/*
* 0=Class A
* 1=Class B
* 2=Class C
* 3=Class D
* 4=Class E
* -1=error
*/
public int getNetworkClass()
{
// Test Class A: first bit=0
if (!IPTool.isBitSet(this.get1Byte(), 8))
{
return(0);
}
// Test Class B: first 2bit=10
else if (!IPTool.isBitSet(this.get1Byte(), 7))
{
return(1);
}
// Test Class C: first 3bit=110
else if (!IPTool.isBitSet(this.get1Byte(), 6))
{
return(2);
}
// Test Class D: first 4bit=1110
else if (!IPTool.isBitSet(this.get1Byte(), 5))
{
return(3);
}
// Test Class E: first 4bit=1111 ( = all other)
// else if (!IPTool.isBitSet(this.get1Byte(),8)) return 4;
else
{
return(4);
}
/*
* // Test Class A: first bit=0
* if ((this.get1Byte() | (byte)0x7f) == (byte)0x7f) return 0;
* // Test Class B: first 2bit=10
* if ((this.get1Byte() | 0xbf) == 0xbf) return 1;
* // Test Class C: first 3bit=110
* if ((this.get1Byte() | 0xdf) == 0xdf) return 2;
* // Test Class D: first 4bit=1110
* if ((this.get1Byte() | 0xef) == 0xef) return 3;
* // Test Class E: first 4bit=1111
* if ((this.get1Byte() & 0xf0) == 0xf0) return 4;
* return -1;
*/
}