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inet6_opt_finish(3)
NAME
  inet6_opt_finish - Return the total length of an IPv6 extension header,
  including padding, and initialize the option

SYNOPSIS
  #include <netinet/ip6.h>

  int inet6_opt_finish(
	  void *extbuf,
	  size_t extlen,
	  int prevlen );

LIBRARY
  Standard C Library (libc)

PARAMETERS
  extbuf
      Points to a buffer that contains an extension header. This is either a
      valid pointer or a NULL pointer.

  extlen
      Specifies the length of the extension header to finish initializing. A
      valid value is any number greater than or equal to 0.

  prevlen
      Specifies the length of the existing extension header. Obtain this
      value from a prior call to inet6_opt_init() or inet6_opt_append().

DESCRIPTION
  The inet6_opt_finish() function when called with extbuf as a NULL pointer
  and extlen as 0, returns the total number of bytes in an extension header,
  including final padding.

  If you specify extbuf as a valid pointer and a valid extlen parameter, the
  function returns the same information as in the previous case, increments
  the buffer pointer, and verifies that the buffer is large enough to hold
  the header.

RETURN VALUES
  Upon successful completion, the inet6_opt_finish() function returns the
  total number of bytes in an extension header, including padding. Upon
  failure, it returns a -1.

SEE ALSO
  Functions: inet6_opt_append(3), inet6_opt_find(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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