[Xorp-users] Sending update packets

[Nathan K]

I'm attempting to build and send an update packet to xorp peer using the 
UpdatePacket class and the Peer::send_update_message method. When I send 
update packets with nlri information and various path attributes, there are 
no problems. However, when I send an update packet with a single withdrawn 
route, it doesn't seem to get sent out.

The packet is built like so:

UpdatePacket packet;
IPv4 ip(<ip in network-byte-order>);
IPv4Net ipnet(ip, prefLength);
BGPUpdateAttrib attrib(ipnet);
packet.add_withdrawn(attrib);

And sent like this:
send_update_message(packet);

My problem is typically send_message_complete usually gets called with a 
DATA event, but in the above case, I only get a FLUSH event and tcpdump 
reveals that no data was sent out. Dumping the string representation of the 
packet before it is sent gives this:

Update Packet
- Withdrawn 10.1.1.1/32

Which should be fine.

Any ideas what I'm doing wrong here? Thanks.

-Nathan.

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