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can-utils
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git-svn-id: https://iocaste.extern.pengutronix.de/svn/canutils/trunks/canutils-3.0-trunk@92 5fd5a299-6ef2-0310-aa18-8b01d7c39d8c

pull/254/head^2
Marc Kleine-Budde 2008-09-10 11:24:25 +00:00
parent f4cec293dc
commit 5fa35cbe2a
1 changed files with 16 additions and 14 deletions
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30
cansequence.c
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@ -30,7 +30,7 @@ enum {
void print_usage(char *prg) void print_usage(char *prg)
{ {
fprintf(stderr, "Usage: %s <can-interface> [Options]\n" fprintf(stderr, "Usage: %s [<can-interface>] [Options]\n"
"\n" "\n"
"cansequence sends CAN messages with a rising sequence number as payload.\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" "When the -r option is given, cansequence expects to receive these messages\n"
@ -58,15 +58,16 @@ void sigterm(int signo)
int main(int argc, char **argv) int main(int argc, char **argv)
{ {
int family = PF_CAN, type = SOCK_RAW, proto = CAN_RAW;
int opt;
struct sockaddr_can addr;
struct can_frame frame; struct can_frame frame;
int nbytes;
struct ifreq ifr; struct ifreq ifr;
struct sockaddr_can addr;
char *interface = "can0";
unsigned char sequence = 0;
int family = PF_CAN, type = SOCK_RAW, proto = CAN_RAW;
int loopcount = 1, infinite = 0;
int nbytes;
int opt;
int receive = 0; int receive = 0;
int loopcount = 1, infinite;
unsigned char sequence = 0;
int sequence_init = 1; int sequence_init = 1;
int verbose = 0, quit = 0; int verbose = 0, quit = 0;
@ -133,13 +134,11 @@ int main(int argc, char **argv)
} }
} }
if (optind == argc) { if (optind != argc)
print_usage(basename(argv[0])); interface = argv[optind];
exit(0);
}
printf("interface = %s, family = %d, type = %d, proto = %d\n", printf("interface = %s, family = %d, type = %d, proto = %d\n",
argv[optind], family, type, proto); interface, family, type, proto);
s = socket(family, type, proto); s = socket(family, type, proto);
if (s < 0) { if (s < 0) {
@ -148,8 +147,11 @@ int main(int argc, char **argv)
} }
addr.can_family = family; addr.can_family = family;
strncpy(ifr.ifr_name, argv[optind], sizeof(ifr.ifr_name)); strncpy(ifr.ifr_name, interface, sizeof(ifr.ifr_name));
ioctl(s, SIOCGIFINDEX, &ifr); if (ioctl(s, SIOCGIFINDEX, &ifr)) {
perror("ioctl");
return 1;
}
addr.can_ifindex = ifr.ifr_ifindex; addr.can_ifindex = ifr.ifr_ifindex;
if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) < 0) { if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) < 0) {