BYTEORDER(3) BSD Programmer's Manual BYTEORDER(3) NNAAMMEE hhttoonnll, hhttoonnss, nnttoohhll, nnttoohhss - convert values between host and network byte order SSYYNNOOPPSSIISS ##iinncclluuddee <> _u___l_o_n_g hhttoonnll(_u___l_o_n_g _h_o_s_t_l_o_n_g); _u___s_h_o_r_t hhttoonnss(_u___s_h_o_r_t _h_o_s_t_s_h_o_r_t); _u___l_o_n_g nnttoohhll(_u___l_o_n_g _n_e_t_l_o_n_g); _u___s_h_o_r_t nnttoohhss(_u___s_h_o_r_t _n_e_t_s_h_o_r_t); DDEESSCCRRIIPPTTIIOONN These routines convert 16 and 32 bit quantities between network byte or- der 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). SSEEEE AALLSSOO gethostbyname(3), getservent(3) HHIISSTTOORRYY The bbyytteeoorrddeerr functions appeared in 4.2BSD. BBUUGGSS On the VAX bytes are handled backwards from most everyone else in the world. This is not expected to be fixed in the near future. 4.2 Berkeley Distribution June 4, 1993 1