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wireshark/epan/dissectors/packet-enrp.c

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/* packet-enrp.c
* Routines for Endpoint Handlespace Redundancy Protocol (ENRP)
* It is hopefully (needs testing) compliant to
* RFC 5353
* RFC 5354
* RFC 5356
* http://www.ietf.org/internet-drafts/draft-dreibholz-enrp-takeover-00.txt
*
* The code is not as simple as possible for the current protocol
* but allows to be easily adopted to future versions of the protocol.
* I will reconsider this after the protocol is an RFC.
*
* TODO:
* - check message lengths
*
* Copyright 2004, 2005, 2006, 2007 Michael Tuexen <tuexen [AT] fh-muenster.de>
* Copyright 2008 Thomas Dreibholz <dreibh [AT] iem.uni-due.de>
*
* $Id$
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* Copied from README.developer
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include <epan/packet.h>
#include <epan/sctpppids.h>
void proto_register_enrp(void);
void proto_reg_handoff_enrp(void);
/* Initialize the protocol and registered fields */
static int proto_enrp = -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_message_value = -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_sender_servers_id = -1;
static int hf_receiver_servers_id = -1;
static int hf_target_servers_id = -1;
static int hf_update_action = -1;
static int hf_pmu_reserved = -1;
static int hf_reply_required_bit = -1;
static int hf_own_children_only_bit = -1;
static int hf_more_to_send_bit = -1;
static int hf_reject_bit = -1;
static int hf_tos_bit = -1;
/* Initialize the subtree pointers */
static gint ett_enrp = -1;
static gint ett_enrp_parameter = -1;
static gint ett_enrp_cause = -1;
static gint ett_enrp_flags = -1;
static void
dissect_parameters(tvbuff_t *, proto_tree *);
static void
dissect_parameter(tvbuff_t *, proto_tree *);
static void
dissect_enrp(tvbuff_t *, packet_info *, proto_tree *);
#define ADD_PADDING(x) ((((x) + 3) >> 2) << 2)
#define ENRP_UDP_PORT 9901
#define ENRP_SCTP_PORT 9901
/* Dissectors for error causes. This is common for ASAP and ENRP. */
#define CAUSE_CODE_LENGTH 2
#define CAUSE_LENGTH_LENGTH 2
#define CAUSE_HEADER_LENGTH (CAUSE_CODE_LENGTH + CAUSE_LENGTH_LENGTH)
#define CAUSE_HEADER_OFFSET 0
#define CAUSE_CODE_OFFSET CAUSE_HEADER_OFFSET
#define CAUSE_LENGTH_OFFSET (CAUSE_CODE_OFFSET + CAUSE_CODE_LENGTH)
#define CAUSE_INFO_OFFSET (CAUSE_LENGTH_OFFSET + CAUSE_LENGTH_LENGTH)
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"));
}
#define UNRECOGNIZED_PARAMETER_CAUSE_CODE 0x1
#define UNRECONGNIZED_MESSAGE_CAUSE_CODE 0x2
#define INVALID_VALUES 0x3
#define NON_UNIQUE_PE_IDENTIFIER 0x4
#define POOLING_POLICY_INCONSISTENT_CAUSE_CODE 0x5
#define LACK_OF_RESOURCES_CAUSE_CODE 0x6
#define INCONSISTENT_TRANSPORT_TYPE_CAUSE_CODE 0x7
#define INCONSISTENT_DATA_CONTROL_CONFIGURATION_CAUSE_CODE 0x8
#define UNKNOWN_POOL_HANDLE 0x9
#define REJECTION_DUE_TO_SECURITY_CAUSE_CODE 0xa
static const value_string cause_code_values[] = {
{ UNRECOGNIZED_PARAMETER_CAUSE_CODE, "Unrecognized parameter" },
{ UNRECONGNIZED_MESSAGE_CAUSE_CODE, "Unrecognized message" },
{ INVALID_VALUES, "Invalid values" },
{ NON_UNIQUE_PE_IDENTIFIER, "Non-unique PE identifier" },
{ POOLING_POLICY_INCONSISTENT_CAUSE_CODE, "Pooling policy inconsistent" },
{ LACK_OF_RESOURCES_CAUSE_CODE, "Lack of resources" },
{ INCONSISTENT_TRANSPORT_TYPE_CAUSE_CODE, "Inconsistent transport type" },
{ INCONSISTENT_DATA_CONTROL_CONFIGURATION_CAUSE_CODE, "Inconsistent data/control type" },
{ UNKNOWN_POOL_HANDLE, "Unknown pool handle" },
{ REJECTION_DUE_TO_SECURITY_CAUSE_CODE, "Rejected due to security considerations" },
{ 0, NULL } };
static void
dissect_error_cause(tvbuff_t *cause_tvb, proto_tree *parameter_tree)
{
guint16 code, length, padding_length;
proto_item *cause_item;
proto_tree *cause_tree;
tvbuff_t *parameter_tvb, *message_tvb;
code = tvb_get_ntohs(cause_tvb, CAUSE_CODE_OFFSET);
length = tvb_get_ntohs(cause_tvb, CAUSE_LENGTH_OFFSET);
padding_length = tvb_length(cause_tvb) - length;
cause_item = proto_tree_add_text(parameter_tree, cause_tvb, CAUSE_HEADER_OFFSET, tvb_length(cause_tvb), "%s", val_to_str_const(code, cause_code_values, "Unknown error cause"));
cause_tree = proto_item_add_subtree(cause_item, ett_enrp_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, cause_tree);
break;
case UNRECONGNIZED_MESSAGE_CAUSE_CODE:
message_tvb = tvb_new_subset_remaining(cause_tvb, CAUSE_INFO_OFFSET);
dissect_enrp(message_tvb, NULL, cause_tree);
break;
case INVALID_VALUES:
parameter_tvb = tvb_new_subset_remaining(cause_tvb, CAUSE_INFO_OFFSET);
dissect_parameter(parameter_tvb, 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, 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, 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
dissect_error_causes(tvbuff_t *error_causes_tvb, 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 = ADD_PADDING(length);
error_cause_tvb = tvb_new_subset(error_causes_tvb, offset , total_length, total_length);
dissect_error_cause(error_cause_tvb, parameter_tree);
offset += total_length;
}
}
/* Dissectors for parameters. This is common for ASAP and ENRP. */
#define PARAMETER_TYPE_LENGTH 2
#define PARAMETER_LENGTH_LENGTH 2
#define PARAMETER_HEADER_LENGTH (PARAMETER_TYPE_LENGTH + PARAMETER_LENGTH_LENGTH)
#define PARAMETER_HEADER_OFFSET 0
#define PARAMETER_TYPE_OFFSET PARAMETER_HEADER_OFFSET
#define PARAMETER_LENGTH_OFFSET (PARAMETER_TYPE_OFFSET + PARAMETER_TYPE_LENGTH)
#define PARAMETER_VALUE_OFFSET (PARAMETER_LENGTH_OFFSET + PARAMETER_LENGTH_LENGTH)
#define IPV4_ADDRESS_LENGTH 4
#define IPV4_ADDRESS_OFFSET PARAMETER_VALUE_OFFSET
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(parameter_tvb, IPV4_ADDRESS_OFFSET));
}
#define IPV6_ADDRESS_LENGTH 16
#define IPV6_ADDRESS_OFFSET PARAMETER_VALUE_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(parameter_tvb, IPV6_ADDRESS_OFFSET));
}
#define DCCP_PORT_LENGTH 2
#define DCCP_RESERVED_LENGTH 2
#define DCCP_SERVICE_CODE_LENGTH 4
#define DCCP_PORT_OFFSET PARAMETER_VALUE_OFFSET
#define DCCP_RESERVED_OFFSET (DCCP_PORT_OFFSET + DCCP_PORT_LENGTH)
#define DCCP_SERVICE_CODE_OFFSET (DCCP_RESERVED_OFFSET + DCCP_RESERVED_LENGTH)
#define DCCP_ADDRESS_OFFSET (DCCP_SERVICE_CODE_OFFSET + DCCP_SERVICE_CODE_LENGTH)
static void
dissect_dccp_transport_parameter(tvbuff_t *parameter_tvb, 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, parameter_tree);
}
#define TRANSPORT_USE_DATA_ONLY 0
#define TRANSPORT_USE_DATA_PLUS_CONTROL 1
static const value_string transport_use_values[] = {
{ TRANSPORT_USE_DATA_ONLY, "Data only" },
{ TRANSPORT_USE_DATA_PLUS_CONTROL, "Data plus control" },
{ 0, NULL } };
#define SCTP_PORT_LENGTH 2
#define SCTP_TRANSPORT_USE_LENGTH 2
#define SCTP_PORT_OFFSET PARAMETER_VALUE_OFFSET
#define SCTP_TRANSPORT_USE_OFFSET (SCTP_PORT_OFFSET + SCTP_PORT_LENGTH)
#define SCTP_ADDRESS_OFFSET (SCTP_TRANSPORT_USE_OFFSET + SCTP_TRANSPORT_USE_LENGTH)
static void
dissect_sctp_transport_parameter(tvbuff_t *parameter_tvb, 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, parameter_tree);
}
#define TCP_PORT_LENGTH 2
#define TCP_TRANSPORT_USE_LENGTH 2
#define TCP_PORT_OFFSET PARAMETER_VALUE_OFFSET
#define TCP_TRANSPORT_USE_OFFSET (TCP_PORT_OFFSET + TCP_PORT_LENGTH)
#define TCP_ADDRESS_OFFSET (TCP_TRANSPORT_USE_OFFSET + TCP_TRANSPORT_USE_LENGTH)
static void
dissect_tcp_transport_parameter(tvbuff_t *parameter_tvb, 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, parameter_tree);
}
#define UDP_PORT_LENGTH 2
#define UDP_RESERVED_LENGTH 2
#define UDP_PORT_OFFSET PARAMETER_VALUE_OFFSET
#define UDP_RESERVED_OFFSET (UDP_PORT_OFFSET + UDP_PORT_LENGTH)
#define UDP_ADDRESS_OFFSET (UDP_RESERVED_OFFSET + UDP_RESERVED_LENGTH)
static void
dissect_udp_transport_parameter(tvbuff_t *parameter_tvb, 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, parameter_tree);
}
#define UDP_LITE_PORT_LENGTH 2
#define UDP_LITE_RESERVED_LENGTH 2
#define UDP_LITE_PORT_OFFSET PARAMETER_VALUE_OFFSET
#define UDP_LITE_RESERVED_OFFSET (UDP_LITE_PORT_OFFSET + UDP_LITE_PORT_LENGTH)
#define UDP_LITE_ADDRESS_OFFSET (UDP_LITE_RESERVED_OFFSET + UDP_LITE_RESERVED_LENGTH)
static void
dissect_udp_lite_transport_parameter(tvbuff_t *parameter_tvb, 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, parameter_tree);
}
#define POLICY_TYPE_LENGTH 4
#define POLICY_WEIGHT_LENGTH 4
#define POLICY_PRIORITY_LENGTH 4
#define POLICY_LOAD_LENGTH 4
#define POLICY_DEGRADATION_LENGTH 4
#define POLICY_LUDPF_LOADDPF_LENGTH 4
#define POLICY_LUDPF_DISTANCE_LENGTH 4
#define POLICY_WRANDDPF_WEIGHTDPF_LENGTH 4
#define POLICY_WRANDDPF_DISTANCE_LENGTH 4
#define POLICY_TYPE_OFFSET PARAMETER_VALUE_OFFSET
#define POLICY_VALUE_OFFSET (POLICY_TYPE_OFFSET + POLICY_TYPE_LENGTH)
#define POLICY_WEIGHT_OFFSET POLICY_VALUE_OFFSET
#define POLICY_PRIORITY_OFFSET POLICY_VALUE_OFFSET
#define POLICY_LOAD_OFFSET POLICY_VALUE_OFFSET
#define POLICY_DEGRADATION_OFFSET (POLICY_LOAD_OFFSET + POLICY_LOAD_LENGTH)
#define POLICY_LUDPF_LOADDPF_OFFSET (POLICY_LOAD_OFFSET + POLICY_LOAD_LENGTH)
#define POLICY_LUDPF_DISTANCE_OFFSET (POLICY_LUDPF_LOADDPF_OFFSET + POLICY_LUDPF_LOADDPF_LENGTH)
#define POLICY_WRANDDPF_WEIGHTDPF_OFFSET (POLICY_WEIGHT_OFFSET + POLICY_WEIGHT_LENGTH)
#define POLICY_WRANDDPF_DISTANCE_OFFSET (POLICY_WRANDDPF_WEIGHTDPF_OFFSET + POLICY_WRANDDPF_WEIGHTDPF_LENGTH)
#define ROUND_ROBIN_POLICY 0x00000001
#define WEIGHTED_ROUND_ROBIN_POLICY 0x00000002
#define RANDOM_POLICY 0x00000003
#define WEIGHTED_RANDOM_POLICY 0x00000004
#define PRIORITY_POLICY 0x00000005
#define LEAST_USED_POLICY 0x40000001
#define LEAST_USED_WITH_DEG_POLICY 0x40000002
#define PRIORITY_LEAST_USED_POLICY 0x40000003
#define RANDOMIZED_LEAST_USED_POLICY 0x40000004
#define PRIORITY_LEAST_USED_DEG_POLICY 0xb0001003
#define WEIGHTED_RANDOM_DPF_POLICY 0xb0002001
#define LEAST_USED_DPF_POLICY 0xb0002002
static const value_string policy_type_values[] = {
{ ROUND_ROBIN_POLICY, "Round Robin (RR)" },
{ WEIGHTED_ROUND_ROBIN_POLICY, "Weighted Round Robin (WRR)" },
{ RANDOM_POLICY, "Random (RAND)"},
{ WEIGHTED_RANDOM_POLICY, "Weighted Random (WRAND)" },
{ PRIORITY_POLICY, "Priority (PRI)" },
{ LEAST_USED_POLICY, "Least Used (LU)" },
{ LEAST_USED_WITH_DEG_POLICY, "Least Used with Degradation (LUD)" },
{ PRIORITY_LEAST_USED_POLICY, "Priority Least Used (PLU)" },
{ PRIORITY_LEAST_USED_DEG_POLICY, "Priority Least Used with Degradation (PLUD)" },
{ RANDOMIZED_LEAST_USED_POLICY, "Randomized Least Used (RLU)" },
{ LEAST_USED_DPF_POLICY, "Least Used with Delay Penalty Factor (LU-DPF)" },
{ WEIGHTED_RANDOM_DPF_POLICY, "Weighted Random with Delay Penalty Factor (WRAND-DPF)" },
{ 0, NULL } };
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_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;
}
}
#define POOL_HANDLE_OFFSET PARAMETER_VALUE_OFFSET
static void
dissect_pool_handle_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree)
{
guint16 handle_length;
proto_item* pi;
char* tmp;
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);
tmp = (gchar*)tvb_get_string(wmem_packet_scope(), parameter_tvb, POOL_HANDLE_OFFSET, handle_length);
proto_item_append_text(pi, " (%s)", tmp);
}
#define PE_PE_IDENTIFIER_LENGTH 4
#define HOME_ENRP_INDENTIFIER_LENGTH 4
#define REGISTRATION_LIFE_LENGTH 4
#define PE_PE_IDENTIFIER_OFFSET PARAMETER_VALUE_OFFSET
#define HOME_ENRP_INDENTIFIER_OFFSET (PE_PE_IDENTIFIER_OFFSET + PE_PE_IDENTIFIER_LENGTH)
#define REGISTRATION_LIFE_OFFSET (HOME_ENRP_INDENTIFIER_OFFSET + HOME_ENRP_INDENTIFIER_LENGTH)
#define USER_TRANSPORT_PARAMETER_OFFSET (REGISTRATION_LIFE_OFFSET + REGISTRATION_LIFE_LENGTH)
static void
dissect_pool_element_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree)
{
tvbuff_t* parameters_tvb;
proto_item* pi;
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);
pi = proto_tree_add_item(parameter_tree, hf_reg_life, parameter_tvb, REGISTRATION_LIFE_OFFSET, REGISTRATION_LIFE_LENGTH, ENC_BIG_ENDIAN);
proto_item_append_text(pi, "ms");
parameters_tvb = tvb_new_subset_remaining(parameter_tvb, USER_TRANSPORT_PARAMETER_OFFSET);
dissect_parameters(parameters_tvb, parameter_tree);
}
#define SERVER_ID_LENGTH 4
#define SERVER_ID_OFFSET PARAMETER_VALUE_OFFSET
#define SERVER_TRANSPORT_OFFSET (SERVER_ID_OFFSET + SERVER_ID_LENGTH)
static void
dissect_server_information_parameter(tvbuff_t *parameter_tvb, 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, parameter_tree);
}
#define ERROR_CAUSES_OFFSET PARAMETER_VALUE_OFFSET
static void
dissect_operation_error_parameter(tvbuff_t *parameter_tvb, 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, parameter_tree);
}
#define COOKIE_OFFSET PARAMETER_VALUE_OFFSET
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"));
}
#define PE_IDENTIFIER_LENGTH 4
#define PE_IDENTIFIER_OFFSET PARAMETER_VALUE_OFFSET
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));
}
#define PE_CHECKSUM_LENGTH 2
#define PE_CHECKSUM_OFFSET PARAMETER_VALUE_OFFSET
static void
dissect_pe_checksum_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
{
proto_tree_add_item(parameter_tree, hf_pe_checksum, parameter_tvb, PE_CHECKSUM_OFFSET, PE_CHECKSUM_LENGTH, ENC_BIG_ENDIAN);
proto_item_append_text(parameter_item, " (0x%x)", tvb_get_ntohs(parameter_tvb, PE_CHECKSUM_OFFSET));
}
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"));
}
#define IPV4_ADDRESS_PARAMETER_TYPE 0x01
#define IPV6_ADDRESS_PARAMETER_TYPE 0x02
#define DCCP_TRANSPORT_PARAMETER_TYPE 0x03
#define SCTP_TRANSPORT_PARAMETER_TYPE 0x04
#define TCP_TRANSPORT_PARAMETER_TYPE 0x05
#define UDP_TRANSPORT_PARAMETER_TYPE 0x06
#define UDP_LITE_TRANSPORT_PARAMETER_TYPE 0x07
#define POOL_MEMBER_SELECTION_POLICY_PARAMETER_TYPE 0x08
#define POOL_HANDLE_PARAMETER_TYPE 0x09
#define POOL_ELEMENT_PARAMETER_TYPE 0x0a
#define SERVER_INFORMATION_PARAMETER_TYPE 0x0b
#define OPERATION_ERROR_PARAMETER_TYPE 0x0c
#define COOKIE_PARAMETER_TYPE 0x0d
#define PE_IDENTIFIER_PARAMETER_TYPE 0x0e
#define PE_CHECKSUM_PARAMETER_TYPE 0x0f
static const value_string parameter_type_values[] = {
{ IPV4_ADDRESS_PARAMETER_TYPE, "IPV4 Address Parameter" },
{ IPV6_ADDRESS_PARAMETER_TYPE, "IPV6 Address Parameter" },
{ DCCP_TRANSPORT_PARAMETER_TYPE, "DCCP Transport Address Parameter" },
{ SCTP_TRANSPORT_PARAMETER_TYPE, "SCTP Transport Address Parameter" },
{ TCP_TRANSPORT_PARAMETER_TYPE, "TCP Transport Address Parameter" },
{ UDP_TRANSPORT_PARAMETER_TYPE, "UDP Transport Address Parameter" },
{ UDP_LITE_TRANSPORT_PARAMETER_TYPE, "UDP-Lite Transport Address Parameter" },
{ POOL_MEMBER_SELECTION_POLICY_PARAMETER_TYPE, "Pool Member Selection Policy Parameter" },
{ POOL_HANDLE_PARAMETER_TYPE, "Pool Handle Parameter" },
{ POOL_ELEMENT_PARAMETER_TYPE, "Pool Element Parameter" },
{ SERVER_INFORMATION_PARAMETER_TYPE, "Server Information Parameter" },
{ OPERATION_ERROR_PARAMETER_TYPE, "Operation Error Parameter" },
{ COOKIE_PARAMETER_TYPE, "Cookie Parameter" },
{ PE_IDENTIFIER_PARAMETER_TYPE, "Pool Element Identifier Parameter" },
{ PE_CHECKSUM_PARAMETER_TYPE, "PE Checksum Parameter" },
{ 0, NULL } };
static void
dissect_parameter(tvbuff_t *parameter_tvb, proto_tree *enrp_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_length(parameter_tvb) - length;
/* create proto_tree stuff */
parameter_item = proto_tree_add_text(enrp_tree, parameter_tvb, PARAMETER_HEADER_OFFSET, tvb_length(parameter_tvb), "%s", val_to_str_const(type, parameter_type_values, "Unknown Parameter"));
parameter_tree = proto_item_add_subtree(parameter_item, ett_enrp_parameter);
/* add tag and length to the enrp 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);
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, parameter_tree);
break;
case SCTP_TRANSPORT_PARAMETER_TYPE:
dissect_sctp_transport_parameter(parameter_tvb, parameter_tree);
break;
case TCP_TRANSPORT_PARAMETER_TYPE:
dissect_tcp_transport_parameter(parameter_tvb, parameter_tree);
break;
case UDP_TRANSPORT_PARAMETER_TYPE:
dissect_udp_transport_parameter(parameter_tvb, parameter_tree);
break;
case UDP_LITE_TRANSPORT_PARAMETER_TYPE:
dissect_udp_lite_transport_parameter(parameter_tvb, 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, parameter_tree);
break;
case SERVER_INFORMATION_PARAMETER_TYPE:
dissect_server_information_parameter(parameter_tvb, parameter_tree);
break;
case OPERATION_ERROR_PARAMETER_TYPE:
dissect_operation_error_parameter(parameter_tvb, 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;
default:
dissect_unknown_parameter(parameter_tvb, parameter_tree, parameter_item);
break;
};
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
dissect_parameters(tvbuff_t *parameters_tvb, proto_tree *tree)
{
gint offset, length, total_length, remaining_length;
tvbuff_t *parameter_tvb;
offset = 0;
while((remaining_length = tvb_length_remaining(parameters_tvb, offset)) > 0) {
length = tvb_get_ntohs(parameters_tvb, offset + PARAMETER_LENGTH_OFFSET);
total_length = ADD_PADDING(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(parameters_tvb, offset, total_length, total_length);
dissect_parameter(parameter_tvb, tree);
/* get rid of the handled parameter */
offset += total_length;
}
}
/* Dissectors for messages. This is specific to ENRP */
#define MESSAGE_TYPE_LENGTH 1
#define MESSAGE_FLAGS_LENGTH 1
#define MESSAGE_LENGTH_LENGTH 2
#define MESSAGE_HEADER_LENGTH (MESSAGE_TYPE_LENGTH + MESSAGE_FLAGS_LENGTH + MESSAGE_LENGTH_LENGTH)
#define MESSAGE_TYPE_OFFSET 0
#define MESSAGE_FLAGS_OFFSET (MESSAGE_TYPE_OFFSET + MESSAGE_TYPE_LENGTH)
#define MESSAGE_LENGTH_OFFSET (MESSAGE_FLAGS_OFFSET + MESSAGE_FLAGS_LENGTH)
#define MESSAGE_VALUE_OFFSET (MESSAGE_LENGTH_OFFSET + MESSAGE_LENGTH_LENGTH)
#define SENDER_SERVERS_ID_LENGTH 4
#define RECEIVER_SERVERS_ID_LENGTH 4
#define SENDER_SERVERS_ID_OFFSET MESSAGE_VALUE_OFFSET
#define RECEIVER_SERVERS_ID_OFFSET (SENDER_SERVERS_ID_OFFSET + SENDER_SERVERS_ID_LENGTH)
#define MESSAGE_PARAMETERS_OFFSET (RECEIVER_SERVERS_ID_OFFSET + RECEIVER_SERVERS_ID_LENGTH)
#define REPLY_REQUIRED_BIT_MASK 0x01
static const true_false_string reply_required_bit_value = {
"Reply required",
"Reply not required"
};
static void
dissect_enrp_presence_message(tvbuff_t *message_tvb, proto_tree *message_tree, proto_tree *flags_tree)
{
tvbuff_t *parameters_tvb;
proto_tree_add_item(flags_tree, hf_reply_required_bit, message_tvb, MESSAGE_FLAGS_OFFSET, MESSAGE_FLAGS_LENGTH, ENC_BIG_ENDIAN);
proto_tree_add_item(message_tree, hf_sender_servers_id, message_tvb, SENDER_SERVERS_ID_OFFSET, SENDER_SERVERS_ID_LENGTH, ENC_BIG_ENDIAN);
proto_tree_add_item(message_tree, hf_receiver_servers_id, message_tvb, RECEIVER_SERVERS_ID_OFFSET, RECEIVER_SERVERS_ID_LENGTH, ENC_BIG_ENDIAN);
parameters_tvb = tvb_new_subset_remaining(message_tvb, MESSAGE_PARAMETERS_OFFSET);
dissect_parameters(parameters_tvb, message_tree);
}
#define OWN_CHILDREN_ONLY_BIT_MASK 0x01
static const true_false_string own_children_only_bit_value = {
"Only information for own PEs",
"Information for all PEs"
};
static void
dissect_enrp_handle_table_request_message(tvbuff_t *message_tvb, proto_tree *message_tree, proto_tree *flags_tree)
{
/* FIXME: ensure that the length is 12 bytes. */
proto_tree_add_item(flags_tree, hf_own_children_only_bit, message_tvb, MESSAGE_FLAGS_OFFSET, MESSAGE_FLAGS_LENGTH, ENC_BIG_ENDIAN);
proto_tree_add_item(message_tree, hf_sender_servers_id, message_tvb, SENDER_SERVERS_ID_OFFSET, SENDER_SERVERS_ID_LENGTH, ENC_BIG_ENDIAN);
proto_tree_add_item(message_tree, hf_receiver_servers_id, message_tvb, RECEIVER_SERVERS_ID_OFFSET, RECEIVER_SERVERS_ID_LENGTH, ENC_BIG_ENDIAN);
}
#define REJECT_BIT_MASK 0x01
#define MORE_TO_SEND_BIT_MASK 0x02
static const true_false_string reject_bit_value = {
"Rejected",
"Accepted"
};
static const true_false_string more_to_send_bit_value = {
"More information available",
"All information included"
};
static void
dissect_enrp_handle_table_response_message(tvbuff_t *message_tvb, proto_tree *message_tree, proto_tree *flags_tree)
{
tvbuff_t *parameters_tvb;
proto_tree_add_item(flags_tree, hf_more_to_send_bit, message_tvb, MESSAGE_FLAGS_OFFSET, MESSAGE_FLAGS_LENGTH, ENC_BIG_ENDIAN);
proto_tree_add_item(flags_tree, hf_reject_bit, message_tvb, MESSAGE_FLAGS_OFFSET, MESSAGE_FLAGS_LENGTH, ENC_BIG_ENDIAN);
proto_tree_add_item(message_tree, hf_sender_servers_id, message_tvb, SENDER_SERVERS_ID_OFFSET, SENDER_SERVERS_ID_LENGTH, ENC_BIG_ENDIAN);
proto_tree_add_item(message_tree, hf_receiver_servers_id, message_tvb, RECEIVER_SERVERS_ID_OFFSET, RECEIVER_SERVERS_ID_LENGTH, ENC_BIG_ENDIAN);
parameters_tvb = tvb_new_subset_remaining(message_tvb, MESSAGE_PARAMETERS_OFFSET);
dissect_parameters(parameters_tvb, message_tree);
}
#define UPDATE_ACTION_LENGTH 2
#define PNU_RESERVED_LENGTH 2
#define UPDATE_ACTION_OFFSET (MESSAGE_VALUE_OFFSET + SENDER_SERVERS_ID_LENGTH + RECEIVER_SERVERS_ID_LENGTH)
#define PNU_RESERVED_OFFSET (UPDATE_ACTION_OFFSET + UPDATE_ACTION_LENGTH)
#define PNU_MESSAGE_PARAMETERS_OFFSET (PNU_RESERVED_OFFSET + PNU_RESERVED_LENGTH)
static const value_string update_action_values[] = {
{ 0, "Add pool element" },
{ 1, "Delete pool element" },
{ 0, NULL } };
#define TOS_BIT_MASK 0x01
static const true_false_string tos_bit_value = {
"Takeover suggested",
"Takeover not suggested"
};
static void
dissect_enrp_handle_update_message(tvbuff_t *message_tvb, proto_tree *message_tree, proto_tree *flags_tree _U_)
{
tvbuff_t *parameters_tvb;
proto_tree_add_item(flags_tree, hf_tos_bit, message_tvb, MESSAGE_FLAGS_OFFSET, MESSAGE_FLAGS_LENGTH, ENC_BIG_ENDIAN);
proto_tree_add_item(message_tree, hf_sender_servers_id, message_tvb, SENDER_SERVERS_ID_OFFSET, SENDER_SERVERS_ID_LENGTH, ENC_BIG_ENDIAN);
proto_tree_add_item(message_tree, hf_receiver_servers_id, message_tvb, RECEIVER_SERVERS_ID_OFFSET, RECEIVER_SERVERS_ID_LENGTH, ENC_BIG_ENDIAN);
proto_tree_add_item(message_tree, hf_update_action, message_tvb, UPDATE_ACTION_OFFSET, UPDATE_ACTION_LENGTH, ENC_BIG_ENDIAN);
proto_tree_add_item(message_tree, hf_pmu_reserved, message_tvb, PNU_RESERVED_OFFSET, PNU_RESERVED_LENGTH, ENC_BIG_ENDIAN);
parameters_tvb = tvb_new_subset_remaining(message_tvb, PNU_MESSAGE_PARAMETERS_OFFSET);
dissect_parameters(parameters_tvb, message_tree);
}
static void
dissect_enrp_list_request_message(tvbuff_t *message_tvb, proto_tree *message_tree, proto_tree *flags_tree _U_)
{
/* FIXME: ensure that the length is 12 bytes. */
proto_tree_add_item(message_tree, hf_sender_servers_id, message_tvb, SENDER_SERVERS_ID_OFFSET, SENDER_SERVERS_ID_LENGTH, ENC_BIG_ENDIAN);
proto_tree_add_item(message_tree, hf_receiver_servers_id, message_tvb, RECEIVER_SERVERS_ID_OFFSET, RECEIVER_SERVERS_ID_LENGTH, ENC_BIG_ENDIAN);
}
static void
dissect_enrp_list_response_message(tvbuff_t *message_tvb, proto_tree *message_tree, proto_tree *flags_tree)
{
tvbuff_t *parameters_tvb;
proto_tree_add_item(flags_tree, hf_reject_bit, message_tvb, MESSAGE_FLAGS_OFFSET, MESSAGE_FLAGS_LENGTH, ENC_BIG_ENDIAN);
proto_tree_add_item(message_tree, hf_sender_servers_id, message_tvb, SENDER_SERVERS_ID_OFFSET, SENDER_SERVERS_ID_LENGTH, ENC_BIG_ENDIAN);
proto_tree_add_item(message_tree, hf_receiver_servers_id, message_tvb, RECEIVER_SERVERS_ID_OFFSET, RECEIVER_SERVERS_ID_LENGTH, ENC_BIG_ENDIAN);
parameters_tvb = tvb_new_subset_remaining(message_tvb, MESSAGE_PARAMETERS_OFFSET);
dissect_parameters(parameters_tvb, message_tree);
}
#define TARGET_SERVERS_ID_LENGTH 4
#define TARGET_SERVERS_ID_OFFSET (RECEIVER_SERVERS_ID_OFFSET + RECEIVER_SERVERS_ID_LENGTH)
static void
dissect_enrp_init_takeover_message(tvbuff_t *message_tvb, proto_tree *message_tree, proto_tree *flags_tree _U_)
{
/* FIXME: ensure that the length is 16 bytes. */
proto_tree_add_item(message_tree, hf_sender_servers_id, message_tvb, SENDER_SERVERS_ID_OFFSET, SENDER_SERVERS_ID_LENGTH, ENC_BIG_ENDIAN);
proto_tree_add_item(message_tree, hf_receiver_servers_id, message_tvb, RECEIVER_SERVERS_ID_OFFSET, RECEIVER_SERVERS_ID_LENGTH, ENC_BIG_ENDIAN);
proto_tree_add_item(message_tree, hf_target_servers_id, message_tvb, TARGET_SERVERS_ID_OFFSET, TARGET_SERVERS_ID_LENGTH, ENC_BIG_ENDIAN);
}
static void
dissect_enrp_init_takeover_ack_message(tvbuff_t *message_tvb, proto_tree *message_tree, proto_tree *flags_tree _U_)
{
/* FIXME: ensure that the length is 16 bytes. */
proto_tree_add_item(message_tree, hf_sender_servers_id, message_tvb, SENDER_SERVERS_ID_OFFSET, SENDER_SERVERS_ID_LENGTH, ENC_BIG_ENDIAN);
proto_tree_add_item(message_tree, hf_receiver_servers_id, message_tvb, RECEIVER_SERVERS_ID_OFFSET, RECEIVER_SERVERS_ID_LENGTH, ENC_BIG_ENDIAN);
proto_tree_add_item(message_tree, hf_target_servers_id, message_tvb, TARGET_SERVERS_ID_OFFSET, TARGET_SERVERS_ID_LENGTH, ENC_BIG_ENDIAN);
}
static void
dissect_enrp_init_takeover_server_message(tvbuff_t *message_tvb, proto_tree *message_tree, proto_tree *flags_tree _U_)
{
/* FIXME: ensure that the length is 16 bytes. */
proto_tree_add_item(message_tree, hf_sender_servers_id, message_tvb, SENDER_SERVERS_ID_OFFSET, SENDER_SERVERS_ID_LENGTH, ENC_BIG_ENDIAN);
proto_tree_add_item(message_tree, hf_receiver_servers_id, message_tvb, RECEIVER_SERVERS_ID_OFFSET, RECEIVER_SERVERS_ID_LENGTH, ENC_BIG_ENDIAN);
proto_tree_add_item(message_tree, hf_target_servers_id, message_tvb, TARGET_SERVERS_ID_OFFSET, TARGET_SERVERS_ID_LENGTH, ENC_BIG_ENDIAN);
}
static void
dissect_enrp_error_message(tvbuff_t *message_tvb, proto_tree *message_tree, proto_tree *flags_tree _U_)
{
tvbuff_t *parameters_tvb;
proto_tree_add_item(message_tree, hf_sender_servers_id, message_tvb, SENDER_SERVERS_ID_OFFSET, SENDER_SERVERS_ID_LENGTH, ENC_BIG_ENDIAN);
proto_tree_add_item(message_tree, hf_receiver_servers_id, message_tvb, RECEIVER_SERVERS_ID_OFFSET, RECEIVER_SERVERS_ID_LENGTH, ENC_BIG_ENDIAN);
parameters_tvb = tvb_new_subset_remaining(message_tvb, MESSAGE_PARAMETERS_OFFSET);
dissect_parameters(parameters_tvb, message_tree);
}
static void
dissect_unknown_message(tvbuff_t *message_tvb, proto_tree *message_tree, proto_tree *flags_tree _U_)
{
proto_tree_add_item(message_tree, hf_message_value, message_tvb, MESSAGE_VALUE_OFFSET, tvb_length(message_tvb) - MESSAGE_HEADER_LENGTH, ENC_NA);
}
#define ENRP_PRESENCE_MESSAGE_TYPE 0x01
#define ENRP_HANDLE_TABLE_REQUEST_MESSAGE_TYPE 0x02
#define ENRP_HANDLE_TABLE_RESPONSE_MESSAGE_TYPE 0x03
#define ENRP_HANDLE_UPDATE_MESSAGE_TYPE 0x04
#define ENRP_LIST_REQUEST_MESSAGE_TYPE 0x05
#define ENRP_LIST_RESPONSE_MESSAGE_TYPE 0x06
#define ENRP_INIT_TAKEOVER_MESSAGE_TYPE 0x07
#define ENRP_INIT_TAKEOVER_ACK_MESSAGE_TYPE 0x08
#define ENRP_TAKEOVER_SERVER_MESSAGE_TYPE 0x09
#define ENRP_ERROR_MESSAGE_TYPE 0x0a
static const value_string message_type_values[] = {
{ ENRP_PRESENCE_MESSAGE_TYPE, "ENRP Presence" },
{ ENRP_HANDLE_TABLE_REQUEST_MESSAGE_TYPE, "ENRP Handle Table Request" },
{ ENRP_HANDLE_TABLE_RESPONSE_MESSAGE_TYPE, "ENRP Handle Table Response" },
{ ENRP_HANDLE_UPDATE_MESSAGE_TYPE, "ENRP Handle Update" },
{ ENRP_LIST_REQUEST_MESSAGE_TYPE, "ENRP List Request" },
{ ENRP_LIST_RESPONSE_MESSAGE_TYPE, "ENRP List Response" },
{ ENRP_INIT_TAKEOVER_MESSAGE_TYPE, "ENRP Init Takeover" },
{ ENRP_INIT_TAKEOVER_ACK_MESSAGE_TYPE, "ENRP Init Takeover Ack" },
{ ENRP_TAKEOVER_SERVER_MESSAGE_TYPE, "ENRP Takeover Server" },
{ ENRP_ERROR_MESSAGE_TYPE, "ENRP Error" },
{ 0, NULL } };
static void
dissect_enrp_message(tvbuff_t *message_tvb, packet_info *pinfo, proto_tree *enrp_tree)
{
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_enrp_message is called via dissect_error_cause */
if (pinfo)
col_add_fstr(pinfo->cinfo, COL_INFO, "%s ", val_to_str_const(type, message_type_values, "Unknown ENRP Type"));
if (enrp_tree) {
proto_tree_add_item(enrp_tree, hf_message_type, message_tvb, MESSAGE_TYPE_OFFSET, MESSAGE_TYPE_LENGTH, ENC_BIG_ENDIAN);
flags_item = proto_tree_add_item(enrp_tree, hf_message_flags, message_tvb, MESSAGE_FLAGS_OFFSET, MESSAGE_FLAGS_LENGTH, ENC_BIG_ENDIAN);
flags_tree = proto_item_add_subtree(flags_item, ett_enrp_flags);
proto_tree_add_item(enrp_tree, hf_message_length, message_tvb, MESSAGE_LENGTH_OFFSET, MESSAGE_LENGTH_LENGTH, ENC_BIG_ENDIAN);
switch (type) {
case ENRP_PRESENCE_MESSAGE_TYPE:
dissect_enrp_presence_message(message_tvb, enrp_tree, flags_tree);
break;
case ENRP_HANDLE_TABLE_REQUEST_MESSAGE_TYPE:
dissect_enrp_handle_table_request_message(message_tvb, enrp_tree, flags_tree);
break;
case ENRP_HANDLE_TABLE_RESPONSE_MESSAGE_TYPE:
dissect_enrp_handle_table_response_message(message_tvb, enrp_tree, flags_tree);
break;
case ENRP_HANDLE_UPDATE_MESSAGE_TYPE:
dissect_enrp_handle_update_message(message_tvb, enrp_tree, flags_tree);
break;
case ENRP_LIST_REQUEST_MESSAGE_TYPE:
dissect_enrp_list_request_message(message_tvb, enrp_tree, flags_tree);
break;
case ENRP_LIST_RESPONSE_MESSAGE_TYPE:
dissect_enrp_list_response_message(message_tvb, enrp_tree, flags_tree);
break;
case ENRP_INIT_TAKEOVER_MESSAGE_TYPE:
dissect_enrp_init_takeover_message(message_tvb, enrp_tree, flags_tree);
break;
case ENRP_INIT_TAKEOVER_ACK_MESSAGE_TYPE:
dissect_enrp_init_takeover_ack_message(message_tvb, enrp_tree, flags_tree);
break;
case ENRP_TAKEOVER_SERVER_MESSAGE_TYPE:
dissect_enrp_init_takeover_server_message(message_tvb, enrp_tree, flags_tree);
break;
case ENRP_ERROR_MESSAGE_TYPE:
dissect_enrp_error_message(message_tvb, enrp_tree, flags_tree);
break;
default:
dissect_unknown_message(message_tvb, enrp_tree, flags_tree);
break;
}
}
}
static void
dissect_enrp(tvbuff_t *message_tvb, packet_info *pinfo, proto_tree *tree)
{
proto_item *enrp_item;
proto_tree *enrp_tree;
/* pinfo is NULL only if dissect_enrp is called from dissect_error_cause */
if (pinfo)
col_set_str(pinfo->cinfo, COL_PROTOCOL, "ENRP");
/* In the interest of speed, if "tree" is NULL, don't do any work not
necessary to generate protocol tree items. */
if (tree) {
/* create the enrp protocol tree */
enrp_item = proto_tree_add_item(tree, proto_enrp, message_tvb, 0, -1, ENC_NA);
enrp_tree = proto_item_add_subtree(enrp_item, ett_enrp);
} else {
enrp_tree = NULL;
};
/* dissect the message */
dissect_enrp_message(message_tvb, pinfo, enrp_tree);
}
/* Register the protocol with Wireshark */
void
proto_register_enrp(void)
{
/* Setup list of header fields */
static hf_register_info hf[] = {
{ &hf_message_type, { "Type", "enrp.message_type", FT_UINT8, BASE_DEC, VALS(message_type_values), 0x0, NULL, HFILL } },
{ &hf_message_flags, { "Flags", "enrp.message_flags", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL } },
{ &hf_message_length, { "Length", "enrp.message_length", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } },
{ &hf_message_value, { "Value", "enrp.message_value", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL } },
{ &hf_cause_code, { "Cause Code", "enrp.cause_code", FT_UINT16, BASE_HEX, VALS(cause_code_values), 0x0, NULL, HFILL } },
{ &hf_cause_length, { "Cause Length", "enrp.cause_length", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } },
{ &hf_cause_info, { "Cause Info", "enrp.cause_info", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL } },
{ &hf_cause_padding, { "Padding", "enrp.cause_padding", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL } },
{ &hf_parameter_type, { "Parameter Type", "enrp.parameter_type", FT_UINT16, BASE_HEX, VALS(parameter_type_values), 0x0, NULL, HFILL } },
{ &hf_parameter_length, { "Parameter Length", "enrp.parameter_length", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } },
{ &hf_parameter_value, { "Parameter Value", "enrp.parameter_value", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL } },
{ &hf_parameter_padding, { "Padding", "enrp.parameter_padding", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL } },
{ &hf_parameter_ipv4_address, { "IP Version 4 Address", "enrp.ipv4_address", FT_IPv4, BASE_NONE, NULL, 0x0, NULL, HFILL } },
{ &hf_parameter_ipv6_address, { "IP Version 6 Address", "enrp.ipv6_address", FT_IPv6, BASE_NONE, NULL, 0x0, NULL, HFILL } },
{ &hf_dccp_port, { "Port", "enrp.dccp_transport_port", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } },
{ &hf_dccp_reserved, { "Reserved", "enrp.dccp_transport_reserved", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } },
{ &hf_dccp_service_code, { "Service Code", "enrp.dccp_transport_service_code", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } },
{ &hf_sctp_port, { "Port", "enrp.sctp_transport_port", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } },
{ &hf_transport_use, { "Transport Use", "enrp.transport_use", FT_UINT16, BASE_DEC, VALS(transport_use_values), 0x0, NULL, HFILL } },
{ &hf_tcp_port, { "Port", "enrp.tcp_transport_port", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } },
{ &hf_udp_port, { "Port", "enrp.udp_transport_port", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } },
{ &hf_udp_reserved, { "Reserved", "enrp.udp_transport_reserved", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } },
{ &hf_udp_lite_port, { "Port", "enrp.udp_lite_transport_port", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } },
{ &hf_udp_lite_reserved, { "Reserved", "enrp.udp_lite_transport_reserved", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } },
{ &hf_policy_type, { "Policy Type", "enrp.pool_member_selection_policy_type", FT_UINT32, BASE_HEX, VALS(policy_type_values), 0x0, NULL, HFILL } },
{ &hf_policy_weight, { "Policy Weight", "enrp.pool_member_selection_policy_weight", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } },
{ &hf_policy_priority, { "Policy Priority", "enrp.pool_member_selection_policy_priority", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } },
{ &hf_policy_load, { "Policy Load", "enrp.pool_member_selection_policy_load", FT_DOUBLE, BASE_NONE, NULL, 0x0, NULL, HFILL } },
{ &hf_policy_degradation, { "Policy Degradation", "enrp.pool_member_selection_policy_degradation", FT_DOUBLE, BASE_NONE, NULL, 0x0, NULL, HFILL } },
{ &hf_policy_loaddpf, { "Policy Load DPF", "enrp.pool_member_selection_policy_load_dpf", FT_DOUBLE, BASE_NONE, NULL, 0x0, NULL, HFILL } },
{ &hf_policy_weightdpf, { "Policy Weight DPF", "enrp.pool_member_selection_policy_weight_dpf", FT_DOUBLE, BASE_NONE, NULL, 0x0, NULL, HFILL } },
{ &hf_policy_distance, { "Policy Distance", "enrp.pool_member_selection_policy_distance", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } },
{ &hf_policy_value, { "Policy Value", "enrp.pool_member_selection_policy_value", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL } },
{ &hf_pool_handle, { "Pool Handle", "enrp.pool_handle_pool_handle", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL } },
{ &hf_pe_pe_identifier, { "PE Identifier", "enrp.pool_element_pe_identifier", FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL } },
{ &hf_home_enrp_id, { "Home ENRP Server Identifier", "enrp.pool_element_home_enrp_server_identifier", FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL } },
{ &hf_reg_life, { "Registration Life", "enrp.pool_element_registration_life", FT_INT32, BASE_DEC, NULL, 0x0, NULL, HFILL } },
{ &hf_server_identifier, { "Server Identifier", "enrp.server_information_server_identifier", FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL } },
{ &hf_cookie, { "Cookie", "enrp.cookie", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL } },
{ &hf_pe_identifier, { "PE Identifier", "enrp.pe_identifier", FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL } },
{ &hf_pe_checksum, { "PE Checksum", "enrp.pe_checksum", FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL } },
{ &hf_sender_servers_id, { "Sender Server's ID", "enrp.sender_servers_id", FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL } },
{ &hf_receiver_servers_id, { "Receiver Server's ID", "enrp.receiver_servers_id", FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL } },
{ &hf_target_servers_id, { "Target Server's ID", "enrp.target_servers_id", FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL } },
{ &hf_update_action, { "Update Action", "enrp.update_action", FT_UINT16, BASE_DEC, VALS(update_action_values), 0x0, NULL, HFILL } },
{ &hf_pmu_reserved, { "Reserved", "enrp.reserved", FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL } },
{ &hf_reply_required_bit, { "R Bit", "enrp.r_bit", FT_BOOLEAN, 8, TFS(&reply_required_bit_value), REPLY_REQUIRED_BIT_MASK, NULL, HFILL } },
{ &hf_own_children_only_bit, { "W Bit", "enrp.w_bit", FT_BOOLEAN, 8, TFS(&own_children_only_bit_value), OWN_CHILDREN_ONLY_BIT_MASK, NULL, HFILL } },
{ &hf_more_to_send_bit, { "M Bit", "enrp.m_bit", FT_BOOLEAN, 8, TFS(&more_to_send_bit_value), MORE_TO_SEND_BIT_MASK, NULL, HFILL } },
{ &hf_reject_bit, { "R Bit", "enrp.r_bit", FT_BOOLEAN, 8, TFS(&reject_bit_value), REJECT_BIT_MASK, NULL, HFILL } },
{ &hf_tos_bit, { "T Bit", "enrp.t_bit", FT_BOOLEAN, 8, TFS(&tos_bit_value), TOS_BIT_MASK, NULL, HFILL } },
};
/* Setup protocol subtree array */
static gint *ett[] = {
&ett_enrp,
&ett_enrp_parameter,
&ett_enrp_cause,
&ett_enrp_flags,
};
/* Register the protocol name and description */
proto_enrp = proto_register_protocol("Endpoint Handlespace Redundancy Protocol", "ENRP", "enrp");
/* Required function calls to register the header fields and subtrees used */
proto_register_field_array(proto_enrp, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
}
void
proto_reg_handoff_enrp(void)
{
dissector_handle_t enrp_handle;
enrp_handle = create_dissector_handle(dissect_enrp, proto_enrp);
dissector_add_uint("sctp.ppi", ENRP_PAYLOAD_PROTOCOL_ID, enrp_handle);
dissector_add_uint("sctp.port", ENRP_SCTP_PORT, enrp_handle);
dissector_add_uint("udp.port", ENRP_UDP_PORT, enrp_handle);
}
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