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treewide: use if_nametoindex to avoid overflows

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replaced strcpy(if_name, argv[x]) + ioctl by if_idx = if_nametoindex(argv[x])
to avoid overflows caused by long user input.

Signed-off-by: Sven Schmitt <sven.schmitt@gmx.net>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Sven Schmitt
2015-06-30 21:00:04 +02:00
committed by Marc Kleine-Budde
parent 8af831f377
commit f5fb7317aa
9 changed files with 30 additions and 48 deletions
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isotpdump.c
+1 -7
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@@ -96,8 +96,6 @@ int main(int argc, char **argv)
int timestamp = 0;
int datidx = 0;
unsigned long fflen = 0;
struct ifreq ifr;
int ifindex;
struct timeval tv, last_tv;
unsigned int n_pci;
int opt;
@@ -202,12 +200,8 @@ int main(int argc, char **argv)
setsockopt(s, SOL_CAN_RAW, CAN_RAW_FILTER, &rfilter, sizeof(rfilter));
strcpy(ifr.ifr_name, argv[optind]);
ioctl(s, SIOCGIFINDEX, &ifr);
ifindex = ifr.ifr_ifindex;
addr.can_family = AF_CAN;
addr.can_ifindex = ifindex;
addr.can_ifindex = if_nametoindex(argv[optind]);
if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
perror("bind");