StdLib/BsdSocketLib/res_mkupdate.c

4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync/*
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Copyright (c) 1996 by Internet Software Consortium.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync *
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Permission to use, copy, modify, and distribute this software for any
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * purpose with or without fee is hereby granted, provided that the above
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * copyright notice and this permission notice appear in all copies.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync *
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * SOFTWARE.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync/*
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Portions copyright (c) 1999, 2000
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Intel Corporation.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * All rights reserved.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync *
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Redistribution and use in source and binary forms, with or without
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * modification, are permitted provided that the following conditions
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * are met:
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync *
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * 1. Redistributions of source code must retain the above copyright
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync *    notice, this list of conditions and the following disclaimer.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync *
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * 2. Redistributions in binary form must reproduce the above copyright
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync *    notice, this list of conditions and the following disclaimer in the
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync *    documentation and/or other materials provided with the distribution.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync *
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * 3. All advertising materials mentioning features or use of this software
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync *    must display the following acknowledgement:
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync *
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync *    This product includes software developed by Intel Corporation and
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync *    its contributors.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync *
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * 4. Neither the name of Intel Corporation or its contributors may be
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync *    used to endorse or promote products derived from this software
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync *    without specific prior written permission.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync *
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * THIS SOFTWARE IS PROVIDED BY INTEL CORPORATION AND CONTRIBUTORS ``AS IS''
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * ARE DISCLAIMED.  IN NO EVENT SHALL INTEL CORPORATION OR CONTRIBUTORS BE
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * THE POSSIBILITY OF SUCH DAMAGE.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync *
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync/*
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Based on the Dynamic DNS reference implementation by Viraj Bais
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * <viraj_bais@ccm.fm.intel.com>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#if !defined(lint) && !defined(SABER)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncstatic char rcsid[] = "$Id: res_mkupdate.c,v 1.1.1.1 2003/11/19 01:51:38 kyu3 Exp $";
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#endif /* not lint */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#include <sys/types.h>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#include <sys/param.h>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#include <netinet/in.h>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#include <arpa/nameser.h>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#include <arpa/inet.h>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#include <errno.h>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#include <limits.h>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#include <netdb.h>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#include <resolv.h>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#include <stdio.h>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#include <stdlib.h>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#include <string.h>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#include <unistd.h>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#include <ctype.h>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#include "res_config.h"
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncstatic int getnum_str(u_char **, u_char *);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncstatic int getword_str(char *, int, u_char **, u_char *);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#define ShrinkBuffer(x)  if ((buflen -= x) < 0) return (-2);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync/*
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Form update packets.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Returns the size of the resulting packet if no error
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * On error,
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync *  returns -1 if error in reading a word/number in rdata
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync *         portion for update packets
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync *      -2 if length of buffer passed is insufficient
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync *      -3 if zone section is not the first section in
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync *         the linked list, or section order has a problem
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync *      -4 on a number overflow
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync *      -5 unknown operation or no records
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncint
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncres_mkupdate(ns_updrec *rrecp_in, u_char *buf, int buflen) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync    ns_updrec *rrecp_start = rrecp_in;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync    HEADER *hp;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync    u_char *cp, *sp1, *sp2, *startp, *endp;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync    int n, i, soanum, multiline;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync    ns_updrec *rrecp;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync    struct in_addr ina;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        char buf2[MAXDNAME];
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync    int section, numrrs = 0, counts[ns_s_max];
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync    u_int16_t rtype, rclass;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync    u_int32_t n1, rttl;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync    u_char *dnptrs[20], **dpp, **lastdnptr;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync    if ((_res.options & RES_INIT) == 0 && res_init() == -1) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        h_errno = NETDB_INTERNAL;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        return (-1);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync    }
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync    /*
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync     * Initialize header fields.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync     */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync    if ((buf == NULL) || (buflen < HFIXEDSZ))
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        return (-1);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync    memset(buf, 0, HFIXEDSZ);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync    hp = (HEADER *) buf;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync    hp->id = htons(++_res.id);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync    hp->opcode = ns_o_update;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync    hp->rcode = NOERROR;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync    sp1 = buf + 2*INT16SZ;  /* save pointer to zocount */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync    cp = buf + HFIXEDSZ;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync    buflen -= HFIXEDSZ;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync    dpp = dnptrs;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync    *dpp++ = buf;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync    *dpp++ = NULL;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync    lastdnptr = dnptrs + sizeof dnptrs / sizeof dnptrs[0];
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync    if (rrecp_start == NULL)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        return (-5);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync    else if (rrecp_start->r_section != S_ZONE)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        return (-3);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync    memset(counts, 0, sizeof counts);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync    for (rrecp = rrecp_start; rrecp; rrecp = rrecp->r_grpnext) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        numrrs++;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                section = rrecp->r_section;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        if (section < 0 || section >= ns_s_max)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            return (-1);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        counts[section]++;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        for (i = section + 1; i < ns_s_max; i++)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            if (counts[i])
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                return (-3);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        rtype = rrecp->r_type;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        rclass = rrecp->r_class;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        rttl = rrecp->r_ttl;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        /* overload class and type */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        if (section == S_PREREQ) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            rttl = 0;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            switch (rrecp->r_opcode) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            case YXDOMAIN:
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                rclass = C_ANY;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                rtype = T_ANY;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                rrecp->r_size = 0;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                break;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            case NXDOMAIN:
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                rclass = C_NONE;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                rtype = T_ANY;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                rrecp->r_size = 0;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                break;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            case NXRRSET:
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                rclass = C_NONE;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                rrecp->r_size = 0;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                break;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            case YXRRSET:
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                if (rrecp->r_size == 0)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                    rclass = C_ANY;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                break;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            default:
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                fprintf(stderr,
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                    "res_mkupdate: incorrect opcode: %d\n",
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                    rrecp->r_opcode);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                fflush(stderr);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                return (-1);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            }
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        } else if (section == S_UPDATE) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            switch (rrecp->r_opcode) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            case DELETE:
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                rclass = rrecp->r_size == 0 ? C_ANY : C_NONE;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                break;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            case ADD:
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                break;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            default:
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                fprintf(stderr,
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                    "res_mkupdate: incorrect opcode: %d\n",
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                    rrecp->r_opcode);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                fflush(stderr);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                return (-1);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            }
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        }
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        /*
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync         * XXX  appending default domain to owner name is omitted,
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync         *  fqdn must be provided
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync         */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        if ((n = dn_comp(rrecp->r_dname, cp, buflen, dnptrs,
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                 lastdnptr)) < 0)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            return (-1);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        cp += n;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        ShrinkBuffer(n + 2*INT16SZ);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        PUTSHORT(rtype, cp);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        PUTSHORT(rclass, cp);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        if (section == S_ZONE) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            if (numrrs != 1 || rrecp->r_type != T_SOA)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                return (-3);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            continue;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        }
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        ShrinkBuffer(INT32SZ + INT16SZ);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        PUTLONG(rttl, cp);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        sp2 = cp;  /* save pointer to length byte */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        cp += INT16SZ;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        if (rrecp->r_size == 0) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            if (section == S_UPDATE && rclass != C_ANY)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                return (-1);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            else {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                PUTSHORT(0, sp2);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                continue;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            }
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        }
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        startp = rrecp->r_data;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        endp = startp + rrecp->r_size - 1;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        /* XXX this should be done centrally. */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        switch (rrecp->r_type) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        case T_A:
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            if (!getword_str(buf2, sizeof buf2, &startp, endp))
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                return (-1);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            if (!inet_aton(buf2, &ina))
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                return (-1);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            n1 = ntohl(ina.s_addr);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            ShrinkBuffer(INT32SZ);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            PUTLONG(n1, cp);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            break;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        case T_CNAME:
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        case T_MB:
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        case T_MG:
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        case T_MR:
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        case T_NS:
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        case T_PTR:
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            if (!getword_str(buf2, sizeof buf2, &startp, endp))
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                return (-1);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            n = dn_comp(buf2, cp, buflen, dnptrs, lastdnptr);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            if (n < 0)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                return (-1);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            cp += n;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            ShrinkBuffer(n);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            break;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        case T_MINFO:
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        case T_SOA:
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        case T_RP:
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            for (i = 0; i < 2; i++) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                if (!getword_str(buf2, sizeof buf2, &startp,
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                         endp))
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                return (-1);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                n = dn_comp(buf2, cp, buflen,
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                        dnptrs, lastdnptr);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                if (n < 0)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                    return (-1);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                cp += n;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                ShrinkBuffer(n);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            }
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            if (rrecp->r_type == T_SOA) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                ShrinkBuffer(5 * INT32SZ);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                while (isspace(*startp) || !*startp)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                    startp++;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                if (*startp == '(') {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                    multiline = 1;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                    startp++;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                } else
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                    multiline = 0;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                /* serial, refresh, retry, expire, minimum */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                for (i = 0; i < 5; i++) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                    soanum = getnum_str(&startp, endp);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                    if (soanum < 0)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                        return (-1);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                    PUTLONG(soanum, cp);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                }
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                if (multiline) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                    while (isspace(*startp) || !*startp)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                        startp++;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                    if (*startp != ')')
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                        return (-1);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                }
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            }
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            break;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        case T_MX:
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        case T_AFSDB:
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        case T_RT:
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            n = getnum_str(&startp, endp);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            if (n < 0)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                return (-1);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            PUTSHORT(n, cp);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            ShrinkBuffer(INT16SZ);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            if (!getword_str(buf2, sizeof buf2, &startp, endp))
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                return (-1);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            n = dn_comp(buf2, cp, buflen, dnptrs, lastdnptr);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            if (n < 0)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                return (-1);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            cp += n;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            ShrinkBuffer(n);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            break;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        case T_PX:
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            n = getnum_str(&startp, endp);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            if (n < 0)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                return (-1);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            PUTSHORT(n, cp);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            ShrinkBuffer(INT16SZ);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            for (i = 0; i < 2; i++) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                if (!getword_str(buf2, sizeof buf2, &startp,
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                         endp))
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                    return (-1);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                n = dn_comp(buf2, cp, buflen, dnptrs,
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                        lastdnptr);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                if (n < 0)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                    return (-1);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                cp += n;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                ShrinkBuffer(n);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            }
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            break;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        case T_WKS:
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        case T_HINFO:
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        case T_TXT:
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        case T_X25:
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        case T_ISDN:
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        case T_NSAP:
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        case T_LOC:
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            /* XXX - more fine tuning needed here */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            ShrinkBuffer(rrecp->r_size);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            memcpy(cp, rrecp->r_data, rrecp->r_size);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            cp += rrecp->r_size;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            break;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        default:
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            return (-1);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        } /*switch*/
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        n = (u_int16_t)((cp - sp2) - INT16SZ);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        PUTSHORT(n, sp2);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync    } /*for*/
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync    hp->qdcount = htons(counts[0]);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync    hp->ancount = htons(counts[1]);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync    hp->nscount = htons(counts[2]);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync    hp->arcount = htons(counts[3]);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync    return ((int)(cp - buf));
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync}
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync/*
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Get a whitespace delimited word from a string (not file)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * into buf. modify the start pointer to point after the
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * word in the string.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncstatic int
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncgetword_str(char *buf, int size, u_char **startpp, u_char *endp) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        char *cp;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        int c;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        for (cp = buf; *startpp <= endp; ) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                c = **startpp;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                if (isspace(c) || c == '\0') {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                        if (cp != buf) /* trailing whitespace */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                                break;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                        else { /* leading whitespace */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                                (*startpp)++;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                                continue;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                        }
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                }
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                (*startpp)++;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                if (cp >= buf+size-1)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                        break;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                *cp++ = (u_char)c;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        }
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        *cp = '\0';
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        return (cp != buf);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync}
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync/*
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Get a whitespace delimited number from a string (not file) into buf
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * update the start pointer to point after the number in the string.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncstatic int
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncgetnum_str(u_char **startpp, u_char *endp) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        int c;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        int n;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        int seendigit = 0;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        int m = 0;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        for (n = 0; *startpp <= endp; ) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                c = **startpp;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                if (isspace(c) || c == '\0') {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                        if (seendigit) /* trailing whitespace */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                                break;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                        else { /* leading whitespace */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                                (*startpp)++;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                                continue;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                        }
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                }
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                if (c == ';') {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                        while ((*startpp <= endp) &&
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                   ((c = **startpp) != '\n'))
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                    (*startpp)++;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                        if (seendigit)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                                break;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                        continue;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                }
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                if (!isdigit(c)) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                        if (c == ')' && seendigit) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                                (*startpp)--;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                                break;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                        }
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync            return (-1);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                }
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                (*startpp)++;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                n = n * 10 + (c - '0');
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync                seendigit = 1;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        }
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        return (n + m);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync}
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync/*
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Allocate a resource record buffer & save rr info.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncns_updrec *
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncres_mkupdrec(int section, const char *dname,
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync         u_int class, u_int type, u_long ttl) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync    ns_updrec *rrecp = (ns_updrec *)calloc(1, sizeof(ns_updrec));
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync    if (!rrecp || !(rrecp->r_dname = strdup(dname)))
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        return (NULL);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync    rrecp->r_class = (u_int16_t)class;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync    rrecp->r_type = (u_int16_t)type;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync    rrecp->r_ttl = (u_int32_t)ttl;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync    rrecp->r_section = (u_int8_t)section;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync    return (rrecp);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync}
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync/*
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Free a resource record buffer created by res_mkupdrec.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncvoid
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncres_freeupdrec(ns_updrec *rrecp) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync    /* Note: freeing r_dp is the caller's responsibility. */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync    if (rrecp->r_dname != NULL)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync        free(rrecp->r_dname);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync    free(rrecp);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync}