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isotpsend: add option to automatically create test data with specifc length 

Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
pull/1/head
Oliver Hartkopp 2014-10-24 21:05:52 +02:00
parent 2fa9b0005b
commit c517af5a0b
1 changed files with 19 additions and 3 deletions
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22
isotpsend.c
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@ -68,6 +68,7 @@ void print_usage(char *prg)
fprintf(stderr, " -P <mode> (check padding in FC. (l)ength (c)ontent (a)ll)\n");
fprintf(stderr, " -t <time ns> (frame transmit time (N_As) in nanosecs)\n");
fprintf(stderr, " -f <time ns> (ignore FC and force local tx stmin value in nanosecs)\n");
fprintf(stderr, " -D <len> (send a fixed PDU with len bytes - no STDIN data)\n");
fprintf(stderr, "\nCAN IDs and addresses are given and expected in hexadecimal values.\n");
fprintf(stderr, "The pdu data is expected on STDIN in space separated ASCII hex values.\n");
fprintf(stderr, "\n");
@ -84,11 +85,12 @@ int main(int argc, char **argv)
__u32 force_tx_stmin = 0;
unsigned char buf[BUFSIZE];
int buflen = 0;
int datalen = 0;
int retval = 0;
addr.can_addr.tp.tx_id = addr.can_addr.tp.rx_id = NO_CAN_ID;
while ((opt = getopt(argc, argv, "s:d:x:p:P:t:f:?")) != -1) {
while ((opt = getopt(argc, argv, "s:d:x:p:P:t:f:D:?")) != -1) {
switch (opt) {
case 's':
addr.can_addr.tp.tx_id = strtoul(optarg, (char **)NULL, 16);
@ -135,6 +137,14 @@ int main(int argc, char **argv)
force_tx_stmin = strtoul(optarg, (char **)NULL, 10);
break;
case 'D':
datalen = strtoul(optarg, (char **)NULL, 10);
if (!datalen || datalen >= BUFSIZE) {
print_usage(basename(argv[0]));
exit(0);
}
break;
case '?':
print_usage(basename(argv[0]));
exit(0);
@ -176,8 +186,14 @@ int main(int argc, char **argv)
exit(1);
}
while (buflen < BUFSIZE && scanf("%hhx", &buf[buflen]) == 1)
buflen++;
if (!datalen) {
while (buflen < BUFSIZE && scanf("%hhx", &buf[buflen]) == 1)
buflen++;
} else {
for (buflen = 0; buflen < datalen; buflen++)
buf[buflen] = ((buflen % 0xFF) + 1) & 0xFF;
}
retval = write(s, buf, buflen);
if (retval < 0) {