Add PPPoE Plugin

Supports 64K PPPoE sessions

This plugin adds three graph nodes:
1) pppoe-input for PPPoE decapsulation
2) pppoe-encap for PPPoE encapsulation
3) pppoe-tap-dispatch for control plane process

Below is the configuration to make PPPoE CP and DP work:
vim /etc/vpp/startup.conf
tuntap {
  enable
  ethernet
  name newtap
}

create pppoe tap tap-if-index 1

//Configure it after a subscriber's PPPoE discovery and PPP link establishment succeeds:
create pppoe session client-ip 100.1.2.1 session-id 1 client-mac 00:11:01:00:00:01

show pppoe fib
show pppoe session

Change-Id: I73e724b6bf7c3e4181a9914c5752da1fa72d7e60
Signed-off-by: Hongjun Ni <hongjun.ni@intel.com>

1 files changed, 89 insertions, 0 deletions

diff --git a/src/plugins/pppoe/pppoe_tap.c b/src/plugins/pppoe/pppoe_tap.c
new file mode 100644
index 00000000000..60cdaafbad0
--- /dev/null
+++ b/src/plugins/pppoe/pppoe_tap.c
@@ -0,0 +1,89 @@
+/*
+ *------------------------------------------------------------------
+ * Copyright (c) 2017 Intel 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 <pppoe/pppoe.h>
+#include <vnet/unix/tapcli.h>
+
+static clib_error_t *
+pppoe_add_del_tap_command_fn (vlib_main_t * vm,
+			      unformat_input_t * input,
+			      vlib_cli_command_t * cmd)
+{
+  unformat_input_t _line_input, *line_input = &_line_input;
+  pppoe_main_t *pem = &pppoe_main;
+  u8 is_add = 1;
+  u8 tap_if_index_set = 0;
+  u32 tap_if_index = 0;
+  clib_error_t *error = NULL;
+
+  /* Get a line of input. */
+  if (!unformat_user (input, unformat_line_input, line_input))
+    return 0;
+
+  while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+    {
+      if (unformat (line_input, "del"))
+	{
+	  is_add = 0;
+	}
+      else if (unformat (line_input, "tap-if-index %d", &tap_if_index))
+	tap_if_index_set = 1;
+      else
+	{
+	  error = clib_error_return (0, "parse error: '%U'",
+				     format_unformat_error, line_input);
+	  goto done;
+	}
+    }
+
+  if (tap_if_index_set == 0)
+    {
+      error = clib_error_return (0, "tap if index not specified");
+      goto done;
+    }
+
+  if (is_add)
+    {
+      pem->tap_if_index = tap_if_index;
+    }
+  else
+    {
+      pem->tap_if_index = ~0;
+    }
+
+done:
+  unformat_free (line_input);
+
+  return error;
+}
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (create_pppoe_tap_cmd, static) =
+{
+    .path = "create pppoe tap",
+    .short_help = "create pppoe tap if-name <intfc> [del]",
+    .function = pppoe_add_del_tap_command_fn,
+};
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */