+/* ns.c 6.1 85/05/30 */
+
+#include "param.h"
+#include "mbuf.h"
+#include "ioctl.h"
+#include "protosw.h"
+#include "socket.h"
+#include "socketvar.h"
+#include "uio.h"
+#include "dir.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;
+
+ns_hash(sns, hp)
+ register struct sockaddr_ns *sns;
+ struct afhash *hp;
+{
+ register long hash = 0;
+ register u_short *s = sns->sns_addr.x_host.s_host;
+
+ hp->afh_nethash = ns_netof(sns->sns_addr);
+ hash = *s++; hash <<= 8; hash += *s++; hash <<= 8; hash += *s;
+ hp->afh_hosthash = hash;
+}
+
+
+ns_netmatch(sns1, sns2)
+ struct sockaddr_ns *sns1, *sns2;
+{
+
+ return (ns_netof(sns1->sns_addr) == ns_netof(sns2->sns_addr));
+}
+
+/*
+ * Generic internet control operations (ioctl's).
+ */
+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_ifaddr *ia;
+ struct ifaddr *ifa;
+ struct mbuf *m;
+ int error;
+
+ if (!suser())
+ return (u.u_error);
+
+ /*
+ * Find address for this interface, if it exists.
+ */
+ for (ia = ns_ifaddr; ia; ia = ia->ia_next)
+ if (ia->ia_ifp == ifp)
+ break;
+
+ switch (cmd) {
+
+ case SIOCGIFADDR:
+ case SIOCGIFBRDADDR:
+ case SIOCGIFDSTADDR:
+ if (ia == (struct ns_ifaddr *)0)
+ return (EADDRNOTAVAIL);
+ break;
+
+ case SIOCSIFDSTADDR:
+ return (EOPNOTSUPP);
+
+ case SIOCSIFADDR:
+ 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_SNS(ia)->sns_family = AF_NS;
+ }
+ break;
+ }
+
+ switch (cmd) {
+
+ case SIOCGIFADDR:
+ ifr->ifr_addr = ia->ia_addr;
+ break;
+
+ case SIOCGIFBRDADDR:
+ if (ia == (struct ns_ifaddr *)0)
+ return (EADDRNOTAVAIL);
+ if ((ifp->if_flags & IFF_BROADCAST) == 0)
+ return (EINVAL);
+ ifr->ifr_dstaddr = ia->ia_broadaddr;
+ break;
+
+ case SIOCGIFDSTADDR:
+ if (ia == (struct ns_ifaddr *)0)
+ return (EADDRNOTAVAIL);
+ if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
+ return (EINVAL);
+ ifr->ifr_dstaddr = ia->ia_dstaddr;
+ break;
+
+ case SIOCSIFADDR:
+ return
+ (ns_ifinit(ifp, ia, (struct sockaddr_ns *)&ifr->ifr_addr));
+
+ default:
+ if (ifp->if_ioctl == 0)
+ return (EOPNOTSUPP);
+ return ((*ifp->if_ioctl)(ifp, cmd, data));
+ }
+ return (0);
+}
+
+/*
+ * Initialize an interface's internet address
+ * and routing table entry.
+ */
+ns_ifinit(ifp, ia, sns)
+ register struct ifnet *ifp;
+ register struct ns_ifaddr *ia;
+ struct sockaddr_ns *sns;
+{
+ struct sockaddr_ns netaddr;
+ register union ns_host *h = &(IA_SNS(ia)->sns_addr.x_host);
+ int s = splimp(), error;
+
+ /*
+ * 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.
+ *
+ * If we have gotten into trouble and want to reset back to
+ * virginity, we recognize a request of the broadcast address.
+ */
+ if (ns_hosteqnh(sns->sns_addr.x_host, ns_broadhost)) {
+ ns_thishost = ns_zerohost;
+ splx(s);
+ return(EINVAL);
+ }
+
+ /*
+ * Delete any previous route for an old address.
+ */
+
+ bzero((caddr_t)&netaddr, sizeof (netaddr));
+ netaddr.sns_family = AF_NS;
+ netaddr.sns_addr.x_host = ns_broadhost;
+ netaddr.sns_addr.x_net = ia->ia_net;
+ if (ia->ia_flags & IFA_ROUTE) {
+ if ((ifp->if_flags & IFF_POINTOPOINT) == 0) {
+ rtinit((struct sockaddr *)&netaddr, &ia->ia_addr, -1);
+ } else
+ rtinit((struct sockaddr *)&ia->ia_dstaddr, &ia->ia_addr, -1);
+ }
+
+ /*
+ * Set up new addresses.
+ */
+ ia->ia_addr = *(struct sockaddr *)sns;
+ ia->ia_net = sns->sns_addr.x_net;
+ netaddr.sns_addr.x_net = ia->ia_net;
+ if (ifp->if_flags & IFF_BROADCAST) {
+ ia->ia_broadaddr = * (struct sockaddr *) &netaddr;
+ }
+ /*
+ * Point to point links are a little touchier --
+ * We have to have an address of our own first,
+ * and will use the supplied address as that of the other end.
+ */
+ if (ifp->if_flags & IFF_POINTOPOINT) {
+ struct sockaddr_ns *sns2 = IA_SNS(ia);
+ if (ns_hosteqnh(ns_zerohost,ns_thishost))
+ return(EINVAL);
+ ia->ia_dstaddr = ia->ia_addr;
+ sns2->sns_addr.x_host = ns_thishost;
+ sns->sns_addr.x_host = ns_thishost;
+ }
+ /*
+ * 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))) {
+ 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))) {
+ splx(s);
+ return (error);
+ }
+ if(!ns_hosteqnh(ns_thishost,*h)) {
+ splx(s);
+ return (EINVAL);
+ }
+ } else {
+ splx(s);
+ return(EINVAL);
+ }
+ /*
+ * Add route for the network.
+ */
+ if ((ifp->if_flags & IFF_POINTOPOINT) == 0) {
+ rtinit((struct sockaddr *)&netaddr, &ia->ia_addr, RTF_UP);
+ } else
+ rtinit((struct sockaddr *)&ia->ia_dstaddr, &ia->ia_addr,
+ RTF_HOST|RTF_UP);
+ ia->ia_flags |= IFA_ROUTE;
+ return(0);
+}
+
+/*
+ * Return address info for specified internet network.
+ */
+struct ns_ifaddr *
+ns_iaonnetof(net)
+ union ns_net net;
+{
+ register struct ns_ifaddr *ia;
+
+#define NtoL(x) (*(long *)(&(x)))
+ for (ia = ns_ifaddr; ia; ia = ia->ia_next)
+ if (NtoL(ia->ia_net) == NtoL(net))
+ return (ia);
+ return ((struct ns_ifaddr *)0);
+}
+#endif
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