L3 cross connect

- all packets input on interface X are load-balanced over the set of
paths provided.

Change-Id: Ic27cb88c4cd5d6d3462570632daff7a43d5a652d
Signed-off-by: Neale Ranns <nranns@cisco.com>

1 files changed, 296 insertions, 0 deletions

diff --git a/src/plugins/l3xc/l3xc_api.c b/src/plugins/l3xc/l3xc_api.c
new file mode 100644
index 00000000000..45c01fa4e7a
--- /dev/null
+++ b/src/plugins/l3xc/l3xc_api.c
@@ -0,0 +1,296 @@
+/*
+ * 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/vnet.h>
+#include <vnet/plugin/plugin.h>
+#include <l3xc/l3xc.h>
+#include <vnet/mpls/mpls_types.h>
+#include <vnet/fib/fib_path_list.h>
+#include <vnet/fib/fib_api.h>
+
+#include <vpp/app/version.h>
+
+#include <vlibapi/api.h>
+#include <vlibmemory/api.h>
+
+/* define message IDs */
+#include <l3xc/l3xc_msg_enum.h>
+
+/* define message structures */
+#define vl_typedefs
+#include <l3xc/l3xc_all_api_h.h>
+#undef vl_typedefs
+
+/* define generated endian-swappers */
+#define vl_endianfun
+#include <l3xc/l3xc_all_api_h.h>
+#undef vl_endianfun
+
+/* instantiate all the print functions we know about */
+#define vl_print(handle, ...) vlib_cli_output (handle, __VA_ARGS__)
+#define vl_printfun
+#include <l3xc/l3xc_all_api_h.h>
+#undef vl_printfun
+
+/* Get the API version number */
+#define vl_api_version(n,v) static u32 api_version=(v);
+#include <l3xc/l3xc_all_api_h.h>
+#undef vl_api_version
+
+/**
+ * Base message ID fot the plugin
+ */
+static u32 l3xc_base_msg_id;
+
+#include <vlibapi/api_helper_macros.h>
+
+/* List of message types that this plugin understands */
+
+#define foreach_l3xc_plugin_api_msg                     \
+  _(L3XC_PLUGIN_GET_VERSION, l3xc_plugin_get_version)   \
+  _(L3XC_UPDATE, l3xc_update)                           \
+  _(L3XC_DEL, l3xc_del)                                 \
+  _(L3XC_DUMP, l3xc_dump)
+
+static void
+vl_api_l3xc_plugin_get_version_t_handler (vl_api_l3xc_plugin_get_version_t *
+					  mp)
+{
+  vl_api_l3xc_plugin_get_version_reply_t *rmp;
+  vl_api_registration_t *rp;
+
+  rp = vl_api_client_index_to_registration (mp->client_index);
+  if (rp == 0)
+    return;
+
+  rmp = vl_msg_api_alloc (sizeof (*rmp));
+  rmp->_vl_msg_id =
+    ntohs (VL_API_L3XC_PLUGIN_GET_VERSION_REPLY + l3xc_base_msg_id);
+  rmp->context = mp->context;
+  rmp->major = htonl (L3XC_PLUGIN_VERSION_MAJOR);
+  rmp->minor = htonl (L3XC_PLUGIN_VERSION_MINOR);
+
+  vl_api_send_msg (rp, (u8 *) rmp);
+}
+
+static void
+vl_api_l3xc_update_t_handler (vl_api_l3xc_update_t * mp)
+{
+  vl_api_l3xc_update_reply_t *rmp;
+  fib_route_path_t *paths = NULL, *path;
+  int rv = 0;
+  u8 pi;
+
+  VALIDATE_SW_IF_INDEX (&mp->l3xc);
+
+  if (0 == mp->l3xc.n_paths)
+    {
+      rv = VNET_API_ERROR_INVALID_VALUE;
+      goto done;
+    }
+
+  vec_validate (paths, mp->l3xc.n_paths - 1);
+
+  for (pi = 0; pi < mp->l3xc.n_paths; pi++)
+    {
+      path = &paths[pi];
+      rv = fib_path_api_parse (&mp->l3xc.paths[pi], path);
+
+      if (0 != rv)
+	{
+	  goto done;
+	}
+    }
+
+  rv = l3xc_update (ntohl (mp->l3xc.sw_if_index), mp->l3xc.is_ip6, paths);
+
+done:
+  vec_free (paths);
+
+  BAD_SW_IF_INDEX_LABEL;
+
+  /* *INDENT-OFF* */
+  REPLY_MACRO2 (VL_API_L3XC_UPDATE_REPLY + l3xc_base_msg_id,
+  ({
+    rmp->stats_index = 0;
+  }))
+  /* *INDENT-ON* */
+}
+
+static void
+vl_api_l3xc_del_t_handler (vl_api_l3xc_del_t * mp)
+{
+  vl_api_l3xc_del_reply_t *rmp;
+  int rv = 0;
+
+  VALIDATE_SW_IF_INDEX (mp);
+
+  rv = l3xc_delete (ntohl (mp->sw_if_index), mp->is_ip6);
+
+  BAD_SW_IF_INDEX_LABEL;
+
+  REPLY_MACRO (VL_API_L3XC_DEL_REPLY + l3xc_base_msg_id);
+}
+
+typedef struct l3xc_dump_walk_ctx_t_
+{
+  vl_api_registration_t *rp;
+  u32 context;
+} l3xc_dump_walk_ctx_t;
+
+static int
+l3xc_send_details (u32 l3xci, void *args)
+{
+  fib_route_path_encode_t *api_rpaths = NULL, *api_rpath;
+  vl_api_l3xc_details_t *mp;
+  l3xc_dump_walk_ctx_t *ctx;
+  vl_api_fib_path_t *fp;
+  size_t msg_size;
+  l3xc_t *l3xc;
+  u8 n_paths;
+
+  ctx = args;
+  l3xc = l3xc_get (l3xci);
+  n_paths = fib_path_list_get_n_paths (l3xc->l3xc_pl);
+  msg_size = sizeof (*mp) + sizeof (mp->l3xc.paths[0]) * n_paths;
+
+  mp = vl_msg_api_alloc (msg_size);
+  clib_memset (mp, 0, msg_size);
+  mp->_vl_msg_id = ntohs (VL_API_L3XC_DETAILS + l3xc_base_msg_id);
+
+  /* fill in the message */
+  mp->context = ctx->context;
+  mp->l3xc.n_paths = n_paths;
+  mp->l3xc.sw_if_index = htonl (l3xc->l3xc_sw_if_index);
+
+  fib_path_list_walk_w_ext (l3xc->l3xc_pl, NULL, fib_path_encode,
+			    &api_rpaths);
+
+  fp = mp->l3xc.paths;
+  vec_foreach (api_rpath, api_rpaths)
+  {
+    fib_api_path_encode (api_rpath, fp);
+    fp++;
+  }
+
+  vl_api_send_msg (ctx->rp, (u8 *) mp);
+
+  return (1);
+}
+
+static void
+vl_api_l3xc_dump_t_handler (vl_api_l3xc_dump_t * mp)
+{
+  vl_api_registration_t *rp;
+  u32 sw_if_index;
+
+  rp = vl_api_client_index_to_registration (mp->client_index);
+  if (rp == 0)
+    return;
+
+  l3xc_dump_walk_ctx_t ctx = {
+    .rp = rp,
+    .context = mp->context,
+  };
+
+  sw_if_index = ntohl (mp->sw_if_index);
+
+  if (~0 == sw_if_index)
+    l3xc_walk (l3xc_send_details, &ctx);
+  else
+    {
+      fib_protocol_t fproto;
+      index_t l3xci;
+
+      FOR_EACH_FIB_IP_PROTOCOL (fproto)
+      {
+	l3xci = l3xc_find (sw_if_index, fproto);
+
+	if (INDEX_INVALID != l3xci)
+	  l3xc_send_details (l3xci, &ctx);
+      }
+    }
+}
+
+#define vl_msg_name_crc_list
+#include <l3xc/l3xc_all_api_h.h>
+#undef vl_msg_name_crc_list
+
+/* Set up the API message handling tables */
+static clib_error_t *
+l3xc_plugin_api_hookup (vlib_main_t * vm)
+{
+#define _(N,n)                                                  \
+    vl_msg_api_set_handlers((VL_API_##N + l3xc_base_msg_id),     \
+                            #n,					\
+                            vl_api_##n##_t_handler,             \
+                            vl_noop_handler,                    \
+                            vl_api_##n##_t_endian,              \
+                            vl_api_##n##_t_print,               \
+                            sizeof(vl_api_##n##_t), 1);
+  foreach_l3xc_plugin_api_msg;
+#undef _
+
+  return 0;
+}
+
+static void
+setup_message_id_table (api_main_t * apim)
+{
+#define _(id,n,crc) \
+  vl_msg_api_add_msg_name_crc (apim, #n "_" #crc, id + l3xc_base_msg_id);
+  foreach_vl_msg_name_crc_l3xc;
+#undef _
+}
+
+static clib_error_t *
+l3xc_api_init (vlib_main_t * vm)
+{
+  clib_error_t *error = 0;
+
+  u8 *name = format (0, "l3xc_%08x%c", api_version, 0);
+
+  /* Ask for a correctly-sized block of API message decode slots */
+  l3xc_base_msg_id = vl_msg_api_get_msg_ids ((char *) name,
+					     VL_MSG_FIRST_AVAILABLE);
+
+  error = l3xc_plugin_api_hookup (vm);
+
+  /* Add our API messages to the global name_crc hash table */
+  setup_message_id_table (&api_main);
+
+  vec_free (name);
+
+  return error;
+}
+
+VLIB_INIT_FUNCTION (l3xc_api_init);
+
+/* *INDENT-OFF* */
+VLIB_PLUGIN_REGISTER () = {
+    .version = VPP_BUILD_VER,
+    .description = "L3 Cross-Connect (L3XC)",
+};
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */