veyron2/ipc: add RoamingListen support.
This CL adds support for 'roaming' whereby a server may dynamically
change its IP address in response to network changes. It adds a new
API method, RoamingListen, that listens on a config.Publisher channel
for a prescribed set of messages that encode the initial and changing
be changed with an option to NewServer and this usage is only expected
to be required for unit tests and other special cases.
The 'roaming' profile, veyron/profiles/roaming is required to enable
this support. This also brings in support for GCE's 1:1 NAT configuration.
This CL is preliminary and not fully tested, in particular more
unit tests are required for the core RoamingListen call and for
remove servers from the config.Publisher stream.
Change-Id: Ic09bfe0edc6391702e42468e88ae5f4d56bc3f4a
22 files changed
