Source VRF Select

match against a packet's source address to determine
the VRF for the subsequent destination address lookup.

Change-Id: I48ee0ef54dcb891f0ec7f879e4d3b925a0ed0081
Signed-off-by: Neale Ranns <nranns@cisco.com>

1 files changed, 276 insertions, 0 deletions

diff --git a/src/plugins/svs/svs_api.c b/src/plugins/svs/svs_api.c
new file mode 100644
index 00000000000..8bdafc286ff
--- /dev/null
+++ b/src/plugins/svs/svs_api.c
@@ -0,0 +1,276 @@
+/*
+ * Copyright (c) 2018 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 <svs/svs.h>
+#include <vnet/fib/fib_api.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 <svs/svs_msg_enum.h>
+
+/* define message structures */
+#define vl_typedefs
+#include <svs/svs_all_api_h.h>
+#undef vl_typedefs
+
+/* define generated endian-swappers */
+#define vl_endianfun
+#include <svs/svs_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 <svs/svs_all_api_h.h>
+#undef vl_printfun
+
+/* Get the API version number */
+#define vl_api_version(n,v) static u32 api_version=(v);
+#include <svs/svs_all_api_h.h>
+#undef vl_api_version
+
+/**
+ * Base message ID fot the plugin
+ */
+static u32 svs_base_msg_id;
+
+#include <vlibapi/api_helper_macros.h>
+
+/* List of message types that this plugin understands */
+
+#define foreach_svs_plugin_api_msg                    \
+  _(SVS_PLUGIN_GET_VERSION, svs_plugin_get_version)   \
+  _(SVS_TABLE_ADD_DEL, svs_table_add_del)             \
+  _(SVS_ROUTE_ADD_DEL, svs_route_add_del)             \
+  _(SVS_ENABLE_DISABLE, svs_enable_disable)           \
+  _(SVS_DUMP, svs_dump)
+
+static void
+vl_api_svs_plugin_get_version_t_handler (vl_api_svs_plugin_get_version_t * mp)
+{
+  vl_api_svs_plugin_get_version_reply_t *rmp;
+  int msg_size = sizeof (*rmp);
+  unix_shared_memory_queue_t *q;
+
+  q = vl_api_client_index_to_input_queue (mp->client_index);
+  if (q == 0)
+    {
+      return;
+    }
+
+  rmp = vl_msg_api_alloc (msg_size);
+  memset (rmp, 0, msg_size);
+  rmp->_vl_msg_id =
+    ntohs (VL_API_SVS_PLUGIN_GET_VERSION_REPLY + svs_base_msg_id);
+  rmp->context = mp->context;
+  rmp->major = htonl (SVS_PLUGIN_VERSION_MAJOR);
+  rmp->minor = htonl (SVS_PLUGIN_VERSION_MINOR);
+
+  vl_msg_api_send_shmem (q, (u8 *) & rmp);
+}
+
+static void
+vl_api_svs_table_add_del_t_handler (vl_api_svs_table_add_del_t * mp)
+{
+  vl_api_svs_table_add_del_reply_t *rmp;
+  fib_protocol_t fproto;
+  int rv = 0;
+
+  fproto = fib_proto_from_api_address_family (mp->af);
+
+  if (mp->is_add)
+    {
+      svs_table_add (fproto, ntohl (mp->table_id));
+    }
+  else
+    {
+      svs_table_delete (fproto, ntohl (mp->table_id));
+    }
+
+  REPLY_MACRO (VL_API_SVS_TABLE_ADD_DEL_REPLY + svs_base_msg_id);
+}
+
+static void
+vl_api_svs_route_add_del_t_handler (vl_api_svs_route_add_del_t * mp)
+{
+  vl_api_svs_route_add_del_reply_t *rmp;
+  fib_prefix_t pfx;
+  int rv = 0;
+
+  ip_prefix_decode (&mp->prefix, &pfx);
+
+  if (mp->is_add)
+    {
+      rv =
+	svs_route_add (ntohl (mp->table_id), &pfx,
+		       ntohl (mp->source_table_id));
+    }
+  else
+    {
+      rv = svs_route_delete (ntohl (mp->table_id), &pfx);
+    }
+
+  REPLY_MACRO (VL_API_SVS_ROUTE_ADD_DEL_REPLY + svs_base_msg_id);
+}
+
+static void
+vl_api_svs_enable_disable_t_handler (vl_api_svs_enable_disable_t * mp)
+{
+  vl_api_svs_enable_disable_reply_t *rmp;
+  fib_protocol_t fproto;
+  int rv = 0;
+
+  VALIDATE_SW_IF_INDEX (mp);
+
+  fproto = fib_proto_from_api_address_family (mp->af);
+
+  if (mp->is_enable)
+    {
+      svs_enable (fproto, ntohl (mp->table_id), ntohl (mp->sw_if_index));
+    }
+  else
+    {
+      svs_disable (fproto, ntohl (mp->table_id), ntohl (mp->sw_if_index));
+    }
+
+  BAD_SW_IF_INDEX_LABEL;
+  REPLY_MACRO (VL_API_SVS_ENABLE_DISABLE_REPLY + svs_base_msg_id);
+}
+
+typedef struct svs_dump_walk_ctx_t_
+{
+  unix_shared_memory_queue_t *q;
+  u32 context;
+} svs_dump_walk_ctx_t;
+
+
+static walk_rc_t
+svs_send_details (fib_protocol_t fproto,
+		  u32 table_id, u32 sw_if_index, void *args)
+{
+  vl_api_svs_details_t *mp;
+  svs_dump_walk_ctx_t *ctx;
+
+  ctx = args;
+
+  mp = vl_msg_api_alloc (sizeof (*mp));
+  mp->_vl_msg_id = ntohs (VL_API_SVS_DETAILS + svs_base_msg_id);
+
+  mp->context = ctx->context;
+  mp->sw_if_index = htonl (sw_if_index);
+  mp->table_id = htonl (table_id);
+  mp->af = fib_proto_to_api_address_family (fproto);
+
+  vl_msg_api_send_shmem (ctx->q, (u8 *) & mp);
+
+  return (WALK_CONTINUE);
+}
+
+static void
+vl_api_svs_dump_t_handler (vl_api_svs_dump_t * mp)
+{
+  unix_shared_memory_queue_t *q;
+
+  q = vl_api_client_index_to_input_queue (mp->client_index);
+  if (q == 0)
+    {
+      return;
+    }
+
+  svs_dump_walk_ctx_t ctx = {
+    .q = q,
+    .context = mp->context,
+  };
+
+  svs_walk (svs_send_details, &ctx);
+}
+
+#define vl_msg_name_crc_list
+#include <svs/svs_all_api_h.h>
+#undef vl_msg_name_crc_list
+
+/* Set up the API message handling tables */
+static clib_error_t *
+svs_plugin_api_hookup (vlib_main_t * vm)
+{
+#define _(N,n)                                                  \
+    vl_msg_api_set_handlers((VL_API_##N + svs_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_svs_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 + svs_base_msg_id);
+  foreach_vl_msg_name_crc_svs;
+#undef _
+}
+
+static clib_error_t *
+svs_api_init (vlib_main_t * vm)
+{
+  clib_error_t *error = 0;
+
+  u8 *name = format (0, "svs_%08x%c", api_version, 0);
+
+  /* Ask for a correctly-sized block of API message decode slots */
+  svs_base_msg_id = vl_msg_api_get_msg_ids ((char *) name,
+					    VL_MSG_FIRST_AVAILABLE);
+
+  error = svs_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 (svs_api_init);
+
+/* *INDENT-OFF* */
+VLIB_PLUGIN_REGISTER () = {
+    .version = VPP_BUILD_VER,
+    .description = "Source VRF Select",
+};
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */