/*
* ngIRCd -- The Next Generation IRC Daemon
- * Copyright (c)2001-2003 by Alexander Barton (alex@barton.de)
+ * Copyright (c)2001-2004 Alexander Barton <alex@barton.de>
*
* 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
#include "portab.h"
-static char UNUSED id[] = "$Id: irc.c,v 1.121 2003/04/29 12:19:20 alex Exp $";
+static char UNUSED id[] = "$Id: irc.c,v 1.132 2008/01/15 22:28:14 fw Exp $";
#include "imp.h"
#include <assert.h>
#include <string.h>
#include "ngircd.h"
-#include "conn.h"
#include "resolve.h"
-#include "conf.h"
#include "conn-func.h"
+#include "conf.h"
#include "client.h"
#include "channel.h"
#include "defines.h"
#include "irc-write.h"
#include "log.h"
+#include "match.h"
#include "messages.h"
#include "parse.h"
#include "irc.h"
-LOCAL CHAR *Option_String PARAMS(( CONN_ID Idx ));
+static char *Option_String PARAMS((CONN_ID Idx));
+static bool Send_Message PARAMS((CLIENT *Client, REQUEST *Req, int ForceType, bool SendErrors));
+static bool Send_Message_Mask PARAMS((CLIENT *from, char *targetMask, char *message, bool SendErrors));
+static bool MatchCaseInsensitive PARAMS((const char *pattern, const char *searchme));
-GLOBAL BOOLEAN
+GLOBAL bool
IRC_ERROR( CLIENT *Client, REQUEST *Req )
{
assert( Client != NULL );
} /* IRC_ERROR */
-GLOBAL BOOLEAN
+/**
+ * Kill client on request.
+ * This function implements the IRC command "KILL" wich is used to selectively
+ * disconnect clients. It can be used by IRC operators and servers, for example
+ * to "solve" nick collisions after netsplits.
+ * Please note that this function is also called internally, without a real
+ * KILL command beeing received over the network! Client is Client_ThisServer()
+ * in this case. */
+GLOBAL bool
IRC_KILL( CLIENT *Client, REQUEST *Req )
{
CLIENT *prefix, *c;
- CHAR reason[COMMAND_LEN];
+ char reason[COMMAND_LEN], *msg;
CONN_ID my_conn, conn;
assert( Client != NULL );
assert( Req != NULL );
- /* Is the user an IRC operator? */
- if(( Client_Type( Client ) != CLIENT_SERVER ) && ( ! Client_OperByMe( Client ))) return IRC_WriteStrClient( Client, ERR_NOPRIVILEGES_MSG, Client_ID( Client ));
+ if(( Client_Type( Client ) != CLIENT_SERVER ) &&
+ ( ! Client_OperByMe( Client )))
+ {
+ /* The originator of the KILL is neither an IRC operator of
+ * this server nor a server. */
+ return IRC_WriteStrClient( Client, ERR_NOPRIVILEGES_MSG,
+ Client_ID( Client ));
+ }
- /* Bad number of parameters? */
- if(( Req->argc != 2 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
+ if( Req->argc != 2 )
+ {
+ /* This command requires exactly 2 parameters! */
+ return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG,
+ Client_ID( Client ), Req->command );
+ }
if( Req->prefix ) prefix = Client_Search( Req->prefix );
else prefix = Client;
if( ! prefix )
{
- Log( LOG_WARNING, "Got KILL with invalid prefix: \"%s\"!", Req->prefix );
+ Log( LOG_WARNING, "Got KILL with invalid prefix: \"%s\"!",
+ Req->prefix );
prefix = Client_ThisServer( );
}
- if( Client != Client_ThisServer( )) Log( LOG_NOTICE|LOG_snotice, "Got KILL command from \"%s\" for \"%s\": %s", Client_Mask( prefix ), Req->argv[0], Req->argv[1] );
+ if( Client != Client_ThisServer( ))
+ {
+ /* This is a "real" KILL received from the network. */
+ Log( LOG_NOTICE|LOG_snotice, "Got KILL command from \"%s\" for \"%s\": %s",
+ Client_Mask( prefix ), Req->argv[0], Req->argv[1] );
+ }
/* Build reason string */
- if( Client_Type( Client ) == CLIENT_USER ) snprintf( reason, sizeof( reason ), "KILLed by %s: %s", Client_ID( Client ), Req->argv[1] );
- else strlcpy( reason, Req->argv[1], sizeof( reason ));
+ if( Client_Type( Client ) == CLIENT_USER )
+ {
+ /* Prefix the "reason" if the originator is a regular user,
+ * so users can't spoof KILLs of servers. */
+ snprintf( reason, sizeof( reason ), "KILLed by %s: %s",
+ Client_ID( Client ), Req->argv[1] );
+ }
+ else
+ strlcpy( reason, Req->argv[1], sizeof( reason ));
/* Inform other servers */
- IRC_WriteStrServersPrefix( Client, prefix, "KILL %s :%s", Req->argv[0], reason );
+ IRC_WriteStrServersPrefix( Client, prefix, "KILL %s :%s",
+ Req->argv[0], reason );
/* Save ID of this connection */
my_conn = Client_Conn( Client );
-
+
/* Do we host such a client? */
c = Client_Search( Req->argv[0] );
if( c )
{
- /* Yes, there is such a client -- but is it a valid user? */
- if( Client_Type( c ) == CLIENT_SERVER )
- {
- if( Client != Client_ThisServer( )) IRC_WriteStrClient( Client, ERR_CANTKILLSERVER_MSG, Client_ID( Client ));
- else
- {
- /* Oops, I should kill another server!? */
- Log( LOG_ERR, "Can't KILL server \"%s\"!", Req->argv[0] );
- conn = Client_Conn( Client_NextHop( c ));
- assert( conn > NONE );
- Conn_Close( conn, NULL, "Nick collision for server!?", TRUE );
- }
- }
- else if( Client_Type( c ) != CLIENT_USER )
+ if(( Client_Type( c ) != CLIENT_USER ) &&
+ ( Client_Type( c ) != CLIENT_GOTNICK ))
{
- if( Client != Client_ThisServer( )) IRC_WriteStrClient( Client, ERR_NOPRIVILEGES_MSG, Client_ID( Client ));
- else
+ /* Target of this KILL is not a regular user, this is
+ * invalid! So we ignore this case if we received a
+ * regular KILL from the network and try to kill the
+ * client/connection anyway (but log an error!) if the
+ * origin is the local server. */
+
+ if( Client != Client_ThisServer( ))
{
- /* Oops, what sould I close?? */
- Log( LOG_ERR, "Can't KILL \"%s\": invalid client type!", Req->argv[0] );
- conn = Client_Conn( Client_NextHop( c ));
- assert( conn > NONE );
- Conn_Close( conn, NULL, "Collision for invalid client type!?", TRUE );
+ /* Invalid KILL received from remote */
+ if( Client_Type( c ) == CLIENT_SERVER )
+ msg = ERR_CANTKILLSERVER_MSG;
+ else
+ msg = ERR_NOPRIVILEGES_MSG;
+ return IRC_WriteStrClient( Client, msg,
+ Client_ID( Client ));
}
+
+ Log( LOG_ERR, "Got KILL for invalid client type: %d, \"%s\"!",
+ Client_Type( c ), Req->argv[0] );
}
- else
- {
- /* Kill user NOW! */
- conn = Client_Conn( c );
- Client_Destroy( c, NULL, reason, FALSE );
- if( conn != NONE ) Conn_Close( conn, NULL, reason, TRUE );
- }
+
+ /* Kill client NOW! */
+ conn = Client_Conn( c );
+ Client_Destroy( c, NULL, reason, false );
+ if( conn > NONE )
+ Conn_Close( conn, NULL, reason, true );
}
- else Log( LOG_NOTICE, "Client with nick \"%s\" is unknown here.", Req->argv[0] );
+ else
+ Log( LOG_NOTICE, "Client with nick \"%s\" is unknown here.", Req->argv[0] );
/* Are we still connected or were we killed, too? */
- if(( my_conn > NONE ) && ( Client_GetFromConn( my_conn ))) return CONNECTED;
- else return DISCONNECTED;
+ if(( my_conn > NONE ) && ( Conn_GetClient( my_conn )))
+ return CONNECTED;
+ else
+ return DISCONNECTED;
} /* IRC_KILL */
-GLOBAL BOOLEAN
+GLOBAL bool
IRC_NOTICE( CLIENT *Client, REQUEST *Req )
{
- CLIENT *to, *from;
-
- assert( Client != NULL );
- assert( Req != NULL );
-
- if(( Client_Type( Client ) != CLIENT_USER ) && ( Client_Type( Client ) != CLIENT_SERVER )) return CONNECTED;
-
- /* Falsche Anzahl Parameter? */
- if( Req->argc != 2 ) return CONNECTED;
-
- if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
- else from = Client;
- if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
-
- to = Client_Search( Req->argv[0] );
- if(( to ) && ( Client_Type( to ) == CLIENT_USER ))
- {
- /* Okay, Ziel ist ein User */
- return IRC_WriteStrClientPrefix( to, from, "NOTICE %s :%s", Client_ID( to ), Req->argv[1] );
- }
- else return CONNECTED;
+ return Send_Message(Client, Req, CLIENT_USER, false);
} /* IRC_NOTICE */
-GLOBAL BOOLEAN
-IRC_PRIVMSG( CLIENT *Client, REQUEST *Req )
+/**
+ * Handler for the IRC command PRIVMSG.
+ */
+GLOBAL bool
+IRC_PRIVMSG(CLIENT *Client, REQUEST *Req)
{
- CLIENT *cl, *from;
- CHANNEL *chan;
-
- assert( Client != NULL );
- assert( Req != NULL );
-
- /* Falsche Anzahl Parameter? */
- if( Req->argc == 0 ) return IRC_WriteStrClient( Client, ERR_NORECIPIENT_MSG, Client_ID( Client ), Req->command );
- if( Req->argc == 1 ) return IRC_WriteStrClient( Client, ERR_NOTEXTTOSEND_MSG, Client_ID( Client ));
- if( Req->argc > 2 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
-
- if( Client_Type( Client ) == CLIENT_SERVER ) from = Client_Search( Req->prefix );
- else from = Client;
- if( ! from ) return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG, Client_ID( Client ), Req->prefix );
-
- cl = Client_Search( Req->argv[0] );
- if( cl )
- {
- /* Okay, Ziel ist ein Client. Aber ist es auch ein User? */
- if( Client_Type( cl ) != CLIENT_USER ) return IRC_WriteStrClient( from, ERR_NOSUCHNICK_MSG, Client_ID( from ), Req->argv[0] );
-
- /* Okay, Ziel ist ein User */
- if(( Client_Type( Client ) != CLIENT_SERVER ) && ( strchr( Client_Modes( cl ), 'a' )))
- {
- /* Ziel-User ist AWAY: Meldung verschicken */
- if( ! IRC_WriteStrClient( from, RPL_AWAY_MSG, Client_ID( from ), Client_ID( cl ), Client_Away( cl ))) return DISCONNECTED;
- }
-
- /* Text senden */
- if( Client_Conn( from ) > NONE ) Conn_UpdateIdle( Client_Conn( from ));
- return IRC_WriteStrClientPrefix( cl, from, "PRIVMSG %s :%s", Client_ID( cl ), Req->argv[1] );
- }
+ return Send_Message(Client, Req, CLIENT_USER, true);
+} /* IRC_PRIVMSG */
- chan = Channel_Search( Req->argv[0] );
- if( chan ) return Channel_Write( chan, from, Client, Req->argv[1] );
- return IRC_WriteStrClient( from, ERR_NOSUCHNICK_MSG, Client_ID( from ), Req->argv[0] );
-} /* IRC_PRIVMSG */
+/**
+ * Handler for the IRC command SQUERY.
+ */
+GLOBAL bool
+IRC_SQUERY(CLIENT *Client, REQUEST *Req)
+{
+ return Send_Message(Client, Req, CLIENT_SERVICE, true);
+} /* IRC_SQUERY */
-GLOBAL BOOLEAN
+GLOBAL bool
IRC_TRACE( CLIENT *Client, REQUEST *Req )
{
CLIENT *from, *target, *c;
CONN_ID idx, idx2;
+ char user[CLIENT_USER_LEN];
assert( Client != NULL );
assert( Req != NULL );
if( Client_Type( c ) == CLIENT_SERVER )
{
/* Server link */
- if( ! IRC_WriteStrClient( from, RPL_TRACESERVER_MSG, Client_ID( from ), Client_ID( c ), Client_Mask( c ), Option_String( Client_Conn( c )))) return DISCONNECTED;
+ strlcpy( user, Client_User( c ), sizeof( user ));
+ if( user[0] == '~' ) strlcpy( user, "unknown", sizeof( user ));
+ if( ! IRC_WriteStrClient( from, RPL_TRACESERVER_MSG, Client_ID( from ), Client_ID( c ), user, Client_Hostname( c ), Client_Mask( Client_ThisServer( )), Option_String( Client_Conn( c )))) return DISCONNECTED;
}
if(( Client_Type( c ) == CLIENT_USER ) && ( strchr( Client_Modes( c ), 'o' )))
{
c = Client_Next( c );
}
- /* Some information about us */
- if( ! IRC_WriteStrClient( from, RPL_TRACESERVER_MSG, Client_ID( from ), Conf_ServerName, Client_Mask( Client_ThisServer( )), Option_String( Client_Conn( Client )))) return DISCONNECTED;
-
+ IRC_SetPenalty( Client, 3 );
return IRC_WriteStrClient( from, RPL_TRACEEND_MSG, Client_ID( from ), Conf_ServerName, PACKAGE_NAME, PACKAGE_VERSION, NGIRCd_DebugLevel );
} /* IRC_TRACE */
-GLOBAL BOOLEAN
+GLOBAL bool
IRC_HELP( CLIENT *Client, REQUEST *Req )
{
COMMAND *cmd;
if( ! IRC_WriteStrClient( Client, "NOTICE %s :%s", Client_ID( Client ), cmd->name )) return DISCONNECTED;
cmd++;
}
+
+ IRC_SetPenalty( Client, 2 );
return CONNECTED;
} /* IRC_HELP */
-LOCAL CHAR *
+static char *
Option_String( CONN_ID Idx )
{
- STATIC CHAR option_txt[8];
- INT options;
+ static char option_txt[8];
+ UINT16 options;
- options = Conn_Options( Idx );
+ options = Conn_Options(Idx);
- strcpy( option_txt, "F" ); /* No idea what this means but the original ircd sends it ... */
-#ifdef USE_ZLIB
- if( options & CONN_ZIP ) strcat( option_txt, "z" );
+ strcpy(option_txt, "F"); /* No idea what this means, but the
+ * original ircd sends it ... */
+#ifdef ZLIB
+ if(options & CONN_ZIP) /* zlib compression supported. */
+ strcat(option_txt, "z");
#endif
return option_txt;
} /* Option_String */
+static bool
+Send_Message(CLIENT * Client, REQUEST * Req, int ForceType, bool SendErrors)
+{
+ CLIENT *cl, *from;
+ CHANNEL *chan;
+ char *targetList = Req->argv[0];
+ char *currentTarget = Req->argv[0];
+ unsigned int targetCount = 1;
+
+ assert( Client != NULL );
+ assert( Req != NULL );
+
+ if (Req->argc == 0) {
+ if (!SendErrors)
+ return true;
+ return IRC_WriteStrClient(Client, ERR_NORECIPIENT_MSG,
+ Client_ID(Client), Req->command);
+ }
+ if (Req->argc == 1) {
+ if (!SendErrors)
+ return true;
+ return IRC_WriteStrClient(Client, ERR_NOTEXTTOSEND_MSG,
+ Client_ID(Client));
+ }
+ if (Req->argc > 2) {
+ if (!SendErrors)
+ return true;
+ return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
+ Client_ID(Client), Req->command);
+ }
+
+ if (Client_Type(Client) == CLIENT_SERVER)
+ from = Client_Search(Req->prefix);
+ else
+ from = Client;
+ if (!from) {
+ return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
+ Client_ID(Client), Req->prefix);
+ }
+
+ while (*targetList) {
+ if (*targetList == ',') {
+ *targetList = '\0';
+ targetCount++;
+ }
+ targetList++;
+ }
+
+ while (targetCount > 0) {
+ if (strchr(currentTarget, '!') == NULL)
+ cl = Client_Search(currentTarget);
+ else
+ cl = NULL;
+ if (cl == NULL) {
+ char target[513]; // max mesage length plus null terminator
+ char * nick = NULL;
+ char * user = NULL;
+ char * host = NULL;
+ char * server = NULL;
+
+ strncpy(target, currentTarget, 512);
+ target[512] = '\0';
+ server = strchr(target, '@');
+ if (server) {
+ *server = '\0';
+ server++;
+ }
+ host = strchr(target, '%');
+ if (host) {
+ *host = '\0';
+ host++;
+ }
+ user = strchr(target, '!');
+ if (user) {
+ *user = '\0';
+ user++;
+ nick = target;
+ host = server; // <msgto> form: nick!user@host
+ } else {
+ user = target;
+ }
+
+ if (user != NULL) {
+ for (cl = Client_First(); cl != NULL; cl = Client_Next(cl)) {
+ if (Client_Type(cl) != CLIENT_USER)
+ continue;
+ if (nick != NULL) {
+ if (strcmp(nick, Client_ID(cl)) == 0 && strcmp(user, Client_User(cl)) == 0 && strcasecmp(host, Client_Hostname(cl)) == 0)
+ break;
+ else
+ continue;
+ }
+ if (strcasecmp(user, Client_User(cl)) != 0)
+ continue;
+ if (host != NULL && strcasecmp(host, Client_Hostname(cl)) != 0)
+ continue;
+ if (server != NULL && strcasecmp(server, Client_ID(Client_Introducer(cl))) != 0)
+ continue;
+ break;
+ }
+ }
+ }
+
+ if (cl) {
+ /* Target is a user, enforce type */
+ if (Client_Type(cl) != ForceType) {
+ if (!SendErrors)
+ return true;
+ if (!IRC_WriteStrClient(from, ERR_NOSUCHNICK_MSG,
+ Client_ID(from),
+ currentTarget))
+ return false;
+ } else if ((Client_Type(Client) != CLIENT_SERVER
+ && (strchr(Client_Modes(cl), 'a')))) {
+ /* Target is away */
+ if (!SendErrors)
+ return true;
+ if (!IRC_WriteStrClient
+ (from, RPL_AWAY_MSG, Client_ID(from), Client_ID(cl),
+ Client_Away(cl)))
+ return DISCONNECTED;
+ } if (Client_Conn(from) > NONE) {
+ Conn_UpdateIdle(Client_Conn(from));
+ }
+ if (!IRC_WriteStrClientPrefix(cl, from, "PRIVMSG %s :%s",
+ Client_ID(cl), Req->argv[1]))
+ return false;
+ } else if (strchr("$#", currentTarget[0]) && strchr(currentTarget, '.')) {
+ if (!Send_Message_Mask(from, currentTarget, Req->argv[1], SendErrors))
+ return false;
+ } else if ((chan = Channel_Search(currentTarget))) {
+ if (!Channel_Write(chan, from, Client, Req->argv[1]))
+ return false;
+ } else {
+ if (!SendErrors)
+ return true;
+ if (!IRC_WriteStrClient(from, ERR_NOSUCHNICK_MSG,
+ Client_ID(from), currentTarget))
+ return false;
+ }
+
+ while (*currentTarget)
+ currentTarget++;
+
+ currentTarget++;
+ targetCount--;
+ }
+
+ return CONNECTED;
+
+} /* Send_Message */
+
+
+static bool
+Send_Message_Mask(CLIENT * from, char * targetMask, char * message, bool SendErrors)
+{
+ CLIENT *cl;
+ bool client_match;
+ char *mask = targetMask + 1;
+
+ cl = NULL;
+
+ if (strchr(Client_Modes(from), 'o') == NULL) {
+ if (!SendErrors)
+ return true;
+ return IRC_WriteStrClient(from, ERR_NOPRIVILEGES_MSG, Client_ID(from));
+ }
+
+ if (targetMask[0] == '#') {
+ for (cl = Client_First(); cl != NULL; cl = Client_Next(cl)) {
+ if (Client_Type(cl) != CLIENT_USER)
+ continue;
+ client_match = MatchCaseInsensitive(mask, Client_Hostname(cl));
+ if (client_match)
+ if (!IRC_WriteStrClientPrefix(cl, from, "PRIVMSG %s :%s", Client_ID(cl), message))
+ return false;
+ }
+ } else {
+ for (cl = Client_First(); cl != NULL; cl = Client_Next(cl)) {
+ if (Client_Type(cl) != CLIENT_USER)
+ continue;
+ client_match = MatchCaseInsensitive(mask, Client_ID(Client_Introducer(cl)));
+ if (client_match)
+ if (!IRC_WriteStrClientPrefix(cl, from, "PRIVMSG %s :%s", Client_ID(cl), message))
+ return false;
+ }
+ }
+ return CONNECTED;
+} /* Send_Message_Mask */
+
+
+static bool
+MatchCaseInsensitive(const char *pattern, const char *searchme)
+{
+ char haystack[COMMAND_LEN];
+
+ strlcpy(haystack, searchme, sizeof(haystack));
+
+ ngt_LowerStr(haystack);
+
+ return Match(pattern, haystack);
+}
+
/* -eof- */
projects / ngircd-alex.git / blobdiff