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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [libnetworking/] [libc/] [res_mkquery.c] - Blame information for rev 173

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1 30 unneback
/*
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 * Copyright (c) 1985, 1993
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 *    The Regents of the University of California.  All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 * 3. All advertising materials mentioning features or use of this software
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 *    must display the following acknowledgement:
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 *      This product includes software developed by the University of
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 *      California, Berkeley and its contributors.
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 * 4. Neither the name of the University nor the names of its contributors
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 *    may be used to endorse or promote products derived from this software
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 *    without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 */
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/*
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 * Portions Copyright (c) 1993 by Digital Equipment Corporation.
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 *
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 * Permission to use, copy, modify, and distribute this software for any
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 * purpose with or without fee is hereby granted, provided that the above
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 * copyright notice and this permission notice appear in all copies, and that
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 * the name of Digital Equipment Corporation not be used in advertising or
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 * publicity pertaining to distribution of the document or software without
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 * specific, written prior permission.
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 *
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 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
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 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS.   IN NO EVENT SHALL DIGITAL EQUIPMENT
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 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
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 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
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 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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 * SOFTWARE.
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 */
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/*
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 * Portions Copyright (c) 1996 by Internet Software Consortium.
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 *
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 * Permission to use, copy, modify, and distribute this software for any
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 * purpose with or without fee is hereby granted, provided that the above
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 * copyright notice and this permission notice appear in all copies.
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 *
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 * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
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 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
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 * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
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 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
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 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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 * SOFTWARE.
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 */
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#if defined(LIBC_SCCS) && !defined(lint)
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static char sccsid[] = "@(#)res_mkquery.c       8.1 (Berkeley) 6/4/93";
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static char orig_rcsid[] = "From: Id: res_mkquery.c,v 8.9 1997/04/24 22:22:36 vixie Exp $";
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static char rcsid[] = "$Id: res_mkquery.c,v 1.2 2001-09-27 12:01:53 chris Exp $";
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#endif /* LIBC_SCCS and not lint */
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#include <sys/types.h>
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#include <sys/param.h>
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#include <netinet/in.h>
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#include <arpa/nameser.h>
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#include <netdb.h>
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#include <resolv.h>
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#include <stdio.h>
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#include <string.h>
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#include "res_config.h"
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/*
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 * Form all types of queries.
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 * Returns the size of the result or -1.
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 */
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int
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res_mkquery(op, dname, class, type, data, datalen, newrr_in, buf, buflen)
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        int op;                 /* opcode of query */
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        const char *dname;      /* domain name */
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        int class, type;        /* class and type of query */
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        const u_char *data;     /* resource record data */
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        int datalen;            /* length of data */
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        const u_char *newrr_in; /* new rr for modify or append */
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        u_char *buf;            /* buffer to put query */
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        int buflen;             /* size of buffer */
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{
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        register HEADER *hp;
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        register u_char *cp;
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        register int n;
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        u_char *dnptrs[20], **dpp, **lastdnptr;
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        if ((_res.options & RES_INIT) == 0 && res_init() == -1) {
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                h_errno = NETDB_INTERNAL;
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                return (-1);
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        }
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#ifdef DEBUG
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        if (_res.options & RES_DEBUG)
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                printf(";; res_mkquery(%d, %s, %d, %d)\n",
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                       op, dname, class, type);
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#endif
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        /*
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         * Initialize header fields.
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         */
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        if ((buf == NULL) || (buflen < HFIXEDSZ))
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                return (-1);
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        memset(buf, 0, HFIXEDSZ);
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        hp = (HEADER *) buf;
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        hp->id = htons(++_res.id);
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        hp->opcode = op;
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        hp->rd = (_res.options & RES_RECURSE) != 0;
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        hp->rcode = NOERROR;
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        cp = buf + HFIXEDSZ;
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        buflen -= HFIXEDSZ;
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        dpp = dnptrs;
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        *dpp++ = buf;
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        *dpp++ = NULL;
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        lastdnptr = dnptrs + sizeof dnptrs / sizeof dnptrs[0];
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        /*
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         * perform opcode specific processing
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         */
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        switch (op) {
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        case QUERY:     /*FALLTHROUGH*/
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        case NS_NOTIFY_OP:
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                if ((buflen -= QFIXEDSZ) < 0)
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                        return (-1);
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                if ((n = dn_comp(dname, cp, buflen, dnptrs, lastdnptr)) < 0)
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                        return (-1);
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                cp += n;
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                buflen -= n;
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                __putshort(type, cp);
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                cp += INT16SZ;
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                __putshort(class, cp);
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                cp += INT16SZ;
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                hp->qdcount = htons(1);
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                if (op == QUERY || data == NULL)
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                        break;
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                /*
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                 * Make an additional record for completion domain.
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                 */
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                buflen -= RRFIXEDSZ;
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                n = dn_comp((char *)data, cp, buflen, dnptrs, lastdnptr);
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                if (n < 0)
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                        return (-1);
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                cp += n;
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                buflen -= n;
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                __putshort(T_NULL, cp);
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                cp += INT16SZ;
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                __putshort(class, cp);
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                cp += INT16SZ;
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                __putlong(0, cp);
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                cp += INT32SZ;
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                __putshort(0, cp);
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                cp += INT16SZ;
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                hp->arcount = htons(1);
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                break;
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        case IQUERY:
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                /*
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                 * Initialize answer section
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                 */
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                if (buflen < 1 + RRFIXEDSZ + datalen)
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                        return (-1);
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                *cp++ = '\0';   /* no domain name */
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                __putshort(type, cp);
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                cp += INT16SZ;
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                __putshort(class, cp);
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                cp += INT16SZ;
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                __putlong(0, cp);
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                cp += INT32SZ;
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                __putshort(datalen, cp);
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                cp += INT16SZ;
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                if (datalen) {
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                        memcpy(cp, data, datalen);
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                        cp += datalen;
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                }
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                hp->ancount = htons(1);
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                break;
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        default:
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                return (-1);
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        }
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        return (cp - buf);
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}

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