ViewVC Help
View File | Revision Log | Show Annotations | View Changeset | Root Listing
root/svn/ircd-hybrid-8/src/s_serv.c
Revision: 1156
Committed: Tue Aug 9 20:29:20 2011 UTC (12 years, 7 months ago) by michael
Content type: text/x-csrc
File size: 61483 byte(s)
Log Message:
- create ircd-hybrid-8 "branch"

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 "sprintf_irc.h"
41     #include "ircd.h"
42     #include "ircd_defs.h"
43     #include "s_bsd.h"
44     #include "numeric.h"
45     #include "packet.h"
46     #include "irc_res.h"
47     #include "s_conf.h"
48     #include "s_serv.h"
49     #include "s_log.h"
50     #include "s_user.h"
51     #include "send.h"
52     #include "memory.h"
53     #include "channel.h" /* chcap_usage_counts stuff...*/
54    
55     #define MIN_CONN_FREQ 300
56    
57     static dlink_list cap_list = { NULL, NULL, 0 };
58     static void server_burst(struct Client *);
59     static int fork_server(struct Client *);
60     static void burst_all(struct Client *);
61     static void send_tb(struct Client *client_p, struct Channel *chptr);
62    
63     static CNCB serv_connect_callback;
64    
65     static void start_io(struct Client *);
66     static void burst_members(struct Client *, struct Channel *);
67    
68     static SlinkRplHnd slink_error;
69     static SlinkRplHnd slink_zipstats;
70    
71    
72     #ifdef HAVE_LIBCRYPTO
73     struct EncCapability CipherTable[] =
74     {
75     #ifdef HAVE_EVP_BF_CFB
76     { "BF/168", CAP_ENC_BF_168, 24, CIPHER_BF },
77     { "BF/128", CAP_ENC_BF_128, 16, CIPHER_BF },
78     #endif
79     #ifdef HAVE_EVP_CAST5_CFB
80     { "CAST/128", CAP_ENC_CAST_128, 16, CIPHER_CAST },
81     #endif
82     #ifdef HAVE_EVP_IDEA_CFB
83     { "IDEA/128", CAP_ENC_IDEA_128, 16, CIPHER_IDEA },
84     #endif
85     #ifdef HAVE_EVP_RC5_32_12_16_CFB
86     { "RC5.16/128", CAP_ENC_RC5_16_128, 16, CIPHER_RC5_16 },
87     { "RC5.12/128", CAP_ENC_RC5_12_128, 16, CIPHER_RC5_12 },
88     { "RC5.8/128", CAP_ENC_RC5_8_128, 16, CIPHER_RC5_8 },
89     #endif
90     #ifdef HAVE_EVP_DES_EDE3_CFB
91     { "3DES/168", CAP_ENC_3DES_168, 24, CIPHER_3DES },
92     #endif
93     #ifdef HAVE_EVP_DES_CFB
94     { "DES/56", CAP_ENC_DES_56, 8, CIPHER_DES },
95     #endif
96     { 0, 0, 0, 0 }
97     };
98     #endif
99    
100     struct SlinkRplDef slinkrpltab[] = {
101     { SLINKRPL_ERROR, slink_error, SLINKRPL_FLAG_DATA },
102     { SLINKRPL_ZIPSTATS, slink_zipstats, SLINKRPL_FLAG_DATA },
103     { 0, 0, 0 },
104     };
105    
106    
107     void
108     slink_error(unsigned int rpl, unsigned int len, unsigned char *data,
109     struct Client *server_p)
110     {
111     assert(rpl == SLINKRPL_ERROR);
112     assert(len < 256);
113    
114     data[len-1] = '\0';
115    
116     sendto_realops_flags(UMODE_ALL, L_ALL, "SlinkError for %s: %s",
117     server_p->name, data);
118     /* XXX should this be exit_client? */
119     exit_client(server_p, &me, "servlink error -- terminating link");
120     }
121    
122     void
123     slink_zipstats(unsigned int rpl, unsigned int len, unsigned char *data,
124     struct Client *server_p)
125     {
126     struct ZipStats zipstats;
127 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     target_p = find_client(parv[server]);
371     else
372     target_p = find_person(client_p, parv[server]);
373    
374     if (target_p)
375     if (target_p->from == source_p->from && !MyConnect(target_p))
376     target_p = NULL;
377    
378     if (target_p == NULL && (target_p = find_server(parv[server])))
379     if (target_p->from == source_p->from && !MyConnect(target_p))
380     target_p = NULL;
381    
382     collapse(parv[server]);
383     wilds = (strchr(parv[server], '?') || strchr(parv[server], '*'));
384    
385     /* Again, if there are no wild cards involved in the server
386     * name, use the hash lookup
387     */
388     if (target_p == NULL)
389     {
390     if (!wilds)
391     {
392     if (!(target_p = find_server(parv[server])))
393     {
394     sendto_one(source_p, form_str(ERR_NOSUCHSERVER),
395     me.name, parv[0], parv[server]);
396     return(HUNTED_NOSUCH);
397     }
398     }
399     else
400     {
401     DLINK_FOREACH(ptr, global_client_list.head)
402     {
403     target_tmp = ptr->data;
404    
405     if (match(parv[server], target_tmp->name))
406     {
407     if (target_tmp->from == source_p->from && !MyConnect(target_tmp))
408     continue;
409     target_p = ptr->data;
410    
411     if (IsRegistered(target_p) && (target_p != client_p))
412     break;
413     }
414     }
415     }
416     }
417    
418     if (target_p != NULL)
419     {
420     if(!IsRegistered(target_p))
421     {
422     sendto_one(source_p, form_str(ERR_NOSUCHSERVER),
423     me.name, parv[0], parv[server]);
424     return HUNTED_NOSUCH;
425     }
426    
427     if (IsMe(target_p) || MyClient(target_p))
428     return HUNTED_ISME;
429    
430     if (!match(target_p->name, parv[server]))
431     parv[server] = target_p->name;
432    
433     /* This is a little kludgy but should work... */
434     if (IsClient(source_p) &&
435     ((MyConnect(target_p) && IsCapable(target_p, CAP_TS6)) ||
436     (!MyConnect(target_p) && IsCapable(target_p->from, CAP_TS6))))
437     parv[0] = ID(source_p);
438    
439     sendto_one(target_p, command, parv[0],
440     parv[1], parv[2], parv[3], parv[4],
441     parv[5], parv[6], parv[7], parv[8]);
442     return(HUNTED_PASS);
443     }
444    
445     sendto_one(source_p, form_str(ERR_NOSUCHSERVER),
446     me.name, parv[0], parv[server]);
447     return(HUNTED_NOSUCH);
448     }
449    
450     /* try_connections()
451     *
452     * inputs - void pointer which is not used
453     * output - NONE
454     * side effects -
455     * scan through configuration and try new connections.
456     * Returns the calendar time when the next call to this
457     * function should be made latest. (No harm done if this
458     * is called earlier or later...)
459     */
460     void
461     try_connections(void *unused)
462     {
463     dlink_node *ptr;
464     struct ConfItem *conf;
465     struct AccessItem *aconf;
466     struct ClassItem *cltmp;
467     int confrq;
468    
469     /* TODO: change this to set active flag to 0 when added to event! --Habeeb */
470     if (GlobalSetOptions.autoconn == 0)
471     return;
472    
473     DLINK_FOREACH(ptr, server_items.head)
474     {
475     conf = ptr->data;
476 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     if (find_server(conf->name) != NULL)
510     continue;
511    
512     if (CurrUserCount(cltmp) < MaxTotal(cltmp))
513     {
514     /* Go to the end of the list, if not already last */
515     if (ptr->next != NULL)
516     {
517     dlinkDelete(ptr, &server_items);
518     dlinkAddTail(conf, &conf->node, &server_items);
519     }
520    
521     if (find_servconn_in_progress(conf->name))
522     return;
523    
524     /* We used to only print this if serv_connect() actually
525     * succeeded, but since comm_tcp_connect() can call the callback
526     * immediately if there is an error, we were getting error messages
527     * in the wrong order. SO, we just print out the activated line,
528     * and let serv_connect() / serv_connect_callback() print an
529     * error afterwards if it fails.
530     * -- adrian
531     */
532     if (ConfigServerHide.hide_server_ips)
533     sendto_realops_flags(UMODE_ALL, L_ALL, "Connection to %s activated.",
534     conf->name);
535     else
536     sendto_realops_flags(UMODE_ALL, L_ALL, "Connection to %s[%s] activated.",
537     conf->name, aconf->host);
538    
539     serv_connect(aconf, NULL);
540     /* We connect only one at time... */
541     return;
542     }
543     }
544     }
545    
546     int
547 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     send_umode(NULL, target_p, 0, IsOperHiddenAdmin(target_p) ?
861     SEND_UMODES & ~UMODE_ADMIN : SEND_UMODES, ubuf);
862    
863     if (ubuf[0] == '\0')
864     {
865     ubuf[0] = '+';
866     ubuf[1] = '\0';
867     }
868    
869     /* XXX Both of these need to have a :me.name or :mySID!?!?! */
870     if (HasID(target_p) && IsCapable(client_p, CAP_TS6))
871     sendto_one(client_p, ":%s UID %s %d %lu %s %s %s %s %s :%s",
872     target_p->servptr->id,
873 adx 386 target_p->name, target_p->hopcount + 1,
874     (unsigned long) target_p->tsinfo,
875     ubuf, target_p->username, target_p->host,
876     (MyClient(target_p) && IsIPSpoof(target_p)) ?
877 michael 391 "0" : target_p->sockhost, target_p->id, target_p->info);
878 adx 30 else
879     sendto_one(client_p, "NICK %s %d %lu %s %s %s %s :%s",
880     target_p->name, target_p->hopcount + 1,
881     (unsigned long) target_p->tsinfo,
882     ubuf, target_p->username, target_p->host,
883     target_p->servptr->name, target_p->info);
884 adx 386
885 adx 30 if (IsConfAwayBurst((struct AccessItem *)map_to_conf(client_p->serv->sconf)))
886     if (!EmptyString(target_p->away))
887     sendto_one(client_p, ":%s AWAY :%s", target_p->name,
888     target_p->away);
889    
890     }
891    
892     /*
893     * show_capabilities - show current server capabilities
894     *
895     * inputs - pointer to a struct Client
896     * output - pointer to static string
897     * side effects - build up string representing capabilities of server listed
898     */
899     const char *
900     show_capabilities(struct Client *target_p)
901     {
902     static char msgbuf[IRCD_BUFSIZE];
903     char *t = msgbuf;
904     dlink_node *ptr;
905    
906     t += ircsprintf(msgbuf, "TS ");
907    
908     DLINK_FOREACH(ptr, cap_list.head)
909     {
910     const struct Capability *cap = ptr->data;
911    
912     if (IsCapable(target_p, cap->cap))
913     t += ircsprintf(t, "%s ", cap->name);
914     }
915     #ifdef HAVE_LIBCRYPTO
916     if (IsCapable(target_p, CAP_ENC) &&
917     target_p->localClient->in_cipher &&
918     target_p->localClient->out_cipher)
919     t += ircsprintf(t, "ENC:%s ",
920     target_p->localClient->in_cipher->name);
921     #endif
922     *(t - 1) = '\0';
923    
924     return(msgbuf);
925     }
926    
927     /* make_server()
928     *
929     * inputs - pointer to client struct
930     * output - pointer to struct Server
931     * side effects - add's an Server information block to a client
932     * if it was not previously allocated.
933     */
934     struct Server *
935     make_server(struct Client *client_p)
936     {
937     if (client_p->serv == NULL)
938     client_p->serv = MyMalloc(sizeof(struct Server));
939    
940     return client_p->serv;
941     }
942    
943     /* server_estab()
944     *
945     * inputs - pointer to a struct Client
946     * output -
947     * side effects -
948     */
949     void
950     server_estab(struct Client *client_p)
951     {
952     struct Client *target_p;
953     struct ConfItem *conf;
954     struct AccessItem *aconf=NULL;
955     char *host;
956     const char *inpath;
957     static char inpath_ip[HOSTLEN * 2 + USERLEN + 6];
958     dlink_node *ptr;
959    
960     assert(client_p != NULL);
961    
962     strlcpy(inpath_ip, get_client_name(client_p, SHOW_IP), sizeof(inpath_ip));
963    
964     inpath = get_client_name(client_p, MASK_IP); /* "refresh" inpath with host */
965     host = client_p->name;
966    
967     if ((conf = find_conf_name(&client_p->localClient->confs, host, SERVER_TYPE))
968     == NULL)
969     {
970     /* This shouldn't happen, better tell the ops... -A1kmm */
971     sendto_realops_flags(UMODE_ALL, L_ALL, "Warning: Lost connect{} block "
972     "for server %s(this shouldn't happen)!", host);
973     exit_client(client_p, &me, "Lost connect{} block!");
974     return;
975     }
976    
977     MyFree(client_p->localClient->passwd);
978     client_p->localClient->passwd = NULL;
979    
980     /* Its got identd, since its a server */
981     SetGotId(client_p);
982    
983     /* If there is something in the serv_list, it might be this
984     * connecting server..
985     */
986     if (!ServerInfo.hub && serv_list.head)
987     {
988     if (client_p != serv_list.head->data || serv_list.head->next)
989     {
990 michael 896 ++ServerStats.is_ref;
991 adx 30 sendto_one(client_p, "ERROR :I'm a leaf not a hub");
992     exit_client(client_p, &me, "I'm a leaf");
993     return;
994     }
995     }
996    
997 michael 1115 aconf = map_to_conf(conf);
998 adx 30
999     if (IsUnknown(client_p) && !IsConfCryptLink(aconf))
1000     {
1001     /* jdc -- 1. Use EmptyString(), not [0] index reference.
1002     * 2. Check aconf->spasswd, not aconf->passwd.
1003     */
1004     if (!EmptyString(aconf->spasswd))
1005 michael 1115 sendto_one(client_p, "PASS %s TS %d %s",
1006     aconf->spasswd, TS_CURRENT, me.id);
1007 adx 30
1008     /* Pass my info to the new server
1009     *
1010     * Pass on ZIP if supported
1011     * Pass on TB if supported.
1012     * - Dianora
1013     */
1014    
1015 michael 1119 send_capabilities(client_p, aconf,
1016     (IsConfCompressed(aconf) ? CAP_ZIP : 0)
1017 michael 329 | (IsConfTopicBurst(aconf) ? CAP_TBURST|CAP_TB : 0), 0);
1018 adx 30
1019     /* SERVER is the last command sent before switching to ziplinks.
1020     * We set TCPNODELAY on the socket to make sure it gets sent out
1021     * on the wire immediately. Otherwise, it could be sitting in
1022     * a kernel buffer when we start sending zipped data, and the
1023     * parser on the receiving side can't hand both unzipped and zipped
1024     * data in one packet. --Rodder
1025     *
1026     * currently we only need to call send_queued_write,
1027     * Nagle is already disabled at this point --adx
1028     */
1029     sendto_one(client_p, "SERVER %s 1 :%s%s",
1030 michael 1118 me.name, ConfigServerHide.hidden ? "(H) " : "", me.info);
1031 adx 30 send_queued_write(client_p);
1032     }
1033    
1034     /* Hand the server off to servlink now */
1035     if (IsCapable(client_p, CAP_ENC) || IsCapable(client_p, CAP_ZIP))
1036     {
1037     if (fork_server(client_p) < 0)
1038     {
1039     sendto_realops_flags(UMODE_ALL, L_ADMIN,
1040     "Warning: fork failed for server %s -- check servlink_path (%s)",
1041     get_client_name(client_p, HIDE_IP), ConfigFileEntry.servlink_path);
1042     sendto_realops_flags(UMODE_ALL, L_OPER, "Warning: fork failed for server "
1043     "%s -- check servlink_path (%s)",
1044     get_client_name(client_p, MASK_IP),
1045     ConfigFileEntry.servlink_path);
1046     exit_client(client_p, &me, "fork failed");
1047     return;
1048     }
1049    
1050     start_io(client_p);
1051     SetServlink(client_p);
1052     }
1053    
1054 michael 1115 sendto_one(client_p, "SVINFO %d %d 0 :%lu", TS_CURRENT, TS_MIN,
1055 adx 30 (unsigned long)CurrentTime);
1056    
1057     /* assumption here is if they passed the correct TS version, they also passed an SID */
1058     if (IsCapable(client_p, CAP_TS6))
1059     hash_add_id(client_p);
1060    
1061     /* XXX Does this ever happen? I don't think so -db */
1062     detach_conf(client_p, OPER_TYPE);
1063    
1064     /* *WARNING*
1065     ** In the following code in place of plain server's
1066     ** name we send what is returned by get_client_name
1067     ** which may add the "sockhost" after the name. It's
1068     ** *very* *important* that there is a SPACE between
1069     ** the name and sockhost (if present). The receiving
1070     ** server will start the information field from this
1071     ** first blank and thus puts the sockhost into info.
1072     ** ...a bit tricky, but you have been warned, besides
1073     ** code is more neat this way... --msa
1074     */
1075     client_p->servptr = &me;
1076    
1077     if (IsClosing(client_p))
1078     return;
1079    
1080     SetServer(client_p);
1081    
1082     /* Update the capability combination usage counts. -A1kmm */
1083     set_chcap_usage_counts(client_p);
1084    
1085     /* Some day, all these lists will be consolidated *sigh* */
1086 michael 889 dlinkAdd(client_p, &client_p->lnode, &me.serv->server_list);
1087 adx 30
1088 michael 1126 assert(dlinkFind(&unknown_list, client_p));
1089 adx 30
1090 michael 1126 dlink_move_node(&client_p->localClient->lclient_node,
1091     &unknown_list, &serv_list);
1092 adx 30
1093     Count.myserver++;
1094    
1095     dlinkAdd(client_p, make_dlink_node(), &global_serv_list);
1096     hash_add_client(client_p);
1097    
1098     /* doesnt duplicate client_p->serv if allocated this struct already */
1099     make_server(client_p);
1100    
1101     /* fixing eob timings.. -gnp */
1102     client_p->firsttime = CurrentTime;
1103    
1104     /* Show the real host/IP to admins */
1105     sendto_realops_flags(UMODE_ALL, L_ADMIN,
1106     "Link with %s established: (%s) link",
1107     inpath_ip,show_capabilities(client_p));
1108     /* Now show the masked hostname/IP to opers */
1109     sendto_realops_flags(UMODE_ALL, L_OPER,
1110     "Link with %s established: (%s) link",
1111     inpath,show_capabilities(client_p));
1112     ilog(L_NOTICE, "Link with %s established: (%s) link",
1113     inpath_ip, show_capabilities(client_p));
1114    
1115     client_p->serv->sconf = conf;
1116    
1117     if (HasServlink(client_p))
1118     {
1119     /* we won't overflow FD_DESC_SZ here, as it can hold
1120     * client_p->name + 64
1121     */
1122     fd_note(&client_p->localClient->fd, "slink data: %s", client_p->name);
1123     fd_note(&client_p->localClient->ctrlfd, "slink ctrl: %s", client_p->name);
1124     }
1125     else
1126     fd_note(&client_p->localClient->fd, "Server: %s", client_p->name);
1127    
1128     /* Old sendto_serv_but_one() call removed because we now
1129     ** need to send different names to different servers
1130     ** (domain name matching) Send new server to other servers.
1131     */
1132     DLINK_FOREACH(ptr, serv_list.head)
1133     {
1134     target_p = ptr->data;
1135    
1136     if (target_p == client_p)
1137     continue;
1138    
1139     if (IsCapable(target_p, CAP_TS6) && HasID(client_p))
1140     sendto_one(target_p, ":%s SID %s 2 %s :%s%s",
1141     me.id, client_p->name, client_p->id,
1142     IsHidden(client_p) ? "(H) " : "",
1143     client_p->info);
1144     else
1145     sendto_one(target_p,":%s SERVER %s 2 :%s%s",
1146     me.name, client_p->name,
1147     IsHidden(client_p) ? "(H) " : "",
1148     client_p->info);
1149     }
1150    
1151     /* Pass on my client information to the new server
1152     **
1153     ** First, pass only servers (idea is that if the link gets
1154     ** cancelled beacause the server was already there,
1155     ** there are no NICK's to be cancelled...). Of course,
1156     ** if cancellation occurs, all this info is sent anyway,
1157     ** and I guess the link dies when a read is attempted...? --msa
1158     **
1159     ** Note: Link cancellation to occur at this point means
1160     ** that at least two servers from my fragment are building
1161     ** up connection this other fragment at the same time, it's
1162     ** a race condition, not the normal way of operation...
1163     **
1164     ** ALSO NOTE: using the get_client_name for server names--
1165     ** see previous *WARNING*!!! (Also, original inpath
1166     ** is destroyed...)
1167     */
1168    
1169     DLINK_FOREACH_PREV(ptr, global_serv_list.tail)
1170     {
1171     target_p = ptr->data;
1172    
1173     /* target_p->from == target_p for target_p == client_p */
1174 michael 1118 if (IsMe(target_p) || target_p->from == client_p)
1175 adx 30 continue;
1176    
1177     if (IsCapable(client_p, CAP_TS6))
1178     {
1179     if (HasID(target_p))
1180     sendto_one(client_p, ":%s SID %s %d %s :%s%s",
1181     ID(target_p->servptr), target_p->name, target_p->hopcount+1,
1182     target_p->id, IsHidden(target_p) ? "(H) " : "",
1183     target_p->info);
1184     else /* introducing non-ts6 server */
1185     sendto_one(client_p, ":%s SERVER %s %d :%s%s",
1186     ID(target_p->servptr), target_p->name, target_p->hopcount+1,
1187     IsHidden(target_p) ? "(H) " : "", target_p->info);
1188     }
1189     else
1190     sendto_one(client_p, ":%s SERVER %s %d :%s%s",
1191     target_p->servptr->name, target_p->name, target_p->hopcount+1,
1192     IsHidden(target_p) ? "(H) " : "", target_p->info);
1193     }
1194    
1195     server_burst(client_p);
1196     }
1197    
1198     static void
1199     start_io(struct Client *server)
1200     {
1201     struct LocalUser *lserver = server->localClient;
1202     int alloclen = 1;
1203     char *buf;
1204     dlink_node *ptr;
1205     struct dbuf_block *block;
1206    
1207     /* calculate how many bytes to allocate */
1208     if (IsCapable(server, CAP_ZIP))
1209     alloclen += 6;
1210     #ifdef HAVE_LIBCRYPTO
1211     if (IsCapable(server, CAP_ENC))
1212     alloclen += 16 + lserver->in_cipher->keylen + lserver->out_cipher->keylen;
1213     #endif
1214     alloclen += dbuf_length(&lserver->buf_recvq);
1215     alloclen += dlink_list_length(&lserver->buf_recvq.blocks) * 3;
1216     alloclen += dbuf_length(&lserver->buf_sendq);
1217     alloclen += dlink_list_length(&lserver->buf_sendq.blocks) * 3;
1218    
1219     /* initialize servlink control sendq */
1220     lserver->slinkq = buf = MyMalloc(alloclen);
1221     lserver->slinkq_ofs = 0;
1222     lserver->slinkq_len = alloclen;
1223    
1224     if (IsCapable(server, CAP_ZIP))
1225     {
1226     /* ziplink */
1227     *buf++ = SLINKCMD_SET_ZIP_OUT_LEVEL;
1228     *buf++ = 0; /* | */
1229     *buf++ = 1; /* \ len is 1 */
1230     *buf++ = ConfigFileEntry.compression_level;
1231     *buf++ = SLINKCMD_START_ZIP_IN;
1232     *buf++ = SLINKCMD_START_ZIP_OUT;
1233     }
1234     #ifdef HAVE_LIBCRYPTO
1235     if (IsCapable(server, CAP_ENC))
1236     {
1237     /* Decryption settings */
1238     *buf++ = SLINKCMD_SET_CRYPT_IN_CIPHER;
1239     *buf++ = 0; /* / (upper 8-bits of len) */
1240     *buf++ = 1; /* \ cipher id is 1 byte (lower 8-bits of len) */
1241     *buf++ = lserver->in_cipher->cipherid;
1242     *buf++ = SLINKCMD_SET_CRYPT_IN_KEY;
1243     *buf++ = 0; /* keylen < 256 */
1244     *buf++ = lserver->in_cipher->keylen;
1245     memcpy(buf, lserver->in_key, lserver->in_cipher->keylen);
1246     buf += lserver->in_cipher->keylen;
1247     /* Encryption settings */
1248     *buf++ = SLINKCMD_SET_CRYPT_OUT_CIPHER;
1249     *buf++ = 0; /* / (upper 8-bits of len) */
1250     *buf++ = 1; /* \ cipher id is 1 byte (lower 8-bits of len) */
1251     *buf++ = lserver->out_cipher->cipherid;
1252     *buf++ = SLINKCMD_SET_CRYPT_OUT_KEY;
1253     *buf++ = 0; /* keylen < 256 */
1254     *buf++ = lserver->out_cipher->keylen;
1255     memcpy(buf, lserver->out_key, lserver->out_cipher->keylen);
1256     buf += lserver->out_cipher->keylen;
1257     *buf++ = SLINKCMD_START_CRYPT_IN;
1258     *buf++ = SLINKCMD_START_CRYPT_OUT;
1259     }
1260     #endif
1261    
1262     /* pass the whole recvq to servlink */
1263     DLINK_FOREACH (ptr, lserver->buf_recvq.blocks.head)
1264     {
1265     block = ptr->data;
1266     *buf++ = SLINKCMD_INJECT_RECVQ;
1267     *buf++ = (block->size >> 8);
1268     *buf++ = (block->size & 0xff);
1269     memcpy(buf, &block->data[0], block->size);
1270     buf += block->size;
1271     }
1272 michael 329
1273 adx 30 dbuf_clear(&lserver->buf_recvq);
1274    
1275     /* pass the whole sendq to servlink */
1276     DLINK_FOREACH (ptr, lserver->buf_sendq.blocks.head)
1277     {
1278     block = ptr->data;
1279     *buf++ = SLINKCMD_INJECT_SENDQ;
1280     *buf++ = (block->size >> 8);
1281     *buf++ = (block->size & 0xff);
1282     memcpy(buf, &block->data[0], block->size);
1283     buf += block->size;
1284     }
1285 michael 329
1286 adx 30 dbuf_clear(&lserver->buf_sendq);
1287    
1288     /* start io */
1289     *buf++ = SLINKCMD_INIT;
1290    
1291     /* schedule a write */
1292     send_queued_slink_write(server);
1293     }
1294    
1295     /* fork_server()
1296     *
1297     * inputs - struct Client *server
1298     * output - success: 0 / failure: -1
1299     * side effect - fork, and exec SERVLINK to handle this connection
1300     */
1301     static int
1302     fork_server(struct Client *server)
1303     {
1304     #ifndef HAVE_SOCKETPAIR
1305     return -1;
1306     #else
1307     int i;
1308     int slink_fds[2][2];
1309     /* 0? - ctrl | 1? - data
1310     * ?0 - child | ?1 - parent */
1311    
1312     if (socketpair(AF_UNIX, SOCK_STREAM, 0, slink_fds[0]) < 0)
1313     return -1;
1314     if (socketpair(AF_UNIX, SOCK_STREAM, 0, slink_fds[1]) < 0)
1315     goto free_ctrl_fds;
1316    
1317     if ((i = fork()) < 0)
1318     {
1319     close(slink_fds[1][0]); close(slink_fds[1][1]);
1320     free_ctrl_fds:
1321     close(slink_fds[0][0]); close(slink_fds[0][1]);
1322     return -1;
1323     }
1324    
1325     if (i == 0)
1326     {
1327     char fd_str[3][6]; /* store 3x sizeof("65535") */
1328     char *kid_argv[7];
1329    
1330     #ifdef O_ASYNC
1331     fcntl(server->localClient->fd.fd, F_SETFL,
1332     fcntl(server->localClient->fd.fd, F_GETFL, 0) & ~O_ASYNC);
1333     #endif
1334     close_fds(&server->localClient->fd);
1335     close(slink_fds[0][1]);
1336     close(slink_fds[1][1]);
1337    
1338     sprintf(fd_str[0], "%d", slink_fds[0][0]);
1339     sprintf(fd_str[1], "%d", slink_fds[1][0]);
1340     sprintf(fd_str[2], "%d", server->localClient->fd.fd);
1341    
1342     kid_argv[0] = "-slink";
1343     kid_argv[1] = kid_argv[2] = fd_str[0]; /* ctrl */
1344     kid_argv[3] = kid_argv[4] = fd_str[1]; /* data */
1345     kid_argv[5] = fd_str[2]; /* network */
1346     kid_argv[6] = NULL;
1347    
1348     execv(ConfigFileEntry.servlink_path, kid_argv);
1349    
1350     _exit(1);
1351     }
1352    
1353     /* close the network fd and the child ends of the pipes */
1354     fd_close(&server->localClient->fd);
1355     close(slink_fds[0][0]);
1356     close(slink_fds[1][0]);
1357    
1358     execute_callback(setup_socket_cb, slink_fds[0][1]);
1359     execute_callback(setup_socket_cb, slink_fds[1][1]);
1360    
1361     fd_open(&server->localClient->ctrlfd, slink_fds[0][1], 1, "slink ctrl");
1362     fd_open(&server->localClient->fd, slink_fds[1][1], 1, "slink data");
1363    
1364     read_ctrl_packet(&server->localClient->ctrlfd, server);
1365     read_packet(&server->localClient->fd, server);
1366    
1367     return 0;
1368     #endif
1369     }
1370    
1371     /* server_burst()
1372     *
1373     * inputs - struct Client pointer server
1374     * -
1375     * output - none
1376     * side effects - send a server burst
1377     * bugs - still too long
1378     */
1379     static void
1380     server_burst(struct Client *client_p)
1381     {
1382     /* Send it in the shortened format with the TS, if
1383     ** it's a TS server; walk the list of channels, sending
1384     ** all the nicks that haven't been sent yet for each
1385     ** channel, then send the channel itself -- it's less
1386     ** obvious than sending all nicks first, but on the
1387     ** receiving side memory will be allocated more nicely
1388     ** saving a few seconds in the handling of a split
1389     ** -orabidoo
1390     */
1391    
1392 michael 885 burst_all(client_p);
1393 adx 30
1394     /* EOB stuff is now in burst_all */
1395     /* Always send a PING after connect burst is done */
1396     sendto_one(client_p, "PING :%s", ID_or_name(&me, client_p));
1397     }
1398    
1399     /* burst_all()
1400     *
1401     * inputs - pointer to server to send burst to
1402     * output - NONE
1403     * side effects - complete burst of channels/nicks is sent to client_p
1404     */
1405     static void
1406     burst_all(struct Client *client_p)
1407     {
1408 michael 329 dlink_node *ptr = NULL;
1409 adx 30
1410 michael 329 DLINK_FOREACH(ptr, global_channel_list.head)
1411 adx 30 {
1412 michael 329 struct Channel *chptr = ptr->data;
1413 adx 30
1414     if (dlink_list_length(&chptr->members) != 0)
1415     {
1416     burst_members(client_p, chptr);
1417     send_channel_modes(client_p, chptr);
1418 michael 329
1419     if (IsCapable(client_p, CAP_TBURST) ||
1420     IsCapable(client_p, CAP_TB))
1421 adx 30 send_tb(client_p, chptr);
1422     }
1423     }
1424    
1425     /* also send out those that are not on any channel
1426     */
1427     DLINK_FOREACH(ptr, global_client_list.head)
1428     {
1429 michael 329 struct Client *target_p = ptr->data;
1430 adx 30
1431     if (!IsBursted(target_p) && target_p->from != client_p)
1432     sendnick_TS(client_p, target_p);
1433    
1434     ClearBursted(target_p);
1435     }
1436    
1437     /* We send the time we started the burst, and let the remote host determine an EOB time,
1438     ** as otherwise we end up sending a EOB of 0 Sending here means it gets sent last -- fl
1439     */
1440     /* Its simpler to just send EOB and use the time its been connected.. --fl_ */
1441     if (IsCapable(client_p, CAP_EOB))
1442     sendto_one(client_p, ":%s EOB", ID_or_name(&me, client_p));
1443     }
1444    
1445     /*
1446     * send_tb
1447     *
1448 michael 329 * inputs - pointer to Client
1449     * - pointer to channel
1450     * output - NONE
1451     * side effects - Called on a server burst when
1452     * server is CAP_TB|CAP_TBURST capable
1453 adx 30 */
1454     static void
1455     send_tb(struct Client *client_p, struct Channel *chptr)
1456     {
1457 michael 329 /*
1458 michael 337 * We may also send an empty topic here, but only if topic_time isn't 0,
1459     * i.e. if we had a topic that got unset. This is required for syncing
1460     * topics properly.
1461     *
1462     * Imagine the following scenario: Our downlink introduces a channel
1463     * to us with a TS that is equal to ours, but the channel topic on
1464     * their side got unset while the servers were in splitmode, which means
1465     * their 'topic' is newer. They simply wanted to unset it, so we have to
1466     * deal with it in a more sophisticated fashion instead of just resetting
1467     * it to their old topic they had before. Read m_tburst.c:ms_tburst
1468     * for further information -Michael
1469 michael 329 */
1470 michael 337 if (chptr->topic_time != 0)
1471 adx 30 {
1472 michael 329 if (IsCapable(client_p, CAP_TBURST))
1473     sendto_one(client_p, ":%s TBURST %lu %s %lu %s :%s",
1474     me.name, (unsigned long)chptr->channelts, chptr->chname,
1475 michael 337 (unsigned long)chptr->topic_time,
1476     chptr->topic_info ? chptr->topic_info : "",
1477     chptr->topic ? chptr->topic : "");
1478 michael 329 else if (IsCapable(client_p, CAP_TB))
1479 adx 30 {
1480 michael 329 if (ConfigChannel.burst_topicwho)
1481     {
1482     sendto_one(client_p, ":%s TB %s %lu %s :%s",
1483     me.name, chptr->chname,
1484     (unsigned long)chptr->topic_time,
1485 michael 337 chptr->topic_info, chptr->topic ? chptr->topic : "");
1486 michael 329 }
1487     else
1488     {
1489     sendto_one(client_p, ":%s TB %s %lu :%s",
1490     me.name, chptr->chname,
1491 michael 337 (unsigned long)chptr->topic_time,
1492     chptr->topic ? chptr->topic : "");
1493 michael 329 }
1494 adx 30 }
1495     }
1496     }
1497    
1498     /* burst_members()
1499     *
1500     * inputs - pointer to server to send members to
1501     * - dlink_list pointer to membership list to send
1502     * output - NONE
1503     * side effects -
1504     */
1505     static void
1506     burst_members(struct Client *client_p, struct Channel *chptr)
1507     {
1508     struct Client *target_p;
1509     struct Membership *ms;
1510     dlink_node *ptr;
1511    
1512     DLINK_FOREACH(ptr, chptr->members.head)
1513     {
1514     ms = ptr->data;
1515     target_p = ms->client_p;
1516    
1517     if (!IsBursted(target_p))
1518     {
1519     SetBursted(target_p);
1520    
1521     if (target_p->from != client_p)
1522     sendnick_TS(client_p, target_p);
1523     }
1524     }
1525     }
1526    
1527     /* New server connection code
1528     * Based upon the stuff floating about in s_bsd.c
1529     * -- adrian
1530     */
1531    
1532     /* serv_connect() - initiate a server connection
1533     *
1534     * inputs - pointer to conf
1535     * - pointer to client doing the connect
1536     * output -
1537     * side effects -
1538     *
1539     * This code initiates a connection to a server. It first checks to make
1540     * sure the given server exists. If this is the case, it creates a socket,
1541     * creates a client, saves the socket information in the client, and
1542     * initiates a connection to the server through comm_connect_tcp(). The
1543     * completion of this goes through serv_completed_connection().
1544     *
1545     * We return 1 if the connection is attempted, since we don't know whether
1546     * it suceeded or not, and 0 if it fails in here somewhere.
1547     */
1548     int
1549     serv_connect(struct AccessItem *aconf, struct Client *by)
1550     {
1551     struct ConfItem *conf;
1552     struct Client *client_p;
1553     char buf[HOSTIPLEN];
1554    
1555     /* conversion structs */
1556     struct sockaddr_in *v4;
1557     /* Make sure aconf is useful */
1558     assert(aconf != NULL);
1559    
1560     if(aconf == NULL)
1561     return (0);
1562    
1563     /* XXX should be passing struct ConfItem in the first place */
1564     conf = unmap_conf_item(aconf);
1565    
1566     /* log */
1567 michael 1123 getnameinfo((struct sockaddr *)&aconf->ipnum, aconf->ipnum.ss_len,
1568     buf, sizeof(buf), NULL, 0, NI_NUMERICHOST);
1569 adx 30 ilog(L_NOTICE, "Connect to %s[%s] @%s", aconf->user, aconf->host,
1570     buf);
1571    
1572     /* Still processing a DNS lookup? -> exit */
1573 michael 992 if (aconf->dns_pending)
1574 adx 30 {
1575 michael 992 sendto_realops_flags(UMODE_ALL, L_ALL,
1576     "Error connecting to %s: DNS lookup for connect{} in progress.",
1577     conf->name);
1578 adx 30 return (0);
1579     }
1580    
1581 michael 992 if (aconf->dns_failed)
1582     {
1583     sendto_realops_flags(UMODE_ALL, L_ALL,
1584     "Error connecting to %s: DNS lookup for connect{} failed.",
1585     conf->name);
1586     return (0);
1587     }
1588    
1589 adx 30 /* Make sure this server isn't already connected
1590     * Note: aconf should ALWAYS be a valid C: line
1591     */
1592     if ((client_p = find_server(conf->name)) != NULL)
1593     {
1594     sendto_realops_flags(UMODE_ALL, L_ADMIN,
1595     "Server %s already present from %s",
1596     conf->name, get_client_name(client_p, SHOW_IP));
1597     sendto_realops_flags(UMODE_ALL, L_OPER,
1598     "Server %s already present from %s",
1599     conf->name, get_client_name(client_p, MASK_IP));
1600     if (by && IsClient(by) && !MyClient(by))
1601     sendto_one(by, ":%s NOTICE %s :Server %s already present from %s",
1602     me.name, by->name, conf->name,
1603     get_client_name(client_p, MASK_IP));
1604     return (0);
1605     }
1606    
1607     /* Create a local client */
1608     client_p = make_client(NULL);
1609    
1610     /* Copy in the server, hostname, fd */
1611     strlcpy(client_p->name, conf->name, sizeof(client_p->name));
1612     strlcpy(client_p->host, aconf->host, sizeof(client_p->host));
1613    
1614     /* We already converted the ip once, so lets use it - stu */
1615 michael 1115 strlcpy(client_p->sockhost, buf, sizeof(client_p->sockhost));
1616 adx 30
1617     /* create a socket for the server connection */
1618     if (comm_open(&client_p->localClient->fd, aconf->ipnum.ss.ss_family,
1619     SOCK_STREAM, 0, NULL) < 0)
1620     {
1621     /* Eek, failure to create the socket */
1622     report_error(L_ALL,
1623     "opening stream socket to %s: %s", conf->name, errno);
1624     SetDead(client_p);
1625     exit_client(client_p, &me, "Connection failed");
1626     return (0);
1627     }
1628    
1629     /* servernames are always guaranteed under HOSTLEN chars */
1630     fd_note(&client_p->localClient->fd, "Server: %s", conf->name);
1631    
1632     /* Attach config entries to client here rather than in
1633     * serv_connect_callback(). This to avoid null pointer references.
1634     */
1635     if (!attach_connect_block(client_p, conf->name, aconf->host))
1636     {
1637     sendto_realops_flags(UMODE_ALL, L_ALL,
1638     "Host %s is not enabled for connecting:no C/N-line",
1639     conf->name);
1640     if (by && IsClient(by) && !MyClient(by))
1641     sendto_one(by, ":%s NOTICE %s :Connect to host %s failed.",
1642     me.name, by->name, client_p->name);
1643     SetDead(client_p);
1644     exit_client(client_p, client_p, "Connection failed");
1645     return (0);
1646     }
1647    
1648     /* at this point we have a connection in progress and C/N lines
1649     * attached to the client, the socket info should be saved in the
1650     * client and it should either be resolved or have a valid address.
1651     *
1652     * The socket has been connected or connect is in progress.
1653     */
1654     make_server(client_p);
1655    
1656     if (by && IsClient(by))
1657     strlcpy(client_p->serv->by, by->name, sizeof(client_p->serv->by));
1658     else
1659     strlcpy(client_p->serv->by, "AutoConn.", sizeof(client_p->serv->by));
1660    
1661     SetConnecting(client_p);
1662     dlinkAdd(client_p, &client_p->node, &global_client_list);
1663     /* from def_fam */
1664     client_p->localClient->aftype = aconf->aftype;
1665    
1666     /* Now, initiate the connection */
1667     /* XXX assume that a non 0 type means a specific bind address
1668     * for this connect.
1669     */
1670     switch (aconf->aftype)
1671     {
1672     case AF_INET:
1673     v4 = (struct sockaddr_in*)&aconf->my_ipnum;
1674     if (v4->sin_addr.s_addr != 0)
1675     {
1676     struct irc_ssaddr ipn;
1677     memset(&ipn, 0, sizeof(struct irc_ssaddr));
1678     ipn.ss.ss_family = AF_INET;
1679     ipn.ss_port = 0;
1680     memcpy(&ipn, &aconf->my_ipnum, sizeof(struct irc_ssaddr));
1681     comm_connect_tcp(&client_p->localClient->fd, aconf->host, aconf->port,
1682     (struct sockaddr *)&ipn, ipn.ss_len,
1683     serv_connect_callback, client_p, aconf->aftype,
1684     CONNECTTIMEOUT);
1685     }
1686     else if (ServerInfo.specific_ipv4_vhost)
1687     {
1688     struct irc_ssaddr ipn;
1689     memset(&ipn, 0, sizeof(struct irc_ssaddr));
1690     ipn.ss.ss_family = AF_INET;
1691     ipn.ss_port = 0;
1692     memcpy(&ipn, &ServerInfo.ip, sizeof(struct irc_ssaddr));
1693     comm_connect_tcp(&client_p->localClient->fd, aconf->host, aconf->port,
1694     (struct sockaddr *)&ipn, ipn.ss_len,
1695     serv_connect_callback, client_p, aconf->aftype,
1696     CONNECTTIMEOUT);
1697     }
1698     else
1699     comm_connect_tcp(&client_p->localClient->fd, aconf->host, aconf->port,
1700     NULL, 0, serv_connect_callback, client_p, aconf->aftype,
1701     CONNECTTIMEOUT);
1702     break;
1703     #ifdef IPV6
1704     case AF_INET6:
1705     {
1706     struct irc_ssaddr ipn;
1707     struct sockaddr_in6 *v6;
1708     struct sockaddr_in6 *v6conf;
1709    
1710     memset(&ipn, 0, sizeof(struct irc_ssaddr));
1711     v6conf = (struct sockaddr_in6 *)&aconf->my_ipnum;
1712     v6 = (struct sockaddr_in6 *)&ipn;
1713    
1714     if (memcmp(&v6conf->sin6_addr, &v6->sin6_addr,
1715     sizeof(struct in6_addr)) != 0)
1716     {
1717     memcpy(&ipn, &aconf->my_ipnum, sizeof(struct irc_ssaddr));
1718     ipn.ss.ss_family = AF_INET6;
1719     ipn.ss_port = 0;
1720     comm_connect_tcp(&client_p->localClient->fd,
1721     aconf->host, aconf->port,
1722     (struct sockaddr *)&ipn, ipn.ss_len,
1723     serv_connect_callback, client_p,
1724     aconf->aftype, CONNECTTIMEOUT);
1725     }
1726     else if (ServerInfo.specific_ipv6_vhost)
1727     {
1728     memcpy(&ipn, &ServerInfo.ip6, sizeof(struct irc_ssaddr));
1729     ipn.ss.ss_family = AF_INET6;
1730     ipn.ss_port = 0;
1731     comm_connect_tcp(&client_p->localClient->fd,
1732     aconf->host, aconf->port,
1733     (struct sockaddr *)&ipn, ipn.ss_len,
1734     serv_connect_callback, client_p,
1735     aconf->aftype, CONNECTTIMEOUT);
1736     }
1737     else
1738     comm_connect_tcp(&client_p->localClient->fd,
1739     aconf->host, aconf->port,
1740     NULL, 0, serv_connect_callback, client_p,
1741     aconf->aftype, CONNECTTIMEOUT);
1742     }
1743     #endif
1744     }
1745     return (1);
1746     }
1747    
1748     /* serv_connect_callback() - complete a server connection.
1749     *
1750     * This routine is called after the server connection attempt has
1751     * completed. If unsucessful, an error is sent to ops and the client
1752     * is closed. If sucessful, it goes through the initialisation/check
1753     * procedures, the capabilities are sent, and the socket is then
1754     * marked for reading.
1755     */
1756     static void
1757     serv_connect_callback(fde_t *fd, int status, void *data)
1758     {
1759     struct Client *client_p = data;
1760     struct ConfItem *conf=NULL;
1761     struct AccessItem *aconf=NULL;
1762    
1763     /* First, make sure its a real client! */
1764     assert(client_p != NULL);
1765     assert(&client_p->localClient->fd == fd);
1766    
1767     /* Next, for backward purposes, record the ip of the server */
1768     memcpy(&client_p->localClient->ip, &fd->connect.hostaddr,
1769     sizeof(struct irc_ssaddr));
1770     /* Check the status */
1771     if (status != COMM_OK)
1772     {
1773     /* We have an error, so report it and quit
1774     * Admins get to see any IP, mere opers don't *sigh*
1775     */
1776     if (ConfigServerHide.hide_server_ips)
1777     sendto_realops_flags(UMODE_ALL, L_ADMIN,
1778     "Error connecting to %s: %s",
1779     client_p->name, comm_errstr(status));
1780     else
1781     sendto_realops_flags(UMODE_ALL, L_ADMIN,
1782     "Error connecting to %s[%s]: %s", client_p->name,
1783     client_p->host, comm_errstr(status));
1784    
1785     sendto_realops_flags(UMODE_ALL, L_OPER,
1786     "Error connecting to %s: %s",
1787     client_p->name, comm_errstr(status));
1788    
1789     /* If a fd goes bad, call dead_link() the socket is no
1790     * longer valid for reading or writing.
1791     */
1792     dead_link_on_write(client_p, 0);
1793     return;
1794     }
1795    
1796     /* COMM_OK, so continue the connection procedure */
1797     /* Get the C/N lines */
1798     conf = find_conf_name(&client_p->localClient->confs,
1799     client_p->name, SERVER_TYPE);
1800     if (conf == NULL)
1801     {
1802     sendto_realops_flags(UMODE_ALL, L_ADMIN,
1803     "Lost connect{} block for %s", get_client_name(client_p, HIDE_IP));
1804     sendto_realops_flags(UMODE_ALL, L_OPER,
1805     "Lost connect{} block for %s", get_client_name(client_p, MASK_IP));
1806    
1807     exit_client(client_p, &me, "Lost connect{} block");
1808     return;
1809     }
1810    
1811     aconf = (struct AccessItem *)map_to_conf(conf);
1812     /* Next, send the initial handshake */
1813     SetHandshake(client_p);
1814    
1815     #ifdef HAVE_LIBCRYPTO
1816     /* Handle all CRYPTLINK links in cryptlink_init */
1817     if (IsConfCryptLink(aconf))
1818     {
1819     cryptlink_init(client_p, conf, fd);
1820     return;
1821     }
1822     #endif
1823    
1824     /* jdc -- Check and send spasswd, not passwd. */
1825 michael 1115 if (!EmptyString(aconf->spasswd))
1826 adx 30 /* Send TS 6 form only if id */
1827     sendto_one(client_p, "PASS %s TS %d %s",
1828     aconf->spasswd, TS_CURRENT, me.id);
1829    
1830     /* Pass my info to the new server
1831     *
1832     * Pass on ZIP if supported
1833     * Pass on TB if supported.
1834     * - Dianora
1835     */
1836 michael 1119 send_capabilities(client_p, aconf,
1837     (IsConfCompressed(aconf) ? CAP_ZIP : 0)
1838 michael 329 | (IsConfTopicBurst(aconf) ? CAP_TBURST|CAP_TB : 0), 0);
1839 adx 30
1840     sendto_one(client_p, "SERVER %s 1 :%s%s",
1841 michael 1118 me.name, ConfigServerHide.hidden ? "(H) " : "",
1842 adx 30 me.info);
1843    
1844     /* If we've been marked dead because a send failed, just exit
1845     * here now and save everyone the trouble of us ever existing.
1846     */
1847     if (IsDead(client_p))
1848     {
1849     sendto_realops_flags(UMODE_ALL, L_ADMIN,
1850     "%s[%s] went dead during handshake",
1851     client_p->name,
1852     client_p->host);
1853     sendto_realops_flags(UMODE_ALL, L_OPER,
1854     "%s went dead during handshake", client_p->name);
1855     return;
1856     }
1857    
1858     /* don't move to serv_list yet -- we haven't sent a burst! */
1859     /* If we get here, we're ok, so lets start reading some data */
1860     comm_setselect(fd, COMM_SELECT_READ, read_packet, client_p, 0);
1861     }
1862    
1863     struct Client *
1864     find_servconn_in_progress(const char *name)
1865     {
1866     dlink_node *ptr;
1867     struct Client *cptr;
1868    
1869     DLINK_FOREACH(ptr, unknown_list.head)
1870     {
1871     cptr = ptr->data;
1872    
1873     if (cptr && cptr->name[0])
1874 michael 1118 if (match(name, cptr->name))
1875 adx 30 return cptr;
1876     }
1877    
1878     return NULL;
1879     }
1880    
1881     #ifdef HAVE_LIBCRYPTO
1882     /*
1883     * sends a CRYPTLINK SERV command.
1884     */
1885     void
1886     cryptlink_init(struct Client *client_p, struct ConfItem *conf, fde_t *fd)
1887     {
1888     struct AccessItem *aconf;
1889     char *encrypted;
1890     unsigned char *key_to_send;
1891     char randkey[CIPHERKEYLEN];
1892     int enc_len;
1893    
1894     /* get key */
1895     if ((!ServerInfo.rsa_private_key) ||
1896     (!RSA_check_key(ServerInfo.rsa_private_key)) )
1897     {
1898     cryptlink_error(client_p, "SERV", "Invalid RSA private key",
1899     "Invalid RSA private key");
1900     return;
1901     }
1902    
1903     aconf = (struct AccessItem *)map_to_conf(conf);
1904    
1905     if (aconf->rsa_public_key == NULL)
1906     {
1907     cryptlink_error(client_p, "SERV", "Invalid RSA public key",
1908     "Invalid RSA public key");
1909     return;
1910     }
1911    
1912     if (get_randomness((unsigned char *)randkey, CIPHERKEYLEN) != 1)
1913     {
1914     cryptlink_error(client_p, "SERV", "Couldn't generate keyphrase",
1915     "Couldn't generate keyphrase");
1916     return;
1917     }
1918    
1919     encrypted = MyMalloc(RSA_size(ServerInfo.rsa_private_key));
1920     enc_len = RSA_public_encrypt(CIPHERKEYLEN,
1921     (unsigned char *)randkey,
1922     (unsigned char *)encrypted,
1923     aconf->rsa_public_key,
1924     RSA_PKCS1_PADDING);
1925    
1926     memcpy(client_p->localClient->in_key, randkey, CIPHERKEYLEN);
1927    
1928     if (enc_len <= 0)
1929     {
1930     report_crypto_errors();
1931     MyFree(encrypted);
1932     cryptlink_error(client_p, "SERV", "Couldn't encrypt data",
1933     "Couldn't encrypt data");
1934     return;
1935     }
1936    
1937     if (!(base64_block(&key_to_send, encrypted, enc_len)))
1938     {
1939     MyFree(encrypted);
1940     cryptlink_error(client_p, "SERV", "Couldn't base64 encode key",
1941     "Couldn't base64 encode key");
1942     return;
1943     }
1944    
1945 michael 1119 send_capabilities(client_p, aconf,
1946     (IsConfCompressed(aconf) ? CAP_ZIP : 0)
1947 michael 329 | (IsConfTopicBurst(aconf) ? CAP_TBURST|CAP_TB : 0), CAP_ENC_MASK);
1948 adx 30
1949 michael 1115 sendto_one(client_p, "PASS . TS %d %s", TS_CURRENT, me.id);
1950 adx 30 sendto_one(client_p, "CRYPTLINK SERV %s %s :%s%s",
1951 michael 1118 me.name, key_to_send,
1952 adx 30 ConfigServerHide.hidden ? "(H) " : "", me.info);
1953    
1954     SetHandshake(client_p);
1955     SetWaitAuth(client_p);
1956    
1957     MyFree(encrypted);
1958     MyFree(key_to_send);
1959    
1960     if (IsDead(client_p))
1961     cryptlink_error(client_p, "SERV", "Went dead during handshake",
1962     "Went dead during handshake");
1963     else if (fd != NULL)
1964     /* If we get here, we're ok, so lets start reading some data */
1965     comm_setselect(fd, COMM_SELECT_READ, read_packet, client_p, 0);
1966     }
1967    
1968     void
1969     cryptlink_error(struct Client *client_p, const char *type,
1970     const char *reason, const char *client_reason)
1971     {
1972     sendto_realops_flags(UMODE_ALL, L_ADMIN, "%s: CRYPTLINK %s error - %s",
1973     get_client_name(client_p, SHOW_IP), type, reason);
1974     sendto_realops_flags(UMODE_ALL, L_OPER, "%s: CRYPTLINK %s error - %s",
1975     get_client_name(client_p, MASK_IP), type, reason);
1976     ilog(L_ERROR, "%s: CRYPTLINK %s error - %s",
1977     get_client_name(client_p, SHOW_IP), type, reason);
1978    
1979     /* If client_reason isn't NULL, then exit the client with the message
1980     * defined in the call.
1981     */
1982     if ((client_reason != NULL) && (!IsDead(client_p)))
1983     exit_client(client_p, &me, client_reason);
1984     }
1985    
1986     static char base64_chars[] =
1987     "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
1988    
1989     static char base64_values[] =
1990     {
1991     /* 00-15 */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
1992     /* 16-31 */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
1993     /* 32-47 */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63,
1994     /* 48-63 */ 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, 0, -1, -1,
1995     /* 64-79 */ -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
1996     /* 80-95 */ 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1,
1997     /* 96-111 */ -1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
1998     /* 112-127 */ 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1,
1999     /* 128-143 */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
2000     /* 144-159 */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
2001     /* 160-175 */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
2002     /* 186-191 */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
2003     /* 192-207 */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
2004     /* 208-223 */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
2005     /* 224-239 */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
2006     /* 240-255 */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1
2007     };
2008    
2009     /*
2010     * base64_block will allocate and return a new block of memory
2011     * using MyMalloc(). It should be freed after use.
2012     */
2013     int
2014     base64_block(unsigned char **output, char *data, int len)
2015     {
2016     unsigned char *out;
2017     unsigned char *in = (unsigned char*)data;
2018     unsigned long int q_in;
2019     int i;
2020     int count = 0;
2021    
2022     out = MyMalloc(((((len + 2) - ((len + 2) % 3)) / 3) * 4) + 1);
2023    
2024     /* process 24 bits at a time */
2025     for( i = 0; i < len; i += 3)
2026     {
2027     q_in = 0;
2028    
2029     if ( i + 2 < len )
2030     {
2031     q_in = (in[i+2] & 0xc0) << 2;
2032     q_in |= in[i+2];
2033     }
2034    
2035     if ( i + 1 < len )
2036     {
2037     q_in |= (in[i+1] & 0x0f) << 10;
2038     q_in |= (in[i+1] & 0xf0) << 12;
2039     }
2040    
2041     q_in |= (in[i] & 0x03) << 20;
2042     q_in |= in[i] << 22;
2043    
2044     q_in &= 0x3f3f3f3f;
2045    
2046     out[count++] = base64_chars[((q_in >> 24) )];
2047     out[count++] = base64_chars[((q_in >> 16) & 0xff)];
2048     out[count++] = base64_chars[((q_in >> 8) & 0xff)];
2049     out[count++] = base64_chars[((q_in ) & 0xff)];
2050     }
2051     if ( (i - len) > 0 )
2052     {
2053     out[count-1] = '=';
2054     if ( (i - len) > 1 )
2055     out[count-2] = '=';
2056     }
2057    
2058     out[count] = '\0';
2059     *output = out;
2060     return (count);
2061     }
2062    
2063     /*
2064     * unbase64_block will allocate and return a new block of memory
2065     * using MyMalloc(). It should be freed after use.
2066     */
2067     int
2068     unbase64_block(unsigned char **output, char *data, int len)
2069     {
2070     unsigned char *out;
2071     unsigned char *in = (unsigned char*)data;
2072     unsigned long int q_in;
2073     int i;
2074     int count = 0;
2075    
2076     if ((len % 4) != 0)
2077     return (0);
2078    
2079     out = MyMalloc(((len / 4) * 3) + 1);
2080    
2081     /* process 32 bits at a time */
2082     for( i = 0; (i + 3) < len; i+=4)
2083     {
2084     /* compress input (chars a, b, c and d) as follows:
2085     * (after converting ascii -> base64 value)
2086     *
2087     * |00000000aaaaaabbbbbbccccccdddddd|
2088     * | 765432 107654 321076 543210|
2089     */
2090    
2091     q_in = 0;
2092    
2093     if (base64_values[in[i+3]] > -1)
2094     q_in |= base64_values[in[i+3]] ;
2095     if (base64_values[in[i+2]] > -1)
2096     q_in |= base64_values[in[i+2]] << 6;
2097     if (base64_values[in[i+1]] > -1)
2098     q_in |= base64_values[in[i+1]] << 12;
2099     if (base64_values[in[i ]] > -1)
2100     q_in |= base64_values[in[i ]] << 18;
2101    
2102     out[count++] = (q_in >> 16) & 0xff;
2103     out[count++] = (q_in >> 8) & 0xff;
2104     out[count++] = (q_in ) & 0xff;
2105     }
2106    
2107     if (in[i-1] == '=') count--;
2108     if (in[i-2] == '=') count--;
2109    
2110     out[count] = '\0';
2111     *output = out;
2112     return (count);
2113     }
2114    
2115     #endif /* HAVE_LIBCRYPTO */
2116    

Properties

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