1 /*- 2 * l2ping.c 3 * 4 * SPDX-License-Identifier: BSD-2-Clause 5 * 6 * Copyright (c) 2001-2002 Maksim Yevmenkin <m_evmenkin@yahoo.com> 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 * $Id: l2ping.c,v 1.5 2003/05/16 19:54:40 max Exp $ 31 */ 32 33 #include <sys/ioctl.h> 34 #include <sys/time.h> 35 #include <arpa/inet.h> 36 #include <netinet/in.h> 37 #include <assert.h> 38 #define L2CAP_SOCKET_CHECKED 39 #include <bluetooth.h> 40 #include <err.h> 41 #include <errno.h> 42 #include <limits.h> 43 #include <stdio.h> 44 #include <stdlib.h> 45 #include <string.h> 46 #include <unistd.h> 47 48 static void usage (void); 49 static void tv_sub (struct timeval *, struct timeval const *); 50 static double tv2msec (struct timeval const *); 51 52 #undef min 53 #define min(x, y) (((x) > (y))? (y) : (x)) 54 55 static char const pattern[] = "1234567890-"; 56 #define PATTERN_SIZE (sizeof(pattern) - 1) 57 58 /* 59 * Main 60 */ 61 62 int 63 main(int argc, char *argv[]) 64 { 65 bdaddr_t src, dst; 66 struct hostent *he; 67 uint8_t *echo_data; 68 struct sockaddr_l2cap sa; 69 int32_t n, s, count, wait, flood, echo_size, numeric; 70 char *endp, *rname; 71 72 /* Set defaults */ 73 memcpy(&src, NG_HCI_BDADDR_ANY, sizeof(src)); 74 memcpy(&dst, NG_HCI_BDADDR_ANY, sizeof(dst)); 75 76 echo_data = (uint8_t *) calloc(NG_L2CAP_MAX_ECHO_SIZE, sizeof(uint8_t)); 77 if (echo_data == NULL) { 78 fprintf(stderr, "Failed to allocate echo data buffer"); 79 exit(1); 80 } 81 82 /* 83 * Set default echo size to the NG_L2CAP_MTU_MINIMUM minus 84 * the size of the L2CAP signalling command header. 85 */ 86 87 echo_size = NG_L2CAP_MTU_MINIMUM - sizeof(ng_l2cap_cmd_hdr_t); 88 count = -1; /* unimited */ 89 wait = 1; /* sec */ 90 flood = 0; 91 numeric = 0; 92 93 /* Parse command line arguments */ 94 while ((n = getopt(argc, argv, "a:c:fi:nS:s:h")) != -1) { 95 switch (n) { 96 case 'a': 97 if (!bt_aton(optarg, &dst)) { 98 if ((he = bt_gethostbyname(optarg)) == NULL) 99 errx(1, "%s: %s", optarg, hstrerror(h_errno)); 100 101 memcpy(&dst, he->h_addr, sizeof(dst)); 102 } 103 break; 104 105 case 'c': 106 count = strtol(optarg, &endp, 10); 107 if (count <= 0 || *endp != '\0') 108 usage(); 109 break; 110 111 case 'f': 112 flood = 1; 113 break; 114 115 case 'i': 116 wait = strtol(optarg, &endp, 10); 117 if (wait <= 0 || *endp != '\0') 118 usage(); 119 break; 120 121 case 'n': 122 numeric = 1; 123 break; 124 125 case 'S': 126 if (!bt_aton(optarg, &src)) { 127 if ((he = bt_gethostbyname(optarg)) == NULL) 128 errx(1, "%s: %s", optarg, hstrerror(h_errno)); 129 130 memcpy(&src, he->h_addr, sizeof(src)); 131 } 132 break; 133 134 case 's': 135 echo_size = strtol(optarg, &endp, 10); 136 if (echo_size < sizeof(int32_t) || 137 echo_size > NG_L2CAP_MAX_ECHO_SIZE || 138 *endp != '\0') 139 usage(); 140 break; 141 142 case 'h': 143 default: 144 usage(); 145 break; 146 } 147 } 148 149 if (memcmp(&dst, NG_HCI_BDADDR_ANY, sizeof(dst)) == 0) 150 usage(); 151 152 he = bt_gethostbyaddr((const char *)&dst, sizeof(dst), AF_BLUETOOTH); 153 if (he == NULL || he->h_name == NULL || he->h_name[0] == '\0' || numeric) 154 asprintf(&rname, "%s", bt_ntoa(&dst, NULL)); 155 else 156 rname = strdup(he->h_name); 157 158 if (rname == NULL) 159 errx(1, "Failed to create remote hostname"); 160 161 s = socket(PF_BLUETOOTH, SOCK_RAW, BLUETOOTH_PROTO_L2CAP); 162 if (s < 0) 163 err(2, "Could not create socket"); 164 165 memset(&sa, 0, sizeof(sa)); 166 sa.l2cap_len = sizeof(sa); 167 sa.l2cap_family = AF_BLUETOOTH; 168 memcpy(&sa.l2cap_bdaddr, &src, sizeof(sa.l2cap_bdaddr)); 169 170 if (bind(s, (struct sockaddr *) &sa, sizeof(sa)) < 0) 171 err(3, 172 "Could not bind socket, src bdaddr=%s", bt_ntoa(&sa.l2cap_bdaddr, NULL)); 173 174 memset(&sa, 0, sizeof(sa)); 175 sa.l2cap_len = sizeof(sa); 176 sa.l2cap_family = AF_BLUETOOTH; 177 memcpy(&sa.l2cap_bdaddr, &dst, sizeof(sa.l2cap_bdaddr)); 178 179 if (connect(s, (struct sockaddr *) &sa, sizeof(sa)) < 0) 180 err(4, 181 "Could not connect socket, dst bdaddr=%s", bt_ntoa(&sa.l2cap_bdaddr, NULL)); 182 183 /* Fill pattern */ 184 for (n = 0; n < echo_size; ) { 185 int32_t avail = min(echo_size - n, PATTERN_SIZE); 186 187 memcpy(echo_data + n, pattern, avail); 188 n += avail; 189 } 190 191 /* Start ping'ing */ 192 for (n = 0; count == -1 || count > 0; n ++) { 193 struct ng_btsocket_l2cap_raw_ping r; 194 struct timeval a, b; 195 int32_t fail; 196 197 if (gettimeofday(&a, NULL) < 0) 198 err(5, "Could not gettimeofday(a)"); 199 200 fail = 0; 201 *((int32_t *) echo_data) = htonl(n); 202 203 r.result = 0; 204 r.echo_size = echo_size; 205 r.echo_data = echo_data; 206 if (ioctl(s, SIOC_L2CAP_L2CA_PING, &r, sizeof(r)) < 0) { 207 r.result = errno; 208 fail = 1; 209 /* 210 warn("Could not ping, dst bdaddr=%s", 211 bt_ntoa(&r.echo_dst, NULL)); 212 */ 213 } 214 215 if (gettimeofday(&b, NULL) < 0) 216 err(7, "Could not gettimeofday(b)"); 217 218 tv_sub(&b, &a); 219 220 fprintf(stdout, 221 "%d bytes from %s seq_no=%d time=%.3f ms result=%#x %s\n", 222 r.echo_size, 223 rname, 224 ntohl(*((int32_t *)(r.echo_data))), 225 tv2msec(&b), r.result, 226 ((fail == 0)? "" : strerror(errno))); 227 228 if (!flood) { 229 /* Wait */ 230 a.tv_sec = wait; 231 a.tv_usec = 0; 232 select(0, NULL, NULL, NULL, &a); 233 } 234 235 if (count != -1) 236 count --; 237 } 238 239 free(rname); 240 free(echo_data); 241 close(s); 242 243 return (0); 244 } /* main */ 245 246 /* 247 * a -= b, for timevals 248 */ 249 250 static void 251 tv_sub(struct timeval *a, struct timeval const *b) 252 { 253 if (a->tv_usec < b->tv_usec) { 254 a->tv_usec += 1000000; 255 a->tv_sec -= 1; 256 } 257 258 a->tv_usec -= b->tv_usec; 259 a->tv_sec -= b->tv_sec; 260 } /* tv_sub */ 261 262 /* 263 * convert tv to msec 264 */ 265 266 static double 267 tv2msec(struct timeval const *tvp) 268 { 269 return(((double)tvp->tv_usec)/1000.0 + ((double)tvp->tv_sec)*1000.0); 270 } /* tv2msec */ 271 272 /* 273 * Usage 274 */ 275 276 static void 277 usage(void) 278 { 279 fprintf(stderr, "Usage: l2ping [-fhn] -a remote " \ 280 "[-c count] [-i wait] [-S source] [-s size]\n"); 281 fprintf(stderr, "Where:\n"); 282 fprintf(stderr, " -a remote Specify remote device to ping\n"); 283 fprintf(stderr, " -c count Number of packets to send\n"); 284 fprintf(stderr, " -f No delay between packets\n"); 285 fprintf(stderr, " -h Display this message\n"); 286 fprintf(stderr, " -i wait Delay between packets (sec)\n"); 287 fprintf(stderr, " -n Numeric output only\n"); 288 fprintf(stderr, " -S source Specify source device\n"); 289 fprintf(stderr, " -s size Packet size (bytes), " \ 290 "between %zd and %zd\n", sizeof(int32_t), NG_L2CAP_MAX_ECHO_SIZE); 291 292 exit(255); 293 } /* usage */ 294 295