This is the mail archive of the libc-hacker@sourceware.cygnus.com mailing list for the glibc project.

Note that libc-hacker is a closed list. You may look at the archives of this list, but subscription and posting are not open.

Index Nav:	[Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav:	[Date Prev] [Date Next]	[Thread Prev] [Thread Next]

nscd and IPv6

To: libc-hacker at sourceware dot cygnus dot com
Subject: nscd and IPv6
From: Philip Blundell <Philip dot Blundell at pobox dot com>
Date: Tue, 11 Jan 2000 19:02:22 +0000

I think this code in nscd/hstcache.c is bogus:

      /* And the generated IPv6 addresses if necessary.  */
      if (hst->h_length == INADDRSZ)
	{
	  /* Generate the IPv6 addresses.  */
	  for (cnt = 0; cnt < h_addr_list_cnt; cp += IN6ADDRSZ, ++cnt)
	    map_v4v6_address (hst->h_addr_list[cnt], cp);
	}

IMHO, the NSS code should not be automatically mapping IPv4 addresses to IPv6,
and it should certainly not be happening in nscd.  If a program wants both 
IPv4 and IPv6 addresses it should pass PF_UNSPEC to getaddrinfo().

The current nscd behaviour is confusing to users (judging by the current 
thread on libc-alpha and recent discussion elsewhere) and unhelpful on 
IPv6-only hosts where a v4-mapped address is no use.

Does anybody object to deleting this code?

Thanks

p.

Follow-Ups:
- Re: nscd and IPv6
  - From: Thorsten Kukuk

Index Nav:	[Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav:	[Date Prev] [Date Next]	[Thread Prev] [Thread Next]