Using the name resolver of resolv.h with IPv6

Question

I write or modify programs which perform name resolution and need a good control of the process. So I do not use getaddrinfo(), I go deeper and use res_qu

Answer 1

glibc:

res_setservers: no
__res_state._u._ext.nsaddrs
__res_state._u._ext.nsmap

set the latter to MAXNS+1 according to:

http://sourceware.org/ml/libc-hacker/2002-05/msg00035.html

BSD-libc:

res_setservers: yes
__res_state._u._ext.__res_state_ext

Seems messy to me and you'll probably need autoconf.