Index for Section 3

Alphabetical listing for I

Bottom of page

inet6_opt_next(3)
NAME
  inet6_opt_next - Parse received option extension headers

SYNOPSIS
  #include <netinet/ip6.h>

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

LIBRARY
  Standard C Library (libc)

PARAMETERS
  extbuf
      Points to a buffer that contains an extension header.

  extlen
      Specifies the length, in bytes, of the extension header.

  prevlen
      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().

  typep
      Points to the type of the option found.

  lenp
      Points to the length of the option found.

  databufp
      Points to the option data.

DESCRIPTION
  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
  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
  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

Index for Section 3

Alphabetical listing for I

Top of page