ip: Protocol Independent IP Neighbors

[vpp.git] / src / vnet / ip6-nd / ip6_nd_proxy.c

diff --git a/src/vnet/ip6-nd/ip6_nd_proxy.c b/src/vnet/ip6-nd/ip6_nd_proxy.c
new file mode 100644 (file)
index 0000000..110847f
--- /dev/null
+++ b/src/vnet/ip6-nd/ip6_nd_proxy.c
@@ -0,0 +1,127 @@
+/*
+ * ip/ip6_neighbor.c: IP6 neighbor handling
+ *
+ * Copyright (c) 2010 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/ip6-nd/ip6_nd.h>
+#include <vnet/ip-neighbor/ip_neighbor.h>
+
+#include <vnet/fib/ip6_fib.h>
+
+static int
+ip6_nd_proxy_add_del (u32 sw_if_index, const ip6_address_t * addr, u8 is_del)
+{
+  /* *INDENT-OFF* */
+  u32 fib_index;
+  fib_prefix_t pfx = {
+    .fp_len = 128,
+    .fp_proto = FIB_PROTOCOL_IP6,
+    .fp_addr = {
+      .ip6 = *addr,
+    },
+  };
+  ip46_address_t nh = {
+    .ip6 = *addr,
+  };
+  /* *INDENT-ON* */
+
+  fib_index = ip6_fib_table_get_index_for_sw_if_index (sw_if_index);
+
+  if (~0 == fib_index)
+    return VNET_API_ERROR_NO_SUCH_FIB;
+
+  if (is_del)
+    {
+      fib_table_entry_path_remove (fib_index,
+                                  &pfx,
+                                  FIB_SOURCE_IP6_ND_PROXY,
+                                  DPO_PROTO_IP6,
+                                  &nh,
+                                  sw_if_index,
+                                  ~0, 1, FIB_ROUTE_PATH_FLAG_NONE);
+      /* flush the ND cache of this address if it's there */
+      ip_neighbor_del (&nh, IP46_TYPE_IP6, sw_if_index);
+    }
+  else
+    {
+      fib_table_entry_path_add (fib_index,
+                               &pfx,
+                               FIB_SOURCE_IP6_ND_PROXY,
+                               FIB_ENTRY_FLAG_NONE,
+                               DPO_PROTO_IP6,
+                               &nh,
+                               sw_if_index,
+                               ~0, 1, NULL, FIB_ROUTE_PATH_FLAG_NONE);
+    }
+  return (0);
+}
+
+int
+ip6_nd_proxy_add (u32 sw_if_index, const ip6_address_t * addr)
+{
+  return (ip6_nd_proxy_add_del (sw_if_index, addr, 0));
+}
+
+int
+ip6_nd_proxy_del (u32 sw_if_index, const ip6_address_t * addr)
+{
+  return (ip6_nd_proxy_add_del (sw_if_index, addr, 1));
+}
+
+static clib_error_t *
+set_ip6_nd_proxy_cmd (vlib_main_t * vm,
+                     unformat_input_t * input, vlib_cli_command_t * cmd)
+{
+  vnet_main_t *vnm = vnet_get_main ();
+  clib_error_t *error = 0;
+  ip6_address_t addr;
+  u32 sw_if_index;
+  u8 is_del = 0;
+
+  if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
+    {
+      /* get the rest of the command */
+      while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+       {
+         if (unformat (input, "%U", unformat_ip6_address, &addr))
+           break;
+         else if (unformat (input, "delete") || unformat (input, "del"))
+           is_del = 1;
+         else
+           return (unformat_parse_error (input));
+       }
+    }
+
+  ip6_nd_proxy_add_del (sw_if_index, &addr, is_del);
+
+  return error;
+}
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (set_ip6_nd_proxy_command, static) =
+{
+  .path = "set ip6 nd proxy",
+  .short_help = "set ip6 nd proxy <HOST> <INTERFACE>",
+  .function = set_ip6_nd_proxy_cmd,
+};
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */