NetBSD-5.0.2/dist/dhcp/minires/res_mkquery.c
/*
* Copyright (c) 1985, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* Portions Copyright (c) 1993 by Digital Equipment Corporation.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies, and that
* the name of Digital Equipment Corporation not be used in advertising or
* publicity pertaining to distribution of the document or software without
* specific, written prior permission.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
* WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
* CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
* SOFTWARE.
*/
/*
* Portions Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
* Portions Copyright (c) 1996-2003 by Internet Software Consortium
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
* OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Internet Systems Consortium, Inc.
* 950 Charter Street
* Redwood City, CA 94063
* <info@isc.org>
* http://www.isc.org/
*/
#if defined(LIBC_SCCS) && !defined(lint)
static const char sccsid[] = "@(#)res_mkquery.c 8.1 (Berkeley) 6/4/93";
static const char rcsid[] = "$Id: res_mkquery.c,v 1.3 2005/08/11 17:13:26 drochner Exp $";
#endif /* LIBC_SCCS and not lint */
#include <sys/types.h>
#include <sys/param.h>
#include <netinet/in.h>
#include <netdb.h>
#include <stdio.h>
#include <string.h>
#include <sys/socket.h>
#include "minires/minires.h"
#include "arpa/nameser.h"
extern const char *_res_opcodes[];
/*
* Form all types of queries.
* Returns the size of the result or -1.
*/
isc_result_t
res_nmkquery(res_state statp,
int op, /* opcode of query */
const char *dname, /* domain name */
ns_class class, ns_type type, /* class and type of query */
const u_char *data, /* resource record data */
unsigned datalen, /* length of data */
const u_char *newrr_in, /* new rr for modify or append */
double *buf, /* buffer to put query */
unsigned buflen, /* size of buffer */
unsigned *rbuflen) /* returned size of buffer */
{
register HEADER *hp;
register u_char *cp;
register int n;
u_char *dnptrs[20], **dpp, **lastdnptr;
/*
* Initialize header fields.
*/
if ((buf == NULL) || (buflen < HFIXEDSZ))
return ISC_R_INVALIDARG;
memset(buf, 0, HFIXEDSZ);
hp = (HEADER *) buf;
hp->id = htons(++statp->id);
hp->opcode = op;
hp->rd = (statp->options & RES_RECURSE) != 0;
hp->rcode = NOERROR;
cp = ((u_char *)buf) + HFIXEDSZ;
buflen -= HFIXEDSZ;
dpp = dnptrs;
*dpp++ = (u_char *)buf;
*dpp++ = NULL;
lastdnptr = dnptrs + sizeof dnptrs / sizeof dnptrs[0];
/*
* perform opcode specific processing
*/
switch (op) {
case QUERY: /*FALLTHROUGH*/
case NS_NOTIFY_OP:
if ((buflen -= QFIXEDSZ) < 0)
return ISC_R_NOSPACE;
if ((n = dn_comp(dname, cp, buflen, dnptrs, lastdnptr)) < 0)
return ISC_R_NOSPACE;
cp += n;
buflen -= n;
putUShort(cp, type);
cp += INT16SZ;
putUShort(cp, class);
cp += INT16SZ;
hp->qdcount = htons(1);
if (op == QUERY || data == NULL)
break;
/*
* Make an additional record for completion domain.
*/
buflen -= RRFIXEDSZ;
n = dn_comp((const char *)data, cp, buflen, dnptrs, lastdnptr);
if (n < 0)
return ISC_R_NOSPACE;
cp += n;
buflen -= n;
putUShort(cp, T_NULL);
cp += INT16SZ;
putUShort(cp, class);
cp += INT16SZ;
putULong(cp, 0);
cp += INT32SZ;
putUShort(cp, 0);
cp += INT16SZ;
hp->arcount = htons(1);
break;
case IQUERY:
/*
* Initialize answer section
*/
if (buflen < 1 + RRFIXEDSZ + datalen)
return ISC_R_NOSPACE;
*cp++ = '\0'; /* no domain name */
putUShort(cp, type);
cp += INT16SZ;
putUShort(cp, class);
cp += INT16SZ;
putULong(cp, 0);
cp += INT32SZ;
putUShort(cp, datalen);
cp += INT16SZ;
if (datalen) {
memcpy(cp, data, datalen);
cp += datalen;
}
hp->ancount = htons(1);
break;
default:
return ISC_R_NOTIMPLEMENTED;
}
*rbuflen = cp - ((u_char *)buf);
return ISC_R_SUCCESS;
}