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authorUlrich Drepper <drepper@redhat.com>2000-07-19 22:03:58 +0000
committerUlrich Drepper <drepper@redhat.com>2000-07-19 22:03:58 +0000
commite685e07dfa9de08cd0b671e293b94efe116349fa (patch)
tree3c283589ea027f9b4ef9062366e9729e87efd46a /resolv/res_data.c
parent80ec4993cc416058f6f8e98ce32bd729e9be1150 (diff)
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Update.
2000-07-18 Mark Kettenis <kettenis@gnu.org> Update resolver code to BIND 8.2.3-T5B. * resolv/Versions [GLIBC_2.2] (libc): Add __res_init and __res_nclose. [GLIBC_2.2] (libresolv): Add __dn_expand, __ns_samename, __res_mkquery, __res_nsend, __res_query, __res_querydomain and __res_search. * resolv/Banner: BIND-8.2.3-T5B. * resolv/base64.c: Update from BIND 8.2.3-T5B. * resolv/herror.c: Likewise. * resolv/inet_addr.c: Likewise. * resolv/inet_net_ntop.c: Likewise. * resolv/inet_net_pton.c: Likewise. * resolv/inet_neta.c: Likewise. * resolv/inet_ntop.c: Likewise. * resolv/nsap_addr.c: Likewise. * resolv/inet_pton.c: Likewise. Reject a few more more invalid IPv6 addresses (ISC bug #520). * resolv/ns_name.c: Avoid emitting RCS ID in object file. * resolv/ns_parse.c: Likewise. * resolv/ns_netint.c: Likewise. * resolv/ns_samedomain.c: Likewise. * resolv/ns_ttl.c: Likewise. * resolv/ns_print.c: Update from BIND 8.2.3-T5B. Avoid emitting RCS ID in object file. * resolv/res_debug.c: Update from BIND 8.2.3-T5B. * resolv/res_mkquery.c: Likewise. * resolv/res_query.c: Likewise. * resolv/res_init.c: Likewise. (res_setoptions): Mark internal. * resolv/res_send.c: Likewise. [_LIBC]: Fully reinstate the code that avoids the FD_SETSIZE limit by using poll instead. * resolv/res_comp.c: Likewise. [SHLIB_COMPAT (libresolv, GLIBC_2_0, GLIBC_2_2)]: Make dn_expand a weak alias for __dn_expand. * resolv/res_data.c: Likewise. (res_close) [_LIBC]: Don't call res_nclose if RES_INIT isn't set in _res.options. Avoids a potential security risk by avoiding a close (0). [SHLIB_COMPAT (libresolv, GLIBC_2_0, GLIBC_2_2)]: Make res_mkquery, res_query, res_querydomain adn res_search weak aliases for __res_mkquery, __res_query, __res_querydomain and __res_search. * resolv/res_libc.c: (_res): Don't initialize. Fix res_close instead to avoid close(0). (res_init): Always use the static resolver context. [SHLIB_COMPAT (libc, GLIBC_2.0, GLIBC_2_2)]: Make res_init a weak alias for __res_init. * resolv/resolv.h: Update from BIND 8.2.3-T5B. Move definition of RES_SET_H_ERRNO and accompanying comment to... * include/resolv.h: ... here. * resolv/arpa/namser.h: Update from BIND 8.2.3-T5B. * resolv/arpa/nameser_compat.h: Likewise.
Diffstat (limited to 'resolv/res_data.c')
-rw-r--r--resolv/res_data.c35
1 files changed, 31 insertions, 4 deletions
diff --git a/resolv/res_data.c b/resolv/res_data.c
index a9f5a2a..c8aa5c5 100644
--- a/resolv/res_data.c
+++ b/resolv/res_data.c
@@ -16,7 +16,7 @@
*/
#if defined(LIBC_SCCS) && !defined(lint)
-static const char rcsid[] = "$Id$";
+static const char rcsid[] = "$BINDId: res_data.c,v 8.17 1999/10/13 17:11:31 vixie Exp $";
#endif /* LIBC_SCCS and not lint */
#include <sys/types.h>
@@ -31,6 +31,9 @@ static const char rcsid[] = "$Id$";
#include <ctype.h>
#include <netdb.h>
#include <resolv.h>
+#ifdef BIND_UPDATE
+#include <res_update.h>
+#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
@@ -67,11 +70,10 @@ const char *_res_sectioncodes[] = {
#endif
#ifndef __BIND_NOSTATIC
-
#ifdef _LIBC
extern struct __res_state _res;
#else
-/* The declaration has been moved to res_libc.c. */
+/* The definition has been moved to res_libc.c. */
struct __res_state _res
# if defined(__BIND_RES_TEXT)
= { RES_TIMEOUT, } /* Motorola, et al. */
@@ -85,7 +87,7 @@ int res_ourserver_p(const res_state, const struct sockaddr_in *);
void res_pquery(const res_state, const u_char *, int, FILE *);
#ifndef _LIBC
-/* Moved to res_libc.c since res_init should go into libc.so but the
+/* Moved to res_libc.c since res_init() should go into libc.so but the
rest of this file not. */
int
res_init(void) {
@@ -231,6 +233,17 @@ res_sendsigned(const u_char *buf, int buflen, ns_tsig_key *key,
void
res_close(void) {
+#ifdef _LIBC
+ /*
+ * Some stupid programs out there call res_close() before res_init().
+ * Since _res._vcsock isn't explicitly initialized, these means that
+ * we could do a close(0), which might lead to some security problems.
+ * Therefore we check if res_init() was called before by looking at
+ * the RES_INIT bit in _res.options. If it hasn't been set we bail out
+ * early. */
+ if ((_res.options & RES_INIT) == 0)
+ return;
+#endif
res_nclose(&_res);
}
@@ -302,3 +315,17 @@ local_hostname_length(const char *hostname) {
#endif /*ultrix*/
#endif
+
+
+#include <shlib-compat.h>
+
+#if SHLIB_COMPAT(libresolv, GLIBC_2_0, GLIBC_2_2)
+# undef res_mkquery
+# undef res_query
+# undef res_querydomain
+# undef res_search
+weak_alias (__res_mkquery, res_mkquery);
+weak_alias (__res_query, res_query);
+weak_alias (__res_querydomain, res_querydomain);
+weak_alias (__res_search, res_search);
+#endif