The QNetworkAddressEntry class stores one IP address supported by a network interface, along with its associated netmask and broadcast address. 更多...
The QNetworkAddressEntry class stores one IP address supported by a network interface, along with its associated netmask and broadcast address.
Each network interface can contain zero or more IP addresses, which in turn can be associated with a netmask and/or a broadcast address (depending on support from the operating system).
此类表示一个这样的组。
构造空 QNetworkAddressEntry 对象。
构造 QNetworkAddressEntry object that is a copy of the object other .
Returns the broadcast address associated with the IPv4 address and netmask. It can usually be derived from those two by setting to 1 the bits of the IP address where the netmask contains a 0. (In other words, by bitwise-OR'ing the IP address with the inverse of the netmask)
This member is always empty for IPv6 addresses, since the concept of broadcast has been abandoned in that system in favor of multicast. In particular, the group of hosts corresponding to all the nodes in the local network can be reached by the "all-nodes" special multicast group (address FF02.1).
另请参阅 setBroadcast ().
This function returns one IPv4 or IPv6 address found, that was found in a network interface.
另请参阅 setIp ().
Returns the netmask associated with the IP address. The netmask is expressed in the form of an IP address, such as 255.255.0.0.
For IPv6 addresses, the prefix length is converted to an address where the number of bits set to 1 is equal to the prefix length. For a prefix length of 64 bits (the most common value), the netmask will be expressed as a QHostAddress holding the address FFFF:FFFF:FFFF:FFFF.
另请参阅 setNetmask () 和 prefixLength ().
Returns the prefix length of this IP address. The prefix length matches the number of bits set to 1 in the netmask (see netmask ()). For IPv4 addresses, the value is between 0 and 32. For IPv6 addresses, it's contained between 0 and 128 and is the preferred form of representing addresses.
This function returns -1 if the prefix length could not be determined (i.e., netmask () returns a null QHostAddress()).
该函数在 Qt 4.5 引入。
另请参阅 setPrefixLength () and netmask ().
Sets the broadcast IP address of this QNetworkAddressEntry object to newBroadcast .
另请参阅 broadcast ().
Sets the IP address the QNetworkAddressEntry object contains to newIp .
另请参阅 ip ().
Sets the netmask that this QNetworkAddressEntry object contains to newNetmask . Setting the netmask also sets the prefix length to match the new netmask.
另请参阅 netmask () 和 setPrefixLength ().
Sets the prefix length of this IP address to length 。 value of length must be valid for this type of IP address: between 0 and 32 for IPv4 addresses, between 0 and 128 for IPv6 addresses. Setting to any invalid value is equivalent to setting to -1, which means "no prefix length".
Setting the prefix length also sets the netmask (see netmask ()).
该函数在 Qt 4.5 引入。
另请参阅 prefixLength () 和 setNetmask ().
