2 * ngIRCd -- The Next Generation IRC Daemon
3 * Copyright (c)2001-2010 Alexander Barton (alex@barton.de)
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 * Please read the file COPYING, README and AUTHORS for more information.
40 #include "conn-func.h"
42 #include "irc-write.h"
48 #define GETID_LEN (CLIENT_NICK_LEN-1) + 1 + (CLIENT_USER_LEN-1) + 1 + (CLIENT_HOST_LEN-1) + 1
50 static CLIENT *This_Server, *My_Clients;
52 static WHOWAS My_Whowas[MAX_WHOWAS];
53 static int Last_Whowas = -1;
54 static long Max_Users, My_Max_Users;
57 static unsigned long Count PARAMS(( CLIENT_TYPE Type ));
58 static unsigned long MyCount PARAMS(( CLIENT_TYPE Type ));
60 static CLIENT *New_Client_Struct PARAMS(( void ));
61 static void Generate_MyToken PARAMS(( CLIENT *Client ));
62 static void Adjust_Counters PARAMS(( CLIENT *Client ));
64 static CLIENT *Init_New_Client PARAMS((CONN_ID Idx, CLIENT *Introducer,
65 CLIENT *TopServer, int Type, const char *ID,
66 const char *User, const char *Hostname, const char *Info,
67 int Hops, int Token, const char *Modes,
70 static void Destroy_UserOrService PARAMS((CLIENT *Client,const char *Txt, const char *FwdMsg,
73 static void cb_introduceClient PARAMS((CLIENT *Client, CLIENT *Prefix,
81 This_Server = New_Client_Struct( );
84 Log( LOG_EMERG, "Can't allocate client structure for server! Going down." );
85 Log( LOG_ALERT, "%s exiting due to fatal errors!", PACKAGE_NAME );
89 /* Client-Struktur dieses Servers */
90 This_Server->next = NULL;
91 This_Server->type = CLIENT_SERVER;
92 This_Server->conn_id = NONE;
93 This_Server->introducer = This_Server;
94 This_Server->mytoken = 1;
95 This_Server->hops = 0;
97 gethostname( This_Server->host, CLIENT_HOST_LEN );
99 h = gethostbyname( This_Server->host );
100 if (h) strlcpy(This_Server->host, h->h_name, sizeof(This_Server->host));
102 Client_SetID( This_Server, Conf_ServerName );
103 Client_SetInfo( This_Server, Conf_ServerInfo );
105 My_Clients = This_Server;
107 memset( &My_Whowas, 0, sizeof( My_Whowas ));
117 if( NGIRCd_SignalRestart ) Client_Destroy( This_Server, "Server going down (restarting).", NULL, false );
118 else Client_Destroy( This_Server, "Server going down.", NULL, false );
125 next = (CLIENT *)c->next;
129 if( cnt ) Log( LOG_INFO, "Freed %d client structure%s.", cnt, cnt == 1 ? "" : "s" );
134 Client_ThisServer( void )
137 } /* Client_ThisServer */
141 * Initialize new local client; wrapper function for Init_New_Client().
142 * @return New CLIENT structure.
145 Client_NewLocal(CONN_ID Idx, const char *Hostname, int Type, bool Idented)
147 return Init_New_Client(Idx, This_Server, NULL, Type, NULL, NULL,
148 Hostname, NULL, 0, 0, NULL, Idented);
149 } /* Client_NewLocal */
153 * Initialize new remote server; wrapper function for Init_New_Client().
154 * @return New CLIENT structure.
157 Client_NewRemoteServer(CLIENT *Introducer, const char *Hostname, CLIENT *TopServer,
158 int Hops, int Token, const char *Info, bool Idented)
160 return Init_New_Client(NONE, Introducer, TopServer, CLIENT_SERVER,
161 Hostname, NULL, Hostname, Info, Hops, Token, NULL, Idented);
162 } /* Client_NewRemoteServer */
166 * Initialize new remote client; wrapper function for Init_New_Client().
167 * @return New CLIENT structure.
170 Client_NewRemoteUser(CLIENT *Introducer, const char *Nick, int Hops, const char *User,
171 const char *Hostname, int Token, const char *Modes, const char *Info, bool Idented)
173 return Init_New_Client(NONE, Introducer, NULL, CLIENT_USER, Nick,
174 User, Hostname, Info, Hops, Token, Modes, Idented);
175 } /* Client_NewRemoteUser */
179 * Initialize new client and set up the given parameters like client type,
180 * user name, host name, introducing server etc. ...
181 * @return New CLIENT structure.
184 Init_New_Client(CONN_ID Idx, CLIENT *Introducer, CLIENT *TopServer,
185 int Type, const char *ID, const char *User, const char *Hostname,
186 const char *Info, int Hops, int Token, const char *Modes, bool Idented)
191 assert(Introducer != NULL);
193 client = New_Client_Struct();
197 client->starttime = time(NULL);
198 client->conn_id = Idx;
199 client->introducer = Introducer;
200 client->topserver = TopServer;
203 Client_SetID(client, ID);
205 Client_SetUser(client, User, Idented);
206 Client_SetOrigUser(client, User);
209 Client_SetHostname(client, Hostname);
211 Client_SetInfo(client, Info);
213 client->token = Token;
215 Client_SetModes(client, Modes);
216 if (Type == CLIENT_SERVER)
217 Generate_MyToken(client);
219 if (strchr(client->modes, 'a'))
220 strlcpy(client->away, DEFAULT_AWAY_MSG, sizeof(client->away));
222 client->next = (POINTER *)My_Clients;
225 Adjust_Counters(client);
228 } /* Init_New_Client */
232 Client_Destroy( CLIENT *Client, const char *LogMsg, const char *FwdMsg, bool SendQuit )
234 /* remove a client */
240 assert( Client != NULL );
242 if( LogMsg ) txt = LogMsg;
244 if( ! txt ) txt = "Reason unknown.";
246 /* netsplit message */
247 if( Client->type == CLIENT_SERVER ) {
248 strlcpy(msg, This_Server->id, sizeof (msg));
249 strlcat(msg, " ", sizeof (msg));
250 strlcat(msg, Client->id, sizeof (msg));
257 if(( Client->type == CLIENT_SERVER ) && ( c->introducer == Client ) && ( c != Client ))
260 * The client that is about to be removed is a server,
261 * the client we are checking right now is a child of that
262 * server and thus has to be removed, too.
264 * Call Client_Destroy() recursively with the server as the
265 * new "object to be removed". This starts the cycle again, until
266 * all servers that are linked via the original server have been
269 Client_Destroy( c, NULL, msg, false );
276 /* found the client: remove it */
277 if( last ) last->next = c->next;
278 else My_Clients = (CLIENT *)c->next;
280 if(c->type == CLIENT_USER || c->type == CLIENT_SERVICE)
281 Destroy_UserOrService(c, txt, FwdMsg, SendQuit);
282 else if( c->type == CLIENT_SERVER )
284 if( c != This_Server )
286 if( c->conn_id != NONE ) Log( LOG_NOTICE|LOG_snotice, "Server \"%s\" unregistered (connection %d): %s", c->id, c->conn_id, txt );
287 else Log( LOG_NOTICE|LOG_snotice, "Server \"%s\" unregistered: %s", c->id, txt );
290 /* inform other servers */
291 if( ! NGIRCd_SignalQuit )
293 if( FwdMsg ) IRC_WriteStrServersPrefix( Client_NextHop( c ), c, "SQUIT %s :%s", c->id, FwdMsg );
294 else IRC_WriteStrServersPrefix( Client_NextHop( c ), c, "SQUIT %s :", c->id );
299 if( c->conn_id != NONE )
301 if( c->id[0] ) Log( LOG_NOTICE, "Client \"%s\" unregistered (connection %d): %s", c->id, c->conn_id, txt );
302 else Log( LOG_NOTICE, "Client unregistered (connection %d): %s", c->conn_id, txt );
304 Log(LOG_WARNING, "Unregistered unknown client \"%s\": %s",
305 c->id[0] ? c->id : "(No Nick)", txt );
313 c = (CLIENT *)c->next;
315 } /* Client_Destroy */
319 * Set client hostname.
321 * If global hostname cloaking is in effect, don't set the real hostname
322 * but the configured one.
324 * @param Client The client of which the hostname should be set.
325 * @param Hostname The new hostname.
328 Client_SetHostname( CLIENT *Client, const char *Hostname )
330 assert(Client != NULL);
331 assert(Hostname != NULL);
333 if (strlen(Conf_CloakHost)) {
334 LogDebug("Updating hostname of \"%s\": \"%s\" -> \"%s\"",
335 Client_ID(Client), Client->host, Conf_CloakHost);
336 strlcpy(Client->host, Conf_CloakHost, sizeof(Client->host));
338 LogDebug("Updating hostname of \"%s\": \"%s\" -> \"%s\"",
339 Client_ID(Client), Client->host, Hostname);
340 strlcpy(Client->host, Hostname, sizeof(Client->host));
342 } /* Client_SetHostname */
346 Client_SetID( CLIENT *Client, const char *ID )
348 assert( Client != NULL );
349 assert( ID != NULL );
351 strlcpy( Client->id, ID, sizeof( Client->id ));
353 if (Conf_CloakUserToNick) {
354 strlcpy( Client->user, ID, sizeof( Client->user ));
355 strlcpy( Client->info, ID, sizeof( Client->info ));
359 Client->hash = Hash( Client->id );
364 Client_SetUser( CLIENT *Client, const char *User, bool Idented )
366 /* set clients username */
368 assert( Client != NULL );
369 assert( User != NULL );
371 if (Conf_CloakUserToNick) {
372 strlcpy(Client->user, Client->id, sizeof(Client->user));
373 } else if (Idented) {
374 strlcpy(Client->user, User, sizeof(Client->user));
376 Client->user[0] = '~';
377 strlcpy(Client->user + 1, User, sizeof(Client->user) - 1);
379 } /* Client_SetUser */
383 * Set "original" user name of a client.
384 * This function saves the "original" user name, the user name specified by
385 * the peer using the USER command, into the CLIENT structure. This user
386 * name may be used for authentication, for example.
387 * @param Client The client.
388 * @param User User name to set.
391 Client_SetOrigUser(CLIENT UNUSED *Client, const char UNUSED *User)
393 assert(Client != NULL);
394 assert(User != NULL);
396 #if defined(PAM) && defined(IDENTAUTH)
397 strlcpy(Client->orig_user, User, sizeof(Client->orig_user));
399 } /* Client_SetOrigUser */
403 Client_SetInfo( CLIENT *Client, const char *Info )
405 /* set client hostname */
407 assert( Client != NULL );
408 assert( Info != NULL );
410 if (Conf_CloakUserToNick)
411 strlcpy(Client->info, Client->id, sizeof(Client->info));
413 strlcpy(Client->info, Info, sizeof(Client->info));
414 } /* Client_SetInfo */
418 Client_SetModes( CLIENT *Client, const char *Modes )
420 assert( Client != NULL );
421 assert( Modes != NULL );
423 strlcpy(Client->modes, Modes, sizeof( Client->modes ));
424 } /* Client_SetModes */
428 Client_SetFlags( CLIENT *Client, const char *Flags )
430 assert( Client != NULL );
431 assert( Flags != NULL );
433 strlcpy(Client->flags, Flags, sizeof(Client->flags));
434 } /* Client_SetFlags */
438 Client_SetPassword( CLIENT *Client, const char *Pwd )
440 /* set password sent by client */
442 assert( Client != NULL );
443 assert( Pwd != NULL );
445 strlcpy(Client->pwd, Pwd, sizeof(Client->pwd));
446 } /* Client_SetPassword */
450 Client_SetAway( CLIENT *Client, const char *Txt )
452 /* Set AWAY reason of client */
454 assert( Client != NULL );
455 assert( Txt != NULL );
457 strlcpy( Client->away, Txt, sizeof( Client->away ));
458 LogDebug("%s \"%s\" is away: %s", Client_TypeText(Client),
459 Client_Mask(Client), Txt);
460 } /* Client_SetAway */
464 Client_SetType( CLIENT *Client, int Type )
466 assert( Client != NULL );
468 if( Type == CLIENT_SERVER ) Generate_MyToken( Client );
469 Adjust_Counters( Client );
470 } /* Client_SetType */
474 Client_SetHops( CLIENT *Client, int Hops )
476 assert( Client != NULL );
478 } /* Client_SetHops */
482 Client_SetToken( CLIENT *Client, int Token )
484 assert( Client != NULL );
485 Client->token = Token;
486 } /* Client_SetToken */
490 Client_SetIntroducer( CLIENT *Client, CLIENT *Introducer )
492 assert( Client != NULL );
493 assert( Introducer != NULL );
494 Client->introducer = Introducer;
495 } /* Client_SetIntroducer */
499 Client_SetOperByMe( CLIENT *Client, bool OperByMe )
501 assert( Client != NULL );
502 Client->oper_by_me = OperByMe;
503 } /* Client_SetOperByMe */
507 Client_ModeAdd( CLIENT *Client, char Mode )
510 * If Client already alread had Mode, return false.
511 * If the Mode was newly set, return true.
516 assert( Client != NULL );
518 x[0] = Mode; x[1] = '\0';
519 if (!strchr( Client->modes, x[0])) {
520 strlcat( Client->modes, x, sizeof( Client->modes ));
524 } /* Client_ModeAdd */
528 Client_ModeDel( CLIENT *Client, char Mode )
531 * If Mode was removed, return true.
532 * If Client did not have Mode, return false.
537 assert( Client != NULL );
539 x[0] = Mode; x[1] = '\0';
541 p = strchr( Client->modes, x[0] );
542 if( ! p ) return false;
544 /* Client has Mode -> delete */
551 } /* Client_ModeDel */
555 Client_Search( const char *Nick )
557 /* return Client-Structure that has the corresponding Nick.
558 * If none is found, return NULL.
561 char search_id[CLIENT_ID_LEN], *ptr;
565 assert( Nick != NULL );
567 /* copy Nick and truncate hostmask if necessary */
568 strlcpy( search_id, Nick, sizeof( search_id ));
569 ptr = strchr( search_id, '!' );
570 if( ptr ) *ptr = '\0';
572 search_hash = Hash(search_id);
576 if (c->hash == search_hash && strcasecmp(c->id, search_id) == 0)
578 c = (CLIENT *)c->next;
581 } /* Client_Search */
585 * Get client structure ("introducer") identfied by a server token.
586 * @return CLIENT structure or NULL if none could be found.
589 Client_GetFromToken( CLIENT *Client, int Token )
593 assert( Client != NULL );
600 if ((c->type == CLIENT_SERVER) && (c->introducer == Client) &&
603 c = (CLIENT *)c->next;
606 } /* Client_GetFromToken */
610 Client_Type( CLIENT *Client )
612 assert( Client != NULL );
618 Client_Conn( CLIENT *Client )
620 assert( Client != NULL );
621 return Client->conn_id;
626 Client_ID( CLIENT *Client )
628 assert( Client != NULL );
631 if(Client->type == CLIENT_USER)
632 assert(strlen(Client->id) < Conf_MaxNickLength);
635 if( Client->id[0] ) return Client->id;
641 Client_Info( CLIENT *Client )
643 assert( Client != NULL );
649 Client_User( CLIENT *Client )
651 assert( Client != NULL );
652 return Client->user[0] ? Client->user : "~";
659 * Get the "original" user name as supplied by the USER command.
660 * The user name as given by the client is used for authentication instead
661 * of the one detected using IDENT requests.
662 * @param Client The client.
663 * @return Original user name.
666 Client_OrigUser(CLIENT *Client) {
668 char *user = Client->user;
674 return Client->orig_user;
676 } /* Client_OrigUser */
682 * Return the hostname of a client.
683 * @param Client Pointer to client structure
684 * @return Pointer to client hostname
687 Client_Hostname(CLIENT *Client)
689 assert (Client != NULL);
691 } /* Client_Hostname */
695 * Get potentially cloaked hostname of a client.
696 * If the client has not enabled cloaking, the real hostname is used.
697 * @param Client Pointer to client structure
698 * @return Pointer to client hostname
701 Client_HostnameCloaked(CLIENT *Client)
703 assert(Client != NULL);
704 if (Client_HasMode(Client, 'x'))
705 return Client_ID(Client->introducer);
707 return Client_Hostname(Client);
708 } /* Client_HostnameCloaked */
712 Client_Password( CLIENT *Client )
714 assert( Client != NULL );
716 } /* Client_Password */
720 Client_Modes( CLIENT *Client )
722 assert( Client != NULL );
723 return Client->modes;
728 Client_Flags( CLIENT *Client )
730 assert( Client != NULL );
731 return Client->flags;
736 Client_OperByMe( CLIENT *Client )
738 assert( Client != NULL );
739 return Client->oper_by_me;
740 } /* Client_OperByMe */
744 Client_Hops( CLIENT *Client )
746 assert( Client != NULL );
752 Client_Token( CLIENT *Client )
754 assert( Client != NULL );
755 return Client->token;
760 Client_MyToken( CLIENT *Client )
762 assert( Client != NULL );
763 return Client->mytoken;
764 } /* Client_MyToken */
768 Client_NextHop( CLIENT *Client )
772 assert( Client != NULL );
775 while( c->introducer && ( c->introducer != c ) && ( c->introducer != This_Server ))
779 } /* Client_NextHop */
783 * Return ID of a client: "client!user@host"
784 * This client ID is used for IRC prefixes, for example.
785 * Please note that this function uses a global static buffer, so you can't
786 * nest invocations without overwriting earlier results!
787 * @param Client Pointer to client structure
788 * @return Pointer to global buffer containing the client ID
791 Client_Mask( CLIENT *Client )
793 static char Mask_Buffer[GETID_LEN];
795 assert (Client != NULL);
797 /* Servers: return name only, there is no "mask" */
798 if (Client->type == CLIENT_SERVER)
801 snprintf(Mask_Buffer, GETID_LEN, "%s!%s@%s",
802 Client->id, Client->user, Client->host);
808 * Return ID of a client with cloaked hostname: "client!user@server-name"
809 * This client ID is used for IRC prefixes, for example.
810 * Please note that this function uses a global static buffer, so you can't
811 * nest invocations without overwriting earlier results!
812 * If the client has not enabled cloaking, the real hostname is used.
813 * @param Client Pointer to client structure
814 * @return Pointer to global buffer containing the client ID
817 Client_MaskCloaked(CLIENT *Client)
819 static char Mask_Buffer[GETID_LEN];
820 char Cloak_Buffer[GETID_LEN];
822 assert (Client != NULL);
824 /* Is the client using cloaking at all? */
825 if (!Client_HasMode(Client, 'x'))
826 return Client_Mask(Client);
828 if(*Conf_CloakHostModeX) {
829 snprintf(Mask_Buffer, GETID_LEN, "%s%s", Client->host, Conf_CloakHostModeXSalt);
830 snprintf(Cloak_Buffer, GETID_LEN, Conf_CloakHostModeX, Hash(Mask_Buffer));
832 strncpy(Cloak_Buffer, Client_ID(Client->introducer), GETID_LEN);
835 snprintf(Mask_Buffer, GETID_LEN, "%s!%s@%s",
836 Client->id, Client->user, Cloak_Buffer);
839 } /* Client_MaskCloaked */
843 Client_Introducer( CLIENT *Client )
845 assert( Client != NULL );
846 return Client->introducer;
847 } /* Client_Introducer */
851 Client_TopServer( CLIENT *Client )
853 assert( Client != NULL );
854 return Client->topserver;
855 } /* Client_TopServer */
859 Client_HasMode( CLIENT *Client, char Mode )
861 assert( Client != NULL );
862 return strchr( Client->modes, Mode ) != NULL;
863 } /* Client_HasMode */
867 Client_Away( CLIENT *Client )
869 assert( Client != NULL );
875 * Make sure that a given nickname is valid.
877 * If the nickname is not valid for the given client, this function sends back
878 * the appropriate error messages.
880 * @param Client Client that wants to change the nickname.
881 * @param Nick New nick name.
882 * @returns true if nickname is valid, false otherwise.
885 Client_CheckNick(CLIENT *Client, char *Nick)
887 assert(Client != NULL);
888 assert(Nick != NULL);
890 if (!Client_IsValidNick(Nick)) {
891 if (strlen(Nick ) >= Conf_MaxNickLength)
892 IRC_WriteStrClient(Client, ERR_NICKNAMETOOLONG_MSG,
893 Client_ID(Client), Nick,
894 Conf_MaxNickLength - 1);
896 IRC_WriteStrClient(Client, ERR_ERRONEUSNICKNAME_MSG,
897 Client_ID(Client), Nick);
901 /* Nickname already registered? */
902 if (Client_Search(Nick)) {
903 IRC_WriteStrClient(Client, ERR_NICKNAMEINUSE_MSG,
904 Client_ID(Client), Nick);
909 } /* Client_CheckNick */
913 Client_CheckID( CLIENT *Client, char *ID )
915 char str[COMMAND_LEN];
918 assert( Client != NULL );
919 assert( Client->conn_id > NONE );
920 assert( ID != NULL );
923 if (strlen(ID) > CLIENT_ID_LEN) {
924 IRC_WriteStrClient(Client, ERR_ERRONEUSNICKNAME_MSG, Client_ID(Client), ID);
928 /* ID already in use? */
931 if (strcasecmp(c->id, ID) == 0) {
932 snprintf(str, sizeof(str), "ID \"%s\" already registered", ID);
933 if (c->conn_id != NONE)
934 Log(LOG_ERR, "%s (on connection %d)!", str, c->conn_id);
936 Log(LOG_ERR, "%s (via network)!", str);
937 Conn_Close(Client->conn_id, str, str, true);
940 c = (CLIENT *)c->next;
944 } /* Client_CheckID */
955 Client_Next( CLIENT *c )
958 return (CLIENT *)c->next;
963 Client_UserCount( void )
965 return Count( CLIENT_USER );
966 } /* Client_UserCount */
970 Client_ServiceCount( void )
972 return Count( CLIENT_SERVICE );;
973 } /* Client_ServiceCount */
977 Client_ServerCount( void )
979 return Count( CLIENT_SERVER );
980 } /* Client_ServerCount */
984 Client_MyUserCount( void )
986 return MyCount( CLIENT_USER );
987 } /* Client_MyUserCount */
991 Client_MyServiceCount( void )
993 return MyCount( CLIENT_SERVICE );
994 } /* Client_MyServiceCount */
998 Client_MyServerCount( void )
1001 unsigned long cnt = 0;
1006 if(( c->type == CLIENT_SERVER ) && ( c->hops == 1 )) cnt++;
1007 c = (CLIENT *)c->next;
1010 } /* Client_MyServerCount */
1013 GLOBAL unsigned long
1014 Client_OperCount( void )
1017 unsigned long cnt = 0;
1022 if( c && ( c->type == CLIENT_USER ) && ( strchr( c->modes, 'o' ))) cnt++;
1023 c = (CLIENT *)c->next;
1026 } /* Client_OperCount */
1029 GLOBAL unsigned long
1030 Client_UnknownCount( void )
1033 unsigned long cnt = 0;
1038 if( c && ( c->type != CLIENT_USER ) && ( c->type != CLIENT_SERVICE ) && ( c->type != CLIENT_SERVER )) cnt++;
1039 c = (CLIENT *)c->next;
1043 } /* Client_UnknownCount */
1047 Client_MaxUserCount( void )
1050 } /* Client_MaxUserCount */
1054 Client_MyMaxUserCount( void )
1056 return My_Max_Users;
1057 } /* Client_MyMaxUserCount */
1061 * Check that a given nickname is valid.
1063 * @param Nick the nickname to check.
1064 * @returns true if nickname is valid, false otherwise.
1067 Client_IsValidNick(const char *Nick)
1070 static const char goodchars[] = ";0123456789-";
1072 assert (Nick != NULL);
1074 if (strchr(goodchars, Nick[0]))
1076 if (strlen(Nick ) >= Conf_MaxNickLength)
1081 if (*ptr < 'A' && !strchr(goodchars, *ptr ))
1089 } /* Client_IsValidNick */
1093 * Return pointer to "My_Whowas" structure.
1096 Client_GetWhowas( void )
1099 } /* Client_GetWhowas */
1102 * Return the index of the last used WHOWAS entry.
1105 Client_GetLastWhowasIndex( void )
1108 } /* Client_GetLastWhowasIndex */
1112 * Get the start time of this client.
1113 * The result is the start time in seconds since 1970-01-01, as reported
1114 * by the C function time(NULL).
1117 Client_StartTime(CLIENT *Client)
1119 assert( Client != NULL );
1120 return Client->starttime;
1121 } /* Client_Uptime */
1125 * Reject a client when logging in.
1127 * This function is called when a client isn't allowed to connect to this
1128 * server. Possible reasons are bad server password, bad PAM password,
1129 * or that the client is G/K-Line'd.
1131 * After calling this function, the client isn't connected any more.
1133 * @param Client The client to reject.
1134 * @param Reason The reason why the client has been rejected.
1135 * @param InformClient If true, send the exact reason to the client.
1138 Client_Reject(CLIENT *Client, const char *Reason, bool InformClient)
1140 char info[COMMAND_LEN];
1142 assert(Client != NULL);
1143 assert(Reason != NULL);
1146 snprintf(info, sizeof(info), "Access denied: %s", Reason);
1148 strcpy(info, "Access denied: Bad password?");
1151 "User \"%s\" rejected (connection %d): %s!",
1152 Client_Mask(Client), Client_Conn(Client), Reason);
1153 Conn_Close(Client_Conn(Client), Reason, info, true);
1158 * Introduce a new user or service client in the network.
1160 * @param From Remote server introducing the client or NULL (local).
1161 * @param Client New client.
1162 * @param Type Type of the client (CLIENT_USER or CLIENT_SERVICE).
1165 Client_Introduce(CLIENT *From, CLIENT *Client, int Type)
1167 /* Set client type (user or service) */
1168 Client_SetType(Client, Type);
1171 if (Conf_IsService(Conf_GetServer(Client_Conn(From)),
1173 Client_SetType(Client, CLIENT_SERVICE);
1174 LogDebug("%s \"%s\" (+%s) registered (via %s, on %s, %d hop%s).",
1175 Client_TypeText(Client), Client_Mask(Client),
1176 Client_Modes(Client), Client_ID(From),
1177 Client_ID(Client_Introducer(Client)),
1178 Client_Hops(Client), Client_Hops(Client) > 1 ? "s": "");
1180 Log(LOG_NOTICE, "%s \"%s\" registered (connection %d).",
1181 Client_TypeText(Client), Client_Mask(Client),
1182 Client_Conn(Client));
1183 Log_ServerNotice('c', "Client connecting: %s (%s@%s) [%s] - %s",
1184 Client_ID(Client), Client_User(Client),
1185 Client_Hostname(Client),
1186 Conn_IPA(Client_Conn(Client)),
1187 Client_TypeText(Client));
1190 /* Inform other servers */
1191 IRC_WriteStrServersPrefixFlag_CB(From,
1192 From != NULL ? From : Client_ThisServer(),
1193 '\0', cb_introduceClient, (void *)Client);
1194 } /* Client_Introduce */
1197 static unsigned long
1198 Count( CLIENT_TYPE Type )
1201 unsigned long cnt = 0;
1206 if( c->type == Type ) cnt++;
1207 c = (CLIENT *)c->next;
1213 static unsigned long
1214 MyCount( CLIENT_TYPE Type )
1217 unsigned long cnt = 0;
1222 if(( c->introducer == This_Server ) && ( c->type == Type )) cnt++;
1223 c = (CLIENT *)c->next;
1230 New_Client_Struct( void )
1232 /* Neue CLIENT-Struktur pre-initialisieren */
1236 c = (CLIENT *)malloc( sizeof( CLIENT ));
1239 Log( LOG_EMERG, "Can't allocate memory! [New_Client_Struct]" );
1243 memset( c, 0, sizeof ( CLIENT ));
1245 c->type = CLIENT_UNKNOWN;
1247 c->oper_by_me = false;
1257 Generate_MyToken( CLIENT *Client )
1266 if( c->mytoken == token )
1268 /* Das Token wurde bereits vergeben */
1273 else c = (CLIENT *)c->next;
1275 Client->mytoken = token;
1276 LogDebug("Assigned token %d to server \"%s\".", token, Client->id);
1277 } /* Generate_MyToken */
1281 Adjust_Counters( CLIENT *Client )
1285 assert( Client != NULL );
1287 if( Client->type != CLIENT_USER ) return;
1289 if( Client->conn_id != NONE )
1291 /* Local connection */
1292 count = Client_MyUserCount( );
1293 if( count > My_Max_Users ) My_Max_Users = count;
1295 count = Client_UserCount( );
1296 if( count > Max_Users ) Max_Users = count;
1297 } /* Adjust_Counters */
1301 * Register client in My_Whowas structure for further recall by WHOWAS.
1302 * Note: Only clients that have been connected at least 30 seconds will be
1303 * registered to prevent automated IRC bots to "destroy" a nice server
1307 Client_RegisterWhowas( CLIENT *Client )
1312 assert( Client != NULL );
1314 /* Don't register WHOWAS information when "MorePrivacy" is enabled. */
1315 if (Conf_MorePrivacy)
1319 /* Don't register clients that were connected less than 30 seconds. */
1320 if( now - Client->starttime < 30 )
1323 slot = Last_Whowas + 1;
1324 if( slot >= MAX_WHOWAS || slot < 0 ) slot = 0;
1327 Log( LOG_DEBUG, "Saving WHOWAS information to slot %d ...", slot );
1330 My_Whowas[slot].time = now;
1331 strlcpy( My_Whowas[slot].id, Client_ID( Client ),
1332 sizeof( My_Whowas[slot].id ));
1333 strlcpy( My_Whowas[slot].user, Client_User( Client ),
1334 sizeof( My_Whowas[slot].user ));
1335 strlcpy( My_Whowas[slot].host, Client_HostnameCloaked( Client ),
1336 sizeof( My_Whowas[slot].host ));
1337 strlcpy( My_Whowas[slot].info, Client_Info( Client ),
1338 sizeof( My_Whowas[slot].info ));
1339 strlcpy( My_Whowas[slot].server, Client_ID( Client_Introducer( Client )),
1340 sizeof( My_Whowas[slot].server ));
1343 } /* Client_RegisterWhowas */
1347 Client_TypeText(CLIENT *Client)
1349 assert(Client != NULL);
1350 switch (Client_Type(Client)) {
1354 case CLIENT_SERVICE:
1363 } /* Client_TypeText */
1367 * Destroy user or service client.
1370 Destroy_UserOrService(CLIENT *Client, const char *Txt, const char *FwdMsg, bool SendQuit)
1372 if(Client->conn_id != NONE) {
1373 /* Local (directly connected) client */
1375 "%s \"%s\" unregistered (connection %d): %s",
1376 Client_TypeText(Client), Client_Mask(Client),
1377 Client->conn_id, Txt);
1378 Log_ServerNotice('c', "Client exiting: %s (%s@%s) [%s]",
1379 Client_ID(Client), Client_User(Client),
1380 Client_Hostname(Client), Txt);
1383 /* Inforam all the other servers */
1385 IRC_WriteStrServersPrefix(NULL,
1386 Client, "QUIT :%s", FwdMsg );
1388 IRC_WriteStrServersPrefix(NULL,
1393 LogDebug("%s \"%s\" unregistered: %s",
1394 Client_TypeText(Client), Client_Mask(Client), Txt);
1397 /* Inform all the other servers, but the ones in the
1398 * direction we got the QUIT from */
1400 IRC_WriteStrServersPrefix(Client_NextHop(Client),
1401 Client, "QUIT :%s", FwdMsg );
1403 IRC_WriteStrServersPrefix(Client_NextHop(Client),
1408 /* Unregister client from channels */
1409 Channel_Quit(Client, FwdMsg ? FwdMsg : Client->id);
1411 /* Register client in My_Whowas structure */
1412 Client_RegisterWhowas(Client);
1413 } /* Destroy_UserOrService */
1417 * Introduce a new user or service client to a remote server.
1419 * This function differentiates between RFC1459 and RFC2813 server links and
1420 * generates the appropriate commands to register the new user or service.
1422 * @param To The remote server to inform.
1423 * @param Prefix Prefix for the generated commands.
1424 * @param data CLIENT structure of the new client.
1427 cb_introduceClient(CLIENT *To, CLIENT *Prefix, void *data)
1429 CLIENT *c = (CLIENT *)data;
1431 char *modes, *user, *host;
1433 modes = Client_Modes(c);
1434 user = Client_User(c) ? Client_User(c) : "-";
1435 host = Client_Hostname(c) ? Client_Hostname(c) : "-";
1437 conn = Client_Conn(To);
1438 if (Conn_Options(conn) & CONN_RFC1459) {
1439 /* RFC 1459 mode: separate NICK and USER commands */
1440 Conn_WriteStr(conn, "NICK %s :%d", Client_ID(c),
1441 Client_Hops(c) + 1);
1442 Conn_WriteStr(conn, ":%s USER %s %s %s :%s",
1443 Client_ID(c), user, host,
1444 Client_ID(Client_Introducer(c)), Client_Info(c));
1446 Conn_WriteStr(conn, ":%s MODE %s +%s",
1447 Client_ID(c), Client_ID(c), modes);
1449 /* RFC 2813 mode: one combined NICK or SERVICE command */
1450 if (Client_Type(c) == CLIENT_SERVICE
1451 && strchr(Client_Flags(To), 'S'))
1452 IRC_WriteStrClientPrefix(To, Prefix,
1453 "SERVICE %s %d * +%s %d :%s",
1455 Client_MyToken(Client_Introducer(c)),
1456 Client_Modes(c), Client_Hops(c) + 1,
1459 IRC_WriteStrClientPrefix(To, Prefix,
1460 "NICK %s %d %s %s %d +%s :%s",
1461 Client_ID(c), Client_Hops(c) + 1,
1463 Client_MyToken(Client_Introducer(c)),
1464 modes, Client_Info(c));
1466 } /* cb_introduceClient */
1472 Client_DebugDump(void)
1476 Log(LOG_DEBUG, "Client status:");
1480 " - %s: type=%d, host=%s, user=%s, conn=%d, start=%ld, flags=%s",
1481 Client_ID(c), Client_Type(c), Client_Hostname(c),
1482 Client_User(c), Client_Conn(c), Client_StartTime(c),
1484 c = (CLIENT *)c->next;
1486 } /* Client_DumpClients */