cli.c

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/* SPDX-License-Identifier: Apache-2.0
 * Copyright(c) 2021 Cisco Systems, Inc.
 */
 
#include <vlib/vlib.h>
#include <vnet/vnet.h>
#include <snort/snort.h>
 
static u8 *
format_snort_instance (u8 *s, va_list *args)
{
  snort_instance_t *i = va_arg (*args, snort_instance_t *);
  s = format (s, "%s [idx:%d sz:%d fd:%d]", i->name, i->index, i->shm_size,
              i->shm_fd);
 
  return s;
}
 
static clib_error_t *
snort_create_instance_command_fn (vlib_main_t *vm, unformat_input_t *input,
                                  vlib_cli_command_t *cmd)
{
  unformat_input_t _line_input, *line_input = &_line_input;
  clib_error_t *err = 0;
  u8 *name = 0;
  u32 queue_size = 1024;
  u8 drop_on_diconnect = 1;
 
  /* Get a line of input. */
  if (!unformat_user (input, unformat_line_input, line_input))
    return 0;
 
  while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
    {
      if (unformat (line_input, "queue-size %u", &queue_size))
        ;
      else if (unformat (line_input, "on-disconnect drop"))
        drop_on_diconnect = 1;
      else if (unformat (line_input, "on-disconnect pass"))
        drop_on_diconnect = 0;
      else if (unformat (line_input, "name %s", &name))
        ;
      else
        {
          err = clib_error_return (0, "unknown input `%U'",
                                   format_unformat_error, input);
          goto done;
        }
    }
 
  if (!is_pow2 (queue_size))
    {
      err = clib_error_return (0, "Queue size must be a power of two");
      goto done;
    }
 
  if (!name)
    {
      err = clib_error_return (0, "please specify instance name");
      goto done;
    }
 
  err = snort_instance_create (vm, (char *) name, min_log2 (queue_size),
                               drop_on_diconnect);
 
done:
  vec_free (name);
  unformat_free (line_input);
  return err;
}
 
VLIB_CLI_COMMAND (snort_create_instance_command, static) = {
  .path = "snort create-instance",
  .short_help = "snort create-instaince name <name> [queue-size <size>] "
                "[on-disconnect drop|pass]",
  .function = snort_create_instance_command_fn,
};
 
static clib_error_t *
snort_attach_command_fn (vlib_main_t *vm, unformat_input_t *input,
                         vlib_cli_command_t *cmd)
{
  unformat_input_t _line_input, *line_input = &_line_input;
  vnet_main_t *vnm = vnet_get_main ();
  clib_error_t *err = 0;
  u8 *name = 0;
  u32 sw_if_index = ~0;
 
  /* Get a line of input. */
  if (!unformat_user (input, unformat_line_input, line_input))
    return 0;
 
  while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
    {
      if (unformat (line_input, "interface %U", unformat_vnet_sw_interface,
                    vnm, &sw_if_index))
        ;
      else if (unformat (line_input, "instance %s", &name))
        ;
      else
        {
          err = clib_error_return (0, "unknown input `%U'",
                                   format_unformat_error, input);
          goto done;
        }
    }
 
  if (sw_if_index == ~0)
    {
      err = clib_error_return (0, "please specify interface");
      goto done;
    }
 
  if (!name)
    {
      err = clib_error_return (0, "please specify instance name");
      goto done;
    }
 
  err = snort_interface_enable_disable (vm, (char *) name, sw_if_index, 1);
 
done:
  vec_free (name);
  unformat_free (line_input);
  return err;
}
 
VLIB_CLI_COMMAND (snort_attach_command, static) = {
  .path = "snort attach",
  .short_help = "snort attach instance <name> interface <if-name>",
  .function = snort_attach_command_fn,
};
 
static clib_error_t *
snort_detach_command_fn (vlib_main_t *vm, unformat_input_t *input,
                         vlib_cli_command_t *cmd)
{
  unformat_input_t _line_input, *line_input = &_line_input;
  vnet_main_t *vnm = vnet_get_main ();
  clib_error_t *err = 0;
  u32 sw_if_index = ~0;
 
  /* Get a line of input. */
  if (!unformat_user (input, unformat_line_input, line_input))
    return 0;
 
  while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
    {
      if (unformat (line_input, "interface %U", unformat_vnet_sw_interface,
                    vnm, &sw_if_index))
        ;
      else
        {
          err = clib_error_return (0, "unknown input `%U'",
                                   format_unformat_error, input);
          goto done;
        }
    }
 
  if (sw_if_index == ~0)
    {
      err = clib_error_return (0, "please specify interface");
      goto done;
    }
 
  err = snort_interface_enable_disable (vm, 0, sw_if_index, 0);
 
done:
  unformat_free (line_input);
  return err;
}
 
VLIB_CLI_COMMAND (snort_detach_command, static) = {
  .path = "snort detach",
  .short_help = "snort detach interface <if-name>",
  .function = snort_detach_command_fn,
};
 
static clib_error_t *
snort_show_instances_command_fn (vlib_main_t *vm, unformat_input_t *input,
                                 vlib_cli_command_t *cmd)
{
  snort_main_t *sm = &snort_main;
  snort_instance_t *si;
 
  pool_foreach (si, sm->instances)
    vlib_cli_output (vm, "%U", format_snort_instance, si);
 
  return 0;
}
 
VLIB_CLI_COMMAND (snort_show_instances_command, static) = {
  .path = "show snort instances",
  .short_help = "show snort instances",
  .function = snort_show_instances_command_fn,
};
 
static clib_error_t *
snort_show_interfaces_command_fn (vlib_main_t *vm, unformat_input_t *input,
                                  vlib_cli_command_t *cmd)
{
  snort_main_t *sm = &snort_main;
  vnet_main_t *vnm = vnet_get_main ();
  snort_instance_t *si;
  u32 *index;
 
  vlib_cli_output (vm, "interface\tsnort instance");
  vec_foreach (index, sm->instance_by_sw_if_index)
    {
      if (index[0] != ~0)
        {
          si = vec_elt_at_index (sm->instances, index[0]);
          vlib_cli_output (vm, "%U:\t%s", format_vnet_sw_if_index_name, vnm,
                           index - sm->instance_by_sw_if_index, si->name);
        }
    }
  return 0;
}
 
VLIB_CLI_COMMAND (snort_show_interfaces_command, static) = {
  .path = "show snort interfaces",
  .short_help = "show snort interfaces",
  .function = snort_show_interfaces_command_fn,
};
 
static clib_error_t *
snort_show_clients_command_fn (vlib_main_t *vm, unformat_input_t *input,
                               vlib_cli_command_t *cmd)
{
  snort_main_t *sm = &snort_main;
  vlib_cli_output (vm, "number of clients: %d", pool_elts (sm->clients));
  return 0;
}
 
VLIB_CLI_COMMAND (snort_show_clients_command, static) = {
  .path = "show snort clients",
  .short_help = "show snort clients",
  .function = snort_show_clients_command_fn,
};
 
static clib_error_t *
snort_mode_polling_command_fn (vlib_main_t *vm, unformat_input_t *input,
                               vlib_cli_command_t *cmd)
{
  return snort_set_node_mode (vm, VLIB_NODE_STATE_POLLING);
}
 
static clib_error_t *
snort_mode_interrupt_command_fn (vlib_main_t *vm, unformat_input_t *input,
                                 vlib_cli_command_t *cmd)
{
  return snort_set_node_mode (vm, VLIB_NODE_STATE_INTERRUPT);
}
 
VLIB_CLI_COMMAND (snort_mode_polling_command, static) = {
  .path = "snort mode polling",
  .short_help = "snort mode polling|interrupt",
  .function = snort_mode_polling_command_fn,
};
 
VLIB_CLI_COMMAND (snort_mode_interrupt_command, static) = {
  .path = "snort mode interrupt",
  .short_help = "snort mode polling|interrupt",
  .function = snort_mode_interrupt_command_fn,
};
 
static clib_error_t *
snort_show_mode_command_fn (vlib_main_t *vm, unformat_input_t *input,
                            vlib_cli_command_t *cmd)
{
  snort_main_t *sm = &snort_main;
  char *mode =
    sm->input_mode == VLIB_NODE_STATE_POLLING ? "polling" : "interrupt";
  vlib_cli_output (vm, "input mode: %s", mode);
  return 0;
}
 
VLIB_CLI_COMMAND (snort_show_mode_command, static) = {
  .path = "show snort mode",
  .short_help = "show snort mode",
  .function = snort_show_mode_command_fn,
};