Why TUNSETLINK to ARPHRD_6LOWPAN

[alexaring]

Hi,

do you have a good reason why setting the interface type to ARPHRD_6LOWPAN if defined?
In case of Linux, do you use any feature which is provided by the in-kernel 6LoWPAN feature?
@mcr and I currently try to solve some issues inside the kernel do deal with this tun feature and probably like to disallow to change to this type which ends in a -ENOTSUPP or something else.

wpantund/src/util/tunnel.c

Lines 180 to 186 in 86d29d6

	#if defined(TUNSETLINK) && defined(ARPHRD_6LOWPAN)
	int val = ARPHRD_6LOWPAN;
	if (ioctl(fd, TUNSETLINK, (unsigned long) val) < 0) {
	perror("TUNSETLINK");
	}
	#endif

Alex