4.3BSD-Reno/src/sys/netns/ns.c
/*
* Copyright (c) 1984, 1985, 1986, 1987 Regents of the University of California.
* All rights reserved.
*
* Redistribution is only permitted until one year after the first shipment
* of 4.4BSD by the Regents. Otherwise, redistribution and use in source and
* binary forms are permitted provided that: (1) source distributions retain
* this entire copyright notice and comment, and (2) distributions including
* binaries display the following acknowledgement: This product includes
* software developed by the University of California, Berkeley and its
* contributors'' in the documentation or other materials provided with the
* distribution and in all advertising materials mentioning features or use
* of this software. Neither the name of the University nor the names of
* its contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*
* @(#)ns.c 7.7 (Berkeley) 6/28/90
*/
#include "param.h"
#include "mbuf.h"
#include "ioctl.h"
#include "protosw.h"
#include "socket.h"
#include "socketvar.h"
#include "user.h"
#include "../net/if.h"
#include "../net/route.h"
#include "../net/af.h"
#include "ns.h"
#include "ns_if.h"
#ifdef NS
struct ns_ifaddr *ns_ifaddr;
int ns_interfaces;
extern struct sockaddr_ns ns_netmask, ns_hostmask;
/*
* Generic internet control operations (ioctl's).
*/
/* ARGSUSED */
ns_control(so, cmd, data, ifp)
struct socket *so;
int cmd;
caddr_t data;
register struct ifnet *ifp;
{
register struct ifreq *ifr = (struct ifreq *)data;
register struct ns_aliasreq *ifra = (struct ns_aliasreq *)data;
register struct ns_ifaddr *ia;
struct ifaddr *ifa;
struct ns_ifaddr *oia;
struct mbuf *m;
int error, dstIsNew, hostIsNew;
/*
* Find address for this interface, if it exists.
*/
if (ifp == 0)
return (EADDRNOTAVAIL);
for (ia = ns_ifaddr; ia; ia = ia->ia_next)
if (ia->ia_ifp == ifp)
break;
switch (cmd) {
case SIOCGIFADDR:
if (ia == (struct ns_ifaddr *)0)
return (EADDRNOTAVAIL);
*(struct sockaddr_ns *)&ifr->ifr_addr = ia->ia_addr;
return (0);
case SIOCGIFBRDADDR:
if (ia == (struct ns_ifaddr *)0)
return (EADDRNOTAVAIL);
if ((ifp->if_flags & IFF_BROADCAST) == 0)
return (EINVAL);
*(struct sockaddr_ns *)&ifr->ifr_dstaddr = ia->ia_broadaddr;
return (0);
case SIOCGIFDSTADDR:
if (ia == (struct ns_ifaddr *)0)
return (EADDRNOTAVAIL);
if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
return (EINVAL);
*(struct sockaddr_ns *)&ifr->ifr_dstaddr = ia->ia_dstaddr;
return (0);
}
if (error = suser(u.u_cred, &u.u_acflag))
return (error);
switch (cmd) {
case SIOCAIFADDR:
case SIOCDIFADDR:
if (ifra->ifra_addr.sns_family == AF_NS)
for (oia = ia; ia; ia = ia->ia_next) {
if (ia->ia_ifp == ifp &&
ns_neteq(ia->ia_addr.sns_addr,
ifra->ifra_addr.sns_addr))
break;
}
if (cmd == SIOCDIFADDR && ia == 0)
return (EADDRNOTAVAIL);
/* FALLTHROUGH */
case SIOCSIFADDR:
case SIOCSIFDSTADDR:
if (ia == (struct ns_ifaddr *)0) {
m = m_getclr(M_WAIT, MT_IFADDR);
if (m == (struct mbuf *)NULL)
return (ENOBUFS);
if (ia = ns_ifaddr) {
for ( ; ia->ia_next; ia = ia->ia_next)
;
ia->ia_next = mtod(m, struct ns_ifaddr *);
} else
ns_ifaddr = mtod(m, struct ns_ifaddr *);
ia = mtod(m, struct ns_ifaddr *);
if (ifa = ifp->if_addrlist) {
for ( ; ifa->ifa_next; ifa = ifa->ifa_next)
;
ifa->ifa_next = (struct ifaddr *) ia;
} else
ifp->if_addrlist = (struct ifaddr *) ia;
ia->ia_ifp = ifp;
ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
ia->ia_ifa.ifa_netmask =
(struct sockaddr *)&ns_netmask;
ia->ia_ifa.ifa_dstaddr =
(struct sockaddr *)&ia->ia_dstaddr;
if (ifp->if_flags & IFF_BROADCAST) {
ia->ia_broadaddr.sns_family = AF_NS;
ia->ia_broadaddr.sns_len = sizeof(ia->ia_addr);
ia->ia_broadaddr.sns_addr.x_host = ns_broadhost;
}
ns_interfaces++;
}
}
switch (cmd) {
int error;
case SIOCSIFDSTADDR:
if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
return (EINVAL);
if (ia->ia_flags & IFA_ROUTE) {
rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST);
ia->ia_flags &= ~IFA_ROUTE;
}
if (ifp->if_ioctl) {
error = (*ifp->if_ioctl)(ifp, SIOCSIFDSTADDR, ia);
if (error)
return (error);
}
*(struct sockaddr *)&ia->ia_dstaddr = ifr->ifr_dstaddr;
return (0);
case SIOCSIFADDR:
return (ns_ifinit(ifp, ia,
(struct sockaddr_ns *)&ifr->ifr_addr, 1));
case SIOCDIFADDR:
ns_ifscrub(ifp, ia);
if ((ifa = ifp->if_addrlist) == (struct ifaddr *)ia)
ifp->if_addrlist = ifa->ifa_next;
else {
while (ifa->ifa_next &&
(ifa->ifa_next != (struct ifaddr *)ia))
ifa = ifa->ifa_next;
if (ifa->ifa_next)
ifa->ifa_next = ((struct ifaddr *)ia)->ifa_next;
else
printf("Couldn't unlink nsifaddr from ifp\n");
}
oia = ia;
if (oia == (ia = ns_ifaddr)) {
ns_ifaddr = ia->ia_next;
} else {
while (ia->ia_next && (ia->ia_next != oia)) {
ia = ia->ia_next;
}
if (ia->ia_next)
ia->ia_next = oia->ia_next;
else
printf("Didn't unlink nsifadr from list\n");
}
(void) m_free(dtom(oia));
if (0 == --ns_interfaces) {
/*
* We reset to virginity and start all over again
*/
ns_thishost = ns_zerohost;
}
return (0);
case SIOCAIFADDR:
dstIsNew = 0; hostIsNew = 1;
if (ia->ia_addr.sns_family == AF_NS) {
if (ifra->ifra_addr.sns_len == 0) {
ifra->ifra_addr = ia->ia_addr;
hostIsNew = 0;
} else if (ns_neteq(ifra->ifra_addr.sns_addr,
ia->ia_addr.sns_addr))
hostIsNew = 0;
}
if ((ifp->if_flags & IFF_POINTOPOINT) &&
(ifra->ifra_dstaddr.sns_family == AF_NS)) {
if (hostIsNew == 0)
ns_ifscrub(ifp, ia);
ia->ia_dstaddr = ifra->ifra_dstaddr;
dstIsNew = 1;
}
if (ifra->ifra_addr.sns_family == AF_NS &&
(hostIsNew || dstIsNew))
error = ns_ifinit(ifp, ia, &ifra->ifra_addr, 0);
return (error);
default:
if (ifp->if_ioctl == 0)
return (EOPNOTSUPP);
return ((*ifp->if_ioctl)(ifp, cmd, data));
}
}
/*
* Delete any previous route for an old address.
*/
ns_ifscrub(ifp, ia)
register struct ifnet *ifp;
register struct ns_ifaddr *ia;
{
if (ia->ia_flags & IFA_ROUTE) {
if (ifp->if_flags & IFF_POINTOPOINT) {
rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST);
} else
rtinit(&(ia->ia_ifa), (int)RTM_DELETE, 0);
ia->ia_flags &= ~IFA_ROUTE;
}
}
/*
* Initialize an interface's internet address
* and routing table entry.
*/
ns_ifinit(ifp, ia, sns, scrub)
register struct ifnet *ifp;
register struct ns_ifaddr *ia;
register struct sockaddr_ns *sns;
{
struct sockaddr_ns oldaddr;
register union ns_host *h = &ia->ia_addr.sns_addr.x_host;
int s = splimp(), error;
/*
* Set up new addresses.
*/
oldaddr = ia->ia_addr;
ia->ia_addr = *sns;
/*
* The convention we shall adopt for naming is that
* a supplied address of zero means that "we don't care".
* if there is a single interface, use the address of that
* interface as our 6 byte host address.
* if there are multiple interfaces, use any address already
* used.
*
* Give the interface a chance to initialize
* if this is its first address,
* and to validate the address if necessary.
*/
if (ns_hosteqnh(ns_thishost, ns_zerohost)) {
if (ifp->if_ioctl &&
(error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, ia))) {
ia->ia_addr = oldaddr;
splx(s);
return (error);
}
ns_thishost = *h;
} else if (ns_hosteqnh(sns->sns_addr.x_host, ns_zerohost)
|| ns_hosteqnh(sns->sns_addr.x_host, ns_thishost)) {
*h = ns_thishost;
if (ifp->if_ioctl &&
(error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, ia))) {
ia->ia_addr = oldaddr;
splx(s);
return (error);
}
if (!ns_hosteqnh(ns_thishost,*h)) {
ia->ia_addr = oldaddr;
splx(s);
return (EINVAL);
}
} else {
ia->ia_addr = oldaddr;
splx(s);
return (EINVAL);
}
/*
* Add route for the network.
*/
if (scrub) {
ia->ia_ifa.ifa_addr = (struct sockaddr *)&oldaddr;
ns_ifscrub(ifp, ia);
ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
}
if (ifp->if_flags & IFF_POINTOPOINT)
rtinit(&(ia->ia_ifa), (int)RTM_ADD, RTF_HOST|RTF_UP);
else {
ia->ia_broadaddr.sns_addr.x_net = ia->ia_net;
rtinit(&(ia->ia_ifa), (int)RTM_ADD, RTF_UP);
}
ia->ia_flags |= IFA_ROUTE;
return (0);
}
/*
* Return address info for specified internet network.
*/
struct ns_ifaddr *
ns_iaonnetof(dst)
register struct ns_addr *dst;
{
register struct ns_ifaddr *ia;
register struct ns_addr *compare;
register struct ifnet *ifp;
struct ns_ifaddr *ia_maybe = 0;
union ns_net net = dst->x_net;
for (ia = ns_ifaddr; ia; ia = ia->ia_next) {
if (ifp = ia->ia_ifp) {
if (ifp->if_flags & IFF_POINTOPOINT) {
compare = &satons_addr(ia->ia_dstaddr);
if (ns_hosteq(*dst, *compare))
return (ia);
if (ns_neteqnn(net, ia->ia_net))
ia_maybe = ia;
} else {
if (ns_neteqnn(net, ia->ia_net))
return (ia);
}
}
}
return (ia_maybe);
}
#endif