IKEv2 to plugin

for easy integration with ptoducts running their own Ike stack.
Without the VPP IKE plugin loaded, the product is free to handle
IKE packets as it pleases.

Change-Id: Id0839f4d58b797f4c2da0382eb499fc08b05f66f
Signed-off-by: Neale Ranns <nranns@cisco.com>

1 files changed, 3487 insertions, 0 deletions

diff --git a/src/plugins/ikev2/ikev2.c b/src/plugins/ikev2/ikev2.c
new file mode 100644
index 00000000000..929f97716d3
--- /dev/null
+++ b/src/plugins/ikev2/ikev2.c
@@ -0,0 +1,3487 @@
+/*
+ * 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 <vlib/vlib.h>
+#include <vlib/unix/plugin.h>
+#include <vpp/app/version.h>
+#include <vnet/vnet.h>
+#include <vnet/pg/pg.h>
+#include <vppinfra/error.h>
+#include <vppinfra/random.h>
+#include <vnet/udp/udp.h>
+#include <vnet/ipsec/ipsec.h>
+#include <plugins/ikev2/ikev2.h>
+#include <plugins/ikev2/ikev2_priv.h>
+#include <openssl/sha.h>
+
+ikev2_main_t ikev2_main;
+
+static int ikev2_delete_tunnel_interface (vnet_main_t * vnm,
+					  ikev2_sa_t * sa,
+					  ikev2_child_sa_t * child);
+
+#define ikev2_set_state(sa, v) do { \
+    (sa)->state = v; \
+    clib_warning("sa state changed to " #v); \
+  } while(0);
+
+typedef struct
+{
+  u32 next_index;
+  u32 sw_if_index;
+} ikev2_trace_t;
+
+static u8 *
+format_ikev2_trace (u8 * s, va_list * args)
+{
+  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
+  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
+  ikev2_trace_t *t = va_arg (*args, ikev2_trace_t *);
+
+  s = format (s, "ikev2: sw_if_index %d, next index %d",
+	      t->sw_if_index, t->next_index);
+  return s;
+}
+
+static vlib_node_registration_t ikev2_node;
+
+#define foreach_ikev2_error \
+_(PROCESSED, "IKEv2 packets processed") \
+_(IKE_SA_INIT_RETRANSMIT, "IKE_SA_INIT retransmit ") \
+_(IKE_SA_INIT_IGNORE, "IKE_SA_INIT ignore (IKE SA already auth)") \
+_(IKE_REQ_RETRANSMIT, "IKE request retransmit") \
+_(IKE_REQ_IGNORE, "IKE request ignore (old msgid)") \
+_(NOT_IKEV2, "Non IKEv2 packets received")
+
+typedef enum
+{
+#define _(sym,str) IKEV2_ERROR_##sym,
+  foreach_ikev2_error
+#undef _
+    IKEV2_N_ERROR,
+} ikev2_error_t;
+
+static char *ikev2_error_strings[] = {
+#define _(sym,string) string,
+  foreach_ikev2_error
+#undef _
+};
+
+typedef enum
+{
+  IKEV2_NEXT_IP4_LOOKUP,
+  IKEV2_NEXT_ERROR_DROP,
+  IKEV2_N_NEXT,
+} ikev2_next_t;
+
+static ikev2_sa_transform_t *
+ikev2_find_transform_data (ikev2_sa_transform_t * t)
+{
+  ikev2_main_t *km = &ikev2_main;
+  ikev2_sa_transform_t *td;
+
+  vec_foreach (td, km->supported_transforms)
+  {
+    if (td->type != t->type)
+      continue;
+
+    if (td->transform_id != t->transform_id)
+      continue;
+
+    if (td->type == IKEV2_TRANSFORM_TYPE_ENCR)
+      {
+	if (vec_len (t->attrs) != 4 || t->attrs[0] != 0x80
+	    || t->attrs[1] != 14)
+	  continue;
+
+	if (((t->attrs[2] << 8 | t->attrs[3]) / 8) != td->key_len)
+	  continue;
+      }
+    return td;
+  }
+  return 0;
+}
+
+static ikev2_sa_proposal_t *
+ikev2_select_proposal (ikev2_sa_proposal_t * proposals,
+		       ikev2_protocol_id_t prot_id)
+{
+  ikev2_sa_proposal_t *rv = 0;
+  ikev2_sa_proposal_t *proposal;
+  ikev2_sa_transform_t *transform, *new_t;
+  u8 mandatory_bitmap, optional_bitmap;
+
+  if (prot_id == IKEV2_PROTOCOL_IKE)
+    {
+      mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
+	(1 << IKEV2_TRANSFORM_TYPE_PRF) |
+	(1 << IKEV2_TRANSFORM_TYPE_INTEG) | (1 << IKEV2_TRANSFORM_TYPE_DH);
+      optional_bitmap = mandatory_bitmap;
+    }
+  else if (prot_id == IKEV2_PROTOCOL_ESP)
+    {
+      mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_ENCR) |
+	(1 << IKEV2_TRANSFORM_TYPE_ESN);
+      optional_bitmap = mandatory_bitmap |
+	(1 << IKEV2_TRANSFORM_TYPE_INTEG) | (1 << IKEV2_TRANSFORM_TYPE_DH);
+    }
+  else if (prot_id == IKEV2_PROTOCOL_AH)
+    {
+      mandatory_bitmap = (1 << IKEV2_TRANSFORM_TYPE_INTEG) |
+	(1 << IKEV2_TRANSFORM_TYPE_ESN);
+      optional_bitmap = mandatory_bitmap | (1 << IKEV2_TRANSFORM_TYPE_DH);
+    }
+  else
+    return 0;
+
+  vec_add2 (rv, proposal, 1);
+
+  vec_foreach (proposal, proposals)
+  {
+    u8 bitmap = 0;
+    if (proposal->protocol_id != prot_id)
+      continue;
+
+    vec_foreach (transform, proposal->transforms)
+    {
+      if ((1 << transform->type) & bitmap)
+	continue;
+
+      if (ikev2_find_transform_data (transform))
+	{
+	  bitmap |= 1 << transform->type;
+	  vec_add2 (rv->transforms, new_t, 1);
+	  clib_memcpy_fast (new_t, transform, sizeof (*new_t));
+	  new_t->attrs = vec_dup (transform->attrs);
+	}
+    }
+
+    clib_warning ("bitmap is %x mandatory is %x optional is %x",
+		  bitmap, mandatory_bitmap, optional_bitmap);
+
+    if ((bitmap & mandatory_bitmap) == mandatory_bitmap &&
+	(bitmap & ~optional_bitmap) == 0)
+      {
+	rv->proposal_num = proposal->proposal_num;
+	rv->protocol_id = proposal->protocol_id;
+	RAND_bytes ((u8 *) & rv->spi, sizeof (rv->spi));
+	goto done;
+      }
+    else
+      {
+	vec_free (rv->transforms);
+      }
+  }
+
+  vec_free (rv);
+done:
+  return rv;
+}
+
+ikev2_sa_transform_t *
+ikev2_sa_get_td_for_type (ikev2_sa_proposal_t * p,
+			  ikev2_transform_type_t type)
+{
+  ikev2_sa_transform_t *t;
+
+  if (!p)
+    return 0;
+
+  vec_foreach (t, p->transforms)
+  {
+    if (t->type == type)
+      return ikev2_find_transform_data (t);
+  }
+  return 0;
+}
+
+ikev2_child_sa_t *
+ikev2_sa_get_child (ikev2_sa_t * sa, u32 spi, ikev2_protocol_id_t prot_id,
+		    int by_initiator)
+{
+  ikev2_child_sa_t *c;
+  vec_foreach (c, sa->childs)
+  {
+    ikev2_sa_proposal_t *proposal =
+      by_initiator ? &c->i_proposals[0] : &c->r_proposals[0];
+    if (proposal && proposal->spi == spi && proposal->protocol_id == prot_id)
+      return c;
+  }
+
+  return 0;
+}
+
+void
+ikev2_sa_free_proposal_vector (ikev2_sa_proposal_t ** v)
+{
+  ikev2_sa_proposal_t *p;
+  ikev2_sa_transform_t *t;
+
+  if (!*v)
+    return;
+
+  vec_foreach (p, *v)
+  {
+    vec_foreach (t, p->transforms)
+    {
+      vec_free (t->attrs);
+    }
+    vec_free (p->transforms);
+  }
+  vec_free (*v);
+};
+
+static void
+ikev2_sa_free_all_child_sa (ikev2_child_sa_t ** childs)
+{
+  ikev2_child_sa_t *c;
+  vec_foreach (c, *childs)
+  {
+    ikev2_sa_free_proposal_vector (&c->r_proposals);
+    ikev2_sa_free_proposal_vector (&c->i_proposals);
+    vec_free (c->sk_ai);
+    vec_free (c->sk_ar);
+    vec_free (c->sk_ei);
+    vec_free (c->sk_er);
+  }
+
+  vec_free (*childs);
+}
+
+static void
+ikev2_sa_del_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * child)
+{
+  ikev2_sa_free_proposal_vector (&child->r_proposals);
+  ikev2_sa_free_proposal_vector (&child->i_proposals);
+  vec_free (child->sk_ai);
+  vec_free (child->sk_ar);
+  vec_free (child->sk_ei);
+  vec_free (child->sk_er);
+
+  vec_del1 (sa->childs, child - sa->childs);
+}
+
+static void
+ikev2_sa_free_all_vec (ikev2_sa_t * sa)
+{
+  vec_free (sa->i_nonce);
+  vec_free (sa->i_dh_data);
+  vec_free (sa->dh_shared_key);
+  vec_free (sa->dh_private_key);
+
+  ikev2_sa_free_proposal_vector (&sa->r_proposals);
+  ikev2_sa_free_proposal_vector (&sa->i_proposals);
+
+  vec_free (sa->sk_d);
+  vec_free (sa->sk_ai);
+  vec_free (sa->sk_ar);
+  vec_free (sa->sk_ei);
+  vec_free (sa->sk_er);
+  vec_free (sa->sk_pi);
+  vec_free (sa->sk_pr);
+
+  vec_free (sa->i_id.data);
+  vec_free (sa->i_auth.data);
+  vec_free (sa->r_id.data);
+  vec_free (sa->r_auth.data);
+  if (sa->r_auth.key)
+    EVP_PKEY_free (sa->r_auth.key);
+
+  vec_free (sa->del);
+
+  ikev2_sa_free_all_child_sa (&sa->childs);
+}
+
+static void
+ikev2_delete_sa (ikev2_sa_t * sa)
+{
+  ikev2_main_t *km = &ikev2_main;
+  u32 thread_index = vlib_get_thread_index ();
+  uword *p;
+
+  ikev2_sa_free_all_vec (sa);
+
+  p = hash_get (km->per_thread_data[thread_index].sa_by_rspi, sa->rspi);
+  if (p)
+    {
+      hash_unset (km->per_thread_data[thread_index].sa_by_rspi, sa->rspi);
+      pool_put (km->per_thread_data[thread_index].sas, sa);
+    }
+}
+
+static void
+ikev2_generate_sa_init_data (ikev2_sa_t * sa)
+{
+  ikev2_sa_transform_t *t = 0, *t2;
+  ikev2_main_t *km = &ikev2_main;
+
+  if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
+    {
+      return;
+    }
+
+  /* check if received DH group is on our list of supported groups */
+  vec_foreach (t2, km->supported_transforms)
+  {
+    if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
+      {
+	t = t2;
+	break;
+      }
+  }
+
+  if (!t)
+    {
+      clib_warning ("unknown dh data group %u (data len %u)", sa->dh_group,
+		    vec_len (sa->i_dh_data));
+      sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
+      return;
+    }
+
+  if (sa->is_initiator)
+    {
+      /* generate rspi */
+      RAND_bytes ((u8 *) & sa->ispi, 8);
+
+      /* generate nonce */
+      sa->i_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
+      RAND_bytes ((u8 *) sa->i_nonce, IKEV2_NONCE_SIZE);
+    }
+  else
+    {
+      /* generate rspi */
+      RAND_bytes ((u8 *) & sa->rspi, 8);
+
+      /* generate nonce */
+      sa->r_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
+      RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
+    }
+
+  /* generate dh keys */
+  ikev2_generate_dh (sa, t);
+
+}
+
+static void
+ikev2_complete_sa_data (ikev2_sa_t * sa, ikev2_sa_t * sai)
+{
+  ikev2_sa_transform_t *t = 0, *t2;
+  ikev2_main_t *km = &ikev2_main;
+
+
+  /*move some data to the new SA */
+#define _(A) ({void* __tmp__ = (A); (A) = 0; __tmp__;})
+  sa->i_nonce = _(sai->i_nonce);
+  sa->i_dh_data = _(sai->i_dh_data);
+  sa->dh_private_key = _(sai->dh_private_key);
+  sa->iaddr.as_u32 = sai->iaddr.as_u32;
+  sa->raddr.as_u32 = sai->raddr.as_u32;
+  sa->is_initiator = sai->is_initiator;
+  sa->profile = sai->profile;
+  sa->i_id.type = sai->i_id.type;
+  sa->i_id.data = _(sai->i_id.data);
+  sa->i_auth.method = sai->i_auth.method;
+  sa->i_auth.hex = sai->i_auth.hex;
+  sa->i_auth.data = _(sai->i_auth.data);
+  sa->i_auth.key = _(sai->i_auth.key);
+  sa->last_sa_init_req_packet_data = _(sai->last_sa_init_req_packet_data);
+  sa->childs = _(sai->childs);
+#undef _
+
+
+  if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
+    {
+      return;
+    }
+
+  /* check if received DH group is on our list of supported groups */
+  vec_foreach (t2, km->supported_transforms)
+  {
+    if (t2->type == IKEV2_TRANSFORM_TYPE_DH && sa->dh_group == t2->dh_type)
+      {
+	t = t2;
+	break;
+      }
+  }
+
+  if (!t)
+    {
+      clib_warning ("unknown dh data group %u (data len %u)", sa->dh_group,
+		    vec_len (sa->i_dh_data));
+      sa->dh_group = IKEV2_TRANSFORM_DH_TYPE_NONE;
+      return;
+    }
+
+
+  /* generate dh keys */
+  ikev2_complete_dh (sa, t);
+
+}
+
+static void
+ikev2_calc_keys (ikev2_sa_t * sa)
+{
+  u8 *tmp;
+  /* calculate SKEYSEED = prf(Ni | Nr, g^ir) */
+  u8 *skeyseed = 0;
+  u8 *s = 0;
+  ikev2_sa_transform_t *tr_encr, *tr_prf, *tr_integ;
+  tr_encr =
+    ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
+  tr_prf =
+    ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
+  tr_integ =
+    ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
+
+  vec_append (s, sa->i_nonce);
+  vec_append (s, sa->r_nonce);
+  skeyseed = ikev2_calc_prf (tr_prf, s, sa->dh_shared_key);
+
+  /* Calculate S = Ni | Nr | SPIi | SPIr */
+  u64 *spi;
+  vec_add2 (s, tmp, 2 * sizeof (*spi));
+  spi = (u64 *) tmp;
+  spi[0] = clib_host_to_net_u64 (sa->ispi);
+  spi[1] = clib_host_to_net_u64 (sa->rspi);
+
+  /* calculate PRFplus */
+  u8 *keymat;
+  int len = tr_prf->key_trunc +	/* SK_d */
+    tr_integ->key_len * 2 +	/* SK_ai, SK_ar */
+    tr_encr->key_len * 2 +	/* SK_ei, SK_er */
+    tr_prf->key_len * 2;	/* SK_pi, SK_pr */
+
+  keymat = ikev2_calc_prfplus (tr_prf, skeyseed, s, len);
+  vec_free (skeyseed);
+  vec_free (s);
+
+  int pos = 0;
+
+  /* SK_d */
+  sa->sk_d = vec_new (u8, tr_prf->key_trunc);
+  clib_memcpy_fast (sa->sk_d, keymat + pos, tr_prf->key_trunc);
+  pos += tr_prf->key_trunc;
+
+  /* SK_ai */
+  sa->sk_ai = vec_new (u8, tr_integ->key_len);
+  clib_memcpy_fast (sa->sk_ai, keymat + pos, tr_integ->key_len);
+  pos += tr_integ->key_len;
+
+  /* SK_ar */
+  sa->sk_ar = vec_new (u8, tr_integ->key_len);
+  clib_memcpy_fast (sa->sk_ar, keymat + pos, tr_integ->key_len);
+  pos += tr_integ->key_len;
+
+  /* SK_ei */
+  sa->sk_ei = vec_new (u8, tr_encr->key_len);
+  clib_memcpy_fast (sa->sk_ei, keymat + pos, tr_encr->key_len);
+  pos += tr_encr->key_len;
+
+  /* SK_er */
+  sa->sk_er = vec_new (u8, tr_encr->key_len);
+  clib_memcpy_fast (sa->sk_er, keymat + pos, tr_encr->key_len);
+  pos += tr_encr->key_len;
+
+  /* SK_pi */
+  sa->sk_pi = vec_new (u8, tr_prf->key_len);
+  clib_memcpy_fast (sa->sk_pi, keymat + pos, tr_prf->key_len);
+  pos += tr_prf->key_len;
+
+  /* SK_pr */
+  sa->sk_pr = vec_new (u8, tr_prf->key_len);
+  clib_memcpy_fast (sa->sk_pr, keymat + pos, tr_prf->key_len);
+  pos += tr_prf->key_len;
+
+  vec_free (keymat);
+}
+
+static void
+ikev2_calc_child_keys (ikev2_sa_t * sa, ikev2_child_sa_t * child)
+{
+  u8 *s = 0;
+  ikev2_sa_transform_t *tr_prf, *ctr_encr, *ctr_integ;
+  tr_prf =
+    ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
+  ctr_encr =
+    ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
+  ctr_integ =
+    ikev2_sa_get_td_for_type (child->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
+
+  vec_append (s, sa->i_nonce);
+  vec_append (s, sa->r_nonce);
+  /* calculate PRFplus */
+  u8 *keymat;
+  int len = ctr_encr->key_len * 2 + ctr_integ->key_len * 2;
+
+  keymat = ikev2_calc_prfplus (tr_prf, sa->sk_d, s, len);
+
+  int pos = 0;
+
+  /* SK_ei */
+  child->sk_ei = vec_new (u8, ctr_encr->key_len);
+  clib_memcpy_fast (child->sk_ei, keymat + pos, ctr_encr->key_len);
+  pos += ctr_encr->key_len;
+
+  /* SK_ai */
+  child->sk_ai = vec_new (u8, ctr_integ->key_len);
+  clib_memcpy_fast (child->sk_ai, keymat + pos, ctr_integ->key_len);
+  pos += ctr_integ->key_len;
+
+  /* SK_er */
+  child->sk_er = vec_new (u8, ctr_encr->key_len);
+  clib_memcpy_fast (child->sk_er, keymat + pos, ctr_encr->key_len);
+  pos += ctr_encr->key_len;
+
+  /* SK_ar */
+  child->sk_ar = vec_new (u8, ctr_integ->key_len);
+  clib_memcpy_fast (child->sk_ar, keymat + pos, ctr_integ->key_len);
+  pos += ctr_integ->key_len;
+
+  ASSERT (pos == len);
+
+  vec_free (keymat);
+}
+
+static void
+ikev2_process_sa_init_req (vlib_main_t * vm, ikev2_sa_t * sa,
+			   ike_header_t * ike)
+{
+  int p = 0;
+  u32 len = clib_net_to_host_u32 (ike->length);
+  u8 payload = ike->nextpayload;
+
+  clib_warning ("ispi %lx rspi %lx nextpayload %x version %x "
+		"exchange %x flags %x msgid %x length %u",
+		clib_net_to_host_u64 (ike->ispi),
+		clib_net_to_host_u64 (ike->rspi),
+		payload, ike->version,
+		ike->exchange, ike->flags,
+		clib_net_to_host_u32 (ike->msgid), len);
+
+  sa->ispi = clib_net_to_host_u64 (ike->ispi);
+
+  /* store whole IKE payload - needed for PSK auth */
+  vec_free (sa->last_sa_init_req_packet_data);
+  vec_add (sa->last_sa_init_req_packet_data, ike, len);
+
+  while (p < len && payload != IKEV2_PAYLOAD_NONE)
+    {
+      ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p];
+      u32 plen = clib_net_to_host_u16 (ikep->length);
+
+      if (plen < sizeof (ike_payload_header_t))
+	return;
+
+      if (payload == IKEV2_PAYLOAD_SA)
+	{
+	  ikev2_sa_free_proposal_vector (&sa->i_proposals);
+	  sa->i_proposals = ikev2_parse_sa_payload (ikep);
+	}
+      else if (payload == IKEV2_PAYLOAD_KE)
+	{
+	  ike_ke_payload_header_t *ke = (ike_ke_payload_header_t *) ikep;
+	  sa->dh_group = clib_net_to_host_u16 (ke->dh_group);
+	  vec_free (sa->i_dh_data);
+	  vec_add (sa->i_dh_data, ke->payload, plen - sizeof (*ke));
+	}
+      else if (payload == IKEV2_PAYLOAD_NONCE)
+	{
+	  vec_free (sa->i_nonce);
+	  vec_add (sa->i_nonce, ikep->payload, plen - sizeof (*ikep));
+	}
+      else if (payload == IKEV2_PAYLOAD_NOTIFY)
+	{
+	  ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
+	  vec_free (n);
+	}
+      else if (payload == IKEV2_PAYLOAD_VENDOR)
+	{
+	  ikev2_parse_vendor_payload (ikep);
+	}
+      else
+	{
+	  clib_warning ("unknown payload %u flags %x length %u", payload,
+			ikep->flags, plen);
+	  if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
+	    {
+	      ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
+	      sa->unsupported_cp = payload;
+	      return;
+	    }
+	}
+
+      payload = ikep->nextpayload;
+      p += plen;
+    }
+
+  ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
+}
+
+static void
+ikev2_process_sa_init_resp (vlib_main_t * vm, ikev2_sa_t * sa,
+			    ike_header_t * ike)
+{
+  int p = 0;
+  u32 len = clib_net_to_host_u32 (ike->length);
+  u8 payload = ike->nextpayload;
+
+  clib_warning ("ispi %lx rspi %lx nextpayload %x version %x "
+		"exchange %x flags %x msgid %x length %u",
+		clib_net_to_host_u64 (ike->ispi),
+		clib_net_to_host_u64 (ike->rspi),
+		payload, ike->version,
+		ike->exchange, ike->flags,
+		clib_net_to_host_u32 (ike->msgid), len);
+
+  sa->ispi = clib_net_to_host_u64 (ike->ispi);
+  sa->rspi = clib_net_to_host_u64 (ike->rspi);
+
+  /* store whole IKE payload - needed for PSK auth */
+  vec_free (sa->last_sa_init_res_packet_data);
+  vec_add (sa->last_sa_init_res_packet_data, ike, len);
+
+  while (p < len && payload != IKEV2_PAYLOAD_NONE)
+    {
+      ike_payload_header_t *ikep = (ike_payload_header_t *) & ike->payload[p];
+      u32 plen = clib_net_to_host_u16 (ikep->length);
+
+      if (plen < sizeof (ike_payload_header_t))
+	return;
+
+      if (payload == IKEV2_PAYLOAD_SA)
+	{
+	  ikev2_sa_free_proposal_vector (&sa->r_proposals);
+	  sa->r_proposals = ikev2_parse_sa_payload (ikep);
+	  if (sa->r_proposals)
+	    {
+	      ikev2_set_state (sa, IKEV2_STATE_SA_INIT);
+	      ike->msgid =
+		clib_host_to_net_u32 (clib_net_to_host_u32 (ike->msgid) + 1);
+	    }
+	}
+      else if (payload == IKEV2_PAYLOAD_KE)
+	{
+	  ike_ke_payload_header_t *ke = (ike_ke_payload_header_t *) ikep;
+	  sa->dh_group = clib_net_to_host_u16 (ke->dh_group);
+	  vec_free (sa->r_dh_data);
+	  vec_add (sa->r_dh_data, ke->payload, plen - sizeof (*ke));
+	}
+      else if (payload == IKEV2_PAYLOAD_NONCE)
+	{
+	  vec_free (sa->r_nonce);
+	  vec_add (sa->r_nonce, ikep->payload, plen - sizeof (*ikep));
+	}
+      else if (payload == IKEV2_PAYLOAD_NOTIFY)
+	{
+	  ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
+	  vec_free (n);
+	}
+      else if (payload == IKEV2_PAYLOAD_VENDOR)
+	{
+	  ikev2_parse_vendor_payload (ikep);
+	}
+      else
+	{
+	  clib_warning ("unknown payload %u flags %x length %u", payload,
+			ikep->flags, plen);
+	  if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
+	    {
+	      ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
+	      sa->unsupported_cp = payload;
+	      return;
+	    }
+	}
+
+      payload = ikep->nextpayload;
+      p += plen;
+    }
+}
+
+static u8 *
+ikev2_decrypt_sk_payload (ikev2_sa_t * sa, ike_header_t * ike, u8 * payload)
+{
+  int p = 0;
+  u8 last_payload = 0;
+  u8 *hmac = 0;
+  u32 len = clib_net_to_host_u32 (ike->length);
+  ike_payload_header_t *ikep = 0;
+  u32 plen = 0;
+  ikev2_sa_transform_t *tr_integ;
+  tr_integ =
+    ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
+
+  while (p < len &&
+	 *payload != IKEV2_PAYLOAD_NONE && last_payload != IKEV2_PAYLOAD_SK)
+    {
+      ikep = (ike_payload_header_t *) & ike->payload[p];
+      plen = clib_net_to_host_u16 (ikep->length);
+
+      if (plen < sizeof (*ikep))
+	return 0;
+
+      if (*payload == IKEV2_PAYLOAD_SK)
+	{
+	  clib_warning ("received IKEv2 payload SK, len %u", plen - 4);
+	  last_payload = *payload;
+	}
+      else
+	{
+	  clib_warning ("unknown payload %u flags %x length %u", payload,
+			ikep->flags, plen);
+	  if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
+	    {
+	      sa->unsupported_cp = *payload;
+	      return 0;
+	    }
+	}
+
+      *payload = ikep->nextpayload;
+      p += plen;
+    }
+
+  if (last_payload != IKEV2_PAYLOAD_SK)
+    {
+      clib_warning ("Last payload must be SK");
+      return 0;
+    }
+
+  hmac =
+    ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ar : sa->sk_ai,
+		       (u8 *) ike, len - tr_integ->key_trunc);
+
+  plen = plen - sizeof (*ikep) - tr_integ->key_trunc;
+
+  if (memcmp (hmac, &ikep->payload[plen], tr_integ->key_trunc))
+    {
+      clib_warning ("message integrity check failed");
+      vec_free (hmac);
+      return 0;
+    }
+  vec_free (hmac);
+
+  return ikev2_decrypt_data (sa, ikep->payload, plen);
+}
+
+static void
+ikev2_initial_contact_cleanup (ikev2_sa_t * sa)
+{
+  ikev2_main_t *km = &ikev2_main;
+  ikev2_sa_t *tmp;
+  u32 i, *delete = 0;
+  ikev2_child_sa_t *c;
+  u32 thread_index = vlib_get_thread_index ();
+
+  if (!sa->initial_contact)
+    return;
+
+  /* find old IKE SAs with the same authenticated identity */
+  /* *INDENT-OFF* */
+  pool_foreach (tmp, km->per_thread_data[thread_index].sas, ({
+        if (tmp->i_id.type != sa->i_id.type ||
+            vec_len(tmp->i_id.data) != vec_len(sa->i_id.data) ||
+            memcmp(sa->i_id.data, tmp->i_id.data, vec_len(sa->i_id.data)))
+          continue;
+
+        if (sa->rspi != tmp->rspi)
+          vec_add1(delete, tmp - km->per_thread_data[thread_index].sas);
+  }));
+  /* *INDENT-ON* */
+
+  for (i = 0; i < vec_len (delete); i++)
+    {
+      tmp =
+	pool_elt_at_index (km->per_thread_data[thread_index].sas, delete[i]);
+      vec_foreach (c,
+		   tmp->childs) ikev2_delete_tunnel_interface (km->vnet_main,
+							       tmp, c);
+      ikev2_delete_sa (tmp);
+    }
+
+  vec_free (delete);
+  sa->initial_contact = 0;
+}
+
+static void
+ikev2_process_auth_req (vlib_main_t * vm, ikev2_sa_t * sa, ike_header_t * ike)
+{
+  ikev2_child_sa_t *first_child_sa;
+  int p = 0;
+  u32 len = clib_net_to_host_u32 (ike->length);
+  u8 payload = ike->nextpayload;
+  u8 *plaintext = 0;
+
+  ike_payload_header_t *ikep;
+  u32 plen;
+
+  clib_warning ("ispi %lx rspi %lx nextpayload %x version %x "
+		"exchange %x flags %x msgid %x length %u",
+		clib_net_to_host_u64 (ike->ispi),
+		clib_net_to_host_u64 (ike->rspi),
+		payload, ike->version,
+		ike->exchange, ike->flags,
+		clib_net_to_host_u32 (ike->msgid), len);
+
+  ikev2_calc_keys (sa);
+
+  plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
+
+  if (!plaintext)
+    {
+      if (sa->unsupported_cp)
+	ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
+      goto cleanup_and_exit;
+    }
+
+  /* select or create 1st child SA */
+  if (sa->is_initiator)
+    {
+      first_child_sa = &sa->childs[0];
+    }
+  else
+    {
+      ikev2_sa_free_all_child_sa (&sa->childs);
+      vec_add2 (sa->childs, first_child_sa, 1);
+    }
+
+
+  /* process encrypted payload */
+  p = 0;
+  while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
+    {
+      ikep = (ike_payload_header_t *) & plaintext[p];
+      plen = clib_net_to_host_u16 (ikep->length);
+
+      if (plen < sizeof (ike_payload_header_t))
+	goto cleanup_and_exit;
+
+      if (payload == IKEV2_PAYLOAD_SA)	/* 33 */
+	{
+	  clib_warning ("received payload SA, len %u", plen - sizeof (*ikep));
+	  if (sa->is_initiator)
+	    {
+	      ikev2_sa_free_proposal_vector (&first_child_sa->r_proposals);
+	      first_child_sa->r_proposals = ikev2_parse_sa_payload (ikep);
+	    }
+	  else
+	    {
+	      ikev2_sa_free_proposal_vector (&first_child_sa->i_proposals);
+	      first_child_sa->i_proposals = ikev2_parse_sa_payload (ikep);
+	    }
+	}
+      else if (payload == IKEV2_PAYLOAD_IDI)	/* 35 */
+	{
+	  ike_id_payload_header_t *id = (ike_id_payload_header_t *) ikep;
+
+	  sa->i_id.type = id->id_type;
+	  vec_free (sa->i_id.data);
+	  vec_add (sa->i_id.data, id->payload, plen - sizeof (*id));
+
+	  clib_warning ("received payload IDi, len %u id_type %u",
+			plen - sizeof (*id), id->id_type);
+	}
+      else if (payload == IKEV2_PAYLOAD_IDR)	/* 36 */
+	{
+	  ike_id_payload_header_t *id = (ike_id_payload_header_t *) ikep;
+
+	  sa->r_id.type = id->id_type;
+	  vec_free (sa->r_id.data);
+	  vec_add (sa->r_id.data, id->payload, plen - sizeof (*id));
+
+	  clib_warning ("received payload IDr len %u id_type %u",
+			plen - sizeof (*id), id->id_type);
+	}
+      else if (payload == IKEV2_PAYLOAD_AUTH)	/* 39 */
+	{
+	  ike_auth_payload_header_t *a = (ike_auth_payload_header_t *) ikep;
+
+	  if (sa->is_initiator)
+	    {
+	      sa->r_auth.method = a->auth_method;
+	      vec_free (sa->r_auth.data);
+	      vec_add (sa->r_auth.data, a->payload, plen - sizeof (*a));
+	    }
+	  else
+	    {
+	      sa->i_auth.method = a->auth_method;
+	      vec_free (sa->i_auth.data);
+	      vec_add (sa->i_auth.data, a->payload, plen - sizeof (*a));
+	    }
+
+	  clib_warning ("received payload AUTH, len %u auth_type %u",
+			plen - sizeof (*a), a->auth_method);
+	}
+      else if (payload == IKEV2_PAYLOAD_NOTIFY)	/* 41 */
+	{
+	  ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
+	  if (n->msg_type == IKEV2_NOTIFY_MSG_INITIAL_CONTACT)
+	    {
+	      sa->initial_contact = 1;
+	    }
+	  vec_free (n);
+	}
+      else if (payload == IKEV2_PAYLOAD_VENDOR)	/* 43 */
+	{
+	  ikev2_parse_vendor_payload (ikep);
+	}
+      else if (payload == IKEV2_PAYLOAD_TSI)	/* 44 */
+	{
+	  clib_warning ("received payload TSi, len %u",
+			plen - sizeof (*ikep));
+
+	  vec_free (first_child_sa->tsi);
+	  first_child_sa->tsi = ikev2_parse_ts_payload (ikep);
+	}
+      else if (payload == IKEV2_PAYLOAD_TSR)	/* 45 */
+	{
+	  clib_warning ("received payload TSr, len %u",
+			plen - sizeof (*ikep));
+
+	  vec_free (first_child_sa->tsr);
+	  first_child_sa->tsr = ikev2_parse_ts_payload (ikep);
+	}
+      else
+	{
+	  clib_warning ("unknown payload %u flags %x length %u data %u",
+			payload, ikep->flags, plen - 4,
+			format_hex_bytes, ikep->payload, plen - 4);
+
+	  if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
+	    {
+	      ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
+	      sa->unsupported_cp = payload;
+	      return;
+	    }
+	}
+
+      payload = ikep->nextpayload;
+      p += plen;
+    }
+
+cleanup_and_exit:
+  vec_free (plaintext);
+}
+
+static void
+ikev2_process_informational_req (vlib_main_t * vm, ikev2_sa_t * sa,
+				 ike_header_t * ike)
+{
+  int p = 0;
+  u32 len = clib_net_to_host_u32 (ike->length);
+  u8 payload = ike->nextpayload;
+  u8 *plaintext = 0;
+
+  ike_payload_header_t *ikep;
+  u32 plen;
+
+  clib_warning ("ispi %lx rspi %lx nextpayload %x version %x "
+		"exchange %x flags %x msgid %x length %u",
+		clib_net_to_host_u64 (ike->ispi),
+		clib_net_to_host_u64 (ike->rspi),
+		payload, ike->version,
+		ike->exchange, ike->flags,
+		clib_net_to_host_u32 (ike->msgid), len);
+
+  plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
+
+  if (!plaintext)
+    goto cleanup_and_exit;
+
+  /* process encrypted payload */
+  p = 0;
+  while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
+    {
+      ikep = (ike_payload_header_t *) & plaintext[p];
+      plen = clib_net_to_host_u16 (ikep->length);
+
+      if (plen < sizeof (ike_payload_header_t))
+	goto cleanup_and_exit;
+
+      if (payload == IKEV2_PAYLOAD_NOTIFY)	/* 41 */
+	{
+	  ikev2_notify_t *n = ikev2_parse_notify_payload (ikep);
+	  if (n->msg_type == IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED)
+	    ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
+	  vec_free (n);
+	}
+      else if (payload == IKEV2_PAYLOAD_DELETE)	/* 42 */
+	{
+	  sa->del = ikev2_parse_delete_payload (ikep);
+	}
+      else if (payload == IKEV2_PAYLOAD_VENDOR)	/* 43 */
+	{
+	  ikev2_parse_vendor_payload (ikep);
+	}
+      else
+	{
+	  clib_warning ("unknown payload %u flags %x length %u data %u",
+			payload, ikep->flags, plen - 4,
+			format_hex_bytes, ikep->payload, plen - 4);
+
+	  if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
+	    {
+	      sa->unsupported_cp = payload;
+	      return;
+	    }
+	}
+
+      payload = ikep->nextpayload;
+      p += plen;
+    }
+
+cleanup_and_exit:
+  vec_free (plaintext);
+}
+
+static void
+ikev2_process_create_child_sa_req (vlib_main_t * vm, ikev2_sa_t * sa,
+				   ike_header_t * ike)
+{
+  int p = 0;
+  u32 len = clib_net_to_host_u32 (ike->length);
+  u8 payload = ike->nextpayload;
+  u8 *plaintext = 0;
+  u8 rekeying = 0;
+  u8 nonce[IKEV2_NONCE_SIZE];
+
+  ike_payload_header_t *ikep;
+  u32 plen;
+  ikev2_notify_t *n = 0;
+  ikev2_ts_t *tsi = 0;
+  ikev2_ts_t *tsr = 0;
+  ikev2_sa_proposal_t *proposal = 0;
+  ikev2_child_sa_t *child_sa;
+
+  clib_warning ("ispi %lx rspi %lx nextpayload %x version %x "
+		"exchange %x flags %x msgid %x length %u",
+		clib_net_to_host_u64 (ike->ispi),
+		clib_net_to_host_u64 (ike->rspi),
+		payload, ike->version,
+		ike->exchange, ike->flags,
+		clib_net_to_host_u32 (ike->msgid), len);
+
+  plaintext = ikev2_decrypt_sk_payload (sa, ike, &payload);
+
+  if (!plaintext)
+    goto cleanup_and_exit;
+
+  /* process encrypted payload */
+  p = 0;
+  while (p < vec_len (plaintext) && payload != IKEV2_PAYLOAD_NONE)
+    {
+      ikep = (ike_payload_header_t *) & plaintext[p];
+      plen = clib_net_to_host_u16 (ikep->length);
+
+      if (plen < sizeof (ike_payload_header_t))
+	goto cleanup_and_exit;
+
+      else if (payload == IKEV2_PAYLOAD_SA)
+	{
+	  proposal = ikev2_parse_sa_payload (ikep);
+	}
+      else if (payload == IKEV2_PAYLOAD_NOTIFY)
+	{
+	  n = ikev2_parse_notify_payload (ikep);
+	  if (n->msg_type == IKEV2_NOTIFY_MSG_REKEY_SA)
+	    {
+	      rekeying = 1;
+	    }
+	}
+      else if (payload == IKEV2_PAYLOAD_DELETE)
+	{
+	  sa->del = ikev2_parse_delete_payload (ikep);
+	}
+      else if (payload == IKEV2_PAYLOAD_VENDOR)
+	{
+	  ikev2_parse_vendor_payload (ikep);
+	}
+      else if (payload == IKEV2_PAYLOAD_NONCE)
+	{
+	  clib_memcpy_fast (nonce, ikep->payload, plen - sizeof (*ikep));
+	}
+      else if (payload == IKEV2_PAYLOAD_TSI)
+	{
+	  tsi = ikev2_parse_ts_payload (ikep);
+	}
+      else if (payload == IKEV2_PAYLOAD_TSR)
+	{
+	  tsr = ikev2_parse_ts_payload (ikep);
+	}
+      else
+	{
+	  clib_warning ("unknown payload %u flags %x length %u data %u",
+			payload, ikep->flags, plen - 4,
+			format_hex_bytes, ikep->payload, plen - 4);
+
+	  if (ikep->flags & IKEV2_PAYLOAD_FLAG_CRITICAL)
+	    {
+	      sa->unsupported_cp = payload;
+	      return;
+	    }
+	}
+
+      payload = ikep->nextpayload;
+      p += plen;
+    }
+
+  if (sa->is_initiator && proposal->protocol_id == IKEV2_PROTOCOL_ESP)
+    {
+      ikev2_rekey_t *rekey = &sa->rekey[0];
+      rekey->protocol_id = proposal->protocol_id;
+      rekey->i_proposal =
+	ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
+      rekey->i_proposal->spi = rekey->spi;
+      rekey->r_proposal = proposal;
+      rekey->tsi = tsi;
+      rekey->tsr = tsr;
+      /* update Nr */
+      vec_free (sa->r_nonce);
+      vec_add (sa->r_nonce, nonce, IKEV2_NONCE_SIZE);
+      child_sa = ikev2_sa_get_child (sa, rekey->ispi, IKEV2_PROTOCOL_ESP, 1);
+      if (child_sa)
+	{
+	  child_sa->rekey_retries = 0;
+	}
+    }
+  else if (rekeying)
+    {
+      ikev2_rekey_t *rekey;
+      child_sa = ikev2_sa_get_child (sa, n->spi, n->protocol_id, 1);
+      if (!child_sa)
+	{
+	  clib_warning ("child SA spi %lx not found", n->spi);
+	  goto cleanup_and_exit;
+	}
+      vec_add2 (sa->rekey, rekey, 1);
+      rekey->protocol_id = n->protocol_id;
+      rekey->spi = n->spi;
+      rekey->i_proposal = proposal;
+      rekey->r_proposal =
+	ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP);
+      rekey->tsi = tsi;
+      rekey->tsr = tsr;
+      /* update Ni */
+      vec_free (sa->i_nonce);
+      vec_add (sa->i_nonce, nonce, IKEV2_NONCE_SIZE);
+      /* generate new Nr */
+      vec_free (sa->r_nonce);
+      sa->r_nonce = vec_new (u8, IKEV2_NONCE_SIZE);
+      RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE);
+    }
+
+cleanup_and_exit:
+  vec_free (plaintext);
+  vec_free (n);
+}
+
+static u8 *
+ikev2_sa_generate_authmsg (ikev2_sa_t * sa, int is_responder)
+{
+  u8 *authmsg = 0;
+  u8 *data;
+  u8 *nonce;
+  ikev2_id_t *id;
+  u8 *key;
+  u8 *packet_data;
+  ikev2_sa_transform_t *tr_prf;
+
+  tr_prf =
+    ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
+
+  if (is_responder)
+    {
+      id = &sa->r_id;
+      key = sa->sk_pr;
+      nonce = sa->i_nonce;
+      packet_data = sa->last_sa_init_res_packet_data;
+    }
+  else
+    {
+      id = &sa->i_id;
+      key = sa->sk_pi;
+      nonce = sa->r_nonce;
+      packet_data = sa->last_sa_init_req_packet_data;
+    }
+
+  data = vec_new (u8, 4);
+  data[0] = id->type;
+  vec_append (data, id->data);
+
+  u8 *id_hash = ikev2_calc_prf (tr_prf, key, data);
+  vec_append (authmsg, packet_data);
+  vec_append (authmsg, nonce);
+  vec_append (authmsg, id_hash);
+  vec_free (id_hash);
+  vec_free (data);
+
+  return authmsg;
+}
+
+static int
+ikev2_ts_cmp (ikev2_ts_t * ts1, ikev2_ts_t * ts2)
+{
+  if (ts1->ts_type == ts2->ts_type && ts1->protocol_id == ts2->protocol_id &&
+      ts1->start_port == ts2->start_port && ts1->end_port == ts2->end_port &&
+      ts1->start_addr.as_u32 == ts2->start_addr.as_u32 &&
+      ts1->end_addr.as_u32 == ts2->end_addr.as_u32)
+    return 1;
+
+  return 0;
+}
+
+static void
+ikev2_sa_match_ts (ikev2_sa_t * sa)
+{
+  ikev2_main_t *km = &ikev2_main;
+  ikev2_profile_t *p;
+  ikev2_ts_t *ts, *p_tsi, *p_tsr, *tsi = 0, *tsr = 0;
+  ikev2_id_t *id;
+
+  /* *INDENT-OFF* */
+  pool_foreach (p, km->profiles, ({
+
+    if (sa->is_initiator)
+      {
+        p_tsi = &p->loc_ts;
+        p_tsr = &p->rem_ts;
+        id = &sa->r_id;
+      }
+    else
+      {
+        p_tsi = &p->rem_ts;
+        p_tsr = &p->loc_ts;
+        id = &sa->i_id;
+      }
+
+    /* check id */
+    if (p->rem_id.type != id->type ||
+        vec_len(p->rem_id.data) != vec_len(id->data) ||
+        memcmp(p->rem_id.data, id->data, vec_len(p->rem_id.data)))
+      continue;
+
+    vec_foreach(ts, sa->childs[0].tsi)
+      {
+        if (ikev2_ts_cmp(p_tsi, ts))
+          {
+            tsi = vec_dup(ts);
+            break;
+          }
+      }
+
+    vec_foreach(ts, sa->childs[0].tsr)
+      {
+        if (ikev2_ts_cmp(p_tsr, ts))
+          {
+            tsr = vec_dup(ts);
+            break;
+          }
+      }
+
+    break;
+  }));
+  /* *INDENT-ON* */
+
+  if (tsi && tsr)
+    {
+      vec_free (sa->childs[0].tsi);
+      vec_free (sa->childs[0].tsr);
+      sa->childs[0].tsi = tsi;
+      sa->childs[0].tsr = tsr;
+    }
+  else
+    {
+      vec_free (tsi);
+      vec_free (tsr);
+      ikev2_set_state (sa, IKEV2_STATE_TS_UNACCEPTABLE);
+    }
+}
+
+static void
+ikev2_sa_auth (ikev2_sa_t * sa)
+{
+  ikev2_main_t *km = &ikev2_main;
+  ikev2_profile_t *p, *sel_p = 0;
+  u8 *authmsg, *key_pad, *psk = 0, *auth = 0;
+  ikev2_sa_transform_t *tr_prf;
+
+  tr_prf =
+    ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
+
+  /* only shared key and rsa signature */
+  if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
+	sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
+    {
+      clib_warning ("unsupported authentication method %u",
+		    sa->i_auth.method);
+      ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
+      return;
+    }
+
+  key_pad = format (0, "%s", IKEV2_KEY_PAD);
+  authmsg = ikev2_sa_generate_authmsg (sa, sa->is_initiator);
+
+  ikev2_id_t *sa_id;
+  ikev2_auth_t *sa_auth;
+
+  if (sa->is_initiator)
+    {
+      sa_id = &sa->r_id;
+      sa_auth = &sa->r_auth;
+    }
+  else
+    {
+      sa_id = &sa->i_id;
+      sa_auth = &sa->i_auth;
+    }
+
+  /* *INDENT-OFF* */
+  pool_foreach (p, km->profiles, ({
+
+    /* check id */
+    if (p->rem_id.type != sa_id->type ||
+        vec_len(p->rem_id.data) != vec_len(sa_id->data) ||
+        memcmp(p->rem_id.data, sa_id->data, vec_len(p->rem_id.data)))
+      continue;
+
+    if (sa_auth->method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
+      {
+        if (!p->auth.data ||
+             p->auth.method != IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
+          continue;
+
+        psk = ikev2_calc_prf(tr_prf, p->auth.data, key_pad);
+        auth = ikev2_calc_prf(tr_prf, psk, authmsg);
+
+        if (!memcmp(auth, sa_auth->data, vec_len(sa_auth->data)))
+          {
+            ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
+            vec_free(auth);
+            sel_p = p;
+            break;
+          }
+
+      }
+    else if (sa_auth->method == IKEV2_AUTH_METHOD_RSA_SIG)
+      {
+        if (p->auth.method != IKEV2_AUTH_METHOD_RSA_SIG)
+          continue;
+
+        if (ikev2_verify_sign(p->auth.key, sa_auth->data, authmsg) == 1)
+          {
+            ikev2_set_state(sa, IKEV2_STATE_AUTHENTICATED);
+            sel_p = p;
+            break;
+          }
+      }
+
+    vec_free(auth);
+    vec_free(psk);
+  }));
+  /* *INDENT-ON* */
+
+  vec_free (authmsg);
+
+  if (sa->state == IKEV2_STATE_AUTHENTICATED)
+    {
+      if (!sa->is_initiator)
+	{
+	  vec_free (sa->r_id.data);
+	  sa->r_id.data = vec_dup (sel_p->loc_id.data);
+	  sa->r_id.type = sel_p->loc_id.type;
+
+	  /* generate our auth data */
+	  authmsg = ikev2_sa_generate_authmsg (sa, 1);
+	  if (sel_p->auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
+	    {
+	      sa->r_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
+	      sa->r_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
+	    }
+	  else if (sel_p->auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
+	    {
+	      sa->r_auth.data = ikev2_calc_sign (km->pkey, authmsg);
+	      sa->r_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
+	    }
+	  vec_free (authmsg);
+
+	  /* select transforms for 1st child sa */
+	  ikev2_sa_free_proposal_vector (&sa->childs[0].r_proposals);
+	  sa->childs[0].r_proposals =
+	    ikev2_select_proposal (sa->childs[0].i_proposals,
+				   IKEV2_PROTOCOL_ESP);
+	}
+    }
+  else
+    {
+      ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
+    }
+  vec_free (psk);
+  vec_free (key_pad);
+}
+
+
+static void
+ikev2_sa_auth_init (ikev2_sa_t * sa)
+{
+  ikev2_main_t *km = &ikev2_main;
+  u8 *authmsg, *key_pad, *psk = 0, *auth = 0;
+  ikev2_sa_transform_t *tr_prf;
+
+  tr_prf =
+    ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_PRF);
+
+  /* only shared key and rsa signature */
+  if (!(sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC ||
+	sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG))
+    {
+      clib_warning ("unsupported authentication method %u",
+		    sa->i_auth.method);
+      ikev2_set_state (sa, IKEV2_STATE_AUTH_FAILED);
+      return;
+    }
+
+  key_pad = format (0, "%s", IKEV2_KEY_PAD);
+  authmsg = ikev2_sa_generate_authmsg (sa, 0);
+  psk = ikev2_calc_prf (tr_prf, sa->i_auth.data, key_pad);
+  auth = ikev2_calc_prf (tr_prf, psk, authmsg);
+
+
+  if (sa->i_auth.method == IKEV2_AUTH_METHOD_SHARED_KEY_MIC)
+    {
+      sa->i_auth.data = ikev2_calc_prf (tr_prf, psk, authmsg);
+      sa->i_auth.method = IKEV2_AUTH_METHOD_SHARED_KEY_MIC;
+    }
+  else if (sa->i_auth.method == IKEV2_AUTH_METHOD_RSA_SIG)
+    {
+      sa->i_auth.data = ikev2_calc_sign (km->pkey, authmsg);
+      sa->i_auth.method = IKEV2_AUTH_METHOD_RSA_SIG;
+    }
+
+  vec_free (psk);
+  vec_free (key_pad);
+  vec_free (auth);
+  vec_free (authmsg);
+}
+
+
+static int
+ikev2_create_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa,
+			       ikev2_child_sa_t * child)
+{
+  ipsec_add_del_tunnel_args_t a;
+  ikev2_sa_transform_t *tr;
+  ikev2_sa_proposal_t *proposals;
+  u8 encr_type = 0;
+  u8 integ_type = 0;
+
+  if (!child->r_proposals)
+    {
+      ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
+      return 1;
+    }
+
+  clib_memset (&a, 0, sizeof (a));
+  a.is_add = 1;
+  if (sa->is_initiator)
+    {
+      a.local_ip.ip4.as_u32 = sa->iaddr.as_u32;
+      a.remote_ip.ip4.as_u32 = sa->raddr.as_u32;
+      proposals = child->i_proposals;
+      a.local_spi = child->r_proposals[0].spi;
+      a.remote_spi = child->i_proposals[0].spi;
+    }
+  else
+    {
+      a.local_ip.ip4.as_u32 = sa->raddr.as_u32;
+      a.remote_ip.ip4.as_u32 = sa->iaddr.as_u32;
+      proposals = child->r_proposals;
+      a.local_spi = child->i_proposals[0].spi;
+      a.remote_spi = child->r_proposals[0].spi;
+    }
+  a.anti_replay = 1;
+
+  tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ESN);
+  if (tr)
+    a.esn = tr->esn_type;
+  else
+    a.esn = 0;
+
+  tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_ENCR);
+  if (tr)
+    {
+      if (tr->encr_type == IKEV2_TRANSFORM_ENCR_TYPE_AES_CBC && tr->key_len)
+	{
+	  switch (tr->key_len)
+	    {
+	    case 16:
+	      encr_type = IPSEC_CRYPTO_ALG_AES_CBC_128;
+	      break;
+	    case 24:
+	      encr_type = IPSEC_CRYPTO_ALG_AES_CBC_192;
+	      break;
+	    case 32:
+	      encr_type = IPSEC_CRYPTO_ALG_AES_CBC_256;
+	      break;
+	    default:
+	      ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
+	      return 1;
+	      break;
+	    }
+	}
+      else
+	{
+	  ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
+	  return 1;
+	}
+    }
+  else
+    {
+      ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
+      return 1;
+    }
+
+  tr = ikev2_sa_get_td_for_type (proposals, IKEV2_TRANSFORM_TYPE_INTEG);
+  if (tr)
+    {
+      switch (tr->integ_type)
+	{
+	case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_256_128:
+	  integ_type = IPSEC_INTEG_ALG_SHA_256_128;
+	  break;
+	case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_384_192:
+	  integ_type = IPSEC_INTEG_ALG_SHA_384_192;
+	  break;
+	case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA2_512_256:
+	  integ_type = IPSEC_INTEG_ALG_SHA_512_256;
+	  break;
+	case IKEV2_TRANSFORM_INTEG_TYPE_AUTH_HMAC_SHA1_96:
+	  integ_type = IPSEC_INTEG_ALG_SHA1_96;
+	  break;
+	default:
+	  ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
+	  return 1;
+	}
+    }
+  else
+    {
+      ikev2_set_state (sa, IKEV2_STATE_NO_PROPOSAL_CHOSEN);
+      return 1;
+    }
+
+  ikev2_calc_child_keys (sa, child);
+
+  u8 *loc_ckey, *rem_ckey, *loc_ikey, *rem_ikey;
+  if (sa->is_initiator)
+    {
+      loc_ikey = child->sk_ai;
+      rem_ikey = child->sk_ar;
+      loc_ckey = child->sk_ei;
+      rem_ckey = child->sk_er;
+    }
+  else
+    {
+      loc_ikey = child->sk_ar;
+      rem_ikey = child->sk_ai;
+      loc_ckey = child->sk_er;
+      rem_ckey = child->sk_ei;
+    }
+
+  a.integ_alg = integ_type;
+  a.local_integ_key_len = vec_len (loc_ikey);
+  clib_memcpy_fast (a.local_integ_key, loc_ikey, a.local_integ_key_len);
+  a.remote_integ_key_len = vec_len (rem_ikey);
+  clib_memcpy_fast (a.remote_integ_key, rem_ikey, a.remote_integ_key_len);
+
+  a.crypto_alg = encr_type;
+  a.local_crypto_key_len = vec_len (loc_ckey);
+  clib_memcpy_fast (a.local_crypto_key, loc_ckey, a.local_crypto_key_len);
+  a.remote_crypto_key_len = vec_len (rem_ckey);
+  clib_memcpy_fast (a.remote_crypto_key, rem_ckey, a.remote_crypto_key_len);
+
+  if (sa->profile && sa->profile->lifetime)
+    {
+      child->time_to_expiration = vlib_time_now (vnm->vlib_main)
+	+ sa->profile->lifetime;
+      if (sa->profile->lifetime_jitter)
+	{
+	  // This is not much better than rand(3), which Coverity warns
+	  // is unsuitable for security applications; random_u32 is
+	  // however fast. If this perturbance to the expiration time
+	  // needs to use a better RNG then we may need to use something
+	  // like /dev/urandom which has significant overhead.
+	  u32 rnd = (u32) (vlib_time_now (vnm->vlib_main) * 1e6);
+	  rnd = random_u32 (&rnd);
+
+	  child->time_to_expiration +=
+	    1 + (rnd % sa->profile->lifetime_jitter);
+	}
+    }
+
+  ipsec_add_del_tunnel_if (&a);
+
+  return 0;
+}
+
+static int
+ikev2_delete_tunnel_interface (vnet_main_t * vnm, ikev2_sa_t * sa,
+			       ikev2_child_sa_t * child)
+{
+  ipsec_add_del_tunnel_args_t a;
+
+  if (sa->is_initiator)
+    {
+      if (!vec_len (child->i_proposals))
+	return 0;
+
+      a.is_add = 0;
+      a.local_ip.ip4.as_u32 = sa->iaddr.as_u32;
+      a.remote_ip.ip4.as_u32 = sa->raddr.as_u32;
+      a.local_spi = child->r_proposals[0].spi;
+      a.remote_spi = child->i_proposals[0].spi;
+    }
+  else
+    {
+      if (!vec_len (child->r_proposals))
+	return 0;
+
+      a.is_add = 0;
+      a.local_ip.ip4.as_u32 = sa->raddr.as_u32;
+      a.remote_ip.ip4.as_u32 = sa->iaddr.as_u32;
+      a.local_spi = child->i_proposals[0].spi;
+      a.remote_spi = child->r_proposals[0].spi;
+    }
+
+  ipsec_add_del_tunnel_if (&a);
+  return 0;
+}
+
+static u32
+ikev2_generate_message (ikev2_sa_t * sa, ike_header_t * ike, void *user)
+{
+  v8 *integ = 0;
+  ike_payload_header_t *ph;
+  u16 plen;
+  u32 tlen = 0;
+
+  ikev2_sa_transform_t *tr_encr, *tr_integ;
+  tr_encr =
+    ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_ENCR);
+  tr_integ =
+    ikev2_sa_get_td_for_type (sa->r_proposals, IKEV2_TRANSFORM_TYPE_INTEG);
+
+  ikev2_payload_chain_t *chain = 0;
+  ikev2_payload_new_chain (chain);
+
+  if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
+    {
+      if (sa->r_proposals == 0)
+	{
+	  ikev2_payload_add_notify (chain,
+				    IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
+	  ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
+	}
+      else if (sa->dh_group == IKEV2_TRANSFORM_DH_TYPE_NONE)
+	{
+	  u8 *data = vec_new (u8, 2);
+	  ikev2_sa_transform_t *tr_dh;
+	  tr_dh =
+	    ikev2_sa_get_td_for_type (sa->r_proposals,
+				      IKEV2_TRANSFORM_TYPE_DH);
+	  ASSERT (tr_dh && tr_dh->dh_type);
+
+	  data[0] = (tr_dh->dh_type >> 8) & 0xff;
+	  data[1] = (tr_dh->dh_type) & 0xff;
+
+	  ikev2_payload_add_notify (chain,
+				    IKEV2_NOTIFY_MSG_INVALID_KE_PAYLOAD,
+				    data);
+	  vec_free (data);
+	  ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
+	}
+      else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
+	{
+	  u8 *data = vec_new (u8, 1);
+
+	  data[0] = sa->unsupported_cp;
+	  ikev2_payload_add_notify (chain,
+				    IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
+				    data);
+	  vec_free (data);
+	}
+      else
+	{
+	  ike->rspi = clib_host_to_net_u64 (sa->rspi);
+	  ikev2_payload_add_sa (chain, sa->r_proposals);
+	  ikev2_payload_add_ke (chain, sa->dh_group, sa->r_dh_data);
+	  ikev2_payload_add_nonce (chain, sa->r_nonce);
+	}
+    }
+  else if (ike->exchange == IKEV2_EXCHANGE_IKE_AUTH)
+    {
+      if (sa->state == IKEV2_STATE_AUTHENTICATED)
+	{
+	  ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
+	  ikev2_payload_add_auth (chain, &sa->r_auth);
+	  ikev2_payload_add_sa (chain, sa->childs[0].r_proposals);
+	  ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
+	  ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
+	}
+      else if (sa->state == IKEV2_STATE_AUTH_FAILED)
+	{
+	  ikev2_payload_add_notify (chain,
+				    IKEV2_NOTIFY_MSG_AUTHENTICATION_FAILED,
+				    0);
+	  ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
+	}
+      else if (sa->state == IKEV2_STATE_TS_UNACCEPTABLE)
+	{
+	  ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_TS_UNACCEPTABLE,
+				    0);
+	  ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
+	  ikev2_payload_add_auth (chain, &sa->r_auth);
+	}
+      else if (sa->state == IKEV2_STATE_NO_PROPOSAL_CHOSEN)
+	{
+	  ikev2_payload_add_notify (chain,
+				    IKEV2_NOTIFY_MSG_NO_PROPOSAL_CHOSEN, 0);
+	  ikev2_payload_add_id (chain, &sa->r_id, IKEV2_PAYLOAD_IDR);
+	  ikev2_payload_add_auth (chain, &sa->r_auth);
+	  ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
+	  ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
+	}
+      else if (sa->state == IKEV2_STATE_NOTIFY_AND_DELETE)
+	{
+	  u8 *data = vec_new (u8, 1);
+
+	  data[0] = sa->unsupported_cp;
+	  ikev2_payload_add_notify (chain,
+				    IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
+				    data);
+	  vec_free (data);
+	}
+      else if (sa->state == IKEV2_STATE_SA_INIT)
+	{
+	  ikev2_payload_add_id (chain, &sa->i_id, IKEV2_PAYLOAD_IDI);
+	  ikev2_payload_add_auth (chain, &sa->i_auth);
+	  ikev2_payload_add_sa (chain, sa->childs[0].i_proposals);
+	  ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
+	  ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
+	}
+      else
+	{
+	  ikev2_set_state (sa, IKEV2_STATE_DELETED);
+	  goto done;
+	}
+    }
+  else if (ike->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
+    {
+      /* if pending delete */
+      if (sa->del)
+	{
+	  if (sa->del[0].protocol_id == IKEV2_PROTOCOL_IKE)
+	    {
+	      if (sa->is_initiator)
+		ikev2_payload_add_delete (chain, sa->del);
+
+	      /* The response to a request that deletes the IKE SA is an empty
+	         INFORMATIONAL response. */
+	      ikev2_set_state (sa, IKEV2_STATE_NOTIFY_AND_DELETE);
+	    }
+	  /* The response to a request that deletes ESP or AH SAs will contain
+	     delete payloads for the paired SAs going in the other direction. */
+	  else
+	    {
+	      ikev2_payload_add_delete (chain, sa->del);
+	    }
+	  vec_free (sa->del);
+	  sa->del = 0;
+	}
+      /* received N(AUTHENTICATION_FAILED) */
+      else if (sa->state == IKEV2_STATE_AUTH_FAILED)
+	{
+	  ikev2_set_state (sa, IKEV2_STATE_DELETED);
+	  goto done;
+	}
+      /* received unsupported critical payload */
+      else if (sa->unsupported_cp)
+	{
+	  u8 *data = vec_new (u8, 1);
+
+	  data[0] = sa->unsupported_cp;
+	  ikev2_payload_add_notify (chain,
+				    IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
+				    data);
+	  vec_free (data);
+	  sa->unsupported_cp = 0;
+	}
+      /* else send empty response */
+    }
+  else if (ike->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
+    {
+      if (sa->is_initiator)
+	{
+
+	  ikev2_sa_proposal_t *proposals = (ikev2_sa_proposal_t *) user;
+	  ikev2_notify_t notify;
+	  u8 *data = vec_new (u8, 4);
+	  clib_memset (&notify, 0, sizeof (notify));
+	  notify.protocol_id = IKEV2_PROTOCOL_ESP;
+	  notify.spi = sa->childs[0].i_proposals->spi;
+	  *(u32 *) data = clib_host_to_net_u32 (notify.spi);
+
+	  ikev2_payload_add_sa (chain, proposals);
+	  ikev2_payload_add_nonce (chain, sa->i_nonce);
+	  ikev2_payload_add_ts (chain, sa->childs[0].tsi, IKEV2_PAYLOAD_TSI);
+	  ikev2_payload_add_ts (chain, sa->childs[0].tsr, IKEV2_PAYLOAD_TSR);
+	  ikev2_payload_add_notify_2 (chain, IKEV2_NOTIFY_MSG_REKEY_SA, data,
+				      &notify);
+
+	  vec_free (data);
+	}
+      else
+	{
+	  if (sa->rekey)
+	    {
+	      ikev2_payload_add_sa (chain, sa->rekey[0].r_proposal);
+	      ikev2_payload_add_nonce (chain, sa->r_nonce);
+	      ikev2_payload_add_ts (chain, sa->rekey[0].tsi,
+				    IKEV2_PAYLOAD_TSI);
+	      ikev2_payload_add_ts (chain, sa->rekey[0].tsr,
+				    IKEV2_PAYLOAD_TSR);
+	      vec_del1 (sa->rekey, 0);
+	    }
+	  else if (sa->unsupported_cp)
+	    {
+	      u8 *data = vec_new (u8, 1);
+
+	      data[0] = sa->unsupported_cp;
+	      ikev2_payload_add_notify (chain,
+					IKEV2_NOTIFY_MSG_UNSUPPORTED_CRITICAL_PAYLOAD,
+					data);
+	      vec_free (data);
+	      sa->unsupported_cp = 0;
+	    }
+	  else
+	    {
+	      ikev2_payload_add_notify (chain,
+					IKEV2_NOTIFY_MSG_NO_ADDITIONAL_SAS,
+					0);
+	    }
+	}
+    }
+
+  /* IKEv2 header */
+  ike->version = IKE_VERSION_2;
+  ike->nextpayload = IKEV2_PAYLOAD_SK;
+  tlen = sizeof (*ike);
+  if (sa->is_initiator)
+    {
+      ike->flags = IKEV2_HDR_FLAG_INITIATOR;
+      sa->last_init_msg_id = clib_net_to_host_u32 (ike->msgid);
+    }
+  else
+    {
+      ike->flags = IKEV2_HDR_FLAG_RESPONSE;
+    }
+
+
+  if (ike->exchange == IKEV2_EXCHANGE_SA_INIT)
+    {
+      tlen += vec_len (chain->data);
+      ike->nextpayload = chain->first_payload_type;
+      ike->length = clib_host_to_net_u32 (tlen);
+      clib_memcpy_fast (ike->payload, chain->data, vec_len (chain->data));
+
+      /* store whole IKE payload - needed for PSK auth */
+      vec_free (sa->last_sa_init_res_packet_data);
+      vec_add (sa->last_sa_init_res_packet_data, ike, tlen);
+    }
+  else
+    {
+
+      ikev2_payload_chain_add_padding (chain, tr_encr->block_size);
+
+      /* SK payload */
+      plen = sizeof (*ph);
+      ph = (ike_payload_header_t *) & ike->payload[0];
+      ph->nextpayload = chain->first_payload_type;
+      ph->flags = 0;
+      int enc_len = ikev2_encrypt_data (sa, chain->data, ph->payload);
+      plen += enc_len;
+
+      /* add space for hmac */
+      plen += tr_integ->key_trunc;
+      tlen += plen;
+
+      /* payload and total length */
+      ph->length = clib_host_to_net_u16 (plen);
+      ike->length = clib_host_to_net_u32 (tlen);
+
+      /* calc integrity data for whole packet except hash itself */
+      integ =
+	ikev2_calc_integr (tr_integ, sa->is_initiator ? sa->sk_ai : sa->sk_ar,
+			   (u8 *) ike, tlen - tr_integ->key_trunc);
+
+      clib_memcpy_fast (ike->payload + tlen - tr_integ->key_trunc -
+			sizeof (*ike), integ, tr_integ->key_trunc);
+
+      /* store whole IKE payload - needed for retransmit */
+      vec_free (sa->last_res_packet_data);
+      vec_add (sa->last_res_packet_data, ike, tlen);
+    }
+
+done:
+  ikev2_payload_destroy_chain (chain);
+  vec_free (integ);
+  return tlen;
+}
+
+static int
+ikev2_retransmit_sa_init (ike_header_t * ike,
+			  ip4_address_t iaddr, ip4_address_t raddr)
+{
+  ikev2_main_t *km = &ikev2_main;
+  ikev2_sa_t *sa;
+  u32 thread_index = vlib_get_thread_index ();
+
+  /* *INDENT-OFF* */
+  pool_foreach (sa, km->per_thread_data[thread_index].sas, ({
+    if (sa->ispi == clib_net_to_host_u64(ike->ispi) &&
+        sa->iaddr.as_u32 == iaddr.as_u32 &&
+        sa->raddr.as_u32 == raddr.as_u32)
+      {
+        int p = 0;
+        u32 len = clib_net_to_host_u32(ike->length);
+        u8 payload = ike->nextpayload;
+
+        while (p < len && payload!= IKEV2_PAYLOAD_NONE) {
+          ike_payload_header_t * ikep = (ike_payload_header_t *) &ike->payload[p];
+          u32 plen = clib_net_to_host_u16(ikep->length);
+
+          if (plen < sizeof(ike_payload_header_t))
+            return -1;
+
+          if (payload == IKEV2_PAYLOAD_NONCE)
+            {
+              if (!memcmp(sa->i_nonce, ikep->payload, plen - sizeof(*ikep)))
+                {
+                  /* req is retransmit */
+                  if (sa->state == IKEV2_STATE_SA_INIT)
+                    {
+                      ike_header_t * tmp;
+                      tmp = (ike_header_t*)sa->last_sa_init_res_packet_data;
+                      ike->ispi = tmp->ispi;
+                      ike->rspi = tmp->rspi;
+                      ike->nextpayload = tmp->nextpayload;
+                      ike->version = tmp->version;
+                      ike->exchange = tmp->exchange;
+                      ike->flags = tmp->flags;
+                      ike->msgid = tmp->msgid;
+                      ike->length = tmp->length;
+                      clib_memcpy_fast(ike->payload, tmp->payload,
+                             clib_net_to_host_u32(tmp->length) - sizeof(*ike));
+                      clib_warning("IKE_SA_INIT retransmit from %U to %U",
+                                   format_ip4_address, &raddr,
+                                   format_ip4_address, &iaddr);
+                      return 1;
+                    }
+                  /* else ignore req */
+                  else
+                    {
+                      clib_warning("IKE_SA_INIT ignore from %U to %U",
+                                   format_ip4_address, &raddr,
+                                   format_ip4_address, &iaddr);
+                      return -1;
+                    }
+                }
+            }
+          payload = ikep->nextpayload;
+          p+=plen;
+        }
+      }
+  }));
+  /* *INDENT-ON* */
+
+  /* req is not retransmit */
+  return 0;
+}
+
+static int
+ikev2_retransmit_resp (ikev2_sa_t * sa, ike_header_t * ike)
+{
+  u32 msg_id = clib_net_to_host_u32 (ike->msgid);
+
+  /* new req */
+  if (msg_id > sa->last_msg_id)
+    {
+      sa->last_msg_id = msg_id;
+      return 0;
+    }
+  /* retransmitted req */
+  else if (msg_id == sa->last_msg_id)
+    {
+      ike_header_t *tmp;
+      tmp = (ike_header_t *) sa->last_res_packet_data;
+      ike->ispi = tmp->ispi;
+      ike->rspi = tmp->rspi;
+      ike->nextpayload = tmp->nextpayload;
+      ike->version = tmp->version;
+      ike->exchange = tmp->exchange;
+      ike->flags = tmp->flags;
+      ike->msgid = tmp->msgid;
+      ike->length = tmp->length;
+      clib_memcpy_fast (ike->payload, tmp->payload,
+			clib_net_to_host_u32 (tmp->length) - sizeof (*ike));
+      clib_warning ("IKE msgid %u retransmit from %U to %U",
+		    msg_id,
+		    format_ip4_address, &sa->raddr,
+		    format_ip4_address, &sa->iaddr);
+      return 1;
+    }
+  /* old req ignore */
+  else
+    {
+      clib_warning ("IKE msgid %u req ignore from %U to %U",
+		    msg_id,
+		    format_ip4_address, &sa->raddr,
+		    format_ip4_address, &sa->iaddr);
+      return -1;
+    }
+}
+
+
+static uword
+ikev2_node_fn (vlib_main_t * vm,
+	       vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+  u32 n_left_from, *from, *to_next;
+  ikev2_next_t next_index;
+  ikev2_main_t *km = &ikev2_main;
+  u32 thread_index = vlib_get_thread_index ();
+
+  from = vlib_frame_vector_args (frame);
+  n_left_from = frame->n_vectors;
+  next_index = node->cached_next_index;
+
+  while (n_left_from > 0)
+    {
+      u32 n_left_to_next;
+
+      vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+      while (n_left_from > 0 && n_left_to_next > 0)
+	{
+	  u32 bi0;
+	  vlib_buffer_t *b0;
+	  u32 next0 = IKEV2_NEXT_ERROR_DROP;
+	  u32 sw_if_index0;
+	  ip4_header_t *ip40;
+	  udp_header_t *udp0;
+	  ike_header_t *ike0;
+	  ikev2_sa_t *sa0 = 0;
+	  ikev2_sa_t sa;	/* temporary store for SA */
+	  int len = 0;
+	  int r;
+
+	  /* speculatively enqueue b0 to the current next frame */
+	  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);
+	  ike0 = vlib_buffer_get_current (b0);
+	  vlib_buffer_advance (b0, -sizeof (*udp0));
+	  udp0 = vlib_buffer_get_current (b0);
+	  vlib_buffer_advance (b0, -sizeof (*ip40));
+	  ip40 = vlib_buffer_get_current (b0);
+
+	  if (ike0->version != IKE_VERSION_2)
+	    {
+	      vlib_node_increment_counter (vm, ikev2_node.index,
+					   IKEV2_ERROR_NOT_IKEV2, 1);
+	      goto dispatch0;
+	    }
+
+	  if (ike0->exchange == IKEV2_EXCHANGE_SA_INIT)
+	    {
+	      sa0 = &sa;
+	      clib_memset (sa0, 0, sizeof (*sa0));
+
+	      if (ike0->flags & IKEV2_HDR_FLAG_INITIATOR)
+		{
+		  if (ike0->rspi == 0)
+		    {
+		      sa0->raddr.as_u32 = ip40->dst_address.as_u32;
+		      sa0->iaddr.as_u32 = ip40->src_address.as_u32;
+
+		      r = ikev2_retransmit_sa_init (ike0, sa0->iaddr,
+						    sa0->raddr);
+		      if (r == 1)
+			{
+			  vlib_node_increment_counter (vm, ikev2_node.index,
+						       IKEV2_ERROR_IKE_SA_INIT_RETRANSMIT,
+						       1);
+			  len = clib_net_to_host_u32 (ike0->length);
+			  goto dispatch0;
+			}
+		      else if (r == -1)
+			{
+			  vlib_node_increment_counter (vm, ikev2_node.index,
+						       IKEV2_ERROR_IKE_SA_INIT_IGNORE,
+						       1);
+			  goto dispatch0;
+			}
+
+		      ikev2_process_sa_init_req (vm, sa0, ike0);
+
+		      if (sa0->state == IKEV2_STATE_SA_INIT)
+			{
+			  ikev2_sa_free_proposal_vector (&sa0->r_proposals);
+			  sa0->r_proposals =
+			    ikev2_select_proposal (sa0->i_proposals,
+						   IKEV2_PROTOCOL_IKE);
+			  ikev2_generate_sa_init_data (sa0);
+			}
+
+		      if (sa0->state == IKEV2_STATE_SA_INIT
+			  || sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE)
+			{
+			  len = ikev2_generate_message (sa0, ike0, 0);
+			}
+
+		      if (sa0->state == IKEV2_STATE_SA_INIT)
+			{
+			  /* add SA to the pool */
+			  pool_get (km->per_thread_data[thread_index].sas,
+				    sa0);
+			  clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
+			  hash_set (km->
+				    per_thread_data[thread_index].sa_by_rspi,
+				    sa0->rspi,
+				    sa0 -
+				    km->per_thread_data[thread_index].sas);
+			}
+		      else
+			{
+			  ikev2_sa_free_all_vec (sa0);
+			}
+		    }
+		}
+	      else		//received sa_init without initiator flag
+		{
+		  ikev2_process_sa_init_resp (vm, sa0, ike0);
+
+		  if (sa0->state == IKEV2_STATE_SA_INIT)
+		    {
+		      ike0->exchange = IKEV2_EXCHANGE_IKE_AUTH;
+		      uword *p = hash_get (km->sa_by_ispi, ike0->ispi);
+		      if (p)
+			{
+			  ikev2_sa_t *sai =
+			    pool_elt_at_index (km->sais, p[0]);
+
+			  ikev2_complete_sa_data (sa0, sai);
+			  ikev2_calc_keys (sa0);
+			  ikev2_sa_auth_init (sa0);
+			  len = ikev2_generate_message (sa0, ike0, 0);
+			}
+		    }
+
+		  if (sa0->state == IKEV2_STATE_SA_INIT)
+		    {
+		      /* add SA to the pool */
+		      pool_get (km->per_thread_data[thread_index].sas, sa0);
+		      clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
+		      hash_set (km->per_thread_data[thread_index].sa_by_rspi,
+				sa0->rspi,
+				sa0 - km->per_thread_data[thread_index].sas);
+		    }
+		  else
+		    {
+		      ikev2_sa_free_all_vec (sa0);
+		    }
+		}
+	    }
+	  else if (ike0->exchange == IKEV2_EXCHANGE_IKE_AUTH)
+	    {
+	      uword *p;
+	      p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
+			    clib_net_to_host_u64 (ike0->rspi));
+	      if (p)
+		{
+		  sa0 =
+		    pool_elt_at_index (km->per_thread_data[thread_index].sas,
+				       p[0]);
+
+		  r = ikev2_retransmit_resp (sa0, ike0);
+		  if (r == 1)
+		    {
+		      vlib_node_increment_counter (vm, ikev2_node.index,
+						   IKEV2_ERROR_IKE_REQ_RETRANSMIT,
+						   1);
+		      len = clib_net_to_host_u32 (ike0->length);
+		      goto dispatch0;
+		    }
+		  else if (r == -1)
+		    {
+		      vlib_node_increment_counter (vm, ikev2_node.index,
+						   IKEV2_ERROR_IKE_REQ_IGNORE,
+						   1);
+		      goto dispatch0;
+		    }
+
+		  ikev2_process_auth_req (vm, sa0, ike0);
+		  ikev2_sa_auth (sa0);
+		  if (sa0->state == IKEV2_STATE_AUTHENTICATED)
+		    {
+		      ikev2_initial_contact_cleanup (sa0);
+		      ikev2_sa_match_ts (sa0);
+		      if (sa0->state != IKEV2_STATE_TS_UNACCEPTABLE)
+			ikev2_create_tunnel_interface (km->vnet_main, sa0,
+						       &sa0->childs[0]);
+		    }
+
+		  if (sa0->is_initiator)
+		    {
+		      uword *p = hash_get (km->sa_by_ispi, ike0->ispi);
+		      if (p)
+			{
+			  ikev2_sa_t *sai =
+			    pool_elt_at_index (km->sais, p[0]);
+			  hash_unset (km->sa_by_ispi, sai->ispi);
+			  ikev2_sa_free_all_vec (sai);
+			  pool_put (km->sais, sai);
+			}
+		    }
+		  else
+		    {
+		      len = ikev2_generate_message (sa0, ike0, 0);
+		    }
+		}
+	    }
+	  else if (ike0->exchange == IKEV2_EXCHANGE_INFORMATIONAL)
+	    {
+	      uword *p;
+	      p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
+			    clib_net_to_host_u64 (ike0->rspi));
+	      if (p)
+		{
+		  sa0 =
+		    pool_elt_at_index (km->per_thread_data[thread_index].sas,
+				       p[0]);
+
+		  r = ikev2_retransmit_resp (sa0, ike0);
+		  if (r == 1)
+		    {
+		      vlib_node_increment_counter (vm, ikev2_node.index,
+						   IKEV2_ERROR_IKE_REQ_RETRANSMIT,
+						   1);
+		      len = clib_net_to_host_u32 (ike0->length);
+		      goto dispatch0;
+		    }
+		  else if (r == -1)
+		    {
+		      vlib_node_increment_counter (vm, ikev2_node.index,
+						   IKEV2_ERROR_IKE_REQ_IGNORE,
+						   1);
+		      goto dispatch0;
+		    }
+
+		  ikev2_process_informational_req (vm, sa0, ike0);
+		  if (sa0->del)
+		    {
+		      if (sa0->del[0].protocol_id != IKEV2_PROTOCOL_IKE)
+			{
+			  ikev2_delete_t *d, *tmp, *resp = 0;
+			  vec_foreach (d, sa0->del)
+			  {
+			    ikev2_child_sa_t *ch_sa;
+			    ch_sa = ikev2_sa_get_child (sa0, d->spi,
+							d->protocol_id,
+							!sa0->is_initiator);
+			    if (ch_sa)
+			      {
+				ikev2_delete_tunnel_interface (km->vnet_main,
+							       sa0, ch_sa);
+				if (!sa0->is_initiator)
+				  {
+				    vec_add2 (resp, tmp, 1);
+				    tmp->protocol_id = d->protocol_id;
+				    tmp->spi = ch_sa->r_proposals[0].spi;
+				  }
+				ikev2_sa_del_child_sa (sa0, ch_sa);
+			      }
+			  }
+			  if (!sa0->is_initiator)
+			    {
+			      vec_free (sa0->del);
+			      sa0->del = resp;
+			    }
+			}
+		    }
+		  if (!sa0->is_initiator)
+		    {
+		      len = ikev2_generate_message (sa0, ike0, 0);
+		    }
+		}
+	    }
+	  else if (ike0->exchange == IKEV2_EXCHANGE_CREATE_CHILD_SA)
+	    {
+	      uword *p;
+	      p = hash_get (km->per_thread_data[thread_index].sa_by_rspi,
+			    clib_net_to_host_u64 (ike0->rspi));
+	      if (p)
+		{
+		  sa0 =
+		    pool_elt_at_index (km->per_thread_data[thread_index].sas,
+				       p[0]);
+
+		  r = ikev2_retransmit_resp (sa0, ike0);
+		  if (r == 1)
+		    {
+		      vlib_node_increment_counter (vm, ikev2_node.index,
+						   IKEV2_ERROR_IKE_REQ_RETRANSMIT,
+						   1);
+		      len = clib_net_to_host_u32 (ike0->length);
+		      goto dispatch0;
+		    }
+		  else if (r == -1)
+		    {
+		      vlib_node_increment_counter (vm, ikev2_node.index,
+						   IKEV2_ERROR_IKE_REQ_IGNORE,
+						   1);
+		      goto dispatch0;
+		    }
+
+		  ikev2_process_create_child_sa_req (vm, sa0, ike0);
+		  if (sa0->rekey)
+		    {
+		      if (sa0->rekey[0].protocol_id != IKEV2_PROTOCOL_IKE)
+			{
+			  ikev2_child_sa_t *child;
+			  vec_add2 (sa0->childs, child, 1);
+			  child->r_proposals = sa0->rekey[0].r_proposal;
+			  child->i_proposals = sa0->rekey[0].i_proposal;
+			  child->tsi = sa0->rekey[0].tsi;
+			  child->tsr = sa0->rekey[0].tsr;
+			  ikev2_create_tunnel_interface (km->vnet_main, sa0,
+							 child);
+			}
+		      if (sa0->is_initiator)
+			{
+			  vec_del1 (sa0->rekey, 0);
+			}
+		      else
+			{
+			  len = ikev2_generate_message (sa0, ike0, 0);
+			}
+		    }
+		}
+	    }
+	  else
+	    {
+	      clib_warning ("IKEv2 exchange %u packet received from %U to %U",
+			    ike0->exchange,
+			    format_ip4_address, ip40->src_address.as_u8,
+			    format_ip4_address, ip40->dst_address.as_u8);
+	    }
+
+	dispatch0:
+	  /* if we are sending packet back, rewrite headers */
+	  if (len)
+	    {
+	      next0 = IKEV2_NEXT_IP4_LOOKUP;
+	      if (sa0->is_initiator)
+		{
+		  ip40->dst_address.as_u32 = sa0->raddr.as_u32;
+		  ip40->src_address.as_u32 = sa0->iaddr.as_u32;
+		}
+	      else
+		{
+		  ip40->dst_address.as_u32 = sa0->iaddr.as_u32;
+		  ip40->src_address.as_u32 = sa0->raddr.as_u32;
+		}
+	      udp0->length =
+		clib_host_to_net_u16 (len + sizeof (udp_header_t));
+	      udp0->checksum = 0;
+	      b0->current_length =
+		len + sizeof (ip4_header_t) + sizeof (udp_header_t);
+	      ip40->length = clib_host_to_net_u16 (b0->current_length);
+	      ip40->checksum = ip4_header_checksum (ip40);
+	    }
+	  /* delete sa */
+	  if (sa0 && (sa0->state == IKEV2_STATE_DELETED ||
+		      sa0->state == IKEV2_STATE_NOTIFY_AND_DELETE))
+	    {
+	      ikev2_child_sa_t *c;
+
+	      vec_foreach (c, sa0->childs)
+		ikev2_delete_tunnel_interface (km->vnet_main, sa0, c);
+
+	      ikev2_delete_sa (sa0);
+	    }
+	  sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+
+	  if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+			     && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+	    {
+	      ikev2_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
+	      t->sw_if_index = sw_if_index0;
+	      t->next_index = next0;
+	    }
+
+	  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);
+    }
+
+  vlib_node_increment_counter (vm, ikev2_node.index,
+			       IKEV2_ERROR_PROCESSED, frame->n_vectors);
+  return frame->n_vectors;
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (ikev2_node,static) = {
+  .function = ikev2_node_fn,
+  .name = "ikev2",
+  .vector_size = sizeof (u32),
+  .format_trace = format_ikev2_trace,
+  .type = VLIB_NODE_TYPE_INTERNAL,
+
+  .n_errors = ARRAY_LEN(ikev2_error_strings),
+  .error_strings = ikev2_error_strings,
+
+  .n_next_nodes = IKEV2_N_NEXT,
+
+  .next_nodes = {
+    [IKEV2_NEXT_IP4_LOOKUP] = "ip4-lookup",
+        [IKEV2_NEXT_ERROR_DROP] = "error-drop",
+  },
+};
+/* *INDENT-ON* */
+
+// set ikev2 proposals when vpp is used as initiator
+static clib_error_t *
+ikev2_set_initiator_proposals (vlib_main_t * vm, ikev2_sa_t * sa,
+			       ikev2_transforms_set * ts,
+			       ikev2_sa_proposal_t ** proposals, int is_ike)
+{
+  clib_error_t *r;
+  ikev2_main_t *km = &ikev2_main;
+  ikev2_sa_proposal_t *proposal;
+  vec_add2 (*proposals, proposal, 1);
+  ikev2_sa_transform_t *td;
+  int error;
+
+  /* Encryption */
+  error = 1;
+  vec_foreach (td, km->supported_transforms)
+  {
+    if (td->type == IKEV2_TRANSFORM_TYPE_ENCR
+	&& td->encr_type == ts->crypto_alg
+	&& td->key_len == ts->crypto_key_size / 8)
+      {
+	u16 attr[2];
+	attr[0] = clib_host_to_net_u16 (14 | (1 << 15));
+	attr[1] = clib_host_to_net_u16 (td->key_len << 3);
+	vec_add (td->attrs, (u8 *) attr, 4);
+	vec_add1 (proposal->transforms, *td);
+	td->attrs = 0;
+
+	error = 0;
+	break;
+      }
+  }
+  if (error)
+    {
+      r = clib_error_return (0, "Unsupported algorithm");
+      return r;
+    }
+
+  /* Integrity */
+  error = 1;
+  vec_foreach (td, km->supported_transforms)
+  {
+    if (td->type == IKEV2_TRANSFORM_TYPE_INTEG
+	&& td->integ_type == ts->integ_alg)
+      {
+	vec_add1 (proposal->transforms, *td);
+	error = 0;
+	break;
+      }
+  }
+  if (error)
+    {
+      clib_warning
+	("Didn't find any supported algorithm for IKEV2_TRANSFORM_TYPE_INTEG");
+      r = clib_error_return (0, "Unsupported algorithm");
+      return r;
+    }
+
+  /* PRF */
+  if (is_ike)
+    {
+      error = 1;
+      vec_foreach (td, km->supported_transforms)
+      {
+	if (td->type == IKEV2_TRANSFORM_TYPE_PRF
+	    && td->prf_type == IKEV2_TRANSFORM_PRF_TYPE_PRF_HMAC_SHA2_256)
+	  {
+	    vec_add1 (proposal->transforms, *td);
+	    error = 0;
+	    break;
+	  }
+      }
+      if (error)
+	{
+	  r = clib_error_return (0, "Unsupported algorithm");
+	  return r;
+	}
+    }
+
+  /* DH */
+  error = 1;
+  vec_foreach (td, km->supported_transforms)
+  {
+    if (td->type == IKEV2_TRANSFORM_TYPE_DH && td->dh_type == ts->dh_type)
+      {
+	vec_add1 (proposal->transforms, *td);
+	if (is_ike)
+	  {
+	    sa->dh_group = td->dh_type;
+	  }
+	error = 0;
+	break;
+      }
+  }
+  if (error)
+    {
+      r = clib_error_return (0, "Unsupported algorithm");
+      return r;
+    }
+
+  if (!is_ike)
+    {
+      error = 1;
+      vec_foreach (td, km->supported_transforms)
+      {
+	if (td->type == IKEV2_TRANSFORM_TYPE_ESN)
+	  {
+	    vec_add1 (proposal->transforms, *td);
+	    error = 0;
+	    break;
+	  }
+      }
+      if (error)
+	{
+	  r = clib_error_return (0, "Unsupported algorithm");
+	  return r;
+	}
+    }
+
+
+  return 0;
+}
+
+static ikev2_profile_t *
+ikev2_profile_index_by_name (u8 * name)
+{
+  ikev2_main_t *km = &ikev2_main;
+  uword *p;
+
+  p = mhash_get (&km->profile_index_by_name, name);
+  if (!p)
+    return 0;
+
+  return pool_elt_at_index (km->profiles, p[0]);
+}
+
+
+static void
+ikev2_send_ike (vlib_main_t * vm, ip4_address_t * src, ip4_address_t * dst,
+		u32 bi0, u32 len)
+{
+  ip4_header_t *ip40;
+  udp_header_t *udp0;
+  vlib_buffer_t *b0;
+  vlib_frame_t *f;
+  u32 *to_next;
+
+  b0 = vlib_get_buffer (vm, bi0);
+  vlib_buffer_advance (b0, -sizeof (udp_header_t));
+  udp0 = vlib_buffer_get_current (b0);
+  vlib_buffer_advance (b0, -sizeof (ip4_header_t));
+  ip40 = vlib_buffer_get_current (b0);
+
+
+  ip40->ip_version_and_header_length = 0x45;
+  ip40->tos = 0;
+  ip40->fragment_id = 0;
+  ip40->flags_and_fragment_offset = 0;
+  ip40->ttl = 0xff;
+  ip40->protocol = IP_PROTOCOL_UDP;
+  ip40->dst_address.as_u32 = dst->as_u32;
+  ip40->src_address.as_u32 = src->as_u32;
+  udp0->dst_port = clib_host_to_net_u16 (500);
+  udp0->src_port = clib_host_to_net_u16 (500);
+  udp0->length = clib_host_to_net_u16 (len + sizeof (udp_header_t));
+  udp0->checksum = 0;
+  b0->current_length = len + sizeof (ip4_header_t) + sizeof (udp_header_t);
+  ip40->length = clib_host_to_net_u16 (b0->current_length);
+  ip40->checksum = ip4_header_checksum (ip40);
+
+
+  /* send the request */
+  f = vlib_get_frame_to_node (vm, ip4_lookup_node.index);
+  to_next = vlib_frame_vector_args (f);
+  to_next[0] = bi0;
+  f->n_vectors = 1;
+  vlib_put_frame_to_node (vm, ip4_lookup_node.index, f);
+
+}
+
+static u32
+ikev2_get_new_ike_header_buff (vlib_main_t * vm, ike_header_t ** ike)
+{
+  u32 bi0;
+  if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
+    {
+      *ike = 0;
+      return 0;
+    }
+  vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
+  *ike = vlib_buffer_get_current (b0);
+  return bi0;
+}
+
+clib_error_t *
+ikev2_set_local_key (vlib_main_t * vm, u8 * file)
+{
+  ikev2_main_t *km = &ikev2_main;
+
+  km->pkey = ikev2_load_key_file (file);
+  if (km->pkey == NULL)
+    return clib_error_return (0, "load key '%s' failed", file);
+
+  return 0;
+}
+
+clib_error_t *
+ikev2_add_del_profile (vlib_main_t * vm, u8 * name, int is_add)
+{
+  ikev2_main_t *km = &ikev2_main;
+  ikev2_profile_t *p;
+
+  if (is_add)
+    {
+      if (ikev2_profile_index_by_name (name))
+	return clib_error_return (0, "policy %v already exists", name);
+
+      pool_get (km->profiles, p);
+      clib_memset (p, 0, sizeof (*p));
+      p->name = vec_dup (name);
+      p->responder.sw_if_index = ~0;
+      uword index = p - km->profiles;
+      mhash_set_mem (&km->profile_index_by_name, name, &index, 0);
+    }
+  else
+    {
+      p = ikev2_profile_index_by_name (name);
+      if (!p)
+	return clib_error_return (0, "policy %v does not exists", name);
+
+      vec_free (p->name);
+      pool_put (km->profiles, p);
+      mhash_unset (&km->profile_index_by_name, name, 0);
+    }
+  return 0;
+}
+
+clib_error_t *
+ikev2_set_profile_auth (vlib_main_t * vm, u8 * name, u8 auth_method,
+			u8 * auth_data, u8 data_hex_format)
+{
+  ikev2_profile_t *p;
+  clib_error_t *r;
+
+  p = ikev2_profile_index_by_name (name);
+
+  if (!p)
+    {
+      r = clib_error_return (0, "unknown profile %v", name);
+      return r;
+    }
+  vec_free (p->auth.data);
+  p->auth.method = auth_method;
+  p->auth.data = vec_dup (auth_data);
+  p->auth.hex = data_hex_format;
+
+  if (auth_method == IKEV2_AUTH_METHOD_RSA_SIG)
+    {
+      vec_add1 (p->auth.data, 0);
+      if (p->auth.key)
+	EVP_PKEY_free (p->auth.key);
+      p->auth.key = ikev2_load_cert_file (auth_data);
+      if (p->auth.key == NULL)
+	return clib_error_return (0, "load cert '%s' failed", auth_data);
+    }
+
+  return 0;
+}
+
+clib_error_t *
+ikev2_set_profile_id (vlib_main_t * vm, u8 * name, u8 id_type, u8 * data,
+		      int is_local)
+{
+  ikev2_profile_t *p;
+  clib_error_t *r;
+
+  if (id_type > IKEV2_ID_TYPE_ID_RFC822_ADDR
+      && id_type < IKEV2_ID_TYPE_ID_KEY_ID)
+    {
+      r = clib_error_return (0, "unsupported identity type %U",
+			     format_ikev2_id_type, id_type);
+      return r;
+    }
+
+  p = ikev2_profile_index_by_name (name);
+
+  if (!p)
+    {
+      r = clib_error_return (0, "unknown profile %v", name);
+      return r;
+    }
+
+  if (is_local)
+    {
+      vec_free (p->loc_id.data);
+      p->loc_id.type = id_type;
+      p->loc_id.data = vec_dup (data);
+    }
+  else
+    {
+      vec_free (p->rem_id.data);
+      p->rem_id.type = id_type;
+      p->rem_id.data = vec_dup (data);
+    }
+
+  return 0;
+}
+
+clib_error_t *
+ikev2_set_profile_ts (vlib_main_t * vm, u8 * name, u8 protocol_id,
+		      u16 start_port, u16 end_port, ip4_address_t start_addr,
+		      ip4_address_t end_addr, int is_local)
+{
+  ikev2_profile_t *p;
+  clib_error_t *r;
+
+  p = ikev2_profile_index_by_name (name);
+
+  if (!p)
+    {
+      r = clib_error_return (0, "unknown profile %v", name);
+      return r;
+    }
+
+  if (is_local)
+    {
+      p->loc_ts.start_addr.as_u32 = start_addr.as_u32;
+      p->loc_ts.end_addr.as_u32 = end_addr.as_u32;
+      p->loc_ts.start_port = start_port;
+      p->loc_ts.end_port = end_port;
+      p->loc_ts.protocol_id = protocol_id;
+      p->loc_ts.ts_type = 7;
+    }
+  else
+    {
+      p->rem_ts.start_addr.as_u32 = start_addr.as_u32;
+      p->rem_ts.end_addr.as_u32 = end_addr.as_u32;
+      p->rem_ts.start_port = start_port;
+      p->rem_ts.end_port = end_port;
+      p->rem_ts.protocol_id = protocol_id;
+      p->rem_ts.ts_type = 7;
+    }
+
+  return 0;
+}
+
+
+clib_error_t *
+ikev2_set_profile_responder (vlib_main_t * vm, u8 * name,
+			     u32 sw_if_index, ip4_address_t ip4)
+{
+  ikev2_profile_t *p;
+  clib_error_t *r;
+
+  p = ikev2_profile_index_by_name (name);
+
+  if (!p)
+    {
+      r = clib_error_return (0, "unknown profile %v", name);
+      return r;
+    }
+
+  p->responder.sw_if_index = sw_if_index;
+  p->responder.ip4 = ip4;
+
+  return 0;
+}
+
+clib_error_t *
+ikev2_set_profile_ike_transforms (vlib_main_t * vm, u8 * name,
+				  ikev2_transform_encr_type_t crypto_alg,
+				  ikev2_transform_integ_type_t integ_alg,
+				  ikev2_transform_dh_type_t dh_type,
+				  u32 crypto_key_size)
+{
+  ikev2_profile_t *p;
+  clib_error_t *r;
+
+  p = ikev2_profile_index_by_name (name);
+
+  if (!p)
+    {
+      r = clib_error_return (0, "unknown profile %v", name);
+      return r;
+    }
+
+  p->ike_ts.crypto_alg = crypto_alg;
+  p->ike_ts.integ_alg = integ_alg;
+  p->ike_ts.dh_type = dh_type;
+  p->ike_ts.crypto_key_size = crypto_key_size;
+  return 0;
+}
+
+clib_error_t *
+ikev2_set_profile_esp_transforms (vlib_main_t * vm, u8 * name,
+				  ikev2_transform_encr_type_t crypto_alg,
+				  ikev2_transform_integ_type_t integ_alg,
+				  ikev2_transform_dh_type_t dh_type,
+				  u32 crypto_key_size)
+{
+  ikev2_profile_t *p;
+  clib_error_t *r;
+
+  p = ikev2_profile_index_by_name (name);
+
+  if (!p)
+    {
+      r = clib_error_return (0, "unknown profile %v", name);
+      return r;
+    }
+
+  p->esp_ts.crypto_alg = crypto_alg;
+  p->esp_ts.integ_alg = integ_alg;
+  p->esp_ts.dh_type = dh_type;
+  p->esp_ts.crypto_key_size = crypto_key_size;
+  return 0;
+}
+
+clib_error_t *
+ikev2_set_profile_sa_lifetime (vlib_main_t * vm, u8 * name,
+			       u64 lifetime, u32 jitter, u32 handover,
+			       u64 maxdata)
+{
+  ikev2_profile_t *p;
+  clib_error_t *r;
+
+  p = ikev2_profile_index_by_name (name);
+
+  if (!p)
+    {
+      r = clib_error_return (0, "unknown profile %v", name);
+      return r;
+    }
+
+  p->lifetime = lifetime;
+  p->lifetime_jitter = jitter;
+  p->handover = handover;
+  p->lifetime_maxdata = maxdata;
+  return 0;
+}
+
+clib_error_t *
+ikev2_initiate_sa_init (vlib_main_t * vm, u8 * name)
+{
+  ikev2_profile_t *p;
+  clib_error_t *r;
+  ip4_main_t *im = &ip4_main;
+  ikev2_main_t *km = &ikev2_main;
+
+  p = ikev2_profile_index_by_name (name);
+
+  if (!p)
+    {
+      r = clib_error_return (0, "unknown profile %v", name);
+      return r;
+    }
+
+  if (p->responder.sw_if_index == ~0 || p->responder.ip4.data_u32 == 0)
+    {
+      r = clib_error_return (0, "responder not set for profile %v", name);
+      return r;
+    }
+
+
+  /* Create the Initiator Request */
+  {
+    ike_header_t *ike0;
+    u32 bi0 = 0;
+    ip_lookup_main_t *lm = &im->lookup_main;
+    u32 if_add_index0;
+    int len = sizeof (ike_header_t);
+
+    /* Get own iface IP */
+    if_add_index0 =
+      lm->if_address_pool_index_by_sw_if_index[p->responder.sw_if_index];
+    ip_interface_address_t *if_add =
+      pool_elt_at_index (lm->if_address_pool, if_add_index0);
+    ip4_address_t *if_ip = ip_interface_address_get_address (lm, if_add);
+
+    bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
+
+    /* Prepare the SA and the IKE payload */
+    ikev2_sa_t sa;
+    clib_memset (&sa, 0, sizeof (ikev2_sa_t));
+    ikev2_payload_chain_t *chain = 0;
+    ikev2_payload_new_chain (chain);
+
+    /* Build the IKE proposal payload */
+    ikev2_sa_proposal_t *proposals = 0;
+    ikev2_set_initiator_proposals (vm, &sa, &p->ike_ts, &proposals, 1);
+    proposals[0].proposal_num = 1;
+    proposals[0].protocol_id = IKEV2_PROTOCOL_IKE;
+
+    /* Add and then cleanup proposal data */
+    ikev2_payload_add_sa (chain, proposals);
+    ikev2_sa_free_proposal_vector (&proposals);
+
+    sa.is_initiator = 1;
+    sa.profile = p;
+    sa.state = IKEV2_STATE_SA_INIT;
+    ikev2_generate_sa_init_data (&sa);
+    ikev2_payload_add_ke (chain, sa.dh_group, sa.i_dh_data);
+    ikev2_payload_add_nonce (chain, sa.i_nonce);
+
+    /* Build the child SA proposal */
+    vec_resize (sa.childs, 1);
+    ikev2_set_initiator_proposals (vm, &sa, &p->esp_ts,
+				   &sa.childs[0].i_proposals, 0);
+    sa.childs[0].i_proposals[0].proposal_num = 1;
+    sa.childs[0].i_proposals[0].protocol_id = IKEV2_PROTOCOL_ESP;
+    RAND_bytes ((u8 *) & sa.childs[0].i_proposals[0].spi,
+		sizeof (sa.childs[0].i_proposals[0].spi));
+
+
+
+    /* Add NAT detection notification messages (mandatory) */
+    u8 nat_detection_source[8 + 8 + 4 + 2];
+    u8 *nat_detection_sha1 = vec_new (u8, 20);
+
+    u64 tmpspi = clib_host_to_net_u64 (sa.ispi);
+    clib_memcpy_fast (&nat_detection_source[0], &tmpspi, sizeof (tmpspi));
+    tmpspi = clib_host_to_net_u64 (sa.rspi);
+    clib_memcpy_fast (&nat_detection_source[8], &tmpspi, sizeof (tmpspi));
+    u16 tmpport = clib_host_to_net_u16 (500);
+    clib_memcpy_fast (&nat_detection_source[8 + 8 + 4], &tmpport,
+		      sizeof (tmpport));
+    u32 tmpip = clib_host_to_net_u32 (if_ip->as_u32);
+    clib_memcpy_fast (&nat_detection_source[8 + 8], &tmpip, sizeof (tmpip));
+    SHA1 (nat_detection_source, sizeof (nat_detection_source),
+	  nat_detection_sha1);
+    ikev2_payload_add_notify (chain, IKEV2_NOTIFY_MSG_NAT_DETECTION_SOURCE_IP,
+			      nat_detection_sha1);
+    tmpip = clib_host_to_net_u32 (p->responder.ip4.as_u32);
+    clib_memcpy_fast (&nat_detection_source[8 + 8], &tmpip, sizeof (tmpip));
+    SHA1 (nat_detection_source, sizeof (nat_detection_source),
+	  nat_detection_sha1);
+    ikev2_payload_add_notify (chain,
+			      IKEV2_NOTIFY_MSG_NAT_DETECTION_DESTINATION_IP,
+			      nat_detection_sha1);
+    vec_free (nat_detection_sha1);
+
+    u8 *sig_hash_algo = vec_new (u8, 8);
+    u64 tmpsig = clib_host_to_net_u64 (0x0001000200030004);
+    clib_memcpy_fast (sig_hash_algo, &tmpsig, sizeof (tmpsig));
+    ikev2_payload_add_notify (chain,
+			      IKEV2_NOTIFY_MSG_SIGNATURE_HASH_ALGORITHMS,
+			      sig_hash_algo);
+    vec_free (sig_hash_algo);
+
+
+    /* Buffer update and boilerplate */
+    len += vec_len (chain->data);
+    ike0->nextpayload = chain->first_payload_type;
+    ike0->length = clib_host_to_net_u32 (len);
+    clib_memcpy_fast (ike0->payload, chain->data, vec_len (chain->data));
+    ikev2_payload_destroy_chain (chain);
+
+    ike0->version = IKE_VERSION_2;
+    ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
+    ike0->exchange = IKEV2_EXCHANGE_SA_INIT;
+    ike0->ispi = sa.ispi;
+
+    /* store whole IKE payload - needed for PSK auth */
+    vec_free (sa.last_sa_init_req_packet_data);
+    vec_add (sa.last_sa_init_req_packet_data, ike0, len);
+
+    /* add data to the SA then add it to the pool */
+    sa.iaddr.as_u32 = if_ip->as_u32;
+    sa.raddr.as_u32 = p->responder.ip4.as_u32;
+    sa.i_id.type = p->loc_id.type;
+    sa.i_id.data = vec_dup (p->loc_id.data);
+    sa.i_auth.method = p->auth.method;
+    sa.i_auth.hex = p->auth.hex;
+    sa.i_auth.data = vec_dup (p->auth.data);
+#if OPENSSL_VERSION_NUMBER >= 0x10100000L
+    clib_memcpy_fast (sa.i_auth.key, p->auth.key,
+		      EVP_PKEY_size (p->auth.key));
+#else
+    sa.i_auth.key = vec_dup (p->auth.key);
+#endif
+    vec_add (sa.childs[0].tsi, &p->loc_ts, 1);
+    vec_add (sa.childs[0].tsr, &p->rem_ts, 1);
+
+    /* add SA to the pool */
+    ikev2_sa_t *sa0 = 0;
+    pool_get (km->sais, sa0);
+    clib_memcpy_fast (sa0, &sa, sizeof (*sa0));
+    hash_set (km->sa_by_ispi, sa0->ispi, sa0 - km->sais);
+
+    ikev2_send_ike (vm, if_ip, &p->responder.ip4, bi0, len);
+
+  }
+
+  return 0;
+}
+
+static void
+ikev2_delete_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
+				ikev2_child_sa_t * csa)
+{
+  /* Create the Initiator notification for child SA removal */
+  ikev2_main_t *km = &ikev2_main;
+  ike_header_t *ike0;
+  u32 bi0 = 0;
+  int len;
+
+  bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
+
+
+  ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
+  ike0->ispi = clib_host_to_net_u64 (sa->ispi);
+  ike0->rspi = clib_host_to_net_u64 (sa->rspi);
+  vec_resize (sa->del, 1);
+  sa->del->protocol_id = IKEV2_PROTOCOL_ESP;
+  sa->del->spi = csa->i_proposals->spi;
+  ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
+  sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
+  len = ikev2_generate_message (sa, ike0, 0);
+
+  ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len);
+
+  /* delete local child SA */
+  ikev2_delete_tunnel_interface (km->vnet_main, sa, csa);
+  ikev2_sa_del_child_sa (sa, csa);
+}
+
+clib_error_t *
+ikev2_initiate_delete_child_sa (vlib_main_t * vm, u32 ispi)
+{
+  clib_error_t *r;
+  ikev2_main_t *km = &ikev2_main;
+  ikev2_main_per_thread_data_t *tkm;
+  ikev2_sa_t *fsa = 0;
+  ikev2_child_sa_t *fchild = 0;
+
+  /* Search for the child SA */
+  vec_foreach (tkm, km->per_thread_data)
+  {
+    ikev2_sa_t *sa;
+    if (fchild)
+      break;
+    /* *INDENT-OFF* */
+    pool_foreach (sa, tkm->sas, ({
+      fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
+      if (fchild)
+        {
+          fsa = sa;
+          break;
+        }
+    }));
+    /* *INDENT-ON* */
+  }
+
+  if (!fchild || !fsa)
+    {
+      r = clib_error_return (0, "Child SA not found");
+      return r;
+    }
+  else
+    {
+      ikev2_delete_child_sa_internal (vm, fsa, fchild);
+    }
+
+  return 0;
+}
+
+clib_error_t *
+ikev2_initiate_delete_ike_sa (vlib_main_t * vm, u64 ispi)
+{
+  clib_error_t *r;
+  ikev2_main_t *km = &ikev2_main;
+  ikev2_main_per_thread_data_t *tkm;
+  ikev2_sa_t *fsa = 0;
+  ikev2_main_per_thread_data_t *ftkm = 0;
+
+  /* Search for the IKE SA */
+  vec_foreach (tkm, km->per_thread_data)
+  {
+    ikev2_sa_t *sa;
+    if (fsa)
+      break;
+    /* *INDENT-OFF* */
+    pool_foreach (sa, tkm->sas, ({
+      if (sa->ispi == ispi)
+        {
+          fsa = sa;
+          ftkm = tkm;
+          break;
+        }
+    }));
+    /* *INDENT-ON* */
+  }
+
+  if (!fsa)
+    {
+      r = clib_error_return (0, "IKE SA not found");
+      return r;
+    }
+
+
+  /* Create the Initiator notification for IKE SA removal */
+  {
+    ike_header_t *ike0;
+    u32 bi0 = 0;
+    int len;
+
+    bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
+
+
+    ike0->exchange = IKEV2_EXCHANGE_INFORMATIONAL;
+    ike0->ispi = clib_host_to_net_u64 (fsa->ispi);
+    ike0->rspi = clib_host_to_net_u64 (fsa->rspi);
+    vec_resize (fsa->del, 1);
+    fsa->del->protocol_id = IKEV2_PROTOCOL_IKE;
+    fsa->del->spi = ispi;
+    ike0->msgid = clib_host_to_net_u32 (fsa->last_init_msg_id + 1);
+    fsa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
+    len = ikev2_generate_message (fsa, ike0, 0);
+
+    ikev2_send_ike (vm, &fsa->iaddr, &fsa->raddr, bi0, len);
+  }
+
+
+  /* delete local SA */
+  ikev2_child_sa_t *c;
+  vec_foreach (c, fsa->childs)
+  {
+    ikev2_delete_tunnel_interface (km->vnet_main, fsa, c);
+    ikev2_sa_del_child_sa (fsa, c);
+  }
+  ikev2_sa_free_all_vec (fsa);
+  uword *p = hash_get (ftkm->sa_by_rspi, fsa->rspi);
+  if (p)
+    {
+      hash_unset (ftkm->sa_by_rspi, fsa->rspi);
+      pool_put (ftkm->sas, fsa);
+    }
+
+
+  return 0;
+}
+
+static void
+ikev2_rekey_child_sa_internal (vlib_main_t * vm, ikev2_sa_t * sa,
+			       ikev2_child_sa_t * csa)
+{
+  /* Create the Initiator request for create child SA */
+  ike_header_t *ike0;
+  u32 bi0 = 0;
+  int len;
+
+
+  bi0 = ikev2_get_new_ike_header_buff (vm, &ike0);
+
+
+  ike0->version = IKE_VERSION_2;
+  ike0->flags = IKEV2_HDR_FLAG_INITIATOR;
+  ike0->exchange = IKEV2_EXCHANGE_CREATE_CHILD_SA;
+  ike0->ispi = clib_host_to_net_u64 (sa->ispi);
+  ike0->rspi = clib_host_to_net_u64 (sa->rspi);
+  ike0->msgid = clib_host_to_net_u32 (sa->last_init_msg_id + 1);
+  sa->last_init_msg_id = clib_net_to_host_u32 (ike0->msgid);
+
+  ikev2_rekey_t *rekey;
+  vec_add2 (sa->rekey, rekey, 1);
+  ikev2_sa_proposal_t *proposals = vec_dup (csa->i_proposals);
+
+  /*need new ispi */
+  RAND_bytes ((u8 *) & proposals[0].spi, sizeof (proposals[0].spi));
+  rekey->spi = proposals[0].spi;
+  rekey->ispi = csa->i_proposals->spi;
+  len = ikev2_generate_message (sa, ike0, proposals);
+  ikev2_send_ike (vm, &sa->iaddr, &sa->raddr, bi0, len);
+  vec_free (proposals);
+}
+
+clib_error_t *
+ikev2_initiate_rekey_child_sa (vlib_main_t * vm, u32 ispi)
+{
+  clib_error_t *r;
+  ikev2_main_t *km = &ikev2_main;
+  ikev2_main_per_thread_data_t *tkm;
+  ikev2_sa_t *fsa = 0;
+  ikev2_child_sa_t *fchild = 0;
+
+  /* Search for the child SA */
+  vec_foreach (tkm, km->per_thread_data)
+  {
+    ikev2_sa_t *sa;
+    if (fchild)
+      break;
+    /* *INDENT-OFF* */
+    pool_foreach (sa, tkm->sas, ({
+      fchild = ikev2_sa_get_child(sa, ispi, IKEV2_PROTOCOL_ESP, 1);
+      if (fchild)
+        {
+          fsa = sa;
+          break;
+        }
+    }));
+    /* *INDENT-ON* */
+  }
+
+  if (!fchild || !fsa)
+    {
+      r = clib_error_return (0, "Child SA not found");
+      return r;
+    }
+  else
+    {
+      ikev2_rekey_child_sa_internal (vm, fsa, fchild);
+    }
+
+  return 0;
+}
+
+clib_error_t *
+ikev2_init (vlib_main_t * vm)
+{
+  ikev2_main_t *km = &ikev2_main;
+  clib_error_t *error;
+  vlib_thread_main_t *tm = vlib_get_thread_main ();
+  int thread_id;
+
+  if ((error = vlib_call_init_function (vm, ipsec_init)))
+    return error;
+
+  clib_memset (km, 0, sizeof (ikev2_main_t));
+  km->vnet_main = vnet_get_main ();
+  km->vlib_main = vm;
+
+  ikev2_crypto_init (km);
+
+  mhash_init_vec_string (&km->profile_index_by_name, sizeof (uword));
+
+  vec_validate (km->per_thread_data, tm->n_vlib_mains - 1);
+  for (thread_id = 0; thread_id < tm->n_vlib_mains - 1; thread_id++)
+    {
+      km->per_thread_data[thread_id].sa_by_rspi =
+	hash_create (0, sizeof (uword));
+    }
+
+  km->sa_by_ispi = hash_create (0, sizeof (uword));
+
+
+  if ((error = vlib_call_init_function (vm, ikev2_cli_init)))
+    return error;
+
+  udp_register_dst_port (vm, 500, ikev2_node.index, 1);
+
+  return 0;
+}
+
+VLIB_INIT_FUNCTION (ikev2_init);
+
+static u8
+ikev2_mngr_process_child_sa (ikev2_sa_t * sa, ikev2_child_sa_t * csa)
+{
+  ikev2_main_t *km = &ikev2_main;
+  vlib_main_t *vm = km->vlib_main;
+  f64 now = vlib_time_now (vm);
+  u8 res = 0;
+
+  if (sa->is_initiator && sa->profile && csa->time_to_expiration
+      && now > csa->time_to_expiration)
+    {
+      if (!csa->is_expired || csa->rekey_retries > 0)
+	{
+	  ikev2_rekey_child_sa_internal (vm, sa, csa);
+	  csa->time_to_expiration = now + sa->profile->handover;
+	  csa->is_expired = 1;
+	  if (csa->rekey_retries == 0)
+	    {
+	      csa->rekey_retries = 5;
+	    }
+	  else if (csa->rekey_retries > 0)
+	    {
+	      csa->rekey_retries--;
+	      clib_warning ("Rekeying Child SA 0x%x, retries left %d",
+			    csa->i_proposals->spi, csa->rekey_retries);
+	      if (csa->rekey_retries == 0)
+		{
+		  csa->rekey_retries = -1;
+		}
+	    }
+	  res |= 1;
+	}
+      else
+	{
+	  csa->time_to_expiration = 0;
+	  ikev2_delete_child_sa_internal (vm, sa, csa);
+	  res |= 1;
+	}
+    }
+
+  return res;
+}
+
+static void
+ikev2_mngr_process_ipsec_sa (ipsec_sa_t * ipsec_sa)
+{
+  ikev2_main_t *km = &ikev2_main;
+  vlib_main_t *vm = km->vlib_main;
+  ikev2_main_per_thread_data_t *tkm;
+  ikev2_sa_t *fsa = 0;
+  ikev2_child_sa_t *fchild = 0;
+  f64 now = vlib_time_now (vm);
+  vlib_counter_t counts;
+
+  /* Search for the SA and child SA */
+  vec_foreach (tkm, km->per_thread_data)
+  {
+    ikev2_sa_t *sa;
+    if (fchild)
+      break;
+    /* *INDENT-OFF* */
+    pool_foreach (sa, tkm->sas, ({
+      fchild = ikev2_sa_get_child(sa, ipsec_sa->spi, IKEV2_PROTOCOL_ESP, 1);
+      if (fchild)
+        {
+          fsa = sa;
+          break;
+        }
+    }));
+    /* *INDENT-ON* */
+  }
+  vlib_get_combined_counter (&ipsec_sa_counters,
+			     ipsec_sa->stat_index, &counts);
+
+  if (fchild && fsa && fsa->profile && fsa->profile->lifetime_maxdata)
+    {
+      if (!fchild->is_expired
+	  && counts.bytes > fsa->profile->lifetime_maxdata)
+	{
+	  fchild->time_to_expiration = now;
+	}
+    }
+}
+
+static vlib_node_registration_t ikev2_mngr_process_node;
+
+static uword
+ikev2_mngr_process_fn (vlib_main_t * vm, vlib_node_runtime_t * rt,
+		       vlib_frame_t * f)
+{
+  ikev2_main_t *km = &ikev2_main;
+  ipsec_main_t *im = &ipsec_main;
+
+  while (1)
+    {
+      u8 req_sent = 0;
+      vlib_process_wait_for_event_or_clock (vm, 1);
+      vlib_process_get_events (vm, NULL);
+
+      /* process ike child sas */
+      ikev2_main_per_thread_data_t *tkm;
+      vec_foreach (tkm, km->per_thread_data)
+      {
+	ikev2_sa_t *sa;
+        /* *INDENT-OFF* */
+        pool_foreach (sa, tkm->sas, ({
+          ikev2_child_sa_t *c;
+          vec_foreach (c, sa->childs)
+            {
+            req_sent |= ikev2_mngr_process_child_sa(sa, c);
+            }
+        }));
+        /* *INDENT-ON* */
+      }
+
+      /* process ipsec sas */
+      ipsec_sa_t *sa;
+      /* *INDENT-OFF* */
+      pool_foreach (sa, im->sad, ({
+        ikev2_mngr_process_ipsec_sa(sa);
+      }));
+      /* *INDENT-ON* */
+
+      if (req_sent)
+	{
+	  vlib_process_wait_for_event_or_clock (vm, 5);
+	  vlib_process_get_events (vm, NULL);
+	  req_sent = 0;
+	}
+
+    }
+  return 0;
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (ikev2_mngr_process_node, static) = {
+    .function = ikev2_mngr_process_fn,
+    .type = VLIB_NODE_TYPE_PROCESS,
+    .name =
+    "ikev2-manager-process",
+};
+
+VLIB_PLUGIN_REGISTER () = {
+    .version = VPP_BUILD_VER,
+    .description = "IKEv2",
+};
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */