/[svn]/ircd-hybrid-8/src/s_serv.c
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Annotation of /ircd-hybrid-8/src/s_serv.c

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Revision 1247 - (hide annotations)
Sat Oct 1 07:54:24 2011 UTC (8 years, 1 month ago) by michael
File MIME type: text/x-chdr
File size: 62650 byte(s)
- Rewrite and cleanup half-broken logging subsystem.
  Logfile rotating is not working yet

1 adx 30 /*
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 knight 31 * $Id$
23 adx 30 */
24    
25     #include "stdinc.h"
26     #ifdef HAVE_LIBCRYPTO
27     #include <openssl/rsa.h>
28     #include "rsa.h"
29     #endif
30 michael 1011 #include "list.h"
31 adx 30 #include "channel.h"
32     #include "channel_mode.h"
33     #include "client.h"
34     #include "dbuf.h"
35     #include "event.h"
36     #include "fdlist.h"
37     #include "hash.h"
38     #include "irc_string.h"
39     #include "sprintf_irc.h"
40     #include "ircd.h"
41     #include "ircd_defs.h"
42     #include "s_bsd.h"
43     #include "numeric.h"
44     #include "packet.h"
45     #include "irc_res.h"
46     #include "s_conf.h"
47     #include "s_serv.h"
48     #include "s_log.h"
49     #include "s_user.h"
50     #include "send.h"
51     #include "memory.h"
52     #include "channel.h" /* chcap_usage_counts stuff...*/
53 michael 1243 #include "parse.h"
54 adx 30
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 michael 948 uint64_t in = 0, in_wire = 0, out = 0, out_wire = 0;
128 adx 30 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 michael 948 memcpy(&server_p->localClient->zipstats, &zipstats, sizeof(struct ZipStats));
188 adx 30 }
189    
190     void
191     collect_zipstats(void *unused)
192     {
193 michael 948 dlink_node *ptr = NULL;
194 adx 30
195     DLINK_FOREACH(ptr, serv_list.head)
196     {
197 michael 948 struct Client *target_p = ptr->data;
198 adx 30
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 michael 319 struct EncCapability *epref = NULL;
219 adx 30
220     /* Use connect{} specific info if available */
221     if (aconf->cipher_preference)
222     epref = aconf->cipher_preference;
223 michael 319 else if (ConfigFileEntry.default_cipher_preference)
224 adx 30 epref = ConfigFileEntry.default_cipher_preference;
225    
226 michael 319 /*
227     * If the server supports the capability in hand, return the matching
228 adx 30 * conf struct. Otherwise, return NULL (an error).
229     */
230 michael 319 if (epref && IsCapableEnc(client_p, epref->cap))
231     return epref;
232 adx 30
233 michael 319 return NULL;
234 adx 30 }
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 michael 1169 target_p = hash_find_client(parv[server]);
371 adx 30 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 michael 1169 if (target_p == NULL && (target_p = hash_find_server(parv[server])))
379 adx 30 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 michael 1169 if (!(target_p = hash_find_server(parv[server])))
393 adx 30 {
394     sendto_one(source_p, form_str(ERR_NOSUCHSERVER),
395 michael 1234 me.name, source_p->name, parv[server]);
396 adx 30 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 michael 1234 me.name, source_p->name, parv[server]);
424 adx 30 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 michael 1234 me.name, source_p->name, parv[server]);
447 adx 30 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 michael 1013 aconf = map_to_conf(conf);
477 adx 30
478     /* Also when already connecting! (update holdtimes) --SRB
479     */
480 michael 1013 if (!(aconf->status & CONF_SERVER) || !aconf->port ||
481 adx 30 !(IsConfAllowAutoConn(aconf)))
482     continue;
483    
484 michael 1013 cltmp = map_to_conf(aconf->class_ptr);
485 adx 30
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 michael 1169 if (hash_find_server(conf->name) != NULL)
510 adx 30 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 michael 1115 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 michael 1118 return 0;
557 michael 1115
558     ++length;
559    
560     if (*p == '.')
561     ++dots;
562     }
563    
564 michael 1118 return dots != 0 && length <= HOSTLEN;
565 michael 1115 }
566    
567     int
568 adx 30 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 michael 1013 aconf = map_to_conf(conf);
590 adx 30
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 michael 885 server_aconf = map_to_conf(server_conf);
660 adx 30
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 michael 329 {
669 adx 30 ClearCap(client_p, CAP_TB);
670 michael 329 ClearCap(client_p, CAP_TBURST);
671     }
672 adx 30
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 michael 885 struct Capability *cap = MyMalloc(sizeof(*cap));
714 adx 30
715     DupString(cap->name, capab_name);
716     cap->cap = cap_flag;
717     dlinkAdd(cap, &cap->node, &cap_list);
718 michael 885
719 adx 30 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 michael 896 return 0;
754 adx 30 }
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 michael 896 const dlink_node *ptr = NULL;
767 adx 30
768     DLINK_FOREACH(ptr, cap_list.head)
769     {
770 michael 896 const struct Capability *cap = ptr->data;
771 adx 30
772 michael 896 if (cap->cap && !irccmp(cap->name, capab))
773     return cap->cap;
774 adx 30 }
775 michael 896
776     return 0;
777 adx 30 }
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 michael 319 const struct EncCapability *epref = NULL;
800 adx 30 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 michael 319 else if (ConfigFileEntry.default_cipher_preference)
827 adx 30 epref = ConfigFileEntry.default_cipher_preference;
828    
829 michael 319 if (epref && (epref->cap & enc_can_send))
830 adx 30 {
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 michael 319 *(t - 1) = '\0';
842 adx 30 sendto_one(client_p, "CAPAB :%s", msgbuf);
843     }
844    
845     /* sendnick_TS()
846     *
847     * inputs - client (server) to send nick towards
848 adx 386 * - client to send nick for
849 adx 30 * 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 michael 1219 send_umode(NULL, target_p, 0, HasOFlag(target_p, OPER_FLAG_HIDDEN_ADMIN) ?
861 adx 30 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 michael 1196 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 adx 30 else
890 michael 1196 {
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 adx 386
907 adx 30 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 michael 896 ++ServerStats.is_ref;
1013 adx 30 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 michael 1115 aconf = map_to_conf(conf);
1020 adx 30
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 michael 1115 sendto_one(client_p, "PASS %s TS %d %s",
1028     aconf->spasswd, TS_CURRENT, me.id);
1029 adx 30
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 michael 1119 send_capabilities(client_p, aconf,
1038     (IsConfCompressed(aconf) ? CAP_ZIP : 0)
1039 michael 329 | (IsConfTopicBurst(aconf) ? CAP_TBURST|CAP_TB : 0), 0);
1040 adx 30
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 michael 1118 me.name, ConfigServerHide.hidden ? "(H) " : "", me.info);
1053 adx 30 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 michael 1115 sendto_one(client_p, "SVINFO %d %d 0 :%lu", TS_CURRENT, TS_MIN,
1077 adx 30 (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 michael 889 dlinkAdd(client_p, &client_p->lnode, &me.serv->server_list);
1109 adx 30
1110 michael 1126 assert(dlinkFind(&unknown_list, client_p));
1111 adx 30
1112 michael 1126 dlink_move_node(&client_p->localClient->lclient_node,
1113     &unknown_list, &serv_list);
1114 adx 30
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 michael 1241 client_p->localClient->firsttime = CurrentTime;
1125 adx 30
1126 michael 1157
1127     if (find_matching_name_conf(SERVICE_TYPE, client_p->name, NULL, NULL, 0))
1128 michael 1219 AddFlag(client_p, FLAGS_SERVICE);
1129 michael 1157
1130 adx 30 /* 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 michael 1247 ilog(LOG_TYPE_IRCD, "Link with %s established: (%s) link",
1139 adx 30 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 michael 1118 if (IsMe(target_p) || target_p->from == client_p)
1201 adx 30 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 michael 329
1299 adx 30 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 michael 329
1312 adx 30 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 michael 885 burst_all(client_p);
1419 adx 30
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 michael 329 dlink_node *ptr = NULL;
1435 adx 30
1436 michael 329 DLINK_FOREACH(ptr, global_channel_list.head)
1437 adx 30 {
1438 michael 329 struct Channel *chptr = ptr->data;
1439 adx 30
1440     if (dlink_list_length(&chptr->members) != 0)
1441     {
1442     burst_members(client_p, chptr);
1443     send_channel_modes(client_p, chptr);
1444 michael 329
1445     if (IsCapable(client_p, CAP_TBURST) ||
1446     IsCapable(client_p, CAP_TB))
1447 adx 30 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 michael 329 struct Client *target_p = ptr->data;
1456 adx 30
1457 michael 1219 if (!HasFlag(target_p, FLAGS_BURSTED) && target_p->from != client_p)
1458 adx 30 sendnick_TS(client_p, target_p);
1459    
1460 michael 1219 DelFlag(target_p, FLAGS_BURSTED);
1461 adx 30 }
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 michael 329 * 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 adx 30 */
1480     static void
1481     send_tb(struct Client *client_p, struct Channel *chptr)
1482     {
1483 michael 329 /*
1484 michael 337 * 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 michael 329 */
1496 michael 337 if (chptr->topic_time != 0)
1497 adx 30 {
1498 michael 329 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 michael 337 (unsigned long)chptr->topic_time,
1502 michael 1203 chptr->topic_info,
1503     chptr->topic);
1504 michael 329 else if (IsCapable(client_p, CAP_TB))
1505 adx 30 {
1506 michael 329 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 michael 1203 chptr->topic_info, chptr->topic);
1512 michael 329 }
1513     else
1514     {
1515     sendto_one(client_p, ":%s TB %s %lu :%s",
1516     me.name, chptr->chname,
1517 michael 337 (unsigned long)chptr->topic_time,
1518 michael 1203 chptr->topic);
1519 michael 329 }
1520 adx 30 }
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 michael 1219 if (!HasFlag(target_p, FLAGS_BURSTED))
1544 adx 30 {
1545 michael 1219 AddFlag(target_p, FLAGS_BURSTED);
1546 adx 30
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 michael 1123 getnameinfo((struct sockaddr *)&aconf->ipnum, aconf->ipnum.ss_len,
1594     buf, sizeof(buf), NULL, 0, NI_NUMERICHOST);
1595 michael 1247 ilog(LOG_TYPE_IRCD, "Connect to %s[%s] @%s", aconf->user, aconf->host,
1596 adx 30 buf);
1597    
1598     /* Still processing a DNS lookup? -> exit */
1599 michael 992 if (aconf->dns_pending)
1600 adx 30 {
1601 michael 992 sendto_realops_flags(UMODE_ALL, L_ALL,
1602     "Error connecting to %s: DNS lookup for connect{} in progress.",
1603     conf->name);
1604 adx 30 return (0);
1605     }
1606    
1607 michael 992 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 adx 30 /* Make sure this server isn't already connected
1616     * Note: aconf should ALWAYS be a valid C: line
1617     */
1618 michael 1169 if ((client_p = hash_find_server(conf->name)) != NULL)
1619 adx 30 {
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 michael 1115 strlcpy(client_p->sockhost, buf, sizeof(client_p->sockhost));
1642 adx 30
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 michael 1115 if (!EmptyString(aconf->spasswd))
1852 adx 30 /* 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 michael 1119 send_capabilities(client_p, aconf,
1863     (IsConfCompressed(aconf) ? CAP_ZIP : 0)
1864 michael 329 | (IsConfTopicBurst(aconf) ? CAP_TBURST|CAP_TB : 0), 0);
1865 adx 30
1866     sendto_one(client_p, "SERVER %s 1 :%s%s",
1867 michael 1118 me.name, ConfigServerHide.hidden ? "(H) " : "",
1868 adx 30 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 michael 1118 if (match(name, cptr->name))
1901 adx 30 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 michael 1119 send_capabilities(client_p, aconf,
1972     (IsConfCompressed(aconf) ? CAP_ZIP : 0)
1973 michael 329 | (IsConfTopicBurst(aconf) ? CAP_TBURST|CAP_TB : 0), CAP_ENC_MASK);
1974 adx 30
1975 michael 1115 sendto_one(client_p, "PASS . TS %d %s", TS_CURRENT, me.id);
1976 adx 30 sendto_one(client_p, "CRYPTLINK SERV %s %s :%s%s",
1977 michael 1118 me.name, key_to_send,
1978 adx 30 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 michael 1247 ilog(LOG_TYPE_IRCD, "%s: CRYPTLINK %s error - %s",
2003 adx 30 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    

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