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/* msg_reg_rsp.c
* WiMax MAC Management REG-RSP Message decoder
*
* Copyright (c) 2007 by Intel Corporation.
*
* Author: John R. Underwood <junderx@yahoo.com>
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1999 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
/* Include files */
#include "config.h"
#define WIMAX_16E_2005
#define FRAG_LAST 0x1
#include <epan/packet.h>
#include "wimax_tlv.h"
#include "wimax_mac.h"
#include "wimax_utils.h"
void proto_register_mac_mgmt_msg_reg_rsp(void);
void proto_reg_handoff_mac_mgmt_msg_reg_rsp(void);
static dissector_handle_t reg_rsp_handle;
extern gboolean include_cor2_changes;
static dissector_handle_t dsc_rsp_handle = NULL;
static gint proto_mac_mgmt_msg_reg_rsp_decoder = -1;
static gint ett_mac_mgmt_msg_reg_rsp_decoder = -1;
static gint ett_reg_rsp_message_tree = -1;
/* NCT messages */
/* REG-RSP fields */
static gint hf_reg_rsp_status = -1;
static gint hf_tlv_type = -1;
/* static gint hf_tlv_value = -1; */
static gint hf_reg_rsp_secondary_mgmt_cid = -1;
static gint hf_reg_invalid_tlv = -1;
static gint hf_reg_rsp_new_cid_after_ho = -1;
static gint hf_reg_rsp_service_flow_id = -1;
static gint hf_reg_rsp_system_resource_retain_time = -1;
static gint hf_reg_total_provisioned_sf = -1;
/* STRING RESOURCES */
static const value_string vals_reg_rsp_status [] = {
{0, "OK"},
{1, "Message authentication failure"},
{0, NULL}
};
/* Decode REG-RSP messages. */
static int dissect_mac_mgmt_msg_reg_rsp_decoder(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
guint offset = 0;
guint tlv_offset;
guint tvb_len;
proto_item *reg_rsp_item;
proto_tree *reg_rsp_tree;
proto_item *tlv_item = NULL;
proto_tree *tlv_tree = NULL;
proto_tree *sub_tree = NULL;
gboolean hmac_found = FALSE;
tlv_info_t tlv_info;
gint tlv_type;
guint tlv_len;
guint this_offset = 0;
tlv_info_t sub_tlv_info;
gint sub_tlv_type;
gint sub_tlv_len;
guint sub_tlv_offset;
{ /* we are being asked for details */
/* Get the tvb reported length */
tvb_len = tvb_reported_length(tvb);
/* display MAC payload type REG-RSP */
reg_rsp_item = proto_tree_add_protocol_format(tree, proto_mac_mgmt_msg_reg_rsp_decoder, tvb, offset, tvb_len, "MAC Management Message, REG-RSP");
/* add MAC REG-RSP subtree */
reg_rsp_tree = proto_item_add_subtree(reg_rsp_item, ett_mac_mgmt_msg_reg_rsp_decoder);
proto_tree_add_item(reg_rsp_tree, hf_reg_rsp_status, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
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, "REG-RSP TLV error");
proto_tree_add_item(reg_rsp_tree, hf_reg_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 REG_ARQ_PARAMETERS:
case REG_SS_MGMT_SUPPORT:
case REG_IP_MGMT_MODE:
case REG_IP_VERSION:
case REG_UL_TRANSPORT_CIDS_SUPPORTED:
case REG_IP_PHS_SDU_ENCAP:
case REG_MAX_CLASSIFIERS_SUPPORTED:
case REG_PHS_SUPPORT:
case REG_ARQ_SUPPORT:
case REG_DSX_FLOW_CONTROL:
case REG_MCA_FLOW_CONTROL:
case REG_MCAST_POLLING_CIDS:
case REG_NUM_DL_TRANS_CID:
case REG_MAC_ADDRESS:
#ifdef WIMAX_16E_2005
case REG_TLV_T_20_MAX_MAC_DATA_PER_FRAME_SUPPORT:
case REG_TLV_T_21_PACKING_SUPPORT:
case REG_TLV_T_22_MAC_EXTENDED_RTPS_SUPPORT:
case REG_TLV_T_23_MAX_NUM_BURSTS_TRANSMITTED_CONCURRENTLY_TO_THE_MS:
case REG_TLV_T_26_METHOD_FOR_ALLOCATING_IP_ADDR_SECONDARY_MGMNT_CONNECTION:
case REG_TLV_T_27_HANDOVER_SUPPORTED:
case REG_TLV_T_29_HO_PROCESS_OPTIMIZATION_MS_TIMER:
case REG_TLV_T_31_MOBILITY_FEATURES_SUPPORTED:
case REG_TLV_T_40_ARQ_ACK_TYPE:
case REG_TLV_T_41_MS_HO_CONNECTIONS_PARAM_PROCESSING_TIME:
case REG_TLV_T_42_MS_HO_TEK_PROCESSING_TIME:
case REG_TLV_T_43_MAC_HEADER_AND_EXTENDED_SUBHEADER_SUPPORT:
case REG_POWER_SAVING_CLASS_CAPABILITY:
#endif
dissect_extended_tlv(reg_rsp_tree, tlv_type, tvb, tlv_offset, tlv_len, pinfo, offset, proto_mac_mgmt_msg_reg_rsp_decoder);
break;
case REG_RSP_SECONDARY_MGMT_CID:
add_tlv_subtree(&tlv_info, reg_rsp_tree, hf_reg_rsp_secondary_mgmt_cid, tvb, offset, ENC_BIG_ENDIAN);
break;
case REG_RSP_TLV_T_36_TOTAL_PROVISIONED_SERVICE_FLOW_DSAs:
add_tlv_subtree(&tlv_info, reg_rsp_tree, hf_reg_total_provisioned_sf, tvb, offset, ENC_BIG_ENDIAN);
break;
case REG_RSP_TLV_T_24_CID_UPDATE_ENCODINGS:
/* Display CID update encodings */
/* add subtree */
sub_tree = add_protocol_subtree(&tlv_info, ett_reg_rsp_message_tree, reg_rsp_tree, proto_mac_mgmt_msg_reg_rsp_decoder, tvb, offset, tlv_len, "CID update encodings");
/* Use a local copy of tlv_offset */
this_offset = tlv_offset;
while(this_offset < tlv_len) {
/* Get the sub TLV data. */
init_tlv_info(&sub_tlv_info, tvb, this_offset);
/* get the sub TLV type */
sub_tlv_type = get_tlv_type(&sub_tlv_info);
/* get the TLV length */
sub_tlv_len = get_tlv_length(&sub_tlv_info);
if (sub_tlv_type == -1 || sub_tlv_len > MAX_TLV_LEN || sub_tlv_len < 1)
{ /* invalid tlv info */
col_append_sep_str(pinfo->cinfo, COL_INFO, NULL, "REG-RSP TLV error");
proto_tree_add_item(reg_rsp_tree, hf_reg_invalid_tlv, tvb, offset, (tvb_len - offset), ENC_NA);
break;
}
/* get the offset to the sub TLV data */
sub_tlv_offset = this_offset + get_tlv_value_offset(&sub_tlv_info);
switch (sub_tlv_type) {
case REG_RSP_TLV_T_24_1_CID_UPDATE_ENCODINGS_NEW_CID:
add_tlv_subtree(&sub_tlv_info, sub_tree, hf_reg_rsp_new_cid_after_ho, tvb, this_offset, ENC_BIG_ENDIAN);
break;
case REG_RSP_TLV_T_24_2_CID_UPDATE_ENCODINGS_SFID:
add_tlv_subtree(&sub_tlv_info, sub_tree, hf_reg_rsp_service_flow_id, tvb, this_offset, ENC_BIG_ENDIAN);
break;
case REG_RSP_TLV_T_24_3_CID_UPDATE_ENCODINGS_CONNECTION_INFO:
tlv_tree = add_protocol_subtree(&sub_tlv_info, ett_reg_rsp_message_tree, sub_tree, proto_mac_mgmt_msg_reg_rsp_decoder, tvb, this_offset, sub_tlv_len, "CID Update Encodings Connection Info");
/* Decode the DSC_RSP subTLV's */
call_dissector(dsc_rsp_handle, tvb_new_subset_length(tvb, sub_tlv_offset, sub_tlv_len), pinfo, tlv_tree);
break;
default:
add_tlv_subtree(&sub_tlv_info, sub_tree, hf_tlv_type, tvb, this_offset, ENC_NA);
break;
}
this_offset = sub_tlv_len + sub_tlv_offset;
}
break;
case REG_RSP_TLV_T_28_HO_SYSTEM_RESOURCE_RETAIN_TIME:
tlv_item = add_tlv_subtree(&tlv_info, reg_rsp_tree, hf_reg_rsp_system_resource_retain_time, tvb, offset, ENC_BIG_ENDIAN);
if (include_cor2_changes) {
proto_item_append_text(tlv_item, " (in units of 100 milliseconds)");
} else {
proto_item_append_text(tlv_item, " (multiple of 100 milliseconds)");
}
break;
case DSx_UPLINK_FLOW:
/* display Uplink Service Flow Encodings info */
/* add subtree */
tlv_tree = add_protocol_subtree(&tlv_info, ett_mac_mgmt_msg_reg_rsp_decoder, reg_rsp_tree, proto_mac_mgmt_msg_reg_rsp_decoder, tvb, offset, tlv_len, "Uplink Service Flow Encodings");
/* decode and display the DL Service Flow Encodings */
wimax_service_flow_encodings_decoder(tvb_new_subset_length(tvb, tlv_offset, tlv_len), pinfo, tlv_tree);
break;
case DSx_DOWNLINK_FLOW:
/* display Downlink Service Flow Encodings info */
/* add subtree */
tlv_tree = add_protocol_subtree(&tlv_info, ett_mac_mgmt_msg_reg_rsp_decoder, reg_rsp_tree, proto_mac_mgmt_msg_reg_rsp_decoder, tvb, offset, tlv_len, "Downlink Service Flow Encodings");
/* decode and display the DL Service Flow Encodings */
wimax_service_flow_encodings_decoder(tvb_new_subset_length(tvb, tlv_offset, tlv_len), pinfo, tlv_tree);
break;
case HMAC_TUPLE: /* Table 348d */
/* decode and display the HMAC Tuple */
tlv_tree = add_protocol_subtree(&tlv_info, ett_mac_mgmt_msg_reg_rsp_decoder, reg_rsp_tree, proto_mac_mgmt_msg_reg_rsp_decoder, tvb, offset, tlv_len, "HMAC Tuple");
wimax_hmac_tuple_decoder(tlv_tree, tvb, offset+2, 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_reg_rsp_decoder, reg_rsp_tree, proto_mac_mgmt_msg_reg_rsp_decoder, tvb, offset, tlv_len, "CMAC Tuple");
wimax_cmac_tuple_decoder(tlv_tree, tvb, offset+2, tlv_len);
break;
case SHORT_HMAC_TUPLE:
case SHORT_HMAC_TUPLE_COR2:
if ((!include_cor2_changes && (tlv_type == SHORT_HMAC_TUPLE)) ||
(include_cor2_changes && (tlv_type == SHORT_HMAC_TUPLE_COR2))) {
/* decode and display the Short HMAC Tuple */
tlv_tree = add_protocol_subtree(&tlv_info, ett_mac_mgmt_msg_reg_rsp_decoder, reg_rsp_tree, proto_mac_mgmt_msg_reg_rsp_decoder, tvb, offset, tlv_len, "Short HMAC Tuple");
wimax_short_hmac_tuple_decoder(tlv_tree, tvb, tlv_offset, tlv_len);
} else {
/* Unknown TLV Type */
add_tlv_subtree(&tlv_info, reg_rsp_tree, hf_tlv_type, tvb, offset, ENC_NA);
}
break;
case VENDOR_SPECIFIC_INFO:
case VENDOR_ID_ENCODING:
case MAC_VERSION_ENCODING:
wimax_common_tlv_encoding_decoder(tvb_new_subset_length(tvb, offset, (tvb_len - offset)), pinfo, reg_rsp_tree);
break;
default:
add_tlv_subtree(&tlv_info, reg_rsp_tree, hf_tlv_type, tvb, offset, ENC_NA);
break;
}
offset = tlv_len + tlv_offset;
} /* end of TLV process while loop */
if (!hmac_found)
proto_item_append_text(reg_rsp_tree, " (HMAC Tuple is missing !)");
}
return tvb_captured_length(tvb);
}
/* Register Wimax Mac Payload Protocol and Dissector */
void proto_register_mac_mgmt_msg_reg_rsp(void)
{
/* REG-RSP fields display */
static hf_register_info hf[] =
{
{
&hf_reg_invalid_tlv,
{
"Invalid TLV", "wmx.reg_rsp.invalid_tlv",
FT_BYTES, BASE_NONE, NULL, 0, NULL, HFILL
}
},
{
&hf_reg_rsp_new_cid_after_ho,
{
"New CID after handover to new BS", "wmx.reg_rsp.new_cid_after_ho",
FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL
}
},
{
&hf_reg_rsp_status,
{
"Response", "wmx.reg_rsp.response",
FT_UINT8, BASE_HEX, VALS(vals_reg_rsp_status), 0x0, NULL, HFILL
}
},
{
&hf_reg_rsp_secondary_mgmt_cid,
{
"Secondary Management CID", "wmx.reg_rsp.secondary_mgmt_cid",
FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL
}
},
{
&hf_reg_total_provisioned_sf,
{
"Total Number of Provisional Service Flow", "wmx.reg_rsp.total_provisional_sf",
FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL
}
},
{
&hf_reg_rsp_service_flow_id,
{
"Service flow ID", "wmx.reg_rsp.service_flow_id",
FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL
}
},
{
&hf_reg_rsp_system_resource_retain_time,
{
"System Resource Retain Time", "wmx.reg_rsp.system_resource_retain_time",
FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL
}
},
{
&hf_tlv_type,
{
"Unknown TLV Type", "wmx.reg_rsp.unknown_tlv_type",
FT_BYTES, BASE_NONE, NULL, 0x00, NULL, HFILL
}
},
#if 0
{
&hf_tlv_value,
{
"Value", "wmx.reg_rsp.tlv_value",
FT_BYTES, BASE_NONE, NULL, 0x00, NULL, HFILL
}
}
#endif
};
/* Setup protocol subtree array */
static gint *ett[] =
{
&ett_mac_mgmt_msg_reg_rsp_decoder,
&ett_reg_rsp_message_tree
};
proto_mac_mgmt_msg_reg_rsp_decoder = proto_register_protocol (
"WiMax REG-RSP Messages", /* name */
"WiMax REG-RSP", /* short name */
"wmx.reg_rsp" /* abbrev */
);
proto_register_field_array(proto_mac_mgmt_msg_reg_rsp_decoder, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
reg_rsp_handle = register_dissector("mac_mgmt_msg_reg_rsp_handler", dissect_mac_mgmt_msg_reg_rsp_decoder, proto_mac_mgmt_msg_reg_rsp_decoder);
}
void proto_reg_handoff_mac_mgmt_msg_reg_rsp(void)
{
dsc_rsp_handle = find_dissector("mac_mgmt_msg_dsc_rsp_handler");
dissector_add_uint("wmx.mgmtmsg", MAC_MGMT_MSG_REG_RSP, reg_rsp_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:
*/
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