8 * Copyright (c) 2002-2007 Volkswagen Group Electronic Research
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12 * modification, are permitted provided that the following conditions
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15 * notice, this list of conditions and the following disclaimer.
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20 * may be used to endorse or promote products derived from this software
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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
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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 */
77 #define SILENT_INI 42 /* detect user setting on commandline */
78 #define SILENT_OFF 0 /* no silent mode */
79 #define SILENT_ANI 1 /* silent mode with animation */
80 #define SILENT_ON 2 /* silent mode (completely silent) */
83 #define RED ATTBOLD FGRED
84 #define GREEN ATTBOLD FGGREEN
85 #define YELLOW ATTBOLD FGYELLOW
86 #define BLUE ATTBOLD FGBLUE
87 #define MAGENTA ATTBOLD FGMAGENTA
88 #define CYAN ATTBOLD FGCYAN
90 const char col_on [MAXCOL][19] = {BLUE, RED, GREEN, BOLD, MAGENTA, CYAN};
91 const char col_off [] = ATTRESET;
93 static char devname[MAXIFNAMES][IFNAMSIZ+1];
94 static int dindex[MAXIFNAMES];
95 static int max_devname_len; /* to prevent frazzled device name output */
98 const char anichar[MAXANI] = {'|', '/', '-', '\\'};
100 extern int optind, opterr, optopt;
102 static volatile int running = 1;
104 void print_usage(char *prg)
106 fprintf(stderr, "\nUsage: %s [options] <CAN interface>+\n", prg);
107 fprintf(stderr, " (use CTRL-C to terminate %s)\n\n", prg);
108 fprintf(stderr, "Options: -t <type> (timestamp: (a)bsolute/(d)elta/(z)ero/(A)bsolute w date)\n");
109 fprintf(stderr, " -c (increment color mode level)\n");
110 fprintf(stderr, " -i (binary output - may exceed 80 chars/line)\n");
111 fprintf(stderr, " -a (enable additional ASCII output)\n");
112 fprintf(stderr, " -s <level> (silent mode - %d: off (default) %d: animation %d: silent)\n", SILENT_OFF, SILENT_ANI, SILENT_ON);
113 fprintf(stderr, " -b <can> (bridge mode - send received frames to <can>)\n");
114 fprintf(stderr, " -B <can> (bridge mode - like '-b' with disabled loopback)\n");
115 fprintf(stderr, " -l (log CAN-frames into file. Sets '-s %d' by default)\n", SILENT_ON);
116 fprintf(stderr, " -L (use log file format on stdout)\n");
117 fprintf(stderr, "\n");
118 fprintf(stderr, "Up to %d CAN interfaces with optional filter sets can be specified\n", MAXSOCK);
119 fprintf(stderr, "on the commandline in the form: <ifname>[,filter]*\n");
120 fprintf(stderr, "\nUp to %d comma separated filters can be specified for each given CAN interface:\n", MAXFILTER);
121 fprintf(stderr, " <can_id>:<can_mask> (matches when <received_can_id> & mask == can_id & mask)\n");
122 fprintf(stderr, " <can_id>~<can_mask> (matches when <received_can_id> & mask != can_id & mask)\n");
123 fprintf(stderr, " #<error_mask> (set error frame filter, see include/linux/can/error.h)\n");
124 fprintf(stderr, "\nCAN IDs, masks and data content are given and expected in hexadecimal values.\n");
125 fprintf(stderr, "When can_id and can_mask are both 8 digits, they are assumed to be 29 bit EFF.\n");
126 fprintf(stderr, "Without any given filter all data frames are received ('0:0' default filter).\n");
127 fprintf(stderr, "\nUse interface name '%s' to receive from all CAN interfaces.\n", ANYDEV);
128 fprintf(stderr, "\nExamples:\n");
129 fprintf(stderr, "%s -c -c -ta can0,123:7FF,400:700,#000000FF can2,400~7F0 can3 can8\n", prg);
130 fprintf(stderr, "%s -l any,0~0,#FFFFFFFF (log only error frames but no(!) data frames)\n", prg);
131 fprintf(stderr, "%s -l any,0:0,#FFFFFFFF (log error frames and also all data frames)\n", prg);
132 fprintf(stderr, "%s vcan2,92345678:9FFFFFFF (match only for extended CAN ID 12345678)\n", prg);
133 fprintf(stderr, "%s vcan2,12345678:1FFFFFFF (analog to above due to 8 digit value length)\n", prg);
134 fprintf(stderr, "\n");
137 void sigterm(int signo)
142 int idx2dindex(int ifidx, int socket) {
147 for (i=0; i < MAXIFNAMES; i++) {
148 if (dindex[i] == ifidx)
152 /* create new interface index cache entry */
154 /* remove index cache zombies first */
155 for (i=0; i < MAXIFNAMES; i++) {
157 ifr.ifr_ifindex = dindex[i];
158 if (ioctl(socket, SIOCGIFNAME, &ifr) < 0)
163 for (i=0; i < MAXIFNAMES; i++)
164 if (!dindex[i]) /* free entry */
167 if (i == MAXIFNAMES) {
168 printf("Interface index cache only supports %d interfaces.\n",
175 ifr.ifr_ifindex = ifidx;
176 if (ioctl(socket, SIOCGIFNAME, &ifr) < 0)
177 perror("SIOCGIFNAME");
179 if (max_devname_len < strlen(ifr.ifr_name))
180 max_devname_len = strlen(ifr.ifr_name);
182 strcpy(devname[i], ifr.ifr_name);
185 printf("new index %d (%s)\n", i, devname[i]);
191 canid_t checkeff(char *ptr, char *nptr)
200 if (len == 17 && (ptr[8] == ':' || ptr[8] == '~'))
206 int main(int argc, char **argv)
211 unsigned char timestamp = 0;
212 unsigned char silent = SILENT_INI;
213 unsigned char silentani = 0;
214 unsigned char color = 0;
215 unsigned char view = 0;
216 unsigned char log = 0;
217 unsigned char logfrmt = 0;
219 int currmax, numfilter;
222 struct sockaddr_can addr;
223 struct can_filter rfilter[MAXFILTER];
224 can_err_mask_t err_mask;
225 struct can_frame frame;
228 struct timeval tv, last_tv;
229 FILE *logfile = NULL;
231 signal(SIGTERM, sigterm);
232 signal(SIGHUP, sigterm);
233 signal(SIGINT, sigterm);
238 while ((opt = getopt(argc, argv, "t:cias:b:B:lLh?")) != -1) {
241 timestamp = optarg[0];
242 if ((timestamp != 'a') && (timestamp != 'A') &&
243 (timestamp != 'd') && (timestamp != 'z')) {
244 printf("%s: unknown timestamp mode '%c' - ignored\n",
245 basename(argv[0]), optarg[0]);
255 view |= CANLIB_VIEW_BINARY;
259 view |= CANLIB_VIEW_ASCII;
263 silent = atoi(optarg);
264 if (silent > SILENT_ON) {
265 print_usage(basename(argv[0]));
272 if (strlen(optarg) >= IFNAMSIZ) {
273 printf("Name of CAN device '%s' is too long!\n\n", optarg);
276 bridge = socket(PF_CAN, SOCK_RAW, CAN_RAW);
278 perror("bridge socket");
281 addr.can_family = AF_CAN;
282 strcpy(ifr.ifr_name, optarg);
283 if (ioctl(bridge, SIOCGIFINDEX, &ifr) < 0)
284 perror("SIOCGIFINDEX");
285 addr.can_ifindex = ifr.ifr_ifindex;
287 if (!addr.can_ifindex) {
288 perror("invalid bridge interface");
295 setsockopt(bridge, SOL_CAN_RAW, CAN_RAW_LOOPBACK,
296 &loopback, sizeof(loopback));
299 if (bind(bridge, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
300 perror("bridge bind");
315 print_usage(basename(argv[0]));
321 if (optind == argc) {
322 print_usage(basename(argv[0]));
326 if (silent == SILENT_INI) {
328 printf("\nDisabled standard output while logging.");
329 silent = SILENT_ON; /* disable output on stdout */
331 silent = SILENT_OFF; /* default output */
334 currmax = argc - optind; /* find real number of CAN devices */
336 if (currmax > MAXSOCK) {
337 printf("More than %d CAN devices given on commandline!\n", MAXSOCK);
341 for (i=0; i < currmax; i++) {
343 ptr = argv[optind+i];
344 nptr = strchr(ptr, ',');
347 printf("open %d '%s'.\n", i, ptr);
350 s[i] = socket(PF_CAN, SOCK_RAW, CAN_RAW);
357 nbytes = nptr - ptr; /* interface name is up the first ',' */
359 nbytes = strlen(ptr); /* no ',' found => no filter definitions */
361 if (nbytes >= IFNAMSIZ) {
362 printf("name of CAN device '%s' is too long!\n", ptr);
366 if (nbytes > max_devname_len)
367 max_devname_len = nbytes; /* for nice printing */
369 addr.can_family = AF_CAN;
371 memset(&ifr.ifr_name, 0, sizeof(ifr.ifr_name));
372 strncpy(ifr.ifr_name, ptr, nbytes);
375 printf("using interface name '%s'.\n", ifr.ifr_name);
378 if (strcmp(ANYDEV, ifr.ifr_name)) {
379 if (ioctl(s[i], SIOCGIFINDEX, &ifr) < 0) {
380 perror("SIOCGIFINDEX");
383 addr.can_ifindex = ifr.ifr_ifindex;
385 addr.can_ifindex = 0; /* any can interface */
389 /* found a ',' after the interface name => check for filters */
396 ptr = nptr+1; /* hop behind the ',' */
397 nptr = strchr(ptr, ','); /* update exit condition */
399 if (sscanf(ptr, "%lx:%lx",
400 (long unsigned int *)
401 &rfilter[numfilter].can_id,
402 (long unsigned int *)
403 &rfilter[numfilter].can_mask) == 2) {
404 eff = checkeff(ptr, nptr);
405 rfilter[numfilter].can_id |= eff;
406 rfilter[numfilter].can_mask |= eff;
407 rfilter[numfilter].can_mask &= ~CAN_ERR_FLAG;
409 } else if (sscanf(ptr, "%lx~%lx",
410 (long unsigned int *)
411 &rfilter[numfilter].can_id,
412 (long unsigned int *)
413 &rfilter[numfilter].can_mask) == 2) {
414 rfilter[numfilter].can_id |= CAN_INV_FILTER;
415 eff = checkeff(ptr, nptr);
416 rfilter[numfilter].can_id |= eff;
417 rfilter[numfilter].can_mask |= eff;
418 rfilter[numfilter].can_mask &= ~CAN_ERR_FLAG;
420 } else if (sscanf(ptr, "#%lx",
421 (long unsigned int *)&err_mask) != 1) {
422 printf("Error in filter option parsing: '%s'\n", ptr);
426 if (numfilter > MAXFILTER) {
427 printf("Too many filters specified for '%s'.\n",
434 setsockopt(s[i], SOL_CAN_RAW, CAN_RAW_ERR_FILTER,
435 &err_mask, sizeof(err_mask));
438 setsockopt(s[i], SOL_CAN_RAW, CAN_RAW_FILTER,
439 &rfilter, numfilter * sizeof(struct can_filter));
442 if (bind(s[i], (struct sockaddr *)&addr, sizeof(addr)) < 0) {
451 char fname[sizeof("candump-2006-11-20_202026.log")+1];
453 if (time(&currtime) == (time_t)-1) {
458 localtime_r(&currtime, &now);
460 sprintf(fname, "candump-%04d-%02d-%02d_%02d%02d%02d.log",
468 if (silent != SILENT_ON)
469 printf("\nWarning: console output active while logging!");
471 printf("\nEnabling Logfile '%s'\n\n", fname);
473 logfile = fopen(fname, "w");
483 for (i=0; i<currmax; i++)
486 if ((ret = select(s[currmax-1]+1, &rdfs, NULL, NULL, NULL)) < 0) {
492 for (i=0; i<currmax; i++) { /* check all CAN RAW sockets */
494 if (FD_ISSET(s[i], &rdfs)) {
496 socklen_t len = sizeof(addr);
499 nbytes = recvfrom(s[i], &frame, sizeof(struct can_frame), 0,
500 (struct sockaddr*)&addr, &len);
506 if (nbytes < sizeof(struct can_frame)) {
507 fprintf(stderr, "read: incomplete CAN frame\n");
512 nbytes = write(bridge, &frame, sizeof(struct can_frame));
514 perror("bridge write");
516 } else if (nbytes < sizeof(struct can_frame)) {
517 fprintf(stderr,"bridge write: incomplete CAN frame\n");
522 if (timestamp || log || logfrmt)
523 if (ioctl(s[i], SIOCGSTAMP, &tv) < 0)
524 perror("SIOCGSTAMP");
527 idx = idx2dindex(addr.can_ifindex, s[i]);
530 /* log CAN frame with absolute timestamp & device */
531 fprintf(logfile, "(%ld.%06ld) ", tv.tv_sec, tv.tv_usec);
532 fprintf(logfile, "%*s ", max_devname_len, devname[idx]);
533 /* without seperator as logfile use-case is parsing */
534 fprint_canframe(logfile, &frame, "\n", 0);
538 /* print CAN frame in log file style to stdout */
539 printf("(%ld.%06ld) ", tv.tv_sec, tv.tv_usec);
540 printf("%*s ", max_devname_len, devname[idx]);
541 fprint_canframe(stdout, &frame, "\n", 0);
542 goto out_fflush; /* no other output to stdout */
545 if (silent != SILENT_OFF){
546 if (silent == SILENT_ANI) {
547 printf("%c\b", anichar[silentani%=MAXANI]);
550 goto out_fflush; /* no other output to stdout */
553 printf(" %s", (color>2)?col_on[idx%MAXCOL]:"");
557 case 'a': /* absolute with timestamp */
558 printf("(%ld.%06ld) ", tv.tv_sec, tv.tv_usec);
561 case 'A': /* absolute with date */
566 tm = *localtime(&tv.tv_sec);
567 strftime(timestring, 24, "%Y-%m-%d %H:%M:%S", &tm);
568 printf("(%s.%06ld) ", timestring, tv.tv_usec);
572 case 'd': /* delta */
573 case 'z': /* starting with zero */
577 if (last_tv.tv_sec == 0) /* first init */
579 diff.tv_sec = tv.tv_sec - last_tv.tv_sec;
580 diff.tv_usec = tv.tv_usec - last_tv.tv_usec;
581 if (diff.tv_usec < 0)
582 diff.tv_sec--, diff.tv_usec += 1000000;
584 diff.tv_sec = diff.tv_usec = 0;
585 printf("(%ld.%06ld) ", diff.tv_sec, diff.tv_usec);
587 if (timestamp == 'd')
588 last_tv = tv; /* update for delta calculation */
592 default: /* no timestamp output */
596 printf(" %s", (color && (color<3))?col_on[idx%MAXCOL]:"");
597 printf("%*s", max_devname_len, devname[idx]);
598 printf("%s ", (color==1)?col_off:"");
600 fprint_long_canframe(stdout, &frame, NULL, view);
602 printf("%s", (color>1)?col_off:"");
611 for (i=0; i<currmax; i++)