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.

resolv/res_debug.c

@@ -1,7 +1,7 @@
 /*
  * Copyright (c) 1985
  *    The Regents of the University of California.  All rights reserved.
- *
+ * 
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
@@ -13,7 +13,7 @@
  * 4. Neither the name of the University nor the names of its contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
- *
+ * 
  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
@@ -29,14 +29,14 @@
 
 /*
  * Portions Copyright (c) 1993 by Digital Equipment Corporation.
- *
+ * 
  * Permission to use, copy, modify, and distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
  * copyright notice and this permission notice appear in all copies, and that
  * the name of Digital Equipment Corporation not be used in advertising or
  * publicity pertaining to distribution of the document or software without
  * specific, written prior permission.
- *
+ * 
  * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
  * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
  * OF MERCHANTABILITY AND FITNESS.   IN NO EVENT SHALL DIGITAL EQUIPMENT
@@ -91,7 +91,7 @@
 
 #if defined(LIBC_SCCS) && !defined(lint)
 static const char sccsid[] = "@(#)res_debug.c	8.1 (Berkeley) 6/4/93";
-static const char rcsid[] = "$Id$";
+static const char rcsid[] = "$BINDId: res_debug.c,v 8.34 2000/02/29 05:30:55 vixie Exp $";
 #endif /* LIBC_SCCS and not lint */
 
 #include <sys/types.h>
@@ -141,7 +141,8 @@ do_section(const res_state statp,
 	   int pflag, FILE *file)
 {
 	int n, sflag, rrnum;
-	char buf[2048];	/* XXX need to malloc */
+	static int buflen = 2048;
+	char *buf;
 	ns_opcode opcode;
 	ns_rr rr;
 
@@ -152,6 +153,12 @@ do_section(const res_state statp,
 	if (statp->pfcode && !sflag)
 		return;
 
+	buf = malloc(buflen);
+	if (buf == NULL) {
+		fprintf(file, ";; memory allocation failure\n");
+		return;
+	}
+
 	opcode = (ns_opcode) ns_msg_getflag(*handle, ns_f_opcode);
 	rrnum = 0;
 	for (;;) {
@@ -162,7 +169,7 @@ do_section(const res_state statp,
 			else if (rrnum > 0 && sflag != 0 &&
 				 (statp->pfcode & RES_PRF_HEAD1))
 				putc('\n', file);
-			return;
+			goto cleanup;
 		}
 		if (rrnum == 0 && sflag != 0 && (statp->pfcode & RES_PRF_HEAD1))
 			fprintf(file, ";; %s SECTION:\n",
@@ -174,17 +181,32 @@ do_section(const res_state statp,
 				p_class(ns_rr_class(rr)));
 		else {
 			n = ns_sprintrr(handle, &rr, NULL, NULL,
-					buf, sizeof buf);
+					buf, buflen);
 			if (n < 0) {
+				if (errno == ENOSPC) {
+					free(buf);
+					buf = NULL;
+					if (buflen < 131072)
+						buf = malloc(buflen += 1024);
+					if (buf == NULL) {
+						fprintf(file,
+				              ";; memory allocation failure\n");
+					      return;
+					}
+					continue;
+				}
 				fprintf(file, ";; ns_sprintrr: %s\n",
 					strerror(errno));
-				return;
+				goto cleanup;
 			}
 			fputs(buf, file);
 			fputc('\n', file);
 		}
 		rrnum++;
 	}
+ cleanup:
+	if (buf != NULL)
+		free(buf);
 }
 
 /*
@@ -465,13 +487,8 @@ const char *
 sym_ntos(const struct res_sym *syms, int number, int *success) {
 	static char unname[20];
 
-#ifdef _LIBC
-	/* Changed to prevent warning. --drepper@gnu  */
-	for (; syms->name != 0; syms++) {
-#else
 	for ((void)NULL; syms->name != 0; syms++) {
-#endif
-	  if (number == syms->number) {
+		if (number == syms->number) {
 			if (success)
 				*success = 1;
 			return (syms->name);
@@ -488,12 +505,7 @@ const char *
 sym_ntop(const struct res_sym *syms, int number, int *success) {
 	static char unname[20];
 
-#ifdef _LIBC
-	/* Changed to prevent warning. --drepper@gnu  */
-	for (; syms->name != 0; syms++) {
-#else
 	for ((void)NULL; syms->name != 0; syms++) {
-#endif
 		if (number == syms->number) {
 			if (success)
 				*success = 1;
@@ -1012,7 +1024,7 @@ p_secstodate (u_long secs) {
 	struct tm *time;
 	
 #ifdef HAVE_TIME_R
-	struct time timebuf;
+	struct tm timebuf;
 	
 	time = gmtime_r(&clock, &timebuf);
 #else