_test_skopeo_credential_sharing() used port_is_free() to check if a
port has no active listeners. With the new implementation, this is
not equivalent anymore: a port might be in TIME_WAIT, so it's not
free, but the listener might be long gone.
Add tcp_port_probe() to check if there's an active listener on a
given port, and use it in _test_skopeo_credential_sharing().
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
These tests should cover all the basic networking functionality with
pasta(1). Namely, they check:
- IPv4 and IPv6 addressing and routing settings
- TCP and UDP port forwarding over IPv4 and IPv6
- data transfers and ICMP/ICMPv6 echo requests
- the (exceedingly simple) lifecycle handling
These tests need some new helpers, to obtain IPv4 and IPv4 addresses
and routes, as well as MTU and interface names. Those use jq(1) for
parsing.
Some availability checks are implemented as well, to skip tests if
pasta(1) is not available, or if IPv4 and IPv6 are not usable.
To get consistent outcomes across distributions, and to enable
uncomplicated termination for UDP tests based on zero-sized packets,
use socat(1), which, unlike netcat, doesn't suffer from option
inconsistencies depending on flavours (traditional, BSD, NMAP) and
versions.
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
The main helpers.bash file is rather bloated and it's difficult to
find stuff there. Move networking functions to their own helper
file.
While at it, apply a consistent style, and rearrange logically
related functions into sections.
Suggested-by: Ed Santiago <santiago@redhat.com>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Stefano Brivio