htonl(3)htonl(3)NAMEhtonl - 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 stan‐
dards as follows:
htonl(): XNS4.0, XNS5.0
Refer to the standards(5) reference page for more information about
industry standards and associated tags.
PARAMETERS
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 net‐
work-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 inte‐
ger 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
htonl(3)