ViewVC Help
View File | Revision Log | Show Annotations | View Changeset | Root Listing
root/svn/ircd-hybrid-7.2/src/s_serv.c
Revision: 889
Committed: Thu Nov 1 12:59:05 2007 UTC (16 years, 4 months ago) by michael
Content type: text/x-csrc
File size: 63679 byte(s)
Log Message:
- Got rid of Serv.dep_users and Serv.dep_servers

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 "tools.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 "inet_misc.h"
41 #include "sprintf_irc.h"
42 #include "ircd.h"
43 #include "ircd_defs.h"
44 #include "s_bsd.h"
45 #include "irc_getnameinfo.h"
46 #include "list.h"
47 #include "numeric.h"
48 #include "packet.h"
49 #include "irc_res.h"
50 #include "s_conf.h"
51 #include "s_serv.h"
52 #include "s_log.h"
53 #include "s_stats.h"
54 #include "s_user.h"
55 #include "send.h"
56 #include "memory.h"
57 #include "channel.h" /* chcap_usage_counts stuff...*/
58
59 #define MIN_CONN_FREQ 300
60
61 static dlink_list cap_list = { NULL, NULL, 0 };
62 static void server_burst(struct Client *);
63 static int fork_server(struct Client *);
64 static void burst_all(struct Client *);
65 static void send_tb(struct Client *client_p, struct Channel *chptr);
66
67 static CNCB serv_connect_callback;
68
69 static void start_io(struct Client *);
70 static void burst_members(struct Client *, struct Channel *);
71
72 static SlinkRplHnd slink_error;
73 static SlinkRplHnd slink_zipstats;
74
75
76 #ifdef HAVE_LIBCRYPTO
77 struct EncCapability CipherTable[] =
78 {
79 #ifdef HAVE_EVP_BF_CFB
80 { "BF/168", CAP_ENC_BF_168, 24, CIPHER_BF },
81 { "BF/128", CAP_ENC_BF_128, 16, CIPHER_BF },
82 #endif
83 #ifdef HAVE_EVP_CAST5_CFB
84 { "CAST/128", CAP_ENC_CAST_128, 16, CIPHER_CAST },
85 #endif
86 #ifdef HAVE_EVP_IDEA_CFB
87 { "IDEA/128", CAP_ENC_IDEA_128, 16, CIPHER_IDEA },
88 #endif
89 #ifdef HAVE_EVP_RC5_32_12_16_CFB
90 { "RC5.16/128", CAP_ENC_RC5_16_128, 16, CIPHER_RC5_16 },
91 { "RC5.12/128", CAP_ENC_RC5_12_128, 16, CIPHER_RC5_12 },
92 { "RC5.8/128", CAP_ENC_RC5_8_128, 16, CIPHER_RC5_8 },
93 #endif
94 #ifdef HAVE_EVP_DES_EDE3_CFB
95 { "3DES/168", CAP_ENC_3DES_168, 24, CIPHER_3DES },
96 #endif
97 #ifdef HAVE_EVP_DES_CFB
98 { "DES/56", CAP_ENC_DES_56, 8, CIPHER_DES },
99 #endif
100 { 0, 0, 0, 0 }
101 };
102 #endif
103
104 struct SlinkRplDef slinkrpltab[] = {
105 { SLINKRPL_ERROR, slink_error, SLINKRPL_FLAG_DATA },
106 { SLINKRPL_ZIPSTATS, slink_zipstats, SLINKRPL_FLAG_DATA },
107 { 0, 0, 0 },
108 };
109
110
111 void
112 slink_error(unsigned int rpl, unsigned int len, unsigned char *data,
113 struct Client *server_p)
114 {
115 assert(rpl == SLINKRPL_ERROR);
116 assert(len < 256);
117
118 data[len-1] = '\0';
119
120 sendto_realops_flags(UMODE_ALL, L_ALL, "SlinkError for %s: %s",
121 server_p->name, data);
122 /* XXX should this be exit_client? */
123 exit_client(server_p, &me, "servlink error -- terminating link");
124 }
125
126 void
127 slink_zipstats(unsigned int rpl, unsigned int len, unsigned char *data,
128 struct Client *server_p)
129 {
130 struct ZipStats zipstats;
131 unsigned long in = 0, in_wire = 0, out = 0, out_wire = 0;
132 int i = 0;
133
134 assert(rpl == SLINKRPL_ZIPSTATS);
135 assert(len == 16);
136 assert(IsCapable(server_p, CAP_ZIP));
137
138 /* Yes, it needs to be done this way, no we cannot let the compiler
139 * work with the pointer to the structure. This works around a GCC
140 * bug on SPARC that affects all versions at the time of this writing.
141 * I will feed you to the creatures living in RMS's beard if you do
142 * not leave this as is, without being sure that you are not causing
143 * regression for most of our installed SPARC base.
144 * -jmallett, 04/27/2002
145 */
146 memcpy(&zipstats, &server_p->localClient->zipstats, sizeof(struct ZipStats));
147
148 in |= (data[i++] << 24);
149 in |= (data[i++] << 16);
150 in |= (data[i++] << 8);
151 in |= (data[i++] );
152
153 in_wire |= (data[i++] << 24);
154 in_wire |= (data[i++] << 16);
155 in_wire |= (data[i++] << 8);
156 in_wire |= (data[i++] );
157
158 out |= (data[i++] << 24);
159 out |= (data[i++] << 16);
160 out |= (data[i++] << 8);
161 out |= (data[i++] );
162
163 out_wire |= (data[i++] << 24);
164 out_wire |= (data[i++] << 16);
165 out_wire |= (data[i++] << 8);
166 out_wire |= (data[i++] );
167
168 /* This macro adds b to a if a plus b is not an overflow, and sets the
169 * value of a to b if it is.
170 * Add and Set if No Overflow.
171 */
172 #define ASNO(a, b) a = (a + b >= a ? a + b : b)
173
174 ASNO(zipstats.in, in);
175 ASNO(zipstats.out, out);
176 ASNO(zipstats.in_wire, in_wire);
177 ASNO(zipstats.out_wire, out_wire);
178
179 if (zipstats.in > 0)
180 zipstats.in_ratio = (((double)(zipstats.in - zipstats.in_wire) /
181 (double)zipstats.in) * 100.00);
182 else
183 zipstats.in_ratio = 0;
184
185 if (zipstats.out > 0)
186 zipstats.out_ratio = (((double)(zipstats.out - zipstats.out_wire) /
187 (double)zipstats.out) * 100.00);
188 else
189 zipstats.out_ratio = 0;
190
191 memcpy(&server_p->localClient->zipstats, &zipstats, sizeof (struct ZipStats));
192 }
193
194 void
195 collect_zipstats(void *unused)
196 {
197 dlink_node *ptr;
198 struct Client *target_p;
199
200 DLINK_FOREACH(ptr, serv_list.head)
201 {
202 target_p = ptr->data;
203
204 if (IsCapable(target_p, CAP_ZIP))
205 {
206 /* only bother if we haven't already got something queued... */
207 if (!target_p->localClient->slinkq)
208 {
209 target_p->localClient->slinkq = MyMalloc(1); /* sigh.. */
210 target_p->localClient->slinkq[0] = SLINKCMD_ZIPSTATS;
211 target_p->localClient->slinkq_ofs = 0;
212 target_p->localClient->slinkq_len = 1;
213 send_queued_slink_write(target_p);
214 }
215 }
216 }
217 }
218
219 #ifdef HAVE_LIBCRYPTO
220 struct EncCapability *
221 check_cipher(struct Client *client_p, struct AccessItem *aconf)
222 {
223 struct EncCapability *epref = NULL;
224
225 /* Use connect{} specific info if available */
226 if (aconf->cipher_preference)
227 epref = aconf->cipher_preference;
228 else if (ConfigFileEntry.default_cipher_preference)
229 epref = ConfigFileEntry.default_cipher_preference;
230
231 /*
232 * If the server supports the capability in hand, return the matching
233 * conf struct. Otherwise, return NULL (an error).
234 */
235 if (epref && IsCapableEnc(client_p, epref->cap))
236 return epref;
237
238 return NULL;
239 }
240 #endif /* HAVE_LIBCRYPTO */
241
242 /* my_name_for_link()
243 * return wildcard name of my server name
244 * according to given config entry --Jto
245 */
246 const char *
247 my_name_for_link(struct ConfItem *conf)
248 {
249 struct AccessItem *aconf;
250
251 aconf = (struct AccessItem *)map_to_conf(conf);
252 if (aconf->fakename != NULL)
253 return aconf->fakename;
254 else
255 return me.name;
256 }
257
258 /*
259 * write_links_file
260 *
261 * inputs - void pointer which is not used
262 * output - NONE
263 * side effects - called from an event, write out list of linked servers
264 * but in no particular order.
265 */
266 void
267 write_links_file(void* notused)
268 {
269 MessageFileLine *next_mptr = 0;
270 MessageFileLine *mptr = 0;
271 MessageFileLine *currentMessageLine = 0;
272 MessageFileLine *newMessageLine = 0;
273 MessageFile *MessageFileptr;
274 const char *p;
275 FBFILE *file;
276 char buff[512];
277 dlink_node *ptr;
278
279 MessageFileptr = &ConfigFileEntry.linksfile;
280
281 if ((file = fbopen(MessageFileptr->fileName, "w")) == NULL)
282 return;
283
284 for (mptr = MessageFileptr->contentsOfFile; mptr; mptr = next_mptr)
285 {
286 next_mptr = mptr->next;
287 MyFree(mptr);
288 }
289
290 MessageFileptr->contentsOfFile = NULL;
291 currentMessageLine = NULL;
292
293 DLINK_FOREACH(ptr, global_serv_list.head)
294 {
295 size_t nbytes = 0;
296 struct Client *target_p = ptr->data;
297
298 /* skip ourselves, we send ourselves in /links */
299 if (IsMe(target_p))
300 continue;
301
302 /* skip hidden servers */
303 if (IsHidden(target_p) && !ConfigServerHide.disable_hidden)
304 continue;
305
306 if (target_p->info[0])
307 p = target_p->info;
308 else
309 p = "(Unknown Location)";
310
311 newMessageLine = MyMalloc(sizeof(MessageFileLine));
312
313 /* Attempt to format the file in such a way it follows the usual links output
314 * ie "servername uplink :hops info"
315 * Mostly for aesthetic reasons - makes it look pretty in mIRC ;)
316 * - madmax
317 */
318
319 /*
320 * For now, check this ircsprintf wont overflow - it shouldnt on a
321 * default config but it is configurable..
322 * This should be changed to an snprintf at some point, but I'm wanting to
323 * know if this is a cause of a bug - cryogen
324 */
325 assert(strlen(target_p->name) + strlen(me.name) + 6 + strlen(p) <=
326 MESSAGELINELEN);
327 ircsprintf(newMessageLine->line, "%s %s :1 %s",
328 target_p->name, me.name, p);
329 newMessageLine->next = NULL;
330
331 if (MessageFileptr->contentsOfFile)
332 {
333 if (currentMessageLine)
334 currentMessageLine->next = newMessageLine;
335 currentMessageLine = newMessageLine;
336 }
337 else
338 {
339 MessageFileptr->contentsOfFile = newMessageLine;
340 currentMessageLine = newMessageLine;
341 }
342
343 nbytes = ircsprintf(buff, "%s %s :1 %s\n", target_p->name, me.name, p);
344 fbputs(buff, file, nbytes);
345 }
346
347 fbclose(file);
348 }
349
350 /* hunt_server()
351 * Do the basic thing in delivering the message (command)
352 * across the relays to the specific server (server) for
353 * actions.
354 *
355 * Note: The command is a format string and *MUST* be
356 * of prefixed style (e.g. ":%s COMMAND %s ...").
357 * Command can have only max 8 parameters.
358 *
359 * server parv[server] is the parameter identifying the
360 * target server.
361 *
362 * *WARNING*
363 * parv[server] is replaced with the pointer to the
364 * real servername from the matched client (I'm lazy
365 * now --msa).
366 *
367 * returns: (see #defines)
368 */
369 int
370 hunt_server(struct Client *client_p, struct Client *source_p, const char *command,
371 int server, int parc, char *parv[])
372 {
373 struct Client *target_p = NULL;
374 struct Client *target_tmp = NULL;
375 dlink_node *ptr;
376 int wilds;
377
378 /* Assume it's me, if no server
379 */
380 if (parc <= server || EmptyString(parv[server]) ||
381 match(me.name, parv[server]) ||
382 match(parv[server], me.name) ||
383 !strcmp(parv[server], me.id))
384 return(HUNTED_ISME);
385
386 /* These are to pickup matches that would cause the following
387 * message to go in the wrong direction while doing quick fast
388 * non-matching lookups.
389 */
390 if (MyClient(source_p))
391 target_p = find_client(parv[server]);
392 else
393 target_p = find_person(client_p, parv[server]);
394
395 if (target_p)
396 if (target_p->from == source_p->from && !MyConnect(target_p))
397 target_p = NULL;
398
399 if (target_p == NULL && (target_p = find_server(parv[server])))
400 if (target_p->from == source_p->from && !MyConnect(target_p))
401 target_p = NULL;
402
403 collapse(parv[server]);
404 wilds = (strchr(parv[server], '?') || strchr(parv[server], '*'));
405
406 /* Again, if there are no wild cards involved in the server
407 * name, use the hash lookup
408 */
409 if (target_p == NULL)
410 {
411 if (!wilds)
412 {
413 if (!(target_p = find_server(parv[server])))
414 {
415 sendto_one(source_p, form_str(ERR_NOSUCHSERVER),
416 me.name, parv[0], parv[server]);
417 return(HUNTED_NOSUCH);
418 }
419 }
420 else
421 {
422 DLINK_FOREACH(ptr, global_client_list.head)
423 {
424 target_tmp = ptr->data;
425
426 if (match(parv[server], target_tmp->name))
427 {
428 if (target_tmp->from == source_p->from && !MyConnect(target_tmp))
429 continue;
430 target_p = ptr->data;
431
432 if (IsRegistered(target_p) && (target_p != client_p))
433 break;
434 }
435 }
436 }
437 }
438
439 if (target_p != NULL)
440 {
441 if(!IsRegistered(target_p))
442 {
443 sendto_one(source_p, form_str(ERR_NOSUCHSERVER),
444 me.name, parv[0], parv[server]);
445 return HUNTED_NOSUCH;
446 }
447
448 if (IsMe(target_p) || MyClient(target_p))
449 return HUNTED_ISME;
450
451 if (!match(target_p->name, parv[server]))
452 parv[server] = target_p->name;
453
454 /* This is a little kludgy but should work... */
455 if (IsClient(source_p) &&
456 ((MyConnect(target_p) && IsCapable(target_p, CAP_TS6)) ||
457 (!MyConnect(target_p) && IsCapable(target_p->from, CAP_TS6))))
458 parv[0] = ID(source_p);
459
460 sendto_one(target_p, command, parv[0],
461 parv[1], parv[2], parv[3], parv[4],
462 parv[5], parv[6], parv[7], parv[8]);
463 return(HUNTED_PASS);
464 }
465
466 sendto_one(source_p, form_str(ERR_NOSUCHSERVER),
467 me.name, parv[0], parv[server]);
468 return(HUNTED_NOSUCH);
469 }
470
471 /* try_connections()
472 *
473 * inputs - void pointer which is not used
474 * output - NONE
475 * side effects -
476 * scan through configuration and try new connections.
477 * Returns the calendar time when the next call to this
478 * function should be made latest. (No harm done if this
479 * is called earlier or later...)
480 */
481 void
482 try_connections(void *unused)
483 {
484 dlink_node *ptr;
485 struct ConfItem *conf;
486 struct AccessItem *aconf;
487 struct ClassItem *cltmp;
488 int confrq;
489
490 /* TODO: change this to set active flag to 0 when added to event! --Habeeb */
491 if (GlobalSetOptions.autoconn == 0)
492 return;
493
494 DLINK_FOREACH(ptr, server_items.head)
495 {
496 conf = ptr->data;
497 aconf = (struct AccessItem *)map_to_conf(conf);
498
499 /* Also when already connecting! (update holdtimes) --SRB
500 */
501 if (!(aconf->status & CONF_SERVER) || aconf->port <= 0 ||
502 !(IsConfAllowAutoConn(aconf)))
503 continue;
504
505 cltmp = (struct ClassItem *)map_to_conf(aconf->class_ptr);
506
507 /* Skip this entry if the use of it is still on hold until
508 * future. Otherwise handle this entry (and set it on hold
509 * until next time). Will reset only hold times, if already
510 * made one successfull connection... [this algorithm is
511 * a bit fuzzy... -- msa >;) ]
512 */
513 if (aconf->hold > CurrentTime)
514 continue;
515
516 if (cltmp == NULL)
517 confrq = DEFAULT_CONNECTFREQUENCY;
518 else
519 {
520 confrq = ConFreq(cltmp);
521 if (confrq < MIN_CONN_FREQ )
522 confrq = MIN_CONN_FREQ;
523 }
524
525 aconf->hold = CurrentTime + confrq;
526
527 /* Found a CONNECT config with port specified, scan clients
528 * and see if this server is already connected?
529 */
530 if (find_server(conf->name) != NULL)
531 continue;
532
533 if (CurrUserCount(cltmp) < MaxTotal(cltmp))
534 {
535 /* Go to the end of the list, if not already last */
536 if (ptr->next != NULL)
537 {
538 dlinkDelete(ptr, &server_items);
539 dlinkAddTail(conf, &conf->node, &server_items);
540 }
541
542 if (find_servconn_in_progress(conf->name))
543 return;
544
545 /* We used to only print this if serv_connect() actually
546 * succeeded, but since comm_tcp_connect() can call the callback
547 * immediately if there is an error, we were getting error messages
548 * in the wrong order. SO, we just print out the activated line,
549 * and let serv_connect() / serv_connect_callback() print an
550 * error afterwards if it fails.
551 * -- adrian
552 */
553 if (ConfigServerHide.hide_server_ips)
554 sendto_realops_flags(UMODE_ALL, L_ALL, "Connection to %s activated.",
555 conf->name);
556 else
557 sendto_realops_flags(UMODE_ALL, L_ALL, "Connection to %s[%s] activated.",
558 conf->name, aconf->host);
559
560 serv_connect(aconf, NULL);
561 /* We connect only one at time... */
562 return;
563 }
564 }
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 = (struct AccessItem *)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 /* Don't unset CAP_HUB here even if the server isn't a hub,
674 * it only indicates if the server thinks it's lazylinks are
675 * leafs or not.. if you unset it, bad things will happen
676 */
677 if (aconf != NULL)
678 {
679 struct sockaddr_in *v4;
680 #ifdef IPV6
681 struct sockaddr_in6 *v6;
682 #endif
683 switch (aconf->aftype)
684 {
685 #ifdef IPV6
686 case AF_INET6:
687 v6 = (struct sockaddr_in6 *)&aconf->ipnum;
688
689 if (IN6_IS_ADDR_UNSPECIFIED(&v6->sin6_addr))
690 memcpy(&aconf->ipnum, &client_p->localClient->ip, sizeof(struct irc_ssaddr));
691 break;
692 #endif
693 case AF_INET:
694 v4 = (struct sockaddr_in *)&aconf->ipnum;
695
696 if (v4->sin_addr.s_addr == INADDR_NONE)
697 memcpy(&aconf->ipnum, &client_p->localClient->ip, sizeof(struct irc_ssaddr));
698 break;
699 }
700 }
701
702 return(0);
703 }
704
705 /* add_capability()
706 *
707 * inputs - string name of CAPAB
708 * - int flag of capability
709 * output - NONE
710 * side effects - Adds given capability name and bit mask to
711 * current supported capabilities. This allows
712 * modules to dynamically add or subtract their capability.
713 */
714 void
715 add_capability(const char *capab_name, int cap_flag, int add_to_default)
716 {
717 struct Capability *cap = MyMalloc(sizeof(*cap));
718
719 DupString(cap->name, capab_name);
720 cap->cap = cap_flag;
721 dlinkAdd(cap, &cap->node, &cap_list);
722
723 if (add_to_default)
724 default_server_capabs |= cap_flag;
725 }
726
727 /* delete_capability()
728 *
729 * inputs - string name of CAPAB
730 * output - NONE
731 * side effects - delete given capability from ones known.
732 */
733 int
734 delete_capability(const char *capab_name)
735 {
736 dlink_node *ptr;
737 dlink_node *next_ptr;
738 struct Capability *cap;
739
740 DLINK_FOREACH_SAFE(ptr, next_ptr, cap_list.head)
741 {
742 cap = ptr->data;
743
744 if (cap->cap != 0)
745 {
746 if (irccmp(cap->name, capab_name) == 0)
747 {
748 default_server_capabs &= ~(cap->cap);
749 dlinkDelete(ptr, &cap_list);
750 MyFree(cap->name);
751 cap->name = NULL;
752 MyFree(cap);
753 }
754 }
755 }
756
757 return(0);
758 }
759
760 /*
761 * find_capability()
762 *
763 * inputs - string name of capab to find
764 * output - 0 if not found CAPAB otherwise
765 * side effects - none
766 */
767 int
768 find_capability(const char *capab)
769 {
770 dlink_node *ptr;
771 struct Capability *cap;
772
773 DLINK_FOREACH(ptr, cap_list.head)
774 {
775 cap = ptr->data;
776
777 if (cap->cap != 0)
778 {
779 if (irccmp(cap->name, capab) == 0)
780 return(cap->cap);
781 }
782 }
783 return(0);
784 }
785
786 /* send_capabilities()
787 *
788 * inputs - Client pointer to send to
789 * - Pointer to AccessItem (for crypt)
790 * - int flag of capabilities that this server can send
791 * - int flag of encryption capabilities
792 * output - NONE
793 * side effects - send the CAPAB line to a server -orabidoo
794 *
795 */
796 void
797 send_capabilities(struct Client *client_p, struct AccessItem *aconf,
798 int cap_can_send, int enc_can_send)
799 {
800 struct Capability *cap=NULL;
801 char msgbuf[IRCD_BUFSIZE];
802 char *t;
803 int tl;
804 dlink_node *ptr;
805 #ifdef HAVE_LIBCRYPTO
806 const struct EncCapability *epref = NULL;
807 char *capend;
808 int sent_cipher = 0;
809 #endif
810
811 t = msgbuf;
812
813 DLINK_FOREACH(ptr, cap_list.head)
814 {
815 cap = ptr->data;
816
817 if (cap->cap & (cap_can_send|default_server_capabs))
818 {
819 tl = ircsprintf(t, "%s ", cap->name);
820 t += tl;
821 }
822 }
823 #ifdef HAVE_LIBCRYPTO
824 if (enc_can_send)
825 {
826 capend = t;
827 strcpy(t, "ENC:");
828 t += 4;
829
830 /* use connect{} specific info if available */
831 if (aconf->cipher_preference)
832 epref = aconf->cipher_preference;
833 else if (ConfigFileEntry.default_cipher_preference)
834 epref = ConfigFileEntry.default_cipher_preference;
835
836 if (epref && (epref->cap & enc_can_send))
837 {
838 /* Leave the space -- it is removed later. */
839 tl = ircsprintf(t, "%s ", epref->name);
840 t += tl;
841 sent_cipher = 1;
842 }
843
844 if (!sent_cipher)
845 t = capend; /* truncate string before ENC:, below */
846 }
847 #endif
848 *(t - 1) = '\0';
849 sendto_one(client_p, "CAPAB :%s", msgbuf);
850 }
851
852 /* sendnick_TS()
853 *
854 * inputs - client (server) to send nick towards
855 * - client to send nick for
856 * output - NONE
857 * side effects - NICK message is sent towards given client_p
858 */
859 void
860 sendnick_TS(struct Client *client_p, struct Client *target_p)
861 {
862 static char ubuf[12];
863
864 if (!IsClient(target_p))
865 return;
866
867 send_umode(NULL, target_p, 0, IsOperHiddenAdmin(target_p) ?
868 SEND_UMODES & ~UMODE_ADMIN : SEND_UMODES, ubuf);
869
870 if (ubuf[0] == '\0')
871 {
872 ubuf[0] = '+';
873 ubuf[1] = '\0';
874 }
875
876 /* XXX Both of these need to have a :me.name or :mySID!?!?! */
877 if (HasID(target_p) && IsCapable(client_p, CAP_TS6))
878 sendto_one(client_p, ":%s UID %s %d %lu %s %s %s %s %s :%s",
879 target_p->servptr->id,
880 target_p->name, target_p->hopcount + 1,
881 (unsigned long) target_p->tsinfo,
882 ubuf, target_p->username, target_p->host,
883 (MyClient(target_p) && IsIPSpoof(target_p)) ?
884 "0" : target_p->sockhost, target_p->id, target_p->info);
885 else
886 sendto_one(client_p, "NICK %s %d %lu %s %s %s %s :%s",
887 target_p->name, target_p->hopcount + 1,
888 (unsigned long) target_p->tsinfo,
889 ubuf, target_p->username, target_p->host,
890 target_p->servptr->name, target_p->info);
891
892 if (IsConfAwayBurst((struct AccessItem *)map_to_conf(client_p->serv->sconf)))
893 if (!EmptyString(target_p->away))
894 sendto_one(client_p, ":%s AWAY :%s", target_p->name,
895 target_p->away);
896
897 }
898
899 /*
900 * show_capabilities - show current server capabilities
901 *
902 * inputs - pointer to a struct Client
903 * output - pointer to static string
904 * side effects - build up string representing capabilities of server listed
905 */
906 const char *
907 show_capabilities(struct Client *target_p)
908 {
909 static char msgbuf[IRCD_BUFSIZE];
910 char *t = msgbuf;
911 dlink_node *ptr;
912
913 t += ircsprintf(msgbuf, "TS ");
914
915 DLINK_FOREACH(ptr, cap_list.head)
916 {
917 const struct Capability *cap = ptr->data;
918
919 if (IsCapable(target_p, cap->cap))
920 t += ircsprintf(t, "%s ", cap->name);
921 }
922 #ifdef HAVE_LIBCRYPTO
923 if (IsCapable(target_p, CAP_ENC) &&
924 target_p->localClient->in_cipher &&
925 target_p->localClient->out_cipher)
926 t += ircsprintf(t, "ENC:%s ",
927 target_p->localClient->in_cipher->name);
928 #endif
929 *(t - 1) = '\0';
930
931 return(msgbuf);
932 }
933
934 /* make_server()
935 *
936 * inputs - pointer to client struct
937 * output - pointer to struct Server
938 * side effects - add's an Server information block to a client
939 * if it was not previously allocated.
940 */
941 struct Server *
942 make_server(struct Client *client_p)
943 {
944 if (client_p->serv == NULL)
945 client_p->serv = MyMalloc(sizeof(struct Server));
946
947 return client_p->serv;
948 }
949
950 /* server_estab()
951 *
952 * inputs - pointer to a struct Client
953 * output -
954 * side effects -
955 */
956 void
957 server_estab(struct Client *client_p)
958 {
959 struct Client *target_p;
960 struct ConfItem *conf;
961 struct AccessItem *aconf=NULL;
962 char *host;
963 const char *inpath;
964 static char inpath_ip[HOSTLEN * 2 + USERLEN + 6];
965 dlink_node *m;
966 dlink_node *ptr;
967
968 assert(client_p != NULL);
969
970 strlcpy(inpath_ip, get_client_name(client_p, SHOW_IP), sizeof(inpath_ip));
971
972 inpath = get_client_name(client_p, MASK_IP); /* "refresh" inpath with host */
973 host = client_p->name;
974
975 if ((conf = find_conf_name(&client_p->localClient->confs, host, SERVER_TYPE))
976 == NULL)
977 {
978 /* This shouldn't happen, better tell the ops... -A1kmm */
979 sendto_realops_flags(UMODE_ALL, L_ALL, "Warning: Lost connect{} block "
980 "for server %s(this shouldn't happen)!", host);
981 exit_client(client_p, &me, "Lost connect{} block!");
982 return;
983 }
984
985 MyFree(client_p->localClient->passwd);
986 client_p->localClient->passwd = NULL;
987
988 /* Its got identd, since its a server */
989 SetGotId(client_p);
990
991 /* If there is something in the serv_list, it might be this
992 * connecting server..
993 */
994 if (!ServerInfo.hub && serv_list.head)
995 {
996 if (client_p != serv_list.head->data || serv_list.head->next)
997 {
998 ServerStats->is_ref++;
999 sendto_one(client_p, "ERROR :I'm a leaf not a hub");
1000 exit_client(client_p, &me, "I'm a leaf");
1001 return;
1002 }
1003 }
1004
1005 aconf = (struct AccessItem *)map_to_conf(conf);
1006
1007 if (IsUnknown(client_p) && !IsConfCryptLink(aconf))
1008 {
1009 /* jdc -- 1. Use EmptyString(), not [0] index reference.
1010 * 2. Check aconf->spasswd, not aconf->passwd.
1011 */
1012 if (!EmptyString(aconf->spasswd))
1013 {
1014 /* only send ts6 format PASS if we have ts6 enabled */
1015 if (me.id[0] != '\0') /* Send TS 6 form only if id */
1016 sendto_one(client_p, "PASS %s TS %d %s",
1017 aconf->spasswd, TS_CURRENT, me.id);
1018 else
1019 sendto_one(client_p, "PASS %s TS 5",
1020 aconf->spasswd);
1021 }
1022
1023 /* Pass my info to the new server
1024 *
1025 * If this is a HUB, pass on CAP_HUB
1026 * Pass on ZIP if supported
1027 * Pass on TB if supported.
1028 * - Dianora
1029 */
1030
1031 send_capabilities(client_p, aconf, (ServerInfo.hub ? CAP_HUB : 0)
1032 | (IsConfCompressed(aconf) ? CAP_ZIP : 0)
1033 | (IsConfTopicBurst(aconf) ? CAP_TBURST|CAP_TB : 0), 0);
1034
1035 /* SERVER is the last command sent before switching to ziplinks.
1036 * We set TCPNODELAY on the socket to make sure it gets sent out
1037 * on the wire immediately. Otherwise, it could be sitting in
1038 * a kernel buffer when we start sending zipped data, and the
1039 * parser on the receiving side can't hand both unzipped and zipped
1040 * data in one packet. --Rodder
1041 *
1042 * currently we only need to call send_queued_write,
1043 * Nagle is already disabled at this point --adx
1044 */
1045 sendto_one(client_p, "SERVER %s 1 :%s%s",
1046 my_name_for_link(conf),
1047 ConfigServerHide.hidden ? "(H) " : "",
1048 (me.info[0]) ? (me.info) : "IRCers United");
1049 send_queued_write(client_p);
1050 }
1051
1052 /* Hand the server off to servlink now */
1053 if (IsCapable(client_p, CAP_ENC) || IsCapable(client_p, CAP_ZIP))
1054 {
1055 if (fork_server(client_p) < 0)
1056 {
1057 sendto_realops_flags(UMODE_ALL, L_ADMIN,
1058 "Warning: fork failed for server %s -- check servlink_path (%s)",
1059 get_client_name(client_p, HIDE_IP), ConfigFileEntry.servlink_path);
1060 sendto_realops_flags(UMODE_ALL, L_OPER, "Warning: fork failed for server "
1061 "%s -- check servlink_path (%s)",
1062 get_client_name(client_p, MASK_IP),
1063 ConfigFileEntry.servlink_path);
1064 exit_client(client_p, &me, "fork failed");
1065 return;
1066 }
1067
1068 start_io(client_p);
1069 SetServlink(client_p);
1070 }
1071
1072 /* only send ts6 format SVINFO if we have ts6 enabled */
1073 sendto_one(client_p, "SVINFO %d %d 0 :%lu",
1074 (me.id[0] ? TS_CURRENT : 5), TS_MIN,
1075 (unsigned long)CurrentTime);
1076
1077 /* assumption here is if they passed the correct TS version, they also passed an SID */
1078 if (IsCapable(client_p, CAP_TS6))
1079 hash_add_id(client_p);
1080
1081 /* XXX Does this ever happen? I don't think so -db */
1082 detach_conf(client_p, OPER_TYPE);
1083
1084 /* *WARNING*
1085 ** In the following code in place of plain server's
1086 ** name we send what is returned by get_client_name
1087 ** which may add the "sockhost" after the name. It's
1088 ** *very* *important* that there is a SPACE between
1089 ** the name and sockhost (if present). The receiving
1090 ** server will start the information field from this
1091 ** first blank and thus puts the sockhost into info.
1092 ** ...a bit tricky, but you have been warned, besides
1093 ** code is more neat this way... --msa
1094 */
1095 client_p->servptr = &me;
1096
1097 if (IsClosing(client_p))
1098 return;
1099
1100 SetServer(client_p);
1101
1102 /* Update the capability combination usage counts. -A1kmm */
1103 set_chcap_usage_counts(client_p);
1104
1105 /* Some day, all these lists will be consolidated *sigh* */
1106 dlinkAdd(client_p, &client_p->lnode, &me.serv->server_list);
1107
1108 m = dlinkFind(&unknown_list, client_p);
1109 assert(NULL != m);
1110
1111 dlinkDelete(m, &unknown_list);
1112 dlinkAdd(client_p, m, &serv_list);
1113
1114 Count.myserver++;
1115
1116 dlinkAdd(client_p, make_dlink_node(), &global_serv_list);
1117 hash_add_client(client_p);
1118
1119 /* doesnt duplicate client_p->serv if allocated this struct already */
1120 make_server(client_p);
1121
1122 /* fixing eob timings.. -gnp */
1123 client_p->firsttime = CurrentTime;
1124
1125 /* Show the real host/IP to admins */
1126 sendto_realops_flags(UMODE_ALL, L_ADMIN,
1127 "Link with %s established: (%s) link",
1128 inpath_ip,show_capabilities(client_p));
1129 /* Now show the masked hostname/IP to opers */
1130 sendto_realops_flags(UMODE_ALL, L_OPER,
1131 "Link with %s established: (%s) link",
1132 inpath,show_capabilities(client_p));
1133 ilog(L_NOTICE, "Link with %s established: (%s) link",
1134 inpath_ip, show_capabilities(client_p));
1135
1136 client_p->serv->sconf = conf;
1137
1138 if (HasServlink(client_p))
1139 {
1140 /* we won't overflow FD_DESC_SZ here, as it can hold
1141 * client_p->name + 64
1142 */
1143 fd_note(&client_p->localClient->fd, "slink data: %s", client_p->name);
1144 fd_note(&client_p->localClient->ctrlfd, "slink ctrl: %s", client_p->name);
1145 }
1146 else
1147 fd_note(&client_p->localClient->fd, "Server: %s", client_p->name);
1148
1149 /* Old sendto_serv_but_one() call removed because we now
1150 ** need to send different names to different servers
1151 ** (domain name matching) Send new server to other servers.
1152 */
1153 DLINK_FOREACH(ptr, serv_list.head)
1154 {
1155 target_p = ptr->data;
1156
1157 if (target_p == client_p)
1158 continue;
1159
1160 if ((conf = target_p->serv->sconf) &&
1161 match(my_name_for_link(conf), client_p->name))
1162 continue;
1163
1164 if (IsCapable(target_p, CAP_TS6) && HasID(client_p))
1165 sendto_one(target_p, ":%s SID %s 2 %s :%s%s",
1166 me.id, client_p->name, client_p->id,
1167 IsHidden(client_p) ? "(H) " : "",
1168 client_p->info);
1169 else
1170 sendto_one(target_p,":%s SERVER %s 2 :%s%s",
1171 me.name, client_p->name,
1172 IsHidden(client_p) ? "(H) " : "",
1173 client_p->info);
1174 }
1175
1176 /* Pass on my client information to the new server
1177 **
1178 ** First, pass only servers (idea is that if the link gets
1179 ** cancelled beacause the server was already there,
1180 ** there are no NICK's to be cancelled...). Of course,
1181 ** if cancellation occurs, all this info is sent anyway,
1182 ** and I guess the link dies when a read is attempted...? --msa
1183 **
1184 ** Note: Link cancellation to occur at this point means
1185 ** that at least two servers from my fragment are building
1186 ** up connection this other fragment at the same time, it's
1187 ** a race condition, not the normal way of operation...
1188 **
1189 ** ALSO NOTE: using the get_client_name for server names--
1190 ** see previous *WARNING*!!! (Also, original inpath
1191 ** is destroyed...)
1192 */
1193
1194 conf = client_p->serv->sconf;
1195
1196 DLINK_FOREACH_PREV(ptr, global_serv_list.tail)
1197 {
1198 target_p = ptr->data;
1199
1200 /* target_p->from == target_p for target_p == client_p */
1201 if (target_p->from == client_p)
1202 continue;
1203
1204 if (match(my_name_for_link(conf), target_p->name))
1205 continue;
1206
1207 if (IsCapable(client_p, CAP_TS6))
1208 {
1209 if (HasID(target_p))
1210 sendto_one(client_p, ":%s SID %s %d %s :%s%s",
1211 ID(target_p->servptr), target_p->name, target_p->hopcount+1,
1212 target_p->id, IsHidden(target_p) ? "(H) " : "",
1213 target_p->info);
1214 else /* introducing non-ts6 server */
1215 sendto_one(client_p, ":%s SERVER %s %d :%s%s",
1216 ID(target_p->servptr), target_p->name, target_p->hopcount+1,
1217 IsHidden(target_p) ? "(H) " : "", target_p->info);
1218 }
1219 else
1220 sendto_one(client_p, ":%s SERVER %s %d :%s%s",
1221 target_p->servptr->name, target_p->name, target_p->hopcount+1,
1222 IsHidden(target_p) ? "(H) " : "", target_p->info);
1223 }
1224
1225 server_burst(client_p);
1226 }
1227
1228 static void
1229 start_io(struct Client *server)
1230 {
1231 struct LocalUser *lserver = server->localClient;
1232 int alloclen = 1;
1233 char *buf;
1234 dlink_node *ptr;
1235 struct dbuf_block *block;
1236
1237 /* calculate how many bytes to allocate */
1238 if (IsCapable(server, CAP_ZIP))
1239 alloclen += 6;
1240 #ifdef HAVE_LIBCRYPTO
1241 if (IsCapable(server, CAP_ENC))
1242 alloclen += 16 + lserver->in_cipher->keylen + lserver->out_cipher->keylen;
1243 #endif
1244 alloclen += dbuf_length(&lserver->buf_recvq);
1245 alloclen += dlink_list_length(&lserver->buf_recvq.blocks) * 3;
1246 alloclen += dbuf_length(&lserver->buf_sendq);
1247 alloclen += dlink_list_length(&lserver->buf_sendq.blocks) * 3;
1248
1249 /* initialize servlink control sendq */
1250 lserver->slinkq = buf = MyMalloc(alloclen);
1251 lserver->slinkq_ofs = 0;
1252 lserver->slinkq_len = alloclen;
1253
1254 if (IsCapable(server, CAP_ZIP))
1255 {
1256 /* ziplink */
1257 *buf++ = SLINKCMD_SET_ZIP_OUT_LEVEL;
1258 *buf++ = 0; /* | */
1259 *buf++ = 1; /* \ len is 1 */
1260 *buf++ = ConfigFileEntry.compression_level;
1261 *buf++ = SLINKCMD_START_ZIP_IN;
1262 *buf++ = SLINKCMD_START_ZIP_OUT;
1263 }
1264 #ifdef HAVE_LIBCRYPTO
1265 if (IsCapable(server, CAP_ENC))
1266 {
1267 /* Decryption settings */
1268 *buf++ = SLINKCMD_SET_CRYPT_IN_CIPHER;
1269 *buf++ = 0; /* / (upper 8-bits of len) */
1270 *buf++ = 1; /* \ cipher id is 1 byte (lower 8-bits of len) */
1271 *buf++ = lserver->in_cipher->cipherid;
1272 *buf++ = SLINKCMD_SET_CRYPT_IN_KEY;
1273 *buf++ = 0; /* keylen < 256 */
1274 *buf++ = lserver->in_cipher->keylen;
1275 memcpy(buf, lserver->in_key, lserver->in_cipher->keylen);
1276 buf += lserver->in_cipher->keylen;
1277 /* Encryption settings */
1278 *buf++ = SLINKCMD_SET_CRYPT_OUT_CIPHER;
1279 *buf++ = 0; /* / (upper 8-bits of len) */
1280 *buf++ = 1; /* \ cipher id is 1 byte (lower 8-bits of len) */
1281 *buf++ = lserver->out_cipher->cipherid;
1282 *buf++ = SLINKCMD_SET_CRYPT_OUT_KEY;
1283 *buf++ = 0; /* keylen < 256 */
1284 *buf++ = lserver->out_cipher->keylen;
1285 memcpy(buf, lserver->out_key, lserver->out_cipher->keylen);
1286 buf += lserver->out_cipher->keylen;
1287 *buf++ = SLINKCMD_START_CRYPT_IN;
1288 *buf++ = SLINKCMD_START_CRYPT_OUT;
1289 }
1290 #endif
1291
1292 /* pass the whole recvq to servlink */
1293 DLINK_FOREACH (ptr, lserver->buf_recvq.blocks.head)
1294 {
1295 block = ptr->data;
1296 *buf++ = SLINKCMD_INJECT_RECVQ;
1297 *buf++ = (block->size >> 8);
1298 *buf++ = (block->size & 0xff);
1299 memcpy(buf, &block->data[0], block->size);
1300 buf += block->size;
1301 }
1302
1303 dbuf_clear(&lserver->buf_recvq);
1304
1305 /* pass the whole sendq to servlink */
1306 DLINK_FOREACH (ptr, lserver->buf_sendq.blocks.head)
1307 {
1308 block = ptr->data;
1309 *buf++ = SLINKCMD_INJECT_SENDQ;
1310 *buf++ = (block->size >> 8);
1311 *buf++ = (block->size & 0xff);
1312 memcpy(buf, &block->data[0], block->size);
1313 buf += block->size;
1314 }
1315
1316 dbuf_clear(&lserver->buf_sendq);
1317
1318 /* start io */
1319 *buf++ = SLINKCMD_INIT;
1320
1321 /* schedule a write */
1322 send_queued_slink_write(server);
1323 }
1324
1325 /* fork_server()
1326 *
1327 * inputs - struct Client *server
1328 * output - success: 0 / failure: -1
1329 * side effect - fork, and exec SERVLINK to handle this connection
1330 */
1331 static int
1332 fork_server(struct Client *server)
1333 {
1334 #ifndef HAVE_SOCKETPAIR
1335 return -1;
1336 #else
1337 int i;
1338 int slink_fds[2][2];
1339 /* 0? - ctrl | 1? - data
1340 * ?0 - child | ?1 - parent */
1341
1342 if (socketpair(AF_UNIX, SOCK_STREAM, 0, slink_fds[0]) < 0)
1343 return -1;
1344 if (socketpair(AF_UNIX, SOCK_STREAM, 0, slink_fds[1]) < 0)
1345 goto free_ctrl_fds;
1346
1347 if ((i = fork()) < 0)
1348 {
1349 close(slink_fds[1][0]); close(slink_fds[1][1]);
1350 free_ctrl_fds:
1351 close(slink_fds[0][0]); close(slink_fds[0][1]);
1352 return -1;
1353 }
1354
1355 if (i == 0)
1356 {
1357 char fd_str[3][6]; /* store 3x sizeof("65535") */
1358 char *kid_argv[7];
1359
1360 #ifdef O_ASYNC
1361 fcntl(server->localClient->fd.fd, F_SETFL,
1362 fcntl(server->localClient->fd.fd, F_GETFL, 0) & ~O_ASYNC);
1363 #endif
1364 close_fds(&server->localClient->fd);
1365 close(slink_fds[0][1]);
1366 close(slink_fds[1][1]);
1367
1368 sprintf(fd_str[0], "%d", slink_fds[0][0]);
1369 sprintf(fd_str[1], "%d", slink_fds[1][0]);
1370 sprintf(fd_str[2], "%d", server->localClient->fd.fd);
1371
1372 kid_argv[0] = "-slink";
1373 kid_argv[1] = kid_argv[2] = fd_str[0]; /* ctrl */
1374 kid_argv[3] = kid_argv[4] = fd_str[1]; /* data */
1375 kid_argv[5] = fd_str[2]; /* network */
1376 kid_argv[6] = NULL;
1377
1378 execv(ConfigFileEntry.servlink_path, kid_argv);
1379
1380 _exit(1);
1381 }
1382
1383 /* close the network fd and the child ends of the pipes */
1384 fd_close(&server->localClient->fd);
1385 close(slink_fds[0][0]);
1386 close(slink_fds[1][0]);
1387
1388 execute_callback(setup_socket_cb, slink_fds[0][1]);
1389 execute_callback(setup_socket_cb, slink_fds[1][1]);
1390
1391 fd_open(&server->localClient->ctrlfd, slink_fds[0][1], 1, "slink ctrl");
1392 fd_open(&server->localClient->fd, slink_fds[1][1], 1, "slink data");
1393
1394 read_ctrl_packet(&server->localClient->ctrlfd, server);
1395 read_packet(&server->localClient->fd, server);
1396
1397 return 0;
1398 #endif
1399 }
1400
1401 /* server_burst()
1402 *
1403 * inputs - struct Client pointer server
1404 * -
1405 * output - none
1406 * side effects - send a server burst
1407 * bugs - still too long
1408 */
1409 static void
1410 server_burst(struct Client *client_p)
1411 {
1412 /* Send it in the shortened format with the TS, if
1413 ** it's a TS server; walk the list of channels, sending
1414 ** all the nicks that haven't been sent yet for each
1415 ** channel, then send the channel itself -- it's less
1416 ** obvious than sending all nicks first, but on the
1417 ** receiving side memory will be allocated more nicely
1418 ** saving a few seconds in the handling of a split
1419 ** -orabidoo
1420 */
1421
1422 burst_all(client_p);
1423
1424 /* EOB stuff is now in burst_all */
1425 /* Always send a PING after connect burst is done */
1426 sendto_one(client_p, "PING :%s", ID_or_name(&me, client_p));
1427 }
1428
1429 /* burst_all()
1430 *
1431 * inputs - pointer to server to send burst to
1432 * output - NONE
1433 * side effects - complete burst of channels/nicks is sent to client_p
1434 */
1435 static void
1436 burst_all(struct Client *client_p)
1437 {
1438 dlink_node *ptr = NULL;
1439
1440 DLINK_FOREACH(ptr, global_channel_list.head)
1441 {
1442 struct Channel *chptr = ptr->data;
1443
1444 if (dlink_list_length(&chptr->members) != 0)
1445 {
1446 burst_members(client_p, chptr);
1447 send_channel_modes(client_p, chptr);
1448
1449 if (IsCapable(client_p, CAP_TBURST) ||
1450 IsCapable(client_p, CAP_TB))
1451 send_tb(client_p, chptr);
1452 }
1453 }
1454
1455 /* also send out those that are not on any channel
1456 */
1457 DLINK_FOREACH(ptr, global_client_list.head)
1458 {
1459 struct Client *target_p = ptr->data;
1460
1461 if (!IsBursted(target_p) && target_p->from != client_p)
1462 sendnick_TS(client_p, target_p);
1463
1464 ClearBursted(target_p);
1465 }
1466
1467 /* We send the time we started the burst, and let the remote host determine an EOB time,
1468 ** as otherwise we end up sending a EOB of 0 Sending here means it gets sent last -- fl
1469 */
1470 /* Its simpler to just send EOB and use the time its been connected.. --fl_ */
1471 if (IsCapable(client_p, CAP_EOB))
1472 sendto_one(client_p, ":%s EOB", ID_or_name(&me, client_p));
1473 }
1474
1475 /*
1476 * send_tb
1477 *
1478 * inputs - pointer to Client
1479 * - pointer to channel
1480 * output - NONE
1481 * side effects - Called on a server burst when
1482 * server is CAP_TB|CAP_TBURST capable
1483 */
1484 static void
1485 send_tb(struct Client *client_p, struct Channel *chptr)
1486 {
1487 /*
1488 * We may also send an empty topic here, but only if topic_time isn't 0,
1489 * i.e. if we had a topic that got unset. This is required for syncing
1490 * topics properly.
1491 *
1492 * Imagine the following scenario: Our downlink introduces a channel
1493 * to us with a TS that is equal to ours, but the channel topic on
1494 * their side got unset while the servers were in splitmode, which means
1495 * their 'topic' is newer. They simply wanted to unset it, so we have to
1496 * deal with it in a more sophisticated fashion instead of just resetting
1497 * it to their old topic they had before. Read m_tburst.c:ms_tburst
1498 * for further information -Michael
1499 */
1500 if (chptr->topic_time != 0)
1501 {
1502 if (IsCapable(client_p, CAP_TBURST))
1503 sendto_one(client_p, ":%s TBURST %lu %s %lu %s :%s",
1504 me.name, (unsigned long)chptr->channelts, chptr->chname,
1505 (unsigned long)chptr->topic_time,
1506 chptr->topic_info ? chptr->topic_info : "",
1507 chptr->topic ? chptr->topic : "");
1508 else if (IsCapable(client_p, CAP_TB))
1509 {
1510 if (ConfigChannel.burst_topicwho)
1511 {
1512 sendto_one(client_p, ":%s TB %s %lu %s :%s",
1513 me.name, chptr->chname,
1514 (unsigned long)chptr->topic_time,
1515 chptr->topic_info, chptr->topic ? chptr->topic : "");
1516 }
1517 else
1518 {
1519 sendto_one(client_p, ":%s TB %s %lu :%s",
1520 me.name, chptr->chname,
1521 (unsigned long)chptr->topic_time,
1522 chptr->topic ? chptr->topic : "");
1523 }
1524 }
1525 }
1526 }
1527
1528 /* burst_members()
1529 *
1530 * inputs - pointer to server to send members to
1531 * - dlink_list pointer to membership list to send
1532 * output - NONE
1533 * side effects -
1534 */
1535 static void
1536 burst_members(struct Client *client_p, struct Channel *chptr)
1537 {
1538 struct Client *target_p;
1539 struct Membership *ms;
1540 dlink_node *ptr;
1541
1542 DLINK_FOREACH(ptr, chptr->members.head)
1543 {
1544 ms = ptr->data;
1545 target_p = ms->client_p;
1546
1547 if (!IsBursted(target_p))
1548 {
1549 SetBursted(target_p);
1550
1551 if (target_p->from != client_p)
1552 sendnick_TS(client_p, target_p);
1553 }
1554 }
1555 }
1556
1557 /* set_autoconn()
1558 *
1559 * inputs - struct Client pointer to oper requesting change
1560 * output - none
1561 * side effects - set autoconnect mode
1562 */
1563 void
1564 set_autoconn(struct Client *source_p, const char *name, int newval)
1565 {
1566 struct ConfItem *conf;
1567 struct AccessItem *aconf;
1568
1569 if (name != NULL)
1570 {
1571 conf = find_exact_name_conf(SERVER_TYPE, name, NULL, NULL);
1572 if (conf != NULL)
1573 {
1574 aconf = (struct AccessItem *)map_to_conf(conf);
1575 if (newval)
1576 SetConfAllowAutoConn(aconf);
1577 else
1578 ClearConfAllowAutoConn(aconf);
1579
1580 sendto_realops_flags(UMODE_ALL, L_ALL,
1581 "%s has changed AUTOCONN for %s to %i",
1582 source_p->name, name, newval);
1583 sendto_one(source_p,
1584 ":%s NOTICE %s :AUTOCONN for %s is now set to %i",
1585 me.name, source_p->name, name, newval);
1586 }
1587 else
1588 {
1589 sendto_one(source_p, ":%s NOTICE %s :Can't find %s",
1590 me.name, source_p->name, name);
1591 }
1592 }
1593 else
1594 {
1595 sendto_one(source_p, ":%s NOTICE %s :Please specify a server name!",
1596 me.name, source_p->name);
1597 }
1598 }
1599
1600 /* New server connection code
1601 * Based upon the stuff floating about in s_bsd.c
1602 * -- adrian
1603 */
1604
1605 /* serv_connect() - initiate a server connection
1606 *
1607 * inputs - pointer to conf
1608 * - pointer to client doing the connect
1609 * output -
1610 * side effects -
1611 *
1612 * This code initiates a connection to a server. It first checks to make
1613 * sure the given server exists. If this is the case, it creates a socket,
1614 * creates a client, saves the socket information in the client, and
1615 * initiates a connection to the server through comm_connect_tcp(). The
1616 * completion of this goes through serv_completed_connection().
1617 *
1618 * We return 1 if the connection is attempted, since we don't know whether
1619 * it suceeded or not, and 0 if it fails in here somewhere.
1620 */
1621 int
1622 serv_connect(struct AccessItem *aconf, struct Client *by)
1623 {
1624 struct ConfItem *conf;
1625 struct Client *client_p;
1626 char buf[HOSTIPLEN];
1627
1628 /* conversion structs */
1629 struct sockaddr_in *v4;
1630 /* Make sure aconf is useful */
1631 assert(aconf != NULL);
1632
1633 if(aconf == NULL)
1634 return (0);
1635
1636 /* XXX should be passing struct ConfItem in the first place */
1637 conf = unmap_conf_item(aconf);
1638
1639 /* log */
1640 irc_getnameinfo((struct sockaddr*)&aconf->ipnum, aconf->ipnum.ss_len,
1641 buf, HOSTIPLEN, NULL, 0, NI_NUMERICHOST);
1642 ilog(L_NOTICE, "Connect to %s[%s] @%s", aconf->user, aconf->host,
1643 buf);
1644
1645 /* Still processing a DNS lookup? -> exit */
1646 if (aconf->dns_query != NULL)
1647 {
1648 sendto_realops_flags(UMODE_ALL, L_OPER,
1649 "Error connecting to %s: Error during DNS lookup", conf->name);
1650 return (0);
1651 }
1652
1653 /* Make sure this server isn't already connected
1654 * Note: aconf should ALWAYS be a valid C: line
1655 */
1656 if ((client_p = find_server(conf->name)) != NULL)
1657 {
1658 sendto_realops_flags(UMODE_ALL, L_ADMIN,
1659 "Server %s already present from %s",
1660 conf->name, get_client_name(client_p, SHOW_IP));
1661 sendto_realops_flags(UMODE_ALL, L_OPER,
1662 "Server %s already present from %s",
1663 conf->name, get_client_name(client_p, MASK_IP));
1664 if (by && IsClient(by) && !MyClient(by))
1665 sendto_one(by, ":%s NOTICE %s :Server %s already present from %s",
1666 me.name, by->name, conf->name,
1667 get_client_name(client_p, MASK_IP));
1668 return (0);
1669 }
1670
1671 /* Create a local client */
1672 client_p = make_client(NULL);
1673
1674 /* Copy in the server, hostname, fd */
1675 strlcpy(client_p->name, conf->name, sizeof(client_p->name));
1676 strlcpy(client_p->host, aconf->host, sizeof(client_p->host));
1677
1678 /* We already converted the ip once, so lets use it - stu */
1679 strlcpy(client_p->sockhost, buf, HOSTIPLEN);
1680
1681 /* create a socket for the server connection */
1682 if (comm_open(&client_p->localClient->fd, aconf->ipnum.ss.ss_family,
1683 SOCK_STREAM, 0, NULL) < 0)
1684 {
1685 /* Eek, failure to create the socket */
1686 report_error(L_ALL,
1687 "opening stream socket to %s: %s", conf->name, errno);
1688 SetDead(client_p);
1689 exit_client(client_p, &me, "Connection failed");
1690 return (0);
1691 }
1692
1693 /* servernames are always guaranteed under HOSTLEN chars */
1694 fd_note(&client_p->localClient->fd, "Server: %s", conf->name);
1695
1696 /* Attach config entries to client here rather than in
1697 * serv_connect_callback(). This to avoid null pointer references.
1698 */
1699 if (!attach_connect_block(client_p, conf->name, aconf->host))
1700 {
1701 sendto_realops_flags(UMODE_ALL, L_ALL,
1702 "Host %s is not enabled for connecting:no C/N-line",
1703 conf->name);
1704 if (by && IsClient(by) && !MyClient(by))
1705 sendto_one(by, ":%s NOTICE %s :Connect to host %s failed.",
1706 me.name, by->name, client_p->name);
1707 SetDead(client_p);
1708 exit_client(client_p, client_p, "Connection failed");
1709 return (0);
1710 }
1711
1712 /* at this point we have a connection in progress and C/N lines
1713 * attached to the client, the socket info should be saved in the
1714 * client and it should either be resolved or have a valid address.
1715 *
1716 * The socket has been connected or connect is in progress.
1717 */
1718 make_server(client_p);
1719
1720 if (by && IsClient(by))
1721 strlcpy(client_p->serv->by, by->name, sizeof(client_p->serv->by));
1722 else
1723 strlcpy(client_p->serv->by, "AutoConn.", sizeof(client_p->serv->by));
1724
1725 SetConnecting(client_p);
1726 dlinkAdd(client_p, &client_p->node, &global_client_list);
1727 /* from def_fam */
1728 client_p->localClient->aftype = aconf->aftype;
1729
1730 /* Now, initiate the connection */
1731 /* XXX assume that a non 0 type means a specific bind address
1732 * for this connect.
1733 */
1734 switch (aconf->aftype)
1735 {
1736 case AF_INET:
1737 v4 = (struct sockaddr_in*)&aconf->my_ipnum;
1738 if (v4->sin_addr.s_addr != 0)
1739 {
1740 struct irc_ssaddr ipn;
1741 memset(&ipn, 0, sizeof(struct irc_ssaddr));
1742 ipn.ss.ss_family = AF_INET;
1743 ipn.ss_port = 0;
1744 memcpy(&ipn, &aconf->my_ipnum, sizeof(struct irc_ssaddr));
1745 comm_connect_tcp(&client_p->localClient->fd, aconf->host, aconf->port,
1746 (struct sockaddr *)&ipn, ipn.ss_len,
1747 serv_connect_callback, client_p, aconf->aftype,
1748 CONNECTTIMEOUT);
1749 }
1750 else if (ServerInfo.specific_ipv4_vhost)
1751 {
1752 struct irc_ssaddr ipn;
1753 memset(&ipn, 0, sizeof(struct irc_ssaddr));
1754 ipn.ss.ss_family = AF_INET;
1755 ipn.ss_port = 0;
1756 memcpy(&ipn, &ServerInfo.ip, sizeof(struct irc_ssaddr));
1757 comm_connect_tcp(&client_p->localClient->fd, aconf->host, aconf->port,
1758 (struct sockaddr *)&ipn, ipn.ss_len,
1759 serv_connect_callback, client_p, aconf->aftype,
1760 CONNECTTIMEOUT);
1761 }
1762 else
1763 comm_connect_tcp(&client_p->localClient->fd, aconf->host, aconf->port,
1764 NULL, 0, serv_connect_callback, client_p, aconf->aftype,
1765 CONNECTTIMEOUT);
1766 break;
1767 #ifdef IPV6
1768 case AF_INET6:
1769 {
1770 struct irc_ssaddr ipn;
1771 struct sockaddr_in6 *v6;
1772 struct sockaddr_in6 *v6conf;
1773
1774 memset(&ipn, 0, sizeof(struct irc_ssaddr));
1775 v6conf = (struct sockaddr_in6 *)&aconf->my_ipnum;
1776 v6 = (struct sockaddr_in6 *)&ipn;
1777
1778 if (memcmp(&v6conf->sin6_addr, &v6->sin6_addr,
1779 sizeof(struct in6_addr)) != 0)
1780 {
1781 memcpy(&ipn, &aconf->my_ipnum, sizeof(struct irc_ssaddr));
1782 ipn.ss.ss_family = AF_INET6;
1783 ipn.ss_port = 0;
1784 comm_connect_tcp(&client_p->localClient->fd,
1785 aconf->host, aconf->port,
1786 (struct sockaddr *)&ipn, ipn.ss_len,
1787 serv_connect_callback, client_p,
1788 aconf->aftype, CONNECTTIMEOUT);
1789 }
1790 else if (ServerInfo.specific_ipv6_vhost)
1791 {
1792 memcpy(&ipn, &ServerInfo.ip6, sizeof(struct irc_ssaddr));
1793 ipn.ss.ss_family = AF_INET6;
1794 ipn.ss_port = 0;
1795 comm_connect_tcp(&client_p->localClient->fd,
1796 aconf->host, aconf->port,
1797 (struct sockaddr *)&ipn, ipn.ss_len,
1798 serv_connect_callback, client_p,
1799 aconf->aftype, CONNECTTIMEOUT);
1800 }
1801 else
1802 comm_connect_tcp(&client_p->localClient->fd,
1803 aconf->host, aconf->port,
1804 NULL, 0, serv_connect_callback, client_p,
1805 aconf->aftype, CONNECTTIMEOUT);
1806 }
1807 #endif
1808 }
1809 return (1);
1810 }
1811
1812 /* serv_connect_callback() - complete a server connection.
1813 *
1814 * This routine is called after the server connection attempt has
1815 * completed. If unsucessful, an error is sent to ops and the client
1816 * is closed. If sucessful, it goes through the initialisation/check
1817 * procedures, the capabilities are sent, and the socket is then
1818 * marked for reading.
1819 */
1820 static void
1821 serv_connect_callback(fde_t *fd, int status, void *data)
1822 {
1823 struct Client *client_p = data;
1824 struct ConfItem *conf=NULL;
1825 struct AccessItem *aconf=NULL;
1826
1827 /* First, make sure its a real client! */
1828 assert(client_p != NULL);
1829 assert(&client_p->localClient->fd == fd);
1830
1831 /* Next, for backward purposes, record the ip of the server */
1832 memcpy(&client_p->localClient->ip, &fd->connect.hostaddr,
1833 sizeof(struct irc_ssaddr));
1834 /* Check the status */
1835 if (status != COMM_OK)
1836 {
1837 /* We have an error, so report it and quit
1838 * Admins get to see any IP, mere opers don't *sigh*
1839 */
1840 if (ConfigServerHide.hide_server_ips)
1841 sendto_realops_flags(UMODE_ALL, L_ADMIN,
1842 "Error connecting to %s: %s",
1843 client_p->name, comm_errstr(status));
1844 else
1845 sendto_realops_flags(UMODE_ALL, L_ADMIN,
1846 "Error connecting to %s[%s]: %s", client_p->name,
1847 client_p->host, comm_errstr(status));
1848
1849 sendto_realops_flags(UMODE_ALL, L_OPER,
1850 "Error connecting to %s: %s",
1851 client_p->name, comm_errstr(status));
1852
1853 /* If a fd goes bad, call dead_link() the socket is no
1854 * longer valid for reading or writing.
1855 */
1856 dead_link_on_write(client_p, 0);
1857 return;
1858 }
1859
1860 /* COMM_OK, so continue the connection procedure */
1861 /* Get the C/N lines */
1862 conf = find_conf_name(&client_p->localClient->confs,
1863 client_p->name, SERVER_TYPE);
1864 if (conf == NULL)
1865 {
1866 sendto_realops_flags(UMODE_ALL, L_ADMIN,
1867 "Lost connect{} block for %s", get_client_name(client_p, HIDE_IP));
1868 sendto_realops_flags(UMODE_ALL, L_OPER,
1869 "Lost connect{} block for %s", get_client_name(client_p, MASK_IP));
1870
1871 exit_client(client_p, &me, "Lost connect{} block");
1872 return;
1873 }
1874
1875 aconf = (struct AccessItem *)map_to_conf(conf);
1876 /* Next, send the initial handshake */
1877 SetHandshake(client_p);
1878
1879 #ifdef HAVE_LIBCRYPTO
1880 /* Handle all CRYPTLINK links in cryptlink_init */
1881 if (IsConfCryptLink(aconf))
1882 {
1883 cryptlink_init(client_p, conf, fd);
1884 return;
1885 }
1886 #endif
1887
1888 /* jdc -- Check and send spasswd, not passwd. */
1889 if (!EmptyString(aconf->spasswd) && (me.id[0] != '\0'))
1890 /* Send TS 6 form only if id */
1891 sendto_one(client_p, "PASS %s TS %d %s",
1892 aconf->spasswd, TS_CURRENT, me.id);
1893 else
1894 sendto_one(client_p, "PASS %s TS 5",
1895 aconf->spasswd);
1896
1897 /* Pass my info to the new server
1898 *
1899 * If this is a HUB, pass on CAP_HUB
1900 * Pass on ZIP if supported
1901 * Pass on TB if supported.
1902 * - Dianora
1903 */
1904 send_capabilities(client_p, aconf, (ServerInfo.hub ? CAP_HUB : 0)
1905 | (IsConfCompressed(aconf) ? CAP_ZIP : 0)
1906 | (IsConfTopicBurst(aconf) ? CAP_TBURST|CAP_TB : 0), 0);
1907
1908 sendto_one(client_p, "SERVER %s 1 :%s%s",
1909 my_name_for_link(conf),
1910 ConfigServerHide.hidden ? "(H) " : "",
1911 me.info);
1912
1913 /* If we've been marked dead because a send failed, just exit
1914 * here now and save everyone the trouble of us ever existing.
1915 */
1916 if (IsDead(client_p))
1917 {
1918 sendto_realops_flags(UMODE_ALL, L_ADMIN,
1919 "%s[%s] went dead during handshake",
1920 client_p->name,
1921 client_p->host);
1922 sendto_realops_flags(UMODE_ALL, L_OPER,
1923 "%s went dead during handshake", client_p->name);
1924 return;
1925 }
1926
1927 /* don't move to serv_list yet -- we haven't sent a burst! */
1928 /* If we get here, we're ok, so lets start reading some data */
1929 comm_setselect(fd, COMM_SELECT_READ, read_packet, client_p, 0);
1930 }
1931
1932 struct Client *
1933 find_servconn_in_progress(const char *name)
1934 {
1935 dlink_node *ptr;
1936 struct Client *cptr;
1937
1938 DLINK_FOREACH(ptr, unknown_list.head)
1939 {
1940 cptr = ptr->data;
1941
1942 if (cptr && cptr->name[0])
1943 if (match(cptr->name, name) || match(name, cptr->name))
1944 return cptr;
1945 }
1946
1947 return NULL;
1948 }
1949
1950 #ifdef HAVE_LIBCRYPTO
1951 /*
1952 * sends a CRYPTLINK SERV command.
1953 */
1954 void
1955 cryptlink_init(struct Client *client_p, struct ConfItem *conf, fde_t *fd)
1956 {
1957 struct AccessItem *aconf;
1958 char *encrypted;
1959 unsigned char *key_to_send;
1960 char randkey[CIPHERKEYLEN];
1961 int enc_len;
1962
1963 /* get key */
1964 if ((!ServerInfo.rsa_private_key) ||
1965 (!RSA_check_key(ServerInfo.rsa_private_key)) )
1966 {
1967 cryptlink_error(client_p, "SERV", "Invalid RSA private key",
1968 "Invalid RSA private key");
1969 return;
1970 }
1971
1972 aconf = (struct AccessItem *)map_to_conf(conf);
1973
1974 if (aconf->rsa_public_key == NULL)
1975 {
1976 cryptlink_error(client_p, "SERV", "Invalid RSA public key",
1977 "Invalid RSA public key");
1978 return;
1979 }
1980
1981 if (get_randomness((unsigned char *)randkey, CIPHERKEYLEN) != 1)
1982 {
1983 cryptlink_error(client_p, "SERV", "Couldn't generate keyphrase",
1984 "Couldn't generate keyphrase");
1985 return;
1986 }
1987
1988 encrypted = MyMalloc(RSA_size(ServerInfo.rsa_private_key));
1989 enc_len = RSA_public_encrypt(CIPHERKEYLEN,
1990 (unsigned char *)randkey,
1991 (unsigned char *)encrypted,
1992 aconf->rsa_public_key,
1993 RSA_PKCS1_PADDING);
1994
1995 memcpy(client_p->localClient->in_key, randkey, CIPHERKEYLEN);
1996
1997 if (enc_len <= 0)
1998 {
1999 report_crypto_errors();
2000 MyFree(encrypted);
2001 cryptlink_error(client_p, "SERV", "Couldn't encrypt data",
2002 "Couldn't encrypt data");
2003 return;
2004 }
2005
2006 if (!(base64_block(&key_to_send, encrypted, enc_len)))
2007 {
2008 MyFree(encrypted);
2009 cryptlink_error(client_p, "SERV", "Couldn't base64 encode key",
2010 "Couldn't base64 encode key");
2011 return;
2012 }
2013
2014 send_capabilities(client_p, aconf, (ServerInfo.hub ? CAP_HUB : 0)
2015 | (IsConfCompressed(aconf) ? CAP_ZIP : 0)
2016 | (IsConfTopicBurst(aconf) ? CAP_TBURST|CAP_TB : 0), CAP_ENC_MASK);
2017
2018 if (me.id[0])
2019 sendto_one(client_p, "PASS . TS %d %s", TS_CURRENT, me.id);
2020
2021 sendto_one(client_p, "CRYPTLINK SERV %s %s :%s%s",
2022 my_name_for_link(conf), key_to_send,
2023 ConfigServerHide.hidden ? "(H) " : "", me.info);
2024
2025 SetHandshake(client_p);
2026 SetWaitAuth(client_p);
2027
2028 MyFree(encrypted);
2029 MyFree(key_to_send);
2030
2031 if (IsDead(client_p))
2032 cryptlink_error(client_p, "SERV", "Went dead during handshake",
2033 "Went dead during handshake");
2034 else if (fd != NULL)
2035 /* If we get here, we're ok, so lets start reading some data */
2036 comm_setselect(fd, COMM_SELECT_READ, read_packet, client_p, 0);
2037 }
2038
2039 void
2040 cryptlink_error(struct Client *client_p, const char *type,
2041 const char *reason, const char *client_reason)
2042 {
2043 sendto_realops_flags(UMODE_ALL, L_ADMIN, "%s: CRYPTLINK %s error - %s",
2044 get_client_name(client_p, SHOW_IP), type, reason);
2045 sendto_realops_flags(UMODE_ALL, L_OPER, "%s: CRYPTLINK %s error - %s",
2046 get_client_name(client_p, MASK_IP), type, reason);
2047 ilog(L_ERROR, "%s: CRYPTLINK %s error - %s",
2048 get_client_name(client_p, SHOW_IP), type, reason);
2049
2050 /* If client_reason isn't NULL, then exit the client with the message
2051 * defined in the call.
2052 */
2053 if ((client_reason != NULL) && (!IsDead(client_p)))
2054 exit_client(client_p, &me, client_reason);
2055 }
2056
2057 static char base64_chars[] =
2058 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
2059
2060 static char base64_values[] =
2061 {
2062 /* 00-15 */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
2063 /* 16-31 */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
2064 /* 32-47 */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63,
2065 /* 48-63 */ 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, 0, -1, -1,
2066 /* 64-79 */ -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
2067 /* 80-95 */ 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1,
2068 /* 96-111 */ -1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
2069 /* 112-127 */ 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1,
2070 /* 128-143 */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
2071 /* 144-159 */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
2072 /* 160-175 */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
2073 /* 186-191 */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
2074 /* 192-207 */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
2075 /* 208-223 */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
2076 /* 224-239 */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
2077 /* 240-255 */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1
2078 };
2079
2080 /*
2081 * base64_block will allocate and return a new block of memory
2082 * using MyMalloc(). It should be freed after use.
2083 */
2084 int
2085 base64_block(unsigned char **output, char *data, int len)
2086 {
2087 unsigned char *out;
2088 unsigned char *in = (unsigned char*)data;
2089 unsigned long int q_in;
2090 int i;
2091 int count = 0;
2092
2093 out = MyMalloc(((((len + 2) - ((len + 2) % 3)) / 3) * 4) + 1);
2094
2095 /* process 24 bits at a time */
2096 for( i = 0; i < len; i += 3)
2097 {
2098 q_in = 0;
2099
2100 if ( i + 2 < len )
2101 {
2102 q_in = (in[i+2] & 0xc0) << 2;
2103 q_in |= in[i+2];
2104 }
2105
2106 if ( i + 1 < len )
2107 {
2108 q_in |= (in[i+1] & 0x0f) << 10;
2109 q_in |= (in[i+1] & 0xf0) << 12;
2110 }
2111
2112 q_in |= (in[i] & 0x03) << 20;
2113 q_in |= in[i] << 22;
2114
2115 q_in &= 0x3f3f3f3f;
2116
2117 out[count++] = base64_chars[((q_in >> 24) )];
2118 out[count++] = base64_chars[((q_in >> 16) & 0xff)];
2119 out[count++] = base64_chars[((q_in >> 8) & 0xff)];
2120 out[count++] = base64_chars[((q_in ) & 0xff)];
2121 }
2122 if ( (i - len) > 0 )
2123 {
2124 out[count-1] = '=';
2125 if ( (i - len) > 1 )
2126 out[count-2] = '=';
2127 }
2128
2129 out[count] = '\0';
2130 *output = out;
2131 return (count);
2132 }
2133
2134 /*
2135 * unbase64_block will allocate and return a new block of memory
2136 * using MyMalloc(). It should be freed after use.
2137 */
2138 int
2139 unbase64_block(unsigned char **output, char *data, int len)
2140 {
2141 unsigned char *out;
2142 unsigned char *in = (unsigned char*)data;
2143 unsigned long int q_in;
2144 int i;
2145 int count = 0;
2146
2147 if ((len % 4) != 0)
2148 return (0);
2149
2150 out = MyMalloc(((len / 4) * 3) + 1);
2151
2152 /* process 32 bits at a time */
2153 for( i = 0; (i + 3) < len; i+=4)
2154 {
2155 /* compress input (chars a, b, c and d) as follows:
2156 * (after converting ascii -> base64 value)
2157 *
2158 * |00000000aaaaaabbbbbbccccccdddddd|
2159 * | 765432 107654 321076 543210|
2160 */
2161
2162 q_in = 0;
2163
2164 if (base64_values[in[i+3]] > -1)
2165 q_in |= base64_values[in[i+3]] ;
2166 if (base64_values[in[i+2]] > -1)
2167 q_in |= base64_values[in[i+2]] << 6;
2168 if (base64_values[in[i+1]] > -1)
2169 q_in |= base64_values[in[i+1]] << 12;
2170 if (base64_values[in[i ]] > -1)
2171 q_in |= base64_values[in[i ]] << 18;
2172
2173 out[count++] = (q_in >> 16) & 0xff;
2174 out[count++] = (q_in >> 8) & 0xff;
2175 out[count++] = (q_in ) & 0xff;
2176 }
2177
2178 if (in[i-1] == '=') count--;
2179 if (in[i-2] == '=') count--;
2180
2181 out[count] = '\0';
2182 *output = out;
2183 return (count);
2184 }
2185
2186 #endif /* HAVE_LIBCRYPTO */
2187

Properties

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