1/*
2 * Copyright (c) 2007
3 *	paolo.abeni@email.it  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that: (1) source code distributions
7 * retain the above copyright notice and this paragraph in its entirety, (2)
8 * distributions including binary code include the above copyright notice and
9 * this paragraph in its entirety in the documentation or other materials
10 * provided with the distribution, and (3) all advertising materials mentioning
11 * features or use of this software display the following acknowledgement:
12 * ``This product includes software developed by Paolo Abeni.''
13 * The name of author may not be used to endorse or promote products derived
14 * from this software without specific prior written permission.
15 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
16 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
17 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
18 */
19
20/* \summary: Bluetooth printer */
21
22#ifdef HAVE_CONFIG_H
23#include <config.h>
24#endif
25
26#include "netdissect-stdinc.h"
27
28#define ND_LONGJMP_FROM_TCHECK
29#include "netdissect.h"
30#include "extract.h"
31
32#ifdef DLT_BLUETOOTH_HCI_H4_WITH_PHDR
33
34/*
35 * Header prepended by libpcap to each bluetooth h4 frame;
36 * the direction field is in network byte order.
37 */
38typedef struct _bluetooth_h4_header {
39	nd_uint32_t direction; /* if first bit is set direction is incoming */
40} bluetooth_h4_header;
41
42#define	BT_HDRLEN sizeof(bluetooth_h4_header)
43
44/*
45 * This is the top level routine of the printer.  'p' points
46 * to the bluetooth header of the packet, 'h->ts' is the timestamp,
47 * 'h->len' is the length of the packet off the wire, and 'h->caplen'
48 * is the number of bytes actually captured.
49 */
50void
51bt_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, const u_char *p)
52{
53	u_int length = h->len;
54	u_int caplen = h->caplen;
55	const bluetooth_h4_header *hdr = (const bluetooth_h4_header *)p;
56
57	ndo->ndo_protocol = "bluetooth";
58	nd_print_protocol(ndo);
59	ND_TCHECK_LEN(p, BT_HDRLEN);
60	ndo->ndo_ll_hdr_len += BT_HDRLEN;
61	caplen -= BT_HDRLEN;
62	length -= BT_HDRLEN;
63	p += BT_HDRLEN;
64	if (ndo->ndo_eflag)
65		ND_PRINT(", hci length %u, direction %s", length,
66			 (GET_BE_U_4(hdr->direction)&0x1) ? "in" : "out");
67
68	if (!ndo->ndo_suppress_default_print)
69		ND_DEFAULTPRINT(p, caplen);
70}
71#endif
72