taglinefilesource code
rt_genmask26include/linux/route.hunsigned long  rt_genmask;
rt_genmask40include/linux/route.hstruct sockaddr  rt_genmask;  /* target network mask (IP)  */
rt_genmask276net/inet/route.cmask = ((struct sockaddr_in *) &r->rt_genmask)->sin_addr.s_addr;
rt_genmask284net/inet/route.celse if (mask && r->rt_genmask.sa_family != AF_INET)
rt_genmask374net/inet/route.crt->rt_genmask.sa_family = AF_INET;
rt_genmask375net/inet/route.c((struct sockaddr_in *) &rt->rt_genmask)->sin_addr.s_addr = tmp.rt_genmask;