sr: SRv6 uN behavior

Implements the uN behavior

Type: feature

Change-Id: Icb5efc560e09052cd183b468772cf7f799f81194
Signed-off-by: pcamaril <pcamaril@cisco.com>

1 files changed, 185 insertions, 0 deletions

diff --git a/src/plugins/srv6-un/un.c b/src/plugins/srv6-un/un.c
new file mode 100644
index 00000000000..7fd02e2c934
--- /dev/null
+++ b/src/plugins/srv6-un/un.c
@@ -0,0 +1,185 @@
+/*
+ * Copyright (c) 2015 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.
+ */
+/*
+ *------------------------------------------------------------------
+ * un.c - SRv6 Masquerading Proxy (AM) function
+ *------------------------------------------------------------------
+ */
+
+#include <vnet/vnet.h>
+#include <vnet/adj/adj.h>
+#include <vnet/plugin/plugin.h>
+#include <vpp/app/version.h>
+#include <srv6-un/un.h>
+
+unsigned char function_name[] = "SRv6-uN";
+unsigned char keyword_str[] = "uN(32b+16b)";
+unsigned char def_str[] = "SRv6 uSID uN";
+unsigned char params_str[] = "";
+u8 prefix_length = 48;
+
+srv6_un_main_t srv6_un_main;
+
+/*****************************************/
+/* SRv6 LocalSID instantiation and removal functions */
+static int
+srv6_un_localsid_creation_fn (ip6_sr_localsid_t * localsid)
+{
+  srv6_un_localsid_t *ls_mem = localsid->plugin_mem;
+  //Nothing to do here.
+  ls_mem->shift = 16;
+  return 0;
+}
+
+static int
+srv6_un_localsid_removal_fn (ip6_sr_localsid_t * localsid)
+{
+  //Nothing to do here.
+
+  /* Clean up local SID memory */
+  clib_mem_free (localsid->plugin_mem);
+
+  return 0;
+}
+
+/**********************************/
+/* SRv6 LocalSID format functions */
+/*
+ * Prints nicely the parameters of a localsid
+ * Example: print "Table 5"
+ */
+u8 *
+format_srv6_un_localsid (u8 * s, va_list * args)
+{
+  srv6_un_localsid_t *ls_mem = va_arg (*args, void *);
+
+  return (format (s, "Shift:\t\t%u", ls_mem->shift));
+}
+
+/*
+ * Process the parameters of a localsid
+ * Example: process from:
+ * sr localsid address cafe::1 behavior new_srv6_localsid 5
+ * everything from behavior on... so in this case 'new_srv6_localsid 5'
+ * Notice that it MUST match the keyword_str and params_str defined above.
+ */
+uword
+unformat_srv6_un_localsid (unformat_input_t * input, va_list * args)
+{
+  void **plugin_mem_p = va_arg (*args, void **);
+  srv6_un_localsid_t *ls_mem;
+
+  if (unformat (input, "uN(32b+16b)"))
+    {
+      /* Allocate a portion of memory */
+      ls_mem = clib_mem_alloc_aligned_at_offset (sizeof *ls_mem, 0, 0, 1);
+
+      /* Set to zero the memory */
+      clib_memset (ls_mem, 0, sizeof *ls_mem);
+
+      /* Dont forget to add it to the localsid */
+      *plugin_mem_p = ls_mem;
+      return 1;
+    }
+  return 0;
+}
+
+/*************************/
+/* SRv6 LocalSID FIB DPO */
+static u8 *
+format_srv6_un_dpo (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: shift-and-forward 16b:[%u]", index));
+}
+
+void
+srv6_un_dpo_lock (dpo_id_t * dpo)
+{
+}
+
+void
+srv6_un_dpo_unlock (dpo_id_t * dpo)
+{
+}
+
+const static dpo_vft_t srv6_un_vft = {
+  .dv_lock = srv6_un_dpo_lock,
+  .dv_unlock = srv6_un_dpo_unlock,
+  .dv_format = format_srv6_un_dpo,
+};
+
+const static char *const srv6_un_ip6_nodes[] = {
+  "srv6-un-localsid",
+  NULL,
+};
+
+const static char *const *const srv6_un_nodes[DPO_PROTO_NUM] = {
+  [DPO_PROTO_IP6] = srv6_un_ip6_nodes,
+};
+
+/**********************/
+static clib_error_t *
+srv6_un_init (vlib_main_t * vm)
+{
+  srv6_un_main_t *sm = &srv6_un_main;
+  int rv = 0;
+
+  sm->vlib_main = vm;
+  sm->vnet_main = vnet_get_main ();
+
+  /* Create DPO */
+  sm->srv6_un16_dpo_type =
+    dpo_register_new_type (&srv6_un_vft, srv6_un_nodes);
+
+  /* Register SRv6 LocalSID */
+  rv = sr_localsid_register_function (vm,
+				      function_name,
+				      keyword_str,
+				      def_str,
+				      params_str,
+				      prefix_length,
+				      &sm->srv6_un16_dpo_type,
+				      format_srv6_un_localsid,
+				      unformat_srv6_un_localsid,
+				      srv6_un_localsid_creation_fn,
+				      srv6_un_localsid_removal_fn);
+  if (rv < 0)
+    clib_error_return (0, "SRv6 LocalSID function could not be registered.");
+  else
+    sm->srv6_localsid_behavior_id = rv;
+
+  return 0;
+}
+
+
+/* *INDENT-OFF* */
+VLIB_INIT_FUNCTION (srv6_un_init);
+
+VLIB_PLUGIN_REGISTER () = {
+  .version = VPP_BUILD_VER,
+  .description = "Segment Routing Shift And Forward uN 16b",
+};
+/* *INDENT-ON* */
+
+/*
+* fd.io coding-style-patch-verification: ON
+*
+* Local Variables:
+* eval: (c-set-style "gnu")
+* End:
+*/