New config option NoDNS: disables all DNS queries.

man/ngircd.conf.5.tmpl

@@ -1,5 +1,5 @@
 .\"
-.\" $Id: ngircd.conf.5.tmpl,v 1.4 2007/10/13 20:45:12 fw Exp $
+.\" $Id: ngircd.conf.5.tmpl,v 1.5 2007/10/25 11:01:19 fw Exp $
 .\"
 .TH ngircd.conf 5 "August 2005" ngircd "ngIRCd Manual"
 .SH NAME
@@ -150,6 +150,13 @@ by non-chanops as if they were coming from the server. Default: no.
 If enabled, no new channels can be created. Useful if
 you do not want to have channels other than those defined in
 the config file.
+Default: No.
+.TP
+\fBNoDNS\fR
+If enabled, ngircd will not make DNS lookups when clients connect.
+If you configure ngircd to connect to other servers, ngircd may still
+perform a DNS lookup if required.
+Default: No.
 .TP
 \fBMaxConnections\fR
 Maximum number of simultaneous connection the server is allowed to accept

src/ngircd/client.c

@@ -17,7 +17,7 @@
 
 #include "portab.h"
 
-static char UNUSED id[] = "$Id: client.c,v 1.95 2007/01/23 16:07:19 alex Exp $";
+static char UNUSED id[] = "$Id: client.c,v 1.96 2007/10/25 11:01:19 fw Exp $";
 
 #include "imp.h"
 #include <assert.h>
@@ -94,9 +94,10 @@ Client_Init( void )
 	This_Server->hops = 0;
 
 	gethostname( This_Server->host, CLIENT_HOST_LEN );
-	h = gethostbyname( This_Server->host );
+	if (!Conf_NoDNS) {
-	if( h ) strlcpy( This_Server->host, h->h_name, sizeof( This_Server->host ));
+		h = gethostbyname( This_Server->host );
-
+		if (h) strlcpy(This_Server->host, h->h_name, sizeof(This_Server->host));
+	}
 	Client_SetID( This_Server, Conf_ServerName );
 	Client_SetInfo( This_Server, Conf_ServerInfo );
 

src/ngircd/conf.c

@@ -14,7 +14,7 @@
 
 #include "portab.h"
 
-static char UNUSED id[] = "$Id: conf.c,v 1.100 2007/10/24 00:48:41 fw Exp $";
+static char UNUSED id[] = "$Id: conf.c,v 1.101 2007/10/25 11:01:19 fw Exp $";
 
 #include "imp.h"
 #include <assert.h>
@@ -205,6 +205,7 @@ Conf_Test( void )
 	printf( "  OperCanUseMode = %s\n", Conf_OperCanMode == true ? "yes" : "no" );
 	printf( "  OperServerMode = %s\n", Conf_OperServerMode == true? "yes" : "no" );
 	printf( "  PredefChannelsOnly = %s\n", Conf_PredefChannelsOnly == true ? "yes" : "no" );
+	printf( "  NoDNS = %s\n", Conf_NoDNS ? "yes" : "no");
 	printf( "  MaxConnections = %ld\n", Conf_MaxConnections);
 	printf( "  MaxConnectionsIP = %d\n", Conf_MaxConnectionsIP);
 	printf( "  MaxJoins = %d\n\n", Conf_MaxJoins);
@@ -444,6 +445,7 @@ Set_Defaults( bool InitServers )
 	Conf_Channel_Count = 0;
 
 	Conf_OperCanMode = false;
+	Conf_NoDNS = false;
 	Conf_PredefChannelsOnly = false;
 	Conf_OperServerMode = false;
 
@@ -783,6 +785,11 @@ Handle_GLOBAL( int Line, char *Var, char *Arg )
 		Conf_PredefChannelsOnly = Check_ArgIsTrue( Arg );
 		return;
 	}
+	if( strcasecmp( Var, "NoDNS" ) == 0 ) {
+		/* don't do reverse dns lookups when clients connect? */
+		Conf_NoDNS = Check_ArgIsTrue( Arg );
+		return;
+	}
 	if( strcasecmp( Var, "OperCanUseMode" ) == 0 ) {
 		/* Are IRC operators allowed to use MODE in channels they aren't Op in? */
 		Conf_OperCanMode = Check_ArgIsTrue( Arg );

src/ngircd/conf.h

@@ -8,7 +8,7 @@
  * (at your option) any later version.
  * Please read the file COPYING, README and AUTHORS for more information.
  *
- * $Id: conf.h,v 1.43 2007/06/28 05:15:18 fw Exp $
+ * $Id: conf.h,v 1.44 2007/10/25 11:01:19 fw Exp $
  *
  * Configuration management (header)
  */
@@ -118,6 +118,9 @@ GLOBAL bool Conf_PredefChannelsOnly;
 /* Are IRC operators allowed to always use MODE? */
 GLOBAL bool Conf_OperCanMode;
 
+/* Disable all DNS functions? */
+GLOBAL bool Conf_NoDNS;
+
 /* If an IRC op gives chanop privileges without being a chanop,
  * ircd2 will ignore the command. This enables a workaround:
  * It masks the command as coming from the server */

src/ngircd/conn.c

@@ -17,7 +17,7 @@
 #include "portab.h"
 #include "io.h"
 
-static char UNUSED id[] = "$Id: conn.c,v 1.212 2007/10/04 15:03:56 alex Exp $";
+static char UNUSED id[] = "$Id: conn.c,v 1.213 2007/10/25 11:01:19 fw Exp $";
 
 #include "imp.h"
 #include <assert.h>
@@ -1039,11 +1039,11 @@ New_Connection( int Sock )
 
 	Client_SetHostname( c, My_Connections[new_sock].host );
 
-	Resolve_Addr(&My_Connections[new_sock].res_stat, &new_addr,
+	if (!Conf_NoDNS)
-		My_Connections[new_sock].sock, cb_Read_Resolver_Result);
+		Resolve_Addr(&My_Connections[new_sock].res_stat, &new_addr,
+			My_Connections[new_sock].sock, cb_Read_Resolver_Result);
 
-	/* Penalty-Zeit setzen */
+	Conn_SetPenalty(new_sock, 4);
-	Conn_SetPenalty( new_sock, 4 );
 	return new_sock;
 } /* New_Connection */