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 char cloak[GETID_LEN];
336 strlcpy(cloak, Hostname, GETID_LEN);
337 strlcat(cloak, Conf_CloakHostSalt, GETID_LEN);
338 snprintf(cloak, GETID_LEN, Conf_CloakHost, Hash(cloak));
340 LogDebug("Updating hostname of \"%s\": \"%s\" -> \"%s\"",
341 Client_ID(Client), Client->host, cloak);
342 strlcpy(Client->host, cloak, sizeof(Client->host));
344 LogDebug("Updating hostname of \"%s\": \"%s\" -> \"%s\"",
345 Client_ID(Client), Client->host, Hostname);
346 strlcpy(Client->host, Hostname, sizeof(Client->host));
348 } /* Client_SetHostname */
352 Client_SetID( CLIENT *Client, const char *ID )
354 assert( Client != NULL );
355 assert( ID != NULL );
357 strlcpy( Client->id, ID, sizeof( Client->id ));
359 if (Conf_CloakUserToNick) {
360 strlcpy( Client->user, ID, sizeof( Client->user ));
361 strlcpy( Client->info, ID, sizeof( Client->info ));
365 Client->hash = Hash( Client->id );
370 Client_SetUser( CLIENT *Client, const char *User, bool Idented )
372 /* set clients username */
374 assert( Client != NULL );
375 assert( User != NULL );
377 if (Conf_CloakUserToNick) {
378 strlcpy(Client->user, Client->id, sizeof(Client->user));
379 } else if (Idented) {
380 strlcpy(Client->user, User, sizeof(Client->user));
382 Client->user[0] = '~';
383 strlcpy(Client->user + 1, User, sizeof(Client->user) - 1);
385 } /* Client_SetUser */
389 * Set "original" user name of a client.
390 * This function saves the "original" user name, the user name specified by
391 * the peer using the USER command, into the CLIENT structure. This user
392 * name may be used for authentication, for example.
393 * @param Client The client.
394 * @param User User name to set.
397 Client_SetOrigUser(CLIENT UNUSED *Client, const char UNUSED *User)
399 assert(Client != NULL);
400 assert(User != NULL);
402 #if defined(PAM) && defined(IDENTAUTH)
403 strlcpy(Client->orig_user, User, sizeof(Client->orig_user));
405 } /* Client_SetOrigUser */
409 Client_SetInfo( CLIENT *Client, const char *Info )
411 /* set client hostname */
413 assert( Client != NULL );
414 assert( Info != NULL );
416 if (Conf_CloakUserToNick)
417 strlcpy(Client->info, Client->id, sizeof(Client->info));
419 strlcpy(Client->info, Info, sizeof(Client->info));
420 } /* Client_SetInfo */
424 Client_SetModes( CLIENT *Client, const char *Modes )
426 assert( Client != NULL );
427 assert( Modes != NULL );
429 strlcpy(Client->modes, Modes, sizeof( Client->modes ));
430 } /* Client_SetModes */
434 Client_SetFlags( CLIENT *Client, const char *Flags )
436 assert( Client != NULL );
437 assert( Flags != NULL );
439 strlcpy(Client->flags, Flags, sizeof(Client->flags));
440 } /* Client_SetFlags */
444 Client_SetAway( CLIENT *Client, const char *Txt )
446 /* Set AWAY reason of client */
448 assert( Client != NULL );
449 assert( Txt != NULL );
451 strlcpy( Client->away, Txt, sizeof( Client->away ));
452 LogDebug("%s \"%s\" is away: %s", Client_TypeText(Client),
453 Client_Mask(Client), Txt);
454 } /* Client_SetAway */
458 Client_SetType( CLIENT *Client, int Type )
460 assert( Client != NULL );
462 if( Type == CLIENT_SERVER ) Generate_MyToken( Client );
463 Adjust_Counters( Client );
464 } /* Client_SetType */
468 Client_SetHops( CLIENT *Client, int Hops )
470 assert( Client != NULL );
472 } /* Client_SetHops */
476 Client_SetToken( CLIENT *Client, int Token )
478 assert( Client != NULL );
479 Client->token = Token;
480 } /* Client_SetToken */
484 Client_SetIntroducer( CLIENT *Client, CLIENT *Introducer )
486 assert( Client != NULL );
487 assert( Introducer != NULL );
488 Client->introducer = Introducer;
489 } /* Client_SetIntroducer */
493 Client_SetOperByMe( CLIENT *Client, bool OperByMe )
495 assert( Client != NULL );
496 Client->oper_by_me = OperByMe;
497 } /* Client_SetOperByMe */
501 Client_ModeAdd( CLIENT *Client, char Mode )
504 * If Client already alread had Mode, return false.
505 * If the Mode was newly set, return true.
510 assert( Client != NULL );
512 x[0] = Mode; x[1] = '\0';
513 if (!strchr( Client->modes, x[0])) {
514 strlcat( Client->modes, x, sizeof( Client->modes ));
518 } /* Client_ModeAdd */
522 Client_ModeDel( CLIENT *Client, char Mode )
525 * If Mode was removed, return true.
526 * If Client did not have Mode, return false.
531 assert( Client != NULL );
533 x[0] = Mode; x[1] = '\0';
535 p = strchr( Client->modes, x[0] );
536 if( ! p ) return false;
538 /* Client has Mode -> delete */
545 } /* Client_ModeDel */
549 Client_Search( const char *Nick )
551 /* return Client-Structure that has the corresponding Nick.
552 * If none is found, return NULL.
555 char search_id[CLIENT_ID_LEN], *ptr;
559 assert( Nick != NULL );
561 /* copy Nick and truncate hostmask if necessary */
562 strlcpy( search_id, Nick, sizeof( search_id ));
563 ptr = strchr( search_id, '!' );
564 if( ptr ) *ptr = '\0';
566 search_hash = Hash(search_id);
570 if (c->hash == search_hash && strcasecmp(c->id, search_id) == 0)
572 c = (CLIENT *)c->next;
575 } /* Client_Search */
579 * Get client structure ("introducer") identfied by a server token.
580 * @return CLIENT structure or NULL if none could be found.
583 Client_GetFromToken( CLIENT *Client, int Token )
587 assert( Client != NULL );
594 if ((c->type == CLIENT_SERVER) && (c->introducer == Client) &&
597 c = (CLIENT *)c->next;
600 } /* Client_GetFromToken */
604 Client_Type( CLIENT *Client )
606 assert( Client != NULL );
612 Client_Conn( CLIENT *Client )
614 assert( Client != NULL );
615 return Client->conn_id;
620 Client_ID( CLIENT *Client )
622 assert( Client != NULL );
625 if(Client->type == CLIENT_USER)
626 assert(strlen(Client->id) < Conf_MaxNickLength);
629 if( Client->id[0] ) return Client->id;
635 Client_Info( CLIENT *Client )
637 assert( Client != NULL );
643 Client_User( CLIENT *Client )
645 assert( Client != NULL );
646 return Client->user[0] ? Client->user : "~";
653 * Get the "original" user name as supplied by the USER command.
654 * The user name as given by the client is used for authentication instead
655 * of the one detected using IDENT requests.
656 * @param Client The client.
657 * @return Original user name.
660 Client_OrigUser(CLIENT *Client) {
662 char *user = Client->user;
668 return Client->orig_user;
670 } /* Client_OrigUser */
676 * Return the hostname of a client.
677 * @param Client Pointer to client structure
678 * @return Pointer to client hostname
681 Client_Hostname(CLIENT *Client)
683 assert (Client != NULL);
685 } /* Client_Hostname */
689 * Get potentially cloaked hostname of a client.
690 * If the client has not enabled cloaking, the real hostname is used.
691 * @param Client Pointer to client structure
692 * @return Pointer to client hostname
695 Client_HostnameCloaked(CLIENT *Client)
697 assert(Client != NULL);
698 if (Client_HasMode(Client, 'x'))
699 return Client_ID(Client->introducer);
701 return Client_Hostname(Client);
702 } /* Client_HostnameCloaked */
706 Client_Modes( CLIENT *Client )
708 assert( Client != NULL );
709 return Client->modes;
714 Client_Flags( CLIENT *Client )
716 assert( Client != NULL );
717 return Client->flags;
722 Client_OperByMe( CLIENT *Client )
724 assert( Client != NULL );
725 return Client->oper_by_me;
726 } /* Client_OperByMe */
730 Client_Hops( CLIENT *Client )
732 assert( Client != NULL );
738 Client_Token( CLIENT *Client )
740 assert( Client != NULL );
741 return Client->token;
746 Client_MyToken( CLIENT *Client )
748 assert( Client != NULL );
749 return Client->mytoken;
750 } /* Client_MyToken */
754 Client_NextHop( CLIENT *Client )
758 assert( Client != NULL );
761 while( c->introducer && ( c->introducer != c ) && ( c->introducer != This_Server ))
765 } /* Client_NextHop */
769 * Return ID of a client: "client!user@host"
770 * This client ID is used for IRC prefixes, for example.
771 * Please note that this function uses a global static buffer, so you can't
772 * nest invocations without overwriting earlier results!
773 * @param Client Pointer to client structure
774 * @return Pointer to global buffer containing the client ID
777 Client_Mask( CLIENT *Client )
779 static char Mask_Buffer[GETID_LEN];
781 assert (Client != NULL);
783 /* Servers: return name only, there is no "mask" */
784 if (Client->type == CLIENT_SERVER)
787 snprintf(Mask_Buffer, GETID_LEN, "%s!%s@%s",
788 Client->id, Client->user, Client->host);
794 * Return ID of a client with cloaked hostname: "client!user@server-name"
795 * This client ID is used for IRC prefixes, for example.
796 * Please note that this function uses a global static buffer, so you can't
797 * nest invocations without overwriting earlier results!
798 * If the client has not enabled cloaking, the real hostname is used.
799 * @param Client Pointer to client structure
800 * @return Pointer to global buffer containing the client ID
803 Client_MaskCloaked(CLIENT *Client)
805 static char Mask_Buffer[GETID_LEN];
806 char Cloak_Buffer[GETID_LEN];
808 assert (Client != NULL);
810 /* Is the client using cloaking at all? */
811 if (!Client_HasMode(Client, 'x'))
812 return Client_Mask(Client);
814 if(*Conf_CloakHostModeX) {
815 strlcpy(Cloak_Buffer, Client->host, GETID_LEN);
816 strlcat(Cloak_Buffer, Conf_CloakHostSalt, GETID_LEN);
817 snprintf(Cloak_Buffer, GETID_LEN, Conf_CloakHostModeX, Hash(Cloak_Buffer));
819 strncpy(Cloak_Buffer, Client_ID(Client->introducer), GETID_LEN);
822 snprintf(Mask_Buffer, GETID_LEN, "%s!%s@%s",
823 Client->id, Client->user, Cloak_Buffer);
826 } /* Client_MaskCloaked */
830 Client_Introducer( CLIENT *Client )
832 assert( Client != NULL );
833 return Client->introducer;
834 } /* Client_Introducer */
838 Client_TopServer( CLIENT *Client )
840 assert( Client != NULL );
841 return Client->topserver;
842 } /* Client_TopServer */
846 Client_HasMode( CLIENT *Client, char Mode )
848 assert( Client != NULL );
849 return strchr( Client->modes, Mode ) != NULL;
850 } /* Client_HasMode */
854 Client_Away( CLIENT *Client )
856 assert( Client != NULL );
862 * Make sure that a given nickname is valid.
864 * If the nickname is not valid for the given client, this function sends back
865 * the appropriate error messages.
867 * @param Client Client that wants to change the nickname.
868 * @param Nick New nick name.
869 * @returns true if nickname is valid, false otherwise.
872 Client_CheckNick(CLIENT *Client, char *Nick)
874 assert(Client != NULL);
875 assert(Nick != NULL);
877 if (!Client_IsValidNick(Nick)) {
878 if (strlen(Nick ) >= Conf_MaxNickLength)
879 IRC_WriteStrClient(Client, ERR_NICKNAMETOOLONG_MSG,
880 Client_ID(Client), Nick,
881 Conf_MaxNickLength - 1);
883 IRC_WriteStrClient(Client, ERR_ERRONEUSNICKNAME_MSG,
884 Client_ID(Client), Nick);
888 /* Nickname already registered? */
889 if (Client_Search(Nick)) {
890 IRC_WriteStrClient(Client, ERR_NICKNAMEINUSE_MSG,
891 Client_ID(Client), Nick);
896 } /* Client_CheckNick */
900 Client_CheckID( CLIENT *Client, char *ID )
902 char str[COMMAND_LEN];
905 assert( Client != NULL );
906 assert( Client->conn_id > NONE );
907 assert( ID != NULL );
910 if (strlen(ID) > CLIENT_ID_LEN) {
911 IRC_WriteStrClient(Client, ERR_ERRONEUSNICKNAME_MSG, Client_ID(Client), ID);
915 /* ID already in use? */
918 if (strcasecmp(c->id, ID) == 0) {
919 snprintf(str, sizeof(str), "ID \"%s\" already registered", ID);
920 if (c->conn_id != NONE)
921 Log(LOG_ERR, "%s (on connection %d)!", str, c->conn_id);
923 Log(LOG_ERR, "%s (via network)!", str);
924 Conn_Close(Client->conn_id, str, str, true);
927 c = (CLIENT *)c->next;
931 } /* Client_CheckID */
942 Client_Next( CLIENT *c )
945 return (CLIENT *)c->next;
950 Client_UserCount( void )
952 return Count( CLIENT_USER );
953 } /* Client_UserCount */
957 Client_ServiceCount( void )
959 return Count( CLIENT_SERVICE );;
960 } /* Client_ServiceCount */
964 Client_ServerCount( void )
966 return Count( CLIENT_SERVER );
967 } /* Client_ServerCount */
971 Client_MyUserCount( void )
973 return MyCount( CLIENT_USER );
974 } /* Client_MyUserCount */
978 Client_MyServiceCount( void )
980 return MyCount( CLIENT_SERVICE );
981 } /* Client_MyServiceCount */
985 Client_MyServerCount( void )
988 unsigned long cnt = 0;
993 if(( c->type == CLIENT_SERVER ) && ( c->hops == 1 )) cnt++;
994 c = (CLIENT *)c->next;
997 } /* Client_MyServerCount */
1000 GLOBAL unsigned long
1001 Client_OperCount( void )
1004 unsigned long cnt = 0;
1009 if( c && ( c->type == CLIENT_USER ) && ( strchr( c->modes, 'o' ))) cnt++;
1010 c = (CLIENT *)c->next;
1013 } /* Client_OperCount */
1016 GLOBAL unsigned long
1017 Client_UnknownCount( void )
1020 unsigned long cnt = 0;
1025 if( c && ( c->type != CLIENT_USER ) && ( c->type != CLIENT_SERVICE ) && ( c->type != CLIENT_SERVER )) cnt++;
1026 c = (CLIENT *)c->next;
1030 } /* Client_UnknownCount */
1034 Client_MaxUserCount( void )
1037 } /* Client_MaxUserCount */
1041 Client_MyMaxUserCount( void )
1043 return My_Max_Users;
1044 } /* Client_MyMaxUserCount */
1048 * Check that a given nickname is valid.
1050 * @param Nick the nickname to check.
1051 * @returns true if nickname is valid, false otherwise.
1054 Client_IsValidNick(const char *Nick)
1057 static const char goodchars[] = ";0123456789-";
1059 assert (Nick != NULL);
1061 if (strchr(goodchars, Nick[0]))
1063 if (strlen(Nick ) >= Conf_MaxNickLength)
1068 if (*ptr < 'A' && !strchr(goodchars, *ptr ))
1076 } /* Client_IsValidNick */
1080 * Return pointer to "My_Whowas" structure.
1083 Client_GetWhowas( void )
1086 } /* Client_GetWhowas */
1089 * Return the index of the last used WHOWAS entry.
1092 Client_GetLastWhowasIndex( void )
1095 } /* Client_GetLastWhowasIndex */
1099 * Get the start time of this client.
1100 * The result is the start time in seconds since 1970-01-01, as reported
1101 * by the C function time(NULL).
1104 Client_StartTime(CLIENT *Client)
1106 assert( Client != NULL );
1107 return Client->starttime;
1108 } /* Client_Uptime */
1112 * Reject a client when logging in.
1114 * This function is called when a client isn't allowed to connect to this
1115 * server. Possible reasons are bad server password, bad PAM password,
1116 * or that the client is G/K-Line'd.
1118 * After calling this function, the client isn't connected any more.
1120 * @param Client The client to reject.
1121 * @param Reason The reason why the client has been rejected.
1122 * @param InformClient If true, send the exact reason to the client.
1125 Client_Reject(CLIENT *Client, const char *Reason, bool InformClient)
1127 char info[COMMAND_LEN];
1129 assert(Client != NULL);
1130 assert(Reason != NULL);
1133 snprintf(info, sizeof(info), "Access denied: %s", Reason);
1135 strcpy(info, "Access denied: Bad password?");
1138 "User \"%s\" rejected (connection %d): %s!",
1139 Client_Mask(Client), Client_Conn(Client), Reason);
1140 Conn_Close(Client_Conn(Client), Reason, info, true);
1145 * Introduce a new user or service client in the network.
1147 * @param From Remote server introducing the client or NULL (local).
1148 * @param Client New client.
1149 * @param Type Type of the client (CLIENT_USER or CLIENT_SERVICE).
1152 Client_Introduce(CLIENT *From, CLIENT *Client, int Type)
1154 /* Set client type (user or service) */
1155 Client_SetType(Client, Type);
1158 if (Conf_IsService(Conf_GetServer(Client_Conn(From)),
1160 Client_SetType(Client, CLIENT_SERVICE);
1161 LogDebug("%s \"%s\" (+%s) registered (via %s, on %s, %d hop%s).",
1162 Client_TypeText(Client), Client_Mask(Client),
1163 Client_Modes(Client), Client_ID(From),
1164 Client_ID(Client_Introducer(Client)),
1165 Client_Hops(Client), Client_Hops(Client) > 1 ? "s": "");
1167 Log(LOG_NOTICE, "%s \"%s\" registered (connection %d).",
1168 Client_TypeText(Client), Client_Mask(Client),
1169 Client_Conn(Client));
1170 Log_ServerNotice('c', "Client connecting: %s (%s@%s) [%s] - %s",
1171 Client_ID(Client), Client_User(Client),
1172 Client_Hostname(Client),
1173 Conn_IPA(Client_Conn(Client)),
1174 Client_TypeText(Client));
1177 /* Inform other servers */
1178 IRC_WriteStrServersPrefixFlag_CB(From,
1179 From != NULL ? From : Client_ThisServer(),
1180 '\0', cb_introduceClient, (void *)Client);
1181 } /* Client_Introduce */
1184 static unsigned long
1185 Count( CLIENT_TYPE Type )
1188 unsigned long cnt = 0;
1193 if( c->type == Type ) cnt++;
1194 c = (CLIENT *)c->next;
1200 static unsigned long
1201 MyCount( CLIENT_TYPE Type )
1204 unsigned long cnt = 0;
1209 if(( c->introducer == This_Server ) && ( c->type == Type )) cnt++;
1210 c = (CLIENT *)c->next;
1217 New_Client_Struct( void )
1219 /* Neue CLIENT-Struktur pre-initialisieren */
1223 c = (CLIENT *)malloc( sizeof( CLIENT ));
1226 Log( LOG_EMERG, "Can't allocate memory! [New_Client_Struct]" );
1230 memset( c, 0, sizeof ( CLIENT ));
1232 c->type = CLIENT_UNKNOWN;
1234 c->oper_by_me = false;
1244 Generate_MyToken( CLIENT *Client )
1253 if( c->mytoken == token )
1255 /* Das Token wurde bereits vergeben */
1260 else c = (CLIENT *)c->next;
1262 Client->mytoken = token;
1263 LogDebug("Assigned token %d to server \"%s\".", token, Client->id);
1264 } /* Generate_MyToken */
1268 Adjust_Counters( CLIENT *Client )
1272 assert( Client != NULL );
1274 if( Client->type != CLIENT_USER ) return;
1276 if( Client->conn_id != NONE )
1278 /* Local connection */
1279 count = Client_MyUserCount( );
1280 if( count > My_Max_Users ) My_Max_Users = count;
1282 count = Client_UserCount( );
1283 if( count > Max_Users ) Max_Users = count;
1284 } /* Adjust_Counters */
1288 * Register client in My_Whowas structure for further recall by WHOWAS.
1289 * Note: Only clients that have been connected at least 30 seconds will be
1290 * registered to prevent automated IRC bots to "destroy" a nice server
1294 Client_RegisterWhowas( CLIENT *Client )
1299 assert( Client != NULL );
1301 /* Don't register WHOWAS information when "MorePrivacy" is enabled. */
1302 if (Conf_MorePrivacy)
1306 /* Don't register clients that were connected less than 30 seconds. */
1307 if( now - Client->starttime < 30 )
1310 slot = Last_Whowas + 1;
1311 if( slot >= MAX_WHOWAS || slot < 0 ) slot = 0;
1314 Log( LOG_DEBUG, "Saving WHOWAS information to slot %d ...", slot );
1317 My_Whowas[slot].time = now;
1318 strlcpy( My_Whowas[slot].id, Client_ID( Client ),
1319 sizeof( My_Whowas[slot].id ));
1320 strlcpy( My_Whowas[slot].user, Client_User( Client ),
1321 sizeof( My_Whowas[slot].user ));
1322 strlcpy( My_Whowas[slot].host, Client_HostnameCloaked( Client ),
1323 sizeof( My_Whowas[slot].host ));
1324 strlcpy( My_Whowas[slot].info, Client_Info( Client ),
1325 sizeof( My_Whowas[slot].info ));
1326 strlcpy( My_Whowas[slot].server, Client_ID( Client_Introducer( Client )),
1327 sizeof( My_Whowas[slot].server ));
1330 } /* Client_RegisterWhowas */
1334 Client_TypeText(CLIENT *Client)
1336 assert(Client != NULL);
1337 switch (Client_Type(Client)) {
1341 case CLIENT_SERVICE:
1350 } /* Client_TypeText */
1354 * Destroy user or service client.
1357 Destroy_UserOrService(CLIENT *Client, const char *Txt, const char *FwdMsg, bool SendQuit)
1359 if(Client->conn_id != NONE) {
1360 /* Local (directly connected) client */
1362 "%s \"%s\" unregistered (connection %d): %s",
1363 Client_TypeText(Client), Client_Mask(Client),
1364 Client->conn_id, Txt);
1365 Log_ServerNotice('c', "Client exiting: %s (%s@%s) [%s]",
1366 Client_ID(Client), Client_User(Client),
1367 Client_Hostname(Client), Txt);
1370 /* Inforam all the other servers */
1372 IRC_WriteStrServersPrefix(NULL,
1373 Client, "QUIT :%s", FwdMsg );
1375 IRC_WriteStrServersPrefix(NULL,
1380 LogDebug("%s \"%s\" unregistered: %s",
1381 Client_TypeText(Client), Client_Mask(Client), Txt);
1384 /* Inform all the other servers, but the ones in the
1385 * direction we got the QUIT from */
1387 IRC_WriteStrServersPrefix(Client_NextHop(Client),
1388 Client, "QUIT :%s", FwdMsg );
1390 IRC_WriteStrServersPrefix(Client_NextHop(Client),
1395 /* Unregister client from channels */
1396 Channel_Quit(Client, FwdMsg ? FwdMsg : Client->id);
1398 /* Register client in My_Whowas structure */
1399 Client_RegisterWhowas(Client);
1400 } /* Destroy_UserOrService */
1404 * Introduce a new user or service client to a remote server.
1406 * This function differentiates between RFC1459 and RFC2813 server links and
1407 * generates the appropriate commands to register the new user or service.
1409 * @param To The remote server to inform.
1410 * @param Prefix Prefix for the generated commands.
1411 * @param data CLIENT structure of the new client.
1414 cb_introduceClient(CLIENT *To, CLIENT *Prefix, void *data)
1416 CLIENT *c = (CLIENT *)data;
1418 char *modes, *user, *host;
1420 modes = Client_Modes(c);
1421 user = Client_User(c) ? Client_User(c) : "-";
1422 host = Client_Hostname(c) ? Client_Hostname(c) : "-";
1424 conn = Client_Conn(To);
1425 if (Conn_Options(conn) & CONN_RFC1459) {
1426 /* RFC 1459 mode: separate NICK and USER commands */
1427 Conn_WriteStr(conn, "NICK %s :%d", Client_ID(c),
1428 Client_Hops(c) + 1);
1429 Conn_WriteStr(conn, ":%s USER %s %s %s :%s",
1430 Client_ID(c), user, host,
1431 Client_ID(Client_Introducer(c)), Client_Info(c));
1433 Conn_WriteStr(conn, ":%s MODE %s +%s",
1434 Client_ID(c), Client_ID(c), modes);
1436 /* RFC 2813 mode: one combined NICK or SERVICE command */
1437 if (Client_Type(c) == CLIENT_SERVICE
1438 && strchr(Client_Flags(To), 'S'))
1439 IRC_WriteStrClientPrefix(To, Prefix,
1440 "SERVICE %s %d * +%s %d :%s",
1442 Client_MyToken(Client_Introducer(c)),
1443 Client_Modes(c), Client_Hops(c) + 1,
1446 IRC_WriteStrClientPrefix(To, Prefix,
1447 "NICK %s %d %s %s %d +%s :%s",
1448 Client_ID(c), Client_Hops(c) + 1,
1450 Client_MyToken(Client_Introducer(c)),
1451 modes, Client_Info(c));
1453 } /* cb_introduceClient */
1459 Client_DebugDump(void)
1463 Log(LOG_DEBUG, "Client status:");
1467 " - %s: type=%d, host=%s, user=%s, conn=%d, start=%ld, flags=%s",
1468 Client_ID(c), Client_Type(c), Client_Hostname(c),
1469 Client_User(c), Client_Conn(c), Client_StartTime(c),
1471 c = (CLIENT *)c->next;
1473 } /* Client_DumpClients */