4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync/*-
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Copyright (c) 1985, 1988, 1993
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * The Regents of the University of California. All rights reserved.
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 the University of
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * California, Berkeley, Intel Corporation, and its contributors.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync *
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * 4. Neither the name of University, Intel Corporation, or their respective
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * contributors may be used to endorse or promote products derived from
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * this software without specific prior written permission.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync *
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * THIS SOFTWARE IS PROVIDED BY THE REGENTS, INTEL CORPORATION AND
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS,
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * INTEL CORPORATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * -
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Portions Copyright (c) 1993 by Digital Equipment Corporation.
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, and that
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * the name of Digital Equipment Corporation not be used in advertising or
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * publicity pertaining to distribution of the document or software without
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * specific, written prior permission.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync *
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * CORPORATION 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 * --Copyright--
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync/* Portions Copyright (c) 1993 Carlos Leandro and Rui Salgueiro
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Dep. Matematica Universidade de Coimbra, Portugal, Europe
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
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#if defined(LIBC_SCCS) && !defined(lint)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncstatic char sccsid[] = "@(#)gethostnamadr.c 8.1 (Berkeley) 6/4/93";
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncstatic char rcsid[] = "$Id: getnetbydns.c,v 1.1.1.1 2003/11/19 01:51:27 kyu3 Exp $";
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#endif /* LIBC_SCCS and not lint */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#include <sys/param.h>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#include <sys/socket.h>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#include <netinet/in.h>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#include <arpa/inet.h>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#include <arpa/nameser.h>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#include <stdio.h>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#include <netdb.h>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#include <resolv.h>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#include <ctype.h>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#include <errno.h>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#include <string.h>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#include <unistd.h>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#ifdef _ORG_FREEBSD_
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#include <syslog.h>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#endif
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#include "res_config.h"
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#include "Socklib_internals.h"
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncextern int h_errno;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#define BYADDR 0
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#define BYNAME 1
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#define MAXALIASES 35
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#if PACKETSZ > 1024
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#define MAXPACKET PACKETSZ
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#else
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#define MAXPACKET 1024
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#endif
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsynctypedef union {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync HEADER hdr;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync u_char buf[MAXPACKET];
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync} querybuf;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsynctypedef union {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync long al;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync char ac;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync} align;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncstatic struct netent *
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncgetnetanswer(querybuf *answer, int anslen, int net_i)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync{
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync register HEADER *hp;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync register u_char *cp;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync register int n;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync u_char *eom;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync int type, class, buflen, ancount, qdcount, haveanswer, i, nchar;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync char aux1[MAXHOSTNAMELEN], aux2[MAXHOSTNAMELEN], ans[MAXHOSTNAMELEN];
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync char *in, *st, *pauxt, *bp, **ap;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync char *paux1 = &aux1[0], *paux2 = &aux2[0], flag = 0;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncstatic struct netent net_entry;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncstatic char *net_aliases[MAXALIASES], netbuf[PACKETSZ];
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync /*
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * find first satisfactory answer
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync *
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * answer --> +------------+ ( MESSAGE )
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * | Header |
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * +------------+
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * | Question | the question for the name server
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * +------------+
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * | Answer | RRs answering the question
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * +------------+
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * | Authority | RRs pointing toward an authority
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * | Additional | RRs holding additional information
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * +------------+
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync eom = answer->buf + anslen;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync hp = &answer->hdr;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync ancount = ntohs(hp->ancount); /* #/records in the answer section */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync qdcount = ntohs(hp->qdcount); /* #/entries in the question section */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync bp = netbuf;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync buflen = sizeof(netbuf);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync cp = answer->buf + HFIXEDSZ;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (!qdcount) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (hp->aa)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync h_errno = HOST_NOT_FOUND;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync else
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync h_errno = TRY_AGAIN;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync return (NULL);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync }
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync while (qdcount-- > 0)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync cp += __dn_skipname(cp, eom) + QFIXEDSZ;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync ap = net_aliases;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync *ap = NULL;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync net_entry.n_aliases = net_aliases;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync haveanswer = 0;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync while (--ancount >= 0 && cp < eom) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync n = dn_expand(answer->buf, eom, cp, bp, buflen);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if ((n < 0) || !res_dnok(bp))
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync break;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync cp += n;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync ans[0] = '\0';
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync (void)strncpy(&ans[0], bp, sizeof(ans) - 1);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync ans[sizeof(ans) - 1] = '\0';
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync GETSHORT(type, cp);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync GETSHORT(class, cp);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync cp += INT32SZ; /* TTL */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync GETSHORT(n, cp);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (class == C_IN && type == T_PTR) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync n = dn_expand(answer->buf, eom, cp, bp, buflen);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if ((n < 0) || !res_hnok(bp)) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync cp += n;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync return (NULL);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync }
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync cp += n;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync *ap++ = bp;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync bp += strlen(bp) + 1;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync net_entry.n_addrtype =
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync (class == C_IN) ? AF_INET : AF_UNSPEC;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync haveanswer++;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync }
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync }
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (haveanswer) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync *ap = NULL;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync switch (net_i) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync case BYADDR:
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync net_entry.n_name = *net_entry.n_aliases;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync net_entry.n_net = 0L;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync break;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync case BYNAME:
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync in = *net_entry.n_aliases;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync net_entry.n_name = &ans[0];
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync aux2[0] = '\0';
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync for (i = 0; i < 4; i++) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync for (st = in, nchar = 0;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync *st != '.';
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync st++, nchar++)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync ;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (nchar != 1 || *in != '0' || flag) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync flag = 1;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync (void)strncpy(paux1,
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync (i==0) ? in : in-1,
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync (i==0) ?nchar : nchar+1);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync paux1[(i==0) ? nchar : nchar+1] = '\0';
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync pauxt = paux2;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync paux2 = strcat(paux1, paux2);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync paux1 = pauxt;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync }
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync in = ++st;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync }
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync net_entry.n_net = inet_network(paux2);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync break;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync }
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync net_entry.n_aliases++;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync return (&net_entry);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync }
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync h_errno = TRY_AGAIN;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync return (NULL);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync}
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncstruct netent *
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync_getnetbydnsaddr(register unsigned long net, register int net_type)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync{
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync unsigned int netbr[4];
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync int nn, anslen;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync querybuf buf;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync char qbuf[MAXDNAME];
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync unsigned long net2;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync struct netent *net_entry;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (net_type != AF_INET)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync return (NULL);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync for (nn = 4, net2 = net; net2; net2 >>= 8)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync netbr[--nn] = net2 & 0xff;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync switch (nn) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync case 3: /* Class A */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync sprintf(qbuf, "0.0.0.%u.in-addr.arpa", netbr[3]);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync break;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync case 2: /* Class B */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync sprintf(qbuf, "0.0.%u.%u.in-addr.arpa", netbr[3], netbr[2]);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync break;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync case 1: /* Class C */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync sprintf(qbuf, "0.%u.%u.%u.in-addr.arpa", netbr[3], netbr[2],
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync netbr[1]);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync break;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync case 0: /* Class D - E */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync sprintf(qbuf, "%u.%u.%u.%u.in-addr.arpa", netbr[3], netbr[2],
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync netbr[1], netbr[0]);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync break;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync }
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync anslen = res_query(qbuf, C_IN, T_PTR, (u_char *)&buf, sizeof(buf));
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (anslen < 0) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#ifdef DEBUG
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (_res.options & RES_DEBUG)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync printf("res_query failed\n");
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#endif
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync return (NULL);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync }
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync net_entry = getnetanswer(&buf, anslen, BYADDR);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (net_entry) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync unsigned u_net = net; /* maybe net should be unsigned ? */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync /* Strip trailing zeros */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync while ((u_net & 0xff) == 0 && u_net != 0)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync u_net >>= 8;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync net_entry->n_net = u_net;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync return (net_entry);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync }
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync return (NULL);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync}
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncstruct netent *
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync_getnetbydnsname(register const char *net)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync{
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync int anslen;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync querybuf buf;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync char qbuf[MAXDNAME];
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if ((_res.options & RES_INIT) == 0 && res_init() == -1) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync h_errno = NETDB_INTERNAL;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync return (NULL);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync }
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync strncpy(qbuf, net, sizeof(qbuf) - 1);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync qbuf[sizeof(qbuf) - 1] = '\0';
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync anslen = res_search(qbuf, C_IN, T_PTR, (u_char *)&buf, sizeof(buf));
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (anslen < 0) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#ifdef DEBUG
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (_res.options & RES_DEBUG)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync printf("res_query failed\n");
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#endif
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync return (NULL);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync }
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync return getnetanswer(&buf, anslen, BYNAME);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync}
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncvoid
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync_setnetdnsent(int stayopen)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync{
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (stayopen)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync _res.options |= RES_STAYOPEN | RES_USEVC;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync}
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncvoid
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync_endnetdnsent()
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync{
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync _res.options &= ~(RES_STAYOPEN | RES_USEVC);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync res_close();
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync}