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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-10 20:34:10 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-10 20:34:10 +0000 |
commit | e4ba6dbc3f1e76890b22773807ea37fe8fa2b1bc (patch) | |
tree | 68cb5ef9081156392f1dd62a00c6ccc1451b93df /epan/dissectors/packet-enrp.c | |
parent | Initial commit. (diff) | |
download | wireshark-e4ba6dbc3f1e76890b22773807ea37fe8fa2b1bc.tar.xz wireshark-e4ba6dbc3f1e76890b22773807ea37fe8fa2b1bc.zip |
Adding upstream version 4.2.2.upstream/4.2.2
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'epan/dissectors/packet-enrp.c')
-rw-r--r-- | epan/dissectors/packet-enrp.c | 1171 |
1 files changed, 1171 insertions, 0 deletions
diff --git a/epan/dissectors/packet-enrp.c b/epan/dissectors/packet-enrp.c new file mode 100644 index 00000000..2611e12a --- /dev/null +++ b/epan/dissectors/packet-enrp.c @@ -0,0 +1,1171 @@ +/* packet-enrp.c + * Routines for Endpoint Handlespace Redundancy Protocol (ENRP) + * It is hopefully (needs testing) compliant to + * RFC 5353 + * RFC 5354 + * RFC 5356 + * https://tools.ietf.org/html/draft-dreibholz-rserpool-enrp-takeover-21 + * + * Copyright 2008-2021 Thomas Dreibholz <dreibh [AT] iem.uni-due.de> + * Copyright 2004-2007 Michael Tüxen <tuexen [AT] fh-muenster.de> + * + * Wireshark - Network traffic analyzer + * By Gerald Combs <gerald@wireshark.org> + * Copyright 1998 Gerald Combs + * + * Copied from README.developer + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +#include "config.h" + +#include <epan/packet.h> +#include <epan/to_str.h> +#include <epan/sctpppids.h> +#include <epan/stat_tap_ui.h> +#include <epan/expert.h> +#include <epan/proto_data.h> + +#include <wsutil/str_util.h> +#include <wsutil/ws_roundup.h> + +#include "packet-asap+enrp-common.h" + +void proto_register_enrp(void); +void proto_reg_handoff_enrp(void); + +static dissector_handle_t enrp_handle; + +/* Initialize the protocol and registered fields */ +static int enrp_tap = -1; +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 guint64 enrp_total_msgs = 0; +static guint64 enrp_total_bytes = 0; + +static expert_field ei_enrp_max_recursion_depth_reached = EI_INIT; + +static void +dissect_parameters(tvbuff_t *, packet_info *, proto_tree *); +static void +dissect_parameter(tvbuff_t *, packet_info *, proto_tree *); +static void +dissect_enrp_main(tvbuff_t *, packet_info *, proto_tree *); +static int +dissect_enrp(tvbuff_t *, packet_info *, proto_tree *, void*); + +#define ENRP_UDP_PORT 9901 +#define ENRP_SCTP_PORT 9901 + +typedef struct _enrp_tap_rec_t { + guint8 type; + guint16 size; + const char* type_string; +} enrp_tap_rec_t; + +/* Dissectors for error causes. This is common for ASAP and ENRP. */ + +static void +dissect_unknown_cause(tvbuff_t *cause_tvb, proto_tree *cause_tree, proto_item *cause_item) +{ + guint16 code, length, cause_info_length; + + code = tvb_get_ntohs(cause_tvb, CAUSE_CODE_OFFSET); + length = tvb_get_ntohs(cause_tvb, CAUSE_LENGTH_OFFSET); + cause_info_length = length - CAUSE_HEADER_LENGTH; + if (cause_info_length > 0) + proto_tree_add_item(cause_tree, hf_cause_info, cause_tvb, CAUSE_INFO_OFFSET, cause_info_length, ENC_NA); + proto_item_append_text(cause_item, " (code %u and %u byte%s information)", code, cause_info_length, plurality(cause_info_length, "", "s")); +} + +static void +dissect_error_cause(tvbuff_t *cause_tvb, packet_info *pinfo, proto_tree *parameter_tree) +{ + guint16 code, length, padding_length; + proto_item *cause_item; + proto_tree *cause_tree; + tvbuff_t *parameter_tvb, *message_tvb; + + 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, pinfo, cause_tree); + break; + case UNRECONGNIZED_MESSAGE_CAUSE_CODE: + message_tvb = tvb_new_subset_remaining(cause_tvb, CAUSE_INFO_OFFSET); + dissect_enrp_main(message_tvb, pinfo, cause_tree); + break; + case INVALID_VALUES: + parameter_tvb = tvb_new_subset_remaining(cause_tvb, CAUSE_INFO_OFFSET); + dissect_parameter(parameter_tvb, pinfo, cause_tree); + break; + case NON_UNIQUE_PE_IDENTIFIER: + break; + case POOLING_POLICY_INCONSISTENT_CAUSE_CODE: + parameter_tvb = tvb_new_subset_remaining(cause_tvb, CAUSE_INFO_OFFSET); + dissect_parameter(parameter_tvb, pinfo, cause_tree); + break; + case LACK_OF_RESOURCES_CAUSE_CODE: + break; + case INCONSISTENT_TRANSPORT_TYPE_CAUSE_CODE: + parameter_tvb = tvb_new_subset_remaining(cause_tvb, CAUSE_INFO_OFFSET); + dissect_parameter(parameter_tvb, pinfo, cause_tree); + break; + case INCONSISTENT_DATA_CONTROL_CONFIGURATION_CAUSE_CODE: + break; + case UNKNOWN_POOL_HANDLE: + break; + case REJECTION_DUE_TO_SECURITY_CAUSE_CODE: + break; + default: + dissect_unknown_cause(cause_tvb, cause_tree, cause_item); + break; + } + if (padding_length > 0) + proto_tree_add_item(cause_tree, hf_cause_padding, cause_tvb, CAUSE_HEADER_OFFSET + length, padding_length, ENC_NA); +} + +static void +dissect_error_causes(tvbuff_t *error_causes_tvb, packet_info *pinfo, proto_tree *parameter_tree) +{ + guint16 length, total_length; + gint offset; + tvbuff_t *error_cause_tvb; + + offset = 0; + while(tvb_reported_length_remaining(error_causes_tvb, offset) > 0) { + length = tvb_get_ntohs(error_causes_tvb, offset + CAUSE_LENGTH_OFFSET); + total_length = WS_ROUNDUP_4(length); + error_cause_tvb = tvb_new_subset_length(error_causes_tvb, offset, total_length); + dissect_error_cause(error_cause_tvb, pinfo, parameter_tree); + offset += total_length; + } +} + +/* Dissectors for parameters. This is common for ASAP and ENRP. */ + +static void +dissect_ipv4_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, 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(pinfo->pool, parameter_tvb, IPV4_ADDRESS_OFFSET)); +} + +static void +dissect_ipv6_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, 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(pinfo->pool, parameter_tvb, IPV6_ADDRESS_OFFSET)); +} + +static void +dissect_dccp_transport_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *parameter_tree) +{ + tvbuff_t *parameters_tvb; + + proto_tree_add_item(parameter_tree, hf_dccp_port, parameter_tvb, DCCP_PORT_OFFSET, DCCP_PORT_LENGTH, ENC_BIG_ENDIAN); + proto_tree_add_item(parameter_tree, hf_dccp_reserved, parameter_tvb, DCCP_RESERVED_OFFSET, DCCP_RESERVED_LENGTH, ENC_BIG_ENDIAN); + proto_tree_add_item(parameter_tree, hf_dccp_service_code, parameter_tvb, DCCP_SERVICE_CODE_OFFSET, DCCP_SERVICE_CODE_LENGTH, ENC_BIG_ENDIAN); + + parameters_tvb = tvb_new_subset_remaining(parameter_tvb, DCCP_ADDRESS_OFFSET); + dissect_parameters(parameters_tvb, pinfo, parameter_tree); +} + +static void +dissect_sctp_transport_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *parameter_tree) +{ + tvbuff_t *parameters_tvb; + + proto_tree_add_item(parameter_tree, hf_sctp_port, parameter_tvb, SCTP_PORT_OFFSET, SCTP_PORT_LENGTH, ENC_BIG_ENDIAN); + proto_tree_add_item(parameter_tree, hf_transport_use, parameter_tvb, SCTP_TRANSPORT_USE_OFFSET, SCTP_TRANSPORT_USE_LENGTH, ENC_BIG_ENDIAN); + + parameters_tvb = tvb_new_subset_remaining(parameter_tvb, SCTP_ADDRESS_OFFSET); + dissect_parameters(parameters_tvb, pinfo, parameter_tree); +} + +static void +dissect_tcp_transport_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *parameter_tree) +{ + tvbuff_t *parameters_tvb; + + proto_tree_add_item(parameter_tree, hf_tcp_port, parameter_tvb, TCP_PORT_OFFSET, TCP_PORT_LENGTH, ENC_BIG_ENDIAN); + proto_tree_add_item(parameter_tree, hf_transport_use, parameter_tvb, TCP_TRANSPORT_USE_OFFSET, TCP_TRANSPORT_USE_LENGTH, ENC_BIG_ENDIAN); + + parameters_tvb = tvb_new_subset_remaining(parameter_tvb, TCP_ADDRESS_OFFSET); + dissect_parameters(parameters_tvb, pinfo, parameter_tree); +} + +static void +dissect_udp_transport_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *parameter_tree) +{ + tvbuff_t *parameters_tvb; + + proto_tree_add_item(parameter_tree, hf_udp_port, parameter_tvb, UDP_PORT_OFFSET, UDP_PORT_LENGTH, ENC_BIG_ENDIAN); + proto_tree_add_item(parameter_tree, hf_udp_reserved, parameter_tvb, UDP_RESERVED_OFFSET, UDP_RESERVED_LENGTH, ENC_BIG_ENDIAN); + + parameters_tvb = tvb_new_subset_remaining(parameter_tvb, UDP_ADDRESS_OFFSET); + dissect_parameters(parameters_tvb, pinfo, parameter_tree); +} + +static void +dissect_udp_lite_transport_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *parameter_tree) +{ + tvbuff_t *parameters_tvb; + + proto_tree_add_item(parameter_tree, hf_udp_lite_port, parameter_tvb, UDP_LITE_PORT_OFFSET, UDP_LITE_PORT_LENGTH, ENC_BIG_ENDIAN); + proto_tree_add_item(parameter_tree, hf_udp_lite_reserved, parameter_tvb, UDP_LITE_RESERVED_OFFSET, UDP_LITE_RESERVED_LENGTH, ENC_BIG_ENDIAN); + + parameters_tvb = tvb_new_subset_remaining(parameter_tvb, UDP_LITE_ADDRESS_OFFSET); + dissect_parameters(parameters_tvb, pinfo, parameter_tree); +} + +static void +dissect_pool_member_selection_policy_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree) +{ + guint32 type; + guint length; + + proto_tree_add_item(parameter_tree, hf_policy_type, parameter_tvb, POLICY_TYPE_OFFSET, POLICY_TYPE_LENGTH, ENC_BIG_ENDIAN); + type = tvb_get_ntohl(parameter_tvb, POLICY_TYPE_OFFSET); + switch (type) { + case RANDOM_POLICY: + case ROUND_ROBIN_POLICY: + break; + case WEIGHTED_RANDOM_POLICY: + case WEIGHTED_ROUND_ROBIN_POLICY: + proto_tree_add_item(parameter_tree, hf_policy_weight, parameter_tvb, POLICY_WEIGHT_OFFSET, POLICY_WEIGHT_LENGTH, ENC_BIG_ENDIAN); + break; + case PRIORITY_POLICY: + proto_tree_add_item(parameter_tree, hf_policy_priority, parameter_tvb, POLICY_PRIORITY_OFFSET, POLICY_PRIORITY_LENGTH, ENC_BIG_ENDIAN); + break; + case LEAST_USED_POLICY: + case RANDOMIZED_LEAST_USED_POLICY: + proto_tree_add_double_format_value(parameter_tree, hf_policy_load, parameter_tvb, POLICY_LOAD_OFFSET, POLICY_LOAD_LENGTH, + 100.0 * tvb_get_ntohl(parameter_tvb, POLICY_LOAD_OFFSET) / (double)0xffffffff, "%1.2f%%", + 100.0 * tvb_get_ntohl(parameter_tvb, POLICY_LOAD_OFFSET) / (double)0xffffffff); + break; + case LEAST_USED_WITH_DEG_POLICY: + case PRIORITY_LEAST_USED_POLICY: + proto_tree_add_double_format_value(parameter_tree, hf_policy_load, parameter_tvb, POLICY_LOAD_OFFSET, POLICY_LOAD_LENGTH, + 100.0 * tvb_get_ntohl(parameter_tvb, POLICY_LOAD_OFFSET) / (double)0xffffffff, "%1.2f%%", + 100.0 * tvb_get_ntohl(parameter_tvb, POLICY_LOAD_OFFSET) / (double)0xffffffff); + proto_tree_add_double_format_value(parameter_tree, hf_policy_degradation, parameter_tvb, POLICY_DEGRADATION_OFFSET, POLICY_DEGRADATION_LENGTH, + 100.0 * tvb_get_ntohl(parameter_tvb, POLICY_DEGRADATION_OFFSET) / (double)0xffffffff, "%1.2f%%", + 100.0 * tvb_get_ntohl(parameter_tvb, POLICY_DEGRADATION_OFFSET) / (double)0xffffffff); + break; + case LEAST_USED_DPF_POLICY: + proto_tree_add_double_format_value(parameter_tree, hf_policy_load, parameter_tvb, POLICY_LOAD_OFFSET, POLICY_LOAD_LENGTH, + 100.0 * tvb_get_ntohl(parameter_tvb, POLICY_LOAD_OFFSET) / (double)0xffffffff, "%1.2f%%", + 100.0 * tvb_get_ntohl(parameter_tvb, POLICY_LOAD_OFFSET) / (double)0xffffffff); + proto_tree_add_double_format_value(parameter_tree, hf_policy_loaddpf, parameter_tvb, POLICY_LUDPF_LOADDPF_OFFSET, POLICY_LUDPF_LOADDPF_LENGTH, + tvb_get_ntohl(parameter_tvb, POLICY_LUDPF_LOADDPF_OFFSET) / (double)0xffffffff, "%1.5f", + tvb_get_ntohl(parameter_tvb, POLICY_LUDPF_LOADDPF_OFFSET) / (double)0xffffffff); + proto_tree_add_item(parameter_tree, hf_policy_distance, parameter_tvb, POLICY_LUDPF_DISTANCE_OFFSET, POLICY_LUDPF_DISTANCE_LENGTH, ENC_BIG_ENDIAN); + break; + case WEIGHTED_RANDOM_DPF_POLICY: + proto_tree_add_item(parameter_tree, hf_policy_weight, parameter_tvb, POLICY_WEIGHT_OFFSET, POLICY_WEIGHT_LENGTH, ENC_BIG_ENDIAN); + proto_tree_add_double_format_value(parameter_tree, hf_policy_weightdpf, parameter_tvb, POLICY_WRANDDPF_WEIGHTDPF_OFFSET, POLICY_WRANDDPF_WEIGHTDPF_LENGTH, + tvb_get_ntohl(parameter_tvb, POLICY_WRANDDPF_WEIGHTDPF_OFFSET) / (double)0xffffffff, "%1.5f", + tvb_get_ntohl(parameter_tvb, POLICY_WRANDDPF_WEIGHTDPF_OFFSET) / (double)0xffffffff); + proto_tree_add_item(parameter_tree, hf_policy_distance, parameter_tvb, POLICY_WRANDDPF_DISTANCE_OFFSET, POLICY_WRANDDPF_DISTANCE_LENGTH, ENC_BIG_ENDIAN); + break; + default: + length = tvb_reported_length(parameter_tvb) - POLICY_VALUE_OFFSET; + if (length > 0) { + proto_tree_add_item(parameter_tree, hf_policy_value, parameter_tvb, POLICY_VALUE_OFFSET, length, ENC_NA); + } + break; + } +} + +static void +dissect_pool_handle_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, 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(pinfo->pool, parameter_tvb, POOL_HANDLE_OFFSET, handle_length) ); +} + +static void +dissect_pool_element_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *parameter_tree) +{ + tvbuff_t* parameters_tvb; + + proto_tree_add_item(parameter_tree, hf_pe_pe_identifier, parameter_tvb, PE_PE_IDENTIFIER_OFFSET, PE_PE_IDENTIFIER_LENGTH, ENC_BIG_ENDIAN); + proto_tree_add_item(parameter_tree, hf_home_enrp_id, parameter_tvb, HOME_ENRP_INDENTIFIER_OFFSET, HOME_ENRP_INDENTIFIER_LENGTH, ENC_BIG_ENDIAN); + proto_tree_add_item(parameter_tree, hf_reg_life, parameter_tvb, REGISTRATION_LIFE_OFFSET, REGISTRATION_LIFE_LENGTH, ENC_BIG_ENDIAN); + + parameters_tvb = tvb_new_subset_remaining(parameter_tvb, USER_TRANSPORT_PARAMETER_OFFSET); + dissect_parameters(parameters_tvb, pinfo, parameter_tree); +} + +static void +dissect_server_information_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *parameter_tree) +{ + tvbuff_t *parameters_tvb; + + proto_tree_add_item(parameter_tree, hf_server_identifier, parameter_tvb, SERVER_ID_OFFSET, SERVER_ID_LENGTH, ENC_BIG_ENDIAN); + + parameters_tvb = tvb_new_subset_remaining(parameter_tvb, SERVER_TRANSPORT_OFFSET); + dissect_parameters(parameters_tvb, pinfo, parameter_tree); +} + +static void +dissect_operation_error_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *parameter_tree) +{ + tvbuff_t *error_causes_tvb; + + error_causes_tvb = tvb_new_subset_remaining(parameter_tvb, ERROR_CAUSES_OFFSET); + dissect_error_causes(error_causes_tvb, pinfo, parameter_tree); +} + +static void +dissect_cookie_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item) +{ + guint16 cookie_length; + + cookie_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH; + if (cookie_length > 0) + proto_tree_add_item(parameter_tree, hf_cookie, parameter_tvb, COOKIE_OFFSET, cookie_length, ENC_NA); + proto_item_append_text(parameter_item, " (%u byte%s)", cookie_length, plurality(cookie_length, "", "s")); +} + +static void +dissect_pe_identifier_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item) +{ + proto_tree_add_item(parameter_tree, hf_pe_identifier, parameter_tvb, PE_IDENTIFIER_OFFSET, PE_IDENTIFIER_LENGTH, ENC_BIG_ENDIAN); + proto_item_append_text(parameter_item, " (0x%x)", tvb_get_ntohl(parameter_tvb, PE_IDENTIFIER_OFFSET)); +} + +static void +dissect_pe_checksum_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item) +{ + proto_tree_add_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")); +} + +static void +dissect_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, 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, pinfo, parameter_tree, parameter_item); + break; + case IPV6_ADDRESS_PARAMETER_TYPE: + dissect_ipv6_parameter(parameter_tvb, pinfo, parameter_tree, parameter_item); + break; + case DCCP_TRANSPORT_PARAMETER_TYPE: + dissect_dccp_transport_parameter(parameter_tvb, pinfo, parameter_tree); + break; + case SCTP_TRANSPORT_PARAMETER_TYPE: + dissect_sctp_transport_parameter(parameter_tvb, pinfo, parameter_tree); + break; + case TCP_TRANSPORT_PARAMETER_TYPE: + dissect_tcp_transport_parameter(parameter_tvb, pinfo, parameter_tree); + break; + case UDP_TRANSPORT_PARAMETER_TYPE: + dissect_udp_transport_parameter(parameter_tvb, pinfo, parameter_tree); + break; + case UDP_LITE_TRANSPORT_PARAMETER_TYPE: + dissect_udp_lite_transport_parameter(parameter_tvb, pinfo, parameter_tree); + break; + case POOL_MEMBER_SELECTION_POLICY_PARAMETER_TYPE: + dissect_pool_member_selection_policy_parameter(parameter_tvb, parameter_tree); + break; + case POOL_HANDLE_PARAMETER_TYPE: + dissect_pool_handle_parameter(parameter_tvb, pinfo, parameter_tree); + break; + case POOL_ELEMENT_PARAMETER_TYPE: + dissect_pool_element_parameter(parameter_tvb, pinfo, parameter_tree); + break; + case SERVER_INFORMATION_PARAMETER_TYPE: + dissect_server_information_parameter(parameter_tvb, pinfo, parameter_tree); + break; + case OPERATION_ERROR_PARAMETER_TYPE: + dissect_operation_error_parameter(parameter_tvb, pinfo, parameter_tree); + break; + case COOKIE_PARAMETER_TYPE: + dissect_cookie_parameter(parameter_tvb, parameter_tree, parameter_item); + break; + case PE_IDENTIFIER_PARAMETER_TYPE: + dissect_pe_identifier_parameter(parameter_tvb, parameter_tree, parameter_item); + break; + case PE_CHECKSUM_PARAMETER_TYPE: + dissect_pe_checksum_parameter(parameter_tvb, parameter_tree, parameter_item); + break; + 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, packet_info *pinfo, proto_tree *tree) +{ + gint offset, length, total_length, remaining_length; + tvbuff_t *parameter_tvb; + + offset = 0; + while((remaining_length = tvb_reported_length_remaining(parameters_tvb, offset)) > 0) { + length = tvb_get_ntohs(parameters_tvb, offset + PARAMETER_LENGTH_OFFSET); + total_length = WS_ROUNDUP_4(length); + if (remaining_length >= length) + total_length = MIN(total_length, remaining_length); + /* create a tvb for the parameter including the padding bytes */ + parameter_tvb = tvb_new_subset_length(parameters_tvb, offset, total_length); + dissect_parameter(parameter_tvb, pinfo, tree); + /* get rid of the handled parameter */ + offset += total_length; + } +} + +/* Dissectors for messages. This is specific to ENRP */ + +#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, packet_info *pinfo, 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, pinfo, 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, packet_info *pinfo, 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, pinfo, 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, packet_info *pinfo, 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, pinfo, message_tree); +} + +static void +dissect_enrp_list_request_message(tvbuff_t *message_tvb, packet_info *pinfo _U_, 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, packet_info *pinfo, 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, pinfo, 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, packet_info *pinfo _U_, 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, packet_info *pinfo _U_, 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, packet_info *pinfo _U_, 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, packet_info *pinfo, 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, pinfo, message_tree); +} + +static void +dissect_unknown_message(tvbuff_t *message_tvb, packet_info *pinfo _U_, 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) +{ + enrp_tap_rec_t *tap_rec; + proto_item *flags_item; + proto_tree *flags_tree; + guint8 type; + + type = tvb_get_guint8(message_tvb, MESSAGE_TYPE_OFFSET); + if (p_get_proto_depth(pinfo, proto_enrp) == 1) { + tap_rec = wmem_new0(pinfo->pool, enrp_tap_rec_t); + tap_rec->type = type; + tap_rec->size = tvb_get_ntohs(message_tvb, MESSAGE_LENGTH_OFFSET); + tap_rec->type_string = val_to_str_const(tap_rec->type, message_type_values, "Unknown ENRP type"); + tap_queue_packet(enrp_tap, pinfo, tap_rec); + + 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, pinfo, 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, pinfo, enrp_tree, flags_tree); + break; + case ENRP_HANDLE_UPDATE_MESSAGE_TYPE: + dissect_enrp_handle_update_message(message_tvb, pinfo, enrp_tree, flags_tree); + break; + case ENRP_LIST_REQUEST_MESSAGE_TYPE: + dissect_enrp_list_request_message(message_tvb, pinfo, enrp_tree, flags_tree); + break; + case ENRP_LIST_RESPONSE_MESSAGE_TYPE: + dissect_enrp_list_response_message(message_tvb, pinfo, enrp_tree, flags_tree); + break; + case ENRP_INIT_TAKEOVER_MESSAGE_TYPE: + dissect_enrp_init_takeover_message(message_tvb, pinfo, enrp_tree, flags_tree); + break; + case ENRP_INIT_TAKEOVER_ACK_MESSAGE_TYPE: + dissect_enrp_init_takeover_ack_message(message_tvb, pinfo, enrp_tree, flags_tree); + break; + case ENRP_TAKEOVER_SERVER_MESSAGE_TYPE: + dissect_enrp_init_takeover_server_message(message_tvb, pinfo, enrp_tree, flags_tree); + break; + case ENRP_ERROR_MESSAGE_TYPE: + dissect_enrp_error_message(message_tvb, pinfo, enrp_tree, flags_tree); + break; + default: + dissect_unknown_message(message_tvb, pinfo, enrp_tree, flags_tree); + break; + } + } +} + +#define ENRP_MAX_RECURSION_DEPTH 10 + +static void +dissect_enrp_main(tvbuff_t *message_tvb, packet_info *pinfo, proto_tree *tree) +{ + proto_item *enrp_item; + proto_tree *enrp_tree; + unsigned recursion_depth = p_get_proto_depth(pinfo, proto_enrp); + + if (++recursion_depth >= ENRP_MAX_RECURSION_DEPTH) { + proto_tree_add_expert(tree, pinfo, &ei_enrp_max_recursion_depth_reached, + message_tvb, 0, 0); + return; + } + p_set_proto_depth(pinfo, proto_enrp, recursion_depth); + + /* 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); +} + +static int +dissect_enrp(tvbuff_t *message_tvb, packet_info *pinfo, proto_tree *tree, void* data _U_) +{ + col_set_str(pinfo->cinfo, COL_PROTOCOL, "ENRP"); + + dissect_enrp_main(message_tvb, pinfo, tree); + return tvb_captured_length(message_tvb); +} + +/* TAP STAT INFO */ +typedef enum +{ + MESSAGE_TYPE_COLUMN = 0, + MESSAGES_COLUMN, + MESSAGES_SHARE_COLUMN, + BYTES_COLUMN, + BYTES_SHARE_COLUMN, + FIRST_SEEN_COLUMN, + LAST_SEEN_COLUMN, + INTERVAL_COLUMN, + MESSAGE_RATE_COLUMN, + BYTE_RATE_COLUMN +} enrp_stat_columns; + +static stat_tap_table_item enrp_stat_fields[] = { + { TABLE_ITEM_STRING, TAP_ALIGN_LEFT, "NetPerfMeter Message Type", "%-25s" }, + { TABLE_ITEM_UINT, TAP_ALIGN_RIGHT, "Messages ", "%u" }, + { TABLE_ITEM_UINT, TAP_ALIGN_RIGHT, "Messages Share (%)" , "%1.3f %%" }, + { TABLE_ITEM_UINT, TAP_ALIGN_RIGHT, "Bytes (B)", "%u" }, + { TABLE_ITEM_UINT, TAP_ALIGN_RIGHT, "Bytes Share (%) ", "%1.3f %%" }, + { TABLE_ITEM_FLOAT, TAP_ALIGN_LEFT, "First Seen (s)", "%1.6f" }, + { TABLE_ITEM_FLOAT, TAP_ALIGN_LEFT, "Last Seen (s)", "%1.6f" }, + { TABLE_ITEM_FLOAT, TAP_ALIGN_LEFT, "Interval (s)", "%1.6f" }, + { TABLE_ITEM_FLOAT, TAP_ALIGN_LEFT, "Message Rate (Msg/s)", "%1.2f" }, + { TABLE_ITEM_FLOAT, TAP_ALIGN_LEFT, "Byte Rate (B/s)", "%1.2f" } +}; + +static void enrp_stat_init(stat_tap_table_ui* new_stat) +{ + const char *table_name = "NetPerfMeter Statistics"; + int num_fields = sizeof(enrp_stat_fields)/sizeof(stat_tap_table_item); + stat_tap_table *table; + int i = 0; + stat_tap_table_item_type items[sizeof(enrp_stat_fields)/sizeof(stat_tap_table_item)]; + + table = stat_tap_find_table(new_stat, table_name); + if (table) { + if (new_stat->stat_tap_reset_table_cb) { + new_stat->stat_tap_reset_table_cb(table); + } + return; + } + + table = stat_tap_init_table(table_name, num_fields, 0, NULL); + stat_tap_add_table(new_stat, table); + + memset(items, 0x0, sizeof(items)); + /* Add a row for each value type */ + while (message_type_values[i].strptr) { + items[MESSAGE_TYPE_COLUMN].type = TABLE_ITEM_STRING; + items[MESSAGE_TYPE_COLUMN].value.string_value = message_type_values[i].strptr; + items[MESSAGES_COLUMN].type = TABLE_ITEM_UINT; + items[MESSAGES_COLUMN].value.uint_value = 0; + items[MESSAGES_SHARE_COLUMN].type = TABLE_ITEM_NONE; + items[MESSAGES_SHARE_COLUMN].value.float_value = -1.0; + items[BYTES_COLUMN].type = TABLE_ITEM_UINT; + items[BYTES_COLUMN].value.uint_value = 0; + items[BYTES_SHARE_COLUMN].type = TABLE_ITEM_NONE; + items[BYTES_SHARE_COLUMN].value.float_value = -1.0; + items[FIRST_SEEN_COLUMN].type = TABLE_ITEM_NONE; + items[FIRST_SEEN_COLUMN].value.float_value = DBL_MAX; + items[LAST_SEEN_COLUMN].type = TABLE_ITEM_NONE; + items[LAST_SEEN_COLUMN].value.float_value = DBL_MIN; + items[INTERVAL_COLUMN].type = TABLE_ITEM_NONE; + items[INTERVAL_COLUMN].value.float_value = -1.0; + items[MESSAGE_RATE_COLUMN].type = TABLE_ITEM_NONE; + items[MESSAGE_RATE_COLUMN].value.float_value = -1.0; + items[BYTE_RATE_COLUMN].type = TABLE_ITEM_NONE; + items[BYTE_RATE_COLUMN].value.float_value = -1.0; + stat_tap_init_table_row(table, i, num_fields, items); + i++; + } +} + +static tap_packet_status +enrp_stat_packet(void* tapdata, packet_info* pinfo _U_, epan_dissect_t* edt _U_, const void* data, tap_flags_t flags _U_) +{ + stat_data_t* stat_data = (stat_data_t*)tapdata; + const enrp_tap_rec_t* tap_rec = (const enrp_tap_rec_t*)data; + stat_tap_table* table; + stat_tap_table_item_type* msg_data; + gint idx; + guint64 messages; + guint64 bytes; + int i = 0; + double firstSeen = -1.0; + double lastSeen = -1.0; + + idx = str_to_val_idx(tap_rec->type_string, message_type_values); + if (idx < 0) + return TAP_PACKET_DONT_REDRAW; + + table = g_array_index(stat_data->stat_tap_data->tables, stat_tap_table*, 0); + + /* Update packets counter */ + enrp_total_msgs++; + msg_data = stat_tap_get_field_data(table, idx, MESSAGES_COLUMN); + msg_data->value.uint_value++; + messages = msg_data->value.uint_value; + stat_tap_set_field_data(table, idx, MESSAGES_COLUMN, msg_data); + + /* Update bytes counter */ + enrp_total_bytes += tap_rec->size; + msg_data = stat_tap_get_field_data(table, idx, BYTES_COLUMN); + msg_data->value.uint_value += tap_rec->size; + bytes = msg_data->value.uint_value; + stat_tap_set_field_data(table, idx, BYTES_COLUMN, msg_data); + + /* Update messages and bytes share */ + while (message_type_values[i].strptr) { + msg_data = stat_tap_get_field_data(table, i, MESSAGES_COLUMN); + const guint m = msg_data->value.uint_value; + msg_data = stat_tap_get_field_data(table, i, BYTES_COLUMN); + const guint b = msg_data->value.uint_value; + + msg_data = stat_tap_get_field_data(table, i, MESSAGES_SHARE_COLUMN); + msg_data->type = TABLE_ITEM_FLOAT; + msg_data->value.float_value = 100.0 * m / (double)enrp_total_msgs; + stat_tap_set_field_data(table, i, MESSAGES_SHARE_COLUMN, msg_data); + + msg_data = stat_tap_get_field_data(table, i, BYTES_SHARE_COLUMN); + msg_data->type = TABLE_ITEM_FLOAT; + msg_data->value.float_value = 100.0 * b / (double)enrp_total_bytes; + stat_tap_set_field_data(table, i, BYTES_SHARE_COLUMN, msg_data); + i++; + } + + /* Update first seen time */ + if (pinfo->presence_flags & PINFO_HAS_TS) { + msg_data = stat_tap_get_field_data(table, idx, FIRST_SEEN_COLUMN); + msg_data->type = TABLE_ITEM_FLOAT; + msg_data->value.float_value = MIN(msg_data->value.float_value, nstime_to_sec(&pinfo->rel_ts)); + firstSeen = msg_data->value.float_value; + stat_tap_set_field_data(table, idx, FIRST_SEEN_COLUMN, msg_data); + } + + /* Update last seen time */ + if (pinfo->presence_flags & PINFO_HAS_TS) { + msg_data = stat_tap_get_field_data(table, idx, LAST_SEEN_COLUMN); + msg_data->type = TABLE_ITEM_FLOAT; + msg_data->value.float_value = MAX(msg_data->value.float_value, nstime_to_sec(&pinfo->rel_ts)); + lastSeen = msg_data->value.float_value; + stat_tap_set_field_data(table, idx, LAST_SEEN_COLUMN, msg_data); + } + + if ((lastSeen - firstSeen) > 0.0) { + /* Update interval */ + msg_data = stat_tap_get_field_data(table, idx, INTERVAL_COLUMN); + msg_data->type = TABLE_ITEM_FLOAT; + msg_data->value.float_value = lastSeen - firstSeen; + stat_tap_set_field_data(table, idx, INTERVAL_COLUMN, msg_data); + + /* Update message rate */ + msg_data = stat_tap_get_field_data(table, idx, MESSAGE_RATE_COLUMN); + msg_data->type = TABLE_ITEM_FLOAT; + msg_data->value.float_value = messages / (lastSeen - firstSeen); + stat_tap_set_field_data(table, idx, MESSAGE_RATE_COLUMN, msg_data); + + /* Update byte rate */ + msg_data = stat_tap_get_field_data(table, idx, BYTE_RATE_COLUMN); + msg_data->type = TABLE_ITEM_FLOAT; + msg_data->value.float_value = bytes / (lastSeen - firstSeen); + stat_tap_set_field_data(table, idx, BYTE_RATE_COLUMN, msg_data); + } + + return TAP_PACKET_REDRAW; +} + +static void +enrp_stat_reset(stat_tap_table* table) +{ + guint element; + stat_tap_table_item_type* item_data; + + for (element = 0; element < table->num_elements; element++) { + item_data = stat_tap_get_field_data(table, element, MESSAGES_COLUMN); + item_data->value.uint_value = 0; + stat_tap_set_field_data(table, element, MESSAGES_COLUMN, item_data); + + item_data = stat_tap_get_field_data(table, element, MESSAGES_SHARE_COLUMN); + item_data->type = TABLE_ITEM_NONE; + item_data->value.float_value = -1.0; + stat_tap_set_field_data(table, element, MESSAGES_SHARE_COLUMN, item_data); + + item_data = stat_tap_get_field_data(table, element, BYTES_COLUMN); + item_data->value.uint_value = 0; + stat_tap_set_field_data(table, element, BYTES_COLUMN, item_data); + + item_data = stat_tap_get_field_data(table, element, BYTES_SHARE_COLUMN); + item_data->type = TABLE_ITEM_NONE; + item_data->value.float_value = -1.0; + stat_tap_set_field_data(table, element, BYTES_SHARE_COLUMN, item_data); + + item_data = stat_tap_get_field_data(table, element, FIRST_SEEN_COLUMN); + item_data->type = TABLE_ITEM_NONE; + item_data->value.float_value = DBL_MAX; + stat_tap_set_field_data(table, element, FIRST_SEEN_COLUMN, item_data); + + item_data = stat_tap_get_field_data(table, element, LAST_SEEN_COLUMN); + item_data->type = TABLE_ITEM_NONE; + item_data->value.float_value = DBL_MIN; + stat_tap_set_field_data(table, element, LAST_SEEN_COLUMN, item_data); + + item_data = stat_tap_get_field_data(table, element, INTERVAL_COLUMN); + item_data->type = TABLE_ITEM_NONE; + item_data->value.float_value = -1.0; + stat_tap_set_field_data(table, element, INTERVAL_COLUMN, item_data); + + item_data = stat_tap_get_field_data(table, element, MESSAGE_RATE_COLUMN); + item_data->type = TABLE_ITEM_NONE; + item_data->value.float_value = -1.0; + stat_tap_set_field_data(table, element, MESSAGE_RATE_COLUMN, item_data); + + item_data = stat_tap_get_field_data(table, element, BYTE_RATE_COLUMN); + item_data->type = TABLE_ITEM_NONE; + item_data->value.float_value = -1.0; + stat_tap_set_field_data(table, element, BYTE_RATE_COLUMN, item_data); + } + enrp_total_msgs = 0; + enrp_total_bytes = 0; +} + +/* 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|BASE_UNIT_STRING, &units_milliseconds, 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, + }; + + expert_module_t *expert_enrp; + + static ei_register_info ei[] = { + { &ei_enrp_max_recursion_depth_reached, { "enrp.max_recursion_depth_reached", + PI_PROTOCOL, PI_WARN, "Maximum allowed recursion depth reached - stop decoding", EXPFILL }} + }; + + static tap_param enrp_stat_params[] = { + { PARAM_FILTER, "filter", "Filter", NULL, TRUE } + }; + + static stat_tap_table_ui enrp_stat_table = { + REGISTER_STAT_GROUP_RSERPOOL, + "ENRP Statistics", + "enrp", + "enrp,stat", + enrp_stat_init, + enrp_stat_packet, + enrp_stat_reset, + NULL, + NULL, + sizeof(enrp_stat_fields)/sizeof(stat_tap_table_item), enrp_stat_fields, + sizeof(enrp_stat_params)/sizeof(tap_param), enrp_stat_params, + NULL, + 0 + }; + + /* Register the protocol name and description */ + proto_enrp = proto_register_protocol("Endpoint Handlespace Redundancy Protocol", "ENRP", "enrp"); + + expert_enrp = expert_register_protocol(proto_enrp); + expert_register_field_array(expert_enrp, ei, array_length(ei)); + + /* 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)); + enrp_tap = register_tap("enrp"); + + enrp_handle = register_dissector("enrp", dissect_enrp, proto_enrp); + register_stat_tap_table_ui(&enrp_stat_table); +} + +void +proto_reg_handoff_enrp(void) +{ + dissector_add_uint("sctp.ppi", ENRP_PAYLOAD_PROTOCOL_ID, enrp_handle); + dissector_add_uint("sctp.port", ENRP_SCTP_PORT, enrp_handle); + dissector_add_uint_with_preference("udp.port", ENRP_UDP_PORT, enrp_handle); +} + +/* + * Editor modelines - https://www.wireshark.org/tools/modelines.html + * + * Local Variables: + * c-basic-offset: 2 + * tab-width: 8 + * indent-tabs-mode: nil + * End: + * + * ex: set shiftwidth=2 tabstop=8 expandtab: + * :indentSize=2:tabSize=8:noTabs=true: + */ |