byteorder.3n (2010 09)

byteorder(3N) byteorder(3N)

NAME

htonl( ), htons( ), ntohl( ), ntohs( ) - convert values between host and network byte order

SYNOPSIS

#include <netinet/in.h>

_XOPEN_SOURCE_EXTENDED only

#include <arpa/inet.h>

unsigned long htonl(unsigned long hostlong);

unsigned short htons(unsigned short hostshort);

unsigned long ntohl(unsigned long netlong);

unsigned short ntohs(unsigned short netshort);

DESCRIPTION

These routines convert 16- and 32-bit quantities between network byte order and host byte order. On

HP-UX systems, network and host byte orders are identical, so these routines are deﬁned as null macros

in the include ﬁle <netinet/in.h>

.If_XOPEN_SOURCE_EXTENDED

is deﬁned then these routines

are deﬁned in the include ﬁle

<arpa/inet.h>.

These routines are most often used in conjunction with Internet addresses and ports as returned by

gethostent() and getservent() (see gethostent (3N) and getservent (3N)). Use these routines to

write portable programs.

AUTHOR

byteorder() was developed by the University of California, Berkeley.

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byteorder(3N) byteorder(3N) NAME htonl( ), htons( ), ntohl( ), ntohs( ) - convert values between host and network byte order SYNOPSIS #include _XOPEN_SOURCE_EXTENDED only #include unsigned long htonl(unsigned long hostlong); unsigned short htons(unsigned short hostshort); unsigned long ntohl(unsigned long netlong); A unsigned short ntohs(unsigned short netshort); DESCRIPTION These routines convert 16- and 32-bit quantities between network byte order and host byte order.
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(Notes) A (Notes) bA 2 Hewlett-Packard Company −1− HP-UX 11i Version 3: September 2010