ip_address

A TCP/IP host has one IP address for each network to which it is connected. If a host is connected to more than one network, that host is called a multihomed host .

An IP address is stored as a 32-bit number and is often displayed as four one-byte numbers. IP addresses are classified as A, B, C, or D addresses and often have a symbolic equivalent. For example, the following table lists the numeric IP address equivalent for several symbolic addresses.
Many of the network-related features of Network<ToolKit> either require IP addresses or return them. You can construct an os_ip_address object from either a symbolic name or from the symbolic name's numeric equivalent.

Symbolic Name Numeric Equivalent

jupiter

128.51.200.1

saturn

128.51.200.2

mars

128.51.200.3

neptune

128.51.200.4

Symbolic Name	Numeric Equivalent
jupiter	128.51.200.1
saturn	128.51.200.2
mars	128.51.200.3
neptune	128.51.200.4

Example <ospace/network/examples/ipaddr1.cpp>


  #include <iostream>
#include <ospace/network.h>

void
main()
  {
  os_network_toolkit initialize;
  os_ip_address addr1( "shazam" );
  cout << addr1 << " is a class type " << addr1.class_type();
  cout << " address" << endl;
  os_ip_address addr2( "128.41.200.7" );
  cout << addr2 << endl;
  }
os_ip_address( 200.1.1.3 ) is a class type C address
os_ip_address( 128.41.200.7 )

Conversions enable interchangeable use of IP addresses and in_addr structures.