text: /*
   *------------------------------------------------------------------
   * ip_api.c - vnet ip 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/api_errno.h>
  #include <vnet/ethernet/ethernet.h>
  #include <vnet/ip/ip.h>
  #include <vnet/ip/ip6_neighbor.h>
  #include <vnet/fib/fib_table.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>
  #include <vnet/ethernet/arp_packet.h>
  
  #include <vnet/vnet_msg_enum.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>
  
  #define foreach_ip_api_msg                                              \
  _(IP_FIB_DUMP, ip_fib_dump)                                             \
  _(IP_FIB_DETAILS, ip_fib_details)                                       \
  _(IP6_FIB_DUMP, ip6_fib_dump)                                           \
  _(IP6_FIB_DETAILS, ip6_fib_details)                                     \
  _(IP_NEIGHBOR_DUMP, ip_neighbor_dump)                                   \
  _(IP_NEIGHBOR_DETAILS, ip_neighbor_details)                             \
  _(IP_ADDRESS_DUMP, ip_address_dump)                                     \
  _(IP_DUMP, ip_dump)                                                     \
  _(IP_NEIGHBOR_ADD_DEL, ip_neighbor_add_del)                             \
  _(IP_ADD_DEL_ROUTE, ip_add_del_route)                                   \
  _(SET_IP_FLOW_HASH,set_ip_flow_hash)                                    \
  _(SW_INTERFACE_IP6ND_RA_CONFIG, sw_interface_ip6nd_ra_config)           \
  _(SW_INTERFACE_IP6ND_RA_PREFIX, sw_interface_ip6nd_ra_prefix)           \
  _(SW_INTERFACE_IP6_ENABLE_DISABLE, sw_interface_ip6_enable_disable )    \
  _(SW_INTERFACE_IP6_SET_LINK_LOCAL_ADDRESS, 				\
    sw_interface_ip6_set_link_local_address)
  
  extern void stats_dslock_with_hint (int hint, int tag);
  extern void stats_dsunlock (void);
  
  static void
  send_ip_neighbor_details (u8 is_ipv6,
  			  u8 is_static,
  			  u8 * mac_address,
  			  u8 * ip_address,
  			  unix_shared_memory_queue_t * q, u32 context)
  {
    vl_api_ip_neighbor_details_t *mp;
  
    mp = vl_msg_api_alloc (sizeof (*mp));
    memset (mp, 0, sizeof (*mp));
    mp->_vl_msg_id = ntohs (VL_API_IP_NEIGHBOR_DETAILS);
    mp->context = context;
    mp->is_ipv6 = is_ipv6;
    mp->is_static = is_static;
    memcpy (mp->mac_address, mac_address, 6);
    memcpy (mp->ip_address, ip_address, (is_ipv6) ? 16 : 4);
  
    vl_msg_api_send_shmem (q, (u8 *) & mp);
  }
  
  static void
  vl_api_ip_neighbor_details_t_handler (vl_api_ip_neighbor_details_t * mp)
  {
    clib_warning ("BUG");
  }
  
  static void
  vl_api_ip_neighbor_dump_t_handler (vl_api_ip_neighbor_dump_t * mp)
  {
    unix_shared_memory_queue_t *q;
  
    q = vl_api_client_index_to_input_queue (mp->client_index);
    if (q == 0)
      return;
  
    u32 sw_if_index = ntohl (mp->sw_if_index);
  
    if (mp->is_ipv6)
      {
        ip6_neighbor_t *n, *ns;
  
        ns = ip6_neighbors_entries (sw_if_index);
        /* *INDENT-OFF* */
        vec_foreach (n, ns)
        {
          send_ip_neighbor_details
            (mp->is_ipv6, ((n->flags & IP6_NEIGHBOR_FLAG_STATIC) ? 1 : 0),
             (u8 *) n->link_layer_address,
             (u8 *) & (n->key.ip6_address.as_u8),
             q, mp->context);
        }
        /* *INDENT-ON* */
        vec_free (ns);
      }
    else
      {
        ethernet_arp_ip4_entry_t *n, *ns;
  
        ns = ip4_neighbor_entries (sw_if_index);
        /* *INDENT-OFF* */
        vec_foreach (n, ns)
        {
          send_ip_neighbor_details (mp->is_ipv6,
            ((n->flags & ETHERNET_ARP_IP4_ENTRY_FLAG_STATIC) ? 1 : 0),
            (u8*) n->ethernet_address,
            (u8*) & (n->ip4_address.as_u8),
            q, mp->context);
        }
        /* *INDENT-ON* */
        vec_free (ns);
      }
  }
  
  
  void
  copy_fib_next_hop (fib_route_path_encode_t * api_rpath, void *fp_arg)
  {
    int is_ip4;
    vl_api_fib_path_t *fp = (vl_api_fib_path_t *) fp_arg;
  
    if (api_rpath->rpath.frp_proto == FIB_PROTOCOL_IP4)
      fp->afi = IP46_TYPE_IP4;
    else if (api_rpath->rpath.frp_proto == FIB_PROTOCOL_IP6)
      fp->afi = IP46_TYPE_IP6;
    else
      {
        is_ip4 = ip46_address_is_ip4 (&api_rpath->rpath.frp_addr);
        if (is_ip4)
  	fp->afi = IP46_TYPE_IP4;
        else
  	fp->afi = IP46_TYPE_IP6;
      }
    if (fp->afi == IP46_TYPE_IP4)
      memcpy (fp->next_hop, &api_rpath->rpath.frp_addr.ip4,
  	    sizeof (api_rpath->rpath.frp_addr.ip4));
    else
      memcpy (fp->next_hop, &api_rpath->rpath.frp_addr.ip6,
  	    sizeof (api_rpath->rpath.frp_addr.ip6));
  }
  
  static void
  vl_api_ip_fib_details_t_handler (vl_api_ip_fib_details_t * mp)
  {
    clib_warning ("BUG");
  }
  
  static void
  vl_api_ip_fib_details_t_endian (vl_api_ip_fib_details_t * mp)
  {
    clib_warning ("BUG");
  }
  
  static void
  vl_api_ip_fib_details_t_print (vl_api_ip_fib_details_t * mp)
  {
    clib_warning ("BUG");
  }
  
  static void
  send_ip_fib_details (vpe_api_main_t * am,
  		     unix_shared_memory_queue_t * q,
  		     u32 table_id, fib_prefix_t * pfx,
  		     fib_route_path_encode_t * api_rpaths, u32 context)
  {
    vl_api_ip_fib_details_t *mp;
    fib_route_path_encode_t *api_rpath;
    vl_api_fib_path_t *fp;
    int path_count;
  
    path_count = vec_len (api_rpaths);
    mp = vl_msg_api_alloc (sizeof (*mp) + path_count * sizeof (*fp));
    if (!mp)
      return;
    memset (mp, 0, sizeof (*mp));
    mp->_vl_msg_id = ntohs (VL_API_IP_FIB_DETAILS);
    mp->context = context;
  
    mp->table_id = htonl (table_id);
    mp->address_length = pfx->fp_len;
    memcpy (mp->address, &pfx->fp_addr.ip4, sizeof (pfx->fp_addr.ip4));
  
    mp->count = htonl (path_count);
    fp = mp->path;
    vec_foreach (api_rpath, api_rpaths)
    {
      memset (fp, 0, sizeof (*fp));
      switch (api_rpath->dpo.dpoi_type)
        {
        case DPO_RECEIVE:
  	fp->is_local = true;
  	break;
        case DPO_DROP:
  	fp->is_drop = true;
  	break;
        case DPO_IP_NULL:
  	switch (api_rpath->dpo.dpoi_index)
  	  {
  	  case IP_NULL_ACTION_NONE:
  	    fp->is_drop = true;
  	    break;
  	  case IP_NULL_ACTION_SEND_ICMP_UNREACH:
  	    fp->is_unreach = true;
  	    break;
  	  case IP_NULL_ACTION_SEND_ICMP_PROHIBIT:
  	    fp->is_prohibit = true;
  	    break;
  	  default:
  	    break;
  	  }
  	break;
        default:
  	break;
        }
      fp->weight = htonl (api_rpath->rpath.frp_weight);
      fp->sw_if_index = htonl (api_rpath->rpath.frp_sw_if_index);
      copy_fib_next_hop (api_rpath, fp);
      fp++;
    }
  
    vl_msg_api_send_shmem (q, (u8 *) & mp);
  }
  
  static void
  vl_api_ip_fib_dump_t_handler (vl_api_ip_fib_dump_t * mp)
  {
    vpe_api_main_t *am = &vpe_api_main;
    unix_shared_memory_queue_t *q;
    ip4_main_t *im = &ip4_main;
    fib_table_t *fib_table;
    fib_node_index_t lfei, *lfeip, *lfeis = NULL;
    mpls_label_t key;
    fib_prefix_t pfx;
    u32 fib_index;
    fib_route_path_encode_t *api_rpaths;
    int i;
  
    q = vl_api_client_index_to_input_queue (mp->client_index);
    if (q == 0)
      return;
  
    /* *INDENT-OFF* */
    pool_foreach (fib_table, im->fibs,
    ({
      for (i = 0; i < ARRAY_LEN (fib_table->v4.fib_entry_by_dst_address); i++)
        {
          hash_foreach(key, lfei, fib_table->v4.fib_entry_by_dst_address[i],
          ({
            vec_add1(lfeis, lfei);
          }));
        }
    }));
    /* *INDENT-ON* */
  
    vec_sort_with_function (lfeis, fib_entry_cmp_for_sort);
  
    vec_foreach (lfeip, lfeis)
    {
      fib_entry_get_prefix (*lfeip, &pfx);
      fib_index = fib_entry_get_fib_index (*lfeip);
      fib_table = fib_table_get (fib_index, pfx.fp_proto);
      api_rpaths = NULL;
      fib_entry_encode (*lfeip, &api_rpaths);
      send_ip_fib_details (am, q,
  			 fib_table->ft_table_id, &pfx, api_rpaths,
  			 mp->context);
      vec_free (api_rpaths);
    }
  
    vec_free (lfeis);
  }
  
  static void
  vl_api_ip6_fib_details_t_handler (vl_api_ip6_fib_details_t * mp)
  {
    clib_warning ("BUG");
  }
  
  static void
  vl_api_ip6_fib_details_t_endian (vl_api_ip6_fib_details_t * mp)
  {
    clib_warning ("BUG");
  }
  
  static void
  vl_api_ip6_fib_details_t_print (vl_api_ip6_fib_details_t * mp)
  {
    clib_warning ("BUG");
  }
  
  static void
  send_ip6_fib_details (vpe_api_main_t * am,
  		      unix_shared_memory_queue_t * q,
  		      u32 table_id, fib_prefix_t * pfx,
  		      fib_route_path_encode_t * api_rpaths, u32 context)
  {
    vl_api_ip6_fib_details_t *mp;
    fib_route_path_encode_t *api_rpath;
    vl_api_fib_path_t *fp;
    int path_count;
  
    path_count = vec_len (api_rpaths);
    mp = vl_msg_api_alloc (sizeof (*mp) + path_count * sizeof (*fp));
    if (!mp)
      return;
    memset (mp, 0, sizeof (*mp));
    mp->_vl_msg_id = ntohs (VL_API_IP6_FIB_DETAILS);
    mp->context = context;
  
    mp->table_id = htonl (table_id);
    mp->address_length = pfx->fp_len;
    memcpy (mp->address, &pfx->fp_addr.ip6, sizeof (pfx->fp_addr.ip6));
  
    mp->count = htonl (path_count);
    fp = mp->path;
    vec_foreach (api_rpath, api_rpaths)
    {
      memset (fp, 0, sizeof (*fp));
      switch (api_rpath->dpo.dpoi_type)
        {
        case DPO_RECEIVE:
  	fp->is_local = true;
  	break;
        case DPO_DROP:
  	fp->is_drop = true;
  	break;
        case DPO_IP_NULL:
  	switch (api_rpath->dpo.dpoi_index)
  	  {
  	  case IP_NULL_DPO_ACTION_NUM + IP_NULL_ACTION_NONE:
  	    fp->is_drop = true;
  	    break;
  	  case IP_NULL_DPO_ACTION_NUM + IP_NULL_ACTION_SEND_ICMP_UNREACH:
  	    fp->is_unreach = true;
  	    break;
  	  case IP_NULL_DPO_ACTION_NUM + IP_NULL_ACTION_SEND_ICMP_PROHIBIT:
  	    fp->is_prohibit = true;
  	    break;
  	  default:
  	    break;
  	  }
  	break;
        default:
  	break;
        }
      fp->weight = htonl (api_rpath->rpath.frp_weight);
      fp->sw_if_index = htonl (api_rpath->rpath.frp_sw_if_index);
      copy_fib_next_hop (api_rpath, fp);
      fp++;
    }
  
    vl_msg_api_send_shmem (q, (u8 *) & mp);
  }
  
  typedef struct apt_ip6_fib_show_ctx_t_
  {
    u32 fib_index;
    fib_node_index_t *entries;
  } api_ip6_fib_show_ctx_t;
  
  static void
  api_ip6_fib_table_put_entries (clib_bihash_kv_24_8_t * kvp, void *arg)
  {
    api_ip6_fib_show_ctx_t *ctx = arg;
  
    if ((kvp->key[2] >> 32) == ctx->fib_index)
      {
        vec_add1 (ctx->entries, kvp->value);
      }
  }
  
  static void
  api_ip6_fib_table_get_all (unix_shared_memory_queue_t * q,
  			   vl_api_ip6_fib_dump_t * mp,
  			   fib_table_t * fib_table)
  {
    vpe_api_main_t *am = &vpe_api_main;
    ip6_main_t *im6 = &ip6_main;
    ip6_fib_t *fib = &fib_table->v6;
    fib_node_index_t *fib_entry_index;
    api_ip6_fib_show_ctx_t ctx = {
      .fib_index = fib->index,.entries = NULL,
    };
    fib_route_path_encode_t *api_rpaths;
    fib_prefix_t pfx;
  
    BV (clib_bihash_foreach_key_value_pair)
      ((BVT (clib_bihash) *) & im6->ip6_table[IP6_FIB_TABLE_NON_FWDING].
       ip6_hash, api_ip6_fib_table_put_entries, &ctx);
  
    vec_sort_with_function (ctx.entries, fib_entry_cmp_for_sort);
  
    vec_foreach (fib_entry_index, ctx.entries)
    {
      fib_entry_get_prefix (*fib_entry_index, &pfx);
      api_rpaths = NULL;
      fib_entry_encode (*fib_entry_index, &api_rpaths);
      send_ip6_fib_details (am, q,
  			  fib_table->ft_table_id,
  			  &pfx, api_rpaths, mp->context);
      vec_free (api_rpaths);
    }
  
    vec_free (ctx.entries);
  }
  
  static void
  vl_api_ip6_fib_dump_t_handler (vl_api_ip6_fib_dump_t * mp)
  {
    unix_shared_memory_queue_t *q;
    ip6_main_t *im6 = &ip6_main;
    fib_table_t *fib_table;
  
    q = vl_api_client_index_to_input_queue (mp->client_index);
    if (q == 0)
      return;
  
    /* *INDENT-OFF* */
    pool_foreach (fib_table, im6->fibs,
    ({
      api_ip6_fib_table_get_all(q, mp, fib_table);
    }));
    /* *INDENT-ON* */
  }
  
  static void
  vl_api_ip_neighbor_add_del_t_handler (vl_api_ip_neighbor_add_del_t * mp,
  				      vlib_main_t * vm)
  {
    vl_api_ip_neighbor_add_del_reply_t *rmp;
    vnet_main_t *vnm = vnet_get_main ();
    int rv = 0;
  
    VALIDATE_SW_IF_INDEX (mp);
  
    stats_dslock_with_hint (1 /* release hint */ , 7 /* tag */ );
  
    /*
     * there's no validation here of the ND/ARP entry being added.
     * The expectation is that the FIB will ensure that nothing bad
     * will come of adding bogus entries.
     */
    if (mp->is_ipv6)
      {
        if (mp->is_add)
  	rv = vnet_set_ip6_ethernet_neighbor
  	  (vm, ntohl (mp->sw_if_index),
  	   (ip6_address_t *) (mp->dst_address),
  	   mp->mac_address, sizeof (mp->mac_address), mp->is_static);
        else
  	rv = vnet_unset_ip6_ethernet_neighbor
  	  (vm, ntohl (mp->sw_if_index),
  	   (ip6_address_t *) (mp->dst_address),
  	   mp->mac_address, sizeof (mp->mac_address));
      }
    else
      {
        ethernet_arp_ip4_over_ethernet_address_t a;
  
        clib_memcpy (&a.ethernet, mp->mac_address, 6);
        clib_memcpy (&a.ip4, mp->dst_address, 4);
  
        if (mp->is_add)
  	rv = vnet_arp_set_ip4_over_ethernet (vnm, ntohl (mp->sw_if_index),
  					     &a, mp->is_static);
        else
  	rv =
  	  vnet_arp_unset_ip4_over_ethernet (vnm, ntohl (mp->sw_if_index), &a);
      }
  
    BAD_SW_IF_INDEX_LABEL;
  
    stats_dsunlock ();
    REPLY_MACRO (VL_API_IP_NEIGHBOR_ADD_DEL_REPLY);
  }
  
  int
  add_del_route_t_handler (u8 is_multipath,
  			 u8 is_add,
  			 u8 is_drop,
  			 u8 is_unreach,
  			 u8 is_prohibit,
  			 u8 is_local,
  			 u8 is_classify,
  			 u32 classify_table_index,
  			 u8 is_resolve_host,
  			 u8 is_resolve_attached,
  			 u32 fib_index,
  			 const fib_prefix_t * prefix,
  			 u8 next_hop_proto_is_ip4,
  			 const ip46_address_t * next_hop,
  			 u32 next_hop_sw_if_index,
  			 u8 next_hop_fib_index,
  			 u32 next_hop_weight,
  			 mpls_label_t next_hop_via_label,
  			 mpls_label_t * next_hop_out_label_stack)
  {
    vnet_classify_main_t *cm = &vnet_classify_main;
    fib_route_path_flags_t path_flags = FIB_ROUTE_PATH_FLAG_NONE;
    fib_route_path_t path = {
      .frp_proto = (next_hop_proto_is_ip4 ?
  		  FIB_PROTOCOL_IP4 : FIB_PROTOCOL_IP6),
      .frp_addr = (NULL == next_hop ? zero_addr : *next_hop),
      .frp_sw_if_index = next_hop_sw_if_index,
      .frp_fib_index = next_hop_fib_index,
      .frp_weight = next_hop_weight,
      .frp_label_stack = next_hop_out_label_stack,
    };
    fib_route_path_t *paths = NULL;
  
    if (MPLS_LABEL_INVALID != next_hop_via_label)
      {
        path.frp_proto = FIB_PROTOCOL_MPLS;
        path.frp_local_label = next_hop_via_label;
      }
    if (is_resolve_host)
      path_flags |= FIB_ROUTE_PATH_RESOLVE_VIA_HOST;
    if (is_resolve_attached)
      path_flags |= FIB_ROUTE_PATH_RESOLVE_VIA_ATTACHED;
  
    path.frp_flags = path_flags;
  
    if (is_multipath)
      {
        stats_dslock_with_hint (1 /* release hint */ , 10 /* tag */ );
  
  
        vec_add1 (paths, path);
  
        if (is_add)
  	fib_table_entry_path_add2 (fib_index,
  				   prefix,
  				   FIB_SOURCE_API,
  				   FIB_ENTRY_FLAG_NONE, paths);
        else
  	fib_table_entry_path_remove2 (fib_index,
  				      prefix, FIB_SOURCE_API, paths);
  
        vec_free (paths);
        stats_dsunlock ();
        return 0;
      }
  
    stats_dslock_with_hint (1 /* release hint */ , 2 /* tag */ );
  
    if (is_drop || is_local || is_classify || is_unreach || is_prohibit)
      {
        /*
         * special route types that link directly to the adj
         */
        if (is_add)
  	{
  	  dpo_id_t dpo = DPO_INVALID;
  	  dpo_proto_t dproto;
  
  	  dproto = fib_proto_to_dpo (prefix->fp_proto);
  
  	  if (is_drop)
  	    ip_null_dpo_add_and_lock (dproto, IP_NULL_ACTION_NONE, &dpo);
  	  else if (is_local)
  	    receive_dpo_add_or_lock (dproto, ~0, NULL, &dpo);
  	  else if (is_unreach)
  	    ip_null_dpo_add_and_lock (dproto,
  				      IP_NULL_ACTION_SEND_ICMP_UNREACH, &dpo);
  	  else if (is_prohibit)
  	    ip_null_dpo_add_and_lock (dproto,
  				      IP_NULL_ACTION_SEND_ICMP_PROHIBIT,
  				      &dpo);
  	  else if (is_classify)
  	    {
  	      if (pool_is_free_index (cm->tables,
  				      ntohl (classify_table_index)))
  		{
  		  stats_dsunlock ();
  		  return VNET_API_ERROR_NO_SUCH_TABLE;
  		}
  
  	      dpo_set (&dpo, DPO_CLASSIFY, dproto,
  		       classify_dpo_create (dproto,
  					    ntohl (classify_table_index)));
  	    }
  	  else
  	    {
  	      stats_dsunlock ();
  	      return VNET_API_ERROR_NO_SUCH_TABLE;
  	    }
  
  	  fib_table_entry_special_dpo_update (fib_index,
  					      prefix,
  					      FIB_SOURCE_API,
  					      FIB_ENTRY_FLAG_EXCLUSIVE, &dpo);
  	  dpo_reset (&dpo);
  	}
        else
  	{
  	  fib_table_entry_special_remove (fib_index, prefix, FIB_SOURCE_API);
  	}
      }
    else
      {
        if (is_add)
  	{
  	  vec_add1 (paths, path);
  	  fib_table_entry_update (fib_index,
  				  prefix,
  				  FIB_SOURCE_API, FIB_ENTRY_FLAG_NONE, paths);
  	  vec_free (paths);
  	}
        else
  	{
  	  fib_table_entry_delete (fib_index, prefix, FIB_SOURCE_API);
  	}
      }
  
    stats_dsunlock ();
    return (0);
  }
  
  int
  add_del_route_check (fib_protocol_t table_proto,
  		     u32 table_id,
  		     u32 next_hop_sw_if_index,
  		     fib_protocol_t next_hop_table_proto,
  		     u32 next_hop_table_id,
  		     u8 create_missing_tables,
  		     u32 * fib_index, u32 * next_hop_fib_index)
  {
    vnet_main_t *vnm = vnet_get_main ();
  
    *fib_index = fib_table_find (table_proto, ntohl (table_id));
    if (~0 == *fib_index)
      {
        if (create_missing_tables)
  	{
  	  *fib_index = fib_table_find_or_create_and_lock (table_proto,
  							  ntohl (table_id));
  	}
        else
  	{
  	  /* No such VRF, and we weren't asked to create one */
  	  return VNET_API_ERROR_NO_SUCH_FIB;
  	}
      }
  
    if (~0 != ntohl (next_hop_sw_if_index))
      {
        if (pool_is_free_index (vnm->interface_main.sw_interfaces,
  			      ntohl (next_hop_sw_if_index)))
  	{
  	  return VNET_API_ERROR_NO_MATCHING_INTERFACE;
  	}
      }
    else
      {
        *next_hop_fib_index = fib_table_find (next_hop_table_proto,
  					    ntohl (next_hop_table_id));
  
        if (~0 == *next_hop_fib_index)
  	{
  	  if (create_missing_tables)
  	    {
  	      *next_hop_fib_index =
  		fib_table_find_or_create_and_lock (next_hop_table_proto,
  						   ntohl (next_hop_table_id));
  	    }
  	  else
  	    {
  	      /* No such VRF, and we weren't asked to create one */
  	      return VNET_API_ERROR_NO_SUCH_FIB;
  	    }
  	}
      }
  
    return (0);
  }
  
  static int
  ip4_add_del_route_t_handler (vl_api_ip_add_del_route_t * mp)
  {
    u32 fib_index, next_hop_fib_index;
    mpls_label_t *label_stack = NULL;
    int rv, ii, n_labels;;
  
    rv = add_del_route_check (FIB_PROTOCOL_IP4,
  			    mp->table_id,
  			    mp->next_hop_sw_if_index,
  			    FIB_PROTOCOL_IP4,
  			    mp->next_hop_table_id,
  			    mp->create_vrf_if_needed,
  			    &fib_index, &next_hop_fib_index);
  
    if (0 != rv)
      return (rv);
  
    fib_prefix_t pfx = {
      .fp_len = mp->dst_address_length,
      .fp_proto = FIB_PROTOCOL_IP4,
    };
    clib_memcpy (&pfx.fp_addr.ip4, mp->dst_address, sizeof (pfx.fp_addr.ip4));
  
    ip46_address_t nh;
    memset (&nh, 0, sizeof (nh));
    memcpy (&nh.ip4, mp->next_hop_address, sizeof (nh.ip4));
  
    n_labels = mp->next_hop_n_out_labels;
    if (n_labels == 0)
      ;
    else if (1 == n_labels)
      vec_add1 (label_stack, ntohl (mp->next_hop_out_label_stack[0]));
    else
      {
        vec_validate (label_stack, n_labels - 1);
        for (ii = 0; ii < n_labels; ii++)
  	label_stack[ii] = ntohl (mp->next_hop_out_label_stack[ii]);
      }
  
    return (add_del_route_t_handler (mp->is_multipath,
  				   mp->is_add,
  				   mp->is_drop,
  				   mp->is_unreach,
  				   mp->is_prohibit,
  				   mp->is_local,
  				   mp->is_classify,
  				   mp->classify_table_index,
  				   mp->is_resolve_host,
  				   mp->is_resolve_attached,
  				   fib_index, &pfx, 1,
  				   &nh,
  				   ntohl (mp->next_hop_sw_if_index),
  				   next_hop_fib_index,
  				   mp->next_hop_weight,
  				   ntohl (mp->next_hop_via_label),
  				   label_stack));
  }
  
  static int
  ip6_add_del_route_t_handler (vl_api_ip_add_del_route_t * mp)
  {
    u32 fib_index, next_hop_fib_index;
    mpls_label_t *label_stack = NULL;
    int rv, ii, n_labels;;
  
    rv = add_del_route_check (FIB_PROTOCOL_IP6,
  			    mp->table_id,
  			    mp->next_hop_sw_if_index,
  			    FIB_PROTOCOL_IP6,
  			    mp->next_hop_table_id,
  			    mp->create_vrf_if_needed,
  			    &fib_index, &next_hop_fib_index);
  
    if (0 != rv)
      return (rv);
  
    fib_prefix_t pfx = {
      .fp_len = mp->dst_address_length,
      .fp_proto = FIB_PROTOCOL_IP6,
    };
    clib_memcpy (&pfx.fp_addr.ip6, mp->dst_address, sizeof (pfx.fp_addr.ip6));
  
    ip46_address_t nh;
    memset (&nh, 0, sizeof (nh));
    memcpy (&nh.ip6, mp->next_hop_address, sizeof (nh.ip6));
  
    n_labels = mp->next_hop_n_out_labels;
    if (n_labels == 0)
      ;
    else if (1 == n_labels)
      vec_add1 (label_stack, ntohl (mp->next_hop_out_label_stack[0]));
    else
      {
        vec_validate (label_stack, n_labels - 1);
        for (ii = 0; ii < n_labels; ii++)
  	label_stack[ii] = ntohl (mp->next_hop_out_label_stack[ii]);
      }
  
    return (add_del_route_t_handler (mp->is_multipath,
  				   mp->is_add,
  				   mp->is_drop,
  				   mp->is_unreach,
  				   mp->is_prohibit,
  				   mp->is_local,
  				   mp->is_classify,
  				   mp->classify_table_index,
  				   mp->is_resolve_host,
  				   mp->is_resolve_attached,
  				   fib_index, &pfx, 0,
  				   &nh, ntohl (mp->next_hop_sw_if_index),
  				   next_hop_fib_index,
  				   mp->next_hop_weight,
  				   ntohl (mp->next_hop_via_label),
  				   label_stack));
  }
  
  void
  vl_api_ip_add_del_route_t_handler (vl_api_ip_add_del_route_t * mp)
  {
    vl_api_ip_add_del_route_reply_t *rmp;
    int rv;
    vnet_main_t *vnm = vnet_get_main ();
  
    vnm->api_errno = 0;
  
    if (mp->is_ipv6)
      rv = ip6_add_del_route_t_handler (mp);
    else
      rv = ip4_add_del_route_t_handler (mp);
  
    rv = (rv == 0) ? vnm->api_errno : rv;
  
    REPLY_MACRO (VL_API_IP_ADD_DEL_ROUTE_REPLY);
  }
  
  static void
  send_ip_details (vpe_api_main_t * am,
  		 unix_shared_memory_queue_t * q, u32 sw_if_index, u32 context)
  {
    vl_api_ip_details_t *mp;
  
    mp = vl_msg_api_alloc (sizeof (*mp));
    memset (mp, 0, sizeof (*mp));
    mp->_vl_msg_id = ntohs (VL_API_IP_DETAILS);
  
    mp->sw_if_index = ntohl (sw_if_index);
    mp->context = context;
  
    vl_msg_api_send_shmem (q, (u8 *) & mp);
  }
  
  static void
  send_ip_address_details (vpe_api_main_t * am,
  			 unix_shared_memory_queue_t * q,
  			 u8 * ip, u16 prefix_length, u8 is_ipv6, u32 context)
  {
    vl_api_ip_address_details_t *mp;
  
    mp = vl_msg_api_alloc (sizeof (*mp));
    memset (mp, 0, sizeof (*mp));
    mp->_vl_msg_id = ntohs (VL_API_IP_ADDRESS_DETAILS);
  
    if (is_ipv6)
      {
        clib_memcpy (&mp->ip, ip, sizeof (mp->ip));
      }
    else
      {
        u32 *tp = (u32 *) mp->ip;
        *tp = *(u32 *) ip;
      }
    mp->prefix_length = prefix_length;
    mp->context = context;
  
    vl_msg_api_send_shmem (q, (u8 *) & mp);
  }
  
  static void
  vl_api_ip_address_dump_t_handler (vl_api_ip_address_dump_t * mp)
  {
    vpe_api_main_t *am = &vpe_api_main;
    unix_shared_memory_queue_t *q;
    ip6_address_t *r6;
    ip4_address_t *r4;
    ip6_main_t *im6 = &ip6_main;
    ip4_main_t *im4 = &ip4_main;
    ip_lookup_main_t *lm6 = &im6->lookup_main;
    ip_lookup_main_t *lm4 = &im4->lookup_main;
    ip_interface_address_t *ia = 0;
    u32 sw_if_index = ~0;
    int rv __attribute__ ((unused)) = 0;
  
    VALIDATE_SW_IF_INDEX (mp);
  
    sw_if_index = ntohl (mp->sw_if_index);
  
    q = vl_api_client_index_to_input_queue (mp->client_index);
    if (q == 0)
      return;
  
    if (mp->is_ipv6)
      {
        /* *INDENT-OFF* */
        foreach_ip_interface_address (lm6, ia, sw_if_index,
                                      1 /* honor unnumbered */,
        ({
          r6 = ip_interface_address_get_address (lm6, ia);
          u16 prefix_length = ia->address_length;
          send_ip_address_details(am, q, (u8*)r6, prefix_length, 1, mp->context);
        }));
        /* *INDENT-ON* */
      }
    else
      {
        /* *INDENT-OFF* */
        foreach_ip_interface_address (lm4, ia, sw_if_index,
                                      1 /* honor unnumbered */,
        ({
          r4 = ip_interface_address_get_address (lm4, ia);
          u16 prefix_length = ia->address_length;
          send_ip_address_details(am, q, (u8*)r4, prefix_length, 0, mp->context);
        }));
        /* *INDENT-ON* */
      }
    BAD_SW_IF_INDEX_LABEL;
  }
  
  static void
  vl_api_ip_dump_t_handler (vl_api_ip_dump_t * mp)
  {
    vpe_api_main_t *am = &vpe_api_main;
    vnet_main_t *vnm = vnet_get_main ();
    vlib_main_t *vm = vlib_get_main ();
    vnet_interface_main_t *im = &vnm->interface_main;
    unix_shared_memory_queue_t *q;
    vnet_sw_interface_t *si, *sorted_sis;
    u32 sw_if_index = ~0;
  
    q = vl_api_client_index_to_input_queue (mp->client_index);
    if (q == 0)
      {
        return;
      }
  
    /* Gather interfaces. */
    sorted_sis = vec_new (vnet_sw_interface_t, pool_elts (im->sw_interfaces));
    _vec_len (sorted_sis) = 0;
    /* *INDENT-OFF* */
    pool_foreach (si, im->sw_interfaces,
    ({
      vec_add1 (sorted_sis, si[0]);
    }));
    /* *INDENT-ON* */
  
    vec_foreach (si, sorted_sis)
    {
      if (!(si->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED))
        {
  	if (mp->is_ipv6 && !ip6_interface_enabled (vm, si->sw_if_index))
  	  {
  	    continue;
  	  }
  	sw_if_index = si->sw_if_index;
  	send_ip_details (am, q, sw_if_index, mp->context);
        }
    }
  }
  
  static void
  set_ip6_flow_hash (vl_api_set_ip_flow_hash_t * mp)
  {
    vl_api_set_ip_flow_hash_reply_t *rmp;
    int rv = VNET_API_ERROR_UNIMPLEMENTED;
  
    clib_warning ("unimplemented...");
  
    REPLY_MACRO (VL_API_SET_IP_FLOW_HASH_REPLY);
  }
  
  static void
  set_ip4_flow_hash (vl_api_set_ip_flow_hash_t * mp)
  {
    vl_api_set_ip_flow_hash_reply_t *rmp;
    int rv;
    u32 table_id;
    flow_hash_config_t flow_hash_config = 0;
  
    table_id = ntohl (mp->vrf_id);
  
  #define _(a,b) if (mp->a) flow_hash_config |= b;
    foreach_flow_hash_bit;
  #undef _
  
    rv = vnet_set_ip4_flow_hash (table_id, flow_hash_config);
  
    REPLY_MACRO (VL_API_SET_IP_FLOW_HASH_REPLY);
  }
  
  
  static void
  vl_api_set_ip_flow_hash_t_handler (vl_api_set_ip_flow_hash_t * mp)
  {
    if (mp->is_ipv6 == 0)
      set_ip4_flow_hash (mp);
    else
      set_ip6_flow_hash (mp);
  }
  
  static void
    vl_api_sw_interface_ip6nd_ra_config_t_handler
    (vl_api_sw_interface_ip6nd_ra_config_t * mp)
  {
    vl_api_sw_interface_ip6nd_ra_config_reply_t *rmp;
    vlib_main_t *vm = vlib_get_main ();
    int rv = 0;
    u8 is_no, suppress, managed, other, ll_option, send_unicast, cease,
      default_router;
  
    is_no = mp->is_no == 1;
    suppress = mp->suppress == 1;
    managed = mp->managed == 1;
    other = mp->other == 1;
    ll_option = mp->ll_option == 1;
    send_unicast = mp->send_unicast == 1;
    cease = mp->cease == 1;
    default_router = mp->default_router == 1;
  
    VALIDATE_SW_IF_INDEX (mp);
  
    rv = ip6_neighbor_ra_config (vm, ntohl (mp->sw_if_index),
  			       suppress, managed, other,
  			       ll_option, send_unicast, cease,
  			       default_router, ntohl (mp->lifetime),
  			       ntohl (mp->initial_count),
  			       ntohl (mp->initial_interval),
  			       ntohl (mp->max_interval),
  			       ntohl (mp->min_interval), is_no);
  
    BAD_SW_IF_INDEX_LABEL;
  
    REPLY_MACRO (VL_API_SW_INTERFACE_IP6ND_RA_CONFIG_REPLY);
  }
  
  static void
    vl_api_sw_interface_ip6nd_ra_prefix_t_handler
    (vl_api_sw_interface_ip6nd_ra_prefix_t * mp)
  {
    vlib_main_t *vm = vlib_get_main ();
    vl_api_sw_interface_ip6nd_ra_prefix_reply_t *rmp;
    int rv = 0;
    u8 is_no, use_default, no_advertise, off_link, no_autoconfig, no_onlink;
  
    VALIDATE_SW_IF_INDEX (mp);
  
    is_no = mp->is_no == 1;
    use_default = mp->use_default == 1;
    no_advertise = mp->no_advertise == 1;
    off_link = mp->off_link == 1;
    no_autoconfig = mp->no_autoconfig == 1;
    no_onlink = mp->no_onlink == 1;
  
    rv = ip6_neighbor_ra_prefix (vm, ntohl (mp->sw_if_index),
  			       (ip6_address_t *) mp->address,
  			       mp->address_length, use_default,
  			       ntohl (mp->val_lifetime),
  			       ntohl (mp->pref_lifetime), no_advertise,
  			       off_link, no_autoconfig, no_onlink, is_no);
  
    BAD_SW_IF_INDEX_LABEL;
    REPLY_MACRO (VL_API_SW_INTERFACE_IP6ND_RA_PREFIX_REPLY);
  }
  
  static void
    vl_api_sw_interface_ip6_enable_disable_t_handler
    (vl_api_sw_interface_ip6_enable_disable_t * mp)
  {
    vlib_main_t *vm = vlib_get_main ();
    vl_api_sw_interface_ip6_enable_disable_reply_t *rmp;
    vnet_main_t *vnm = vnet_get_main ();
    int rv = 0;
    clib_error_t *error;
  
    vnm->api_errno = 0;
  
    VALIDATE_SW_IF_INDEX (mp);
  
    error =
      (mp->enable == 1) ? enable_ip6_interface (vm,
  					      ntohl (mp->sw_if_index)) :
      disable_ip6_interface (vm, ntohl (mp->sw_if_index));
  
    if (error)
      {
        clib_error_report (error);
        rv = VNET_API_ERROR_UNSPECIFIED;
      }
    else
      {
        rv = vnm->api_errno;
      }
  
    BAD_SW_IF_INDEX_LABEL;
  
    REPLY_MACRO (VL_API_SW_INTERFACE_IP6_ENABLE_DISABLE_REPLY);
  }
  
  static void
    vl_api_sw_interface_ip6_set_link_local_address_t_handler
    (vl_api_sw_interface_ip6_set_link_local_address_t * mp)
  {
    vlib_main_t *vm = vlib_get_main ();
    vl_api_sw_interface_ip6_set_link_local_address_reply_t *rmp;
    int rv = 0;
    clib_error_t *error;
    vnet_main_t *vnm = vnet_get_main ();
  
    vnm->api_errno = 0;
  
    VALIDATE_SW_IF_INDEX (mp);
  
    error = set_ip6_link_local_address (vm,
  				      ntohl (mp->sw_if_index),
  				      (ip6_address_t *) mp->address,
  				      mp->address_length);
    if (error)
      {
        clib_error_report (error);
        rv = VNET_API_ERROR_UNSPECIFIED;
      }
    else
      {
        rv = vnm->api_errno;
      }
  
    BAD_SW_IF_INDEX_LABEL;
  
    REPLY_MACRO (VL_API_SW_INTERFACE_IP6_SET_LINK_LOCAL_ADDRESS_REPLY);
  }
  
  
  #define vl_msg_name_crc_list
  #include <vnet/ip/ip.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_ip;
  #undef _
  }
  
  static clib_error_t *
  ip_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_ip_api_msg;
  #undef _
  
    /*
     * Set up the (msg_name, crc, message-id) table
     */
    setup_message_id_table (am);
  
    return 0;
  }
  
  VLIB_API_INIT_FUNCTION (ip_api_hookup);
  
  /*
   * fd.io coding-style-patch-verification: ON
   *
   * Local Variables:
   * eval: (c-set-style "gnu")
   * End:
   */
  