Sending IP Packet ?

Hello, I have this class in my project. I can open a socket and send ICMP packet. public class Ipheader { public byte Version; public byte HeaderLength; public byte DifferentiatedServicesField; public ushort Length; public ushort Identification; public byte Flags; public ushort FragmentOffset; public ushort TimeToLive; public byte Protocol; public ushort HeaderChecksum; public string Source; public string Destination; } Now i want to build a ICMP packet witht TTL = 1 in IP header. How can i do this ? And how how can i give this packet a version, length .... I have this 2 structs in C: struct in_addr src; struct sockaddr_in addr; is there something similar in C# ? links oder tuts maybe helpfull for me! regards

i have this class ICMP. i dont know if thats what you need or not. here is the code anyway: using System; using System.Net; using System.Text; public class Icmp { private byte type; private byte code; private UInt16 checksum; private byte[] message = new byte[1024]; private int messageSize; public Icmp() { } public Icmp(byte type, byte code, UInt16 checksum, byte[] message, int messageSize) { this.type = type; this.code = code; this.checksum = checksum; this.message = message; this.messageSize = messageSize; } public Icmp(byte[] data, int size) { type = data[20]; code = data[21]; checksum = BitConverter.ToUInt16(data, 22); messageSize = size - 24; Buffer.BlockCopy(data, 24, message, 0, messageSize); } public byte[] getBytes() { byte[] data = new byte[messageSize + 5]; Buffer.BlockCopy(BitConverter.GetBytes(type), 0, data, 0, 1); Buffer.BlockCopy(BitConverter.GetBytes(code), 0, data, 1, 1); Buffer.BlockCopy(BitConverter.GetBytes(checksum), 0, data, 2, 2); Buffer.BlockCopy(message, 0, data, 4, messageSize); return data; } public UInt16 getChecksum() { UInt32 checksum = 0; byte[] data = getBytes(); int packetSize = messageSize + 4; int index = 0; while ( index < packetSize) { checksum += Convert.ToUInt32(BitConverter.ToUInt16(data, index)); index += 2; } checksum = (checksum >> 16) + (checksum & 0xffff); checksum += (checksum >> 16); return (UInt16)(~checksum); } public byte Type { get {return type;} set {type = value;} } public byte Code { get {return code;} set {code = value;} } public UInt16 Checksum { get {return checksum;} set {checksum = value;} } public byte[] Message { get {return message;} set {message = value;} } public int MessageSize { get {return messageSize;} set {messageSize = value;} } } Good Luck

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alijabari22y ago
i have this class ICMP. i dont know if thats what you need or not. here is the code anyway: using System; using System.Net; using System.Text; public class Icmp { private byte type; private byte code; private UInt16 checksum; private byte[] message = new byte[1024]; private int messageSize; public Icmp() { } public Icmp(byte type, byte code, UInt16 checksum, byte[] message, int messageSize) { this.type = type; this.code = code; this.checksum = checksum; this.message = message; this.messageSize = messageSize; } public Icmp(byte[] data, int size) { type = data[20]; code = data[21]; checksum = BitConverter.ToUInt16(data, 22); messageSize = size - 24; Buffer.BlockCopy(data, 24, message, 0, messageSize); } public byte[] getBytes() { byte[] data = new byte[messageSize + 5]; Buffer.BlockCopy(BitConverter.GetBytes(type), 0, data, 0, 1); Buffer.BlockCopy(BitConverter.GetBytes(code), 0, data, 1, 1); Buffer.BlockCopy(BitConverter.GetBytes(checksum), 0, data, 2, 2); Buffer.BlockCopy(message, 0, data, 4, messageSize); return data; } public UInt16 getChecksum() { UInt32 checksum = 0; byte[] data = getBytes(); int packetSize = messageSize + 4; int index = 0; while ( index < packetSize) { checksum += Convert.ToUInt32(BitConverter.ToUInt16(data, index)); index += 2; } checksum = (checksum >> 16) + (checksum & 0xffff); checksum += (checksum >> 16); return (UInt16)(~checksum); } public byte Type { get {return type;} set {type = value;} } public byte Code { get {return code;} set {code = value;} } public UInt16 Checksum { get {return checksum;} set {checksum = value;} } public byte[] Message { get {return message;} set {message = value;} } public int MessageSize { get {return messageSize;} set {messageSize = value;} } } Good Luck