[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Old Index]
Re: getaddrinfo(3) on numerical addresses
> I suspect there's some misunderstanding.
Yes. It's about numerical IPv4 addresses being looked up with an AF_INET6 hint.
check_ping tries to figure out whether it needs to call ping6 (suppose
wer'e on a system where ping6 is different from ping).
Suppose that check_ping is invoked without -4/-6 and with -H 188.8.131.52.
Now check_ping tries to figure out whether the -H argument is a/resolves to
a IPv6 address. To do so, it checks whether getaddrinfo() on the -H argument
(which is 184.108.40.206) with an AF_INET6 hint succeeds. But this triggers a DNS
Given this is a monitoring system, who's job it is to detect server failures,
marking random servers/switches as dead while the resolver is going mad and
so check_ping on their numerical IPv4 times out is not particularily useful.
I guess the point is what you expect getaddrinfo on 220.127.116.11 with a AF_INET6
hint to do. Well, you could have a search domain of numerical.org and
18.104.22.168.numerical.org have an AAAA record. How likely is that?
Main Index |
Thread Index |