tcpdump/print-bt.c
Francois-Xavier Le Bail 9d7fa2e15a Bluetooth: Add some bounds and length checks
Moreover:
Add and use tstr[].
Fix indent.
2018-02-08 14:06:28 +01:00

76 lines
2.3 KiB
C

/*
* Copyright (c) 2007
* paolo.abeni@email.it All rights reserved.
*
* 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 Paolo Abeni.''
* The name of author may not 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: Bluetooth printer */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "netdissect-stdinc.h"
#include "netdissect.h"
#include "extract.h"
static const char tstr[] = " [|bt]";
#if defined(DLT_BLUETOOTH_HCI_H4_WITH_PHDR) && defined(HAVE_PCAP_BLUETOOTH_H)
#include <pcap/bluetooth.h>
#define BT_HDRLEN sizeof(pcap_bluetooth_h4_header)
/*
* This is the top level routine of the printer. 'p' points
* to the bluetooth header of the packet, 'h->ts' is the timestamp,
* 'h->len' is the length of the packet off the wire, and 'h->caplen'
* is the number of bytes actually captured.
*/
u_int
bt_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, const u_char *p)
{
u_int length = h->len;
u_int caplen = h->caplen;
const pcap_bluetooth_h4_header* hdr = (const pcap_bluetooth_h4_header*)p;
if (caplen < BT_HDRLEN || length < BT_HDRLEN)
goto trunc;
caplen -= BT_HDRLEN;
length -= BT_HDRLEN;
p += BT_HDRLEN;
ND_TCHECK_4(&hdr->direction);
if (ndo->ndo_eflag)
ND_PRINT("hci length %u, direction %s, ", length,
(EXTRACT_BE_U_4(&hdr->direction)&0x1) ? "in" : "out");
if (!ndo->ndo_suppress_default_print)
ND_DEFAULTPRINT(p, caplen);
trunc:
ND_PRINT("%s", tstr);
return (BT_HDRLEN);
}
#endif
/*
* Local Variables:
* c-style: whitesmith
* c-basic-offset: 8
* End:
*/