session: rules tables

This introduces 5-tuple lookup tables that may be used to implement
custom session layer actions at connection establishment time (session
layer perspective).

The rules table build mask-match-action lookup trees that for a given
5-tuple key return the action for the first longest match. If rules
overlap, ordering is established by tuple longest match with the
following descending priority: remote ip, local ip, remote port, local
port.

At this time, the only match action supported is to forward packets to
the application identified by the action.

Change-Id: Icbade6fac720fa3979820d50cd7d6137f8b635c3
Signed-off-by: Florin Coras <fcoras@cisco.com>

1 files changed, 32 insertions, 0 deletions

diff --git a/src/vnet/session/transport.c b/src/vnet/session/transport.c
index fc722e45668..c18cf15974e 100644
--- a/src/vnet/session/transport.c
+++ b/src/vnet/session/transport.c
@@ -42,6 +42,38 @@ static transport_endpoint_t *local_endpoints;
  */
 static clib_spinlock_t local_endpoints_lock;
 
+u8 *
+format_transport_proto (u8 * s, va_list * args)
+{
+  u32 transport_proto = va_arg (*args, u32);
+  switch (transport_proto)
+    {
+    case TRANSPORT_PROTO_TCP:
+      s = format (s, "TCP");
+      break;
+    case TRANSPORT_PROTO_UDP:
+      s = format (s, "UDP");
+      break;
+    }
+  return s;
+}
+
+uword
+unformat_transport_proto (unformat_input_t * input, va_list * args)
+{
+  u32 *proto = va_arg (*args, u32 *);
+  if (unformat (input, "tcp"))
+    *proto = TRANSPORT_PROTO_TCP;
+  else if (unformat (input, "TCP"))
+    *proto = TRANSPORT_PROTO_TCP;
+  else if (unformat (input, "udp"))
+    *proto = TRANSPORT_PROTO_UDP;
+  else if (unformat (input, "UDP"))
+    *proto = TRANSPORT_PROTO_UDP;
+  else
+    return 0;
+  return 1;
+}
 
 u32
 transport_endpoint_lookup (transport_endpoint_table_t * ht, u8 proto,