ipsec: remove dedicated IPSec tunnels

APIs for dedicated IPSec tunnels will remain in this release and are
used to programme the IPIP tunnel protect. APIs will be removed in a
future release.

see:
 https://wiki.fd.io/view/VPP/IPSec

Type: feature

Change-Id: I0f01f597946fdd15dfa5cae3643104d5a9c83089
Signed-off-by: Neale Ranns <nranns@cisco.com>

1 files changed, 0 insertions, 600 deletions

diff --git a/src/vnet/ipsec/ipsec_if.c b/src/vnet/ipsec/ipsec_if.c
deleted file mode 100644
index a7372747797..00000000000
--- a/src/vnet/ipsec/ipsec_if.c
+++ /dev/null
@@ -1,600 +0,0 @@
-/*
- * ipsec_if.c : IPSec interface support
- *
- * Copyright (c) 2015 Cisco and/or its affiliates.
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at:
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <vnet/vnet.h>
-#include <vnet/api_errno.h>
-#include <vnet/ip/ip.h>
-#include <vnet/fib/fib.h>
-#include <vnet/udp/udp.h>
-#include <vnet/adj/adj_midchain.h>
-
-#include <vnet/ipsec/ipsec.h>
-#include <vnet/ipsec/esp.h>
-
-void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length);
-
-static u8 *
-format_ipsec_name (u8 * s, va_list * args)
-{
-  u32 dev_instance = va_arg (*args, u32);
-  ipsec_main_t *im = &ipsec_main;
-  ipsec_tunnel_if_t *t = im->tunnel_interfaces + dev_instance;
-
-  return format (s, "ipsec%d", t->show_instance);
-}
-
-/* Statistics (not really errors) */
-#define foreach_ipsec_if_tx_error    \
-_(TX, "good packets transmitted")
-
-static void
-ipsec_if_tunnel_stack (adj_index_t ai)
-{
-  ipsec_main_t *ipm = &ipsec_main;
-  ipsec_tunnel_if_t *it;
-  ip_adjacency_t *adj;
-  u32 sw_if_index;
-
-  adj = adj_get (ai);
-  sw_if_index = adj->rewrite_header.sw_if_index;
-
-  if ((vec_len (ipm->ipsec_if_by_sw_if_index) <= sw_if_index) ||
-      (~0 == ipm->ipsec_if_by_sw_if_index[sw_if_index]))
-    return;
-
-  it = pool_elt_at_index (ipm->tunnel_interfaces,
-			  ipm->ipsec_if_by_sw_if_index[sw_if_index]);
-
-  if (!vnet_hw_interface_is_link_up (vnet_get_main (), it->hw_if_index))
-    {
-      adj_midchain_delegate_unstack (ai);
-    }
-  else
-    {
-      ipsec_sa_t *sa;
-
-      sa = ipsec_sa_get (it->output_sa_index);
-
-      /* *INDENT-OFF* */
-      fib_prefix_t pfx = {
-	.fp_addr = sa->tunnel_dst_addr,
-	.fp_len = (ipsec_sa_is_set_IS_TUNNEL_V6(sa) ? 128 : 32),
-	.fp_proto = (ipsec_sa_is_set_IS_TUNNEL_V6(sa) ?
-                     FIB_PROTOCOL_IP6 :
-                     FIB_PROTOCOL_IP4),
-      };
-      /* *INDENT-ON* */
-
-      adj_midchain_delegate_stack (ai, sa->tx_fib_index, &pfx);
-    }
-}
-
-/**
- * @brief Call back when restacking all adjacencies on a IPSec interface
- */
-static adj_walk_rc_t
-ipsec_if_adj_walk_cb (adj_index_t ai, void *ctx)
-{
-  ipsec_if_tunnel_stack (ai);
-
-  return (ADJ_WALK_RC_CONTINUE);
-}
-
-static void
-ipsec_if_tunnel_restack (ipsec_tunnel_if_t * it)
-{
-  fib_protocol_t proto;
-
-  /*
-   * walk all the adjacencies on the IPSec interface and restack them
-   */
-  FOR_EACH_FIB_IP_PROTOCOL (proto)
-  {
-    adj_nbr_walk (it->sw_if_index, proto, ipsec_if_adj_walk_cb, NULL);
-  }
-}
-
-static clib_error_t *
-ipsec_admin_up_down_function (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
-{
-  ipsec_main_t *im = &ipsec_main;
-  clib_error_t *err = 0;
-  ipsec_tunnel_if_t *t;
-  vnet_hw_interface_t *hi;
-  ipsec_sa_t *sa;
-
-  hi = vnet_get_hw_interface (vnm, hw_if_index);
-  t = pool_elt_at_index (im->tunnel_interfaces, hi->hw_instance);
-  t->flags = flags;
-
-  if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
-    {
-      sa = pool_elt_at_index (im->sad, t->input_sa_index);
-
-      err = ipsec_check_support_cb (im, sa);
-      if (err)
-	return err;
-
-      err = ipsec_add_del_sa_sess_cb (im, t->input_sa_index, 1);
-      if (err)
-	return err;
-
-      sa = pool_elt_at_index (im->sad, t->output_sa_index);
-
-      err = ipsec_check_support_cb (im, sa);
-      if (err)
-	return err;
-
-      err = ipsec_add_del_sa_sess_cb (im, t->output_sa_index, 1);
-      if (err)
-	return err;
-
-      vnet_hw_interface_set_flags (vnm, hw_if_index,
-				   VNET_HW_INTERFACE_FLAG_LINK_UP);
-    }
-  else
-    {
-      vnet_hw_interface_set_flags (vnm, hw_if_index, 0 /* down */ );
-      sa = pool_elt_at_index (im->sad, t->input_sa_index);
-      err = ipsec_add_del_sa_sess_cb (im, t->input_sa_index, 0);
-      if (err)
-	return err;
-      sa = pool_elt_at_index (im->sad, t->output_sa_index);
-      err = ipsec_add_del_sa_sess_cb (im, t->output_sa_index, 0);
-      if (err)
-	return err;
-    }
-
-  ipsec_if_tunnel_restack (t);
-
-  return (NULL);
-}
-
-static u8 *
-ipsec_if_build_rewrite (vnet_main_t * vnm,
-			u32 sw_if_index,
-			vnet_link_t link_type, const void *dst_address)
-{
-  return (NULL);
-}
-
-static void
-ipsec_if_update_adj (vnet_main_t * vnm, u32 sw_if_index, adj_index_t ai)
-{
-  adj_nbr_midchain_update_rewrite
-    (ai, NULL, NULL, ADJ_FLAG_MIDCHAIN_IP_STACK,
-     ipsec_if_build_rewrite (vnm, sw_if_index, adj_get_link_type (ai), NULL));
-
-  ipsec_if_tunnel_stack (ai);
-}
-
-/* *INDENT-OFF* */
-VNET_DEVICE_CLASS (ipsec_device_class) =
-{
-  .name = "IPSec",
-  .format_device_name = format_ipsec_name,
-  .admin_up_down_function = ipsec_admin_up_down_function,
-};
-/* *INDENT-ON* */
-
-/* *INDENT-OFF* */
-VNET_HW_INTERFACE_CLASS (ipsec_hw_class) =
-{
-  .name = "IPSec",
-  .build_rewrite = default_build_rewrite,
-  .update_adjacency = ipsec_if_update_adj,
-  .flags = VNET_HW_INTERFACE_CLASS_FLAG_P2P,
-};
-/* *INDENT-ON* */
-
-static int
-ipsec_add_del_tunnel_if_rpc_callback (ipsec_add_del_tunnel_args_t * a)
-{
-  vnet_main_t *vnm = vnet_get_main ();
-  ASSERT (vlib_get_thread_index () == 0);
-
-  return ipsec_add_del_tunnel_if_internal (vnm, a, NULL);
-}
-
-int
-ipsec_add_del_tunnel_if (ipsec_add_del_tunnel_args_t * args)
-{
-  vl_api_rpc_call_main_thread (ipsec_add_del_tunnel_if_rpc_callback,
-			       (u8 *) args, sizeof (*args));
-  return 0;
-}
-
-static u32
-ipsec_tun_mk_input_sa_id (u32 ti)
-{
-  return (0x80000000 | ti);
-}
-
-static u32
-ipsec_tun_mk_output_sa_id (u32 ti)
-{
-  return (0xc0000000 | ti);
-}
-
-static void
-ipsec_tunnel_feature_set (ipsec_main_t * im, ipsec_tunnel_if_t * t, u8 enable)
-{
-  u8 arc;
-  u32 esp4_feature_index, esp6_feature_index;
-  ipsec_sa_t *sa;
-
-  sa = ipsec_sa_get (t->output_sa_index);
-  if (sa->crypto_alg == IPSEC_CRYPTO_ALG_NONE &&
-      sa->integ_alg == IPSEC_INTEG_ALG_NONE)
-    {
-      esp4_feature_index = im->esp4_no_crypto_tun_feature_index;
-      esp6_feature_index = im->esp6_no_crypto_tun_feature_index;
-    }
-  else
-    {
-      esp4_feature_index = im->esp4_encrypt_tun_feature_index;
-      esp6_feature_index = im->esp6_encrypt_tun_feature_index;
-    }
-
-  arc = vnet_get_feature_arc_index ("ip4-output");
-
-  vnet_feature_enable_disable_with_index (arc, esp4_feature_index,
-					  t->sw_if_index, enable,
-					  &t->output_sa_index,
-					  sizeof (t->output_sa_index));
-
-  arc = vnet_get_feature_arc_index ("ip6-output");
-
-  vnet_feature_enable_disable_with_index (arc, esp6_feature_index,
-					  t->sw_if_index, enable,
-					  &t->output_sa_index,
-					  sizeof (t->output_sa_index));
-}
-
-int
-ipsec_add_del_tunnel_if_internal (vnet_main_t * vnm,
-				  ipsec_add_del_tunnel_args_t * args,
-				  u32 * sw_if_index_p)
-{
-  ipsec_tunnel_if_t *t;
-  ipsec_main_t *im = &ipsec_main;
-  vnet_hw_interface_t *hi = NULL;
-  u32 hw_if_index = ~0;
-  u32 sw_if_index = ~0;
-  uword *p;
-  u32 dev_instance;
-  ipsec_key_t crypto_key, integ_key;
-  ipsec_sa_flags_t flags;
-  int rv;
-  int is_ip6 = args->is_ip6;
-  ipsec4_tunnel_key_t key4;
-  ipsec6_tunnel_key_t key6;
-
-  if (!is_ip6)
-    {
-      key4.remote_ip.as_u32 = args->remote_ip.ip4.as_u32;
-      key4.spi = clib_host_to_net_u32 (args->remote_spi);
-      p = hash_get (im->ipsec4_if_pool_index_by_key, key4.as_u64);
-    }
-  else
-    {
-      key6.remote_ip = args->remote_ip.ip6;
-      key6.spi = clib_host_to_net_u32 (args->remote_spi);
-      p = hash_get_mem (im->ipsec6_if_pool_index_by_key, &key6);
-    }
-
-  if (args->is_add)
-    {
-      /* check if same src/dst pair exists */
-      if (p)
-	return VNET_API_ERROR_INVALID_VALUE;
-
-      pool_get_aligned_zero (im->tunnel_interfaces, t, CLIB_CACHE_LINE_BYTES);
-
-      dev_instance = t - im->tunnel_interfaces;
-      if (args->renumber)
-	t->show_instance = args->show_instance;
-      else
-	t->show_instance = dev_instance;
-
-      if (hash_get (im->ipsec_if_real_dev_by_show_dev, t->show_instance))
-	{
-	  pool_put (im->tunnel_interfaces, t);
-	  return VNET_API_ERROR_INSTANCE_IN_USE;
-	}
-
-      hash_set (im->ipsec_if_real_dev_by_show_dev, t->show_instance,
-		dev_instance);
-
-      flags = IPSEC_SA_FLAG_IS_TUNNEL;
-      if (args->is_ip6)
-	flags |= IPSEC_SA_FLAG_IS_TUNNEL_V6;
-      if (args->udp_encap)
-	flags |= IPSEC_SA_FLAG_UDP_ENCAP;
-      if (args->esn)
-	flags |= IPSEC_SA_FLAG_USE_ESN;
-      if (args->anti_replay)
-	flags |= IPSEC_SA_FLAG_USE_ANTI_REPLAY;
-
-      ipsec_mk_key (&crypto_key,
-		    args->remote_crypto_key, args->remote_crypto_key_len);
-      ipsec_mk_key (&integ_key,
-		    args->remote_integ_key, args->remote_integ_key_len);
-
-      rv = ipsec_sa_add_and_lock (ipsec_tun_mk_input_sa_id (dev_instance),
-				  args->remote_spi,
-				  IPSEC_PROTOCOL_ESP,
-				  args->crypto_alg,
-				  &crypto_key,
-				  args->integ_alg,
-				  &integ_key,
-				  (flags | IPSEC_SA_FLAG_IS_INBOUND),
-				  args->tx_table_id,
-				  args->salt,
-				  &args->remote_ip,
-				  &args->local_ip, &t->input_sa_index);
-
-      if (rv)
-	return rv;
-
-      ipsec_mk_key (&crypto_key,
-		    args->local_crypto_key, args->local_crypto_key_len);
-      ipsec_mk_key (&integ_key,
-		    args->local_integ_key, args->local_integ_key_len);
-
-      rv = ipsec_sa_add_and_lock (ipsec_tun_mk_output_sa_id (dev_instance),
-				  args->local_spi,
-				  IPSEC_PROTOCOL_ESP,
-				  args->crypto_alg,
-				  &crypto_key,
-				  args->integ_alg,
-				  &integ_key,
-				  flags,
-				  args->tx_table_id,
-				  args->salt,
-				  &args->local_ip,
-				  &args->remote_ip, &t->output_sa_index);
-
-      if (rv)
-	return rv;
-
-      /* copy the key */
-      if (is_ip6)
-	hash_set_mem_alloc (&im->ipsec6_if_pool_index_by_key, &key6,
-			    t - im->tunnel_interfaces);
-      else
-	hash_set (im->ipsec4_if_pool_index_by_key, key4.as_u64,
-		  t - im->tunnel_interfaces);
-
-      hw_if_index = vnet_register_interface (vnm, ipsec_device_class.index,
-					     t - im->tunnel_interfaces,
-					     ipsec_hw_class.index,
-					     t - im->tunnel_interfaces);
-
-      hi = vnet_get_hw_interface (vnm, hw_if_index);
-      sw_if_index = hi->sw_if_index;
-
-      t->hw_if_index = hw_if_index;
-      t->sw_if_index = hi->sw_if_index;
-
-      /* Standard default jumbo MTU. */
-      vnet_sw_interface_set_mtu (vnm, t->sw_if_index, 9000);
-
-      /* Add the new tunnel to the DB of tunnels per sw_if_index ... */
-      vec_validate_init_empty (im->ipsec_if_by_sw_if_index, t->sw_if_index,
-			       ~0);
-      im->ipsec_if_by_sw_if_index[t->sw_if_index] = dev_instance;
-
-      ipsec_tunnel_feature_set (im, t, 1);
-
-      /*1st interface, register protocol */
-      if (pool_elts (im->tunnel_interfaces) == 1)
-	{
-	  ip4_register_protocol (IP_PROTOCOL_IPSEC_ESP,
-				 ipsec4_if_input_node.index);
-	  ip6_register_protocol (IP_PROTOCOL_IPSEC_ESP,
-				 ipsec6_if_input_node.index);
-	}
-
-    }
-  else
-    {
-      u32 ti;
-
-      /* check if exists */
-      if (!p)
-	return VNET_API_ERROR_INVALID_VALUE;
-
-      ti = p[0];
-      t = pool_elt_at_index (im->tunnel_interfaces, ti);
-      hi = vnet_get_hw_interface (vnm, t->hw_if_index);
-      sw_if_index = hi->sw_if_index;
-
-      vnet_sw_interface_set_flags (vnm, hi->sw_if_index, 0);	/* admin down */
-
-      ipsec_tunnel_feature_set (im, t, 0);
-      vnet_delete_hw_interface (vnm, t->hw_if_index);
-
-      if (is_ip6)
-	hash_unset_mem_free (&im->ipsec6_if_pool_index_by_key, &key6);
-      else
-	hash_unset (im->ipsec4_if_pool_index_by_key, key4.as_u64);
-      hash_unset (im->ipsec_if_real_dev_by_show_dev, t->show_instance);
-
-      im->ipsec_if_by_sw_if_index[t->sw_if_index] = ~0;
-
-      /* delete input and output SA */
-      ipsec_sa_unlock (t->input_sa_index);
-      ipsec_sa_unlock (t->output_sa_index);
-
-      pool_put (im->tunnel_interfaces, t);
-    }
-
-  if (sw_if_index_p)
-    *sw_if_index_p = sw_if_index;
-
-  return 0;
-}
-
-int
-ipsec_set_interface_sa (vnet_main_t * vnm, u32 hw_if_index, u32 sa_id,
-			u8 is_outbound)
-{
-  ipsec_main_t *im = &ipsec_main;
-  vnet_hw_interface_t *hi;
-  ipsec_tunnel_if_t *t;
-  ipsec_sa_t *sa, *old_sa;
-  u32 sa_index, old_sa_index;
-  uword *p;
-
-  hi = vnet_get_hw_interface (vnm, hw_if_index);
-  t = pool_elt_at_index (im->tunnel_interfaces, hi->dev_instance);
-
-  sa_index = ipsec_sa_find_and_lock (sa_id);
-
-  if (INDEX_INVALID == sa_index)
-    {
-      clib_warning ("SA with ID %u not found", sa_id);
-      return VNET_API_ERROR_NO_SUCH_ENTRY;
-    }
-
-  sa = pool_elt_at_index (im->sad, sa_index);
-
-  if (!is_outbound)
-    {
-      old_sa_index = t->input_sa_index;
-      old_sa = pool_elt_at_index (im->sad, old_sa_index);
-
-      if (ipsec_sa_is_set_IS_TUNNEL_V6 (sa) ^
-	  ipsec_sa_is_set_IS_TUNNEL_V6 (old_sa))
-	{
-	  clib_warning ("IPsec interface SA endpoints type can't be changed");
-	  return VNET_API_ERROR_INVALID_VALUE;
-	}
-
-      if (ipsec_sa_is_set_IS_TUNNEL_V6 (sa))
-	{
-	  ipsec6_tunnel_key_t key;
-
-	  /* unset old inbound hash entry. packets should stop arriving */
-	  key.remote_ip = old_sa->tunnel_src_addr.ip6;
-	  key.spi = clib_host_to_net_u32 (old_sa->spi);
-
-	  p = hash_get_mem (im->ipsec6_if_pool_index_by_key, &key);
-	  if (p)
-	    hash_unset_mem_free (&im->ipsec6_if_pool_index_by_key, &key);
-
-	  /* set new inbound SA, then set new hash entry */
-	  t->input_sa_index = sa_index;
-	  key.remote_ip = sa->tunnel_src_addr.ip6;
-	  key.spi = clib_host_to_net_u32 (sa->spi);
-
-	  hash_set_mem_alloc (&im->ipsec6_if_pool_index_by_key, &key,
-			      hi->dev_instance);
-	}
-      else
-	{
-	  ipsec4_tunnel_key_t key;
-
-	  /* unset old inbound hash entry. packets should stop arriving */
-	  key.remote_ip.as_u32 = old_sa->tunnel_src_addr.ip4.as_u32;
-	  key.spi = clib_host_to_net_u32 (old_sa->spi);
-
-	  p = hash_get (im->ipsec4_if_pool_index_by_key, key.as_u64);
-	  if (p)
-	    hash_unset (im->ipsec4_if_pool_index_by_key, key.as_u64);
-
-	  /* set new inbound SA, then set new hash entry */
-	  t->input_sa_index = sa_index;
-	  key.remote_ip.as_u32 = sa->tunnel_src_addr.ip4.as_u32;
-	  key.spi = clib_host_to_net_u32 (sa->spi);
-
-	  hash_set (im->ipsec4_if_pool_index_by_key, key.as_u64,
-		    hi->dev_instance);
-	}
-    }
-  else
-    {
-      old_sa_index = t->output_sa_index;
-      old_sa = pool_elt_at_index (im->sad, old_sa_index);
-
-      if (ipsec_sa_is_set_IS_TUNNEL_V6 (sa) ^
-	  ipsec_sa_is_set_IS_TUNNEL_V6 (old_sa))
-	{
-	  clib_warning ("IPsec interface SA endpoints type can't be changed");
-	  return VNET_API_ERROR_INVALID_VALUE;
-	}
-
-      /*
-       * re-enable the feature to get the new SA in
-       * the workers are stopped so no packets are sent in the clear
-       */
-      ipsec_tunnel_feature_set (im, t, 0);
-      t->output_sa_index = sa_index;
-      ipsec_tunnel_feature_set (im, t, 1);
-    }
-
-  /* remove sa_id to sa_index mapping on old SA */
-  hash_unset (im->sa_index_by_sa_id, old_sa->id);
-
-  if (ipsec_add_del_sa_sess_cb (im, old_sa_index, 0))
-    {
-      clib_warning ("IPsec backend add/del callback returned error");
-      return VNET_API_ERROR_SYSCALL_ERROR_1;
-    }
-
-  ipsec_sa_unlock (old_sa_index);
-
-  return 0;
-}
-
-clib_error_t *
-ipsec_tunnel_if_init (vlib_main_t * vm)
-{
-  ipsec_main_t *im = &ipsec_main;
-
-  /* initialize the ipsec-if ip4 hash */
-  im->ipsec4_if_pool_index_by_key =
-    hash_create (0, sizeof (ipsec4_tunnel_key_t));
-  /* initialize the ipsec-if ip6 hash */
-  im->ipsec6_if_pool_index_by_key = hash_create_mem (0,
-						     sizeof
-						     (ipsec6_tunnel_key_t),
-						     sizeof (uword));
-  im->ipsec_if_real_dev_by_show_dev = hash_create (0, sizeof (uword));
-
-  /* set up feature nodes to drop outbound packets with no crypto alg set */
-  ipsec_add_feature ("ip4-output", "esp4-no-crypto",
-		     &im->esp4_no_crypto_tun_feature_index);
-  ipsec_add_feature ("ip6-output", "esp6-no-crypto",
-		     &im->esp6_no_crypto_tun_feature_index);
-
-  udp_register_dst_port (vlib_get_main (),
-			 UDP_DST_PORT_ipsec, ipsec4_if_input_node.index, 1);
-  return 0;
-}
-
-VLIB_INIT_FUNCTION (ipsec_tunnel_if_init);
-
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */