Update.
[glibc.git] / resolv / res_mkquery.c
blob05b94bd79ea3ff49569fd34b3573b2543032f5bb
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 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
31 * Portions Copyright (c) 1993 by Digital Equipment Corporation.
33 * Permission to use, copy, modify, and distribute this software for any
34 * purpose with or without fee is hereby granted, provided that the above
35 * copyright notice and this permission notice appear in all copies, and that
36 * the name of Digital Equipment Corporation not be used in advertising or
37 * publicity pertaining to distribution of the document or software without
38 * specific, written prior permission.
40 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
41 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
42 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
43 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
44 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
45 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
46 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
47 * SOFTWARE.
51 * Portions Copyright (c) 1996-1999 by Internet Software Consortium.
53 * Permission to use, copy, modify, and distribute this software for any
54 * purpose with or without fee is hereby granted, provided that the above
55 * copyright notice and this permission notice appear in all copies.
57 * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
58 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
59 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
60 * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
61 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
62 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
63 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
64 * SOFTWARE.
67 #if defined(LIBC_SCCS) && !defined(lint)
68 static const char sccsid[] = "@(#)res_mkquery.c 8.1 (Berkeley) 6/4/93";
69 static const char rcsid[] = "$BINDId: res_mkquery.c,v 8.12 1999/10/13 16:39:40 vixie Exp $";
70 #endif /* LIBC_SCCS and not lint */
72 #include <sys/types.h>
73 #include <sys/param.h>
74 #include <netinet/in.h>
75 #include <arpa/nameser.h>
76 #include <netdb.h>
77 #include <resolv.h>
78 #include <stdio.h>
79 #include <string.h>
81 /* Options. Leave them on. */
82 /* #define DEBUG */
84 extern const char *_res_opcodes[];
87 * Form all types of queries.
88 * Returns the size of the result or -1.
90 int
91 res_nmkquery(res_state statp,
92 int op, /* opcode of query */
93 const char *dname, /* domain name */
94 int class, int type, /* class and type of query */
95 const u_char *data, /* resource record data */
96 int datalen, /* length of data */
97 const u_char *newrr_in, /* new rr for modify or append */
98 u_char *buf, /* buffer to put query */
99 int buflen) /* size of buffer */
101 register HEADER *hp;
102 register u_char *cp;
103 register int n;
104 u_char *dnptrs[20], **dpp, **lastdnptr;
106 #ifdef DEBUG
107 if (statp->options & RES_DEBUG)
108 printf(";; res_nmkquery(%s, %s, %s, %s)\n",
109 _res_opcodes[op], dname, p_class(class), p_type(type));
110 #endif
112 * Initialize header fields.
114 if ((buf == NULL) || (buflen < HFIXEDSZ))
115 return (-1);
116 memset(buf, 0, HFIXEDSZ);
117 hp = (HEADER *) buf;
118 hp->id = htons(++statp->id);
119 hp->opcode = op;
120 hp->rd = (statp->options & RES_RECURSE) != 0;
121 hp->rcode = NOERROR;
122 cp = buf + HFIXEDSZ;
123 buflen -= HFIXEDSZ;
124 dpp = dnptrs;
125 *dpp++ = buf;
126 *dpp++ = NULL;
127 lastdnptr = dnptrs + sizeof dnptrs / sizeof dnptrs[0];
129 * perform opcode specific processing
131 switch (op) {
132 case QUERY: /*FALLTHROUGH*/
133 case NS_NOTIFY_OP:
134 if ((buflen -= QFIXEDSZ) < 0)
135 return (-1);
136 if ((n = dn_comp(dname, cp, buflen, dnptrs, lastdnptr)) < 0)
137 return (-1);
138 cp += n;
139 buflen -= n;
140 __putshort(type, cp);
141 cp += INT16SZ;
142 __putshort(class, cp);
143 cp += INT16SZ;
144 hp->qdcount = htons(1);
145 if (op == QUERY || data == NULL)
146 break;
148 * Make an additional record for completion domain.
150 buflen -= RRFIXEDSZ;
151 n = dn_comp((char *)data, cp, buflen, dnptrs, lastdnptr);
152 if (n < 0)
153 return (-1);
154 cp += n;
155 buflen -= n;
156 __putshort(T_NULL, cp);
157 cp += INT16SZ;
158 __putshort(class, cp);
159 cp += INT16SZ;
160 __putlong(0, cp);
161 cp += INT32SZ;
162 __putshort(0, cp);
163 cp += INT16SZ;
164 hp->arcount = htons(1);
165 break;
167 case IQUERY:
169 * Initialize answer section
171 if (buflen < 1 + RRFIXEDSZ + datalen)
172 return (-1);
173 *cp++ = '\0'; /* no domain name */
174 __putshort(type, cp);
175 cp += INT16SZ;
176 __putshort(class, cp);
177 cp += INT16SZ;
178 __putlong(0, cp);
179 cp += INT32SZ;
180 __putshort(datalen, cp);
181 cp += INT16SZ;
182 if (datalen) {
183 memcpy(cp, data, datalen);
184 cp += datalen;
186 hp->ancount = htons(1);
187 break;
189 default:
190 return (-1);
192 return (cp - buf);