+ register struct ifconf *ifc = (struct ifconf *)data;
+ register struct ifnet *ifp = ifnet;
+ register struct ifaddr *ifa;
+ register char *cp, *ep;
+ struct ifreq ifr, *ifrp;
+ int space = ifc->ifc_len, error = 0;
+
+ ifrp = ifc->ifc_req;
+ ep = ifr.ifr_name + sizeof (ifr.ifr_name) - 2;
+ for (; space > sizeof (ifr) && ifp; ifp = ifp->if_next) {
+ bcopy(ifp->if_name, ifr.ifr_name, sizeof (ifr.ifr_name) - 2);
+ for (cp = ifr.ifr_name; cp < ep && *cp; cp++)
+ ;
+ *cp++ = '0' + ifp->if_unit; *cp = '\0';
+ if ((ifa = ifp->if_addrlist) == 0) {
+ bzero((caddr_t)&ifr.ifr_addr, sizeof(ifr.ifr_addr));
+ error = copyout((caddr_t)&ifr, (caddr_t)ifrp, sizeof (ifr));
+ if (error)
+ break;
+ space -= sizeof (ifr), ifrp++;
+ } else
+ for ( ; space > sizeof (ifr) && ifa; ifa = ifa->ifa_next) {
+ register struct sockaddr *sa = ifa->ifa_addr;
+#ifdef COMPAT_43
+ if (cmd == OSIOCGIFCONF) {
+ struct osockaddr *osa =
+ (struct osockaddr *)&ifr.ifr_addr;
+ ifr.ifr_addr = *sa;
+ osa->sa_family = sa->sa_family;
+ error = copyout((caddr_t)&ifr, (caddr_t)ifrp,
+ sizeof (ifr));
+ ifrp++;
+ } else
+#endif
+ if (sa->sa_len <= sizeof(*sa)) {
+ ifr.ifr_addr = *sa;
+ error = copyout((caddr_t)&ifr, (caddr_t)ifrp,
+ sizeof (ifr));
+ ifrp++;
+ } else {
+ space -= sa->sa_len - sizeof(*sa);
+ if (space < sizeof (ifr))
+ break;
+ error = copyout((caddr_t)&ifr, (caddr_t)ifrp,
+ sizeof (ifr.ifr_name));
+ if (error == 0)
+ error = copyout((caddr_t)sa,
+ (caddr_t)&ifrp->ifr_addr, sa->sa_len);
+ ifrp = (struct ifreq *)
+ (sa->sa_len + (caddr_t)&ifrp->ifr_addr);
+ }
+ if (error)
+ break;
+ space -= sizeof (ifr);
+ }
+ }
+ ifc->ifc_len -= space;
+ return (error);