/[svn]/ircd-hybrid-7.2/src/s_user.c
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Annotation of /ircd-hybrid-7.2/src/s_user.c

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Revision 503 - (hide annotations)
Fri Mar 3 19:53:47 2006 UTC (15 years, 2 months ago) by michael
File MIME type: text/x-chdr
File size: 43060 byte(s)
- Backported CAP changes from HEAD since it doesn't affect
  any of the ircd's core components and should be supported
  as soon as possible.

1 adx 30 /*
2     * ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
3     * s_user.c: User related functions.
4     *
5     * Copyright (C) 2002 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     #include "tools.h"
27     #include "s_user.h"
28     #include "s_misc.h"
29     #include "channel.h"
30     #include "channel_mode.h"
31     #include "client.h"
32     #include "common.h"
33     #include "fdlist.h"
34     #include "hash.h"
35     #include "irc_string.h"
36     #include "sprintf_irc.h"
37     #include "s_bsd.h"
38     #include "irc_getnameinfo.h"
39     #include "ircd.h"
40     #include "list.h"
41     #include "listener.h"
42     #include "motd.h"
43     #include "numeric.h"
44     #include "s_conf.h"
45     #include "s_log.h"
46     #include "s_serv.h"
47     #include "s_stats.h"
48     #include "send.h"
49     #include "supported.h"
50     #include "whowas.h"
51     #include "memory.h"
52     #include "packet.h"
53     #include "userhost.h"
54     #include "hook.h"
55     #include "s_misc.h"
56     #include "msg.h"
57     #include "pcre.h"
58    
59     int MaxClientCount = 1;
60     int MaxConnectionCount = 1;
61     struct Callback *entering_umode_cb = NULL;
62     struct Callback *umode_cb = NULL;
63     struct Callback *uid_get_cb = NULL;
64    
65     static char umode_buffer[IRCD_BUFSIZE];
66    
67     static void user_welcome(struct Client *);
68     static void report_and_set_user_flags(struct Client *, const struct AccessItem *);
69     static int check_xline(struct Client *);
70     static int check_regexp_xline(struct Client *);
71     static void introduce_client(struct Client *, struct Client *);
72     static void *uid_get(va_list);
73    
74     /* Used for building up the isupport string,
75     * used with init_isupport, add_isupport, delete_isupport
76     */
77    
78     struct Isupport
79     {
80     dlink_node node;
81     char *name;
82     char *options;
83     int number;
84     };
85    
86     static dlink_list support_list = { NULL, NULL, 0 };
87     MessageFile *isupportFile;
88    
89     /* memory is cheap. map 0-255 to equivalent mode */
90     unsigned int user_modes[256] =
91     {
92     /* 0x00 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0x0F */
93     /* 0x10 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0x1F */
94     /* 0x20 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0x2F */
95     /* 0x30 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0x3F */
96     0, /* @ */
97     0, /* A */
98     0, /* B */
99     0, /* C */
100     UMODE_DEAF, /* D */
101     0, /* E */
102     0, /* F */
103     UMODE_SOFTCALLERID, /* G */
104     0, /* H */
105     0, /* I */
106     0, /* J */
107     0, /* K */
108     0, /* L */
109     0, /* M */
110     0, /* N */
111     0, /* O */
112     0, /* P */
113     0, /* Q */
114     0, /* R */
115     0, /* S */
116     0, /* T */
117     0, /* U */
118     0, /* V */
119     0, /* W */
120     0, /* X */
121     0, /* Y */
122     0, /* Z 0x5A */
123     0, 0, 0, 0, 0, /* 0x5F */
124     0, /* 0x60 */
125     UMODE_ADMIN, /* a */
126     UMODE_BOTS, /* b */
127     UMODE_CCONN, /* c */
128     UMODE_DEBUG, /* d */
129     0, /* e */
130     UMODE_FULL, /* f */
131     UMODE_CALLERID, /* g */
132     0, /* h */
133     UMODE_INVISIBLE, /* i */
134     0, /* j */
135     UMODE_SKILL, /* k */
136     UMODE_LOCOPS, /* l */
137     0, /* m */
138     UMODE_NCHANGE, /* n */
139     UMODE_OPER, /* o */
140     0, /* p */
141     0, /* q */
142     UMODE_REJ, /* r */
143     UMODE_SERVNOTICE, /* s */
144     0, /* t */
145     UMODE_UNAUTH, /* u */
146     0, /* v */
147     UMODE_WALLOP, /* w */
148     UMODE_EXTERNAL, /* x */
149     UMODE_SPY, /* y */
150     UMODE_OPERWALL, /* z 0x7A */
151     0,0,0,0,0, /* 0x7B - 0x7F */
152    
153     /* 0x80 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0x8F */
154     /* 0x90 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0x9F */
155     /* 0xA0 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0xAF */
156     /* 0xB0 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0xBF */
157     /* 0xC0 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0xCF */
158     /* 0xD0 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0xDF */
159     /* 0xE0 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0xEF */
160     /* 0xF0 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 /* 0xFF */
161     };
162    
163     void
164     assemble_umode_buffer(void)
165     {
166     unsigned int idx = 0;
167     char *umode_buffer_ptr = umode_buffer;
168    
169     for (; idx < (sizeof(user_modes) / sizeof(int)); ++idx)
170     if (user_modes[idx])
171     *umode_buffer_ptr++ = idx;
172    
173     *umode_buffer_ptr = '\0';
174     }
175    
176     /* show_lusers()
177     *
178     * inputs - pointer to client
179     * output - NONE
180     * side effects - display to client user counts etc.
181     */
182     void
183     show_lusers(struct Client *source_p)
184     {
185     const char *from, *to;
186    
187     if (!MyConnect(source_p) && IsCapable(source_p->from, CAP_TS6) && HasID(source_p))
188     {
189     from = me.id;
190     to = source_p->id;
191     }
192     else
193     {
194     from = me.name;
195     to = source_p->name;
196     }
197    
198     if (!ConfigServerHide.hide_servers || IsOper(source_p))
199     sendto_one(source_p, form_str(RPL_LUSERCLIENT),
200     from, to, (Count.total-Count.invisi),
201     Count.invisi, dlink_list_length(&global_serv_list));
202     else
203     sendto_one(source_p, form_str(RPL_LUSERCLIENT), from, to,
204 michael 56 (Count.total-Count.invisi), Count.invisi, 1);
205 adx 30
206     if (Count.oper > 0)
207     sendto_one(source_p, form_str(RPL_LUSEROP),
208 michael 56 from, to, Count.oper);
209 adx 30
210     if (dlink_list_length(&unknown_list) > 0)
211     sendto_one(source_p, form_str(RPL_LUSERUNKNOWN),
212 michael 56 from, to, dlink_list_length(&unknown_list));
213 adx 30
214     if (dlink_list_length(&global_channel_list) > 0)
215     sendto_one(source_p, form_str(RPL_LUSERCHANNELS),
216 michael 56 from, to, dlink_list_length(&global_channel_list));
217 adx 30
218     if (!ConfigServerHide.hide_servers || IsOper(source_p))
219     {
220     sendto_one(source_p, form_str(RPL_LUSERME),
221 michael 56 from, to, Count.local, Count.myserver);
222 adx 30 sendto_one(source_p, form_str(RPL_LOCALUSERS),
223 michael 56 from, to, Count.local, Count.max_loc,
224     Count.local, Count.max_loc);
225 adx 30 }
226     else
227     {
228     sendto_one(source_p, form_str(RPL_LUSERME),
229 michael 56 from, to, Count.total, 0);
230 adx 30 sendto_one(source_p, form_str(RPL_LOCALUSERS),
231 michael 56 from, to, Count.total, Count.max_tot,
232 adx 30 Count.total, Count.max_tot);
233     }
234    
235     sendto_one(source_p, form_str(RPL_GLOBALUSERS),
236     from, to, Count.total, Count.max_tot,
237     Count.total, Count.max_tot);
238    
239     if (!ConfigServerHide.hide_servers || IsOper(source_p))
240     sendto_one(source_p, form_str(RPL_STATSCONN), from, to,
241 michael 56 MaxConnectionCount, MaxClientCount, Count.totalrestartcount);
242 adx 30
243     if (Count.local > MaxClientCount)
244     MaxClientCount = Count.local;
245    
246     if ((Count.local + Count.myserver) > MaxConnectionCount)
247     MaxConnectionCount = Count.local + Count.myserver;
248     }
249    
250     /* show_isupport()
251     *
252     * inputs - pointer to client
253     * output - NONE
254     * side effects - display to client what we support (for them)
255     */
256     void
257     show_isupport(struct Client *source_p)
258     {
259     send_message_file(source_p, isupportFile);
260     }
261    
262     /*
263     ** register_local_user
264     ** This function is called when both NICK and USER messages
265     ** have been accepted for the client, in whatever order. Only
266     ** after this, is the USER message propagated.
267     **
268     ** NICK's must be propagated at once when received, although
269     ** it would be better to delay them too until full info is
270     ** available. Doing it is not so simple though, would have
271     ** to implement the following:
272     **
273     ** (actually it has been implemented already for a while) -orabidoo
274     **
275     ** 1) user telnets in and gives only "NICK foobar" and waits
276     ** 2) another user far away logs in normally with the nick
277     ** "foobar" (quite legal, as this server didn't propagate
278     ** it).
279     ** 3) now this server gets nick "foobar" from outside, but
280     ** has alread the same defined locally. Current server
281     ** would just issue "KILL foobar" to clean out dups. But,
282     ** this is not fair. It should actually request another
283     ** nick from local user or kill him/her...
284     */
285     void
286     register_local_user(struct Client *client_p, struct Client *source_p,
287     const char *nick, const char *username)
288     {
289     const struct AccessItem *aconf = NULL;
290     char ipaddr[HOSTIPLEN];
291 michael 56 dlink_node *ptr = NULL;
292     dlink_node *m = NULL;
293 adx 30
294     assert(source_p != NULL);
295     assert(MyConnect(source_p));
296     assert(source_p->username != username);
297 michael 503 assert(!source_p->localClient->registration);
298 adx 30
299     if (ConfigFileEntry.ping_cookie)
300     {
301     if (!IsPingSent(source_p) &&
302     source_p->localClient->random_ping == 0)
303     {
304     source_p->localClient->random_ping = (unsigned long)rand();
305     sendto_one(source_p, "PING :%lu",
306     source_p->localClient->random_ping);
307     SetPingSent(source_p);
308     return;
309     }
310    
311     if (!HasPingCookie(source_p))
312     return;
313     }
314    
315     source_p->localClient->last = CurrentTime;
316     /* Straight up the maximum rate of flooding... */
317     source_p->localClient->allow_read = MAX_FLOOD_BURST;
318    
319     if (!execute_callback(client_check_cb, source_p, username))
320     return;
321    
322     if (valid_hostname(source_p->host) == 0)
323     {
324     sendto_one(source_p, ":%s NOTICE %s :*** Notice -- You have an illegal "
325     "character in your hostname", me.name, source_p->name);
326     strlcpy(source_p->host, source_p->sockhost,
327     sizeof(source_p->host));
328     }
329    
330     ptr = source_p->localClient->confs.head;
331     aconf = map_to_conf(ptr->data);
332    
333     if (!IsGotId(source_p))
334     {
335     const char *p = NULL;
336     unsigned int i = 0;
337    
338     if (IsNeedIdentd(aconf))
339     {
340     ServerStats->is_ref++;
341     sendto_one(source_p, ":%s NOTICE %s :*** Notice -- You need to install "
342     "identd to use this server", me.name, source_p->name);
343     exit_client(source_p, &me, "Install identd");
344     return;
345     }
346    
347     p = username;
348    
349     if (!IsNoTilde(aconf))
350     source_p->username[i++] = '~';
351    
352     while (*p && i < USERLEN)
353     {
354     if (*p != '[')
355     source_p->username[i++] = *p;
356     p++;
357     }
358    
359     source_p->username[i] = '\0';
360     }
361    
362     /* password check */
363     if (!EmptyString(aconf->passwd))
364     {
365     const char *pass = source_p->localClient->passwd;
366    
367     if (!match_conf_password(pass, aconf))
368     {
369     ServerStats->is_ref++;
370     sendto_one(source_p, form_str(ERR_PASSWDMISMATCH),
371     me.name, source_p->name);
372     exit_client(source_p, &me, "Bad Password");
373     return;
374     }
375     }
376    
377     /* don't free source_p->localClient->passwd here - it can be required
378     * by masked /stats I if there are auth{} blocks with need_password = no;
379     * --adx
380     */
381    
382     /* report if user has &^>= etc. and set flags as needed in source_p */
383     report_and_set_user_flags(source_p, aconf);
384    
385     /* Limit clients -
386     * We want to be able to have servers and F-line clients
387     * connect, so save room for "buffer" connections.
388     * Smaller servers may want to decrease this, and it should
389     * probably be just a percentage of the MAXCLIENTS...
390     * -Taner
391     */
392     /* Except "F:" clients */
393     if ((Count.local >= ServerInfo.max_clients + MAX_BUFFER) ||
394     (Count.local >= ServerInfo.max_clients && !IsExemptLimits(source_p)))
395     {
396     sendto_realops_flags(UMODE_FULL, L_ALL,
397     "Too many clients, rejecting %s[%s].",
398     nick, source_p->host);
399     ServerStats->is_ref++;
400     exit_client(source_p, &me, "Sorry, server is full - try later");
401     return;
402     }
403    
404     /* valid user name check */
405     if (valid_username(source_p->username) == 0)
406     {
407     char tmpstr2[IRCD_BUFSIZE];
408    
409     sendto_realops_flags(UMODE_REJ, L_ALL, "Invalid username: %s (%s@%s)",
410     nick, source_p->username, source_p->host);
411     ServerStats->is_ref++;
412     ircsprintf(tmpstr2, "Invalid username [%s]", source_p->username);
413     exit_client(source_p, &me, tmpstr2);
414     return;
415     }
416    
417     assert(source_p == client_p);
418    
419     /* end of valid user name check */
420     if (check_xline(source_p) || check_regexp_xline(source_p))
421     return;
422    
423     if (IsDead(client_p))
424     return;
425    
426     if (source_p->id[0] == '\0' && me.id[0])
427     {
428 michael 159 char *id = (char *)execute_callback(uid_get_cb, source_p);
429 adx 30 while (hash_find_id(id) != NULL)
430     id = uid_get(NULL);
431    
432     strlcpy(source_p->id, id, sizeof(source_p->id));
433     hash_add_id(source_p);
434     }
435    
436     irc_getnameinfo((struct sockaddr *)&source_p->localClient->ip,
437     source_p->localClient->ip.ss_len, ipaddr,
438     HOSTIPLEN, NULL, 0, NI_NUMERICHOST);
439    
440     sendto_realops_flags(UMODE_CCONN, L_ALL,
441     "Client connecting: %s (%s@%s) [%s] {%s} [%s]",
442     nick, source_p->username, source_p->host,
443     ConfigFileEntry.hide_spoof_ips && IsIPSpoof(source_p) ?
444     "255.255.255.255" : ipaddr, get_client_class(source_p),
445     source_p->info);
446    
447     /* If they have died in send_* don't do anything. */
448     if (IsDead(source_p))
449     return;
450    
451     if (ConfigFileEntry.invisible_on_connect)
452 michael 159 {
453 adx 30 source_p->umodes |= UMODE_INVISIBLE;
454 michael 159 Count.invisi++;
455     }
456 adx 30
457     if ((++Count.local) > Count.max_loc)
458     {
459     Count.max_loc = Count.local;
460    
461     if (!(Count.max_loc % 10))
462     sendto_realops_flags(UMODE_ALL, L_ALL, "New Max Local Clients: %d",
463     Count.max_loc);
464     }
465    
466     SetClient(source_p);
467    
468     source_p->servptr = &me;
469     dlinkAdd(source_p, &source_p->lnode, &source_p->servptr->serv->users);
470    
471     /* Increment our total user count here */
472     if (++Count.total > Count.max_tot)
473     Count.max_tot = Count.total;
474     Count.totalrestartcount++;
475    
476     source_p->localClient->allow_read = MAX_FLOOD_BURST;
477    
478     if ((m = dlinkFindDelete(&unknown_list, source_p)) != NULL)
479     {
480     free_dlink_node(m);
481     dlinkAdd(source_p, &source_p->localClient->lclient_node, &local_client_list);
482     }
483     else assert(0);
484    
485     user_welcome(source_p);
486     add_user_host(source_p->username, source_p->host, 0);
487     SetUserHost(source_p);
488    
489     introduce_client(client_p, source_p);
490     }
491    
492     /* register_remote_user()
493     *
494     * inputs - client_p directly connected client
495     * - source_p remote or directly connected client
496     * - username to register as
497     * - host name to register as
498     * - server name
499     * - realname (gecos)
500     * output - NONE
501     * side effects - This function is called when a remote client
502     * is introduced by a server.
503     */
504     void
505     register_remote_user(struct Client *client_p, struct Client *source_p,
506 michael 56 const char *username, const char *host, const char *server,
507     const char *realname)
508 adx 30 {
509 michael 56 struct Client *target_p = NULL;
510 adx 30
511     assert(source_p != NULL);
512     assert(source_p->username != username);
513    
514     strlcpy(source_p->host, host, sizeof(source_p->host));
515     strlcpy(source_p->info, realname, sizeof(source_p->info));
516     strlcpy(source_p->username, username, sizeof(source_p->username));
517    
518     /* Increment our total user count here */
519     if (++Count.total > Count.max_tot)
520     Count.max_tot = Count.total;
521    
522     source_p->from->serv->dep_users++;
523    
524     /*
525     * coming from another server, take the servers word for it
526     */
527     source_p->servptr = find_server(server);
528    
529     /* Super GhostDetect:
530     * If we can't find the server the user is supposed to be on,
531     * then simply blow the user away. -Taner
532     */
533     if (source_p->servptr == NULL)
534     {
535     sendto_realops_flags(UMODE_ALL, L_ALL,
536     "No server %s for user %s[%s@%s] from %s",
537     server, source_p->name, source_p->username,
538     source_p->host, source_p->from->name);
539     kill_client(client_p, source_p, "%s (Server doesn't exist)", me.name);
540    
541     /* XXX */
542     SetKilled(source_p);
543     exit_client(source_p, &me, "Ghosted Client");
544     return;
545     }
546    
547     if ((target_p = source_p->servptr) && target_p->from != source_p->from)
548     {
549     sendto_realops_flags(UMODE_DEBUG, L_ALL,
550     "Bad User [%s] :%s USER %s@%s %s, != %s[%s]",
551     client_p->name, source_p->name, source_p->username,
552     source_p->host, source_p->servptr->name,
553     target_p->name, target_p->from->name);
554     kill_client(client_p, source_p,
555     "%s (NICK from wrong direction (%s != %s))",
556     me.name, source_p->servptr->name, target_p->from->name);
557     SetKilled(source_p);
558     exit_client(source_p, &me, "USER server wrong direction");
559     return;
560     }
561    
562     SetClient(source_p);
563     dlinkAdd(source_p, &source_p->lnode, &source_p->servptr->serv->users);
564     add_user_host(source_p->username, source_p->host, 1);
565     SetUserHost(source_p);
566    
567     introduce_client(client_p, source_p);
568     }
569    
570     /* introduce_client()
571     *
572     * inputs - client_p
573     * - source_p
574     * output - NONE
575     * side effects - This common function introduces a client to the rest
576     * of the net, either from a local client connect or
577     * from a remote connect.
578     */
579     static void
580     introduce_client(struct Client *client_p, struct Client *source_p)
581     {
582 michael 56 dlink_node *server_node = NULL;
583 adx 30 static char ubuf[12];
584    
585     if (MyClient(source_p))
586     send_umode(source_p, source_p, 0, SEND_UMODES, ubuf);
587     else
588     send_umode(NULL, source_p, 0, SEND_UMODES, ubuf);
589    
590     if (*ubuf == '\0')
591     {
592     ubuf[0] = '+';
593     ubuf[1] = '\0';
594     }
595    
596     /* arghhh one could try not introducing new nicks to ll leafs
597     * but then you have to introduce them "on the fly" in SJOIN
598     * not fun.
599     * Its not going to cost much more bandwidth to simply let new
600     * nicks just ride on through.
601     */
602    
603     /* We now introduce nicks "on the fly" in SJOIN anyway --
604     * you _need_ to if you aren't going to burst everyone initially.
605     *
606     * Only send to non CAP_LL servers, unless we're a lazylink leaf,
607     * in that case just send it to the uplink.
608     * -davidt
609     * rewritten to cope with SIDs .. eww eww eww --is
610     */
611    
612     /* XXX THESE NEED A PREFIX!?!?!? */
613     if (!ServerInfo.hub && uplink && IsCapable(uplink, CAP_LL) &&
614     client_p != uplink)
615     {
616     if (IsCapable(uplink, CAP_TS6) && HasID(source_p))
617     {
618     sendto_one(uplink, ":%s UID %s %d %lu %s %s %s %s %s :%s",
619     source_p->servptr->id,
620     source_p->name, source_p->hopcount+1,
621 adx 386 (unsigned long)source_p->tsinfo,
622 adx 30 ubuf, source_p->username, source_p->host,
623 adx 386 (MyClient(source_p) && IsIPSpoof(source_p)) ?
624     "0" : source_p->sockhost, source_p->id, source_p->info);
625 adx 30 }
626     else
627     {
628     sendto_one(uplink, "NICK %s %d %lu %s %s %s %s :%s",
629     source_p->name, source_p->hopcount+1,
630 adx 386 (unsigned long)source_p->tsinfo,
631 adx 30 ubuf, source_p->username, source_p->host,
632 adx 386 source_p->servptr->name, source_p->info);
633 adx 30 }
634     }
635     else
636     {
637     DLINK_FOREACH(server_node, serv_list.head)
638     {
639     struct Client *server = server_node->data;
640    
641     if (IsCapable(server, CAP_LL) || server == client_p)
642     continue;
643    
644     if (IsCapable(server, CAP_TS6) && HasID(source_p))
645     sendto_one(server, ":%s UID %s %d %lu %s %s %s %s %s :%s",
646     source_p->servptr->id,
647     source_p->name, source_p->hopcount+1,
648 adx 386 (unsigned long)source_p->tsinfo,
649 adx 30 ubuf, source_p->username, source_p->host,
650 adx 386 (MyClient(source_p) && IsIPSpoof(source_p)) ?
651     "0" : source_p->sockhost, source_p->id, source_p->info);
652 adx 30 else
653     sendto_one(server, "NICK %s %d %lu %s %s %s %s :%s",
654     source_p->name, source_p->hopcount+1,
655 adx 386 (unsigned long)source_p->tsinfo,
656 adx 30 ubuf, source_p->username, source_p->host,
657 adx 386 source_p->servptr->name, source_p->info);
658 adx 30 }
659     }
660     }
661    
662     /* valid_hostname()
663     *
664     * Inputs - pointer to hostname
665     * Output - 1 if valid, 0 if not
666     * Side effects - check hostname for validity
667     *
668     * NOTE: this doesn't allow a hostname to begin with a dot and
669     * will not allow more dots than chars.
670     */
671     int
672     valid_hostname(const char *hostname)
673     {
674     const char *p = hostname;
675    
676     assert(p != NULL);
677    
678 michael 56 if ('.' == *p || ':' == *p)
679     return 0;
680 adx 30
681     while (*p)
682     {
683     if (!IsHostChar(*p))
684 michael 56 return 0;
685 adx 30 p++;
686     }
687    
688 michael 56 return 1;
689 adx 30 }
690    
691     /* valid_username()
692     *
693     * Inputs - pointer to user
694     * Output - 1 if valid, 0 if not
695     * Side effects - check username for validity
696     *
697     * Absolutely always reject any '*' '!' '?' '@' in an user name
698     * reject any odd control characters names.
699     * Allow '.' in username to allow for "first.last"
700     * style of username
701     */
702     int
703     valid_username(const char *username)
704     {
705     int dots = 0;
706     const char *p = username;
707    
708     assert(p != NULL);
709    
710     if ('~' == *p)
711     ++p;
712    
713     /* reject usernames that don't start with an alphanum
714     * i.e. reject jokers who have '-@somehost' or '.@somehost'
715     * or "-hi-@somehost", "h-----@somehost" would still be accepted.
716     */
717     if (!IsAlNum(*p))
718 michael 56 return 0;
719 adx 30
720     while (*++p)
721     {
722     if ((*p == '.') && ConfigFileEntry.dots_in_ident)
723     {
724     dots++;
725    
726     if (dots > ConfigFileEntry.dots_in_ident)
727 michael 56 return 0;
728 adx 30 if (!IsUserChar(p[1]))
729 michael 56 return 0;
730 adx 30 }
731     else if (!IsUserChar(*p))
732 michael 56 return 0;
733 adx 30 }
734    
735 michael 56 return 1;
736 adx 30 }
737    
738     /* report_and_set_user_flags()
739     *
740     * inputs - pointer to source_p
741     * - pointer to aconf for this user
742     * output - NONE
743     * side effects - Report to user any special flags
744     * they are getting, and set them.
745     */
746     static void
747     report_and_set_user_flags(struct Client *source_p, const struct AccessItem *aconf)
748     {
749     /* If this user is being spoofed, tell them so */
750     if (IsConfDoSpoofIp(aconf))
751     {
752     sendto_one(source_p,
753     ":%s NOTICE %s :*** Spoofing your IP. congrats.",
754     me.name, source_p->name);
755     }
756    
757     /* If this user is in the exception class, Set it "E lined" */
758     if (IsConfExemptKline(aconf))
759     {
760     SetExemptKline(source_p);
761     sendto_one(source_p,
762     ":%s NOTICE %s :*** You are exempt from K/D/G lines. congrats.",
763     me.name, source_p->name);
764     }
765    
766     /* The else here is to make sure that G line exempt users
767     * do not get noticed twice.
768     */
769     else if (IsConfExemptGline(aconf))
770     {
771     SetExemptGline(source_p);
772     sendto_one(source_p, ":%s NOTICE %s :*** You are exempt from G lines.",
773     me.name, source_p->name);
774     }
775    
776     if (IsConfExemptResv(aconf))
777     {
778     SetExemptResv(source_p);
779     sendto_one(source_p, ":%s NOTICE %s :*** You are exempt from resvs.",
780     me.name, source_p->name);
781     }
782    
783     /* If this user is exempt from user limits set it "F lined" */
784     if (IsConfExemptLimits(aconf))
785     {
786     SetExemptLimits(source_p);
787     sendto_one(source_p,
788     ":%s NOTICE %s :*** You are exempt from user limits. congrats.",
789     me.name,source_p->name);
790     }
791    
792     /* If this user is exempt from idle time outs */
793     if (IsConfIdlelined(aconf))
794     {
795     SetIdlelined(source_p);
796     sendto_one(source_p,
797     ":%s NOTICE %s :*** You are exempt from idle limits. congrats.",
798     me.name, source_p->name);
799     }
800    
801     if (IsConfCanFlood(aconf))
802     {
803     SetCanFlood(source_p);
804     sendto_one(source_p, ":%s NOTICE %s :*** You are exempt from flood "
805     "protection, aren't you fearsome.",
806     me.name, source_p->name);
807     }
808     }
809    
810     /* do_local_user()
811     *
812     * inputs -
813     * output - NONE
814     * side effects -
815     */
816     void
817     do_local_user(const char *nick, struct Client *client_p, struct Client *source_p,
818     const char *username, const char *host, const char *server,
819     const char *realname)
820     {
821     assert(source_p != NULL);
822     assert(source_p->username != username);
823    
824     if (source_p == NULL)
825     return;
826    
827     if (!IsUnknown(source_p))
828     {
829     sendto_one(source_p, form_str(ERR_ALREADYREGISTRED),
830     me.name, nick);
831     return;
832     }
833    
834 michael 503 source_p->localClient->registration &= ~REG_NEED_USER;
835 adx 30
836     /*
837     * don't take the clients word for it, ever
838     */
839     source_p->servptr = &me;
840    
841     strlcpy(source_p->info, realname, sizeof(source_p->info));
842    
843     if (!IsGotId(source_p))
844     {
845     /* save the username in the client
846     * If you move this you'll break ping cookies..you've been warned
847     */
848     strlcpy(source_p->username, username, sizeof(source_p->username));
849     }
850    
851 michael 503 if (!source_p->localClient->registration)
852 adx 30 /* NICK already received, now I have USER... */
853     register_local_user(client_p, source_p, source_p->name, username);
854     }
855    
856     /* change_simple_umode()
857     *
858     * this callback can be hooked to allow special handling of
859     * certain usermodes
860     */
861     static void *
862     change_simple_umode(va_list args)
863     {
864     struct Client *source_p;
865     int what;
866     unsigned int flag;
867    
868     va_arg(args, struct Client *);
869     source_p = va_arg(args, struct Client *);
870     what = va_arg(args, int);
871     flag = va_arg(args, unsigned int);
872    
873     if (what == MODE_ADD)
874     source_p->umodes |= flag;
875     else
876     source_p->umodes &= ~flag;
877    
878     return NULL;
879     }
880    
881     /* set_user_mode()
882     *
883     * added 15/10/91 By Darren Reed.
884     * parv[0] - sender
885     * parv[1] - username to change mode for
886     * parv[2] - modes to change
887     */
888     void
889     set_user_mode(struct Client *client_p, struct Client *source_p,
890     int parc, char *parv[])
891     {
892     unsigned int flag, setflags;
893     char **p, *m, buf[IRCD_BUFSIZE];
894     struct Client *target_p;
895     int what = MODE_ADD, badflag = 0, i;
896 michael 56
897     assert(!(parc < 2));
898    
899 adx 30 if ((target_p = find_person(client_p, parv[1])) == NULL)
900     {
901     if (MyConnect(source_p))
902     sendto_one(source_p, form_str(ERR_NOSUCHCHANNEL),
903     me.name, source_p->name, parv[1]);
904     return;
905     }
906    
907     if (IsServer(source_p))
908     {
909     sendto_realops_flags(UMODE_ALL, L_ADMIN, "*** Mode for User %s from %s",
910     parv[1], source_p->name);
911     return;
912     }
913    
914     if (source_p != target_p || target_p->from != source_p->from)
915     {
916     sendto_one(source_p, form_str(ERR_USERSDONTMATCH),
917     me.name, source_p->name);
918     return;
919     }
920    
921     if (parc < 3)
922     {
923     m = buf;
924     *m++ = '+';
925    
926     for (i = 0; i < 128; i++)
927     if (source_p->umodes & user_modes[i])
928     *m++ = (char)i;
929     *m = '\0';
930    
931     sendto_one(source_p, form_str(RPL_UMODEIS),
932     me.name, source_p->name, buf);
933     return;
934     }
935    
936     execute_callback(entering_umode_cb, client_p, source_p);
937    
938     /* find flags already set for user */
939     setflags = source_p->umodes;
940    
941     /* parse mode change string(s) */
942     for (p = &parv[2]; p && *p; p++)
943     {
944     for (m = *p; *m; m++)
945     {
946     switch (*m)
947     {
948     case '+':
949     what = MODE_ADD;
950     break;
951     case '-':
952     what = MODE_DEL;
953     break;
954     case 'o':
955     if (what == MODE_ADD)
956     {
957     if (IsServer(client_p) && !IsOper(source_p))
958     {
959     ++Count.oper;
960     SetOper(source_p);
961     }
962     }
963     else
964     {
965     /* Only decrement the oper counts if an oper to begin with
966     * found by Pat Szuta, Perly , perly@xnet.com
967     */
968     if (!IsOper(source_p))
969     break;
970    
971     ClearOper(source_p);
972     source_p->umodes &= ~ConfigFileEntry.oper_only_umodes;
973     Count.oper--;
974    
975     if (MyConnect(source_p))
976     {
977     dlink_node *dm;
978    
979     detach_conf(source_p, OPER_TYPE);
980     ClearOperFlags(source_p);
981    
982     if ((dm = dlinkFindDelete(&oper_list, source_p)) != NULL)
983     free_dlink_node(dm);
984     }
985     }
986    
987     break;
988    
989     /* we may not get these,
990     * but they shouldnt be in default
991     */
992     case ' ' :
993     case '\n':
994     case '\r':
995     case '\t':
996     break;
997    
998     default:
999     if ((flag = user_modes[(unsigned char)*m]))
1000     {
1001     if (MyConnect(source_p) && !IsOper(source_p) &&
1002     (ConfigFileEntry.oper_only_umodes & flag))
1003     {
1004     badflag = 1;
1005     }
1006     else
1007 michael 56 execute_callback(umode_cb, client_p, source_p, what, flag);
1008 adx 30 }
1009     else
1010     {
1011     if (MyConnect(source_p))
1012     badflag = 1;
1013     }
1014    
1015     break;
1016     }
1017     }
1018     }
1019    
1020     if (badflag)
1021     sendto_one(source_p, form_str(ERR_UMODEUNKNOWNFLAG),
1022     me.name, source_p->name);
1023    
1024     if ((source_p->umodes & UMODE_NCHANGE) && !IsOperN(source_p))
1025     {
1026     sendto_one(source_p, ":%s NOTICE %s :*** You have no admin flag;",
1027     me.name, source_p->name);
1028     source_p->umodes &= ~UMODE_NCHANGE; /* only tcm's really need this */
1029     }
1030    
1031     if (MyConnect(source_p) && (source_p->umodes & UMODE_ADMIN) &&
1032     !IsOperAdmin(source_p) && !IsOperHiddenAdmin(source_p))
1033     {
1034     sendto_one(source_p, ":%s NOTICE %s :*** You have no admin flag;",
1035     me.name, source_p->name);
1036     source_p->umodes &= ~UMODE_ADMIN;
1037     }
1038    
1039     if (!(setflags & UMODE_INVISIBLE) && IsInvisible(source_p))
1040     ++Count.invisi;
1041     if ((setflags & UMODE_INVISIBLE) && !IsInvisible(source_p))
1042     --Count.invisi;
1043    
1044 michael 56 /*
1045     * compare new flags with old flags and send string which
1046 adx 30 * will cause servers to update correctly.
1047     */
1048     send_umode_out(client_p, source_p, setflags);
1049     }
1050    
1051     /* send_umode()
1052     * send the MODE string for user (user) to connection client_p
1053     * -avalon
1054     */
1055     void
1056     send_umode(struct Client *client_p, struct Client *source_p,
1057     unsigned int old, unsigned int sendmask, char *umode_buf)
1058     {
1059     int what = 0;
1060     unsigned int i;
1061     unsigned int flag;
1062     char *m = umode_buf;
1063    
1064 michael 56 /*
1065     * build a string in umode_buf to represent the change in the user's
1066 adx 30 * mode between the new (source_p->umodes) and 'old'.
1067     */
1068     for (i = 0; i < 128; i++)
1069     {
1070     flag = user_modes[i];
1071     if (!flag)
1072     continue;
1073    
1074     if (MyClient(source_p) && !(flag & sendmask))
1075     continue;
1076    
1077     if ((flag & old) && !(source_p->umodes & flag))
1078     {
1079     if (what == MODE_DEL)
1080     *m++ = (char)i;
1081     else
1082     {
1083     what = MODE_DEL;
1084     *m++ = '-';
1085     *m++ = (char)i;
1086     }
1087     }
1088     else if (!(flag & old) && (source_p->umodes & flag))
1089     {
1090     if (what == MODE_ADD)
1091     *m++ = (char)i;
1092     else
1093     {
1094     what = MODE_ADD;
1095     *m++ = '+';
1096     *m++ = (char)i;
1097     }
1098     }
1099     }
1100    
1101     *m = '\0';
1102    
1103     if (*umode_buf && client_p)
1104     sendto_one(client_p, ":%s MODE %s :%s",
1105     source_p->name, source_p->name, umode_buf);
1106     }
1107    
1108     /* send_umode_out()
1109     *
1110     * inputs -
1111     * output - NONE
1112     * side effects - Only send ubuf out to servers that know about this client
1113     */
1114     void
1115     send_umode_out(struct Client *client_p, struct Client *source_p,
1116     unsigned int old)
1117     {
1118     char buf[IRCD_BUFSIZE];
1119     dlink_node *ptr = NULL;
1120    
1121     send_umode(NULL, source_p, old, IsOperHiddenAdmin(source_p) ?
1122     SEND_UMODES & ~UMODE_ADMIN : SEND_UMODES, buf);
1123    
1124     if (*buf)
1125     {
1126     DLINK_FOREACH(ptr, serv_list.head)
1127     {
1128     struct Client *target_p = ptr->data;
1129    
1130     if ((target_p != client_p) && (target_p != source_p))
1131     {
1132     if ((!(ServerInfo.hub && IsCapable(target_p, CAP_LL))) ||
1133     (target_p->localClient->serverMask &
1134     source_p->lazyLinkClientExists))
1135     sendto_one(target_p, ":%s MODE %s :%s",
1136     ID_or_name(source_p, target_p),
1137     ID_or_name(source_p, target_p), buf);
1138     }
1139     }
1140     }
1141    
1142     if (client_p && MyClient(client_p))
1143     send_umode(client_p, source_p, old, 0xffffffff, buf);
1144     }
1145    
1146     /* user_welcome()
1147     *
1148     * inputs - client pointer to client to welcome
1149     * output - NONE
1150     * side effects -
1151     */
1152     static void
1153     user_welcome(struct Client *source_p)
1154     {
1155     #if defined(__TIME__) && defined(__DATE__)
1156     static const char built_date[] = __DATE__ " at " __TIME__;
1157     #else
1158     static const char built_date[] = "unknown";
1159     #endif
1160    
1161     #ifdef HAVE_LIBCRYPTO
1162     if (source_p->localClient->fd.ssl != NULL)
1163     sendto_one(source_p, ":%s NOTICE %s :*** Connected securely via %s",
1164     me.name, source_p->name,
1165     ssl_get_cipher(source_p->localClient->fd.ssl));
1166     #endif
1167    
1168     sendto_one(source_p, form_str(RPL_WELCOME), me.name, source_p->name,
1169     ServerInfo.network_name, source_p->name);
1170     sendto_one(source_p, form_str(RPL_YOURHOST), me.name, source_p->name,
1171 michael 56 get_listener_name(source_p->localClient->listener), ircd_version);
1172 adx 30 sendto_one(source_p, form_str(RPL_CREATED),
1173 michael 56 me.name, source_p->name, built_date);
1174 adx 30 sendto_one(source_p, form_str(RPL_MYINFO),
1175     me.name, source_p->name, me.name, ircd_version, umode_buffer);
1176     show_isupport(source_p);
1177    
1178     if (source_p->id[0] != '\0')
1179     sendto_one(source_p, form_str(RPL_YOURID), me.name,
1180     source_p->name, source_p->id);
1181    
1182     show_lusers(source_p);
1183    
1184     if (ConfigFileEntry.short_motd)
1185     {
1186     sendto_one(source_p, "NOTICE %s :*** Notice -- motd was last changed at %s",
1187     source_p->name, ConfigFileEntry.motd.lastChangedDate);
1188     sendto_one(source_p,
1189     "NOTICE %s :*** Notice -- Please read the motd if you haven't "
1190     "read it", source_p->name);
1191     sendto_one(source_p, form_str(RPL_MOTDSTART),
1192     me.name, source_p->name, me.name);
1193     sendto_one(source_p, form_str(RPL_MOTD),
1194     me.name, source_p->name,
1195     "*** This is the short motd ***");
1196     sendto_one(source_p, form_str(RPL_ENDOFMOTD),
1197     me.name, source_p->name);
1198     }
1199     else
1200     send_message_file(source_p, &ConfigFileEntry.motd);
1201     }
1202    
1203     /* check_xline()
1204     *
1205     * inputs - pointer to client to test
1206     * outupt - 1 if exiting 0 if ok
1207     * side effects -
1208     */
1209     static int
1210     check_xline(struct Client *source_p)
1211     {
1212     struct ConfItem *conf;
1213     struct MatchItem *xconf;
1214     const char *reason;
1215    
1216     if ((conf = find_matching_name_conf(XLINE_TYPE, source_p->info,
1217     NULL, NULL, 0)) != NULL)
1218     {
1219     xconf = map_to_conf(conf);
1220     xconf->count++;
1221    
1222     if (xconf->reason != NULL)
1223     reason = xconf->reason;
1224     else
1225     reason = "No Reason";
1226    
1227     sendto_realops_flags(UMODE_REJ, L_ALL,
1228 michael 56 "X-line Rejecting [%s] [%s], user %s [%s]",
1229     source_p->info, reason,
1230     get_client_name(source_p, HIDE_IP),
1231     source_p->sockhost);
1232 adx 30
1233     ServerStats->is_ref++;
1234 michael 56 if (REJECT_HOLD_TIME > 0)
1235 adx 30 {
1236     sendto_one(source_p, ":%s NOTICE %s :Bad user info",
1237 michael 56 me.name, source_p->name);
1238 adx 30 source_p->localClient->reject_delay = CurrentTime + REJECT_HOLD_TIME;
1239     SetCaptured(source_p);
1240     }
1241     else
1242     exit_client(source_p, &me, "Bad user info");
1243     return 1;
1244     }
1245    
1246     return 0;
1247     }
1248    
1249     static int
1250     check_regexp_xline(struct Client *source_p)
1251     {
1252     struct ConfItem *conf = NULL;
1253     const char *reason = NULL;
1254    
1255     if ((conf = find_matching_name_conf(RXLINE_TYPE, source_p->info, NULL, NULL, 0)))
1256     {
1257     struct MatchItem *reg = map_to_conf(conf);
1258    
1259     ++reg->count;
1260    
1261     if (reg->reason != NULL)
1262     reason = reg->reason;
1263     else
1264     reason = "No Reason";
1265    
1266     sendto_realops_flags(UMODE_REJ, L_ALL,
1267     "X-line (REGEX) Rejecting [%s] [%s], user %s [%s]",
1268     source_p->info, reason,
1269     get_client_name(source_p, HIDE_IP),
1270     source_p->sockhost);
1271    
1272     ServerStats->is_ref++;
1273     exit_client(source_p, &me, "Bad user info");
1274     return 1;
1275     }
1276    
1277     return 0;
1278     }
1279    
1280     /* oper_up()
1281     *
1282     * inputs - pointer to given client to oper
1283     * output - NONE
1284     * side effects - Blindly opers up given source_p, using aconf info
1285     * all checks on passwords have already been done.
1286     * This could also be used by rsa oper routines.
1287     */
1288     void
1289     oper_up(struct Client *source_p)
1290     {
1291     unsigned int old = source_p->umodes;
1292     const char *operprivs = "";
1293 michael 56 const struct AccessItem *oconf = NULL;
1294 adx 30
1295 michael 56 assert(source_p->localClient->confs.head);
1296     oconf = map_to_conf((source_p->localClient->confs.head)->data);
1297    
1298     ++Count.oper;
1299 adx 30 SetOper(source_p);
1300    
1301 michael 56 if (oconf->modes)
1302     source_p->umodes |= oconf->modes;
1303     else if (ConfigFileEntry.oper_umodes)
1304 adx 30 source_p->umodes |= ConfigFileEntry.oper_umodes;
1305     else
1306     source_p->umodes |= (UMODE_SERVNOTICE|UMODE_OPERWALL|
1307 michael 56 UMODE_WALLOP|UMODE_LOCOPS);
1308 adx 30
1309     assert(dlinkFind(&oper_list, source_p) == NULL);
1310     dlinkAdd(source_p, make_dlink_node(), &oper_list);
1311    
1312     operprivs = oper_privs_as_string(oconf->port);
1313    
1314     SetOFlag(source_p, oconf->port);
1315    
1316     if (IsOperAdmin(source_p) || IsOperHiddenAdmin(source_p))
1317     source_p->umodes |= UMODE_ADMIN;
1318     if (!IsOperN(source_p))
1319     source_p->umodes &= ~UMODE_NCHANGE;
1320    
1321     sendto_realops_flags(UMODE_ALL, L_ALL, "%s (%s@%s) is now an operator",
1322     source_p->name, source_p->username, source_p->host);
1323     send_umode_out(source_p, source_p, old);
1324     sendto_one(source_p, form_str(RPL_YOUREOPER), me.name, source_p->name);
1325     sendto_one(source_p, ":%s NOTICE %s :*** Oper privs are %s",
1326     me.name, source_p->name, operprivs);
1327     send_message_file(source_p, &ConfigFileEntry.opermotd);
1328     }
1329    
1330     /*
1331     * Quick and dirty UID code for new proposed SID on EFnet
1332     *
1333     */
1334    
1335     static char new_uid[TOTALSIDUID+1]; /* allow for \0 */
1336     static void add_one_to_uid(int i);
1337    
1338     /*
1339     * init_uid()
1340     *
1341     * inputs - NONE
1342     * output - NONE
1343     * side effects - new_uid is filled in with server id portion (sid)
1344     * (first 3 bytes) or defaulted to 'A'.
1345     * Rest is filled in with 'A'
1346     */
1347     void
1348     init_uid(void)
1349     {
1350     int i;
1351    
1352     memset(new_uid, 0, sizeof(new_uid));
1353    
1354     if (ServerInfo.sid != NULL)
1355     {
1356     memcpy(new_uid, ServerInfo.sid, IRCD_MIN(strlen(ServerInfo.sid),
1357 michael 56 IRC_MAXSID));
1358 adx 30 memcpy(&me.id, ServerInfo.sid, IRCD_MIN(strlen(ServerInfo.sid),
1359 michael 56 IRC_MAXSID));
1360 adx 30 hash_add_id(&me);
1361     }
1362    
1363     for (i = 0; i < IRC_MAXSID; i++)
1364     if (new_uid[i] == '\0')
1365     new_uid[i] = 'A';
1366    
1367     /* XXX if IRC_MAXUID != 6, this will have to be rewritten */
1368     /* Yes nenolod, I have known it was off by one ever since I wrote it
1369     * But *JUST* for you, though, it really doesn't look as *pretty*
1370     * -Dianora
1371     */
1372     memcpy(new_uid+IRC_MAXSID, "AAAAA@", IRC_MAXUID);
1373    
1374     entering_umode_cb = register_callback("entering_umode", NULL);
1375     umode_cb = register_callback("changing_umode", change_simple_umode);
1376     uid_get_cb = register_callback("uid_get", uid_get);
1377     }
1378    
1379     /*
1380     * uid_get
1381     *
1382     * inputs - struct Client *
1383     * output - new UID is returned to caller
1384     * side effects - new_uid is incremented by one.
1385     */
1386     static void *
1387     uid_get(va_list args)
1388     {
1389 michael 56 add_one_to_uid(TOTALSIDUID-1); /* index from 0 */
1390 adx 30 return ((void *) new_uid);
1391     }
1392    
1393     /*
1394     * add_one_to_uid
1395     *
1396     * inputs - index number into new_uid
1397     * output - NONE
1398     * side effects - new_uid is incremented by one
1399     * note this is a recursive function
1400     */
1401     static void
1402     add_one_to_uid(int i)
1403     {
1404 michael 56 if (i != IRC_MAXSID) /* Not reached server SID portion yet? */
1405 adx 30 {
1406     if (new_uid[i] == 'Z')
1407     new_uid[i] = '0';
1408     else if (new_uid[i] == '9')
1409     {
1410     new_uid[i] = 'A';
1411     add_one_to_uid(i-1);
1412     }
1413     else new_uid[i] = new_uid[i] + 1;
1414     }
1415     else
1416     {
1417     /* XXX if IRC_MAXUID != 6, this will have to be rewritten */
1418     if (new_uid[i] == 'Z')
1419     memcpy(new_uid+IRC_MAXSID, "AAAAAA", IRC_MAXUID);
1420     else
1421     new_uid[i] = new_uid[i] + 1;
1422     }
1423     }
1424    
1425     /*
1426     * init_isupport()
1427     *
1428     * input - NONE
1429     * output - NONE
1430     * side effects - Must be called before isupport is enabled
1431     */
1432     void
1433     init_isupport(void)
1434     {
1435     isupportFile = init_MessageLine();
1436    
1437     add_isupport("CALLERID", NULL, -1);
1438     add_isupport("CASEMAPPING", CASEMAP, -1);
1439     add_isupport("KICKLEN", NULL, KICKLEN);
1440     add_isupport("MODES", NULL, MAXMODEPARAMS);
1441     add_isupport("NICKLEN", NULL, NICKLEN-1);
1442     #ifdef HALFOPS
1443     add_isupport("PREFIX", "(ohv)@%+", -1);
1444     add_isupport("STATUSMSG", "@%+", -1);
1445     #else
1446     add_isupport("PREFIX", "(ov)@+", -1);
1447     add_isupport("STATUSMSG", "@+", -1);
1448     #endif
1449     add_isupport("TOPICLEN", NULL, TOPICLEN);
1450     }
1451    
1452     /*
1453     * add_isupport()
1454     *
1455     * input - name of supported function
1456     * - options if any
1457     * - number if any
1458     * output - NONE
1459     * side effects - Each supported item must call this when activated
1460     */
1461     void
1462     add_isupport(const char *name, const char *options, int n)
1463     {
1464     dlink_node *ptr;
1465     struct Isupport *support;
1466    
1467     DLINK_FOREACH(ptr, support_list.head)
1468     {
1469     support = ptr->data;
1470     if (irccmp(support->name, name) == 0)
1471     {
1472     MyFree(support->name);
1473     MyFree(support->options);
1474     break;
1475     }
1476     }
1477    
1478     if (ptr == NULL)
1479     {
1480     support = MyMalloc(sizeof(*support));
1481     dlinkAddTail(support, &support->node, &support_list);
1482     }
1483    
1484     DupString(support->name, name);
1485     if (options != NULL)
1486     DupString(support->options, options);
1487     support->number = n;
1488    
1489     rebuild_isupport_message_line();
1490     }
1491    
1492     /*
1493     * delete_isupport()
1494     *
1495     * input - name of supported function
1496     * output - NONE
1497     * side effects - Each supported item must call this when deactivated
1498     */
1499     void
1500     delete_isupport(const char *name)
1501     {
1502     dlink_node *ptr;
1503     struct Isupport *support;
1504    
1505     DLINK_FOREACH(ptr, support_list.head)
1506     {
1507     support = ptr->data;
1508     if (irccmp(support->name, name) == 0)
1509     {
1510     dlinkDelete(ptr, &support_list);
1511     MyFree(support->name);
1512     MyFree(support->options);
1513     MyFree(support);
1514     break;
1515     }
1516     }
1517    
1518     rebuild_isupport_message_line();
1519     }
1520    
1521     /*
1522     * rebuild_isupport_message_line
1523     *
1524     * input - NONE
1525     * output - NONE
1526     * side effects - Destroy the isupport MessageFile lines, and rebuild.
1527     */
1528     void
1529     rebuild_isupport_message_line(void)
1530     {
1531     char isupportbuffer[IRCD_BUFSIZE];
1532     char *p = isupportbuffer;
1533     dlink_node *ptr = NULL;
1534     int n = 0;
1535     int tokens = 0;
1536     size_t len = 0;
1537     size_t reserve = strlen(me.name) + HOSTLEN + strlen(form_str(RPL_ISUPPORT));
1538    
1539     destroy_MessageLine(isupportFile);
1540    
1541     DLINK_FOREACH(ptr, support_list.head)
1542     {
1543     struct Isupport *support = ptr->data;
1544    
1545     p += (n = ircsprintf(p, "%s", support->name));
1546     len += n;
1547    
1548     if (support->options != NULL)
1549     {
1550     p += (n = ircsprintf(p, "=%s", support->options));
1551     len += n;
1552     }
1553    
1554     if (support->number > 0)
1555     {
1556     p += (n = ircsprintf(p, "=%d", support->number));
1557     len += n;
1558     }
1559    
1560     *p++ = ' ';
1561     len++;
1562     *p = '\0';
1563    
1564     if (++tokens == (MAXPARA-2) || len >= (sizeof(isupportbuffer)-reserve))
1565     { /* arbritrary for now */
1566     if (*--p == ' ')
1567 michael 56 *p = '\0';
1568 adx 30
1569     addto_MessageLine(isupportFile, isupportbuffer);
1570     p = isupportbuffer;
1571     len = 0;
1572     n = tokens = 0;
1573     }
1574     }
1575    
1576     if (len != 0)
1577     {
1578     if (*--p == ' ')
1579     *p = '\0';
1580     addto_MessageLine(isupportFile, isupportbuffer);
1581     }
1582     }

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