forecast: Restrict strncpy() call

Closes strongswan/strongswan#331.

diff --git a/src/libcharon/plugins/forecast/forecast_forwarder.c b/src/libcharon/plugins/forecast/forecast_forwarder.c
index 42b57b10bc17546ae268fbda0354a096acf39dd2..4bb6ef3376f2e36588638c8ec3e17124d8a57264 100644 (file)
--- a/src/libcharon/plugins/forecast/forecast_forwarder.c
+++ b/src/libcharon/plugins/forecast/forecast_forwarder.c
@@ -361,7 +361,8 @@ static int get_ifindex(private_kernel_listener_t *this, char *ifname)
 {
        struct ifreq ifr = {};
 
-       strncpy(ifr.ifr_name, ifname, IFNAMSIZ);
+       strncpy(ifr.ifr_name, ifname, IFNAMSIZ-1);
+
        if (ioctl(this->raw, SIOCGIFINDEX, &ifr) == 0)
        {
                return ifr.ifr_ifindex;