2 * ngIRCd -- The Next Generation IRC Daemon
3 * Copyright (c)2001-2012 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 txt = LogMsg ? LogMsg : FwdMsg;
244 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) {
285 if (c->conn_id != NONE)
286 Log(LOG_NOTICE|LOG_snotice,
287 "Server \"%s\" unregistered (connection %d): %s.",
288 c->id, c->conn_id, txt);
290 Log(LOG_NOTICE|LOG_snotice,
291 "Server \"%s\" unregistered: %s.",
295 /* inform other servers */
296 if( ! NGIRCd_SignalQuit )
298 if( FwdMsg ) IRC_WriteStrServersPrefix( Client_NextHop( c ), c, "SQUIT %s :%s", c->id, FwdMsg );
299 else IRC_WriteStrServersPrefix( Client_NextHop( c ), c, "SQUIT %s :", c->id );
304 if (c->conn_id != NONE) {
307 "Client \"%s\" unregistered (connection %d): %s.",
308 c->id, c->conn_id, txt);
311 "Client unregistered (connection %d): %s.",
315 "Unregistered unknown client \"%s\": %s",
316 c->id[0] ? c->id : "(No Nick)", txt);
324 c = (CLIENT *)c->next;
326 } /* Client_Destroy */
330 * Set client hostname.
332 * If global hostname cloaking is in effect, don't set the real hostname
333 * but the configured one.
335 * @param Client The client of which the hostname should be set.
336 * @param Hostname The new hostname.
339 Client_SetHostname( CLIENT *Client, const char *Hostname )
341 assert(Client != NULL);
342 assert(Hostname != NULL);
344 if (strlen(Conf_CloakHost)) {
345 char cloak[GETID_LEN];
347 strlcpy(cloak, Hostname, GETID_LEN);
348 strlcat(cloak, Conf_CloakHostSalt, GETID_LEN);
349 snprintf(cloak, GETID_LEN, Conf_CloakHost, Hash(cloak));
351 LogDebug("Updating hostname of \"%s\": \"%s\" -> \"%s\"",
352 Client_ID(Client), Client->host, cloak);
353 strlcpy(Client->host, cloak, sizeof(Client->host));
355 LogDebug("Updating hostname of \"%s\": \"%s\" -> \"%s\"",
356 Client_ID(Client), Client->host, Hostname);
357 strlcpy(Client->host, Hostname, sizeof(Client->host));
359 } /* Client_SetHostname */
363 Client_SetID( CLIENT *Client, const char *ID )
365 assert( Client != NULL );
366 assert( ID != NULL );
368 strlcpy( Client->id, ID, sizeof( Client->id ));
370 if (Conf_CloakUserToNick) {
371 strlcpy( Client->user, ID, sizeof( Client->user ));
372 strlcpy( Client->info, ID, sizeof( Client->info ));
376 Client->hash = Hash( Client->id );
381 Client_SetUser( CLIENT *Client, const char *User, bool Idented )
383 /* set clients username */
385 assert( Client != NULL );
386 assert( User != NULL );
388 if (Conf_CloakUserToNick) {
389 strlcpy(Client->user, Client->id, sizeof(Client->user));
390 } else if (Idented) {
391 strlcpy(Client->user, User, sizeof(Client->user));
393 Client->user[0] = '~';
394 strlcpy(Client->user + 1, User, sizeof(Client->user) - 1);
396 } /* Client_SetUser */
400 * Set "original" user name of a client.
401 * This function saves the "original" user name, the user name specified by
402 * the peer using the USER command, into the CLIENT structure. This user
403 * name may be used for authentication, for example.
404 * @param Client The client.
405 * @param User User name to set.
408 Client_SetOrigUser(CLIENT UNUSED *Client, const char UNUSED *User)
410 assert(Client != NULL);
411 assert(User != NULL);
413 #if defined(PAM) && defined(IDENTAUTH)
414 strlcpy(Client->orig_user, User, sizeof(Client->orig_user));
416 } /* Client_SetOrigUser */
420 Client_SetInfo( CLIENT *Client, const char *Info )
422 /* set client hostname */
424 assert( Client != NULL );
425 assert( Info != NULL );
427 if (Conf_CloakUserToNick)
428 strlcpy(Client->info, Client->id, sizeof(Client->info));
430 strlcpy(Client->info, Info, sizeof(Client->info));
431 } /* Client_SetInfo */
435 Client_SetModes( CLIENT *Client, const char *Modes )
437 assert( Client != NULL );
438 assert( Modes != NULL );
440 strlcpy(Client->modes, Modes, sizeof( Client->modes ));
441 } /* Client_SetModes */
445 Client_SetFlags( CLIENT *Client, const char *Flags )
447 assert( Client != NULL );
448 assert( Flags != NULL );
450 strlcpy(Client->flags, Flags, sizeof(Client->flags));
451 } /* Client_SetFlags */
455 Client_SetAway( CLIENT *Client, const char *Txt )
457 /* Set AWAY reason of client */
459 assert( Client != NULL );
460 assert( Txt != NULL );
462 strlcpy( Client->away, Txt, sizeof( Client->away ));
463 LogDebug("%s \"%s\" is away: %s", Client_TypeText(Client),
464 Client_Mask(Client), Txt);
465 } /* Client_SetAway */
469 Client_SetType( CLIENT *Client, int Type )
471 assert( Client != NULL );
473 if( Type == CLIENT_SERVER ) Generate_MyToken( Client );
474 Adjust_Counters( Client );
475 } /* Client_SetType */
479 Client_SetHops( CLIENT *Client, int Hops )
481 assert( Client != NULL );
483 } /* Client_SetHops */
487 Client_SetToken( CLIENT *Client, int Token )
489 assert( Client != NULL );
490 Client->token = Token;
491 } /* Client_SetToken */
495 Client_SetIntroducer( CLIENT *Client, CLIENT *Introducer )
497 assert( Client != NULL );
498 assert( Introducer != NULL );
499 Client->introducer = Introducer;
500 } /* Client_SetIntroducer */
504 Client_SetOperByMe( CLIENT *Client, bool OperByMe )
506 assert( Client != NULL );
507 Client->oper_by_me = OperByMe;
508 } /* Client_SetOperByMe */
512 Client_ModeAdd( CLIENT *Client, char Mode )
515 * If Client already alread had Mode, return false.
516 * If the Mode was newly set, return true.
521 assert( Client != NULL );
523 x[0] = Mode; x[1] = '\0';
524 if (!strchr( Client->modes, x[0])) {
525 strlcat( Client->modes, x, sizeof( Client->modes ));
529 } /* Client_ModeAdd */
533 Client_ModeDel( CLIENT *Client, char Mode )
536 * If Mode was removed, return true.
537 * If Client did not have Mode, return false.
542 assert( Client != NULL );
544 x[0] = Mode; x[1] = '\0';
546 p = strchr( Client->modes, x[0] );
547 if( ! p ) return false;
549 /* Client has Mode -> delete */
556 } /* Client_ModeDel */
560 Client_Search( const char *Nick )
562 /* return Client-Structure that has the corresponding Nick.
563 * If none is found, return NULL.
566 char search_id[CLIENT_ID_LEN], *ptr;
570 assert( Nick != NULL );
572 /* copy Nick and truncate hostmask if necessary */
573 strlcpy( search_id, Nick, sizeof( search_id ));
574 ptr = strchr( search_id, '!' );
575 if( ptr ) *ptr = '\0';
577 search_hash = Hash(search_id);
581 if (c->hash == search_hash && strcasecmp(c->id, search_id) == 0)
583 c = (CLIENT *)c->next;
586 } /* Client_Search */
590 * Get client structure ("introducer") identfied by a server token.
591 * @return CLIENT structure or NULL if none could be found.
594 Client_GetFromToken( CLIENT *Client, int Token )
598 assert( Client != NULL );
605 if ((c->type == CLIENT_SERVER) && (c->introducer == Client) &&
608 c = (CLIENT *)c->next;
611 } /* Client_GetFromToken */
615 Client_Type( CLIENT *Client )
617 assert( Client != NULL );
623 Client_Conn( CLIENT *Client )
625 assert( Client != NULL );
626 return Client->conn_id;
631 Client_ID( CLIENT *Client )
633 assert( Client != NULL );
636 if(Client->type == CLIENT_USER)
637 assert(strlen(Client->id) < Conf_MaxNickLength);
640 if( Client->id[0] ) return Client->id;
646 Client_Info( CLIENT *Client )
648 assert( Client != NULL );
654 Client_User( CLIENT *Client )
656 assert( Client != NULL );
657 return Client->user[0] ? Client->user : "~";
664 * Get the "original" user name as supplied by the USER command.
665 * The user name as given by the client is used for authentication instead
666 * of the one detected using IDENT requests.
667 * @param Client The client.
668 * @return Original user name.
671 Client_OrigUser(CLIENT *Client) {
673 char *user = Client->user;
679 return Client->orig_user;
681 } /* Client_OrigUser */
686 * Return the hostname of a client.
687 * @param Client Pointer to client structure
688 * @return Pointer to client hostname
691 Client_Hostname(CLIENT *Client)
693 assert (Client != NULL);
698 * Return the cloaked hostname of a client, if set.
699 * @param Client Pointer to the client structure.
700 * @return Pointer to the cloaked hostname or NULL if not set.
703 Client_HostnameCloaked(CLIENT *Client)
705 assert(Client != NULL);
706 return Client->cloaked;
710 * Get (potentially cloaked) hostname of a client to display it to other users.
712 * If the client has not enabled cloaking, the real hostname is used.
713 * Please note that this function uses a global static buffer, so you can't
714 * nest invocations without overwriting earlier results!
716 * @param Client Pointer to client structure
717 * @return Pointer to client hostname
720 Client_HostnameDisplayed(CLIENT *Client)
722 assert(Client != NULL);
724 /* Client isn't cloaked at all, return real hostname: */
725 if (!Client_HasMode(Client, 'x'))
726 return Client_Hostname(Client);
728 /* Use an already saved cloaked hostname, if there is one */
729 if (Client->cloaked[0])
730 return Client->cloaked;
732 Client_UpdateCloakedHostname(Client, NULL, NULL);
733 return Client->cloaked;
737 * Update (and generate, if necessary) the cloaked hostname of a client.
739 * The newly set cloaked hostname is announced in the network using METADATA
740 * commands to peers that support this feature.
742 * @param Client The client of which the cloaked hostname should be updated.
743 * @param Origin The originator of the hostname change, or NULL if this server.
744 * @param Hostname The new cloaked hostname, or NULL if it should be generated.
747 Client_UpdateCloakedHostname(CLIENT *Client, CLIENT *Origin,
748 const char *Hostname)
750 static char Cloak_Buffer[CLIENT_HOST_LEN];
752 assert(Client != NULL);
754 Origin = Client_ThisServer();
757 /* Generate new cloaked hostname */
758 if (*Conf_CloakHostModeX) {
759 strlcpy(Cloak_Buffer, Client->host, CLIENT_HOST_LEN);
760 strlcat(Cloak_Buffer, Conf_CloakHostSalt,
762 snprintf(Client->cloaked, sizeof(Client->cloaked),
763 Conf_CloakHostModeX, Hash(Cloak_Buffer));
765 strlcpy(Client->cloaked, Client_ID(Client->introducer),
766 sizeof(Client->cloaked));
768 strlcpy(Client->cloaked, Hostname, sizeof(Client->cloaked));
769 LogDebug("Cloaked hostname of \"%s\" updated to \"%s\"",
770 Client_ID(Client), Client->cloaked);
772 /* Inform other servers in the network */
773 IRC_WriteStrServersPrefixFlag(Client_NextHop(Origin), Origin, 'M',
774 "METADATA %s cloakhost :%s",
775 Client_ID(Client), Client->cloaked);
779 Client_Modes( CLIENT *Client )
781 assert( Client != NULL );
782 return Client->modes;
787 Client_Flags( CLIENT *Client )
789 assert( Client != NULL );
790 return Client->flags;
795 Client_OperByMe( CLIENT *Client )
797 assert( Client != NULL );
798 return Client->oper_by_me;
799 } /* Client_OperByMe */
803 Client_Hops( CLIENT *Client )
805 assert( Client != NULL );
811 Client_Token( CLIENT *Client )
813 assert( Client != NULL );
814 return Client->token;
819 Client_MyToken( CLIENT *Client )
821 assert( Client != NULL );
822 return Client->mytoken;
823 } /* Client_MyToken */
827 Client_NextHop( CLIENT *Client )
831 assert( Client != NULL );
834 while( c->introducer && ( c->introducer != c ) && ( c->introducer != This_Server ))
838 } /* Client_NextHop */
842 * Return ID of a client: "client!user@host"
843 * This client ID is used for IRC prefixes, for example.
844 * Please note that this function uses a global static buffer, so you can't
845 * nest invocations without overwriting earlier results!
846 * @param Client Pointer to client structure
847 * @return Pointer to global buffer containing the client ID
850 Client_Mask( CLIENT *Client )
852 static char Mask_Buffer[GETID_LEN];
854 assert (Client != NULL);
856 /* Servers: return name only, there is no "mask" */
857 if (Client->type == CLIENT_SERVER)
860 snprintf(Mask_Buffer, GETID_LEN, "%s!%s@%s",
861 Client->id, Client->user, Client->host);
867 * Return ID of a client with cloaked hostname: "client!user@server-name"
869 * This client ID is used for IRC prefixes, for example.
870 * Please note that this function uses a global static buffer, so you can't
871 * nest invocations without overwriting earlier results!
872 * If the client has not enabled cloaking, the real hostname is used.
874 * @param Client Pointer to client structure
875 * @return Pointer to global buffer containing the client ID
878 Client_MaskCloaked(CLIENT *Client)
880 static char Mask_Buffer[GETID_LEN];
882 assert (Client != NULL);
884 /* Is the client using cloaking at all? */
885 if (!Client_HasMode(Client, 'x'))
886 return Client_Mask(Client);
888 snprintf(Mask_Buffer, GETID_LEN, "%s!%s@%s", Client->id, Client->user,
889 Client_HostnameDisplayed(Client));
892 } /* Client_MaskCloaked */
896 Client_Introducer( CLIENT *Client )
898 assert( Client != NULL );
899 return Client->introducer;
900 } /* Client_Introducer */
904 Client_TopServer( CLIENT *Client )
906 assert( Client != NULL );
907 return Client->topserver;
908 } /* Client_TopServer */
912 Client_HasMode( CLIENT *Client, char Mode )
914 assert( Client != NULL );
915 return strchr( Client->modes, Mode ) != NULL;
916 } /* Client_HasMode */
920 Client_Away( CLIENT *Client )
922 assert( Client != NULL );
928 * Make sure that a given nickname is valid.
930 * If the nickname is not valid for the given client, this function sends back
931 * the appropriate error messages.
933 * @param Client Client that wants to change the nickname.
934 * @param Nick New nickname.
935 * @returns true if nickname is valid, false otherwise.
938 Client_CheckNick(CLIENT *Client, char *Nick)
940 assert(Client != NULL);
941 assert(Nick != NULL);
943 if (!Client_IsValidNick(Nick)) {
944 if (strlen(Nick ) >= Conf_MaxNickLength)
945 IRC_WriteStrClient(Client, ERR_NICKNAMETOOLONG_MSG,
946 Client_ID(Client), Nick,
947 Conf_MaxNickLength - 1);
949 IRC_WriteStrClient(Client, ERR_ERRONEUSNICKNAME_MSG,
950 Client_ID(Client), Nick);
954 if (Client_Type(Client) != CLIENT_SERVER
955 && Client_Type(Client) != CLIENT_SERVICE) {
956 /* Make sure that this isn't a restricted/forbidden nickname */
957 if (Conf_NickIsBlocked(Nick)) {
958 IRC_WriteStrClient(Client, ERR_FORBIDDENNICKNAME_MSG,
959 Client_ID(Client), Nick);
964 /* Nickname already registered? */
965 if (Client_Search(Nick)) {
966 IRC_WriteStrClient(Client, ERR_NICKNAMEINUSE_MSG,
967 Client_ID(Client), Nick);
972 } /* Client_CheckNick */
976 Client_CheckID( CLIENT *Client, char *ID )
978 char str[COMMAND_LEN];
981 assert( Client != NULL );
982 assert( Client->conn_id > NONE );
983 assert( ID != NULL );
986 if (strlen(ID) > CLIENT_ID_LEN) {
987 IRC_WriteStrClient(Client, ERR_ERRONEUSNICKNAME_MSG, Client_ID(Client), ID);
991 /* ID already in use? */
994 if (strcasecmp(c->id, ID) == 0) {
995 snprintf(str, sizeof(str), "ID \"%s\" already registered", ID);
996 if (c->conn_id != NONE)
997 Log(LOG_ERR, "%s (on connection %d)!", str, c->conn_id);
999 Log(LOG_ERR, "%s (via network)!", str);
1000 Conn_Close(Client->conn_id, str, str, true);
1003 c = (CLIENT *)c->next;
1007 } /* Client_CheckID */
1011 Client_First( void )
1014 } /* Client_First */
1018 Client_Next( CLIENT *c )
1020 assert( c != NULL );
1021 return (CLIENT *)c->next;
1026 Client_UserCount( void )
1028 return Count( CLIENT_USER );
1029 } /* Client_UserCount */
1033 Client_ServiceCount( void )
1035 return Count( CLIENT_SERVICE );;
1036 } /* Client_ServiceCount */
1040 Client_ServerCount( void )
1042 return Count( CLIENT_SERVER );
1043 } /* Client_ServerCount */
1047 Client_MyUserCount( void )
1049 return MyCount( CLIENT_USER );
1050 } /* Client_MyUserCount */
1054 Client_MyServiceCount( void )
1056 return MyCount( CLIENT_SERVICE );
1057 } /* Client_MyServiceCount */
1060 GLOBAL unsigned long
1061 Client_MyServerCount( void )
1064 unsigned long cnt = 0;
1069 if(( c->type == CLIENT_SERVER ) && ( c->hops == 1 )) cnt++;
1070 c = (CLIENT *)c->next;
1073 } /* Client_MyServerCount */
1076 GLOBAL unsigned long
1077 Client_OperCount( void )
1080 unsigned long cnt = 0;
1085 if( c && ( c->type == CLIENT_USER ) && ( strchr( c->modes, 'o' ))) cnt++;
1086 c = (CLIENT *)c->next;
1089 } /* Client_OperCount */
1092 GLOBAL unsigned long
1093 Client_UnknownCount( void )
1096 unsigned long cnt = 0;
1101 if( c && ( c->type != CLIENT_USER ) && ( c->type != CLIENT_SERVICE ) && ( c->type != CLIENT_SERVER )) cnt++;
1102 c = (CLIENT *)c->next;
1106 } /* Client_UnknownCount */
1110 Client_MaxUserCount( void )
1113 } /* Client_MaxUserCount */
1117 Client_MyMaxUserCount( void )
1119 return My_Max_Users;
1120 } /* Client_MyMaxUserCount */
1124 * Check that a given nickname is valid.
1126 * @param Nick the nickname to check.
1127 * @returns true if nickname is valid, false otherwise.
1130 Client_IsValidNick(const char *Nick)
1133 static const char goodchars[] = ";0123456789-";
1135 assert (Nick != NULL);
1137 if (strchr(goodchars, Nick[0]))
1139 if (strlen(Nick ) >= Conf_MaxNickLength)
1144 if (*ptr < 'A' && !strchr(goodchars, *ptr ))
1152 } /* Client_IsValidNick */
1156 * Return pointer to "My_Whowas" structure.
1159 Client_GetWhowas( void )
1162 } /* Client_GetWhowas */
1165 * Return the index of the last used WHOWAS entry.
1168 Client_GetLastWhowasIndex( void )
1171 } /* Client_GetLastWhowasIndex */
1175 * Get the start time of this client.
1176 * The result is the start time in seconds since 1970-01-01, as reported
1177 * by the C function time(NULL).
1180 Client_StartTime(CLIENT *Client)
1182 assert( Client != NULL );
1183 return Client->starttime;
1184 } /* Client_Uptime */
1188 * Reject a client when logging in.
1190 * This function is called when a client isn't allowed to connect to this
1191 * server. Possible reasons are bad server password, bad PAM password,
1192 * or that the client is G/K-Line'd.
1194 * After calling this function, the client isn't connected any more.
1196 * @param Client The client to reject.
1197 * @param Reason The reason why the client has been rejected.
1198 * @param InformClient If true, send the exact reason to the client.
1201 Client_Reject(CLIENT *Client, const char *Reason, bool InformClient)
1203 char info[COMMAND_LEN];
1205 assert(Client != NULL);
1206 assert(Reason != NULL);
1209 snprintf(info, sizeof(info), "Access denied: %s", Reason);
1211 strcpy(info, "Access denied: Bad password?");
1214 "User \"%s\" rejected (connection %d): %s!",
1215 Client_Mask(Client), Client_Conn(Client), Reason);
1216 Conn_Close(Client_Conn(Client), Reason, info, true);
1221 * Introduce a new user or service client in the network.
1223 * @param From Remote server introducing the client or NULL (local).
1224 * @param Client New client.
1225 * @param Type Type of the client (CLIENT_USER or CLIENT_SERVICE).
1228 Client_Introduce(CLIENT *From, CLIENT *Client, int Type)
1230 /* Set client type (user or service) */
1231 Client_SetType(Client, Type);
1234 if (Conf_NickIsService(Conf_GetServer(Client_Conn(From)),
1236 Client_SetType(Client, CLIENT_SERVICE);
1237 LogDebug("%s \"%s\" (+%s) registered (via %s, on %s, %d hop%s).",
1238 Client_TypeText(Client), Client_Mask(Client),
1239 Client_Modes(Client), Client_ID(From),
1240 Client_ID(Client_Introducer(Client)),
1241 Client_Hops(Client), Client_Hops(Client) > 1 ? "s": "");
1243 Log(LOG_NOTICE, "%s \"%s\" registered (connection %d).",
1244 Client_TypeText(Client), Client_Mask(Client),
1245 Client_Conn(Client));
1246 Log_ServerNotice('c', "Client connecting: %s (%s@%s) [%s] - %s",
1247 Client_ID(Client), Client_User(Client),
1248 Client_Hostname(Client),
1249 Conn_IPA(Client_Conn(Client)),
1250 Client_TypeText(Client));
1253 /* Inform other servers */
1254 IRC_WriteStrServersPrefixFlag_CB(From,
1255 From != NULL ? From : Client_ThisServer(),
1256 '\0', cb_introduceClient, (void *)Client);
1257 } /* Client_Introduce */
1260 static unsigned long
1261 Count( CLIENT_TYPE Type )
1264 unsigned long cnt = 0;
1269 if( c->type == Type ) cnt++;
1270 c = (CLIENT *)c->next;
1276 static unsigned long
1277 MyCount( CLIENT_TYPE Type )
1280 unsigned long cnt = 0;
1285 if(( c->introducer == This_Server ) && ( c->type == Type )) cnt++;
1286 c = (CLIENT *)c->next;
1293 New_Client_Struct( void )
1295 /* Neue CLIENT-Struktur pre-initialisieren */
1299 c = (CLIENT *)malloc( sizeof( CLIENT ));
1302 Log( LOG_EMERG, "Can't allocate memory! [New_Client_Struct]" );
1306 memset( c, 0, sizeof ( CLIENT ));
1308 c->type = CLIENT_UNKNOWN;
1310 c->oper_by_me = false;
1320 Generate_MyToken( CLIENT *Client )
1329 if( c->mytoken == token )
1331 /* Das Token wurde bereits vergeben */
1336 else c = (CLIENT *)c->next;
1338 Client->mytoken = token;
1339 LogDebug("Assigned token %d to server \"%s\".", token, Client->id);
1340 } /* Generate_MyToken */
1344 Adjust_Counters( CLIENT *Client )
1348 assert( Client != NULL );
1350 if( Client->type != CLIENT_USER ) return;
1352 if( Client->conn_id != NONE )
1354 /* Local connection */
1355 count = Client_MyUserCount( );
1356 if( count > My_Max_Users ) My_Max_Users = count;
1358 count = Client_UserCount( );
1359 if( count > Max_Users ) Max_Users = count;
1360 } /* Adjust_Counters */
1364 * Register client in My_Whowas structure for further recall by WHOWAS.
1365 * Note: Only clients that have been connected at least 30 seconds will be
1366 * registered to prevent automated IRC bots to "destroy" a nice server
1370 Client_RegisterWhowas( CLIENT *Client )
1375 assert( Client != NULL );
1377 /* Don't register WHOWAS information when "MorePrivacy" is enabled. */
1378 if (Conf_MorePrivacy)
1382 /* Don't register clients that were connected less than 30 seconds. */
1383 if( now - Client->starttime < 30 )
1386 slot = Last_Whowas + 1;
1387 if( slot >= MAX_WHOWAS || slot < 0 ) slot = 0;
1390 Log( LOG_DEBUG, "Saving WHOWAS information to slot %d ...", slot );
1393 My_Whowas[slot].time = now;
1394 strlcpy( My_Whowas[slot].id, Client_ID( Client ),
1395 sizeof( My_Whowas[slot].id ));
1396 strlcpy( My_Whowas[slot].user, Client_User( Client ),
1397 sizeof( My_Whowas[slot].user ));
1398 strlcpy( My_Whowas[slot].host, Client_HostnameDisplayed( Client ),
1399 sizeof( My_Whowas[slot].host ));
1400 strlcpy( My_Whowas[slot].info, Client_Info( Client ),
1401 sizeof( My_Whowas[slot].info ));
1402 strlcpy( My_Whowas[slot].server, Client_ID( Client_Introducer( Client )),
1403 sizeof( My_Whowas[slot].server ));
1406 } /* Client_RegisterWhowas */
1410 Client_TypeText(CLIENT *Client)
1412 assert(Client != NULL);
1413 switch (Client_Type(Client)) {
1417 case CLIENT_SERVICE:
1426 } /* Client_TypeText */
1430 * Destroy user or service client.
1433 Destroy_UserOrService(CLIENT *Client, const char *Txt, const char *FwdMsg, bool SendQuit)
1435 if(Client->conn_id != NONE) {
1436 /* Local (directly connected) client */
1438 "%s \"%s\" unregistered (connection %d): %s.",
1439 Client_TypeText(Client), Client_Mask(Client),
1440 Client->conn_id, Txt);
1441 Log_ServerNotice('c', "Client exiting: %s (%s@%s) [%s]",
1442 Client_ID(Client), Client_User(Client),
1443 Client_Hostname(Client), Txt);
1446 /* Inforam all the other servers */
1448 IRC_WriteStrServersPrefix(NULL,
1449 Client, "QUIT :%s", FwdMsg );
1451 IRC_WriteStrServersPrefix(NULL,
1456 LogDebug("%s \"%s\" unregistered: %s.",
1457 Client_TypeText(Client), Client_Mask(Client), Txt);
1460 /* Inform all the other servers, but the ones in the
1461 * direction we got the QUIT from */
1463 IRC_WriteStrServersPrefix(Client_NextHop(Client),
1464 Client, "QUIT :%s", FwdMsg );
1466 IRC_WriteStrServersPrefix(Client_NextHop(Client),
1471 /* Unregister client from channels */
1472 Channel_Quit(Client, FwdMsg ? FwdMsg : Client->id);
1474 /* Register client in My_Whowas structure */
1475 Client_RegisterWhowas(Client);
1476 } /* Destroy_UserOrService */
1480 * Introduce a new user or service client to a remote server.
1482 * This function differentiates between RFC1459 and RFC2813 server links and
1483 * generates the appropriate commands to register the new user or service.
1485 * @param To The remote server to inform.
1486 * @param Prefix Prefix for the generated commands.
1487 * @param data CLIENT structure of the new client.
1490 cb_introduceClient(CLIENT *To, CLIENT *Prefix, void *data)
1492 CLIENT *c = (CLIENT *)data;
1494 char *modes, *user, *host;
1496 modes = Client_Modes(c);
1497 user = Client_User(c) ? Client_User(c) : "-";
1498 host = Client_Hostname(c) ? Client_Hostname(c) : "-";
1500 conn = Client_Conn(To);
1501 if (Conn_Options(conn) & CONN_RFC1459) {
1502 /* RFC 1459 mode: separate NICK and USER commands */
1503 Conn_WriteStr(conn, "NICK %s :%d", Client_ID(c),
1504 Client_Hops(c) + 1);
1505 Conn_WriteStr(conn, ":%s USER %s %s %s :%s",
1506 Client_ID(c), user, host,
1507 Client_ID(Client_Introducer(c)), Client_Info(c));
1509 Conn_WriteStr(conn, ":%s MODE %s +%s",
1510 Client_ID(c), Client_ID(c), modes);
1512 /* RFC 2813 mode: one combined NICK or SERVICE command */
1513 if (Client_Type(c) == CLIENT_SERVICE
1514 && strchr(Client_Flags(To), 'S'))
1515 IRC_WriteStrClientPrefix(To, Prefix,
1516 "SERVICE %s %d * +%s %d :%s",
1518 Client_MyToken(Client_Introducer(c)),
1519 Client_Modes(c), Client_Hops(c) + 1,
1522 IRC_WriteStrClientPrefix(To, Prefix,
1523 "NICK %s %d %s %s %d +%s :%s",
1524 Client_ID(c), Client_Hops(c) + 1,
1526 Client_MyToken(Client_Introducer(c)),
1527 modes, Client_Info(c));
1529 } /* cb_introduceClient */
1535 Client_DebugDump(void)
1539 Log(LOG_DEBUG, "Client status:");
1543 " - %s: type=%d, host=%s, user=%s, conn=%d, start=%ld, flags=%s",
1544 Client_ID(c), Client_Type(c), Client_Hostname(c),
1545 Client_User(c), Client_Conn(c), Client_StartTime(c),
1547 c = (CLIENT *)c->next;
1549 } /* Client_DumpClients */