SR-MPLS: binary API and automated steering

Change-Id: Iacfbaaa91ea8bd92790dec9fce567063bdbc5d64
Signed-off-by: Pablo Camarillo <pcamaril@cisco.com>

1 files changed, 228 insertions, 0 deletions

diff --git a/src/vnet/srmpls/sr_mpls_api.c b/src/vnet/srmpls/sr_mpls_api.c
new file mode 100644
index 00000000000..a6294e391b6
--- /dev/null
+++ b/src/vnet/srmpls/sr_mpls_api.c
@@ -0,0 +1,228 @@
+/*
+ * ------------------------------------------------------------------
+ * sr_api.c - ipv6 segment routing api
+ *
+ * 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 <vnet/vnet.h>
+#include <vnet/srmpls/sr_mpls.h>
+#include <vlibmemory/api.h>
+
+#include <vnet/interface.h>
+#include <vnet/api_errno.h>
+#include <vnet/feature/feature.h>
+
+#include <vnet/vnet_msg_enum.h>
+
+#define vl_typedefs		/* define message structures */
+#include <vnet/vnet_all_api_h.h>
+#undef vl_typedefs
+
+#define vl_endianfun		/* define message structures */
+#include <vnet/vnet_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 <vnet/vnet_all_api_h.h>
+#undef vl_printfun
+
+#include <vlibapi/api_helper_macros.h>
+
+#define foreach_vpe_api_msg                             \
+_(SR_MPLS_POLICY_DEL, sr_mpls_policy_del)                         \
+_(SR_MPLS_STEERING_ADD_DEL, sr_mpls_steering_add_del)             \
+_(SR_MPLS_POLICY_ASSIGN_ENDPOINT_COLOR, sr_mpls_policy_assign_endpoint_color)
+
+
+static void
+vl_api_sr_mpls_policy_add_t_handler (vl_api_sr_mpls_policy_add_t * mp)
+{
+  vl_api_sr_mpls_policy_add_reply_t *rmp;
+
+  mpls_label_t *segments = 0, *seg;
+  mpls_label_t this_address = 0;
+
+  int i;
+  for (i = 0; i < mp->n_segments; i++)
+    {
+      vec_add2 (segments, seg, 1);
+      this_address = ntohl (mp->segments[i]);
+      clib_memcpy (seg, &this_address, sizeof (this_address));
+    }
+
+  int rv = 0;
+  rv = sr_mpls_policy_add (ntohl (mp->bsid),
+			   segments, mp->type, ntohl (mp->weight));
+
+  REPLY_MACRO (VL_API_SR_MPLS_POLICY_ADD_REPLY);
+}
+
+static void
+vl_api_sr_mpls_policy_mod_t_handler (vl_api_sr_mpls_policy_mod_t * mp)
+{
+  vl_api_sr_mpls_policy_mod_reply_t *rmp;
+
+  mpls_label_t *segments = 0, *seg;
+  mpls_label_t this_address = 0;
+
+  int i;
+  for (i = 0; i < mp->n_segments; i++)
+    {
+      vec_add2 (segments, seg, 1);
+      this_address = ntohl (mp->segments[i]);
+      clib_memcpy (seg, &this_address, sizeof (this_address));
+    }
+
+  int rv = 0;
+  rv = sr_mpls_policy_mod (ntohl (mp->bsid),
+			   mp->operation, segments, ntohl (mp->sl_index),
+			   ntohl (mp->weight));
+
+  REPLY_MACRO (VL_API_SR_MPLS_POLICY_MOD_REPLY);
+}
+
+static void
+vl_api_sr_mpls_policy_del_t_handler (vl_api_sr_mpls_policy_del_t * mp)
+{
+  vl_api_sr_mpls_policy_del_reply_t *rmp;
+  int rv = 0;
+  rv = sr_mpls_policy_del (ntohl (mp->bsid));
+
+  REPLY_MACRO (VL_API_SR_MPLS_POLICY_DEL_REPLY);
+}
+
+static void vl_api_sr_mpls_steering_add_del_t_handler
+  (vl_api_sr_mpls_steering_add_del_t * mp)
+{
+  vl_api_sr_mpls_steering_add_del_reply_t *rmp;
+  ip46_address_t prefix;
+  memset (&prefix, 0, sizeof (ip46_address_t));
+  if (mp->traffic_type == SR_STEER_IPV4)
+    memcpy (&prefix.ip4, mp->prefix_addr, sizeof (prefix.ip4));
+  else
+    memcpy (&prefix, mp->prefix_addr, sizeof (prefix.ip6));
+
+  int rv = 0;
+  if (mp->is_del)
+    rv = sr_mpls_steering_policy_del (&prefix,
+				      ntohl (mp->mask_width),
+				      mp->traffic_type,
+				      ntohl (mp->table_id),
+				      ntohl (mp->color));
+  else
+    rv = sr_mpls_steering_policy_add (ntohl (mp->bsid),
+				      ntohl (mp->table_id),
+				      &prefix,
+				      ntohl (mp->mask_width),
+				      mp->traffic_type,
+				      (ip46_address_t *) & mp->next_hop,
+				      mp->nh_type,
+				      ntohl (mp->color), mp->co_bits,
+				      ntohl (mp->vpn_label));
+
+  REPLY_MACRO (VL_API_SR_MPLS_STEERING_ADD_DEL_REPLY);
+}
+
+static void vl_api_sr_mpls_policy_assign_endpoint_color_t_handler
+  (vl_api_sr_mpls_policy_assign_endpoint_color_t * mp)
+{
+  vl_api_sr_mpls_policy_assign_endpoint_color_reply_t *rmp;
+  int rv = 0;
+
+  ip46_address_t endpoint;
+  memset (&endpoint, 0, sizeof (ip46_address_t));
+  if (mp->endpoint_type == SR_STEER_IPV4)
+    memcpy (&endpoint.ip4, mp->endpoint, sizeof (endpoint.ip4));
+  else
+    memcpy (&endpoint, mp->endpoint, sizeof (endpoint.ip6));
+
+  rv = sr_mpls_policy_assign_endpoint_color (ntohl (mp->bsid),
+					     &endpoint, mp->endpoint_type,
+					     ntohl (mp->color));
+
+  REPLY_MACRO (VL_API_SR_MPLS_POLICY_ASSIGN_ENDPOINT_COLOR_REPLY);
+}
+
+/*
+ * sr_mpls_api_hookup Add vpe's API message handlers to the table. vlib has
+ * alread mapped shared memory and added the client registration handlers.
+ * See .../vlib-api/vlibmemory/memclnt_vlib.c:memclnt_process()
+ */
+#define vl_msg_name_crc_list
+#include <vnet/vnet_all_api_h.h>
+#undef vl_msg_name_crc_list
+
+static void
+setup_message_id_table (api_main_t * am)
+{
+#define _(id,n,crc) vl_msg_api_add_msg_name_crc (am, #n "_" #crc, id);
+  foreach_vl_msg_name_crc_sr_mpls;
+#undef _
+}
+
+static clib_error_t *
+sr_mpls_api_hookup (vlib_main_t * vm)
+{
+  api_main_t *am = &api_main;
+
+#define _(N,n)                                                  \
+    vl_msg_api_set_handlers(VL_API_##N, #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_vpe_api_msg;
+#undef _
+
+  /*
+   * Manually register the sr policy add msg, so we trace enough bytes
+   * to capture a typical segment list
+   */
+  vl_msg_api_set_handlers (VL_API_SR_MPLS_POLICY_ADD,
+			   "sr_mpls_policy_add",
+			   vl_api_sr_mpls_policy_add_t_handler,
+			   vl_noop_handler,
+			   vl_api_sr_mpls_policy_add_t_endian,
+			   vl_api_sr_mpls_policy_add_t_print, 256, 1);
+
+  /*
+   * Manually register the sr policy mod msg, so we trace enough bytes
+   * to capture a typical segment list
+   */
+  vl_msg_api_set_handlers (VL_API_SR_MPLS_POLICY_MOD,
+			   "sr_mpls_policy_mod",
+			   vl_api_sr_mpls_policy_mod_t_handler,
+			   vl_noop_handler,
+			   vl_api_sr_mpls_policy_mod_t_endian,
+			   vl_api_sr_mpls_policy_mod_t_print, 256, 1);
+
+  /*
+   * Set up the (msg_name, crc, message-id) table
+   */
+  setup_message_id_table (am);
+
+  return 0;
+}
+
+VLIB_API_INIT_FUNCTION (sr_mpls_api_hookup);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables: eval: (c-set-style "gnu") End:
+ */