Invalid pasta port specifier?

[io7m]

To quote the pasta(1) manual:

[-t, --tcp-ports spec]
    Configure TCP port forwarding to namespace. spec can be one of:
...
    -t 192.0.2.1/22
      Forward local port 22, bound to 192.0.2.1, to port 22 in the target namespace

And then, lower down:

[-T, --tcp-ns spec]
    Configure TCP port forwarding from target namespace to init namespace. spec is as described above for TCP.

So this, as far as I can tell, should be valid:

$ podman run --network=pasta:--tcp-ns,10.10.0.4/5432 --publish 10.10.0.4:5432:5432/tcp docker.io/bitnami/pgbouncer:latest
Error: pasta failed with exit code 1:
Invalid port specifier 10.10.0.4/5432

$ podman --version
podman version 5.2.2

Is this a bug? I thought I'd check before opening a ticket.

[sbrivio-rh]

Is this a bug?

Oops, yes, it's a documentation bug I indirectly introduced in https://passt.top/passt/commit/?id=3c6ae625101aee6ddf94e0fd85ce3a9c9067c3bf.

spec for -T (and -U) is not (after that commit) as described for -t (and -u), because you can't bind to a particular address inside the namespace. These options are used for "spliced" forwarding over the loopback interface, so specifying an address there won't work.

I thought I'd check before opening a ticket.

It's probably even quicker if you submit a patch ([email protected], no need to subscribe, the usual git format-email format) for the man page.