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Contents of /ircd-hybrid-7.2/src/s_serv.c

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Revision 1013 - (show annotations)
Sun Oct 18 14:26:49 2009 UTC (11 years, 4 months ago) by michael
File MIME type: text/x-chdr
File size: 62742 byte(s)
- Add -Wextra -Wcast-align -Wbad-function-cast to CFLAGS if --enable-warnings is specified
- Fixed several compile warnings
- 64-bit cleanliness fixes, e.g., reorganize data structures to reduce storage/unnecessary padding

1 /*
2 * ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
3 * s_serv.c: Server related functions.
4 *
5 * Copyright (C) 2005 by the past and present ircd coders, and others.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
20 * USA
21 *
22 * $Id$
23 */
24
25 #include "stdinc.h"
26 #ifdef HAVE_LIBCRYPTO
27 #include <openssl/rsa.h>
28 #include "rsa.h"
29 #endif
30 #include "list.h"
31 #include "channel.h"
32 #include "channel_mode.h"
33 #include "client.h"
34 #include "common.h"
35 #include "dbuf.h"
36 #include "event.h"
37 #include "fdlist.h"
38 #include "hash.h"
39 #include "irc_string.h"
40 #include "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 "numeric.h"
47 #include "packet.h"
48 #include "irc_res.h"
49 #include "s_conf.h"
50 #include "s_serv.h"
51 #include "s_log.h"
52 #include "s_user.h"
53 #include "send.h"
54 #include "memory.h"
55 #include "channel.h" /* chcap_usage_counts stuff...*/
56
57 #define MIN_CONN_FREQ 300
58
59 static dlink_list cap_list = { NULL, NULL, 0 };
60 static void server_burst(struct Client *);
61 static int fork_server(struct Client *);
62 static void burst_all(struct Client *);
63 static void send_tb(struct Client *client_p, struct Channel *chptr);
64
65 static CNCB serv_connect_callback;
66
67 static void start_io(struct Client *);
68 static void burst_members(struct Client *, struct Channel *);
69
70 static SlinkRplHnd slink_error;
71 static SlinkRplHnd slink_zipstats;
72
73
74 #ifdef HAVE_LIBCRYPTO
75 struct EncCapability CipherTable[] =
76 {
77 #ifdef HAVE_EVP_BF_CFB
78 { "BF/168", CAP_ENC_BF_168, 24, CIPHER_BF },
79 { "BF/128", CAP_ENC_BF_128, 16, CIPHER_BF },
80 #endif
81 #ifdef HAVE_EVP_CAST5_CFB
82 { "CAST/128", CAP_ENC_CAST_128, 16, CIPHER_CAST },
83 #endif
84 #ifdef HAVE_EVP_IDEA_CFB
85 { "IDEA/128", CAP_ENC_IDEA_128, 16, CIPHER_IDEA },
86 #endif
87 #ifdef HAVE_EVP_RC5_32_12_16_CFB
88 { "RC5.16/128", CAP_ENC_RC5_16_128, 16, CIPHER_RC5_16 },
89 { "RC5.12/128", CAP_ENC_RC5_12_128, 16, CIPHER_RC5_12 },
90 { "RC5.8/128", CAP_ENC_RC5_8_128, 16, CIPHER_RC5_8 },
91 #endif
92 #ifdef HAVE_EVP_DES_EDE3_CFB
93 { "3DES/168", CAP_ENC_3DES_168, 24, CIPHER_3DES },
94 #endif
95 #ifdef HAVE_EVP_DES_CFB
96 { "DES/56", CAP_ENC_DES_56, 8, CIPHER_DES },
97 #endif
98 { 0, 0, 0, 0 }
99 };
100 #endif
101
102 struct SlinkRplDef slinkrpltab[] = {
103 { SLINKRPL_ERROR, slink_error, SLINKRPL_FLAG_DATA },
104 { SLINKRPL_ZIPSTATS, slink_zipstats, SLINKRPL_FLAG_DATA },
105 { 0, 0, 0 },
106 };
107
108
109 void
110 slink_error(unsigned int rpl, unsigned int len, unsigned char *data,
111 struct Client *server_p)
112 {
113 assert(rpl == SLINKRPL_ERROR);
114 assert(len < 256);
115
116 data[len-1] = '\0';
117
118 sendto_realops_flags(UMODE_ALL, L_ALL, "SlinkError for %s: %s",
119 server_p->name, data);
120 /* XXX should this be exit_client? */
121 exit_client(server_p, &me, "servlink error -- terminating link");
122 }
123
124 void
125 slink_zipstats(unsigned int rpl, unsigned int len, unsigned char *data,
126 struct Client *server_p)
127 {
128 struct ZipStats zipstats;
129 uint64_t in = 0, in_wire = 0, out = 0, out_wire = 0;
130 int i = 0;
131
132 assert(rpl == SLINKRPL_ZIPSTATS);
133 assert(len == 16);
134 assert(IsCapable(server_p, CAP_ZIP));
135
136 /* Yes, it needs to be done this way, no we cannot let the compiler
137 * work with the pointer to the structure. This works around a GCC
138 * bug on SPARC that affects all versions at the time of this writing.
139 * I will feed you to the creatures living in RMS's beard if you do
140 * not leave this as is, without being sure that you are not causing
141 * regression for most of our installed SPARC base.
142 * -jmallett, 04/27/2002
143 */
144 memcpy(&zipstats, &server_p->localClient->zipstats, sizeof(struct ZipStats));
145
146 in |= (data[i++] << 24);
147 in |= (data[i++] << 16);
148 in |= (data[i++] << 8);
149 in |= (data[i++] );
150
151 in_wire |= (data[i++] << 24);
152 in_wire |= (data[i++] << 16);
153 in_wire |= (data[i++] << 8);
154 in_wire |= (data[i++] );
155
156 out |= (data[i++] << 24);
157 out |= (data[i++] << 16);
158 out |= (data[i++] << 8);
159 out |= (data[i++] );
160
161 out_wire |= (data[i++] << 24);
162 out_wire |= (data[i++] << 16);
163 out_wire |= (data[i++] << 8);
164 out_wire |= (data[i++] );
165
166 /* This macro adds b to a if a plus b is not an overflow, and sets the
167 * value of a to b if it is.
168 * Add and Set if No Overflow.
169 */
170 #define ASNO(a, b) a = (a + b >= a ? a + b : b)
171
172 ASNO(zipstats.in, in);
173 ASNO(zipstats.out, out);
174 ASNO(zipstats.in_wire, in_wire);
175 ASNO(zipstats.out_wire, out_wire);
176
177 if (zipstats.in > 0)
178 zipstats.in_ratio = (((double)(zipstats.in - zipstats.in_wire) /
179 (double)zipstats.in) * 100.00);
180 else
181 zipstats.in_ratio = 0;
182
183 if (zipstats.out > 0)
184 zipstats.out_ratio = (((double)(zipstats.out - zipstats.out_wire) /
185 (double)zipstats.out) * 100.00);
186 else
187 zipstats.out_ratio = 0;
188
189 memcpy(&server_p->localClient->zipstats, &zipstats, sizeof(struct ZipStats));
190 }
191
192 void
193 collect_zipstats(void *unused)
194 {
195 dlink_node *ptr = NULL;
196
197 DLINK_FOREACH(ptr, serv_list.head)
198 {
199 struct Client *target_p = ptr->data;
200
201 if (IsCapable(target_p, CAP_ZIP))
202 {
203 /* only bother if we haven't already got something queued... */
204 if (!target_p->localClient->slinkq)
205 {
206 target_p->localClient->slinkq = MyMalloc(1); /* sigh.. */
207 target_p->localClient->slinkq[0] = SLINKCMD_ZIPSTATS;
208 target_p->localClient->slinkq_ofs = 0;
209 target_p->localClient->slinkq_len = 1;
210 send_queued_slink_write(target_p);
211 }
212 }
213 }
214 }
215
216 #ifdef HAVE_LIBCRYPTO
217 struct EncCapability *
218 check_cipher(struct Client *client_p, struct AccessItem *aconf)
219 {
220 struct EncCapability *epref = NULL;
221
222 /* Use connect{} specific info if available */
223 if (aconf->cipher_preference)
224 epref = aconf->cipher_preference;
225 else if (ConfigFileEntry.default_cipher_preference)
226 epref = ConfigFileEntry.default_cipher_preference;
227
228 /*
229 * If the server supports the capability in hand, return the matching
230 * conf struct. Otherwise, return NULL (an error).
231 */
232 if (epref && IsCapableEnc(client_p, epref->cap))
233 return epref;
234
235 return NULL;
236 }
237 #endif /* HAVE_LIBCRYPTO */
238
239 /* my_name_for_link()
240 * return wildcard name of my server name
241 * according to given config entry --Jto
242 */
243 const char *
244 my_name_for_link(struct ConfItem *conf)
245 {
246 struct AccessItem *aconf;
247
248 aconf = (struct AccessItem *)map_to_conf(conf);
249 if (aconf->fakename != NULL)
250 return aconf->fakename;
251 else
252 return me.name;
253 }
254
255 /*
256 * write_links_file
257 *
258 * inputs - void pointer which is not used
259 * output - NONE
260 * side effects - called from an event, write out list of linked servers
261 * but in no particular order.
262 */
263 void
264 write_links_file(void* notused)
265 {
266 MessageFileLine *next_mptr = 0;
267 MessageFileLine *mptr = 0;
268 MessageFileLine *currentMessageLine = 0;
269 MessageFileLine *newMessageLine = 0;
270 MessageFile *MessageFileptr;
271 const char *p;
272 FBFILE *file;
273 char buff[512];
274 dlink_node *ptr;
275
276 MessageFileptr = &ConfigFileEntry.linksfile;
277
278 if ((file = fbopen(MessageFileptr->fileName, "w")) == NULL)
279 return;
280
281 for (mptr = MessageFileptr->contentsOfFile; mptr; mptr = next_mptr)
282 {
283 next_mptr = mptr->next;
284 MyFree(mptr);
285 }
286
287 MessageFileptr->contentsOfFile = NULL;
288 currentMessageLine = NULL;
289
290 DLINK_FOREACH(ptr, global_serv_list.head)
291 {
292 size_t nbytes = 0;
293 struct Client *target_p = ptr->data;
294
295 /* skip ourselves, we send ourselves in /links */
296 if (IsMe(target_p))
297 continue;
298
299 /* skip hidden servers */
300 if (IsHidden(target_p) && !ConfigServerHide.disable_hidden)
301 continue;
302
303 if (target_p->info[0])
304 p = target_p->info;
305 else
306 p = "(Unknown Location)";
307
308 newMessageLine = MyMalloc(sizeof(MessageFileLine));
309
310 /* Attempt to format the file in such a way it follows the usual links output
311 * ie "servername uplink :hops info"
312 * Mostly for aesthetic reasons - makes it look pretty in mIRC ;)
313 * - madmax
314 */
315
316 /*
317 * For now, check this ircsprintf wont overflow - it shouldnt on a
318 * default config but it is configurable..
319 * This should be changed to an snprintf at some point, but I'm wanting to
320 * know if this is a cause of a bug - cryogen
321 */
322 assert(strlen(target_p->name) + strlen(me.name) + 6 + strlen(p) <=
323 MESSAGELINELEN);
324 ircsprintf(newMessageLine->line, "%s %s :1 %s",
325 target_p->name, me.name, p);
326 newMessageLine->next = NULL;
327
328 if (MessageFileptr->contentsOfFile)
329 {
330 if (currentMessageLine)
331 currentMessageLine->next = newMessageLine;
332 currentMessageLine = newMessageLine;
333 }
334 else
335 {
336 MessageFileptr->contentsOfFile = newMessageLine;
337 currentMessageLine = newMessageLine;
338 }
339
340 nbytes = ircsprintf(buff, "%s %s :1 %s\n", target_p->name, me.name, p);
341 fbputs(buff, file, nbytes);
342 }
343
344 fbclose(file);
345 }
346
347 /* hunt_server()
348 * Do the basic thing in delivering the message (command)
349 * across the relays to the specific server (server) for
350 * actions.
351 *
352 * Note: The command is a format string and *MUST* be
353 * of prefixed style (e.g. ":%s COMMAND %s ...").
354 * Command can have only max 8 parameters.
355 *
356 * server parv[server] is the parameter identifying the
357 * target server.
358 *
359 * *WARNING*
360 * parv[server] is replaced with the pointer to the
361 * real servername from the matched client (I'm lazy
362 * now --msa).
363 *
364 * returns: (see #defines)
365 */
366 int
367 hunt_server(struct Client *client_p, struct Client *source_p, const char *command,
368 int server, int parc, char *parv[])
369 {
370 struct Client *target_p = NULL;
371 struct Client *target_tmp = NULL;
372 dlink_node *ptr;
373 int wilds;
374
375 /* Assume it's me, if no server
376 */
377 if (parc <= server || EmptyString(parv[server]) ||
378 match(me.name, parv[server]) ||
379 match(parv[server], me.name) ||
380 !strcmp(parv[server], me.id))
381 return(HUNTED_ISME);
382
383 /* These are to pickup matches that would cause the following
384 * message to go in the wrong direction while doing quick fast
385 * non-matching lookups.
386 */
387 if (MyClient(source_p))
388 target_p = find_client(parv[server]);
389 else
390 target_p = find_person(client_p, parv[server]);
391
392 if (target_p)
393 if (target_p->from == source_p->from && !MyConnect(target_p))
394 target_p = NULL;
395
396 if (target_p == NULL && (target_p = find_server(parv[server])))
397 if (target_p->from == source_p->from && !MyConnect(target_p))
398 target_p = NULL;
399
400 collapse(parv[server]);
401 wilds = (strchr(parv[server], '?') || strchr(parv[server], '*'));
402
403 /* Again, if there are no wild cards involved in the server
404 * name, use the hash lookup
405 */
406 if (target_p == NULL)
407 {
408 if (!wilds)
409 {
410 if (!(target_p = find_server(parv[server])))
411 {
412 sendto_one(source_p, form_str(ERR_NOSUCHSERVER),
413 me.name, parv[0], parv[server]);
414 return(HUNTED_NOSUCH);
415 }
416 }
417 else
418 {
419 DLINK_FOREACH(ptr, global_client_list.head)
420 {
421 target_tmp = ptr->data;
422
423 if (match(parv[server], target_tmp->name))
424 {
425 if (target_tmp->from == source_p->from && !MyConnect(target_tmp))
426 continue;
427 target_p = ptr->data;
428
429 if (IsRegistered(target_p) && (target_p != client_p))
430 break;
431 }
432 }
433 }
434 }
435
436 if (target_p != NULL)
437 {
438 if(!IsRegistered(target_p))
439 {
440 sendto_one(source_p, form_str(ERR_NOSUCHSERVER),
441 me.name, parv[0], parv[server]);
442 return HUNTED_NOSUCH;
443 }
444
445 if (IsMe(target_p) || MyClient(target_p))
446 return HUNTED_ISME;
447
448 if (!match(target_p->name, parv[server]))
449 parv[server] = target_p->name;
450
451 /* This is a little kludgy but should work... */
452 if (IsClient(source_p) &&
453 ((MyConnect(target_p) && IsCapable(target_p, CAP_TS6)) ||
454 (!MyConnect(target_p) && IsCapable(target_p->from, CAP_TS6))))
455 parv[0] = ID(source_p);
456
457 sendto_one(target_p, command, parv[0],
458 parv[1], parv[2], parv[3], parv[4],
459 parv[5], parv[6], parv[7], parv[8]);
460 return(HUNTED_PASS);
461 }
462
463 sendto_one(source_p, form_str(ERR_NOSUCHSERVER),
464 me.name, parv[0], parv[server]);
465 return(HUNTED_NOSUCH);
466 }
467
468 /* try_connections()
469 *
470 * inputs - void pointer which is not used
471 * output - NONE
472 * side effects -
473 * scan through configuration and try new connections.
474 * Returns the calendar time when the next call to this
475 * function should be made latest. (No harm done if this
476 * is called earlier or later...)
477 */
478 void
479 try_connections(void *unused)
480 {
481 dlink_node *ptr;
482 struct ConfItem *conf;
483 struct AccessItem *aconf;
484 struct ClassItem *cltmp;
485 int confrq;
486
487 /* TODO: change this to set active flag to 0 when added to event! --Habeeb */
488 if (GlobalSetOptions.autoconn == 0)
489 return;
490
491 DLINK_FOREACH(ptr, server_items.head)
492 {
493 conf = ptr->data;
494 aconf = map_to_conf(conf);
495
496 /* Also when already connecting! (update holdtimes) --SRB
497 */
498 if (!(aconf->status & CONF_SERVER) || !aconf->port ||
499 !(IsConfAllowAutoConn(aconf)))
500 continue;
501
502 cltmp = map_to_conf(aconf->class_ptr);
503
504 /* Skip this entry if the use of it is still on hold until
505 * future. Otherwise handle this entry (and set it on hold
506 * until next time). Will reset only hold times, if already
507 * made one successfull connection... [this algorithm is
508 * a bit fuzzy... -- msa >;) ]
509 */
510 if (aconf->hold > CurrentTime)
511 continue;
512
513 if (cltmp == NULL)
514 confrq = DEFAULT_CONNECTFREQUENCY;
515 else
516 {
517 confrq = ConFreq(cltmp);
518 if (confrq < MIN_CONN_FREQ )
519 confrq = MIN_CONN_FREQ;
520 }
521
522 aconf->hold = CurrentTime + confrq;
523
524 /* Found a CONNECT config with port specified, scan clients
525 * and see if this server is already connected?
526 */
527 if (find_server(conf->name) != NULL)
528 continue;
529
530 if (CurrUserCount(cltmp) < MaxTotal(cltmp))
531 {
532 /* Go to the end of the list, if not already last */
533 if (ptr->next != NULL)
534 {
535 dlinkDelete(ptr, &server_items);
536 dlinkAddTail(conf, &conf->node, &server_items);
537 }
538
539 if (find_servconn_in_progress(conf->name))
540 return;
541
542 /* We used to only print this if serv_connect() actually
543 * succeeded, but since comm_tcp_connect() can call the callback
544 * immediately if there is an error, we were getting error messages
545 * in the wrong order. SO, we just print out the activated line,
546 * and let serv_connect() / serv_connect_callback() print an
547 * error afterwards if it fails.
548 * -- adrian
549 */
550 if (ConfigServerHide.hide_server_ips)
551 sendto_realops_flags(UMODE_ALL, L_ALL, "Connection to %s activated.",
552 conf->name);
553 else
554 sendto_realops_flags(UMODE_ALL, L_ALL, "Connection to %s[%s] activated.",
555 conf->name, aconf->host);
556
557 serv_connect(aconf, NULL);
558 /* We connect only one at time... */
559 return;
560 }
561 }
562 }
563
564 int
565 check_server(const char *name, struct Client *client_p, int cryptlink)
566 {
567 dlink_node *ptr;
568 struct ConfItem *conf = NULL;
569 struct ConfItem *server_conf = NULL;
570 struct AccessItem *server_aconf = NULL;
571 struct AccessItem *aconf = NULL;
572 int error = -1;
573
574 assert(client_p != NULL);
575
576 if (client_p == NULL)
577 return(error);
578
579 if (strlen(name) > HOSTLEN)
580 return(-4);
581
582 /* loop through looking for all possible connect items that might work */
583 DLINK_FOREACH(ptr, server_items.head)
584 {
585 conf = ptr->data;
586 aconf = map_to_conf(conf);
587
588 if (!match(name, conf->name))
589 continue;
590
591 error = -3;
592
593 /* XXX: Fix me for IPv6 */
594 /* XXX sockhost is the IPv4 ip as a string */
595 if (match(aconf->host, client_p->host) ||
596 match(aconf->host, client_p->sockhost))
597 {
598 error = -2;
599 #ifdef HAVE_LIBCRYPTO
600 if (cryptlink && IsConfCryptLink(aconf))
601 {
602 if (aconf->rsa_public_key)
603 server_conf = conf;
604 }
605 else if (!(cryptlink || IsConfCryptLink(aconf)))
606 #endif /* HAVE_LIBCRYPTO */
607 {
608 /* A NULL password is as good as a bad one */
609 if (EmptyString(client_p->localClient->passwd))
610 return(-2);
611
612 /* code in s_conf.c should not have allowed this to be NULL */
613 if (aconf->passwd == NULL)
614 return(-2);
615
616 if (IsConfEncrypted(aconf))
617 {
618 if (strcmp(aconf->passwd,
619 (const char *)crypt(client_p->localClient->passwd,
620 aconf->passwd)) == 0)
621 server_conf = conf;
622 }
623 else
624 {
625 if (strcmp(aconf->passwd, client_p->localClient->passwd) == 0)
626 server_conf = conf;
627 }
628 }
629 }
630 }
631
632 if (server_conf == NULL)
633 return(error);
634
635 attach_conf(client_p, server_conf);
636
637 /* Now find all leaf or hub config items for this server */
638 DLINK_FOREACH(ptr, hub_items.head)
639 {
640 conf = ptr->data;
641
642 if (!match(name, conf->name))
643 continue;
644 attach_conf(client_p, conf);
645 }
646
647 DLINK_FOREACH(ptr, leaf_items.head)
648 {
649 conf = ptr->data;
650
651 if (!match(name, conf->name))
652 continue;
653 attach_conf(client_p, conf);
654 }
655
656 server_aconf = map_to_conf(server_conf);
657
658 #ifdef HAVE_LIBZ /* otherwise, clear it unconditionally */
659 if (!IsConfCompressed(server_aconf))
660 #endif
661 ClearCap(client_p, CAP_ZIP);
662 if (!IsConfCryptLink(server_aconf))
663 ClearCap(client_p, CAP_ENC);
664 if (!IsConfTopicBurst(server_aconf))
665 {
666 ClearCap(client_p, CAP_TB);
667 ClearCap(client_p, CAP_TBURST);
668 }
669
670 /* Don't unset CAP_HUB here even if the server isn't a hub,
671 * it only indicates if the server thinks it's lazylinks are
672 * leafs or not.. if you unset it, bad things will happen
673 */
674 if (aconf != NULL)
675 {
676 struct sockaddr_in *v4;
677 #ifdef IPV6
678 struct sockaddr_in6 *v6;
679 #endif
680 switch (aconf->aftype)
681 {
682 #ifdef IPV6
683 case AF_INET6:
684 v6 = (struct sockaddr_in6 *)&aconf->ipnum;
685
686 if (IN6_IS_ADDR_UNSPECIFIED(&v6->sin6_addr))
687 memcpy(&aconf->ipnum, &client_p->localClient->ip, sizeof(struct irc_ssaddr));
688 break;
689 #endif
690 case AF_INET:
691 v4 = (struct sockaddr_in *)&aconf->ipnum;
692
693 if (v4->sin_addr.s_addr == INADDR_NONE)
694 memcpy(&aconf->ipnum, &client_p->localClient->ip, sizeof(struct irc_ssaddr));
695 break;
696 }
697 }
698
699 return(0);
700 }
701
702 /* add_capability()
703 *
704 * inputs - string name of CAPAB
705 * - int flag of capability
706 * output - NONE
707 * side effects - Adds given capability name and bit mask to
708 * current supported capabilities. This allows
709 * modules to dynamically add or subtract their capability.
710 */
711 void
712 add_capability(const char *capab_name, int cap_flag, int add_to_default)
713 {
714 struct Capability *cap = MyMalloc(sizeof(*cap));
715
716 DupString(cap->name, capab_name);
717 cap->cap = cap_flag;
718 dlinkAdd(cap, &cap->node, &cap_list);
719
720 if (add_to_default)
721 default_server_capabs |= cap_flag;
722 }
723
724 /* delete_capability()
725 *
726 * inputs - string name of CAPAB
727 * output - NONE
728 * side effects - delete given capability from ones known.
729 */
730 int
731 delete_capability(const char *capab_name)
732 {
733 dlink_node *ptr;
734 dlink_node *next_ptr;
735 struct Capability *cap;
736
737 DLINK_FOREACH_SAFE(ptr, next_ptr, cap_list.head)
738 {
739 cap = ptr->data;
740
741 if (cap->cap != 0)
742 {
743 if (irccmp(cap->name, capab_name) == 0)
744 {
745 default_server_capabs &= ~(cap->cap);
746 dlinkDelete(ptr, &cap_list);
747 MyFree(cap->name);
748 cap->name = NULL;
749 MyFree(cap);
750 }
751 }
752 }
753
754 return 0;
755 }
756
757 /*
758 * find_capability()
759 *
760 * inputs - string name of capab to find
761 * output - 0 if not found CAPAB otherwise
762 * side effects - none
763 */
764 int
765 find_capability(const char *capab)
766 {
767 const dlink_node *ptr = NULL;
768
769 DLINK_FOREACH(ptr, cap_list.head)
770 {
771 const struct Capability *cap = ptr->data;
772
773 if (cap->cap && !irccmp(cap->name, capab))
774 return cap->cap;
775 }
776
777 return 0;
778 }
779
780 /* send_capabilities()
781 *
782 * inputs - Client pointer to send to
783 * - Pointer to AccessItem (for crypt)
784 * - int flag of capabilities that this server can send
785 * - int flag of encryption capabilities
786 * output - NONE
787 * side effects - send the CAPAB line to a server -orabidoo
788 *
789 */
790 void
791 send_capabilities(struct Client *client_p, struct AccessItem *aconf,
792 int cap_can_send, int enc_can_send)
793 {
794 struct Capability *cap=NULL;
795 char msgbuf[IRCD_BUFSIZE];
796 char *t;
797 int tl;
798 dlink_node *ptr;
799 #ifdef HAVE_LIBCRYPTO
800 const struct EncCapability *epref = NULL;
801 char *capend;
802 int sent_cipher = 0;
803 #endif
804
805 t = msgbuf;
806
807 DLINK_FOREACH(ptr, cap_list.head)
808 {
809 cap = ptr->data;
810
811 if (cap->cap & (cap_can_send|default_server_capabs))
812 {
813 tl = ircsprintf(t, "%s ", cap->name);
814 t += tl;
815 }
816 }
817 #ifdef HAVE_LIBCRYPTO
818 if (enc_can_send)
819 {
820 capend = t;
821 strcpy(t, "ENC:");
822 t += 4;
823
824 /* use connect{} specific info if available */
825 if (aconf->cipher_preference)
826 epref = aconf->cipher_preference;
827 else if (ConfigFileEntry.default_cipher_preference)
828 epref = ConfigFileEntry.default_cipher_preference;
829
830 if (epref && (epref->cap & enc_can_send))
831 {
832 /* Leave the space -- it is removed later. */
833 tl = ircsprintf(t, "%s ", epref->name);
834 t += tl;
835 sent_cipher = 1;
836 }
837
838 if (!sent_cipher)
839 t = capend; /* truncate string before ENC:, below */
840 }
841 #endif
842 *(t - 1) = '\0';
843 sendto_one(client_p, "CAPAB :%s", msgbuf);
844 }
845
846 /* sendnick_TS()
847 *
848 * inputs - client (server) to send nick towards
849 * - client to send nick for
850 * output - NONE
851 * side effects - NICK message is sent towards given client_p
852 */
853 void
854 sendnick_TS(struct Client *client_p, struct Client *target_p)
855 {
856 static char ubuf[12];
857
858 if (!IsClient(target_p))
859 return;
860
861 send_umode(NULL, target_p, 0, IsOperHiddenAdmin(target_p) ?
862 SEND_UMODES & ~UMODE_ADMIN : SEND_UMODES, ubuf);
863
864 if (ubuf[0] == '\0')
865 {
866 ubuf[0] = '+';
867 ubuf[1] = '\0';
868 }
869
870 /* XXX Both of these need to have a :me.name or :mySID!?!?! */
871 if (HasID(target_p) && IsCapable(client_p, CAP_TS6))
872 sendto_one(client_p, ":%s UID %s %d %lu %s %s %s %s %s :%s",
873 target_p->servptr->id,
874 target_p->name, target_p->hopcount + 1,
875 (unsigned long) target_p->tsinfo,
876 ubuf, target_p->username, target_p->host,
877 (MyClient(target_p) && IsIPSpoof(target_p)) ?
878 "0" : target_p->sockhost, target_p->id, target_p->info);
879 else
880 sendto_one(client_p, "NICK %s %d %lu %s %s %s %s :%s",
881 target_p->name, target_p->hopcount + 1,
882 (unsigned long) target_p->tsinfo,
883 ubuf, target_p->username, target_p->host,
884 target_p->servptr->name, target_p->info);
885
886 if (IsConfAwayBurst((struct AccessItem *)map_to_conf(client_p->serv->sconf)))
887 if (!EmptyString(target_p->away))
888 sendto_one(client_p, ":%s AWAY :%s", target_p->name,
889 target_p->away);
890
891 }
892
893 /*
894 * show_capabilities - show current server capabilities
895 *
896 * inputs - pointer to a struct Client
897 * output - pointer to static string
898 * side effects - build up string representing capabilities of server listed
899 */
900 const char *
901 show_capabilities(struct Client *target_p)
902 {
903 static char msgbuf[IRCD_BUFSIZE];
904 char *t = msgbuf;
905 dlink_node *ptr;
906
907 t += ircsprintf(msgbuf, "TS ");
908
909 DLINK_FOREACH(ptr, cap_list.head)
910 {
911 const struct Capability *cap = ptr->data;
912
913 if (IsCapable(target_p, cap->cap))
914 t += ircsprintf(t, "%s ", cap->name);
915 }
916 #ifdef HAVE_LIBCRYPTO
917 if (IsCapable(target_p, CAP_ENC) &&
918 target_p->localClient->in_cipher &&
919 target_p->localClient->out_cipher)
920 t += ircsprintf(t, "ENC:%s ",
921 target_p->localClient->in_cipher->name);
922 #endif
923 *(t - 1) = '\0';
924
925 return(msgbuf);
926 }
927
928 /* make_server()
929 *
930 * inputs - pointer to client struct
931 * output - pointer to struct Server
932 * side effects - add's an Server information block to a client
933 * if it was not previously allocated.
934 */
935 struct Server *
936 make_server(struct Client *client_p)
937 {
938 if (client_p->serv == NULL)
939 client_p->serv = MyMalloc(sizeof(struct Server));
940
941 return client_p->serv;
942 }
943
944 /* server_estab()
945 *
946 * inputs - pointer to a struct Client
947 * output -
948 * side effects -
949 */
950 void
951 server_estab(struct Client *client_p)
952 {
953 struct Client *target_p;
954 struct ConfItem *conf;
955 struct AccessItem *aconf=NULL;
956 char *host;
957 const char *inpath;
958 static char inpath_ip[HOSTLEN * 2 + USERLEN + 6];
959 dlink_node *m;
960 dlink_node *ptr;
961
962 assert(client_p != NULL);
963
964 strlcpy(inpath_ip, get_client_name(client_p, SHOW_IP), sizeof(inpath_ip));
965
966 inpath = get_client_name(client_p, MASK_IP); /* "refresh" inpath with host */
967 host = client_p->name;
968
969 if ((conf = find_conf_name(&client_p->localClient->confs, host, SERVER_TYPE))
970 == NULL)
971 {
972 /* This shouldn't happen, better tell the ops... -A1kmm */
973 sendto_realops_flags(UMODE_ALL, L_ALL, "Warning: Lost connect{} block "
974 "for server %s(this shouldn't happen)!", host);
975 exit_client(client_p, &me, "Lost connect{} block!");
976 return;
977 }
978
979 MyFree(client_p->localClient->passwd);
980 client_p->localClient->passwd = NULL;
981
982 /* Its got identd, since its a server */
983 SetGotId(client_p);
984
985 /* If there is something in the serv_list, it might be this
986 * connecting server..
987 */
988 if (!ServerInfo.hub && serv_list.head)
989 {
990 if (client_p != serv_list.head->data || serv_list.head->next)
991 {
992 ++ServerStats.is_ref;
993 sendto_one(client_p, "ERROR :I'm a leaf not a hub");
994 exit_client(client_p, &me, "I'm a leaf");
995 return;
996 }
997 }
998
999 aconf = (struct AccessItem *)map_to_conf(conf);
1000
1001 if (IsUnknown(client_p) && !IsConfCryptLink(aconf))
1002 {
1003 /* jdc -- 1. Use EmptyString(), not [0] index reference.
1004 * 2. Check aconf->spasswd, not aconf->passwd.
1005 */
1006 if (!EmptyString(aconf->spasswd))
1007 {
1008 /* only send ts6 format PASS if we have ts6 enabled */
1009 if (me.id[0] != '\0') /* Send TS 6 form only if id */
1010 sendto_one(client_p, "PASS %s TS %d %s",
1011 aconf->spasswd, TS_CURRENT, me.id);
1012 else
1013 sendto_one(client_p, "PASS %s TS 5",
1014 aconf->spasswd);
1015 }
1016
1017 /* Pass my info to the new server
1018 *
1019 * If this is a HUB, pass on CAP_HUB
1020 * Pass on ZIP if supported
1021 * Pass on TB if supported.
1022 * - Dianora
1023 */
1024
1025 send_capabilities(client_p, aconf, (ServerInfo.hub ? CAP_HUB : 0)
1026 | (IsConfCompressed(aconf) ? CAP_ZIP : 0)
1027 | (IsConfTopicBurst(aconf) ? CAP_TBURST|CAP_TB : 0), 0);
1028
1029 /* SERVER is the last command sent before switching to ziplinks.
1030 * We set TCPNODELAY on the socket to make sure it gets sent out
1031 * on the wire immediately. Otherwise, it could be sitting in
1032 * a kernel buffer when we start sending zipped data, and the
1033 * parser on the receiving side can't hand both unzipped and zipped
1034 * data in one packet. --Rodder
1035 *
1036 * currently we only need to call send_queued_write,
1037 * Nagle is already disabled at this point --adx
1038 */
1039 sendto_one(client_p, "SERVER %s 1 :%s%s",
1040 my_name_for_link(conf),
1041 ConfigServerHide.hidden ? "(H) " : "",
1042 (me.info[0]) ? (me.info) : "IRCers United");
1043 send_queued_write(client_p);
1044 }
1045
1046 /* Hand the server off to servlink now */
1047 if (IsCapable(client_p, CAP_ENC) || IsCapable(client_p, CAP_ZIP))
1048 {
1049 if (fork_server(client_p) < 0)
1050 {
1051 sendto_realops_flags(UMODE_ALL, L_ADMIN,
1052 "Warning: fork failed for server %s -- check servlink_path (%s)",
1053 get_client_name(client_p, HIDE_IP), ConfigFileEntry.servlink_path);
1054 sendto_realops_flags(UMODE_ALL, L_OPER, "Warning: fork failed for server "
1055 "%s -- check servlink_path (%s)",
1056 get_client_name(client_p, MASK_IP),
1057 ConfigFileEntry.servlink_path);
1058 exit_client(client_p, &me, "fork failed");
1059 return;
1060 }
1061
1062 start_io(client_p);
1063 SetServlink(client_p);
1064 }
1065
1066 /* only send ts6 format SVINFO if we have ts6 enabled */
1067 sendto_one(client_p, "SVINFO %d %d 0 :%lu",
1068 (me.id[0] ? TS_CURRENT : 5), TS_MIN,
1069 (unsigned long)CurrentTime);
1070
1071 /* assumption here is if they passed the correct TS version, they also passed an SID */
1072 if (IsCapable(client_p, CAP_TS6))
1073 hash_add_id(client_p);
1074
1075 /* XXX Does this ever happen? I don't think so -db */
1076 detach_conf(client_p, OPER_TYPE);
1077
1078 /* *WARNING*
1079 ** In the following code in place of plain server's
1080 ** name we send what is returned by get_client_name
1081 ** which may add the "sockhost" after the name. It's
1082 ** *very* *important* that there is a SPACE between
1083 ** the name and sockhost (if present). The receiving
1084 ** server will start the information field from this
1085 ** first blank and thus puts the sockhost into info.
1086 ** ...a bit tricky, but you have been warned, besides
1087 ** code is more neat this way... --msa
1088 */
1089 client_p->servptr = &me;
1090
1091 if (IsClosing(client_p))
1092 return;
1093
1094 SetServer(client_p);
1095
1096 /* Update the capability combination usage counts. -A1kmm */
1097 set_chcap_usage_counts(client_p);
1098
1099 /* Some day, all these lists will be consolidated *sigh* */
1100 dlinkAdd(client_p, &client_p->lnode, &me.serv->server_list);
1101
1102 m = dlinkFind(&unknown_list, client_p);
1103 assert(NULL != m);
1104
1105 dlinkDelete(m, &unknown_list);
1106 dlinkAdd(client_p, m, &serv_list);
1107
1108 Count.myserver++;
1109
1110 dlinkAdd(client_p, make_dlink_node(), &global_serv_list);
1111 hash_add_client(client_p);
1112
1113 /* doesnt duplicate client_p->serv if allocated this struct already */
1114 make_server(client_p);
1115
1116 /* fixing eob timings.. -gnp */
1117 client_p->firsttime = CurrentTime;
1118
1119 /* Show the real host/IP to admins */
1120 sendto_realops_flags(UMODE_ALL, L_ADMIN,
1121 "Link with %s established: (%s) link",
1122 inpath_ip,show_capabilities(client_p));
1123 /* Now show the masked hostname/IP to opers */
1124 sendto_realops_flags(UMODE_ALL, L_OPER,
1125 "Link with %s established: (%s) link",
1126 inpath,show_capabilities(client_p));
1127 ilog(L_NOTICE, "Link with %s established: (%s) link",
1128 inpath_ip, show_capabilities(client_p));
1129
1130 client_p->serv->sconf = conf;
1131
1132 if (HasServlink(client_p))
1133 {
1134 /* we won't overflow FD_DESC_SZ here, as it can hold
1135 * client_p->name + 64
1136 */
1137 fd_note(&client_p->localClient->fd, "slink data: %s", client_p->name);
1138 fd_note(&client_p->localClient->ctrlfd, "slink ctrl: %s", client_p->name);
1139 }
1140 else
1141 fd_note(&client_p->localClient->fd, "Server: %s", client_p->name);
1142
1143 /* Old sendto_serv_but_one() call removed because we now
1144 ** need to send different names to different servers
1145 ** (domain name matching) Send new server to other servers.
1146 */
1147 DLINK_FOREACH(ptr, serv_list.head)
1148 {
1149 target_p = ptr->data;
1150
1151 if (target_p == client_p)
1152 continue;
1153
1154 if ((conf = target_p->serv->sconf) &&
1155 match(my_name_for_link(conf), client_p->name))
1156 continue;
1157
1158 if (IsCapable(target_p, CAP_TS6) && HasID(client_p))
1159 sendto_one(target_p, ":%s SID %s 2 %s :%s%s",
1160 me.id, client_p->name, client_p->id,
1161 IsHidden(client_p) ? "(H) " : "",
1162 client_p->info);
1163 else
1164 sendto_one(target_p,":%s SERVER %s 2 :%s%s",
1165 me.name, client_p->name,
1166 IsHidden(client_p) ? "(H) " : "",
1167 client_p->info);
1168 }
1169
1170 /* Pass on my client information to the new server
1171 **
1172 ** First, pass only servers (idea is that if the link gets
1173 ** cancelled beacause the server was already there,
1174 ** there are no NICK's to be cancelled...). Of course,
1175 ** if cancellation occurs, all this info is sent anyway,
1176 ** and I guess the link dies when a read is attempted...? --msa
1177 **
1178 ** Note: Link cancellation to occur at this point means
1179 ** that at least two servers from my fragment are building
1180 ** up connection this other fragment at the same time, it's
1181 ** a race condition, not the normal way of operation...
1182 **
1183 ** ALSO NOTE: using the get_client_name for server names--
1184 ** see previous *WARNING*!!! (Also, original inpath
1185 ** is destroyed...)
1186 */
1187
1188 conf = client_p->serv->sconf;
1189
1190 DLINK_FOREACH_PREV(ptr, global_serv_list.tail)
1191 {
1192 target_p = ptr->data;
1193
1194 /* target_p->from == target_p for target_p == client_p */
1195 if (target_p->from == client_p)
1196 continue;
1197
1198 if (match(my_name_for_link(conf), target_p->name))
1199 continue;
1200
1201 if (IsCapable(client_p, CAP_TS6))
1202 {
1203 if (HasID(target_p))
1204 sendto_one(client_p, ":%s SID %s %d %s :%s%s",
1205 ID(target_p->servptr), target_p->name, target_p->hopcount+1,
1206 target_p->id, IsHidden(target_p) ? "(H) " : "",
1207 target_p->info);
1208 else /* introducing non-ts6 server */
1209 sendto_one(client_p, ":%s SERVER %s %d :%s%s",
1210 ID(target_p->servptr), target_p->name, target_p->hopcount+1,
1211 IsHidden(target_p) ? "(H) " : "", target_p->info);
1212 }
1213 else
1214 sendto_one(client_p, ":%s SERVER %s %d :%s%s",
1215 target_p->servptr->name, target_p->name, target_p->hopcount+1,
1216 IsHidden(target_p) ? "(H) " : "", target_p->info);
1217 }
1218
1219 server_burst(client_p);
1220 }
1221
1222 static void
1223 start_io(struct Client *server)
1224 {
1225 struct LocalUser *lserver = server->localClient;
1226 int alloclen = 1;
1227 char *buf;
1228 dlink_node *ptr;
1229 struct dbuf_block *block;
1230
1231 /* calculate how many bytes to allocate */
1232 if (IsCapable(server, CAP_ZIP))
1233 alloclen += 6;
1234 #ifdef HAVE_LIBCRYPTO
1235 if (IsCapable(server, CAP_ENC))
1236 alloclen += 16 + lserver->in_cipher->keylen + lserver->out_cipher->keylen;
1237 #endif
1238 alloclen += dbuf_length(&lserver->buf_recvq);
1239 alloclen += dlink_list_length(&lserver->buf_recvq.blocks) * 3;
1240 alloclen += dbuf_length(&lserver->buf_sendq);
1241 alloclen += dlink_list_length(&lserver->buf_sendq.blocks) * 3;
1242
1243 /* initialize servlink control sendq */
1244 lserver->slinkq = buf = MyMalloc(alloclen);
1245 lserver->slinkq_ofs = 0;
1246 lserver->slinkq_len = alloclen;
1247
1248 if (IsCapable(server, CAP_ZIP))
1249 {
1250 /* ziplink */
1251 *buf++ = SLINKCMD_SET_ZIP_OUT_LEVEL;
1252 *buf++ = 0; /* | */
1253 *buf++ = 1; /* \ len is 1 */
1254 *buf++ = ConfigFileEntry.compression_level;
1255 *buf++ = SLINKCMD_START_ZIP_IN;
1256 *buf++ = SLINKCMD_START_ZIP_OUT;
1257 }
1258 #ifdef HAVE_LIBCRYPTO
1259 if (IsCapable(server, CAP_ENC))
1260 {
1261 /* Decryption settings */
1262 *buf++ = SLINKCMD_SET_CRYPT_IN_CIPHER;
1263 *buf++ = 0; /* / (upper 8-bits of len) */
1264 *buf++ = 1; /* \ cipher id is 1 byte (lower 8-bits of len) */
1265 *buf++ = lserver->in_cipher->cipherid;
1266 *buf++ = SLINKCMD_SET_CRYPT_IN_KEY;
1267 *buf++ = 0; /* keylen < 256 */
1268 *buf++ = lserver->in_cipher->keylen;
1269 memcpy(buf, lserver->in_key, lserver->in_cipher->keylen);
1270 buf += lserver->in_cipher->keylen;
1271 /* Encryption settings */
1272 *buf++ = SLINKCMD_SET_CRYPT_OUT_CIPHER;
1273 *buf++ = 0; /* / (upper 8-bits of len) */
1274 *buf++ = 1; /* \ cipher id is 1 byte (lower 8-bits of len) */
1275 *buf++ = lserver->out_cipher->cipherid;
1276 *buf++ = SLINKCMD_SET_CRYPT_OUT_KEY;
1277 *buf++ = 0; /* keylen < 256 */
1278 *buf++ = lserver->out_cipher->keylen;
1279 memcpy(buf, lserver->out_key, lserver->out_cipher->keylen);
1280 buf += lserver->out_cipher->keylen;
1281 *buf++ = SLINKCMD_START_CRYPT_IN;
1282 *buf++ = SLINKCMD_START_CRYPT_OUT;
1283 }
1284 #endif
1285
1286 /* pass the whole recvq to servlink */
1287 DLINK_FOREACH (ptr, lserver->buf_recvq.blocks.head)
1288 {
1289 block = ptr->data;
1290 *buf++ = SLINKCMD_INJECT_RECVQ;
1291 *buf++ = (block->size >> 8);
1292 *buf++ = (block->size & 0xff);
1293 memcpy(buf, &block->data[0], block->size);
1294 buf += block->size;
1295 }
1296
1297 dbuf_clear(&lserver->buf_recvq);
1298
1299 /* pass the whole sendq to servlink */
1300 DLINK_FOREACH (ptr, lserver->buf_sendq.blocks.head)
1301 {
1302 block = ptr->data;
1303 *buf++ = SLINKCMD_INJECT_SENDQ;
1304 *buf++ = (block->size >> 8);
1305 *buf++ = (block->size & 0xff);
1306 memcpy(buf, &block->data[0], block->size);
1307 buf += block->size;
1308 }
1309
1310 dbuf_clear(&lserver->buf_sendq);
1311
1312 /* start io */
1313 *buf++ = SLINKCMD_INIT;
1314
1315 /* schedule a write */
1316 send_queued_slink_write(server);
1317 }
1318
1319 /* fork_server()
1320 *
1321 * inputs - struct Client *server
1322 * output - success: 0 / failure: -1
1323 * side effect - fork, and exec SERVLINK to handle this connection
1324 */
1325 static int
1326 fork_server(struct Client *server)
1327 {
1328 #ifndef HAVE_SOCKETPAIR
1329 return -1;
1330 #else
1331 int i;
1332 int slink_fds[2][2];
1333 /* 0? - ctrl | 1? - data
1334 * ?0 - child | ?1 - parent */
1335
1336 if (socketpair(AF_UNIX, SOCK_STREAM, 0, slink_fds[0]) < 0)
1337 return -1;
1338 if (socketpair(AF_UNIX, SOCK_STREAM, 0, slink_fds[1]) < 0)
1339 goto free_ctrl_fds;
1340
1341 if ((i = fork()) < 0)
1342 {
1343 close(slink_fds[1][0]); close(slink_fds[1][1]);
1344 free_ctrl_fds:
1345 close(slink_fds[0][0]); close(slink_fds[0][1]);
1346 return -1;
1347 }
1348
1349 if (i == 0)
1350 {
1351 char fd_str[3][6]; /* store 3x sizeof("65535") */
1352 char *kid_argv[7];
1353
1354 #ifdef O_ASYNC
1355 fcntl(server->localClient->fd.fd, F_SETFL,
1356 fcntl(server->localClient->fd.fd, F_GETFL, 0) & ~O_ASYNC);
1357 #endif
1358 close_fds(&server->localClient->fd);
1359 close(slink_fds[0][1]);
1360 close(slink_fds[1][1]);
1361
1362 sprintf(fd_str[0], "%d", slink_fds[0][0]);
1363 sprintf(fd_str[1], "%d", slink_fds[1][0]);
1364 sprintf(fd_str[2], "%d", server->localClient->fd.fd);
1365
1366 kid_argv[0] = "-slink";
1367 kid_argv[1] = kid_argv[2] = fd_str[0]; /* ctrl */
1368 kid_argv[3] = kid_argv[4] = fd_str[1]; /* data */
1369 kid_argv[5] = fd_str[2]; /* network */
1370 kid_argv[6] = NULL;
1371
1372 execv(ConfigFileEntry.servlink_path, kid_argv);
1373
1374 _exit(1);
1375 }
1376
1377 /* close the network fd and the child ends of the pipes */
1378 fd_close(&server->localClient->fd);
1379 close(slink_fds[0][0]);
1380 close(slink_fds[1][0]);
1381
1382 execute_callback(setup_socket_cb, slink_fds[0][1]);
1383 execute_callback(setup_socket_cb, slink_fds[1][1]);
1384
1385 fd_open(&server->localClient->ctrlfd, slink_fds[0][1], 1, "slink ctrl");
1386 fd_open(&server->localClient->fd, slink_fds[1][1], 1, "slink data");
1387
1388 read_ctrl_packet(&server->localClient->ctrlfd, server);
1389 read_packet(&server->localClient->fd, server);
1390
1391 return 0;
1392 #endif
1393 }
1394
1395 /* server_burst()
1396 *
1397 * inputs - struct Client pointer server
1398 * -
1399 * output - none
1400 * side effects - send a server burst
1401 * bugs - still too long
1402 */
1403 static void
1404 server_burst(struct Client *client_p)
1405 {
1406 /* Send it in the shortened format with the TS, if
1407 ** it's a TS server; walk the list of channels, sending
1408 ** all the nicks that haven't been sent yet for each
1409 ** channel, then send the channel itself -- it's less
1410 ** obvious than sending all nicks first, but on the
1411 ** receiving side memory will be allocated more nicely
1412 ** saving a few seconds in the handling of a split
1413 ** -orabidoo
1414 */
1415
1416 burst_all(client_p);
1417
1418 /* EOB stuff is now in burst_all */
1419 /* Always send a PING after connect burst is done */
1420 sendto_one(client_p, "PING :%s", ID_or_name(&me, client_p));
1421 }
1422
1423 /* burst_all()
1424 *
1425 * inputs - pointer to server to send burst to
1426 * output - NONE
1427 * side effects - complete burst of channels/nicks is sent to client_p
1428 */
1429 static void
1430 burst_all(struct Client *client_p)
1431 {
1432 dlink_node *ptr = NULL;
1433
1434 DLINK_FOREACH(ptr, global_channel_list.head)
1435 {
1436 struct Channel *chptr = ptr->data;
1437
1438 if (dlink_list_length(&chptr->members) != 0)
1439 {
1440 burst_members(client_p, chptr);
1441 send_channel_modes(client_p, chptr);
1442
1443 if (IsCapable(client_p, CAP_TBURST) ||
1444 IsCapable(client_p, CAP_TB))
1445 send_tb(client_p, chptr);
1446 }
1447 }
1448
1449 /* also send out those that are not on any channel
1450 */
1451 DLINK_FOREACH(ptr, global_client_list.head)
1452 {
1453 struct Client *target_p = ptr->data;
1454
1455 if (!IsBursted(target_p) && target_p->from != client_p)
1456 sendnick_TS(client_p, target_p);
1457
1458 ClearBursted(target_p);
1459 }
1460
1461 /* We send the time we started the burst, and let the remote host determine an EOB time,
1462 ** as otherwise we end up sending a EOB of 0 Sending here means it gets sent last -- fl
1463 */
1464 /* Its simpler to just send EOB and use the time its been connected.. --fl_ */
1465 if (IsCapable(client_p, CAP_EOB))
1466 sendto_one(client_p, ":%s EOB", ID_or_name(&me, client_p));
1467 }
1468
1469 /*
1470 * send_tb
1471 *
1472 * inputs - pointer to Client
1473 * - pointer to channel
1474 * output - NONE
1475 * side effects - Called on a server burst when
1476 * server is CAP_TB|CAP_TBURST capable
1477 */
1478 static void
1479 send_tb(struct Client *client_p, struct Channel *chptr)
1480 {
1481 /*
1482 * We may also send an empty topic here, but only if topic_time isn't 0,
1483 * i.e. if we had a topic that got unset. This is required for syncing
1484 * topics properly.
1485 *
1486 * Imagine the following scenario: Our downlink introduces a channel
1487 * to us with a TS that is equal to ours, but the channel topic on
1488 * their side got unset while the servers were in splitmode, which means
1489 * their 'topic' is newer. They simply wanted to unset it, so we have to
1490 * deal with it in a more sophisticated fashion instead of just resetting
1491 * it to their old topic they had before. Read m_tburst.c:ms_tburst
1492 * for further information -Michael
1493 */
1494 if (chptr->topic_time != 0)
1495 {
1496 if (IsCapable(client_p, CAP_TBURST))
1497 sendto_one(client_p, ":%s TBURST %lu %s %lu %s :%s",
1498 me.name, (unsigned long)chptr->channelts, chptr->chname,
1499 (unsigned long)chptr->topic_time,
1500 chptr->topic_info ? chptr->topic_info : "",
1501 chptr->topic ? chptr->topic : "");
1502 else if (IsCapable(client_p, CAP_TB))
1503 {
1504 if (ConfigChannel.burst_topicwho)
1505 {
1506 sendto_one(client_p, ":%s TB %s %lu %s :%s",
1507 me.name, chptr->chname,
1508 (unsigned long)chptr->topic_time,
1509 chptr->topic_info, chptr->topic ? chptr->topic : "");
1510 }
1511 else
1512 {
1513 sendto_one(client_p, ":%s TB %s %lu :%s",
1514 me.name, chptr->chname,
1515 (unsigned long)chptr->topic_time,
1516 chptr->topic ? chptr->topic : "");
1517 }
1518 }
1519 }
1520 }
1521
1522 /* burst_members()
1523 *
1524 * inputs - pointer to server to send members to
1525 * - dlink_list pointer to membership list to send
1526 * output - NONE
1527 * side effects -
1528 */
1529 static void
1530 burst_members(struct Client *client_p, struct Channel *chptr)
1531 {
1532 struct Client *target_p;
1533 struct Membership *ms;
1534 dlink_node *ptr;
1535
1536 DLINK_FOREACH(ptr, chptr->members.head)
1537 {
1538 ms = ptr->data;
1539 target_p = ms->client_p;
1540
1541 if (!IsBursted(target_p))
1542 {
1543 SetBursted(target_p);
1544
1545 if (target_p->from != client_p)
1546 sendnick_TS(client_p, target_p);
1547 }
1548 }
1549 }
1550
1551 /* New server connection code
1552 * Based upon the stuff floating about in s_bsd.c
1553 * -- adrian
1554 */
1555
1556 /* serv_connect() - initiate a server connection
1557 *
1558 * inputs - pointer to conf
1559 * - pointer to client doing the connect
1560 * output -
1561 * side effects -
1562 *
1563 * This code initiates a connection to a server. It first checks to make
1564 * sure the given server exists. If this is the case, it creates a socket,
1565 * creates a client, saves the socket information in the client, and
1566 * initiates a connection to the server through comm_connect_tcp(). The
1567 * completion of this goes through serv_completed_connection().
1568 *
1569 * We return 1 if the connection is attempted, since we don't know whether
1570 * it suceeded or not, and 0 if it fails in here somewhere.
1571 */
1572 int
1573 serv_connect(struct AccessItem *aconf, struct Client *by)
1574 {
1575 struct ConfItem *conf;
1576 struct Client *client_p;
1577 char buf[HOSTIPLEN];
1578
1579 /* conversion structs */
1580 struct sockaddr_in *v4;
1581 /* Make sure aconf is useful */
1582 assert(aconf != NULL);
1583
1584 if(aconf == NULL)
1585 return (0);
1586
1587 /* XXX should be passing struct ConfItem in the first place */
1588 conf = unmap_conf_item(aconf);
1589
1590 /* log */
1591 irc_getnameinfo((struct sockaddr*)&aconf->ipnum, aconf->ipnum.ss_len,
1592 buf, HOSTIPLEN, NULL, 0, NI_NUMERICHOST);
1593 ilog(L_NOTICE, "Connect to %s[%s] @%s", aconf->user, aconf->host,
1594 buf);
1595
1596 /* Still processing a DNS lookup? -> exit */
1597 if (aconf->dns_pending)
1598 {
1599 sendto_realops_flags(UMODE_ALL, L_ALL,
1600 "Error connecting to %s: DNS lookup for connect{} in progress.",
1601 conf->name);
1602 return (0);
1603 }
1604
1605 if (aconf->dns_failed)
1606 {
1607 sendto_realops_flags(UMODE_ALL, L_ALL,
1608 "Error connecting to %s: DNS lookup for connect{} failed.",
1609 conf->name);
1610 return (0);
1611 }
1612
1613 /* Make sure this server isn't already connected
1614 * Note: aconf should ALWAYS be a valid C: line
1615 */
1616 if ((client_p = find_server(conf->name)) != NULL)
1617 {
1618 sendto_realops_flags(UMODE_ALL, L_ADMIN,
1619 "Server %s already present from %s",
1620 conf->name, get_client_name(client_p, SHOW_IP));
1621 sendto_realops_flags(UMODE_ALL, L_OPER,
1622 "Server %s already present from %s",
1623 conf->name, get_client_name(client_p, MASK_IP));
1624 if (by && IsClient(by) && !MyClient(by))
1625 sendto_one(by, ":%s NOTICE %s :Server %s already present from %s",
1626 me.name, by->name, conf->name,
1627 get_client_name(client_p, MASK_IP));
1628 return (0);
1629 }
1630
1631 /* Create a local client */
1632 client_p = make_client(NULL);
1633
1634 /* Copy in the server, hostname, fd */
1635 strlcpy(client_p->name, conf->name, sizeof(client_p->name));
1636 strlcpy(client_p->host, aconf->host, sizeof(client_p->host));
1637
1638 /* We already converted the ip once, so lets use it - stu */
1639 strlcpy(client_p->sockhost, buf, HOSTIPLEN);
1640
1641 /* create a socket for the server connection */
1642 if (comm_open(&client_p->localClient->fd, aconf->ipnum.ss.ss_family,
1643 SOCK_STREAM, 0, NULL) < 0)
1644 {
1645 /* Eek, failure to create the socket */
1646 report_error(L_ALL,
1647 "opening stream socket to %s: %s", conf->name, errno);
1648 SetDead(client_p);
1649 exit_client(client_p, &me, "Connection failed");
1650 return (0);
1651 }
1652
1653 /* servernames are always guaranteed under HOSTLEN chars */
1654 fd_note(&client_p->localClient->fd, "Server: %s", conf->name);
1655
1656 /* Attach config entries to client here rather than in
1657 * serv_connect_callback(). This to avoid null pointer references.
1658 */
1659 if (!attach_connect_block(client_p, conf->name, aconf->host))
1660 {
1661 sendto_realops_flags(UMODE_ALL, L_ALL,
1662 "Host %s is not enabled for connecting:no C/N-line",
1663 conf->name);
1664 if (by && IsClient(by) && !MyClient(by))
1665 sendto_one(by, ":%s NOTICE %s :Connect to host %s failed.",
1666 me.name, by->name, client_p->name);
1667 SetDead(client_p);
1668 exit_client(client_p, client_p, "Connection failed");
1669 return (0);
1670 }
1671
1672 /* at this point we have a connection in progress and C/N lines
1673 * attached to the client, the socket info should be saved in the
1674 * client and it should either be resolved or have a valid address.
1675 *
1676 * The socket has been connected or connect is in progress.
1677 */
1678 make_server(client_p);
1679
1680 if (by && IsClient(by))
1681 strlcpy(client_p->serv->by, by->name, sizeof(client_p->serv->by));
1682 else
1683 strlcpy(client_p->serv->by, "AutoConn.", sizeof(client_p->serv->by));
1684
1685 SetConnecting(client_p);
1686 dlinkAdd(client_p, &client_p->node, &global_client_list);
1687 /* from def_fam */
1688 client_p->localClient->aftype = aconf->aftype;
1689
1690 /* Now, initiate the connection */
1691 /* XXX assume that a non 0 type means a specific bind address
1692 * for this connect.
1693 */
1694 switch (aconf->aftype)
1695 {
1696 case AF_INET:
1697 v4 = (struct sockaddr_in*)&aconf->my_ipnum;
1698 if (v4->sin_addr.s_addr != 0)
1699 {
1700 struct irc_ssaddr ipn;
1701 memset(&ipn, 0, sizeof(struct irc_ssaddr));
1702 ipn.ss.ss_family = AF_INET;
1703 ipn.ss_port = 0;
1704 memcpy(&ipn, &aconf->my_ipnum, sizeof(struct irc_ssaddr));
1705 comm_connect_tcp(&client_p->localClient->fd, aconf->host, aconf->port,
1706 (struct sockaddr *)&ipn, ipn.ss_len,
1707 serv_connect_callback, client_p, aconf->aftype,
1708 CONNECTTIMEOUT);
1709 }
1710 else if (ServerInfo.specific_ipv4_vhost)
1711 {
1712 struct irc_ssaddr ipn;
1713 memset(&ipn, 0, sizeof(struct irc_ssaddr));
1714 ipn.ss.ss_family = AF_INET;
1715 ipn.ss_port = 0;
1716 memcpy(&ipn, &ServerInfo.ip, sizeof(struct irc_ssaddr));
1717 comm_connect_tcp(&client_p->localClient->fd, aconf->host, aconf->port,
1718 (struct sockaddr *)&ipn, ipn.ss_len,
1719 serv_connect_callback, client_p, aconf->aftype,
1720 CONNECTTIMEOUT);
1721 }
1722 else
1723 comm_connect_tcp(&client_p->localClient->fd, aconf->host, aconf->port,
1724 NULL, 0, serv_connect_callback, client_p, aconf->aftype,
1725 CONNECTTIMEOUT);
1726 break;
1727 #ifdef IPV6
1728 case AF_INET6:
1729 {
1730 struct irc_ssaddr ipn;
1731 struct sockaddr_in6 *v6;
1732 struct sockaddr_in6 *v6conf;
1733
1734 memset(&ipn, 0, sizeof(struct irc_ssaddr));
1735 v6conf = (struct sockaddr_in6 *)&aconf->my_ipnum;
1736 v6 = (struct sockaddr_in6 *)&ipn;
1737
1738 if (memcmp(&v6conf->sin6_addr, &v6->sin6_addr,
1739 sizeof(struct in6_addr)) != 0)
1740 {
1741 memcpy(&ipn, &aconf->my_ipnum, sizeof(struct irc_ssaddr));
1742 ipn.ss.ss_family = AF_INET6;
1743 ipn.ss_port = 0;
1744 comm_connect_tcp(&client_p->localClient->fd,
1745 aconf->host, aconf->port,
1746 (struct sockaddr *)&ipn, ipn.ss_len,
1747 serv_connect_callback, client_p,
1748 aconf->aftype, CONNECTTIMEOUT);
1749 }
1750 else if (ServerInfo.specific_ipv6_vhost)
1751 {
1752 memcpy(&ipn, &ServerInfo.ip6, sizeof(struct irc_ssaddr));
1753 ipn.ss.ss_family = AF_INET6;
1754 ipn.ss_port = 0;
1755 comm_connect_tcp(&client_p->localClient->fd,
1756 aconf->host, aconf->port,
1757 (struct sockaddr *)&ipn, ipn.ss_len,
1758 serv_connect_callback, client_p,
1759 aconf->aftype, CONNECTTIMEOUT);
1760 }
1761 else
1762 comm_connect_tcp(&client_p->localClient->fd,
1763 aconf->host, aconf->port,
1764 NULL, 0, serv_connect_callback, client_p,
1765 aconf->aftype, CONNECTTIMEOUT);
1766 }
1767 #endif
1768 }
1769 return (1);
1770 }
1771
1772 /* serv_connect_callback() - complete a server connection.
1773 *
1774 * This routine is called after the server connection attempt has
1775 * completed. If unsucessful, an error is sent to ops and the client
1776 * is closed. If sucessful, it goes through the initialisation/check
1777 * procedures, the capabilities are sent, and the socket is then
1778 * marked for reading.
1779 */
1780 static void
1781 serv_connect_callback(fde_t *fd, int status, void *data)
1782 {
1783 struct Client *client_p = data;
1784 struct ConfItem *conf=NULL;
1785 struct AccessItem *aconf=NULL;
1786
1787 /* First, make sure its a real client! */
1788 assert(client_p != NULL);
1789 assert(&client_p->localClient->fd == fd);
1790
1791 /* Next, for backward purposes, record the ip of the server */
1792 memcpy(&client_p->localClient->ip, &fd->connect.hostaddr,
1793 sizeof(struct irc_ssaddr));
1794 /* Check the status */
1795 if (status != COMM_OK)
1796 {
1797 /* We have an error, so report it and quit
1798 * Admins get to see any IP, mere opers don't *sigh*
1799 */
1800 if (ConfigServerHide.hide_server_ips)
1801 sendto_realops_flags(UMODE_ALL, L_ADMIN,
1802 "Error connecting to %s: %s",
1803 client_p->name, comm_errstr(status));
1804 else
1805 sendto_realops_flags(UMODE_ALL, L_ADMIN,
1806 "Error connecting to %s[%s]: %s", client_p->name,
1807 client_p->host, comm_errstr(status));
1808
1809 sendto_realops_flags(UMODE_ALL, L_OPER,
1810 "Error connecting to %s: %s",
1811 client_p->name, comm_errstr(status));
1812
1813 /* If a fd goes bad, call dead_link() the socket is no
1814 * longer valid for reading or writing.
1815 */
1816 dead_link_on_write(client_p, 0);
1817 return;
1818 }
1819
1820 /* COMM_OK, so continue the connection procedure */
1821 /* Get the C/N lines */
1822 conf = find_conf_name(&client_p->localClient->confs,
1823 client_p->name, SERVER_TYPE);
1824 if (conf == NULL)
1825 {
1826 sendto_realops_flags(UMODE_ALL, L_ADMIN,
1827 "Lost connect{} block for %s", get_client_name(client_p, HIDE_IP));
1828 sendto_realops_flags(UMODE_ALL, L_OPER,
1829 "Lost connect{} block for %s", get_client_name(client_p, MASK_IP));
1830
1831 exit_client(client_p, &me, "Lost connect{} block");
1832 return;
1833 }
1834
1835 aconf = (struct AccessItem *)map_to_conf(conf);
1836 /* Next, send the initial handshake */
1837 SetHandshake(client_p);
1838
1839 #ifdef HAVE_LIBCRYPTO
1840 /* Handle all CRYPTLINK links in cryptlink_init */
1841 if (IsConfCryptLink(aconf))
1842 {
1843 cryptlink_init(client_p, conf, fd);
1844 return;
1845 }
1846 #endif
1847
1848 /* jdc -- Check and send spasswd, not passwd. */
1849 if (!EmptyString(aconf->spasswd) && (me.id[0] != '\0'))
1850 /* Send TS 6 form only if id */
1851 sendto_one(client_p, "PASS %s TS %d %s",
1852 aconf->spasswd, TS_CURRENT, me.id);
1853 else
1854 sendto_one(client_p, "PASS %s TS 5",
1855 aconf->spasswd);
1856
1857 /* Pass my info to the new server
1858 *
1859 * If this is a HUB, pass on CAP_HUB
1860 * Pass on ZIP if supported
1861 * Pass on TB if supported.
1862 * - Dianora
1863 */
1864 send_capabilities(client_p, aconf, (ServerInfo.hub ? CAP_HUB : 0)
1865 | (IsConfCompressed(aconf) ? CAP_ZIP : 0)
1866 | (IsConfTopicBurst(aconf) ? CAP_TBURST|CAP_TB : 0), 0);
1867
1868 sendto_one(client_p, "SERVER %s 1 :%s%s",
1869 my_name_for_link(conf),
1870 ConfigServerHide.hidden ? "(H) " : "",
1871 me.info);
1872
1873 /* If we've been marked dead because a send failed, just exit
1874 * here now and save everyone the trouble of us ever existing.
1875 */
1876 if (IsDead(client_p))
1877 {
1878 sendto_realops_flags(UMODE_ALL, L_ADMIN,
1879 "%s[%s] went dead during handshake",
1880 client_p->name,
1881 client_p->host);
1882 sendto_realops_flags(UMODE_ALL, L_OPER,
1883 "%s went dead during handshake", client_p->name);
1884 return;
1885 }
1886
1887 /* don't move to serv_list yet -- we haven't sent a burst! */
1888 /* If we get here, we're ok, so lets start reading some data */
1889 comm_setselect(fd, COMM_SELECT_READ, read_packet, client_p, 0);
1890 }
1891
1892 struct Client *
1893 find_servconn_in_progress(const char *name)
1894 {
1895 dlink_node *ptr;
1896 struct Client *cptr;
1897
1898 DLINK_FOREACH(ptr, unknown_list.head)
1899 {
1900 cptr = ptr->data;
1901
1902 if (cptr && cptr->name[0])
1903 if (match(cptr->name, name) || match(name, cptr->name))
1904 return cptr;
1905 }
1906
1907 return NULL;
1908 }
1909
1910 #ifdef HAVE_LIBCRYPTO
1911 /*
1912 * sends a CRYPTLINK SERV command.
1913 */
1914 void
1915 cryptlink_init(struct Client *client_p, struct ConfItem *conf, fde_t *fd)
1916 {
1917 struct AccessItem *aconf;
1918 char *encrypted;
1919 unsigned char *key_to_send;
1920 char randkey[CIPHERKEYLEN];
1921 int enc_len;
1922
1923 /* get key */
1924 if ((!ServerInfo.rsa_private_key) ||
1925 (!RSA_check_key(ServerInfo.rsa_private_key)) )
1926 {
1927 cryptlink_error(client_p, "SERV", "Invalid RSA private key",
1928 "Invalid RSA private key");
1929 return;
1930 }
1931
1932 aconf = (struct AccessItem *)map_to_conf(conf);
1933
1934 if (aconf->rsa_public_key == NULL)
1935 {
1936 cryptlink_error(client_p, "SERV", "Invalid RSA public key",
1937 "Invalid RSA public key");
1938 return;
1939 }
1940
1941 if (get_randomness((unsigned char *)randkey, CIPHERKEYLEN) != 1)
1942 {
1943 cryptlink_error(client_p, "SERV", "Couldn't generate keyphrase",
1944 "Couldn't generate keyphrase");
1945 return;
1946 }
1947
1948 encrypted = MyMalloc(RSA_size(ServerInfo.rsa_private_key));
1949 enc_len = RSA_public_encrypt(CIPHERKEYLEN,
1950 (unsigned char *)randkey,
1951 (unsigned char *)encrypted,
1952 aconf->rsa_public_key,
1953 RSA_PKCS1_PADDING);
1954
1955 memcpy(client_p->localClient->in_key, randkey, CIPHERKEYLEN);
1956
1957 if (enc_len <= 0)
1958 {
1959 report_crypto_errors();
1960 MyFree(encrypted);
1961 cryptlink_error(client_p, "SERV", "Couldn't encrypt data",
1962 "Couldn't encrypt data");
1963 return;
1964 }
1965
1966 if (!(base64_block(&key_to_send, encrypted, enc_len)))
1967 {
1968 MyFree(encrypted);
1969 cryptlink_error(client_p, "SERV", "Couldn't base64 encode key",
1970 "Couldn't base64 encode key");
1971 return;
1972 }
1973
1974 send_capabilities(client_p, aconf, (ServerInfo.hub ? CAP_HUB : 0)
1975 | (IsConfCompressed(aconf) ? CAP_ZIP : 0)
1976 | (IsConfTopicBurst(aconf) ? CAP_TBURST|CAP_TB : 0), CAP_ENC_MASK);
1977
1978 if (me.id[0])
1979 sendto_one(client_p, "PASS . TS %d %s", TS_CURRENT, me.id);
1980
1981 sendto_one(client_p, "CRYPTLINK SERV %s %s :%s%s",
1982 my_name_for_link(conf), key_to_send,
1983 ConfigServerHide.hidden ? "(H) " : "", me.info);
1984
1985 SetHandshake(client_p);
1986 SetWaitAuth(client_p);
1987
1988 MyFree(encrypted);
1989 MyFree(key_to_send);
1990
1991 if (IsDead(client_p))
1992 cryptlink_error(client_p, "SERV", "Went dead during handshake",
1993 "Went dead during handshake");
1994 else if (fd != NULL)
1995 /* If we get here, we're ok, so lets start reading some data */
1996 comm_setselect(fd, COMM_SELECT_READ, read_packet, client_p, 0);
1997 }
1998
1999 void
2000 cryptlink_error(struct Client *client_p, const char *type,
2001 const char *reason, const char *client_reason)
2002 {
2003 sendto_realops_flags(UMODE_ALL, L_ADMIN, "%s: CRYPTLINK %s error - %s",
2004 get_client_name(client_p, SHOW_IP), type, reason);
2005 sendto_realops_flags(UMODE_ALL, L_OPER, "%s: CRYPTLINK %s error - %s",
2006 get_client_name(client_p, MASK_IP), type, reason);
2007 ilog(L_ERROR, "%s: CRYPTLINK %s error - %s",
2008 get_client_name(client_p, SHOW_IP), type, reason);
2009
2010 /* If client_reason isn't NULL, then exit the client with the message
2011 * defined in the call.
2012 */
2013 if ((client_reason != NULL) && (!IsDead(client_p)))
2014 exit_client(client_p, &me, client_reason);
2015 }
2016
2017 static char base64_chars[] =
2018 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
2019
2020 static char base64_values[] =
2021 {
2022 /* 00-15 */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
2023 /* 16-31 */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
2024 /* 32-47 */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63,
2025 /* 48-63 */ 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, 0, -1, -1,
2026 /* 64-79 */ -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
2027 /* 80-95 */ 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1,
2028 /* 96-111 */ -1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
2029 /* 112-127 */ 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1,
2030 /* 128-143 */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
2031 /* 144-159 */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
2032 /* 160-175 */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
2033 /* 186-191 */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
2034 /* 192-207 */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
2035 /* 208-223 */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
2036 /* 224-239 */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
2037 /* 240-255 */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1
2038 };
2039
2040 /*
2041 * base64_block will allocate and return a new block of memory
2042 * using MyMalloc(). It should be freed after use.
2043 */
2044 int
2045 base64_block(unsigned char **output, char *data, int len)
2046 {
2047 unsigned char *out;
2048 unsigned char *in = (unsigned char*)data;
2049 unsigned long int q_in;
2050 int i;
2051 int count = 0;
2052
2053 out = MyMalloc(((((len + 2) - ((len + 2) % 3)) / 3) * 4) + 1);
2054
2055 /* process 24 bits at a time */
2056 for( i = 0; i < len; i += 3)
2057 {
2058 q_in = 0;
2059
2060 if ( i + 2 < len )
2061 {
2062 q_in = (in[i+2] & 0xc0) << 2;
2063 q_in |= in[i+2];
2064 }
2065
2066 if ( i + 1 < len )
2067 {
2068 q_in |= (in[i+1] & 0x0f) << 10;
2069 q_in |= (in[i+1] & 0xf0) << 12;
2070 }
2071
2072 q_in |= (in[i] & 0x03) << 20;
2073 q_in |= in[i] << 22;
2074
2075 q_in &= 0x3f3f3f3f;
2076
2077 out[count++] = base64_chars[((q_in >> 24) )];
2078 out[count++] = base64_chars[((q_in >> 16) & 0xff)];
2079 out[count++] = base64_chars[((q_in >> 8) & 0xff)];
2080 out[count++] = base64_chars[((q_in ) & 0xff)];
2081 }
2082 if ( (i - len) > 0 )
2083 {
2084 out[count-1] = '=';
2085 if ( (i - len) > 1 )
2086 out[count-2] = '=';
2087 }
2088
2089 out[count] = '\0';
2090 *output = out;
2091 return (count);
2092 }
2093
2094 /*
2095 * unbase64_block will allocate and return a new block of memory
2096 * using MyMalloc(). It should be freed after use.
2097 */
2098 int
2099 unbase64_block(unsigned char **output, char *data, int len)
2100 {
2101 unsigned char *out;
2102 unsigned char *in = (unsigned char*)data;
2103 unsigned long int q_in;
2104 int i;
2105 int count = 0;
2106
2107 if ((len % 4) != 0)
2108 return (0);
2109
2110 out = MyMalloc(((len / 4) * 3) + 1);
2111
2112 /* process 32 bits at a time */
2113 for( i = 0; (i + 3) < len; i+=4)
2114 {
2115 /* compress input (chars a, b, c and d) as follows:
2116 * (after converting ascii -> base64 value)
2117 *
2118 * |00000000aaaaaabbbbbbccccccdddddd|
2119 * | 765432 107654 321076 543210|
2120 */
2121
2122 q_in = 0;
2123
2124 if (base64_values[in[i+3]] > -1)
2125 q_in |= base64_values[in[i+3]] ;
2126 if (base64_values[in[i+2]] > -1)
2127 q_in |= base64_values[in[i+2]] << 6;
2128 if (base64_values[in[i+1]] > -1)
2129 q_in |= base64_values[in[i+1]] << 12;
2130 if (base64_values[in[i ]] > -1)
2131 q_in |= base64_values[in[i ]] << 18;
2132
2133 out[count++] = (q_in >> 16) & 0xff;
2134 out[count++] = (q_in >> 8) & 0xff;
2135 out[count++] = (q_in ) & 0xff;
2136 }
2137
2138 if (in[i-1] == '=') count--;
2139 if (in[i-2] == '=') count--;
2140
2141 out[count] = '\0';
2142 *output = out;
2143 return (count);
2144 }
2145
2146 #endif /* HAVE_LIBCRYPTO */
2147

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