1 files changed, 106 insertions, 0 deletions
diff --git a/src/plugins/l2tp/pg.c b/src/plugins/l2tp/pg.c
new file mode 100644
index 00000000000..f8edb6908aa
--- /dev/null
+++ b/src/plugins/l2tp/pg.c
@@ -0,0 +1,106 @@
+/*
+ * pg.c: packet generator for L2TPv3 header
+ *
+ * Copyright (c) 2013 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 <vlib/vlib.h>
+#include <vnet/pg/pg.h>
+#include <l2tp/l2tp.h>
+
+typedef struct
+{
+  pg_edit_t session_id;
+  pg_edit_t cookie;
+} pg_l2tp_header_t;
+
+typedef struct
+{
+  pg_edit_t l2_sublayer;
+} pg_l2tp_header_l2_sublayer_t;
+
+static inline void
+pg_l2tp_header_init (pg_l2tp_header_t * e)
+{
+  pg_edit_init (&e->session_id, l2tpv3_header_t, session_id);
+  pg_edit_init (&e->cookie, l2tpv3_header_t, cookie);
+}
+
+uword
+unformat_pg_l2tp_header (unformat_input_t * input, va_list * args)
+{
+  pg_stream_t *s = va_arg (*args, pg_stream_t *);
+  pg_l2tp_header_t *h;
+  u32 group_index, error;
+  vlib_main_t *vm = vlib_get_main ();
+
+  h = pg_create_edit_group (s, sizeof (h[0]),
+			    sizeof (l2tpv3_header_t) - sizeof (u32),
+			    &group_index);
+  pg_l2tp_header_init (h);
+
+  error = 1;
+
+  /* session id and cookie are required */
+  if (!unformat (input, "L2TP: session_id %U cookie %U",
+		 unformat_pg_edit, unformat_pg_number, &h->session_id,
+		 unformat_pg_edit, unformat_pg_number, &h->cookie))
+    {
+      goto done;
+    }
+
+  /* "l2_sublayer <value>" is optional */
+  if (unformat (input, "l2_sublayer"))
+    {
+      pg_l2tp_header_l2_sublayer_t *h2;
+
+      h2 = pg_add_edits (s, sizeof (h2[0]), sizeof (u32), group_index);
+      pg_edit_init (&h2->l2_sublayer, l2tpv3_header_t, l2_specific_sublayer);
+      if (!unformat_user (input, unformat_pg_edit,
+			  unformat_pg_number, &h2->l2_sublayer))
+	{
+	  goto done;
+	}
+    }
+
+  /* Parse an ethernet header if it is present */
+  {
+    pg_node_t *pg_node = 0;
+    vlib_node_t *eth_lookup_node;
+
+    eth_lookup_node = vlib_get_node_by_name (vm, (u8 *) "ethernet-input");
+    ASSERT (eth_lookup_node);
+
+    pg_node = pg_get_node (eth_lookup_node->index);
+
+    if (pg_node && pg_node->unformat_edit
+	&& unformat_user (input, pg_node->unformat_edit, s))
+      ;
+  }
+
+  error = 0;
+
+done:
+  if (error)
+    pg_free_edit_group (s);
+  return error == 0;
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */