528 lines
18 KiB
C
528 lines
18 KiB
C
/* msg_dreg.c
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* WiMax MAC Management DREG-REQ, DREG-CMD Message decoders
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*
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* Copyright (c) 2007 by Intel Corporation.
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*
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* Author: John R. Underwood <junderx@yahoo.com>
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1999 Gerald Combs
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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/* Include files */
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#include "config.h"
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#include <epan/packet.h>
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#include "wimax_tlv.h"
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#include "wimax_mac.h"
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#include "wimax_utils.h"
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extern gboolean include_cor2_changes;
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void proto_register_mac_mgmt_msg_dreg_req(void);
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void proto_register_mac_mgmt_msg_dreg_cmd(void);
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void proto_reg_handoff_mac_mgmt_msg_dreg(void);
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/* Forward reference */
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static void dissect_dreg_tlv(proto_tree *dreg_tree, gint tlv_type, tvbuff_t *tvb, guint tlv_offset, guint tlv_len);
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static gint proto_mac_mgmt_msg_dreg_req_decoder = -1;
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static gint proto_mac_mgmt_msg_dreg_cmd_decoder = -1;
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static gint ett_mac_mgmt_msg_dreg_decoder = -1;
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/* Setup protocol subtree array */
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static gint *ett[] =
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{
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&ett_mac_mgmt_msg_dreg_decoder,
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};
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/* DREG fields */
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/* static gint hf_ack_type_reserved = -1; */
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static gint hf_dreg_cmd_action = -1;
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static gint hf_dreg_cmd_action_cor2 = -1;
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static gint hf_dreg_cmd_reserved = -1;
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static gint hf_dreg_paging_cycle = -1;
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static gint hf_dreg_paging_offset = -1;
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static gint hf_dreg_paging_group_id = -1;
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static gint hf_dreg_req_duration = -1;
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static gint hf_paging_controller_id = -1;
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static gint hf_mac_hash_skip_threshold = -1;
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static gint hf_dreg_paging_cycle_request = -1;
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static gint hf_dreg_retain_ms_service_sbc = -1;
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static gint hf_dreg_retain_ms_service_pkm = -1;
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static gint hf_dreg_retain_ms_service_reg = -1;
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static gint hf_dreg_retain_ms_service_network_address = -1;
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static gint hf_dreg_retain_ms_service_tod = -1;
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static gint hf_dreg_retain_ms_service_tftp = -1;
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static gint hf_dreg_retain_ms_service_full_service = -1;
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static gint hf_dreg_consider_paging_pref = -1;
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static gint hf_tlv_value = -1;
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static gint hf_dreg_req_action = -1;
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static gint hf_dreg_req_reserved = -1;
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static gint hf_dreg_invalid_tlv = -1;
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/* STRING RESOURCES */
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static const value_string vals_dreg_req_code[] = {
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{0, "SS De-Registration request from BS and network"},
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{1, "MS request for De-Registration from serving BS and initiation of Idle Mode"},
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{2, "MS response for the Unsolicited De-Registration initiated by BS"},
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{3, "Reject for the unsolicited DREG-CMD with action \
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code 05 (idle mode request) by the BS. \
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Applicable only when MS has pending UL data to transmit"},
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{4, "Reserved"},
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{0, NULL}
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};
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static const value_string vals_dreg_cmd_action[] = {
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{0, "SS shall immediately terminate service with the BS and \
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should attempt network entry at another BS"},
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{1, "SS shall listen to the current channel BS but shall not \
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transmit until an RES-CMD message or DREG-CMD with \
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Action Code 02 or 03 is received"},
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{2, "SS shall listen to the BS but only transmit \
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on the Basic, and Primary Management Connections"},
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{3, "SS shall return to normal operation and may transmit on \
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any of its active connections"},
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{4, "SS shall terminate current Normal Operations with the BS; \
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the BS shall transmit this action code only in response \
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to any SS DREG-REQ message"},
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{5, "MS shall immediately begin de-registration from serving \
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BS and request initiation of MS Idle Mode"},
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{6, "The MS may retransmit the DREG-REQ message after the \
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time duration (REQ-duration) provided in the message"},
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{7, "The MS shall not retransmit the DREG-REQ message and shall \
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wait for the DREG-CMD message. BS transmittal of a \
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subsequent DREG-CMD with Action Code 03 shall cancel \
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this restriction"},
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{0, NULL}
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};
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static const value_string vals_dreg_cmd_action_cor2[] = {
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{0, "SS shall immediately terminate service with the BS and \
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should attempt network entry at another BS"},
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{1, "SS shall listen to the current channel BS but shall not \
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transmit until an RES-CMD message or DREG-CMD with \
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Action Code 02 or 03 is received"},
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{2, "SS shall listen to the BS but only transmit \
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on the Basic, and Primary Management Connections"},
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{3, "SS shall return to normal operation and may transmit on \
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any of its active connections"},
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{4, "Only valid in response to a DREG-REQ message with DREG \
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Code = 00. SS shall terminate current Normal Operations with the BS"},
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{5, "MS shall immediately begin de-registration from serving \
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BS and request initiation of MS Idle Mode"},
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{6, "Only valid in response to a DREG-REQ message with DREG \
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Code = 01. The MS may retransmit the DREG-REQ message after the \
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REQ-duration provided in the message; \
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BS sending a subsequent DREG-CMD message with \
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Action Code 03 cancels this restriction"},
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{0, NULL}
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};
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/* Decode sub-TLV's of either DREG-REQ or DREG-CMD. */
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static void dissect_dreg_tlv(proto_tree *dreg_tree, gint tlv_type, tvbuff_t *tvb, guint tlv_offset, guint tlv_len)
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{
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switch (tlv_type) {
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case DREG_PAGING_INFO:
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proto_tree_add_item(dreg_tree, hf_dreg_paging_cycle, tvb, tlv_offset, 2, ENC_BIG_ENDIAN);
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proto_tree_add_item(dreg_tree, hf_dreg_paging_offset, tvb, tlv_offset + 2, 1, ENC_BIG_ENDIAN);
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proto_tree_add_item(dreg_tree, hf_dreg_paging_group_id, tvb, tlv_offset + 3, 2, ENC_BIG_ENDIAN);
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break;
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case DREG_REQ_DURATION:
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proto_tree_add_item(dreg_tree, hf_dreg_req_duration, tvb, tlv_offset, 1, ENC_BIG_ENDIAN);
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break;
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case DREG_PAGING_CONTROLLER_ID:
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proto_tree_add_item(dreg_tree, hf_paging_controller_id, tvb, tlv_offset, 6, ENC_NA);
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break;
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case DREG_IDLE_MODE_RETAIN_INFO:
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proto_tree_add_item(dreg_tree, hf_dreg_retain_ms_service_sbc, tvb, tlv_offset, 1, ENC_BIG_ENDIAN);
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proto_tree_add_item(dreg_tree, hf_dreg_retain_ms_service_pkm, tvb, tlv_offset, 1, ENC_BIG_ENDIAN);
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proto_tree_add_item(dreg_tree, hf_dreg_retain_ms_service_reg, tvb, tlv_offset, 1, ENC_BIG_ENDIAN);
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proto_tree_add_item(dreg_tree, hf_dreg_retain_ms_service_network_address, tvb, tlv_offset, 1, ENC_BIG_ENDIAN);
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proto_tree_add_item(dreg_tree, hf_dreg_retain_ms_service_tod, tvb, tlv_offset, 1, ENC_BIG_ENDIAN);
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proto_tree_add_item(dreg_tree, hf_dreg_retain_ms_service_tftp, tvb, tlv_offset, 1, ENC_BIG_ENDIAN);
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proto_tree_add_item(dreg_tree, hf_dreg_retain_ms_service_full_service, tvb, tlv_offset, 1, ENC_BIG_ENDIAN);
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proto_tree_add_item(dreg_tree, hf_dreg_consider_paging_pref, tvb, tlv_offset, 1, ENC_BIG_ENDIAN);
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break;
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case DREG_MAC_HASH_SKIP_THRESHOLD:
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proto_tree_add_item(dreg_tree, hf_mac_hash_skip_threshold, tvb, tlv_offset, 2, ENC_BIG_ENDIAN);
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break;
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case DREG_PAGING_CYCLE_REQUEST:
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proto_tree_add_item(dreg_tree, hf_dreg_paging_cycle_request, tvb, tlv_offset, 2, ENC_BIG_ENDIAN);
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break;
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default:
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proto_tree_add_item(dreg_tree, hf_tlv_value, tvb, tlv_offset, tlv_len, ENC_NA);
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break;
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}
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}
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/* Register Wimax Mac Payload Protocol and Dissector */
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void proto_register_mac_mgmt_msg_dreg_req(void)
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{
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/* DREG fields display */
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static hf_register_info hf[] =
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{
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{
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&hf_dreg_consider_paging_pref,
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{
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"Consider Paging Preference of each Service Flow in resource retention", "wmx.dreg.consider_paging_preference",
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FT_UINT8, BASE_DEC, NULL, 0x80, NULL, HFILL
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}
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},
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{
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&hf_dreg_invalid_tlv,
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{
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"Invalid TLV", "wmx.dreg.invalid_tlv",
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FT_BYTES, BASE_NONE, NULL, 0, NULL, HFILL
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}
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},
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{
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&hf_mac_hash_skip_threshold,
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{
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"MAC Hash Skip Threshold", "wmx.dreg.mac_hash_skip_threshold",
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FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL
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}
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},
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{
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&hf_paging_controller_id,
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{
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"Paging Controller ID", "wmx.dreg.paging_controller_id",
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FT_ETHER, BASE_NONE, NULL, 0x0, NULL, HFILL
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}
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},
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{
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&hf_dreg_paging_cycle,
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{
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"PAGING CYCLE", "wmx.dreg.paging_cycle",
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FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL
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}
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},
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{
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&hf_dreg_paging_cycle_request,
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{
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"Paging Cycle Request", "wmx.dreg.paging_cycle_request",
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FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL
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}
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},
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{
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&hf_dreg_paging_group_id,
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{
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"Paging-group-ID", "wmx.dreg.paging_group_id",
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FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL
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}
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},
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{
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&hf_dreg_paging_offset,
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{
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"PAGING OFFSET", "wmx.dreg.paging_offset",
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FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL
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}
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},
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{
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&hf_dreg_req_duration,
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{
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"REQ-duration (Waiting value for the DREG-REQ message re-transmission in frames)", "wmx.dreg.req_duration",
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FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL
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}
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},
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{
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&hf_dreg_retain_ms_service_full_service,
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{
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"Retain MS service and operation information associated with Full service", "wmx.dreg.retain_ms_full_service",
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FT_UINT8, BASE_DEC, NULL, 0x40, NULL, HFILL
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}
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},
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{
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&hf_dreg_retain_ms_service_network_address,
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{
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"Retain MS service and operational information associated with Network Address", "wmx.dreg.retain_ms_service_network_address",
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FT_UINT8, BASE_DEC, NULL, 0x08, NULL, HFILL
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}
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},
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{
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&hf_dreg_retain_ms_service_pkm,
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{
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"Retain MS service and operational information associated with PKM-REQ/RSP", "wmx.dreg.retain_ms_service_pkm",
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FT_UINT8, BASE_DEC, NULL, 0x02, NULL, HFILL
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}
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},
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{
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&hf_dreg_retain_ms_service_reg,
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{
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"Retain MS service and operational information associated with REG-REQ/RSP", "wmx.dreg.retain_ms_service_reg",
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FT_UINT8, BASE_DEC, NULL, 0x04, NULL, HFILL
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}
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},
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{
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&hf_dreg_retain_ms_service_sbc,
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{
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"Retain MS service and operational information associated with SBC-REQ/RSP", "wmx.dreg.retain_ms_service_sbc",
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FT_UINT8, BASE_DEC, NULL, 0x01, NULL, HFILL
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}
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},
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{
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&hf_dreg_retain_ms_service_tftp,
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{
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"Retain MS service and operational information associated with TFTP messages", "wmx.dreg.retain_ms_service_tftp",
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FT_UINT8, BASE_DEC, NULL, 0x20, NULL, HFILL
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}
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},
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{
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&hf_dreg_retain_ms_service_tod,
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{
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"Retain MS service and operational information associated with Time of Day", "wmx.dreg.retain_ms_service_tod",
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FT_UINT8, BASE_DEC, NULL, 0x10, NULL, HFILL
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}
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},
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{
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&hf_dreg_cmd_action,
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{
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"DREG-CMD Action code", "wmx.dreg_cmd.action",
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FT_UINT8, BASE_DEC, VALS(vals_dreg_cmd_action), 0x07, NULL, HFILL
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}
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},
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{
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&hf_dreg_cmd_action_cor2,
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{
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"DREG-CMD Action code", "wmx.dreg_cmd.action",
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FT_UINT8, BASE_DEC, VALS(vals_dreg_cmd_action_cor2), 0x07, NULL, HFILL
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}
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},
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{
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&hf_dreg_cmd_reserved,
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{
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"Reserved", "wmx.dreg_cmd.action_reserved",
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FT_UINT8, BASE_DEC, NULL, 0xF8, NULL, HFILL
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}
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},
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{
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&hf_dreg_req_action,
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{
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"DREG-REQ Action code", "wmx.dreg_req.action",
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FT_UINT8, BASE_DEC, VALS(vals_dreg_req_code), 0x03, NULL, HFILL
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}
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},
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{
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&hf_dreg_req_reserved,
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{
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"Reserved", "wmx.dreg_req.action_reserved",
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FT_UINT8, BASE_DEC, NULL, 0xFC, NULL, HFILL
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}
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},
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{
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&hf_tlv_value,
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{
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"Value", "wmx.dreg.unknown_tlv_value",
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FT_BYTES, BASE_NONE, NULL, 0x00, NULL, HFILL
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}
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},
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#if 0
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{
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&hf_ack_type_reserved,
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{
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"Reserved", "wmx.ack_type_reserved",
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FT_UINT8, BASE_DEC, NULL, 0x03, NULL, HFILL
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}
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}
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#endif
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};
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proto_mac_mgmt_msg_dreg_req_decoder = proto_register_protocol (
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"WiMax DREG-REQ Messages", /* name */
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"WiMax DREG-REQ", /* short name */
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"wmx.dreg_req" /* abbrev */
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);
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proto_register_field_array(proto_mac_mgmt_msg_dreg_req_decoder, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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}
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/* Register Wimax Mac Payload Protocol and Dissector */
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void proto_register_mac_mgmt_msg_dreg_cmd(void)
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{
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proto_mac_mgmt_msg_dreg_cmd_decoder = proto_register_protocol (
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"WiMax DREG-CMD Messages", /* name */
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"WiMax DREG-CMD", /* short name */
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"wmx.dreg_cmd" /* abbrev */
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);
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}
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/* Decode DREG-REQ messages. */
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static int dissect_mac_mgmt_msg_dreg_req_decoder(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
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{
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guint offset = 0;
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guint tlv_offset;
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guint tvb_len;
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proto_item *dreg_req_item;
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proto_tree *dreg_req_tree;
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proto_tree *tlv_tree = NULL;
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tlv_info_t tlv_info;
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gint tlv_type;
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gint tlv_len;
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gboolean hmac_found = FALSE;
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{ /* we are being asked for details */
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/* Get the tvb reported length */
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tvb_len = tvb_reported_length(tvb);
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/* display MAC payload type DREG-REQ */
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dreg_req_item = proto_tree_add_protocol_format(tree, proto_mac_mgmt_msg_dreg_req_decoder, tvb, 0, -1, "MAC Management Message, DREG-REQ");
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/* add MAC DREG REQ subtree */
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dreg_req_tree = proto_item_add_subtree(dreg_req_item, ett_mac_mgmt_msg_dreg_decoder);
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/* display the Action Code */
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proto_tree_add_item(dreg_req_tree, hf_dreg_req_action, tvb, offset, 1, ENC_BIG_ENDIAN);
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/* show the Reserved bits */
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proto_tree_add_item(dreg_req_tree, hf_dreg_req_reserved, tvb, offset, 1, ENC_BIG_ENDIAN);
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offset++;
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while(offset < tvb_len)
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{
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/* Get the TLV data. */
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init_tlv_info(&tlv_info, tvb, offset);
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/* get the TLV type */
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tlv_type = get_tlv_type(&tlv_info);
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/* get the TLV length */
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tlv_len = get_tlv_length(&tlv_info);
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if(tlv_type == -1 || tlv_len > MAX_TLV_LEN || tlv_len < 1)
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{ /* invalid tlv info */
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col_append_sep_str(pinfo->cinfo, COL_INFO, NULL, "DREG-REQ TLV error");
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proto_tree_add_item(dreg_req_tree, hf_dreg_invalid_tlv, tvb, offset, (tvb_len - offset), ENC_NA);
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break;
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}
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/* get the offset to the TLV data */
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tlv_offset = offset + get_tlv_value_offset(&tlv_info);
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switch (tlv_type) {
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case HMAC_TUPLE: /* Table 348d */
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/* decode and display the HMAC Tuple */
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tlv_tree = add_protocol_subtree(&tlv_info, ett_mac_mgmt_msg_dreg_decoder, dreg_req_tree, proto_mac_mgmt_msg_dreg_req_decoder, tvb, offset, tlv_len, "HMAC Tuple");
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wimax_hmac_tuple_decoder(tlv_tree, tvb, tlv_offset, tlv_len);
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hmac_found = TRUE;
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break;
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case CMAC_TUPLE: /* Table 348b */
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/* decode and display the CMAC Tuple */
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tlv_tree = add_protocol_subtree(&tlv_info, ett_mac_mgmt_msg_dreg_decoder, dreg_req_tree, proto_mac_mgmt_msg_dreg_req_decoder, tvb, offset, tlv_len, "CMAC Tuple");
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wimax_cmac_tuple_decoder(tlv_tree, tvb, tlv_offset, tlv_len);
|
|
break;
|
|
default:
|
|
/* Decode DREG-REQ sub-TLV's */
|
|
tlv_tree = add_protocol_subtree(&tlv_info, ett_mac_mgmt_msg_dreg_decoder, dreg_req_tree, proto_mac_mgmt_msg_dreg_req_decoder, tvb, offset, tlv_len, "DREG-REQ sub-TLV's");
|
|
dissect_dreg_tlv(tlv_tree, tlv_type, tvb, tlv_offset, tlv_len);
|
|
break;
|
|
}
|
|
|
|
|
|
offset = tlv_len + tlv_offset;
|
|
} /* end of TLV process while loop */
|
|
if (!hmac_found)
|
|
proto_item_append_text(dreg_req_tree, " (HMAC Tuple is missing !)");
|
|
}
|
|
return tvb_captured_length(tvb);
|
|
}
|
|
|
|
/* Decode DREG-CMD messages. */
|
|
static int dissect_mac_mgmt_msg_dreg_cmd_decoder(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
|
|
{
|
|
guint offset = 0;
|
|
guint tlv_offset;
|
|
guint tvb_len;
|
|
proto_item *dreg_cmd_item;
|
|
proto_tree *dreg_cmd_tree;
|
|
proto_tree *tlv_tree = NULL;
|
|
tlv_info_t tlv_info;
|
|
gint tlv_type;
|
|
gint tlv_len;
|
|
gboolean hmac_found = FALSE;
|
|
|
|
{ /* we are being asked for details */
|
|
|
|
/* Get the tvb reported length */
|
|
tvb_len = tvb_reported_length(tvb);
|
|
/* display MAC payload type DREG-CMD */
|
|
dreg_cmd_item = proto_tree_add_protocol_format(tree, proto_mac_mgmt_msg_dreg_cmd_decoder, tvb, 0, -1, "MAC Management Message, DREG-CMD");
|
|
/* add MAC DREG CMD subtree */
|
|
dreg_cmd_tree = proto_item_add_subtree(dreg_cmd_item, ett_mac_mgmt_msg_dreg_decoder);
|
|
/* display the Action Code */
|
|
if (include_cor2_changes)
|
|
proto_tree_add_item(dreg_cmd_tree, hf_dreg_cmd_action_cor2, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
else
|
|
proto_tree_add_item(dreg_cmd_tree, hf_dreg_cmd_action, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
/* show the Reserved bits */
|
|
proto_tree_add_item(dreg_cmd_tree, hf_dreg_cmd_reserved, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset ++;
|
|
|
|
while(offset < tvb_len)
|
|
{
|
|
/* Get the TLV data. */
|
|
init_tlv_info(&tlv_info, tvb, offset);
|
|
/* get the TLV type */
|
|
tlv_type = get_tlv_type(&tlv_info);
|
|
/* get the TLV length */
|
|
tlv_len = get_tlv_length(&tlv_info);
|
|
if(tlv_type == -1 || tlv_len > MAX_TLV_LEN || tlv_len < 1)
|
|
{ /* invalid tlv info */
|
|
col_append_sep_str(pinfo->cinfo, COL_INFO, NULL, "DREG-CMD TLV error");
|
|
proto_tree_add_item(dreg_cmd_tree, hf_dreg_invalid_tlv, tvb, offset, (tvb_len - offset), ENC_NA);
|
|
break;
|
|
}
|
|
/* get the offset to the TLV data */
|
|
tlv_offset = offset + get_tlv_value_offset(&tlv_info);
|
|
|
|
switch (tlv_type) {
|
|
case HMAC_TUPLE: /* Table 348d */
|
|
/* decode and display the HMAC Tuple */
|
|
tlv_tree = add_protocol_subtree(&tlv_info, ett_mac_mgmt_msg_dreg_decoder, dreg_cmd_tree, proto_mac_mgmt_msg_dreg_cmd_decoder, tvb, offset, tlv_len, "HMAC Tuple");
|
|
wimax_hmac_tuple_decoder(tlv_tree, tvb, tlv_offset, tlv_len);
|
|
hmac_found = TRUE;
|
|
break;
|
|
case CMAC_TUPLE: /* Table 348b */
|
|
/* decode and display the CMAC Tuple */
|
|
tlv_tree = add_protocol_subtree(&tlv_info, ett_mac_mgmt_msg_dreg_decoder, dreg_cmd_tree, proto_mac_mgmt_msg_dreg_cmd_decoder, tvb, offset, tlv_len, "CMAC Tuple");
|
|
wimax_cmac_tuple_decoder(tlv_tree, tvb, tlv_offset, tlv_len);
|
|
break;
|
|
default:
|
|
/* Decode DREG-CMD sub-TLV's */
|
|
tlv_tree = add_protocol_subtree(&tlv_info, ett_mac_mgmt_msg_dreg_decoder, dreg_cmd_tree, proto_mac_mgmt_msg_dreg_cmd_decoder, tvb, offset, tlv_len, "DREG-CMD sub-TLV's");
|
|
dissect_dreg_tlv(tlv_tree, tlv_type, tvb, tlv_offset, tlv_len);
|
|
break;
|
|
}
|
|
|
|
offset = tlv_len + tlv_offset;
|
|
} /* end of TLV process while loop */
|
|
if (!hmac_found)
|
|
proto_item_append_text(dreg_cmd_tree, " (HMAC Tuple is missing !)");
|
|
}
|
|
return tvb_captured_length(tvb);
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_mac_mgmt_msg_dreg(void)
|
|
{
|
|
dissector_handle_t dreg_handle;
|
|
|
|
dreg_handle = create_dissector_handle(dissect_mac_mgmt_msg_dreg_req_decoder, proto_mac_mgmt_msg_dreg_req_decoder);
|
|
dissector_add_uint("wmx.mgmtmsg", MAC_MGMT_MSG_DREG_REQ, dreg_handle);
|
|
|
|
dreg_handle = create_dissector_handle(dissect_mac_mgmt_msg_dreg_cmd_decoder, proto_mac_mgmt_msg_dreg_cmd_decoder);
|
|
dissector_add_uint("wmx.mgmtmsg", MAC_MGMT_MSG_DREG_CMD, dreg_handle);
|
|
}
|
|
|
|
/*
|
|
* Editor modelines - https://www.wireshark.org/tools/modelines.html
|
|
*
|
|
* Local variables:
|
|
* c-basic-offset: 8
|
|
* tab-width: 8
|
|
* indent-tabs-mode: t
|
|
* End:
|
|
*
|
|
* vi: set shiftwidth=8 tabstop=8 noexpandtab:
|
|
* :indentSize=8:tabSize=8:noTabs=false:
|
|
*/
|