2011-10-12 05:08:51 +00:00
|
|
|
/* packet-ieee80211-prism.c
|
|
|
|
* Routines for Prism monitoring mode 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
|
2012-06-28 23:18:38 +00:00
|
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
2011-10-12 05:08:51 +00:00
|
|
|
*/
|
|
|
|
|
2012-09-20 02:03:38 +00:00
|
|
|
#include "config.h"
|
2011-10-12 05:08:51 +00:00
|
|
|
|
|
|
|
#include <epan/packet.h>
|
|
|
|
#include "packet-ieee80211.h"
|
|
|
|
|
|
|
|
#define SHORT_STR 256
|
|
|
|
|
|
|
|
static dissector_handle_t wlancap_handle;
|
|
|
|
static dissector_handle_t ieee80211_handle;
|
|
|
|
|
|
|
|
static int proto_prism = -1;
|
|
|
|
|
|
|
|
/* Prism radio header */
|
|
|
|
|
|
|
|
static int hf_ieee80211_prism_msgcode = -1;
|
|
|
|
static int hf_ieee80211_prism_msglen = -1;
|
|
|
|
static int hf_ieee80211_prism_devname = -1;
|
|
|
|
static int hf_ieee80211_prism_did = -1;
|
|
|
|
static int hf_ieee80211_prism_did_type = -1;
|
|
|
|
static int hf_ieee80211_prism_did_status = -1;
|
|
|
|
static int hf_ieee80211_prism_did_length = -1;
|
|
|
|
static int hf_ieee80211_prism_did_hosttime = -1;
|
|
|
|
static int hf_ieee80211_prism_did_mactime = -1;
|
|
|
|
static int hf_ieee80211_prism_did_channel = -1;
|
|
|
|
static int hf_ieee80211_prism_did_rssi = -1;
|
|
|
|
static int hf_ieee80211_prism_did_sq = -1;
|
|
|
|
static int hf_ieee80211_prism_did_signal = -1;
|
|
|
|
static int hf_ieee80211_prism_did_noise = -1;
|
|
|
|
static int hf_ieee80211_prism_did_rate = -1;
|
|
|
|
static int hf_ieee80211_prism_did_istx = -1;
|
|
|
|
static int hf_ieee80211_prism_did_frmlen = -1;
|
|
|
|
static int hf_ieee80211_prism_did_unknown = -1;
|
|
|
|
|
|
|
|
static gint ett_prism = -1;
|
|
|
|
static gint ett_prism_did = -1;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Prism II-based wlan devices have a monitoring mode that sticks
|
|
|
|
* a proprietary header on each packet with lots of good
|
|
|
|
* information. This file is responsible for decoding that
|
|
|
|
* data.
|
|
|
|
*
|
|
|
|
* Support by Tim Newsham
|
|
|
|
*
|
|
|
|
* A value from the header.
|
|
|
|
*
|
|
|
|
* It appears from looking at the linux-wlan-ng and Prism II HostAP
|
|
|
|
* drivers, and various patches to the orinoco_cs drivers to add
|
|
|
|
* Prism headers, that:
|
|
|
|
*
|
|
|
|
* the "did" identifies what the value is (i.e., what it's the value
|
|
|
|
* of);
|
|
|
|
*
|
|
|
|
* "status" is 0 if the value is present or 1 if it's absent;
|
|
|
|
*
|
|
|
|
* "len" is the length of the value (always 4, in that code);
|
|
|
|
*
|
|
|
|
* "data" is the value of the data (or 0 if not present).
|
|
|
|
*
|
|
|
|
* Note: all of those values are in the *host* byte order of the machine
|
|
|
|
* on which the capture was written.
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Header attached during Prism monitor mode.
|
|
|
|
*
|
|
|
|
* At least according to one paper I've seen, the Prism 2.5 chip set
|
|
|
|
* provides:
|
|
|
|
*
|
|
|
|
* RSSI (receive signal strength indication) is "the total power
|
|
|
|
* received by the radio hardware while receiving the frame,
|
|
|
|
* including signal, interfereence, and background noise";
|
|
|
|
*
|
|
|
|
* "silence value" is "the total power observed just before the
|
|
|
|
* start of the frame".
|
|
|
|
*
|
|
|
|
* None of the drivers I looked at supply the "rssi" or "sq" value,
|
|
|
|
* but they do supply "signal" and "noise" values, along with a "rate"
|
|
|
|
* value that's 1/5 of the raw value from what is presumably a raw
|
|
|
|
* HFA384x frame descriptor, with the comment "set to 802.11 units",
|
|
|
|
* which presumably means the units are 500 Kb/s.
|
|
|
|
*
|
|
|
|
* I infer from the current NetBSD "wi" driver that "signal" and "noise"
|
|
|
|
* are adjusted dBm values, with the dBm value having 100 added to it
|
|
|
|
* for the Prism II cards (although the NetBSD code has an XXX comment
|
|
|
|
* for the #define for WI_PRISM_DBM_OFFSET) and 149 (with no XXX comment)
|
|
|
|
* for the Orinoco cards.
|
|
|
|
*
|
|
|
|
* XXX - what about other drivers that supply Prism headers, such as
|
|
|
|
* old versions of the MadWifi driver?
|
2012-10-14 22:38:58 +00:00
|
|
|
*
|
|
|
|
* I'm not sure where these DID values come from, but they work with
|
|
|
|
* at least one capture file. However, in
|
|
|
|
*
|
|
|
|
* http://ask.wireshark.org/questions/14963/how-to-get-the-field-did-unknown-4041-into-the-column
|
|
|
|
*
|
|
|
|
* somebody reports a capture where *different* DID values, corresponding
|
|
|
|
* to
|
|
|
|
*
|
|
|
|
* http://home.martin.cc/linux/prism
|
|
|
|
*
|
|
|
|
* are used (and that's not a byte-order issue, as those values are *not*
|
|
|
|
* just byte-swapped versions of the other values).
|
2011-10-12 05:08:51 +00:00
|
|
|
*/
|
|
|
|
|
|
|
|
#define PRISM_HEADER_LENGTH 144 /* Default Prism Header Length */
|
2012-10-14 22:38:58 +00:00
|
|
|
|
|
|
|
/*
|
2012-10-17 01:23:13 +00:00
|
|
|
* Message code values.
|
|
|
|
*
|
|
|
|
* Some Prism captures have headers that begin with 0x00000044; those
|
|
|
|
* captures have the non-home.martin.cc values for the DID types,
|
|
|
|
* while a capture with 0x00000041 as the message code have the
|
|
|
|
* home.martin.cc values for the DID types, and the home.martin.cc
|
|
|
|
* page has 0x00000041 as the message code.
|
2012-10-14 22:38:58 +00:00
|
|
|
*/
|
2012-10-17 01:23:13 +00:00
|
|
|
#define PRISM_TYPE1_MSGCODE 0x00000044 /* Monitor Frame */
|
|
|
|
#define PRISM_TYPE2_MSGCODE 0x00000041
|
2012-10-14 22:38:58 +00:00
|
|
|
|
|
|
|
/*
|
2012-10-17 01:23:13 +00:00
|
|
|
* DID codes - PRISM_TYPE1_xxx are the non-home.martin.cc values, and
|
|
|
|
* PRISM_TYPE2_xxx are the home.martin.cc values.
|
2012-10-14 22:38:58 +00:00
|
|
|
*/
|
2012-10-17 01:23:13 +00:00
|
|
|
#define PRISM_TYPE1_HOSTTIME 0x00010044 /* Host time element */
|
|
|
|
#define PRISM_TYPE2_HOSTTIME 0x00001041
|
|
|
|
#define PRISM_TYPE1_MACTIME 0x00020044 /* Mac time element */
|
|
|
|
#define PRISM_TYPE2_MACTIME 0x00002041
|
|
|
|
#define PRISM_TYPE1_CHANNEL 0x00030044 /* Channel element */
|
|
|
|
#define PRISM_TYPE2_CHANNEL 0x00003041
|
|
|
|
#define PRISM_TYPE1_RSSI 0x00040044 /* RSSI element */
|
|
|
|
#define PRISM_TYPE2_RSSI 0x00004041
|
|
|
|
#define PRISM_TYPE1_SQ 0x00050044 /* SQ element */
|
|
|
|
#define PRISM_TYPE2_SQ 0x00005041
|
|
|
|
#define PRISM_TYPE1_SIGNAL 0x00060044 /* Signal element */
|
|
|
|
#define PRISM_TYPE2_SIGNAL 0x00006041
|
|
|
|
#define PRISM_TYPE1_NOISE 0x00070044 /* Noise element */
|
|
|
|
#define PRISM_TYPE2_NOISE 0x00007041
|
|
|
|
#define PRISM_TYPE1_RATE 0x00080044 /* Rate element */
|
|
|
|
#define PRISM_TYPE2_RATE 0x00008041
|
|
|
|
#define PRISM_TYPE1_ISTX 0x00090044 /* Is Tx frame */
|
|
|
|
#define PRISM_TYPE2_ISTX 0x00009041
|
|
|
|
#define PRISM_TYPE1_FRMLEN 0x000A0044 /* Frame length */
|
|
|
|
#define PRISM_TYPE2_FRMLEN 0x0000A041
|
2011-10-12 05:08:51 +00:00
|
|
|
|
|
|
|
static const value_string prism_did_vals[] =
|
|
|
|
{
|
2012-10-17 01:23:13 +00:00
|
|
|
{ PRISM_TYPE1_HOSTTIME, "Host Time" },
|
|
|
|
{ PRISM_TYPE2_HOSTTIME, "Host Time" },
|
|
|
|
{ PRISM_TYPE1_MACTIME, "Mac Time" },
|
|
|
|
{ PRISM_TYPE2_MACTIME, "Mac Time" },
|
|
|
|
{ PRISM_TYPE1_CHANNEL, "Channel" },
|
|
|
|
{ PRISM_TYPE2_CHANNEL, "Channel" },
|
|
|
|
{ PRISM_TYPE1_RSSI, "RSSI" },
|
|
|
|
{ PRISM_TYPE2_RSSI, "RSSI" },
|
|
|
|
{ PRISM_TYPE1_SQ, "SQ" },
|
|
|
|
{ PRISM_TYPE2_SQ, "SQ" },
|
|
|
|
{ PRISM_TYPE1_SIGNAL, "Signal" },
|
|
|
|
{ PRISM_TYPE2_SIGNAL, "Signal" },
|
|
|
|
{ PRISM_TYPE1_NOISE, "Noise" },
|
|
|
|
{ PRISM_TYPE2_NOISE, "Noise" },
|
|
|
|
{ PRISM_TYPE1_RATE, "Rate" },
|
|
|
|
{ PRISM_TYPE2_RATE, "Rate" },
|
|
|
|
{ PRISM_TYPE1_ISTX, "Is Tx" },
|
|
|
|
{ PRISM_TYPE2_ISTX, "Is Tx" },
|
|
|
|
{ PRISM_TYPE1_FRMLEN, "Frame Length" },
|
|
|
|
{ PRISM_TYPE2_FRMLEN, "Frame Length" },
|
2011-10-12 05:08:51 +00:00
|
|
|
{ 0, NULL}
|
|
|
|
};
|
|
|
|
|
2012-10-14 22:38:58 +00:00
|
|
|
/*
|
|
|
|
* The header file mentioned above says 0 means "supplied" and 1 means
|
|
|
|
* "not supplied". I haven't seen a capture file with anything other
|
|
|
|
* than 0 there.
|
|
|
|
*/
|
2011-10-12 05:08:51 +00:00
|
|
|
static const value_string prism_status_vals[] =
|
|
|
|
{
|
2012-10-14 22:38:58 +00:00
|
|
|
{ 0, "Supplied" },
|
|
|
|
{ 1, "Not Supplied" },
|
2011-10-12 05:08:51 +00:00
|
|
|
{ 0, NULL}
|
|
|
|
};
|
|
|
|
|
|
|
|
static const value_string prism_istx_vals[] =
|
|
|
|
{
|
|
|
|
{ 0, "Rx Packet" },
|
|
|
|
{ 1, "Tx Packet" },
|
|
|
|
{ 0, NULL}
|
|
|
|
};
|
|
|
|
|
|
|
|
static void
|
|
|
|
prism_rate_base_custom(gchar *result, guint32 rate)
|
|
|
|
{
|
|
|
|
g_snprintf(result, ITEM_LABEL_LENGTH, "%u.%u", rate /2, rate & 1 ? 5 : 0);
|
|
|
|
}
|
|
|
|
|
|
|
|
static gchar *
|
|
|
|
prism_rate_return(guint32 rate)
|
|
|
|
{
|
|
|
|
gchar *result=NULL;
|
|
|
|
result = ep_alloc(SHORT_STR);
|
|
|
|
result[0] = '\0';
|
|
|
|
prism_rate_base_custom(result, rate);
|
|
|
|
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void
|
|
|
|
capture_prism(const guchar *pd, int offset, int len, packet_counts *ld)
|
|
|
|
{
|
|
|
|
guint32 cookie;
|
|
|
|
|
|
|
|
if (!BYTES_ARE_IN_FRAME(offset, len, 4)) {
|
|
|
|
ld->other++;
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Some captures with DLT_PRISM have the AVS WLAN header */
|
|
|
|
cookie = pntohl(pd);
|
|
|
|
if ((cookie == WLANCAP_MAGIC_COOKIE_V1) ||
|
|
|
|
(cookie == WLANCAP_MAGIC_COOKIE_V2)) {
|
|
|
|
capture_wlancap(pd, offset, len, ld);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Prism header */
|
|
|
|
if (!BYTES_ARE_IN_FRAME(offset, len, PRISM_HEADER_LENGTH)) {
|
|
|
|
ld->other++;
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
offset += PRISM_HEADER_LENGTH;
|
|
|
|
|
|
|
|
/* 802.11 header follows */
|
|
|
|
capture_ieee80211(pd, offset, len, ld);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
dissect_prism(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
|
|
|
|
{
|
|
|
|
proto_tree *prism_tree = NULL, *prism_did_tree = NULL;
|
|
|
|
proto_item *ti = NULL, *ti_did = NULL;
|
|
|
|
tvbuff_t *next_tvb;
|
|
|
|
int offset;
|
|
|
|
guint32 msgcode, msglen, did;
|
2012-10-14 22:38:58 +00:00
|
|
|
guint16 status;
|
2011-10-12 05:08:51 +00:00
|
|
|
guint8 *devname;
|
|
|
|
|
|
|
|
offset = 0;
|
|
|
|
did = 0;
|
|
|
|
|
2012-10-17 01:23:13 +00:00
|
|
|
/* handle the AVS header */
|
2011-10-12 05:08:51 +00:00
|
|
|
msgcode = tvb_get_ntohl(tvb, offset);
|
|
|
|
if ((msgcode == WLANCAP_MAGIC_COOKIE_V1) ||
|
|
|
|
(msgcode == WLANCAP_MAGIC_COOKIE_V2)) {
|
|
|
|
call_dissector(wlancap_handle, tvb, pinfo, tree);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2012-10-17 01:23:13 +00:00
|
|
|
/*
|
|
|
|
* If we don't see a valid message type, assume the Prism or AVS
|
|
|
|
* header was omitted and just hand off to the 802.11 dissector;
|
|
|
|
* at least one capture has AVS headers on some packets and no
|
|
|
|
* radio headers on others (incoming vs. outgoing?).
|
|
|
|
*
|
|
|
|
* XXX - check for both byte orders and use that to determine
|
|
|
|
* the byte order of the fields in the Prism header?
|
|
|
|
*/
|
|
|
|
msgcode = tvb_get_letohl(tvb, offset);
|
|
|
|
if ((msgcode != PRISM_TYPE1_MSGCODE) &&
|
|
|
|
(msgcode != PRISM_TYPE2_MSGCODE)) {
|
|
|
|
call_dissector(ieee80211_handle, tvb, pinfo, tree);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2011-10-12 05:08:51 +00:00
|
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "Prism");
|
|
|
|
col_clear(pinfo->cinfo, COL_INFO);
|
|
|
|
|
|
|
|
if(tree) {
|
2011-10-21 02:10:19 +00:00
|
|
|
ti = proto_tree_add_item(tree, proto_prism, tvb, 0, 144, ENC_NA);
|
2011-10-12 05:08:51 +00:00
|
|
|
prism_tree = proto_item_add_subtree(ti, ett_prism);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Message Code */
|
|
|
|
if(tree) {
|
|
|
|
proto_tree_add_item(prism_tree, hf_ieee80211_prism_msgcode, tvb, offset, 4, ENC_LITTLE_ENDIAN);
|
|
|
|
}
|
|
|
|
msgcode = tvb_get_letohl(tvb, offset);
|
|
|
|
offset += 4;
|
|
|
|
|
|
|
|
/* Message Length */
|
|
|
|
if(tree) {
|
|
|
|
proto_tree_add_item(prism_tree, hf_ieee80211_prism_msglen, tvb, offset, 4, ENC_LITTLE_ENDIAN);
|
|
|
|
}
|
|
|
|
msglen = tvb_get_letohl(tvb, offset);
|
|
|
|
offset += 4;
|
|
|
|
|
|
|
|
/* Device Name */
|
|
|
|
if(tree) {
|
2011-10-15 18:46:26 +00:00
|
|
|
proto_tree_add_item(prism_tree, hf_ieee80211_prism_devname, tvb, offset, 16, ENC_ASCII|ENC_NA);
|
2011-10-12 05:08:51 +00:00
|
|
|
}
|
|
|
|
devname = tvb_get_ephemeral_string(tvb, offset, 16);
|
|
|
|
offset += 16;
|
|
|
|
|
|
|
|
col_add_fstr(pinfo->cinfo, COL_INFO, "Device: %s, Message 0x%x, Length %d", devname, msgcode, msglen);
|
|
|
|
|
|
|
|
|
|
|
|
while(offset < PRISM_HEADER_LENGTH)
|
|
|
|
{
|
|
|
|
/* DID */
|
|
|
|
if(tree) {
|
|
|
|
ti_did = proto_tree_add_item(prism_tree, hf_ieee80211_prism_did, tvb, offset, 12, ENC_NA);
|
|
|
|
prism_did_tree = proto_item_add_subtree(ti_did, ett_prism_did);
|
|
|
|
|
|
|
|
proto_tree_add_item(prism_did_tree, hf_ieee80211_prism_did_type, tvb, offset, 4, ENC_LITTLE_ENDIAN);
|
|
|
|
did = tvb_get_letohl(tvb, offset);
|
|
|
|
proto_item_append_text(ti_did, " %s", val_to_str(did, prism_did_vals, "Unknown %x") );
|
|
|
|
}
|
|
|
|
offset += 4;
|
|
|
|
|
|
|
|
|
|
|
|
/* Status */
|
2012-10-14 22:38:58 +00:00
|
|
|
status = tvb_get_letohs(tvb, offset);
|
2011-10-12 05:08:51 +00:00
|
|
|
if(tree) {
|
|
|
|
proto_tree_add_item(prism_did_tree, hf_ieee80211_prism_did_status, tvb, offset, 2, ENC_LITTLE_ENDIAN);
|
|
|
|
}
|
|
|
|
offset += 2;
|
|
|
|
|
|
|
|
/* Length */
|
|
|
|
if(tree) {
|
|
|
|
proto_tree_add_item(prism_did_tree, hf_ieee80211_prism_did_length, tvb, offset, 2, ENC_LITTLE_ENDIAN);
|
|
|
|
}
|
|
|
|
offset += 2;
|
|
|
|
|
2012-10-14 22:38:58 +00:00
|
|
|
/* Data, if present... */
|
|
|
|
if (status == 0) {
|
|
|
|
switch(did){
|
2012-10-17 01:23:13 +00:00
|
|
|
case PRISM_TYPE1_HOSTTIME:
|
|
|
|
case PRISM_TYPE2_HOSTTIME:
|
2012-10-14 22:38:58 +00:00
|
|
|
if(tree){
|
|
|
|
proto_tree_add_item(prism_did_tree, hf_ieee80211_prism_did_hosttime, tvb, offset, 4, ENC_LITTLE_ENDIAN);
|
|
|
|
proto_item_append_text(ti_did, " %d", tvb_get_letohl(tvb, offset) );
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
|
2012-10-17 01:23:13 +00:00
|
|
|
case PRISM_TYPE1_MACTIME:
|
|
|
|
case PRISM_TYPE2_MACTIME:
|
2012-10-14 22:38:58 +00:00
|
|
|
if(tree){
|
|
|
|
proto_tree_add_item(prism_did_tree, hf_ieee80211_prism_did_mactime, tvb, offset, 4, ENC_LITTLE_ENDIAN);
|
|
|
|
proto_item_append_text(ti_did, " %d", tvb_get_letohl(tvb, offset) );
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
|
2012-10-17 01:23:13 +00:00
|
|
|
case PRISM_TYPE1_CHANNEL:
|
|
|
|
case PRISM_TYPE2_CHANNEL:
|
2012-10-14 22:38:58 +00:00
|
|
|
if(tree){
|
|
|
|
proto_tree_add_item(prism_did_tree, hf_ieee80211_prism_did_channel, tvb, offset, 4, ENC_LITTLE_ENDIAN);
|
|
|
|
proto_item_append_text(ti_did, " %d", tvb_get_letohl(tvb, offset) );
|
|
|
|
}
|
|
|
|
col_add_fstr(pinfo->cinfo, COL_FREQ_CHAN, "%u", tvb_get_letohl(tvb, offset));
|
|
|
|
break;
|
|
|
|
|
2012-10-17 01:23:13 +00:00
|
|
|
case PRISM_TYPE1_RSSI:
|
|
|
|
case PRISM_TYPE2_RSSI:
|
2012-10-14 22:38:58 +00:00
|
|
|
if(tree){
|
|
|
|
proto_tree_add_item(prism_did_tree, hf_ieee80211_prism_did_rssi, tvb, offset, 4, ENC_LITTLE_ENDIAN);
|
|
|
|
proto_item_append_text(ti_did, " 0x%x", tvb_get_letohl(tvb, offset) );
|
|
|
|
}
|
|
|
|
col_add_fstr(pinfo->cinfo, COL_RSSI, "%d", tvb_get_letohl(tvb, offset));
|
|
|
|
break;
|
|
|
|
|
2012-10-17 01:23:13 +00:00
|
|
|
case PRISM_TYPE1_SQ:
|
|
|
|
case PRISM_TYPE2_SQ:
|
2012-10-14 22:38:58 +00:00
|
|
|
if(tree){
|
|
|
|
proto_tree_add_item(prism_did_tree, hf_ieee80211_prism_did_sq, tvb, offset, 4, ENC_LITTLE_ENDIAN);
|
|
|
|
proto_item_append_text(ti_did, " 0x%x", tvb_get_letohl(tvb, offset) );
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
|
2012-10-17 01:23:13 +00:00
|
|
|
case PRISM_TYPE1_SIGNAL:
|
|
|
|
case PRISM_TYPE2_SIGNAL:
|
2012-10-14 22:38:58 +00:00
|
|
|
if(tree){
|
|
|
|
proto_tree_add_item(prism_did_tree, hf_ieee80211_prism_did_signal, tvb, offset, 4, ENC_LITTLE_ENDIAN);
|
|
|
|
proto_item_append_text(ti_did, " 0x%x", tvb_get_letohl(tvb, offset) );
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
|
2012-10-17 01:23:13 +00:00
|
|
|
case PRISM_TYPE1_NOISE:
|
|
|
|
case PRISM_TYPE2_NOISE:
|
2012-10-14 22:38:58 +00:00
|
|
|
if(tree){
|
|
|
|
proto_tree_add_item(prism_did_tree, hf_ieee80211_prism_did_noise, tvb, offset, 4, ENC_LITTLE_ENDIAN);
|
|
|
|
proto_item_append_text(ti_did, " 0x%x", tvb_get_letohl(tvb, offset) );
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
|
2012-10-17 01:23:13 +00:00
|
|
|
case PRISM_TYPE1_RATE:
|
|
|
|
case PRISM_TYPE2_RATE:
|
2012-10-14 22:38:58 +00:00
|
|
|
if(tree){
|
|
|
|
proto_tree_add_item(prism_did_tree, hf_ieee80211_prism_did_rate, tvb, offset, 4, ENC_LITTLE_ENDIAN);
|
|
|
|
proto_item_append_text(ti_did, " %s Mb/s", prism_rate_return(tvb_get_letohl(tvb, offset)) );
|
|
|
|
}
|
|
|
|
col_add_fstr(pinfo->cinfo, COL_TX_RATE, "%s", prism_rate_return(tvb_get_letohl(tvb, offset)) );
|
|
|
|
break;
|
|
|
|
|
2012-10-17 01:23:13 +00:00
|
|
|
case PRISM_TYPE1_ISTX:
|
|
|
|
case PRISM_TYPE2_ISTX:
|
2012-10-14 22:38:58 +00:00
|
|
|
if(tree){
|
|
|
|
proto_tree_add_item(prism_did_tree, hf_ieee80211_prism_did_istx, tvb, offset, 4, ENC_LITTLE_ENDIAN);
|
|
|
|
proto_item_append_text(ti_did, " 0x%x", tvb_get_letohl(tvb, offset) );
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
|
2012-10-17 01:23:13 +00:00
|
|
|
case PRISM_TYPE1_FRMLEN:
|
|
|
|
case PRISM_TYPE2_FRMLEN:
|
2012-10-14 22:38:58 +00:00
|
|
|
if(tree){
|
|
|
|
proto_tree_add_item(prism_did_tree, hf_ieee80211_prism_did_frmlen, tvb, offset, 4, ENC_LITTLE_ENDIAN);
|
|
|
|
proto_item_append_text(ti_did, " %d", tvb_get_letohl(tvb, offset) );
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
|
|
|
|
default:
|
|
|
|
if(tree){
|
|
|
|
proto_tree_add_item(prism_did_tree, hf_ieee80211_prism_did_unknown, tvb, offset, 4, ENC_LITTLE_ENDIAN);
|
|
|
|
}
|
|
|
|
break;
|
2011-10-12 05:08:51 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
offset += 4;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* dissect the 802.11 header next */
|
|
|
|
next_tvb = tvb_new_subset_remaining(tvb, offset);
|
|
|
|
call_dissector(ieee80211_handle, next_tvb, pinfo, tree);
|
|
|
|
}
|
|
|
|
|
|
|
|
static hf_register_info hf_prism[] = {
|
|
|
|
/* Prism-specific header fields
|
|
|
|
XXX - make as many of these generic as possible. */
|
|
|
|
{ &hf_ieee80211_prism_msgcode,
|
2012-10-17 01:23:13 +00:00
|
|
|
{"Message Code", "prism.msgcode", FT_UINT32, BASE_HEX, NULL, 0x0,
|
2011-10-12 05:08:51 +00:00
|
|
|
NULL, HFILL }},
|
|
|
|
|
|
|
|
{ &hf_ieee80211_prism_msglen,
|
|
|
|
{"Message Length", "prism.msglen", FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
|
|
NULL, HFILL }},
|
|
|
|
|
|
|
|
{ &hf_ieee80211_prism_devname,
|
|
|
|
{"Device Name", "prism.devname", FT_STRING, BASE_NONE, NULL, 0x0,
|
|
|
|
NULL, HFILL }},
|
|
|
|
|
|
|
|
{ &hf_ieee80211_prism_did,
|
|
|
|
{"DID", "prism.did.type", FT_NONE, BASE_NONE, NULL, 0x0,
|
|
|
|
NULL, HFILL }},
|
|
|
|
|
|
|
|
{ &hf_ieee80211_prism_did_type,
|
|
|
|
{"DID", "prism.did.type", FT_UINT32, BASE_HEX, VALS(prism_did_vals), 0x0,
|
|
|
|
"Different ID for each parameter", HFILL }},
|
|
|
|
|
|
|
|
{ &hf_ieee80211_prism_did_status,
|
|
|
|
{"Status", "prism.did.status", FT_UINT16, BASE_DEC, VALS(prism_status_vals), 0x0,
|
|
|
|
"Supplied by the driver or not", HFILL }},
|
|
|
|
|
|
|
|
{ &hf_ieee80211_prism_did_length,
|
|
|
|
{"Length", "prism.did.length", FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
|
|
"Length of data", HFILL }},
|
|
|
|
|
|
|
|
{ &hf_ieee80211_prism_did_hosttime,
|
|
|
|
{"Host Time", "prism.did.hosttime", FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
|
|
"In jiffies - for our system this is in 10ms units", HFILL }},
|
|
|
|
|
|
|
|
{ &hf_ieee80211_prism_did_mactime,
|
2012-10-14 22:38:58 +00:00
|
|
|
{"MAC timestamp (lower 32 bits)", "prism.did.mactime", FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
|
|
"Lower 32 bits of value in microseconds of the MAC's Time Synchronization Function timer when the first bit of the MPDU arrived at the MAC.", HFILL }},
|
2011-10-12 05:08:51 +00:00
|
|
|
|
|
|
|
{ &hf_ieee80211_prism_did_channel,
|
2012-10-14 22:38:58 +00:00
|
|
|
{"Channel", "prism.did.channel", FT_UINT32, BASE_DEC, NULL, 0x0,
|
2011-10-12 05:08:51 +00:00
|
|
|
NULL, HFILL }},
|
|
|
|
|
|
|
|
{ &hf_ieee80211_prism_did_rssi,
|
2012-10-14 22:38:58 +00:00
|
|
|
{"RSSI", "prism.did.rssi", FT_INT32, BASE_DEC, NULL, 0x0,
|
2011-10-12 05:08:51 +00:00
|
|
|
NULL, HFILL }},
|
|
|
|
|
|
|
|
{ &hf_ieee80211_prism_did_sq,
|
2012-10-14 22:38:58 +00:00
|
|
|
{"Signal Quality", "prism.did.sq", FT_UINT32, BASE_DEC, NULL, 0x0,
|
2011-10-12 05:08:51 +00:00
|
|
|
NULL, HFILL }},
|
|
|
|
|
|
|
|
{ &hf_ieee80211_prism_did_signal,
|
2012-10-14 22:38:58 +00:00
|
|
|
{"Signal", "prism.did.signal", FT_INT32, BASE_DEC, NULL, 0x0,
|
2011-10-12 05:08:51 +00:00
|
|
|
NULL, HFILL }},
|
|
|
|
|
|
|
|
{ &hf_ieee80211_prism_did_noise,
|
2012-10-14 22:38:58 +00:00
|
|
|
{"Noise", "prism.did.noise", FT_INT32, BASE_DEC, NULL, 0x0,
|
2011-10-12 05:08:51 +00:00
|
|
|
NULL, HFILL }},
|
|
|
|
|
|
|
|
{ &hf_ieee80211_prism_did_rate,
|
2012-10-14 22:38:58 +00:00
|
|
|
{"Data rate (Mb/s)", "prism.did.rate", FT_UINT32, BASE_CUSTOM, prism_rate_base_custom, 0x0,
|
|
|
|
"Speed this frame was sent/received at", HFILL }},
|
2011-10-12 05:08:51 +00:00
|
|
|
|
|
|
|
{ &hf_ieee80211_prism_did_istx,
|
|
|
|
{"IsTX", "prism.did.istx", FT_UINT32, BASE_HEX, VALS(prism_istx_vals), 0x0,
|
2012-10-14 22:38:58 +00:00
|
|
|
"Type of packet (RX or TX?)", HFILL }},
|
2011-10-12 05:08:51 +00:00
|
|
|
|
|
|
|
{ &hf_ieee80211_prism_did_frmlen,
|
2012-10-14 22:38:58 +00:00
|
|
|
{"Frame Length", "prism.did.frmlen", FT_UINT32, BASE_DEC, NULL, 0x0,
|
2011-10-12 05:08:51 +00:00
|
|
|
"Length of the following frame in bytes", HFILL }},
|
|
|
|
|
|
|
|
{ &hf_ieee80211_prism_did_unknown,
|
|
|
|
{"Unknown DID Field", "prism.did.unknown", FT_UINT32, BASE_HEX_DEC, NULL, 0x0,
|
|
|
|
NULL, HFILL }}
|
|
|
|
};
|
|
|
|
|
|
|
|
static gint *tree_array[] = {
|
|
|
|
&ett_prism,
|
|
|
|
&ett_prism_did
|
|
|
|
};
|
|
|
|
|
|
|
|
void proto_register_ieee80211_prism(void)
|
|
|
|
{
|
|
|
|
proto_prism = proto_register_protocol("Prism capture header", "Prism",
|
|
|
|
"prism");
|
|
|
|
proto_register_field_array(proto_prism, hf_prism, array_length(hf_prism));
|
|
|
|
proto_register_subtree_array(tree_array, array_length(tree_array));
|
|
|
|
}
|
|
|
|
|
|
|
|
void proto_reg_handoff_ieee80211_prism(void)
|
|
|
|
{
|
|
|
|
dissector_handle_t prism_handle;
|
|
|
|
|
|
|
|
prism_handle = create_dissector_handle(dissect_prism, proto_prism);
|
2012-05-02 03:11:00 +00:00
|
|
|
dissector_add_uint("wtap_encap", WTAP_ENCAP_IEEE_802_11_PRISM, prism_handle);
|
2011-10-12 05:08:51 +00:00
|
|
|
ieee80211_handle = find_dissector("wlan");
|
|
|
|
wlancap_handle = find_dissector("wlancap");
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* 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:
|
|
|
|
*/
|