NAME

htonl − Convert an unsigned 32-bit integer from host byte order to Internet network-byte order

SYNOPSIS

#include <arpa/inet.h>
in_addr_t htonl(
        in_addr_t hostint );

LIBRARY

Standard C Library (libc)

STANDARDS

Interfaces documented on this reference page conform to industry standards as follows:

htonl():  XNS4.0, XNS5.0

Refer to the standards(5) reference page for more information about industry standards and associated tags. 

PARAMETERS

hostint
Specifies a 32-bit integer in host byte order.

DESCRIPTION

The htonl() (host-to-network long) function converts an unsigned 32-bit integer from host byte order to Internet network-byte order. 

The Internet network requires address and port reference data in network-byte order. Use the htonl() function to convert address and port integers from Internet host byte order to Internet network-byte ordered integers. 

RETURN VALUES

Upon successful completion, the htonl() function returns a 32-bit integer in Internet network-byte order. 

ERRORS

Current industry standards do not define error values for the htonl() function. 

SEE ALSO

Functions: endhostent(3), endservent(3), htons(3), ntohl(3), ntohs(3)

Standards: standards(5)

Network Programmer’s Guide