371 lines
9.8 KiB
C
371 lines
9.8 KiB
C
/* $NetBSD: ns.c,v 1.7 1995/02/01 09:10:38 mycroft Exp $ */
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/*
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* Copyright (c) 1984, 1985, 1986, 1987, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)ns.c 8.2 (Berkeley) 11/15/93
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*/
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#include <sys/param.h>
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#include <sys/mbuf.h>
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#include <sys/ioctl.h>
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#include <sys/protosw.h>
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#include <sys/errno.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <net/if.h>
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#include <net/route.h>
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#include <netns/ns.h>
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#include <netns/ns_if.h>
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#ifdef NS
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struct ns_ifaddr *ns_ifaddr;
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int ns_interfaces;
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extern struct sockaddr_ns ns_netmask, ns_hostmask;
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/*
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* Generic internet control operations (ioctl's).
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*/
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/* ARGSUSED */
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ns_control(so, cmd, data, ifp)
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struct socket *so;
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int cmd;
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caddr_t data;
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register struct ifnet *ifp;
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{
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register struct ifreq *ifr = (struct ifreq *)data;
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register struct ns_aliasreq *ifra = (struct ns_aliasreq *)data;
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register struct ns_ifaddr *ia;
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struct ifaddr *ifa;
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struct ns_ifaddr *oia;
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int error, dstIsNew, hostIsNew;
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/*
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* Find address for this interface, if it exists.
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*/
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if (ifp == 0)
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return (EADDRNOTAVAIL);
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for (ia = ns_ifaddr; ia; ia = ia->ia_next)
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if (ia->ia_ifp == ifp)
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break;
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switch (cmd) {
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case SIOCGIFADDR:
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if (ia == (struct ns_ifaddr *)0)
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return (EADDRNOTAVAIL);
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*(struct sockaddr_ns *)&ifr->ifr_addr = ia->ia_addr;
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return (0);
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case SIOCGIFBRDADDR:
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if (ia == (struct ns_ifaddr *)0)
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return (EADDRNOTAVAIL);
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if ((ifp->if_flags & IFF_BROADCAST) == 0)
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return (EINVAL);
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*(struct sockaddr_ns *)&ifr->ifr_dstaddr = ia->ia_broadaddr;
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return (0);
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case SIOCGIFDSTADDR:
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if (ia == (struct ns_ifaddr *)0)
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return (EADDRNOTAVAIL);
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if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
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return (EINVAL);
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*(struct sockaddr_ns *)&ifr->ifr_dstaddr = ia->ia_dstaddr;
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return (0);
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}
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if ((so->so_state & SS_PRIV) == 0)
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return (EPERM);
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switch (cmd) {
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case SIOCAIFADDR:
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case SIOCDIFADDR:
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if (ifra->ifra_addr.sns_family == AF_NS)
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for (oia = ia; ia; ia = ia->ia_next) {
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if (ia->ia_ifp == ifp &&
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ns_neteq(ia->ia_addr.sns_addr,
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ifra->ifra_addr.sns_addr))
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break;
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}
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if (cmd == SIOCDIFADDR && ia == 0)
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return (EADDRNOTAVAIL);
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/* FALLTHROUGH */
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case SIOCSIFADDR:
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case SIOCSIFDSTADDR:
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if (ia == (struct ns_ifaddr *)0) {
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oia = (struct ns_ifaddr *)
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malloc(sizeof *ia, M_IFADDR, M_WAITOK);
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if (oia == (struct ns_ifaddr *)NULL)
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return (ENOBUFS);
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bzero((caddr_t)oia, sizeof(*oia));
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if (ia = ns_ifaddr) {
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for ( ; ia->ia_next; ia = ia->ia_next)
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;
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ia->ia_next = oia;
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} else
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ns_ifaddr = oia;
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ia = oia;
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if (ifa = ifp->if_addrlist) {
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for ( ; ifa->ifa_next; ifa = ifa->ifa_next)
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;
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ifa->ifa_next = (struct ifaddr *) ia;
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} else
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ifp->if_addrlist = (struct ifaddr *) ia;
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ia->ia_ifp = ifp;
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ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
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ia->ia_ifa.ifa_netmask =
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(struct sockaddr *)&ns_netmask;
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ia->ia_ifa.ifa_dstaddr =
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(struct sockaddr *)&ia->ia_dstaddr;
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if (ifp->if_flags & IFF_BROADCAST) {
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ia->ia_broadaddr.sns_family = AF_NS;
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ia->ia_broadaddr.sns_len = sizeof(ia->ia_addr);
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ia->ia_broadaddr.sns_addr.x_host = ns_broadhost;
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}
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ns_interfaces++;
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}
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}
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switch (cmd) {
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int error;
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case SIOCSIFDSTADDR:
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if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
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return (EINVAL);
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if (ia->ia_flags & IFA_ROUTE) {
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rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST);
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ia->ia_flags &= ~IFA_ROUTE;
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}
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if (ifp->if_ioctl) {
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error = (*ifp->if_ioctl)(ifp, SIOCSIFDSTADDR,
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(caddr_t)ia);
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if (error)
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return (error);
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}
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*(struct sockaddr *)&ia->ia_dstaddr = ifr->ifr_dstaddr;
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return (0);
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case SIOCSIFADDR:
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return (ns_ifinit(ifp, ia,
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(struct sockaddr_ns *)&ifr->ifr_addr, 1));
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case SIOCDIFADDR:
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ns_ifscrub(ifp, ia);
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if ((ifa = ifp->if_addrlist) == (struct ifaddr *)ia)
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ifp->if_addrlist = ifa->ifa_next;
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else {
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while (ifa->ifa_next &&
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(ifa->ifa_next != (struct ifaddr *)ia))
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ifa = ifa->ifa_next;
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if (ifa->ifa_next)
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ifa->ifa_next = ((struct ifaddr *)ia)->ifa_next;
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else
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printf("Couldn't unlink nsifaddr from ifp\n");
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}
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oia = ia;
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if (oia == (ia = ns_ifaddr)) {
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ns_ifaddr = ia->ia_next;
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} else {
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while (ia->ia_next && (ia->ia_next != oia)) {
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ia = ia->ia_next;
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}
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if (ia->ia_next)
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ia->ia_next = oia->ia_next;
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else
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printf("Didn't unlink nsifadr from list\n");
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}
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IFAFREE((&oia->ia_ifa));
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if (0 == --ns_interfaces) {
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/*
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* We reset to virginity and start all over again
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*/
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ns_thishost = ns_zerohost;
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}
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return (0);
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case SIOCAIFADDR:
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dstIsNew = 0; hostIsNew = 1;
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if (ia->ia_addr.sns_family == AF_NS) {
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if (ifra->ifra_addr.sns_len == 0) {
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ifra->ifra_addr = ia->ia_addr;
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hostIsNew = 0;
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} else if (ns_neteq(ifra->ifra_addr.sns_addr,
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ia->ia_addr.sns_addr))
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hostIsNew = 0;
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}
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if ((ifp->if_flags & IFF_POINTOPOINT) &&
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(ifra->ifra_dstaddr.sns_family == AF_NS)) {
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if (hostIsNew == 0)
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ns_ifscrub(ifp, ia);
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ia->ia_dstaddr = ifra->ifra_dstaddr;
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dstIsNew = 1;
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}
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if (ifra->ifra_addr.sns_family == AF_NS &&
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(hostIsNew || dstIsNew))
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error = ns_ifinit(ifp, ia, &ifra->ifra_addr, 0);
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return (error);
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default:
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if (ifp->if_ioctl == 0)
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return (EOPNOTSUPP);
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return ((*ifp->if_ioctl)(ifp, cmd, data));
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}
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}
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/*
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* Delete any previous route for an old address.
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*/
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ns_ifscrub(ifp, ia)
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register struct ifnet *ifp;
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register struct ns_ifaddr *ia;
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{
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if (ia->ia_flags & IFA_ROUTE) {
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if (ifp->if_flags & IFF_POINTOPOINT) {
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rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST);
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} else
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rtinit(&(ia->ia_ifa), (int)RTM_DELETE, 0);
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ia->ia_flags &= ~IFA_ROUTE;
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}
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}
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/*
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* Initialize an interface's internet address
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* and routing table entry.
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*/
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ns_ifinit(ifp, ia, sns, scrub)
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register struct ifnet *ifp;
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register struct ns_ifaddr *ia;
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register struct sockaddr_ns *sns;
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{
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struct sockaddr_ns oldaddr;
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register union ns_host *h = &ia->ia_addr.sns_addr.x_host;
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int s = splimp(), error;
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/*
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* Set up new addresses.
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*/
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oldaddr = ia->ia_addr;
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ia->ia_addr = *sns;
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/*
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* The convention we shall adopt for naming is that
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* a supplied address of zero means that "we don't care".
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* if there is a single interface, use the address of that
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* interface as our 6 byte host address.
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* if there are multiple interfaces, use any address already
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* used.
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*
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* Give the interface a chance to initialize
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* if this is its first address,
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* and to validate the address if necessary.
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*/
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if (ns_hosteqnh(ns_thishost, ns_zerohost)) {
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if (ifp->if_ioctl &&
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(error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR,
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(caddr_t)ia)))
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goto bad;
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ns_thishost = *h;
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} else if (ns_hosteqnh(sns->sns_addr.x_host, ns_zerohost)
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|| ns_hosteqnh(sns->sns_addr.x_host, ns_thishost)) {
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*h = ns_thishost;
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if (ifp->if_ioctl &&
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(error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR,
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(caddr_t)ia)))
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goto bad;
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if (!ns_hosteqnh(ns_thishost, *h)) {
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error = EINVAL;
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goto bad;
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}
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} else {
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error = EINVAL;
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goto bad;
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}
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ia->ia_ifa.ifa_metric = ifp->if_metric;
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/*
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* Add route for the network.
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*/
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if (scrub) {
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ia->ia_ifa.ifa_addr = (struct sockaddr *)&oldaddr;
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ns_ifscrub(ifp, ia);
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ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
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}
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if (ifp->if_flags & IFF_POINTOPOINT)
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rtinit(&(ia->ia_ifa), (int)RTM_ADD, RTF_HOST|RTF_UP);
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else {
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ia->ia_broadaddr.sns_addr.x_net = ia->ia_addr.sns_addr.x_net;
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rtinit(&(ia->ia_ifa), (int)RTM_ADD, RTF_UP);
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}
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ia->ia_flags |= IFA_ROUTE;
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splx(s);
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return (0);
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bad:
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ia->ia_addr = oldaddr;
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splx(s);
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return (error);
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}
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/*
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* Return address info for specified internet network.
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*/
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struct ns_ifaddr *
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ns_iaonnetof(dst)
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register struct ns_addr *dst;
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{
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register struct ns_ifaddr *ia;
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register struct ns_addr *compare;
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register struct ifnet *ifp;
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struct ns_ifaddr *ia_maybe = 0;
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union ns_net net = dst->x_net;
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for (ia = ns_ifaddr; ia; ia = ia->ia_next) {
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if (ifp = ia->ia_ifp) {
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if (ifp->if_flags & IFF_POINTOPOINT) {
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compare = &satons_addr(ia->ia_dstaddr);
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if (ns_hosteq(*dst, *compare))
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return (ia);
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if (ns_neteqnn(net, ia->ia_addr.sns_addr.x_net))
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ia_maybe = ia;
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} else {
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if (ns_neteqnn(net, ia->ia_addr.sns_addr.x_net))
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return (ia);
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}
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}
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}
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return (ia_maybe);
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}
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#endif
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