diff options
Diffstat (limited to 'src/plugins/cdp/cdp.c')
| -rw-r--r-- | src/plugins/cdp/cdp.c | 222 |
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: + */ |