poslib/dnsmessage.h File Reference

DNS message functions. More...

Go to the source code of this file.

Classes
class	message_buff
	message buffer More...
class	DnsQuestion
	DNS question object. More...
class	DnsRR
	resource record More...
class	DnsMessage
	DNS message. More...
class	a_record
	ipv4 address More...
class	aaaa_record
	ipv6 address More...
class	mx_record
	mx record More...
class	rrdat
Enumerations
enum	_answer_type {   A_ERROR, A_CNAME, A_NXDOMAIN, A_ANSWER,   A_REFERRAL, A_NODATA }
	Enumeration of different possible answer types. More...
Functions
u_int16	uint16_value (char *buff)
u_int32	uint32_value (char *buff)
char *	uint16_buff (uint16_t val)
char *	uint32_buff (uint32_t val)
DnsMessage *	create_query (domainname QNAME, uint16_t QTYPE=DNS_TYPE_A, bool RD=true, uint16_t QCLASS=CLASS_IN)
	create a query message
a_record	get_a_record (DnsMessage *a)
	Gets the first address in the answer to an address query.
	stl_list (a_record) get_a_records(DnsMessage *a
	Gets a list of addresses in the answer to an address query.
aaaa_record	get_aaaa_record (DnsMessage *a)
	Gets the first IPv6 address in the answer to an IPv6 address query.
	stl_list (aaaa_record) get_aaaa_records(DnsMessage *a
	Gets a list of addresses in the answer to an IPv6 address query.
mx_record	get_mx_record (DnsMessage *a)
	Gets the first MX record in te answer to a MX query.
	stl_list (mx_record) get_mx_records(DnsMessage *a
	Gets a list of MX records in te answer to a MX query.
domainname	get_ns_record (DnsMessage *a)
	Gets the first NS record in te answer to a NS query.
	stl_list (domainname) get_ns_records(DnsMessage *a
	Gets the list of NS records in te answer to a NS query.
domainname	get_ptr_record (DnsMessage *a)
	Gets the first PTR record in te answer to a PTR query.
	stl_list (rrdat) get_records(DnsMessage *a
	Gets a list of all RRs in the answer section answering the DNS query. May follow CNAMEs. */.
_answer_type	check_answer_type (DnsMessage *msg, domainname &qname, uint16_t qtype)
	Returns the answer type of an answer message for a given query.
bool	has_rrset (stl_list(DnsRR)&rrlist, domainname &QNAME, uint16_t QTYPE=QTYPE_ANY)
	Returns true if the given RRset is present in the DNS message section.
Variables
bool	fail_if_none = false)

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Detailed Description

DNS message functions.

This file contains functions and classes for dealing with DNS messages. The DnsMessage class is used to represent a DNS message, and some functions for reading numbers from binary DNS data are also included.

Definition in file dnsmessage.h.

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Enumeration Type Documentation

enum _answer_type

Enumeration of different possible answer types. Enumeration values: A_CNAME  Error. A_NXDOMAIN  Alias. A_ANSWER  Domain doesn't exist. A_REFERRAL  Answer. A_NODATA  No such data. Definition at line 567 of file dnsmessage.h.

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Function Documentation

DnsMessage* create_query (  domainname  QNAME, uint16_t  QTYPE = DNS_TYPE_A, bool  RD = true, uint16_t  QCLASS = CLASS_IN )

create a query message Creates a Dns question message which can be used to query a DNS server. This message is dynamically allocated, so you'll have to delete it yourself. Parameters: QNAME  Domain name to query. See DnsQuestion::QNAME. QTYPE  Type of RR to query. See DnsQuestion::QTYPE for more information. Defaults to DNS_TYPE_A . RD  whether we want the server to do recursion. See DnsMessage::RD. Defaults to true . QCLASS  The class to query in. See DnsQuestion::QCLASS. Defaults to CLASS_IN . Returns: DNS message containing the query.

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