Make /showip available in the server

It was only provided in the client before. But in fact it is only
relevant for server-side networking.
Also migrate it to new-style command.

Author: slipher

src/engine/client/cl_main.cpp

@@ -151,7 +151,6 @@ CGameVM            cgvm;
 refexport_t        re;
 
 void        CL_CheckForResend();
-void        CL_ShowIP_f();
 
 #if defined(USE_MUMBLE)
 static void CL_UpdateMumble()
@@ -2400,7 +2399,6 @@ void CL_Init()
 
 	Cmd_AddCommand( "ping", CL_Ping_f );
 	Cmd_AddCommand( "serverstatus", CL_ServerStatus_f );
-	Cmd_AddCommand( "showip", CL_ShowIP_f );
 
 	Cmd_AddCommand( "updatescreen", SCR_UpdateScreen );
 	// done.
@@ -2476,7 +2474,6 @@ void CL_Shutdown()
 	Cmd_RemoveCommand( "globalservers" );
 	Cmd_RemoveCommand( "ping" );
 	Cmd_RemoveCommand( "serverstatus" );
-	Cmd_RemoveCommand( "showip" );
 
 	CL_ClearKeyBinding();
 	CL_ClearInput();
@@ -2496,16 +2493,6 @@ void CL_Shutdown()
 
 }
 
-/*
-==================
-CL_ShowIP_f
-==================
-*/
-void CL_ShowIP_f()
-{
-	Sys_ShowIP();
-}
-
 /*
 ====================
 CL_GetClipboardData

src/engine/qcommon/net_ip.cpp

@@ -170,6 +170,7 @@ struct nip_localaddr_t
 	struct sockaddr_storage netmask;
 };
 
+// Used for Sys_IsLANAddress
 static nip_localaddr_t localIP[ MAX_IPS ];
 static int             numIP;
 
@@ -887,30 +888,32 @@ bool Sys_IsLANAddress( const netadr_t& adr )
 	return false;
 }
 
-/*
-==================
-Sys_ShowIP
-==================
-*/
-void Sys_ShowIP()
+class ShowIPCommand : public Cmd::StaticCmd
 {
-	int  i;
-	char addrbuf[ NET_ADDR_STR_MAX_LEN ];
+public:
+	ShowIPCommand() : StaticCmd("showip", Cmd::SERVER, "show addresses of network interfaces") {}
 
-	for ( i = 0; i < numIP; i++ )
+	void Run( const Cmd::Args & ) const override
 	{
-		Sys_SockaddrToString( addrbuf, sizeof( addrbuf ), ( struct sockaddr * ) &localIP[ i ].addr );
+		int  i;
+		char addrbuf[ NET_ADDR_STR_MAX_LEN ];
 
-		if ( localIP[ i ].type == netadrtype_t::NA_IP )
+		for ( i = 0; i < numIP; i++ )
 		{
-			Log::Notice( "IP: %s", addrbuf );
-		}
-		else if ( localIP[ i ].type == netadrtype_t::NA_IP6 )
-		{
-			Log::Notice( "IP6: %s", addrbuf );
+			Sys_SockaddrToString( addrbuf, sizeof( addrbuf ), ( struct sockaddr * ) &localIP[ i ].addr );
+
+			if ( localIP[ i ].type == netadrtype_t::NA_IP )
+			{
+				Print( "IP: %s", addrbuf );
+			}
+			else if ( localIP[ i ].type == netadrtype_t::NA_IP6 )
+			{
+				Print( "IP6: %s", addrbuf );
+			}
 		}
 	}
-}
+};
+static ShowIPCommand showipRegistration;
 
 //=============================================================================
 

src/engine/qcommon/sys.h

@@ -43,6 +43,5 @@ bool Sys_GetPacket(netadr_t *net_from, msg_t *net_message);
 bool Sys_StringToAdr(const char *s, netadr_t *a, netadrtype_t family);
 
 bool Sys_IsLANAddress(const netadr_t& adr);
-void Sys_ShowIP();
 
 #endif // ENGINE_QCOMMON_SYS_H_