1/*
2 * l2ping.c
3 *
4 * Copyright (c) 2001-2002 Maksim Yevmenkin <m_evmenkin@yahoo.com>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 * $Id: l2ping.c,v 1.5 2003/05/16 19:54:40 max Exp $
29 * $FreeBSD$
30 */
31
32#include <sys/ioctl.h>
33#include <sys/time.h>
34#include <arpa/inet.h>
35#include <netinet/in.h>
36#include <assert.h>
37#include <bluetooth.h>
38#include <err.h>
39#include <errno.h>
40#include <limits.h>
41#include <stdio.h>
42#include <stdlib.h>
43#include <string.h>
44#include <unistd.h>
45
46static void	usage	(void);
47static void	tv_sub	(struct timeval *, struct timeval const *);
48static double	tv2msec	(struct timeval const *);
49
50#undef	min
51#define	min(x, y)	(((x) > (y))? (y) : (x))
52
53static char const		pattern[] = "1234567890-";
54#define PATTERN_SIZE		(sizeof(pattern) - 1)
55
56/*
57 * Main
58 */
59
60int
61main(int argc, char *argv[])
62{
63	bdaddr_t		 src, dst;
64	struct hostent		*he;
65	uint8_t			*echo_data;
66	struct sockaddr_l2cap	 sa;
67	int32_t			 n, s, count, wait, flood, echo_size, numeric;
68	char			*endp, *rname;
69
70	/* Set defaults */
71	memcpy(&src, NG_HCI_BDADDR_ANY, sizeof(src));
72	memcpy(&dst, NG_HCI_BDADDR_ANY, sizeof(dst));
73
74	echo_data = (uint8_t *) calloc(NG_L2CAP_MAX_ECHO_SIZE, sizeof(uint8_t));
75	if (echo_data == NULL) {
76		fprintf(stderr, "Failed to allocate echo data buffer");
77		exit(1);
78	}
79
80	/*
81	 * Set default echo size to the NG_L2CAP_MTU_MINIMUM minus
82	 * the size of the L2CAP signalling command header.
83	 */
84
85	echo_size = NG_L2CAP_MTU_MINIMUM - sizeof(ng_l2cap_cmd_hdr_t);
86	count = -1; /* unimited */
87	wait = 1;   /* sec */
88	flood = 0;
89	numeric = 0;
90
91	/* Parse command line arguments */
92	while ((n = getopt(argc, argv, "a:c:fi:nS:s:h")) != -1) {
93		switch (n) {
94		case 'a':
95			if (!bt_aton(optarg, &dst)) {
96				if ((he = bt_gethostbyname(optarg)) == NULL)
97					errx(1, "%s: %s", optarg, hstrerror(h_errno));
98
99				memcpy(&dst, he->h_addr, sizeof(dst));
100			}
101			break;
102
103		case 'c':
104			count = strtol(optarg, &endp, 10);
105			if (count <= 0 || *endp != '\0')
106				usage();
107			break;
108
109		case 'f':
110			flood = 1;
111			break;
112
113		case 'i':
114			wait = strtol(optarg, &endp, 10);
115			if (wait <= 0 || *endp != '\0')
116				usage();
117			break;
118
119		case 'n':
120			numeric = 1;
121			break;
122
123		case 'S':
124			if (!bt_aton(optarg, &src)) {
125				if ((he = bt_gethostbyname(optarg)) == NULL)
126					errx(1, "%s: %s", optarg, hstrerror(h_errno));
127
128				memcpy(&src, he->h_addr, sizeof(src));
129			}
130			break;
131
132		case 's':
133                        echo_size = strtol(optarg, &endp, 10);
134                        if (echo_size < sizeof(int32_t) ||
135			    echo_size > NG_L2CAP_MAX_ECHO_SIZE ||
136			    *endp != '\0')
137				usage();
138			break;
139
140		case 'h':
141		default:
142			usage();
143			break;
144		}
145	}
146
147	if (memcmp(&dst, NG_HCI_BDADDR_ANY, sizeof(dst)) == 0)
148		usage();
149
150	he = bt_gethostbyaddr((const char *)&dst, sizeof(dst), AF_BLUETOOTH);
151	if (he == NULL || he->h_name == NULL || he->h_name[0] == '\0' || numeric)
152		asprintf(&rname, "%s", bt_ntoa(&dst, NULL));
153	else
154		rname = strdup(he->h_name);
155
156	if (rname == NULL)
157		errx(1, "Failed to create remote hostname");
158
159	s = socket(PF_BLUETOOTH, SOCK_RAW, BLUETOOTH_PROTO_L2CAP);
160	if (s < 0)
161		err(2, "Could not create socket");
162
163	memset(&sa, 0, sizeof(sa));
164	sa.l2cap_len = sizeof(sa);
165	sa.l2cap_family = AF_BLUETOOTH;
166	memcpy(&sa.l2cap_bdaddr, &src, sizeof(sa.l2cap_bdaddr));
167
168	if (bind(s, (struct sockaddr *) &sa, sizeof(sa)) < 0)
169		err(3,
170"Could not bind socket, src bdaddr=%s", bt_ntoa(&sa.l2cap_bdaddr, NULL));
171
172	memset(&sa, 0, sizeof(sa));
173	sa.l2cap_len = sizeof(sa);
174	sa.l2cap_family = AF_BLUETOOTH;
175	memcpy(&sa.l2cap_bdaddr, &dst, sizeof(sa.l2cap_bdaddr));
176
177	if (connect(s, (struct sockaddr *) &sa, sizeof(sa)) < 0)
178		err(4,
179"Could not connect socket, dst bdaddr=%s", bt_ntoa(&sa.l2cap_bdaddr, NULL));
180
181	/* Fill pattern */
182	for (n = 0; n < echo_size; ) {
183		int32_t	avail = min(echo_size - n, PATTERN_SIZE);
184
185		memcpy(echo_data + n, pattern, avail);
186		n += avail;
187	}
188
189	/* Start ping'ing */
190	for (n = 0; count == -1 || count > 0; n ++) {
191		struct ng_btsocket_l2cap_raw_ping	r;
192		struct timeval				a, b;
193		int32_t					fail;
194
195		if (gettimeofday(&a, NULL) < 0)
196			err(5, "Could not gettimeofday(a)");
197
198		fail = 0;
199		*((int32_t *) echo_data) = htonl(n);
200
201		r.result = 0;
202		r.echo_size = echo_size;
203		r.echo_data = echo_data;
204		if (ioctl(s, SIOC_L2CAP_L2CA_PING, &r, sizeof(r)) < 0) {
205			r.result = errno;
206			fail = 1;
207/*
208			warn("Could not ping, dst bdaddr=%s",
209				bt_ntoa(&r.echo_dst, NULL));
210*/
211		}
212
213		if (gettimeofday(&b, NULL) < 0)
214			err(7, "Could not gettimeofday(b)");
215
216		tv_sub(&b, &a);
217
218		fprintf(stdout,
219"%d bytes from %s seq_no=%d time=%.3f ms result=%#x %s\n",
220			r.echo_size,
221			rname,
222			ntohl(*((int32_t *)(r.echo_data))),
223			tv2msec(&b), r.result,
224			((fail == 0)? "" : strerror(errno)));
225
226		if (!flood) {
227			/* Wait */
228			a.tv_sec = wait;
229			a.tv_usec = 0;
230			select(0, NULL, NULL, NULL, &a);
231		}
232
233		if (count != -1)
234			count --;
235	}
236
237	free(rname);
238	free(echo_data);
239	close(s);
240
241	return (0);
242} /* main */
243
244/*
245 * a -= b, for timevals
246 */
247
248static void
249tv_sub(struct timeval *a, struct timeval const *b)
250{
251	if (a->tv_usec < b->tv_usec) {
252		a->tv_usec += 1000000;
253		a->tv_sec -= 1;
254	}
255
256	a->tv_usec -= b->tv_usec;
257	a->tv_sec -= b->tv_sec;
258} /* tv_sub */
259
260/*
261 * convert tv to msec
262 */
263
264static double
265tv2msec(struct timeval const *tvp)
266{
267	return(((double)tvp->tv_usec)/1000.0 + ((double)tvp->tv_sec)*1000.0);
268} /* tv2msec */
269
270/*
271 * Usage
272 */
273
274static void
275usage(void)
276{
277	fprintf(stderr, "Usage: l2ping [-fhn] -a remote " \
278		"[-c count] [-i wait] [-S source] [-s size]\n");
279	fprintf(stderr, "Where:\n");
280	fprintf(stderr, "  -a remote  Specify remote device to ping\n");
281	fprintf(stderr, "  -c count   Number of packets to send\n");
282	fprintf(stderr, "  -f         No delay between packets\n");
283	fprintf(stderr, "  -h         Display this message\n");
284	fprintf(stderr, "  -i wait    Delay between packets (sec)\n");
285	fprintf(stderr, "  -n         Numeric output only\n");
286	fprintf(stderr, "  -S source  Specify source device\n");
287	fprintf(stderr, "  -s size    Packet size (bytes), " \
288		"between %zd and %zd\n", sizeof(int32_t), NG_L2CAP_MAX_ECHO_SIZE);
289
290	exit(255);
291} /* usage */
292
293