1BYTEORDER(3)               Linux Programmer's Manual              BYTEORDER(3)
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NAME

6       htonl,  htons,  ntohl,  ntohs - convert values between host and network
7       byte order
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SYNOPSIS

10       #include <arpa/inet.h>
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12       uint32_t htonl(uint32_t hostlong);
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14       uint16_t htons(uint16_t hostshort);
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16       uint32_t ntohl(uint32_t netlong);
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18       uint16_t ntohs(uint16_t netshort);
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DESCRIPTION

21       The htonl() function converts the unsigned integer hostlong  from  host
22       byte order to network byte order.
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24       The htons() function converts the unsigned short integer hostshort from
25       host byte order to network byte order.
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27       The ntohl() function converts the unsigned integer netlong from network
28       byte order to host byte order.
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30       The  ntohs() function converts the unsigned short integer netshort from
31       network byte order to host byte order.
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33       On the i386 the host  byte  order  is  Least  Significant  Byte  first,
34       whereas  the  network byte order, as used on the Internet, is Most Sig‐
35       nificant Byte first.
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ATTRIBUTES

38       For  an  explanation  of  the  terms  used   in   this   section,   see
39       attributes(7).
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41       ┌───────────────────────────────────┬───────────────┬─────────┐
42       │Interface                          │ Attribute     │ Value   │
43       ├───────────────────────────────────┼───────────────┼─────────┤
44       │htonl(), htons(), ntohl(), ntohs() │ Thread safety │ MT-Safe │
45       └───────────────────────────────────┴───────────────┴─────────┘

CONFORMING TO

47       POSIX.1-2001, POSIX.1-2008.
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49       Some  systems  require  the  inclusion  of  <netinet/in.h>  instead  of
50       <arpa/inet.h>.
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SEE ALSO

53       bswap(3), endian(3), gethostbyname(3), getservent(3)
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COLOPHON

56       This page is part of release 4.15 of the Linux  man-pages  project.   A
57       description  of  the project, information about reporting bugs, and the
58       latest    version    of    this    page,    can     be     found     at
59       https://www.kernel.org/doc/man-pages/.
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63GNU                               2017-09-15                      BYTEORDER(3)
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