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authorBenoît Ganne <bganne@cisco.com>2019-09-11 16:43:44 +0200
committerDave Barach <openvpp@barachs.net>2019-09-30 16:12:30 +0000
commitf26b2511cf661d4ebef32c19f944041637ec5907 (patch)
treef2a0e90d9ceae0b0024019549a529f241238fb40 /src/vppinfra/backtrace.c
parentae07240340b6fb44b1a8faa38e60da43bfd1307c (diff)
api: fix use-after-free
Type: fix Change-Id: I2a599c22d5770587fdd419e5d212c8527054d2e9 Signed-off-by: Benoît Ganne <bganne@cisco.com>
Diffstat (limited to 'src/vppinfra/backtrace.c')
0 files changed, 0 insertions, 0 deletions
d='n141' href='#n141'>141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 
/*
 *------------------------------------------------------------------
 * lldp_api.c - lldp api
 *
 * Copyright (c) 2017 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/interface.h>
#include <vnet/api_errno.h>
#include <vnet/lldp/lldp.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_vpe_api_msg                             \
_(LLDP_CONFIG, lldp_config)                             \
_(SW_INTERFACE_SET_LLDP, sw_interface_set_lldp)

static void
vl_api_lldp_config_t_handler (vl_api_lldp_config_t * mp)
{
  vl_api_lldp_config_reply_t *rmp;
  int rv = 0;
  u8 *sys_name = 0;

  vec_validate (sys_name, strlen ((char *) mp->system_name) - 1);
  strncpy ((char *) sys_name, (char *) mp->system_name, vec_len (sys_name));

  if (lldp_cfg_set (&sys_name, ntohl (mp->tx_hold), ntohl (mp->tx_interval))
      != lldp_ok)
    {
      vec_free (sys_name);
      rv = VNET_API_ERROR_INVALID_VALUE;
    }

  REPLY_MACRO (VL_API_LLDP_CONFIG_REPLY);
}

static void
vl_api_sw_interface_set_lldp_t_handler (vl_api_sw_interface_set_lldp_t * mp)
{
  vl_api_sw_interface_set_lldp_reply_t *rmp;
  int rv = 0;
  u8 *port_desc = 0, *mgmt_ip4 = 0, *mgmt_ip6 = 0, *mgmt_oid = 0;
  u8 no_data[256];

  memset (no_data, 0, 256);

  if (memcmp (mp->port_desc, no_data, strlen ((char *) mp->port_desc)) != 0)
    {
      vec_validate (port_desc, strlen ((char *) mp->port_desc) - 1);
      strncpy ((char *) port_desc, (char *) mp->port_desc,
	       vec_len (port_desc));
    }

  if (memcmp (mp->mgmt_ip4, no_data, sizeof (mp->mgmt_ip4)) != 0)
    {
      vec_validate (mgmt_ip4, sizeof (mp->mgmt_ip4) - 1);
      clib_memcpy (mgmt_ip4, mp->mgmt_ip4, vec_len (mgmt_ip4));
    }

  if (memcmp (mp->mgmt_ip6, no_data, sizeof (mp->mgmt_ip6)) != 0)
    {
      vec_validate (mgmt_ip6, sizeof (mp->mgmt_ip6) - 1);
      clib_memcpy (mgmt_ip6, mp->mgmt_ip6, vec_len (mgmt_ip6));
    }

  if (memcmp (mp->mgmt_oid, no_data, strlen ((char *) mp->mgmt_oid)) != 0)
    {
      vec_validate (mgmt_oid, strlen ((char *) mp->mgmt_oid) - 1);
      strncpy ((char *) mgmt_oid, (char *) mp->mgmt_oid, vec_len (mgmt_oid));
    }

  VALIDATE_SW_IF_INDEX (mp);

  if (lldp_cfg_intf_set (ntohl (mp->sw_if_index), &port_desc,
			 &mgmt_ip4, &mgmt_ip6, &mgmt_oid,
			 mp->enable) != lldp_ok)
    {
      vec_free (port_desc);
      vec_free (mgmt_ip4);
      vec_free (mgmt_ip6);
      vec_free (mgmt_oid);
      rv = VNET_API_ERROR_INVALID_VALUE;
    }

  BAD_SW_IF_INDEX_LABEL;

  REPLY_MACRO (VL_API_SW_INTERFACE_SET_LLDP_REPLY);
}


/*
 *  * lldp_api_hookup
 *   * Add vpe's API message handlers to the table.
 *    * vlib has alread mapped shared memory and
 *     * added the client registration handlers.
 *      * See .../vlib-api/vlibmemory/memclnt_vlib.c:memclnt_process()
 *       */
#define vl_msg_name_crc_list
#include <vnet/vnet_all_api_h.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_lldp;
#undef _
}

static clib_error_t *
lldp_api_hookup (vlib_main_t * vm)
{
  api_main_t *am = &api_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_vpe_api_msg;
#undef _

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

  return 0;
}

VLIB_API_INIT_FUNCTION (lldp_api_hookup);

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