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In _gethostbydnsaddr(), force RES_RECURSE into _res.options. This is

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incredibly obnoxious, but also makes inverse mappings work when the local
resolver is in a cache-only configuration.  (Maybe this is actually
a bug in BIND?)
This commit is contained in:
wollman 1994-12-01 22:25:38 +00:00
parent 5151cf56b6
commit 48f193add4
1 changed files with 4 additions and 1 deletions
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5
lib/libc/net/gethostbydns.c
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@ -53,7 +53,7 @@
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)gethostnamadr.c 8.1 (Berkeley) 6/4/93";
static char rcsid[] = "$Id: gethostbydns.c,v 1.1 1994/09/25 02:12:05 pst Exp $";
static char rcsid[] = "$Id: gethostbydns.c,v 1.2 1994/09/25 17:45:37 pst Exp $";
#endif /* LIBC_SCCS and not lint */
#include <sys/param.h>
@ -431,6 +431,7 @@ _gethostbydnsaddr(addr, len, type)
querybuf buf;
register struct hostent *hp;
char qbuf[MAXDNAME+1];
int o_res_options = _res.options;
if (type != AF_INET)
return (NULL);
@ -439,7 +440,9 @@ _gethostbydnsaddr(addr, len, type)
((unsigned)addr[2] & 0xff),
((unsigned)addr[1] & 0xff),
((unsigned)addr[0] & 0xff));
_res.options |= RES_RECURSE;
n = res_query(qbuf, C_IN, T_PTR, (u_char *)buf.buf, sizeof buf.buf);
_res.options = o_res_options;
if (n < 0) {
if (_res.options & RES_DEBUG)
printf("res_query failed\n");