/* packet-asap.c
 * Routines for Aggregate Server Access Protocol (ASAP)
 * It is hopefully (needs testing) compliant to
 * RFC 5352
 * RFC 5354
 * RFC 5356
 * https://tools.ietf.org/html/draft-dreibholz-rserpool-asap-hropt-27
 * https://tools.ietf.org/html/draft-dreibholz-rserpool-delay-26
 *
 * Copyright 2008-2021 Thomas Dreibholz <dreibh [AT] iem.uni-due.de>
 * Copyright 2004-2007 Michael Tüxen <tuexen [AT] fh-muenster.de>
 *
 * Wireshark - Network traffic analyzer
 * By Gerald Combs <gerald@wireshark.org>
 * Copyright 1998 Gerald Combs
 *
 * Copied from README.developer
 *
 * SPDX-License-Identifier: GPL-2.0-or-later
 */

#include "config.h"

#include <epan/packet.h>
#include <epan/to_str.h>
#include <epan/sctpppids.h>
#include <epan/stat_tap_ui.h>

#include <wsutil/str_util.h>
#include <wsutil/ws_roundup.h>

#include "packet-asap+enrp-common.h"

void proto_register_asap(void);
void proto_reg_handoff_asap(void);

static dissector_handle_t asap_handle;

/* Initialize the protocol and registered fields */
static int asap_tap = -1;
static int proto_asap = -1;
static int hf_cause_code = -1;
static int hf_cause_length = -1;
static int hf_cause_info = -1;
static int hf_cause_padding = -1;
static int hf_message_type = -1;
static int hf_message_flags = -1;
static int hf_message_length = -1;
static int hf_parameter_type = -1;
static int hf_parameter_length = -1;
static int hf_parameter_value = -1;
static int hf_parameter_padding = -1;
static int hf_parameter_ipv4_address = -1;
static int hf_parameter_ipv6_address = -1;
static int hf_dccp_port = -1;
static int hf_dccp_reserved = -1;
static int hf_dccp_service_code = -1;
static int hf_sctp_port = -1;
static int hf_transport_use = -1;
static int hf_tcp_port = -1;
static int hf_udp_port = -1;
static int hf_udp_reserved = -1;
static int hf_udp_lite_port = -1;
static int hf_udp_lite_reserved = -1;
static int hf_policy_type = -1;
static int hf_policy_value = -1;
static int hf_policy_weight = -1;
static int hf_policy_priority = -1;
static int hf_policy_load = -1;
static int hf_policy_degradation = -1;
static int hf_policy_loaddpf = -1;
static int hf_policy_weightdpf = -1;
static int hf_policy_distance = -1;
static int hf_pool_handle = -1;
static int hf_pe_pe_identifier = -1;
static int hf_home_enrp_id = -1;
static int hf_reg_life = -1;
static int hf_server_identifier = -1;
static int hf_cookie = -1;
static int hf_pe_identifier = -1;
static int hf_pe_checksum = -1;
static int hf_hropt_items = -1;
static int hf_home_enrp_server_bit = -1;
static int hf_reject_bit = -1;

/* Initialize the subtree pointers */
static gint ett_asap = -1;
static gint ett_asap_parameter = -1;
static gint ett_asap_cause = -1;
static gint ett_asap_flags = -1;

static guint64 asap_total_msgs = 0;
static guint64 asap_total_bytes = 0;

static void
dissect_parameters(tvbuff_t *, packet_info *, proto_tree *);
static void
dissect_parameter(tvbuff_t *, packet_info *, proto_tree *);
static int
dissect_asap(tvbuff_t *, packet_info *, proto_tree *, void *);

#define ASAP_UDP_PORT  3863
#define ASAP_TCP_PORT  3863
#define ASAP_SCTP_PORT 3863

typedef struct _asap_tap_rec_t {
  guint8      type;
  guint16     size;
  const char* type_string;
} asap_tap_rec_t;

/* Dissectors for error causes. This is common for ASAP and ENRP. */

static void
dissect_unknown_cause(tvbuff_t *cause_tvb, proto_tree *cause_tree, proto_item *cause_item)
{
  guint16 code, length, cause_info_length;

  code              = tvb_get_ntohs(cause_tvb, CAUSE_CODE_OFFSET);
  length            = tvb_get_ntohs(cause_tvb, CAUSE_LENGTH_OFFSET);
  cause_info_length = length - CAUSE_HEADER_LENGTH;
  if (cause_info_length > 0)
    proto_tree_add_item(cause_tree, hf_cause_info, cause_tvb, CAUSE_INFO_OFFSET, cause_info_length, ENC_NA);
  proto_item_append_text(cause_item, " (code %u and %u byte%s information)", code, cause_info_length, plurality(cause_info_length, "", "s"));
}

static void
// NOLINTNEXTLINE(misc-no-recursion)
dissect_error_cause(tvbuff_t *cause_tvb, packet_info *pinfo, proto_tree *parameter_tree)
{
  guint16 code, length, padding_length;
  proto_item *cause_item;
  proto_tree *cause_tree;
  tvbuff_t *parameter_tvb, *message_tvb;

  pinfo->flags.in_error_pkt = true;

  code           = tvb_get_ntohs(cause_tvb, CAUSE_CODE_OFFSET);
  length         = tvb_get_ntohs(cause_tvb, CAUSE_LENGTH_OFFSET);
  padding_length = tvb_reported_length(cause_tvb) - length;

  cause_tree = proto_tree_add_subtree(parameter_tree, cause_tvb, CAUSE_HEADER_OFFSET, -1, ett_asap_cause, &cause_item,
                                   val_to_str_const(code, cause_code_values, "Unknown error cause"));

  proto_tree_add_item(cause_tree, hf_cause_code,   cause_tvb, CAUSE_CODE_OFFSET,   CAUSE_CODE_LENGTH,   ENC_BIG_ENDIAN);
  proto_tree_add_item(cause_tree, hf_cause_length, cause_tvb, CAUSE_LENGTH_OFFSET, CAUSE_LENGTH_LENGTH, ENC_BIG_ENDIAN);

  switch(code) {
  case UNRECOGNIZED_PARAMETER_CAUSE_CODE:
    parameter_tvb = tvb_new_subset_remaining(cause_tvb, CAUSE_INFO_OFFSET);
    dissect_parameter(parameter_tvb, pinfo, cause_tree);
    break;
  case UNRECONGNIZED_MESSAGE_CAUSE_CODE:
    message_tvb = tvb_new_subset_remaining(cause_tvb, CAUSE_INFO_OFFSET);
    dissect_asap(message_tvb, pinfo, cause_tree, NULL);
    break;
  case INVALID_VALUES:
    parameter_tvb = tvb_new_subset_remaining(cause_tvb, CAUSE_INFO_OFFSET);
    dissect_parameter(parameter_tvb, pinfo, cause_tree);
    break;
  case NON_UNIQUE_PE_IDENTIFIER:
    break;
  case POOLING_POLICY_INCONSISTENT_CAUSE_CODE:
    parameter_tvb = tvb_new_subset_remaining(cause_tvb, CAUSE_INFO_OFFSET);
    dissect_parameter(parameter_tvb, pinfo, cause_tree);
    break;
  case LACK_OF_RESOURCES_CAUSE_CODE:
    break;
  case INCONSISTENT_TRANSPORT_TYPE_CAUSE_CODE:
    parameter_tvb = tvb_new_subset_remaining(cause_tvb, CAUSE_INFO_OFFSET);
    dissect_parameter(parameter_tvb, pinfo, cause_tree);
    break;
  case INCONSISTENT_DATA_CONTROL_CONFIGURATION_CAUSE_CODE:
    break;
  case UNKNOWN_POOL_HANDLE:
    break;
  case REJECTION_DUE_TO_SECURITY_CAUSE_CODE:
    break;
  default:
    dissect_unknown_cause(cause_tvb, cause_tree, cause_item);
    break;
  }
  if (padding_length > 0)
    proto_tree_add_item(cause_tree, hf_cause_padding, cause_tvb, CAUSE_HEADER_OFFSET + length, padding_length, ENC_NA);
}

static void
// NOLINTNEXTLINE(misc-no-recursion)
dissect_error_causes(tvbuff_t *error_causes_tvb, packet_info *pinfo, proto_tree *parameter_tree)
{
  guint16 length, total_length;
  gint offset;
  tvbuff_t *error_cause_tvb;

  offset = 0;
  while(tvb_reported_length_remaining(error_causes_tvb, offset) > 0) {
    length          = tvb_get_ntohs(error_causes_tvb, offset + CAUSE_LENGTH_OFFSET);
    total_length    = WS_ROUNDUP_4(length);
    error_cause_tvb = tvb_new_subset_length(error_causes_tvb, offset , total_length);
    dissect_error_cause(error_cause_tvb, pinfo, parameter_tree);
    offset += total_length;
  }
}

/* Dissectors for parameters. This is common for ASAP and ENRP. */

static void
dissect_ipv4_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
{
  proto_tree_add_item(parameter_tree, hf_parameter_ipv4_address, parameter_tvb, IPV4_ADDRESS_OFFSET, IPV4_ADDRESS_LENGTH, ENC_BIG_ENDIAN);
  proto_item_append_text(parameter_item, " (%s)", tvb_ip_to_str(wmem_packet_scope(), parameter_tvb, IPV4_ADDRESS_OFFSET));
}

static void
dissect_ipv6_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
{
  proto_tree_add_item(parameter_tree, hf_parameter_ipv6_address, parameter_tvb, IPV6_ADDRESS_OFFSET, IPV6_ADDRESS_LENGTH, ENC_NA);
  proto_item_append_text(parameter_item, " (%s)", tvb_ip6_to_str(wmem_packet_scope(), parameter_tvb, IPV6_ADDRESS_OFFSET));
}

static void
// NOLINTNEXTLINE(misc-no-recursion)
dissect_dccp_transport_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *parameter_tree)
{
  tvbuff_t *parameters_tvb;

  proto_tree_add_item(parameter_tree, hf_dccp_port,         parameter_tvb, DCCP_PORT_OFFSET,         DCCP_PORT_LENGTH,         ENC_BIG_ENDIAN);
  proto_tree_add_item(parameter_tree, hf_dccp_reserved,     parameter_tvb, DCCP_RESERVED_OFFSET,     DCCP_RESERVED_LENGTH,     ENC_BIG_ENDIAN);
  proto_tree_add_item(parameter_tree, hf_dccp_service_code, parameter_tvb, DCCP_SERVICE_CODE_OFFSET, DCCP_SERVICE_CODE_LENGTH, ENC_BIG_ENDIAN);

  parameters_tvb = tvb_new_subset_remaining(parameter_tvb, DCCP_ADDRESS_OFFSET);
  dissect_parameters(parameters_tvb, pinfo, parameter_tree);
}

static void
// NOLINTNEXTLINE(misc-no-recursion)
dissect_sctp_transport_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *parameter_tree)
{
  tvbuff_t *parameters_tvb;

  proto_tree_add_item(parameter_tree, hf_sctp_port,     parameter_tvb, SCTP_PORT_OFFSET,          SCTP_PORT_LENGTH,          ENC_BIG_ENDIAN);
  proto_tree_add_item(parameter_tree, hf_transport_use, parameter_tvb, SCTP_TRANSPORT_USE_OFFSET, SCTP_TRANSPORT_USE_LENGTH, ENC_BIG_ENDIAN);

  parameters_tvb = tvb_new_subset_remaining(parameter_tvb, SCTP_ADDRESS_OFFSET);
  dissect_parameters(parameters_tvb, pinfo, parameter_tree);
}

static void
// NOLINTNEXTLINE(misc-no-recursion)
dissect_tcp_transport_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *parameter_tree)
{
  tvbuff_t *parameters_tvb;

  proto_tree_add_item(parameter_tree, hf_tcp_port,      parameter_tvb, TCP_PORT_OFFSET,          TCP_PORT_LENGTH,          ENC_BIG_ENDIAN);
  proto_tree_add_item(parameter_tree, hf_transport_use, parameter_tvb, TCP_TRANSPORT_USE_OFFSET, TCP_TRANSPORT_USE_LENGTH, ENC_BIG_ENDIAN);

  parameters_tvb = tvb_new_subset_remaining(parameter_tvb, TCP_ADDRESS_OFFSET);
  dissect_parameters(parameters_tvb, pinfo, parameter_tree);
}

static void
// NOLINTNEXTLINE(misc-no-recursion)
dissect_udp_transport_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *parameter_tree)
{
  tvbuff_t *parameters_tvb;

  proto_tree_add_item(parameter_tree, hf_udp_port,     parameter_tvb, UDP_PORT_OFFSET,     UDP_PORT_LENGTH,     ENC_BIG_ENDIAN);
  proto_tree_add_item(parameter_tree, hf_udp_reserved, parameter_tvb, UDP_RESERVED_OFFSET, UDP_RESERVED_LENGTH, ENC_BIG_ENDIAN);

  parameters_tvb = tvb_new_subset_remaining(parameter_tvb, UDP_ADDRESS_OFFSET);
  dissect_parameters(parameters_tvb, pinfo, parameter_tree);
}

static void
// NOLINTNEXTLINE(misc-no-recursion)
dissect_udp_lite_transport_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *parameter_tree)
{
  tvbuff_t *parameters_tvb;

  proto_tree_add_item(parameter_tree, hf_udp_lite_port,     parameter_tvb, UDP_LITE_PORT_OFFSET,     UDP_LITE_PORT_LENGTH,     ENC_BIG_ENDIAN);
  proto_tree_add_item(parameter_tree, hf_udp_lite_reserved, parameter_tvb, UDP_LITE_RESERVED_OFFSET, UDP_LITE_RESERVED_LENGTH, ENC_BIG_ENDIAN);

  parameters_tvb = tvb_new_subset_remaining(parameter_tvb, UDP_LITE_ADDRESS_OFFSET);
  dissect_parameters(parameters_tvb, pinfo, parameter_tree);
}

static void
dissect_pool_member_selection_policy_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree)
{
  guint32 type;
  guint   length;

  proto_tree_add_item(parameter_tree, hf_policy_type,  parameter_tvb, POLICY_TYPE_OFFSET,  POLICY_TYPE_LENGTH,  ENC_BIG_ENDIAN);
  type = tvb_get_ntohl(parameter_tvb, POLICY_TYPE_OFFSET);
  switch (type) {
  case RANDOM_POLICY:
  case ROUND_ROBIN_POLICY:
    break;
  case WEIGHTED_RANDOM_POLICY:
  case WEIGHTED_ROUND_ROBIN_POLICY:
    proto_tree_add_item(parameter_tree, hf_policy_weight, parameter_tvb, POLICY_WEIGHT_OFFSET, POLICY_WEIGHT_LENGTH, ENC_BIG_ENDIAN);
    break;
  case PRIORITY_POLICY:
    proto_tree_add_item(parameter_tree, hf_policy_priority, parameter_tvb, POLICY_PRIORITY_OFFSET, POLICY_PRIORITY_LENGTH, ENC_BIG_ENDIAN);
    break;
  case LEAST_USED_POLICY:
  case RANDOMIZED_LEAST_USED_POLICY:
    proto_tree_add_double_format_value(parameter_tree, hf_policy_load, parameter_tvb, POLICY_LOAD_OFFSET, POLICY_LOAD_LENGTH,
                                       100.0 * tvb_get_ntohl(parameter_tvb, POLICY_LOAD_OFFSET) / (double)0xffffffff, "%1.2f%%",
                                       100.0 * tvb_get_ntohl(parameter_tvb, POLICY_LOAD_OFFSET) / (double)0xffffffff);
    break;
  case LEAST_USED_WITH_DEG_POLICY:
  case PRIORITY_LEAST_USED_POLICY:
    proto_tree_add_double_format_value(parameter_tree, hf_policy_load, parameter_tvb, POLICY_LOAD_OFFSET, POLICY_LOAD_LENGTH,
                                       100.0 * tvb_get_ntohl(parameter_tvb, POLICY_LOAD_OFFSET) / (double)0xffffffff, "%1.2f%%",
                                       100.0 * tvb_get_ntohl(parameter_tvb, POLICY_LOAD_OFFSET) / (double)0xffffffff);
    proto_tree_add_double_format_value(parameter_tree, hf_policy_degradation, parameter_tvb, POLICY_DEGRADATION_OFFSET, POLICY_DEGRADATION_LENGTH,
                                       100.0 * tvb_get_ntohl(parameter_tvb, POLICY_DEGRADATION_OFFSET) / (double)0xffffffff, "%1.2f%%",
                                       100.0 * tvb_get_ntohl(parameter_tvb, POLICY_DEGRADATION_OFFSET) / (double)0xffffffff);
    break;
  case LEAST_USED_DPF_POLICY:
    proto_tree_add_double_format_value(parameter_tree, hf_policy_load, parameter_tvb, POLICY_LOAD_OFFSET, POLICY_LOAD_LENGTH,
                                      100.0 * tvb_get_ntohl(parameter_tvb, POLICY_LOAD_OFFSET) / (double)0xffffffff, "%1.2f%%",
                                      100.0 * tvb_get_ntohl(parameter_tvb, POLICY_LOAD_OFFSET) / (double)0xffffffff);
    proto_tree_add_double_format_value(parameter_tree, hf_policy_loaddpf, parameter_tvb, POLICY_LUDPF_LOADDPF_OFFSET, POLICY_LUDPF_LOADDPF_LENGTH,
                                      tvb_get_ntohl(parameter_tvb, POLICY_LUDPF_LOADDPF_OFFSET) / (double)0xffffffff, "%1.5f",
                                      tvb_get_ntohl(parameter_tvb, POLICY_LUDPF_LOADDPF_OFFSET) / (double)0xffffffff);
    proto_tree_add_item(parameter_tree, hf_policy_distance, parameter_tvb, POLICY_LUDPF_DISTANCE_OFFSET, POLICY_LUDPF_DISTANCE_LENGTH, ENC_BIG_ENDIAN);
    break;
  case WEIGHTED_RANDOM_DPF_POLICY:
    proto_tree_add_item(parameter_tree, hf_policy_weight, parameter_tvb, POLICY_WEIGHT_OFFSET, POLICY_WEIGHT_LENGTH, ENC_BIG_ENDIAN);
    proto_tree_add_double_format_value(parameter_tree, hf_policy_weightdpf, parameter_tvb, POLICY_WRANDDPF_WEIGHTDPF_OFFSET, POLICY_WRANDDPF_WEIGHTDPF_LENGTH,
                                       tvb_get_ntohl(parameter_tvb, POLICY_WRANDDPF_WEIGHTDPF_OFFSET) / (double)0xffffffff, "%1.5f",
                                       tvb_get_ntohl(parameter_tvb, POLICY_WRANDDPF_WEIGHTDPF_OFFSET) / (double)0xffffffff);
    proto_tree_add_item(parameter_tree, hf_policy_distance, parameter_tvb, POLICY_WRANDDPF_DISTANCE_OFFSET, POLICY_WRANDDPF_DISTANCE_LENGTH, ENC_BIG_ENDIAN);
    break;
  default:
    length = tvb_reported_length(parameter_tvb) - POLICY_VALUE_OFFSET;
    if (length > 0) {
      proto_tree_add_item(parameter_tree, hf_policy_value, parameter_tvb, POLICY_VALUE_OFFSET, length, ENC_NA);
    }
    break;
  }
}

static void
dissect_pool_handle_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree)
{
  guint16 handle_length;
  proto_item*    pi;

  handle_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
  pi = proto_tree_add_item(parameter_tree, hf_pool_handle, parameter_tvb, POOL_HANDLE_OFFSET, handle_length, ENC_NA);

  proto_item_append_text(pi, " (%s)",
                         tvb_format_text(wmem_packet_scope(), parameter_tvb, POOL_HANDLE_OFFSET, handle_length));
}

static void
// NOLINTNEXTLINE(misc-no-recursion)
dissect_pool_element_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *parameter_tree)
{
  tvbuff_t*   parameters_tvb;

  proto_tree_add_item(parameter_tree, hf_pe_pe_identifier, parameter_tvb, PE_PE_IDENTIFIER_OFFSET,      PE_PE_IDENTIFIER_LENGTH,      ENC_BIG_ENDIAN);
  proto_tree_add_item(parameter_tree, hf_home_enrp_id,     parameter_tvb, HOME_ENRP_INDENTIFIER_OFFSET, HOME_ENRP_INDENTIFIER_LENGTH, ENC_BIG_ENDIAN);
  proto_tree_add_item(parameter_tree, hf_reg_life,    parameter_tvb, REGISTRATION_LIFE_OFFSET,     REGISTRATION_LIFE_LENGTH,     ENC_BIG_ENDIAN);

  parameters_tvb = tvb_new_subset_remaining(parameter_tvb, USER_TRANSPORT_PARAMETER_OFFSET);
  dissect_parameters(parameters_tvb, pinfo, parameter_tree);
}

static void
// NOLINTNEXTLINE(misc-no-recursion)
dissect_server_information_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *parameter_tree)
{
  tvbuff_t *parameters_tvb;

  proto_tree_add_item(parameter_tree, hf_server_identifier, parameter_tvb, SERVER_ID_OFFSET, SERVER_ID_LENGTH, ENC_BIG_ENDIAN);

  parameters_tvb = tvb_new_subset_remaining(parameter_tvb, SERVER_TRANSPORT_OFFSET);
  dissect_parameters(parameters_tvb, pinfo, parameter_tree);
}

static void
// NOLINTNEXTLINE(misc-no-recursion)
dissect_operation_error_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *parameter_tree)
{
  tvbuff_t *error_causes_tvb;

  error_causes_tvb = tvb_new_subset_remaining(parameter_tvb, ERROR_CAUSES_OFFSET);
  dissect_error_causes(error_causes_tvb, pinfo, parameter_tree);
}

static void
dissect_cookie_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
{
  guint16 cookie_length;

  cookie_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
  if (cookie_length > 0)
    proto_tree_add_item(parameter_tree, hf_cookie, parameter_tvb, COOKIE_OFFSET, cookie_length, ENC_NA);
  proto_item_append_text(parameter_item, " (%u byte%s)", cookie_length, plurality(cookie_length, "", "s"));
}

static void
dissect_pe_identifier_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
{
  proto_tree_add_item(parameter_tree, hf_pe_identifier, parameter_tvb, PE_IDENTIFIER_OFFSET, PE_IDENTIFIER_LENGTH, ENC_BIG_ENDIAN);
  proto_item_append_text(parameter_item, " (0x%x)", tvb_get_ntohl(parameter_tvb, PE_IDENTIFIER_OFFSET));
}

static void
dissect_pe_checksum_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
{
  proto_tree_add_checksum(parameter_tree, parameter_tvb, PE_CHECKSUM_OFFSET, hf_pe_checksum, -1, NULL, NULL, 0, ENC_BIG_ENDIAN, PROTO_CHECKSUM_NO_FLAGS);
  proto_item_append_text(parameter_item, " (0x%x)", tvb_get_ntohs(parameter_tvb, PE_CHECKSUM_OFFSET));
}

static void
dissect_handle_resolution_option_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree)
{
  proto_tree_add_item(parameter_tree, hf_hropt_items, parameter_tvb, HROPT_ITEMS_OFFSET, HROPT_ITEMS_LENGTH, ENC_BIG_ENDIAN);
}

static void
dissect_unknown_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
{
  guint16 type, parameter_value_length;

  type                   = tvb_get_ntohs(parameter_tvb, PARAMETER_TYPE_OFFSET);
  parameter_value_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;

  if (parameter_value_length > 0)
    proto_tree_add_item(parameter_tree, hf_parameter_value, parameter_tvb, PARAMETER_VALUE_OFFSET, parameter_value_length, ENC_NA);

  proto_item_append_text(parameter_item, " (type %u and %u byte%s value)", type, parameter_value_length, plurality(parameter_value_length, "", "s"));
}

static void
// NOLINTNEXTLINE(misc-no-recursion)
dissect_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *asap_tree)
{
  guint16 type, length, padding_length;
  proto_item *parameter_item;
  proto_tree *parameter_tree;

  /* extract tag and length from the parameter */
  type           = tvb_get_ntohs(parameter_tvb, PARAMETER_TYPE_OFFSET);
  length         = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
  padding_length = tvb_reported_length(parameter_tvb) - length;

  /* create proto_tree stuff */
  parameter_tree = proto_tree_add_subtree(asap_tree, parameter_tvb, PARAMETER_HEADER_OFFSET, -1,
      ett_asap_parameter, &parameter_item, val_to_str_const(type, parameter_type_values, "Unknown Parameter"));

  /* add tag and length to the asap tree */
  proto_tree_add_item(parameter_tree, hf_parameter_type,   parameter_tvb, PARAMETER_TYPE_OFFSET,   PARAMETER_TYPE_LENGTH,   ENC_BIG_ENDIAN);
  proto_tree_add_item(parameter_tree, hf_parameter_length, parameter_tvb, PARAMETER_LENGTH_OFFSET, PARAMETER_LENGTH_LENGTH, ENC_BIG_ENDIAN);

  increment_dissection_depth(pinfo);
  switch(type) {
  case IPV4_ADDRESS_PARAMETER_TYPE:
    dissect_ipv4_parameter(parameter_tvb, parameter_tree, parameter_item);
    break;
  case IPV6_ADDRESS_PARAMETER_TYPE:
    dissect_ipv6_parameter(parameter_tvb, parameter_tree, parameter_item);
    break;
  case DCCP_TRANSPORT_PARAMETER_TYPE:
    dissect_dccp_transport_parameter(parameter_tvb, pinfo, parameter_tree);
    break;
  case SCTP_TRANSPORT_PARAMETER_TYPE:
    dissect_sctp_transport_parameter(parameter_tvb, pinfo, parameter_tree);
    break;
  case TCP_TRANSPORT_PARAMETER_TYPE:
    dissect_tcp_transport_parameter(parameter_tvb, pinfo, parameter_tree);
    break;
  case UDP_TRANSPORT_PARAMETER_TYPE:
    dissect_udp_transport_parameter(parameter_tvb, pinfo, parameter_tree);
    break;
  case UDP_LITE_TRANSPORT_PARAMETER_TYPE:
    dissect_udp_lite_transport_parameter(parameter_tvb, pinfo, parameter_tree);
    break;
  case POOL_MEMBER_SELECTION_POLICY_PARAMETER_TYPE:
    dissect_pool_member_selection_policy_parameter(parameter_tvb, parameter_tree);
    break;
  case POOL_HANDLE_PARAMETER_TYPE:
    dissect_pool_handle_parameter(parameter_tvb, parameter_tree);
    break;
  case POOL_ELEMENT_PARAMETER_TYPE:
    dissect_pool_element_parameter(parameter_tvb, pinfo, parameter_tree);
    break;
  case SERVER_INFORMATION_PARAMETER_TYPE:
    dissect_server_information_parameter(parameter_tvb, pinfo, parameter_tree);
    break;
  case OPERATION_ERROR_PARAMETER_TYPE:
    dissect_operation_error_parameter(parameter_tvb, pinfo, parameter_tree);
    break;
  case COOKIE_PARAMETER_TYPE:
    dissect_cookie_parameter(parameter_tvb, parameter_tree, parameter_item);
    break;
  case PE_IDENTIFIER_PARAMETER_TYPE:
    dissect_pe_identifier_parameter(parameter_tvb, parameter_tree, parameter_item);
    break;
  case PE_CHECKSUM_PARAMETER_TYPE:
    dissect_pe_checksum_parameter(parameter_tvb, parameter_tree, parameter_item);
    break;
  case HANDLE_RESOLUTION_OPTION_PARAMETER_TYPE:
    dissect_handle_resolution_option_parameter(parameter_tvb, parameter_tree);
    break;
  default:
    dissect_unknown_parameter(parameter_tvb, parameter_tree, parameter_item);
    break;
  };
  decrement_dissection_depth(pinfo);

  if (padding_length > 0)
    proto_tree_add_item(parameter_tree, hf_parameter_padding, parameter_tvb, PARAMETER_HEADER_OFFSET + length, padding_length, ENC_NA);
}

static void
// NOLINTNEXTLINE(misc-no-recursion)
dissect_parameters(tvbuff_t *parameters_tvb, packet_info *pinfo, proto_tree *tree)
{
  gint offset, length, total_length, remaining_length;
  tvbuff_t *parameter_tvb;

  offset = 0;
  while((remaining_length = tvb_reported_length_remaining(parameters_tvb, offset)) > 0) {
    length       = tvb_get_ntohs(parameters_tvb, offset + PARAMETER_LENGTH_OFFSET);
    total_length = WS_ROUNDUP_4(length);
    if (remaining_length >= length)
      total_length = MIN(total_length, remaining_length);
    /* create a tvb for the parameter including the padding bytes */
    parameter_tvb  = tvb_new_subset_length(parameters_tvb, offset, total_length);
    dissect_parameter(parameter_tvb, pinfo, tree);
    /* get rid of the handled parameter */
    offset += total_length;
  }
}

/* Dissectors for messages. This is specific to ASAP */

#define REGISTRATION_MESSAGE_TYPE               0x01
#define DEREGISTRATION_MESSAGE_TYPE             0x02
#define REGISTRATION_RESPONSE_MESSAGE_TYPE      0x03
#define DEREGISTRATION_RESPONSE_MESSAGE_TYPE    0x04
#define HANDLE_RESOLUTION_MESSAGE_TYPE          0x05
#define HANDLE_RESOLUTION_RESPONSE_MESSAGE_TYPE 0x06
#define ENDPOINT_KEEP_ALIVE_MESSAGE_TYPE        0x07
#define ENDPOINT_KEEP_ALIVE_ACK_MESSAGE_TYPE    0x08
#define ENDPOINT_UNREACHABLE_MESSAGE_TYPE       0x09
#define SERVER_ANNOUNCE_MESSAGE_TYPE            0x0a
#define COOKIE_MESSAGE_TYPE                     0x0b
#define COOKIE_ECHO_MESSAGE_TYPE                0x0c
#define BUSINESS_CARD_MESSAGE_TYPE              0x0d
#define ERROR_MESSAGE_TYPE                      0x0e

static const value_string message_type_values[] = {
  { REGISTRATION_MESSAGE_TYPE,               "ASAP Registration" },
  { DEREGISTRATION_MESSAGE_TYPE,             "ASAP Deregistration" },
  { REGISTRATION_RESPONSE_MESSAGE_TYPE,      "ASAP Registration Response" },
  { DEREGISTRATION_RESPONSE_MESSAGE_TYPE,    "ASAP Deregistration Response" },
  { HANDLE_RESOLUTION_MESSAGE_TYPE,          "ASAP Handle Resolution" },
  { HANDLE_RESOLUTION_RESPONSE_MESSAGE_TYPE, "ASAP Handle Resolution Response" },
  { ENDPOINT_KEEP_ALIVE_MESSAGE_TYPE,        "ASAP Endpoint Keep-Alive" },
  { ENDPOINT_KEEP_ALIVE_ACK_MESSAGE_TYPE,    "ASAP Endpoint Keep-Alive Acknowledgement" },
  { ENDPOINT_UNREACHABLE_MESSAGE_TYPE,       "ASAP Endpoint Unreachable" },
  { SERVER_ANNOUNCE_MESSAGE_TYPE,            "ASAP Server Announce" },
  { COOKIE_MESSAGE_TYPE,                     "ASAP Cookie" },
  { COOKIE_ECHO_MESSAGE_TYPE,                "ASAP Cookie Echo" },
  { BUSINESS_CARD_MESSAGE_TYPE,              "ASAP Business Card" },
  { ERROR_MESSAGE_TYPE,                      "ASAP Error" },
  { 0,                                       NULL } };

#define SERVER_IDENTIFIER_OFFSET MESSAGE_VALUE_OFFSET
#define SERVER_IDENTIFIER_LENGTH 4

#define HOME_ENRP_SERVER_BIT_MASK 0x01
#define REJECT_BIT_MASK           0x01

static const true_false_string home_enrp_server_bit_value = {
  "Want to be new ENRP server",
  "Do not want to be new ENRP server"
};

static const true_false_string reject_bit_value = {
  "Rejected",
  "Accepted"
};

static void
// NOLINTNEXTLINE(misc-no-recursion)
dissect_asap_message(tvbuff_t *message_tvb, packet_info *pinfo, proto_tree *asap_tree)
{
  asap_tap_rec_t *tap_rec;
  tvbuff_t       *parameters_tvb;
  proto_item     *flags_item;
  proto_tree     *flags_tree;
  guint8          type;

  type = tvb_get_guint8(message_tvb, MESSAGE_TYPE_OFFSET);
  /* pinfo is NULL only if dissect_asap_message is called via dissect_error_cause */
  if (!pinfo->flags.in_error_pkt) {
    tap_rec = wmem_new0(pinfo->pool, asap_tap_rec_t);
    tap_rec->type        = type;
    tap_rec->size        = tvb_get_ntohs(message_tvb, MESSAGE_LENGTH_OFFSET);
    tap_rec->type_string = val_to_str_const(tap_rec->type, message_type_values, "Unknown ASAP type");
    tap_queue_packet(asap_tap, pinfo, tap_rec);

    col_add_fstr(pinfo->cinfo, COL_INFO, "%s ", val_to_str_const(type, message_type_values, "Unknown ASAP type"));
  }

  if (asap_tree) {
    proto_tree_add_item(asap_tree, hf_message_type,   message_tvb, MESSAGE_TYPE_OFFSET,   MESSAGE_TYPE_LENGTH,   ENC_BIG_ENDIAN);
    flags_item = proto_tree_add_item(asap_tree, hf_message_flags,  message_tvb, MESSAGE_FLAGS_OFFSET,  MESSAGE_FLAGS_LENGTH,  ENC_BIG_ENDIAN);
    flags_tree = proto_item_add_subtree(flags_item, ett_asap_flags);
    if (type == REGISTRATION_RESPONSE_MESSAGE_TYPE) {
      proto_tree_add_item(flags_tree, hf_reject_bit, message_tvb, MESSAGE_FLAGS_OFFSET, MESSAGE_FLAGS_LENGTH, ENC_BIG_ENDIAN);
    }
    if (type == ENDPOINT_KEEP_ALIVE_MESSAGE_TYPE) {
      proto_tree_add_item(flags_tree, hf_home_enrp_server_bit, message_tvb, MESSAGE_FLAGS_OFFSET, MESSAGE_FLAGS_LENGTH, ENC_BIG_ENDIAN);
    }
    proto_tree_add_item(asap_tree, hf_message_length, message_tvb, MESSAGE_LENGTH_OFFSET, MESSAGE_LENGTH_LENGTH, ENC_BIG_ENDIAN);
    if ((type == SERVER_ANNOUNCE_MESSAGE_TYPE) || (type == ENDPOINT_KEEP_ALIVE_MESSAGE_TYPE)) {
      proto_tree_add_item(asap_tree, hf_server_identifier, message_tvb, SERVER_IDENTIFIER_OFFSET, SERVER_IDENTIFIER_LENGTH, ENC_BIG_ENDIAN);
      parameters_tvb = tvb_new_subset_remaining(message_tvb, MESSAGE_VALUE_OFFSET + SERVER_IDENTIFIER_LENGTH);
    } else {
      parameters_tvb = tvb_new_subset_remaining(message_tvb, MESSAGE_VALUE_OFFSET);
    }
    dissect_parameters(parameters_tvb, pinfo, asap_tree);
    }
}

static int
// NOLINTNEXTLINE(misc-no-recursion)
dissect_asap(tvbuff_t *message_tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
  proto_item *asap_item;
  proto_tree *asap_tree;

  /* pinfo is NULL only if dissect_asap is called from dissect_error_cause */
  if (!pinfo->flags.in_error_pkt) {
    col_set_str(pinfo->cinfo, COL_PROTOCOL, "ASAP");
  }

  /* create the asap protocol tree */
  asap_item = proto_tree_add_item(tree, proto_asap, message_tvb, 0, -1, ENC_NA);
  asap_tree = proto_item_add_subtree(asap_item, ett_asap);

  /* dissect the message */
  dissect_asap_message(message_tvb, pinfo, asap_tree);
  return tvb_captured_length(message_tvb);
}

/* TAP STAT INFO */
typedef enum
{
  MESSAGE_TYPE_COLUMN = 0,
  MESSAGES_COLUMN,
  MESSAGES_SHARE_COLUMN,
  BYTES_COLUMN,
  BYTES_SHARE_COLUMN,
  FIRST_SEEN_COLUMN,
  LAST_SEEN_COLUMN,
  INTERVAL_COLUMN,
  MESSAGE_RATE_COLUMN,
  BYTE_RATE_COLUMN
} asap_stat_columns;

static stat_tap_table_item asap_stat_fields[] = {
  { TABLE_ITEM_STRING, TAP_ALIGN_LEFT,  "ASAP Message Type",    "%-25s"    },
  { TABLE_ITEM_UINT,   TAP_ALIGN_RIGHT, "Messages ",            "%u"       },
  { TABLE_ITEM_UINT,   TAP_ALIGN_RIGHT, "Messages Share (%)"  , "%1.3f %%" },
  { TABLE_ITEM_UINT,   TAP_ALIGN_RIGHT, "Bytes (B)",            "%u"       },
  { TABLE_ITEM_UINT,   TAP_ALIGN_RIGHT, "Bytes Share (%) ",     "%1.3f %%" },
  { TABLE_ITEM_FLOAT,  TAP_ALIGN_LEFT,  "First Seen (s)",       "%1.6f"    },
  { TABLE_ITEM_FLOAT,  TAP_ALIGN_LEFT,  "Last Seen (s)",        "%1.6f"    },
  { TABLE_ITEM_FLOAT,  TAP_ALIGN_LEFT,  "Interval (s)",         "%1.6f"    },
  { TABLE_ITEM_FLOAT,  TAP_ALIGN_LEFT,  "Message Rate (Msg/s)", "%1.2f"    },
  { TABLE_ITEM_FLOAT,  TAP_ALIGN_LEFT,  "Byte Rate (B/s)",      "%1.2f"    }
};

static void asap_stat_init(stat_tap_table_ui* new_stat)
{
  const char *table_name = "ASAP Statistics";
  int num_fields = sizeof(asap_stat_fields)/sizeof(stat_tap_table_item);
  stat_tap_table *table;
  int i = 0;
  stat_tap_table_item_type items[sizeof(asap_stat_fields)/sizeof(stat_tap_table_item)];

  table = stat_tap_find_table(new_stat, table_name);
  if (table) {
    if (new_stat->stat_tap_reset_table_cb) {
      new_stat->stat_tap_reset_table_cb(table);
    }
    return;
  }

  table = stat_tap_init_table(table_name, num_fields, 0, NULL);
  stat_tap_add_table(new_stat, table);

  memset(items, 0x0, sizeof(items));
  /* Add a row for each value type */
  while (message_type_values[i].strptr) {
    items[MESSAGE_TYPE_COLUMN].type                = TABLE_ITEM_STRING;
    items[MESSAGE_TYPE_COLUMN].value.string_value  = message_type_values[i].strptr;
    items[MESSAGES_COLUMN].type                    = TABLE_ITEM_UINT;
    items[MESSAGES_COLUMN].value.uint_value        = 0;
    items[MESSAGES_SHARE_COLUMN].type              = TABLE_ITEM_NONE;
    items[MESSAGES_SHARE_COLUMN].value.float_value = -1.0;
    items[BYTES_COLUMN].type                       = TABLE_ITEM_UINT;
    items[BYTES_COLUMN].value.uint_value           = 0;
    items[BYTES_SHARE_COLUMN].type                 = TABLE_ITEM_NONE;
    items[BYTES_SHARE_COLUMN].value.float_value    = -1.0;
    items[FIRST_SEEN_COLUMN].type                  = TABLE_ITEM_NONE;
    items[FIRST_SEEN_COLUMN].value.float_value     = DBL_MAX;
    items[LAST_SEEN_COLUMN].type                   = TABLE_ITEM_NONE;
    items[LAST_SEEN_COLUMN].value.float_value      = DBL_MIN;
    items[INTERVAL_COLUMN].type                    = TABLE_ITEM_NONE;
    items[INTERVAL_COLUMN].value.float_value       = -1.0;
    items[MESSAGE_RATE_COLUMN].type                = TABLE_ITEM_NONE;
    items[MESSAGE_RATE_COLUMN].value.float_value   = -1.0;
    items[BYTE_RATE_COLUMN].type                   = TABLE_ITEM_NONE;
    items[BYTE_RATE_COLUMN].value.float_value      = -1.0;
    stat_tap_init_table_row(table, i, num_fields, items);
    i++;
  }
}

static tap_packet_status
asap_stat_packet(void* tapdata, packet_info* pinfo _U_, epan_dissect_t* edt _U_, const void* data, tap_flags_t flags _U_)
{
  stat_data_t*              stat_data = (stat_data_t*)tapdata;
  const asap_tap_rec_t*     tap_rec   = (const asap_tap_rec_t*)data;
  stat_tap_table*           table;
  stat_tap_table_item_type* msg_data;
  gint                      idx;
  guint64                   messages;
  guint64                   bytes;
  int                       i         = 0;
  double                    firstSeen = -1.0;
  double                    lastSeen  = -1.0;

  idx = str_to_val_idx(tap_rec->type_string, message_type_values);
  if (idx < 0)
    return TAP_PACKET_DONT_REDRAW;

  table = g_array_index(stat_data->stat_tap_data->tables, stat_tap_table*, 0);

  /* Update packets counter */
  asap_total_msgs++;
  msg_data = stat_tap_get_field_data(table, idx, MESSAGES_COLUMN);
  msg_data->value.uint_value++;
  messages = msg_data->value.uint_value;
  stat_tap_set_field_data(table, idx, MESSAGES_COLUMN, msg_data);

  /* Update bytes counter */
  asap_total_bytes += tap_rec->size;
  msg_data = stat_tap_get_field_data(table, idx, BYTES_COLUMN);
  msg_data->value.uint_value += tap_rec->size;
  bytes = msg_data->value.uint_value;
  stat_tap_set_field_data(table, idx, BYTES_COLUMN, msg_data);

  /* Update messages and bytes share */
  while (message_type_values[i].strptr) {
    msg_data = stat_tap_get_field_data(table, i, MESSAGES_COLUMN);
    const guint m = msg_data->value.uint_value;
    msg_data = stat_tap_get_field_data(table, i, BYTES_COLUMN);
    const guint b = msg_data->value.uint_value;

    msg_data = stat_tap_get_field_data(table, i, MESSAGES_SHARE_COLUMN);
    msg_data->type = TABLE_ITEM_FLOAT;
    msg_data->value.float_value = 100.0 * m / (double)asap_total_msgs;
    stat_tap_set_field_data(table, i, MESSAGES_SHARE_COLUMN, msg_data);

    msg_data = stat_tap_get_field_data(table, i, BYTES_SHARE_COLUMN);
    msg_data->type = TABLE_ITEM_FLOAT;
    msg_data->value.float_value = 100.0 * b / (double)asap_total_bytes;
    stat_tap_set_field_data(table, i, BYTES_SHARE_COLUMN, msg_data);
    i++;
  }

  /* Update first seen time */
  if (pinfo->presence_flags & PINFO_HAS_TS) {
    msg_data = stat_tap_get_field_data(table, idx, FIRST_SEEN_COLUMN);
    msg_data->type = TABLE_ITEM_FLOAT;
    msg_data->value.float_value = MIN(msg_data->value.float_value, nstime_to_sec(&pinfo->rel_ts));
    firstSeen = msg_data->value.float_value;
    stat_tap_set_field_data(table, idx, FIRST_SEEN_COLUMN, msg_data);
  }

  /* Update last seen time */
  if (pinfo->presence_flags & PINFO_HAS_TS) {
    msg_data = stat_tap_get_field_data(table, idx, LAST_SEEN_COLUMN);
    msg_data->type = TABLE_ITEM_FLOAT;
    msg_data->value.float_value = MAX(msg_data->value.float_value, nstime_to_sec(&pinfo->rel_ts));
    lastSeen = msg_data->value.float_value;
    stat_tap_set_field_data(table, idx, LAST_SEEN_COLUMN, msg_data);
  }

  if ((lastSeen - firstSeen) > 0.0) {
    /* Update interval */
    msg_data = stat_tap_get_field_data(table, idx, INTERVAL_COLUMN);
    msg_data->type = TABLE_ITEM_FLOAT;
    msg_data->value.float_value = lastSeen - firstSeen;
    stat_tap_set_field_data(table, idx, INTERVAL_COLUMN, msg_data);

    /* Update message rate */
    msg_data = stat_tap_get_field_data(table, idx, MESSAGE_RATE_COLUMN);
    msg_data->type = TABLE_ITEM_FLOAT;
    msg_data->value.float_value = messages / (lastSeen - firstSeen);
    stat_tap_set_field_data(table, idx, MESSAGE_RATE_COLUMN, msg_data);

    /* Update byte rate */
    msg_data = stat_tap_get_field_data(table, idx, BYTE_RATE_COLUMN);
    msg_data->type = TABLE_ITEM_FLOAT;
    msg_data->value.float_value = bytes / (lastSeen - firstSeen);
    stat_tap_set_field_data(table, idx, BYTE_RATE_COLUMN, msg_data);
  }

  return TAP_PACKET_REDRAW;
}

static void
asap_stat_reset(stat_tap_table* table)
{
  guint element;
  stat_tap_table_item_type* item_data;

  for (element = 0; element < table->num_elements; element++) {
    item_data = stat_tap_get_field_data(table, element, MESSAGES_COLUMN);
    item_data->value.uint_value = 0;
    stat_tap_set_field_data(table, element, MESSAGES_COLUMN, item_data);

    item_data = stat_tap_get_field_data(table, element, MESSAGES_SHARE_COLUMN);
    item_data->type = TABLE_ITEM_NONE;
    item_data->value.float_value = -1.0;
    stat_tap_set_field_data(table, element, MESSAGES_SHARE_COLUMN, item_data);

    item_data = stat_tap_get_field_data(table, element, BYTES_COLUMN);
    item_data->value.uint_value = 0;
    stat_tap_set_field_data(table, element, BYTES_COLUMN, item_data);

    item_data = stat_tap_get_field_data(table, element, BYTES_SHARE_COLUMN);
    item_data->type = TABLE_ITEM_NONE;
    item_data->value.float_value = -1.0;
    stat_tap_set_field_data(table, element, BYTES_SHARE_COLUMN, item_data);

    item_data = stat_tap_get_field_data(table, element, FIRST_SEEN_COLUMN);
    item_data->type = TABLE_ITEM_NONE;
    item_data->value.float_value = DBL_MAX;
    stat_tap_set_field_data(table, element, FIRST_SEEN_COLUMN, item_data);

    item_data = stat_tap_get_field_data(table, element, LAST_SEEN_COLUMN);
    item_data->type = TABLE_ITEM_NONE;
    item_data->value.float_value = DBL_MIN;
    stat_tap_set_field_data(table, element, LAST_SEEN_COLUMN, item_data);

    item_data = stat_tap_get_field_data(table, element, INTERVAL_COLUMN);
    item_data->type = TABLE_ITEM_NONE;
    item_data->value.float_value = -1.0;
    stat_tap_set_field_data(table, element, INTERVAL_COLUMN, item_data);

    item_data = stat_tap_get_field_data(table, element, MESSAGE_RATE_COLUMN);
    item_data->type = TABLE_ITEM_NONE;
    item_data->value.float_value = -1.0;
    stat_tap_set_field_data(table, element, MESSAGE_RATE_COLUMN, item_data);

    item_data = stat_tap_get_field_data(table, element, BYTE_RATE_COLUMN);
    item_data->type = TABLE_ITEM_NONE;
    item_data->value.float_value = -1.0;
    stat_tap_set_field_data(table, element, BYTE_RATE_COLUMN, item_data);
  }
  asap_total_msgs  = 0;
  asap_total_bytes = 0;
}

/* Register the protocol with Wireshark */
void
proto_register_asap(void)
{

  /* Setup list of header fields */
  static hf_register_info hf[] = {
    { &hf_message_type,           { "Type",                        "asap.message_type",                             FT_UINT8,   BASE_DEC,  VALS(message_type_values),        0x0,                       NULL, HFILL } },
    { &hf_message_flags,          { "Flags",                       "asap.message_flags",                            FT_UINT8,   BASE_HEX,  NULL,                             0x0,                       NULL, HFILL } },
    { &hf_message_length,         { "Length",                      "asap.message_length",                           FT_UINT16,  BASE_DEC,  NULL,                             0x0,                       NULL, HFILL } },
    { &hf_cause_code,             { "Cause Code",                  "asap.cause_code",                               FT_UINT16,  BASE_HEX,  VALS(cause_code_values),          0x0,                       NULL, HFILL } },
    { &hf_cause_length,           { "Cause Length",                "asap.cause_length",                             FT_UINT16,  BASE_DEC,  NULL,                             0x0,                       NULL, HFILL } },
    { &hf_cause_info,             { "Cause Info",                  "asap.cause_info",                               FT_BYTES,   BASE_NONE, NULL,                             0x0,                       NULL, HFILL } },
    { &hf_cause_padding,          { "Padding",                     "asap.cause_padding",                            FT_BYTES,   BASE_NONE, NULL,                             0x0,                       NULL, HFILL } },
    { &hf_parameter_type,         { "Parameter Type",              "asap.parameter_type",                           FT_UINT16,  BASE_HEX,  VALS(parameter_type_values),      0x0,                       NULL, HFILL } },
    { &hf_parameter_length,       { "Parameter Length",            "asap.parameter_length",                         FT_UINT16,  BASE_DEC,  NULL,                             0x0,                       NULL, HFILL } },
    { &hf_parameter_value,        { "Parameter Value",             "asap.parameter_value",                          FT_BYTES,   BASE_NONE, NULL,                             0x0,                       NULL, HFILL } },
    { &hf_parameter_padding,      { "Padding",                     "asap.parameter_padding",                        FT_BYTES,   BASE_NONE, NULL,                             0x0,                       NULL, HFILL } },
    { &hf_parameter_ipv4_address, { "IP Version 4 Address",        "asap.ipv4_address",                             FT_IPv4,    BASE_NONE, NULL,                             0x0,                       NULL, HFILL } },
    { &hf_parameter_ipv6_address, { "IP Version 6 Address",        "asap.ipv6_address",                             FT_IPv6,    BASE_NONE, NULL,                             0x0,                       NULL, HFILL } },
    { &hf_dccp_port,              { "Port",                        "asap.dccp_transport_port",                      FT_UINT16,  BASE_DEC,  NULL,                             0x0,                       NULL, HFILL } },
    { &hf_dccp_reserved,          { "Reserved",                    "asap.dccp_transport_reserved",                  FT_UINT16,  BASE_DEC,  NULL,                             0x0,                       NULL, HFILL } },
    { &hf_dccp_service_code,      { "Service Code",                "asap.dccp_transport_service_code",              FT_UINT16,  BASE_DEC,  NULL,                             0x0,                       NULL, HFILL } },
    { &hf_sctp_port,              { "Port",                        "asap.sctp_transport_port",                      FT_UINT16,  BASE_DEC,  NULL,                             0x0,                       NULL, HFILL } },
    { &hf_transport_use,          { "Transport Use",               "asap.transport_use",                            FT_UINT16,  BASE_DEC,  VALS(transport_use_values),       0x0,                       NULL, HFILL } },
    { &hf_tcp_port,               { "Port",                        "asap.tcp_transport_port",                       FT_UINT16,  BASE_DEC,  NULL,                             0x0,                       NULL, HFILL } },
    { &hf_udp_port,               { "Port",                        "asap.udp_transport_port",                       FT_UINT16,  BASE_DEC,  NULL,                             0x0,                       NULL, HFILL } },
    { &hf_udp_reserved,           { "Reserved",                    "asap.udp_transport_reserved",                   FT_UINT16,  BASE_DEC,  NULL,                             0x0,                       NULL, HFILL } },
    { &hf_udp_lite_port,          { "Port",                        "asap.udp_lite_transport_port",                  FT_UINT16,  BASE_DEC,  NULL,                             0x0,                       NULL, HFILL } },
    { &hf_udp_lite_reserved,      { "Reserved",                    "asap.udp_lite_transport_reserved",              FT_UINT16,  BASE_DEC,  NULL,                             0x0,                       NULL, HFILL } },
    { &hf_policy_type,            { "Policy Type",                 "asap.pool_member_selection_policy_type",        FT_UINT32,  BASE_HEX,  VALS(policy_type_values),         0x0,                       NULL, HFILL } },
    { &hf_policy_weight,          { "Policy Weight",               "asap.pool_member_selection_policy_weight",      FT_UINT32,  BASE_DEC,  NULL,                             0x0,                       NULL, HFILL } },
    { &hf_policy_priority,        { "Policy Priority",             "asap.pool_member_selection_policy_priority",    FT_UINT32,  BASE_DEC,  NULL,                             0x0,                       NULL, HFILL } },
    { &hf_policy_load,            { "Policy Load",                 "asap.pool_member_selection_policy_load",        FT_DOUBLE,  BASE_NONE,  NULL,                             0x0,                       NULL, HFILL } },
    { &hf_policy_degradation,     { "Policy Degradation",          "asap.pool_member_selection_policy_degradation", FT_DOUBLE,  BASE_NONE,  NULL,                             0x0,                       NULL, HFILL } },
    { &hf_policy_loaddpf,         { "Policy Load DPF",             "asap.pool_member_selection_policy_load_dpf",    FT_DOUBLE,  BASE_NONE,  NULL,                             0x0,                       NULL, HFILL } },
    { &hf_policy_weightdpf,       { "Policy Weight DPF",           "asap.pool_member_selection_policy_weight_dpf",  FT_DOUBLE,  BASE_NONE,  NULL,                             0x0,                       NULL, HFILL } },
    { &hf_policy_distance,        { "Policy Distance",             "asap.pool_member_selection_policy_distance",    FT_UINT32,  BASE_DEC,  NULL,                             0x0,                       NULL, HFILL } },
    { &hf_policy_value,           { "Policy Value",                "asap.pool_member_selection_policy_value",       FT_BYTES,   BASE_NONE, NULL,                             0x0,                       NULL, HFILL } },
    { &hf_pool_handle,            { "Pool Handle",                 "asap.pool_handle_pool_handle",                  FT_BYTES,   BASE_NONE,  NULL,                             0x0,                       NULL, HFILL } },
    { &hf_pe_pe_identifier,       { "PE Identifier",               "asap.pool_element_pe_identifier",               FT_UINT32,  BASE_HEX,  NULL,                             0x0,                       NULL, HFILL } },
    { &hf_home_enrp_id,           { "Home ENRP Server Identifier", "asap.pool_element_home_enrp_server_identifier", FT_UINT32,  BASE_HEX,  NULL,                             0x0,                       NULL, HFILL } },
    { &hf_reg_life,               { "Registration Life",           "asap.pool_element_registration_life",           FT_INT32,   BASE_DEC|BASE_UNIT_STRING, &units_milliseconds, 0x0,                       NULL, HFILL } },
    { &hf_cookie,                 { "Cookie",                      "asap.cookie",                                   FT_BYTES,   BASE_NONE,  NULL,                             0x0,                       NULL, HFILL } },
    { &hf_pe_identifier,          { "PE Identifier",               "asap.pe_identifier",                            FT_UINT32,  BASE_HEX,  NULL,                             0x0,                       NULL, HFILL } },
    { &hf_pe_checksum,            { "PE Checksum",                 "asap.pe_checksum",                              FT_UINT16,  BASE_HEX,  NULL,                             0x0,                       NULL, HFILL } },
    { &hf_hropt_items,            { "Items",                       "asap.hropt_items",                              FT_UINT32,  BASE_DEC,  NULL,                             0x0,                       NULL, HFILL } },
    { &hf_server_identifier,      { "Server Identifier",           "asap.server_identifier",                        FT_UINT32,  BASE_HEX,  NULL,                             0x0,                       NULL, HFILL } },
    { &hf_home_enrp_server_bit,   { "H Bit",                       "asap.h_bit",                                    FT_BOOLEAN, 8,         TFS(&home_enrp_server_bit_value), HOME_ENRP_SERVER_BIT_MASK, NULL, HFILL } },
    { &hf_reject_bit,             { "R Bit",                       "asap.r_bit",                                    FT_BOOLEAN, 8,         TFS(&reject_bit_value),           REJECT_BIT_MASK,           NULL, HFILL } },
  };

  /* Setup protocol subtree array */
  static gint *ett[] = {
    &ett_asap,
    &ett_asap_flags,
    &ett_asap_parameter,
    &ett_asap_cause,
  };

  static tap_param asap_stat_params[] = {
    { PARAM_FILTER, "filter", "Filter", NULL, TRUE }
  };

  static stat_tap_table_ui asap_stat_table = {
    REGISTER_STAT_GROUP_RSERPOOL,
    "ASAP Statistics",
    "asap",
    "asap,stat",
    asap_stat_init,
    asap_stat_packet,
    asap_stat_reset,
    NULL,
    NULL,
    sizeof(asap_stat_fields)/sizeof(stat_tap_table_item), asap_stat_fields,
    sizeof(asap_stat_params)/sizeof(tap_param), asap_stat_params,
    NULL,
    0
  };

  /* Register the protocol name and description */
  proto_asap = proto_register_protocol("Aggregate Server Access Protocol", "ASAP",  "asap");

  /* Required function calls to register the header fields and subtrees used */
  proto_register_field_array(proto_asap, hf, array_length(hf));
  proto_register_subtree_array(ett, array_length(ett));
  asap_tap = register_tap("asap");

  asap_handle = register_dissector("asap", dissect_asap, proto_asap);

  register_stat_tap_table_ui(&asap_stat_table);
}

void
proto_reg_handoff_asap(void)
{
  dissector_add_uint("sctp.ppi",  ASAP_PAYLOAD_PROTOCOL_ID, asap_handle);
  dissector_add_uint_with_preference("udp.port",  ASAP_UDP_PORT,  asap_handle);
  dissector_add_uint_with_preference("tcp.port",  ASAP_TCP_PORT,  asap_handle);
  dissector_add_uint("sctp.port", ASAP_SCTP_PORT, asap_handle);
}

/*
 * Editor modelines  -  https://www.wireshark.org/tools/modelines.html
 *
 * Local Variables:
 * c-basic-offset: 2
 * tab-width: 8
 * indent-tabs-mode: nil
 * End:
 *
 * ex: set shiftwidth=2 tabstop=8 expandtab:
 * :indentSize=2:tabSize=8:noTabs=true:
 */
