diff options
Diffstat (limited to 'contrib/isc-dhcp/minires/res_mkquery.c')
| -rw-r--r-- | contrib/isc-dhcp/minires/res_mkquery.c | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/contrib/isc-dhcp/minires/res_mkquery.c b/contrib/isc-dhcp/minires/res_mkquery.c new file mode 100644 index 000000000000..88fe7e6a1ef6 --- /dev/null +++ b/contrib/isc-dhcp/minires/res_mkquery.c @@ -0,0 +1,193 @@ +/* + * 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. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. 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) 1996-1999 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 INTERNET SOFTWARE CONSORTIUM DISCLAIMS + * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE + * CONSORTIUM 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. + */ + +#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 1.4 2001/01/16 22:33:14 mellon 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; +} |