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/*
This file is part of GNUnet
(C) 2010, 2011, 2012 Christian Grothoff (and other contributing authors)
GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
by the Free Software Foundation; either version 2, or (at your
option) any later version.
GNUnet is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNUnet; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
/**
* @file include/gnunet_dnsparse_lib.h
* @brief API for helper library to parse DNS packets.
* @author Philipp Toelke
*/
#ifndef GNUNET_DNSPARSER_LIB_H
#define GNUNET_DNSPARSER_LIB_H
#include "platform.h"
#include "gnunet_common.h"
// DNS-Stuff
GNUNET_NETWORK_STRUCT_BEGIN
struct dns_static
{
uint16_t id GNUNET_PACKED;
unsigned rd:1 GNUNET_PACKED; // recursion desired (client -> server)
unsigned tc:1 GNUNET_PACKED; // message is truncated
unsigned aa:1 GNUNET_PACKED; // authoritative answer
unsigned op:4 GNUNET_PACKED; // query:0, inverse q.:1, status: 2
unsigned qr:1 GNUNET_PACKED; // query:0, response:1
unsigned rcode:4 GNUNET_PACKED; // 0 No error
// 1 Format error
// 2 Server failure
// 3 Name Error
// 4 Not Implemented
// 5 Refused
unsigned z:3 GNUNET_PACKED; // reserved
unsigned ra:1 GNUNET_PACKED; // recursion available (server -> client)
uint16_t qdcount GNUNET_PACKED; // number of questions
uint16_t ancount GNUNET_PACKED; // number of answers
uint16_t nscount GNUNET_PACKED; // number of authority-records
uint16_t arcount GNUNET_PACKED; // number of additional records
};
GNUNET_NETWORK_STRUCT_END
struct dns_pkt
{
struct dns_static s;
unsigned char data[1];
};
struct dns_pkt_parsed
{
struct dns_static s;
struct dns_query **queries;
struct dns_record **answers;
struct dns_record **nameservers;
struct dns_record **additional;
};
struct dns_query_line
{
uint16_t type;
uint16_t class;
};
struct dns_query
{
char *name;
unsigned char namelen;
uint16_t qtype;
uint16_t qclass;
};
struct dns_record_line
{
uint16_t type;
uint16_t class;
uint32_t ttl;
uint16_t data_len;
unsigned char data;
};
struct dns_record
{
char *name;
unsigned char namelen;
uint16_t type;
uint16_t class;
uint32_t ttl;
uint16_t data_len;
unsigned char *data;
};
struct dns_pkt_parsed *
parse_dns_packet (struct dns_pkt *pkt);
struct dns_pkt *
unparse_dns_packet (struct dns_pkt_parsed *pkt);
void
free_parsed_dns_packet (struct dns_pkt_parsed *ppkt);
#endif
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