1 /*
2 * collectd - src/utils_dns.h
3 * Copyright (C) 2006 Florian octo Forster
4 * Copyright (C) 2002 The Measurement Factory, Inc.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright notice,
13 * this list of conditions and the following disclaimer in the documentation
14 * and/or other materials provided with the distribution.
15 * 3. Neither the name of The Measurement Factory nor the names of its
16 * contributors may be used to endorse or promote products derived from this
17 * software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
20 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
23 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 *
31 * Authors:
32 * The Measurement Factory, Inc. <http://www.measurement-factory.com/>
33 * Florian octo Forster <octo at collectd.org>
34 */
36 #ifndef COLLECTD_UTILS_DNS_H
37 #define COLLECTD_UTILS_DNS_H 1
39 #include "config.h"
41 #include <arpa/nameser.h>
42 #include <stdint.h>
44 #if HAVE_PCAP_H
45 # include <pcap.h>
46 #endif
48 #define DNS_MSG_HDR_SZ 12
50 #define T_MAX 65536
51 #define MAX_QNAME_SZ 512
53 struct rfc1035_header_s {
54 uint16_t id;
55 unsigned int qr:1;
56 unsigned int opcode:4;
57 unsigned int aa:1;
58 unsigned int tc:1;
59 unsigned int rd:1;
60 unsigned int ra:1;
61 unsigned int z:1;
62 unsigned int ad:1;
63 unsigned int cd:1;
64 unsigned int rcode:4;
65 uint16_t qdcount;
66 uint16_t ancount;
67 uint16_t nscount;
68 uint16_t arcount;
69 uint16_t qtype;
70 uint16_t qclass;
71 char qname[MAX_QNAME_SZ];
72 uint16_t length;
73 };
74 typedef struct rfc1035_header_s rfc1035_header_t;
76 #if HAVE_PCAP_H
77 void dnstop_set_pcap_obj (pcap_t *po);
78 #endif
79 void dnstop_set_callback (void (*cb) (const rfc1035_header_t *));
81 void ignore_list_add_name (const char *name);
82 #if HAVE_PCAP_H
83 void handle_pcap (u_char * udata, const struct pcap_pkthdr *hdr, const u_char * pkt);
84 #endif
86 const char *qtype_str(int t);
87 const char *opcode_str(int o);
88 const char *rcode_str (int r);
90 #endif /* !COLLECTD_UTILS_DNS_H */