Returns the network id of the given Internet address.
Standard C Library (libc.a)
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <netinet/in.h>
#include <arpa/inet.h>
int inet_netof ( InternetAddr)
struct in_addr InternetAddr;
The inet_netof subroutine returns the network number from the specified Internet address number typed as unsigned long value. The inet_netof subroutine masks off the network number and the host number from the Internet address based on the Internet address class.
All applications containing the inet_netof subroutine must be compiled with _BSD set to a specific value. Acceptable values are 43 and 44. In addition, all socket applications must include the BSD libbsd.a library.
| InternetAddr | |
| Specifies the Internet address to separate. | |
Upon successful completion, the inet_netof subroutine returns a network number from the specified long value representing the Internet address. If the application gives a class A Internet address, the inet_lnoaf subroutine returns the logical product of the Internet address and 0xFF000000. If the application gives a class B Internet address, the inet_lnoaf subroutine returns the logical product of the Internet address and 0xFFFF0000. If the application does not give a class A or B Internet address, the inet_lnoaf subroutine returns the logical product of the Internet address and 0xFFFFFF00.
| /etc/hosts | |
| Contains host names. | |
| /etc/networks | |
| Contains network names. | |
The endhostent subroutine, endnetent subroutine, gethostbyaddr subroutine, gethostbyname subroutine, getnetbyaddr subroutine, getnetbyname subroutine, getnetent subroutine, inet_addr subroutine, inet_lnaof subroutine, inet_makeaddr subroutine, inet_network subroutine, inet_ntoa subroutine, sethostent subroutine, setnetent subroutine.
Sockets Overview and Understanding Network Address Translation in AIX 5L Version 5.2 Communications Programming Concepts.