text: /*
   *------------------------------------------------------------------
   * interface_api.c - vnet interface api
   *
   * Copyright (c) 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 <vnet/vnet.h>
  #include <vlibmemory/api.h>
  
  #include <vnet/interface.h>
  #include <vnet/interface/rx_queue_funcs.h>
  #include <vnet/api_errno.h>
  #include <vnet/ethernet/ethernet.h>
  #include <vnet/ip/ip.h>
  #include <vnet/fib/fib_table.h>
  #include <vnet/mfib/mfib_table.h>
  #include <vnet/l2/l2_vtr.h>
  #include <vnet/vnet_msg_enum.h>
  #include <vnet/fib/fib_api.h>
  #include <vnet/mfib/mfib_table.h>
  
  #include <vlibapi/api_types.h>
  
  #include <vnet/ip/ip_types_api.h>
  #include <vnet/ethernet/ethernet_types_api.h>
  
  #define vl_typedefs		/* define message structures */
  #include <vnet/vnet_all_api_h.h>
  #undef vl_typedefs
  
  #define vl_endianfun		/* define message structures */
  #include <vnet/vnet_all_api_h.h>
  #undef vl_endianfun
  
  /* instantiate all the print functions we know about */
  #define vl_print(handle, ...) vlib_cli_output (handle, __VA_ARGS__)
  #define vl_printfun
  #include <vnet/vnet_all_api_h.h>
  #undef vl_printfun
  
  #include <vlibapi/api_helper_macros.h>
  vpe_api_main_t vpe_api_main;
  
  #define foreach_vpe_api_msg                                                   \
    _ (SW_INTERFACE_SET_FLAGS, sw_interface_set_flags)                          \
    _ (SW_INTERFACE_SET_PROMISC, sw_interface_set_promisc)                      \
    _ (HW_INTERFACE_SET_MTU, hw_interface_set_mtu)                              \
    _ (SW_INTERFACE_SET_MTU, sw_interface_set_mtu)                              \
    _ (WANT_INTERFACE_EVENTS, want_interface_events)                            \
    _ (SW_INTERFACE_DUMP, sw_interface_dump)                                    \
    _ (SW_INTERFACE_ADD_DEL_ADDRESS, sw_interface_add_del_address)              \
    _ (SW_INTERFACE_SET_RX_MODE, sw_interface_set_rx_mode)                      \
    _ (SW_INTERFACE_RX_PLACEMENT_DUMP, sw_interface_rx_placement_dump)          \
    _ (SW_INTERFACE_SET_RX_PLACEMENT, sw_interface_set_rx_placement)            \
    _ (SW_INTERFACE_SET_TABLE, sw_interface_set_table)                          \
    _ (SW_INTERFACE_GET_TABLE, sw_interface_get_table)                          \
    _ (SW_INTERFACE_SET_UNNUMBERED, sw_interface_set_unnumbered)                \
    _ (SW_INTERFACE_CLEAR_STATS, sw_interface_clear_stats)                      \
    _ (SW_INTERFACE_TAG_ADD_DEL, sw_interface_tag_add_del)                      \
    _ (SW_INTERFACE_ADD_DEL_MAC_ADDRESS, sw_interface_add_del_mac_address)      \
    _ (SW_INTERFACE_SET_MAC_ADDRESS, sw_interface_set_mac_address)              \
    _ (SW_INTERFACE_GET_MAC_ADDRESS, sw_interface_get_mac_address)              \
    _ (CREATE_VLAN_SUBIF, create_vlan_subif)                                    \
    _ (CREATE_SUBIF, create_subif)                                              \
    _ (DELETE_SUBIF, delete_subif)                                              \
    _ (CREATE_LOOPBACK, create_loopback)                                        \
    _ (CREATE_LOOPBACK_INSTANCE, create_loopback_instance)                      \
    _ (DELETE_LOOPBACK, delete_loopback)                                        \
    _ (INTERFACE_NAME_RENUMBER, interface_name_renumber)                        \
    _ (COLLECT_DETAILED_INTERFACE_STATS, collect_detailed_interface_stats)      \
    _ (SW_INTERFACE_SET_IP_DIRECTED_BROADCAST,                                  \
       sw_interface_set_ip_directed_broadcast)                                  \
    _ (SW_INTERFACE_ADDRESS_REPLACE_BEGIN, sw_interface_address_replace_begin)  \
    _ (SW_INTERFACE_ADDRESS_REPLACE_END, sw_interface_address_replace_end)
  
  static void
  vl_api_sw_interface_set_flags_t_handler (vl_api_sw_interface_set_flags_t * mp)
  {
    vl_api_sw_interface_set_flags_reply_t *rmp;
    vnet_main_t *vnm = vnet_get_main ();
    int rv = 0;
    clib_error_t *error;
    u16 flags;
  
    VALIDATE_SW_IF_INDEX (mp);
  
    flags =
      ((ntohl (mp->flags)) & IF_STATUS_API_FLAG_ADMIN_UP) ?
      VNET_SW_INTERFACE_FLAG_ADMIN_UP : 0;
  
    error = vnet_sw_interface_set_flags (vnm, ntohl (mp->sw_if_index), flags);
    if (error)
      {
        rv = -1;
        clib_error_report (error);
      }
  
    BAD_SW_IF_INDEX_LABEL;
    REPLY_MACRO (VL_API_SW_INTERFACE_SET_FLAGS_REPLY);
  }
  
  static void
  vl_api_sw_interface_set_promisc_t_handler (
    vl_api_sw_interface_set_promisc_t *mp)
  {
    vl_api_sw_interface_set_promisc_reply_t *rmp;
    vnet_main_t *vnm = vnet_get_main ();
    ethernet_main_t *em = &ethernet_main;
    int rv = 0;
    ethernet_interface_t *eif;
    vnet_sw_interface_t *swif;
    u32 flags, sw_if_index;
  
    VALIDATE_SW_IF_INDEX (mp);
  
    sw_if_index = ntohl (mp->sw_if_index);
    swif = vnet_get_sw_interface (vnm, sw_if_index);
    eif = ethernet_get_interface (em, swif->hw_if_index);
    if (!eif)
      {
        rv = VNET_API_ERROR_INVALID_VALUE;
        goto done;
      }
  
    flags = mp->promisc_on ? ETHERNET_INTERFACE_FLAG_ACCEPT_ALL : 0;
    rv = ethernet_set_flags (vnm, swif->hw_if_index, flags);
  
  done:
    BAD_SW_IF_INDEX_LABEL;
    REPLY_MACRO (VL_API_SW_INTERFACE_SET_PROMISC_REPLY);
  }
  
  static void
  vl_api_hw_interface_set_mtu_t_handler (vl_api_hw_interface_set_mtu_t * mp)
  {
    vl_api_hw_interface_set_mtu_reply_t *rmp;
    vnet_main_t *vnm = vnet_get_main ();
    u32 sw_if_index = ntohl (mp->sw_if_index);
    u16 mtu = ntohs (mp->mtu);
    ethernet_main_t *em = &ethernet_main;
    int rv = 0;
  
    VALIDATE_SW_IF_INDEX (mp);
  
    vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
    if (si->type != VNET_SW_INTERFACE_TYPE_HARDWARE)
      {
        rv = VNET_API_ERROR_INVALID_VALUE;
        goto bad_sw_if_index;
      }
  
    vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, si->hw_if_index);
    ethernet_interface_t *eif = ethernet_get_interface (em, si->hw_if_index);
  
    if (!eif)
      {
        rv = VNET_API_ERROR_FEATURE_DISABLED;
        goto bad_sw_if_index;
      }
  
    if (mtu < hi->min_supported_packet_bytes)
      {
        rv = VNET_API_ERROR_INVALID_VALUE;
        goto bad_sw_if_index;
      }
  
    if (mtu > hi->max_supported_packet_bytes)
      {
        rv = VNET_API_ERROR_INVALID_VALUE;
        goto bad_sw_if_index;
      }
  
    vnet_hw_interface_set_mtu (vnm, si->hw_if_index, mtu);
  
    BAD_SW_IF_INDEX_LABEL;
    REPLY_MACRO (VL_API_HW_INTERFACE_SET_MTU_REPLY);
  }
  
  static void
  vl_api_sw_interface_set_mtu_t_handler (vl_api_sw_interface_set_mtu_t * mp)
  {
    vl_api_sw_interface_set_mtu_reply_t *rmp;
    vnet_main_t *vnm = vnet_get_main ();
    u32 sw_if_index = ntohl (mp->sw_if_index);
    int rv = 0;
    int i;
    u32 per_protocol_mtu[VNET_N_MTU];
  
    VALIDATE_SW_IF_INDEX (mp);
  
    for (i = 0; i < VNET_N_MTU; i++)
      {
        per_protocol_mtu[i] = ntohl (mp->mtu[i]);
      }
    vnet_sw_interface_set_protocol_mtu (vnm, sw_if_index, per_protocol_mtu);
  
    BAD_SW_IF_INDEX_LABEL;
    REPLY_MACRO (VL_API_SW_INTERFACE_SET_MTU_REPLY);
  }
  
  static void
    vl_api_sw_interface_set_ip_directed_broadcast_t_handler
    (vl_api_sw_interface_set_ip_directed_broadcast_t * mp)
  {
    vl_api_sw_interface_set_ip_directed_broadcast_reply_t *rmp;
    u32 sw_if_index = ntohl (mp->sw_if_index);
    int rv = 0;
  
    VALIDATE_SW_IF_INDEX (mp);
  
    vnet_sw_interface_ip_directed_broadcast (vnet_get_main (),
  					   sw_if_index, mp->enable);
  
    BAD_SW_IF_INDEX_LABEL;
    REPLY_MACRO (VL_API_SW_INTERFACE_SET_IP_DIRECTED_BROADCAST_REPLY);
  }
  
  static void
  send_sw_interface_details (vpe_api_main_t * am,
  			   vl_api_registration_t * rp,
  			   vnet_sw_interface_t * swif,
  			   u8 * interface_name, u32 context)
  {
    vnet_hw_interface_t *hi =
      vnet_get_sup_hw_interface (am->vnet_main, swif->sw_if_index);
    vnet_device_class_t *dev_class =
      vnet_get_device_class (am->vnet_main, hi->dev_class_index);
  
    vl_api_sw_interface_details_t *mp = vl_msg_api_alloc (sizeof (*mp));
    clib_memset (mp, 0, sizeof (*mp));
    mp->_vl_msg_id = ntohs (VL_API_SW_INTERFACE_DETAILS);
    mp->sw_if_index = ntohl (swif->sw_if_index);
    mp->sup_sw_if_index = ntohl (swif->sup_sw_if_index);
  
    mp->flags |= (swif->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ?
      IF_STATUS_API_FLAG_ADMIN_UP : 0;
    mp->flags |= (hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP) ?
      IF_STATUS_API_FLAG_LINK_UP : 0;
    mp->flags = ntohl (mp->flags);
  
    switch (swif->type)
      {
      case VNET_SW_INTERFACE_TYPE_SUB:
        mp->type = IF_API_TYPE_SUB;
        break;
      case VNET_SW_INTERFACE_TYPE_P2P:
        mp->type = IF_API_TYPE_P2P;
        break;
      case VNET_SW_INTERFACE_TYPE_PIPE:
        mp->type = IF_API_TYPE_PIPE;
        break;
      default:
        mp->type = IF_API_TYPE_HARDWARE;
      }
    mp->type = ntohl (mp->type);
  
    mp->link_duplex = ((hi->flags & VNET_HW_INTERFACE_FLAG_DUPLEX_MASK) >>
  		     VNET_HW_INTERFACE_FLAG_DUPLEX_SHIFT);
    mp->link_speed = ntohl (hi->link_speed);
    mp->link_mtu = ntohs (hi->max_packet_bytes);
    mp->mtu[VNET_MTU_L3] = ntohl (swif->mtu[VNET_MTU_L3]);
    mp->mtu[VNET_MTU_IP4] = ntohl (swif->mtu[VNET_MTU_IP4]);
    mp->mtu[VNET_MTU_IP6] = ntohl (swif->mtu[VNET_MTU_IP6]);
    mp->mtu[VNET_MTU_MPLS] = ntohl (swif->mtu[VNET_MTU_MPLS]);
  
    mp->context = context;
  
    strncpy ((char *) mp->interface_name,
  	   (char *) interface_name, ARRAY_LEN (mp->interface_name) - 1);
  
    if (dev_class && dev_class->name)
      strncpy ((char *) mp->interface_dev_type, (char *) dev_class->name,
  	     ARRAY_LEN (mp->interface_dev_type) - 1);
  
    /* Send the L2 address for ethernet physical intfcs */
    if (swif->sup_sw_if_index == swif->sw_if_index
        && hi->hw_class_index == ethernet_hw_interface_class.index)
      {
        ethernet_main_t *em = ethernet_get_main (am->vlib_main);
        ethernet_interface_t *ei;
  
        ei = pool_elt_at_index (em->interfaces, hi->hw_instance);
        ASSERT (sizeof (mp->l2_address) >= sizeof (ei->address.mac));
        mac_address_encode (&ei->address.mac, mp->l2_address);
      }
    else if (swif->sup_sw_if_index != swif->sw_if_index)
      {
        vnet_sub_interface_t *sub = &swif->sub;
        mp->sub_id = ntohl (sub->id);
        mp->sub_number_of_tags =
  	sub->eth.flags.one_tag + sub->eth.flags.two_tags * 2;
        mp->sub_outer_vlan_id = ntohs (sub->eth.outer_vlan_id);
        mp->sub_inner_vlan_id = ntohs (sub->eth.inner_vlan_id);
        mp->sub_if_flags =
  	ntohl (sub->eth.raw_flags & SUB_IF_API_FLAG_MASK_VNET);
      }
  
    /* vlan tag rewrite data */
    u32 vtr_op = L2_VTR_DISABLED;
    u32 vtr_push_dot1q = 0, vtr_tag1 = 0, vtr_tag2 = 0;
  
    if (l2vtr_get (am->vlib_main, am->vnet_main, swif->sw_if_index,
  		 &vtr_op, &vtr_push_dot1q, &vtr_tag1, &vtr_tag2) != 0)
      {
        // error - default to disabled
        mp->vtr_op = ntohl (L2_VTR_DISABLED);
        clib_warning ("cannot get vlan tag rewrite for sw_if_index %d",
  		    swif->sw_if_index);
      }
    else
      {
        mp->vtr_op = ntohl (vtr_op);
        mp->vtr_push_dot1q = ntohl (vtr_push_dot1q);
        mp->vtr_tag1 = ntohl (vtr_tag1);
        mp->vtr_tag2 = ntohl (vtr_tag2);
      }
  
    /* pbb tag rewrite data */
    ethernet_header_t eth_hdr;
    u32 pbb_vtr_op = L2_VTR_DISABLED;
    u16 outer_tag = 0;
    u16 b_vlanid = 0;
    u32 i_sid = 0;
    clib_memset (&eth_hdr, 0, sizeof (eth_hdr));
  
    if (!l2pbb_get (am->vlib_main, am->vnet_main, swif->sw_if_index,
  		  &pbb_vtr_op, &outer_tag, &eth_hdr, &b_vlanid, &i_sid))
      {
        mp->sub_if_flags |= ntohl (SUB_IF_API_FLAG_DOT1AH);
        mac_address_encode ((mac_address_t *) eth_hdr.dst_address, mp->b_dmac);
        mac_address_encode ((mac_address_t *) eth_hdr.src_address, mp->b_smac);
        mp->b_vlanid = b_vlanid;
        mp->i_sid = i_sid;
      }
  
    u8 *tag = vnet_get_sw_interface_tag (vnet_get_main (), swif->sw_if_index);
    if (tag)
      strncpy ((char *) mp->tag, (char *) tag, ARRAY_LEN (mp->tag) - 1);
  
    vl_api_send_msg (rp, (u8 *) mp);
  }
  
  static void
  vl_api_sw_interface_dump_t_handler (vl_api_sw_interface_dump_t * mp)
  {
    vpe_api_main_t *am = &vpe_api_main;
    vnet_sw_interface_t *swif;
    vnet_interface_main_t *im = &am->vnet_main->interface_main;
    vl_api_registration_t *rp;
    u32 sw_if_index;
  
    rp = vl_api_client_index_to_registration (mp->client_index);
  
    if (rp == 0)
      {
        clib_warning ("Client %d AWOL", mp->client_index);
        return;
      }
  
    u8 *filter = 0, *name = 0;
    sw_if_index = ntohl (mp->sw_if_index);
  
    if (!mp->name_filter_valid && sw_if_index != ~0 && sw_if_index != 0)
      {
        /* is it a valid sw_if_index? */
        if (!vnet_sw_if_index_is_api_valid (sw_if_index))
  	return;
  
        swif = vec_elt_at_index (im->sw_interfaces, sw_if_index);
  
        vec_reset_length (name);
        name =
  	format (name, "%U%c", format_vnet_sw_interface_name, am->vnet_main,
  		swif, 0);
        send_sw_interface_details (am, rp, swif, name, mp->context);
        vec_free (name);
        return;
      }
  
    if (mp->name_filter_valid)
      {
        filter = vl_api_from_api_to_new_vec (mp, &mp->name_filter);
        vec_add1 (filter, 0);	/* Ensure it's a C string for strcasecmp() */
      }
  
    char *strcasestr (char *, char *);	/* lnx hdr file botch */
    /* *INDENT-OFF* */
    pool_foreach (swif, im->sw_interfaces)
     {
      if (!vnet_swif_is_api_visible (swif))
          continue;
      vec_reset_length(name);
      name = format (name, "%U%c", format_vnet_sw_interface_name, am->vnet_main,
                     swif, 0);
  
      if (filter && !strcasestr((char *) name, (char *) filter))
  	continue;
  
      send_sw_interface_details (am, rp, swif, name, mp->context);
    }
    /* *INDENT-ON* */
  
    vec_free (name);
    vec_free (filter);
  }
  
  static void
    vl_api_sw_interface_add_del_address_t_handler
    (vl_api_sw_interface_add_del_address_t * mp)
  {
    vlib_main_t *vm = vlib_get_main ();
    vnet_main_t *vnm = vnet_get_main ();
    vl_api_sw_interface_add_del_address_reply_t *rmp;
    int rv = 0;
    u32 is_del;
    clib_error_t *error = 0;
    ip46_address_t address;
  
    VALIDATE_SW_IF_INDEX (mp);
  
    is_del = mp->is_add == 0;
    vnm->api_errno = 0;
  
    if (mp->del_all)
      ip_del_all_interface_addresses (vm, ntohl (mp->sw_if_index));
    else if (ip_address_decode (&mp->prefix.address, &address) == IP46_TYPE_IP6)
      error = ip6_add_del_interface_address (vm, ntohl (mp->sw_if_index),
  					   (void *) &address.ip6,
  					   mp->prefix.len, is_del);
    else
      error = ip4_add_del_interface_address (vm, ntohl (mp->sw_if_index),
  					   (void *) &address.ip4,
  					   mp->prefix.len, is_del);
  
    if (error)
      {
        rv = vnm->api_errno;
        clib_error_report (error);
        goto done;
      }
  
    BAD_SW_IF_INDEX_LABEL;
  
  done:
    REPLY_MACRO (VL_API_SW_INTERFACE_ADD_DEL_ADDRESS_REPLY);
  }
  
  static void
  vl_api_sw_interface_set_table_t_handler (vl_api_sw_interface_set_table_t * mp)
  {
    vl_api_sw_interface_set_table_reply_t *rmp;
    u32 sw_if_index = ntohl (mp->sw_if_index);
    u32 table_id = ntohl (mp->vrf_id);
    int rv = 0;
  
    VALIDATE_SW_IF_INDEX (mp);
  
    if (mp->is_ipv6)
      rv = ip_table_bind (FIB_PROTOCOL_IP6, sw_if_index, table_id, 1);
    else
      rv = ip_table_bind (FIB_PROTOCOL_IP4, sw_if_index, table_id, 1);
  
    BAD_SW_IF_INDEX_LABEL;
  
    REPLY_MACRO (VL_API_SW_INTERFACE_SET_TABLE_REPLY);
  }
  
  int
  ip_table_bind (fib_protocol_t fproto,
  	       u32 sw_if_index, u32 table_id, u8 is_api)
  {
    CLIB_UNUSED (ip_interface_address_t * ia);
    u32 fib_index, mfib_index;
    fib_source_t src;
    mfib_source_t msrc;
  
    if (is_api)
      {
        src = FIB_SOURCE_API;
        msrc = MFIB_SOURCE_API;
      }
    else
      {
        src = FIB_SOURCE_CLI;
        msrc = MFIB_SOURCE_CLI;
      }
  
    /*
     * This if table does not exist = error is what we want in the end.
     */
    fib_index = fib_table_find (fproto, table_id);
    mfib_index = mfib_table_find (fproto, table_id);
  
    if (~0 == fib_index || ~0 == mfib_index)
      {
        return (VNET_API_ERROR_NO_SUCH_FIB);
      }
  
    if (FIB_PROTOCOL_IP6 == fproto)
      {
        /*
         * If the interface already has in IP address, then a change int
         * VRF is not allowed. The IP address applied must first be removed.
         * We do not do that automatically here, since VPP has no knowledge
         * of whether those subnets are valid in the destination VRF.
         */
        /* *INDENT-OFF* */
        foreach_ip_interface_address (&ip6_main.lookup_main,
  				    ia, sw_if_index,
  				    1 /* honor unnumbered */ ,
        ({
          return (VNET_API_ERROR_ADDRESS_FOUND_FOR_INTERFACE);
        }));
        /* *INDENT-ON* */
  
        vec_validate (ip6_main.fib_index_by_sw_if_index, sw_if_index);
        vec_validate (ip6_main.mfib_index_by_sw_if_index, sw_if_index);
  
        /*
         * tell those that are interested that the binding is changing.
         */
        ip6_table_bind_callback_t *cb;
        vec_foreach (cb, ip6_main.table_bind_callbacks)
  	cb->function (&ip6_main, cb->function_opaque,
  		      sw_if_index,
  		      fib_index,
  		      ip6_main.fib_index_by_sw_if_index[sw_if_index]);
  
        if (0 == table_id)
  	{
  	  /* reset back to default */
  	  if (0 != ip6_main.fib_index_by_sw_if_index[sw_if_index])
  	    fib_table_unlock (ip6_main.fib_index_by_sw_if_index[sw_if_index],
  			      FIB_PROTOCOL_IP6, src);
  	  if (0 != ip6_main.mfib_index_by_sw_if_index[sw_if_index])
  	    mfib_table_unlock (ip6_main.mfib_index_by_sw_if_index
  			       [sw_if_index], FIB_PROTOCOL_IP6, msrc);
  
  	}
        else
  	{
  	  /* we need to lock the table now it's inuse */
  	  fib_table_lock (fib_index, FIB_PROTOCOL_IP6, src);
  	  mfib_table_lock (mfib_index, FIB_PROTOCOL_IP6, msrc);
  	}
  
        ip6_main.fib_index_by_sw_if_index[sw_if_index] = fib_index;
        ip6_main.mfib_index_by_sw_if_index[sw_if_index] = mfib_index;
      }
    else
      {
        /*
         * If the interface already has in IP address, then a change int
         * VRF is not allowed. The IP address applied must first be removed.
         * We do not do that automatically here, since VPP has no knowledge
         * of whether those subnets are valid in the destination VRF.
         */
        /* *INDENT-OFF* */
        foreach_ip_interface_address (&ip4_main.lookup_main,
  				    ia, sw_if_index,
  				    1 /* honor unnumbered */ ,
        ({
          return (VNET_API_ERROR_ADDRESS_FOUND_FOR_INTERFACE);
        }));
        /* *INDENT-ON* */
  
        vec_validate (ip4_main.fib_index_by_sw_if_index, sw_if_index);
        vec_validate (ip4_main.mfib_index_by_sw_if_index, sw_if_index);
  
        /*
         * tell those that are interested that the binding is changing.
         */
        ip4_table_bind_callback_t *cb;
        vec_foreach (cb, ip4_main.table_bind_callbacks)
  	cb->function (&ip4_main, cb->function_opaque,
  		      sw_if_index,
  		      fib_index,
  		      ip4_main.fib_index_by_sw_if_index[sw_if_index]);
  
        if (0 == table_id)
  	{
  	  /* reset back to default */
  	  if (0 != ip4_main.fib_index_by_sw_if_index[sw_if_index])
  	    fib_table_unlock (ip4_main.fib_index_by_sw_if_index[sw_if_index],
  			      FIB_PROTOCOL_IP4, src);
  	  if (0 != ip4_main.mfib_index_by_sw_if_index[sw_if_index])
  	    mfib_table_unlock (ip4_main.mfib_index_by_sw_if_index
  			       [sw_if_index], FIB_PROTOCOL_IP4, msrc);
  
  	}
        else
  	{
  	  /* we need to lock the table now it's inuse */
  	  fib_index = fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP4,
  							 table_id, src);
  
  	  mfib_index = mfib_table_find_or_create_and_lock (FIB_PROTOCOL_IP4,
  							   table_id, msrc);
  	}
  
        ip4_main.fib_index_by_sw_if_index[sw_if_index] = fib_index;
        ip4_main.mfib_index_by_sw_if_index[sw_if_index] = mfib_index;
      }
  
    return (0);
  }
  
  static void
  send_sw_interface_get_table_reply (vl_api_registration_t * reg,
  				   u32 context, int retval, u32 vrf_id)
  {
    vl_api_sw_interface_get_table_reply_t *mp;
  
    mp = vl_msg_api_alloc (sizeof (*mp));
    clib_memset (mp, 0, sizeof (*mp));
    mp->_vl_msg_id = ntohs (VL_API_SW_INTERFACE_GET_TABLE_REPLY);
    mp->context = context;
    mp->retval = htonl (retval);
    mp->vrf_id = htonl (vrf_id);
  
    vl_api_send_msg (reg, (u8 *) mp);
  }
  
  static void
  vl_api_sw_interface_get_table_t_handler (vl_api_sw_interface_get_table_t * mp)
  {
    vl_api_registration_t *reg;
    fib_table_t *fib_table = 0;
    u32 sw_if_index = ~0;
    u32 fib_index = ~0;
    u32 table_id = ~0;
    fib_protocol_t fib_proto = FIB_PROTOCOL_IP4;
    int rv = 0;
  
    reg = vl_api_client_index_to_registration (mp->client_index);
    if (!reg)
      return;
  
    VALIDATE_SW_IF_INDEX (mp);
  
    sw_if_index = ntohl (mp->sw_if_index);
  
    if (mp->is_ipv6)
      fib_proto = FIB_PROTOCOL_IP6;
  
    fib_index = fib_table_get_index_for_sw_if_index (fib_proto, sw_if_index);
    if (fib_index != ~0)
      {
        fib_table = fib_table_get (fib_index, fib_proto);
        table_id = fib_table->ft_table_id;
      }
  
    BAD_SW_IF_INDEX_LABEL;
  
    send_sw_interface_get_table_reply (reg, mp->context, rv, table_id);
  }
  
  static void vl_api_sw_interface_set_unnumbered_t_handler
    (vl_api_sw_interface_set_unnumbered_t * mp)
  {
    vl_api_sw_interface_set_unnumbered_reply_t *rmp;
    int rv = 0;
    vnet_main_t *vnm = vnet_get_main ();
    u32 sw_if_index = ntohl (mp->sw_if_index);
    u32 unnumbered_sw_if_index = ntohl (mp->unnumbered_sw_if_index);
  
    /*
     * The API message field names are backwards from
     * the underlying data structure names.
     * It's not worth changing them now.
     */
    if (!vnet_sw_interface_is_api_valid (vnm, unnumbered_sw_if_index))
      {
        rv = VNET_API_ERROR_INVALID_SW_IF_INDEX;
        goto done;
      }
  
    /* Only check the "use loop0" field when setting the binding */
    if (mp->is_add && !vnet_sw_interface_is_api_valid (vnm, sw_if_index))
      {
        rv = VNET_API_ERROR_INVALID_SW_IF_INDEX_2;
        goto done;
      }
  
    vnet_sw_interface_update_unnumbered (unnumbered_sw_if_index,
  				       sw_if_index, mp->is_add);
  done:
    REPLY_MACRO (VL_API_SW_INTERFACE_SET_UNNUMBERED_REPLY);
  }
  
  static void
  vl_api_sw_interface_clear_stats_t_handler (vl_api_sw_interface_clear_stats_t *
  					   mp)
  {
    vl_api_sw_interface_clear_stats_reply_t *rmp;
  
    vnet_main_t *vnm = vnet_get_main ();
    vnet_interface_main_t *im = &vnm->interface_main;
    vlib_simple_counter_main_t *sm;
    vlib_combined_counter_main_t *cm;
    int j, n_counters;
    int rv = 0;
  
    if (mp->sw_if_index != ~0)
      VALIDATE_SW_IF_INDEX (mp);
  
    n_counters = vec_len (im->combined_sw_if_counters);
  
    for (j = 0; j < n_counters; j++)
      {
        im = &vnm->interface_main;
        cm = im->combined_sw_if_counters + j;
        if (mp->sw_if_index == (u32) ~ 0)
  	vlib_clear_combined_counters (cm);
        else
  	vlib_zero_combined_counter (cm, ntohl (mp->sw_if_index));
      }
  
    n_counters = vec_len (im->sw_if_counters);
  
    for (j = 0; j < n_counters; j++)
      {
        im = &vnm->interface_main;
        sm = im->sw_if_counters + j;
        if (mp->sw_if_index == (u32) ~ 0)
  	vlib_clear_simple_counters (sm);
        else
  	vlib_zero_simple_counter (sm, ntohl (mp->sw_if_index));
      }
  
    BAD_SW_IF_INDEX_LABEL;
  
    REPLY_MACRO (VL_API_SW_INTERFACE_CLEAR_STATS_REPLY);
  }
  
  /*
   * Events used for sw_interface_events
   */
  enum api_events
  {
    API_LINK_STATE_UP_EVENT = 1 << 1,
    API_LINK_STATE_DOWN_EVENT = 1 << 2,
    API_ADMIN_UP_EVENT = 1 << 3,
    API_ADMIN_DOWN_EVENT = 1 << 4,
    API_SW_INTERFACE_ADD_EVENT = 1 << 5,
    API_SW_INTERFACE_DEL_EVENT = 1 << 6,
  };
  
  static void
  send_sw_interface_event (vpe_api_main_t * am,
  			 vpe_client_registration_t * reg,
  			 vl_api_registration_t * vl_reg,
  			 u32 sw_if_index, enum api_events events)
  {
    vl_api_sw_interface_event_t *mp;
  
    mp = vl_msg_api_alloc (sizeof (*mp));
    clib_memset (mp, 0, sizeof (*mp));
    mp->_vl_msg_id = ntohs (VL_API_SW_INTERFACE_EVENT);
    mp->sw_if_index = ntohl (sw_if_index);
    mp->client_index = reg->client_index;
    mp->pid = reg->client_pid;
    mp->flags = 0;
    mp->flags |= (events & API_ADMIN_UP_EVENT) ?
      IF_STATUS_API_FLAG_ADMIN_UP : 0;
    mp->flags |= (events & API_LINK_STATE_UP_EVENT) ?
      IF_STATUS_API_FLAG_LINK_UP : 0;
    mp->flags = ntohl (mp->flags);
    mp->deleted = events & API_SW_INTERFACE_DEL_EVENT ? true : false;
    vl_api_send_msg (vl_reg, (u8 *) mp);
  }
  
  static uword
  link_state_process (vlib_main_t * vm,
  		    vlib_node_runtime_t * rt, vlib_frame_t * f)
  {
    vpe_api_main_t *vam = &vpe_api_main;
    uword *event_by_sw_if_index = 0;
    vpe_client_registration_t *reg;
    int i;
    vl_api_registration_t *vl_reg;
    uword event_type;
    uword *event_data = 0;
    u32 sw_if_index;
  
    vam->link_state_process_up = 1;
  
    while (1)
      {
        vlib_process_wait_for_event (vm);
  
        /* Batch up events */
        while ((event_type = vlib_process_get_events (vm, &event_data)) != ~0)
  	{
  	  for (i = 0; i < vec_len (event_data); i++)
  	    {
  	      sw_if_index = event_data[i];
  	      vec_validate_init_empty (event_by_sw_if_index, sw_if_index, 0);
  	      event_by_sw_if_index[sw_if_index] |= event_type;
  	    }
  	  vec_reset_length (event_data);
  	}
  
        for (i = 0; i < vec_len (event_by_sw_if_index); i++)
  	{
  	  if (event_by_sw_if_index[i] == 0)
  	    continue;
  
            /* *INDENT-OFF* */
            pool_foreach (reg, vam->interface_events_registrations)
             {
              vl_reg = vl_api_client_index_to_registration (reg->client_index);
              if (vl_reg)
  	      send_sw_interface_event (vam, reg, vl_reg, i, event_by_sw_if_index[i]);
            }
            /* *INDENT-ON* */
  	}
        vec_reset_length (event_by_sw_if_index);
      }
  
    return 0;
  }
  
  static clib_error_t *link_up_down_function (vnet_main_t * vm, u32 hw_if_index,
  					    u32 flags);
  static clib_error_t *admin_up_down_function (vnet_main_t * vm,
  					     u32 hw_if_index, u32 flags);
  static clib_error_t *sw_interface_add_del_function (vnet_main_t * vm,
  						    u32 sw_if_index,
  						    u32 flags);
  
  /* *INDENT-OFF* */
  VLIB_REGISTER_NODE (link_state_process_node,static) = {
    .function = link_state_process,
    .type = VLIB_NODE_TYPE_PROCESS,
    .name = "vpe-link-state-process",
  };
  /* *INDENT-ON* */
  
  VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (admin_up_down_function);
  VNET_HW_INTERFACE_LINK_UP_DOWN_FUNCTION (link_up_down_function);
  VNET_SW_INTERFACE_ADD_DEL_FUNCTION (sw_interface_add_del_function);
  
  static clib_error_t *
  link_up_down_function (vnet_main_t * vm, u32 hw_if_index, u32 flags)
  {
    vpe_api_main_t *vam = &vpe_api_main;
    vnet_hw_interface_t *hi = vnet_get_hw_interface (vm, hw_if_index);
  
    if (vam->link_state_process_up)
      {
        enum api_events event = ((flags & VNET_HW_INTERFACE_FLAG_LINK_UP) ?
  			       API_LINK_STATE_UP_EVENT :
  			       API_LINK_STATE_DOWN_EVENT);
        vlib_process_signal_event (vam->vlib_main,
  				 link_state_process_node.index, event,
  				 hi->sw_if_index);
      }
    return 0;
  }
  
  static clib_error_t *
  admin_up_down_function (vnet_main_t * vm, u32 sw_if_index, u32 flags)
  {
    vpe_api_main_t *vam = &vpe_api_main;
  
    /*
     * Note: it's perfectly fair to set a subif admin up / admin down.
     * Note the subtle distinction between this routine and the previous
     * routine.
     */
    if (vam->link_state_process_up)
      {
        enum api_events event = ((flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ?
  			       API_ADMIN_UP_EVENT : API_ADMIN_DOWN_EVENT);
        vlib_process_signal_event (vam->vlib_main,
  				 link_state_process_node.index, event,
  				 sw_if_index);
      }
    return 0;
  }
  
  static clib_error_t *
  sw_interface_add_del_function (vnet_main_t * vm, u32 sw_if_index, u32 flags)
  {
    vpe_api_main_t *vam = &vpe_api_main;
  
    if (vam->link_state_process_up)
      {
        enum api_events event =
  	flags ? API_SW_INTERFACE_ADD_EVENT : API_SW_INTERFACE_DEL_EVENT;
        vlib_process_signal_event (vam->vlib_main,
  				 link_state_process_node.index, event,
  				 sw_if_index);
      }
    return 0;
  }
  
  static void vl_api_sw_interface_tag_add_del_t_handler
    (vl_api_sw_interface_tag_add_del_t * mp)
  {
    vnet_main_t *vnm = vnet_get_main ();
    vl_api_sw_interface_tag_add_del_reply_t *rmp;
    int rv = 0;
    u8 *tag;
    u32 sw_if_index = ntohl (mp->sw_if_index);
  
    VALIDATE_SW_IF_INDEX (mp);
  
    if (mp->is_add)
      {
        if (mp->tag[0] == 0)
  	{
  	  rv = VNET_API_ERROR_INVALID_VALUE;
  	  goto out;
  	}
  
        mp->tag[ARRAY_LEN (mp->tag) - 1] = 0;
        tag = format (0, "%s%c", mp->tag, 0);
        vnet_set_sw_interface_tag (vnm, tag, sw_if_index);
      }
    else
      vnet_clear_sw_interface_tag (vnm, sw_if_index);
  
    BAD_SW_IF_INDEX_LABEL;
  out:
    REPLY_MACRO (VL_API_SW_INTERFACE_TAG_ADD_DEL_REPLY);
  }
  
  static void vl_api_sw_interface_add_del_mac_address_t_handler
    (vl_api_sw_interface_add_del_mac_address_t * mp)
  {
    vl_api_sw_interface_add_del_mac_address_reply_t *rmp;
    vnet_main_t *vnm = vnet_get_main ();
    u32 sw_if_index = ntohl (mp->sw_if_index);
    vnet_hw_interface_t *hi;
    clib_error_t *error;
    int rv = 0;
  
    VALIDATE_SW_IF_INDEX (mp);
  
    /* for subifs, the MAC should be changed on the actual hw if */
    hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
    error = vnet_hw_interface_add_del_mac_address (vnm, hi->hw_if_index,
  						 mp->addr, mp->is_add);
    if (error)
      {
        rv = VNET_API_ERROR_UNIMPLEMENTED;
        clib_error_report (error);
        goto out;
      }
  
    BAD_SW_IF_INDEX_LABEL;
  out:
    REPLY_MACRO (VL_API_SW_INTERFACE_ADD_DEL_MAC_ADDRESS_REPLY);
  }
  
  static void vl_api_sw_interface_set_mac_address_t_handler
    (vl_api_sw_interface_set_mac_address_t * mp)
  {
    vl_api_sw_interface_set_mac_address_reply_t *rmp;
    vnet_main_t *vnm = vnet_get_main ();
    u32 sw_if_index = ntohl (mp->sw_if_index);
    vnet_sw_interface_t *si;
    clib_error_t *error;
    int rv = 0;
    mac_address_t mac;
  
    VALIDATE_SW_IF_INDEX (mp);
  
    si = vnet_get_sw_interface (vnm, sw_if_index);
    mac_address_decode (mp->mac_address, &mac);
    error =
      vnet_hw_interface_change_mac_address (vnm, si->hw_if_index, (u8 *) & mac);
    if (error)
      {
        rv = VNET_API_ERROR_UNIMPLEMENTED;
        clib_error_report (error);
        goto out;
      }
  
    BAD_SW_IF_INDEX_LABEL;
  out:
    REPLY_MACRO (VL_API_SW_INTERFACE_SET_MAC_ADDRESS_REPLY);
  }
  
  static void vl_api_sw_interface_get_mac_address_t_handler
    (vl_api_sw_interface_get_mac_address_t * mp)
  {
    vl_api_sw_interface_get_mac_address_reply_t *rmp;
    vl_api_registration_t *reg;
    vnet_main_t *vnm = vnet_get_main ();
    u32 sw_if_index = ntohl (mp->sw_if_index);
    vnet_sw_interface_t *si;
    ethernet_interface_t *eth_if = 0;
    int rv = 0;
  
    VALIDATE_SW_IF_INDEX (mp);
  
    si = vnet_get_sup_sw_interface (vnm, sw_if_index);
    if (si->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
      eth_if = ethernet_get_interface (&ethernet_main, si->hw_if_index);
  
    BAD_SW_IF_INDEX_LABEL;
  
    reg = vl_api_client_index_to_registration (mp->client_index);
    if (!reg)
      return;
    rmp = vl_msg_api_alloc (sizeof (*rmp));
    rmp->_vl_msg_id = htons (VL_API_SW_INTERFACE_GET_MAC_ADDRESS_REPLY);
    rmp->context = mp->context;
    rmp->retval = htonl (rv);
    if (!rv && eth_if)
      mac_address_encode (&eth_if->address.mac, rmp->mac_address);
    vl_api_send_msg (reg, (u8 *) rmp);
  }
  
  static void vl_api_sw_interface_set_rx_mode_t_handler
    (vl_api_sw_interface_set_rx_mode_t * mp)
  {
    vl_api_sw_interface_set_rx_mode_reply_t *rmp;
    vnet_main_t *vnm = vnet_get_main ();
    u32 sw_if_index = ntohl (mp->sw_if_index);
    vnet_sw_interface_t *si;
    clib_error_t *error;
    int rv = 0;
    vnet_hw_if_rx_mode rx_mode;
  
    VALIDATE_SW_IF_INDEX (mp);
  
    si = vnet_get_sw_interface (vnm, sw_if_index);
    if (si->type != VNET_SW_INTERFACE_TYPE_HARDWARE)
      {
        rv = VNET_API_ERROR_INVALID_VALUE;
        goto bad_sw_if_index;
      }
  
    rx_mode = (vnet_hw_if_rx_mode) ntohl (mp->mode);
    error = set_hw_interface_change_rx_mode (vnm, si->hw_if_index,
  					   mp->queue_id_valid,
  					   ntohl (mp->queue_id),
  					   (vnet_hw_if_rx_mode) rx_mode);
  
    if (error)
      {
        rv = VNET_API_ERROR_UNIMPLEMENTED;
        clib_error_report (error);
        goto out;
      }
  
    BAD_SW_IF_INDEX_LABEL;
  out:
    REPLY_MACRO (VL_API_SW_INTERFACE_SET_RX_MODE_REPLY);
  }
  
  static void
  send_interface_rx_placement_details (vpe_api_main_t * am,
  				     vl_api_registration_t * rp,
  				     u32 sw_if_index, u32 worker_id,
  				     u32 queue_id, u8 mode, u32 context)
  {
    vl_api_sw_interface_rx_placement_details_t *mp;
    mp = vl_msg_api_alloc (sizeof (*mp));
    clib_memset (mp, 0, sizeof (*mp));
  
    mp->_vl_msg_id = htons (VL_API_SW_INTERFACE_RX_PLACEMENT_DETAILS);
    mp->sw_if_index = htonl (sw_if_index);
    mp->queue_id = htonl (queue_id);
    mp->worker_id = htonl (worker_id);
    mp->mode = htonl (mode);
    mp->context = context;
  
    vl_api_send_msg (rp, (u8 *) mp);
  }
  
  static void vl_api_sw_interface_rx_placement_dump_t_handler
    (vl_api_sw_interface_rx_placement_dump_t * mp)
  {
    vnet_main_t *vnm = vnet_get_main ();
    vpe_api_main_t *am = &vpe_api_main;
    u32 sw_if_index = ntohl (mp->sw_if_index);
    vl_api_registration_t *reg;
  
    reg = vl_api_client_index_to_registration (mp->client_index);
    if (!reg)
      return;
  
    if (sw_if_index == ~0)
      {
        vnet_hw_if_rx_queue_t **all_queues = 0;
        vnet_hw_if_rx_queue_t **qptr;
        vnet_hw_if_rx_queue_t *q;
        vec_foreach (q, vnm->interface_main.hw_if_rx_queues)
  	vec_add1 (all_queues, q);
        vec_sort_with_function (all_queues, vnet_hw_if_rxq_cmp_cli_api);
  
        vec_foreach (qptr, all_queues)
  	{
  	  u32 current_thread = qptr[0]->thread_index;
  	  u32 hw_if_index = qptr[0]->hw_if_index;
  	  vnet_hw_interface_t *hw_if =
  	    vnet_get_hw_interface (vnm, hw_if_index);
  	  send_interface_rx_placement_details (
  	    am, reg, hw_if->sw_if_index, current_thread, qptr[0]->queue_id,
  	    qptr[0]->mode, mp->context);
  	}
        vec_free (all_queues);
      }
    else
      {
        int i;
        vnet_sw_interface_t *si;
  
        if (!vnet_sw_if_index_is_api_valid (sw_if_index))
  	{
  	  clib_warning ("sw_if_index %u does not exist", sw_if_index);
  	  goto bad_sw_if_index;
  	}
  
        si = vnet_get_sw_interface (vnm, sw_if_index);
        if (si->type != VNET_SW_INTERFACE_TYPE_HARDWARE)
  	{
  	  clib_warning ("interface type is not HARDWARE! P2P, PIPE and SUB"
  			" interfaces are not supported");
  	  goto bad_sw_if_index;
  	}
  
        vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, si->hw_if_index);
  
        for (i = 0; i < vec_len (hw->rx_queue_indices); i++)
  	{
  	  vnet_hw_if_rx_queue_t *rxq =
  	    vnet_hw_if_get_rx_queue (vnm, hw->rx_queue_indices[i]);
  	  send_interface_rx_placement_details (
  	    am, reg, hw->sw_if_index, rxq->thread_index, rxq->queue_id,
  	    rxq->mode, mp->context);
  	}
      }
  
    BAD_SW_IF_INDEX_LABEL;
  }
  
  static void vl_api_sw_interface_set_rx_placement_t_handler
    (vl_api_sw_interface_set_rx_placement_t * mp)
  {
    vl_api_sw_interface_set_rx_placement_reply_t *rmp;
    vnet_main_t *vnm = vnet_get_main ();
    u32 sw_if_index = ntohl (mp->sw_if_index);
    vnet_sw_interface_t *si;
    clib_error_t *error = 0;
    int rv = 0;
  
    VALIDATE_SW_IF_INDEX (mp);
  
    si = vnet_get_sw_interface (vnm, sw_if_index);
    if (si->type != VNET_SW_INTERFACE_TYPE_HARDWARE)
      {
        rv = VNET_API_ERROR_INVALID_VALUE;
        goto bad_sw_if_index;
      }
  
    error = set_hw_interface_rx_placement (si->hw_if_index,
  					 ntohl (mp->queue_id),
  					 ntohl (mp->worker_id), mp->is_main);
    if (error)
      {
        rv = VNET_API_ERROR_UNIMPLEMENTED;
        clib_error_report (error);
        goto out;
      }
  
    BAD_SW_IF_INDEX_LABEL;
  out:
    REPLY_MACRO (VL_API_SW_INTERFACE_SET_RX_PLACEMENT_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;
    vl_api_registration_t *reg;
    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;
      }
  
    clib_memset (&template, 0, sizeof (template));
    template.type = VNET_SW_INTERFACE_TYPE_SUB;
    template.flood_class = VNET_FLOOD_CLASS_NORMAL;
    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:
    reg = vl_api_client_index_to_registration (mp->client_index);
    if (!reg)
      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_api_send_msg (reg, (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 sub_sw_if_index = ~0;
    vnet_hw_interface_t *hi;
    int rv = 0;
  
    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;
    else
      rv = vnet_create_sub_interface (ntohl (mp->sw_if_index),
  				    ntohl (mp->sub_id),
  				    ntohl (mp->sub_if_flags),
  				    ntohs (mp->inner_vlan_id),
  				    ntohs (mp->outer_vlan_id),
  				    &sub_sw_if_index);
  
    BAD_SW_IF_INDEX_LABEL;
  
    /* *INDENT-OFF* */
    REPLY_MACRO2(VL_API_CREATE_SUBIF_REPLY,
    ({
      rmp->sw_if_index = ntohl(sub_sw_if_index);
    }));
    /* *INDENT-ON* */
  }
  
  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_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 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;
    mac_address_t mac;
  
    mac_address_decode (mp->mac_address, &mac);
    rv = vnet_create_loopback_interface (&sw_if_index, (u8 *) & mac, 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;
    mac_address_t mac;
  
    mac_address_decode (mp->mac_address, &mac);
    rv = vnet_create_loopback_interface (&sw_if_index, (u8 *) & mac,
  				       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_collect_detailed_interface_stats_t_handler
    (vl_api_collect_detailed_interface_stats_t * mp)
  {
    vl_api_collect_detailed_interface_stats_reply_t *rmp;
    int rv = 0;
  
    rv =
      vnet_sw_interface_stats_collect_enable_disable (ntohl (mp->sw_if_index),
  						    mp->enable_disable);
  
    REPLY_MACRO (VL_API_COLLECT_DETAILED_INTERFACE_STATS_REPLY);
  }
  
  static void
    vl_api_sw_interface_address_replace_begin_t_handler
    (vl_api_sw_interface_address_replace_begin_t * mp)
  {
    vl_api_sw_interface_address_replace_begin_reply_t *rmp;
    int rv = 0;
  
    ip_interface_address_mark ();
  
    REPLY_MACRO (VL_API_SW_INTERFACE_ADDRESS_REPLACE_BEGIN_REPLY);
  }
  
  static void
    vl_api_sw_interface_address_replace_end_t_handler
    (vl_api_sw_interface_address_replace_end_t * mp)
  {
    vl_api_sw_interface_address_replace_end_reply_t *rmp;
    int rv = 0;
  
    ip_interface_address_sweep ();
  
    REPLY_MACRO (VL_API_SW_INTERFACE_ADDRESS_REPLACE_END_REPLY);
  }
  
  /*
   * vpe_api_hookup
   * Add vpe's API message handlers to the table.
   * vlib has already mapped shared memory and
   * added the client registration handlers.
   * See .../vlib-api/vlibmemory/memclnt_vlib.c:memclnt_process()
   */
  #define vl_msg_name_crc_list
  #include <vnet/interface.api.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_interface;
  #undef _
  }
  
  pub_sub_handler (interface_events, INTERFACE_EVENTS);
  
  static clib_error_t *
  interface_api_hookup (vlib_main_t * vm)
  {
    api_main_t *am = vlibapi_get_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 _
  
    /* Mark these APIs as mp safe */
    am->is_mp_safe[VL_API_SW_INTERFACE_DUMP] = 1;
    am->is_mp_safe[VL_API_SW_INTERFACE_DETAILS] = 1;
    am->is_mp_safe[VL_API_SW_INTERFACE_TAG_ADD_DEL] = 1;
  
    /* Do not replay VL_API_SW_INTERFACE_DUMP messages */
    am->api_trace_cfg[VL_API_SW_INTERFACE_DUMP].replay_enable = 0;
  
    /*
     * Set up the (msg_name, crc, message-id) table
     */
    setup_message_id_table (am);
  
    return 0;
  }
  
  VLIB_API_INIT_FUNCTION (interface_api_hookup);
  
  /*
   * fd.io coding-style-patch-verification: ON
   *
   * Local Variables:
   * eval: (c-set-style "gnu")
   * End:
   */
  