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ipsec_addrbytesof ()
  • >> ipsec_addrbytesof (3) ( Разные man: Библиотечные вызовы )
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    NAME

    ipsec initaddr - initialize an ip_address
    
    ipsec addrtypeof - get address type of an ip_address
    ipsec addrlenof - get length of address within an ip_address
    ipsec addrbytesof - get copy of address within an ip_address
    ipsec addrbytesptr - get pointer to address within an ip_address  

    SYNOPSIS

    #include <freeswan.h>

    const char *initaddr(const char *src, size_t srclen,
      int af, ip_address *dst);
    int addrtypeof(const ip_address *src);
    size_t addrlenof(const ip_address *src);
    size_t addrbytesof(const ip_address *src,
      unsigned char *dst, size_t dstlen);
    size_t addrbytesptr(const ip_address *src,
      const unsigned char **dst);  

    DESCRIPTION

    The <freeswan.h> library uses an internal type ip_address to contain one of the (currently two) types of IP address. These functions provide basic tools for creating and examining this type.

    Initaddr initializes a variable *dst of type ip_address from an address (in network byte order, indicated by a pointer src and a length srclen) and an address family af (typically AF_INET or AF_INET6). The length must be consistent with the address family.

    Addrtypeof returns the address type of an address, normally AF_INET or AF_INET6. (The <freeswan.h> header file arranges to include the necessary headers for these names to be known.)

    Addrlenof returns the size (in bytes) of the address within an ip_address, to permit storage allocation etc.

    Addrbytesof copies the address within the ip_address src to the buffer indicated by the pointer dst and the length dstlen, and returns the address length (in bytes). If the address will not fit, as many bytes as will fit are copied; the returned length is still the full length. It is the caller's responsibility to check the returned value to ensure that there was enough room.

    Addrbytesptr sets *dst to a pointer to the internal address within the ip_address, and returns the address length (in bytes). If dst is NULL, it just returns the address length. The pointer points to const to discourage misuse.

    Initaddr returns NULL for success and a pointer to a string-literal error message for failure; see DIAGNOSTICS.

    The functions which return size_t return 0 for a failure.  

    SEE ALSO

    inet(3), ipsec_ttoaddr(3)  

    DIAGNOSTICS

    An unknown address family is a fatal error for any of these functions except addrtypeof. An address-size mismatch is a fatal error for initaddr.  

    HISTORY

    Written for the FreeS/WAN project by Henry Spencer.  

    BUGS

    Addrtypeof should probably have been named addrfamilyof.


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    SEE ALSO
    DIAGNOSTICS
    HISTORY
    BUGS


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