Patches for IPv6 to Work

mdl/m_io_sockets.pas

@@ -1,5 +1,8 @@
 Unit m_io_Sockets;
 
+{$link m_resolve_address.o}
+{$linklib c}
+
 {$I M_OPS.PAS}
 
 {.$DEFINE TNDEBUG}
@@ -59,7 +62,7 @@ Type
     Function    SetBlocking     (Block: Boolean): LongInt;
     Function    WaitForData     (TimeOut: LongInt) : LongInt; Override;
     Function    Connect         (Address: String; Port: Word) : Boolean;
-    Function    ResolveAddress  (Host: String) : LongInt;
+    Function 	ResolveAddress 	(Host: String; Remote_Address: PChar):Integer;
     Procedure   WaitInit        (NetInterface: String; Port: Word);
     Function    WaitConnection  (TimeOut: LongInt) : TIOSocket;
 
@@ -326,7 +329,15 @@ Procedure TIOSocket.TelnetInBuffer (Var Buf: TIOBuffer; Var Len: LongInt);
 
     {$IFDEF TNDEBUG}
       TNLOG ('InBuffer -> Sending data response');
+
+
+
+
+
+
     {$ENDIF}
+
+
   End;
 
 Var
@@ -559,57 +570,83 @@ Begin
   {$ENDIF}
 End;
 
-Function TIOSocket.ResolveAddress (Host: String) : LongInt;
+Function ResolveAddress_IPv6(Host:PChar; Remote_Address:PChar):Integer; cdecl; external;
-Var
-  HostEnt : PHostEnt;
-Begin
-  Host    := Host + #0;
-  HostEnt := GetHostByName(@Host[1]);
 
-  If Assigned(HostEnt) Then
+Function TIOSocket.ResolveAddress (Host: String; Remote_Address: pchar):Integer;
-    Result := PInAddr(HostEnt^.h_addr_list^)^.S_addr
+Begin
-  Else
+        Host := Host + Char(0);
-    Result := LongInt(StrToNetAddr(Host));
+	Result := ResolveAddress_IPv6(@Host, Remote_Address);
 End;
 
 Function TIOSocket.Connect (Address: String; Port: Word) : Boolean;
 Var
-  Sin : TINetSockAddr;
+	Sin6     	:  TINetSockAddr6;
+	Sin4     	:  TINetSockAddr;
+	Remote_Addr 	:  String;
+	Family   	:  Integer;
 Begin
-  Result        := False;
+	Result := False;
-  FSocketHandle := fpSocket(PF_INET, SOCK_STREAM, 0);
+	Family := 0;
+	Remote_Addr := '';
 	
-  If FSocketHandle = -1 Then Exit;
+	Family := ResolveAddress (Address, @Remote_Addr);
 
-  FPeerName := Address;
+	if Family = 0 Then Begin
+		if Pos(Address, ':') > 0 then Begin
+			Family := AF_INET6;
+			Remote_Addr := Address;
+		End else Begin
+			Family := AF_INET;
+			Remote_Addr := Address;
+		End;
+	End;
 
-  FillChar(Sin, SizeOf(Sin), 0);
+ 	FSocketHandle := fpSocket(Family, SOCK_STREAM, 0);
+ 	If FSocketHandle = -1 Then Begin
+		Exit;
+	End;
 
-  Sin.sin_Family      := PF_INET;
+  	FPeerName := Address;
-  Sin.sin_Port        := htons(Port);
-  Sin.sin_Addr.S_Addr := ResolveAddress(Address);
         
-  FPeerIP := NetAddrToStr(Sin.Sin_Addr);
+	if Family = AF_INET6 then Begin
-  Result  := fpConnect(FSocketHandle, @Sin, SizeOf(Sin)) = 0;
+		FillChar(Sin6, SizeOf(Sin6), 0);
+		Sin6.sin6_Family   := AF_INET6;
+		Sin6.sin6_Port     := htons(Port);
+		Sin6.sin6_Addr     := StrToNetAddr6(Remote_Addr);
+		FPeerIP 	   := NetAddrToStr6(Sin6.Sin6_addr);
+		Result   	   := fpConnect(FSocketHandle, @Sin6, SizeOf(Sin6)) = 0;
+	End else Begin
+		FillChar(Sin4, SizeOf(Sin4), 0);
+		Sin4.sin_Family    := AF_INET;
+		Sin4.sin_Port      := htons(Port);
+		Sin4.sin_Addr      := StrToNetAddr(Remote_Addr);
+		FPeerIP   	   := NetAddrToStr(Sin4.Sin_addr);
+		Result  	   := fpConnect(FSocketHandle, @Sin4, SizeOf(Sin4)) = 0;
+	End;
 End;
 
 Procedure TIOSocket.WaitInit (NetInterface: String; Port: Word);
 Var
-  SIN : TINetSockAddr;
+  SIN : TINetSockAddr6;
   Opt : LongInt;
 Begin
-  FSocketHandle := fpSocket(PF_INET, SOCK_STREAM, 0);
+  If NetInterface = '0.0.0.0' Then
+  	NetInterface := '::'
+  else if NetInterface = '127.0.0.1' then
+	NetInterface := '::1';
+
+  FSocketHandle := fpSocket(AF_INET6, SOCK_STREAM, 0);
 
   Opt := 1;
 
   fpSetSockOpt (FSocketHandle, SOL_SOCKET, SO_REUSEADDR, @Opt, SizeOf(Opt));
 
-  SIN.sin_family := PF_INET;
+  SIN.sin6_family := AF_INET6;
-  SIN.sin_port   := htons(Port);
+  SIN.sin6_port   := htons(Port);
-  SIN.sin_addr   := StrToNetAddr(NetInterface);
+  SIN.sin6_addr   := StrToNetAddr6(NetInterface);
 
   {$IFDEF TNDEBUG}
-    TNLOG('Attempting to bind to interface ' + NetInterface + ' (' + strI2S(SIN.sin_addr.s_addr) + ')');
+    TNLOG('Attempting to bind to interface ' + NetInterface + ' (' + strI2S(SIN.sin6_addr) + ')');
     TNLOG('WaitInit Bind');
 
     If fpBind(FSocketHandle, @SIN, SizeOf(SIN)) <> 0 Then
@@ -628,9 +665,11 @@ Var
   Sock   : LongInt;
   Client : TIOSocket;
   PHE    : PHostEnt;
-  SIN    : TINetSockAddr;
+  SIN    : TINetSockAddr6;
   Temp   : LongInt;
   SL     : TSockLen;
+  Code   : Integer;
+  Hold	 : LongInt;
 Begin
   Result := NIL;
 
@@ -656,8 +695,26 @@ Begin
 
   If Sock = -1 Then Exit;
 
-  FPeerIP := NetAddrToStr(SIN.sin_addr);
+  {
-  PHE     := GetHostByAddr(@SIN.sin_addr, 4, PF_INET);
+	We Need to Determine if this is actually IPv4 Mapped as Six
+	so that we can display and store the IP 4 Address.  This is 
+	necessary to we can make FTP and BINKP work properly by
+	opening returning ports on IPv4 and not IPv6, which won't work
+        nor clear firewall with input accept established rule, the norm.
+  }
+  FPeerIP := Upcase(NetAddrToStr6(SIN.sin6_addr));
+  if Length (FPeerIP) > 7 Then
+	Begin
+		If Pos('::FFFF:', FPeerIP) = 1 Then			// Is IPv4 mapped in 6?
+		Begin
+			Delete(FPeerIP, 1, 7);				// Strip off ::FFFF:
+                        Delete(FPeerIP, 5, 1);				// Remove middle :
+                        val('$' + FPeerIP, Hold, Code);		        // Convert to IPv4 Addy
+		     	FPeerIP := HostAddrToStr(in_addr(Hold));
+		End;
+	End;
+ 
+  PHE     := GetHostByAddr(@SIN.sin6_addr, 16, AF_INET6);
 
   If Not Assigned(PHE) Then
     FPeerName := 'Unknown'
@@ -668,7 +725,7 @@ Begin
 
   fpGetSockName(FSocketHandle, @SIN, @SL);
 
-  FHostIP := NetAddrToStr(SIN.sin_addr);
+  FHostIP := NetAddrToStr6(SIN.sin6_addr);
   Client  := TIOSocket.Create;
 
   Client.SocketHandle  := Sock;

mdl/m_resolve_address.c

@@ -0,0 +1,54 @@
+#include <sys/socket.h>
+#include <stdio.h>
+#include <netdb.h>
+#include <string.h> 
+#include <unistd.h> 
+#include <stdlib.h>
+#include <arpa/inet.h>
+
+int32_t ResolveAddress_IPv6(const char *host, char *remote_address);
+
+int32_t ResolveAddress_IPv6(const char *host, char *remote_address)
+{
+	struct 		addrinfo *result;
+	struct 		addrinfo hints;
+	int 		error;		
+	char		*ptr_address;
+
+	ptr_address = remote_address + 1;
+
+	// Let's get the Ipv6 address if it exists
+	memset (&hints, 0, sizeof(hints));
+
+	hints.ai_family = AF_INET6; 		
+	hints.ai_socktype = SOCK_STREAM;
+
+	error = getaddrinfo(&host[1], 0, &hints, &result);
+
+	if (error == 0) {
+		inet_ntop(AF_INET6, &(((struct sockaddr_in6 *)(result->ai_addr))->sin6_addr), ptr_address, INET6_ADDRSTRLEN);
+		*remote_address = (char) strlen(ptr_address);
+		freeaddrinfo(result);
+		return AF_INET6;
+	}
+
+	// Nope, Let us check for an ipv4 address
+
+	memset (&hints, 0, sizeof(hints));
+
+	hints.ai_family = AF_INET; 		
+	hints.ai_socktype = SOCK_STREAM;
+
+	error = getaddrinfo(&host[1], 0, &hints, &result);
+
+	if (error == 0) {
+   		inet_ntop(AF_INET, &(((struct sockaddr_in *)(result->ai_addr))->sin_addr), ptr_address, INET6_ADDRSTRLEN);
+		*remote_address = (char) strlen(ptr_address);
+		freeaddrinfo(result);
+		return AF_INET;
+	}
+
+	remote_address = 0;
+	return 0;
+}
+

mdl/m_socket_class.pas

@@ -1,5 +1,8 @@
 Unit m_Socket_Class;
 
+{$link m_resolve_address.o}
+{$linklib c}
+
 {$I M_OPS.PAS}
 
 Interface
@@ -18,7 +21,8 @@ Uses
   {$ENDIF}
   Sockets,
   m_DateTime,
-  m_Strings;
+  m_Strings,
+  libmysticbbs;
 
 Const
   TSocketBufferSize = 8 * 1024 - 1;
@@ -66,7 +70,7 @@ Type
     Function    SetBlocking     (Block: Boolean): LongInt;
     Function    WaitForData     (TimeOut: LongInt) : LongInt;
     Function    Connect         (Address: String; Port: Word) : Boolean;
-    Function    ResolveAddress  (Host: String) : LongInt;
+    Function 	ResolveAddress 	(Host: String; Remote_Address: PChar):Integer;
     Procedure   WaitInit        (Port: Word);
     Function    WaitConnection  : TSocketClass;
     Procedure   PurgeInputData;
@@ -490,80 +494,141 @@ Begin
   {$ENDIF}
 End;
 
-Function TSocketClass.ResolveAddress (Host: String) : LongInt;
+Function ResolveAddress_IPv6(Host:PChar; Remote_Address:PChar):Integer; cdecl; external;
-Var
-  HostEnt : PHostEnt;
-Begin
-  Host    := Host + #0;
-  HostEnt := GetHostByName(@Host[1]);
 
-  If Assigned(HostEnt) Then
+Function TIOSocket.ResolveAddress (Host: String; Remote_Address: pchar):Integer;
-    Result := PInAddr(HostEnt^.h_addr_list^)^.S_addr
+Begin
-  Else
+        Host := Host + Char(0);
-    Result := LongInt(StrToNetAddr(Host));
+	Result := ResolveAddress_IPv6(@Host, Remote_Address);
 End;
 
-Function TSocketClass.Connect (Address: String; Port: Word) : Boolean;
+Function TIOSocket.Connect (Address: String; Port: Word) : Boolean;
 Var
-  Sin : TINetSockAddr;
+	Sin6     	:  TINetSockAddr6;
+	Sin4     	:  TINetSockAddr;
+	Remote_Addr 	:  String;
+	Family   	:  Integer;
 Begin
-  Result        := False;
+	Result := False;
-  FSocketHandle := fpSocket(PF_INET, SOCK_STREAM, 0);
+	Family := 0;
+	Remote_Addr := '';
 	
-  If FSocketHandle = -1 Then Exit;
+	Family := ResolveAddress (Address, @Remote_Addr);
 
-  FPeerName := Address;
+	if Family = 0 Then Begin
+		if Pos(Address, ':') > 0 then Begin
+			Family := AF_INET6;
+			Remote_Addr := Address;
+		End else Begin
+			Family := AF_INET;
+			Remote_Addr := Address;
+		End;
+	End;
 
-  FillChar(Sin, SizeOf(Sin), 0);
+ 	FSocketHandle := fpSocket(Family, SOCK_STREAM, 0);
+ 	If FSocketHandle = -1 Then Begin
+		Exit;
+	End;
 
-  Sin.sin_Family      := PF_INET;
+  	FPeerName := Address;
-  Sin.sin_Port        := htons(Port);
-  Sin.sin_Addr.S_Addr := ResolveAddress(Address);
         
-  FPeerIP := NetAddrToStr(Sin.Sin_Addr);
+	if Family = AF_INET6 then Begin
-  Result  := fpConnect(FSocketHandle, @Sin, SizeOf(Sin)) = 0;
+		FillChar(Sin6, SizeOf(Sin6), 0);
+		Sin6.sin6_Family   := AF_INET6;
+		Sin6.sin6_Port     := htons(Port);
+		Sin6.sin6_Addr     := StrToNetAddr6(Remote_Addr);
+		FPeerIP 	   := NetAddrToStr6(Sin6.Sin6_addr);
+		Result   	   := fpConnect(FSocketHandle, @Sin6, SizeOf(Sin6)) = 0;
+	End else Begin
+		FillChar(Sin4, SizeOf(Sin4), 0);
+		Sin4.sin_Family    := AF_INET;
+		Sin4.sin_Port      := htons(Port);
+		Sin4.sin_Addr      := StrToNetAddr(Remote_Addr);
+		FPeerIP   	   := NetAddrToStr(Sin4.Sin_addr);
+		Result  	   := fpConnect(FSocketHandle, @Sin4, SizeOf(Sin4)) = 0;
+	End;
 End;
 
-Procedure TSocketClass.WaitInit (Port: Word);
+Procedure TIOSocket.WaitInit (NetInterface: String; Port: Word);
 Var
-  SIN : TINetSockAddr;
+  SIN : TINetSockAddr6;
   Opt : LongInt;
 Begin
-  FSocketHandle := fpSocket(PF_INET, SOCK_STREAM, 0);
+  If NetInterface = '0.0.0.0' Then
+  	NetInterface := '::'
+  else if NetInterface = '127.0.0.1' then
+	NetInterface := '::1';
+
+  FSocketHandle := fpSocket(AF_INET6, SOCK_STREAM, 0);
 
   Opt := 1;
 
   fpSetSockOpt (FSocketHandle, SOL_SOCKET, SO_REUSEADDR, @Opt, SizeOf(Opt));
 
-  SIN.sin_family      := PF_INET;
+  SIN.sin6_family := AF_INET6;
-  SIN.sin_addr.s_addr := 0;
+  SIN.sin6_port   := htons(Port);
-  SIN.sin_port        := htons(Port);
+  SIN.sin6_addr   := StrToNetAddr6(NetInterface);
 
   fpBind(FSocketHandle, @SIN, SizeOf(SIN));
 
   SetBlocking(True);
 End;
 
-Function TSocketClass.WaitConnection : TSocketClass;
+Function TIOSocket.WaitConnection (TimeOut: LongInt) : TIOSocket;
 Var
   Sock   : LongInt;
-  Client : TSocketClass;
+  Client : TIOSocket;
   PHE    : PHostEnt;
-  SIN    : TINetSockAddr;
+  SIN    : TINetSockAddr6;
   Temp   : LongInt;
   SL     : TSockLen;
+  Code   : Integer;
+  Hold	 : LongInt;
 Begin
   Result := NIL;
 
-  If fpListen(FSocketHandle, 5) = -1 Then Exit;
+  If TimeOut > 0 Then Begin
+    SetBlocking(False);
+
+    If fpListen(FSocketHandle, 5) = -1 Then Begin
+      SetBlocking(True);
+
+      Exit;
+    End;
+
+    If WaitForData(TimeOut) <= 0 Then Begin
+      SetBlocking(True);
+
+      Exit;
+    End;
+  End Else
+    If fpListen(FSocketHandle, 5) = -1 Then Exit;
 
   Temp := SizeOf(SIN);
   Sock := fpAccept(FSocketHandle, @SIN, @Temp);
 
   If Sock = -1 Then Exit;
 
-  FPeerIP := NetAddrToStr(SIN.sin_addr);
+  {
-  PHE     := GetHostByAddr(@SIN.sin_addr, 4, PF_INET);
+	We Need to Determine if this is actually IPv4 Mapped as Six
+	so that we can display and store the IP 4 Address.  This is 
+	necessary to we can make FTP and BINKP work properly by
+	opening returning ports on IPv4 and not IPv6, which won't work
+        nor clear firewall with input accept established rule, the norm.
+  }
+  FPeerIP := Upcase(NetAddrToStr6(SIN.sin6_addr));
+  if Length (FPeerIP) > 7 Then
+	Begin
+		If Pos('::FFFF:', FPeerIP) = 1 Then			// Is IPv4 mapped in 6?
+		Begin
+			Delete(FPeerIP, 1, 7);				// Strip off ::FFFF:
+                        Delete(FPeerIP, 5, 1);				// Remove middle :
+                        val('$' + FPeerIP, Hold, Code);		        // Convert to IPv4 Addy
+		     	FPeerIP := HostAddrToStr(in_addr(Hold));
+		End;
+	End;
+ 
+  PHE     := GetHostByAddr(@SIN.sin6_addr, 16, AF_INET6);
 
   If Not Assigned(PHE) Then
     FPeerName := 'Unknown'
@@ -574,8 +639,8 @@ Begin
 
   fpGetSockName(FSocketHandle, @SIN, @SL);
 
-  FHostIP := NetAddrToStr(SIN.sin_addr);
+  FHostIP := NetAddrToStr6(SIN.sin6_addr);
-  Client  := TSocketClass.Create;
+  Client  := TIOSocket.Create;
 
   Client.SocketHandle  := Sock;
   Client.PeerName      := FPeerName;

mdl/m_socket_server.pas

@@ -196,7 +196,8 @@ Begin
   Repeat Until Server <> NIL;  // Synchronize with server class
   Repeat Until ServerStatus <> NIL; // Syncronize with status class
 
-  Server.WaitInit('0.0.0.0', Port);
+  //Server.WaitInit('0.0.0.0', Port);
+  Server.WaitInit('::', Port);
 
   If Terminated Then Exit;