inet6_opt_set_val man page on DigitalUNIX

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inet6_opt_set_val(3)					  inet6_opt_set_val(3)

       inet6_opt_set_val - Insert data items into the data portion of the IPv6

       #include <netinet/ip6.h>

       int inet6_opt_set_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_append().  Specifies the location in
       the data portion of the option into which to insert the data.  You  can
       access  the  first  byte after the option type and length by specifying
       the offset of 0 (zero).	Points to the data to be inserted.   Specifies
       the length of the data, in bytes, to be inserted.

       The  inet6_opt_set_val() function copies data items at the location val
       into a data buffer databuf beginning at offset. In addition, it returns
       the  offset  for the next data field to assist you in composing content
       that has multiple fields.

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

       Upon successful completion, the	inet6_opt_set_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_get_val(3), inet6_opt_init(3), inet6_opt_next(3).

       Network Programmer's Guide


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