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, 190 insertions, 0 deletions

diff --git a/src/vnet/arp/arp_api.c b/src/vnet/arp/arp_api.c
new file mode 100644
index 00000000000..170bace2b0a
--- /dev/null
+++ b/src/vnet/arp/arp_api.c
@@ -0,0 +1,190 @@
+/*
+ * Copyright (c) 2016 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 <stddef.h>
+
+#include <vnet/arp/arp.h>
+
+#include <vnet/fib/fib_table.h>
+#include <vnet/ip/ip_types_api.h>
+
+#include <vpp/app/version.h>
+
+#include <vlibapi/api.h>
+#include <vlibmemory/api.h>
+
+/* define message IDs */
+#include <vnet/format_fns.h>
+#include <vnet/arp/arp.api_enum.h>
+#include <vnet/arp/arp.api_types.h>
+
+/**
+ * Base message ID fot the plugin
+ */
+static u32 arp_base_msg_id;
+#define REPLY_MSG_ID_BASE arp_base_msg_id
+
+#include <vlibapi/api_helper_macros.h>
+
+static void
+vl_api_proxy_arp_add_del_t_handler (vl_api_proxy_arp_add_del_t * mp)
+{
+  vl_api_proxy_arp_add_del_reply_t *rmp;
+  ip4_address_t lo, hi;
+  u32 fib_index;
+  int rv;
+
+  fib_index = fib_table_find (FIB_PROTOCOL_IP4, ntohl (mp->proxy.table_id));
+
+  if (~0 == fib_index)
+    {
+      rv = VNET_API_ERROR_NO_SUCH_FIB;
+      goto out;
+    }
+
+  ip4_address_decode (mp->proxy.low, &lo);
+  ip4_address_decode (mp->proxy.hi, &hi);
+
+  if (mp->is_add)
+    rv = arp_proxy_add (fib_index, &lo, &hi);
+  else
+    rv = arp_proxy_del (fib_index, &lo, &hi);
+
+out:
+  REPLY_MACRO (VL_API_PROXY_ARP_ADD_DEL_REPLY);
+}
+
+typedef struct proxy_arp_walk_ctx_t_
+{
+  vl_api_registration_t *reg;
+  u32 context;
+} proxy_arp_walk_ctx_t;
+
+static walk_rc_t
+send_proxy_arp_details (const ip4_address_t * lo_addr,
+			const ip4_address_t * hi_addr,
+			u32 fib_index, void *data)
+{
+  vl_api_proxy_arp_details_t *mp;
+  proxy_arp_walk_ctx_t *ctx;
+
+  ctx = data;
+
+  mp = vl_msg_api_alloc (sizeof (*mp));
+  clib_memset (mp, 0, sizeof (*mp));
+  mp->_vl_msg_id = ntohs (VL_API_PROXY_ARP_DETAILS + REPLY_MSG_ID_BASE);
+  mp->context = ctx->context;
+  mp->proxy.table_id = htonl (fib_index);
+
+  ip4_address_encode (lo_addr, mp->proxy.low);
+  ip4_address_encode (hi_addr, mp->proxy.hi);
+
+  vl_api_send_msg (ctx->reg, (u8 *) mp);
+
+  return (WALK_CONTINUE);
+}
+
+static void
+vl_api_proxy_arp_dump_t_handler (vl_api_proxy_arp_dump_t * mp)
+{
+  vl_api_registration_t *reg;
+
+  reg = vl_api_client_index_to_registration (mp->client_index);
+  if (!reg)
+    return;
+
+  proxy_arp_walk_ctx_t wctx = {
+    .reg = reg,
+    .context = mp->context,
+  };
+
+  proxy_arp_walk (send_proxy_arp_details, &wctx);
+}
+
+static walk_rc_t
+send_proxy_arp_intfc_details (u32 sw_if_index, void *data)
+{
+  vl_api_proxy_arp_intfc_details_t *mp;
+  proxy_arp_walk_ctx_t *ctx;
+
+  ctx = data;
+
+  mp = vl_msg_api_alloc (sizeof (*mp));
+  clib_memset (mp, 0, sizeof (*mp));
+  mp->_vl_msg_id = ntohs (VL_API_PROXY_ARP_INTFC_DETAILS + REPLY_MSG_ID_BASE);
+  mp->context = ctx->context;
+  mp->sw_if_index = htonl (sw_if_index);
+
+  vl_api_send_msg (ctx->reg, (u8 *) mp);
+
+  return (WALK_CONTINUE);
+}
+
+static void
+vl_api_proxy_arp_intfc_dump_t_handler (vl_api_proxy_arp_intfc_dump_t * mp)
+{
+  vl_api_registration_t *reg;
+
+  reg = vl_api_client_index_to_registration (mp->client_index);
+  if (!reg)
+    return;
+
+  proxy_arp_walk_ctx_t wctx = {
+    .reg = reg,
+    .context = mp->context,
+  };
+
+  proxy_arp_intfc_walk (send_proxy_arp_intfc_details, &wctx);
+}
+
+static void
+  vl_api_proxy_arp_intfc_enable_disable_t_handler
+  (vl_api_proxy_arp_intfc_enable_disable_t * mp)
+{
+  vl_api_proxy_arp_intfc_enable_disable_reply_t *rmp;
+  int rv;
+
+  VALIDATE_SW_IF_INDEX (mp);
+
+  if (mp->enable)
+    rv = arp_proxy_enable (ntohl (mp->sw_if_index));
+  else
+    rv = arp_proxy_disable (ntohl (mp->sw_if_index));
+
+  BAD_SW_IF_INDEX_LABEL;
+
+  REPLY_MACRO (VL_API_PROXY_ARP_INTFC_ENABLE_DISABLE_REPLY);
+}
+
+#include <vnet/arp/arp.api.c>
+
+static clib_error_t *
+arp_api_init (vlib_main_t * vm)
+{
+  /* Ask for a correctly-sized block of API message decode slots */
+  arp_base_msg_id = setup_message_id_table ();
+
+  return 0;
+}
+
+VLIB_INIT_FUNCTION (arp_api_init);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */