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authorDave Barach <dave@barachs.net>2018-03-10 14:57:00 -0500
committerDave Barach <dave@barachs.net>2018-03-10 15:27:58 -0500
commitaaacfbc5b15b0653489ad2e80db48151a4375ece (patch)
treecbe4228c1e674116563229e52bc5e9d73229b5af /src/plugins/cdp/cdp.c
parentfde0929d9362eac5c416f658e1d2031d01a02337 (diff)
Move the vnet cdp protocol implementation to a plugin
Add a binary API and debug cli to enable/disable cdp. cdp is disabled by default. Change-Id: I307c7e38dfda38e36ff3325f65de7036c34d89b1 Signed-off-by: Dave Barach <dave@barachs.net>
Diffstat (limited to 'src/plugins/cdp/cdp.c')
-rw-r--r--src/plugins/cdp/cdp.c222
1 files changed, 222 insertions, 0 deletions
diff --git a/src/plugins/cdp/cdp.c b/src/plugins/cdp/cdp.c
new file mode 100644
index 00000000000..a88a06bc9c5
--- /dev/null
+++ b/src/plugins/cdp/cdp.c
@@ -0,0 +1,222 @@
+/*
+ * cdp.c - cdp protocol plug-in
+ *
+ * Copyright (c) 2011-2018 by 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 <vnet/vnet.h>
+#include <vnet/plugin/plugin.h>
+#include <cdp/cdp.h>
+
+#include <vlibapi/api.h>
+#include <vlibmemory/api.h>
+#include <vpp/app/version.h>
+
+/* define message IDs */
+#include <cdp/cdp_msg_enum.h>
+
+/* define message structures */
+#define vl_typedefs
+#include <cdp/cdp_all_api_h.h>
+#undef vl_typedefs
+
+/* define generated endian-swappers */
+#define vl_endianfun
+#include <cdp/cdp_all_api_h.h>
+#undef vl_endianfun
+
+/* instantiate all the print functions we know about */
+#define vl_print(handle, ...) vlib_cli_output (handle, __VA_ARGS__)
+#define vl_printfun
+#include <cdp/cdp_all_api_h.h>
+#undef vl_printfun
+
+/* Get the API version number */
+#define vl_api_version(n,v) static u32 api_version=(v);
+#include <cdp/cdp_all_api_h.h>
+#undef vl_api_version
+
+/*
+ * A handy macro to set up a message reply.
+ * Assumes that the following variables are available:
+ * mp - pointer to request message
+ * rmp - pointer to reply message type
+ * rv - return value
+ */
+
+#define REPLY_MACRO(t) \
+do { \
+ unix_shared_memory_queue_t * q = \
+ vl_api_client_index_to_input_queue (mp->client_index); \
+ if (!q) \
+ return; \
+ \
+ rmp = vl_msg_api_alloc (sizeof (*rmp)); \
+ rmp->_vl_msg_id = ntohs((t)+cm->msg_id_base); \
+ rmp->context = mp->context; \
+ rmp->retval = ntohl(rv); \
+ \
+ vl_msg_api_send_shmem (q, (u8 *)&rmp); \
+} while(0);
+
+
+/* List of message types that this plugin understands */
+
+#define foreach_cdp_plugin_api_msg \
+_(CDP_ENABLE_DISABLE, cdp_enable_disable)
+
+/* Action function shared between message handler and debug CLI */
+
+int
+cdp_enable_disable (cdp_main_t * cm, int enable_disable)
+{
+ int rv = 0;
+
+ if (enable_disable)
+ vlib_process_signal_event (cm->vlib_main, cdp_process_node.index,
+ CDP_EVENT_ENABLE, 0);
+ else
+ vlib_process_signal_event (cm->vlib_main, cdp_process_node.index,
+ CDP_EVENT_DISABLE, 0);
+ cm->enabled = enable_disable;
+
+ return rv;
+}
+
+static clib_error_t *
+cdp_command_fn (vlib_main_t * vm,
+ unformat_input_t * input, vlib_cli_command_t * cmd)
+{
+ cdp_main_t *cm = &cdp_main;
+ int enable_disable = 1;
+
+ int rv;
+
+ while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (input, "disable"))
+ enable_disable = 0;
+ else if (unformat (input, "enable"))
+ enable_disable = 1;
+ else
+ break;
+ }
+
+ rv = cdp_enable_disable (cm, enable_disable);
+
+ switch (rv)
+ {
+ case 0:
+ break;
+
+ default:
+ return clib_error_return (0, "cdp_enable_disable returned %d", rv);
+ }
+ return 0;
+}
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (cdp_command, static) =
+{
+ .path = "cdp",
+ .short_help = "cdp enable | disable",
+ .function = cdp_command_fn,
+};
+/* *INDENT-ON* */
+
+/* API message handler */
+static void vl_api_cdp_enable_disable_t_handler
+ (vl_api_cdp_enable_disable_t * mp)
+{
+ vl_api_cdp_enable_disable_reply_t *rmp;
+ cdp_main_t *cm = &cdp_main;
+ int rv;
+
+ rv = cdp_enable_disable (cm, (int) (mp->enable_disable));
+
+ REPLY_MACRO (VL_API_CDP_ENABLE_DISABLE_REPLY);
+}
+
+/* Set up the API message handling tables */
+static clib_error_t *
+cdp_plugin_api_hookup (vlib_main_t * vm)
+{
+ cdp_main_t *cm = &cdp_main;
+#define _(N,n) \
+ vl_msg_api_set_handlers((VL_API_##N + cm->msg_id_base), \
+ #n, \
+ vl_api_##n##_t_handler, \
+ vl_noop_handler, \
+ vl_api_##n##_t_endian, \
+ vl_api_##n##_t_print, \
+ sizeof(vl_api_##n##_t), 1);
+ foreach_cdp_plugin_api_msg;
+#undef _
+
+ return 0;
+}
+
+#define vl_msg_name_crc_list
+#include <cdp/cdp_all_api_h.h>
+#undef vl_msg_name_crc_list
+
+static void
+setup_message_id_table (cdp_main_t * cm, api_main_t * am)
+{
+#define _(id,n,crc) vl_msg_api_add_msg_name_crc (am, #n #crc, id + cm->msg_id_base);
+ foreach_vl_msg_name_crc_cdp;
+#undef _
+}
+
+static clib_error_t *
+cdp_init (vlib_main_t * vm)
+{
+ cdp_main_t *cm = &cdp_main;
+ clib_error_t *error = 0;
+ u8 *name;
+
+ cm->vlib_main = vm;
+
+ name = format (0, "cdp_%08x%c", api_version, 0);
+
+ /* Ask for a correctly-sized block of API message decode slots */
+ cm->msg_id_base = vl_msg_api_get_msg_ids
+ ((char *) name, VL_MSG_FIRST_AVAILABLE);
+
+ error = cdp_plugin_api_hookup (vm);
+
+ /* Add our API messages to the global name_crc hash table */
+ setup_message_id_table (cm, &api_main);
+
+ vec_free (name);
+
+ return error;
+}
+
+VLIB_INIT_FUNCTION (cdp_init);
+
+/* *INDENT-OFF* */
+VLIB_PLUGIN_REGISTER () =
+{
+ .version = VPP_BUILD_VER,
+};
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */