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path: root/src/plugins/nat/nat64_cli.c
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/*
 * Copyright (c) 2017 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.
 */
/**
 * @file
 * @brief NAT64 CLI
 */

#include <nat/nat64.h>
#include <nat/nat.h>
#include <vnet/fib/fib_table.h>

static clib_error_t *
nat64_add_del_pool_addr_command_fn (vlib_main_t * vm,
				    unformat_input_t * input,
				    vlib_cli_command_t * cmd)
{
  nat64_main_t *nm = &nat64_main;
  unformat_input_t _line_input, *line_input = &_line_input;
  ip4_address_t start_addr, end_addr, this_addr;
  u32 start_host_order, end_host_order;
  int i, count, rv;
  u32 vrf_id = ~0;
  u8 is_add = 1;
  clib_error_t *error = 0;

  if (nm->is_disabled)
    return clib_error_return (0,
			      "NAT64 disabled, multi thread not supported");

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

  while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
    {
      if (unformat (line_input, "%U - %U",
		    unformat_ip4_address, &start_addr,
		    unformat_ip4_address, &end_addr))
	;
      else if (unformat (line_input, "tenant-vrf %u", &vrf_id))
	;
      else if (unformat (line_input, "%U", unformat_ip4_address, &start_addr))
	end_addr = start_addr;
      else if (unformat (line_input, "del"))
	is_add = 0;
      else
	{
	  error = clib_error_return (0, "unknown input '%U'",
				     format_unformat_error, line_input);
	  goto done;
	}
    }

  start_host_order = clib_host_to_net_u32 (start_addr.as_u32);
  end_host_order = clib_host_to_net_u32 (end_addr.as_u32);

  if (end_host_order < start_host_order)
    {
      error = clib_error_return (0, "end address less than start address");
      goto done;
    }

  count = (end_host_order - start_host_order) + 1;
  this_addr = start_addr;

  for (i = 0; i < count; i++)
    {
      rv = nat64_add_del_pool_addr (&this_addr, vrf_id, is_add);

      switch (rv)
	{
	case VNET_API_ERROR_NO_SUCH_ENTRY:
	  error =
	    clib_error_return (0, "NAT64 pool address %U not exist.",
			       format_ip4_address, &this_addr);
	  goto done;
	case VNET_API_ERROR_VALUE_EXIST:
	  error =
	    clib_error_return (0, "NAT64 pool address %U exist.",
			       format_ip4_address, &this_addr);
	  goto done;
	default:
	  break;

	}
      increment_v4_address (&this_addr);
    }

done:
  unformat_free (line_input);

  return error;
}

static int
nat64_cli_pool_walk (snat_address_t * ap, void *ctx)
{
  vlib_main_t *vm = ctx;

  if (ap->fib_index != ~0)
    {
      fib_table_t *fib;
      fib = fib_table_get (ap->fib_index, FIB_PROTOCOL_IP6);
      if (!fib)
	return -1;
      vlib_cli_output (vm, " %U tenant VRF: %u", format_ip4_address,
		       &ap->addr, fib->ft_table_id);
    }
  else
    vlib_cli_output (vm, " %U", format_ip4_address, &ap->addr);

  return 0;
}

static clib_error_t *
nat64_show_pool_command_fn (vlib_main_t * vm,
			    unformat_input_t * input,
			    vlib_cli_command_t * cmd)
{
  nat64_main_t *nm = &nat64_main;

  if (nm->is_disabled)
    return clib_error_return (0,
			      "NAT64 disabled, multi thread not supported");

  vlib_cli_output (vm, "NAT64 pool:");
  nat64_pool_addr_walk (nat64_cli_pool_walk, vm);

  return 0;
}

static clib_error_t *
nat64_interface_feature_command_fn (vlib_main_t * vm,
				    unformat_input_t *
				    input, vlib_cli_command_t * cmd)
{
  nat64_main_t *nm = &nat64_main;
  unformat_input_t _line_input, *line_input = &_line_input;
  vnet_main_t *vnm = vnet_get_main ();
  clib_error_t *error = 0;
  u32 sw_if_index;
  u32 *inside_sw_if_indices = 0;
  u32 *outside_sw_if_indices = 0;
  u8 is_add = 1;
  int i, rv;

  if (nm->is_disabled)
    return clib_error_return (0,
			      "NAT64 disabled, multi thread not supported");

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

  while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
    {
      if (unformat (line_input, "in %U", unformat_vnet_sw_interface,
		    vnm, &sw_if_index))
	vec_add1 (inside_sw_if_indices, sw_if_index);
      else if (unformat (line_input, "out %U", unformat_vnet_sw_interface,
			 vnm, &sw_if_index))
	vec_add1 (outside_sw_if_indices, sw_if_index);
      else if (unformat (line_input, "del"))
	is_add = 0;
      else
	{
	  error = clib_error_return (0, "unknown input '%U'",
				     format_unformat_error, line_input);
	  goto done;
	}
    }

  if (vec_len (inside_sw_if_indices))
    {
      for (i = 0; i < vec_len (inside_sw_if_indices); i++)
	{
	  sw_if_index = inside_sw_if_indices[i];
	  rv = nat64_add_del_interface (sw_if_index, 1, is_add);
	  switch (rv)
	    {
	    case VNET_API_ERROR_NO_SUCH_ENTRY:
	      error =
		clib_error_return (0, "%U NAT64 feature not enabled.",
				   format_vnet_sw_interface_name, vnm,
				   vnet_get_sw_interface (vnm, sw_if_index));
	      goto done;
	    case VNET_API_ERROR_VALUE_EXIST:
	      error =
		clib_error_return (0, "%U NAT64 feature already enabled.",
				   format_vnet_sw_interface_name, vnm,
				   vnet_get_sw_interface (vnm, sw_if_index));
	      goto done;
	    case VNET_API_ERROR_INVALID_VALUE:
	    case VNET_API_ERROR_INVALID_VALUE_2:
	      error =
		clib_error_return (0,
				   "%U NAT64 feature enable/disable failed.",
				   format_vnet_sw_interface_name, vnm,
				   vnet_get_sw_interface (vnm, sw_if_index));
	      goto done;
	    default:
	      break;

	    }
	}
    }

  if (vec_len (outside_sw_if_indices))
    {
      for (i = 0; i < vec_len (outside_sw_if_indices); i++)
	{
	  sw_if_index = outside_sw_if_indices[i];
	  rv = nat64_add_del_interface (sw_if_index, 0, is_add);
	  switch (rv)
	    {
	    case VNET_API_ERROR_NO_SUCH_ENTRY:
	      error =
		clib_error_return (0, "%U NAT64 feature not enabled.",
				   format_vnet_sw_interface_name, vnm,
				   vnet_get_sw_interface (vnm, sw_if_index));
	      goto done;
	    case VNET_API_ERROR_VALUE_EXIST:
	      error =
		clib_error_return (0, "%U NAT64 feature already enabled.",
				   format_vnet_sw_interface_name, vnm,
				   vnet_get_sw_interface (vnm, sw_if_index));
	      goto done;
	    case VNET_API_ERROR_INVALID_VALUE:
	    case VNET_API_ERROR_INVALID_VALUE_2:
	      error =
		clib_error_return (0,
				   "%U NAT64 feature enable/disable failed.",
				   format_vnet_sw_interface_name, vnm,
				   vnet_get_sw_interface (vnm, sw_if_index));
	      goto done;
	    default:
	      break;

	    }
	}
    }

done:
  unformat_free (line_input);
  vec_free (inside_sw_if_indices);
  vec_free (outside_sw_if_indices);

  return error;
}

static int
nat64_cli_interface_walk (snat_interface_t * i, void *ctx)
{
  vlib_main_t *vm = ctx;
  vnet_main_t *vnm = vnet_get_main ();

  vlib_cli_output (vm, " %U %s", format_vnet_sw_interface_name, vnm,
		   vnet_get_sw_interface (vnm, i->sw_if_index),
		   i->is_inside ? "in" : "out");
  return 0;
}

static clib_error_t *
nat64_show_interfaces_command_fn (vlib_main_t * vm,
				  unformat_input_t *
				  input, vlib_cli_command_t * cmd)
{
  nat64_main_t *nm = &nat64_main;

  if (nm->is_disabled)
    return clib_error_return (0,
			      "NAT64 disabled, multi thread not supported");

  vlib_cli_output (vm, "NAT64 interfaces:");
  nat64_interfaces_walk (nat64_cli_interface_walk, vm);

  return 0;
}

static clib_error_t *
nat64_add_del_static_bib_command_fn (vlib_main_t *
				     vm,
				     unformat_input_t
				     * input, vlib_cli_command_t * cmd)
{
  nat64_main_t *nm = &nat64_main;
  unformat_input_t _line_input, *line_input = &_line_input;
  clib_error_t *error = 0;
  u8 is_add = 1;
  ip6_address_t in_addr;
  ip4_address_t out_addr;
  u32 in_port = 0;
  u32 out_port = 0;
  u32 vrf_id = 0, protocol;
  snat_protocol_t proto = 0;
  u8 p = 0;
  int rv;

  if (nm->is_disabled)
    return clib_error_return (0,
			      "NAT64 disabled, multi thread not supported");

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

  while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
    {
      if (unformat (line_input, "%U %u", unformat_ip6_address,
		    &in_addr, &in_port))
	;
      else if (unformat (line_input, "%U %u", unformat_ip4_address,
			 &out_addr, &out_port))
	;
      else if (unformat (line_input, "vrf %u", &vrf_id))
	;
      else if (unformat (line_input, "%U", unformat_snat_protocol, &proto))
	;
      else
	if (unformat
	    (line_input, "%U %U %u", unformat_ip6_address, &in_addr,
	     unformat_ip4_address, &out_addr, &protocol))
	p = (u8) protocol;
      else if (unformat (line_input, "del"))
	is_add = 0;
      else
	{
	  error = clib_error_return (0, "unknown input: '%U'",
				     format_unformat_error, line_input);
	  goto done;
	}
    }

  if (!p)
    {
      if (!in_port)
	{
	  error =
	    clib_error_return (0, "inside port and address  must be set");
	  goto done;
	}

      if (!out_port)
	{
	  error =
	    clib_error_return (0, "outside port and address  must be set");
	  goto done;
	}

      p = snat_proto_to_ip_proto (proto);
    }

  rv =
    nat64_add_del_static_bib_entry (&in_addr, &out_addr, (u16) in_port,
				    (u16) out_port, p, vrf_id, is_add);

  switch (rv)
    {
    case VNET_API_ERROR_NO_SUCH_ENTRY:
      error = clib_error_return (0, "NAT64 BIB entry not exist.");
      goto done;
    case VNET_API_ERROR_VALUE_EXIST:
      error = clib_error_return (0, "NAT64 BIB entry exist.");
      goto done;
    case VNET_API_ERROR_UNSPECIFIED:
      error = clib_error_return (0, "Crerate NAT64 BIB entry failed.");
      goto done;
    case VNET_API_ERROR_INVALID_VALUE:
      error =
	clib_error_return (0, "Outside addres %U and port %u already in use.",
			   format_ip4_address, &out_addr, out_port);
      goto done;
    default:
      break;
    }

done:
  unformat_free (line_input);

  return error;
}

static int
nat64_cli_bib_walk (nat64_db_bib_entry_t * bibe, void *ctx)
{
  vlib_main_t *vm = ctx;
  fib_table_t *fib;

  fib = fib_table_get (bibe->fib_index, FIB_PROTOCOL_IP6);
  if (!fib)
    return -1;

  switch (bibe->proto)
    {
    case IP_PROTOCOL_ICMP:
    case IP_PROTOCOL_TCP:
    case IP_PROTOCOL_UDP:
      vlib_cli_output (vm, " %U %u %U %u protocol %U vrf %u %s %u sessions",
		       format_ip6_address, &bibe->in_addr,
		       clib_net_to_host_u16 (bibe->in_port),
		       format_ip4_address, &bibe->out_addr,
		       clib_net_to_host_u16 (bibe->out_port),
		       format_snat_protocol,
		       ip_proto_to_snat_proto (bibe->proto), fib->ft_table_id,
		       bibe->is_static ? "static" : "dynamic", bibe->ses_num);
      break;
    default:
      vlib_cli_output (vm, " %U %U protocol %u vrf %u %s %u sessions",
		       format_ip6_address, &bibe->in_addr,
		       format_ip4_address, &bibe->out_addr,
		       bibe->proto, fib->ft_table_id,
		       bibe->is_static ? "static" : "dynamic", bibe->ses_num);
    }
  return 0;
}

static clib_error_t *
nat64_show_bib_command_fn (vlib_main_t * vm,
			   unformat_input_t * input, vlib_cli_command_t * cmd)
{
  nat64_main_t *nm = &nat64_main;
  unformat_input_t _line_input, *line_input = &_line_input;
  clib_error_t *error = 0;
  u32 proto = ~0;
  u8 p = 255;

  if (nm->is_disabled)
    return clib_error_return (0,
			      "NAT64 disabled, multi thread not supported");

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

  if (unformat (line_input, "%U", unformat_snat_protocol, &proto))
    p = snat_proto_to_ip_proto (proto);
  else if (unformat (line_input, "unknown"))
    p = 0;
  else if (unformat (line_input, "all"))
    ;
  else
    {
      error = clib_error_return (0, "unknown input: '%U'",
				 format_unformat_error, line_input);
      goto done;
    }

  if (p == 255)
    vlib_cli_output (vm, "NAT64 BIB entries:");
  else
    vlib_cli_output (vm, "NAT64 %U BIB entries:", format_snat_protocol,
		     proto);
  nat64_db_bib_walk (&nm->db, p, nat64_cli_bib_walk, vm);

done:
  unformat_free (line_input);

  return error;
}

static clib_error_t *
nat64_set_timeouts_command_fn (vlib_main_t * vm, unformat_input_t * input,
			       vlib_cli_command_t * cmd)
{
  nat64_main_t *nm = &nat64_main;
  unformat_input_t _line_input, *line_input = &_line_input;
  clib_error_t *error = 0;
  u32 timeout, tcp_trans, tcp_est, tcp_incoming_syn;

  tcp_trans = nat64_get_tcp_trans_timeout ();
  tcp_est = nat64_get_tcp_est_timeout ();
  tcp_incoming_syn = nat64_get_tcp_incoming_syn_timeout ();

  if (nm->is_disabled)
    return clib_error_return (0,
			      "NAT64 disabled, multi thread not supported");

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

  while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
    {
      if (unformat (line_input, "udp %u", &timeout))
	{
	  if (nat64_set_udp_timeout (timeout))
	    {
	      error = clib_error_return (0, "Invalid UDP timeout value");
	      goto done;
	    }
	}
      else if (unformat (line_input, "icmp %u", &timeout))
	{
	  if (nat64_set_icmp_timeout (timeout))
	    {
	      error = clib_error_return (0, "Invalid ICMP timeout value");
	      goto done;
	    }
	}
      else if (unformat (line_input, "tcp-trans %u", &tcp_trans))
	{
	  if (nat64_set_tcp_timeouts (tcp_trans, tcp_est, tcp_incoming_syn))
	    {
	      error =
		clib_error_return (0,
				   "Invalid TCP transitory timeouts value");
	      goto done;
	    }
	}
      else if (unformat (line_input, "tcp-est %u", &tcp_est))
	{
	  if (nat64_set_tcp_timeouts (tcp_trans, tcp_est, tcp_incoming_syn))
	    {
	      error =
		clib_error_return (0,
				   "Invalid TCP established timeouts value");
	      goto done;
	    }
	}
      else
	if (unformat (line_input, "tcp-incoming-syn %u", &tcp_incoming_syn))
	{
	  if (nat64_set_tcp_timeouts (tcp_trans, tcp_est, tcp_incoming_syn))
	    {
	      error =
		clib_error_return (0,
				   "Invalid TCP incoming SYN timeouts value");
	      goto done;
	    }
	}
      else if (unformat (line_input, "reset"))
	{
	  nat64_set_udp_timeout (0);
	  nat64_set_icmp_timeout (0);
	  nat64_set_tcp_timeouts (0, 0, 0);
	}
      else
	{
	  error = clib_error_return (0, "unknown input '%U'",
				     format_unformat_error, line_input);
	  goto done;
	}
    }

done:
  unformat_free (line_input);

  return error;
}

static clib_error_t *
nat64_show_timeouts_command_fn (vlib_main_t * vm, unformat_input_t * input,
				vlib_cli_command_t * cmd)
{
  nat64_main_t *nm = &nat64_main;

  if (nm->is_disabled)
    return clib_error_return (0,
			      "NAT64 disabled, multi thread not supported");

  vlib_cli_output (vm, "NAT64 session timeouts:");
  vlib_cli_output (vm, " UDP %usec", nat64_get_udp_timeout ());
  vlib_cli_output (vm, " ICMP %usec", nat64_get_icmp_timeout ());
  vlib_cli_output (vm, " TCP transitory %usec",
		   nat64_get_tcp_trans_timeout ());
  vlib_cli_output (vm, " TCP established %usec",
		   nat64_get_tcp_est_timeout ());
  vlib_cli_output (vm, " TCP incoming SYN %usec",
		   nat64_get_tcp_incoming_syn_timeout ());

  return 0;
}

static int
nat64_cli_st_walk (nat64_db_st_entry_t * ste, void *ctx)
{
  vlib_main_t *vm = ctx;
  nat64_main_t *nm = &nat64_main;
  nat64_db_bib_entry_t *bibe;
  fib_table_t *fib;

  bibe = nat64_db_bib_entry_by_index (&nm->db, ste->proto, ste->bibe_index);
  if (!bibe)
    return -1;

  fib = fib_table_get (bibe->fib_index, FIB_PROTOCOL_IP6);
  if (!fib)
    return -1;

  u32 vrf_id = fib->ft_table_id;

  if (ste->proto == IP_PROTOCOL_ICMP)
    vlib_cli_output (vm, " %U %U %u %U %U %u protocol %U vrf %u",
		     format_ip6_address, &bibe->in_addr,
		     format_ip6_address, &ste->in_r_addr,
		     clib_net_to_host_u16 (bibe->in_port),
		     format_ip4_address, &bibe->out_addr,
		     format_ip4_address, &ste->out_r_addr,
		     clib_net_to_host_u16 (bibe->out_port),
		     format_snat_protocol,
		     ip_proto_to_snat_proto (bibe->proto), vrf_id);
  else if (ste->proto == IP_PROTOCOL_TCP || ste->proto == IP_PROTOCOL_UDP)
    vlib_cli_output (vm, " %U %u %U %u %U %u %U %u protcol %U vrf %u",
		     format_ip6_address, &bibe->in_addr,
		     clib_net_to_host_u16 (bibe->in_port),
		     format_ip6_address, &ste->in_r_addr,
		     clib_net_to_host_u16 (ste->r_port),
		     format_ip4_address, &bibe->out_addr,
		     clib_net_to_host_u16 (bibe->out_port),
		     format_ip4_address, &ste->out_r_addr,
		     clib_net_to_host_u16 (ste->r_port),
		     format_snat_protocol,
		     ip_proto_to_snat_proto (bibe->proto), vrf_id);
  else
    vlib_cli_output (vm, " %U %U %U %U protocol %u vrf %u",
		     format_ip6_address, &bibe->in_addr,
		     format_ip6_address, &ste->in_r_addr,
		     format_ip4_address, &bibe->out_addr,
		     format_ip4_address, &ste->out_r_addr,
		     bibe->proto, vrf_id);

  return 0;
}

static clib_error_t *
nat64_show_st_command_fn (vlib_main_t * vm,
			  unformat_input_t * input, vlib_cli_command_t * cmd)
{
  nat64_main_t *nm = &nat64_main;
  unformat_input_t _line_input, *line_input = &_line_input;
  clib_error_t *error = 0;
  u32 proto = ~0;
  u8 p = 255;

  if (nm->is_disabled)
    return clib_error_return (0,
			      "NAT64 disabled, multi thread not supported");

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

  if (unformat (line_input, "%U", unformat_snat_protocol, &proto))
    p = snat_proto_to_ip_proto (proto);
  else if (unformat (line_input, "unknown"))
    p = 0;
  else if (unformat (line_input, "all"))
    ;
  else
    {
      error = clib_error_return (0, "unknown input: '%U'",
				 format_unformat_error, line_input);
      goto done;
    }

  if (p == 255)
    vlib_cli_output (vm, "NAT64 sessions:");
  else
    vlib_cli_output (vm, "NAT64 %U sessions:", format_snat_protocol, proto);
  nat64_db_st_walk (&nm->db, p, nat64_cli_st_walk, vm);

done:
  unformat_free (line_input);

  return error;
}

static clib_error_t *
nat64_add_del_prefix_command_fn (vlib_main_t * vm, unformat_input_t * input,
				 vlib_cli_command_t * cmd)
{
  nat64_main_t *nm = &nat64_main;
  clib_error_t *error = 0;
  unformat_input_t _line_input, *line_input = &_line_input;
  u8 is_add = 1;
  u32 vrf_id = 0;
  ip6_address_t prefix;
  u32 plen = 0;
  int rv;

  if (nm->is_disabled)
    return clib_error_return (0,
			      "NAT64 disabled, multi thread not supported");

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

  while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
    {
      if (unformat
	  (line_input, "%U/%u", unformat_ip6_address, &prefix, &plen))
	;
      else if (unformat (line_input, "tenant-vrf %u", &vrf_id))
	;
      else if (unformat (line_input, "del"))
	is_add = 0;
      else
	{
	  error = clib_error_return (0, "unknown input: '%U'",
				     format_unformat_error, line_input);
	  goto done;
	}
    }

  if (!plen)
    {
      error = clib_error_return (0, "NAT64 prefix must be set.");
      goto done;
    }

  rv = nat64_add_del_prefix (&prefix, (u8) plen, vrf_id, is_add);

  switch (rv)
    {
    case VNET_API_ERROR_NO_SUCH_ENTRY:
      error = clib_error_return (0, "NAT64 prefix not exist.");
      goto done;
    case VNET_API_ERROR_INVALID_VALUE:
      error = clib_error_return (0, "Invalid prefix length.");
      goto done;
    default:
      break;
    }

done:
  unformat_free (line_input);

  return error;
}

static int
nat64_cli_prefix_walk (nat64_prefix_t * p, void *ctx)
{
  vlib_main_t *vm = ctx;

  vlib_cli_output (vm, " %U/%u tenant-vrf %u",
		   format_ip6_address, &p->prefix, p->plen, p->vrf_id);

  return 0;
}

static clib_error_t *
nat64_show_prefix_command_fn (vlib_main_t * vm, unformat_input_t * input,
			      vlib_cli_command_t * cmd)
{
  nat64_main_t *nm = &nat64_main;

  if (nm->is_disabled)
    return clib_error_return (0,
			      "NAT64 disabled, multi thread not supported");

  vlib_cli_output (vm, "NAT64 prefix:");
  nat64_prefix_walk (nat64_cli_prefix_walk, vm);

  return 0;
}

/* *INDENT-OFF* */

/*?
 * @cliexpar
 * @cliexstart{nat64 add pool address}
 * Add/delete NAT64 pool address.
 * To add single NAT64 pool address use:
 *  vpp# nat64 add pool address 10.1.1.10
 * To add NAT64 pool address range use:
 *  vpp# nat64 add pool address 10.1.1.2 - 10.1.1.5
 * To add NAT64 pool address for specific tenant use:
 *  vpp# nat64 add pool address 10.1.1.100 tenant-vrf 100
 * @cliexend
?*/
VLIB_CLI_COMMAND (nat64_add_pool_address_command, static) = {
  .path = "nat64 add pool address",
  .short_help = "nat64 add pool address <ip4-range-start> [- <ip4-range-end>] "
                "[tenant-vrf <vrf-id>] [del]",
  .function = nat64_add_del_pool_addr_command_fn,
};

/*?
 * @cliexpar
 * @cliexstart{show nat64 pool}
 * Show NAT64 pool.
 *  vpp# show nat64 pool
 *  NAT64 pool:
 *   10.1.1.3 tenant VRF: 0
 *   10.1.1.10 tenant VRF: 10
 * @cliexend
?*/
VLIB_CLI_COMMAND (show_nat64_pool_command, static) = {
  .path = "show nat64 pool",
  .short_help = "show nat64 pool",
  .function = nat64_show_pool_command_fn,
};

/*?
 * @cliexpar
 * @cliexstart{set interface nat64}
 * Enable/disable NAT64 feature on the interface.
 * To enable NAT64 feature with local (IPv6) network interface
 * GigabitEthernet0/8/0 and external (IPv4) network interface
 * GigabitEthernet0/a/0 use:
 *  vpp# set interface nat64 in GigabitEthernet0/8/0 out GigabitEthernet0/a/0
 * @cliexend
?*/
VLIB_CLI_COMMAND (set_interface_nat64_command, static) = {
  .path = "set interface nat64",
  .short_help = "set interface nat64 in|out <intfc> [del]",
  .function = nat64_interface_feature_command_fn,
};

/*?
 * @cliexpar
 * @cliexstart{show nat64 interfaces}
 * Show interfaces with NAT64 feature.
 * To show interfaces with NAT64 feature use:
 *  vpp# show nat64 interfaces
 *  NAT64 interfaces:
 *   GigabitEthernet0/8/0 in
 *   GigabitEthernet0/a/0 out
 * @cliexend
?*/
VLIB_CLI_COMMAND (show_nat64_interfaces_command, static) = {
  .path = "show nat64 interfaces",
  .short_help = "show nat64 interfaces",
  .function = nat64_show_interfaces_command_fn,
};

/*?
 * @cliexpar
 * @cliexstart{nat64 add static bib}
 * Add/delete NAT64 static BIB entry.
 * To create NAT64 satatic BIB entry use:
 *  vpp# nat64 add static bib 2001:db8:c000:221:: 1234 10.1.1.3 5678 tcp
 *  vpp# nat64 add static bib 2001:db8:c000:221:: 1234 10.1.1.3 5678 udp vrf 10
 * @cliexend
?*/
VLIB_CLI_COMMAND (nat64_add_del_static_bib_command, static) = {
  .path = "nat64 add static bib",
  .short_help = "nat64 add static bib <ip6-addr> <port> <ip4-addr> <port> "
                "tcp|udp|icmp [vfr <table-id>] [del]",
  .function = nat64_add_del_static_bib_command_fn,
};

/*?
 * @cliexpar
 * @cliexstart{show nat64 bib}
 * Show NAT64 BIB entries.
 * To show NAT64 TCP BIB entries use:
 *  vpp# show nat64 bib tcp
 *  NAT64 tcp BIB:
 *   fd01:1::2 6303 10.0.0.3 62303 tcp vrf 0 dynamic 1 sessions
 *   2001:db8:c000:221:: 1234 10.1.1.3 5678 tcp vrf 0 static 2 sessions
 * To show NAT64 UDP BIB entries use:
 *  vpp# show nat64 bib udp
 *  NAT64 udp BIB:
 *   fd01:1::2 6304 10.0.0.3 10546 udp vrf 0 dynamic 10 sessions
 *   2001:db8:c000:221:: 1234 10.1.1.3 5678 udp vrf 10 static 0 sessions
 * To show NAT64 ICMP BIB entries use:
 *  vpp# show nat64 bib icmp
 *  NAT64 icmp BIB:
 *   fd01:1::2 6305 10.0.0.3 63209 icmp vrf 10 dynamic 1 sessions
 * @cliexend
?*/
VLIB_CLI_COMMAND (show_nat64_bib_command, static) = {
  .path = "show nat64 bib",
  .short_help = "show nat64 bib all|tcp|udp|icmp|unknown",
  .function = nat64_show_bib_command_fn,
};

/*?
 * @cliexpar
 * @cliexstart{set nat64 timeouts}
 * Set NAT64 session timeouts (in seconds).
 * To set NAT64 session timeoutes use use:
 *  vpp# set nat64 timeouts udp 200 icmp 30 tcp-trans 250 tcp-est 7450
 * To reset NAT64 session timeoutes to default values use:
 *  vpp# set nat64 timeouts reset
 * @cliexend
?*/
VLIB_CLI_COMMAND (set_nat64_timeouts_command, static) = {
  .path = "set nat64 timeouts",
  .short_help = "set nat64 timeouts udp <sec> icmp <sec> tcp-trans <sec> "
                "tcp-est <sec> tcp-incoming-syn <sec> | reset",
  .function = nat64_set_timeouts_command_fn,
};

/*?
 * @cliexpar
 * @cliexstart{show nat64 timeoutss}
 * Show NAT64 session timeouts:
 *  vpp# show nat64 timeouts
 *  NAT64 session timeouts:
 *   UDP 300sec
 *   ICMP 60sec
 *   TCP transitory 240sec
 *   TCP established 7440sec
 *   TCP incoming SYN 6sec
 * @cliexend
?*/
VLIB_CLI_COMMAND (show_nat64_timeouts_command, static) = {
  .path = "show nat64 timeouts",
  .short_help = "show nat64 timeouts",
  .function = nat64_show_timeouts_command_fn,
};

/*?
 * @cliexpar
 * @cliexstart{show nat64 session table}
 * Show NAT64 session table.
 * To show NAT64 TCP session table use:
 *  vpp# show nat64 session table tcp
 *  NAT64 tcp session table:
 *   fd01:1::2 6303 64:ff9b::ac10:202 20 10.0.0.3 62303 172.16.2.2 20 tcp vrf 0
 *   fd01:3::2 6303 64:ff9b::ac10:202 20 10.0.10.3 21300 172.16.2.2 20 tcp vrf 10
 * To show NAT64 UDP session table use:
 * #vpp show nat64 session table udp
 * NAT64 udp session table:
 *  fd01:1::2 6304 64:ff9b::ac10:202 20 10.0.0.3 10546 172.16.2.2 20 udp vrf 0
 *  fd01:3::2 6304 64:ff9b::ac10:202 20 10.0.10.3 58627 172.16.2.2 20 udp vrf 10
 *  fd01:1::2 1235 64:ff9b::a00:3 4023 10.0.0.3 24488 10.0.0.3 4023 udp vrf 0
 *  fd01:1::3 23 64:ff9b::a00:3 24488 10.0.0.3 4023 10.0.0.3 24488 udp vrf 0
 * To show NAT64 ICMP session table use:
 * #vpp show nat64 session table icmp
 * NAT64 icmp session table:
 *  fd01:1::2 64:ff9b::ac10:202 6305 10.0.0.3 172.16.2.2 63209 icmp vrf 0
 * @cliexend
?*/
VLIB_CLI_COMMAND (show_nat64_st_command, static) = {
  .path = "show nat64 session table",
  .short_help = "show nat64 session table all|tcp|udp|icmp|unknown",
  .function = nat64_show_st_command_fn,
};

/*?
 * @cliexpar
 * @cliexstart{nat64 add prefix}
 * Set NAT64 prefix for generating IPv6 representations of IPv4 addresses.
 * To set NAT64 global prefix use:
 *  vpp# nat64 add prefix 2001:db8::/32
 * To set NAT64 prefix for specific tenant use:
 *  vpp# nat64 add prefix 2001:db8:122:300::/56 tenant-vrf 10
 * @cliexend
?*/
VLIB_CLI_COMMAND (nat64_add_del_prefix_command, static) = {
  .path = "nat64 add prefix",
  .short_help = "nat64 add prefix <ip6-prefix>/<plen> [tenant-vrf <vrf-id>] "
                "[del]",
  .function = nat64_add_del_prefix_command_fn,
};

/*?
 * @cliexpar
 * @cliexstart{show nat64 prefix}
 * Show NAT64 prefix.
 * To show NAT64 prefix use:
 *  vpp# show nat64 prefix
 *  NAT64 prefix:
 *   2001:db8::/32 tenant-vrf 0
 *   2001:db8:122:300::/56 tenant-vrf 10
 * @cliexend
?*/
VLIB_CLI_COMMAND (show_nat64_prefix_command, static) = {
  .path = "show nat64 prefix",
  .short_help = "show nat64 prefix",
  .function = nat64_show_prefix_command_fn,
};

/* *INDENT-ON* */

/*
 * fd.io coding-style-patch-verification: ON
 *
 * Local Variables:
 * eval: (c-set-style "gnu")
 * End:
 */
span class="n">ip6_address_t * sl) { ip6_sr_header_t *srh; ip6_address_t *addrp, *this_address; u32 header_length = 0; u8 *rs = NULL; header_length = 0; header_length += sizeof (ip6_sr_header_t); header_length += vec_len (sl) * sizeof (ip6_address_t); vec_validate (rs, header_length - 1); srh = (ip6_sr_header_t *) rs; srh->type = ROUTING_HEADER_TYPE_SR; srh->segments_left = vec_len (sl) - 1; srh->first_segment = vec_len (sl) - 1; srh->length = ((sizeof (ip6_sr_header_t) + (vec_len (sl) * sizeof (ip6_address_t))) / 8) - 1; srh->flags = 0x00; srh->reserved = 0x0000; addrp = srh->segments + vec_len (sl) - 1; vec_foreach (this_address, sl) { clib_memcpy (addrp->as_u8, this_address->as_u8, sizeof (ip6_address_t)); addrp--; } return rs; } /*************************** SR LB helper functions **************************/ /** * @brief Creates a Segment List and adds it to an SR policy * * Creates a Segment List and adds it to the SR policy. Notice that the SL are * not necessarily unique. Hence there might be two Segment List within the * same SR Policy with exactly the same segments and same weight. * * @param sr_policy is the SR policy where the SL will be added * @param sl is a vector of IPv6 addresses composing the Segment List * @param weight is the weight of the SegmentList (for load-balancing purposes) * @param is_encap represents the mode (SRH insertion vs Encapsulation) * * @return pointer to the just created segment list */ static inline ip6_sr_sl_t * create_sl (ip6_sr_policy_t * sr_policy, ip6_address_t * sl, u32 weight, u8 is_encap) { ip6_sr_main_t *sm = &sr_main; ip6_sr_sl_t *segment_list; pool_get (sm->sid_lists, segment_list); memset (segment_list, 0, sizeof (*segment_list)); vec_add1 (sr_policy->segments_lists, segment_list - sm->sid_lists); /* Fill in segment list */ segment_list->weight = (weight != (u32) ~ 0 ? weight : SR_SEGMENT_LIST_WEIGHT_DEFAULT); segment_list->segments = vec_dup (sl); if (is_encap) { segment_list->rewrite = compute_rewrite_encaps (sl); segment_list->rewrite_bsid = segment_list->rewrite; } else { segment_list->rewrite = compute_rewrite_insert (sl); segment_list->rewrite_bsid = compute_rewrite_bsid (sl); } /* Create DPO */ dpo_reset (&segment_list->bsid_dpo); dpo_reset (&segment_list->ip6_dpo); dpo_reset (&segment_list->ip4_dpo); if (is_encap) { dpo_set (&segment_list->ip6_dpo, sr_pr_encaps_dpo_type, DPO_PROTO_IP6, segment_list - sm->sid_lists); dpo_set (&segment_list->ip4_dpo, sr_pr_encaps_dpo_type, DPO_PROTO_IP4, segment_list - sm->sid_lists); dpo_set (&segment_list->bsid_dpo, sr_pr_bsid_encaps_dpo_type, DPO_PROTO_IP6, segment_list - sm->sid_lists); } else { dpo_set (&segment_list->ip6_dpo, sr_pr_insert_dpo_type, DPO_PROTO_IP6, segment_list - sm->sid_lists); dpo_set (&segment_list->bsid_dpo, sr_pr_bsid_insert_dpo_type, DPO_PROTO_IP6, segment_list - sm->sid_lists); } return segment_list; } /** * @brief Updates the Load Balancer after an SR Policy change * * @param sr_policy is the modified SR Policy */ static inline void update_lb (ip6_sr_policy_t * sr_policy) { flow_hash_config_t fhc; u32 *sl_index; ip6_sr_sl_t *segment_list; ip6_sr_main_t *sm = &sr_main; load_balance_path_t path; path.path_index = FIB_NODE_INDEX_INVALID; load_balance_path_t *ip4_path_vector = 0; load_balance_path_t *ip6_path_vector = 0; load_balance_path_t *b_path_vector = 0; /* In case LB does not exist, create it */ if (!dpo_id_is_valid (&sr_policy->bsid_dpo)) { fib_prefix_t pfx = { .fp_proto = FIB_PROTOCOL_IP6, .fp_len = 128, .fp_addr = { .ip6 = sr_policy->bsid, } }; /* Add FIB entry for BSID */ fhc = fib_table_get_flow_hash_config (sr_policy->fib_table, FIB_PROTOCOL_IP6); dpo_set (&sr_policy->bsid_dpo, DPO_LOAD_BALANCE, DPO_PROTO_IP6, load_balance_create (0, DPO_PROTO_IP6, fhc)); dpo_set (&sr_policy->ip6_dpo, DPO_LOAD_BALANCE, DPO_PROTO_IP6, load_balance_create (0, DPO_PROTO_IP6, fhc)); /* Update FIB entry's to point to the LB DPO in the main FIB and hidden one */ fib_table_entry_special_dpo_update (fib_table_find (FIB_PROTOCOL_IP6, sr_policy->fib_table), &pfx, FIB_SOURCE_SR, FIB_ENTRY_FLAG_EXCLUSIVE, &sr_policy->bsid_dpo); fib_table_entry_special_dpo_update (sm->fib_table_ip6, &pfx, FIB_SOURCE_SR, FIB_ENTRY_FLAG_EXCLUSIVE, &sr_policy->ip6_dpo); if (sr_policy->is_encap) { dpo_set (&sr_policy->ip4_dpo, DPO_LOAD_BALANCE, DPO_PROTO_IP4, load_balance_create (0, DPO_PROTO_IP4, fhc)); fib_table_entry_special_dpo_update (sm->fib_table_ip4, &pfx, FIB_SOURCE_SR, FIB_ENTRY_FLAG_EXCLUSIVE, &sr_policy->ip4_dpo); } } /* Create the LB path vector */ //path_vector = vec_new(load_balance_path_t, vec_len(sr_policy->segments_lists)); vec_foreach (sl_index, sr_policy->segments_lists) { segment_list = pool_elt_at_index (sm->sid_lists, *sl_index); path.path_dpo = segment_list->bsid_dpo; path.path_weight = segment_list->weight; vec_add1 (b_path_vector, path); path.path_dpo = segment_list->ip6_dpo; vec_add1 (ip6_path_vector, path); if (sr_policy->is_encap) { path.path_dpo = segment_list->ip4_dpo; vec_add1 (ip4_path_vector, path); } } /* Update LB multipath */ load_balance_multipath_update (&sr_policy->bsid_dpo, b_path_vector, LOAD_BALANCE_FLAG_NONE); load_balance_multipath_update (&sr_policy->ip6_dpo, ip6_path_vector, LOAD_BALANCE_FLAG_NONE); if (sr_policy->is_encap) load_balance_multipath_update (&sr_policy->ip4_dpo, ip4_path_vector, LOAD_BALANCE_FLAG_NONE); /* Cleanup */ vec_free (b_path_vector); vec_free (ip6_path_vector); vec_free (ip4_path_vector); } /** * @brief Updates the Replicate DPO after an SR Policy change * * @param sr_policy is the modified SR Policy (type spray) */ static inline void update_replicate (ip6_sr_policy_t * sr_policy) { u32 *sl_index; ip6_sr_sl_t *segment_list; ip6_sr_main_t *sm = &sr_main; load_balance_path_t path; path.path_index = FIB_NODE_INDEX_INVALID; load_balance_path_t *b_path_vector = 0; load_balance_path_t *ip6_path_vector = 0; load_balance_path_t *ip4_path_vector = 0; /* In case LB does not exist, create it */ if (!dpo_id_is_valid (&sr_policy->bsid_dpo)) { dpo_set (&sr_policy->bsid_dpo, DPO_REPLICATE, DPO_PROTO_IP6, replicate_create (0, DPO_PROTO_IP6)); dpo_set (&sr_policy->ip6_dpo, DPO_REPLICATE, DPO_PROTO_IP6, replicate_create (0, DPO_PROTO_IP6)); /* Update FIB entry's DPO to point to SR without LB */ fib_prefix_t pfx = { .fp_proto = FIB_PROTOCOL_IP6, .fp_len = 128, .fp_addr = { .ip6 = sr_policy->bsid, } }; fib_table_entry_special_dpo_update (fib_table_find (FIB_PROTOCOL_IP6, sr_policy->fib_table), &pfx, FIB_SOURCE_SR, FIB_ENTRY_FLAG_EXCLUSIVE, &sr_policy->bsid_dpo); fib_table_entry_special_dpo_update (sm->fib_table_ip6, &pfx, FIB_SOURCE_SR, FIB_ENTRY_FLAG_EXCLUSIVE, &sr_policy->ip6_dpo); if (sr_policy->is_encap) { dpo_set (&sr_policy->ip4_dpo, DPO_REPLICATE, DPO_PROTO_IP4, replicate_create (0, DPO_PROTO_IP4)); fib_table_entry_special_dpo_update (sm->fib_table_ip4, &pfx, FIB_SOURCE_SR, FIB_ENTRY_FLAG_EXCLUSIVE, &sr_policy->ip4_dpo); } } /* Create the replicate path vector */ path.path_weight = 1; vec_foreach (sl_index, sr_policy->segments_lists) { segment_list = pool_elt_at_index (sm->sid_lists, *sl_index); path.path_dpo = segment_list->bsid_dpo; vec_add1 (b_path_vector, path); path.path_dpo = segment_list->ip6_dpo; vec_add1 (ip6_path_vector, path); if (sr_policy->is_encap) { path.path_dpo = segment_list->ip4_dpo; vec_add1 (ip4_path_vector, path); } } /* Update replicate multipath */ replicate_multipath_update (&sr_policy->bsid_dpo, b_path_vector); replicate_multipath_update (&sr_policy->ip6_dpo, ip6_path_vector); if (sr_policy->is_encap) replicate_multipath_update (&sr_policy->ip4_dpo, ip4_path_vector); } /******************************* SR rewrite API *******************************/ /* Three functions for handling sr policies: * -> sr_policy_add * -> sr_policy_del * -> sr_policy_mod * All of them are API. CLI function on sr_policy_command_fn */ /** * @brief Create a new SR policy * * @param bsid is the bindingSID of the SR Policy * @param segments is a vector of IPv6 address composing the segment list * @param weight is the weight of the sid list. optional. * @param behavior is the behavior of the SR policy. (default//spray) * @param fib_table is the VRF where to install the FIB entry for the BSID * @param is_encap (bool) whether SR policy should behave as Encap/SRH Insertion * * @return 0 if correct, else error */ int sr_policy_add (ip6_address_t * bsid, ip6_address_t * segments, u32 weight, u8 behavior, u32 fib_table, u8 is_encap) { ip6_sr_main_t *sm = &sr_main; ip6_sr_policy_t *sr_policy = 0; uword *p; /* Search for existing keys (BSID) */ p = mhash_get (&sm->sr_policies_index_hash, bsid); if (p) { /* Add SR policy that already exists; complain */ return -12; } /* Search collision in FIB entries */ /* Explanation: It might be possible that some other entity has already * created a route for the BSID. This in theory is impossible, but in * practise we could see it. Assert it and scream if needed */ fib_prefix_t pfx = { .fp_proto = FIB_PROTOCOL_IP6, .fp_len = 128, .fp_addr = { .ip6 = *bsid, } }; /* Lookup the FIB index associated to the table selected */ u32 fib_index = fib_table_find (FIB_PROTOCOL_IP6, (fib_table != (u32) ~ 0 ? fib_table : 0)); if (fib_index == ~0) return -13; /* Lookup whether there exists an entry for the BSID */ fib_node_index_t fei = fib_table_lookup_exact_match (fib_index, &pfx); if (FIB_NODE_INDEX_INVALID != fei) return -12; //There is an entry for such lookup /* Add an SR policy object */ pool_get (sm->sr_policies, sr_policy); memset (sr_policy, 0, sizeof (*sr_policy)); clib_memcpy (&sr_policy->bsid, bsid, sizeof (ip6_address_t)); sr_policy->type = behavior; sr_policy->fib_table = (fib_table != (u32) ~ 0 ? fib_table : 0); //Is default FIB 0 ? sr_policy->is_encap = is_encap; /* Copy the key */ mhash_set (&sm->sr_policies_index_hash, bsid, sr_policy - sm->sr_policies, NULL); /* Create a segment list and add the index to the SR policy */ create_sl (sr_policy, segments, weight, is_encap); /* If FIB doesnt exist, create them */ if (sm->fib_table_ip6 == (u32) ~ 0) { sm->fib_table_ip6 = fib_table_create_and_lock (FIB_PROTOCOL_IP6, FIB_SOURCE_SR, "SRv6 steering of IP6 prefixes through BSIDs"); sm->fib_table_ip4 = fib_table_create_and_lock (FIB_PROTOCOL_IP6, FIB_SOURCE_SR, "SRv6 steering of IP4 prefixes through BSIDs"); } /* Create IPv6 FIB for the BindingSID attached to the DPO of the only SL */ if (sr_policy->type == SR_POLICY_TYPE_DEFAULT) update_lb (sr_policy); else if (sr_policy->type == SR_POLICY_TYPE_SPRAY) update_replicate (sr_policy); return 0; } /** * @brief Delete a SR policy * * @param bsid is the bindingSID of the SR Policy * @param index is the index of the SR policy * * @return 0 if correct, else error */ int sr_policy_del (ip6_address_t * bsid, u32 index) { ip6_sr_main_t *sm = &sr_main; ip6_sr_policy_t *sr_policy = 0; ip6_sr_sl_t *segment_list; u32 *sl_index; uword *p; if (bsid) { p = mhash_get (&sm->sr_policies_index_hash, bsid); if (p) sr_policy = pool_elt_at_index (sm->sr_policies, p[0]); else return -1; } else { sr_policy = pool_elt_at_index (sm->sr_policies, index); if (!sr_policy) return -1; } /* Remove BindingSID FIB entry */ fib_prefix_t pfx = { .fp_proto = FIB_PROTOCOL_IP6, .fp_len = 128, .fp_addr = { .ip6 = sr_policy->bsid, } , }; fib_table_entry_special_remove (fib_table_find (FIB_PROTOCOL_IP6, sr_policy->fib_table), &pfx, FIB_SOURCE_SR); fib_table_entry_special_remove (sm->fib_table_ip6, &pfx, FIB_SOURCE_SR); if (sr_policy->is_encap) fib_table_entry_special_remove (sm->fib_table_ip4, &pfx, FIB_SOURCE_SR); if (dpo_id_is_valid (&sr_policy->bsid_dpo)) { dpo_reset (&sr_policy->bsid_dpo); dpo_reset (&sr_policy->ip4_dpo); dpo_reset (&sr_policy->ip6_dpo); } /* Clean SID Lists */ vec_foreach (sl_index, sr_policy->segments_lists) { segment_list = pool_elt_at_index (sm->sid_lists, *sl_index); vec_free (segment_list->segments); vec_free (segment_list->rewrite); if (!sr_policy->is_encap) vec_free (segment_list->rewrite_bsid); pool_put_index (sm->sid_lists, *sl_index); } /* Remove SR policy entry */ mhash_unset (&sm->sr_policies_index_hash, &sr_policy->bsid, NULL); pool_put (sm->sr_policies, sr_policy); /* If FIB empty unlock it */ if (!pool_elts (sm->sr_policies) && !pool_elts (sm->steer_policies)) { fib_table_unlock (sm->fib_table_ip6, FIB_PROTOCOL_IP6, FIB_SOURCE_SR); fib_table_unlock (sm->fib_table_ip4, FIB_PROTOCOL_IP6, FIB_SOURCE_SR); sm->fib_table_ip6 = (u32) ~ 0; sm->fib_table_ip4 = (u32) ~ 0; } return 0; } /** * @brief Modify an existing SR policy * * The possible modifications are adding a new Segment List, modifying an * existing Segment List (modify the weight only) and delete a given * Segment List from the SR Policy. * * @param bsid is the bindingSID of the SR Policy * @param index is the index of the SR policy * @param fib_table is the VRF where to install the FIB entry for the BSID * @param operation is the operation to perform (among the top ones) * @param segments is a vector of IPv6 address composing the segment list * @param sl_index is the index of the Segment List to modify/delete * @param weight is the weight of the sid list. optional. * @param is_encap Mode. Encapsulation or SRH insertion. * * @return 0 if correct, else error */ int sr_policy_mod (ip6_address_t * bsid, u32 index, u32 fib_table, u8 operation, ip6_address_t * segments, u32 sl_index, u32 weight) { ip6_sr_main_t *sm = &sr_main; ip6_sr_policy_t *sr_policy = 0; ip6_sr_sl_t *segment_list; u32 *sl_index_iterate; uword *p; if (bsid) { p = mhash_get (&sm->sr_policies_index_hash, bsid); if (p) sr_policy = pool_elt_at_index (sm->sr_policies, p[0]); else return -1; } else { sr_policy = pool_elt_at_index (sm->sr_policies, index); if (!sr_policy) return -1; } if (operation == 1) /* Add SR List to an existing SR policy */ { /* Create the new SL */ segment_list = create_sl (sr_policy, segments, weight, sr_policy->is_encap); /* Create a new LB DPO */ if (sr_policy->type == SR_POLICY_TYPE_DEFAULT) update_lb (sr_policy); else if (sr_policy->type == SR_POLICY_TYPE_SPRAY) update_replicate (sr_policy); } else if (operation == 2) /* Delete SR List from an existing SR policy */ { /* Check that currently there are more than one SID list */ if (vec_len (sr_policy->segments_lists) == 1) return -21; /* Check that the SR list does exist and is assigned to the sr policy */ vec_foreach (sl_index_iterate, sr_policy->segments_lists) if (*sl_index_iterate == sl_index) break; if (*sl_index_iterate != sl_index) return -22; /* Remove the lucky SR list that is being kicked out */ segment_list = pool_elt_at_index (sm->sid_lists, sl_index); vec_free (segment_list->segments); vec_free (segment_list->rewrite); if (!sr_policy->is_encap) vec_free (segment_list->rewrite_bsid); pool_put_index (sm->sid_lists, sl_index); vec_del1 (sr_policy->segments_lists, sl_index_iterate - sr_policy->segments_lists); /* Create a new LB DPO */ if (sr_policy->type == SR_POLICY_TYPE_DEFAULT) update_lb (sr_policy); else if (sr_policy->type == SR_POLICY_TYPE_SPRAY) update_replicate (sr_policy); } else if (operation == 3) /* Modify the weight of an existing SR List */ { /* Find the corresponding SL */ vec_foreach (sl_index_iterate, sr_policy->segments_lists) if (*sl_index_iterate == sl_index) break; if (*sl_index_iterate != sl_index) return -32; /* Change the weight */ segment_list = pool_elt_at_index (sm->sid_lists, sl_index); segment_list->weight = weight; /* Update LB */ if (sr_policy->type == SR_POLICY_TYPE_DEFAULT) update_lb (sr_policy); } else /* Incorrect op. */ return -1; return 0; } /** * @brief CLI for 'sr policies' command family */ static clib_error_t * sr_policy_command_fn (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { int rv = -1; char is_del = 0, is_add = 0, is_mod = 0; char policy_set = 0; ip6_address_t bsid, next_address; u32 sr_policy_index = (u32) ~ 0, sl_index = (u32) ~ 0; u32 weight = (u32) ~ 0, fib_table = (u32) ~ 0; ip6_address_t *segments = 0, *this_seg; u8 operation = 0; char is_encap = 1; char is_spray = 0; while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) { if (!is_add && !is_mod && !is_del && unformat (input, "add")) is_add = 1; else if (!is_add && !is_mod && !is_del && unformat (input, "del")) is_del = 1; else if (!is_add && !is_mod && !is_del && unformat (input, "mod")) is_mod = 1; else if (!policy_set && unformat (input, "bsid %U", unformat_ip6_address, &bsid)) policy_set = 1; else if (!is_add && !policy_set && unformat (input, "index %d", &sr_policy_index)) policy_set = 1; else if (unformat (input, "weight %d", &weight)); else if (unformat (input, "next %U", unformat_ip6_address, &next_address)) { vec_add2 (segments, this_seg, 1); clib_memcpy (this_seg->as_u8, next_address.as_u8, sizeof (*this_seg)); } else if (unformat (input, "add sl")) operation = 1; else if (unformat (input, "del sl index %d", &sl_index)) operation = 2; else if (unformat (input, "mod sl index %d", &sl_index)) operation = 3; else if (fib_table == (u32) ~ 0 && unformat (input, "fib-table %d", &fib_table)); else if (unformat (input, "encap")) is_encap = 1; else if (unformat (input, "insert")) is_encap = 0; else if (unformat (input, "spray")) is_spray = 1; else break; } if (!is_add && !is_mod && !is_del) return clib_error_return (0, "Incorrect CLI"); if (!policy_set) return clib_error_return (0, "No SR policy BSID or index specified"); if (is_add) { if (vec_len (segments) == 0) return clib_error_return (0, "No Segment List specified"); rv = sr_policy_add (&bsid, segments, weight, (is_spray ? SR_POLICY_TYPE_SPRAY : SR_POLICY_TYPE_DEFAULT), fib_table, is_encap); } else if (is_del) rv = sr_policy_del ((sr_policy_index != (u32) ~ 0 ? NULL : &bsid), sr_policy_index); else if (is_mod) { if (!operation) return clib_error_return (0, "No SL modification specified"); if (operation != 1 && sl_index == (u32) ~ 0) return clib_error_return (0, "No Segment List index specified"); if (operation == 1 && vec_len (segments) == 0) return clib_error_return (0, "No Segment List specified"); if (operation == 3 && weight == (u32) ~ 0) return clib_error_return (0, "No new weight for the SL specified"); rv = sr_policy_mod ((sr_policy_index != (u32) ~ 0 ? NULL : &bsid), sr_policy_index, fib_table, operation, segments, sl_index, weight); } switch (rv) { case 0: break; case 1: return 0; case -12: return clib_error_return (0, "There is already a FIB entry for the BindingSID address.\n" "The SR policy could not be created."); case -13: return clib_error_return (0, "The specified FIB table does not exist."); case -21: return clib_error_return (0, "The selected SR policy only contains ONE segment list. " "Please remove the SR policy instead"); case -22: return clib_error_return (0, "Could not delete the segment list. " "It is not associated with that SR policy."); case -32: return clib_error_return (0, "Could not modify the segment list. " "The given SL is not associated with such SR policy."); default: return clib_error_return (0, "BUG: sr policy returns %d", rv); } return 0; } /* *INDENT-OFF* */ VLIB_CLI_COMMAND (sr_policy_command, static) = { .path = "sr policy", .short_help = "sr policy [add||del||mod] [bsid 2001::1||index 5] " "next A:: next B:: next C:: (weight 1) (fib-table 2) (encap|insert)", .long_help = "Manipulation of SR policies.\n" "A Segment Routing policy may contain several SID lists. Each SID list has\n" "an associated weight (default 1), which will result in wECMP (uECMP).\n" "Segment Routing policies might be of type encapsulation or srh insertion\n" "Each SR policy will be associated with a unique BindingSID.\n" "A BindingSID is a locally allocated SegmentID. For every packet that arrives\n" "with IPv6_DA:BSID such traffic will be steered into the SR policy.\n" "The add command will create a SR policy with its first segment list (sl)\n" "The mod command allows you to add, remove, or modify the existing segment lists\n" "within an SR policy.\n" "The del command allows you to delete a SR policy along with all its associated\n" "SID lists.\n", .function = sr_policy_command_fn, }; /* *INDENT-ON* */ /** * @brief CLI to display onscreen all the SR policies */ static clib_error_t * show_sr_policies_command_fn (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { ip6_sr_main_t *sm = &sr_main; u32 *sl_index; ip6_sr_sl_t *segment_list = 0; ip6_sr_policy_t *sr_policy = 0; ip6_sr_policy_t **vec_policies = 0; ip6_address_t *addr; u8 *s; int i = 0; vlib_cli_output (vm, "SR policies:"); /* *INDENT-OFF* */ pool_foreach (sr_policy, sm->sr_policies, {vec_add1 (vec_policies, sr_policy); } ); /* *INDENT-ON* */ vec_foreach_index (i, vec_policies) { sr_policy = vec_policies[i]; vlib_cli_output (vm, "[%u].-\tBSID: %U", (u32) (sr_policy - sm->sr_policies), format_ip6_address, &sr_policy->bsid); vlib_cli_output (vm, "\tBehavior: %s", (sr_policy->is_encap ? "Encapsulation" : "SRH insertion")); vlib_cli_output (vm, "\tType: %s", (sr_policy->type == SR_POLICY_TYPE_DEFAULT ? "Default" : "Spray")); vlib_cli_output (vm, "\tFIB table: %u", (sr_policy->fib_table != (u32) ~ 0 ? sr_policy->fib_table : 0)); vlib_cli_output (vm, "\tSegment Lists:"); vec_foreach (sl_index, sr_policy->segments_lists) { s = NULL; s = format (s, "\t[%u].- ", *sl_index); segment_list = pool_elt_at_index (sm->sid_lists, *sl_index); s = format (s, "< "); vec_foreach (addr, segment_list->segments) { s = format (s, "%U, ", format_ip6_address, addr); } s = format (s, "\b\b > "); s = format (s, "weight: %u", segment_list->weight); vlib_cli_output (vm, " %s", s); } vlib_cli_output (vm, "-----------"); } return 0; } /* *INDENT-OFF* */ VLIB_CLI_COMMAND (show_sr_policies_command, static) = { .path = "show sr policies", .short_help = "show sr policies", .function = show_sr_policies_command_fn, }; /* *INDENT-ON* */ /*************************** SR rewrite graph node ****************************/ /** * @brief Trace for the SR Policy Rewrite graph node */ static u8 * format_sr_policy_rewrite_trace (u8 * s, va_list * args) { //TODO CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *); CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *); sr_policy_rewrite_trace_t *t = va_arg (*args, sr_policy_rewrite_trace_t *); s = format (s, "SR-policy-rewrite: src %U dst %U", format_ip6_address, &t->src, format_ip6_address, &t->dst); return s; } /** * @brief IPv6 encapsulation processing as per RFC2473 */ static_always_inline void encaps_processing_v6 (vlib_node_runtime_t * node, vlib_buffer_t * b0, ip6_header_t * ip0, ip6_header_t * ip0_encap) { u32 new_l0; ip0_encap->hop_limit -= 1; new_l0 = ip0->payload_length + sizeof (ip6_header_t) + clib_net_to_host_u16 (ip0_encap->payload_length); ip0->payload_length = clib_host_to_net_u16 (new_l0); ip0->ip_version_traffic_class_and_flow_label = ip0_encap->ip_version_traffic_class_and_flow_label; } /** * @brief Graph node for applying a SR policy into an IPv6 packet. Encapsulation */ static uword sr_policy_rewrite_encaps (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * from_frame) { ip6_sr_main_t *sm = &sr_main; u32 n_left_from, next_index, *from, *to_next; from = vlib_frame_vector_args (from_frame); n_left_from = from_frame->n_vectors; next_index = node->cached_next_index; int encap_pkts = 0, bsid_pkts = 0; while (n_left_from > 0) { u32 n_left_to_next; vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); /* Quad - Loop */ while (n_left_from >= 8 && n_left_to_next >= 4) { u32 bi0, bi1, bi2, bi3; vlib_buffer_t *b0, *b1, *b2, *b3; u32 next0, next1, next2, next3; next0 = next1 = next2 = next3 = SR_POLICY_REWRITE_NEXT_IP6_LOOKUP; ip6_header_t *ip0, *ip1, *ip2, *ip3; ip6_header_t *ip0_encap, *ip1_encap, *ip2_encap, *ip3_encap; ip6_sr_sl_t *sl0, *sl1, *sl2, *sl3; /* Prefetch next iteration. */ { vlib_buffer_t *p4, *p5, *p6, *p7; p4 = vlib_get_buffer (vm, from[4]); p5 = vlib_get_buffer (vm, from[5]); p6 = vlib_get_buffer (vm, from[6]); p7 = vlib_get_buffer (vm, from[7]); /* Prefetch the buffer header and packet for the N+2 loop iteration */ vlib_prefetch_buffer_header (p4, LOAD); vlib_prefetch_buffer_header (p5, LOAD); vlib_prefetch_buffer_header (p6, LOAD); vlib_prefetch_buffer_header (p7, LOAD); CLIB_PREFETCH (p4->data, CLIB_CACHE_LINE_BYTES, STORE); CLIB_PREFETCH (p5->data, CLIB_CACHE_LINE_BYTES, STORE); CLIB_PREFETCH (p6->data, CLIB_CACHE_LINE_BYTES, STORE); CLIB_PREFETCH (p7->data, CLIB_CACHE_LINE_BYTES, STORE); } to_next[0] = bi0 = from[0]; to_next[1] = bi1 = from[1]; to_next[2] = bi2 = from[2]; to_next[3] = bi3 = from[3]; from += 4; to_next += 4; n_left_from -= 4; n_left_to_next -= 4; b0 = vlib_get_buffer (vm, bi0); b1 = vlib_get_buffer (vm, bi1); b2 = vlib_get_buffer (vm, bi2); b3 = vlib_get_buffer (vm, bi3); sl0 = pool_elt_at_index (sm->sid_lists, vnet_buffer (b0)->ip.adj_index[VLIB_TX]); sl1 = pool_elt_at_index (sm->sid_lists, vnet_buffer (b1)->ip.adj_index[VLIB_TX]); sl2 = pool_elt_at_index (sm->sid_lists, vnet_buffer (b2)->ip.adj_index[VLIB_TX]); sl3 = pool_elt_at_index (sm->sid_lists, vnet_buffer (b3)->ip.adj_index[VLIB_TX]); ASSERT (b0->current_data + VLIB_BUFFER_PRE_DATA_SIZE >= vec_len (sl0->rewrite)); ASSERT (b1->current_data + VLIB_BUFFER_PRE_DATA_SIZE >= vec_len (sl1->rewrite)); ASSERT (b2->current_data + VLIB_BUFFER_PRE_DATA_SIZE >= vec_len (sl2->rewrite)); ASSERT (b3->current_data + VLIB_BUFFER_PRE_DATA_SIZE >= vec_len (sl3->rewrite)); ip0_encap = vlib_buffer_get_current (b0); ip1_encap = vlib_buffer_get_current (b1); ip2_encap = vlib_buffer_get_current (b2); ip3_encap = vlib_buffer_get_current (b3); clib_memcpy (((u8 *) ip0_encap) - vec_len (sl0->rewrite), sl0->rewrite, vec_len (sl0->rewrite)); clib_memcpy (((u8 *) ip1_encap) - vec_len (sl1->rewrite), sl1->rewrite, vec_len (sl1->rewrite)); clib_memcpy (((u8 *) ip2_encap) - vec_len (sl2->rewrite), sl2->rewrite, vec_len (sl2->rewrite)); clib_memcpy (((u8 *) ip3_encap) - vec_len (sl3->rewrite), sl3->rewrite, vec_len (sl3->rewrite)); vlib_buffer_advance (b0, -(word) vec_len (sl0->rewrite)); vlib_buffer_advance (b1, -(word) vec_len (sl1->rewrite)); vlib_buffer_advance (b2, -(word) vec_len (sl2->rewrite)); vlib_buffer_advance (b3, -(word) vec_len (sl3->rewrite)); ip0 = vlib_buffer_get_current (b0); ip1 = vlib_buffer_get_current (b1); ip2 = vlib_buffer_get_current (b2); ip3 = vlib_buffer_get_current (b3); encaps_processing_v6 (node, b0, ip0, ip0_encap); encaps_processing_v6 (node, b1, ip1, ip1_encap); encaps_processing_v6 (node, b2, ip2, ip2_encap); encaps_processing_v6 (node, b3, ip3, ip3_encap); if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE))) { if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) { sr_policy_rewrite_trace_t *tr = vlib_add_trace (vm, node, b0, sizeof (*tr)); clib_memcpy (tr->src.as_u8, ip0->src_address.as_u8, sizeof (tr->src.as_u8)); clib_memcpy (tr->dst.as_u8, ip0->dst_address.as_u8, sizeof (tr->dst.as_u8)); } if (PREDICT_FALSE (b1->flags & VLIB_BUFFER_IS_TRACED)) { sr_policy_rewrite_trace_t *tr = vlib_add_trace (vm, node, b1, sizeof (*tr)); clib_memcpy (tr->src.as_u8, ip1->src_address.as_u8, sizeof (tr->src.as_u8)); clib_memcpy (tr->dst.as_u8, ip1->dst_address.as_u8, sizeof (tr->dst.as_u8)); } if (PREDICT_FALSE (b2->flags & VLIB_BUFFER_IS_TRACED)) { sr_policy_rewrite_trace_t *tr = vlib_add_trace (vm, node, b2, sizeof (*tr)); clib_memcpy (tr->src.as_u8, ip2->src_address.as_u8, sizeof (tr->src.as_u8)); clib_memcpy (tr->dst.as_u8, ip2->dst_address.as_u8, sizeof (tr->dst.as_u8)); } if (PREDICT_FALSE (b3->flags & VLIB_BUFFER_IS_TRACED)) { sr_policy_rewrite_trace_t *tr = vlib_add_trace (vm, node, b3, sizeof (*tr)); clib_memcpy (tr->src.as_u8, ip3->src_address.as_u8, sizeof (tr->src.as_u8)); clib_memcpy (tr->dst.as_u8, ip3->dst_address.as_u8, sizeof (tr->dst.as_u8)); } } encap_pkts += 4; vlib_validate_buffer_enqueue_x4 (vm, node, next_index, to_next, n_left_to_next, bi0, bi1, bi2, bi3, next0, next1, next2, next3); } /* Single loop for potentially the last three packets */ while (n_left_from > 0 && n_left_to_next > 0) { u32 bi0; vlib_buffer_t *b0; ip6_header_t *ip0 = 0, *ip0_encap = 0; ip6_sr_sl_t *sl0; u32 next0 = SR_POLICY_REWRITE_NEXT_IP6_LOOKUP; bi0 = from[0]; to_next[0] = bi0; from += 1; to_next += 1; n_left_from -= 1; n_left_to_next -= 1; b0 = vlib_get_buffer (vm, bi0); sl0 = pool_elt_at_index (sm->sid_lists, vnet_buffer (b0)->ip.adj_index[VLIB_TX]); ASSERT (b0->current_data + VLIB_BUFFER_PRE_DATA_SIZE >= vec_len (sl0->rewrite)); ip0_encap = vlib_buffer_get_current (b0); clib_memcpy (((u8 *) ip0_encap) - vec_len (sl0->rewrite), sl0->rewrite, vec_len (sl0->rewrite)); vlib_buffer_advance (b0, -(word) vec_len (sl0->rewrite)); ip0 = vlib_buffer_get_current (b0); encaps_processing_v6 (node, b0, ip0, ip0_encap); if (PREDICT_FALSE (node->flags & VLIB_NODE_FLAG_TRACE) && PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) { sr_policy_rewrite_trace_t *tr = vlib_add_trace (vm, node, b0, sizeof (*tr)); clib_memcpy (tr->src.as_u8, ip0->src_address.as_u8, sizeof (tr->src.as_u8)); clib_memcpy (tr->dst.as_u8, ip0->dst_address.as_u8, sizeof (tr->dst.as_u8)); } encap_pkts++; vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next, n_left_to_next, bi0, next0); } vlib_put_next_frame (vm, node, next_index, n_left_to_next); } /* Update counters */ vlib_node_increment_counter (vm, sr_policy_rewrite_encaps_node.index, SR_POLICY_REWRITE_ERROR_COUNTER_TOTAL, encap_pkts); vlib_node_increment_counter (vm, sr_policy_rewrite_encaps_node.index, SR_POLICY_REWRITE_ERROR_COUNTER_BSID, bsid_pkts); return from_frame->n_vectors; } /* *INDENT-OFF* */ VLIB_REGISTER_NODE (sr_policy_rewrite_encaps_node) = { .function = sr_policy_rewrite_encaps, .name = "sr-pl-rewrite-encaps", .vector_size = sizeof (u32), .format_trace = format_sr_policy_rewrite_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = SR_POLICY_REWRITE_N_ERROR, .error_strings = sr_policy_rewrite_error_strings, .n_next_nodes = SR_POLICY_REWRITE_N_NEXT, .next_nodes = { #define _(s,n) [SR_POLICY_REWRITE_NEXT_##s] = n, foreach_sr_policy_rewrite_next #undef _ }, }; /* *INDENT-ON* */ /** * @brief IPv4 encapsulation processing as per RFC2473 */ static_always_inline void encaps_processing_v4 (vlib_node_runtime_t * node, vlib_buffer_t * b0, ip6_header_t * ip0, ip4_header_t * ip0_encap) { u32 new_l0; ip6_sr_header_t *sr0; u32 checksum0; /* Inner IPv4: Decrement TTL & update checksum */ ip0_encap->ttl -= 1; checksum0 = ip0_encap->checksum + clib_host_to_net_u16 (0x0100); checksum0 += checksum0 >= 0xffff; ip0_encap->checksum = checksum0; /* Outer IPv6: Update length, FL, proto */ new_l0 = ip0->payload_length + clib_net_to_host_u16 (ip0_encap->length); ip0->payload_length = clib_host_to_net_u16 (new_l0); ip0->ip_version_traffic_class_and_flow_label = clib_host_to_net_u32 (0 | ((6 & 0xF) << 28) | ((ip0_encap->tos & 0xFF) << 20)); sr0 = (void *) (ip0 + 1); sr0->protocol = IP_PROTOCOL_IP_IN_IP; } /** * @brief Graph node for applying a SR policy into an IPv4 packet. Encapsulation */ static uword sr_policy_rewrite_encaps_v4 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * from_frame) { ip6_sr_main_t *sm = &sr_main; u32 n_left_from, next_index, *from, *to_next; from = vlib_frame_vector_args (from_frame); n_left_from = from_frame->n_vectors; next_index = node->cached_next_index; int encap_pkts = 0, bsid_pkts = 0; while (n_left_from > 0) { u32 n_left_to_next; vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); /* Quad - Loop */ while (n_left_from >= 8 && n_left_to_next >= 4) { u32 bi0, bi1, bi2, bi3; vlib_buffer_t *b0, *b1, *b2, *b3; u32 next0, next1, next2, next3; next0 = next1 = next2 = next3 = SR_POLICY_REWRITE_NEXT_IP6_LOOKUP; ip6_header_t *ip0, *ip1, *ip2, *ip3; ip4_header_t *ip0_encap, *ip1_encap, *ip2_encap, *ip3_encap; ip6_sr_sl_t *sl0, *sl1, *sl2, *sl3; /* Prefetch next iteration. */ { vlib_buffer_t *p4, *p5, *p6, *p7; p4 = vlib_get_buffer (vm, from[4]); p5 = vlib_get_buffer (vm, from[5]); p6 = vlib_get_buffer (vm, from[6]); p7 = vlib_get_buffer (vm, from[7]); /* Prefetch the buffer header and packet for the N+2 loop iteration */ vlib_prefetch_buffer_header (p4, LOAD); vlib_prefetch_buffer_header (p5, LOAD); vlib_prefetch_buffer_header (p6, LOAD); vlib_prefetch_buffer_header (p7, LOAD); CLIB_PREFETCH (p4->data, CLIB_CACHE_LINE_BYTES, STORE); CLIB_PREFETCH (p5->data, CLIB_CACHE_LINE_BYTES, STORE); CLIB_PREFETCH (p6->data, CLIB_CACHE_LINE_BYTES, STORE); CLIB_PREFETCH (p7->data, CLIB_CACHE_LINE_BYTES, STORE); } to_next[0] = bi0 = from[0]; to_next[1] = bi1 = from[1]; to_next[2] = bi2 = from[2]; to_next[3] = bi3 = from[3]; from += 4; to_next += 4; n_left_from -= 4; n_left_to_next -= 4; b0 = vlib_get_buffer (vm, bi0); b1 = vlib_get_buffer (vm, bi1); b2 = vlib_get_buffer (vm, bi2); b3 = vlib_get_buffer (vm, bi3); sl0 = pool_elt_at_index (sm->sid_lists, vnet_buffer (b0)->ip.adj_index[VLIB_TX]); sl1 = pool_elt_at_index (sm->sid_lists, vnet_buffer (b1)->ip.adj_index[VLIB_TX]); sl2 = pool_elt_at_index (sm->sid_lists, vnet_buffer (b2)->ip.adj_index[VLIB_TX]); sl3 = pool_elt_at_index (sm->sid_lists, vnet_buffer (b3)->ip.adj_index[VLIB_TX]); ASSERT (b0->current_data + VLIB_BUFFER_PRE_DATA_SIZE >= vec_len (sl0->rewrite)); ASSERT (b1->current_data + VLIB_BUFFER_PRE_DATA_SIZE >= vec_len (sl1->rewrite)); ASSERT (b2->current_data + VLIB_BUFFER_PRE_DATA_SIZE >= vec_len (sl2->rewrite)); ASSERT (b3->current_data + VLIB_BUFFER_PRE_DATA_SIZE >= vec_len (sl3->rewrite)); ip0_encap = vlib_buffer_get_current (b0); ip1_encap = vlib_buffer_get_current (b1); ip2_encap = vlib_buffer_get_current (b2); ip3_encap = vlib_buffer_get_current (b3); clib_memcpy (((u8 *) ip0_encap) - vec_len (sl0->rewrite), sl0->rewrite, vec_len (sl0->rewrite)); clib_memcpy (((u8 *) ip1_encap) - vec_len (sl1->rewrite), sl1->rewrite, vec_len (sl1->rewrite)); clib_memcpy (((u8 *) ip2_encap) - vec_len (sl2->rewrite), sl2->rewrite, vec_len (sl2->rewrite)); clib_memcpy (((u8 *) ip3_encap) - vec_len (sl3->rewrite), sl3->rewrite, vec_len (sl3->rewrite)); vlib_buffer_advance (b0, -(word) vec_len (sl0->rewrite)); vlib_buffer_advance (b1, -(word) vec_len (sl1->rewrite)); vlib_buffer_advance (b2, -(word) vec_len (sl2->rewrite)); vlib_buffer_advance (b3, -(word) vec_len (sl3->rewrite)); ip0 = vlib_buffer_get_current (b0); ip1 = vlib_buffer_get_current (b1); ip2 = vlib_buffer_get_current (b2); ip3 = vlib_buffer_get_current (b3); encaps_processing_v4 (node, b0, ip0, ip0_encap); encaps_processing_v4 (node, b1, ip1, ip1_encap); encaps_processing_v4 (node, b2, ip2, ip2_encap); encaps_processing_v4 (node, b3, ip3, ip3_encap); if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE))) { if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) { sr_policy_rewrite_trace_t *tr = vlib_add_trace (vm, node, b0, sizeof (*tr)); clib_memcpy (tr->src.as_u8, ip0->src_address.as_u8, sizeof (tr->src.as_u8)); clib_memcpy (tr->dst.as_u8, ip0->dst_address.as_u8, sizeof (tr->dst.as_u8)); } if (PREDICT_FALSE (b1->flags & VLIB_BUFFER_IS_TRACED)) { sr_policy_rewrite_trace_t *tr = vlib_add_trace (vm, node, b1, sizeof (*tr)); clib_memcpy (tr->src.as_u8, ip1->src_address.as_u8, sizeof (tr->src.as_u8)); clib_memcpy (tr->dst.as_u8, ip1->dst_address.as_u8, sizeof (tr->dst.as_u8)); } if (PREDICT_FALSE (b2->flags & VLIB_BUFFER_IS_TRACED)) { sr_policy_rewrite_trace_t *tr = vlib_add_trace (vm, node, b2, sizeof (*tr)); clib_memcpy (tr->src.as_u8, ip2->src_address.as_u8, sizeof (tr->src.as_u8)); clib_memcpy (tr->dst.as_u8, ip2->dst_address.as_u8, sizeof (tr->dst.as_u8)); } if (PREDICT_FALSE (b3->flags & VLIB_BUFFER_IS_TRACED)) { sr_policy_rewrite_trace_t *tr = vlib_add_trace (vm, node, b3, sizeof (*tr)); clib_memcpy (tr->src.as_u8, ip3->src_address.as_u8, sizeof (tr->src.as_u8)); clib_memcpy (tr->dst.as_u8, ip3->dst_address.as_u8, sizeof (tr->dst.as_u8)); } } encap_pkts += 4; vlib_validate_buffer_enqueue_x4 (vm, node, next_index, to_next, n_left_to_next, bi0, bi1, bi2, bi3, next0, next1, next2, next3); } /* Single loop for potentially the last three packets */ while (n_left_from > 0 && n_left_to_next > 0) { u32 bi0; vlib_buffer_t *b0; ip6_header_t *ip0 = 0; ip4_header_t *ip0_encap = 0; ip6_sr_sl_t *sl0; u32 next0 = SR_POLICY_REWRITE_NEXT_IP6_LOOKUP; bi0 = from[0]; to_next[0] = bi0; from += 1; to_next += 1; n_left_from -= 1; n_left_to_next -= 1; b0 = vlib_get_buffer (vm, bi0); sl0 = pool_elt_at_index (sm->sid_lists, vnet_buffer (b0)->ip.adj_index[VLIB_TX]); ASSERT (b0->current_data + VLIB_BUFFER_PRE_DATA_SIZE >= vec_len (sl0->rewrite)); ip0_encap = vlib_buffer_get_current (b0); clib_memcpy (((u8 *) ip0_encap) - vec_len (sl0->rewrite), sl0->rewrite, vec_len (sl0->rewrite)); vlib_buffer_advance (b0, -(word) vec_len (sl0->rewrite)); ip0 = vlib_buffer_get_current (b0); encaps_processing_v4 (node, b0, ip0, ip0_encap); if (PREDICT_FALSE (node->flags & VLIB_NODE_FLAG_TRACE) && PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) { sr_policy_rewrite_trace_t *tr = vlib_add_trace (vm, node, b0, sizeof (*tr)); clib_memcpy (tr->src.as_u8, ip0->src_address.as_u8, sizeof (tr->src.as_u8)); clib_memcpy (tr->dst.as_u8, ip0->dst_address.as_u8, sizeof (tr->dst.as_u8)); } encap_pkts++; vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next, n_left_to_next, bi0, next0); } vlib_put_next_frame (vm, node, next_index, n_left_to_next); } /* Update counters */ vlib_node_increment_counter (vm, sr_policy_rewrite_encaps_node.index, SR_POLICY_REWRITE_ERROR_COUNTER_TOTAL, encap_pkts); vlib_node_increment_counter (vm, sr_policy_rewrite_encaps_node.index, SR_POLICY_REWRITE_ERROR_COUNTER_BSID, bsid_pkts); return from_frame->n_vectors; } /* *INDENT-OFF* */ VLIB_REGISTER_NODE (sr_policy_rewrite_encaps_v4_node) = { .function = sr_policy_rewrite_encaps_v4, .name = "sr-pl-rewrite-encaps-v4", .vector_size = sizeof (u32), .format_trace = format_sr_policy_rewrite_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = SR_POLICY_REWRITE_N_ERROR, .error_strings = sr_policy_rewrite_error_strings, .n_next_nodes = SR_POLICY_REWRITE_N_NEXT, .next_nodes = { #define _(s,n) [SR_POLICY_REWRITE_NEXT_##s] = n, foreach_sr_policy_rewrite_next #undef _ }, }; /* *INDENT-ON* */ always_inline u32 ip_flow_hash (void *data) { ip4_header_t *iph = (ip4_header_t *) data; if ((iph->ip_version_and_header_length & 0xF0) == 0x40) return ip4_compute_flow_hash (iph, IP_FLOW_HASH_DEFAULT); else return ip6_compute_flow_hash ((ip6_header_t *) iph, IP_FLOW_HASH_DEFAULT); } always_inline u64 mac_to_u64 (u8 * m) { return (*((u64 *) m) & 0xffffffffffff); } always_inline u32 l2_flow_hash (vlib_buffer_t * b0) { ethernet_header_t *eh; u64 a, b, c; uword is_ip, eh_size; u16 eh_type; eh = vlib_buffer_get_current (b0); eh_type = clib_net_to_host_u16 (eh->type); eh_size = ethernet_buffer_header_size (b0); is_ip = (eh_type == ETHERNET_TYPE_IP4 || eh_type == ETHERNET_TYPE_IP6); /* since we have 2 cache lines, use them */ if (is_ip) a = ip_flow_hash ((u8 *) vlib_buffer_get_current (b0) + eh_size); else a = eh->type; b = mac_to_u64 ((u8 *) eh->dst_address); c = mac_to_u64 ((u8 *) eh->src_address); hash_mix64 (a, b, c); return (u32) c; } /** * @brief Graph node for applying a SR policy into a L2 frame */ static uword sr_policy_rewrite_encaps_l2 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * from_frame) { ip6_sr_main_t *sm = &sr_main; u32 n_left_from, next_index, *from, *to_next; from = vlib_frame_vector_args (from_frame); n_left_from = from_frame->n_vectors; next_index = node->cached_next_index; int encap_pkts = 0, bsid_pkts = 0; while (n_left_from > 0) { u32 n_left_to_next; vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); /* Quad - Loop */ while (n_left_from >= 8 && n_left_to_next >= 4) { u32 bi0, bi1, bi2, bi3; vlib_buffer_t *b0, *b1, *b2, *b3; u32 next0, next1, next2, next3; next0 = next1 = next2 = next3 = SR_POLICY_REWRITE_NEXT_IP6_LOOKUP; ethernet_header_t *en0, *en1, *en2, *en3; ip6_header_t *ip0, *ip1, *ip2, *ip3; ip6_sr_header_t *sr0, *sr1, *sr2, *sr3; ip6_sr_policy_t *sp0, *sp1, *sp2, *sp3; ip6_sr_sl_t *sl0, *sl1, *sl2, *sl3; /* Prefetch next iteration. */ { vlib_buffer_t *p4, *p5, *p6, *p7; p4 = vlib_get_buffer (vm, from[4]); p5 = vlib_get_buffer (vm, from[5]); p6 = vlib_get_buffer (vm, from[6]); p7 = vlib_get_buffer (vm, from[7]); /* Prefetch the buffer header and packet for the N+2 loop iteration */ vlib_prefetch_buffer_header (p4, LOAD); vlib_prefetch_buffer_header (p5, LOAD); vlib_prefetch_buffer_header (p6, LOAD); vlib_prefetch_buffer_header (p7, LOAD); CLIB_PREFETCH (p4->data, CLIB_CACHE_LINE_BYTES, STORE); CLIB_PREFETCH (p5->data, CLIB_CACHE_LINE_BYTES, STORE); CLIB_PREFETCH (p6->data, CLIB_CACHE_LINE_BYTES, STORE); CLIB_PREFETCH (p7->data, CLIB_CACHE_LINE_BYTES, STORE); } to_next[0] = bi0 = from[0]; to_next[1] = bi1 = from[1]; to_next[2] = bi2 = from[2]; to_next[3] = bi3 = from[3]; from += 4; to_next += 4; n_left_from -= 4; n_left_to_next -= 4; b0 = vlib_get_buffer (vm, bi0); b1 = vlib_get_buffer (vm, bi1); b2 = vlib_get_buffer (vm, bi2); b3 = vlib_get_buffer (vm, bi3); sp0 = pool_elt_at_index (sm->sr_policies, sm->sw_iface_sr_policies[vnet_buffer (b0)->sw_if_index [VLIB_RX]]); sp1 = pool_elt_at_index (sm->sr_policies, sm->sw_iface_sr_policies[vnet_buffer (b1)->sw_if_index [VLIB_RX]]); sp2 = pool_elt_at_index (sm->sr_policies, sm->sw_iface_sr_policies[vnet_buffer (b2)->sw_if_index [VLIB_RX]]); sp3 = pool_elt_at_index (sm->sr_policies, sm->sw_iface_sr_policies[vnet_buffer (b3)->sw_if_index [VLIB_RX]]); if (vec_len (sp0->segments_lists) == 1) vnet_buffer (b0)->ip.adj_index[VLIB_TX] = sp0->segments_lists[0]; else { vnet_buffer (b0)->ip.flow_hash = l2_flow_hash (b0); vnet_buffer (b0)->ip.adj_index[VLIB_TX] = sp0->segments_lists[(vnet_buffer (b0)->ip.flow_hash & (vec_len (sp0->segments_lists) - 1))]; } if (vec_len (sp1->segments_lists) == 1) vnet_buffer (b1)->ip.adj_index[VLIB_TX] = sp1->segments_lists[1]; else { vnet_buffer (b1)->ip.flow_hash = l2_flow_hash (b1); vnet_buffer (b1)->ip.adj_index[VLIB_TX] = sp1->segments_lists[(vnet_buffer (b1)->ip.flow_hash & (vec_len (sp1->segments_lists) - 1))]; } if (vec_len (sp2->segments_lists) == 1) vnet_buffer (b2)->ip.adj_index[VLIB_TX] = sp2->segments_lists[2]; else { vnet_buffer (b2)->ip.flow_hash = l2_flow_hash (b2); vnet_buffer (b2)->ip.adj_index[VLIB_TX] = sp2->segments_lists[(vnet_buffer (b2)->ip.flow_hash & (vec_len (sp2->segments_lists) - 1))]; } if (vec_len (sp3->segments_lists) == 1) vnet_buffer (b3)->ip.adj_index[VLIB_TX] = sp3->segments_lists[3]; else { vnet_buffer (b3)->ip.flow_hash = l2_flow_hash (b3); vnet_buffer (b3)->ip.adj_index[VLIB_TX] = sp3->segments_lists[(vnet_buffer (b3)->ip.flow_hash & (vec_len (sp3->segments_lists) - 1))]; } sl0 = pool_elt_at_index (sm->sid_lists, vnet_buffer (b0)->ip.adj_index[VLIB_TX]); sl1 = pool_elt_at_index (sm->sid_lists, vnet_buffer (b1)->ip.adj_index[VLIB_TX]); sl2 = pool_elt_at_index (sm->sid_lists, vnet_buffer (b2)->ip.adj_index[VLIB_TX]); sl3 = pool_elt_at_index (sm->sid_lists, vnet_buffer (b3)->ip.adj_index[VLIB_TX]); ASSERT (b0->current_data + VLIB_BUFFER_PRE_DATA_SIZE >= vec_len (sl0->rewrite)); ASSERT (b1->current_data + VLIB_BUFFER_PRE_DATA_SIZE >= vec_len (sl1->rewrite)); ASSERT (b2->current_data + VLIB_BUFFER_PRE_DATA_SIZE >= vec_len (sl2->rewrite)); ASSERT (b3->current_data + VLIB_BUFFER_PRE_DATA_SIZE >= vec_len (sl3->rewrite)); en0 = vlib_buffer_get_current (b0); en1 = vlib_buffer_get_current (b1); en2 = vlib_buffer_get_current (b2); en3 = vlib_buffer_get_current (b3); clib_memcpy (((u8 *) en0) - vec_len (sl0->rewrite), sl0->rewrite, vec_len (sl0->rewrite)); clib_memcpy (((u8 *) en1) - vec_len (sl1->rewrite), sl1->rewrite, vec_len (sl1->rewrite)); clib_memcpy (((u8 *) en2) - vec_len (sl2->rewrite), sl2->rewrite, vec_len (sl2->rewrite)); clib_memcpy (((u8 *) en3) - vec_len (sl3->rewrite), sl3->rewrite, vec_len (sl3->rewrite)); vlib_buffer_advance (b0, -(word) vec_len (sl0->rewrite)); vlib_buffer_advance (b1, -(word) vec_len (sl1->rewrite)); vlib_buffer_advance (b2, -(word) vec_len (sl2->rewrite)); vlib_buffer_advance (b3, -(word) vec_len (sl3->rewrite)); ip0 = vlib_buffer_get_current (b0); ip1 = vlib_buffer_get_current (b1); ip2 = vlib_buffer_get_current (b2); ip3 = vlib_buffer_get_current (b3); ip0->payload_length = clib_host_to_net_u16 (b0->current_length - sizeof (ip6_header_t)); ip1->payload_length = clib_host_to_net_u16 (b1->current_length - sizeof (ip6_header_t)); ip2->payload_length = clib_host_to_net_u16 (b2->current_length - sizeof (ip6_header_t)); ip3->payload_length = clib_host_to_net_u16 (b3->current_length - sizeof (ip6_header_t)); sr0 = (void *) (ip0 + 1); sr1 = (void *) (ip1 + 1); sr2 = (void *) (ip2 + 1); sr3 = (void *) (ip3 + 1); sr0->protocol = sr1->protocol = sr2->protocol = sr3->protocol = IP_PROTOCOL_IP6_NONXT; /* Which Traffic class and flow label do I set ? */ //ip0->ip_version_traffic_class_and_flow_label = clib_host_to_net_u32(0|((6&0xF)<<28)|((ip0_encap->tos&0xFF)<<20)); if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE))) { if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) { sr_policy_rewrite_trace_t *tr = vlib_add_trace (vm, node, b0, sizeof (*tr)); clib_memcpy (tr->src.as_u8, ip0->src_address.as_u8, sizeof (tr->src.as_u8)); clib_memcpy (tr->dst.as_u8, ip0->dst_address.as_u8, sizeof (tr->dst.as_u8)); } if (PREDICT_FALSE (b1->flags & VLIB_BUFFER_IS_TRACED)) { sr_policy_rewrite_trace_t *tr = vlib_add_trace (vm, node, b1, sizeof (*tr)); clib_memcpy (tr->src.as_u8, ip1->src_address.as_u8, sizeof (tr->src.as_u8)); clib_memcpy (tr->dst.as_u8, ip1->dst_address.as_u8, sizeof (tr->dst.as_u8)); } if (PREDICT_FALSE (b2->flags & VLIB_BUFFER_IS_TRACED)) { sr_policy_rewrite_trace_t *tr = vlib_add_trace (vm, node, b2, sizeof (*tr)); clib_memcpy (tr->src.as_u8, ip2->src_address.as_u8, sizeof (tr->src.as_u8)); clib_memcpy (tr->dst.as_u8, ip2->dst_address.as_u8, sizeof (tr->dst.as_u8)); } if (PREDICT_FALSE (b3->flags & VLIB_BUFFER_IS_TRACED)) { sr_policy_rewrite_trace_t *tr = vlib_add_trace (vm, node, b3, sizeof (*tr)); clib_memcpy (tr->src.as_u8, ip3->src_address.as_u8, sizeof (tr->src.as_u8)); clib_memcpy (tr->dst.as_u8, ip3->dst_address.as_u8, sizeof (tr->dst.as_u8)); } } encap_pkts += 4; vlib_validate_buffer_enqueue_x4 (vm, node, next_index, to_next, n_left_to_next, bi0, bi1, bi2, bi3, next0, next1, next2, next3); } /* Single loop for potentially the last three packets */ while (n_left_from > 0 && n_left_to_next > 0) { u32 bi0; vlib_buffer_t *b0; ip6_header_t *ip0 = 0; ip6_sr_header_t *sr0; ethernet_header_t *en0; ip6_sr_policy_t *sp0; ip6_sr_sl_t *sl0; u32 next0 = SR_POLICY_REWRITE_NEXT_IP6_LOOKUP; bi0 = from[0]; to_next[0] = bi0; from += 1; to_next += 1; n_left_from -= 1; n_left_to_next -= 1; b0 = vlib_get_buffer (vm, bi0); /* Find the SR policy */ sp0 = pool_elt_at_index (sm->sr_policies, sm->sw_iface_sr_policies[vnet_buffer (b0)->sw_if_index [VLIB_RX]]); /* In case there is more than one SL, LB among them */ if (vec_len (sp0->segments_lists) == 1) vnet_buffer (b0)->ip.adj_index[VLIB_TX] = sp0->segments_lists[0]; else { vnet_buffer (b0)->ip.flow_hash = l2_flow_hash (b0); vnet_buffer (b0)->ip.adj_index[VLIB_TX] = sp0->segments_lists[(vnet_buffer (b0)->ip.flow_hash & (vec_len (sp0->segments_lists) - 1))]; } sl0 = pool_elt_at_index (sm->sid_lists, vnet_buffer (b0)->ip.adj_index[VLIB_TX]); ASSERT (b0->current_data + VLIB_BUFFER_PRE_DATA_SIZE >= vec_len (sl0->rewrite)); en0 = vlib_buffer_get_current (b0); clib_memcpy (((u8 *) en0) - vec_len (sl0->rewrite), sl0->rewrite, vec_len (sl0->rewrite)); vlib_buffer_advance (b0, -(word) vec_len (sl0->rewrite)); ip0 = vlib_buffer_get_current (b0); ip0->payload_length = clib_host_to_net_u16 (b0->current_length - sizeof (ip6_header_t)); sr0 = (void *) (ip0 + 1); sr0->protocol = IP_PROTOCOL_IP6_NONXT; if (PREDICT_FALSE (node->flags & VLIB_NODE_FLAG_TRACE) && PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) { sr_policy_rewrite_trace_t *tr = vlib_add_trace (vm, node, b0, sizeof (*tr)); clib_memcpy (tr->src.as_u8, ip0->src_address.as_u8, sizeof (tr->src.as_u8)); clib_memcpy (tr->dst.as_u8, ip0->dst_address.as_u8, sizeof (tr->dst.as_u8)); } encap_pkts++; vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next, n_left_to_next, bi0, next0); } vlib_put_next_frame (vm, node, next_index, n_left_to_next); } /* Update counters */ vlib_node_increment_counter (vm, sr_policy_rewrite_encaps_node.index, SR_POLICY_REWRITE_ERROR_COUNTER_TOTAL, encap_pkts); vlib_node_increment_counter (vm, sr_policy_rewrite_encaps_node.index, SR_POLICY_REWRITE_ERROR_COUNTER_BSID, bsid_pkts); return from_frame->n_vectors; } /* *INDENT-OFF* */ VLIB_REGISTER_NODE (sr_policy_rewrite_encaps_l2_node) = { .function = sr_policy_rewrite_encaps_l2, .name = "sr-pl-rewrite-encaps-l2", .vector_size = sizeof (u32), .format_trace = format_sr_policy_rewrite_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = SR_POLICY_REWRITE_N_ERROR, .error_strings = sr_policy_rewrite_error_strings, .n_next_nodes = SR_POLICY_REWRITE_N_NEXT, .next_nodes = { #define _(s,n) [SR_POLICY_REWRITE_NEXT_##s] = n, foreach_sr_policy_rewrite_next #undef _ }, }; /* *INDENT-ON* */ /** * @brief Graph node for applying a SR policy into a packet. SRH insertion. */ static uword sr_policy_rewrite_insert (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * from_frame) { ip6_sr_main_t *sm = &sr_main; u32 n_left_from, next_index, *from, *to_next; from = vlib_frame_vector_args (from_frame); n_left_from = from_frame->n_vectors; next_index = node->cached_next_index; int insert_pkts = 0, bsid_pkts = 0; while (n_left_from > 0) { u32 n_left_to_next; vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); /* Quad - Loop */ while (n_left_from >= 8 && n_left_to_next >= 4) { u32 bi0, bi1, bi2, bi3; vlib_buffer_t *b0, *b1, *b2, *b3; u32 next0, next1, next2, next3; next0 = next1 = next2 = next3 = SR_POLICY_REWRITE_NEXT_IP6_LOOKUP; ip6_header_t *ip0, *ip1, *ip2, *ip3; ip6_sr_header_t *sr0, *sr1, *sr2, *sr3; ip6_sr_sl_t *sl0, *sl1, *sl2, *sl3; u16 new_l0, new_l1, new_l2, new_l3; /* Prefetch next iteration. */ { vlib_buffer_t *p4, *p5, *p6, *p7; p4 = vlib_get_buffer (vm, from[4]); p5 = vlib_get_buffer (vm, from[5]); p6 = vlib_get_buffer (vm, from[6]); p7 = vlib_get_buffer (vm, from[7]); /* Prefetch the buffer header and packet for the N+2 loop iteration */ vlib_prefetch_buffer_header (p4, LOAD); vlib_prefetch_buffer_header (p5, LOAD); vlib_prefetch_buffer_header (p6, LOAD); vlib_prefetch_buffer_header (p7, LOAD); CLIB_PREFETCH (p4->data, CLIB_CACHE_LINE_BYTES, STORE); CLIB_PREFETCH (p5->data, CLIB_CACHE_LINE_BYTES, STORE); CLIB_PREFETCH (p6->data, CLIB_CACHE_LINE_BYTES, STORE); CLIB_PREFETCH (p7->data, CLIB_CACHE_LINE_BYTES, STORE); } to_next[0] = bi0 = from[0]; to_next[1] = bi1 = from[1]; to_next[2] = bi2 = from[2]; to_next[3] = bi3 = from[3]; from += 4; to_next += 4; n_left_from -= 4; n_left_to_next -= 4; b0 = vlib_get_buffer (vm, bi0); b1 = vlib_get_buffer (vm, bi1); b2 = vlib_get_buffer (vm, bi2); b3 = vlib_get_buffer (vm, bi3); sl0 = pool_elt_at_index (sm->sid_lists, vnet_buffer (b0)->ip.adj_index[VLIB_TX]); sl1 = pool_elt_at_index (sm->sid_lists, vnet_buffer (b1)->ip.adj_index[VLIB_TX]); sl2 = pool_elt_at_index (sm->sid_lists, vnet_buffer (b2)->ip.adj_index[VLIB_TX]); sl3 = pool_elt_at_index (sm->sid_lists, vnet_buffer (b3)->ip.adj_index[VLIB_TX]); ASSERT (b0->current_data + VLIB_BUFFER_PRE_DATA_SIZE >= vec_len (sl0->rewrite)); ASSERT (b1->current_data + VLIB_BUFFER_PRE_DATA_SIZE >= vec_len (sl1->rewrite)); ASSERT (b2->current_data + VLIB_BUFFER_PRE_DATA_SIZE >= vec_len (sl2->rewrite)); ASSERT (b3->current_data + VLIB_BUFFER_PRE_DATA_SIZE >= vec_len (sl3->rewrite)); ip0 = vlib_buffer_get_current (b0); ip1 = vlib_buffer_get_current (b1); ip2 = vlib_buffer_get_current (b2); ip3 = vlib_buffer_get_current (b3); if (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS) sr0 = (ip6_sr_header_t *) (((void *) (ip0 + 1)) + ip6_ext_header_len (ip0 + 1)); else sr0 = (ip6_sr_header_t *) (ip0 + 1); if (ip1->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS) sr1 = (ip6_sr_header_t *) (((void *) (ip1 + 1)) + ip6_ext_header_len (ip1 + 1)); else sr1 = (ip6_sr_header_t *) (ip1 + 1); if (ip2->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS) sr2 = (ip6_sr_header_t *) (((void *) (ip2 + 1)) + ip6_ext_header_len (ip2 + 1)); else sr2 = (ip6_sr_header_t *) (ip2 + 1); if (ip3->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS) sr3 = (ip6_sr_header_t *) (((void *) (ip3 + 1)) + ip6_ext_header_len (ip3 + 1)); else sr3 = (ip6_sr_header_t *) (ip3 + 1); clib_memcpy ((u8 *) ip0 - vec_len (sl0->rewrite), (u8 *) ip0, (void *) sr0 - (void *) ip0); clib_memcpy ((u8 *) ip1 - vec_len (sl1->rewrite), (u8 *) ip1, (void *) sr1 - (void *) ip1); clib_memcpy ((u8 *) ip2 - vec_len (sl2->rewrite), (u8 *) ip2, (void *) sr2 - (void *) ip2); clib_memcpy ((u8 *) ip3 - vec_len (sl3->rewrite), (u8 *) ip3, (void *) sr3 - (void *) ip3); clib_memcpy (((u8 *) sr0 - vec_len (sl0->rewrite)), sl0->rewrite, vec_len (sl0->rewrite)); clib_memcpy (((u8 *) sr1 - vec_len (sl1->rewrite)), sl1->rewrite, vec_len (sl1->rewrite)); clib_memcpy (((u8 *) sr2 - vec_len (sl2->rewrite)), sl2->rewrite, vec_len (sl2->rewrite)); clib_memcpy (((u8 *) sr3 - vec_len (sl3->rewrite)), sl3->rewrite, vec_len (sl3->rewrite)); vlib_buffer_advance (b0, -(word) vec_len (sl0->rewrite)); vlib_buffer_advance (b1, -(word) vec_len (sl1->rewrite)); vlib_buffer_advance (b2, -(word) vec_len (sl2->rewrite)); vlib_buffer_advance (b3, -(word) vec_len (sl3->rewrite)); ip0 = ((void *) ip0) - vec_len (sl0->rewrite); ip1 = ((void *) ip1) - vec_len (sl1->rewrite); ip2 = ((void *) ip2) - vec_len (sl2->rewrite); ip3 = ((void *) ip3) - vec_len (sl3->rewrite); ip0->hop_limit -= 1; ip1->hop_limit -= 1; ip2->hop_limit -= 1; ip3->hop_limit -= 1; new_l0 = clib_net_to_host_u16 (ip0->payload_length) + vec_len (sl0->rewrite); new_l1 = clib_net_to_host_u16 (ip1->payload_length) + vec_len (sl1->rewrite); new_l2 = clib_net_to_host_u16 (ip2->payload_length) + vec_len (sl2->rewrite); new_l3 = clib_net_to_host_u16 (ip3->payload_length) + vec_len (sl3->rewrite); ip0->payload_length = clib_host_to_net_u16 (new_l0); ip1->payload_length = clib_host_to_net_u16 (new_l1); ip2->payload_length = clib_host_to_net_u16 (new_l2); ip3->payload_length = clib_host_to_net_u16 (new_l3); sr0 = ((void *) sr0) - vec_len (sl0->rewrite); sr1 = ((void *) sr1) - vec_len (sl1->rewrite); sr2 = ((void *) sr2) - vec_len (sl2->rewrite); sr3 = ((void *) sr3) - vec_len (sl3->rewrite); sr0->segments->as_u64[0] = ip0->dst_address.as_u64[0]; sr0->segments->as_u64[1] = ip0->dst_address.as_u64[1]; sr1->segments->as_u64[0] = ip1->dst_address.as_u64[0]; sr1->segments->as_u64[1] = ip1->dst_address.as_u64[1]; sr2->segments->as_u64[0] = ip2->dst_address.as_u64[0]; sr2->segments->as_u64[1] = ip2->dst_address.as_u64[1]; sr3->segments->as_u64[0] = ip3->dst_address.as_u64[0]; sr3->segments->as_u64[1] = ip3->dst_address.as_u64[1]; ip0->dst_address.as_u64[0] = (sr0->segments + sr0->segments_left)->as_u64[0]; ip0->dst_address.as_u64[1] = (sr0->segments + sr0->segments_left)->as_u64[1]; ip1->dst_address.as_u64[0] = (sr1->segments + sr1->segments_left)->as_u64[0]; ip1->dst_address.as_u64[1] = (sr1->segments + sr1->segments_left)->as_u64[1]; ip2->dst_address.as_u64[0] = (sr2->segments + sr2->segments_left)->as_u64[0]; ip2->dst_address.as_u64[1] = (sr2->segments + sr2->segments_left)->as_u64[1]; ip3->dst_address.as_u64[0] = (sr3->segments + sr3->segments_left)->as_u64[0]; ip3->dst_address.as_u64[1] = (sr3->segments + sr3->segments_left)->as_u64[1]; ip6_ext_header_t *ip_ext; if (ip0 + 1 == (void *) sr0) { sr0->protocol = ip0->protocol; ip0->protocol = IP_PROTOCOL_IPV6_ROUTE; } else { ip_ext = (void *) (ip0 + 1); sr0->protocol = ip_ext->next_hdr; ip_ext->next_hdr = IP_PROTOCOL_IPV6_ROUTE; } if (ip1 + 1 == (void *) sr1) { sr1->protocol = ip1->protocol; ip1->protocol = IP_PROTOCOL_IPV6_ROUTE; } else { ip_ext = (void *) (ip2 + 1); sr2->protocol = ip_ext->next_hdr; ip_ext->next_hdr = IP_PROTOCOL_IPV6_ROUTE; } if (ip2 + 1 == (void *) sr2) { sr2->protocol = ip2->protocol; ip2->protocol = IP_PROTOCOL_IPV6_ROUTE; } else { ip_ext = (void *) (ip2 + 1); sr2->protocol = ip_ext->next_hdr; ip_ext->next_hdr = IP_PROTOCOL_IPV6_ROUTE; } if (ip3 + 1 == (void *) sr3) { sr3->protocol = ip3->protocol; ip3->protocol = IP_PROTOCOL_IPV6_ROUTE; } else { ip_ext = (void *) (ip3 + 1); sr3->protocol = ip_ext->next_hdr; ip_ext->next_hdr = IP_PROTOCOL_IPV6_ROUTE; } insert_pkts += 4; if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE))) { if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) { sr_policy_rewrite_trace_t *tr = vlib_add_trace (vm, node, b0, sizeof (*tr)); clib_memcpy (tr->src.as_u8, ip0->src_address.as_u8, sizeof (tr->src.as_u8)); clib_memcpy (tr->dst.as_u8, ip0->dst_address.as_u8, sizeof (tr->dst.as_u8)); } if (PREDICT_FALSE (b1->flags & VLIB_BUFFER_IS_TRACED)) { sr_policy_rewrite_trace_t *tr = vlib_add_trace (vm, node, b1, sizeof (*tr)); clib_memcpy (tr->src.as_u8, ip1->src_address.as_u8, sizeof (tr->src.as_u8)); clib_memcpy (tr->dst.as_u8, ip1->dst_address.as_u8, sizeof (tr->dst.as_u8)); } if (PREDICT_FALSE (b2->flags & VLIB_BUFFER_IS_TRACED)) { sr_policy_rewrite_trace_t *tr = vlib_add_trace (vm, node, b2, sizeof (*tr)); clib_memcpy (tr->src.as_u8, ip2->src_address.as_u8, sizeof (tr->src.as_u8)); clib_memcpy (tr->dst.as_u8, ip2->dst_address.as_u8, sizeof (tr->dst.as_u8)); } if (PREDICT_FALSE (b3->flags & VLIB_BUFFER_IS_TRACED)) { sr_policy_rewrite_trace_t *tr = vlib_add_trace (vm, node, b3, sizeof (*tr)); clib_memcpy (tr->src.as_u8, ip3->src_address.as_u8, sizeof (tr->src.as_u8)); clib_memcpy (tr->dst.as_u8, ip3->dst_address.as_u8, sizeof (tr->dst.as_u8)); } } vlib_validate_buffer_enqueue_x4 (vm, node, next_index, to_next, n_left_to_next, bi0, bi1, bi2, bi3, next0, next1, next2, next3); } /* Single loop for potentially the last three packets */ while (n_left_from > 0 && n_left_to_next > 0) { u32 bi0; vlib_buffer_t *b0; ip6_header_t *ip0 = 0; ip6_sr_header_t *sr0 = 0; ip6_sr_sl_t *sl0; u32 next0 = SR_POLICY_REWRITE_NEXT_IP6_LOOKUP; u16 new_l0 = 0; bi0 = from[0]; to_next[0] = bi0; from += 1; to_next += 1; n_left_from -= 1; n_left_to_next -= 1; b0 = vlib_get_buffer (vm, bi0); sl0 = pool_elt_at_index (sm->sid_lists, vnet_buffer (b0)->ip.adj_index[VLIB_TX]); ASSERT (b0->current_data + VLIB_BUFFER_PRE_DATA_SIZE >= vec_len (sl0->rewrite)); ip0 = vlib_buffer_get_current (b0); if (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS) sr0 = (ip6_sr_header_t *) (((void *) (ip0 + 1)) + ip6_ext_header_len (ip0 + 1)); else sr0 = (ip6_sr_header_t *) (ip0 + 1); clib_memcpy ((u8 *) ip0 - vec_len (sl0->rewrite), (u8 *) ip0, (void *) sr0 - (void *) ip0); clib_memcpy (((u8 *) sr0 - vec_len (sl0->rewrite)), sl0->rewrite, vec_len (sl0->rewrite)); vlib_buffer_advance (b0, -(word) vec_len (sl0->rewrite)); ip0 = ((void *) ip0) - vec_len (sl0->rewrite); ip0->hop_limit -= 1; new_l0 = clib_net_to_host_u16 (ip0->payload_length) + vec_len (sl0->rewrite); ip0->payload_length = clib_host_to_net_u16 (new_l0); sr0 = ((void *) sr0) - vec_len (sl0->rewrite); sr0->segments->as_u64[0] = ip0->dst_address.as_u64[0]; sr0->segments->as_u64[1] = ip0->dst_address.as_u64[1]; ip0->dst_address.as_u64[0] = (sr0->segments + sr0->segments_left)->as_u64[0]; ip0->dst_address.as_u64[1] = (sr0->segments + sr0->segments_left)->as_u64[1]; if (ip0 + 1 == (void *) sr0) { sr0->protocol = ip0->protocol; ip0->protocol = IP_PROTOCOL_IPV6_ROUTE; } else { ip6_ext_header_t *ip_ext = (void *) (ip0 + 1); sr0->protocol = ip_ext->next_hdr; ip_ext->next_hdr = IP_PROTOCOL_IPV6_ROUTE; } if (PREDICT_FALSE (node->flags & VLIB_NODE_FLAG_TRACE) && PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) { sr_policy_rewrite_trace_t *tr = vlib_add_trace (vm, node, b0, sizeof (*tr)); clib_memcpy (tr->src.as_u8, ip0->src_address.as_u8, sizeof (tr->src.as_u8)); clib_memcpy (tr->dst.as_u8, ip0->dst_address.as_u8, sizeof (tr->dst.as_u8)); } insert_pkts++; vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next, n_left_to_next, bi0, next0); } vlib_put_next_frame (vm, node, next_index, n_left_to_next); } /* Update counters */ vlib_node_increment_counter (vm, sr_policy_rewrite_insert_node.index, SR_POLICY_REWRITE_ERROR_COUNTER_TOTAL, insert_pkts); vlib_node_increment_counter (vm, sr_policy_rewrite_insert_node.index, SR_POLICY_REWRITE_ERROR_COUNTER_BSID, bsid_pkts); return from_frame->n_vectors; } /* *INDENT-OFF* */ VLIB_REGISTER_NODE (sr_policy_rewrite_insert_node) = { .function = sr_policy_rewrite_insert, .name = "sr-pl-rewrite-insert", .vector_size = sizeof (u32), .format_trace = format_sr_policy_rewrite_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = SR_POLICY_REWRITE_N_ERROR, .error_strings = sr_policy_rewrite_error_strings, .n_next_nodes = SR_POLICY_REWRITE_N_NEXT, .next_nodes = { #define _(s,n) [SR_POLICY_REWRITE_NEXT_##s] = n, foreach_sr_policy_rewrite_next #undef _ }, }; /* *INDENT-ON* */ /** * @brief Graph node for applying a SR policy into a packet. BSID - SRH insertion. */ static uword sr_policy_rewrite_b_insert (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * from_frame) { ip6_sr_main_t *sm = &sr_main; u32 n_left_from, next_index, *from, *to_next; from = vlib_frame_vector_args (from_frame); n_left_from = from_frame->n_vectors; next_index = node->cached_next_index; int insert_pkts = 0, bsid_pkts = 0; while (n_left_from > 0) { u32 n_left_to_next; vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); /* Quad - Loop */ while (n_left_from >= 8 && n_left_to_next >= 4) { u32 bi0, bi1, bi2, bi3; vlib_buffer_t *b0, *b1, *b2, *b3; u32 next0, next1, next2, next3; next0 = next1 = next2 = next3 = SR_POLICY_REWRITE_NEXT_IP6_LOOKUP; ip6_header_t *ip0, *ip1, *ip2, *ip3; ip6_sr_header_t *sr0, *sr1, *sr2, *sr3; ip6_sr_sl_t *sl0, *sl1, *sl2, *sl3; u16 new_l0, new_l1, new_l2, new_l3; /* Prefetch next iteration. */ { vlib_buffer_t *p4, *p5, *p6, *p7; p4 = vlib_get_buffer (vm, from[4]); p5 = vlib_get_buffer (vm, from[5]); p6 = vlib_get_buffer (vm, from[6]); p7 = vlib_get_buffer (vm, from[7]); /* Prefetch the buffer header and packet for the N+2 loop iteration */ vlib_prefetch_buffer_header (p4, LOAD); vlib_prefetch_buffer_header (p5, LOAD); vlib_prefetch_buffer_header (p6, LOAD); vlib_prefetch_buffer_header (p7, LOAD); CLIB_PREFETCH (p4->data, CLIB_CACHE_LINE_BYTES, STORE); CLIB_PREFETCH (p5->data, CLIB_CACHE_LINE_BYTES, STORE); CLIB_PREFETCH (p6->data, CLIB_CACHE_LINE_BYTES, STORE); CLIB_PREFETCH (p7->data, CLIB_CACHE_LINE_BYTES, STORE); } to_next[0] = bi0 = from[0]; to_next[1] = bi1 = from[1]; to_next[2] = bi2 = from[2]; to_next[3] = bi3 = from[3]; from += 4; to_next += 4; n_left_from -= 4; n_left_to_next -= 4; b0 = vlib_get_buffer (vm, bi0); b1 = vlib_get_buffer (vm, bi1); b2 = vlib_get_buffer (vm, bi2); b3 = vlib_get_buffer (vm, bi3); sl0 = pool_elt_at_index (sm->sid_lists, vnet_buffer (b0)->ip.adj_index[VLIB_TX]); sl1 = pool_elt_at_index (sm->sid_lists, vnet_buffer (b1)->ip.adj_index[VLIB_TX]); sl2 = pool_elt_at_index (sm->sid_lists, vnet_buffer (b2)->ip.adj_index[VLIB_TX]); sl3 = pool_elt_at_index (sm->sid_lists, vnet_buffer (b3)->ip.adj_index[VLIB_TX]); ASSERT (b0->current_data + VLIB_BUFFER_PRE_DATA_SIZE >= vec_len (sl0->rewrite_bsid)); ASSERT (b1->current_data + VLIB_BUFFER_PRE_DATA_SIZE >= vec_len (sl1->rewrite_bsid)); ASSERT (b2->current_data + VLIB_BUFFER_PRE_DATA_SIZE >= vec_len (sl2->rewrite_bsid)); ASSERT (b3->current_data + VLIB_BUFFER_PRE_DATA_SIZE >= vec_len (sl3->rewrite_bsid)); ip0 = vlib_buffer_get_current (b0); ip1 = vlib_buffer_get_current (b1); ip2 = vlib_buffer_get_current (b2); ip3 = vlib_buffer_get_current (b3); if (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS) sr0 = (ip6_sr_header_t *) (((void *) (ip0 + 1)) + ip6_ext_header_len (ip0 + 1)); else sr0 = (ip6_sr_header_t *) (ip0 + 1); if (ip1->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS) sr1 = (ip6_sr_header_t *) (((void *) (ip1 + 1)) + ip6_ext_header_len (ip1 + 1)); else sr1 = (ip6_sr_header_t *) (ip1 + 1); if (ip2->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS) sr2 = (ip6_sr_header_t *) (((void *) (ip2 + 1)) + ip6_ext_header_len (ip2 + 1)); else sr2 = (ip6_sr_header_t *) (ip2 + 1); if (ip3->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS) sr3 = (ip6_sr_header_t *) (((void *) (ip3 + 1)) + ip6_ext_header_len (ip3 + 1)); else sr3 = (ip6_sr_header_t *) (ip3 + 1); clib_memcpy ((u8 *) ip0 - vec_len (sl0->rewrite_bsid), (u8 *) ip0, (void *) sr0 - (void *) ip0); clib_memcpy ((u8 *) ip1 - vec_len (sl1->rewrite_bsid), (u8 *) ip1, (void *) sr1 - (void *) ip1); clib_memcpy ((u8 *) ip2 - vec_len (sl2->rewrite_bsid), (u8 *) ip2, (void *) sr2 - (void *) ip2); clib_memcpy ((u8 *) ip3 - vec_len (sl3->rewrite_bsid), (u8 *) ip3, (void *) sr3 - (void *) ip3); clib_memcpy (((u8 *) sr0 - vec_len (sl0->rewrite_bsid)), sl0->rewrite_bsid, vec_len (sl0->rewrite_bsid)); clib_memcpy (((u8 *) sr1 - vec_len (sl1->rewrite_bsid)), sl1->rewrite_bsid, vec_len (sl1->rewrite_bsid)); clib_memcpy (((u8 *) sr2 - vec_len (sl2->rewrite_bsid)), sl2->rewrite_bsid, vec_len (sl2->rewrite_bsid)); clib_memcpy (((u8 *) sr3 - vec_len (sl3->rewrite_bsid)), sl3->rewrite_bsid, vec_len (sl3->rewrite_bsid)); vlib_buffer_advance (b0, -(word) vec_len (sl0->rewrite_bsid)); vlib_buffer_advance (b1, -(word) vec_len (sl1->rewrite_bsid)); vlib_buffer_advance (b2, -(word) vec_len (sl2->rewrite_bsid)); vlib_buffer_advance (b3, -(word) vec_len (sl3->rewrite_bsid)); ip0 = ((void *) ip0) - vec_len (sl0->rewrite_bsid); ip1 = ((void *) ip1) - vec_len (sl1->rewrite_bsid); ip2 = ((void *) ip2) - vec_len (sl2->rewrite_bsid); ip3 = ((void *) ip3) - vec_len (sl3->rewrite_bsid); ip0->hop_limit -= 1; ip1->hop_limit -= 1; ip2->hop_limit -= 1; ip3->hop_limit -= 1; new_l0 = clib_net_to_host_u16 (ip0->payload_length) + vec_len (sl0->rewrite_bsid); new_l1 = clib_net_to_host_u16 (ip1->payload_length) + vec_len (sl1->rewrite_bsid); new_l2 = clib_net_to_host_u16 (ip2->payload_length) + vec_len (sl2->rewrite_bsid); new_l3 = clib_net_to_host_u16 (ip3->payload_length) + vec_len (sl3->rewrite_bsid); ip0->payload_length = clib_host_to_net_u16 (new_l0); ip1->payload_length = clib_host_to_net_u16 (new_l1); ip2->payload_length = clib_host_to_net_u16 (new_l2); ip3->payload_length = clib_host_to_net_u16 (new_l3); sr0 = ((void *) sr0) - vec_len (sl0->rewrite_bsid); sr1 = ((void *) sr1) - vec_len (sl1->rewrite_bsid); sr2 = ((void *) sr2) - vec_len (sl2->rewrite_bsid); sr3 = ((void *) sr3) - vec_len (sl3->rewrite_bsid); ip0->dst_address.as_u64[0] = (sr0->segments + sr0->segments_left)->as_u64[0]; ip0->dst_address.as_u64[1] = (sr0->segments + sr0->segments_left)->as_u64[1]; ip1->dst_address.as_u64[0] = (sr1->segments + sr1->segments_left)->as_u64[0]; ip1->dst_address.as_u64[1] = (sr1->segments + sr1->segments_left)->as_u64[1]; ip2->dst_address.as_u64[0] = (sr2->segments + sr2->segments_left)->as_u64[0]; ip2->dst_address.as_u64[1] = (sr2->segments + sr2->segments_left)->as_u64[1]; ip3->dst_address.as_u64[0] = (sr3->segments + sr3->segments_left)->as_u64[0]; ip3->dst_address.as_u64[1] = (sr3->segments + sr3->segments_left)->as_u64[1]; ip6_ext_header_t *ip_ext; if (ip0 + 1 == (void *) sr0) { sr0->protocol = ip0->protocol; ip0->protocol = IP_PROTOCOL_IPV6_ROUTE; } else { ip_ext = (void *) (ip0 + 1); sr0->protocol = ip_ext->next_hdr; ip_ext->next_hdr = IP_PROTOCOL_IPV6_ROUTE; } if (ip1 + 1 == (void *) sr1) { sr1->protocol = ip1->protocol; ip1->protocol = IP_PROTOCOL_IPV6_ROUTE; } else { ip_ext = (void *) (ip2 + 1); sr2->protocol = ip_ext->next_hdr; ip_ext->next_hdr = IP_PROTOCOL_IPV6_ROUTE; } if (ip2 + 1 == (void *) sr2) { sr2->protocol = ip2->protocol; ip2->protocol = IP_PROTOCOL_IPV6_ROUTE; } else { ip_ext = (void *) (ip2 + 1); sr2->protocol = ip_ext->next_hdr; ip_ext->next_hdr = IP_PROTOCOL_IPV6_ROUTE; } if (ip3 + 1 == (void *) sr3) { sr3->protocol = ip3->protocol; ip3->protocol = IP_PROTOCOL_IPV6_ROUTE; } else { ip_ext = (void *) (ip3 + 1); sr3->protocol = ip_ext->next_hdr; ip_ext->next_hdr = IP_PROTOCOL_IPV6_ROUTE; } insert_pkts += 4; if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE))) { if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) { sr_policy_rewrite_trace_t *tr = vlib_add_trace (vm, node, b0, sizeof (*tr)); clib_memcpy (tr->src.as_u8, ip0->src_address.as_u8, sizeof (tr->src.as_u8)); clib_memcpy (tr->dst.as_u8, ip0->dst_address.as_u8, sizeof (tr->dst.as_u8)); } if (PREDICT_FALSE (b1->flags & VLIB_BUFFER_IS_TRACED)) { sr_policy_rewrite_trace_t *tr = vlib_add_trace (vm, node, b1, sizeof (*tr)); clib_memcpy (tr->src.as_u8, ip1->src_address.as_u8, sizeof (tr->src.as_u8)); clib_memcpy (tr->dst.as_u8, ip1->dst_address.as_u8, sizeof (tr->dst.as_u8)); } if (PREDICT_FALSE (b2->flags & VLIB_BUFFER_IS_TRACED)) { sr_policy_rewrite_trace_t *tr = vlib_add_trace (vm, node, b2, sizeof (*tr)); clib_memcpy (tr->src.as_u8, ip2->src_address.as_u8, sizeof (tr->src.as_u8)); clib_memcpy (tr->dst.as_u8, ip2->dst_address.as_u8, sizeof (tr->dst.as_u8)); } if (PREDICT_FALSE (b3->flags & VLIB_BUFFER_IS_TRACED)) { sr_policy_rewrite_trace_t *tr = vlib_add_trace (vm, node, b3, sizeof (*tr)); clib_memcpy (tr->src.as_u8, ip3->src_address.as_u8, sizeof (tr->src.as_u8)); clib_memcpy (tr->dst.as_u8, ip3->dst_address.as_u8, sizeof (tr->dst.as_u8)); } } vlib_validate_buffer_enqueue_x4 (vm, node, next_index, to_next, n_left_to_next, bi0, bi1, bi2, bi3, next0, next1, next2, next3); } /* Single loop for potentially the last three packets */ while (n_left_from > 0 && n_left_to_next > 0) { u32 bi0; vlib_buffer_t *b0; ip6_header_t *ip0 = 0; ip6_sr_header_t *sr0 = 0; ip6_sr_sl_t *sl0; u32 next0 = SR_POLICY_REWRITE_NEXT_IP6_LOOKUP; u16 new_l0 = 0; bi0 = from[0]; to_next[0] = bi0; from += 1; to_next += 1; n_left_from -= 1; n_left_to_next -= 1; b0 = vlib_get_buffer (vm, bi0); sl0 = pool_elt_at_index (sm->sid_lists, vnet_buffer (b0)->ip.adj_index[VLIB_TX]); ASSERT (b0->current_data + VLIB_BUFFER_PRE_DATA_SIZE >= vec_len (sl0->rewrite_bsid)); ip0 = vlib_buffer_get_current (b0); if (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS) sr0 = (ip6_sr_header_t *) (((void *) (ip0 + 1)) + ip6_ext_header_len (ip0 + 1)); else sr0 = (ip6_sr_header_t *) (ip0 + 1); clib_memcpy ((u8 *) ip0 - vec_len (sl0->rewrite_bsid), (u8 *) ip0, (void *) sr0 - (void *) ip0); clib_memcpy (((u8 *) sr0 - vec_len (sl0->rewrite_bsid)), sl0->rewrite_bsid, vec_len (sl0->rewrite_bsid)); vlib_buffer_advance (b0, -(word) vec_len (sl0->rewrite_bsid)); ip0 = ((void *) ip0) - vec_len (sl0->rewrite_bsid); ip0->hop_limit -= 1; new_l0 = clib_net_to_host_u16 (ip0->payload_length) + vec_len (sl0->rewrite_bsid); ip0->payload_length = clib_host_to_net_u16 (new_l0); sr0 = ((void *) sr0) - vec_len (sl0->rewrite_bsid); ip0->dst_address.as_u64[0] = (sr0->segments + sr0->segments_left)->as_u64[0]; ip0->dst_address.as_u64[1] = (sr0->segments + sr0->segments_left)->as_u64[1]; if (ip0 + 1 == (void *) sr0) { sr0->protocol = ip0->protocol; ip0->protocol = IP_PROTOCOL_IPV6_ROUTE; } else { ip6_ext_header_t *ip_ext = (void *) (ip0 + 1); sr0->protocol = ip_ext->next_hdr; ip_ext->next_hdr = IP_PROTOCOL_IPV6_ROUTE; } if (PREDICT_FALSE (node->flags & VLIB_NODE_FLAG_TRACE) && PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) { sr_policy_rewrite_trace_t *tr = vlib_add_trace (vm, node, b0, sizeof (*tr)); clib_memcpy (tr->src.as_u8, ip0->src_address.as_u8, sizeof (tr->src.as_u8)); clib_memcpy (tr->dst.as_u8, ip0->dst_address.as_u8, sizeof (tr->dst.as_u8)); } insert_pkts++; vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next, n_left_to_next, bi0, next0); } vlib_put_next_frame (vm, node, next_index, n_left_to_next); } /* Update counters */ vlib_node_increment_counter (vm, sr_policy_rewrite_insert_node.index, SR_POLICY_REWRITE_ERROR_COUNTER_TOTAL, insert_pkts); vlib_node_increment_counter (vm, sr_policy_rewrite_insert_node.index, SR_POLICY_REWRITE_ERROR_COUNTER_BSID, bsid_pkts); return from_frame->n_vectors; } /* *INDENT-OFF* */ VLIB_REGISTER_NODE (sr_policy_rewrite_b_insert_node) = { .function = sr_policy_rewrite_b_insert, .name = "sr-pl-rewrite-b-insert", .vector_size = sizeof (u32), .format_trace = format_sr_policy_rewrite_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = SR_POLICY_REWRITE_N_ERROR, .error_strings = sr_policy_rewrite_error_strings, .n_next_nodes = SR_POLICY_REWRITE_N_NEXT, .next_nodes = { #define _(s,n) [SR_POLICY_REWRITE_NEXT_##s] = n, foreach_sr_policy_rewrite_next #undef _ }, }; /* *INDENT-ON* */ /** * @brief Function BSID encapsulation */ static_always_inline void end_bsid_encaps_srh_processing (vlib_node_runtime_t * node, vlib_buffer_t * b0, ip6_header_t * ip0, ip6_sr_header_t * sr0, u32 * next0) { ip6_address_t *new_dst0; if (PREDICT_FALSE (!sr0)) goto error_bsid_encaps; if (PREDICT_TRUE (sr0->type == ROUTING_HEADER_TYPE_SR)) { if (PREDICT_TRUE (sr0->segments_left != 0)) { sr0->segments_left -= 1; new_dst0 = (ip6_address_t *) (sr0->segments); new_dst0 += sr0->segments_left; ip0->dst_address.as_u64[0] = new_dst0->as_u64[0]; ip0->dst_address.as_u64[1] = new_dst0->as_u64[1]; return; } } error_bsid_encaps: *next0 = SR_POLICY_REWRITE_NEXT_ERROR; b0->error = node->errors[SR_POLICY_REWRITE_ERROR_BSID_ZERO]; } /** * @brief Graph node for applying a SR policy BSID - Encapsulation */ static uword sr_policy_rewrite_b_encaps (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * from_frame) { ip6_sr_main_t *sm = &sr_main; u32 n_left_from, next_index, *from, *to_next; from = vlib_frame_vector_args (from_frame); n_left_from = from_frame->n_vectors; next_index = node->cached_next_index; int encap_pkts = 0, bsid_pkts = 0; while (n_left_from > 0) { u32 n_left_to_next; vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); /* Quad - Loop */ while (n_left_from >= 8 && n_left_to_next >= 4) { u32 bi0, bi1, bi2, bi3; vlib_buffer_t *b0, *b1, *b2, *b3; u32 next0, next1, next2, next3; next0 = next1 = next2 = next3 = SR_POLICY_REWRITE_NEXT_IP6_LOOKUP; ip6_header_t *ip0, *ip1, *ip2, *ip3; ip6_header_t *ip0_encap, *ip1_encap, *ip2_encap, *ip3_encap; ip6_sr_header_t *sr0, *sr1, *sr2, *sr3; ip6_ext_header_t *prev0, *prev1, *prev2, *prev3; ip6_sr_sl_t *sl0, *sl1, *sl2, *sl3; /* Prefetch next iteration. */ { vlib_buffer_t *p4, *p5, *p6, *p7; p4 = vlib_get_buffer (vm, from[4]); p5 = vlib_get_buffer (vm, from[5]); p6 = vlib_get_buffer (vm, from[6]); p7 = vlib_get_buffer (vm, from[7]); /* Prefetch the buffer header and packet for the N+2 loop iteration */ vlib_prefetch_buffer_header (p4, LOAD); vlib_prefetch_buffer_header (p5, LOAD); vlib_prefetch_buffer_header (p6, LOAD); vlib_prefetch_buffer_header (p7, LOAD); CLIB_PREFETCH (p4->data, CLIB_CACHE_LINE_BYTES, STORE); CLIB_PREFETCH (p5->data, CLIB_CACHE_LINE_BYTES, STORE); CLIB_PREFETCH (p6->data, CLIB_CACHE_LINE_BYTES, STORE); CLIB_PREFETCH (p7->data, CLIB_CACHE_LINE_BYTES, STORE); } to_next[0] = bi0 = from[0]; to_next[1] = bi1 = from[1]; to_next[2] = bi2 = from[2]; to_next[3] = bi3 = from[3]; from += 4; to_next += 4; n_left_from -= 4; n_left_to_next -= 4; b0 = vlib_get_buffer (vm, bi0); b1 = vlib_get_buffer (vm, bi1); b2 = vlib_get_buffer (vm, bi2); b3 = vlib_get_buffer (vm, bi3); sl0 = pool_elt_at_index (sm->sid_lists, vnet_buffer (b0)->ip.adj_index[VLIB_TX]); sl1 = pool_elt_at_index (sm->sid_lists, vnet_buffer (b1)->ip.adj_index[VLIB_TX]); sl2 = pool_elt_at_index (sm->sid_lists, vnet_buffer (b2)->ip.adj_index[VLIB_TX]); sl3 = pool_elt_at_index (sm->sid_lists, vnet_buffer (b3)->ip.adj_index[VLIB_TX]); ASSERT (b0->current_data + VLIB_BUFFER_PRE_DATA_SIZE >= vec_len (sl0->rewrite)); ASSERT (b1->current_data + VLIB_BUFFER_PRE_DATA_SIZE >= vec_len (sl1->rewrite)); ASSERT (b2->current_data + VLIB_BUFFER_PRE_DATA_SIZE >= vec_len (sl2->rewrite)); ASSERT (b3->current_data + VLIB_BUFFER_PRE_DATA_SIZE >= vec_len (sl3->rewrite)); ip0_encap = vlib_buffer_get_current (b0); ip1_encap = vlib_buffer_get_current (b1); ip2_encap = vlib_buffer_get_current (b2); ip3_encap = vlib_buffer_get_current (b3); ip6_ext_header_find_t (ip0_encap, prev0, sr0, IP_PROTOCOL_IPV6_ROUTE); ip6_ext_header_find_t (ip1_encap, prev1, sr1, IP_PROTOCOL_IPV6_ROUTE); ip6_ext_header_find_t (ip2_encap, prev2, sr2, IP_PROTOCOL_IPV6_ROUTE); ip6_ext_header_find_t (ip3_encap, prev3, sr3, IP_PROTOCOL_IPV6_ROUTE); end_bsid_encaps_srh_processing (node, b0, ip0_encap, sr0, &next0); end_bsid_encaps_srh_processing (node, b1, ip1_encap, sr1, &next1); end_bsid_encaps_srh_processing (node, b2, ip2_encap, sr2, &next2); end_bsid_encaps_srh_processing (node, b3, ip3_encap, sr3, &next3); clib_memcpy (((u8 *) ip0_encap) - vec_len (sl0->rewrite), sl0->rewrite, vec_len (sl0->rewrite)); clib_memcpy (((u8 *) ip1_encap) - vec_len (sl1->rewrite), sl1->rewrite, vec_len (sl1->rewrite)); clib_memcpy (((u8 *) ip2_encap) - vec_len (sl2->rewrite), sl2->rewrite, vec_len (sl2->rewrite)); clib_memcpy (((u8 *) ip3_encap) - vec_len (sl3->rewrite), sl3->rewrite, vec_len (sl3->rewrite)); vlib_buffer_advance (b0, -(word) vec_len (sl0->rewrite)); vlib_buffer_advance (b1, -(word) vec_len (sl1->rewrite)); vlib_buffer_advance (b2, -(word) vec_len (sl2->rewrite)); vlib_buffer_advance (b3, -(word) vec_len (sl3->rewrite)); ip0 = vlib_buffer_get_current (b0); ip1 = vlib_buffer_get_current (b1); ip2 = vlib_buffer_get_current (b2); ip3 = vlib_buffer_get_current (b3); encaps_processing_v6 (node, b0, ip0, ip0_encap); encaps_processing_v6 (node, b1, ip1, ip1_encap); encaps_processing_v6 (node, b2, ip2, ip2_encap); encaps_processing_v6 (node, b3, ip3, ip3_encap); if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE))) { if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) { sr_policy_rewrite_trace_t *tr = vlib_add_trace (vm, node, b0, sizeof (*tr)); clib_memcpy (tr->src.as_u8, ip0->src_address.as_u8, sizeof (tr->src.as_u8)); clib_memcpy (tr->dst.as_u8, ip0->dst_address.as_u8, sizeof (tr->dst.as_u8)); } if (PREDICT_FALSE (b1->flags & VLIB_BUFFER_IS_TRACED)) { sr_policy_rewrite_trace_t *tr = vlib_add_trace (vm, node, b1, sizeof (*tr)); clib_memcpy (tr->src.as_u8, ip1->src_address.as_u8, sizeof (tr->src.as_u8)); clib_memcpy (tr->dst.as_u8, ip1->dst_address.as_u8, sizeof (tr->dst.as_u8)); } if (PREDICT_FALSE (b2->flags & VLIB_BUFFER_IS_TRACED)) { sr_policy_rewrite_trace_t *tr = vlib_add_trace (vm, node, b2, sizeof (*tr)); clib_memcpy (tr->src.as_u8, ip2->src_address.as_u8, sizeof (tr->src.as_u8)); clib_memcpy (tr->dst.as_u8, ip2->dst_address.as_u8, sizeof (tr->dst.as_u8)); } if (PREDICT_FALSE (b3->flags & VLIB_BUFFER_IS_TRACED)) { sr_policy_rewrite_trace_t *tr = vlib_add_trace (vm, node, b3, sizeof (*tr)); clib_memcpy (tr->src.as_u8, ip3->src_address.as_u8, sizeof (tr->src.as_u8)); clib_memcpy (tr->dst.as_u8, ip3->dst_address.as_u8, sizeof (tr->dst.as_u8)); } } encap_pkts += 4; vlib_validate_buffer_enqueue_x4 (vm, node, next_index, to_next, n_left_to_next, bi0, bi1, bi2, bi3, next0, next1, next2, next3); } /* Single loop for potentially the last three packets */ while (n_left_from > 0 && n_left_to_next > 0) { u32 bi0; vlib_buffer_t *b0; ip6_header_t *ip0 = 0, *ip0_encap = 0; ip6_ext_header_t *prev0; ip6_sr_header_t *sr0; ip6_sr_sl_t *sl0; u32 next0 = SR_POLICY_REWRITE_NEXT_IP6_LOOKUP; bi0 = from[0]; to_next[0] = bi0; from += 1; to_next += 1; n_left_from -= 1; n_left_to_next -= 1; b0 = vlib_get_buffer (vm, bi0); sl0 = pool_elt_at_index (sm->sid_lists, vnet_buffer (b0)->ip.adj_index[VLIB_TX]); ASSERT (b0->current_data + VLIB_BUFFER_PRE_DATA_SIZE >= vec_len (sl0->rewrite)); ip0_encap = vlib_buffer_get_current (b0); ip6_ext_header_find_t (ip0_encap, prev0, sr0, IP_PROTOCOL_IPV6_ROUTE); end_bsid_encaps_srh_processing (node, b0, ip0_encap, sr0, &next0); clib_memcpy (((u8 *) ip0_encap) - vec_len (sl0->rewrite), sl0->rewrite, vec_len (sl0->rewrite)); vlib_buffer_advance (b0, -(word) vec_len (sl0->rewrite)); ip0 = vlib_buffer_get_current (b0); encaps_processing_v6 (node, b0, ip0, ip0_encap); if (PREDICT_FALSE (node->flags & VLIB_NODE_FLAG_TRACE) && PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) { sr_policy_rewrite_trace_t *tr = vlib_add_trace (vm, node, b0, sizeof (*tr)); clib_memcpy (tr->src.as_u8, ip0->src_address.as_u8, sizeof (tr->src.as_u8)); clib_memcpy (tr->dst.as_u8, ip0->dst_address.as_u8, sizeof (tr->dst.as_u8)); } encap_pkts++; vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next, n_left_to_next, bi0, next0); } vlib_put_next_frame (vm, node, next_index, n_left_to_next); } /* Update counters */ vlib_node_increment_counter (vm, sr_policy_rewrite_encaps_node.index, SR_POLICY_REWRITE_ERROR_COUNTER_TOTAL, encap_pkts); vlib_node_increment_counter (vm, sr_policy_rewrite_encaps_node.index, SR_POLICY_REWRITE_ERROR_COUNTER_BSID, bsid_pkts); return from_frame->n_vectors; } /* *INDENT-OFF* */ VLIB_REGISTER_NODE (sr_policy_rewrite_b_encaps_node) = { .function = sr_policy_rewrite_b_encaps, .name = "sr-pl-rewrite-b-encaps", .vector_size = sizeof (u32), .format_trace = format_sr_policy_rewrite_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = SR_POLICY_REWRITE_N_ERROR, .error_strings = sr_policy_rewrite_error_strings, .n_next_nodes = SR_POLICY_REWRITE_N_NEXT, .next_nodes = { #define _(s,n) [SR_POLICY_REWRITE_NEXT_##s] = n, foreach_sr_policy_rewrite_next #undef _ }, }; /* *INDENT-ON* */ /*************************** SR Segment Lists DPOs ****************************/ static u8 * format_sr_segment_list_dpo (u8 * s, va_list * args) { ip6_sr_main_t *sm = &sr_main; ip6_address_t *addr; ip6_sr_sl_t *sl; index_t index = va_arg (*args, index_t); CLIB_UNUSED (u32 indent) = va_arg (*args, u32); s = format (s, "SR: Segment List index:[%d]", index); s = format (s, "\n\tSegments:"); sl = pool_elt_at_index (sm->sid_lists, index); s = format (s, "< "); vec_foreach (addr, sl->segments) { s = format (s, "%U, ", format_ip6_address, addr); } s = format (s, "\b\b > - "); s = format (s, "Weight: %u", sl->weight); return s; } const static dpo_vft_t sr_policy_rewrite_vft = { .dv_lock = sr_dpo_lock, .dv_unlock = sr_dpo_unlock, .dv_format = format_sr_segment_list_dpo, }; const static char *const sr_pr_encaps_ip6_nodes[] = { "sr-pl-rewrite-encaps", NULL, }; const static char *const sr_pr_encaps_ip4_nodes[] = { "sr-pl-rewrite-encaps-v4", NULL, }; const static char *const *const sr_pr_encaps_nodes[DPO_PROTO_NUM] = { [DPO_PROTO_IP6] = sr_pr_encaps_ip6_nodes, [DPO_PROTO_IP4] = sr_pr_encaps_ip4_nodes, }; const static char *const sr_pr_insert_ip6_nodes[] = { "sr-pl-rewrite-insert", NULL, }; const static char *const *const sr_pr_insert_nodes[DPO_PROTO_NUM] = { [DPO_PROTO_IP6] = sr_pr_insert_ip6_nodes, }; const static char *const sr_pr_bsid_insert_ip6_nodes[] = { "sr-pl-rewrite-b-insert", NULL, }; const static char *const *const sr_pr_bsid_insert_nodes[DPO_PROTO_NUM] = { [DPO_PROTO_IP6] = sr_pr_bsid_insert_ip6_nodes, }; const static char *const sr_pr_bsid_encaps_ip6_nodes[] = { "sr-pl-rewrite-b-encaps", NULL, }; const static char *const *const sr_pr_bsid_encaps_nodes[DPO_PROTO_NUM] = { [DPO_PROTO_IP6] = sr_pr_bsid_encaps_ip6_nodes, }; /********************* SR Policy Rewrite initialization ***********************/ /** * @brief SR Policy Rewrite initialization */ clib_error_t * sr_policy_rewrite_init (vlib_main_t * vm) { ip6_sr_main_t *sm = &sr_main; /* Init memory for sr policy keys (bsid <-> ip6_address_t) */ mhash_init (&sm->sr_policies_index_hash, sizeof (uword), sizeof (ip6_address_t)); /* Init SR VPO DPOs type */ sr_pr_encaps_dpo_type = dpo_register_new_type (&sr_policy_rewrite_vft, sr_pr_encaps_nodes); sr_pr_insert_dpo_type = dpo_register_new_type (&sr_policy_rewrite_vft, sr_pr_insert_nodes); sr_pr_bsid_encaps_dpo_type = dpo_register_new_type (&sr_policy_rewrite_vft, sr_pr_bsid_encaps_nodes); sr_pr_bsid_insert_dpo_type = dpo_register_new_type (&sr_policy_rewrite_vft, sr_pr_bsid_insert_nodes); /* Register the L2 encaps node used in HW redirect */ sm->l2_sr_policy_rewrite_index = sr_policy_rewrite_encaps_node.index; sm->fib_table_ip6 = (u32) ~ 0; sm->fib_table_ip4 = (u32) ~ 0; return 0; } VLIB_INIT_FUNCTION (sr_policy_rewrite_init); /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */