qdnslookup_unix.cpp File Reference

(e3f520e621a9ea631d8a1d2f9bfc7a5f20dc698a)

#include "qdnslookup_p.h"
#include <qendian.h>
#include <qscopedpointer.h>
#include <qspan.h>
#include <qurl.h>
#include <qvarlengtharray.h>
#include <private/qnativesocketengine_p.h>
#include <private/qtnetwork-config_p.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/nameser.h>
#include <errno.h>
#include <resolv.h>
#include <array>

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Macros
#define	T_OPT   ns_t_opt

Typedefs
using	ReplyBuffer = QDnsLookupRunnable::ReplyBuffer
using	QueryBuffer = std::array<unsigned char, (QueryBufferSize + 15) / 16 * 16>
using	Cache = QList<QDnsCachedName>
template<bool Condition>
using	EnableIfIPv6 = std::enable_if_t<Condition, const QHostAddress *>

Functions
	QT_REQUIRE_CONFIG (libresolv)
	Q_DECLARE_TYPEINFO (QDnsCachedName, Q_RELOCATABLE_TYPE)
template<typename T >
void	setNsMap (T &ext, std::enable_if_t< sizeof(T::nsmap) !=0, uint16_t > v)
template<typename T >
void	setNsMap (T &,...)
template<typename State >
bool	setIpv6NameServer (State *state, EnableIfIPv6< sizeof(std::declval< State >()._u._ext.nsaddrs) !=0 > addr, quint16 port)
template<typename State >
bool	setIpv6NameServer (State *, const void *, quint16)
static bool	applyNameServer (res_state state, const QHostAddress &nameserver, quint16 port)
static int	prepareQueryBuffer (res_state state, QueryBuffer &buffer, const char *label, ns_rcode type)
static int	sendStandardDns (QDnsLookupReply *reply, res_state state, QSpan< unsigned char > qbuffer, ReplyBuffer &buffer, const QHostAddress &nameserver, quint16 port)

Variables
static constexpr unsigned char	Edns0Record []
static constexpr qsizetype	QueryBufferSize

Macro Definition Documentation

T_OPT

#define T_OPT   ns_t_opt

Definition at line 30 of file qdnslookup_unix.cpp.

Typedef Documentation

Cache

using Cache = QList<QDnsCachedName>

Definition at line 63 of file qdnslookup_unix.cpp.

EnableIfIPv6

template<bool Condition>

using EnableIfIPv6 = std::enable_if_t<Condition, const QHostAddress *>

Definition at line 90 of file qdnslookup_unix.cpp.

QueryBuffer

using QueryBuffer = std::array<unsigned char, (QueryBufferSize + 15) / 16 * 16>

Definition at line 52 of file qdnslookup_unix.cpp.

ReplyBuffer

using ReplyBuffer = QDnsLookupRunnable::ReplyBuffer

Definition at line 36 of file qdnslookup_unix.cpp.

Function Documentation

applyNameServer()

static bool applyNameServer ( res_state state, const QHostAddress & nameserver, quint16 port )

static

Definition at line 121 of file qdnslookup_unix.cpp.

References QAbstractSocket::IPv6Protocol, QHostAddress::protocol(), setIpv6NameServer(), and state.

Referenced by sendStandardDns().

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prepareQueryBuffer()

static int prepareQueryBuffer ( res_state state, QueryBuffer & buffer, const char * label, ns_rcode type )

static

Definition at line 133 of file qdnslookup_unix.cpp.

References Edns0Record, Q_ASSERT, Q_UNLIKELY, and state.

Q_DECLARE_TYPEINFO()

Q_DECLARE_TYPEINFO	(	QDnsCachedName	,
		Q_RELOCATABLE_TYPE	)

QT_REQUIRE_CONFIG()

QT_REQUIRE_CONFIG

(

libresolv

)

sendStandardDns()

static int sendStandardDns ( QDnsLookupReply * reply, res_state state, QSpan< unsigned char > qbuffer, ReplyBuffer & buffer, const QHostAddress & nameserver, quint16 port )

static

Definition at line 150 of file qdnslookup_unix.cpp.

References applyNameServer(), Edns0Record, header(), QHostAddress::isNull(), Q_UNLIKELY, qt_error_string(), reply, QDnsLookup::ResolverError, QDnsLookup::ServerRefusedError, QNetworkReply::setError(), and state.

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setIpv6NameServer() [1/2]

template<typename State >

bool setIpv6NameServer	(	State *	,
		const void *	,
		quint16	)

Definition at line 115 of file qdnslookup_unix.cpp.

setIpv6NameServer() [2/2]

template<typename State >

bool setIpv6NameServer	(	State *	state,
		EnableIfIPv6< sizeof(std::declval< State >()._u._ext.nsaddrs) !=0 >	addr,
		quint16	port )

Definition at line 93 of file qdnslookup_unix.cpp.

References Q_CHECK_PTR(), setNsMap(), and state.

Referenced by applyNameServer().

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setNsMap() [1/2]

template<typename T >

void setNsMap	(	T &	,
			... )

Definition at line 84 of file qdnslookup_unix.cpp.

setNsMap() [2/2]

template<typename T >

void setNsMap	(	T &	ext,
		std::enable_if_t< sizeof(T::nsmap) !=0, uint16_t >	v )

Definition at line 76 of file qdnslookup_unix.cpp.

Referenced by setIpv6NameServer().

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Variable Documentation

Edns0Record

constexpr unsigned char Edns0Record[]

staticconstexpr

Initial value:

= {
    0x00,                                           
    T_OPT >> 8, T_OPT & 0xff,                       
    ReplyBuffer::PreallocatedSize >> 8, ReplyBuffer::PreallocatedSize & 0xff,   
    NOERROR,                                        
    0,                                              
    0x00, 0x00,                                     
    0x00, 0x00,                                     
}

Definition at line 39 of file qdnslookup_unix.cpp.

Referenced by prepareQueryBuffer(), and sendStandardDns().

QueryBufferSize

constexpr qsizetype QueryBufferSize

staticconstexpr

Initial value:

=
        HFIXEDSZ + QFIXEDSZ + MAXCDNAME + 1 + sizeof(Edns0Record)

Definition at line 50 of file qdnslookup_unix.cpp.