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root/svn/ircd-hybrid-8/src/s_serv.c
Revision: 1119
Committed: Fri Jan 7 22:01:47 2011 UTC (13 years, 2 months ago) by michael
Content type: text/x-csrc
Original Path: ircd-hybrid-7.3/src/s_serv.c
File size: 61528 byte(s)
Log Message:
- removed HUB capability, which was a LL leftover

File Contents

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

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svn:keywords Id Revision