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/*
* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <tcpdump-stdinc.h>
#include <stdio.h>
#include <pcap.h>
#include <string.h>
#include "interface.h"
#include "addrtoname.h"
#include "extract.h"
static const char *ftypes[] = {
"Beacon", /* 0 */
"Data", /* 1 */
"ACK", /* 2 */
"Command", /* 3 */
"Reserved", /* 4 */
"Reserved", /* 5 */
"Reserved", /* 6 */
"Reserved", /* 7 */
};
static int
extract_header_length(u_int16_t fc)
{
int len = 0;
switch ((fc >> 10) & 0x3) {
case 0x00:
if (fc & (1 << 6)) /* intra-PAN with none dest addr */
return -1;
break;
case 0x01:
return -1;
case 0x02:
len += 4;
break;
case 0x03:
len += 10;
break;
}
switch ((fc >> 14) & 0x3) {
case 0x00:
break;
case 0x01:
return -1;
case 0x02:
len += 4;
break;
case 0x03:
len += 10;
break;
}
if (fc & (1 << 6)) {
if (len < 2)
return -1;
len -= 2;
}
return len;
}
u_int
ieee802_15_4_if_print(struct netdissect_options *ndo,
const struct pcap_pkthdr *h, const u_char *p)
{
u_int caplen = h->caplen;
int hdrlen;
u_int16_t fc;
u_int8_t seq;
if (caplen < 3) {
ND_PRINT((ndo, "[|802.15.4] %x", caplen));
return caplen;
}
fc = EXTRACT_LE_16BITS(p);
hdrlen = extract_header_length(fc);
seq = EXTRACT_LE_8BITS(p + 2);
p += 3;
caplen -= 3;
ND_PRINT((ndo,"IEEE 802.15.4 %s packet ", ftypes[fc & 0x7]));
if (vflag)
ND_PRINT((ndo,"seq %02x ", seq));
if (hdrlen == -1) {
ND_PRINT((ndo,"malformed! "));
return caplen;
}
if (!vflag) {
p+= hdrlen;
caplen -= hdrlen;
} else {
u_int16_t panid = 0;
switch ((fc >> 10) & 0x3) {
case 0x00:
ND_PRINT((ndo,"none "));
break;
case 0x01:
ND_PRINT((ndo,"reserved destination addressing mode"));
return 0;
case 0x02:
panid = EXTRACT_LE_16BITS(p);
p += 2;
ND_PRINT((ndo,"%04x:%04x ", panid, EXTRACT_LE_16BITS(p)));
p += 2;
break;
case 0x03:
panid = EXTRACT_LE_16BITS(p);
p += 2;
ND_PRINT((ndo,"%04x:%s ", panid, le64addr_string(p)));
p += 8;
break;
}
ND_PRINT((ndo,"< ");
switch ((fc >> 14) & 0x3) {
case 0x00:
ND_PRINT((ndo,"none "));
break;
case 0x01:
ND_PRINT((ndo,"reserved source addressing mode"));
return 0;
case 0x02:
if (!(fc & (1 << 6))) {
panid = EXTRACT_LE_16BITS(p);
p += 2;
}
ND_PRINT((ndo,"%04x:%04x ", panid, EXTRACT_LE_16BITS(p)));
p += 2;
break;
case 0x03:
if (!(fc & (1 << 6))) {
panid = EXTRACT_LE_16BITS(p);
p += 2;
}
ND_PRINT((ndo,"%04x:%s ", panid, le64addr_string(p))));
p += 8;
break;
}
caplen -= hdrlen;
}
if (!suppress_default_print)
(ndo->ndo_default_print)(ndo, p, caplen);
return 0;
}