BYTEORDER(3) Linux Programmer's Manual BYTEORDER(3)

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

SYNOPSIS
       #include 

       uint32t htonl(uint32t hostlong);

       uint16t htons(uint16t hostshort);

       uint32t ntohl(uint32t netlong);

       uint16t ntohs(uint16t netshort);

DESCRIPTION
       The htonl() function converts the unsigned integer hostlong  from  host
       byte order to network byte order.

       The htons() function converts the unsigned short integer hostshort from
       host byte order to network byte order.

       The ntohl() function converts the unsigned integer netlong from network
       byte order to host byte order.

       The  ntohs() function converts the unsigned short integer netshort from
       network byte order to host byte order.

       On the i386 the host  byte  order  is  Least  Significant  Byte  first,
       whereas  the  network byte order, as used on the Internet, is Most Sig‐
       nificant Byte first.

ATTRIBUTES
       For  an  explanation  of  the  terms  used   in   this   section,   see
       attributes(7).

       ┌───────────────────────────────────┬───────────────┬─────────┐
       │Interface                          │ Attribute     │ Value   │
       ├───────────────────────────────────┼───────────────┼─────────┤
       │htonl(), htons(), ntohl(), ntohs() │ Thread safety │ MT-Safe │
       └───────────────────────────────────┴───────────────┴─────────┘
CONFORMING TO
       POSIX.1-2001.

       Some  systems  require  the  inclusion  of    instead  of
       .

SEE ALSO
       endian(3), gethostbyname(3), getservent(3)

COLOPHON
       This page is part of release 3.53 of the Linux  man-pages  project.   A
       description  of  the project, and information about reporting bugs, can
       be found at http://www.kernel.org/doc/man-pages/.



GNU                               2009-01-15                      BYTEORDER(3)