projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 96af7611 KM |
1 | .\" Copyright (c) 1983 Regents of the University of California. |
| 2 | .\" All rights reserved. The Berkeley software License Agreement | |
| 3 | .\" specifies the terms and conditions for redistribution. | |
| 4 | .\" | |
| fd9e847f | 5 | .\" @(#)byteorder.3 6.2 (Berkeley) %G% |
| 96af7611 | 6 | .\" |
| c0acf85c | 7 | .TH BYTEORDER 3N "" |
| 96af7611 KM |
8 | .UC 5 |
| 9 | .SH NAME | |
| 10 | htonl, htons, ntohl, ntohs \- convert values between host and network byte order | |
| 11 | .SH SYNOPSIS | |
| 12 | .nf | |
| 13 | .B #include <sys/types.h> | |
| 14 | .B #include <netinet/in.h> | |
| 15 | .PP | |
| 16 | .B netlong = htonl(hostlong); | |
| 17 | .B u_long netlong, hostlong; | |
| 18 | .PP | |
| 19 | .B netshort = htons(hostshort); | |
| 20 | .B u_short netshort, hostshort; | |
| 21 | .PP | |
| 22 | .B hostlong = ntohl(netlong); | |
| 23 | .B u_long hostlong, netlong; | |
| 24 | .PP | |
| 25 | .B hostshort = ntohs(netshort); | |
| 26 | .B u_short hostshort, netshort; | |
| 27 | .fi | |
| 28 | .SH DESCRIPTION | |
| 29 | These routines convert 16 and 32 bit quantities between network | |
| 30 | byte order and host byte order. On machines such as the SUN | |
| 31 | these routines are defined as null macros in the include file | |
| 32 | .RI < netinet/in.h >. | |
| 33 | .PP | |
| 34 | These routines are most often used in conjunction with Internet | |
| 35 | addresses and ports as returned by | |
| fd9e847f | 36 | .IR gethostbyname (3N) |
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37 | and |
| 38 | .IR getservent (3N). | |
| 39 | .SH "SEE ALSO" | |
| fd9e847f | 40 | gethostbyname(3N), |
| 96af7611 KM |
41 | getservent(3N) |
| 42 | .SH BUGS | |
| 43 | The VAX handles bytes backwards from most everyone else in | |
| 44 | the world. This is not expected to be fixed in the near future. |