public static IGatewayMessage GetMessage(MessageReceivedEventArgs e)
{
GatewayPacketHeader header = GatewayPacketHeader.GetMessage(e); // 映射包的结构体
GatewayPacketBody body = GatewayPacketBody.GetMessage(ref header, e);
return(new GatewayPacketMessage(header, body, e.RemoteEP, e.LocalEP, e.LinqNo));
}
public static GatewayPacketBody GetMessage(ref GatewayPacketHeader header, MessageReceivedEventArgs args)
{
byte[] message = args.Buffer;
int offset = sizeof(GatewayPacketHeader); // 位于包头的偏移
if (offset > message.Length)
{
return(null);
}
GatewayPacketBody body = new GatewayPacketBody();
if (body.qclinkNo == null)
{
body.qclinkNo = new List <int>();
}
for (int i = 0; i < header.qdLinkCount; i++)
{
fixed(byte *ptrs = &args.Buffer[offset])
{
int linkno = *((int *)ptrs);
body.qclinkNo.Add(linkno);
offset += sizeof(int);
}
}
body.szBuffer = message; // 客户端发过来的数据（客户端数据+网关包头）
body.dwBufferOfs = offset; // 客户端数据开始索引
body.szBufferLen = message.Length - offset; // 客户端数据长度
return(body);
}
private GatewayPacketMessage(GatewayPacketHeader header, GatewayPacketBody body, EndPoint remote, EndPoint local, long linkNo)
{
pBody = body;
pRemoteEP = remote;
pLocalEP = local;
pHeader = header;
pLinkNo = linkNo;
}