ifasize           292 net/if.c       	unsigned socksize, ifasize;
ifasize           313 net/if.c       	ifasize = sizeof(*ifa) + 2 * socksize;
ifasize           314 net/if.c       	ifa = (struct ifaddr *)malloc(ifasize, M_IFADDR, M_WAITOK);
ifasize           315 net/if.c       	bzero((caddr_t)ifa, ifasize);