/*
* 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
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*
- * Send feedback to <socketcan-users@lists.berlios.de>
+ * Send feedback to <linux-can@vger.kernel.org>
*
*/
#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 */
const char col_on [MAXCOL][19] = {BLUE, RED, GREEN, BOLD, MAGENTA, CYAN};
const char col_off [] = ATTRESET;
+static char *cmdlinename[MAXSOCK];
+static __u32 dropcnt[MAXSOCK];
+static __u32 last_dropcnt[MAXSOCK];
static char devname[MAXIFNAMES][IFNAMSIZ+1];
static int dindex[MAXIFNAMES];
static int max_devname_len; /* to prevent frazzled device name output */
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, " -u <usecs> (delay bridge forwarding by <usecs> microseconds)\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, " -d (monitor dropped CAN frames)\n");
+ fprintf(stderr, " -e (dump CAN error frames in human-readable format)\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");
fd_set rdfs;
int s[MAXSOCK];
int bridge = 0;
+ useconds_t bridge_delay = 0;
unsigned char timestamp = 0;
+ unsigned char dropmonitor = 0;
unsigned char silent = SILENT_INI;
unsigned char silentani = 0;
unsigned char color = 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;
struct sockaddr_can addr;
- struct can_filter rfilter[MAXFILTER];
+ char ctrlmsg[CMSG_SPACE(sizeof(struct timeval)) + CMSG_SPACE(sizeof(__u32))];
+ struct iovec iov;
+ struct msghdr msg;
+ struct cmsghdr *cmsg;
+ 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:ciaSs:b:B:lLn:h?")) != -1) {
+ while ((opt = getopt(argc, argv, "t:ciaSs:b:B:u:ldLn:r:he?")) != -1) {
switch (opt) {
case 't':
timestamp = optarg[0];
view |= CANLIB_VIEW_SWAP;
break;
+ case 'e':
+ view |= CANLIB_VIEW_ERROR;
+ break;
+
case 's':
silent = atoi(optarg);
if (silent > SILENT_ON) {
setsockopt(bridge, SOL_CAN_RAW, CAN_RAW_FILTER, NULL, 0);
if (opt == 'B') {
- int loopback = 0;
+ const int loopback = 0;
setsockopt(bridge, SOL_CAN_RAW, CAN_RAW_LOOPBACK,
&loopback, sizeof(loopback));
}
break;
+ case 'u':
+ bridge_delay = (useconds_t)strtoul(optarg, (char **)NULL, 10);
+ break;
+
case 'l':
log = 1;
break;
+ case 'd':
+ dropmonitor = 1;
+ break;
+
case 'L':
logfrmt = 1;
break;
}
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);
if (silent == SILENT_INI) {
if (log) {
- fprintf(stderr, "\nDisabled standard output while logging.");
+ fprintf(stderr, "Disabled standard output while logging.\n");
silent = SILENT_ON; /* disable output on stdout */
} else
silent = SILENT_OFF; /* default output */
return 1;
}
+ cmdlinename[i] = ptr; /* save pointer to cmdline name of this socket */
+
if (nptr)
nbytes = nptr - ptr; /* interface name is up the first ',' */
else
/* 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;
ptr = nptr+1; /* hop behind the ',' */
nptr = strchr(ptr, ','); /* update exit condition */
- if (sscanf(ptr, "%lx:%lx",
- (long unsigned int *)
+ if (sscanf(ptr, "%x:%x",
&rfilter[numfilter].can_id,
- (long unsigned int *)
&rfilter[numfilter].can_mask) == 2) {
rfilter[numfilter].can_mask &= ~CAN_ERR_FLAG;
numfilter++;
- } else if (sscanf(ptr, "%lx~%lx",
- (long unsigned int *)
+ } else if (sscanf(ptr, "%x~%x",
&rfilter[numfilter].can_id,
- (long unsigned int *)
&rfilter[numfilter].can_mask) == 2) {
rfilter[numfilter].can_id |= CAN_INV_FILTER;
rfilter[numfilter].can_mask &= ~CAN_ERR_FLAG;
numfilter++;
- } else if (sscanf(ptr, "#%lx",
- (long unsigned int *)&err_mask) != 1) {
+ } else if (sscanf(ptr, "#%x", &err_mask) != 1) {
fprintf(stderr, "Error in filter option parsing: '%s'\n", ptr);
- exit(1);
- }
-
- if (numfilter > MAXFILTER) {
- fprintf(stderr, "Too many filters specified for '%s'.\n",
- ifr.ifr_name);
- exit(1);
+ return 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);
+
+ /* try SO_RCVBUFFORCE first, if we run with CAP_NET_ADMIN */
+ if (setsockopt(s[i], SOL_SOCKET, SO_RCVBUFFORCE,
+ &rcvbuf_size, sizeof(rcvbuf_size)) < 0) {
+#ifdef DEBUG
+ printf("SO_RCVBUFFORCE failed so try SO_RCVBUF ...\n");
+#endif
+ if (setsockopt(s[i], SOL_SOCKET, SO_RCVBUF,
+ &rcvbuf_size, sizeof(rcvbuf_size)) < 0) {
+ perror("setsockopt SO_RCVBUF");
+ return 1;
+ }
+
+ if (getsockopt(s[i], SOL_SOCKET, SO_RCVBUF,
+ &curr_rcvbuf_size, &curr_rcvbuf_size_len) < 0) {
+ perror("getsockopt SO_RCVBUF");
+ return 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 (timestamp || log || logfrmt) {
+
+ const int timestamp_on = 1;
+
+ if (setsockopt(s[i], SOL_SOCKET, SO_TIMESTAMP,
+ ×tamp_on, sizeof(timestamp_on)) < 0) {
+ perror("setsockopt SO_TIMESTAMP");
+ return 1;
+ }
+ }
+
+ if (dropmonitor) {
+
+ const int dropmonitor_on = 1;
+
+ if (setsockopt(s[i], SOL_SOCKET, SO_RXQ_OVFL,
+ &dropmonitor_on, sizeof(dropmonitor_on)) < 0) {
+ perror("setsockopt SO_RXQ_OVFL not supported by your Linux Kernel");
+ return 1;
+ }
+ }
+
if (bind(s[i], (struct sockaddr *)&addr, sizeof(addr)) < 0) {
perror("bind");
return 1;
}
}
+ /* these settings are static and can be held out of the hot path */
+ iov.iov_base = &frame;
+ msg.msg_name = &addr;
+ msg.msg_iov = &iov;
+ msg.msg_iovlen = 1;
+ msg.msg_control = &ctrlmsg;
+
while (running) {
FD_ZERO(&rdfs);
if (FD_ISSET(s[i], &rdfs)) {
- socklen_t len = sizeof(addr);
int idx;
- nbytes = recvfrom(s[i], &frame, sizeof(struct can_frame), 0,
- (struct sockaddr*)&addr, &len);
+ /* these settings may be modified by recvmsg() */
+ iov.iov_len = sizeof(frame);
+ msg.msg_namelen = sizeof(addr);
+ msg.msg_controllen = sizeof(ctrlmsg);
+ msg.msg_flags = 0;
+
+ nbytes = recvmsg(s[i], &msg, 0);
if (nbytes < 0) {
perror("read");
return 1;
}
- if (nbytes < sizeof(struct can_frame)) {
+ if ((size_t)nbytes < sizeof(struct can_frame)) {
fprintf(stderr, "read: incomplete CAN frame\n");
return 1;
}
running = 0;
if (bridge) {
+ if (bridge_delay)
+ usleep(bridge_delay);
+
nbytes = write(bridge, &frame, sizeof(struct can_frame));
if (nbytes < 0) {
perror("bridge write");
return 1;
- } else if (nbytes < sizeof(struct can_frame)) {
+ } else if ((size_t)nbytes < sizeof(struct can_frame)) {
fprintf(stderr,"bridge write: incomplete CAN frame\n");
return 1;
}
}
- if (timestamp || log || logfrmt)
- if (ioctl(s[i], SIOCGSTAMP, &tv) < 0)
- perror("SIOCGSTAMP");
+ for (cmsg = CMSG_FIRSTHDR(&msg);
+ cmsg && (cmsg->cmsg_level == SOL_SOCKET);
+ cmsg = CMSG_NXTHDR(&msg,cmsg)) {
+ if (cmsg->cmsg_type == SO_TIMESTAMP)
+ tv = *(struct timeval *)CMSG_DATA(cmsg);
+ else if (cmsg->cmsg_type == SO_RXQ_OVFL)
+ dropcnt[i] = *(__u32 *)CMSG_DATA(cmsg);
+ }
+
+ /* check for (unlikely) dropped frames on this specific socket */
+ if (dropcnt[i] != last_dropcnt[i]) {
+
+ __u32 frames;
+
+ if (dropcnt[i] > last_dropcnt[i])
+ frames = dropcnt[i] - last_dropcnt[i];
+ else
+ frames = 4294967295U - last_dropcnt[i] + dropcnt[i]; /* 4294967295U == UINT32_MAX */
+ if (silent != SILENT_ON)
+ printf("DROPCOUNT: dropped %d CAN frame%s on '%s' socket (total drops %d)\n",
+ frames, (frames > 1)?"s":"", cmdlinename[i], dropcnt[i]);
+
+ if (log)
+ fprintf(logfile, "DROPCOUNT: dropped %d CAN frame%s on '%s' socket (total drops %d)\n",
+ frames, (frames > 1)?"s":"", cmdlinename[i], dropcnt[i]);
+
+ last_dropcnt[i] = dropcnt[i];
+ }
idx = idx2dindex(addr.can_ifindex, s[i]);
diff.tv_sec--, diff.tv_usec += 1000000;
if (diff.tv_sec < 0)
diff.tv_sec = diff.tv_usec = 0;
- printf("(%ld.%06ld) ", diff.tv_sec, diff.tv_usec);
+ printf("(%03ld.%06ld) ", diff.tv_sec, diff.tv_usec);
if (timestamp == 'd')
last_tv = tv; /* update for delta calculation */
projects / sojka / can-utils.git / blobdiff