inet_pton

inet_pton(3)               Linux Programmer's Manual              inet_pton(3)



NAME
       inet_pton - Create a network address structure

SYNOPSIS
       #include <sys/types.h>
       #include <sys/socket.h>
       #include <arpa/inet.h>

       int inet_pton(int af, const char *src, void *dst);

DESCRIPTION
       This  function converts the character string src into a network address
       structure in the af address family, then  copies  the  network  address
       structure to dst.

       inet_pton(3)  extends  the  inet_addr(3)  function  to support multiple
       address families, inet_addr(3) is now considered to  be  deprecated  in
       favor  of  inet_pton(3).   The following address families are currently
       supported:

       AF_INET
              src points to a character  string  containing  an  IPv4  network
              address  in  the  dotted-quad  format,  "ddd.ddd.ddd.ddd".   The
              address is converted to a struct  in_addr  and  copied  to  dst,
              which must be sizeof(struct in_addr) bytes long.

       AF_INET6
              src  points  to  a  character  string containing an IPv6 network
              address in any allowed IPv6 address format.  The address is con-
              verted  to  a  struct  in6_addr and copied to dst, which must be
              sizeof(struct in6_addr) bytes long.

       Certain legacy hex and octal formats of AF_INET addresses are not  sup-
       ported by inet_pton, which rejects them.

RETURN VALUE
       inet_pton returns a negative value and sets errno to EAFNOSUPPORT if af
       does not contain a valid address family.  0 is returned if src does not
       contain  a character string representing a valid network address in the
       specified address family.  A positive value is returned if the  network
       address was successfully converted.

SEE ALSO
       inet_ntop(3)

BUGS
       AF_INET6  does  not  recognize IPv4 addresses.  An explicit IPv6-mapped
       IPv4 address must be supplied in src instead.



Linux Man Page                    2000-12-18                      inet_pton(3)