libc/resolv/nss_dns dns-host.c

[drepper at sourceware dot cygnus dot com]

CVSROOT:	/cvs/glibc
Module name:	libc
Changes by:	drepper@sourceware.cygnus.com	00/05/27 01:16:24

Modified files:
	resolv/nss_dns : dns-host.c 

Log message:
	(_nss_dns_gethostbyname2_r): If lookup
	of IPv6 address failed and RES_USE_INET6 bit in _res.options is set,
	perform lookup for T_A type and tell getanswer_r to convert the
	result with new argument.
	(_nss_dns_gethostbyaddr_r): Pass zero as new argument to getanswer_r.
	Don't convert addresses from IPv4 to IPv6 here.
	(getanswer_r): Take new parameter indicating if mapping from IPv4 to
	IPv6 is wanted.  Allow qtype and type from reply to disagree if
	IPv4 mapping has to be done.  Perform mappings if required by the
	caller and not if RES_USE_INET6 bit in _res.options is set.
	Add several __builtin_expect.