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inet6_opt_get_val(3)
NAME
  inet6_opt_get_val - Extract data items from the data portion of an IPv6
  option

SYNOPSIS
  #include <netinet/ip6.h>

  int inet6_opt_get_val(
	  void *databuf,
	  size_t offset,
	  void *val,
	  int vallen );

LIBRARY
  Standard C Library (libc)

PARAMETERS
  databuf
      Points to a buffer that contains an extension header. This is a pointer
      returned by a call to inet6_opt_find() or inet6_opt_next().

  offset
      Specifies the location in the data portion of the option from which to
      extract the data. You can access the first byte after the option type
      and length by specifying the offset of 0 (zero).

  val Points to a destination for the extracted data.

  vallen
      Specifies the length of the data, in bytes, to be extracted.

DESCRIPTION
  The inet6_opt_get_val() function copies data items from data buffer databuf
  beginning at offset to the location val. In addition, it returns the offset
  for the next data field to assist you in extracting option content that has
  multiple fields.

  Make sure that each field is aligned on its natural boundaries.

RETURN VALUES
  Upon successful completion, the inet6_opt_get_val() function returns the
  offset for the next field 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_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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