Basic IPv6 support. Some inspiration from the patches by Lubos Dolezel and JF Tremblay at https://bugzilla.icculus.org/show_bug.cgi?id=2355.

code/client/cl_main.c

@@ -780,7 +780,7 @@ void CL_MapLoading( void ) {
 		Key_SetCatcher( 0 );
 		SCR_UpdateScreen();
 		clc.connectTime = -RETRANSMIT_TIMEOUT;
-		NET_StringToAdr( cls.servername, &clc.serverAddress);
+		NET_StringToAdr( cls.servername, &clc.serverAddress, NA_UNSPEC);
 		// we don't need a challenge on the localhost
 
 		CL_CheckForResend();
@@ -808,7 +808,7 @@ CL_UpdateGUID
 update cl_guid using QKEY_FILE and optional prefix
 ====================
 */
-static void CL_UpdateGUID( char *prefix, int prefix_len )
+static void CL_UpdateGUID( const char *prefix, int prefix_len )
 {
 	fileHandle_t f;
 	int len;
@@ -941,7 +941,7 @@ void CL_RequestMotd( void ) {
 		return;
 	}
 	Com_Printf( "Resolving %s\n", UPDATE_SERVER_NAME );
-	if ( !NET_StringToAdr( UPDATE_SERVER_NAME, &cls.updateServer  ) ) {
+	if ( !NET_StringToAdr( UPDATE_SERVER_NAME, &cls.updateServer, NA_IP ) ) {
 		Com_Printf( "Couldn't resolve address\n" );
 		return;
 	}
@@ -1011,7 +1011,7 @@ void CL_RequestAuthorization( void ) {
 
 	if ( !cls.authorizeServer.port ) {
 		Com_Printf( "Resolving %s\n", AUTHORIZE_SERVER_NAME );
-		if ( !NET_StringToAdr( AUTHORIZE_SERVER_NAME, &cls.authorizeServer  ) ) {
+		if ( !NET_StringToAdr( AUTHORIZE_SERVER_NAME, &cls.authorizeServer, NA_IP ) ) {
 			Com_Printf( "Couldn't resolve address\n" );
 			return;
 		}
@@ -1145,13 +1145,29 @@ CL_Connect_f
 */
 void CL_Connect_f( void ) {
 	char	*server;
-	char	serverString[ 22 ];
+	const char	*serverString;
+	int argc = Cmd_Argc();
+	netadrtype_t family = NA_UNSPEC;
 
-	if ( Cmd_Argc() != 2 ) {
+	if ( argc != 2 && argc != 3 ) {
-		Com_Printf( "usage: connect [server]\n");
+		Com_Printf( "usage: connect [-4|-6] server\n");
 		return;	
 	}
 	
+	if(argc == 2)
+		server = Cmd_Argv(1);
+	else
+	{
+		if(!strcmp(Cmd_Argv(1), "-4"))
+			family = NA_IP;
+		else if(!strcmp(Cmd_Argv(1), "-6"))
+			family = NA_IP6;
+		else
+			Com_Printf( "warning: only -4 or -6 as address type understood.\n");
+		
+		server = Cmd_Argv(2);
+	}
+
 	Cvar_Set("ui_singlePlayerActive", "0");
 
 	// fire a message off to the motd server
@@ -1160,8 +1176,6 @@ void CL_Connect_f( void ) {
 	// clear any previous "server full" type messages
 	clc.serverMessage[0] = 0;
 
-	server = Cmd_Argv (1);
-
 	if ( com_sv_running->integer && !strcmp( server, "localhost" ) ) {
 		// if running a local server, kill it
 		SV_Shutdown( "Server quit" );
@@ -1180,7 +1194,7 @@ void CL_Connect_f( void ) {
 
 	Q_strncpyz( cls.servername, server, sizeof(cls.servername) );
 
-	if (!NET_StringToAdr( cls.servername, &clc.serverAddress) ) {
+	if (!NET_StringToAdr(cls.servername, &clc.serverAddress, family) ) {
 		Com_Printf ("Bad server address\n");
 		cls.state = CA_DISCONNECTED;
 		return;
@@ -1188,12 +1202,10 @@ void CL_Connect_f( void ) {
 	if (clc.serverAddress.port == 0) {
 		clc.serverAddress.port = BigShort( PORT_SERVER );
 	}
-	Com_sprintf( serverString, sizeof( serverString ), "%i.%i.%i.%i:%i",
-                clc.serverAddress.ip[0], clc.serverAddress.ip[1],
-                clc.serverAddress.ip[2], clc.serverAddress.ip[3],
-                BigShort( clc.serverAddress.port ) );
 
-	Com_Printf( "%s resolved to %s\n", cls.servername, serverString );
+	serverString = NET_AdrToStringwPort(clc.serverAddress);
+
+	Com_Printf( "%s resolved to %s\n", cls.servername, serverString);
 
 	if( cl_guidServerUniq->integer )
 		CL_UpdateGUID( serverString, strlen( serverString ) );
@@ -1260,7 +1272,7 @@ void CL_Rcon_f( void ) {
 
 			return;
 		}
-		NET_StringToAdr (rconAddress->string, &to);
+		NET_StringToAdr (rconAddress->string, &to, NA_UNSPEC);
 		if (to.port == 0) {
 			to.port = BigShort (PORT_SERVER);
 		}
@@ -1697,8 +1709,8 @@ void CL_CheckForResend( void ) {
 
 	switch ( cls.state ) {
 	case CA_CONNECTING:
-		// requesting a challenge
+		// requesting a challenge .. IPv6 users always get in as authorize server supports no ipv6.
-		if ( !Sys_IsLANAddress( clc.serverAddress ) ) {
+		if ( clc.serverAddress.type == NA_IP && !Sys_IsLANAddress( clc.serverAddress ) ) {
 			CL_RequestAuthorization();
 		}
 		NET_OutOfBandPrint(NS_CLIENT, clc.serverAddress, "getchallenge");
@@ -1968,7 +1980,7 @@ void CL_ConnectionlessPacket( netadr_t from, msg_t *msg ) {
 	// challenge from the server we are connecting to
 	if ( !Q_stricmp(c, "challengeResponse") ) {
 		if ( cls.state != CA_CONNECTING ) {
-			Com_Printf( "Unwanted challenge response received.  Ignored.\n" );
+			Com_DPrintf( "Unwanted challenge response received.  Ignored.\n" );
 		} else {
 			// start sending challenge repsonse instead of challenge request packets
 			clc.challenge = atoi(Cmd_Argv(1));
@@ -3059,7 +3071,7 @@ int CL_ServerStatus( char *serverAddress, char *serverStatusString, int maxLen )
 		return qfalse;
 	}
 	// get the address
-	if ( !NET_StringToAdr( serverAddress, &to ) ) {
+	if ( !NET_StringToAdr( serverAddress, &to, NA_UNSPEC) ) {
 		return qfalse;
 	}
 	serverStatus = CL_GetServerStatus( to );
@@ -3262,7 +3274,7 @@ void CL_GlobalServers_f( void ) {
 	// reset the list, waiting for response
 	// -1 is used to distinguish a "no response"
 
-	NET_StringToAdr( cl_master->string, &to );
+	NET_StringToAdr( cl_master->string, &to, NA_IP );
 
 	if( cls.masterNum == 1 ) {
 		cls.nummplayerservers = -1;
@@ -3465,17 +3477,33 @@ void CL_Ping_f( void ) {
 	netadr_t	to;
 	ping_t*		pingptr;
 	char*		server;
+	int			argc;
+	netadrtype_t	family = NA_UNSPEC;
 
-	if ( Cmd_Argc() != 2 ) {
+	argc = Cmd_Argc();
-		Com_Printf( "usage: ping [server]\n");
+
+	if ( argc != 2 && argc != 3 ) {
+		Com_Printf( "usage: ping [-4|-6] server\n");
 		return;	
 	}
 	
+	if(argc == 2)
+		server = Cmd_Argv(1);
+	else
+	{
+		if(!strcmp(Cmd_Argv(1), "-4"))
+			family = NA_IP;
+		else if(!strcmp(Cmd_Argv(1), "-6"))
+			family = NA_IP6;
+		else
+			Com_Printf( "warning: only -4 or -6 as address type understood.\n");
+		
+		server = Cmd_Argv(2);
+	}
+
 	Com_Memset( &to, 0, sizeof(netadr_t) );
 
-	server = Cmd_Argv(1);
+	if ( !NET_StringToAdr( server, &to, family ) ) {
-
-	if ( !NET_StringToAdr( server, &to ) ) {
 		return;
 	}
 
@@ -3603,32 +3631,53 @@ CL_ServerStatus_f
 ==================
 */
 void CL_ServerStatus_f(void) {
-	netadr_t	to;
+	netadr_t	to, *toptr = NULL;
 	char		*server;
 	serverStatus_t *serverStatus;
+	int			argc;
+	netadrtype_t	family = NA_UNSPEC;
 
+	argc = Cmd_Argc();
+
+	if ( argc != 2 && argc != 3 )
+	{
+		if (cls.state != CA_ACTIVE || clc.demoplaying)
+		{
+			Com_Printf ("Not connected to a server.\n");
+			Com_Printf( "usage: serverstatus [-4|-6] server\n");
+			return;
+		}
+
+		toptr = &clc.serverAddress;
+	}
+	
+	if(!toptr)
+	{
 		Com_Memset( &to, 0, sizeof(netadr_t) );
 	
-	if ( Cmd_Argc() != 2 ) {
+		if(argc == 2)
-		if ( cls.state != CA_ACTIVE || clc.demoplaying ) {
-			Com_Printf ("Not connected to a server.\n");
-			Com_Printf( "Usage: serverstatus [server]\n");
-			return;	
-		}
-		server = cls.servername;
-	}
-	else {
 			server = Cmd_Argv(1);
+		else
+		{
+			if(!strcmp(Cmd_Argv(1), "-4"))
+				family = NA_IP;
+			else if(!strcmp(Cmd_Argv(1), "-6"))
+				family = NA_IP6;
+			else
+				Com_Printf( "warning: only -4 or -6 as address type understood.\n");
+		
+			server = Cmd_Argv(2);
 		}
 
-	if ( !NET_StringToAdr( server, &to ) ) {
+		toptr = &to;
+		if ( !NET_StringToAdr( server, toptr, family ) )
 			return;
 	}
 
-	NET_OutOfBandPrint( NS_CLIENT, to, "getstatus" );
+	NET_OutOfBandPrint( NS_CLIENT, *toptr, "getstatus" );
 
-	serverStatus = CL_GetServerStatus( to );
+	serverStatus = CL_GetServerStatus( *toptr );
-	serverStatus->address = to;
+	serverStatus->address = *toptr;
 	serverStatus->print = qtrue;
 	serverStatus->pending = qtrue;
 }

code/client/cl_ui.c

@@ -156,7 +156,7 @@ static int LAN_AddServer(int source, const char *name, const char *address) {
 			break;
 	}
 	if (servers && *count < max) {
-		NET_StringToAdr( address, &adr );
+		NET_StringToAdr( address, &adr, NA_IP );
 		for ( i = 0; i < *count; i++ ) {
 			if (NET_CompareAdr(servers[i].adr, adr)) {
 				break;
@@ -203,7 +203,7 @@ static void LAN_RemoveServer(int source, const char *addr) {
 	}
 	if (servers) {
 		netadr_t comp;
-		NET_StringToAdr( addr, &comp );
+		NET_StringToAdr( addr, &comp, NA_IP );
 		for (i = 0; i < *count; i++) {
 			if (NET_CompareAdr( comp, servers[i].adr)) {
 				int j = i;

code/qcommon/net_chan.c

@@ -460,74 +460,6 @@ qboolean Netchan_Process( netchan_t *chan, msg_t *msg ) {
 
 //==============================================================================
 
-/*
-===================
-NET_CompareBaseAdr
-
-Compares without the port
-===================
-*/
-qboolean	NET_CompareBaseAdr (netadr_t a, netadr_t b)
-{
-	if (a.type != b.type)
-		return qfalse;
-
-	if (a.type == NA_LOOPBACK)
-		return qtrue;
-
-	if (a.type == NA_IP)
-	{
-		if (a.ip[0] == b.ip[0] && a.ip[1] == b.ip[1] && a.ip[2] == b.ip[2] && a.ip[3] == b.ip[3])
-			return qtrue;
-		return qfalse;
-	}
-
-	Com_Printf ("NET_CompareBaseAdr: bad address type\n");
-	return qfalse;
-}
-
-const char	*NET_AdrToString (netadr_t a)
-{
-	static	char	s[64];
-
-	if (a.type == NA_LOOPBACK) {
-		Com_sprintf (s, sizeof(s), "loopback");
-	} else if (a.type == NA_BOT) {
-		Com_sprintf (s, sizeof(s), "bot");
-	} else if (a.type == NA_IP) {
-		Com_sprintf (s, sizeof(s), "%i.%i.%i.%i:%hu",
-			a.ip[0], a.ip[1], a.ip[2], a.ip[3], BigShort(a.port));
-	}
-
-	return s;
-}
-
-
-qboolean	NET_CompareAdr (netadr_t a, netadr_t b)
-{
-	if (a.type != b.type)
-		return qfalse;
-
-	if (a.type == NA_LOOPBACK)
-		return qtrue;
-
-	if (a.type == NA_IP)
-	{
-		if (a.ip[0] == b.ip[0] && a.ip[1] == b.ip[1] && a.ip[2] == b.ip[2] && a.ip[3] == b.ip[3] && a.port == b.port)
-			return qtrue;
-		return qfalse;
-	}
-
-	Com_Printf ("NET_CompareAdr: bad address type\n");
-	return qfalse;
-}
-
-
-qboolean	NET_IsLocalAddress( netadr_t adr ) {
-	return adr.type == NA_LOOPBACK;
-}
-
-
 
 /*
 =============================================================================
@@ -743,10 +675,10 @@ NET_StringToAdr
 Traps "localhost" for loopback, passes everything else to system
 =============
 */
-qboolean	NET_StringToAdr( const char *s, netadr_t *a ) {
+qboolean	NET_StringToAdr( const char *s, netadr_t *a, netadrtype_t family ) {
 	qboolean	r;
-	char	base[MAX_STRING_CHARS];
+	char	base[MAX_STRING_CHARS], *search;
-	char	*port;
+	char	*port = NULL;
 
 	if (!strcmp (s, "localhost")) {
 		Com_Memset (a, 0, sizeof(*a));
@@ -756,21 +688,37 @@ qboolean	NET_StringToAdr( const char *s, netadr_t *a ) {
 
 	// look for a port number
 	Q_strncpyz( base, s, sizeof( base ) );
-	port = strstr( base, ":" );
+	
+	if(*base == '[')
+	{
+		// This is an ipv6 address, handle it specially.
+		search = strchr(base, ']');
+		if(search)
+		{
+			*search = '\0';
+			search++;
+
+			if(*search == ':')
+				port = search + 1;
+		}
+		
+		search = base + 1;
+	}
+	else
+	{
+		port = strchr( base, ':' );
+		
 		if ( port ) {
-		*port = 0;
+			*port = '\0';
 			port++;
 		}
 		
-	r = Sys_StringToAdr( base, a );
+		search = base;
-
-	if ( !r ) {
-		a->type = NA_BAD;
-		return qfalse;
 	}
 
-	// inet_addr returns this if out of range
+	r = Sys_StringToAdr( search, a, family );
-	if ( a->ip[0] == 255 && a->ip[1] == 255 && a->ip[2] == 255 && a->ip[3] == 255 ) {
+
+	if ( !r ) {
 		a->type = NA_BAD;
 		return qfalse;
 	}

code/qcommon/qcommon.h

@@ -136,7 +136,9 @@ typedef enum {
 	NA_BAD,					// an address lookup failed
 	NA_LOOPBACK,
 	NA_BROADCAST,
-	NA_IP
+	NA_IP,
+	NA_IP6,
+	NA_UNSPEC
 } netadrtype_t;
 
 typedef enum {
@@ -144,10 +146,12 @@ typedef enum {
 	NS_SERVER
 } netsrc_t;
 
+#define NET_ADDRSTRMAXLEN 48	// maximum length of an IPv6 address string including trailing '\0'
 typedef struct {
 	netadrtype_t	type;
 
 	byte	ip[4];
+	byte	ip6[16];
 
 	unsigned short	port;
 } netadr_t;
@@ -165,7 +169,8 @@ qboolean	NET_CompareAdr (netadr_t a, netadr_t b);
 qboolean	NET_CompareBaseAdr (netadr_t a, netadr_t b);
 qboolean	NET_IsLocalAddress (netadr_t adr);
 const char	*NET_AdrToString (netadr_t a);
-qboolean	NET_StringToAdr ( const char *s, netadr_t *a);
+const char      *NET_AdrToStringwPort (netadr_t a);
+qboolean	NET_StringToAdr ( const char *s, netadr_t *a, netadrtype_t family);
 qboolean	NET_GetLoopPacket (netsrc_t sock, netadr_t *net_from, msg_t *net_message);
 void		NET_Sleep(int msec);
 
@@ -1015,7 +1020,7 @@ void	Sys_SetErrorText( const char *text );
 void	Sys_SendPacket( int length, const void *data, netadr_t to );
 qboolean Sys_GetPacket( netadr_t *net_from, msg_t *net_message );
 
-qboolean	Sys_StringToAdr( const char *s, netadr_t *a );
+qboolean	Sys_StringToAdr( const char *s, netadr_t *a, netadrtype_t family );
 //Does NOT parse port numbers, only base addresses.
 
 qboolean	Sys_IsLANAddress (netadr_t adr);

code/server/sv_ccmds.c

@@ -433,7 +433,7 @@ static void SV_Ban_f( void ) {
 	// look up the authorize server's IP
 	if ( !svs.authorizeAddress.ip[0] && svs.authorizeAddress.type != NA_BAD ) {
 		Com_Printf( "Resolving %s\n", AUTHORIZE_SERVER_NAME );
-		if ( !NET_StringToAdr( AUTHORIZE_SERVER_NAME, &svs.authorizeAddress ) ) {
+		if ( !NET_StringToAdr( AUTHORIZE_SERVER_NAME, &svs.authorizeAddress, NA_IP ) ) {
 			Com_Printf( "Couldn't resolve address\n" );
 			return;
 		}
@@ -487,7 +487,7 @@ static void SV_BanNum_f( void ) {
 	// look up the authorize server's IP
 	if ( !svs.authorizeAddress.ip[0] && svs.authorizeAddress.type != NA_BAD ) {
 		Com_Printf( "Resolving %s\n", AUTHORIZE_SERVER_NAME );
-		if ( !NET_StringToAdr( AUTHORIZE_SERVER_NAME, &svs.authorizeAddress ) ) {
+		if ( !NET_StringToAdr( AUTHORIZE_SERVER_NAME, &svs.authorizeAddress, NA_IP ) ) {
 			Com_Printf( "Couldn't resolve address\n" );
 			return;
 		}

code/server/sv_client.c

@@ -88,10 +88,13 @@ void SV_GetChallenge( netadr_t from ) {
 		return;
 	}
 
+	// Drop the authorize stuff if this client is coming in via v6 as the auth server does not support ipv6.
+	if(challenge->adr.type == NA_IP)
+	{
 		// look up the authorize server's IP
 		if ( !svs.authorizeAddress.ip[0] && svs.authorizeAddress.type != NA_BAD ) {
 			Com_Printf( "Resolving %s\n", AUTHORIZE_SERVER_NAME );
-		if ( !NET_StringToAdr( AUTHORIZE_SERVER_NAME, &svs.authorizeAddress ) ) {
+			if ( !NET_StringToAdr( AUTHORIZE_SERVER_NAME, &svs.authorizeAddress, NA_IP ) ) {
 				Com_Printf( "Couldn't resolve address\n" );
 				return;
 			}
@@ -133,6 +136,14 @@ void SV_GetChallenge( netadr_t from ) {
 				"getIpAuthorize %i %i.%i.%i.%i %s 0 %s",  svs.challenges[i].challenge,
 				from.ip[0], from.ip[1], from.ip[2], from.ip[3], game, sv_strictAuth->string );
 		}
+	}
+	else
+	{
+		challenge->pingTime = svs.time;
+		
+		NET_OutOfBandPrint( NS_SERVER, challenge->adr, 
+			"challengeResponse %i", challenge->challenge );
+	}
 }
 
 /*
@@ -284,9 +295,8 @@ void SV_DirectConnect( netadr_t from ) {
 
 		for (i=0 ; i<MAX_CHALLENGES ; i++) {
 			if (NET_CompareAdr(from, svs.challenges[i].adr)) {
-				if ( challenge == svs.challenges[i].challenge ) {
+				if ( challenge == svs.challenges[i].challenge )
-					break;		// good
+					break;
-				}
 			}
 		}
 		if (i == MAX_CHALLENGES) {

code/server/sv_main.c

@@ -252,7 +252,7 @@ void SV_MasterHeartbeat( void ) {
 			sv_master[i]->modified = qfalse;
 	
 			Com_Printf( "Resolving %s\n", sv_master[i]->string );
-			if ( !NET_StringToAdr( sv_master[i]->string, &adr[i] ) ) {
+			if ( !NET_StringToAdr( sv_master[i]->string, &adr[i], NA_IP ) ) {
 				// if the address failed to resolve, clear it
 				// so we don't take repeated dns hits
 				Com_Printf( "Couldn't resolve address: %s\n", sv_master[i]->string );