Re: [PATCH] New ORB_init option "ORBNetID=<string>"

[Tor Lillqvist <tml novell com>]

I think this patch broke test-linc on multihomed hosts. I have tested
only on Win32, but assume the same can happen on Unix. The scenario,
as I see it, is as follows:

- get_netid() looks up the interfaces of the machine, and chooses the
address if the first non-loopback one it finds. 

- link_server_setup() creates a socket and binds it to this address.

- link_server_setup() calls link_protocol_get_sockinfo() which calls
link_protocol_get_sockinfo_ipv4(), which calls gethostbyaddr() on the
address get_netid() returned. This returns a name for the machine.

- create_client() then tries to connect to the server using the name
looked up by link_protocol_get_sockinfo_ipv4(). Eventually
link_protocol_get_sockaddr_ipv4() is called and it looks up this
name. This however returns *another* one of the machine's
addresses. Thus the connection fails.

I.e. the problem is that the IP address get_netid() returns is not
necessarily the one that looking up the address corresponding to the
machine's name will return.

The use of hostnames and/or IP addresses in linc2 seems quite mixed up
and confusing. Couldn't we just stop using hostnames completely in
ORBit2, and use only IP (v4 or v6) addresses in IORs etc?

--tml