unsafe private void Unpack(byte[] buf, int len)//信号解码
{
byte protocol = 0;
uint version = 0;
uint ipSourceAddress = 0;
uint ipDestinationAddress = 0;
int sourcePort = 0;
int destinationPort = 0;
IPAddress ip;
Array.Copy(buf, CBTCPacketProperties.Buf, len);
CBTCPacketProperties.BufLength = len;
fixed(byte *FixedBuf = buf)
{
try
{
IPHeader *head = (IPHeader *)FixedBuf;
CBTCPacketProperties.IPHeaderLength = (uint)((head->versionAndLength & 0x0f) << 2);
protocol = head->protocol;
version = (uint)((head->versionAndLength & 0xf0) >> 4);
CBTCPacketProperties.Version = version.ToString();
ipSourceAddress = head->sourceAddress;
ipDestinationAddress = head->destinationAdress;
ip = new IPAddress(ipSourceAddress);
CBTCPacketProperties.OriginationAddress = ip.ToString();
ip = new IPAddress(ipDestinationAddress);
CBTCPacketProperties.DestinationAddress = ip.ToString();
sourcePort = buf[CBTCPacketProperties.IPHeaderLength] * 256 + buf[CBTCPacketProperties.IPHeaderLength + 1];
destinationPort = buf[CBTCPacketProperties.IPHeaderLength + 2] * 256 + buf[CBTCPacketProperties.IPHeaderLength + 3];
CBTCPacketProperties.OriginationPort = sourcePort.ToString();
CBTCPacketProperties.DestinationPort = destinationPort.ToString();
CBTCPacketProperties.PacketLength = (uint)len;
CBTCPacketProperties.MessageLength = CBTCPacketProperties.PacketLength - CBTCPacketProperties.IPHeaderLength;
CBTCPacketProperties.PacketBuffer = buf;
Array.Copy(buf, (int)CBTCPacketProperties.IPHeaderLength, CBTCPacketProperties.MessageBuffer, 0, (int)CBTCPacketProperties.MessageLength);
if (protocol == 17)
{
if (CBTCPacketProperties.DestinationPort == "2152")
{
int UDP_HEADER_LENGTH = 8;
//int GTP_MUST_CHOICE_LENGTH = 8;
int GTP_LENGTH_FLAG = 2;
int gtpMessegePayloadLength = buf[CBTCPacketProperties.IPHeaderLength + UDP_HEADER_LENGTH + GTP_LENGTH_FLAG] * 256 + buf[CBTCPacketProperties.IPHeaderLength + UDP_HEADER_LENGTH + GTP_LENGTH_FLAG + 1];
//byte[] ActualBuf = new byte[len - PacketProperties.IPHeaderLength - UDP_HEADER_LENGTH - GTP_MUST_CHOICE_LENGTH - gtpMessegePayloadLength];
//Array.Copy(buf, PacketProperties.IPHeaderLength + UDP_HEADER_LENGTH + GTP_MUST_CHOICE_LENGTH + gtpMessegePayloadLength, ActualBuf, 0, len - PacketProperties.IPHeaderLength - UDP_HEADER_LENGTH - GTP_MUST_CHOICE_LENGTH - gtpMessegePayloadLength);
byte[] ActualBuf = new byte[len - CBTCPacketProperties.IPHeaderLength - UDP_HEADER_LENGTH - 12];
Array.Copy(buf, CBTCPacketProperties.IPHeaderLength + UDP_HEADER_LENGTH + 12, ActualBuf, 0, len - CBTCPacketProperties.IPHeaderLength - UDP_HEADER_LENGTH - 12);
Unpack(ActualBuf, ActualBuf.Length);
}
else
{
DataFilterByIPAndPort(CBTCPacketProperties);
}
}
}
catch (Exception e)
{
}
}
}
//解析接收的数据包，形成PacketArrivedEventArgs事件数据类对象，并引发OnPacketArrival事件
unsafe private void Receive(byte[] buf, int len)
{
byte temp_protocol = 0;
uint temp_version = 0;
uint temp_sourceAddress = 0;
uint temp_destinationAddress = 0;
short temp_srcport = 0;
short temp_dstport = 0;
IPAddress temp_ip;
PacketArrivedEventArgs e = new PacketArrivedEventArgs();//新网络数据包信息事件
fixed(byte *fixed_buf = buf)
{
IPHeader *head = (IPHeader *)fixed_buf; //把数据流整和为IPHeader结构
e.HeaderLength = (uint)(head->versionAndLength & 0x0F) << 2;
e.IPHeaderBuffer = new byte[e.HeaderLength];
temp_protocol = head->protocol;
switch (temp_protocol) //提取协议类型
{
case 1: e.Protocol = "ICMP"; break;
case 2: e.Protocol = "IGMP"; break;
case 6: e.Protocol = "TCP"; break;
case 17: e.Protocol = "UDP"; break;
default: e.Protocol = "UNKNOWN"; break;
}
temp_version = (uint)(head->versionAndLength & 0xF0) >> 4;//提取IP协议版本
e.IPVersion = temp_version.ToString();
//以下语句提取出了PacketArrivedEventArgs对象中的其他参数
temp_sourceAddress = head->sourceAddress;
temp_destinationAddress = head->destinationAddress;
temp_ip = new IPAddress(temp_sourceAddress);
e.OriginationAddress = temp_ip.ToString();
temp_ip = new IPAddress(temp_destinationAddress);
e.DestinationAddress = temp_ip.ToString();
temp_srcport = *(short *)&fixed_buf[e.HeaderLength];
temp_dstport = *(short *)&fixed_buf[e.HeaderLength + 2];
e.OriginationPort = IPAddress.NetworkToHostOrder(temp_srcport).ToString();
e.DestinationPort = IPAddress.NetworkToHostOrder(temp_dstport).ToString();
e.PacketLength = (uint)len;
e.MessageLength = (uint)len - e.HeaderLength;
e.MessageBuffer = new byte[e.MessageLength];
e.ReceiveBuffer = buf;
//把buf中的IP头赋给PacketArrivedEventArgs中的IPHeaderBuffer
Array.Copy(buf, 0, e.IPHeaderBuffer, 0, (int)e.HeaderLength);
//把buf中的包中内容赋给PacketArrivedEventArgs中的MessageBuffer
Array.Copy(buf, (int)e.HeaderLength, e.MessageBuffer, 0, (int)e.MessageLength);
}
//引发PacketArrival事件
OnPacketArrival(e);
}
unsafe public List <PacapData> Parse()
{
List <PacapData> pacapDataList = new List <PacapData>();
while (this.Position != this.Length)
{
byte[] PktHeaderBuffer = new byte[sizeof(PacapPacketHeader)];
this.Read(PktHeaderBuffer, 0, sizeof(PacapPacketHeader));
fixed(byte *pktPtr = PktHeaderBuffer)
{
PacapPacketHeader *pktHeader = (PacapPacketHeader *)pktPtr;
byte[] data = new byte[pktHeader->Len];
int nReadCount = 0;
while (nReadCount < pktHeader->Len)
{
nReadCount += this.Read(data, 0, (int)(pktHeader->Len - nReadCount));
}
fixed(byte *enterPtr = data)
{
EthernetHeader *etherHeader = (EthernetHeader *)enterPtr;
byte * ipPtr = enterPtr + sizeof(EthernetHeader);
IPHeader * header = (IPHeader *)ipPtr;
int protocol = header->ProtocolType;
PacapData pData = null;
switch ((ProtocolType)header->ProtocolType)
{
case ProtocolType.TCP:
pData = new TcpData();
break;
case ProtocolType.UDP:
pData = new UdpData();
break;
}
if (pData != null)
{
int offset = sizeof(EthernetHeader) + pData.HeaderLen;
pData.IPHeader = *header;
pData.EthernetHeader = *etherHeader;
pData.PacketHeader = *pktHeader;
pData.Fill(data, offset, (int)(pktHeader->Len - offset));
pacapDataList.Add(pData);
}
}
}
}
return(pacapDataList);
}
unsafe private void Unpack(byte[] buf, int len)
{
byte protocol = 0;
uint version = 0;
uint ipSourceAddress = 0;
uint ipDestinationAddress = 0;
int sourcePort = 0;
int destinationPort = 0;
IPAddress ip;
Array.Copy(buf, PacketProperties.ReceiveBuf, len);
PacketProperties.BufLength = len;
fixed(byte *FixedBuf = buf)
{
IPHeader *head = (IPHeader *)FixedBuf;
PacketProperties.IPHeaderLength = (uint)((head->versionAndLength & 0x0f) << 2);
protocol = head->protocol;
version = (uint)((head->versionAndLength & 0xf0) >> 4);
if (protocol == 17 && version == 4)
{
ipSourceAddress = head->sourceAddress;
ipDestinationAddress = head->destinationAdress;
ip = new IPAddress(ipSourceAddress);
PacketProperties.OriginationAddress = ip.ToString();
ip = new IPAddress(ipDestinationAddress);
PacketProperties.DestinationAddress = ip.ToString();
sourcePort = buf[PacketProperties.IPHeaderLength] * 256 + buf[PacketProperties.IPHeaderLength + 1];
destinationPort = buf[PacketProperties.IPHeaderLength + 2] * 256 + buf[PacketProperties.IPHeaderLength + 3];
PacketProperties.OriginationPort = sourcePort.ToString();
PacketProperties.DestinationPort = destinationPort.ToString();
PacketProperties.PacketLength = Convert.ToUInt32(len);
if (PacketProperties.PacketLength > PacketProperties.IPHeaderLength + 40)
{
PacketProperties.MessageLength = PacketProperties.PacketLength - PacketProperties.IPHeaderLength;
Array.Copy(buf, (int)PacketProperties.IPHeaderLength, PacketProperties.MessageBuffer, 0, (int)PacketProperties.MessageLength);
DataFilterByIPAndPort(PacketProperties);
}
}
else if (protocol == 41 && version == 4)
{
ipSourceAddress = head->sourceAddress;
ipDestinationAddress = head->destinationAdress;
ip = new IPAddress(ipSourceAddress);
PacketProperties.OriginationAddress = ip.ToString();
ip = new IPAddress(ipDestinationAddress);
PacketProperties.DestinationAddress = ip.ToString();
sourcePort = buf[PacketProperties.IPHeaderLength + 40] * 256 + buf[PacketProperties.IPHeaderLength + 41];
destinationPort = buf[PacketProperties.IPHeaderLength + 42] * 256 + buf[PacketProperties.IPHeaderLength + 43];
PacketProperties.OriginationPort = sourcePort.ToString();
PacketProperties.DestinationPort = destinationPort.ToString();
PacketProperties.PacketLength = Convert.ToUInt32(len);
if (PacketProperties.PacketLength > PacketProperties.IPHeaderLength + 40)
{
PacketProperties.MessageLength = PacketProperties.PacketLength - PacketProperties.IPHeaderLength - 40;
Array.Copy(buf, (int)PacketProperties.IPHeaderLength + 40, PacketProperties.MessageBuffer, 0, (int)PacketProperties.MessageLength);
DataFilterByIPAndPort(PacketProperties);
}
}
}
}
//解析接收的数据包，形成PacketArrivedEventArgs时间数据类对象，并引发PacketArrival事件
unsafe private void Receive(byte[] buf, int len)
{
byte temp_protocol = 0;
uint temp_version = 0;
uint temp_ip_srcaddr = 0;
uint temp_ip_destaddr = 0;
short temp_srcport = 0;
short temp_dstport = 0;
IPAddress temp_ip;
//return;
PacketArrivedEventArgs e = new PacketArrivedEventArgs();
fixed(byte *fixed_buf = buf)
{
IPHeader *head = (IPHeader *)fixed_buf;
e.HeaderLength = (uint)(head->ip_verlen & 0x0F) << 2;
temp_protocol = head->ip_protocol;
switch (temp_protocol)
{
case 1: e.Protocol = "ICMP:"; break;
case 2: e.Protocol = "IGMP:"; break;
case 6: e.Protocol = "TCP:"; break;
case 17: e.Protocol = "UDP:"; break;
default: e.Protocol = "UNKNOWN"; break;
}
temp_version = (uint)(head->ip_verlen & 0xF0) >> 4;
e.IPVersion = temp_version.ToString();
temp_ip_srcaddr = head->ip_srcaddr;
temp_ip_destaddr = head->ip_destaddr;
temp_ip = new IPAddress(temp_ip_srcaddr);
e.OriginationAddress = temp_ip.ToString();
temp_ip = new IPAddress(temp_ip_destaddr);
e.DestinationAddress = temp_ip.ToString();
temp_srcport = *(short *)&fixed_buf[e.HeaderLength];
temp_dstport = *(short *)&fixed_buf[e.HeaderLength + 2];
e.OriginationPort = IPAddress.NetworkToHostOrder(temp_srcport).ToString();
e.DestinationPort = IPAddress.NetworkToHostOrder(temp_dstport).ToString();
// if(e.DestinationAddress!="211.87.212.116"||int.Parse(e.DestinationPort)>1000)
// {
// return;
// }
e.PacketLength = (uint)len;
e.MessageLength = (uint)len - e.HeaderLength;
e.ReceiveBuffer = buf;
//把buf中的IP头赋给PacketArrivedEventArgs中的IPHeaderBuffer
Array.Copy(buf, 0, e.IPHeaderBuffer, 0, (int)e.HeaderLength);
//把buf中的包中内容赋给PacketArrivedEventArgs中的MessageBuffer
Array.Copy(buf, (int)e.HeaderLength, e.MessageBuffer, 0, (int)e.MessageLength);
}
//引发PacketArrival事件
OnPacketArrival(e);
}
unsafe private void Receive(byte[] buf, int len)
{
byte temp_protocol = 0;
uint temp_version = 0;
uint temp_ip_srcaddr = 0;
uint temp_ip_destaddr = 0;
short temp_srcport = 0;
short temp_dstport = 0;
IPAddress temp_ip;
PacketArrivedEventArgs e = new PacketArrivedEventArgs();
fixed(byte *fixed_buf = buf)
{
IPHeader *head = (IPHeader *)fixed_buf;
e.HeaderLength = (uint)(head->ip_verlen & 0x0F) << 2;
//Extract Network Protocal Type
temp_protocol = head->ip_protocol;
switch (temp_protocol)
{
case 1: e.Protocol = "ICMP"; break;
case 2: e.Protocol = "IGMP"; break;
case 6: e.Protocol = "TCP"; break;
case 17: e.Protocol = "UDP"; break;
default: e.Protocol = "UNKNOWN"; break;
}
//Extract Network Protocal Version
temp_version = (uint)(head->ip_verlen & 0xF0) >> 4;
e.IPVersion = temp_version.ToString();
temp_ip_srcaddr = head->ip_srcaddr;
temp_ip_destaddr = head->ip_destaddr;
temp_ip = new IPAddress(temp_ip_srcaddr);
e.OriginationAddress = temp_ip.ToString();
temp_ip = new IPAddress(temp_ip_destaddr);
e.DestinationAddress = temp_ip.ToString();
temp_srcport = *(short *)&fixed_buf[e.HeaderLength];
temp_dstport = *(short *)&fixed_buf[e.HeaderLength + 2];
e.OriginationPort = IPAddress.NetworkToHostOrder(temp_srcport).ToString();
e.DestinationPort = IPAddress.NetworkToHostOrder(temp_dstport).ToString();
e.PacketLength = (uint)len;
e.MessageLength = (uint)len - e.HeaderLength;
e.ReceiveBuffer = buf;
Array.Copy(buf, 0, e.IPHeaderBuffer, 0, (int)e.HeaderLength);
Array.Copy(buf, (int)e.HeaderLength, e.MessageBuffer, 0, (int)e.MessageLength);
}
OnPacketArrival(e);
}
unsafe private void Receive(byte[] buf, int len)
{
byte protocol = 0;
uint version = 0;
uint ipSourceAddress = 0;
uint ipDestinationAddress = 0;
int sourcePort = 0;
int destinationPort = 0;
IPAddress ip;
PacketArrivedEventArgs e = new PacketArrivedEventArgs();
e.ReceiveBuf = buf;
e.BufLength = len;
fixed(byte *FixedBuf = buf)
{
IPHeader *head = (IPHeader *)FixedBuf;
e.IPHeaderLength = (uint)((head->versionAndLength & 0x0f) << 2);
//一个指向结构体或对象的指针访问其内成员（->指向结构体成员运算符)
//并将变量versionAndLength的值高四位清0，保留低四位
//
protocol = head->protocol;
switch (protocol)
{
case 1:
e.Protocol = "ICMP";
break;
case 2:
e.Protocol = "IGMP";
break;
case 6:
e.Protocol = "TCP";
break;
case 17:
e.Protocol = "UDP";
break;
case 132:
e.Protocol = "SCTP";
break;
default:
e.Protocol = "UNKNOWN";
break;
}
version = (uint)((head->versionAndLength & 0xf0) >> 4);
e.Version = version.ToString();
ipSourceAddress = head->sourceAddress;
ipDestinationAddress = head->destinationAdress;
ip = new IPAddress(ipSourceAddress);
e.OriginationAddress = ip.ToString();
ip = new IPAddress(ipDestinationAddress);
e.DestinationAddress = ip.ToString();
sourcePort = buf[e.IPHeaderLength] * 256 + buf[e.IPHeaderLength + 1];
destinationPort = buf[e.IPHeaderLength + 2] * 256 + buf[e.IPHeaderLength + 3];
e.OriginationPort = sourcePort.ToString();
e.DestinationPort = destinationPort.ToString();
e.PacketLength = (uint)len;
e.MessageLength = e.PacketLength - e.IPHeaderLength;
e.PacketBuffer = buf;
Array.Copy(buf, (int)e.IPHeaderLength, e.MessageBuffer, 0, (int)e.MessageLength);
OnPacketArrival(e);//引发PacketArrival事件
}
}
