/*
* 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:
*/
Mohsin Kazmi