8 * Copyright (c) 2002-2007 Volkswagen Group Electronic Research
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of Volkswagen nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
23 * Alternatively, provided that this notice is retained in full, this
24 * software may be distributed under the terms of the GNU General
25 * Public License ("GPL") version 2, in which case the provisions of the
26 * GPL apply INSTEAD OF those given above.
28 * The provided data structures and external interfaces from this code
29 * are not restricted to be used by modules with a GPL compatible license.
31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
35 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
36 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
37 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
38 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
39 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
40 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
41 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
44 * Send feedback to <socketcan-users@lists.berlios.de>
58 #include <sys/types.h>
59 #include <sys/socket.h>
60 #include <sys/ioctl.h>
64 #include <linux/can.h>
65 #include <linux/can/raw.h>
70 #define MAXSOCK 16 /* max. number of CAN interfaces given on the cmdline */
71 #define MAXFILTER 30 /* max. number of possible filters for each socket */
72 #define MAXIFNAMES 30 /* size of receive name index to omit ioctls */
73 #define MAXCOL 6 /* number of different colors for colorized output */
74 #define ANYDEV "any" /* name of interface to receive from any CAN interface */
75 #define ANL "\r\n" /* newline in ASC mode */
78 #define RED ATTBOLD FGRED
79 #define GREEN ATTBOLD FGGREEN
80 #define YELLOW ATTBOLD FGYELLOW
81 #define BLUE ATTBOLD FGBLUE
82 #define MAGENTA ATTBOLD FGMAGENTA
83 #define CYAN ATTBOLD FGCYAN
85 const char col_on [MAXCOL][19] = {BLUE, RED, GREEN, BOLD, MAGENTA, CYAN};
86 const char col_off [] = ATTRESET;
88 static char devname[MAXIFNAMES][IFNAMSIZ+1];
89 static int dindex[MAXIFNAMES];
90 static int max_devname_len; /* to prevent frazzled device name output */
93 const char anichar[MAXANI] = {'|', '/', '-', '\\'};
95 extern int optind, opterr, optopt;
97 static volatile int running = 1;
99 void print_usage(char *prg)
101 fprintf(stderr, "\nUsage: %s [options] <CAN interface>+\n", prg);
102 fprintf(stderr, " (use CTRL-C to terminate %s)\n\n", prg);
103 fprintf(stderr, "Options: -t <type> (timestamp: (a)bsolute/(d)elta/(z)ero/(A)bsolute w date)\n");
104 fprintf(stderr, " -c (increment color mode level)\n");
105 fprintf(stderr, " -a (enable additional ASCII output)\n");
106 fprintf(stderr, " -s <level> (silent mode - 1: animation 2: completely silent)\n");
107 fprintf(stderr, " -b <can> (bridge mode - send received frames to <can>)\n");
108 fprintf(stderr, " -B <can> (bridge mode - like '-b' with disabled loopback)\n");
109 fprintf(stderr, " -l (log CAN-frames into file)\n");
110 fprintf(stderr, " -L (use log file format on stdout)\n");
111 fprintf(stderr, "\n");
112 fprintf(stderr, "Up to %d CAN interfaces with optional filter sets can be specified\n", MAXSOCK);
113 fprintf(stderr, "on the commandline in the form: <ifname>[,filter]*\n");
114 fprintf(stderr, "\nUp to %d comma separated filters can be specified for each given CAN interface:\n", MAXFILTER);
115 fprintf(stderr, " <can_id>:<can_mask> (matches when <received_can_id> & mask == can_id & mask)\n");
116 fprintf(stderr, " <can_id>~<can_mask> (matches when <received_can_id> & mask != can_id & mask)\n");
117 fprintf(stderr, " #<error_mask> (set error frame filter, see include/linux/can/error.h)\n");
118 fprintf(stderr, "\nUse interface name '%s' to receive from all CAN interfaces.\n", ANYDEV);
119 fprintf(stderr, "CAN IDs, masks and data content are given and expected in hexadecimal values.\n");
120 fprintf(stderr, "\nExamples:\n");
121 fprintf(stderr, "%s -c -c -ta can0,123:7FF,400:700,#000000FF can2,400~7F0 can3 can8\n", prg);
122 fprintf(stderr, "%s -l any,0~0,#FFFFFFFF (log only error frames but no(!) data frames)\n", prg);
123 fprintf(stderr, "%s vcan2,92345678:9FFFFFFF (match only for extended CAN ID 12345678)\n", prg);
124 fprintf(stderr, "\n");
127 void sigterm(int signo)
132 int idx2dindex(int ifidx, int socket) {
137 for (i=0; i < MAXIFNAMES; i++) {
138 if (dindex[i] == ifidx)
142 /* create new interface index cache entry */
144 /* remove index cache zombies first */
145 for (i=0; i < MAXIFNAMES; i++) {
147 ifr.ifr_ifindex = dindex[i];
148 if (ioctl(socket, SIOCGIFNAME, &ifr) < 0)
153 for (i=0; i < MAXIFNAMES; i++)
154 if (!dindex[i]) /* free entry */
157 if (i == MAXIFNAMES) {
158 printf("Interface index cache only supports %d interfaces.\n",
165 ifr.ifr_ifindex = ifidx;
166 if (ioctl(socket, SIOCGIFNAME, &ifr) < 0)
167 perror("SIOCGIFNAME");
169 if (max_devname_len < strlen(ifr.ifr_name))
170 max_devname_len = strlen(ifr.ifr_name);
172 strcpy(devname[i], ifr.ifr_name);
175 printf("new index %d (%s)\n", i, devname[i]);
181 int main(int argc, char **argv)
186 unsigned char timestamp = 0;
187 unsigned char silent = 0;
188 unsigned char silentani = 0;
189 unsigned char color = 0;
190 unsigned char ascii = 0;
191 unsigned char log = 0;
192 unsigned char logfrmt = 0;
194 int currmax, numfilter;
196 struct sockaddr_can addr;
197 struct can_filter rfilter[MAXFILTER];
198 can_err_mask_t err_mask;
199 struct can_frame frame;
202 struct timeval tv, last_tv;
203 FILE *logfile = NULL;
205 signal(SIGTERM, sigterm);
206 signal(SIGHUP, sigterm);
207 signal(SIGINT, sigterm);
212 while ((opt = getopt(argc, argv, "t:cas:b:B:lLh?")) != -1) {
215 timestamp = optarg[0];
216 if ((timestamp != 'a') && (timestamp != 'A') &&
217 (timestamp != 'd') && (timestamp != 'z')) {
218 printf("%s: unknown timestamp mode '%c' - ignored\n",
219 basename(argv[0]), optarg[0]);
233 silent = atoi(optarg);
238 if (strlen(optarg) >= IFNAMSIZ) {
239 printf("Name of CAN device '%s' is too long!\n\n", optarg);
242 bridge = socket(PF_CAN, SOCK_RAW, CAN_RAW);
244 perror("bridge socket");
247 addr.can_family = AF_CAN;
248 strcpy(ifr.ifr_name, optarg);
249 if (ioctl(bridge, SIOCGIFINDEX, &ifr) < 0)
250 perror("SIOCGIFINDEX");
251 addr.can_ifindex = ifr.ifr_ifindex;
253 if (!addr.can_ifindex) {
254 perror("invalid bridge interface");
261 setsockopt(bridge, SOL_CAN_RAW, CAN_RAW_LOOPBACK,
262 &loopback, sizeof(loopback));
265 if (bind(bridge, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
266 perror("bridge bind");
281 print_usage(basename(argv[0]));
287 if (optind == argc) {
288 print_usage(basename(argv[0]));
292 currmax = argc - optind; /* find real number of CAN devices */
294 if (currmax > MAXSOCK) {
295 printf("More than %d CAN devices given on commandline!\n", MAXSOCK);
299 for (i=0; i < currmax; i++) {
301 ptr = argv[optind+i];
302 nptr = strchr(ptr, ',');
305 printf("open %d '%s'.\n", i, ptr);
308 s[i] = socket(PF_CAN, SOCK_RAW, CAN_RAW);
315 nbytes = nptr - ptr; /* interface name is up the first ',' */
317 nbytes = strlen(ptr); /* no ',' found => no filter definitions */
319 if (nbytes >= IFNAMSIZ) {
320 printf("name of CAN device '%s' is too long!\n", ptr);
324 if (nbytes > max_devname_len)
325 max_devname_len = nbytes; /* for nice printing */
327 addr.can_family = AF_CAN;
329 memset(&ifr.ifr_name, 0, sizeof(ifr.ifr_name));
330 strncpy(ifr.ifr_name, ptr, nbytes);
333 printf("using interface name '%s'.\n", ifr.ifr_name);
336 if (strcmp(ANYDEV, ifr.ifr_name)) {
337 if (ioctl(s[i], SIOCGIFINDEX, &ifr) < 0) {
338 perror("SIOCGIFINDEX");
341 addr.can_ifindex = ifr.ifr_ifindex;
343 addr.can_ifindex = 0; /* any can interface */
347 /* found a ',' after the interface name => check for filters */
354 ptr = nptr+1; /* hop behind the ',' */
355 nptr = strchr(ptr, ','); /* update exit condition */
357 if (sscanf(ptr, "%lx:%lx",
358 (long unsigned int *)
359 &rfilter[numfilter].can_id,
360 (long unsigned int *)
361 &rfilter[numfilter].can_mask) == 2) {
363 } else if (sscanf(ptr, "%lx~%lx",
364 (long unsigned int *)
365 &rfilter[numfilter].can_id,
366 (long unsigned int *)
367 &rfilter[numfilter].can_mask) == 2) {
368 rfilter[numfilter].can_id |= CAN_INV_FILTER;
370 } else if (sscanf(ptr, "#%lx",
371 (long unsigned int *)&err_mask) != 1) {
372 printf("Error in filter option parsing: '%s'\n", ptr);
376 if (numfilter > MAXFILTER) {
377 printf("Too many filters specified for '%s'.\n",
384 setsockopt(s[i], SOL_CAN_RAW, CAN_RAW_ERR_FILTER,
385 &err_mask, sizeof(err_mask));
388 setsockopt(s[i], SOL_CAN_RAW, CAN_RAW_FILTER,
389 &rfilter, numfilter * sizeof(struct can_filter));
392 if (bind(s[i], (struct sockaddr *)&addr, sizeof(addr)) < 0) {
401 char fname[sizeof("candump-2006-11-20_202026.log")+1];
403 if (time(&currtime) == (time_t)-1) {
408 localtime_r(&currtime, &now);
410 sprintf(fname, "candump-%04d-%02d-%02d_%02d%02d%02d.log",
418 printf("\nEnabling Logfile '%s'\n\n", fname);
420 logfile = fopen(fname, "w");
430 for (i=0; i<currmax; i++)
433 if ((ret = select(s[currmax-1]+1, &rdfs, NULL, NULL, NULL)) < 0) {
439 for (i=0; i<currmax; i++) { /* check all CAN RAW sockets */
441 if (FD_ISSET(s[i], &rdfs)) {
443 socklen_t len = sizeof(addr);
446 nbytes = recvfrom(s[i], &frame, sizeof(struct can_frame), 0,
447 (struct sockaddr*)&addr, &len);
453 if (nbytes < sizeof(struct can_frame)) {
454 fprintf(stderr, "read: incomplete CAN frame\n");
459 nbytes = write(bridge, &frame, sizeof(struct can_frame));
461 perror("bridge write");
463 } else if (nbytes < sizeof(struct can_frame)) {
464 fprintf(stderr,"bridge write: incomplete CAN frame\n");
469 if (timestamp || log || logfrmt)
470 if (ioctl(s[i], SIOCGSTAMP, &tv) < 0)
471 perror("SIOCGSTAMP");
474 idx = idx2dindex(addr.can_ifindex, s[i]);
477 /* log CAN frame with absolute timestamp & device */
478 fprintf(logfile, "(%ld.%06ld) ", tv.tv_sec, tv.tv_usec);
479 fprintf(logfile, "%*s ", max_devname_len, devname[idx]);
480 /* without seperator as logfile use-case is parsing */
481 fprint_canframe(logfile, &frame, "\n", 0);
485 /* print CAN frame in log file style to stdout */
486 printf("(%ld.%06ld) ", tv.tv_sec, tv.tv_usec);
487 printf("%*s ", max_devname_len, devname[idx]);
488 fprint_canframe(stdout, &frame, "\n", 0);
489 goto out_fflush; /* no other output to stdout */
494 printf("%c\b", anichar[silentani%=MAXANI]);
497 goto out_fflush; /* no other output to stdout */
500 printf(" %s", (color>2)?col_on[idx%MAXCOL]:"");
504 case 'a': /* absolute with timestamp */
505 printf("(%ld.%06ld) ", tv.tv_sec, tv.tv_usec);
508 case 'A': /* absolute with date */
513 tm = *localtime(&tv.tv_sec);
514 strftime(timestring, 24, "%Y-%m-%d %H:%M:%S", &tm);
515 printf("(%s.%06ld) ", timestring, tv.tv_usec);
519 case 'd': /* delta */
520 case 'z': /* starting with zero */
524 if (last_tv.tv_sec == 0) /* first init */
526 diff.tv_sec = tv.tv_sec - last_tv.tv_sec;
527 diff.tv_usec = tv.tv_usec - last_tv.tv_usec;
528 if (diff.tv_usec < 0)
529 diff.tv_sec--, diff.tv_usec += 1000000;
531 diff.tv_sec = diff.tv_usec = 0;
532 printf("(%ld.%06ld) ", diff.tv_sec, diff.tv_usec);
534 if (timestamp == 'd')
535 last_tv = tv; /* update for delta calculation */
539 default: /* no timestamp output */
543 printf(" %s", (color && (color<3))?col_on[idx%MAXCOL]:"");
544 printf("%*s", max_devname_len, devname[idx]);
545 printf("%s ", (color==1)?col_off:"");
547 fprint_long_canframe(stdout, &frame, NULL, ascii);
549 printf("%s", (color>1)?col_off:"");
558 for (i=0; i<currmax; i++)