sven/can-utils
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Updated new 'cangen' and 'candump' in the trunk.

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This commit is contained in:
Oliver Hartkopp
2008-05-05 12:20:34 +00:00
parent 770eeeaf23
commit 5769d708e4
2 changed files with 300 additions and 188 deletions
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cangen.c
+168 -61
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@@ -47,6 +47,7 @@
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <unistd.h>
#include <string.h>
#include <signal.h>
@@ -68,30 +69,52 @@
#define DEFAULT_GAP 200 /* ms */
#define MODE_RANDOM 0
#define MODE_INCREMENT 1
#define MODE_FIX 2
extern int optind, opterr, optopt;
static volatile int running = 1;
static unsigned long long enobufs_count;
void print_usage(char *prg)
{
fprintf(stderr, "\n%s: generate random CAN frames\n\n", prg);
fprintf(stderr, "Usage: %s [can-interface]\n", prg);
fprintf(stderr, "Options: -g <ms> (gap in milli seconds) "
"default: %d\n", DEFAULT_GAP);
fprintf(stderr, " -e (extended frame mode) "
"default: standard frame format \n");
fprintf(stderr, " -I (fixed CAN ID) "
"default: 0x123\n");
fprintf(stderr, " -D (fixed CAN Data) "
"default: 01 23 45 67 89 AB CD EF\n");
fprintf(stderr, " -L (fixed CAN DLC) "
"default: 8\n");
fprintf(stderr, " -f <canframe> (other fixed CAN frame) "
"default: 123#0123456789ABCDEF\n");
fprintf(stderr, " -x (disable loopback) "
"default: standard loopback\n");
fprintf(stderr, " -v (verbose) "
"default: don't print sent frames\n");
fprintf(stderr, "\n%s: generate CAN frames\n\n", prg);
fprintf(stderr, "Usage: %s [options] <CAN interface>\n", prg);
fprintf(stderr, "Options: -g <ms> (gap in milli seconds "
"- default: %d ms)\n", DEFAULT_GAP);
fprintf(stderr, " -e (generate extended frame mode "
"(EFF) CAN frames)\n");
fprintf(stderr, " -I <mode> (CAN ID"
" generation mode - see below)\n");
fprintf(stderr, " -L <mode> (CAN data length code (dlc)"
" generation mode - see below)\n");
fprintf(stderr, " -D <mode> (CAN data (payload)"
" generation mode - see below)\n");
fprintf(stderr, " -i (ignore -ENOBUFS return values on"
" write() syscalls)\n");
fprintf(stderr, " -x (disable local loopback of "
"generated CAN frames)\n");
fprintf(stderr, " -v (increment verbose level for "
"printing sent CAN frames)\n\n");
fprintf(stderr, "Generation modes:\n");
fprintf(stderr, "'r' => random values (default)\n");
fprintf(stderr, "'i' => increment values\n");
fprintf(stderr, "<hexvalue> => fix value using <hexvalue>\n\n");
fprintf(stderr, "When incrementing the CAN data the data length code "
"minimum is set to 1.\n\n");
fprintf(stderr, "Examples:\n");
fprintf(stderr, "%s vcan0 -g 4 -I 42A -L 1 -D i -v -v ", prg);
fprintf(stderr, "(fixed CAN ID and length, inc. data)\n");
fprintf(stderr, "%s vcan0 -e -L i -v -v -v ", prg);
fprintf(stderr, "(generate EFF frames, incr. length)\n");
fprintf(stderr, "%s vcan0 -D 11223344DEADBEEF -L 8 ", prg);
fprintf(stderr, "(fixed CAN data payload and length)\n");
fprintf(stderr, "%s vcan0 -g 0 -i -x ", prg);
fprintf(stderr, "(full load test ignoring -ENOBUFS)\n");
fprintf(stderr, "%s vcan0 ", prg);
fprintf(stderr, "(my favourite default :)\n\n");
}
void sigterm(int signo)
@@ -102,13 +125,14 @@ void sigterm(int signo)
int main(int argc, char **argv)
{
unsigned long gap = DEFAULT_GAP;
unsigned char ignore_enobufs = 0;
unsigned char extended = 0;
unsigned char fix_id = 0;
unsigned char fix_data = 0;
unsigned char fix_dlc = 0;
unsigned char default_frame = 1;
unsigned char id_mode = MODE_RANDOM;
unsigned char data_mode = MODE_RANDOM;
unsigned char dlc_mode = MODE_RANDOM;
unsigned char loopback_disable = 0;
unsigned char verbose = 0;
uint64_t incdata = 0;
int opt;
int s; /* socket */
@@ -116,6 +140,7 @@ int main(int argc, char **argv)
struct sockaddr_can addr;
static struct can_frame frame;
int nbytes;
int i;
struct ifreq ifr;
struct timespec ts;
@@ -124,8 +149,13 @@ int main(int argc, char **argv)
signal(SIGHUP, sigterm);
signal(SIGINT, sigterm);
while ((opt = getopt(argc, argv, "g:eIDLf:xv")) != -1) {
while ((opt = getopt(argc, argv, "ig:eI:L:D:xvh?")) != -1) {
switch (opt) {
case 'i':
ignore_enobufs = 1;
break;
case 'g':
gap = strtoul(optarg, NULL, 10);
break;
@@ -135,65 +165,90 @@ int main(int argc, char **argv)
break;
case 'I':
fix_id = 1;
break;
case 'D':
fix_data = 1;
if (optarg[0] == 'r') {
id_mode = MODE_RANDOM;
} else if (optarg[0] == 'i') {
id_mode = MODE_INCREMENT;
} else {
id_mode = MODE_FIX;
frame.can_id = strtoul(optarg, NULL, 16);
}
break;
case 'L':
fix_dlc = 1;
if (optarg[0] == 'r') {
dlc_mode = MODE_RANDOM;
} else if (optarg[0] == 'i') {
dlc_mode = MODE_INCREMENT;
} else {
dlc_mode = MODE_FIX;
frame.can_dlc = atoi(optarg)%9;
}
break;
case 'f':
default_frame = 0;
if (parse_canframe(optarg, &frame)) {
fprintf(stderr, "'%s' is a wrong CAN frame format.\n", optarg);
exit(1);
case 'D':
if (optarg[0] == 'r') {
data_mode = MODE_RANDOM;
} else if (optarg[0] == 'i') {
data_mode = MODE_INCREMENT;
} else {
data_mode = MODE_FIX;
incdata = strtoull(optarg, NULL, 16);
for (i=0; i<8 ;i++)
frame.data[i] = (incdata >> (7-i)*8) & 0xFFULL;
}
break;
case 'v':
verbose = 1;
verbose++;
break;
case 'x':
loopback_disable = 1;
break;
case '?':
case 'h':
default:
print_usage(basename(argv[0]));
exit(1);
return 1;
break;
}
}
if (optind == argc) {
print_usage(basename(argv[0]));
exit(0);
return 1;
}
ts.tv_sec = gap / 1000;
ts.tv_nsec = (gap % 1000) * 1000000;
if (default_frame) {
if (id_mode == MODE_FIX) {
/* recognize obviously missing commandline option */
if ((frame.can_id > 0x7FF) && !extended) {
printf("The given CAN-ID is greater than 0x7FF and "
"the '-e' option is not set.\n");
return 1;
}
if (extended)
frame.can_id = 0x12345678 | CAN_EFF_FLAG;
frame.can_id &= CAN_EFF_MASK;
else
frame.can_id = 0x123;
frame.can_id &= CAN_SFF_MASK;
}
frame.can_dlc = 8;
if (extended)
frame.can_id |= CAN_EFF_FLAG;
frame.data[0] = 0x01;
frame.data[1] = 0x23;
frame.data[2] = 0x45;
frame.data[3] = 0x67;
frame.data[4] = 0x89;
frame.data[5] = 0xAB;
frame.data[6] = 0xCD;
frame.data[7] = 0xEF;
if ((data_mode == MODE_INCREMENT) && !frame.can_dlc)
frame.can_dlc = 1; /* min dlc value for incr. data */
if (strlen(argv[optind]) >= IFNAMSIZ) {
printf("Name of CAN device '%s' is too long!\n\n", argv[optind]);
return 1;
}
if ((s = socket(PF_CAN, SOCK_RAW, CAN_RAW)) < 0) {
@@ -230,8 +285,10 @@ int main(int argc, char **argv)
while (running) {
if (!fix_id) {
if (id_mode == MODE_RANDOM) {
frame.can_id = random();
if (extended) {
frame.can_id &= CAN_EFF_MASK;
frame.can_id |= CAN_EFF_FLAG;
@@ -239,21 +296,46 @@ int main(int argc, char **argv)
frame.can_id &= CAN_SFF_MASK;
}
if (!fix_dlc) {
if (dlc_mode == MODE_RANDOM) {
frame.can_dlc = random() & 0xF;
if (frame.can_dlc & 8)
frame.can_dlc = 8; /* for about 50% of the frames */
if ((data_mode == MODE_INCREMENT) && !frame.can_dlc)
frame.can_dlc = 1; /* min dlc value for incr. data */
}
if (!fix_data) {
if (data_mode == MODE_RANDOM) {
/* that's what the 64 bit alignment of data[] is for ... :) */
*(unsigned long*)(&frame.data[0]) = random();
*(unsigned long*)(&frame.data[4]) = random();
}
if ((nbytes = write(s, &frame, sizeof(struct can_frame))) < 0) {
perror("write");
return 1;
if (verbose) {
printf(" %s ", argv[optind]);
if (verbose > 1)
fprint_long_canframe(stdout, &frame, "\n", (verbose > 2)?1:0);
else
fprint_canframe(stdout, &frame, "\n", 1);
}
nbytes = write(s, &frame, sizeof(struct can_frame));
if (nbytes < 0) {
if (errno != ENOBUFS) {
perror("write");
return 1;
}
if (!ignore_enobufs) {
perror("write");
return 1;
}
enobufs_count++;
} else if (nbytes < sizeof(struct can_frame)) {
fprintf(stderr, "write: incomplete CAN frame\n");
return 1;
@@ -263,14 +345,39 @@ int main(int argc, char **argv)
if (nanosleep(&ts, NULL))
return 1;
if (verbose)
#if 0
fprint_long_canframe(stdout, &frame, "\n", 1);
#else
fprint_canframe(stdout, &frame, "\n", 1);
#endif
if (id_mode == MODE_INCREMENT) {
frame.can_id++;
if (extended) {
frame.can_id &= CAN_EFF_MASK;
frame.can_id |= CAN_EFF_FLAG;
} else
frame.can_id &= CAN_SFF_MASK;
}
if (dlc_mode == MODE_INCREMENT) {
frame.can_dlc++;
frame.can_dlc %= 9;
if ((data_mode == MODE_INCREMENT) && !frame.can_dlc)
frame.can_dlc = 1; /* min dlc value for incr. data */
}
if (data_mode == MODE_INCREMENT) {
incdata++;
for (i=0; i<8 ;i++)
frame.data[i] = (incdata >> i*8) & 0xFFULL;
}
}
if (enobufs_count)
printf("\nCounted %llu ENOBUFS return values on write().\n\n",
enobufs_count);
close(s);
return 0;