platform: properly handle same routes in platform cacheth/platform-route-gateway

From kernels point of view, you can add a new routes as long as
there is no existing route that is exactly identical. That effectively
means, that every field of the route is part of the ID.

Currently, we handle that wrong, thus when kernel notifies platform
about two such routes, we would wrongly merge them together.
For example:

    ip link add dev0 type dummy
    ip link add dev1 type dummy
    ip link set dev0 up
    ip link set dev1 up
    ip addr add 192.168.200.4/24 dev dev0
    ip addr add 192.168.201.4/24 dev dev1

    ip route add    10.132.5.0/24 dev dev0
    ip route append 10.132.5.0/24 via 192.168.212.1 dev dev0
    ip route append 10.132.5.0/24 via 192.168.212.1 dev dev0 proto 5
    ip route show dev dev0

    ip route add    1:2:3:4:5::/64 via fe80::1:a dev dev0
    ip route append 1:2:3:4:5::/64 via fe80::1:b dev dev0
    ip route append 1:2:3:4:5::/64 via fe80::1:b dev dev0 proto 5
    ip -6 route show dev dev0

Note the difference here are the netlink flags:
  `ip route append`  (NLM_F_CREATE|NLM_F_APPEND)
  `ip route prepend` (NLM_F_CREATE)
  `ip route add`     (NLM_F_CREATE|NLM_F_EXCL)
  `ip route change`  (NLM_F_REPLACE)
  `ip route replace` (NLM_F_CREATE|NLM_F_REPLACE)

Extend platform to consider every property of a route to be part
of the ID. Also update the API like route_add(), route_get() and
route_delete() to accept full route structures as arguments.
For delete, that means you can only delete a route that you know
about. But that isn't really actually a problem.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/platform/nmp-object.h b/src/platform/nmp-object.h
index c5241037d5..95d7fab1c1 100644
--- a/src/platform/nmp-object.h
+++ b/src/platform/nmp-object.h
@@ -372,8 +372,8 @@ const NMPObject *nmp_object_stackinit_id  (NMPObject *obj, const NMPObject *src)
 const NMPObject *nmp_object_stackinit_id_link (NMPObject *obj, int ifindex);
 const NMPObject *nmp_object_stackinit_id_ip4_address (NMPObject *obj, int ifindex, guint32 address, guint8 plen, guint32 peer_address);
 const NMPObject *nmp_object_stackinit_id_ip6_address (NMPObject *obj, int ifindex, const struct in6_addr *address, guint8 plen);
-const NMPObject *nmp_object_stackinit_id_ip4_route (NMPObject *obj, int ifindex, guint32 network, guint8 plen, guint32 metric);
-const NMPObject *nmp_object_stackinit_id_ip6_route (NMPObject *obj, int ifindex, const struct in6_addr *network, guint8 plen, guint32 metric);
+const NMPObject *nmp_object_stackinit_id_ip4_route (NMPObject *obj, const NMPlatformIP4Route *route);
+const NMPObject *nmp_object_stackinit_id_ip6_route (NMPObject *obj, const NMPlatformIP6Route *route);
 
 const char *nmp_object_to_string (const NMPObject *obj, NMPObjectToStringMode to_string_mode, char *buf, gsize buf_size);
 int nmp_object_cmp (const NMPObject *obj1, const NMPObject *obj2);