inet6_opt_get_val man page on DigitalUNIX

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inet6_opt_get_val(3)					  inet6_opt_get_val(3)

       inet6_opt_get_val - Extract data items from the data portion of an IPv6

       #include <netinet/ip6.h>

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

       Standard C Library (libc)

       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().  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).  Points to	a  destination
       for the extracted data.	Specifies the length of the data, in bytes, to
       be extracted.

       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.

       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.

       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


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