#include < amxmodx >

public plugin_init()
{
    register_plugin( "Test: IP Block", "1.0", "Rejack" );

    static szAddress[ 22 ];

    get_user_ip( 0, szAddress, charsmax( szAddress ), 0 );

    if ( !check_valid_plugin( szAddress, charsmax( szAddress ) ) )
        set_fail_state( "Failed to recognize server address." );
}

stock bool: check_valid_plugin( string[ ], len )
{
    static szNum[ 4 ][ 6 ], szPort[ 12 ];
    static iNum[ 4 ], iPort, i;

    replace_all( string, len, ".", " " );
    replace_all( string, len, ":", " " );

    parse( string, szNum[ 0 ], 5, szNum[ 1 ], 5, szNum[ 2 ], 5, szNum[ 3 ], 5, szPort, charsmax( szPort ) );

    for ( i = 0; i < 4; i++ )
        iNum[ i ]   = str_to_num( szNum[ i ] );

    iPort   = str_to_num( szPort );

    // Server ip address 212.119.191.31:27015

    if ( iNum[ 0 ] != 212 )     // 212.
        return false;

    if ( iNum[ 1 ] != 119 )     // 119.
        return false;

    if ( iNum[ 2 ] != 191 )     // 191.
        return false;

    if ( iNum[ 3 ] != 31 )      // 31
        return false;

    if ( iPort != 27015 )       // :27015
        return false;

    return true;
}