api.c

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/*
 *------------------------------------------------------------------
 * api.c - message handler registration
 *
 * Copyright (c) 2010-2016 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 <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <netinet/in.h>
#include <signal.h>
#include <pthread.h>
#include <unistd.h>
#include <time.h>
#include <fcntl.h>
#include <string.h>
#include <pwd.h>
#include <grp.h>

#include <vppinfra/clib.h>
#include <vppinfra/vec.h>
#include <vppinfra/hash.h>
#include <vppinfra/bitmap.h>
#include <vppinfra/fifo.h>
#include <vppinfra/time.h>
#include <vppinfra/mheap.h>
#include <vppinfra/heap.h>
#include <vppinfra/pool.h>
#include <vppinfra/format.h>
#include <vppinfra/error.h>

#include <vnet/api_errno.h>
#include <vnet/vnet.h>
#include <vnet/l2/l2_input.h>
#include <vnet/l2/l2_bd.h>
#include <vnet/ip/ip.h>
#include <vnet/ip/ip6.h>
#include <vnet/ip/ip6_neighbor.h>
#if WITH_LIBSSL > 0
#include <vnet/sr/sr.h>
#endif
#include <vlib/vlib.h>
#include <vlib/unix/unix.h>
#include <vlibapi/api.h>
#include <vlibmemory/api.h>
#include <vnet/classify/input_acl.h>
#include <vnet/l2/l2_classify.h>
#include <vnet/map/map.h>
#include <vnet/ip/ip6_hop_by_hop.h>
#include <vnet/ip/ip_source_and_port_range_check.h>
#include <vnet/ip/punt.h>
#include <vnet/feature/feature.h>

#undef BIHASH_TYPE
#undef __included_bihash_template_h__
#include <vnet/l2/l2_fib.h>

#include <vpp/stats/stats.h>
#include <vpp/oam/oam.h>

#include <vnet/ethernet/ethernet.h>
#include <vnet/ethernet/arp_packet.h>
#include <vnet/interface.h>
#include <vnet/l2/l2_fib.h>
#include <vnet/l2/l2_bd.h>
#include <vpp/api/vpe_msg_enum.h>
#include <vnet/span/span.h>
#include <vnet/fib/ip6_fib.h>
#include <vnet/fib/ip4_fib.h>
#include <vnet/fib/fib_api.h>
#include <vnet/dpo/drop_dpo.h>
#include <vnet/dpo/receive_dpo.h>
#include <vnet/dpo/lookup_dpo.h>
#include <vnet/dpo/classify_dpo.h>
#include <vnet/dpo/ip_null_dpo.h>
#define vl_typedefs             /* define message structures */
#include <vpp/api/vpe_all_api_h.h>
#undef vl_typedefs
#define vl_endianfun            /* define message structures */
#include <vpp/api/vpe_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 <vpp/api/vpe_all_api_h.h>
#undef vl_printfun
#include <vlibapi/api_helper_macros.h>
#define foreach_vpe_api_msg                                             \
_(WANT_OAM_EVENTS, want_oam_events)                                     \
_(OAM_ADD_DEL, oam_add_del)                                             \
_(IS_ADDRESS_REACHABLE, is_address_reachable)                           \
_(SW_INTERFACE_SET_MPLS_ENABLE, sw_interface_set_mpls_enable)           \
_(SW_INTERFACE_SET_VPATH, sw_interface_set_vpath)                       \
_(SW_INTERFACE_SET_L2_XCONNECT, sw_interface_set_l2_xconnect)           \
_(SW_INTERFACE_SET_L2_BRIDGE, sw_interface_set_l2_bridge)               \
_(CREATE_VLAN_SUBIF, create_vlan_subif)                                 \
_(CREATE_SUBIF, create_subif)                                           \
_(PROXY_ARP_ADD_DEL, proxy_arp_add_del)                                 \
_(PROXY_ARP_INTFC_ENABLE_DISABLE, proxy_arp_intfc_enable_disable)       \
_(VNET_GET_SUMMARY_STATS, vnet_get_summary_stats)                       \
_(RESET_FIB, reset_fib)                                                 \
_(CREATE_LOOPBACK, create_loopback)                                     \
_(CREATE_LOOPBACK_INSTANCE, create_loopback_instance)                   \
_(CONTROL_PING, control_ping)                                           \
_(CLI_REQUEST, cli_request)                                             \
_(CLI_INBAND, cli_inband)                                               \
_(SET_ARP_NEIGHBOR_LIMIT, set_arp_neighbor_limit)                       \
_(L2_PATCH_ADD_DEL, l2_patch_add_del)                                   \
_(CLASSIFY_SET_INTERFACE_IP_TABLE, classify_set_interface_ip_table)     \
_(CLASSIFY_SET_INTERFACE_L2_TABLES, classify_set_interface_l2_tables)   \
_(GET_NODE_INDEX, get_node_index)                                       \
_(ADD_NODE_NEXT, add_node_next)                                         \
_(L2_INTERFACE_EFP_FILTER, l2_interface_efp_filter)                     \
_(SHOW_VERSION, show_version)                                           \
_(INTERFACE_NAME_RENUMBER, interface_name_renumber)                     \
_(WANT_IP4_ARP_EVENTS, want_ip4_arp_events)                             \
_(WANT_IP6_ND_EVENTS, want_ip6_nd_events)                               \
_(INPUT_ACL_SET_INTERFACE, input_acl_set_interface)                     \
_(DELETE_LOOPBACK, delete_loopback)                                     \
_(BD_IP_MAC_ADD_DEL, bd_ip_mac_add_del)                                 \
_(GET_NODE_GRAPH, get_node_graph)                                       \
_(IOAM_ENABLE, ioam_enable)                                             \
_(IOAM_DISABLE, ioam_disable)                                           \
_(GET_NEXT_INDEX, get_next_index)                                       \
_(PG_CREATE_INTERFACE, pg_create_interface)                             \
_(PG_CAPTURE, pg_capture)                                               \
_(PG_ENABLE_DISABLE, pg_enable_disable)                                 \
_(IP_SOURCE_AND_PORT_RANGE_CHECK_ADD_DEL,                               \
  ip_source_and_port_range_check_add_del)                               \
_(IP_SOURCE_AND_PORT_RANGE_CHECK_INTERFACE_ADD_DEL,                     \
  ip_source_and_port_range_check_interface_add_del)                     \
_(DELETE_SUBIF, delete_subif)                                           \
_(PUNT, punt)                                                           \
_(FEATURE_ENABLE_DISABLE, feature_enable_disable)

#define QUOTE_(x) #x
#define QUOTE(x) QUOTE_(x)
typedef enum
{
  RESOLVE_IP4_ADD_DEL_ROUTE = 1,
  RESOLVE_IP6_ADD_DEL_ROUTE,
} resolve_t;

static vlib_node_registration_t vpe_resolver_process_node;
vpe_api_main_t vpe_api_main;

static int arp_change_delete_callback (u32 pool_index, u8 * notused);
static int nd_change_delete_callback (u32 pool_index, u8 * notused);

/* Clean up all registrations belonging to the indicated client */
static clib_error_t *
memclnt_delete_callback (u32 client_index)
{
  vpe_api_main_t *vam = &vpe_api_main;
  vpe_client_registration_t *rp;
  uword *p;
  int stats_memclnt_delete_callback (u32 client_index);

  stats_memclnt_delete_callback (client_index);

#define _(a)                                                    \
    p = hash_get (vam->a##_registration_hash, client_index);    \
    if (p) {                                                    \
        rp = pool_elt_at_index (vam->a##_registrations, p[0]);  \
        pool_put (vam->a##_registrations, rp);                  \
        hash_unset (vam->a##_registration_hash, client_index);  \
    }
  foreach_registration_hash;
#undef _
  return 0;
}

VL_MSG_API_REAPER_FUNCTION (memclnt_delete_callback);

pub_sub_handler (oam_events, OAM_EVENTS);

#define RESOLUTION_EVENT 1
#define RESOLUTION_PENDING_EVENT 2
#define IP4_ARP_EVENT 3
#define IP6_ND_EVENT 4

int ip4_add_del_route_t_handler (vl_api_ip_add_del_route_t * mp);

int ip6_add_del_route_t_handler (vl_api_ip_add_del_route_t * mp);

void
handle_ip4_arp_event (u32 pool_index)
{
  vpe_api_main_t *vam = &vpe_api_main;
  vnet_main_t *vnm = vam->vnet_main;
  vlib_main_t *vm = vam->vlib_main;
  vl_api_ip4_arp_event_t *event;
  vl_api_ip4_arp_event_t *mp;
  unix_shared_memory_queue_t *q;

  /* Client can cancel, die, etc. */
  if (pool_is_free_index (vam->arp_events, pool_index))
    return;

  event = pool_elt_at_index (vam->arp_events, pool_index);

  q = vl_api_client_index_to_input_queue (event->client_index);
  if (!q)
    {
      (void) vnet_add_del_ip4_arp_change_event
        (vnm, arp_change_delete_callback,
         event->pid, &event->address,
         vpe_resolver_process_node.index, IP4_ARP_EVENT,
         ~0 /* pool index, notused */ , 0 /* is_add */ );
      return;
    }

  if (q->cursize < q->maxsize)
    {
      mp = vl_msg_api_alloc (sizeof (*mp));
      clib_memcpy (mp, event, sizeof (*mp));
      vl_msg_api_send_shmem (q, (u8 *) & mp);
    }
  else
    {
      static f64 last_time;
      /*
       * Throttle syslog msgs.
       * It's pretty tempting to just revoke the registration...
       */
      if (vlib_time_now (vm) > last_time + 10.0)
        {
          clib_warning ("arp event for %U to pid %d: queue stuffed!",
                        format_ip4_address, &event->address, event->pid);
          last_time = vlib_time_now (vm);
        }
    }
}

void
handle_ip6_nd_event (u32 pool_index)
{
  vpe_api_main_t *vam = &vpe_api_main;
  vnet_main_t *vnm = vam->vnet_main;
  vlib_main_t *vm = vam->vlib_main;
  vl_api_ip6_nd_event_t *event;
  vl_api_ip6_nd_event_t *mp;
  unix_shared_memory_queue_t *q;

  /* Client can cancel, die, etc. */
  if (pool_is_free_index (vam->nd_events, pool_index))
    return;

  event = pool_elt_at_index (vam->nd_events, pool_index);

  q = vl_api_client_index_to_input_queue (event->client_index);
  if (!q)
    {
      (void) vnet_add_del_ip6_nd_change_event
        (vnm, nd_change_delete_callback,
         event->pid, &event->address,
         vpe_resolver_process_node.index, IP6_ND_EVENT,
         ~0 /* pool index, notused */ , 0 /* is_add */ );
      return;
    }

  if (q->cursize < q->maxsize)
    {
      mp = vl_msg_api_alloc (sizeof (*mp));
      clib_memcpy (mp, event, sizeof (*mp));
      vl_msg_api_send_shmem (q, (u8 *) & mp);
    }
  else
    {
      static f64 last_time;
      /*
       * Throttle syslog msgs.
       * It's pretty tempting to just revoke the registration...
       */
      if (vlib_time_now (vm) > last_time + 10.0)
        {
          clib_warning ("ip6 nd event for %U to pid %d: queue stuffed!",
                        format_ip6_address, &event->address, event->pid);
          last_time = vlib_time_now (vm);
        }
    }
}

static uword
resolver_process (vlib_main_t * vm,
                  vlib_node_runtime_t * rt, vlib_frame_t * f)
{
  uword event_type;
  uword *event_data = 0;
  f64 timeout = 100.0;
  int i;

  while (1)
    {
      vlib_process_wait_for_event_or_clock (vm, timeout);

      event_type = vlib_process_get_events (vm, &event_data);

      switch (event_type)
        {
        case RESOLUTION_PENDING_EVENT:
          timeout = 1.0;
          break;

        case RESOLUTION_EVENT:
          clib_warning ("resolver: BOGUS TYPE");
          break;

        case IP4_ARP_EVENT:
          for (i = 0; i < vec_len (event_data); i++)
            handle_ip4_arp_event (event_data[i]);
          break;

        case IP6_ND_EVENT:
          for (i = 0; i < vec_len (event_data); i++)
            handle_ip6_nd_event (event_data[i]);
          break;

        case ~0:                /* timeout */
          break;
        }

      vec_reset_length (event_data);
    }
  return 0;                     /* or not */
}

/* *INDENT-OFF* */
VLIB_REGISTER_NODE (vpe_resolver_process_node,static) = {
  .function = resolver_process,
  .type = VLIB_NODE_TYPE_PROCESS,
  .name = "vpe-route-resolver-process",
};
/* *INDENT-ON* */

static void
vl_api_sw_interface_set_vpath_t_handler (vl_api_sw_interface_set_vpath_t * mp)
{
  vl_api_sw_interface_set_vpath_reply_t *rmp;
  int rv = 0;
  u32 sw_if_index = ntohl (mp->sw_if_index);

  VALIDATE_SW_IF_INDEX (mp);

  l2input_intf_bitmap_enable (sw_if_index, L2INPUT_FEAT_VPATH, mp->enable);
  vnet_feature_enable_disable ("ip4-unicast", "vpath-input-ip4",
                               sw_if_index, mp->enable, 0, 0);
  vnet_feature_enable_disable ("ip4-multicast", "vpath-input-ip4",
                               sw_if_index, mp->enable, 0, 0);
  vnet_feature_enable_disable ("ip6-unicast", "vpath-input-ip6",
                               sw_if_index, mp->enable, 0, 0);
  vnet_feature_enable_disable ("ip6-multicast", "vpath-input-ip6",
                               sw_if_index, mp->enable, 0, 0);

  BAD_SW_IF_INDEX_LABEL;

  REPLY_MACRO (VL_API_SW_INTERFACE_SET_VPATH_REPLY);
}

static void
  vl_api_sw_interface_set_l2_xconnect_t_handler
  (vl_api_sw_interface_set_l2_xconnect_t * mp)
{
  vl_api_sw_interface_set_l2_xconnect_reply_t *rmp;
  int rv = 0;
  u32 rx_sw_if_index = ntohl (mp->rx_sw_if_index);
  u32 tx_sw_if_index = ntohl (mp->tx_sw_if_index);
  vlib_main_t *vm = vlib_get_main ();
  vnet_main_t *vnm = vnet_get_main ();

  VALIDATE_RX_SW_IF_INDEX (mp);

  if (mp->enable)
    {
      VALIDATE_TX_SW_IF_INDEX (mp);
      rv = set_int_l2_mode (vm, vnm, MODE_L2_XC,
                            rx_sw_if_index, 0, 0, 0, tx_sw_if_index);
    }
  else
    {
      rv = set_int_l2_mode (vm, vnm, MODE_L3, rx_sw_if_index, 0, 0, 0, 0);
    }

  BAD_RX_SW_IF_INDEX_LABEL;
  BAD_TX_SW_IF_INDEX_LABEL;

  REPLY_MACRO (VL_API_SW_INTERFACE_SET_L2_XCONNECT_REPLY);
}

static void
  vl_api_sw_interface_set_l2_bridge_t_handler
  (vl_api_sw_interface_set_l2_bridge_t * mp)
{
  bd_main_t *bdm = &bd_main;
  vl_api_sw_interface_set_l2_bridge_reply_t *rmp;
  int rv = 0;
  u32 rx_sw_if_index = ntohl (mp->rx_sw_if_index);
  u32 bd_id = ntohl (mp->bd_id);
  u32 bd_index;
  u32 bvi = mp->bvi;
  u8 shg = mp->shg;
  vlib_main_t *vm = vlib_get_main ();
  vnet_main_t *vnm = vnet_get_main ();

  VALIDATE_RX_SW_IF_INDEX (mp);

  bd_index = bd_find_or_add_bd_index (bdm, bd_id);

  if (mp->enable)
    {
      //VALIDATE_TX_SW_IF_INDEX(mp);
      rv = set_int_l2_mode (vm, vnm, MODE_L2_BRIDGE,
                            rx_sw_if_index, bd_index, bvi, shg, 0);
    }
  else
    {
      rv = set_int_l2_mode (vm, vnm, MODE_L3, rx_sw_if_index, 0, 0, 0, 0);
    }

  BAD_RX_SW_IF_INDEX_LABEL;

  REPLY_MACRO (VL_API_SW_INTERFACE_SET_L2_BRIDGE_REPLY);
}

static void
vl_api_bd_ip_mac_add_del_t_handler (vl_api_bd_ip_mac_add_del_t * mp)
{
  bd_main_t *bdm = &bd_main;
  vl_api_bd_ip_mac_add_del_reply_t *rmp;
  int rv = 0;
  u32 bd_id = ntohl (mp->bd_id);
  u32 bd_index;
  uword *p;

  p = hash_get (bdm->bd_index_by_bd_id, bd_id);
  if (p == 0)
    {
      rv = VNET_API_ERROR_NO_SUCH_ENTRY;
      goto out;
    }

  bd_index = p[0];
  if (bd_add_del_ip_mac (bd_index, mp->ip_address,
                         mp->mac_address, mp->is_ipv6, mp->is_add))
    rv = VNET_API_ERROR_UNSPECIFIED;

out:
  REPLY_MACRO (VL_API_BD_IP_MAC_ADD_DEL_REPLY);
}

static void
vl_api_create_vlan_subif_t_handler (vl_api_create_vlan_subif_t * mp)
{
  vl_api_create_vlan_subif_reply_t *rmp;
  vnet_main_t *vnm = vnet_get_main ();
  u32 sw_if_index = (u32) ~ 0;
  vnet_hw_interface_t *hi;
  int rv = 0;
  u32 id;
  vnet_sw_interface_t template;
  uword *p;
  vnet_interface_main_t *im = &vnm->interface_main;
  u64 sup_and_sub_key;
  unix_shared_memory_queue_t *q;
  clib_error_t *error;

  VALIDATE_SW_IF_INDEX (mp);

  hi = vnet_get_sup_hw_interface (vnm, ntohl (mp->sw_if_index));

  if (hi->bond_info == VNET_HW_INTERFACE_BOND_INFO_SLAVE)
    {
      rv = VNET_API_ERROR_BOND_SLAVE_NOT_ALLOWED;
      goto out;
    }

  id = ntohl (mp->vlan_id);
  if (id == 0 || id > 4095)
    {
      rv = VNET_API_ERROR_INVALID_VLAN;
      goto out;
    }

  sup_and_sub_key = ((u64) (hi->sw_if_index) << 32) | (u64) id;

  p = hash_get_mem (im->sw_if_index_by_sup_and_sub, &sup_and_sub_key);
  if (p)
    {
      rv = VNET_API_ERROR_VLAN_ALREADY_EXISTS;
      goto out;
    }

  memset (&template, 0, sizeof (template));
  template.type = VNET_SW_INTERFACE_TYPE_SUB;
  template.sup_sw_if_index = hi->sw_if_index;
  template.sub.id = id;
  template.sub.eth.raw_flags = 0;
  template.sub.eth.flags.one_tag = 1;
  template.sub.eth.outer_vlan_id = id;
  template.sub.eth.flags.exact_match = 1;

  error = vnet_create_sw_interface (vnm, &template, &sw_if_index);
  if (error)
    {
      clib_error_report (error);
      rv = VNET_API_ERROR_INVALID_REGISTRATION;
      goto out;
    }

  u64 *kp = clib_mem_alloc (sizeof (*kp));
  *kp = sup_and_sub_key;

  hash_set (hi->sub_interface_sw_if_index_by_id, id, sw_if_index);
  hash_set_mem (im->sw_if_index_by_sup_and_sub, kp, sw_if_index);

  BAD_SW_IF_INDEX_LABEL;

out:
  q = vl_api_client_index_to_input_queue (mp->client_index);
  if (!q)
    return;

  rmp = vl_msg_api_alloc (sizeof (*rmp));
  rmp->_vl_msg_id = htons (VL_API_CREATE_VLAN_SUBIF_REPLY);
  rmp->context = mp->context;
  rmp->retval = htonl (rv);
  rmp->sw_if_index = htonl (sw_if_index);
  vl_msg_api_send_shmem (q, (u8 *) & rmp);
}

static void
vl_api_create_subif_t_handler (vl_api_create_subif_t * mp)
{
  vl_api_create_subif_reply_t *rmp;
  vnet_main_t *vnm = vnet_get_main ();
  u32 sw_if_index = ~0;
  int rv = 0;
  u32 sub_id;
  vnet_sw_interface_t *si;
  vnet_hw_interface_t *hi;
  vnet_sw_interface_t template;
  uword *p;
  vnet_interface_main_t *im = &vnm->interface_main;
  u64 sup_and_sub_key;
  clib_error_t *error;

  VALIDATE_SW_IF_INDEX (mp);

  si = vnet_get_sup_sw_interface (vnm, ntohl (mp->sw_if_index));
  hi = vnet_get_sup_hw_interface (vnm, ntohl (mp->sw_if_index));

  if (hi->bond_info == VNET_HW_INTERFACE_BOND_INFO_SLAVE)
    {
      rv = VNET_API_ERROR_BOND_SLAVE_NOT_ALLOWED;
      goto out;
    }

  sw_if_index = si->sw_if_index;
  sub_id = ntohl (mp->sub_id);

  sup_and_sub_key = ((u64) (sw_if_index) << 32) | (u64) sub_id;

  p = hash_get_mem (im->sw_if_index_by_sup_and_sub, &sup_and_sub_key);
  if (p)
    {
      if (CLIB_DEBUG > 0)
        clib_warning ("sup sw_if_index %d, sub id %d already exists\n",
                      sw_if_index, sub_id);
      rv = VNET_API_ERROR_SUBIF_ALREADY_EXISTS;
      goto out;
    }

  memset (&template, 0, sizeof (template));
  template.type = VNET_SW_INTERFACE_TYPE_SUB;
  template.sup_sw_if_index = sw_if_index;
  template.sub.id = sub_id;
  template.sub.eth.flags.no_tags = mp->no_tags;
  template.sub.eth.flags.one_tag = mp->one_tag;
  template.sub.eth.flags.two_tags = mp->two_tags;
  template.sub.eth.flags.dot1ad = mp->dot1ad;
  template.sub.eth.flags.exact_match = mp->exact_match;
  template.sub.eth.flags.default_sub = mp->default_sub;
  template.sub.eth.flags.outer_vlan_id_any = mp->outer_vlan_id_any;
  template.sub.eth.flags.inner_vlan_id_any = mp->inner_vlan_id_any;
  template.sub.eth.outer_vlan_id = ntohs (mp->outer_vlan_id);
  template.sub.eth.inner_vlan_id = ntohs (mp->inner_vlan_id);

  error = vnet_create_sw_interface (vnm, &template, &sw_if_index);
  if (error)
    {
      clib_error_report (error);
      rv = VNET_API_ERROR_SUBIF_CREATE_FAILED;
      goto out;
    }

  u64 *kp = clib_mem_alloc (sizeof (*kp));
  *kp = sup_and_sub_key;

  hash_set (hi->sub_interface_sw_if_index_by_id, sub_id, sw_if_index);
  hash_set_mem (im->sw_if_index_by_sup_and_sub, kp, sw_if_index);

  BAD_SW_IF_INDEX_LABEL;

out:

  /* *INDENT-OFF* */
  REPLY_MACRO2(VL_API_CREATE_SUBIF_REPLY,
  ({
    rmp->sw_if_index = ntohl(sw_if_index);
  }));
  /* *INDENT-ON* */
}

static void
vl_api_proxy_arp_add_del_t_handler (vl_api_proxy_arp_add_del_t * mp)
{
  vl_api_proxy_arp_add_del_reply_t *rmp;
  u32 fib_index;
  int rv;
  ip4_main_t *im = &ip4_main;
  stats_main_t *sm = &stats_main;
  int vnet_proxy_arp_add_del (ip4_address_t * lo_addr,
                              ip4_address_t * hi_addr,
                              u32 fib_index, int is_del);
  uword *p;

  dslock (sm, 1 /* release hint */ , 6 /* tag */ );

  p = hash_get (im->fib_index_by_table_id, ntohl (mp->vrf_id));

  if (!p)
    {
      rv = VNET_API_ERROR_NO_SUCH_FIB;
      goto out;
    }

  fib_index = p[0];

  rv = vnet_proxy_arp_add_del ((ip4_address_t *) mp->low_address,
                               (ip4_address_t *) mp->hi_address,
                               fib_index, mp->is_add == 0);

out:
  dsunlock (sm);
  REPLY_MACRO (VL_API_PROXY_ARP_ADD_DEL_REPLY);
}

static void
  vl_api_proxy_arp_intfc_enable_disable_t_handler
  (vl_api_proxy_arp_intfc_enable_disable_t * mp)
{
  int rv = 0;
  vnet_main_t *vnm = vnet_get_main ();
  vl_api_proxy_arp_intfc_enable_disable_reply_t *rmp;

  VALIDATE_SW_IF_INDEX (mp);

  vnet_sw_interface_t *si =
    vnet_get_sw_interface (vnm, ntohl (mp->sw_if_index));

  ASSERT (si);

  if (mp->enable_disable)
    si->flags |= VNET_SW_INTERFACE_FLAG_PROXY_ARP;
  else
    si->flags &= ~VNET_SW_INTERFACE_FLAG_PROXY_ARP;

  BAD_SW_IF_INDEX_LABEL;

out:
  REPLY_MACRO (VL_API_PROXY_ARP_INTFC_ENABLE_DISABLE_REPLY);
}

static void
vl_api_is_address_reachable_t_handler (vl_api_is_address_reachable_t * mp)
{
#if 0
  vpe_main_t *rm = &vpe_main;
  ip4_main_t *im4 = &ip4_main;
  ip6_main_t *im6 = &ip6_main;
  ip_lookup_main_t *lm;
  union
  {
    ip4_address_t ip4;
    ip6_address_t ip6;
  } addr;
  u32 adj_index, sw_if_index;
  vl_api_is_address_reachable_t *rmp;
  ip_adjacency_t *adj;
  unix_shared_memory_queue_t *q;

  q = vl_api_client_index_to_input_queue (mp->client_index);
  if (!q)
    {
      increment_missing_api_client_counter (rm->vlib_main);
      return;
    }

  rmp = vl_msg_api_alloc (sizeof (*rmp));
  clib_memcpy (rmp, mp, sizeof (*rmp));

  sw_if_index = mp->next_hop_sw_if_index;
  clib_memcpy (&addr, mp->address, sizeof (addr));
  if (mp->is_ipv6)
    {
      lm = &im6->lookup_main;
      adj_index = ip6_fib_lookup (im6, sw_if_index, &addr.ip6);
    }
  else
    {
      lm = &im4->lookup_main;
      // FIXME NOT an ADJ
      adj_index = ip4_fib_lookup (im4, sw_if_index, &addr.ip4);
    }
  if (adj_index == ~0)
    {
      rmp->is_error = 1;
      goto send;
    }
  adj = ip_get_adjacency (lm, adj_index);

  if (adj->lookup_next_index == IP_LOOKUP_NEXT_REWRITE
      && adj->rewrite_header.sw_if_index == sw_if_index)
    {
      rmp->is_known = 1;
    }
  else
    {
      if (adj->lookup_next_index == IP_LOOKUP_NEXT_ARP
          && adj->rewrite_header.sw_if_index == sw_if_index)
        {
          if (mp->is_ipv6)
            ip6_probe_neighbor (rm->vlib_main, &addr.ip6, sw_if_index);
          else
            ip4_probe_neighbor (rm->vlib_main, &addr.ip4, sw_if_index);
        }
      else if (adj->lookup_next_index == IP_LOOKUP_NEXT_DROP)
        {
          rmp->is_known = 1;
          goto send;
        }
      rmp->is_known = 0;
    }

send:
  vl_msg_api_send_shmem (q, (u8 *) & rmp);
#endif
}

static void
  vl_api_sw_interface_set_mpls_enable_t_handler
  (vl_api_sw_interface_set_mpls_enable_t * mp)
{
  vl_api_sw_interface_set_mpls_enable_reply_t *rmp;
  int rv = 0;

  VALIDATE_SW_IF_INDEX (mp);

  mpls_sw_interface_enable_disable (&mpls_main,
                                    ntohl (mp->sw_if_index), mp->enable);

  BAD_SW_IF_INDEX_LABEL;
  REPLY_MACRO (VL_API_SW_INTERFACE_SET_MPLS_ENABLE_REPLY);
}

void
send_oam_event (oam_target_t * t)
{
  vpe_api_main_t *vam = &vpe_api_main;
  unix_shared_memory_queue_t *q;
  vpe_client_registration_t *reg;
  vl_api_oam_event_t *mp;

  /* *INDENT-OFF* */
  pool_foreach(reg, vam->oam_events_registrations,
  ({
    q = vl_api_client_index_to_input_queue (reg->client_index);
    if (q)
      {
        mp = vl_msg_api_alloc (sizeof (*mp));
        mp->_vl_msg_id = ntohs (VL_API_OAM_EVENT);
        clib_memcpy (mp->dst_address, &t->dst_address,
                     sizeof (mp->dst_address));
        mp->state = t->state;
        vl_msg_api_send_shmem (q, (u8 *)&mp);
      }
  }));
  /* *INDENT-ON* */
}

static void
vl_api_oam_add_del_t_handler (vl_api_oam_add_del_t * mp)
{
  vl_api_oam_add_del_reply_t *rmp;
  int rv;

  rv = vpe_oam_add_del_target ((ip4_address_t *) mp->src_address,
                               (ip4_address_t *) mp->dst_address,
                               ntohl (mp->vrf_id), (int) (mp->is_add));

  REPLY_MACRO (VL_API_OAM_ADD_DEL_REPLY);
}

static void
vl_api_vnet_get_summary_stats_t_handler (vl_api_vnet_get_summary_stats_t * mp)
{
  stats_main_t *sm = &stats_main;
  vnet_interface_main_t *im = sm->interface_main;
  vl_api_vnet_summary_stats_reply_t *rmp;
  vlib_combined_counter_main_t *cm;
  vlib_counter_t v;
  int i, which;
  u64 total_pkts[VLIB_N_RX_TX];
  u64 total_bytes[VLIB_N_RX_TX];

  unix_shared_memory_queue_t *q =
    vl_api_client_index_to_input_queue (mp->client_index);

  if (!q)
    return;

  rmp = vl_msg_api_alloc (sizeof (*rmp));
  rmp->_vl_msg_id = ntohs (VL_API_VNET_SUMMARY_STATS_REPLY);
  rmp->context = mp->context;
  rmp->retval = 0;

  memset (total_pkts, 0, sizeof (total_pkts));
  memset (total_bytes, 0, sizeof (total_bytes));

  vnet_interface_counter_lock (im);

  vec_foreach (cm, im->combined_sw_if_counters)
  {
    which = cm - im->combined_sw_if_counters;

    for (i = 0; i < vlib_combined_counter_n_counters (cm); i++)
      {
        vlib_get_combined_counter (cm, i, &v);
        total_pkts[which] += v.packets;
        total_bytes[which] += v.bytes;
      }
  }
  vnet_interface_counter_unlock (im);

  rmp->total_pkts[VLIB_RX] = clib_host_to_net_u64 (total_pkts[VLIB_RX]);
  rmp->total_bytes[VLIB_RX] = clib_host_to_net_u64 (total_bytes[VLIB_RX]);
  rmp->total_pkts[VLIB_TX] = clib_host_to_net_u64 (total_pkts[VLIB_TX]);
  rmp->total_bytes[VLIB_TX] = clib_host_to_net_u64 (total_bytes[VLIB_TX]);
  rmp->vector_rate =
    clib_host_to_net_u64 (vlib_last_vector_length_per_node (sm->vlib_main));

  vl_msg_api_send_shmem (q, (u8 *) & rmp);
}

/* *INDENT-OFF* */
typedef CLIB_PACKED (struct {
  ip4_address_t address;
  u32 address_length: 6;
  u32 index:26;
}) ip4_route_t;
/* *INDENT-ON* */

static int
ip4_reset_fib_t_handler (vl_api_reset_fib_t * mp)
{
  vnet_main_t *vnm = vnet_get_main ();
  vnet_interface_main_t *im = &vnm->interface_main;
  ip4_main_t *im4 = &ip4_main;
  static u32 *sw_if_indices_to_shut;
  stats_main_t *sm = &stats_main;
  fib_table_t *fib_table;
  ip4_fib_t *fib;
  u32 sw_if_index;
  int i;
  int rv = VNET_API_ERROR_NO_SUCH_FIB;
  u32 target_fib_id = ntohl (mp->vrf_id);

  dslock (sm, 1 /* release hint */ , 8 /* tag */ );

  /* *INDENT-OFF* */
  pool_foreach (fib_table, im4->fibs,
  ({
    fib = &fib_table->v4;
    vnet_sw_interface_t * si;

    if (fib->table_id != target_fib_id)
      continue;

    /* remove any mpls encap/decap labels */
    mpls_fib_reset_labels (fib->table_id);

    /* remove any proxy arps in this fib */
    vnet_proxy_arp_fib_reset (fib->table_id);

    /* Set the flow hash for this fib to the default */
    vnet_set_ip4_flow_hash (fib->table_id, IP_FLOW_HASH_DEFAULT);

    vec_reset_length (sw_if_indices_to_shut);

    /* Shut down interfaces in this FIB / clean out intfc routes */
    pool_foreach (si, im->sw_interfaces,
    ({
      u32 sw_if_index = si->sw_if_index;

      if (sw_if_index < vec_len (im4->fib_index_by_sw_if_index)
          && (im4->fib_index_by_sw_if_index[si->sw_if_index] ==
              fib->index))
        vec_add1 (sw_if_indices_to_shut, si->sw_if_index);
    }));

    for (i = 0; i < vec_len (sw_if_indices_to_shut); i++) {
      sw_if_index = sw_if_indices_to_shut[i];

      u32 flags = vnet_sw_interface_get_flags (vnm, sw_if_index);
      flags &= ~(VNET_SW_INTERFACE_FLAG_ADMIN_UP);
      vnet_sw_interface_set_flags (vnm, sw_if_index, flags);
    }

    fib_table_flush(fib->index, FIB_PROTOCOL_IP4, FIB_SOURCE_API);

    rv = 0;
    break;
    })); /* pool_foreach (fib) */
    /* *INDENT-ON* */

  dsunlock (sm);
  return rv;
}

static int
ip6_reset_fib_t_handler (vl_api_reset_fib_t * mp)
{
  vnet_main_t *vnm = vnet_get_main ();
  vnet_interface_main_t *im = &vnm->interface_main;
  ip6_main_t *im6 = &ip6_main;
  stats_main_t *sm = &stats_main;
  static u32 *sw_if_indices_to_shut;
  fib_table_t *fib_table;
  ip6_fib_t *fib;
  u32 sw_if_index;
  int i;
  int rv = VNET_API_ERROR_NO_SUCH_FIB;
  u32 target_fib_id = ntohl (mp->vrf_id);

  dslock (sm, 1 /* release hint */ , 9 /* tag */ );

  /* *INDENT-OFF* */
  pool_foreach (fib_table, im6->fibs,
  ({
    vnet_sw_interface_t * si;
    fib = &(fib_table->v6);

    if (fib->table_id != target_fib_id)
      continue;

    vec_reset_length (sw_if_indices_to_shut);

    /* Shut down interfaces in this FIB / clean out intfc routes */
    pool_foreach (si, im->sw_interfaces,
    ({
      if (im6->fib_index_by_sw_if_index[si->sw_if_index] ==
          fib->index)
        vec_add1 (sw_if_indices_to_shut, si->sw_if_index);
    }));

    for (i = 0; i < vec_len (sw_if_indices_to_shut); i++) {
      sw_if_index = sw_if_indices_to_shut[i];

      u32 flags = vnet_sw_interface_get_flags (vnm, sw_if_index);
      flags &= ~(VNET_SW_INTERFACE_FLAG_ADMIN_UP);
      vnet_sw_interface_set_flags (vnm, sw_if_index, flags);
    }

    fib_table_flush(fib->index, FIB_PROTOCOL_IP6, FIB_SOURCE_API);

    rv = 0;
    break;
  })); /* pool_foreach (fib) */
  /* *INDENT-ON* */

  dsunlock (sm);
  return rv;
}

static void
vl_api_reset_fib_t_handler (vl_api_reset_fib_t * mp)
{
  int rv;
  vl_api_reset_fib_reply_t *rmp;

  if (mp->is_ipv6)
    rv = ip6_reset_fib_t_handler (mp);
  else
    rv = ip4_reset_fib_t_handler (mp);

  REPLY_MACRO (VL_API_RESET_FIB_REPLY);
}

static void
vl_api_create_loopback_t_handler (vl_api_create_loopback_t * mp)
{
  vl_api_create_loopback_reply_t *rmp;
  u32 sw_if_index;
  int rv;

  rv = vnet_create_loopback_interface (&sw_if_index, mp->mac_address, 0, 0);

  /* *INDENT-OFF* */
  REPLY_MACRO2(VL_API_CREATE_LOOPBACK_REPLY,
  ({
    rmp->sw_if_index = ntohl (sw_if_index);
  }));
  /* *INDENT-ON* */
}

static void vl_api_create_loopback_instance_t_handler
  (vl_api_create_loopback_instance_t * mp)
{
  vl_api_create_loopback_instance_reply_t *rmp;
  u32 sw_if_index;
  u8 is_specified = mp->is_specified;
  u32 user_instance = ntohl (mp->user_instance);
  int rv;

  rv = vnet_create_loopback_interface (&sw_if_index, mp->mac_address,
                                       is_specified, user_instance);

  /* *INDENT-OFF* */
  REPLY_MACRO2(VL_API_CREATE_LOOPBACK_INSTANCE_REPLY,
  ({
    rmp->sw_if_index = ntohl (sw_if_index);
  }));
  /* *INDENT-ON* */
}

static void
vl_api_delete_loopback_t_handler (vl_api_delete_loopback_t * mp)
{
  vl_api_delete_loopback_reply_t *rmp;
  u32 sw_if_index;
  int rv;

  sw_if_index = ntohl (mp->sw_if_index);
  rv = vnet_delete_loopback_interface (sw_if_index);

  REPLY_MACRO (VL_API_DELETE_LOOPBACK_REPLY);
}

static void
vl_api_control_ping_t_handler (vl_api_control_ping_t * mp)
{
  vl_api_control_ping_reply_t *rmp;
  int rv = 0;

  /* *INDENT-OFF* */
  REPLY_MACRO2(VL_API_CONTROL_PING_REPLY,
  ({
    rmp->vpe_pid = ntohl (getpid());
  }));
  /* *INDENT-ON* */
}

static void
shmem_cli_output (uword arg, u8 * buffer, uword buffer_bytes)
{
  u8 **shmem_vecp = (u8 **) arg;
  u8 *shmem_vec;
  void *oldheap;
  api_main_t *am = &api_main;
  u32 offset;

  shmem_vec = *shmem_vecp;

  offset = vec_len (shmem_vec);

  pthread_mutex_lock (&am->vlib_rp->mutex);
  oldheap = svm_push_data_heap (am->vlib_rp);

  vec_validate (shmem_vec, offset + buffer_bytes - 1);

  clib_memcpy (shmem_vec + offset, buffer, buffer_bytes);

  svm_pop_heap (oldheap);
  pthread_mutex_unlock (&am->vlib_rp->mutex);

  *shmem_vecp = shmem_vec;
}


static void
vl_api_cli_request_t_handler (vl_api_cli_request_t * mp)
{
  vl_api_cli_reply_t *rp;
  unix_shared_memory_queue_t *q;
  vlib_main_t *vm = vlib_get_main ();
  api_main_t *am = &api_main;
  unformat_input_t input;
  u8 *shmem_vec = 0;
  void *oldheap;

  q = vl_api_client_index_to_input_queue (mp->client_index);
  if (!q)
    return;

  rp = vl_msg_api_alloc (sizeof (*rp));
  rp->_vl_msg_id = ntohs (VL_API_CLI_REPLY);
  rp->context = mp->context;

  unformat_init_vector (&input, (u8 *) (uword) mp->cmd_in_shmem);

  vlib_cli_input (vm, &input, shmem_cli_output, (uword) & shmem_vec);

  pthread_mutex_lock (&am->vlib_rp->mutex);
  oldheap = svm_push_data_heap (am->vlib_rp);

  vec_add1 (shmem_vec, 0);

  svm_pop_heap (oldheap);
  pthread_mutex_unlock (&am->vlib_rp->mutex);

  rp->reply_in_shmem = (uword) shmem_vec;

  vl_msg_api_send_shmem (q, (u8 *) & rp);
}

static void
inband_cli_output (uword arg, u8 * buffer, uword buffer_bytes)
{
  u8 **mem_vecp = (u8 **) arg;
  u8 *mem_vec = *mem_vecp;
  u32 offset = vec_len (mem_vec);

  vec_validate (mem_vec, offset + buffer_bytes - 1);
  clib_memcpy (mem_vec + offset, buffer, buffer_bytes);
  *mem_vecp = mem_vec;
}

static void
vl_api_cli_inband_t_handler (vl_api_cli_inband_t * mp)
{
  vl_api_cli_inband_reply_t *rmp;
  int rv = 0;
  unix_shared_memory_queue_t *q;
  vlib_main_t *vm = vlib_get_main ();
  unformat_input_t input;
  u8 *out_vec = 0;

  q = vl_api_client_index_to_input_queue (mp->client_index);
  if (!q)
    return;

  unformat_init_string (&input, (char *) mp->cmd, ntohl (mp->length));
  vlib_cli_input (vm, &input, inband_cli_output, (uword) & out_vec);

  u32 len = vec_len (out_vec);
  /* *INDENT-OFF* */
  REPLY_MACRO3(VL_API_CLI_INBAND_REPLY, len,
  ({
    rmp->length = htonl (len);
    clib_memcpy (rmp->reply, out_vec, len);
  }));
  /* *INDENT-ON* */
  vec_free (out_vec);
}

static void
vl_api_set_arp_neighbor_limit_t_handler (vl_api_set_arp_neighbor_limit_t * mp)
{
  int rv;
  vl_api_set_arp_neighbor_limit_reply_t *rmp;
  vnet_main_t *vnm = vnet_get_main ();
  clib_error_t *error;

  vnm->api_errno = 0;

  if (mp->is_ipv6)
    error = ip6_set_neighbor_limit (ntohl (mp->arp_neighbor_limit));
  else
    error = ip4_set_arp_limit (ntohl (mp->arp_neighbor_limit));

  if (error)
    {
      clib_error_report (error);
      rv = VNET_API_ERROR_UNSPECIFIED;
    }
  else
    {
      rv = vnm->api_errno;
    }

  REPLY_MACRO (VL_API_SET_ARP_NEIGHBOR_LIMIT_REPLY);
}

static void vl_api_classify_set_interface_ip_table_t_handler
  (vl_api_classify_set_interface_ip_table_t * mp)
{
  vlib_main_t *vm = vlib_get_main ();
  vl_api_classify_set_interface_ip_table_reply_t *rmp;
  int rv;

  VALIDATE_SW_IF_INDEX (mp);

  u32 table_index = ntohl (mp->table_index);
  u32 sw_if_index = ntohl (mp->sw_if_index);

  if (mp->is_ipv6)
    rv = vnet_set_ip6_classify_intfc (vm, sw_if_index, table_index);
  else
    rv = vnet_set_ip4_classify_intfc (vm, sw_if_index, table_index);

  BAD_SW_IF_INDEX_LABEL;

  REPLY_MACRO (VL_API_CLASSIFY_SET_INTERFACE_IP_TABLE_REPLY);
}

static void vl_api_classify_set_interface_l2_tables_t_handler
  (vl_api_classify_set_interface_l2_tables_t * mp)
{
  vl_api_classify_set_interface_l2_tables_reply_t *rmp;
  int rv;
  u32 sw_if_index, ip4_table_index, ip6_table_index, other_table_index;
  int enable;

  ip4_table_index = ntohl (mp->ip4_table_index);
  ip6_table_index = ntohl (mp->ip6_table_index);
  other_table_index = ntohl (mp->other_table_index);
  sw_if_index = ntohl (mp->sw_if_index);

  VALIDATE_SW_IF_INDEX (mp);

  if (mp->is_input)
    rv = vnet_l2_input_classify_set_tables (sw_if_index, ip4_table_index,
                                            ip6_table_index,
                                            other_table_index);
  else
    rv = vnet_l2_output_classify_set_tables (sw_if_index, ip4_table_index,
                                             ip6_table_index,
                                             other_table_index);

  if (rv == 0)
    {
      if (ip4_table_index != ~0 || ip6_table_index != ~0
          || other_table_index != ~0)
        enable = 1;
      else
        enable = 0;

      if (mp->is_input)
        vnet_l2_input_classify_enable_disable (sw_if_index, enable);
      else
        vnet_l2_output_classify_enable_disable (sw_if_index, enable);
    }

  BAD_SW_IF_INDEX_LABEL;

  REPLY_MACRO (VL_API_CLASSIFY_SET_INTERFACE_L2_TABLES_REPLY);
}

extern void l2_efp_filter_configure (vnet_main_t * vnet_main,
                                     u32 sw_if_index, u32 enable);

static void
vl_api_l2_interface_efp_filter_t_handler (vl_api_l2_interface_efp_filter_t *
                                          mp)
{
  int rv;
  vl_api_l2_interface_efp_filter_reply_t *rmp;
  vnet_main_t *vnm = vnet_get_main ();

  // enable/disable the feature
  l2_efp_filter_configure (vnm, mp->sw_if_index, mp->enable_disable);
  rv = vnm->api_errno;

  REPLY_MACRO (VL_API_L2_INTERFACE_EFP_FILTER_REPLY);
}

static void
vl_api_show_version_t_handler (vl_api_show_version_t * mp)
{
  vl_api_show_version_reply_t *rmp;
  int rv = 0;
  char *vpe_api_get_build_directory (void);
  char *vpe_api_get_version (void);
  char *vpe_api_get_build_date (void);

  unix_shared_memory_queue_t *q =
    vl_api_client_index_to_input_queue (mp->client_index);

  if (!q)
    return;

  /* *INDENT-OFF* */
  REPLY_MACRO2(VL_API_SHOW_VERSION_REPLY,
  ({
    strncpy ((char *) rmp->program, "vpe", ARRAY_LEN(rmp->program)-1);
    strncpy ((char *) rmp->build_directory, vpe_api_get_build_directory(),
             ARRAY_LEN(rmp->build_directory)-1);
    strncpy ((char *) rmp->version, vpe_api_get_version(),
             ARRAY_LEN(rmp->version)-1);
    strncpy ((char *) rmp->build_date, vpe_api_get_build_date(),
             ARRAY_LEN(rmp->build_date)-1);
  }));
  /* *INDENT-ON* */
}

static void
vl_api_get_node_index_t_handler (vl_api_get_node_index_t * mp)
{
  vlib_main_t *vm = vlib_get_main ();
  vl_api_get_node_index_reply_t *rmp;
  vlib_node_t *n;
  int rv = 0;
  u32 node_index = ~0;

  n = vlib_get_node_by_name (vm, mp->node_name);

  if (n == 0)
    rv = VNET_API_ERROR_NO_SUCH_NODE;
  else
    node_index = n->index;

  /* *INDENT-OFF* */
  REPLY_MACRO2(VL_API_GET_NODE_INDEX_REPLY,
  ({
    rmp->node_index = ntohl(node_index);
  }));
  /* *INDENT-ON* */
}

static void
vl_api_get_next_index_t_handler (vl_api_get_next_index_t * mp)
{
  vlib_main_t *vm = vlib_get_main ();
  vl_api_get_next_index_reply_t *rmp;
  vlib_node_t *node, *next_node;
  int rv = 0;
  u32 next_node_index = ~0, next_index = ~0;
  uword *p;

  node = vlib_get_node_by_name (vm, mp->node_name);

  if (node == 0)
    {
      rv = VNET_API_ERROR_NO_SUCH_NODE;
      goto out;
    }

  next_node = vlib_get_node_by_name (vm, mp->next_name);

  if (next_node == 0)
    {
      rv = VNET_API_ERROR_NO_SUCH_NODE2;
      goto out;
    }
  else
    next_node_index = next_node->index;

  p = hash_get (node->next_slot_by_node, next_node_index);

  if (p == 0)
    {
      rv = VNET_API_ERROR_NO_SUCH_ENTRY;
      goto out;
    }
  else
    next_index = p[0];

out:
  /* *INDENT-OFF* */
  REPLY_MACRO2(VL_API_GET_NEXT_INDEX_REPLY,
  ({
    rmp->next_index = ntohl(next_index);
  }));
  /* *INDENT-ON* */
}

static void
vl_api_add_node_next_t_handler (vl_api_add_node_next_t * mp)
{
  vlib_main_t *vm = vlib_get_main ();
  vl_api_add_node_next_reply_t *rmp;
  vlib_node_t *n, *next;
  int rv = 0;
  u32 next_index = ~0;

  n = vlib_get_node_by_name (vm, mp->node_name);

  if (n == 0)
    {
      rv = VNET_API_ERROR_NO_SUCH_NODE;
      goto out;
    }

  next = vlib_get_node_by_name (vm, mp->next_name);

  if (next == 0)
    rv = VNET_API_ERROR_NO_SUCH_NODE2;
  else
    next_index = vlib_node_add_next (vm, n->index, next->index);

out:
  /* *INDENT-OFF* */
  REPLY_MACRO2(VL_API_GET_NODE_INDEX_REPLY,
  ({
    rmp->next_index = ntohl(next_index);
  }));
  /* *INDENT-ON* */
}

static void
vl_api_l2_patch_add_del_t_handler (vl_api_l2_patch_add_del_t * mp)
{
  extern int vnet_l2_patch_add_del (u32 rx_sw_if_index, u32 tx_sw_if_index,
                                    int is_add);
  vl_api_l2_patch_add_del_reply_t *rmp;
  int vnet_l2_patch_add_del (u32 rx_sw_if_index, u32 tx_sw_if_index,
                             int is_add);
  int rv = 0;

  VALIDATE_RX_SW_IF_INDEX (mp);
  VALIDATE_TX_SW_IF_INDEX (mp);

  rv = vnet_l2_patch_add_del (ntohl (mp->rx_sw_if_index),
                              ntohl (mp->tx_sw_if_index),
                              (int) (mp->is_add != 0));

  BAD_RX_SW_IF_INDEX_LABEL;
  BAD_TX_SW_IF_INDEX_LABEL;

  REPLY_MACRO (VL_API_L2_PATCH_ADD_DEL_REPLY);
}

static void
vl_api_interface_name_renumber_t_handler (vl_api_interface_name_renumber_t *
                                          mp)
{
  vl_api_interface_name_renumber_reply_t *rmp;
  int rv = 0;

  VALIDATE_SW_IF_INDEX (mp);

  rv = vnet_interface_name_renumber
    (ntohl (mp->sw_if_index), ntohl (mp->new_show_dev_instance));

  BAD_SW_IF_INDEX_LABEL;

  REPLY_MACRO (VL_API_INTERFACE_NAME_RENUMBER_REPLY);
}

static int
arp_change_data_callback (u32 pool_index, u8 * new_mac,
                          u32 sw_if_index, u32 address)
{
  vpe_api_main_t *am = &vpe_api_main;
  vlib_main_t *vm = am->vlib_main;
  vl_api_ip4_arp_event_t *event;
  static f64 arp_event_last_time;
  f64 now = vlib_time_now (vm);

  if (pool_is_free_index (am->arp_events, pool_index))
    return 1;

  event = pool_elt_at_index (am->arp_events, pool_index);
  /* *INDENT-OFF* */
  if (memcmp (&event->new_mac, new_mac, sizeof (event->new_mac)))
    {
      clib_memcpy (event->new_mac, new_mac, sizeof (event->new_mac));
    }
  else
    {                           /* same mac */
      if (sw_if_index == ntohl(event->sw_if_index) &&
          (!event->mac_ip ||
           /* for BD case, also check IP address with 10 sec timeout */
           (address == event->address &&
            (now - arp_event_last_time) < 10.0)))
        return 1;
    }
  /* *INDENT-ON* */

  arp_event_last_time = now;
  event->sw_if_index = htonl (sw_if_index);
  if (event->mac_ip)
    event->address = address;
  return 0;
}

static int
nd_change_data_callback (u32 pool_index, u8 * new_mac,
                         u32 sw_if_index, ip6_address_t * address)
{
  vpe_api_main_t *am = &vpe_api_main;
  vlib_main_t *vm = am->vlib_main;
  vl_api_ip6_nd_event_t *event;
  static f64 nd_event_last_time;
  f64 now = vlib_time_now (vm);

  if (pool_is_free_index (am->nd_events, pool_index))
    return 1;

  event = pool_elt_at_index (am->nd_events, pool_index);

  /* *INDENT-OFF* */
  if (memcmp (&event->new_mac, new_mac, sizeof (event->new_mac)))
    {
      clib_memcpy (event->new_mac, new_mac, sizeof (event->new_mac));
    }
  else
    {                           /* same mac */
      if (sw_if_index == ntohl(event->sw_if_index) &&
          (!event->mac_ip ||
           /* for BD case, also check IP address with 10 sec timeout */
           (ip6_address_is_equal (address,
                                  (ip6_address_t *) event->address) &&
            (now - nd_event_last_time) < 10.0)))
        return 1;
    }
  /* *INDENT-ON* */

  nd_event_last_time = now;
  event->sw_if_index = htonl (sw_if_index);
  if (event->mac_ip)
    clib_memcpy (event->address, address, sizeof (event->address));
  return 0;
}

static int
arp_change_delete_callback (u32 pool_index, u8 * notused)
{
  vpe_api_main_t *am = &vpe_api_main;

  if (pool_is_free_index (am->arp_events, pool_index))
    return 1;

  pool_put_index (am->arp_events, pool_index);
  return 0;
}

static int
nd_change_delete_callback (u32 pool_index, u8 * notused)
{
  vpe_api_main_t *am = &vpe_api_main;

  if (pool_is_free_index (am->nd_events, pool_index))
    return 1;

  pool_put_index (am->nd_events, pool_index);
  return 0;
}

static void
vl_api_want_ip4_arp_events_t_handler (vl_api_want_ip4_arp_events_t * mp)
{
  vpe_api_main_t *am = &vpe_api_main;
  vnet_main_t *vnm = vnet_get_main ();
  vl_api_want_ip4_arp_events_reply_t *rmp;
  vl_api_ip4_arp_event_t *event;
  int rv;

  if (mp->enable_disable)
    {
      pool_get (am->arp_events, event);
      memset (event, 0, sizeof (*event));

      event->_vl_msg_id = ntohs (VL_API_IP4_ARP_EVENT);
      event->client_index = mp->client_index;
      event->context = mp->context;
      event->address = mp->address;
      event->pid = mp->pid;
      if (mp->address == 0)
        event->mac_ip = 1;

      rv = vnet_add_del_ip4_arp_change_event
        (vnm, arp_change_data_callback,
         mp->pid, &mp->address /* addr, in net byte order */ ,
         vpe_resolver_process_node.index,
         IP4_ARP_EVENT, event - am->arp_events, 1 /* is_add */ );
    }
  else
    {
      rv = vnet_add_del_ip4_arp_change_event
        (vnm, arp_change_delete_callback,
         mp->pid, &mp->address /* addr, in net byte order */ ,
         vpe_resolver_process_node.index,
         IP4_ARP_EVENT, ~0 /* pool index */ , 0 /* is_add */ );
    }
  REPLY_MACRO (VL_API_WANT_IP4_ARP_EVENTS_REPLY);
}

static void
vl_api_want_ip6_nd_events_t_handler (vl_api_want_ip6_nd_events_t * mp)
{
  vpe_api_main_t *am = &vpe_api_main;
  vnet_main_t *vnm = vnet_get_main ();
  vl_api_want_ip6_nd_events_reply_t *rmp;
  vl_api_ip6_nd_event_t *event;
  int rv;

  if (mp->enable_disable)
    {
      pool_get (am->nd_events, event);
      memset (event, 0, sizeof (*event));

      event->_vl_msg_id = ntohs (VL_API_IP6_ND_EVENT);
      event->client_index = mp->client_index;
      event->context = mp->context;
      clib_memcpy (event->address, mp->address, 16);
      event->pid = mp->pid;
      if (ip6_address_is_zero ((ip6_address_t *) mp->address))
        event->mac_ip = 1;

      rv = vnet_add_del_ip6_nd_change_event
        (vnm, nd_change_data_callback,
         mp->pid, mp->address /* addr, in net byte order */ ,
         vpe_resolver_process_node.index,
         IP6_ND_EVENT, event - am->nd_events, 1 /* is_add */ );
    }
  else
    {
      rv = vnet_add_del_ip6_nd_change_event
        (vnm, nd_change_delete_callback,
         mp->pid, mp->address /* addr, in net byte order */ ,
         vpe_resolver_process_node.index,
         IP6_ND_EVENT, ~0 /* pool index */ , 0 /* is_add */ );
    }
  REPLY_MACRO (VL_API_WANT_IP6_ND_EVENTS_REPLY);
}

static void vl_api_input_acl_set_interface_t_handler
  (vl_api_input_acl_set_interface_t * mp)
{
  vlib_main_t *vm = vlib_get_main ();
  vl_api_input_acl_set_interface_reply_t *rmp;
  int rv;

  VALIDATE_SW_IF_INDEX (mp);

  u32 ip4_table_index = ntohl (mp->ip4_table_index);
  u32 ip6_table_index = ntohl (mp->ip6_table_index);
  u32 l2_table_index = ntohl (mp->l2_table_index);
  u32 sw_if_index = ntohl (mp->sw_if_index);

  rv = vnet_set_input_acl_intfc (vm, sw_if_index, ip4_table_index,
                                 ip6_table_index, l2_table_index, mp->is_add);

  BAD_SW_IF_INDEX_LABEL;

  REPLY_MACRO (VL_API_INPUT_ACL_SET_INTERFACE_REPLY);
}

static void
vl_api_get_node_graph_t_handler (vl_api_get_node_graph_t * mp)
{
  int rv = 0;
  u8 *vector = 0;
  api_main_t *am = &api_main;
  vlib_main_t *vm = vlib_get_main ();
  void *oldheap;
  vl_api_get_node_graph_reply_t *rmp;

  pthread_mutex_lock (&am->vlib_rp->mutex);
  oldheap = svm_push_data_heap (am->vlib_rp);

  /*
   * Keep the number of memcpy ops to a minimum (e.g. 1).
   */
  vec_validate (vector, 16384);
  vec_reset_length (vector);

  /* $$$$ FIXME */
  vector = vlib_node_serialize (&vm->node_main, vector,
                                (u32) ~ 0 /* all threads */ ,
                                1 /* include nexts */ ,
                                1 /* include stats */ );

  svm_pop_heap (oldheap);
  pthread_mutex_unlock (&am->vlib_rp->mutex);

  /* *INDENT-OFF* */
  REPLY_MACRO2(VL_API_GET_NODE_GRAPH_REPLY,
  ({
    rmp->reply_in_shmem = (uword) vector;
  }));
  /* *INDENT-ON* */
}

static void
vl_api_ioam_enable_t_handler (vl_api_ioam_enable_t * mp)
{
  int rv = 0;
  vl_api_ioam_enable_reply_t *rmp;
  clib_error_t *error;

  /* Ignoring the profile id as currently a single profile
   * is supported */
  error = ip6_ioam_enable (mp->trace_enable, mp->pot_enable,
                           mp->seqno, mp->analyse);
  if (error)
    {
      clib_error_report (error);
      rv = clib_error_get_code (error);
    }

  REPLY_MACRO (VL_API_IOAM_ENABLE_REPLY);
}

static void
vl_api_ioam_disable_t_handler (vl_api_ioam_disable_t * mp)
{
  int rv = 0;
  vl_api_ioam_disable_reply_t *rmp;
  clib_error_t *error;

  error = clear_ioam_rewrite_fn ();
  if (error)
    {
      clib_error_report (error);
      rv = clib_error_get_code (error);
    }

  REPLY_MACRO (VL_API_IOAM_DISABLE_REPLY);
}

static void
vl_api_pg_create_interface_t_handler (vl_api_pg_create_interface_t * mp)
{
  vl_api_pg_create_interface_reply_t *rmp;
  int rv = 0;

  pg_main_t *pg = &pg_main;
  u32 pg_if_id = pg_interface_add_or_get (pg, ntohl (mp->interface_id));
  pg_interface_t *pi = pool_elt_at_index (pg->interfaces, pg_if_id);

  /* *INDENT-OFF* */
  REPLY_MACRO2(VL_API_PG_CREATE_INTERFACE_REPLY,
  ({
    rmp->sw_if_index = ntohl(pi->sw_if_index);
  }));
  /* *INDENT-ON* */
}

static void
vl_api_pg_capture_t_handler (vl_api_pg_capture_t * mp)
{
  vl_api_pg_capture_reply_t *rmp;
  int rv = 0;

  vnet_main_t *vnm = vnet_get_main ();
  vnet_interface_main_t *im = &vnm->interface_main;
  vnet_hw_interface_t *hi = 0;

  u8 *intf_name = format (0, "pg%d", ntohl (mp->interface_id), 0);
  u32 hw_if_index = ~0;
  uword *p = hash_get_mem (im->hw_interface_by_name, intf_name);
  if (p)
    hw_if_index = *p;
  vec_free (intf_name);

  if (hw_if_index != ~0)
    {
      pg_capture_args_t _a, *a = &_a;

      u32 len = ntohl (mp->pcap_name_length);
      u8 *pcap_file_name = vec_new (u8, len);
      clib_memcpy (pcap_file_name, mp->pcap_file_name, len);

      hi = vnet_get_sup_hw_interface (vnm, hw_if_index);
      a->hw_if_index = hw_if_index;
      a->dev_instance = hi->dev_instance;
      a->is_enabled = mp->is_enabled;
      a->pcap_file_name = pcap_file_name;
      a->count = ntohl (mp->count);

      clib_error_t *e = pg_capture (a);
      if (e)
        {
          clib_error_report (e);
          rv = VNET_API_ERROR_CANNOT_CREATE_PCAP_FILE;
        }

      vec_free (pcap_file_name);
    }
  REPLY_MACRO (VL_API_PG_CAPTURE_REPLY);
}

static void
vl_api_pg_enable_disable_t_handler (vl_api_pg_enable_disable_t * mp)
{
  vl_api_pg_enable_disable_reply_t *rmp;
  int rv = 0;

  pg_main_t *pg = &pg_main;
  u32 stream_index = ~0;

  int is_enable = mp->is_enabled != 0;
  u32 len = ntohl (mp->stream_name_length) - 1;

  if (len > 0)
    {
      u8 *stream_name = vec_new (u8, len);
      clib_memcpy (stream_name, mp->stream_name, len);
      uword *p = hash_get_mem (pg->stream_index_by_name, stream_name);
      if (p)
        stream_index = *p;
      vec_free (stream_name);
    }

  pg_enable_disable (stream_index, is_enable);

  REPLY_MACRO (VL_API_PG_ENABLE_DISABLE_REPLY);
}

static void
  vl_api_ip_source_and_port_range_check_add_del_t_handler
  (vl_api_ip_source_and_port_range_check_add_del_t * mp)
{
  vl_api_ip_source_and_port_range_check_add_del_reply_t *rmp;
  int rv = 0;

  u8 is_ipv6 = mp->is_ipv6;
  u8 is_add = mp->is_add;
  u8 mask_length = mp->mask_length;
  ip4_address_t ip4_addr;
  ip6_address_t ip6_addr;
  u16 *low_ports = 0;
  u16 *high_ports = 0;
  u32 vrf_id;
  u16 tmp_low, tmp_high;
  u8 num_ranges;
  int i;

  // Validate port range
  num_ranges = mp->number_of_ranges;
  if (num_ranges > 32)
    {                           // This is size of array in VPE.API
      rv = VNET_API_ERROR_EXCEEDED_NUMBER_OF_RANGES_CAPACITY;
      goto reply;
    }

  vec_reset_length (low_ports);
  vec_reset_length (high_ports);

  for (i = 0; i < num_ranges; i++)
    {
      tmp_low = mp->low_ports[i];
      tmp_high = mp->high_ports[i];
      // If tmp_low <= tmp_high then only need to check tmp_low = 0
      // If tmp_low <= tmp_high then only need to check tmp_high > 65535
      if (tmp_low > tmp_high || tmp_low == 0 || tmp_high > 65535)
        {
          rv = VNET_API_ERROR_INVALID_VALUE;
          goto reply;
        }
      vec_add1 (low_ports, tmp_low);
      vec_add1 (high_ports, tmp_high + 1);
    }

  // Validate mask_length
  if ((is_ipv6 && mask_length > 128) || (!is_ipv6 && mask_length > 32))
    {
      rv = VNET_API_ERROR_ADDRESS_LENGTH_MISMATCH;
      goto reply;
    }

  vrf_id = ntohl (mp->vrf_id);

  if (vrf_id < 1)
    {
      rv = VNET_API_ERROR_INVALID_VALUE;
      goto reply;
    }


  if (is_ipv6)
    {
      clib_memcpy (ip6_addr.as_u8, mp->address, sizeof (ip6_addr.as_u8));
      rv = ip6_source_and_port_range_check_add_del (&ip6_addr,
                                                    mask_length,
                                                    vrf_id,
                                                    low_ports,
                                                    high_ports, is_add);
    }
  else
    {
      clib_memcpy (ip4_addr.data, mp->address, sizeof (ip4_addr));
      rv = ip4_source_and_port_range_check_add_del (&ip4_addr,
                                                    mask_length,
                                                    vrf_id,
                                                    low_ports,
                                                    high_ports, is_add);
    }

reply:
  vec_free (low_ports);
  vec_free (high_ports);
  REPLY_MACRO (VL_API_IP_SOURCE_AND_PORT_RANGE_CHECK_ADD_DEL_REPLY);
}

static void
  vl_api_ip_source_and_port_range_check_interface_add_del_t_handler
  (vl_api_ip_source_and_port_range_check_interface_add_del_t * mp)
{
  vlib_main_t *vm = vlib_get_main ();
  vl_api_ip_source_and_port_range_check_interface_add_del_reply_t *rmp;
  ip4_main_t *im = &ip4_main;
  int rv;
  u32 sw_if_index;
  u32 fib_index[IP_SOURCE_AND_PORT_RANGE_CHECK_N_PROTOCOLS];
  u32 vrf_id[IP_SOURCE_AND_PORT_RANGE_CHECK_N_PROTOCOLS];
  uword *p = 0;
  int i;

  vrf_id[IP_SOURCE_AND_PORT_RANGE_CHECK_PROTOCOL_TCP_OUT] =
    ntohl (mp->tcp_out_vrf_id);
  vrf_id[IP_SOURCE_AND_PORT_RANGE_CHECK_PROTOCOL_UDP_OUT] =
    ntohl (mp->udp_out_vrf_id);
  vrf_id[IP_SOURCE_AND_PORT_RANGE_CHECK_PROTOCOL_TCP_IN] =
    ntohl (mp->tcp_in_vrf_id);
  vrf_id[IP_SOURCE_AND_PORT_RANGE_CHECK_PROTOCOL_UDP_IN] =
    ntohl (mp->udp_in_vrf_id);


  for (i = 0; i < IP_SOURCE_AND_PORT_RANGE_CHECK_N_PROTOCOLS; i++)
    {
      if (vrf_id[i] != 0 && vrf_id[i] != ~0)
        {
          p = hash_get (im->fib_index_by_table_id, vrf_id[i]);

          if (p == 0)
            {
              rv = VNET_API_ERROR_INVALID_VALUE;
              goto reply;
            }

          fib_index[i] = p[0];
        }
      else
        fib_index[i] = ~0;
    }
  sw_if_index = ntohl (mp->sw_if_index);

  VALIDATE_SW_IF_INDEX (mp);

  rv =
    set_ip_source_and_port_range_check (vm, fib_index, sw_if_index,
                                        mp->is_add);

  BAD_SW_IF_INDEX_LABEL;
reply:

  REPLY_MACRO (VL_API_IP_SOURCE_AND_PORT_RANGE_CHECK_INTERFACE_ADD_DEL_REPLY);
}

static void
vl_api_delete_subif_t_handler (vl_api_delete_subif_t * mp)
{
  vl_api_delete_subif_reply_t *rmp;
  int rv;

  rv = vnet_delete_sub_interface (ntohl (mp->sw_if_index));

  REPLY_MACRO (VL_API_DELETE_SUBIF_REPLY);
}

static void
vl_api_punt_t_handler (vl_api_punt_t * mp)
{
  vl_api_punt_reply_t *rmp;
  vlib_main_t *vm = vlib_get_main ();
  int rv = 0;
  clib_error_t *error;

  error = vnet_punt_add_del (vm, mp->ipv, mp->l4_protocol,
                             ntohs (mp->l4_port), mp->is_add);
  if (error)
    {
      rv = -1;
      clib_error_report (error);
    }

  REPLY_MACRO (VL_API_PUNT_REPLY);
}

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);

  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 BOUNCE_HANDLER(nn)                                              \
static void vl_api_##nn##_t_handler (                                   \
    vl_api_##nn##_t *mp)                                                \
{                                                                       \
    vpe_client_registration_t *reg;                                     \
    vpe_api_main_t * vam = &vpe_api_main;                               \
    unix_shared_memory_queue_t * q;                                     \
                                                                        \
    /* One registration only... */                                      \
    pool_foreach(reg, vam->nn##_registrations,                          \
    ({                                                                  \
        q = vl_api_client_index_to_input_queue (reg->client_index);     \
        if (q) {                                                        \
            /*                                                          \
             * If the queue is stuffed, turf the msg and complain       \
             * It's unlikely that the intended recipient is             \
             * alive; avoid deadlock at all costs.                      \
             */                                                         \
            if (q->cursize == q->maxsize) {                             \
                clib_warning ("ERROR: receiver queue full, drop msg");  \
                vl_msg_api_free (mp);                                   \
                return;                                                 \
            }                                                           \
            vl_msg_api_send_shmem (q, (u8 *)&mp);                       \
            return;                                                     \
        }                                                               \
    }));                                                                \
    vl_msg_api_free (mp);                                               \
}

static void setup_message_id_table (api_main_t * am);

/*
 * vpe_api_hookup
 * Add vpe's API message handlers to the table.
 * vlib has alread mapped shared memory and
 * added the client registration handlers.
 * See .../open-repo/vlib/memclnt_vlib.c:memclnt_process()
 */
static clib_error_t *
vpe_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 _

  /*
   * Trace space for classifier mask+match
   */
  am->api_trace_cfg[VL_API_CLASSIFY_ADD_DEL_TABLE].size += 5 * sizeof (u32x4);
  am->api_trace_cfg[VL_API_CLASSIFY_ADD_DEL_SESSION].size
    += 5 * sizeof (u32x4);

  /*
   * Thread-safe API messages
   */
  am->is_mp_safe[VL_API_IP_ADD_DEL_ROUTE] = 1;
  am->is_mp_safe[VL_API_GET_NODE_GRAPH] = 1;

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

  return 0;
}

VLIB_API_INIT_FUNCTION (vpe_api_hookup);

static clib_error_t *
vpe_api_init (vlib_main_t * vm)
{
  vpe_api_main_t *am = &vpe_api_main;

  am->vlib_main = vm;
  am->vnet_main = vnet_get_main ();
  am->interface_events_registration_hash = hash_create (0, sizeof (uword));
  am->to_netconf_server_registration_hash = hash_create (0, sizeof (uword));
  am->from_netconf_server_registration_hash = hash_create (0, sizeof (uword));
  am->to_netconf_client_registration_hash = hash_create (0, sizeof (uword));
  am->from_netconf_client_registration_hash = hash_create (0, sizeof (uword));
  am->oam_events_registration_hash = hash_create (0, sizeof (uword));
  am->bfd_events_registration_hash = hash_create (0, sizeof (uword));

  vl_set_memory_region_name ("/vpe-api");
  vl_enable_disable_memory_api (vm, 1 /* enable it */ );

  return 0;
}

VLIB_INIT_FUNCTION (vpe_api_init);


static clib_error_t *
api_segment_config (vlib_main_t * vm, unformat_input_t * input)
{
  u8 *chroot_path;
  u64 baseva, size, pvt_heap_size;
  int uid, gid, rv;
  const int max_buf_size = 4096;
  char *s, *buf;
  struct passwd _pw, *pw;
  struct group _grp, *grp;
  clib_error_t *e;
  buf = vec_new (char, 128);
  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
    {
      if (unformat (input, "prefix %s", &chroot_path))
        {
          vec_add1 (chroot_path, 0);
          vl_set_memory_root_path ((char *) chroot_path);
        }
      else if (unformat (input, "uid %d", &uid))
        vl_set_memory_uid (uid);
      else if (unformat (input, "gid %d", &gid))
        vl_set_memory_gid (gid);
      else if (unformat (input, "baseva %llx", &baseva))
        vl_set_global_memory_baseva (baseva);
      else if (unformat (input, "global-size %lldM", &size))
        vl_set_global_memory_size (size * (1ULL << 20));
      else if (unformat (input, "global-size %lldG", &size))
        vl_set_global_memory_size (size * (1ULL << 30));
      else if (unformat (input, "global-size %lld", &size))
        vl_set_global_memory_size (size);
      else if (unformat (input, "global-pvt-heap-size %lldM", &pvt_heap_size))
        vl_set_global_pvt_heap_size (pvt_heap_size * (1ULL << 20));
      else if (unformat (input, "global-pvt-heap-size size %lld",
                         &pvt_heap_size))
        vl_set_global_pvt_heap_size (pvt_heap_size);
      else if (unformat (input, "api-pvt-heap-size %lldM", &pvt_heap_size))
        vl_set_api_pvt_heap_size (pvt_heap_size * (1ULL << 20));
      else if (unformat (input, "api-pvt-heap-size size %lld",
                         &pvt_heap_size))
        vl_set_api_pvt_heap_size (pvt_heap_size);
      else if (unformat (input, "api-size %lldM", &size))
        vl_set_api_memory_size (size * (1ULL << 20));
      else if (unformat (input, "api-size %lldG", &size))
        vl_set_api_memory_size (size * (1ULL << 30));
      else if (unformat (input, "api-size %lld", &size))
        vl_set_api_memory_size (size);
      else if (unformat (input, "uid %s", &s))
        {
          /* lookup the username */
          pw = NULL;
          while (((rv =
                   getpwnam_r (s, &_pw, buf, vec_len (buf), &pw)) == ERANGE)
                 && (vec_len (buf) <= max_buf_size))
            {
              vec_resize (buf, vec_len (buf) * 2);
            }
          if (rv < 0)
            {
              e = clib_error_return_code (0, rv,
                                          CLIB_ERROR_ERRNO_VALID |
                                          CLIB_ERROR_FATAL,
                                          "cannot fetch username %s", s);
              vec_free (s);
              vec_free (buf);
              return e;
            }
          if (pw == NULL)
            {
              e =
                clib_error_return_fatal (0, "username %s does not exist", s);
              vec_free (s);
              vec_free (buf);
              return e;
            }
          vec_free (s);
          vl_set_memory_uid (pw->pw_uid);
        }
      else if (unformat (input, "gid %s", &s))
        {
          /* lookup the group name */
          grp = NULL;
          while (((rv =
                   getgrnam_r (s, &_grp, buf, vec_len (buf), &grp)) == ERANGE)
                 && (vec_len (buf) <= max_buf_size))
            {
              vec_resize (buf, vec_len (buf) * 2);
            }
          if (rv != 0)
            {
              e = clib_error_return_code (0, rv,
                                          CLIB_ERROR_ERRNO_VALID |
                                          CLIB_ERROR_FATAL,
                                          "cannot fetch group %s", s);
              vec_free (s);
              vec_free (buf);
              return e;
            }
          if (grp == NULL)
            {
              e = clib_error_return_fatal (0, "group %s does not exist", s);
              vec_free (s);
              vec_free (buf);
              return e;
            }
          vec_free (s);
          vec_free (buf);
          vl_set_memory_gid (grp->gr_gid);
        }
      else
        return clib_error_return (0, "unknown input `%U'",
                                  format_unformat_error, input);
    }
  return 0;
}

VLIB_EARLY_CONFIG_FUNCTION (api_segment_config, "api-segment");

void *
get_unformat_vnet_sw_interface (void)
{
  return (void *) &unformat_vnet_sw_interface;
}

static u8 *
format_arp_event (u8 * s, va_list * args)
{
  vl_api_ip4_arp_event_t *event = va_arg (*args, vl_api_ip4_arp_event_t *);

  s = format (s, "pid %d: ", event->pid);
  if (event->mac_ip)
    s = format (s, "bd mac/ip4 binding events");
  else
    s = format (s, "resolution for %U", format_ip4_address, &event->address);
  return s;
}

static u8 *
format_nd_event (u8 * s, va_list * args)
{
  vl_api_ip6_nd_event_t *event = va_arg (*args, vl_api_ip6_nd_event_t *);

  s = format (s, "pid %d: ", event->pid);
  if (event->mac_ip)
    s = format (s, "bd mac/ip6 binding events");
  else
    s = format (s, "resolution for %U", format_ip6_address, event->address);
  return s;
}

static clib_error_t *
show_ip_arp_nd_events_fn (vlib_main_t * vm,
                          unformat_input_t * input, vlib_cli_command_t * cmd)
{
  vpe_api_main_t *am = &vpe_api_main;
  vl_api_ip4_arp_event_t *arp_event;
  vl_api_ip6_nd_event_t *nd_event;

  if ((pool_elts (am->arp_events) == 0) && (pool_elts (am->nd_events) == 0))
    {
      vlib_cli_output (vm, "No active arp or nd event registrations");
      return 0;
    }

  /* *INDENT-OFF* */
  pool_foreach (arp_event, am->arp_events,
  ({
    vlib_cli_output (vm, "%U", format_arp_event, arp_event);
  }));

  pool_foreach (nd_event, am->nd_events,
  ({
    vlib_cli_output (vm, "%U", format_nd_event, nd_event);
  }));
  /* *INDENT-ON* */

  return 0;
}

/* *INDENT-OFF* */
VLIB_CLI_COMMAND (show_ip_arp_nd_events, static) = {
  .path = "show arp-nd-event registrations",
  .function = show_ip_arp_nd_events_fn,
  .short_help = "Show ip4 arp and ip6 nd event registrations",
};
/* *INDENT-ON* */

#define vl_msg_name_crc_list
#include <vpp/api/vpe_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_memclnt;
  foreach_vl_msg_name_crc_vpe;
#undef _
}


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