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packet-ieee802154.c
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/* packet-ieee802154.c
*
* Auxiliary Security Header support and
* option to force TI CC24xx FCS format
* By Jean-Francois Wauthy <[email protected]>
* Copyright 2009 The University of Namur, Belgium
*
* IEEE 802.15.4 Dissectors for Wireshark
* By Owen Kirby <[email protected]>
* Copyright 2007 Exegin Technologies Limited
*
* IEEE 802.15.4 - TSCH options implemented
* By Jonathan Munoz <[email protected]>
*
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <[email protected]>
* Copyright 1998 Gerald Combs
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*------------------------------------------------------------
*
* In IEEE 802.15.4 packets, all fields are little endian. And
* Each byte is transmitted least significant bit first (reflected
* bit ordering).
*------------------------------------------------------------
*
* IEEE 802.15.4 Packets have the following format:
* | FCF |Seq No| Addressing | Data | FCS |
* |2 bytes|1 byte|0 to 20 bytes|Length-(Overhead) bytes|2 Bytes|
*------------------------------------------------------------
*
* CRC16 is calculated using the x^16 + x^12 + x^5 + 1 polynomial
* as specified by ITU-T, and is calculated over the IEEE 802.15.4
* packet (excluding the FCS) as transmitted over the air. Note,
* that because the least significan bits are transmitted first, this
* will require reversing the bit-order in each byte. Also, unlike
* most CRC algorithms, IEEE 802.15.4 uses an initial and final value
* of 0x0000, instead of 0xffff (which is used by the CCITT).
*------------------------------------------------------------
*
* This dissector supports both link-layer IEEE 802.15.4 captures
* and IEEE 802.15.4 packets encapsulated within other layers.
* Additionally, support has been provided for various formats
* of the frame check sequence:
* - IEEE 802.15.4 compliant FCS.
* - ChipCon/Texas Instruments CC24xx style FCS.
*------------------------------------------------------------
*/
/* Include files */
#include "config.h"
#include <epan/packet.h>
#include <epan/decode_as.h>
#include <epan/exceptions.h>
#include <epan/crc16-tvb.h>
#include <epan/expert.h>
#include <epan/addr_resolv.h>
#include <epan/address_types.h>
#include <epan/prefs.h>
#include <epan/uat.h>
#include <epan/strutil.h>
#include <epan/to_str-int.h>
#include <epan/show_exception.h>
#include <wsutil/pint.h>
/* Use libgcrypt for cipher libraries. */
#ifdef HAVE_LIBGCRYPT
#include <wsutil/wsgcrypt.h>
#endif /* HAVE_LIBGCRYPT */
#include "packet-ieee802154.h"
#include "packet-sll.h"
void proto_register_ieee802154(void);
void proto_reg_handoff_ieee802154(void);
/* Dissection Options for dissect_ieee802154_common */
#define DISSECT_IEEE802154_OPTION_CC24xx 0x00000001 /* FCS field contains a TI CC24xx style FCS. */
#define DISSECT_IEEE802154_OPTION_LINUX 0x00000002 /* Addressing fields are padded DLT_IEEE802_15_4_LINUX, not implemented. */
/* ethertype for 802.15.4 tag - encapsulating an Ethernet packet */
static unsigned int ieee802154_ethertype = 0x809A;
/* boolean value set if the FCS field is using the TI CC24xx format */
static gboolean ieee802154_cc24xx = FALSE;
/* boolean value set if the FCS must be ok before payload is dissected */
static gboolean ieee802154_fcs_ok = TRUE;
/* User string with the decryption key. */
static const gchar *ieee802154_key_str = NULL;
static gboolean ieee802154_key_valid;
static guint8 ieee802154_key[IEEE802154_CIPHER_SIZE];
static const char *ieee802154_user = "User";
/*-------------------------------------
* Address Hash Tables
*-------------------------------------
*/
static ieee802154_map_tab_t ieee802154_map = { NULL, NULL };
/*-------------------------------------
* Static Address Mapping UAT
*-------------------------------------
*/
/* UAT entry structure. */
typedef struct {
guchar *eui64;
guint eui64_len;
guint addr16;
guint pan;
} static_addr_t;
/* UAT variables */
static uat_t *static_addr_uat = NULL;
static static_addr_t *static_addrs = NULL;
static guint num_static_addrs = 0;
/* Sanity-checks a UAT record. */
static gboolean
addr_uat_update_cb(void *r, char **err)
{
static_addr_t *map = (static_addr_t *)r;
/* Ensure a valid short address */
if (map->addr16 >= IEEE802154_NO_ADDR16) {
*err = g_strdup("Invalid short address");
return FALSE;
}
/* Ensure a valid PAN identifier. */
if (map->pan >= IEEE802154_BCAST_PAN) {
*err = g_strdup("Invalid PAN identifier");
return FALSE;
}
/* Ensure a valid EUI-64 length */
if (map->eui64_len != sizeof(guint64)) {
*err = g_strdup("Invalid EUI-64 length");
return FALSE;
}
return TRUE;
} /* ieee802154_addr_uat_update_cb */
/* Field callbacks. */
UAT_HEX_CB_DEF(addr_uat, addr16, static_addr_t)
UAT_HEX_CB_DEF(addr_uat, pan, static_addr_t)
UAT_BUFFER_CB_DEF(addr_uat, eui64, static_addr_t, eui64, eui64_len)
/*-------------------------------------
* Dissector Function Prototypes
*-------------------------------------
*/
/* Dissection Routines. */
static void dissect_ieee802154_nonask_phy (tvbuff_t *, packet_info *, proto_tree *);
static void dissect_ieee802154 (tvbuff_t *, packet_info *, proto_tree *);
static void dissect_ieee802154_nofcs (tvbuff_t *, packet_info *, proto_tree *);
static void dissect_ieee802154_cc24xx (tvbuff_t *, packet_info *, proto_tree *);
/*static void dissect_ieee802154_linux (tvbuff_t *, packet_info *, proto_tree *); TODO: Implement Me. */
static void dissect_ieee802154_common (tvbuff_t *, packet_info *, proto_tree *, guint);
/* Sub-dissector helpers. */
static void dissect_ieee802154_fcf (tvbuff_t *, packet_info *, proto_tree *, ieee802154_packet *, guint *);
static void dissect_ieee802154_superframe (tvbuff_t *, packet_info *, proto_tree *, guint *);
static void dissect_ieee802154_gtsinfo (tvbuff_t *, packet_info *, proto_tree *, guint *);
static void dissect_ieee802154_pendaddr (tvbuff_t *, packet_info *, proto_tree *, guint *);
static void dissect_ieee802154_command (tvbuff_t *, packet_info *, proto_tree *, ieee802154_packet *);
static void dissect_ieee802154_assoc_req (tvbuff_t *, packet_info *, proto_tree *, ieee802154_packet *);
static void dissect_ieee802154_assoc_rsp (tvbuff_t *, packet_info *, proto_tree *, ieee802154_packet *);
static void dissect_ieee802154_disassoc (tvbuff_t *, packet_info *, proto_tree *, ieee802154_packet *);
static void dissect_ieee802154_realign (tvbuff_t *, packet_info *, proto_tree *, ieee802154_packet *);
static void dissect_ieee802154_gtsreq (tvbuff_t *, packet_info *, proto_tree *, ieee802154_packet *);
/* Dissector for the Infomation Elements */
static void dissect_ieee802154_h_inf_elem (tvbuff_t *, packet_info *, proto_tree *, ieee802154_packet *, guint *);
static void dissect_ieee802154_p_inf_elem (tvbuff_t *, packet_info *, proto_tree *, ieee802154_packet *, guint *);
static void dissect_ieee802154_p_inf_elem_mlme (tvbuff_t *, packet_info *, proto_tree *, ieee802154_packet *, guint *);
/* Get the size of the MAC HEADER */
int size_header (ieee802154_packet *packet);
/* Decryption helpers. */
typedef enum {
DECRYPT_PACKET_SUCCEEDED,
DECRYPT_NOT_ENCRYPTED,
DECRYPT_VERSION_UNSUPPORTED,
DECRYPT_PACKET_TOO_SMALL,
DECRYPT_PACKET_NO_EXT_SRC_ADDR,
DECRYPT_PACKET_NO_KEY,
DECRYPT_PACKET_DECRYPT_FAILED,
DECRYPT_PACKET_MIC_CHECK_FAILED
} ws_decrypt_status;
static tvbuff_t *dissect_ieee802154_decrypt(tvbuff_t *, guint, packet_info *, ieee802154_packet *,
ws_decrypt_status *);
static void ccm_init_block (gchar *, gboolean, gint, guint64, ieee802154_packet *, gint);
static gboolean ccm_ctr_encrypt (const gchar *, const gchar *, gchar *, gchar *, gint);
static gboolean ccm_cbc_mac (const gchar *, const gchar *, const gchar *, gint, const gchar *, gint, gchar *);
/* Initialize Protocol and Registered fields */
static int proto_ieee802154_nonask_phy = -1;
static int hf_ieee802154_nonask_phy_preamble = -1;
static int hf_ieee802154_nonask_phy_sfd = -1;
static int hf_ieee802154_nonask_phy_length = -1;
static int hf_ieee802154_nonask_phr = -1;
static int proto_ieee802154 = -1;
static int hf_ieee802154_frame_length = -1;
static int hf_ieee802154_fcf = -1;
static int hf_ieee802154_frame_type = -1;
static int hf_ieee802154_security = -1;
static int hf_ieee802154_pending = -1;
static int hf_ieee802154_ack_request = -1;
static int hf_ieee802154_intra_pan = -1;
static int hf_ieee802154_seqno = -1;
static int hf_ieee802154_seqnr_supression = -1;
static int hf_ieee802154_ielist_present = -1;
static int hf_ieee802154_src_addr_mode = -1;
static int hf_ieee802154_dst_addr_mode = -1;
static int hf_ieee802154_version = -1;
static int hf_ieee802154_dst_panID = -1;
static int hf_ieee802154_dst16 = -1;
static int hf_ieee802154_dst64 = -1;
static int hf_ieee802154_src_panID = -1;
static int hf_ieee802154_src16 = -1;
static int hf_ieee802154_src64 = -1;
static int hf_ieee802154_src64_origin = -1;
static int hf_ieee802154_fcs = -1;
static int hf_ieee802154_rssi = -1;
static int hf_ieee802154_fcs_ok = -1;
static int hf_ieee802154_correlation = -1;
/* Registered fields for Command Packets */
static int hf_ieee802154_cmd_id = -1;
static int hf_ieee802154_cinfo_alt_coord = -1;
static int hf_ieee802154_cinfo_device_type = -1;
static int hf_ieee802154_cinfo_power_src = -1;
static int hf_ieee802154_cinfo_idle_rx = -1;
static int hf_ieee802154_cinfo_sec_capable = -1;
static int hf_ieee802154_cinfo_alloc_addr = -1;
static int hf_ieee802154_assoc_addr = -1;
static int hf_ieee802154_assoc_status = -1;
static int hf_ieee802154_disassoc_reason = -1;
static int hf_ieee802154_realign_pan = -1;
static int hf_ieee802154_realign_caddr = -1;
static int hf_ieee802154_realign_channel = -1;
static int hf_ieee802154_realign_addr = -1;
static int hf_ieee802154_realign_channel_page = -1;
static int hf_ieee802154_gtsreq_len = -1;
static int hf_ieee802154_gtsreq_dir = -1;
static int hf_ieee802154_gtsreq_type = -1;
/* Registered fields for Beacon Packets */
static int hf_ieee802154_beacon_order = -1;
static int hf_ieee802154_superframe_order = -1;
static int hf_ieee802154_cap = -1;
static int hf_ieee802154_superframe_battery_ext = -1;
static int hf_ieee802154_superframe_coord = -1;
static int hf_ieee802154_assoc_permit = -1;
static int hf_ieee802154_gts_count = -1;
static int hf_ieee802154_gts_permit = -1;
static int hf_ieee802154_gts_direction = -1;
static int hf_ieee802154_gts_address = -1;
static int hf_ieee802154_pending16 = -1;
static int hf_ieee802154_pending64 = -1;
/* Registered fields for Auxiliary Security Header */
static int hf_ieee802154_security_control_field = -1;
static int hf_ieee802154_security_level = -1;
static int hf_ieee802154_key_id_mode = -1;
static int hf_ieee802154_aux_sec_reserved = -1;
static int hf_ieee802154_aux_sec_frame_counter = -1;
static int hf_ieee802154_aux_sec_key_source = -1;
static int hf_ieee802154_aux_sec_key_index = -1;
/* 802.15.4-2003 security */
static int hf_ieee802154_sec_frame_counter = -1;
static int hf_ieee802154_sec_key_sequence_counter = -1;
/* Initialize Subtree Pointers */
static gint ett_ieee802154_nonask_phy = -1;
static gint ett_ieee802154_nonask_phy_phr = -1;
static gint ett_ieee802154 = -1;
static gint ett_ieee802154_fcf = -1;
static gint ett_ieee802154_auxiliary_security = -1;
static gint ett_ieee802154_aux_sec_control = -1;
static gint ett_ieee802154_aux_sec_key_id = -1;
static gint ett_ieee802154_fcs = -1;
static gint ett_ieee802154_cmd = -1;
static gint ett_ieee802154_superframe = -1;
static gint ett_ieee802154_gts = -1;
static gint ett_ieee802154_gts_direction = -1;
static gint ett_ieee802154_gts_descriptors = -1;
static gint ett_ieee802154_pendaddr = -1;
static gint ett_ieee802154_h_ie = -1;
static gint ett_ieee802154_p_ie = -1;
static gint ett_ieee802154_mlme_sh_p_ie = -1;
static gint ett_ieee802154_mlme_lg_p_ie = -1;
static expert_field ei_ieee802154_invalid_addressing = EI_INIT;
static expert_field ei_ieee802154_fcs = EI_INIT;
static expert_field ei_ieee802154_decrypt_error = EI_INIT;
static expert_field ei_ieee802154_dst = EI_INIT;
static expert_field ei_ieee802154_src = EI_INIT;
static int ieee802_15_4_short_address_type = -1;
/* Header Information Elements header's values */
static int hf_ieee802154_h_ie_content_lenght = -1;
static int hf_ieee802154_h_ie_id = -1;
static int hf_ieee802154_h_ie_type = -1;
/* Payload Information Elements header's values */
static int hf_ieee802154_p_ie_content_lenght = -1;
static int hf_ieee802154_p_ie_id = -1;
static int hf_ieee802154_p_ie_type = -1;
/* Payload MLME Information Elements header's values */
static int hf_ieee802154_p_ie_mlme_sh_lenght = -1;
static int hf_ieee802154_p_ie_mlme_sh_id = -1;
static int hf_ieee802154_p_ie_mlme_type = -1;
static int hf_ieee802154_p_ie_mlme_lg_lenght = -1;
static int hf_ieee802154_p_ie_mlme_lg_id = -1;
/*
* Dissector handles
* - beacon dissection is always heuristic.
* - the PANID table is for stateful dissectors only (ie: Decode-As)
* - otherwise, data dissectors fall back to the heuristic dissectors.
*/
static dissector_handle_t data_handle;
static dissector_table_t panid_dissector_table;
static heur_dissector_list_t ieee802154_beacon_subdissector_list;
static heur_dissector_list_t ieee802154_heur_subdissector_list;
/* Name Strings */
static const value_string ieee802154_frame_types[] = {
{ IEEE802154_FCF_BEACON, "Beacon" },
{ IEEE802154_FCF_DATA, "Data" },
{ IEEE802154_FCF_ACK, "Ack" },
{ IEEE802154_FCF_CMD, "Command" },
{ IEEE802154_FCF_RESERVED, "Reserved" }, /* according to 2015 spec. */
{ IEEE802154_FCF_MULTIPURPOSE, "Multipurpose" }, /* according to 2015 spec. */
{ IEEE802154_FCF_FRAGMENT_FRAG, "Fragment or Frak" }, /* according to 2015 spec. */
{ IEEE802154_FCF_EXTENDED, "Extended" }, /* according to 2015 spec. */
{ 0, NULL }
};
static const value_string ieee802154_addr_modes[] = {
{ IEEE802154_FCF_ADDR_NONE, "None" },
{ IEEE802154_FCF_ADDR_SHORT,"Short/16-bit" },
{ IEEE802154_FCF_ADDR_EXT, "Long/64-bit" },
{ 0, NULL }
};
static const value_string ieee802154_cmd_names[] = {
{ IEEE802154_CMD_ASRQ, "Association Request" },
{ IEEE802154_CMD_ASRSP, "Association Response" },
{ IEEE802154_CMD_DISAS, "Disassociation Notification" },
{ IEEE802154_CMD_DATA_RQ, "Data Request" },
{ IEEE802154_CMD_PANID_ERR, "PAN ID Conflict" },
{ IEEE802154_CMD_ORPH_NOTIF,"Orphan Notification" },
{ IEEE802154_CMD_BCN_RQ, "Beacon Request" },
{ IEEE802154_CMD_COORD_REAL,"Coordinator Realignment" },
{ IEEE802154_CMD_GTS_REQ, "GTS Request" },
{ 0, NULL }
};
static const value_string ieee802154_sec_level_names[] = {
{ SECURITY_LEVEL_NONE, "No Security" },
{ SECURITY_LEVEL_MIC_32, "32-bit Message Integrity Code" },
{ SECURITY_LEVEL_MIC_64, "64-bit Message Integrity Code" },
{ SECURITY_LEVEL_MIC_128, "128-bit Message Integrity Code" },
{ SECURITY_LEVEL_ENC, "Encryption" },
{ SECURITY_LEVEL_ENC_MIC_32, "Encryption with 32-bit Message Integrity Code" },
{ SECURITY_LEVEL_ENC_MIC_64, "Encryption with 64-bit Message Integrity Code" },
{ SECURITY_LEVEL_ENC_MIC_128, "Encryption with 128-bit Message Integrity Code" },
{ 0, NULL }
};
static const value_string ieee802154_key_id_mode_names[] = {
{ KEY_ID_MODE_IMPLICIT, "Implicit Key" },
{ KEY_ID_MODE_KEY_INDEX, "Indexed Key using the Default Key Source" },
{ KEY_ID_MODE_KEY_EXPLICIT_4, "Explicit Key with 4-octet Key Source" },
{ KEY_ID_MODE_KEY_EXPLICIT_8, "Explicit Key with 8-octet Key Source" },
{ 0, NULL }
};
/* according to 2015 spec. */
static const value_string ieee802154_h_information_elements[] = {
{ IEEE802154_H_IE_DA_IE_VENDOR_SPECIFIC_HEADER, "DA IE Vendor Specific Header IE" },
{ IEEE802154_H_IE_DA, "DA IE" },
{ IEEE802154_H_IE_CSL, "CSL IE" },
{ IEEE802154_H_IE_RIT, "RIT IE" },
{ IEEE802154_H_IE_DSME_PAN_DESC, "DSME PAN descriptor IE" },
{ IEEE802154_H_IE_RDV_TIME, "Rendezvous Time IE" },
{ IEEE802154_H_IE_TIME_CORRECTION, "Time Correction IE" },
{ IEEE802154_H_IE_EXT_DSME_PAN_DESC, "Extended DSME PAN descriptor IE" },
{ IEEE802154_H_IE_FSCD, "Fragment Sequence Context Description (FSCD) IE" },
{ IEEE802154_H_IE_SIMPL_SF_SPEC, "Simplified Superframe Specification IE" },
{ IEEE802154_H_IE_SIMPL_GTS, "Simplified GTS Specification IE" },
{ IEEE802154_H_IE_LECIM_CAPAB, "LECIM Capabilities IE" },
{ IEEE802154_H_IE_TRLE_DESC, "TRLE Descriptor" },
{ IEEE802154_H_IE_RCC_CAPAB, "RCC Capabilities IE" },
{ IEEE802154_H_IE_RCCN_DESC, "RCCN Descriptor IE"},
{ IEEE802154_H_IE_GLOBAL_TIME, "Global Time IE" },
{ IEEE802154_H_IE_HDR_TERM_1, "Header Termination 1 IE" },
{ IEEE802154_H_IE_HDR_TERM_2, "Header Termination 2 IE" },
{ 0, NULL }
};
static const value_string ieee802154_h_mlme_sub_short_information_elements[] = {
{ IEEE802154_P_IE_TSCH_SYNC_SH, "TSCH Synchronization IE" },
{ IEEE802154_P_IE_TSCH_SLOTFR_LINK_SH, "TSCH Slotframe and Link IE" },
{ IEEE802154_P_IE_TSCH_TIMESLOT_SH, "TSCH Timeslot IE" },
{ IEEE802154_P_IE_HOPPING_TIMING_SH, "Hopping timing IE" },
{ IEEE802154_P_IE_ENHACED_BEACON_FILTER_SH, "Enhaced Beacon Filter IE" },
{ IEEE802154_P_IE_MAC_METRICS_SH, "MAC Metrics" },
{ IEEE802154_P_IE_ALL_MAC_METRICS_SH, "All MAC Metrics IE" },
{ IEEE802154_P_IE_COEXISTENCE_SPEC_SH, "Coexistence Specification IE" },
{ IEEE802154_P_IE_SUN_DEVICE_CAPABILITIES_SH, "SUN Device Capabilities IE" },
{ IEEE802154_P_IE_SUN_FSK_GEN_PHY_SH, "SUN FSK Generic PHY IE" },
{ IEEE802154_P_IE_MODE_SWITCH_PARAMETER_SH, "Mode Switch Parameter IE" },
{ IEEE802154_P_IE_PHY_PARAMETER_CHANGE_SH, "PHY Parameter Change IE" },
{ IEEE802154_P_IE_O_QPSK_PHY_MODE_SH, "O-QPSY PHY Mode IE" },
{ IEEE802154_P_IE_PCA_ALLOCATION_SH, "PCA Allocation IE" },
{ IEEE802154_P_IE_DSSS_OPER_MODE_SH, "DSSS Operating Mode IE"},
{ IEEE802154_P_IE_FSK_OPER_MODE_SH, "FSK Operating Mode IE" },
{ IEEE802154_P_IE_TVWS_PHY_OPE_MODE_SH, "TVWS PHY Operating Mode Description IE" },
{ IEEE802154_P_IE_TVWS_DEVICE_CAPAB_SH, "TVWS Device Capabilities IE" },
{ IEEE802154_P_IE_TVWS_DEVICE_CATEG_SH, "TVWS Device Category IE" },
{ IEEE802154_P_IE_TVWS_DEVICE_IDENTIF_SH, "TVWS Device Identification IE" },
{ IEEE802154_P_IE_TVWS_DEVICE_LOCATION_SH, "TVWS Device Location IE" },
{ IEEE802154_P_IE_TVWS_CH_INFOR_QUERY_SH, "TVWS Channel Information Query IE" },
{ IEEE802154_P_IE_TVWS_CH_INFOR_SOURCE_SH, "TVWS Channel Information Source IE" },
{ IEEE802154_P_IE_CTM_SH, "CTM IE" },
{ IEEE802154_P_IE_TIMESTAMP_SH, "Timestamp IE" },
{ IEEE802154_P_IE_TIMESTAMP_DIFF_SH, "Timestamp Difference IE"},
{ IEEE802154_P_IE_TMCP_SPECIFICATION_SH, "TMCTP Specification IE" },
{ IEEE802154_P_IE_RCC_PHY_OPER_MODE_SH, "RCC PHY Operating Mode IE" },
{ 0, NULL }
};
static const value_string ieee802154_h_mlme_sub_long_information_elements[] = {
{ IEEE802154_P_IE_VENDOR_SPECIFIC_LG, "Vendor Specific IE " },
{ IEEE802154_P_IE_CHANNEL_HOPPING_LG, "Channel Hopping IE" },
{ 0, NULL }
};
static const value_string ieee802154_p_information_elements[] = {
{ IEEE802154_P_IE_ESDU, "Encapsulated Service Data Unit" },
{ IEEE802154_P_IE_MLME, "MLME IE" },
{ IEEE802154_P_IE_VENDOR_SPECIFIC, "Vendor Specific IE" },
{ IEEE802154_P_IE_PAYLOAD_TERM, "Payload Termination IE" },
{ 0, NULL }
};
/* ------------------------------------------------------------------------------------- */
static const true_false_string ieee802154_gts_direction_tfs = {
"Receive Only",
"Transmit Only"
};
/* The 802.15.4-2003 security suites for the security preferences (only AES-CCM suites are supported). */
/* NOTE: The equivalent 2006 security level identifer enumerations are used to simplify 2003 & 2006 integration! */
static const enum_val_t ieee802154_2003_sec_suite_enums[] = {
{ "AES-CCM-128", "AES-128 Encryption, 128-bit Integrity Protection", SECURITY_LEVEL_ENC_MIC_128 },
{ "AES-CCM-64", "AES-128 Encryption, 64-bit Integrity Protection", SECURITY_LEVEL_ENC_MIC_64 },
{ "AES-CCM-32", "AES-128 Encryption, 32-bit Integrity Protection", SECURITY_LEVEL_ENC_MIC_32 },
{ NULL, NULL, 0 }
};
/* Preferences for 2003 security */
static gint ieee802154_sec_suite = SECURITY_LEVEL_ENC_MIC_64;
static gboolean ieee802154_extend_auth = TRUE;
/* Macro to check addressing, and throw a warning flag if incorrect. */
#define IEEE802154_CMD_ADDR_CHECK(_pinfo_, _item_, _cmdid_, _x_) \
if (!(_x_)) \
expert_add_info_format(_pinfo_, _item_, &ei_ieee802154_invalid_addressing, \
"Invalid Addressing for %s", \
val_to_str_const(_cmdid_, ieee802154_cmd_names, "Unknown Command"))
/* CRC definitions. IEEE 802.15.4 CRCs vary from CCITT by using an initial value of
* 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_h_inf_elem
* DESCRIPTION
* Dissector helper, parses and displays the information element(s).
*
* 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
*---------------------------------------------------------------
*/
int size_header (ieee802154_packet *packet) {
guint8 mac_header_size = 0;
/*FCF size*/
switch (packet->frame_type){
case IEEE802154_FCF_MULTIPURPOSE:
break;
case IEEE802154_FCF_FRAGMENT_FRAG:
break;
case IEEE802154_FCF_EXTENDED:
break;
default:
mac_header_size += 2;
break;
}
/* Destination Addressing Mode field */
switch (packet->dst_addr_mode) {
/* Short address*/
case IEEE802154_FCF_ADDR_SHORT:
mac_header_size += 2;
/* Destination PAN exists */
mac_header_size += 2;
break;
/* Long address*/
case IEEE802154_FCF_ADDR_EXT:
mac_header_size += 8;
/* Destination PAN exists */
mac_header_size += 2;
break;
default:
break;
}
/* Source Addressing Mode field */
switch (packet->src_addr_mode) {
case IEEE802154_FCF_ADDR_SHORT:
mac_header_size += 2;
/* Destination PAN exists */
/* In order to match the technical discussions at the 6TiSCH plugtest telco on 2 July 2015:
THERE WILL NOT BE ANY PAN ID SOURCE, NO MATTER WHAT WITH THE BIT --PAN ID compression-- (packet->intra_pan)
that's why the following 3 lines are commented
*/
//if (!packet->intra_pan){
// mac_header_size += 2;
//}
break;
case IEEE802154_FCF_ADDR_EXT:
mac_header_size += 8;
/* Destination PAN exists */
/* In order to match the technical discussions at the 6TiSCH plugtest telco on 2 July 2015:
THERE WILL NOT BE ANY PAN ID SOURCE, NO MATTER WHAT WITH THE BIT --PAN ID compression-- (packet->intra_pan)
that's why the following 3 lines are commented
*/
//if (!packet->intra_pan){
// mac_header_size += 2;
//}
break;
default:
break;
}
/* bit Sequence Number Suppression*/
if (!packet->seqnr_suppresion){
mac_header_size += 1;
}
return mac_header_size;
}
/*FUNCTION:------------------------------------------------------
* NAME
* dissect_ieee802154_h_inf_elem
* DESCRIPTION
* Dissector helper, parses and displays the information element(s).
*
* 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_h_inf_elem(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, ieee802154_packet *packet, guint *offset)
{
/* IEEE802154_FCS_LEN */
gboolean condition;
condition = TRUE;
packet->keep_dissecting = tvb_reported_length(tvb) - IEEE802154_FCS_LEN - size_header (packet);
packet->h_ie_size = 0;
//packet->keep_dissecting_p_ie = tvb_reported_length(tvb) - IEEE802154_FCS_LEN - size_header(packet);
/* fcs = tvb_get_letohs(tvb, tvb_reported_length(tvb)-IEEE802154_FCS_LEN);*/
while (condition) {
guint16 header_ie;
proto_tree *field_tree;
gint reported_len;
gint captured_len;
tvbuff_t *volatile payload_tvb;
/*value_string pos;*/
/* Get the information within the Information's Element header */
header_ie = tvb_get_letohs(tvb, *offset);
/* Parse the Header IE header */
packet->h_ie_content_lenght = header_ie & IEEE802154_H_IE_LENGTH;
packet->h_ie_id = (header_ie & IEEE802154_H_IE_ID) >> 7;
packet->h_ie_type = (header_ie & IEEE802154_H_IE_TYPE) >> 15;
packet->keep_dissecting -= (packet->h_ie_content_lenght + 2);
packet->h_ie_size += (packet->h_ie_content_lenght + 2);
//packet->keep_dissecting_p_ie -= (packet->h_ie_content_lenght + 2);
/* Display the frame type. */
proto_item_append_text(tree, " %s", val_to_str_const(packet->h_ie_id, ieee802154_h_information_elements, "1"));
col_set_str(pinfo->cinfo, COL_INFO, val_to_str_const(packet->h_ie_id, ieee802154_h_information_elements, "2"));
proto_item_append_text(tree, " %s", val_to_str_const(packet->frame_type, ieee802154_frame_types, "3"/*"Reserved"*/));
col_set_str(pinfo->cinfo, COL_INFO, val_to_str_const(packet->frame_type, ieee802154_frame_types, "4"/*"Reserved")*/));
/* Add the Header Information Element's header to the protocol tree. */
if (tree) {
/* Create the FCF subtree. */
field_tree = proto_tree_add_subtree_format(tree, tvb, *offset, 2, ett_ieee802154_h_ie, NULL,
"Header Information Elements: %s (0x%04x)",
val_to_str_const(packet->h_ie_id, ieee802154_h_information_elements, "Unknown"), header_ie);
/* Header Information Elements header's values */
proto_tree_add_uint(field_tree, hf_ieee802154_h_ie_content_lenght, tvb, (*offset), 1, header_ie & IEEE802154_H_IE_LENGTH);
proto_tree_add_uint(field_tree, hf_ieee802154_h_ie_id, tvb, (*offset), 1, header_ie & IEEE802154_H_IE_ID);
proto_tree_add_boolean(field_tree, hf_ieee802154_h_ie_type, tvb, (*offset)+1, 1, header_ie & IEEE802154_H_IE_TYPE);
}
/*pos = ieee802154_h_information_elements[packet->h_ie_id];*/
//*offset += (2 + packet->h_ie_content_lenght);
*offset += 2 ;
reported_len = packet->h_ie_content_lenght;
captured_len = reported_len;
payload_tvb = tvb_new_subset(tvb, *offset, captured_len, reported_len);
call_dissector(data_handle, payload_tvb, pinfo, tree);
*offset += packet->h_ie_content_lenght;
switch(packet->h_ie_id) {
case IEEE802154_H_IE_HDR_TERM_1:
packet->p_ie_present = TRUE;
condition = FALSE;
break;
case IEEE802154_H_IE_HDR_TERM_2:
condition = FALSE;
break;
default:
if (!packet->keep_dissecting > 0) {
condition = FALSE;
}
break;
}
}
}
/*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_seqnr_supression,
&hf_ieee802154_ielist_present,
&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->seqnr_suppresion = fcf & IEEE802154_FCF_SEQNR_SUPPR; /* according to 2015 spec. */
packet->ielist_present = fcf & IEEE802154_FCF_IELIST_PRESENT; /* according to 2015 spec. */
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, "3"/*"Reserved"*/));
col_set_str(pinfo->cinfo, COL_INFO, val_to_str_const(packet->frame_type, ieee802154_frame_types, "4"/*"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_p_inf_elem
* DESCRIPTION
* Dissector helper, parses and displays the information element(s).
*
* 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_p_inf_elem(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, ieee802154_packet *packet, guint *offset)
{
gboolean condition;
proto_tree *p_inf_elem_tree = NULL;
/* Create the protocol tree. */
if (tree) {
//proto_root = proto_tree_add_protocol_format(tree, proto_ieee802154_nonask_phy, tvb, 0, tvb_captured_length(tvb), "IEEE 802.15.4 non-ASK PHY");
p_inf_elem_tree = proto_item_add_subtree(tree, ett_ieee802154_p_ie);
}
condition = TRUE;
packet->keep_dissecting_p_ie = tvb_reported_length(tvb) - IEEE802154_FCS_LEN - size_header(packet) - packet->h_ie_size;
while (condition) {
guint16 payload_ie;
//proto_tree *field_tree;
/* Get the information within the Information's Element header */
payload_ie = tvb_get_letohs(tvb, *offset);
/* Parse the Payload IE header */
packet->p_ie_content_lenght = payload_ie & IEEE802154_P_IE_LENGTH;
packet->p_ie_id = (payload_ie & IEEE802154_P_IE_ID) >> 11;
packet->p_ie_type = (payload_ie & IEEE802154_P_IE_TYPE) >> 15;
packet->keep_dissecting_p_ie -= (packet->p_ie_content_lenght + 2);
/* Display the frame type. */
/*proto_item_append_text(tree, " %s", val_to_str_const(packet->frame_type, ieee802154_frame_types, "3"));
col_set_str(pinfo->cinfo, COL_INFO, val_to_str_const(packet->frame_type, ieee802154_frame_types, "4"));*/
/* proto_item_append_text(tree, " %s", val_to_str_const(packet->p_ie_id, ieee802154_p_information_elements, "5"));
col_set_str(pinfo->cinfo, COL_INFO, val_to_str_const(packet->p_ie_id, ieee802154_p_information_elements, "6")); */
/* Add the Payload Information Element's header to the protocol tree. */
if (tree) {
/* Create the FCF subtree. */
p_inf_elem_tree = proto_tree_add_subtree_format(tree, tvb, *offset, 2, ett_ieee802154_p_ie, NULL,
"Payload Information Elements: %s (0x%04x)",
val_to_str_const(packet->p_ie_id, ieee802154_p_information_elements, "Unknown"), payload_ie);
/* Payload Information Elements header's values */
proto_tree_add_uint(p_inf_elem_tree, hf_ieee802154_p_ie_content_lenght, tvb, (*offset), 1, payload_ie & IEEE802154_P_IE_LENGTH);
proto_tree_add_uint(p_inf_elem_tree, hf_ieee802154_p_ie_id, tvb, (*offset)+1, 1, payload_ie & IEEE802154_P_IE_ID);
proto_tree_add_boolean(p_inf_elem_tree, hf_ieee802154_p_ie_type, tvb, (*offset)+1, 1, payload_ie & IEEE802154_P_IE_TYPE);
}
switch (packet->p_ie_id) {
case IEEE802154_P_IE_PAYLOAD_TERM:
condition = FALSE;
*offset += (2 + packet->p_ie_content_lenght);
break;
case IEEE802154_P_IE_MLME:
*offset += 2;
dissect_ieee802154_p_inf_elem_mlme(tvb, pinfo, p_inf_elem_tree, packet, offset);
break;
default :
*offset += (2 + packet->p_ie_content_lenght);
break;
}
if (packet->keep_dissecting_p_ie == 0){
condition = FALSE;
}
}
}
/*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_p_inf_elem_mlme(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, ieee802154_packet *packet, guint *offset)
{
gboolean conditionn;
conditionn = TRUE;
packet->keep_dissecting = 0;
while (conditionn){
guint16 mlme_header;
gint reported_len;
gint captured_len;
tvbuff_t *volatile payload_tvb;
proto_tree *field_tree;
mlme_header = tvb_get_letohs(tvb, *offset);
packet->p_ie_mlme_type = (mlme_header & IEEE802154_P_IE_TYPE) >> 15;
if (packet->p_ie_mlme_type) {
packet->p_ie_mlme_lg_lenght = mlme_header & IEEE802154_P_MLME_LONG_LENGTH;
packet->p_ie_mlme_lg_id = (mlme_header & IEEE802154_P_MLME_LONG_ID) >> 11;
packet->keep_dissecting += (2 + packet->p_ie_mlme_lg_lenght);
/*mlme_memory_counter += (2 + packet->p_ie_mlme_lg_lenght);*/
if (packet->keep_dissecting >= packet->p_ie_content_lenght) {
conditionn = FALSE;
}
proto_item_append_text(tree, " %s", val_to_str_const(packet->p_ie_mlme_lg_id, ieee802154_h_mlme_sub_long_information_elements, "Unknown"));
col_set_str(pinfo->cinfo, COL_INFO, val_to_str_const(packet->p_ie_mlme_lg_id, ieee802154_h_mlme_sub_long_information_elements, "Unknown"));
if (tree) {
/* Create the FCF subtree. */
field_tree = proto_tree_add_subtree_format(tree, tvb, *offset, 2, ett_ieee802154_mlme_lg_p_ie, NULL,
"Long MLME Information Elements: %s (0x%04x)",
val_to_str_const(packet->p_ie_mlme_lg_id, ieee802154_h_mlme_sub_long_information_elements, "Unknown"), mlme_header);
/* MLME IE Information Elements header's values */
proto_tree_add_uint(field_tree, hf_ieee802154_p_ie_mlme_lg_lenght, tvb, (*offset), 1, mlme_header & IEEE802154_P_MLME_LONG_LENGTH);
proto_tree_add_uint(field_tree, hf_ieee802154_p_ie_mlme_lg_id, tvb, (*offset)+1, 1, mlme_header & IEEE802154_P_MLME_LONG_ID);
proto_tree_add_boolean(field_tree, hf_ieee802154_p_ie_mlme_type, tvb, (*offset)+1, 1, mlme_header & IEEE802154_P_IE_TYPE);
*offset += 2 ;
reported_len = packet->p_ie_mlme_lg_lenght;
captured_len = reported_len;
payload_tvb = tvb_new_subset(tvb, *offset, captured_len, reported_len);
call_dissector(data_handle, payload_tvb, pinfo, tree);
*offset += packet->p_ie_mlme_lg_lenght;
//call_dissector(data_handle, tvb, pinfo, field_tree);
// *offset += 2 + packet->p_ie_mlme_lg_lenght;
//gint reported_len = tvb_reported_length(tvb)-offset-IEEE802154_FCS_LEN;
//gint captured_len = tvb_captured_length(tvb)-offset;
//if (reported_len < captured_len) captured_len = reported_len;
//payload_tvb = tvb_new_subset(tvb, offset, captured_len, reported_len);
//call_dissector(data_handle, tvb, pinfo, field_tree);
}
}
else {
packet->p_ie_mlme_sh_lenght = mlme_header & IEEE802154_P_MLME_SHORT_LENGTH;
packet->p_ie_mlme_sh_id = (mlme_header & IEEE802154_P_MLME_SHORT_ID) >> 8;
packet->keep_dissecting += (2 + packet->p_ie_mlme_sh_lenght);
if (packet->keep_dissecting >= packet->p_ie_content_lenght) {
conditionn = FALSE;
}
proto_item_append_text(tree, " %s", val_to_str_const(packet->p_ie_mlme_sh_id, ieee802154_h_mlme_sub_short_information_elements, "Unknown"));
col_set_str(pinfo->cinfo, COL_INFO, val_to_str_const(packet->p_ie_mlme_sh_id, ieee802154_h_mlme_sub_short_information_elements, "Unknown"));
if (tree) {
/* Create the FCF subtree. */
field_tree = proto_tree_add_subtree_format(tree, tvb, *offset, 2, ett_ieee802154_mlme_sh_p_ie, NULL,
"Short MLME Information Elements: %s (0x%04x)",
val_to_str_const(packet->p_ie_mlme_sh_id, ieee802154_h_mlme_sub_short_information_elements, "Unknown"), mlme_header);
/* Header Information Elements header's values */
proto_tree_add_uint(field_tree, hf_ieee802154_p_ie_mlme_sh_lenght, tvb, (*offset), 1, mlme_header & IEEE802154_P_MLME_SHORT_LENGTH);
proto_tree_add_uint(field_tree, hf_ieee802154_p_ie_mlme_sh_id, tvb, (*offset)+1, 1, mlme_header & IEEE802154_P_MLME_SHORT_ID);
proto_tree_add_boolean(field_tree, hf_ieee802154_p_ie_mlme_type, tvb, (*offset)+1, 1, mlme_header & IEEE802154_P_IE_TYPE);
//call_dissector(data_handle, tvb, pinfo, field_tree);
//*offset += 2 + packet->p_ie_mlme_sh_lenght;
*offset += 2 ;
reported_len = packet->p_ie_mlme_sh_lenght;
captured_len = reported_len;
payload_tvb = tvb_new_subset(tvb, *offset, captured_len, reported_len);
call_dissector(data_handle, payload_tvb, pinfo, tree);
*offset += packet->p_ie_mlme_sh_lenght;
}
}
}
}
/*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