414 lines
10 KiB
C
Executable File
414 lines
10 KiB
C
Executable File
/*
|
|
* canbusload.c
|
|
*
|
|
* Copyright (c) 2002-2008 Volkswagen Group Electronic Research
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the name of Volkswagen nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* Alternatively, provided that this notice is retained in full, this
|
|
* software may be distributed under the terms of the GNU General
|
|
* Public License ("GPL") version 2, in which case the provisions of the
|
|
* GPL apply INSTEAD OF those given above.
|
|
*
|
|
* The provided data structures and external interfaces from this code
|
|
* are not restricted to be used by modules with a GPL compatible license.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
|
|
* DAMAGE.
|
|
*
|
|
* Send feedback to <linux-can@vger.kernel.org>
|
|
*
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <string.h>
|
|
#include <signal.h>
|
|
#include <ctype.h>
|
|
#include <libgen.h>
|
|
#include <time.h>
|
|
|
|
#include <sys/time.h>
|
|
#include <sys/types.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/ioctl.h>
|
|
#include <sys/uio.h>
|
|
#include <net/if.h>
|
|
|
|
#include <linux/can.h>
|
|
#include <linux/can/raw.h>
|
|
|
|
#include "terminal.h"
|
|
#include "canframelen.h"
|
|
|
|
#define MAXSOCK 16 /* max. number of CAN interfaces given on the cmdline */
|
|
|
|
#define PERCENTRES 5 /* resolution in percent for bargraph */
|
|
#define NUMBAR (100/PERCENTRES) /* number of bargraph elements */
|
|
|
|
extern int optind, opterr, optopt;
|
|
|
|
static struct {
|
|
char devname[IFNAMSIZ+1];
|
|
unsigned int bitrate;
|
|
unsigned int recv_frames;
|
|
unsigned int recv_bits_total;
|
|
unsigned int recv_bits_payload;
|
|
} stat[MAXSOCK+1];
|
|
|
|
static int max_devname_len; /* to prevent frazzled device name output */
|
|
static int max_bitrate_len;
|
|
static int currmax;
|
|
static unsigned char redraw;
|
|
static unsigned char timestamp;
|
|
static unsigned char color;
|
|
static unsigned char bargraph;
|
|
static enum cfl_mode mode = CFL_WORSTCASE;
|
|
static char *prg;
|
|
|
|
void print_usage(char *prg)
|
|
{
|
|
fprintf(stderr, "\nUsage: %s [options] <CAN interface>+\n", prg);
|
|
fprintf(stderr, " (use CTRL-C to terminate %s)\n\n", prg);
|
|
fprintf(stderr, "Options: -t (show current time on the first line)\n");
|
|
fprintf(stderr, " -c (colorize lines)\n");
|
|
fprintf(stderr, " -b (show bargraph in %d%% resolution)\n", PERCENTRES);
|
|
fprintf(stderr, " -r (redraw the terminal - similar to top)\n");
|
|
fprintf(stderr, " -i (ignore bitstuffing in bandwidth calculation)\n");
|
|
fprintf(stderr, " -e (exact calculation of stuffed bits)\n");
|
|
fprintf(stderr, "\n");
|
|
fprintf(stderr, "Up to %d CAN interfaces with mandatory bitrate can be specified on the \n", MAXSOCK);
|
|
fprintf(stderr, "commandline in the form: <ifname>@<bitrate>\n\n");
|
|
fprintf(stderr, "The bitrate is mandatory as it is needed to know the CAN bus bitrate to\n");
|
|
fprintf(stderr, "calcultate the bus load percentage based on the received CAN frames.\n");
|
|
fprintf(stderr, "Due to the bitstuffing estimation the calculated busload may exceed 100%%.\n");
|
|
fprintf(stderr, "For each given interface the data is presented in one line which contains:\n\n");
|
|
fprintf(stderr, "(interface) (received CAN frames) (used bits total) (used bits for payload)\n");
|
|
fprintf(stderr, "\nExample:\n");
|
|
fprintf(stderr, "\nuser$> canbusload can0@100000 can1@500000 can2@500000 can3@500000 -r -t -b -c\n\n");
|
|
fprintf(stderr, "%s 2014-02-01 21:13:16 (worst case bitstuffing)\n", prg);
|
|
fprintf(stderr, " can0@100000 805 74491 36656 74%% |XXXXXXXXXXXXXX......|\n");
|
|
fprintf(stderr, " can1@500000 796 75140 37728 15%% |XXX.................|\n");
|
|
fprintf(stderr, " can2@500000 0 0 0 0%% |....................|\n");
|
|
fprintf(stderr, " can3@500000 47 4633 2424 0%% |....................|\n");
|
|
fprintf(stderr, "\n");
|
|
}
|
|
|
|
void sigterm(int signo)
|
|
{
|
|
exit(0);
|
|
}
|
|
|
|
void printstats(int signo)
|
|
{
|
|
int i, j, percent;
|
|
|
|
if (redraw)
|
|
printf("%s", CSR_HOME);
|
|
|
|
if (timestamp) {
|
|
time_t currtime;
|
|
struct tm now;
|
|
|
|
if (time(&currtime) == (time_t)-1) {
|
|
perror("time");
|
|
exit(1);
|
|
}
|
|
|
|
localtime_r(&currtime, &now);
|
|
|
|
printf("%s %04d-%02d-%02d %02d:%02d:%02d ",
|
|
prg,
|
|
now.tm_year + 1900,
|
|
now.tm_mon + 1,
|
|
now.tm_mday,
|
|
now.tm_hour,
|
|
now.tm_min,
|
|
now.tm_sec);
|
|
|
|
switch (mode) {
|
|
|
|
case CFL_NO_BITSTUFFING:
|
|
/* plain bit calculation without bitstuffing */
|
|
printf("(ignore bitstuffing)\n");
|
|
break;
|
|
|
|
case CFL_WORSTCASE:
|
|
/* worst case estimation - see above */
|
|
printf("(worst case bitstuffing)\n");
|
|
break;
|
|
|
|
case CFL_EXACT:
|
|
/* exact calculation of stuffed bits based on frame content and CRC */
|
|
printf("(exact bitstuffing)\n");
|
|
break;
|
|
|
|
default:
|
|
printf("(unknown bitstuffing)\n");
|
|
break;
|
|
}
|
|
}
|
|
|
|
for (i=0; i<currmax; i++) {
|
|
|
|
if (color) {
|
|
if (i%2)
|
|
printf("%s", FGRED);
|
|
else
|
|
printf("%s", FGBLUE);
|
|
}
|
|
|
|
if (stat[i].bitrate)
|
|
percent = (stat[i].recv_bits_total*100)/stat[i].bitrate;
|
|
else
|
|
percent = 0;
|
|
|
|
printf(" %*s@%-*d %5d %7d %6d %3d%%",
|
|
max_devname_len, stat[i].devname,
|
|
max_bitrate_len, stat[i].bitrate,
|
|
stat[i].recv_frames,
|
|
stat[i].recv_bits_total,
|
|
stat[i].recv_bits_payload,
|
|
percent);
|
|
|
|
if (bargraph) {
|
|
|
|
printf(" |");
|
|
|
|
if (percent > 100)
|
|
percent = 100;
|
|
|
|
for (j=0; j < NUMBAR; j++){
|
|
if (j < percent/PERCENTRES)
|
|
printf("X");
|
|
else
|
|
printf(".");
|
|
}
|
|
|
|
printf("|");
|
|
}
|
|
|
|
if (color)
|
|
printf("%s", ATTRESET);
|
|
|
|
printf("\n");
|
|
|
|
stat[i].recv_frames = 0;
|
|
stat[i].recv_bits_total = 0;
|
|
stat[i].recv_bits_payload = 0;
|
|
}
|
|
|
|
printf("\n");
|
|
fflush(stdout);
|
|
|
|
alarm(1);
|
|
}
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
fd_set rdfs;
|
|
int s[MAXSOCK];
|
|
|
|
int opt;
|
|
char *ptr, *nptr;
|
|
struct sockaddr_can addr;
|
|
struct can_frame frame;
|
|
int nbytes, i;
|
|
struct ifreq ifr;
|
|
sigset_t sigmask, savesigmask;
|
|
|
|
signal(SIGTERM, sigterm);
|
|
signal(SIGHUP, sigterm);
|
|
signal(SIGINT, sigterm);
|
|
|
|
signal(SIGALRM, printstats);
|
|
|
|
prg = basename(argv[0]);
|
|
|
|
while ((opt = getopt(argc, argv, "rtbcieh?")) != -1) {
|
|
switch (opt) {
|
|
case 'r':
|
|
redraw = 1;
|
|
break;
|
|
|
|
case 't':
|
|
timestamp = 1;
|
|
break;
|
|
|
|
case 'b':
|
|
bargraph = 1;
|
|
break;
|
|
|
|
case 'c':
|
|
color = 1;
|
|
break;
|
|
|
|
case 'i':
|
|
mode = CFL_NO_BITSTUFFING;
|
|
break;
|
|
|
|
case 'e':
|
|
mode = CFL_EXACT;
|
|
break;
|
|
|
|
default:
|
|
print_usage(prg);
|
|
exit(1);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (optind == argc) {
|
|
print_usage(prg);
|
|
exit(0);
|
|
}
|
|
|
|
currmax = argc - optind; /* find real number of CAN devices */
|
|
|
|
if (currmax > MAXSOCK) {
|
|
printf("More than %d CAN devices given on commandline!\n", MAXSOCK);
|
|
return 1;
|
|
}
|
|
|
|
for (i=0; i < currmax; i++) {
|
|
|
|
ptr = argv[optind+i];
|
|
|
|
nbytes = strlen(ptr);
|
|
if (nbytes >= IFNAMSIZ+sizeof("@1000000")+1) {
|
|
printf("name of CAN device '%s' is too long!\n", ptr);
|
|
return 1;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
printf("open %d '%s'.\n", i, ptr);
|
|
#endif
|
|
|
|
s[i] = socket(PF_CAN, SOCK_RAW, CAN_RAW);
|
|
if (s[i] < 0) {
|
|
perror("socket");
|
|
return 1;
|
|
}
|
|
|
|
nptr = strchr(ptr, '@');
|
|
|
|
if (!nptr) {
|
|
print_usage(prg);
|
|
return 1;
|
|
}
|
|
|
|
nbytes = nptr - ptr; /* interface name is up the first '@' */
|
|
|
|
if (nbytes >= IFNAMSIZ) {
|
|
printf("name of CAN device '%s' is too long!\n", ptr);
|
|
return 1;
|
|
}
|
|
|
|
strncpy(stat[i].devname, ptr, nbytes);
|
|
memset(&ifr.ifr_name, 0, sizeof(ifr.ifr_name));
|
|
strncpy(ifr.ifr_name, ptr, nbytes);
|
|
|
|
if (nbytes > max_devname_len)
|
|
max_devname_len = nbytes; /* for nice printing */
|
|
|
|
stat[i].bitrate = atoi(nptr+1); /* bitrate is placed behind the '@' */
|
|
|
|
if (!stat[i].bitrate || stat[i].bitrate > 1000000) {
|
|
printf("invalid bitrate for CAN device '%s'!\n", ptr);
|
|
return 1;
|
|
}
|
|
|
|
nbytes = strlen(nptr+1);
|
|
if (nbytes > max_bitrate_len)
|
|
max_bitrate_len = nbytes; /* for nice printing */
|
|
|
|
|
|
#ifdef DEBUG
|
|
printf("using interface name '%s'.\n", ifr.ifr_name);
|
|
#endif
|
|
|
|
if (ioctl(s[i], SIOCGIFINDEX, &ifr) < 0) {
|
|
perror("SIOCGIFINDEX");
|
|
exit(1);
|
|
}
|
|
|
|
addr.can_family = AF_CAN;
|
|
addr.can_ifindex = ifr.ifr_ifindex;
|
|
|
|
if (bind(s[i], (struct sockaddr *)&addr, sizeof(addr)) < 0) {
|
|
perror("bind");
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
alarm(1);
|
|
|
|
if (redraw)
|
|
printf("%s", CLR_SCREEN);
|
|
|
|
while (1) {
|
|
|
|
FD_ZERO(&rdfs);
|
|
for (i=0; i<currmax; i++)
|
|
FD_SET(s[i], &rdfs);
|
|
|
|
savesigmask = sigmask;
|
|
|
|
if (pselect(s[currmax-1]+1, &rdfs, NULL, NULL, NULL, &sigmask) < 0) {
|
|
//perror("pselect");
|
|
sigmask = savesigmask;
|
|
continue;
|
|
}
|
|
|
|
for (i=0; i<currmax; i++) { /* check all CAN RAW sockets */
|
|
|
|
if (FD_ISSET(s[i], &rdfs)) {
|
|
|
|
nbytes = read(s[i], &frame, sizeof(struct can_frame));
|
|
|
|
if (nbytes < 0) {
|
|
perror("read");
|
|
return 1;
|
|
}
|
|
|
|
if (nbytes < sizeof(struct can_frame)) {
|
|
fprintf(stderr, "read: incomplete CAN frame\n");
|
|
return 1;
|
|
}
|
|
|
|
stat[i].recv_frames++;
|
|
stat[i].recv_bits_payload += frame.can_dlc*8;
|
|
stat[i].recv_bits_total += can_frame_length((struct canfd_frame*)&frame,
|
|
mode, sizeof(frame));
|
|
}
|
|
}
|
|
}
|
|
|
|
for (i=0; i<currmax; i++)
|
|
close(s[i]);
|
|
|
|
return 0;
|
|
}
|