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NAMEhtonl , htons ,
ntohl , ntohs —
convert values between host and network byte order
LIBRARYStandard C Library (libc, -lc)SYNOPSIS#include <arpa/inet.h>
or
uint32_t
uint16_t
uint32_t
uint16_t
DESCRIPTIONThese routines convert 16 and 32 bit quantities between network byte order and host byte order. On machines which have a byte order which is the same as the network order, routines are defined as null macros.These routines are most often used in conjunction with Internet addresses and ports as returned by gethostbyname(3) and getservent(3). SEE ALSOgethostbyname(3), getservent(3), byteorder(9)STANDARDSThebyteorder functions conform to IEEE
Std 1003.1-2001 (“POSIX.1”).
HISTORYThebyteorder functions appeared in
4.2BSD.
BUGSOn the VAX bytes are handled backwards from most everyone else in the world. This is not expected to be fixed in the near future.
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