feature_api.c

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/*
 *------------------------------------------------------------------
 * feature_api.c - vnet feature api
 *
 * Copyright (c) 2016 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 <vlibmemory/api.h>
#include <vnet/feature/feature.h>

#include <vnet/vnet_msg_enum.h>

#define vl_typedefs             /* define message structures */
#include <vnet/vnet_all_api_h.h>
#undef vl_typedefs

#define vl_endianfun            /* define message structures */
#include <vnet/vnet_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 <vnet/vnet_all_api_h.h>
#undef vl_printfun

#include <vlibapi/api_helper_macros.h>

#define foreach_feature_api_msg                                              \
_(FEATURE_ENABLE_DISABLE, feature_enable_disable)

static void
vl_api_feature_enable_disable_t_handler (vl_api_feature_enable_disable_t * mp)
{
  vl_api_feature_enable_disable_reply_t *rmp;
  int rv = 0;

  VALIDATE_SW_IF_INDEX (mp);

  u8 *arc_name = format (0, "%s%c", mp->arc_name, 0);
  u8 *feature_name = format (0, "%s%c", mp->feature_name, 0);

  vec_terminate_c_string (arc_name);
  vec_terminate_c_string (feature_name);

  vnet_feature_registration_t *reg =
    vnet_get_feature_reg ((const char *) arc_name,
                          (const char *) feature_name);
  if (reg == 0)
    rv = VNET_API_ERROR_INVALID_VALUE;
  else
    {
      u32 sw_if_index = ntohl (mp->sw_if_index);
      clib_error_t *error = 0;

      if (reg->enable_disable_cb)
        error = reg->enable_disable_cb (sw_if_index, mp->enable);
      if (!error)
        vnet_feature_enable_disable ((const char *) arc_name,
                                     (const char *) feature_name,
                                     sw_if_index, mp->enable, 0, 0);
      else
        {
          clib_error_report (error);
          rv = VNET_API_ERROR_CANNOT_ENABLE_DISABLE_FEATURE;
        }
    }

  vec_free (feature_name);
  vec_free (arc_name);

  BAD_SW_IF_INDEX_LABEL;

  REPLY_MACRO (VL_API_FEATURE_ENABLE_DISABLE_REPLY);
}

#define vl_msg_name_crc_list
#include <vnet/feature/feature.api.h>
#undef vl_msg_name_crc_list

static void
setup_message_id_table (api_main_t * am)
{
#define _(id,n,crc) vl_msg_api_add_msg_name_crc (am, #n "_" #crc, id);
  foreach_vl_msg_name_crc_feature;
#undef _
}

static clib_error_t *
feature_api_hookup (vlib_main_t * vm)
{
  api_main_t *am = vlibapi_get_main ();

#define _(N,n)                                                  \
    vl_msg_api_set_handlers(VL_API_##N, #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_feature_api_msg;
#undef _

  /*
   * Set up the (msg_name, crc, message-id) table
   */
  setup_message_id_table (am);

  return 0;
}

VLIB_API_INIT_FUNCTION (feature_api_hookup);

/*
 * fd.io coding-style-patch-verification: ON
 *
 * Local Variables:
 * eval: (c-set-style "gnu")
 * End:
 */