/[svn]/ircd-hybrid-7.2/src/s_serv.c
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Contents of /ircd-hybrid-7.2/src/s_serv.c

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Revision 896 - (show annotations)
Sat Nov 3 08:54:09 2007 UTC (12 years, 1 month ago) by michael
File MIME type: text/x-chdr
File size: 62590 byte(s)
- Killed s_stats.c

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_user.h"
54 #include "send.h"
55 #include "memory.h"
56 #include "channel.h" /* chcap_usage_counts stuff...*/
57
58 #define MIN_CONN_FREQ 300
59
60 static dlink_list cap_list = { NULL, NULL, 0 };
61 static void server_burst(struct Client *);
62 static int fork_server(struct Client *);
63 static void burst_all(struct Client *);
64 static void send_tb(struct Client *client_p, struct Channel *chptr);
65
66 static CNCB serv_connect_callback;
67
68 static void start_io(struct Client *);
69 static void burst_members(struct Client *, struct Channel *);
70
71 static SlinkRplHnd slink_error;
72 static SlinkRplHnd slink_zipstats;
73
74
75 #ifdef HAVE_LIBCRYPTO
76 struct EncCapability CipherTable[] =
77 {
78 #ifdef HAVE_EVP_BF_CFB
79 { "BF/168", CAP_ENC_BF_168, 24, CIPHER_BF },
80 { "BF/128", CAP_ENC_BF_128, 16, CIPHER_BF },
81 #endif
82 #ifdef HAVE_EVP_CAST5_CFB
83 { "CAST/128", CAP_ENC_CAST_128, 16, CIPHER_CAST },
84 #endif
85 #ifdef HAVE_EVP_IDEA_CFB
86 { "IDEA/128", CAP_ENC_IDEA_128, 16, CIPHER_IDEA },
87 #endif
88 #ifdef HAVE_EVP_RC5_32_12_16_CFB
89 { "RC5.16/128", CAP_ENC_RC5_16_128, 16, CIPHER_RC5_16 },
90 { "RC5.12/128", CAP_ENC_RC5_12_128, 16, CIPHER_RC5_12 },
91 { "RC5.8/128", CAP_ENC_RC5_8_128, 16, CIPHER_RC5_8 },
92 #endif
93 #ifdef HAVE_EVP_DES_EDE3_CFB
94 { "3DES/168", CAP_ENC_3DES_168, 24, CIPHER_3DES },
95 #endif
96 #ifdef HAVE_EVP_DES_CFB
97 { "DES/56", CAP_ENC_DES_56, 8, CIPHER_DES },
98 #endif
99 { 0, 0, 0, 0 }
100 };
101 #endif
102
103 struct SlinkRplDef slinkrpltab[] = {
104 { SLINKRPL_ERROR, slink_error, SLINKRPL_FLAG_DATA },
105 { SLINKRPL_ZIPSTATS, slink_zipstats, SLINKRPL_FLAG_DATA },
106 { 0, 0, 0 },
107 };
108
109
110 void
111 slink_error(unsigned int rpl, unsigned int len, unsigned char *data,
112 struct Client *server_p)
113 {
114 assert(rpl == SLINKRPL_ERROR);
115 assert(len < 256);
116
117 data[len-1] = '\0';
118
119 sendto_realops_flags(UMODE_ALL, L_ALL, "SlinkError for %s: %s",
120 server_p->name, data);
121 /* XXX should this be exit_client? */
122 exit_client(server_p, &me, "servlink error -- terminating link");
123 }
124
125 void
126 slink_zipstats(unsigned int rpl, unsigned int len, unsigned char *data,
127 struct Client *server_p)
128 {
129 struct ZipStats zipstats;
130 unsigned long in = 0, in_wire = 0, out = 0, out_wire = 0;
131 int i = 0;
132
133 assert(rpl == SLINKRPL_ZIPSTATS);
134 assert(len == 16);
135 assert(IsCapable(server_p, CAP_ZIP));
136
137 /* Yes, it needs to be done this way, no we cannot let the compiler
138 * work with the pointer to the structure. This works around a GCC
139 * bug on SPARC that affects all versions at the time of this writing.
140 * I will feed you to the creatures living in RMS's beard if you do
141 * not leave this as is, without being sure that you are not causing
142 * regression for most of our installed SPARC base.
143 * -jmallett, 04/27/2002
144 */
145 memcpy(&zipstats, &server_p->localClient->zipstats, sizeof(struct ZipStats));
146
147 in |= (data[i++] << 24);
148 in |= (data[i++] << 16);
149 in |= (data[i++] << 8);
150 in |= (data[i++] );
151
152 in_wire |= (data[i++] << 24);
153 in_wire |= (data[i++] << 16);
154 in_wire |= (data[i++] << 8);
155 in_wire |= (data[i++] );
156
157 out |= (data[i++] << 24);
158 out |= (data[i++] << 16);
159 out |= (data[i++] << 8);
160 out |= (data[i++] );
161
162 out_wire |= (data[i++] << 24);
163 out_wire |= (data[i++] << 16);
164 out_wire |= (data[i++] << 8);
165 out_wire |= (data[i++] );
166
167 /* This macro adds b to a if a plus b is not an overflow, and sets the
168 * value of a to b if it is.
169 * Add and Set if No Overflow.
170 */
171 #define ASNO(a, b) a = (a + b >= a ? a + b : b)
172
173 ASNO(zipstats.in, in);
174 ASNO(zipstats.out, out);
175 ASNO(zipstats.in_wire, in_wire);
176 ASNO(zipstats.out_wire, out_wire);
177
178 if (zipstats.in > 0)
179 zipstats.in_ratio = (((double)(zipstats.in - zipstats.in_wire) /
180 (double)zipstats.in) * 100.00);
181 else
182 zipstats.in_ratio = 0;
183
184 if (zipstats.out > 0)
185 zipstats.out_ratio = (((double)(zipstats.out - zipstats.out_wire) /
186 (double)zipstats.out) * 100.00);
187 else
188 zipstats.out_ratio = 0;
189
190 memcpy(&server_p->localClient->zipstats, &zipstats, sizeof (struct ZipStats));
191 }
192
193 void
194 collect_zipstats(void *unused)
195 {
196 dlink_node *ptr;
197 struct Client *target_p;
198
199 DLINK_FOREACH(ptr, serv_list.head)
200 {
201 target_p = ptr->data;
202
203 if (IsCapable(target_p, CAP_ZIP))
204 {
205 /* only bother if we haven't already got something queued... */
206 if (!target_p->localClient->slinkq)
207 {
208 target_p->localClient->slinkq = MyMalloc(1); /* sigh.. */
209 target_p->localClient->slinkq[0] = SLINKCMD_ZIPSTATS;
210 target_p->localClient->slinkq_ofs = 0;
211 target_p->localClient->slinkq_len = 1;
212 send_queued_slink_write(target_p);
213 }
214 }
215 }
216 }
217
218 #ifdef HAVE_LIBCRYPTO
219 struct EncCapability *
220 check_cipher(struct Client *client_p, struct AccessItem *aconf)
221 {
222 struct EncCapability *epref = NULL;
223
224 /* Use connect{} specific info if available */
225 if (aconf->cipher_preference)
226 epref = aconf->cipher_preference;
227 else if (ConfigFileEntry.default_cipher_preference)
228 epref = ConfigFileEntry.default_cipher_preference;
229
230 /*
231 * If the server supports the capability in hand, return the matching
232 * conf struct. Otherwise, return NULL (an error).
233 */
234 if (epref && IsCapableEnc(client_p, epref->cap))
235 return epref;
236
237 return NULL;
238 }
239 #endif /* HAVE_LIBCRYPTO */
240
241 /* my_name_for_link()
242 * return wildcard name of my server name
243 * according to given config entry --Jto
244 */
245 const char *
246 my_name_for_link(struct ConfItem *conf)
247 {
248 struct AccessItem *aconf;
249
250 aconf = (struct AccessItem *)map_to_conf(conf);
251 if (aconf->fakename != NULL)
252 return aconf->fakename;
253 else
254 return me.name;
255 }
256
257 /*
258 * write_links_file
259 *
260 * inputs - void pointer which is not used
261 * output - NONE
262 * side effects - called from an event, write out list of linked servers
263 * but in no particular order.
264 */
265 void
266 write_links_file(void* notused)
267 {
268 MessageFileLine *next_mptr = 0;
269 MessageFileLine *mptr = 0;
270 MessageFileLine *currentMessageLine = 0;
271 MessageFileLine *newMessageLine = 0;
272 MessageFile *MessageFileptr;
273 const char *p;
274 FBFILE *file;
275 char buff[512];
276 dlink_node *ptr;
277
278 MessageFileptr = &ConfigFileEntry.linksfile;
279
280 if ((file = fbopen(MessageFileptr->fileName, "w")) == NULL)
281 return;
282
283 for (mptr = MessageFileptr->contentsOfFile; mptr; mptr = next_mptr)
284 {
285 next_mptr = mptr->next;
286 MyFree(mptr);
287 }
288
289 MessageFileptr->contentsOfFile = NULL;
290 currentMessageLine = NULL;
291
292 DLINK_FOREACH(ptr, global_serv_list.head)
293 {
294 size_t nbytes = 0;
295 struct Client *target_p = ptr->data;
296
297 /* skip ourselves, we send ourselves in /links */
298 if (IsMe(target_p))
299 continue;
300
301 /* skip hidden servers */
302 if (IsHidden(target_p) && !ConfigServerHide.disable_hidden)
303 continue;
304
305 if (target_p->info[0])
306 p = target_p->info;
307 else
308 p = "(Unknown Location)";
309
310 newMessageLine = MyMalloc(sizeof(MessageFileLine));
311
312 /* Attempt to format the file in such a way it follows the usual links output
313 * ie "servername uplink :hops info"
314 * Mostly for aesthetic reasons - makes it look pretty in mIRC ;)
315 * - madmax
316 */
317
318 /*
319 * For now, check this ircsprintf wont overflow - it shouldnt on a
320 * default config but it is configurable..
321 * This should be changed to an snprintf at some point, but I'm wanting to
322 * know if this is a cause of a bug - cryogen
323 */
324 assert(strlen(target_p->name) + strlen(me.name) + 6 + strlen(p) <=
325 MESSAGELINELEN);
326 ircsprintf(newMessageLine->line, "%s %s :1 %s",
327 target_p->name, me.name, p);
328 newMessageLine->next = NULL;
329
330 if (MessageFileptr->contentsOfFile)
331 {
332 if (currentMessageLine)
333 currentMessageLine->next = newMessageLine;
334 currentMessageLine = newMessageLine;
335 }
336 else
337 {
338 MessageFileptr->contentsOfFile = newMessageLine;
339 currentMessageLine = newMessageLine;
340 }
341
342 nbytes = ircsprintf(buff, "%s %s :1 %s\n", target_p->name, me.name, p);
343 fbputs(buff, file, nbytes);
344 }
345
346 fbclose(file);
347 }
348
349 /* hunt_server()
350 * Do the basic thing in delivering the message (command)
351 * across the relays to the specific server (server) for
352 * actions.
353 *
354 * Note: The command is a format string and *MUST* be
355 * of prefixed style (e.g. ":%s COMMAND %s ...").
356 * Command can have only max 8 parameters.
357 *
358 * server parv[server] is the parameter identifying the
359 * target server.
360 *
361 * *WARNING*
362 * parv[server] is replaced with the pointer to the
363 * real servername from the matched client (I'm lazy
364 * now --msa).
365 *
366 * returns: (see #defines)
367 */
368 int
369 hunt_server(struct Client *client_p, struct Client *source_p, const char *command,
370 int server, int parc, char *parv[])
371 {
372 struct Client *target_p = NULL;
373 struct Client *target_tmp = NULL;
374 dlink_node *ptr;
375 int wilds;
376
377 /* Assume it's me, if no server
378 */
379 if (parc <= server || EmptyString(parv[server]) ||
380 match(me.name, parv[server]) ||
381 match(parv[server], me.name) ||
382 !strcmp(parv[server], me.id))
383 return(HUNTED_ISME);
384
385 /* These are to pickup matches that would cause the following
386 * message to go in the wrong direction while doing quick fast
387 * non-matching lookups.
388 */
389 if (MyClient(source_p))
390 target_p = find_client(parv[server]);
391 else
392 target_p = find_person(client_p, parv[server]);
393
394 if (target_p)
395 if (target_p->from == source_p->from && !MyConnect(target_p))
396 target_p = NULL;
397
398 if (target_p == NULL && (target_p = find_server(parv[server])))
399 if (target_p->from == source_p->from && !MyConnect(target_p))
400 target_p = NULL;
401
402 collapse(parv[server]);
403 wilds = (strchr(parv[server], '?') || strchr(parv[server], '*'));
404
405 /* Again, if there are no wild cards involved in the server
406 * name, use the hash lookup
407 */
408 if (target_p == NULL)
409 {
410 if (!wilds)
411 {
412 if (!(target_p = find_server(parv[server])))
413 {
414 sendto_one(source_p, form_str(ERR_NOSUCHSERVER),
415 me.name, parv[0], parv[server]);
416 return(HUNTED_NOSUCH);
417 }
418 }
419 else
420 {
421 DLINK_FOREACH(ptr, global_client_list.head)
422 {
423 target_tmp = ptr->data;
424
425 if (match(parv[server], target_tmp->name))
426 {
427 if (target_tmp->from == source_p->from && !MyConnect(target_tmp))
428 continue;
429 target_p = ptr->data;
430
431 if (IsRegistered(target_p) && (target_p != client_p))
432 break;
433 }
434 }
435 }
436 }
437
438 if (target_p != NULL)
439 {
440 if(!IsRegistered(target_p))
441 {
442 sendto_one(source_p, form_str(ERR_NOSUCHSERVER),
443 me.name, parv[0], parv[server]);
444 return HUNTED_NOSUCH;
445 }
446
447 if (IsMe(target_p) || MyClient(target_p))
448 return HUNTED_ISME;
449
450 if (!match(target_p->name, parv[server]))
451 parv[server] = target_p->name;
452
453 /* This is a little kludgy but should work... */
454 if (IsClient(source_p) &&
455 ((MyConnect(target_p) && IsCapable(target_p, CAP_TS6)) ||
456 (!MyConnect(target_p) && IsCapable(target_p->from, CAP_TS6))))
457 parv[0] = ID(source_p);
458
459 sendto_one(target_p, command, parv[0],
460 parv[1], parv[2], parv[3], parv[4],
461 parv[5], parv[6], parv[7], parv[8]);
462 return(HUNTED_PASS);
463 }
464
465 sendto_one(source_p, form_str(ERR_NOSUCHSERVER),
466 me.name, parv[0], parv[server]);
467 return(HUNTED_NOSUCH);
468 }
469
470 /* try_connections()
471 *
472 * inputs - void pointer which is not used
473 * output - NONE
474 * side effects -
475 * scan through configuration and try new connections.
476 * Returns the calendar time when the next call to this
477 * function should be made latest. (No harm done if this
478 * is called earlier or later...)
479 */
480 void
481 try_connections(void *unused)
482 {
483 dlink_node *ptr;
484 struct ConfItem *conf;
485 struct AccessItem *aconf;
486 struct ClassItem *cltmp;
487 int confrq;
488
489 /* TODO: change this to set active flag to 0 when added to event! --Habeeb */
490 if (GlobalSetOptions.autoconn == 0)
491 return;
492
493 DLINK_FOREACH(ptr, server_items.head)
494 {
495 conf = ptr->data;
496 aconf = (struct AccessItem *)map_to_conf(conf);
497
498 /* Also when already connecting! (update holdtimes) --SRB
499 */
500 if (!(aconf->status & CONF_SERVER) || aconf->port <= 0 ||
501 !(IsConfAllowAutoConn(aconf)))
502 continue;
503
504 cltmp = (struct ClassItem *)map_to_conf(aconf->class_ptr);
505
506 /* Skip this entry if the use of it is still on hold until
507 * future. Otherwise handle this entry (and set it on hold
508 * until next time). Will reset only hold times, if already
509 * made one successfull connection... [this algorithm is
510 * a bit fuzzy... -- msa >;) ]
511 */
512 if (aconf->hold > CurrentTime)
513 continue;
514
515 if (cltmp == NULL)
516 confrq = DEFAULT_CONNECTFREQUENCY;
517 else
518 {
519 confrq = ConFreq(cltmp);
520 if (confrq < MIN_CONN_FREQ )
521 confrq = MIN_CONN_FREQ;
522 }
523
524 aconf->hold = CurrentTime + confrq;
525
526 /* Found a CONNECT config with port specified, scan clients
527 * and see if this server is already connected?
528 */
529 if (find_server(conf->name) != NULL)
530 continue;
531
532 if (CurrUserCount(cltmp) < MaxTotal(cltmp))
533 {
534 /* Go to the end of the list, if not already last */
535 if (ptr->next != NULL)
536 {
537 dlinkDelete(ptr, &server_items);
538 dlinkAddTail(conf, &conf->node, &server_items);
539 }
540
541 if (find_servconn_in_progress(conf->name))
542 return;
543
544 /* We used to only print this if serv_connect() actually
545 * succeeded, but since comm_tcp_connect() can call the callback
546 * immediately if there is an error, we were getting error messages
547 * in the wrong order. SO, we just print out the activated line,
548 * and let serv_connect() / serv_connect_callback() print an
549 * error afterwards if it fails.
550 * -- adrian
551 */
552 if (ConfigServerHide.hide_server_ips)
553 sendto_realops_flags(UMODE_ALL, L_ALL, "Connection to %s activated.",
554 conf->name);
555 else
556 sendto_realops_flags(UMODE_ALL, L_ALL, "Connection to %s[%s] activated.",
557 conf->name, aconf->host);
558
559 serv_connect(aconf, NULL);
560 /* We connect only one at time... */
561 return;
562 }
563 }
564 }
565
566 int
567 check_server(const char *name, struct Client *client_p, int cryptlink)
568 {
569 dlink_node *ptr;
570 struct ConfItem *conf = NULL;
571 struct ConfItem *server_conf = NULL;
572 struct AccessItem *server_aconf = NULL;
573 struct AccessItem *aconf = NULL;
574 int error = -1;
575
576 assert(client_p != NULL);
577
578 if (client_p == NULL)
579 return(error);
580
581 if (strlen(name) > HOSTLEN)
582 return(-4);
583
584 /* loop through looking for all possible connect items that might work */
585 DLINK_FOREACH(ptr, server_items.head)
586 {
587 conf = ptr->data;
588 aconf = (struct AccessItem *)map_to_conf(conf);
589
590 if (!match(name, conf->name))
591 continue;
592
593 error = -3;
594
595 /* XXX: Fix me for IPv6 */
596 /* XXX sockhost is the IPv4 ip as a string */
597 if (match(aconf->host, client_p->host) ||
598 match(aconf->host, client_p->sockhost))
599 {
600 error = -2;
601 #ifdef HAVE_LIBCRYPTO
602 if (cryptlink && IsConfCryptLink(aconf))
603 {
604 if (aconf->rsa_public_key)
605 server_conf = conf;
606 }
607 else if (!(cryptlink || IsConfCryptLink(aconf)))
608 #endif /* HAVE_LIBCRYPTO */
609 {
610 /* A NULL password is as good as a bad one */
611 if (EmptyString(client_p->localClient->passwd))
612 return(-2);
613
614 /* code in s_conf.c should not have allowed this to be NULL */
615 if (aconf->passwd == NULL)
616 return(-2);
617
618 if (IsConfEncrypted(aconf))
619 {
620 if (strcmp(aconf->passwd,
621 (const char *)crypt(client_p->localClient->passwd,
622 aconf->passwd)) == 0)
623 server_conf = conf;
624 }
625 else
626 {
627 if (strcmp(aconf->passwd, client_p->localClient->passwd) == 0)
628 server_conf = conf;
629 }
630 }
631 }
632 }
633
634 if (server_conf == NULL)
635 return(error);
636
637 attach_conf(client_p, server_conf);
638
639 /* Now find all leaf or hub config items for this server */
640 DLINK_FOREACH(ptr, hub_items.head)
641 {
642 conf = ptr->data;
643
644 if (!match(name, conf->name))
645 continue;
646 attach_conf(client_p, conf);
647 }
648
649 DLINK_FOREACH(ptr, leaf_items.head)
650 {
651 conf = ptr->data;
652
653 if (!match(name, conf->name))
654 continue;
655 attach_conf(client_p, conf);
656 }
657
658 server_aconf = map_to_conf(server_conf);
659
660 #ifdef HAVE_LIBZ /* otherwise, clear it unconditionally */
661 if (!IsConfCompressed(server_aconf))
662 #endif
663 ClearCap(client_p, CAP_ZIP);
664 if (!IsConfCryptLink(server_aconf))
665 ClearCap(client_p, CAP_ENC);
666 if (!IsConfTopicBurst(server_aconf))
667 {
668 ClearCap(client_p, CAP_TB);
669 ClearCap(client_p, CAP_TBURST);
670 }
671
672 /* Don't unset CAP_HUB here even if the server isn't a hub,
673 * it only indicates if the server thinks it's lazylinks are
674 * leafs or not.. if you unset it, bad things will happen
675 */
676 if (aconf != NULL)
677 {
678 struct sockaddr_in *v4;
679 #ifdef IPV6
680 struct sockaddr_in6 *v6;
681 #endif
682 switch (aconf->aftype)
683 {
684 #ifdef IPV6
685 case AF_INET6:
686 v6 = (struct sockaddr_in6 *)&aconf->ipnum;
687
688 if (IN6_IS_ADDR_UNSPECIFIED(&v6->sin6_addr))
689 memcpy(&aconf->ipnum, &client_p->localClient->ip, sizeof(struct irc_ssaddr));
690 break;
691 #endif
692 case AF_INET:
693 v4 = (struct sockaddr_in *)&aconf->ipnum;
694
695 if (v4->sin_addr.s_addr == INADDR_NONE)
696 memcpy(&aconf->ipnum, &client_p->localClient->ip, sizeof(struct irc_ssaddr));
697 break;
698 }
699 }
700
701 return(0);
702 }
703
704 /* add_capability()
705 *
706 * inputs - string name of CAPAB
707 * - int flag of capability
708 * output - NONE
709 * side effects - Adds given capability name and bit mask to
710 * current supported capabilities. This allows
711 * modules to dynamically add or subtract their capability.
712 */
713 void
714 add_capability(const char *capab_name, int cap_flag, int add_to_default)
715 {
716 struct Capability *cap = MyMalloc(sizeof(*cap));
717
718 DupString(cap->name, capab_name);
719 cap->cap = cap_flag;
720 dlinkAdd(cap, &cap->node, &cap_list);
721
722 if (add_to_default)
723 default_server_capabs |= cap_flag;
724 }
725
726 /* delete_capability()
727 *
728 * inputs - string name of CAPAB
729 * output - NONE
730 * side effects - delete given capability from ones known.
731 */
732 int
733 delete_capability(const char *capab_name)
734 {
735 dlink_node *ptr;
736 dlink_node *next_ptr;
737 struct Capability *cap;
738
739 DLINK_FOREACH_SAFE(ptr, next_ptr, cap_list.head)
740 {
741 cap = ptr->data;
742
743 if (cap->cap != 0)
744 {
745 if (irccmp(cap->name, capab_name) == 0)
746 {
747 default_server_capabs &= ~(cap->cap);
748 dlinkDelete(ptr, &cap_list);
749 MyFree(cap->name);
750 cap->name = NULL;
751 MyFree(cap);
752 }
753 }
754 }
755
756 return 0;
757 }
758
759 /*
760 * find_capability()
761 *
762 * inputs - string name of capab to find
763 * output - 0 if not found CAPAB otherwise
764 * side effects - none
765 */
766 int
767 find_capability(const char *capab)
768 {
769 const dlink_node *ptr = NULL;
770
771 DLINK_FOREACH(ptr, cap_list.head)
772 {
773 const struct Capability *cap = ptr->data;
774
775 if (cap->cap && !irccmp(cap->name, capab))
776 return cap->cap;
777 }
778
779 return 0;
780 }
781
782 /* send_capabilities()
783 *
784 * inputs - Client pointer to send to
785 * - Pointer to AccessItem (for crypt)
786 * - int flag of capabilities that this server can send
787 * - int flag of encryption capabilities
788 * output - NONE
789 * side effects - send the CAPAB line to a server -orabidoo
790 *
791 */
792 void
793 send_capabilities(struct Client *client_p, struct AccessItem *aconf,
794 int cap_can_send, int enc_can_send)
795 {
796 struct Capability *cap=NULL;
797 char msgbuf[IRCD_BUFSIZE];
798 char *t;
799 int tl;
800 dlink_node *ptr;
801 #ifdef HAVE_LIBCRYPTO
802 const struct EncCapability *epref = NULL;
803 char *capend;
804 int sent_cipher = 0;
805 #endif
806
807 t = msgbuf;
808
809 DLINK_FOREACH(ptr, cap_list.head)
810 {
811 cap = ptr->data;
812
813 if (cap->cap & (cap_can_send|default_server_capabs))
814 {
815 tl = ircsprintf(t, "%s ", cap->name);
816 t += tl;
817 }
818 }
819 #ifdef HAVE_LIBCRYPTO
820 if (enc_can_send)
821 {
822 capend = t;
823 strcpy(t, "ENC:");
824 t += 4;
825
826 /* use connect{} specific info if available */
827 if (aconf->cipher_preference)
828 epref = aconf->cipher_preference;
829 else if (ConfigFileEntry.default_cipher_preference)
830 epref = ConfigFileEntry.default_cipher_preference;
831
832 if (epref && (epref->cap & enc_can_send))
833 {
834 /* Leave the space -- it is removed later. */
835 tl = ircsprintf(t, "%s ", epref->name);
836 t += tl;
837 sent_cipher = 1;
838 }
839
840 if (!sent_cipher)
841 t = capend; /* truncate string before ENC:, below */
842 }
843 #endif
844 *(t - 1) = '\0';
845 sendto_one(client_p, "CAPAB :%s", msgbuf);
846 }
847
848 /* sendnick_TS()
849 *
850 * inputs - client (server) to send nick towards
851 * - client to send nick for
852 * output - NONE
853 * side effects - NICK message is sent towards given client_p
854 */
855 void
856 sendnick_TS(struct Client *client_p, struct Client *target_p)
857 {
858 static char ubuf[12];
859
860 if (!IsClient(target_p))
861 return;
862
863 send_umode(NULL, target_p, 0, IsOperHiddenAdmin(target_p) ?
864 SEND_UMODES & ~UMODE_ADMIN : SEND_UMODES, ubuf);
865
866 if (ubuf[0] == '\0')
867 {
868 ubuf[0] = '+';
869 ubuf[1] = '\0';
870 }
871
872 /* XXX Both of these need to have a :me.name or :mySID!?!?! */
873 if (HasID(target_p) && IsCapable(client_p, CAP_TS6))
874 sendto_one(client_p, ":%s UID %s %d %lu %s %s %s %s %s :%s",
875 target_p->servptr->id,
876 target_p->name, target_p->hopcount + 1,
877 (unsigned long) target_p->tsinfo,
878 ubuf, target_p->username, target_p->host,
879 (MyClient(target_p) && IsIPSpoof(target_p)) ?
880 "0" : target_p->sockhost, target_p->id, target_p->info);
881 else
882 sendto_one(client_p, "NICK %s %d %lu %s %s %s %s :%s",
883 target_p->name, target_p->hopcount + 1,
884 (unsigned long) target_p->tsinfo,
885 ubuf, target_p->username, target_p->host,
886 target_p->servptr->name, target_p->info);
887
888 if (IsConfAwayBurst((struct AccessItem *)map_to_conf(client_p->serv->sconf)))
889 if (!EmptyString(target_p->away))
890 sendto_one(client_p, ":%s AWAY :%s", target_p->name,
891 target_p->away);
892
893 }
894
895 /*
896 * show_capabilities - show current server capabilities
897 *
898 * inputs - pointer to a struct Client
899 * output - pointer to static string
900 * side effects - build up string representing capabilities of server listed
901 */
902 const char *
903 show_capabilities(struct Client *target_p)
904 {
905 static char msgbuf[IRCD_BUFSIZE];
906 char *t = msgbuf;
907 dlink_node *ptr;
908
909 t += ircsprintf(msgbuf, "TS ");
910
911 DLINK_FOREACH(ptr, cap_list.head)
912 {
913 const struct Capability *cap = ptr->data;
914
915 if (IsCapable(target_p, cap->cap))
916 t += ircsprintf(t, "%s ", cap->name);
917 }
918 #ifdef HAVE_LIBCRYPTO
919 if (IsCapable(target_p, CAP_ENC) &&
920 target_p->localClient->in_cipher &&
921 target_p->localClient->out_cipher)
922 t += ircsprintf(t, "ENC:%s ",
923 target_p->localClient->in_cipher->name);
924 #endif
925 *(t - 1) = '\0';
926
927 return(msgbuf);
928 }
929
930 /* make_server()
931 *
932 * inputs - pointer to client struct
933 * output - pointer to struct Server
934 * side effects - add's an Server information block to a client
935 * if it was not previously allocated.
936 */
937 struct Server *
938 make_server(struct Client *client_p)
939 {
940 if (client_p->serv == NULL)
941 client_p->serv = MyMalloc(sizeof(struct Server));
942
943 return client_p->serv;
944 }
945
946 /* server_estab()
947 *
948 * inputs - pointer to a struct Client
949 * output -
950 * side effects -
951 */
952 void
953 server_estab(struct Client *client_p)
954 {
955 struct Client *target_p;
956 struct ConfItem *conf;
957 struct AccessItem *aconf=NULL;
958 char *host;
959 const char *inpath;
960 static char inpath_ip[HOSTLEN * 2 + USERLEN + 6];
961 dlink_node *m;
962 dlink_node *ptr;
963
964 assert(client_p != NULL);
965
966 strlcpy(inpath_ip, get_client_name(client_p, SHOW_IP), sizeof(inpath_ip));
967
968 inpath = get_client_name(client_p, MASK_IP); /* "refresh" inpath with host */
969 host = client_p->name;
970
971 if ((conf = find_conf_name(&client_p->localClient->confs, host, SERVER_TYPE))
972 == NULL)
973 {
974 /* This shouldn't happen, better tell the ops... -A1kmm */
975 sendto_realops_flags(UMODE_ALL, L_ALL, "Warning: Lost connect{} block "
976 "for server %s(this shouldn't happen)!", host);
977 exit_client(client_p, &me, "Lost connect{} block!");
978 return;
979 }
980
981 MyFree(client_p->localClient->passwd);
982 client_p->localClient->passwd = NULL;
983
984 /* Its got identd, since its a server */
985 SetGotId(client_p);
986
987 /* If there is something in the serv_list, it might be this
988 * connecting server..
989 */
990 if (!ServerInfo.hub && serv_list.head)
991 {
992 if (client_p != serv_list.head->data || serv_list.head->next)
993 {
994 ++ServerStats.is_ref;
995 sendto_one(client_p, "ERROR :I'm a leaf not a hub");
996 exit_client(client_p, &me, "I'm a leaf");
997 return;
998 }
999 }
1000
1001 aconf = (struct AccessItem *)map_to_conf(conf);
1002
1003 if (IsUnknown(client_p) && !IsConfCryptLink(aconf))
1004 {
1005 /* jdc -- 1. Use EmptyString(), not [0] index reference.
1006 * 2. Check aconf->spasswd, not aconf->passwd.
1007 */
1008 if (!EmptyString(aconf->spasswd))
1009 {
1010 /* only send ts6 format PASS if we have ts6 enabled */
1011 if (me.id[0] != '\0') /* Send TS 6 form only if id */
1012 sendto_one(client_p, "PASS %s TS %d %s",
1013 aconf->spasswd, TS_CURRENT, me.id);
1014 else
1015 sendto_one(client_p, "PASS %s TS 5",
1016 aconf->spasswd);
1017 }
1018
1019 /* Pass my info to the new server
1020 *
1021 * If this is a HUB, pass on CAP_HUB
1022 * Pass on ZIP if supported
1023 * Pass on TB if supported.
1024 * - Dianora
1025 */
1026
1027 send_capabilities(client_p, aconf, (ServerInfo.hub ? CAP_HUB : 0)
1028 | (IsConfCompressed(aconf) ? CAP_ZIP : 0)
1029 | (IsConfTopicBurst(aconf) ? CAP_TBURST|CAP_TB : 0), 0);
1030
1031 /* SERVER is the last command sent before switching to ziplinks.
1032 * We set TCPNODELAY on the socket to make sure it gets sent out
1033 * on the wire immediately. Otherwise, it could be sitting in
1034 * a kernel buffer when we start sending zipped data, and the
1035 * parser on the receiving side can't hand both unzipped and zipped
1036 * data in one packet. --Rodder
1037 *
1038 * currently we only need to call send_queued_write,
1039 * Nagle is already disabled at this point --adx
1040 */
1041 sendto_one(client_p, "SERVER %s 1 :%s%s",
1042 my_name_for_link(conf),
1043 ConfigServerHide.hidden ? "(H) " : "",
1044 (me.info[0]) ? (me.info) : "IRCers United");
1045 send_queued_write(client_p);
1046 }
1047
1048 /* Hand the server off to servlink now */
1049 if (IsCapable(client_p, CAP_ENC) || IsCapable(client_p, CAP_ZIP))
1050 {
1051 if (fork_server(client_p) < 0)
1052 {
1053 sendto_realops_flags(UMODE_ALL, L_ADMIN,
1054 "Warning: fork failed for server %s -- check servlink_path (%s)",
1055 get_client_name(client_p, HIDE_IP), ConfigFileEntry.servlink_path);
1056 sendto_realops_flags(UMODE_ALL, L_OPER, "Warning: fork failed for server "
1057 "%s -- check servlink_path (%s)",
1058 get_client_name(client_p, MASK_IP),
1059 ConfigFileEntry.servlink_path);
1060 exit_client(client_p, &me, "fork failed");
1061 return;
1062 }
1063
1064 start_io(client_p);
1065 SetServlink(client_p);
1066 }
1067
1068 /* only send ts6 format SVINFO if we have ts6 enabled */
1069 sendto_one(client_p, "SVINFO %d %d 0 :%lu",
1070 (me.id[0] ? TS_CURRENT : 5), TS_MIN,
1071 (unsigned long)CurrentTime);
1072
1073 /* assumption here is if they passed the correct TS version, they also passed an SID */
1074 if (IsCapable(client_p, CAP_TS6))
1075 hash_add_id(client_p);
1076
1077 /* XXX Does this ever happen? I don't think so -db */
1078 detach_conf(client_p, OPER_TYPE);
1079
1080 /* *WARNING*
1081 ** In the following code in place of plain server's
1082 ** name we send what is returned by get_client_name
1083 ** which may add the "sockhost" after the name. It's
1084 ** *very* *important* that there is a SPACE between
1085 ** the name and sockhost (if present). The receiving
1086 ** server will start the information field from this
1087 ** first blank and thus puts the sockhost into info.
1088 ** ...a bit tricky, but you have been warned, besides
1089 ** code is more neat this way... --msa
1090 */
1091 client_p->servptr = &me;
1092
1093 if (IsClosing(client_p))
1094 return;
1095
1096 SetServer(client_p);
1097
1098 /* Update the capability combination usage counts. -A1kmm */
1099 set_chcap_usage_counts(client_p);
1100
1101 /* Some day, all these lists will be consolidated *sigh* */
1102 dlinkAdd(client_p, &client_p->lnode, &me.serv->server_list);
1103
1104 m = dlinkFind(&unknown_list, client_p);
1105 assert(NULL != m);
1106
1107 dlinkDelete(m, &unknown_list);
1108 dlinkAdd(client_p, m, &serv_list);
1109
1110 Count.myserver++;
1111
1112 dlinkAdd(client_p, make_dlink_node(), &global_serv_list);
1113 hash_add_client(client_p);
1114
1115 /* doesnt duplicate client_p->serv if allocated this struct already */
1116 make_server(client_p);
1117
1118 /* fixing eob timings.. -gnp */
1119 client_p->firsttime = CurrentTime;
1120
1121 /* Show the real host/IP to admins */
1122 sendto_realops_flags(UMODE_ALL, L_ADMIN,
1123 "Link with %s established: (%s) link",
1124 inpath_ip,show_capabilities(client_p));
1125 /* Now show the masked hostname/IP to opers */
1126 sendto_realops_flags(UMODE_ALL, L_OPER,
1127 "Link with %s established: (%s) link",
1128 inpath,show_capabilities(client_p));
1129 ilog(L_NOTICE, "Link with %s established: (%s) link",
1130 inpath_ip, show_capabilities(client_p));
1131
1132 client_p->serv->sconf = conf;
1133
1134 if (HasServlink(client_p))
1135 {
1136 /* we won't overflow FD_DESC_SZ here, as it can hold
1137 * client_p->name + 64
1138 */
1139 fd_note(&client_p->localClient->fd, "slink data: %s", client_p->name);
1140 fd_note(&client_p->localClient->ctrlfd, "slink ctrl: %s", client_p->name);
1141 }
1142 else
1143 fd_note(&client_p->localClient->fd, "Server: %s", client_p->name);
1144
1145 /* Old sendto_serv_but_one() call removed because we now
1146 ** need to send different names to different servers
1147 ** (domain name matching) Send new server to other servers.
1148 */
1149 DLINK_FOREACH(ptr, serv_list.head)
1150 {
1151 target_p = ptr->data;
1152
1153 if (target_p == client_p)
1154 continue;
1155
1156 if ((conf = target_p->serv->sconf) &&
1157 match(my_name_for_link(conf), client_p->name))
1158 continue;
1159
1160 if (IsCapable(target_p, CAP_TS6) && HasID(client_p))
1161 sendto_one(target_p, ":%s SID %s 2 %s :%s%s",
1162 me.id, client_p->name, client_p->id,
1163 IsHidden(client_p) ? "(H) " : "",
1164 client_p->info);
1165 else
1166 sendto_one(target_p,":%s SERVER %s 2 :%s%s",
1167 me.name, client_p->name,
1168 IsHidden(client_p) ? "(H) " : "",
1169 client_p->info);
1170 }
1171
1172 /* Pass on my client information to the new server
1173 **
1174 ** First, pass only servers (idea is that if the link gets
1175 ** cancelled beacause the server was already there,
1176 ** there are no NICK's to be cancelled...). Of course,
1177 ** if cancellation occurs, all this info is sent anyway,
1178 ** and I guess the link dies when a read is attempted...? --msa
1179 **
1180 ** Note: Link cancellation to occur at this point means
1181 ** that at least two servers from my fragment are building
1182 ** up connection this other fragment at the same time, it's
1183 ** a race condition, not the normal way of operation...
1184 **
1185 ** ALSO NOTE: using the get_client_name for server names--
1186 ** see previous *WARNING*!!! (Also, original inpath
1187 ** is destroyed...)
1188 */
1189
1190 conf = client_p->serv->sconf;
1191
1192 DLINK_FOREACH_PREV(ptr, global_serv_list.tail)
1193 {
1194 target_p = ptr->data;
1195
1196 /* target_p->from == target_p for target_p == client_p */
1197 if (target_p->from == client_p)
1198 continue;
1199
1200 if (match(my_name_for_link(conf), target_p->name))
1201 continue;
1202
1203 if (IsCapable(client_p, CAP_TS6))
1204 {
1205 if (HasID(target_p))
1206 sendto_one(client_p, ":%s SID %s %d %s :%s%s",
1207 ID(target_p->servptr), target_p->name, target_p->hopcount+1,
1208 target_p->id, IsHidden(target_p) ? "(H) " : "",
1209 target_p->info);
1210 else /* introducing non-ts6 server */
1211 sendto_one(client_p, ":%s SERVER %s %d :%s%s",
1212 ID(target_p->servptr), target_p->name, target_p->hopcount+1,
1213 IsHidden(target_p) ? "(H) " : "", target_p->info);
1214 }
1215 else
1216 sendto_one(client_p, ":%s SERVER %s %d :%s%s",
1217 target_p->servptr->name, target_p->name, target_p->hopcount+1,
1218 IsHidden(target_p) ? "(H) " : "", target_p->info);
1219 }
1220
1221 server_burst(client_p);
1222 }
1223
1224 static void
1225 start_io(struct Client *server)
1226 {
1227 struct LocalUser *lserver = server->localClient;
1228 int alloclen = 1;
1229 char *buf;
1230 dlink_node *ptr;
1231 struct dbuf_block *block;
1232
1233 /* calculate how many bytes to allocate */
1234 if (IsCapable(server, CAP_ZIP))
1235 alloclen += 6;
1236 #ifdef HAVE_LIBCRYPTO
1237 if (IsCapable(server, CAP_ENC))
1238 alloclen += 16 + lserver->in_cipher->keylen + lserver->out_cipher->keylen;
1239 #endif
1240 alloclen += dbuf_length(&lserver->buf_recvq);
1241 alloclen += dlink_list_length(&lserver->buf_recvq.blocks) * 3;
1242 alloclen += dbuf_length(&lserver->buf_sendq);
1243 alloclen += dlink_list_length(&lserver->buf_sendq.blocks) * 3;
1244
1245 /* initialize servlink control sendq */
1246 lserver->slinkq = buf = MyMalloc(alloclen);
1247 lserver->slinkq_ofs = 0;
1248 lserver->slinkq_len = alloclen;
1249
1250 if (IsCapable(server, CAP_ZIP))
1251 {
1252 /* ziplink */
1253 *buf++ = SLINKCMD_SET_ZIP_OUT_LEVEL;
1254 *buf++ = 0; /* | */
1255 *buf++ = 1; /* \ len is 1 */
1256 *buf++ = ConfigFileEntry.compression_level;
1257 *buf++ = SLINKCMD_START_ZIP_IN;
1258 *buf++ = SLINKCMD_START_ZIP_OUT;
1259 }
1260 #ifdef HAVE_LIBCRYPTO
1261 if (IsCapable(server, CAP_ENC))
1262 {
1263 /* Decryption settings */
1264 *buf++ = SLINKCMD_SET_CRYPT_IN_CIPHER;
1265 *buf++ = 0; /* / (upper 8-bits of len) */
1266 *buf++ = 1; /* \ cipher id is 1 byte (lower 8-bits of len) */
1267 *buf++ = lserver->in_cipher->cipherid;
1268 *buf++ = SLINKCMD_SET_CRYPT_IN_KEY;
1269 *buf++ = 0; /* keylen < 256 */
1270 *buf++ = lserver->in_cipher->keylen;
1271 memcpy(buf, lserver->in_key, lserver->in_cipher->keylen);
1272 buf += lserver->in_cipher->keylen;
1273 /* Encryption settings */
1274 *buf++ = SLINKCMD_SET_CRYPT_OUT_CIPHER;
1275 *buf++ = 0; /* / (upper 8-bits of len) */
1276 *buf++ = 1; /* \ cipher id is 1 byte (lower 8-bits of len) */
1277 *buf++ = lserver->out_cipher->cipherid;
1278 *buf++ = SLINKCMD_SET_CRYPT_OUT_KEY;
1279 *buf++ = 0; /* keylen < 256 */
1280 *buf++ = lserver->out_cipher->keylen;
1281 memcpy(buf, lserver->out_key, lserver->out_cipher->keylen);
1282 buf += lserver->out_cipher->keylen;
1283 *buf++ = SLINKCMD_START_CRYPT_IN;
1284 *buf++ = SLINKCMD_START_CRYPT_OUT;
1285 }
1286 #endif
1287
1288 /* pass the whole recvq to servlink */
1289 DLINK_FOREACH (ptr, lserver->buf_recvq.blocks.head)
1290 {
1291 block = ptr->data;
1292 *buf++ = SLINKCMD_INJECT_RECVQ;
1293 *buf++ = (block->size >> 8);
1294 *buf++ = (block->size & 0xff);
1295 memcpy(buf, &block->data[0], block->size);
1296 buf += block->size;
1297 }
1298
1299 dbuf_clear(&lserver->buf_recvq);
1300
1301 /* pass the whole sendq to servlink */
1302 DLINK_FOREACH (ptr, lserver->buf_sendq.blocks.head)
1303 {
1304 block = ptr->data;
1305 *buf++ = SLINKCMD_INJECT_SENDQ;
1306 *buf++ = (block->size >> 8);
1307 *buf++ = (block->size & 0xff);
1308 memcpy(buf, &block->data[0], block->size);
1309 buf += block->size;
1310 }
1311
1312 dbuf_clear(&lserver->buf_sendq);
1313
1314 /* start io */
1315 *buf++ = SLINKCMD_INIT;
1316
1317 /* schedule a write */
1318 send_queued_slink_write(server);
1319 }
1320
1321 /* fork_server()
1322 *
1323 * inputs - struct Client *server
1324 * output - success: 0 / failure: -1
1325 * side effect - fork, and exec SERVLINK to handle this connection
1326 */
1327 static int
1328 fork_server(struct Client *server)
1329 {
1330 #ifndef HAVE_SOCKETPAIR
1331 return -1;
1332 #else
1333 int i;
1334 int slink_fds[2][2];
1335 /* 0? - ctrl | 1? - data
1336 * ?0 - child | ?1 - parent */
1337
1338 if (socketpair(AF_UNIX, SOCK_STREAM, 0, slink_fds[0]) < 0)
1339 return -1;
1340 if (socketpair(AF_UNIX, SOCK_STREAM, 0, slink_fds[1]) < 0)
1341 goto free_ctrl_fds;
1342
1343 if ((i = fork()) < 0)
1344 {
1345 close(slink_fds[1][0]); close(slink_fds[1][1]);
1346 free_ctrl_fds:
1347 close(slink_fds[0][0]); close(slink_fds[0][1]);
1348 return -1;
1349 }
1350
1351 if (i == 0)
1352 {
1353 char fd_str[3][6]; /* store 3x sizeof("65535") */
1354 char *kid_argv[7];
1355
1356 #ifdef O_ASYNC
1357 fcntl(server->localClient->fd.fd, F_SETFL,
1358 fcntl(server->localClient->fd.fd, F_GETFL, 0) & ~O_ASYNC);
1359 #endif
1360 close_fds(&server->localClient->fd);
1361 close(slink_fds[0][1]);
1362 close(slink_fds[1][1]);
1363
1364 sprintf(fd_str[0], "%d", slink_fds[0][0]);
1365 sprintf(fd_str[1], "%d", slink_fds[1][0]);
1366 sprintf(fd_str[2], "%d", server->localClient->fd.fd);
1367
1368 kid_argv[0] = "-slink";
1369 kid_argv[1] = kid_argv[2] = fd_str[0]; /* ctrl */
1370 kid_argv[3] = kid_argv[4] = fd_str[1]; /* data */
1371 kid_argv[5] = fd_str[2]; /* network */
1372 kid_argv[6] = NULL;
1373
1374 execv(ConfigFileEntry.servlink_path, kid_argv);
1375
1376 _exit(1);
1377 }
1378
1379 /* close the network fd and the child ends of the pipes */
1380 fd_close(&server->localClient->fd);
1381 close(slink_fds[0][0]);
1382 close(slink_fds[1][0]);
1383
1384 execute_callback(setup_socket_cb, slink_fds[0][1]);
1385 execute_callback(setup_socket_cb, slink_fds[1][1]);
1386
1387 fd_open(&server->localClient->ctrlfd, slink_fds[0][1], 1, "slink ctrl");
1388 fd_open(&server->localClient->fd, slink_fds[1][1], 1, "slink data");
1389
1390 read_ctrl_packet(&server->localClient->ctrlfd, server);
1391 read_packet(&server->localClient->fd, server);
1392
1393 return 0;
1394 #endif
1395 }
1396
1397 /* server_burst()
1398 *
1399 * inputs - struct Client pointer server
1400 * -
1401 * output - none
1402 * side effects - send a server burst
1403 * bugs - still too long
1404 */
1405 static void
1406 server_burst(struct Client *client_p)
1407 {
1408 /* Send it in the shortened format with the TS, if
1409 ** it's a TS server; walk the list of channels, sending
1410 ** all the nicks that haven't been sent yet for each
1411 ** channel, then send the channel itself -- it's less
1412 ** obvious than sending all nicks first, but on the
1413 ** receiving side memory will be allocated more nicely
1414 ** saving a few seconds in the handling of a split
1415 ** -orabidoo
1416 */
1417
1418 burst_all(client_p);
1419
1420 /* EOB stuff is now in burst_all */
1421 /* Always send a PING after connect burst is done */
1422 sendto_one(client_p, "PING :%s", ID_or_name(&me, client_p));
1423 }
1424
1425 /* burst_all()
1426 *
1427 * inputs - pointer to server to send burst to
1428 * output - NONE
1429 * side effects - complete burst of channels/nicks is sent to client_p
1430 */
1431 static void
1432 burst_all(struct Client *client_p)
1433 {
1434 dlink_node *ptr = NULL;
1435
1436 DLINK_FOREACH(ptr, global_channel_list.head)
1437 {
1438 struct Channel *chptr = ptr->data;
1439
1440 if (dlink_list_length(&chptr->members) != 0)
1441 {
1442 burst_members(client_p, chptr);
1443 send_channel_modes(client_p, chptr);
1444
1445 if (IsCapable(client_p, CAP_TBURST) ||
1446 IsCapable(client_p, CAP_TB))
1447 send_tb(client_p, chptr);
1448 }
1449 }
1450
1451 /* also send out those that are not on any channel
1452 */
1453 DLINK_FOREACH(ptr, global_client_list.head)
1454 {
1455 struct Client *target_p = ptr->data;
1456
1457 if (!IsBursted(target_p) && target_p->from != client_p)
1458 sendnick_TS(client_p, target_p);
1459
1460 ClearBursted(target_p);
1461 }
1462
1463 /* We send the time we started the burst, and let the remote host determine an EOB time,
1464 ** as otherwise we end up sending a EOB of 0 Sending here means it gets sent last -- fl
1465 */
1466 /* Its simpler to just send EOB and use the time its been connected.. --fl_ */
1467 if (IsCapable(client_p, CAP_EOB))
1468 sendto_one(client_p, ":%s EOB", ID_or_name(&me, client_p));
1469 }
1470
1471 /*
1472 * send_tb
1473 *
1474 * inputs - pointer to Client
1475 * - pointer to channel
1476 * output - NONE
1477 * side effects - Called on a server burst when
1478 * server is CAP_TB|CAP_TBURST capable
1479 */
1480 static void
1481 send_tb(struct Client *client_p, struct Channel *chptr)
1482 {
1483 /*
1484 * We may also send an empty topic here, but only if topic_time isn't 0,
1485 * i.e. if we had a topic that got unset. This is required for syncing
1486 * topics properly.
1487 *
1488 * Imagine the following scenario: Our downlink introduces a channel
1489 * to us with a TS that is equal to ours, but the channel topic on
1490 * their side got unset while the servers were in splitmode, which means
1491 * their 'topic' is newer. They simply wanted to unset it, so we have to
1492 * deal with it in a more sophisticated fashion instead of just resetting
1493 * it to their old topic they had before. Read m_tburst.c:ms_tburst
1494 * for further information -Michael
1495 */
1496 if (chptr->topic_time != 0)
1497 {
1498 if (IsCapable(client_p, CAP_TBURST))
1499 sendto_one(client_p, ":%s TBURST %lu %s %lu %s :%s",
1500 me.name, (unsigned long)chptr->channelts, chptr->chname,
1501 (unsigned long)chptr->topic_time,
1502 chptr->topic_info ? chptr->topic_info : "",
1503 chptr->topic ? chptr->topic : "");
1504 else if (IsCapable(client_p, CAP_TB))
1505 {
1506 if (ConfigChannel.burst_topicwho)
1507 {
1508 sendto_one(client_p, ":%s TB %s %lu %s :%s",
1509 me.name, chptr->chname,
1510 (unsigned long)chptr->topic_time,
1511 chptr->topic_info, chptr->topic ? chptr->topic : "");
1512 }
1513 else
1514 {
1515 sendto_one(client_p, ":%s TB %s %lu :%s",
1516 me.name, chptr->chname,
1517 (unsigned long)chptr->topic_time,
1518 chptr->topic ? chptr->topic : "");
1519 }
1520 }
1521 }
1522 }
1523
1524 /* burst_members()
1525 *
1526 * inputs - pointer to server to send members to
1527 * - dlink_list pointer to membership list to send
1528 * output - NONE
1529 * side effects -
1530 */
1531 static void
1532 burst_members(struct Client *client_p, struct Channel *chptr)
1533 {
1534 struct Client *target_p;
1535 struct Membership *ms;
1536 dlink_node *ptr;
1537
1538 DLINK_FOREACH(ptr, chptr->members.head)
1539 {
1540 ms = ptr->data;
1541 target_p = ms->client_p;
1542
1543 if (!IsBursted(target_p))
1544 {
1545 SetBursted(target_p);
1546
1547 if (target_p->from != client_p)
1548 sendnick_TS(client_p, target_p);
1549 }
1550 }
1551 }
1552
1553 /* New server connection code
1554 * Based upon the stuff floating about in s_bsd.c
1555 * -- adrian
1556 */
1557
1558 /* serv_connect() - initiate a server connection
1559 *
1560 * inputs - pointer to conf
1561 * - pointer to client doing the connect
1562 * output -
1563 * side effects -
1564 *
1565 * This code initiates a connection to a server. It first checks to make
1566 * sure the given server exists. If this is the case, it creates a socket,
1567 * creates a client, saves the socket information in the client, and
1568 * initiates a connection to the server through comm_connect_tcp(). The
1569 * completion of this goes through serv_completed_connection().
1570 *
1571 * We return 1 if the connection is attempted, since we don't know whether
1572 * it suceeded or not, and 0 if it fails in here somewhere.
1573 */
1574 int
1575 serv_connect(struct AccessItem *aconf, struct Client *by)
1576 {
1577 struct ConfItem *conf;
1578 struct Client *client_p;
1579 char buf[HOSTIPLEN];
1580
1581 /* conversion structs */
1582 struct sockaddr_in *v4;
1583 /* Make sure aconf is useful */
1584 assert(aconf != NULL);
1585
1586 if(aconf == NULL)
1587 return (0);
1588
1589 /* XXX should be passing struct ConfItem in the first place */
1590 conf = unmap_conf_item(aconf);
1591
1592 /* log */
1593 irc_getnameinfo((struct sockaddr*)&aconf->ipnum, aconf->ipnum.ss_len,
1594 buf, HOSTIPLEN, NULL, 0, NI_NUMERICHOST);
1595 ilog(L_NOTICE, "Connect to %s[%s] @%s", aconf->user, aconf->host,
1596 buf);
1597
1598 /* Still processing a DNS lookup? -> exit */
1599 if (aconf->dns_query != NULL)
1600 {
1601 sendto_realops_flags(UMODE_ALL, L_OPER,
1602 "Error connecting to %s: Error during DNS lookup", conf->name);
1603 return (0);
1604 }
1605
1606 /* Make sure this server isn't already connected
1607 * Note: aconf should ALWAYS be a valid C: line
1608 */
1609 if ((client_p = find_server(conf->name)) != NULL)
1610 {
1611 sendto_realops_flags(UMODE_ALL, L_ADMIN,
1612 "Server %s already present from %s",
1613 conf->name, get_client_name(client_p, SHOW_IP));
1614 sendto_realops_flags(UMODE_ALL, L_OPER,
1615 "Server %s already present from %s",
1616 conf->name, get_client_name(client_p, MASK_IP));
1617 if (by && IsClient(by) && !MyClient(by))
1618 sendto_one(by, ":%s NOTICE %s :Server %s already present from %s",
1619 me.name, by->name, conf->name,
1620 get_client_name(client_p, MASK_IP));
1621 return (0);
1622 }
1623
1624 /* Create a local client */
1625 client_p = make_client(NULL);
1626
1627 /* Copy in the server, hostname, fd */
1628 strlcpy(client_p->name, conf->name, sizeof(client_p->name));
1629 strlcpy(client_p->host, aconf->host, sizeof(client_p->host));
1630
1631 /* We already converted the ip once, so lets use it - stu */
1632 strlcpy(client_p->sockhost, buf, HOSTIPLEN);
1633
1634 /* create a socket for the server connection */
1635 if (comm_open(&client_p->localClient->fd, aconf->ipnum.ss.ss_family,
1636 SOCK_STREAM, 0, NULL) < 0)
1637 {
1638 /* Eek, failure to create the socket */
1639 report_error(L_ALL,
1640 "opening stream socket to %s: %s", conf->name, errno);
1641 SetDead(client_p);
1642 exit_client(client_p, &me, "Connection failed");
1643 return (0);
1644 }
1645
1646 /* servernames are always guaranteed under HOSTLEN chars */
1647 fd_note(&client_p->localClient->fd, "Server: %s", conf->name);
1648
1649 /* Attach config entries to client here rather than in
1650 * serv_connect_callback(). This to avoid null pointer references.
1651 */
1652 if (!attach_connect_block(client_p, conf->name, aconf->host))
1653 {
1654 sendto_realops_flags(UMODE_ALL, L_ALL,
1655 "Host %s is not enabled for connecting:no C/N-line",
1656 conf->name);
1657 if (by && IsClient(by) && !MyClient(by))
1658 sendto_one(by, ":%s NOTICE %s :Connect to host %s failed.",
1659 me.name, by->name, client_p->name);
1660 SetDead(client_p);
1661 exit_client(client_p, client_p, "Connection failed");
1662 return (0);
1663 }
1664
1665 /* at this point we have a connection in progress and C/N lines
1666 * attached to the client, the socket info should be saved in the
1667 * client and it should either be resolved or have a valid address.
1668 *
1669 * The socket has been connected or connect is in progress.
1670 */
1671 make_server(client_p);
1672
1673 if (by && IsClient(by))
1674 strlcpy(client_p->serv->by, by->name, sizeof(client_p->serv->by));
1675 else
1676 strlcpy(client_p->serv->by, "AutoConn.", sizeof(client_p->serv->by));
1677
1678 SetConnecting(client_p);
1679 dlinkAdd(client_p, &client_p->node, &global_client_list);
1680 /* from def_fam */
1681 client_p->localClient->aftype = aconf->aftype;
1682
1683 /* Now, initiate the connection */
1684 /* XXX assume that a non 0 type means a specific bind address
1685 * for this connect.
1686 */
1687 switch (aconf->aftype)
1688 {
1689 case AF_INET:
1690 v4 = (struct sockaddr_in*)&aconf->my_ipnum;
1691 if (v4->sin_addr.s_addr != 0)
1692 {
1693 struct irc_ssaddr ipn;
1694 memset(&ipn, 0, sizeof(struct irc_ssaddr));
1695 ipn.ss.ss_family = AF_INET;
1696 ipn.ss_port = 0;
1697 memcpy(&ipn, &aconf->my_ipnum, sizeof(struct irc_ssaddr));
1698 comm_connect_tcp(&client_p->localClient->fd, aconf->host, aconf->port,
1699 (struct sockaddr *)&ipn, ipn.ss_len,
1700 serv_connect_callback, client_p, aconf->aftype,
1701 CONNECTTIMEOUT);
1702 }
1703 else if (ServerInfo.specific_ipv4_vhost)
1704 {
1705 struct irc_ssaddr ipn;
1706 memset(&ipn, 0, sizeof(struct irc_ssaddr));
1707 ipn.ss.ss_family = AF_INET;
1708 ipn.ss_port = 0;
1709 memcpy(&ipn, &ServerInfo.ip, sizeof(struct irc_ssaddr));
1710 comm_connect_tcp(&client_p->localClient->fd, aconf->host, aconf->port,
1711 (struct sockaddr *)&ipn, ipn.ss_len,
1712 serv_connect_callback, client_p, aconf->aftype,
1713 CONNECTTIMEOUT);
1714 }
1715 else
1716 comm_connect_tcp(&client_p->localClient->fd, aconf->host, aconf->port,
1717 NULL, 0, serv_connect_callback, client_p, aconf->aftype,
1718 CONNECTTIMEOUT);
1719 break;
1720 #ifdef IPV6
1721 case AF_INET6:
1722 {
1723 struct irc_ssaddr ipn;
1724 struct sockaddr_in6 *v6;
1725 struct sockaddr_in6 *v6conf;
1726
1727 memset(&ipn, 0, sizeof(struct irc_ssaddr));
1728 v6conf = (struct sockaddr_in6 *)&aconf->my_ipnum;
1729 v6 = (struct sockaddr_in6 *)&ipn;
1730
1731 if (memcmp(&v6conf->sin6_addr, &v6->sin6_addr,
1732 sizeof(struct in6_addr)) != 0)
1733 {
1734 memcpy(&ipn, &aconf->my_ipnum, sizeof(struct irc_ssaddr));
1735 ipn.ss.ss_family = AF_INET6;
1736 ipn.ss_port = 0;
1737 comm_connect_tcp(&client_p->localClient->fd,
1738 aconf->host, aconf->port,
1739 (struct sockaddr *)&ipn, ipn.ss_len,
1740 serv_connect_callback, client_p,
1741 aconf->aftype, CONNECTTIMEOUT);
1742 }
1743 else if (ServerInfo.specific_ipv6_vhost)
1744 {
1745 memcpy(&ipn, &ServerInfo.ip6, sizeof(struct irc_ssaddr));
1746 ipn.ss.ss_family = AF_INET6;
1747 ipn.ss_port = 0;
1748 comm_connect_tcp(&client_p->localClient->fd,
1749 aconf->host, aconf->port,
1750 (struct sockaddr *)&ipn, ipn.ss_len,
1751 serv_connect_callback, client_p,
1752 aconf->aftype, CONNECTTIMEOUT);
1753 }
1754 else
1755 comm_connect_tcp(&client_p->localClient->fd,
1756 aconf->host, aconf->port,
1757 NULL, 0, serv_connect_callback, client_p,
1758 aconf->aftype, CONNECTTIMEOUT);
1759 }
1760 #endif
1761 }
1762 return (1);
1763 }
1764
1765 /* serv_connect_callback() - complete a server connection.
1766 *
1767 * This routine is called after the server connection attempt has
1768 * completed. If unsucessful, an error is sent to ops and the client
1769 * is closed. If sucessful, it goes through the initialisation/check
1770 * procedures, the capabilities are sent, and the socket is then
1771 * marked for reading.
1772 */
1773 static void
1774 serv_connect_callback(fde_t *fd, int status, void *data)
1775 {
1776 struct Client *client_p = data;
1777 struct ConfItem *conf=NULL;
1778 struct AccessItem *aconf=NULL;
1779
1780 /* First, make sure its a real client! */
1781 assert(client_p != NULL);
1782 assert(&client_p->localClient->fd == fd);
1783
1784 /* Next, for backward purposes, record the ip of the server */
1785 memcpy(&client_p->localClient->ip, &fd->connect.hostaddr,
1786 sizeof(struct irc_ssaddr));
1787 /* Check the status */
1788 if (status != COMM_OK)
1789 {
1790 /* We have an error, so report it and quit
1791 * Admins get to see any IP, mere opers don't *sigh*
1792 */
1793 if (ConfigServerHide.hide_server_ips)
1794 sendto_realops_flags(UMODE_ALL, L_ADMIN,
1795 "Error connecting to %s: %s",
1796 client_p->name, comm_errstr(status));
1797 else
1798 sendto_realops_flags(UMODE_ALL, L_ADMIN,
1799 "Error connecting to %s[%s]: %s", client_p->name,
1800 client_p->host, comm_errstr(status));
1801
1802 sendto_realops_flags(UMODE_ALL, L_OPER,
1803 "Error connecting to %s: %s",
1804 client_p->name, comm_errstr(status));
1805
1806 /* If a fd goes bad, call dead_link() the socket is no
1807 * longer valid for reading or writing.
1808 */
1809 dead_link_on_write(client_p, 0);
1810 return;
1811 }
1812
1813 /* COMM_OK, so continue the connection procedure */
1814 /* Get the C/N lines */
1815 conf = find_conf_name(&client_p->localClient->confs,
1816 client_p->name, SERVER_TYPE);
1817 if (conf == NULL)
1818 {
1819 sendto_realops_flags(UMODE_ALL, L_ADMIN,
1820 "Lost connect{} block for %s", get_client_name(client_p, HIDE_IP));
1821 sendto_realops_flags(UMODE_ALL, L_OPER,
1822 "Lost connect{} block for %s", get_client_name(client_p, MASK_IP));
1823
1824 exit_client(client_p, &me, "Lost connect{} block");
1825 return;
1826 }
1827
1828 aconf = (struct AccessItem *)map_to_conf(conf);
1829 /* Next, send the initial handshake */
1830 SetHandshake(client_p);
1831
1832 #ifdef HAVE_LIBCRYPTO
1833 /* Handle all CRYPTLINK links in cryptlink_init */
1834 if (IsConfCryptLink(aconf))
1835 {
1836 cryptlink_init(client_p, conf, fd);
1837 return;
1838 }
1839 #endif
1840
1841 /* jdc -- Check and send spasswd, not passwd. */
1842 if (!EmptyString(aconf->spasswd) && (me.id[0] != '\0'))
1843 /* Send TS 6 form only if id */
1844 sendto_one(client_p, "PASS %s TS %d %s",
1845 aconf->spasswd, TS_CURRENT, me.id);
1846 else
1847 sendto_one(client_p, "PASS %s TS 5",
1848 aconf->spasswd);
1849
1850 /* Pass my info to the new server
1851 *
1852 * If this is a HUB, pass on CAP_HUB
1853 * Pass on ZIP if supported
1854 * Pass on TB if supported.
1855 * - Dianora
1856 */
1857 send_capabilities(client_p, aconf, (ServerInfo.hub ? CAP_HUB : 0)
1858 | (IsConfCompressed(aconf) ? CAP_ZIP : 0)
1859 | (IsConfTopicBurst(aconf) ? CAP_TBURST|CAP_TB : 0), 0);
1860
1861 sendto_one(client_p, "SERVER %s 1 :%s%s",
1862 my_name_for_link(conf),
1863 ConfigServerHide.hidden ? "(H) " : "",
1864 me.info);
1865
1866 /* If we've been marked dead because a send failed, just exit
1867 * here now and save everyone the trouble of us ever existing.
1868 */
1869 if (IsDead(client_p))
1870 {
1871 sendto_realops_flags(UMODE_ALL, L_ADMIN,
1872 "%s[%s] went dead during handshake",
1873 client_p->name,
1874 client_p->host);
1875 sendto_realops_flags(UMODE_ALL, L_OPER,
1876 "%s went dead during handshake", client_p->name);
1877 return;
1878 }
1879
1880 /* don't move to serv_list yet -- we haven't sent a burst! */
1881 /* If we get here, we're ok, so lets start reading some data */
1882 comm_setselect(fd, COMM_SELECT_READ, read_packet, client_p, 0);
1883 }
1884
1885 struct Client *
1886 find_servconn_in_progress(const char *name)
1887 {
1888 dlink_node *ptr;
1889 struct Client *cptr;
1890
1891 DLINK_FOREACH(ptr, unknown_list.head)
1892 {
1893 cptr = ptr->data;
1894
1895 if (cptr && cptr->name[0])
1896 if (match(cptr->name, name) || match(name, cptr->name))
1897 return cptr;
1898 }
1899
1900 return NULL;
1901 }
1902
1903 #ifdef HAVE_LIBCRYPTO
1904 /*
1905 * sends a CRYPTLINK SERV command.
1906 */
1907 void
1908 cryptlink_init(struct Client *client_p, struct ConfItem *conf, fde_t *fd)
1909 {
1910 struct AccessItem *aconf;
1911 char *encrypted;
1912 unsigned char *key_to_send;
1913 char randkey[CIPHERKEYLEN];
1914 int enc_len;
1915
1916 /* get key */
1917 if ((!ServerInfo.rsa_private_key) ||
1918 (!RSA_check_key(ServerInfo.rsa_private_key)) )
1919 {
1920 cryptlink_error(client_p, "SERV", "Invalid RSA private key",
1921 "Invalid RSA private key");
1922 return;
1923 }
1924
1925 aconf = (struct AccessItem *)map_to_conf(conf);
1926
1927 if (aconf->rsa_public_key == NULL)
1928 {
1929 cryptlink_error(client_p, "SERV", "Invalid RSA public key",
1930 "Invalid RSA public key");
1931 return;
1932 }
1933
1934 if (get_randomness((unsigned char *)randkey, CIPHERKEYLEN) != 1)
1935 {
1936 cryptlink_error(client_p, "SERV", "Couldn't generate keyphrase",
1937 "Couldn't generate keyphrase");
1938 return;
1939 }
1940
1941 encrypted = MyMalloc(RSA_size(ServerInfo.rsa_private_key));
1942 enc_len = RSA_public_encrypt(CIPHERKEYLEN,
1943 (unsigned char *)randkey,
1944 (unsigned char *)encrypted,
1945 aconf->rsa_public_key,
1946 RSA_PKCS1_PADDING);
1947
1948 memcpy(client_p->localClient->in_key, randkey, CIPHERKEYLEN);
1949
1950 if (enc_len <= 0)
1951 {
1952 report_crypto_errors();
1953 MyFree(encrypted);
1954 cryptlink_error(client_p, "SERV", "Couldn't encrypt data",
1955 "Couldn't encrypt data");
1956 return;
1957 }
1958
1959 if (!(base64_block(&key_to_send, encrypted, enc_len)))
1960 {
1961 MyFree(encrypted);
1962 cryptlink_error(client_p, "SERV", "Couldn't base64 encode key",
1963 "Couldn't base64 encode key");
1964 return;
1965 }
1966
1967 send_capabilities(client_p, aconf, (ServerInfo.hub ? CAP_HUB : 0)
1968 | (IsConfCompressed(aconf) ? CAP_ZIP : 0)
1969 | (IsConfTopicBurst(aconf) ? CAP_TBURST|CAP_TB : 0), CAP_ENC_MASK);
1970
1971 if (me.id[0])
1972 sendto_one(client_p, "PASS . TS %d %s", TS_CURRENT, me.id);
1973
1974 sendto_one(client_p, "CRYPTLINK SERV %s %s :%s%s",
1975 my_name_for_link(conf), key_to_send,
1976 ConfigServerHide.hidden ? "(H) " : "", me.info);
1977
1978 SetHandshake(client_p);
1979 SetWaitAuth(client_p);
1980
1981 MyFree(encrypted);
1982 MyFree(key_to_send);
1983
1984 if (IsDead(client_p))
1985 cryptlink_error(client_p, "SERV", "Went dead during handshake",
1986 "Went dead during handshake");
1987 else if (fd != NULL)
1988 /* If we get here, we're ok, so lets start reading some data */
1989 comm_setselect(fd, COMM_SELECT_READ, read_packet, client_p, 0);
1990 }
1991
1992 void
1993 cryptlink_error(struct Client *client_p, const char *type,
1994 const char *reason, const char *client_reason)
1995 {
1996 sendto_realops_flags(UMODE_ALL, L_ADMIN, "%s: CRYPTLINK %s error - %s",
1997 get_client_name(client_p, SHOW_IP), type, reason);
1998 sendto_realops_flags(UMODE_ALL, L_OPER, "%s: CRYPTLINK %s error - %s",
1999 get_client_name(client_p, MASK_IP), type, reason);
2000 ilog(L_ERROR, "%s: CRYPTLINK %s error - %s",
2001 get_client_name(client_p, SHOW_IP), type, reason);
2002
2003 /* If client_reason isn't NULL, then exit the client with the message
2004 * defined in the call.
2005 */
2006 if ((client_reason != NULL) && (!IsDead(client_p)))
2007 exit_client(client_p, &me, client_reason);
2008 }
2009
2010 static char base64_chars[] =
2011 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
2012
2013 static char base64_values[] =
2014 {
2015 /* 00-15 */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
2016 /* 16-31 */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
2017 /* 32-47 */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63,
2018 /* 48-63 */ 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, 0, -1, -1,
2019 /* 64-79 */ -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
2020 /* 80-95 */ 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1,
2021 /* 96-111 */ -1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
2022 /* 112-127 */ 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1,
2023 /* 128-143 */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
2024 /* 144-159 */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
2025 /* 160-175 */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
2026 /* 186-191 */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
2027 /* 192-207 */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
2028 /* 208-223 */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
2029 /* 224-239 */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
2030 /* 240-255 */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1
2031 };
2032
2033 /*
2034 * base64_block will allocate and return a new block of memory
2035 * using MyMalloc(). It should be freed after use.
2036 */
2037 int
2038 base64_block(unsigned char **output, char *data, int len)
2039 {
2040 unsigned char *out;
2041 unsigned char *in = (unsigned char*)data;
2042 unsigned long int q_in;
2043 int i;
2044 int count = 0;
2045
2046 out = MyMalloc(((((len + 2) - ((len + 2) % 3)) / 3) * 4) + 1);
2047
2048 /* process 24 bits at a time */
2049 for( i = 0; i < len; i += 3)
2050 {
2051 q_in = 0;
2052
2053 if ( i + 2 < len )
2054 {
2055 q_in = (in[i+2] & 0xc0) << 2;
2056 q_in |= in[i+2];
2057 }
2058
2059 if ( i + 1 < len )
2060 {
2061 q_in |= (in[i+1] & 0x0f) << 10;
2062 q_in |= (in[i+1] & 0xf0) << 12;
2063 }
2064
2065 q_in |= (in[i] & 0x03) << 20;
2066 q_in |= in[i] << 22;
2067
2068 q_in &= 0x3f3f3f3f;
2069
2070 out[count++] = base64_chars[((q_in >> 24) )];
2071 out[count++] = base64_chars[((q_in >> 16) & 0xff)];
2072 out[count++] = base64_chars[((q_in >> 8) & 0xff)];
2073 out[count++] = base64_chars[((q_in ) & 0xff)];
2074 }
2075 if ( (i - len) > 0 )
2076 {
2077 out[count-1] = '=';
2078 if ( (i - len) > 1 )
2079 out[count-2] = '=';
2080 }
2081
2082 out[count] = '\0';
2083 *output = out;
2084 return (count);
2085 }
2086
2087 /*
2088 * unbase64_block will allocate and return a new block of memory
2089 * using MyMalloc(). It should be freed after use.
2090 */
2091 int
2092 unbase64_block(unsigned char **output, char *data, int len)
2093 {
2094 unsigned char *out;
2095 unsigned char *in = (unsigned char*)data;
2096 unsigned long int q_in;
2097 int i;
2098 int count = 0;
2099
2100 if ((len % 4) != 0)
2101 return (0);
2102
2103 out = MyMalloc(((len / 4) * 3) + 1);
2104
2105 /* process 32 bits at a time */
2106 for( i = 0; (i + 3) < len; i+=4)
2107 {
2108 /* compress input (chars a, b, c and d) as follows:
2109 * (after converting ascii -> base64 value)
2110 *
2111 * |00000000aaaaaabbbbbbccccccdddddd|
2112 * | 765432 107654 321076 543210|
2113 */
2114
2115 q_in = 0;
2116
2117 if (base64_values[in[i+3]] > -1)
2118 q_in |= base64_values[in[i+3]] ;
2119 if (base64_values[in[i+2]] > -1)
2120 q_in |= base64_values[in[i+2]] << 6;
2121 if (base64_values[in[i+1]] > -1)
2122 q_in |= base64_values[in[i+1]] << 12;
2123 if (base64_values[in[i ]] > -1)
2124 q_in |= base64_values[in[i ]] << 18;
2125
2126 out[count++] = (q_in >> 16) & 0xff;
2127 out[count++] = (q_in >> 8) & 0xff;
2128 out[count++] = (q_in ) & 0xff;
2129 }
2130
2131 if (in[i-1] == '=') count--;
2132 if (in[i-2] == '=') count--;
2133
2134 out[count] = '\0';
2135 *output = out;
2136 return (count);
2137 }
2138
2139 #endif /* HAVE_LIBCRYPTO */
2140

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