forked from osmocom/wireshark
2923 lines
122 KiB
C
2923 lines
122 KiB
C
/* packet-ieee802154.c
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*
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* Auxiliary Security Header support and
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* option to force TI CC24xx FCS format
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* By Jean-Francois Wauthy <jfw@info.fundp.ac.be>
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* Copyright 2009 The University of Namur, Belgium
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*
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* IEEE 802.15.4 Dissectors for Wireshark
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* By Owen Kirby <osk@exegin.com>
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* Copyright 2007 Exegin Technologies Limited
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*------------------------------------------------------------
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*
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* In IEEE 802.15.4 packets, all fields are little endian. And
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* Each byte is transmitted least significant bit first (reflected
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* bit ordering).
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*------------------------------------------------------------
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*
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* IEEE 802.15.4 Packets have the following format:
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* | FCF |Seq No| Addressing | Data | FCS |
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* |2 bytes|1 byte|0 to 20 bytes|Length-(Overhead) bytes|2 Bytes|
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*------------------------------------------------------------
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*
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* CRC16 is calculated using the x^16 + x^12 + x^5 + 1 polynomial
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* as specified by ITU-T, and is calculated over the IEEE 802.15.4
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* packet (excluding the FCS) as transmitted over the air. Note,
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* that because the least significan bits are transmitted first, this
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* will require reversing the bit-order in each byte. Also, unlike
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* most CRC algorithms, IEEE 802.15.4 uses an initial and final value
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* of 0x0000, instead of 0xffff (which is used by the CCITT).
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*------------------------------------------------------------
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*
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* This dissector supports both link-layer IEEE 802.15.4 captures
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* and IEEE 802.15.4 packets encapsulated within other layers.
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* Additionally, support has been provided for various formats
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* of the frame check sequence:
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* - IEEE 802.15.4 compliant FCS.
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* - ChipCon/Texas Instruments CC24xx style FCS.
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*------------------------------------------------------------
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*/
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/* Include files */
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#include "config.h"
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#include <epan/packet.h>
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#include <epan/decode_as.h>
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#include <epan/exceptions.h>
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#include <epan/crc16-tvb.h>
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#include <epan/expert.h>
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#include <epan/addr_resolv.h>
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#include <epan/address_types.h>
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#include <epan/prefs.h>
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#include <epan/uat.h>
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#include <epan/strutil.h>
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#include <epan/to_str-int.h>
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#include <epan/show_exception.h>
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#include <wsutil/pint.h>
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/* Use libgcrypt for cipher libraries. */
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#ifdef HAVE_LIBGCRYPT
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#include <wsutil/wsgcrypt.h>
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#endif /* HAVE_LIBGCRYPT */
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#include "packet-ieee802154.h"
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#include "packet-sll.h"
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void proto_register_ieee802154(void);
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void proto_reg_handoff_ieee802154(void);
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/* Dissection Options for dissect_ieee802154_common */
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#define DISSECT_IEEE802154_OPTION_CC24xx 0x00000001 /* FCS field contains a TI CC24xx style FCS. */
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#define DISSECT_IEEE802154_OPTION_LINUX 0x00000002 /* Addressing fields are padded DLT_IEEE802_15_4_LINUX, not implemented. */
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/* ethertype for 802.15.4 tag - encapsulating an Ethernet packet */
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static unsigned int ieee802154_ethertype = 0x809A;
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/* boolean value set if the FCS field is using the TI CC24xx format */
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static gboolean ieee802154_cc24xx = FALSE;
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/* boolean value set if the FCS must be ok before payload is dissected */
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static gboolean ieee802154_fcs_ok = TRUE;
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/* User string with the decryption key. */
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static const gchar *ieee802154_key_str = NULL;
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static gboolean ieee802154_key_valid;
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static guint8 ieee802154_key[IEEE802154_CIPHER_SIZE];
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static const char *ieee802154_user = "User";
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/*-------------------------------------
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* Address Hash Tables
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*-------------------------------------
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*/
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static ieee802154_map_tab_t ieee802154_map = { NULL, NULL };
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/*-------------------------------------
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* Static Address Mapping UAT
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*-------------------------------------
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*/
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/* UAT entry structure. */
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typedef struct {
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guchar *eui64;
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guint eui64_len;
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guint addr16;
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guint pan;
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} static_addr_t;
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/* UAT variables */
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static uat_t *static_addr_uat = NULL;
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static static_addr_t *static_addrs = NULL;
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static guint num_static_addrs = 0;
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/* Sanity-checks a UAT record. */
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static gboolean
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addr_uat_update_cb(void *r, char **err)
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{
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static_addr_t *map = (static_addr_t *)r;
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/* Ensure a valid short address */
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if (map->addr16 >= IEEE802154_NO_ADDR16) {
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*err = g_strdup("Invalid short address");
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return FALSE;
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}
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/* Ensure a valid PAN identifier. */
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if (map->pan >= IEEE802154_BCAST_PAN) {
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*err = g_strdup("Invalid PAN identifier");
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return FALSE;
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}
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/* Ensure a valid EUI-64 length */
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if (map->eui64_len != sizeof(guint64)) {
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*err = g_strdup("Invalid EUI-64 length");
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return FALSE;
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}
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return TRUE;
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} /* ieee802154_addr_uat_update_cb */
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/* Field callbacks. */
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UAT_HEX_CB_DEF(addr_uat, addr16, static_addr_t)
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UAT_HEX_CB_DEF(addr_uat, pan, static_addr_t)
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UAT_BUFFER_CB_DEF(addr_uat, eui64, static_addr_t, eui64, eui64_len)
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/*-------------------------------------
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* Dissector Function Prototypes
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*-------------------------------------
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*/
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/* Dissection Routines. */
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static void dissect_ieee802154_nonask_phy (tvbuff_t *, packet_info *, proto_tree *);
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static void dissect_ieee802154 (tvbuff_t *, packet_info *, proto_tree *);
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static void dissect_ieee802154_nofcs (tvbuff_t *, packet_info *, proto_tree *);
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static void dissect_ieee802154_cc24xx (tvbuff_t *, packet_info *, proto_tree *);
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/*static void dissect_ieee802154_linux (tvbuff_t *, packet_info *, proto_tree *); TODO: Implement Me. */
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static void dissect_ieee802154_common (tvbuff_t *, packet_info *, proto_tree *, guint);
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/* Sub-dissector helpers. */
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static void dissect_ieee802154_fcf (tvbuff_t *, packet_info *, proto_tree *, ieee802154_packet *, guint *);
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static void dissect_ieee802154_superframe (tvbuff_t *, packet_info *, proto_tree *, guint *);
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static void dissect_ieee802154_gtsinfo (tvbuff_t *, packet_info *, proto_tree *, guint *);
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static void dissect_ieee802154_pendaddr (tvbuff_t *, packet_info *, proto_tree *, guint *);
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static void dissect_ieee802154_command (tvbuff_t *, packet_info *, proto_tree *, ieee802154_packet *);
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static void dissect_ieee802154_assoc_req (tvbuff_t *, packet_info *, proto_tree *, ieee802154_packet *);
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static void dissect_ieee802154_assoc_rsp (tvbuff_t *, packet_info *, proto_tree *, ieee802154_packet *);
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static void dissect_ieee802154_disassoc (tvbuff_t *, packet_info *, proto_tree *, ieee802154_packet *);
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static void dissect_ieee802154_realign (tvbuff_t *, packet_info *, proto_tree *, ieee802154_packet *);
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static void dissect_ieee802154_gtsreq (tvbuff_t *, packet_info *, proto_tree *, ieee802154_packet *);
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/* Decryption helpers. */
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typedef enum {
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DECRYPT_PACKET_SUCCEEDED,
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DECRYPT_NOT_ENCRYPTED,
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DECRYPT_VERSION_UNSUPPORTED,
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DECRYPT_PACKET_TOO_SMALL,
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DECRYPT_PACKET_NO_EXT_SRC_ADDR,
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DECRYPT_PACKET_NO_KEY,
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DECRYPT_PACKET_DECRYPT_FAILED,
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DECRYPT_PACKET_MIC_CHECK_FAILED
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} ws_decrypt_status;
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static tvbuff_t *dissect_ieee802154_decrypt(tvbuff_t *, guint, packet_info *, ieee802154_packet *,
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ws_decrypt_status *);
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static void ccm_init_block (gchar *, gboolean, gint, guint64, ieee802154_packet *, gint);
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static gboolean ccm_ctr_encrypt (const gchar *, const gchar *, gchar *, gchar *, gint);
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static gboolean ccm_cbc_mac (const gchar *, const gchar *, const gchar *, gint, const gchar *, gint, gchar *);
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/* Initialize Protocol and Registered fields */
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static int proto_ieee802154_nonask_phy = -1;
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static int hf_ieee802154_nonask_phy_preamble = -1;
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static int hf_ieee802154_nonask_phy_sfd = -1;
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static int hf_ieee802154_nonask_phy_length = -1;
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static int hf_ieee802154_nonask_phr = -1;
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static int proto_ieee802154 = -1;
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static int hf_ieee802154_frame_length = -1;
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static int hf_ieee802154_fcf = -1;
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static int hf_ieee802154_frame_type = -1;
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static int hf_ieee802154_security = -1;
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static int hf_ieee802154_pending = -1;
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static int hf_ieee802154_ack_request = -1;
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static int hf_ieee802154_intra_pan = -1;
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static int hf_ieee802154_seqno = -1;
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static int hf_ieee802154_src_addr_mode = -1;
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static int hf_ieee802154_dst_addr_mode = -1;
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static int hf_ieee802154_version = -1;
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static int hf_ieee802154_dst_panID = -1;
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static int hf_ieee802154_dst16 = -1;
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static int hf_ieee802154_dst64 = -1;
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static int hf_ieee802154_src_panID = -1;
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static int hf_ieee802154_src16 = -1;
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static int hf_ieee802154_src64 = -1;
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static int hf_ieee802154_src64_origin = -1;
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static int hf_ieee802154_fcs = -1;
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static int hf_ieee802154_rssi = -1;
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static int hf_ieee802154_fcs_ok = -1;
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static int hf_ieee802154_correlation = -1;
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/* Registered fields for Command Packets */
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static int hf_ieee802154_cmd_id = -1;
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static int hf_ieee802154_cinfo_alt_coord = -1;
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static int hf_ieee802154_cinfo_device_type = -1;
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static int hf_ieee802154_cinfo_power_src = -1;
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static int hf_ieee802154_cinfo_idle_rx = -1;
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static int hf_ieee802154_cinfo_sec_capable = -1;
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static int hf_ieee802154_cinfo_alloc_addr = -1;
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static int hf_ieee802154_assoc_addr = -1;
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static int hf_ieee802154_assoc_status = -1;
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static int hf_ieee802154_disassoc_reason = -1;
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static int hf_ieee802154_realign_pan = -1;
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static int hf_ieee802154_realign_caddr = -1;
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static int hf_ieee802154_realign_channel = -1;
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static int hf_ieee802154_realign_addr = -1;
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static int hf_ieee802154_realign_channel_page = -1;
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static int hf_ieee802154_gtsreq_len = -1;
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static int hf_ieee802154_gtsreq_dir = -1;
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static int hf_ieee802154_gtsreq_type = -1;
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/* Registered fields for Beacon Packets */
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static int hf_ieee802154_beacon_order = -1;
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static int hf_ieee802154_superframe_order = -1;
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static int hf_ieee802154_cap = -1;
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static int hf_ieee802154_superframe_battery_ext = -1;
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static int hf_ieee802154_superframe_coord = -1;
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static int hf_ieee802154_assoc_permit = -1;
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static int hf_ieee802154_gts_count = -1;
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static int hf_ieee802154_gts_permit = -1;
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static int hf_ieee802154_gts_direction = -1;
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static int hf_ieee802154_gts_address = -1;
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static int hf_ieee802154_pending16 = -1;
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static int hf_ieee802154_pending64 = -1;
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/* Registered fields for Auxiliary Security Header */
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static int hf_ieee802154_security_control_field = -1;
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static int hf_ieee802154_security_level = -1;
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static int hf_ieee802154_key_id_mode = -1;
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static int hf_ieee802154_aux_sec_reserved = -1;
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static int hf_ieee802154_aux_sec_frame_counter = -1;
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static int hf_ieee802154_aux_sec_key_source = -1;
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static int hf_ieee802154_aux_sec_key_index = -1;
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/* 802.15.4-2003 security */
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static int hf_ieee802154_sec_frame_counter = -1;
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static int hf_ieee802154_sec_key_sequence_counter = -1;
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/* Initialize Subtree Pointers */
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static gint ett_ieee802154_nonask_phy = -1;
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static gint ett_ieee802154_nonask_phy_phr = -1;
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static gint ett_ieee802154 = -1;
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static gint ett_ieee802154_fcf = -1;
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static gint ett_ieee802154_auxiliary_security = -1;
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static gint ett_ieee802154_aux_sec_control = -1;
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static gint ett_ieee802154_aux_sec_key_id = -1;
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static gint ett_ieee802154_fcs = -1;
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static gint ett_ieee802154_cmd = -1;
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static gint ett_ieee802154_superframe = -1;
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static gint ett_ieee802154_gts = -1;
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static gint ett_ieee802154_gts_direction = -1;
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static gint ett_ieee802154_gts_descriptors = -1;
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static gint ett_ieee802154_pendaddr = -1;
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static expert_field ei_ieee802154_invalid_addressing = EI_INIT;
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static expert_field ei_ieee802154_fcs = EI_INIT;
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static expert_field ei_ieee802154_decrypt_error = EI_INIT;
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static expert_field ei_ieee802154_dst = EI_INIT;
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static expert_field ei_ieee802154_src = EI_INIT;
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static int ieee802_15_4_short_address_type = -1;
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/*
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* Dissector handles
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* - beacon dissection is always heuristic.
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* - the PANID table is for stateful dissectors only (ie: Decode-As)
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* - otherwise, data dissectors fall back to the heuristic dissectors.
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*/
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static dissector_handle_t data_handle;
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static dissector_table_t panid_dissector_table;
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static heur_dissector_list_t ieee802154_beacon_subdissector_list;
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static heur_dissector_list_t ieee802154_heur_subdissector_list;
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/* Name Strings */
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static const value_string ieee802154_frame_types[] = {
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{ IEEE802154_FCF_BEACON, "Beacon" },
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{ IEEE802154_FCF_DATA, "Data" },
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{ IEEE802154_FCF_ACK, "Ack" },
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{ IEEE802154_FCF_CMD, "Command" },
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{ 0, NULL }
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};
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static const value_string ieee802154_addr_modes[] = {
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{ IEEE802154_FCF_ADDR_NONE, "None" },
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{ IEEE802154_FCF_ADDR_SHORT,"Short/16-bit" },
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{ IEEE802154_FCF_ADDR_EXT, "Long/64-bit" },
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{ 0, NULL }
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};
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static const value_string ieee802154_cmd_names[] = {
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{ IEEE802154_CMD_ASRQ, "Association Request" },
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{ IEEE802154_CMD_ASRSP, "Association Response" },
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{ IEEE802154_CMD_DISAS, "Disassociation Notification" },
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{ IEEE802154_CMD_DATA_RQ, "Data Request" },
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{ IEEE802154_CMD_PANID_ERR, "PAN ID Conflict" },
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{ IEEE802154_CMD_ORPH_NOTIF,"Orphan Notification" },
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{ IEEE802154_CMD_BCN_RQ, "Beacon Request" },
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{ IEEE802154_CMD_COORD_REAL,"Coordinator Realignment" },
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{ IEEE802154_CMD_GTS_REQ, "GTS Request" },
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{ 0, NULL }
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};
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static const value_string ieee802154_sec_level_names[] = {
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{ SECURITY_LEVEL_NONE, "No Security" },
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{ SECURITY_LEVEL_MIC_32, "32-bit Message Integrity Code" },
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{ SECURITY_LEVEL_MIC_64, "64-bit Message Integrity Code" },
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{ SECURITY_LEVEL_MIC_128, "128-bit Message Integrity Code" },
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{ SECURITY_LEVEL_ENC, "Encryption" },
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{ SECURITY_LEVEL_ENC_MIC_32, "Encryption with 32-bit Message Integrity Code" },
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{ SECURITY_LEVEL_ENC_MIC_64, "Encryption with 64-bit Message Integrity Code" },
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{ SECURITY_LEVEL_ENC_MIC_128, "Encryption with 128-bit Message Integrity Code" },
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{ 0, NULL }
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};
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static const value_string ieee802154_key_id_mode_names[] = {
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{ KEY_ID_MODE_IMPLICIT, "Implicit Key" },
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{ KEY_ID_MODE_KEY_INDEX, "Indexed Key using the Default Key Source" },
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{ KEY_ID_MODE_KEY_EXPLICIT_4, "Explicit Key with 4-octet Key Source" },
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{ KEY_ID_MODE_KEY_EXPLICIT_8, "Explicit Key with 8-octet Key Source" },
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{ 0, NULL }
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};
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static const true_false_string ieee802154_gts_direction_tfs = {
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"Receive Only",
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"Transmit Only"
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};
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/* The 802.15.4-2003 security suites for the security preferences (only AES-CCM suites are supported). */
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/* NOTE: The equivalent 2006 security level identifer enumerations are used to simplify 2003 & 2006 integration! */
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static const enum_val_t ieee802154_2003_sec_suite_enums[] = {
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{ "AES-CCM-128", "AES-128 Encryption, 128-bit Integrity Protection", SECURITY_LEVEL_ENC_MIC_128 },
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{ "AES-CCM-64", "AES-128 Encryption, 64-bit Integrity Protection", SECURITY_LEVEL_ENC_MIC_64 },
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{ "AES-CCM-32", "AES-128 Encryption, 32-bit Integrity Protection", SECURITY_LEVEL_ENC_MIC_32 },
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{ NULL, NULL, 0 }
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};
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/* Preferences for 2003 security */
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static gint ieee802154_sec_suite = SECURITY_LEVEL_ENC_MIC_64;
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static gboolean ieee802154_extend_auth = TRUE;
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/* Macro to check addressing, and throw a warning flag if incorrect. */
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#define IEEE802154_CMD_ADDR_CHECK(_pinfo_, _item_, _cmdid_, _x_) \
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if (!(_x_)) \
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expert_add_info_format(_pinfo_, _item_, &ei_ieee802154_invalid_addressing, \
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"Invalid Addressing for %s", \
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val_to_str_const(_cmdid_, ieee802154_cmd_names, "Unknown Command"))
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/* CRC definitions. IEEE 802.15.4 CRCs vary from CCITT by using an initial value of
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* 0x0000, and no XOR out. IEEE802154_CRC_XOR is defined as 0xFFFF in order to un-XOR
|
|
* the output from the CCITT CRC routines in Wireshark.
|
|
*/
|
|
#define IEEE802154_CRC_SEED 0x0000
|
|
#define IEEE802154_CRC_XOROUT 0xFFFF
|
|
#define ieee802154_crc_tvb(tvb, offset) (crc16_ccitt_tvb_seed(tvb, offset, IEEE802154_CRC_SEED) ^ IEEE802154_CRC_XOROUT)
|
|
|
|
|
|
static int ieee802_15_4_short_address_to_str(const address* addr, gchar *buf, int buf_len)
|
|
{
|
|
guint16 ieee_802_15_4_short_addr = pletoh16(addr->data);
|
|
|
|
if (ieee_802_15_4_short_addr == 0xffff)
|
|
{
|
|
g_strlcpy(buf, "Broadcast", buf_len);
|
|
return 10;
|
|
}
|
|
|
|
*buf++ = '0';
|
|
*buf++ = 'x';
|
|
buf = word_to_hex(buf, ieee_802_15_4_short_addr);
|
|
*buf = '\0'; /* NULL terminate */
|
|
|
|
return 7;
|
|
}
|
|
|
|
static int ieee802_15_4_short_address_str_len(const address* addr _U_)
|
|
{
|
|
return 11;
|
|
}
|
|
|
|
static int ieee802_15_4_short_address_len(void)
|
|
{
|
|
return 2;
|
|
}
|
|
|
|
|
|
/*FUNCTION:------------------------------------------------------
|
|
* NAME
|
|
* dissect_ieee802154_fcf
|
|
* DESCRIPTION
|
|
* Dissector helper, parses and displays the frame control
|
|
* field.
|
|
*
|
|
* PARAMETERS
|
|
* ieee802154_packet *packet - Packet info structure.
|
|
* tvbuff_t *tvb - pointer to buffer containing raw packet.
|
|
* packet_info *pinfo - pointer to packet information fields
|
|
* proto_tree *tree - pointer to data tree wireshark uses to display packet.
|
|
* ieee802154_packet *packet - IEEE 802.15.4 packet information.
|
|
* guint offset - offset into the tvb to find the FCF.
|
|
* RETURNS
|
|
* void
|
|
*---------------------------------------------------------------
|
|
*/
|
|
static void
|
|
dissect_ieee802154_fcf(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, ieee802154_packet *packet, guint *offset)
|
|
{
|
|
guint16 fcf;
|
|
static const int * fields[] = {
|
|
&hf_ieee802154_frame_type,
|
|
&hf_ieee802154_security,
|
|
&hf_ieee802154_pending,
|
|
&hf_ieee802154_ack_request,
|
|
&hf_ieee802154_intra_pan,
|
|
&hf_ieee802154_dst_addr_mode,
|
|
&hf_ieee802154_version,
|
|
&hf_ieee802154_src_addr_mode,
|
|
NULL
|
|
};
|
|
|
|
/* Get the FCF field. */
|
|
fcf = tvb_get_letohs(tvb, *offset);
|
|
|
|
/* Parse FCF Flags. */
|
|
packet->frame_type = fcf & IEEE802154_FCF_TYPE_MASK;
|
|
packet->security_enable = fcf & IEEE802154_FCF_SEC_EN;
|
|
packet->frame_pending = fcf & IEEE802154_FCF_FRAME_PND;
|
|
packet->ack_request = fcf & IEEE802154_FCF_ACK_REQ;
|
|
packet->intra_pan = fcf & IEEE802154_FCF_INTRA_PAN;
|
|
packet->version = (fcf & IEEE802154_FCF_VERSION) >> 12;
|
|
packet->dst_addr_mode = (fcf & IEEE802154_FCF_DADDR_MASK) >> 10;
|
|
packet->src_addr_mode = (fcf & IEEE802154_FCF_SADDR_MASK) >> 14;
|
|
|
|
/* Display the frame type. */
|
|
proto_item_append_text(tree, " %s", val_to_str_const(packet->frame_type, ieee802154_frame_types, "Reserved"));
|
|
col_set_str(pinfo->cinfo, COL_INFO, val_to_str_const(packet->frame_type, ieee802154_frame_types, "Reserved"));
|
|
|
|
proto_tree_add_bitmask(tree, tvb, *offset, hf_ieee802154_fcf,
|
|
ett_ieee802154_fcf, fields, ENC_LITTLE_ENDIAN);
|
|
|
|
*offset += 2;
|
|
} /* dissect_ieee802154_fcf */
|
|
|
|
/*FUNCTION:------------------------------------------------------
|
|
* NAME
|
|
* dissect_ieee802154_nonask_phy
|
|
* DESCRIPTION
|
|
* Dissector for IEEE 802.15.4 non-ASK PHY packet with an FCS containing
|
|
* a 16-bit CRC value.
|
|
*
|
|
* PARAMETERS
|
|
* tvbuff_t *tvb - pointer to buffer containing raw packet.
|
|
* packet_info *pinfo - pointer to packet information fields
|
|
* proto_tree *tree - pointer to data tree wireshark uses to display packet.
|
|
* RETURNS
|
|
* void
|
|
*---------------------------------------------------------------
|
|
*/
|
|
static void
|
|
dissect_ieee802154_nonask_phy(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
|
|
{
|
|
proto_tree *ieee802154_tree = NULL;
|
|
proto_item *proto_root = NULL;
|
|
|
|
guint offset = 0;
|
|
guint8 phr;
|
|
tvbuff_t* mac;
|
|
|
|
/* Create the protocol tree. */
|
|
if (tree) {
|
|
proto_root = proto_tree_add_protocol_format(tree, proto_ieee802154_nonask_phy, tvb, 0, tvb_length(tvb), "IEEE 802.15.4 non-ASK PHY");
|
|
ieee802154_tree = proto_item_add_subtree(proto_root, ett_ieee802154_nonask_phy);
|
|
}
|
|
|
|
/* Add the protocol name. */
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "IEEE 802.15.4 non-ASK PHY");
|
|
/* Add the packet length. */
|
|
col_add_fstr(pinfo->cinfo, COL_PACKET_LENGTH, "%i", tvb_length(tvb));
|
|
|
|
phr=tvb_get_guint8(tvb,offset+4+1);
|
|
|
|
if(tree) {
|
|
guint loffset=offset;
|
|
static const int * phr_fields[] = {
|
|
&hf_ieee802154_nonask_phy_length,
|
|
NULL
|
|
};
|
|
|
|
proto_tree_add_item(ieee802154_tree, hf_ieee802154_nonask_phy_preamble, tvb, loffset, 4, ENC_LITTLE_ENDIAN);
|
|
loffset+=4;
|
|
proto_tree_add_item(ieee802154_tree, hf_ieee802154_nonask_phy_sfd, tvb, loffset, 1, ENC_LITTLE_ENDIAN);
|
|
loffset+=1;
|
|
|
|
proto_tree_add_bitmask(ieee802154_tree, tvb, loffset, hf_ieee802154_nonask_phr, ett_ieee802154_nonask_phy_phr,
|
|
phr_fields, ENC_NA);
|
|
}
|
|
|
|
offset+=4+2*1;
|
|
mac=tvb_new_subset(tvb,offset,-1, phr & IEEE802154_PHY_LENGTH_MASK);
|
|
|
|
/* Call the common dissector. */
|
|
dissect_ieee802154(mac, pinfo, ieee802154_tree);
|
|
} /* dissect_ieee802154_nonask_phy */
|
|
|
|
/*FUNCTION:------------------------------------------------------
|
|
* NAME
|
|
* dissect_ieee802154
|
|
* DESCRIPTION
|
|
* Dissector for IEEE 802.15.4 packet with an FCS containing
|
|
* a 16-bit CRC value.
|
|
*
|
|
* PARAMETERS
|
|
* tvbuff_t *tvb - pointer to buffer containing raw packet.
|
|
* packet_info *pinfo - pointer to packet information fields
|
|
* proto_tree *tree - pointer to data tree wireshark uses to display packet.
|
|
* RETURNS
|
|
* void
|
|
*---------------------------------------------------------------
|
|
*/
|
|
static void
|
|
dissect_ieee802154(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
|
|
{
|
|
/* Call the common dissector. */
|
|
dissect_ieee802154_common(tvb, pinfo, tree, (ieee802154_cc24xx ? DISSECT_IEEE802154_OPTION_CC24xx : 0));
|
|
} /* dissect_ieee802154 */
|
|
|
|
/*FUNCTION:------------------------------------------------------
|
|
* NAME
|
|
* dissect_ieee802154_nofcs
|
|
* DESCRIPTION
|
|
* Dissector for IEEE 802.15.4 packet with no FCS present.
|
|
*
|
|
* PARAMETERS
|
|
* tvbuff_t *tvb - pointer to buffer containing raw packet.
|
|
* packet_info *pinfo - pointer to packet information fields
|
|
* proto_tree *tree - pointer to data tree wireshark uses to display packet.
|
|
* RETURNS
|
|
* void
|
|
*---------------------------------------------------------------
|
|
*/
|
|
static void
|
|
dissect_ieee802154_nofcs(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
|
|
{
|
|
tvbuff_t *new_tvb;
|
|
/* If there is no FCS present in the reported packet, then the length of
|
|
* the true IEEE 802.15.4 packet is actually 2 bytes longer. Re-create
|
|
* the buffer with an extended reported length so that the packet will
|
|
* be handled as though the FCS were truncated.
|
|
*
|
|
* Note, we can't just call tvb_set_reported_length(), because it includes
|
|
* checks to ensure that the new reported length is not longer than the old
|
|
* reported length (why?), and will throw an exception.
|
|
*/
|
|
new_tvb = tvb_new_subset(tvb, 0, -1, tvb_reported_length(tvb)+IEEE802154_FCS_LEN);
|
|
/* Call the common dissector. */
|
|
dissect_ieee802154_common(new_tvb, pinfo, tree, 0);
|
|
} /* dissect_ieee802154_nofcs */
|
|
|
|
/*FUNCTION:------------------------------------------------------
|
|
* NAME
|
|
* dissect_ieee802154_cc24xx
|
|
* DESCRIPTION
|
|
* Dissector for IEEE 802.15.4 packet with a ChipCon/Texas
|
|
* Instruments compatible FCS. This is typically called by
|
|
* layers encapsulating an IEEE 802.15.4 packet.
|
|
*
|
|
* PARAMETERS
|
|
* tvbuff_t *tvb - pointer to buffer containing raw packet.
|
|
* packet_info *pinfo - pointer to packet information fields
|
|
* proto_tree *tree - pointer to data tree wireshark uses to display packet.
|
|
* RETURNS
|
|
* void
|
|
*---------------------------------------------------------------
|
|
*/
|
|
static void
|
|
dissect_ieee802154_cc24xx(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
|
|
{
|
|
/* Call the common dissector. */
|
|
dissect_ieee802154_common(tvb, pinfo, tree, DISSECT_IEEE802154_OPTION_CC24xx);
|
|
} /* dissect_ieee802154_cc24xx */
|
|
|
|
/*FUNCTION:------------------------------------------------------
|
|
* NAME
|
|
* dissect_ieee802154_common
|
|
* DESCRIPTION
|
|
* IEEE 802.15.4 packet dissection routine for Wireshark.
|
|
* This function extracts all the information first before displaying.
|
|
* If payload exists, that portion will be passed into another dissector
|
|
* for further processing.
|
|
*
|
|
* This is called after the individual dissect_ieee802154* functions
|
|
* have been called to determine what sort of FCS is present.
|
|
* The dissect_ieee802154* functions will set the parameters
|
|
* in the ieee802154_packet structure, and pass it to this one
|
|
* through the data parameter.
|
|
*
|
|
* PARAMETERS
|
|
* tvbuff_t *tvb - pointer to buffer containing raw packet.
|
|
* packet_info *pinfo - pointer to packet information fields
|
|
* proto_tree *tree - pointer to data tree wireshark uses to display packet.
|
|
* guint options - bitwise or of dissector options (see DISSECT_IEEE802154_OPTION_xxx).
|
|
* RETURNS
|
|
* void
|
|
*---------------------------------------------------------------
|
|
*/
|
|
static void
|
|
dissect_ieee802154_common(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, guint options)
|
|
{
|
|
tvbuff_t *volatile payload_tvb;
|
|
proto_tree *volatile ieee802154_tree = NULL;
|
|
proto_item *volatile proto_root = NULL;
|
|
proto_item *hidden_item;
|
|
proto_item *ti;
|
|
|
|
guint offset = 0;
|
|
volatile gboolean fcs_ok = TRUE;
|
|
const char *saved_proto;
|
|
ws_decrypt_status status;
|
|
|
|
ieee802154_packet *packet = wmem_new0(wmem_packet_scope(), ieee802154_packet);
|
|
ieee802154_short_addr addr16;
|
|
ieee802154_hints_t *ieee_hints;
|
|
|
|
heur_dtbl_entry_t *hdtbl_entry;
|
|
|
|
packet->short_table = ieee802154_map.short_table;
|
|
|
|
/* Allocate frame data with hints for upper layers */
|
|
if(!pinfo->fd->flags.visited){
|
|
ieee_hints = wmem_new0(wmem_file_scope(), ieee802154_hints_t);
|
|
p_add_proto_data(wmem_file_scope(), pinfo, proto_ieee802154, 0, ieee_hints);
|
|
} else {
|
|
ieee_hints = (ieee802154_hints_t *)p_get_proto_data(wmem_file_scope(), pinfo, proto_ieee802154, 0);
|
|
}
|
|
|
|
/* Create the protocol tree. */
|
|
if (tree) {
|
|
proto_root = proto_tree_add_protocol_format(tree, proto_ieee802154, tvb, 0, tvb_length(tvb), "IEEE 802.15.4");
|
|
ieee802154_tree = proto_item_add_subtree(proto_root, ett_ieee802154);
|
|
}
|
|
/* Add the protocol name. */
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "IEEE 802.15.4");
|
|
/* Add the packet length. */
|
|
col_add_fstr(pinfo->cinfo, COL_PACKET_LENGTH, "%i", tvb_length(tvb));
|
|
|
|
/* Add the packet length to the filter field */
|
|
hidden_item = proto_tree_add_uint(ieee802154_tree, hf_ieee802154_frame_length, NULL, 0, 0, tvb_reported_length(tvb));
|
|
PROTO_ITEM_SET_HIDDEN(hidden_item);
|
|
|
|
/*=====================================================
|
|
* FRAME CONTROL FIELD
|
|
*=====================================================
|
|
*/
|
|
dissect_ieee802154_fcf(tvb, pinfo, ieee802154_tree, packet, &offset);
|
|
|
|
/*=====================================================
|
|
* SEQUENCE NUMBER
|
|
*=====================================================
|
|
*/
|
|
packet->seqno = tvb_get_guint8(tvb, offset);
|
|
if (tree) {
|
|
proto_tree_add_uint(ieee802154_tree, hf_ieee802154_seqno, tvb, offset, 1, packet->seqno);
|
|
/* For Ack packets display this in the root. */
|
|
if (packet->frame_type == IEEE802154_FCF_ACK) {
|
|
proto_item_append_text(proto_root, ", Sequence Number: %u", packet->seqno);
|
|
}
|
|
}
|
|
offset += 1;
|
|
|
|
/*=====================================================
|
|
* ADDRESSING FIELDS
|
|
*=====================================================
|
|
*/
|
|
/* Clear out the addressing strings. */
|
|
SET_ADDRESS(&pinfo->net_dst, AT_NONE, 0, NULL);
|
|
COPY_ADDRESS_SHALLOW(&pinfo->dl_dst, &pinfo->net_dst);
|
|
COPY_ADDRESS_SHALLOW(&pinfo->dst, &pinfo->net_dst);
|
|
SET_ADDRESS(&pinfo->net_src, AT_NONE, 0, NULL);
|
|
COPY_ADDRESS_SHALLOW(&pinfo->dl_src, &pinfo->net_src);
|
|
COPY_ADDRESS_SHALLOW(&pinfo->src, &pinfo->net_src);
|
|
|
|
/* Get and display the destination PAN, if present. */
|
|
if ( (packet->dst_addr_mode == IEEE802154_FCF_ADDR_SHORT) ||
|
|
(packet->dst_addr_mode == IEEE802154_FCF_ADDR_EXT) ) {
|
|
packet->dst_pan = tvb_get_letohs(tvb, offset);
|
|
if (tree) {
|
|
proto_tree_add_uint(ieee802154_tree, hf_ieee802154_dst_panID, tvb, offset, 2, packet->dst_pan);
|
|
}
|
|
offset += 2;
|
|
}
|
|
|
|
/* Get destination address. */
|
|
if (packet->dst_addr_mode == IEEE802154_FCF_ADDR_SHORT) {
|
|
char dst_addr[32];
|
|
|
|
/* Get the address. */
|
|
packet->dst16 = tvb_get_letohs(tvb, offset);
|
|
|
|
/* Display the destination address. */
|
|
if ( packet->dst16 == IEEE802154_BCAST_ADDR ) {
|
|
g_snprintf(dst_addr, 32, "Broadcast");
|
|
}
|
|
else {
|
|
g_snprintf(dst_addr, 32, "0x%04x", packet->dst16);
|
|
}
|
|
/* Provide address hints to higher layers that need it. */
|
|
if (ieee_hints) {
|
|
ieee_hints->dst16 = packet->dst16;
|
|
}
|
|
|
|
TVB_SET_ADDRESS(&pinfo->dl_dst, ieee802_15_4_short_address_type, tvb, offset, 2);
|
|
COPY_ADDRESS_SHALLOW(&pinfo->dst, &pinfo->dl_dst);
|
|
|
|
if (tree) {
|
|
proto_tree_add_uint(ieee802154_tree, hf_ieee802154_dst16, tvb, offset, 2, packet->dst16);
|
|
proto_item_append_text(proto_root, ", Dst: %s", dst_addr);
|
|
}
|
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, ", Dst: %s", dst_addr);
|
|
offset += 2;
|
|
}
|
|
else if (packet->dst_addr_mode == IEEE802154_FCF_ADDR_EXT) {
|
|
guint64 *p_addr = (guint64 *)wmem_new(pinfo->pool, guint64);
|
|
|
|
/* Get the address */
|
|
packet->dst64 = tvb_get_letoh64(tvb, offset);
|
|
|
|
/* Copy and convert the address to network byte order. */
|
|
*p_addr = pntoh64(&(packet->dst64));
|
|
|
|
/* Display the destination address. */
|
|
/* XXX - OUI resolution doesn't happen when displaying resolved
|
|
* EUI64 addresses; that should probably be fixed in
|
|
* epan/addr_resolv.c.
|
|
*/
|
|
SET_ADDRESS(&pinfo->dl_dst, AT_EUI64, 8, p_addr);
|
|
COPY_ADDRESS_SHALLOW(&pinfo->dst, &pinfo->dl_dst);
|
|
if (tree) {
|
|
proto_tree_add_item(ieee802154_tree, hf_ieee802154_dst64, tvb, offset, 8, ENC_LITTLE_ENDIAN);
|
|
proto_item_append_text(proto_root, ", Dst: %s", eui64_to_display(wmem_packet_scope(), packet->dst64));
|
|
}
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, ", Dst: %s", eui64_to_display(wmem_packet_scope(), packet->dst64));
|
|
offset += 8;
|
|
}
|
|
else if (packet->dst_addr_mode != IEEE802154_FCF_ADDR_NONE) {
|
|
/* Invalid Destination Address Mode. Abort Dissection. */
|
|
expert_add_info(pinfo, proto_root, &ei_ieee802154_dst);
|
|
return;
|
|
}
|
|
|
|
/* Get the source PAN if it exists. The source address will be present if:
|
|
* - The Source addressing exists and
|
|
* - The Destination addressing doesn't exist, or the Intra-PAN bit is unset.
|
|
*/
|
|
if ( ((packet->src_addr_mode == IEEE802154_FCF_ADDR_SHORT) || (packet->src_addr_mode == IEEE802154_FCF_ADDR_EXT)) &&
|
|
((packet->dst_addr_mode == IEEE802154_FCF_ADDR_NONE) || (!packet->intra_pan)) ) {
|
|
/* Source PAN is present, extract it and add it to the tree. */
|
|
packet->src_pan = tvb_get_letohs(tvb, offset);
|
|
if (tree) {
|
|
proto_tree_add_uint(ieee802154_tree, hf_ieee802154_src_panID, tvb, offset, 2, packet->src_pan);
|
|
}
|
|
offset += 2;
|
|
}
|
|
/* Set the panID field in case the intra-pan condition was met. */
|
|
else if (packet->dst_addr_mode != IEEE802154_FCF_ADDR_NONE) {
|
|
packet->src_pan = packet->dst_pan;
|
|
}
|
|
/* If all else fails, consider it a broadcast PANID. */
|
|
else {
|
|
packet->src_pan = IEEE802154_BCAST_PAN;
|
|
}
|
|
|
|
if (ieee_hints) {
|
|
ieee_hints->src_pan = packet->src_pan;
|
|
}
|
|
|
|
/* Get short source address if present. */
|
|
if (packet->src_addr_mode == IEEE802154_FCF_ADDR_SHORT) {
|
|
char src_addr[32];
|
|
|
|
/* Get the address. */
|
|
packet->src16 = tvb_get_letohs(tvb, offset);
|
|
|
|
/* Update the Address fields. */
|
|
if (packet->src16==IEEE802154_BCAST_ADDR) {
|
|
g_snprintf(src_addr, 32, "Broadcast");
|
|
}
|
|
else {
|
|
g_snprintf(src_addr, 32, "0x%04x", packet->src16);
|
|
|
|
if (!pinfo->fd->flags.visited) {
|
|
/* If we know our extended source address from previous packets,
|
|
* provide a pointer to it in a hint for upper layers */
|
|
addr16.addr = packet->src16;
|
|
addr16.pan = packet->src_pan;
|
|
|
|
if (ieee_hints) {
|
|
ieee_hints->src16 = packet->src16;
|
|
ieee_hints->map_rec = (ieee802154_map_rec *)
|
|
g_hash_table_lookup(ieee802154_map.short_table, &addr16);
|
|
}
|
|
}
|
|
}
|
|
|
|
TVB_SET_ADDRESS(&pinfo->dl_src, ieee802_15_4_short_address_type, tvb, offset, 2);
|
|
COPY_ADDRESS_SHALLOW(&pinfo->src, &pinfo->dl_src);
|
|
|
|
/* Add the addressing info to the tree. */
|
|
if (tree) {
|
|
proto_tree_add_uint(ieee802154_tree, hf_ieee802154_src16, tvb, offset, 2, packet->src16);
|
|
proto_item_append_text(proto_root, ", Src: %s", src_addr);
|
|
|
|
if (ieee_hints && ieee_hints->map_rec) {
|
|
/* Display inferred source address info */
|
|
ti = proto_tree_add_eui64(ieee802154_tree, hf_ieee802154_src64, tvb, offset, 0,
|
|
ieee_hints->map_rec->addr64);
|
|
PROTO_ITEM_SET_GENERATED(ti);
|
|
|
|
if ( ieee_hints->map_rec->start_fnum ) {
|
|
ti = proto_tree_add_uint(ieee802154_tree, hf_ieee802154_src64_origin, tvb, 0, 0,
|
|
ieee_hints->map_rec->start_fnum);
|
|
}
|
|
else {
|
|
ti = proto_tree_add_uint_format_value(ieee802154_tree, hf_ieee802154_src64_origin, tvb, 0, 0,
|
|
ieee_hints->map_rec->start_fnum, "Pre-configured");
|
|
}
|
|
PROTO_ITEM_SET_GENERATED(ti);
|
|
}
|
|
}
|
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, ", Src: %s", src_addr);
|
|
|
|
offset += 2;
|
|
}
|
|
else if (packet->src_addr_mode == IEEE802154_FCF_ADDR_EXT) {
|
|
guint64 *p_addr = (guint64 *)wmem_new(pinfo->pool, guint64);
|
|
|
|
/* Get the address. */
|
|
packet->src64 = tvb_get_letoh64(tvb, offset);
|
|
|
|
/* Copy and convert the address to network byte order. */
|
|
*p_addr = pntoh64(&(packet->src64));
|
|
|
|
/* Display the source address. */
|
|
/* XXX - OUI resolution doesn't happen when displaying resolved
|
|
* EUI64 addresses; that should probably be fixed in
|
|
* epan/addr_resolv.c.
|
|
*/
|
|
SET_ADDRESS(&pinfo->dl_src, AT_EUI64, 8, p_addr);
|
|
COPY_ADDRESS_SHALLOW(&pinfo->src, &pinfo->dl_src);
|
|
if (tree) {
|
|
proto_tree_add_item(ieee802154_tree, hf_ieee802154_src64, tvb, offset, 8, ENC_LITTLE_ENDIAN);
|
|
proto_item_append_text(proto_root, ", Src: %s", eui64_to_display(wmem_packet_scope(), packet->src64));
|
|
}
|
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, ", Src: %s", eui64_to_display(wmem_packet_scope(), packet->src64));
|
|
offset += 8;
|
|
}
|
|
else if (packet->src_addr_mode != IEEE802154_FCF_ADDR_NONE) {
|
|
/* Invalid Destination Address Mode. Abort Dissection. */
|
|
expert_add_info(pinfo, proto_root, &ei_ieee802154_src);
|
|
return;
|
|
}
|
|
|
|
/*=====================================================
|
|
* VERIFY FRAME CHECK SEQUENCE
|
|
*=====================================================
|
|
*/
|
|
/* Check, but don't display the FCS yet, otherwise the payload dissection
|
|
* may be out of place in the tree. But we want to know if the FCS is OK in
|
|
* case the CRC is bad (don't want to continue dissection to the NWK layer).
|
|
*/
|
|
if (tvb_bytes_exist(tvb, tvb_reported_length(tvb)-IEEE802154_FCS_LEN, IEEE802154_FCS_LEN)) {
|
|
/* The FCS is in the last two bytes of the packet. */
|
|
guint16 fcs = tvb_get_letohs(tvb, tvb_reported_length(tvb)-IEEE802154_FCS_LEN);
|
|
/* Check if we are expecting a CC2420-style FCS*/
|
|
if (options & DISSECT_IEEE802154_OPTION_CC24xx) {
|
|
fcs_ok = (fcs & IEEE802154_CC24xx_CRC_OK);
|
|
}
|
|
else {
|
|
guint16 fcs_calc = ieee802154_crc_tvb(tvb, tvb_reported_length(tvb)-IEEE802154_FCS_LEN);
|
|
fcs_ok = (fcs == fcs_calc);
|
|
}
|
|
}
|
|
|
|
/*=====================================================
|
|
* AUXILIARY SECURITY HEADER
|
|
*=====================================================
|
|
*/
|
|
/* The Auxiliary Security Header only exists in IEEE 802.15.4-2006 */
|
|
if (packet->security_enable && (packet->version == IEEE802154_VERSION_2006)) {
|
|
proto_tree *header_tree, *field_tree;
|
|
guint8 security_control;
|
|
guint aux_length = 5; /* Minimum length of the auxiliary header. */
|
|
static const int * security_fields[] = {
|
|
&hf_ieee802154_security_level,
|
|
&hf_ieee802154_key_id_mode,
|
|
&hf_ieee802154_aux_sec_reserved,
|
|
NULL
|
|
};
|
|
|
|
/* Parse the security control field. */
|
|
security_control = tvb_get_guint8(tvb, offset);
|
|
packet->security_level = (ieee802154_security_level)(security_control & IEEE802154_AUX_SEC_LEVEL_MASK);
|
|
packet->key_id_mode = (ieee802154_key_id_mode)((security_control & IEEE802154_AUX_KEY_ID_MODE_MASK) >> IEEE802154_AUX_KEY_ID_MODE_SHIFT);
|
|
|
|
/* Compute the length of the auxiliary header and create a subtree. */
|
|
if (packet->key_id_mode != KEY_ID_MODE_IMPLICIT) aux_length++;
|
|
if (packet->key_id_mode == KEY_ID_MODE_KEY_EXPLICIT_4) aux_length += 4;
|
|
if (packet->key_id_mode == KEY_ID_MODE_KEY_EXPLICIT_8) aux_length += 8;
|
|
header_tree = proto_tree_add_subtree(ieee802154_tree, tvb, offset, aux_length,
|
|
ett_ieee802154_auxiliary_security, NULL, "Auxiliary Security Header");
|
|
|
|
/* Security Control Field */
|
|
proto_tree_add_bitmask(header_tree, tvb, offset, hf_ieee802154_security_control_field, ett_ieee802154_aux_sec_control, security_fields, ENC_NA);
|
|
offset++;
|
|
|
|
/* Frame Counter Field */
|
|
packet->frame_counter = tvb_get_letohl (tvb, offset);
|
|
proto_tree_add_uint(header_tree, hf_ieee802154_aux_sec_frame_counter, tvb, offset,4, packet->frame_counter);
|
|
offset +=4;
|
|
|
|
/* Key identifier field(s). */
|
|
if (packet->key_id_mode != KEY_ID_MODE_IMPLICIT) {
|
|
/* Create a subtree. */
|
|
field_tree = proto_tree_add_subtree(header_tree, tvb, offset, 1,
|
|
ett_ieee802154_aux_sec_key_id, &ti, "Key Identifier Field"); /* Will fix length later. */
|
|
/* Add key source, if it exists. */
|
|
if (packet->key_id_mode == KEY_ID_MODE_KEY_EXPLICIT_4) {
|
|
packet->key_source.addr32 = tvb_get_ntohl(tvb, offset);
|
|
proto_tree_add_uint64(field_tree, hf_ieee802154_aux_sec_key_source, tvb, offset, 4, packet->key_source.addr32);
|
|
proto_item_set_len(ti, 1 + 4);
|
|
offset += (int)sizeof (guint32);
|
|
}
|
|
if (packet->key_id_mode == KEY_ID_MODE_KEY_EXPLICIT_8) {
|
|
packet->key_source.addr64 = tvb_get_ntoh64(tvb, offset);
|
|
proto_tree_add_uint64(field_tree, hf_ieee802154_aux_sec_key_source, tvb, offset, 8, packet->key_source.addr64);
|
|
proto_item_set_len(ti, 1 + 8);
|
|
offset += 8;
|
|
}
|
|
/* Add key identifier. */
|
|
packet->key_index = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_uint(field_tree, hf_ieee802154_aux_sec_key_index, tvb, offset,1, packet->key_index);
|
|
offset++;
|
|
}
|
|
}
|
|
|
|
/*=====================================================
|
|
* NONPAYLOAD FIELDS
|
|
*=====================================================
|
|
*/
|
|
/* All of the beacon fields, except the beacon payload are considered nonpayload. */
|
|
if (packet->frame_type == IEEE802154_FCF_BEACON) {
|
|
/* Parse the superframe spec. */
|
|
dissect_ieee802154_superframe(tvb, pinfo, ieee802154_tree, &offset);
|
|
/* Parse the GTS information fields. */
|
|
dissect_ieee802154_gtsinfo(tvb, pinfo, ieee802154_tree, &offset);
|
|
/* Parse the Pending address list. */
|
|
dissect_ieee802154_pendaddr(tvb, pinfo, ieee802154_tree, &offset);
|
|
}
|
|
/* Only the Command ID is considered nonpayload. */
|
|
if (packet->frame_type == IEEE802154_FCF_CMD) {
|
|
packet->command_id = tvb_get_guint8(tvb, offset);
|
|
if (tree) {
|
|
proto_tree_add_uint(ieee802154_tree, hf_ieee802154_cmd_id, tvb, offset, 1, packet->command_id);
|
|
}
|
|
offset++;
|
|
|
|
/* Display the command identifier in the info column. */
|
|
col_set_str(pinfo->cinfo, COL_INFO, val_to_str_const(packet->command_id, ieee802154_cmd_names, "Unknown Command"));
|
|
}
|
|
/* No other frame types have nonpayload fields. */
|
|
|
|
/*=====================================================
|
|
* PAYLOAD DISSECTION
|
|
*=====================================================
|
|
*/
|
|
/* IEEE 802.15.4-2003 may have security information pre-pended to payload */
|
|
if (packet->security_enable && (packet->version == IEEE802154_VERSION_2003)) {
|
|
/* Store security suite preference in the 2006 security level identifier to simplify 2003 integration! */
|
|
packet->security_level = (ieee802154_security_level)ieee802154_sec_suite;
|
|
|
|
/* Frame Counter and Key Sequence Counter prepended to the payload of an encrypted frame */
|
|
if (IEEE802154_IS_ENCRYPTED(packet->security_level)) {
|
|
packet->frame_counter = tvb_get_letohl (tvb, offset);
|
|
proto_tree_add_uint(ieee802154_tree, hf_ieee802154_sec_frame_counter, tvb, offset, (int)sizeof(guint32), packet->frame_counter);
|
|
offset += (int)sizeof(guint32);
|
|
|
|
packet->key_sequence_counter = tvb_get_guint8 (tvb, offset);
|
|
proto_tree_add_uint(ieee802154_tree, hf_ieee802154_sec_key_sequence_counter, tvb, offset, (int)sizeof(guint8), packet->key_sequence_counter);
|
|
offset += (int)sizeof(guint8);
|
|
}
|
|
}
|
|
|
|
/* Encrypted Payload. */
|
|
if (packet->security_enable) {
|
|
payload_tvb = dissect_ieee802154_decrypt(tvb, offset, pinfo, packet, &status);
|
|
|
|
/* Get the unencrypted data if decryption failed. */
|
|
if (!payload_tvb) {
|
|
/* Deal with possible truncation and the FCS field at the end. */
|
|
gint reported_len = tvb_reported_length(tvb)-offset-IEEE802154_FCS_LEN;
|
|
gint captured_len = tvb_length(tvb)-offset;
|
|
if (reported_len < captured_len) captured_len = reported_len;
|
|
payload_tvb = tvb_new_subset(tvb, offset, captured_len, reported_len);
|
|
}
|
|
|
|
/* Display the reason for failure, and abort if the error was fatal. */
|
|
switch (status) {
|
|
case DECRYPT_PACKET_SUCCEEDED:
|
|
case DECRYPT_NOT_ENCRYPTED:
|
|
/* No problem. */
|
|
break;
|
|
|
|
case DECRYPT_VERSION_UNSUPPORTED:
|
|
/* We don't support decryption with that version of the protocol */
|
|
expert_add_info_format(pinfo, proto_root, &ei_ieee802154_decrypt_error, "We don't support decryption with protocol version %u", packet->version);
|
|
call_dissector(data_handle, payload_tvb, pinfo, tree);
|
|
goto dissect_ieee802154_fcs;
|
|
|
|
case DECRYPT_PACKET_TOO_SMALL:
|
|
expert_add_info_format(pinfo, proto_root, &ei_ieee802154_decrypt_error, "Packet was too small to include the CRC and MIC");
|
|
call_dissector(data_handle, payload_tvb, pinfo, tree);
|
|
goto dissect_ieee802154_fcs;
|
|
|
|
case DECRYPT_PACKET_NO_EXT_SRC_ADDR:
|
|
expert_add_info_format(pinfo, proto_root, &ei_ieee802154_decrypt_error, "No extended source address - can't decrypt");
|
|
call_dissector(data_handle, payload_tvb, pinfo, tree);
|
|
goto dissect_ieee802154_fcs;
|
|
|
|
case DECRYPT_PACKET_NO_KEY:
|
|
expert_add_info_format(pinfo, proto_root, &ei_ieee802154_decrypt_error, "No encryption key set - can't decrypt");
|
|
call_dissector(data_handle, payload_tvb, pinfo, tree);
|
|
goto dissect_ieee802154_fcs;
|
|
|
|
case DECRYPT_PACKET_DECRYPT_FAILED:
|
|
expert_add_info_format(pinfo, proto_root, &ei_ieee802154_decrypt_error, "Decrypt failed");
|
|
call_dissector(data_handle, payload_tvb, pinfo, tree);
|
|
goto dissect_ieee802154_fcs;
|
|
|
|
case DECRYPT_PACKET_MIC_CHECK_FAILED:
|
|
expert_add_info_format(pinfo, proto_root, &ei_ieee802154_decrypt_error, "MIC check failed");
|
|
/*
|
|
* Abort only if the payload was encrypted, in which case we
|
|
* probably didn't decrypt the packet right (eg: wrong key).
|
|
*/
|
|
if (IEEE802154_IS_ENCRYPTED(packet->security_level)) {
|
|
call_dissector(data_handle, payload_tvb, pinfo, tree);
|
|
goto dissect_ieee802154_fcs;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
/* Plaintext Payload. */
|
|
else {
|
|
/* Deal with possible truncation and the FCS field at the end. */
|
|
gint reported_len = tvb_reported_length(tvb)-offset-IEEE802154_FCS_LEN;
|
|
gint captured_len = tvb_length(tvb)-offset;
|
|
if (reported_len < captured_len) captured_len = reported_len;
|
|
payload_tvb = tvb_new_subset(tvb, offset, captured_len, reported_len);
|
|
}
|
|
|
|
/*
|
|
* Wrap the sub-dissection in a try/catch block in case the payload is
|
|
* broken. First we store the current protocol so we can fix it if an
|
|
* exception is thrown by the subdissectors.
|
|
*/
|
|
saved_proto = pinfo->current_proto;
|
|
/* Try to dissect the payload. */
|
|
TRY {
|
|
switch (packet->frame_type) {
|
|
case IEEE802154_FCF_BEACON:
|
|
if (!dissector_try_heuristic(ieee802154_beacon_subdissector_list, payload_tvb, pinfo, tree, &hdtbl_entry, packet)) {
|
|
/* Could not subdissect, call the data dissector instead. */
|
|
call_dissector(data_handle, payload_tvb, pinfo, tree);
|
|
}
|
|
break;
|
|
case IEEE802154_FCF_CMD:
|
|
dissect_ieee802154_command(payload_tvb, pinfo, ieee802154_tree, packet);
|
|
break;
|
|
case IEEE802154_FCF_DATA:
|
|
/* Sanity-check. */
|
|
if ((!fcs_ok && ieee802154_fcs_ok) || !tvb_reported_length(payload_tvb)) {
|
|
call_dissector(data_handle, payload_tvb, pinfo, tree);
|
|
break;
|
|
}
|
|
/* Try the PANID dissector table for stateful dissection. */
|
|
if (dissector_try_uint_new(panid_dissector_table, packet->src_pan, payload_tvb, pinfo, tree, TRUE, packet)) {
|
|
break;
|
|
}
|
|
/* Try again with the destination PANID (if different) */
|
|
if (((packet->dst_addr_mode == IEEE802154_FCF_ADDR_SHORT) ||
|
|
(packet->dst_addr_mode == IEEE802154_FCF_ADDR_EXT)) &&
|
|
(packet->dst_pan != packet->src_pan) &&
|
|
dissector_try_uint_new(panid_dissector_table, packet->src_pan, payload_tvb, pinfo, tree, TRUE, packet)) {
|
|
break;
|
|
}
|
|
/* Try heuristic dissection. */
|
|
if (dissector_try_heuristic(ieee802154_heur_subdissector_list, payload_tvb, pinfo, tree, &hdtbl_entry, packet)) break;
|
|
/* Fall-through to dump undissectable payloads. */
|
|
default:
|
|
/* Could not subdissect, call the data dissector instead. */
|
|
call_dissector(data_handle, payload_tvb, pinfo, tree);
|
|
} /* switch */
|
|
}
|
|
CATCH_ALL {
|
|
/*
|
|
* Someone encountered an error while dissecting the payload. But
|
|
* we haven't yet finished processing all of our layer. Catch and
|
|
* display the exception, then fall-through to finish displaying
|
|
* the FCS (which we display last so the frame is ordered correctly
|
|
* in the tree).
|
|
*/
|
|
show_exception(payload_tvb, pinfo, tree, EXCEPT_CODE, GET_MESSAGE);
|
|
pinfo->current_proto = saved_proto;
|
|
}
|
|
ENDTRY;
|
|
|
|
/*=====================================================
|
|
* FRAME CHECK SEQUENCE
|
|
*=====================================================
|
|
*/
|
|
dissect_ieee802154_fcs:
|
|
/* The FCS should be the last bytes of the reported packet. */
|
|
offset = tvb_reported_length(tvb)-IEEE802154_FCS_LEN;
|
|
/* Dissect the FCS only if it exists (captures which don't or can't get the
|
|
* FCS will simply truncate the packet to omit it, but should still set the
|
|
* reported length to cover the original packet length), so if the snapshot
|
|
* is too short for an FCS don't make a fuss.
|
|
*/
|
|
if (tvb_bytes_exist(tvb, offset, IEEE802154_FCS_LEN) && (tree)) {
|
|
proto_tree *field_tree;
|
|
guint16 fcs = tvb_get_letohs(tvb, offset);
|
|
|
|
/* Display the FCS depending on expected FCS format */
|
|
if ((options & DISSECT_IEEE802154_OPTION_CC24xx)) {
|
|
/* Create a subtree for the FCS. */
|
|
field_tree = proto_tree_add_subtree_format(ieee802154_tree, tvb, offset, 2, ett_ieee802154_fcs, NULL,
|
|
"Frame Check Sequence (TI CC24xx format): FCS %s", (fcs_ok) ? "OK" : "Bad");
|
|
/* Display FCS contents. */
|
|
ti = proto_tree_add_int(field_tree, hf_ieee802154_rssi, tvb, offset++, 1, (gint8) (fcs & IEEE802154_CC24xx_RSSI));
|
|
proto_item_append_text(ti, " dB"); /* Displaying Units */
|
|
proto_tree_add_boolean(field_tree, hf_ieee802154_fcs_ok, tvb, offset, 1, (gboolean) (fcs & IEEE802154_CC24xx_CRC_OK));
|
|
proto_tree_add_uint(field_tree, hf_ieee802154_correlation, tvb, offset, 1, (guint8) ((fcs & IEEE802154_CC24xx_CORRELATION) >> 8));
|
|
}
|
|
else {
|
|
ti = proto_tree_add_uint(ieee802154_tree, hf_ieee802154_fcs, tvb, offset, 2, fcs);
|
|
if (fcs_ok) {
|
|
proto_item_append_text(ti, " (Correct)");
|
|
}
|
|
else {
|
|
proto_item_append_text(ti, " (Incorrect, expected FCS=0x%04x", ieee802154_crc_tvb(tvb, offset));
|
|
}
|
|
/* To Help with filtering, add the fcs_ok field to the tree. */
|
|
ti = proto_tree_add_boolean(ieee802154_tree, hf_ieee802154_fcs_ok, tvb, offset, 2, fcs_ok);
|
|
PROTO_ITEM_SET_HIDDEN(ti);
|
|
}
|
|
}
|
|
else if (tree) {
|
|
/* Even if the FCS isn't present, add the fcs_ok field to the tree to
|
|
* help with filter. Be sure not to make it visible though.
|
|
*/
|
|
ti = proto_tree_add_boolean_format_value(ieee802154_tree, hf_ieee802154_fcs_ok, tvb, offset, 2, fcs_ok, "Unknown");
|
|
PROTO_ITEM_SET_HIDDEN(ti);
|
|
}
|
|
|
|
/* If the CRC is invalid, make a note of it in the info column. */
|
|
if (!fcs_ok) {
|
|
col_append_str(pinfo->cinfo, COL_INFO, ", Bad FCS");
|
|
if (tree) proto_item_append_text(proto_root, ", Bad FCS");
|
|
|
|
/* Flag packet as having a bad crc. */
|
|
expert_add_info(pinfo, proto_root, &ei_ieee802154_fcs);
|
|
}
|
|
} /* dissect_ieee802154_common */
|
|
|
|
/*FUNCTION:------------------------------------------------------
|
|
* NAME
|
|
* dissect_ieee802154_superframe
|
|
* DESCRIPTION
|
|
* Subdissector command for the Superframe specification
|
|
* sub-field within the beacon frame.
|
|
* PARAMETERS
|
|
* tvbuff_t *tvb - pointer to buffer containing raw packet.
|
|
* packet_info *pinfo - pointer to packet information fields (unused).
|
|
* proto_tree *tree - pointer to command subtree.
|
|
* ieee802154_packet *packet - IEEE 802.15.4 packet information (unused).
|
|
* guint *offset - offset into the tvbuff to begin dissection.
|
|
* RETURNS
|
|
* void
|
|
*---------------------------------------------------------------
|
|
*/
|
|
static void
|
|
dissect_ieee802154_superframe(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, guint *offset)
|
|
{
|
|
static const int * superframe[] = {
|
|
&hf_ieee802154_beacon_order,
|
|
&hf_ieee802154_superframe_order,
|
|
&hf_ieee802154_cap,
|
|
&hf_ieee802154_superframe_battery_ext,
|
|
&hf_ieee802154_superframe_coord,
|
|
&hf_ieee802154_assoc_permit,
|
|
NULL
|
|
};
|
|
|
|
proto_tree_add_bitmask_text(tree, tvb, *offset, 2, "Superframe Specification", NULL , ett_ieee802154_superframe, superframe, ENC_LITTLE_ENDIAN, BMT_NO_INT|BMT_NO_TFS);
|
|
(*offset) += 2;
|
|
} /* dissect_ieee802154_superframe */
|
|
|
|
/*FUNCTION:------------------------------------------------------
|
|
* NAME
|
|
* dissect_ieee802154_gtsinfo
|
|
* DESCRIPTION
|
|
* Subdissector command for the GTS information fields within
|
|
* the beacon frame.
|
|
* PARAMETERS
|
|
* tvbuff_t *tvb - pointer to buffer containing raw packet.
|
|
* packet_info *pinfo - pointer to packet information fields (unused).
|
|
* proto_tree *tree - pointer to command subtree.
|
|
* ieee802154_packet *packet - IEEE 802.15.4 packet information (unused).
|
|
* guint *offset - offset into the tvbuff to begin dissection.
|
|
* RETURNS
|
|
* void
|
|
*---------------------------------------------------------------
|
|
*/
|
|
static void
|
|
dissect_ieee802154_gtsinfo(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, guint *offset)
|
|
{
|
|
proto_tree *field_tree = NULL;
|
|
proto_tree *subtree = NULL;
|
|
proto_item *ti;
|
|
guint8 gts_spec;
|
|
guint8 gts_count;
|
|
|
|
/* Get and display the GTS specification field */
|
|
gts_spec = tvb_get_guint8(tvb, *offset);
|
|
gts_count = gts_spec & IEEE802154_GTS_COUNT_MASK;
|
|
if (tree) {
|
|
/* Add Subtree for GTS information. */
|
|
if (gts_count) {
|
|
field_tree = proto_tree_add_subtree(tree, tvb, *offset, 2 + (gts_count * 3), ett_ieee802154_gts, NULL, "GTS");
|
|
}
|
|
else {
|
|
field_tree = proto_tree_add_subtree(tree, tvb, *offset, 1, ett_ieee802154_gts, NULL, "GTS");
|
|
}
|
|
|
|
proto_tree_add_uint(field_tree, hf_ieee802154_gts_count, tvb, *offset, 1, gts_count);
|
|
proto_tree_add_boolean(field_tree, hf_ieee802154_gts_permit, tvb, *offset, 1, gts_spec & IEEE802154_GTS_PERMIT_MASK);
|
|
}
|
|
(*offset) += 1;
|
|
|
|
/* If the GTS descriptor count is nonzero, then the GTS directions mask and descriptor list are present. */
|
|
if (gts_count) {
|
|
guint8 gts_directions = tvb_get_guint8(tvb, *offset);
|
|
guint gts_rx = 0;
|
|
int i;
|
|
|
|
/* Display the directions mask. */
|
|
if (tree) {
|
|
proto_tree *dir_tree;
|
|
|
|
/* Create a subtree. */
|
|
dir_tree = proto_tree_add_subtree(field_tree, tvb, *offset, 1, ett_ieee802154_gts_direction, &ti, "GTS Directions");
|
|
|
|
/* Add the directions to the subtree. */
|
|
for (i=0; i<gts_count; i++) {
|
|
gboolean dir = gts_directions & IEEE802154_GTS_DIRECTION_SLOT(i);
|
|
proto_tree_add_boolean_format(dir_tree, hf_ieee802154_gts_direction, tvb, *offset, 1, dir, "GTS Slot %i: %s", i+1, dir?"Receive Only":"Transmit Only");
|
|
if (dir) gts_rx++;
|
|
} /* for */
|
|
proto_item_append_text(ti, ": %i Receive & %i Transmit", gts_rx, gts_count - gts_rx);
|
|
}
|
|
(*offset) += 1;
|
|
|
|
/* Create a subtree for the GTS descriptors. */
|
|
subtree = proto_tree_add_subtree(field_tree, tvb, *offset, gts_count * 3, ett_ieee802154_gts_descriptors, NULL, "GTS Descriptors");
|
|
|
|
/* Get and display the GTS descriptors. */
|
|
for (i=0; i<gts_count; i++) {
|
|
guint16 gts_addr = tvb_get_letohs(tvb, (*offset));
|
|
guint8 gts_slot = tvb_get_guint8(tvb, (*offset)+2);
|
|
guint8 gts_length = (gts_slot & IEEE802154_GTS_LENGTH_MASK) >> IEEE802154_GTS_LENGTH_SHIFT;
|
|
|
|
gts_slot = (gts_slot & IEEE802154_GTS_SLOT_MASK);
|
|
|
|
if (tree) {
|
|
/* Add address, slot, and time length fields. */
|
|
ti = proto_tree_add_uint(subtree, hf_ieee802154_gts_address, tvb, (*offset), 3, gts_addr);
|
|
proto_item_append_text(ti, ", Slot: %i", gts_slot);
|
|
proto_item_append_text(ti, ", Length: %i", gts_length);
|
|
}
|
|
(*offset) += 3;
|
|
} /* for */
|
|
}
|
|
} /* dissect_ieee802154_gtsinfo */
|
|
|
|
/*FUNCTION:------------------------------------------------------
|
|
* NAME
|
|
* dissect_ieee802154_pendaddr
|
|
* DESCRIPTION
|
|
* Subdissector command for the pending address list fields
|
|
* within the beacon frame.
|
|
* PARAMETERS
|
|
* tvbuff_t *tvb - pointer to buffer containing raw packet.
|
|
* packet_info *pinfo - pointer to packet information fields (unused).
|
|
* proto_tree *tree - pointer to command subtree.
|
|
* ieee802154_packet *packet - IEEE 802.15.4 packet information (unused).
|
|
* guint *offset - offset into the tvbuff to begin dissection.
|
|
* RETURNS
|
|
* void
|
|
*---------------------------------------------------------------
|
|
*/
|
|
static void
|
|
dissect_ieee802154_pendaddr(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, guint *offset)
|
|
{
|
|
proto_tree *subtree;
|
|
guint8 pend_spec;
|
|
guint8 pend_num16;
|
|
guint8 pend_num64;
|
|
int i;
|
|
|
|
/* Get the Pending Addresses specification fields */
|
|
pend_spec = tvb_get_guint8(tvb, *offset);
|
|
pend_num16 = pend_spec & IEEE802154_PENDADDR_SHORT_MASK;
|
|
pend_num64 = (pend_spec & IEEE802154_PENDADDR_LONG_MASK) >> IEEE802154_PENDADDR_LONG_SHIFT;
|
|
|
|
/* Add Subtree for the addresses */
|
|
subtree = proto_tree_add_subtree_format(tree, tvb, *offset, 1 + 2*pend_num16 + 8*pend_num64,
|
|
ett_ieee802154_pendaddr, NULL, "Pending Addresses: %i Short and %i Long", pend_num16, pend_num64);
|
|
(*offset) += 1;
|
|
|
|
for (i=0; i<pend_num16; i++) {
|
|
guint16 addr = tvb_get_letohs(tvb, *offset);
|
|
proto_tree_add_uint(subtree, hf_ieee802154_pending16, tvb, *offset, 2, addr);
|
|
(*offset) += 2;
|
|
} /* for */
|
|
for (i=0; i<pend_num64; i++) {
|
|
proto_tree_add_item(subtree, hf_ieee802154_pending64, tvb, *offset, 8, ENC_LITTLE_ENDIAN);
|
|
(*offset) += 8;
|
|
} /* for */
|
|
} /* dissect_ieee802154_pendaddr */
|
|
|
|
/*FUNCTION:------------------------------------------------------
|
|
* NAME
|
|
* dissect_ieee802154_assoc_req
|
|
* DESCRIPTION
|
|
* Command subdissector routine for the Association request
|
|
* command.
|
|
* PARAMETERS
|
|
* tvbuff_t *tvb - pointer to buffer containing raw packet.
|
|
* packet_info *pinfo - pointer to packet information fields.
|
|
* proto_tree *tree - pointer to protocol tree.
|
|
* ieee802154_packet *packet - IEEE 802.15.4 packet information.
|
|
* RETURNS
|
|
* void
|
|
*---------------------------------------------------------------
|
|
*/
|
|
static const true_false_string tfs_cinfo_device_type = { "FFD", "RFD" };
|
|
static const true_false_string tfs_cinfo_power_src = { "AC/Mains Power", "Battery" };
|
|
|
|
static void
|
|
dissect_ieee802154_assoc_req(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, ieee802154_packet *packet)
|
|
{
|
|
proto_tree *subtree;
|
|
static const int * capability[] = {
|
|
&hf_ieee802154_cinfo_alt_coord,
|
|
&hf_ieee802154_cinfo_device_type,
|
|
&hf_ieee802154_cinfo_power_src,
|
|
&hf_ieee802154_cinfo_idle_rx,
|
|
&hf_ieee802154_cinfo_sec_capable,
|
|
&hf_ieee802154_cinfo_alloc_addr,
|
|
NULL
|
|
};
|
|
|
|
/* Create a subtree for this command frame. */
|
|
subtree = proto_tree_add_subtree(tree, tvb, 0, 1, ett_ieee802154_cmd, NULL,
|
|
val_to_str_const(packet->command_id, ieee802154_cmd_names, "Unknown Command"));
|
|
|
|
/* Get and display capability info. */
|
|
proto_tree_add_bitmask_list(subtree, tvb, 0, 1, capability, ENC_NA);
|
|
|
|
/* Call the data dissector for any leftover bytes. */
|
|
if (tvb_reported_length(tvb) > 1) {
|
|
call_dissector(data_handle, tvb_new_subset_remaining(tvb, 1), pinfo, tree);
|
|
}
|
|
} /* dissect_ieee802154_assoc_req */
|
|
|
|
/*FUNCTION:------------------------------------------------------
|
|
* NAME
|
|
* dissect_ieee802154_assoc_rsp
|
|
* DESCRIPTION
|
|
* Command subdissector routine for the Association response
|
|
* command.
|
|
* PARAMETERS
|
|
* tvbuff_t *tvb - pointer to buffer containing raw packet.
|
|
* packet_info *pinfo - pointer to packet information fields.
|
|
* proto_tree *tree - pointer to protocol tree.
|
|
* ieee802154_packet *packet - IEEE 802.15.4 packet information.
|
|
* RETURNS
|
|
* void
|
|
*---------------------------------------------------------------
|
|
*/
|
|
static void
|
|
dissect_ieee802154_assoc_rsp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, ieee802154_packet *packet)
|
|
{
|
|
proto_tree *subtree;
|
|
proto_item *ti;
|
|
guint16 short_addr;
|
|
guint8 status;
|
|
guint offset = 0;
|
|
|
|
/* Create a subtree for this command frame. */
|
|
subtree = proto_tree_add_subtree(tree, tvb, offset, 3, ett_ieee802154_cmd, NULL,
|
|
val_to_str_const(packet->command_id, ieee802154_cmd_names, "Unknown Command"));
|
|
|
|
/* Get and display the short address. */
|
|
short_addr = tvb_get_letohs(tvb, offset);
|
|
proto_tree_add_uint(subtree, hf_ieee802154_assoc_addr, tvb, offset, 2, short_addr);
|
|
offset += 2;
|
|
|
|
/* Get and display the status. */
|
|
status = tvb_get_guint8(tvb, offset);
|
|
if (tree) {
|
|
ti = proto_tree_add_uint(subtree, hf_ieee802154_assoc_status, tvb, offset, 1, status);
|
|
if (status == IEEE802154_CMD_ASRSP_AS_SUCCESS) proto_item_append_text(ti, " (Association Successful)");
|
|
else if (status == IEEE802154_CMD_ASRSP_PAN_FULL) proto_item_append_text(ti, " (PAN Full)");
|
|
else if (status == IEEE802154_CMD_ASRSP_PAN_DENIED) proto_item_append_text(ti, " (Association Denied)");
|
|
else proto_item_append_text(ti, " (Reserved)");
|
|
}
|
|
offset += 1;
|
|
|
|
/* Update the info column. */
|
|
if (status == IEEE802154_CMD_ASRSP_AS_SUCCESS) {
|
|
/* Association was successful. */
|
|
if (packet->src_addr_mode != IEEE802154_FCF_ADDR_SHORT) {
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, ", PAN: 0x%04x", packet->dst_pan);
|
|
}
|
|
if (short_addr != IEEE802154_NO_ADDR16) {
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " Addr: 0x%04x", short_addr);
|
|
}
|
|
}
|
|
else {
|
|
/* Association was unsuccessful. */
|
|
col_append_str(pinfo->cinfo, COL_INFO, ", Unsuccessful");
|
|
}
|
|
|
|
/* Update the address table. */
|
|
if ((status == IEEE802154_CMD_ASRSP_AS_SUCCESS) && (short_addr != IEEE802154_NO_ADDR16)) {
|
|
ieee802154_addr_update(&ieee802154_map, short_addr, packet->dst_pan, packet->dst64,
|
|
pinfo->current_proto, pinfo->fd->num);
|
|
}
|
|
|
|
/* Call the data dissector for any leftover bytes. */
|
|
if (tvb_length(tvb) > offset) {
|
|
call_dissector(data_handle, tvb_new_subset_remaining(tvb, offset), pinfo, tree);
|
|
}
|
|
} /* dissect_ieee802154_assoc_rsp */
|
|
|
|
/*FUNCTION:------------------------------------------------------
|
|
* NAME
|
|
* dissect_ieee802154_disassoc
|
|
* DESCRIPTION
|
|
* Command subdissector routine for the Disassociate command.
|
|
* PARAMETERS
|
|
* tvbuff_t *tvb - pointer to buffer containing raw packet.
|
|
* packet_info *pinfo - pointer to packet information fields.
|
|
* proto_tree *tree - pointer to protocol tree.
|
|
* ieee802154_packet *packet - IEEE 802.15.4 packet information.
|
|
* RETURNS
|
|
* void
|
|
*---------------------------------------------------------------
|
|
*/
|
|
static void
|
|
dissect_ieee802154_disassoc(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, ieee802154_packet *packet)
|
|
{
|
|
proto_tree *subtree;
|
|
proto_item *ti;
|
|
guint8 reason;
|
|
|
|
/* Create a subtree for this command frame. */
|
|
subtree = proto_tree_add_subtree(tree, tvb, 0, 1, ett_ieee802154_cmd, NULL,
|
|
val_to_str_const(packet->command_id, ieee802154_cmd_names, "Unknown Command"));
|
|
|
|
/* Get and display the disassociation reason. */
|
|
reason = tvb_get_guint8(tvb, 0);
|
|
if (tree) {
|
|
ti = proto_tree_add_uint(subtree, hf_ieee802154_disassoc_reason, tvb, 0, 1, reason);
|
|
switch(reason) {
|
|
case 0x01:
|
|
proto_item_append_text(ti, " (Coordinator requests device to leave)");
|
|
break;
|
|
|
|
case 0x02:
|
|
proto_item_append_text(ti, " (Device wishes to leave)");
|
|
break;
|
|
|
|
default:
|
|
proto_item_append_text(ti, " (Reserved)");
|
|
break;
|
|
} /* switch */
|
|
}
|
|
|
|
if (!pinfo->fd->flags.visited) {
|
|
/* Update the address tables */
|
|
if ( packet->dst_addr_mode == IEEE802154_FCF_ADDR_EXT ) {
|
|
ieee802154_long_addr_invalidate(packet->dst64, pinfo->fd->num);
|
|
} else if ( packet->dst_addr_mode == IEEE802154_FCF_ADDR_SHORT ) {
|
|
ieee802154_short_addr_invalidate(packet->dst16, packet->dst_pan, pinfo->fd->num);
|
|
}
|
|
}
|
|
|
|
/* Call the data dissector for any leftover bytes. */
|
|
if (tvb_length(tvb) > 1) {
|
|
call_dissector(data_handle, tvb_new_subset_remaining(tvb, 1), pinfo, tree);
|
|
}
|
|
} /* dissect_ieee802154_disassoc */
|
|
|
|
/*FUNCTION:------------------------------------------------------
|
|
* NAME
|
|
* dissect_ieee802154_realign
|
|
* DESCRIPTION
|
|
* Command subdissector routine for the Coordinator Realignment
|
|
* command.
|
|
* PARAMETERS
|
|
* tvbuff_t *tvb - pointer to buffer containing raw packet.
|
|
* packet_info *pinfo - pointer to packet information fields.
|
|
* proto_tree *tree - pointer to protocol tree.
|
|
* ieee802154_packet *packet - IEEE 802.15.4 packet information.
|
|
* RETURNS
|
|
* void
|
|
*---------------------------------------------------------------
|
|
*/
|
|
static void
|
|
dissect_ieee802154_realign(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, ieee802154_packet *packet)
|
|
{
|
|
proto_tree *subtree;
|
|
proto_item *subitem;
|
|
guint16 pan_id;
|
|
guint16 coord_addr;
|
|
guint8 channel;
|
|
guint16 short_addr;
|
|
guint offset = 0;
|
|
|
|
/* Create a subtree for this command frame. */
|
|
subtree = proto_tree_add_subtree(tree, tvb, offset, 0, ett_ieee802154_cmd, &subitem,
|
|
val_to_str_const(packet->command_id, ieee802154_cmd_names, "Unknown Command"));
|
|
|
|
/* Get and display the command PAN ID. */
|
|
pan_id = tvb_get_letohs(tvb, offset);
|
|
proto_tree_add_uint(subtree, hf_ieee802154_realign_pan, tvb, offset, 2, pan_id);
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, ", PAN: 0x%04x", pan_id);
|
|
offset += 2;
|
|
|
|
/* Get and display the coordinator address. */
|
|
coord_addr = tvb_get_letohs(tvb, offset);
|
|
proto_tree_add_uint(subtree, hf_ieee802154_realign_caddr, tvb, offset, 2, coord_addr);
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, ", Coordinator: 0x%04x", coord_addr);
|
|
offset += 2;
|
|
|
|
/* Get and display the channel. */
|
|
channel = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_uint(subtree, hf_ieee802154_realign_channel, tvb, offset, 1, channel);
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, ", Channel: %u", channel);
|
|
offset += 1;
|
|
|
|
/* Get and display the short address. */
|
|
short_addr = tvb_get_letohs(tvb, offset);
|
|
if (tree) proto_tree_add_uint(subtree, hf_ieee802154_realign_addr, tvb, offset, 2, short_addr);
|
|
if ((packet->dst_addr_mode == IEEE802154_FCF_ADDR_EXT)
|
|
&& (short_addr != IEEE802154_NO_ADDR16)) {
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, ", Addr: 0x%04x", short_addr);
|
|
}
|
|
offset += 2;
|
|
/* Update the address table. */
|
|
if ((short_addr != IEEE802154_NO_ADDR16) && (packet->dst_addr_mode == IEEE802154_FCF_ADDR_EXT)) {
|
|
ieee802154_addr_update(&ieee802154_map, short_addr, packet->dst_pan, packet->dst64,
|
|
pinfo->current_proto, pinfo->fd->num);
|
|
}
|
|
|
|
/* Get and display the channel page, if it exists. Added in IEEE802.15.4-2006 */
|
|
if (tvb_bytes_exist(tvb, offset, 1)) {
|
|
guint8 channel_page = tvb_get_guint8(tvb, offset);
|
|
if (tree) proto_tree_add_uint(subtree, hf_ieee802154_realign_channel_page, tvb, offset, 1, channel_page);
|
|
offset += 1;
|
|
}
|
|
|
|
/* Fix the length of the command subtree. */
|
|
if (tree) {
|
|
proto_item_set_len(subitem, offset);
|
|
}
|
|
|
|
/* Call the data dissector for any leftover bytes. */
|
|
if (tvb_length(tvb) > offset) {
|
|
call_dissector(data_handle, tvb_new_subset_remaining(tvb, offset), pinfo, tree);
|
|
}
|
|
} /* dissect_ieee802154_realign */
|
|
|
|
/*FUNCTION:------------------------------------------------------
|
|
* NAME
|
|
* dissect_ieee802154_gtsreq
|
|
* DESCRIPTION
|
|
* Command subdissector routine for the GTS request command.
|
|
*
|
|
* Assumes that COL_INFO will be set to the command name,
|
|
* command name will already be appended to the command subtree
|
|
* and protocol root. In addition, assumes that the command ID
|
|
* has already been parsed.
|
|
* PARAMETERS
|
|
* tvbuff_t *tvb - pointer to buffer containing raw packet.
|
|
* packet_info *pinfo - pointer to packet information fields (unused).
|
|
* proto_tree *tree - pointer to protocol tree.
|
|
* ieee802154_packet *packet - IEEE 802.15.4 packet information (unused).
|
|
* RETURNS
|
|
* void
|
|
*---------------------------------------------------------------
|
|
*/
|
|
static const true_false_string tfs_gtsreq_dir = { "Receive", "Transmit" };
|
|
static const true_false_string tfs_gtsreq_type= { "Allocate GTS", "Deallocate GTS" };
|
|
|
|
static void
|
|
dissect_ieee802154_gtsreq(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, ieee802154_packet *packet)
|
|
{
|
|
proto_tree *subtree;
|
|
static const int * characteristics[] = {
|
|
&hf_ieee802154_gtsreq_len,
|
|
&hf_ieee802154_gtsreq_dir,
|
|
&hf_ieee802154_gtsreq_type,
|
|
NULL
|
|
};
|
|
|
|
/* Create a subtree for this command frame. */
|
|
subtree = proto_tree_add_subtree(tree, tvb, 0, 1, ett_ieee802154_cmd, NULL,
|
|
val_to_str_const(packet->command_id, ieee802154_cmd_names, "Unknown Command"));
|
|
|
|
proto_tree_add_bitmask_list(subtree, tvb, 0, 1, characteristics, ENC_NA);
|
|
|
|
/* Call the data dissector for any leftover bytes. */
|
|
if (tvb_reported_length(tvb) > 1) {
|
|
call_dissector(data_handle, tvb_new_subset_remaining(tvb, 1), pinfo, tree);
|
|
}
|
|
} /* dissect_ieee802154_gtsreq */
|
|
|
|
/*FUNCTION:------------------------------------------------------
|
|
* NAME
|
|
* dissect_ieee802154_command
|
|
* DESCRIPTION
|
|
* Subdissector routine all commands.
|
|
* PARAMETERS
|
|
* tvbuff_t *tvb - pointer to buffer containing raw packet.
|
|
* packet_info *pinfo - pointer to packet information fields (unused).
|
|
* proto_tree *tree - pointer to protocol tree.
|
|
* ieee802154_packet *packet - IEEE 802.15.4 packet information (unused).
|
|
* RETURNS
|
|
* void
|
|
*---------------------------------------------------------------
|
|
*/
|
|
static void
|
|
dissect_ieee802154_command(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, ieee802154_packet *packet)
|
|
{
|
|
switch (packet->command_id) {
|
|
case IEEE802154_CMD_ASRQ:
|
|
IEEE802154_CMD_ADDR_CHECK(pinfo, tree, packet->command_id,
|
|
(packet->src_addr_mode == IEEE802154_FCF_ADDR_EXT) &&
|
|
(packet->dst_addr_mode != IEEE802154_FCF_ADDR_NONE));
|
|
dissect_ieee802154_assoc_req(tvb, pinfo, tree, packet);
|
|
break;
|
|
|
|
case IEEE802154_CMD_ASRSP:
|
|
IEEE802154_CMD_ADDR_CHECK(pinfo, tree, packet->command_id,
|
|
(packet->src_addr_mode == IEEE802154_FCF_ADDR_EXT) &&
|
|
(packet->dst_addr_mode == IEEE802154_FCF_ADDR_EXT));
|
|
dissect_ieee802154_assoc_rsp(tvb, pinfo, tree, packet);
|
|
break;
|
|
|
|
case IEEE802154_CMD_DISAS:
|
|
IEEE802154_CMD_ADDR_CHECK(pinfo, tree, packet->command_id,
|
|
(packet->src_addr_mode == IEEE802154_FCF_ADDR_EXT) &&
|
|
(packet->dst_addr_mode == IEEE802154_FCF_ADDR_EXT));
|
|
dissect_ieee802154_disassoc(tvb, pinfo, tree, packet);
|
|
return;
|
|
|
|
case IEEE802154_CMD_DATA_RQ:
|
|
IEEE802154_CMD_ADDR_CHECK(pinfo, tree, packet->command_id, packet->src_addr_mode != IEEE802154_FCF_ADDR_NONE);
|
|
/* No payload expected. */
|
|
break;
|
|
|
|
case IEEE802154_CMD_PANID_ERR:
|
|
IEEE802154_CMD_ADDR_CHECK(pinfo, tree, packet->command_id,
|
|
(packet->src_addr_mode == IEEE802154_FCF_ADDR_EXT) &&
|
|
(packet->dst_addr_mode == IEEE802154_FCF_ADDR_EXT));
|
|
/* No payload expected. */
|
|
break;
|
|
|
|
case IEEE802154_CMD_ORPH_NOTIF:
|
|
IEEE802154_CMD_ADDR_CHECK(pinfo, tree, packet->command_id,
|
|
(packet->src_addr_mode == IEEE802154_FCF_ADDR_EXT) &&
|
|
(packet->dst_addr_mode == IEEE802154_FCF_ADDR_SHORT) &&
|
|
(packet->dst16 == IEEE802154_BCAST_ADDR) &&
|
|
(packet->src_pan == IEEE802154_BCAST_PAN) &&
|
|
(packet->dst_pan == IEEE802154_BCAST_PAN));
|
|
/* No payload expected. */
|
|
break;
|
|
|
|
case IEEE802154_CMD_BCN_RQ:
|
|
IEEE802154_CMD_ADDR_CHECK(pinfo, tree, packet->command_id,
|
|
(packet->dst_addr_mode == IEEE802154_FCF_ADDR_SHORT) &&
|
|
(packet->src_addr_mode == IEEE802154_FCF_ADDR_NONE) &&
|
|
(packet->dst16 == IEEE802154_BCAST_ADDR) &&
|
|
(packet->dst_pan == IEEE802154_BCAST_PAN));
|
|
/* No payload expected. */
|
|
break;
|
|
|
|
case IEEE802154_CMD_COORD_REAL:
|
|
IEEE802154_CMD_ADDR_CHECK(pinfo, tree, packet->command_id,
|
|
(packet->src_addr_mode == IEEE802154_FCF_ADDR_EXT) &&
|
|
(packet->dst_pan == IEEE802154_BCAST_PAN) &&
|
|
(packet->dst_addr_mode != IEEE802154_FCF_ADDR_NONE));
|
|
if (packet->dst_addr_mode == IEEE802154_FCF_ADDR_SHORT) {
|
|
/* If directed to a 16-bit address, check that it is being broadcast. */
|
|
IEEE802154_CMD_ADDR_CHECK(pinfo, tree, packet->command_id, packet->dst16 == IEEE802154_BCAST_ADDR);
|
|
}
|
|
dissect_ieee802154_realign(tvb, pinfo, tree, packet);
|
|
return;
|
|
|
|
case IEEE802154_CMD_GTS_REQ:
|
|
/* Check that the addressing is correct for this command type. */
|
|
IEEE802154_CMD_ADDR_CHECK(pinfo, tree, packet->command_id,
|
|
(packet->src_addr_mode == IEEE802154_FCF_ADDR_SHORT) &&
|
|
(packet->dst_addr_mode == IEEE802154_FCF_ADDR_NONE) &&
|
|
(packet->src16 != IEEE802154_BCAST_ADDR) &&
|
|
(packet->src16 != IEEE802154_NO_ADDR16));
|
|
dissect_ieee802154_gtsreq(tvb, pinfo, tree, packet);
|
|
return;
|
|
} /* switch */
|
|
|
|
/* Dump unexpected, or unknown command payloads. */
|
|
call_dissector(data_handle, tvb, pinfo, tree);
|
|
} /* dissect_ieee802154_command */
|
|
|
|
/*FUNCTION:------------------------------------------------------
|
|
* NAME
|
|
* dissect_ieee802154_decrypt
|
|
* DESCRIPTION
|
|
* IEEE 802.15.4 decryption algorithm. Tries to find the
|
|
* appropriate key from the information in the IEEE 802.15.4
|
|
* packet structure and dissector config.
|
|
*
|
|
* This function implements the security proceedures for the
|
|
* 2006 version of the spec only. IEEE 802.15.4-2003 is
|
|
* unsupported.
|
|
* PARAMETERS
|
|
* tvbuff_t *tvb - IEEE 802.15.4 packet.
|
|
* packet_info *pinfo - Packet info structure.
|
|
* guint offset - Offset where the ciphertext 'c' starts.
|
|
* ieee802154_packet *packet - IEEE 802.15.4 packet information.
|
|
* ws_decrypt_status *status - status of decryption returned through here on failure.
|
|
* RETURNS
|
|
* tvbuff_t * - Decrypted payload.
|
|
*---------------------------------------------------------------
|
|
*/
|
|
static tvbuff_t *
|
|
dissect_ieee802154_decrypt(tvbuff_t *tvb, guint offset, packet_info *pinfo, ieee802154_packet *packet, ws_decrypt_status *status)
|
|
{
|
|
tvbuff_t *ptext_tvb;
|
|
gboolean have_mic = FALSE;
|
|
guint64 srcAddr;
|
|
unsigned char key[16];
|
|
unsigned char tmp[16];
|
|
unsigned char rx_mic[16];
|
|
guint M;
|
|
gint captured_len;
|
|
gint reported_len;
|
|
ieee802154_hints_t *ieee_hints;
|
|
|
|
/*
|
|
* Check the version; we only support IEEE 802.15.4-2003 and IEEE 802.15.4-2006.
|
|
* We must do this first, as, if this isn't IEEE 802.15.4-2003 or IEEE 802.15.4-2006,
|
|
* we don't have the Auxiliary Security Header, and haven't
|
|
* filled in the information for it, and none of the stuff
|
|
* we do afterwards, which uses that information, is doable.
|
|
*/
|
|
if ((packet->version != IEEE802154_VERSION_2006) && (packet->version != IEEE802154_VERSION_2003)) {
|
|
*status = DECRYPT_VERSION_UNSUPPORTED;
|
|
return NULL;
|
|
}
|
|
|
|
ieee_hints = (ieee802154_hints_t *)p_get_proto_data(wmem_file_scope(), pinfo, proto_ieee802154, 0);
|
|
|
|
/* Get the captured and on-the-wire length of the payload. */
|
|
M = IEEE802154_MIC_LENGTH(packet->security_level);
|
|
reported_len = tvb_reported_length_remaining(tvb, offset) - IEEE802154_FCS_LEN - M;
|
|
if (reported_len < 0) {
|
|
*status = DECRYPT_PACKET_TOO_SMALL;
|
|
return NULL;
|
|
}
|
|
/* Check of the payload is truncated. */
|
|
if (tvb_bytes_exist(tvb, offset, reported_len)) {
|
|
captured_len = reported_len;
|
|
}
|
|
else {
|
|
captured_len = tvb_length_remaining(tvb, offset);
|
|
}
|
|
|
|
/* Check if the MIC is present in the captured data. */
|
|
have_mic = tvb_bytes_exist(tvb, offset + reported_len, M);
|
|
if (have_mic) {
|
|
tvb_memcpy(tvb, rx_mic, offset + reported_len, M);
|
|
}
|
|
|
|
/*=====================================================
|
|
* Key Lookup - Need to find the appropriate key.
|
|
*=====================================================
|
|
*/
|
|
/*
|
|
* Oh God! The specification is so bad. This is the worst
|
|
* case of design-by-committee I've ever seen in my life.
|
|
* The IEEE has created an unintelligable mess in order
|
|
* to decipher which key is used for which message.
|
|
*
|
|
* Let's hope it's simpler to implement for dissecting only.
|
|
*
|
|
* Also need to find the extended address of the sender.
|
|
*/
|
|
if (packet->src_addr_mode == IEEE802154_FCF_ADDR_EXT) {
|
|
/* The source EUI-64 is included in the headers. */
|
|
srcAddr = packet->src64;
|
|
}
|
|
else if (ieee_hints && ieee_hints->map_rec && ieee_hints->map_rec->addr64) {
|
|
/* Use the hint */
|
|
srcAddr = ieee_hints->map_rec->addr64;
|
|
}
|
|
else {
|
|
/* Lookup failed. */
|
|
*status = DECRYPT_PACKET_NO_EXT_SRC_ADDR;
|
|
return NULL;
|
|
}
|
|
|
|
/* Lookup the key. */
|
|
/*
|
|
* TODO: What this dissector really needs is a UAT to store multiple keys
|
|
* and a variety of key configuration data. However, a single shared key
|
|
* should be sufficient to get packet encryption off to a start.
|
|
*/
|
|
if (!ieee802154_key_valid) {
|
|
*status = DECRYPT_PACKET_NO_KEY;
|
|
return NULL;
|
|
}
|
|
memcpy(key, ieee802154_key, IEEE802154_CIPHER_SIZE);
|
|
|
|
/*=====================================================
|
|
* CCM* - CTR mode payload encryption
|
|
*=====================================================
|
|
*/
|
|
/* Create the CCM* initial block for decryption (Adata=0, M=0, counter=0). */
|
|
ccm_init_block(tmp, FALSE, 0, srcAddr, packet, 0);
|
|
|
|
/* Decrypt the ciphertext, and place the plaintext in a new tvb. */
|
|
if (IEEE802154_IS_ENCRYPTED(packet->security_level) && captured_len) {
|
|
guint8 *text;
|
|
/*
|
|
* Make a copy of the ciphertext in heap memory.
|
|
*
|
|
* We will decrypt the message in-place and then use the buffer as the
|
|
* real data for the new tvb.
|
|
*/
|
|
text = (guint8 *)tvb_memdup(NULL, tvb, offset, captured_len);
|
|
|
|
/* Perform CTR-mode transformation. */
|
|
if (!ccm_ctr_encrypt(key, tmp, rx_mic, text, captured_len)) {
|
|
g_free(text);
|
|
*status = DECRYPT_PACKET_DECRYPT_FAILED;
|
|
return NULL;
|
|
}
|
|
|
|
/* Create a tvbuff for the plaintext. */
|
|
ptext_tvb = tvb_new_child_real_data(tvb, text, captured_len, reported_len);
|
|
tvb_set_free_cb(ptext_tvb, g_free);
|
|
add_new_data_source(pinfo, ptext_tvb, "Decrypted IEEE 802.15.4 payload");
|
|
*status = DECRYPT_PACKET_SUCCEEDED;
|
|
}
|
|
/* There is no ciphertext. Wrap the plaintext in a new tvb. */
|
|
else {
|
|
/* Decrypt the MIC (if present). */
|
|
if ((have_mic) && (!ccm_ctr_encrypt(key, tmp, rx_mic, NULL, 0))) {
|
|
*status = DECRYPT_PACKET_DECRYPT_FAILED;
|
|
return NULL;
|
|
}
|
|
|
|
/* Create a tvbuff for the plaintext. This might result in a zero-length tvbuff. */
|
|
ptext_tvb = tvb_new_subset(tvb, offset, captured_len, reported_len);
|
|
*status = DECRYPT_PACKET_SUCCEEDED;
|
|
}
|
|
|
|
/*=====================================================
|
|
* CCM* - CBC-mode message authentication
|
|
*=====================================================
|
|
*/
|
|
/* We can only verify the message if the MIC wasn't truncated. */
|
|
if (have_mic) {
|
|
unsigned char dec_mic[16];
|
|
guint l_m = captured_len;
|
|
guint l_a = offset;
|
|
|
|
/* Adjust the lengths of the plantext and additional data if unencrypted. */
|
|
if (!IEEE802154_IS_ENCRYPTED(packet->security_level)) {
|
|
l_a += l_m;
|
|
l_m = 0;
|
|
}
|
|
else if ((packet->version == IEEE802154_VERSION_2003) && !ieee802154_extend_auth)
|
|
l_a -= 5; /* Exclude Frame Counter (4 bytes) and Key Sequence Counter (1 byte) from authentication data */
|
|
|
|
|
|
/* Create the CCM* initial block for authentication (Adata!=0, M!=0, counter=l(m)). */
|
|
ccm_init_block(tmp, TRUE, M, srcAddr, packet, l_m);
|
|
|
|
/* Compute CBC-MAC authentication tag. */
|
|
/*
|
|
* And yes, despite the warning in tvbuff.h, I think tvb_get_ptr is the
|
|
* right function here since either A) the payload wasn't encrypted, in
|
|
* which case l_m is zero, or B) the payload was encrypted, and the tvb
|
|
* already points to contiguous memory, since we just allocated it in
|
|
* decryption phase.
|
|
*/
|
|
if (!ccm_cbc_mac(key, tmp, (const gchar *)tvb_memdup(wmem_packet_scope(), tvb, 0, l_a), l_a, tvb_get_ptr(ptext_tvb, 0, l_m), l_m, dec_mic)) {
|
|
*status = DECRYPT_PACKET_MIC_CHECK_FAILED;
|
|
}
|
|
/* Compare the received MIC with the one we generated. */
|
|
else if (memcmp(rx_mic, dec_mic, M) != 0) {
|
|
*status = DECRYPT_PACKET_MIC_CHECK_FAILED;
|
|
}
|
|
}
|
|
|
|
/* Done! */
|
|
return ptext_tvb;
|
|
} /* dissect_ieee802154_decrypt */
|
|
|
|
/*FUNCTION:------------------------------------------------------
|
|
* NAME
|
|
* ccm_init_block
|
|
* DESCRIPTION
|
|
* Creates the CCM* initial block value for IEEE 802.15.4.
|
|
* PARAMETERS
|
|
* gchar *block - Output pointer for the initial block.
|
|
* gboolean adata - TRUE if additional auth data is present
|
|
* gint M - CCM* parameter M.
|
|
* guint64 addr - Source extended address.
|
|
* ieee802154_packet *packet - IEEE 802.15.4 packet information.
|
|
* guint16 ctr_val - Value in the last L bytes of the block.
|
|
* RETURNS
|
|
* void
|
|
*---------------------------------------------------------------
|
|
*/
|
|
static void
|
|
ccm_init_block(gchar *block, gboolean adata, gint M, guint64 addr, ieee802154_packet *packet, gint ctr_val)
|
|
{
|
|
gint i = 0;
|
|
|
|
/* Flags: Reserved(0) || Adata || (M-2)/2 || (L-1) */
|
|
block[i] = (0x2 - 1); /* (L-1) */
|
|
if (M > 0) block[i] |= (((M-2)/2) << 3); /* (M-2)/2 */
|
|
if (adata) block[i] |= (1 << 6); /* Adata */
|
|
i++;
|
|
/* 2003 CCM Nonce: Source Address || Frame Counter || Key Sequence Counter */
|
|
/* 2006 CCM* Nonce: Source Address || Frame Counter || Security Level */
|
|
block[i++] = (guint8)((addr >> 56) & 0xff);
|
|
block[i++] = (guint8)((addr >> 48) & 0xff);
|
|
block[i++] = (guint8)((addr >> 40) & 0xff);
|
|
block[i++] = (guint8)((addr >> 32) & 0xff);
|
|
block[i++] = (guint8)((addr >> 24) & 0xff);
|
|
block[i++] = (guint8)((addr >> 16) & 0xff);
|
|
block[i++] = (guint8)((addr >> 8) & 0xff);
|
|
block[i++] = (guint8)((addr >> 0) & 0xff);
|
|
block[i++] = (guint8)((packet->frame_counter >> 24) & 0xff);
|
|
block[i++] = (guint8)((packet->frame_counter >> 16) & 0xff);
|
|
block[i++] = (guint8)((packet->frame_counter >> 8) & 0xff);
|
|
block[i++] = (guint8)((packet->frame_counter >> 0) & 0xff);
|
|
if (packet->version == IEEE802154_VERSION_2003)
|
|
block[i++] = packet->key_sequence_counter;
|
|
else
|
|
block[i++] = packet->security_level;
|
|
/* Plaintext length. */
|
|
block[i++] = (guint8)((ctr_val >> 8) & 0xff);
|
|
block[i] = (guint8)((ctr_val >> 0) & 0xff);
|
|
} /* ccm_init_block */
|
|
|
|
/*FUNCTION:------------------------------------------------------
|
|
* NAME
|
|
* ccm_ctr_encrypt
|
|
* DESCRIPTION
|
|
* Performs an in-place CTR-mode encryption/decryption.
|
|
* PARAMETERS
|
|
* const gchar *key - Encryption Key.
|
|
* const gchar *iv - Counter initial value.
|
|
* gchar *mic - MIC to encrypt/decrypt.
|
|
* gchar *data - Buffer to encrypt/decrypt.
|
|
* gint length - Length of the buffer.
|
|
* RETURNS
|
|
* gboolean - TRUE on SUCCESS, FALSE on error.
|
|
*---------------------------------------------------------------
|
|
*/
|
|
#ifdef HAVE_LIBGCRYPT
|
|
static gboolean
|
|
ccm_ctr_encrypt(const gchar *key, const gchar *iv, gchar *mic, gchar *data, gint length)
|
|
{
|
|
gcry_cipher_hd_t cipher_hd;
|
|
|
|
/* Open the cipher. */
|
|
if (gcry_cipher_open(&cipher_hd, GCRY_CIPHER_AES128, GCRY_CIPHER_MODE_CTR, 0)) {
|
|
return FALSE;
|
|
}
|
|
|
|
/* Set the key and initial value. */
|
|
if (gcry_cipher_setkey(cipher_hd, key, 16)) {
|
|
gcry_cipher_close(cipher_hd);
|
|
return FALSE;
|
|
}
|
|
if (gcry_cipher_setctr(cipher_hd, iv, 16)) {
|
|
gcry_cipher_close(cipher_hd);
|
|
return FALSE;
|
|
}
|
|
|
|
/* Decrypt the MIC. */
|
|
if (gcry_cipher_encrypt(cipher_hd, mic, 16, NULL, 0)) {
|
|
gcry_cipher_close(cipher_hd);
|
|
return FALSE;
|
|
}
|
|
/* Decrypt the payload. */
|
|
if (gcry_cipher_encrypt(cipher_hd, data, length, NULL, 0)) {
|
|
gcry_cipher_close(cipher_hd);
|
|
return FALSE;
|
|
}
|
|
|
|
/* Done with the cipher. */
|
|
gcry_cipher_close(cipher_hd);
|
|
return TRUE;
|
|
} /* ccm_ctr_encrypt */
|
|
#else
|
|
static gboolean
|
|
ccm_ctr_encrypt(const gchar *key _U_, const gchar *iv _U_, gchar *mic _U_, gchar *data _U_, gint length _U_)
|
|
{
|
|
return FALSE;
|
|
}
|
|
#endif /* HAVE_LIBGCRYPT */
|
|
|
|
/*FUNCTION:------------------------------------------------------
|
|
* NAME
|
|
* ccm_cbc_mac
|
|
* DESCRIPTION
|
|
* Generates a CBC-MAC of the decrypted payload and additional
|
|
* authentication headers.
|
|
* PARAMETERS
|
|
* const gchar key - Encryption Key.
|
|
* const gchar iv - Counter initial value.
|
|
* const gchar a - Additional auth headers.
|
|
* gint a_len - Length of the additional headers.
|
|
* const gchar m - Plaintext message.
|
|
* gint m_len - Length of plaintext message.
|
|
* gchar *mic - Output for CBC-MAC.
|
|
* RETURNS
|
|
* gboolean - TRUE on SUCCESS, FALSE on error.
|
|
*---------------------------------------------------------------
|
|
*/
|
|
#ifdef HAVE_LIBGCRYPT
|
|
static gboolean
|
|
ccm_cbc_mac(const gchar *key, const gchar *iv, const gchar *a, gint a_len, const gchar *m, gint m_len, gchar *mic)
|
|
{
|
|
gcry_cipher_hd_t cipher_hd;
|
|
guint i = 0;
|
|
unsigned char block[16];
|
|
|
|
/* Open the cipher. */
|
|
if (gcry_cipher_open(&cipher_hd, GCRY_CIPHER_AES128, GCRY_CIPHER_MODE_CBC, GCRY_CIPHER_CBC_MAC)) return FALSE;
|
|
|
|
/* Set the key. */
|
|
if (gcry_cipher_setkey(cipher_hd, key, 16)) {
|
|
gcry_cipher_close(cipher_hd);
|
|
return FALSE;
|
|
}
|
|
|
|
/* Process the initial value. */
|
|
if (gcry_cipher_encrypt(cipher_hd, mic, 16, iv, 16)) {
|
|
gcry_cipher_close(cipher_hd);
|
|
return FALSE;
|
|
}
|
|
|
|
/* Encode L(a) */
|
|
i = 0;
|
|
|
|
/* XXX: GINT_MAX is not defined so #if ... will always be false */
|
|
#if (GINT_MAX >= (1LL << 32))
|
|
if (a_len >= (1LL << 32)) {
|
|
block[i++] = 0xff;
|
|
block[i++] = 0xff;
|
|
block[i++] = (a_len >> 56) & 0xff;
|
|
block[i++] = (a_len >> 48) & 0xff;
|
|
block[i++] = (a_len >> 40) & 0xff;
|
|
block[i++] = (a_len >> 32) & 0xff;
|
|
block[i++] = (a_len >> 24) & 0xff;
|
|
block[i++] = (a_len >> 16) & 0xff;
|
|
block[i++] = (a_len >> 8) & 0xff;
|
|
block[i++] = (a_len >> 0) & 0xff;
|
|
}
|
|
else
|
|
#endif
|
|
if (a_len >= ((1 << 16) - (1 << 8))) {
|
|
block[i++] = 0xff;
|
|
block[i++] = 0xfe;
|
|
block[i++] = (a_len >> 24) & 0xff;
|
|
block[i++] = (a_len >> 16) & 0xff;
|
|
block[i++] = (a_len >> 8) & 0xff;
|
|
block[i++] = (a_len >> 0) & 0xff;
|
|
}
|
|
else {
|
|
block[i++] = (a_len >> 8) & 0xff;
|
|
block[i++] = (a_len >> 0) & 0xff;
|
|
}
|
|
/* Append a to get the first block of input (pad if we encounter the end of a). */
|
|
while ((i < sizeof(block)) && (a_len-- > 0)) block[i++] = *a++;
|
|
while (i < sizeof(block)) block[i++] = 0;
|
|
|
|
/* Process the first block of AuthData. */
|
|
if (gcry_cipher_encrypt(cipher_hd, mic, 16, block, 16)) {
|
|
gcry_cipher_close(cipher_hd);
|
|
return FALSE;
|
|
}
|
|
|
|
/* Transform and process the remainder of a. */
|
|
while (a_len > 0) {
|
|
/* Copy and pad. */
|
|
if ((guint)a_len >= sizeof(block)) memcpy(block, a, sizeof(block));
|
|
else {memcpy(block, a, a_len); memset(block+a_len, 0, sizeof(block)-a_len);}
|
|
/* Adjust pointers. */
|
|
a += sizeof(block);
|
|
a_len -= (int)sizeof(block);
|
|
/* Execute the CBC-MAC algorithm. */
|
|
if (gcry_cipher_encrypt(cipher_hd, mic, 16, block, sizeof(block))) {
|
|
gcry_cipher_close(cipher_hd);
|
|
return FALSE;
|
|
}
|
|
} /* while */
|
|
|
|
/* Process the message, m. */
|
|
while (m_len > 0) {
|
|
/* Copy and pad. */
|
|
if ((guint)m_len >= sizeof(block)) memcpy(block, m, sizeof(block));
|
|
else {memcpy(block, m, m_len); memset(block+m_len, 0, sizeof(block)-m_len);}
|
|
/* Adjust pointers. */
|
|
m += sizeof(block);
|
|
m_len -= (int)sizeof(block);
|
|
/* Execute the CBC-MAC algorithm. */
|
|
if (gcry_cipher_encrypt(cipher_hd, mic, 16, block, sizeof(block))) {
|
|
gcry_cipher_close(cipher_hd);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
/* Done with the cipher. */
|
|
gcry_cipher_close(cipher_hd);
|
|
return TRUE;
|
|
} /* ccm_cbc_mac */
|
|
#else
|
|
static gboolean
|
|
ccm_cbc_mac(const gchar *key _U_, const gchar *iv _U_,
|
|
const gchar *a _U_, gint a_len _U_, const gchar *m _U_, gint m_len _U_, gchar *mic _U_)
|
|
{
|
|
return FALSE;
|
|
}
|
|
#endif /* HAVE_LIBGCRYPT */
|
|
|
|
/* Key hash function. */
|
|
guint ieee802154_short_addr_hash(gconstpointer key)
|
|
{
|
|
return (((const ieee802154_short_addr *)key)->addr) | (((const ieee802154_short_addr *)key)->pan << 16);
|
|
}
|
|
|
|
/* Key equal function. */
|
|
gboolean ieee802154_short_addr_equal(gconstpointer a, gconstpointer b)
|
|
{
|
|
return (((const ieee802154_short_addr *)a)->pan == ((const ieee802154_short_addr *)b)->pan) &&
|
|
(((const ieee802154_short_addr *)a)->addr == ((const ieee802154_short_addr *)b)->addr);
|
|
}
|
|
|
|
/* Key hash function. */
|
|
guint ieee802154_long_addr_hash(gconstpointer key)
|
|
{
|
|
return (guint)(((const ieee802154_long_addr *)key)->addr) & 0xFFFFFFFF;
|
|
}
|
|
|
|
/* Key equal function. */
|
|
gboolean ieee802154_long_addr_equal(gconstpointer a, gconstpointer b)
|
|
{
|
|
return (((const ieee802154_long_addr *)a)->addr == ((const ieee802154_long_addr *)b)->addr);
|
|
}
|
|
|
|
/*FUNCTION:------------------------------------------------------
|
|
* NAME
|
|
* ieee802154_addr_update
|
|
* DESCRIPTION
|
|
* Creates a record that maps the given short address and pan
|
|
* to a long (extended) address.
|
|
* PARAMETERS
|
|
* guint16 short_addr - 16-bit short address
|
|
* guint16 pan - 16-bit PAN id
|
|
* guint64 long_addr - 64-bit long (extended) address
|
|
* const char * - Pointer to name of current protocol
|
|
* guint - Frame number this mapping became valid
|
|
* RETURNS
|
|
* TRUE - Record was updated
|
|
* FALSE - Couldn't find it
|
|
*---------------------------------------------------------------
|
|
*/
|
|
ieee802154_map_rec *ieee802154_addr_update(ieee802154_map_tab_t *au_ieee802154_map,
|
|
guint16 short_addr, guint16 pan, guint64 long_addr, const char *proto, guint fnum)
|
|
{
|
|
ieee802154_short_addr addr16;
|
|
ieee802154_map_rec *p_map_rec;
|
|
gpointer old_key;
|
|
|
|
/* Look up short address hash */
|
|
addr16.pan = pan;
|
|
addr16.addr = short_addr;
|
|
p_map_rec = (ieee802154_map_rec *)g_hash_table_lookup(au_ieee802154_map->short_table, &addr16);
|
|
|
|
/* Update mapping record */
|
|
if (p_map_rec) {
|
|
/* record already exists */
|
|
if ( p_map_rec->addr64 == long_addr ) {
|
|
/* no change */
|
|
return p_map_rec;
|
|
}
|
|
else {
|
|
/* mark current mapping record invalid */
|
|
p_map_rec->end_fnum = fnum;
|
|
}
|
|
}
|
|
|
|
/* create a new mapping record */
|
|
p_map_rec = wmem_new(wmem_file_scope(), ieee802154_map_rec);
|
|
p_map_rec->proto = proto;
|
|
p_map_rec->start_fnum = fnum;
|
|
p_map_rec->end_fnum = 0;
|
|
p_map_rec->addr64 = long_addr;
|
|
|
|
/* link new mapping record to addr hash tables */
|
|
if ( g_hash_table_lookup_extended(au_ieee802154_map->short_table, &addr16, &old_key, NULL) ) {
|
|
/* update short addr hash table, reusing pointer to old key */
|
|
g_hash_table_insert(au_ieee802154_map->short_table, old_key, p_map_rec);
|
|
} else {
|
|
/* create new hash entry */
|
|
g_hash_table_insert(au_ieee802154_map->short_table, wmem_memdup(wmem_file_scope(), &addr16, sizeof(addr16)), p_map_rec);
|
|
}
|
|
|
|
if ( g_hash_table_lookup_extended(au_ieee802154_map->long_table, &long_addr, &old_key, NULL) ) {
|
|
/* update long addr hash table, reusing pointer to old key */
|
|
g_hash_table_insert(au_ieee802154_map->long_table, old_key, p_map_rec);
|
|
} else {
|
|
/* create new hash entry */
|
|
g_hash_table_insert(au_ieee802154_map->long_table, wmem_memdup(wmem_file_scope(), &long_addr, sizeof(long_addr)), p_map_rec);
|
|
}
|
|
|
|
return p_map_rec;
|
|
} /* ieee802154_addr_update */
|
|
|
|
/*FUNCTION:------------------------------------------------------
|
|
* NAME
|
|
* ieee802154_short_addr_invalidate
|
|
* DESCRIPTION
|
|
* Marks a mapping record associated with device with short_addr
|
|
* as invalid at a certain frame number, typically when a
|
|
* dissassociation occurs.
|
|
* PARAMETERS
|
|
* guint16 short_addr - 16-bit short address
|
|
* guint16 pan - 16-bit PAN id
|
|
* guint - Frame number when mapping became invalid
|
|
* RETURNS
|
|
* TRUE - Record was updated
|
|
* FALSE - Couldn't find it
|
|
*---------------------------------------------------------------
|
|
*/
|
|
gboolean ieee802154_short_addr_invalidate(guint16 short_addr, guint16 pan, guint fnum)
|
|
{
|
|
ieee802154_short_addr addr16;
|
|
ieee802154_map_rec *map_rec;
|
|
|
|
addr16.pan = pan;
|
|
addr16.addr = short_addr;
|
|
|
|
map_rec = (ieee802154_map_rec *)g_hash_table_lookup(ieee802154_map.short_table, &addr16);
|
|
if ( map_rec ) {
|
|
/* indicates this mapping is invalid at frame fnum */
|
|
map_rec->end_fnum = fnum;
|
|
return TRUE;
|
|
}
|
|
|
|
return FALSE;
|
|
} /* ieee802154_short_addr_invalidate */
|
|
|
|
/*FUNCTION:------------------------------------------------------
|
|
* NAME
|
|
* ieee802154_long_addr_invalidate
|
|
* DESCRIPTION
|
|
* Marks a mapping record associated with device with long_addr
|
|
* as invalid at a certain frame number, typically when a
|
|
* dissassociation occurs.
|
|
* PARAMETERS
|
|
* guint64 long_addr - 16-bit short address
|
|
* guint - Frame number when mapping became invalid
|
|
* RETURNS
|
|
* TRUE - If record was updated
|
|
* FALSE - If record wasn't updated
|
|
*---------------------------------------------------------------
|
|
*/
|
|
gboolean ieee802154_long_addr_invalidate(guint64 long_addr, guint fnum)
|
|
{
|
|
ieee802154_map_rec *map_rec;
|
|
|
|
map_rec = (ieee802154_map_rec *)g_hash_table_lookup(ieee802154_map.long_table, &long_addr);
|
|
if ( map_rec ) {
|
|
/* indicates this mapping is invalid at frame fnum */
|
|
map_rec->end_fnum = fnum;
|
|
return TRUE;
|
|
}
|
|
|
|
return FALSE;
|
|
} /* ieee802154_long_addr_invalidate */
|
|
|
|
/*FUNCTION:------------------------------------------------------
|
|
* NAME
|
|
* proto_init_ieee802154
|
|
* DESCRIPTION
|
|
* Init routine for the IEEE 802.15.4 dissector. Creates hash
|
|
* tables for mapping between 16-bit to 64-bit addresses and
|
|
* populates them with static address pairs from a UAT
|
|
* preference table.
|
|
* PARAMETERS
|
|
* none
|
|
* RETURNS
|
|
* void
|
|
*---------------------------------------------------------------
|
|
*/
|
|
static void
|
|
proto_init_ieee802154(void)
|
|
{
|
|
guint i;
|
|
|
|
/* Destroy hash tables, if they exist. */
|
|
if (ieee802154_map.short_table)
|
|
g_hash_table_destroy(ieee802154_map.short_table);
|
|
if (ieee802154_map.long_table)
|
|
g_hash_table_destroy(ieee802154_map.long_table);
|
|
|
|
/* Create the hash tables. */
|
|
ieee802154_map.short_table = g_hash_table_new(ieee802154_short_addr_hash, ieee802154_short_addr_equal);
|
|
ieee802154_map.long_table = g_hash_table_new(ieee802154_long_addr_hash, ieee802154_long_addr_equal);
|
|
/* Re-load the hash table from the static address UAT. */
|
|
for (i=0; (i<num_static_addrs) && (static_addrs); i++) {
|
|
ieee802154_addr_update(&ieee802154_map,(guint16)static_addrs[i].addr16, (guint16)static_addrs[i].pan,
|
|
pntoh64(static_addrs[i].eui64), ieee802154_user, IEEE802154_USER_MAPPING);
|
|
} /* for */
|
|
} /* proto_init_ieee802154 */
|
|
|
|
/* Returns the prompt string for the Decode-As dialog. */
|
|
static void ieee802154_da_prompt(packet_info *pinfo _U_, gchar* result)
|
|
{
|
|
ieee802154_hints_t *hints;
|
|
hints = (ieee802154_hints_t *)p_get_proto_data(wmem_file_scope(), pinfo,
|
|
proto_get_id_by_filter_name(IEEE802154_PROTOABBREV_WPAN), 0);
|
|
if (hints)
|
|
g_snprintf(result, MAX_DECODE_AS_PROMPT_LEN, "IEEE 802.15.4 PAN 0x%04x as", hints->src_pan);
|
|
else
|
|
g_snprintf(result, MAX_DECODE_AS_PROMPT_LEN, "IEEE 802.15.4 PAN Unknown");
|
|
} /* iee802154_da_prompt */
|
|
|
|
/* Returns the value to index the panid decode table with (source PAN)*/
|
|
static gpointer ieee802154_da_value(packet_info *pinfo _U_)
|
|
{
|
|
ieee802154_hints_t *hints;
|
|
hints = (ieee802154_hints_t *)p_get_proto_data(wmem_file_scope(), pinfo,
|
|
proto_get_id_by_filter_name(IEEE802154_PROTOABBREV_WPAN), 0);
|
|
if (hints)
|
|
return GUINT_TO_POINTER((guint)(hints->src_pan));
|
|
else
|
|
return NULL;
|
|
} /* iee802154_da_value */
|
|
|
|
/*FUNCTION:------------------------------------------------------
|
|
* NAME
|
|
* proto_register_ieee802154
|
|
* DESCRIPTION
|
|
* IEEE 802.15.4 protocol registration routine.
|
|
* PARAMETERS
|
|
* none
|
|
* RETURNS
|
|
* void
|
|
*---------------------------------------------------------------
|
|
*/
|
|
void proto_register_ieee802154(void)
|
|
{
|
|
/* Protocol fields */
|
|
static hf_register_info hf_phy[] = {
|
|
/* PHY level */
|
|
|
|
{ &hf_ieee802154_nonask_phy_preamble,
|
|
{ "Preamble", "wpan-nonask-phy.preamble", FT_UINT32, BASE_HEX, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_ieee802154_nonask_phy_sfd,
|
|
{ "Start of Frame Delimiter", "wpan-nonask-phy.sfd", FT_UINT8, BASE_HEX, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_ieee802154_nonask_phy_length,
|
|
{ "Frame Length", "wpan-nonask-phy.frame_length", FT_UINT8, BASE_HEX, NULL,
|
|
IEEE802154_PHY_LENGTH_MASK, NULL, HFILL }},
|
|
|
|
{ &hf_ieee802154_nonask_phr,
|
|
{ "PHR", "wpan-nonask-phy.phr", FT_UINT8, BASE_HEX, NULL,
|
|
0x0, NULL, HFILL }},
|
|
};
|
|
|
|
static hf_register_info hf[] = {
|
|
|
|
{ &hf_ieee802154_frame_length,
|
|
{ "Frame Length", "wpan.frame_length", FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
"Frame Length as reported from lower layer", HFILL }},
|
|
|
|
{ &hf_ieee802154_fcf,
|
|
{ "Frame Control Field", "wpan.fcf", FT_UINT16, BASE_HEX, NULL,
|
|
0x0, NULL, HFILL }},
|
|
|
|
{ &hf_ieee802154_frame_type,
|
|
{ "Frame Type", "wpan.frame_type", FT_UINT16, BASE_HEX, VALS(ieee802154_frame_types),
|
|
IEEE802154_FCF_TYPE_MASK, NULL, HFILL }},
|
|
|
|
{ &hf_ieee802154_security,
|
|
{ "Security Enabled", "wpan.security", FT_BOOLEAN, 16, NULL, IEEE802154_FCF_SEC_EN,
|
|
"Whether security operations are performed at the MAC layer or not.", HFILL }},
|
|
|
|
{ &hf_ieee802154_pending,
|
|
{ "Frame Pending", "wpan.pending", FT_BOOLEAN, 16, NULL, IEEE802154_FCF_FRAME_PND,
|
|
"Indication of additional packets waiting to be transferred from the source device.", HFILL }},
|
|
|
|
{ &hf_ieee802154_ack_request,
|
|
{ "Acknowledge Request", "wpan.ack_request", FT_BOOLEAN, 16, NULL, IEEE802154_FCF_ACK_REQ,
|
|
"Whether the sender of this packet requests acknowledgement or not.", HFILL }},
|
|
|
|
{ &hf_ieee802154_intra_pan,
|
|
{ "Intra-PAN", "wpan.intra_pan", FT_BOOLEAN, 16, NULL, IEEE802154_FCF_INTRA_PAN,
|
|
"Whether this packet originated and terminated within the same PAN or not.", HFILL }},
|
|
|
|
{ &hf_ieee802154_seqno,
|
|
{ "Sequence Number", "wpan.seq_no", FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_ieee802154_dst_addr_mode,
|
|
{ "Destination Addressing Mode", "wpan.dst_addr_mode", FT_UINT16, BASE_HEX, VALS(ieee802154_addr_modes),
|
|
IEEE802154_FCF_DADDR_MASK, NULL, HFILL }},
|
|
|
|
{ &hf_ieee802154_src_addr_mode,
|
|
{ "Source Addressing Mode", "wpan.src_addr_mode", FT_UINT16, BASE_HEX, VALS(ieee802154_addr_modes),
|
|
IEEE802154_FCF_SADDR_MASK, NULL, HFILL }},
|
|
|
|
{ &hf_ieee802154_version,
|
|
{ "Frame Version", "wpan.version", FT_UINT16, BASE_DEC, NULL, IEEE802154_FCF_VERSION,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_ieee802154_dst_panID,
|
|
{ "Destination PAN", "wpan.dst_pan", FT_UINT16, BASE_HEX, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_ieee802154_dst16,
|
|
{ "Destination", "wpan.dst16", FT_UINT16, BASE_HEX, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_ieee802154_dst64,
|
|
{ "Destination", "wpan.dst64", FT_EUI64, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_ieee802154_src_panID,
|
|
{ "Source PAN", "wpan.src_pan", FT_UINT16, BASE_HEX, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_ieee802154_src16,
|
|
{ "Source", "wpan.src16", FT_UINT16, BASE_HEX, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_ieee802154_src64,
|
|
{ "Extended Source", "wpan.src64", FT_EUI64, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_ieee802154_src64_origin,
|
|
{ "Origin", "wpan.src64.origin", FT_FRAMENUM, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_ieee802154_fcs,
|
|
{ "FCS", "wpan.fcs", FT_UINT16, BASE_HEX, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_ieee802154_rssi,
|
|
{ "RSSI", "wpan.rssi", FT_INT8, BASE_DEC, NULL, 0x0,
|
|
"Received Signal Strength", HFILL }},
|
|
|
|
{ &hf_ieee802154_fcs_ok,
|
|
{ "FCS Valid", "wpan.fcs_ok", FT_BOOLEAN, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_ieee802154_correlation,
|
|
{ "LQI Correlation Value", "wpan.correlation", FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
|
|
/* Command Frame Specific Fields */
|
|
/*--------------------------------*/
|
|
|
|
{ &hf_ieee802154_cmd_id,
|
|
{ "Command Identifier", "wpan.cmd", FT_UINT8, BASE_HEX, VALS(ieee802154_cmd_names), 0x0,
|
|
NULL, HFILL }},
|
|
|
|
/* Capability Information Fields */
|
|
{ &hf_ieee802154_cinfo_alt_coord,
|
|
{ "Alternate PAN Coordinator", "wpan.cinfo.alt_coord", FT_BOOLEAN, 8, NULL, IEEE802154_CMD_CINFO_ALT_PAN_COORD,
|
|
"Whether this device can act as a PAN coordinator or not.", HFILL }},
|
|
|
|
{ &hf_ieee802154_cinfo_device_type,
|
|
{ "Device Type", "wpan.cinfo.device_type", FT_BOOLEAN, 8, TFS(&tfs_cinfo_device_type), IEEE802154_CMD_CINFO_DEVICE_TYPE,
|
|
"Whether this device is RFD (reduced-function device) or FFD (full-function device).", HFILL }},
|
|
|
|
{ &hf_ieee802154_cinfo_power_src,
|
|
{ "Power Source", "wpan.cinfo.power_src", FT_BOOLEAN, 8, TFS(&tfs_cinfo_power_src), IEEE802154_CMD_CINFO_POWER_SRC,
|
|
"Whether this device is operating on AC/mains or battery power.", HFILL }},
|
|
|
|
{ &hf_ieee802154_cinfo_idle_rx,
|
|
{ "Receive On When Idle", "wpan.cinfo.idle_rx", FT_BOOLEAN, 8, NULL, IEEE802154_CMD_CINFO_IDLE_RX,
|
|
"Whether this device can receive packets while idle or not.", HFILL }},
|
|
|
|
{ &hf_ieee802154_cinfo_sec_capable,
|
|
{ "Security Capability", "wpan.cinfo.sec_capable", FT_BOOLEAN, 8, NULL, IEEE802154_CMD_CINFO_SEC_CAPABLE,
|
|
"Whether this device is capable of receiving encrypted packets.", HFILL }},
|
|
|
|
{ &hf_ieee802154_cinfo_alloc_addr,
|
|
{ "Allocate Address", "wpan.cinfo.alloc_addr", FT_BOOLEAN, 8, NULL, IEEE802154_CMD_CINFO_ALLOC_ADDR,
|
|
"Whether this device wishes to use a 16-bit short address instead of its IEEE 802.15.4 64-bit long address.", HFILL }},
|
|
|
|
/* Association response fields */
|
|
{ &hf_ieee802154_assoc_addr,
|
|
{ "Short Address", "wpan.asoc.addr", FT_UINT16, BASE_HEX, NULL, 0x0,
|
|
"The short address that the device should assume. An address of 0xfffe indicates that the device should use its IEEE 64-bit long address.", HFILL }},
|
|
|
|
{ &hf_ieee802154_assoc_status,
|
|
{ "Association Status", "wpan.assoc.status", FT_UINT8, BASE_HEX, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_ieee802154_disassoc_reason,
|
|
{ "Disassociation Reason", "wpan.disassoc.reason", FT_UINT8, BASE_HEX, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
|
|
/* Coordinator Realignment fields */
|
|
{ &hf_ieee802154_realign_pan,
|
|
{ "PAN ID", "wpan.realign.pan", FT_UINT16, BASE_HEX, NULL, 0x0,
|
|
"The PAN identifier the coordinator wishes to use for future communication.", HFILL }},
|
|
|
|
{ &hf_ieee802154_realign_caddr,
|
|
{ "Coordinator Short Address", "wpan.realign.addr", FT_UINT16, BASE_HEX, NULL, 0x0,
|
|
"The 16-bit address the coordinator wishes to use for future communication.", HFILL }},
|
|
|
|
{ &hf_ieee802154_realign_channel,
|
|
{ "Logical Channel", "wpan.realign.channel", FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
"The logical channel the coordinator wishes to use for future communication.", HFILL }},
|
|
|
|
{ &hf_ieee802154_realign_addr,
|
|
{ "Short Address", "wpan.realign.addr", FT_UINT16, BASE_HEX, NULL, 0x0,
|
|
"A short-address that the orphaned device shall assume if applicable.", HFILL }},
|
|
|
|
{ &hf_ieee802154_realign_channel_page,
|
|
{ "Channel Page", "wpan.realign.channel_page", FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
"The logical channel page the coordinator wishes to use for future communication.", HFILL }},
|
|
|
|
{ &hf_ieee802154_gtsreq_len,
|
|
{ "GTS Length", "wpan.gtsreq.length", FT_UINT8, BASE_DEC, NULL, IEEE802154_CMD_GTS_REQ_LEN,
|
|
"Number of superframe slots the device is requesting.", HFILL }},
|
|
|
|
{ &hf_ieee802154_gtsreq_dir,
|
|
{ "GTS Direction", "wpan.gtsreq.direction", FT_BOOLEAN, 8, TFS(&tfs_gtsreq_dir), IEEE802154_CMD_GTS_REQ_DIR,
|
|
"The direction of traffic in the guaranteed timeslot.", HFILL }},
|
|
|
|
{ &hf_ieee802154_gtsreq_type,
|
|
{ "Characteristic Type", "wpan.gtsreq.type", FT_BOOLEAN, 8, TFS(&tfs_gtsreq_type), IEEE802154_CMD_GTS_REQ_TYPE,
|
|
"Whether this request is to allocate or deallocate a timeslot.", HFILL }},
|
|
|
|
/* Beacon Frame Specific Fields */
|
|
/*-------------------------------*/
|
|
{ &hf_ieee802154_beacon_order,
|
|
{ "Beacon Interval", "wpan.beacon_order", FT_UINT16, BASE_DEC, NULL, IEEE802154_BEACON_ORDER_MASK,
|
|
"Specifies the transmission interval of the beacons.", HFILL }},
|
|
|
|
{ &hf_ieee802154_superframe_order,
|
|
{ "Superframe Interval", "wpan.superframe_order", FT_UINT16, BASE_DEC, NULL,
|
|
IEEE802154_SUPERFRAME_ORDER_MASK,
|
|
"Specifies the length of time the coordinator will interact with the PAN.", HFILL }},
|
|
|
|
{ &hf_ieee802154_cap,
|
|
{ "Final CAP Slot", "wpan.cap", FT_UINT16, BASE_DEC, NULL, IEEE802154_SUPERFRAME_CAP_MASK,
|
|
"Specifies the final superframe slot used by the CAP.", HFILL }},
|
|
|
|
{ &hf_ieee802154_superframe_battery_ext,
|
|
{ "Battery Extension", "wpan.battery_ext", FT_BOOLEAN, 16, NULL, IEEE802154_BATT_EXTENSION_MASK,
|
|
"Whether transmissions may not extend past the length of the beacon frame.", HFILL }},
|
|
|
|
{ &hf_ieee802154_superframe_coord,
|
|
{ "PAN Coordinator", "wpan.bcn_coord", FT_BOOLEAN, 16, NULL, IEEE802154_SUPERFRAME_COORD_MASK,
|
|
"Whether this beacon frame is being transmitted by the PAN coordinator or not.", HFILL }},
|
|
|
|
{ &hf_ieee802154_assoc_permit,
|
|
{ "Association Permit", "wpan.assoc_permit", FT_BOOLEAN, 16, NULL, IEEE802154_ASSOC_PERMIT_MASK,
|
|
"Whether this PAN is accepting association requests or not.", HFILL }},
|
|
|
|
{ &hf_ieee802154_gts_count,
|
|
{ "GTS Descriptor Count", "wpan.gts.count", FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
"The number of GTS descriptors present in this beacon frame.", HFILL }},
|
|
|
|
{ &hf_ieee802154_gts_permit,
|
|
{ "GTS Permit", "wpan.gts.permit", FT_BOOLEAN, BASE_NONE, NULL, 0x0,
|
|
"Whether the PAN coordinator is accepting GTS requests or not.", HFILL }},
|
|
|
|
{ &hf_ieee802154_gts_direction,
|
|
{ "Direction", "wpan.gts.direction", FT_BOOLEAN, BASE_NONE, TFS(&ieee802154_gts_direction_tfs), 0x0,
|
|
"A flag defining the direction of the GTS Slot.", HFILL }},
|
|
|
|
{ &hf_ieee802154_gts_address,
|
|
{ "Address", "wpan.gts.address", FT_UINT16, BASE_HEX, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_ieee802154_pending16,
|
|
{ "Address", "wpan.pending16", FT_UINT16, BASE_HEX, NULL, 0x0,
|
|
"Device with pending data to receive.", HFILL }},
|
|
|
|
{ &hf_ieee802154_pending64,
|
|
{ "Address", "wpan.pending64", FT_EUI64, BASE_NONE, NULL, 0x0,
|
|
"Device with pending data to receive.", HFILL }},
|
|
|
|
/* Auxiliary Security Header Fields */
|
|
/*----------------------------------*/
|
|
{ &hf_ieee802154_security_level,
|
|
{ "Security Level", "wpan.aux_sec.sec_level", FT_UINT8, BASE_HEX, VALS(ieee802154_sec_level_names),
|
|
IEEE802154_AUX_SEC_LEVEL_MASK, "The Security Level of the frame", HFILL }},
|
|
|
|
{ &hf_ieee802154_security_control_field,
|
|
{ "Security Control Field", "wpan.aux_sec.security_control_field", FT_UINT8, BASE_HEX, NULL,
|
|
0x0, NULL, HFILL }},
|
|
|
|
{ &hf_ieee802154_key_id_mode,
|
|
{ "Key Identifier Mode", "wpan.aux_sec.key_id_mode", FT_UINT8, BASE_HEX, VALS(ieee802154_key_id_mode_names),
|
|
IEEE802154_AUX_KEY_ID_MODE_MASK,
|
|
"The scheme to use by the recipient to lookup the key in its key table", HFILL }},
|
|
|
|
{ &hf_ieee802154_aux_sec_reserved,
|
|
{ "Reserved", "wpan.aux_sec.reserved", FT_UINT8, BASE_HEX, NULL, IEEE802154_AUX_KEY_RESERVED_MASK,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_ieee802154_aux_sec_frame_counter,
|
|
{ "Frame Counter", "wpan.aux_sec.frame_counter", FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
"Frame counter of the originator of the protected frame", HFILL }},
|
|
|
|
{ &hf_ieee802154_aux_sec_key_source,
|
|
{ "Key Source", "wpan.aux_sec.key_source", FT_UINT64, BASE_HEX, NULL, 0x0,
|
|
"Key Source for processing of the protected frame", HFILL }},
|
|
|
|
{ &hf_ieee802154_aux_sec_key_index,
|
|
{ "Key Index", "wpan.aux_sec.key_index", FT_UINT8, BASE_HEX, NULL, 0x0,
|
|
"Key Index for processing of the protected frame", HFILL }},
|
|
|
|
/* IEEE 802.15.4-2003 Security Header Fields */
|
|
{ &hf_ieee802154_sec_frame_counter,
|
|
{ "Frame Counter", "wpan.sec_frame_counter", FT_UINT32, BASE_HEX, NULL, 0x0,
|
|
"Frame counter of the originator of the protected frame (802.15.4-2003)", HFILL }},
|
|
|
|
{ &hf_ieee802154_sec_key_sequence_counter,
|
|
{ "Key Sequence Counter", "wpan.sec_key_sequence_counter", FT_UINT8, BASE_HEX, NULL, 0x0,
|
|
"Key Sequence counter of the originator of the protected frame (802.15.4-2003)", HFILL }}
|
|
};
|
|
|
|
/* Subtrees */
|
|
static gint *ett[] = {
|
|
&ett_ieee802154_nonask_phy,
|
|
&ett_ieee802154_nonask_phy_phr,
|
|
&ett_ieee802154,
|
|
&ett_ieee802154_fcf,
|
|
&ett_ieee802154_auxiliary_security,
|
|
&ett_ieee802154_aux_sec_control,
|
|
&ett_ieee802154_aux_sec_key_id,
|
|
&ett_ieee802154_fcs,
|
|
&ett_ieee802154_cmd,
|
|
&ett_ieee802154_superframe,
|
|
&ett_ieee802154_gts,
|
|
&ett_ieee802154_gts_direction,
|
|
&ett_ieee802154_gts_descriptors,
|
|
&ett_ieee802154_pendaddr
|
|
};
|
|
|
|
static ei_register_info ei[] = {
|
|
{ &ei_ieee802154_invalid_addressing, { "wpan.invalid_addressing", PI_MALFORMED, PI_WARN, "Invalid Addressing", EXPFILL }},
|
|
{ &ei_ieee802154_dst, { "wpan.dst_invalid", PI_MALFORMED, PI_ERROR, "Invalid Destination Address Mode", EXPFILL }},
|
|
{ &ei_ieee802154_src, { "wpan.src_invalid", PI_MALFORMED, PI_ERROR, "Invalid Source Address Mode", EXPFILL }},
|
|
{ &ei_ieee802154_decrypt_error, { "wpan.decrypt_error", PI_UNDECODED, PI_WARN, "Decryption error", EXPFILL }},
|
|
{ &ei_ieee802154_fcs, { "wpan.fcs.bad", PI_CHECKSUM, PI_WARN, "Bad FCS", EXPFILL }},
|
|
};
|
|
|
|
/* Preferences. */
|
|
module_t *ieee802154_module;
|
|
expert_module_t* expert_ieee802154;
|
|
|
|
static uat_field_t addr_uat_flds[] = {
|
|
UAT_FLD_HEX(addr_uat,addr16,"Short Address",
|
|
"16-bit short address in hexadecimal."),
|
|
UAT_FLD_HEX(addr_uat,pan,"PAN Identifier",
|
|
"16-bit PAN identifier in hexadecimal."),
|
|
UAT_FLD_BUFFER(addr_uat,eui64,"EUI-64",
|
|
"64-bit extended unique identifier."),
|
|
UAT_END_FIELDS
|
|
};
|
|
|
|
static build_valid_func ieee802154_da_build_value[1] = {ieee802154_da_value};
|
|
static decode_as_value_t ieee802154_da_values = {ieee802154_da_prompt, 1, ieee802154_da_build_value};
|
|
static decode_as_t ieee802154_da = {
|
|
IEEE802154_PROTOABBREV_WPAN, "PAN", IEEE802154_PROTOABBREV_WPAN_PANID,
|
|
1, 0, &ieee802154_da_values, NULL, NULL,
|
|
decode_as_default_populate_list, decode_as_default_reset, decode_as_default_change, NULL
|
|
};
|
|
|
|
/* Register the init routine. */
|
|
register_init_routine(proto_init_ieee802154);
|
|
|
|
/* Register Protocol name and description. */
|
|
proto_ieee802154 = proto_register_protocol("IEEE 802.15.4 Low-Rate Wireless PAN", "IEEE 802.15.4",
|
|
IEEE802154_PROTOABBREV_WPAN);
|
|
proto_ieee802154_nonask_phy = proto_register_protocol("IEEE 802.15.4 Low-Rate Wireless PAN non-ASK PHY",
|
|
"IEEE 802.15.4 non-ASK PHY", "wpan-nonask-phy");
|
|
|
|
/* Register header fields and subtrees. */
|
|
proto_register_field_array(proto_ieee802154, hf, array_length(hf));
|
|
proto_register_field_array(proto_ieee802154, hf_phy, array_length(hf_phy));
|
|
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
|
|
expert_ieee802154 = expert_register_protocol(proto_ieee802154);
|
|
expert_register_field_array(expert_ieee802154, ei, array_length(ei));
|
|
|
|
ieee802_15_4_short_address_type = address_type_dissector_register("AT_IEEE_802_15_4_SHORT", "IEEE 802.15.4 16-bit short address",
|
|
ieee802_15_4_short_address_to_str, ieee802_15_4_short_address_str_len, NULL, ieee802_15_4_short_address_len, NULL, NULL);
|
|
|
|
/* add a user preference to set the 802.15.4 ethertype */
|
|
ieee802154_module = prefs_register_protocol(proto_ieee802154,
|
|
proto_reg_handoff_ieee802154);
|
|
prefs_register_uint_preference(ieee802154_module, "802154_ethertype",
|
|
"802.15.4 Ethertype (in hex)",
|
|
"(Hexadecimal) Ethertype used to indicate IEEE 802.15.4 frame.",
|
|
16, &ieee802154_ethertype);
|
|
prefs_register_bool_preference(ieee802154_module, "802154_cc24xx",
|
|
"TI CC24xx FCS format",
|
|
"Set if the FCS field is in TI CC24xx format.",
|
|
&ieee802154_cc24xx);
|
|
prefs_register_bool_preference(ieee802154_module, "802154_fcs_ok",
|
|
"Dissect only good FCS",
|
|
"Dissect payload only if FCS is valid.",
|
|
&ieee802154_fcs_ok);
|
|
|
|
/* Create a UAT for static address mappings. */
|
|
static_addr_uat = uat_new("Static Addresses",
|
|
sizeof(static_addr_t), /* record size */
|
|
"802154_addresses", /* filename */
|
|
TRUE, /* from_profile */
|
|
&static_addrs, /* data_ptr */
|
|
&num_static_addrs, /* numitems_ptr */
|
|
UAT_AFFECTS_DISSECTION, /* affects dissection of packets, but not set of named fields */
|
|
NULL, /* help */
|
|
NULL, /* copy callback */
|
|
addr_uat_update_cb, /* update callback */
|
|
NULL, /* free callback */
|
|
NULL, /* post update callback */
|
|
addr_uat_flds); /* UAT field definitions */
|
|
prefs_register_uat_preference(ieee802154_module, "static_addr",
|
|
"Static Addresses",
|
|
"A table of static address mappings between 16-bit short addressing and EUI-64 addresses",
|
|
static_addr_uat);
|
|
|
|
/* Register preferences for a decryption key */
|
|
/* TODO: Implement a UAT for multiple keys, and with more advanced key management. */
|
|
prefs_register_string_preference(ieee802154_module, "802154_key", "Decryption key",
|
|
"128-bit decryption key in hexadecimal format", (const char **)&ieee802154_key_str);
|
|
|
|
prefs_register_enum_preference(ieee802154_module, "802154_sec_suite",
|
|
"Security Suite (802.15.4-2003)",
|
|
"Specifies the security suite to use for 802.15.4-2003 secured frames"
|
|
" (only supported suites are listed). Option ignored for 802.15.4-2006"
|
|
" and unsecured frames.",
|
|
&ieee802154_sec_suite, ieee802154_2003_sec_suite_enums, FALSE);
|
|
|
|
prefs_register_bool_preference(ieee802154_module, "802154_extend_auth",
|
|
"Extend authentication data (802.15.4-2003)",
|
|
"Set if the manufacturer extends the authentication data with the"
|
|
" security header. Option ignored for 802.15.4-2006 and unsecured frames.",
|
|
&ieee802154_extend_auth);
|
|
|
|
/* Register the subdissector list */
|
|
panid_dissector_table = register_dissector_table(IEEE802154_PROTOABBREV_WPAN_PANID, "IEEE 802.15.4 PANID", FT_UINT16, BASE_HEX);
|
|
ieee802154_heur_subdissector_list = register_heur_dissector_list(IEEE802154_PROTOABBREV_WPAN);
|
|
ieee802154_beacon_subdissector_list = register_heur_dissector_list(IEEE802154_PROTOABBREV_WPAN_BEACON);
|
|
|
|
/* Register dissectors with Wireshark. */
|
|
register_dissector(IEEE802154_PROTOABBREV_WPAN, dissect_ieee802154, proto_ieee802154);
|
|
register_dissector("wpan_nofcs", dissect_ieee802154_nofcs, proto_ieee802154);
|
|
register_dissector("wpan_cc24xx", dissect_ieee802154_cc24xx, proto_ieee802154);
|
|
register_dissector("wpan-nonask-phy", dissect_ieee802154_nonask_phy, proto_ieee802154_nonask_phy);
|
|
|
|
/* Register a Decode-As handler. */
|
|
register_decode_as(&ieee802154_da);
|
|
} /* proto_register_ieee802154 */
|
|
|
|
|
|
/*FUNCTION:------------------------------------------------------
|
|
* NAME
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* proto_reg_handoff_ieee802154
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* DESCRIPTION
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* Registers the IEEE 802.15.4 dissector with Wireshark.
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* Will be called every time 'apply' is pressed in the preferences menu.
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* as well as during Wireshark initialization
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* PARAMETERS
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* none
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* RETURNS
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* void
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*---------------------------------------------------------------
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*/
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void proto_reg_handoff_ieee802154(void)
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{
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static gboolean prefs_initialized = FALSE;
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static dissector_handle_t ieee802154_handle;
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static dissector_handle_t ieee802154_nonask_phy_handle;
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static dissector_handle_t ieee802154_nofcs_handle;
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static unsigned int old_ieee802154_ethertype;
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GByteArray *bytes;
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gboolean res;
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if (!prefs_initialized){
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/* Get the dissector handles. */
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ieee802154_handle = find_dissector(IEEE802154_PROTOABBREV_WPAN);
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ieee802154_nonask_phy_handle = find_dissector("wpan-nonask-phy");
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ieee802154_nofcs_handle = find_dissector("wpan_nofcs");
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data_handle = find_dissector("data");
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dissector_add_uint("wtap_encap", WTAP_ENCAP_IEEE802_15_4, ieee802154_handle);
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dissector_add_uint("wtap_encap", WTAP_ENCAP_IEEE802_15_4_NONASK_PHY, ieee802154_nonask_phy_handle);
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dissector_add_uint("wtap_encap", WTAP_ENCAP_IEEE802_15_4_NOFCS, ieee802154_nofcs_handle);
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dissector_add_uint("sll.ltype", LINUX_SLL_P_IEEE802154, ieee802154_handle);
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prefs_initialized = TRUE;
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} else {
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dissector_delete_uint("ethertype", old_ieee802154_ethertype, ieee802154_handle);
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}
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old_ieee802154_ethertype = ieee802154_ethertype;
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/* Get the IEEE 802.15.4 decryption key. */
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bytes = g_byte_array_new();
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res = hex_str_to_bytes(ieee802154_key_str, bytes, FALSE);
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ieee802154_key_valid = (res && bytes->len >= IEEE802154_CIPHER_SIZE);
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if (ieee802154_key_valid) {
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memcpy(ieee802154_key, bytes->data, IEEE802154_CIPHER_SIZE);
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}
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g_byte_array_free(bytes, TRUE);
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/* Register dissector handles. */
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dissector_add_uint("ethertype", ieee802154_ethertype, ieee802154_handle);
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} /* proto_reg_handoff_ieee802154 */
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/*
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* Editor modelines - http://www.wireshark.org/tools/modelines.html
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*
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* Local variables:
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* c-basic-offset: 4
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* tab-width: 8
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* indent-tabs-mode: nil
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* End:
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*
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* vi: set shiftwidth=4 tabstop=8 expandtab:
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* :indentSize=4:tabSize=8:noTabs=true:
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*/
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