/* 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 * Copyright 2008 Thomas Dreibholz * * Wireshark - Network traffic analyzer * By Gerald Combs * 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 #include #include #include 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 int dissect_enrp(tvbuff_t *, packet_info *, proto_tree *, void*); #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_captured_length(cause_tvb) - length; cause_tree = proto_tree_add_subtree(parameter_tree, cause_tvb, CAUSE_HEADER_OFFSET, -1, ett_enrp_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, 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, NULL); 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_length(error_causes_tvb, offset, 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_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; } } #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; 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(parameter_tvb, POOL_HANDLE_OFFSET, handle_length) ); } #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_tree *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_captured_length(parameter_tvb) - length; /* create proto_tree stuff */ parameter_tree = proto_tree_add_subtree(enrp_tree, parameter_tvb, PARAMETER_HEADER_OFFSET, -1, ett_enrp_parameter, ¶meter_item, val_to_str_const(type, parameter_type_values, "Unknown 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_reported_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_length(parameters_tvb, offset, 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) { 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_captured_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 int dissect_enrp(tvbuff_t *message_tvb, packet_info *pinfo, proto_tree *tree, void* data _U_) { 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"); /* 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); /* dissect the message */ dissect_enrp_message(message_tvb, pinfo, enrp_tree); return tvb_captured_length(message_tvb); } /* 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); } /* * Editor modelines - http://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: */