accepted = 1;
3059 newsk->readcb = (void (*)(struct socket *, void *))peerread;
3060 newsk->errcb = (void (*)(struct socket *, int, void *))peererror;
3061 newsk->data = peer;
3062 socksettos(newsk, confgetint("fnet", "fnptos"));
d3372da9 3063}
3064
3065static void updatehmlist(void)
3066{
3067 int i, lev, ic, ret;
3068 struct sharecache *node;
3069 char *buf, *buf2, numbuf[32];
3070 size_t bufsize, bufdata;
3071 int fd, ibuf;
3072
3073 bufdata = 0;
3074 buf = smalloc(bufsize = 65536);
3075 node = shareroot->child;
3076 lev = 0;
3077 while(1)
3078 {
3079 ic = 0;
3080 if((buf2 = icwcstombs(node->name, DCCHARSET)) != NULL)
3081 {
3082 for(i = 0; i < lev; i++)
3083 addtobuf(buf, 9);
3084 bufcat(buf, buf2, strlen(buf2));
3085 free(buf2);
3086 if(node->f.b.type == FILE_REG)
3087 {
3088 addtobuf(buf, '|');
3089 sprintf(numbuf, "%i", node->size);
3090 bufcat(buf, numbuf, strlen(numbuf));
3091 }
3092 addtobuf(buf, 13);
3093 addtobuf(buf, 10);
3094 } else {
3095 ic = 1;
3096 }
3097 if((node->child != NULL) && !ic)
3098 {
3099 lev++;
3100 node = node->child;
3101 } else if(node->next != NULL) {
3102 node = node->next;
3103 } else {
3104 while(node->next == NULL)
3105 {
3106 lev--;
3107 node = node->parent;
3108 if(node == shareroot)
3109 break;
3110 }
3111 if(node == shareroot)
3112 break;
3113 node = node->next;
3114 }
3115 }
3116 if(hmlistname != NULL)
3117 {
3118 unlink(hmlistname);
3119 free(hmlistname);
3120 }
3121 hmlistname = sstrdup("/tmp/dc-filelist-hm-XXXXXX");
3122 if((fd = mkstemp(hmlistname)) < 0)
3123 {
3124 flog(LOG_WARNING, "could not create HM file list tempfile: %s", strerror(errno));
3125 free(hmlistname);
3126 hmlistname = NULL;
3127 } else {
3128 /*
3129 * I do not want to implement a good Huffman encoder, and it's not
3130 * like Huffman encoding actually yields any impressive results
3131 * for DC file lists anyway, so I'll just output a bogus
3132 * tree. Implement a good encoder if you want to.
3133 */
3134 write(fd, "HE3\r\0", 5);
3135 write(fd, &bufdata, 4);
3136 ibuf = 256;
3137 write(fd, &ibuf, 2);
3138 ibuf = 8;
3139 for(i = 0; i < 256; i++)
3140 {
3141 write(fd, &i, 1);
3142 write(fd, &ibuf, 1);
3143 }
3144 for(i = 0; i < 256; i++)
3145 write(fd, &i, 1);
3146 for(buf2 = buf; bufdata > 0;)
3147 {
3148 if((ret = write(fd, buf2, bufdata)) < 0)
3149 {
3150 flog(LOG_WARNING, "could not write file list: %s", strerror(errno));
3151 break;
3152 }
3153 bufdata -= ret;
3154 buf2 += ret;
3155 }
3156 close(fd);
3157 }
3158 free(buf);
3159}
3160
3161static struct xmlent
3162{
3163 wchar_t c;
3164 wchar_t *ent;
3165} entities[] = {
3166 {L'&', L"&amp;"},
3167 {L'\"', L"&#34;"},
3168/* {L'\'', L"&quot;"}, Emulate DC++ escaping by omitting this. */
3169 {L'\0', NULL}
3170};
3171
3172static wchar_t *escapexml(wchar_t *src)
3173{
3174 static wchar_t *buf = NULL;;
3175 int ret, c;
3176 wchar_t nbuf[32];
3177 size_t bufsize, bufdata;
3178 struct xmlent *ent;
3179
3180 if(buf != NULL)
3181 free(buf);
3182 buf = NULL;
3183 bufsize = bufdata = 0;
3184 for(; *src != L'\0'; src++)
3185 {
3186 c = wctob(*src);
3187 if((c > 0) && (c < 32))
3188 {
3189 bufcat(buf, L"&#", 2);
3190 ret = swprintf(nbuf, (sizeof(nbuf) / sizeof(*nbuf)), L"%i", c);
3191 bufcat(buf, nbuf, ret);
3192 addtobuf(buf, L';');
3193 } else {
3194 for(ent = entities; ent->ent != NULL; ent++)
3195 {
3196 if(ent->c == *src)
3197 {
3198 bufcat(buf, ent->ent, wcslen(ent->ent));
3199 break;
3200 }
3201 }
3202 if(ent->ent == NULL)
3203 addtobuf(buf, *src);
3204 }
3205 }
3206 addtobuf(buf, L'\0');
3207 return(buf);
3208}
3209
3210static void updatexmllist(void)
3211{
3212 int i, fd, lev;
3213 FILE *fs;
3214 char cidbuf[14], *namebuf;
3215 char *hashbuf;
3216 struct sharecache *node;
3217
3218 if(xmllistname != NULL)
3219 {
3220 unlink(xmllistname);
3221 free(xmllistname);
3222 }
3223 xmllistname = sstrdup("/tmp/dc-filelist-dcxml-XXXXXX");
3224 if((fd = mkstemp(xmllistname)) < 0)
3225 {
3226 flog(LOG_WARNING, "could not create XML file list tempfile: %s", strerror(errno));
3227 free(xmllistname);
3228 xmllistname = NULL;
3229 return;
3230 }
3231 if((fs = fdopen(fd, "w")) == NULL)
3232 {
3233 flog(LOG_WARNING, "could not fdopen XML list fd %i: %s", fd, strerror(errno));
3234 unlink(xmllistname);
3235 free(xmllistname);
3236 xmllistname = NULL;
3237 close(fd);
3238 return;
3239 }
3240 fprintf(fs, "<?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"yes\"?>\r\n");
3241 for(i = 0; i < sizeof(cidbuf) - 1; i++)
3242 cidbuf[i] = (rand() % ('Z' - 'A' + 1)) + 'A';
3243 cidbuf[i] = 0;
3244 fprintf(fs, "<FileListing Version=\"1\" CID=\"%s\" Base=\"/\" Generator=\"%s\">\r\n", cidbuf, DCIDFULL);
3245
3246 node = shareroot->child;
3247 lev = 0;
3248 while(1)
3249 {
3250 if((namebuf = icswcstombs(escapexml(node->name), "UTF-8", NULL)) != NULL)
3251 {
3252 for(i = 0; i < lev; i++)
3253 fputc('\t', fs);
3254 if(node->child != NULL)
3255 {
3256 fprintf(fs, "<Directory Name=\"%s\">\r\n", namebuf);
3257 node = node->child;
3258 lev++;
3259 continue;
3260 } else {
3261 fprintf(fs, "<File Name=\"%s\" Size=\"%i\"", namebuf, node->size);
3262 if(node->f.b.hastth)
3263 {
3264 hashbuf = base32encode(node->hashtth, 24);
3265 fprintf(fs, " TTH=\"%.39s\"", hashbuf);
3266 free(hashbuf);
3267 }
3268 fprintf(fs, "/>\r\n");
3269 }
3270 while(node->next == NULL)
3271 {
3272 node = node->parent;
3273 if(node == shareroot)
3274 {
3275 break;
3276 } else {
3277 lev--;
3278 for(i = 0; i < lev; i++)
3279 fputc('\t', fs);
3280 fprintf(fs, "</Directory>\r\n");
3281 }
3282 }
3283 if(node == shareroot)
3284 break;
3285 node = node->next;
3286 }
3287 }
3288
3289#ifdef DCPP_MASQUERADE
3290 fprintf(fs, "</FileListing>");
3291#else
3292 fprintf(fs, "</FileListing>\r\n");
3293#endif
3294 fclose(fs);
3295}
3296
3297static void updatexmlbz2list(void)
3298{
3299 int err, fd;
3300 FILE *in;
3301 FILE *real;
3302 BZFILE *out;
3303 char buf[1024];
3304 size_t bufdata;
3305
3306 if(xmllistname == NULL)
3307 return;
3308 if((in = fopen(xmllistname, "r")) == NULL)
3309 {
3310 flog(LOG_WARNING, "could not open XML file list for bzipping: %s", strerror(errno));
3311 return;
3312 }
3313 if(xmlbz2listname != NULL)
3314 {
3315 unlink(xmlbz2listname);
3316 free(xmlbz2listname);
3317 }
3318 xmlbz2listname = sstrdup("/tmp/dc-filelist-dcxmlbz2-XXXXXX");
3319 if((fd = mkstemp(xmlbz2listname)) < 0)
3320 {
3321 flog(LOG_WARNING, "could not create bzipped XML file list tempfile: %s", strerror(errno));
3322 free(xmlbz2listname);
3323 xmlbz2listname = NULL;
3324 fclose(in);
3325 return;
3326 }
3327 if((real = fdopen(fd, "w")) == NULL)
3328 {
3329 flog(LOG_WARNING, "could not fdopen bzipped XML list fd %i: %s", fd, strerror(errno));
3330 close(fd);
3331 unlink(xmlbz2listname);
3332 free(xmlbz2listname);
3333 xmlbz2listname = NULL;
3334 fclose(in);
3335 return;
3336 }
3337 out = BZ2_bzWriteOpen(&err, real, 9, 0, 0);
3338 if(err != BZ_OK)
3339 {
3340 flog(LOG_WARNING, "could not open bzip2 stream from XML list");
3341 fclose(real);
3342 unlink(xmlbz2listname);
3343 free(xmlbz2listname);
3344 xmlbz2listname = NULL;
3345 fclose(in);
3346 return;
3347 }
3348 while(!feof(in))
3349 {
3350 bufdata = fread(buf, 1, sizeof(buf), in);
3351 BZ2_bzWrite(&err, out, buf, bufdata);
3352 }
3353 fclose(in);
3354 BZ2_bzWriteClose(&err, out, 0, NULL, NULL);
3355 fclose(real);
3356}
3357
3358static int shareupdate(unsigned long long uusharesize, void *data)
3359{
3360 updatehmlist();
3361 updatexmllist();
3362 updatexmlbz2list();
3363 return(0);
3364}
3365
3366static void dispatchcommand(struct qcommand *qcmd, struct command *cmdlist, struct socket *sk, void *data)
3367{
3368 char *p;
3369 struct command *cmd;
3370
3371 if((p = strchr(qcmd->string, ' ')) != NULL)
3372 *(p++) = 0;
3373 for(cmd = cmdlist; cmd->handler != NULL; cmd++)
3374 {
3375 if(!strcmp(cmd->name, qcmd->string))
3376 break;
3377 }
3378 if(cmd->handler != NULL)
3379 cmd->handler(sk, data, qcmd->string, p);
3380/*
3381 else
3382 flog(LOG_DEBUG, "Unimplemented DC command: %s \"%s\"", qcmd->string, p?p:"noargs");
3383*/
3384}
3385
3386static int run(void)
3387{
3388 struct fnetnode *fn, *nextfn;
3389 struct dchub *hub;
3390 struct dcpeer *peer, *nextpeer;
3391 struct qcommand *qcmd;
3392 int ret;
3393
3394 ret = 0;
3395 for(fn = fnetnodes; fn != NULL; fn = nextfn)
3396 {
3397 nextfn = fn->next;
3398 if(fn->fnet != &dcnet)
3399 continue;
3400 if(fn->data == NULL)
3401 continue;
3402 hub = (struct dchub *)fn->data;
3403 if((qcmd = ulqcmd(&hub->queue)) != NULL)
3404 {
3405 if(*qcmd->string == '$')
3406 {
3407 if((fn->sk != NULL) && (fn->sk->state == SOCK_EST))
3408 dispatchcommand(qcmd, hubcmds, fn->sk, fn);
3409 } else if(*qcmd->string != 0) {
3410 hubrecvchat(fn->sk, fn, NULL, qcmd->string);
3411 }
3412 freeqcmd(qcmd);
3413 ret = 1;
3414 break;
3415 }
3416 }
3417 for(peer = peers; peer != NULL; peer = nextpeer)
3418 {
3419 nextpeer = peer->next;
3420 if((qcmd = ulqcmd(&peer->queue)) != NULL)
3421 {
3422 if(*qcmd->string == '$')
3423 dispatchcommand(qcmd, peercmds, peer->sk, peer);
3424 freeqcmd(qcmd);
3425 ret = 1;
3426 break;
3427 }
3428 }
3429 return(ret);
3430}
3431
3432static void preinit(int hup)
3433{
3434 if(hup)
3435 return;
3436 regfnet(&dcnet);
3437}
3438
3439static int updateudpport(struct configvar *var, void *uudata)
3440{
3441 struct sockaddr_in addr;
3442 struct socket *newsock;
3443
3444 memset(&addr, 0, sizeof(addr));
3445 addr.sin_family = AF_INET;
3446 addr.sin_port = htons(var->val.num);
3447 if((newsock = netcsdgram((struct sockaddr *)&addr, sizeof(addr))) == NULL)
3448 {
3449 flog(LOG_WARNING, "could not create new DC UDP socket, reverting to old: %s", strerror(errno));
3450 return(0);
3451 }
3452 newsock->readcb = udpread;
3453 if(udpsock != NULL)
3454 putsock(udpsock);
3455 udpsock = newsock;
3456 return(0);
3457}
3458
3459static int updatetcpport(struct configvar *var, void *uudata)
3460{
3461 struct sockaddr_in addr;
3462 struct socket *newsock;
3463
3464 memset(&addr, 0, sizeof(addr));
3465 addr.sin_family = AF_INET;
3466 addr.sin_port = htons(var->val.num);
3467 if((newsock = netcslisten(SOCK_STREAM, (struct sockaddr *)&addr, sizeof(addr), peeraccept, NULL)) == NULL)
3468 flog(LOG_INFO, "could not listen to a remote address, going into passive mode");
3469 if(tcpsock != NULL)
3470 putsock(tcpsock);
3471 tcpsock = newsock;
3472 return(0);
3473}
3474
3475static int init(int hup)
3476{
3477 struct sockaddr_in addr;
3478
3479 if(!hup)
3480 {
3481 GCBREG(sharechangecb, shareupdate, NULL);
3482 if(udpsock != NULL)
3483 putsock(udpsock);
3484 if(tcpsock != NULL)
3485 putsock(tcpsock);
3486 addr.sin_family = AF_INET;
3487 memset(&addr.sin_addr, 0, sizeof(addr.sin_addr));
3488 addr.sin_port = htons(confgetint("dc", "udpport"));
3489 if((udpsock = netcsdgram((struct sockaddr *)&addr, sizeof(addr))) == NULL)
3490 {
3491 flog(LOG_CRIT, "could not create DC UDP socket: %s", strerror(errno));
3492 return(1);
3493 }
3494 udpsock->readcb = udpread;
3495 addr.sin_port = htons(confgetint("dc", "tcpport"));
3496 if((tcpsock = netcslisten(SOCK_STREAM, (struct sockaddr *)&addr, sizeof(addr), peeraccept, NULL)) == NULL)
3497 flog(LOG_INFO, "could not listen to a remote address, going into passive mode");
3498 CBREG(confgetvar("dc", "udpport"), conf_update, updateudpport, NULL, NULL);
3499 CBREG(confgetvar("dc", "tcpport"), conf_update, updatetcpport, NULL, NULL);
3500 CBREG(confgetvar("net", "mode"), conf_update, updatetcpport, NULL, NULL);
3501 }
3502 return(0);
3503}
3504
3505static void terminate(void)
3506{
3507 if(hmlistname != NULL)
3508 {
3509 unlink(hmlistname);
3510 free(hmlistname);
3511 }
3512 if(xmllistname != NULL)
3513 {
3514 unlink(xmllistname);
3515 free(xmllistname);
3516 }
3517 if(xmlbz2listname != NULL)
3518 {
3519 unlink(xmlbz2listname);
3520 free(xmlbz2listname);
3521 }
3522}
3523
3524static struct configvar myvars[] =
3525{
3526 {CONF_VAR_STRING, "desc", {.str = L""}},
3527 {CONF_VAR_STRING, "speedstring", {.str = L"LAN(T1)"}},
3528 {CONF_VAR_STRING, "email", {.str = L"spam@spam.org"}},
3529 {CONF_VAR_INT, "udpport", {.num = 0}},
3530 {CONF_VAR_INT, "tcpport", {.num = 0}},
3531 {CONF_VAR_END}
3532};
3533
3534static struct module me =
3535{
3536 .conf =
3537 {
3538 .vars = myvars
3539 },
3540 .preinit = preinit,
3541 .init = init,
3542 .run = run,
3543 .terminate = terminate,
3544 .name = "dc"
3545};
3546
3547MODULE(me)
Dolda Connect