Incorrect IP address with --sourceaddr gives not error message #316
Description
The documentation for --sourceaddr says
--sourceaddr STR Source IP address used to send queries.
Setting an IP address not correctly configured
on a local network interface causes cryptic
error messages.
It is expected that some error message comes out if the IP address is wrong (not configured on the interface), but when --sourceaddr is used in that way nothing comes out that gives a clue.
Compare a test with correct IP address with a one that is not on the interface (IPv6 disabled):
$ zonemaster-cli --test basic --level info zonemaster.net --no-ipv6 --sourceaddr 172.31.10.109 # Correct IP address
Seconds Level Message
======= ========= =======
0.00 INFO Using version v4.6.2 of the Zonemaster engine.
0.28 INFO Parent domain 'net' was found for the tested domain.
1.28 INFO Nameserver ns2.nic.fr/192.93.0.4 listed these servers as glue: ns2.nic.fr.,nsa.dnsnode.net.,nsp.dnsnode.net.,nsu.dnsnode.net..
1.28 INFO Nameserver nsa.dnsnode.net/194.58.192.46 listed these servers as glue: ns2.nic.fr.,nsa.dnsnode.net.,nsp.dnsnode.net.,nsu.dnsnode.net..
1.28 INFO Nameserver nsp.dnsnode.net/194.58.198.32 listed these servers as glue: ns2.nic.fr.,nsa.dnsnode.net.,nsp.dnsnode.net.,nsu.dnsnode.net..
1.29 INFO Nameserver nsu.dnsnode.net/185.42.137.98 listed these servers as glue: ns2.nic.fr.,nsa.dnsnode.net.,nsp.dnsnode.net.,nsu.dnsnode.net..
1.29 INFO Functional nameserver found. "A" query for www.zonemaster.net test skipped.
$ zonemaster-cli --test basic --level info zonemaster.net --no-ipv6 --sourceaddr 172.31.10.110 # Incorrect IP address
Seconds Level Message
======= ========= =======
0.00 INFO Using version v4.6.2 of the Zonemaster engine.
0.02 INFO Parent domain '.' was found for the tested domain.
0.04 CRITICAL No NS records for tested zone from parent. NS tests skipped.
Preferably something should come out that indicate the error.