X-Git-Url: https://arthur.barton.de/cgi-bin/gitweb.cgi?p=ngircd-alex.git;a=blobdiff_plain;f=src%2Fngircd%2Firc-login.c;h=92d54ab15e42ad64d2e7d05bd605bccc1cd7f734;hp=1cc595822952b69744a75246dbb1381eff2225a0;hb=fa8b83e69b0d7edcfdcf8f0a4496c79f9c5ec161;hpb=51dabeafaa1dfab6bde2043ee2e5024f14f72780 diff --git a/src/ngircd/irc-login.c b/src/ngircd/irc-login.c index 1cc59582..92d54ab1 100644 --- a/src/ngircd/irc-login.c +++ b/src/ngircd/irc-login.c @@ -1,245 +1,363 @@ /* * ngIRCd -- The Next Generation IRC Daemon - * Copyright (c)2001,2002 by Alexander Barton (alex@barton.de) + * Copyright (c)2001-2010 Alexander Barton (alex@barton.de) * - * Dieses Programm ist freie Software. Sie koennen es unter den Bedingungen - * der GNU General Public License (GPL), wie von der Free Software Foundation - * herausgegeben, weitergeben und/oder modifizieren, entweder unter Version 2 - * der Lizenz oder (wenn Sie es wuenschen) jeder spaeteren Version. - * Naehere Informationen entnehmen Sie bitter der Datei COPYING. Eine Liste - * der an ngIRCd beteiligten Autoren finden Sie in der Datei AUTHORS. - * - * $Id: irc-login.c,v 1.21 2002/09/09 03:34:33 alex Exp $ - * - * irc-login.c: Anmeldung und Abmeldung im IRC + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * Please read the file COPYING, README and AUTHORS for more information. */ - #include "portab.h" +/** + * @file + * Login and logout + */ + #include "imp.h" #include #include #include #include +#include +#include +#include #include "ngircd.h" -#include "resolve.h" +#include "conn-func.h" #include "conf.h" -#include "conn.h" -#include "client.h" #include "channel.h" +#include "io.h" #include "log.h" #include "messages.h" +#include "pam.h" #include "parse.h" #include "irc.h" +#include "irc-info.h" #include "irc-write.h" #include "exp.h" #include "irc-login.h" -LOCAL BOOLEAN Hello_User PARAMS(( CLIENT *Client )); -LOCAL VOID Kill_Nick PARAMS(( CHAR *Nick, CHAR *Reason )); +static bool Hello_User PARAMS(( CLIENT *Client )); +static bool Hello_User_PostAuth PARAMS(( CLIENT *Client )); +static void Kill_Nick PARAMS(( char *Nick, char *Reason )); +static void Introduce_Client PARAMS((CLIENT *To, CLIENT *Client, int Type)); +static void Reject_Client PARAMS((CLIENT *Client)); + +static void cb_introduceClient PARAMS((CLIENT *Client, CLIENT *Prefix, + void *i)); +#ifdef PAM +static void cb_Read_Auth_Result PARAMS((int r_fd, UNUSED short events)); +#endif -GLOBAL BOOLEAN +/** + * Handler for the IRC "PASS" command. + * + * See RFC 2813 section 4.1.1, and RFC 2812 section 3.1.1. + * + * @param Client The client from which this command has been received. + * @param Req Request structure with prefix and all parameters. + * @returns CONNECTED or DISCONNECTED. + */ +GLOBAL bool IRC_PASS( CLIENT *Client, REQUEST *Req ) { + char *type, *orig_flags; + int protohigh, protolow; + assert( Client != NULL ); assert( Req != NULL ); - /* Fehler liefern, wenn kein lokaler Client */ - if( Client_Conn( Client ) <= NONE ) return IRC_WriteStrClient( Client, ERR_UNKNOWNCOMMAND_MSG, Client_ID( Client ), Req->command ); - - if(( Client_Type( Client ) == CLIENT_UNKNOWN ) && ( Req->argc == 1)) - { - /* noch nicht registrierte unbekannte Verbindung */ - Log( LOG_DEBUG, "Connection %d: got PASS command ...", Client_Conn( Client )); + /* Return an error if this is not a local client */ + if (Client_Conn(Client) <= NONE) + return IRC_WriteStrClient(Client, ERR_UNKNOWNCOMMAND_MSG, + Client_ID(Client), Req->command); + + if (Client_Type(Client) == CLIENT_UNKNOWN && Req->argc == 1) { + /* Not yet registered "unknown" connection, PASS with one + * argument: either a regular client, service, or server + * using the old RFC 1459 section 4.1.1 syntax. */ + LogDebug("Connection %d: got PASS command (RFC 1459) ...", + Client_Conn(Client)); + } else if ((Client_Type(Client) == CLIENT_UNKNOWN || + Client_Type(Client) == CLIENT_UNKNOWNSERVER) && + (Req->argc == 3 || Req->argc == 4)) { + /* Not yet registered "unknown" connection or outgoing server + * link, PASS with three or four argument: server using the + * RFC 2813 section 4.1.1 syntax. */ + LogDebug("Connection %d: got PASS command (RFC 2813, new server link) ...", + Client_Conn(Client)); + } else if (Client_Type(Client) == CLIENT_UNKNOWN || + Client_Type(Client) == CLIENT_UNKNOWNSERVER) { + /* Unregistered connection, but wrong number of arguments: */ + return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG, + Client_ID(Client), Req->command); + } else { + /* Registered connection, PASS command is not allowed! */ + return IRC_WriteStrClient(Client, ERR_ALREADYREGISTRED_MSG, + Client_ID(Client)); + } - /* Passwort speichern */ - Client_SetPassword( Client, Req->argv[0] ); + Client_SetPassword(Client, Req->argv[0]); - Client_SetType( Client, CLIENT_GOTPASS ); - return CONNECTED; + /* Protocol version */ + if (Req->argc >= 2 && strlen(Req->argv[1]) >= 4) { + int c2, c4; + + c2 = Req->argv[1][2]; + c4 = Req->argv[1][4]; + + Req->argv[1][4] = '\0'; + protolow = atoi(&Req->argv[1][2]); + Req->argv[1][2] = '\0'; + protohigh = atoi(Req->argv[1]); + + Req->argv[1][2] = c2; + Req->argv[1][4] = c4; + + Client_SetType(Client, CLIENT_GOTPASS_2813); + } else { + protohigh = protolow = 0; + Client_SetType(Client, CLIENT_GOTPASS); } - else if((( Client_Type( Client ) == CLIENT_UNKNOWN ) || ( Client_Type( Client ) == CLIENT_UNKNOWNSERVER )) && (( Req->argc == 3 ) || ( Req->argc == 4 ))) - { - CHAR c2, c4, *type, *impl, *serverver, *flags, *ptr; - INT protohigh, protolow; - /* noch nicht registrierte Server-Verbindung */ - Log( LOG_DEBUG, "Connection %d: got PASS command (new server link) ...", Client_Conn( Client )); + /* Protocol type, see doc/Protocol.txt */ + if (Req->argc >= 2 && strlen(Req->argv[1]) > 4) + type = &Req->argv[1][4]; + else + type = NULL; - /* Passwort speichern */ - Client_SetPassword( Client, Req->argv[0] ); + /* Protocol flags/options */ + if (Req->argc >= 4) + orig_flags = Req->argv[3]; + else + orig_flags = ""; - /* Protokollversion ermitteln */ - if( strlen( Req->argv[1] ) >= 4 ) - { - c2 = Req->argv[1][2]; - c4 = Req->argv[1][4]; - - Req->argv[1][4] = '\0'; - protolow = atoi( &Req->argv[1][2] ); - Req->argv[1][2] = '\0'; - protohigh = atoi( Req->argv[1] ); - - Req->argv[1][2] = c2; - Req->argv[1][4] = c4; - } - else protohigh = protolow = 0; - - /* Protokoll-Typ */ - if( strlen( Req->argv[1] ) > 4 ) type = &Req->argv[1][4]; - else type = NULL; - - /* Implementation, Version und ngIRCd-Flags */ - impl = Req->argv[2]; - ptr = strchr( impl, '|' ); - if( ptr ) *ptr = '\0'; + /* Implementation, version and IRC+ flags */ + if (Req->argc >= 3) { + char *impl, *ptr, *serverver, *flags; - if( type && ( strcmp( type, PROTOIRCPLUS ) == 0 )) - { - /* auf der anderen Seite laeuft ein Server, der - * ebenfalls das IRC+-Protokoll versteht */ - serverver = ptr + 1; - flags = strchr( serverver, ':' ); - if( flags ) - { + impl = Req->argv[2]; + ptr = strchr(impl, '|'); + if (ptr) + *ptr = '\0'; + + if (type && strcmp(type, PROTOIRCPLUS) == 0) { + /* The peer seems to be a server which supports the + * IRC+ protocol (see doc/Protocol.txt). */ + serverver = ptr ? ptr + 1 : "?"; + flags = strchr(ptr ? serverver : impl, ':'); + if (flags) { *flags = '\0'; flags++; - } - else flags = ""; - Log( LOG_INFO, "Connection %d: Peer announces itself as %s-%s using protocol %d.%d/IRC+ (flags: \"%s\").", Client_Conn( Client ), impl, serverver, protohigh, protolow, flags ); - } - else - { - serverver = flags = ""; - Log( LOG_INFO, "Connection %d: Peer announces itself as \"%s\" using protocol %d.%d.", Client_Conn( Client ), impl, protohigh, protolow ); + } else + flags = ""; + Log(LOG_INFO, + "Peer on conenction %d announces itself as %s-%s using protocol %d.%d/IRC+ (flags: \"%s\").", + Client_Conn(Client), impl, serverver, + protohigh, protolow, flags); + } else { + /* The peer seems to be a server supporting the + * "original" IRC protocol (RFC 2813). */ + if (strchr(orig_flags, 'Z')) + flags = "Z"; + else + flags = ""; + Log(LOG_INFO, + "Peer on connection %d announces itself as \"%s\" using protocol %d.%d (flags: \"%s\").", + Client_Conn(Client), impl, + protohigh, protolow, flags); } - - Client_SetType( Client, CLIENT_GOTPASSSERVER ); - Client_SetFlags( Client, flags ); - - return CONNECTED; - } - else if(( Client_Type( Client ) == CLIENT_UNKNOWN ) || ( Client_Type( Client ) == CLIENT_UNKNOWNSERVER )) - { - /* Falsche Anzahl Parameter? */ - return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command ); + Client_SetFlags(Client, flags); } - else return IRC_WriteStrClient( Client, ERR_ALREADYREGISTRED_MSG, Client_ID( Client )); + + return CONNECTED; } /* IRC_PASS */ -GLOBAL BOOLEAN +/** + * Handler for the IRC "NICK" command. + * + * See RFC 2812, 3.1.2 "Nick message", and RFC 2813, 4.1.3 "Nick". + * + * This function implements the IRC command "NICK" which is used to register + * with the server, to change already registered nicknames and to introduce + * new users which are connected to other servers. + * + * @param Client The client from which this command has been received. + * @param Req Request structure with prefix and all parameters. + * @returns CONNECTED or DISCONNECTED. + */ +GLOBAL bool IRC_NICK( CLIENT *Client, REQUEST *Req ) { CLIENT *intr_c, *target, *c; - CHAR *modes; + char *nick, *user, *hostname, *modes, *info; + int token, hops; assert( Client != NULL ); assert( Req != NULL ); - /* Zumindest BitchX sendet NICK-USER in der falschen Reihenfolge. */ + /* Some IRC clients, for example BitchX, send the NICK and USER + * commands in the wrong order ... */ + if(Client_Type(Client) == CLIENT_UNKNOWN + || Client_Type(Client) == CLIENT_GOTPASS + || Client_Type(Client) == CLIENT_GOTNICK #ifndef STRICT_RFC - if( Client_Type( Client ) == CLIENT_UNKNOWN || Client_Type( Client ) == CLIENT_GOTPASS || Client_Type( Client ) == CLIENT_GOTNICK || Client_Type( Client ) == CLIENT_GOTUSER || Client_Type( Client ) == CLIENT_USER || ( Client_Type( Client ) == CLIENT_SERVER && Req->argc == 1 )) -#else - if( Client_Type( Client ) == CLIENT_UNKNOWN || Client_Type( Client ) == CLIENT_GOTPASS || Client_Type( Client ) == CLIENT_GOTNICK || Client_Type( Client ) == CLIENT_USER || ( Client_Type( Client ) == CLIENT_SERVER && Req->argc == 1 )) + || Client_Type(Client) == CLIENT_GOTUSER #endif + || Client_Type(Client) == CLIENT_USER + || Client_Type(Client) == CLIENT_SERVICE + || (Client_Type(Client) == CLIENT_SERVER && Req->argc == 1)) { - /* User-Registrierung bzw. Nick-Aenderung */ + /* User registration or change of nickname */ - /* Falsche Anzahl Parameter? */ - if( Req->argc != 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command ); + /* Wrong number of arguments? */ + if( Req->argc != 1 ) + return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, + Client_ID( Client ), + Req->command ); - /* "Ziel-Client" ermitteln */ + /* Search "target" client */ if( Client_Type( Client ) == CLIENT_SERVER ) { target = Client_Search( Req->prefix ); - if( ! target ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->argv[0] ); + if( ! target ) + return IRC_WriteStrClient( Client, + ERR_NOSUCHNICK_MSG, + Client_ID( Client ), + Req->argv[0] ); } else { - /* Ist der Client "restricted"? */ - if( Client_HasMode( Client, 'r' )) return IRC_WriteStrClient( Client, ERR_RESTRICTED_MSG, Client_ID( Client )); + /* Is this a restricted client? */ + if( Client_HasMode( Client, 'r' )) + return IRC_WriteStrClient( Client, + ERR_RESTRICTED_MSG, + Client_ID( Client )); + target = Client; } #ifndef STRICT_RFC - /* Wenn der Client zu seinem eigenen Nick wechseln will, so machen - * wir nichts. So macht es das Original und mind. Snak hat probleme, - * wenn wir es nicht so machen. Ob es so okay ist? Hm ... */ - if( strcmp( Client_ID( target ), Req->argv[0] ) == 0 ) return CONNECTED; + /* If the clients tries to change to its own nickname we won't + * do anything. This is how the original ircd behaves and some + * clients (for example Snak) expect it to be like this. + * But I doubt that this is "really the right thing" ... */ + if( strcmp( Client_ID( target ), Req->argv[0] ) == 0 ) + return CONNECTED; #endif - /* pruefen, ob Nick bereits vergeben. Speziallfall: der Client - * will nur die Gross- und Kleinschreibung aendern. Das darf - * er natuerlich machen :-) */ + /* Check that the new nickname is available. Special case: + * the client only changes from/to upper to lower case. */ if( strcasecmp( Client_ID( target ), Req->argv[0] ) != 0 ) { - if( ! Client_CheckNick( target, Req->argv[0] )) return CONNECTED; + if( ! Client_CheckNick( target, Req->argv[0] )) + return CONNECTED; } - if(( Client_Type( target ) != CLIENT_USER ) && ( Client_Type( target ) != CLIENT_SERVER )) - { - /* Neuer Client */ - Log( LOG_DEBUG, "Connection %d: got valid NICK command ...", Client_Conn( Client )); + if (Client_Type(target) != CLIENT_USER && + Client_Type(target) != CLIENT_SERVICE && + Client_Type(target) != CLIENT_SERVER) { + /* New client */ + LogDebug("Connection %d: got valid NICK command ...", + Client_Conn( Client )); - /* Client-Nick registrieren */ + /* Register new nickname of this client */ Client_SetID( target, Req->argv[0] ); - /* schon ein USER da? Dann registrieren! */ - if( Client_Type( Client ) == CLIENT_GOTUSER ) return Hello_User( Client ); - else Client_SetType( Client, CLIENT_GOTNICK ); - } - else - { - /* Nick-Aenderung */ - if( Client_Conn( target ) > NONE ) - { - /* lokaler Client */ - Log( LOG_INFO, "User \"%s\" changed nick (connection %d): \"%s\" -> \"%s\".", Client_Mask( target ), Client_Conn( target ), Client_ID( target ), Req->argv[0] ); - } + /* If we received a valid USER command already then + * register the new client! */ + if( Client_Type( Client ) == CLIENT_GOTUSER ) + return Hello_User( Client ); else - { - /* Remote-Client */ - Log( LOG_DEBUG, "User \"%s\" changed nick: \"%s\" -> \"%s\".", Client_Mask( target ), Client_ID( target ), Req->argv[0] ); + Client_SetType( Client, CLIENT_GOTNICK ); + } else { + /* Nickname change */ + if (Client_Conn(target) > NONE) { + /* Local client */ + Log(LOG_INFO, + "%s \"%s\" changed nick (connection %d): \"%s\" -> \"%s\".", + Client_TypeText(target), Client_Mask(target), + Client_Conn(target), Client_ID(target), + Req->argv[0]); + Conn_UpdateIdle(Client_Conn(target)); + } else { + /* Remote client */ + LogDebug("%s \"%s\" changed nick: \"%s\" -> \"%s\".", + Client_TypeText(target), + Client_Mask(target), Client_ID(target), + Req->argv[0]); } - /* alle betroffenen User und Server ueber Nick-Aenderung informieren */ - if( Client_Type( Client ) == CLIENT_USER ) IRC_WriteStrClientPrefix( Client, Client, "NICK :%s", Req->argv[0] ); - IRC_WriteStrServersPrefix( Client, target, "NICK :%s", Req->argv[0] ); - IRC_WriteStrRelatedPrefix( target, target, FALSE, "NICK :%s", Req->argv[0] ); - - /* neuen Client-Nick speichern */ + /* Inform all users and servers (which have to know) + * of this nickname change */ + if( Client_Type( Client ) == CLIENT_USER ) + IRC_WriteStrClientPrefix( Client, Client, + "NICK :%s", + Req->argv[0] ); + IRC_WriteStrServersPrefix( Client, target, + "NICK :%s", Req->argv[0] ); + IRC_WriteStrRelatedPrefix( target, target, false, + "NICK :%s", Req->argv[0] ); + + /* Register old nickname for WHOWAS queries */ + Client_RegisterWhowas( target ); + + /* Save new nickname */ Client_SetID( target, Req->argv[0] ); + + IRC_SetPenalty( target, 2 ); } return CONNECTED; - } - else if( Client_Type( Client ) == CLIENT_SERVER ) - { - /* Server fuehrt neuen Client ein */ - - /* Falsche Anzahl Parameter? */ - if( Req->argc != 7 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command ); + } else if(Client_Type(Client) == CLIENT_SERVER || + Client_Type(Client) == CLIENT_SERVICE) { + /* Server or service introduces new client */ + + /* Bad number of parameters? */ + if (Req->argc != 2 && Req->argc != 7) + return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG, + Client_ID(Client), Req->command); + + if (Req->argc >= 7) { + /* RFC 2813 compatible syntax */ + nick = Req->argv[0]; + hops = atoi(Req->argv[1]); + user = Req->argv[2]; + hostname = Req->argv[3]; + token = atoi(Req->argv[4]); + modes = Req->argv[5] + 1; + info = Req->argv[6]; + } else { + /* RFC 1459 compatible syntax */ + nick = Req->argv[0]; + hops = 1; + user = Req->argv[0]; + hostname = Client_ID(Client); + token = atoi(Req->argv[1]); + modes = ""; + info = Req->argv[0]; + } - /* Nick ueberpruefen */ - c = Client_Search( Req->argv[0] ); - if( c ) - { - /* Der neue Nick ist auf diesem Server bereits registriert: - * sowohl der neue, als auch der alte Client muessen nun - * disconnectiert werden. */ + c = Client_Search(nick); + if(c) { + /* + * the new nick is already present on this server: + * the new and the old one have to be disconnected now. + */ Log( LOG_ERR, "Server %s introduces already registered nick \"%s\"!", Client_ID( Client ), Req->argv[0] ); Kill_Nick( Req->argv[0], "Nick collision" ); return CONNECTED; } - /* Server, zu dem der Client connectiert ist, suchen */ - intr_c = Client_GetFromToken( Client, atoi( Req->argv[4] )); + /* Find the Server this client is connected to */ + intr_c = Client_GetFromToken(Client, token); if( ! intr_c ) { Log( LOG_ERR, "Server %s introduces nick \"%s\" on unknown server!?", Client_ID( Client ), Req->argv[0] ); @@ -247,24 +365,26 @@ IRC_NICK( CLIENT *Client, REQUEST *Req ) return CONNECTED; } - /* Neue Client-Struktur anlegen */ - c = Client_NewRemoteUser( intr_c, Req->argv[0], atoi( Req->argv[1] ), Req->argv[2], Req->argv[3], atoi( Req->argv[4] ), Req->argv[5] + 1, Req->argv[6], TRUE ); + c = Client_NewRemoteUser(intr_c, nick, hops, user, hostname, + token, modes, info, true); if( ! c ) { - /* Eine neue Client-Struktur konnte nicht angelegt werden. - * Der Client muss disconnectiert werden, damit der Netz- - * status konsistent bleibt. */ + /* out of memory, need to disconnect client to keep network state consistent */ Log( LOG_ALERT, "Can't create client structure! (on connection %d)", Client_Conn( Client )); Kill_Nick( Req->argv[0], "Server error" ); return CONNECTED; } - modes = Client_Modes( c ); - if( *modes ) Log( LOG_DEBUG, "User \"%s\" (+%s) registered (via %s, on %s, %d hop%s).", Client_Mask( c ), modes, Client_ID( Client ), Client_ID( intr_c ), Client_Hops( c ), Client_Hops( c ) > 1 ? "s": "" ); - else Log( LOG_DEBUG, "User \"%s\" registered (via %s, on %s, %d hop%s).", Client_Mask( c ), Client_ID( Client ), Client_ID( intr_c ), Client_Hops( c ), Client_Hops( c ) > 1 ? "s": "" ); - - /* Andere Server, ausser dem Introducer, informieren */ - IRC_WriteStrServersPrefix( Client, Client, "NICK %s %d %s %s %d %s :%s", Req->argv[0], atoi( Req->argv[1] ) + 1, Req->argv[2], Req->argv[3], Client_MyToken( intr_c ), Req->argv[5], Req->argv[6] ); + /* RFC 2813: client is now fully registered, inform all the + * other servers about the new user. + * RFC 1459: announce the new client only after receiving the + * USER command, first we need more information! */ + if (Req->argc < 7) { + LogDebug("Client \"%s\" is being registered (RFC 1459) ...", + Client_Mask(c)); + Client_SetType(c, CLIENT_GOTNICK); + } else + Introduce_Client(Client, c, CLIENT_USER); return CONNECTED; } @@ -272,205 +392,762 @@ IRC_NICK( CLIENT *Client, REQUEST *Req ) } /* IRC_NICK */ -GLOBAL BOOLEAN -IRC_USER( CLIENT *Client, REQUEST *Req ) +/** + * Handler for the IRC "USER" command. + * + * See RFC 2812, 3.1.3 "User message". + * + * @param Client The client from which this command has been received. + * @param Req Request structure with prefix and all parameters. + * @returns CONNECTED or DISCONNECTED. + */ +GLOBAL bool +IRC_USER(CLIENT * Client, REQUEST * Req) { - assert( Client != NULL ); - assert( Req != NULL ); + CLIENT *c; +#ifdef IDENTAUTH + char *ptr; +#endif + assert(Client != NULL); + assert(Req != NULL); + + if (Client_Type(Client) == CLIENT_GOTNICK || #ifndef STRICT_RFC - if( Client_Type( Client ) == CLIENT_GOTNICK || Client_Type( Client ) == CLIENT_GOTPASS || Client_Type( Client ) == CLIENT_UNKNOWN ) -#else - if( Client_Type( Client ) == CLIENT_GOTNICK || Client_Type( Client ) == CLIENT_GOTPASS ) + Client_Type(Client) == CLIENT_UNKNOWN || #endif + Client_Type(Client) == CLIENT_GOTPASS) { - /* Falsche Anzahl Parameter? */ - if( Req->argc != 4 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command ); + /* New connection */ + if (Req->argc != 4) + return IRC_WriteStrClient(Client, + ERR_NEEDMOREPARAMS_MSG, + Client_ID(Client), + Req->command); + + /* User name */ +#ifdef IDENTAUTH + ptr = Client_User(Client); + if (!ptr || !*ptr || *ptr == '~') + Client_SetUser(Client, Req->argv[0], false); +#else + Client_SetUser(Client, Req->argv[0], false); +#endif + Client_SetOrigUser(Client, Req->argv[0]); - Client_SetUser( Client, Req->argv[0], FALSE ); - Client_SetInfo( Client, Req->argv[3] ); + /* "Real name" or user info text: Don't set it to the empty + * string, the original ircd can't deal with such "real names" + * (e. g. "USER user * * :") ... */ + if (*Req->argv[3]) + Client_SetInfo(Client, Req->argv[3]); + else + Client_SetInfo(Client, "-"); - Log( LOG_DEBUG, "Connection %d: got valid USER command ...", Client_Conn( Client )); - if( Client_Type( Client ) == CLIENT_GOTNICK ) return Hello_User( Client ); - else Client_SetType( Client, CLIENT_GOTUSER ); + LogDebug("Connection %d: got valid USER command ...", + Client_Conn(Client)); + if (Client_Type(Client) == CLIENT_GOTNICK) + return Hello_User(Client); + else + Client_SetType(Client, CLIENT_GOTUSER); return CONNECTED; + + } else if (Client_Type(Client) == CLIENT_SERVER || + Client_Type(Client) == CLIENT_SERVICE) { + /* Server/service updating an user */ + if (Req->argc != 4) + return IRC_WriteStrClient(Client, + ERR_NEEDMOREPARAMS_MSG, + Client_ID(Client), + Req->command); + c = Client_Search(Req->prefix); + if (!c) + return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG, + Client_ID(Client), + Req->prefix); + + Client_SetUser(c, Req->argv[0], true); + Client_SetOrigUser(c, Req->argv[0]); + Client_SetHostname(c, Req->argv[1]); + Client_SetInfo(c, Req->argv[3]); + + LogDebug("Connection %d: got valid USER command for \"%s\".", + Client_Conn(Client), Client_Mask(c)); + + /* RFC 1459 style user registration? + * Introduce client to network: */ + if (Client_Type(c) == CLIENT_GOTNICK) + Introduce_Client(Client, c, CLIENT_USER); + + return CONNECTED; + } else if (Client_Type(Client) == CLIENT_USER) { + /* Already registered connection */ + return IRC_WriteStrClient(Client, ERR_ALREADYREGISTRED_MSG, + Client_ID(Client)); + } else { + /* Unexpected/invalid connection state? */ + return IRC_WriteStrClient(Client, ERR_NOTREGISTERED_MSG, + Client_ID(Client)); } - else if( Client_Type( Client ) == CLIENT_USER || Client_Type( Client ) == CLIENT_SERVER || Client_Type( Client ) == CLIENT_SERVICE ) - { - return IRC_WriteStrClient( Client, ERR_ALREADYREGISTRED_MSG, Client_ID( Client )); - } - else return IRC_WriteStrClient( Client, ERR_NOTREGISTERED_MSG, Client_ID( Client )); } /* IRC_USER */ -GLOBAL BOOLEAN +/** + * Handler for the IRC "SERVICE" command. + * + * This function implements IRC Services registration using the SERVICE command + * defined in RFC 2812 3.1.6 and RFC 2813 4.1.4. + * + * At the moment ngIRCd doesn't support directly linked services, so this + * function returns ERR_ERRONEUSNICKNAME when the SERVICE command has not been + * received from a peer server. + * + * @param Client The client from which this command has been received. + * @param Req Request structure with prefix and all parameters. + * @returns CONNECTED or DISCONNECTED.. + */ +GLOBAL bool +IRC_SERVICE(CLIENT *Client, REQUEST *Req) +{ + CLIENT *c, *intr_c; + char *nick, *user, *host, *info, *modes, *ptr; + int token, hops; + + assert(Client != NULL); + assert(Req != NULL); + + if (Client_Type(Client) != CLIENT_GOTPASS && + Client_Type(Client) != CLIENT_SERVER) + return IRC_WriteStrClient(Client, ERR_ALREADYREGISTRED_MSG, + Client_ID(Client)); + + if (Req->argc != 6) + return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG, + Client_ID(Client), Req->command); + + if (Client_Type(Client) != CLIENT_SERVER) + return IRC_WriteStrClient(Client, ERR_ERRONEUSNICKNAME_MSG, + Client_ID(Client), Req->argv[0]); + + /* Bad number of parameters? */ + if (Req->argc != 6) + return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG, + Client_ID(Client), Req->command); + + nick = Req->argv[0]; + user = NULL; host = NULL; + token = atoi(Req->argv[1]); + hops = atoi(Req->argv[4]); + info = Req->argv[5]; + + /* Validate service name ("nick name") */ + c = Client_Search(nick); + if(c) { + /* Nick name collission: disconnect (KILL) both clients! */ + Log(LOG_ERR, "Server %s introduces already registered service \"%s\"!", + Client_ID(Client), nick); + Kill_Nick(nick, "Nick collision"); + return CONNECTED; + } + + /* Get the server to which the service is connected */ + intr_c = Client_GetFromToken(Client, token); + if (! intr_c) { + Log(LOG_ERR, "Server %s introduces service \"%s\" on unknown server!?", + Client_ID(Client), nick); + Kill_Nick(nick, "Unknown server"); + return CONNECTED; + } + + /* Get user and host name */ + ptr = strchr(nick, '@'); + if (ptr) { + *ptr = '\0'; + host = ++ptr; + } + if (!host) + host = Client_Hostname(intr_c); + ptr = strchr(nick, '!'); + if (ptr) { + *ptr = '\0'; + user = ++ptr; + } + if (!user) + user = nick; + + /* According to RFC 2812/2813 parameter 4 "is currently reserved + * for future usage"; but we use it to transfer the modes and check + * that the first character is a '+' sign and ignore it otherwise. */ + modes = (Req->argv[3][0] == '+') ? ++Req->argv[3] : ""; + + c = Client_NewRemoteUser(intr_c, nick, hops, user, host, + token, modes, info, true); + if (! c) { + /* Couldn't create client structure, so KILL the service to + * keep network status consistent ... */ + Log(LOG_ALERT, "Can't create client structure! (on connection %d)", + Client_Conn(Client)); + Kill_Nick(nick, "Server error"); + return CONNECTED; + } + + Introduce_Client(Client, c, CLIENT_SERVICE); + return CONNECTED; +} /* IRC_SERVICE */ + + +/** + * Handler for the IRC "WEBIRC" command. + * + * See doc/Protocol.txt, section II.4: + * "Update webchat/proxy client information". + * + * @param Client The client from which this command has been received. + * @param Req Request structure with prefix and all parameters. + * @returns CONNECTED or DISCONNECTED. + */ +GLOBAL bool +IRC_WEBIRC(CLIENT *Client, REQUEST *Req) +{ + /* Exactly 4 parameters are requited */ + if (Req->argc != 4) + return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG, + Client_ID(Client), Req->command); + + if (!Conf_WebircPwd[0] || strcmp(Req->argv[0], Conf_WebircPwd) != 0) + return IRC_WriteStrClient(Client, ERR_PASSWDMISMATCH_MSG, + Client_ID(Client)); + + LogDebug("Connection %d: got valid WEBIRC command: user=%s, host=%s, ip=%s", + Client_Conn(Client), Req->argv[1], Req->argv[2], Req->argv[3]); + + Client_SetUser(Client, Req->argv[1], true); + Client_SetOrigUser(Client, Req->argv[1]); + Client_SetHostname(Client, Req->argv[2]); + return CONNECTED; +} /* IRC_WEBIRC */ + + +/** + * Handler for the IRC "QUIT" command. + * + * See RFC 2812, 3.1.7 "Quit", and RFC 2813, 4.1.5 "Quit". + * + * @param Client The client from which this command has been received. + * @param Req Request structure with prefix and all parameters. + * @returns CONNECTED or DISCONNECTED. + */ +GLOBAL bool IRC_QUIT( CLIENT *Client, REQUEST *Req ) { CLIENT *target; - + char quitmsg[LINE_LEN]; + assert( Client != NULL ); assert( Req != NULL ); + /* Wrong number of arguments? */ + if( Req->argc > 1 ) + return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command ); + + if (Req->argc == 1) + strlcpy(quitmsg, Req->argv[0], sizeof quitmsg); + if ( Client_Type( Client ) == CLIENT_SERVER ) { /* Server */ - - /* Falsche Anzahl Parameter? */ - if( Req->argc > 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command ); - target = Client_Search( Req->prefix ); if( ! target ) { - /* Den Client kennen wir nicht (mehr), also nichts zu tun. */ Log( LOG_WARNING, "Got QUIT from %s for unknown client!?", Client_ID( Client )); return CONNECTED; } - if( Req->argc == 0 ) Client_Destroy( target, "Got QUIT command.", NULL, TRUE ); - else Client_Destroy( target, "Got QUIT command.", Req->argv[0], TRUE ); + Client_Destroy( target, "Got QUIT command.", Req->argc == 1 ? quitmsg : NULL, true); return CONNECTED; } else { - /* User, Service, oder noch nicht registriert */ - - /* Falsche Anzahl Parameter? */ - if( Req->argc > 1 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command ); - - if( Req->argc == 0 ) Conn_Close( Client_Conn( Client ), "Got QUIT command.", NULL, TRUE ); - else Conn_Close( Client_Conn( Client ), "Got QUIT command.", Req->argv[0], TRUE ); - + if (Req->argc == 1 && quitmsg[0] != '\"') { + /* " " to avoid confusion */ + strlcpy(quitmsg, "\"", sizeof quitmsg); + strlcat(quitmsg, Req->argv[0], sizeof quitmsg-1); + strlcat(quitmsg, "\"", sizeof quitmsg ); + } + + /* User, Service, or not yet registered */ + Conn_Close( Client_Conn( Client ), "Got QUIT command.", Req->argc == 1 ? quitmsg : NULL, true); + return DISCONNECTED; } } /* IRC_QUIT */ -GLOBAL BOOLEAN -IRC_PING( CLIENT *Client, REQUEST *Req ) +#ifndef STRICT_RFC + +/** + * Handler for HTTP command, e.g. GET and POST + * + * We handle these commands here to avoid the quite long timeout when + * some user tries to access this IRC daemon using an web browser ... + * + * @param Client The client from which this command has been received. + * @param Req Request structure with prefix and all parameters. + * @returns CONNECTED or DISCONNECTED. + */ +GLOBAL bool +IRC_QUIT_HTTP( CLIENT *Client, REQUEST *Req ) { - CLIENT *target, *from; + Req->argc = 1; + Req->argv[0] = "Oops, HTTP request received? This is IRC!"; + return IRC_QUIT(Client, Req); +} /* IRC_QUIT_HTTP */ - assert( Client != NULL ); - assert( Req != NULL ); +#endif - if(( Client_Type( Client ) != CLIENT_USER ) && ( Client_Type( Client ) != CLIENT_SERVER )) return IRC_WriteStrClient( Client, ERR_NOTREGISTERED_MSG, Client_ID( Client )); - /* Falsche Anzahl Parameter? */ - if( Req->argc < 1 ) return IRC_WriteStrClient( Client, ERR_NOORIGIN_MSG, Client_ID( Client )); +/** + * Handler for the IRC "PING" command. + * + * See RFC 2812, 3.7.2 "Ping message". + * + * @param Client The client from which this command has been received. + * @param Req Request structure with prefix and all parameters. + * @returns CONNECTED or DISCONNECTED. + */ +GLOBAL bool +IRC_PING(CLIENT *Client, REQUEST *Req) +{ + CLIENT *target, *from; + + assert(Client != NULL); + assert(Req != NULL); + + if (Req->argc < 1) + return IRC_WriteStrClient(Client, ERR_NOORIGIN_MSG, + Client_ID(Client)); #ifdef STRICT_RFC - if( Req->argc > 2 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command ); + /* Don't ignore additional arguments when in "strict" mode */ + if (Req->argc > 2) + return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG, + Client_ID(Client), Req->command); #endif - if( Req->argc > 1 ) - { - /* es wurde ein Ziel-Client angegeben */ - target = Client_Search( Req->argv[1] ); - if( ! target ) return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG, Client_ID( Client ), Req->argv[1] ); - if( target != Client_ThisServer( )) - { - /* ok, forwarden */ - if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix ); - else from = Client; - if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG, Client_ID( Client ), Req->prefix ); - return IRC_WriteStrClientPrefix( target, from, "PING %s :%s", Client_ID( from ), Req->argv[1] ); + if (Req->argc > 1) { + /* A target has been specified ... */ + target = Client_Search(Req->argv[1]); + + if (!target || Client_Type(target) != CLIENT_SERVER) + return IRC_WriteStrClient(Client, ERR_NOSUCHSERVER_MSG, + Client_ID(Client), Req->argv[1]); + + if (target != Client_ThisServer()) { + /* Ok, we have to forward the PING */ + if (Client_Type(Client) == CLIENT_SERVER) + from = Client_Search(Req->prefix); + else + from = Client; + if (!from) + return IRC_WriteStrClient(Client, + ERR_NOSUCHSERVER_MSG, + Client_ID(Client), Req->prefix); + + return IRC_WriteStrClientPrefix(target, from, + "PING %s :%s", Req->argv[0], + Req->argv[1] ); } } - Log( LOG_DEBUG, "Connection %d: got PING, sending PONG ...", Client_Conn( Client )); - return IRC_WriteStrClient( Client, "PONG %s :%s", Client_ID( Client_ThisServer( )), Client_ID( Client )); + if (Client_Type(Client) == CLIENT_SERVER) { + if (Req->prefix) + from = Client_Search(Req->prefix); + else + from = Client; + } else + from = Client_ThisServer(); + if (!from) + return IRC_WriteStrClient(Client, ERR_NOSUCHSERVER_MSG, + Client_ID(Client), Req->prefix); + + Log(LOG_DEBUG, "Connection %d: got PING, sending PONG ...", + Client_Conn(Client)); + +#ifdef STRICT_RFC + return IRC_WriteStrClient(Client, "PONG %s :%s", + Client_ID(from), Client_ID(Client)); +#else + /* Some clients depend on the argument being returned in the PONG + * reply (not mentioned in any RFC, though) */ + return IRC_WriteStrClient(Client, "PONG %s :%s", + Client_ID(from), Req->argv[0]); +#endif } /* IRC_PING */ -GLOBAL BOOLEAN -IRC_PONG( CLIENT *Client, REQUEST *Req ) +/** + * Handler for the IRC "PONG" command. + * + * See RFC 2812, 3.7.3 "Pong message". + * + * @param Client The client from which this command has been received. + * @param Req Request structure with prefix and all parameters. + * @returns CONNECTED or DISCONNECTED. + */ +GLOBAL bool +IRC_PONG(CLIENT *Client, REQUEST *Req) { CLIENT *target, *from; - - assert( Client != NULL ); - assert( Req != NULL ); - - if(( Client_Type( Client ) != CLIENT_USER ) && ( Client_Type( Client ) != CLIENT_SERVER )) return IRC_WriteStrClient( Client, ERR_NOTREGISTERED_MSG, Client_ID( Client )); - - /* Falsche Anzahl Parameter? */ - if( Req->argc < 1 ) return IRC_WriteStrClient( Client, ERR_NOORIGIN_MSG, Client_ID( Client )); - if( Req->argc > 2 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command ); - - /* forwarden? */ - if( Req->argc == 2 ) - { - target = Client_Search( Req->argv[1] ); - if( ! target ) return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG, Client_ID( Client ), Req->argv[1] ); - if( target != Client_ThisServer( )) - { - /* ok, forwarden */ - if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix ); - else from = Client; - if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHSERVER_MSG, Client_ID( Client ), Req->prefix ); - return IRC_WriteStrClientPrefix( target, from, "PONG %s :%s", Client_ID( from ), Req->argv[1] ); + char *s; + + assert(Client != NULL); + assert(Req != NULL); + + /* Wrong number of arguments? */ + if (Req->argc < 1) + return IRC_WriteStrClient(Client, ERR_NOORIGIN_MSG, + Client_ID(Client)); + if (Req->argc > 2) + return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG, + Client_ID(Client), Req->command); + + /* Forward? */ + if (Req->argc == 2 && Client_Type(Client) == CLIENT_SERVER) { + target = Client_Search(Req->argv[0]); + if (!target) + return IRC_WriteStrClient(Client, ERR_NOSUCHSERVER_MSG, + Client_ID(Client), Req->argv[0]); + + from = Client_Search(Req->prefix); + + if (target != Client_ThisServer() && target != from) { + /* Ok, we have to forward the message. */ + if (!from) + return IRC_WriteStrClient(Client, + ERR_NOSUCHSERVER_MSG, + Client_ID(Client), Req->prefix); + + if (Client_Type(Client_NextHop(target)) != CLIENT_SERVER) + s = Client_ID(from); + else + s = Req->argv[0]; + return IRC_WriteStrClientPrefix(target, from, + "PONG %s :%s", s, Req->argv[1]); } } - /* Der Connection-Timestamp wurde schon beim Lesen aus dem Socket - * aktualisiert, daher muss das hier nicht mehr gemacht werden. */ - - if( Client_Conn( Client ) > NONE ) Log( LOG_DEBUG, "Connection %d: received PONG. Lag: %ld seconds.", Client_Conn( Client ), time( NULL ) - Conn_LastPing( Client_Conn( Client ))); - else Log( LOG_DEBUG, "Connection %d: received PONG.", Client_Conn( Client )); - + /* The connection timestamp has already been updated when the data has + * been read from so socket, so we don't need to update it here. */ +#ifdef DEBUG + if (Client_Conn(Client) > NONE) + Log(LOG_DEBUG, + "Connection %d: received PONG. Lag: %ld seconds.", + Client_Conn(Client), + time(NULL) - Conn_LastPing(Client_Conn(Client))); + else + Log(LOG_DEBUG, + "Connection %d: received PONG.", Client_Conn(Client)); +#endif return CONNECTED; } /* IRC_PONG */ -LOCAL BOOLEAN -Hello_User( CLIENT *Client ) +/** + * Initiate client registration. + * + * This function is called after the daemon received the required NICK and + * USER commands of a new client. If the daemon is compiled with support for + * PAM, the authentication sub-processs is forked; otherwise the global server + * password is checked. + * + * @param Client The client logging in. + * @returns CONNECTED or DISCONNECTED. + */ +static bool +Hello_User(CLIENT * Client) { - assert( Client != NULL ); +#ifdef PAM + int pipefd[2], result; + CONN_ID conn; + pid_t pid; + + assert(Client != NULL); + conn = Client_Conn(Client); + + if (!Conf_PAM) { + /* Don't do any PAM authentication at all, instead emulate + * the beahiour of the daemon compiled without PAM support: + * because there can't be any "server password", all + * passwords supplied are classified as "wrong". */ + if(Client_Password(Client)[0] == '\0') + return Hello_User_PostAuth(Client); + Reject_Client(Client); + return DISCONNECTED; + } - /* Passwort ueberpruefen */ - if( strcmp( Client_Password( Client ), Conf_ServerPwd ) != 0 ) - { - /* Falsches Passwort */ - Log( LOG_ERR, "User \"%s\" rejected (connection %d): Bad password!", Client_Mask( Client ), Client_Conn( Client )); - Conn_Close( Client_Conn( Client ), NULL, "Bad password", TRUE ); + /* Fork child process for PAM authentication; and make sure that the + * process timeout is set higher than the login timeout! */ + pid = Proc_Fork(Conn_GetProcStat(conn), pipefd, + cb_Read_Auth_Result, Conf_PongTimeout + 1); + if (pid > 0) { + LogDebug("Authenticator for connection %d created (PID %d).", + conn, pid); + return CONNECTED; + } else { + /* Sub process */ + Log_Init_Subprocess("Auth"); + result = PAM_Authenticate(Client); + if (write(pipefd[1], &result, sizeof(result)) != sizeof(result)) + Log_Subprocess(LOG_ERR, + "Failed to pipe result to parent!"); + Log_Exit_Subprocess("Auth"); + exit(0); + } +#else + assert(Client != NULL); + + /* Check global server password ... */ + if (strcmp(Client_Password(Client), Conf_ServerPwd) != 0) { + /* Bad password! */ + Reject_Client(Client); return DISCONNECTED; } + return Hello_User_PostAuth(Client); +#endif +} + + +#ifdef PAM - Log( LOG_NOTICE, "User \"%s\" registered (connection %d).", Client_Mask( Client ), Client_Conn( Client )); +/** + * Read result of the authenticatior sub-process from pipe + * + * @param r_fd File descriptor of the pipe. + * @param events (ignored IO specification) + */ +static void +cb_Read_Auth_Result(int r_fd, UNUSED short events) +{ + CONN_ID conn; + CLIENT *client; + int result; + size_t len; + PROC_STAT *proc; + + LogDebug("Auth: Got callback on fd %d, events %d", r_fd, events); + conn = Conn_GetFromProc(r_fd); + if (conn == NONE) { + /* Ops, none found? Probably the connection has already + * been closed!? We'll ignore that ... */ + io_close(r_fd); + LogDebug("Auth: Got callback for unknown connection!?"); + return; + } + proc = Conn_GetProcStat(conn); + client = Conn_GetClient(conn); + + /* Read result from pipe */ + len = Proc_Read(proc, &result, sizeof(result)); + if (len == 0) + return; + + if (len != sizeof(result)) { + Log(LOG_CRIT, "Auth: Got malformed result!"); + Reject_Client(client); + return; + } + + if (result == true) { + Client_SetUser(client, Client_OrigUser(client), true); + (void)Hello_User_PostAuth(client); + } else + Reject_Client(client); +} + +#endif + + +/** + * Reject a client because of wrong password. + * + * This function is called either when the global server password or a password + * checked using PAM has been wrong. + * + * @param Client The client to reject. + */ +static void +Reject_Client(CLIENT *Client) +{ + Log(LOG_ERR, + "User \"%s\" rejected (connection %d): Access denied!", + Client_Mask(Client), Client_Conn(Client)); + Conn_Close(Client_Conn(Client), NULL, + "Access denied! Bad password?", true); +} - /* Andere Server informieren */ - IRC_WriteStrServers( NULL, "NICK %s 1 %s %s 1 +%s :%s", Client_ID( Client ), Client_User( Client ), Client_Hostname( Client ), Client_Modes( Client ), Client_Info( Client )); - if( ! IRC_WriteStrClient( Client, RPL_WELCOME_MSG, Client_ID( Client ), Client_Mask( Client ))) return FALSE; - if( ! IRC_WriteStrClient( Client, RPL_YOURHOST_MSG, Client_ID( Client ), Client_ID( Client_ThisServer( )), VERSION, TARGET_CPU, TARGET_CPU, TARGET_OS )) return FALSE; - if( ! IRC_WriteStrClient( Client, RPL_CREATED_MSG, Client_ID( Client ), NGIRCd_StartStr )) return FALSE; - if( ! IRC_WriteStrClient( Client, RPL_MYINFO_MSG, Client_ID( Client ), Client_ID( Client_ThisServer( )), VERSION, USERMODES, CHANMODES )) return FALSE; +/** + * Finish client registration. + * + * Introduce the new client to the network and send all "hello messages" + * to it after authentication has been succeeded. + * + * @param Client The client logging in. + * @returns CONNECTED or DISCONNECTED. + */ +static bool +Hello_User_PostAuth(CLIENT *Client) +{ + Introduce_Client(NULL, Client, CLIENT_USER); + + if (!IRC_WriteStrClient + (Client, RPL_WELCOME_MSG, Client_ID(Client), Client_Mask(Client))) + return false; + if (!IRC_WriteStrClient + (Client, RPL_YOURHOST_MSG, Client_ID(Client), + Client_ID(Client_ThisServer()), PACKAGE_VERSION, TARGET_CPU, + TARGET_VENDOR, TARGET_OS)) + return false; + if (!IRC_WriteStrClient + (Client, RPL_CREATED_MSG, Client_ID(Client), NGIRCd_StartStr)) + return false; + if (!IRC_WriteStrClient + (Client, RPL_MYINFO_MSG, Client_ID(Client), + Client_ID(Client_ThisServer()), PACKAGE_VERSION, USERMODES, + CHANMODES)) + return false; + + /* Features supported by this server (005 numeric, ISUPPORT), + * see for details. */ + if (!IRC_Send_ISUPPORT(Client)) + return DISCONNECTED; - Client_SetType( Client, CLIENT_USER ); + if (!IRC_Send_LUSERS(Client)) + return DISCONNECTED; + if (!IRC_Show_MOTD(Client)) + return DISCONNECTED; - if( ! IRC_Send_LUSERS( Client )) return DISCONNECTED; - if( ! IRC_Show_MOTD( Client )) return DISCONNECTED; + /* Suspend the client for a second ... */ + IRC_SetPenalty(Client, 1); return CONNECTED; -} /* Hello_User */ +} -LOCAL VOID -Kill_Nick( CHAR *Nick, CHAR *Reason ) +/** + * Kill all users with a specific nick name in the network. + * + * @param Nick Nick name. + * @param Reason Reason for the KILL. + */ +static void +Kill_Nick( char *Nick, char *Reason ) { - CLIENT *c; + REQUEST r; assert( Nick != NULL ); assert( Reason != NULL ); + r.prefix = (char *)Client_ThisServer( ); + r.argv[0] = Nick; + r.argv[1] = Reason; + r.argc = 2; + Log( LOG_ERR, "User(s) with nick \"%s\" will be disconnected: %s", Nick, Reason ); + IRC_KILL( Client_ThisServer( ), &r ); +} /* Kill_Nick */ - /* andere Server benachrichtigen */ - IRC_WriteStrServers( NULL, "KILL %s :%s", Nick, Reason ); - /* Ggf. einen eigenen Client toeten */ - c = Client_Search( Nick ); - if( c && ( Client_Conn( c ) != NONE )) Conn_Close( Client_Conn( c ), NULL, Reason, TRUE ); -} /* Kill_Nick */ +/** + * Introduce a new user or service client in the network. + * + * @param From Remote server introducing the client or NULL (local). + * @param Client New client. + * @param Type Type of the client (CLIENT_USER or CLIENT_SERVICE). + */ +static void +Introduce_Client(CLIENT *From, CLIENT *Client, int Type) +{ + /* Set client type (user or service) */ + Client_SetType(Client, Type); + + if (From) { + if (Conf_IsService(Conf_GetServer(Client_Conn(From)), + Client_ID(Client))) + Client_SetType(Client, CLIENT_SERVICE); + LogDebug("%s \"%s\" (+%s) registered (via %s, on %s, %d hop%s).", + Client_TypeText(Client), Client_Mask(Client), + Client_Modes(Client), Client_ID(From), + Client_ID(Client_Introducer(Client)), + Client_Hops(Client), Client_Hops(Client) > 1 ? "s": ""); + } else { + Log(LOG_NOTICE, "%s \"%s\" registered (connection %d).", + Client_TypeText(Client), Client_Mask(Client), + Client_Conn(Client)); + Log_ServerNotice('c', "Client connecting: %s (%s@%s) [%s] - %s", + Client_ID(Client), Client_User(Client), + Client_Hostname(Client), + Conn_IPA(Client_Conn(Client)), + Client_TypeText(Client)); + } + + /* Inform other servers */ + IRC_WriteStrServersPrefixFlag_CB(From, + From != NULL ? From : Client_ThisServer(), + '\0', cb_introduceClient, (void *)Client); +} /* Introduce_Client */ + + +/** + * Introduce a new user or service client to a remote server. + * + * This function differentiates between RFC1459 and RFC2813 server links and + * generates the appropriate commands to register the new user or service. + * + * @param To The remote server to inform. + * @param Prefix Prefix for the generated commands. + * @param data CLIENT structure of the new client. + */ +static void +cb_introduceClient(CLIENT *To, CLIENT *Prefix, void *data) +{ + CLIENT *c = (CLIENT *)data; + CONN_ID conn; + char *modes, *user, *host; + + modes = Client_Modes(c); + user = Client_User(c) ? Client_User(c) : "-"; + host = Client_Hostname(c) ? Client_Hostname(c) : "-"; + + conn = Client_Conn(To); + if (Conn_Options(conn) & CONN_RFC1459) { + /* RFC 1459 mode: separate NICK and USER commands */ + Conn_WriteStr(conn, "NICK %s :%d", Client_ID(c), + Client_Hops(c) + 1); + Conn_WriteStr(conn, ":%s USER %s %s %s :%s", + Client_ID(c), user, host, + Client_ID(Client_Introducer(c)), Client_Info(c)); + if (modes[0]) + Conn_WriteStr(conn, ":%s MODE %s +%s", + Client_ID(c), Client_ID(c), modes); + } else { + /* RFC 2813 mode: one combined NICK or SERVICE command */ + if (Client_Type(c) == CLIENT_SERVICE + && strchr(Client_Flags(To), 'S')) + IRC_WriteStrClientPrefix(To, Prefix, + "SERVICE %s %d * +%s %d :%s", + Client_Mask(c), + Client_MyToken(Client_Introducer(c)), + Client_Modes(c), Client_Hops(c) + 1, + Client_Info(c)); + else + IRC_WriteStrClientPrefix(To, Prefix, + "NICK %s %d %s %s %d +%s :%s", + Client_ID(c), Client_Hops(c) + 1, + user, host, + Client_MyToken(Client_Introducer(c)), + modes, Client_Info(c)); + } +} /* cb_introduceClient */ /* -eof- */