public void Calculate_AddressSOCK(byte AType) {
switch (AType) {
// Version IP 4
case 0x01:
RemoteHost = Tools.calcInetAddress(DST_Addr);
RemotePort = Tools.calcPort(DST_Port);
break;
// Version IP DOMAIN NAME
case 0x03:
if (DST_Addr[0] <= 0) {
Logs.Println(
Logger.ERROR,
"SOCKS 5 - calcInetAddress() : BAD IP in command - size : " + DST_Addr[0],
true);
return;
}
String sIA = "";
for (int i = 1; i <= DST_Addr[0]; i++) {
sIA += (char) DST_Addr[i];
}
RemoteHost = sIA;
RemotePort = Tools.calcPort(DST_Port);
break;
}
}
public void GetClientCommand() throws Exception {
// +----+-----+-------+------+----------+----------+
// |VER | CMD | RSV | ATYP | DST.ADDR | DST.PORT |
// +----+-----+-------+------+----------+----------+
// | 1 | 1 | X'00' | 1 | Variable | 2 |
// +----+-----+-------+------+----------+----------+
int Addr_Len;
SOCKS_Version = GetByte();
Command = GetByte();
RSV = GetByte();
ATYP = GetByte();
// Address
Addr_Len = ADDR_Size[ATYP];
DST_Addr[0] = GetByte(); // Shift Out " " 0x0e
if (ATYP == 0x03) {
Addr_Len = DST_Addr[0] + 1; // | len | [0]SO | 192 .... |
}
for (int i = 1; i < Addr_Len; i++) {
DST_Addr[i] = GetByte();
}
// Port
DST_Port[0] = GetByte();
DST_Port[1] = GetByte();
// ---------------------
if (SOCKS_Version != SOCKS5_Version) {
Logs.Println(
Logger.ERROR, "SOCKS 5 - Incorrect SOCKS Version of Command: " + SOCKS_Version, true);
Refuse_Command((byte) 0xFF);
throw new Exception("Incorrect SOCKS Version of Command: " + SOCKS_Version);
}
if ((Command < SC_CONNECT) || (Command > SC_UDP)) {
Logs.Println(
Logger.ERROR,
"SOCKS 5 - GetClientCommand() - Unsupported Command : \"" + commName(Command) + "\"",
true);
Refuse_Command((byte) 0x07);
throw new Exception("SOCKS 5 - Unsupported Command: \"" + Command + "\"");
}
if (ATYP == 0x04) {
Logs.Println(
Logger.ERROR, "SOCKS 5 - GetClientCommand() - Unsupported Address Type - IP v6", true);
Refuse_Command((byte) 0x08);
throw new Exception("Unsupported Address Type - IP v6");
}
if ((ATYP >= 0x04) || (ATYP <= 0)) {
Logs.Println(
Logger.ERROR, "SOCKS 5 - GetClientCommand() - Unsupported Address Type: " + ATYP, true);
Refuse_Command((byte) 0x08);
throw new Exception("SOCKS 5 - Unsupported Address Type: " + ATYP);
}
if (!Calculate_Address()) { // Gets the IP Address
Refuse_Command((byte) 0x04); // Host Not Exists...
throw new Exception("SOCKS 5 - Unknown Host/IP address '" + RemoteHost.toString() + "'");
}
Logs.Println(
Logger.INFO, "SOCKS 5 - Accepted SOCKS5 Command: \"" + commName(Command) + "\"", true);
}