1 files changed, 77 insertions, 0 deletions
diff --git a/src/vnet/gre/pg.c b/src/vnet/gre/pg.c
new file mode 100644
index 00000000..cc065d3b
--- /dev/null
+++ b/src/vnet/gre/pg.c
@@ -0,0 +1,77 @@
+/*
+ * hdlc_pg.c: packet generator gre interface
+ *
+ * Copyright (c) 2012 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 <vnet/gre/gre.h>
+
+typedef struct {
+  pg_edit_t flags_and_version;
+  pg_edit_t protocol;
+} pg_gre_header_t;
+
+static inline void
+pg_gre_header_init (pg_gre_header_t * e)
+{
+  pg_edit_init (&e->flags_and_version, gre_header_t, flags_and_version);
+  pg_edit_init (&e->protocol, gre_header_t, protocol);
+}
+
+uword
+unformat_pg_gre_header (unformat_input_t * input, va_list * args)
+{
+  pg_stream_t * s = va_arg (*args, pg_stream_t *);
+  pg_gre_header_t * h;
+  u32 group_index, error;
+  
+  h = pg_create_edit_group (s, sizeof (h[0]), sizeof (gre_header_t),
+			    &group_index);
+  pg_gre_header_init (h);
+
+  pg_edit_set_fixed (&h->flags_and_version, 0);
+
+  error = 1;
+  if (! unformat (input, "%U",
+		  unformat_pg_edit,
+                  unformat_gre_protocol_net_byte_order, &h->protocol))
+    goto done;
+
+  {
+    gre_main_t * pm = &gre_main;
+    gre_protocol_info_t * pi = 0;
+    pg_node_t * pg_node = 0;
+
+    if (h->protocol.type == PG_EDIT_FIXED)
+      {
+	u16 t = *(u16 *) h->protocol.values[PG_EDIT_LO];
+	pi = gre_get_protocol_info (pm, clib_net_to_host_u16 (t));
+	if (pi && pi->node_index != ~0)
+	  pg_node = pg_get_node (pi->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;
+}
+