ecos/packages/net/tcpip/current/doc/inet_addr.html


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40

<html>
<body>
<pre>
NAME
       inet_aton, inet_addr, inet_ntoa -  Internet  address
       manipulation routines

SYNOPSIS
       #include &lt;network.h&gt;

       int inet_aton(const char *cp, struct in_addr *inp);

       unsigned long int inet_addr(const char *cp);

       char *inet_ntoa(struct in_addr in);

DESCRIPTION
       inet_aton() converts the Internet host address cp from the
       standard numbers-and-dots notation into  binary  data  and
       stores  it  in the structure that inp points to. inet_aton
       returns nonzero if the address is valid, zero if not.

       The  inet_addr()  function  converts  the  Internet   host
       address cp from numbers-and-dots notation into binary data
       in  network  byte  order.   If  the  input   is   invalid,
       INADDR_NONE (usually -1) is returned.  This is an obsolete
       interface to inet_aton, described immediately above; it is
       obsolete  because -1 is a valid address (255.255.255.255),
       and inet_aton provides a cleaner  way  to  indicate  error
       return.

       The   inet_ntoa()  function  converts  the  Internet  host
       address in given in network byte  order  to  a  string  in
       standard   numbers-and-dots   notation.    The  string  is
       returned in a statically allocated  buffer,  which  subse
       quent calls will overwrite.

</pre>
</body>
</html>