tipc: add 128-bit node identifier

We add a 128-bit node identity, as an alternative to the currently used
32-bit node address.

For the sake of compatibility and to minimize message header changes
we retain the existing 32-bit address field. When not set explicitly by
the user, this field will be filled with a hash value generated from the
much longer node identity, and be used as a shorthand value for the
latter.

We permit either the address or the identity to be set by configuration,
but not both, so when the address value is set by a legacy user the
corresponding 128-bit node identity is generated based on the that value.

Acked-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 1 deletions

diff --git a/net/tipc/core.c b/net/tipc/core.c
index 04fd91bb11d7..e92fed49e095 100644
--- a/net/tipc/core.c
+++ b/net/tipc/core.c
@@ -56,7 +56,9 @@ static int __net_init tipc_init_net(struct net *net)
         int err;
 
         tn->net_id = 4711;
-        tn->own_addr = 0;
+        tn->node_addr = 0;
+        memset(tn->node_id, 0, sizeof(tn->node_id));
+        memset(tn->node_id_string, 0, sizeof(tn->node_id_string));
         tn->mon_threshold = TIPC_DEF_MON_THRESHOLD;
         get_random_bytes(&tn->random, sizeof(int));
         INIT_LIST_HEAD(&tn->node_list);