[BZ #4181]

[BZ #4181]

2007-03-15  Jakub Jelinek  <jakub@redhat.com>
	[BZ #4181]
	* inet/inet6_opt.c (add_padding): Only insert padding if npad > 0.
	(inet6_opt_append): Don't check extlen is big enough if extbuf
	is NULL.
	(inet6_opt_finish): Likewise.
	* inet/Makefile (tests): Add test-inet6_opt.
	* inet/test-inet6_opt.c: New test.

	* sysdeps/unix/sysv/linux/ifaddrs.c (__netlink_request): Never
	reallocate the buffer, instead fail for MSG_TRUNC or for EBUSY
	NLMSG_ERR.  Instead use a page sized buffer.
	* sysdeps/unix/sysv/linux/check_pf.c (make_request): Use page sized
	buffer.