Detailed Description
The QHostAddress class provides an IP address.
This class contains an IP address in a platform and protocol
independent manner. It stores both IPv4 and IPv6 addresses in a
way that you can easily access on any platform. (Qt does not
currently provide IPv6 support.)
QHostAddress is normally used with the classes QSocket,
QServerSocket and QSocketDevice to set up a server or to connect
to a host.
Host addresses may be set with setAddress() and retrieved with
ip4Addr() or toString().
See also QSocket, QServerSocket, QSocketDevice, and Input/Output and Networking.
Member Function Documentation
QHostAddress::QHostAddress ()
Creates a host address object with the IP address 0.0.0.0.
QHostAddress::QHostAddress ( Q_UINT32 ip4Addr )
Creates a host address object for the IPv4 address ip4Addr.
QHostAddress::QHostAddress ( Q_UINT8 * ip6Addr )
Creates a host address object with the specified IPv6 address.
ip6Addr must be a 16 byte array in network byte order
(high-order byte first).
QHostAddress::QHostAddress ( const QHostAddress & address )
Creates a copy of address.
QHostAddress::~QHostAddress () [virtual]
Destroys the host address object.
Q_UINT32 QHostAddress::ip4Addr () const
Returns the IPv4 address as a number.
For example, if the address is 127.0.0.1, the returned value is
2130706433 (i.e. 0x7f000001).
This value is only valid when isIp4Addr() returns TRUE.
See also toString().
bool QHostAddress::isIp4Addr () const
Returns TRUE if the host address represents an IPv4 address;
otherwise returns FALSE.
bool QHostAddress::isNull () const
Returns TRUE if this host address is null (INADDR_ANY or in6addr_any). The
default constructor creates a null address, and that address isn't valid
for any particular host or interface.
Assigns another host address object address to this object and
returns a reference to this object.
bool QHostAddress::operator== ( const QHostAddress & other ) const
Returns TRUE if this host address is the same as other;
otherwise returns FALSE.
void QHostAddress::setAddress ( Q_UINT32 ip4Addr )
Set the IPv4 address specified by ip4Addr.
void QHostAddress::setAddress ( Q_UINT8 * ip6Addr )
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
Set the IPv6 address specified by ip6Addr.
ip6Addr must be a 16 byte array in network byte order
(high-order byte first).
bool QHostAddress::setAddress ( const QString & address )
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
Sets the IPv4 or IPv6 address specified by the string
representation address (e.g. "127.0.0.1"). Returns TRUE and
sets the address if the address was successfully parsed; otherwise
returns FALSE and leaves the address unchanged.
QString QHostAddress::toString () const
Returns the address as a string.
For example, if the address is the IPv4 address 127.0.0.1, the
returned string is "127.0.0.1".
See also ip4Addr().
This file is part of the Qt toolkit.
Copyright © 1995-2003
Trolltech. All Rights Reserved.
