Ejemplo n.º 1
0
        /// <summary> Generate a pseudo-random TCP header.
        /// </summary>
        public static byte[] generateRandomTCPHeader()
        {
            byte[] bytes = new byte[Packets.TCPFields_Fields.TCP_HEADER_LEN];

            // source port
            ArrayHelper.insertLong(bytes, randomPort(), Packets.TCPFields_Fields.TCP_SP_POS, Packets.TCPFields_Fields.TCP_PORT_LEN);

            // destination port
            ArrayHelper.insertLong(bytes, randomPrivilegedPort(), Packets.TCPFields_Fields.TCP_DP_POS, Packets.TCPFields_Fields.TCP_PORT_LEN);

            // sequence number
            ArrayHelper.insertLong(bytes, 0x00000000, Packets.TCPFields_Fields.TCP_SEQ_POS, Packets.TCPFields_Fields.TCP_SEQ_LEN);

            // acknowledgment number
            ArrayHelper.insertLong(bytes, 0x00000000, Packets.TCPFields_Fields.TCP_ACK_POS, Packets.TCPFields_Fields.TCP_ACK_LEN);

            // header length and flags (0x2 is syn).
            ArrayHelper.insertLong(bytes, 0xa002, Packets.TCPFields_Fields.TCP_FLAG_POS, Packets.TCPFields_Fields.TCP_FLAG_LEN);

            // window size
            ArrayHelper.insertLong(bytes, 0x0000, Packets.TCPFields_Fields.TCP_WIN_POS, Packets.TCPFields_Fields.TCP_WIN_LEN);

            // checksum. todo: generate real checksum
            ArrayHelper.insertLong(bytes, 0xcccc, Packets.TCPFields_Fields.TCP_CSUM_POS, Packets.TCPFields_Fields.TCP_CSUM_LEN);

            // urgent pointer
            ArrayHelper.insertLong(bytes, 0x0000, Packets.TCPFields_Fields.TCP_URG_POS, Packets.TCPFields_Fields.TCP_URG_LEN);

            return(bytes);
        }
Ejemplo n.º 2
0
        /// <summary> Generate a pseudo-random ARP header.
        /// </summary>
        public static byte[] generateRandomARPHeader()
        {
            byte[] bytes = new byte[Packets.ARPFields.ARP_HEADER_LEN];

            ArrayHelper.insertLong(bytes, Packets.ARPFields.ARP_ETH_ADDR_CODE, Packets.ARPFields.ARP_HW_TYPE_POS, Packets.ARPFields.ARP_ADDR_TYPE_LEN);
            ArrayHelper.insertLong(bytes, Packets.ARPFields.ARP_IP_ADDR_CODE, Packets.ARPFields.ARP_PR_TYPE_POS, Packets.ARPFields.ARP_ADDR_TYPE_LEN);
            ArrayHelper.insertLong(bytes, IPAddress.WIDTH, Packets.ARPFields.ARP_HW_LEN_POS, Packets.ARPFields.ARP_ADDR_SIZE_LEN);
            ArrayHelper.insertLong(bytes, MACAddress.WIDTH, Packets.ARPFields.ARP_PR_LEN_POS, Packets.ARPFields.ARP_ADDR_SIZE_LEN);
            ArrayHelper.insertLong(bytes, test(Settings.PROB_ARP_REQUEST)?Packets.ARPFields.ARP_OP_REQ_CODE:Packets.ARPFields.ARP_OP_REP_CODE, Packets.ARPFields.ARP_OP_POS, Packets.ARPFields.ARP_OP_LEN);
            ArrayHelper.insertLong(bytes, MACAddress.random(), Packets.ARPFields.ARP_S_HW_ADDR_POS, MACAddress.WIDTH);
            int srcAddress = IPAddress.random(Settings.SIM_NETWORK, Settings.SIM_NETMASK);

            ArrayHelper.insertLong(bytes, srcAddress, Packets.ARPFields.ARP_S_PR_ADDR_POS, IPAddress.WIDTH);
            ArrayHelper.insertLong(bytes, MACAddress.random(), Packets.ARPFields.ARP_T_HW_ADDR_POS, MACAddress.WIDTH);

            int dstAddress = srcAddress;
            int count      = 0;

            // cheezy way to make sure that the source and dest address aren't the same
            while (dstAddress == srcAddress && count++ < randomRetryCount)
            {
                dstAddress = IPAddress.random(Settings.SIM_NETWORK, Settings.SIM_NETMASK);
            }
            ArrayHelper.insertLong(bytes, dstAddress, Packets.ARPFields.ARP_T_PR_ADDR_POS, IPAddress.WIDTH);

            return(bytes);
        }
Ejemplo n.º 3
0
        /// <summary> Generate a pseudo-random ICMP header.
        /// </summary>
        public static byte[] generateRandomICMPHeader()
        {
            byte[] bytes = new byte[Packets.ICMPFields.ICMP_HEADER_LEN];

            // code (message type)
            ArrayHelper.insertLong(bytes, randomICMPType(), Packets.ICMPFields.ICMP_CODE_POS, Packets.ICMPFields.ICMP_CODE_LEN);

            // subcode
            ArrayHelper.insertLong(bytes, 0x0, Packets.ICMPFields.ICMP_SUBC_POS, Packets.ICMPFields.ICMP_SUBC_LEN);

            // checksum. todo: generate real checksum
            ArrayHelper.insertLong(bytes, 0xcccc, Packets.ICMPFields.ICMP_CSUM_POS, Packets.ICMPFields.ICMP_CSUM_LEN);

            return(bytes);
        }
Ejemplo n.º 4
0
        /// <summary> Generate a pseudo-random IP header.
        /// </summary>
        public static byte[] generateRandomIPHeader()
        {
            byte[] bytes = new byte[Packets.IPFields_Fields.IP_HEADER_LEN];

            // ipv4. WARNING: only IPv4 is currently supported
            ArrayHelper.insertLong(bytes, 0x45, Packets.IPFields_Fields.IP_VER_POS, Packets.IPFields_Fields.IP_VER_LEN);

            // specify no special handling flag in type of service code
            ArrayHelper.insertLong(bytes, 0x2, Packets.IPFields_Fields.IP_TOS_POS, Packets.IPFields_Fields.IP_TOS_LEN);

            // random packet contains only a header, no payload
            ArrayHelper.insertLong(bytes, Packets.IPFields_Fields.IP_HEADER_LEN, Packets.IPFields_Fields.IP_LEN_POS, Packets.IPFields_Fields.IP_LEN_LEN);

            // increment id each time a packet is generated
            ArrayHelper.insertLong(bytes, fakeId++, Packets.IPFields_Fields.IP_ID_POS, Packets.IPFields_Fields.IP_ID_LEN);

            // header length and flags (none specified)..
            ArrayHelper.insertLong(bytes, 0x4000, Packets.IPFields_Fields.IP_FRAG_POS, Packets.IPFields_Fields.IP_FRAG_LEN);

            // time-to-live
            ArrayHelper.insertLong(bytes, 0xff, Packets.IPFields_Fields.IP_TTL_POS, Packets.IPFields_Fields.IP_TTL_LEN);

            // protocol
            ArrayHelper.insertLong(bytes, randomIPProtocol(), Packets.IPFields_Fields.IP_CODE_POS, Packets.IPFields_Fields.IP_CODE_LEN);

            // checksum. todo: generate real checksum
            ArrayHelper.insertLong(bytes, 0xcccc, Packets.IPFields_Fields.IP_CSUM_POS, Packets.IPFields_Fields.IP_CSUM_LEN);

            int srcAddress = IPAddress.random(Settings.SIM_NETWORK, Settings.SIM_NETMASK);

            // source ip
            ArrayHelper.insertLong(bytes, srcAddress, Packets.IPFields_Fields.IP_SRC_POS, IPAddress.WIDTH);

            int dstAddress = srcAddress;
            int count      = 0;

            // cheezy way to make sure that the source and dest address aren't the same
            while (dstAddress == srcAddress && count++ < randomRetryCount)
            {
                dstAddress = IPAddress.random(Settings.SIM_NETWORK, Settings.SIM_NETMASK);
            }
            // dest ip
            ArrayHelper.insertLong(bytes, dstAddress, Packets.IPFields_Fields.IP_DST_POS, IPAddress.WIDTH);

            return(bytes);
        }
Ejemplo n.º 5
0
        /// <summary> Generate a pseudo-random TCP header.
        /// </summary>
        public static byte[] generateRandomUDPHeader()
        {
            byte[] bytes = new byte[Packets.UDPFields_Fields.UDP_HEADER_LEN];

            // source port
            ArrayHelper.insertLong(bytes, randomPort(), Packets.UDPFields_Fields.UDP_SP_POS, Packets.UDPFields_Fields.UDP_PORT_LEN);

            // destination port
            ArrayHelper.insertLong(bytes, randomPort(), Packets.UDPFields_Fields.UDP_DP_POS, Packets.UDPFields_Fields.UDP_PORT_LEN);

            // length
            ArrayHelper.insertLong(bytes, Packets.UDPFields_Fields.UDP_HEADER_LEN, Packets.UDPFields_Fields.UDP_LEN_POS, Packets.UDPFields_Fields.UDP_PORT_LEN);

            // checksum. todo: generate real checksum
            ArrayHelper.insertLong(bytes, 0xcccc, Packets.UDPFields_Fields.UDP_CSUM_POS, Packets.UDPFields_Fields.UDP_CSUM_LEN);

            return(bytes);
        }
Ejemplo n.º 6
0
        /// <summary> Generate a pseudo-random ethernet header.
        /// </summary>
        public static byte[] generateRandomEthernetHeader()
        {
            byte[] bytes = new byte[Packets.EthernetFields.ETH_HEADER_LEN];

            long dst = MACAddress.random();

            ArrayHelper.insertLong(bytes, dst, Packets.EthernetFields.ETH_DST_POS, MACAddress.WIDTH);

            long src = MACAddress.random();

            ArrayHelper.insertLong(bytes, src, Packets.EthernetFields.ETH_SRC_POS, MACAddress.WIDTH);

            int type = randomEthernetProtocol();

            ArrayHelper.insertLong(bytes, type, Packets.EthernetFields.ETH_CODE_POS, Packets.EthernetFields.ETH_CODE_LEN);

            return(bytes);
        }