Linux 2.6 - man page for ntohs (linux section 3posix)
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HTONL(P) POSIX Programmer's Manual HTONL(P)
htonl, htons, ntohl, ntohs - convert values between host and network byte order
uint32_t htonl(uint32_t hostlong);
uint16_t htons(uint16_t hostshort);
uint32_t ntohl(uint32_t netlong);
uint16_t ntohs(uint16_t netshort);
These functions shall convert 16-bit and 32-bit quantities between network byte order and
host byte order.
On some implementations, these functions are defined as macros.
The uint32_t and uint16_t types are defined in <inttypes.h>.
The htonl() and htons() functions shall return the argument value converted from host to
network byte order.
The ntohl() and ntohs() functions shall return the argument value converted from network
to host byte order.
No errors are defined.
The following sections are informative.
These functions are most often used in conjunction with IPv4 addresses and ports as
returned by gethostent() and getservent().
endhostent() , endservent() , the Base Definitions volume of IEEE Std 1003.1-2001, <int-
Portions of this text are reprinted and reproduced in electronic form from IEEE Std
1003.1, 2003 Edition, Standard for Information Technology -- Portable Operating System
Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by
the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the
event of any discrepancy between this version and the original IEEE and The Open Group
Standard, the original IEEE and The Open Group Standard is the referee document. The orig-
inal Standard can be obtained online at http://www.opengroup.org/unix/online.html .
IEEE/The Open Group 2003 HTONL(P)
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