inet6_opt_finish(3)inet6_opt_finish(3)NAMEinet6_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
Points to a buffer that contains an extension header. This is either a
valid pointer or a NULL pointer. Specifies the length of the extension
header to finish initializing. A valid value is any number greater than
or equal to 0. 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 extenâ
sion 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
inet6_opt_finish(3)