test: Fix spurious test failure with systemd-resolved

systemd-resolved has the rather strange behaviour of listening on the
non-standard loopback address 127.0.0.53.  Various changes we've made in
passt mean that we now usually work fine on a host using systemd-resolved.
However our tests still fail in this case.  We have a special case for when
the guest's resolv.conf needs to differ from the host's because the
resolver is on a host loopback address.  However, we only consider the case
where the host resolver is on 127.0.0.1, not other loopback addresses.

Correct this with a different test condition.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
This commit is contained in:
David Gibson 2024-07-25 16:50:42 +10:00 committed by Stefano Brivio
parent becf81ab88
commit e9a542321f

View file

@ -38,7 +38,7 @@ check [ __MTU__ = 65520 ]
test DHCP: DNS test DHCP: DNS
gout DNS sed -n 's/^nameserver \([0-9]*\.\)\(.*\)/\1\2/p' /etc/resolv.conf | tr '\n' ',' | sed 's/,$//;s/$/\n/' gout DNS sed -n 's/^nameserver \([0-9]*\.\)\(.*\)/\1\2/p' /etc/resolv.conf | tr '\n' ',' | sed 's/,$//;s/$/\n/'
hout HOST_DNS sed -n 's/^nameserver \([0-9]*\.\)\(.*\)/\1\2/p' /etc/resolv.conf | head -n3 | tr '\n' ',' | sed 's/,$//;s/$/\n/' hout HOST_DNS sed -n 's/^nameserver \([0-9]*\.\)\(.*\)/\1\2/p' /etc/resolv.conf | head -n3 | tr '\n' ',' | sed 's/,$//;s/$/\n/'
check [ "__DNS__" = "__HOST_DNS__" ] || [ "__DNS__" = "__HOST_GW__" -a "__HOST_DNS__" = "127.0.0.1" ] check [ "__DNS__" = "__HOST_DNS__" ] || ( [ "__DNS__" = "__HOST_GW__" ] && expr "__HOST_DNS__" : "127[.]" )
# FQDNs should be terminated by dots, but the guest DHCP client might omit them: # FQDNs should be terminated by dots, but the guest DHCP client might omit them:
# strip them first # strip them first