/* Decode PMC-RSP messages. */ void dissect_mac_mgmt_msg_pmc_rsp_decoder(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) { guint offset = 0; guint tvb_len, payload_type; proto_item *pmc_rsp_item = NULL; proto_tree *pmc_rsp_tree = NULL; guint8 pwr_control_mode; gint8 value; gfloat power_change; UNREFERENCED_PARAMETER(pinfo); /* Ensure the right payload type */ payload_type = tvb_get_guint8(tvb, 0); if(payload_type != MAC_MGMT_MSG_PMC_RSP) { return; } if (tree) { /* we are being asked for details */ /* Get the tvb reported length */ tvb_len = tvb_reported_length(tvb); /* display MAC payload type PMC-RSP */ pmc_rsp_item = proto_tree_add_protocol_format(tree, proto_mac_mgmt_msg_pmc_rsp_decoder, tvb, 0, tvb_len, "MAC Management Message, PMC-RSP (64)"); /* add MAC PMC RSP subtree */ pmc_rsp_tree = proto_item_add_subtree(pmc_rsp_item, ett_mac_mgmt_msg_pmc_decoder); /* display the Message Type */ proto_tree_add_item(pmc_rsp_tree, hf_pmc_rsp_message_type, tvb, offset, 1, FALSE); offset ++; /* display the Power Control Mode Change */ if (include_cor2_changes) proto_tree_add_item(pmc_rsp_tree, hf_pmc_req_pwr_control_mode_change_cor2, tvb, offset, 2, FALSE); else proto_tree_add_item(pmc_rsp_tree, hf_pmc_req_pwr_control_mode_change, tvb, offset, 2, FALSE); /* display the Power Adjust start frame */ proto_tree_add_item(pmc_rsp_tree, hf_pmc_rsp_start_frame, tvb, offset, 2, FALSE); pwr_control_mode = 0xC0 & tvb_get_guint8(tvb, offset); offset++; value = (gint8)tvb_get_guint8(tvb, offset); power_change = (float)0.25 * value; /* 0.25dB incr */ /* Check if Power Control Mode is 0 */ if (pwr_control_mode == 0) { /* display the amount of power change requested */ proto_tree_add_float_format_value(pmc_rsp_tree, hf_pmc_rsp_power_adjust, tvb, offset, 1, power_change, " %.2f dB", power_change); } else { /* display the amount of MS power change requested */ proto_tree_add_float_format_value(pmc_rsp_tree, hf_pmc_rsp_offset_BS_per_MS, tvb, offset, 1, power_change, " %.2f dB", power_change); } } }
/* Decode RNG-RSP messages. */ void dissect_mac_mgmt_msg_rng_rsp_decoder(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) { proto_item *ranging_status_item = NULL; proto_item *dl_freq_override_item = NULL; proto_item *ss_mac_address_item = NULL; proto_item *frame_number_item = NULL; proto_item *opportunity_number_item = NULL; guint offset = 0; guint tlv_offset; guint tvb_len, payload_type; proto_item *rng_rsp_item = NULL; proto_item *tlv_item = NULL; proto_tree *rng_rsp_tree = NULL; proto_tree *sub_tree = NULL; proto_tree *tlv_tree = NULL; 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; float timing_adjust; float power_level_adjust; gint offset_freq_adjust; /* Ensure the right payload type */ payload_type = tvb_get_guint8(tvb, offset); if(payload_type != MAC_MGMT_MSG_RNG_RSP) { return; } if (tree) { /* we are being asked for details */ /* Get the tvb reported length */ tvb_len = tvb_reported_length(tvb); /* display MAC payload type RNG-RSP */ rng_rsp_item = proto_tree_add_protocol_format(tree, proto_mac_mgmt_msg_rng_rsp_decoder, tvb, offset, tvb_len, "MAC Management Message, RNG-RSP (5)"); /* add MAC RNG-RSP subtree */ rng_rsp_tree = proto_item_add_subtree(rng_rsp_item, ett_mac_mgmt_msg_rng_rsp_decoder); /* display the Message Type */ proto_tree_add_item(rng_rsp_tree, hf_rng_rsp_message_type, tvb, offset, 1, FALSE); proto_tree_add_item(rng_rsp_tree, hf_rng_req_reserved, tvb, 1, 1, FALSE); offset += 2; 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, "RNG-RSP TLV error"); proto_tree_add_item(rng_rsp_tree, hf_rng_invalid_tlv, tvb, offset, (tvb_len - offset), FALSE); break; } /* get the offset to the TLV data */ tlv_offset = offset + get_tlv_value_offset(&tlv_info); switch (tlv_type) { case RNG_RSP_TIMING_ADJUST: { sub_tree = add_protocol_subtree(&tlv_info, ett_rng_rsp_message_tree, rng_rsp_tree, proto_mac_mgmt_msg_rng_rsp_decoder, tvb, tlv_offset, tlv_len, "Timing Adjust (%u byte(s))", tlv_len); timing_adjust = (float)(gint32)tvb_get_ntohl(tvb, tlv_offset) / 4; tlv_item = proto_tree_add_float_format_value(sub_tree, hf_rng_rsp_timing_adjust, tvb, tlv_offset, 4, timing_adjust, " %.2f modulation symbols", timing_adjust); if ((timing_adjust < -2) || (timing_adjust > 2)) proto_item_append_text(tlv_item, " (during periodic ranging shall not exceed +- 2)"); break; } case RNG_RSP_POWER_LEVEL_ADJUST: { sub_tree = add_protocol_subtree(&tlv_info, ett_rng_rsp_message_tree, rng_rsp_tree, proto_mac_mgmt_msg_rng_rsp_decoder, tvb, tlv_offset, tlv_len, "Power Level Adjust (%u byte(s))", tlv_len); power_level_adjust = (float)(gint8)tvb_get_guint8(tvb, tlv_offset) / 4; proto_tree_add_float_format_value(sub_tree, hf_rng_rsp_power_level_adjust, tvb, tlv_offset, 1, power_level_adjust, " %.2f dB", power_level_adjust); break; } case RNG_RSP_OFFSET_FREQ_ADJUST: { sub_tree = add_protocol_subtree(&tlv_info, ett_rng_rsp_message_tree, rng_rsp_tree, proto_mac_mgmt_msg_rng_rsp_decoder, tvb, tlv_offset, tlv_len, "Offset Frequency Adjust (%u byte(s))", tlv_len); offset_freq_adjust = tvb_get_ntohl(tvb, tlv_offset); proto_tree_add_int_format_value(sub_tree, hf_rng_rsp_offset_freq_adjust, tvb, tlv_offset, 4, offset_freq_adjust, " %d Hz", offset_freq_adjust); break; } case RNG_RSP_RANGING_STATUS: sub_tree = add_tlv_subtree(&tlv_info, ett_rng_rsp_message_tree, rng_rsp_tree, hf_rng_rsp_ranging_status, tvb, tlv_offset, 1, FALSE); ranging_status_item = proto_tree_add_item(sub_tree, hf_rng_rsp_ranging_status, tvb, tlv_offset, 1, FALSE); break; case RNG_RSP_DL_FREQ_OVERRIDE: { sub_tree = add_tlv_subtree(&tlv_info, ett_rng_rsp_message_tree, rng_rsp_tree, hf_rng_rsp_dl_freq_override, tvb, tlv_offset, 4, FALSE); dl_freq_override_item = proto_tree_add_item(sub_tree, hf_rng_rsp_dl_freq_override, tvb, tlv_offset, 4, FALSE); proto_item_append_text(dl_freq_override_item, " kHz"); break; } case RNG_RSP_UL_CHANNEL_ID_OVERRIDE: sub_tree = add_tlv_subtree(&tlv_info, ett_rng_rsp_message_tree, rng_rsp_tree, hf_rng_rsp_ul_chan_id_override, tvb, tlv_offset, 1, FALSE); proto_tree_add_item(sub_tree, hf_rng_rsp_ul_chan_id_override, tvb, tlv_offset, 1, FALSE); break; case RNG_RSP_DL_OPERATIONAL_BURST_PROFILE: sub_tree = add_tlv_subtree(&tlv_info, ett_rng_rsp_message_tree, rng_rsp_tree, hf_rng_rsp_dl_operational_burst_profile, tvb, tlv_offset, 2, FALSE); proto_tree_add_item(sub_tree, hf_rng_rsp_dl_operational_burst_profile_diuc, tvb, tlv_offset, 2, FALSE); proto_tree_add_item(sub_tree, hf_rng_rsp_dl_operational_burst_profile_ccc, tvb, tlv_offset, 2, FALSE); break; case RNG_RSP_SS_MAC_ADDRESS: if (tlv_len == 6) { sub_tree = add_tlv_subtree(&tlv_info, ett_rng_rsp_message_tree, rng_rsp_tree, hf_rng_rsp_ss_mac_address, tvb, tlv_offset, 6, FALSE); ss_mac_address_item = proto_tree_add_item(sub_tree, hf_rng_rsp_ss_mac_address, tvb, tlv_offset, 6, FALSE); } else { sub_tree = add_tlv_subtree(&tlv_info, ett_rng_rsp_message_tree, rng_rsp_tree, hf_rng_invalid_tlv, tvb, tlv_offset, tlv_len, FALSE); proto_tree_add_item(sub_tree, hf_rng_rsp_ss_mac_address, tvb, tlv_offset, 6, FALSE); } break; case RNG_RSP_BASIC_CID: sub_tree = add_tlv_subtree(&tlv_info, ett_rng_rsp_message_tree, rng_rsp_tree, hf_rng_rsp_basic_cid, tvb, tlv_offset, 1, FALSE); proto_tree_add_item(sub_tree, hf_rng_rsp_basic_cid, tvb, tlv_offset, 2, FALSE); break; case RNG_RSP_PRIMARY_MGMT_CID: sub_tree = add_tlv_subtree(&tlv_info, ett_rng_rsp_message_tree, rng_rsp_tree, hf_rng_rsp_primary_mgmt_cid, tvb, tlv_offset, 1, FALSE); proto_tree_add_item(sub_tree, hf_rng_rsp_primary_mgmt_cid, tvb, tlv_offset, 2, FALSE); break; case RNG_RSP_AAS_BROADCAST_PERMISSION: sub_tree = add_tlv_subtree(&tlv_info, ett_rng_rsp_message_tree, rng_rsp_tree, hf_rng_rsp_broadcast, tvb, tlv_offset, 1, FALSE); proto_tree_add_item(sub_tree, hf_rng_rsp_broadcast, tvb, tlv_offset, 1, FALSE); break; case RNG_RSP_FRAME_NUMBER: sub_tree = add_tlv_subtree(&tlv_info, ett_rng_rsp_message_tree, rng_rsp_tree, hf_rng_rsp_frame_number, tvb, tlv_offset, 3, FALSE); frame_number_item = proto_tree_add_item(sub_tree, hf_rng_rsp_frame_number, tvb, tlv_offset, 3, FALSE); break; case RNG_RSP_OPPORTUNITY_NUMBER: sub_tree = add_tlv_subtree(&tlv_info, ett_rng_rsp_message_tree, rng_rsp_tree, hf_rng_rsp_opportunity_number, tvb, tlv_offset, 1, FALSE); opportunity_number_item = proto_tree_add_item(sub_tree, hf_rng_rsp_opportunity_number, tvb, tlv_offset, 1, FALSE); if (tvb_get_ntohl(tvb, tlv_offset) == 0) proto_item_append_text(opportunity_number_item, " (may not be 0!)"); break; case RNG_RSP_SERVICE_LEVEL_PREDICTION: sub_tree = add_tlv_subtree(&tlv_info, ett_rng_rsp_message_tree, rng_rsp_tree, hf_rng_rsp_service_level_prediction, tvb, tlv_offset, 1, FALSE); proto_tree_add_item(sub_tree, hf_rng_rsp_service_level_prediction, tvb, tlv_offset, 1, FALSE); break; case RNG_RSP_RESOURCE_RETAIN_FLAG: sub_tree = add_tlv_subtree(&tlv_info, ett_rng_rsp_message_tree, rng_rsp_tree, hf_rng_rsp_resource_retain_flag, tvb, tlv_offset, 1, FALSE); proto_tree_add_item(sub_tree, hf_rng_rsp_resource_retain_flag, tvb, tlv_offset, 1, FALSE); break; case RNG_RSP_HO_PROCESS_OPTIMIZATION: sub_tree = add_tlv_subtree(&tlv_info, ett_rng_rsp_message_tree, rng_rsp_tree, hf_rng_rsp_ho_process_optimization, tvb, tlv_offset, 2, FALSE); proto_tree_add_item(sub_tree, hf_rng_rsp_ho_process_optimization_0, tvb, tlv_offset, 2, FALSE); proto_tree_add_item(sub_tree, hf_rng_rsp_ho_process_optimization_1_2, tvb, tlv_offset, 2, FALSE); proto_tree_add_item(sub_tree, hf_rng_rsp_ho_process_optimization_3, tvb, tlv_offset, 2, FALSE); proto_tree_add_item(sub_tree, hf_rng_rsp_ho_process_optimization_4, tvb, tlv_offset, 2, FALSE); proto_tree_add_item(sub_tree, hf_rng_rsp_ho_process_optimization_5, tvb, tlv_offset, 2, FALSE); proto_tree_add_item(sub_tree, hf_rng_rsp_ho_process_optimization_6, tvb, tlv_offset, 2, FALSE); proto_tree_add_item(sub_tree, hf_rng_rsp_ho_process_optimization_7, tvb, tlv_offset, 2, FALSE); proto_tree_add_item(sub_tree, hf_rng_rsp_ho_process_optimization_8, tvb, tlv_offset, 2, FALSE); proto_tree_add_item(sub_tree, hf_rng_rsp_ho_process_optimization_9, tvb, tlv_offset, 2, FALSE); proto_tree_add_item(sub_tree, hf_rng_rsp_ho_process_optimization_10, tvb, tlv_offset, 2, FALSE); proto_tree_add_item(sub_tree, hf_rng_rsp_ho_process_optimization_11, tvb, tlv_offset, 2, FALSE); proto_tree_add_item(sub_tree, hf_rng_rsp_ho_process_optimization_12, tvb, tlv_offset, 2, FALSE); proto_tree_add_item(sub_tree, hf_rng_rsp_ho_process_optimization_13, tvb, tlv_offset, 2, FALSE); proto_tree_add_item(sub_tree, hf_rng_rsp_ho_process_optimization_14, tvb, tlv_offset, 2, FALSE); proto_tree_add_item(sub_tree, hf_rng_rsp_ho_process_optimization_15, tvb, tlv_offset, 2, FALSE); break; case RNG_RSP_SBC_RSP_ENCODINGS: sub_tree = add_protocol_subtree(&tlv_info, ett_rng_rsp_message_tree, rng_rsp_tree, proto_mac_mgmt_msg_rng_rsp_decoder, tvb, tlv_offset, tlv_len, "SBC-RSP Encodings (%u byte(s))", tlv_len); dissect_mac_mgmt_msg_sbc_rsp_decoder(tvb_new_subset(tvb, tlv_offset, tlv_len, tlv_len), pinfo, sub_tree); break; case RNG_RSP_REG_RSP_ENCODINGS: sub_tree = add_protocol_subtree(&tlv_info, ett_rng_rsp_message_tree, rng_rsp_tree, proto_mac_mgmt_msg_rng_rsp_decoder, tvb, tlv_offset, tlv_len, "REG-RSP Encodings (%u byte(s))", tlv_len); dissect_mac_mgmt_msg_reg_rsp_decoder(tvb_new_subset(tvb, tlv_offset, tlv_len, tlv_len), pinfo, sub_tree); break; /* Implemented message encoding 33 (Table 367 in IEEE 802.16e-2007) */ case RNG_RSP_DL_OP_BURST_PROFILE_OFDMA: sub_tree = add_tlv_subtree(&tlv_info, ett_rng_rsp_message_tree, rng_rsp_tree, hf_rng_rsp_dl_op_burst_profile_ofdma, tvb, tlv_offset, 2, FALSE); proto_tree_add_item(sub_tree, hf_rng_rsp_least_robust_diuc, tvb, tlv_offset, 2, FALSE); proto_tree_add_item(sub_tree, hf_rng_rsp_repetition_coding_indication, tvb, tlv_offset, 2, FALSE); proto_tree_add_item(sub_tree, hf_rng_rsp_config_change_count_of_dcd, tvb, tlv_offset, 2, FALSE); break; case RNG_RSP_HO_ID: sub_tree = add_tlv_subtree(&tlv_info, ett_rng_rsp_message_tree, rng_rsp_tree, hf_rng_rsp_ho_id, tvb, tlv_offset, 1, FALSE); proto_tree_add_item(sub_tree, hf_rng_rsp_ho_id, tvb, tlv_offset, 1, FALSE); break; case RNG_RSP_LOCATION_UPDATE_RESPONSE: sub_tree = add_tlv_subtree(&tlv_info, ett_rng_rsp_message_tree, rng_rsp_tree, hf_rng_rsp_location_update_response, tvb, tlv_offset, 1, FALSE); proto_tree_add_item(sub_tree, hf_rng_rsp_location_update_response, tvb, tlv_offset, 1, FALSE); break; case RNG_RSP_PAGING_INFORMATION: sub_tree = add_tlv_subtree(&tlv_info, ett_rng_rsp_message_tree, rng_rsp_tree, hf_rng_rsp_paging_information, tvb, tlv_offset, 5, FALSE); proto_tree_add_item(sub_tree, hf_rng_rsp_paging_cycle, tvb, tlv_offset, 2, FALSE); proto_tree_add_item(sub_tree, hf_rng_rsp_paging_offset, tvb, tlv_offset+2, 1, FALSE); proto_tree_add_item(sub_tree, hf_rng_rsp_paging_group_id, tvb, tlv_offset+3, 2, FALSE); break; case RNG_RSP_POWER_SAVING_CLASS_PARAMETERS: sub_tree = add_protocol_subtree(&tlv_info, ett_rng_rsp_message_tree, rng_rsp_tree, proto_mac_mgmt_msg_rng_rsp_decoder, tvb, tlv_offset, tlv_len, "Power Saving Class Parameters (%u byte(s))", tlv_len); dissect_power_saving_class(sub_tree, tlv_type, tvb, tlv_len, pinfo, tlv_offset); break; case RNG_RSP_SA_CHALLENGE_TUPLE: /* Display SA Challenge Tuple header */ sub_tree = add_protocol_subtree(&tlv_info, ett_rng_rsp_message_tree, rng_rsp_tree, proto_mac_mgmt_msg_rng_rsp_decoder, tvb, tlv_offset, tlv_len, "SA Challenge Tuple (%u byte(s))", tlv_len); /* add subtree */ /* 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(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, "RNG-RSP TLV error"); proto_tree_add_item(rng_rsp_tree, hf_rng_invalid_tlv, tvb, tlv_offset, (tvb_len - offset), FALSE); 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 RNG_RSP_SA_CHALLENGE_BS_RANDOM: tlv_tree = add_tlv_subtree(&sub_tlv_info, ett_rng_rsp_message_tree, sub_tree, hf_rng_rsp_bs_random, tvb, sub_tlv_offset, sub_tlv_len, FALSE); proto_tree_add_item(tlv_tree, hf_rng_rsp_bs_random, tvb, sub_tlv_offset, sub_tlv_len, FALSE); break; case RNG_RSP_SA_CHALLENGE_AKID: tlv_tree = add_tlv_subtree(&sub_tlv_info, ett_rng_rsp_message_tree, sub_tree, hf_rng_rsp_akid, tvb, sub_tlv_offset, sub_tlv_len, FALSE); proto_tree_add_item(tlv_tree, hf_rng_rsp_akid, tvb, sub_tlv_offset, sub_tlv_len, FALSE); break; default: tlv_tree = add_tlv_subtree(&sub_tlv_info, ett_rng_rsp_message_tree, sub_tree, hf_tlv_type, tvb, sub_tlv_offset, sub_tlv_len, FALSE); proto_tree_add_item(tlv_tree, hf_tlv_type, tvb, sub_tlv_offset, sub_tlv_len, FALSE); break; } this_offset = sub_tlv_len + sub_tlv_offset; } break; case DSx_UPLINK_FLOW: /* display Uplink Service Flow Encodings info */ /* add subtree */ sub_tree = add_protocol_subtree(&tlv_info, ett_mac_mgmt_msg_rng_rsp_decoder, rng_rsp_tree, proto_mac_mgmt_msg_rng_rsp_decoder, tvb, tlv_offset, tlv_len, "Uplink QOS Parameters (%u bytes)", tlv_len); /* decode and display the DL Service Flow Encodings */ wimax_service_flow_encodings_decoder(tvb_new_subset(tvb, tlv_offset, tlv_len, tlv_len), pinfo, sub_tree); break; case DSx_DOWNLINK_FLOW: /* display Downlink Service Flow Encodings info */ /* add subtree */ sub_tree = add_protocol_subtree(&tlv_info, ett_mac_mgmt_msg_rng_rsp_decoder, rng_rsp_tree, proto_mac_mgmt_msg_rng_rsp_decoder, tvb, tlv_offset, tlv_len, "Downlink QOS Parameters (%u bytes)", tlv_len); /* decode and display the DL Service Flow Encodings */ wimax_service_flow_encodings_decoder(tvb_new_subset(tvb, tlv_offset, tlv_len, tlv_len), pinfo, sub_tree); break; case RNG_RSP_RANGING_CODE_ATTRIBUTES: /* case SHORT_HMAC_TUPLE: */ sub_tree = add_tlv_subtree(&tlv_info, ett_rng_rsp_message_tree, rng_rsp_tree, hf_rng_rsp_ranging_subchan, tvb, tlv_offset, 4, FALSE); proto_tree_add_item(sub_tree, hf_rng_rsp_time_symbol_reference, tvb, tlv_offset, 4, FALSE); proto_tree_add_item(sub_tree, hf_rng_rsp_subchannel_reference, tvb, tlv_offset, 4, FALSE); proto_tree_add_item(sub_tree, hf_rng_rsp_ranging_code_index, tvb, tlv_offset, 4, FALSE); proto_tree_add_item(sub_tree, hf_rng_rsp_frame_number2, tvb, tlv_offset, 4, FALSE); break; case SHORT_HMAC_TUPLE_COR2: if (include_cor2_changes) { sub_tree = add_protocol_subtree(&tlv_info, ett_rng_rsp_message_tree, rng_rsp_tree, proto_mac_mgmt_msg_rng_rsp_decoder, tvb, tlv_offset, tlv_len, "Short HMAC Tuple (%u byte(s))", tlv_len); wimax_short_hmac_tuple_decoder(sub_tree, tvb, tlv_offset, tvb_len - offset); } else { /* Unknown TLV type */ sub_tree = add_tlv_subtree(&tlv_info, ett_rng_rsp_message_tree, rng_rsp_tree, hf_tlv_type, tvb, tlv_offset, 1, FALSE); proto_tree_add_item(sub_tree, hf_tlv_type, tvb, tlv_offset, tlv_len, FALSE); } break; default: sub_tree = add_tlv_subtree(&tlv_info, ett_rng_rsp_message_tree, rng_rsp_tree, hf_tlv_type, tvb, tlv_offset, 1, FALSE); proto_tree_add_item(sub_tree, hf_tlv_type, tvb, tlv_offset, tlv_len, FALSE); break; } offset = tlv_len + tlv_offset; } /* end of TLV process while loop */ if (ranging_status_item && dl_freq_override_item) proto_item_append_text(ranging_status_item, " (shall be set to 2 because Downlink Frequency Override is present)"); if (ss_mac_address_item && frame_number_item) { proto_item_append_text(frame_number_item, " (mutually exclusive with SS MAC Address!)"); proto_item_append_text(ss_mac_address_item, " (mutually exclusive with Frame Number!)"); } if (ss_mac_address_item && opportunity_number_item) { proto_item_append_text(opportunity_number_item, " (mutually exclusive with SS MAC Address!)"); proto_item_append_text(ss_mac_address_item, " (mutually exclusive with Initial Ranging Opportunity Number!)"); } if (!ranging_status_item) proto_item_append_text(rng_rsp_tree, " (Ranging status is missing!)"); } }
/* * Dissect 802.11 with a variable-length link-layer header and a pseudo- * header containing radio information. */ static int dissect_wlan_radio (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree, void *data) { struct ieee_802_11_phdr *phdr = (struct ieee_802_11_phdr *)data; proto_item *ti = NULL; proto_tree *radio_tree = NULL; float data_rate = 0.0f; gboolean have_data_rate = FALSE; gboolean has_short_preamble = FALSE; gboolean short_preamble = 1; guint frame_length = tvb_reported_length(tvb); /* length of 802.11 frame data */ /* durations in microseconds */ guint preamble = 0; /* duration of plcp */ guint duration = 0; /* duration of whole frame (plcp + mac data + any trailing parts) */ col_set_str(pinfo->cinfo, COL_PROTOCOL, "Radio"); col_clear(pinfo->cinfo, COL_INFO); /* Calculate the data rate, if we have the necessary data */ if (phdr->has_data_rate) { data_rate = phdr->data_rate * 0.5f; have_data_rate = TRUE; } if (phdr->has_signal_dbm) { col_add_fstr(pinfo->cinfo, COL_RSSI, "%d dBm", phdr->signal_dbm); } else if (phdr->has_signal_percent) { col_add_fstr(pinfo->cinfo, COL_RSSI, "%u%%", phdr->signal_percent); } if (tree) { ti = proto_tree_add_item(tree, proto_wlan_radio, tvb, 0, 0, ENC_NA); radio_tree = proto_item_add_subtree (ti, ett_wlan_radio); if (phdr->phy != PHDR_802_11_PHY_UNKNOWN) { proto_tree_add_uint(radio_tree, hf_wlan_radio_phy, tvb, 0, 0, phdr->phy); switch (phdr->phy) { case PHDR_802_11_PHY_11_FHSS: { struct ieee_802_11_fhss *info_fhss = &phdr->phy_info.info_11_fhss; if (info_fhss->has_hop_set) { proto_tree_add_uint(radio_tree, hf_wlan_radio_11_fhss_hop_set, tvb, 0, 0, info_fhss->hop_set); } if (info_fhss->has_hop_pattern) { proto_tree_add_uint(radio_tree, hf_wlan_radio_11_fhss_hop_pattern, tvb, 0, 0, info_fhss->hop_pattern); } if (info_fhss->has_hop_index) { proto_tree_add_uint(radio_tree, hf_wlan_radio_11_fhss_hop_index, tvb, 0, 0, info_fhss->hop_index); } break; } case PHDR_802_11_PHY_11B: { struct ieee_802_11b *info_b = &phdr->phy_info.info_11b; has_short_preamble = info_b->has_short_preamble; short_preamble = info_b->short_preamble; if (has_short_preamble) { proto_tree_add_boolean(radio_tree, hf_wlan_radio_short_preamble, tvb, 0, 0, short_preamble); } break; } case PHDR_802_11_PHY_11A: { struct ieee_802_11a *info_a = &phdr->phy_info.info_11a; if (info_a->has_channel_type) { proto_tree_add_uint(radio_tree, hf_wlan_radio_11a_channel_type, tvb, 0, 0, info_a->channel_type); } if (info_a->has_turbo_type) { proto_tree_add_uint(radio_tree, hf_wlan_radio_11a_turbo_type, tvb, 0, 0, info_a->turbo_type); } break; } case PHDR_802_11_PHY_11G: { struct ieee_802_11g *info_g = &phdr->phy_info.info_11g; has_short_preamble = info_g->has_short_preamble; short_preamble = info_g->short_preamble; if (has_short_preamble) { proto_tree_add_boolean(radio_tree, hf_wlan_radio_short_preamble, tvb, 0, 0, short_preamble); } if (info_g->has_mode) { proto_tree_add_uint(radio_tree, hf_wlan_radio_11g_mode, tvb, 0, 0, info_g->mode); } break; } case PHDR_802_11_PHY_11N: { struct ieee_802_11n *info_n = &phdr->phy_info.info_11n; guint bandwidth_40; if (info_n->has_mcs_index) { proto_tree_add_uint(radio_tree, hf_wlan_radio_11n_mcs_index, tvb, 0, 0, info_n->mcs_index); } if (info_n->has_bandwidth) { proto_tree_add_uint(radio_tree, hf_wlan_radio_11n_bandwidth, tvb, 0, 0, info_n->bandwidth); } if (info_n->has_short_gi) { proto_tree_add_boolean(radio_tree, hf_wlan_radio_11n_short_gi, tvb, 0, 0, info_n->short_gi); } if (info_n->has_greenfield) { proto_tree_add_boolean(radio_tree, hf_wlan_radio_11n_greenfield, tvb, 0, 0, info_n->greenfield); } if (info_n->has_fec) { proto_tree_add_uint(radio_tree, hf_wlan_radio_11n_fec, tvb, 0, 0, info_n->fec); } if (info_n->has_stbc_streams) { proto_tree_add_uint(radio_tree, hf_wlan_radio_11n_stbc_streams, tvb, 0, 0, info_n->stbc_streams); } if (info_n->has_ness) { proto_tree_add_uint(radio_tree, hf_wlan_radio_11n_ness, tvb, 0, 0, info_n->ness); } /* * If we have all the fields needed to look up the data rate, * do so. */ if (info_n->has_mcs_index && info_n->has_bandwidth && info_n->has_short_gi) { bandwidth_40 = (info_n->bandwidth == PHDR_802_11_BANDWIDTH_40_MHZ) ? 1 : 0; if (info_n->mcs_index <= MAX_MCS_INDEX) { data_rate = ieee80211_htrate(info_n->mcs_index, bandwidth_40, info_n->short_gi); have_data_rate = TRUE; } } } break; case PHDR_802_11_PHY_11AC: { struct ieee_802_11ac *info_ac = &phdr->phy_info.info_11ac; gboolean can_calculate_rate; guint bandwidth = 0; guint i; if (info_ac->has_stbc) { proto_tree_add_boolean(radio_tree, hf_wlan_radio_11ac_stbc, tvb, 0, 0, info_ac->stbc); } if (info_ac->has_txop_ps_not_allowed) { proto_tree_add_boolean(radio_tree, hf_wlan_radio_11ac_txop_ps_not_allowed, tvb, 0, 0, info_ac->txop_ps_not_allowed); } if (info_ac->has_short_gi) { can_calculate_rate = TRUE; /* well, if we also have the bandwidth */ proto_tree_add_boolean(radio_tree, hf_wlan_radio_11ac_short_gi, tvb, 0, 0, info_ac->short_gi); } else { can_calculate_rate = FALSE; /* unknown GI length */ } if (info_ac->has_short_gi_nsym_disambig) { proto_tree_add_boolean(radio_tree, hf_wlan_radio_11ac_short_gi_nsym_disambig, tvb, 0, 0, info_ac->short_gi_nsym_disambig); } if (info_ac->has_ldpc_extra_ofdm_symbol) { proto_tree_add_boolean(radio_tree, hf_wlan_radio_11ac_ldpc_extra_ofdm_symbol, tvb, 0, 0, info_ac->ldpc_extra_ofdm_symbol); } if (info_ac->has_beamformed) { proto_tree_add_boolean(radio_tree, hf_wlan_radio_11ac_beamformed, tvb, 0, 0, info_ac->beamformed); } if (info_ac->has_bandwidth) { if (info_ac->bandwidth < G_N_ELEMENTS(ieee80211_vht_bw2rate_index)) bandwidth = ieee80211_vht_bw2rate_index[info_ac->bandwidth]; else can_calculate_rate = FALSE; /* unknown bandwidth */ proto_tree_add_uint(radio_tree, hf_wlan_radio_11ac_bandwidth, tvb, 0, 0, info_ac->bandwidth); } else { can_calculate_rate = FALSE; /* no bandwidth */ } for (i = 0; i < 4; i++) { if (info_ac->nss[i] != 0) { proto_item *it; proto_tree *user_tree; it = proto_tree_add_item(radio_tree, hf_wlan_radio_11ac_user, tvb, 0, 0, ENC_NA); proto_item_append_text(it, " %d: MCS %u", i, info_ac->mcs[i]); user_tree = proto_item_add_subtree(it, ett_wlan_radio_11ac_user); it = proto_tree_add_uint(user_tree, hf_wlan_radio_11ac_mcs, tvb, 0, 0, info_ac->mcs[i]); if (info_ac->mcs[i] > MAX_MCS_VHT_INDEX) { proto_item_append_text(it, " (invalid)"); } else { proto_item_append_text(it, " (%s %s)", ieee80211_vhtinfo[info_ac->mcs[i]].modulation, ieee80211_vhtinfo[info_ac->mcs[i]].coding_rate); } proto_tree_add_uint(user_tree, hf_wlan_radio_11ac_nss, tvb, 0, 0, info_ac->nss[i]); /* * If we don't know whether space-time block coding is being * used, we don't know the number of space-time streams. */ if (info_ac->has_stbc) { guint nsts; if (info_ac->stbc) nsts = 2 * info_ac->nss[i]; else nsts = info_ac->nss[i]; proto_tree_add_uint(user_tree, hf_wlan_radio_11ac_nsts, tvb, 0, 0, nsts); } if (info_ac->has_fec) { proto_tree_add_uint(user_tree, hf_wlan_radio_11ac_fec, tvb, 0, 0, (info_ac->fec >> i) & 0x01); } /* * If we can calculate the data rate for this user, do so. */ if (can_calculate_rate && info_ac->mcs[i] <= MAX_MCS_VHT_INDEX) { data_rate = ieee80211_vhtrate(info_ac->mcs[i], bandwidth, info_ac->short_gi) * info_ac->nss[i]; if (data_rate != 0.0f) { proto_tree_add_float_format_value(user_tree, hf_wlan_radio_data_rate, tvb, 0, 0, data_rate, "%.1f Mb/s", data_rate); } } } } if (info_ac->has_group_id) { proto_tree_add_uint(radio_tree, hf_wlan_radio_11ac_gid, tvb, 0, 0, info_ac->group_id); } if (info_ac->has_partial_aid) { proto_tree_add_uint(radio_tree, hf_wlan_radio_11ac_p_aid, tvb, 0, 0, info_ac->partial_aid); } } break; }