inet_network(3)inet_network(3)NAMEinet_network - Translate an Internet dot-formatted address string to a
network address integer
SYNOPSIS
#include <arpa/inet.h>
in_addr_t inet_network(
const char *string );
LIBRARY
Standard C Library (libc)
STANDARDS
Interfaces documented on this reference page conform to industry stan‐
dards as follows:
inet_network(): XNS4.0, XNS5.0
Refer to the standards(5) reference page for more information about
industry standards and associated tags.
PARAMETERS
Defines an Internet dot-formatted address as the character string
a.b.c.d, where a, b, c and d may be expressed as decimal, octal, or
hexadecimal in the C-language idiom.
DESCRIPTION
The inet_network() function translates a dot-formatted Internet network
character address string to a network byte-ordered address (most sig‐
nificant byte leftmost, least significant byte rightmost).
Values specified using dot notation take on one of the following forms:
When all four parts are specified, each is interpreted as a byte of
data and assigned, from left to right, to the four bytes of an Internet
address. When three parts are specified, the last part is interpreted
as a 16-bit quantity and placed in the rightmost two bytes of the net‐
work address. This format is convenient for specifying Class B network
addresses as 128.net.host. When two parts are specified, the last part
is interpreted as a 24-bit quantity and placed in the rightmost three
bytes of the network address. This format is convenient for specifying
Class A network addresses as net.host. When only one part is speci‐
fied, the value is stored directly in the network address without any
byte rearrangement.
All numbers supplied as parts in dot notation can be decimal, octal, or
hexadecimal, as specified in the ISO C standard. A leading 0x or 0X
implies hexadecimal and a leading 0 implies octal. Otherwise, the num‐
ber is interpreted as decimal.
RETURN VALUES
Upon successful completion, the inet_network() function returns an
Internet byte-ordered address. Otherwise, it returns (in_addr_t)-1.
ERRORS
Current industry standards for inet_network() do not define error val‐
ues.
SEE ALSO
Functions: inet_netof(3), inet_lnaof(3), inet_makeaddr(3),
inet_addr(3), inet_ntoa(3)
Standards: standards(5)
Network Programmer's Guide
inet_network(3)
