NAME    [Toc]    [Back]

       inet6_opt_next - Parse received option extension headers

SYNOPSIS    [Toc]    [Back]

       #include <netinet/ip6.h>

       int inet6_opt_next(
               void *extbuf,
               size_t extlen,
               int prevlen,
               uint8_t *typep,
               size_t *lenp,
               void **databufp );

LIBRARY    [Toc]    [Back]

       Standard C Library (libc)

PARAMETERS    [Toc]    [Back]

       Points  to  a  buffer  that  contains an extension header.
       Specifies the length, in bytes, of the  extension  header.
       Specifies  the  location  in  the  extension  header of an
       option. Valid values are either 0  (zero)  for  the  first
       option  or  the  length  returned  from a previous call to
       either inet6_opt_next() or  inet6_opt_find().   Points  to
       the type of the option found.  Points to the length of the
       option found.  Points to the option data.

DESCRIPTION    [Toc]    [Back]

       The inet6_opt_next() function  parses  a  received  option
       extension header and returns the next option. In addition,
       it returns an offset to the next option that  you  specify
       in   the   prevlen   parameter   to  subsequent  calls  to
       inet6_opt_next().

       This function does not return any PAD1 or PADN options.

RETURN VALUES    [Toc]    [Back]

       Upon successful completion, the inet6_opt_next()  function
       returns the offset for the next option in the data buffer.
       Upon failure, it returns a -1.

SEE ALSO    [Toc]    [Back]

       Functions:     inet6_opt_append(3),     inet6_opt_find(3),
       inet6_opt_finish(3),                 inet6_opt_get_val(3),
       inet6_opt_init(3), inet6_opt_set_val(3).

       Network Programmer's Guide



                                                inet6_opt_next(3)