/// <summary>
/// 根据IP寻找对应Mac
/// </summary>
/// <param name="ip"></param>
/// <returns></returns>
public static MacIp FindArpByIP(string ip)
{
try
{
MacIp arp = null;
lock (list)
{
foreach (MacIp mi in list)
{
arp = mi;
break;
}
}
if (arp == null)
{
string mac = NetUtils.GetMacAddress(ip);
arp = new MacIp(mac, ip);
list.Add(arp);
return(arp);
}
return(arp);
}
catch (Exception e)
{
throw e;
}
}
/// <summary>
/// 生成链路层数据包
/// </summary>
/// <param name="srcIp"></param>
/// <param name="dstIp"></param>
/// <param name="type"></param>
public static byte[] GeneratLinkData(string srcIp, string dstIp, PacketType type, byte[] data)
{
try
{
MacIp dstMacIp = MyArp.FindArpByIP(dstIp);
MacIp srcMacIp = MyArp.FindArpByIP(srcIp);
byte[] packet = new byte[data.Length + 14];
Array.Copy(Encoding.ASCII.GetBytes(srcMacIp.MAC), 0, packet, 0, 6);
Array.Copy(Encoding.ASCII.GetBytes(dstMacIp.MAC), 0, packet, 6, 6);
Array.Copy(BitConverter.GetBytes(Convert.ToInt32(type)), 0, packet, 12, 2);
Array.Copy(data, 0, packet, 14, data.Length);
return(packet);
}
catch (Exception e)
{
throw e;
}
}
