diff options
Diffstat (limited to 'plugins/epan/wimax/msg_fpc.c')
| -rw-r--r-- | plugins/epan/wimax/msg_fpc.c | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/plugins/epan/wimax/msg_fpc.c b/plugins/epan/wimax/msg_fpc.c new file mode 100644 index 0000000..42b5014 --- /dev/null +++ b/plugins/epan/wimax/msg_fpc.c @@ -0,0 +1,166 @@ +/* msg_fpc.c + * WiMax MAC Management FPC 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" + +#include <epan/packet.h> +#include "wimax_mac.h" + + +void proto_register_mac_mgmt_msg_fpc(void); +void proto_reg_handoff_mac_mgmt_msg_fpc(void); + +static dissector_handle_t fpc_handle; + +static gint proto_mac_mgmt_msg_fpc_decoder = -1; + +static gint ett_mac_mgmt_msg_fpc_decoder = -1; + +/* FPC fields */ +static gint hf_fpc_number_of_stations = -1; +static gint hf_fpc_basic_cid = -1; +static gint hf_fpc_power_adjust = -1; +static gint hf_fpc_power_measurement_frame = -1; +/* static gint hf_fpc_invalid_tlv = -1; */ + + +/* Decode FPC messages. */ +static int dissect_mac_mgmt_msg_fpc_decoder(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, void* data _U_) +{ + guint offset = 0; + guint i; + guint number_stations; + guint tvb_len; + proto_item *fpc_item; + proto_tree *fpc_tree; + gint8 value; + gfloat power_change; + + { /* we are being asked for details */ + + /* Get the tvb reported length */ + tvb_len = tvb_reported_length(tvb); + /* display MAC payload type FPC */ + fpc_item = proto_tree_add_protocol_format(tree, proto_mac_mgmt_msg_fpc_decoder, tvb, 0, -1, "MAC Management Message, FPC"); + /* add MAC FPC subtree */ + fpc_tree = proto_item_add_subtree(fpc_item, ett_mac_mgmt_msg_fpc_decoder); + + /* display the Number of stations */ + proto_tree_add_item(fpc_tree, hf_fpc_number_of_stations, tvb, offset, 1, ENC_BIG_ENDIAN); + + number_stations = tvb_get_guint8(tvb, offset); + offset++; + for (i = 0; ((i < number_stations) && (offset >= tvb_len)); i++ ) { + /* display the Basic CID*/ + proto_tree_add_item(fpc_tree, hf_fpc_basic_cid, tvb, offset, 2, ENC_BIG_ENDIAN); + offset += 2; + + /* display the Power adjust value */ + value = tvb_get_gint8(tvb, offset); + power_change = (float)0.25 * value; /* 0.25dB incr */ + + /* display the Power adjust value in dB */ + proto_tree_add_float_format_value(fpc_tree, hf_fpc_power_adjust, tvb, offset, 1, power_change, " %.2f dB", power_change); + offset++; + + /* display the Power measurement frame */ + proto_tree_add_item(fpc_tree, hf_fpc_power_measurement_frame, tvb, offset, 1, ENC_BIG_ENDIAN); + offset++; + } + } + return tvb_captured_length(tvb); +} + +/* Register Wimax Mac Payload Protocol and Dissector */ +void proto_register_mac_mgmt_msg_fpc(void) +{ + /* FPC fields display */ + static hf_register_info hf[] = + { + { + &hf_fpc_basic_cid, + { + "Basic CID", "wmx.fpc.basic_cid", + FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL + } + }, +#if 0 + { + &hf_fpc_invalid_tlv, + { + "Invalid TLV", "wmx.fpc.invalid_tlv", + FT_BYTES, BASE_NONE, NULL, 0, NULL, HFILL + } + }, +#endif + { + &hf_fpc_number_of_stations, + { + "Number of stations", "wmx.fpc.number_stations", + FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL + } + }, + { + &hf_fpc_power_adjust, + { + "Power Adjust", "wmx.fpc.power_adjust", + FT_FLOAT, BASE_NONE, NULL, 0x0, "Signed change in power level (incr of 0.25dB) that the SS shall apply to its current power setting", HFILL + } + }, + { + &hf_fpc_power_measurement_frame, + { + "Power measurement frame", "wmx.fpc.power_measurement_frame", + FT_INT8, BASE_DEC, NULL, 0x0, "The 8 LSB of the frame number in which the BS measured the power corrections referred to in the message", HFILL + } + } + }; + + /* Setup protocol subtree array */ + static gint *ett[] = + { + &ett_mac_mgmt_msg_fpc_decoder, + }; + + proto_mac_mgmt_msg_fpc_decoder = proto_register_protocol ( + "WiMax FPC Message", /* name */ + "WiMax FPC (fpc)", /* short name */ + "wmx.fpc" /* abbrev */ + ); + + proto_register_field_array(proto_mac_mgmt_msg_fpc_decoder, hf, array_length(hf)); + proto_register_subtree_array(ett, array_length(ett)); + fpc_handle = register_dissector("mac_mgmt_msg_fpc_handler", dissect_mac_mgmt_msg_fpc_decoder, proto_mac_mgmt_msg_fpc_decoder); +} + +void +proto_reg_handoff_mac_mgmt_msg_fpc(void) +{ + dissector_add_uint("wmx.mgmtmsg", MAC_MGMT_MSG_FPC, fpc_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: + */ |