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root/svn/ircd-hybrid-8/src/s_serv.c
Revision: 1156
Committed: Tue Aug 9 20:29:20 2011 UTC (12 years, 7 months ago) by michael
Content type: text/x-csrc
File size: 61483 byte(s)
Log Message:
- create ircd-hybrid-8 "branch"

File Contents

# Content
1 /*
2 * ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
3 * s_serv.c: Server related functions.
4 *
5 * Copyright (C) 2005 by the past and present ircd coders, and others.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
20 * USA
21 *
22 * $Id$
23 */
24
25 #include "stdinc.h"
26 #ifdef HAVE_LIBCRYPTO
27 #include <openssl/rsa.h>
28 #include "rsa.h"
29 #endif
30 #include "list.h"
31 #include "channel.h"
32 #include "channel_mode.h"
33 #include "client.h"
34 #include "common.h"
35 #include "dbuf.h"
36 #include "event.h"
37 #include "fdlist.h"
38 #include "hash.h"
39 #include "irc_string.h"
40 #include "sprintf_irc.h"
41 #include "ircd.h"
42 #include "ircd_defs.h"
43 #include "s_bsd.h"
44 #include "numeric.h"
45 #include "packet.h"
46 #include "irc_res.h"
47 #include "s_conf.h"
48 #include "s_serv.h"
49 #include "s_log.h"
50 #include "s_user.h"
51 #include "send.h"
52 #include "memory.h"
53 #include "channel.h" /* chcap_usage_counts stuff...*/
54
55 #define MIN_CONN_FREQ 300
56
57 static dlink_list cap_list = { NULL, NULL, 0 };
58 static void server_burst(struct Client *);
59 static int fork_server(struct Client *);
60 static void burst_all(struct Client *);
61 static void send_tb(struct Client *client_p, struct Channel *chptr);
62
63 static CNCB serv_connect_callback;
64
65 static void start_io(struct Client *);
66 static void burst_members(struct Client *, struct Channel *);
67
68 static SlinkRplHnd slink_error;
69 static SlinkRplHnd slink_zipstats;
70
71
72 #ifdef HAVE_LIBCRYPTO
73 struct EncCapability CipherTable[] =
74 {
75 #ifdef HAVE_EVP_BF_CFB
76 { "BF/168", CAP_ENC_BF_168, 24, CIPHER_BF },
77 { "BF/128", CAP_ENC_BF_128, 16, CIPHER_BF },
78 #endif
79 #ifdef HAVE_EVP_CAST5_CFB
80 { "CAST/128", CAP_ENC_CAST_128, 16, CIPHER_CAST },
81 #endif
82 #ifdef HAVE_EVP_IDEA_CFB
83 { "IDEA/128", CAP_ENC_IDEA_128, 16, CIPHER_IDEA },
84 #endif
85 #ifdef HAVE_EVP_RC5_32_12_16_CFB
86 { "RC5.16/128", CAP_ENC_RC5_16_128, 16, CIPHER_RC5_16 },
87 { "RC5.12/128", CAP_ENC_RC5_12_128, 16, CIPHER_RC5_12 },
88 { "RC5.8/128", CAP_ENC_RC5_8_128, 16, CIPHER_RC5_8 },
89 #endif
90 #ifdef HAVE_EVP_DES_EDE3_CFB
91 { "3DES/168", CAP_ENC_3DES_168, 24, CIPHER_3DES },
92 #endif
93 #ifdef HAVE_EVP_DES_CFB
94 { "DES/56", CAP_ENC_DES_56, 8, CIPHER_DES },
95 #endif
96 { 0, 0, 0, 0 }
97 };
98 #endif
99
100 struct SlinkRplDef slinkrpltab[] = {
101 { SLINKRPL_ERROR, slink_error, SLINKRPL_FLAG_DATA },
102 { SLINKRPL_ZIPSTATS, slink_zipstats, SLINKRPL_FLAG_DATA },
103 { 0, 0, 0 },
104 };
105
106
107 void
108 slink_error(unsigned int rpl, unsigned int len, unsigned char *data,
109 struct Client *server_p)
110 {
111 assert(rpl == SLINKRPL_ERROR);
112 assert(len < 256);
113
114 data[len-1] = '\0';
115
116 sendto_realops_flags(UMODE_ALL, L_ALL, "SlinkError for %s: %s",
117 server_p->name, data);
118 /* XXX should this be exit_client? */
119 exit_client(server_p, &me, "servlink error -- terminating link");
120 }
121
122 void
123 slink_zipstats(unsigned int rpl, unsigned int len, unsigned char *data,
124 struct Client *server_p)
125 {
126 struct ZipStats zipstats;
127 uint64_t in = 0, in_wire = 0, out = 0, out_wire = 0;
128 int i = 0;
129
130 assert(rpl == SLINKRPL_ZIPSTATS);
131 assert(len == 16);
132 assert(IsCapable(server_p, CAP_ZIP));
133
134 /* Yes, it needs to be done this way, no we cannot let the compiler
135 * work with the pointer to the structure. This works around a GCC
136 * bug on SPARC that affects all versions at the time of this writing.
137 * I will feed you to the creatures living in RMS's beard if you do
138 * not leave this as is, without being sure that you are not causing
139 * regression for most of our installed SPARC base.
140 * -jmallett, 04/27/2002
141 */
142 memcpy(&zipstats, &server_p->localClient->zipstats, sizeof(struct ZipStats));
143
144 in |= (data[i++] << 24);
145 in |= (data[i++] << 16);
146 in |= (data[i++] << 8);
147 in |= (data[i++] );
148
149 in_wire |= (data[i++] << 24);
150 in_wire |= (data[i++] << 16);
151 in_wire |= (data[i++] << 8);
152 in_wire |= (data[i++] );
153
154 out |= (data[i++] << 24);
155 out |= (data[i++] << 16);
156 out |= (data[i++] << 8);
157 out |= (data[i++] );
158
159 out_wire |= (data[i++] << 24);
160 out_wire |= (data[i++] << 16);
161 out_wire |= (data[i++] << 8);
162 out_wire |= (data[i++] );
163
164 /* This macro adds b to a if a plus b is not an overflow, and sets the
165 * value of a to b if it is.
166 * Add and Set if No Overflow.
167 */
168 #define ASNO(a, b) a = (a + b >= a ? a + b : b)
169
170 ASNO(zipstats.in, in);
171 ASNO(zipstats.out, out);
172 ASNO(zipstats.in_wire, in_wire);
173 ASNO(zipstats.out_wire, out_wire);
174
175 if (zipstats.in > 0)
176 zipstats.in_ratio = (((double)(zipstats.in - zipstats.in_wire) /
177 (double)zipstats.in) * 100.00);
178 else
179 zipstats.in_ratio = 0;
180
181 if (zipstats.out > 0)
182 zipstats.out_ratio = (((double)(zipstats.out - zipstats.out_wire) /
183 (double)zipstats.out) * 100.00);
184 else
185 zipstats.out_ratio = 0;
186
187 memcpy(&server_p->localClient->zipstats, &zipstats, sizeof(struct ZipStats));
188 }
189
190 void
191 collect_zipstats(void *unused)
192 {
193 dlink_node *ptr = NULL;
194
195 DLINK_FOREACH(ptr, serv_list.head)
196 {
197 struct Client *target_p = ptr->data;
198
199 if (IsCapable(target_p, CAP_ZIP))
200 {
201 /* only bother if we haven't already got something queued... */
202 if (!target_p->localClient->slinkq)
203 {
204 target_p->localClient->slinkq = MyMalloc(1); /* sigh.. */
205 target_p->localClient->slinkq[0] = SLINKCMD_ZIPSTATS;
206 target_p->localClient->slinkq_ofs = 0;
207 target_p->localClient->slinkq_len = 1;
208 send_queued_slink_write(target_p);
209 }
210 }
211 }
212 }
213
214 #ifdef HAVE_LIBCRYPTO
215 struct EncCapability *
216 check_cipher(struct Client *client_p, struct AccessItem *aconf)
217 {
218 struct EncCapability *epref = NULL;
219
220 /* Use connect{} specific info if available */
221 if (aconf->cipher_preference)
222 epref = aconf->cipher_preference;
223 else if (ConfigFileEntry.default_cipher_preference)
224 epref = ConfigFileEntry.default_cipher_preference;
225
226 /*
227 * If the server supports the capability in hand, return the matching
228 * conf struct. Otherwise, return NULL (an error).
229 */
230 if (epref && IsCapableEnc(client_p, epref->cap))
231 return epref;
232
233 return NULL;
234 }
235 #endif /* HAVE_LIBCRYPTO */
236
237 /*
238 * write_links_file
239 *
240 * inputs - void pointer which is not used
241 * output - NONE
242 * side effects - called from an event, write out list of linked servers
243 * but in no particular order.
244 */
245 void
246 write_links_file(void* notused)
247 {
248 MessageFileLine *next_mptr = 0;
249 MessageFileLine *mptr = 0;
250 MessageFileLine *currentMessageLine = 0;
251 MessageFileLine *newMessageLine = 0;
252 MessageFile *MessageFileptr;
253 const char *p;
254 FBFILE *file;
255 char buff[512];
256 dlink_node *ptr;
257
258 MessageFileptr = &ConfigFileEntry.linksfile;
259
260 if ((file = fbopen(MessageFileptr->fileName, "w")) == NULL)
261 return;
262
263 for (mptr = MessageFileptr->contentsOfFile; mptr; mptr = next_mptr)
264 {
265 next_mptr = mptr->next;
266 MyFree(mptr);
267 }
268
269 MessageFileptr->contentsOfFile = NULL;
270 currentMessageLine = NULL;
271
272 DLINK_FOREACH(ptr, global_serv_list.head)
273 {
274 size_t nbytes = 0;
275 struct Client *target_p = ptr->data;
276
277 /* skip ourselves, we send ourselves in /links */
278 if (IsMe(target_p))
279 continue;
280
281 /* skip hidden servers */
282 if (IsHidden(target_p) && !ConfigServerHide.disable_hidden)
283 continue;
284
285 if (target_p->info[0])
286 p = target_p->info;
287 else
288 p = "(Unknown Location)";
289
290 newMessageLine = MyMalloc(sizeof(MessageFileLine));
291
292 /* Attempt to format the file in such a way it follows the usual links output
293 * ie "servername uplink :hops info"
294 * Mostly for aesthetic reasons - makes it look pretty in mIRC ;)
295 * - madmax
296 */
297
298 /*
299 * For now, check this ircsprintf wont overflow - it shouldnt on a
300 * default config but it is configurable..
301 * This should be changed to an snprintf at some point, but I'm wanting to
302 * know if this is a cause of a bug - cryogen
303 */
304 assert(strlen(target_p->name) + strlen(me.name) + 6 + strlen(p) <=
305 MESSAGELINELEN);
306 ircsprintf(newMessageLine->line, "%s %s :1 %s",
307 target_p->name, me.name, p);
308 newMessageLine->next = NULL;
309
310 if (MessageFileptr->contentsOfFile)
311 {
312 if (currentMessageLine)
313 currentMessageLine->next = newMessageLine;
314 currentMessageLine = newMessageLine;
315 }
316 else
317 {
318 MessageFileptr->contentsOfFile = newMessageLine;
319 currentMessageLine = newMessageLine;
320 }
321
322 nbytes = ircsprintf(buff, "%s %s :1 %s\n", target_p->name, me.name, p);
323 fbputs(buff, file, nbytes);
324 }
325
326 fbclose(file);
327 }
328
329 /* hunt_server()
330 * Do the basic thing in delivering the message (command)
331 * across the relays to the specific server (server) for
332 * actions.
333 *
334 * Note: The command is a format string and *MUST* be
335 * of prefixed style (e.g. ":%s COMMAND %s ...").
336 * Command can have only max 8 parameters.
337 *
338 * server parv[server] is the parameter identifying the
339 * target server.
340 *
341 * *WARNING*
342 * parv[server] is replaced with the pointer to the
343 * real servername from the matched client (I'm lazy
344 * now --msa).
345 *
346 * returns: (see #defines)
347 */
348 int
349 hunt_server(struct Client *client_p, struct Client *source_p, const char *command,
350 int server, int parc, char *parv[])
351 {
352 struct Client *target_p = NULL;
353 struct Client *target_tmp = NULL;
354 dlink_node *ptr;
355 int wilds;
356
357 /* Assume it's me, if no server
358 */
359 if (parc <= server || EmptyString(parv[server]) ||
360 match(me.name, parv[server]) ||
361 match(parv[server], me.name) ||
362 !strcmp(parv[server], me.id))
363 return(HUNTED_ISME);
364
365 /* These are to pickup matches that would cause the following
366 * message to go in the wrong direction while doing quick fast
367 * non-matching lookups.
368 */
369 if (MyClient(source_p))
370 target_p = find_client(parv[server]);
371 else
372 target_p = find_person(client_p, parv[server]);
373
374 if (target_p)
375 if (target_p->from == source_p->from && !MyConnect(target_p))
376 target_p = NULL;
377
378 if (target_p == NULL && (target_p = find_server(parv[server])))
379 if (target_p->from == source_p->from && !MyConnect(target_p))
380 target_p = NULL;
381
382 collapse(parv[server]);
383 wilds = (strchr(parv[server], '?') || strchr(parv[server], '*'));
384
385 /* Again, if there are no wild cards involved in the server
386 * name, use the hash lookup
387 */
388 if (target_p == NULL)
389 {
390 if (!wilds)
391 {
392 if (!(target_p = find_server(parv[server])))
393 {
394 sendto_one(source_p, form_str(ERR_NOSUCHSERVER),
395 me.name, parv[0], parv[server]);
396 return(HUNTED_NOSUCH);
397 }
398 }
399 else
400 {
401 DLINK_FOREACH(ptr, global_client_list.head)
402 {
403 target_tmp = ptr->data;
404
405 if (match(parv[server], target_tmp->name))
406 {
407 if (target_tmp->from == source_p->from && !MyConnect(target_tmp))
408 continue;
409 target_p = ptr->data;
410
411 if (IsRegistered(target_p) && (target_p != client_p))
412 break;
413 }
414 }
415 }
416 }
417
418 if (target_p != NULL)
419 {
420 if(!IsRegistered(target_p))
421 {
422 sendto_one(source_p, form_str(ERR_NOSUCHSERVER),
423 me.name, parv[0], parv[server]);
424 return HUNTED_NOSUCH;
425 }
426
427 if (IsMe(target_p) || MyClient(target_p))
428 return HUNTED_ISME;
429
430 if (!match(target_p->name, parv[server]))
431 parv[server] = target_p->name;
432
433 /* This is a little kludgy but should work... */
434 if (IsClient(source_p) &&
435 ((MyConnect(target_p) && IsCapable(target_p, CAP_TS6)) ||
436 (!MyConnect(target_p) && IsCapable(target_p->from, CAP_TS6))))
437 parv[0] = ID(source_p);
438
439 sendto_one(target_p, command, parv[0],
440 parv[1], parv[2], parv[3], parv[4],
441 parv[5], parv[6], parv[7], parv[8]);
442 return(HUNTED_PASS);
443 }
444
445 sendto_one(source_p, form_str(ERR_NOSUCHSERVER),
446 me.name, parv[0], parv[server]);
447 return(HUNTED_NOSUCH);
448 }
449
450 /* try_connections()
451 *
452 * inputs - void pointer which is not used
453 * output - NONE
454 * side effects -
455 * scan through configuration and try new connections.
456 * Returns the calendar time when the next call to this
457 * function should be made latest. (No harm done if this
458 * is called earlier or later...)
459 */
460 void
461 try_connections(void *unused)
462 {
463 dlink_node *ptr;
464 struct ConfItem *conf;
465 struct AccessItem *aconf;
466 struct ClassItem *cltmp;
467 int confrq;
468
469 /* TODO: change this to set active flag to 0 when added to event! --Habeeb */
470 if (GlobalSetOptions.autoconn == 0)
471 return;
472
473 DLINK_FOREACH(ptr, server_items.head)
474 {
475 conf = ptr->data;
476 aconf = map_to_conf(conf);
477
478 /* Also when already connecting! (update holdtimes) --SRB
479 */
480 if (!(aconf->status & CONF_SERVER) || !aconf->port ||
481 !(IsConfAllowAutoConn(aconf)))
482 continue;
483
484 cltmp = map_to_conf(aconf->class_ptr);
485
486 /* Skip this entry if the use of it is still on hold until
487 * future. Otherwise handle this entry (and set it on hold
488 * until next time). Will reset only hold times, if already
489 * made one successfull connection... [this algorithm is
490 * a bit fuzzy... -- msa >;) ]
491 */
492 if (aconf->hold > CurrentTime)
493 continue;
494
495 if (cltmp == NULL)
496 confrq = DEFAULT_CONNECTFREQUENCY;
497 else
498 {
499 confrq = ConFreq(cltmp);
500 if (confrq < MIN_CONN_FREQ )
501 confrq = MIN_CONN_FREQ;
502 }
503
504 aconf->hold = CurrentTime + confrq;
505
506 /* Found a CONNECT config with port specified, scan clients
507 * and see if this server is already connected?
508 */
509 if (find_server(conf->name) != NULL)
510 continue;
511
512 if (CurrUserCount(cltmp) < MaxTotal(cltmp))
513 {
514 /* Go to the end of the list, if not already last */
515 if (ptr->next != NULL)
516 {
517 dlinkDelete(ptr, &server_items);
518 dlinkAddTail(conf, &conf->node, &server_items);
519 }
520
521 if (find_servconn_in_progress(conf->name))
522 return;
523
524 /* We used to only print this if serv_connect() actually
525 * succeeded, but since comm_tcp_connect() can call the callback
526 * immediately if there is an error, we were getting error messages
527 * in the wrong order. SO, we just print out the activated line,
528 * and let serv_connect() / serv_connect_callback() print an
529 * error afterwards if it fails.
530 * -- adrian
531 */
532 if (ConfigServerHide.hide_server_ips)
533 sendto_realops_flags(UMODE_ALL, L_ALL, "Connection to %s activated.",
534 conf->name);
535 else
536 sendto_realops_flags(UMODE_ALL, L_ALL, "Connection to %s[%s] activated.",
537 conf->name, aconf->host);
538
539 serv_connect(aconf, NULL);
540 /* We connect only one at time... */
541 return;
542 }
543 }
544 }
545
546 int
547 valid_servname(const char *name)
548 {
549 unsigned int length = 0;
550 unsigned int dots = 0;
551 const char *p = name;
552
553 for (; *p; ++p)
554 {
555 if (!IsServChar(*p))
556 return 0;
557
558 ++length;
559
560 if (*p == '.')
561 ++dots;
562 }
563
564 return dots != 0 && length <= HOSTLEN;
565 }
566
567 int
568 check_server(const char *name, struct Client *client_p, int cryptlink)
569 {
570 dlink_node *ptr;
571 struct ConfItem *conf = NULL;
572 struct ConfItem *server_conf = NULL;
573 struct AccessItem *server_aconf = NULL;
574 struct AccessItem *aconf = NULL;
575 int error = -1;
576
577 assert(client_p != NULL);
578
579 if (client_p == NULL)
580 return(error);
581
582 if (strlen(name) > HOSTLEN)
583 return(-4);
584
585 /* loop through looking for all possible connect items that might work */
586 DLINK_FOREACH(ptr, server_items.head)
587 {
588 conf = ptr->data;
589 aconf = map_to_conf(conf);
590
591 if (!match(name, conf->name))
592 continue;
593
594 error = -3;
595
596 /* XXX: Fix me for IPv6 */
597 /* XXX sockhost is the IPv4 ip as a string */
598 if (match(aconf->host, client_p->host) ||
599 match(aconf->host, client_p->sockhost))
600 {
601 error = -2;
602 #ifdef HAVE_LIBCRYPTO
603 if (cryptlink && IsConfCryptLink(aconf))
604 {
605 if (aconf->rsa_public_key)
606 server_conf = conf;
607 }
608 else if (!(cryptlink || IsConfCryptLink(aconf)))
609 #endif /* HAVE_LIBCRYPTO */
610 {
611 /* A NULL password is as good as a bad one */
612 if (EmptyString(client_p->localClient->passwd))
613 return(-2);
614
615 /* code in s_conf.c should not have allowed this to be NULL */
616 if (aconf->passwd == NULL)
617 return(-2);
618
619 if (IsConfEncrypted(aconf))
620 {
621 if (strcmp(aconf->passwd,
622 (const char *)crypt(client_p->localClient->passwd,
623 aconf->passwd)) == 0)
624 server_conf = conf;
625 }
626 else
627 {
628 if (strcmp(aconf->passwd, client_p->localClient->passwd) == 0)
629 server_conf = conf;
630 }
631 }
632 }
633 }
634
635 if (server_conf == NULL)
636 return(error);
637
638 attach_conf(client_p, server_conf);
639
640 /* Now find all leaf or hub config items for this server */
641 DLINK_FOREACH(ptr, hub_items.head)
642 {
643 conf = ptr->data;
644
645 if (!match(name, conf->name))
646 continue;
647 attach_conf(client_p, conf);
648 }
649
650 DLINK_FOREACH(ptr, leaf_items.head)
651 {
652 conf = ptr->data;
653
654 if (!match(name, conf->name))
655 continue;
656 attach_conf(client_p, conf);
657 }
658
659 server_aconf = map_to_conf(server_conf);
660
661 #ifdef HAVE_LIBZ /* otherwise, clear it unconditionally */
662 if (!IsConfCompressed(server_aconf))
663 #endif
664 ClearCap(client_p, CAP_ZIP);
665 if (!IsConfCryptLink(server_aconf))
666 ClearCap(client_p, CAP_ENC);
667 if (!IsConfTopicBurst(server_aconf))
668 {
669 ClearCap(client_p, CAP_TB);
670 ClearCap(client_p, CAP_TBURST);
671 }
672
673 if (aconf != NULL)
674 {
675 struct sockaddr_in *v4;
676 #ifdef IPV6
677 struct sockaddr_in6 *v6;
678 #endif
679 switch (aconf->aftype)
680 {
681 #ifdef IPV6
682 case AF_INET6:
683 v6 = (struct sockaddr_in6 *)&aconf->ipnum;
684
685 if (IN6_IS_ADDR_UNSPECIFIED(&v6->sin6_addr))
686 memcpy(&aconf->ipnum, &client_p->localClient->ip, sizeof(struct irc_ssaddr));
687 break;
688 #endif
689 case AF_INET:
690 v4 = (struct sockaddr_in *)&aconf->ipnum;
691
692 if (v4->sin_addr.s_addr == INADDR_NONE)
693 memcpy(&aconf->ipnum, &client_p->localClient->ip, sizeof(struct irc_ssaddr));
694 break;
695 }
696 }
697
698 return(0);
699 }
700
701 /* add_capability()
702 *
703 * inputs - string name of CAPAB
704 * - int flag of capability
705 * output - NONE
706 * side effects - Adds given capability name and bit mask to
707 * current supported capabilities. This allows
708 * modules to dynamically add or subtract their capability.
709 */
710 void
711 add_capability(const char *capab_name, int cap_flag, int add_to_default)
712 {
713 struct Capability *cap = MyMalloc(sizeof(*cap));
714
715 DupString(cap->name, capab_name);
716 cap->cap = cap_flag;
717 dlinkAdd(cap, &cap->node, &cap_list);
718
719 if (add_to_default)
720 default_server_capabs |= cap_flag;
721 }
722
723 /* delete_capability()
724 *
725 * inputs - string name of CAPAB
726 * output - NONE
727 * side effects - delete given capability from ones known.
728 */
729 int
730 delete_capability(const char *capab_name)
731 {
732 dlink_node *ptr;
733 dlink_node *next_ptr;
734 struct Capability *cap;
735
736 DLINK_FOREACH_SAFE(ptr, next_ptr, cap_list.head)
737 {
738 cap = ptr->data;
739
740 if (cap->cap != 0)
741 {
742 if (irccmp(cap->name, capab_name) == 0)
743 {
744 default_server_capabs &= ~(cap->cap);
745 dlinkDelete(ptr, &cap_list);
746 MyFree(cap->name);
747 cap->name = NULL;
748 MyFree(cap);
749 }
750 }
751 }
752
753 return 0;
754 }
755
756 /*
757 * find_capability()
758 *
759 * inputs - string name of capab to find
760 * output - 0 if not found CAPAB otherwise
761 * side effects - none
762 */
763 int
764 find_capability(const char *capab)
765 {
766 const dlink_node *ptr = NULL;
767
768 DLINK_FOREACH(ptr, cap_list.head)
769 {
770 const struct Capability *cap = ptr->data;
771
772 if (cap->cap && !irccmp(cap->name, capab))
773 return cap->cap;
774 }
775
776 return 0;
777 }
778
779 /* send_capabilities()
780 *
781 * inputs - Client pointer to send to
782 * - Pointer to AccessItem (for crypt)
783 * - int flag of capabilities that this server can send
784 * - int flag of encryption capabilities
785 * output - NONE
786 * side effects - send the CAPAB line to a server -orabidoo
787 *
788 */
789 void
790 send_capabilities(struct Client *client_p, struct AccessItem *aconf,
791 int cap_can_send, int enc_can_send)
792 {
793 struct Capability *cap=NULL;
794 char msgbuf[IRCD_BUFSIZE];
795 char *t;
796 int tl;
797 dlink_node *ptr;
798 #ifdef HAVE_LIBCRYPTO
799 const struct EncCapability *epref = NULL;
800 char *capend;
801 int sent_cipher = 0;
802 #endif
803
804 t = msgbuf;
805
806 DLINK_FOREACH(ptr, cap_list.head)
807 {
808 cap = ptr->data;
809
810 if (cap->cap & (cap_can_send|default_server_capabs))
811 {
812 tl = ircsprintf(t, "%s ", cap->name);
813 t += tl;
814 }
815 }
816 #ifdef HAVE_LIBCRYPTO
817 if (enc_can_send)
818 {
819 capend = t;
820 strcpy(t, "ENC:");
821 t += 4;
822
823 /* use connect{} specific info if available */
824 if (aconf->cipher_preference)
825 epref = aconf->cipher_preference;
826 else if (ConfigFileEntry.default_cipher_preference)
827 epref = ConfigFileEntry.default_cipher_preference;
828
829 if (epref && (epref->cap & enc_can_send))
830 {
831 /* Leave the space -- it is removed later. */
832 tl = ircsprintf(t, "%s ", epref->name);
833 t += tl;
834 sent_cipher = 1;
835 }
836
837 if (!sent_cipher)
838 t = capend; /* truncate string before ENC:, below */
839 }
840 #endif
841 *(t - 1) = '\0';
842 sendto_one(client_p, "CAPAB :%s", msgbuf);
843 }
844
845 /* sendnick_TS()
846 *
847 * inputs - client (server) to send nick towards
848 * - client to send nick for
849 * output - NONE
850 * side effects - NICK message is sent towards given client_p
851 */
852 void
853 sendnick_TS(struct Client *client_p, struct Client *target_p)
854 {
855 static char ubuf[12];
856
857 if (!IsClient(target_p))
858 return;
859
860 send_umode(NULL, target_p, 0, IsOperHiddenAdmin(target_p) ?
861 SEND_UMODES & ~UMODE_ADMIN : SEND_UMODES, ubuf);
862
863 if (ubuf[0] == '\0')
864 {
865 ubuf[0] = '+';
866 ubuf[1] = '\0';
867 }
868
869 /* XXX Both of these need to have a :me.name or :mySID!?!?! */
870 if (HasID(target_p) && IsCapable(client_p, CAP_TS6))
871 sendto_one(client_p, ":%s UID %s %d %lu %s %s %s %s %s :%s",
872 target_p->servptr->id,
873 target_p->name, target_p->hopcount + 1,
874 (unsigned long) target_p->tsinfo,
875 ubuf, target_p->username, target_p->host,
876 (MyClient(target_p) && IsIPSpoof(target_p)) ?
877 "0" : target_p->sockhost, target_p->id, target_p->info);
878 else
879 sendto_one(client_p, "NICK %s %d %lu %s %s %s %s :%s",
880 target_p->name, target_p->hopcount + 1,
881 (unsigned long) target_p->tsinfo,
882 ubuf, target_p->username, target_p->host,
883 target_p->servptr->name, target_p->info);
884
885 if (IsConfAwayBurst((struct AccessItem *)map_to_conf(client_p->serv->sconf)))
886 if (!EmptyString(target_p->away))
887 sendto_one(client_p, ":%s AWAY :%s", target_p->name,
888 target_p->away);
889
890 }
891
892 /*
893 * show_capabilities - show current server capabilities
894 *
895 * inputs - pointer to a struct Client
896 * output - pointer to static string
897 * side effects - build up string representing capabilities of server listed
898 */
899 const char *
900 show_capabilities(struct Client *target_p)
901 {
902 static char msgbuf[IRCD_BUFSIZE];
903 char *t = msgbuf;
904 dlink_node *ptr;
905
906 t += ircsprintf(msgbuf, "TS ");
907
908 DLINK_FOREACH(ptr, cap_list.head)
909 {
910 const struct Capability *cap = ptr->data;
911
912 if (IsCapable(target_p, cap->cap))
913 t += ircsprintf(t, "%s ", cap->name);
914 }
915 #ifdef HAVE_LIBCRYPTO
916 if (IsCapable(target_p, CAP_ENC) &&
917 target_p->localClient->in_cipher &&
918 target_p->localClient->out_cipher)
919 t += ircsprintf(t, "ENC:%s ",
920 target_p->localClient->in_cipher->name);
921 #endif
922 *(t - 1) = '\0';
923
924 return(msgbuf);
925 }
926
927 /* make_server()
928 *
929 * inputs - pointer to client struct
930 * output - pointer to struct Server
931 * side effects - add's an Server information block to a client
932 * if it was not previously allocated.
933 */
934 struct Server *
935 make_server(struct Client *client_p)
936 {
937 if (client_p->serv == NULL)
938 client_p->serv = MyMalloc(sizeof(struct Server));
939
940 return client_p->serv;
941 }
942
943 /* server_estab()
944 *
945 * inputs - pointer to a struct Client
946 * output -
947 * side effects -
948 */
949 void
950 server_estab(struct Client *client_p)
951 {
952 struct Client *target_p;
953 struct ConfItem *conf;
954 struct AccessItem *aconf=NULL;
955 char *host;
956 const char *inpath;
957 static char inpath_ip[HOSTLEN * 2 + USERLEN + 6];
958 dlink_node *ptr;
959
960 assert(client_p != NULL);
961
962 strlcpy(inpath_ip, get_client_name(client_p, SHOW_IP), sizeof(inpath_ip));
963
964 inpath = get_client_name(client_p, MASK_IP); /* "refresh" inpath with host */
965 host = client_p->name;
966
967 if ((conf = find_conf_name(&client_p->localClient->confs, host, SERVER_TYPE))
968 == NULL)
969 {
970 /* This shouldn't happen, better tell the ops... -A1kmm */
971 sendto_realops_flags(UMODE_ALL, L_ALL, "Warning: Lost connect{} block "
972 "for server %s(this shouldn't happen)!", host);
973 exit_client(client_p, &me, "Lost connect{} block!");
974 return;
975 }
976
977 MyFree(client_p->localClient->passwd);
978 client_p->localClient->passwd = NULL;
979
980 /* Its got identd, since its a server */
981 SetGotId(client_p);
982
983 /* If there is something in the serv_list, it might be this
984 * connecting server..
985 */
986 if (!ServerInfo.hub && serv_list.head)
987 {
988 if (client_p != serv_list.head->data || serv_list.head->next)
989 {
990 ++ServerStats.is_ref;
991 sendto_one(client_p, "ERROR :I'm a leaf not a hub");
992 exit_client(client_p, &me, "I'm a leaf");
993 return;
994 }
995 }
996
997 aconf = map_to_conf(conf);
998
999 if (IsUnknown(client_p) && !IsConfCryptLink(aconf))
1000 {
1001 /* jdc -- 1. Use EmptyString(), not [0] index reference.
1002 * 2. Check aconf->spasswd, not aconf->passwd.
1003 */
1004 if (!EmptyString(aconf->spasswd))
1005 sendto_one(client_p, "PASS %s TS %d %s",
1006 aconf->spasswd, TS_CURRENT, me.id);
1007
1008 /* Pass my info to the new server
1009 *
1010 * Pass on ZIP if supported
1011 * Pass on TB if supported.
1012 * - Dianora
1013 */
1014
1015 send_capabilities(client_p, aconf,
1016 (IsConfCompressed(aconf) ? CAP_ZIP : 0)
1017 | (IsConfTopicBurst(aconf) ? CAP_TBURST|CAP_TB : 0), 0);
1018
1019 /* SERVER is the last command sent before switching to ziplinks.
1020 * We set TCPNODELAY on the socket to make sure it gets sent out
1021 * on the wire immediately. Otherwise, it could be sitting in
1022 * a kernel buffer when we start sending zipped data, and the
1023 * parser on the receiving side can't hand both unzipped and zipped
1024 * data in one packet. --Rodder
1025 *
1026 * currently we only need to call send_queued_write,
1027 * Nagle is already disabled at this point --adx
1028 */
1029 sendto_one(client_p, "SERVER %s 1 :%s%s",
1030 me.name, ConfigServerHide.hidden ? "(H) " : "", me.info);
1031 send_queued_write(client_p);
1032 }
1033
1034 /* Hand the server off to servlink now */
1035 if (IsCapable(client_p, CAP_ENC) || IsCapable(client_p, CAP_ZIP))
1036 {
1037 if (fork_server(client_p) < 0)
1038 {
1039 sendto_realops_flags(UMODE_ALL, L_ADMIN,
1040 "Warning: fork failed for server %s -- check servlink_path (%s)",
1041 get_client_name(client_p, HIDE_IP), ConfigFileEntry.servlink_path);
1042 sendto_realops_flags(UMODE_ALL, L_OPER, "Warning: fork failed for server "
1043 "%s -- check servlink_path (%s)",
1044 get_client_name(client_p, MASK_IP),
1045 ConfigFileEntry.servlink_path);
1046 exit_client(client_p, &me, "fork failed");
1047 return;
1048 }
1049
1050 start_io(client_p);
1051 SetServlink(client_p);
1052 }
1053
1054 sendto_one(client_p, "SVINFO %d %d 0 :%lu", TS_CURRENT, TS_MIN,
1055 (unsigned long)CurrentTime);
1056
1057 /* assumption here is if they passed the correct TS version, they also passed an SID */
1058 if (IsCapable(client_p, CAP_TS6))
1059 hash_add_id(client_p);
1060
1061 /* XXX Does this ever happen? I don't think so -db */
1062 detach_conf(client_p, OPER_TYPE);
1063
1064 /* *WARNING*
1065 ** In the following code in place of plain server's
1066 ** name we send what is returned by get_client_name
1067 ** which may add the "sockhost" after the name. It's
1068 ** *very* *important* that there is a SPACE between
1069 ** the name and sockhost (if present). The receiving
1070 ** server will start the information field from this
1071 ** first blank and thus puts the sockhost into info.
1072 ** ...a bit tricky, but you have been warned, besides
1073 ** code is more neat this way... --msa
1074 */
1075 client_p->servptr = &me;
1076
1077 if (IsClosing(client_p))
1078 return;
1079
1080 SetServer(client_p);
1081
1082 /* Update the capability combination usage counts. -A1kmm */
1083 set_chcap_usage_counts(client_p);
1084
1085 /* Some day, all these lists will be consolidated *sigh* */
1086 dlinkAdd(client_p, &client_p->lnode, &me.serv->server_list);
1087
1088 assert(dlinkFind(&unknown_list, client_p));
1089
1090 dlink_move_node(&client_p->localClient->lclient_node,
1091 &unknown_list, &serv_list);
1092
1093 Count.myserver++;
1094
1095 dlinkAdd(client_p, make_dlink_node(), &global_serv_list);
1096 hash_add_client(client_p);
1097
1098 /* doesnt duplicate client_p->serv if allocated this struct already */
1099 make_server(client_p);
1100
1101 /* fixing eob timings.. -gnp */
1102 client_p->firsttime = CurrentTime;
1103
1104 /* Show the real host/IP to admins */
1105 sendto_realops_flags(UMODE_ALL, L_ADMIN,
1106 "Link with %s established: (%s) link",
1107 inpath_ip,show_capabilities(client_p));
1108 /* Now show the masked hostname/IP to opers */
1109 sendto_realops_flags(UMODE_ALL, L_OPER,
1110 "Link with %s established: (%s) link",
1111 inpath,show_capabilities(client_p));
1112 ilog(L_NOTICE, "Link with %s established: (%s) link",
1113 inpath_ip, show_capabilities(client_p));
1114
1115 client_p->serv->sconf = conf;
1116
1117 if (HasServlink(client_p))
1118 {
1119 /* we won't overflow FD_DESC_SZ here, as it can hold
1120 * client_p->name + 64
1121 */
1122 fd_note(&client_p->localClient->fd, "slink data: %s", client_p->name);
1123 fd_note(&client_p->localClient->ctrlfd, "slink ctrl: %s", client_p->name);
1124 }
1125 else
1126 fd_note(&client_p->localClient->fd, "Server: %s", client_p->name);
1127
1128 /* Old sendto_serv_but_one() call removed because we now
1129 ** need to send different names to different servers
1130 ** (domain name matching) Send new server to other servers.
1131 */
1132 DLINK_FOREACH(ptr, serv_list.head)
1133 {
1134 target_p = ptr->data;
1135
1136 if (target_p == client_p)
1137 continue;
1138
1139 if (IsCapable(target_p, CAP_TS6) && HasID(client_p))
1140 sendto_one(target_p, ":%s SID %s 2 %s :%s%s",
1141 me.id, client_p->name, client_p->id,
1142 IsHidden(client_p) ? "(H) " : "",
1143 client_p->info);
1144 else
1145 sendto_one(target_p,":%s SERVER %s 2 :%s%s",
1146 me.name, client_p->name,
1147 IsHidden(client_p) ? "(H) " : "",
1148 client_p->info);
1149 }
1150
1151 /* Pass on my client information to the new server
1152 **
1153 ** First, pass only servers (idea is that if the link gets
1154 ** cancelled beacause the server was already there,
1155 ** there are no NICK's to be cancelled...). Of course,
1156 ** if cancellation occurs, all this info is sent anyway,
1157 ** and I guess the link dies when a read is attempted...? --msa
1158 **
1159 ** Note: Link cancellation to occur at this point means
1160 ** that at least two servers from my fragment are building
1161 ** up connection this other fragment at the same time, it's
1162 ** a race condition, not the normal way of operation...
1163 **
1164 ** ALSO NOTE: using the get_client_name for server names--
1165 ** see previous *WARNING*!!! (Also, original inpath
1166 ** is destroyed...)
1167 */
1168
1169 DLINK_FOREACH_PREV(ptr, global_serv_list.tail)
1170 {
1171 target_p = ptr->data;
1172
1173 /* target_p->from == target_p for target_p == client_p */
1174 if (IsMe(target_p) || target_p->from == client_p)
1175 continue;
1176
1177 if (IsCapable(client_p, CAP_TS6))
1178 {
1179 if (HasID(target_p))
1180 sendto_one(client_p, ":%s SID %s %d %s :%s%s",
1181 ID(target_p->servptr), target_p->name, target_p->hopcount+1,
1182 target_p->id, IsHidden(target_p) ? "(H) " : "",
1183 target_p->info);
1184 else /* introducing non-ts6 server */
1185 sendto_one(client_p, ":%s SERVER %s %d :%s%s",
1186 ID(target_p->servptr), target_p->name, target_p->hopcount+1,
1187 IsHidden(target_p) ? "(H) " : "", target_p->info);
1188 }
1189 else
1190 sendto_one(client_p, ":%s SERVER %s %d :%s%s",
1191 target_p->servptr->name, target_p->name, target_p->hopcount+1,
1192 IsHidden(target_p) ? "(H) " : "", target_p->info);
1193 }
1194
1195 server_burst(client_p);
1196 }
1197
1198 static void
1199 start_io(struct Client *server)
1200 {
1201 struct LocalUser *lserver = server->localClient;
1202 int alloclen = 1;
1203 char *buf;
1204 dlink_node *ptr;
1205 struct dbuf_block *block;
1206
1207 /* calculate how many bytes to allocate */
1208 if (IsCapable(server, CAP_ZIP))
1209 alloclen += 6;
1210 #ifdef HAVE_LIBCRYPTO
1211 if (IsCapable(server, CAP_ENC))
1212 alloclen += 16 + lserver->in_cipher->keylen + lserver->out_cipher->keylen;
1213 #endif
1214 alloclen += dbuf_length(&lserver->buf_recvq);
1215 alloclen += dlink_list_length(&lserver->buf_recvq.blocks) * 3;
1216 alloclen += dbuf_length(&lserver->buf_sendq);
1217 alloclen += dlink_list_length(&lserver->buf_sendq.blocks) * 3;
1218
1219 /* initialize servlink control sendq */
1220 lserver->slinkq = buf = MyMalloc(alloclen);
1221 lserver->slinkq_ofs = 0;
1222 lserver->slinkq_len = alloclen;
1223
1224 if (IsCapable(server, CAP_ZIP))
1225 {
1226 /* ziplink */
1227 *buf++ = SLINKCMD_SET_ZIP_OUT_LEVEL;
1228 *buf++ = 0; /* | */
1229 *buf++ = 1; /* \ len is 1 */
1230 *buf++ = ConfigFileEntry.compression_level;
1231 *buf++ = SLINKCMD_START_ZIP_IN;
1232 *buf++ = SLINKCMD_START_ZIP_OUT;
1233 }
1234 #ifdef HAVE_LIBCRYPTO
1235 if (IsCapable(server, CAP_ENC))
1236 {
1237 /* Decryption settings */
1238 *buf++ = SLINKCMD_SET_CRYPT_IN_CIPHER;
1239 *buf++ = 0; /* / (upper 8-bits of len) */
1240 *buf++ = 1; /* \ cipher id is 1 byte (lower 8-bits of len) */
1241 *buf++ = lserver->in_cipher->cipherid;
1242 *buf++ = SLINKCMD_SET_CRYPT_IN_KEY;
1243 *buf++ = 0; /* keylen < 256 */
1244 *buf++ = lserver->in_cipher->keylen;
1245 memcpy(buf, lserver->in_key, lserver->in_cipher->keylen);
1246 buf += lserver->in_cipher->keylen;
1247 /* Encryption settings */
1248 *buf++ = SLINKCMD_SET_CRYPT_OUT_CIPHER;
1249 *buf++ = 0; /* / (upper 8-bits of len) */
1250 *buf++ = 1; /* \ cipher id is 1 byte (lower 8-bits of len) */
1251 *buf++ = lserver->out_cipher->cipherid;
1252 *buf++ = SLINKCMD_SET_CRYPT_OUT_KEY;
1253 *buf++ = 0; /* keylen < 256 */
1254 *buf++ = lserver->out_cipher->keylen;
1255 memcpy(buf, lserver->out_key, lserver->out_cipher->keylen);
1256 buf += lserver->out_cipher->keylen;
1257 *buf++ = SLINKCMD_START_CRYPT_IN;
1258 *buf++ = SLINKCMD_START_CRYPT_OUT;
1259 }
1260 #endif
1261
1262 /* pass the whole recvq to servlink */
1263 DLINK_FOREACH (ptr, lserver->buf_recvq.blocks.head)
1264 {
1265 block = ptr->data;
1266 *buf++ = SLINKCMD_INJECT_RECVQ;
1267 *buf++ = (block->size >> 8);
1268 *buf++ = (block->size & 0xff);
1269 memcpy(buf, &block->data[0], block->size);
1270 buf += block->size;
1271 }
1272
1273 dbuf_clear(&lserver->buf_recvq);
1274
1275 /* pass the whole sendq to servlink */
1276 DLINK_FOREACH (ptr, lserver->buf_sendq.blocks.head)
1277 {
1278 block = ptr->data;
1279 *buf++ = SLINKCMD_INJECT_SENDQ;
1280 *buf++ = (block->size >> 8);
1281 *buf++ = (block->size & 0xff);
1282 memcpy(buf, &block->data[0], block->size);
1283 buf += block->size;
1284 }
1285
1286 dbuf_clear(&lserver->buf_sendq);
1287
1288 /* start io */
1289 *buf++ = SLINKCMD_INIT;
1290
1291 /* schedule a write */
1292 send_queued_slink_write(server);
1293 }
1294
1295 /* fork_server()
1296 *
1297 * inputs - struct Client *server
1298 * output - success: 0 / failure: -1
1299 * side effect - fork, and exec SERVLINK to handle this connection
1300 */
1301 static int
1302 fork_server(struct Client *server)
1303 {
1304 #ifndef HAVE_SOCKETPAIR
1305 return -1;
1306 #else
1307 int i;
1308 int slink_fds[2][2];
1309 /* 0? - ctrl | 1? - data
1310 * ?0 - child | ?1 - parent */
1311
1312 if (socketpair(AF_UNIX, SOCK_STREAM, 0, slink_fds[0]) < 0)
1313 return -1;
1314 if (socketpair(AF_UNIX, SOCK_STREAM, 0, slink_fds[1]) < 0)
1315 goto free_ctrl_fds;
1316
1317 if ((i = fork()) < 0)
1318 {
1319 close(slink_fds[1][0]); close(slink_fds[1][1]);
1320 free_ctrl_fds:
1321 close(slink_fds[0][0]); close(slink_fds[0][1]);
1322 return -1;
1323 }
1324
1325 if (i == 0)
1326 {
1327 char fd_str[3][6]; /* store 3x sizeof("65535") */
1328 char *kid_argv[7];
1329
1330 #ifdef O_ASYNC
1331 fcntl(server->localClient->fd.fd, F_SETFL,
1332 fcntl(server->localClient->fd.fd, F_GETFL, 0) & ~O_ASYNC);
1333 #endif
1334 close_fds(&server->localClient->fd);
1335 close(slink_fds[0][1]);
1336 close(slink_fds[1][1]);
1337
1338 sprintf(fd_str[0], "%d", slink_fds[0][0]);
1339 sprintf(fd_str[1], "%d", slink_fds[1][0]);
1340 sprintf(fd_str[2], "%d", server->localClient->fd.fd);
1341
1342 kid_argv[0] = "-slink";
1343 kid_argv[1] = kid_argv[2] = fd_str[0]; /* ctrl */
1344 kid_argv[3] = kid_argv[4] = fd_str[1]; /* data */
1345 kid_argv[5] = fd_str[2]; /* network */
1346 kid_argv[6] = NULL;
1347
1348 execv(ConfigFileEntry.servlink_path, kid_argv);
1349
1350 _exit(1);
1351 }
1352
1353 /* close the network fd and the child ends of the pipes */
1354 fd_close(&server->localClient->fd);
1355 close(slink_fds[0][0]);
1356 close(slink_fds[1][0]);
1357
1358 execute_callback(setup_socket_cb, slink_fds[0][1]);
1359 execute_callback(setup_socket_cb, slink_fds[1][1]);
1360
1361 fd_open(&server->localClient->ctrlfd, slink_fds[0][1], 1, "slink ctrl");
1362 fd_open(&server->localClient->fd, slink_fds[1][1], 1, "slink data");
1363
1364 read_ctrl_packet(&server->localClient->ctrlfd, server);
1365 read_packet(&server->localClient->fd, server);
1366
1367 return 0;
1368 #endif
1369 }
1370
1371 /* server_burst()
1372 *
1373 * inputs - struct Client pointer server
1374 * -
1375 * output - none
1376 * side effects - send a server burst
1377 * bugs - still too long
1378 */
1379 static void
1380 server_burst(struct Client *client_p)
1381 {
1382 /* Send it in the shortened format with the TS, if
1383 ** it's a TS server; walk the list of channels, sending
1384 ** all the nicks that haven't been sent yet for each
1385 ** channel, then send the channel itself -- it's less
1386 ** obvious than sending all nicks first, but on the
1387 ** receiving side memory will be allocated more nicely
1388 ** saving a few seconds in the handling of a split
1389 ** -orabidoo
1390 */
1391
1392 burst_all(client_p);
1393
1394 /* EOB stuff is now in burst_all */
1395 /* Always send a PING after connect burst is done */
1396 sendto_one(client_p, "PING :%s", ID_or_name(&me, client_p));
1397 }
1398
1399 /* burst_all()
1400 *
1401 * inputs - pointer to server to send burst to
1402 * output - NONE
1403 * side effects - complete burst of channels/nicks is sent to client_p
1404 */
1405 static void
1406 burst_all(struct Client *client_p)
1407 {
1408 dlink_node *ptr = NULL;
1409
1410 DLINK_FOREACH(ptr, global_channel_list.head)
1411 {
1412 struct Channel *chptr = ptr->data;
1413
1414 if (dlink_list_length(&chptr->members) != 0)
1415 {
1416 burst_members(client_p, chptr);
1417 send_channel_modes(client_p, chptr);
1418
1419 if (IsCapable(client_p, CAP_TBURST) ||
1420 IsCapable(client_p, CAP_TB))
1421 send_tb(client_p, chptr);
1422 }
1423 }
1424
1425 /* also send out those that are not on any channel
1426 */
1427 DLINK_FOREACH(ptr, global_client_list.head)
1428 {
1429 struct Client *target_p = ptr->data;
1430
1431 if (!IsBursted(target_p) && target_p->from != client_p)
1432 sendnick_TS(client_p, target_p);
1433
1434 ClearBursted(target_p);
1435 }
1436
1437 /* We send the time we started the burst, and let the remote host determine an EOB time,
1438 ** as otherwise we end up sending a EOB of 0 Sending here means it gets sent last -- fl
1439 */
1440 /* Its simpler to just send EOB and use the time its been connected.. --fl_ */
1441 if (IsCapable(client_p, CAP_EOB))
1442 sendto_one(client_p, ":%s EOB", ID_or_name(&me, client_p));
1443 }
1444
1445 /*
1446 * send_tb
1447 *
1448 * inputs - pointer to Client
1449 * - pointer to channel
1450 * output - NONE
1451 * side effects - Called on a server burst when
1452 * server is CAP_TB|CAP_TBURST capable
1453 */
1454 static void
1455 send_tb(struct Client *client_p, struct Channel *chptr)
1456 {
1457 /*
1458 * We may also send an empty topic here, but only if topic_time isn't 0,
1459 * i.e. if we had a topic that got unset. This is required for syncing
1460 * topics properly.
1461 *
1462 * Imagine the following scenario: Our downlink introduces a channel
1463 * to us with a TS that is equal to ours, but the channel topic on
1464 * their side got unset while the servers were in splitmode, which means
1465 * their 'topic' is newer. They simply wanted to unset it, so we have to
1466 * deal with it in a more sophisticated fashion instead of just resetting
1467 * it to their old topic they had before. Read m_tburst.c:ms_tburst
1468 * for further information -Michael
1469 */
1470 if (chptr->topic_time != 0)
1471 {
1472 if (IsCapable(client_p, CAP_TBURST))
1473 sendto_one(client_p, ":%s TBURST %lu %s %lu %s :%s",
1474 me.name, (unsigned long)chptr->channelts, chptr->chname,
1475 (unsigned long)chptr->topic_time,
1476 chptr->topic_info ? chptr->topic_info : "",
1477 chptr->topic ? chptr->topic : "");
1478 else if (IsCapable(client_p, CAP_TB))
1479 {
1480 if (ConfigChannel.burst_topicwho)
1481 {
1482 sendto_one(client_p, ":%s TB %s %lu %s :%s",
1483 me.name, chptr->chname,
1484 (unsigned long)chptr->topic_time,
1485 chptr->topic_info, chptr->topic ? chptr->topic : "");
1486 }
1487 else
1488 {
1489 sendto_one(client_p, ":%s TB %s %lu :%s",
1490 me.name, chptr->chname,
1491 (unsigned long)chptr->topic_time,
1492 chptr->topic ? chptr->topic : "");
1493 }
1494 }
1495 }
1496 }
1497
1498 /* burst_members()
1499 *
1500 * inputs - pointer to server to send members to
1501 * - dlink_list pointer to membership list to send
1502 * output - NONE
1503 * side effects -
1504 */
1505 static void
1506 burst_members(struct Client *client_p, struct Channel *chptr)
1507 {
1508 struct Client *target_p;
1509 struct Membership *ms;
1510 dlink_node *ptr;
1511
1512 DLINK_FOREACH(ptr, chptr->members.head)
1513 {
1514 ms = ptr->data;
1515 target_p = ms->client_p;
1516
1517 if (!IsBursted(target_p))
1518 {
1519 SetBursted(target_p);
1520
1521 if (target_p->from != client_p)
1522 sendnick_TS(client_p, target_p);
1523 }
1524 }
1525 }
1526
1527 /* New server connection code
1528 * Based upon the stuff floating about in s_bsd.c
1529 * -- adrian
1530 */
1531
1532 /* serv_connect() - initiate a server connection
1533 *
1534 * inputs - pointer to conf
1535 * - pointer to client doing the connect
1536 * output -
1537 * side effects -
1538 *
1539 * This code initiates a connection to a server. It first checks to make
1540 * sure the given server exists. If this is the case, it creates a socket,
1541 * creates a client, saves the socket information in the client, and
1542 * initiates a connection to the server through comm_connect_tcp(). The
1543 * completion of this goes through serv_completed_connection().
1544 *
1545 * We return 1 if the connection is attempted, since we don't know whether
1546 * it suceeded or not, and 0 if it fails in here somewhere.
1547 */
1548 int
1549 serv_connect(struct AccessItem *aconf, struct Client *by)
1550 {
1551 struct ConfItem *conf;
1552 struct Client *client_p;
1553 char buf[HOSTIPLEN];
1554
1555 /* conversion structs */
1556 struct sockaddr_in *v4;
1557 /* Make sure aconf is useful */
1558 assert(aconf != NULL);
1559
1560 if(aconf == NULL)
1561 return (0);
1562
1563 /* XXX should be passing struct ConfItem in the first place */
1564 conf = unmap_conf_item(aconf);
1565
1566 /* log */
1567 getnameinfo((struct sockaddr *)&aconf->ipnum, aconf->ipnum.ss_len,
1568 buf, sizeof(buf), NULL, 0, NI_NUMERICHOST);
1569 ilog(L_NOTICE, "Connect to %s[%s] @%s", aconf->user, aconf->host,
1570 buf);
1571
1572 /* Still processing a DNS lookup? -> exit */
1573 if (aconf->dns_pending)
1574 {
1575 sendto_realops_flags(UMODE_ALL, L_ALL,
1576 "Error connecting to %s: DNS lookup for connect{} in progress.",
1577 conf->name);
1578 return (0);
1579 }
1580
1581 if (aconf->dns_failed)
1582 {
1583 sendto_realops_flags(UMODE_ALL, L_ALL,
1584 "Error connecting to %s: DNS lookup for connect{} failed.",
1585 conf->name);
1586 return (0);
1587 }
1588
1589 /* Make sure this server isn't already connected
1590 * Note: aconf should ALWAYS be a valid C: line
1591 */
1592 if ((client_p = find_server(conf->name)) != NULL)
1593 {
1594 sendto_realops_flags(UMODE_ALL, L_ADMIN,
1595 "Server %s already present from %s",
1596 conf->name, get_client_name(client_p, SHOW_IP));
1597 sendto_realops_flags(UMODE_ALL, L_OPER,
1598 "Server %s already present from %s",
1599 conf->name, get_client_name(client_p, MASK_IP));
1600 if (by && IsClient(by) && !MyClient(by))
1601 sendto_one(by, ":%s NOTICE %s :Server %s already present from %s",
1602 me.name, by->name, conf->name,
1603 get_client_name(client_p, MASK_IP));
1604 return (0);
1605 }
1606
1607 /* Create a local client */
1608 client_p = make_client(NULL);
1609
1610 /* Copy in the server, hostname, fd */
1611 strlcpy(client_p->name, conf->name, sizeof(client_p->name));
1612 strlcpy(client_p->host, aconf->host, sizeof(client_p->host));
1613
1614 /* We already converted the ip once, so lets use it - stu */
1615 strlcpy(client_p->sockhost, buf, sizeof(client_p->sockhost));
1616
1617 /* create a socket for the server connection */
1618 if (comm_open(&client_p->localClient->fd, aconf->ipnum.ss.ss_family,
1619 SOCK_STREAM, 0, NULL) < 0)
1620 {
1621 /* Eek, failure to create the socket */
1622 report_error(L_ALL,
1623 "opening stream socket to %s: %s", conf->name, errno);
1624 SetDead(client_p);
1625 exit_client(client_p, &me, "Connection failed");
1626 return (0);
1627 }
1628
1629 /* servernames are always guaranteed under HOSTLEN chars */
1630 fd_note(&client_p->localClient->fd, "Server: %s", conf->name);
1631
1632 /* Attach config entries to client here rather than in
1633 * serv_connect_callback(). This to avoid null pointer references.
1634 */
1635 if (!attach_connect_block(client_p, conf->name, aconf->host))
1636 {
1637 sendto_realops_flags(UMODE_ALL, L_ALL,
1638 "Host %s is not enabled for connecting:no C/N-line",
1639 conf->name);
1640 if (by && IsClient(by) && !MyClient(by))
1641 sendto_one(by, ":%s NOTICE %s :Connect to host %s failed.",
1642 me.name, by->name, client_p->name);
1643 SetDead(client_p);
1644 exit_client(client_p, client_p, "Connection failed");
1645 return (0);
1646 }
1647
1648 /* at this point we have a connection in progress and C/N lines
1649 * attached to the client, the socket info should be saved in the
1650 * client and it should either be resolved or have a valid address.
1651 *
1652 * The socket has been connected or connect is in progress.
1653 */
1654 make_server(client_p);
1655
1656 if (by && IsClient(by))
1657 strlcpy(client_p->serv->by, by->name, sizeof(client_p->serv->by));
1658 else
1659 strlcpy(client_p->serv->by, "AutoConn.", sizeof(client_p->serv->by));
1660
1661 SetConnecting(client_p);
1662 dlinkAdd(client_p, &client_p->node, &global_client_list);
1663 /* from def_fam */
1664 client_p->localClient->aftype = aconf->aftype;
1665
1666 /* Now, initiate the connection */
1667 /* XXX assume that a non 0 type means a specific bind address
1668 * for this connect.
1669 */
1670 switch (aconf->aftype)
1671 {
1672 case AF_INET:
1673 v4 = (struct sockaddr_in*)&aconf->my_ipnum;
1674 if (v4->sin_addr.s_addr != 0)
1675 {
1676 struct irc_ssaddr ipn;
1677 memset(&ipn, 0, sizeof(struct irc_ssaddr));
1678 ipn.ss.ss_family = AF_INET;
1679 ipn.ss_port = 0;
1680 memcpy(&ipn, &aconf->my_ipnum, sizeof(struct irc_ssaddr));
1681 comm_connect_tcp(&client_p->localClient->fd, aconf->host, aconf->port,
1682 (struct sockaddr *)&ipn, ipn.ss_len,
1683 serv_connect_callback, client_p, aconf->aftype,
1684 CONNECTTIMEOUT);
1685 }
1686 else if (ServerInfo.specific_ipv4_vhost)
1687 {
1688 struct irc_ssaddr ipn;
1689 memset(&ipn, 0, sizeof(struct irc_ssaddr));
1690 ipn.ss.ss_family = AF_INET;
1691 ipn.ss_port = 0;
1692 memcpy(&ipn, &ServerInfo.ip, sizeof(struct irc_ssaddr));
1693 comm_connect_tcp(&client_p->localClient->fd, aconf->host, aconf->port,
1694 (struct sockaddr *)&ipn, ipn.ss_len,
1695 serv_connect_callback, client_p, aconf->aftype,
1696 CONNECTTIMEOUT);
1697 }
1698 else
1699 comm_connect_tcp(&client_p->localClient->fd, aconf->host, aconf->port,
1700 NULL, 0, serv_connect_callback, client_p, aconf->aftype,
1701 CONNECTTIMEOUT);
1702 break;
1703 #ifdef IPV6
1704 case AF_INET6:
1705 {
1706 struct irc_ssaddr ipn;
1707 struct sockaddr_in6 *v6;
1708 struct sockaddr_in6 *v6conf;
1709
1710 memset(&ipn, 0, sizeof(struct irc_ssaddr));
1711 v6conf = (struct sockaddr_in6 *)&aconf->my_ipnum;
1712 v6 = (struct sockaddr_in6 *)&ipn;
1713
1714 if (memcmp(&v6conf->sin6_addr, &v6->sin6_addr,
1715 sizeof(struct in6_addr)) != 0)
1716 {
1717 memcpy(&ipn, &aconf->my_ipnum, sizeof(struct irc_ssaddr));
1718 ipn.ss.ss_family = AF_INET6;
1719 ipn.ss_port = 0;
1720 comm_connect_tcp(&client_p->localClient->fd,
1721 aconf->host, aconf->port,
1722 (struct sockaddr *)&ipn, ipn.ss_len,
1723 serv_connect_callback, client_p,
1724 aconf->aftype, CONNECTTIMEOUT);
1725 }
1726 else if (ServerInfo.specific_ipv6_vhost)
1727 {
1728 memcpy(&ipn, &ServerInfo.ip6, sizeof(struct irc_ssaddr));
1729 ipn.ss.ss_family = AF_INET6;
1730 ipn.ss_port = 0;
1731 comm_connect_tcp(&client_p->localClient->fd,
1732 aconf->host, aconf->port,
1733 (struct sockaddr *)&ipn, ipn.ss_len,
1734 serv_connect_callback, client_p,
1735 aconf->aftype, CONNECTTIMEOUT);
1736 }
1737 else
1738 comm_connect_tcp(&client_p->localClient->fd,
1739 aconf->host, aconf->port,
1740 NULL, 0, serv_connect_callback, client_p,
1741 aconf->aftype, CONNECTTIMEOUT);
1742 }
1743 #endif
1744 }
1745 return (1);
1746 }
1747
1748 /* serv_connect_callback() - complete a server connection.
1749 *
1750 * This routine is called after the server connection attempt has
1751 * completed. If unsucessful, an error is sent to ops and the client
1752 * is closed. If sucessful, it goes through the initialisation/check
1753 * procedures, the capabilities are sent, and the socket is then
1754 * marked for reading.
1755 */
1756 static void
1757 serv_connect_callback(fde_t *fd, int status, void *data)
1758 {
1759 struct Client *client_p = data;
1760 struct ConfItem *conf=NULL;
1761 struct AccessItem *aconf=NULL;
1762
1763 /* First, make sure its a real client! */
1764 assert(client_p != NULL);
1765 assert(&client_p->localClient->fd == fd);
1766
1767 /* Next, for backward purposes, record the ip of the server */
1768 memcpy(&client_p->localClient->ip, &fd->connect.hostaddr,
1769 sizeof(struct irc_ssaddr));
1770 /* Check the status */
1771 if (status != COMM_OK)
1772 {
1773 /* We have an error, so report it and quit
1774 * Admins get to see any IP, mere opers don't *sigh*
1775 */
1776 if (ConfigServerHide.hide_server_ips)
1777 sendto_realops_flags(UMODE_ALL, L_ADMIN,
1778 "Error connecting to %s: %s",
1779 client_p->name, comm_errstr(status));
1780 else
1781 sendto_realops_flags(UMODE_ALL, L_ADMIN,
1782 "Error connecting to %s[%s]: %s", client_p->name,
1783 client_p->host, comm_errstr(status));
1784
1785 sendto_realops_flags(UMODE_ALL, L_OPER,
1786 "Error connecting to %s: %s",
1787 client_p->name, comm_errstr(status));
1788
1789 /* If a fd goes bad, call dead_link() the socket is no
1790 * longer valid for reading or writing.
1791 */
1792 dead_link_on_write(client_p, 0);
1793 return;
1794 }
1795
1796 /* COMM_OK, so continue the connection procedure */
1797 /* Get the C/N lines */
1798 conf = find_conf_name(&client_p->localClient->confs,
1799 client_p->name, SERVER_TYPE);
1800 if (conf == NULL)
1801 {
1802 sendto_realops_flags(UMODE_ALL, L_ADMIN,
1803 "Lost connect{} block for %s", get_client_name(client_p, HIDE_IP));
1804 sendto_realops_flags(UMODE_ALL, L_OPER,
1805 "Lost connect{} block for %s", get_client_name(client_p, MASK_IP));
1806
1807 exit_client(client_p, &me, "Lost connect{} block");
1808 return;
1809 }
1810
1811 aconf = (struct AccessItem *)map_to_conf(conf);
1812 /* Next, send the initial handshake */
1813 SetHandshake(client_p);
1814
1815 #ifdef HAVE_LIBCRYPTO
1816 /* Handle all CRYPTLINK links in cryptlink_init */
1817 if (IsConfCryptLink(aconf))
1818 {
1819 cryptlink_init(client_p, conf, fd);
1820 return;
1821 }
1822 #endif
1823
1824 /* jdc -- Check and send spasswd, not passwd. */
1825 if (!EmptyString(aconf->spasswd))
1826 /* Send TS 6 form only if id */
1827 sendto_one(client_p, "PASS %s TS %d %s",
1828 aconf->spasswd, TS_CURRENT, me.id);
1829
1830 /* Pass my info to the new server
1831 *
1832 * Pass on ZIP if supported
1833 * Pass on TB if supported.
1834 * - Dianora
1835 */
1836 send_capabilities(client_p, aconf,
1837 (IsConfCompressed(aconf) ? CAP_ZIP : 0)
1838 | (IsConfTopicBurst(aconf) ? CAP_TBURST|CAP_TB : 0), 0);
1839
1840 sendto_one(client_p, "SERVER %s 1 :%s%s",
1841 me.name, ConfigServerHide.hidden ? "(H) " : "",
1842 me.info);
1843
1844 /* If we've been marked dead because a send failed, just exit
1845 * here now and save everyone the trouble of us ever existing.
1846 */
1847 if (IsDead(client_p))
1848 {
1849 sendto_realops_flags(UMODE_ALL, L_ADMIN,
1850 "%s[%s] went dead during handshake",
1851 client_p->name,
1852 client_p->host);
1853 sendto_realops_flags(UMODE_ALL, L_OPER,
1854 "%s went dead during handshake", client_p->name);
1855 return;
1856 }
1857
1858 /* don't move to serv_list yet -- we haven't sent a burst! */
1859 /* If we get here, we're ok, so lets start reading some data */
1860 comm_setselect(fd, COMM_SELECT_READ, read_packet, client_p, 0);
1861 }
1862
1863 struct Client *
1864 find_servconn_in_progress(const char *name)
1865 {
1866 dlink_node *ptr;
1867 struct Client *cptr;
1868
1869 DLINK_FOREACH(ptr, unknown_list.head)
1870 {
1871 cptr = ptr->data;
1872
1873 if (cptr && cptr->name[0])
1874 if (match(name, cptr->name))
1875 return cptr;
1876 }
1877
1878 return NULL;
1879 }
1880
1881 #ifdef HAVE_LIBCRYPTO
1882 /*
1883 * sends a CRYPTLINK SERV command.
1884 */
1885 void
1886 cryptlink_init(struct Client *client_p, struct ConfItem *conf, fde_t *fd)
1887 {
1888 struct AccessItem *aconf;
1889 char *encrypted;
1890 unsigned char *key_to_send;
1891 char randkey[CIPHERKEYLEN];
1892 int enc_len;
1893
1894 /* get key */
1895 if ((!ServerInfo.rsa_private_key) ||
1896 (!RSA_check_key(ServerInfo.rsa_private_key)) )
1897 {
1898 cryptlink_error(client_p, "SERV", "Invalid RSA private key",
1899 "Invalid RSA private key");
1900 return;
1901 }
1902
1903 aconf = (struct AccessItem *)map_to_conf(conf);
1904
1905 if (aconf->rsa_public_key == NULL)
1906 {
1907 cryptlink_error(client_p, "SERV", "Invalid RSA public key",
1908 "Invalid RSA public key");
1909 return;
1910 }
1911
1912 if (get_randomness((unsigned char *)randkey, CIPHERKEYLEN) != 1)
1913 {
1914 cryptlink_error(client_p, "SERV", "Couldn't generate keyphrase",
1915 "Couldn't generate keyphrase");
1916 return;
1917 }
1918
1919 encrypted = MyMalloc(RSA_size(ServerInfo.rsa_private_key));
1920 enc_len = RSA_public_encrypt(CIPHERKEYLEN,
1921 (unsigned char *)randkey,
1922 (unsigned char *)encrypted,
1923 aconf->rsa_public_key,
1924 RSA_PKCS1_PADDING);
1925
1926 memcpy(client_p->localClient->in_key, randkey, CIPHERKEYLEN);
1927
1928 if (enc_len <= 0)
1929 {
1930 report_crypto_errors();
1931 MyFree(encrypted);
1932 cryptlink_error(client_p, "SERV", "Couldn't encrypt data",
1933 "Couldn't encrypt data");
1934 return;
1935 }
1936
1937 if (!(base64_block(&key_to_send, encrypted, enc_len)))
1938 {
1939 MyFree(encrypted);
1940 cryptlink_error(client_p, "SERV", "Couldn't base64 encode key",
1941 "Couldn't base64 encode key");
1942 return;
1943 }
1944
1945 send_capabilities(client_p, aconf,
1946 (IsConfCompressed(aconf) ? CAP_ZIP : 0)
1947 | (IsConfTopicBurst(aconf) ? CAP_TBURST|CAP_TB : 0), CAP_ENC_MASK);
1948
1949 sendto_one(client_p, "PASS . TS %d %s", TS_CURRENT, me.id);
1950 sendto_one(client_p, "CRYPTLINK SERV %s %s :%s%s",
1951 me.name, key_to_send,
1952 ConfigServerHide.hidden ? "(H) " : "", me.info);
1953
1954 SetHandshake(client_p);
1955 SetWaitAuth(client_p);
1956
1957 MyFree(encrypted);
1958 MyFree(key_to_send);
1959
1960 if (IsDead(client_p))
1961 cryptlink_error(client_p, "SERV", "Went dead during handshake",
1962 "Went dead during handshake");
1963 else if (fd != NULL)
1964 /* If we get here, we're ok, so lets start reading some data */
1965 comm_setselect(fd, COMM_SELECT_READ, read_packet, client_p, 0);
1966 }
1967
1968 void
1969 cryptlink_error(struct Client *client_p, const char *type,
1970 const char *reason, const char *client_reason)
1971 {
1972 sendto_realops_flags(UMODE_ALL, L_ADMIN, "%s: CRYPTLINK %s error - %s",
1973 get_client_name(client_p, SHOW_IP), type, reason);
1974 sendto_realops_flags(UMODE_ALL, L_OPER, "%s: CRYPTLINK %s error - %s",
1975 get_client_name(client_p, MASK_IP), type, reason);
1976 ilog(L_ERROR, "%s: CRYPTLINK %s error - %s",
1977 get_client_name(client_p, SHOW_IP), type, reason);
1978
1979 /* If client_reason isn't NULL, then exit the client with the message
1980 * defined in the call.
1981 */
1982 if ((client_reason != NULL) && (!IsDead(client_p)))
1983 exit_client(client_p, &me, client_reason);
1984 }
1985
1986 static char base64_chars[] =
1987 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
1988
1989 static char base64_values[] =
1990 {
1991 /* 00-15 */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
1992 /* 16-31 */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
1993 /* 32-47 */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63,
1994 /* 48-63 */ 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, 0, -1, -1,
1995 /* 64-79 */ -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
1996 /* 80-95 */ 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1,
1997 /* 96-111 */ -1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
1998 /* 112-127 */ 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1,
1999 /* 128-143 */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
2000 /* 144-159 */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
2001 /* 160-175 */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
2002 /* 186-191 */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
2003 /* 192-207 */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
2004 /* 208-223 */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
2005 /* 224-239 */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
2006 /* 240-255 */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1
2007 };
2008
2009 /*
2010 * base64_block will allocate and return a new block of memory
2011 * using MyMalloc(). It should be freed after use.
2012 */
2013 int
2014 base64_block(unsigned char **output, char *data, int len)
2015 {
2016 unsigned char *out;
2017 unsigned char *in = (unsigned char*)data;
2018 unsigned long int q_in;
2019 int i;
2020 int count = 0;
2021
2022 out = MyMalloc(((((len + 2) - ((len + 2) % 3)) / 3) * 4) + 1);
2023
2024 /* process 24 bits at a time */
2025 for( i = 0; i < len; i += 3)
2026 {
2027 q_in = 0;
2028
2029 if ( i + 2 < len )
2030 {
2031 q_in = (in[i+2] & 0xc0) << 2;
2032 q_in |= in[i+2];
2033 }
2034
2035 if ( i + 1 < len )
2036 {
2037 q_in |= (in[i+1] & 0x0f) << 10;
2038 q_in |= (in[i+1] & 0xf0) << 12;
2039 }
2040
2041 q_in |= (in[i] & 0x03) << 20;
2042 q_in |= in[i] << 22;
2043
2044 q_in &= 0x3f3f3f3f;
2045
2046 out[count++] = base64_chars[((q_in >> 24) )];
2047 out[count++] = base64_chars[((q_in >> 16) & 0xff)];
2048 out[count++] = base64_chars[((q_in >> 8) & 0xff)];
2049 out[count++] = base64_chars[((q_in ) & 0xff)];
2050 }
2051 if ( (i - len) > 0 )
2052 {
2053 out[count-1] = '=';
2054 if ( (i - len) > 1 )
2055 out[count-2] = '=';
2056 }
2057
2058 out[count] = '\0';
2059 *output = out;
2060 return (count);
2061 }
2062
2063 /*
2064 * unbase64_block will allocate and return a new block of memory
2065 * using MyMalloc(). It should be freed after use.
2066 */
2067 int
2068 unbase64_block(unsigned char **output, char *data, int len)
2069 {
2070 unsigned char *out;
2071 unsigned char *in = (unsigned char*)data;
2072 unsigned long int q_in;
2073 int i;
2074 int count = 0;
2075
2076 if ((len % 4) != 0)
2077 return (0);
2078
2079 out = MyMalloc(((len / 4) * 3) + 1);
2080
2081 /* process 32 bits at a time */
2082 for( i = 0; (i + 3) < len; i+=4)
2083 {
2084 /* compress input (chars a, b, c and d) as follows:
2085 * (after converting ascii -> base64 value)
2086 *
2087 * |00000000aaaaaabbbbbbccccccdddddd|
2088 * | 765432 107654 321076 543210|
2089 */
2090
2091 q_in = 0;
2092
2093 if (base64_values[in[i+3]] > -1)
2094 q_in |= base64_values[in[i+3]] ;
2095 if (base64_values[in[i+2]] > -1)
2096 q_in |= base64_values[in[i+2]] << 6;
2097 if (base64_values[in[i+1]] > -1)
2098 q_in |= base64_values[in[i+1]] << 12;
2099 if (base64_values[in[i ]] > -1)
2100 q_in |= base64_values[in[i ]] << 18;
2101
2102 out[count++] = (q_in >> 16) & 0xff;
2103 out[count++] = (q_in >> 8) & 0xff;
2104 out[count++] = (q_in ) & 0xff;
2105 }
2106
2107 if (in[i-1] == '=') count--;
2108 if (in[i-2] == '=') count--;
2109
2110 out[count] = '\0';
2111 *output = out;
2112 return (count);
2113 }
2114
2115 #endif /* HAVE_LIBCRYPTO */
2116

Properties

Name Value
svn:eol-style native
svn:keywords Id Revision