/*
* candump.c
*
- * Copyright (c) 2002-2007 Volkswagen Group Electronic Research
+ * Copyright (c) 2002-2009 Volkswagen Group Electronic Research
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
#include "lib.h"
#define MAXSOCK 16 /* max. number of CAN interfaces given on the cmdline */
-#define MAXFILTER 30 /* max. number of possible filters for each socket */
#define MAXIFNAMES 30 /* size of receive name index to omit ioctls */
#define MAXCOL 6 /* number of different colors for colorized output */
#define ANYDEV "any" /* name of interface to receive from any CAN interface */
fprintf(stderr, " -c (increment color mode level)\n");
fprintf(stderr, " -i (binary output - may exceed 80 chars/line)\n");
fprintf(stderr, " -a (enable additional ASCII output)\n");
+ fprintf(stderr, " -S (swap byte order in printed CAN data[] - marked with '%c' )\n", SWAP_DELIMITER);
fprintf(stderr, " -s <level> (silent mode - %d: off (default) %d: animation %d: silent)\n", SILENT_OFF, SILENT_ANI, SILENT_ON);
fprintf(stderr, " -b <can> (bridge mode - send received frames to <can>)\n");
fprintf(stderr, " -B <can> (bridge mode - like '-b' with disabled loopback)\n");
fprintf(stderr, " -l (log CAN-frames into file. Sets '-s %d' by default)\n", SILENT_ON);
fprintf(stderr, " -L (use log file format on stdout)\n");
+ fprintf(stderr, " -n <count> (terminate after receiption of <count> CAN frames)\n");
+ fprintf(stderr, " -r <size> (set socket receive buffer to <size>)\n");
fprintf(stderr, "\n");
fprintf(stderr, "Up to %d CAN interfaces with optional filter sets can be specified\n", MAXSOCK);
fprintf(stderr, "on the commandline in the form: <ifname>[,filter]*\n");
- fprintf(stderr, "\nUp to %d comma separated filters can be specified for each given CAN interface:\n", MAXFILTER);
+ fprintf(stderr, "\nComma separated filters can be specified for each given CAN interface:\n");
fprintf(stderr, " <can_id>:<can_mask> (matches when <received_can_id> & mask == can_id & mask)\n");
fprintf(stderr, " <can_id>~<can_mask> (matches when <received_can_id> & mask != can_id & mask)\n");
fprintf(stderr, " #<error_mask> (set error frame filter, see include/linux/can/error.h)\n");
fprintf(stderr, "%s -c -c -ta can0,123:7FF,400:700,#000000FF can2,400~7F0 can3 can8\n", prg);
fprintf(stderr, "%s -l any,0~0,#FFFFFFFF (log only error frames but no(!) data frames)\n", prg);
fprintf(stderr, "%s -l any,0:0,#FFFFFFFF (log error frames and also all data frames)\n", prg);
- fprintf(stderr, "%s vcan2,92345678:9FFFFFFF (match only for extended CAN ID 12345678)\n", prg);
- fprintf(stderr, "%s vcan2,12345678:1FFFFFFF (analog to above due to 8 digit value length)\n", prg);
+ fprintf(stderr, "%s vcan2,92345678:DFFFFFFF (match only for extended CAN ID 12345678)\n", prg);
+ fprintf(stderr, "%s vcan2,123:7FF (matches CAN ID 123 - including EFF and RTR frames)\n", prg);
+ fprintf(stderr, "%s vcan2,123:C00007FF (matches CAN ID 123 - only SFF and non-RTR frames)\n", prg);
fprintf(stderr, "\n");
}
break;
if (i == MAXIFNAMES) {
- printf("Interface index cache only supports %d interfaces.\n",
+ fprintf(stderr, "Interface index cache only supports %d interfaces.\n",
MAXIFNAMES);
exit(1);
}
return i;
}
-canid_t checkeff(char *ptr, char *nptr)
-{
- int len;
-
- if (nptr)
- len = nptr - ptr;
- else
- len = strlen(ptr);
-
- if (len == 17 && (ptr[8] == ':' || ptr[8] == '~'))
- return CAN_EFF_FLAG;
- else
- return 0;
-}
-
int main(int argc, char **argv)
{
fd_set rdfs;
unsigned char view = 0;
unsigned char log = 0;
unsigned char logfrmt = 0;
+ int count = 0;
+ int rcvbuf_size = 0;
int opt, ret;
int currmax, numfilter;
char *ptr, *nptr;
- canid_t eff;
struct sockaddr_can addr;
- struct can_filter rfilter[MAXFILTER];
+ struct can_filter *rfilter;
can_err_mask_t err_mask;
struct can_frame frame;
int nbytes, i;
last_tv.tv_sec = 0;
last_tv.tv_usec = 0;
- while ((opt = getopt(argc, argv, "t:cias:b:B:lLh?")) != -1) {
+ while ((opt = getopt(argc, argv, "t:ciaSs:b:B:lLn:r:h?")) != -1) {
switch (opt) {
case 't':
timestamp = optarg[0];
if ((timestamp != 'a') && (timestamp != 'A') &&
(timestamp != 'd') && (timestamp != 'z')) {
- printf("%s: unknown timestamp mode '%c' - ignored\n",
+ fprintf(stderr, "%s: unknown timestamp mode '%c' - ignored\n",
basename(argv[0]), optarg[0]);
timestamp = 0;
}
view |= CANLIB_VIEW_ASCII;
break;
+ case 'S':
+ view |= CANLIB_VIEW_SWAP;
+ break;
+
case 's':
silent = atoi(optarg);
if (silent > SILENT_ON) {
case 'b':
case 'B':
if (strlen(optarg) >= IFNAMSIZ) {
- printf("Name of CAN device '%s' is too long!\n\n", optarg);
+ fprintf(stderr, "Name of CAN device '%s' is too long!\n\n", optarg);
return 1;
} else {
bridge = socket(PF_CAN, SOCK_RAW, CAN_RAW);
return 1;
}
+ /* disable default receive filter on this write-only RAW socket */
+ setsockopt(bridge, SOL_CAN_RAW, CAN_RAW_FILTER, NULL, 0);
+
if (opt == 'B') {
int loopback = 0;
logfrmt = 1;
break;
+ case 'n':
+ count = atoi(optarg);
+ if (count < 1) {
+ print_usage(basename(argv[0]));
+ exit(1);
+ }
+ break;
+
+ case 'r':
+ rcvbuf_size = atoi(optarg);
+ if (rcvbuf_size < 1) {
+ print_usage(basename(argv[0]));
+ exit(1);
+ }
+ break;
+
default:
print_usage(basename(argv[0]));
exit(1);
exit(0);
}
+ if (logfrmt && view) {
+ fprintf(stderr, "Log file format selected: Please disable ASCII/BINARY/SWAP options!\n");
+ exit(0);
+ }
+
if (silent == SILENT_INI) {
if (log) {
- printf("\nDisabled standard output while logging.");
+ fprintf(stderr, "\nDisabled standard output while logging.");
silent = SILENT_ON; /* disable output on stdout */
} else
silent = SILENT_OFF; /* default output */
currmax = argc - optind; /* find real number of CAN devices */
if (currmax > MAXSOCK) {
- printf("More than %d CAN devices given on commandline!\n", MAXSOCK);
+ fprintf(stderr, "More than %d CAN devices given on commandline!\n", MAXSOCK);
return 1;
}
nbytes = strlen(ptr); /* no ',' found => no filter definitions */
if (nbytes >= IFNAMSIZ) {
- printf("name of CAN device '%s' is too long!\n", ptr);
+ fprintf(stderr, "name of CAN device '%s' is too long!\n", ptr);
return 1;
}
/* found a ',' after the interface name => check for filters */
+ /* determine number of filters to alloc the filter space */
+ numfilter = 0;
+ ptr = nptr;
+ while (ptr) {
+ numfilter++;
+ ptr++; /* hop behind the ',' */
+ ptr = strchr(ptr, ','); /* exit condition */
+ }
+
+ rfilter = malloc(sizeof(struct can_filter) * numfilter);
+ if (!rfilter) {
+ fprintf(stderr, "Failed to create filter space!\n");
+ return 1;
+ }
+
numfilter = 0;
err_mask = 0;
&rfilter[numfilter].can_id,
(long unsigned int *)
&rfilter[numfilter].can_mask) == 2) {
- eff = checkeff(ptr, nptr);
- rfilter[numfilter].can_id |= eff;
- rfilter[numfilter].can_mask |= eff;
rfilter[numfilter].can_mask &= ~CAN_ERR_FLAG;
numfilter++;
} else if (sscanf(ptr, "%lx~%lx",
(long unsigned int *)
&rfilter[numfilter].can_mask) == 2) {
rfilter[numfilter].can_id |= CAN_INV_FILTER;
- eff = checkeff(ptr, nptr);
- rfilter[numfilter].can_id |= eff;
- rfilter[numfilter].can_mask |= eff;
rfilter[numfilter].can_mask &= ~CAN_ERR_FLAG;
numfilter++;
} else if (sscanf(ptr, "#%lx",
(long unsigned int *)&err_mask) != 1) {
- printf("Error in filter option parsing: '%s'\n", ptr);
- exit(1);
- }
-
- if (numfilter > MAXFILTER) {
- printf("Too many filters specified for '%s'.\n",
- ifr.ifr_name);
+ fprintf(stderr, "Error in filter option parsing: '%s'\n", ptr);
exit(1);
}
}
if (numfilter)
setsockopt(s[i], SOL_CAN_RAW, CAN_RAW_FILTER,
- &rfilter, numfilter * sizeof(struct can_filter));
+ rfilter, numfilter * sizeof(struct can_filter));
+
+ free(rfilter);
+
} /* if (nptr) */
+ if (rcvbuf_size) {
+
+ int curr_rcvbuf_size;
+ socklen_t curr_rcvbuf_size_len = sizeof(curr_rcvbuf_size);
+
+ if (setsockopt(s[i], SOL_SOCKET, SO_RCVBUF,
+ &rcvbuf_size, sizeof(rcvbuf_size)) < 0) {
+ perror("setsockopt SO_RCVBUF");
+ exit(1);
+ }
+
+ if (getsockopt(s[i], SOL_SOCKET, SO_RCVBUF,
+ &curr_rcvbuf_size, &curr_rcvbuf_size_len) < 0) {
+ perror("getsockopt SO_RCVBUF");
+ exit(1);
+ }
+
+ /* Only print a warning the first time we detect the adjustment */
+ /* n.b.: The wanted size is doubled in Linux in net/sore/sock.c */
+ if (!i && curr_rcvbuf_size < rcvbuf_size*2)
+ fprintf(stderr, "The socket receive buffer size was "
+ "adjusted due to /proc/sys/net/core/rmem_max.\n");
+ }
+
if (bind(s[i], (struct sockaddr *)&addr, sizeof(addr)) < 0) {
perror("bind");
return 1;
if (silent != SILENT_ON)
printf("\nWarning: console output active while logging!");
- printf("\nEnabling Logfile '%s'\n\n", fname);
+ fprintf(stderr, "\nEnabling Logfile '%s'\n\n", fname);
logfile = fopen(fname, "w");
if (!logfile) {
return 1;
}
+ if (count && (--count == 0))
+ running = 0;
+
if (bridge) {
nbytes = write(bridge, &frame, sizeof(struct can_frame));
if (nbytes < 0) {
projects / sojka / can-utils.git / blobdiff