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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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cansend.c
+7 -5
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@@ -94,13 +94,15 @@ int main(int argc, char **argv)
return 1;
}
addr.can_family = AF_CAN;
strcpy(ifr.ifr_name, argv[1]);
if (ioctl(s, SIOCGIFINDEX, &ifr) < 0) {
perror("SIOCGIFINDEX");
strncpy(ifr.ifr_name, argv[1], IFNAMSIZ - 1);
ifr.ifr_name[IFNAMSIZ - 1] = '\0';
ifr.ifr_ifindex = if_nametoindex(ifr.ifr_name);
if (!ifr.ifr_ifindex) {
perror("if_nametoindex");
return 1;
}
addr.can_family = AF_CAN;
addr.can_ifindex = ifr.ifr_ifindex;
if (required_mtu > CAN_MTU) {