1 /*
2 * Copyright (c) 1985, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Portions copyright (c) 1999, 2000
6 * Intel Corporation.
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 *
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 *
20 * 3. All advertising materials mentioning features or use of this software
21 * must display the following acknowledgement:
22 *
23 * This product includes software developed by the University of
24 * California, Berkeley, Intel Corporation, and its contributors.
25 *
26 * 4. Neither the name of University, Intel Corporation, or their respective
27 * contributors may be used to endorse or promote products derived from
28 * this software without specific prior written permission.
29 *
30 * THIS SOFTWARE IS PROVIDED BY THE REGENTS, INTEL CORPORATION AND
31 * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
32 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
33 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS,
34 * INTEL CORPORATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
35 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
36 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
37 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
38 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
39 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
40 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
41 *
42 */
43
44 /*
45 * Portions Copyright (c) 1993 by Digital Equipment Corporation.
46 *
47 * Permission to use, copy, modify, and distribute this software for any
48 * purpose with or without fee is hereby granted, provided that the above
49 * copyright notice and this permission notice appear in all copies, and that
50 * the name of Digital Equipment Corporation not be used in advertising or
51 * publicity pertaining to distribution of the document or software without
52 * specific, written prior permission.
53 *
54 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
55 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
56 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
57 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
58 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
59 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
60 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
61 * SOFTWARE.
62 */
63
64 /*
65 * Portions Copyright (c) 1996 by Internet Software Consortium.
66 *
67 * Permission to use, copy, modify, and distribute this software for any
68 * purpose with or without fee is hereby granted, provided that the above
69 * copyright notice and this permission notice appear in all copies.
70 *
71 * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
72 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
73 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
74 * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
75 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
76 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
77 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
78 * SOFTWARE.
79 */
80
81 #if defined(LIBC_SCCS) && !defined(lint)
82 static char sccsid[] = "@(#)res_mkquery.c 8.1 (Berkeley) 6/4/93";
83 static char orig_rcsid[] = "From: Id: res_mkquery.c,v 8.9 1997/04/24 22:22:36 vixie Exp $";
84 static char rcsid[] = "$Id: res_mkquery.c,v 1.1.1.1 2003/11/19 01:51:37 kyu3 Exp $";
85 #endif /* LIBC_SCCS and not lint */
86
87 #include <sys/types.h>
88 #include <sys/param.h>
89 #include <netinet/in.h>
90 #include <arpa/nameser.h>
91 #include <netdb.h>
92 #include <resolv.h>
93 #include <stdio.h>
94 #include <string.h>
95
96 #include "res_config.h"
97
98 /*
99 * Form all types of queries.
100 * Returns the size of the result or -1.
101 */
102 int
res_mkquery(int op,const char * dname,int class,int type,const u_char * data,int datalen,const u_char * newrr_in,u_char * buf,int buflen)103 res_mkquery(
104 int op, /* opcode of query */
105 const char *dname, /* domain name */
106 int class, /* class of query */
107 int type, /* type of query */
108 const u_char *data, /* resource record data */
109 int datalen, /* length of data */
110 const u_char *newrr_in, /* new rr for modify or append */
111 u_char *buf, /* buffer to put query */
112 int buflen /* size of buffer */
113 )
114 {
115 register HEADER *hp;
116 register u_char *cp;
117 register int n;
118 u_char *dnptrs[20], **dpp, **lastdnptr;
119
120 if ((_res.options & RES_INIT) == 0 && res_init() == -1) {
121 h_errno = NETDB_INTERNAL;
122 return (-1);
123 }
124 #ifdef DEBUG
125 if (_res.options & RES_DEBUG)
126 printf(";; res_mkquery(%d, %s, %d, %d)\n",
127 op, dname, class, type);
128 #endif
129 /*
130 * Initialize header fields.
131 */
132 if ((buf == NULL) || (buflen < HFIXEDSZ))
133 return (-1);
134 memset(buf, 0, HFIXEDSZ);
135 hp = (HEADER *) buf;
136 hp->id = htons(++_res.id);
137 hp->opcode = op;
138 hp->rd = (_res.options & RES_RECURSE) != 0;
139 hp->rcode = NOERROR;
140 cp = buf + HFIXEDSZ;
141 buflen -= HFIXEDSZ;
142 dpp = dnptrs;
143 *dpp++ = buf;
144 *dpp++ = NULL;
145 lastdnptr = dnptrs + sizeof dnptrs / sizeof dnptrs[0];
146 /*
147 * perform opcode specific processing
148 */
149 switch (op) {
150 case QUERY: /*FALLTHROUGH*/
151 case NS_NOTIFY_OP:
152 if ((buflen -= QFIXEDSZ) < 0)
153 return (-1);
154 if ((n = dn_comp(dname, cp, buflen, dnptrs, lastdnptr)) < 0)
155 return (-1);
156 cp += n;
157 buflen -= n;
158 __putshort((u_int16_t)type, cp);
159 cp += INT16SZ;
160 __putshort((u_int16_t)class, cp);
161 cp += INT16SZ;
162 hp->qdcount = htons(1);
163 if (op == QUERY || data == NULL)
164 break;
165 /*
166 * Make an additional record for completion domain.
167 */
168 buflen -= RRFIXEDSZ;
169 n = dn_comp((char *)data, cp, buflen, dnptrs, lastdnptr);
170 if (n < 0)
171 return (-1);
172 cp += n;
173 buflen -= n;
174 __putshort(T_NULL, cp);
175 cp += INT16SZ;
176 __putshort((u_int16_t)class, cp);
177 cp += INT16SZ;
178 __putlong(0, cp);
179 cp += INT32SZ;
180 __putshort(0, cp);
181 cp += INT16SZ;
182 hp->arcount = htons(1);
183 break;
184
185 case IQUERY:
186 /*
187 * Initialize answer section
188 */
189 if (buflen < 1 + RRFIXEDSZ + datalen)
190 return (-1);
191 *cp++ = '\0'; /* no domain name */
192 __putshort((u_int16_t)type, cp);
193 cp += INT16SZ;
194 __putshort((u_int16_t)class, cp);
195 cp += INT16SZ;
196 __putlong(0, cp);
197 cp += INT32SZ;
198 __putshort((u_int16_t)datalen, cp);
199 cp += INT16SZ;
200 if (datalen) {
201 memcpy(cp, data, datalen);
202 cp += datalen;
203 }
204 hp->ancount = htons(1);
205 break;
206
207 default:
208 return (-1);
209 }
210 return ((int)(cp - buf));
211 }
212