+ ifp->if_index = ++if_index;
+ if (ifnet_addrs == 0 || if_index >= if_indexlim) {
+ unsigned n = (if_indexlim <<= 1) * sizeof(ifa);
+ struct ifaddr **q = (struct ifaddr **)
+ malloc(n, M_IFADDR, M_WAITOK);
+ if (ifnet_addrs) {
+ bcopy((caddr_t)ifnet_addrs, (caddr_t)q, n/2);
+ free((caddr_t)ifnet_addrs, M_IFADDR);
+ }
+ ifnet_addrs = q;
+ }
+ /* XXX -- Temporary fix before changing 10 ethernet drivers */
+ if (ifp->if_output == ether_output) {
+ ifp->if_type = IFT_ETHER;
+ ifp->if_addrlen = 6;
+ ifp->if_hdrlen = 14;
+ }
+ /*
+ * create a Link Level name for this device
+ */
+ unitname = sprint_d((u_int)ifp->if_unit, workbuf, sizeof(workbuf));
+ namelen = strlen(ifp->if_name);
+ unitlen = strlen(unitname);
+#define _offsetof(t, m) ((int)((caddr_t)&((t *)0)->m))
+ socksize = _offsetof(struct sockaddr_dl, sdl_data[0]) +
+ unitlen + namelen + ifp->if_addrlen;
+#define ROUNDUP(a) (1 + (((a) - 1) | (sizeof(long) - 1)))
+ socksize = ROUNDUP(socksize);
+ if (socksize < sizeof(*sdl))
+ socksize = sizeof(*sdl);
+ ifasize = sizeof(*ifa) + 2 * socksize;
+ ifa = (struct ifaddr *)malloc(ifasize, M_IFADDR, M_WAITOK);
+ if (ifa == 0)
+ return;
+ ifnet_addrs[if_index - 1] = ifa;
+ bzero((caddr_t)ifa, ifasize);
+ sdl = (struct sockaddr_dl *)(ifa + 1);
+ ifa->ifa_addr = (struct sockaddr *)sdl;
+ ifa->ifa_ifp = ifp;
+ sdl->sdl_len = socksize;
+ sdl->sdl_family = AF_LINK;
+ bcopy(ifp->if_name, sdl->sdl_data, namelen);
+ bcopy(unitname, namelen + (caddr_t)sdl->sdl_data, unitlen);
+ sdl->sdl_nlen = (namelen += unitlen);
+ sdl->sdl_index = ifp->if_index;
+ sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl);
+ ifa->ifa_netmask = (struct sockaddr *)sdl;
+ sdl->sdl_len = socksize - ifp->if_addrlen;
+ while (namelen != 0)
+ sdl->sdl_data[--namelen] = 0xff;
+ ifa->ifa_next = ifp->if_addrlist;
+ ifa->ifa_rtrequest = link_rtrequest;
+ ifp->if_addrlist = ifa;