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Enable passing of args to fnetnodes.
[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
1429static void cmd_mynick(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1430{
9a2d6cb8 1431 struct dcexppeer *expect;
1432
d3372da9 1433 if(peer->nativename != NULL)
1434 free(peer->nativename);
1435 peer->nativename = sstrdup(args);
1436 if(peer->wcsname != NULL)
1437 free(peer->wcsname);
1438 if((peer->wcsname = icmbstowcs(peer->nativename, DCCHARSET)) == NULL)
1439 {
1440 freedcpeer(peer);
1441 return;
1442 }
9a2d6cb8 1443 if(peer->accepted)
1444 {
1445 for(expect = expected; expect != NULL; expect = expect->next)
1446 {
1447 if(!strcmp(expect->nick, args))
1448 break;
1449 }
1450 if(expect == NULL)
1451 {
1452 peer->fn = NULL;
1453 } else {
1454 peer->fn = expect->fn;
1455 getfnetnode(peer->fn);
1456 freeexppeer(expect);
1457 }
1458 }
d3372da9 1459}
1460
1461static void cmd_direction(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1462{
1463 char *p;
9a2d6cb8 1464 int mydir;
1465 struct transfer *transfer;
d3372da9 1466
1467 if((p = strchr(args, ' ')) == NULL)
1468 return;
1469 *p = 0;
1470 if(!strcmp(args, "Upload"))
9a2d6cb8 1471 mydir = TRNSD_DOWN;
d3372da9 1472 if(!strcmp(args, "Download"))
9a2d6cb8 1473 mydir = TRNSD_UP;
1474 if(peer->accepted)
1475 {
1476 if((peer->transfer == NULL) || (mydir != peer->direction))
1477 {
1478 freedcpeer(peer);
1479 return;
1480 }
1b14d3d8 1481 if(peer->direction == TRNSD_DOWN)
1482 requestfile(peer);
9a2d6cb8 1483 } else {
1484 if(peer->wcsname == NULL)
1485 {
1486 freedcpeer(peer);
1487 return;
1488 }
1489 peer->direction = mydir;
1490 if(peer->direction == TRNSD_UP)
1491 {
1492 transfer = newupload(peer->fn, &dcnet, peer->wcsname, &dctransfer, peer);
1493 } else {
1494 if((transfer = finddownload(peer->wcsname)) == NULL)
1495 {
1496 freedcpeer(peer);
1497 return;
1498 }
1499 transferattach(transfer, &dctransfer, peer);
1500 transfersetstate(transfer, TRNS_HS);
1501 }
1502 transfersetnick(transfer, peer->wcsname);
1503 peer->transfer = transfer;
1504 if(peer->extended)
1505 sendsupports(peer);
1506 qstrf(sk, "$Direction %s %i|", (peer->direction == TRNSD_UP)?"Upload":"Download", rand() % 10000);
1507 if(peer->key != NULL)
1508 qstrf(sk, "$Key %s|", peer->key);
1509 if(peer->direction == TRNSD_DOWN)
1510 requestfile(peer);
1511 }
d3372da9 1512}
1513
1514static void cmd_peerlock(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1515{
9a2d6cb8 1516 char *p, *key;
1517 struct transfer *transfer;
d3372da9 1518
1519 if((p = strchr(args, ' ')) == NULL)
1520 return;
1521 *p = 0;
1522 if(!strncmp(args, "EXTENDEDPROTOCOL", 16))
1523 peer->extended = 1;
9a2d6cb8 1524 key = dcmakekey(args);
1525 if(peer->accepted)
1526 {
1527 if(peer->wcsname == NULL)
1528 {
1529 freedcpeer(peer);
1530 return;
1531 }
1532 sendmynick(peer);
1533 sendpeerlock(peer);
1534 if(peer->extended)
1535 sendsupports(peer);
1536 if((transfer = finddownload(peer->wcsname)) == NULL)
1537 {
1538 peer->direction = TRNSD_UP;
1539 transfer = newupload(peer->fn, &dcnet, peer->wcsname, &dctransfer, peer);
1540 } else {
1541 peer->direction = TRNSD_DOWN;
1542 transferattach(transfer, &dctransfer, peer);
1543 transfersetstate(transfer, TRNS_HS);
1544 }
1545 transfersetnick(transfer, peer->wcsname);
1546 peer->transfer = transfer;
1547 qstrf(sk, "$Direction %s %i|", (peer->direction == TRNSD_UP)?"Upload":"Download", rand() % 10000);
1548 qstrf(sk, "$Key %s|", key);
1549 } else {
1550 if(peer->key != NULL)
1551 free(peer->key);
1552 peer->key = key;
1553 }
d3372da9 1554}
1555
1556static void cmd_key(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1557{
9a2d6cb8 1558 /* NOP */
1559}
1560
1561static void startdl(struct dcpeer *peer)
1562{
1563 peer->state = PEER_TRNS;
1564 transferstartdl(peer->transfer, peer->sk);
1565 peer->sk->readcb = (void (*)(struct socket *, void *))transread;
1566 peer->sk->errcb = (void (*)(struct socket *, int, void *))transerr;
1567}
1568
1569static void startul(struct dcpeer *peer)
1570{
1571 peer->state = PEER_TRNS;
1572 transferstartul(peer->transfer, peer->sk);
1573 peer->sk->writecb = (void (*)(struct socket *, void *))transwrite;
d3372da9 1574}
1575
1576static void cmd_filelength(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1577{
1578 int size;
1579
1580 if(peer->transfer == NULL)
1581 {
1582 freedcpeer(peer);
1583 return;
1584 }
1585 size = atoi(args);
9a2d6cb8 1586 if(peer->transfer->size != size)
d3372da9 1587 {
d3372da9 1588 transfersetsize(peer->transfer, size);
1589 freedcpeer(peer);
1590 return;
1591 }
9a2d6cb8 1592 startdl(peer);
1593 qstr(peer->sk, "$Send|");
d3372da9 1594}
1595
1596static void cmd_error(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1597{
1598 if((peer->transfer != NULL) && (peer->transfer->dir == TRNSD_DOWN))
1599 {
1600 transferseterror(peer->transfer, TRNSE_NOTFOUND);
1601 resettransfer(peer->transfer);
1602 return;
1603 }
1604 freedcpeer(peer);
1605}
1606
1607static void cmd_maxedout(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1608{
1609 if((peer->transfer != NULL) && (peer->transfer->dir == TRNSD_DOWN))
1610 {
1611 transferseterror(peer->transfer, TRNSE_NOSLOTS);
1612 resettransfer(peer->transfer);
1613 return;
1614 }
1615 freedcpeer(peer);
1616}
1617
1618static struct
1619{
1620 char *name;
1621 char **file;
1622 void (*func)(void);
1623} lists[] =
1624{
1625 {"MyList.DcLst", &hmlistname, updatehmlist},
1626 {"files.xml", &xmllistname, updatexmllist},
1627 {"files.xml.bz2", &xmlbz2listname, updatexmlbz2list},
1628 {NULL, NULL}
1629};
1630
1631static int openfilelist(char *name)
1632{
1633 int i, fd;
1634 int errnobak;
1635
1636 for(i = 0; lists[i].name != NULL; i++)
1637 {
1638 if(!strcmp(name, lists[i].name))
1639 break;
1640 }
1641 errno = 0;
1642 if(lists[i].name == NULL)
1643 return(-1);
1644 fd = -1;
1645 if((*lists[i].file == NULL) || ((fd = open(*lists[i].file, O_RDONLY)) < 0))
1646 lists[i].func();
1647 if((fd < 0) && ((*lists[i].file == NULL) || ((fd = open(*lists[i].file, O_RDONLY)) < 0)))
1648 {
1649 errnobak = errno;
1650 flog(LOG_ERR, "could not open filelist tempfile: %s", strerror(errno));
1651 errno = errnobak;
1652 return(-1);
1653 }
1654 return(fd);
1655}
1656
1657static struct sharecache *findbytth(char *tth32)
1658{
1659 char *buf;
1660 size_t buflen;
1661 struct sharecache *node;
1662
1663 if((buf = base32decode(tth32, &buflen)) == NULL)
1664 return(NULL);
1665 if(buflen != 24)
1666 {
1667 free(buf);
1668 return(NULL);
1669 }
1670 for(node = shareroot->child; node != NULL; node = nextscnode(node))
1671 {
1672 if(node->f.b.hastth && !memcmp(node->hashtth, buf, 24))
1673 break;
1674 }
1675 free(buf);
1676 return(node);
1677}
1678
1679static struct sharecache *resdcpath(char *path, char *charset, char sep)
1680{
1681 struct sharecache *node;
1682 char *p, *p2;
1683
1684 node = shareroot;
1685 p = path;
1686 while(p != NULL)
1687 {
1688 if((p2 = strchr(p, sep)) != NULL)
1689 *(p2++) = 0;
1690 if((node = findcache(node, icsmbstowcs(p, charset, L""))) == NULL)
1691 return(NULL);
1692 p = p2;
1693 }
1694 return(node);
1695}
1696
1697static void cmd_get(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1698{
1699 int offset;
1700 char *p, *buf;
1701 wchar_t *buf2;
1702 struct sharecache *node;
1703 struct socket *lesk;
1704 int fd;
1705 struct stat sb;
1706
1707 if(peer->transfer == NULL)
1708 {
1709 freedcpeer(peer);
1710 return;
1711 }
1712 if((p = strchr(args, '$')) == NULL)
1713 {
1714 freedcpeer(peer);
1715 return;
1716 }
1717 *(p++) = 0;
1718 if((offset = (atoi(p) - 1)) < 0)
1719 {
1720 freedcpeer(peer);
1721 return;
1722 }
1723 if(((fd = openfilelist(args)) < 0) && (errno != 0))
1724 {
1725 qstr(sk, "$Error Could not send file list|");
1726 freedcpeer(peer);
1727 return;
1728 } else if(fd >= 0) {
1729 if((buf2 = icsmbstowcs(args, DCCHARSET, NULL)) != NULL)
1730 transfersetpath(peer->transfer, buf2);
1731 }
1732 if(fd < 0)
1733 {
1734 if(slotsleft() < 1)
1735 {
1736 qstr(sk, "$MaxedOut|");
1737 freedcpeer(peer);
1738 return;
1739 }
1740 if((node = resdcpath(args, DCCHARSET, '\\')) == NULL)
1741 {
1742 qstrf(sk, "$Error File not in share|");
1743 freedcpeer(peer);
1744 return;
1745 }
1746 if((fd = opensharecache(node)) < 0)
1747 {
1748 qstrf(sk, "$Error %s|", strerror(errno));
1749 freedcpeer(peer);
1750 return;
1751 }
1752 buf = getfspath(node);
1753 if((buf2 = icsmbstowcs(buf, NULL, NULL)) == NULL)
1754 flog(LOG_WARNING, "could not convert native path into a wcs (%s): %s", buf, strerror(errno));
1755 else
1756 transfersetpath(peer->transfer, buf2);
1757 free(buf);
1758 }
1759 if(fstat(fd, &sb) < 0)
1760 {
1761 close(fd);
1762 flog(LOG_WARNING, "could not stat file %ls: %s", node->name, strerror(errno));
1763 qstrf(sk, "$Error|");
1764 freedcpeer(peer);
1765 return;
1766 }
1767 if((offset != 0) && (lseek(fd, offset, SEEK_SET) < 0))
1768 {
1769 close(fd);
1770 qstrf(sk, "$Error Offset out of range|");
1771 freedcpeer(peer);
1772 return;
1773 }
1774 lesk = wrapsock(fd);
1775 transferprepul(peer->transfer, sb.st_size, offset, -1, lesk);
1776 putsock(lesk);
1777 qstrf(sk, "$FileLength %i|", peer->transfer->size);
d3372da9 1778}
1779
1780static void cmd_send(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1781{
1782 if(peer->transfer == NULL)
1783 {
1784 freedcpeer(peer);
1785 return;
1786 }
1787 if(peer->transfer->localend == NULL)
1788 {
1789 freedcpeer(peer);
1790 return;
1791 }
1792 peer->ptclose = 1;
9a2d6cb8 1793 startul(peer);
d3372da9 1794}
1795
1796static void cmd_supports(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1797{
1798 int i;
1799 char *p, *p2;
1800 char **arr;
1801 size_t arrsize, arrdata;
1802
1803 if(peer->supports != NULL)
1804 {
1805 for(i = 0; peer->supports[i] != NULL; i++)
1806 free(peer->supports[i]);
1807 free(peer->supports);
1808 }
1809 arr = NULL;
1810 arrsize = arrdata = 0;
1811 p = args;
1812 do
1813 {
1814 if((p2 = strchr(p, ' ')) != NULL)
1815 *(p2++) = 0;
1816 if(*p == 0)
1817 continue;
1818 addtobuf(arr, sstrdup(p));
1819 } while((p = p2) != NULL);
1820 addtobuf(arr, NULL);
1821 peer->supports = arr;
d3372da9 1822}
1823
1824static void cmd_getblock(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1825{
1826 int fd;
1827 char *p, *p2;
1828 int start, numbytes;
1829 char *charset, *buf;
1830 wchar_t *buf2;
1831 struct sharecache *node;
1832 struct stat sb;
1833 struct socket *lesk;
1834
1835 if(peer->transfer == NULL)
1836 {
1837 freedcpeer(peer);
1838 return;
1839 }
1840 p = args;
1841 if((p2 = strchr(p, ' ')) == NULL)
1842 {
1843 freedcpeer(peer);
1844 return;
1845 }
1846 *(p2++) = 0;
1847 start = atoi(p);
1848 p = p2;
1849 if((p2 = strchr(p, ' ')) == NULL)
1850 {
1851 freedcpeer(peer);
1852 return;
1853 }
1854 *(p2++) = 0;
1855 numbytes = atoi(p);
1856 p = p2;
1857 if(!strcmp(cmd, "$UGetBlock") || !strcmp(cmd, "$UGetZBlock"))
1858 charset = "UTF-8";
1859 else
1860 charset = DCCHARSET;
1861 if(!strcmp(cmd, "$GetZBlock") || !strcmp(cmd, "$UGetZBlock"))
1862 initcompress(peer, CPRS_ZLIB);
1863 if(((fd = openfilelist(p)) < 0) && (errno != 0))
1864 {
1865 qstr(sk, "$Error Could not send file list|");
1866 return;
1867 } else if(fd >= 0) {
1868 if((buf2 = icsmbstowcs(args, charset, NULL)) != NULL)
1869 transfersetpath(peer->transfer, buf2);
1870 }
1871 if(fd < 0)
1872 {
1873 if(slotsleft() < 1)
1874 {
1875 qstr(sk, "$MaxedOut|");
1876 return;
1877 }
1878 if((node = resdcpath(p, charset, '\\')) == NULL)
1879 {
1880 qstr(sk, "$Error File not in cache|");
1881 return;
1882 }
1883 if((fd = opensharecache(node)) < 0)
1884 {
1885 qstrf(sk, "$Error %s|", strerror(errno));
1886 return;
1887 }
1888 buf = getfspath(node);
1889 if((buf2 = icsmbstowcs(buf, NULL, NULL)) == NULL)
1890 flog(LOG_WARNING, "could not convert native path into a wcs (%s): %s", buf, strerror(errno));
1891 else
1892 transfersetpath(peer->transfer, buf2);
1893 free(buf);
1894 }
1895 if(fstat(fd, &sb) < 0)
1896 {
1897 close(fd);
1898 flog(LOG_WARNING, "could not stat file %ls: %s", node->name, strerror(errno));
1899 qstr(sk, "$Error|");
1900 return;
1901 }
1902 if((start != 0) && ((start >= sb.st_size) || (lseek(fd, start, SEEK_SET) < 0)))
1903 {
1904 close(fd);
1905 qstr(sk, "$Error Offset out of range|");
1906 return;
1907 }
1908 if((numbytes < 0) || (start + numbytes > sb.st_size))
1909 numbytes = sb.st_size - start;
1910 lesk = wrapsock(fd);
1911 transferprepul(peer->transfer, sb.st_size, start, start + numbytes, lesk);
1912 putsock(lesk);
1913 qstrf(sk, "$Sending %i|", numbytes);
9a2d6cb8 1914 startul(peer);
d3372da9 1915}
1916
1917static void cmd_adcget(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1918{
1919 int i;
1920 char **argv, *buf;
1921 int start, numbytes;
1922 struct sharecache *node;
1923 struct stat sb;
1924 struct socket *lesk;
1925 wchar_t *wbuf;
1926 int fd;
1927
1928 if(peer->transfer == NULL)
1929 {
1930 freedcpeer(peer);
1931 return;
1932 }
1933 if((argv = parseadc(args)) == NULL)
1934 {
1935 freedcpeer(peer);
1936 return;
1937 }
1938 if(parrlen(argv) < 4)
1939 {
1940 freedcpeer(peer);
1941 goto out;
1942 }
1943 start = atoi(argv[2]);
1944 numbytes = atoi(argv[3]);
1945 node = NULL;
1946 fd = -1;
1947 if(((fd = openfilelist(argv[1])) < 0) && (errno != 0))
1948 {
1949 qstr(sk, "$Error Could not send file list|");
1950 goto out;
1951 } else if(fd >= 0) {
1952 if((wbuf = icsmbstowcs(argv[1], "UTF-8", NULL)) != NULL)
1953 transfersetpath(peer->transfer, wbuf);
1954 }
1955 if(fd < 0)
1956 {
1957 if(slotsleft() < 1)
1958 {
1959 qstr(sk, "$MaxedOut|");
1960 goto out;
1961 }
1962 if(!strncmp(argv[1], "TTH/", 4))
1963 {
1964 if((node = findbytth(argv[1] + 4)) == NULL)
1965 {
1966 qstr(sk, "$Error File not in cache|");
1967 goto out;
1968 }
1969 } else {
9a2d6cb8 1970 if((node = resdcpath((argv[1][0] == '/')?(argv[1] + 1):(argv[1]), "UTF-8", '/')) == NULL)
d3372da9 1971 {
1972 qstr(sk, "$Error File not in cache|");
1973 goto out;
1974 }
1975 }
1976 if((fd = opensharecache(node)) < 0)
1977 {
1978 qstrf(sk, "$Error %s|", strerror(errno));
1979 goto out;
1980 }
1981 buf = getfspath(node);
1982 if((wbuf = icsmbstowcs(buf, NULL, NULL)) == NULL)
1983 flog(LOG_WARNING, "could not convert native path into a wcs (%s): %s", buf, strerror(errno));
1984 else
1985 transfersetpath(peer->transfer, wbuf);
1986 free(buf);
1987 }
1988 if(!strcmp(argv[0], "file"))
1989 {
1990 for(i = 4; argv[i] != NULL; i++)
1991 {
1992 if(!strcmp(argv[i], "ZL1"))
1993 initcompress(peer, CPRS_ZLIB);
1994 }
1995 if(fstat(fd, &sb) < 0)
1996 {
1997 flog(LOG_WARNING, "could not stat file %ls: %s", node->name, strerror(errno));
1998 qstr(sk, "$Error|");
1999 goto out;
2000 }
2001 if((start != 0) && ((start >= sb.st_size) || (lseek(fd, start, SEEK_SET) < 0)))
2002 {
2003 qstr(sk, "$Error Offset out of range|");
2004 goto out;
2005 }
2006 if((numbytes < 0) || (start + numbytes > sb.st_size))
2007 numbytes = sb.st_size - start;
2008 lesk = wrapsock(fd);
2009 transferprepul(peer->transfer, sb.st_size, start, start + numbytes, lesk);
2010 putsock(lesk);
2011 fd = -1;
2012 qstr(sk, "$ADCSND");
2013 sendadc(sk, "file");
2014 sendadc(sk, argv[1]);
2015 sendadcf(sk, "%i", start);
2016 sendadcf(sk, "%i", numbytes);
2017 if(peer->compress == CPRS_ZLIB)
2018 sendadc(sk, "ZL1");
2019 qstr(sk, "|");
9a2d6cb8 2020 startul(peer);
d3372da9 2021 } else if(!strcmp(argv[0], "tthl")) {
2022 /*
2023 * XXX: Implement full TTHL support.
2024 *
2025 * In the meantime, this is better than nothing, since it at
2026 * least allows fetching of the TTH root if it isn't already
2027 * known.
2028 */
2029 if(node == NULL)
2030 {
2031 qstr(sk, "$Error no TTHL data for virtual files|");
2032 goto out;
2033 }
2034 qstr(sk, "$ADCSND");
2035 sendadc(sk, "tthl");
2036 sendadc(sk, argv[1]);
2037 sendadc(sk, "0");
2038 sendadc(sk, "24");
2039 qstr(sk, "|");
2040 sockqueue(sk, node->hashtth, 24);
2041 } else {
2042 qstr(sk, "$Error Namespace not implemented|");
2043 goto out;
2044 }
d3372da9 2045
2046 out:
2047 if(fd >= 0)
2048 close(fd);
2049 freeparr(argv);
2050}
2051
9a2d6cb8 2052static void handletthl(struct dcpeer *peer)
2053{
2054 char buf[24];
2055
2056 while(peer->inbufdata >= 24)
2057 {
2058 pushtigertree(&peer->tth, peer->inbuf);
2059 memmove(peer->inbuf, peer->inbuf + 24, peer->inbufdata -= 24);
e52006fe 2060 peer->curread += 24;
9a2d6cb8 2061 }
e52006fe 2062 if(peer->curread >= peer->totalsize)
9a2d6cb8 2063 {
2064 peer->state = PEER_CMD;
2065 synctigertree(&peer->tth);
2066 restigertree(&peer->tth, buf);
2067 transfersethash(peer->transfer, newhash(L"TTH", 24, buf));
2068 requestfile(peer);
2069 }
2070}
2071
2072static void cmd_adcsnd(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
2073{
2074 char **argv;
2075 int start, numbytes;
2076
2077 if(peer->transfer == NULL)
2078 {
2079 freedcpeer(peer);
2080 return;
2081 }
2082 if((argv = parseadc(args)) == NULL)
2083 {
2084 freedcpeer(peer);
2085 return;
2086 }
2087 if(parrlen(argv) < 4)
2088 {
2089 freedcpeer(peer);
2090 goto out;
2091 }
2092 start = atoi(argv[2]);
2093 numbytes = atoi(argv[3]);
2094 if(!strcmp(argv[0], "tthl"))
2095 {
2096 if((start != 0) || (numbytes % 24 != 0))
2097 {
2098 /* Weird. Bail out. */
2099 freedcpeer(peer);
2100 goto out;
2101 }
2102 peer->state = PEER_TTHL;
2103 peer->totalsize = numbytes;
2104 peer->curread = 0;
2105 inittigertree(&peer->tth);
2106 handletthl(peer);
2107 } else if(!strcmp(argv[0], "file")) {
2108 if(start != peer->transfer->curpos)
2109 {
2110 freedcpeer(peer);
2111 goto out;
2112 }
2113 if(start + numbytes != peer->transfer->size)
2114 {
2115 transfersetsize(peer->transfer, start + numbytes);
2116 freedcpeer(peer);
2117 goto out;
2118 }
2119 startdl(peer);
e52006fe 2120 if(peer->inbufdata > 0)
2121 {
2122 sockpushdata(sk, peer->inbuf, peer->inbufdata);
2123 peer->inbufdata = 0;
2124 transread(sk, peer);
2125 }
9a2d6cb8 2126 } else {
2127 /* We certainly didn't request this...*/
2128 freedcpeer(peer);
2129 goto out;
2130 }
2131
2132 out:
2133 freeparr(argv);
2134}
2135
2136static void cmd_sending(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
2137{
2138 int numbytes;
2139
2140 if(peer->transfer == NULL)
2141 {
2142 freedcpeer(peer);
2143 return;
2144 }
2145 numbytes = atoi(args);
2146 if(peer->transfer->size - peer->transfer->curpos != numbytes)
2147 {
2148 transfersetsize(peer->transfer, peer->transfer->curpos + numbytes);
2149 freedcpeer(peer);
2150 return;
2151 }
2152 startdl(peer);
0d8c93cb 2153 if(peer->inbufdata > 0)
2154 {
2155 sockpushdata(sk, peer->inbuf, peer->inbufdata);
2156 peer->inbufdata = 0;
2157 transread(sk, peer);
2158 }
9a2d6cb8 2159}
2160
d3372da9 2161/*
2162Hub skeleton:
2163static void cmd_(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
2164{
2165 struct dchub *hub;
2166
2167 hub = fn->data;
2168 hubhandleaction(sk, fn, cmd, args);
2169}
2170
2171Peer skeleton:
2172static void cmd_(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
2173{
d3372da9 2174}
2175
2176*/
2177
2178static int hubreqconn(struct fnetpeer *peer)
2179{
2180 struct dchub *hub;
2181 char *mbsnick;
2182
2183 if((peer->fn->state != FNN_EST) || (peer->fn->fnet != &dcnet))
2184 {
2185 errno = EINVAL;
2186 return(1);
2187 }
2188 if((hub = peer->fn->data) == NULL)
2189 {
2190 errno = EFAULT;
2191 return(1);
2192 }
2193 if((mbsnick = icwcstombs(peer->id, DCCHARSET)) == NULL)
2194 return(1); /* Shouldn't happen, of course, but who knows... */
2195 if(tcpsock != NULL)
2196 {
2197 sendctm(peer->fn->sk, mbsnick);
2198 expectpeer(mbsnick, peer->fn);
2199 } else {
2200 qstrf(peer->fn->sk, "$RevConnectToMe %s %s|", hub->nativenick, mbsnick);
2201 }
2202 free(mbsnick);
2203 return(0);
2204}
2205
2206static int hubsendchat(struct fnetnode *fn, int public, wchar_t *to, wchar_t *string)
2207{
2208 struct dchub *hub;
2209 char *mbsstring, *mbsto;
2210
2211 hub = fn->data;
2212 if((mbsto = icwcstombs(to, DCCHARSET)) == NULL)
2213 {
2214 errno = EILSEQ;
2215 return(1);
2216 }
2217 if((mbsstring = icwcstombs(string, DCCHARSET)) == NULL)
2218 {
2219 errno = EILSEQ;
2220 return(1);
2221 }
2222 if((strchr(mbsto, '|') != NULL) || (strchr(mbsto, ' ') != NULL))
2223 {
2224 free(mbsto);
2225 free(mbsstring);
2226 errno = ESRCH;
2227 return(1);
2228 }
2229 if(strchr(mbsstring, '|') != NULL)
2230 {
2231 free(mbsto);
2232 free(mbsstring);
2233 errno = EILSEQ;
2234 return(1);
2235 }
2236 if(public)
2237 {
2238 if(*to == L'\0')
2239 {
2240 qstrf(fn->sk, "<%s> %s|", hub->nativenick, mbsstring);
2241 } else {
2242 qstrf(fn->sk, "$To: %s From: %s $<%s> %s|", mbsto, hub->nativenick, hub->nativenick, mbsstring);
2243 }
2244 } else {
2245 qstrf(fn->sk, "$To: %s From: %s $<%s> %s|", mbsto, hub->nativenick, hub->nativenick, mbsstring);
2246 }
2247 free(mbsto);
2248 free(mbsstring);
2249 return(0);
2250}
2251
2252static void findsizelimit(struct sexpr *sexpr, int *min, int *max)
2253{
2254 int minl, maxl, minr, maxr, retmin, retmax;
2255
2256 switch(sexpr->op)
2257 {
2258 case SOP_AND:
2259 findsizelimit(sexpr->l, &minl, &maxl);
2260 findsizelimit(sexpr->r, &minr, &maxr);
2261 retmin = (minl > minr)?minl:minr;
2262 if((maxl != -1) && (maxr != -1))
2263 retmax = (maxl < maxr)?maxl:maxr;
2264 else if(maxl != -1)
2265 retmax = maxl;
2266 else if(maxr != -1)
2267 retmax = maxr;
2268 else
2269 retmax = -1;
2270 break;
2271 case SOP_OR:
2272 findsizelimit(sexpr->l, &minl, &maxl);
2273 findsizelimit(sexpr->r, &minr, &maxr);
2274 retmin = (minl < minr)?minl:minr;
2275 if((maxl == -1) || (maxr == -1))
2276 retmax = -1;
2277 else
2278 retmax = (maxl > maxr)?maxl:maxr;
2279 break;
2280 case SOP_NOT:
2281 findsizelimit(sexpr->l, &minl, &maxl);
2282 if((minl == 0) && (maxl == -1)) /* Interval is unspecified */
2283 {
2284 retmin = 0;
2285 retmax = -1;
2286 } else if((minl == 0) && (maxl != -1)) {
2287 retmin = maxl + 1;
2288 retmax = -1;
2289 } else if((minl != 0) && (maxl == -1)) {
2290 retmin = 0;
2291 retmax = minl - 1;
2292 } else { /* This would yield two seperate intervals, which DC cannot handle */
2293 retmin = 0;
2294 retmax = -1;
2295 }
2296 case SOP_SIZELT:
2297 retmin = 0;
2298 retmax = sexpr->d.n - 1;
2299 break;
2300 case SOP_SIZEEQ:
2301 retmin = sexpr->d.n;
2302 retmax = sexpr->d.n;
2303 break;
2304 case SOP_SIZEGT:
2305 retmin = sexpr->d.n + 1;
2306 retmax = -1;
2307 break;
2308 default:
2309 retmin = 0;
2310 retmax = -1;
2311 break;
2312 }
2313 if(min != NULL)
2314 *min = retmin;
2315 if(max != NULL)
2316 *max = retmax;
2317}
2318
9d8cf743 2319static struct hash *findsehash(struct sexpr *sexpr)
2320{
2321 struct hash *h1, *h2;
2322
2323 switch(sexpr->op)
2324 {
2325 case SOP_AND:
2326 if((h1 = findsehash(sexpr->l)) != NULL)
2327 return(h1);
2328 if((h1 = findsehash(sexpr->r)) != NULL)
2329 return(h1);
2330 break;
2331 case SOP_OR:
2332 h1 = findsehash(sexpr->l);
2333 h2 = findsehash(sexpr->r);
2334 if(hashcmp(h1, h2))
2335 return(h1);
2336 break;
2337 case SOP_HASHIS:
2338 if(!wcscmp(sexpr->d.hash->algo, L"TTH"))
2339 return(sexpr->d.hash);
2340 default:
2341 break;
2342 }
2343 return(NULL);
2344}
2345
d3372da9 2346static int hubsearch(struct fnetnode *fn, struct search *srch, struct srchfnnlist *ln)
2347{
2348 struct dchub *hub;
2349 struct wcslist *list, *cur;
2350 char *sstr, *buf, *p;
2351 size_t sstrsize, sstrdata;
2352 struct sockaddr *name;
2353 socklen_t namelen;
2354 int minsize, maxsize;
9d8cf743 2355 struct hash *hash;
d3372da9 2356
2357 hub = fn->data;
2358 if((fn->state != FNN_EST) || (fn->sk == NULL) || (fn->sk->state != SOCK_EST))
2359 return(1);
2360 list = findsexprstrs(srch->sexpr);
2361 findsizelimit(srch->sexpr, &minsize, &maxsize);
9d8cf743 2362 hash = findsehash(srch->sexpr);
d3372da9 2363 if((minsize != 0) && (maxsize != -1))
2364 {
2365 /* Choose either minsize or maxsize by trying to determine
2366 * which choice will be most restrictive. The result can be
2367 * approximative at best anyway, so don't try too hard... */
2368 if((50000000 - maxsize) > (minsize - 50000000))
2369 minsize = 0;
2370 else
2371 maxsize = -1;
2372 }
d3372da9 2373 sstr = NULL;
2374 sstrsize = sstrdata = 0;
9d8cf743 2375 if((hash != NULL) && (hash->len == 24))
d3372da9 2376 {
9d8cf743 2377 /* Prioritize hash searches above all else */
2378 bufcat(sstr, "F?T?0?9?TTH:", 12);
2379 buf = base32encode(hash->buf, hash->len);
2380
2381 bufcat(sstr, buf, 39);
2382 free(buf);
2383 } else {
2384 if(minsize != 0)
d3372da9 2385 {
9d8cf743 2386 sizebuf2(sstr, sstrdata + 32, 1);
2387 snprintf(sstr + sstrdata, sstrsize - sstrdata, "T?F?%i?1?", minsize);
2388 } else if(maxsize != -1) {
2389 sizebuf2(sstr, sstrdata + 32, 1);
2390 snprintf(sstr + sstrdata, sstrsize - sstrdata, "T?T?%i?1?", maxsize);
2391 } else {
2392 bufcat(sstr, "F?F?0?1?", 8);
2393 }
2394 if(list != NULL)
2395 {
2396 for(cur = list; cur != NULL; cur = cur->next)
d3372da9 2397 {
9d8cf743 2398 if((buf = icwcstombs(cur->str, DCCHARSET)) == NULL)
2399 {
2400 /* Can't find anything anyway if the search expression
2401 * requires characters outside DC's charset. There's
2402 * nothing technically wrong with the search itself,
2403 * however, so return success. This should be
2404 * considered as an optimization. */
2405 freesl(&list);
2406 if(sstr != NULL)
2407 free(sstr);
2408 return(0);
2409 }
2410 if(cur != list)
2411 addtobuf(sstr, '$');
2412 /*
2413 * It probably doesn't hurt if buf contains any extra
2414 * dollar signs - it will just result in extra search
2415 * terms, and the extraneous results will be filtered by
2416 * the search layer anyway. It hurts if it contains any
2417 * pipes, though, so let's sell them for money.
2418 */
2419 for(p = buf; *p; p++)
2420 {
2421 if(*p == '|')
2422 *p = '$';
2423 }
2424 bufcat(sstr, buf, strlen(buf));
2425 free(buf);
d3372da9 2426 }
9d8cf743 2427 } else {
2428 /* Will match all files... :-/ */
2429 addtobuf(sstr, '.');
d3372da9 2430 }
d3372da9 2431 }
2432 addtobuf(sstr, 0);
2433 if(tcpsock != NULL)
2434 {
2435 if(sockgetremotename(udpsock, &name, &namelen) < 0)
2436 {
2437 flog(LOG_WARNING, "cannot get address of UDP socket");
2438 } else {
9d8cf743 2439 qstrf(fn->sk, "$Search %s %s|", formataddress(name, namelen), sstr);
d3372da9 2440 free(name);
2441 }
2442 } else {
9d8cf743 2443 qstrf(fn->sk, "$Search Hub:%s %s|", hub->nativenick, sstr);
d3372da9 2444 }
2445 free(sstr);
2446 freesl(&list);
2447 fn->lastsrch = time(NULL);
2448 return(0);
2449}
2450
2451#undef skipcmd
2452#undef qstr
2453#undef qstrf
2454
2455#define cc(c) ((void (*)(struct socket *, void *, char *, char *))(c))
2456struct command hubcmds[] =
2457{
2458 {"$Lock", cc(cmd_lock)},
2459 {"$HubName", cc(cmd_hubname)},
2460 {"$Hello", cc(cmd_hello)},
2461 {"$Quit", cc(cmd_quit)},
2462 {"$NickList", cc(cmd_nicklist)},
2463 {"$OpList", cc(cmd_oplist)},
2464 {"$MyINFO", cc(cmd_myinfo)},
2465 {"$ForceMove", cc(cmd_forcemove)},
2466 {"$Search", cc(cmd_search)},
2467 {"$MultiSearch", cc(cmd_search)},
2468 {"$ConnectToMe", cc(cmd_connecttome)},
2469 {"$RevConnectToMe", cc(cmd_revconnecttome)},
2470 {"$GetNetInfo", cc(cmd_getnetinfo)},
2471 {"$To:", cc(cmd_to)},
2472 {"$SR", cc(cmd_sr)},
2473 {"$UserCommand", cc(cmd_usercommand)},
2474 {NULL, NULL}
2475};
2476
2477struct command peercmds[] =
2478{
2479 {"$MyNick", cc(cmd_mynick)},
2480 {"$Lock", cc(cmd_peerlock)},
2481 {"$Direction", cc(cmd_direction)},
2482 {"$Key", cc(cmd_key)},
2483 {"$FileLength", cc(cmd_filelength)},
2484 {"$Error", cc(cmd_error)},
2485 {"$MaxedOut", cc(cmd_maxedout)},
2486 {"$Get", cc(cmd_get)},
2487 {"$Send", cc(cmd_send)},
2488 {"$Supports", cc(cmd_supports)},
2489 {"$GetBlock", cc(cmd_getblock)},
2490 {"$UGetBlock", cc(cmd_getblock)},
2491 {"$GetZBlock", cc(cmd_getblock)},
2492 {"$UGetZBlock", cc(cmd_getblock)},
2493 {"$ADCGET", cc(cmd_adcget)},
9a2d6cb8 2494 {"$ADCSND", cc(cmd_adcsnd), 1},
2495 {"$Sending", cc(cmd_sending), 1},
d3372da9 2496 {NULL, NULL}
2497};
2498#undef cc
2499
2500static void dctransdetach(struct transfer *transfer, struct dcpeer *peer)
2501{
2502 CBUNREG(transfer, trans_filterout, peer);
2503 if(peer->freeing)
2504 return;
2505 peer->transfer = NULL;
2506 freedcpeer(peer);
2507}
2508
2509static void dctransgotdata(struct transfer *transfer, struct dcpeer *peer)
2510{
2511 int ret;
2512 void *buf;
2513 char outbuf[1024];
2514 z_stream *cstr;
2515 size_t bufsize;
2516
2517 if((peer->state == PEER_TRNS) || (peer->state == PEER_SYNC))
2518 {
2519 if(sockqueuesize(peer->sk) < 65536)
2520 {
2521 if((buf = transfergetdata(transfer, &bufsize)) != NULL)
2522 {
2523 if(peer->compress == CPRS_NONE)
2524 {
2525 sockqueue(peer->sk, buf, bufsize);
2526 } else if(peer->compress == CPRS_ZLIB) {
2527 cstr = peer->cprsdata;
2528 cstr->next_in = buf;
2529 cstr->avail_in = bufsize;
2530 while(cstr->avail_in > 0)
2531 {
2532 cstr->next_out = outbuf;
2533 cstr->avail_out = sizeof(outbuf);
2534 if((ret = deflate(cstr, 0)) != Z_OK)
2535 {
2536 flog(LOG_WARNING, "bug? deflate() did not return Z_OK (but rather %i)", ret);
2537 freedcpeer(peer);
2538 return;
2539 }
2540 sockqueue(peer->sk, outbuf, sizeof(outbuf) - cstr->avail_out);
2541 }
2542 }
2543 free(buf);
2544 }
2545 if(peer->state == PEER_SYNC)
2546 {
2547 if(peer->compress == CPRS_ZLIB)
2548 {
2549 cstr = peer->cprsdata;
2550 cstr->next_in = NULL;
2551 cstr->avail_in = 0;
2552 do
2553 {
2554 cstr->next_out = outbuf;
2555 cstr->avail_out = sizeof(outbuf);
2556 ret = deflate(cstr, Z_FINISH);
2557 if((ret != Z_OK) && (ret != Z_STREAM_END))
2558 {
2559 flog(LOG_WARNING, "bug? deflate(Z_FINISH) 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 } while(ret != Z_STREAM_END);
2565 }
2566 if(peer->ptclose)
2567 {
2568 freedcpeer(peer);
2569 } else {
2570 peer->state = PEER_CMD;
2571 endcompress(peer);
2572 transfersetstate(transfer, TRNS_HS);
2573 socksettos(peer->sk, confgetint("fnet", "fnptos"));
2574 peer->sk->writecb = NULL;
2575 }
2576 }
2577 }
2578 }
2579}
2580
2581static void dctransendofdata(struct transfer *transfer, struct dcpeer *peer)
2582{
2583 peer->state = PEER_SYNC;
2584 dctransgotdata(transfer, peer);
2585}
2586
2587static void dcwantdata(struct transfer *transfer, struct dcpeer *peer)
2588{
2589 if(transferdatasize(transfer) < 65536)
2590 peer->sk->ignread = 0;
2591}
2592
2593static void transread(struct socket *sk, struct dcpeer *peer)
2594{
2595 void *buf;
2596 size_t bufsize;
2597 struct transfer *transfer;
2598
2599 if((buf = sockgetinbuf(sk, &bufsize)) == NULL)
2600 return;
2601 if(peer->transfer == NULL)
2602 {
2603 free(buf);
2604 freedcpeer(peer);
2605 return;
2606 }
2607 transferputdata(peer->transfer, buf, bufsize);
2608 free(buf);
2609 if(peer->transfer->curpos >= peer->transfer->size)
2610 {
2611 transfer = peer->transfer;
2612 transferdetach(transfer);
2613 transferendofdata(transfer);
2614 return;
2615 }
2616 if(transferdatasize(peer->transfer) > 65535)
2617 sk->ignread = 1;
2618}
2619
2620static void transerr(struct socket *sk, int err, struct dcpeer *peer)
2621{
2622 struct transfer *transfer;
2623
2624 if((transfer = peer->transfer) == NULL)
2625 {
2626 freedcpeer(peer);
2627 return;
2628 }
2629 transferdetach(transfer);
2630 transferendofdata(transfer);
2631}
2632
2633static void transwrite(struct socket *sk, struct dcpeer *peer)
2634{
2635 if((peer->state != PEER_TRNS) && (peer->state != PEER_SYNC))
2636 return;
2637 if(peer->transfer == NULL)
2638 {
2639 freedcpeer(peer);
2640 return;
2641 }
2642 dctransgotdata(peer->transfer, peer);
2643}
2644
2645static void udpread(struct socket *sk, void *data)
2646{
d86b7a9f 2647 char *buf, *p, *p2, *hashbuf;
2648 size_t buflen, hashlen;
d3372da9 2649 char *nick, *filename, *hubname;
2650 int size, slots;
2651 struct fnetnode *fn, *myfn;
2652 struct dchub *hub;
2653 struct srchres *sr;
2654 wchar_t *wnick, *wfile;
d86b7a9f 2655 struct hash *hash;
d3372da9 2656
2657 if((buf = sockgetinbuf(sk, &buflen)) == NULL)
2658 return;
2659 buf = srealloc(buf, buflen + 1);
2660 buf[buflen] = 0;
2661 if(!strncmp(buf, "$SR ", 4))
2662 {
2663 p = buf + 4;
2664 nick = p;
2665 if((p2 = strchr(p, ' ')) == NULL)
2666 {
2667 free(buf);
2668 return;
2669 }
2670 *p2 = 0;
2671 p = p2 + 1;
2672 filename = p;
2673 if((p2 = strchr(p, 5)) == NULL)
2674 {
2675 free(buf);
2676 return;
2677 }
2678 *p2 = 0;
2679 p = p2 + 1;
2680 if((p2 = strchr(p, ' ')) == NULL)
2681 {
2682 free(buf);
2683 return;
2684 }
2685 *p2 = 0;
2686 size = atoi(p);
2687 p = p2 + 1;
2688 if((p2 = strchr(p, '/')) == NULL)
2689 {
2690 free(buf);
2691 return;
2692 }
2693 *p2 = 0;
2694 slots = atoi(p);
2695 p = p2 + 1;
2696 if((p2 = strchr(p, 5)) == NULL)
2697 {
2698 free(buf);
2699 return;
2700 }
2701 p = p2 + 1;
2702 hubname = p;
2703 if((p2 = strstr(p, " (")) == NULL)
2704 {
2705 free(buf);
2706 return;
2707 }
2708 *p2 = 0;
2709 if((wnick = icmbstowcs(nick, DCCHARSET)) == NULL)
2710 {
2711 free(buf);
2712 return;
2713 }
2714 if((wfile = icmbstowcs(filename, DCCHARSET)) == NULL)
2715 {
2716 free(wnick);
2717 free(buf);
2718 return;
2719 }
2720 myfn = NULL;
d86b7a9f 2721 hash = NULL;
2722 if(!strncmp(hubname, "TTH:", 4))
d3372da9 2723 {
d86b7a9f 2724 if((hashbuf = base32decode(hubname + 4, &hashlen)) != NULL)
2725 {
2726 if(hashlen == 24)
2727 hash = newhash(L"TTH", 24, hashbuf);
2728 free(hashbuf);
2729 }
2730 } else {
2731 for(fn = fnetnodes; fn != NULL; fn = fn->next)
d3372da9 2732 {
d86b7a9f 2733 if((fn->fnet == &dcnet) && ((hub = fn->data) != NULL))
d3372da9 2734 {
d86b7a9f 2735 if((hub->nativename != NULL) && !strcmp(hub->nativename, hubname))
d3372da9 2736 {
d86b7a9f 2737 if(myfn == NULL)
2738 {
2739 myfn = fn;
2740 } else {
2741 myfn = NULL;
2742 break;
2743 }
d3372da9 2744 }
2745 }
2746 }
2747 }
2748 sr = newsrchres(&dcnet, wfile, wnick);
2749 if(sr->peernick != NULL)
2750 free(sr->peernick);
2751 sr->peernick = swcsdup(wnick);
2752 sr->size = size;
2753 sr->slots = slots;
2754 free(wfile);
2755 free(wnick);
2756 if(myfn != NULL)
2757 getfnetnode(sr->fn = myfn);
d86b7a9f 2758 if(hash != NULL)
2759 sr->hash = hash;
d3372da9 2760 submitsrchres(sr);
2761 freesrchres(sr);
2762 }
2763 free(buf);
2764}
2765
2766static void hubread(struct socket *sk, struct fnetnode *fn)
2767{
2768 struct dchub *hub;
2769 char *newbuf;
2770 size_t datalen;
2771 char *p;
2772
2773 hub = (struct dchub *)fn->data;
2774 if((newbuf = sockgetinbuf(sk, &datalen)) == NULL)
2775 return;
2776 if(hub->inbufdata > 500000) /* Discard possible malicious data */
2777 hub->inbufdata = 0;
2778 sizebuf2(hub->inbuf, hub->inbufdata + datalen, 1);
2779 memcpy(hub->inbuf + hub->inbufdata, newbuf, datalen);
2780 free(newbuf);
2781 p = hub->inbuf + hub->inbufdata;
2782 hub->inbufdata += datalen;
2783 while((datalen > 0) && ((p = memchr(p, '|', datalen)) != NULL))
2784 {
2785 *(p++) = 0;
2786 newqcmd(&hub->queue, hub->inbuf);
2787 memmove(hub->inbuf, p, hub->inbufdata -= p - hub->inbuf);
2788 datalen = hub->inbufdata;
2789 p = hub->inbuf;
2790 }
2791}
2792
2793static void huberr(struct socket *sk, int err, struct fnetnode *fn)
2794{
2795 killfnetnode(fn);
2796}
2797
2798static int hubsetnick(struct fnetnode *fn, wchar_t *newnick)
2799{
2800 struct dchub *hub;
2801 char *buf;
2802
2803 hub = fn->data;
2804 if((buf = icwcstombs(newnick, DCCHARSET)) == NULL)
2805 return(1);
2806 if((strchr(buf, ' ') != NULL) || (strchr(buf, '|') != NULL) || (strchr(buf, '$') != NULL))
2807 {
2808 free(buf);
2809 return(1);
2810 }
2811 if(hub == NULL) /* Not yet connected */
2812 {
2813 free(buf);
2814 return(0);
2815 }
2816 if(hub->nativenick != NULL)
2817 free(hub->nativenick);
2818 hub->nativenick = buf;
2819 return(0);
2820}
2821
2822static struct dchub *newdchub(struct fnetnode *fn)
2823{
2824 struct dchub *new;
2825
2826 new = smalloc(sizeof(*new));
2827 memset(new, 0, sizeof(*new));
2828 fn->data = new;
2829 if(hubsetnick(fn, fn->mynick))
2830 fnetsetnick(fn, L"DoldaConnectUser-IN");
2831 /* IN as in Invalid Nick */
2832 return(new);
2833}
2834
2835static struct dcpeer *newdcpeer(struct socket *sk)
2836{
2837 struct dcpeer *new;
2838
2839 new = smalloc(sizeof(*new));
2840 memset(new, 0, sizeof(*new));
2841 new->transfer = NULL;
2842 getsock(sk);
2843 new->sk = sk;
2844 new->next = peers;
2845 new->prev = NULL;
2846 if(peers != NULL)
2847 peers->prev = new;
2848 peers = new;
2849 numdcpeers++;
2850 return(new);
2851}
2852
2853static void freedcpeer(struct dcpeer *peer)
2854{
2855 int i;
2856 struct qcommand *qcmd;
2857
2858 peer->freeing = 1;
2859 if(peers == peer)
2860 peers = peer->next;
2861 if(peer->next != NULL)
2862 peer->next->prev = peer->prev;
2863 if(peer->prev != NULL)
2864 peer->prev->next = peer->next;
2865 if(peer->transfer != NULL)
2866 {
2867 if(peer->transfer->dir == TRNSD_UP)
2868 peer->transfer->close = 1;
2869 if(peer->transfer->dir == TRNSD_DOWN)
2870 resettransfer(peer->transfer);
2871 transferdetach(peer->transfer);
2872 }
2873 if(peer->sk->data == peer)
2874 peer->sk->data = NULL;
2875 peer->sk->readcb = NULL;
2876 peer->sk->writecb = NULL;
2877 peer->sk->errcb = NULL;
2878 putsock(peer->sk);
2879 endcompress(peer);
2880 if(peer->supports != NULL)
2881 {
2882 for(i = 0; peer->supports[i] != NULL; i++)
2883 free(peer->supports[i]);
2884 free(peer->supports);
2885 }
d3372da9 2886 if(peer->inbuf != NULL)
2887 free(peer->inbuf);
2888 if(peer->key != NULL)
2889 free(peer->key);
2890 if(peer->wcsname != NULL)
2891 free(peer->wcsname);
2892 if(peer->nativename != NULL)
2893 free(peer->nativename);
2894 if(peer->fn != NULL)
2895 putfnetnode(peer->fn);
2896 while((qcmd = ulqcmd(&peer->queue)) != NULL)
2897 freeqcmd(qcmd);
2898 free(peer);
2899 numdcpeers--;
2900}
2901
2902static void hubconnect(struct fnetnode *fn)
2903{
2904 fn->sk->readcb = (void (*)(struct socket *, void *))hubread;
2905 fn->sk->errcb = (void (*)(struct socket *, int, void *))huberr;
2906 getfnetnode(fn);
2907 fn->data = newdchub(fn);
2908 fn->sk->data = fn;
2909 return;
2910}
2911
2912static void hubdestroy(struct fnetnode *fn)
2913{
2914 struct dchub *hub;
2915 struct qcommand *qcmd;
2916
2917 hub = (struct dchub *)fn->data;
2918 if(fn->sk != NULL)
2919 {
2920 if(fn->sk->data == fn)
2921 {
2922 fn->sk->data = NULL;
2923 putfnetnode(fn);
2924 }
2925 }
2926 if(hub == NULL)
2927 return;
2928 while((qcmd = ulqcmd(&hub->queue)) != NULL)
2929 freeqcmd(qcmd);
2930 if(hub->nativename != NULL)
2931 free(hub->nativename);
2932 if(hub->nativenick != NULL)
2933 free(hub->nativenick);
2934 if(hub->inbuf != NULL)
2935 free(hub->inbuf);
2936 free(hub);
2937}
2938
2939static wchar_t *dcbasename(wchar_t *filename)
2940{
2941 wchar_t *ret;
2942
2943 if((ret = wcsrchr(filename, L'\\')) != NULL)
2944 return(ret + 1);
2945 return(filename);
2946}
2947
2948static struct transferiface dctransfer =
2949{
2950 .detach = (void (*)(struct transfer *, void *))dctransdetach,
2951 .gotdata = (void (*)(struct transfer *, void *))dctransgotdata,
2952 .endofdata = (void (*)(struct transfer *, void *))dctransendofdata,
2953 .wantdata = (void (*)(struct transfer *, void *))dcwantdata
2954};
2955
2956static struct fnet dcnet =
2957{
2958 .name = L"dc",
2959 .connect = hubconnect,
2960 .destroy = hubdestroy,
2961 .setnick = hubsetnick,
2962 .reqconn = hubreqconn,
2963 .sendchat = hubsendchat,
2964 .search = hubsearch,
2965 .filebasename = dcbasename
2966};
2967
2968static void peerread(struct socket *sk, struct dcpeer *peer)
2969{
2970 char *newbuf, *p;
2971 size_t datalen;
9a2d6cb8 2972 struct command *cmd;
d3372da9 2973
2974 if((newbuf = sockgetinbuf(sk, &datalen)) == NULL)
2975 return;
2976 sizebuf2(peer->inbuf, peer->inbufdata + datalen, 1);
2977 memcpy(peer->inbuf + peer->inbufdata, newbuf, datalen);
2978 free(newbuf);
d3372da9 2979 peer->inbufdata += datalen;
9a2d6cb8 2980 if(peer->state == PEER_CMD)
d3372da9 2981 {
d3372da9 2982 p = peer->inbuf;
9a2d6cb8 2983 while((peer->inbufdata > 0) && (p = memchr(peer->inbuf, '|', peer->inbufdata)) != NULL)
2984 {
2985 *(p++) = 0;
2986 newqcmd(&peer->queue, peer->inbuf);
2987 for(cmd = peercmds; cmd->handler != NULL; cmd++)
2988 {
5eee9d66 2989 if(!memcmp(peer->inbuf, cmd->name, strlen(cmd->name)) && ((peer->inbuf[strlen(cmd->name)] == ' ') || (peer->inbuf[strlen(cmd->name)] == '|')))
9a2d6cb8 2990 break;
2991 }
5eee9d66 2992 memmove(peer->inbuf, p, peer->inbufdata -= p - peer->inbuf);
9a2d6cb8 2993 if(cmd->stop)
2994 {
2995 peer->state = PEER_STOP;
2996 break;
2997 }
9a2d6cb8 2998 }
2999 } else if(peer->state == PEER_TTHL) {
3000 handletthl(peer);
d3372da9 3001 }
3002}
3003
3004static void peererror(struct socket *sk, int err, struct dcpeer *peer)
3005{
3006 freedcpeer(peer);
3007}
3008
3009static void peerconnect(struct socket *sk, int err, struct fnetnode *fn)
3010{
3011 struct dcpeer *peer;
3012
3013 if(err != 0)
3014 {
3015 putfnetnode(fn);
3016 return;
3017 }
3018 peer = newdcpeer(sk);
3019 peer->fn = fn;
3020 peer->accepted = 0;
3021 sk->readcb = (void (*)(struct socket *, void *))peerread;
3022 sk->errcb = (void (*)(struct socket *, int, void *))peererror;
3023 sk->data = peer;
3024 socksettos(sk, confgetint("fnet", "fnptos"));
d3372da9 3025 putsock(sk);
9a2d6cb8 3026 sendmynick(peer);
3027 sendpeerlock(peer);
d3372da9 3028}
3029
3030static void peeraccept(struct socket *sk, struct socket *newsk, void *data)
3031{
3032 struct dcpeer *peer;
3033
3034 peer = newdcpeer(newsk);
3035 peer->accepted = 1;
3036 newsk->readcb = (void (*)(struct socket *, void *))peerread;
3037 newsk->errcb = (void (*)(struct socket *, int, void *))peererror;
3038 newsk->data = peer;
3039 socksettos(newsk, confgetint("fnet", "fnptos"));
d3372da9 3040}
3041
3042static void updatehmlist(void)
3043{
3044 int i, lev, ic, ret;
3045 struct sharecache *node;
3046 char *buf, *buf2, numbuf[32];
3047 size_t bufsize, bufdata;
3048 int fd, ibuf;
3049
3050 bufdata = 0;
3051 buf = smalloc(bufsize = 65536);
3052 node = shareroot->child;
3053 lev = 0;
3054 while(1)
3055 {
3056 ic = 0;
3057 if((buf2 = icwcstombs(node->name, DCCHARSET)) != NULL)
3058 {
3059 for(i = 0; i < lev; i++)
3060 addtobuf(buf, 9);
3061 bufcat(buf, buf2, strlen(buf2));
3062 free(buf2);
3063 if(node->f.b.type == FILE_REG)
3064 {
3065 addtobuf(buf, '|');
3066 sprintf(numbuf, "%i", node->size);
3067 bufcat(buf, numbuf, strlen(numbuf));
3068 }
3069 addtobuf(buf, 13);
3070 addtobuf(buf, 10);
3071 } else {
3072 ic = 1;
3073 }
3074 if((node->child != NULL) && !ic)
3075 {
3076 lev++;
3077 node = node->child;
3078 } else if(node->next != NULL) {
3079 node = node->next;
3080 } else {
3081 while(node->next == NULL)
3082 {
3083 lev--;
3084 node = node->parent;
3085 if(node == shareroot)
3086 break;
3087 }
3088 if(node == shareroot)
3089 break;
3090 node = node->next;
3091 }
3092 }
3093 if(hmlistname != NULL)
3094 {
3095 unlink(hmlistname);
3096 free(hmlistname);
3097 }
3098 hmlistname = sstrdup("/tmp/dc-filelist-hm-XXXXXX");
3099 if((fd = mkstemp(hmlistname)) < 0)
3100 {
3101 flog(LOG_WARNING, "could not create HM file list tempfile: %s", strerror(errno));
3102 free(hmlistname);
3103 hmlistname = NULL;
3104 } else {
3105 /*
3106 * I do not want to implement a good Huffman encoder, and it's not
3107 * like Huffman encoding actually yields any impressive results
3108 * for DC file lists anyway, so I'll just output a bogus
3109 * tree. Implement a good encoder if you want to.
3110 */
3111 write(fd, "HE3\r\0", 5);
3112 write(fd, &bufdata, 4);
3113 ibuf = 256;
3114 write(fd, &ibuf, 2);
3115 ibuf = 8;
3116 for(i = 0; i < 256; i++)
3117 {
3118 write(fd, &i, 1);
3119 write(fd, &ibuf, 1);
3120 }
3121 for(i = 0; i < 256; i++)
3122 write(fd, &i, 1);
3123 for(buf2 = buf; bufdata > 0;)
3124 {
3125 if((ret = write(fd, buf2, bufdata)) < 0)
3126 {
3127 flog(LOG_WARNING, "could not write file list: %s", strerror(errno));
3128 break;
3129 }
3130 bufdata -= ret;
3131 buf2 += ret;
3132 }
3133 close(fd);
3134 }
3135 free(buf);
3136}
3137
3138static struct xmlent
3139{
3140 wchar_t c;
3141 wchar_t *ent;
3142} entities[] = {
3143 {L'&', L"&amp;"},
3144 {L'\"', L"&#34;"},
3145/* {L'\'', L"&quot;"}, Emulate DC++ escaping by omitting this. */
3146 {L'\0', NULL}
3147};
3148
3149static wchar_t *escapexml(wchar_t *src)
3150{
3151 static wchar_t *buf = NULL;;
3152 int ret, c;
3153 wchar_t nbuf[32];
3154 size_t bufsize, bufdata;
3155 struct xmlent *ent;
3156
3157 if(buf != NULL)
3158 free(buf);
3159 buf = NULL;
3160 bufsize = bufdata = 0;
3161 for(; *src != L'\0'; src++)
3162 {
3163 c = wctob(*src);
3164 if((c > 0) && (c < 32))
3165 {
3166 bufcat(buf, L"&#", 2);
3167 ret = swprintf(nbuf, (sizeof(nbuf) / sizeof(*nbuf)), L"%i", c);
3168 bufcat(buf, nbuf, ret);
3169 addtobuf(buf, L';');
3170 } else {
3171 for(ent = entities; ent->ent != NULL; ent++)
3172 {
3173 if(ent->c == *src)
3174 {
3175 bufcat(buf, ent->ent, wcslen(ent->ent));
3176 break;
3177 }
3178 }
3179 if(ent->ent == NULL)
3180 addtobuf(buf, *src);
3181 }
3182 }
3183 addtobuf(buf, L'\0');
3184 return(buf);
3185}
3186
3187static void updatexmllist(void)
3188{
3189 int i, fd, lev;
3190 FILE *fs;
3191 char cidbuf[14], *namebuf;
3192 char *hashbuf;
3193 struct sharecache *node;
3194
3195 if(xmllistname != NULL)
3196 {
3197 unlink(xmllistname);
3198 free(xmllistname);
3199 }
3200 xmllistname = sstrdup("/tmp/dc-filelist-dcxml-XXXXXX");
3201 if((fd = mkstemp(xmllistname)) < 0)
3202 {
3203 flog(LOG_WARNING, "could not create XML file list tempfile: %s", strerror(errno));
3204 free(xmllistname);
3205 xmllistname = NULL;
3206 return;
3207 }
3208 if((fs = fdopen(fd, "w")) == NULL)
3209 {
3210 flog(LOG_WARNING, "could not fdopen XML list fd %i: %s", fd, strerror(errno));
3211 unlink(xmllistname);
3212 free(xmllistname);
3213 xmllistname = NULL;
3214 close(fd);
3215 return;
3216 }
3217 fprintf(fs, "<?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"yes\"?>\r\n");
3218 for(i = 0; i < sizeof(cidbuf) - 1; i++)
3219 cidbuf[i] = (rand() % ('Z' - 'A' + 1)) + 'A';
3220 cidbuf[i] = 0;
3221 fprintf(fs, "<FileListing Version=\"1\" CID=\"%s\" Base=\"/\" Generator=\"%s\">\r\n", cidbuf, DCIDFULL);
3222
3223 node = shareroot->child;
3224 lev = 0;
3225 while(1)
3226 {
3227 if((namebuf = icswcstombs(escapexml(node->name), "UTF-8", NULL)) != NULL)
3228 {
3229 for(i = 0; i < lev; i++)
3230 fputc('\t', fs);
3231 if(node->child != NULL)
3232 {
3233 fprintf(fs, "<Directory Name=\"%s\">\r\n", namebuf);
3234 node = node->child;
3235 lev++;
3236 continue;
3237 } else {
3238 fprintf(fs, "<File Name=\"%s\" Size=\"%i\"", namebuf, node->size);
3239 if(node->f.b.hastth)
3240 {
3241 hashbuf = base32encode(node->hashtth, 24);
3242 fprintf(fs, " TTH=\"%.39s\"", hashbuf);
3243 free(hashbuf);
3244 }
3245 fprintf(fs, "/>\r\n");
3246 }
3247 while(node->next == NULL)
3248 {
3249 node = node->parent;
3250 if(node == shareroot)
3251 {
3252 break;
3253 } else {
3254 lev--;
3255 for(i = 0; i < lev; i++)
3256 fputc('\t', fs);
3257 fprintf(fs, "</Directory>\r\n");
3258 }
3259 }
3260 if(node == shareroot)
3261 break;
3262 node = node->next;
3263 }
3264 }
3265
3266#ifdef DCPP_MASQUERADE
3267 fprintf(fs, "</FileListing>");
3268#else
3269 fprintf(fs, "</FileListing>\r\n");
3270#endif
3271 fclose(fs);
3272}
3273
3274static void updatexmlbz2list(void)
3275{
3276 int err, fd;
3277 FILE *in;
3278 FILE *real;
3279 BZFILE *out;
3280 char buf[1024];
3281 size_t bufdata;
3282
3283 if(xmllistname == NULL)
3284 return;
3285 if((in = fopen(xmllistname, "r")) == NULL)
3286 {
3287 flog(LOG_WARNING, "could not open XML file list for bzipping: %s", strerror(errno));
3288 return;
3289 }
3290 if(xmlbz2listname != NULL)
3291 {
3292 unlink(xmlbz2listname);
3293 free(xmlbz2listname);
3294 }
3295 xmlbz2listname = sstrdup("/tmp/dc-filelist-dcxmlbz2-XXXXXX");
3296 if((fd = mkstemp(xmlbz2listname)) < 0)
3297 {
3298 flog(LOG_WARNING, "could not create bzipped XML file list tempfile: %s", strerror(errno));
3299 free(xmlbz2listname);
3300 xmlbz2listname = NULL;
3301 fclose(in);
3302 return;
3303 }
3304 if((real = fdopen(fd, "w")) == NULL)
3305 {
3306 flog(LOG_WARNING, "could not fdopen bzipped XML list fd %i: %s", fd, strerror(errno));
3307 close(fd);
3308 unlink(xmlbz2listname);
3309 free(xmlbz2listname);
3310 xmlbz2listname = NULL;
3311 fclose(in);
3312 return;
3313 }
3314 out = BZ2_bzWriteOpen(&err, real, 9, 0, 0);
3315 if(err != BZ_OK)
3316 {
3317 flog(LOG_WARNING, "could not open bzip2 stream from XML list");
3318 fclose(real);
3319 unlink(xmlbz2listname);
3320 free(xmlbz2listname);
3321 xmlbz2listname = NULL;
3322 fclose(in);
3323 return;
3324 }
3325 while(!feof(in))
3326 {
3327 bufdata = fread(buf, 1, sizeof(buf), in);
3328 BZ2_bzWrite(&err, out, buf, bufdata);
3329 }
3330 fclose(in);
3331 BZ2_bzWriteClose(&err, out, 0, NULL, NULL);
3332 fclose(real);
3333}
3334
3335static int shareupdate(unsigned long long uusharesize, void *data)
3336{
3337 updatehmlist();
3338 updatexmllist();
3339 updatexmlbz2list();
3340 return(0);
3341}
3342
3343static void dispatchcommand(struct qcommand *qcmd, struct command *cmdlist, struct socket *sk, void *data)
3344{
3345 char *p;
3346 struct command *cmd;
3347
3348 if((p = strchr(qcmd->string, ' ')) != NULL)
3349 *(p++) = 0;
3350 for(cmd = cmdlist; cmd->handler != NULL; cmd++)
3351 {
3352 if(!strcmp(cmd->name, qcmd->string))
3353 break;
3354 }
3355 if(cmd->handler != NULL)
3356 cmd->handler(sk, data, qcmd->string, p);
3357/*
3358 else
3359 flog(LOG_DEBUG, "Unimplemented DC command: %s \"%s\"", qcmd->string, p?p:"noargs");
3360*/
3361}
3362
3363static int run(void)
3364{
3365 struct fnetnode *fn, *nextfn;
3366 struct dchub *hub;
3367 struct dcpeer *peer, *nextpeer;
3368 struct qcommand *qcmd;
3369 int ret;
3370
3371 ret = 0;
3372 for(fn = fnetnodes; fn != NULL; fn = nextfn)
3373 {
3374 nextfn = fn->next;
3375 if(fn->fnet != &dcnet)
3376 continue;
3377 if(fn->data == NULL)
3378 continue;
3379 hub = (struct dchub *)fn->data;
3380 if((qcmd = ulqcmd(&hub->queue)) != NULL)
3381 {
3382 if(*qcmd->string == '$')
3383 {
3384 if((fn->sk != NULL) && (fn->sk->state == SOCK_EST))
3385 dispatchcommand(qcmd, hubcmds, fn->sk, fn);
3386 } else if(*qcmd->string != 0) {
3387 hubrecvchat(fn->sk, fn, NULL, qcmd->string);
3388 }
3389 freeqcmd(qcmd);
3390 ret = 1;
3391 break;
3392 }
3393 }
3394 for(peer = peers; peer != NULL; peer = nextpeer)
3395 {
3396 nextpeer = peer->next;
3397 if((qcmd = ulqcmd(&peer->queue)) != NULL)
3398 {
3399 if(*qcmd->string == '$')
3400 dispatchcommand(qcmd, peercmds, peer->sk, peer);
3401 freeqcmd(qcmd);
3402 ret = 1;
3403 break;
3404 }
3405 }
3406 return(ret);
3407}
3408
3409static void preinit(int hup)
3410{
3411 if(hup)
3412 return;
3413 regfnet(&dcnet);
3414}
3415
3416static int updateudpport(struct configvar *var, void *uudata)
3417{
3418 struct sockaddr_in addr;
3419 struct socket *newsock;
3420
3421 memset(&addr, 0, sizeof(addr));
3422 addr.sin_family = AF_INET;
3423 addr.sin_port = htons(var->val.num);
3424 if((newsock = netcsdgram((struct sockaddr *)&addr, sizeof(addr))) == NULL)
3425 {
3426 flog(LOG_WARNING, "could not create new DC UDP socket, reverting to old: %s", strerror(errno));
3427 return(0);
3428 }
3429 newsock->readcb = udpread;
3430 if(udpsock != NULL)
3431 putsock(udpsock);
3432 udpsock = newsock;
3433 return(0);
3434}
3435
3436static int updatetcpport(struct configvar *var, void *uudata)
3437{
3438 struct sockaddr_in addr;
3439 struct socket *newsock;
3440
3441 memset(&addr, 0, sizeof(addr));
3442 addr.sin_family = AF_INET;
3443 addr.sin_port = htons(var->val.num);
3444 if((newsock = netcslisten(SOCK_STREAM, (struct sockaddr *)&addr, sizeof(addr), peeraccept, NULL)) == NULL)
3445 flog(LOG_INFO, "could not listen to a remote address, going into passive mode");
3446 if(tcpsock != NULL)
3447 putsock(tcpsock);
3448 tcpsock = newsock;
3449 return(0);
3450}
3451
3452static int init(int hup)
3453{
3454 struct sockaddr_in addr;
3455
3456 if(!hup)
3457 {
3458 GCBREG(sharechangecb, shareupdate, NULL);
3459 if(udpsock != NULL)
3460 putsock(udpsock);
3461 if(tcpsock != NULL)
3462 putsock(tcpsock);
3463 addr.sin_family = AF_INET;
3464 memset(&addr.sin_addr, 0, sizeof(addr.sin_addr));
3465 addr.sin_port = htons(confgetint("dc", "udpport"));
3466 if((udpsock = netcsdgram((struct sockaddr *)&addr, sizeof(addr))) == NULL)
3467 {
3468 flog(LOG_CRIT, "could not create DC UDP socket: %s", strerror(errno));
3469 return(1);
3470 }
3471 udpsock->readcb = udpread;
3472 addr.sin_port = htons(confgetint("dc", "tcpport"));
3473 if((tcpsock = netcslisten(SOCK_STREAM, (struct sockaddr *)&addr, sizeof(addr), peeraccept, NULL)) == NULL)
3474 flog(LOG_INFO, "could not listen to a remote address, going into passive mode");
3475 CBREG(confgetvar("dc", "udpport"), conf_update, updateudpport, NULL, NULL);
3476 CBREG(confgetvar("dc", "tcpport"), conf_update, updatetcpport, NULL, NULL);
3477 CBREG(confgetvar("net", "mode"), conf_update, updatetcpport, NULL, NULL);
3478 }
3479 return(0);
3480}
3481
3482static void terminate(void)
3483{
3484 if(hmlistname != NULL)
3485 {
3486 unlink(hmlistname);
3487 free(hmlistname);
3488 }
3489 if(xmllistname != NULL)
3490 {
3491 unlink(xmllistname);
3492 free(xmllistname);
3493 }
3494 if(xmlbz2listname != NULL)
3495 {
3496 unlink(xmlbz2listname);
3497 free(xmlbz2listname);
3498 }
3499}
3500
3501static struct configvar myvars[] =
3502{
3503 {CONF_VAR_STRING, "desc", {.str = L""}},
3504 {CONF_VAR_STRING, "speedstring", {.str = L"LAN(T1)"}},
3505 {CONF_VAR_STRING, "email", {.str = L"spam@spam.org"}},
3506 {CONF_VAR_INT, "udpport", {.num = 0}},
3507 {CONF_VAR_INT, "tcpport", {.num = 0}},
3508 {CONF_VAR_END}
3509};
3510
3511static struct module me =
3512{
3513 .conf =
3514 {
3515 .vars = myvars
3516 },
3517 .preinit = preinit,
3518 .init = init,
3519 .run = run,
3520 .terminate = terminate,
3521 .name = "dc"
3522};
3523
3524MODULE(me)
Dolda Connect