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1999-10-01  Ulrich Drepper  <drepper@cygnus.com>

	* resolv/nss_dns/dns-host.c (_nss_dns_gethostbyaddr_r): Align
	handling of IPv6 tunnel address handling with bind 8.2.1.  Allow
	len argument to be greater than needed address size.
This commit is contained in:
Ulrich Drepper 1999-10-01 21:42:39 +00:00
parent a7123f0edf
commit 20cc4c87c0
2 changed files with 12 additions and 4 deletions
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6
ChangeLog
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@ -1,3 +1,9 @@
1999-10-01 Ulrich Drepper <drepper@cygnus.com>
* resolv/nss_dns/dns-host.c (_nss_dns_gethostbyaddr_r): Align
handling of IPv6 tunnel address handling with bind 8.2.1. Allow
len argument to be greater than needed address size.
1999-10-01 Andreas Jaeger <aj@suse.de>
* locale/programs/ld-collate.c (insert_value): Add cast to avoid

10
resolv/nss_dns/dns-host.c
View File

@ -197,6 +197,7 @@ _nss_dns_gethostbyaddr_r (const char *addr, size_t len, int af,
{
static const u_char mapped[] = { 0,0, 0,0, 0,0, 0,0, 0,0, 0xff,0xff };
static const u_char tunnelled[] = { 0,0, 0,0, 0,0, 0,0, 0,0, 0,0 };
static const u_char v6local[] = { 0,0, 0,1 };
const u_char *uaddr = (const u_char *)addr;
struct host_data
{
@ -210,9 +211,10 @@ _nss_dns_gethostbyaddr_r (const char *addr, size_t len, int af,
size_t size;
int n, status;
if (af == AF_INET6 && len == IN6ADDRSZ &&
(memcmp (uaddr, mapped, sizeof mapped) == 0
|| memcmp (uaddr, tunnelled, sizeof tunnelled) == 0))
if (af == AF_INET6 && len == IN6ADDRSZ
&& (memcmp (uaddr, mapped, sizeof mapped) == 0
|| (memcmp (uaddr, tunnelled, sizeof tunnelled) == 0
&& memcmp (&uaddr[sizeof tunnelled], v6local, sizeof v6local))))
{
/* Unmap. */
addr += sizeof mapped;
@ -234,7 +236,7 @@ _nss_dns_gethostbyaddr_r (const char *addr, size_t len, int af,
*h_errnop = NETDB_INTERNAL;
return NSS_STATUS_UNAVAIL;
}
if (size != len)
if (size > len)
{
*errnop = EAFNOSUPPORT;
*h_errnop = NETDB_INTERNAL;