src/vnet/mpls/mpls.c - fdio/vpp - Gitiles

 /*
  * mpls.c: mpls
  *
  * Copyright (c) 2012 Cisco and/or its affiliates.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at:
  *
  *     http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 #include <vnet/vnet.h>
 #include <vnet/mpls/mpls.h>
 #include <vnet/fib/ip4_fib.h>
 #include <vnet/fib/mpls_fib.h>

 const static char* mpls_eos_bit_names[] = MPLS_EOS_BITS;

 mpls_main_t mpls_main;

 u8 * format_mpls_unicast_label (u8 * s, va_list * args)
 {
   mpls_label_t label = va_arg (*args, mpls_label_t);

   switch (label) {
   case MPLS_IETF_IPV4_EXPLICIT_NULL_LABEL:
       s = format (s, "%s", MPLS_IETF_IPV4_EXPLICIT_NULL_STRING);
       break;
   case MPLS_IETF_ROUTER_ALERT_LABEL:
       s = format (s, "%s", MPLS_IETF_ROUTER_ALERT_STRING);
       break;
   case MPLS_IETF_IPV6_EXPLICIT_NULL_LABEL:
       s = format (s, "%s", MPLS_IETF_IPV6_EXPLICIT_NULL_STRING);
       break;
   case MPLS_IETF_IMPLICIT_NULL_LABEL:
       s = format (s, "%s", MPLS_IETF_IMPLICIT_NULL_STRING);
       break;
   case MPLS_IETF_ELI_LABEL:
       s = format (s, "%s", MPLS_IETF_ELI_STRING);
       break;
   case MPLS_IETF_GAL_LABEL:
       s = format (s, "%s", MPLS_IETF_GAL_STRING);
       break;
   default:
       s = format (s, "%d", label);
       break;
   }
   return s;
 }

 uword unformat_mpls_unicast_label (unformat_input_t * input, va_list * args)
 {
   mpls_label_t *label = va_arg (*args, mpls_label_t*);

   if (unformat (input, MPLS_IETF_IPV4_EXPLICIT_NULL_STRING))
       *label = MPLS_IETF_IPV4_EXPLICIT_NULL_LABEL;
   else if (unformat (input, MPLS_IETF_IPV6_EXPLICIT_NULL_STRING))
       *label = MPLS_IETF_IPV6_EXPLICIT_NULL_LABEL;
   else if (unformat (input, MPLS_IETF_ROUTER_ALERT_STRING))
       *label = MPLS_IETF_ROUTER_ALERT_LABEL;
   else if (unformat (input, MPLS_IETF_IMPLICIT_NULL_STRING))
       *label = MPLS_IETF_IMPLICIT_NULL_LABEL;
   else if (unformat (input, "%d", label))
       ;

   return (1);
 }

 u8 * format_mpls_eos_bit (u8 * s, va_list * args)
 {
   mpls_eos_bit_t eb = va_arg (*args, mpls_eos_bit_t);

   ASSERT(eb <= MPLS_EOS);

   s = format(s, "%s", mpls_eos_bit_names[eb]);

   return (s);
 }

 u8 * format_mpls_header (u8 * s, va_list * args)
 {
   mpls_unicast_header_t hdr = va_arg (*args, mpls_unicast_header_t);

   return (format(s, "[%U:%d:%d:%U]",
 		 format_mpls_unicast_label,
 		 vnet_mpls_uc_get_label(hdr.label_exp_s_ttl),
 		 vnet_mpls_uc_get_ttl(hdr.label_exp_s_ttl),
 		 vnet_mpls_uc_get_exp(hdr.label_exp_s_ttl),
 		 format_mpls_eos_bit,
 		 vnet_mpls_uc_get_s(hdr.label_exp_s_ttl)));
 }

 uword
 unformat_mpls_header (unformat_input_t * input, va_list * args)
 {
   u8 ** result = va_arg (*args, u8 **);
   mpls_unicast_header_t _h, * h = &_h;
   u32 label, label_exp_s_ttl;

   if (! unformat (input, "MPLS %d", &label))
     return 0;

   label_exp_s_ttl = (label<<12) | (1<<8) /* s-bit */ | 0xFF;
   h->label_exp_s_ttl = clib_host_to_net_u32 (label_exp_s_ttl);

   /* Add gre, mpls headers to result. */
   {
     void * p;
     u32 h_n_bytes = sizeof (h[0]);

     vec_add2 (*result, p, h_n_bytes);
     clib_memcpy (p, h, h_n_bytes);
   }

   return 1;
 }

 uword
 unformat_mpls_label_net_byte_order (unformat_input_t * input,
                                         va_list * args)
 {
   u32 * result = va_arg (*args, u32 *);
   u32 label;

   if (!unformat (input, "MPLS: label %d", &label))
     return 0;

   label = (label<<12) | (1<<8) /* s-bit set */ | 0xFF /* ttl */;

   *result = clib_host_to_net_u32 (label);
   return 1;
 }

 u8 * format_mpls_unicast_header_host_byte_order (u8 * s, va_list * args)
 {
   mpls_unicast_header_t *h = va_arg(*args, mpls_unicast_header_t *);
   u32 label = h->label_exp_s_ttl;

   s = format (s, "label %d exp %d, s %d, ttl %d",
               vnet_mpls_uc_get_label (label),
               vnet_mpls_uc_get_exp (label),
               vnet_mpls_uc_get_s (label),
               vnet_mpls_uc_get_ttl (label));
   return s;
 }

 u8 * format_mpls_unicast_header_net_byte_order (u8 * s, va_list * args)
 {
   mpls_unicast_header_t *h = va_arg(*args, mpls_unicast_header_t *);
   mpls_unicast_header_t h_host;

   h_host.label_exp_s_ttl = clib_net_to_host_u32 (h->label_exp_s_ttl);

   return format (s, "%U", format_mpls_unicast_header_host_byte_order,
                  &h_host);
 }

 int
 mpls_dest_cmp(void * a1, void * a2)
 {
   show_mpls_fib_t * r1 = a1;
   show_mpls_fib_t * r2 = a2;

   return clib_net_to_host_u32(r1->dest) - clib_net_to_host_u32(r2->dest);
 }

 int
 mpls_fib_index_cmp(void * a1, void * a2)
 {
   show_mpls_fib_t * r1 = a1;
   show_mpls_fib_t * r2 = a2;

   return r1->fib_index - r2->fib_index;
 }

 int
 mpls_label_cmp(void * a1, void * a2)
 {
   show_mpls_fib_t * r1 = a1;
   show_mpls_fib_t * r2 = a2;

   return r1->label - r2->label;
 }

 static clib_error_t *
 vnet_mpls_local_label (vlib_main_t * vm,
                        unformat_input_t * input,
                        vlib_cli_command_t * cmd)
 {
   unformat_input_t _line_input, * line_input = &_line_input;
   fib_route_path_t *rpaths = NULL, rpath;
   u32 table_id, is_del, is_ip;
   mpls_label_t local_label;
   mpls_label_t out_label;
   clib_error_t * error;
   mpls_eos_bit_t eos;
   vnet_main_t * vnm;
   fib_prefix_t pfx;

   vnm = vnet_get_main();
   error = NULL;
   is_ip = 0;
   table_id = 0;
   eos = MPLS_EOS;
   is_del = 0;
   local_label = MPLS_LABEL_INVALID;
   memset(&pfx, 0, sizeof(pfx));

    /* Get a line of input. */
   if (! unformat_user (input, unformat_line_input, line_input))
     return 0;

   while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
     {
       memset(&rpath, 0, sizeof(rpath));

       if (unformat (line_input, "table %d", &table_id))
 	;
       else if (unformat (line_input, "del"))
 	is_del = 1;
       else if (unformat (line_input, "add"))
 	is_del = 0;
       else if (unformat (line_input, "eos"))
 	pfx.fp_eos = MPLS_EOS;
       else if (unformat (line_input, "non-eos"))
 	pfx.fp_eos = MPLS_NON_EOS;
       else if (unformat (line_input, "%U/%d",
 			 unformat_ip4_address,
 			 &pfx.fp_addr.ip4,
 			 &pfx.fp_len))
       {
 	  pfx.fp_proto = FIB_PROTOCOL_IP4;
           is_ip = 1;
       }
       else if (unformat (line_input, "%U/%d",
 			 unformat_ip6_address,
 			 &pfx.fp_addr.ip6,
 			 &pfx.fp_len))
       {
 	  pfx.fp_proto = FIB_PROTOCOL_IP6;
           is_ip = 1;
       }
       else if (unformat (line_input, "via %U %U weight %u",
 			 unformat_ip4_address,
 			 &rpath.frp_addr.ip4,
 			 unformat_vnet_sw_interface, vnm,
 			 &rpath.frp_sw_if_index,
 			 &rpath.frp_weight))
       {
 	  rpath.frp_proto = FIB_PROTOCOL_IP4;
 	  vec_add1(rpaths, rpath);
       }

       else if (unformat (line_input, "via %U %U weight %u",
 			 unformat_ip6_address,
 			 &rpath.frp_addr.ip6,
 			 unformat_vnet_sw_interface, vnm,
 			 &rpath.frp_sw_if_index,
 			 &rpath.frp_weight))
       {
 	  rpath.frp_proto = FIB_PROTOCOL_IP6;
 	  vec_add1(rpaths, rpath);
       }

       else if (unformat (line_input, "via %U %U",
 			 unformat_ip4_address,
  			 &rpath.frp_addr.ip4,
 			 unformat_vnet_sw_interface, vnm,
 			 &rpath.frp_sw_if_index))
       {
 	  rpath.frp_weight = 1;
 	  rpath.frp_proto = FIB_PROTOCOL_IP4;
 	  vec_add1(rpaths, rpath);
       }

       else if (unformat (line_input, "via %U %U",
 			 unformat_ip6_address,
  			 &rpath.frp_addr.ip6,
 			 unformat_vnet_sw_interface, vnm,
 			 &rpath.frp_sw_if_index))
       {
 	  rpath.frp_weight = 1;
 	  rpath.frp_proto = FIB_PROTOCOL_IP6;
 	  vec_add1(rpaths, rpath);
       }
       else if (unformat (line_input, "via %U next-hop-table %d",
 			 unformat_ip4_address,
   			 &rpath.frp_addr.ip4,
 			 &rpath.frp_fib_index))
       {
 	  rpath.frp_weight = 1;
 	  rpath.frp_sw_if_index = ~0;
 	  rpath.frp_proto = FIB_PROTOCOL_IP4;
 	  vec_add1(rpaths, rpath);
       }
       else if (unformat (line_input, "via %U next-hop-table %d",
 			 unformat_ip6_address,
   			 &rpath.frp_addr.ip6,
 			 &rpath.frp_fib_index))
       {
 	  rpath.frp_weight = 1;
 	  rpath.frp_sw_if_index = ~0;
 	  rpath.frp_proto = FIB_PROTOCOL_IP6;
 	  vec_add1(rpaths, rpath);
       }
       else if (unformat (line_input, "via %U",
 			 unformat_ip4_address,
   			 &rpath.frp_addr.ip4))
       {
 	  /*
 	   * the recursive next-hops are by default in the same table
 	   * as the prefix
 	   */
 	  rpath.frp_fib_index = table_id;
 	  rpath.frp_weight = 1;
 	  rpath.frp_sw_if_index = ~0;
 	  rpath.frp_proto = FIB_PROTOCOL_IP4;
 	  vec_add1(rpaths, rpath);
       }
       else if (unformat (line_input, "via %U",
 			 unformat_ip6_address,
   			 &rpath.frp_addr.ip6))
       {
 	  rpath.frp_fib_index = table_id;
 	  rpath.frp_weight = 1;
 	  rpath.frp_sw_if_index = ~0;
 	  rpath.frp_proto = FIB_PROTOCOL_IP6;
 	  vec_add1(rpaths, rpath);
       }
       else if (unformat (line_input, "%d", &local_label))
 	;
       else if (unformat (line_input,
 			 "ip4-lookup-in-table %d",
 			 &rpath.frp_fib_index))
       {
           rpath.frp_proto = FIB_PROTOCOL_IP4;
           rpath.frp_sw_if_index = FIB_NODE_INDEX_INVALID;
 	  pfx.fp_payload_proto = DPO_PROTO_IP4;
 	  vec_add1(rpaths, rpath);
       }
       else if (unformat (line_input,
 			 "ip6-lookup-in-table %d",
 			 &rpath.frp_fib_index))
       {
           rpath.frp_proto = FIB_PROTOCOL_IP6;
           rpath.frp_sw_if_index = FIB_NODE_INDEX_INVALID;
 	  vec_add1(rpaths, rpath);
 	  pfx.fp_payload_proto = DPO_PROTO_IP6;
       }
       else if (unformat (line_input,
 			 "mpls-lookup-in-table %d",
 			 &rpath.frp_fib_index))
       {
           rpath.frp_proto = FIB_PROTOCOL_MPLS;
           rpath.frp_sw_if_index = FIB_NODE_INDEX_INVALID;
 	  pfx.fp_payload_proto = DPO_PROTO_MPLS;
 	  vec_add1(rpaths, rpath);
       }
       else if (unformat (line_input, "out-label %U",
                          unformat_mpls_unicast_label,
 			 &out_label))
       {
 	  if (vec_len(rpaths) == 0)
 	  {
 	      error = clib_error_return(0 , "Paths then labels");
 	      goto done;
 	  }
 	  vec_add1(rpaths[vec_len(rpaths)-1].frp_label_stack, out_label);
       }
       else
       {
           error = clib_error_return (0, "unkown input: %U",
                                      format_unformat_error, line_input);
           goto done;
       }

     }

   if (MPLS_LABEL_INVALID == local_label)
   {
       error = clib_error_return (0, "local-label required: %U",
 				 format_unformat_error, input);
       goto done;
   }


   if (is_ip)
   {
       u32 fib_index = fib_table_find(pfx.fp_proto, table_id);

       if (FIB_NODE_INDEX_INVALID == fib_index)
       {
           error = clib_error_return (0, "%U table-id %d does not exist",
                                      format_fib_protocol, pfx.fp_proto, table_id);
           goto done;
       }

       if (is_del)
       {
           fib_table_entry_local_label_remove(fib_index, &pfx, local_label);
       }
       else
       {
           fib_table_entry_local_label_add(fib_index, &pfx, local_label);
       }
   }
   else
   {
       fib_node_index_t lfe, fib_index;
       u32 fi;

       if (NULL == rpaths)
       {
 	  error = clib_error_return(0 , "no paths");
 	  goto done;
       }

       pfx.fp_proto = FIB_PROTOCOL_MPLS;
       pfx.fp_len = 21;
       pfx.fp_label = local_label;
       pfx.fp_payload_proto = fib_proto_to_dpo(rpaths[0].frp_proto);

       /*
        * the CLI parsing stored table Ids, swap to FIB indicies
        */
       if (FIB_NODE_INDEX_INVALID == rpath.frp_sw_if_index)
       {
 	  fi = fib_table_id_find_fib_index(dpo_proto_to_fib(pfx.fp_payload_proto),
 					   rpaths[0].frp_fib_index);

 	  if (~0 == fi)
 	  {
 	      error = clib_error_return(0 , "%U Via table %d does not exist",
 					format_dpo_proto, pfx.fp_payload_proto,
 					rpaths[0].frp_fib_index);
 	      goto done;
 	  }
 	  rpaths[0].frp_fib_index = fi;
       }

       fib_index = mpls_fib_index_from_table_id(table_id);

       if (FIB_NODE_INDEX_INVALID == fib_index)
       {
           error = clib_error_return (0, "MPLS table-id %d does not exist",
                                      table_id);
           goto done;
       }

       lfe = fib_table_entry_path_add2(fib_index,
 				      &pfx,
 				      FIB_SOURCE_CLI,
 				      FIB_ENTRY_FLAG_NONE,
 				      rpaths);

       if (FIB_NODE_INDEX_INVALID == lfe)
       {
           error = clib_error_return (0, "Failed to create %U-%U in MPLS table-id %d",
                                      format_mpls_unicast_label, local_label,
                                      format_mpls_eos_bit, eos,
                                      table_id);
           goto done;
       }
   }

 done:
   return error;
 }

 VLIB_CLI_COMMAND (mpls_local_label_command, static) = {
   .path = "mpls local-label",
   .function = vnet_mpls_local_label,
   .short_help = "Create/Delete MPL local labels",
 };

 int
 mpls_fib_reset_labels (u32 fib_id)
 {
   // FIXME
   return 0;
 }

 static clib_error_t *
 mpls_init (vlib_main_t * vm)
 {
   mpls_main_t * mm = &mpls_main;
   clib_error_t * error;

   mm->vlib_main = vm;
   mm->vnet_main = vnet_get_main();

   if ((error = vlib_call_init_function (vm, ip_main_init)))
     return error;

   return vlib_call_init_function (vm, mpls_input_init);
 }

 VLIB_INIT_FUNCTION (mpls_init);

 mpls_main_t * mpls_get_main (vlib_main_t * vm)
 {
   vlib_call_init_function (vm, mpls_init);
   return &mpls_main;
 }
	/*
	* mpls.c: mpls
	*
	* Copyright (c) 2012 Cisco and/or its affiliates.
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at:
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	#include <vnet/vnet.h>
	#include <vnet/mpls/mpls.h>
	#include <vnet/fib/ip4_fib.h>
	#include <vnet/fib/mpls_fib.h>

	const static char* mpls_eos_bit_names[] = MPLS_EOS_BITS;

	mpls_main_t mpls_main;

	u8 * format_mpls_unicast_label (u8 * s, va_list * args)
	{
	mpls_label_t label = va_arg (*args, mpls_label_t);

	switch (label) {
	case MPLS_IETF_IPV4_EXPLICIT_NULL_LABEL:
	s = format (s, "%s", MPLS_IETF_IPV4_EXPLICIT_NULL_STRING);
	break;
	case MPLS_IETF_ROUTER_ALERT_LABEL:
	s = format (s, "%s", MPLS_IETF_ROUTER_ALERT_STRING);
	break;
	case MPLS_IETF_IPV6_EXPLICIT_NULL_LABEL:
	s = format (s, "%s", MPLS_IETF_IPV6_EXPLICIT_NULL_STRING);
	break;
	case MPLS_IETF_IMPLICIT_NULL_LABEL:
	s = format (s, "%s", MPLS_IETF_IMPLICIT_NULL_STRING);
	break;
	case MPLS_IETF_ELI_LABEL:
	s = format (s, "%s", MPLS_IETF_ELI_STRING);
	break;
	case MPLS_IETF_GAL_LABEL:
	s = format (s, "%s", MPLS_IETF_GAL_STRING);
	break;
	default:
	s = format (s, "%d", label);
	break;
	}
	return s;
	}

	uword unformat_mpls_unicast_label (unformat_input_t * input, va_list * args)
	{
	mpls_label_t label = va_arg (args, mpls_label_t*);

	if (unformat (input, MPLS_IETF_IPV4_EXPLICIT_NULL_STRING))
	*label = MPLS_IETF_IPV4_EXPLICIT_NULL_LABEL;
	else if (unformat (input, MPLS_IETF_IPV6_EXPLICIT_NULL_STRING))
	*label = MPLS_IETF_IPV6_EXPLICIT_NULL_LABEL;
	else if (unformat (input, MPLS_IETF_ROUTER_ALERT_STRING))
	*label = MPLS_IETF_ROUTER_ALERT_LABEL;
	else if (unformat (input, MPLS_IETF_IMPLICIT_NULL_STRING))
	*label = MPLS_IETF_IMPLICIT_NULL_LABEL;
	else if (unformat (input, "%d", label))
	;

	return (1);
	}

	u8 * format_mpls_eos_bit (u8 * s, va_list * args)
	{
	mpls_eos_bit_t eb = va_arg (*args, mpls_eos_bit_t);

	ASSERT(eb <= MPLS_EOS);

	s = format(s, "%s", mpls_eos_bit_names[eb]);

	return (s);
	}

	u8 * format_mpls_header (u8 * s, va_list * args)
	{
	mpls_unicast_header_t hdr = va_arg (*args, mpls_unicast_header_t);

	return (format(s, "[%U:%d:%d:%U]",
	format_mpls_unicast_label,
	vnet_mpls_uc_get_label(hdr.label_exp_s_ttl),
	vnet_mpls_uc_get_ttl(hdr.label_exp_s_ttl),
	vnet_mpls_uc_get_exp(hdr.label_exp_s_ttl),
	format_mpls_eos_bit,
	vnet_mpls_uc_get_s(hdr.label_exp_s_ttl)));
	}

	uword
	unformat_mpls_header (unformat_input_t * input, va_list * args)
	{
	u8 ** result = va_arg (args, u8 *);
	mpls_unicast_header_t _h, * h = &_h;
	u32 label, label_exp_s_ttl;

	if (! unformat (input, "MPLS %d", &label))
	return 0;

	label_exp_s_ttl = (label<<12) \| (1<<8) /* s-bit */ \| 0xFF;
	h->label_exp_s_ttl = clib_host_to_net_u32 (label_exp_s_ttl);

	/* Add gre, mpls headers to result. */
	{
	void * p;
	u32 h_n_bytes = sizeof (h[0]);

	vec_add2 (*result, p, h_n_bytes);
	clib_memcpy (p, h, h_n_bytes);
	}

	return 1;
	}

	uword
	unformat_mpls_label_net_byte_order (unformat_input_t * input,
	va_list * args)
	{
	u32 * result = va_arg (args, u32 );
	u32 label;

	if (!unformat (input, "MPLS: label %d", &label))
	return 0;

	label = (label<<12) \| (1<<8) /* s-bit set / \| 0xFF / ttl */;

	*result = clib_host_to_net_u32 (label);
	return 1;
	}

	u8 * format_mpls_unicast_header_host_byte_order (u8 * s, va_list * args)
	{
	mpls_unicast_header_t h = va_arg(args, mpls_unicast_header_t *);
	u32 label = h->label_exp_s_ttl;

	s = format (s, "label %d exp %d, s %d, ttl %d",
	vnet_mpls_uc_get_label (label),
	vnet_mpls_uc_get_exp (label),
	vnet_mpls_uc_get_s (label),
	vnet_mpls_uc_get_ttl (label));
	return s;
	}

	u8 * format_mpls_unicast_header_net_byte_order (u8 * s, va_list * args)
	{
	mpls_unicast_header_t h = va_arg(args, mpls_unicast_header_t *);
	mpls_unicast_header_t h_host;

	h_host.label_exp_s_ttl = clib_net_to_host_u32 (h->label_exp_s_ttl);

	return format (s, "%U", format_mpls_unicast_header_host_byte_order,
	&h_host);
	}

	int
	mpls_dest_cmp(void * a1, void * a2)
	{
	show_mpls_fib_t * r1 = a1;
	show_mpls_fib_t * r2 = a2;

	return clib_net_to_host_u32(r1->dest) - clib_net_to_host_u32(r2->dest);
	}

	int
	mpls_fib_index_cmp(void * a1, void * a2)
	{
	show_mpls_fib_t * r1 = a1;
	show_mpls_fib_t * r2 = a2;

	return r1->fib_index - r2->fib_index;
	}

	int
	mpls_label_cmp(void * a1, void * a2)
	{
	show_mpls_fib_t * r1 = a1;
	show_mpls_fib_t * r2 = a2;

	return r1->label - r2->label;
	}

	static clib_error_t *
	vnet_mpls_local_label (vlib_main_t * vm,
	unformat_input_t * input,
	vlib_cli_command_t * cmd)
	{
	unformat_input_t _line_input, * line_input = &_line_input;
	fib_route_path_t *rpaths = NULL, rpath;
	u32 table_id, is_del, is_ip;
	mpls_label_t local_label;
	mpls_label_t out_label;
	clib_error_t * error;
	mpls_eos_bit_t eos;
	vnet_main_t * vnm;
	fib_prefix_t pfx;

	vnm = vnet_get_main();
	error = NULL;
	is_ip = 0;
	table_id = 0;
	eos = MPLS_EOS;
	is_del = 0;
	local_label = MPLS_LABEL_INVALID;
	memset(&pfx, 0, sizeof(pfx));

	/* Get a line of input. */
	if (! unformat_user (input, unformat_line_input, line_input))
	return 0;

	while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
	{
	memset(&rpath, 0, sizeof(rpath));

	if (unformat (line_input, "table %d", &table_id))
	;
	else if (unformat (line_input, "del"))
	is_del = 1;
	else if (unformat (line_input, "add"))
	is_del = 0;
	else if (unformat (line_input, "eos"))
	pfx.fp_eos = MPLS_EOS;
	else if (unformat (line_input, "non-eos"))
	pfx.fp_eos = MPLS_NON_EOS;
	else if (unformat (line_input, "%U/%d",
	unformat_ip4_address,
	&pfx.fp_addr.ip4,
	&pfx.fp_len))
	{
	pfx.fp_proto = FIB_PROTOCOL_IP4;
	is_ip = 1;
	}
	else if (unformat (line_input, "%U/%d",
	unformat_ip6_address,
	&pfx.fp_addr.ip6,
	&pfx.fp_len))
	{
	pfx.fp_proto = FIB_PROTOCOL_IP6;
	is_ip = 1;
	}
	else if (unformat (line_input, "via %U %U weight %u",
	unformat_ip4_address,
	&rpath.frp_addr.ip4,
	unformat_vnet_sw_interface, vnm,
	&rpath.frp_sw_if_index,
	&rpath.frp_weight))
	{
	rpath.frp_proto = FIB_PROTOCOL_IP4;
	vec_add1(rpaths, rpath);
	}

	else if (unformat (line_input, "via %U %U weight %u",
	unformat_ip6_address,
	&rpath.frp_addr.ip6,
	unformat_vnet_sw_interface, vnm,
	&rpath.frp_sw_if_index,
	&rpath.frp_weight))
	{
	rpath.frp_proto = FIB_PROTOCOL_IP6;
	vec_add1(rpaths, rpath);
	}

	else if (unformat (line_input, "via %U %U",
	unformat_ip4_address,
	&rpath.frp_addr.ip4,
	unformat_vnet_sw_interface, vnm,
	&rpath.frp_sw_if_index))
	{
	rpath.frp_weight = 1;
	rpath.frp_proto = FIB_PROTOCOL_IP4;
	vec_add1(rpaths, rpath);
	}

	else if (unformat (line_input, "via %U %U",
	unformat_ip6_address,
	&rpath.frp_addr.ip6,
	unformat_vnet_sw_interface, vnm,
	&rpath.frp_sw_if_index))
	{
	rpath.frp_weight = 1;
	rpath.frp_proto = FIB_PROTOCOL_IP6;
	vec_add1(rpaths, rpath);
	}
	else if (unformat (line_input, "via %U next-hop-table %d",
	unformat_ip4_address,
	&rpath.frp_addr.ip4,
	&rpath.frp_fib_index))
	{
	rpath.frp_weight = 1;
	rpath.frp_sw_if_index = ~0;
	rpath.frp_proto = FIB_PROTOCOL_IP4;
	vec_add1(rpaths, rpath);
	}
	else if (unformat (line_input, "via %U next-hop-table %d",
	unformat_ip6_address,
	&rpath.frp_addr.ip6,
	&rpath.frp_fib_index))
	{
	rpath.frp_weight = 1;
	rpath.frp_sw_if_index = ~0;
	rpath.frp_proto = FIB_PROTOCOL_IP6;
	vec_add1(rpaths, rpath);
	}
	else if (unformat (line_input, "via %U",
	unformat_ip4_address,
	&rpath.frp_addr.ip4))
	{
	/*
	* the recursive next-hops are by default in the same table
	* as the prefix
	*/
	rpath.frp_fib_index = table_id;
	rpath.frp_weight = 1;
	rpath.frp_sw_if_index = ~0;
	rpath.frp_proto = FIB_PROTOCOL_IP4;
	vec_add1(rpaths, rpath);
	}
	else if (unformat (line_input, "via %U",
	unformat_ip6_address,
	&rpath.frp_addr.ip6))
	{
	rpath.frp_fib_index = table_id;
	rpath.frp_weight = 1;
	rpath.frp_sw_if_index = ~0;
	rpath.frp_proto = FIB_PROTOCOL_IP6;
	vec_add1(rpaths, rpath);
	}
	else if (unformat (line_input, "%d", &local_label))
	;
	else if (unformat (line_input,
	"ip4-lookup-in-table %d",
	&rpath.frp_fib_index))
	{
	rpath.frp_proto = FIB_PROTOCOL_IP4;
	rpath.frp_sw_if_index = FIB_NODE_INDEX_INVALID;
	pfx.fp_payload_proto = DPO_PROTO_IP4;
	vec_add1(rpaths, rpath);
	}
	else if (unformat (line_input,
	"ip6-lookup-in-table %d",
	&rpath.frp_fib_index))
	{
	rpath.frp_proto = FIB_PROTOCOL_IP6;
	rpath.frp_sw_if_index = FIB_NODE_INDEX_INVALID;
	vec_add1(rpaths, rpath);
	pfx.fp_payload_proto = DPO_PROTO_IP6;
	}
	else if (unformat (line_input,
	"mpls-lookup-in-table %d",
	&rpath.frp_fib_index))
	{
	rpath.frp_proto = FIB_PROTOCOL_MPLS;
	rpath.frp_sw_if_index = FIB_NODE_INDEX_INVALID;
	pfx.fp_payload_proto = DPO_PROTO_MPLS;
	vec_add1(rpaths, rpath);
	}
	else if (unformat (line_input, "out-label %U",
	unformat_mpls_unicast_label,
	&out_label))
	{
	if (vec_len(rpaths) == 0)
	{
	error = clib_error_return(0 , "Paths then labels");
	goto done;
	}
	vec_add1(rpaths[vec_len(rpaths)-1].frp_label_stack, out_label);
	}
	else
	{
	error = clib_error_return (0, "unkown input: %U",
	format_unformat_error, line_input);
	goto done;
	}

	}

	if (MPLS_LABEL_INVALID == local_label)
	{
	error = clib_error_return (0, "local-label required: %U",
	format_unformat_error, input);
	goto done;
	}


	if (is_ip)
	{
	u32 fib_index = fib_table_find(pfx.fp_proto, table_id);

	if (FIB_NODE_INDEX_INVALID == fib_index)
	{
	error = clib_error_return (0, "%U table-id %d does not exist",
	format_fib_protocol, pfx.fp_proto, table_id);
	goto done;
	}

	if (is_del)
	{
	fib_table_entry_local_label_remove(fib_index, &pfx, local_label);
	}
	else
	{
	fib_table_entry_local_label_add(fib_index, &pfx, local_label);
	}
	}
	else
	{
	fib_node_index_t lfe, fib_index;
	u32 fi;

	if (NULL == rpaths)
	{
	error = clib_error_return(0 , "no paths");
	goto done;
	}

	pfx.fp_proto = FIB_PROTOCOL_MPLS;
	pfx.fp_len = 21;
	pfx.fp_label = local_label;
	pfx.fp_payload_proto = fib_proto_to_dpo(rpaths[0].frp_proto);

	/*
	* the CLI parsing stored table Ids, swap to FIB indicies
	*/
	if (FIB_NODE_INDEX_INVALID == rpath.frp_sw_if_index)
	{
	fi = fib_table_id_find_fib_index(dpo_proto_to_fib(pfx.fp_payload_proto),
	rpaths[0].frp_fib_index);

	if (~0 == fi)
	{
	error = clib_error_return(0 , "%U Via table %d does not exist",
	format_dpo_proto, pfx.fp_payload_proto,
	rpaths[0].frp_fib_index);
	goto done;
	}
	rpaths[0].frp_fib_index = fi;
	}

	fib_index = mpls_fib_index_from_table_id(table_id);

	if (FIB_NODE_INDEX_INVALID == fib_index)
	{
	error = clib_error_return (0, "MPLS table-id %d does not exist",
	table_id);
	goto done;
	}

	lfe = fib_table_entry_path_add2(fib_index,
	&pfx,
	FIB_SOURCE_CLI,
	FIB_ENTRY_FLAG_NONE,
	rpaths);

	if (FIB_NODE_INDEX_INVALID == lfe)
	{
	error = clib_error_return (0, "Failed to create %U-%U in MPLS table-id %d",
	format_mpls_unicast_label, local_label,
	format_mpls_eos_bit, eos,
	table_id);
	goto done;
	}
	}

	done:
	return error;
	}

	VLIB_CLI_COMMAND (mpls_local_label_command, static) = {
	.path = "mpls local-label",
	.function = vnet_mpls_local_label,
	.short_help = "Create/Delete MPL local labels",
	};

	int
	mpls_fib_reset_labels (u32 fib_id)
	{
	// FIXME
	return 0;
	}

	static clib_error_t *
	mpls_init (vlib_main_t * vm)
	{
	mpls_main_t * mm = &mpls_main;
	clib_error_t * error;

	mm->vlib_main = vm;
	mm->vnet_main = vnet_get_main();

	if ((error = vlib_call_init_function (vm, ip_main_init)))
	return error;

	return vlib_call_init_function (vm, mpls_input_init);
	}

	VLIB_INIT_FUNCTION (mpls_init);

	mpls_main_t * mpls_get_main (vlib_main_t * vm)
	{
	vlib_call_init_function (vm, mpls_init);
	return &mpls_main;
	}