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authorSteven <sluong@cisco.com>2018-10-24 21:15:45 -0700
committerDave Barach <dave@barachs.net>2018-12-02 08:47:46 -0500
commitb0598497afde60146fe8480331c9f96e7a79475a (patch)
treea3d9f454195cb9317fceb29efe62f5b62de89dea /gmod/Makefile.am
parente7f61d1db511b9b09c7771c5851eaaf95a2fc7fe (diff)
vppinfra: c11 safe string functions
Add memcmp_s, strcmp_s, strncmp_s, strcpy_s, strncpy_s, strcat_s, strncat_s, strtok_s, strnlen_s, and strstr_s C11 safe string API. For migrating extant unsafe API, add also the corresponding macro version of each safe API, clib_memcmp, clib_strcmp, etc. In general, the benefits of the safe string APIs are to provide null pointer checks, add additional argument to specify the string length of the passed string rather than relying on the null terminated character, and src/dest overlap checking for the the string copy operations. The macro version of the API takes the same number of arguments as the unsafe API to provide easy migration. However, it does not usually provide the full aformentioned benefits. In some cases, it is necessary to move to the safe API rather than using the macro in order to avoid some unpredictable problems such as accessing memory beyond what it is intended due to the lack of the passed string length. dbarach: add a "make test" vector, and a doxygen file header cookie. Change-Id: I5cd79b8928dcf76a79bf3f0b8cbc1a8f24942f4c Signed-off-by: Steven <sluong@cisco.com> Signed-off-by: Dave Barach <dave@barachs.net>
Diffstat (limited to 'gmod/Makefile.am')
0 files changed, 0 insertions, 0 deletions
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/*
 *------------------------------------------------------------------
 * dhcp_api.c - dhcp api
 *
 * Copyright (c) 2016 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/interface.h>
#include <vnet/api_errno.h>
#include <dhcp/dhcp_proxy.h>
#include <dhcp/client.h>
#include <dhcp/dhcp6_pd_client_dp.h>
#include <dhcp/dhcp6_ia_na_client_dp.h>
#include <dhcp/dhcp6_client_common_dp.h>
#include <vnet/fib/fib_table.h>
#include <vnet/ip/ip_types_api.h>

/* define message IDs */
#include <vnet/format_fns.h>
#include <dhcp/dhcp.api_enum.h>
#include <dhcp/dhcp.api_types.h>

/**
 * Base message ID fot the plugin
 */
static u32 dhcp_base_msg_id;
#define REPLY_MSG_ID_BASE dhcp_base_msg_id

#include <vlibapi/api_helper_macros.h>

#define  DHCP_PLUGIN_VERSION_MAJOR 1
#define  DHCP_PLUGIN_VERSION_MINOR 0

static void
vl_api_dhcp_plugin_get_version_t_handler (vl_api_dhcp_plugin_get_version_t *
					  mp)
{
  vl_api_dhcp_plugin_get_version_reply_t *rmp;
  int msg_size = sizeof (*rmp);
  vl_api_registration_t *reg;

  reg = vl_api_client_index_to_registration (mp->client_index);
  if (!reg)
    return;

  rmp = vl_msg_api_alloc (msg_size);
  clib_memset (rmp, 0, msg_size);
  rmp->_vl_msg_id =
    ntohs (VL_API_DHCP_PLUGIN_GET_VERSION_REPLY + REPLY_MSG_ID_BASE);
  rmp->context = mp->context;
  rmp->major = htonl (DHCP_PLUGIN_VERSION_MAJOR);
  rmp->minor = htonl (DHCP_PLUGIN_VERSION_MINOR);

  vl_api_send_msg (reg, (u8 *) rmp);
}

static void
vl_api_dhcp_plugin_control_ping_t_handler (vl_api_dhcp_plugin_control_ping_t *
					   mp)
{
  vl_api_dhcp_plugin_control_ping_reply_t *rmp;
  int rv = 0;

  /* *INDENT-OFF* */
  REPLY_MACRO2 (VL_API_DHCP_PLUGIN_CONTROL_PING_REPLY,
  ({
    rmp->vpe_pid = ntohl (getpid ());
  }));
  /* *INDENT-ON* */
}

static 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
vl_api_dhcp_proxy_set_vss_t_handler (vl_api_dhcp_proxy_set_vss_t * mp)
{
  vl_api_dhcp_proxy_set_vss_reply_t *rmp;
  u8 *vpn_ascii_id;
  int rv;

  mp->vpn_ascii_id[sizeof (mp->vpn_ascii_id) - 1] = 0;
  vpn_ascii_id = format (0, "%s", mp->vpn_ascii_id);
  rv =
    dhcp_proxy_set_vss ((mp->is_ipv6 ? FIB_PROTOCOL_IP6 : FIB_PROTOCOL_IP4),
			ntohl (mp->tbl_id), ntohl (mp->vss_type),
			vpn_ascii_id, ntohl (mp->oui), ntohl (mp->vpn_index),
			mp->is_add == 0);

  REPLY_MACRO (VL_API_DHCP_PROXY_SET_VSS_REPLY);
}


static void vl_api_dhcp_proxy_config_t_handler
  (vl_api_dhcp_proxy_config_t * mp)
{
  vl_api_dhcp_proxy_set_vss_reply_t *rmp;
  ip46_address_t src, server;
  int rv = -1;

  if (mp->dhcp_src_address.af != mp->dhcp_server.af)
    {
      rv = VNET_API_ERROR_INVALID_ARGUMENT;
      goto reply;
    }

  ip_address_decode (&mp->dhcp_src_address, &src);
  ip_address_decode (&mp->dhcp_server, &server);

  if (mp->dhcp_src_address.af == ADDRESS_IP4)
    {
      rv = dhcp4_proxy_set_server (&server,
				   &src,
				   (u32) ntohl (mp->rx_vrf_id),
				   (u32) ntohl (mp->server_vrf_id),
				   (int) (mp->is_add == 0));
    }
  else
    {
      rv = dhcp6_proxy_set_server (&server,
				   &src,
				   (u32) ntohl (mp->rx_vrf_id),
				   (u32) ntohl (mp->server_vrf_id),
				   (int) (mp->is_add == 0));
    }

reply:
  REPLY_MACRO (VL_API_DHCP_PROXY_CONFIG_REPLY);
}

static void
vl_api_dhcp_proxy_dump_t_handler (vl_api_dhcp_proxy_dump_t * mp)
{
  vl_api_registration_t *reg;

  reg = vl_api_client_index_to_registration (mp->client_index);
  if (!reg)
    return;;

  dhcp_proxy_dump ((mp->is_ip6 == 1 ?
		    FIB_PROTOCOL_IP6 : FIB_PROTOCOL_IP4), reg, mp->context);
}

void
dhcp_send_details (fib_protocol_t proto,
		   void *opaque, u32 context, dhcp_proxy_t * proxy)
{
  vl_api_dhcp_proxy_details_t *mp;
  vl_api_registration_t *reg = opaque;
  vl_api_dhcp_server_t *v_server;
  dhcp_server_t *server;
  fib_table_t *s_fib;
  dhcp_vss_t *vss;
  u32 count;
  size_t n;

  count = vec_len (proxy->dhcp_servers);
  n = sizeof (*mp) + (count * sizeof (vl_api_dhcp_server_t));
  mp = vl_msg_api_alloc (n);
  if (!mp)
    return;
  clib_memset (mp, 0, n);
  mp->_vl_msg_id = ntohs (VL_API_DHCP_PROXY_DETAILS + REPLY_MSG_ID_BASE);
  mp->context = context;
  mp->count = count;

  mp->is_ipv6 = (proto == FIB_PROTOCOL_IP6);
  mp->rx_vrf_id =
    htonl (dhcp_proxy_rx_table_get_table_id (proto, proxy->rx_fib_index));

  vss = dhcp_get_vss_info (&dhcp_proxy_main, proxy->rx_fib_index, proto);

  if (vss)
    {
      mp->vss_type = ntohl (vss->vss_type);
      if (vss->vss_type == VSS_TYPE_ASCII)
	{
	  u32 id_len = vec_len (vss->vpn_ascii_id);
	  clib_memcpy (mp->vss_vpn_ascii_id, vss->vpn_ascii_id, id_len);
	}
      else if (vss->vss_type == VSS_TYPE_VPN_ID)
	{
	  u32 oui = ((u32) vss->vpn_id[0] << 16) + ((u32) vss->vpn_id[1] << 8)
	    + ((u32) vss->vpn_id[2]);
	  u32 fib_id = ((u32) vss->vpn_id[3] << 24) +
	    ((u32) vss->vpn_id[4] << 16) + ((u32) vss->vpn_id[5] << 8) +
	    ((u32) vss->vpn_id[6]);
	  mp->vss_oui = htonl (oui);
	  mp->vss_fib_id = htonl (fib_id);
	}
    }
  else
    mp->vss_type = VSS_TYPE_INVALID;

  vec_foreach_index (count, proxy->dhcp_servers)
  {
    server = &proxy->dhcp_servers[count];
    v_server = &mp->servers[count];

    s_fib = fib_table_get (server->server_fib_index, proto);

    v_server->server_vrf_id = htonl (s_fib->ft_table_id);

    if (mp->is_ipv6)
      {
	memcpy (&v_server->dhcp_server.un, &server->dhcp_server.ip6, 16);
      }
    else
      {
	/* put the address in the first bytes */
	memcpy (&v_server->dhcp_server.un, &server->dhcp_server.ip4, 4);
      }
  }

  if (mp->is_ipv6)
    {
      memcpy (&mp->dhcp_src_address.un, &proxy->dhcp_src_address.ip6, 16);
    }
  else
    {
      /* put the address in the first bytes */
      memcpy (&mp->dhcp_src_address.un, &proxy->dhcp_src_address.ip4, 4);
    }
  vl_api_send_msg (reg, (u8 *) mp);
}

static void
dhcp_client_lease_encode (vl_api_dhcp_lease_t * lease,
			  const dhcp_client_t * client)
{
  size_t len;
  u8 i;

  lease->is_ipv6 = 0;		// only support IPv4 clients
  lease->sw_if_index = ntohl (client->sw_if_index);
  lease->state = ntohl (client->state);
  len = clib_min (sizeof (lease->hostname) - 1, vec_len (client->hostname));
  clib_memcpy (&lease->hostname, client->hostname, len);
  lease->hostname[len] = 0;

  lease->mask_width = client->installed.subnet_mask_width;
  clib_memcpy (&lease->host_address.un,
	       (u8 *) & client->installed.leased_address,
	       sizeof (ip4_address_t));
  clib_memcpy (&lease->router_address.un,
	       (u8 *) & client->installed.router_address,
	       sizeof (ip4_address_t));

  lease->count = vec_len (client->domain_server_address);
  for (i = 0; i < lease->count; i++)
    clib_memcpy (&lease->domain_server[i].address,
		 (u8 *) & client->domain_server_address[i],
		 sizeof (ip4_address_t));

  clib_memcpy (&lease->host_mac[0], client->client_hardware_address, 6);
}

static void
dhcp_client_data_encode (vl_api_dhcp_client_t * vclient,
			 const dhcp_client_t * client)
{
  size_t len;

  vclient->sw_if_index = ntohl (client->sw_if_index);
  len = clib_min (sizeof (vclient->hostname) - 1, vec_len (client->hostname));
  clib_memcpy (&vclient->hostname, client->hostname, len);
  vclient->hostname[len] = 0;

  len = clib_min (sizeof (vclient->id) - 1,
		  vec_len (client->client_identifier));
  clib_memcpy (&vclient->id, client->client_identifier, len);
  vclient->id[len] = 0;

  if (NULL != client->event_callback)
    vclient->want_dhcp_event = 1;
  else
    vclient->want_dhcp_event = 0;
  vclient->set_broadcast_flag = client->set_broadcast_flag;
  vclient->dscp = ip_dscp_encode (client->dscp);
  vclient->pid = client->pid;
}

static void
dhcp_compl_event_callback (u32 client_index, const dhcp_client_t * client)
{
  vl_api_registration_t *reg;
  vl_api_dhcp_compl_event_t *mp;

  reg = vl_api_client_index_to_registration (client_index);
  if (!reg)
    return;

  mp = vl_msg_api_alloc (sizeof (*mp));
  mp->client_index = client_index;
  mp->pid = client->pid;
  dhcp_client_lease_encode (&mp->lease, client);

  mp->_vl_msg_id = ntohs (VL_API_DHCP_COMPL_EVENT + REPLY_MSG_ID_BASE);

  vl_api_send_msg (reg, (u8 *) mp);
}

static void vl_api_dhcp_client_config_t_handler
  (vl_api_dhcp_client_config_t * mp)
{
  vlib_main_t *vm = vlib_get_main ();
  vl_api_dhcp_client_config_reply_t *rmp;
  u32 sw_if_index;
  ip_dscp_t dscp;
  int rv = 0;

  VALIDATE_SW_IF_INDEX (&(mp->client));

  sw_if_index = ntohl (mp->client.sw_if_index);
  dscp = ip_dscp_decode (mp->client.dscp);

  rv = dhcp_client_config (mp->is_add,
			   mp->client_index,
			   vm,
			   sw_if_index,
			   mp->client.hostname,
			   mp->client.id,
			   (mp->client.want_dhcp_event ?
			    dhcp_compl_event_callback :
			    NULL),
			   mp->client.set_broadcast_flag,
			   dscp, mp->client.pid);

  BAD_SW_IF_INDEX_LABEL;
  REPLY_MACRO (VL_API_DHCP_CLIENT_CONFIG_REPLY);
}

typedef struct dhcp_client_send_walk_ctx_t_
{
  vl_api_registration_t *reg;
  u32 context;
} dhcp_client_send_walk_ctx_t;

static int
send_dhcp_client_entry (const dhcp_client_t * client, void *arg)
{
  dhcp_client_send_walk_ctx_t *ctx;
  vl_api_dhcp_client_details_t *mp;
  u32 count;
  size_t n;

  ctx = arg;

  count = vec_len (client->domain_server_address);
  n = sizeof (*mp) + (count * sizeof (vl_api_domain_server_t));
  mp = vl_msg_api_alloc (n);
  if (!mp)
    return 0;
  clib_memset (mp, 0, n);

  mp->_vl_msg_id = ntohs (VL_API_DHCP_CLIENT_DETAILS + REPLY_MSG_ID_BASE);
  mp->context = ctx->context;

  dhcp_client_data_encode (&mp->client, client);
  dhcp_client_lease_encode (&mp->lease, client);

  vl_api_send_msg (ctx->reg, (u8 *) mp);

  return (1);
}

static void
vl_api_dhcp_client_dump_t_handler (vl_api_dhcp_client_dump_t * mp)
{
  vl_api_registration_t *reg;

  reg = vl_api_client_index_to_registration (mp->client_index);
  if (!reg)
    return;

  dhcp_client_send_walk_ctx_t ctx = {
    .reg = reg,
    .context = mp->context,
  };
  dhcp_client_walk (send_dhcp_client_entry, &ctx);
}

static 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);
}

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);
}

void
  vl_api_want_dhcp6_pd_reply_events_t_handler
  (vl_api_want_dhcp6_pd_reply_events_t * mp)
{
  vpe_api_main_t *am = &vpe_api_main;
  vl_api_want_dhcp6_pd_reply_events_reply_t *rmp;
  int rv = 0;

  uword *p =
    hash_get (am->dhcp6_pd_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_pd_reply_events_registrations, p[0]);
	  pool_put (am->dhcp6_pd_reply_events_registrations, rp);
	  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, DHCP6_PD_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_pd_reply_events_registrations, rp);
  rp->client_index = mp->client_index;
  rp->client_pid = ntohl (mp->pid);
  hash_set (am->dhcp6_pd_reply_events_registration_hash, rp->client_index,
	    rp - am->dhcp6_pd_reply_events_registrations);
  dhcp6_pd_set_publisher_node (dhcp6_pd_reply_process_node.index,
			       DHCP6_PD_DP_REPLY_REPORT);

reply:
  REPLY_MACRO (VL_API_WANT_DHCP6_PD_REPLY_EVENTS_REPLY);
}

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 = ntohl (mp->msg_type);
  params.T1 = ntohl (mp->T1);
  params.T2 = ntohl (mp->T2);
  n_addresses = ntohl (mp->n_addresses);
  /* Make sure that the number of addresses is sane */
  if (n_addresses * sizeof (params.addresses) > vl_msg_api_max_length (mp))
    {
      rv = VNET_API_ERROR_INVALID_VALUE;
      goto bad_sw_if_index;
    }
  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);
      ip6_address_decode (ai->address, &addr->address);
    }

  dhcp6_send_client_message (vm, ntohl (mp->sw_if_index), mp->stop, &params);
}

void
  vl_api_dhcp6_pd_send_client_message_t_handler
  (vl_api_dhcp6_pd_send_client_message_t * mp)
{
  vl_api_dhcp6_pd_send_client_message_reply_t *rmp;
  dhcp6_pd_send_client_message_params_t params;
  vlib_main_t *vm = vlib_get_main ();
  u32 n_prefixes;
  u32 i;
  int rv = 0;

  VALIDATE_SW_IF_INDEX (mp);

  BAD_SW_IF_INDEX_LABEL;
  REPLY_MACRO (VL_API_DHCP6_PD_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 = ntohl (mp->msg_type);
  params.T1 = ntohl (mp->T1);
  params.T2 = ntohl (mp->T2);
  n_prefixes = ntohl (mp->n_prefixes);

  /* Minimal check to see that the number of prefixes is sane */
  if (n_prefixes * sizeof (params.prefixes) > vl_msg_api_max_length (mp))
    {
      rv = VNET_API_ERROR_INVALID_VALUE;
      goto bad_sw_if_index;
    }

  params.prefixes = 0;
  if (n_prefixes > 0)
    vec_validate (params.prefixes, n_prefixes - 1);
  for (i = 0; i < n_prefixes; i++)
    {
      vl_api_dhcp6_pd_prefix_info_t *pi = &mp->prefixes[i];
      dhcp6_pd_send_client_message_params_prefix_t *pref =
	&params.prefixes[i];
      pref->preferred_lt = ntohl (pi->preferred_time);
      pref->valid_lt = ntohl (pi->valid_time);
      ip6_address_decode (pi->prefix.address, &pref->prefix);
      pref->prefix_length = pi->prefix.len;
    }

  dhcp6_pd_send_client_message (vm, ntohl (mp->sw_if_index), mp->stop,
				&params);
}

static 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  boundary (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);
	      clib_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];
		  ip6_address_encode (&info->address, address->address);
		  address->valid_time = htonl (info->valid_time);
		  address->preferred_time = htonl (info->preferred_time);
		  address++;
		}
	      vec_free (events[i].addresses);

	      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 + REPLY_MSG_ID_BASE);
                    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* */

static clib_error_t *
call_dhcp6_pd_reply_event_callbacks (void *data,
				     _vnet_dhcp6_pd_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_pd_reply_event_function;
    }

  return error;
}

static uword
dhcp6_pd_reply_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
			vlib_frame_t * f)
{
  /* These cross the longjmp  boundary (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_PD_DP_REPLY_REPORT;
      void *event_data = vlib_process_get_event_data (vm, &event_type);

      int i;
      if (event_type == DHCP6_PD_DP_REPLY_REPORT)
	{
	  prefix_report_t *events = event_data;
	  for (i = 0; i < vec_len (events); i++)
	    {
	      u32 event_size =
		sizeof (vl_api_dhcp6_pd_reply_event_t) +
		vec_len (events[i].prefixes) *
		sizeof (vl_api_dhcp6_pd_prefix_info_t);
	      vl_api_dhcp6_pd_reply_event_t *event =
		clib_mem_alloc (event_size);
	      clib_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_prefixes = htonl (vec_len (events[i].prefixes));
	      vl_api_dhcp6_pd_prefix_info_t *prefix =
		(typeof (prefix)) event->prefixes;
	      u32 j;
	      for (j = 0; j < vec_len (events[i].prefixes); j++)
		{
		  dhcp6_prefix_info_t *info = &events[i].prefixes[j];
		  ip6_address_encode (&info->prefix, prefix->prefix.address);
		  prefix->prefix.len = info->prefix_length;
		  prefix->valid_time = htonl (info->valid_time);
		  prefix->preferred_time = htonl (info->preferred_time);
		  prefix++;
		}
	      vec_free (events[i].prefixes);

	      dhcp6_pd_client_public_main_t *dpcpm =
		&dhcp6_pd_client_public_main;
	      call_dhcp6_pd_reply_event_callbacks (event, dpcpm->functions);

	      vpe_client_registration_t *reg;
              /* *INDENT-OFF* */
              pool_foreach (reg, vpe_api_main.dhcp6_pd_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_pd_reply_event_t *msg =
                      vl_msg_api_alloc (event_size);
                    clib_memcpy (msg, event, event_size);
                    msg->_vl_msg_id = htons (VL_API_DHCP6_PD_REPLY_EVENT + REPLY_MSG_ID_BASE);
                    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_pd_reply_process_node) = {
  .function = dhcp6_pd_reply_process,
  .type = VLIB_NODE_TYPE_PROCESS,
  .name = "dhcp6-pd-reply-publisher-process",
};
/* *INDENT-ON* */

/*
 * dhcp_api_hookup
 * Add vpe's API message handlers to the table.
 * vlib has already mapped shared memory and
 * added the client registration handlers.
 * See .../vlib-api/vlibmemory/memclnt_vlib.c:memclnt_process()
 */
#include <dhcp/dhcp.api.c>

static clib_error_t *
dhcp_api_hookup (vlib_main_t * vm)
{
  /*
   * Set up the (msg_name, crc, message-id) table
   */
  dhcp_base_msg_id = setup_message_id_table ();

  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;
}

VLIB_API_INIT_FUNCTION (dhcp_api_hookup);

#include <vlib/unix/plugin.h>
#include <vpp/app/version.h>

/* *INDENT-OFF* */
VLIB_PLUGIN_REGISTER () = {
    .version = VPP_BUILD_VER,
    .description = "Dynamic Host Configuration Protocol (DHCP)",
};
/* *INDENT-ON* */

/*
 * fd.io coding-style-patch-verification: ON
 *
 * Local Variables:
 * eval: (c-set-style "gnu")
 * End:
 */