diff options
Diffstat (limited to 'plugins/epan/wimax/msg_dsd.c')
| -rw-r--r-- | plugins/epan/wimax/msg_dsd.c | 279 |
1 files changed, 279 insertions, 0 deletions
diff --git a/plugins/epan/wimax/msg_dsd.c b/plugins/epan/wimax/msg_dsd.c new file mode 100644 index 00000000..6f7c4c07 --- /dev/null +++ b/plugins/epan/wimax/msg_dsd.c @@ -0,0 +1,279 @@ +/* msg_dsd.c + * WiMax MAC Management DSD-REQ/RSP Messages decoder + * + * Copyright (c) 2007 by Intel Corporation. + * + * Author: Lu Pan <lu.pan@intel.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 DEBUG +*/ + +#include <epan/packet.h> +#include "wimax_tlv.h" +#include "wimax_mac.h" +#include "wimax_utils.h" + +void proto_register_mac_mgmt_msg_dsd(void); +void proto_reg_handoff_mac_mgmt_msg_dsd(void); + +static dissector_handle_t dsd_req_handle; +static dissector_handle_t dsd_rsp_handle; + +static gint proto_mac_mgmt_msg_dsd_decoder = -1; +static gint ett_mac_mgmt_msg_dsd_req_decoder = -1; +static gint ett_mac_mgmt_msg_dsd_rsp_decoder = -1; +/* static gint ett_dsd_ul_sfe_decoder = -1; */ +/* static gint ett_dsd_dl_sfe_decoder = -1; */ +/* static gint ett_dsd_hmac_tuple = -1; */ +/* static gint ett_dsd_cmac_tuple = -1; */ + +/* fix fields */ +static gint hf_dsd_transaction_id = -1; +static gint hf_dsd_service_flow_id = -1; +static gint hf_dsd_confirmation_code = -1; +static gint hf_dsd_invalid_tlv = -1; +static gint hf_dsd_unknown_type = -1; + + +static int dissect_mac_mgmt_msg_dsd_req_decoder(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_) +{ + guint offset = 0; + guint tvb_len, tlv_len, tlv_value_offset; + gint tlv_type; + proto_item *dsd_item; + proto_tree *dsd_tree; + proto_tree *tlv_tree = NULL; + tlv_info_t tlv_info; + + { /* we are being asked for details */ + /* Get the tvb reported length */ + tvb_len = tvb_reported_length(tvb); + /* display MAC message type */ + dsd_item = proto_tree_add_protocol_format(tree, proto_mac_mgmt_msg_dsd_decoder, tvb, offset, -1, + "Dynamic Service Deletion Request (DSD-REQ)"); + /* add MAC DSx subtree */ + dsd_tree = proto_item_add_subtree(dsd_item, ett_mac_mgmt_msg_dsd_req_decoder); + /* Decode and display the DSD message */ + /* display the Transaction ID */ + proto_tree_add_item(dsd_tree, hf_dsd_transaction_id, tvb, offset, 2, ENC_BIG_ENDIAN); + /* move to next field */ + offset += 2; + /* display the Service Flow ID */ + proto_tree_add_item(dsd_tree, hf_dsd_service_flow_id, tvb, offset, 4, ENC_BIG_ENDIAN); + /* move to next field */ + offset += 4; + /* process DSD REQ message TLV Encode Information */ + while(offset < tvb_len) + { /* get the TLV information */ + 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, "DSD-REQ TLV error"); + proto_tree_add_item(dsd_tree, hf_dsd_invalid_tlv, tvb, offset, (tvb_len - offset), ENC_NA); + break; + } + /* get the TLV value offset */ + tlv_value_offset = get_tlv_value_offset(&tlv_info); +#ifdef DEBUG /* for debug only */ + proto_tree_add_protocol_format(dsd_tree, proto_mac_mgmt_msg_dsd_decoder, tvb, offset, tlv_len + tlv_value_offset, "DSD-REQ TLV Type: %u (%u bytes, offset=%u, tvb_len=%u)", tlv_type, tlv_len + tlv_value_offset, offset, tvb_len); +#endif + /* process TLV */ + 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_dsd_req_decoder, dsd_tree, proto_mac_mgmt_msg_dsd_decoder, tvb, offset, tlv_len, "HMAC Tuple"); + wimax_hmac_tuple_decoder(tlv_tree, tvb, offset+tlv_value_offset, tlv_len); + break; + case CMAC_TUPLE: /* Table 348b */ + /* decode and display the CMAC Tuple */ + tlv_tree = add_protocol_subtree(&tlv_info, ett_mac_mgmt_msg_dsd_req_decoder, dsd_tree, proto_mac_mgmt_msg_dsd_decoder, tvb, offset, tlv_len, "CMAC Tuple"); + wimax_cmac_tuple_decoder(tlv_tree, tvb, offset+tlv_value_offset, tlv_len); + break; + default: + /* display the unknown tlv in hex */ + add_tlv_subtree(&tlv_info, dsd_tree, hf_dsd_unknown_type, tvb, offset, ENC_NA); + break; + } + offset += (tlv_len+tlv_value_offset); + } /* end of while loop */ + } + return tvb_captured_length(tvb); +} + +static int dissect_mac_mgmt_msg_dsd_rsp_decoder(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_) +{ + guint offset = 0; + guint tvb_len, tlv_len, tlv_value_offset; + gint tlv_type; + proto_item *dsd_item; + proto_tree *dsd_tree; + proto_tree *tlv_tree = NULL; + tlv_info_t tlv_info; + + { /* we are being asked for details */ + /* Get the tvb reported length */ + tvb_len = tvb_reported_length(tvb); + /* display MAC message type */ + dsd_item = proto_tree_add_protocol_format(tree, proto_mac_mgmt_msg_dsd_decoder, tvb, offset, -1, + "Dynamic Service Deletion Response (DSD-RSP)"); + /* add MAC DSx subtree */ + dsd_tree = proto_item_add_subtree(dsd_item, ett_mac_mgmt_msg_dsd_rsp_decoder); + /* Decode and display the DSD message */ + /* display the Transaction ID */ + proto_tree_add_item(dsd_tree, hf_dsd_transaction_id, tvb, offset, 2, ENC_BIG_ENDIAN); + /* move to next field */ + offset += 2; + /* display the Confirmation Code */ + proto_tree_add_item(dsd_tree, hf_dsd_confirmation_code, tvb, offset, 1, ENC_BIG_ENDIAN); + /* move to next field */ + offset++; + /* display the Service Flow ID */ + proto_tree_add_item(dsd_tree, hf_dsd_service_flow_id, tvb, offset, 4, ENC_BIG_ENDIAN); + /* move to next field */ + offset += 4; + /* process DSD RSP message TLV Encode Information */ + while(offset < tvb_len) + { /* get the TLV information */ + 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, "DSD RSP TLV error"); + proto_tree_add_item(dsd_tree, hf_dsd_invalid_tlv, tvb, offset, (tvb_len - offset), ENC_NA); + break; + } + /* get the TLV value offset */ + tlv_value_offset = get_tlv_value_offset(&tlv_info); +#ifdef DEBUG /* for debug only */ + proto_tree_add_protocol_format(dsd_tree, proto_mac_mgmt_msg_dsd_decoder, tvb, offset, tlv_len + tlv_value_offset, "DSD-RSP TLV Type: %u (%u bytes, offset=%u, tvb_len=%u)", tlv_type, tlv_len + tlv_value_offset, offset, tvb_len); +#endif + /* process TLV */ + 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_dsd_req_decoder, dsd_tree, proto_mac_mgmt_msg_dsd_decoder, tvb, offset, tlv_len, "HMAC Tuple"); + wimax_hmac_tuple_decoder(tlv_tree, tvb, offset+tlv_value_offset, tlv_len); + break; + case CMAC_TUPLE: /* Table 348b */ + /* decode and display the CMAC Tuple */ + tlv_tree = add_protocol_subtree(&tlv_info, ett_mac_mgmt_msg_dsd_req_decoder, dsd_tree, proto_mac_mgmt_msg_dsd_decoder, tvb, offset, tlv_len, "CMAC Tuple"); + wimax_cmac_tuple_decoder(tlv_tree, tvb, offset+tlv_value_offset, tlv_len); + break; + default: + add_tlv_subtree(&tlv_info, dsd_tree, hf_dsd_unknown_type, tvb, offset, ENC_NA); + break; + } + offset += (tlv_len+tlv_value_offset); + } /* end of while loop */ + } + return tvb_captured_length(tvb); +} + +/* Register Wimax Mac Payload Protocol and Dissector */ +void proto_register_mac_mgmt_msg_dsd(void) +{ + /* DSx display */ + static hf_register_info hf[] = + { + { + &hf_dsd_confirmation_code, + { + "Confirmation code", "wmx.dsd.confirmation_code", + FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL + } + }, + { + &hf_dsd_service_flow_id, + { + "Service Flow ID", "wmx.dsd.service_flow_id", + FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL + } + }, + { + &hf_dsd_transaction_id, + { + "Transaction ID", "wmx.dsd.transaction_id", + FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL + } + }, + { + &hf_dsd_invalid_tlv, + { + "Invalid TLV", "wmx.dsd.invalid_tlv", + FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL + } + }, + { + &hf_dsd_unknown_type, + { + "Unknown type", "wmx.dsd.unknown_type", + FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL + } + } + }; + + /* Setup protocol subtree array */ + static gint *ett[] = + { + &ett_mac_mgmt_msg_dsd_req_decoder, + &ett_mac_mgmt_msg_dsd_rsp_decoder, + /* &ett_dsd_ul_sfe_decoder, */ + /* &ett_dsd_dl_sfe_decoder, */ + /* &ett_dsd_hmac_tuple, */ + /* &ett_dsd_cmac_tuple, */ + }; + + proto_mac_mgmt_msg_dsd_decoder = proto_register_protocol ( + "WiMax DSD Messages", /* name */ + "WiMax DSD", /* short name */ + "wmx.dsd" /* abbrev */ + ); + + proto_register_field_array(proto_mac_mgmt_msg_dsd_decoder, hf, array_length(hf)); + proto_register_subtree_array(ett, array_length(ett)); + + dsd_req_handle = register_dissector("mac_mgmt_msg_dsd_req_handler", dissect_mac_mgmt_msg_dsd_req_decoder, proto_mac_mgmt_msg_dsd_decoder); + dsd_rsp_handle = register_dissector("mac_mgmt_msg_dsd_rsp_handler", dissect_mac_mgmt_msg_dsd_rsp_decoder, proto_mac_mgmt_msg_dsd_decoder); +} + +void +proto_reg_handoff_mac_mgmt_msg_dsd(void) +{ + dissector_add_uint("wmx.mgmtmsg", MAC_MGMT_MSG_DSD_REQ, dsd_req_handle); + dissector_add_uint("wmx.mgmtmsg", MAC_MGMT_MSG_DSD_RSP, dsd_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: + */ |