hosts.lisp: 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/hosts.lisp b/hosts.lisp
index 881ad01..7c3383e 100644 (file)
--- a/hosts.lisp
+++ b/hosts.lisp
@@ -103,9 +103,9 @@
 (defhost vampire.untrusted (untrusted 3))
 
 ;; Virtual private network.
-(defhost crybaby.vpn (vpn 1))
+(defhost crybaby.vpn ((:ipv4 vpn 1) (:ipv6 vpn "::1:0")))
 (defhost terror.vpn ((:ipv4 vpn 2)))
-(defhost orange.vpn (vpn 3))
+(defhost orange.vpn ((:ipv4 vpn 3) (:ipv6 vpn "::3:0")))
 
 ;; Iodine network.
 (defhost jazz.iodine (iodine 1))
@@ -123,13 +123,13 @@
 (defhost jazz.colo (colo 5))
 
 ;; Anycast addresses for services.
-(defhost dns0.any (any 0))
-(defhost dns1.any (any 1))
-(defhost ntp0.any (any 2))
-(defhost ntp1.any (any 3))
-(defhost www-cache.any (any 4))
-(defhost krb0.any (any 5))
-(defhost krb1.any (any 6))
+(defhost dns0.any ((:ipv4 any 0) (:ipv6 any "::0:0")))
+(defhost dns1.any ((:ipv4 any 1) (:ipv6 any "::1:0")))
+(defhost ntp0.any ((:ipv4 any 2) (:ipv6 any "::2:0")))
+(defhost ntp1.any ((:ipv4 any 3) (:ipv6 any "::3:0")))
+(defhost www-cache.any ((:ipv4 any 4) (:ipv6 any "::4:0")))
+(defhost krb0.any ((:ipv4 any 5) (:ipv6 any "::5:0")))
+(defhost krb1.any ((:ipv4 any 6) (:ipv6 any "::6:0")))
 
 ;;;--------------------------------------------------------------------------
 ;;; Host switch.