ip: Protocol Independent IP Neighbors

Type: feature

 - ip-neighbour: generic neighbour handling; APIs, DBs, event handling,
aging
 - arp: ARP protocol implementation
 - ip6-nd; IPv6 neighbor discovery implementation; separate ND,
MLD, RA
 - ip6-link; manage link-local addresses
 - l2-arp-term; events separated from IP neighbours, since they are not
the same.

vnet retains just enough education to perform ND/ARP packet
construction.
arp and ip6-nd to be moved to plugins soon.

Change-Id: I88dedd0006b299344f4c7024a0aa5baa6b9a8bbe
Signed-off-by: Neale Ranns <nranns@cisco.com>

1 files changed, 76 insertions, 0 deletions

diff --git a/src/vnet/ip/ip46_address.c b/src/vnet/ip/ip46_address.c
new file mode 100644
index 00000000000..184392e036d
--- /dev/null
+++ b/src/vnet/ip/ip46_address.c
@@ -0,0 +1,76 @@
+/*
+ * Copyright (c) 2015-2019 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <vnet/ip/ip46_address.h>
+
+u8 *
+format_ip46_type (u8 * s, va_list * args)
+{
+  ip46_type_t type = va_arg (*args, ip46_type_t);
+
+  switch (type)
+    {
+    case IP46_TYPE_IP4:
+      return (format (s, "ip4"));
+    case IP46_TYPE_IP6:
+      return (format (s, "ip6"));
+    case IP46_TYPE_ANY:
+      return (format (s, "any"));
+    }
+
+  return (format (s, "unknown"));
+}
+
+void
+ip4_address_increment (ip4_address_t * i)
+{
+  u32 t = clib_net_to_host_u32 (i->as_u32);
+  t++;
+  i->as_u32 = clib_net_to_host_u32 (t);
+}
+
+void
+ip6_address_increment (ip6_address_t * i)
+{
+  u64 tmp = clib_net_to_host_u64 (i->as_u64[1]);
+
+  tmp++;
+  i->as_u64[1] = clib_host_to_net_u64 (tmp);
+
+  if (!tmp)
+    {
+      tmp = clib_net_to_host_u64 (i->as_u64[0]);
+      tmp++;
+      i->as_u64[0] = clib_host_to_net_u64 (tmp);
+    }
+}
+
+void
+ip46_address_increment (ip46_type_t type, ip46_address_t * ip)
+{
+  if (IP46_TYPE_IP4 == type ||
+      (IP46_TYPE_ANY == type && ip46_address_is_ip4 (ip)))
+    ip4_address_increment (&ip->ip4);
+  else
+    ip6_address_increment (&ip->ip6);
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */