/*
 * decap.c : IPSec tunnel support
 *
 * Copyright (c) 2015 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/api_errno.h>
#include <vnet/ip/ip.h>
#include <vnet/interface.h>

#include <vnet/ipsec/ipsec.h>

static clib_error_t *
set_interface_spd_command_fn (vlib_main_t * vm,
                              unformat_input_t * input,
                              vlib_cli_command_t * cmd)
{
  unformat_input_t _line_input, * line_input = &_line_input;
  ipsec_main_t *im = &ipsec_main;
  u32 sw_if_index = (u32) ~0;
  u32 spd_id;
  int is_add = 1;

  if (! unformat_user (input, unformat_line_input, line_input))
    return 0;

  if (unformat (line_input, "%U %u", unformat_vnet_sw_interface, im->vnet_main,
                &sw_if_index, &spd_id))
    ;
  else if (unformat (line_input, "del"))
    is_add = 0;
  else
    return clib_error_return (0, "parse error: '%U'",
                              format_unformat_error, line_input);

  unformat_free (line_input);

  ipsec_set_interface_spd(vm, sw_if_index, spd_id, is_add);

  return 0;
}

VLIB_CLI_COMMAND (set_interface_spd_command, static) = {
    .path = "set interface ipsec spd",
    .short_help =
    "set interface ipsec spd <int> <id>",
    .function = set_interface_spd_command_fn,
};

static clib_error_t *
ipsec_sa_add_del_command_fn (vlib_main_t * vm,
                              unformat_input_t * input,
                              vlib_cli_command_t * cmd)
{
  unformat_input_t _line_input, * line_input = &_line_input;
  ipsec_sa_t sa;
  int is_add = ~0;
  u8 * ck, * ik;

  memset(&sa, 0, sizeof(sa));

  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, "add %u", &sa.id))
      is_add = 1;
    else if (unformat (line_input, "del %u", &sa.id))
      is_add = 0;
    else if (unformat (line_input, "spi %u", &sa.spi))
      ;
    else if (unformat (line_input, "esp"))
      sa.protocol = IPSEC_PROTOCOL_ESP;
    else if (unformat (line_input, "ah"))
      //sa.protocol = IPSEC_PROTOCOL_AH;
      return clib_error_return(0, "unsupported security protocol 'AH'");
    else if (unformat (line_input, "crypto-key %U", unformat_hex_string, &ck))
      sa.crypto_key_len = vec_len (ck);
    else if (unformat (line_input, "crypto-alg %U", unformat_ipsec_crypto_alg,
                       &sa.crypto_alg))
      {
        if (sa.crypto_alg < IPSEC_CRYPTO_ALG_AES_CBC_128 ||
            sa.crypto_alg > IPSEC_CRYPTO_ALG_AES_CBC_256)
          return clib_error_return(0, "unsupported crypto-alg: '%U'",
                                   format_ipsec_crypto_alg, sa.crypto_alg);
      }
    else if (unformat (line_input, "integ-key %U", unformat_hex_string, &ik))
      sa.integ_key_len = vec_len (ik);
    else if (unformat (line_input, "integ-alg %U", unformat_ipsec_integ_alg,
                       &sa.integ_alg))
      {
        if (sa.integ_alg < IPSEC_INTEG_ALG_SHA1_96 ||
             sa.integ_alg > IPSEC_INTEG_ALG_SHA_512_256)
          return clib_error_return(0, "unsupported integ-alg: '%U'",
                                   format_ipsec_integ_alg, sa.integ_alg);
      }
    else if (unformat (line_input, "tunnel-src %U",
                       unformat_ip4_address, &sa.tunnel_src_addr.ip4))
      sa.is_tunnel = 1;
    else if (unformat (line_input, "tunnel-dst %U",
                       unformat_ip4_address, &sa.tunnel_dst_addr.ip4))
      sa.is_tunnel = 1;
    else if (unformat (line_input, "tunnel-src %U",
                       unformat_ip6_address, &sa.tunnel_src_addr.ip6))
      { sa.is_tunnel = 1; sa.is_tunnel_ip6 = 1; }
    else if (unformat (line_input, "tunnel-dst %U",
                       unformat_ip6_address, &sa.tunnel_dst_addr.ip6))
      { sa.is_tunnel = 1; sa.is_tunnel_ip6 = 1; }
    else 
      return clib_error_return (0, "parse error: '%U'",
                              format_unformat_error, line_input);
  }

  unformat_free (line_input);

  if (sa.crypto_key_len > sizeof(sa.crypto_key))
    sa.crypto_key_len = sizeof(sa.crypto_key);

  if (sa.integ_key_len > sizeof(sa.integ_key))
    sa.integ_key_len = sizeof(sa.integ_key);

  if (ck)
    strncpy((char *) sa.crypto_key, (char *) ck, sa.crypto_key_len);

  if (ik)
    strncpy((char *) sa.integ_key, (char *) ik, sa.integ_key_len);

  ipsec_add_del_sa(vm, &sa, is_add);

  return 0;
}

VLIB_CLI_COMMAND (ipsec_sa_add_del_command, static) = {
    .path = "ipsec sa",
    .short_help =
    "ipsec sa [add|del]",
    .function = ipsec_sa_add_del_command_fn,
};

static clib_error_t *
ipsec_spd_add_del_command_fn (vlib_main_t * vm,
                              unformat_input_t * input,
                              vlib_cli_command_t * cmd)
{
  unformat_input_t _line_input, * line_input = &_line_input;
  u32 spd_id;
  int is_add = ~0;

  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, "add"))
      is_add = 1;
    else if (unformat (line_input, "del"))
      is_add = 0;
    else if (unformat (line_input, "%u", &spd_id))
      ;
    else
      return clib_error_return (0, "parse error: '%U'",
                              format_unformat_error, line_input);
  }

  unformat_free (line_input);

  ipsec_add_del_spd(vm, spd_id, is_add);

  return 0;
}

VLIB_CLI_COMMAND (ipsec_spd_add_del_command, static) = {
    .path = "ipsec spd",
    .short_help =
    "ipsec spd [add|del] <id>",
    .function = ipsec_spd_add_del_command_fn,
};


static clib_error_t *
ipsec_policy_add_del_command_fn (vlib_main_t * vm,
                                 unformat_input_t * input,
                                 vlib_cli_command_t * cmd)
{
  unformat_input_t _line_input, * line_input = &_line_input;
  ipsec_policy_t p;
  int is_add = 0;
  int is_ip_any = 1;
  u32 tmp, tmp2;

  memset(&p, 0, sizeof(p));
  p.lport.stop = p.rport.stop = ~0;
  p.laddr.stop.ip4.as_u32 = p.raddr.stop.ip4.as_u32 = (u32) ~0;
  p.laddr.stop.ip6.as_u64[0] = p.laddr.stop.ip6.as_u64[1] = (u64) ~0;
  p.raddr.stop.ip6.as_u64[0] = p.raddr.stop.ip6.as_u64[1] = (u64) ~0;

  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, "add"))
      is_add = 1;
    else if (unformat (line_input, "del"))
      is_add = 0;
    else if (unformat (line_input, "spd %u", &p.id))
      ;
    else if (unformat (line_input, "inbound"))
      p.is_outbound = 0;
    else if (unformat (line_input, "outbound"))
      p.is_outbound = 1;
    else if (unformat (line_input, "priority %d", &p.priority))
      ;
    else if (unformat (line_input, "protocol %u", &tmp))
      p.protocol = (u8) tmp;
    else if (unformat (line_input, "action %U", unformat_ipsec_policy_action,
                       &p.policy))
      {
        if (p.policy == IPSEC_POLICY_ACTION_RESOLVE)
          return clib_error_return(0, "unsupported action: 'resolve'");
      }
    else if (unformat (line_input, "sa %u", &p.sa_id))
      ;
    else if (unformat (line_input, "local-ip-range %U - %U",
                       unformat_ip4_address, &p.laddr.start.ip4,
                       unformat_ip4_address, &p.laddr.stop.ip4))
      is_ip_any = 0;
    else if (unformat (line_input, "remote-ip-range %U - %U",
                       unformat_ip4_address, &p.raddr.start.ip4,
                       unformat_ip4_address, &p.raddr.stop.ip4))
      is_ip_any = 0;
    else if (unformat (line_input, "local-ip-range %U - %U",
                       unformat_ip6_address, &p.laddr.start.ip6,
                       unformat_ip6_address, &p.laddr.stop.ip6))
      {
        p.is_ipv6 = 1;
        is_ip_any = 0;
      }
    else if (unformat (line_input, "remote-ip-range %U - %U",
                       unformat_ip6_address, &p.raddr.start.ip6,
                       unformat_ip6_address, &p.raddr.stop.ip6))
      {
        p.is_ipv6 = 1;
        is_ip_any = 0;
      }
    else if (unformat (line_input, "local-port-range %u - %u", &tmp, &tmp2))
      { p.lport.start = tmp; p.lport.stop = tmp2; }
    else if (unformat (line_input, "remote-port-range %u - %u", &tmp, &tmp2))
      { p.rport.start = tmp; p.rport.stop = tmp2; }
    else 
      return clib_error_return (0, "parse error: '%U'",
                              format_unformat_error, line_input);
  }

  unformat_free (line_input);

  ipsec_add_del_policy(vm, &p, is_add);
  if (is_ip_any)
    {
      p.is_ipv6 = 1;
      ipsec_add_del_policy(vm, &p, is_add);
    }
  return 0;
}

VLIB_CLI_COMMAND (ipsec_policy_add_del_command, static) = {
    .path = "ipsec policy",
    .short_help =
    "ipsec policy [add|del] spd <id> priority <n> ",
    .function = ipsec_policy_add_del_command_fn,
};

static clib_error_t *
set_ipsec_sa_key_command_fn (vlib_main_t * vm,
                             unformat_input_t * input,
                             vlib_cli_command_t * cmd)
{
  unformat_input_t _line_input, * line_input = &_line_input;
  ipsec_sa_t sa;
  u8 * ck, * ik;

  memset(&sa, 0, sizeof(sa));

  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, "%u", &sa.id))
      ;
    else if (unformat (line_input, "crypto-key %U", unformat_hex_string, &ck))
      sa.crypto_key_len = vec_len (ck);
    else if (unformat (line_input, "integ-key %U", unformat_hex_string, &ik))
      sa.integ_key_len = vec_len (ik);
    else
      return clib_error_return (0, "parse error: '%U'", format_unformat_error,
                                line_input);
  }

  unformat_free (line_input);

  if (sa.crypto_key_len > sizeof(sa.crypto_key))
    sa.crypto_key_len = sizeof(sa.crypto_key);

  if (sa.integ_key_len > sizeof(sa.integ_key))
    sa.integ_key_len = sizeof(sa.integ_key);

  if (ck)
    strncpy((char *) sa.crypto_key, (char *) ck, sa.crypto_key_len);

  if (ik)
    strncpy((char *) sa.integ_key, (char *) ik, sa.integ_key_len);

  ipsec_set_sa_key(vm, &sa);

  return 0;
}

VLIB_CLI_COMMAND (set_ipsec_sa_key_command, static) = {
    .path = "set ipsec sa",
    .short_help =
    "set ipsec sa <id> crypto-key <key> integ-key <key>",
    .function = set_ipsec_sa_key_command_fn,
};

static clib_error_t *
show_ipsec_command_fn (vlib_main_t * vm,
                       unformat_input_t * input,
                       vlib_cli_command_t * cmd)
{
  ipsec_spd_t * spd;
  ipsec_sa_t * sa;
  ipsec_policy_t * p;
  ipsec_main_t * im = &ipsec_main;
  u32 * i;
  ipsec_tunnel_if_t * t;
  vnet_hw_interface_t * hi;

  pool_foreach (sa, im->sad, ({
    if (sa->id) {
      vlib_cli_output(vm, "sa %u spi %u mode %s protocol %s", sa->id, sa->spi,
                      sa->is_tunnel ? "tunnel" : "transport",
                      sa->protocol ? "esp" : "ah");
      if (sa->protocol == IPSEC_PROTOCOL_ESP) {
        vlib_cli_output(vm, "  crypto alg %U%s%U integrity alg %U%s%U",
                        format_ipsec_crypto_alg, sa->crypto_alg,
                        sa->crypto_alg ? " key " : "",
                        format_hex_bytes, sa->crypto_key, sa->crypto_key_len,
                        format_ipsec_integ_alg, sa->integ_alg,
                        sa->integ_alg ? " key " : "",
                        format_hex_bytes, sa->integ_key, sa->integ_key_len);
      }
      if (sa->is_tunnel && sa->is_tunnel_ip6) {
        vlib_cli_output(vm, "  tunnel src %U dst %U",
                        format_ip6_address, &sa->tunnel_src_addr.ip6,
                        format_ip6_address, &sa->tunnel_dst_addr.ip6);
      } else if (sa->is_tunnel) {
        vlib_cli_output(vm, "  tunnel src %U dst %U",
                        format_ip4_address, &sa->tunnel_src_addr.ip4,
                        format_ip4_address, &sa->tunnel_dst_addr.ip4);
      }
    }
  }));

  pool_foreach (spd, im->spds, ({
    vlib_cli_output(vm, "spd %u", spd->id);

    vlib_cli_output(vm, " outbound policies");
    vec_foreach(i, spd->ipv4_outbound_policies)
      {
        p = pool_elt_at_index(spd->policies, *i);
        vlib_cli_output(vm, "  priority %d action %U protocol %s%s",
                        p->priority,
                        format_ipsec_policy_action, p->policy,
                        p->protocol ?
                          format(0, "%U", format_ip_protocol, p->protocol) :
                          (u8 *) "any",
                        p->policy == IPSEC_POLICY_ACTION_PROTECT ?
                          format(0, " sa %u", p->sa_id) :
                          (u8 *) "");
        vlib_cli_output(vm, "   local addr range %U - %U port range %u - %u",
                        format_ip4_address, &p->laddr.start.ip4,
                        format_ip4_address, &p->laddr.stop.ip4,
                        p->lport.start, p->lport.stop);
        vlib_cli_output(vm, "   remte addr range %U - %U port range %u - %u",
                        format_ip4_address, &p->raddr.start.ip4,
                        format_ip4_address, &p->raddr.stop.ip4,
                        p->rport.start, p->rport.stop);
        vlib_cli_output(vm, "   packets %u bytes %u", p->counter.packets,
                        p->counter.bytes);
      };
    vec_foreach(i, spd->ipv6_outbound_policies)
      {
        p = pool_elt_at_index(spd->policies, *i);
        vlib_cli_output(vm, "  priority %d action %U protocol %s%s",
                        p->priority,
                        format_ipsec_policy_action, p->policy,
                        p->protocol ?
                          format(0, "%U", format_ip_protocol, p->protocol) :
                          (u8 *) "any",
                        p->policy == IPSEC_POLICY_ACTION_PROTECT ?
                          format(0, " sa %u", p->sa_id) :
                          (u8 *) "");
        vlib_cli_output(vm, "   local addr range %U - %U port range %u - %u",
                        format_ip6_address, &p->laddr.start.ip6,
                        format_ip6_address, &p->laddr.stop.ip6,
                        p->lport.start, p->lport.stop);
        vlib_cli_output(vm, "   remote addr range %U - %U port range %u - %u",
                        format_ip6_address, &p->raddr.start.ip6,
                        format_ip6_address, &p->raddr.stop.ip6,
                        p->rport.start, p->rport.stop);
        vlib_cli_output(vm, "   packets %u bytes %u", p->counter.packets,
                        p->counter.bytes);
      };
    vlib_cli_output(vm, " inbound policies");
    vec_foreach(i, spd->ipv4_inbound_protect_policy_indices)
      {
        p = pool_elt_at_index(spd->policies, *i);
        vlib_cli_output(vm, "  priority %d action %U protocol %s%s",
                        p->priority,
                        format_ipsec_policy_action, p->policy,
                        p->protocol ?
                          format(0, "%U", format_ip_protocol, p->protocol) :
                          (u8 *) "any",
                        p->policy == IPSEC_POLICY_ACTION_PROTECT ?
                          format(0, " sa %u", p->sa_id) :
                          (u8 *) "");
        vlib_cli_output(vm, "   local addr range %U - %U port range %u - %u",
                        format_ip4_address, &p->laddr.start.ip4,
                        format_ip4_address, &p->laddr.stop.ip4,
                        p->lport.start, p->lport.stop);
        vlib_cli_output(vm, "   remte addr range %U - %U port range %u - %u",
                        format_ip4_address, &p->raddr.start.ip4,
                        format_ip4_address, &p->raddr.stop.ip4,
                        p->rport.start, p->rport.stop);
        vlib_cli_output(vm, "   packets %u bytes %u", p->counter.packets,
                        p->counter.bytes);
      };
    vec_foreach(i, spd->ipv4_inbound_policy_discard_and_bypass_indices)
      {
        p = pool_elt_at_index(spd->policies, *i);
        vlib_cli_output(vm, "  priority %d action %U protocol %s%s",
                        p->priority,
                        format_ipsec_policy_action, p->policy,
                        p->protocol ?
                          format(0, "%U", format_ip_protocol, p->protocol) :
                          (u8 *) "any",
                        p->policy == IPSEC_POLICY_ACTION_PROTECT ?
                          format(0, " sa %u", p->sa_id) :
                          (u8 *) "");
        vlib_cli_output(vm, "   local addr range %U - %U port range %u - %u",
                        format_ip4_address, &p->laddr.start.ip4,
                        format_ip4_address, &p->laddr.stop.ip4,
                        p->lport.start, p->lport.stop);
        vlib_cli_output(vm, "   remte addr range %U - %U port range %u - %u",
                        format_ip4_address, &p->raddr.start.ip4,
                        format_ip4_address, &p->raddr.stop.ip4,
                        p->rport.start, p->rport.stop);
        vlib_cli_output(vm, "   packets %u bytes %u", p->counter.packets,
                        p->counter.bytes);
      };
    vec_foreach(i, spd->ipv6_inbound_protect_policy_indices)
      {
        p = pool_elt_at_index(spd->policies, *i);
        vlib_cli_output(vm, "  priority %d action %U protocol %s%s",
                        p->priority,
                        format_ipsec_policy_action, p->policy,
                        p->protocol ?
                          format(0, "%U", format_ip_protocol, p->protocol) :
                          (u8 *) "any",
                        p->policy == IPSEC_POLICY_ACTION_PROTECT ?
                          format(0, " sa %u", p->sa_id) :
                          (u8 *) "");
        vlib_cli_output(vm, "   local addr range %U - %U port range %u - %u",
                        format_ip6_address, &p->laddr.start.ip6,
                        format_ip6_address, &p->laddr.stop.ip6,
                        p->lport.start, p->lport.stop);
        vlib_cli_output(vm, "   remote addr range %U - %U port range %u - %u",
                        format_ip6_address, &p->raddr.start.ip6,
                        format_ip6_address, &p->raddr.stop.ip6,
                        p->rport.start, p->rport.stop);
        vlib_cli_output(vm, "   packets %u bytes %u", p->counter.packets,
                        p->counter.bytes);
      };
    vec_foreach(i, spd->ipv6_inbound_policy_discard_and_bypass_indices)
      {
        p = pool_elt_at_index(spd->policies, *i);
        vlib_cli_output(vm, "  priority %d action %U protocol %s%s",
                        p->priority,
                        format_ipsec_policy_action, p->policy,
                        p->protocol ?
                          format(0, "%U", format_ip_protocol, p->protocol) :
                          (u8 *) "any",
                        p->policy == IPSEC_POLICY_ACTION_PROTECT ?
                          format(0, " sa %u", p->sa_id) :
                          (u8 *) "");
        vlib_cli_output(vm, "   local addr range %U - %U port range %u - %u",
                        format_ip6_address, &p->laddr.start.ip6,
                        format_ip6_address, &p->laddr.stop.ip6,
                        p->lport.start, p->lport.stop);
        vlib_cli_output(vm, "   remote addr range %U - %U port range %u - %u",
                        format_ip6_address, &p->raddr.start.ip6,
                        format_ip6_address, &p->raddr.stop.ip6,
                        p->rport.start, p->rport.stop);
        vlib_cli_output(vm, "   packets %u bytes %u", p->counter.packets,
                        p->counter.bytes);
      };
  }));

  vlib_cli_output(vm, "tunnel interfaces");
  pool_foreach (t, im->tunnel_interfaces, ({
    hi = vnet_get_hw_interface (im->vnet_main, t->hw_if_index);
    vlib_cli_output(vm, "  %s seq", hi->name);
    sa = pool_elt_at_index(im->sad, t->output_sa_index);
    vlib_cli_output(vm, "   seq %u seq-hi %u esn %u anti-replay %u",
                    sa->seq, sa->seq_hi, sa->use_esn, sa->use_anti_replay);
    vlib_cli_output(vm, "   local-spi %u local-ip %U", sa->spi,
                    format_ip4_address, &sa->tunnel_src_addr.ip4);
    vlib_cli_output(vm, "   local-crypto %U %U",
                    format_ipsec_crypto_alg, sa->crypto_alg,
                    format_hex_bytes, sa->crypto_key, sa->crypto_key_len);
    vlib_cli_output(vm, "   local-integrity %U %U",
                    format_ipsec_integ_alg, sa->integ_alg,
                    format_hex_bytes, sa->integ_key, sa->integ_key_len);
    sa = pool_elt_at_index(im->sad, t->input_sa_index);
    vlib_cli_output(vm, "   last-seq %u last-seq-hi %u esn %u anti-replay %u window %U",
                    sa->last_seq, sa->last_seq_hi, sa->use_esn,
                    sa->use_anti_replay,
                    format_ipsec_replay_window, sa->replay_window);
    vlib_cli_output(vm, "   remote-spi %u remote-ip %U", sa->spi,
                    format_ip4_address, &sa->tunnel_src_addr.ip4);
    vlib_cli_output(vm, "   remote-crypto %U %U",
                    format_ipsec_crypto_alg, sa->crypto_alg,
                    format_hex_bytes, sa->crypto_key, sa->crypto_key_len);
    vlib_cli_output(vm, "   remote-integrity %U %U",
                    format_ipsec_integ_alg, sa->integ_alg,
                    format_hex_bytes, sa->integ_key, sa->integ_key_len);
  }));
  return 0;
}

VLIB_CLI_COMMAND (show_ipsec_command, static) = {
    .path = "show ipsec",
    .short_help = "show ipsec",
    .function = show_ipsec_command_fn,
};

static clib_error_t *
clear_ipsec_counters_command_fn (vlib_main_t * vm,
                                 unformat_input_t * input,
                                 vlib_cli_command_t * cmd)
{
  ipsec_main_t * im = &ipsec_main;
  ipsec_spd_t * spd;
  ipsec_policy_t * p;

  pool_foreach (spd, im->spds, ({
    pool_foreach(p, spd->policies, ({
      p->counter.packets = p->counter.bytes = 0;
    }));
  }));

  return 0;
}

VLIB_CLI_COMMAND (clear_ipsec_counters_command, static) = {
    .path = "clear ipsec counters",
    .short_help = "clear ipsec counters",
    .function = clear_ipsec_counters_command_fn,
};

static clib_error_t *
create_ipsec_tunnel_command_fn (vlib_main_t * vm,
     unformat_input_t * input,
     vlib_cli_command_t * cmd)
{
  unformat_input_t _line_input, * line_input = &_line_input;
  ipsec_add_del_tunnel_args_t a;
  ipsec_main_t *im = &ipsec_main;
  int rv;
  u32 num_m_args = 0;
  a.is_add = 1;
  a.anti_replay = 0;
  a.esn = 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, "local-ip %U", unformat_ip4_address, &a.local_ip))
      num_m_args++;
    else if (unformat (line_input, "remote-ip %U", unformat_ip4_address, &a.remote_ip))
      num_m_args++;
    else if (unformat (line_input, "local-spi %u", &a.local_spi))
      num_m_args++;
    else if (unformat (line_input, "remote-spi %u", &a.remote_spi))
      num_m_args++;
    else if (unformat (line_input, "del"))
      a.is_add = 0;
    else
      return clib_error_return (0, "unknown input `%U'",
                                format_unformat_error, input);
  }
  unformat_free (line_input);

  if (num_m_args < 4)
      return clib_error_return (0, "mandatory argument(s) missing");

  rv = ipsec_add_del_tunnel_if (im->vnet_main, &a);

 switch(rv)
    {
    case 0:
      break;
    case VNET_API_ERROR_INVALID_VALUE:
      if (a.is_add)
        return clib_error_return (0, "IPSec tunnel interface already exists...");
      else
        return clib_error_return (0, "IPSec tunnel interface not exists...");
    default:
      return clib_error_return (0, "ipsec_register_interface returned %d", rv);
    }

  return 0;
}

VLIB_CLI_COMMAND (create_ipsec_tunnel_command, static) = {
  .path = "create ipsec tunnel",
  .short_help = "create ipsec tunnel local-ip <addr> local-spi <spi> remote-ip <addr> remote-spi <spi>",
  .function = create_ipsec_tunnel_command_fn,
};

static clib_error_t *
set_interface_key_command_fn (vlib_main_t * vm,
                              unformat_input_t * input,
                              vlib_cli_command_t * cmd)
{
  unformat_input_t _line_input, * line_input = &_line_input;
  ipsec_main_t *im = &ipsec_main;
  ipsec_if_set_key_type_t type = IPSEC_IF_SET_KEY_TYPE_NONE;
  u32 hw_if_index = (u32) ~0;
  u32 alg;
  u8 * key = 0;

  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, "%U",
                    unformat_vnet_hw_interface, im->vnet_main, &hw_if_index))
        ;
      else if (unformat (line_input, "local crypto %U", unformat_ipsec_crypto_alg, &alg))
        type = IPSEC_IF_SET_KEY_TYPE_LOCAL_CRYPTO;
      else if (unformat (line_input, "remote crypto %U", unformat_ipsec_crypto_alg, &alg))
        type = IPSEC_IF_SET_KEY_TYPE_REMOTE_CRYPTO;
      else if (unformat (line_input, "local integ %U", unformat_ipsec_integ_alg, &alg))
        type = IPSEC_IF_SET_KEY_TYPE_LOCAL_INTEG;
      else if (unformat (line_input, "remote integ %U", unformat_ipsec_integ_alg, &alg))
        type = IPSEC_IF_SET_KEY_TYPE_REMOTE_INTEG;
      else if (unformat (line_input, "%U", unformat_hex_string, &key))
        ;
      else
        return clib_error_return (0, "parse error: '%U'",
                                  format_unformat_error, line_input);
    }

  unformat_free (line_input);

  if (type == IPSEC_IF_SET_KEY_TYPE_NONE)
      return clib_error_return (0, "unknown key type");

  if (alg > 0 && vec_len(key)==0)
      return clib_error_return (0, "key is not specified");

  if (hw_if_index == (u32) ~0)
      return clib_error_return (0, "interface not specified");

  ipsec_set_interface_key(im->vnet_main, hw_if_index, type, alg, key);
  vec_free(key);

  return 0;
}

VLIB_CLI_COMMAND (set_interface_key_command, static) = {
    .path = "set interface ipsec key",
    .short_help =
    "set interface ipsec key <int> <local|remote> <crypto|integ> <key type> <key>",
    .function = set_interface_key_command_fn,
};


clib_error_t *
ipsec_cli_init (vlib_main_t * vm)
{
  return 0;
}

VLIB_INIT_FUNCTION (ipsec_cli_init);