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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;
fcd0627b 109 int extended;
d3372da9 110 char *nativename;
111 char *nativenick;
112};
113
114struct dcexppeer
115{
116 struct dcexppeer *next, *prev;
117 char *nick;
118 struct fnetnode *fn;
119 struct timer *expire;
120};
121
122struct dcpeer
123{
124 struct dcpeer *next, *prev;
125 struct socket *sk;
126 struct fnetnode *fn;
127 char *inbuf;
128 size_t inbufdata, inbufsize;
9a2d6cb8 129 size_t curread, totalsize;
d3372da9 130 int freeing;
131 struct qcommand *queue;
132 struct transfer *transfer;
133 int state;
134 int ptclose; /* Close after transfer is complete */
135 int accepted; /* If false, we connected, otherwise, we accepted */
136 int extended;
137 int direction; /* Using the constants from transfer.h */
138 int compress;
9a2d6cb8 139 int hascurpos, notthl;
140 struct tigertreehash tth;
d3372da9 141 void *cprsdata;
d3372da9 142 char *key;
143 char *nativename;
144 char **supports;
145 wchar_t *wcsname;
146};
147
148static struct fnet dcnet;
149static struct transferiface dctransfer;
150static struct socket *udpsock = NULL;
151static struct socket *tcpsock = NULL;
152static struct dcpeer *peers = NULL;
153int numdcpeers = 0;
154static struct dcexppeer *expected = NULL;
155static char *hmlistname = NULL;
156static char *xmllistname = NULL;
157static char *xmlbz2listname = NULL;
158
159static void peerconnect(struct socket *sk, int err, struct fnetnode *fn);
160static void freedcpeer(struct dcpeer *peer);
161static void transread(struct socket *sk, struct dcpeer *peer);
162static void transerr(struct socket *sk, int err, struct dcpeer *peer);
163static void transwrite(struct socket *sk, struct dcpeer *peer);
164static void updatehmlist(void);
165static void updatexmllist(void);
166static void updatexmlbz2list(void);
9a2d6cb8 167static void requestfile(struct dcpeer *peer);
d3372da9 168
169static int reservedchar(unsigned char c)
170{
171 return((c == 0) || (c == 5) || (c == 124) || (c == 96) || (c == 126) || (c == 36));
172}
173
174/* Oh, how I despise having to do this... */
175static char *dcmakekey(char *lock)
176{
177 int i, len, offset;
178 char *buf, *key;
179 char save;
180
181 buf = smalloc(strlen(lock));
182 save = 5;
183 len = 0;
184 for(i = 0; lock[i]; i++)
185 {
186 buf[i] = lock[i] ^ save;
187 buf[i] = ((buf[i] & 0x0F) << 4) | ((buf[i] & 0xF0) >> 4);
188 save = lock[i];
189 if((i != 0) && reservedchar(buf[i]))
190 len += 10;
191 else
192 len++;
193 }
194 buf[0] ^= buf[i - 1];
195 if(reservedchar(buf[0]))
196 len += 10;
197 else
198 len++;
199 key = smalloc(len + 1);
200 offset = 0;
201 for(i = 0; lock[i] != 0; i++)
202 {
203 if(reservedchar(buf[i]))
204 offset += sprintf(key + offset, "/%%DCN%03i%%/", buf[i]);
205 else
206 key[offset++] = buf[i];
207 }
208 key[offset] = 0;
209 free(buf);
210 return(key);
211}
212
9a2d6cb8 213static char *pathnmdc2adc(char *path)
214{
215 char *ret;
216 size_t retsize, retdata;
217
218 if(!strcmp(path, "files.xml") || !strcmp(path, "files.xml.bz2") || !strcmp(path, "MyList.DcLst"))
219 return(sstrdup(path));
220 ret = NULL;
221 retsize = retdata = 0;
222 addtobuf(ret, '/');
223 for(; *path; path++)
224 {
225 if(*path == '\\')
226 addtobuf(ret, '/');
227 else
228 addtobuf(ret, *path);
229 }
230 addtobuf(ret, 0);
231 return(ret);
232}
233
234static int isdchash(struct hash *hash)
235{
236 if(wcscmp(hash->algo, L"TTH"))
237 return(0);
238 if(hash->len != 24)
239 return(0);
240 return(1);
241}
242
243static int supports(struct dcpeer *peer, char *cap)
244{
245 char **p;
246
247 if(peer->supports == NULL)
248 return(0);
249 for(p = peer->supports; *p != NULL; p++)
250 {
251 if(!strcasecmp(*p, cap))
252 return(1);
253 }
254 return(0);
255}
256
d3372da9 257static void endcompress(struct dcpeer *peer)
258{
259 if(peer->compress == CPRS_ZLIB)
260 {
261 deflateEnd(peer->cprsdata);
262 free(peer->cprsdata);
263 }
264 peer->compress = CPRS_NONE;
265}
266
267static void initcompress(struct dcpeer *peer, int algo)
268{
269 int ret;
270
271 endcompress(peer);
272 peer->compress = algo;
273 if(algo == CPRS_ZLIB)
274 {
275 peer->cprsdata = smalloc(sizeof(z_stream));
276 memset(peer->cprsdata, 0, sizeof(z_stream));
277 if((ret = deflateInit(peer->cprsdata, 3)) != Z_OK)
278 {
279 flog(LOG_CRIT, "Aiya! zlib refuses to init (%i)!", ret);
280 abort();
281 }
282 }
283}
284
285static void unquote(wchar_t *in)
286{
287 wchar_t *p, *p2, nc;
288
289 for(p = in; *p != L'\0'; p++)
290 {
291 if(*p == L'&')
292 {
293 for(p2 = p + 1; (*p2 != L'\0') && (*p2 != L';') && (*p2 != L'&'); p2++);
294 if(*p2 == L'&')
295 continue;
296 if(*p2 == L'\0')
297 return;
298 *p2 = L'\0';
299 nc = L'\0';
300 if(!wcscmp(p + 1, L"amp"))
301 {
302 nc = L'&';
303 } else if(p[1] == L'#') {
304 nc = ucptowc(wcstol(p + 2, NULL, 10));
305 }
306 if(nc == L'\0')
307 {
308 *p2 = L';';
309 p = p2;
310 continue;
311 }
312 *p = nc;
313 memmove(p + 1, p2 + 1, (wcslen(p2 + 1) + 1) * sizeof(wchar_t));
314 }
315 }
316}
317
318static void freeexppeer(struct dcexppeer *ep)
319{
320 if(ep->next != NULL)
321 ep->next->prev = ep->prev;
322 if(ep->prev != NULL)
323 ep->prev->next = ep->next;
324 if(ep == expected)
325 expected = ep->next;
326 free(ep->nick);
327 putfnetnode(ep->fn);
328 if(ep->expire != NULL)
329 canceltimer(ep->expire);
330 free(ep);
331}
332
333static void exppeerexpire(int cancelled, struct dcexppeer *ep)
334{
335 ep->expire = NULL;
336 if(!cancelled)
337 freeexppeer(ep);
338}
339
340static struct dcexppeer *expectpeer(char *nick, struct fnetnode *fn)
341{
342 struct dcexppeer *ep;
343
344 ep = smalloc(sizeof(*ep));
345 ep->nick = sstrdup(nick);
346 getfnetnode(ep->fn = fn);
347 ep->expire = timercallback(ntime() + 300, (void (*)(int, void *))exppeerexpire, ep);
348 ep->next = expected;
349 ep->prev = NULL;
350 if(expected != NULL)
351 expected->prev = ep;
352 expected = ep;
353 return(ep);
354}
355
356static struct qcommand *newqcmd(struct qcommand **queue, char *string)
357{
358 struct qcommand *new;
359
360 while(*queue != NULL)
361 queue = &(*queue)->next;
362 new = smalloc(sizeof(*new));
363 new->string = sstrdup(string);
364 new->next = *queue;
365 *queue = new;
366 return(new);
367}
368
369static struct qcommand *ulqcmd(struct qcommand **queue)
370{
371 struct qcommand *qcmd;
372
373 if((qcmd = *queue) == NULL)
374 return(NULL);
375 *queue = qcmd->next;
376 return(qcmd);
377}
378
379static void freeqcmd(struct qcommand *qcmd)
380{
381 free(qcmd->string);
382 free(qcmd);
383}
384
385static void hubrecvchat(struct socket *sk, struct fnetnode *fn, char *from, char *string)
386{
387 wchar_t *chat, *wfrom, *wpeer;
388 char *p, *end;
389 struct fnetpeer *peer;
390
391 end = string + strlen(string);
392 while((p = strchr(string, 13)) != NULL)
393 memmove(p, p + 1, (end-- - p));
394 if(from != NULL)
395 {
396 if((strlen(string) > strlen(from) + 2) && (*string == '<') && !memcmp(string + 1, from, strlen(from)) && (*(string + strlen(from) + 1) == '>'))
397 string += strlen(from) + 2;
398 if((wfrom = icmbstowcs(from, DCCHARSET)) == NULL)
399 return;
400 wpeer = swcsdup(wfrom);
401 } else {
402 wfrom = NULL;
403 wpeer = NULL;
404 if(*string == '<')
405 {
406 for(p = string + 1; *p; p++)
407 {
408 if((*p == ' ') || (*p == '>'))
409 break;
410 }
411 if(*p == '>')
412 {
413 *(p++) = 0;
414 if(*p == ' ')
415 p++;
416 if((wpeer = icmbstowcs(string + 1, DCCHARSET)) == NULL)
417 return;
418 string = p;
419 }
420 }
421 if(wpeer == NULL)
422 wpeer = swcsdup(L"");
423 }
424 if((chat = icmbstowcs(string, DCCHARSET)) == NULL)
425 {
426 if(wfrom != NULL)
427 free(wfrom);
428 free(wpeer);
429 return;
430 }
431 unquote(chat);
432 if(wfrom != NULL)
433 {
434 if((peer = fnetfindpeer(fn, wfrom)) == NULL) /* Assume public chat */
435 fnethandlechat(fn, 1, wfrom, wpeer, chat);
436 else
437 fnethandlechat(fn, 0, wfrom, wpeer, chat);
438 } else {
439 fnethandlechat(fn, 1, L"", wpeer, chat);
440 }
441 if(wfrom != NULL)
442 free(wfrom);
443 free(wpeer);
444 free(chat);
445}
446
447static void sendadc(struct socket *sk, char *arg)
448{
449 char *buf;
450 size_t bufsize, bufdata;
451
452 buf = NULL;
453 bufsize = bufdata = 0;
454 addtobuf(buf, ' ');
455 for(; *arg; arg++)
456 {
457 if(*arg == ' ')
458 {
459 bufcat(buf, "\\s", 2);
460 } else if(*arg == '\n') {
461 bufcat(buf, "\\n", 2);
462 } else if(*arg == '\\') {
463 bufcat(buf, "\\\\", 2);
464 } else {
465 addtobuf(buf, *arg);
466 }
467 }
468 sockqueue(sk, buf, bufdata);
469 free(buf);
470}
471
472static void sendadcf(struct socket *sk, char *arg, ...)
473{
474 char *buf;
475 va_list args;
476
477 va_start(args, arg);
478 buf = vsprintf2(arg, args);
479 va_end(args);
480 if(buf == NULL)
481 return;
482 sendadc(sk, buf);
483 free(buf);
484}
485
486static char **parseadc(char *args)
487{
488 char **retbuf;
489 size_t retbufsize, retbufdata;
490 char *buf;
491 size_t bufsize, bufdata;
492 int state;
493
494 retbuf = NULL;
495 buf = NULL;
496 retbufsize = retbufdata = bufsize = bufdata = 0;
497 state = 0;
498 while(state != 3)
499 {
500 switch(state)
501 {
502 case 0:
503 if(*args == 0)
504 state = 3;
505 else if(*args != ' ')
506 state = 1;
507 break;
508 case 1:
509 if((*args == ' ') || (*args == 0))
510 {
511 addtobuf(buf, 0);
512 addtobuf(retbuf, buf);
513 buf = NULL;
514 bufsize = bufdata = 0;
515 if(*args == 0)
516 state = 3;
517 } else if(*args == '\\') {
518 state = 2;
519 } else {
520 addtobuf(buf, *args);
521 }
522 args++;
523 break;
524 case 2:
525 if(*args == 0)
526 {
527 if(buf != NULL)
528 free(buf);
529 addtobuf(retbuf, NULL);
530 freeparr(retbuf);
531 return(NULL);
f24d5cfb 532 } else if((*args == 's') || (*args == ' ')) {
d3372da9 533 addtobuf(buf, ' ');
534 } else if(*args == 'n') {
535 addtobuf(buf, '\n');
536 } else if(*args == '\\') {
537 addtobuf(buf, '\\');
538 }
a478552c 539 args++;
d3372da9 540 state = 1;
a478552c 541 break;
d3372da9 542 }
543 }
544 if(buf != NULL)
545 free(buf);
546 addtobuf(retbuf, NULL);
547 return(retbuf);
548}
549
550/* Macros useful in command handlers */
551#define skipspace(s) ({if(((s) = strchr((s), ' ')) == NULL) return; else (s)++;})
552#define qstr(sk, str) sockqueue(sk, str, strlen(str))
553#define qstrf(sk, strandargs...) \
554do { \
555 char *__buf__; \
556 if((__buf__ = sprintf2(strandargs)) != NULL) { \
557 sockqueue(sk, __buf__, strlen(__buf__)); \
558 free(__buf__); \
559 } \
560} while(0)
561
562static char *tr(char *str, char *trans)
563{
564 char *p;
565
566 for(; *trans; trans += 2)
567 {
568 for(p = strchr(str, trans[0]); p != NULL; p = strchr(p, trans[0]))
569 *p = trans[1];
570 }
571 return(str);
572}
573
9a2d6cb8 574static char *getadcid(struct dcpeer *peer)
575{
576 char *buf;
577 char *ret;
d57f938a 578 int isfilelist;
9a2d6cb8 579
d57f938a 580 if(!wcscmp(peer->transfer->path, L"files.xml") || !wcscmp(peer->transfer->path, L"files.xml.bz2") || !wcscmp(peer->transfer->path, L"MyList.DcLst"))
581 isfilelist = 1;
582 if(!isfilelist && (peer->transfer->hash != NULL) && isdchash(peer->transfer->hash) && supports(peer, "tthf"))
9a2d6cb8 583 {
584 buf = base32encode(peer->transfer->hash->buf, 24);
585 ret = sprintf2("TTH/%.39s", buf);
586 free(buf);
587 } else {
588 if((buf = icwcstombs(peer->transfer->path, "UTF-8")) == NULL)
589 return(NULL);
590 ret = pathnmdc2adc(buf);
591 free(buf);
592 }
593 return(ret);
594}
595
596
d3372da9 597static int trresumecb(struct transfer *transfer, wchar_t *cmd, wchar_t *arg, struct dcpeer *peer)
598{
599 if(!wcscmp(cmd, L"resume"))
600 {
601 if(arg == NULL)
602 {
603 flog(LOG_WARNING, "filter returned no position for \"resume\" on transfer %i", transfer->id);
604 freedcpeer(peer);
605 } else {
606 transfer->curpos = wcstol(arg, NULL, 10);
9a2d6cb8 607 peer->hascurpos = 1;
608 requestfile(peer);
d3372da9 609 }
d3372da9 610 return(1);
611 }
612 return(0);
613}
614
9a2d6cb8 615static void sendmynick(struct dcpeer *peer)
d3372da9 616{
617 struct dchub *hub;
d3372da9 618
9a2d6cb8 619 hub = (peer->fn == NULL)?NULL:(peer->fn->data);
620 if(hub == NULL)
621 qstrf(peer->sk, "$MyNick %s|", icswcstombs(confgetstr("cli", "defnick"), DCCHARSET, "DoldaConnectUser-IN"));
622 else
623 qstrf(peer->sk, "$MyNick %s|", hub->nativenick);
624}
625
626static void sendpeerlock(struct dcpeer *peer)
627{
628#ifdef DCPP_MASQUERADE
629 qstrf(peer->sk, "$Lock EXTENDEDPROTOCOLABCABCABCABCABCABC Pk=DCPLUSPLUS0.674ABCABC|");
630#else
631 qstrf(peer->sk, "$Lock EXTENDEDPROTOCOLABCABCABCABCABCABC Pk=DOLDA%sABCABCABC|", VERSION);
632#endif
633}
634
635static void sendsupports(struct dcpeer *peer)
636{
637#ifdef DCPP_MASQUERADE
638 qstr(peer->sk, "$Supports MiniSlots XmlBZList ADCGet TTHL TTHF GetZBlock ZLIG |");
639#else
640 qstr(peer->sk, "$Supports MiniSlots XmlBZList ADCGet TTHL TTHF GetZBlock ZLIG|");
641#endif
642}
643
644static void requestfile(struct dcpeer *peer)
645{
646 char *buf;
647
648 if(peer->transfer->size == -1)
d3372da9 649 {
9a2d6cb8 650 if((buf = icswcstombs(peer->transfer->path, DCCHARSET, NULL)) == NULL)
d3372da9 651 {
9a2d6cb8 652 transferseterror(peer->transfer, TRNSE_NOTFOUND);
653 freedcpeer(peer);
d3372da9 654 return;
655 }
9a2d6cb8 656 /* The transfer will be restarted later from
657 * cmd_filelength when it detects that the sizes
658 * don't match. */
659 qstrf(peer->sk, "$Get %s$1|", buf);
660 return;
d3372da9 661 }
9a2d6cb8 662 if((peer->transfer->hash == NULL) && !peer->notthl)
d3372da9 663 {
9a2d6cb8 664 if(supports(peer, "adcget") && supports(peer, "tthl"))
d3372da9 665 {
9a2d6cb8 666 qstr(peer->sk, "$ADCGET");
667 sendadc(peer->sk, "tthl");
668 if((buf = getadcid(peer)) == NULL)
d3372da9 669 {
9a2d6cb8 670 transferseterror(peer->transfer, TRNSE_NOTFOUND);
d3372da9 671 freedcpeer(peer);
672 return;
673 }
9a2d6cb8 674 sendadc(peer->sk, buf);
675 free(buf);
676 sendadc(peer->sk, "0");
677 sendadc(peer->sk, "-1");
678 qstr(peer->sk, "|");
679 return;
680 }
681 }
682 if(!peer->hascurpos)
683 {
684 if(forkfilter(peer->transfer))
685 {
686 flog(LOG_WARNING, "could not fork filter for transfer %i: %s", peer->transfer->id, strerror(errno));
687 freedcpeer(peer);
688 return;
d3372da9 689 }
9a2d6cb8 690 CBREG(peer->transfer, trans_filterout, (int (*)(struct transfer *, wchar_t *, wchar_t *, void *))trresumecb, NULL, peer);
691 return;
692 }
693 if(supports(peer, "adcget"))
694 {
695 qstr(peer->sk, "$ADCGET");
696 sendadc(peer->sk, "file");
697 if((buf = getadcid(peer)) == NULL)
698 {
699 transferseterror(peer->transfer, TRNSE_NOTFOUND);
700 freedcpeer(peer);
701 return;
702 }
703 sendadc(peer->sk, buf);
704 free(buf);
705 sendadcf(peer->sk, "%i", peer->transfer->curpos);
706 sendadcf(peer->sk, "%i", peer->transfer->size - peer->transfer->curpos);
707 qstr(peer->sk, "|");
708 } else if(supports(peer, "xmlbzlist")) {
709 if((buf = icswcstombs(peer->transfer->path, "UTF-8", NULL)) == NULL)
710 {
711 transferseterror(peer->transfer, TRNSE_NOTFOUND);
712 freedcpeer(peer);
713 return;
714 }
715 qstrf(peer->sk, "$UGetBlock %i %i %s|", peer->transfer->curpos, peer->transfer->size - peer->transfer->curpos, buf);
d3372da9 716 } else {
9a2d6cb8 717 if((buf = icswcstombs(peer->transfer->path, DCCHARSET, NULL)) == NULL)
d3372da9 718 {
9a2d6cb8 719 transferseterror(peer->transfer, TRNSE_NOTFOUND);
720 freedcpeer(peer);
721 return;
d3372da9 722 }
9a2d6cb8 723 qstrf(peer->sk, "$Get %s$%i|", buf, peer->transfer->curpos + 1);
d3372da9 724 }
725}
726
727static void sendmyinfo(struct socket *sk, struct fnetnode *fn)
728{
729 struct dchub *hub;
730 char *buf;
731 struct fnetnode *cfn;
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);
fcd0627b 1448 fn->regstatus = FNNS_REG;
48509089 1449 hubhandleaction(sk, fn, cmd, args);
1450}
1451
c9b3ad74 1452static void cmd_logedin(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
1453{
1454 struct dchub *hub;
1455
1456 hub = fn->data;
fcd0627b 1457 fn->regstatus = FNNS_OP;
c9b3ad74 1458 hubhandleaction(sk, fn, cmd, args);
1459}
1460
d3372da9 1461static void cmd_mynick(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1462{
9a2d6cb8 1463 struct dcexppeer *expect;
1464
d3372da9 1465 if(peer->nativename != NULL)
1466 free(peer->nativename);
1467 peer->nativename = sstrdup(args);
1468 if(peer->wcsname != NULL)
1469 free(peer->wcsname);
1470 if((peer->wcsname = icmbstowcs(peer->nativename, DCCHARSET)) == NULL)
1471 {
1472 freedcpeer(peer);
1473 return;
1474 }
9a2d6cb8 1475 if(peer->accepted)
1476 {
1477 for(expect = expected; expect != NULL; expect = expect->next)
1478 {
1479 if(!strcmp(expect->nick, args))
1480 break;
1481 }
1482 if(expect == NULL)
1483 {
1484 peer->fn = NULL;
1485 } else {
1486 peer->fn = expect->fn;
1487 getfnetnode(peer->fn);
1488 freeexppeer(expect);
1489 }
1490 }
d3372da9 1491}
1492
1493static void cmd_direction(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1494{
1495 char *p;
9a2d6cb8 1496 int mydir;
1497 struct transfer *transfer;
d3372da9 1498
1499 if((p = strchr(args, ' ')) == NULL)
1500 return;
1501 *p = 0;
1502 if(!strcmp(args, "Upload"))
9a2d6cb8 1503 mydir = TRNSD_DOWN;
d3372da9 1504 if(!strcmp(args, "Download"))
9a2d6cb8 1505 mydir = TRNSD_UP;
1506 if(peer->accepted)
1507 {
1508 if((peer->transfer == NULL) || (mydir != peer->direction))
1509 {
1510 freedcpeer(peer);
1511 return;
1512 }
1b14d3d8 1513 if(peer->direction == TRNSD_DOWN)
1514 requestfile(peer);
9a2d6cb8 1515 } else {
1516 if(peer->wcsname == NULL)
1517 {
1518 freedcpeer(peer);
1519 return;
1520 }
1521 peer->direction = mydir;
1522 if(peer->direction == TRNSD_UP)
1523 {
1524 transfer = newupload(peer->fn, &dcnet, peer->wcsname, &dctransfer, peer);
1525 } else {
1526 if((transfer = finddownload(peer->wcsname)) == NULL)
1527 {
1528 freedcpeer(peer);
1529 return;
1530 }
1531 transferattach(transfer, &dctransfer, peer);
1532 transfersetstate(transfer, TRNS_HS);
1533 }
1534 transfersetnick(transfer, peer->wcsname);
1535 peer->transfer = transfer;
1536 if(peer->extended)
1537 sendsupports(peer);
1538 qstrf(sk, "$Direction %s %i|", (peer->direction == TRNSD_UP)?"Upload":"Download", rand() % 10000);
1539 if(peer->key != NULL)
1540 qstrf(sk, "$Key %s|", peer->key);
1541 if(peer->direction == TRNSD_DOWN)
1542 requestfile(peer);
1543 }
d3372da9 1544}
1545
1546static void cmd_peerlock(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1547{
9a2d6cb8 1548 char *p, *key;
1549 struct transfer *transfer;
d3372da9 1550
1551 if((p = strchr(args, ' ')) == NULL)
1552 return;
1553 *p = 0;
1554 if(!strncmp(args, "EXTENDEDPROTOCOL", 16))
1555 peer->extended = 1;
9a2d6cb8 1556 key = dcmakekey(args);
1557 if(peer->accepted)
1558 {
1559 if(peer->wcsname == NULL)
1560 {
1561 freedcpeer(peer);
1562 return;
1563 }
1564 sendmynick(peer);
1565 sendpeerlock(peer);
1566 if(peer->extended)
1567 sendsupports(peer);
1568 if((transfer = finddownload(peer->wcsname)) == NULL)
1569 {
1570 peer->direction = TRNSD_UP;
1571 transfer = newupload(peer->fn, &dcnet, peer->wcsname, &dctransfer, peer);
1572 } else {
1573 peer->direction = TRNSD_DOWN;
1574 transferattach(transfer, &dctransfer, peer);
1575 transfersetstate(transfer, TRNS_HS);
1576 }
1577 transfersetnick(transfer, peer->wcsname);
1578 peer->transfer = transfer;
1579 qstrf(sk, "$Direction %s %i|", (peer->direction == TRNSD_UP)?"Upload":"Download", rand() % 10000);
1580 qstrf(sk, "$Key %s|", key);
1581 } else {
1582 if(peer->key != NULL)
1583 free(peer->key);
1584 peer->key = key;
1585 }
d3372da9 1586}
1587
1588static void cmd_key(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1589{
9a2d6cb8 1590 /* NOP */
1591}
1592
1593static void startdl(struct dcpeer *peer)
1594{
1595 peer->state = PEER_TRNS;
1596 transferstartdl(peer->transfer, peer->sk);
1597 peer->sk->readcb = (void (*)(struct socket *, void *))transread;
1598 peer->sk->errcb = (void (*)(struct socket *, int, void *))transerr;
1599}
1600
1601static void startul(struct dcpeer *peer)
1602{
1603 peer->state = PEER_TRNS;
1604 transferstartul(peer->transfer, peer->sk);
1605 peer->sk->writecb = (void (*)(struct socket *, void *))transwrite;
d3372da9 1606}
1607
1608static void cmd_filelength(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1609{
1610 int size;
1611
1612 if(peer->transfer == NULL)
1613 {
1614 freedcpeer(peer);
1615 return;
1616 }
1617 size = atoi(args);
9a2d6cb8 1618 if(peer->transfer->size != size)
d3372da9 1619 {
d3372da9 1620 transfersetsize(peer->transfer, size);
1621 freedcpeer(peer);
1622 return;
1623 }
9a2d6cb8 1624 startdl(peer);
1625 qstr(peer->sk, "$Send|");
d3372da9 1626}
1627
1628static void cmd_error(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1629{
1630 if((peer->transfer != NULL) && (peer->transfer->dir == TRNSD_DOWN))
1631 {
1632 transferseterror(peer->transfer, TRNSE_NOTFOUND);
1633 resettransfer(peer->transfer);
1634 return;
1635 }
1636 freedcpeer(peer);
1637}
1638
1639static void cmd_maxedout(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1640{
1641 if((peer->transfer != NULL) && (peer->transfer->dir == TRNSD_DOWN))
1642 {
1643 transferseterror(peer->transfer, TRNSE_NOSLOTS);
1644 resettransfer(peer->transfer);
1645 return;
1646 }
1647 freedcpeer(peer);
1648}
1649
1650static struct
1651{
1652 char *name;
1653 char **file;
1654 void (*func)(void);
1655} lists[] =
1656{
1657 {"MyList.DcLst", &hmlistname, updatehmlist},
1658 {"files.xml", &xmllistname, updatexmllist},
1659 {"files.xml.bz2", &xmlbz2listname, updatexmlbz2list},
1660 {NULL, NULL}
1661};
1662
1663static int openfilelist(char *name)
1664{
1665 int i, fd;
1666 int errnobak;
1667
1668 for(i = 0; lists[i].name != NULL; i++)
1669 {
1670 if(!strcmp(name, lists[i].name))
1671 break;
1672 }
1673 errno = 0;
1674 if(lists[i].name == NULL)
1675 return(-1);
1676 fd = -1;
1677 if((*lists[i].file == NULL) || ((fd = open(*lists[i].file, O_RDONLY)) < 0))
1678 lists[i].func();
1679 if((fd < 0) && ((*lists[i].file == NULL) || ((fd = open(*lists[i].file, O_RDONLY)) < 0)))
1680 {
1681 errnobak = errno;
1682 flog(LOG_ERR, "could not open filelist tempfile: %s", strerror(errno));
1683 errno = errnobak;
1684 return(-1);
1685 }
1686 return(fd);
1687}
1688
1689static struct sharecache *findbytth(char *tth32)
1690{
1691 char *buf;
1692 size_t buflen;
1693 struct sharecache *node;
1694
1695 if((buf = base32decode(tth32, &buflen)) == NULL)
1696 return(NULL);
1697 if(buflen != 24)
1698 {
1699 free(buf);
1700 return(NULL);
1701 }
1702 for(node = shareroot->child; node != NULL; node = nextscnode(node))
1703 {
1704 if(node->f.b.hastth && !memcmp(node->hashtth, buf, 24))
1705 break;
1706 }
1707 free(buf);
1708 return(node);
1709}
1710
1711static struct sharecache *resdcpath(char *path, char *charset, char sep)
1712{
1713 struct sharecache *node;
1714 char *p, *p2;
1715
1716 node = shareroot;
1717 p = path;
1718 while(p != NULL)
1719 {
1720 if((p2 = strchr(p, sep)) != NULL)
1721 *(p2++) = 0;
1722 if((node = findcache(node, icsmbstowcs(p, charset, L""))) == NULL)
1723 return(NULL);
1724 p = p2;
1725 }
1726 return(node);
1727}
1728
1729static void cmd_get(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1730{
1731 int offset;
1732 char *p, *buf;
1733 wchar_t *buf2;
1734 struct sharecache *node;
1735 struct socket *lesk;
1736 int fd;
1737 struct stat sb;
1738
1739 if(peer->transfer == NULL)
1740 {
1741 freedcpeer(peer);
1742 return;
1743 }
1744 if((p = strchr(args, '$')) == NULL)
1745 {
1746 freedcpeer(peer);
1747 return;
1748 }
1749 *(p++) = 0;
1750 if((offset = (atoi(p) - 1)) < 0)
1751 {
1752 freedcpeer(peer);
1753 return;
1754 }
1755 if(((fd = openfilelist(args)) < 0) && (errno != 0))
1756 {
1757 qstr(sk, "$Error Could not send file list|");
1758 freedcpeer(peer);
1759 return;
1760 } else if(fd >= 0) {
1761 if((buf2 = icsmbstowcs(args, DCCHARSET, NULL)) != NULL)
1762 transfersetpath(peer->transfer, buf2);
1763 }
1764 if(fd < 0)
1765 {
1766 if(slotsleft() < 1)
1767 {
1768 qstr(sk, "$MaxedOut|");
1769 freedcpeer(peer);
1770 return;
1771 }
1772 if((node = resdcpath(args, DCCHARSET, '\\')) == NULL)
1773 {
1774 qstrf(sk, "$Error File not in share|");
1775 freedcpeer(peer);
1776 return;
1777 }
1778 if((fd = opensharecache(node)) < 0)
1779 {
1780 qstrf(sk, "$Error %s|", strerror(errno));
1781 freedcpeer(peer);
1782 return;
1783 }
1784 buf = getfspath(node);
1785 if((buf2 = icsmbstowcs(buf, NULL, NULL)) == NULL)
1786 flog(LOG_WARNING, "could not convert native path into a wcs (%s): %s", buf, strerror(errno));
1787 else
1788 transfersetpath(peer->transfer, buf2);
1789 free(buf);
1790 }
1791 if(fstat(fd, &sb) < 0)
1792 {
1793 close(fd);
1794 flog(LOG_WARNING, "could not stat file %ls: %s", node->name, strerror(errno));
1795 qstrf(sk, "$Error|");
1796 freedcpeer(peer);
1797 return;
1798 }
1799 if((offset != 0) && (lseek(fd, offset, SEEK_SET) < 0))
1800 {
1801 close(fd);
1802 qstrf(sk, "$Error Offset out of range|");
1803 freedcpeer(peer);
1804 return;
1805 }
1806 lesk = wrapsock(fd);
1807 transferprepul(peer->transfer, sb.st_size, offset, -1, lesk);
1808 putsock(lesk);
1809 qstrf(sk, "$FileLength %i|", peer->transfer->size);
d3372da9 1810}
1811
1812static void cmd_send(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1813{
1814 if(peer->transfer == NULL)
1815 {
1816 freedcpeer(peer);
1817 return;
1818 }
1819 if(peer->transfer->localend == NULL)
1820 {
1821 freedcpeer(peer);
1822 return;
1823 }
1824 peer->ptclose = 1;
9a2d6cb8 1825 startul(peer);
d3372da9 1826}
1827
1828static void cmd_supports(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1829{
1830 int i;
1831 char *p, *p2;
1832 char **arr;
1833 size_t arrsize, arrdata;
1834
1835 if(peer->supports != NULL)
1836 {
1837 for(i = 0; peer->supports[i] != NULL; i++)
1838 free(peer->supports[i]);
1839 free(peer->supports);
1840 }
1841 arr = NULL;
1842 arrsize = arrdata = 0;
1843 p = args;
1844 do
1845 {
1846 if((p2 = strchr(p, ' ')) != NULL)
1847 *(p2++) = 0;
1848 if(*p == 0)
1849 continue;
1850 addtobuf(arr, sstrdup(p));
1851 } while((p = p2) != NULL);
1852 addtobuf(arr, NULL);
1853 peer->supports = arr;
d3372da9 1854}
1855
1856static void cmd_getblock(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1857{
1858 int fd;
1859 char *p, *p2;
1860 int start, numbytes;
1861 char *charset, *buf;
1862 wchar_t *buf2;
1863 struct sharecache *node;
1864 struct stat sb;
1865 struct socket *lesk;
1866
1867 if(peer->transfer == NULL)
1868 {
1869 freedcpeer(peer);
1870 return;
1871 }
1872 p = args;
1873 if((p2 = strchr(p, ' ')) == NULL)
1874 {
1875 freedcpeer(peer);
1876 return;
1877 }
1878 *(p2++) = 0;
1879 start = atoi(p);
1880 p = p2;
1881 if((p2 = strchr(p, ' ')) == NULL)
1882 {
1883 freedcpeer(peer);
1884 return;
1885 }
1886 *(p2++) = 0;
1887 numbytes = atoi(p);
1888 p = p2;
1889 if(!strcmp(cmd, "$UGetBlock") || !strcmp(cmd, "$UGetZBlock"))
1890 charset = "UTF-8";
1891 else
1892 charset = DCCHARSET;
1893 if(!strcmp(cmd, "$GetZBlock") || !strcmp(cmd, "$UGetZBlock"))
1894 initcompress(peer, CPRS_ZLIB);
1895 if(((fd = openfilelist(p)) < 0) && (errno != 0))
1896 {
1897 qstr(sk, "$Error Could not send file list|");
1898 return;
1899 } else if(fd >= 0) {
1900 if((buf2 = icsmbstowcs(args, charset, NULL)) != NULL)
1901 transfersetpath(peer->transfer, buf2);
1902 }
1903 if(fd < 0)
1904 {
1905 if(slotsleft() < 1)
1906 {
1907 qstr(sk, "$MaxedOut|");
1908 return;
1909 }
1910 if((node = resdcpath(p, charset, '\\')) == NULL)
1911 {
1912 qstr(sk, "$Error File not in cache|");
1913 return;
1914 }
1915 if((fd = opensharecache(node)) < 0)
1916 {
1917 qstrf(sk, "$Error %s|", strerror(errno));
1918 return;
1919 }
1920 buf = getfspath(node);
1921 if((buf2 = icsmbstowcs(buf, NULL, NULL)) == NULL)
1922 flog(LOG_WARNING, "could not convert native path into a wcs (%s): %s", buf, strerror(errno));
1923 else
1924 transfersetpath(peer->transfer, buf2);
1925 free(buf);
1926 }
1927 if(fstat(fd, &sb) < 0)
1928 {
1929 close(fd);
1930 flog(LOG_WARNING, "could not stat file %ls: %s", node->name, strerror(errno));
1931 qstr(sk, "$Error|");
1932 return;
1933 }
1934 if((start != 0) && ((start >= sb.st_size) || (lseek(fd, start, SEEK_SET) < 0)))
1935 {
1936 close(fd);
1937 qstr(sk, "$Error Offset out of range|");
1938 return;
1939 }
1940 if((numbytes < 0) || (start + numbytes > sb.st_size))
1941 numbytes = sb.st_size - start;
1942 lesk = wrapsock(fd);
1943 transferprepul(peer->transfer, sb.st_size, start, start + numbytes, lesk);
1944 putsock(lesk);
1945 qstrf(sk, "$Sending %i|", numbytes);
9a2d6cb8 1946 startul(peer);
d3372da9 1947}
1948
1949static void cmd_adcget(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1950{
1951 int i;
1952 char **argv, *buf;
1953 int start, numbytes;
1954 struct sharecache *node;
1955 struct stat sb;
1956 struct socket *lesk;
1957 wchar_t *wbuf;
1958 int fd;
1959
1960 if(peer->transfer == NULL)
1961 {
1962 freedcpeer(peer);
1963 return;
1964 }
1965 if((argv = parseadc(args)) == NULL)
1966 {
1967 freedcpeer(peer);
1968 return;
1969 }
1970 if(parrlen(argv) < 4)
1971 {
1972 freedcpeer(peer);
1973 goto out;
1974 }
1975 start = atoi(argv[2]);
1976 numbytes = atoi(argv[3]);
1977 node = NULL;
1978 fd = -1;
1979 if(((fd = openfilelist(argv[1])) < 0) && (errno != 0))
1980 {
1981 qstr(sk, "$Error Could not send file list|");
1982 goto out;
1983 } else if(fd >= 0) {
1984 if((wbuf = icsmbstowcs(argv[1], "UTF-8", NULL)) != NULL)
1985 transfersetpath(peer->transfer, wbuf);
1986 }
1987 if(fd < 0)
1988 {
1989 if(slotsleft() < 1)
1990 {
1991 qstr(sk, "$MaxedOut|");
1992 goto out;
1993 }
1994 if(!strncmp(argv[1], "TTH/", 4))
1995 {
1996 if((node = findbytth(argv[1] + 4)) == NULL)
1997 {
1998 qstr(sk, "$Error File not in cache|");
1999 goto out;
2000 }
2001 } else {
9a2d6cb8 2002 if((node = resdcpath((argv[1][0] == '/')?(argv[1] + 1):(argv[1]), "UTF-8", '/')) == NULL)
d3372da9 2003 {
2004 qstr(sk, "$Error File not in cache|");
2005 goto out;
2006 }
2007 }
2008 if((fd = opensharecache(node)) < 0)
2009 {
2010 qstrf(sk, "$Error %s|", strerror(errno));
2011 goto out;
2012 }
2013 buf = getfspath(node);
2014 if((wbuf = icsmbstowcs(buf, NULL, NULL)) == NULL)
2015 flog(LOG_WARNING, "could not convert native path into a wcs (%s): %s", buf, strerror(errno));
2016 else
2017 transfersetpath(peer->transfer, wbuf);
2018 free(buf);
2019 }
2020 if(!strcmp(argv[0], "file"))
2021 {
2022 for(i = 4; argv[i] != NULL; i++)
2023 {
2024 if(!strcmp(argv[i], "ZL1"))
2025 initcompress(peer, CPRS_ZLIB);
2026 }
2027 if(fstat(fd, &sb) < 0)
2028 {
2029 flog(LOG_WARNING, "could not stat file %ls: %s", node->name, strerror(errno));
2030 qstr(sk, "$Error|");
2031 goto out;
2032 }
2033 if((start != 0) && ((start >= sb.st_size) || (lseek(fd, start, SEEK_SET) < 0)))
2034 {
2035 qstr(sk, "$Error Offset out of range|");
2036 goto out;
2037 }
2038 if((numbytes < 0) || (start + numbytes > sb.st_size))
2039 numbytes = sb.st_size - start;
2040 lesk = wrapsock(fd);
2041 transferprepul(peer->transfer, sb.st_size, start, start + numbytes, lesk);
2042 putsock(lesk);
2043 fd = -1;
2044 qstr(sk, "$ADCSND");
2045 sendadc(sk, "file");
2046 sendadc(sk, argv[1]);
2047 sendadcf(sk, "%i", start);
2048 sendadcf(sk, "%i", numbytes);
2049 if(peer->compress == CPRS_ZLIB)
2050 sendadc(sk, "ZL1");
2051 qstr(sk, "|");
9a2d6cb8 2052 startul(peer);
d3372da9 2053 } else if(!strcmp(argv[0], "tthl")) {
2054 /*
2055 * XXX: Implement full TTHL support.
2056 *
2057 * In the meantime, this is better than nothing, since it at
2058 * least allows fetching of the TTH root if it isn't already
2059 * known.
2060 */
2061 if(node == NULL)
2062 {
2063 qstr(sk, "$Error no TTHL data for virtual files|");
2064 goto out;
2065 }
2066 qstr(sk, "$ADCSND");
2067 sendadc(sk, "tthl");
2068 sendadc(sk, argv[1]);
2069 sendadc(sk, "0");
2070 sendadc(sk, "24");
2071 qstr(sk, "|");
2072 sockqueue(sk, node->hashtth, 24);
2073 } else {
2074 qstr(sk, "$Error Namespace not implemented|");
2075 goto out;
2076 }
d3372da9 2077
2078 out:
2079 if(fd >= 0)
2080 close(fd);
2081 freeparr(argv);
2082}
2083
9a2d6cb8 2084static void handletthl(struct dcpeer *peer)
2085{
2086 char buf[24];
2087
2088 while(peer->inbufdata >= 24)
2089 {
2090 pushtigertree(&peer->tth, peer->inbuf);
2091 memmove(peer->inbuf, peer->inbuf + 24, peer->inbufdata -= 24);
e52006fe 2092 peer->curread += 24;
9a2d6cb8 2093 }
e52006fe 2094 if(peer->curread >= peer->totalsize)
9a2d6cb8 2095 {
2096 peer->state = PEER_CMD;
2097 synctigertree(&peer->tth);
2098 restigertree(&peer->tth, buf);
2099 transfersethash(peer->transfer, newhash(L"TTH", 24, buf));
2100 requestfile(peer);
2101 }
2102}
2103
2104static void cmd_adcsnd(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
2105{
2106 char **argv;
2107 int start, numbytes;
2108
2109 if(peer->transfer == NULL)
2110 {
2111 freedcpeer(peer);
2112 return;
2113 }
2114 if((argv = parseadc(args)) == NULL)
2115 {
2116 freedcpeer(peer);
2117 return;
2118 }
2119 if(parrlen(argv) < 4)
2120 {
2121 freedcpeer(peer);
2122 goto out;
2123 }
2124 start = atoi(argv[2]);
2125 numbytes = atoi(argv[3]);
2126 if(!strcmp(argv[0], "tthl"))
2127 {
2128 if((start != 0) || (numbytes % 24 != 0))
2129 {
2130 /* Weird. Bail out. */
2131 freedcpeer(peer);
2132 goto out;
2133 }
2134 peer->state = PEER_TTHL;
2135 peer->totalsize = numbytes;
2136 peer->curread = 0;
2137 inittigertree(&peer->tth);
2138 handletthl(peer);
2139 } else if(!strcmp(argv[0], "file")) {
2140 if(start != peer->transfer->curpos)
2141 {
2142 freedcpeer(peer);
2143 goto out;
2144 }
2145 if(start + numbytes != peer->transfer->size)
2146 {
2147 transfersetsize(peer->transfer, start + numbytes);
2148 freedcpeer(peer);
2149 goto out;
2150 }
2151 startdl(peer);
e52006fe 2152 if(peer->inbufdata > 0)
2153 {
2154 sockpushdata(sk, peer->inbuf, peer->inbufdata);
2155 peer->inbufdata = 0;
2156 transread(sk, peer);
2157 }
9a2d6cb8 2158 } else {
2159 /* We certainly didn't request this...*/
2160 freedcpeer(peer);
2161 goto out;
2162 }
2163
2164 out:
2165 freeparr(argv);
2166}
2167
2168static void cmd_sending(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
2169{
2170 int numbytes;
2171
2172 if(peer->transfer == NULL)
2173 {
2174 freedcpeer(peer);
2175 return;
2176 }
2177 numbytes = atoi(args);
2178 if(peer->transfer->size - peer->transfer->curpos != numbytes)
2179 {
2180 transfersetsize(peer->transfer, peer->transfer->curpos + numbytes);
2181 freedcpeer(peer);
2182 return;
2183 }
2184 startdl(peer);
0d8c93cb 2185 if(peer->inbufdata > 0)
2186 {
2187 sockpushdata(sk, peer->inbuf, peer->inbufdata);
2188 peer->inbufdata = 0;
2189 transread(sk, peer);
2190 }
9a2d6cb8 2191}
2192
d3372da9 2193/*
2194Hub skeleton:
2195static void cmd_(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
2196{
2197 struct dchub *hub;
2198
2199 hub = fn->data;
2200 hubhandleaction(sk, fn, cmd, args);
2201}
2202
2203Peer skeleton:
2204static void cmd_(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
2205{
d3372da9 2206}
2207
2208*/
2209
2210static int hubreqconn(struct fnetpeer *peer)
2211{
2212 struct dchub *hub;
2213 char *mbsnick;
2214
2215 if((peer->fn->state != FNN_EST) || (peer->fn->fnet != &dcnet))
2216 {
2217 errno = EINVAL;
2218 return(1);
2219 }
2220 if((hub = peer->fn->data) == NULL)
2221 {
2222 errno = EFAULT;
2223 return(1);
2224 }
2225 if((mbsnick = icwcstombs(peer->id, DCCHARSET)) == NULL)
2226 return(1); /* Shouldn't happen, of course, but who knows... */
2227 if(tcpsock != NULL)
2228 {
2229 sendctm(peer->fn->sk, mbsnick);
2230 expectpeer(mbsnick, peer->fn);
2231 } else {
2232 qstrf(peer->fn->sk, "$RevConnectToMe %s %s|", hub->nativenick, mbsnick);
2233 }
2234 free(mbsnick);
2235 return(0);
2236}
2237
2238static int hubsendchat(struct fnetnode *fn, int public, wchar_t *to, wchar_t *string)
2239{
2240 struct dchub *hub;
2241 char *mbsstring, *mbsto;
2242
2243 hub = fn->data;
2244 if((mbsto = icwcstombs(to, DCCHARSET)) == NULL)
2245 {
2246 errno = EILSEQ;
2247 return(1);
2248 }
2249 if((mbsstring = icwcstombs(string, DCCHARSET)) == NULL)
2250 {
2251 errno = EILSEQ;
2252 return(1);
2253 }
2254 if((strchr(mbsto, '|') != NULL) || (strchr(mbsto, ' ') != NULL))
2255 {
2256 free(mbsto);
2257 free(mbsstring);
2258 errno = ESRCH;
2259 return(1);
2260 }
2261 if(strchr(mbsstring, '|') != NULL)
2262 {
2263 free(mbsto);
2264 free(mbsstring);
2265 errno = EILSEQ;
2266 return(1);
2267 }
2268 if(public)
2269 {
2270 if(*to == L'\0')
2271 {
2272 qstrf(fn->sk, "<%s> %s|", hub->nativenick, mbsstring);
2273 } else {
2274 qstrf(fn->sk, "$To: %s From: %s $<%s> %s|", mbsto, hub->nativenick, hub->nativenick, mbsstring);
2275 }
2276 } else {
2277 qstrf(fn->sk, "$To: %s From: %s $<%s> %s|", mbsto, hub->nativenick, hub->nativenick, mbsstring);
2278 }
2279 free(mbsto);
2280 free(mbsstring);
2281 return(0);
2282}
2283
2284static void findsizelimit(struct sexpr *sexpr, int *min, int *max)
2285{
2286 int minl, maxl, minr, maxr, retmin, retmax;
2287
2288 switch(sexpr->op)
2289 {
2290 case SOP_AND:
2291 findsizelimit(sexpr->l, &minl, &maxl);
2292 findsizelimit(sexpr->r, &minr, &maxr);
2293 retmin = (minl > minr)?minl:minr;
2294 if((maxl != -1) && (maxr != -1))
2295 retmax = (maxl < maxr)?maxl:maxr;
2296 else if(maxl != -1)
2297 retmax = maxl;
2298 else if(maxr != -1)
2299 retmax = maxr;
2300 else
2301 retmax = -1;
2302 break;
2303 case SOP_OR:
2304 findsizelimit(sexpr->l, &minl, &maxl);
2305 findsizelimit(sexpr->r, &minr, &maxr);
2306 retmin = (minl < minr)?minl:minr;
2307 if((maxl == -1) || (maxr == -1))
2308 retmax = -1;
2309 else
2310 retmax = (maxl > maxr)?maxl:maxr;
2311 break;
2312 case SOP_NOT:
2313 findsizelimit(sexpr->l, &minl, &maxl);
2314 if((minl == 0) && (maxl == -1)) /* Interval is unspecified */
2315 {
2316 retmin = 0;
2317 retmax = -1;
2318 } else if((minl == 0) && (maxl != -1)) {
2319 retmin = maxl + 1;
2320 retmax = -1;
2321 } else if((minl != 0) && (maxl == -1)) {
2322 retmin = 0;
2323 retmax = minl - 1;
2324 } else { /* This would yield two seperate intervals, which DC cannot handle */
2325 retmin = 0;
2326 retmax = -1;
2327 }
2328 case SOP_SIZELT:
2329 retmin = 0;
2330 retmax = sexpr->d.n - 1;
2331 break;
2332 case SOP_SIZEEQ:
2333 retmin = sexpr->d.n;
2334 retmax = sexpr->d.n;
2335 break;
2336 case SOP_SIZEGT:
2337 retmin = sexpr->d.n + 1;
2338 retmax = -1;
2339 break;
2340 default:
2341 retmin = 0;
2342 retmax = -1;
2343 break;
2344 }
2345 if(min != NULL)
2346 *min = retmin;
2347 if(max != NULL)
2348 *max = retmax;
2349}
2350
9d8cf743 2351static struct hash *findsehash(struct sexpr *sexpr)
2352{
2353 struct hash *h1, *h2;
2354
2355 switch(sexpr->op)
2356 {
2357 case SOP_AND:
2358 if((h1 = findsehash(sexpr->l)) != NULL)
2359 return(h1);
2360 if((h1 = findsehash(sexpr->r)) != NULL)
2361 return(h1);
2362 break;
2363 case SOP_OR:
2364 h1 = findsehash(sexpr->l);
2365 h2 = findsehash(sexpr->r);
2366 if(hashcmp(h1, h2))
2367 return(h1);
2368 break;
2369 case SOP_HASHIS:
2370 if(!wcscmp(sexpr->d.hash->algo, L"TTH"))
2371 return(sexpr->d.hash);
2372 default:
2373 break;
2374 }
2375 return(NULL);
2376}
2377
d3372da9 2378static int hubsearch(struct fnetnode *fn, struct search *srch, struct srchfnnlist *ln)
2379{
2380 struct dchub *hub;
2381 struct wcslist *list, *cur;
2382 char *sstr, *buf, *p;
2383 size_t sstrsize, sstrdata;
2384 struct sockaddr *name;
2385 socklen_t namelen;
2386 int minsize, maxsize;
9d8cf743 2387 struct hash *hash;
d3372da9 2388
2389 hub = fn->data;
2390 if((fn->state != FNN_EST) || (fn->sk == NULL) || (fn->sk->state != SOCK_EST))
2391 return(1);
2392 list = findsexprstrs(srch->sexpr);
2393 findsizelimit(srch->sexpr, &minsize, &maxsize);
9d8cf743 2394 hash = findsehash(srch->sexpr);
d3372da9 2395 if((minsize != 0) && (maxsize != -1))
2396 {
2397 /* Choose either minsize or maxsize by trying to determine
2398 * which choice will be most restrictive. The result can be
2399 * approximative at best anyway, so don't try too hard... */
2400 if((50000000 - maxsize) > (minsize - 50000000))
2401 minsize = 0;
2402 else
2403 maxsize = -1;
2404 }
d3372da9 2405 sstr = NULL;
2406 sstrsize = sstrdata = 0;
9d8cf743 2407 if((hash != NULL) && (hash->len == 24))
d3372da9 2408 {
9d8cf743 2409 /* Prioritize hash searches above all else */
2410 bufcat(sstr, "F?T?0?9?TTH:", 12);
2411 buf = base32encode(hash->buf, hash->len);
2412
2413 bufcat(sstr, buf, 39);
2414 free(buf);
2415 } else {
2416 if(minsize != 0)
d3372da9 2417 {
9d8cf743 2418 sizebuf2(sstr, sstrdata + 32, 1);
2419 snprintf(sstr + sstrdata, sstrsize - sstrdata, "T?F?%i?1?", minsize);
2420 } else if(maxsize != -1) {
2421 sizebuf2(sstr, sstrdata + 32, 1);
2422 snprintf(sstr + sstrdata, sstrsize - sstrdata, "T?T?%i?1?", maxsize);
2423 } else {
2424 bufcat(sstr, "F?F?0?1?", 8);
2425 }
2426 if(list != NULL)
2427 {
2428 for(cur = list; cur != NULL; cur = cur->next)
d3372da9 2429 {
9d8cf743 2430 if((buf = icwcstombs(cur->str, DCCHARSET)) == NULL)
2431 {
2432 /* Can't find anything anyway if the search expression
2433 * requires characters outside DC's charset. There's
2434 * nothing technically wrong with the search itself,
2435 * however, so return success. This should be
2436 * considered as an optimization. */
2437 freesl(&list);
2438 if(sstr != NULL)
2439 free(sstr);
2440 return(0);
2441 }
2442 if(cur != list)
2443 addtobuf(sstr, '$');
2444 /*
2445 * It probably doesn't hurt if buf contains any extra
2446 * dollar signs - it will just result in extra search
2447 * terms, and the extraneous results will be filtered by
2448 * the search layer anyway. It hurts if it contains any
2449 * pipes, though, so let's sell them for money.
2450 */
2451 for(p = buf; *p; p++)
2452 {
2453 if(*p == '|')
2454 *p = '$';
2455 }
2456 bufcat(sstr, buf, strlen(buf));
2457 free(buf);
d3372da9 2458 }
9d8cf743 2459 } else {
2460 /* Will match all files... :-/ */
2461 addtobuf(sstr, '.');
d3372da9 2462 }
d3372da9 2463 }
2464 addtobuf(sstr, 0);
2465 if(tcpsock != NULL)
2466 {
2467 if(sockgetremotename(udpsock, &name, &namelen) < 0)
2468 {
2469 flog(LOG_WARNING, "cannot get address of UDP socket");
2470 } else {
9d8cf743 2471 qstrf(fn->sk, "$Search %s %s|", formataddress(name, namelen), sstr);
d3372da9 2472 free(name);
2473 }
2474 } else {
9d8cf743 2475 qstrf(fn->sk, "$Search Hub:%s %s|", hub->nativenick, sstr);
d3372da9 2476 }
2477 free(sstr);
2478 freesl(&list);
2479 fn->lastsrch = time(NULL);
2480 return(0);
2481}
2482
2483#undef skipcmd
2484#undef qstr
2485#undef qstrf
2486
2487#define cc(c) ((void (*)(struct socket *, void *, char *, char *))(c))
2488struct command hubcmds[] =
2489{
2490 {"$Lock", cc(cmd_lock)},
2491 {"$HubName", cc(cmd_hubname)},
2492 {"$Hello", cc(cmd_hello)},
2493 {"$Quit", cc(cmd_quit)},
2494 {"$NickList", cc(cmd_nicklist)},
2495 {"$OpList", cc(cmd_oplist)},
2496 {"$MyINFO", cc(cmd_myinfo)},
2497 {"$ForceMove", cc(cmd_forcemove)},
2498 {"$Search", cc(cmd_search)},
2499 {"$MultiSearch", cc(cmd_search)},
2500 {"$ConnectToMe", cc(cmd_connecttome)},
2501 {"$RevConnectToMe", cc(cmd_revconnecttome)},
2502 {"$GetNetInfo", cc(cmd_getnetinfo)},
2503 {"$To:", cc(cmd_to)},
2504 {"$SR", cc(cmd_sr)},
2505 {"$UserCommand", cc(cmd_usercommand)},
48509089 2506 {"$GetPass", cc(cmd_getpass)},
c9b3ad74 2507 {"$LogedIn", cc(cmd_logedin)}, /* sic */
d3372da9 2508 {NULL, NULL}
2509};
2510
2511struct command peercmds[] =
2512{
2513 {"$MyNick", cc(cmd_mynick)},
2514 {"$Lock", cc(cmd_peerlock)},
2515 {"$Direction", cc(cmd_direction)},
2516 {"$Key", cc(cmd_key)},
2517 {"$FileLength", cc(cmd_filelength)},
2518 {"$Error", cc(cmd_error)},
2519 {"$MaxedOut", cc(cmd_maxedout)},
2520 {"$Get", cc(cmd_get)},
2521 {"$Send", cc(cmd_send)},
2522 {"$Supports", cc(cmd_supports)},
2523 {"$GetBlock", cc(cmd_getblock)},
2524 {"$UGetBlock", cc(cmd_getblock)},
2525 {"$GetZBlock", cc(cmd_getblock)},
2526 {"$UGetZBlock", cc(cmd_getblock)},
2527 {"$ADCGET", cc(cmd_adcget)},
9a2d6cb8 2528 {"$ADCSND", cc(cmd_adcsnd), 1},
2529 {"$Sending", cc(cmd_sending), 1},
d3372da9 2530 {NULL, NULL}
2531};
2532#undef cc
2533
2534static void dctransdetach(struct transfer *transfer, struct dcpeer *peer)
2535{
2536 CBUNREG(transfer, trans_filterout, peer);
2537 if(peer->freeing)
2538 return;
2539 peer->transfer = NULL;
2540 freedcpeer(peer);
2541}
2542
2543static void dctransgotdata(struct transfer *transfer, struct dcpeer *peer)
2544{
2545 int ret;
2546 void *buf;
2547 char outbuf[1024];
2548 z_stream *cstr;
2549 size_t bufsize;
2550
2551 if((peer->state == PEER_TRNS) || (peer->state == PEER_SYNC))
2552 {
2553 if(sockqueuesize(peer->sk) < 65536)
2554 {
2555 if((buf = transfergetdata(transfer, &bufsize)) != NULL)
2556 {
2557 if(peer->compress == CPRS_NONE)
2558 {
2559 sockqueue(peer->sk, buf, bufsize);
2560 } else if(peer->compress == CPRS_ZLIB) {
2561 cstr = peer->cprsdata;
2562 cstr->next_in = buf;
2563 cstr->avail_in = bufsize;
2564 while(cstr->avail_in > 0)
2565 {
2566 cstr->next_out = outbuf;
2567 cstr->avail_out = sizeof(outbuf);
2568 if((ret = deflate(cstr, 0)) != Z_OK)
2569 {
2570 flog(LOG_WARNING, "bug? deflate() did not return Z_OK (but rather %i)", ret);
2571 freedcpeer(peer);
2572 return;
2573 }
2574 sockqueue(peer->sk, outbuf, sizeof(outbuf) - cstr->avail_out);
2575 }
2576 }
2577 free(buf);
2578 }
2579 if(peer->state == PEER_SYNC)
2580 {
2581 if(peer->compress == CPRS_ZLIB)
2582 {
2583 cstr = peer->cprsdata;
2584 cstr->next_in = NULL;
2585 cstr->avail_in = 0;
2586 do
2587 {
2588 cstr->next_out = outbuf;
2589 cstr->avail_out = sizeof(outbuf);
2590 ret = deflate(cstr, Z_FINISH);
2591 if((ret != Z_OK) && (ret != Z_STREAM_END))
2592 {
2593 flog(LOG_WARNING, "bug? deflate(Z_FINISH) did not return Z_OK (but rather %i)", ret);
2594 freedcpeer(peer);
2595 return;
2596 }
2597 sockqueue(peer->sk, outbuf, sizeof(outbuf) - cstr->avail_out);
2598 } while(ret != Z_STREAM_END);
2599 }
2600 if(peer->ptclose)
2601 {
2602 freedcpeer(peer);
2603 } else {
2604 peer->state = PEER_CMD;
2605 endcompress(peer);
2606 transfersetstate(transfer, TRNS_HS);
2607 socksettos(peer->sk, confgetint("fnet", "fnptos"));
2608 peer->sk->writecb = NULL;
2609 }
2610 }
2611 }
2612 }
2613}
2614
2615static void dctransendofdata(struct transfer *transfer, struct dcpeer *peer)
2616{
2617 peer->state = PEER_SYNC;
2618 dctransgotdata(transfer, peer);
2619}
2620
2621static void dcwantdata(struct transfer *transfer, struct dcpeer *peer)
2622{
2623 if(transferdatasize(transfer) < 65536)
2624 peer->sk->ignread = 0;
2625}
2626
2627static void transread(struct socket *sk, struct dcpeer *peer)
2628{
2629 void *buf;
2630 size_t bufsize;
2631 struct transfer *transfer;
2632
2633 if((buf = sockgetinbuf(sk, &bufsize)) == NULL)
2634 return;
2635 if(peer->transfer == NULL)
2636 {
2637 free(buf);
2638 freedcpeer(peer);
2639 return;
2640 }
2641 transferputdata(peer->transfer, buf, bufsize);
2642 free(buf);
2643 if(peer->transfer->curpos >= peer->transfer->size)
2644 {
2645 transfer = peer->transfer;
2646 transferdetach(transfer);
2647 transferendofdata(transfer);
2648 return;
2649 }
2650 if(transferdatasize(peer->transfer) > 65535)
2651 sk->ignread = 1;
2652}
2653
2654static void transerr(struct socket *sk, int err, struct dcpeer *peer)
2655{
2656 struct transfer *transfer;
2657
2658 if((transfer = peer->transfer) == NULL)
2659 {
2660 freedcpeer(peer);
2661 return;
2662 }
2663 transferdetach(transfer);
2664 transferendofdata(transfer);
2665}
2666
2667static void transwrite(struct socket *sk, struct dcpeer *peer)
2668{
2669 if((peer->state != PEER_TRNS) && (peer->state != PEER_SYNC))
2670 return;
2671 if(peer->transfer == NULL)
2672 {
2673 freedcpeer(peer);
2674 return;
2675 }
2676 dctransgotdata(peer->transfer, peer);
2677}
2678
2679static void udpread(struct socket *sk, void *data)
2680{
d86b7a9f 2681 char *buf, *p, *p2, *hashbuf;
2682 size_t buflen, hashlen;
d3372da9 2683 char *nick, *filename, *hubname;
2684 int size, slots;
2685 struct fnetnode *fn, *myfn;
2686 struct dchub *hub;
2687 struct srchres *sr;
2688 wchar_t *wnick, *wfile;
d86b7a9f 2689 struct hash *hash;
d3372da9 2690
2691 if((buf = sockgetinbuf(sk, &buflen)) == NULL)
2692 return;
2693 buf = srealloc(buf, buflen + 1);
2694 buf[buflen] = 0;
2695 if(!strncmp(buf, "$SR ", 4))
2696 {
2697 p = buf + 4;
2698 nick = p;
2699 if((p2 = strchr(p, ' ')) == NULL)
2700 {
2701 free(buf);
2702 return;
2703 }
2704 *p2 = 0;
2705 p = p2 + 1;
2706 filename = p;
2707 if((p2 = strchr(p, 5)) == NULL)
2708 {
2709 free(buf);
2710 return;
2711 }
2712 *p2 = 0;
2713 p = p2 + 1;
2714 if((p2 = strchr(p, ' ')) == NULL)
2715 {
2716 free(buf);
2717 return;
2718 }
2719 *p2 = 0;
2720 size = atoi(p);
2721 p = p2 + 1;
2722 if((p2 = strchr(p, '/')) == NULL)
2723 {
2724 free(buf);
2725 return;
2726 }
2727 *p2 = 0;
2728 slots = atoi(p);
2729 p = p2 + 1;
2730 if((p2 = strchr(p, 5)) == NULL)
2731 {
2732 free(buf);
2733 return;
2734 }
2735 p = p2 + 1;
2736 hubname = p;
2737 if((p2 = strstr(p, " (")) == NULL)
2738 {
2739 free(buf);
2740 return;
2741 }
2742 *p2 = 0;
2743 if((wnick = icmbstowcs(nick, DCCHARSET)) == NULL)
2744 {
2745 free(buf);
2746 return;
2747 }
2748 if((wfile = icmbstowcs(filename, DCCHARSET)) == NULL)
2749 {
2750 free(wnick);
2751 free(buf);
2752 return;
2753 }
2754 myfn = NULL;
d86b7a9f 2755 hash = NULL;
2756 if(!strncmp(hubname, "TTH:", 4))
d3372da9 2757 {
d86b7a9f 2758 if((hashbuf = base32decode(hubname + 4, &hashlen)) != NULL)
2759 {
2760 if(hashlen == 24)
2761 hash = newhash(L"TTH", 24, hashbuf);
2762 free(hashbuf);
2763 }
2764 } else {
2765 for(fn = fnetnodes; fn != NULL; fn = fn->next)
d3372da9 2766 {
d86b7a9f 2767 if((fn->fnet == &dcnet) && ((hub = fn->data) != NULL))
d3372da9 2768 {
d86b7a9f 2769 if((hub->nativename != NULL) && !strcmp(hub->nativename, hubname))
d3372da9 2770 {
d86b7a9f 2771 if(myfn == NULL)
2772 {
2773 myfn = fn;
2774 } else {
2775 myfn = NULL;
2776 break;
2777 }
d3372da9 2778 }
2779 }
2780 }
2781 }
2782 sr = newsrchres(&dcnet, wfile, wnick);
2783 if(sr->peernick != NULL)
2784 free(sr->peernick);
2785 sr->peernick = swcsdup(wnick);
2786 sr->size = size;
2787 sr->slots = slots;
2788 free(wfile);
2789 free(wnick);
2790 if(myfn != NULL)
2791 getfnetnode(sr->fn = myfn);
d86b7a9f 2792 if(hash != NULL)
2793 sr->hash = hash;
d3372da9 2794 submitsrchres(sr);
2795 freesrchres(sr);
2796 }
2797 free(buf);
2798}
2799
2800static void hubread(struct socket *sk, struct fnetnode *fn)
2801{
2802 struct dchub *hub;
2803 char *newbuf;
2804 size_t datalen;
2805 char *p;
2806
2807 hub = (struct dchub *)fn->data;
2808 if((newbuf = sockgetinbuf(sk, &datalen)) == NULL)
2809 return;
2810 if(hub->inbufdata > 500000) /* Discard possible malicious data */
2811 hub->inbufdata = 0;
2812 sizebuf2(hub->inbuf, hub->inbufdata + datalen, 1);
2813 memcpy(hub->inbuf + hub->inbufdata, newbuf, datalen);
2814 free(newbuf);
2815 p = hub->inbuf + hub->inbufdata;
2816 hub->inbufdata += datalen;
2817 while((datalen > 0) && ((p = memchr(p, '|', datalen)) != NULL))
2818 {
2819 *(p++) = 0;
2820 newqcmd(&hub->queue, hub->inbuf);
2821 memmove(hub->inbuf, p, hub->inbufdata -= p - hub->inbuf);
2822 datalen = hub->inbufdata;
2823 p = hub->inbuf;
2824 }
2825}
2826
2827static void huberr(struct socket *sk, int err, struct fnetnode *fn)
2828{
2829 killfnetnode(fn);
2830}
2831
2832static int hubsetnick(struct fnetnode *fn, wchar_t *newnick)
2833{
2834 struct dchub *hub;
2835 char *buf;
2836
2837 hub = fn->data;
2838 if((buf = icwcstombs(newnick, DCCHARSET)) == NULL)
2839 return(1);
2840 if((strchr(buf, ' ') != NULL) || (strchr(buf, '|') != NULL) || (strchr(buf, '$') != NULL))
2841 {
2842 free(buf);
2843 return(1);
2844 }
2845 if(hub == NULL) /* Not yet connected */
2846 {
2847 free(buf);
2848 return(0);
2849 }
2850 if(hub->nativenick != NULL)
2851 free(hub->nativenick);
2852 hub->nativenick = buf;
2853 return(0);
2854}
2855
2856static struct dchub *newdchub(struct fnetnode *fn)
2857{
2858 struct dchub *new;
2859
2860 new = smalloc(sizeof(*new));
2861 memset(new, 0, sizeof(*new));
2862 fn->data = new;
2863 if(hubsetnick(fn, fn->mynick))
2864 fnetsetnick(fn, L"DoldaConnectUser-IN");
2865 /* IN as in Invalid Nick */
2866 return(new);
2867}
2868
2869static struct dcpeer *newdcpeer(struct socket *sk)
2870{
2871 struct dcpeer *new;
2872
2873 new = smalloc(sizeof(*new));
2874 memset(new, 0, sizeof(*new));
2875 new->transfer = NULL;
2876 getsock(sk);
2877 new->sk = sk;
2878 new->next = peers;
2879 new->prev = NULL;
2880 if(peers != NULL)
2881 peers->prev = new;
2882 peers = new;
2883 numdcpeers++;
2884 return(new);
2885}
2886
2887static void freedcpeer(struct dcpeer *peer)
2888{
2889 int i;
2890 struct qcommand *qcmd;
2891
2892 peer->freeing = 1;
2893 if(peers == peer)
2894 peers = peer->next;
2895 if(peer->next != NULL)
2896 peer->next->prev = peer->prev;
2897 if(peer->prev != NULL)
2898 peer->prev->next = peer->next;
2899 if(peer->transfer != NULL)
2900 {
2901 if(peer->transfer->dir == TRNSD_UP)
2902 peer->transfer->close = 1;
2903 if(peer->transfer->dir == TRNSD_DOWN)
2904 resettransfer(peer->transfer);
2905 transferdetach(peer->transfer);
2906 }
2907 if(peer->sk->data == peer)
2908 peer->sk->data = NULL;
2909 peer->sk->readcb = NULL;
2910 peer->sk->writecb = NULL;
2911 peer->sk->errcb = NULL;
2912 putsock(peer->sk);
2913 endcompress(peer);
2914 if(peer->supports != NULL)
2915 {
2916 for(i = 0; peer->supports[i] != NULL; i++)
2917 free(peer->supports[i]);
2918 free(peer->supports);
2919 }
d3372da9 2920 if(peer->inbuf != NULL)
2921 free(peer->inbuf);
2922 if(peer->key != NULL)
2923 free(peer->key);
2924 if(peer->wcsname != NULL)
2925 free(peer->wcsname);
2926 if(peer->nativename != NULL)
2927 free(peer->nativename);
2928 if(peer->fn != NULL)
2929 putfnetnode(peer->fn);
2930 while((qcmd = ulqcmd(&peer->queue)) != NULL)
2931 freeqcmd(qcmd);
2932 free(peer);
2933 numdcpeers--;
2934}
2935
2936static void hubconnect(struct fnetnode *fn)
2937{
2938 fn->sk->readcb = (void (*)(struct socket *, void *))hubread;
2939 fn->sk->errcb = (void (*)(struct socket *, int, void *))huberr;
2940 getfnetnode(fn);
2941 fn->data = newdchub(fn);
2942 fn->sk->data = fn;
2943 return;
2944}
2945
2946static void hubdestroy(struct fnetnode *fn)
2947{
2948 struct dchub *hub;
2949 struct qcommand *qcmd;
2950
2951 hub = (struct dchub *)fn->data;
2952 if(fn->sk != NULL)
2953 {
2954 if(fn->sk->data == fn)
2955 {
2956 fn->sk->data = NULL;
2957 putfnetnode(fn);
2958 }
2959 }
2960 if(hub == NULL)
2961 return;
2962 while((qcmd = ulqcmd(&hub->queue)) != NULL)
2963 freeqcmd(qcmd);
2964 if(hub->nativename != NULL)
2965 free(hub->nativename);
2966 if(hub->nativenick != NULL)
2967 free(hub->nativenick);
2968 if(hub->inbuf != NULL)
2969 free(hub->inbuf);
2970 free(hub);
2971}
2972
2973static wchar_t *dcbasename(wchar_t *filename)
2974{
2975 wchar_t *ret;
2976
2977 if((ret = wcsrchr(filename, L'\\')) != NULL)
2978 return(ret + 1);
2979 return(filename);
2980}
2981
2982static struct transferiface dctransfer =
2983{
2984 .detach = (void (*)(struct transfer *, void *))dctransdetach,
2985 .gotdata = (void (*)(struct transfer *, void *))dctransgotdata,
2986 .endofdata = (void (*)(struct transfer *, void *))dctransendofdata,
2987 .wantdata = (void (*)(struct transfer *, void *))dcwantdata
2988};
2989
2990static struct fnet dcnet =
2991{
2992 .name = L"dc",
2993 .connect = hubconnect,
2994 .destroy = hubdestroy,
2995 .setnick = hubsetnick,
2996 .reqconn = hubreqconn,
2997 .sendchat = hubsendchat,
2998 .search = hubsearch,
2999 .filebasename = dcbasename
3000};
3001
3002static void peerread(struct socket *sk, struct dcpeer *peer)
3003{
3004 char *newbuf, *p;
3005 size_t datalen;
9a2d6cb8 3006 struct command *cmd;
d3372da9 3007
3008 if((newbuf = sockgetinbuf(sk, &datalen)) == NULL)
3009 return;
3010 sizebuf2(peer->inbuf, peer->inbufdata + datalen, 1);
3011 memcpy(peer->inbuf + peer->inbufdata, newbuf, datalen);
3012 free(newbuf);
d3372da9 3013 peer->inbufdata += datalen;
9a2d6cb8 3014 if(peer->state == PEER_CMD)
d3372da9 3015 {
d3372da9 3016 p = peer->inbuf;
9a2d6cb8 3017 while((peer->inbufdata > 0) && (p = memchr(peer->inbuf, '|', peer->inbufdata)) != NULL)
3018 {
3019 *(p++) = 0;
3020 newqcmd(&peer->queue, peer->inbuf);
3021 for(cmd = peercmds; cmd->handler != NULL; cmd++)
3022 {
5eee9d66 3023 if(!memcmp(peer->inbuf, cmd->name, strlen(cmd->name)) && ((peer->inbuf[strlen(cmd->name)] == ' ') || (peer->inbuf[strlen(cmd->name)] == '|')))
9a2d6cb8 3024 break;
3025 }
5eee9d66 3026 memmove(peer->inbuf, p, peer->inbufdata -= p - peer->inbuf);
9a2d6cb8 3027 if(cmd->stop)
3028 {
3029 peer->state = PEER_STOP;
3030 break;
3031 }
9a2d6cb8 3032 }
3033 } else if(peer->state == PEER_TTHL) {
3034 handletthl(peer);
d3372da9 3035 }
3036}
3037
3038static void peererror(struct socket *sk, int err, struct dcpeer *peer)
3039{
3040 freedcpeer(peer);
3041}
3042
3043static void peerconnect(struct socket *sk, int err, struct fnetnode *fn)
3044{
3045 struct dcpeer *peer;
3046
3047 if(err != 0)
3048 {
3049 putfnetnode(fn);
3050 return;
3051 }
3052 peer = newdcpeer(sk);
3053 peer->fn = fn;
3054 peer->accepted = 0;
3055 sk->readcb = (void (*)(struct socket *, void *))peerread;
3056 sk->errcb = (void (*)(struct socket *, int, void *))peererror;
3057 sk->data = peer;
3058 socksettos(sk, confgetint("fnet", "fnptos"));
d3372da9 3059 putsock(sk);
9a2d6cb8 3060 sendmynick(peer);
3061 sendpeerlock(peer);
d3372da9 3062}
3063
3064static void peeraccept(struct socket *sk, struct socket *newsk, void *data)
3065{
3066 struct dcpeer *peer;
3067
3068 peer = newdcpeer(newsk);
3069 peer->accepted = 1;
3070 newsk->readcb = (void (*)(struct socket *, void *))peerread;
3071 newsk->errcb = (void (*)(struct socket *, int, void *))peererror;
3072 newsk->data = peer;
3073 socksettos(newsk, confgetint("fnet", "fnptos"));
d3372da9 3074}
3075
3076static void updatehmlist(void)
3077{
3078 int i, lev, ic, ret;
3079 struct sharecache *node;
3080 char *buf, *buf2, numbuf[32];
3081 size_t bufsize, bufdata;
3082 int fd, ibuf;
3083
3084 bufdata = 0;
3085 buf = smalloc(bufsize = 65536);
3086 node = shareroot->child;
3087 lev = 0;
3088 while(1)
3089 {
3090 ic = 0;
3091 if((buf2 = icwcstombs(node->name, DCCHARSET)) != NULL)
3092 {
3093 for(i = 0; i < lev; i++)
3094 addtobuf(buf, 9);
3095 bufcat(buf, buf2, strlen(buf2));
3096 free(buf2);
3097 if(node->f.b.type == FILE_REG)
3098 {
3099 addtobuf(buf, '|');
3100 sprintf(numbuf, "%i", node->size);
3101 bufcat(buf, numbuf, strlen(numbuf));
3102 }
3103 addtobuf(buf, 13);
3104 addtobuf(buf, 10);
3105 } else {
3106 ic = 1;
3107 }
3108 if((node->child != NULL) && !ic)
3109 {
3110 lev++;
3111 node = node->child;
3112 } else if(node->next != NULL) {
3113 node = node->next;
3114 } else {
3115 while(node->next == NULL)
3116 {
3117 lev--;
3118 node = node->parent;
3119 if(node == shareroot)
3120 break;
3121 }
3122 if(node == shareroot)
3123 break;
3124 node = node->next;
3125 }
3126 }
3127 if(hmlistname != NULL)
3128 {
3129 unlink(hmlistname);
3130 free(hmlistname);
3131 }
3132 hmlistname = sstrdup("/tmp/dc-filelist-hm-XXXXXX");
3133 if((fd = mkstemp(hmlistname)) < 0)
3134 {
3135 flog(LOG_WARNING, "could not create HM file list tempfile: %s", strerror(errno));
3136 free(hmlistname);
3137 hmlistname = NULL;
3138 } else {
3139 /*
3140 * I do not want to implement a good Huffman encoder, and it's not
3141 * like Huffman encoding actually yields any impressive results
3142 * for DC file lists anyway, so I'll just output a bogus
3143 * tree. Implement a good encoder if you want to.
3144 */
3145 write(fd, "HE3\r\0", 5);
3146 write(fd, &bufdata, 4);
3147 ibuf = 256;
3148 write(fd, &ibuf, 2);
3149 ibuf = 8;
3150 for(i = 0; i < 256; i++)
3151 {
3152 write(fd, &i, 1);
3153 write(fd, &ibuf, 1);
3154 }
3155 for(i = 0; i < 256; i++)
3156 write(fd, &i, 1);
3157 for(buf2 = buf; bufdata > 0;)
3158 {
3159 if((ret = write(fd, buf2, bufdata)) < 0)
3160 {
3161 flog(LOG_WARNING, "could not write file list: %s", strerror(errno));
3162 break;
3163 }
3164 bufdata -= ret;
3165 buf2 += ret;
3166 }
3167 close(fd);
3168 }
3169 free(buf);
3170}
3171
3172static struct xmlent
3173{
3174 wchar_t c;
3175 wchar_t *ent;
3176} entities[] = {
3177 {L'&', L"&amp;"},
3178 {L'\"', L"&#34;"},
3179/* {L'\'', L"&quot;"}, Emulate DC++ escaping by omitting this. */
3180 {L'\0', NULL}
3181};
3182
3183static wchar_t *escapexml(wchar_t *src)
3184{
3185 static wchar_t *buf = NULL;;
3186 int ret, c;
3187 wchar_t nbuf[32];
3188 size_t bufsize, bufdata;
3189 struct xmlent *ent;
3190
3191 if(buf != NULL)
3192 free(buf);
3193 buf = NULL;
3194 bufsize = bufdata = 0;
3195 for(; *src != L'\0'; src++)
3196 {
3197 c = wctob(*src);
3198 if((c > 0) && (c < 32))
3199 {
3200 bufcat(buf, L"&#", 2);
3201 ret = swprintf(nbuf, (sizeof(nbuf) / sizeof(*nbuf)), L"%i", c);
3202 bufcat(buf, nbuf, ret);
3203 addtobuf(buf, L';');
3204 } else {
3205 for(ent = entities; ent->ent != NULL; ent++)
3206 {
3207 if(ent->c == *src)
3208 {
3209 bufcat(buf, ent->ent, wcslen(ent->ent));
3210 break;
3211 }
3212 }
3213 if(ent->ent == NULL)
3214 addtobuf(buf, *src);
3215 }
3216 }
3217 addtobuf(buf, L'\0');
3218 return(buf);
3219}
3220
3221static void updatexmllist(void)
3222{
3223 int i, fd, lev;
3224 FILE *fs;
3225 char cidbuf[14], *namebuf;
3226 char *hashbuf;
3227 struct sharecache *node;
3228
3229 if(xmllistname != NULL)
3230 {
3231 unlink(xmllistname);
3232 free(xmllistname);
3233 }
3234 xmllistname = sstrdup("/tmp/dc-filelist-dcxml-XXXXXX");
3235 if((fd = mkstemp(xmllistname)) < 0)
3236 {
3237 flog(LOG_WARNING, "could not create XML file list tempfile: %s", strerror(errno));
3238 free(xmllistname);
3239 xmllistname = NULL;
3240 return;
3241 }
3242 if((fs = fdopen(fd, "w")) == NULL)
3243 {
3244 flog(LOG_WARNING, "could not fdopen XML list fd %i: %s", fd, strerror(errno));
3245 unlink(xmllistname);
3246 free(xmllistname);
3247 xmllistname = NULL;
3248 close(fd);
3249 return;
3250 }
3251 fprintf(fs, "<?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"yes\"?>\r\n");
3252 for(i = 0; i < sizeof(cidbuf) - 1; i++)
3253 cidbuf[i] = (rand() % ('Z' - 'A' + 1)) + 'A';
3254 cidbuf[i] = 0;
3255 fprintf(fs, "<FileListing Version=\"1\" CID=\"%s\" Base=\"/\" Generator=\"%s\">\r\n", cidbuf, DCIDFULL);
3256
3257 node = shareroot->child;
3258 lev = 0;
3259 while(1)
3260 {
3261 if((namebuf = icswcstombs(escapexml(node->name), "UTF-8", NULL)) != NULL)
3262 {
3263 for(i = 0; i < lev; i++)
3264 fputc('\t', fs);
3265 if(node->child != NULL)
3266 {
3267 fprintf(fs, "<Directory Name=\"%s\">\r\n", namebuf);
3268 node = node->child;
3269 lev++;
3270 continue;
3271 } else {
3272 fprintf(fs, "<File Name=\"%s\" Size=\"%i\"", namebuf, node->size);
3273 if(node->f.b.hastth)
3274 {
3275 hashbuf = base32encode(node->hashtth, 24);
3276 fprintf(fs, " TTH=\"%.39s\"", hashbuf);
3277 free(hashbuf);
3278 }
3279 fprintf(fs, "/>\r\n");
3280 }
3281 while(node->next == NULL)
3282 {
3283 node = node->parent;
3284 if(node == shareroot)
3285 {
3286 break;
3287 } else {
3288 lev--;
3289 for(i = 0; i < lev; i++)
3290 fputc('\t', fs);
3291 fprintf(fs, "</Directory>\r\n");
3292 }
3293 }
3294 if(node == shareroot)
3295 break;
3296 node = node->next;
3297 }
3298 }
3299
3300#ifdef DCPP_MASQUERADE
3301 fprintf(fs, "</FileListing>");
3302#else
3303 fprintf(fs, "</FileListing>\r\n");
3304#endif
3305 fclose(fs);
3306}
3307
3308static void updatexmlbz2list(void)
3309{
3310 int err, fd;
3311 FILE *in;
3312 FILE *real;
3313 BZFILE *out;
3314 char buf[1024];
3315 size_t bufdata;
3316
3317 if(xmllistname == NULL)
3318 return;
3319 if((in = fopen(xmllistname, "r")) == NULL)
3320 {
3321 flog(LOG_WARNING, "could not open XML file list for bzipping: %s", strerror(errno));
3322 return;
3323 }
3324 if(xmlbz2listname != NULL)
3325 {
3326 unlink(xmlbz2listname);
3327 free(xmlbz2listname);
3328 }
3329 xmlbz2listname = sstrdup("/tmp/dc-filelist-dcxmlbz2-XXXXXX");
3330 if((fd = mkstemp(xmlbz2listname)) < 0)
3331 {
3332 flog(LOG_WARNING, "could not create bzipped XML file list tempfile: %s", strerror(errno));
3333 free(xmlbz2listname);
3334 xmlbz2listname = NULL;
3335 fclose(in);
3336 return;
3337 }
3338 if((real = fdopen(fd, "w")) == NULL)
3339 {
3340 flog(LOG_WARNING, "could not fdopen bzipped XML list fd %i: %s", fd, strerror(errno));
3341 close(fd);
3342 unlink(xmlbz2listname);
3343 free(xmlbz2listname);
3344 xmlbz2listname = NULL;
3345 fclose(in);
3346 return;
3347 }
3348 out = BZ2_bzWriteOpen(&err, real, 9, 0, 0);
3349 if(err != BZ_OK)
3350 {
3351 flog(LOG_WARNING, "could not open bzip2 stream from XML list");
3352 fclose(real);
3353 unlink(xmlbz2listname);
3354 free(xmlbz2listname);
3355 xmlbz2listname = NULL;
3356 fclose(in);
3357 return;
3358 }
3359 while(!feof(in))
3360 {
3361 bufdata = fread(buf, 1, sizeof(buf), in);
3362 BZ2_bzWrite(&err, out, buf, bufdata);
3363 }
3364 fclose(in);
3365 BZ2_bzWriteClose(&err, out, 0, NULL, NULL);
3366 fclose(real);
3367}
3368
3369static int shareupdate(unsigned long long uusharesize, void *data)
3370{
3371 updatehmlist();
3372 updatexmllist();
3373 updatexmlbz2list();
3374 return(0);
3375}
3376
3377static void dispatchcommand(struct qcommand *qcmd, struct command *cmdlist, struct socket *sk, void *data)
3378{
3379 char *p;
3380 struct command *cmd;
3381
3382 if((p = strchr(qcmd->string, ' ')) != NULL)
3383 *(p++) = 0;
3384 for(cmd = cmdlist; cmd->handler != NULL; cmd++)
3385 {
3386 if(!strcmp(cmd->name, qcmd->string))
3387 break;
3388 }
3389 if(cmd->handler != NULL)
3390 cmd->handler(sk, data, qcmd->string, p);
3391/*
3392 else
3393 flog(LOG_DEBUG, "Unimplemented DC command: %s \"%s\"", qcmd->string, p?p:"noargs");
3394*/
3395}
3396
3397static int run(void)
3398{
3399 struct fnetnode *fn, *nextfn;
3400 struct dchub *hub;
3401 struct dcpeer *peer, *nextpeer;
3402 struct qcommand *qcmd;
3403 int ret;
3404
3405 ret = 0;
3406 for(fn = fnetnodes; fn != NULL; fn = nextfn)
3407 {
3408 nextfn = fn->next;
3409 if(fn->fnet != &dcnet)
3410 continue;
3411 if(fn->data == NULL)
3412 continue;
3413 hub = (struct dchub *)fn->data;
3414 if((qcmd = ulqcmd(&hub->queue)) != NULL)
3415 {
3416 if(*qcmd->string == '$')
3417 {
3418 if((fn->sk != NULL) && (fn->sk->state == SOCK_EST))
3419 dispatchcommand(qcmd, hubcmds, fn->sk, fn);
3420 } else if(*qcmd->string != 0) {
3421 hubrecvchat(fn->sk, fn, NULL, qcmd->string);
3422 }
3423 freeqcmd(qcmd);
3424 ret = 1;
3425 break;
3426 }
3427 }
3428 for(peer = peers; peer != NULL; peer = nextpeer)
3429 {
3430 nextpeer = peer->next;
3431 if((qcmd = ulqcmd(&peer->queue)) != NULL)
3432 {
3433 if(*qcmd->string == '$')
3434 dispatchcommand(qcmd, peercmds, peer->sk, peer);
3435 freeqcmd(qcmd);
3436 ret = 1;
3437 break;
3438 }
3439 }
3440 return(ret);
3441}
3442
3443static void preinit(int hup)
3444{
3445 if(hup)
3446 return;
3447 regfnet(&dcnet);
3448}
3449
3450static int updateudpport(struct configvar *var, void *uudata)
3451{
3452 struct sockaddr_in addr;
3453 struct socket *newsock;
3454
3455 memset(&addr, 0, sizeof(addr));
3456 addr.sin_family = AF_INET;
3457 addr.sin_port = htons(var->val.num);
3458 if((newsock = netcsdgram((struct sockaddr *)&addr, sizeof(addr))) == NULL)
3459 {
3460 flog(LOG_WARNING, "could not create new DC UDP socket, reverting to old: %s", strerror(errno));
3461 return(0);
3462 }
3463 newsock->readcb = udpread;
3464 if(udpsock != NULL)
3465 putsock(udpsock);
3466 udpsock = newsock;
3467 return(0);
3468}
3469
3470static int updatetcpport(struct configvar *var, void *uudata)
3471{
3472 struct sockaddr_in addr;
3473 struct socket *newsock;
3474
3475 memset(&addr, 0, sizeof(addr));
3476 addr.sin_family = AF_INET;
3477 addr.sin_port = htons(var->val.num);
3478 if((newsock = netcslisten(SOCK_STREAM, (struct sockaddr *)&addr, sizeof(addr), peeraccept, NULL)) == NULL)
3479 flog(LOG_INFO, "could not listen to a remote address, going into passive mode");
3480 if(tcpsock != NULL)
3481 putsock(tcpsock);
3482 tcpsock = newsock;
3483 return(0);
3484}
3485
3486static int init(int hup)
3487{
3488 struct sockaddr_in addr;
3489
3490 if(!hup)
3491 {
3492 GCBREG(sharechangecb, shareupdate, NULL);
3493 if(udpsock != NULL)
3494 putsock(udpsock);
3495 if(tcpsock != NULL)
3496 putsock(tcpsock);
3497 addr.sin_family = AF_INET;
3498 memset(&addr.sin_addr, 0, sizeof(addr.sin_addr));
3499 addr.sin_port = htons(confgetint("dc", "udpport"));
3500 if((udpsock = netcsdgram((struct sockaddr *)&addr, sizeof(addr))) == NULL)
3501 {
3502 flog(LOG_CRIT, "could not create DC UDP socket: %s", strerror(errno));
3503 return(1);
3504 }
3505 udpsock->readcb = udpread;
3506 addr.sin_port = htons(confgetint("dc", "tcpport"));
3507 if((tcpsock = netcslisten(SOCK_STREAM, (struct sockaddr *)&addr, sizeof(addr), peeraccept, NULL)) == NULL)
3508 flog(LOG_INFO, "could not listen to a remote address, going into passive mode");
3509 CBREG(confgetvar("dc", "udpport"), conf_update, updateudpport, NULL, NULL);
3510 CBREG(confgetvar("dc", "tcpport"), conf_update, updatetcpport, NULL, NULL);
3511 CBREG(confgetvar("net", "mode"), conf_update, updatetcpport, NULL, NULL);
3512 }
3513 return(0);
3514}
3515
3516static void terminate(void)
3517{
3518 if(hmlistname != NULL)
3519 {
3520 unlink(hmlistname);
3521 free(hmlistname);
3522 }
3523 if(xmllistname != NULL)
3524 {
3525 unlink(xmllistname);
3526 free(xmllistname);
3527 }
3528 if(xmlbz2listname != NULL)
3529 {
3530 unlink(xmlbz2listname);
3531 free(xmlbz2listname);
3532 }
3533}
3534
3535static struct configvar myvars[] =
3536{
3537 {CONF_VAR_STRING, "desc", {.str = L""}},
3538 {CONF_VAR_STRING, "speedstring", {.str = L"LAN(T1)"}},
3539 {CONF_VAR_STRING, "email", {.str = L"spam@spam.org"}},
3540 {CONF_VAR_INT, "udpport", {.num = 0}},
3541 {CONF_VAR_INT, "tcpport", {.num = 0}},
3542 {CONF_VAR_END}
3543};
3544
3545static struct module me =
3546{
3547 .conf =
3548 {
3549 .vars = myvars
3550 },
3551 .preinit = preinit,
3552 .init = init,
3553 .run = run,
3554 .terminate = terminate,
3555 .name = "dc"
3556};
3557
3558MODULE(me)
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