private void device_OnPacketArrival(object sender, CaptureEventArgs e)
{
var time = e.Packet.Timeval.Date;
var len = e.Packet.Data.Length;
var pack = PacketDotNet.Packet.ParsePacket(e.Packet.LinkLayerType, e.Packet.Data);
if (pack is PacketDotNet.EthernetPacket)
{
PacketDotNet.EthernetPacket ethPack = pack as PacketDotNet.EthernetPacket;
if (ethPack.PayloadPacket is PacketDotNet.IPv4Packet)
{
PacketDotNet.IPv4Packet ipPack = ethPack.PayloadPacket as PacketDotNet.IPv4Packet;
//TCP
if (ipPack.PayloadPacket is PacketDotNet.TcpPacket)
{
PacketDotNet.TcpPacket tcpPack = ipPack.PayloadPacket as PacketDotNet.TcpPacket;
if ((ipPack.DestinationAddress.ToString().Equals("172.25.25.50") && tcpPack.DestinationPort == 8001) ||
(ipPack.SourceAddress.ToString().Equals("172.25.25.50") && tcpPack.SourcePort == 8001))
{
//Console.WriteLine("TCP:{0}:{1}-{2}:{3}",ipPack.SourceAddress, tcpPack.SourcePort,ipPack.DestinationAddress,tcpPack.DestinationPort);
if (tcpPack.PayloadData != null && tcpPack.PayloadData.Length > 0)
{
Console.WriteLine("读取数据:{0}", System.Text.Encoding.UTF8.GetString(tcpPack.PayloadData));
}
}
}
//UDP
else if (ipPack.PayloadPacket is PacketDotNet.UdpPacket)
{
PacketDotNet.UdpPacket udp = ipPack.PayloadPacket as PacketDotNet.UdpPacket;
if (ipPack.DestinationAddress.ToString().Equals("172.25.25.69") && udp.DestinationPort == 5060)
{
if (udp.PayloadData != null && udp.PayloadData.Length > 0)
{
Console.WriteLine("读取数据:{0}", System.Text.Encoding.UTF8.GetString(udp.PayloadData));
}
}
//if (ipPack.DestinationAddress.ToString().Equals("172.25.25.69") && udp.DestinationPort == 18038)
if (ipPack.DestinationAddress.ToString().Equals("172.25.25.66") && udp.DestinationPort == 18132)
{
if (udp.PayloadData != null && udp.PayloadData.Length > 100)
{
RtpPacket rtpPacket = new RtpPacket(udp.PayloadData);
RtpHeader rtpHeader = new RtpHeader(udp.PayloadData);
int packetRate = RTPPayloadTypes.GetSamplingFrequency((RTPPayloadTypesEnum)Enum.ToObject(typeof(RTPPayloadTypesEnum), rtpHeader.PayloadType)); //8000
int minSec = ((int)rtpHeader.Timestamp - _preTimestamp - _prePacketLength) / (packetRate / 1000);
_preTimestamp = (int)rtpHeader.Timestamp;
_prePacketLength = rtpPacket.Payload.Length;
//写文件
string fileName = "F:\\" + "testRtp9" + ".wav";
PCMU m_PCMU = new PCMU();
//语音包
using (System.IO.FileStream fs = new System.IO.FileStream(fileName,
System.IO.FileMode.OpenOrCreate, System.IO.FileAccess.Write, System.IO.FileShare.None))
{
byte[] temp = null; //空白语音
byte[] dec = null; //payload荷载数据
byte[] data = null; //完整数据
//空白
if (minSec > 0)
{
//temp = new byte[16 * minSec];
//dec = m_PCMU.Decode_pcm8(rtpPacket.Payload, 0, rtpPacket.Payload.Length);
//data = new byte[temp.Length + dec.Length];
//Array.Copy(temp, 0, data, 0, temp.Length);
//Array.Copy(dec, 0, data, temp.Length, dec.Length);
temp = new byte[8 * minSec];
for (int i = 0; i < temp.Length; i++)
{
temp[i] = 0xFE;
}
dec = rtpPacket.Payload;
data = new byte[temp.Length + dec.Length];
Array.Copy(temp, 0, data, 0, temp.Length);
Array.Copy(dec, 0, data, temp.Length, dec.Length);
data = m_PCMU.Decode_ulaw_pcm8(data, 0, data.Length);
}
else
{
data = m_PCMU.Decode_ulaw_pcm8(rtpPacket.Payload, 0, rtpPacket.Payload.Length);
}
fs.Position = fs.Length;
fs.Write(data, 0, data.Length);
}
}
}
}
}
}
}
public RtpPacket(byte[] packet)
{
Header = new RtpHeader(packet);
Payload = new byte[packet.Length - Header.Length];
Array.Copy(packet, Header.Length, Payload, 0, Payload.Length);
}