srv6-mobile: Support GTP4/6.DT and User Plane message mapping

Support the following new features in srv6-mobile.

1. GTP4.DT
2. GTP6.DT
3. User Plane Message encoding based on draft-murakami-dmm-user-plane-message-encoding-01
4. Add SRv6 mobile test cases

Type: feature

Signed-off-by: Tetsuya Murakami <tetsuya.mrk@gmail.com>
Change-Id: I890e5171bf03513d54b4830f01b9dc7f47fe7c48
Signed-off-by: Tetsuya Murakami <tetsuya.mrk@gmail.com>

1 files changed, 205 insertions, 0 deletions

diff --git a/src/plugins/srv6-mobile/gtp4_dt.c b/src/plugins/srv6-mobile/gtp4_dt.c
new file mode 100644
index 00000000000..44a4af34c2f
--- /dev/null
+++ b/src/plugins/srv6-mobile/gtp4_dt.c
@@ -0,0 +1,205 @@
+/*
+ * srv6_t_m_gtp4_dt.c
+ *
+ * Copyright (c) 2019 Arrcus Inc 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/adj/adj.h>
+#include <vnet/fib/fib_table.h>
+#include <vnet/plugin/plugin.h>
+#include <vpp/app/version.h>
+#include <srv6-mobile/mobile.h>
+
+srv6_t_main_v4_dt_t srv6_t_main_v4_dt;
+
+static void
+clb_dpo_lock_srv6_t_m_gtp4_dt (dpo_id_t * dpo)
+{
+}
+
+static void
+clb_dpo_unlock_srv6_t_m_gtp4_dt (dpo_id_t * dpo)
+{
+}
+
+static u8 *
+clb_dpo_format_srv6_t_m_gtp4_dt (u8 * s, va_list * args)
+{
+  index_t index = va_arg (*args, index_t);
+  CLIB_UNUSED (u32 indent) = va_arg (*args, u32);
+
+  return (format (s, "SR: dynamic_proxy_index:[%u]", index));
+}
+
+const static dpo_vft_t dpo_vft = {
+  .dv_lock = clb_dpo_lock_srv6_t_m_gtp4_dt,
+  .dv_unlock = clb_dpo_unlock_srv6_t_m_gtp4_dt,
+  .dv_format = clb_dpo_format_srv6_t_m_gtp4_dt,
+};
+
+const static char *const srv6_t_m_gtp4_dt_nodes[] = {
+  "srv6-t-m-gtp4-dt",
+  NULL,
+};
+
+const static char *const srv6_t_m_gtp4_dt_v6_nodes[] = {
+  "error-drop",
+  NULL,
+};
+
+const static char *const *const dpo_nodes[DPO_PROTO_NUM] = {
+  [DPO_PROTO_IP6] = srv6_t_m_gtp4_dt_v6_nodes,
+  [DPO_PROTO_IP4] = srv6_t_m_gtp4_dt_nodes,
+};
+
+static u8 fn_name[] = "SRv6-T.M.GTP4.DT-plugin";
+static u8 keyword_str[] = "t.m.gtp4.dt";
+static u8 def_str[] = "Transit function with DT for IPv4/GTP tunnel";
+static u8 param_str[] = "fib-index <index> [local-fib-table <index>]";
+
+static u8 *
+clb_format_srv6_t_m_gtp4_dt (u8 * s, va_list * args)
+{
+  srv6_t_gtp4_dt_param_t *ls_mem = va_arg (*args, void *);
+
+  s = format (s, "SRv6 Transit gtp4.dt\n\t");
+
+  if (ls_mem->type == SRV6_GTP4_DT4)
+    s = format (s, " Type GTP4.DT4 fib-table %u\n", ls_mem->fib4_index);
+  else if (ls_mem->type == SRV6_GTP4_DT6)
+    s = format (s, " Type GTP4.DT6, fib-table %u, local-fib-table %u\n",
+		ls_mem->fib6_index, ls_mem->local_fib_index);
+  else if (ls_mem->type == SRV6_GTP4_DT46)
+    s = format (s, " Type GTP4.DT46, fib-table %u, local-fib-table %u\n",
+		ls_mem->fib6_index, ls_mem->local_fib_index);
+  else
+    s = format (s, "\n");
+
+  return s;
+}
+
+static uword
+clb_unformat_srv6_t_m_gtp4_dt (unformat_input_t * input, va_list * args)
+{
+  void **plugin_mem_p = va_arg (*args, void **);
+  srv6_t_gtp4_dt_param_t *ls_mem;
+  u32 fib_index = 0;
+  u32 local_fib_index = 0;
+  u32 type;
+
+  if (unformat (input, "t.m.gtp4.dt4 fib-table %u", &fib_index))
+    {
+      type = SRV6_GTP4_DT4;
+    }
+  else if (unformat (input, "t.m.gtp4.dt6 fib-table %u local-fib-table %u",
+		     &fib_index, &local_fib_index))
+    {
+      type = SRV6_GTP4_DT6;
+    }
+  else if (unformat (input, "t.m.gtp4.dt46 fib-table %u local-fib-table %u",
+		     &fib_index, &local_fib_index))
+    {
+      type = SRV6_GTP4_DT46;
+    }
+  else
+    {
+      return 0;
+    }
+
+  ls_mem = clib_mem_alloc_aligned_at_offset (sizeof *ls_mem, 0, 0, 1);
+  clib_memset (ls_mem, 0, sizeof *ls_mem);
+  *plugin_mem_p = ls_mem;
+
+  ls_mem->fib4_index = fib_table_find (FIB_PROTOCOL_IP4, fib_index);
+  ls_mem->fib6_index = fib_table_find (FIB_PROTOCOL_IP6, fib_index);
+
+  if (type == SRV6_GTP4_DT6 || type == SRV6_GTP4_DT46)
+    {
+      ls_mem->local_fib_index =
+	fib_table_find (FIB_PROTOCOL_IP6, local_fib_index);
+    }
+
+  ls_mem->type = type;
+
+  return 1;
+}
+
+static int
+clb_creation_srv6_t_m_gtp4_dt (ip6_sr_policy_t * sr_policy)
+{
+  return 0;
+}
+
+static int
+clb_removal_srv6_t_m_gtp4_dt (ip6_sr_policy_t * sr_policy)
+{
+  srv6_t_gtp4_dt_param_t *ls_mem;
+
+  ls_mem = (srv6_t_gtp4_dt_param_t *) sr_policy->plugin_mem;
+
+  clib_mem_free (ls_mem);
+
+  return 0;
+}
+
+static clib_error_t *
+srv6_t_m_gtp4_dt_init (vlib_main_t * vm)
+{
+  srv6_t_main_v4_dt_t *sm = &srv6_t_main_v4_dt;
+  dpo_type_t dpo_type;
+  vlib_node_t *node;
+  int rc;
+
+  sm->vlib_main = vm;
+  sm->vnet_main = vnet_get_main ();
+
+  node = vlib_get_node_by_name (vm, (u8 *) "srv6-t-m-gtp4-dt");
+  sm->t_m_gtp4_dt_node_index = node->index;
+
+  node = vlib_get_node_by_name (vm, (u8 *) "error-drop");
+  sm->error_node_index = node->index;
+
+  dpo_type = dpo_register_new_type (&dpo_vft, dpo_nodes);
+
+  rc = sr_policy_register_function (vm, fn_name, keyword_str, def_str, param_str, 128,	//prefix len
+				    &dpo_type,
+				    clb_format_srv6_t_m_gtp4_dt,
+				    clb_unformat_srv6_t_m_gtp4_dt,
+				    clb_creation_srv6_t_m_gtp4_dt,
+				    clb_removal_srv6_t_m_gtp4_dt);
+  if (rc < 0)
+    clib_error_return (0, "SRv6 Transit GTP4.DT Policy function"
+		       "couldn't be registered");
+  return 0;
+}
+
+/* *INDENT-OFF* */
+VNET_FEATURE_INIT (srv6_t_m_gtp4_dt, static) =
+{
+  .arc_name = "ip4-unicast",
+  .node_name = "srv6-t-m-gtp4-dt",
+  .runs_before = 0,
+};
+
+VLIB_INIT_FUNCTION (srv6_t_m_gtp4_dt_init);
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */