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);
13       uint16_t htons(uint16_t hostshort);
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15       uint32_t ntohl(uint32_t netlong);
16       uint16_t ntohs(uint16_t netshort);
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DESCRIPTION

19       The htonl() function converts the unsigned integer hostlong  from  host
20       byte order to network byte order.
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22       The htons() function converts the unsigned short integer hostshort from
23       host byte order to network byte order.
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25       The ntohl() function converts the unsigned integer netlong from network
26       byte order to host byte order.
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28       The  ntohs() function converts the unsigned short integer netshort from
29       network byte order to host byte order.
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31       On the i386 the host  byte  order  is  Least  Significant  Byte  first,
32       whereas  the  network byte order, as used on the Internet, is Most Sig‐
33       nificant Byte first.
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ATTRIBUTES

36       For an  explanation  of  the  terms  used  in  this  section,  see  at‐
37       tributes(7).
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39       ┌────────────────────────────────────────────┬───────────────┬─────────┐
40       │Interface                                   │ Attribute     │ Value   │
41       ├────────────────────────────────────────────┼───────────────┼─────────┤
42       │htonl(), htons(), ntohl(), ntohs()          │ Thread safety │ MT-Safe │
43       └────────────────────────────────────────────┴───────────────┴─────────┘
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CONFORMING TO

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

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

55       This page is part of release 5.13 of the Linux  man-pages  project.   A
56       description  of  the project, information about reporting bugs, and the
57       latest    version    of    this    page,    can     be     found     at
58       https://www.kernel.org/doc/man-pages/.
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62GNU                               2021-03-22                      BYTEORDER(3)
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