--- /dev/null
+/*
+ * $Id$
+ */
+
+/*
+ * 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 <socketcan-users@lists.berlios.de>
+ *
+ */
+
+#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"
+
+#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 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, "\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, "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 2008-05-27 15:18:49\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\n",
+ prg,
+ now.tm_year + 1900,
+ now.tm_mon + 1,
+ now.tm_mday,
+ now.tm_hour,
+ now.tm_min,
+ now.tm_sec);
+ }
+
+ 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 %4d %6d %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(" |");
+
+ 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");
+
+ 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, "rtbch?")) != -1) {
+ switch (opt) {
+ case 'r':
+ redraw = 1;
+ break;
+
+ case 't':
+ timestamp = 1;
+ break;
+
+ case 'b':
+ bargraph = 1;
+ break;
+
+ case 'c':
+ color = 1;
+ 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 += frame.can_dlc*8;
+ if (frame.can_id & CAN_EFF_FLAG)
+ stat[i].recv_bits_total += 67;
+ else
+ stat[i].recv_bits_total += 47;
+ }
+ }
+ }
+
+ for (i=0; i<currmax; i++)
+ close(s[i]);
+
+ return 0;
+}
projects / can-utils.git / commitdiff