Taylor R Campbell
f051c36471
Pass NI_NUMERICSERV|NI_NUMERICSCOPE if NI_NUMERICHOST to getnameinfo.
...
This addresses part of https://github.com/heimdal/heimdal/issues/1214
to audit potential network leaks with [libdefaults] block_dns = yes.
NI_NUMERICHOST is _probably_ sufficient -- we probably won't see many
systems using NIS to look up service names by number if we fail to
specify NI_NUMERICSERV, and such systems probably require careful
auditing of their own. And I don't know of any way NI_NUMERICSCOPE
could trigger network leaks. But named scope ids are such a niche
option with IPv6 that setting it to forestall concerns can't hurt
much, and it makes reviewing easier if we just unconditionally flip
on all the numeric-only options.
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