Example #1
0
        /*
         * 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;
             */
        }