diff options
Diffstat (limited to 'epan/dissectors/packet-ieee80211-radio.c')
-rw-r--r-- | epan/dissectors/packet-ieee80211-radio.c | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/epan/dissectors/packet-ieee80211-radio.c b/epan/dissectors/packet-ieee80211-radio.c new file mode 100644 index 0000000000..a5f47f09b0 --- /dev/null +++ b/epan/dissectors/packet-ieee80211-radio.c @@ -0,0 +1,140 @@ +/* packet-ieee80211-radio.c + * Routines for pseudo 802.11 header dissection + * + * $Id$ + * + * Wireshark - Network traffic analyzer + * By Gerald Combs <gerald@wireshark.org> + * Copyright 1998 Gerald Combs + * + * Copied from README.developer + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + */ + +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif + +#include <epan/packet.h> +#include "packet-ieee80211.h" + +static dissector_handle_t ieee80211_handle; + +static int proto_radio = -1; + +/* ************************************************************************* */ +/* Header field info values for radio information */ +/* ************************************************************************* */ +static int hf_data_rate = -1; +static int hf_channel = -1; +static int hf_signal_strength = -1; + +static gint ett_radio = -1; + +/* + * Dissect 802.11 with a variable-length link-layer header and a pseudo- + * header containing radio information. + */ +static void +dissect_radio (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree) +{ + proto_item *ti = NULL; + proto_tree *radio_tree = NULL; + + col_set_str(pinfo->cinfo, COL_PROTOCOL, "Radio"); + col_clear(pinfo->cinfo, COL_INFO); + + /* Add the radio information to the column information */ + col_add_fstr(pinfo->cinfo, COL_TX_RATE, "%u.%u", + pinfo->pseudo_header->ieee_802_11.data_rate / 2, + pinfo->pseudo_header->ieee_802_11.data_rate & 1 ? 5 : 0); + /* XX - this is a percentage, not a dBm or normalized or raw RSSI */ + col_add_fstr(pinfo->cinfo, COL_RSSI, "%u", + pinfo->pseudo_header->ieee_802_11.signal_level); + + if (tree) { + ti = proto_tree_add_item(tree, proto_radio, tvb, 0, 0, ENC_BIG_ENDIAN); + radio_tree = proto_item_add_subtree (ti, ett_radio); + + proto_tree_add_uint64_format(radio_tree, hf_data_rate, tvb, 0, 0, + (guint64)pinfo->pseudo_header->ieee_802_11.data_rate * 500000, + "Data Rate: %u.%u Mb/s", + pinfo->pseudo_header->ieee_802_11.data_rate / 2, + pinfo->pseudo_header->ieee_802_11.data_rate & 1 ? 5 : 0); + + proto_tree_add_uint(radio_tree, hf_channel, tvb, 0, 0, + pinfo->pseudo_header->ieee_802_11.channel); + + proto_tree_add_uint_format(radio_tree, hf_signal_strength, tvb, 0, 0, + pinfo->pseudo_header->ieee_802_11.signal_level, + "Signal Strength: %u%%", + pinfo->pseudo_header->ieee_802_11.signal_level); + } + + /* dissect the 802.11 header next */ + pinfo->current_proto = "IEEE 802.11"; + call_dissector(ieee80211_handle, tvb, pinfo, tree); +} + +static hf_register_info hf_radio[] = { + {&hf_data_rate, + {"Data Rate", "wlan.data_rate", FT_UINT64, BASE_DEC, NULL, 0, + "Data rate (b/s)", HFILL }}, + + {&hf_channel, + {"Channel", "wlan.channel", FT_UINT8, BASE_DEC, NULL, 0, + "802.11 channel number that this frame was sent/received on", HFILL }}, + + {&hf_signal_strength, + {"Signal Strength", "wlan.signal_strength", FT_UINT8, BASE_DEC, NULL, 0, + "Signal strength (Percentage)", HFILL }} +}; + +static gint *tree_array[] = { + &ett_radio +}; + +void proto_register_ieee80211_radio(void) +{ + proto_radio = proto_register_protocol("802.11 radio information", "Radio", + "radio"); + proto_register_field_array(proto_radio, hf_radio, array_length(hf_radio)); + proto_register_subtree_array(tree_array, array_length(tree_array)); +} + +void proto_reg_handoff_ieee80211_radio(void) +{ + dissector_handle_t radio_handle; + + /* Register handoff to radio-header dissectors */ + radio_handle = create_dissector_handle(dissect_radio, proto_radio); + dissector_add_uint("wtap_encap", WTAP_ENCAP_IEEE_802_11_WITH_RADIO, + radio_handle); + ieee80211_handle = find_dissector("wlan"); +} + +/* + * Editor modelines + * + * Local Variables: + * c-basic-offset: 2 + * tab-width: 8 + * indent-tabs-mode: nil + * End: + * + * ex: set shiftwidth=2 tabstop=8 expandtab: + * :indentSize=2:tabSize=8:noTabs=true: + */ |