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- /*
- * $Id: build_dns.c,v 1.1.1.1 1999/05/18 15:33:42 dugsong Exp $
- *
- * libnet
- * build_dns.c - DNS packet assembler
- *
- * Copyright (c) 1998, 1999 Mike D. Schiffman <mike@infonexus.com>
- * route|daemon9 <route@infonexus.com>
- * 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.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
- *
- */
-
- #if (HAVE_CONFIG_H)
- #include "../include/config.h"
- #endif
- #include "../include/libnet.h"
-
- void
- build_dns(u_short id, u_short flags, u_short num_q, u_short num_anws_rr,
- u_short num_auth_rr, u_short num_addi_rr, const u_char *payload,
- int payload_s, u_char *buf)
- {
- struct libnet_dns_hdr dns_hdr;
-
- assert(buf);
-
- dns_hdr.id = htons(id);
- dns_hdr.flags = htons(flags);
- dns_hdr.num_q = htons(num_q);
- dns_hdr.num_answ_rr = htons(num_anws_rr);
- dns_hdr.num_auth_rr = htons(num_auth_rr);
- dns_hdr.num_addi_rr = htons(num_addi_rr);
-
- if (payload && payload_s)
- {
- /*
- * Unchecked runtime error for buf + DNS_H + payload to be greater
- * than the allocated heap memory.
- */
- memcpy(buf + DNS_H, payload, payload_s);
- }
- memcpy(buf, &dns_hdr, sizeof(dns_hdr));
- }
-
-
- /* EOF */
-