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ntohl (3)
  • ntohl (3) ( FreeBSD man: Библиотечные вызовы )
  • ntohl (3) ( Русские man: Библиотечные вызовы )
  • ntohl (3) ( Linux man: Библиотечные вызовы )
  • >> ntohl (3) ( POSIX man: Библиотечные вызовы )
  •  

    NAME

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

    SYNOPSIS

    #include <arpa/inet.h>

    uint32_t htonl(uint32_t hostlong);
    uint16_t htons(uint16_t
    hostshort);
    uint32_t ntohl(uint32_t
    netlong);
    uint16_t ntohs(uint16_t
    netshort);
     

    DESCRIPTION

    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>.  

    RETURN VALUE

    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.  

    ERRORS

    No errors are defined.

    The following sections are informative.  

    EXAMPLES

    None.  

    APPLICATION USAGE

    These functions are most often used in conjunction with IPv4 addresses and ports as returned by gethostent() and getservent().  

    RATIONALE

    None.  

    FUTURE DIRECTIONS

    None.  

    SEE ALSO

    endhostent() , endservent() , the Base Definitions volume of IEEE Std 1003.1-2001, <inttypes.h>, <arpa/inet.h>  

    COPYRIGHT

    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 original Standard can be obtained online at http://www.opengroup.org/unix/online.html .


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    RETURN VALUE
    ERRORS
    EXAMPLES
    APPLICATION USAGE
    RATIONALE
    FUTURE DIRECTIONS
    SEE ALSO
    COPYRIGHT


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