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print-802_15_4.c
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print-802_15_4.c
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/*
* Copyright (c) 2009
* Siemens AG, All rights reserved.
* Dmitry Eremin-Solenikov ([email protected])
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that: (1) source code distributions
* retain the above copyright notice and this paragraph in its entirety, (2)
* distributions including binary code include the above copyright notice and
* this paragraph in its entirety in the documentation or other materials
* provided with the distribution, and (3) all advertising materials mentioning
* features or use of this software display the following acknowledgement:
* ``This product includes software developed by the University of California,
* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
* the University nor the names of its contributors may be used to endorse
* or promote products derived from this software without specific prior
* written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
/* \summary: IEEE 802.15.4 printer */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "netdissect-stdinc.h"
#include "netdissect.h"
#include "addrtoname.h"
#include "extract.h"
#define CHECK_BIT(num,bit) (((num) >> (bit)) & 0x1)
#define BROKEN_6TISCH_PAN_ID_COMPRESSION 0
/* Frame types from Table 7-1 of 802.15.4-2015 */
static const char *ftypes[] = {
"Beacon", /* 0 */
"Data", /* 1 */
"ACK", /* 2 */
"Command", /* 3 */
"Reserved", /* 4 */
"Multipurpose", /* 5 */
"Fragment", /* 6 */
"Extended" /* 7 */
};
/* Element IDs for Header IEs from Table 7-7 of 802.15.4-2015 */
static const char *h_ie_names[] = {
"Vendor Specific Header IE", /* 0x00 */
"Reserved 0x01", /* 0x01 */
"Reserved 0x02", /* 0x02 */
"Reserved 0x03", /* 0x03 */
"Reserved 0x04", /* 0x04 */
"Reserved 0x05", /* 0x05 */
"Reserved 0x06", /* 0x06 */
"Reserved 0x07", /* 0x07 */
"Reserved 0x08", /* 0x08 */
"Reserved 0x09", /* 0x09 */
"Reserved 0x0a", /* 0x0a */
"Reserved 0x0b", /* 0x0b */
"Reserved 0x0c", /* 0x0c */
"Reserved 0x0d", /* 0x0d */
"Reserved 0x0e", /* 0x0e */
"Reserved 0x0f", /* 0x0f */
"Reserved 0x10", /* 0x10 */
"Reserved 0x11", /* 0x11 */
"Reserved 0x12", /* 0x12 */
"Reserved 0x13", /* 0x13 */
"Reserved 0x14", /* 0x14 */
"Reserved 0x15", /* 0x15 */
"Reserved 0x16", /* 0x16 */
"Reserved 0x17", /* 0x17 */
"Reserved 0x18", /* 0x18 */
"Reserved 0x19", /* 0x19 */
"LE CSL IE", /* 0x1a */
"LE RIT IE", /* 0x1b */
"DSME PAN descriptor IE", /* 0x1c */
"Rendezvous Time IE", /* 0x1d */
"Time Correction IE", /* 0x1e */
"Reserved 0x1f", /* 0x1f */
"Reserved 0x20", /* 0x20 */
"Extended DSME PAN descriptor IE", /* 0x21 */
"Fragment Sequence Context Description IE", /* 0x22 */
"Simplified Superframe Specification IE", /* 0x23 */
"Simplified GTS Specification IE", /* 0x24 */
"LECIM Capabilities IE", /* 0x25 */
"TRLE Descriptor IE", /* 0x26 */
"RCC Capabilities IE", /* 0x27 */
"RCCN Descriptor IE", /* 0x28 */
"Global Time IE", /* 0x29 */
"Omnibus Header IE", /* 0x2a */
"DA IE", /* 0x2b */
"Reserved 0x2c", /* 0x2c */
"Reserved 0x2d", /* 0x2d */
"Reserved 0x2e", /* 0x2e */
"Reserved 0x2f", /* 0x2f */
"Reserved 0x30", /* 0x30 */
"Reserved 0x31", /* 0x31 */
"Reserved 0x32", /* 0x32 */
"Reserved 0x33", /* 0x33 */
"Reserved 0x34", /* 0x34 */
"Reserved 0x35", /* 0x35 */
"Reserved 0x36", /* 0x36 */
"Reserved 0x37", /* 0x37 */
"Reserved 0x38", /* 0x38 */
"Reserved 0x39", /* 0x39 */
"Reserved 0x3a", /* 0x3a */
"Reserved 0x3b", /* 0x3b */
"Reserved 0x3c", /* 0x3c */
"Reserved 0x3d", /* 0x3d */
"Reserved 0x3e", /* 0x3e */
"Reserved 0x3f", /* 0x3f */
"Reserved 0x40", /* 0x40 */
"Reserved 0x41", /* 0x41 */
"Reserved 0x42", /* 0x42 */
"Reserved 0x43", /* 0x43 */
"Reserved 0x44", /* 0x44 */
"Reserved 0x45", /* 0x45 */
"Reserved 0x46", /* 0x46 */
"Reserved 0x47", /* 0x47 */
"Reserved 0x48", /* 0x48 */
"Reserved 0x49", /* 0x49 */
"Reserved 0x4a", /* 0x4a */
"Reserved 0x4b", /* 0x4b */
"Reserved 0x4c", /* 0x4c */
"Reserved 0x4d", /* 0x4d */
"Reserved 0x4e", /* 0x4e */
"Reserved 0x4f", /* 0x4f */
"Reserved 0x50", /* 0x50 */
"Reserved 0x51", /* 0x51 */
"Reserved 0x52", /* 0x52 */
"Reserved 0x53", /* 0x53 */
"Reserved 0x54", /* 0x54 */
"Reserved 0x55", /* 0x55 */
"Reserved 0x56", /* 0x56 */
"Reserved 0x57", /* 0x57 */
"Reserved 0x58", /* 0x58 */
"Reserved 0x59", /* 0x59 */
"Reserved 0x5a", /* 0x5a */
"Reserved 0x5b", /* 0x5b */
"Reserved 0x5c", /* 0x5c */
"Reserved 0x5d", /* 0x5d */
"Reserved 0x5e", /* 0x5e */
"Reserved 0x5f", /* 0x5f */
"Reserved 0x60", /* 0x60 */
"Reserved 0x61", /* 0x61 */
"Reserved 0x62", /* 0x62 */
"Reserved 0x63", /* 0x63 */
"Reserved 0x64", /* 0x64 */
"Reserved 0x65", /* 0x65 */
"Reserved 0x66", /* 0x66 */
"Reserved 0x67", /* 0x67 */
"Reserved 0x68", /* 0x68 */
"Reserved 0x69", /* 0x69 */
"Reserved 0x6a", /* 0x6a */
"Reserved 0x6b", /* 0x6b */
"Reserved 0x6c", /* 0x6c */
"Reserved 0x6d", /* 0x6d */
"Reserved 0x6e", /* 0x6e */
"Reserved 0x6f", /* 0x6f */
"Reserved 0x70", /* 0x70 */
"Reserved 0x71", /* 0x71 */
"Reserved 0x72", /* 0x72 */
"Reserved 0x73", /* 0x73 */
"Reserved 0x74", /* 0x74 */
"Reserved 0x75", /* 0x75 */
"Reserved 0x76", /* 0x76 */
"Reserved 0x77", /* 0x77 */
"Reserved 0x78", /* 0x78 */
"Reserved 0x79", /* 0x79 */
"Reserved 0x7a", /* 0x7a */
"Reserved 0x7b", /* 0x7b */
"Reserved 0x7c", /* 0x7c */
"Reserved 0x7d", /* 0x7d */
"Header Termination 1 IE", /* 0x7e */
"Header Termination 2 IE" /* 0x7f */
};
/* Payload IE Group IDs from Table 7-15 of 802.15.4-2015 */
static const char *p_ie_names[] = {
"ESDU IE", /* 0x00 */
"MLME IE", /* 0x01 */
"Vendor Specific Nested IE", /* 0x02 */
"Multiplexed IE (802.15.9)", /* 0x03 */
"Omnibus Payload Group IE", /* 0x04 */
"IETF IE", /* 0x05 */
"Reserved 0x06", /* 0x06 */
"Reserved 0x07", /* 0x07 */
"Reserved 0x08", /* 0x08 */
"Reserved 0x09", /* 0x09 */
"Reserved 0x0a", /* 0x0a */
"Reserved 0x0b", /* 0x0b */
"Reserved 0x0c", /* 0x0c */
"Reserved 0x0d", /* 0x0d */
"Reserved 0x0e", /* 0x0e */
"List termination" /* 0x0f */
};
/* Sub-ID for short format from Table 7-16 of 802.15.4-2015 */
static const char *p_mlme_short_names[] = {
"Reserved for long format 0x0", /* 0x00 */
"Reserved for long format 0x1", /* 0x01 */
"Reserved for long format 0x2", /* 0x02 */
"Reserved for long format 0x3", /* 0x03 */
"Reserved for long format 0x4", /* 0x04 */
"Reserved for long format 0x5", /* 0x05 */
"Reserved for long format 0x6", /* 0x06 */
"Reserved for long format 0x7", /* 0x07 */
"Reserved for long format 0x8", /* 0x08 */
"Reserved for long format 0x9", /* 0x09 */
"Reserved for long format 0xa", /* 0x0a */
"Reserved for long format 0xb", /* 0x0b */
"Reserved for long format 0xc", /* 0x0c */
"Reserved for long format 0xd", /* 0x0d */
"Reserved for long format 0xe", /* 0x0e */
"Reserved for long format 0xf", /* 0x0f */
"Reserved 0x10", /* 0x10 */
"Reserved 0x11", /* 0x11 */
"Reserved 0x12", /* 0x12 */
"Reserved 0x13", /* 0x13 */
"Reserved 0x14", /* 0x14 */
"Reserved 0x15", /* 0x15 */
"Reserved 0x16", /* 0x16 */
"Reserved 0x17", /* 0x17 */
"Reserved 0x18", /* 0x18 */
"Reserved 0x19", /* 0x19 */
"TSCH Synchronization IE", /* 0x1a */
"TSCH Slotframe and Link IE", /* 0x1b */
"TSCH Timeslot IE", /* 0x1c */
"Hopping timing IE", /* 0x1d */
"Enhanced Beacon Filter IE", /* 0x1e */
"MAC Metrics IE", /* 0x1f */
"All MAC Metrics IE", /* 0x20 */
"Coexistence Specification IE", /* 0x21 */
"SUN Device Capabilities IE", /* 0x22 */
"SUN FSK Generic PHY IE", /* 0x23 */
"Mode Switch Parameter IE", /* 0x24 */
"PHY Parameter Change IE", /* 0x25 */
"O-QPSK PHY Mode IE", /* 0x26 */
"PCA Allocation IE", /* 0x27 */
"LECIM DSSS Operating Mode IE", /* 0x28 */
"LECIM FSK Operating Mode IE", /* 0x29 */
"Reserved 0x2a", /* 0x2a */
"TVWS PHY Operating Mode Description IE", /* 0x2b */
"TVWS Device Capabilities IE", /* 0x2c */
"TVWS Device Category IE", /* 0x2d */
"TVWS Device Identiication IE", /* 0x2e */
"TVWS Device Location IE", /* 0x2f */
"TVWS Channel Information Query IE", /* 0x30 */
"TVWS Channel Information Source IE", /* 0x31 */
"CTM IE", /* 0x32 */
"Timestamp IE", /* 0x33 */
"Timestamp Difference IE", /* 0x34 */
"TMCTP Sepcification IE", /* 0x35 */
"RCC PHY Operating Mode IE", /* 0x36 */
"Reserved 0x37", /* 0x37 */
"Reserved 0x38", /* 0x38 */
"Reserved 0x39", /* 0x39 */
"Reserved 0x3a", /* 0x3a */
"Reserved 0x3b", /* 0x3b */
"Reserved 0x3c", /* 0x3c */
"Reserved 0x3d", /* 0x3d */
"Reserved 0x3e", /* 0x3e */
"Reserved 0x3f", /* 0x3f */
"Reserved 0x40", /* 0x40 */
"Reserved 0x41", /* 0x41 */
"Reserved 0x42", /* 0x42 */
"Reserved 0x43", /* 0x43 */
"Reserved 0x44", /* 0x44 */
"Reserved 0x45", /* 0x45 */
"Reserved 0x46", /* 0x46 */
"Reserved 0x47", /* 0x47 */
"Reserved 0x48", /* 0x48 */
"Reserved 0x49", /* 0x49 */
"Reserved 0x4a", /* 0x4a */
"Reserved 0x4b", /* 0x4b */
"Reserved 0x4c", /* 0x4c */
"Reserved 0x4d", /* 0x4d */
"Reserved 0x4e", /* 0x4e */
"Reserved 0x4f", /* 0x4f */
"Reserved 0x50", /* 0x50 */
"Reserved 0x51", /* 0x51 */
"Reserved 0x52", /* 0x52 */
"Reserved 0x53", /* 0x53 */
"Reserved 0x54", /* 0x54 */
"Reserved 0x55", /* 0x55 */
"Reserved 0x56", /* 0x56 */
"Reserved 0x57", /* 0x57 */
"Reserved 0x58", /* 0x58 */
"Reserved 0x59", /* 0x59 */
"Reserved 0x5a", /* 0x5a */
"Reserved 0x5b", /* 0x5b */
"Reserved 0x5c", /* 0x5c */
"Reserved 0x5d", /* 0x5d */
"Reserved 0x5e", /* 0x5e */
"Reserved 0x5f", /* 0x5f */
"Reserved 0x60", /* 0x60 */
"Reserved 0x61", /* 0x61 */
"Reserved 0x62", /* 0x62 */
"Reserved 0x63", /* 0x63 */
"Reserved 0x64", /* 0x64 */
"Reserved 0x65", /* 0x65 */
"Reserved 0x66", /* 0x66 */
"Reserved 0x67", /* 0x67 */
"Reserved 0x68", /* 0x68 */
"Reserved 0x69", /* 0x69 */
"Reserved 0x6a", /* 0x6a */
"Reserved 0x6b", /* 0x6b */
"Reserved 0x6c", /* 0x6c */
"Reserved 0x6d", /* 0x6d */
"Reserved 0x6e", /* 0x6e */
"Reserved 0x6f", /* 0x6f */
"Reserved 0x70", /* 0x70 */
"Reserved 0x71", /* 0x71 */
"Reserved 0x72", /* 0x72 */
"Reserved 0x73", /* 0x73 */
"Reserved 0x74", /* 0x74 */
"Reserved 0x75", /* 0x75 */
"Reserved 0x76", /* 0x76 */
"Reserved 0x77", /* 0x77 */
"Reserved 0x78", /* 0x78 */
"Reserved 0x79", /* 0x79 */
"Reserved 0x7a", /* 0x7a */
"Reserved 0x7b", /* 0x7b */
"Reserved 0x7c", /* 0x7c */
"Reserved 0x7d", /* 0x7d */
"Reserved 0x7e", /* 0x7e */
"Reserved 0x7f" /* 0x7f */
};
/* Sub-ID for long format from Table 7-17 of 802.15.4-2015 */
static const char *p_mlme_long_names[] = {
"Reserved 0x00", /* 0x00 */
"Reserved 0x01", /* 0x01 */
"Reserved 0x02", /* 0x02 */
"Reserved 0x03", /* 0x03 */
"Reserved 0x04", /* 0x04 */
"Reserved 0x05", /* 0x05 */
"Reserved 0x06", /* 0x06 */
"Reserved 0x07", /* 0x07 */
"Vendor Specific MLME Nested IE", /* 0x08 */
"Channel Hopping IE", /* 0x09 */
"Reserved 0x0a", /* 0x0a */
"Reserved 0x0b", /* 0x0b */
"Reserved 0x0c", /* 0x0c */
"Reserved 0x0d", /* 0x0d */
"Reserved 0x0e", /* 0x0e */
"Reserved 0x0f" /* 0x0f */
};
/* MAC commands from Table 7-49 of 802.15.4-2015 */
static const char *mac_c_names[] = {
"Reserved 0x00", /* 0x00 */
"Association Request command", /* 0x01 */
"Association Response command", /* 0x02 */
"Disassociation Notification command", /* 0x03 */
"Data Request command", /* 0x04 */
"PAN ID Conflict Notification command", /* 0x05 */
"Orphan Notification command", /* 0x06 */
"Beacon Request command", /* 0x07 */
"Coordinator realignment command", /* 0x08 */
"GTS request command", /* 0x09 */
"TRLE Management Request command", /* 0x0a */
"TRLE Management Response command", /* 0x0b */
"Reserved 0x0c", /* 0x0c */
"Reserved 0x0d", /* 0x0d */
"Reserved 0x0e", /* 0x0e */
"Reserved 0x0f", /* 0x0f */
"Reserved 0x10", /* 0x10 */
"Reserved 0x11", /* 0x11 */
"Reserved 0x12", /* 0x12 */
"DSME Association Request command", /* 0x13 */
"DSME Association Response command", /* 0x14 */
"DSME GTS Request command", /* 0x15 */
"DSME GTS Response command", /* 0x16 */
"DSME GTS Notify command", /* 0x17 */
"DSME Information Request command", /* 0x18 */
"DSME Information Response command", /* 0x19 */
"DSME Beacon Allocation Notification command", /* 0x1a */
"DSME Beacon Collision Notification command", /* 0x1b */
"DSME Link Report command", /* 0x1c */
"Reserved 0x1d", /* 0x1d */
"Reserved 0x1e", /* 0x1e */
"Reserved 0x1f", /* 0x1f */
"RIT Data Request command", /* 0x20 */
"DBS Request command", /* 0x21 */
"DBS Response command", /* 0x22 */
"RIT Data Response command", /* 0x23 */
"Vendor Specific command", /* 0x24 */
"Reserved 0x25", /* 0x25 */
"Reserved 0x26", /* 0x26 */
"Reserved 0x27", /* 0x27 */
"Reserved 0x28", /* 0x28 */
"Reserved 0x29", /* 0x29 */
"Reserved 0x2a", /* 0x2a */
"Reserved 0x2b", /* 0x2b */
"Reserved 0x2c", /* 0x2c */
"Reserved 0x2d", /* 0x2d */
"Reserved 0x2e", /* 0x2e */
"Reserved 0x2f" /* 0x2f */
};
/*
* Frame Control subfields.
*/
#define FC_FRAME_TYPE(fc) ((fc) & 0x7)
#define FC_FRAME_VERSION(fc) (((fc) >> 12) & 0x3)
#define FC_ADDRESSING_MODE_NONE 0x00
#define FC_ADDRESSING_MODE_RESERVED 0x01
#define FC_ADDRESSING_MODE_SHORT 0x02
#define FC_ADDRESSING_MODE_LONG 0x03
/*
* IEEE 802.15.4 CRC 16 function. This is using CCITT polynomical of 0x1021,
* but the initial value is 0, and the bits are reversed for both in and out.
* See secton 7.2.10 of 802.15.4-2015 for more information.
*/
static uint16_t
ieee802_15_4_crc16(netdissect_options *ndo, const u_char *p,
u_int data_len)
{
uint16_t crc;
u_char x, y;
crc = 0x0000; /* Note, initial value is 0x0000 not 0xffff. */
while (data_len != 0){
y = GET_U_1(p);
p++;
/* Reverse bits on input */
y = (((y & 0xaa) >> 1) | ((y & 0x55) << 1));
y = (((y & 0xcc) >> 2) | ((y & 0x33) << 2));
y = (((y & 0xf0) >> 4) | ((y & 0x0f) << 4));
/* Update CRC */
x = crc >> 8 ^ y;
x ^= x >> 4;
crc = ((uint16_t)(crc << 8)) ^
((uint16_t)(x << 12)) ^
((uint16_t)(x << 5)) ^
((uint16_t)x);
data_len--;
}
/* Reverse bits on output */
crc = (((crc & 0xaaaa) >> 1) | ((crc & 0x5555) << 1));
crc = (((crc & 0xcccc) >> 2) | ((crc & 0x3333) << 2));
crc = (((crc & 0xf0f0) >> 4) | ((crc & 0x0f0f) << 4));
crc = (((crc & 0xff00) >> 8) | ((crc & 0x00ff) << 8));
return crc;
}
/*
* Reverses the bits of the 32-bit word.
*/
static uint32_t
ieee802_15_4_reverse32(uint32_t x)
{
x = ((x & 0x55555555) << 1) | ((x >> 1) & 0x55555555);
x = ((x & 0x33333333) << 2) | ((x >> 2) & 0x33333333);
x = ((x & 0x0F0F0F0F) << 4) | ((x >> 4) & 0x0F0F0F0F);
x = (x << 24) | ((x & 0xFF00) << 8) |
((x >> 8) & 0xFF00) | (x >> 24);
return x;
}
/*
* IEEE 802.15.4 CRC 32 function. This is using ANSI X3.66-1979 polynomical of
* 0x04C11DB7, but the initial value is 0, and the bits are reversed for both
* in and out. See secton 7.2.10 of 802.15.4-2015 for more information.
*/
static uint32_t
ieee802_15_4_crc32(netdissect_options *ndo, const u_char *p,
u_int data_len)
{
uint32_t crc, byte;
int b;
crc = 0x00000000; /* Note, initial value is 0x00000000 not 0xffffffff */
while (data_len != 0){
byte = GET_U_1(p);
p++;
/* Reverse bits on input */
byte = ieee802_15_4_reverse32(byte);
/* Update CRC */
for(b = 0; b <= 7; b++) {
if ((int) (crc ^ byte) < 0)
crc = (crc << 1) ^ 0x04C11DB7;
else
crc = crc << 1;
byte = byte << 1;
}
data_len--;
}
/* Reverse bits on output */
crc = ieee802_15_4_reverse32(crc);
return crc;
}
/*
* Find out the address length based on the address type. See table 7-3 of
* 802.15.4-2015. Returns the address length.
*/
static int
ieee802_15_4_addr_len(uint16_t addr_type)
{
switch (addr_type) {
case FC_ADDRESSING_MODE_NONE: /* None. */
return 0;
break;
case FC_ADDRESSING_MODE_RESERVED: /* Reserved, there used to be 8-bit
* address type in one amendment, but
* that and the feature using it was
* removed during 802.15.4-2015
* maintenance process. */
return -1;
break;
case FC_ADDRESSING_MODE_SHORT: /* Short. */
return 2;
break;
case FC_ADDRESSING_MODE_LONG: /* Extended. */
return 8;
break;
}
return 0;
}
/*
* Print out the ieee 802.15.4 address.
*/
static void
ieee802_15_4_print_addr(netdissect_options *ndo, const u_char *p,
int dst_addr_len)
{
switch (dst_addr_len) {
case 0:
ND_PRINT("none");
break;
case 2:
ND_PRINT("%04x", GET_LE_U_2(p));
break;
case 8:
ND_PRINT("%s", GET_LE64ADDR_STRING(p));
break;
}
return;
}
/*
* Beacon frame superframe specification structure. Used in the old Beacon
* frames, and in the DSME PAN Descriptor IE. See section 7.3.1.3 of the
* 802.15.4-2015.
*/
static void
ieee802_15_4_print_superframe_specification(netdissect_options *ndo,
uint16_t ss)
{
if (ndo->ndo_vflag < 1) {
return;
}
ND_PRINT("\n\tBeacon order = %d, Superframe order = %d, ",
(ss & 0xf), ((ss >> 4) & 0xf));
ND_PRINT("Final CAP Slot = %d",
((ss >> 8) & 0xf));
if (CHECK_BIT(ss, 12)) { ND_PRINT(", BLE enabled"); }
if (CHECK_BIT(ss, 14)) { ND_PRINT(", PAN Coordinator"); }
if (CHECK_BIT(ss, 15)) { ND_PRINT(", Assocation Permit"); }
}
/*
* Beacon frame gts info structure. Used in the old Beacon frames, and
* in the DSME PAN Descriptor IE. See section 7.3.1.4 of 802.15.4-2015.
*
* Returns number of byts consumed from the packet or -1 in case of error.
*/
static int
ieee802_15_4_print_gts_info(netdissect_options *ndo,
const u_char *p,
u_int data_len)
{
uint8_t gts_spec, gts_cnt;
u_int len;
int i;
gts_spec = GET_U_1(p);
gts_cnt = gts_spec & 0x7;
if (gts_cnt == 0) {
if (ndo->ndo_vflag > 0) {
ND_PRINT("\n\tGTS Descriptor Count = %d, ", gts_cnt);
}
return 1;
}
len = 1 + 1 + gts_cnt * 3;
if (data_len < len) {
ND_PRINT(" [ERROR: Truncated GTS Info List]");
return -1;
}
if (ndo->ndo_vflag < 2) {
return len;
}
ND_PRINT("GTS Descriptor Count = %d, ", gts_cnt);
ND_PRINT("GTS Directions Mask = %02x, [ ",
GET_U_1(p + 1) & 0x7f);
for(i = 0; i < gts_cnt; i++) {
ND_PRINT("[ ");
ieee802_15_4_print_addr(ndo, p + 2 + i * 3, 2);
ND_PRINT(", Start slot = %d, Length = %d ] ",
GET_U_1(p + 2 + i * 3 + 1) & 0x0f,
(GET_U_1(p + 2 + i * 3 + 1) >> 4) & 0x0f);
}
ND_PRINT("]");
return len;
}
/*
* Beacon frame pending address structure. Used in the old Beacon frames, and
* in the DSME PAN Descriptor IE. See section 7.3.1.5 of 802.15.4-2015.
*
* Returns number of byts consumed from the packet or -1 in case of error.
*/
static int16_t
ieee802_15_4_print_pending_addresses(netdissect_options *ndo,
const u_char *p,
u_int data_len)
{
uint8_t pas, s_cnt, e_cnt, len, i;
pas = GET_U_1(p);
s_cnt = pas & 0x7;
e_cnt = (pas >> 4) & 0x7;
len = 1 + s_cnt * 2 + e_cnt * 8;
if (ndo->ndo_vflag > 0) {
ND_PRINT("\n\tPending address list, "
"# short addresses = %d, # extended addresses = %d",
s_cnt, e_cnt);
}
if (data_len < len) {
ND_PRINT(" [ERROR: Pending address list truncated]");
return -1;
}
if (ndo->ndo_vflag < 2) {
return len;
}
if (s_cnt != 0) {
ND_PRINT(", Short address list = [ ");
for(i = 0; i < s_cnt; i++) {
ieee802_15_4_print_addr(ndo, p + 1 + i * 2, 2);
ND_PRINT(" ");
}
ND_PRINT("]");
}
if (e_cnt != 0) {
ND_PRINT(", Extended address list = [ ");
for(i = 0; i < e_cnt; i++) {
ieee802_15_4_print_addr(ndo, p + 1 + s_cnt * 2 +
i * 8, 8);
ND_PRINT(" ");
}
ND_PRINT("]");
}
return len;
}
/*
* Print header ie content.
*/
static void
ieee802_15_4_print_header_ie(netdissect_options *ndo,
const u_char *p,
uint16_t ie_len,
int element_id)
{
int i;
switch (element_id) {
case 0x00: /* Vendor Specific Header IE */
if (ie_len < 3) {
ND_PRINT("[ERROR: Vendor OUI missing]");
} else {
ND_PRINT("OUI = 0x%02x%02x%02x, ", GET_U_1(p),
GET_U_1(p + 1), GET_U_1(p + 2));
ND_PRINT("Data = ");
for(i = 3; i < ie_len; i++) {
ND_PRINT("%02x ", GET_U_1(p + i));
}
}
break;
case 0x1a: /* LE CSL IE */
if (ie_len < 4) {
ND_PRINT("[ERROR: Truncated CSL IE]");
} else {
ND_PRINT("CSL Phase = %d, CSL Period = %d",
GET_LE_U_2(p), GET_LE_U_2(p + 2));
if (ie_len >= 6) {
ND_PRINT(", Rendezvous time = %d",
GET_LE_U_2(p + 4));
}
if (ie_len != 4 && ie_len != 6) {
ND_PRINT(" [ERROR: CSL IE length wrong]");
}
}
break;
case 0x1b: /* LE RIT IE */
if (ie_len < 4) {
ND_PRINT("[ERROR: Truncated RIT IE]");
} else {
ND_PRINT("Time to First Listen = %d, # of Repeat Listen = %d, Repeat Listen Interval = %d",
GET_U_1(p),
GET_U_1(p + 1),
GET_LE_U_2(p + 2));
}
break;
case 0x1c: /* DSME PAN Descriptor IE */
/*FALLTHROUGH*/
case 0x21: /* Extended DSME PAN descriptior IE */
if (ie_len < 2) {
ND_PRINT("[ERROR: Truncated DSME PAN IE]");
} else {
uint16_t ss, ptr, ulen;
int16_t len;
int hopping_present;
hopping_present = 0;
ss = GET_LE_U_2(p);
ieee802_15_4_print_superframe_specification(ndo, ss);
if (ie_len < 3) {
ND_PRINT("[ERROR: Truncated before pending addresses field]");
break;
}
ptr = 2;
len = ieee802_15_4_print_pending_addresses(ndo,
p + ptr,
ie_len -
ptr);
if (len < 0) {
break;
}
ptr += len;
if (element_id == 0x21) {
/* Extended version. */
if (ie_len < ptr + 2) {
ND_PRINT("[ERROR: Truncated before DSME Superframe Specification]");
break;
}
ss = GET_LE_U_2(p + ptr);
ptr += 2;
ND_PRINT("Multi-superframe Order = %d", ss & 0xff);
ND_PRINT(", %s", ((ss & 0x100) ?
"Channel hopping mode" :
"Channel adaptation mode"));
if (ss & 0x400) {
ND_PRINT(", CAP reduction enabled");
}
if (ss & 0x800) {
ND_PRINT(", Deferred beacon enabled");
}
if (ss & 0x1000) {
ND_PRINT(", Hopping Sequence Present");
hopping_present = 1;
}
} else {
if (ie_len < ptr + 1) {
ND_PRINT("[ERROR: Truncated before DSME Superframe Specification]");
break;
}
ss = GET_U_1(p + ptr);
ptr++;
ND_PRINT("Multi-superframe Order = %d",
ss & 0x0f);
ND_PRINT(", %s", ((ss & 0x10) ?
"Channel hopping mode" :
"Channel adaptation mode"));
if (ss & 0x40) {
ND_PRINT(", CAP reduction enabled");
}
if (ss & 0x80) {
ND_PRINT(", Deferred beacon enabled");
}
}
if (ie_len < ptr + 8) {
ND_PRINT(" [ERROR: Truncated before Time syncronization specification]");
break;
}
ND_PRINT("Beacon timestamp = %" PRIu64 ", offset = %d",
GET_LE_U_6(p + ptr),
GET_LE_U_2(p + ptr + 6));
ptr += 8;
if (ie_len < ptr + 4) {
ND_PRINT(" [ERROR: Truncated before Beacon Bitmap]");
break;
}
ulen = GET_LE_U_2(p + ptr + 2);
ND_PRINT("SD Index = %d, Bitmap len = %d, ",
GET_LE_U_2(p + ptr), ulen);
ptr += 4;
if (ie_len < ptr + ulen) {
ND_PRINT(" [ERROR: Truncated in SD bitmap]");
break;
}
ND_PRINT(" SD Bitmap = ");
for(i = 0; i < ulen; i++) {
ND_PRINT("%02x ", GET_U_1(p + ptr + i));
}
ptr += ulen;
if (ie_len < ptr + 5) {
ND_PRINT(" [ERROR: Truncated before Channel hopping specification]");
break;
}
ulen = GET_LE_U_2(p + ptr + 4);
ND_PRINT("Hopping Seq ID = %d, PAN Coordinator BSN = %d, "
"Channel offset = %d, Bitmap length = %d, ",
GET_U_1(p + ptr),
GET_U_1(p + ptr + 1),
GET_LE_U_2(p + ptr + 2),
ulen);
ptr += 5;
if (ie_len < ptr + ulen) {
ND_PRINT(" [ERROR: Truncated in Channel offset bitmap]");
break;
}
ND_PRINT(" Channel offset bitmap = ");
for(i = 0; i < ulen; i++) {
ND_PRINT("%02x ", GET_U_1(p + ptr + i));
}
ptr += ulen;
if (hopping_present) {
if (ie_len < ptr + 1) {
ND_PRINT(" [ERROR: Truncated in Hopping Sequence length]");
break;
}
ulen = GET_U_1(p + ptr);
ptr++;
ND_PRINT("Hopping Seq length = %d [ ", ulen);
/* The specification is not clear how the
hopping sequence is encoded, I assume two
octet unsigned integers for each channel. */
if (ie_len < ptr + ulen * 2) {
ND_PRINT(" [ERROR: Truncated in Channel offset bitmap]");
break;
}
for(i = 0; i < ulen; i++) {
ND_PRINT("%02x ",
GET_LE_U_2(p + ptr + i * 2));
}
ND_PRINT("]");
ptr += ulen * 2;
}
}
break;
case 0x1d: /* Rendezvous Tome IE */
if (ie_len != 4) {
ND_PRINT("[ERROR: Length != 2]");
} else {
uint16_t r_time, w_u_interval;
r_time = GET_LE_U_2(p);
w_u_interval = GET_LE_U_2(p + 2);
ND_PRINT("Rendezvous time = %d, Wake-up Interval = %d",
r_time, w_u_interval);
}
break;
case 0x1e: /* Time correction IE */
if (ie_len != 2) {
ND_PRINT("[ERROR: Length != 2]");
} else {
uint16_t val;
int16_t timecorr;
val = GET_LE_U_2(p);
if (val & 0x8000) { ND_PRINT("Negative "); }
val &= 0xfff;
val <<= 4;
timecorr = val;
timecorr >>= 4;
ND_PRINT("Ack time correction = %d, ", timecorr);
}
break;
case 0x22: /* Frament Sequence Content Description IE */
/* XXX Not implemented */
case 0x23: /* Simplified Superframe Specification IE */
/* XXX Not implemented */
case 0x24: /* Simplified GTS Specification IE */
/* XXX Not implemented */
case 0x25: /* LECIM Capabilities IE */
/* XXX Not implemented */
case 0x26: /* TRLE Descriptor IE */
/* XXX Not implemented */
case 0x27: /* RCC Capabilities IE */
/* XXX Not implemented */
case 0x28: /* RCCN Descriptor IE */
/* XXX Not implemented */
case 0x29: /* Global Time IE */
/* XXX Not implemented */
case 0x2b: /* DA IE */
/* XXX Not implemented */
default:
ND_PRINT("IE Data = ");
for(i = 0; i < ie_len; i++) {
ND_PRINT("%02x ", GET_U_1(p + i));
}
break;
}
}
/*
* Parse and print Header IE list. See 7.4.2 of 802.15.4-2015 for
* more information.
*
* Returns number of byts consumed from the packet or -1 in case of error.
*/
static int
ieee802_15_4_print_header_ie_list(netdissect_options *ndo,
const u_char *p,
u_int caplen,
int *payload_ie_present)
{
int len, ie, element_id, i;
uint16_t ie_len;
*payload_ie_present = 0;
len = 0;
do {
if (caplen < 2) {
ND_PRINT("[ERROR: Truncated header IE]");
return -1;
}
/* Extract IE Header */
ie = GET_LE_U_2(p);
if (CHECK_BIT(ie, 15)) {
ND_PRINT("[ERROR: Header IE with type 1] ");
}
/* Get length and Element ID */
ie_len = ie & 0x7f;
element_id = (ie >> 7) & 0xff;
if (element_id > 127) {
ND_PRINT("Reserved Element ID %02x, length = %d ",
element_id, ie_len);
} else {
if (ie_len == 0) {
ND_PRINT("\n\t%s [", h_ie_names[element_id]);
} else {
ND_PRINT("\n\t%s [ length = %d, ",
h_ie_names[element_id], ie_len);
}
}
if (caplen < ie_len) {
ND_PRINT("[ERROR: Truncated IE data]");
return -1;
}
/* Skip header */
p += 2;
/* Parse and print content. */
if (ndo->ndo_vflag > 3 && ie_len != 0) {
ieee802_15_4_print_header_ie(ndo, p,
ie_len, element_id);
} else {
if (ie_len != 0) {
ND_PRINT("IE Data = ");
for(i = 0; i < ie_len; i++) {
ND_PRINT("%02x ", GET_U_1(p + i));
}
}
}
ND_PRINT("] ");
len += 2 + ie_len;
p += ie_len;
caplen -= 2 + ie_len;
if (element_id == 0x7e) {
*payload_ie_present = 1;
break;
}
if (element_id == 0x7f) {
break;
}
} while (caplen > 0);
return len;
}
/*
* Print MLME ie content.
*/
static void
ieee802_15_4_print_mlme_ie(netdissect_options *ndo,