return -1;
}
- uint32_t mask = iface->addr4[0].prefix ? htonl(~((1 << (32 - iface->addr4[0].prefix)) - 1)) : 0;
+ uint32_t mask = iface->addr4 && iface->addr4[0].prefix ?
+ htonl(~((1 << (32 - iface->addr4[0].prefix)) - 1)) : 0xffffffff;
/* Create a range if not specified */
if (!(iface->dhcpv4_start.s_addr & htonl(0xffff0000)) &&