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 #include <config.h>
23
24 #include "netdissect-stdinc.h"
25
26 #define ND_LONGJMP_FROM_TCHECK
27 #include "netdissect.h"
28 #include "extract.h"
29
30 #ifdef DLT_BLUETOOTH_HCI_H4_WITH_PHDR
31
32 /*
33 * Header prepended by libpcap to each bluetooth h4 frame;
34 * the direction field is in network byte order.
35 */
36 typedef struct _bluetooth_h4_header {
37 nd_uint32_t direction; /* if first bit is set direction is incoming */
38 } bluetooth_h4_header;
39
40 #define BT_HDRLEN sizeof(bluetooth_h4_header)
41
42 /*
43 * This is the top level routine of the printer. 'p' points
44 * to the bluetooth header of the packet, 'h->ts' is the timestamp,
45 * 'h->len' is the length of the packet off the wire, and 'h->caplen'
46 * is the number of bytes actually captured.
47 */
48 void
bt_if_print(netdissect_options * ndo,const struct pcap_pkthdr * h,const u_char * p)49 bt_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, const u_char *p)
50 {
51 u_int length = h->len;
52 u_int caplen = h->caplen;
53 const bluetooth_h4_header *hdr = (const bluetooth_h4_header *)p;
54
55 ndo->ndo_protocol = "bluetooth";
56 nd_print_protocol(ndo);
57 ND_TCHECK_LEN(p, BT_HDRLEN);
58 ndo->ndo_ll_hdr_len += BT_HDRLEN;
59 caplen -= BT_HDRLEN;
60 length -= BT_HDRLEN;
61 p += BT_HDRLEN;
62 if (ndo->ndo_eflag)
63 ND_PRINT(", hci length %u, direction %s", length,
64 (GET_BE_U_4(hdr->direction)&0x1) ? "in" : "out");
65
66 if (!ndo->ndo_suppress_default_print)
67 ND_DEFAULTPRINT(p, caplen);
68 }
69 #endif
70