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cansniffer: make use of if_nametoindex() 

Simplify the code as in other can-utils applications.

Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
pull/200/head
Oliver Hartkopp 2020-04-29 06:57:16 +02:00
parent 507ff82d81
commit 6f44582c19
1 changed files with 4 additions and 10 deletions
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14
cansniffer.c
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@ -188,7 +188,6 @@ int main(int argc, char **argv)
int opt, ret;
struct timeval timeo, start_tv, tv;
struct sockaddr_can addr;
struct ifreq ifr;
int i;
@ -260,21 +259,16 @@ int main(int argc, char **argv)
interface = argv[optind];
if ((s = socket(PF_CAN, SOCK_DGRAM, CAN_BCM)) < 0) {
s = socket(PF_CAN, SOCK_DGRAM, CAN_BCM);
if (s < 0) {
perror("socket");
return 1;
}
addr.can_family = AF_CAN;
if (strcmp(ANYDEV, argv[optind])) {
strcpy(ifr.ifr_name, argv[optind]);
if (ioctl(s, SIOCGIFINDEX, &ifr) < 0) {
perror("SIOCGIFINDEX");
exit(1);
}
addr.can_ifindex = ifr.ifr_ifindex;
}
if (strcmp(ANYDEV, argv[optind]))
addr.can_ifindex = if_nametoindex(argv[optind]);
else
addr.can_ifindex = 0; /* any can interface */