/* packet-ieee80211.c
* Routines for Wireless LAN (IEEE 802.11) dissection
- * Copyright 2000, Axis Communications AB
+ * Copyright 2000, Axis Communications AB
* Inquiries/bugreports should be sent to Johan.Jorgensen@axis.com
*
- * $Id: packet-ieee80211.c,v 1.68 2002/06/19 17:57:23 guy Exp $
+ * $Id: packet-ieee80211.c,v 1.101 2003/09/24 23:35:39 guy Exp $
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@ethereal.com>
* 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.
*
* Credits:
- *
+ *
* The following people helped me by pointing out bugs etc. Thank you!
*
* Marco Molteni
- * Lena-Marie Nilsson
+ * Lena-Marie Nilsson
* Magnus Hultman-Persson
*/
+/*
+ * 09/12/2003 - Added dissection of country information tag
+ *
+ * Ritchie<at>tipsybottle.com
+ */
+
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <stdio.h>
#include <stdlib.h>
-#ifdef HAVE_SYS_TYPES_H
-# include <sys/types.h>
-#endif
-
-#ifdef HAVE_NETINET_IN_H
-# include <netinet/in.h>
-#endif
-
#ifdef NEED_SNPRINTF_H
-# ifdef HAVE_STDARG_H
-# include <stdarg.h>
-# else
-# include <varargs.h>
-# endif
# include "snprintf.h"
#endif
#include "packet-llc.h"
#include "packet-ieee80211.h"
#include "etypes.h"
+#include "crc32.h"
/* Defragment fragmented 802.11 datagrams */
static gboolean wlan_defragment = TRUE;
#define SSWAP(a,b) {guint8 tmp = s[a]; s[a] = s[b]; s[b] = tmp;}
/* #define USE_ENV */
-/* When this is set, an unlimited number of WEP keys can be set in the
- environment:
+/* When this is set, an unlimited number of WEP keys can be set in the
+ environment:
ETHEREAL_WEPKEYNUM=##
- ETHEREAL_WEPKEY1=aa:bb:cc:dd:...
- ETHEREAL_WEPKEY2=aa:bab:cc:dd:ee:...
+ ETHEREAL_WEPKEY1=aa:bb:cc:dd:...
+ ETHEREAL_WEPKEY2=aa:bab:cc:dd:ee:...
... you get the idea.
/* ************************************************************************* */
/* Logical field codes (IEEE 802.11 encoding of tags) */
/* ************************************************************************* */
-#define TAG_SSID 0x00
-#define TAG_SUPP_RATES 0x01
-#define TAG_FH_PARAMETER 0x02
-#define TAG_DS_PARAMETER 0x03
-#define TAG_CF_PARAMETER 0x04
-#define TAG_TIM 0x05
-#define TAG_IBSS_PARAMETER 0x06
-#define TAG_CHALLENGE_TEXT 0x10
+#define TAG_SSID 0x00
+#define TAG_SUPP_RATES 0x01
+#define TAG_FH_PARAMETER 0x02
+#define TAG_DS_PARAMETER 0x03
+#define TAG_CF_PARAMETER 0x04
+#define TAG_TIM 0x05
+#define TAG_IBSS_PARAMETER 0x06
+#define TAG_COUNTRY_INFO 0x07
+#define TAG_FH_HOPPING_PARAMETER 0x08
+#define TAG_FH_HOPPING_TABLE 0x09
+#define TAG_CHALLENGE_TEXT 0x10
+#define TAG_ERP_INFO 0x2A
+#define TAG_ERP_INFO_OLD 0x2F /* IEEE Std 802.11g/D4.0 */
+#define TAG_EXT_SUPP_RATES 0x32
+#define TAG_VENDOR_SPECIFIC_IE 0xDD
+
+#define WPA_OUI "\x00\x50\xF2"
/* ************************************************************************* */
/* Frame types, and their names */
static int hf_fragment_multiple_tails = -1;
static int hf_fragment_too_long_fragment = -1;
static int hf_fragment_error = -1;
+static int hf_reassembled_in = -1;
static int proto_wlan_mgt = -1;
/* Flags found in the capability field (fixed field) */
/* ************************************************************************* */
static int ff_capture = -1;
-static int ff_cf_sta_poll = -1; /* CF pollable status for a STA */
-static int ff_cf_ap_poll = -1; /* CF pollable status for an AP */
static int ff_cf_ess = -1;
static int ff_cf_ibss = -1;
+static int ff_cf_sta_poll = -1; /* CF pollable status for a STA */
+static int ff_cf_ap_poll = -1; /* CF pollable status for an AP */
static int ff_cf_privacy = -1;
static int ff_cf_preamble = -1;
static int ff_cf_pbcc = -1;
static int ff_cf_agility = -1;
+static int ff_short_slot_time = -1;
+static int ff_dsss_ofdm = -1;
/* ************************************************************************* */
/* Tagged value format fields */
static gint ett_tagged_parameters = -1;
static gint ett_wep_parameters = -1;
-fragment_items frag_items = {
+static const fragment_items frag_items = {
&ett_fragment,
&ett_fragments,
&hf_fragments,
&hf_fragment_multiple_tails,
&hf_fragment_too_long_fragment,
&hf_fragment_error,
+ &hf_reassembled_in,
"fragments"
};
/* This is the capture function used to update packet counts */
/* ************************************************************************* */
static void
-capture_ieee80211_common (const u_char * pd, int offset, int len,
+capture_ieee80211_common (const guchar * pd, int offset, int len,
packet_counts * ld, gboolean fixed_length_header)
{
guint16 fcf, hdr_length;
* Handle 802.11 with a variable-length link-layer header.
*/
void
-capture_ieee80211 (const u_char * pd, int offset, int len, packet_counts * ld)
+capture_ieee80211 (const guchar * pd, int offset, int len, packet_counts * ld)
{
capture_ieee80211_common (pd, offset, len, ld, FALSE);
}
* maximum length).
*/
void
-capture_ieee80211_fixed (const u_char * pd, int offset, int len, packet_counts * ld)
+capture_ieee80211_fixed (const guchar * pd, int offset, int len, packet_counts * ld)
{
capture_ieee80211_common (pd, offset, len, ld, TRUE);
}
case FIELD_CAP_INFO:
capability = tvb_get_letohs (tvb, offset);
- cap_item = proto_tree_add_uint_format (tree, ff_capture,
+ cap_item = proto_tree_add_uint_format (tree, ff_capture,
tvb, offset, 2,
capability,
"Capability Information: 0x%04X",
capability);
cap_tree = proto_item_add_subtree (cap_item, ett_cap_tree);
- proto_tree_add_boolean (cap_tree, ff_cf_ess, tvb, offset, 1,
- capability);
- proto_tree_add_boolean (cap_tree, ff_cf_ibss, tvb, offset, 1,
- capability);
- proto_tree_add_boolean (cap_tree, ff_cf_privacy, tvb, offset, 1,
- capability);
- proto_tree_add_boolean (cap_tree, ff_cf_preamble, tvb, offset, 1,
+ proto_tree_add_boolean (cap_tree, ff_cf_ess, tvb, offset, 2,
capability);
- proto_tree_add_boolean (cap_tree, ff_cf_pbcc, tvb, offset, 1,
- capability);
- proto_tree_add_boolean (cap_tree, ff_cf_agility, tvb, offset, 1,
+ proto_tree_add_boolean (cap_tree, ff_cf_ibss, tvb, offset, 2,
capability);
if (ESS_SET (capability) != 0) /* This is an AP */
proto_tree_add_uint (cap_tree, ff_cf_ap_poll, tvb, offset, 2,
- ((capability & 0xC) >> 2));
+ capability);
else /* This is a STA */
proto_tree_add_uint (cap_tree, ff_cf_sta_poll, tvb, offset, 2,
- ((capability & 0xC) >> 2));
+ capability);
+ proto_tree_add_boolean (cap_tree, ff_cf_privacy, tvb, offset, 2,
+ capability);
+ proto_tree_add_boolean (cap_tree, ff_cf_preamble, tvb, offset, 2,
+ capability);
+ proto_tree_add_boolean (cap_tree, ff_cf_pbcc, tvb, offset, 2,
+ capability);
+ proto_tree_add_boolean (cap_tree, ff_cf_agility, tvb, offset, 2,
+ capability);
+ proto_tree_add_boolean (cap_tree, ff_short_slot_time, tvb, offset, 2,
+ capability);
+ proto_tree_add_boolean (cap_tree, ff_dsss_ofdm, tvb, offset, 2,
+ capability);
break;
case FIELD_AUTH_ALG:
}
}
+static char *wpa_cipher_str[] =
+{
+ "NONE",
+ "WEP (40-bit)",
+ "TKIP",
+ "AES (OCB)",
+ "AES (CCM)",
+ "WEP (104-bit)",
+};
+
+static char *
+wpa_cipher_idx2str(guint idx)
+{
+ if (idx < sizeof(wpa_cipher_str)/sizeof(wpa_cipher_str[0]))
+ return wpa_cipher_str[idx];
+ return "UNKNOWN";
+}
+
+static char *wpa_keymgmt_str[] =
+{
+ "NONE",
+ "WPA",
+ "PSK",
+};
+
+static char *
+wpa_keymgmt_idx2str(guint idx)
+{
+ if (idx < sizeof(wpa_keymgmt_str)/sizeof(wpa_keymgmt_str[0]))
+ return wpa_keymgmt_str[idx];
+ return "UNKNOWN";
+}
+
+static void
+dissect_vendor_specific_ie(proto_tree * tree, tvbuff_t * tvb, int offset,
+ guint32 tag_len, const guint8 *tag_val)
+{
+ guint32 tag_val_off = 0;
+ char out_buff[SHORT_STR];
+ int i;
+
+ if (tag_val_off + 6 <= tag_len && !memcmp(tag_val, WPA_OUI"\x01", 4)) {
+ snprintf(out_buff, SHORT_STR, "WPA IE, type %u, version %u",
+ tag_val[tag_val_off + 3], pletohs(&tag_val[tag_val_off + 4]));
+ proto_tree_add_string(tree, tag_interpretation, tvb, offset, 6, out_buff);
+ offset += 6;
+ tag_val_off += 6;
+ if (tag_val_off + 4 <= tag_len) {
+ /* multicast cipher suite */
+ if (!memcmp(&tag_val[tag_val_off], WPA_OUI, 3)) {
+ snprintf(out_buff, SHORT_STR, "Multicast cipher suite: %s",
+ wpa_cipher_idx2str(tag_val[tag_val_off + 3]));
+ proto_tree_add_string(tree, tag_interpretation, tvb, offset, 4, out_buff);
+ offset += 4;
+ tag_val_off += 4;
+ /* unicast cipher suites */
+ if (tag_val_off + 2 <= tag_len) {
+ snprintf(out_buff, SHORT_STR, "# of unicast cipher suites: %u",
+ pletohs(tag_val + tag_val_off));
+ proto_tree_add_string(tree, tag_interpretation, tvb, offset, 2, out_buff);
+ offset += 2;
+ tag_val_off += 2;
+ i = 1;
+ while (tag_val_off + 4 <= tag_len) {
+ if (!memcmp(&tag_val[tag_val_off], WPA_OUI, 3)) {
+ snprintf(out_buff, SHORT_STR, "Unicast cipher suite %u: %s",
+ i, wpa_cipher_idx2str(tag_val[tag_val_off + 3]));
+ proto_tree_add_string(tree, tag_interpretation, tvb, offset, 4, out_buff);
+ offset += 4;
+ tag_val_off += 4;
+ i ++;
+ }
+ else
+ break;
+ }
+ /* authenticated key management suites */
+ if (tag_val_off + 2 <= tag_len) {
+ snprintf(out_buff, SHORT_STR, "# of auth key management suites: %u",
+ pletohs(tag_val + tag_val_off));
+ proto_tree_add_string(tree, tag_interpretation, tvb, offset, 2, out_buff);
+ offset += 2;
+ tag_val_off += 2;
+ i = 1;
+ while (tag_val_off + 4 <= tag_len) {
+ if (!memcmp(&tag_val[tag_val_off], WPA_OUI, 3)) {
+ snprintf(out_buff, SHORT_STR, "auth key management suite %u: %s",
+ i, wpa_keymgmt_idx2str(tag_val[tag_val_off + 3]));
+ proto_tree_add_string(tree, tag_interpretation, tvb, offset, 4, out_buff);
+ offset += 4;
+ tag_val_off += 4;
+ i ++;
+ }
+ else
+ break;
+ }
+ }
+ }
+ }
+ }
+ if (tag_val_off < tag_len)
+ proto_tree_add_string(tree, tag_interpretation, tvb,
+ offset, tag_len - tag_val_off, "Not interpreted");
+ }
+ else
+ proto_tree_add_string(tree, tag_interpretation,
+ tvb, offset, tag_len, "Not interpreted");
+}
/* ************************************************************************* */
/* Dissect and add tagged (optional) fields to proto tree */
/* ************************************************************************* */
+
+static const value_string tag_num_vals[] = {
+ { TAG_SSID, "SSID parameter set" },
+ { TAG_SUPP_RATES, "Supported Rates" },
+ { TAG_FH_PARAMETER, "FH Parameter set" },
+ { TAG_DS_PARAMETER, "DS Parameter set" },
+ { TAG_CF_PARAMETER, "CF Parameter set" },
+ { TAG_TIM, "(TIM) Traffic Indication Map" },
+ { TAG_IBSS_PARAMETER, "IBSS Parameter set" },
+ { TAG_COUNTRY_INFO, "Country Information" },
+ { TAG_FH_HOPPING_PARAMETER, "Hopping Pattern Parameters" },
+ { TAG_CHALLENGE_TEXT, "Challenge text" },
+ { TAG_ERP_INFO, "ERP Information" },
+ { TAG_ERP_INFO_OLD, "ERP Information" },
+ { TAG_EXT_SUPP_RATES, "Extended Supported Rates" },
+ { TAG_VENDOR_SPECIFIC_IE, "Vendor Specific" },
+ { 0, NULL }
+};
+
+static const value_string environment_vals[] = {
+ { 0x20, "Any" },
+ { 0x4f, "Outdoor" },
+ { 0x49, "Indoor" },
+ { 0, NULL }
+};
+
static int
add_tagged_field (proto_tree * tree, tvbuff_t * tvb, int offset)
{
tag_no = tvb_get_guint8(tvb, offset);
+ proto_tree_add_uint_format (tree, tag_number, tvb, offset, 1, tag_no,
+ "Tag Number: %u (%s)",
+ tag_no,
+ val_to_str(tag_no, tag_num_vals,
+ (tag_no >= 17 && tag_no <= 31) ?
+ "Reserved for challenge text" :
+ "Reserved tag number"));
+
tag_len = tvb_get_guint8(tvb, offset + 1);
+ proto_tree_add_uint (tree, tag_length, tvb, offset + 1, 1, tag_len);
tag_data_ptr = tvb_get_ptr (tvb, offset + 2, tag_len);
-
- if ((tag_no >= 17) && (tag_no <= 31))
- { /* Reserved for challenge text */
- proto_tree_add_uint_format (tree, tag_number, tvb, offset, 1, tag_no,
- "Tag Number: %u (Reserved for challenge text)",
- tag_no);
-
- proto_tree_add_uint (tree, tag_length, tvb, offset + 1, 1, tag_len);
- proto_tree_add_string (tree, tag_interpretation, tvb, offset + 2,
- tag_len, "Not interpreted");
- return (int) tag_len + 2;
- }
-
- /* Next See if tag is reserved - if true, skip it! */
- if (((tag_no >= 7) && (tag_no <= 15))
- || ((tag_no >= 32) && (tag_no <= 255)))
- {
- proto_tree_add_uint_format (tree, tag_number, tvb, offset, 1, tag_no,
- "Tag Number: %u (Reserved tag number)",
- tag_no);
-
- proto_tree_add_uint (tree, tag_length, tvb, offset + 1, 1, tag_len);
-
- proto_tree_add_string (tree, tag_interpretation, tvb, offset + 2,
- tag_len, "Not interpreted");
- return (int) tag_len + 2;
- }
-
-
switch (tag_no)
{
case TAG_SSID:
- proto_tree_add_uint_format (tree, tag_number, tvb, offset, 1, tag_no,
- "Tag Number: %u (SSID parameter set)",
- tag_no);
-
- proto_tree_add_uint (tree, tag_length, tvb, offset + 1, 1, tag_len);
-
memset (out_buff, 0, SHORT_STR);
memcpy (out_buff, tag_data_ptr, (size_t) tag_len);
case TAG_SUPP_RATES:
- proto_tree_add_uint_format (tree, tag_number, tvb, offset, 1, tag_no,
- "Tag Number: %u (Supported Rates)", tag_no);
-
- proto_tree_add_uint (tree, tag_length, tvb, offset + 1, 1, tag_len);
-
+ case TAG_EXT_SUPP_RATES:
memset (out_buff, 0, SHORT_STR);
strcpy (out_buff, "Supported rates: ");
n = strlen (out_buff);
ret = snprintf (out_buff + n, SHORT_STR - n, "%2.1f%s ",
(tag_data_ptr[i] & 0x7F) * 0.5,
(tag_data_ptr[i] & 0x80) ? "(B)" : "");
- if (ret == -1) {
+ if (ret == -1 || ret >= SHORT_STR - n) {
/* Some versions of snprintf return -1 if they'd truncate
- the output. */
+ the output. Others return <buf_size> or greater. */
break;
}
n += ret;
if (n < SHORT_STR)
snprintf (out_buff + n, SHORT_STR - n, "[Mbit/sec]");
+ out_buff[SHORT_STR-1] = '\0';
proto_tree_add_string (tree, tag_interpretation, tvb, offset + 2,
tag_len, out_buff);
break;
case TAG_FH_PARAMETER:
- proto_tree_add_uint_format (tree, tag_number, tvb, offset, 1, tag_no,
- "Tag Number: %u (FH Parameter set)",
- tag_no);
-
- proto_tree_add_uint (tree, tag_length, tvb, offset + 1, 1, tag_len);
memset (out_buff, 0, SHORT_STR);
snprintf (out_buff, SHORT_STR,
case TAG_DS_PARAMETER:
- proto_tree_add_uint_format (tree, tag_number, tvb, offset, 1, tag_no,
- "Tag Number: %u (DS Parameter set)",
- tag_no);
-
- proto_tree_add_uint (tree, tag_length, tvb, offset + 1, 1, tag_len);
memset (out_buff, 0, SHORT_STR);
snprintf (out_buff, SHORT_STR, "Current Channel: %u", tag_data_ptr[0]);
case TAG_CF_PARAMETER:
- proto_tree_add_uint_format (tree, tag_number, tvb, offset, 1, tag_no,
- "Tag Number: %u (CF Parameter set)",
- tag_no);
-
- proto_tree_add_uint (tree, tag_length, tvb, offset + 1, 1, tag_len);
memset (out_buff, 0, SHORT_STR);
snprintf (out_buff, SHORT_STR,
case TAG_TIM:
- proto_tree_add_uint_format (tree, tag_number, tvb, offset, 1, tag_no,
- "Tag Number: %u ((TIM) Traffic Indication Map)",
- tag_no);
-
- proto_tree_add_uint (tree, tag_length, tvb, offset + 1, 1, tag_len);
memset (out_buff, 0, SHORT_STR);
snprintf (out_buff, SHORT_STR,
"DTIM count %u, DTIM period %u, Bitmap control 0x%X, "
case TAG_IBSS_PARAMETER:
- proto_tree_add_uint_format (tree, tag_number, tvb, offset, 1, tag_no,
- "Tag Number: %u (IBSS Parameter set)",
- tag_no);
-
- proto_tree_add_uint (tree, tag_length, tvb, offset + 1, 1, tag_len);
memset (out_buff, 0, SHORT_STR);
snprintf (out_buff, SHORT_STR, "ATIM window 0x%X",
pletohs (tag_data_ptr));
break;
+ case TAG_COUNTRY_INFO:
+ memset (out_buff, 0, SHORT_STR);
+
+ snprintf (out_buff, SHORT_STR, "Country Code: %c%c, %s Environment",
+ tag_data_ptr[0], tag_data_ptr[1],
+ val_to_str(tag_data_ptr[2], environment_vals,"Unknown (0x%02x)"));
- case TAG_CHALLENGE_TEXT:
- proto_tree_add_uint_format (tree, tag_number, tvb, offset, 1, tag_no,
- "Tag Number: %u (Challenge text)", tag_no);
+ n = strlen (out_buff);
+
+ for (i = 3; (i + 3) <= tag_len && n < SHORT_STR; i += 3)
+ {
+ ret = snprintf(out_buff + n, SHORT_STR - n,
+ ", Start Channel: %u, Channels: %u, Max TX Power: %d dBm",
+ tag_data_ptr[i], tag_data_ptr[i + 1],
+ (gint)tag_data_ptr[i + 2]);
+
+ if (ret == -1 || ret >= SHORT_STR - n) {
+ /* Some versions of snprintf return -1 if they'd truncate
+ the output. Others return <buf_size> or greater. */
+ break;
+ }
+ n += ret;
+ }
+
+ proto_tree_add_string (tree, tag_interpretation, tvb, offset + 2,tag_len, out_buff);
+ break;
- proto_tree_add_uint (tree, tag_length, tvb, offset + 1, 1, tag_len);
+
+ case TAG_FH_HOPPING_PARAMETER:
+ memset (out_buff, 0, SHORT_STR);
+ snprintf (out_buff, SHORT_STR, "Prime Radix: %u, Number of Channels: %u",
+ tag_data_ptr[0], tag_data_ptr[1]);
+ proto_tree_add_string (tree, tag_interpretation, tvb, offset + 2, tag_len, out_buff);
+
+
+ break;
+
+
+ case TAG_CHALLENGE_TEXT:
memset (out_buff, 0, SHORT_STR);
snprintf (out_buff, SHORT_STR, "Challenge text: %.47s", tag_data_ptr);
proto_tree_add_string (tree, tag_interpretation, tvb, offset + 2,
break;
+
+
+ case TAG_ERP_INFO:
+ case TAG_ERP_INFO_OLD:
+ memset (out_buff, 0, SHORT_STR);
+
+ snprintf (out_buff, SHORT_STR,
+ "ERP info: 0x%x (%sNon-ERP STAs, %suse protection, %s preambles)",
+ tag_data_ptr[0],
+ tag_data_ptr[0] & 0x01 ? "" : "no ",
+ tag_data_ptr[0] & 0x02 ? "" : "do not ",
+ tag_data_ptr[0] & 0x04 ? "short or long": "long");
+ proto_tree_add_string (tree, tag_interpretation, tvb, offset + 2,
+ tag_len, out_buff);
+
+ break;
+
+ case TAG_VENDOR_SPECIFIC_IE:
+ dissect_vendor_specific_ie(tree, tvb, offset + 2, tag_len,
+ tag_data_ptr);
+ break;
+
+
default:
- return 0;
+ proto_tree_add_string (tree, tag_interpretation, tvb, offset + 2,
+ tag_len, "Not interpreted");
+ break;
}
return tag_len + 2;
}
+void
+ieee_80211_add_tagged_parameters (tvbuff_t * tvb, int offset, proto_tree * tree,
+ int tagged_parameters_len)
+{
+ int next_len;
+
+ while (tagged_parameters_len > 0) {
+ if ((next_len=add_tagged_field (tree, tvb, offset))==0)
+ break;
+ if (next_len > tagged_parameters_len) {
+ /* XXX - flag this as an error? */
+ next_len = tagged_parameters_len;
+ }
+ offset += next_len;
+ tagged_parameters_len -= next_len;
+ }
+}
+
/* ************************************************************************* */
/* Dissect 802.11 management frame */
/* ************************************************************************* */
proto_tree *mgt_tree;
proto_tree *fixed_tree;
proto_tree *tagged_tree;
- guint32 next_idx;
- guint32 next_len;
+ int offset;
int tagged_parameter_tree_len;
CHECK_DISPLAY_AS_X(data_handle,proto_wlan_mgt, tvb, pinfo, tree);
add_fixed_field (fixed_tree, tvb, 0, FIELD_CAP_INFO);
add_fixed_field (fixed_tree, tvb, 2, FIELD_LISTEN_IVAL);
- next_idx = 4; /* Size of fixed fields */
+ offset = 4; /* Size of fixed fields */
tagged_parameter_tree_len =
- tvb_reported_length_remaining(tvb, next_idx);
- tagged_tree = get_tagged_parameter_tree (mgt_tree, tvb, next_idx,
+ tvb_reported_length_remaining(tvb, offset);
+ tagged_tree = get_tagged_parameter_tree (mgt_tree, tvb, offset,
tagged_parameter_tree_len);
- while (tagged_parameter_tree_len > 0) {
- if ((next_len=add_tagged_field (tagged_tree, tvb, next_idx))==0)
- break;
- next_idx +=next_len;
- tagged_parameter_tree_len -= next_len;
- }
+ ieee_80211_add_tagged_parameters (tvb, offset, tagged_tree,
+ tagged_parameter_tree_len);
break;
add_fixed_field (fixed_tree, tvb, 2, FIELD_STATUS_CODE);
add_fixed_field (fixed_tree, tvb, 4, FIELD_ASSOC_ID);
- next_idx = 6; /* Size of fixed fields */
+ offset = 6; /* Size of fixed fields */
tagged_parameter_tree_len =
- tvb_reported_length_remaining(tvb, next_idx);
- tagged_tree = get_tagged_parameter_tree (mgt_tree, tvb, next_idx,
+ tvb_reported_length_remaining(tvb, offset);
+ tagged_tree = get_tagged_parameter_tree (mgt_tree, tvb, offset,
tagged_parameter_tree_len);
- while (tagged_parameter_tree_len > 0) {
- if ((next_len=add_tagged_field (tagged_tree, tvb, next_idx))==0)
- break;
- next_idx +=next_len;
- tagged_parameter_tree_len -= next_len;
- }
+ ieee_80211_add_tagged_parameters (tvb, offset, tagged_tree,
+ tagged_parameter_tree_len);
break;
add_fixed_field (fixed_tree, tvb, 2, FIELD_LISTEN_IVAL);
add_fixed_field (fixed_tree, tvb, 4, FIELD_CURRENT_AP_ADDR);
- next_idx = 10; /* Size of fixed fields */
+ offset = 10; /* Size of fixed fields */
tagged_parameter_tree_len =
- tvb_reported_length_remaining(tvb, next_idx);
- tagged_tree = get_tagged_parameter_tree (mgt_tree, tvb, next_idx,
+ tvb_reported_length_remaining(tvb, offset);
+ tagged_tree = get_tagged_parameter_tree (mgt_tree, tvb, offset,
tagged_parameter_tree_len);
- while (tagged_parameter_tree_len > 0) {
- if ((next_len=add_tagged_field (tagged_tree, tvb, next_idx))==0)
- break;
- next_idx +=next_len;
- tagged_parameter_tree_len -= next_len;
- }
+ ieee_80211_add_tagged_parameters (tvb, offset, tagged_tree,
+ tagged_parameter_tree_len);
break;
case MGT_REASSOC_RESP:
add_fixed_field (fixed_tree, tvb, 2, FIELD_STATUS_CODE);
add_fixed_field (fixed_tree, tvb, 4, FIELD_ASSOC_ID);
- next_idx = 6; /* Size of fixed fields */
+ offset = 6; /* Size of fixed fields */
tagged_parameter_tree_len =
- tvb_reported_length_remaining(tvb, next_idx);
- tagged_tree = get_tagged_parameter_tree (mgt_tree, tvb, next_idx,
+ tvb_reported_length_remaining(tvb, offset);
+ tagged_tree = get_tagged_parameter_tree (mgt_tree, tvb, offset,
tagged_parameter_tree_len);
- while (tagged_parameter_tree_len > 0) {
- if ((next_len=add_tagged_field (tagged_tree, tvb, next_idx))==0)
- break;
- next_idx +=next_len;
- tagged_parameter_tree_len -= next_len;
- }
+ ieee_80211_add_tagged_parameters (tvb, offset, tagged_tree,
+ tagged_parameter_tree_len);
break;
case MGT_PROBE_REQ:
- next_idx = 0;
+ offset = 0;
tagged_parameter_tree_len =
- tvb_reported_length_remaining(tvb, next_idx);
- tagged_tree = get_tagged_parameter_tree (mgt_tree, tvb, next_idx,
+ tvb_reported_length_remaining(tvb, offset);
+ tagged_tree = get_tagged_parameter_tree (mgt_tree, tvb, offset,
tagged_parameter_tree_len);
- while (tagged_parameter_tree_len > 0) {
- if ((next_len=add_tagged_field (tagged_tree, tvb, next_idx))==0)
- break;
- next_idx +=next_len;
- tagged_parameter_tree_len -= next_len;
- }
+ ieee_80211_add_tagged_parameters (tvb, offset, tagged_tree,
+ tagged_parameter_tree_len);
break;
add_fixed_field (fixed_tree, tvb, 8, FIELD_BEACON_INTERVAL);
add_fixed_field (fixed_tree, tvb, 10, FIELD_CAP_INFO);
- next_idx = 12; /* Size of fixed fields */
+ offset = 12; /* Size of fixed fields */
tagged_parameter_tree_len =
- tvb_reported_length_remaining(tvb, next_idx);
- tagged_tree = get_tagged_parameter_tree (mgt_tree, tvb, next_idx,
+ tvb_reported_length_remaining(tvb, offset);
+ tagged_tree = get_tagged_parameter_tree (mgt_tree, tvb, offset,
tagged_parameter_tree_len);
- while (tagged_parameter_tree_len > 0) {
- if ((next_len=add_tagged_field (tagged_tree, tvb, next_idx))==0)
- break;
- next_idx +=next_len;
- tagged_parameter_tree_len -= next_len;
- }
+ ieee_80211_add_tagged_parameters (tvb, offset, tagged_tree,
+ tagged_parameter_tree_len);
break;
add_fixed_field (fixed_tree, tvb, 8, FIELD_BEACON_INTERVAL);
add_fixed_field (fixed_tree, tvb, 10, FIELD_CAP_INFO);
- next_idx = 12; /* Size of fixed fields */
+ offset = 12; /* Size of fixed fields */
tagged_parameter_tree_len =
- tvb_reported_length_remaining(tvb, next_idx);
- tagged_tree = get_tagged_parameter_tree (mgt_tree, tvb, next_idx,
+ tvb_reported_length_remaining(tvb, offset);
+ tagged_tree = get_tagged_parameter_tree (mgt_tree, tvb, offset,
tagged_parameter_tree_len);
- while (tagged_parameter_tree_len > 0) {
- if ((next_len=add_tagged_field (tagged_tree, tvb, next_idx))==0)
- break;
- next_idx +=next_len;
- tagged_parameter_tree_len -= next_len;
- }
+ ieee_80211_add_tagged_parameters (tvb, offset, tagged_tree,
+ tagged_parameter_tree_len);
break;
add_fixed_field (fixed_tree, tvb, 2, FIELD_AUTH_TRANS_SEQ);
add_fixed_field (fixed_tree, tvb, 4, FIELD_STATUS_CODE);
- next_idx = 6; /* Size of fixed fields */
+ offset = 6; /* Size of fixed fields */
tagged_parameter_tree_len =
- tvb_reported_length_remaining(tvb, next_idx);
+ tvb_reported_length_remaining(tvb, offset);
if (tagged_parameter_tree_len != 0)
{
tagged_tree = get_tagged_parameter_tree (mgt_tree,
tvb,
- next_idx,
+ offset,
tagged_parameter_tree_len);
- while (tagged_parameter_tree_len > 0) {
- if ((next_len=add_tagged_field (tagged_tree, tvb, next_idx))==0)
- break;
- next_idx +=next_len;
- tagged_parameter_tree_len -= next_len;
- }
+ ieee_80211_add_tagged_parameters (tvb, offset, tagged_tree,
+ tagged_parameter_tree_len);
}
break;
static void
dissect_ieee80211_common (tvbuff_t * tvb, packet_info * pinfo,
proto_tree * tree, gboolean fixed_length_header,
- gboolean has_radio_information, gboolean has_no_fcs)
+ gboolean has_radio_information, gboolean has_no_fcs,
+ gboolean wlan_broken_fc)
{
guint16 fcf, flags, frame_type_subtype;
guint16 seq_control;
col_clear (pinfo->cinfo, COL_INFO);
fcf = tvb_get_letohs (tvb, 0);
+ if (wlan_broken_fc) {
+ /* Swap bytes */
+ fcf = ((fcf & 0xff) << 8) | (((fcf & 0xff00) >> 8) & 0xff);
+ }
if (fixed_length_header)
hdr_len = DATA_LONG_HDR_LEN;
else
}
proto_tree_add_uint (hdr_tree, hf_fc_frame_type_subtype,
- tvb, 0, 1,
+ tvb,
+ wlan_broken_fc?1:0, 1,
frame_type_subtype);
- fc_item = proto_tree_add_uint_format (hdr_tree, hf_fc_field, tvb, 0, 2,
+ fc_item = proto_tree_add_uint_format (hdr_tree, hf_fc_field, tvb,
+ 0, 2,
fcf,
- "Frame Control: 0x%04X",
- fcf);
+ "Frame Control: 0x%04X (%s)",
+ fcf, wlan_broken_fc?"Swapped":"Normal");
fc_tree = proto_item_add_subtree (fc_item, ett_fc_tree);
- proto_tree_add_uint (fc_tree, hf_fc_proto_version, tvb, 0, 1,
+ proto_tree_add_uint (fc_tree, hf_fc_proto_version, tvb,
+ wlan_broken_fc?1:0, 1,
COOK_PROT_VERSION (fcf));
- proto_tree_add_uint (fc_tree, hf_fc_frame_type, tvb, 0, 1,
+ proto_tree_add_uint (fc_tree, hf_fc_frame_type, tvb,
+ wlan_broken_fc?1:0, 1,
COOK_FRAME_TYPE (fcf));
proto_tree_add_uint (fc_tree, hf_fc_frame_subtype,
- tvb, 0, 1,
+ tvb,
+ wlan_broken_fc?1:0, 1,
COOK_FRAME_SUBTYPE (fcf));
flag_item =
- proto_tree_add_uint_format (fc_tree, hf_fc_flags, tvb, 1, 1,
+ proto_tree_add_uint_format (fc_tree, hf_fc_flags, tvb,
+ wlan_broken_fc?0:1, 1,
flags, "Flags: 0x%X", flags);
flag_tree = proto_item_add_subtree (flag_item, ett_proto_flags);
- proto_tree_add_uint (flag_tree, hf_fc_data_ds, tvb, 1, 1,
+ proto_tree_add_uint (flag_tree, hf_fc_data_ds, tvb,
+ wlan_broken_fc?0:1, 1,
COOK_DS_STATUS (flags));
+ proto_tree_add_boolean_hidden (flag_tree, hf_fc_to_ds, tvb, 1, 1,
+ flags);
+ proto_tree_add_boolean_hidden (flag_tree, hf_fc_from_ds, tvb, 1, 1,
+ flags);
- proto_tree_add_boolean (flag_tree, hf_fc_more_frag, tvb, 1, 1,
+ proto_tree_add_boolean (flag_tree, hf_fc_more_frag, tvb,
+ wlan_broken_fc?0:1, 1,
flags);
- proto_tree_add_boolean (flag_tree, hf_fc_retry, tvb, 1, 1, flags);
+ proto_tree_add_boolean (flag_tree, hf_fc_retry, tvb,
+ wlan_broken_fc?0:1, 1, flags);
- proto_tree_add_boolean (flag_tree, hf_fc_pwr_mgt, tvb, 1, 1, flags);
+ proto_tree_add_boolean (flag_tree, hf_fc_pwr_mgt, tvb,
+ wlan_broken_fc?0:1, 1, flags);
- proto_tree_add_boolean (flag_tree, hf_fc_more_data, tvb, 1, 1,
+ proto_tree_add_boolean (flag_tree, hf_fc_more_data, tvb,
+ wlan_broken_fc?0:1, 1,
flags);
- proto_tree_add_boolean (flag_tree, hf_fc_wep, tvb, 1, 1, flags);
+ proto_tree_add_boolean (flag_tree, hf_fc_wep, tvb,
+ wlan_broken_fc?0:1, 1, flags);
- proto_tree_add_boolean (flag_tree, hf_fc_order, tvb, 1, 1, flags);
+ proto_tree_add_boolean (flag_tree, hf_fc_order, tvb,
+ wlan_broken_fc?0:1, 1, flags);
- if (frame_type_subtype == CTRL_PS_POLL)
+ if (frame_type_subtype == CTRL_PS_POLL)
proto_tree_add_uint(hdr_tree, hf_assoc_id,tvb,2,2,
COOK_ASSOC_ID(tvb_get_letohs(tvb,2)));
-
+
else
proto_tree_add_uint (hdr_tree, hf_did_duration, tvb, 2, 2,
tvb_get_letohs (tvb, 2));
proto_tree_add_ether_hidden(hdr_tree, hf_addr, tvb, 4, 6, dst);
proto_tree_add_ether_hidden(hdr_tree, hf_addr, tvb, 10, 6, src);
break;
-
-
+
+
case DATA_ADDR_T2:
proto_tree_add_ether (hdr_tree, hf_addr_da, tvb, 4, 6, dst);
proto_tree_add_ether (hdr_tree, hf_addr_bssid, tvb, 10, 6,
proto_tree_add_ether_hidden(hdr_tree, hf_addr, tvb, 4, 6, dst);
proto_tree_add_ether_hidden(hdr_tree, hf_addr, tvb, 16, 6, src);
break;
-
+
case DATA_ADDR_T3:
proto_tree_add_ether (hdr_tree, hf_addr_bssid, tvb, 4, 6,
proto_tree_add_ether_hidden(hdr_tree, hf_addr, tvb, 10, 6, src);
proto_tree_add_ether_hidden(hdr_tree, hf_addr, tvb, 16, 6, dst);
break;
-
+
case DATA_ADDR_T4:
proto_tree_add_ether (hdr_tree, hf_addr_ra, tvb, 4, 6,
len -= 4;
reported_len -= 4;
if (tree)
- proto_tree_add_item (hdr_tree, hf_fcs, tvb, hdr_len + len, 4, FALSE);
+ {
+ guint32 fcs = crc32_tvb_802(tvb, hdr_len + len);
+ guint32 sent_fcs = tvb_get_ntohl(tvb, hdr_len + len);
+ if (fcs == sent_fcs)
+ proto_tree_add_uint_format(hdr_tree, hf_fcs, tvb,
+ hdr_len + len, 4, sent_fcs,
+ "Frame check sequence: 0x%08x (correct)", sent_fcs);
+ else
+ proto_tree_add_uint_format(hdr_tree, hf_fcs, tvb,
+ hdr_len + len, 4, sent_fcs,
+ "Frame check sequence: 0x%08x (incorrect, should be 0x%08x)",
+ sent_fcs, fcs);
+ }
}
}
*/
gboolean can_decrypt = FALSE;
proto_tree *wep_tree = NULL;
+ guint32 iv;
+ guint8 key;
+ /*
+ * XXX - pass the IV and key to "try_decrypt_wep()", and have it pass
+ * them to "wep_decrypt()", rather than having "wep_decrypt()" extract
+ * them itself.
+ *
+ * Also, just pass the data *following* the WEP parameters as the
+ * buffer to decrypt.
+ */
+ iv = tvb_get_letoh24(tvb, hdr_len);
if (tree) {
proto_item *wep_fields;
"WEP parameters");
wep_tree = proto_item_add_subtree (wep_fields, ett_wep_parameters);
- proto_tree_add_item (wep_tree, hf_wep_iv, tvb, hdr_len, 3, TRUE);
-
- proto_tree_add_uint (wep_tree, hf_wep_key, tvb, hdr_len + 3, 1,
- COOK_WEP_KEY (tvb_get_guint8 (tvb, hdr_len + 3)));
+ proto_tree_add_uint (wep_tree, hf_wep_iv, tvb, hdr_len, 3, iv);
}
+ key = COOK_WEP_KEY (tvb_get_guint8 (tvb, hdr_len + 3));
+ if (tree)
+ proto_tree_add_uint (wep_tree, hf_wep_key, tvb, hdr_len + 3, 1, key);
/* Subtract out the length of the IV. */
len -= 4;
reported_len -= 4;
- if (len < 0 || reported_len < 0) {
- /* We don't have anything beyond the IV. */
- return;
- }
/*
* Well, this packet should, in theory, have an ICV.
*/
len -= 4;
reported_len -= 4;
- if (tree)
- proto_tree_add_item (wep_tree, hf_wep_icv, tvb, hdr_len + 4 + len, 4,
- FALSE);
can_decrypt = TRUE;
}
*/
next_tvb = tvb_new_subset(tvb, hdr_len + 4, len, reported_len);
+ if (tree && can_decrypt)
+ proto_tree_add_uint_format (wep_tree, hf_wep_icv, tvb,
+ hdr_len + 4 + len, 4,
+ tvb_get_ntohl(tvb, hdr_len + 4 + len),
+ "WEP ICV: 0x%08x (not verified)",
+ tvb_get_ntohl(tvb, hdr_len + 4 + len));
+
call_dissector(data_handle, next_tvb, pinfo, tree);
- return;
+ return;
} else {
+
+ if (tree)
+ proto_tree_add_uint_format (wep_tree, hf_wep_icv, tvb,
+ hdr_len + 4 + len, 4,
+ tvb_get_ntohl(tvb, hdr_len + 4 + len),
+ "WEP ICV: 0x%08x (correct)",
+ tvb_get_ntohl(tvb, hdr_len + 4 + len));
+
add_new_data_source(pinfo, next_tvb, "Decrypted WEP data");
}
wlan_fragment_table,
wlan_reassembled_table,
frag_number,
- len,
+ reported_len,
more_frags);
- if (fd_head != NULL) {
- /*
- * Either this is reassembled or it wasn't fragmented
- * (see comment above about some networking interfaces).
- * In either case, it's now in the table of reassembled
- * packets.
- *
- * If the "fragment_data" structure doesn't have a list of
- * fragments, we assume it's a placeholder to mark those
- * not-really-fragmented packets, and just treat this as
- * a non-fragmented frame.
- */
- if (fd_head->next != NULL) {
- next_tvb = tvb_new_real_data(fd_head->data, fd_head->len, fd_head->len);
- tvb_set_child_real_data_tvbuff(tvb, next_tvb);
- add_new_data_source(pinfo, next_tvb, "Reassembled 802.11");
-
- /* Show all fragments. */
- show_fragment_seq_tree(fd_head, &frag_items, hdr_tree, pinfo, next_tvb);
- } else {
- /*
- * Not fragmented, really.
- * Show it as a regular frame.
- */
- next_tvb = tvb_new_subset (next_tvb, hdr_len, len, reported_len);
- }
-
- /* It's not fragmented. */
- pinfo->fragmented = FALSE;
- } else {
- /* We don't have the complete reassembled payload. */
- next_tvb = NULL;
- }
+ next_tvb = process_reassembled_data(tvb, hdr_len, pinfo,
+ "Reassembled 802.11", fd_head,
+ &frag_items, NULL, hdr_tree);
} else {
/*
* If this is the first fragment, dissect its contents, otherwise
call_dissector(data_handle, next_tvb, pinfo, tree);
pinfo->fragmented = save_fragmented;
return;
- }
-
+ }
+
switch (COOK_FRAME_TYPE (fcf))
{
static void
dissect_ieee80211 (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree)
{
- dissect_ieee80211_common (tvb, pinfo, tree, FALSE, FALSE, FALSE);
+ dissect_ieee80211_common (tvb, pinfo, tree, FALSE, FALSE, FALSE, FALSE);
}
/*
dissect_ieee80211_radio (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree)
{
/* These packets do NOT have a FCS present */
- dissect_ieee80211_common (tvb, pinfo, tree, FALSE, TRUE, TRUE);
+ dissect_ieee80211_common (tvb, pinfo, tree, FALSE, TRUE, TRUE, FALSE);
+}
+
+/*
+ * Dissect 802.11 with a variable-length link-layer header and a byte-swapped
+ * control field (some hardware sends out LWAPP-encapsulated 802.11
+ * packets with the control field byte swapped).
+ */
+static void
+dissect_ieee80211_bsfc (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree)
+{
+ dissect_ieee80211_common (tvb, pinfo, tree, FALSE, FALSE, FALSE, TRUE);
}
/*
static void
dissect_ieee80211_fixed (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree)
{
- dissect_ieee80211_common (tvb, pinfo, tree, TRUE, FALSE, FALSE);
+ dissect_ieee80211_common (tvb, pinfo, tree, TRUE, FALSE, FALSE, FALSE);
}
static void
}
void
-proto_register_wlan (void)
+proto_register_ieee80211 (void)
{
static const value_string frame_type[] = {
{MGT_FRAME, "Management frame"},
};
static const true_false_string tods_flag = {
- "TO DS: Should be false",
- "Not used"
+ "Frame is entering DS",
+ "Frame is not entering DS"
};
static const true_false_string fromds_flag = {
- "FROM DS: Should be false",
- "Not used"
+ "Frame is exiting DS",
+ "Frame is not exiting DS"
};
static const true_false_string more_frags = {
"Channel agility not in use"
};
+ static const true_false_string short_slot_time_flags = {
+ "Short slot time in use",
+ "Short slot time not in use"
+ };
+
+ static const true_false_string dsss_ofdm_flags = {
+ "DSSS-OFDM modulation allowed",
+ "DSSS-OFDM modulation not allowed"
+ };
+
static const true_false_string cf_ibss_flags = {
"Transmitter belongs to an IBSS",
"associated stations"},
{0x12, "Association denied due to requesting station not supporting all "
"of the datarates in the BSSBasicServiceSet Parameter"},
+ {0x13, "Association denied due to requesting station not supporting "
+ "short preamble operation"},
+ {0x14, "Association denied due to requesting station not supporting "
+ "PBCC encoding"},
+ {0x15, "Association denied due to requesting station not supporting "
+ "channel agility"},
+ {0x19, "Association denied due to requesting station not supporting "
+ "short slot operation"},
+ {0x1A, "Association denied due to requesting station not supporting "
+ "DSSS-OFDM operation"},
{0x00, NULL}
};
"Sequence number", HFILL }},
{&hf_fcs,
- {"Frame Check Sequence (not verified)", "wlan.fcs", FT_UINT32, BASE_HEX,
+ {"Frame check sequence", "wlan.fcs", FT_UINT32, BASE_HEX,
NULL, 0, "FCS", HFILL }},
{&hf_fragment_overlap,
{&hf_fragment_error,
{"Defragmentation error", "wlan.fragment.error",
- FT_NONE, BASE_NONE, NULL, 0x0,
+ FT_FRAMENUM, BASE_NONE, NULL, 0x0,
"Defragmentation error due to illegal fragments", HFILL }},
{&hf_fragment,
- {"802.11 Fragment", "wlan.fragment", FT_NONE, BASE_NONE, NULL, 0x0,
+ {"802.11 Fragment", "wlan.fragment", FT_FRAMENUM, BASE_NONE, NULL, 0x0,
"802.11 Fragment", HFILL }},
{&hf_fragments,
{"802.11 Fragments", "wlan.fragments", FT_NONE, BASE_NONE, NULL, 0x0,
"802.11 Fragments", HFILL }},
+ {&hf_reassembled_in,
+ {"Reassembled 802.11 in frame", "wlan.reassembled_in", FT_FRAMENUM, BASE_NONE, NULL, 0x0,
+ "This 802.11 packet is reassembled in this frame", HFILL }},
+
{&hf_wep_iv,
{"Initialization Vector", "wlan.wep.iv", FT_UINT24, BASE_HEX, NULL, 0,
"Initialization Vector", HFILL }},
"Key", HFILL }},
{&hf_wep_icv,
- {"WEP ICV (not verified)", "wlan.wep.icv", FT_UINT32, BASE_HEX, NULL, 0,
+ {"WEP ICV", "wlan.wep.icv", FT_UINT32, BASE_HEX, NULL, 0,
"WEP ICV", HFILL }},
};
{"Capabilities", "wlan_mgt.fixed.capabilities", FT_UINT16, BASE_HEX, NULL, 0,
"Capability information", HFILL }},
+ {&ff_cf_ess,
+ {"ESS capabilities", "wlan_mgt.fixed.capabilities.ess",
+ FT_BOOLEAN, 16, TFS (&cf_ess_flags), 0x0001, "ESS capabilities", HFILL }},
+
+ {&ff_cf_ibss,
+ {"IBSS status", "wlan_mgt.fixed.capabilities.ibss",
+ FT_BOOLEAN, 16, TFS (&cf_ibss_flags), 0x0002, "IBSS participation", HFILL }},
+
{&ff_cf_sta_poll,
{"CFP participation capabilities", "wlan_mgt.fixed.capabilities.cfpoll.sta",
- FT_UINT16, BASE_HEX, VALS (&sta_cf_pollable), 0,
+ FT_UINT16, BASE_HEX, VALS (&sta_cf_pollable), 0x000C,
"CF-Poll capabilities for a STA", HFILL }},
{&ff_cf_ap_poll,
{"CFP participation capabilities", "wlan_mgt.fixed.capabilities.cfpoll.ap",
- FT_UINT16, BASE_HEX, VALS (&ap_cf_pollable), 0,
+ FT_UINT16, BASE_HEX, VALS (&ap_cf_pollable), 0x000C,
"CF-Poll capabilities for an AP", HFILL }},
- {&ff_cf_ess,
- {"ESS capabilities", "wlan_mgt.fixed.capabilities.ess",
- FT_BOOLEAN, 8, TFS (&cf_ess_flags), 0x0001, "ESS capabilities", HFILL }},
-
-
- {&ff_cf_ibss,
- {"IBSS status", "wlan_mgt.fixed.capabilities.ibss",
- FT_BOOLEAN, 8, TFS (&cf_ibss_flags), 0x0002, "IBSS participation", HFILL }},
{&ff_cf_privacy,
{"Privacy", "wlan_mgt.fixed.capabilities.privacy",
- FT_BOOLEAN, 8, TFS (&cf_privacy_flags), 0x0010, "WEP support", HFILL }},
+ FT_BOOLEAN, 16, TFS (&cf_privacy_flags), 0x0010, "WEP support", HFILL }},
{&ff_cf_preamble,
{"Short Preamble", "wlan_mgt.fixed.capabilities.preamble",
- FT_BOOLEAN, 8, TFS (&cf_preamble_flags), 0x0020, "Short Preamble", HFILL }},
+ FT_BOOLEAN, 16, TFS (&cf_preamble_flags), 0x0020, "Short Preamble", HFILL }},
{&ff_cf_pbcc,
{"PBCC", "wlan_mgt.fixed.capabilities.pbcc",
- FT_BOOLEAN, 8, TFS (&cf_pbcc_flags), 0x0040, "PBCC Modulation", HFILL }},
+ FT_BOOLEAN, 16, TFS (&cf_pbcc_flags), 0x0040, "PBCC Modulation", HFILL }},
{&ff_cf_agility,
{"Channel Agility", "wlan_mgt.fixed.capabilities.agility",
- FT_BOOLEAN, 8, TFS (&cf_agility_flags), 0x0080, "Channel Agility", HFILL }},
+ FT_BOOLEAN, 16, TFS (&cf_agility_flags), 0x0080, "Channel Agility", HFILL }},
+
+ {&ff_short_slot_time,
+ {"Short Slot Time", "wlan_mgt.fixed.capabilities.short_slot_time",
+ FT_BOOLEAN, 16, TFS (&short_slot_time_flags), 0x0400, "Short Slot Time",
+ HFILL }},
+
+ {&ff_dsss_ofdm,
+ {"DSSS-OFDM", "wlan_mgt.fixed.capabilities.dsss_ofdm",
+ FT_BOOLEAN, 16, TFS (&dsss_ofdm_flags), 0x2000, "DSSS-OFDM Modulation",
+ HFILL }},
{&ff_auth_seq,
{"Authentication SEQ", "wlan_mgt.fixed.auth_seq",
{&tag_number,
{"Tag", "wlan_mgt.tag.number",
- FT_UINT16, BASE_DEC, NULL, 0,
+ FT_UINT8, BASE_DEC, VALS(tag_num_vals), 0,
"Element ID", HFILL }},
{&tag_length,
{"Tag length", "wlan_mgt.tag.length",
- FT_UINT16, BASE_DEC, NULL, 0, "Length of tag", HFILL }},
+ FT_UINT8, BASE_DEC, NULL, 0, "Length of tag", HFILL }},
{&tag_interpretation,
{"Tag interpretation", "wlan_mgt.tag.interpretation",
register_dissector("wlan", dissect_ieee80211, proto_wlan);
register_dissector("wlan_fixed", dissect_ieee80211_fixed, proto_wlan);
+ register_dissector("wlan_bsfc", dissect_ieee80211_bsfc, proto_wlan);
register_init_routine(wlan_defragment_init);
/* Register configuration options */
- wlan_module = prefs_register_protocol(proto_wlan, NULL);
+ wlan_module = prefs_register_protocol(proto_wlan, init_wepkeys);
prefs_register_bool_preference(wlan_module, "defragment",
"Reassemble fragmented 802.11 datagrams",
"Whether fragmented 802.11 datagrams should be reassembled",
&wlan_ignore_wep);
#ifndef USE_ENV
- prefs_register_enum_preference(wlan_module, "wep_keys",
+ prefs_register_enum_preference(wlan_module, "wep_keys",
"WEP key count",
"How many WEP keys do we have to choose from? (0 to disable, up to 4)",
&num_wepkeys, wep_keys_options, FALSE);
prefs_register_string_preference(wlan_module, "wep_key1",
"WEP key #1",
- "First WEP key (A:B:C:D:E:F)",
+ "First WEP key (A:B:C:D:E) [40bit], (A:B:C:D:E:F:G:H:I:J:K:L:M) [104bit], or whatever key length you're using",
&wep_keystr[0]);
prefs_register_string_preference(wlan_module, "wep_key2",
"WEP key #2",
- "Second WEP key (A:B:C:D:E:F)",
+ "Second WEP key (A:B:C:D:E) [40bit], (A:B:C:D:E:F:G:H:I:J:K:L:M) [104bit], or whatever key length you're using",
&wep_keystr[1]);
prefs_register_string_preference(wlan_module, "wep_key3",
"WEP key #3",
- "Third WEP key (A:B:C:D:E:F)",
+ "Third WEP key (A:B:C:D:E) [40bit], (A:B:C:D:E:F:G:H:I:J:K:L:M) [104bit], or whatever key length you're using",
&wep_keystr[2]);
prefs_register_string_preference(wlan_module, "wep_key4",
"WEP key #4",
- "Fourth WEP key (A:B:C:D:E:F)",
+ "Fourth WEP key (A:B:C:D:E) [40bit] (A:B:C:D:E:F:G:H:I:J:K:L:M) [104bit], or whatever key length you're using",
&wep_keystr[3]);
#endif
}
void
-proto_reg_handoff_wlan(void)
+proto_reg_handoff_ieee80211(void)
{
dissector_handle_t ieee80211_handle;
dissector_handle_t ieee80211_radio_handle;
ieee80211_radio_handle);
}
-static const guint32 wep_crc32_table[256] = {
- 0x00000000L, 0x77073096L, 0xee0e612cL, 0x990951baL, 0x076dc419L,
- 0x706af48fL, 0xe963a535L, 0x9e6495a3L, 0x0edb8832L, 0x79dcb8a4L,
- 0xe0d5e91eL, 0x97d2d988L, 0x09b64c2bL, 0x7eb17cbdL, 0xe7b82d07L,
- 0x90bf1d91L, 0x1db71064L, 0x6ab020f2L, 0xf3b97148L, 0x84be41deL,
- 0x1adad47dL, 0x6ddde4ebL, 0xf4d4b551L, 0x83d385c7L, 0x136c9856L,
- 0x646ba8c0L, 0xfd62f97aL, 0x8a65c9ecL, 0x14015c4fL, 0x63066cd9L,
- 0xfa0f3d63L, 0x8d080df5L, 0x3b6e20c8L, 0x4c69105eL, 0xd56041e4L,
- 0xa2677172L, 0x3c03e4d1L, 0x4b04d447L, 0xd20d85fdL, 0xa50ab56bL,
- 0x35b5a8faL, 0x42b2986cL, 0xdbbbc9d6L, 0xacbcf940L, 0x32d86ce3L,
- 0x45df5c75L, 0xdcd60dcfL, 0xabd13d59L, 0x26d930acL, 0x51de003aL,
- 0xc8d75180L, 0xbfd06116L, 0x21b4f4b5L, 0x56b3c423L, 0xcfba9599L,
- 0xb8bda50fL, 0x2802b89eL, 0x5f058808L, 0xc60cd9b2L, 0xb10be924L,
- 0x2f6f7c87L, 0x58684c11L, 0xc1611dabL, 0xb6662d3dL, 0x76dc4190L,
- 0x01db7106L, 0x98d220bcL, 0xefd5102aL, 0x71b18589L, 0x06b6b51fL,
- 0x9fbfe4a5L, 0xe8b8d433L, 0x7807c9a2L, 0x0f00f934L, 0x9609a88eL,
- 0xe10e9818L, 0x7f6a0dbbL, 0x086d3d2dL, 0x91646c97L, 0xe6635c01L,
- 0x6b6b51f4L, 0x1c6c6162L, 0x856530d8L, 0xf262004eL, 0x6c0695edL,
- 0x1b01a57bL, 0x8208f4c1L, 0xf50fc457L, 0x65b0d9c6L, 0x12b7e950L,
- 0x8bbeb8eaL, 0xfcb9887cL, 0x62dd1ddfL, 0x15da2d49L, 0x8cd37cf3L,
- 0xfbd44c65L, 0x4db26158L, 0x3ab551ceL, 0xa3bc0074L, 0xd4bb30e2L,
- 0x4adfa541L, 0x3dd895d7L, 0xa4d1c46dL, 0xd3d6f4fbL, 0x4369e96aL,
- 0x346ed9fcL, 0xad678846L, 0xda60b8d0L, 0x44042d73L, 0x33031de5L,
- 0xaa0a4c5fL, 0xdd0d7cc9L, 0x5005713cL, 0x270241aaL, 0xbe0b1010L,
- 0xc90c2086L, 0x5768b525L, 0x206f85b3L, 0xb966d409L, 0xce61e49fL,
- 0x5edef90eL, 0x29d9c998L, 0xb0d09822L, 0xc7d7a8b4L, 0x59b33d17L,
- 0x2eb40d81L, 0xb7bd5c3bL, 0xc0ba6cadL, 0xedb88320L, 0x9abfb3b6L,
- 0x03b6e20cL, 0x74b1d29aL, 0xead54739L, 0x9dd277afL, 0x04db2615L,
- 0x73dc1683L, 0xe3630b12L, 0x94643b84L, 0x0d6d6a3eL, 0x7a6a5aa8L,
- 0xe40ecf0bL, 0x9309ff9dL, 0x0a00ae27L, 0x7d079eb1L, 0xf00f9344L,
- 0x8708a3d2L, 0x1e01f268L, 0x6906c2feL, 0xf762575dL, 0x806567cbL,
- 0x196c3671L, 0x6e6b06e7L, 0xfed41b76L, 0x89d32be0L, 0x10da7a5aL,
- 0x67dd4accL, 0xf9b9df6fL, 0x8ebeeff9L, 0x17b7be43L, 0x60b08ed5L,
- 0xd6d6a3e8L, 0xa1d1937eL, 0x38d8c2c4L, 0x4fdff252L, 0xd1bb67f1L,
- 0xa6bc5767L, 0x3fb506ddL, 0x48b2364bL, 0xd80d2bdaL, 0xaf0a1b4cL,
- 0x36034af6L, 0x41047a60L, 0xdf60efc3L, 0xa867df55L, 0x316e8eefL,
- 0x4669be79L, 0xcb61b38cL, 0xbc66831aL, 0x256fd2a0L, 0x5268e236L,
- 0xcc0c7795L, 0xbb0b4703L, 0x220216b9L, 0x5505262fL, 0xc5ba3bbeL,
- 0xb2bd0b28L, 0x2bb45a92L, 0x5cb36a04L, 0xc2d7ffa7L, 0xb5d0cf31L,
- 0x2cd99e8bL, 0x5bdeae1dL, 0x9b64c2b0L, 0xec63f226L, 0x756aa39cL,
- 0x026d930aL, 0x9c0906a9L, 0xeb0e363fL, 0x72076785L, 0x05005713L,
- 0x95bf4a82L, 0xe2b87a14L, 0x7bb12baeL, 0x0cb61b38L, 0x92d28e9bL,
- 0xe5d5be0dL, 0x7cdcefb7L, 0x0bdbdf21L, 0x86d3d2d4L, 0xf1d4e242L,
- 0x68ddb3f8L, 0x1fda836eL, 0x81be16cdL, 0xf6b9265bL, 0x6fb077e1L,
- 0x18b74777L, 0x88085ae6L, 0xff0f6a70L, 0x66063bcaL, 0x11010b5cL,
- 0x8f659effL, 0xf862ae69L, 0x616bffd3L, 0x166ccf45L, 0xa00ae278L,
- 0xd70dd2eeL, 0x4e048354L, 0x3903b3c2L, 0xa7672661L, 0xd06016f7L,
- 0x4969474dL, 0x3e6e77dbL, 0xaed16a4aL, 0xd9d65adcL, 0x40df0b66L,
- 0x37d83bf0L, 0xa9bcae53L, 0xdebb9ec5L, 0x47b2cf7fL, 0x30b5ffe9L,
- 0xbdbdf21cL, 0xcabac28aL, 0x53b39330L, 0x24b4a3a6L, 0xbad03605L,
- 0xcdd70693L, 0x54de5729L, 0x23d967bfL, 0xb3667a2eL, 0xc4614ab8L,
- 0x5d681b02L, 0x2a6f2b94L, 0xb40bbe37L, 0xc30c8ea1L, 0x5a05df1bL,
- 0x2d02ef8dL
-};
-
static tvbuff_t *try_decrypt_wep(tvbuff_t *tvb, guint32 offset, guint32 len) {
guint8 *tmp = NULL;
int i;
if (num_wepkeys < 1)
return NULL;
- if (wep_keylens == NULL)
- init_wepkeys();
if ((tmp = g_malloc(len)) == NULL)
return NULL; /* krap! */
-
+
/* try once with the key index in the packet, then look through our list. */
for (i = -1; i < (int) num_wepkeys; i++) {
/* copy the encrypted data over to the tmp buffer */
}
done:
- if ((!decr_tvb) && (tmp)) free(tmp);
+ if ((!decr_tvb) && (tmp)) g_free(tmp);
#if 0
printf("de-wep %p\n", decr_tvb);
-#endif
+#endif
return decr_tvb;
}
#if 0
printf("%02x\n", *dpos);
#endif
- crc = wep_crc32_table[(crc ^ *dpos++) & 0xff] ^ (crc >> 8);
+ crc = crc32_table[(crc ^ *dpos++) & 0xff] ^ (crc >> 8);
}
crc = ~crc;
c_crc[1] = crc >> 8;
c_crc[2] = crc >> 16;
c_crc[3] = crc >> 24;
-
+
for (k = 0; k < 4; k++) {
i = (i + 1) & 0xff;
j = (j+s[i]) & 0xff;
return 0;
}
-/* XXX need to verify these malloc()s succeed */
-
static void init_wepkeys(void) {
char *tmp, *tmp2;
guint8 *tmp3;
- uint i, j;
+ guint i, j;
#ifdef USE_ENV
guint8 buf[128];
if (num_wepkeys < 1)
return;
- if (wep_keylens != NULL)
- return;
+ if (wep_keys)
+ g_free(wep_keys);
- wep_keys = malloc(num_wepkeys * sizeof(guint8*));
- wep_keylens = malloc(num_wepkeys * sizeof(int));
+ if (wep_keylens)
+ g_free(wep_keylens);
+
+ wep_keys = g_malloc(num_wepkeys * sizeof(guint8*));
+ wep_keylens = g_malloc(num_wepkeys * sizeof(int));
for (i = 0 ; i < num_wepkeys; i++) {
wep_keys[i] = NULL;
#endif
#endif
- wep_keys[i] = malloc(32 * sizeof(guint8));
+ if (wep_keys[i])
+ g_free(wep_keys[i]);
+ wep_keys[i] = g_malloc(32 * sizeof(guint8));
memset(wep_keys[i], 0, 32 * sizeof(guint8));
tmp3 = wep_keys[i];
while ((tmp != NULL) && (*tmp != 0)) {
j++;
}
}
-
+
}
return;
git.samba.org / obnox / wireshark / wip.git / blobdiff