BSD 4.4 Lite Kernel Sources

1 files changed, 368 insertions, 0 deletions

diff --git a/sys/netns/ns.c b/sys/netns/ns.c
new file mode 100644
index 0000000..8b76543
--- /dev/null
+++ b/sys/netns/ns.c
@@ -0,0 +1,368 @@
+/*
+ * Copyright (c) 1984, 1985, 1986, 1987, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. 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 BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)ns.c	8.2 (Berkeley) 11/15/93
+ */
+
+#include <sys/param.h>
+#include <sys/mbuf.h>
+#include <sys/ioctl.h>
+#include <sys/protosw.h>
+#include <sys/errno.h>
+#include <sys/socket.h>
+#include <sys/socketvar.h>
+
+#include <net/if.h>
+#include <net/route.h>
+
+#include <netns/ns.h>
+#include <netns/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;
+	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 ((so->so_state & SS_PRIV) == 0)
+		return (EPERM);
+
+	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) {
+			oia = (struct ns_ifaddr *)
+				malloc(sizeof *ia, M_IFADDR, M_WAITOK);
+			if (oia == (struct ns_ifaddr *)NULL)
+				return (ENOBUFS);
+			bzero((caddr_t)oia, sizeof(*oia));
+			if (ia = ns_ifaddr) {
+				for ( ; ia->ia_next; ia = ia->ia_next)
+					;
+				ia->ia_next = oia;
+			} else
+				ns_ifaddr = oia;
+			ia = oia;
+			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");
+		}
+		IFAFREE((&oia->ia_ifa));
+		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);
+	}
+	ia->ia_ifa.ifa_metric = ifp->if_metric;
+	/*
+	 * 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_addr.sns_addr.x_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_addr.sns_addr.x_net))
+					ia_maybe = ia;
+			} else {
+				if (ns_neteqnn(net, ia->ia_addr.sns_addr.x_net))
+					return (ia);
+			}
+		}
+	}
+	return (ia_maybe);
+}
+#endif