NAME

  tst_inet_pton_inet - Convert an text string address into its AF_INET numeric binary form


PURPOSE

  To check whether inet_pton can convert an text string address into
  its AF_INET numeric binary form correctly.


SYNOPSIS

  ./tst_inet_pton_inet [-tooloption ...]
    -tooloption : v6api tool option


TEST PROCEDURE

  1. Source address string is 192.168.0.1, should return 1
  2. Source address string is 192.168.0.01, should return 0
  3. Source address string is 192.168.0.FF, should return 0
  4. Source address string is 192.168.0.1000, should return 0
  5. Source address string is 192.168.0.256, should return 0
  6. Source address string is 192.168.0, should return 0
  7. Source address string is unix, not an AF_INET address, should return -1


NOTE

  None


REFERENCE

  RFC 3493
  6.3 Address Conversion Functions
    The two IPv4 functions inet_addr() and inet_ntoa() convert an IPv4
    address between binary and text form.  IPv6 applications need similar
    functions.  The following two functions convert both IPv6 and IPv4
    addresses:
    #include <arpa/inet.h>
    int inet_pton(int af, const char *src, void *dst);
    const char *inet_ntop(int af, const void *src,
                            char *dst, socklen_t size);
    The inet_pton() function shall convert an address in its standard
    text presentation form into its numeric binary form.  The af argument
    shall specify the family of the address.  The AF_INET and AF_INET6
    address families shall be supported.  The src argument points to the
    string being passed in.  The dst argument points to a buffer into
    which the function stores the numeric address; this shall be large
    enough to hold the numeric address (32 bits for AF_INET, 128 bits for
    AF_INET6).  The inet_pton() function shall return 1 if the conversion
    succeeds, with the address pointed to by dst in network byte order.
    It shall return 0 if the input is not a valid IPv4 dotted-decimal
    string or a valid IPv6 address string, or -1 with errno set to
    EAFNOSUPPORT if the af argument is unknown.
    If the af argument of inet_pton() is AF_INET, the src string shall be
    in the standard IPv4 dotted-decimal form:
      ddd.ddd.ddd.ddd
    where "ddd" is a one to three digit decimal number between 0 and 255.
    The inet_pton() function does not accept other formats (such as the
    octal numbers, hexadecimal numbers, and fewer than four numbers that
    inet_addr() accepts).
    If the af argument of inet_pton() is AF_INET6, the src string shall
    be in one of the standard IPv6 text forms defined in Section 2.2 of
    the addressing architecture specification [2].
    The inet_ntop() function shall convert a numeric address into a text
    string suitable for presentation.  The af argument shall specify the
    family of the address.  This can be AF_INET or AF_INET6.  The src
    argument points to a buffer holding an IPv4 address if the af
    argument is AF_INET, or an IPv6 address if the af argument is
    AF_INET6; the address must be in network byte order.  The dst
    argument points to a buffer where the function stores the resulting
    text string; it shall not be NULL.  The size argument specifies the
    size of this buffer, which shall be large enough to hold the text
    string (INET_ADDRSTRLEN characters for IPv4, INET6_ADDRSTRLEN
    characters for IPv6).
    In order to allow applications to easily declare buffers of the
    proper size to store IPv4 and IPv6 addresses in string form, the
    following two constants are defined in <netinet/in.h>:
      #define INET_ADDRSTRLEN    16
      #define INET6_ADDRSTRLEN   46
    The inet_ntop() function shall return a pointer to the buffer
    containing the text string if the conversion succeeds, and NULL
    otherwise.  Upon failure, errno is set to EAFNOSUPPORT if the af
    argument is invalid or ENOSPC if the size of the result buffer is
    inadequate.