2 * ++Copyright++ 1985, 1993
4 * Copyright (c) 1985, 1993
5 * The Regents of the University of California. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed by the University of
18 * California, Berkeley and its contributors.
19 * 4. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * Portions Copyright (c) 1993 by Digital Equipment Corporation.
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.
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
56 #if defined(LIBC_SCCS) && !defined(lint)
57 static char sccsid[] = "@(#)res_mkquery.c 8.1 (Berkeley) 6/4/93";
58 static char rcsid[] = "$Id: res_mkquery.c,v 8.4 1996/08/05 08:31:35 vixie Exp $";
59 #endif /* LIBC_SCCS and not lint */
61 #include <sys/types.h>
62 #include <sys/param.h>
63 #include <netinet/in.h>
64 #include <arpa/nameser.h>
69 #if defined(BSD) && (BSD >= 199103)
72 # include "../conf/portability.h"
75 #if defined(USE_OPTIONS_H)
76 # include <../conf/options.h>
80 * Form all types of queries.
81 * Returns the size of the result or -1.
84 res_mkquery(op, dname, class, type, data, datalen, newrr_in, buf, buflen)
85 int op; /* opcode of query */
86 const char *dname; /* domain name */
87 int class, type; /* class and type of query */
88 const u_char *data; /* resource record data */
89 int datalen; /* length of data */
90 const u_char *newrr_in; /* new rr for modify or append */
91 u_char *buf; /* buffer to put query */
92 int buflen; /* size of buffer */
98 struct rrec *newrr = (struct rrec *) newrr_in;
100 u_char *dnptrs[20], **dpp, **lastdnptr;
102 if ((_res.options & RES_INIT) == 0 && res_init() == -1) {
103 h_errno = NETDB_INTERNAL;
107 if (_res.options & RES_DEBUG)
108 printf(";; res_mkquery(%d, %s, %d, %d)\n",
109 op, dname, class, type);
112 * Initialize header fields.
114 if ((buf == NULL) || (buflen < HFIXEDSZ))
116 bzero(buf, HFIXEDSZ);
118 hp->id = htons(++_res.id);
120 hp->rd = (_res.options & RES_RECURSE) != 0;
127 lastdnptr = dnptrs + sizeof dnptrs / sizeof dnptrs[0];
129 * perform opcode specific processing
132 case QUERY: /*FALLTHROUGH*/
134 if ((buflen -= QFIXEDSZ) < 0)
136 if ((n = dn_comp(dname, cp, buflen, dnptrs, lastdnptr)) < 0)
140 __putshort(type, cp);
142 __putshort(class, cp);
144 hp->qdcount = htons(1);
145 if (op == QUERY || data == NULL)
148 * Make an additional record for completion domain.
151 n = dn_comp((char *)data, cp, buflen, dnptrs, lastdnptr);
156 __putshort(T_NULL, cp);
158 __putshort(class, cp);
164 hp->arcount = htons(1);
169 * Initialize answer section
171 if (buflen < 1 + RRFIXEDSZ + datalen)
173 *cp++ = '\0'; /* no domain name */
174 __putshort(type, cp);
176 __putshort(class, cp);
180 __putshort(datalen, cp);
183 bcopy(data, cp, datalen);
186 hp->ancount = htons(1);
191 * For UPDATEM/UPDATEMA, do UPDATED/UPDATEDA followed by UPDATEA
192 * (Record to be modified is followed by its replacement in msg.)
199 * The res code for UPDATED and UPDATEDA is the same; user
200 * calls them differently: specifies data for UPDATED; server
201 * ignores data if specified for UPDATEDA.
204 buflen -= RRFIXEDSZ + datalen;
205 if ((n = dn_comp(dname, cp, buflen, dnptrs, lastdnptr)) < 0)
208 __putshort(type, cp);
210 __putshort(class, cp);
214 __putshort(datalen, cp);
217 bcopy(data, cp, datalen);
220 if ( (op == UPDATED) || (op == UPDATEDA) ) {
221 hp->ancount = htons(0);
224 /* Else UPDATEM/UPDATEMA, so drop into code for UPDATEA */
226 case UPDATEA: /* Add new resource record */
227 buflen -= RRFIXEDSZ + datalen;
228 if ((n = dn_comp(dname, cp, buflen, dnptrs, lastdnptr)) < 0)
231 __putshort(newrr->r_type, cp);
233 __putshort(newrr->r_class, cp);
237 __putshort(newrr->r_size, cp);
240 bcopy(newrr->r_data, cp, newrr->r_size);
243 hp->ancount = htons(0);
245 #endif /* ALLOW_UPDATES */