public override void Decode(byte[] data, int offset)
{
if ((PeerHeader.Flags & (1 << 7)) != 0)
{
var ipBytes = new byte[16];
Array.Copy(data, offset, ipBytes, 0, 4);
LocalAddress = new IPAddress(ipBytes);
}
else
{
var ipBytes = new byte[4];
Array.Copy(data, offset + 12, ipBytes, 0, 4);
LocalAddress = new IPAddress(ipBytes);
}
offset += 16;
LocalPort = EndianBitConverter.Big.ToUInt16(data, offset);
offset += 2;
RemotePort = EndianBitConverter.Big.ToUInt16(data, offset);
offset += 2;
SentOpenMessage = BgpMessage.Create(data, offset) as BgpOpenMessage;
offset += SentOpenMessage?.Header.Length ?? 0;
ReceivedOpenMessage = BgpMessage.Create(data, offset) as BgpOpenMessage;
}
public void BgpOpenDecodes(string value)
{
var data = Convert.FromBase64String(value);
var msg = new BgpOpenMessage();
msg.Decode(data, 0);
Assert.Equal(msg.MyAS, 23456);
Assert.Equal(msg.Version, 4);
Assert.Equal(msg.HoldTime, 90);
}
public static BgpMessage Create(byte[] data, int offset)
{
var bgpHeaderLength = 19;
var msgHeader = new BgpHeader(data, offset);
BgpMessage msg;
switch (msgHeader.Type)
{
case BgpMessageType.Open:
msg = new BgpOpenMessage();
break;
case BgpMessageType.Update:
msg = new BgpUpdateMessage();
break;
case BgpMessageType.Notification:
msg = new BgpNotificationMessage();
break;
case BgpMessageType.Keepalive:
msg = new BgpKeepAliveMessage();
break;
case BgpMessageType.RouteRefresh:
msg = new BgpRouteRefreshMessage();
break;
default:
return(null);
}
msg.Header = msgHeader;
offset += bgpHeaderLength;
msg.Decode(data, offset);
return(msg);
}