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Handle DNS timeouts in old-style lookkup code.

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This commit is contained in:
Ulrich Drepper 2010-04-05 12:21:20 -07:00
parent 4bc2bcba67
commit 4535680d03
2 changed files with 16 additions and 6 deletions
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4
ChangeLog
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@ -1,5 +1,9 @@
2010-04-05 Ulrich Drepper <drepper@redhat.com>
[BZ #11010]
* resolv/nss_dns/dns-host.c (_nss_dns_gethostbyname3_r): Handle
timeouts from servers.
[BZ #11149]
* elf/ldconfig.c (main): Respect chroot setting when looking for
the aux cache.

18
resolv/nss_dns/dns-host.c
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@ -1,4 +1,4 @@
/* Copyright (C) 1996-2004, 2007, 2008, 2009 Free Software Foundation, Inc.
/* Copyright (C) 1996-2004, 2007-2009, 2010 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Extended from original form by Ulrich Drepper <drepper@cygnus.com>, 1996.
@ -198,21 +198,27 @@ _nss_dns_gethostbyname3_r (const char *name, int af, struct hostent *result,
1024, &host_buffer.ptr, NULL, NULL, NULL);
if (n < 0)
{
if (errno == ESRCH)
switch (errno)
{
case ESRCH:
status = NSS_STATUS_TRYAGAIN;
h_errno = TRY_AGAIN;
break;
case ECONNREFUSED:
case ETIMEDOUT:
status = NSS_STATUS_UNAVAIL;
break;
default:
status = NSS_STATUS_NOTFOUND;
break;
}
else
status = (errno == ECONNREFUSED
? NSS_STATUS_UNAVAIL : NSS_STATUS_NOTFOUND);
*h_errnop = h_errno;
if (h_errno == TRY_AGAIN)
*errnop = EAGAIN;
else
__set_errno (olderr);
/* If we are looking for a IPv6 address and mapping is enabled
/* If we are looking for an IPv6 address and mapping is enabled
by having the RES_USE_INET6 bit in _res.options set, we try
another lookup. */
if (af == AF_INET6 && (_res.options & RES_USE_INET6))