Re: [PATCH v4 2/4] util/qemu-sockets.c: Split host:port parsing out of inet_parse

[Samuel Thibault]

Doug Evans, le ven. 05 mars 2021 16:05:05 -0800, a ecrit:
> Given that the code is not supposed to be able to know brackets were present
> (they're stripped off early on), what does the above mean w.r.t. the guest?
> For the host we can have "" mean listen on both IPv4 and IPv6
> (by default, absent extra options like ipv4=off).
> But what does a guest address of "" mean?
> IPv4? IPv6? Both?

It cannot really be "both" since it'd need to know.

The 0.0.0.0 address used to mean the dhcp-provided address, and we don't
have a way to know the ipv6 address used with the stateless selection,
so I would say that empty address would be just the dhcp-provided
address. Most probably the guest will pick it up anyway, and guests
usually listen the same on ipv4 and ipv6, so I'd say empty most probably
means the user wants to just connect to ipv4 (whatever protocol was used
to connect to the host).

Samuel