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