コード例 #1
0
        public ArpReplyPacket(Log log, RecvPacket recvPacket, byte [] mac)
        {
            EtherHeader etherHeader = new EtherHeader();

            etherHeader.dstMac = new byte[] { 0, 0, 0, 0, 0, 0 };
            etherHeader.srcMac = new byte[] { 0, 0, 0, 0, 0, 0 };

            ArpHeader arpHeader = new ArpHeader();

            arpHeader.srcIp  = new byte[] { 0, 0, 0, 0 };
            arpHeader.dstIp  = new byte[] { 0, 0, 0, 0 };
            arpHeader.srcMac = new byte[] { 0, 0, 0, 0, 0, 0 };
            arpHeader.dstMac = new byte[] { 0, 0, 0, 0, 0, 0 };

            var arpHeaderLen   = Marshal.SizeOf(arpHeader);
            var etherHeaderLen = Marshal.SizeOf(etherHeader);

            Buf = new byte[etherHeaderLen + arpHeaderLen];

            Buffer.BlockCopy(recvPacket.etherHeader.srcMac, 0, etherHeader.dstMac, 0, 6);
            Buffer.BlockCopy(mac, 0, etherHeader.srcMac, 0, 6);
            etherHeader.type = recvPacket.etherHeader.type;


            Buffer.BlockCopy(recvPacket.arpHeader.srcMac, 0, arpHeader.dstMac, 0, 6);
            Buffer.BlockCopy(recvPacket.arpHeader.srcIp, 0, arpHeader.dstIp, 0, 4);
            Buffer.BlockCopy(mac, 0, arpHeader.srcMac, 0, 6);
            Buffer.BlockCopy(recvPacket.arpHeader.dstIp, 0, arpHeader.srcIp, 0, 4);

            arpHeader.code     = 0x0200;//応答
            arpHeader.hwLen    = recvPacket.arpHeader.hwLen;
            arpHeader.hwType   = recvPacket.arpHeader.hwType;
            arpHeader.protoLen = recvPacket.arpHeader.protoLen;
            arpHeader.type     = recvPacket.arpHeader.type;


            unsafe
            {
                fixed(byte *p = Buf)
                {
                    var offSet = 0;

                    Marshal.StructureToPtr(etherHeader, new IntPtr(p + offSet), true);
                    offSet += 14;
                    Marshal.StructureToPtr(arpHeader, new IntPtr(p + offSet), true);
                }
            }
        }
コード例 #2
0
        public ArpReplyPacket(Log log,RecvPacket recvPacket,byte [] mac)
        {
            EtherHeader etherHeader = new EtherHeader();
            etherHeader.dstMac = new byte[] { 0, 0, 0, 0, 0, 0 };
            etherHeader.srcMac = new byte[] { 0, 0, 0, 0, 0, 0 };

            ArpHeader arpHeader = new ArpHeader();
            arpHeader.srcIp = new byte[] { 0, 0, 0, 0 };
            arpHeader.dstIp = new byte[] { 0, 0, 0, 0 };
            arpHeader.srcMac = new byte[] { 0, 0, 0, 0, 0, 0 };
            arpHeader.dstMac = new byte[] { 0, 0, 0, 0, 0, 0 };

            var arpHeaderLen = Marshal.SizeOf(arpHeader);
            var etherHeaderLen = Marshal.SizeOf(etherHeader);

            Buf = new byte[etherHeaderLen + arpHeaderLen];

            Buffer.BlockCopy(recvPacket.etherHeader.srcMac, 0, etherHeader.dstMac, 0, 6);
            Buffer.BlockCopy(mac, 0, etherHeader.srcMac, 0, 6);
            etherHeader.type = recvPacket.etherHeader.type;

            Buffer.BlockCopy(recvPacket.arpHeader.srcMac, 0, arpHeader.dstMac, 0, 6);
            Buffer.BlockCopy(recvPacket.arpHeader.srcIp, 0, arpHeader.dstIp, 0, 4);
            Buffer.BlockCopy(mac, 0, arpHeader.srcMac, 0, 6);
            Buffer.BlockCopy(recvPacket.arpHeader.dstIp, 0, arpHeader.srcIp, 0, 4);

            arpHeader.code = 0x0200;//応答
            arpHeader.hwLen = recvPacket.arpHeader.hwLen;
            arpHeader.hwType = recvPacket.arpHeader.hwType;
            arpHeader.protoLen = recvPacket.arpHeader.protoLen;
            arpHeader.type = recvPacket.arpHeader.type;

            unsafe {
                fixed (byte* p = Buf) {
                    var offSet=0;
                    Marshal.StructureToPtr(etherHeader, new IntPtr(p + offSet), true);
                    offSet += 14;
                    Marshal.StructureToPtr(arpHeader, new IntPtr(p + offSet), true);
                }
            }
        }
コード例 #3
0
ファイル: RecvPacket.cs プロジェクト: furuya02/HideAndSeek
        public RecvPacket(byte [] b)
        {
            etherHeader = new EtherHeader();
            ipHeader = new IpHeader();
            tcpHeader = new TcpHeader();
            arpHeader = new ArpHeader();

            Mac = new List<byte[]> { null,null};
            Ip = new List<byte[]> { null, null };
            Port = new List<ushort> { 0, 0 };
            for (int i = 0; i < 2; i++) {
                Mac[i] = new byte[] { 0, 0, 0, 0, 0, 0 };
                Ip[i] = new byte[] { 0, 0, 0, 0 };
            }

            this.Buf = new byte[b.Length];
            Buffer.BlockCopy(b,0,Buf,0,b.Length);

            unsafe {
                int offSet = 0;
                fixed (byte* p = b) {
                    // Etherヘッダ処理
                    int etherHeaderSize = Marshal.SizeOf(etherHeader);
                    if (offSet + etherHeaderSize > b.Length) //  受信バイト数超過
                        return;
                    etherHeader = (EtherHeader)Marshal.PtrToStructure((IntPtr)(p + offSet), typeof(EtherHeader));
                    offSet += etherHeaderSize;

                    // Ether dst mac
                    Buffer.BlockCopy(etherHeader.dstMac, 0, Mac[(int)Sd.Dst], 0, 6);
                    Buffer.BlockCopy(etherHeader.srcMac, 0, Mac[(int)Sd.Src], 0, 6);

                    // Ether type
                    Type = (PType)Util.htons(etherHeader.type);

                    if (Type == PType.IP) {//IP

                        // IPヘッダ処理
                        int ipHeaderSize = Marshal.SizeOf(ipHeader);

                        if (offSet + ipHeaderSize > b.Length) //  受信バイト数超過
                            return;
                        ipHeader = (IpHeader)Marshal.PtrToStructure((IntPtr)(p + offSet), typeof(IpHeader));
                        var ipHeaderLen  = (ipHeader.verLen & 0x0F) * 4;
                        offSet += ipHeaderLen;

                        Len = Util.htons(ipHeader.totalLen);
                        Len -= (ushort)ipHeaderLen;

                        // プロトコル
                        Protocol = (Protocol)ipHeader.protocol;

                        // 送信元 IPアドレス
                        Buffer.BlockCopy(ipHeader.srcIp, 0, Ip[(int)Sd.Src], 0, 4);
                        // 送信先 IPアドレス
                        Buffer.BlockCopy(ipHeader.dstIp, 0, Ip[(int)Sd.Dst], 0, 4);

                        if (ipHeader.protocol == 6) { // TCP

                            // TCPヘッダ処理
                            int tcpHeaderSize = Marshal.SizeOf(tcpHeader);

                            if (offSet + tcpHeaderSize > b.Length) //  受信バイト数超過
                                return;
                            tcpHeader = (TcpHeader)Marshal.PtrToStructure((IntPtr)(p + offSet), typeof(TcpHeader));

                            var l = tcpHeader.offset >> 4;
                            var hedderLen = l*4;
                            Len -= (ushort)hedderLen;

                            if (Len != 0) {
                                Data = new byte[Len];
                                for (int i = 0; i < Len; i++) {
                                    Data[i] = (byte)*(p + offSet + hedderLen + i);
                                }
                            }

                            // 送信元ポート
                            Port[(int)Sd.Src] = Util.htons(tcpHeader.srcPort);
                            // 送信先ポート
                            Port[(int)Sd.Dst] = Util.htons(tcpHeader.dstPort);

                            Squence = Util.htons(tcpHeader.squence);
                            Ack = Util.htons(tcpHeader.ack);

                            Flg = tcpHeader.flg;
                        }
                    } else if (Type == PType.ARP) { //ARP
                        // Arpヘッダ処理
                        int arpHeaderSize = Marshal.SizeOf(arpHeader);
                        if (offSet + etherHeaderSize > b.Length) //  受信バイト数超過
                            return;
                        arpHeader = (ArpHeader)Marshal.PtrToStructure((IntPtr)(p + offSet), typeof(ArpHeader));
                        return;
                    } else {
                        return; // 未対応
                    }
                }
            }
        }
コード例 #4
0
        public RecvPacket(byte [] b)
        {
            etherHeader = new EtherHeader();
            ipHeader    = new IpHeader();
            tcpHeader   = new TcpHeader();
            arpHeader   = new ArpHeader();

            Mac = new List <byte[]> {
                null, null
            };
            Ip = new List <byte[]> {
                null, null
            };
            Port = new List <ushort> {
                0, 0
            };
            for (int i = 0; i < 2; i++)
            {
                Mac[i] = new byte[] { 0, 0, 0, 0, 0, 0 };
                Ip[i]  = new byte[] { 0, 0, 0, 0 };
            }

            this.Buf = new byte[b.Length];
            Buffer.BlockCopy(b, 0, Buf, 0, b.Length);

            unsafe {
                int offSet = 0;
                fixed(byte *p = b)
                {
                    // Etherヘッダ処理
                    int etherHeaderSize = Marshal.SizeOf(etherHeader);

                    if (offSet + etherHeaderSize > b.Length) //  受信バイト数超過
                    {
                        return;
                    }
                    etherHeader = (EtherHeader)Marshal.PtrToStructure((IntPtr)(p + offSet), typeof(EtherHeader));
                    offSet     += etherHeaderSize;

                    // Ether dst mac
                    Buffer.BlockCopy(etherHeader.dstMac, 0, Mac[(int)Sd.Dst], 0, 6);
                    Buffer.BlockCopy(etherHeader.srcMac, 0, Mac[(int)Sd.Src], 0, 6);

                    // Ether type
                    Type = (PType)Util.htons(etherHeader.type);

                    if (Type == PType.IP)  //IP

                    // IPヘッダ処理
                    {
                        int ipHeaderSize = Marshal.SizeOf(ipHeader);

                        if (offSet + ipHeaderSize > b.Length) //  受信バイト数超過
                        {
                            return;
                        }
                        ipHeader = (IpHeader)Marshal.PtrToStructure((IntPtr)(p + offSet), typeof(IpHeader));
                        var ipHeaderLen = (ipHeader.verLen & 0x0F) * 4;
                        offSet += ipHeaderLen;

                        Len  = Util.htons(ipHeader.totalLen);
                        Len -= (ushort)ipHeaderLen;

                        // プロトコル
                        Protocol = (Protocol)ipHeader.protocol;

                        // 送信元 IPアドレス
                        Buffer.BlockCopy(ipHeader.srcIp, 0, Ip[(int)Sd.Src], 0, 4);
                        // 送信先 IPアドレス
                        Buffer.BlockCopy(ipHeader.dstIp, 0, Ip[(int)Sd.Dst], 0, 4);

                        if (ipHeader.protocol == 6)   // TCP

                        // TCPヘッダ処理
                        {
                            int tcpHeaderSize = Marshal.SizeOf(tcpHeader);

                            if (offSet + tcpHeaderSize > b.Length) //  受信バイト数超過
                            {
                                return;
                            }
                            tcpHeader = (TcpHeader)Marshal.PtrToStructure((IntPtr)(p + offSet), typeof(TcpHeader));

                            var l         = tcpHeader.offset >> 4;
                            var hedderLen = l * 4;
                            Len -= (ushort)hedderLen;

                            if (Len != 0)
                            {
                                Data = new byte[Len];
                                for (int i = 0; i < Len; i++)
                                {
                                    Data[i] = (byte)*(p + offSet + hedderLen + i);
                                }
                            }

                            // 送信元ポート
                            Port[(int)Sd.Src] = Util.htons(tcpHeader.srcPort);
                            // 送信先ポート
                            Port[(int)Sd.Dst] = Util.htons(tcpHeader.dstPort);

                            Squence = Util.htons(tcpHeader.squence);
                            Ack     = Util.htons(tcpHeader.ack);

                            Flg = tcpHeader.flg;
                        }
                    }
                    else if (Type == PType.ARP)     //ARP
                    // Arpヘッダ処理
                    {
                        int arpHeaderSize = Marshal.SizeOf(arpHeader);
                        if (offSet + etherHeaderSize > b.Length) //  受信バイト数超過
                        {
                            return;
                        }
                        arpHeader = (ArpHeader)Marshal.PtrToStructure((IntPtr)(p + offSet), typeof(ArpHeader));
                        return;
                    }
                    else
                    {
                        return; // 未対応
                    }
                }
            }
        }