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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;
c9b3ad74 109 int extended, isop;
d3372da9 110 char *nativename;
111 char *nativenick;
112};
113
114struct dcexppeer
115{
116 struct dcexppeer *next, *prev;
117 char *nick;
118 struct fnetnode *fn;
119 struct timer *expire;
120};
121
122struct dcpeer
123{
124 struct dcpeer *next, *prev;
125 struct socket *sk;
126 struct fnetnode *fn;
127 char *inbuf;
128 size_t inbufdata, inbufsize;
9a2d6cb8 129 size_t curread, totalsize;
d3372da9 130 int freeing;
131 struct qcommand *queue;
132 struct transfer *transfer;
133 int state;
134 int ptclose; /* Close after transfer is complete */
135 int accepted; /* If false, we connected, otherwise, we accepted */
136 int extended;
137 int direction; /* Using the constants from transfer.h */
138 int compress;
9a2d6cb8 139 int hascurpos, notthl;
140 struct tigertreehash tth;
d3372da9 141 void *cprsdata;
d3372da9 142 char *key;
143 char *nativename;
144 char **supports;
145 wchar_t *wcsname;
146};
147
148static struct fnet dcnet;
149static struct transferiface dctransfer;
150static struct socket *udpsock = NULL;
151static struct socket *tcpsock = NULL;
152static struct dcpeer *peers = NULL;
153int numdcpeers = 0;
154static struct dcexppeer *expected = NULL;
155static char *hmlistname = NULL;
156static char *xmllistname = NULL;
157static char *xmlbz2listname = NULL;
158
159static void peerconnect(struct socket *sk, int err, struct fnetnode *fn);
160static void freedcpeer(struct dcpeer *peer);
161static void transread(struct socket *sk, struct dcpeer *peer);
162static void transerr(struct socket *sk, int err, struct dcpeer *peer);
163static void transwrite(struct socket *sk, struct dcpeer *peer);
164static void updatehmlist(void);
165static void updatexmllist(void);
166static void updatexmlbz2list(void);
9a2d6cb8 167static void requestfile(struct dcpeer *peer);
d3372da9 168
169static int reservedchar(unsigned char c)
170{
171 return((c == 0) || (c == 5) || (c == 124) || (c == 96) || (c == 126) || (c == 36));
172}
173
174/* Oh, how I despise having to do this... */
175static char *dcmakekey(char *lock)
176{
177 int i, len, offset;
178 char *buf, *key;
179 char save;
180
181 buf = smalloc(strlen(lock));
182 save = 5;
183 len = 0;
184 for(i = 0; lock[i]; i++)
185 {
186 buf[i] = lock[i] ^ save;
187 buf[i] = ((buf[i] & 0x0F) << 4) | ((buf[i] & 0xF0) >> 4);
188 save = lock[i];
189 if((i != 0) && reservedchar(buf[i]))
190 len += 10;
191 else
192 len++;
193 }
194 buf[0] ^= buf[i - 1];
195 if(reservedchar(buf[0]))
196 len += 10;
197 else
198 len++;
199 key = smalloc(len + 1);
200 offset = 0;
201 for(i = 0; lock[i] != 0; i++)
202 {
203 if(reservedchar(buf[i]))
204 offset += sprintf(key + offset, "/%%DCN%03i%%/", buf[i]);
205 else
206 key[offset++] = buf[i];
207 }
208 key[offset] = 0;
209 free(buf);
210 return(key);
211}
212
9a2d6cb8 213static char *pathnmdc2adc(char *path)
214{
215 char *ret;
216 size_t retsize, retdata;
217
218 if(!strcmp(path, "files.xml") || !strcmp(path, "files.xml.bz2") || !strcmp(path, "MyList.DcLst"))
219 return(sstrdup(path));
220 ret = NULL;
221 retsize = retdata = 0;
222 addtobuf(ret, '/');
223 for(; *path; path++)
224 {
225 if(*path == '\\')
226 addtobuf(ret, '/');
227 else
228 addtobuf(ret, *path);
229 }
230 addtobuf(ret, 0);
231 return(ret);
232}
233
234static int isdchash(struct hash *hash)
235{
236 if(wcscmp(hash->algo, L"TTH"))
237 return(0);
238 if(hash->len != 24)
239 return(0);
240 return(1);
241}
242
243static int supports(struct dcpeer *peer, char *cap)
244{
245 char **p;
246
247 if(peer->supports == NULL)
248 return(0);
249 for(p = peer->supports; *p != NULL; p++)
250 {
251 if(!strcasecmp(*p, cap))
252 return(1);
253 }
254 return(0);
255}
256
d3372da9 257static void endcompress(struct dcpeer *peer)
258{
259 if(peer->compress == CPRS_ZLIB)
260 {
261 deflateEnd(peer->cprsdata);
262 free(peer->cprsdata);
263 }
264 peer->compress = CPRS_NONE;
265}
266
267static void initcompress(struct dcpeer *peer, int algo)
268{
269 int ret;
270
271 endcompress(peer);
272 peer->compress = algo;
273 if(algo == CPRS_ZLIB)
274 {
275 peer->cprsdata = smalloc(sizeof(z_stream));
276 memset(peer->cprsdata, 0, sizeof(z_stream));
277 if((ret = deflateInit(peer->cprsdata, 3)) != Z_OK)
278 {
279 flog(LOG_CRIT, "Aiya! zlib refuses to init (%i)!", ret);
280 abort();
281 }
282 }
283}
284
285static void unquote(wchar_t *in)
286{
287 wchar_t *p, *p2, nc;
288
289 for(p = in; *p != L'\0'; p++)
290 {
291 if(*p == L'&')
292 {
293 for(p2 = p + 1; (*p2 != L'\0') && (*p2 != L';') && (*p2 != L'&'); p2++);
294 if(*p2 == L'&')
295 continue;
296 if(*p2 == L'\0')
297 return;
298 *p2 = L'\0';
299 nc = L'\0';
300 if(!wcscmp(p + 1, L"amp"))
301 {
302 nc = L'&';
303 } else if(p[1] == L'#') {
304 nc = ucptowc(wcstol(p + 2, NULL, 10));
305 }
306 if(nc == L'\0')
307 {
308 *p2 = L';';
309 p = p2;
310 continue;
311 }
312 *p = nc;
313 memmove(p + 1, p2 + 1, (wcslen(p2 + 1) + 1) * sizeof(wchar_t));
314 }
315 }
316}
317
318static void freeexppeer(struct dcexppeer *ep)
319{
320 if(ep->next != NULL)
321 ep->next->prev = ep->prev;
322 if(ep->prev != NULL)
323 ep->prev->next = ep->next;
324 if(ep == expected)
325 expected = ep->next;
326 free(ep->nick);
327 putfnetnode(ep->fn);
328 if(ep->expire != NULL)
329 canceltimer(ep->expire);
330 free(ep);
331}
332
333static void exppeerexpire(int cancelled, struct dcexppeer *ep)
334{
335 ep->expire = NULL;
336 if(!cancelled)
337 freeexppeer(ep);
338}
339
340static struct dcexppeer *expectpeer(char *nick, struct fnetnode *fn)
341{
342 struct dcexppeer *ep;
343
344 ep = smalloc(sizeof(*ep));
345 ep->nick = sstrdup(nick);
346 getfnetnode(ep->fn = fn);
347 ep->expire = timercallback(ntime() + 300, (void (*)(int, void *))exppeerexpire, ep);
348 ep->next = expected;
349 ep->prev = NULL;
350 if(expected != NULL)
351 expected->prev = ep;
352 expected = ep;
353 return(ep);
354}
355
356static struct qcommand *newqcmd(struct qcommand **queue, char *string)
357{
358 struct qcommand *new;
359
360 while(*queue != NULL)
361 queue = &(*queue)->next;
362 new = smalloc(sizeof(*new));
363 new->string = sstrdup(string);
364 new->next = *queue;
365 *queue = new;
366 return(new);
367}
368
369static struct qcommand *ulqcmd(struct qcommand **queue)
370{
371 struct qcommand *qcmd;
372
373 if((qcmd = *queue) == NULL)
374 return(NULL);
375 *queue = qcmd->next;
376 return(qcmd);
377}
378
379static void freeqcmd(struct qcommand *qcmd)
380{
381 free(qcmd->string);
382 free(qcmd);
383}
384
385static void hubrecvchat(struct socket *sk, struct fnetnode *fn, char *from, char *string)
386{
387 wchar_t *chat, *wfrom, *wpeer;
388 char *p, *end;
389 struct fnetpeer *peer;
390
391 end = string + strlen(string);
392 while((p = strchr(string, 13)) != NULL)
393 memmove(p, p + 1, (end-- - p));
394 if(from != NULL)
395 {
396 if((strlen(string) > strlen(from) + 2) && (*string == '<') && !memcmp(string + 1, from, strlen(from)) && (*(string + strlen(from) + 1) == '>'))
397 string += strlen(from) + 2;
398 if((wfrom = icmbstowcs(from, DCCHARSET)) == NULL)
399 return;
400 wpeer = swcsdup(wfrom);
401 } else {
402 wfrom = NULL;
403 wpeer = NULL;
404 if(*string == '<')
405 {
406 for(p = string + 1; *p; p++)
407 {
408 if((*p == ' ') || (*p == '>'))
409 break;
410 }
411 if(*p == '>')
412 {
413 *(p++) = 0;
414 if(*p == ' ')
415 p++;
416 if((wpeer = icmbstowcs(string + 1, DCCHARSET)) == NULL)
417 return;
418 string = p;
419 }
420 }
421 if(wpeer == NULL)
422 wpeer = swcsdup(L"");
423 }
424 if((chat = icmbstowcs(string, DCCHARSET)) == NULL)
425 {
426 if(wfrom != NULL)
427 free(wfrom);
428 free(wpeer);
429 return;
430 }
431 unquote(chat);
432 if(wfrom != NULL)
433 {
434 if((peer = fnetfindpeer(fn, wfrom)) == NULL) /* Assume public chat */
435 fnethandlechat(fn, 1, wfrom, wpeer, chat);
436 else
437 fnethandlechat(fn, 0, wfrom, wpeer, chat);
438 } else {
439 fnethandlechat(fn, 1, L"", wpeer, chat);
440 }
441 if(wfrom != NULL)
442 free(wfrom);
443 free(wpeer);
444 free(chat);
445}
446
447static void sendadc(struct socket *sk, char *arg)
448{
449 char *buf;
450 size_t bufsize, bufdata;
451
452 buf = NULL;
453 bufsize = bufdata = 0;
454 addtobuf(buf, ' ');
455 for(; *arg; arg++)
456 {
457 if(*arg == ' ')
458 {
459 bufcat(buf, "\\s", 2);
460 } else if(*arg == '\n') {
461 bufcat(buf, "\\n", 2);
462 } else if(*arg == '\\') {
463 bufcat(buf, "\\\\", 2);
464 } else {
465 addtobuf(buf, *arg);
466 }
467 }
468 sockqueue(sk, buf, bufdata);
469 free(buf);
470}
471
472static void sendadcf(struct socket *sk, char *arg, ...)
473{
474 char *buf;
475 va_list args;
476
477 va_start(args, arg);
478 buf = vsprintf2(arg, args);
479 va_end(args);
480 if(buf == NULL)
481 return;
482 sendadc(sk, buf);
483 free(buf);
484}
485
486static char **parseadc(char *args)
487{
488 char **retbuf;
489 size_t retbufsize, retbufdata;
490 char *buf;
491 size_t bufsize, bufdata;
492 int state;
493
494 retbuf = NULL;
495 buf = NULL;
496 retbufsize = retbufdata = bufsize = bufdata = 0;
497 state = 0;
498 while(state != 3)
499 {
500 switch(state)
501 {
502 case 0:
503 if(*args == 0)
504 state = 3;
505 else if(*args != ' ')
506 state = 1;
507 break;
508 case 1:
509 if((*args == ' ') || (*args == 0))
510 {
511 addtobuf(buf, 0);
512 addtobuf(retbuf, buf);
513 buf = NULL;
514 bufsize = bufdata = 0;
515 if(*args == 0)
516 state = 3;
517 } else if(*args == '\\') {
518 state = 2;
519 } else {
520 addtobuf(buf, *args);
521 }
522 args++;
523 break;
524 case 2:
525 if(*args == 0)
526 {
527 if(buf != NULL)
528 free(buf);
529 addtobuf(retbuf, NULL);
530 freeparr(retbuf);
531 return(NULL);
f24d5cfb 532 } else if((*args == 's') || (*args == ' ')) {
d3372da9 533 addtobuf(buf, ' ');
534 } else if(*args == 'n') {
535 addtobuf(buf, '\n');
536 } else if(*args == '\\') {
537 addtobuf(buf, '\\');
538 }
a478552c 539 args++;
d3372da9 540 state = 1;
a478552c 541 break;
d3372da9 542 }
543 }
544 if(buf != NULL)
545 free(buf);
546 addtobuf(retbuf, NULL);
547 return(retbuf);
548}
549
550/* Macros useful in command handlers */
551#define skipspace(s) ({if(((s) = strchr((s), ' ')) == NULL) return; else (s)++;})
552#define qstr(sk, str) sockqueue(sk, str, strlen(str))
553#define qstrf(sk, strandargs...) \
554do { \
555 char *__buf__; \
556 if((__buf__ = sprintf2(strandargs)) != NULL) { \
557 sockqueue(sk, __buf__, strlen(__buf__)); \
558 free(__buf__); \
559 } \
560} while(0)
561
562static char *tr(char *str, char *trans)
563{
564 char *p;
565
566 for(; *trans; trans += 2)
567 {
568 for(p = strchr(str, trans[0]); p != NULL; p = strchr(p, trans[0]))
569 *p = trans[1];
570 }
571 return(str);
572}
573
9a2d6cb8 574static char *getadcid(struct dcpeer *peer)
575{
576 char *buf;
577 char *ret;
d57f938a 578 int isfilelist;
9a2d6cb8 579
d57f938a 580 if(!wcscmp(peer->transfer->path, L"files.xml") || !wcscmp(peer->transfer->path, L"files.xml.bz2") || !wcscmp(peer->transfer->path, L"MyList.DcLst"))
581 isfilelist = 1;
582 if(!isfilelist && (peer->transfer->hash != NULL) && isdchash(peer->transfer->hash) && supports(peer, "tthf"))
9a2d6cb8 583 {
584 buf = base32encode(peer->transfer->hash->buf, 24);
585 ret = sprintf2("TTH/%.39s", buf);
586 free(buf);
587 } else {
588 if((buf = icwcstombs(peer->transfer->path, "UTF-8")) == NULL)
589 return(NULL);
590 ret = pathnmdc2adc(buf);
591 free(buf);
592 }
593 return(ret);
594}
595
596
d3372da9 597static int trresumecb(struct transfer *transfer, wchar_t *cmd, wchar_t *arg, struct dcpeer *peer)
598{
599 if(!wcscmp(cmd, L"resume"))
600 {
601 if(arg == NULL)
602 {
603 flog(LOG_WARNING, "filter returned no position for \"resume\" on transfer %i", transfer->id);
604 freedcpeer(peer);
605 } else {
606 transfer->curpos = wcstol(arg, NULL, 10);
9a2d6cb8 607 peer->hascurpos = 1;
608 requestfile(peer);
d3372da9 609 }
d3372da9 610 return(1);
611 }
612 return(0);
613}
614
9a2d6cb8 615static void sendmynick(struct dcpeer *peer)
d3372da9 616{
617 struct dchub *hub;
d3372da9 618
9a2d6cb8 619 hub = (peer->fn == NULL)?NULL:(peer->fn->data);
620 if(hub == NULL)
621 qstrf(peer->sk, "$MyNick %s|", icswcstombs(confgetstr("cli", "defnick"), DCCHARSET, "DoldaConnectUser-IN"));
622 else
623 qstrf(peer->sk, "$MyNick %s|", hub->nativenick);
624}
625
626static void sendpeerlock(struct dcpeer *peer)
627{
628#ifdef DCPP_MASQUERADE
629 qstrf(peer->sk, "$Lock EXTENDEDPROTOCOLABCABCABCABCABCABC Pk=DCPLUSPLUS0.674ABCABC|");
630#else
631 qstrf(peer->sk, "$Lock EXTENDEDPROTOCOLABCABCABCABCABCABC Pk=DOLDA%sABCABCABC|", VERSION);
632#endif
633}
634
635static void sendsupports(struct dcpeer *peer)
636{
637#ifdef DCPP_MASQUERADE
638 qstr(peer->sk, "$Supports MiniSlots XmlBZList ADCGet TTHL TTHF GetZBlock ZLIG |");
639#else
640 qstr(peer->sk, "$Supports MiniSlots XmlBZList ADCGet TTHL TTHF GetZBlock ZLIG|");
641#endif
642}
643
644static void requestfile(struct dcpeer *peer)
645{
646 char *buf;
647
648 if(peer->transfer->size == -1)
d3372da9 649 {
9a2d6cb8 650 if((buf = icswcstombs(peer->transfer->path, DCCHARSET, NULL)) == NULL)
d3372da9 651 {
9a2d6cb8 652 transferseterror(peer->transfer, TRNSE_NOTFOUND);
653 freedcpeer(peer);
d3372da9 654 return;
655 }
9a2d6cb8 656 /* The transfer will be restarted later from
657 * cmd_filelength when it detects that the sizes
658 * don't match. */
659 qstrf(peer->sk, "$Get %s$1|", buf);
660 return;
d3372da9 661 }
9a2d6cb8 662 if((peer->transfer->hash == NULL) && !peer->notthl)
d3372da9 663 {
9a2d6cb8 664 if(supports(peer, "adcget") && supports(peer, "tthl"))
d3372da9 665 {
9a2d6cb8 666 qstr(peer->sk, "$ADCGET");
667 sendadc(peer->sk, "tthl");
668 if((buf = getadcid(peer)) == NULL)
d3372da9 669 {
9a2d6cb8 670 transferseterror(peer->transfer, TRNSE_NOTFOUND);
d3372da9 671 freedcpeer(peer);
672 return;
673 }
9a2d6cb8 674 sendadc(peer->sk, buf);
675 free(buf);
676 sendadc(peer->sk, "0");
677 sendadc(peer->sk, "-1");
678 qstr(peer->sk, "|");
679 return;
680 }
681 }
682 if(!peer->hascurpos)
683 {
684 if(forkfilter(peer->transfer))
685 {
686 flog(LOG_WARNING, "could not fork filter for transfer %i: %s", peer->transfer->id, strerror(errno));
687 freedcpeer(peer);
688 return;
d3372da9 689 }
9a2d6cb8 690 CBREG(peer->transfer, trans_filterout, (int (*)(struct transfer *, wchar_t *, wchar_t *, void *))trresumecb, NULL, peer);
691 return;
692 }
693 if(supports(peer, "adcget"))
694 {
695 qstr(peer->sk, "$ADCGET");
696 sendadc(peer->sk, "file");
697 if((buf = getadcid(peer)) == NULL)
698 {
699 transferseterror(peer->transfer, TRNSE_NOTFOUND);
700 freedcpeer(peer);
701 return;
702 }
703 sendadc(peer->sk, buf);
704 free(buf);
705 sendadcf(peer->sk, "%i", peer->transfer->curpos);
706 sendadcf(peer->sk, "%i", peer->transfer->size - peer->transfer->curpos);
707 qstr(peer->sk, "|");
708 } else if(supports(peer, "xmlbzlist")) {
709 if((buf = icswcstombs(peer->transfer->path, "UTF-8", NULL)) == NULL)
710 {
711 transferseterror(peer->transfer, TRNSE_NOTFOUND);
712 freedcpeer(peer);
713 return;
714 }
715 qstrf(peer->sk, "$UGetBlock %i %i %s|", peer->transfer->curpos, peer->transfer->size - peer->transfer->curpos, buf);
d3372da9 716 } else {
9a2d6cb8 717 if((buf = icswcstombs(peer->transfer->path, DCCHARSET, NULL)) == NULL)
d3372da9 718 {
9a2d6cb8 719 transferseterror(peer->transfer, TRNSE_NOTFOUND);
720 freedcpeer(peer);
721 return;
d3372da9 722 }
9a2d6cb8 723 qstrf(peer->sk, "$Get %s$%i|", buf, peer->transfer->curpos + 1);
d3372da9 724 }
725}
726
727static void sendmyinfo(struct socket *sk, struct fnetnode *fn)
728{
729 struct dchub *hub;
730 char *buf;
731 struct fnetnode *cfn;
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
c9b3ad74 1451static void cmd_logedin(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
1452{
1453 struct dchub *hub;
1454
1455 hub = fn->data;
1456 hub->isop = 1;
1457 hubhandleaction(sk, fn, cmd, args);
1458}
1459
d3372da9 1460static void cmd_mynick(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1461{
9a2d6cb8 1462 struct dcexppeer *expect;
1463
d3372da9 1464 if(peer->nativename != NULL)
1465 free(peer->nativename);
1466 peer->nativename = sstrdup(args);
1467 if(peer->wcsname != NULL)
1468 free(peer->wcsname);
1469 if((peer->wcsname = icmbstowcs(peer->nativename, DCCHARSET)) == NULL)
1470 {
1471 freedcpeer(peer);
1472 return;
1473 }
9a2d6cb8 1474 if(peer->accepted)
1475 {
1476 for(expect = expected; expect != NULL; expect = expect->next)
1477 {
1478 if(!strcmp(expect->nick, args))
1479 break;
1480 }
1481 if(expect == NULL)
1482 {
1483 peer->fn = NULL;
1484 } else {
1485 peer->fn = expect->fn;
1486 getfnetnode(peer->fn);
1487 freeexppeer(expect);
1488 }
1489 }
d3372da9 1490}
1491
1492static void cmd_direction(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1493{
1494 char *p;
9a2d6cb8 1495 int mydir;
1496 struct transfer *transfer;
d3372da9 1497
1498 if((p = strchr(args, ' ')) == NULL)
1499 return;
1500 *p = 0;
1501 if(!strcmp(args, "Upload"))
9a2d6cb8 1502 mydir = TRNSD_DOWN;
d3372da9 1503 if(!strcmp(args, "Download"))
9a2d6cb8 1504 mydir = TRNSD_UP;
1505 if(peer->accepted)
1506 {
1507 if((peer->transfer == NULL) || (mydir != peer->direction))
1508 {
1509 freedcpeer(peer);
1510 return;
1511 }
1b14d3d8 1512 if(peer->direction == TRNSD_DOWN)
1513 requestfile(peer);
9a2d6cb8 1514 } else {
1515 if(peer->wcsname == NULL)
1516 {
1517 freedcpeer(peer);
1518 return;
1519 }
1520 peer->direction = mydir;
1521 if(peer->direction == TRNSD_UP)
1522 {
1523 transfer = newupload(peer->fn, &dcnet, peer->wcsname, &dctransfer, peer);
1524 } else {
1525 if((transfer = finddownload(peer->wcsname)) == NULL)
1526 {
1527 freedcpeer(peer);
1528 return;
1529 }
1530 transferattach(transfer, &dctransfer, peer);
1531 transfersetstate(transfer, TRNS_HS);
1532 }
1533 transfersetnick(transfer, peer->wcsname);
1534 peer->transfer = transfer;
1535 if(peer->extended)
1536 sendsupports(peer);
1537 qstrf(sk, "$Direction %s %i|", (peer->direction == TRNSD_UP)?"Upload":"Download", rand() % 10000);
1538 if(peer->key != NULL)
1539 qstrf(sk, "$Key %s|", peer->key);
1540 if(peer->direction == TRNSD_DOWN)
1541 requestfile(peer);
1542 }
d3372da9 1543}
1544
1545static void cmd_peerlock(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1546{
9a2d6cb8 1547 char *p, *key;
1548 struct transfer *transfer;
d3372da9 1549
1550 if((p = strchr(args, ' ')) == NULL)
1551 return;
1552 *p = 0;
1553 if(!strncmp(args, "EXTENDEDPROTOCOL", 16))
1554 peer->extended = 1;
9a2d6cb8 1555 key = dcmakekey(args);
1556 if(peer->accepted)
1557 {
1558 if(peer->wcsname == NULL)
1559 {
1560 freedcpeer(peer);
1561 return;
1562 }
1563 sendmynick(peer);
1564 sendpeerlock(peer);
1565 if(peer->extended)
1566 sendsupports(peer);
1567 if((transfer = finddownload(peer->wcsname)) == NULL)
1568 {
1569 peer->direction = TRNSD_UP;
1570 transfer = newupload(peer->fn, &dcnet, peer->wcsname, &dctransfer, peer);
1571 } else {
1572 peer->direction = TRNSD_DOWN;
1573 transferattach(transfer, &dctransfer, peer);
1574 transfersetstate(transfer, TRNS_HS);
1575 }
1576 transfersetnick(transfer, peer->wcsname);
1577 peer->transfer = transfer;
1578 qstrf(sk, "$Direction %s %i|", (peer->direction == TRNSD_UP)?"Upload":"Download", rand() % 10000);
1579 qstrf(sk, "$Key %s|", key);
1580 } else {
1581 if(peer->key != NULL)
1582 free(peer->key);
1583 peer->key = key;
1584 }
d3372da9 1585}
1586
1587static void cmd_key(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1588{
9a2d6cb8 1589 /* NOP */
1590}
1591
1592static void startdl(struct dcpeer *peer)
1593{
1594 peer->state = PEER_TRNS;
1595 transferstartdl(peer->transfer, peer->sk);
1596 peer->sk->readcb = (void (*)(struct socket *, void *))transread;
1597 peer->sk->errcb = (void (*)(struct socket *, int, void *))transerr;
1598}
1599
1600static void startul(struct dcpeer *peer)
1601{
1602 peer->state = PEER_TRNS;
1603 transferstartul(peer->transfer, peer->sk);
1604 peer->sk->writecb = (void (*)(struct socket *, void *))transwrite;
d3372da9 1605}
1606
1607static void cmd_filelength(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1608{
1609 int size;
1610
1611 if(peer->transfer == NULL)
1612 {
1613 freedcpeer(peer);
1614 return;
1615 }
1616 size = atoi(args);
9a2d6cb8 1617 if(peer->transfer->size != size)
d3372da9 1618 {
d3372da9 1619 transfersetsize(peer->transfer, size);
1620 freedcpeer(peer);
1621 return;
1622 }
9a2d6cb8 1623 startdl(peer);
1624 qstr(peer->sk, "$Send|");
d3372da9 1625}
1626
1627static void cmd_error(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1628{
1629 if((peer->transfer != NULL) && (peer->transfer->dir == TRNSD_DOWN))
1630 {
1631 transferseterror(peer->transfer, TRNSE_NOTFOUND);
1632 resettransfer(peer->transfer);
1633 return;
1634 }
1635 freedcpeer(peer);
1636}
1637
1638static void cmd_maxedout(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1639{
1640 if((peer->transfer != NULL) && (peer->transfer->dir == TRNSD_DOWN))
1641 {
1642 transferseterror(peer->transfer, TRNSE_NOSLOTS);
1643 resettransfer(peer->transfer);
1644 return;
1645 }
1646 freedcpeer(peer);
1647}
1648
1649static struct
1650{
1651 char *name;
1652 char **file;
1653 void (*func)(void);
1654} lists[] =
1655{
1656 {"MyList.DcLst", &hmlistname, updatehmlist},
1657 {"files.xml", &xmllistname, updatexmllist},
1658 {"files.xml.bz2", &xmlbz2listname, updatexmlbz2list},
1659 {NULL, NULL}
1660};
1661
1662static int openfilelist(char *name)
1663{
1664 int i, fd;
1665 int errnobak;
1666
1667 for(i = 0; lists[i].name != NULL; i++)
1668 {
1669 if(!strcmp(name, lists[i].name))
1670 break;
1671 }
1672 errno = 0;
1673 if(lists[i].name == NULL)
1674 return(-1);
1675 fd = -1;
1676 if((*lists[i].file == NULL) || ((fd = open(*lists[i].file, O_RDONLY)) < 0))
1677 lists[i].func();
1678 if((fd < 0) && ((*lists[i].file == NULL) || ((fd = open(*lists[i].file, O_RDONLY)) < 0)))
1679 {
1680 errnobak = errno;
1681 flog(LOG_ERR, "could not open filelist tempfile: %s", strerror(errno));
1682 errno = errnobak;
1683 return(-1);
1684 }
1685 return(fd);
1686}
1687
1688static struct sharecache *findbytth(char *tth32)
1689{
1690 char *buf;
1691 size_t buflen;
1692 struct sharecache *node;
1693
1694 if((buf = base32decode(tth32, &buflen)) == NULL)
1695 return(NULL);
1696 if(buflen != 24)
1697 {
1698 free(buf);
1699 return(NULL);
1700 }
1701 for(node = shareroot->child; node != NULL; node = nextscnode(node))
1702 {
1703 if(node->f.b.hastth && !memcmp(node->hashtth, buf, 24))
1704 break;
1705 }
1706 free(buf);
1707 return(node);
1708}
1709
1710static struct sharecache *resdcpath(char *path, char *charset, char sep)
1711{
1712 struct sharecache *node;
1713 char *p, *p2;
1714
1715 node = shareroot;
1716 p = path;
1717 while(p != NULL)
1718 {
1719 if((p2 = strchr(p, sep)) != NULL)
1720 *(p2++) = 0;
1721 if((node = findcache(node, icsmbstowcs(p, charset, L""))) == NULL)
1722 return(NULL);
1723 p = p2;
1724 }
1725 return(node);
1726}
1727
1728static void cmd_get(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1729{
1730 int offset;
1731 char *p, *buf;
1732 wchar_t *buf2;
1733 struct sharecache *node;
1734 struct socket *lesk;
1735 int fd;
1736 struct stat sb;
1737
1738 if(peer->transfer == NULL)
1739 {
1740 freedcpeer(peer);
1741 return;
1742 }
1743 if((p = strchr(args, '$')) == NULL)
1744 {
1745 freedcpeer(peer);
1746 return;
1747 }
1748 *(p++) = 0;
1749 if((offset = (atoi(p) - 1)) < 0)
1750 {
1751 freedcpeer(peer);
1752 return;
1753 }
1754 if(((fd = openfilelist(args)) < 0) && (errno != 0))
1755 {
1756 qstr(sk, "$Error Could not send file list|");
1757 freedcpeer(peer);
1758 return;
1759 } else if(fd >= 0) {
1760 if((buf2 = icsmbstowcs(args, DCCHARSET, NULL)) != NULL)
1761 transfersetpath(peer->transfer, buf2);
1762 }
1763 if(fd < 0)
1764 {
1765 if(slotsleft() < 1)
1766 {
1767 qstr(sk, "$MaxedOut|");
1768 freedcpeer(peer);
1769 return;
1770 }
1771 if((node = resdcpath(args, DCCHARSET, '\\')) == NULL)
1772 {
1773 qstrf(sk, "$Error File not in share|");
1774 freedcpeer(peer);
1775 return;
1776 }
1777 if((fd = opensharecache(node)) < 0)
1778 {
1779 qstrf(sk, "$Error %s|", strerror(errno));
1780 freedcpeer(peer);
1781 return;
1782 }
1783 buf = getfspath(node);
1784 if((buf2 = icsmbstowcs(buf, NULL, NULL)) == NULL)
1785 flog(LOG_WARNING, "could not convert native path into a wcs (%s): %s", buf, strerror(errno));
1786 else
1787 transfersetpath(peer->transfer, buf2);
1788 free(buf);
1789 }
1790 if(fstat(fd, &sb) < 0)
1791 {
1792 close(fd);
1793 flog(LOG_WARNING, "could not stat file %ls: %s", node->name, strerror(errno));
1794 qstrf(sk, "$Error|");
1795 freedcpeer(peer);
1796 return;
1797 }
1798 if((offset != 0) && (lseek(fd, offset, SEEK_SET) < 0))
1799 {
1800 close(fd);
1801 qstrf(sk, "$Error Offset out of range|");
1802 freedcpeer(peer);
1803 return;
1804 }
1805 lesk = wrapsock(fd);
1806 transferprepul(peer->transfer, sb.st_size, offset, -1, lesk);
1807 putsock(lesk);
1808 qstrf(sk, "$FileLength %i|", peer->transfer->size);
d3372da9 1809}
1810
1811static void cmd_send(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1812{
1813 if(peer->transfer == NULL)
1814 {
1815 freedcpeer(peer);
1816 return;
1817 }
1818 if(peer->transfer->localend == NULL)
1819 {
1820 freedcpeer(peer);
1821 return;
1822 }
1823 peer->ptclose = 1;
9a2d6cb8 1824 startul(peer);
d3372da9 1825}
1826
1827static void cmd_supports(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1828{
1829 int i;
1830 char *p, *p2;
1831 char **arr;
1832 size_t arrsize, arrdata;
1833
1834 if(peer->supports != NULL)
1835 {
1836 for(i = 0; peer->supports[i] != NULL; i++)
1837 free(peer->supports[i]);
1838 free(peer->supports);
1839 }
1840 arr = NULL;
1841 arrsize = arrdata = 0;
1842 p = args;
1843 do
1844 {
1845 if((p2 = strchr(p, ' ')) != NULL)
1846 *(p2++) = 0;
1847 if(*p == 0)
1848 continue;
1849 addtobuf(arr, sstrdup(p));
1850 } while((p = p2) != NULL);
1851 addtobuf(arr, NULL);
1852 peer->supports = arr;
d3372da9 1853}
1854
1855static void cmd_getblock(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1856{
1857 int fd;
1858 char *p, *p2;
1859 int start, numbytes;
1860 char *charset, *buf;
1861 wchar_t *buf2;
1862 struct sharecache *node;
1863 struct stat sb;
1864 struct socket *lesk;
1865
1866 if(peer->transfer == NULL)
1867 {
1868 freedcpeer(peer);
1869 return;
1870 }
1871 p = args;
1872 if((p2 = strchr(p, ' ')) == NULL)
1873 {
1874 freedcpeer(peer);
1875 return;
1876 }
1877 *(p2++) = 0;
1878 start = atoi(p);
1879 p = p2;
1880 if((p2 = strchr(p, ' ')) == NULL)
1881 {
1882 freedcpeer(peer);
1883 return;
1884 }
1885 *(p2++) = 0;
1886 numbytes = atoi(p);
1887 p = p2;
1888 if(!strcmp(cmd, "$UGetBlock") || !strcmp(cmd, "$UGetZBlock"))
1889 charset = "UTF-8";
1890 else
1891 charset = DCCHARSET;
1892 if(!strcmp(cmd, "$GetZBlock") || !strcmp(cmd, "$UGetZBlock"))
1893 initcompress(peer, CPRS_ZLIB);
1894 if(((fd = openfilelist(p)) < 0) && (errno != 0))
1895 {
1896 qstr(sk, "$Error Could not send file list|");
1897 return;
1898 } else if(fd >= 0) {
1899 if((buf2 = icsmbstowcs(args, charset, NULL)) != NULL)
1900 transfersetpath(peer->transfer, buf2);
1901 }
1902 if(fd < 0)
1903 {
1904 if(slotsleft() < 1)
1905 {
1906 qstr(sk, "$MaxedOut|");
1907 return;
1908 }
1909 if((node = resdcpath(p, charset, '\\')) == NULL)
1910 {
1911 qstr(sk, "$Error File not in cache|");
1912 return;
1913 }
1914 if((fd = opensharecache(node)) < 0)
1915 {
1916 qstrf(sk, "$Error %s|", strerror(errno));
1917 return;
1918 }
1919 buf = getfspath(node);
1920 if((buf2 = icsmbstowcs(buf, NULL, NULL)) == NULL)
1921 flog(LOG_WARNING, "could not convert native path into a wcs (%s): %s", buf, strerror(errno));
1922 else
1923 transfersetpath(peer->transfer, buf2);
1924 free(buf);
1925 }
1926 if(fstat(fd, &sb) < 0)
1927 {
1928 close(fd);
1929 flog(LOG_WARNING, "could not stat file %ls: %s", node->name, strerror(errno));
1930 qstr(sk, "$Error|");
1931 return;
1932 }
1933 if((start != 0) && ((start >= sb.st_size) || (lseek(fd, start, SEEK_SET) < 0)))
1934 {
1935 close(fd);
1936 qstr(sk, "$Error Offset out of range|");
1937 return;
1938 }
1939 if((numbytes < 0) || (start + numbytes > sb.st_size))
1940 numbytes = sb.st_size - start;
1941 lesk = wrapsock(fd);
1942 transferprepul(peer->transfer, sb.st_size, start, start + numbytes, lesk);
1943 putsock(lesk);
1944 qstrf(sk, "$Sending %i|", numbytes);
9a2d6cb8 1945 startul(peer);
d3372da9 1946}
1947
1948static void cmd_adcget(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1949{
1950 int i;
1951 char **argv, *buf;
1952 int start, numbytes;
1953 struct sharecache *node;
1954 struct stat sb;
1955 struct socket *lesk;
1956 wchar_t *wbuf;
1957 int fd;
1958
1959 if(peer->transfer == NULL)
1960 {
1961 freedcpeer(peer);
1962 return;
1963 }
1964 if((argv = parseadc(args)) == NULL)
1965 {
1966 freedcpeer(peer);
1967 return;
1968 }
1969 if(parrlen(argv) < 4)
1970 {
1971 freedcpeer(peer);
1972 goto out;
1973 }
1974 start = atoi(argv[2]);
1975 numbytes = atoi(argv[3]);
1976 node = NULL;
1977 fd = -1;
1978 if(((fd = openfilelist(argv[1])) < 0) && (errno != 0))
1979 {
1980 qstr(sk, "$Error Could not send file list|");
1981 goto out;
1982 } else if(fd >= 0) {
1983 if((wbuf = icsmbstowcs(argv[1], "UTF-8", NULL)) != NULL)
1984 transfersetpath(peer->transfer, wbuf);
1985 }
1986 if(fd < 0)
1987 {
1988 if(slotsleft() < 1)
1989 {
1990 qstr(sk, "$MaxedOut|");
1991 goto out;
1992 }
1993 if(!strncmp(argv[1], "TTH/", 4))
1994 {
1995 if((node = findbytth(argv[1] + 4)) == NULL)
1996 {
1997 qstr(sk, "$Error File not in cache|");
1998 goto out;
1999 }
2000 } else {
9a2d6cb8 2001 if((node = resdcpath((argv[1][0] == '/')?(argv[1] + 1):(argv[1]), "UTF-8", '/')) == NULL)
d3372da9 2002 {
2003 qstr(sk, "$Error File not in cache|");
2004 goto out;
2005 }
2006 }
2007 if((fd = opensharecache(node)) < 0)
2008 {
2009 qstrf(sk, "$Error %s|", strerror(errno));
2010 goto out;
2011 }
2012 buf = getfspath(node);
2013 if((wbuf = icsmbstowcs(buf, NULL, NULL)) == NULL)
2014 flog(LOG_WARNING, "could not convert native path into a wcs (%s): %s", buf, strerror(errno));
2015 else
2016 transfersetpath(peer->transfer, wbuf);
2017 free(buf);
2018 }
2019 if(!strcmp(argv[0], "file"))
2020 {
2021 for(i = 4; argv[i] != NULL; i++)
2022 {
2023 if(!strcmp(argv[i], "ZL1"))
2024 initcompress(peer, CPRS_ZLIB);
2025 }
2026 if(fstat(fd, &sb) < 0)
2027 {
2028 flog(LOG_WARNING, "could not stat file %ls: %s", node->name, strerror(errno));
2029 qstr(sk, "$Error|");
2030 goto out;
2031 }
2032 if((start != 0) && ((start >= sb.st_size) || (lseek(fd, start, SEEK_SET) < 0)))
2033 {
2034 qstr(sk, "$Error Offset out of range|");
2035 goto out;
2036 }
2037 if((numbytes < 0) || (start + numbytes > sb.st_size))
2038 numbytes = sb.st_size - start;
2039 lesk = wrapsock(fd);
2040 transferprepul(peer->transfer, sb.st_size, start, start + numbytes, lesk);
2041 putsock(lesk);
2042 fd = -1;
2043 qstr(sk, "$ADCSND");
2044 sendadc(sk, "file");
2045 sendadc(sk, argv[1]);
2046 sendadcf(sk, "%i", start);
2047 sendadcf(sk, "%i", numbytes);
2048 if(peer->compress == CPRS_ZLIB)
2049 sendadc(sk, "ZL1");
2050 qstr(sk, "|");
9a2d6cb8 2051 startul(peer);
d3372da9 2052 } else if(!strcmp(argv[0], "tthl")) {
2053 /*
2054 * XXX: Implement full TTHL support.
2055 *
2056 * In the meantime, this is better than nothing, since it at
2057 * least allows fetching of the TTH root if it isn't already
2058 * known.
2059 */
2060 if(node == NULL)
2061 {
2062 qstr(sk, "$Error no TTHL data for virtual files|");
2063 goto out;
2064 }
2065 qstr(sk, "$ADCSND");
2066 sendadc(sk, "tthl");
2067 sendadc(sk, argv[1]);
2068 sendadc(sk, "0");
2069 sendadc(sk, "24");
2070 qstr(sk, "|");
2071 sockqueue(sk, node->hashtth, 24);
2072 } else {
2073 qstr(sk, "$Error Namespace not implemented|");
2074 goto out;
2075 }
d3372da9 2076
2077 out:
2078 if(fd >= 0)
2079 close(fd);
2080 freeparr(argv);
2081}
2082
9a2d6cb8 2083static void handletthl(struct dcpeer *peer)
2084{
2085 char buf[24];
2086
2087 while(peer->inbufdata >= 24)
2088 {
2089 pushtigertree(&peer->tth, peer->inbuf);
2090 memmove(peer->inbuf, peer->inbuf + 24, peer->inbufdata -= 24);
e52006fe 2091 peer->curread += 24;
9a2d6cb8 2092 }
e52006fe 2093 if(peer->curread >= peer->totalsize)
9a2d6cb8 2094 {
2095 peer->state = PEER_CMD;
2096 synctigertree(&peer->tth);
2097 restigertree(&peer->tth, buf);
2098 transfersethash(peer->transfer, newhash(L"TTH", 24, buf));
2099 requestfile(peer);
2100 }
2101}
2102
2103static void cmd_adcsnd(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
2104{
2105 char **argv;
2106 int start, numbytes;
2107
2108 if(peer->transfer == NULL)
2109 {
2110 freedcpeer(peer);
2111 return;
2112 }
2113 if((argv = parseadc(args)) == NULL)
2114 {
2115 freedcpeer(peer);
2116 return;
2117 }
2118 if(parrlen(argv) < 4)
2119 {
2120 freedcpeer(peer);
2121 goto out;
2122 }
2123 start = atoi(argv[2]);
2124 numbytes = atoi(argv[3]);
2125 if(!strcmp(argv[0], "tthl"))
2126 {
2127 if((start != 0) || (numbytes % 24 != 0))
2128 {
2129 /* Weird. Bail out. */
2130 freedcpeer(peer);
2131 goto out;
2132 }
2133 peer->state = PEER_TTHL;
2134 peer->totalsize = numbytes;
2135 peer->curread = 0;
2136 inittigertree(&peer->tth);
2137 handletthl(peer);
2138 } else if(!strcmp(argv[0], "file")) {
2139 if(start != peer->transfer->curpos)
2140 {
2141 freedcpeer(peer);
2142 goto out;
2143 }
2144 if(start + numbytes != peer->transfer->size)
2145 {
2146 transfersetsize(peer->transfer, start + numbytes);
2147 freedcpeer(peer);
2148 goto out;
2149 }
2150 startdl(peer);
e52006fe 2151 if(peer->inbufdata > 0)
2152 {
2153 sockpushdata(sk, peer->inbuf, peer->inbufdata);
2154 peer->inbufdata = 0;
2155 transread(sk, peer);
2156 }
9a2d6cb8 2157 } else {
2158 /* We certainly didn't request this...*/
2159 freedcpeer(peer);
2160 goto out;
2161 }
2162
2163 out:
2164 freeparr(argv);
2165}
2166
2167static void cmd_sending(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
2168{
2169 int numbytes;
2170
2171 if(peer->transfer == NULL)
2172 {
2173 freedcpeer(peer);
2174 return;
2175 }
2176 numbytes = atoi(args);
2177 if(peer->transfer->size - peer->transfer->curpos != numbytes)
2178 {
2179 transfersetsize(peer->transfer, peer->transfer->curpos + numbytes);
2180 freedcpeer(peer);
2181 return;
2182 }
2183 startdl(peer);
0d8c93cb 2184 if(peer->inbufdata > 0)
2185 {
2186 sockpushdata(sk, peer->inbuf, peer->inbufdata);
2187 peer->inbufdata = 0;
2188 transread(sk, peer);
2189 }
9a2d6cb8 2190}
2191
d3372da9 2192/*
2193Hub skeleton:
2194static void cmd_(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
2195{
2196 struct dchub *hub;
2197
2198 hub = fn->data;
2199 hubhandleaction(sk, fn, cmd, args);
2200}
2201
2202Peer skeleton:
2203static void cmd_(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
2204{
d3372da9 2205}
2206
2207*/
2208
2209static int hubreqconn(struct fnetpeer *peer)
2210{
2211 struct dchub *hub;
2212 char *mbsnick;
2213
2214 if((peer->fn->state != FNN_EST) || (peer->fn->fnet != &dcnet))
2215 {
2216 errno = EINVAL;
2217 return(1);
2218 }
2219 if((hub = peer->fn->data) == NULL)
2220 {
2221 errno = EFAULT;
2222 return(1);
2223 }
2224 if((mbsnick = icwcstombs(peer->id, DCCHARSET)) == NULL)
2225 return(1); /* Shouldn't happen, of course, but who knows... */
2226 if(tcpsock != NULL)
2227 {
2228 sendctm(peer->fn->sk, mbsnick);
2229 expectpeer(mbsnick, peer->fn);
2230 } else {
2231 qstrf(peer->fn->sk, "$RevConnectToMe %s %s|", hub->nativenick, mbsnick);
2232 }
2233 free(mbsnick);
2234 return(0);
2235}
2236
2237static int hubsendchat(struct fnetnode *fn, int public, wchar_t *to, wchar_t *string)
2238{
2239 struct dchub *hub;
2240 char *mbsstring, *mbsto;
2241
2242 hub = fn->data;
2243 if((mbsto = icwcstombs(to, DCCHARSET)) == NULL)
2244 {
2245 errno = EILSEQ;
2246 return(1);
2247 }
2248 if((mbsstring = icwcstombs(string, DCCHARSET)) == NULL)
2249 {
2250 errno = EILSEQ;
2251 return(1);
2252 }
2253 if((strchr(mbsto, '|') != NULL) || (strchr(mbsto, ' ') != NULL))
2254 {
2255 free(mbsto);
2256 free(mbsstring);
2257 errno = ESRCH;
2258 return(1);
2259 }
2260 if(strchr(mbsstring, '|') != NULL)
2261 {
2262 free(mbsto);
2263 free(mbsstring);
2264 errno = EILSEQ;
2265 return(1);
2266 }
2267 if(public)
2268 {
2269 if(*to == L'\0')
2270 {
2271 qstrf(fn->sk, "<%s> %s|", hub->nativenick, mbsstring);
2272 } else {
2273 qstrf(fn->sk, "$To: %s From: %s $<%s> %s|", mbsto, hub->nativenick, hub->nativenick, mbsstring);
2274 }
2275 } else {
2276 qstrf(fn->sk, "$To: %s From: %s $<%s> %s|", mbsto, hub->nativenick, hub->nativenick, mbsstring);
2277 }
2278 free(mbsto);
2279 free(mbsstring);
2280 return(0);
2281}
2282
2283static void findsizelimit(struct sexpr *sexpr, int *min, int *max)
2284{
2285 int minl, maxl, minr, maxr, retmin, retmax;
2286
2287 switch(sexpr->op)
2288 {
2289 case SOP_AND:
2290 findsizelimit(sexpr->l, &minl, &maxl);
2291 findsizelimit(sexpr->r, &minr, &maxr);
2292 retmin = (minl > minr)?minl:minr;
2293 if((maxl != -1) && (maxr != -1))
2294 retmax = (maxl < maxr)?maxl:maxr;
2295 else if(maxl != -1)
2296 retmax = maxl;
2297 else if(maxr != -1)
2298 retmax = maxr;
2299 else
2300 retmax = -1;
2301 break;
2302 case SOP_OR:
2303 findsizelimit(sexpr->l, &minl, &maxl);
2304 findsizelimit(sexpr->r, &minr, &maxr);
2305 retmin = (minl < minr)?minl:minr;
2306 if((maxl == -1) || (maxr == -1))
2307 retmax = -1;
2308 else
2309 retmax = (maxl > maxr)?maxl:maxr;
2310 break;
2311 case SOP_NOT:
2312 findsizelimit(sexpr->l, &minl, &maxl);
2313 if((minl == 0) && (maxl == -1)) /* Interval is unspecified */
2314 {
2315 retmin = 0;
2316 retmax = -1;
2317 } else if((minl == 0) && (maxl != -1)) {
2318 retmin = maxl + 1;
2319 retmax = -1;
2320 } else if((minl != 0) && (maxl == -1)) {
2321 retmin = 0;
2322 retmax = minl - 1;
2323 } else { /* This would yield two seperate intervals, which DC cannot handle */
2324 retmin = 0;
2325 retmax = -1;
2326 }
2327 case SOP_SIZELT:
2328 retmin = 0;
2329 retmax = sexpr->d.n - 1;
2330 break;
2331 case SOP_SIZEEQ:
2332 retmin = sexpr->d.n;
2333 retmax = sexpr->d.n;
2334 break;
2335 case SOP_SIZEGT:
2336 retmin = sexpr->d.n + 1;
2337 retmax = -1;
2338 break;
2339 default:
2340 retmin = 0;
2341 retmax = -1;
2342 break;
2343 }
2344 if(min != NULL)
2345 *min = retmin;
2346 if(max != NULL)
2347 *max = retmax;
2348}
2349
9d8cf743 2350static struct hash *findsehash(struct sexpr *sexpr)
2351{
2352 struct hash *h1, *h2;
2353
2354 switch(sexpr->op)
2355 {
2356 case SOP_AND:
2357 if((h1 = findsehash(sexpr->l)) != NULL)
2358 return(h1);
2359 if((h1 = findsehash(sexpr->r)) != NULL)
2360 return(h1);
2361 break;
2362 case SOP_OR:
2363 h1 = findsehash(sexpr->l);
2364 h2 = findsehash(sexpr->r);
2365 if(hashcmp(h1, h2))
2366 return(h1);
2367 break;
2368 case SOP_HASHIS:
2369 if(!wcscmp(sexpr->d.hash->algo, L"TTH"))
2370 return(sexpr->d.hash);
2371 default:
2372 break;
2373 }
2374 return(NULL);
2375}
2376
d3372da9 2377static int hubsearch(struct fnetnode *fn, struct search *srch, struct srchfnnlist *ln)
2378{
2379 struct dchub *hub;
2380 struct wcslist *list, *cur;
2381 char *sstr, *buf, *p;
2382 size_t sstrsize, sstrdata;
2383 struct sockaddr *name;
2384 socklen_t namelen;
2385 int minsize, maxsize;
9d8cf743 2386 struct hash *hash;
d3372da9 2387
2388 hub = fn->data;
2389 if((fn->state != FNN_EST) || (fn->sk == NULL) || (fn->sk->state != SOCK_EST))
2390 return(1);
2391 list = findsexprstrs(srch->sexpr);
2392 findsizelimit(srch->sexpr, &minsize, &maxsize);
9d8cf743 2393 hash = findsehash(srch->sexpr);
d3372da9 2394 if((minsize != 0) && (maxsize != -1))
2395 {
2396 /* Choose either minsize or maxsize by trying to determine
2397 * which choice will be most restrictive. The result can be
2398 * approximative at best anyway, so don't try too hard... */
2399 if((50000000 - maxsize) > (minsize - 50000000))
2400 minsize = 0;
2401 else
2402 maxsize = -1;
2403 }
d3372da9 2404 sstr = NULL;
2405 sstrsize = sstrdata = 0;
9d8cf743 2406 if((hash != NULL) && (hash->len == 24))
d3372da9 2407 {
9d8cf743 2408 /* Prioritize hash searches above all else */
2409 bufcat(sstr, "F?T?0?9?TTH:", 12);
2410 buf = base32encode(hash->buf, hash->len);
2411
2412 bufcat(sstr, buf, 39);
2413 free(buf);
2414 } else {
2415 if(minsize != 0)
d3372da9 2416 {
9d8cf743 2417 sizebuf2(sstr, sstrdata + 32, 1);
2418 snprintf(sstr + sstrdata, sstrsize - sstrdata, "T?F?%i?1?", minsize);
2419 } else if(maxsize != -1) {
2420 sizebuf2(sstr, sstrdata + 32, 1);
2421 snprintf(sstr + sstrdata, sstrsize - sstrdata, "T?T?%i?1?", maxsize);
2422 } else {
2423 bufcat(sstr, "F?F?0?1?", 8);
2424 }
2425 if(list != NULL)
2426 {
2427 for(cur = list; cur != NULL; cur = cur->next)
d3372da9 2428 {
9d8cf743 2429 if((buf = icwcstombs(cur->str, DCCHARSET)) == NULL)
2430 {
2431 /* Can't find anything anyway if the search expression
2432 * requires characters outside DC's charset. There's
2433 * nothing technically wrong with the search itself,
2434 * however, so return success. This should be
2435 * considered as an optimization. */
2436 freesl(&list);
2437 if(sstr != NULL)
2438 free(sstr);
2439 return(0);
2440 }
2441 if(cur != list)
2442 addtobuf(sstr, '$');
2443 /*
2444 * It probably doesn't hurt if buf contains any extra
2445 * dollar signs - it will just result in extra search
2446 * terms, and the extraneous results will be filtered by
2447 * the search layer anyway. It hurts if it contains any
2448 * pipes, though, so let's sell them for money.
2449 */
2450 for(p = buf; *p; p++)
2451 {
2452 if(*p == '|')
2453 *p = '$';
2454 }
2455 bufcat(sstr, buf, strlen(buf));
2456 free(buf);
d3372da9 2457 }
9d8cf743 2458 } else {
2459 /* Will match all files... :-/ */
2460 addtobuf(sstr, '.');
d3372da9 2461 }
d3372da9 2462 }
2463 addtobuf(sstr, 0);
2464 if(tcpsock != NULL)
2465 {
2466 if(sockgetremotename(udpsock, &name, &namelen) < 0)
2467 {
2468 flog(LOG_WARNING, "cannot get address of UDP socket");
2469 } else {
9d8cf743 2470 qstrf(fn->sk, "$Search %s %s|", formataddress(name, namelen), sstr);
d3372da9 2471 free(name);
2472 }
2473 } else {
9d8cf743 2474 qstrf(fn->sk, "$Search Hub:%s %s|", hub->nativenick, sstr);
d3372da9 2475 }
2476 free(sstr);
2477 freesl(&list);
2478 fn->lastsrch = time(NULL);
2479 return(0);
2480}
2481
2482#undef skipcmd
2483#undef qstr
2484#undef qstrf
2485
2486#define cc(c) ((void (*)(struct socket *, void *, char *, char *))(c))
2487struct command hubcmds[] =
2488{
2489 {"$Lock", cc(cmd_lock)},
2490 {"$HubName", cc(cmd_hubname)},
2491 {"$Hello", cc(cmd_hello)},
2492 {"$Quit", cc(cmd_quit)},
2493 {"$NickList", cc(cmd_nicklist)},
2494 {"$OpList", cc(cmd_oplist)},
2495 {"$MyINFO", cc(cmd_myinfo)},
2496 {"$ForceMove", cc(cmd_forcemove)},
2497 {"$Search", cc(cmd_search)},
2498 {"$MultiSearch", cc(cmd_search)},
2499 {"$ConnectToMe", cc(cmd_connecttome)},
2500 {"$RevConnectToMe", cc(cmd_revconnecttome)},
2501 {"$GetNetInfo", cc(cmd_getnetinfo)},
2502 {"$To:", cc(cmd_to)},
2503 {"$SR", cc(cmd_sr)},
2504 {"$UserCommand", cc(cmd_usercommand)},
48509089 2505 {"$GetPass", cc(cmd_getpass)},
c9b3ad74 2506 {"$LogedIn", cc(cmd_logedin)}, /* sic */
d3372da9 2507 {NULL, NULL}
2508};
2509
2510struct command peercmds[] =
2511{
2512 {"$MyNick", cc(cmd_mynick)},
2513 {"$Lock", cc(cmd_peerlock)},
2514 {"$Direction", cc(cmd_direction)},
2515 {"$Key", cc(cmd_key)},
2516 {"$FileLength", cc(cmd_filelength)},
2517 {"$Error", cc(cmd_error)},
2518 {"$MaxedOut", cc(cmd_maxedout)},
2519 {"$Get", cc(cmd_get)},
2520 {"$Send", cc(cmd_send)},
2521 {"$Supports", cc(cmd_supports)},
2522 {"$GetBlock", cc(cmd_getblock)},
2523 {"$UGetBlock", cc(cmd_getblock)},
2524 {"$GetZBlock", cc(cmd_getblock)},
2525 {"$UGetZBlock", cc(cmd_getblock)},
2526 {"$ADCGET", cc(cmd_adcget)},
9a2d6cb8 2527 {"$ADCSND", cc(cmd_adcsnd), 1},
2528 {"$Sending", cc(cmd_sending), 1},
d3372da9 2529 {NULL, NULL}
2530};
2531#undef cc
2532
2533static void dctransdetach(struct transfer *transfer, struct dcpeer *peer)
2534{
2535 CBUNREG(transfer, trans_filterout, peer);
2536 if(peer->freeing)
2537 return;
2538 peer->transfer = NULL;
2539 freedcpeer(peer);
2540}
2541
2542static void dctransgotdata(struct transfer *transfer, struct dcpeer *peer)
2543{
2544 int ret;
2545 void *buf;
2546 char outbuf[1024];
2547 z_stream *cstr;
2548 size_t bufsize;
2549
2550 if((peer->state == PEER_TRNS) || (peer->state == PEER_SYNC))
2551 {
2552 if(sockqueuesize(peer->sk) < 65536)
2553 {
2554 if((buf = transfergetdata(transfer, &bufsize)) != NULL)
2555 {
2556 if(peer->compress == CPRS_NONE)
2557 {
2558 sockqueue(peer->sk, buf, bufsize);
2559 } else if(peer->compress == CPRS_ZLIB) {
2560 cstr = peer->cprsdata;
2561 cstr->next_in = buf;
2562 cstr->avail_in = bufsize;
2563 while(cstr->avail_in > 0)
2564 {
2565 cstr->next_out = outbuf;
2566 cstr->avail_out = sizeof(outbuf);
2567 if((ret = deflate(cstr, 0)) != Z_OK)
2568 {
2569 flog(LOG_WARNING, "bug? deflate() did not return Z_OK (but rather %i)", ret);
2570 freedcpeer(peer);
2571 return;
2572 }
2573 sockqueue(peer->sk, outbuf, sizeof(outbuf) - cstr->avail_out);
2574 }
2575 }
2576 free(buf);
2577 }
2578 if(peer->state == PEER_SYNC)
2579 {
2580 if(peer->compress == CPRS_ZLIB)
2581 {
2582 cstr = peer->cprsdata;
2583 cstr->next_in = NULL;
2584 cstr->avail_in = 0;
2585 do
2586 {
2587 cstr->next_out = outbuf;
2588 cstr->avail_out = sizeof(outbuf);
2589 ret = deflate(cstr, Z_FINISH);
2590 if((ret != Z_OK) && (ret != Z_STREAM_END))
2591 {
2592 flog(LOG_WARNING, "bug? deflate(Z_FINISH) did not return Z_OK (but rather %i)", ret);
2593 freedcpeer(peer);
2594 return;
2595 }
2596 sockqueue(peer->sk, outbuf, sizeof(outbuf) - cstr->avail_out);
2597 } while(ret != Z_STREAM_END);
2598 }
2599 if(peer->ptclose)
2600 {
2601 freedcpeer(peer);
2602 } else {
2603 peer->state = PEER_CMD;
2604 endcompress(peer);
2605 transfersetstate(transfer, TRNS_HS);
2606 socksettos(peer->sk, confgetint("fnet", "fnptos"));
2607 peer->sk->writecb = NULL;
2608 }
2609 }
2610 }
2611 }
2612}
2613
2614static void dctransendofdata(struct transfer *transfer, struct dcpeer *peer)
2615{
2616 peer->state = PEER_SYNC;
2617 dctransgotdata(transfer, peer);
2618}
2619
2620static void dcwantdata(struct transfer *transfer, struct dcpeer *peer)
2621{
2622 if(transferdatasize(transfer) < 65536)
2623 peer->sk->ignread = 0;
2624}
2625
2626static void transread(struct socket *sk, struct dcpeer *peer)
2627{
2628 void *buf;
2629 size_t bufsize;
2630 struct transfer *transfer;
2631
2632 if((buf = sockgetinbuf(sk, &bufsize)) == NULL)
2633 return;
2634 if(peer->transfer == NULL)
2635 {
2636 free(buf);
2637 freedcpeer(peer);
2638 return;
2639 }
2640 transferputdata(peer->transfer, buf, bufsize);
2641 free(buf);
2642 if(peer->transfer->curpos >= peer->transfer->size)
2643 {
2644 transfer = peer->transfer;
2645 transferdetach(transfer);
2646 transferendofdata(transfer);
2647 return;
2648 }
2649 if(transferdatasize(peer->transfer) > 65535)
2650 sk->ignread = 1;
2651}
2652
2653static void transerr(struct socket *sk, int err, struct dcpeer *peer)
2654{
2655 struct transfer *transfer;
2656
2657 if((transfer = peer->transfer) == NULL)
2658 {
2659 freedcpeer(peer);
2660 return;
2661 }
2662 transferdetach(transfer);
2663 transferendofdata(transfer);
2664}
2665
2666static void transwrite(struct socket *sk, struct dcpeer *peer)
2667{
2668 if((peer->state != PEER_TRNS) && (peer->state != PEER_SYNC))
2669 return;
2670 if(peer->transfer == NULL)
2671 {
2672 freedcpeer(peer);
2673 return;
2674 }
2675 dctransgotdata(peer->transfer, peer);
2676}
2677
2678static void udpread(struct socket *sk, void *data)
2679{
d86b7a9f 2680 char *buf, *p, *p2, *hashbuf;
2681 size_t buflen, hashlen;
d3372da9 2682 char *nick, *filename, *hubname;
2683 int size, slots;
2684 struct fnetnode *fn, *myfn;
2685 struct dchub *hub;
2686 struct srchres *sr;
2687 wchar_t *wnick, *wfile;
d86b7a9f 2688 struct hash *hash;
d3372da9 2689
2690 if((buf = sockgetinbuf(sk, &buflen)) == NULL)
2691 return;
2692 buf = srealloc(buf, buflen + 1);
2693 buf[buflen] = 0;
2694 if(!strncmp(buf, "$SR ", 4))
2695 {
2696 p = buf + 4;
2697 nick = p;
2698 if((p2 = strchr(p, ' ')) == NULL)
2699 {
2700 free(buf);
2701 return;
2702 }
2703 *p2 = 0;
2704 p = p2 + 1;
2705 filename = p;
2706 if((p2 = strchr(p, 5)) == NULL)
2707 {
2708 free(buf);
2709 return;
2710 }
2711 *p2 = 0;
2712 p = p2 + 1;
2713 if((p2 = strchr(p, ' ')) == NULL)
2714 {
2715 free(buf);
2716 return;
2717 }
2718 *p2 = 0;
2719 size = atoi(p);
2720 p = p2 + 1;
2721 if((p2 = strchr(p, '/')) == NULL)
2722 {
2723 free(buf);
2724 return;
2725 }
2726 *p2 = 0;
2727 slots = atoi(p);
2728 p = p2 + 1;
2729 if((p2 = strchr(p, 5)) == NULL)
2730 {
2731 free(buf);
2732 return;
2733 }
2734 p = p2 + 1;
2735 hubname = p;
2736 if((p2 = strstr(p, " (")) == NULL)
2737 {
2738 free(buf);
2739 return;
2740 }
2741 *p2 = 0;
2742 if((wnick = icmbstowcs(nick, DCCHARSET)) == NULL)
2743 {
2744 free(buf);
2745 return;
2746 }
2747 if((wfile = icmbstowcs(filename, DCCHARSET)) == NULL)
2748 {
2749 free(wnick);
2750 free(buf);
2751 return;
2752 }
2753 myfn = NULL;
d86b7a9f 2754 hash = NULL;
2755 if(!strncmp(hubname, "TTH:", 4))
d3372da9 2756 {
d86b7a9f 2757 if((hashbuf = base32decode(hubname + 4, &hashlen)) != NULL)
2758 {
2759 if(hashlen == 24)
2760 hash = newhash(L"TTH", 24, hashbuf);
2761 free(hashbuf);
2762 }
2763 } else {
2764 for(fn = fnetnodes; fn != NULL; fn = fn->next)
d3372da9 2765 {
d86b7a9f 2766 if((fn->fnet == &dcnet) && ((hub = fn->data) != NULL))
d3372da9 2767 {
d86b7a9f 2768 if((hub->nativename != NULL) && !strcmp(hub->nativename, hubname))
d3372da9 2769 {
d86b7a9f 2770 if(myfn == NULL)
2771 {
2772 myfn = fn;
2773 } else {
2774 myfn = NULL;
2775 break;
2776 }
d3372da9 2777 }
2778 }
2779 }
2780 }
2781 sr = newsrchres(&dcnet, wfile, wnick);
2782 if(sr->peernick != NULL)
2783 free(sr->peernick);
2784 sr->peernick = swcsdup(wnick);
2785 sr->size = size;
2786 sr->slots = slots;
2787 free(wfile);
2788 free(wnick);
2789 if(myfn != NULL)
2790 getfnetnode(sr->fn = myfn);
d86b7a9f 2791 if(hash != NULL)
2792 sr->hash = hash;
d3372da9 2793 submitsrchres(sr);
2794 freesrchres(sr);
2795 }
2796 free(buf);
2797}
2798
2799static void hubread(struct socket *sk, struct fnetnode *fn)
2800{
2801 struct dchub *hub;
2802 char *newbuf;
2803 size_t datalen;
2804 char *p;
2805
2806 hub = (struct dchub *)fn->data;
2807 if((newbuf = sockgetinbuf(sk, &datalen)) == NULL)
2808 return;
2809 if(hub->inbufdata > 500000) /* Discard possible malicious data */
2810 hub->inbufdata = 0;
2811 sizebuf2(hub->inbuf, hub->inbufdata + datalen, 1);
2812 memcpy(hub->inbuf + hub->inbufdata, newbuf, datalen);
2813 free(newbuf);
2814 p = hub->inbuf + hub->inbufdata;
2815 hub->inbufdata += datalen;
2816 while((datalen > 0) && ((p = memchr(p, '|', datalen)) != NULL))
2817 {
2818 *(p++) = 0;
2819 newqcmd(&hub->queue, hub->inbuf);
2820 memmove(hub->inbuf, p, hub->inbufdata -= p - hub->inbuf);
2821 datalen = hub->inbufdata;
2822 p = hub->inbuf;
2823 }
2824}
2825
2826static void huberr(struct socket *sk, int err, struct fnetnode *fn)
2827{
2828 killfnetnode(fn);
2829}
2830
2831static int hubsetnick(struct fnetnode *fn, wchar_t *newnick)
2832{
2833 struct dchub *hub;
2834 char *buf;
2835
2836 hub = fn->data;
2837 if((buf = icwcstombs(newnick, DCCHARSET)) == NULL)
2838 return(1);
2839 if((strchr(buf, ' ') != NULL) || (strchr(buf, '|') != NULL) || (strchr(buf, '$') != NULL))
2840 {
2841 free(buf);
2842 return(1);
2843 }
2844 if(hub == NULL) /* Not yet connected */
2845 {
2846 free(buf);
2847 return(0);
2848 }
2849 if(hub->nativenick != NULL)
2850 free(hub->nativenick);
2851 hub->nativenick = buf;
2852 return(0);
2853}
2854
2855static struct dchub *newdchub(struct fnetnode *fn)
2856{
2857 struct dchub *new;
2858
2859 new = smalloc(sizeof(*new));
2860 memset(new, 0, sizeof(*new));
2861 fn->data = new;
2862 if(hubsetnick(fn, fn->mynick))
2863 fnetsetnick(fn, L"DoldaConnectUser-IN");
2864 /* IN as in Invalid Nick */
2865 return(new);
2866}
2867
2868static struct dcpeer *newdcpeer(struct socket *sk)
2869{
2870 struct dcpeer *new;
2871
2872 new = smalloc(sizeof(*new));
2873 memset(new, 0, sizeof(*new));
2874 new->transfer = NULL;
2875 getsock(sk);
2876 new->sk = sk;
2877 new->next = peers;
2878 new->prev = NULL;
2879 if(peers != NULL)
2880 peers->prev = new;
2881 peers = new;
2882 numdcpeers++;
2883 return(new);
2884}
2885
2886static void freedcpeer(struct dcpeer *peer)
2887{
2888 int i;
2889 struct qcommand *qcmd;
2890
2891 peer->freeing = 1;
2892 if(peers == peer)
2893 peers = peer->next;
2894 if(peer->next != NULL)
2895 peer->next->prev = peer->prev;
2896 if(peer->prev != NULL)
2897 peer->prev->next = peer->next;
2898 if(peer->transfer != NULL)
2899 {
2900 if(peer->transfer->dir == TRNSD_UP)
2901 peer->transfer->close = 1;
2902 if(peer->transfer->dir == TRNSD_DOWN)
2903 resettransfer(peer->transfer);
2904 transferdetach(peer->transfer);
2905 }
2906 if(peer->sk->data == peer)
2907 peer->sk->data = NULL;
2908 peer->sk->readcb = NULL;
2909 peer->sk->writecb = NULL;
2910 peer->sk->errcb = NULL;
2911 putsock(peer->sk);
2912 endcompress(peer);
2913 if(peer->supports != NULL)
2914 {
2915 for(i = 0; peer->supports[i] != NULL; i++)
2916 free(peer->supports[i]);
2917 free(peer->supports);
2918 }
d3372da9 2919 if(peer->inbuf != NULL)
2920 free(peer->inbuf);
2921 if(peer->key != NULL)
2922 free(peer->key);
2923 if(peer->wcsname != NULL)
2924 free(peer->wcsname);
2925 if(peer->nativename != NULL)
2926 free(peer->nativename);
2927 if(peer->fn != NULL)
2928 putfnetnode(peer->fn);
2929 while((qcmd = ulqcmd(&peer->queue)) != NULL)
2930 freeqcmd(qcmd);
2931 free(peer);
2932 numdcpeers--;
2933}
2934
2935static void hubconnect(struct fnetnode *fn)
2936{
2937 fn->sk->readcb = (void (*)(struct socket *, void *))hubread;
2938 fn->sk->errcb = (void (*)(struct socket *, int, void *))huberr;
2939 getfnetnode(fn);
2940 fn->data = newdchub(fn);
2941 fn->sk->data = fn;
2942 return;
2943}
2944
2945static void hubdestroy(struct fnetnode *fn)
2946{
2947 struct dchub *hub;
2948 struct qcommand *qcmd;
2949
2950 hub = (struct dchub *)fn->data;
2951 if(fn->sk != NULL)
2952 {
2953 if(fn->sk->data == fn)
2954 {
2955 fn->sk->data = NULL;
2956 putfnetnode(fn);
2957 }
2958 }
2959 if(hub == NULL)
2960 return;
2961 while((qcmd = ulqcmd(&hub->queue)) != NULL)
2962 freeqcmd(qcmd);
2963 if(hub->nativename != NULL)
2964 free(hub->nativename);
2965 if(hub->nativenick != NULL)
2966 free(hub->nativenick);
2967 if(hub->inbuf != NULL)
2968 free(hub->inbuf);
2969 free(hub);
2970}
2971
2972static wchar_t *dcbasename(wchar_t *filename)
2973{
2974 wchar_t *ret;
2975
2976 if((ret = wcsrchr(filename, L'\\')) != NULL)
2977 return(ret + 1);
2978 return(filename);
2979}
2980
2981static struct transferiface dctransfer =
2982{
2983 .detach = (void (*)(struct transfer *, void *))dctransdetach,
2984 .gotdata = (void (*)(struct transfer *, void *))dctransgotdata,
2985 .endofdata = (void (*)(struct transfer *, void *))dctransendofdata,
2986 .wantdata = (void (*)(struct transfer *, void *))dcwantdata
2987};
2988
2989static struct fnet dcnet =
2990{
2991 .name = L"dc",
2992 .connect = hubconnect,
2993 .destroy = hubdestroy,
2994 .setnick = hubsetnick,
2995 .reqconn = hubreqconn,
2996 .sendchat = hubsendchat,
2997 .search = hubsearch,
2998 .filebasename = dcbasename
2999};
3000
3001static void peerread(struct socket *sk, struct dcpeer *peer)
3002{
3003 char *newbuf, *p;
3004 size_t datalen;
9a2d6cb8 3005 struct command *cmd;
d3372da9 3006
3007 if((newbuf = sockgetinbuf(sk, &datalen)) == NULL)
3008 return;
3009 sizebuf2(peer->inbuf, peer->inbufdata + datalen, 1);
3010 memcpy(peer->inbuf + peer->inbufdata, newbuf, datalen);
3011 free(newbuf);
d3372da9 3012 peer->inbufdata += datalen;
9a2d6cb8 3013 if(peer->state == PEER_CMD)
d3372da9 3014 {
d3372da9 3015 p = peer->inbuf;
9a2d6cb8 3016 while((peer->inbufdata > 0) && (p = memchr(peer->inbuf, '|', peer->inbufdata)) != NULL)
3017 {
3018 *(p++) = 0;
3019 newqcmd(&peer->queue, peer->inbuf);
3020 for(cmd = peercmds; cmd->handler != NULL; cmd++)
3021 {
5eee9d66 3022 if(!memcmp(peer->inbuf, cmd->name, strlen(cmd->name)) && ((peer->inbuf[strlen(cmd->name)] == ' ') || (peer->inbuf[strlen(cmd->name)] == '|')))
9a2d6cb8 3023 break;
3024 }
5eee9d66 3025 memmove(peer->inbuf, p, peer->inbufdata -= p - peer->inbuf);
9a2d6cb8 3026 if(cmd->stop)
3027 {
3028 peer->state = PEER_STOP;
3029 break;
3030 }
9a2d6cb8 3031 }
3032 } else if(peer->state == PEER_TTHL) {
3033 handletthl(peer);
d3372da9 3034 }
3035}
3036
3037static void peererror(struct socket *sk, int err, struct dcpeer *peer)
3038{
3039 freedcpeer(peer);
3040}
3041
3042static void peerconnect(struct socket *sk, int err, struct fnetnode *fn)
3043{
3044 struct dcpeer *peer;
3045
3046 if(err != 0)
3047 {
3048 putfnetnode(fn);
3049 return;
3050 }
3051 peer = newdcpeer(sk);
3052 peer->fn = fn;
3053 peer->accepted = 0;
3054 sk->readcb = (void (*)(struct socket *, void *))peerread;
3055 sk->errcb = (void (*)(struct socket *, int, void *))peererror;
3056 sk->data = peer;
3057 socksettos(sk, confgetint("fnet", "fnptos"));
d3372da9 3058 putsock(sk);
9a2d6cb8 3059 sendmynick(peer);
3060 sendpeerlock(peer);
d3372da9 3061}
3062
3063static void peeraccept(struct socket *sk, struct socket *newsk, void *data)
3064{
3065 struct dcpeer *peer;
3066
3067 peer = newdcpeer(newsk);
3068 peer->accepted = 1;
3069 newsk->readcb = (void (*)(struct socket *, void *))peerread;
3070 newsk->errcb = (void (*)(struct socket *, int, void *))peererror;
3071 newsk->data = peer;
3072 socksettos(newsk, confgetint("fnet", "fnptos"));
d3372da9 3073}
3074
3075static void updatehmlist(void)
3076{
3077 int i, lev, ic, ret;
3078 struct sharecache *node;
3079 char *buf, *buf2, numbuf[32];
3080 size_t bufsize, bufdata;
3081 int fd, ibuf;
3082
3083 bufdata = 0;
3084 buf = smalloc(bufsize = 65536);
3085 node = shareroot->child;
3086 lev = 0;
3087 while(1)
3088 {
3089 ic = 0;
3090 if((buf2 = icwcstombs(node->name, DCCHARSET)) != NULL)
3091 {
3092 for(i = 0; i < lev; i++)
3093 addtobuf(buf, 9);
3094 bufcat(buf, buf2, strlen(buf2));
3095 free(buf2);
3096 if(node->f.b.type == FILE_REG)
3097 {
3098 addtobuf(buf, '|');
3099 sprintf(numbuf, "%i", node->size);
3100 bufcat(buf, numbuf, strlen(numbuf));
3101 }
3102 addtobuf(buf, 13);
3103 addtobuf(buf, 10);
3104 } else {
3105 ic = 1;
3106 }
3107 if((node->child != NULL) && !ic)
3108 {
3109 lev++;
3110 node = node->child;
3111 } else if(node->next != NULL) {
3112 node = node->next;
3113 } else {
3114 while(node->next == NULL)
3115 {
3116 lev--;
3117 node = node->parent;
3118 if(node == shareroot)
3119 break;
3120 }
3121 if(node == shareroot)
3122 break;
3123 node = node->next;
3124 }
3125 }
3126 if(hmlistname != NULL)
3127 {
3128 unlink(hmlistname);
3129 free(hmlistname);
3130 }
3131 hmlistname = sstrdup("/tmp/dc-filelist-hm-XXXXXX");
3132 if((fd = mkstemp(hmlistname)) < 0)
3133 {
3134 flog(LOG_WARNING, "could not create HM file list tempfile: %s", strerror(errno));
3135 free(hmlistname);
3136 hmlistname = NULL;
3137 } else {
3138 /*
3139 * I do not want to implement a good Huffman encoder, and it's not
3140 * like Huffman encoding actually yields any impressive results
3141 * for DC file lists anyway, so I'll just output a bogus
3142 * tree. Implement a good encoder if you want to.
3143 */
3144 write(fd, "HE3\r\0", 5);
3145 write(fd, &bufdata, 4);
3146 ibuf = 256;
3147 write(fd, &ibuf, 2);
3148 ibuf = 8;
3149 for(i = 0; i < 256; i++)
3150 {
3151 write(fd, &i, 1);
3152 write(fd, &ibuf, 1);
3153 }
3154 for(i = 0; i < 256; i++)
3155 write(fd, &i, 1);
3156 for(buf2 = buf; bufdata > 0;)
3157 {
3158 if((ret = write(fd, buf2, bufdata)) < 0)
3159 {
3160 flog(LOG_WARNING, "could not write file list: %s", strerror(errno));
3161 break;
3162 }
3163 bufdata -= ret;
3164 buf2 += ret;
3165 }
3166 close(fd);
3167 }
3168 free(buf);
3169}
3170
3171static struct xmlent
3172{
3173 wchar_t c;
3174 wchar_t *ent;
3175} entities[] = {
3176 {L'&', L"&amp;"},
3177 {L'\"', L"&#34;"},
3178/* {L'\'', L"&quot;"}, Emulate DC++ escaping by omitting this. */
3179 {L'\0', NULL}
3180};
3181
3182static wchar_t *escapexml(wchar_t *src)
3183{
3184 static wchar_t *buf = NULL;;
3185 int ret, c;
3186 wchar_t nbuf[32];
3187 size_t bufsize, bufdata;
3188 struct xmlent *ent;
3189
3190 if(buf != NULL)
3191 free(buf);
3192 buf = NULL;
3193 bufsize = bufdata = 0;
3194 for(; *src != L'\0'; src++)
3195 {
3196 c = wctob(*src);
3197 if((c > 0) && (c < 32))
3198 {
3199 bufcat(buf, L"&#", 2);
3200 ret = swprintf(nbuf, (sizeof(nbuf) / sizeof(*nbuf)), L"%i", c);
3201 bufcat(buf, nbuf, ret);
3202 addtobuf(buf, L';');
3203 } else {
3204 for(ent = entities; ent->ent != NULL; ent++)
3205 {
3206 if(ent->c == *src)
3207 {
3208 bufcat(buf, ent->ent, wcslen(ent->ent));
3209 break;
3210 }
3211 }
3212 if(ent->ent == NULL)
3213 addtobuf(buf, *src);
3214 }
3215 }
3216 addtobuf(buf, L'\0');
3217 return(buf);
3218}
3219
3220static void updatexmllist(void)
3221{
3222 int i, fd, lev;
3223 FILE *fs;
3224 char cidbuf[14], *namebuf;
3225 char *hashbuf;
3226 struct sharecache *node;
3227
3228 if(xmllistname != NULL)
3229 {
3230 unlink(xmllistname);
3231 free(xmllistname);
3232 }
3233 xmllistname = sstrdup("/tmp/dc-filelist-dcxml-XXXXXX");
3234 if((fd = mkstemp(xmllistname)) < 0)
3235 {
3236 flog(LOG_WARNING, "could not create XML file list tempfile: %s", strerror(errno));
3237 free(xmllistname);
3238 xmllistname = NULL;
3239 return;
3240 }
3241 if((fs = fdopen(fd, "w")) == NULL)
3242 {
3243 flog(LOG_WARNING, "could not fdopen XML list fd %i: %s", fd, strerror(errno));
3244 unlink(xmllistname);
3245 free(xmllistname);
3246 xmllistname = NULL;
3247 close(fd);
3248 return;
3249 }
3250 fprintf(fs, "<?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"yes\"?>\r\n");
3251 for(i = 0; i < sizeof(cidbuf) - 1; i++)
3252 cidbuf[i] = (rand() % ('Z' - 'A' + 1)) + 'A';
3253 cidbuf[i] = 0;
3254 fprintf(fs, "<FileListing Version=\"1\" CID=\"%s\" Base=\"/\" Generator=\"%s\">\r\n", cidbuf, DCIDFULL);
3255
3256 node = shareroot->child;
3257 lev = 0;
3258 while(1)
3259 {
3260 if((namebuf = icswcstombs(escapexml(node->name), "UTF-8", NULL)) != NULL)
3261 {
3262 for(i = 0; i < lev; i++)
3263 fputc('\t', fs);
3264 if(node->child != NULL)
3265 {
3266 fprintf(fs, "<Directory Name=\"%s\">\r\n", namebuf);
3267 node = node->child;
3268 lev++;
3269 continue;
3270 } else {
3271 fprintf(fs, "<File Name=\"%s\" Size=\"%i\"", namebuf, node->size);
3272 if(node->f.b.hastth)
3273 {
3274 hashbuf = base32encode(node->hashtth, 24);
3275 fprintf(fs, " TTH=\"%.39s\"", hashbuf);
3276 free(hashbuf);
3277 }
3278 fprintf(fs, "/>\r\n");
3279 }
3280 while(node->next == NULL)
3281 {
3282 node = node->parent;
3283 if(node == shareroot)
3284 {
3285 break;
3286 } else {
3287 lev--;
3288 for(i = 0; i < lev; i++)
3289 fputc('\t', fs);
3290 fprintf(fs, "</Directory>\r\n");
3291 }
3292 }
3293 if(node == shareroot)
3294 break;
3295 node = node->next;
3296 }
3297 }
3298
3299#ifdef DCPP_MASQUERADE
3300 fprintf(fs, "</FileListing>");
3301#else
3302 fprintf(fs, "</FileListing>\r\n");
3303#endif
3304 fclose(fs);
3305}
3306
3307static void updatexmlbz2list(void)
3308{
3309 int err, fd;
3310 FILE *in;
3311 FILE *real;
3312 BZFILE *out;
3313 char buf[1024];
3314 size_t bufdata;
3315
3316 if(xmllistname == NULL)
3317 return;
3318 if((in = fopen(xmllistname, "r")) == NULL)
3319 {
3320 flog(LOG_WARNING, "could not open XML file list for bzipping: %s", strerror(errno));
3321 return;
3322 }
3323 if(xmlbz2listname != NULL)
3324 {
3325 unlink(xmlbz2listname);
3326 free(xmlbz2listname);
3327 }
3328 xmlbz2listname = sstrdup("/tmp/dc-filelist-dcxmlbz2-XXXXXX");
3329 if((fd = mkstemp(xmlbz2listname)) < 0)
3330 {
3331 flog(LOG_WARNING, "could not create bzipped XML file list tempfile: %s", strerror(errno));
3332 free(xmlbz2listname);
3333 xmlbz2listname = NULL;
3334 fclose(in);
3335 return;
3336 }
3337 if((real = fdopen(fd, "w")) == NULL)
3338 {
3339 flog(LOG_WARNING, "could not fdopen bzipped XML list fd %i: %s", fd, strerror(errno));
3340 close(fd);
3341 unlink(xmlbz2listname);
3342 free(xmlbz2listname);
3343 xmlbz2listname = NULL;
3344 fclose(in);
3345 return;
3346 }
3347 out = BZ2_bzWriteOpen(&err, real, 9, 0, 0);
3348 if(err != BZ_OK)
3349 {
3350 flog(LOG_WARNING, "could not open bzip2 stream from XML list");
3351 fclose(real);
3352 unlink(xmlbz2listname);
3353 free(xmlbz2listname);
3354 xmlbz2listname = NULL;
3355 fclose(in);
3356 return;
3357 }
3358 while(!feof(in))
3359 {
3360 bufdata = fread(buf, 1, sizeof(buf), in);
3361 BZ2_bzWrite(&err, out, buf, bufdata);
3362 }
3363 fclose(in);
3364 BZ2_bzWriteClose(&err, out, 0, NULL, NULL);
3365 fclose(real);
3366}
3367
3368static int shareupdate(unsigned long long uusharesize, void *data)
3369{
3370 updatehmlist();
3371 updatexmllist();
3372 updatexmlbz2list();
3373 return(0);
3374}
3375
3376static void dispatchcommand(struct qcommand *qcmd, struct command *cmdlist, struct socket *sk, void *data)
3377{
3378 char *p;
3379 struct command *cmd;
3380
3381 if((p = strchr(qcmd->string, ' ')) != NULL)
3382 *(p++) = 0;
3383 for(cmd = cmdlist; cmd->handler != NULL; cmd++)
3384 {
3385 if(!strcmp(cmd->name, qcmd->string))
3386 break;
3387 }
3388 if(cmd->handler != NULL)
3389 cmd->handler(sk, data, qcmd->string, p);
3390/*
3391 else
3392 flog(LOG_DEBUG, "Unimplemented DC command: %s \"%s\"", qcmd->string, p?p:"noargs");
3393*/
3394}
3395
3396static int run(void)
3397{
3398 struct fnetnode *fn, *nextfn;
3399 struct dchub *hub;
3400 struct dcpeer *peer, *nextpeer;
3401 struct qcommand *qcmd;
3402 int ret;
3403
3404 ret = 0;
3405 for(fn = fnetnodes; fn != NULL; fn = nextfn)
3406 {
3407 nextfn = fn->next;
3408 if(fn->fnet != &dcnet)
3409 continue;
3410 if(fn->data == NULL)
3411 continue;
3412 hub = (struct dchub *)fn->data;
3413 if((qcmd = ulqcmd(&hub->queue)) != NULL)
3414 {
3415 if(*qcmd->string == '$')
3416 {
3417 if((fn->sk != NULL) && (fn->sk->state == SOCK_EST))
3418 dispatchcommand(qcmd, hubcmds, fn->sk, fn);
3419 } else if(*qcmd->string != 0) {
3420 hubrecvchat(fn->sk, fn, NULL, qcmd->string);
3421 }
3422 freeqcmd(qcmd);
3423 ret = 1;
3424 break;
3425 }
3426 }
3427 for(peer = peers; peer != NULL; peer = nextpeer)
3428 {
3429 nextpeer = peer->next;
3430 if((qcmd = ulqcmd(&peer->queue)) != NULL)
3431 {
3432 if(*qcmd->string == '$')
3433 dispatchcommand(qcmd, peercmds, peer->sk, peer);
3434 freeqcmd(qcmd);
3435 ret = 1;
3436 break;
3437 }
3438 }
3439 return(ret);
3440}
3441
3442static void preinit(int hup)
3443{
3444 if(hup)
3445 return;
3446 regfnet(&dcnet);
3447}
3448
3449static int updateudpport(struct configvar *var, void *uudata)
3450{
3451 struct sockaddr_in addr;
3452 struct socket *newsock;
3453
3454 memset(&addr, 0, sizeof(addr));
3455 addr.sin_family = AF_INET;
3456 addr.sin_port = htons(var->val.num);
3457 if((newsock = netcsdgram((struct sockaddr *)&addr, sizeof(addr))) == NULL)
3458 {
3459 flog(LOG_WARNING, "could not create new DC UDP socket, reverting to old: %s", strerror(errno));
3460 return(0);
3461 }
3462 newsock->readcb = udpread;
3463 if(udpsock != NULL)
3464 putsock(udpsock);
3465 udpsock = newsock;
3466 return(0);
3467}
3468
3469static int updatetcpport(struct configvar *var, void *uudata)
3470{
3471 struct sockaddr_in addr;
3472 struct socket *newsock;
3473
3474 memset(&addr, 0, sizeof(addr));
3475 addr.sin_family = AF_INET;
3476 addr.sin_port = htons(var->val.num);
3477 if((newsock = netcslisten(SOCK_STREAM, (struct sockaddr *)&addr, sizeof(addr), peeraccept, NULL)) == NULL)
3478 flog(LOG_INFO, "could not listen to a remote address, going into passive mode");
3479 if(tcpsock != NULL)
3480 putsock(tcpsock);
3481 tcpsock = newsock;
3482 return(0);
3483}
3484
3485static int init(int hup)
3486{
3487 struct sockaddr_in addr;
3488
3489 if(!hup)
3490 {
3491 GCBREG(sharechangecb, shareupdate, NULL);
3492 if(udpsock != NULL)
3493 putsock(udpsock);
3494 if(tcpsock != NULL)
3495 putsock(tcpsock);
3496 addr.sin_family = AF_INET;
3497 memset(&addr.sin_addr, 0, sizeof(addr.sin_addr));
3498 addr.sin_port = htons(confgetint("dc", "udpport"));
3499 if((udpsock = netcsdgram((struct sockaddr *)&addr, sizeof(addr))) == NULL)
3500 {
3501 flog(LOG_CRIT, "could not create DC UDP socket: %s", strerror(errno));
3502 return(1);
3503 }
3504 udpsock->readcb = udpread;
3505 addr.sin_port = htons(confgetint("dc", "tcpport"));
3506 if((tcpsock = netcslisten(SOCK_STREAM, (struct sockaddr *)&addr, sizeof(addr), peeraccept, NULL)) == NULL)
3507 flog(LOG_INFO, "could not listen to a remote address, going into passive mode");
3508 CBREG(confgetvar("dc", "udpport"), conf_update, updateudpport, NULL, NULL);
3509 CBREG(confgetvar("dc", "tcpport"), conf_update, updatetcpport, NULL, NULL);
3510 CBREG(confgetvar("net", "mode"), conf_update, updatetcpport, NULL, NULL);
3511 }
3512 return(0);
3513}
3514
3515static void terminate(void)
3516{
3517 if(hmlistname != NULL)
3518 {
3519 unlink(hmlistname);
3520 free(hmlistname);
3521 }
3522 if(xmllistname != NULL)
3523 {
3524 unlink(xmllistname);
3525 free(xmllistname);
3526 }
3527 if(xmlbz2listname != NULL)
3528 {
3529 unlink(xmlbz2listname);
3530 free(xmlbz2listname);
3531 }
3532}
3533
3534static struct configvar myvars[] =
3535{
3536 {CONF_VAR_STRING, "desc", {.str = L""}},
3537 {CONF_VAR_STRING, "speedstring", {.str = L"LAN(T1)"}},
3538 {CONF_VAR_STRING, "email", {.str = L"spam@spam.org"}},
3539 {CONF_VAR_INT, "udpport", {.num = 0}},
3540 {CONF_VAR_INT, "tcpport", {.num = 0}},
3541 {CONF_VAR_END}
3542};
3543
3544static struct module me =
3545{
3546 .conf =
3547 {
3548 .vars = myvars
3549 },
3550 .preinit = preinit,
3551 .init = init,
3552 .run = run,
3553 .terminate = terminate,
3554 .name = "dc"
3555};
3556
3557MODULE(me)
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