diff options
Diffstat (limited to 'print-802_15_4.c')
| -rw-r--r-- | print-802_15_4.c | 2556 |
1 files changed, 2556 insertions, 0 deletions
diff --git a/print-802_15_4.c b/print-802_15_4.c new file mode 100644 index 0000000..1895be7 --- /dev/null +++ b/print-802_15_4.c @@ -0,0 +1,2556 @@ +/* + * Copyright (c) 2009 + * Siemens AG, All rights reserved. + * Dmitry Eremin-Solenikov (dbaryshkov@gmail.com) + * + * 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" + +#define ND_LONGJMP_FROM_TCHECK +#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 Specification 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 section 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 section 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; + } +} + +/* + * 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(", Association 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 descriptor 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 synchronization 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: /* Fragment 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 < 2U + 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, + const u_char *p, + uint16_t sub_ie_len, + int sub_id) +{ + int i, j; + uint16_t len; + + /* Note, as there is no overlap with the long and short + MLME sub IDs, we can just use one switch here. */ + switch (sub_id) { + case 0x08: /* Vendor Specific Nested IE */ + if (sub_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 < sub_ie_len; i++) { + ND_PRINT("%02x ", GET_U_1(p + i)); + } + } + break; + case 0x09: /* Channel Hopping IE */ + if (sub_ie_len < 1) { + ND_PRINT("[ERROR: Hopping sequence ID missing]"); + } else if (sub_ie_len == 1) { + ND_PRINT("Hopping Sequence ID = %d", GET_U_1(p)); + p++; + sub_ie_len--; + } else { + uint16_t channel_page, number_of_channels; + + ND_PRINT("Hopping Sequence ID = %d", GET_U_1(p)); + p++; + sub_ie_len--; + if (sub_ie_len < 7) { + ND_PRINT("[ERROR: IE truncated]"); + break; + } + channel_page = GET_U_1(p); + number_of_channels = GET_LE_U_2(p + 1); + ND_PRINT("Channel Page = %d, Number of Channels = %d, ", + channel_page, number_of_channels); + ND_PRINT("Phy Configuration = 0x%08x, ", + GET_LE_U_4(p + 3)); + p += 7; + sub_ie_len -= 7; + if (channel_page == 9 || channel_page == 10) { + len = (number_of_channels + 7) / 8; + if (sub_ie_len < len) { + ND_PRINT("[ERROR: IE truncated]"); + break; + } + ND_PRINT("Extended bitmap = 0x"); + for(i = 0; i < len; i++) { + ND_PRINT("%02x", GET_U_1(p + i)); + } + ND_PRINT(", "); + p += len; + sub_ie_len -= len; + } + if (sub_ie_len < 2) { + ND_PRINT("[ERROR: IE truncated]"); + break; + } + len = GET_LE_U_2(p); + p += 2; + sub_ie_len -= 2; + ND_PRINT("Hopping Seq length = %d [ ", len); + + if (sub_ie_len < len * 2) { + ND_PRINT(" [ERROR: IE truncated]"); + break; + } + for(i = 0; i < len; i++) { + ND_PRINT("%02x ", GET_LE_U_2(p + i * 2)); + } + ND_PRINT("]"); + p += len * 2; + sub_ie_len -= len * 2; + if (sub_ie_len < 2) { + ND_PRINT("[ERROR: IE truncated]"); + break; + } + ND_PRINT("Current hop = %d", GET_LE_U_2(p)); + } + + break; + case 0x1a: /* TSCH Synchronization IE. */ + if (sub_ie_len < 6) { + ND_PRINT("[ERROR: Length != 6]"); + } + ND_PRINT("ASN = %010" PRIx64 ", Join Metric = %d ", + GET_LE_U_5(p), GET_U_1(p + 5)); + break; + case 0x1b: /* TSCH Slotframe and Link IE. */ + { + int sf_num, off, links, opts; + + if (sub_ie_len < 1) { + ND_PRINT("[ERROR: Truncated IE]"); + break; + } + sf_num = GET_U_1(p); + ND_PRINT("Slotframes = %d ", sf_num); + off = 1; + for(i = 0; i < sf_num; i++) { + if (sub_ie_len < off + 4) { + ND_PRINT("[ERROR: Truncated IE before slotframes]"); + break; + } + links = GET_U_1(p + off + 3); + ND_PRINT("\n\t\t\t[ Handle %d, size = %d, links = %d ", + GET_U_1(p + off), + GET_LE_U_2(p + off + 1), + links); + off += 4; + for(j = 0; j < links; j++) { + if (sub_ie_len < off + 5) { + ND_PRINT("[ERROR: Truncated IE links]"); + break; + } + opts = GET_U_1(p + off + 4); + ND_PRINT("\n\t\t\t\t[ Timeslot = %d, Offset = %d, Options = ", + GET_LE_U_2(p + off), + GET_LE_U_2(p + off + 2)); + if (opts & 0x1) { ND_PRINT("TX "); } + if (opts & 0x2) { ND_PRINT("RX "); } + if (opts & 0x4) { ND_PRINT("Shared "); } + if (opts & 0x8) { + ND_PRINT("Timekeeping "); + } + if (opts & 0x10) { + ND_PRINT("Priority "); + } + off += 5; + ND_PRINT("] "); + } + ND_PRINT("] "); + } + } + break; + case 0x1c: /* TSCH Timeslot IE. */ + if (sub_ie_len == 1) { + ND_PRINT("Time slot ID = %d ", GET_U_1(p)); + } else if (sub_ie_len == 25) { + ND_PRINT("Time slot ID = %d, CCA Offset = %d, CCA = %d, TX Offset = %d, RX Offset = %d, RX Ack Delay = %d, TX Ack Delay = %d, RX Wait = %d, Ack Wait = %d, RX TX = %d, Max Ack = %d, Max TX = %d, Time slot Length = %d ", + GET_U_1(p), + GET_LE_U_2(p + 1), + GET_LE_U_2(p + 3), + GET_LE_U_2(p + 5), + GET_LE_U_2(p + 7), + GET_LE_U_2(p + 9), + GET_LE_U_2(p + 11), + GET_LE_U_2(p + 13), + GET_LE_U_2(p + 15), + GET_LE_U_2(p + 17), + GET_LE_U_2(p + 19), + GET_LE_U_2(p + 21), + GET_LE_U_2(p + 23)); + } else if (sub_ie_len == 27) { + ND_PRINT("Time slot ID = %d, CCA Offset = %d, CCA = %d, TX Offset = %d, RX Offset = %d, RX Ack Delay = %d, TX Ack Delay = %d, RX Wait = %d, Ack Wait = %d, RX TX = %d, Max Ack = %d, Max TX = %d, Time slot Length = %d ", + GET_U_1(p), + GET_LE_U_2(p + 1), + GET_LE_U_2(p + 3), + GET_LE_U_2(p + 5), + GET_LE_U_2(p + 7), + GET_LE_U_2(p + 9), + GET_LE_U_2(p + 11), + GET_LE_U_2(p + 13), + GET_LE_U_2(p + 15), + GET_LE_U_2(p + 17), + GET_LE_U_2(p + 19), + GET_LE_U_3(p + 21), + GET_LE_U_3(p + 24)); + } else { + ND_PRINT("[ERROR: Length not 1, 25, or 27]"); + ND_PRINT("\n\t\t\tIE Data = "); + for(i = 0; i < sub_ie_len; i++) { + ND_PRINT("%02x ", GET_U_1(p + i)); + } + } + break; + case 0x1d: /* Hopping timing IE */ + /* XXX Not implemented */ + case 0x1e: /* Enhanced Beacon Filter IE */ + /* XXX Not implemented */ + case 0x1f: /* MAC Metrics IE */ + /* XXX Not implemented */ + case 0x20: /* All MAC Metrics IE */ + /* XXX Not implemented */ + case 0x21: /* Coexistence Specification IE */ + /* XXX Not implemented */ + case 0x22: /* SUN Device Capabilities IE */ + /* XXX Not implemented */ + case 0x23: /* SUN FSK Generic PHY IE */ + /* XXX Not implemented */ + case 0x24: /* Mode Switch Parameter IE */ + /* XXX Not implemented */ + case 0x25: /* PHY Parameter Change IE */ + /* XXX Not implemented */ + case 0x26: /* O-QPSK PHY Mode IE */ + /* XXX Not implemented */ + case 0x27: /* PCA Allocation IE */ + /* XXX Not implemented */ + case 0x28: /* LECIM DSSS Operating Mode IE */ + /* XXX Not implemented */ + case 0x29: /* LECIM FSK Operating Mode IE */ + /* XXX Not implemented */ + case 0x2b: /* TVWS PHY Operating Mode Description IE */ + /* XXX Not implemented */ + case 0x2c: /* TVWS Device Capabilities IE */ + /* XXX Not implemented */ + case 0x2d: /* TVWS Device Category IE */ + /* XXX Not implemented */ + case 0x2e: /* TVWS Device Identification IE */ + /* XXX Not implemented */ + case 0x2f: /* TVWS Device Location IE */ + /* XXX Not implemented */ + case 0x30: /* TVWS Channel Information Query IE */ + /* XXX Not implemented */ + case 0x31: /* TVWS Channel Information Source IE */ + /* XXX Not implemented */ + case 0x32: /* CTM IE */ + /* XXX Not implemented */ + case 0x33: /* Timestamp IE */ + /* XXX Not implemented */ + case 0x34: /* Timestamp Difference IE */ + /* XXX Not implemented */ + case 0x35: /* TMCTP Specification IE */ + /* XXX Not implemented */ + case 0x36: /* TCC PHY Operating Mode IE */ + /* XXX Not implemented */ + default: + ND_PRINT("IE Data = "); + for(i = 0; i < sub_ie_len; i++) { + ND_PRINT("%02x ", GET_U_1(p + i)); + } + break; + } +} + +/* + * MLME IE list parsing and printing. See 7.4.3.2 of 802.15.4-2015 + * for more information. + */ +static void +ieee802_15_4_print_mlme_ie_list(netdissect_options *ndo, + const u_char *p, + uint16_t ie_len) +{ + int ie, sub_id, i, type; + uint16_t sub_ie_len; + + do { + if (ie_len < 2) { + ND_PRINT("[ERROR: Truncated MLME IE]"); + return; + } + /* Extract IE header */ + ie = GET_LE_U_2(p); + type = CHECK_BIT(ie, 15); + if (type) { + /* Long type */ + sub_ie_len = ie & 0x3ff; + sub_id = (ie >> 11) & 0x0f; + } else { + sub_ie_len = ie & 0xff; + sub_id = (ie >> 8) & 0x7f; + } + + /* Skip the IE header */ + p += 2; + + if (type == 0) { + ND_PRINT("\n\t\t%s [ length = %d, ", + p_mlme_short_names[sub_id], sub_ie_len); + } else { + ND_PRINT("\n\t\t%s [ length = %d, ", + p_mlme_long_names[sub_id], sub_ie_len); + } + + if (ie_len < 2 + sub_ie_len) { + ND_PRINT("[ERROR: Truncated IE data]"); + return; + } + if (sub_ie_len != 0) { + if (ndo->ndo_vflag > 3) { + ieee802_15_4_print_mlme_ie(ndo, p, sub_ie_len, sub_id); + } else if (ndo->ndo_vflag > 2) { + ND_PRINT("IE Data = "); + for(i = 0; i < sub_ie_len; i++) { + ND_PRINT("%02x ", GET_U_1(p + i)); + } + } + } + ND_PRINT("] "); + p += sub_ie_len; + ie_len -= 2 + sub_ie_len; + } while (ie_len > 0); +} + +/* + * Multiplexd IE (802.15.9) parsing and printing. + * + * Returns number of bytes consumed from packet or -1 in case of error. + */ +static void +ieee802_15_4_print_mpx_ie(netdissect_options *ndo, + const u_char *p, + uint16_t ie_len) +{ + int transfer_type, tid; + int fragment_number, data_start; + int i; + + data_start = 0; + if (ie_len < 1) { + ND_PRINT("[ERROR: Transaction control byte missing]"); + return; + } + + transfer_type = GET_U_1(p) & 0x7; + tid = GET_U_1(p) >> 3; + switch (transfer_type) { + case 0x00: /* Full upper layer frame. */ + case 0x01: /* Full upper layer frame with small Multiplex ID. */ + ND_PRINT("Type = Full upper layer fragment%s, ", + (transfer_type == 0x01 ? + " with small Multiplex ID" : "")); + if (transfer_type == 0x00) { + if (ie_len < 3) { + ND_PRINT("[ERROR: Multiplex ID missing]"); + return; + } + data_start = 3; + ND_PRINT("tid = 0x%02x, Multiplex ID = 0x%04x, ", + tid, GET_LE_U_2(p + 1)); + } else { + data_start = 1; + ND_PRINT("Multiplex ID = 0x%04x, ", tid); + } + break; + case 0x02: /* First, or middle, Fragments */ + case 0x04: /* Last fragment */ + if (ie_len < 2) { + ND_PRINT("[ERROR: fragment number missing]"); + return; + } + + fragment_number = GET_U_1(p + 1); + ND_PRINT("Type = %s, tid = 0x%02x, fragment = 0x%02x, ", + (transfer_type == 0x02 ? + (fragment_number == 0 ? + "First fragment" : "Middle fragment") : + "Last fragment"), tid, + fragment_number); + data_start = 2; + if (fragment_number == 0) { + int total_size, multiplex_id; + + if (ie_len < 6) { + ND_PRINT("[ERROR: Total upper layer size or multiplex ID missing]"); + return; + } + total_size = GET_LE_U_2(p + 2); + multiplex_id = GET_LE_U_2(p + 4); + ND_PRINT("Total upper layer size = 0x%04x, Multiplex ID = 0x%04x, ", + total_size, multiplex_id); + data_start = 6; + } + break; + case 0x06: /* Abort code */ + if (ie_len == 1) { + ND_PRINT("Type = Abort, tid = 0x%02x, no max size given", + tid); + } else if (ie_len == 3) { + ND_PRINT("Type = Abort, tid = 0x%02x, max size = 0x%04x", + tid, GET_LE_U_2(p + 1)); + } else { + ND_PRINT("Type = Abort, tid = 0x%02x, invalid length = %d (not 1 or 3)", + tid, ie_len); + ND_PRINT("Abort data = "); + for(i = 1; i < ie_len; i++) { + ND_PRINT("%02x ", GET_U_1(p + i)); + } + } + return; + /* NOTREACHED */ + break; + case 0x03: /* Reserved */ + case 0x05: /* Reserved */ + case 0x07: /* Reserved */ + ND_PRINT("Type = %d (Reserved), tid = 0x%02x, ", + transfer_type, tid); + data_start = 1; + break; + } + + ND_PRINT("Upper layer data = "); + for(i = data_start; i < ie_len; i++) { + ND_PRINT("%02x ", GET_U_1(p + i)); + } +} + +/* + * Payload IE list parsing and printing. See 7.4.3 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_payload_ie_list(netdissect_options *ndo, + const u_char *p, + u_int caplen) +{ + int len, ie, group_id, i; + uint16_t ie_len; + + 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)) == 0) { + ND_PRINT("[ERROR: Payload IE with type 0] "); + } + ie_len = ie & 0x3ff; + group_id = (ie >> 11) & 0x0f; + + /* Skip the IE header */ + p += 2; + if (ie_len == 0) { + ND_PRINT("\n\t%s [", p_ie_names[group_id]); + } else { + ND_PRINT("\n\t%s [ length = %d, ", + p_ie_names[group_id], ie_len); + } + if (caplen < 2U + ie_len) { + ND_PRINT("[ERROR: Truncated IE data]"); + return -1; + } + if (ndo->ndo_vflag > 3 && ie_len != 0) { + switch (group_id) { + case 0x1: /* MLME IE */ + ieee802_15_4_print_mlme_ie_list(ndo, p, ie_len); + break; + case 0x2: /* Vendor Specific Nested 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 0x3: /* Multiplexed IE (802.15.9) */ + ieee802_15_4_print_mpx_ie(ndo, p, ie_len); + break; + case 0x5: /* IETF IE */ + if (ie_len < 1) { + ND_PRINT("[ERROR: Subtype ID missing]"); + } else { + ND_PRINT("Subtype ID = 0x%02x, Subtype content = ", + GET_U_1(p)); + for(i = 1; i < ie_len; i++) { + ND_PRINT("%02x ", + GET_U_1(p + i)); + } + } + break; + default: + ND_PRINT("IE Data = "); + for(i = 0; i < ie_len; i++) { + ND_PRINT("%02x ", GET_U_1(p + i)); + } + break; + } + } 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("]\n\t"); + len += 2 + ie_len; + p += ie_len; + caplen -= 2 + ie_len; + if (group_id == 0xf) { + break; + } + } while (caplen > 0); + return len; +} + +/* + * Parse and print auxiliary security header. + * + * Returns number of byts consumed from the packet or -1 in case of error. + */ +static int +ieee802_15_4_print_aux_sec_header(netdissect_options *ndo, + const u_char *p, + u_int caplen, + int *security_level) +{ + int sc, key_id_mode, len; + + if (caplen < 1) { + ND_PRINT("[ERROR: Truncated before Aux Security Header]"); + return -1; + } + sc = GET_U_1(p); + len = 1; + *security_level = sc & 0x7; + key_id_mode = (sc >> 3) & 0x3; + + caplen -= 1; + p += 1; + + if (ndo->ndo_vflag > 0) { + ND_PRINT("\n\tSecurity Level %d, Key Id Mode %d, ", + *security_level, key_id_mode); + } + if ((CHECK_BIT(sc, 5)) == 0) { + if (caplen < 4) { + ND_PRINT("[ERROR: Truncated before Frame Counter]"); + return -1; + } + if (ndo->ndo_vflag > 1) { + ND_PRINT("Frame Counter 0x%08x ", + GET_LE_U_4(p)); + } + p += 4; + caplen -= 4; + len += 4; + } + switch (key_id_mode) { + case 0x00: /* Implicit. */ + if (ndo->ndo_vflag > 1) { + ND_PRINT("Implicit"); + } + return len; + break; + case 0x01: /* Key Index, nothing to print here. */ + break; + case 0x02: /* PAN and Short address Key Source, and Key Index. */ + if (caplen < 4) { + ND_PRINT("[ERROR: Truncated before Key Source]"); + return -1; + } + if (ndo->ndo_vflag > 1) { + ND_PRINT("KeySource 0x%04x:%0x4x, ", + GET_LE_U_2(p), GET_LE_U_2(p + 2)); + } + p += 4; + caplen -= 4; + len += 4; + break; + case 0x03: /* Extended address and Key Index. */ + if (caplen < 8) { + ND_PRINT("[ERROR: Truncated before Key Source]"); + return -1; + } + if (ndo->ndo_vflag > 1) { + ND_PRINT("KeySource %s, ", GET_LE64ADDR_STRING(p)); + } + p += 4; + caplen -= 4; + len += 4; + break; + } + if (caplen < 1) { + ND_PRINT("[ERROR: Truncated before Key Index]"); + return -1; + } + if (ndo->ndo_vflag > 1) { + ND_PRINT("KeyIndex 0x%02x, ", GET_U_1(p)); + } + caplen -= 1; + p += 1; + len += 1; + return len; +} + +/* + * Print command data. + * + * Returns number of byts consumed from the packet or -1 in case of error. + */ +static int +ieee802_15_4_print_command_data(netdissect_options *ndo, + uint8_t command_id, + const u_char *p, + u_int caplen) +{ + u_int i; + + switch (command_id) { + case 0x01: /* Association Request */ + if (caplen != 1) { + ND_PRINT("Invalid Association request command length"); + return -1; + } else { + uint8_t cap_info; + cap_info = GET_U_1(p); + ND_PRINT("%s%s%s%s%s%s", + ((cap_info & 0x02) ? + "FFD, " : "RFD, "), + ((cap_info & 0x04) ? + "AC powered, " : ""), + ((cap_info & 0x08) ? + "Receiver on when idle, " : ""), + ((cap_info & 0x10) ? + "Fast association, " : ""), + ((cap_info & 0x40) ? + "Security supported, " : ""), + ((cap_info & 0x80) ? + "Allocate address, " : "")); + return caplen; + } + break; + case 0x02: /* Association Response */ + if (caplen != 3) { + ND_PRINT("Invalid Association response command length"); + return -1; + } else { + ND_PRINT("Short address = "); + ieee802_15_4_print_addr(ndo, p, 2); + switch (GET_U_1(p + 2)) { + case 0x00: + ND_PRINT(", Association successful"); + break; + case 0x01: + ND_PRINT(", PAN at capacity"); + break; + case 0x02: + ND_PRINT(", PAN access denied"); + break; + case 0x03: + ND_PRINT(", Hooping sequence offset duplication"); + break; + case 0x80: + ND_PRINT(", Fast association successful"); + break; + default: + ND_PRINT(", Status = 0x%02x", + GET_U_1(p + 2)); + break; + } + return caplen; + } + break; + case 0x03: /* Diassociation Notification command */ + if (caplen != 1) { + ND_PRINT("Invalid Disassociation Notification command length"); + return -1; + } else { + switch (GET_U_1(p)) { + case 0x00: + ND_PRINT("Reserved"); + break; + case 0x01: + ND_PRINT("Reason = The coordinator wishes the device to leave PAN"); + break; + case 0x02: + ND_PRINT("Reason = The device wishes to leave the PAN"); + break; + default: + ND_PRINT("Reason = 0x%02x", GET_U_1(p + 2)); + break; + } + return caplen; + } + + /* Following ones do not have any data. */ + case 0x04: /* Data Request command */ + case 0x05: /* PAN ID Conflict Notification command */ + case 0x06: /* Orphan Notification command */ + case 0x07: /* Beacon Request command */ + /* Should not have any data. */ + return 0; + case 0x08: /* Coordinator Realignment command */ + if (caplen < 7 || caplen > 8) { + ND_PRINT("Invalid Coordinator Realignment command length"); + return -1; + } else { + uint16_t channel, page; + + ND_PRINT("Pan ID = 0x%04x, Coordinator short address = ", + GET_LE_U_2(p)); + ieee802_15_4_print_addr(ndo, p + 2, 2); + channel = GET_U_1(p + 4); + + if (caplen == 8) { + page = GET_U_1(p + 7); + } else { + page = 0x80; + } + if (CHECK_BIT(page, 7)) { + /* No page present, instead we have msb of + channel in the page. */ + channel |= (page & 0x7f) << 8; + ND_PRINT(", Channel Number = %d", channel); + } else { + ND_PRINT(", Channel Number = %d, page = %d", + channel, page); + } + ND_PRINT(", Short address = "); + ieee802_15_4_print_addr(ndo, p + 5, 2); + return caplen; + } + break; + case 0x09: /* GTS Request command */ + if (caplen != 1) { + ND_PRINT("Invalid GTS Request command length"); + return -1; + } else { + uint8_t gts; + + gts = GET_U_1(p); + ND_PRINT("GTS Length = %d, %s, %s", + gts & 0xf, + (CHECK_BIT(gts, 4) ? + "Receive-only GTS" : "Transmit-only GTS"), + (CHECK_BIT(gts, 5) ? + "GTS allocation" : "GTS deallocations")); + return caplen; + } + break; + case 0x13: /* DSME Association Request command */ + /* XXX Not implemented */ + case 0x14: /* DSME Association Response command */ + /* XXX Not implemented */ + case 0x15: /* DSME GTS Request command */ + /* XXX Not implemented */ + case 0x16: /* DSME GTS Response command */ + /* XXX Not implemented */ + case 0x17: /* DSME GTS Notify command */ + /* XXX Not implemented */ + case 0x18: /* DSME Information Request command */ + /* XXX Not implemented */ + case 0x19: /* DSME Information Response command */ + /* XXX Not implemented */ + case 0x1a: /* DSME Beacon Allocation Notification command */ + /* XXX Not implemented */ + case 0x1b: /* DSME Beacon Collision Notification command */ + /* XXX Not implemented */ + case 0x1c: /* DSME Link Report command */ + /* XXX Not implemented */ + case 0x20: /* RIT Data Request command */ + /* XXX Not implemented */ + case 0x21: /* DBS Request command */ + /* XXX Not implemented */ + case 0x22: /* DBS Response command */ + /* XXX Not implemented */ + case 0x23: /* RIT Data Response command */ + /* XXX Not implemented */ + case 0x24: /* Vendor Specific command */ + /* XXX Not implemented */ + case 0x0a: /* TRLE Management Request command */ + /* XXX Not implemented */ + case 0x0b: /* TRLE Management Response command */ + /* XXX Not implemented */ + default: + ND_PRINT("Command Data = "); + for(i = 0; i < caplen; i++) { + ND_PRINT("%02x ", GET_U_1(p + i)); + } + break; + } + return 0; +} + +/* + * Parse and print frames following standard format. + * + * Returns FALSE in case of error. + */ +static u_int +ieee802_15_4_std_frames(netdissect_options *ndo, + const u_char *p, u_int caplen, + uint16_t fc) +{ + int len, frame_version, pan_id_comp; + int frame_type; + int src_pan, dst_pan, src_addr_len, dst_addr_len; + int security_level; + u_int miclen = 0; + int payload_ie_present; + uint8_t seq; + uint32_t fcs, crc_check; + const u_char *mic_start = NULL; + + payload_ie_present = 0; + + crc_check = 0; + /* Assume 2 octet FCS, the FCS length depends on the PHY, and we do not + know about that. */ + if (caplen < 4) { + /* Cannot have FCS, assume no FCS. */ + fcs = 0; + } else { + /* Test for 4 octet FCS. */ + fcs = GET_LE_U_4(p + caplen - 4); + crc_check = ieee802_15_4_crc32(ndo, p, caplen - 4); + if (crc_check == fcs) { + /* Remove FCS */ + caplen -= 4; + } else { + /* Test for 2 octet FCS. */ + fcs = GET_LE_U_2(p + caplen - 2); + crc_check = ieee802_15_4_crc16(ndo, p, caplen - 2); + if (crc_check == fcs) { + /* Remove FCS */ + caplen -= 2; + } else { + /* Wrong FCS, FCS might not be included in the + captured frame, do not remove it. */ + } + } + } + + /* Frame version. */ + frame_version = FC_FRAME_VERSION(fc); + frame_type = FC_FRAME_TYPE(fc); + ND_PRINT("v%d ", frame_version); + + if (ndo->ndo_vflag > 2) { + if (CHECK_BIT(fc, 3)) { ND_PRINT("Security Enabled, "); } + if (CHECK_BIT(fc, 4)) { ND_PRINT("Frame Pending, "); } + if (CHECK_BIT(fc, 5)) { ND_PRINT("AR, "); } + if (CHECK_BIT(fc, 6)) { ND_PRINT("PAN ID Compression, "); } + if (CHECK_BIT(fc, 8)) { ND_PRINT("Sequence Number Suppression, "); } + if (CHECK_BIT(fc, 9)) { ND_PRINT("IE present, "); } + } + + /* Check for the sequence number suppression. */ + if (CHECK_BIT(fc, 8)) { + /* Sequence number is suppressed. */ + if (frame_version < 2) { + /* Sequence number can only be suppressed for frame + version 2 or higher, this is invalid frame. */ + ND_PRINT("[ERROR: Sequence number suppressed on frames where version < 2]"); + } + if (ndo->ndo_vflag) + ND_PRINT("seq suppressed "); + if (caplen < 2) { + nd_print_trunc(ndo); + return 0; + } + p += 2; + caplen -= 2; + } else { + seq = GET_U_1(p + 2); + if (ndo->ndo_vflag) + ND_PRINT("seq %02x ", seq); + if (caplen < 3) { + nd_print_trunc(ndo); + return 0; + } + p += 3; + caplen -= 3; + } + + /* See which parts of addresses we have. */ + dst_addr_len = ieee802_15_4_addr_len((fc >> 10) & 0x3); + src_addr_len = ieee802_15_4_addr_len((fc >> 14) & 0x3); + if (src_addr_len < 0) { + ND_PRINT("[ERROR: Invalid src address mode]"); + return 0; + } + if (dst_addr_len < 0) { + ND_PRINT("[ERROR: Invalid dst address mode]"); + return 0; + } + src_pan = 0; + dst_pan = 0; + pan_id_comp = CHECK_BIT(fc, 6); + + /* The PAN ID Compression rules are complicated. */ + + /* First check old versions, where the rules are simple. */ + if (frame_version < 2) { + if (pan_id_comp) { + src_pan = 0; + dst_pan = 1; + if (dst_addr_len <= 0 || src_addr_len <= 0) { + /* Invalid frame, PAN ID Compression must be 0 + if only one address in the frame. */ + ND_PRINT("[ERROR: PAN ID Compression != 0, and only one address with frame version < 2]"); + } + } else { + src_pan = 1; + dst_pan = 1; + } + if (dst_addr_len <= 0) { + dst_pan = 0; + } + if (src_addr_len <= 0) { + src_pan = 0; + } + } else { + /* Frame version 2 rules are more complicated, and they depend + on the address modes of the frame, generic rules are same, + but then there are some special cases. */ + if (pan_id_comp) { + src_pan = 0; + dst_pan = 1; + } else { + src_pan = 1; + dst_pan = 1; + } + if (dst_addr_len <= 0) { + dst_pan = 0; + } + if (src_addr_len <= 0) { + src_pan = 0; + } + if (pan_id_comp) { + if (src_addr_len == 0 && + dst_addr_len == 0) { + /* Both addresses are missing, but PAN ID + compression set, special case we have + destination PAN but no addresses. */ + dst_pan = 1; + } else if ((src_addr_len == 0 && + dst_addr_len > 0) || + (src_addr_len > 0 && + dst_addr_len == 0)) { + /* Only one address present, and PAN ID + compression is set, we do not have PAN id at + all. */ + dst_pan = 0; + src_pan = 0; + } else if (src_addr_len == 8 && + dst_addr_len == 8) { + /* Both addresses are Extended, and PAN ID + compression set, we do not have PAN ID at + all. */ + dst_pan = 0; + src_pan = 0; + } + } else { + /* Special cases where PAN ID Compression is not set. */ + if (src_addr_len == 8 && + dst_addr_len == 8) { + /* Both addresses are Extended, and PAN ID + compression not set, we do have only one PAN + ID (destination). */ + dst_pan = 1; + src_pan = 0; + } +#ifdef BROKEN_6TISCH_PAN_ID_COMPRESSION + if (src_addr_len == 8 && + dst_addr_len == 2) { + /* Special case for the broken 6tisch + implementations. */ + src_pan = 0; + } +#endif /* BROKEN_6TISCH_PAN_ID_COMPRESSION */ + } + } + + /* Print dst PAN and address. */ + if (dst_pan) { + if (caplen < 2) { + ND_PRINT("[ERROR: Truncated before dst_pan]"); + return 0; + } + ND_PRINT("%04x:", GET_LE_U_2(p)); + p += 2; + caplen -= 2; + } else { + ND_PRINT("-:"); + } + if (caplen < (u_int) dst_addr_len) { + ND_PRINT("[ERROR: Truncated before dst_addr]"); + return 0; + } + ieee802_15_4_print_addr(ndo, p, dst_addr_len); + p += dst_addr_len; + caplen -= dst_addr_len; + + ND_PRINT(" < "); + + /* Print src PAN and address. */ + if (src_pan) { + if (caplen < 2) { + ND_PRINT("[ERROR: Truncated before dst_pan]"); + return 0; + } + ND_PRINT("%04x:", GET_LE_U_2(p)); + p += 2; + caplen -= 2; + } else { + ND_PRINT("-:"); + } + if (caplen < (u_int) src_addr_len) { + ND_PRINT("[ERROR: Truncated before dst_addr]"); + return 0; + } + ieee802_15_4_print_addr(ndo, p, src_addr_len); + ND_PRINT(" "); + p += src_addr_len; + caplen -= src_addr_len; + if (CHECK_BIT(fc, 3)) { + /* + * XXX - if frame_version is 0, this is the 2003 + * spec, and you don't have the auxiliary security + * header, you have a frame counter and key index + * for the AES-CTR and AES-CCM security suites but + * not for the AES-CBC-MAC security suite. + */ + len = ieee802_15_4_print_aux_sec_header(ndo, p, caplen, + &security_level); + if (len < 0) { + return 0; + } + ND_TCHECK_LEN(p, len); + p += len; + caplen -= len; + } else { + security_level = 0; + } + + switch (security_level) { + case 0: /*FALLTHOUGH */ + case 4: + miclen = 0; + break; + case 1: /*FALLTHOUGH */ + case 5: + miclen = 4; + break; + case 2: /*FALLTHOUGH */ + case 6: + miclen = 8; + break; + case 3: /*FALLTHOUGH */ + case 7: + miclen = 16; + break; + } + + /* Remove MIC */ + if (miclen != 0) { + if (caplen < miclen) { + ND_PRINT("[ERROR: Truncated before MIC]"); + return 0; + } + caplen -= miclen; + mic_start = p + caplen; + } + + /* Parse Information elements if present */ + if (CHECK_BIT(fc, 9)) { + /* Yes we have those. */ + len = ieee802_15_4_print_header_ie_list(ndo, p, caplen, + &payload_ie_present); + if (len < 0) { + return 0; + } + p += len; + caplen -= len; + } + + if (payload_ie_present) { + if (security_level >= 4) { + ND_PRINT("Payload IEs present, but encrypted, cannot print "); + } else { + len = ieee802_15_4_print_payload_ie_list(ndo, p, caplen); + if (len < 0) { + return 0; + } + p += len; + caplen -= len; + } + } + + /* Print MIC */ + if (ndo->ndo_vflag > 2 && miclen != 0) { + ND_PRINT("\n\tMIC "); + + for (u_int micoffset = 0; micoffset < miclen; micoffset++) { + ND_PRINT("%02x", GET_U_1(mic_start + micoffset)); + } + ND_PRINT(" "); + } + + /* Print FCS */ + if (ndo->ndo_vflag > 2) { + if (crc_check == fcs) { + ND_PRINT("FCS %x ", fcs); + } else { + ND_PRINT("wrong FCS %x vs %x (assume no FCS stored) ", + fcs, crc_check); + } + } + + /* Payload print */ + switch (frame_type) { + case 0x00: /* Beacon */ + if (frame_version < 2) { + if (caplen < 2) { + ND_PRINT("[ERROR: Truncated before beacon information]"); + break; + } else { + uint16_t ss; + + ss = GET_LE_U_2(p); + ieee802_15_4_print_superframe_specification(ndo, ss); + p += 2; + caplen -= 2; + + /* GTS */ + if (caplen < 1) { + ND_PRINT("[ERROR: Truncated before GTS info]"); + break; + } + + len = ieee802_15_4_print_gts_info(ndo, p, caplen); + if (len < 0) { + break; + } + + p += len; + caplen -= len; + + /* Pending Addresses */ + if (caplen < 1) { + ND_PRINT("[ERROR: Truncated before pending addresses]"); + break; + } + len = ieee802_15_4_print_pending_addresses(ndo, p, caplen); + if (len < 0) { + break; + } + ND_TCHECK_LEN(p, len); + p += len; + caplen -= len; + } + } + if (!ndo->ndo_suppress_default_print) + ND_DEFAULTPRINT(p, caplen); + + break; + case 0x01: /* Data */ + case 0x02: /* Acknowledgement */ + if (!ndo->ndo_suppress_default_print) + ND_DEFAULTPRINT(p, caplen); + break; + case 0x03: /* MAC Command */ + if (caplen < 1) { + ND_PRINT("[ERROR: Truncated before Command ID]"); + } else { + uint8_t command_id; + + command_id = GET_U_1(p); + if (command_id >= 0x30) { + ND_PRINT("Command ID = Reserved 0x%02x ", + command_id); + } else { + ND_PRINT("Command ID = %s ", + mac_c_names[command_id]); + } + p++; + caplen--; + if (caplen != 0) { + len = ieee802_15_4_print_command_data(ndo, command_id, p, caplen); + if (len >= 0) { + p += len; + caplen -= len; + } + } + } + if (!ndo->ndo_suppress_default_print) + ND_DEFAULTPRINT(p, caplen); + break; + } + return 1; +} + +/* + * Print and parse Multipurpose frames. + * + * Returns FALSE in case of error. + */ +static u_int +ieee802_15_4_mp_frame(netdissect_options *ndo, + const u_char *p, u_int caplen, + uint16_t fc) +{ + int len, frame_version, pan_id_present; + int src_addr_len, dst_addr_len; + int security_level; + u_int miclen = 0; + int ie_present, payload_ie_present, security_enabled; + uint8_t seq; + uint32_t fcs, crc_check; + const u_char *mic_start = NULL; + + pan_id_present = 0; + ie_present = 0; + payload_ie_present = 0; + security_enabled = 0; + crc_check = 0; + + /* Assume 2 octet FCS, the FCS length depends on the PHY, and we do not + know about that. */ + if (caplen < 3) { + /* Cannot have FCS, assume no FCS. */ + fcs = 0; + } else { + if (caplen > 4) { + /* Test for 4 octet FCS. */ + fcs = GET_LE_U_4(p + caplen - 4); + crc_check = ieee802_15_4_crc32(ndo, p, caplen - 4); + if (crc_check == fcs) { + /* Remove FCS */ + caplen -= 4; + } else { + fcs = GET_LE_U_2(p + caplen - 2); + crc_check = ieee802_15_4_crc16(ndo, p, caplen - 2); + if (crc_check == fcs) { + /* Remove FCS */ + caplen -= 2; + } + } + } else { + fcs = GET_LE_U_2(p + caplen - 2); + crc_check = ieee802_15_4_crc16(ndo, p, caplen - 2); + if (crc_check == fcs) { + /* Remove FCS */ + caplen -= 2; + } + } + } + + if (CHECK_BIT(fc, 3)) { + /* Long Frame Control */ + + /* Frame version. */ + frame_version = FC_FRAME_VERSION(fc); + ND_PRINT("v%d ", frame_version); + + pan_id_present = CHECK_BIT(fc, 8); + ie_present = CHECK_BIT(fc, 15); + security_enabled = CHECK_BIT(fc, 9); + + if (ndo->ndo_vflag > 2) { + if (security_enabled) { ND_PRINT("Security Enabled, "); } + if (CHECK_BIT(fc, 11)) { ND_PRINT("Frame Pending, "); } + if (CHECK_BIT(fc, 14)) { ND_PRINT("AR, "); } + if (pan_id_present) { ND_PRINT("PAN ID Present, "); } + if (CHECK_BIT(fc, 10)) { + ND_PRINT("Sequence Number Suppression, "); + } + if (ie_present) { ND_PRINT("IE present, "); } + } + + /* Check for the sequence number suppression. */ + if (CHECK_BIT(fc, 10)) { + /* Sequence number is suppressed, but long version. */ + if (caplen < 2) { + nd_print_trunc(ndo); + return 0; + } + p += 2; + caplen -= 2; + } else { + seq = GET_U_1(p + 2); + if (ndo->ndo_vflag) + ND_PRINT("seq %02x ", seq); + if (caplen < 3) { + nd_print_trunc(ndo); + return 0; + } + p += 3; + caplen -= 3; + } + } else { + /* Short format of header, but with seq no */ + seq = GET_U_1(p + 1); + p += 2; + caplen -= 2; + if (ndo->ndo_vflag) + ND_PRINT("seq %02x ", seq); + } + + /* See which parts of addresses we have. */ + dst_addr_len = ieee802_15_4_addr_len((fc >> 4) & 0x3); + src_addr_len = ieee802_15_4_addr_len((fc >> 6) & 0x3); + if (src_addr_len < 0) { + ND_PRINT("[ERROR: Invalid src address mode]"); + return 0; + } + if (dst_addr_len < 0) { + ND_PRINT("[ERROR: Invalid dst address mode]"); + return 0; + } + + /* Print dst PAN and address. */ + if (pan_id_present) { + if (caplen < 2) { + ND_PRINT("[ERROR: Truncated before dst_pan]"); + return 0; + } + ND_PRINT("%04x:", GET_LE_U_2(p)); + p += 2; + caplen -= 2; + } else { + ND_PRINT("-:"); + } + if (caplen < (u_int) dst_addr_len) { + ND_PRINT("[ERROR: Truncated before dst_addr]"); + return 0; + } + ieee802_15_4_print_addr(ndo, p, dst_addr_len); + p += dst_addr_len; + caplen -= dst_addr_len; + + ND_PRINT(" < "); + + /* Print src PAN and address. */ + ND_PRINT(" -:"); + if (caplen < (u_int) src_addr_len) { + ND_PRINT("[ERROR: Truncated before dst_addr]"); + return 0; + } + ieee802_15_4_print_addr(ndo, p, src_addr_len); + ND_PRINT(" "); + p += src_addr_len; + caplen -= src_addr_len; + + if (security_enabled) { + len = ieee802_15_4_print_aux_sec_header(ndo, p, caplen, + &security_level); + if (len < 0) { + return 0; + } + ND_TCHECK_LEN(p, len); + p += len; + caplen -= len; + } else { + security_level = 0; + } + + switch (security_level) { + case 0: /*FALLTHOUGH */ + case 4: + miclen = 0; + break; + case 1: /*FALLTHOUGH */ + case 5: + miclen = 4; + break; + case 2: /*FALLTHOUGH */ + case 6: + miclen = 8; + break; + case 3: /*FALLTHOUGH */ + case 7: + miclen = 16; + break; + } + + /* Remove MIC */ + if (miclen != 0) { + if (caplen < miclen) { + ND_PRINT("[ERROR: Truncated before MIC]"); + return 0; + } + caplen -= miclen; + mic_start = p + caplen; + } + + /* Parse Information elements if present */ + if (ie_present) { + /* Yes we have those. */ + len = ieee802_15_4_print_header_ie_list(ndo, p, caplen, + &payload_ie_present); + if (len < 0) { + return 0; + } + p += len; + caplen -= len; + } + + if (payload_ie_present) { + if (security_level >= 4) { + ND_PRINT("Payload IEs present, but encrypted, cannot print "); + } else { + len = ieee802_15_4_print_payload_ie_list(ndo, p, + caplen); + if (len < 0) { + return 0; + } + p += len; + caplen -= len; + } + } + + /* Print MIC */ + if (ndo->ndo_vflag > 2 && miclen != 0) { + ND_PRINT("\n\tMIC "); + + for (u_int micoffset = 0; micoffset < miclen; micoffset++) { + ND_PRINT("%02x", GET_U_1(mic_start + micoffset)); + } + ND_PRINT(" "); + } + + + /* Print FCS */ + if (ndo->ndo_vflag > 2) { + if (crc_check == fcs) { + ND_PRINT("FCS %x ", fcs); + } else { + ND_PRINT("wrong FCS %x vs %x (assume no FCS stored) ", + fcs, crc_check); + } + } + + if (!ndo->ndo_suppress_default_print) + ND_DEFAULTPRINT(p, caplen); + + return 1; +} + +/* + * Print frag frame. + * + * Returns FALSE in case of error. + */ +static u_int +ieee802_15_4_frag_frame(netdissect_options *ndo _U_, + const u_char *p _U_, + u_int caplen _U_, + uint16_t fc _U_) +{ + /* Not implement yet, might be bit hard to implement, as the + * information to set up the fragment is coming in the previous frame + * in the Fragment Sequence Context Description IE, thus we need to + * store information from there, so we can use it here. */ + return 0; +} + +/* + * Internal call to dissector taking packet + len instead of pcap_pkthdr. + * + * Returns FALSE in case of error. + */ +u_int +ieee802_15_4_print(netdissect_options *ndo, + const u_char *p, u_int caplen) +{ + int frame_type; + uint16_t fc; + + ndo->ndo_protocol = "802.15.4"; + + if (caplen < 2) { + nd_print_trunc(ndo); + return caplen; + } + + fc = GET_LE_U_2(p); + + /* First we need to check the frame type to know how to parse the rest + of the FC. Frame type is the first 3 bit of the frame control field. + */ + + frame_type = FC_FRAME_TYPE(fc); + ND_PRINT("IEEE 802.15.4 %s packet ", ftypes[frame_type]); + + switch (frame_type) { + case 0x00: /* Beacon */ + case 0x01: /* Data */ + case 0x02: /* Acknowledgement */ + case 0x03: /* MAC Command */ + return ieee802_15_4_std_frames(ndo, p, caplen, fc); + break; + case 0x04: /* Reserved */ + return 0; + break; + case 0x05: /* Multipurpose */ + return ieee802_15_4_mp_frame(ndo, p, caplen, fc); + break; + case 0x06: /* Fragment or Frak */ + return ieee802_15_4_frag_frame(ndo, p, caplen, fc); + break; + case 0x07: /* Extended */ + return 0; + break; + } + return 0; +} + +/* + * Main function to print packets. + */ + +void +ieee802_15_4_if_print(netdissect_options *ndo, + const struct pcap_pkthdr *h, const u_char *p) +{ + u_int caplen = h->caplen; + ndo->ndo_protocol = "802.15.4"; + ndo->ndo_ll_hdr_len += ieee802_15_4_print(ndo, p, caplen); +} + +/* For DLT_IEEE802_15_4_TAP */ +/* https://github.com/jkcko/ieee802.15.4-tap */ +void +ieee802_15_4_tap_if_print(netdissect_options *ndo, + const struct pcap_pkthdr *h, const u_char *p) +{ + uint8_t version; + uint16_t length; + + ndo->ndo_protocol = "802.15.4_tap"; + if (h->caplen < 4) { + nd_print_trunc(ndo); + ndo->ndo_ll_hdr_len += h->caplen; + return; + } + + version = GET_U_1(p); + length = GET_LE_U_2(p + 2); + if (version != 0 || length < 4) { + nd_print_invalid(ndo); + return; + } + + if (h->caplen < length) { + nd_print_trunc(ndo); + ndo->ndo_ll_hdr_len += h->caplen; + return; + } + + ndo->ndo_ll_hdr_len += ieee802_15_4_print(ndo, p+length, h->caplen-length) + length; +} |