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inet6_opt_find(3)
NAME
  inet6_opt_find - Find a specific option in an extension header

SYNOPSIS
  #include <netinet/ip6.h>

  int inet6_opt_find(
	  void *extbuf,
	  size_t extlen,
	  int prevlen,
	  uint8_t type,
	  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().

  type
      Specifies the type of option to find.

  lenp
      Points to the length of the option found.

  databufp
      Points to the option data.

DESCRIPTION
  The inet6_opt_find() function searches a received option extension header
  for an option specified by type.  If it finds the specified option, it
  returns the option length and a pointer to the option data. In addition, it
  returns an offset to the next option that you specify in the prevlen
  parameter to subsequent calls to inet6_opt_next() in order to search for
  additional occurrences of the same option type.

RETURN VALUES
  Upon successful completion, the inet6_opt_find() function returns an offset
  from which you can begin the next search in the data buffer. Upon failure,
  it returns a -1.

SEE ALSO
  Functions: inet6_opt_append(3), inet6_opt_finish(3), inet6_opt_get_val(3),
  inet6_opt_init(3), inet6_opt_next(3), inet6_opt_set_val(3).

  Network Programmer's Guide

Index for Section 3

Alphabetical listing for I

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