ViewVC Help
View File | Revision Log | Show Annotations | View Changeset | Root Listing
root/svn/ircd-hybrid-8/src/s_serv.c
Revision: 1203
Committed: Tue Aug 23 20:06:08 2011 UTC (12 years, 7 months ago) by michael
Content type: text/x-csrc
File size: 62526 byte(s)
Log Message:
- make channel::topic and channel::topic_info fixed-size arrays

File Contents

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

Properties

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