[opendds-main] Network Interface for spdp traffic

[Erik A. <ea...@dr...>]

Hi,

playing a bit with OpenDDS on a Linux-PC with two network interfaces, I
tried to configure OpenDDS for rtps discovery on the second interface
(eth1). The default gateway is on eth0. The rtps config is attached.
So far it failed, sniffing with tcpdump I could still see the spdp
traffic on eth0, so the question is:

How do I move the spdp traffic to eth1?

Looking at Spdp::SpdpTransport::open_unicast_socket()
(dds/DCPS/RTPS/Spdp.cpp) it does seem to set only a port, not an address:
local_addr.set(uni_port)

Further when moving the default gateway to eth1, or just adding a route
for the multicast traffic with

route add 239.255.0.1 eth1

its working as intended and the subscribers receives the test message.

Is that the intended behavior? Anything I have missed?

greetings,
Erik