Implement DHCPv6 IA NA client (VPP-1094)

Change-Id: I682a47d6cf9975aca6136188d28ee93eaadf4fe3
Signed-off-by: Juraj Sloboda <jsloboda@cisco.com>

12 files changed, 2502 insertions, 537 deletions

diff --git a/src/vnet/dhcp/dhcp.api b/src/vnet/dhcp/dhcp.api
index ab0f7b60980..ac1e68509e7 100644
--- a/src/vnet/dhcp/dhcp.api
+++ b/src/vnet/dhcp/dhcp.api
@@ -209,6 +209,18 @@ autoreply define dhcp6_clients_enable_disable
   u8 enable;
 };
 
+/** \brief Struct representing DHCPv6 address
+    @param address - address
+    @param valid_time - valid lifetime
+    @param preferred_time - preferred lifetime
+*/
+typeonly define dhcp6_address_info
+{
+  u8 address[16];
+  u32 valid_time;
+  u32 preferred_time;
+};
+
 /** \brief Struct representing DHCPv6 PD prefix
     @param prefix - prefix
     @param prefix_length - prefix length
@@ -223,6 +235,45 @@ typeonly define dhcp6_pd_prefix_info
   u32 preferred_time;
 };
 
+/** \brief Send DHCPv6 client message of specified type
+    @param client_index - opaque cookie to identify the sender
+    @param context - sender context, to match reply w/ request
+    @param sw_if_index - index of TX interface, also identifies IAID
+    @param server_index - used to dentify DHCPv6 server,
+                          unique for each DHCPv6 server on the link,
+                          value obrtained from dhcp6_reply_event API message,
+                          use ~0 to send message to all DHCPv6 servers
+    @param irt - initial retransmission time
+    @param mrt - maximum retransmission time
+    @param mrc - maximum retransmission count
+    @param mrd - maximum retransmission duration
+                         for sending the message
+    @param stop - if non-zero then stop resending the message,
+                  otherwise start sending the message
+    @param msg_type - message type
+    @param T1 - value of T1 in IA_NA option
+    @param T2 - value of T2 in IA_NA option
+    @param n_addresses - number of addresses in IA_NA option
+    @param addresses - list of addresses in IA_NA option
+*/
+autoreply define dhcp6_send_client_message
+{
+  u32 client_index;
+  u32 context;
+  u32 sw_if_index;
+  u32 server_index;
+  u32 irt;
+  u32 mrt;
+  u32 mrc;
+  u32 mrd;
+  u8 stop;
+  u8 msg_type;
+  u32 T1;
+  u32 T2;
+  u32 n_addresses;
+  vl_api_dhcp6_address_info_t addresses[n_addresses];
+};
+
 /** \brief Send DHCPv6 PD client message of specified type
     @param client_index - opaque cookie to identify the sender
     @param context - sender context, to match reply w/ request
@@ -263,10 +314,29 @@ autoreply define dhcp6_pd_send_client_message
 };
 
 service {
+  rpc want_dhcp6_reply_events returns want_dhcp6_reply_events_reply
+    events dhcp6_reply_event;
+};
+
+service {
   rpc want_dhcp6_pd_reply_events returns want_dhcp6_pd_reply_events_reply
     events dhcp6_pd_reply_event;
 };
 
+/** \brief Register for DHCPv6 reply events
+    @param client_index - opaque cookie to identify the sender
+    @param context - sender context, to match reply w/ request
+    @param enable_disable - 1 => register for events, 0 => cancel registration
+    @param pid - sender's pid
+*/
+autoreply define want_dhcp6_reply_events
+{
+  u32 client_index;
+  u32 context;
+  u8 enable_disable;
+  u32 pid;
+};
+
 /** \brief Register for DHCPv6 PD reply events
     @param client_index - opaque cookie to identify the sender
     @param context - sender context, to match reply w/ request
@@ -281,6 +351,37 @@ autoreply define want_dhcp6_pd_reply_events
   u32 pid;
 };
 
+/** \brief Tell client about a DHCPv6 server reply event
+    @param client_index - opaque cookie to identify the sender
+    @param pid - client pid registered to receive notification
+    @param sw_if_index - index of RX interface, also identifies IAID
+    @param server_index - used to dentify DHCPv6 server,
+                          unique for each DHCPv6 server on the link
+    @param msg_type - message type
+    @param T1 - value of T1 in IA_NA option
+    @param T2 - value of T2 in IA_NA option
+    @param inner_status_code - value of status code inside IA_NA option
+    @param status_code - value of status code
+    @param preference - value of preference option in reply message
+    @param n_addresses - number of addresses in IA_NA option
+    @param addresses - list of addresses in IA_NA option
+*/
+define dhcp6_reply_event
+{
+  u32 client_index;
+  u32 pid;
+  u32 sw_if_index;
+  u32 server_index;
+  u8 msg_type;
+  u32 T1;
+  u32 T2;
+  u16 inner_status_code;
+  u16 status_code;
+  u8 preference;
+  u32 n_addresses;
+  vl_api_dhcp6_address_info_t addresses[n_addresses];
+};
+
 /** \brief Tell client about a DHCPv6 PD server reply event
     @param client_index - opaque cookie to identify the sender
     @param pid - client pid registered to receive notification
diff --git a/src/vnet/dhcp/dhcp6_client_common_dp.c b/src/vnet/dhcp/dhcp6_client_common_dp.c
new file mode 100644
index 00000000000..216bf5fa0e4
--- /dev/null
+++ b/src/vnet/dhcp/dhcp6_client_common_dp.c
@@ -0,0 +1,488 @@
+/*
+ * Copyright (c) 2018 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <vnet/dhcp/dhcp6_client_common_dp.h>
+#include <vnet/dhcp/dhcp6_ia_na_client_dp.h>
+#include <vnet/dhcp/dhcp6_pd_client_dp.h>
+#include <vnet/dhcp/dhcp6_packet.h>
+#include <vnet/udp/udp.h>
+
+dhcp6_client_common_main_t dhcp6_client_common_main;
+dhcpv6_duid_ll_string_t client_duid;
+
+u32
+server_index_get_or_create (u8 * data, u16 len)
+{
+  dhcp6_client_common_main_t *ccm = &dhcp6_client_common_main;
+  u32 i;
+  server_id_t *se;
+  server_id_t new_se;
+
+  for (i = 0; i < vec_len (ccm->server_ids); i++)
+    {
+      se = &ccm->server_ids[i];
+      if (se->len == len && 0 == memcmp (se->data, data, len))
+	return i;
+    }
+
+  new_se.len = len;
+  new_se.data = 0;
+  vec_validate (new_se.data, len - 1);
+  memcpy (new_se.data, data, len);
+
+  vec_add1 (ccm->server_ids, new_se);
+
+  return vec_len (ccm->server_ids) - 1;
+}
+
+void
+vl_api_dhcp6_duid_ll_set_t_handler (vl_api_dhcp6_duid_ll_set_t * mp)
+{
+  vl_api_dhcp6_duid_ll_set_reply_t *rmp;
+  dhcpv6_duid_ll_string_t *duid;
+  int rv = 0;
+
+  duid = (dhcpv6_duid_ll_string_t *) mp->duid_ll;
+  if (duid->duid_type != htonl (DHCPV6_DUID_LL))
+    {
+      rv = VNET_API_ERROR_INVALID_VALUE;
+      goto reply;
+    }
+  clib_memcpy (&client_duid, &duid, sizeof (client_duid));
+
+reply:
+  REPLY_MACRO (VL_API_DHCP6_DUID_LL_SET_REPLY);
+}
+
+static void
+generate_client_duid (void)
+{
+  client_duid.duid_type = htons (DHCPV6_DUID_LL);
+  client_duid.hardware_type = htons (1);
+
+  vnet_main_t *vnm = vnet_get_main ();
+  vnet_interface_main_t *im = &vnm->interface_main;
+  vnet_hw_interface_t *hi;
+  ethernet_interface_t *eth_if = 0;
+
+  /* *INDENT-OFF* */
+  pool_foreach (hi, im->hw_interfaces,
+  ({
+    eth_if = ethernet_get_interface (&ethernet_main, hi->hw_if_index);
+    if (eth_if)
+      break;
+  }));
+  /* *INDENT-ON* */
+
+  if (eth_if)
+    clib_memcpy (client_duid.lla, eth_if->address, 6);
+  else
+    {
+      clib_warning ("Failed to find any Ethernet interface, "
+		    "setting DHCPv6 DUID link-layer address to random value");
+      u32 seed = random_default_seed ();
+      random_u32 (&seed);
+      client_duid.lla[0] = 0xc2;	/* locally administered unicast */
+      client_duid.lla[1] = 0x18;
+      client_duid.lla[2] = 0x44;
+      client_duid.lla[3] = random_u32 (&seed);
+      client_duid.lla[4] = random_u32 (&seed);
+      client_duid.lla[5] = random_u32 (&seed);
+    }
+}
+
+#define foreach_dhcpv6_client \
+  _(DROP, "error-drop")       \
+  _(LOOKUP, "ip6-lookup")
+
+typedef enum
+{
+#define _(sym,str) DHCPV6_CLIENT_NEXT_##sym,
+  foreach_dhcpv6_client
+#undef _
+    DHCPV6_CLIENT_N_NEXT,
+} dhcpv6_client_next_t;
+
+/**
+ * per-packet trace data
+ */
+typedef struct dhcpv6_client_trace_t_
+{
+} dhcpv6_client_trace_t;
+
+static u8 *
+format_dhcpv6_client_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 *);
+  //dhcpv6_client_trace_t *t = va_arg (*args, dhcpv6_client_trace_t *);
+
+  s = format (s, "nothing");
+
+  return s;
+}
+
+static uword
+dhcpv6_client_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
+		       vlib_frame_t * frame)
+{
+  dhcp6_ia_na_client_main_t *icm = &dhcp6_ia_na_client_main;
+  dhcp6_pd_client_main_t *pcm = &dhcp6_pd_client_main;
+
+  dhcpv6_client_next_t next_index;
+  u32 n_left_from, *from, *to_next;
+  next_index = 0;
+  n_left_from = frame->n_vectors;
+  from = vlib_frame_vector_args (frame);
+
+  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)
+	{
+	  ip6_header_t *ip0;
+	  u32 options_length;
+	  dhcpv6_header_t *dhcpv60;
+	  dhcpv6_option_t *option;
+	  vlib_buffer_t *b0;
+	  dhcp6_report_common_t report;
+	  dhcp6_address_info_t *addresses = 0;
+	  dhcp6_prefix_info_t *prefixes = 0;
+	  u32 next0 = DHCPV6_CLIENT_NEXT_DROP;
+	  u32 bi0;
+	  u32 xid;
+	  u32 sw_if_index;
+	  u32 iaid;
+	  u8 client_id_present = 0;
+	  u8 discard = 0;
+	  u8 is_pd_packet = 0;
+
+	  dhcp6_ia_na_client_state_t *ia_na_client_state = NULL;
+	  dhcp6_pd_client_state_t *pd_client_state = NULL;
+
+	  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);
+
+	  dhcpv60 = vlib_buffer_get_current (b0);
+	  ip0 = (void *) (b0->data + vnet_buffer (b0)->l3_hdr_offset);
+	  u32 dhcpv6_ip6_palyoad_offset =
+	    (u8 *) dhcpv60 - ((u8 *) ip0 + sizeof (*ip0));
+	  options_length =
+	    ntohs (ip0->payload_length) - dhcpv6_ip6_palyoad_offset -
+	    sizeof (*dhcpv60);
+
+	  memset (&report, 0, sizeof (report));
+
+	  sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+	  if (sw_if_index >= vec_len (icm->client_state_by_sw_if_index))
+	    ia_na_client_state = 0;
+	  else
+	    ia_na_client_state =
+	      &icm->client_state_by_sw_if_index[sw_if_index];
+	  if (sw_if_index >= vec_len (pcm->client_state_by_sw_if_index))
+	    pd_client_state = 0;
+	  else
+	    pd_client_state = &pcm->client_state_by_sw_if_index[sw_if_index];
+
+	  xid =
+	    (dhcpv60->xid[0] << 16) + (dhcpv60->xid[1] << 8) +
+	    dhcpv60->xid[2];
+	  if (ia_na_client_state && ia_na_client_state->transaction_id == xid)
+	    is_pd_packet = 0;
+	  else if (pd_client_state && pd_client_state->transaction_id == xid)
+	    is_pd_packet = 1;
+	  else
+	    {
+	      clib_warning
+		("Received DHCPv6 message with wrong Transaction ID");
+	      discard = 1;
+	    }
+
+	  report.sw_if_index = sw_if_index;
+	  report.msg_type = dhcpv60->msg_type;
+	  report.server_index = ~0;
+
+	  switch (dhcpv60->msg_type)
+	    {
+	    case DHCPV6_MSG_ADVERTISE:
+	    case DHCPV6_MSG_REPLY:
+	      option = (dhcpv6_option_t *) (dhcpv60 + 1);
+	      while (options_length > 0)
+		{
+		  if (options_length <
+		      ntohs (option->length) + sizeof (*option))
+		    {
+		      clib_warning
+			("remaining payload length < option length (%d < %d)",
+			 options_length,
+			 ntohs (option->length) + sizeof (*option));
+		      break;
+		    }
+		  u16 oo = ntohs (option->option);
+		  if (oo == DHCPV6_OPTION_IA_NA || oo == DHCPV6_OPTION_IA_PD)
+		    {
+		      u8 discard_option = 0;
+		      dhcpv6_ia_header_t *ia_header = (void *) option;
+		      iaid = ntohl (ia_header->iaid);
+		      u32 T1 = ntohl (ia_header->t1);
+		      u32 T2 = ntohl (ia_header->t2);
+		      if (iaid != DHCPV6_CLIENT_IAID)
+			discard_option = 1;
+		      if (T1 != 0 && T2 != 0 && T1 > T2)
+			discard_option = 1;
+		      if (!discard_option)
+			{
+			  report.T1 = T1;
+			  report.T2 = T2;
+			}
+		      dhcpv6_option_t *inner_option =
+			(void *) ia_header->data;
+		      u16 inner_options_length =
+			ntohs (option->length) - (sizeof (*ia_header) -
+						  sizeof (dhcpv6_option_t));
+		      while (inner_options_length > 0)
+			{
+			  u16 inner_oo = ntohs (inner_option->option);
+			  if (discard_option)
+			    ;
+			  else if (inner_oo == DHCPV6_OPTION_IAADDR)
+			    {
+			      dhcpv6_ia_opt_addr_t *iaaddr =
+				(void *) inner_option;
+			      u32 n_addresses = vec_len (addresses);
+			      vec_validate (addresses, n_addresses);
+			      dhcp6_address_info_t *address_info =
+				&addresses[n_addresses];
+			      address_info->preferred_time =
+				ntohl (iaaddr->preferred);
+			      address_info->valid_time =
+				ntohl (iaaddr->valid);
+			      address_info->address = iaaddr->addr;
+			    }
+			  else if (inner_oo == DHCPV6_OPTION_IAPREFIX)
+			    {
+			      dhcpv6_ia_opt_pd_t *iaprefix =
+				(void *) inner_option;
+			      u32 n_prefixes = vec_len (prefixes);
+			      vec_validate (prefixes, n_prefixes);
+			      dhcp6_prefix_info_t *prefix_info =
+				&prefixes[n_prefixes];
+			      prefix_info->preferred_time =
+				ntohl (iaprefix->preferred);
+			      prefix_info->valid_time =
+				ntohl (iaprefix->valid);
+			      prefix_info->prefix_length = iaprefix->prefix;
+			      prefix_info->prefix = iaprefix->addr;
+			    }
+			  else if (inner_oo == DHCPV6_OPTION_STATUS_CODE)
+			    {
+			      dhcpv6_status_code_t *sc =
+				(void *) inner_option;
+			      report.inner_status_code =
+				ntohs (sc->status_code);
+			    }
+			  inner_options_length -=
+			    sizeof (*inner_option) +
+			    ntohs (inner_option->length);
+			  inner_option =
+			    (void *) ((u8 *) inner_option +
+				      sizeof (*inner_option) +
+				      ntohs (inner_option->length));
+			}
+		    }
+		  else if (oo == DHCPV6_OPTION_CLIENTID)
+		    {
+		      if (client_id_present)
+			{
+			  clib_warning
+			    ("Duplicate Client ID in received DHVPv6 message");
+			  discard = 1;
+			}
+		      else
+			{
+			  u16 len = ntohs (option->length);
+			  client_id_present = 1;
+			  if (len != CLIENT_DUID_LENGTH ||
+			      0 != memcmp (option->data,
+					   client_duid.bin_string,
+					   CLIENT_DUID_LENGTH))
+			    {
+			      clib_warning
+				("Unrecognized client DUID inside received DHVPv6 message");
+			      discard = 1;
+			    }
+			}
+		    }
+		  else if (oo == DHCPV6_OPTION_SERVERID)
+		    {
+		      if (report.server_index != ~0)
+			{
+			  clib_warning
+			    ("Duplicate Server ID in received DHVPv6 message");
+			  discard = 1;
+			}
+		      else
+			{
+			  u16 ol = ntohs (option->length);
+			  if (ol - 2 /* 2 byte DUID type code */  > 128)
+			    {
+			      clib_warning
+				("Server DUID (without type code) is longer than 128 octets");
+			      discard = 1;
+			    }
+			  else
+			    {
+			      report.server_index =
+				server_index_get_or_create (option->data, ol);
+			    }
+			}
+		    }
+		  else if (oo == DHCPV6_OPTION_PREFERENCE)
+		    {
+		      report.preference = option->data[0];
+		    }
+		  else if (oo == DHCPV6_OPTION_STATUS_CODE)
+		    {
+		      dhcpv6_status_code_t *sc = (void *) option;
+		      report.status_code = ntohs (sc->status_code);
+		    }
+		  options_length -= sizeof (*option) + ntohs (option->length);
+		  option =
+		    (void *) ((u8 *) option + sizeof (*option) +
+			      ntohs (option->length));
+		}
+
+	      if (!client_id_present)
+		{
+		  clib_warning
+		    ("Missing Client ID in received DHVPv6 message");
+		  discard = 1;
+		}
+	      if (report.server_index == ~0)
+		{
+		  clib_warning
+		    ("Missing Server ID in received DHVPv6 message");
+		  discard = 1;
+		}
+
+	      if (!discard)
+		{
+		  if (!is_pd_packet)
+		    {
+		      address_report_t r;
+		      r.body = report;
+		      r.n_addresses = vec_len (addresses);
+		      r.addresses = addresses;
+		      dhcp6_publish_report (&r);
+		    }
+		  else
+		    {
+		      prefix_report_t r;
+		      r.body = report;
+		      r.n_prefixes = vec_len (prefixes);
+		      r.prefixes = prefixes;
+		      dhcp6_pd_publish_report (&r);
+		    }
+		}
+	      vec_free (addresses);
+	      vec_free (prefixes);
+
+	      break;
+	    default:
+	      break;
+	    }
+
+	  if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
+	    {
+	      dhcpv6_client_trace_t *t =
+		vlib_add_trace (vm, node, b0, sizeof (*t));
+	    }
+
+	  /* verify speculative enqueue, maybe switch current next frame */
+	  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);
+    }
+
+  return frame->n_vectors;
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (dhcpv6_client_node, static) = {
+    .function = dhcpv6_client_node_fn,
+    .name = "dhcpv6-client",
+    .vector_size = sizeof (u32),
+
+    .n_errors = 0,
+
+    .n_next_nodes = DHCPV6_CLIENT_N_NEXT,
+    .next_nodes = {
+  #define _(s,n) [DHCPV6_CLIENT_NEXT_##s] = n,
+      foreach_dhcpv6_client
+  #undef _
+    },
+
+    .format_trace = format_dhcpv6_client_trace,
+};
+/* *INDENT-ON* */
+
+void
+dhcp6_clients_enable_disable (u8 enable)
+{
+  vlib_main_t *vm = vlib_get_main ();
+
+  if (enable)
+    {
+      if (client_duid.duid_type == 0)
+	generate_client_duid ();
+      udp_register_dst_port (vm, UDP_DST_PORT_dhcpv6_to_client,
+			     dhcpv6_client_node.index, 0 /* is_ip6 */ );
+    }
+  else
+    udp_unregister_dst_port (vm, UDP_DST_PORT_dhcpv6_to_client,
+			     0 /* is_ip6 */ );
+}
+
+void
+  vl_api_dhcp6_clients_enable_disable_t_handler
+  (vl_api_dhcp6_clients_enable_disable_t * mp)
+{
+  vl_api_dhcp6_clients_enable_disable_reply_t *rmp;
+  int rv = 0;
+
+  dhcp6_clients_enable_disable (mp->enable);
+
+  REPLY_MACRO (VL_API_DHCP6_CLIENTS_ENABLE_DISABLE_REPLY);
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/src/vnet/dhcp/dhcp6_client_common_dp.h b/src/vnet/dhcp/dhcp6_client_common_dp.h
new file mode 100644
index 00000000000..0acef8408c6
--- /dev/null
+++ b/src/vnet/dhcp/dhcp6_client_common_dp.h
@@ -0,0 +1,118 @@
+/*
+ * Copyright (c) 2018 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.
+ */
+
+#ifndef included_vnet_dhcp6_client_common_dp_h
+#define included_vnet_dhcp6_client_common_dp_h
+
+#include <vlib/vlib.h>
+#include <vnet/dhcp/dhcp6_client_common_dp.h>
+#include <vnet/dhcp/dhcp6_packet.h>
+#include <vnet/vnet_msg_enum.h>
+#include <vlibapi/api_common.h>
+#include <vlibmemory/api.h>
+
+#define vl_typedefs		/* define message structures */
+#include <vnet/vnet_all_api_h.h>
+#undef vl_typedefs
+
+#define vl_endianfun		/* define message structures */
+#include <vnet/vnet_all_api_h.h>
+#undef vl_endianfun
+
+/* instantiate all the print functions we know about */
+#define vl_print(handle, ...) vlib_cli_output (handle, __VA_ARGS__)
+#define vl_printfun
+#include <vnet/vnet_all_api_h.h>
+#undef vl_printfun
+
+#include <vlibapi/api_helper_macros.h>
+
+typedef struct
+{
+  u32 sw_if_index;
+  u32 server_index;
+  u8 msg_type;
+  u32 T1;
+  u32 T2;
+  u16 inner_status_code;
+  u16 status_code;
+  u8 preference;
+} dhcp6_report_common_t;
+
+typedef struct
+{
+  u8 *data;
+  u16 len;
+} server_id_t;
+
+typedef struct
+{
+  server_id_t *server_ids;
+} dhcp6_client_common_main_t;
+
+extern dhcp6_client_common_main_t dhcp6_client_common_main;
+
+typedef union
+{
+  CLIB_PACKED (struct
+	       {
+	       u16 duid_type;
+	       u16 hardware_type;
+	       u8 lla[6];
+	       });
+  char bin_string[10];
+} dhcpv6_duid_ll_string_t;
+
+extern dhcpv6_duid_ll_string_t client_duid;
+#define CLIENT_DUID_LENGTH sizeof (client_duid)
+#define DHCPV6_CLIENT_IAID 1
+
+void dhcp6_clients_enable_disable (u8 enable);
+u32 server_index_get_or_create (u8 * data, u16 len);
+
+#define vl_typedefs		/* define message structures */
+#include <vnet/vnet_all_api_h.h>
+#undef vl_typedefs
+
+void vl_api_dhcp6_duid_ll_set_t_handler (vl_api_dhcp6_duid_ll_set_t * mp);
+
+static_always_inline f64
+random_f64_from_to (f64 from, f64 to)
+{
+  static u32 seed = 0;
+  static u8 seed_set = 0;
+  if (!seed_set)
+    {
+      seed = random_default_seed ();
+      seed_set = 1;
+    }
+  return random_f64 (&seed) * (to - from) + from;
+}
+
+static const ip6_address_t all_dhcp6_relay_agents_and_servers = {
+  .as_u8 = {
+	    0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	    0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x02}
+};
+
+#endif /* included_vnet_dhcp6_client_common_dp_h */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/src/vnet/dhcp/dhcp6_ia_na_client_cp.api b/src/vnet/dhcp/dhcp6_ia_na_client_cp.api
new file mode 100644
index 00000000000..6dd67384aec
--- /dev/null
+++ b/src/vnet/dhcp/dhcp6_ia_na_client_cp.api
@@ -0,0 +1,36 @@
+/*
+ * Copyright (c) 2018 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.
+ */
+
+option version = "1.0.0";
+
+/** \brief Enable/disable DHCPv6 client on interface
+    @param client_index - opaque cookie to identify the sender
+    @param context - sender context, to match reply w/ request
+    @param sw_if_index - interface to enable/disable client on
+    @param enable - 1 to enable, 0 to disable
+*/
+autoreply define dhcp6_client_enable_disable
+{
+  u32 client_index;
+  u32 context;
+  u32 sw_if_index;
+  u8 enable;
+};
+
+/*
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/src/vnet/dhcp/dhcp6_ia_na_client_cp.c b/src/vnet/dhcp/dhcp6_ia_na_client_cp.c
new file mode 100644
index 00000000000..e83eecc17c3
--- /dev/null
+++ b/src/vnet/dhcp/dhcp6_ia_na_client_cp.c
@@ -0,0 +1,831 @@
+/*
+ * Copyright (c) 2018 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <vnet/vnet.h>
+#include <vlibmemory/api.h>
+#include <vnet/vnet_msg_enum.h>
+#include <vnet/dhcp/dhcp6_packet.h>
+#include <vnet/dhcp/dhcp6_ia_na_client_dp.h>
+#include <vnet/ip/ip.h>
+#include <vnet/ip/ip6.h>
+#include <float.h>
+#include <math.h>
+
+#define vl_typedefs		/* define message structures */
+#include <vnet/vnet_all_api_h.h>
+#undef vl_typedefs
+
+#define vl_endianfun		/* define message structures */
+#include <vnet/vnet_all_api_h.h>
+#undef vl_endianfun
+
+#include <vlibapi/api_helper_macros.h>
+
+#define foreach_dhcp6_client_cp_msg                                           \
+_(DHCP6_CLIENT_ENABLE_DISABLE, dhcp6_client_enable_disable)
+
+#define vl_api_dhcp6_client_enable_disable_t_print vl_noop_handler
+
+typedef struct
+{
+  u32 sw_if_index;
+  ip6_address_t address;
+  u32 preferred_lt;
+  u32 valid_lt;
+  f64 due_time;
+} address_info_t;
+
+typedef struct
+{
+  u8 enabled;
+  u32 server_index;
+  u32 T1;
+  u32 T2;
+  f64 T1_due_time;
+  f64 T2_due_time;
+  u32 address_count;
+  u8 rebinding;
+} client_state_t;
+
+typedef struct
+{
+  address_info_t *address_pool;
+  client_state_t *client_state_by_sw_if_index;
+  u32 n_clients;
+  f64 max_valid_due_time;
+
+  /* convenience */
+  vlib_main_t *vlib_main;
+  vnet_main_t *vnet_main;
+  api_main_t *api_main;
+  u32 node_index;
+} dhcp6_client_cp_main_t;
+
+static dhcp6_client_cp_main_t dhcp6_client_cp_main;
+
+enum
+{
+  RD_CP_EVENT_INTERRUPT,
+  RD_CP_EVENT_DISABLE,
+};
+
+static void
+send_client_message_start_stop (u32 sw_if_index, u32 server_index,
+				u8 msg_type, address_info_t * address_list,
+				u8 start)
+{
+  dhcp6_client_cp_main_t *rm = &dhcp6_client_cp_main;
+  dhcp6_send_client_message_params_t params = { 0, };
+  dhcp6_send_client_message_params_address_t *addresses = 0, *addr;
+  u32 i;
+
+  ASSERT (sw_if_index < vec_len (rm->client_state_by_sw_if_index) &&
+	  rm->client_state_by_sw_if_index[sw_if_index].enabled);
+  client_state_t *client_state =
+    &rm->client_state_by_sw_if_index[sw_if_index];
+
+  params.sw_if_index = sw_if_index;
+  params.server_index = server_index;
+  params.msg_type = msg_type;
+  if (start)
+    {
+      if (msg_type == DHCPV6_MSG_SOLICIT)
+	{
+	  params.irt = 1;
+	  params.mrt = 120;
+	}
+      else if (msg_type == DHCPV6_MSG_REQUEST)
+	{
+	  params.irt = 1;
+	  params.mrt = 30;
+	  params.mrc = 10;
+	}
+      else if (msg_type == DHCPV6_MSG_RENEW)
+	{
+	  params.irt = 10;
+	  params.mrt = 600;
+	  f64 current_time = vlib_time_now (rm->vlib_main);
+	  i32 diff_time = client_state->T2 - current_time;
+	  if (diff_time < 0)
+	    diff_time = 0;
+	  params.mrd = diff_time;
+	}
+      else if (msg_type == DHCPV6_MSG_REBIND)
+	{
+	  params.irt = 10;
+	  params.mrt = 600;
+	  f64 current_time = vlib_time_now (rm->vlib_main);
+	  i32 diff_time = rm->max_valid_due_time - current_time;
+	  if (diff_time < 0)
+	    diff_time = 0;
+	  params.mrd = diff_time;
+	}
+      else if (msg_type == DHCPV6_MSG_RELEASE)
+	{
+	  params.mrc = 1;
+	}
+    }
+
+  params.T1 = 0;
+  params.T2 = 0;
+  if (vec_len (address_list) != 0)
+    vec_validate (addresses, vec_len (address_list) - 1);
+  for (i = 0; i < vec_len (address_list); i++)
+    {
+      address_info_t *address = &address_list[i];
+      addr = &addresses[i];
+      addr->valid_lt = address->valid_lt;
+      addr->preferred_lt = address->preferred_lt;
+      addr->address = address->address;
+    }
+  params.addresses = addresses;
+
+  dhcp6_send_client_message (rm->vlib_main, sw_if_index, !start, &params);
+
+  vec_free (params.addresses);
+}
+
+static void interrupt_process (void);
+
+static u32
+ip6_enable (u32 sw_if_index)
+{
+  dhcp6_client_cp_main_t *rm = &dhcp6_client_cp_main;
+  clib_error_t *rv;
+
+  rv = enable_ip6_interface (rm->vlib_main, sw_if_index);
+
+  return rv != 0;
+}
+
+static u8
+ip6_addresses_equal (ip6_address_t * address1, ip6_address_t * address2)
+{
+  if (address1->as_u64[0] != address2->as_u64[0])
+    return 0;
+  return address1->as_u64[1] == address2->as_u64[1];
+}
+
+static clib_error_t *
+dhcp6_reply_event_handler (vl_api_dhcp6_reply_event_t * mp)
+{
+  dhcp6_client_cp_main_t *rm = &dhcp6_client_cp_main;
+  vlib_main_t *vm = rm->vlib_main;
+  client_state_t *client_state;
+  ip6_address_t *address;
+  u32 sw_if_index;
+  u32 n_addresses;
+  vl_api_dhcp6_address_info_t *api_address;
+  u32 inner_status_code;
+  u32 status_code;
+  u32 server_index;
+  f64 current_time;
+  clib_error_t *error = 0;
+  u32 i;
+
+  current_time = vlib_time_now (vm);
+
+  sw_if_index = ntohl (mp->sw_if_index);
+
+  if (sw_if_index >= vec_len (rm->client_state_by_sw_if_index))
+    return 0;
+
+  client_state = &rm->client_state_by_sw_if_index[sw_if_index];
+
+  if (!client_state->enabled)
+    return 0;
+
+  server_index = ntohl (mp->server_index);
+
+  n_addresses = ntohl (mp->n_addresses);
+
+  inner_status_code = ntohs (mp->inner_status_code);
+  status_code = ntohs (mp->status_code);
+
+  if (mp->msg_type == DHCPV6_MSG_ADVERTISE
+      && client_state->server_index == ~0)
+    {
+      address_info_t *address_list = 0, *address_info;
+
+      if (inner_status_code == DHCPV6_STATUS_NOADDRS_AVAIL)
+	{
+	  clib_warning
+	    ("Advertise message arrived with NoAddrsAvail status code");
+	  return 0;
+	}
+
+      if (n_addresses > 0)
+	vec_validate (address_list, n_addresses - 1);
+      for (i = 0; i < n_addresses; i++)
+	{
+	  api_address = &mp->addresses[i];
+	  address = (ip6_address_t *) api_address->address;
+
+	  address_info = &address_list[i];
+	  address_info->address = *address;
+	  address_info->preferred_lt = 0;
+	  address_info->valid_lt = 0;
+	}
+
+      client_state->server_index = server_index;
+
+      send_client_message_start_stop (sw_if_index, server_index,
+				      DHCPV6_MSG_REQUEST, address_list, 1);
+      vec_free (address_list);
+    }
+
+  if (mp->msg_type != DHCPV6_MSG_REPLY)
+    return 0;
+
+  if (!client_state->rebinding && client_state->server_index != server_index)
+    {
+      clib_warning ("Reply message arrived with Server ID different "
+		    "from that in Request or Renew message");
+      return 0;
+    }
+
+  if (inner_status_code == DHCPV6_STATUS_NOADDRS_AVAIL)
+    {
+      clib_warning ("Reply message arrived with NoAddrsAvail status code");
+      if (n_addresses > 0)
+	{
+	  clib_warning
+	    ("Invalid Reply message arrived: It contains NoAddrsAvail "
+	     "status code but also contains addresses");
+	  return 0;
+	}
+    }
+
+  if (status_code == DHCPV6_STATUS_UNSPEC_FAIL)
+    {
+      clib_warning ("Reply message arrived with UnspecFail status code");
+      return 0;
+    }
+
+  send_client_message_start_stop (sw_if_index, server_index,
+				  mp->msg_type, 0, 0);
+
+  for (i = 0; i < n_addresses; i++)
+    {
+      address_info_t *address_info = 0;
+      u32 valid_time;
+      u32 preferred_time;
+
+      api_address = &mp->addresses[i];
+
+      address = (ip6_address_t *) api_address->address;
+
+      if (ip6_address_is_link_local_unicast (address))
+	continue;
+
+      valid_time = ntohl (api_address->valid_time);
+      preferred_time = ntohl (api_address->preferred_time);
+
+      if (preferred_time > valid_time)
+	continue;
+
+      u8 address_already_present = 0;
+      /* *INDENT-OFF* */
+      pool_foreach (address_info, rm->address_pool,
+      ({
+        if (address_info->sw_if_index != sw_if_index)
+          ;
+        else if (!ip6_addresses_equal (&address_info->address, address))
+          ;
+        else
+          {
+            address_already_present = 1;
+            goto address_pool_foreach_out;
+          }
+      }));
+      /* *INDENT-ON* */
+    address_pool_foreach_out:
+
+      if (address_already_present)
+	{
+	  address_info->preferred_lt = preferred_time;
+	  address_info->valid_lt = valid_time;
+	  address_info->due_time = current_time + valid_time;
+	  if (address_info->due_time > rm->max_valid_due_time)
+	    rm->max_valid_due_time = address_info->due_time;
+	  continue;
+	}
+
+      if (valid_time == 0)
+	continue;
+
+      pool_get (rm->address_pool, address_info);
+      address_info->sw_if_index = sw_if_index;
+      address_info->address = *address;
+      address_info->preferred_lt = preferred_time;
+      address_info->valid_lt = valid_time;
+      address_info->due_time = current_time + valid_time;
+      if (address_info->due_time > rm->max_valid_due_time)
+	rm->max_valid_due_time = address_info->due_time;
+      rm->client_state_by_sw_if_index[sw_if_index].address_count++;
+
+      error = ip6_add_del_interface_address (vm, sw_if_index,
+					     &address_info->address, 64, 0);
+      if (error)
+	clib_warning ("Failed to add interface address");
+    }
+
+  client_state->server_index = server_index;
+  client_state->T1 = ntohl (mp->T1);
+  client_state->T2 = ntohl (mp->T2);
+  if (client_state->T1 != 0)
+    client_state->T1_due_time = current_time + client_state->T1;
+  if (client_state->T2 != 0)
+    client_state->T2_due_time = current_time + client_state->T2;
+  client_state->rebinding = 0;
+
+  interrupt_process ();
+
+  return error;
+}
+
+static address_info_t *
+create_address_list (u32 sw_if_index)
+{
+  dhcp6_client_cp_main_t *rm = &dhcp6_client_cp_main;
+  address_info_t *address_info, *address_list = 0;;
+
+  /* *INDENT-OFF* */
+  pool_foreach (address_info, rm->address_pool,
+  ({
+    if (address_info->sw_if_index == sw_if_index)
+      {
+        u32 pos = vec_len (address_list);
+        vec_validate (address_list, pos);
+        clib_memcpy (&address_list[pos], address_info, sizeof (*address_info));
+      }
+  }));
+  /* *INDENT-ON* */
+
+  return address_list;
+}
+
+VNET_DHCP6_REPLY_EVENT_FUNCTION (dhcp6_reply_event_handler);
+
+static uword
+dhcp6_client_cp_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
+			 vlib_frame_t * f)
+{
+  dhcp6_client_cp_main_t *rm = &dhcp6_client_cp_main;
+  address_info_t *address_info;
+  client_state_t *client_state;
+  f64 sleep_time = 1e9;
+  clib_error_t *error;
+  f64 current_time;
+  f64 due_time;
+  uword event_type;
+  uword *event_data = 0;
+  int i;
+
+  while (1)
+    {
+      vlib_process_wait_for_event_or_clock (vm, sleep_time);
+      event_type = vlib_process_get_events (vm, &event_data);
+      vec_reset_length (event_data);
+
+      if (event_type == RD_CP_EVENT_DISABLE)
+	{
+	  vlib_node_set_state (vm, rm->node_index, VLIB_NODE_STATE_DISABLED);
+	  sleep_time = 1e9;
+	  continue;
+	}
+
+      current_time = vlib_time_now (vm);
+      do
+	{
+	  due_time = current_time + 1e9;
+          /* *INDENT-OFF* */
+          pool_foreach (address_info, rm->address_pool,
+          ({
+            if (address_info->due_time > current_time)
+              {
+                if (address_info->due_time < due_time)
+                  due_time = address_info->due_time;
+              }
+            else
+              {
+                u32 sw_if_index = address_info->sw_if_index;
+                error = ip6_add_del_interface_address (vm, sw_if_index,
+                                                       &address_info->address,
+                                                       64, 1);
+                if (error)
+                    clib_warning ("Failed to delete interface address");
+                pool_put (rm->address_pool, address_info);
+                /* make sure ip6 stays enabled */
+                ip6_enable (sw_if_index);
+                client_state = &rm->client_state_by_sw_if_index[sw_if_index];
+                if (--client_state->address_count == 0)
+                  {
+                    client_state->rebinding = 0;
+                    client_state->server_index = ~0;
+                    send_client_message_start_stop (sw_if_index, ~0,
+                                                    DHCPV6_MSG_SOLICIT,
+                                                    0, 1);
+                  }
+              }
+          }));
+          /* *INDENT-ON* */
+	  for (i = 0; i < vec_len (rm->client_state_by_sw_if_index); i++)
+	    {
+	      client_state_t *cs = &rm->client_state_by_sw_if_index[i];
+	      if (cs->enabled && cs->server_index != ~0)
+		{
+		  if (cs->T2_due_time > current_time)
+		    {
+		      if (cs->T2_due_time < due_time)
+			due_time = cs->T2_due_time;
+		      if (cs->T1_due_time > current_time)
+			{
+			  if (cs->T1_due_time < due_time)
+			    due_time = cs->T1_due_time;
+			}
+		      else
+			{
+			  cs->T1_due_time = DBL_MAX;
+			  address_info_t *address_list;
+			  address_list = create_address_list (i);
+			  cs->rebinding = 1;
+			  send_client_message_start_stop (i, cs->server_index,
+							  DHCPV6_MSG_RENEW,
+							  address_list, 1);
+			  vec_free (address_list);
+			}
+		    }
+		  else
+		    {
+		      cs->T2_due_time = DBL_MAX;
+		      address_info_t *address_list;
+		      address_list = create_address_list (i);
+		      cs->rebinding = 1;
+		      send_client_message_start_stop (i, ~0,
+						      DHCPV6_MSG_REBIND,
+						      address_list, 1);
+		      vec_free (address_list);
+		    }
+		}
+	    }
+	  current_time = vlib_time_now (vm);
+	}
+      while (due_time < current_time);
+
+      sleep_time = due_time - current_time;
+    }
+
+  return 0;
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (dhcp6_client_cp_process_node) = {
+    .function = dhcp6_client_cp_process,
+    .type = VLIB_NODE_TYPE_PROCESS,
+    .name = "dhcp6-client-cp-process",
+};
+/* *INDENT-ON* */
+
+static void
+interrupt_process (void)
+{
+  dhcp6_client_cp_main_t *rm = &dhcp6_client_cp_main;
+  vlib_main_t *vm = rm->vlib_main;
+
+  vlib_process_signal_event (vm, dhcp6_client_cp_process_node.index,
+			     RD_CP_EVENT_INTERRUPT, 0);
+}
+
+static void
+disable_process (void)
+{
+  dhcp6_client_cp_main_t *rm = &dhcp6_client_cp_main;
+  vlib_main_t *vm = rm->vlib_main;
+
+  vlib_process_signal_event (vm, dhcp6_client_cp_process_node.index,
+			     RD_CP_EVENT_DISABLE, 0);
+}
+
+static void
+enable_process (void)
+{
+  dhcp6_client_cp_main_t *rm = &dhcp6_client_cp_main;
+  vlib_main_t *vm = rm->vlib_main;
+  vlib_node_t *node;
+
+  node = vec_elt (vm->node_main.nodes, rm->node_index);
+
+  vlib_node_set_state (vm, rm->node_index, VLIB_NODE_STATE_POLLING);
+  vlib_start_process (vm, node->runtime_index);
+}
+
+static clib_error_t *
+dhcp6_addresses_show_command_function (vlib_main_t * vm,
+				       unformat_input_t * input,
+				       vlib_cli_command_t * cmd)
+{
+  dhcp6_client_cp_main_t *dm = &dhcp6_client_cp_main;
+  clib_error_t *error = 0;
+  address_info_t *address_info;
+  f64 current_time = vlib_time_now (vm);
+
+  /* *INDENT-OFF* */
+  pool_foreach (address_info, dm->address_pool,
+  ({
+    vlib_cli_output (vm, "address: %U, "
+                     "preferred lifetime: %u, valid lifetime: %u "
+                     "(%f remaining)",
+                     format_ip6_address, &address_info->address,
+                     address_info->preferred_lt, address_info->valid_lt,
+                     address_info->due_time - current_time);
+  }));
+  /* *INDENT-ON* */
+
+  return error;
+}
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (dhcp6_addresses_show_command, static) = {
+  .path = "show dhcp6 addresses",
+  .short_help = "show dhcp6 addresses",
+  .function = dhcp6_addresses_show_command_function,
+};
+/* *INDENT-ON* */
+
+static clib_error_t *
+dhcp6_clients_show_command_function (vlib_main_t * vm,
+				     unformat_input_t * input,
+				     vlib_cli_command_t * cmd)
+{
+  dhcp6_client_cp_main_t *rm = &dhcp6_client_cp_main;
+  clib_error_t *error = 0;
+  client_state_t *cs;
+  f64 current_time = vlib_time_now (vm);
+  char buf1[256];
+  char buf2[256];
+  const char *rebinding;
+  u32 i;
+
+  for (i = 0; i < vec_len (rm->client_state_by_sw_if_index); i++)
+    {
+      cs = &rm->client_state_by_sw_if_index[i];
+      if (cs->enabled)
+	{
+	  if (cs->T1_due_time != DBL_MAX && cs->T1_due_time > current_time)
+	    {
+	      sprintf (buf1, "%u remaining",
+		       (u32) round (cs->T1_due_time - current_time));
+	    }
+	  else
+	    sprintf (buf1, "timeout");
+	  if (cs->T2_due_time != DBL_MAX && cs->T2_due_time > current_time)
+	    sprintf (buf2, "%u remaining",
+		     (u32) round (cs->T2_due_time - current_time));
+	  else
+	    sprintf (buf2, "timeout");
+	  if (cs->rebinding)
+	    rebinding = ", REBINDING";
+	  else
+	    rebinding = "";
+	  if (cs->T1)
+	    vlib_cli_output (vm,
+			     "sw_if_index: %u, T1: %u (%s), "
+			     "T2: %u (%s), server index: %d%s", i,
+			     cs->T1, buf1, cs->T2, buf2,
+			     cs->server_index, rebinding);
+	  else
+	    vlib_cli_output (vm, "sw_if_index: %u%s", i, rebinding);
+	}
+    }
+
+  return error;
+}
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (dhcp6_clients_show_command, static) = {
+  .path = "show dhcp6 clients",
+  .short_help = "show dhcp6 clients",
+  .function = dhcp6_clients_show_command_function,
+};
+/* *INDENT-ON* */
+
+static int
+dhcp6_client_enable_disable (u32 sw_if_index, u8 enable)
+{
+  dhcp6_client_cp_main_t *rm = &dhcp6_client_cp_main;
+  vnet_main_t *vnm = rm->vnet_main;
+  vlib_main_t *vm = rm->vlib_main;
+  client_state_t *client_state;
+  client_state_t empty_config = { 0 };
+  address_info_t *address_info;
+  clib_error_t *error;
+
+  if (!vnet_sw_interface_is_api_valid (vnm, sw_if_index))
+    {
+      clib_warning ("Invalid sw_if_index");
+      return 1;
+    }
+
+  vec_validate_init_empty (rm->client_state_by_sw_if_index, sw_if_index,
+			   empty_config);
+  client_state = &rm->client_state_by_sw_if_index[sw_if_index];
+
+  u8 old_enabled = client_state->enabled;
+  if (enable)
+    client_state->enabled = 1;
+  client_state->server_index = ~0;
+
+  if (!old_enabled && enable)
+    {
+      rm->n_clients++;
+      if (rm->n_clients == 1)
+	{
+	  enable_process ();
+	  dhcp6_clients_enable_disable (1);
+	}
+
+      ip6_enable (sw_if_index);
+      send_client_message_start_stop (sw_if_index, ~0, DHCPV6_MSG_SOLICIT,
+				      0, 1);
+    }
+  else if (old_enabled && !enable)
+    {
+      send_client_message_start_stop (sw_if_index, ~0, ~0, 0, 0);
+
+      rm->n_clients--;
+      if (rm->n_clients == 0)
+	{
+	  dhcp6_clients_enable_disable (0);
+	  disable_process ();
+	}
+
+      /* *INDENT-OFF* */
+      pool_foreach (address_info, rm->address_pool,
+      ({
+        if (address_info->sw_if_index == sw_if_index)
+          {
+            ASSERT (sw_if_index < vec_len (rm->client_state_by_sw_if_index) &&
+                    rm->client_state_by_sw_if_index[sw_if_index].enabled);
+            client_state_t *client_state =
+              &rm->client_state_by_sw_if_index[sw_if_index];
+            send_client_message_start_stop (sw_if_index,
+                                            client_state->server_index,
+                                            DHCPV6_MSG_RELEASE, address_info,
+                                            1);
+            error = ip6_add_del_interface_address (vm, sw_if_index,
+                                                   &address_info->address,
+                                                   64, 1);
+            if (error)
+                clib_warning ("Failed to delete interface address");
+            pool_put (rm->address_pool, address_info);
+          }
+      }));
+      /* *INDENT-ON* */
+    }
+
+  if (!enable)
+    client_state->enabled = 0;
+
+  return 0;
+}
+
+static clib_error_t *
+dhcp6_client_enable_disable_command_fn (vlib_main_t * vm,
+					unformat_input_t * input,
+					vlib_cli_command_t * cmd)
+{
+  dhcp6_client_cp_main_t *rm = &dhcp6_client_cp_main;
+  vnet_main_t *vnm = rm->vnet_main;
+  clib_error_t *error = 0;
+  u32 sw_if_index = ~0;
+  u8 enable = 1;
+
+  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+    {
+      if (unformat
+	  (input, "%U", unformat_vnet_sw_interface, vnm, &sw_if_index))
+	;
+      else if (unformat (input, "disable"))
+	enable = 0;
+      else
+	{
+	  error = clib_error_return (0, "unexpected input `%U'",
+				     format_unformat_error, input);
+	  goto done;
+	}
+    }
+
+  if (sw_if_index != ~0)
+    {
+      if (dhcp6_client_enable_disable (sw_if_index, enable) != 0)
+	error = clib_error_return (0, "Invalid sw_if_index");
+    }
+  else
+    error = clib_error_return (0, "Missing sw_if_index");
+
+done:
+  return error;
+}
+
+/*?
+ * This command is used to enable/disable DHCPv6 client
+ * on particular interface.
+ *
+ * @cliexpar
+ * @parblock
+ * Example of how to enable DHCPv6 client:
+ * @cliexcmd{dhcp6 client GigabitEthernet2/0/0}
+ * Example of how to disable DHCPv6 client:
+ * @cliexcmd{dhcp6 client GigabitEthernet2/0/0 disable}
+ * @endparblock
+?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (dhcp6_client_enable_disable_command, static) = {
+  .path = "dhcp6 client",
+  .short_help = "dhcp6 client <interface> [disable]",
+  .function = dhcp6_client_enable_disable_command_fn,
+};
+/* *INDENT-ON* */
+
+static void
+  vl_api_dhcp6_client_enable_disable_t_handler
+  (vl_api_dhcp6_client_enable_disable_t * mp)
+{
+  vl_api_dhcp6_client_enable_disable_reply_t *rmp;
+  u32 sw_if_index;
+  int rv = 0;
+
+  VALIDATE_SW_IF_INDEX (mp);
+
+  sw_if_index = ntohl (mp->sw_if_index);
+
+  rv = dhcp6_client_enable_disable (sw_if_index, mp->enable);
+
+  BAD_SW_IF_INDEX_LABEL;
+
+  REPLY_MACRO (VL_API_SW_INTERFACE_SET_TABLE_REPLY);
+}
+
+#define vl_msg_name_crc_list
+#include <vnet/dhcp/dhcp6_ia_na_client_cp.api.h>
+#undef vl_msg_name_crc_list
+
+static void
+setup_message_id_table (api_main_t * am)
+{
+#define _(id,n,crc) vl_msg_api_add_msg_name_crc (am, #n "_" #crc, id);
+  foreach_vl_msg_name_crc_dhcp6_ia_na_client_cp;
+#undef _
+}
+
+static clib_error_t *
+dhcp_client_cp_init (vlib_main_t * vm)
+{
+  dhcp6_client_cp_main_t *rm = &dhcp6_client_cp_main;
+  api_main_t *am = &api_main;
+
+  rm->vlib_main = vm;
+  rm->vnet_main = vnet_get_main ();
+  rm->api_main = am;
+  rm->node_index = dhcp6_client_cp_process_node.index;
+
+#define _(N,n)                                                  \
+    vl_msg_api_set_handlers(VL_API_##N, #n,                     \
+                           vl_api_##n##_t_handler,              \
+                           vl_noop_handler,                     \
+                           vl_api_##n##_t_endian,               \
+                           vl_api_##n##_t_print,                \
+                           sizeof(vl_api_##n##_t), 0/* do NOT trace! */);
+  foreach_dhcp6_client_cp_msg;
+#undef _
+
+  /*
+   * Set up the (msg_name, crc, message-id) table
+   */
+  setup_message_id_table (am);
+
+  return 0;
+}
+
+VLIB_INIT_FUNCTION (dhcp_client_cp_init);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/src/vnet/dhcp/dhcp6_ia_na_client_dp.c b/src/vnet/dhcp/dhcp6_ia_na_client_dp.c
new file mode 100644
index 00000000000..d5bd648502e
--- /dev/null
+++ b/src/vnet/dhcp/dhcp6_ia_na_client_dp.c
@@ -0,0 +1,656 @@
+/*
+ * Copyright (c) 2018 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 <vnet/dhcp/dhcp6_packet.h>
+#include <vnet/dhcp/dhcp_proxy.h>
+#include <vnet/mfib/mfib_table.h>
+#include <vnet/mfib/ip6_mfib.h>
+#include <vnet/fib/fib.h>
+#include <vnet/adj/adj_mcast.h>
+#include <vnet/ip/ip6_neighbor.h>
+#include <vlibapi/api_common.h>
+#include <vlibmemory/api.h>
+#include <vnet/dhcp/dhcp6_ia_na_client_dp.h>
+#include <vnet/dhcp/dhcp6_client_common_dp.h>
+
+#include <vnet/vnet_msg_enum.h>
+
+#define vl_typedefs		/* define message structures */
+#include <vnet/vnet_all_api_h.h>
+#undef vl_typedefs
+
+#define vl_endianfun		/* define message structures */
+#include <vnet/vnet_all_api_h.h>
+#undef vl_endianfun
+
+/* instantiate all the print functions we know about */
+#define vl_print(handle, ...) vlib_cli_output (handle, __VA_ARGS__)
+#define vl_printfun
+#include <vnet/vnet_all_api_h.h>
+#undef vl_printfun
+
+#include <vlibapi/api_helper_macros.h>
+
+dhcp6_ia_na_client_main_t dhcp6_ia_na_client_main;
+dhcp6_ia_na_client_public_main_t dhcp6_ia_na_client_public_main;
+
+static void
+signal_report (address_report_t * r)
+{
+  vlib_main_t *vm = vlib_get_main ();
+  dhcp6_ia_na_client_main_t *cm = &dhcp6_ia_na_client_main;
+  uword ni = cm->publisher_node;
+  uword et = cm->publisher_et;
+
+  if (ni == (uword) ~ 0)
+    return;
+  address_report_t *q =
+    vlib_process_signal_event_data (vm, ni, et, 1, sizeof *q);
+
+  *q = *r;
+}
+
+int
+dhcp6_publish_report (address_report_t * r)
+{
+  void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length);
+  vl_api_rpc_call_main_thread (signal_report, (u8 *) r, sizeof *r);
+  return 0;
+}
+
+void
+dhcp6_set_publisher_node (uword node_index, uword event_type)
+{
+  dhcp6_ia_na_client_main_t *cm = &dhcp6_ia_na_client_main;
+  cm->publisher_node = node_index;
+  cm->publisher_et = event_type;
+}
+
+static void
+stop_sending_client_message (vlib_main_t * vm,
+			     dhcp6_ia_na_client_state_t * client_state)
+{
+  u32 bi0;
+
+  client_state->keep_sending_client_message = 0;
+  vec_free (client_state->params.addresses);
+  if (client_state->buffer)
+    {
+      bi0 = vlib_get_buffer_index (vm, client_state->buffer);
+      vlib_buffer_free (vm, &bi0, 1);
+      client_state->buffer = 0;
+      adj_unlock (client_state->adj_index);
+      client_state->adj_index = ~0;
+    }
+}
+
+static vlib_buffer_t *
+create_buffer_for_client_message (vlib_main_t * vm, u32 sw_if_index,
+				  dhcp6_ia_na_client_state_t * client_state,
+				  u32 type)
+{
+  dhcp6_client_common_main_t *ccm = &dhcp6_client_common_main;
+  vnet_main_t *vnm = vnet_get_main ();
+
+  vlib_buffer_t *b;
+  u32 bi;
+  ip6_header_t *ip;
+  udp_header_t *udp;
+  dhcpv6_header_t *dhcp;
+  ip6_address_t src_addr;
+  u32 dhcp_opt_len = 0;
+  client_state->transaction_start = vlib_time_now (vm);
+  u32 n_addresses;
+  u32 i;
+
+  vnet_hw_interface_t *hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
+  vnet_sw_interface_t *sup_sw = vnet_get_sup_sw_interface (vnm, sw_if_index);
+  vnet_sw_interface_t *sw = vnet_get_sw_interface (vnm, sw_if_index);
+
+  /* Interface(s) down? */
+  if ((hw->flags & VNET_HW_INTERFACE_FLAG_LINK_UP) == 0)
+    return NULL;
+  if ((sup_sw->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) == 0)
+    return NULL;
+  if ((sw->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) == 0)
+    return NULL;
+
+  /* Get a link-local address */
+  src_addr = ip6_neighbor_get_link_local_address (sw_if_index);
+
+  if (src_addr.as_u8[0] != 0xfe)
+    {
+      clib_warning ("Could not find source address to send DHCPv6 packet");
+      return NULL;
+    }
+
+  if (vlib_buffer_alloc (vm, &bi, 1) != 1)
+    {
+      clib_warning ("Buffer allocation failed");
+      return NULL;
+    }
+
+  b = vlib_get_buffer (vm, bi);
+  vnet_buffer (b)->sw_if_index[VLIB_RX] = sw_if_index;
+  vnet_buffer (b)->sw_if_index[VLIB_TX] = sw_if_index;
+  client_state->adj_index = adj_mcast_add_or_lock (FIB_PROTOCOL_IP6,
+						   VNET_LINK_IP6,
+						   sw_if_index);
+  vnet_buffer (b)->ip.adj_index[VLIB_TX] = client_state->adj_index;
+  b->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
+
+  ip = (ip6_header_t *) vlib_buffer_get_current (b);
+  udp = (udp_header_t *) (ip + 1);
+  dhcp = (dhcpv6_header_t *) (udp + 1);
+
+  ip->src_address = src_addr;
+  ip->hop_limit = 255;
+  ip->ip_version_traffic_class_and_flow_label =
+    clib_host_to_net_u32 (0x6 << 28);
+  ip->payload_length = 0;
+  ip->protocol = IP_PROTOCOL_UDP;
+
+  udp->src_port = clib_host_to_net_u16 (DHCPV6_CLIENT_PORT);
+  udp->dst_port = clib_host_to_net_u16 (DHCPV6_SERVER_PORT);
+  udp->checksum = 0;
+  udp->length = 0;
+
+  dhcp->msg_type = type;
+  dhcp->xid[0] = (client_state->transaction_id & 0x00ff0000) >> 16;
+  dhcp->xid[1] = (client_state->transaction_id & 0x0000ff00) >> 8;
+  dhcp->xid[2] = (client_state->transaction_id & 0x000000ff) >> 0;
+
+  void *d = (void *) dhcp->data;
+  dhcpv6_option_t *duid;
+  dhcpv6_elapsed_t *elapsed;
+  dhcpv6_ia_header_t *ia_hdr;
+  dhcpv6_ia_opt_addr_t *opt_addr;
+  if (type == DHCPV6_MSG_SOLICIT || type == DHCPV6_MSG_REQUEST ||
+      type == DHCPV6_MSG_RENEW || type == DHCPV6_MSG_REBIND ||
+      type == DHCPV6_MSG_RELEASE)
+    {
+      duid = (dhcpv6_option_t *) d;
+      duid->option = clib_host_to_net_u16 (DHCPV6_OPTION_CLIENTID);
+      duid->length = clib_host_to_net_u16 (CLIENT_DUID_LENGTH);
+      clib_memcpy (duid + 1, client_duid.bin_string, CLIENT_DUID_LENGTH);
+      d += sizeof (*duid) + CLIENT_DUID_LENGTH;
+
+      if (client_state->params.server_index != ~0)
+	{
+	  server_id_t *se =
+	    &ccm->server_ids[client_state->params.server_index];
+
+	  duid = (dhcpv6_option_t *) d;
+	  duid->option = clib_host_to_net_u16 (DHCPV6_OPTION_SERVERID);
+	  duid->length = clib_host_to_net_u16 (se->len);
+	  clib_memcpy (duid + 1, se->data, se->len);
+	  d += sizeof (*duid) + se->len;
+	}
+
+      elapsed = (dhcpv6_elapsed_t *) d;
+      elapsed->opt.option = clib_host_to_net_u16 (DHCPV6_OPTION_ELAPSED_TIME);
+      elapsed->opt.length =
+	clib_host_to_net_u16 (sizeof (*elapsed) - sizeof (elapsed->opt));
+      elapsed->elapsed_10ms = 0;
+      client_state->elapsed_pos =
+	(char *) &elapsed->elapsed_10ms -
+	(char *) vlib_buffer_get_current (b);
+      d += sizeof (*elapsed);
+
+      ia_hdr = (dhcpv6_ia_header_t *) d;
+      ia_hdr->opt.option = clib_host_to_net_u16 (DHCPV6_OPTION_IA_NA);
+      ia_hdr->iaid = clib_host_to_net_u32 (DHCPV6_CLIENT_IAID);
+      ia_hdr->t1 = clib_host_to_net_u32 (client_state->params.T1);
+      ia_hdr->t2 = clib_host_to_net_u32 (client_state->params.T2);
+      d += sizeof (*ia_hdr);
+
+      n_addresses = vec_len (client_state->params.addresses);
+
+      ia_hdr->opt.length =
+	clib_host_to_net_u16 (sizeof (*ia_hdr) +
+			      n_addresses * sizeof (*opt_addr) -
+			      sizeof (ia_hdr->opt));
+
+      for (i = 0; i < n_addresses; i++)
+	{
+	  dhcp6_send_client_message_params_address_t *addr =
+	    &client_state->params.addresses[i];
+	  opt_addr = (dhcpv6_ia_opt_addr_t *) d;
+	  opt_addr->opt.option = clib_host_to_net_u16 (DHCPV6_OPTION_IAADDR);
+	  opt_addr->opt.length =
+	    clib_host_to_net_u16 (sizeof (*opt_addr) -
+				  sizeof (opt_addr->opt));
+	  opt_addr->addr = addr->address;
+	  opt_addr->valid = clib_host_to_net_u32 (addr->valid_lt);
+	  opt_addr->preferred = clib_host_to_net_u32 (addr->preferred_lt);
+	  d += sizeof (*opt_addr);
+	}
+    }
+  else
+    {
+      clib_warning ("State not implemented");
+    }
+
+  dhcp_opt_len = ((u8 *) d) - dhcp->data;
+  udp->length =
+    clib_host_to_net_u16 (sizeof (*udp) + sizeof (*dhcp) + dhcp_opt_len);
+  ip->payload_length = udp->length;
+  b->current_length =
+    sizeof (*ip) + sizeof (*udp) + sizeof (*dhcp) + dhcp_opt_len;
+
+  ip->dst_address = all_dhcp6_relay_agents_and_servers;
+
+  return b;
+}
+
+static inline u8
+check_send_client_message (vlib_main_t * vm,
+			   dhcp6_ia_na_client_state_t * client_state,
+			   f64 current_time, f64 * due_time)
+{
+  vlib_buffer_t *p0;
+  vlib_frame_t *f;
+  u32 *to_next;
+  u32 next_index;
+  vlib_buffer_t *c0;
+  ip6_header_t *ip;
+  udp_header_t *udp;
+  u32 ci0;
+  int bogus_length = 0;
+
+  dhcp6_send_client_message_params_t *params;
+
+  f64 now = vlib_time_now (vm);
+
+  if (!client_state->keep_sending_client_message)
+    return false;
+
+  params = &client_state->params;
+
+  if (client_state->due_time > current_time)
+    {
+      *due_time = client_state->due_time;
+      return true;
+    }
+
+  p0 = client_state->buffer;
+
+  next_index = ip6_rewrite_mcast_node.index;
+
+  c0 = vlib_buffer_copy (vm, p0);
+  ci0 = vlib_get_buffer_index (vm, c0);
+
+  ip = (ip6_header_t *) vlib_buffer_get_current (c0);
+  udp = (udp_header_t *) (ip + 1);
+
+  u16 *elapsed_field = (u16 *) ((void *) ip + client_state->elapsed_pos);
+  *elapsed_field =
+    clib_host_to_net_u16 ((u16)
+			  ((now - client_state->transaction_start) * 100));
+
+  udp->checksum = 0;
+  udp->checksum =
+    ip6_tcp_udp_icmp_compute_checksum (vm, 0, ip, &bogus_length);
+
+  f = vlib_get_frame_to_node (vm, next_index);
+  to_next = vlib_frame_vector_args (f);
+  to_next[0] = ci0;
+  f->n_vectors = 1;
+  vlib_put_frame_to_node (vm, next_index, f);
+
+  if (params->mrc != 0 && --client_state->n_left == 0)
+    stop_sending_client_message (vm, client_state);
+  else
+    {
+      client_state->sleep_interval =
+	(2 + random_f64_from_to (-0.1, 0.1)) * client_state->sleep_interval;
+      if (client_state->sleep_interval > params->mrt)
+	client_state->sleep_interval =
+	  (1 + random_f64_from_to (-0.1, 0.1)) * params->mrt;
+
+      client_state->due_time = current_time + client_state->sleep_interval;
+
+      if (params->mrd != 0
+	  && current_time > client_state->start_time + params->mrd)
+	stop_sending_client_message (vm, client_state);
+      else
+	*due_time = client_state->due_time;
+    }
+
+  return client_state->keep_sending_client_message;
+}
+
+static uword
+send_dhcp6_client_message_process (vlib_main_t * vm,
+				   vlib_node_runtime_t * rt,
+				   vlib_frame_t * f0)
+{
+  dhcp6_ia_na_client_main_t *cm = &dhcp6_ia_na_client_main;
+  dhcp6_ia_na_client_state_t *client_state;
+  uword *event_data = 0;
+  f64 sleep_time = 1e9;
+  f64 current_time;
+  f64 due_time;
+  f64 dt = 0;
+  int i;
+
+  while (true)
+    {
+      vlib_process_wait_for_event_or_clock (vm, sleep_time);
+      vlib_process_get_events (vm, &event_data);
+      vec_reset_length (event_data);
+
+      current_time = vlib_time_now (vm);
+      do
+	{
+	  due_time = current_time + 1e9;
+	  for (i = 0; i < vec_len (cm->client_state_by_sw_if_index); i++)
+	    {
+	      client_state = &cm->client_state_by_sw_if_index[i];
+	      if (!client_state->entry_valid)
+		continue;
+	      if (check_send_client_message
+		  (vm, client_state, current_time, &dt) && (dt < due_time))
+		due_time = dt;
+	    }
+	  current_time = vlib_time_now (vm);
+	}
+      while (due_time < current_time);
+
+      sleep_time = due_time - current_time;
+    }
+
+  return 0;
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (send_dhcp6_client_message_process_node, static) = {
+    .function = send_dhcp6_client_message_process,
+    .type = VLIB_NODE_TYPE_PROCESS,
+    .name = "send-dhcp6-client-message-process",
+};
+/* *INDENT-ON* */
+
+void
+dhcp6_send_client_message (vlib_main_t * vm, u32 sw_if_index, u8 stop,
+			   dhcp6_send_client_message_params_t * params)
+{
+  dhcp6_ia_na_client_main_t *cm = &dhcp6_ia_na_client_main;
+  dhcp6_ia_na_client_state_t *client_state = 0;
+  dhcp6_ia_na_client_state_t empty_state = { 0, };
+
+  ASSERT (~0 != sw_if_index);
+
+  vec_validate_init_empty (cm->client_state_by_sw_if_index, sw_if_index,
+			   empty_state);
+  client_state = &cm->client_state_by_sw_if_index[sw_if_index];
+  if (!client_state->entry_valid)
+    {
+      client_state->entry_valid = 1;
+      client_state->adj_index = ~0;
+    }
+
+  stop_sending_client_message (vm, client_state);
+
+  if (!stop)
+    {
+      client_state->keep_sending_client_message = 1;
+      vec_free (client_state->params.addresses);
+      client_state->params = *params;
+      client_state->params.addresses = vec_dup (params->addresses);
+      client_state->n_left = params->mrc;
+      client_state->start_time = vlib_time_now (vm);
+      client_state->sleep_interval =
+	(1 + random_f64_from_to (-0.1, 0.1)) * params->irt;
+      client_state->due_time = 0;	/* send first packet ASAP */
+      client_state->transaction_id = random_u32 (&cm->seed) & 0x00ffffff;
+      client_state->buffer =
+	create_buffer_for_client_message (vm, sw_if_index, client_state,
+					  params->msg_type);
+      if (!client_state->buffer)
+	client_state->keep_sending_client_message = 0;
+      else
+	vlib_process_signal_event (vm,
+				   send_dhcp6_client_message_process_node.index,
+				   1, 0);
+    }
+}
+
+void
+  vl_api_dhcp6_send_client_message_t_handler
+  (vl_api_dhcp6_send_client_message_t * mp)
+{
+  vl_api_dhcp6_send_client_message_reply_t *rmp;
+  dhcp6_send_client_message_params_t params;
+  vlib_main_t *vm = vlib_get_main ();
+  u32 n_addresses;
+  u32 i;
+  int rv = 0;
+
+  VALIDATE_SW_IF_INDEX (mp);
+
+  BAD_SW_IF_INDEX_LABEL;
+  REPLY_MACRO (VL_API_DHCP6_SEND_CLIENT_MESSAGE_REPLY);
+
+  if (rv != 0)
+    return;
+
+  params.sw_if_index = ntohl (mp->sw_if_index);
+  params.server_index = ntohl (mp->server_index);
+  params.irt = ntohl (mp->irt);
+  params.mrt = ntohl (mp->mrt);
+  params.mrc = ntohl (mp->mrc);
+  params.mrd = ntohl (mp->mrd);
+  params.msg_type = mp->msg_type;
+  params.T1 = ntohl (mp->T1);
+  params.T2 = ntohl (mp->T2);
+  n_addresses = ntohl (mp->n_addresses);
+  params.addresses = 0;
+  if (n_addresses > 0)
+    vec_validate (params.addresses, n_addresses - 1);
+  for (i = 0; i < n_addresses; i++)
+    {
+      vl_api_dhcp6_address_info_t *ai = &mp->addresses[i];
+      dhcp6_send_client_message_params_address_t *addr = &params.addresses[i];
+      addr->preferred_lt = ntohl (ai->preferred_time);
+      addr->valid_lt = ntohl (ai->valid_time);
+      memcpy (addr->address.as_u8, ai->address, 16);
+    }
+
+  dhcp6_send_client_message (vm, ntohl (mp->sw_if_index), mp->stop, &params);
+}
+
+clib_error_t *
+call_dhcp6_reply_event_callbacks (void *data,
+				  _vnet_dhcp6_reply_event_function_list_elt_t
+				  * elt)
+{
+  clib_error_t *error = 0;
+
+  while (elt)
+    {
+      error = elt->fp (data);
+      if (error)
+	return error;
+      elt = elt->next_dhcp6_reply_event_function;
+    }
+
+  return error;
+}
+
+static uword
+dhcp6_reply_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
+		     vlib_frame_t * f)
+{
+  /* These cross the longjmp  boundry (vlib_process_wait_for_event)
+   * and need to be volatile - to prevent them from being optimized into
+   * a register - which could change during suspension */
+
+  while (1)
+    {
+      vlib_process_wait_for_event (vm);
+      uword event_type = DHCP6_DP_REPLY_REPORT;
+      void *event_data = vlib_process_get_event_data (vm, &event_type);
+
+      int i;
+      if (event_type == DHCP6_DP_REPLY_REPORT)
+	{
+	  address_report_t *events = event_data;
+	  for (i = 0; i < vec_len (events); i++)
+	    {
+	      u32 event_size =
+		sizeof (vl_api_dhcp6_reply_event_t) +
+		vec_len (events[i].addresses) *
+		sizeof (vl_api_dhcp6_address_info_t);
+	      vl_api_dhcp6_reply_event_t *event = clib_mem_alloc (event_size);
+	      memset (event, 0, event_size);
+
+	      event->sw_if_index = htonl (events[i].body.sw_if_index);
+	      event->server_index = htonl (events[i].body.server_index);
+	      event->msg_type = events[i].body.msg_type;
+	      event->T1 = htonl (events[i].body.T1);
+	      event->T2 = htonl (events[i].body.T2);
+	      event->inner_status_code =
+		htons (events[i].body.inner_status_code);
+	      event->status_code = htons (events[i].body.status_code);
+	      event->preference = events[i].body.preference;
+
+	      event->n_addresses = htonl (vec_len (events[i].addresses));
+	      vl_api_dhcp6_address_info_t *address =
+		(typeof (address)) event->addresses;
+	      u32 j;
+	      for (j = 0; j < vec_len (events[i].addresses); j++)
+		{
+		  dhcp6_address_info_t *info = &events[i].addresses[j];
+		  memcpy (address->address, &info->address, 16);
+		  address->valid_time = htonl (info->valid_time);
+		  address->preferred_time = htonl (info->preferred_time);
+		  address++;
+		}
+
+	      dhcp6_ia_na_client_public_main_t *dcpm =
+		&dhcp6_ia_na_client_public_main;
+	      call_dhcp6_reply_event_callbacks (event, dcpm->functions);
+
+	      vpe_client_registration_t *reg;
+              /* *INDENT-OFF* */
+              pool_foreach(reg, vpe_api_main.dhcp6_reply_events_registrations,
+              ({
+                vl_api_registration_t *vl_reg;
+                vl_reg =
+                  vl_api_client_index_to_registration (reg->client_index);
+                if (vl_reg && vl_api_can_send_msg (vl_reg))
+                  {
+                    vl_api_dhcp6_reply_event_t *msg =
+                      vl_msg_api_alloc (event_size);
+                    clib_memcpy (msg, event, event_size);
+                    msg->_vl_msg_id = htons (VL_API_DHCP6_REPLY_EVENT);
+                    msg->client_index = reg->client_index;
+                    msg->pid = reg->client_pid;
+                    vl_api_send_msg (vl_reg, (u8 *) msg);
+                  }
+              }));
+              /* *INDENT-ON* */
+
+	      clib_mem_free (event);
+	    }
+	}
+      vlib_process_put_event_data (vm, event_data);
+    }
+
+  return 0;
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (dhcp6_reply_process_node) = {
+  .function = dhcp6_reply_process,
+  .type = VLIB_NODE_TYPE_PROCESS,
+  .name = "dhcp6-reply-publisher-process",
+};
+/* *INDENT-ON* */
+
+void
+  vl_api_want_dhcp6_reply_events_t_handler
+  (vl_api_want_dhcp6_reply_events_t * mp)
+{
+  vpe_api_main_t *am = &vpe_api_main;
+  vl_api_want_dhcp6_reply_events_reply_t *rmp;
+  int rv = 0;
+
+  uword *p =
+    hash_get (am->dhcp6_reply_events_registration_hash, mp->client_index);
+  vpe_client_registration_t *rp;
+  if (p)
+    {
+      if (mp->enable_disable)
+	{
+	  clib_warning ("pid %d: already enabled...", ntohl (mp->pid));
+	  rv = VNET_API_ERROR_INVALID_REGISTRATION;
+	  goto reply;
+	}
+      else
+	{
+	  rp = pool_elt_at_index (am->dhcp6_reply_events_registrations, p[0]);
+	  pool_put (am->dhcp6_reply_events_registrations, rp);
+	  hash_unset (am->dhcp6_reply_events_registration_hash,
+		      mp->client_index);
+	  if (pool_elts (am->dhcp6_reply_events_registrations) == 0)
+	    dhcp6_set_publisher_node (~0, DHCP6_DP_REPORT_MAX);
+	  goto reply;
+	}
+    }
+  if (mp->enable_disable == 0)
+    {
+      clib_warning ("pid %d: already disabled...", ntohl (mp->pid));
+      rv = VNET_API_ERROR_INVALID_REGISTRATION;
+      goto reply;
+    }
+  pool_get (am->dhcp6_reply_events_registrations, rp);
+  rp->client_index = mp->client_index;
+  rp->client_pid = ntohl (mp->pid);
+  hash_set (am->dhcp6_reply_events_registration_hash, rp->client_index,
+	    rp - am->dhcp6_reply_events_registrations);
+  dhcp6_set_publisher_node (dhcp6_reply_process_node.index,
+			    DHCP6_DP_REPLY_REPORT);
+
+reply:
+  REPLY_MACRO (VL_API_WANT_DHCP6_REPLY_EVENTS_REPLY);
+}
+
+static clib_error_t *
+dhcp6_client_init (vlib_main_t * vm)
+{
+  dhcp6_ia_na_client_main_t *cm = &dhcp6_ia_na_client_main;
+
+  cm->vlib_main = vm;
+  cm->vnet_main = vnet_get_main ();
+
+  cm->publisher_node = ~0;
+
+  cm->seed = 0xdeaccabe;
+
+  return 0;
+}
+
+VLIB_INIT_FUNCTION (dhcp6_client_init);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/src/vnet/dhcp/dhcp6_ia_na_client_dp.h b/src/vnet/dhcp/dhcp6_ia_na_client_dp.h
new file mode 100644
index 00000000000..a866479fbaf
--- /dev/null
+++ b/src/vnet/dhcp/dhcp6_ia_na_client_dp.h
@@ -0,0 +1,176 @@
+/*
+ * Copyright (c) 2018 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.
+ */
+
+#ifndef included_vnet_dhcp6_client_dp_h
+#define included_vnet_dhcp6_client_dp_h
+
+#include <vlib/vlib.h>
+#include <vnet/dhcp/dhcp6_client_common_dp.h>
+
+typedef struct
+{
+  u32 preferred_lt;
+  u32 valid_lt;
+  ip6_address_t address;
+} dhcp6_send_client_message_params_address_t;
+
+typedef struct
+{
+  u32 sw_if_index;
+  u32 server_index;
+  u32 irt;
+  u32 mrt;
+  u32 mrc;
+  u32 mrd;
+  u8 msg_type;
+  u32 T1;
+  u32 T2;
+  dhcp6_send_client_message_params_address_t *addresses;
+} dhcp6_send_client_message_params_t;
+
+typedef struct
+{
+  u8 entry_valid;
+  u8 keep_sending_client_message;	/* when true then next fields are valid */
+  dhcp6_send_client_message_params_t params;
+  f64 transaction_start;
+  f64 sleep_interval;
+  f64 due_time;
+  u32 n_left;
+  f64 start_time;
+  u32 transaction_id;
+  vlib_buffer_t *buffer;
+  u32 elapsed_pos;
+  u32 adj_index;
+} dhcp6_ia_na_client_state_t;
+
+typedef struct
+{
+  dhcp6_ia_na_client_state_t *client_state_by_sw_if_index;
+
+  uword publisher_node;
+  uword publisher_et;
+
+  u32 seed;
+
+  /* convenience */
+  vlib_main_t *vlib_main;
+  vnet_main_t *vnet_main;
+} dhcp6_ia_na_client_main_t;
+
+extern dhcp6_ia_na_client_main_t dhcp6_ia_na_client_main;
+
+typedef struct
+{
+  ip6_address_t address;
+  u32 valid_time;
+  u32 preferred_time;
+  u16 status_code;
+} dhcp6_address_info_t;
+
+typedef struct
+{
+  dhcp6_report_common_t body;
+  u32 n_addresses;
+  dhcp6_address_info_t *addresses;
+} address_report_t;
+
+#define vl_typedefs		/* define message structures */
+#include <vnet/vnet_all_api_h.h>
+#undef vl_typedefs
+
+void dhcp6_send_client_message (vlib_main_t * vm, u32 sw_if_index, u8 stop,
+				dhcp6_send_client_message_params_t * params);
+void dhcp6_set_publisher_node (uword node_index, uword event_type);
+int dhcp6_publish_report (address_report_t * r);
+
+
+void
+  vl_api_want_dhcp6_reply_events_t_handler
+  (vl_api_want_dhcp6_reply_events_t * mp);
+void
+  vl_api_dhcp6_send_client_message_t_handler
+  (vl_api_dhcp6_send_client_message_t * mp);
+void
+  vl_api_dhcp6_clients_enable_disable_t_handler
+  (vl_api_dhcp6_clients_enable_disable_t * mp);
+
+extern vlib_node_registration_t dhcp6_reply_process_node;
+
+enum
+{ DHCP6_DP_REPLY_REPORT, DHCP6_DP_REPORT_MAX };
+
+typedef struct _vnet_dhcp6_reply_function_list_elt
+{
+  struct _vnet_dhcp6_reply_function_list_elt *next_dhcp6_reply_event_function;
+  clib_error_t *(*fp) (vl_api_dhcp6_reply_event_t * mp);
+} _vnet_dhcp6_reply_event_function_list_elt_t;
+
+typedef struct
+{
+  _vnet_dhcp6_reply_event_function_list_elt_t *functions;
+} dhcp6_ia_na_client_public_main_t;
+
+extern dhcp6_ia_na_client_public_main_t dhcp6_ia_na_client_public_main;
+
+#define VNET_DHCP6_REPLY_EVENT_FUNCTION(f)                                \
+                                                                          \
+static void __vnet_dhcp6_reply_event_function_init_##f (void)             \
+    __attribute__((__constructor__)) ;                                    \
+                                                                          \
+static void __vnet_dhcp6_reply_event_function_init_##f (void)             \
+{                                                                         \
+ dhcp6_ia_na_client_public_main_t * nm = &dhcp6_ia_na_client_public_main; \
+ static _vnet_dhcp6_reply_event_function_list_elt_t init_function;        \
+ init_function.next_dhcp6_reply_event_function = nm->functions;           \
+ nm->functions = &init_function;                                          \
+ init_function.fp = (void *) &f;                                          \
+}                                                                         \
+                                                                          \
+static void __vnet_dhcp6_reply_event_function_deinit_##f (void)           \
+    __attribute__((__destructor__)) ;                                     \
+                                                                          \
+static void __vnet_dhcp6_reply_event_function_deinit_##f (void)           \
+{                                                                         \
+ dhcp6_ia_na_client_public_main_t * nm = &dhcp6_ia_na_client_public_main; \
+ _vnet_dhcp6_reply_event_function_list_elt_t *next;                       \
+ if (nm->functions->fp == (void *) &f)                                    \
+    {                                                                     \
+      nm->functions =                                                     \
+        nm->functions->next_dhcp6_reply_event_function;                   \
+      return;                                                             \
+    }                                                                     \
+  next = nm->functions;                                                   \
+  while (next->next_dhcp6_reply_event_function)                           \
+    {                                                                     \
+      if (next->next_dhcp6_reply_event_function->fp == (void *) &f)       \
+        {                                                                 \
+          next->next_dhcp6_reply_event_function =                         \
+            next->next_dhcp6_reply_event_function->next_dhcp6_reply_event_function; \
+          return;                                                         \
+        }                                                                 \
+      next = next->next_dhcp6_reply_event_function;                       \
+    }                                                                     \
+}
+
+#endif /* included_vnet_dhcp6_client_dp_h */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/src/vnet/dhcp/dhcp6_packet.h b/src/vnet/dhcp/dhcp6_packet.h
index 1926154db27..d5467952a64 100644
--- a/src/vnet/dhcp/dhcp6_packet.h
+++ b/src/vnet/dhcp/dhcp6_packet.h
@@ -232,6 +232,12 @@ typedef CLIB_PACKED (struct
 
 typedef CLIB_PACKED (struct
 		     {
+		     dhcpv6_option_t opt; ip6_address_t addr; u32 preferred;
+		     u32 valid;
+		     }) dhcpv6_ia_opt_addr_t;
+
+typedef CLIB_PACKED (struct
+		     {
 		     dhcpv6_option_t opt;
 		     u16 options[0];
 		     }) dhcpv6_oro_t;
diff --git a/src/vnet/dhcp/dhcp6_pd_client_cp.c b/src/vnet/dhcp/dhcp6_pd_client_cp.c
index a2a0618106c..33813789e70 100644
--- a/src/vnet/dhcp/dhcp6_pd_client_cp.c
+++ b/src/vnet/dhcp/dhcp6_pd_client_cp.c
@@ -45,7 +45,6 @@ typedef struct
 {
   u32 prefix_group_index;
   uword opaque_data;		// used by prefix publisher
-  u32 TODO;
   ip6_address_t prefix;
   u8 prefix_length;
   u32 preferred_lt;
@@ -365,7 +364,7 @@ dhcp6_pd_reply_event_handler (vl_api_dhcp6_pd_reply_event_t * mp)
   if (!client_state->rebinding && client_state->server_index != server_index)
     {
       clib_warning ("Reply message arrived with Server ID different "
-		    "from that in Request of Renew message");
+		    "from that in Request or Renew message");
       return 0;
     }
 
@@ -433,6 +432,8 @@ dhcp6_pd_reply_event_handler (vl_api_dhcp6_pd_reply_event_t * mp)
 	  prefix_info->preferred_lt = preferred_time;
 	  prefix_info->valid_lt = valid_time;
 	  prefix_info->due_time = current_time + valid_time;
+	  if (prefix_info->due_time > rm->max_valid_due_time)
+	    rm->max_valid_due_time = prefix_info->due_time;
 	  continue;
 	}
 
@@ -448,6 +449,8 @@ dhcp6_pd_reply_event_handler (vl_api_dhcp6_pd_reply_event_t * mp)
       prefix_info->preferred_lt = preferred_time;
       prefix_info->valid_lt = valid_time;
       prefix_info->due_time = current_time + valid_time;
+      if (prefix_info->due_time > rm->max_valid_due_time)
+	rm->max_valid_due_time = prefix_info->due_time;
       rm->client_state_by_sw_if_index[sw_if_index].prefix_count++;
 
       u32 prefix_index = prefix_info - pm->prefix_pool;
diff --git a/src/vnet/dhcp/dhcp6_pd_client_dp.c b/src/vnet/dhcp/dhcp6_pd_client_dp.c
index b2b8f88f8fa..93311210944 100644
--- a/src/vnet/dhcp/dhcp6_pd_client_dp.c
+++ b/src/vnet/dhcp/dhcp6_pd_client_dp.c
@@ -24,6 +24,7 @@
 #include <vlibapi/api_common.h>
 #include <vlibmemory/api.h>
 #include <vnet/dhcp/dhcp6_pd_client_dp.h>
+#include <vnet/dhcp/dhcp6_client_common_dp.h>
 
 #include <vnet/vnet_msg_enum.h>
 
@@ -43,86 +44,11 @@
 
 #include <vlibapi/api_helper_macros.h>
 
-typedef struct
-{
-  u8 entry_valid;
-  u8 keep_sending_client_message;	/* when true then next fields are valid */
-  dhcp6_pd_send_client_message_params_t params;
-  f64 transaction_start;
-  f64 sleep_interval;
-  f64 due_time;
-  u32 n_left;
-  f64 start_time;
-  u32 transaction_id;
-  vlib_buffer_t *buffer;
-  u32 elapsed_pos;
-  u32 adj_index;
-} dhcp6_pd_client_state_t;
-
-typedef struct
-{
-  u8 *data;
-  u16 len;
-} server_id_t;
-
-typedef struct
-{
-  dhcp6_pd_client_state_t *client_state_by_sw_if_index;
-  server_id_t *server_ids;
-
-  uword publisher_node;
-  uword publisher_et;
-
-  u32 seed;
-
-  /* convenience */
-  vlib_main_t *vlib_main;
-  vnet_main_t *vnet_main;
-} dhcp6_pd_client_main_t;
-
-static dhcp6_pd_client_main_t dhcp6_pd_client_main;
+dhcp6_pd_client_main_t dhcp6_pd_client_main;
 dhcp6_pd_client_public_main_t dhcp6_pd_client_public_main;
 
-typedef struct
-{
-  ip6_address_t prefix;
-  u8 prefix_length;
-  u32 valid_time;
-  u32 preferred_time;
-  u16 status_code;
-} prefix_info_t;
-
-typedef struct
-{
-  u32 sw_if_index;
-  u32 server_index;
-  u8 msg_type;
-  u32 T1;
-  u32 T2;
-  u16 inner_status_code;
-  u16 status_code;
-  u8 preference;
-  u32 n_prefixes;
-  prefix_info_t *prefixes;
-} report_t;
-
-typedef union
-{
-  CLIB_PACKED (struct
-	       {
-	       u16 duid_type;
-	       u16 hardware_type;
-	       u8 lla[6];
-	       });
-  char bin_string[10];
-} dhcpv6_duid_ll_string_t;
-
-static dhcpv6_duid_ll_string_t client_duid;
-#define CLIENT_DUID_LENGTH sizeof (client_duid)
-#define DHCPV6_CLIENT_IAID 1
-
 static void
-signal_report (report_t * r)
+signal_report (prefix_report_t * r)
 {
   vlib_main_t *vm = vlib_get_main ();
   dhcp6_pd_client_main_t *cm = &dhcp6_pd_client_main;
@@ -131,13 +57,14 @@ signal_report (report_t * r)
 
   if (ni == (uword) ~ 0)
     return;
-  report_t *q = vlib_process_signal_event_data (vm, ni, et, 1, sizeof *q);
+  prefix_report_t *q =
+    vlib_process_signal_event_data (vm, ni, et, 1, sizeof *q);
 
   *q = *r;
 }
 
-static int
-publish_report (report_t * r)
+int
+dhcp6_pd_publish_report (prefix_report_t * r)
 {
   void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length);
   vl_api_rpc_call_main_thread (signal_report, (u8 *) r, sizeof *r);
@@ -152,62 +79,6 @@ dhcp6_pd_set_publisher_node (uword node_index, uword event_type)
   cm->publisher_et = event_type;
 }
 
-#define foreach_dhcpv6_pd_client \
-  _(DROP, "error-drop")          \
-  _(LOOKUP, "ip6-lookup")
-
-typedef enum
-{
-#define _(sym,str) DHCPV6_PD_CLIENT_NEXT_##sym,
-  foreach_dhcpv6_pd_client
-#undef _
-    DHCPV6_PD_CLIENT_N_NEXT,
-} dhcpv6_pd_client_next_t;
-
-/**
- * per-packet trace data
- */
-typedef struct dhcpv6_pd_client_trace_t_
-{
-} dhcpv6_pd_client_trace_t;
-
-static u8 *
-format_dhcpv6_pd_client_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 *);
-  //dhcpv6_pd_client_trace_t *t = va_arg (*args, dhcpv6_pd_client_trace_t *);
-
-  s = format (s, "nothing");
-
-  return s;
-}
-
-static u32
-server_index_get_or_create (u8 * data, u16 len)
-{
-  dhcp6_pd_client_main_t *cm = &dhcp6_pd_client_main;
-  u32 i;
-  server_id_t *se;
-  server_id_t new_se;
-
-  for (i = 0; i < vec_len (cm->server_ids); i++)
-    {
-      se = &cm->server_ids[i];
-      if (se->len == len && 0 == memcmp (se->data, data, len))
-	return i;
-    }
-
-  new_se.len = len;
-  new_se.data = 0;
-  vec_validate (new_se.data, len - 1);
-  memcpy (new_se.data, data, len);
-
-  vec_add1 (cm->server_ids, new_se);
-
-  return vec_len (cm->server_ids) - 1;
-}
-
 static void
 stop_sending_client_message (vlib_main_t * vm,
 			     dhcp6_pd_client_state_t * client_state)
@@ -226,304 +97,13 @@ stop_sending_client_message (vlib_main_t * vm,
     }
 }
 
-static uword
-dhcpv6_pd_client_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
-			  vlib_frame_t * frame)
-{
-  dhcp6_pd_client_main_t *cm = &dhcp6_pd_client_main;
-
-  dhcpv6_pd_client_next_t next_index;
-  u32 n_left_from, *from, *to_next;
-  next_index = 0;
-  n_left_from = frame->n_vectors;
-  from = vlib_frame_vector_args (frame);
-
-  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)
-	{
-	  ip6_header_t *ip0;
-	  u32 options_length;
-	  dhcpv6_header_t *dhcpv60;
-	  dhcpv6_option_t *option;
-	  vlib_buffer_t *b0;
-	  report_t report;
-	  u32 next0 = DHCPV6_PD_CLIENT_NEXT_DROP;
-	  u32 bi0;
-	  u32 xid;
-	  u32 sw_if_index;
-	  u32 iaid;
-	  u8 client_id_present = 0;
-	  u8 discard = 0;
-
-	  dhcp6_pd_client_state_t *client_state = NULL;
-
-	  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);
-
-	  dhcpv60 = vlib_buffer_get_current (b0);
-	  ip0 = (void *) (b0->data + vnet_buffer (b0)->l3_hdr_offset);
-	  u32 dhcpv6_ip6_palyoad_offset =
-	    (u8 *) dhcpv60 - ((u8 *) ip0 + sizeof (*ip0));
-	  options_length =
-	    ntohs (ip0->payload_length) - dhcpv6_ip6_palyoad_offset -
-	    sizeof (*dhcpv60);
-
-	  memset (&report, 0, sizeof (report));
-
-	  sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
-	  if (sw_if_index >= vec_len (cm->client_state_by_sw_if_index))
-	    client_state = 0;
-	  else
-	    client_state = &cm->client_state_by_sw_if_index[sw_if_index];
-
-	  xid =
-	    (dhcpv60->xid[0] << 16) + (dhcpv60->xid[1] << 8) +
-	    dhcpv60->xid[2];
-	  if (!client_state || client_state->transaction_id != xid)
-	    {
-	      clib_warning
-		("Received DHCPv6 message with wrong Transaction ID");
-	      discard = 1;
-	    }
-
-	  report.sw_if_index = sw_if_index;
-	  report.msg_type = dhcpv60->msg_type;
-	  report.server_index = ~0;
-
-	  switch (dhcpv60->msg_type)
-	    {
-	    case DHCPV6_MSG_ADVERTISE:
-	    case DHCPV6_MSG_REPLY:
-	      option = (dhcpv6_option_t *) (dhcpv60 + 1);
-	      while (options_length > 0)
-		{
-		  if (options_length <
-		      ntohs (option->length) + sizeof (*option))
-		    {
-		      clib_warning
-			("remaining payload length < option length (%d < %d)",
-			 options_length,
-			 ntohs (option->length) + sizeof (*option));
-		      break;
-		    }
-		  u16 oo = ntohs (option->option);
-		  if (oo == DHCPV6_OPTION_IA_PD)
-		    {
-		      u8 discard_ia_pd = 0;
-		      dhcpv6_ia_header_t *ia_header = (void *) option;
-		      iaid = ntohl (ia_header->iaid);
-		      u32 T1 = ntohl (ia_header->t1);
-		      u32 T2 = ntohl (ia_header->t2);
-		      if (iaid != DHCPV6_CLIENT_IAID)
-			discard_ia_pd = 1;
-		      if (T1 != 0 && T2 != 0 && T1 > T2)
-			discard_ia_pd = 1;
-		      if (!discard_ia_pd)
-			{
-			  report.T1 = T1;
-			  report.T2 = T2;
-			}
-		      dhcpv6_option_t *inner_option =
-			(void *) ia_header->data;
-		      u16 inner_options_length =
-			ntohs (option->length) - (sizeof (*ia_header) -
-						  sizeof (dhcpv6_option_t));
-		      while (inner_options_length > 0)
-			{
-			  u16 inner_oo = ntohs (inner_option->option);
-			  if (discard_ia_pd)
-			    ;
-			  else if (inner_oo == DHCPV6_OPTION_IAPREFIX)
-			    {
-			      dhcpv6_ia_opt_pd_t *iaprefix =
-				(void *) inner_option;
-			      vec_validate (report.prefixes,
-					    report.n_prefixes);
-			      prefix_info_t *prefix_info =
-				&report.prefixes[report.n_prefixes];
-			      report.n_prefixes++;
-			      prefix_info->preferred_time =
-				ntohl (iaprefix->preferred);
-			      prefix_info->valid_time =
-				ntohl (iaprefix->valid);
-			      prefix_info->prefix_length = iaprefix->prefix;
-			      prefix_info->prefix = iaprefix->addr;
-			    }
-			  else if (inner_oo == DHCPV6_OPTION_STATUS_CODE)
-			    {
-			      dhcpv6_status_code_t *sc =
-				(void *) inner_option;
-			      report.inner_status_code =
-				ntohs (sc->status_code);
-			    }
-			  inner_options_length -=
-			    sizeof (*inner_option) +
-			    ntohs (inner_option->length);
-			  inner_option =
-			    (void *) ((u8 *) inner_option +
-				      sizeof (*inner_option) +
-				      ntohs (inner_option->length));
-			}
-		    }
-		  else if (oo == DHCPV6_OPTION_CLIENTID)
-		    {
-		      if (client_id_present)
-			{
-			  clib_warning
-			    ("Duplicate Client ID in received DHVPv6 message");
-			  discard = 1;
-			}
-		      else
-			{
-			  u16 len = ntohs (option->length);
-			  client_id_present = 1;
-			  if (len != CLIENT_DUID_LENGTH ||
-			      0 != memcmp (option->data,
-					   client_duid.bin_string,
-					   CLIENT_DUID_LENGTH))
-			    {
-			      clib_warning
-				("Unrecognized client DUID inside received DHVPv6 message");
-			      discard = 1;
-			    }
-			}
-		    }
-		  else if (oo == DHCPV6_OPTION_SERVERID)
-		    {
-		      if (report.server_index != ~0)
-			{
-			  clib_warning
-			    ("Duplicate Server ID in received DHVPv6 message");
-			  discard = 1;
-			}
-		      else
-			{
-			  u16 ol = ntohs (option->length);
-			  if (ol - 2 /* 2 byte DUID type code */  > 128)
-			    {
-			      clib_warning
-				("Server DUID (without type code) is longer than 128 octets");
-			      discard = 1;
-			    }
-			  else
-			    {
-			      report.server_index =
-				server_index_get_or_create (option->data, ol);
-			    }
-			}
-		    }
-		  else if (oo == DHCPV6_OPTION_PREFERENCE)
-		    {
-		      report.preference = option->data[0];
-		    }
-		  else if (oo == DHCPV6_OPTION_STATUS_CODE)
-		    {
-		      dhcpv6_status_code_t *sc = (void *) option;
-		      report.status_code = ntohs (sc->status_code);
-		    }
-		  options_length -= sizeof (*option) + ntohs (option->length);
-		  option =
-		    (void *) ((u8 *) option + sizeof (*option) +
-			      ntohs (option->length));
-		}
-
-	      if (!client_id_present)
-		{
-		  clib_warning
-		    ("Missing Client ID in received DHVPv6 message");
-		  discard = 1;
-		}
-	      if (report.server_index == ~0)
-		{
-		  clib_warning
-		    ("Missing Server ID in received DHVPv6 message");
-		  discard = 1;
-		}
-
-	      if (!discard)
-		publish_report (&report);
-	      else
-		vec_free (report.prefixes);
-
-	      break;
-	    default:
-	      break;
-	    }
-
-	  if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
-	    {
-	      dhcpv6_pd_client_trace_t *t =
-		vlib_add_trace (vm, node, b0, sizeof (*t));
-	    }
-
-	  /* verify speculative enqueue, maybe switch current next frame */
-	  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);
-    }
-
-  return frame->n_vectors;
-}
-
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (dhcpv6_pd_client_node, static) = {
-    .function = dhcpv6_pd_client_node_fn,
-    .name = "dhcpv6-pd-client",
-    .vector_size = sizeof (u32),
-
-    .n_errors = 0,
-
-    .n_next_nodes = DHCPV6_PD_CLIENT_N_NEXT,
-    .next_nodes = {
-  #define _(s,n) [DHCPV6_PD_CLIENT_NEXT_##s] = n,
-      foreach_dhcpv6_pd_client
-  #undef _
-    },
-
-    .format_trace = format_dhcpv6_pd_client_trace,
-};
-/* *INDENT-ON* */
-
-static_always_inline f64
-random_f64_from_to (f64 from, f64 to)
-{
-  static u32 seed = 0;
-  static u8 seed_set = 0;
-  if (!seed_set)
-    {
-      seed = random_default_seed ();
-      seed_set = 1;
-    }
-  return random_f64 (&seed) * (to - from) + from;
-}
-
-static const ip6_address_t all_dhcp6_relay_agents_and_servers = {
-  .as_u8 = {
-	    0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-	    0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x02}
-};
-
 static vlib_buffer_t *
 create_buffer_for_client_message (vlib_main_t * vm,
 				  u32 sw_if_index,
 				  dhcp6_pd_client_state_t
 				  * client_state, u32 type)
 {
-  dhcp6_pd_client_main_t *dm = &dhcp6_pd_client_main;
+  dhcp6_client_common_main_t *ccm = &dhcp6_client_common_main;
   vnet_main_t *vnm = vnet_get_main ();
 
   vlib_buffer_t *b;
@@ -612,7 +192,7 @@ create_buffer_for_client_message (vlib_main_t * vm,
       if (client_state->params.server_index != ~0)
 	{
 	  server_id_t *se =
-	    &dm->server_ids[client_state->params.server_index];
+	    &ccm->server_ids[client_state->params.server_index];
 
 	  duid = (dhcpv6_option_t *) d;
 	  duid->option = clib_host_to_net_u16 (DHCPV6_OPTION_SERVERID);
@@ -798,7 +378,7 @@ send_dhcp6_pd_client_message_process (vlib_main_t * vm,
 }
 
 /* *INDENT-OFF* */
-VLIB_REGISTER_NODE (send_dhcp6_pd_client_message_process_node) = {
+VLIB_REGISTER_NODE (send_dhcp6_pd_client_message_process_node, static) = {
     .function = send_dhcp6_pd_client_message_process,
     .type = VLIB_NODE_TYPE_PROCESS,
     .name = "send-dhcp6-pd-client-message-process",
@@ -934,7 +514,7 @@ dhcp6_pd_reply_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
       int i;
       if (event_type == DHCP6_PD_DP_REPLY_REPORT)
 	{
-	  report_t *events = event_data;
+	  prefix_report_t *events = event_data;
 	  for (i = 0; i < vec_len (events); i++)
 	    {
 	      u32 event_size =
@@ -945,14 +525,15 @@ dhcp6_pd_reply_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
 		clib_mem_alloc (event_size);
 	      memset (event, 0, event_size);
 
-	      event->sw_if_index = htonl (events[i].sw_if_index);
-	      event->server_index = htonl (events[i].server_index);
-	      event->msg_type = events[i].msg_type;
-	      event->T1 = htonl (events[i].T1);
-	      event->T2 = htonl (events[i].T2);
-	      event->inner_status_code = htons (events[i].inner_status_code);
-	      event->status_code = htons (events[i].status_code);
-	      event->preference = events[i].preference;
+	      event->sw_if_index = htonl (events[i].body.sw_if_index);
+	      event->server_index = htonl (events[i].body.server_index);
+	      event->msg_type = events[i].body.msg_type;
+	      event->T1 = htonl (events[i].body.T1);
+	      event->T2 = htonl (events[i].body.T2);
+	      event->inner_status_code =
+		htons (events[i].body.inner_status_code);
+	      event->status_code = htons (events[i].body.status_code);
+	      event->preference = events[i].body.preference;
 
 	      event->n_prefixes = htonl (vec_len (events[i].prefixes));
 	      vl_api_dhcp6_pd_prefix_info_t *prefix =
@@ -960,7 +541,7 @@ dhcp6_pd_reply_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
 	      u32 j;
 	      for (j = 0; j < vec_len (events[i].prefixes); j++)
 		{
-		  prefix_info_t *info = &events[i].prefixes[j];
+		  dhcp6_prefix_info_t *info = &events[i].prefixes[j];
 		  memcpy (prefix->prefix, &info->prefix, 16);
 		  prefix->prefix_length = info->prefix_length;
 		  prefix->valid_time = htonl (info->valid_time);
@@ -1002,7 +583,7 @@ dhcp6_pd_reply_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
 }
 
 /* *INDENT-OFF* */
-VLIB_REGISTER_NODE (dhcp6_pd_reply_process_node, ) = {
+VLIB_REGISTER_NODE (dhcp6_pd_reply_process_node) = {
   .function = dhcp6_pd_reply_process,
   .type = VLIB_NODE_TYPE_PROCESS,
   .name = "dhcp6-pd-reply-publisher-process",
@@ -1036,7 +617,7 @@ void
 	  hash_unset (am->dhcp6_pd_reply_events_registration_hash,
 		      mp->client_index);
 	  if (pool_elts (am->dhcp6_pd_reply_events_registrations) == 0)
-	    dhcp6_pd_set_publisher_node (~0, REPORT_MAX);
+	    dhcp6_pd_set_publisher_node (~0, DHCP6_PD_DP_REPORT_MAX);
 	  goto reply;
 	}
     }
@@ -1058,91 +639,6 @@ reply:
   REPLY_MACRO (VL_API_WANT_DHCP6_PD_REPLY_EVENTS_REPLY);
 }
 
-void
-vl_api_dhcp6_duid_ll_set_t_handler (vl_api_dhcp6_duid_ll_set_t * mp)
-{
-  vl_api_dhcp6_duid_ll_set_reply_t *rmp;
-  dhcpv6_duid_ll_string_t *duid;
-  int rv = 0;
-
-  duid = (dhcpv6_duid_ll_string_t *) mp->duid_ll;
-  if (duid->duid_type != htonl (DHCPV6_DUID_LL))
-    {
-      rv = VNET_API_ERROR_INVALID_VALUE;
-      goto reply;
-    }
-  clib_memcpy (&client_duid, &duid, sizeof (client_duid));
-
-reply:
-  REPLY_MACRO (VL_API_DHCP6_DUID_LL_SET_REPLY);
-}
-
-static void
-generate_client_duid (void)
-{
-  client_duid.duid_type = htons (DHCPV6_DUID_LL);
-  client_duid.hardware_type = htons (1);
-
-  vnet_main_t *vnm = vnet_get_main ();
-  vnet_interface_main_t *im = &vnm->interface_main;
-  vnet_hw_interface_t *hi;
-  ethernet_interface_t *eth_if = 0;
-
-  /* *INDENT-OFF* */
-  pool_foreach (hi, im->hw_interfaces,
-  ({
-    eth_if = ethernet_get_interface (&ethernet_main, hi->hw_if_index);
-    if (eth_if)
-      break;
-  }));
-  /* *INDENT-ON* */
-
-  if (eth_if)
-    clib_memcpy (client_duid.lla, eth_if->address, 6);
-  else
-    {
-      clib_warning ("Failed to find any Ethernet interface, "
-		    "setting DHCPv6 DUID link-layer address to random value");
-      u32 seed = random_default_seed ();
-      random_u32 (&seed);
-      client_duid.lla[0] = 0xc2;	/* locally administered unicast */
-      client_duid.lla[1] = 0x18;
-      client_duid.lla[2] = 0x44;
-      client_duid.lla[3] = random_u32 (&seed);
-      client_duid.lla[4] = random_u32 (&seed);
-      client_duid.lla[5] = random_u32 (&seed);
-    }
-}
-
-void
-dhcp6_clients_enable_disable (u8 enable)
-{
-  vlib_main_t *vm = vlib_get_main ();
-
-  if (enable)
-    {
-      if (client_duid.duid_type == 0)
-	generate_client_duid ();
-      udp_register_dst_port (vm, UDP_DST_PORT_dhcpv6_to_client,
-			     dhcpv6_pd_client_node.index, 0 /* is_ip6 */ );
-    }
-  else
-    udp_unregister_dst_port (vm, UDP_DST_PORT_dhcpv6_to_client,
-			     0 /* is_ip6 */ );
-}
-
-void
-  vl_api_dhcp6_clients_enable_disable_t_handler
-  (vl_api_dhcp6_clients_enable_disable_t * mp)
-{
-  vl_api_dhcp6_clients_enable_disable_reply_t *rmp;
-  int rv = 0;
-
-  dhcp6_clients_enable_disable (mp->enable);
-
-  REPLY_MACRO (VL_API_WANT_DHCP6_PD_REPLY_EVENTS_REPLY);
-}
-
 static clib_error_t *
 dhcp6_pd_client_init (vlib_main_t * vm)
 {
diff --git a/src/vnet/dhcp/dhcp6_pd_client_dp.h b/src/vnet/dhcp/dhcp6_pd_client_dp.h
index ef69f19ff4d..88c731c2e67 100644
--- a/src/vnet/dhcp/dhcp6_pd_client_dp.h
+++ b/src/vnet/dhcp/dhcp6_pd_client_dp.h
@@ -17,10 +17,7 @@
 #define included_vnet_dhcp6_pd_client_dp_h
 
 #include <vlib/vlib.h>
-
-#define vl_typedefs		/* define message structures */
-#include <vnet/vnet_all_api_h.h>
-#undef vl_typedefs
+#include <vnet/dhcp/dhcp6_client_common_dp.h>
 
 typedef struct
 {
@@ -44,11 +41,63 @@ typedef struct
   dhcp6_pd_send_client_message_params_prefix_t *prefixes;
 } dhcp6_pd_send_client_message_params_t;
 
+typedef struct
+{
+  u8 entry_valid;
+  u8 keep_sending_client_message;	/* when true then next fields are valid */
+  dhcp6_pd_send_client_message_params_t params;
+  f64 transaction_start;
+  f64 sleep_interval;
+  f64 due_time;
+  u32 n_left;
+  f64 start_time;
+  u32 transaction_id;
+  vlib_buffer_t *buffer;
+  u32 elapsed_pos;
+  u32 adj_index;
+} dhcp6_pd_client_state_t;
+
+typedef struct
+{
+  dhcp6_pd_client_state_t *client_state_by_sw_if_index;
+
+  uword publisher_node;
+  uword publisher_et;
+
+  u32 seed;
+
+  /* convenience */
+  vlib_main_t *vlib_main;
+  vnet_main_t *vnet_main;
+} dhcp6_pd_client_main_t;
+
+extern dhcp6_pd_client_main_t dhcp6_pd_client_main;
+
+typedef struct
+{
+  ip6_address_t prefix;
+  u8 prefix_length;
+  u32 valid_time;
+  u32 preferred_time;
+  u16 status_code;
+} dhcp6_prefix_info_t;
+
+typedef struct
+{
+  dhcp6_report_common_t body;
+  u32 n_prefixes;
+  dhcp6_prefix_info_t *prefixes;
+} prefix_report_t;
+
+#define vl_typedefs		/* define message structures */
+#include <vnet/vnet_all_api_h.h>
+#undef vl_typedefs
+
 void dhcp6_pd_send_client_message (vlib_main_t * vm, u32 sw_if_index, u8 stop,
 				   dhcp6_pd_send_client_message_params_t *
 				   params);
 void dhcp6_pd_set_publisher_node (uword node_index, uword event_type);
-void dhcp6_clients_enable_disable (u8 enable);
+int dhcp6_pd_publish_report (prefix_report_t * r);
 
 void
   vl_api_want_dhcp6_pd_reply_events_t_handler
@@ -59,12 +108,11 @@ void
 void
   vl_api_dhcp6_clients_enable_disable_t_handler
   (vl_api_dhcp6_clients_enable_disable_t * mp);
-void vl_api_dhcp6_duid_ll_set_t_handler (vl_api_dhcp6_duid_ll_set_t * mp);
 
 extern vlib_node_registration_t dhcp6_pd_reply_process_node;
 
 enum
-{ DHCP6_PD_DP_REPLY_REPORT, REPORT_MAX };
+{ DHCP6_PD_DP_REPLY_REPORT, DHCP6_PD_DP_REPORT_MAX };
 
 typedef struct _vnet_dhcp6_pd_reply_function_list_elt
 {
diff --git a/src/vnet/dhcp/dhcp_api.c b/src/vnet/dhcp/dhcp_api.c
index 4e2ed86deed..59ab6dcbba5 100644
--- a/src/vnet/dhcp/dhcp_api.c
+++ b/src/vnet/dhcp/dhcp_api.c
@@ -25,6 +25,8 @@
 #include <vnet/dhcp/dhcp_proxy.h>
 #include <vnet/dhcp/client.h>
 #include <vnet/dhcp/dhcp6_pd_client_dp.h>
+#include <vnet/dhcp/dhcp6_ia_na_client_dp.h>
+#include <vnet/dhcp/dhcp6_client_common_dp.h>
 #include <vnet/fib/fib_table.h>
 
 #include <vnet/vnet_msg_enum.h>
@@ -53,7 +55,9 @@ _(DHCP_CLIENT_CONFIG, dhcp_client_config)         \
 _(DHCP_CLIENT_DUMP, dhcp_client_dump)             \
 _(WANT_DHCP6_PD_REPLY_EVENTS, want_dhcp6_pd_reply_events)               \
 _(DHCP6_PD_SEND_CLIENT_MESSAGE, dhcp6_pd_send_client_message)           \
-_(DHCP6_CLIENTS_ENABLE_DISABLE, dhcp6_clients_enable_disable)           \
+_(WANT_DHCP6_REPLY_EVENTS, want_dhcp6_reply_events)               \
+_(DHCP6_SEND_CLIENT_MESSAGE, dhcp6_send_client_message)           \
+_(DHCP6_CLIENTS_ENABLE_DISABLE, dhcp6_clients_enable_disable)     \
 _(DHCP6_DUID_LL_SET, dhcp6_duid_ll_set)
 
 
@@ -390,6 +394,8 @@ dhcp_api_hookup (vlib_main_t * vm)
 
   dhcp6_pd_set_publisher_node (dhcp6_pd_reply_process_node.index,
 			       DHCP6_PD_DP_REPLY_REPORT);
+  dhcp6_set_publisher_node (dhcp6_reply_process_node.index,
+			    DHCP6_DP_REPLY_REPORT);
 
   return 0;
 }