private static RouteMonitoringModel ConvertToModel(RouteMonitoring msg)
{
var bgpMsg = msg.BgpUpdate;
if (bgpMsg.Attributes.Count > 4)
{
}
var peerHeaderModel = ConvertToModel(msg.PeerHeader);
var asPath = bgpMsg.Attributes.FirstOrDefault(x => x.AttributeType == PathAttributeType.AsPath) as PathAttributeASPath;
var model = new RouteMonitoringModel
{
DateTime = msg.PeerHeader.DateTime,
Peer = peerHeaderModel,
Origin = (PathAttributeOrigin)bgpMsg.Attributes.FirstOrDefault(x => x.AttributeType == PathAttributeType.Origin),
AsPath = asPath?.ASPaths[0].ASNs,
};
var communities = bgpMsg.Attributes.Where(x => x.AttributeType == PathAttributeType.Community).ToList();
foreach (var community in communities)
{
model.Communities.Add(community.ToString());
}
if (bgpMsg.Nlri.Count > 0)
{
var nexthop = bgpMsg.Attributes.FirstOrDefault(x => x.AttributeType == PathAttributeType.NextHop) as PathAttributeNextHop;
var announce = ConvertToModel(AddressFamily.IP, SubsequentAddressFamily.Unicast, nexthop?.NextHop, bgpMsg.Nlri);
model.Announce.Add(announce);
}
if (bgpMsg.WithdrawnRoutesLength > 0)
{
var withdraw = ConvertToModel(AddressFamily.IP, SubsequentAddressFamily.Unicast, bgpMsg.WithdrawnRoutes);
model.Withdraw.Add(withdraw);
}
var mpReach = bgpMsg.Attributes.FirstOrDefault(x => x.AttributeType == PathAttributeType.MpReachNlri) as PathAttributeMPReachNlri;
if (mpReach?.Nlri.Count > 0)
{
var announce = ConvertToModel(mpReach.Afi, mpReach.Safi, mpReach.NextHop, mpReach.Nlri);
model.Announce.Add(announce);
}
var mpUnreach = bgpMsg.Attributes.FirstOrDefault(x => x.AttributeType == PathAttributeType.MpUnreachNlri) as PathAttributeMPUnreachNlri;
if (mpUnreach?.WithdrawnRoutes.Count > 0)
{
var withdraw = ConvertToModel(mpUnreach.Afi, mpUnreach.Safi, mpUnreach.WithdrawnRoutes);
model.Withdraw.Add(withdraw);
}
return(model);
}
public static BmpMessage Create(byte[] data)
{
var commonHeaderLength = 6;
var perPeerHeaderLength = 42;
var msgHeader = new BmpHeader(data);
BmpMessage msg;
switch (msgHeader.MessageType)
{
case BmpMessageType.Initiation:
msg = new BmpInitiation();
break;
case BmpMessageType.RouteMonitoring:
msg = new RouteMonitoring();
break;
case BmpMessageType.StatisticsReport:
msg = new StatisticsReport();
break;
case BmpMessageType.PeerDown:
msg = new PeerDownNotification();
break;
case BmpMessageType.PeerUp:
msg = new PeerUpNotification();
break;
case BmpMessageType.Termination:
msg = new BmpTermination();
break;
default:
return(null);
}
msg.BmpHeader = msgHeader;
var offset = commonHeaderLength;
if (msgHeader.MessageType != BmpMessageType.Initiation)
{
msg.PeerHeader = new PerPeerHeader(data, offset);
offset += perPeerHeaderLength;
}
msg.Decode(data, offset);
return(msg);
}
