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-rw-r--r--src/cansequence.c157
1 files changed, 81 insertions, 76 deletions
diff --git a/src/cansequence.c b/src/cansequence.c
index 40839c8..c2baf39 100644
--- a/src/cansequence.c
+++ b/src/cansequence.c
@@ -21,34 +21,34 @@
extern int optind, opterr, optopt;
-static int s = -1;
-static int running = 1;
+static int s = -1;
+static int running = 1;
-enum
-{
+enum {
VERSION_OPTION = CHAR_MAX + 1,
};
void print_usage(char *prg)
{
- fprintf(stderr, "Usage: %s <can-interface> [Options]\n"
- "\n"
- "cansequence sends CAN messages with a rising sequence number as payload.\n"
- "When the -r option is given, cansequence expects to receive these messages\n"
- "and prints an error message if a wrong sequence number is encountered.\n"
- "The main purpose of this program is to test the reliability of CAN links.\n"
- "\n"
- "Options:\n"
- " -f, --family=FAMILY Protocol family (default PF_CAN = %d)\n"
- " -t, --type=TYPE Socket type, see man 2 socket (default SOCK_RAW = %d)\n"
- " -p, --protocol=PROTO CAN protocol (default CAN_RAW = %d)\n"
- " -r, --receive work as receiver\n"
- " -l --loop=COUNT send COUNT messages\n"
- " -q --quit quit if a wrong sequence is encountered\n"
- " -v, --verbose be verbose (twice to be even more verbose\n"
- " -h --help this help\n"
- " --version print version information and exit\n",
- prg, PF_CAN, SOCK_RAW, CAN_RAW);
+ fprintf(stderr, "Usage: %s <can-interface> [Options]\n"
+ "\n"
+ "cansequence sends CAN messages with a rising sequence number as payload.\n"
+ "When the -r option is given, cansequence expects to receive these messages\n"
+ "and prints an error message if a wrong sequence number is encountered.\n"
+ "The main purpose of this program is to test the reliability of CAN links.\n"
+ "\n"
+ "Options:\n"
+ " -f, --family=FAMILY Protocol family (default PF_CAN = %d)\n"
+ " -t, --type=TYPE Socket type, see man 2 socket (default SOCK_RAW = %d)\n"
+ " -p, --protocol=PROTO CAN protocol (default CAN_RAW = %d)\n"
+ " -r, --receive work as receiver\n"
+ " -l COUNT send COUNT messages, infinite if omitted\n"
+ " --loop=COUNT \n"
+ " -q --quit quit if a wrong sequence is encountered\n"
+ " -v, --verbose be verbose (twice to be even more verbose\n"
+ " -h --help this help\n"
+ " --version print version information and exit\n",
+ prg, PF_CAN, SOCK_RAW, CAN_RAW);
}
void sigterm(int signo)
@@ -65,7 +65,7 @@ int main(int argc, char **argv)
int nbytes;
struct ifreq ifr;
int receive = 0;
- int loopcount = 1, infinite = 1;
+ int loopcount = 1, infinite;
unsigned char sequence = 0;
int sequence_init = 1;
int verbose = 0, quit = 0;
@@ -73,61 +73,63 @@ int main(int argc, char **argv)
signal(SIGTERM, sigterm);
signal(SIGHUP, sigterm);
- struct option long_options[] = {
- { "help", no_argument, 0, 'h' },
- { "family", required_argument, 0, 'f' },
- { "protocol", required_argument, 0, 'p' },
- { "type", required_argument, 0, 't' },
- { "version", no_argument, 0, VERSION_OPTION},
- { "receive", no_argument, 0, 'r'},
- { "quit", no_argument, 0, 'q'},
- { "loop", required_argument, 0, 'l'},
- { "verbose", no_argument, 0, 'v'},
- { 0, 0, 0, 0},
+ struct option long_options[] = {
+ { "help", no_argument, 0, 'h' },
+ { "family", required_argument, 0, 'f' },
+ { "protocol", required_argument, 0, 'p' },
+ { "type", required_argument, 0, 't' },
+ { "version", no_argument, 0, VERSION_OPTION},
+ { "receive", no_argument, 0, 'r'},
+ { "quit", no_argument, 0, 'q'},
+ { "loop", optional_argument, 0, 'l'},
+ { "verbose", no_argument, 0, 'v'},
+ { 0, 0, 0, 0},
};
- while ((opt = getopt_long(argc, argv, "f:t:p:vrl:hq", long_options, NULL)) != -1) {
+ while ((opt = getopt_long(argc, argv, "f:t:p:vrl::hq", long_options, NULL)) != -1) {
switch (opt) {
- case 'h':
- print_usage(basename(argv[0]));
- exit(0);
+ case 'h':
+ print_usage(basename(argv[0]));
+ exit(0);
- case 'f':
- family = strtoul(optarg, NULL, 0);
- break;
+ case 'f':
+ family = strtoul(optarg, NULL, 0);
+ break;
- case 't':
- type = strtoul(optarg, NULL, 0);
- break;
+ case 't':
+ type = strtoul(optarg, NULL, 0);
+ break;
- case 'p':
- proto = strtoul(optarg, NULL, 0);
- break;
+ case 'p':
+ proto = strtoul(optarg, NULL, 0);
+ break;
- case 'l':
+ case 'l':
+ if (optarg)
loopcount = strtoul(optarg, NULL, 0);
- infinite = 0;
- break;
+ else
+ infinite = 1;
+ break;
- case 'r':
- receive = 1;
- break;
+ case 'r':
+ receive = 1;
+ break;
- case 'q':
- quit = 1;
- break;
+ case 'q':
+ quit = 1;
+ break;
- case 'v':
- verbose++;
- break;
+ case 'v':
+ verbose++;
+ break;
- case VERSION_OPTION:
- printf("cansequence %s\n",VERSION);
- exit(0);
+ case VERSION_OPTION:
+ printf("cansequence %s\n", VERSION);
+ exit(0);
- default:
- fprintf(stderr, "Unknown option %c\n", opt);
- break;
+ default:
+ fprintf(stderr, "Unknown option %c\n", opt);
+ break;
}
}
@@ -135,10 +137,12 @@ int main(int argc, char **argv)
print_usage(basename(argv[0]));
exit(0);
}
-
+
printf("interface = %s, family = %d, type = %d, proto = %d\n",
- argv[optind], family, type, proto);
- if ((s = socket(family, type, proto)) < 0) {
+ argv[optind], family, type, proto);
+
+ s = socket(family, type, proto);
+ if (s < 0) {
perror("socket");
return 1;
}
@@ -153,9 +157,10 @@ int main(int argc, char **argv)
return 1;
}
- if(receive) {
+ if (receive) {
while ((infinite || loopcount--) && running) {
- if ((nbytes = read(s, &frame, sizeof(struct can_frame))) < 0) {
+ nbytes = read(s, &frame, sizeof(struct can_frame);
+ if (nbytes < 0) {
perror("read");
return 1;
} else {
@@ -163,16 +168,16 @@ int main(int argc, char **argv)
sequence_init = 0;
sequence = frame.data[0];
}
- if (verbose>1)
+ if (verbose > 1)
printf("received frame. sequence number: %d\n", frame.data[0]);
if (frame.data[0] != sequence) {
printf("received wrong sequence count. expected: %d, got: %d\n",
- sequence, frame.data[0]);
- if(quit)
+ sequence, frame.data[0]);
+ if (quit)
exit(1);
sequence = frame.data[0];
}
- if(verbose && !sequence)
+ if (verbose && !sequence)
printf("sequence wrap around\n");
sequence++;
}
@@ -182,8 +187,8 @@ int main(int argc, char **argv)
frame.can_id = 2;
frame.data[0] = 0;
while ((infinite || loopcount--) && running) {
- if (verbose>1)
- printf("sending frame. sequence number: %d\n",sequence);
+ if (verbose > 1)
+ printf("sending frame. sequence number: %d\n", sequence);
if (verbose && !sequence)
printf("sequence wrap around\n");
if (write(s, &frame, sizeof(frame)) < 0) {
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-19 17:26:59 +0000