epan/dissectors/packet-dns.h

   1 /* packet-dns.h
   2  * Definitions for packet disassembly structures and routines used both by
   3  * DNS and NBNS.
   4  *
   5  * Wireshark - Network traffic analyzer
   6  * By Gerald Combs <gerald@wireshark.org>
   7  * Copyright 1998 Gerald Combs
   8  *
   9  * SPDX-License-Identifier: GPL-2.0-or-later
  10  */
  11
  12
  13 #ifndef __PACKET_DNS_H__
  14 #define __PACKET_DNS_H__
  15
  16 extern const value_string dns_classes[];
  17
  18 /*
  19  * Expands DNS name from TVB into a byte string.
  20  *
  21  * Returns int: byte size of DNS data.
  22  * Returns char *name: a dot (.) separated raw string of DNS domain name labels.
  23  * This string is null terminated. Labels are copied directly from raw packet
  24  * data without any validation for a string encoding. This is the callers responsibility.
  25  * Return int name_len: byte length of "name".
  26  */
  27 int get_dns_name(tvbuff_t *tvb, int offset, int max_len, int dns_data_offset,
  28     const char **name, int* name_len);
  29
  30 #define MAX_DNAME_LEN   255             /* maximum domain name length */
  31
  32 #endif /* packet-dns.h */