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authorNeale Ranns <neale@graphiant.com>2022-01-10 11:21:17 +0000
committerMatthew Smith <mgsmith@netgate.com>2022-02-17 15:42:29 +0000
commit992a4d0d4e229f9891b0d7b1528fcdb851482385 (patch)
treeeffd7b94f489075320e9567a7941e446a925a529 /src/vnet/pg/input.c
parente2b15863f9bcbdb7fddfd9eb62a13b24b8f5b23b (diff)
ipsec: Improve the handling of NAT-T keepalive messages
Type: improvement Ethernet frames on the wire are a minimum of 64 bytes, so use the length in the UDP header to determine if the ESP payload is one bytes of the special SPI, rather than the buffer's size (which will include the ethernet header's padding). In the case of drop advance the packet back to the IP header so the ipx-drop node sees a sane packet. Signed-off-by: Neale Ranns <neale@graphiant.com> Change-Id: Ic3b75487919f0c77507d6f725bd11202bc5afee8
Diffstat (limited to 'src/vnet/pg/input.c')
0 files changed, 0 insertions, 0 deletions
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/*
 * gbp.h : Group Based Policy
 *
 * Copyright (c) 2018 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 <plugins/gbp/gbp_scanner.h>
#include <plugins/gbp/gbp_endpoint.h>
#include <plugins/gbp/gbp_vxlan.h>

/**
 * Scanner logger
 */
vlib_log_class_t gs_logger;

/**
 * Scanner state
 */
static bool gs_enabled;

#define GBP_SCANNER_DBG(...)                                      \
    vlib_log_debug (gs_logger, __VA_ARGS__);

static uword
gbp_scanner (vlib_main_t * vm, vlib_node_runtime_t * rt, vlib_frame_t * f)
{
  uword event_type, *event_data = 0;
  bool do_scan = 0;

  while (1)
    {
      do_scan = 0;

      if (gs_enabled)
	{
	  /* scan every 'inactive threshold' seconds */
	  vlib_process_wait_for_event_or_clock (vm, 2);
	}
      else
	vlib_process_wait_for_event (vm);

      event_type = vlib_process_get_events (vm, &event_data);
      vec_reset_length (event_data);

      switch (event_type)
	{
	case ~0:
	  /* timer expired */
	  do_scan = 1;
	  break;

	case GBP_ENDPOINT_SCAN_START:
	  gs_enabled = 1;
	  break;

	case GBP_ENDPOINT_SCAN_STOP:
	  gs_enabled = 0;
	  break;

	case GBP_ENDPOINT_SCAN_SET_TIME:
	  break;

	default:
	  ASSERT (0);
	}

      if (do_scan)
	{
	  GBP_SCANNER_DBG ("start");
	  gbp_endpoint_scan (vm);
	  GBP_SCANNER_DBG ("stop");
	}
    }
  return 0;
}

/* *INDENT-OFF* */
VLIB_REGISTER_NODE (gbp_scanner_node) = {
    .function = gbp_scanner,
    .type = VLIB_NODE_TYPE_PROCESS,
    .name = "gbp-scanner",
};
/* *INDENT-ON* */

static clib_error_t *
gbp_scanner_cli (vlib_main_t * vm,
		 unformat_input_t * input, vlib_cli_command_t * cmd)
{
  vlib_cli_output (vm, "GBP-scanner: enabled:%d interval:2", gs_enabled);

  return (NULL);
}

/*?
 * Show GBP scanner
 *
 * @cliexpar
 * @cliexstart{show gbp scanner}
 * @cliexend
 ?*/
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (gbp_scanner_cli_node, static) = {
  .path = "show gbp scanner",
  .short_help = "show gbp scanner",
  .function = gbp_scanner_cli,
};
/* *INDENT-ON* */

static clib_error_t *
gbp_scanner_init (vlib_main_t * vm)
{
  gs_logger = vlib_log_register_class ("gbp", "scan");

  return (NULL);
}

VLIB_INIT_FUNCTION (gbp_scanner_init);

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