/* * 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: */