xroutes generated from local addresses are missing v4mapped src_prefix

[fblaese]

Routes imported from kernel had an incorrectely set src_prefix/src_plen before the issue was fixed in 68b6c5e

Just like it, src_prefix/src_plen isn't encoded properly for routes generated from local addresses.

This leads to issues if the same route/address is announced by multiple babeld nodes, as the route generated locally and the route received from a neighbour are not equal internally.

[fblaese]

local addresses are imported from kernel as addresses, so the v4 mapping of src_prefix/src_plen cannot be done like it is done with prefix in kernel_netlink.c:

babeld/kernel_netlink.c

Line 1359 in d42c1db

v4tov6(res->s6_addr, RTA_DATA(rta));

The addresses are converted to routes in filter_address() inside xroute.c, where plen is set to 128 (correct for both v4 and v6):

babeld/xroute.c

Lines 278 to 283 in d42c1db

	route = &routes[*found];
	memcpy(route->prefix, addr->addr.s6_addr, 16);
	route->plen = 128;
	route->metric = 0;
	route->ifindex = addr->ifindex;
	route->proto = RTPROT_BABEL_LOCAL;

[dtaht]

I think I might be seeing this...

[jech]

Fixed in 079bea9.