3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
28 /* All Rights Reserved */
29
30 /*
31 * University Copyright- Copyright (c) 1982, 1986, 1988
32 * The Regents of the University of California
33 * All Rights Reserved
34 *
35 * University Acknowledgment- Portions of this document are derived from
36 * software developed by the University of California, Berkeley, and its
37 * contributors.
38 */
39
40 #pragma ident "%Z%%M% %I% %E% SMI"
41
42 #include <sys/param.h>
43 #include <sys/socket.h>
44 #include <netinet/in.h>
45 #include <ctype.h>
46 #include <netdb.h>
47 #include <stdio.h>
48 #include <errno.h>
49 #include <string.h>
50 #include <arpa/inet.h>
51 #include <arpa/nameser.h>
52 #include <resolv.h>
53
54 #if PACKETSZ > 1024
55 #define MAXPACKET PACKETSZ
56 #else
57 #define MAXPACKET 1024
58 #endif
59
60 int h_errno;
61
62 /*
63 * Formulate a normal query, send, and await answer.
64 * Returned answer is placed in supplied buffer "answer".
65 * Perform preliminary check of answer, returning success only
66 * if no error is indicated and the answer count is nonzero.
67 * Return the size of the response on success, -1 on error.
68 * Error number is left in h_errno.
69 * Caller must parse answer and determine whether it answers the question.
70 */
71 int
72 res_query(name, class, type, answer, anslen)
79 HEADER *hp;
80 int n;
81
82 if ((_res.options & RES_INIT) == 0 && res_init() == -1)
83 return (-1);
84 #ifdef DEBUG
85 if (_res.options & RES_DEBUG)
86 printf("res_query(%s, %d, %d)\n", name, class, type);
87 #endif
88 n = res_mkquery(QUERY, name, class, type, (char *)NULL, 0, NULL,
89 buf, sizeof (buf));
90
91 if (n <= 0) {
92 #ifdef DEBUG
93 if (_res.options & RES_DEBUG)
94 printf("res_query: mkquery failed\n");
95 #endif
96 h_errno = NO_RECOVERY;
97 return (n);
98 }
99 n = res_send(buf, n, answer, anslen);
100 if (n < 0) {
101 #ifdef DEBUG
102 if (_res.options & RES_DEBUG)
103 printf("res_query: send error\n");
104 #endif
105 h_errno = TRY_AGAIN;
106 return (n);
107 }
108
109 hp = (HEADER *) answer;
110 if (hp->rcode != NOERROR || ntohs(hp->ancount) == 0) {
111 #ifdef DEBUG
112 if (_res.options & RES_DEBUG)
113 printf("rcode = %d, ancount=%d\n", hp->rcode,
114 ntohs(hp->ancount));
115 #endif
116 switch (hp->rcode) {
117 case NXDOMAIN:
118 h_errno = HOST_NOT_FOUND;
119 break;
254 memcpy((void *)nbuf, (void *)name, n);
255 #else
256 bcopy(name, nbuf, n);
257 #endif
258 nbuf[n] = '\0';
259 } else
260 longname = name;
261 } else
262 (void) sprintf(nbuf, "%.*s.%.*s",
263 MAXDNAME, name, MAXDNAME, domain);
264
265 return (res_query(longname, class, type, answer, anslen));
266 }
267
268 char *
269 hostalias(name)
270 register char *name;
271 {
272 register char *C1, *C2;
273 FILE *fp;
274 char *file, *getenv(), *strcpy(), *strncpy();
275 char buf[BUFSIZ];
276 static char abuf[MAXDNAME];
277
278 file = getenv("HOSTALIASES");
279 if (file == NULL || (fp = fopen(file, "r")) == NULL)
280 return (NULL);
281 buf[sizeof (buf) - 1] = '\0';
282 while (fgets(buf, sizeof (buf), fp)) {
283 for (C1 = buf; *C1 && !isspace(*C1); ++C1);
284 if (!*C1)
285 break;
286 *C1 = '\0';
287 if (!strcasecmp(buf, name)) {
288 while (isspace(*++C1));
289 if (!*C1)
290 break;
291 for (C2 = C1 + 1; *C2 && !isspace(*C2); ++C2);
292 abuf[sizeof (abuf) - 1] = *C2 = '\0';
293 (void) strncpy(abuf, C1, sizeof (abuf) - 1);
294 fclose(fp);
|
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2015 Gary Mills
24 * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
25 * Use is subject to license terms.
26 */
27
28 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
29 /* All Rights Reserved */
30
31 /*
32 * University Copyright- Copyright (c) 1982, 1986, 1988
33 * The Regents of the University of California
34 * All Rights Reserved
35 *
36 * University Acknowledgment- Portions of this document are derived from
37 * software developed by the University of California, Berkeley, and its
38 * contributors.
39 */
40
41 #include <sys/param.h>
42 #include <sys/socket.h>
43 #include <netinet/in.h>
44 #include <ctype.h>
45 #include <netdb.h>
46 #include <stdio.h>
47 #include <errno.h>
48 #include <string.h>
49 #include <stdlib.h>
50 #include <arpa/inet.h>
51 #include <arpa/nameser.h>
52 #include <resolv.h>
53 #include "crossl.h"
54
55 #if PACKETSZ > 1024
56 #define MAXPACKET PACKETSZ
57 #else
58 #define MAXPACKET 1024
59 #endif
60
61 int h_errno;
62
63 /*
64 * Formulate a normal query, send, and await answer.
65 * Returned answer is placed in supplied buffer "answer".
66 * Perform preliminary check of answer, returning success only
67 * if no error is indicated and the answer count is nonzero.
68 * Return the size of the response on success, -1 on error.
69 * Error number is left in h_errno.
70 * Caller must parse answer and determine whether it answers the question.
71 */
72 int
73 res_query(name, class, type, answer, anslen)
80 HEADER *hp;
81 int n;
82
83 if ((_res.options & RES_INIT) == 0 && res_init() == -1)
84 return (-1);
85 #ifdef DEBUG
86 if (_res.options & RES_DEBUG)
87 printf("res_query(%s, %d, %d)\n", name, class, type);
88 #endif
89 n = res_mkquery(QUERY, name, class, type, (char *)NULL, 0, NULL,
90 buf, sizeof (buf));
91
92 if (n <= 0) {
93 #ifdef DEBUG
94 if (_res.options & RES_DEBUG)
95 printf("res_query: mkquery failed\n");
96 #endif
97 h_errno = NO_RECOVERY;
98 return (n);
99 }
100 n = res_send(buf, n, (char *)answer, anslen);
101 if (n < 0) {
102 #ifdef DEBUG
103 if (_res.options & RES_DEBUG)
104 printf("res_query: send error\n");
105 #endif
106 h_errno = TRY_AGAIN;
107 return (n);
108 }
109
110 hp = (HEADER *) answer;
111 if (hp->rcode != NOERROR || ntohs(hp->ancount) == 0) {
112 #ifdef DEBUG
113 if (_res.options & RES_DEBUG)
114 printf("rcode = %d, ancount=%d\n", hp->rcode,
115 ntohs(hp->ancount));
116 #endif
117 switch (hp->rcode) {
118 case NXDOMAIN:
119 h_errno = HOST_NOT_FOUND;
120 break;
255 memcpy((void *)nbuf, (void *)name, n);
256 #else
257 bcopy(name, nbuf, n);
258 #endif
259 nbuf[n] = '\0';
260 } else
261 longname = name;
262 } else
263 (void) sprintf(nbuf, "%.*s.%.*s",
264 MAXDNAME, name, MAXDNAME, domain);
265
266 return (res_query(longname, class, type, answer, anslen));
267 }
268
269 char *
270 hostalias(name)
271 register char *name;
272 {
273 register char *C1, *C2;
274 FILE *fp;
275 char *file;
276 char buf[BUFSIZ];
277 static char abuf[MAXDNAME];
278
279 file = getenv("HOSTALIASES");
280 if (file == NULL || (fp = fopen(file, "r")) == NULL)
281 return (NULL);
282 buf[sizeof (buf) - 1] = '\0';
283 while (fgets(buf, sizeof (buf), fp)) {
284 for (C1 = buf; *C1 && !isspace(*C1); ++C1);
285 if (!*C1)
286 break;
287 *C1 = '\0';
288 if (!strcasecmp(buf, name)) {
289 while (isspace(*++C1));
290 if (!*C1)
291 break;
292 for (C2 = C1 + 1; *C2 && !isspace(*C2); ++C2);
293 abuf[sizeof (abuf) - 1] = *C2 = '\0';
294 (void) strncpy(abuf, C1, sizeof (abuf) - 1);
295 fclose(fp);
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