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Define and implement RES_USE_DNSSEC option in resolver.

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Adam Tkac 2009-07-27 07:33:48 -07:00 committed by Ulrich Drepper
parent 09cd1f5754
commit 2d0671cbbd
5 changed files with 26 additions and 5 deletions
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10
ChangeLog
View File

@ -1,3 +1,13 @@
2009-07-27 Ulrich Drepper <drepper@redhat.com>
* resolv/resolv.h (RES_USE_DNSSEC): Define.
* resolv/res_debug.c (p_option): Handle RES_USE_EDNS0 and
RES_USE_DNSSEC.
* resolv/res_mkquery.c (__res_nopt): Set flags for RES_USE_DNSSEC.
* resolv/res_query.c (__libc_res_nquery): Handle RES_USE_DNSSEC in
all the places we handled RES_USE_EDNS0 only before.
Patch by Adam Tkac <atkac@redhat.com>.
2009-07-27 Jakub Jelinek <jakub@redhat.com>
* elf/dl-lookup.c (do_lookup_x): Fix check for table more than

2
resolv/res_debug.c
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@ -586,6 +586,8 @@ p_option(u_long option) {
case RES_ROTATE: return "rotate";
case RES_NOCHECKNAME: return "no-check-names";
case RES_USEBSTRING: return "ip6-bytstring";
case RES_USE_EDNS0: return "edns0";
case RES_USE_DNSSEC: return "dnssec";
/* XXX nonreentrant */
default: sprintf(nbuf, "?0x%lx?", (u_long)option);
return (nbuf);

10
resolv/res_mkquery.c
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@ -247,7 +247,15 @@ __res_nopt(res_state statp,
NS_PUT16(MIN(anslen, 0xffff), cp); /* CLASS = UDP payload size */
*cp++ = NOERROR; /* extended RCODE */
*cp++ = 0; /* EDNS version */
/* XXX Once we support DNSSEC we change the flag value here. */
if (statp->options & RES_USE_DNSSEC) {
#ifdef DEBUG
if (statp->options & RES_DEBUG)
printf(";; res_opt()... ENDS0 DNSSEC\n");
#endif
flags |= NS_OPT_DNSSEC_OK;
}
NS_PUT16(flags, cp);
NS_PUT16(0, cp); /* RDLEN */
hp->arcount = htons(ntohs(hp->arcount) + 1);

8
resolv/res_query.c
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@ -147,7 +147,7 @@ __libc_res_nquery(res_state statp,
if (n > 0)
{
if ((oflags & RES_F_EDNS0ERR) == 0
&& (statp->options & RES_USE_EDNS0) != 0)
&& (statp->options & (RES_USE_EDNS0|RES_USE_DNSSEC)) != 0)
{
n = __res_nopt(statp, n, query1, bufsize, anslen / 2);
if (n < 0)
@ -169,7 +169,7 @@ __libc_res_nquery(res_state statp,
NULL, query2, bufsize - nused);
if (n > 0
&& (oflags & RES_F_EDNS0ERR) == 0
&& (statp->options & RES_USE_EDNS0) != 0)
&& (statp->options & (RES_USE_EDNS0|RES_USE_DNSSEC)) != 0)
n = __res_nopt(statp, n, query2, bufsize - nused - n,
anslen / 2);
nquery2 = n;
@ -184,7 +184,7 @@ __libc_res_nquery(res_state statp,
if (n > 0
&& (oflags & RES_F_EDNS0ERR) == 0
&& (statp->options & RES_USE_EDNS0) != 0)
&& (statp->options & (RES_USE_EDNS0|RES_USE_DNSSEC)) != 0)
n = __res_nopt(statp, n, query1, bufsize, anslen);
nquery1 = n;
@ -203,7 +203,7 @@ __libc_res_nquery(res_state statp,
}
if (__builtin_expect (n <= 0, 0)) {
/* If the query choked with EDNS0, retry without EDNS0. */
if ((statp->options & RES_USE_EDNS0) != 0
if ((statp->options & (RES_USE_EDNS0|RES_USE_DNSSEC)) != 0
&& ((oflags ^ statp->_flags) & RES_F_EDNS0ERR) != 0) {
statp->_flags |= RES_F_EDNS0ERR;
#ifdef DEBUG

1
resolv/resolv.h
View File

@ -218,6 +218,7 @@ struct res_sym {
#define RES_SNGLKUP 0x00200000 /* one outstanding request at a time */
#define RES_SNGLKUPREOP 0x00400000 /* -"-, but open new socket for each
request */
#define RES_USE_DNSSEC 0x00800000 /* use DNSSEC using OK bit in OPT */
#define RES_DEFAULT (RES_RECURSE|RES_DEFNAMES|RES_DNSRCH|RES_NOIP6DOTINT)