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Fixed ADC parsing bug.
[doldaconnect.git] / daemon / fnet-dc.c
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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 <unistd.h>
23#include <fcntl.h>
24#include <string.h>
25#include <netinet/in.h>
26#include <arpa/inet.h>
27#include <wctype.h>
28#include <time.h>
29#include <errno.h>
30#include <bzlib.h>
31#include <zlib.h>
32#include <sys/stat.h>
33#include <stdint.h>
34
35#ifdef HAVE_CONFIG_H
36#include <config.h>
37#endif
38#include "filenet.h"
39#include "log.h"
40#include "module.h"
41#include "utils.h"
42#include "client.h"
43#include "transfer.h"
44#include "sysevents.h"
45#include "net.h"
46#include <tiger.h>
47
48/*
49 * The Direct Connect protocol is extremely ugly. Thus, this code must
50 * also be a bit ugly in certain places. Please forgive me. =/
51 *
52 * This also means that there might be some pieces of the code that
53 * look completely illogical to you, and you think that you may make
54 * them much neater/better. However, in many cases it might just be
55 * that it's required to cope with some oddity of the protocol, such
56 * as the amazingly ugly delayed key response in the peer protocol.
57 */
58
59/* I assume this is the correct character set to use for DC,
60 * considering it was developed without i18n support under Windows */
61#define DCCHARSET "windows-1252"
62
63#define PEER_CMD 0
64#define PEER_STOP 1
65#define PEER_TRNS 2
66#define PEER_SYNC 3
67#define PEER_TTHL 4
68
69#define CPRS_NONE 0
70#define CPRS_ZLIB 1
71
72struct command
73{
74 char *name;
75 void (*handler)(struct socket *sk, void *data, char *cmd, char *args);
76 int stop;
77 int limit;
78};
79
80struct qcommand
81{
82 struct qcommand *next;
83 char *string;
84};
85
86struct qcmdqueue
87{
88 struct qcommand *f, *l;
89 int size;
90};
91
92struct dchub
93{
94 struct socket *sk;
95 char *inbuf;
96 size_t inbufdata, inbufsize;
97 struct qcmdqueue queue;
98 int extended, dcppemu;
99 char *charset;
100 char *nativename;
101 char *nativenick;
102 char **supports;
103};
104
105struct dcexppeer
106{
107 struct dcexppeer *next, *prev;
108 char *nick;
109 struct fnetnode *fn;
110 struct timer *expire;
111};
112
113struct dcpeer
114{
115 struct dcpeer *next, *prev;
116 struct socket *sk;
117 struct fnetnode *fn;
118 char *inbuf;
119 size_t inbufdata, inbufsize;
120 off_t curread, totalsize;
121 int close;
122 struct timer *timeout;
123 struct qcmdqueue queue;
124 struct transfer *transfer;
125 struct socket *trpipe;
126 int state;
127 int ptclose; /* Close after transfer is complete */
128 int accepted; /* If false, we connected, otherwise, we accepted */
129 int extended, dcppemu;
130 int direction; /* Using the constants from transfer.h */
131 int compress;
132 int hascurpos, fetchingtthl, notthl;
133 struct tigertreehash tth;
134 char *charset;
135 void *cprsdata;
136 char *key;
137 char *nativename;
138 char **supports;
139 wchar_t *wcsname;
140};
141
142static struct fnet dcnet;
143static struct socket *udpsock = NULL;
144static struct lport *tcpsock = NULL;
145static struct dcpeer *peers = NULL;
146int numdcpeers = 0;
147static struct dcexppeer *expected = NULL;
148static char *hmlistname = NULL;
149static char *xmllistname = NULL;
150static char *xmlbz2listname = NULL;
151static struct timer *listwritetimer = NULL;
152
153static struct socket *mktrpipe(struct dcpeer *peer);
154static void peerconnect(struct socket *sk, int err, struct fnetnode *fn);
155static void freedcpeer(struct dcpeer *peer);
156static void transread(struct socket *sk, struct dcpeer *peer);
157static void transerr(struct socket *sk, int err, struct dcpeer *peer);
158static void transwrite(struct socket *sk, struct dcpeer *peer);
159static void updatehmlist(void);
160static void updatexmllist(void);
161static void updatexmlbz2list(void);
162static void requestfile(struct dcpeer *peer);
163static void updatelists(int now);
164static int trdestroycb(struct transfer *transfer, struct dcpeer *peer);
165
166static int reservedchar(unsigned char c)
167{
168 return((c == 0) || (c == 5) || (c == 124) || (c == 96) || (c == 126) || (c == 36));
169}
170
171/* Oh, how I despise having to do this... */
172static char *dcmakekey(char *lock)
173{
174 int i, len, offset;
175 char *buf, *key;
176 char save;
177
178 buf = smalloc(strlen(lock));
179 save = 5;
180 len = 0;
181 for(i = 0; lock[i]; i++)
182 {
183 buf[i] = lock[i] ^ save;
184 buf[i] = ((buf[i] & 0x0F) << 4) | ((buf[i] & 0xF0) >> 4);
185 save = lock[i];
186 if((i != 0) && reservedchar(buf[i]))
187 len += 10;
188 else
189 len++;
190 }
191 buf[0] ^= buf[i - 1];
192 if(reservedchar(buf[0]))
193 len += 10;
194 else
195 len++;
196 key = smalloc(len + 1);
197 offset = 0;
198 for(i = 0; lock[i] != 0; i++)
199 {
200 if(reservedchar(buf[i]))
201 offset += sprintf(key + offset, "/%%DCN%03i%%/", buf[i]);
202 else
203 key[offset++] = buf[i];
204 }
205 key[offset] = 0;
206 free(buf);
207 return(key);
208}
209
210static wchar_t *nmdc2path(char *nmdc, char *charset)
211{
212 wchar_t *ret, *p;
213
214 if((ret = icmbstowcs(nmdc, charset)) == NULL)
215 return(NULL);
216 for(p = ret; *p != L'\0'; p++) {
217 if(*p == L'\\')
218 *p = L'/';
219 }
220 return(ret);
221}
222
223static char *path2nmdc(wchar_t *path, char *charset)
224{
225 char *ret, *p;
226
227 if((ret = icwcstombs(path, charset)) == NULL)
228 return(NULL);
229 for(p = ret; *p; p++) {
230 if(*p == '/')
231 *p = '\\';
232 }
233 return(ret);
234}
235
236static wchar_t *adc2path(char *adc)
237{
238 return(icmbstowcs(adc, "UTF-8"));
239}
240
241static char *path2adc(wchar_t *path)
242{
243 return(icwcstombs(path, "UTF-8"));
244}
245
246static int isdchash(struct hash *hash)
247{
248 if(wcscmp(hash->algo, L"TTH"))
249 return(0);
250 if(hash->len != 24)
251 return(0);
252 return(1);
253}
254
255/*
256 * Uncomment when used!
257
258static int hubsupports(struct dchub *hub, char *cap)
259{
260 char **p;
261
262 if(hub->supports == NULL)
263 return(0);
264 for(p = hub->supports; *p != NULL; p++)
265 {
266 if(!strcasecmp(*p, cap))
267 return(1);
268 }
269 return(0);
270}
271*/
272
273static int supports(struct dcpeer *peer, char *cap)
274{
275 char **p;
276
277 if(peer->supports == NULL)
278 return(0);
279 for(p = peer->supports; *p != NULL; p++)
280 {
281 if(!strcasecmp(*p, cap))
282 return(1);
283 }
284 return(0);
285}
286
287static void endcompress(struct dcpeer *peer)
288{
289 if(peer->compress == CPRS_ZLIB)
290 {
291 deflateEnd(peer->cprsdata);
292 free(peer->cprsdata);
293 }
294 peer->compress = CPRS_NONE;
295}
296
297static void initcompress(struct dcpeer *peer, int algo)
298{
299 int ret;
300
301 endcompress(peer);
302 peer->compress = algo;
303 if(algo == CPRS_ZLIB)
304 {
305 peer->cprsdata = smalloc(sizeof(z_stream));
306 memset(peer->cprsdata, 0, sizeof(z_stream));
307 if((ret = deflateInit(peer->cprsdata, 3)) != Z_OK)
308 {
309 flog(LOG_CRIT, "Aiya! zlib refuses to init (%i)!", ret);
310 abort();
311 }
312 }
313}
314
315static void unquote(wchar_t *in)
316{
317 wchar_t *p, *p2, nc;
318
319 for(p = in; *p != L'\0'; p++)
320 {
321 if(*p == L'&')
322 {
323 for(p2 = p + 1; (*p2 != L'\0') && (*p2 != L';') && (*p2 != L'&'); p2++);
324 if(*p2 == L'&')
325 continue;
326 if(*p2 == L'\0')
327 return;
328 *p2 = L'\0';
329 nc = L'\0';
330 if(!wcscmp(p + 1, L"amp"))
331 {
332 nc = L'&';
333 } else if(p[1] == L'#') {
334 nc = ucptowc(wcstol(p + 2, NULL, 10));
335 }
336 if(nc == L'\0')
337 {
338 *p2 = L';';
339 p = p2;
340 continue;
341 }
342 *p = nc;
343 memmove(p + 1, p2 + 1, (wcslen(p2 + 1) + 1) * sizeof(wchar_t));
344 }
345 }
346}
347
348static void freeexppeer(struct dcexppeer *ep)
349{
350 if(ep->next != NULL)
351 ep->next->prev = ep->prev;
352 if(ep->prev != NULL)
353 ep->prev->next = ep->next;
354 if(ep == expected)
355 expected = ep->next;
356 free(ep->nick);
357 putfnetnode(ep->fn);
358 if(ep->expire != NULL)
359 canceltimer(ep->expire);
360 free(ep);
361}
362
363static void exppeerexpire(int cancelled, struct dcexppeer *ep)
364{
365 ep->expire = NULL;
366 if(!cancelled)
367 freeexppeer(ep);
368}
369
370static struct dcexppeer *expectpeer(char *nick, struct fnetnode *fn)
371{
372 struct dcexppeer *ep;
373
374 ep = smalloc(sizeof(*ep));
375 ep->nick = sstrdup(nick);
376 getfnetnode(ep->fn = fn);
377 ep->expire = timercallback(ntime() + 300, (void (*)(int, void *))exppeerexpire, ep);
378 ep->next = expected;
379 ep->prev = NULL;
380 if(expected != NULL)
381 expected->prev = ep;
382 expected = ep;
383 return(ep);
384}
385
386static struct qcommand *newqcmd(struct qcmdqueue *queue, char *string)
387{
388 struct qcommand *new;
389
390 new = smalloc(sizeof(*new));
391 new->string = sstrdup(string);
392 new->next = NULL;
393 if(queue->l == NULL)
394 queue->f = new;
395 else
396 queue->l->next = new;
397 queue->l = new;
398 queue->size++;
399 return(new);
400}
401
402static struct qcommand *ulqcmd(struct qcmdqueue *queue)
403{
404 struct qcommand *qcmd;
405
406 if((qcmd = queue->f) == NULL)
407 return(NULL);
408 if((queue->f = qcmd->next) == NULL)
409 queue->l = NULL;
410 queue->size--;
411 return(qcmd);
412}
413
414static void freeqcmd(struct qcommand *qcmd)
415{
416 free(qcmd->string);
417 free(qcmd);
418}
419
420static void hubrecvchat(struct socket *sk, struct fnetnode *fn, char *from, char *string)
421{
422 wchar_t *chat, *wfrom, *wpeer;
423 char *p, *end;
424 struct fnetpeer *peer;
425 struct dchub *hub;
426
427 hub = fn->data;
428 end = string + strlen(string);
429 while((p = strchr(string, 13)) != NULL)
430 memmove(p, p + 1, (end-- - p));
431 if(from != NULL)
432 {
433 if((strlen(string) > strlen(from) + 2) && (*string == '<') && !memcmp(string + 1, from, strlen(from)) && (*(string + strlen(from) + 1) == '>'))
434 string += strlen(from) + 2;
435 if((wfrom = icmbstowcs(from, hub->charset)) == NULL)
436 return;
437 wpeer = swcsdup(wfrom);
438 } else {
439 wfrom = NULL;
440 wpeer = NULL;
441 if(*string == '<')
442 {
443 for(p = string + 1; *p; p++)
444 {
445 if((*p == ' ') || (*p == '>'))
446 break;
447 }
448 if(*p == '>')
449 {
450 *(p++) = 0;
451 if(*p == ' ')
452 p++;
453 if((wpeer = icmbstowcs(string + 1, hub->charset)) == NULL)
454 return;
455 string = p;
456 }
457 }
458 if(wpeer == NULL)
459 wpeer = swcsdup(L"");
460 }
461 if((chat = icmbstowcs(string, hub->charset)) == NULL)
462 {
463 if(wfrom != NULL)
464 free(wfrom);
465 free(wpeer);
466 return;
467 }
468 unquote(chat);
469 if(wfrom != NULL)
470 {
471 if((peer = fnetfindpeer(fn, wfrom)) == NULL) /* Assume public chat */
472 fnethandlechat(fn, 1, wfrom, wpeer, chat);
473 else
474 fnethandlechat(fn, 0, wfrom, wpeer, chat);
475 } else {
476 fnethandlechat(fn, 1, L"", wpeer, chat);
477 }
478 if(wfrom != NULL)
479 free(wfrom);
480 free(wpeer);
481 free(chat);
482}
483
484static void peertimeout(int cancelled, struct dcpeer *peer)
485{
486 peer->timeout = NULL;
487 if(cancelled)
488 return;
489 freedcpeer(peer);
490}
491
492static void sendadc(struct socket *sk, char *arg)
493{
494 char *buf;
495 size_t bufsize, bufdata;
496
497 buf = NULL;
498 bufsize = bufdata = 0;
499 addtobuf(buf, ' ');
500 for(; *arg; arg++)
501 {
502 if(*arg == ' ')
503 {
504 bufcat(buf, "\\s", 2);
505 } else if(*arg == '\n') {
506 bufcat(buf, "\\n", 2);
507 } else if(*arg == '\\') {
508 bufcat(buf, "\\\\", 2);
509 } else {
510 addtobuf(buf, *arg);
511 }
512 }
513 sockqueue(sk, buf, bufdata);
514 free(buf);
515}
516
517#if defined(__GNUC__)
518static void __attribute__ ((format (printf, 2, 3))) sendadcf(struct socket *sk, char *arg, ...)
519#else
520static void sendadcf(struct socket *sk, char *arg, ...)
521#endif
522{
523 char *buf;
524 va_list args;
525
526 va_start(args, arg);
527 buf = vsprintf2(arg, args);
528 va_end(args);
529 if(buf == NULL)
530 return;
531 sendadc(sk, buf);
532 free(buf);
533}
534
535static char **parseadc(char *args)
536{
537 char **retbuf;
538 size_t retbufsize, retbufdata;
539 char *buf;
540 size_t bufsize, bufdata;
541 int state;
542
543 retbuf = NULL;
544 buf = NULL;
545 retbufsize = retbufdata = bufsize = bufdata = 0;
546 state = 0;
547 while(state != 3)
548 {
549 switch(state)
550 {
551 case 0:
552 if(*args == 0)
553 state = 3;
554 else if(*args != ' ')
555 state = 1;
556 else
557 args++;
558 break;
559 case 1:
560 if((*args == ' ') || (*args == 0))
561 {
562 addtobuf(buf, 0);
563 addtobuf(retbuf, buf);
564 buf = NULL;
565 bufsize = bufdata = 0;
566 if(*args == 0)
567 state = 3;
568 } else if(*args == '\\') {
569 state = 2;
570 } else {
571 addtobuf(buf, *args);
572 }
573 args++;
574 break;
575 case 2:
576 if(*args == 0)
577 {
578 if(buf != NULL)
579 free(buf);
580 addtobuf(retbuf, NULL);
581 freeparr(retbuf);
582 return(NULL);
583 } else if((*args == 's') || (*args == ' ')) {
584 addtobuf(buf, ' ');
585 } else if(*args == 'n') {
586 addtobuf(buf, '\n');
587 } else if(*args == '\\') {
588 addtobuf(buf, '\\');
589 }
590 args++;
591 state = 1;
592 break;
593 }
594 }
595 if(buf != NULL)
596 free(buf);
597 addtobuf(retbuf, NULL);
598 return(retbuf);
599}
600
601/* Macros useful in command handlers */
602#define skipspace(s) ({if(((s) = strchr((s), ' ')) == NULL) return; else (s)++;})
603#define qstr(sk, str) sockqueue(sk, str, strlen(str))
604#define qstrf(sk, strandargs...) \
605do { \
606 char *__buf__; \
607 if((__buf__ = sprintf2(strandargs)) != NULL) { \
608 sockqueue(sk, __buf__, strlen(__buf__)); \
609 free(__buf__); \
610 } \
611} while(0)
612
613static char *tr(char *str, char *trans)
614{
615 char *p;
616
617 for(; *trans; trans += 2)
618 {
619 for(p = strchr(str, trans[0]); p != NULL; p = strchr(p, trans[0]))
620 *p = trans[1];
621 }
622 return(str);
623}
624
625static char *getadcid(struct dcpeer *peer)
626{
627 char *buf;
628 char *ret;
629 int isfilelist;
630
631 isfilelist = 0;
632 if(!wcscmp(peer->transfer->path, L"files.xml") || !wcscmp(peer->transfer->path, L"files.xml.bz2") || !wcscmp(peer->transfer->path, L"MyList.DcLst"))
633 isfilelist = 1;
634 if(!isfilelist && (peer->transfer->hash != NULL) && isdchash(peer->transfer->hash) && supports(peer, "tthf"))
635 {
636 buf = base32encode(peer->transfer->hash->buf, 24);
637 ret = sprintf2("TTH/%.39s", buf);
638 free(buf);
639 } else {
640 ret = path2adc(peer->transfer->path);
641 }
642 return(ret);
643}
644
645
646static int trresumecb(struct transfer *transfer, wchar_t *cmd, wchar_t *arg, struct dcpeer *peer)
647{
648 if(!wcscmp(cmd, L"resume"))
649 {
650 if(arg == NULL)
651 {
652 flog(LOG_WARNING, "filter returned no position for \"resume\" on transfer %i", transfer->id);
653 freedcpeer(peer);
654 } else {
655 transfer->curpos = wcstoll(arg, NULL, 10);
656 peer->hascurpos = 1;
657 requestfile(peer);
658 }
659 return(1);
660 }
661 return(0);
662}
663
664static void sendmynick(struct dcpeer *peer)
665{
666 struct fnetnode *fn;
667
668 fn = peer->fn;
669 if(fn == NULL)
670 qstrf(peer->sk, "$MyNick %s|", icswcstombs(confgetstr("cli", "defnick"), peer->charset, "DoldaConnectUser-IN"));
671 else
672 qstrf(peer->sk, "$MyNick %s|", icswcstombs(fn->mynick, peer->charset, "DoldaConnectUser-IN"));
673}
674
675static void sendpeerlock(struct dcpeer *peer)
676{
677 if(peer->dcppemu)
678 qstrf(peer->sk, "$Lock EXTENDEDPROTOCOLABCABCABCABCABCABC Pk=DCPLUSPLUS0.674ABCABC|");
679 else
680 qstrf(peer->sk, "$Lock EXTENDEDPROTOCOLABCABCABCABCABCABC Pk=DOLDA%sABCABCABC|", VERSION);
681}
682
683static void sendsupports(struct dcpeer *peer)
684{
685 if(peer->dcppemu) {
686 qstr(peer->sk, "$Supports MiniSlots XmlBZList ADCGet TTHL TTHF GetZBlock ZLIG |");
687 } else {
688 qstr(peer->sk, "$Supports MiniSlots XmlBZList ADCGet TTHL TTHF");
689 if(!confgetint("dc", "hidedeflate"))
690 qstr(peer->sk, " GetZBlock ZLIG");
691 qstr(peer->sk, "|");
692 }
693}
694
695static void requestfile(struct dcpeer *peer)
696{
697 char *buf;
698
699 if(peer->transfer->size == -1)
700 {
701 /* Use DCCHARSET for $Get paths until further researched... */
702 if((buf = path2nmdc(peer->transfer->path, DCCHARSET)) == NULL)
703 {
704 transferseterror(peer->transfer, TRNSE_NOTFOUND);
705 peer->close = 1;
706 return;
707 }
708 /* The transfer will be restarted later from
709 * cmd_filelength when it detects that the sizes
710 * don't match. */
711 qstrf(peer->sk, "$Get %s$1|", buf);
712 free(buf);
713 return;
714 }
715 if((peer->transfer->hash == NULL) && !peer->notthl)
716 {
717 if(supports(peer, "adcget") && supports(peer, "tthl"))
718 {
719 qstr(peer->sk, "$ADCGET");
720 sendadc(peer->sk, "tthl");
721 if((buf = getadcid(peer)) == NULL)
722 {
723 transferseterror(peer->transfer, TRNSE_NOTFOUND);
724 peer->close = 1;
725 return;
726 }
727 sendadc(peer->sk, buf);
728 free(buf);
729 sendadc(peer->sk, "0");
730 sendadc(peer->sk, "-1");
731 qstr(peer->sk, "|");
732 peer->fetchingtthl = 1;
733 return;
734 }
735 }
736 if(!peer->hascurpos)
737 {
738 if(forkfilter(peer->transfer))
739 {
740 flog(LOG_WARNING, "could not fork filter for transfer %i: %s", peer->transfer->id, strerror(errno));
741 peer->close = 1;
742 return;
743 }
744 return;
745 }
746 if(supports(peer, "adcget"))
747 {
748 qstr(peer->sk, "$ADCGET");
749 sendadc(peer->sk, "file");
750 if((buf = getadcid(peer)) == NULL)
751 {
752 transferseterror(peer->transfer, TRNSE_NOTFOUND);
753 peer->close = 1;
754 return;
755 }
756 sendadc(peer->sk, buf);
757 free(buf);
758 sendadcf(peer->sk, "%ji", (intmax_t)peer->transfer->curpos);
759 sendadcf(peer->sk, "%ji", (intmax_t)(peer->transfer->size - peer->transfer->curpos));
760 qstr(peer->sk, "|");
761 } else if(supports(peer, "xmlbzlist")) {
762 if((buf = path2nmdc(peer->transfer->path, "UTF-8")) == NULL)
763 {
764 transferseterror(peer->transfer, TRNSE_NOTFOUND);
765 peer->close = 1;
766 return;
767 }
768 qstrf(peer->sk, "$UGetBlock %ji %ji %s|", (intmax_t)peer->transfer->curpos, (intmax_t)(peer->transfer->size - peer->transfer->curpos), buf);
769 free(buf);
770 } else {
771 /* Use DCCHARSET for $Get paths until further researched... */
772 if((buf = path2nmdc(peer->transfer->path, DCCHARSET)) == NULL)
773 {
774 transferseterror(peer->transfer, TRNSE_NOTFOUND);
775 peer->close = 1;
776 return;
777 }
778 qstrf(peer->sk, "$Get %s$%ji|", buf, (intmax_t)peer->transfer->curpos + 1);
779 free(buf);
780 }
781}
782
783static void sendmyinfo(struct socket *sk, struct fnetnode *fn)
784{
785 struct dchub *hub;
786 char *buf;
787 struct fnetnode *cfn;
788 int hn1, hn2, hn3;
789
790 hub = fn->data;
791 qstrf(sk, "$MyINFO $ALL %s ", hub->nativenick);
792 buf = tr(icswcstombs(confgetstr("dc", "desc"), hub->charset, "Charset_conv_failure"), "$_|_");
793 qstrf(sk, "%s", buf);
794 hn1 = hn2 = hn3 = 0;
795 for(cfn = fnetnodes; cfn != NULL; cfn = cfn->next)
796 {
797 if((cfn->state == FNN_EST) || (cfn->state == FNN_HS))
798 {
799 if(cfn->regstatus == FNNS_OP)
800 hn3++;
801 else if(cfn->regstatus == FNNS_REG)
802 hn2++;
803 else
804 hn1++;
805 }
806 }
807 qstrf(sk, "<%s V:%s,M:%c,H:%i/%i/%i,S:%i>",
808 (hub->dcppemu)?"++":"Dolda",
809 (hub->dcppemu)?"0.674":VERSION,
810 (tcpsock == NULL)?'P':'A',
811 hn1, hn2, hn3,
812 confgetint("transfer", "slots")
813 );
814 qstrf(sk, "$ $");
815 buf = tr(icswcstombs(confgetstr("dc", "speedstring"), hub->charset, "Charset_conv_failure"), "$_|_");
816 qstrf(sk, "%s\x01$", buf);
817 buf = tr(icswcstombs(confgetstr("dc", "email"), hub->charset, "Charset_conv_failure"), "$_|_");
818 qstrf(sk, "%s$", buf);
819 qstrf(sk, "%llu$|", sharesize);
820}
821
822static void hubhandleaction(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
823{
824 struct dchub *hub;
825
826 hub = fn->data;
827 if(!strcmp(cmd, "$Lock"))
828 {
829 qstrf(sk, "$ValidateNick %s|", hub->nativenick);
830 } else if(!strcmp(cmd, "$Hello")) {
831 if(fn->state == FNN_HS)
832 {
833 qstrf(sk, "$Version 1,0091|");
834 qstrf(sk, "$GetNickList|");
835 sendmyinfo(sk, fn);
836 fnetsetstate(fn, FNN_EST);
837 } else {
838 qstrf(sk, "$GetINFO %s %s|", args, hub->nativenick);
839 }
840 }
841}
842
843static void cmd_lock(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
844{
845 struct dchub *hub;
846 char *key;
847 char *p;
848
849 hub = fn->data;
850 if(!strncmp(args, "EXTENDEDPROTOCOL", 16))
851 hub->extended = 1;
852 if((p = strchr(args, ' ')) != NULL)
853 *(p++) = 0;
854 if(hub->extended)
855 {
856 if(hub->dcppemu) {
857 qstrf(sk, "$Supports UserCommand NoGetINFO NoHello UserIP2 TTHSearch GetZBlock |");
858 } else {
859 qstrf(sk, "$Supports UserCommand NoGetINFO NoHello UserIP2 TTHSearch");
860 if(!confgetint("dc", "hidedeflate"))
861 qstr(sk, " GetZBlock");
862 qstr(sk, "|");
863 }
864 }
865 key = dcmakekey(args);
866 qstrf(sk, "$Key %s|", key);
867 free(key);
868 hubhandleaction(sk, fn, cmd, args);
869}
870
871static void cmd_hubname(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
872{
873 wchar_t *buf;
874 struct dchub *hub;
875
876 hub = fn->data;
877 if(hub->nativename != NULL)
878 free(hub->nativename);
879 hub->nativename = sstrdup(args);
880 buf = icmbstowcs(args, hub->charset);
881 fnetsetname(fn, (buf == NULL)?L"Hubname conv error":buf);
882 if(buf != NULL)
883 free(buf);
884 hubhandleaction(sk, fn, cmd, args);
885}
886
887static void cmd_hello(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
888{
889 wchar_t *nick;
890 struct dchub *hub;
891
892 hub = fn->data;
893 if((nick = icmbstowcs(args, hub->charset)) == NULL)
894 return;
895 if(strcmp(args, hub->nativenick) && (fnetfindpeer(fn, nick) == NULL))
896 fnetaddpeer(fn, nick, nick);
897 free(nick);
898 hubhandleaction(sk, fn, cmd, args);
899}
900
901static void cmd_quit(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
902{
903 wchar_t *nick;
904 struct fnetpeer *peer;
905 struct dchub *hub;
906
907 hub = fn->data;
908 if((nick = icmbstowcs(args, hub->charset)) == NULL)
909 return;
910 if((peer = fnetfindpeer(fn, nick)) != NULL)
911 fnetdelpeer(peer);
912 free(nick);
913 hubhandleaction(sk, fn, cmd, args);
914}
915
916static void cmd_nicklist(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
917{
918 struct dchub *hub;
919 char *p;
920 wchar_t *buf;
921 struct fnetpeer *peer;
922
923 hub = fn->data;
924 for(peer = btreeiter(fn->peers); peer != NULL; peer = btreeiter(NULL))
925 peer->flags.b.delete = 1;
926 while((p = strstr(args, "$$")) != NULL)
927 {
928 *p = 0;
929 if((buf = icmbstowcs(args, hub->charset)) != NULL)
930 {
931 if((peer = fnetfindpeer(fn, buf)) == NULL)
932 peer = fnetaddpeer(fn, buf, buf);
933 else
934 peer->flags.b.delete = 0;
935 free(buf);
936 qstrf(sk, "$GetINFO %s %s|", args, hub->nativenick);
937 }
938 args = p + 2;
939 }
940 fnetpeerdm(fn);
941 hubhandleaction(sk, fn, cmd, args);
942}
943
944static void cmd_oplist(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
945{
946 struct dchub *hub;
947 char *p;
948 wchar_t *buf;
949 struct fnetpeer *peer;
950
951 hub = fn->data;
952 for(peer = btreeiter(fn->peers); peer != NULL; peer = btreeiter(NULL))
953 peer->flags.b.op = 0;
954 while((p = strstr(args, "$$")) != NULL)
955 {
956 *p = 0;
957 if((buf = icmbstowcs(args, hub->charset)) != NULL)
958 {
959 if((peer = fnetfindpeer(fn, buf)) != NULL)
960 peer->flags.b.op = 1;
961 free(buf);
962 }
963 args = p + 2;
964 }
965 hubhandleaction(sk, fn, cmd, args);
966}
967
968static void cmd_myinfo(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
969{
970 char *p, *p2;
971 wchar_t *buf, *wp, *wp2;
972 wchar_t abuf[10];
973 struct fnetpeer *peer;
974 struct dchub *hub;
975
976 hub = fn->data;
977 p = args;
978 if(strncmp(p, "$ALL ", 5))
979 return;
980 p += 5;
981 if((p2 = strchr(p, ' ')) == NULL)
982 return;
983 *p2 = 0;
984 if((buf = icmbstowcs(p, hub->charset)) == NULL)
985 return;
986 if((peer = fnetfindpeer(fn, buf)) == NULL)
987 peer = fnetaddpeer(fn, buf, buf);
988 free(buf);
989 p = p2 + 1;
990 if((p2 = strstr(p, "$ $")) == NULL)
991 return;
992 *p2 = 0;
993 if((buf = icmbstowcs(p, hub->charset)) == NULL)
994 return;
995 if((wcslen(buf) > 0) && (buf[wcslen(buf) - 1] == L'>') && ((wp = wcsrchr(buf, L'<')) != NULL))
996 {
997 buf[wcslen(buf) - 1] = L'\0';
998 *(wp++) = L'\0';
999 if((wp2 = wcschr(wp, L' ')) != NULL)
1000 {
1001 *(wp2++) = L'\0';
1002 fnetpeersetstr(peer, L"dc-client", wp);
1003 wp = wp2;
1004 do
1005 {
1006 if((wp2 = wcschr(wp, L',')) != NULL)
1007 *(wp2++) = L'\0';
1008 if(wp[1] != L':')
1009 continue;
1010 swprintf(abuf, 10, L"dc-tag-%lc", wp[0]);
1011 fnetpeersetstr(peer, abuf, wp + 2);
1012 wp = wp2;
1013 } while(wp2 != NULL);
1014 }
1015 }
1016 fnetpeersetstr(peer, L"descr", buf);
1017 free(buf);
1018 p = p2 + 3;
1019 if((p2 = strchr(p, '$')) == NULL)
1020 return;
1021 *(p2 - 1) = 0;
1022 if((buf = icmbstowcs(p, hub->charset)) == NULL)
1023 return;
1024 fnetpeersetstr(peer, L"dc-speed", buf);
1025 free(buf);
1026 p = p2 + 1;
1027 if((p2 = strchr(p, '$')) == NULL)
1028 return;
1029 *p2 = 0;
1030 if((buf = icmbstowcs(p, hub->charset)) == NULL)
1031 return;
1032 fnetpeersetstr(peer, L"email", buf);
1033 free(buf);
1034 p = p2 + 1;
1035 if(strlen(p) < 1)
1036 return;
1037 fnetpeersetlnum(peer, L"share", strtoll(p, NULL, 10));
1038 hubhandleaction(sk, fn, cmd, args);
1039}
1040
1041/* I do not implement the fully in that I do not disconnect from the
1042 * old hub. I do this since I believe that if the hub owner really
1043 * wants to get rid of us, then it is his responsibility to disconnect
1044 * us. */
1045static void cmd_forcemove(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
1046{
1047 struct dchub *hub;
1048 struct fnetnode *newfn;
1049 int freeargs;
1050
1051 hub = fn->data;
1052 if(strchr(args, ':') == NULL)
1053 {
1054 args = strcpy(smalloc(strlen(args) + 5), args);
1055 strcat(args, ":411");
1056 freeargs = 1;
1057 } else {
1058 freeargs = 0;
1059 }
1060 if((newfn = fnetinitconnect(L"dc", fn->owner, args, NULL)) != NULL)
1061 {
1062 linkfnetnode(newfn);
1063 putfnetnode(newfn);
1064 }
1065 hubhandleaction(sk, fn, cmd, args);
1066 if(freeargs)
1067 free(args);
1068}
1069
1070static char *getdcpath(struct sharecache *node, size_t *retlen, char *charset)
1071{
1072 char *buf, *buf2;
1073 size_t len, len2;
1074
1075 if(node->parent == NULL)
1076 return(NULL);
1077 if(node->parent == shareroot)
1078 {
1079 if((buf = icwcstombs(node->name, charset)) == NULL)
1080 return(NULL);
1081 if(retlen != NULL)
1082 *retlen = strlen(buf);
1083 return(buf);
1084 } else {
1085 if((buf2 = icwcstombs(node->name, charset)) == NULL)
1086 return(NULL);
1087 if((buf = getdcpath(node->parent, &len, charset)) == NULL)
1088 {
1089 free(buf2);
1090 return(NULL);
1091 }
1092 len2 = strlen(buf2);
1093 buf = srealloc(buf, len + 1 + len2 + 1);
1094 buf[len++] = '\\';
1095 strcpy(buf + len, buf2);
1096 buf[len + len2] = 0;
1097 free(buf2);
1098 if(retlen != NULL)
1099 *retlen = len + len2;
1100 return(buf);
1101 }
1102}
1103
1104/*
1105 * This is the main share searching function for Direct Connect
1106 * peers. Feel free to optimize it if you feel the need for it. I
1107 * haven't ever seen it take any noticable CPU time anyway, so I
1108 * haven't felt that need.
1109 *
1110 * It may feel dubious to just return the directory when all terms are
1111 * satisfied rather than all the files in it, but it really benefits
1112 * everyone: Less cycles used for us, less UDP squelching for active
1113 * searchers, and less bandwidth waste for hubs when serving passive
1114 * searchers.
1115 */
1116static void cmd_search(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
1117{
1118 int i, done;
1119 struct dchub *hub;
1120 char *p, *p2;
1121 char *prefix, *infix, *postfix, *buf, *buf2;
1122 struct socket *dsk;
1123 struct sockaddr_in addr;
1124 struct sharecache *node;
1125 int minsize, maxsize;
1126 int dotth;
1127 size_t buflen;
1128 int termnum, satisfied, skipcheck;
1129 int level, tersat[32];
1130 wchar_t *terms[32], *lname;
1131 char hashtth[24];
1132
1133 hub = fn->data;
1134 if((p = strchr(args, ' ')) == NULL)
1135 return;
1136 *(p++) = 0;
1137
1138 memset(terms, 0, sizeof(terms));
1139 prefix = infix = postfix = NULL;
1140 dsk = NULL;
1141 dotth = 0;
1142
1143 if(!strncmp(args, "Hub:", 4))
1144 {
1145 if(!strcmp(cmd, "$MultiSearch"))
1146 goto out;
1147 if(!strcmp(args + 4, hub->nativenick))
1148 goto out;
1149 prefix = sprintf2("$SR %s ", hub->nativenick);
1150 infix = sprintf2(" %i/%i\005", slotsleft(), confgetint("transfer", "slots"));
1151 postfix = sprintf2(" (%s)\005%s|", formatsockpeer(hub->sk), args + 4);
1152 dsk = sk;
1153 getsock(dsk);
1154 } else {
1155 if((p2 = strchr(args, ':')) == NULL)
1156 goto out;
1157 *(p2++) = 0;
1158 addr.sin_family = AF_INET;
1159 if(!inet_aton(args, &addr.sin_addr))
1160 goto out;
1161 addr.sin_port = htons(atoi(p2));
1162 prefix = sprintf2("$SR %s ", hub->nativenick);
1163 infix = sprintf2(" %i/%i\005", slotsleft(), confgetint("transfer", "slots"));
1164 postfix = sprintf2(" (%s)|", formatsockpeer(hub->sk));
1165 dsk = netdgramconn(udpsock, (struct sockaddr *)&addr, sizeof(addr));
1166 }
1167
1168 minsize = maxsize = -1;
1169 if(*p == 0)
1170 goto out;
1171 if(*(p++) == 'T')
1172 minsize = 0;
1173 if(*(p++) != '?')
1174 goto out;
1175 if(*p == 0)
1176 goto out;
1177 if((*(p++) == 'T') && (minsize == 0))
1178 {
1179 maxsize = 0;
1180 minsize = -1;
1181 }
1182 if(*(p++) != '?')
1183 goto out;
1184 if((p2 = strchr(p, '?')) == NULL)
1185 goto out;
1186 *(p2++) = 0;
1187 if(minsize == 0)
1188 minsize = atoi(p);
1189 if(maxsize == 0)
1190 maxsize = atoi(p);
1191 p = p2 + 1;
1192 if(*(p++) != '?')
1193 goto out;
1194 termnum = 0;
1195 p2 = p;
1196 done = 0;
1197 while(!done)
1198 {
1199 if((*p2 == 0) || (*p2 == '$'))
1200 {
1201 if(*p2 == 0)
1202 done = 1;
1203 else
1204 *p2 = 0;
1205 if(*p)
1206 {
1207 if(!dotth && !strncmp(p, "TTH:", 4))
1208 {
1209 dotth = 1;
1210 if(((buf = base32decode(p + 4, &buflen)) == NULL) || (buflen != 24))
1211 {
1212 free(buf);
1213 goto out;
1214 }
1215 memcpy(hashtth, buf, 24);
1216 free(buf);
1217 } else {
1218 if((terms[termnum] = icmbstowcs(p, hub->charset)) != NULL) {
1219 wcslower(terms[termnum]);
1220 termnum++;
1221 }
1222 }
1223 }
1224 p = p2 + 1;
1225 if(termnum == 32)
1226 break;
1227 }
1228 p2++;
1229 }
1230
1231 node = shareroot->child;
1232 level = 0;
1233 for(i = 0; i < termnum; i++)
1234 tersat[i] = -1;
1235 satisfied = 0;
1236 while(1)
1237 {
1238 skipcheck = 0;
1239 if(node->f.b.type == FILE_REG)
1240 {
1241 if((minsize >= 0) && (node->size < minsize))
1242 skipcheck = 1;
1243 if((maxsize >= 0) && (node->size > maxsize))
1244 skipcheck = 1;
1245 }
1246 if(!skipcheck && dotth)
1247 {
1248 if((node->f.b.type != FILE_REG) || (node->f.b.hastth && memcmp(hashtth, node->hashtth, 24)))
1249 skipcheck = 1;
1250 }
1251 if(!skipcheck)
1252 {
1253 lname = wcslower(swcsdup(node->name));
1254 for(i = 0; i < termnum; i++)
1255 {
1256 if(tersat[i] >= 0)
1257 continue;
1258 if(wcsstr(lname, terms[i]))
1259 {
1260 tersat[i] = level;
1261 satisfied++;
1262 } else if(node->child == NULL) {
1263 break;
1264 }
1265 }
1266 free(lname);
1267 }
1268 if(!skipcheck && (satisfied == termnum))
1269 {
1270 /* Use DCCHARSET in $Get paths until further researched... */
1271 if((buf = getdcpath(node, NULL, DCCHARSET)) != NULL)
1272 {
1273 if(node->f.b.hastth)
1274 {
1275 buf2 = base32encode(node->hashtth, 24);
1276 qstrf(dsk, "%s%s\005%ji%sTTH:%.39s%s", prefix, buf, (intmax_t)node->size, infix, buf2, postfix);
1277 free(buf2);
1278 } else {
1279 qstrf(dsk, "%s%s\005%ji%s%s%s", prefix, buf, (intmax_t)node->size, infix, hub->nativename, postfix);
1280 }
1281 free(buf);
1282 }
1283 }
1284 if((!skipcheck && (satisfied == termnum)) || (node->child == NULL))
1285 {
1286 while(node->next == NULL)
1287 {
1288 if((node = node->parent) == shareroot)
1289 break;
1290 level--;
1291 }
1292 if(node == shareroot)
1293 break;
1294 for(i = 0; i < termnum; i++)
1295 {
1296 if(tersat[i] >= level)
1297 {
1298 tersat[i] = -1;
1299 satisfied--;
1300 }
1301 }
1302 node = node->next;
1303 } else {
1304 node = node->child;
1305 level++;
1306 }
1307 }
1308
1309 hubhandleaction(sk, fn, cmd, args);
1310
1311 out:
1312 if(dsk != NULL)
1313 putsock(dsk);
1314 if(prefix != NULL)
1315 free(prefix);
1316 if(infix != NULL)
1317 free(infix);
1318 if(postfix != NULL)
1319 free(postfix);
1320 for(i = 0; (i < 32) && (terms[i] != NULL); i++)
1321 free(terms[i]);
1322}
1323
1324static void cmd_connecttome(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
1325{
1326 char *p;
1327 struct dchub *hub;
1328 struct sockaddr_in addr;
1329
1330 hub = fn->data;
1331 if((p = strchr(args, ' ')) == NULL)
1332 return;
1333 *(p++) = 0;
1334 if(strcmp(args, hub->nativenick))
1335 return;
1336 addr.sin_family = AF_INET;
1337 args = p;
1338 if((p = strchr(args, ':')) == NULL)
1339 return;
1340 *(p++) = 0;
1341 addr.sin_port = htons(atoi(p));
1342 if(!inet_aton(args, &addr.sin_addr))
1343 return;
1344 putsock(netcsconn((struct sockaddr *)&addr, sizeof(addr), (void (*)(struct socket *, int, void *))peerconnect, fn));
1345 getfnetnode(fn);
1346 hubhandleaction(sk, fn, cmd, args);
1347}
1348
1349static void sendctm(struct socket *sk, char *nick)
1350{
1351 struct sockaddr *addr;
1352 socklen_t addrlen;
1353
1354 if(tcpsock == NULL)
1355 return;
1356 if(lstgetremotename2(tcpsock, sk, &addr, &addrlen) < 0)
1357 return;
1358 if(addr->sa_family == AF_INET)
1359 qstrf(sk, "$ConnectToMe %s %s|", nick, formataddress(addr, addrlen));
1360 else
1361 flog(LOG_WARNING, "Direct Connect TCP socket is suddenly not AF_INET, but %i", addr->sa_family);
1362 free(addr);
1363}
1364
1365static void cmd_revconnecttome(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
1366{
1367 struct dchub *hub;
1368 char *p;
1369
1370 hub = fn->data;
1371 if((p = strchr(args, ' ')) == NULL)
1372 return;
1373 *(p++) = 0;
1374 if(strcmp(p, hub->nativenick))
1375 return;
1376 sendctm(sk, args);
1377 expectpeer(args, fn);
1378 hubhandleaction(sk, fn, cmd, args);
1379}
1380
1381static void cmd_getnetinfo(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
1382{
1383 struct dchub *hub;
1384 struct fnetnode *node;
1385 int numhubs;
1386
1387 hub = fn->data;
1388 numhubs = 0;
1389 for(node = fnetnodes; node != NULL; node = node->next)
1390 {
1391 if(node->state == FNN_EST)
1392 numhubs++;
1393 }
1394 qstrf(sk, "$NetInfo %i$%i$%c$0|", confgetint("transfer", "slots"), numhubs, (tcpsock == NULL)?'P':'A');
1395 hubhandleaction(sk, fn, cmd, args);
1396}
1397
1398static void cmd_to(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
1399{
1400 struct dchub *hub;
1401 char *p, *p2;
1402
1403 hub = fn->data;
1404 p = args;
1405 if((p2 = strchr(p, ' ')) == NULL)
1406 return;
1407 *(p2++) = 0;
1408 p = p2;
1409 if((p2 = strchr(p, ' ')) == NULL)
1410 return;
1411 *(p2++) = 0;
1412 if(strcmp(p, "From:"))
1413 return;
1414 p = p2;
1415 if((p2 = strstr(p, " $")) == NULL)
1416 return;
1417 *p2 = 0;
1418 p2 += 2;
1419 hubrecvchat(hub->sk, fn, p, p2);
1420 hubhandleaction(sk, fn, cmd, args);
1421}
1422
1423static void cmd_sr(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
1424{
1425 struct dchub *hub;
1426 char *p, *p2, *buf;
1427 char *nick, *filename, *hubname;
1428 off_t size;
1429 int slots;
1430 size_t buflen;
1431 struct srchres *sr;
1432 wchar_t *wnick, *wfile;
1433
1434 hub = fn->data;
1435 nick = p = args;
1436 if((p2 = strchr(p, ' ')) == NULL)
1437 return;
1438 *p2 = 0;
1439 p = p2 + 1;
1440 filename = p;
1441 if((p2 = strchr(p, 5)) == NULL)
1442 return;
1443 *p2 = 0;
1444 p = p2 + 1;
1445 if((p2 = strchr(p, ' ')) == NULL)
1446 return;
1447 *p2 = 0;
1448 size = strtoll(p, NULL, 10);
1449 p = p2 + 1;
1450 if((p2 = strchr(p, '/')) == NULL)
1451 return;
1452 *p2 = 0;
1453 slots = atoi(p);
1454 p = p2 + 1;
1455 if((p2 = strchr(p, 5)) == NULL)
1456 return;
1457 p = p2 + 1;
1458 hubname = p;
1459 if((p2 = strstr(p, " (")) == NULL)
1460 return;
1461 *p2 = 0;
1462 if((wnick = icmbstowcs(nick, hub->charset)) == NULL)
1463 return;
1464 /* Use DCCHARSET in $Get paths until further researched... */
1465 if((wfile = nmdc2path(filename, DCCHARSET)) == NULL)
1466 {
1467 free(wnick);
1468 return;
1469 }
1470 sr = newsrchres(&dcnet, wfile, wnick);
1471 if(sr->peernick != NULL)
1472 free(sr->peernick);
1473 sr->peernick = swcsdup(wnick);
1474 sr->size = size;
1475 sr->slots = slots;
1476 free(wfile);
1477 free(wnick);
1478 if(!strncmp(hubname, "TTH:", 4))
1479 {
1480 if((buf = base32decode(hubname + 4, &buflen)) != NULL)
1481 {
1482 if(buflen == 24)
1483 sr->hash = newhash(L"TTH", 24, buf);
1484 free(buf);
1485 }
1486 }
1487 getfnetnode(sr->fn = fn);
1488 submitsrchres(sr);
1489 freesrchres(sr);
1490 hubhandleaction(sk, fn, cmd, args);
1491}
1492
1493static void cmd_usercommand(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
1494{
1495 /* Do nothing for now. */
1496}
1497
1498static void cmd_getpass(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
1499{
1500 struct dchub *hub;
1501 wchar_t *pw;
1502 char *mbspw;
1503
1504 hub = fn->data;
1505 pw = wpfind(fn->args, L"password");
1506 if((pw == NULL) || ((mbspw = icwcstombs(pw, hub->charset)) == NULL))
1507 {
1508 killfnetnode(fn);
1509 return;
1510 }
1511 qstrf(sk, "$MyPass %s|", mbspw);
1512 free(mbspw);
1513 fn->regstatus = FNNS_REG;
1514 hubhandleaction(sk, fn, cmd, args);
1515}
1516
1517static void cmd_logedin(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
1518{
1519 struct dchub *hub;
1520
1521 hub = fn->data;
1522 fn->regstatus = FNNS_OP;
1523 hubhandleaction(sk, fn, cmd, args);
1524}
1525
1526static void cmd_hubsupports(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
1527{
1528 struct dchub *hub;
1529 int i;
1530 char *p, *p2;
1531 char **arr;
1532 size_t arrsize, arrdata;
1533
1534 hub = fn->data;
1535 if(hub->supports != NULL)
1536 {
1537 for(i = 0; hub->supports[i] != NULL; i++)
1538 free(hub->supports[i]);
1539 free(hub->supports);
1540 }
1541 arr = NULL;
1542 arrsize = arrdata = 0;
1543 p = args;
1544 do
1545 {
1546 if((p2 = strchr(p, ' ')) != NULL)
1547 *(p2++) = 0;
1548 if(*p == 0)
1549 continue;
1550 addtobuf(arr, sstrdup(p));
1551 } while((p = p2) != NULL);
1552 addtobuf(arr, NULL);
1553 hub->supports = arr;
1554}
1555
1556static void cmd_mynick(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1557{
1558 struct dcexppeer *expect;
1559 struct dchub *hub;
1560
1561 if(peer->nativename != NULL)
1562 free(peer->nativename);
1563 peer->nativename = sstrdup(args);
1564 if(peer->wcsname != NULL)
1565 free(peer->wcsname);
1566 if((peer->wcsname = icmbstowcs(peer->nativename, peer->charset)) == NULL)
1567 {
1568 peer->close = 1;
1569 return;
1570 }
1571 if(peer->accepted)
1572 {
1573 for(expect = expected; expect != NULL; expect = expect->next)
1574 {
1575 if(!strcmp(expect->nick, args))
1576 break;
1577 }
1578 if(expect == NULL)
1579 {
1580 peer->fn = NULL;
1581 } else {
1582 hub = expect->fn->data;
1583 peer->fn = expect->fn;
1584 getfnetnode(peer->fn);
1585 peer->dcppemu = hub->dcppemu;
1586 freeexppeer(expect);
1587 }
1588 }
1589}
1590
1591static void peerattach(struct dcpeer *peer, struct transfer *transfer)
1592{
1593 peer->transfer = transfer;
1594 CBREG(peer->transfer, trans_filterout, (int (*)(struct transfer *, wchar_t *, wchar_t *, void *))trresumecb, NULL, peer);
1595 CBREG(peer->transfer, trans_destroy, (int (*)(struct transfer *, void *))trdestroycb, NULL, peer);
1596}
1597
1598static void cmd_direction(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1599{
1600 char *p;
1601 int mydir;
1602 struct transfer *transfer;
1603
1604 if((p = strchr(args, ' ')) == NULL)
1605 return;
1606 *p = 0;
1607 if(!strcmp(args, "Upload"))
1608 mydir = TRNSD_DOWN;
1609 if(!strcmp(args, "Download"))
1610 mydir = TRNSD_UP;
1611 if(peer->accepted)
1612 {
1613 if((peer->transfer == NULL) || (mydir != peer->direction))
1614 {
1615 peer->close = 1;
1616 return;
1617 }
1618 if(peer->direction == TRNSD_DOWN)
1619 requestfile(peer);
1620 } else {
1621 if(peer->wcsname == NULL)
1622 {
1623 peer->close = 1;
1624 return;
1625 }
1626 peer->direction = mydir;
1627 if(peer->direction == TRNSD_UP)
1628 {
1629 if(confgetint("transfer", "ulquota") && hasupload(&dcnet, peer->wcsname))
1630 {
1631 peer->close = 1;
1632 return;
1633 }
1634 transfer = newupload(peer->fn, &dcnet, peer->wcsname, (peer->trpipe = mktrpipe(peer))->back);
1635 } else {
1636 if((transfer = finddownload(peer->wcsname)) == NULL)
1637 {
1638 peer->close = 1;
1639 return;
1640 }
1641 transferattach(transfer, (peer->trpipe = mktrpipe(peer))->back);
1642 transfersetstate(transfer, TRNS_HS);
1643 }
1644 transfersetnick(transfer, peer->wcsname);
1645 peerattach(peer, transfer);
1646 if(peer->extended)
1647 sendsupports(peer);
1648 qstrf(sk, "$Direction %s %i|", (peer->direction == TRNSD_UP)?"Upload":"Download", rand() % 10000);
1649 if(peer->key != NULL)
1650 qstrf(sk, "$Key %s|", peer->key);
1651 if(peer->direction == TRNSD_DOWN)
1652 requestfile(peer);
1653 }
1654}
1655
1656static void cmd_peerlock(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1657{
1658 char *p, *key;
1659 struct transfer *transfer;
1660
1661 if((p = strchr(args, ' ')) == NULL)
1662 return;
1663 *p = 0;
1664 if(!strncmp(args, "EXTENDEDPROTOCOL", 16))
1665 peer->extended = 1;
1666 key = dcmakekey(args);
1667 if(peer->accepted)
1668 {
1669 if(peer->wcsname == NULL)
1670 {
1671 peer->close = 1;
1672 return;
1673 }
1674 sendmynick(peer);
1675 sendpeerlock(peer);
1676 if(peer->extended)
1677 sendsupports(peer);
1678 if((transfer = finddownload(peer->wcsname)) == NULL)
1679 {
1680 if(confgetint("transfer", "ulquota") && hasupload(&dcnet, peer->wcsname))
1681 {
1682 peer->close = 1;
1683 return;
1684 }
1685 peer->direction = TRNSD_UP;
1686 transfer = newupload(peer->fn, &dcnet, peer->wcsname, (peer->trpipe = mktrpipe(peer))->back);
1687 } else {
1688 peer->direction = TRNSD_DOWN;
1689 transferattach(transfer, (peer->trpipe = mktrpipe(peer))->back);
1690 transfersetstate(transfer, TRNS_HS);
1691 }
1692 transfersetnick(transfer, peer->wcsname);
1693 peerattach(peer, transfer);
1694 qstrf(sk, "$Direction %s %i|", (peer->direction == TRNSD_UP)?"Upload":"Download", rand() % 10000);
1695 qstrf(sk, "$Key %s|", key);
1696 free(key);
1697 } else {
1698 if(peer->key != NULL)
1699 free(peer->key);
1700 peer->key = key;
1701 }
1702}
1703
1704static void cmd_key(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1705{
1706 /* NOP */
1707}
1708
1709static void startdl(struct dcpeer *peer)
1710{
1711 if(peer->timeout != NULL)
1712 canceltimer(peer->timeout);
1713 peer->state = PEER_TRNS;
1714 transferstartdl(peer->transfer, peer->sk);
1715 peer->sk->readcb = (void (*)(struct socket *, void *))transread;
1716 peer->sk->errcb = (void (*)(struct socket *, int, void *))transerr;
1717}
1718
1719static void startul(struct dcpeer *peer)
1720{
1721 if(peer->timeout != NULL)
1722 canceltimer(peer->timeout);
1723 peer->state = PEER_TRNS;
1724 transferstartul(peer->transfer, peer->sk);
1725 peer->sk->writecb = (void (*)(struct socket *, void *))transwrite;
1726 transwrite(peer->sk, peer);
1727}
1728
1729static void cmd_filelength(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1730{
1731 off_t size;
1732 struct transfer *transfer;
1733
1734 if(peer->transfer == NULL)
1735 {
1736 peer->close = 1;
1737 return;
1738 }
1739 size = strtoll(args, NULL, 10);
1740 if(peer->transfer->size != size)
1741 {
1742 transfersetsize(peer->transfer, size);
1743 transfer = peer->transfer;
1744 peer->close = 1;
1745 resettransfer(transfer);
1746 trytransferbypeer(transfer->fnet, transfer->peerid);
1747 return;
1748 }
1749 startdl(peer);
1750 qstr(peer->sk, "$Send|");
1751}
1752
1753static void cmd_error(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1754{
1755 if(peer->fetchingtthl)
1756 {
1757 peer->fetchingtthl = 0;
1758 peer->notthl = 1;
1759 requestfile(peer);
1760 return;
1761 }
1762 if((peer->transfer != NULL) && (peer->transfer->dir == TRNSD_DOWN))
1763 {
1764 transferseterror(peer->transfer, TRNSE_NOTFOUND);
1765 resettransfer(peer->transfer);
1766 return;
1767 }
1768 peer->close = 1;
1769}
1770
1771static void cmd_maxedout(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1772{
1773 if((peer->transfer != NULL) && (peer->transfer->dir == TRNSD_DOWN))
1774 {
1775 transferseterror(peer->transfer, TRNSE_NOSLOTS);
1776 resettransfer(peer->transfer);
1777 return;
1778 }
1779 peer->close = 1;
1780}
1781
1782static struct
1783{
1784 char *name;
1785 char **file;
1786 void (*func)(void);
1787} lists[] =
1788{
1789 {"MyList.DcLst", &hmlistname, updatehmlist},
1790 {"files.xml", &xmllistname, updatexmllist},
1791 {"files.xml.bz2", &xmlbz2listname, updatexmlbz2list},
1792 {NULL, NULL}
1793};
1794
1795static int openfilelist(char *name)
1796{
1797 int i, fd;
1798 int errnobak;
1799
1800 for(i = 0; lists[i].name != NULL; i++)
1801 {
1802 if(!strcmp(name, lists[i].name))
1803 break;
1804 }
1805 errno = 0;
1806 if(lists[i].name == NULL)
1807 return(-1);
1808 fd = -1;
1809 if((*lists[i].file == NULL) || ((fd = open(*lists[i].file, O_RDONLY)) < 0))
1810 lists[i].func();
1811 if((fd < 0) && ((*lists[i].file == NULL) || ((fd = open(*lists[i].file, O_RDONLY)) < 0)))
1812 {
1813 errnobak = errno;
1814 flog(LOG_ERR, "could not open filelist tempfile: %s", strerror(errno));
1815 errno = errnobak;
1816 return(-1);
1817 }
1818 return(fd);
1819}
1820
1821static struct sharecache *findbytth(char *tth32)
1822{
1823 char *buf;
1824 size_t buflen;
1825 struct sharecache *node;
1826
1827 if((buf = base32decode(tth32, &buflen)) == NULL)
1828 return(NULL);
1829 if(buflen != 24)
1830 {
1831 free(buf);
1832 return(NULL);
1833 }
1834 for(node = shareroot->child; node != NULL; node = nextscnode(node))
1835 {
1836 if(node->f.b.hastth && !memcmp(node->hashtth, buf, 24))
1837 break;
1838 }
1839 free(buf);
1840 return(node);
1841}
1842
1843static struct sharecache *resdcpath(char *path, char *charset, char sep)
1844{
1845 struct sharecache *node;
1846 char *p, *p2;
1847
1848 node = shareroot;
1849 p = path;
1850 while(p != NULL)
1851 {
1852 if((p2 = strchr(p, sep)) != NULL)
1853 *(p2++) = 0;
1854 if((node = findcache(node, icsmbstowcs(p, charset, L""))) == NULL)
1855 return(NULL);
1856 p = p2;
1857 }
1858 return(node);
1859}
1860
1861static void cmd_get(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1862{
1863 off_t offset;
1864 char *p, *buf;
1865 wchar_t *buf2;
1866 struct sharecache *node;
1867 struct socket *lesk;
1868 int fd;
1869 struct stat sb;
1870
1871 if(peer->transfer == NULL)
1872 {
1873 peer->close = 1;
1874 return;
1875 }
1876 if((p = strchr(args, '$')) == NULL)
1877 {
1878 peer->close = 1;
1879 return;
1880 }
1881 *(p++) = 0;
1882 if((offset = (strtoll(p, NULL, 10) - 1)) < 0)
1883 {
1884 peer->close = 1;
1885 return;
1886 }
1887 if(((fd = openfilelist(args)) < 0) && (errno != 0))
1888 {
1889 qstr(sk, "$Error Could not send file list|");
1890 peer->close = 1;
1891 return;
1892 } else if(fd >= 0) {
1893 if((buf2 = nmdc2path(args, DCCHARSET)) != NULL) {
1894 transfersetpath(peer->transfer, buf2);
1895 free(buf2);
1896 }
1897 peer->transfer->flags.b.minislot = 1;
1898 }
1899 if(fd < 0)
1900 {
1901 /* Use DCCHARSET in $Get paths until further researched... */
1902 if((node = resdcpath(args, DCCHARSET, '\\')) == NULL)
1903 {
1904 qstrf(sk, "$Error File not in share|");
1905 peer->close = 1;
1906 return;
1907 }
1908 if((fd = opensharecache(node)) < 0)
1909 {
1910 qstrf(sk, "$Error %s|", strerror(errno));
1911 peer->close = 1;
1912 return;
1913 }
1914 buf = getfspath(node);
1915 if((buf2 = icsmbstowcs(buf, NULL, NULL)) == NULL)
1916 flog(LOG_WARNING, "could not convert native path into a wcs (%s): %s", buf, strerror(errno));
1917 else
1918 transfersetpath(peer->transfer, buf2);
1919 free(buf);
1920 }
1921 if(fstat(fd, &sb) < 0)
1922 {
1923 close(fd);
1924 flog(LOG_WARNING, "could not stat file %ls: %s", node->name, strerror(errno));
1925 qstrf(sk, "$Error|");
1926 peer->close = 1;
1927 return;
1928 }
1929 if(sb.st_size < 65536)
1930 peer->transfer->flags.b.minislot = 1;
1931 if(!peer->transfer->flags.b.minislot && (slotsleft() < 1)) {
1932 close(fd);
1933 qstr(sk, "$MaxedOut|");
1934 peer->close = 1;
1935 return;
1936 }
1937 if((offset != 0) && (lseek(fd, offset, SEEK_SET) < 0))
1938 {
1939 close(fd);
1940 qstrf(sk, "$Error Offset out of range|");
1941 peer->close = 1;
1942 return;
1943 }
1944 lesk = wrapsock(fd);
1945 transferprepul(peer->transfer, sb.st_size, offset, -1, lesk);
1946 putsock(lesk);
1947 qstrf(sk, "$FileLength %ji|", (intmax_t)peer->transfer->size);
1948}
1949
1950static void cmd_send(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1951{
1952 if(peer->transfer == NULL)
1953 {
1954 peer->close = 1;
1955 return;
1956 }
1957 if(peer->transfer->localend == NULL)
1958 {
1959 peer->close = 1;
1960 return;
1961 }
1962 peer->ptclose = 1;
1963 startul(peer);
1964}
1965
1966static void cmd_supports(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1967{
1968 int i;
1969 char *p, *p2;
1970 char **arr;
1971 size_t arrsize, arrdata;
1972
1973 if(peer->supports != NULL)
1974 {
1975 for(i = 0; peer->supports[i] != NULL; i++)
1976 free(peer->supports[i]);
1977 free(peer->supports);
1978 }
1979 arr = NULL;
1980 arrsize = arrdata = 0;
1981 p = args;
1982 do
1983 {
1984 if((p2 = strchr(p, ' ')) != NULL)
1985 *(p2++) = 0;
1986 if(*p == 0)
1987 continue;
1988 addtobuf(arr, sstrdup(p));
1989 } while((p = p2) != NULL);
1990 addtobuf(arr, NULL);
1991 peer->supports = arr;
1992}
1993
1994static void cmd_getblock(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
1995{
1996 int fd;
1997 char *p, *p2;
1998 off_t start, numbytes;
1999 char *charset, *buf;
2000 wchar_t *buf2;
2001 struct sharecache *node;
2002 struct stat sb;
2003 struct socket *lesk;
2004
2005 if(peer->transfer == NULL)
2006 {
2007 peer->close = 1;
2008 return;
2009 }
2010 p = args;
2011 if((p2 = strchr(p, ' ')) == NULL)
2012 {
2013 peer->close = 1;
2014 return;
2015 }
2016 *(p2++) = 0;
2017 start = strtoll(p, NULL, 10);
2018 p = p2;
2019 if((p2 = strchr(p, ' ')) == NULL)
2020 {
2021 peer->close = 1;
2022 return;
2023 }
2024 *(p2++) = 0;
2025 numbytes = strtoll(p, NULL, 10);
2026 p = p2;
2027 if(!strcmp(cmd, "$UGetBlock") || !strcmp(cmd, "$UGetZBlock"))
2028 charset = "UTF-8";
2029 else
2030 /* Use DCCHARSET in $Get paths until further researched... */
2031 charset = DCCHARSET;
2032 if(!strcmp(cmd, "$GetZBlock") || !strcmp(cmd, "$UGetZBlock"))
2033 initcompress(peer, CPRS_ZLIB);
2034 if(((fd = openfilelist(p)) < 0) && (errno != 0))
2035 {
2036 qstr(sk, "$Error Could not send file list|");
2037 return;
2038 } else if(fd >= 0) {
2039 if((buf2 = nmdc2path(args, charset)) != NULL) {
2040 transfersetpath(peer->transfer, buf2);
2041 free(buf2);
2042 }
2043 peer->transfer->flags.b.minislot = 1;
2044 }
2045 if(fd < 0)
2046 {
2047 if((node = resdcpath(p, charset, '\\')) == NULL)
2048 {
2049 qstr(sk, "$Error File not in cache|");
2050 return;
2051 }
2052 if((fd = opensharecache(node)) < 0)
2053 {
2054 qstrf(sk, "$Error %s|", strerror(errno));
2055 return;
2056 }
2057 buf = getfspath(node);
2058 if((buf2 = icsmbstowcs(buf, NULL, NULL)) == NULL)
2059 flog(LOG_WARNING, "could not convert native path into a wcs (%s): %s", buf, strerror(errno));
2060 else
2061 transfersetpath(peer->transfer, buf2);
2062 free(buf);
2063 }
2064 if(fstat(fd, &sb) < 0)
2065 {
2066 close(fd);
2067 flog(LOG_WARNING, "could not stat file %ls: %s", node->name, strerror(errno));
2068 qstr(sk, "$Error|");
2069 return;
2070 }
2071 if(sb.st_size < 65536)
2072 peer->transfer->flags.b.minislot = 1;
2073 if(!peer->transfer->flags.b.minislot && (slotsleft() < 1)) {
2074 close(fd);
2075 qstr(sk, "$MaxedOut|");
2076 return;
2077 }
2078 if((start != 0) && ((start >= sb.st_size) || (lseek(fd, start, SEEK_SET) < 0)))
2079 {
2080 close(fd);
2081 qstr(sk, "$Error Offset out of range|");
2082 return;
2083 }
2084 if((numbytes < 0) || (start + numbytes > sb.st_size))
2085 numbytes = sb.st_size - start;
2086 lesk = wrapsock(fd);
2087 transferprepul(peer->transfer, sb.st_size, start, start + numbytes, lesk);
2088 putsock(lesk);
2089 qstrf(sk, "$Sending %ji|", (intmax_t)numbytes);
2090 startul(peer);
2091}
2092
2093static void cmd_adcget(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
2094{
2095 int i;
2096 char **argv, *buf;
2097 off_t start, numbytes;
2098 struct sharecache *node;
2099 struct stat sb;
2100 struct socket *lesk;
2101 wchar_t *wbuf;
2102 int fd;
2103
2104 if(peer->transfer == NULL)
2105 {
2106 peer->close = 1;
2107 return;
2108 }
2109 if((argv = parseadc(args)) == NULL)
2110 {
2111 peer->close = 1;
2112 return;
2113 }
2114 if(parrlen(argv) < 4)
2115 {
2116 peer->close = 1;
2117 goto out;
2118 }
2119 start = strtoll(argv[2], NULL, 10);
2120 numbytes = strtoll(argv[3], NULL, 10);
2121 node = NULL;
2122 fd = -1;
2123 if(((fd = openfilelist(argv[1])) < 0) && (errno != 0))
2124 {
2125 qstr(sk, "$Error Could not send file list|");
2126 goto out;
2127 } else if(fd >= 0) {
2128 if((wbuf = adc2path(argv[1])) != NULL)
2129 transfersetpath(peer->transfer, wbuf);
2130 free(wbuf);
2131 peer->transfer->flags.b.minislot = 1;
2132 }
2133 if(fd < 0)
2134 {
2135 if(!strncmp(argv[1], "TTH/", 4))
2136 {
2137 if((node = findbytth(argv[1] + 4)) == NULL)
2138 {
2139 qstr(sk, "$Error File not in cache|");
2140 goto out;
2141 }
2142 } else {
2143 if((node = resdcpath((argv[1][0] == '/')?(argv[1] + 1):(argv[1]), "UTF-8", '/')) == NULL)
2144 {
2145 qstr(sk, "$Error File not in cache|");
2146 goto out;
2147 }
2148 }
2149 if((fd = opensharecache(node)) < 0)
2150 {
2151 qstrf(sk, "$Error %s|", strerror(errno));
2152 goto out;
2153 }
2154 buf = getfspath(node);
2155 if((wbuf = icsmbstowcs(buf, NULL, NULL)) == NULL)
2156 flog(LOG_WARNING, "could not convert native path into a wcs (%s): %s", buf, strerror(errno));
2157 else
2158 transfersetpath(peer->transfer, wbuf);
2159 free(buf);
2160 }
2161 if(!strcmp(argv[0], "file"))
2162 {
2163 for(i = 4; argv[i] != NULL; i++)
2164 {
2165 if(!strcmp(argv[i], "ZL1"))
2166 initcompress(peer, CPRS_ZLIB);
2167 }
2168 if(fstat(fd, &sb) < 0)
2169 {
2170 flog(LOG_WARNING, "could not stat file %ls: %s", node->name, strerror(errno));
2171 qstr(sk, "$Error|");
2172 goto out;
2173 }
2174 if(sb.st_size < 65536)
2175 peer->transfer->flags.b.minislot = 1;
2176 if(!peer->transfer->flags.b.minislot && (slotsleft() < 1)) {
2177 qstr(sk, "$MaxedOut|");
2178 goto out;
2179 }
2180 if((start != 0) && ((start >= sb.st_size) || (lseek(fd, start, SEEK_SET) < 0)))
2181 {
2182 qstr(sk, "$Error Offset out of range|");
2183 goto out;
2184 }
2185 if((numbytes < 0) || (start + numbytes > sb.st_size))
2186 numbytes = sb.st_size - start;
2187 lesk = wrapsock(fd);
2188 transferprepul(peer->transfer, sb.st_size, start, start + numbytes, lesk);
2189 putsock(lesk);
2190 fd = -1;
2191 qstr(sk, "$ADCSND");
2192 sendadc(sk, "file");
2193 sendadc(sk, argv[1]);
2194 sendadcf(sk, "%ji", (intmax_t)start);
2195 sendadcf(sk, "%ji", (intmax_t)numbytes);
2196 if(peer->compress == CPRS_ZLIB)
2197 sendadc(sk, "ZL1");
2198 qstr(sk, "|");
2199 startul(peer);
2200 } else if(!strcmp(argv[0], "tthl")) {
2201 /*
2202 * XXX: Implement full TTHL support.
2203 *
2204 * In the meantime, this is better than nothing, since it at
2205 * least allows fetching of the TTH root if it isn't already
2206 * known.
2207 */
2208 if(node == NULL)
2209 {
2210 qstr(sk, "$Error no TTHL data for virtual files|");
2211 goto out;
2212 }
2213 qstr(sk, "$ADCSND");
2214 sendadc(sk, "tthl");
2215 sendadc(sk, argv[1]);
2216 sendadc(sk, "0");
2217 sendadc(sk, "24");
2218 qstr(sk, "|");
2219 sockqueue(sk, node->hashtth, 24);
2220 } else {
2221 qstr(sk, "$Error Namespace not implemented|");
2222 goto out;
2223 }
2224
2225 out:
2226 if(fd >= 0)
2227 close(fd);
2228 freeparr(argv);
2229}
2230
2231static void handletthl(struct dcpeer *peer)
2232{
2233 char buf[24];
2234
2235 while(peer->inbufdata >= 24)
2236 {
2237 pushtigertree(&peer->tth, peer->inbuf);
2238 memmove(peer->inbuf, peer->inbuf + 24, peer->inbufdata -= 24);
2239 peer->curread += 24;
2240 }
2241 if(peer->curread >= peer->totalsize)
2242 {
2243 if(peer->timeout == NULL)
2244 peer->timeout = timercallback(ntime() + 180, (void (*)(int, void *))peertimeout, peer);
2245 peer->state = PEER_CMD;
2246 synctigertree(&peer->tth);
2247 restigertree(&peer->tth, buf);
2248 transfersethash(peer->transfer, newhash(L"TTH", 24, buf));
2249 requestfile(peer);
2250 }
2251}
2252
2253static void cmd_adcsnd(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
2254{
2255 char **argv;
2256 off_t start, numbytes;
2257
2258 if(peer->transfer == NULL)
2259 {
2260 peer->close = 1;
2261 return;
2262 }
2263 if((argv = parseadc(args)) == NULL)
2264 {
2265 peer->close = 1;
2266 return;
2267 }
2268 if(parrlen(argv) < 4)
2269 {
2270 peer->close = 1;
2271 goto out;
2272 }
2273 start = strtoll(argv[2], NULL, 10);
2274 numbytes = strtoll(argv[3], NULL, 10);
2275 if(!strcmp(argv[0], "tthl"))
2276 {
2277 if((start != 0) || (numbytes % 24 != 0))
2278 {
2279 /* Weird. Bail out. */
2280 peer->close = 1;
2281 goto out;
2282 }
2283 if(peer->timeout != NULL)
2284 canceltimer(peer->timeout);
2285 peer->state = PEER_TTHL;
2286 peer->totalsize = numbytes;
2287 peer->curread = 0;
2288 peer->fetchingtthl = 0;
2289 inittigertree(&peer->tth);
2290 handletthl(peer);
2291 } else if(!strcmp(argv[0], "file")) {
2292 if(start != peer->transfer->curpos)
2293 {
2294 peer->close = 1;
2295 goto out;
2296 }
2297 if(start + numbytes != peer->transfer->size)
2298 {
2299 transfersetsize(peer->transfer, start + numbytes);
2300 peer->close = 1;
2301 goto out;
2302 }
2303 startdl(peer);
2304 if(peer->inbufdata > 0)
2305 {
2306 sockpushdata(sk, peer->inbuf, peer->inbufdata);
2307 peer->inbufdata = 0;
2308 }
2309 } else {
2310 /* We certainly didn't request this...*/
2311 peer->close = 1;
2312 goto out;
2313 }
2314
2315 out:
2316 freeparr(argv);
2317}
2318
2319static void cmd_sending(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
2320{
2321 off_t numbytes;
2322
2323 if(peer->transfer == NULL)
2324 {
2325 peer->close = 1;
2326 return;
2327 }
2328 numbytes = strtoll(args, NULL, 10);
2329 if(peer->transfer->size - peer->transfer->curpos != numbytes)
2330 {
2331 transfersetsize(peer->transfer, peer->transfer->curpos + numbytes);
2332 peer->close = 1;
2333 return;
2334 }
2335 startdl(peer);
2336 if(peer->inbufdata > 0)
2337 {
2338 sockpushdata(sk, peer->inbuf, peer->inbufdata);
2339 peer->inbufdata = 0;
2340 }
2341}
2342
2343/*
2344Hub skeleton:
2345static void cmd_(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
2346{
2347 struct dchub *hub;
2348
2349 hub = fn->data;
2350 hubhandleaction(sk, fn, cmd, args);
2351}
2352
2353Peer skeleton:
2354static void cmd_(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
2355{
2356}
2357
2358*/
2359
2360static int hubreqconn(struct fnetpeer *peer)
2361{
2362 struct dchub *hub;
2363 char *mbsnick;
2364
2365 if((peer->fn->state != FNN_EST) || (peer->fn->fnet != &dcnet))
2366 {
2367 errno = EINVAL;
2368 return(1);
2369 }
2370 if((hub = peer->fn->data) == NULL)
2371 {
2372 errno = EFAULT;
2373 return(1);
2374 }
2375 if((mbsnick = icwcstombs(peer->id, hub->charset)) == NULL)
2376 return(1); /* Shouldn't happen, of course, but who knows... */
2377 if(tcpsock != NULL)
2378 {
2379 sendctm(hub->sk, mbsnick);
2380 expectpeer(mbsnick, peer->fn);
2381 } else {
2382 qstrf(hub->sk, "$RevConnectToMe %s %s|", hub->nativenick, mbsnick);
2383 }
2384 free(mbsnick);
2385 return(0);
2386}
2387
2388static int hubsendchat(struct fnetnode *fn, int public, wchar_t *to, wchar_t *string)
2389{
2390 struct dchub *hub;
2391 char *mbsstring, *mbsto;
2392
2393 hub = fn->data;
2394 if((mbsto = icwcstombs(to, hub->charset)) == NULL)
2395 {
2396 errno = EILSEQ;
2397 return(1);
2398 }
2399 if((mbsstring = icwcstombs(string, hub->charset)) == NULL)
2400 {
2401 errno = EILSEQ;
2402 return(1);
2403 }
2404 if((strchr(mbsto, '|') != NULL) || (strchr(mbsto, ' ') != NULL))
2405 {
2406 free(mbsto);
2407 free(mbsstring);
2408 errno = ESRCH;
2409 return(1);
2410 }
2411 if(strchr(mbsstring, '|') != NULL)
2412 {
2413 free(mbsto);
2414 free(mbsstring);
2415 errno = EILSEQ;
2416 return(1);
2417 }
2418 if(public)
2419 {
2420 if(*to == L'\0')
2421 {
2422 qstrf(hub->sk, "<%s> %s|", hub->nativenick, mbsstring);
2423 } else {
2424 qstrf(hub->sk, "$To: %s From: %s $<%s> %s|", mbsto, hub->nativenick, hub->nativenick, mbsstring);
2425 }
2426 } else {
2427 qstrf(hub->sk, "$To: %s From: %s $<%s> %s|", mbsto, hub->nativenick, hub->nativenick, mbsstring);
2428 }
2429 free(mbsto);
2430 free(mbsstring);
2431 return(0);
2432}
2433
2434static void findsizelimit(struct sexpr *sexpr, off_t *min, off_t *max)
2435{
2436 off_t minl, maxl, minr, maxr, retmin, retmax;
2437
2438 switch(sexpr->op)
2439 {
2440 case SOP_AND:
2441 findsizelimit(sexpr->l, &minl, &maxl);
2442 findsizelimit(sexpr->r, &minr, &maxr);
2443 retmin = (minl > minr)?minl:minr;
2444 if((maxl != -1) && (maxr != -1))
2445 retmax = (maxl < maxr)?maxl:maxr;
2446 else if(maxl != -1)
2447 retmax = maxl;
2448 else if(maxr != -1)
2449 retmax = maxr;
2450 else
2451 retmax = -1;
2452 break;
2453 case SOP_OR:
2454 findsizelimit(sexpr->l, &minl, &maxl);
2455 findsizelimit(sexpr->r, &minr, &maxr);
2456 retmin = (minl < minr)?minl:minr;
2457 if((maxl == -1) || (maxr == -1))
2458 retmax = -1;
2459 else
2460 retmax = (maxl > maxr)?maxl:maxr;
2461 break;
2462 case SOP_NOT:
2463 findsizelimit(sexpr->l, &minl, &maxl);
2464 if((minl == 0) && (maxl == -1)) /* Interval is unspecified */
2465 {
2466 retmin = 0;
2467 retmax = -1;
2468 } else if((minl == 0) && (maxl != -1)) {
2469 retmin = maxl + 1;
2470 retmax = -1;
2471 } else if((minl != 0) && (maxl == -1)) {
2472 retmin = 0;
2473 retmax = minl - 1;
2474 } else { /* This would yield two seperate intervals, which DC cannot handle */
2475 retmin = 0;
2476 retmax = -1;
2477 }
2478 case SOP_SIZELT:
2479 retmin = 0;
2480 retmax = sexpr->d.sz - 1;
2481 break;
2482 case SOP_SIZEEQ:
2483 retmin = sexpr->d.sz;
2484 retmax = sexpr->d.sz;
2485 break;
2486 case SOP_SIZEGT:
2487 retmin = sexpr->d.sz + 1;
2488 retmax = -1;
2489 break;
2490 default:
2491 retmin = 0;
2492 retmax = -1;
2493 break;
2494 }
2495 if(min != NULL)
2496 *min = retmin;
2497 if(max != NULL)
2498 *max = retmax;
2499}
2500
2501static struct hash *findsehash(struct sexpr *sexpr)
2502{
2503 struct hash *h1, *h2;
2504
2505 switch(sexpr->op)
2506 {
2507 case SOP_AND:
2508 if((h1 = findsehash(sexpr->l)) != NULL)
2509 return(h1);
2510 if((h1 = findsehash(sexpr->r)) != NULL)
2511 return(h1);
2512 break;
2513 case SOP_OR:
2514 if((h1 = findsehash(sexpr->l)) == NULL)
2515 return(NULL);
2516 if((h2 = findsehash(sexpr->r)) == NULL)
2517 return(NULL);
2518 if(hashcmp(h1, h2))
2519 return(h1);
2520 break;
2521 case SOP_HASHIS:
2522 if(!wcscmp(sexpr->d.hash->algo, L"TTH"))
2523 return(sexpr->d.hash);
2524 default:
2525 break;
2526 }
2527 return(NULL);
2528}
2529
2530static int hubsearch(struct fnetnode *fn, struct search *srch, struct srchfnnlist *ln)
2531{
2532 struct dchub *hub;
2533 struct wcslist *list, *cur;
2534 char *sstr, *buf, *p;
2535 size_t sstrsize, sstrdata;
2536 struct sockaddr *name;
2537 socklen_t namelen;
2538 off_t minsize, maxsize;
2539 struct hash *hash;
2540
2541 hub = fn->data;
2542 if((fn->state != FNN_EST) || (hub->sk == NULL) || (hub->sk->state != SOCK_EST))
2543 return(1);
2544 list = findsexprstrs(srch->sexpr);
2545 findsizelimit(srch->sexpr, &minsize, &maxsize);
2546 hash = findsehash(srch->sexpr);
2547 if((minsize != 0) && (maxsize != -1))
2548 {
2549 /* Choose either minsize or maxsize by trying to determine
2550 * which choice will be most restrictive. The result can be
2551 * approximative at best anyway, so don't try too hard... */
2552 if((50000000 - maxsize) > (minsize - 50000000))
2553 minsize = 0;
2554 else
2555 maxsize = -1;
2556 }
2557 sstr = NULL;
2558 sstrsize = sstrdata = 0;
2559 if((hash != NULL) && (hash->len == 24))
2560 {
2561 /* Prioritize hash searches above all else */
2562 bufcat(sstr, "F?T?0?9?TTH:", 12);
2563 buf = base32encode(hash->buf, hash->len);
2564
2565 bufcat(sstr, buf, 39);
2566 free(buf);
2567 } else {
2568 if(minsize != 0)
2569 {
2570 sizebuf2(sstr, sstrdata + 32, 1);
2571 sstrdata += snprintf(sstr + sstrdata, sstrsize - sstrdata, "T?F?%ji?1?", (intmax_t)minsize);
2572 } else if(maxsize != -1) {
2573 sizebuf2(sstr, sstrdata + 32, 1);
2574 sstrdata += snprintf(sstr + sstrdata, sstrsize - sstrdata, "T?T?%ji?1?", (intmax_t)maxsize);
2575 } else {
2576 bufcat(sstr, "F?F?0?1?", 8);
2577 }
2578 if(list != NULL)
2579 {
2580 for(cur = list; cur != NULL; cur = cur->next)
2581 {
2582 /* Use DCCHARSET in $Get paths until further researched... */
2583 if((buf = icwcstombs(cur->str, DCCHARSET)) == NULL)
2584 {
2585 /* Can't find anything anyway if the search expression
2586 * requires characters outside DC's charset. There's
2587 * nothing technically wrong with the search itself,
2588 * however, so return success. This should be
2589 * considered as an optimization. */
2590 freesl(&list);
2591 if(sstr != NULL)
2592 free(sstr);
2593 return(0);
2594 }
2595 if(cur != list)
2596 addtobuf(sstr, '$');
2597 /*
2598 * It probably doesn't hurt if buf contains any extra
2599 * dollar signs - it will just result in extra search
2600 * terms, and the extraneous results will be filtered by
2601 * the search layer anyway. It hurts if it contains any
2602 * pipes, though, so let's sell them for money.
2603 */
2604 for(p = buf; *p; p++)
2605 {
2606 if(*p == '|')
2607 *p = '$';
2608 }
2609 bufcat(sstr, buf, strlen(buf));
2610 free(buf);
2611 }
2612 } else {
2613 /* Will match all files... :-/ */
2614 addtobuf(sstr, '.');
2615 }
2616 }
2617 addtobuf(sstr, 0);
2618 if(tcpsock != NULL)
2619 {
2620 if(sockgetremotename2(udpsock, hub->sk, &name, &namelen) < 0)
2621 {
2622 flog(LOG_WARNING, "cannot get address of UDP socket");
2623 } else {
2624 qstrf(hub->sk, "$Search %s %s|", formataddress(name, namelen), sstr);
2625 free(name);
2626 }
2627 } else {
2628 qstrf(hub->sk, "$Search Hub:%s %s|", hub->nativenick, sstr);
2629 }
2630 free(sstr);
2631 freesl(&list);
2632 fn->lastsrch = time(NULL);
2633 return(0);
2634}
2635
2636#undef skipcmd
2637#undef qstr
2638#undef qstrf
2639
2640#define cc(c) ((void (*)(struct socket *, void *, char *, char *))(c))
2641static struct command hubcmds[] =
2642{
2643 {"$Lock", cc(cmd_lock)},
2644 {"$HubName", cc(cmd_hubname)},
2645 {"$Hello", cc(cmd_hello)},
2646 {"$Quit", cc(cmd_quit)},
2647 {"$NickList", cc(cmd_nicklist)},
2648 {"$OpList", cc(cmd_oplist)},
2649 {"$MyINFO", cc(cmd_myinfo)},
2650 {"$ForceMove", cc(cmd_forcemove)},
2651 {"$Search", cc(cmd_search), .limit = 100},
2652 {"$MultiSearch", cc(cmd_search), .limit = 50},
2653 {"$ConnectToMe", cc(cmd_connecttome), .limit = 200},
2654 {"$RevConnectToMe", cc(cmd_revconnecttome), .limit = 500},
2655 {"$GetNetInfo", cc(cmd_getnetinfo)},
2656 {"$To:", cc(cmd_to)},
2657 {"$SR", cc(cmd_sr)},
2658 {"$UserCommand", cc(cmd_usercommand)},
2659 {"$GetPass", cc(cmd_getpass)},
2660 {"$LogedIn", cc(cmd_logedin)}, /* sic */
2661 {"$Supports", cc(cmd_hubsupports)},
2662 {NULL, NULL}
2663};
2664
2665static struct command peercmds[] =
2666{
2667 {"$MyNick", cc(cmd_mynick)},
2668 {"$Lock", cc(cmd_peerlock)},
2669 {"$Direction", cc(cmd_direction)},
2670 {"$Key", cc(cmd_key)},
2671 {"$FileLength", cc(cmd_filelength)},
2672 {"$Error", cc(cmd_error)},
2673 {"$MaxedOut", cc(cmd_maxedout)},
2674 {"$Get", cc(cmd_get)},
2675 {"$Send", cc(cmd_send)},
2676 {"$Supports", cc(cmd_supports)},
2677 {"$GetBlock", cc(cmd_getblock)},
2678 {"$UGetBlock", cc(cmd_getblock)},
2679 {"$GetZBlock", cc(cmd_getblock)},
2680 {"$UGetZBlock", cc(cmd_getblock)},
2681 {"$ADCGET", cc(cmd_adcget)},
2682 {"$ADCSND", cc(cmd_adcsnd), .stop = 1},
2683 {"$Sending", cc(cmd_sending), .stop = 1},
2684 {NULL, NULL}
2685};
2686#undef cc
2687
2688static void dctransgotdata(struct transfer *transfer, struct dcpeer *peer)
2689{
2690 int ret;
2691 void *buf;
2692 unsigned char outbuf[1024];
2693 z_stream *cstr;
2694 size_t bufsize;
2695
2696 if((peer->state == PEER_TRNS) || (peer->state == PEER_SYNC))
2697 {
2698 if(sockqueueleft(peer->sk) > 0)
2699 {
2700 if((buf = sockgetinbuf(peer->trpipe, &bufsize)) != NULL)
2701 {
2702 if(peer->compress == CPRS_NONE)
2703 {
2704 sockqueue(peer->sk, buf, bufsize);
2705 } else if(peer->compress == CPRS_ZLIB) {
2706 cstr = peer->cprsdata;
2707 cstr->next_in = buf;
2708 cstr->avail_in = bufsize;
2709 while(cstr->avail_in > 0)
2710 {
2711 cstr->next_out = outbuf;
2712 cstr->avail_out = sizeof(outbuf);
2713 if((ret = deflate(cstr, 0)) != Z_OK)
2714 {
2715 flog(LOG_WARNING, "bug? deflate() did not return Z_OK (but rather %i)", ret);
2716 freedcpeer(peer);
2717 return;
2718 }
2719 sockqueue(peer->sk, outbuf, sizeof(outbuf) - cstr->avail_out);
2720 }
2721 }
2722 free(buf);
2723 }
2724 if(peer->state == PEER_SYNC)
2725 {
2726 if(peer->compress == CPRS_ZLIB)
2727 {
2728 cstr = peer->cprsdata;
2729 cstr->next_in = NULL;
2730 cstr->avail_in = 0;
2731 do
2732 {
2733 cstr->next_out = outbuf;
2734 cstr->avail_out = sizeof(outbuf);
2735 ret = deflate(cstr, Z_FINISH);
2736 if((ret != Z_OK) && (ret != Z_STREAM_END))
2737 {
2738 flog(LOG_WARNING, "bug? deflate(Z_FINISH) did not return Z_OK (but rather %i)", ret);
2739 freedcpeer(peer);
2740 return;
2741 }
2742 sockqueue(peer->sk, outbuf, sizeof(outbuf) - cstr->avail_out);
2743 } while(ret != Z_STREAM_END);
2744 }
2745 if(peer->ptclose)
2746 {
2747 peer->close = 1;
2748 } else {
2749 if(peer->timeout == NULL)
2750 peer->timeout = timercallback(ntime() + 180, (void (*)(int, void *))peertimeout, peer);
2751 peer->state = PEER_CMD;
2752 endcompress(peer);
2753 transfersetstate(transfer, TRNS_HS);
2754 socksettos(peer->sk, confgetint("fnet", "fnptos"));
2755 transfer->flags.b.minislot = 0;
2756 peer->sk->writecb = NULL;
2757 }
2758 }
2759 }
2760 }
2761}
2762
2763static void peerdetach(struct dcpeer *peer)
2764{
2765 CBUNREG(peer->transfer, trans_filterout, peer);
2766 CBUNREG(peer->transfer, trans_destroy, peer);
2767 peer->trpipe->pnext = NULL;
2768 closesock(peer->trpipe);
2769 quitsock(peer->trpipe);
2770 peer->trpipe = NULL;
2771 peer->transfer = NULL;
2772}
2773
2774static int trdestroycb(struct transfer *transfer, struct dcpeer *peer)
2775{
2776 peerdetach(peer);
2777 peer->close = 1;
2778 return(0);
2779}
2780
2781static void transread(struct socket *sk, struct dcpeer *peer)
2782{
2783 void *buf;
2784 size_t bufsize;
2785
2786 if(peer->transfer == NULL) {
2787 freedcpeer(peer);
2788 return;
2789 }
2790 if(sockqueueleft(peer->trpipe) < 0)
2791 return;
2792 if((buf = sockgetinbuf(sk, &bufsize)) != NULL)
2793 {
2794 if(peer->transfer == NULL)
2795 {
2796 free(buf);
2797 freedcpeer(peer);
2798 return;
2799 }
2800 sockqueue(peer->trpipe, buf, bufsize);
2801 free(buf);
2802 }
2803 if(peer->transfer->curpos >= peer->transfer->size)
2804 {
2805 peerdetach(peer);
2806 peer->close = 1;
2807 return;
2808 }
2809}
2810
2811static void transerr(struct socket *sk, int err, struct dcpeer *peer)
2812{
2813 struct transfer *transfer;
2814
2815 if((transfer = peer->transfer) == NULL)
2816 {
2817 freedcpeer(peer);
2818 return;
2819 }
2820 peerdetach(peer);
2821 peer->close = 1;
2822}
2823
2824static void transwrite(struct socket *sk, struct dcpeer *peer)
2825{
2826 if((peer->state != PEER_TRNS) && (peer->state != PEER_SYNC))
2827 return;
2828 if(peer->transfer == NULL)
2829 {
2830 freedcpeer(peer);
2831 return;
2832 }
2833 dctransgotdata(peer->transfer, peer);
2834 sockread(peer->trpipe);
2835}
2836
2837static void trpiperead(struct socket *sk, struct dcpeer *peer)
2838{
2839 dctransgotdata(peer->transfer, peer);
2840}
2841
2842static void trpipewrite(struct socket *sk, struct dcpeer *peer)
2843{
2844 transread(peer->sk, peer);
2845}
2846
2847static void trpipeerr(struct socket *sk, int errno, struct dcpeer *peer)
2848{
2849 peer->state = PEER_SYNC;
2850 dctransgotdata(peer->transfer, peer);
2851 peerdetach(peer);
2852 if(peer->state != PEER_CMD)
2853 peer->close = 1;
2854}
2855
2856static struct socket *mktrpipe(struct dcpeer *peer)
2857{
2858 struct socket *sk;
2859
2860 sk = netsockpipe();
2861 sk->pnext = peer->sk;
2862 sk->data = peer;
2863 sk->readcb = (void (*)(struct socket *, void *))trpiperead;
2864 sk->writecb = (void (*)(struct socket *, void *))trpipewrite;
2865 sk->errcb = (void (*)(struct socket *, int, void *))trpipeerr;
2866 return(sk);
2867}
2868
2869static void udpread(struct socket *sk, void *data)
2870{
2871 char *buf, *p, *p2, *hashbuf;
2872 size_t buflen, hashlen;
2873 char *nick, *filename, *hubname;
2874 struct sockaddr_in hubaddr;
2875 struct sockaddr *addrbuf;
2876 off_t size;
2877 int slots;
2878 struct fnetnode *fn, *myfn;
2879 struct dchub *hub;
2880 struct srchres *sr;
2881 wchar_t *wnick, *wfile;
2882 struct hash *hash;
2883
2884 if((buf = sockgetinbuf(sk, &buflen)) == NULL)
2885 return;
2886 buf = srealloc(buf, buflen + 1);
2887 buf[buflen] = 0;
2888 if(!strncmp(buf, "$SR ", 4))
2889 {
2890 p = buf + 4;
2891 nick = p;
2892 if((p2 = strchr(p, ' ')) == NULL)
2893 {
2894 free(buf);
2895 return;
2896 }
2897 *p2 = 0;
2898 p = p2 + 1;
2899 filename = p;
2900 if((p2 = strchr(p, 5)) == NULL)
2901 {
2902 free(buf);
2903 return;
2904 }
2905 *p2 = 0;
2906 p = p2 + 1;
2907 if((p2 = strchr(p, ' ')) == NULL)
2908 {
2909 free(buf);
2910 return;
2911 }
2912 *p2 = 0;
2913 size = strtoll(p, NULL, 10);
2914 p = p2 + 1;
2915 if((p2 = strchr(p, '/')) == NULL)
2916 {
2917 free(buf);
2918 return;
2919 }
2920 *p2 = 0;
2921 slots = atoi(p);
2922 p = p2 + 1;
2923 if((p2 = strchr(p, 5)) == NULL)
2924 {
2925 free(buf);
2926 return;
2927 }
2928 p = p2 + 1;
2929 hubname = p;
2930 if((p2 = strstr(p, " (")) == NULL)
2931 {
2932 free(buf);
2933 return;
2934 }
2935 *p2 = 0;
2936 p = p2 + 2;
2937 if((p2 = strchr(p, ':')) == NULL)
2938 {
2939 free(buf);
2940 return;
2941 }
2942 *(p2++) = 0;
2943 hubaddr.sin_family = AF_INET;
2944 if(!inet_aton(p, &hubaddr.sin_addr))
2945 {
2946 free(buf);
2947 return;
2948 }
2949 p = p2;
2950 if((p2 = strchr(p, ')')) == NULL)
2951 {
2952 free(buf);
2953 return;
2954 }
2955 *p2 = 0;
2956 hubaddr.sin_port = htons(atoi(p));
2957 /* Use DCCHARSET in $Get paths until further researched... */
2958 if((wfile = nmdc2path(filename, DCCHARSET)) == NULL)
2959 {
2960 free(buf);
2961 return;
2962 }
2963 myfn = NULL;
2964 hash = NULL;
2965 if(!strncmp(hubname, "TTH:", 4))
2966 {
2967 if((hashbuf = base32decode(hubname + 4, &hashlen)) != NULL)
2968 {
2969 if(hashlen == 24)
2970 hash = newhash(L"TTH", 24, hashbuf);
2971 free(hashbuf);
2972 }
2973 } else {
2974 for(fn = fnetnodes; fn != NULL; fn = fn->next)
2975 {
2976 if((fn->fnet == &dcnet) && ((hub = fn->data) != NULL))
2977 {
2978 if((hub->nativename != NULL) && !strcmp(hub->nativename, hubname))
2979 {
2980 if(myfn == NULL)
2981 {
2982 myfn = fn;
2983 } else {
2984 myfn = NULL;
2985 break;
2986 }
2987 }
2988 }
2989 }
2990 }
2991 if(myfn == NULL)
2992 {
2993 for(fn = fnetnodes; fn != NULL; fn = fn->next)
2994 {
2995 if((fn->fnet == &dcnet) && ((hub = fn->data) != NULL) && !sockpeeraddr(hub->sk, &addrbuf, NULL))
2996 {
2997 if((hub->sk != NULL) && addreq(addrbuf, (struct sockaddr *)&hubaddr))
2998 {
2999 myfn = fn;
3000 free(addrbuf);
3001 break;
3002 }
3003 free(addrbuf);
3004 }
3005 }
3006 }
3007 hub = NULL;
3008 if(myfn != NULL)
3009 hub = myfn->data;
3010 if((wnick = icmbstowcs(nick, (hub == NULL)?DCCHARSET:(hub->charset))) == NULL)
3011 {
3012 free(buf);
3013 return;
3014 }
3015 sr = newsrchres(&dcnet, wfile, wnick);
3016 if(sr->peernick != NULL)
3017 free(sr->peernick);
3018 sr->peernick = swcsdup(wnick);
3019 sr->size = size;
3020 sr->slots = slots;
3021 free(wfile);
3022 free(wnick);
3023 if(myfn != NULL)
3024 getfnetnode(sr->fn = myfn);
3025 if(hash != NULL)
3026 sr->hash = hash;
3027 submitsrchres(sr);
3028 freesrchres(sr);
3029 }
3030 free(buf);
3031}
3032
3033static void hubread(struct socket *sk, struct fnetnode *fn)
3034{
3035 struct dchub *hub;
3036 struct command *cmd;
3037 char *newbuf;
3038 size_t datalen, cnlen;
3039 char *p, *p2;
3040
3041 hub = (struct dchub *)fn->data;
3042 if(hub->queue.size > 1000)
3043 return;
3044 if((newbuf = sockgetinbuf(sk, &datalen)) == NULL)
3045 return;
3046 if(hub->inbufdata > 500000) /* Discard possible malicious data */
3047 hub->inbufdata = 0;
3048 sizebuf2(hub->inbuf, hub->inbufdata + datalen, 1);
3049 memcpy(hub->inbuf + hub->inbufdata, newbuf, datalen);
3050 free(newbuf);
3051 p = hub->inbuf;
3052 hub->inbufdata += datalen;
3053 while((p - hub->inbuf < hub->inbufdata) && ((p2 = memchr(p, '|', hub->inbufdata - (p - hub->inbuf))) != NULL))
3054 {
3055 *(p2++) = 0;
3056 for(cmd = hubcmds; cmd->handler != NULL; cmd++)
3057 {
3058 cnlen = strlen(cmd->name);
3059 if(!strncmp(p, cmd->name, cnlen) && ((p[cnlen] == ' ') || (p[cnlen] == 0)))
3060 break;
3061 }
3062 if((cmd->limit == 0) || (hub->queue.size < cmd->limit))
3063 newqcmd(&hub->queue, p);
3064 p = p2;
3065 }
3066 memmove(hub->inbuf, p, hub->inbufdata -= p - hub->inbuf);
3067}
3068
3069static void huberr(struct socket *sk, int err, struct fnetnode *fn)
3070{
3071 killfnetnode(fn);
3072}
3073
3074static int hubsetnick(struct fnetnode *fn, wchar_t *newnick)
3075{
3076 struct dchub *hub;
3077 char *buf;
3078
3079 hub = fn->data;
3080 if((buf = icwcstombs(newnick, (hub == NULL)?DCCHARSET:(hub->charset))) == NULL)
3081 return(1);
3082 if((strchr(buf, ' ') != NULL) || (strchr(buf, '|') != NULL) || (strchr(buf, '$') != NULL))
3083 {
3084 free(buf);
3085 return(1);
3086 }
3087 if(hub == NULL) /* Not yet connected */
3088 {
3089 free(buf);
3090 return(0);
3091 }
3092 if(hub->nativenick != NULL)
3093 free(hub->nativenick);
3094 hub->nativenick = buf;
3095 return(0);
3096}
3097
3098static struct dchub *newdchub(struct fnetnode *fn)
3099{
3100 struct dchub *new;
3101 wchar_t *emu;
3102 wchar_t *wcharset;
3103 char *charset;
3104
3105 new = smalloc(sizeof(*new));
3106 memset(new, 0, sizeof(*new));
3107 fn->data = new;
3108 if(confgetint("dc", "dcppemu"))
3109 new->dcppemu = 1;
3110 if((emu = wpfind(fn->args, L"dcppemu")) != NULL)
3111 {
3112 if(*emu == L'y')
3113 new->dcppemu = 1;
3114 if(*emu == L'n')
3115 new->dcppemu = 0;
3116 }
3117 charset = NULL;
3118 if((wcharset = wpfind(fn->args, L"charset")) != NULL)
3119 {
3120 if((charset = icwcstombs(wcharset, "US-ASCII")) != NULL)
3121 {
3122 if(!havecharset(charset))
3123 {
3124 free(charset);
3125 charset = NULL;
3126 }
3127 }
3128 }
3129 if(charset != NULL)
3130 new->charset = charset;
3131 else
3132 new->charset = sstrdup(DCCHARSET);
3133 if(hubsetnick(fn, fn->mynick))
3134 fnetsetnick(fn, L"DoldaConnectUser-IN");
3135 /* IN as in Invalid Nick */
3136 return(new);
3137}
3138
3139static struct dcpeer *newdcpeer(struct socket *sk)
3140{
3141 struct dcpeer *new;
3142
3143 new = smalloc(sizeof(*new));
3144 memset(new, 0, sizeof(*new));
3145 getsock(sk);
3146 new->sk = sk;
3147 if(confgetint("dc", "dcppemu"))
3148 new->dcppemu = 1;
3149 new->next = peers;
3150 new->prev = NULL;
3151 if(peers != NULL)
3152 peers->prev = new;
3153 peers = new;
3154 numdcpeers++;
3155 return(new);
3156}
3157
3158static void freedcpeer(struct dcpeer *peer)
3159{
3160 int i;
3161 struct qcommand *qcmd;
3162
3163 if(peers == peer)
3164 peers = peer->next;
3165 if(peer->next != NULL)
3166 peer->next->prev = peer->prev;
3167 if(peer->prev != NULL)
3168 peer->prev->next = peer->next;
3169 if(peer->transfer != NULL)
3170 peerdetach(peer);
3171 if(peer->timeout != NULL)
3172 canceltimer(peer->timeout);
3173 if(peer->sk->data == peer)
3174 peer->sk->data = NULL;
3175 peer->sk->readcb = NULL;
3176 peer->sk->writecb = NULL;
3177 peer->sk->errcb = NULL;
3178 putsock(peer->sk);
3179 endcompress(peer);
3180 if(peer->supports != NULL)
3181 {
3182 for(i = 0; peer->supports[i] != NULL; i++)
3183 free(peer->supports[i]);
3184 free(peer->supports);
3185 }
3186 if(peer->inbuf != NULL)
3187 free(peer->inbuf);
3188 if(peer->key != NULL)
3189 free(peer->key);
3190 if(peer->wcsname != NULL)
3191 free(peer->wcsname);
3192 if(peer->nativename != NULL)
3193 free(peer->nativename);
3194 if(peer->charset != NULL)
3195 free(peer->charset);
3196 if(peer->fn != NULL)
3197 putfnetnode(peer->fn);
3198 while((qcmd = ulqcmd(&peer->queue)) != NULL)
3199 freeqcmd(qcmd);
3200 free(peer);
3201 numdcpeers--;
3202}
3203
3204static void hubconnect(struct fnetnode *fn, struct socket *sk)
3205{
3206 struct dchub *hub;
3207
3208 sk->readcb = (void (*)(struct socket *, void *))hubread;
3209 sk->errcb = (void (*)(struct socket *, int, void *))huberr;
3210 fn->data = hub = newdchub(fn);
3211 sk->data = fn;
3212 getsock(hub->sk = sk);
3213 return;
3214}
3215
3216static void hubdestroy(struct fnetnode *fn)
3217{
3218 int i;
3219 struct dchub *hub;
3220 struct qcommand *qcmd;
3221
3222 hub = (struct dchub *)fn->data;
3223 quitsock(hub->sk);
3224 while((qcmd = ulqcmd(&hub->queue)) != NULL)
3225 freeqcmd(qcmd);
3226 if(hub->supports != NULL)
3227 {
3228 for(i = 0; hub->supports[i] != NULL; i++)
3229 free(hub->supports[i]);
3230 free(hub->supports);
3231 }
3232 if(hub->nativename != NULL)
3233 free(hub->nativename);
3234 if(hub->nativenick != NULL)
3235 free(hub->nativenick);
3236 if(hub->charset != NULL)
3237 free(hub->charset);
3238 if(hub->inbuf != NULL)
3239 free(hub->inbuf);
3240 free(hub);
3241}
3242
3243static void hubkill(struct fnetnode *fn)
3244{
3245 struct dchub *hub;
3246
3247 hub = (struct dchub *)fn->data;
3248 closesock(hub->sk);
3249}
3250
3251static struct fnet dcnet =
3252{
3253 .name = L"dc",
3254 .connect = hubconnect,
3255 .destroy = hubdestroy,
3256 .kill = hubkill,
3257 .setnick = hubsetnick,
3258 .reqconn = hubreqconn,
3259 .sendchat = hubsendchat,
3260 .search = hubsearch,
3261};
3262
3263static void peerread(struct socket *sk, struct dcpeer *peer)
3264{
3265 char *newbuf, *p;
3266 size_t datalen, cnlen;
3267 struct command *cmd;
3268
3269 if(peer->state == PEER_CMD) {
3270 if((peer->queue.size > 50) || (peer->inbufdata > 65536))
3271 return;
3272 } else if(peer->state == PEER_TTHL) {
3273 } else {
3274 return;
3275 }
3276 if((newbuf = sockgetinbuf(sk, &datalen)) == NULL)
3277 return;
3278 sizebuf2(peer->inbuf, peer->inbufdata + datalen, 1);
3279 memcpy(peer->inbuf + peer->inbufdata, newbuf, datalen);
3280 free(newbuf);
3281 peer->inbufdata += datalen;
3282 if(peer->state == PEER_CMD)
3283 {
3284 p = peer->inbuf;
3285 while((peer->inbufdata > 0) && (p = memchr(peer->inbuf, '|', peer->inbufdata)) != NULL)
3286 {
3287 *(p++) = 0;
3288 for(cmd = peercmds; cmd->handler != NULL; cmd++)
3289 {
3290 cnlen = strlen(cmd->name);
3291 if(!strncmp(peer->inbuf, cmd->name, cnlen) && ((peer->inbuf[cnlen] == ' ') || (peer->inbuf[cnlen] == 0)))
3292 break;
3293 }
3294 if((cmd->limit == 0) || (peer->queue.size < cmd->limit))
3295 newqcmd(&peer->queue, peer->inbuf);
3296 memmove(peer->inbuf, p, peer->inbufdata -= p - peer->inbuf);
3297 if(cmd->stop)
3298 {
3299 peer->state = PEER_STOP;
3300 break;
3301 }
3302 }
3303 } else if(peer->state == PEER_TTHL) {
3304 handletthl(peer);
3305 }
3306}
3307
3308static void peererror(struct socket *sk, int err, struct dcpeer *peer)
3309{
3310 freedcpeer(peer);
3311}
3312
3313static void peerconnect(struct socket *sk, int err, struct fnetnode *fn)
3314{
3315 struct dcpeer *peer;
3316 struct dchub *hub;
3317
3318 if(err != 0)
3319 {
3320 putfnetnode(fn);
3321 return;
3322 }
3323 hub = fn->data;
3324 peer = newdcpeer(sk);
3325 peer->fn = fn;
3326 peer->accepted = 0;
3327 peer->dcppemu = hub->dcppemu;
3328 sk->readcb = (void (*)(struct socket *, void *))peerread;
3329 sk->errcb = (void (*)(struct socket *, int, void *))peererror;
3330 sk->data = peer;
3331 socksettos(sk, confgetint("fnet", "fnptos"));
3332 peer->timeout = timercallback(ntime() + 180, (void (*)(int, void *))peertimeout, peer);
3333 sendmynick(peer);
3334 sendpeerlock(peer);
3335}
3336
3337static void peeraccept(struct lport *lp, struct socket *newsk, void *data)
3338{
3339 struct dcpeer *peer;
3340
3341 peer = newdcpeer(newsk);
3342 peer->accepted = 1;
3343 newsk->readcb = (void (*)(struct socket *, void *))peerread;
3344 newsk->errcb = (void (*)(struct socket *, int, void *))peererror;
3345 newsk->data = peer;
3346 socksettos(newsk, confgetint("fnet", "fnptos"));
3347 peer->timeout = timercallback(ntime() + 180, (void (*)(int, void *))peertimeout, peer);
3348}
3349
3350static void updatehmlist(void)
3351{
3352 int i, lev, ic, ret;
3353 struct sharecache *node;
3354 char *buf, *buf2, numbuf[32];
3355 size_t bufsize, bufdata;
3356 int fd, ibuf;
3357 FILE *out;
3358
3359 bufdata = 0;
3360 buf = smalloc(bufsize = 65536);
3361 node = shareroot->child;
3362 lev = 0;
3363 while(1)
3364 {
3365 ic = 0;
3366 /* Use DCCHARSET in $Get paths until further researched... */
3367 if((buf2 = icwcstombs(node->name, DCCHARSET)) != NULL)
3368 {
3369 for(i = 0; i < lev; i++)
3370 addtobuf(buf, 9);
3371 bufcat(buf, buf2, strlen(buf2));
3372 free(buf2);
3373 if(node->f.b.type == FILE_REG)
3374 {
3375 addtobuf(buf, '|');
3376 sprintf(numbuf, "%ji", (intmax_t)node->size);
3377 bufcat(buf, numbuf, strlen(numbuf));
3378 }
3379 addtobuf(buf, 13);
3380 addtobuf(buf, 10);
3381 } else {
3382 ic = 1;
3383 }
3384 if((node->child != NULL) && !ic)
3385 {
3386 lev++;
3387 node = node->child;
3388 } else if(node->next != NULL) {
3389 node = node->next;
3390 } else {
3391 while(node->next == NULL)
3392 {
3393 lev--;
3394 node = node->parent;
3395 if(node == shareroot)
3396 break;
3397 }
3398 if(node == shareroot)
3399 break;
3400 node = node->next;
3401 }
3402 }
3403 if(hmlistname != NULL)
3404 {
3405 unlink(hmlistname);
3406 free(hmlistname);
3407 }
3408 hmlistname = sstrdup("/tmp/dc-filelist-hm-XXXXXX");
3409 if((fd = mkstemp(hmlistname)) < 0)
3410 {
3411 flog(LOG_WARNING, "could not create HM file list tempfile: %s", strerror(errno));
3412 free(hmlistname);
3413 hmlistname = NULL;
3414 } else {
3415 out = fdopen(fd, "w");
3416 /*
3417 * I do not want to implement a good Huffman encoder, and it's not
3418 * like Huffman encoding actually yields any impressive results
3419 * for DC file lists anyway, so I'll just output a bogus
3420 * tree. Implement a good encoder if you want to.
3421 */
3422 fwrite("HE3\r\0", 1, 5, out);
3423 fwrite(&bufdata, 4, 1, out); /* XXX: Endian unsafe */
3424 ibuf = 256;
3425 fwrite(&ibuf, 2, 1, out);
3426 ibuf = 8;
3427 for(i = 0; i < 256; i++)
3428 {
3429 fwrite(&i, 1, 1, out);
3430 fwrite(&ibuf, 1, 1, out);
3431 }
3432 for(i = 0; i < 256; i++)
3433 fwrite(&i, 1, 1, out);
3434 for(buf2 = buf; bufdata > 0;)
3435 {
3436 if((ret = fwrite(buf2, 1, bufdata, out)) < 0)
3437 {
3438 flog(LOG_WARNING, "could not write file list: %s", strerror(errno));
3439 break;
3440 }
3441 bufdata -= ret;
3442 buf2 += ret;
3443 }
3444 fclose(out);
3445 }
3446 free(buf);
3447}
3448
3449static struct xmlent
3450{
3451 wchar_t c;
3452 wchar_t *ent;
3453} entities[] = {
3454 {L'&', L"&amp;"},
3455 {L'\"', L"&#34;"},
3456/* {L'\'', L"&quot;"}, Emulate DC++ escaping by omitting this. */
3457 {L'\0', NULL}
3458};
3459
3460static wchar_t *escapexml(wchar_t *src)
3461{
3462 static wchar_t *buf = NULL;;
3463 int ret, c;
3464 wchar_t nbuf[32];
3465 size_t bufsize, bufdata;
3466 struct xmlent *ent;
3467
3468 if(buf != NULL)
3469 free(buf);
3470 buf = NULL;
3471 bufsize = bufdata = 0;
3472 for(; *src != L'\0'; src++)
3473 {
3474 c = wctob(*src);
3475 if((c > 0) && (c < 32))
3476 {
3477 bufcat(buf, L"&#", 2);
3478 ret = swprintf(nbuf, (sizeof(nbuf) / sizeof(*nbuf)), L"%i", c);
3479 bufcat(buf, nbuf, ret);
3480 addtobuf(buf, L';');
3481 } else {
3482 for(ent = entities; ent->ent != NULL; ent++)
3483 {
3484 if(ent->c == *src)
3485 {
3486 bufcat(buf, ent->ent, wcslen(ent->ent));
3487 break;
3488 }
3489 }
3490 if(ent->ent == NULL)
3491 addtobuf(buf, *src);
3492 }
3493 }
3494 addtobuf(buf, L'\0');
3495 return(buf);
3496}
3497
3498static void updatexmllist(void)
3499{
3500 int i, fd, lev;
3501 FILE *fs;
3502 char cidbuf[14], *namebuf;
3503 char *hashbuf;
3504 struct sharecache *node;
3505
3506 if(xmllistname != NULL)
3507 {
3508 unlink(xmllistname);
3509 free(xmllistname);
3510 }
3511 xmllistname = sstrdup("/tmp/dc-filelist-dcxml-XXXXXX");
3512 if((fd = mkstemp(xmllistname)) < 0)
3513 {
3514 flog(LOG_WARNING, "could not create XML file list tempfile: %s", strerror(errno));
3515 free(xmllistname);
3516 xmllistname = NULL;
3517 return;
3518 }
3519 if((fs = fdopen(fd, "w")) == NULL)
3520 {
3521 flog(LOG_WARNING, "could not fdopen XML list fd %i: %s", fd, strerror(errno));
3522 unlink(xmllistname);
3523 free(xmllistname);
3524 xmllistname = NULL;
3525 close(fd);
3526 return;
3527 }
3528 fprintf(fs, "<?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"yes\"?>\r\n");
3529 for(i = 0; i < sizeof(cidbuf) - 1; i++)
3530 cidbuf[i] = (rand() % ('Z' - 'A' + 1)) + 'A';
3531 cidbuf[i] = 0;
3532 if(confgetint("dc", "dcppemu"))
3533 fprintf(fs, "<FileListing Version=\"1\" CID=\"%s\" Base=\"/\" Generator=\"DC++ 0.674\">\r\n", cidbuf);
3534 else
3535 fprintf(fs, "<FileListing Version=\"1\" CID=\"%s\" Base=\"/\" Generator=\"%s\">\r\n", cidbuf, "DoldaConnect" VERSION);
3536
3537 node = shareroot->child;
3538 lev = 0;
3539 while(1)
3540 {
3541 if((namebuf = icswcstombs(escapexml(node->name), "UTF-8", NULL)) != NULL)
3542 {
3543 for(i = 0; i < lev; i++)
3544 fputc('\t', fs);
3545 if(node->child != NULL)
3546 {
3547 fprintf(fs, "<Directory Name=\"%s\">\r\n", namebuf);
3548 node = node->child;
3549 lev++;
3550 continue;
3551 } else {
3552 fprintf(fs, "<File Name=\"%s\" Size=\"%ji\"", namebuf, (intmax_t)node->size);
3553 if(node->f.b.hastth)
3554 {
3555 hashbuf = base32encode(node->hashtth, 24);
3556 fprintf(fs, " TTH=\"%.39s\"", hashbuf);
3557 free(hashbuf);
3558 }
3559 fprintf(fs, "/>\r\n");
3560 }
3561 while(node->next == NULL)
3562 {
3563 node = node->parent;
3564 if(node == shareroot)
3565 {
3566 break;
3567 } else {
3568 lev--;
3569 for(i = 0; i < lev; i++)
3570 fputc('\t', fs);
3571 fprintf(fs, "</Directory>\r\n");
3572 }
3573 }
3574 if(node == shareroot)
3575 break;
3576 node = node->next;
3577 }
3578 }
3579
3580 if(confgetint("dc", "dcppemu"))
3581 fprintf(fs, "</FileListing>");
3582 else
3583 fprintf(fs, "</FileListing>\r\n");
3584 fclose(fs);
3585}
3586
3587static void updatexmlbz2list(void)
3588{
3589 int err, fd;
3590 FILE *in;
3591 FILE *real;
3592 BZFILE *out;
3593 char buf[1024];
3594 size_t bufdata;
3595
3596 if(xmllistname == NULL)
3597 return;
3598 if((in = fopen(xmllistname, "r")) == NULL)
3599 {
3600 flog(LOG_WARNING, "could not open XML file list for bzipping: %s", strerror(errno));
3601 return;
3602 }
3603 if(xmlbz2listname != NULL)
3604 {
3605 unlink(xmlbz2listname);
3606 free(xmlbz2listname);
3607 }
3608 xmlbz2listname = sstrdup("/tmp/dc-filelist-dcxmlbz2-XXXXXX");
3609 if((fd = mkstemp(xmlbz2listname)) < 0)
3610 {
3611 flog(LOG_WARNING, "could not create bzipped XML file list tempfile: %s", strerror(errno));
3612 free(xmlbz2listname);
3613 xmlbz2listname = NULL;
3614 fclose(in);
3615 return;
3616 }
3617 if((real = fdopen(fd, "w")) == NULL)
3618 {
3619 flog(LOG_WARNING, "could not fdopen bzipped XML list fd %i: %s", fd, strerror(errno));
3620 close(fd);
3621 unlink(xmlbz2listname);
3622 free(xmlbz2listname);
3623 xmlbz2listname = NULL;
3624 fclose(in);
3625 return;
3626 }
3627 out = BZ2_bzWriteOpen(&err, real, 9, 0, 0);
3628 if(err != BZ_OK)
3629 {
3630 flog(LOG_WARNING, "could not open bzip2 stream from XML list");
3631 fclose(real);
3632 unlink(xmlbz2listname);
3633 free(xmlbz2listname);
3634 xmlbz2listname = NULL;
3635 fclose(in);
3636 return;
3637 }
3638 while(!feof(in))
3639 {
3640 bufdata = fread(buf, 1, sizeof(buf), in);
3641 BZ2_bzWrite(&err, out, buf, bufdata);
3642 }
3643 fclose(in);
3644 BZ2_bzWriteClose(&err, out, 0, NULL, NULL);
3645 fclose(real);
3646}
3647
3648static void listtimercb(int cancelled, void *uudata)
3649{
3650 listwritetimer = NULL;
3651 if(!cancelled)
3652 updatelists(1);
3653}
3654
3655static void updatelists(int now)
3656{
3657 if((hmlistname == NULL) || (xmllistname == NULL) || (xmlbz2listname == NULL))
3658 now = 1;
3659 if(!now)
3660 {
3661 if(listwritetimer == NULL)
3662 listwritetimer = timercallback(ntime() + confgetint("cli", "hashwritedelay"), listtimercb, NULL);
3663 return;
3664 }
3665 if(listwritetimer != NULL)
3666 canceltimer(listwritetimer);
3667 updatehmlist();
3668 updatexmllist();
3669 updatexmlbz2list();
3670}
3671
3672static int shareupdate(unsigned long long uusharesize, void *data)
3673{
3674 updatelists(0);
3675 return(0);
3676}
3677
3678static char *quotestr(char *str)
3679{
3680 unsigned char *buf;
3681 unsigned char *p;
3682 size_t bufsize, bufdata;
3683 wchar_t *wbuf;
3684 static char *enc = NULL;
3685 size_t encsize, encdata;
3686
3687 buf = NULL;
3688 bufsize = bufdata = 0;
3689 for(p = (unsigned char *)str; *p; p++)
3690 {
3691 if(*p == '\b')
3692 bufcat(buf, "\\b", 2);
3693 else if(*p == '\t')
3694 bufcat(buf, "\\t", 2);
3695 else if(*p == '\n')
3696 bufcat(buf, "\\n", 2);
3697 else if(*p == '\r')
3698 bufcat(buf, "\\r", 2);
3699 else if(*p == '\\')
3700 bufcat(buf, "\\\\", 2);
3701 else if(*p >= 32)
3702 addtobuf(buf, *p);
3703 else
3704 bprintf(buf, "\\x%02x", *p);
3705 }
3706 addtobuf(buf, 0);
3707 if(enc != NULL)
3708 free(enc);
3709 enc = NULL;
3710 if((wbuf = icmbstowcs((char *)buf, DCCHARSET)) != NULL)
3711 {
3712 enc = icwcstombs(wbuf, NULL);
3713 free(wbuf);
3714 }
3715 if(enc == NULL)
3716 {
3717 encsize = encdata = 0;
3718 for(p = buf; *p; p++) {
3719 if(*p < 128)
3720 addtobuf(enc, *p);
3721 else
3722 bprintf(buf, "\\x%x", *p);
3723 }
3724 }
3725 free(buf);
3726 return(enc);
3727}
3728
3729static void logunimpl(char *list, char *cmd, char *args)
3730{
3731 FILE *log;
3732
3733 if((log = fopen("/tmp/dc-unimpl", "a")) == NULL)
3734 {
3735 flog(LOG_WARNING, "could not open unimpl log: %s", strerror(errno));
3736 return;
3737 }
3738 fputs(list, log);
3739 fputc('\t', log);
3740 fputs(quotestr(cmd), log);
3741 if(args != NULL)
3742 {
3743 fputc('\t', log);
3744 fputs(quotestr(args), log);
3745 }
3746 fputc('\n', log);
3747 fclose(log);
3748}
3749
3750static void dispatchcommand(struct qcommand *qcmd, struct command *cmdlist, struct socket *sk, void *data)
3751{
3752 char *p;
3753 struct command *cmd;
3754
3755 if((p = strchr(qcmd->string, ' ')) != NULL)
3756 *(p++) = 0;
3757 for(cmd = cmdlist; cmd->handler != NULL; cmd++)
3758 {
3759 if(!strcmp(cmd->name, qcmd->string))
3760 break;
3761 }
3762 if(cmd->handler != NULL)
3763 {
3764 cmd->handler(sk, data, qcmd->string, p);
3765 } else if(confgetint("dc", "logunimpl")) {
3766 if(cmdlist == hubcmds)
3767 logunimpl("hub", qcmd->string, p);
3768 else if(cmdlist == peercmds)
3769 logunimpl("peer", qcmd->string, p);
3770 else
3771 logunimpl("other?!", qcmd->string, p);
3772 }
3773}
3774
3775static int run(void)
3776{
3777 struct fnetnode *fn, *nextfn;
3778 struct dchub *hub;
3779 struct dcpeer *peer, *nextpeer;
3780 struct qcommand *qcmd;
3781 int ret, quota;
3782
3783 ret = 0;
3784 quota = 20;
3785 for(fn = fnetnodes; fn != NULL; fn = nextfn)
3786 {
3787 nextfn = fn->next;
3788 if(fn->fnet != &dcnet)
3789 continue;
3790 if(fn->data == NULL)
3791 continue;
3792 hub = (struct dchub *)fn->data;
3793 while((quota > 0) && ((qcmd = ulqcmd(&hub->queue)) != NULL))
3794 {
3795 if(*qcmd->string == '$')
3796 {
3797 if((hub->sk != NULL) && (hub->sk->state == SOCK_EST))
3798 dispatchcommand(qcmd, hubcmds, hub->sk, fn);
3799 } else if(*qcmd->string != 0) {
3800 hubrecvchat(hub->sk, fn, NULL, qcmd->string);
3801 }
3802 freeqcmd(qcmd);
3803 ret = 1;
3804 quota--;
3805 }
3806 if(hub->queue.size < 1000)
3807 hubread(hub->sk, fn);
3808 if(quota < 1)
3809 break;
3810 }
3811 quota = 20;
3812 for(peer = peers; peer != NULL; peer = peer->next)
3813 {
3814 while(!peer->close && (quota > 0) && ((qcmd = ulqcmd(&peer->queue)) != NULL))
3815 {
3816 if(peer->timeout != NULL)
3817 canceltimer(peer->timeout);
3818 peer->timeout = timercallback(ntime() + 180, (void (*)(int, void *))peertimeout, peer);
3819 if(*qcmd->string == '$')
3820 dispatchcommand(qcmd, peercmds, peer->sk, peer);
3821 freeqcmd(qcmd);
3822 ret = 1;
3823 quota--;
3824 }
3825 if((peer->queue.size < 50) && (peer->inbufdata < 500000))
3826 peerread(peer->sk, peer);
3827 if(quota < 1)
3828 break;
3829 }
3830 for(peer = peers; peer != NULL; peer = nextpeer)
3831 {
3832 nextpeer = peer->next;
3833 if(peer->close)
3834 freedcpeer(peer);
3835 }
3836 return(ret);
3837}
3838
3839static void preinit(int hup)
3840{
3841 if(hup)
3842 return;
3843 regfnet(&dcnet);
3844}
3845
3846static int updateudpport(struct configvar *var, void *uudata)
3847{
3848 struct sockaddr_in addr;
3849 struct socket *newsock;
3850
3851 memset(&addr, 0, sizeof(addr));
3852 addr.sin_family = AF_INET;
3853 addr.sin_port = htons(var->val.num);
3854 if((newsock = netcsdgram((struct sockaddr *)&addr, sizeof(addr))) == NULL)
3855 {
3856 flog(LOG_WARNING, "could not create new DC UDP socket, reverting to old: %s", strerror(errno));
3857 return(0);
3858 }
3859 newsock->readcb = udpread;
3860 if(udpsock != NULL)
3861 putsock(udpsock);
3862 udpsock = newsock;
3863 return(0);
3864}
3865
3866static int updatetcpport(struct configvar *var, void *uudata)
3867{
3868 struct sockaddr_in addr;
3869 struct lport *newsock;
3870
3871 memset(&addr, 0, sizeof(addr));
3872 addr.sin_family = AF_INET;
3873 addr.sin_port = htons(var->val.num);
3874 if((newsock = netcslisten(SOCK_STREAM, (struct sockaddr *)&addr, sizeof(addr), peeraccept, NULL)) == NULL)
3875 flog(LOG_INFO, "could not listen to a remote address, going into passive mode");
3876 if(tcpsock != NULL)
3877 closelport(tcpsock);
3878 tcpsock = newsock;
3879 return(0);
3880}
3881
3882static int init(int hup)
3883{
3884 struct sockaddr_in addr;
3885
3886 if(!hup)
3887 {
3888 GCBREG(sharechangecb, shareupdate, NULL);
3889 if(udpsock != NULL)
3890 putsock(udpsock);
3891 if(tcpsock != NULL)
3892 closelport(tcpsock);
3893 addr.sin_family = AF_INET;
3894 memset(&addr.sin_addr, 0, sizeof(addr.sin_addr));
3895 addr.sin_port = htons(confgetint("dc", "udpport"));
3896 if((udpsock = netcsdgram((struct sockaddr *)&addr, sizeof(addr))) == NULL)
3897 {
3898 flog(LOG_CRIT, "could not create DC UDP socket: %s", strerror(errno));
3899 return(1);
3900 }
3901 udpsock->readcb = udpread;
3902 addr.sin_port = htons(confgetint("dc", "tcpport"));
3903 if((tcpsock = netcslisten(SOCK_STREAM, (struct sockaddr *)&addr, sizeof(addr), peeraccept, NULL)) == NULL)
3904 flog(LOG_INFO, "could not listen to a remote address, going into passive mode");
3905 CBREG(confgetvar("dc", "udpport"), conf_update, updateudpport, NULL, NULL);
3906 CBREG(confgetvar("dc", "tcpport"), conf_update, updatetcpport, NULL, NULL);
3907 CBREG(confgetvar("net", "mode"), conf_update, updatetcpport, NULL, NULL);
3908 }
3909 return(0);
3910}
3911
3912static void terminate(void)
3913{
3914 if(hmlistname != NULL)
3915 {
3916 unlink(hmlistname);
3917 free(hmlistname);
3918 }
3919 if(xmllistname != NULL)
3920 {
3921 unlink(xmllistname);
3922 free(xmllistname);
3923 }
3924 if(xmlbz2listname != NULL)
3925 {
3926 unlink(xmlbz2listname);
3927 free(xmlbz2listname);
3928 }
3929}
3930
3931static struct configvar myvars[] =
3932{
3933 /** Specifies the share description reported to other DC users. */
3934 {CONF_VAR_STRING, "desc", {.str = L""}},
3935 /** Specifies the speed reported to other DC users. Normal values
3936 * are 28.8Kbps, 33.6Kbps, 56Kbps, Satellite, ISDN, DSL, Cable,
3937 * LAN(T1) or LAN(T3)*/
3938 {CONF_VAR_STRING, "speedstring", {.str = L"LAN(T1)"}},
3939 /** The e-mail address to report to other DC users. */
3940 {CONF_VAR_STRING, "email", {.str = L"spam@spam.org"}},
3941 /** Specifies a specific UDP port to use for DC search results. If
3942 * left unspecified, a port is allocated dynamically. Useful for
3943 * NAT routers (see also the net.visibleipv4 address for those
3944 * cases). */
3945 {CONF_VAR_INT, "udpport", {.num = 0}},
3946 /** Specifies a specific TCP port to use for DC peer
3947 * connections. If left unspecified, a port is allocated
3948 * dynamically. Useful for NAT routers (see also the
3949 * net.visibleipv4 address for those cases). */
3950 {CONF_VAR_INT, "tcpport", {.num = 0}},
3951 /** If set to true, doldacond will do its best to emulate DC++
3952 * (currently v0.674). This should be left off if at all possible,
3953 * since turning it on will violate the rules of most hubs and
3954 * thus give hub owners an actual reason to kick you if it is
3955 * detected. It might be needed for some of the more bone-headed
3956 * hub owners, though. Note that DC++ emulation can also be turned
3957 * on or off for individual hubs, overriding this setting. */
3958 {CONF_VAR_BOOL, "dcppemu", {.num = 0}},
3959 /** Use for debugging. If set to true, doldacond will log all
3960 * unknown commands it receives, and their arguments, to
3961 * /tmp/dc-unimpl. */
3962 {CONF_VAR_BOOL, "logunimpl", {.num = 0}},
3963 /** If set to true, doldacond will hide its support for deflate
3964 * compression of transfers from other clients, so that they will
3965 * not request compressed uploads. Compressed transfers may
3966 * consume a non-trivial amount of CPU time on slower machines. */
3967 {CONF_VAR_BOOL, "hidedeflate", {.num = 0}},
3968 {CONF_VAR_END}
3969};
3970
3971static struct module me =
3972{
3973 .conf =
3974 {
3975 .vars = myvars
3976 },
3977 .preinit = preinit,
3978 .init = init,
3979 .run = run,
3980 .terminate = terminate,
3981 .name = "dc"
3982};
3983
3984MODULE(me)
Dolda Connect