1fceb383a3f0b59711832b9dc4e8329d7f216604semery/*
1fceb383a3f0b59711832b9dc4e8329d7f216604semery * CDDL HEADER START
1fceb383a3f0b59711832b9dc4e8329d7f216604semery *
1fceb383a3f0b59711832b9dc4e8329d7f216604semery * The contents of this file are subject to the terms of the
1fceb383a3f0b59711832b9dc4e8329d7f216604semery * Common Development and Distribution License (the "License").
1fceb383a3f0b59711832b9dc4e8329d7f216604semery * You may not use this file except in compliance with the License.
1fceb383a3f0b59711832b9dc4e8329d7f216604semery *
1fceb383a3f0b59711832b9dc4e8329d7f216604semery * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
1fceb383a3f0b59711832b9dc4e8329d7f216604semery * or http://www.opensolaris.org/os/licensing.
1fceb383a3f0b59711832b9dc4e8329d7f216604semery * See the License for the specific language governing permissions
1fceb383a3f0b59711832b9dc4e8329d7f216604semery * and limitations under the License.
1fceb383a3f0b59711832b9dc4e8329d7f216604semery *
1fceb383a3f0b59711832b9dc4e8329d7f216604semery * When distributing Covered Code, include this CDDL HEADER in each
1fceb383a3f0b59711832b9dc4e8329d7f216604semery * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
1fceb383a3f0b59711832b9dc4e8329d7f216604semery * If applicable, add the following below this CDDL HEADER, with the
1fceb383a3f0b59711832b9dc4e8329d7f216604semery * fields enclosed by brackets "[]" replaced with your own identifying
1fceb383a3f0b59711832b9dc4e8329d7f216604semery * information: Portions Copyright [yyyy] [name of copyright owner]
1fceb383a3f0b59711832b9dc4e8329d7f216604semery *
1fceb383a3f0b59711832b9dc4e8329d7f216604semery * CDDL HEADER END
1fceb383a3f0b59711832b9dc4e8329d7f216604semery */
1fceb383a3f0b59711832b9dc4e8329d7f216604semery
1fceb383a3f0b59711832b9dc4e8329d7f216604semery/*
bd211b8556ef6b18ebf137419bd5555d65271664semery * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
1fceb383a3f0b59711832b9dc4e8329d7f216604semery * Use is subject to license terms.
1fceb383a3f0b59711832b9dc4e8329d7f216604semery */
9c62f9ec8ed42265fb80cb8d6873fabfae3941abMarcel Telka/*
9c62f9ec8ed42265fb80cb8d6873fabfae3941abMarcel Telka * Copyright 2014 Nexenta Systems, Inc. All rights reserved.
9c62f9ec8ed42265fb80cb8d6873fabfae3941abMarcel Telka */
1fceb383a3f0b59711832b9dc4e8329d7f216604semery
1fceb383a3f0b59711832b9dc4e8329d7f216604semery#include <sys/types.h>
1fceb383a3f0b59711832b9dc4e8329d7f216604semery#include <netinet/in.h>
1fceb383a3f0b59711832b9dc4e8329d7f216604semery#include <arpa/nameser.h>
1fceb383a3f0b59711832b9dc4e8329d7f216604semery#include <resolv.h>
1fceb383a3f0b59711832b9dc4e8329d7f216604semery#include <netdb.h>
1fceb383a3f0b59711832b9dc4e8329d7f216604semery#include <limits.h>
1fceb383a3f0b59711832b9dc4e8329d7f216604semery#include <stdlib.h>
1fceb383a3f0b59711832b9dc4e8329d7f216604semery#include <string.h>
1fceb383a3f0b59711832b9dc4e8329d7f216604semery#include <unistd.h>
1fceb383a3f0b59711832b9dc4e8329d7f216604semery#include <ctype.h>
1fceb383a3f0b59711832b9dc4e8329d7f216604semery
bd211b8556ef6b18ebf137419bd5555d65271664semery/*
bd211b8556ef6b18ebf137419bd5555d65271664semery * Private resolver of target and type with arguments:
bd211b8556ef6b18ebf137419bd5555d65271664semery * klooukp [ target [ RR_type ] ]
bd211b8556ef6b18ebf137419bd5555d65271664semery *
bd211b8556ef6b18ebf137419bd5555d65271664semery * Utitilizes DNS lookups to discover domain and realm information. This CLI
bd211b8556ef6b18ebf137419bd5555d65271664semery * is used primarily by kdcmgr(1M) and kclient(1M).
bd211b8556ef6b18ebf137419bd5555d65271664semery */
bd211b8556ef6b18ebf137419bd5555d65271664semery
1fceb383a3f0b59711832b9dc4e8329d7f216604semeryint
1fceb383a3f0b59711832b9dc4e8329d7f216604semery/* ARGSUSED */
1fceb383a3f0b59711832b9dc4e8329d7f216604semerymain(int argc, char **argv)
1fceb383a3f0b59711832b9dc4e8329d7f216604semery{
bd211b8556ef6b18ebf137419bd5555d65271664semery unsigned char answer[NS_MAXMSG], *ansp = NULL, *end, a, b, c, d;
1fceb383a3f0b59711832b9dc4e8329d7f216604semery int len = 0, anslen, hostlen, nq, na, type, class;
bd211b8556ef6b18ebf137419bd5555d65271664semery int ttl, priority, weight, port, size;
bd211b8556ef6b18ebf137419bd5555d65271664semery char name[NS_MAXDNAME], *cp, *typestr = NULL;
bd211b8556ef6b18ebf137419bd5555d65271664semery char nbuf[INET6_ADDRSTRLEN];
1fceb383a3f0b59711832b9dc4e8329d7f216604semery struct __res_state stat;
1fceb383a3f0b59711832b9dc4e8329d7f216604semery int found = 0;
bd211b8556ef6b18ebf137419bd5555d65271664semery int rr_type = T_A;
1fceb383a3f0b59711832b9dc4e8329d7f216604semery HEADER *h;
1fceb383a3f0b59711832b9dc4e8329d7f216604semery
bd211b8556ef6b18ebf137419bd5555d65271664semery if (argc > 3)
1fceb383a3f0b59711832b9dc4e8329d7f216604semery exit(1);
1fceb383a3f0b59711832b9dc4e8329d7f216604semery
bd211b8556ef6b18ebf137419bd5555d65271664semery if (argc == 1) {
bd211b8556ef6b18ebf137419bd5555d65271664semery if (gethostname(name, MAXHOSTNAMELEN) != 0)
bd211b8556ef6b18ebf137419bd5555d65271664semery exit(1);
bd211b8556ef6b18ebf137419bd5555d65271664semery } else {
bd211b8556ef6b18ebf137419bd5555d65271664semery (void) strncpy(name, (char *)argv[1], NS_MAXDNAME);
bd211b8556ef6b18ebf137419bd5555d65271664semery if (argc == 3) {
bd211b8556ef6b18ebf137419bd5555d65271664semery typestr = argv[2];
bd211b8556ef6b18ebf137419bd5555d65271664semery
bd211b8556ef6b18ebf137419bd5555d65271664semery switch (*typestr) {
bd211b8556ef6b18ebf137419bd5555d65271664semery case 'A':
bd211b8556ef6b18ebf137419bd5555d65271664semery rr_type = T_A;
bd211b8556ef6b18ebf137419bd5555d65271664semery break;
bd211b8556ef6b18ebf137419bd5555d65271664semery case 'C':
bd211b8556ef6b18ebf137419bd5555d65271664semery rr_type = T_CNAME;
bd211b8556ef6b18ebf137419bd5555d65271664semery break;
bd211b8556ef6b18ebf137419bd5555d65271664semery case 'I':
bd211b8556ef6b18ebf137419bd5555d65271664semery rr_type = T_A;
bd211b8556ef6b18ebf137419bd5555d65271664semery break;
bd211b8556ef6b18ebf137419bd5555d65271664semery case 'P':
bd211b8556ef6b18ebf137419bd5555d65271664semery rr_type = T_PTR;
9c62f9ec8ed42265fb80cb8d6873fabfae3941abMarcel Telka (void) sscanf(name, "%hhd.%hhd.%hhd.%hhd",
bd211b8556ef6b18ebf137419bd5555d65271664semery &a, &b, &c, &d);
bd211b8556ef6b18ebf137419bd5555d65271664semery (void) sprintf(name, "%d.%d.%d.%d.in-addr.arpa",
bd211b8556ef6b18ebf137419bd5555d65271664semery d, c, b, a);
bd211b8556ef6b18ebf137419bd5555d65271664semery break;
bd211b8556ef6b18ebf137419bd5555d65271664semery case 'S':
bd211b8556ef6b18ebf137419bd5555d65271664semery rr_type = T_SRV;
bd211b8556ef6b18ebf137419bd5555d65271664semery break;
bd211b8556ef6b18ebf137419bd5555d65271664semery default:
bd211b8556ef6b18ebf137419bd5555d65271664semery exit(1);
bd211b8556ef6b18ebf137419bd5555d65271664semery }
bd211b8556ef6b18ebf137419bd5555d65271664semery }
bd211b8556ef6b18ebf137419bd5555d65271664semery }
1fceb383a3f0b59711832b9dc4e8329d7f216604semery
1fceb383a3f0b59711832b9dc4e8329d7f216604semery (void) memset(&stat, 0, sizeof (stat));
1fceb383a3f0b59711832b9dc4e8329d7f216604semery
1fceb383a3f0b59711832b9dc4e8329d7f216604semery if (res_ninit(&stat) == -1)
1fceb383a3f0b59711832b9dc4e8329d7f216604semery exit(1);
1fceb383a3f0b59711832b9dc4e8329d7f216604semery
1fceb383a3f0b59711832b9dc4e8329d7f216604semery anslen = sizeof (answer);
bd211b8556ef6b18ebf137419bd5555d65271664semery len = res_nsearch(&stat, name, C_IN, rr_type, answer, anslen);
1fceb383a3f0b59711832b9dc4e8329d7f216604semery
bd211b8556ef6b18ebf137419bd5555d65271664semery if (len < sizeof (HEADER)) {
bd211b8556ef6b18ebf137419bd5555d65271664semery res_ndestroy(&stat);
1fceb383a3f0b59711832b9dc4e8329d7f216604semery exit(1);
bd211b8556ef6b18ebf137419bd5555d65271664semery }
1fceb383a3f0b59711832b9dc4e8329d7f216604semery
1fceb383a3f0b59711832b9dc4e8329d7f216604semery ansp = answer;
1fceb383a3f0b59711832b9dc4e8329d7f216604semery end = ansp + anslen;
1fceb383a3f0b59711832b9dc4e8329d7f216604semery
1fceb383a3f0b59711832b9dc4e8329d7f216604semery /* LINTED */
1fceb383a3f0b59711832b9dc4e8329d7f216604semery h = (HEADER *)answer;
1fceb383a3f0b59711832b9dc4e8329d7f216604semery nq = ntohs(h->qdcount);
1fceb383a3f0b59711832b9dc4e8329d7f216604semery na = ntohs(h->ancount);
1fceb383a3f0b59711832b9dc4e8329d7f216604semery ansp += HFIXEDSZ;
1fceb383a3f0b59711832b9dc4e8329d7f216604semery
bd211b8556ef6b18ebf137419bd5555d65271664semery if (nq != 1 || na < 1) {
bd211b8556ef6b18ebf137419bd5555d65271664semery res_ndestroy(&stat);
1fceb383a3f0b59711832b9dc4e8329d7f216604semery exit(1);
bd211b8556ef6b18ebf137419bd5555d65271664semery }
1fceb383a3f0b59711832b9dc4e8329d7f216604semery
bd211b8556ef6b18ebf137419bd5555d65271664semery hostlen = sizeof (name);
bd211b8556ef6b18ebf137419bd5555d65271664semery len = dn_expand(answer, end, ansp, name, hostlen);
bd211b8556ef6b18ebf137419bd5555d65271664semery if (len < 0) {
bd211b8556ef6b18ebf137419bd5555d65271664semery res_ndestroy(&stat);
1fceb383a3f0b59711832b9dc4e8329d7f216604semery exit(1);
bd211b8556ef6b18ebf137419bd5555d65271664semery }
1fceb383a3f0b59711832b9dc4e8329d7f216604semery
1fceb383a3f0b59711832b9dc4e8329d7f216604semery ansp += len + QFIXEDSZ;
1fceb383a3f0b59711832b9dc4e8329d7f216604semery
bd211b8556ef6b18ebf137419bd5555d65271664semery if (ansp > end) {
bd211b8556ef6b18ebf137419bd5555d65271664semery res_ndestroy(&stat);
1fceb383a3f0b59711832b9dc4e8329d7f216604semery exit(1);
bd211b8556ef6b18ebf137419bd5555d65271664semery }
1fceb383a3f0b59711832b9dc4e8329d7f216604semery
1fceb383a3f0b59711832b9dc4e8329d7f216604semery while (na-- > 0 && ansp < end) {
bd211b8556ef6b18ebf137419bd5555d65271664semery
bd211b8556ef6b18ebf137419bd5555d65271664semery len = dn_expand(answer, end, ansp, name, hostlen);
1fceb383a3f0b59711832b9dc4e8329d7f216604semery
1fceb383a3f0b59711832b9dc4e8329d7f216604semery if (len < 0)
1fceb383a3f0b59711832b9dc4e8329d7f216604semery continue;
bd211b8556ef6b18ebf137419bd5555d65271664semery ansp += len; /* name */
bd211b8556ef6b18ebf137419bd5555d65271664semery NS_GET16(type, ansp); /* type */
bd211b8556ef6b18ebf137419bd5555d65271664semery NS_GET16(class, ansp); /* class */
bd211b8556ef6b18ebf137419bd5555d65271664semery NS_GET32(ttl, ansp); /* ttl */
bd211b8556ef6b18ebf137419bd5555d65271664semery NS_GET16(size, ansp); /* size */
bd211b8556ef6b18ebf137419bd5555d65271664semery
bd211b8556ef6b18ebf137419bd5555d65271664semery if ((ansp + size) > end) {
bd211b8556ef6b18ebf137419bd5555d65271664semery res_ndestroy(&stat);
bd211b8556ef6b18ebf137419bd5555d65271664semery exit(1);
bd211b8556ef6b18ebf137419bd5555d65271664semery }
bd211b8556ef6b18ebf137419bd5555d65271664semery if (type == T_SRV) {
bd211b8556ef6b18ebf137419bd5555d65271664semery NS_GET16(priority, ansp);
bd211b8556ef6b18ebf137419bd5555d65271664semery NS_GET16(weight, ansp);
bd211b8556ef6b18ebf137419bd5555d65271664semery NS_GET16(port, ansp);
bd211b8556ef6b18ebf137419bd5555d65271664semery len = dn_expand(answer, end, ansp, name, hostlen);
bd211b8556ef6b18ebf137419bd5555d65271664semery if (len < 0) {
bd211b8556ef6b18ebf137419bd5555d65271664semery res_ndestroy(&stat);
bd211b8556ef6b18ebf137419bd5555d65271664semery exit(1);
bd211b8556ef6b18ebf137419bd5555d65271664semery }
bd211b8556ef6b18ebf137419bd5555d65271664semery for (cp = name; *cp; cp++) {
bd211b8556ef6b18ebf137419bd5555d65271664semery *cp = tolower(*cp);
bd211b8556ef6b18ebf137419bd5555d65271664semery }
bd211b8556ef6b18ebf137419bd5555d65271664semery (void) printf("%s %d\n", name, port);
bd211b8556ef6b18ebf137419bd5555d65271664semery } else if (typestr && *typestr == 'I') {
bd211b8556ef6b18ebf137419bd5555d65271664semery (void) inet_ntop(AF_INET, (void *)ansp, nbuf,
bd211b8556ef6b18ebf137419bd5555d65271664semery INET6_ADDRSTRLEN);
ae5b046d8f8cec187d40041c4b74b43f561d5ac7semery len = size;
ae5b046d8f8cec187d40041c4b74b43f561d5ac7semery (void) printf("%s\n", nbuf);
bd211b8556ef6b18ebf137419bd5555d65271664semery } else if (type == T_PTR) {
bd211b8556ef6b18ebf137419bd5555d65271664semery len = dn_expand(answer, end, ansp, name, hostlen);
bd211b8556ef6b18ebf137419bd5555d65271664semery if (len < 0) {
bd211b8556ef6b18ebf137419bd5555d65271664semery res_ndestroy(&stat);
bd211b8556ef6b18ebf137419bd5555d65271664semery exit(1);
bd211b8556ef6b18ebf137419bd5555d65271664semery }
bd211b8556ef6b18ebf137419bd5555d65271664semery }
1fceb383a3f0b59711832b9dc4e8329d7f216604semery ansp += len;
bd211b8556ef6b18ebf137419bd5555d65271664semery if (type == rr_type && class == C_IN) {
1fceb383a3f0b59711832b9dc4e8329d7f216604semery found = 1;
ae5b046d8f8cec187d40041c4b74b43f561d5ac7semery if (type != T_SRV && !(typestr && *typestr == 'I'))
bd211b8556ef6b18ebf137419bd5555d65271664semery break;
1fceb383a3f0b59711832b9dc4e8329d7f216604semery }
1fceb383a3f0b59711832b9dc4e8329d7f216604semery }
1fceb383a3f0b59711832b9dc4e8329d7f216604semery
bd211b8556ef6b18ebf137419bd5555d65271664semery if (found != 1) {
bd211b8556ef6b18ebf137419bd5555d65271664semery res_ndestroy(&stat);
1fceb383a3f0b59711832b9dc4e8329d7f216604semery exit(1);
bd211b8556ef6b18ebf137419bd5555d65271664semery }
1fceb383a3f0b59711832b9dc4e8329d7f216604semery
bd211b8556ef6b18ebf137419bd5555d65271664semery for (cp = name; *cp; cp++) {
1fceb383a3f0b59711832b9dc4e8329d7f216604semery *cp = tolower(*cp);
1fceb383a3f0b59711832b9dc4e8329d7f216604semery }
1fceb383a3f0b59711832b9dc4e8329d7f216604semery
ae5b046d8f8cec187d40041c4b74b43f561d5ac7semery if (type != T_SRV && !(typestr && *typestr == 'I'))
bd211b8556ef6b18ebf137419bd5555d65271664semery (void) printf("%s\n", name);
bd211b8556ef6b18ebf137419bd5555d65271664semery
bd211b8556ef6b18ebf137419bd5555d65271664semery res_ndestroy(&stat);
1fceb383a3f0b59711832b9dc4e8329d7f216604semery
1fceb383a3f0b59711832b9dc4e8329d7f216604semery return (0);
1fceb383a3f0b59711832b9dc4e8329d7f216604semery}