IPv6: Add config options to disabe ipv4/ipv6 support.

This also enables ipv6-only setups.

diff --git a/doc/sample-ngircd.conf b/doc/sample-ngircd.conf
index 13014d32a0fb6d8ee1afc1904ab8428db658a523..9f107a83f42e524da59a604d5879509d069a3e9f 100644 (file)
--- a/doc/sample-ngircd.conf
+++ b/doc/sample-ngircd.conf
@@ -103,6 +103,15 @@
        # Don't do any DNS lookups when a client connects to the server.
        ;NoDNS = no
 
+       # allow both ipv4 and ipv6 clients to connect by opening both
+       # ipv4 and ipv6 sockets
+       ;ListenIPv6 = yes
+       ;ListenIPv4 = yes
+
+       # try to connect to other irc servers using ipv4 and ipv6, if possible
+       ;ConnectIPv6 = yes
+       ;ConnectIPv4 = yes
+
        # Maximum number of simultaneous connection the server is allowed
        # to accept (0: unlimited):
        ;MaxConnections = 0

diff --git a/man/ngircd.conf.5.tmpl b/man/ngircd.conf.5.tmpl
index 3a6b7d56176af3d1d46e826afb9942b3e7e242ef..cd5922afd9ab4071e8852c397eb4f0f6e1803d74 100644 (file)
--- a/man/ngircd.conf.5.tmpl
+++ b/man/ngircd.conf.5.tmpl
@@ -158,6 +158,24 @@ If you configure ngircd to connect to other servers, ngircd may still
 perform a DNS lookup if required.
 Default: No.
 .TP
+\fBListenIPv4\fR
+Set this to no if you do not want ngircd to accept clients using the standard internet protocol, ipv4.
+This allows use of ngircd in ipv6-only setups.
+Default: Yes.
+.TP
+\fBListenIPv6\fR
+Set this to no if you do not want ngircd to accept clients using the new internet protocol, ipv6.
+Default: Yes.
+.TP
+\fBConnectIPv4\fR
+Set this to no if you do not want ngircd to connect to other irc servers using ipv4.
+This allows use of ngircd in ipv6-only setups.
+Default: Yes.
+.TP
+\fBConnectIPv6\fR
+Set this to no if you do not want ngircd to connect to other irc servers using ipv6.
+Default: Yes.
+.TP
 \fBMaxConnections\fR
 Maximum number of simultaneous connection the server is allowed to accept
 (0: unlimited). Default: 0.

diff --git a/src/ngircd/conf.c b/src/ngircd/conf.c
index 0f6686221696f463eccd11097aa488fd8121bcbc..ad2baa9ef2a73fe6b424b1832f871c94f38407b4 100644 (file)
--- a/src/ngircd/conf.c
+++ b/src/ngircd/conf.c
@@ -152,6 +152,15 @@ Conf_Rehash( void )
 } /* Config_Rehash */
 
 
+static const char*
+yesno_to_str(int boolean_value)
+{
+       if (boolean_value)
+               return "yes";
+       return "no";
+}
+
+
 GLOBAL int
 Conf_Test( void )
 {
@@ -201,10 +210,17 @@ Conf_Test( void )
        printf( "  PingTimeout = %d\n", Conf_PingTimeout );
        printf( "  PongTimeout = %d\n", Conf_PongTimeout );
        printf( "  ConnectRetry = %d\n", Conf_ConnectRetry );
-       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( "  OperCanUseMode = %s\n", yesno_to_str(Conf_OperCanMode));
+       printf( "  OperServerMode = %s\n", yesno_to_str(Conf_OperServerMode));
+       printf( "  PredefChannelsOnly = %s\n", yesno_to_str(Conf_PredefChannelsOnly));
+       printf( "  NoDNS = %s\n", yesno_to_str(Conf_NoDNS));
+
+#ifdef WANT_IPV6
+       printf("  ListenIPv6 = %s\n", yesno_to_str(Conf_ListenIPv6));
+       printf("  ListenIPv4 = %s\n", yesno_to_str(Conf_ListenIPv4));
+       printf("  ConnectIPv4= %s\n", yesno_to_str(Conf_ConnectIPv6));
+       printf("  ConnectIPv6 = %s\n", yesno_to_str(Conf_ConnectIPv4));
+#endif
        printf( "  MaxConnections = %ld\n", Conf_MaxConnections);
        printf( "  MaxConnectionsIP = %d\n", Conf_MaxConnectionsIP);
        printf( "  MaxJoins = %d\n", Conf_MaxJoins>0 ? Conf_MaxJoins : -1);
@@ -449,6 +465,11 @@ Set_Defaults( bool InitServers )
        Conf_PredefChannelsOnly = false;
        Conf_OperServerMode = false;
 
+       Conf_ConnectIPv4 = true;
+       Conf_ListenIPv4 = true;
+       Conf_ConnectIPv6 = true;
+       Conf_ListenIPv6 = true;
+
        Conf_MaxConnections = 0;
        Conf_MaxConnectionsIP = 5;
        Conf_MaxJoins = 10;
@@ -817,6 +838,33 @@ Handle_GLOBAL( int Line, char *Var, char *Arg )
                Conf_NoDNS = Check_ArgIsTrue( Arg );
                return;
        }
+#ifdef WANT_IPV6
+       /* the default setting for all the WANT_IPV6 special options is 'true' */
+       if( strcasecmp( Var, "ListenIPv6" ) == 0 ) {
+               /* listen on ipv6 sockets, if available? */
+               Conf_ListenIPv6 = Check_ArgIsTrue( Arg );
+               return;
+       }
+       if( strcasecmp( Var, "ListenIPv4" ) == 0 ) {
+               /*
+                * listen on ipv4 sockets, if available?
+                * this allows "ipv6-only" setups.
+                */
+               Conf_ListenIPv4 = Check_ArgIsTrue( Arg );
+               return;
+       }
+       if( strcasecmp( Var, "ConnectIPv6" ) == 0 ) {
+               /* connect to other hosts using ipv6, if they have an AAAA record? */
+               Conf_ConnectIPv6 = Check_ArgIsTrue( Arg );
+               return;
+       }
+       if( strcasecmp( Var, "ConnectIPv4" ) == 0 ) {
+               /* connect to other hosts using ipv4.
+                * again, this can be used for ipv6-only setups */
+               Conf_ConnectIPv4 = Check_ArgIsTrue( Arg );
+               return;
+       }
+#endif
        if( strcasecmp( Var, "OperCanUseMode" ) == 0 ) {
                /* Are IRC operators allowed to use MODE in channels they aren't Op in? */
                Conf_OperCanMode = Check_ArgIsTrue( Arg );
@@ -1138,6 +1186,16 @@ Validate_Config(bool Configtest, bool Rehash)
                             "No administrative information configured but required by RFC!");
        }
 
+#ifdef WANT_IPV6
+       if (!Conf_ListenIPv4 && !Conf_ListenIPv6)
+               Config_Error(LOG_ALERT,
+                       "Both \"ListenIPv4\" and \"ListenIPv6\" are set to 'no'; no network protocol available!");
+
+       if (!Conf_ConnectIPv4 && !Conf_ConnectIPv6)
+               Config_Error(LOG_ALERT,
+                       "Both \"ConnectIPv4\" and \"ConnectIPv6\" are set to 'no'; ngircd will fail to connect to other irc servers");
+#endif
+
 #ifdef DEBUG
        servers = servers_once = 0;
        for (i = 0; i < MAX_SERVERS; i++) {

diff --git a/src/ngircd/conf.h b/src/ngircd/conf.h
index d505f3390db01625f259d565bf7c9dffc4cc26dd..3bc206605e208d40b78cd02c1cab05fcb9eeb8cb 100644 (file)
--- a/src/ngircd/conf.h
+++ b/src/ngircd/conf.h
@@ -124,11 +124,20 @@ GLOBAL bool Conf_OperCanMode;
 /* Disable all DNS functions? */
 GLOBAL bool Conf_NoDNS;
 
-/* don't listen for incoming ipv6 connections, even if OS supports it? */
-GLOBAL bool Conf_NoListenIpv6;
+/* listen for incoming ipv6 connections if OS supports it (default: yes)? */
+GLOBAL bool Conf_ListenIPv6;
 
-/* don't connect to remote systems unsign ipv6? */
-GLOBAL bool Conf_NoConnectIpv6;
+/* listen for incoming ipv4 connections if OS supports it (default: yes)? */
+GLOBAL bool Conf_ListenIPv4;
+
+/*
+ * try to connect to remote systems using the ipv6 protocol,
+ * if they have an ipv6 address? (default yes)
+ */
+GLOBAL bool Conf_ConnectIPv6;
+
+/* same as above, but for ipv4 hosts, default: yes  */
+GLOBAL bool Conf_ConnectIPv4;
 
 /* If an IRC op gives chanop privileges without being a chanop,
  * ircd2 will ignore the command. This enables a workaround:

diff --git a/src/ngircd/conn.c b/src/ngircd/conn.c
index 9e31e4eec576e7c3a747e0c97d65ed790911b5da..1696d5c5f62968d8d495576b4e1bc67947db66ee 100644 (file)
--- a/src/ngircd/conn.c
+++ b/src/ngircd/conn.c
@@ -315,10 +315,11 @@ Conn_InitListeners( void )
        }
 
 #ifdef WANT_IPV6
-       if (!Conf_NoListenIpv6)
+       if (Conf_ListenIPv6)
                created = ports_initlisteners(&Conf_ListenPorts, AF_INET6, cb_listen);
 #endif
-       created += ports_initlisteners(&Conf_ListenPorts, AF_INET, cb_listen);
+       if (Conf_ListenIPv4)
+               created += ports_initlisteners(&Conf_ListenPorts, AF_INET, cb_listen);
 
        return created;
 } /* Conn_InitListeners */

diff --git a/src/ngircd/resolve.c b/src/ngircd/resolve.c
index a128694bab19f06033dff4da93737f32bb0094b6..041c15620b1585c56f84dd45c8fa7a17f55b0c1a 100644 (file)
--- a/src/ngircd/resolve.c
+++ b/src/ngircd/resolve.c
@@ -45,6 +45,10 @@ static void Do_ResolveAddr PARAMS(( const ng_ipaddr_t *Addr, int Sock, int w_fd
 static void Do_ResolveName PARAMS(( const char *Host, int w_fd ));
 static bool register_callback PARAMS((RES_STAT *s, void (*cbfunc)(int, short)));
 
+#ifdef WANT_IPV6
+extern bool Conf_ConnectIPv4;
+extern bool Conf_ConnectIPv6;
+#endif
 
 static pid_t
 Resolver_fork(int *pipefds)
@@ -270,7 +274,7 @@ ForwardLookup(const char *hostname, array *IpAddr)
 #ifdef HAVE_GETADDRINFO
        int res;
        struct addrinfo *a, *ai_results;
-       static const struct addrinfo hints = {
+       static struct addrinfo hints = {
 #ifndef WANT_IPV6
                .ai_family = AF_INET,
 #endif
@@ -280,6 +284,14 @@ ForwardLookup(const char *hostname, array *IpAddr)
                .ai_socktype = SOCK_STREAM,
                .ai_protocol = IPPROTO_TCP
        };
+#ifdef WANT_IPV6
+       assert(Conf_ConnectIPv6 || Conf_ConnectIPv4);
+
+       if (!Conf_ConnectIPv6)
+               hints.ai_family = AF_INET;
+       if (!Conf_ConnectIPv4)
+               hints.ai_family = AF_INET6;
+#endif
        res = getaddrinfo(hostname, NULL, &hints, &ai_results);
        switch (res) {
        case 0: break;