hcidump.c revision 803752117135528b1adebf0fa045596e188a996d 
1/*
2 *
3 *  Bluetooth packet analyzer - HCIdump
4 *
5 *  Copyright (C) 2000-2002  Maxim Krasnyansky <maxk@qualcomm.com>
6 *  Copyright (C) 2003-2004  Marcel Holtmann <marcel@holtmann.org>
7 *
8 *
9 *  This program is free software; you can redistribute it and/or modify
10 *  it under the terms of the GNU General Public License as published by
11 *  the Free Software Foundation; either version 2 of the License, or
12 *  (at your option) any later version.
13 *
14 *  This program is distributed in the hope that it will be useful,
15 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
16 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17 *  GNU General Public License for more details.
18 *
19 *  You should have received a copy of the GNU General Public License
20 *  along with this program; if not, write to the Free Software
21 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
22 *
23 *
24 *  $Id$
25 */
26
27#ifdef HAVE_CONFIG_H
28#include <config.h>
29#endif
30
31#include <stdio.h>
32#include <errno.h>
33#include <fcntl.h>
34#include <stdlib.h>
35#include <unistd.h>
36#include <termios.h>
37#include <string.h>
38#include <getopt.h>
39#include <pwd.h>
40
41#include <sys/types.h>
42#include <sys/socket.h>
43#include <sys/ioctl.h>
44#include <sys/uio.h>
45#include <sys/stat.h>
46#include <netinet/in.h>
47
48#include <bluetooth/bluetooth.h>
49#include <bluetooth/hci.h>
50#include <bluetooth/hci_lib.h>
51
52#include "parser/parser.h"
53#include "parser/sdp.h"
54
55#define SNAP_LEN HCI_MAX_FRAME_SIZE
56
57/* Modes */
58enum {
59	PARSE,
60	READ,
61	WRITE
62};
63
64/* Default options */
65static int  device;
66static int  snap_len = SNAP_LEN;
67static int  defpsm = 0;
68static int  mode = PARSE;
69static long flags;
70static long filter;
71static char *dump_file;
72
73struct dump_hdr {
74	uint16_t	len;
75	uint8_t		in;
76	uint8_t		pad;
77	uint32_t	ts_sec;
78	uint32_t	ts_usec;
79} __attribute__ ((packed));
80#define DUMP_HDR_SIZE (sizeof(struct dump_hdr))
81
82static inline int read_n(int fd, char *buf, int len)
83{
84	register int t = 0, w;
85
86	while (len > 0) {
87		if ((w = read(fd, buf, len)) < 0) {
88			if (errno == EINTR || errno == EAGAIN)
89				continue;
90			return -1;
91		}
92		if (!w)
93			return 0;
94		len -= w; buf += w; t += w;
95	}
96	return t;
97}
98
99static inline int write_n(int fd, char *buf, int len)
100{
101	register int t = 0, w;
102
103	while (len > 0) {
104		if ((w = write(fd, buf, len)) < 0) {
105			if (errno == EINTR || errno == EAGAIN)
106				continue;
107			return -1;
108		}
109		if (!w)
110			return 0;
111		len -= w; buf += w; t += w;
112	}
113	return t;
114}
115
116static void process_frames(int dev, int sock, int file)
117{
118	struct cmsghdr *cmsg;
119	struct msghdr msg;
120	struct iovec  iv;
121	struct dump_hdr *dh;
122	struct frame frm;
123	char *buf, *ctrl;
124
125	if (snap_len < SNAP_LEN)
126		snap_len = SNAP_LEN;
127
128	if (!(buf = malloc(snap_len + DUMP_HDR_SIZE))) {
129		perror("Can't allocate data buffer");
130		exit(1);
131	}
132
133	dh = (void *) buf;
134	frm.data = buf + DUMP_HDR_SIZE;
135
136	if (!(ctrl = malloc(100))) {
137		perror("Can't allocate control buffer");
138		exit(1);
139	}
140
141	printf("device: hci%d snap_len: %d filter: 0x%lx\n",
142		dev, snap_len, filter);
143
144	memset(&msg, 0, sizeof(msg));
145
146	while (1) {
147		iv.iov_base = frm.data;
148		iv.iov_len  = snap_len;
149
150		msg.msg_iov = &iv;
151		msg.msg_iovlen = 1;
152		msg.msg_control = ctrl;
153		msg.msg_controllen = 100;
154
155		if ((frm.data_len = recvmsg(sock, &msg, 0)) < 0) {
156			perror("Receive failed");
157			exit(1);
158		}
159
160		/* Process control message */
161		frm.in = 0;
162		cmsg = CMSG_FIRSTHDR(&msg);
163		while (cmsg) {
164			switch (cmsg->cmsg_type) {
165			case HCI_CMSG_DIR:
166				frm.in = *((int *)CMSG_DATA(cmsg));
167				break;
168			case HCI_CMSG_TSTAMP:
169				frm.ts = *((struct timeval *)CMSG_DATA(cmsg));
170				break;
171			}
172			cmsg = CMSG_NXTHDR(&msg, cmsg);
173		}
174
175		frm.ptr = frm.data;
176		frm.len = frm.data_len;
177
178		switch (mode) {
179		case WRITE:
180			/* Save dump */
181			dh->len = htobs(frm.data_len);
182			dh->in  = frm.in;
183			dh->ts_sec  = htobl(frm.ts.tv_sec);
184			dh->ts_usec = htobl(frm.ts.tv_usec);
185			if (write_n(file, buf, frm.data_len + DUMP_HDR_SIZE) < 0) {
186				perror("Write error");
187				exit(1);
188			}
189			break;
190
191		default:
192			/* Parse and print */
193			parse(&frm);
194			break;
195		}
196	}
197}
198
199static void read_dump(int file)
200{
201	struct dump_hdr dh;
202	struct frame frm;
203	int err;
204
205	if (!(frm.data = malloc(HCI_MAX_FRAME_SIZE))) {
206		perror("Can't allocate data buffer");
207		exit(1);
208	}
209
210	while (1) {
211		if ((err = read_n(file, (void *) &dh, DUMP_HDR_SIZE)) < 0)
212			goto failed;
213		if (!err) return;
214
215		frm.data_len = btohs(dh.len);
216
217		if ((err = read_n(file, frm.data, frm.data_len)) < 0)
218			goto failed;
219		if (!err) return;
220
221		frm.ptr = frm.data;
222		frm.len = frm.data_len;
223		frm.in  = dh.in;
224		frm.ts.tv_sec  = btohl(dh.ts_sec);
225		frm.ts.tv_usec = btohl(dh.ts_usec);
226
227		parse(&frm);
228	}
229
230failed:
231	perror("Read failed");
232	exit(1);
233}
234
235static int open_file(char *file, int mode)
236{
237	int f, flags;
238
239	if (mode == WRITE)
240		flags = O_WRONLY | O_CREAT | O_APPEND;
241	else
242		flags = O_RDONLY;
243
244	if ((f = open(file, flags, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH)) < 0) {
245		perror("Can't open output file");
246		exit(1);
247	}
248	return f;
249}
250
251static int open_socket(int dev)
252{
253	struct sockaddr_hci addr;
254	struct hci_filter flt;
255	int sk, opt;
256
257	/* Create HCI socket */
258	if ((sk = socket(AF_BLUETOOTH, SOCK_RAW, BTPROTO_HCI)) < 0) {
259		perror("Can't create HCI socket");
260		exit(1);
261	}
262
263	opt = 1;
264	if (setsockopt(sk, SOL_HCI, HCI_DATA_DIR, &opt, sizeof(opt)) < 0) {
265		perror("Can't enable data direction info");
266		exit(1);
267	}
268
269	opt = 1;
270	if (setsockopt(sk, SOL_HCI, HCI_TIME_STAMP, &opt, sizeof(opt)) < 0) {
271		perror("Can't enable time stamp");
272		exit(1);
273	}
274
275	/* Setup filter */
276	hci_filter_clear(&flt);
277	hci_filter_all_ptypes(&flt);
278	hci_filter_all_events(&flt);
279	if (setsockopt(sk, SOL_HCI, HCI_FILTER, &flt, sizeof(flt)) < 0) {
280		perror("Can't set HCI filter");
281		exit(1);
282	}
283
284	/* Bind socket to the HCI device */
285	addr.hci_family = AF_BLUETOOTH;
286	addr.hci_dev = dev;
287	if (bind(sk, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
288		printf("Can't attach to device hci%d. %s(%d)\n",
289					dev, strerror(errno), errno);
290		exit(1);
291	}
292
293	return sk;
294}
295
296static struct {
297	char *name;
298	int  flag;
299} filters[] = {
300	{ "hci",	FILT_HCI	},
301	{ "sco",	FILT_SCO	},
302	{ "l2cap",	FILT_L2CAP	},
303	{ "rfcomm",	FILT_RFCOMM	},
304	{ "sdp",	FILT_SDP	},
305	{ "bnep",	FILT_BNEP	},
306	{ "cmtp",	FILT_CMTP	},
307	{ "hidp",	FILT_HIDP	},
308	{ "hcrp",	FILT_HCRP	},
309	{ "avdtp",	FILT_AVDTP	},
310	{ "capi",	FILT_CAPI	},
311	{ 0 }
312};
313
314static void parse_filter(int argc, char **argv)
315{
316	int i,n;
317
318	for (i = 0; i < argc; i++) {
319		for (n = 0; filters[n].name; n++) {
320			if (!strcmp(filters[n].name, argv[i])) {
321				filter |= filters[n].flag;
322				break;
323			}
324		}
325	}
326}
327
328static void usage(void)
329{
330	printf(
331	"Usage: hcidump [OPTION...] [filter]\n"
332	"  -i, --device=hci_dev       HCI device\n"
333	"  -s, --snap-len=len         Snap len (in bytes)\n"
334	"  -p, --psm=psm              Default PSM\n"
335	"  -w, --save-dump=file       Save dump to a file\n"
336	"  -r, --read-dump=file       Read dump from a file\n"
337	"  -t, --ts                   Display time stamps\n"
338	"  -x, --hex                  Dump data in hex\n"
339	"  -a, --ascii                Dump data in ascii\n"
340	"  -R, --raw                  Raw mode\n"
341	"  -C, --cmtp=psm             PSM for CMTP\n"
342	"  -H, --hcrp=psm             PSM for HCRP\n"
343	"  -?, --help                 Give this help list\n"
344	"      --usage                Give a short usage message\n"
345	);
346}
347
348static struct option main_options[] = {
349	{ "device",	1, 0, 'i' },
350	{ "snap-len",	1, 0, 's' },
351	{ "psm",	1, 0, 'p' },
352	{ "save-dump",	1, 0, 'w' },
353	{ "read-dump",	1, 0, 'r' },
354	{ "ts",		0, 0, 't' },
355	{ "hex",	0, 0, 'x' },
356	{ "ascii",	0, 0, 'a' },
357	{ "raw",	0, 0, 'R' },
358	{ "cmtp",	1, 0, 'C' },
359	{ "hcrp",	1, 0, 'H' },
360	{ "help",	0, 0, 'h' },
361	{ 0 }
362};
363
364int main(int argc, char *argv[])
365{
366	int opt;
367
368	printf("HCIDump - HCI packet analyzer ver %s\n", VERSION);
369
370	while ((opt=getopt_long(argc, argv, "i:s:p:w:r:txaRC:H:h", main_options, NULL)) != -1) {
371		switch(opt) {
372		case 'i':
373			device = atoi(optarg + 3);
374			break;
375
376		case 's':
377			snap_len = atoi(optarg);
378			break;
379
380		case 'p':
381			defpsm = atoi(optarg);
382			break;
383
384		case 'w':
385			mode = WRITE;
386			dump_file = strdup(optarg);
387			break;
388
389		case 'r':
390			mode = READ;
391			dump_file = strdup(optarg);
392			break;
393
394		case 't':
395			flags |= DUMP_TSTAMP;
396			break;
397
398		case 'x':
399			flags |= DUMP_HEX;
400			break;
401
402		case 'a':
403			flags |= DUMP_ASCII;
404			break;
405
406		case 'R':
407			flags |= DUMP_RAW;
408			break;
409
410		case 'C':
411			set_proto(0, atoi(optarg), SDP_UUID_CMTP);
412			break;
413
414		case 'H':
415			set_proto(0, atoi(optarg), SDP_UUID_HARDCOPY_CONTROL_CHANNEL);
416			break;
417
418		case 'h':
419		default:
420			usage();
421			exit(0);
422		}
423	}
424
425	argc -= optind;
426	argv += optind;
427	optind = 0;
428
429	if (argc > 0)
430		parse_filter(argc, argv);
431
432	/* Default settings */
433	if (!filter)
434		filter = ~0L;
435
436	switch (mode) {
437	case PARSE:
438		init_parser(flags, filter, defpsm);
439		process_frames(device, open_socket(device), -1);
440		break;
441
442	case WRITE:
443		process_frames(device, open_socket(device), open_file(dump_file, mode));
444		break;
445
446	case READ:
447		init_parser(flags, filter, defpsm);
448		read_dump(open_file(dump_file, mode));
449		break;
450	}
451
452	return 0;
453}
454