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 #define L2CAP_SOCKET_CHECKED
38 #include <bluetooth.h>
39 #include <err.h>
40 #include <errno.h>
41 #include <limits.h>
42 #include <stdio.h>
43 #include <stdlib.h>
44 #include <string.h>
45 #include <unistd.h>
46
47 static void usage (void);
48 static void tv_sub (struct timeval *, struct timeval const *);
49 static double tv2msec (struct timeval const *);
50
51 #undef min
52 #define min(x, y) (((x) > (y))? (y) : (x))
53
54 static char const pattern[] = "1234567890-";
55 #define PATTERN_SIZE (sizeof(pattern) - 1)
56
57 /*
58 * Main
59 */
60
61 int
main(int argc,char * argv[])62 main(int argc, char *argv[])
63 {
64 bdaddr_t src, dst;
65 struct hostent *he;
66 uint8_t *echo_data;
67 struct sockaddr_l2cap sa;
68 int32_t n, s, count, wait, flood, echo_size, numeric;
69 char *endp, *rname;
70
71 /* Set defaults */
72 memcpy(&src, NG_HCI_BDADDR_ANY, sizeof(src));
73 memcpy(&dst, NG_HCI_BDADDR_ANY, sizeof(dst));
74
75 echo_data = (uint8_t *) calloc(NG_L2CAP_MAX_ECHO_SIZE, sizeof(uint8_t));
76 if (echo_data == NULL) {
77 fprintf(stderr, "Failed to allocate echo data buffer");
78 exit(1);
79 }
80
81 /*
82 * Set default echo size to the NG_L2CAP_MTU_MINIMUM minus
83 * the size of the L2CAP signalling command header.
84 */
85
86 echo_size = NG_L2CAP_MTU_MINIMUM - sizeof(ng_l2cap_cmd_hdr_t);
87 count = -1; /* unimited */
88 wait = 1; /* sec */
89 flood = 0;
90 numeric = 0;
91
92 /* Parse command line arguments */
93 while ((n = getopt(argc, argv, "a:c:fi:nS:s:h")) != -1) {
94 switch (n) {
95 case 'a':
96 if (!bt_aton(optarg, &dst)) {
97 if ((he = bt_gethostbyname(optarg)) == NULL)
98 errx(1, "%s: %s", optarg, hstrerror(h_errno));
99
100 memcpy(&dst, he->h_addr, sizeof(dst));
101 }
102 break;
103
104 case 'c':
105 count = strtol(optarg, &endp, 10);
106 if (count <= 0 || *endp != '\0')
107 usage();
108 break;
109
110 case 'f':
111 flood = 1;
112 break;
113
114 case 'i':
115 wait = strtol(optarg, &endp, 10);
116 if (wait <= 0 || *endp != '\0')
117 usage();
118 break;
119
120 case 'n':
121 numeric = 1;
122 break;
123
124 case 'S':
125 if (!bt_aton(optarg, &src)) {
126 if ((he = bt_gethostbyname(optarg)) == NULL)
127 errx(1, "%s: %s", optarg, hstrerror(h_errno));
128
129 memcpy(&src, he->h_addr, sizeof(src));
130 }
131 break;
132
133 case 's':
134 echo_size = strtol(optarg, &endp, 10);
135 if (echo_size < sizeof(int32_t) ||
136 echo_size > NG_L2CAP_MAX_ECHO_SIZE ||
137 *endp != '\0')
138 usage();
139 break;
140
141 case 'h':
142 default:
143 usage();
144 break;
145 }
146 }
147
148 if (memcmp(&dst, NG_HCI_BDADDR_ANY, sizeof(dst)) == 0)
149 usage();
150
151 he = bt_gethostbyaddr((const char *)&dst, sizeof(dst), AF_BLUETOOTH);
152 if (he == NULL || he->h_name == NULL || he->h_name[0] == '\0' || numeric)
153 asprintf(&rname, "%s", bt_ntoa(&dst, NULL));
154 else
155 rname = strdup(he->h_name);
156
157 if (rname == NULL)
158 errx(1, "Failed to create remote hostname");
159
160 s = socket(PF_BLUETOOTH, SOCK_RAW, BLUETOOTH_PROTO_L2CAP);
161 if (s < 0)
162 err(2, "Could not create socket");
163
164 memset(&sa, 0, sizeof(sa));
165 sa.l2cap_len = sizeof(sa);
166 sa.l2cap_family = AF_BLUETOOTH;
167 memcpy(&sa.l2cap_bdaddr, &src, sizeof(sa.l2cap_bdaddr));
168
169 if (bind(s, (struct sockaddr *) &sa, sizeof(sa)) < 0)
170 err(3,
171 "Could not bind socket, src bdaddr=%s", bt_ntoa(&sa.l2cap_bdaddr, NULL));
172
173 memset(&sa, 0, sizeof(sa));
174 sa.l2cap_len = sizeof(sa);
175 sa.l2cap_family = AF_BLUETOOTH;
176 memcpy(&sa.l2cap_bdaddr, &dst, sizeof(sa.l2cap_bdaddr));
177
178 if (connect(s, (struct sockaddr *) &sa, sizeof(sa)) < 0)
179 err(4,
180 "Could not connect socket, dst bdaddr=%s", bt_ntoa(&sa.l2cap_bdaddr, NULL));
181
182 /* Fill pattern */
183 for (n = 0; n < echo_size; ) {
184 int32_t avail = min(echo_size - n, PATTERN_SIZE);
185
186 memcpy(echo_data + n, pattern, avail);
187 n += avail;
188 }
189
190 /* Start ping'ing */
191 for (n = 0; count == -1 || count > 0; n ++) {
192 struct ng_btsocket_l2cap_raw_ping r;
193 struct timeval a, b;
194 int32_t fail;
195
196 if (gettimeofday(&a, NULL) < 0)
197 err(5, "Could not gettimeofday(a)");
198
199 fail = 0;
200 *((int32_t *) echo_data) = htonl(n);
201
202 r.result = 0;
203 r.echo_size = echo_size;
204 r.echo_data = echo_data;
205 if (ioctl(s, SIOC_L2CAP_L2CA_PING, &r, sizeof(r)) < 0) {
206 r.result = errno;
207 fail = 1;
208 /*
209 warn("Could not ping, dst bdaddr=%s",
210 bt_ntoa(&r.echo_dst, NULL));
211 */
212 }
213
214 if (gettimeofday(&b, NULL) < 0)
215 err(7, "Could not gettimeofday(b)");
216
217 tv_sub(&b, &a);
218
219 fprintf(stdout,
220 "%d bytes from %s seq_no=%d time=%.3f ms result=%#x %s\n",
221 r.echo_size,
222 rname,
223 ntohl(*((int32_t *)(r.echo_data))),
224 tv2msec(&b), r.result,
225 ((fail == 0)? "" : strerror(errno)));
226
227 if (!flood) {
228 /* Wait */
229 a.tv_sec = wait;
230 a.tv_usec = 0;
231 select(0, NULL, NULL, NULL, &a);
232 }
233
234 if (count != -1)
235 count --;
236 }
237
238 free(rname);
239 free(echo_data);
240 close(s);
241
242 return (0);
243 } /* main */
244
245 /*
246 * a -= b, for timevals
247 */
248
249 static void
tv_sub(struct timeval * a,struct timeval const * b)250 tv_sub(struct timeval *a, struct timeval const *b)
251 {
252 if (a->tv_usec < b->tv_usec) {
253 a->tv_usec += 1000000;
254 a->tv_sec -= 1;
255 }
256
257 a->tv_usec -= b->tv_usec;
258 a->tv_sec -= b->tv_sec;
259 } /* tv_sub */
260
261 /*
262 * convert tv to msec
263 */
264
265 static double
tv2msec(struct timeval const * tvp)266 tv2msec(struct timeval const *tvp)
267 {
268 return(((double)tvp->tv_usec)/1000.0 + ((double)tvp->tv_sec)*1000.0);
269 } /* tv2msec */
270
271 /*
272 * Usage
273 */
274
275 static void
usage(void)276 usage(void)
277 {
278 fprintf(stderr, "Usage: l2ping [-fhn] -a remote " \
279 "[-c count] [-i wait] [-S source] [-s size]\n");
280 fprintf(stderr, "Where:\n");
281 fprintf(stderr, " -a remote Specify remote device to ping\n");
282 fprintf(stderr, " -c count Number of packets to send\n");
283 fprintf(stderr, " -f No delay between packets\n");
284 fprintf(stderr, " -h Display this message\n");
285 fprintf(stderr, " -i wait Delay between packets (sec)\n");
286 fprintf(stderr, " -n Numeric output only\n");
287 fprintf(stderr, " -S source Specify source device\n");
288 fprintf(stderr, " -s size Packet size (bytes), " \
289 "between %zd and %zd\n", sizeof(int32_t), NG_L2CAP_MAX_ECHO_SIZE);
290
291 exit(255);
292 } /* usage */
293
294