source: rtems/cpukit/libnetworking/libc/res_mkquery.c @ 33679ec4

4.104.114.84.95
Last change on this file since 33679ec4 was 39e6e65a, checked in by Joel Sherrill <joel.sherrill@…>, on 08/19/98 at 21:32:28

Base files

  • Property mode set to 100644
File size: 6.6 KB
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1/*
2 * Copyright (c) 1985, 1993
3 *    The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *      This product includes software developed by the University of
16 *      California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34/*
35 * Portions Copyright (c) 1993 by Digital Equipment Corporation.
36 *
37 * Permission to use, copy, modify, and distribute this software for any
38 * purpose with or without fee is hereby granted, provided that the above
39 * copyright notice and this permission notice appear in all copies, and that
40 * the name of Digital Equipment Corporation not be used in advertising or
41 * publicity pertaining to distribution of the document or software without
42 * specific, written prior permission.
43 *
44 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
45 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
46 * OF MERCHANTABILITY AND FITNESS.   IN NO EVENT SHALL DIGITAL EQUIPMENT
47 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
48 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
49 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
50 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
51 * SOFTWARE.
52 */
53
54/*
55 * Portions Copyright (c) 1996 by Internet Software Consortium.
56 *
57 * Permission to use, copy, modify, and distribute this software for any
58 * purpose with or without fee is hereby granted, provided that the above
59 * copyright notice and this permission notice appear in all copies.
60 *
61 * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
62 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
63 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
64 * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
65 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
66 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
67 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
68 * SOFTWARE.
69 */
70
71#if defined(LIBC_SCCS) && !defined(lint)
72static char sccsid[] = "@(#)res_mkquery.c       8.1 (Berkeley) 6/4/93";
73static char orig_rcsid[] = "From: Id: res_mkquery.c,v 8.9 1997/04/24 22:22:36 vixie Exp $";
74static char rcsid[] = "$Id$";
75#endif /* LIBC_SCCS and not lint */
76
77#include <sys/types.h>
78#include <sys/param.h>
79#include <netinet/in.h>
80#include <arpa/nameser.h>
81#include <netdb.h>
82#include <resolv.h>
83#include <stdio.h>
84#include <string.h>
85
86#include "res_config.h"
87
88/*
89 * Form all types of queries.
90 * Returns the size of the result or -1.
91 */
92int
93res_mkquery(op, dname, class, type, data, datalen, newrr_in, buf, buflen)
94        int op;                 /* opcode of query */
95        const char *dname;      /* domain name */
96        int class, type;        /* class and type of query */
97        const u_char *data;     /* resource record data */
98        int datalen;            /* length of data */
99        const u_char *newrr_in; /* new rr for modify or append */
100        u_char *buf;            /* buffer to put query */
101        int buflen;             /* size of buffer */
102{
103        register HEADER *hp;
104        register u_char *cp;
105        register int n;
106        u_char *dnptrs[20], **dpp, **lastdnptr;
107
108        if ((_res.options & RES_INIT) == 0 && res_init() == -1) {
109                h_errno = NETDB_INTERNAL;
110                return (-1);
111        }
112#ifdef DEBUG
113        if (_res.options & RES_DEBUG)
114                printf(";; res_mkquery(%d, %s, %d, %d)\n",
115                       op, dname, class, type);
116#endif
117        /*
118         * Initialize header fields.
119         */
120        if ((buf == NULL) || (buflen < HFIXEDSZ))
121                return (-1);
122        memset(buf, 0, HFIXEDSZ);
123        hp = (HEADER *) buf;
124        hp->id = htons(++_res.id);
125        hp->opcode = op;
126        hp->rd = (_res.options & RES_RECURSE) != 0;
127        hp->rcode = NOERROR;
128        cp = buf + HFIXEDSZ;
129        buflen -= HFIXEDSZ;
130        dpp = dnptrs;
131        *dpp++ = buf;
132        *dpp++ = NULL;
133        lastdnptr = dnptrs + sizeof dnptrs / sizeof dnptrs[0];
134        /*
135         * perform opcode specific processing
136         */
137        switch (op) {
138        case QUERY:     /*FALLTHROUGH*/
139        case NS_NOTIFY_OP:
140                if ((buflen -= QFIXEDSZ) < 0)
141                        return (-1);
142                if ((n = dn_comp(dname, cp, buflen, dnptrs, lastdnptr)) < 0)
143                        return (-1);
144                cp += n;
145                buflen -= n;
146                __putshort(type, cp);
147                cp += INT16SZ;
148                __putshort(class, cp);
149                cp += INT16SZ;
150                hp->qdcount = htons(1);
151                if (op == QUERY || data == NULL)
152                        break;
153                /*
154                 * Make an additional record for completion domain.
155                 */
156                buflen -= RRFIXEDSZ;
157                n = dn_comp((char *)data, cp, buflen, dnptrs, lastdnptr);
158                if (n < 0)
159                        return (-1);
160                cp += n;
161                buflen -= n;
162                __putshort(T_NULL, cp);
163                cp += INT16SZ;
164                __putshort(class, cp);
165                cp += INT16SZ;
166                __putlong(0, cp);
167                cp += INT32SZ;
168                __putshort(0, cp);
169                cp += INT16SZ;
170                hp->arcount = htons(1);
171                break;
172
173        case IQUERY:
174                /*
175                 * Initialize answer section
176                 */
177                if (buflen < 1 + RRFIXEDSZ + datalen)
178                        return (-1);
179                *cp++ = '\0';   /* no domain name */
180                __putshort(type, cp);
181                cp += INT16SZ;
182                __putshort(class, cp);
183                cp += INT16SZ;
184                __putlong(0, cp);
185                cp += INT32SZ;
186                __putshort(datalen, cp);
187                cp += INT16SZ;
188                if (datalen) {
189                        memcpy(cp, data, datalen);
190                        cp += datalen;
191                }
192                hp->ancount = htons(1);
193                break;
194
195        default:
196                return (-1);
197        }
198        return (cp - buf);
199}
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