local.m4: Replacing IPv6 host routes with /112 networks.

Linux has a bug: it doesn't make route cache entries for remote hosts
if there's already a host route, and it only attaches path-MTU
information to cache entries.  The result is that it doesn't handle
ICMPv6 `packet too big' messages properly for destinations with host
routes.

I'm bodging this by replacing all of the host routes with tiny /112
networks.  It's awful, but it seems to work.  The convention is that
the `host part' of the net is always zero.

diff --git a/local.m4 b/local.m4
index 3c4a5f6c67b8efdf66030d8f4d67a5c8943df7db..c617520d9045aae0f7dfdf1002dd010124a077f6 100644 (file)
--- a/local.m4
+++ b/local.m4
@@ -243,9 +243,9 @@ defnet sgo noloop
 defnet vpn safe
        addr 172.29.199.128/27 2001:ba8:1d9:6000::/64
        via househub colohub
 defnet vpn safe
        addr 172.29.199.128/27 2001:ba8:1d9:6000::/64
        via househub colohub

-       host crybaby 1
-       host terror 2
-       host orange 3
+       host crybaby 1 ::1:0
+       host terror 2 ::2:0
+       host orange 3 ::3:0

 defnet anycast trusted
        addr 172.29.199.224/27 2001:ba8:1d9:0::/64
        via dmz unsafe safe untrusted jump colo vpn
 defnet anycast trusted
        addr 172.29.199.224/27 2001:ba8:1d9:0::/64
        via dmz unsafe safe untrusted jump colo vpn