Finish driving a stake through the heart of netns and the associated

ifdefs scattered around the place - its dead Jim!

The SMB stuff had stolen AF_NS, make it official.

22 files changed, 0 insertions, 6041 deletions

diff --git a/sys/netns/idp.h b/sys/netns/idp.h
deleted file mode 100644
index e832756..0000000
--- a/sys/netns/idp.h
+++ /dev/null
@@ -1,52 +0,0 @@
-/*
- * 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.
- *
- *	@(#)idp.h	8.1 (Berkeley) 6/10/93
- * $FreeBSD$
- */
-
-#ifndef _NETNS_IDP_H_
-#define _NETNS_IDP_H_
-
-/*
- * Definitions for NS(tm) Internet Datagram Protocol
- */
-struct idp {
-	u_short	idp_sum;	/* Checksum */
-	u_short	idp_len;	/* Length, in bytes, including header */
-	u_char	idp_tc;		/* Transport Control (i.e. hop count) */
-	u_char	idp_pt;		/* Packet Type (i.e. level 2 protocol) */
-	struct ns_addr	idp_dna;	/* Destination Network Address */
-	struct ns_addr	idp_sna;	/* Source Network Address */
-};
-
-#endif
diff --git a/sys/netns/idp_usrreq.c b/sys/netns/idp_usrreq.c
deleted file mode 100644
index 2642d1a..0000000
--- a/sys/netns/idp_usrreq.c
+++ /dev/null
@@ -1,562 +0,0 @@
-/*
- * 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.
- *
- *	@(#)idp_usrreq.c	8.1 (Berkeley) 6/10/93
- * $FreeBSD$
- */
-
-#include <sys/param.h>
-#include <sys/systm.h>
-#include <sys/malloc.h>
-#include <sys/mbuf.h>
-#include <sys/protosw.h>
-#include <sys/socket.h>
-#include <sys/socketvar.h>
-#include <sys/errno.h>
-#include <sys/stat.h>
-
-#include <net/if.h>
-#include <net/route.h>
-
-#include <netns/ns.h>
-#include <netns/ns_pcb.h>
-#include <netns/ns_if.h>
-#include <netns/idp.h>
-#include <netns/idp_var.h>
-#include <netns/ns_error.h>
-
-/*
- * IDP protocol implementation.
- */
-
-struct	sockaddr_ns idp_ns = { sizeof(idp_ns), AF_NS };
-
-/*
- *  This may also be called for raw listeners.
- */
-idp_input(m, nsp)
-	struct mbuf *m;
-	register struct nspcb *nsp;
-{
-	register struct idp *idp = mtod(m, struct idp *);
-	struct ifnet *ifp = m->m_pkthdr.rcvif;
-
-	if (nsp==0)
-		panic("No nspcb");
-	/*
-	 * Construct sockaddr format source address.
-	 * Stuff source address and datagram in user buffer.
-	 */
-	idp_ns.sns_addr = idp->idp_sna;
-	if (ns_neteqnn(idp->idp_sna.x_net, ns_zeronet) && ifp) {
-		register struct ifaddr *ifa;
-
-		for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next) {
-			if (ifa->ifa_addr->sa_family == AF_NS) {
-				idp_ns.sns_addr.x_net =
-					IA_SNS(ifa)->sns_addr.x_net;
-				break;
-			}
-		}
-	}
-	nsp->nsp_rpt = idp->idp_pt;
-	if ( ! (nsp->nsp_flags & NSP_RAWIN) ) {
-		m->m_len -= sizeof (struct idp);
-		m->m_pkthdr.len -= sizeof (struct idp);
-		m->m_data += sizeof (struct idp);
-	}
-	if (sbappendaddr(&nsp->nsp_socket->so_rcv, (struct sockaddr *)&idp_ns,
-	    m, (struct mbuf *)0) == 0)
-		goto bad;
-	sorwakeup(nsp->nsp_socket);
-	return;
-bad:
-	m_freem(m);
-}
-
-idp_abort(nsp)
-	struct nspcb *nsp;
-{
-	struct socket *so = nsp->nsp_socket;
-
-	ns_pcbdisconnect(nsp);
-	soisdisconnected(so);
-}
-/*
- * Drop connection, reporting
- * the specified error.
- */
-struct nspcb *
-idp_drop(nsp, errno)
-	register struct nspcb *nsp;
-	int errno;
-{
-	struct socket *so = nsp->nsp_socket;
-
-	/*
-	 * someday, in the xerox world
-	 * we will generate error protocol packets
-	 * announcing that the socket has gone away.
-	 */
-	/*if (TCPS_HAVERCVDSYN(tp->t_state)) {
-		tp->t_state = TCPS_CLOSED;
-		(void) tcp_output(tp);
-	}*/
-	so->so_error = errno;
-	ns_pcbdisconnect(nsp);
-	soisdisconnected(so);
-}
-
-int noIdpRoute;
-idp_output(nsp, m0)
-	struct nspcb *nsp;
-	struct mbuf *m0;
-{
-	register struct mbuf *m;
-	register struct idp *idp;
-	register struct socket *so;
-	register int len;
-	register struct route *ro;
-	struct mbuf *mprev;
-	extern int idpcksum;
-
-	len = m_length(m0, &mprev);
-	/*
-	 * Make sure packet is actually of even length.
-	 */
-
-	if (len & 1) {
-		m = mprev;
-		if ((m->m_flags & M_EXT) == 0 &&
-			(m->m_len + m->m_data < &m->m_dat[MLEN])) {
-			m->m_len++;
-		} else {
-			struct mbuf *m1 = m_get(M_DONTWAIT, MT_DATA);
-
-			if (m1 == 0) {
-				m_freem(m0);
-				return (ENOBUFS);
-			}
-			m1->m_len = 1;
-			* mtod(m1, char *) = 0;
-			m->m_next = m1;
-		}
-		m0->m_pkthdr.len++;
-	}
-
-	/*
-	 * Fill in mbuf with extended IDP header
-	 * and addresses and length put into network format.
-	 */
-	m = m0;
-	if (nsp->nsp_flags & NSP_RAWOUT) {
-		idp = mtod(m, struct idp *);
-	} else {
-		M_PREPEND(m, sizeof (struct idp), M_DONTWAIT);
-		if (m == 0)
-			return (ENOBUFS);
-		idp = mtod(m, struct idp *);
-		idp->idp_tc = 0;
-		idp->idp_pt = nsp->nsp_dpt;
-		idp->idp_sna = nsp->nsp_laddr;
-		idp->idp_dna = nsp->nsp_faddr;
-		len += sizeof (struct idp);
-	}
-
-	idp->idp_len = htons((u_short)len);
-
-	if (idpcksum) {
-		idp->idp_sum = 0;
-		len = ((len - 1) | 1) + 1;
-		idp->idp_sum = ns_cksum(m, len);
-	} else
-		idp->idp_sum = 0xffff;
-
-	/*
-	 * Output datagram.
-	 */
-	so = nsp->nsp_socket;
-	if (so->so_options & SO_DONTROUTE)
-		return (ns_output(m, (struct route *)0,
-		    (so->so_options & SO_BROADCAST) | NS_ROUTETOIF));
-	/*
-	 * Use cached route for previous datagram if
-	 * possible.  If the previous net was the same
-	 * and the interface was a broadcast medium, or
-	 * if the previous destination was identical,
-	 * then we are ok.
-	 *
-	 * NB: We don't handle broadcasts because that
-	 *     would require 3 subroutine calls.
-	 */
-	ro = &nsp->nsp_route;
-#ifdef ancient_history
-	/*
-	 * I think that this will all be handled in ns_pcbconnect!
-	 */
-	if (ro->ro_rt) {
-		if(ns_neteq(nsp->nsp_lastdst, idp->idp_dna)) {
-			/*
-			 * This assumes we have no GH type routes
-			 */
-			if (ro->ro_rt->rt_flags & RTF_HOST) {
-				if (!ns_hosteq(nsp->nsp_lastdst, idp->idp_dna))
-					goto re_route;
-
-			}
-			if ((ro->ro_rt->rt_flags & RTF_GATEWAY) == 0) {
-				register struct ns_addr *dst =
-						&satons_addr(ro->ro_dst);
-				dst->x_host = idp->idp_dna.x_host;
-			}
-			/*
-			 * Otherwise, we go through the same gateway
-			 * and dst is already set up.
-			 */
-		} else {
-		re_route:
-			RTFREE(ro->ro_rt);
-			ro->ro_rt = (struct rtentry *)0;
-		}
-	}
-	nsp->nsp_lastdst = idp->idp_dna;
-#endif /* ancient_history */
-	if (noIdpRoute) ro = 0;
-	return (ns_output(m, ro, so->so_options & SO_BROADCAST));
-}
-/* ARGSUSED */
-idp_ctloutput(req, so, level, name, value)
-	int req, level;
-	struct socket *so;
-	int name;
-	struct mbuf **value;
-{
-	register struct mbuf *m;
-	struct nspcb *nsp = sotonspcb(so);
-	int mask, error = 0;
-	extern long ns_pexseq;
-
-	if (nsp == NULL)
-		return (EINVAL);
-
-	switch (req) {
-
-	case PRCO_GETOPT:
-		if (value==NULL)
-			return (EINVAL);
-		m = m_get(M_DONTWAIT, MT_DATA);
-		if (m==NULL)
-			return (ENOBUFS);
-		switch (name) {
-
-		case SO_ALL_PACKETS:
-			mask = NSP_ALL_PACKETS;
-			goto get_flags;
-
-		case SO_HEADERS_ON_INPUT:
-			mask = NSP_RAWIN;
-			goto get_flags;
-
-		case SO_HEADERS_ON_OUTPUT:
-			mask = NSP_RAWOUT;
-		get_flags:
-			m->m_len = sizeof(short);
-			*mtod(m, short *) = nsp->nsp_flags & mask;
-			break;
-
-		case SO_DEFAULT_HEADERS:
-			m->m_len = sizeof(struct idp);
-			{
-				register struct idp *idp = mtod(m, struct idp *);
-				idp->idp_len = 0;
-				idp->idp_sum = 0;
-				idp->idp_tc = 0;
-				idp->idp_pt = nsp->nsp_dpt;
-				idp->idp_dna = nsp->nsp_faddr;
-				idp->idp_sna = nsp->nsp_laddr;
-			}
-			break;
-
-		case SO_SEQNO:
-			m->m_len = sizeof(long);
-			*mtod(m, long *) = ns_pexseq++;
-			break;
-
-		default:
-			error = EINVAL;
-		}
-		*value = m;
-		break;
-
-	case PRCO_SETOPT:
-		switch (name) {
-			int *ok;
-
-		case SO_ALL_PACKETS:
-			mask = NSP_ALL_PACKETS;
-			goto set_head;
-
-		case SO_HEADERS_ON_INPUT:
-			mask = NSP_RAWIN;
-			goto set_head;
-
-		case SO_HEADERS_ON_OUTPUT:
-			mask = NSP_RAWOUT;
-		set_head:
-			if (value && *value) {
-				ok = mtod(*value, int *);
-				if (*ok)
-					nsp->nsp_flags |= mask;
-				else
-					nsp->nsp_flags &= ~mask;
-			} else error = EINVAL;
-			break;
-
-		case SO_DEFAULT_HEADERS:
-			{
-				register struct idp *idp
-				    = mtod(*value, struct idp *);
-				nsp->nsp_dpt = idp->idp_pt;
-			}
-			break;
-#ifdef NSIP
-
-		case SO_NSIP_ROUTE:
-			error = nsip_route(*value);
-			break;
-#endif /* NSIP */
-		default:
-			error = EINVAL;
-		}
-		if (value && *value)
-			m_freem(*value);
-		break;
-	}
-	return (error);
-}
-
-/*ARGSUSED*/
-idp_usrreq(so, req, m, nam, control)
-	struct socket *so;
-	int req;
-	struct mbuf *m, *nam, *control;
-{
-	struct nspcb *nsp = sotonspcb(so);
-	int error = 0;
-
-	if (req == PRU_CONTROL)
-                return (ns_control(so, (int)m, (caddr_t)nam,
-			(struct ifnet *)control));
-	if (control && control->m_len) {
-		error = EINVAL;
-		goto release;
-	}
-	if (nsp == NULL && req != PRU_ATTACH) {
-		error = EINVAL;
-		goto release;
-	}
-	switch (req) {
-
-	case PRU_ATTACH:
-		if (nsp != NULL) {
-			error = EINVAL;
-			break;
-		}
-		error = ns_pcballoc(so, &nspcb);
-		if (error)
-			break;
-		error = soreserve(so, (u_long) 2048, (u_long) 2048);
-		if (error)
-			break;
-		break;
-
-	case PRU_DETACH:
-		if (nsp == NULL) {
-			error = ENOTCONN;
-			break;
-		}
-		ns_pcbdetach(nsp);
-		break;
-
-	case PRU_BIND:
-		error = ns_pcbbind(nsp, nam);
-		break;
-
-	case PRU_LISTEN:
-		error = EOPNOTSUPP;
-		break;
-
-	case PRU_CONNECT:
-		if (!ns_nullhost(nsp->nsp_faddr)) {
-			error = EISCONN;
-			break;
-		}
-		error = ns_pcbconnect(nsp, nam);
-		if (error == 0)
-			soisconnected(so);
-		break;
-
-	case PRU_CONNECT2:
-		error = EOPNOTSUPP;
-		break;
-
-	case PRU_ACCEPT:
-		error = EOPNOTSUPP;
-		break;
-
-	case PRU_DISCONNECT:
-		if (ns_nullhost(nsp->nsp_faddr)) {
-			error = ENOTCONN;
-			break;
-		}
-		ns_pcbdisconnect(nsp);
-		soisdisconnected(so);
-		break;
-
-	case PRU_SHUTDOWN:
-		socantsendmore(so);
-		break;
-
-	case PRU_SEND:
-	{
-		struct ns_addr laddr;
-		int s;
-
-		if (nam) {
-			laddr = nsp->nsp_laddr;
-			if (!ns_nullhost(nsp->nsp_faddr)) {
-				error = EISCONN;
-				break;
-			}
-			/*
-			 * Must block input while temporarily connected.
-			 */
-			s = splnet();
-			error = ns_pcbconnect(nsp, nam);
-			if (error) {
-				splx(s);
-				break;
-			}
-		} else {
-			if (ns_nullhost(nsp->nsp_faddr)) {
-				error = ENOTCONN;
-				break;
-			}
-		}
-		error = idp_output(nsp, m);
-		m = NULL;
-		if (nam) {
-			ns_pcbdisconnect(nsp);
-			splx(s);
-			nsp->nsp_laddr.x_host = laddr.x_host;
-			nsp->nsp_laddr.x_port = laddr.x_port;
-		}
-	}
-		break;
-
-	case PRU_ABORT:
-		ns_pcbdetach(nsp);
-		sotryfree(so);
-		soisdisconnected(so);	/* XXX huh, called after sofree()? */
-		break;
-
-	case PRU_SOCKADDR:
-		ns_setsockaddr(nsp, nam);
-		break;
-
-	case PRU_PEERADDR:
-		ns_setpeeraddr(nsp, nam);
-		break;
-
-	case PRU_SENSE:
-		/*
-		 * stat: don't bother with a blocksize.
-		 */
-		return (0);
-
-	case PRU_SENDOOB:
-	case PRU_FASTTIMO:
-	case PRU_SLOWTIMO:
-	case PRU_PROTORCV:
-	case PRU_PROTOSEND:
-		error =  EOPNOTSUPP;
-		break;
-
-	case PRU_CONTROL:
-	case PRU_RCVD:
-	case PRU_RCVOOB:
-		return (EOPNOTSUPP);	/* do not free mbuf's */
-
-	default:
-		panic("idp_usrreq");
-	}
-release:
-	if (control != NULL)
-		m_freem(control);
-	if (m != NULL)
-		m_freem(m);
-	return (error);
-}
-/*ARGSUSED*/
-idp_raw_usrreq(so, req, m, nam, control)
-	struct socket *so;
-	int req;
-	struct mbuf *m, *nam, *control;
-{
-	int error = 0;
-	struct nspcb *nsp = sotonspcb(so);
-	extern struct nspcb nsrawpcb;
-
-	switch (req) {
-
-	case PRU_ATTACH:
-
-		if (!(so->so_state & SS_PRIV) || (nsp != NULL)) {
-			error = EINVAL;
-			break;
-		}
-		error = ns_pcballoc(so, &nsrawpcb);
-		if (error)
-			break;
-		error = soreserve(so, (u_long) 2048, (u_long) 2048);
-		if (error)
-			break;
-		nsp = sotonspcb(so);
-		nsp->nsp_faddr.x_host = ns_broadhost;
-		nsp->nsp_flags = NSP_RAWIN | NSP_RAWOUT;
-		break;
-	default:
-		error = idp_usrreq(so, req, m, nam, control);
-	}
-	return (error);
-}
-
diff --git a/sys/netns/idp_var.h b/sys/netns/idp_var.h
deleted file mode 100644
index ab20d6b..0000000
--- a/sys/netns/idp_var.h
+++ /dev/null
@@ -1,55 +0,0 @@
-/*
- * 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.
- *
- *	@(#)idp_var.h	8.1 (Berkeley) 6/10/93
- * $FreeBSD$
- */
-
-#ifndef _NETNS_IDP_VAR_H_
-#define _NETNS_IDP_VAR_H_
-
-/*
- * IDP Kernel Structures and Variables
- */
-struct	idpstat {
-	int	idps_badsum;		/* checksum bad */
-	int	idps_tooshort;		/* packet too short */
-	int	idps_toosmall;		/* not enough data */
-	int	idps_badhlen;		/* ip header length < data size */
-	int	idps_badlen;		/* ip length < ip header length */
-};
-
-#ifdef _KERNEL
-struct	idpstat	idpstat;
-#endif
-
-#endif
diff --git a/sys/netns/ns.c b/sys/netns/ns.c
deleted file mode 100644
index 7af5acf..0000000
--- a/sys/netns/ns.c
+++ /dev/null
@@ -1,370 +0,0 @@
-/*
- * 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
- * $FreeBSD$
- */
-
-#include <sys/param.h>
-#include <sys/systm.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
diff --git a/sys/netns/ns.h b/sys/netns/ns.h
deleted file mode 100644
index 14c2b41..0000000
--- a/sys/netns/ns.h
+++ /dev/null
@@ -1,154 +0,0 @@
-/*
- * 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.h	8.1 (Berkeley) 6/10/93
- * $FreeBSD$
- */
-
-#ifndef _NETNS_NS_H_
-#define _NETNS_NS_H_
-
-/*
- * Constants and Structures defined by the Xerox Network Software
- * per "Internet Transport Protocols", XSIS 028112, December 1981
- */
-
-/*
- * Protocols
- */
-#define NSPROTO_RI	1		/* Routing Information */
-#define NSPROTO_ECHO	2		/* Echo Protocol */
-#define NSPROTO_ERROR	3		/* Error Protocol */
-#define NSPROTO_PE	4		/* Packet Exchange */
-#define NSPROTO_SPP	5		/* Sequenced Packet */
-#define NSPROTO_RAW	255		/* Placemarker*/
-#define NSPROTO_MAX	256		/* Placemarker*/
-
-
-/*
- * Port/Socket numbers: network standard functions
- */
-
-#define NSPORT_RI	1		/* Routing Information */
-#define NSPORT_ECHO	2		/* Echo */
-#define NSPORT_RE	3		/* Router Error */
-
-/*
- * Ports < NSPORT_RESERVED are reserved for priveleged
- * processes (e.g. root).
- */
-#define NSPORT_RESERVED		3000
-
-/* flags passed to ns_output as last parameter */
-
-#define	NS_FORWARDING		0x1	/* most of idp header exists */
-#define	NS_ROUTETOIF		0x10	/* same as SO_DONTROUTE */
-#define	NS_ALLOWBROADCAST	SO_BROADCAST	/* can send broadcast packets */
-
-#define NS_MAXHOPS		15
-
-/* flags passed to get/set socket option */
-#define	SO_HEADERS_ON_INPUT	1
-#define	SO_HEADERS_ON_OUTPUT	2
-#define	SO_DEFAULT_HEADERS	3
-#define	SO_LAST_HEADER		4
-#define	SO_NSIP_ROUTE		5
-#define SO_SEQNO		6
-#define	SO_ALL_PACKETS		7
-#define SO_MTU			8
-
-
-/*
- * NS addressing
- */
-union ns_host {
-	u_char	c_host[6];
-	u_short	s_host[3];
-};
-
-union ns_net {
-	u_char	c_net[4];
-	u_short	s_net[2];
-};
-
-union ns_net_u {
-	union ns_net	net_e;
-	u_long		long_e;
-};
-
-struct ns_addr {
-	union ns_net	x_net;
-	union ns_host	x_host;
-	u_short	x_port;
-};
-
-/*
- * Socket address, Xerox style
- */
-struct sockaddr_ns {
-	u_char		sns_len;
-	u_char		sns_family;
-	struct ns_addr	sns_addr;
-	char		sns_zero[2];
-};
-#define sns_port sns_addr.x_port
-
-#define ns_neteqnn(a,b) (((a).s_net[0]==(b).s_net[0]) && \
-					((a).s_net[1]==(b).s_net[1]))
-#define ns_neteq(a,b) ns_neteqnn((a).x_net, (b).x_net)
-#define satons_addr(sa)	(((struct sockaddr_ns *)&(sa))->sns_addr)
-#define ns_hosteqnh(s,t) ((s).s_host[0] == (t).s_host[0] && \
-	(s).s_host[1] == (t).s_host[1] && (s).s_host[2] == (t).s_host[2])
-#define ns_hosteq(s,t) (ns_hosteqnh((s).x_host,(t).x_host))
-#define ns_nullhost(x) (((x).x_host.s_host[0]==0) && \
-	((x).x_host.s_host[1]==0) && ((x).x_host.s_host[2]==0))
-
-#ifdef _KERNEL
-extern struct domain nsdomain;
-extern union ns_host ns_thishost;
-extern union ns_host ns_zerohost;
-extern union ns_host ns_broadhost;
-extern union ns_net ns_zeronet;
-extern union ns_net ns_broadnet;
-u_short ns_cksum(void);
-#else
-
-#include <sys/cdefs.h>
-
-__BEGIN_DECLS
-extern struct ns_addr ns_addr(const char *);
-extern char *ns_ntoa(struct ns_addr);
-__END_DECLS
-
-#endif
-
-#endif
diff --git a/sys/netns/ns_cksum.c b/sys/netns/ns_cksum.c
deleted file mode 100644
index 1f9a58a..0000000
--- a/sys/netns/ns_cksum.c
+++ /dev/null
@@ -1,205 +0,0 @@
-/*
- * Copyright (c) 1982, 1992, 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_cksum.c	8.1 (Berkeley) 6/10/93
- * $FreeBSD$
- */
-
-#include <sys/param.h>
-#include <sys/mbuf.h>
-
-/*
- * Checksum routine for Network Systems Protocol Packets (Big-Endian).
- *
- * This routine is very heavily used in the network
- * code and should be modified for each CPU to be as fast as possible.
- */
-
-#define ADDCARRY(x)  { if ((x) > 65535) (x) -= 65535; }
-#define FOLD(x) {l_util.l = (x); (x) = l_util.s[0] + l_util.s[1]; ADDCARRY(x);}
-
-u_short
-ns_cksum(m, len)
-	register struct mbuf *m;
-	register int len;
-{
-	register u_short *w;
-	register int sum = 0;
-	register int mlen = 0;
-	register int sum2;
-
-	union {
-		u_short s[2];
-		long	l;
-	} l_util;
-
-	for (;m && len; m = m->m_next) {
-		if (m->m_len == 0)
-			continue;
-		/*
-		 * Each trip around loop adds in
-		 * word from one mbuf segment.
-		 */
-		w = mtod(m, u_short *);
-		if (mlen == -1) {
-			/*
-			 * There is a byte left from the last segment;
-			 * ones-complement add it into the checksum.
-			 */
-#if BYTE_ORDER == BIG_ENDIAN
-			sum  += *(u_char *)w;
-#else
-			sum  += *(u_char *)w << 8;
-#endif
-			sum += sum;
-			w = (u_short *)(1 + (char *)w);
-			mlen = m->m_len - 1;
-			len--;
-			FOLD(sum);
-		} else
-			mlen = m->m_len;
-		if (len < mlen)
-			mlen = len;
-		len -= mlen;
-		/*
-		 * We can do a 16 bit ones complement sum using
-		 * 32 bit arithmetic registers for adding,
-		 * with carries from the low added
-		 * into the high (by normal carry-chaining)
-		 * so long as we fold back before 16 carries have occured.
-		 */
-		if (1 & (int) w)
-			goto uuuuglyy;
-#ifndef TINY
-/* -DTINY reduces the size from 1250 to 550, but slows it down by 22% */
-		while ((mlen -= 32) >= 0) {
-			sum += w[0]; sum += sum; sum += w[1]; sum += sum;
-			sum += w[2]; sum += sum; sum += w[3]; sum += sum;
-			sum += w[4]; sum += sum; sum += w[5]; sum += sum;
-			sum += w[6]; sum += sum; sum += w[7]; sum += sum;
-			FOLD(sum);
-			sum += w[8]; sum += sum; sum += w[9]; sum += sum;
-			sum += w[10]; sum += sum; sum += w[11]; sum += sum;
-			sum += w[12]; sum += sum; sum += w[13]; sum += sum;
-			sum += w[14]; sum += sum; sum += w[15]; sum += sum;
-			FOLD(sum);
-			w += 16;
-		}
-		mlen += 32;
-#endif
-		while ((mlen -= 8) >= 0) {
-			sum += w[0]; sum += sum; sum += w[1]; sum += sum;
-			sum += w[2]; sum += sum; sum += w[3]; sum += sum;
-			FOLD(sum);
-			w += 4;
-		}
-		mlen += 8;
-		while ((mlen -= 2) >= 0) {
-			sum += *w++; sum += sum;
-		}
-		goto commoncase;
-uuuuglyy:
-#if BYTE_ORDER == BIG_ENDIAN
-#define ww(n) (((u_char *)w)[n + n + 1])
-#define vv(n) (((u_char *)w)[n + n])
-#else
-#if BYTE_ORDER == LITTLE_ENDIAN
-#define vv(n) (((u_char *)w)[n + n + 1])
-#define ww(n) (((u_char *)w)[n + n])
-#endif
-#endif
-		sum2 = 0;
-#ifndef TINY
-		while ((mlen -= 32) >= 0) {
-		    sum += ww(0); sum += sum; sum += ww(1); sum += sum;
-		    sum += ww(2); sum += sum; sum += ww(3); sum += sum;
-		    sum += ww(4); sum += sum; sum += ww(5); sum += sum;
-		    sum += ww(6); sum += sum; sum += ww(7); sum += sum;
-		    FOLD(sum);
-		    sum += ww(8); sum += sum; sum += ww(9); sum += sum;
-		    sum += ww(10); sum += sum; sum += ww(11); sum += sum;
-		    sum += ww(12); sum += sum; sum += ww(13); sum += sum;
-		    sum += ww(14); sum += sum; sum += ww(15); sum += sum;
-		    FOLD(sum);
-		    sum2 += vv(0); sum2 += sum2; sum2 += vv(1); sum2 += sum2;
-		    sum2 += vv(2); sum2 += sum2; sum2 += vv(3); sum2 += sum2;
-		    sum2 += vv(4); sum2 += sum2; sum2 += vv(5); sum2 += sum2;
-		    sum2 += vv(6); sum2 += sum2; sum2 += vv(7); sum2 += sum2;
-		    FOLD(sum2);
-		    sum2 += vv(8); sum2 += sum2; sum2 += vv(9); sum2 += sum2;
-		    sum2 += vv(10); sum2 += sum2; sum2 += vv(11); sum2 += sum2;
-		    sum2 += vv(12); sum2 += sum2; sum2 += vv(13); sum2 += sum2;
-		    sum2 += vv(14); sum2 += sum2; sum2 += vv(15); sum2 += sum2;
-		    FOLD(sum2);
-		    w += 16;
-		}
-		mlen += 32;
-#endif
-		while ((mlen -= 8) >= 0) {
-		    sum += ww(0); sum += sum; sum += ww(1); sum += sum;
-		    sum += ww(2); sum += sum; sum += ww(3); sum += sum;
-		    FOLD(sum);
-		    sum2 += vv(0); sum2 += sum2; sum2 += vv(1); sum2 += sum2;
-		    sum2 += vv(2); sum2 += sum2; sum2 += vv(3); sum2 += sum2;
-		    FOLD(sum2);
-		    w += 4;
-		}
-		mlen += 8;
-		while ((mlen -= 2) >= 0) {
-			sum += ww(0); sum += sum;
-			sum2 += vv(0); sum2 += sum2;
-			w++;
-		}
-		sum += (sum2 << 8);
-commoncase:
-		if (mlen == -1) {
-#if BYTE_ORDER == BIG_ENDIAN
-			sum += *(u_char *)w << 8;
-#else
-			sum += *(u_char *)w;
-#endif
-		}
-		FOLD(sum);
-	}
-	if (mlen == -1) {
-		/* We had an odd number of bytes to sum; assume a garbage
-		   byte of zero and clean up */
-		sum += sum;
-		FOLD(sum);
-	}
-	/*
-	 * sum has already been kept to low sixteen bits.
-	 * just examine result and exit.
-	 */
-	if(sum==0xffff) sum = 0;
-	return (sum);
-}
diff --git a/sys/netns/ns_error.c b/sys/netns/ns_error.c
deleted file mode 100644
index fc4db94..0000000
--- a/sys/netns/ns_error.c
+++ /dev/null
@@ -1,324 +0,0 @@
-/*
- * Copyright (c) 1984, 1988, 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_error.c	8.1 (Berkeley) 6/10/93
- * $FreeBSD$
- */
-
-#include <sys/param.h>
-#include <sys/systm.h>
-#include <sys/malloc.h>
-#include <sys/mbuf.h>
-#include <sys/protosw.h>
-#include <sys/socket.h>
-#include <sys/time.h>
-#include <sys/kernel.h>
-
-#include <net/route.h>
-
-#include <netns/ns.h>
-#include <netns/ns_pcb.h>
-#include <netns/idp.h>
-#include <netns/ns_error.h>
-
-#ifdef lint
-#define NS_ERRPRINTFS 1
-#endif
-
-#ifdef NS_ERRPRINTFS
-/*
- * NS_ERR routines: error generation, receive packet processing, and
- * routines to turnaround packets back to the originator.
- */
-int	ns_errprintfs = 0;
-#endif
-
-ns_err_x(c)
-{
-	register u_short *w, *lim, *base = ns_errstat.ns_es_codes;
-	u_short x = c;
-
-	/*
-	 * zero is a legit error code, handle specially
-	 */
-	if (x == 0)
-		return (0);
-	lim = base + NS_ERR_MAX - 1;
-	for (w = base + 1; w < lim; w++) {
-		if (*w == 0)
-			*w = x;
-		if (*w == x)
-			break;
-	}
-	return (w - base);
-}
-
-/*
- * Generate an error packet of type error
- * in response to bad packet.
- */
-
-ns_error(om, type, param)
-	struct mbuf *om;
-	int type;
-{
-	register struct ns_epidp *ep;
-	struct mbuf *m;
-	struct idp *nip;
-	register struct idp *oip = mtod(om, struct idp *);
-	extern int idpcksum;
-
-	/*
-	 * If this packet was sent to the echo port,
-	 * and nobody was there, just echo it.
-	 * (Yes, this is a wart!)
-	 */
-	if (type == NS_ERR_NOSOCK &&
-	    oip->idp_dna.x_port == htons(2) &&
-	    (type = ns_echo(om))==0)
-		return;
-
-#ifdef NS_ERRPRINTFS
-	if (ns_errprintfs)
-		printf("ns_err_error(%x, %d, %d)\n", oip, type, param);
-#endif
-	/*
-	 * Don't Generate error packets in response to multicasts.
-	 */
-	if (oip->idp_dna.x_host.c_host[0] & 1)
-		goto freeit;
-
-	ns_errstat.ns_es_error++;
-	/*
-	 * Make sure that the old IDP packet had 30 bytes of data to return;
-	 * if not, don't bother.  Also don't EVER error if the old
-	 * packet protocol was NS_ERR.
-	 */
-	if (oip->idp_len < sizeof(struct idp)) {
-		ns_errstat.ns_es_oldshort++;
-		goto freeit;
-	}
-	if (oip->idp_pt == NSPROTO_ERROR) {
-		ns_errstat.ns_es_oldns_err++;
-		goto freeit;
-	}
-
-	/*
-	 * First, formulate ns_err message
-	 */
-	m = m_gethdr(M_DONTWAIT, MT_HEADER);
-	if (m == NULL)
-		goto freeit;
-	m->m_len = sizeof(*ep);
-	MH_ALIGN(m, m->m_len);
-	ep = mtod(m, struct ns_epidp *);
-	if ((u_int)type > NS_ERR_TOO_BIG)
-		panic("ns_err_error");
-	ns_errstat.ns_es_outhist[ns_err_x(type)]++;
-	ep->ns_ep_errp.ns_err_num = htons((u_short)type);
-	ep->ns_ep_errp.ns_err_param = htons((u_short)param);
-	bcopy((caddr_t)oip, (caddr_t)&ep->ns_ep_errp.ns_err_idp, 42);
-	nip = &ep->ns_ep_idp;
-	nip->idp_len = sizeof(*ep);
-	nip->idp_len = htons((u_short)nip->idp_len);
-	nip->idp_pt = NSPROTO_ERROR;
-	nip->idp_tc = 0;
-	nip->idp_dna = oip->idp_sna;
-	nip->idp_sna = oip->idp_dna;
-	if (idpcksum) {
-		nip->idp_sum = 0;
-		nip->idp_sum = ns_cksum(m, sizeof(*ep));
-	} else
-		nip->idp_sum = 0xffff;
-	(void) ns_output(m, (struct route *)0, 0);
-
-freeit:
-	m_freem(om);
-}
-
-ns_printhost(p)
-register struct ns_addr *p;
-{
-
-	printf("<net:%x%x,host:%x%x%x,port:%x>",
-			p->x_net.s_net[0],
-			p->x_net.s_net[1],
-			p->x_host.s_host[0],
-			p->x_host.s_host[1],
-			p->x_host.s_host[2],
-			p->x_port);
-
-}
-
-/*
- * Process a received NS_ERR message.
- */
-ns_err_input(m)
-	struct mbuf *m;
-{
-	register struct ns_errp *ep;
-	register struct ns_epidp *epidp = mtod(m, struct ns_epidp *);
-	register int i;
-	int type, code, param;
-
-	/*
-	 * Locate ns_err structure in mbuf, and check
-	 * that not corrupted and of at least minimum length.
-	 */
-#ifdef NS_ERRPRINTFS
-	if (ns_errprintfs) {
-		printf("ns_err_input from ");
-		ns_printhost(&epidp->ns_ep_idp.idp_sna);
-		printf("len %d\n", ntohs(epidp->ns_ep_idp.idp_len));
-	}
-#endif
-	i = sizeof (struct ns_epidp);
- 	if (((m->m_flags & M_EXT) || m->m_len < i) &&
- 		(m = m_pullup(m, i)) == 0)  {
-		ns_errstat.ns_es_tooshort++;
-		return;
-	}
-	ep = &(mtod(m, struct ns_epidp *)->ns_ep_errp);
-	type = ntohs(ep->ns_err_num);
-	param = ntohs(ep->ns_err_param);
-	ns_errstat.ns_es_inhist[ns_err_x(type)]++;
-
-#ifdef NS_ERRPRINTFS
-	/*
-	 * Message type specific processing.
-	 */
-	if (ns_errprintfs)
-		printf("ns_err_input, type %d param %d\n", type, param);
-#endif
-	if (type >= NS_ERR_TOO_BIG) {
-		goto badcode;
-	}
-	ns_errstat.ns_es_outhist[ns_err_x(type)]++;
-	switch (type) {
-
-	case NS_ERR_UNREACH_HOST:
-		code = PRC_UNREACH_NET;
-		goto deliver;
-
-	case NS_ERR_TOO_OLD:
-		code = PRC_TIMXCEED_INTRANS;
-		goto deliver;
-
-	case NS_ERR_TOO_BIG:
-		code = PRC_MSGSIZE;
-		goto deliver;
-
-	case NS_ERR_FULLUP:
-		code = PRC_QUENCH;
-		goto deliver;
-
-	case NS_ERR_NOSOCK:
-		code = PRC_UNREACH_PORT;
-		goto deliver;
-
-	case NS_ERR_UNSPEC_T:
-	case NS_ERR_BADSUM_T:
-	case NS_ERR_BADSUM:
-	case NS_ERR_UNSPEC:
-		code = PRC_PARAMPROB;
-		goto deliver;
-
-	deliver:
-		/*
-		 * Problem with datagram; advise higher level routines.
-		 */
-#ifdef NS_ERRPRINTFS
-		if (ns_errprintfs)
-			printf("deliver to protocol %d\n",
-				       ep->ns_err_idp.idp_pt);
-#endif
-		switch(ep->ns_err_idp.idp_pt) {
-		case NSPROTO_SPP:
-			spp_ctlinput(code, (caddr_t)ep);
-			break;
-
-		default:
-			idp_ctlinput(code, (caddr_t)ep);
-		}
-
-		goto freeit;
-
-	default:
-	badcode:
-		ns_errstat.ns_es_badcode++;
-		goto freeit;
-
-	}
-freeit:
-	m_freem(m);
-}
-
-#ifdef notdef
-u_long
-nstime()
-{
-	int s = splclock();
-	u_long t;
-
-	t = (time.tv_sec % (24*60*60)) * 1000 + time.tv_usec / 1000;
-	splx(s);
-	return (htonl(t));
-}
-#endif
-
-ns_echo(m)
-struct mbuf *m;
-{
-	register struct idp *idp = mtod(m, struct idp *);
-	register struct echo {
-	    struct idp	ec_idp;
-	    u_short		ec_op; /* Operation, 1 = request, 2 = reply */
-	} *ec = (struct echo *)idp;
-	struct ns_addr temp;
-
-	if (idp->idp_pt!=NSPROTO_ECHO) return(NS_ERR_NOSOCK);
-	if (ec->ec_op!=htons(1)) return(NS_ERR_UNSPEC);
-
-	ec->ec_op = htons(2);
-
-	temp = idp->idp_dna;
-	idp->idp_dna = idp->idp_sna;
-	idp->idp_sna = temp;
-
-	if (idp->idp_sum != 0xffff) {
-		idp->idp_sum = 0;
-		idp->idp_sum = ns_cksum(m,
-		    (int)(((ntohs(idp->idp_len) - 1)|1)+1));
-	}
-	(void) ns_output(m, (struct route *)0, NS_FORWARDING);
-	return(0);
-}
diff --git a/sys/netns/ns_error.h b/sys/netns/ns_error.h
deleted file mode 100644
index 7375b0d..0000000
--- a/sys/netns/ns_error.h
+++ /dev/null
@@ -1,96 +0,0 @@
-/*
- * Copyright (c) 1984, 1988, 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_error.h	8.1 (Berkeley) 6/10/93
- * $FreeBSD$
- */
-
-#ifndef _NETNS_NS_ERROR_H_
-#define _NETNS_NS_ERROR_H_
-
-/*
- * Xerox NS error messages
- */
-
-struct ns_errp {
-	u_short		ns_err_num;		/* Error Number */
-	u_short		ns_err_param;		/* Error Parameter */
-	struct idp	ns_err_idp;		/* Initial segment of offending
-						   packet */
-	u_char		ns_err_lev2[12];	/* at least this much higher
-						   level protocol */
-};
-struct  ns_epidp {
-	struct idp ns_ep_idp;
-	struct ns_errp ns_ep_errp;
-};
-
-#define	NS_ERR_UNSPEC	0	/* Unspecified Error detected at dest. */
-#define	NS_ERR_BADSUM	1	/* Bad Checksum detected at dest */
-#define	NS_ERR_NOSOCK	2	/* Specified socket does not exist at dest*/
-#define	NS_ERR_FULLUP	3	/* Dest. refuses packet due to resource lim.*/
-#define	NS_ERR_UNSPEC_T	0x200	/* Unspec. Error occured before reaching dest*/
-#define	NS_ERR_BADSUM_T	0x201	/* Bad Checksum detected in transit */
-#define	NS_ERR_UNREACH_HOST	0x202	/* Dest cannot be reached from here*/
-#define	NS_ERR_TOO_OLD	0x203	/* Packet x'd 15 routers without delivery*/
-#define	NS_ERR_TOO_BIG	0x204	/* Packet too large to be forwarded through
-				   some intermediate gateway.  The error
-				   parameter field contains the max packet
-				   size that can be accommodated */
-#define NS_ERR_MAX 20
-
-/*
- * Variables related to this implementation
- * of the network systems error message protocol.
- */
-struct	ns_errstat {
-/* statistics related to ns_err packets generated */
-	int	ns_es_error;		/* # of calls to ns_error */
-	int	ns_es_oldshort;		/* no error 'cuz old ip too short */
-	int	ns_es_oldns_err;	/* no error 'cuz old was ns_err */
-	int	ns_es_outhist[NS_ERR_MAX];
-/* statistics related to input messages processed */
-	int	ns_es_badcode;		/* ns_err_code out of range */
-	int	ns_es_tooshort;		/* packet < IDP_MINLEN */
-	int	ns_es_checksum;		/* bad checksum */
-	int	ns_es_badlen;		/* calculated bound mismatch */
-	int	ns_es_reflect;		/* number of responses */
-	int	ns_es_inhist[NS_ERR_MAX];
-	u_short	ns_es_codes[NS_ERR_MAX];/* which error code for outhist
-					   since we might not know all */
-};
-
-#ifdef _KERNEL
-struct	ns_errstat ns_errstat;
-#endif
-
-#endif
diff --git a/sys/netns/ns_if.h b/sys/netns/ns_if.h
deleted file mode 100644
index c80eebb..0000000
--- a/sys/netns/ns_if.h
+++ /dev/null
@@ -1,88 +0,0 @@
-/*
- * 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_if.h	8.1 (Berkeley) 6/10/93
- * $FreeBSD$
- */
-
-#ifndef _NETNS_NS_IF_H_
-#define _NETNS_NS_IF_H_
-
-/*
- * Interface address, xerox version.  One of these structures
- * is allocated for each interface with an internet address.
- * The ifaddr structure contains the protocol-independent part
- * of the structure and is assumed to be first.
- */
-
-struct ns_ifaddr {
-	struct	ifaddr ia_ifa;		/* protocol-independent info */
-#define	ia_ifp		ia_ifa.ifa_ifp
-#define	ia_flags	ia_ifa.ifa_flags
-	struct	ns_ifaddr *ia_next;	/* next in list of xerox addresses */
-	struct	sockaddr_ns ia_addr;	/* reserve space for my address */
-	struct	sockaddr_ns ia_dstaddr;	/* space for my broadcast address */
-#define ia_broadaddr	ia_dstaddr
-	struct	sockaddr_ns ia_netmask;	/* space for my network mask */
-};
-
-struct	ns_aliasreq {
-	char	ifra_name[IFNAMSIZ];		/* if name, e.g. "en0" */
-	struct	sockaddr_ns ifra_addr;
-	struct	sockaddr_ns ifra_broadaddr;
-#define ifra_dstaddr ifra_broadaddr
-};
-/*
- * Given a pointer to an ns_ifaddr (ifaddr),
- * return a pointer to the addr as a sockadd_ns.
- */
-
-#define	IA_SNS(ia) (&(((struct ns_ifaddr *)(ia))->ia_addr))
-
-/* This is not the right place for this but where is? */
-#define	ETHERTYPE_NS	0x0600
-
-#ifdef	NSIP
-struct nsip_req {
-	struct sockaddr rq_ns;	/* must be ns format destination */
-	struct sockaddr rq_ip;	/* must be ip format gateway */
-	short rq_flags;
-};
-#endif
-
-#ifdef	_KERNEL
-extern struct ns_ifaddr	*ns_ifaddr;
-struct ns_ifaddr	*ns_iaonnetof(void);
-void			nsintr(struct mbuf *);
-#endif
-
-#endif
diff --git a/sys/netns/ns_input.c b/sys/netns/ns_input.c
deleted file mode 100644
index 9cf6f73..0000000
--- a/sys/netns/ns_input.c
+++ /dev/null
@@ -1,483 +0,0 @@
-/*
- * 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_input.c	8.1 (Berkeley) 6/10/93
- * $FreeBSD$
- */
-
-#include <sys/param.h>
-#include <sys/systm.h>
-#include <sys/malloc.h>
-#include <sys/mbuf.h>
-#include <sys/domain.h>
-#include <sys/protosw.h>
-#include <sys/socket.h>
-#include <sys/socketvar.h>
-#include <sys/errno.h>
-#include <sys/time.h>
-#include <sys/kernel.h>
-
-#include <net/if.h>
-#include <net/route.h>
-#include <net/raw_cb.h>
-#include <net/netisr.h>
-
-#include <netns/ns.h>
-#include <netns/ns_if.h>
-#include <netns/ns_pcb.h>
-#include <netns/idp.h>
-#include <netns/idp_var.h>
-#include <netns/ns_error.h>
-
-/*
- * NS initialization.
- */
-union ns_host	ns_thishost;
-union ns_host	ns_zerohost;
-union ns_host	ns_broadhost;
-union ns_net	ns_zeronet;
-union ns_net	ns_broadnet;
-struct sockaddr_ns ns_netmask, ns_hostmask;
-
-static u_short allones[] = {-1, -1, -1};
-
-static struct ifqueue nsintrq;
-struct nspcb nspcb;
-struct nspcb nsrawpcb;
-
-int	nsqmaxlen = IFQ_MAXLEN;
-
-int	idpcksum = 1;
-long	ns_pexseq;
-
-ns_init()
-{
-	extern struct timeval time;
-
-	ns_broadhost = * (union ns_host *) allones;
-	ns_broadnet = * (union ns_net *) allones;
-	nspcb.nsp_next = nspcb.nsp_prev = &nspcb;
-	nsrawpcb.nsp_next = nsrawpcb.nsp_prev = &nsrawpcb;
-	ns_pexseq = time.tv_usec;
-	ns_netmask.sns_len = 6;
-	ns_netmask.sns_addr.x_net = ns_broadnet;
-	ns_hostmask.sns_len = 12;
-	ns_hostmask.sns_addr.x_net = ns_broadnet;
-	ns_hostmask.sns_addr.x_host = ns_broadhost;
-	nsintrq.ifq_maxlen = nsqmaxlen;
-	mtx_init(&nsintrq.ifq_mtx, "ns_inq", NULL, MTX_DEF);
-	netisr_register(NETISR_NS, nsintr, &nsintrq);
-}
-
-/*
- * Idp input routine.  Pass to next level.
- */
-int nsintr_getpck = 0;
-int nsintr_swtch = 0;
-void
-nsintr(struct mbuf *m)
-{
-	register struct idp *idp;
-	register struct nspcb *nsp;
-	register int i;
-	int len, s, error;
-	char oddpacketp;
-
-	/*
-	 * Get next datagram off input queue and get IDP header
-	 * in first mbuf.
-	 */
-	nsintr_getpck++;
-	if ((m->m_flags & M_EXT || m->m_len < sizeof (struct idp)) &&
-	    (m = m_pullup(m, sizeof (struct idp))) == 0) {
-		idpstat.idps_toosmall++;
-		return;
-	}
-
-	/*
-	 * Give any raw listeners a crack at the packet
-	 */
-	for (nsp = nsrawpcb.nsp_next; nsp != &nsrawpcb; nsp = nsp->nsp_next) {
-		struct mbuf *m1 = m_copy(m, 0, (int)M_COPYALL);
-		if (m1) idp_input(m1, nsp);
-	}
-
-	idp = mtod(m, struct idp *);
-	len = ntohs(idp->idp_len);
-	if (oddpacketp = len & 1) {
-		len++;		/* If this packet is of odd length,
-				   preserve garbage byte for checksum */
-	}
-
-	/*
-	 * Check that the amount of data in the buffers
-	 * is as at least much as the IDP header would have us expect.
-	 * Trim mbufs if longer than we expect.
-	 * Drop packet if shorter than we expect.
-	 */
-	if (m->m_pkthdr.len < len) {
-		idpstat.idps_tooshort++;
-		goto bad;
-	}
-	if (m->m_pkthdr.len > len) {
-		if (m->m_len == m->m_pkthdr.len) {
-			m->m_len = len;
-			m->m_pkthdr.len = len;
-		} else
-			m_adj(m, len - m->m_pkthdr.len);
-	}
-	if (idpcksum && ((i = idp->idp_sum)!=0xffff)) {
-		idp->idp_sum = 0;
-		if (i != (idp->idp_sum = ns_cksum(m, len))) {
-			idpstat.idps_badsum++;
-			idp->idp_sum = i;
-			if (ns_hosteqnh(ns_thishost, idp->idp_dna.x_host))
-				error = NS_ERR_BADSUM;
-			else
-				error = NS_ERR_BADSUM_T;
-			ns_error(m, error, 0);
-			return;
-		}
-	}
-	/*
-	 * Is this a directed broadcast?
-	 */
-	if (ns_hosteqnh(ns_broadhost,idp->idp_dna.x_host)) {
-		if ((!ns_neteq(idp->idp_dna, idp->idp_sna)) &&
-		    (!ns_neteqnn(idp->idp_dna.x_net, ns_broadnet)) &&
-		    (!ns_neteqnn(idp->idp_sna.x_net, ns_zeronet)) &&
-		    (!ns_neteqnn(idp->idp_dna.x_net, ns_zeronet)) ) {
-			/*
-			 * Look to see if I need to eat this packet.
-			 * Algorithm is to forward all young packets
-			 * and prematurely age any packets which will
-			 * by physically broadcasted.
-			 * Any very old packets eaten without forwarding
-			 * would die anyway.
-			 *
-			 * Suggestion of Bill Nesheim, Cornell U.
-			 */
-			if (idp->idp_tc < NS_MAXHOPS) {
-				idp_forward(m);
-				return;
-			}
-		}
-	/*
-	 * Is this our packet? If not, forward.
-	 */
-	} else if (!ns_hosteqnh(ns_thishost,idp->idp_dna.x_host)) {
-		idp_forward(m);
-		return;
-	}
-	/*
-	 * Locate pcb for datagram.
-	 */
-	nsp = ns_pcblookup(&idp->idp_sna, idp->idp_dna.x_port, NS_WILDCARD);
-	/*
-	 * Switch out to protocol's input routine.
-	 */
-	nsintr_swtch++;
-	if (nsp) {
-		if (oddpacketp) {
-			m_adj(m, -1);
-		}
-		if ((nsp->nsp_flags & NSP_ALL_PACKETS)==0)
-			switch (idp->idp_pt) {
-
-			    case NSPROTO_SPP:
-				    spp_input(m, nsp);
-				    return;
-
-			    case NSPROTO_ERROR:
-				    ns_err_input(m);
-				    return;
-			}
-		idp_input(m, nsp);
-	} else {
-		ns_error(m, NS_ERR_NOSOCK, 0);
-	}
-	return;
-
-bad:
-	m_freem(m);
-	return;
-}
-
-u_char nsctlerrmap[PRC_NCMDS] = {
-	ECONNABORTED,	ECONNABORTED,	0,		0,
-	0,		0,		EHOSTDOWN,	EHOSTUNREACH,
-	ENETUNREACH,	EHOSTUNREACH,	ECONNREFUSED,	ECONNREFUSED,
-	EMSGSIZE,	0,		0,		0,
-	0,		0,		0,		0
-};
-
-int idp_donosocks = 1;
-
-idp_ctlinput(cmd, arg)
-	int cmd;
-	caddr_t arg;
-{
-	struct ns_addr *ns;
-	struct nspcb *nsp;
-	struct ns_errp *errp;
-	int idp_abort();
-	extern struct nspcb *idp_drop();
-	int type;
-
-	if (cmd < 0 || cmd > PRC_NCMDS)
-		return;
-	if (nsctlerrmap[cmd] == 0)
-		return;		/* XXX */
-	type = NS_ERR_UNREACH_HOST;
-	switch (cmd) {
-		struct sockaddr_ns *sns;
-
-	case PRC_IFDOWN:
-	case PRC_HOSTDEAD:
-	case PRC_HOSTUNREACH:
-		sns = (struct sockaddr_ns *)arg;
-		if (sns->sns_family != AF_NS)
-			return;
-		ns = &sns->sns_addr;
-		break;
-
-	default:
-		errp = (struct ns_errp *)arg;
-		ns = &errp->ns_err_idp.idp_dna;
-		type = errp->ns_err_num;
-		type = ntohs((u_short)type);
-	}
-	switch (type) {
-
-	case NS_ERR_UNREACH_HOST:
-		ns_pcbnotify(ns, (int)nsctlerrmap[cmd], idp_abort, (long)0);
-		break;
-
-	case NS_ERR_NOSOCK:
-		nsp = ns_pcblookup(ns, errp->ns_err_idp.idp_sna.x_port,
-			NS_WILDCARD);
-		if(nsp && idp_donosocks && ! ns_nullhost(nsp->nsp_faddr))
-			(void) idp_drop(nsp, (int)nsctlerrmap[cmd]);
-	}
-}
-
-int	idpprintfs = 0;
-int	idpforwarding = 1;
-/*
- * Forward a packet.  If some error occurs return the sender
- * an error packet.  Note we can't always generate a meaningful
- * error message because the NS errors don't have a large enough repetoire
- * of codes and types.
- */
-struct route idp_droute;
-struct route idp_sroute;
-
-idp_forward(m)
-struct mbuf *m;
-{
-	register struct idp *idp = mtod(m, struct idp *);
-	register int error, type, code;
-	struct mbuf *mcopy = NULL;
-	int agedelta = 1;
-	int flags = NS_FORWARDING;
-	int ok_there = 0;
-	int ok_back = 0;
-
-	if (idpprintfs) {
-		printf("forward: src ");
-		ns_printhost(&idp->idp_sna);
-		printf(", dst ");
-		ns_printhost(&idp->idp_dna);
-		printf("hop count %d\n", idp->idp_tc);
-	}
-	if (idpforwarding == 0) {
-		/* can't tell difference between net and host */
-		type = NS_ERR_UNREACH_HOST, code = 0;
-		goto senderror;
-	}
-	idp->idp_tc++;
-	if (idp->idp_tc > NS_MAXHOPS) {
-		type = NS_ERR_TOO_OLD, code = 0;
-		goto senderror;
-	}
-	/*
-	 * Save at most 42 bytes of the packet in case
-	 * we need to generate an NS error message to the src.
-	 */
-	mcopy = m_copy(m, 0, imin((int)ntohs(idp->idp_len), 42));
-
-	if ((ok_there = idp_do_route(&idp->idp_dna,&idp_droute))==0) {
-		type = NS_ERR_UNREACH_HOST, code = 0;
-		goto senderror;
-	}
-	/*
-	 * Here we think about  forwarding  broadcast packets,
-	 * so we try to insure that it doesn't go back out
-	 * on the interface it came in on.  Also, if we
-	 * are going to physically broadcast this, let us
-	 * age the packet so we can eat it safely the second time around.
-	 */
-	if (idp->idp_dna.x_host.c_host[0] & 0x1) {
-		struct ns_ifaddr *ia = ns_iaonnetof(&idp->idp_dna);
-		struct ifnet *ifp;
-		if (ia) {
-			/* I'm gonna hafta eat this packet */
-			agedelta += NS_MAXHOPS - idp->idp_tc;
-			idp->idp_tc = NS_MAXHOPS;
-		}
-		if ((ok_back = idp_do_route(&idp->idp_sna,&idp_sroute))==0) {
-			/* error = ENETUNREACH; He'll never get it! */
-			m_freem(m);
-			goto cleanup;
-		}
-		if (idp_droute.ro_rt &&
-		    (ifp=idp_droute.ro_rt->rt_ifp) &&
-		    idp_sroute.ro_rt &&
-		    (ifp!=idp_sroute.ro_rt->rt_ifp)) {
-			flags |= NS_ALLOWBROADCAST;
-		} else {
-			type = NS_ERR_UNREACH_HOST, code = 0;
-			goto senderror;
-		}
-	}
-	/* need to adjust checksum */
-	if (idp->idp_sum!=0xffff) {
-		union bytes {
-			u_char c[4];
-			u_short s[2];
-			long l;
-		} x;
-		register int shift;
-		x.l = 0; x.c[0] = agedelta;
-		shift = (((((int)ntohs(idp->idp_len))+1)>>1)-2) & 0xf;
-		x.l = idp->idp_sum + (x.s[0] << shift);
-		x.l = x.s[0] + x.s[1];
-		x.l = x.s[0] + x.s[1];
-		if (x.l==0xffff) idp->idp_sum = 0; else idp->idp_sum = x.l;
-	}
-	if ((error = ns_output(m, &idp_droute, flags)) &&
-	    (mcopy!=NULL)) {
-		idp = mtod(mcopy, struct idp *);
-		type = NS_ERR_UNSPEC_T, code = 0;
-		switch (error) {
-
-		case ENETUNREACH:
-		case EHOSTDOWN:
-		case EHOSTUNREACH:
-		case ENETDOWN:
-		case EPERM:
-			type = NS_ERR_UNREACH_HOST;
-			break;
-
-		case EMSGSIZE:
-			type = NS_ERR_TOO_BIG;
-			code = 576; /* too hard to figure out mtu here */
-			break;
-
-		case ENOBUFS:
-			type = NS_ERR_UNSPEC_T;
-			break;
-		}
-		mcopy = NULL;
-	senderror:
-		ns_error(m, type, code);
-	}
-cleanup:
-	if (ok_there)
-		idp_undo_route(&idp_droute);
-	if (ok_back)
-		idp_undo_route(&idp_sroute);
-	if (mcopy != NULL)
-		m_freem(mcopy);
-}
-
-idp_do_route(src, ro)
-struct ns_addr *src;
-struct route *ro;
-{
-
-	struct sockaddr_ns *dst;
-
-	bzero((caddr_t)ro, sizeof (*ro));
-	dst = (struct sockaddr_ns *)&ro->ro_dst;
-
-	dst->sns_len = sizeof(*dst);
-	dst->sns_family = AF_NS;
-	dst->sns_addr = *src;
-	dst->sns_addr.x_port = 0;
-	rtalloc(ro);
-	if (ro->ro_rt == 0 || ro->ro_rt->rt_ifp == 0) {
-		return (0);
-	}
-	ro->ro_rt->rt_use++;
-	return (1);
-}
-
-idp_undo_route(ro)
-register struct route *ro;
-{
-	if (ro->ro_rt) {RTFREE(ro->ro_rt);}
-}
-
-ns_watch_output(m, ifp)
-struct mbuf *m;
-struct ifnet *ifp;
-{
-	register struct nspcb *nsp;
-	register struct ifaddr *ifa;
-	/*
-	 * Give any raw listeners a crack at the packet
-	 */
-	for (nsp = nsrawpcb.nsp_next; nsp != &nsrawpcb; nsp = nsp->nsp_next) {
-		struct mbuf *m0 = m_copy(m, 0, (int)M_COPYALL);
-		if (m0) {
-			register struct idp *idp;
-
-			M_PREPEND(m0, sizeof (*idp), M_DONTWAIT);
-			if (m0 == NULL)
-				continue;
-			idp = mtod(m0, struct idp *);
-			idp->idp_sna.x_net = ns_zeronet;
-			idp->idp_sna.x_host = ns_thishost;
-			if (ifp && (ifp->if_flags & IFF_POINTOPOINT))
-			    for(ifa = ifp->if_addrlist; ifa;
-						ifa = ifa->ifa_next) {
-				if (ifa->ifa_addr->sa_family==AF_NS) {
-				    idp->idp_sna = IA_SNS(ifa)->sns_addr;
-				    break;
-				}
-			    }
-			idp->idp_len = ntohl(m0->m_pkthdr.len);
-			idp_input(m0, nsp);
-		}
-	}
-}
diff --git a/sys/netns/ns_ip.c b/sys/netns/ns_ip.c
deleted file mode 100644
index ef898ce..0000000
--- a/sys/netns/ns_ip.c
+++ /dev/null
@@ -1,429 +0,0 @@
-/*
- * 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_ip.c	8.1 (Berkeley) 6/10/93
- * $FreeBSD$
- */
-
-/*
- * Software interface driver for encapsulating ns in ip.
- */
-
-#ifdef NSIP
-#include <sys/param.h>
-#include <sys/systm.h>
-#include <sys/malloc.h>
-#include <sys/mbuf.h>
-#include <sys/socket.h>
-#include <sys/socketvar.h>
-#include <sys/errno.h>
-#include <sys/ioctl.h>
-#include <sys/protosw.h>
-
-#include <net/if.h>
-#include <net/netisr.h>
-#include <net/route.h>
-
-#include <netinet/in.h>
-#include <netinet/in_systm.h>
-#include <netinet/in_var.h>
-#include <netinet/ip.h>
-#include <netinet/ip_var.h>
-
-#include <machine/mtpr.h>
-
-#include <netns/ns.h>
-#include <netns/ns_if.h>
-#include <netns/idp.h>
-
-struct ifnet_en {
-	struct ifnet ifen_ifnet;
-	struct route ifen_route;
-	struct in_addr ifen_src;
-	struct in_addr ifen_dst;
-	struct ifnet_en *ifen_next;
-};
-
-int	nsipoutput(), nsipioctl(), nsipstart();
-#define LOMTU	(1024+512);
-
-struct ifnet nsipif;
-struct ifnet_en *nsip_list;		/* list of all hosts and gateways or
-					broadcast addrs */
-
-struct ifnet_en *
-nsipattach()
-{
-	register struct ifnet_en *m;
-	register struct ifnet *ifp;
-
-	if (nsipif.if_mtu == 0) {
-		ifp = &nsipif;
-		ifp->if_name = "nsip";
-		ifp->if_mtu = LOMTU;
-		ifp->if_ioctl = nsipioctl;
-		ifp->if_output = nsipoutput;
-		ifp->if_start = nsipstart;
-		ifp->if_flags = IFF_POINTOPOINT;
-	}
-
-	MALLOC((m), struct ifnet_en *, sizeof(*m), M_PCB, M_NOWAIT);
-	if (m == NULL) return (NULL);
-	m->ifen_next = nsip_list;
-	nsip_list = m;
-	ifp = &m->ifen_ifnet;
-
-	ifp->if_name = "nsip";
-	ifp->if_mtu = LOMTU;
-	ifp->if_ioctl = nsipioctl;
-	ifp->if_output = nsipoutput;
-	ifp->if_start = nsipstart;
-	ifp->if_flags = IFF_POINTOPOINT;
-	ifp->if_unit = nsipif.if_unit++;
-	if_attach(ifp);
-
-	return (m);
-}
-
-
-/*
- * Process an ioctl request.
- */
-/* ARGSUSED */
-nsipioctl(ifp, cmd, data)
-	register struct ifnet *ifp;
-	int cmd;
-	caddr_t data;
-{
-	int error = 0;
-	struct ifreq *ifr;
-
-	switch (cmd) {
-
-	case SIOCSIFADDR:
-		ifp->if_flags |= IFF_UP;
-		/* FALLTHROUGH */
-
-	case SIOCSIFDSTADDR:
-		/*
-		 * Everything else is done at a higher level.
-		 */
-		break;
-
-	case SIOCSIFFLAGS:
-		ifr = (struct ifreq *)data;
-		if ((ifr->ifr_flags & IFF_UP) == 0)
-			error = nsip_free(ifp);
-
-
-	default:
-		error = EINVAL;
-	}
-	return (error);
-}
-
-struct mbuf *nsip_badlen;
-struct mbuf *nsip_lastin;
-int nsip_hold_input;
-
-idpip_input(m, ifp)
-	register struct mbuf *m;
-	struct ifnet *ifp;
-{
-	register struct ip *ip;
-	register struct idp *idp;
-	int len, s;
-
-	if (nsip_hold_input) {
-		if (nsip_lastin) {
-			m_freem(nsip_lastin);
-		}
-		nsip_lastin = m_copym(m, 0, (int)M_COPYALL, M_DONTWAIT);
-	}
-	/*
-	 * Get IP and IDP header together in first mbuf.
-	 */
-	nsipif.if_ipackets++;
-	s = sizeof (struct ip) + sizeof (struct idp);
-	if (((m->m_flags & M_EXT) || m->m_len < s) &&
-	    (m = m_pullup(m, s)) == 0) {
-		nsipif.if_ierrors++;
-		return;
-	}
-	ip = mtod(m, struct ip *);
-	if (ip->ip_hl > (sizeof (struct ip) >> 2)) {
-		ip_stripoptions(m, (struct mbuf *)0);
-		if (m->m_len < s) {
-			if ((m = m_pullup(m, s)) == 0) {
-				nsipif.if_ierrors++;
-				return;
-			}
-			ip = mtod(m, struct ip *);
-		}
-	}
-
-	/*
-	 * Make mbuf data length reflect IDP length.
-	 * If not enough data to reflect IDP length, drop.
-	 */
-	m->m_data += sizeof (struct ip);
-	m->m_len -= sizeof (struct ip);
-	m->m_pkthdr.len -= sizeof (struct ip);
-	idp = mtod(m, struct idp *);
-	len = ntohs(idp->idp_len);
-	if (len & 1) len++;		/* Preserve Garbage Byte */
-	if (ip->ip_len != len) {
-		if (len > ip->ip_len) {
-			nsipif.if_ierrors++;
-			if (nsip_badlen) m_freem(nsip_badlen);
-			nsip_badlen = m;
-			return;
-		}
-		/* Any extra will be trimmed off by the NS routines */
-	}
-
-	/*
-	 * Place interface pointer before the data
-	 * for the receiving protocol.
-	 */
-	m->m_pkthdr.rcvif = ifp;
-	/*
-	 * Deliver to NS
-	 */
-	netisr_dispatch(NETISR_NS, m);
-}
-
-/* ARGSUSED */
-nsipoutput(ifn, m, dst)
-	struct ifnet_en *ifn;
-	register struct mbuf *m;
-	struct sockaddr *dst;
-{
-
-	register struct ip *ip;
-	register struct route *ro = &(ifn->ifen_route);
-	register int len = 0;
-	register struct idp *idp = mtod(m, struct idp *);
-	int error;
-
-	ifn->ifen_ifnet.if_opackets++;
-	nsipif.if_opackets++;
-
-
-	/*
-	 * Calculate data length and make space
-	 * for IP header.
-	 */
-	len =  ntohs(idp->idp_len);
-	if (len & 1) len++;		/* Preserve Garbage Byte */
-	/* following clause not necessary on vax */
-	if (3 & (int)m->m_data) {
-		/* force longword alignment of ip hdr */
-		struct mbuf *m0 = m_gethdr(MT_HEADER, M_DONTWAIT);
-		if (m0 == 0) {
-			m_freem(m);
-			return (ENOBUFS);
-		}
-		MH_ALIGN(m0, sizeof (struct ip));
-		m0->m_flags = m->m_flags & M_COPYFLAGS;
-		m0->m_next = m;
-		m0->m_len = sizeof (struct ip);
-		m0->m_pkthdr.len = m0->m_len + m->m_len;
-		m->m_flags &= ~M_PKTHDR;
-	} else {
-		M_PREPEND(m, sizeof (struct ip), M_DONTWAIT);
-		if (m == 0)
-			return (ENOBUFS);
-	}
-	/*
-	 * Fill in IP header.
-	 */
-	ip = mtod(m, struct ip *);
-	*(long *)ip = 0;
-	ip->ip_p = IPPROTO_IDP;
-	ip->ip_src = ifn->ifen_src;
-	ip->ip_dst = ifn->ifen_dst;
-	ip->ip_len = (u_short)len + sizeof (struct ip);
-	ip->ip_ttl = MAXTTL;
-
-	/*
-	 * Output final datagram.
-	 */
-	error =  (ip_output(m, (struct mbuf *)0, ro, SO_BROADCAST, NULL));
-	if (error) {
-		ifn->ifen_ifnet.if_oerrors++;
-		ifn->ifen_ifnet.if_ierrors = error;
-	}
-	return (error);
-bad:
-	m_freem(m);
-	return (ENETUNREACH);
-}
-
-nsipstart(ifp)
-struct ifnet *ifp;
-{
-	panic("nsip_start called");
-}
-
-struct ifreq ifr = {"nsip0"};
-
-nsip_route(m)
-	register struct mbuf *m;
-{
-	register struct nsip_req *rq = mtod(m, struct nsip_req *);
-	struct sockaddr_ns *ns_dst = (struct sockaddr_ns *)&rq->rq_ns;
-	struct sockaddr_in *ip_dst = (struct sockaddr_in *)&rq->rq_ip;
-	struct route ro;
-	struct ifnet_en *ifn;
-	struct sockaddr_in *src;
-
-	/*
-	 * First, make sure we already have an ns address:
-	 */
-	if (ns_hosteqnh(ns_thishost, ns_zerohost))
-		return (EADDRNOTAVAIL);
-	/*
-	 * Now, determine if we can get to the destination
-	 */
-	bzero((caddr_t)&ro, sizeof (ro));
-	ro.ro_dst = *(struct sockaddr *)ip_dst;
-	rtalloc(&ro);
-	if (ro.ro_rt == 0 || ro.ro_rt->rt_ifp == 0) {
-		return (ENETUNREACH);
-	}
-
-	/*
-	 * And see how he's going to get back to us:
-	 * i.e., what return ip address do we use?
-	 */
-	{
-		register struct in_ifaddr *ia;
-		struct ifnet *ifp = ro.ro_rt->rt_ifp;
-
-		for (ia = in_ifaddr; ia; ia = ia->ia_next)
-			if (ia->ia_ifp == ifp)
-				break;
-		if (ia == 0)
-			ia = in_ifaddr;
-		if (ia == 0) {
-			RTFREE(ro.ro_rt);
-			return (EADDRNOTAVAIL);
-		}
-		src = (struct sockaddr_in *)&ia->ia_addr;
-	}
-
-	/*
-	 * Is there a free (pseudo-)interface or space?
-	 */
-	for (ifn = nsip_list; ifn; ifn = ifn->ifen_next) {
-		if ((ifn->ifen_ifnet.if_flags & IFF_UP) == 0)
-			break;
-	}
-	if (ifn == NULL)
-		ifn = nsipattach();
-	if (ifn == NULL) {
-		RTFREE(ro.ro_rt);
-		return (ENOBUFS);
-	}
-	ifn->ifen_route = ro;
-	ifn->ifen_dst =  ip_dst->sin_addr;
-	ifn->ifen_src = src->sin_addr;
-
-	/*
-	 * now configure this as a point to point link
-	 */
-	ifr.ifr_name[4] = '0' + nsipif.if_unit - 1;
-	ifr.ifr_dstaddr = * (struct sockaddr *) ns_dst;
-	(void)ns_control((struct socket *)0, (int)SIOCSIFDSTADDR, (caddr_t)&ifr,
-			(struct ifnet *)ifn);
-	satons_addr(ifr.ifr_addr).x_host = ns_thishost;
-	return (ns_control((struct socket *)0, (int)SIOCSIFADDR, (caddr_t)&ifr,
-			(struct ifnet *)ifn));
-}
-
-nsip_free(ifp)
-struct ifnet *ifp;
-{
-	register struct ifnet_en *ifn = (struct ifnet_en *)ifp;
-	struct route *ro = & ifn->ifen_route;
-
-	if (ro->ro_rt) {
-		RTFREE(ro->ro_rt);
-		ro->ro_rt = 0;
-	}
-	ifp->if_flags &= ~IFF_UP;
-	return (0);
-}
-
-nsip_ctlinput(cmd, sa)
-	int cmd;
-	struct sockaddr *sa;
-{
-	extern u_char inetctlerrmap[];
-	struct sockaddr_in *sin;
-	int in_rtchange();
-
-	if ((unsigned)cmd >= PRC_NCMDS)
-		return;
-	if (sa->sa_family != AF_INET && sa->sa_family != AF_IMPLINK)
-		return;
-	sin = (struct sockaddr_in *)sa;
-	if (sin->sin_addr.s_addr == INADDR_ANY)
-		return;
-
-	switch (cmd) {
-
-	case PRC_ROUTEDEAD:
-	case PRC_REDIRECT_NET:
-	case PRC_REDIRECT_HOST:
-	case PRC_REDIRECT_TOSNET:
-	case PRC_REDIRECT_TOSHOST:
-		nsip_rtchange(&sin->sin_addr);
-		break;
-	}
-}
-
-nsip_rtchange(dst)
-	register struct in_addr *dst;
-{
-	register struct ifnet_en *ifn;
-
-	for (ifn = nsip_list; ifn; ifn = ifn->ifen_next) {
-		if (ifn->ifen_dst.s_addr == dst->s_addr &&
-			ifn->ifen_route.ro_rt) {
-				RTFREE(ifn->ifen_route.ro_rt);
-				ifn->ifen_route.ro_rt = 0;
-		}
-	}
-}
-#endif
diff --git a/sys/netns/ns_output.c b/sys/netns/ns_output.c
deleted file mode 100644
index d647de0..0000000
--- a/sys/netns/ns_output.c
+++ /dev/null
@@ -1,158 +0,0 @@
-/*
- * 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_output.c	8.1 (Berkeley) 6/10/93
- * $FreeBSD$
- */
-
-#include <sys/param.h>
-#include <sys/malloc.h>
-#include <sys/mbuf.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>
-#include <netns/idp.h>
-#include <netns/idp_var.h>
-
-int ns_hold_output = 0;
-int ns_copy_output = 0;
-int ns_output_cnt = 0;
-struct mbuf *ns_lastout;
-
-ns_output(m0, ro, flags)
-	struct mbuf *m0;
-	struct route *ro;
-	int flags;
-{
-	register struct idp *idp = mtod(m0, struct idp *);
-	register struct ifnet *ifp = 0;
-	int error = 0;
-	struct route idproute;
-	struct sockaddr_ns *dst;
-	extern int idpcksum;
-
-	if (ns_hold_output) {
-		if (ns_lastout) {
-			(void)m_free(ns_lastout);
-		}
-		ns_lastout = m_copy(m0, 0, (int)M_COPYALL);
-	}
-	/*
-	 * Route packet.
-	 */
-	if (ro == 0) {
-		ro = &idproute;
-		bzero((caddr_t)ro, sizeof (*ro));
-	}
-	dst = (struct sockaddr_ns *)&ro->ro_dst;
-	if (ro->ro_rt == 0) {
-		dst->sns_family = AF_NS;
-		dst->sns_len = sizeof (*dst);
-		dst->sns_addr = idp->idp_dna;
-		dst->sns_addr.x_port = 0;
-		/*
-		 * If routing to interface only,
-		 * short circuit routing lookup.
-		 */
-		if (flags & NS_ROUTETOIF) {
-			struct ns_ifaddr *ia = ns_iaonnetof(&idp->idp_dna);
-
-			if (ia == 0) {
-				error = ENETUNREACH;
-				goto bad;
-			}
-			ifp = ia->ia_ifp;
-			goto gotif;
-		}
-		rtalloc(ro);
-	} else if ((ro->ro_rt->rt_flags & RTF_UP) == 0) {
-		/*
-		 * The old route has gone away; try for a new one.
-		 */
-		rtfree(ro->ro_rt);
-		ro->ro_rt = NULL;
-		rtalloc(ro);
-	}
-	if (ro->ro_rt == 0 || (ifp = ro->ro_rt->rt_ifp) == 0) {
-		error = ENETUNREACH;
-		goto bad;
-	}
-	ro->ro_rt->rt_use++;
-	if (ro->ro_rt->rt_flags & (RTF_GATEWAY|RTF_HOST))
-		dst = (struct sockaddr_ns *)ro->ro_rt->rt_gateway;
-gotif:
-
-	/*
-	 * Look for multicast addresses and
-	 * and verify user is allowed to send
-	 * such a packet.
-	 */
-	if (dst->sns_addr.x_host.c_host[0]&1) {
-		if ((ifp->if_flags & IFF_BROADCAST) == 0) {
-			error = EADDRNOTAVAIL;
-			goto bad;
-		}
-		if ((flags & NS_ALLOWBROADCAST) == 0) {
-			error = EACCES;
-			goto bad;
-		}
-	}
-
-	if (htons(idp->idp_len) <= ifp->if_mtu) {
-		ns_output_cnt++;
-		if (ns_copy_output) {
-			ns_watch_output(m0, ifp);
-		}
-		error = (*ifp->if_output)(ifp, m0,
-					(struct sockaddr *)dst, ro->ro_rt);
-		goto done;
-	} else error = EMSGSIZE;
-
-
-bad:
-	if (ns_copy_output) {
-		ns_watch_output(m0, ifp);
-	}
-	m_freem(m0);
-done:
-	if (ro == &idproute && (flags & NS_ROUTETOIF) == 0 && ro->ro_rt) {
-		RTFREE(ro->ro_rt);
-		ro->ro_rt = 0;
-	}
-	return (error);
-}
diff --git a/sys/netns/ns_pcb.c b/sys/netns/ns_pcb.c
deleted file mode 100644
index 01301c0..0000000
--- a/sys/netns/ns_pcb.c
+++ /dev/null
@@ -1,364 +0,0 @@
-/*
- * 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_pcb.c	8.1 (Berkeley) 6/10/93
- * $FreeBSD$
- */
-
-#include <sys/param.h>
-#include <sys/systm.h>
-#include <sys/mbuf.h>
-#include <sys/errno.h>
-#include <sys/socket.h>
-#include <sys/socketvar.h>
-#include <sys/protosw.h>
-
-#include <net/if.h>
-#include <net/route.h>
-
-#include <netns/ns.h>
-#include <netns/ns_if.h>
-#include <netns/ns_pcb.h>
-
-struct	ns_addr zerons_addr;
-
-ns_pcballoc(so, head)
-	struct socket *so;
-	struct nspcb *head;
-{
-	struct mbuf *m;
-	register struct nspcb *nsp;
-
-	m = m_getclr(M_DONTWAIT, MT_PCB);
-	if (m == NULL)
-		return (ENOBUFS);
-	nsp = mtod(m, struct nspcb *);
-	nsp->nsp_socket = so;
-	insque(nsp, head);
-	so->so_pcb = (caddr_t)nsp;
-	return (0);
-}
-
-ns_pcbbind(nsp, nam)
-	register struct nspcb *nsp;
-	struct mbuf *nam;
-{
-	register struct sockaddr_ns *sns;
-	u_short lport = 0;
-
-	if (nsp->nsp_lport || !ns_nullhost(nsp->nsp_laddr))
-		return (EINVAL);
-	if (nam == 0)
-		goto noname;
-	sns = mtod(nam, struct sockaddr_ns *);
-	if (nam->m_len != sizeof (*sns))
-		return (EINVAL);
-	if (!ns_nullhost(sns->sns_addr)) {
-		int tport = sns->sns_port;
-
-		sns->sns_port = 0;		/* yech... */
-		if (ifa_ifwithaddr((struct sockaddr *)sns) == 0)
-			return (EADDRNOTAVAIL);
-		sns->sns_port = tport;
-	}
-	lport = sns->sns_port;
-	if (lport) {
-		u_short aport = ntohs(lport);
-
-		if (aport < NSPORT_RESERVED &&
-		    (nsp->nsp_socket->so_state & SS_PRIV) == 0)
-			return (EACCES);
-		if (ns_pcblookup(&zerons_addr, lport, 0))
-			return (EADDRINUSE);
-	}
-	nsp->nsp_laddr = sns->sns_addr;
-noname:
-	if (lport == 0)
-		do {
-			if (nspcb.nsp_lport++ < NSPORT_RESERVED)
-				nspcb.nsp_lport = NSPORT_RESERVED;
-			lport = htons(nspcb.nsp_lport);
-		} while (ns_pcblookup(&zerons_addr, lport, 0));
-	nsp->nsp_lport = lport;
-	return (0);
-}
-
-/*
- * Connect from a socket to a specified address.
- * Both address and port must be specified in argument sns.
- * If don't have a local address for this socket yet,
- * then pick one.
- */
-ns_pcbconnect(nsp, nam)
-	struct nspcb *nsp;
-	struct mbuf *nam;
-{
-	struct ns_ifaddr *ia;
-	register struct sockaddr_ns *sns = mtod(nam, struct sockaddr_ns *);
-	register struct ns_addr *dst;
-	register struct route *ro;
-	struct ifnet *ifp;
-
-	if (nam->m_len != sizeof (*sns))
-		return (EINVAL);
-	if (sns->sns_family != AF_NS)
-		return (EAFNOSUPPORT);
-	if (sns->sns_port==0 || ns_nullhost(sns->sns_addr))
-		return (EADDRNOTAVAIL);
-	/*
-	 * If we haven't bound which network number to use as ours,
-	 * we will use the number of the outgoing interface.
-	 * This depends on having done a routing lookup, which
-	 * we will probably have to do anyway, so we might
-	 * as well do it now.  On the other hand if we are
-	 * sending to multiple destinations we may have already
-	 * done the lookup, so see if we can use the route
-	 * from before.  In any case, we only
-	 * chose a port number once, even if sending to multiple
-	 * destinations.
-	 */
-	ro = &nsp->nsp_route;
-	dst = &satons_addr(ro->ro_dst);
-	if (nsp->nsp_socket->so_options & SO_DONTROUTE)
-		goto flush;
-	if (!ns_neteq(nsp->nsp_lastdst, sns->sns_addr))
-		goto flush;
-	if (!ns_hosteq(nsp->nsp_lastdst, sns->sns_addr)) {
-		if (ro->ro_rt && ! (ro->ro_rt->rt_flags & RTF_HOST)) {
-			/* can patch route to avoid rtalloc */
-			*dst = sns->sns_addr;
-		} else {
-	flush:
-			if (ro->ro_rt)
-				RTFREE(ro->ro_rt);
-			ro->ro_rt = (struct rtentry *)0;
-			nsp->nsp_laddr.x_net = ns_zeronet;
-		}
-	}/* else cached route is ok; do nothing */
-	nsp->nsp_lastdst = sns->sns_addr;
-	if ((nsp->nsp_socket->so_options & SO_DONTROUTE) == 0 && /*XXX*/
-	    (ro->ro_rt == (struct rtentry *)0 ||
-	     ro->ro_rt->rt_ifp == (struct ifnet *)0)) {
-		    /* No route yet, so try to acquire one */
-		    ro->ro_dst.sa_family = AF_NS;
-		    ro->ro_dst.sa_len = sizeof(ro->ro_dst);
-		    *dst = sns->sns_addr;
-		    dst->x_port = 0;
-		    rtalloc(ro);
-	}
-	if (ns_neteqnn(nsp->nsp_laddr.x_net, ns_zeronet)) {
-		/*
-		 * If route is known or can be allocated now,
-		 * our src addr is taken from the i/f, else punt.
-		 */
-
-		ia = (struct ns_ifaddr *)0;
-		/*
-		 * If we found a route, use the address
-		 * corresponding to the outgoing interface
-		 */
-		if (ro->ro_rt && (ifp = ro->ro_rt->rt_ifp))
-			for (ia = ns_ifaddr; ia; ia = ia->ia_next)
-				if (ia->ia_ifp == ifp)
-					break;
-		if (ia == 0) {
-			u_short fport = sns->sns_addr.x_port;
-			sns->sns_addr.x_port = 0;
-			ia = (struct ns_ifaddr *)
-				ifa_ifwithdstaddr((struct sockaddr *)sns);
-			sns->sns_addr.x_port = fport;
-			if (ia == 0)
-				ia = ns_iaonnetof(&sns->sns_addr);
-			if (ia == 0)
-				ia = ns_ifaddr;
-			if (ia == 0)
-				return (EADDRNOTAVAIL);
-		}
-		nsp->nsp_laddr.x_net = satons_addr(ia->ia_addr).x_net;
-	}
-	if (ns_pcblookup(&sns->sns_addr, nsp->nsp_lport, 0))
-		return (EADDRINUSE);
-	if (ns_nullhost(nsp->nsp_laddr)) {
-		if (nsp->nsp_lport == 0)
-			(void) ns_pcbbind(nsp, (struct mbuf *)0);
-		nsp->nsp_laddr.x_host = ns_thishost;
-	}
-	nsp->nsp_faddr = sns->sns_addr;
-	/* Includes nsp->nsp_fport = sns->sns_port; */
-	return (0);
-}
-
-ns_pcbdisconnect(nsp)
-	struct nspcb *nsp;
-{
-
-	nsp->nsp_faddr = zerons_addr;
-	if (nsp->nsp_socket->so_state & SS_NOFDREF)
-		ns_pcbdetach(nsp);
-}
-
-ns_pcbdetach(nsp)
-	struct nspcb *nsp;
-{
-	struct socket *so = nsp->nsp_socket;
-
-	so->so_pcb = 0;
-	sotryfree(so);
-	if (nsp->nsp_route.ro_rt)
-		rtfree(nsp->nsp_route.ro_rt);
-	remque(nsp);
-	(void) m_free(dtom(nsp));
-}
-
-ns_setsockaddr(nsp, nam)
-	register struct nspcb *nsp;
-	struct mbuf *nam;
-{
-	register struct sockaddr_ns *sns = mtod(nam, struct sockaddr_ns *);
-
-	nam->m_len = sizeof (*sns);
-	sns = mtod(nam, struct sockaddr_ns *);
-	bzero((caddr_t)sns, sizeof (*sns));
-	sns->sns_len = sizeof(*sns);
-	sns->sns_family = AF_NS;
-	sns->sns_addr = nsp->nsp_laddr;
-}
-
-ns_setpeeraddr(nsp, nam)
-	register struct nspcb *nsp;
-	struct mbuf *nam;
-{
-	register struct sockaddr_ns *sns = mtod(nam, struct sockaddr_ns *);
-
-	nam->m_len = sizeof (*sns);
-	sns = mtod(nam, struct sockaddr_ns *);
-	bzero((caddr_t)sns, sizeof (*sns));
-	sns->sns_len = sizeof(*sns);
-	sns->sns_family = AF_NS;
-	sns->sns_addr  = nsp->nsp_faddr;
-}
-
-/*
- * Pass some notification to all connections of a protocol
- * associated with address dst.  Call the
- * protocol specific routine to handle each connection.
- * Also pass an extra paramter via the nspcb. (which may in fact
- * be a parameter list!)
- */
-ns_pcbnotify(dst, errno, notify, param)
-	register struct ns_addr *dst;
-	long param;
-	int errno, (*notify)();
-{
-	register struct nspcb *nsp, *oinp;
-	int s = splimp();
-
-	for (nsp = (&nspcb)->nsp_next; nsp != (&nspcb);) {
-		if (!ns_hosteq(*dst,nsp->nsp_faddr)) {
-	next:
-			nsp = nsp->nsp_next;
-			continue;
-		}
-		if (nsp->nsp_socket == 0)
-			goto next;
-		if (errno)
-			nsp->nsp_socket->so_error = errno;
-		oinp = nsp;
-		nsp = nsp->nsp_next;
-		oinp->nsp_notify_param = param;
-		(*notify)(oinp);
-	}
-	splx(s);
-}
-
-#ifdef notdef
-/*
- * After a routing change, flush old routing
- * and allocate a (hopefully) better one.
- */
-ns_rtchange(nsp)
-	struct nspcb *nsp;
-{
-	if (nsp->nsp_route.ro_rt) {
-		rtfree(nsp->nsp_route.ro_rt);
-		nsp->nsp_route.ro_rt = 0;
-		/*
-		 * A new route can be allocated the next time
-		 * output is attempted.
-		 */
-	}
-	/* SHOULD NOTIFY HIGHER-LEVEL PROTOCOLS */
-}
-#endif
-
-struct nspcb *
-ns_pcblookup(faddr, lport, wildp)
-	struct ns_addr *faddr;
-	u_short lport;
-{
-	register struct nspcb *nsp, *match = 0;
-	int matchwild = 3, wildcard;
-	u_short fport;
-
-	fport = faddr->x_port;
-	for (nsp = (&nspcb)->nsp_next; nsp != (&nspcb); nsp = nsp->nsp_next) {
-		if (nsp->nsp_lport != lport)
-			continue;
-		wildcard = 0;
-		if (ns_nullhost(nsp->nsp_faddr)) {
-			if (!ns_nullhost(*faddr))
-				wildcard++;
-		} else {
-			if (ns_nullhost(*faddr))
-				wildcard++;
-			else {
-				if (!ns_hosteq(nsp->nsp_faddr, *faddr))
-					continue;
-				if (nsp->nsp_fport != fport) {
-					if (nsp->nsp_fport != 0)
-						continue;
-					else
-						wildcard++;
-				}
-			}
-		}
-		if (wildcard && wildp==0)
-			continue;
-		if (wildcard < matchwild) {
-			match = nsp;
-			matchwild = wildcard;
-			if (wildcard == 0)
-				break;
-		}
-	}
-	return (match);
-}
diff --git a/sys/netns/ns_pcb.h b/sys/netns/ns_pcb.h
deleted file mode 100644
index 2d82ba6..0000000
--- a/sys/netns/ns_pcb.h
+++ /dev/null
@@ -1,85 +0,0 @@
-/*
- * 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_pcb.h	8.1 (Berkeley) 6/10/93
- * $FreeBSD$
- */
-
-#ifndef _NETNS_NS_PCB_H_
-#define _NETNS_NS_PCB_H_
-
-/*
- * Ns protocol interface control block.
- */
-struct nspcb {
-	struct	nspcb *nsp_next;	/* doubly linked list */
-	struct	nspcb *nsp_prev;
-	struct	socket *nsp_socket;	/* back pointer to socket */
-	struct	ns_addr nsp_faddr;	/* destination address */
-	struct	ns_addr nsp_laddr;	/* socket's address */
-	caddr_t	nsp_pcb;		/* protocol specific stuff */
-	struct	route nsp_route;	/* routing information */
-	struct	ns_addr nsp_lastdst;	/* validate cached route for dg socks*/
-	long	nsp_notify_param;	/* extra info passed via ns_pcbnotify*/
-	short	nsp_flags;
-	u_char	nsp_dpt;		/* default packet type for idp_output*/
-	u_char	nsp_rpt;		/* last received packet type by
-								idp_input() */
-};
-
-/* possible flags */
-
-#define NSP_IN_ABORT	0x1		/* calling abort through socket */
-#define NSP_RAWIN	0x2		/* show headers on input */
-#define NSP_RAWOUT	0x4		/* show header on output */
-#define NSP_ALL_PACKETS	0x8		/* Turn off higher proto processing */
-
-#define	NS_WILDCARD	1
-
-#define nsp_lport nsp_laddr.x_port
-#define nsp_fport nsp_faddr.x_port
-
-#define	sotonspcb(so)		((struct nspcb *)((so)->so_pcb))
-
-/*
- * Nominal space allocated to a ns socket.
- */
-#define	NSSNDQ		2048
-#define	NSRCVQ		2048
-
-
-#ifdef _KERNEL
-struct	nspcb nspcb;			/* head of list */
-struct	nspcb *ns_pcblookup();
-#endif
-
-#endif
diff --git a/sys/netns/ns_proto.c b/sys/netns/ns_proto.c
deleted file mode 100644
index 1bee0e4..0000000
--- a/sys/netns/ns_proto.c
+++ /dev/null
@@ -1,99 +0,0 @@
-/*
- * 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.
- *
- *	From: @(#)ns_proto.c	8.1 (Berkeley) 6/10/93
- * $FreeBSD$
- */
-
-#include <sys/param.h>
-#include <sys/kernel.h>
-#include <sys/socket.h>
-#include <sys/protosw.h>
-#include <sys/domain.h>
-#include <sys/mbuf.h>
-
-#include <net/radix.h>
-
-#include <netns/ns.h>
-
-/*
- * NS protocol family: IDP, ERR, PE, SPP, ROUTE.
- */
-int	ns_init();
-int	idp_input(), idp_output(), idp_ctlinput(), idp_usrreq();
-int	idp_raw_usrreq(), idp_ctloutput();
-int	spp_input(), spp_ctlinput();
-int	spp_usrreq(), spp_usrreq_sp(), spp_ctloutput();
-int	spp_init(), spp_fasttimo(), spp_slowtimo();
-extern	int raw_usrreq();
-
-extern	struct domain nsdomain;
-
-struct protosw nssw[] = {
-{ 0,		&nsdomain,	0,		0,
-  0,		idp_output,	0,		0,
-  0,
-  ns_init,	0,		0,		0,
-},
-{ SOCK_DGRAM,	&nsdomain,	0,		PR_ATOMIC|PR_ADDR,
-  0,		0,		idp_ctlinput,	idp_ctloutput,
-  idp_usrreq,
-  0,		0,		0,		0,
-},
-{ SOCK_STREAM,	&nsdomain,	NSPROTO_SPP,	PR_CONNREQUIRED|PR_WANTRCVD,
-  spp_input,	0,		spp_ctlinput,	spp_ctloutput,
-  spp_usrreq,
-  spp_init,	spp_fasttimo,	spp_slowtimo,	0,
-},
-{ SOCK_SEQPACKET,&nsdomain,	NSPROTO_SPP,	PR_CONNREQUIRED|PR_WANTRCVD|PR_ATOMIC,
-  spp_input,	0,		spp_ctlinput,	spp_ctloutput,
-  spp_usrreq_sp,
-  0,		0,		0,		0,
-},
-{ SOCK_RAW,	&nsdomain,	NSPROTO_RAW,	PR_ATOMIC|PR_ADDR,
-  idp_input,	idp_output,	0,		idp_ctloutput,
-  idp_raw_usrreq,
-  0,		0,		0,		0,
-},
-{ SOCK_RAW,	&nsdomain,	NSPROTO_ERROR,	PR_ATOMIC|PR_ADDR,
-  idp_ctlinput,	idp_output,	0,		idp_ctloutput,
-  idp_raw_usrreq,
-  0,		0,		0,		0,
-},
-};
-
-struct domain nsdomain =
-    { AF_NS, "network systems", 0, 0, 0,
-      nssw, &nssw[sizeof(nssw)/sizeof(nssw[0])], 0,
-      rn_inithead, 16, sizeof(struct sockaddr_ns)};
-
-DOMAIN_SET(ns);
diff --git a/sys/netns/sp.h b/sys/netns/sp.h
deleted file mode 100644
index adef4fd..0000000
--- a/sys/netns/sp.h
+++ /dev/null
@@ -1,58 +0,0 @@
-/*
- * 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.
- *
- *	@(#)sp.h	8.1 (Berkeley) 6/10/93
- * $FreeBSD$
- */
-
-#ifndef _NETNS_SP_H_
-#define _NETNS_SP_H_
-
-/*
- * Definitions for Xerox NS style sequenced packet protocol
- */
-
-struct sphdr {
-	u_char	sp_cc;		/* connection control */
-	u_char	sp_dt;		/* datastream type */
-#define	SP_SP	0x80		/* system packet */
-#define	SP_SA	0x40		/* send acknowledgement */
-#define	SP_OB	0x20		/* attention (out of band data) */
-#define	SP_EM	0x10		/* end of message */
-	u_short	sp_sid;		/* source connection identifier */
-	u_short	sp_did;		/* destination connection identifier */
-	u_short	sp_seq;		/* sequence number */
-	u_short	sp_ack;		/* acknowledge number */
-	u_short	sp_alo;		/* allocation number */
-};
-
-#endif
diff --git a/sys/netns/spidp.h b/sys/netns/spidp.h
deleted file mode 100644
index 3920f67..0000000
--- a/sys/netns/spidp.h
+++ /dev/null
@@ -1,68 +0,0 @@
-/*
- * 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.
- *
- *	@(#)spidp.h	8.1 (Berkeley) 6/10/93
- * $FreeBSD$
- */
-
-#ifndef _NETNS_SPIDP_H_
-#define _NETNS_SPIDP_H_
-
-/*
- * Definitions for NS(tm) Internet Datagram Protocol
- * containing a Sequenced Packet Protocol packet.
- */
-struct spidp {
-	struct idp	si_i;
-	struct sphdr 	si_s;
-};
-struct spidp_q {
-	struct spidp_q	*si_next;
-	struct spidp_q	*si_prev;
-};
-#define SI(x)	((struct spidp *)x)
-#define si_sum	si_i.idp_sum
-#define si_len	si_i.idp_len
-#define si_tc	si_i.idp_tc
-#define si_pt	si_i.idp_pt
-#define si_dna	si_i.idp_dna
-#define si_sna	si_i.idp_sna
-#define si_sport	si_i.idp_sna.x_port
-#define si_cc	si_s.sp_cc
-#define si_dt	si_s.sp_dt
-#define si_sid	si_s.sp_sid
-#define si_did	si_s.sp_did
-#define si_seq	si_s.sp_seq
-#define si_ack	si_s.sp_ack
-#define si_alo	si_s.sp_alo
-
-#endif
diff --git a/sys/netns/spp_debug.c b/sys/netns/spp_debug.c
deleted file mode 100644
index 840d93a..0000000
--- a/sys/netns/spp_debug.c
+++ /dev/null
@@ -1,173 +0,0 @@
-/*
- * 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.
- *
- *	@(#)spp_debug.c	8.1 (Berkeley) 6/10/93
- * $FreeBSD$
- */
-
-#include "opt_inet.h"
-
-#include <sys/param.h>
-#include <sys/systm.h>
-#include <sys/mbuf.h>
-#include <sys/socket.h>
-#include <sys/socketvar.h>
-#include <sys/protosw.h>
-#include <sys/errno.h>
-
-#include <net/route.h>
-#include <net/if.h>
-#include <netinet/tcp_fsm.h>
-
-#include <netns/ns.h>
-#include <netns/ns_pcb.h>
-#include <netns/idp.h>
-#include <netns/idp_var.h>
-#include <netns/sp.h>
-#include <netns/spidp.h>
-#define SPPTIMERS
-#include <netns/spp_timer.h>
-#include <netns/spp_var.h>
-#define	SANAMES
-#include <netns/spp_debug.h>
-
-int	sppconsdebug = 0;
-/*
- * spp debug routines
- */
-spp_trace(act, ostate, sp, si, req)
-	short act;
-	u_char ostate;
-	struct sppcb *sp;
-	struct spidp *si;
-	int req;
-{
-#ifdef INET
-#ifdef TCPDEBUG
-	u_short seq, ack, len, alo;
-	unsigned long iptime();
-	int flags;
-	struct spp_debug *sd = &spp_debug[spp_debx++];
-	extern char *prurequests[];
-	extern char *sanames[];
-	extern char *tcpstates[];
-	extern char *spptimers[];
-
-	if (spp_debx == SPP_NDEBUG)
-		spp_debx = 0;
-	sd->sd_time = iptime();
-	sd->sd_act = act;
-	sd->sd_ostate = ostate;
-	sd->sd_cb = (caddr_t)sp;
-	if (sp)
-		sd->sd_sp = *sp;
-	else
-		bzero((caddr_t)&sd->sd_sp, sizeof (*sp));
-	if (si)
-		sd->sd_si = *si;
-	else
-		bzero((caddr_t)&sd->sd_si, sizeof (*si));
-	sd->sd_req = req;
-	if (sppconsdebug == 0)
-		return;
-	if (ostate >= TCP_NSTATES) ostate = 0;
-	if (act >= SA_DROP) act = SA_DROP;
-	if (sp)
-		printf("%x %s:", sp, tcpstates[ostate]);
-	else
-		printf("???????? ");
-	printf("%s ", sanames[act]);
-	switch (act) {
-
-	case SA_RESPOND:
-	case SA_INPUT:
-	case SA_OUTPUT:
-	case SA_DROP:
-		if (si == 0)
-			break;
-		seq = si->si_seq;
-		ack = si->si_ack;
-		alo = si->si_alo;
-		len = si->si_len;
-		if (act == SA_OUTPUT) {
-			seq = ntohs(seq);
-			ack = ntohs(ack);
-			alo = ntohs(alo);
-			len = ntohs(len);
-		}
-#ifndef lint
-#define p1(f)  { printf("%s = %x, ", "f", f); }
-		p1(seq); p1(ack); p1(alo); p1(len);
-#endif
-		flags = si->si_cc;
-		if (flags) {
-			char *cp = "<";
-#ifndef lint
-#define pf(f) { if (flags&SP_/**/f) { printf("%s%s", cp, "f"); cp = ","; } }
-			pf(SP); pf(SA); pf(OB); pf(EM);
-#else
-			cp = cp;
-#endif
-			printf(">");
-		}
-#ifndef lint
-#define p2(f)  { printf("%s = %x, ", "f", si->si_/**/f); }
-		p2(sid);p2(did);p2(dt);p2(pt);
-#endif
-		ns_printhost(&si->si_sna);
-		ns_printhost(&si->si_dna);
-
-		if (act==SA_RESPOND) {
-			printf("idp_len = %x, ",
-				((struct idp *)si)->idp_len);
-		}
-		break;
-
-	case SA_USER:
-		printf("%s", prurequests[req&0xff]);
-		if ((req & 0xff) == PRU_SLOWTIMO)
-			printf("<%s>", spptimers[req>>8]);
-		break;
-	}
-	if (sp)
-		printf(" -> %s", tcpstates[sp->s_state]);
-	/* print out internal state of sp !?! */
-	printf("\n");
-	if (sp == 0)
-		return;
-#ifndef lint
-#define p3(f)  { printf("%s = %x, ", "f", sp->s_/**/f); }
-	printf("\t"); p3(rack);p3(ralo);p3(smax);p3(flags); printf("\n");
-#endif
-#endif
-#endif
-}
diff --git a/sys/netns/spp_debug.h b/sys/netns/spp_debug.h
deleted file mode 100644
index db0d713..0000000
--- a/sys/netns/spp_debug.h
+++ /dev/null
@@ -1,65 +0,0 @@
-/*
- * 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.
- *
- *	@(#)spp_debug.h	8.1 (Berkeley) 6/10/93
- * $FreeBSD$
- */
-
-#ifndef _NETNS_SPP_DEBUG_H_
-#define _NETNS_SPP_DEBUG_H_
-
-struct	spp_debug {
-	u_long	sd_time;
-	short	sd_act;
-	short	sd_ostate;
-	caddr_t	sd_cb;
-	short	sd_req;
-	struct	spidp sd_si;
-	struct	sppcb sd_sp;
-};
-
-#define	SA_INPUT 	0
-#define	SA_OUTPUT	1
-#define	SA_USER		2
-#define	SA_RESPOND	3
-#define	SA_DROP		4
-
-#ifdef SANAMES
-char	*sanames[] =
-    { "input", "output", "user", "respond", "drop" };
-#endif
-
-#define	SPP_NDEBUG 100
-struct	spp_debug spp_debug[SPP_NDEBUG];
-int	spp_debx;
-
-#endif
diff --git a/sys/netns/spp_timer.h b/sys/netns/spp_timer.h
deleted file mode 100644
index 435df92..0000000
--- a/sys/netns/spp_timer.h
+++ /dev/null
@@ -1,128 +0,0 @@
-/*
- * Copyright (c) 1982, 1986, 1988, 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.
- *
- *	@(#)spp_timer.h	8.1 (Berkeley) 6/10/93
- * $FreeBSD$
- */
-
-#ifndef _NETNS_SPP_TIMER_H_
-#define _NETNS_SPP_TIMER_H_
-
-/*
- * Definitions of the SPP timers.  These timers are counted
- * down PR_SLOWHZ times a second.
- */
-#define	SPPT_NTIMERS	4
-
-#define	SPPT_REXMT	0		/* retransmit */
-#define	SPPT_PERSIST	1		/* retransmit persistance */
-#define	SPPT_KEEP	2		/* keep alive */
-#define	SPPT_2MSL	3		/* 2*msl quiet time timer */
-
-/*
- * The SPPT_REXMT timer is used to force retransmissions.
- * The SPP has the SPPT_REXMT timer set whenever segments
- * have been sent for which ACKs are expected but not yet
- * received.  If an ACK is received which advances tp->snd_una,
- * then the retransmit timer is cleared (if there are no more
- * outstanding segments) or reset to the base value (if there
- * are more ACKs expected).  Whenever the retransmit timer goes off,
- * we retransmit one unacknowledged segment, and do a backoff
- * on the retransmit timer.
- *
- * The SPPT_PERSIST timer is used to keep window size information
- * flowing even if the window goes shut.  If all previous transmissions
- * have been acknowledged (so that there are no retransmissions in progress),
- * and the window is too small to bother sending anything, then we start
- * the SPPT_PERSIST timer.  When it expires, if the window is nonzero,
- * we go to transmit state.  Otherwise, at intervals send a single byte
- * into the peer's window to force him to update our window information.
- * We do this at most as often as SPPT_PERSMIN time intervals,
- * but no more frequently than the current estimate of round-trip
- * packet time.  The SPPT_PERSIST timer is cleared whenever we receive
- * a window update from the peer.
- *
- * The SPPT_KEEP timer is used to keep connections alive.  If an
- * connection is idle (no segments received) for SPPTV_KEEP amount of time,
- * but not yet established, then we drop the connection.  If the connection
- * is established, then we force the peer to send us a segment by sending:
- *	<SEQ=SND.UNA-1><ACK=RCV.NXT><CTL=ACK>
- * This segment is (deliberately) outside the window, and should elicit
- * an ack segment in response from the peer.  If, despite the SPPT_KEEP
- * initiated segments we cannot elicit a response from a peer in SPPT_MAXIDLE
- * amount of time, then we drop the connection.
- */
-
-#define	SPP_TTL		30		/* default time to live for SPP segs */
-/*
- * Time constants.
- */
-#define	SPPTV_MSL	( 15*PR_SLOWHZ)		/* max seg lifetime */
-#define	SPPTV_SRTTBASE	0			/* base roundtrip time;
-						   if 0, no idea yet */
-#define	SPPTV_SRTTDFLT	(  3*PR_SLOWHZ)		/* assumed RTT if no info */
-
-#define	SPPTV_PERSMIN	(  5*PR_SLOWHZ)		/* retransmit persistance */
-#define	SPPTV_PERSMAX	( 60*PR_SLOWHZ)		/* maximum persist interval */
-
-#define	SPPTV_KEEP	( 75*PR_SLOWHZ)		/* keep alive - 75 secs */
-#define	SPPTV_MAXIDLE	(  8*SPPTV_KEEP)	/* maximum allowable idle
-						   time before drop conn */
-
-#define	SPPTV_MIN	(  1*PR_SLOWHZ)		/* minimum allowable value */
-#define	SPPTV_REXMTMAX	( 64*PR_SLOWHZ)		/* max allowable REXMT value */
-
-#define	SPP_LINGERTIME	120			/* linger at most 2 minutes */
-
-#define	SPP_MAXRXTSHIFT	12			/* maximum retransmits */
-
-#ifdef	SPPTIMERS
-char *spptimers[] =
-    { "REXMT", "PERSIST", "KEEP", "2MSL" };
-#endif
-
-/*
- * Force a time value to be in a certain range.
- */
-#define	SPPT_RANGESET(tv, value, tvmin, tvmax) { \
-	(tv) = (value); \
-	if ((tv) < (tvmin)) \
-		(tv) = (tvmin); \
-	else if ((tv) > (tvmax)) \
-		(tv) = (tvmax); \
-}
-
-#ifdef _KERNEL
-extern int spp_backoff[];
-#endif
-
-#endif
diff --git a/sys/netns/spp_usrreq.c b/sys/netns/spp_usrreq.c
deleted file mode 100644
index c942884..0000000
--- a/sys/netns/spp_usrreq.c
+++ /dev/null
@@ -1,1804 +0,0 @@
-/*
- * 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.
- *
- *	@(#)spp_usrreq.c	8.1 (Berkeley) 6/10/93
- * $FreeBSD$
- */
-
-#include <sys/param.h>
-#include <sys/systm.h>
-#include <sys/malloc.h>
-#include <sys/mbuf.h>
-#include <sys/protosw.h>
-#include <sys/socket.h>
-#include <sys/socketvar.h>
-#include <sys/errno.h>
-
-#include <net/if.h>
-#include <net/route.h>
-#include <netinet/tcp_fsm.h>
-
-#include <netns/ns.h>
-#include <netns/ns_pcb.h>
-#include <netns/idp.h>
-#include <netns/idp_var.h>
-#include <netns/ns_error.h>
-#include <netns/sp.h>
-#include <netns/spidp.h>
-#include <netns/spp_timer.h>
-#include <netns/spp_var.h>
-#include <netns/spp_debug.h>
-
-/*
- * SP protocol implementation.
- */
-spp_init()
-{
-
-	spp_iss = 1; /* WRONG !! should fish it out of TODR */
-}
-struct spidp spp_savesi;
-int traceallspps = 0;
-extern int sppconsdebug;
-int spp_hardnosed;
-int spp_use_delack = 0;
-u_short spp_newchecks[50];
-
-/*ARGSUSED*/
-spp_input(m, nsp)
-	register struct mbuf *m;
-	register struct nspcb *nsp;
-{
-	register struct sppcb *cb;
-	register struct spidp *si = mtod(m, struct spidp *);
-	register struct socket *so;
-	short ostate;
-	int dropsocket = 0;
-
-
-	sppstat.spps_rcvtotal++;
-	if (nsp == 0) {
-		panic("No nspcb in spp_input");
-		return;
-	}
-
-	cb = nstosppcb(nsp);
-	if (cb == 0) goto bad;
-
-	if (m->m_len < sizeof(*si)) {
-		if ((m = m_pullup(m, sizeof(*si))) == 0) {
-			sppstat.spps_rcvshort++;
-			return;
-		}
-		si = mtod(m, struct spidp *);
-	}
-	si->si_seq = ntohs(si->si_seq);
-	si->si_ack = ntohs(si->si_ack);
-	si->si_alo = ntohs(si->si_alo);
-
-	so = nsp->nsp_socket;
-	if (so->so_options & SO_DEBUG || traceallspps) {
-		ostate = cb->s_state;
-		spp_savesi = *si;
-	}
-	if (so->so_options & SO_ACCEPTCONN) {
-		struct sppcb *ocb = cb;
-
-		so = sonewconn(so, 0);
-		if (so == 0) {
-			goto drop;
-		}
-		/*
-		 * This is ugly, but ....
-		 *
-		 * Mark socket as temporary until we're
-		 * committed to keeping it.  The code at
-		 * ``drop'' and ``dropwithreset'' check the
-		 * flag dropsocket to see if the temporary
-		 * socket created here should be discarded.
-		 * We mark the socket as discardable until
-		 * we're committed to it below in TCPS_LISTEN.
-		 */
-		dropsocket++;
-		nsp = (struct nspcb *)so->so_pcb;
-		nsp->nsp_laddr = si->si_dna;
-		cb = nstosppcb(nsp);
-		cb->s_mtu = ocb->s_mtu;		/* preserve sockopts */
-		cb->s_flags = ocb->s_flags;	/* preserve sockopts */
-		cb->s_flags2 = ocb->s_flags2;	/* preserve sockopts */
-		cb->s_state = TCPS_LISTEN;
-	}
-
-	/*
-	 * Packet received on connection.
-	 * reset idle time and keep-alive timer;
-	 */
-	cb->s_idle = 0;
-	cb->s_timer[SPPT_KEEP] = SPPTV_KEEP;
-
-	switch (cb->s_state) {
-
-	case TCPS_LISTEN:{
-		struct mbuf *am;
-		register struct sockaddr_ns *sns;
-		struct ns_addr laddr;
-
-		/*
-		 * If somebody here was carying on a conversation
-		 * and went away, and his pen pal thinks he can
-		 * still talk, we get the misdirected packet.
-		 */
-		if (spp_hardnosed && (si->si_did != 0 || si->si_seq != 0)) {
-			spp_istat.gonawy++;
-			goto dropwithreset;
-		}
-		am = m_get(M_DONTWAIT, MT_SONAME);
-		if (am == NULL)
-			goto drop;
-		am->m_len = sizeof (struct sockaddr_ns);
-		sns = mtod(am, struct sockaddr_ns *);
-		sns->sns_len = sizeof(*sns);
-		sns->sns_family = AF_NS;
-		sns->sns_addr = si->si_sna;
-		laddr = nsp->nsp_laddr;
-		if (ns_nullhost(laddr))
-			nsp->nsp_laddr = si->si_dna;
-		if (ns_pcbconnect(nsp, am)) {
-			nsp->nsp_laddr = laddr;
-			(void) m_free(am);
-			spp_istat.noconn++;
-			goto drop;
-		}
-		(void) m_free(am);
-		spp_template(cb);
-		dropsocket = 0;		/* committed to socket */
-		cb->s_did = si->si_sid;
-		cb->s_rack = si->si_ack;
-		cb->s_ralo = si->si_alo;
-#define THREEWAYSHAKE
-#ifdef THREEWAYSHAKE
-		cb->s_state = TCPS_SYN_RECEIVED;
-		cb->s_force = 1 + SPPT_KEEP;
-		sppstat.spps_accepts++;
-		cb->s_timer[SPPT_KEEP] = SPPTV_KEEP;
-		}
-		break;
-	/*
-	 * This state means that we have heard a response
-	 * to our acceptance of their connection
-	 * It is probably logically unnecessary in this
-	 * implementation.
-	 */
-	 case TCPS_SYN_RECEIVED: {
-		if (si->si_did!=cb->s_sid) {
-			spp_istat.wrncon++;
-			goto drop;
-		}
-#endif
-		nsp->nsp_fport =  si->si_sport;
-		cb->s_timer[SPPT_REXMT] = 0;
-		cb->s_timer[SPPT_KEEP] = SPPTV_KEEP;
-		soisconnected(so);
-		cb->s_state = TCPS_ESTABLISHED;
-		sppstat.spps_accepts++;
-		}
-		break;
-
-	/*
-	 * This state means that we have gotten a response
-	 * to our attempt to establish a connection.
-	 * We fill in the data from the other side,
-	 * telling us which port to respond to, instead of the well-
-	 * known one we might have sent to in the first place.
-	 * We also require that this is a response to our
-	 * connection id.
-	 */
-	case TCPS_SYN_SENT:
-		if (si->si_did!=cb->s_sid) {
-			spp_istat.notme++;
-			goto drop;
-		}
-		sppstat.spps_connects++;
-		cb->s_did = si->si_sid;
-		cb->s_rack = si->si_ack;
-		cb->s_ralo = si->si_alo;
-		cb->s_dport = nsp->nsp_fport =  si->si_sport;
-		cb->s_timer[SPPT_REXMT] = 0;
-		cb->s_flags |= SF_ACKNOW;
-		soisconnected(so);
-		cb->s_state = TCPS_ESTABLISHED;
-		/* Use roundtrip time of connection request for initial rtt */
-		if (cb->s_rtt) {
-			cb->s_srtt = cb->s_rtt << 3;
-			cb->s_rttvar = cb->s_rtt << 1;
-			SPPT_RANGESET(cb->s_rxtcur,
-			    ((cb->s_srtt >> 2) + cb->s_rttvar) >> 1,
-			    SPPTV_MIN, SPPTV_REXMTMAX);
-			    cb->s_rtt = 0;
-		}
-	}
-	if (so->so_options & SO_DEBUG || traceallspps)
-		spp_trace(SA_INPUT, (u_char)ostate, cb, &spp_savesi, 0);
-
-	m->m_len -= sizeof (struct idp);
-	m->m_pkthdr.len -= sizeof (struct idp);
-	m->m_data += sizeof (struct idp);
-
-	if (spp_reass(cb, si)) {
-		(void) m_freem(m);
-	}
-	if (cb->s_force || (cb->s_flags & (SF_ACKNOW|SF_WIN|SF_RXT)))
-		(void) spp_output(cb, (struct mbuf *)0);
-	cb->s_flags &= ~(SF_WIN|SF_RXT);
-	return;
-
-dropwithreset:
-	if (dropsocket)
-		(void) soabort(so);
-	si->si_seq = ntohs(si->si_seq);
-	si->si_ack = ntohs(si->si_ack);
-	si->si_alo = ntohs(si->si_alo);
-	ns_error(dtom(si), NS_ERR_NOSOCK, 0);
-	if (cb->s_nspcb->nsp_socket->so_options & SO_DEBUG || traceallspps)
-		spp_trace(SA_DROP, (u_char)ostate, cb, &spp_savesi, 0);
-	return;
-
-drop:
-bad:
-	if (cb == 0 || cb->s_nspcb->nsp_socket->so_options & SO_DEBUG ||
-            traceallspps)
-		spp_trace(SA_DROP, (u_char)ostate, cb, &spp_savesi, 0);
-	m_freem(m);
-}
-
-int spprexmtthresh = 3;
-
-/*
- * This is structurally similar to the tcp reassembly routine
- * but its function is somewhat different:  It merely queues
- * packets up, and suppresses duplicates.
- */
-spp_reass(cb, si)
-register struct sppcb *cb;
-register struct spidp *si;
-{
-	register struct spidp_q *q;
-	register struct mbuf *m;
-	register struct socket *so = cb->s_nspcb->nsp_socket;
-	char packetp = cb->s_flags & SF_HI;
-	int incr;
-	char wakeup = 0;
-
-	if (si == SI(0))
-		goto present;
-	/*
-	 * Update our news from them.
-	 */
-	if (si->si_cc & SP_SA)
-		cb->s_flags |= (spp_use_delack ? SF_DELACK : SF_ACKNOW);
-	if (SSEQ_GT(si->si_alo, cb->s_ralo))
-		cb->s_flags |= SF_WIN;
-	if (SSEQ_LEQ(si->si_ack, cb->s_rack)) {
-		if ((si->si_cc & SP_SP) && cb->s_rack != (cb->s_smax + 1)) {
-			sppstat.spps_rcvdupack++;
-			/*
-			 * If this is a completely duplicate ack
-			 * and other conditions hold, we assume
-			 * a packet has been dropped and retransmit
-			 * it exactly as in tcp_input().
-			 */
-			if (si->si_ack != cb->s_rack ||
-			    si->si_alo != cb->s_ralo)
-				cb->s_dupacks = 0;
-			else if (++cb->s_dupacks == spprexmtthresh) {
-				u_short onxt = cb->s_snxt;
-				int cwnd = cb->s_cwnd;
-
-				cb->s_snxt = si->si_ack;
-				cb->s_cwnd = CUNIT;
-				cb->s_force = 1 + SPPT_REXMT;
-				(void) spp_output(cb, (struct mbuf *)0);
-				cb->s_timer[SPPT_REXMT] = cb->s_rxtcur;
-				cb->s_rtt = 0;
-				if (cwnd >= 4 * CUNIT)
-					cb->s_cwnd = cwnd / 2;
-				if (SSEQ_GT(onxt, cb->s_snxt))
-					cb->s_snxt = onxt;
-				return (1);
-			}
-		} else
-			cb->s_dupacks = 0;
-		goto update_window;
-	}
-	cb->s_dupacks = 0;
-	/*
-	 * If our correspondent acknowledges data we haven't sent
-	 * TCP would drop the packet after acking.  We'll be a little
-	 * more permissive
-	 */
-	if (SSEQ_GT(si->si_ack, (cb->s_smax + 1))) {
-		sppstat.spps_rcvacktoomuch++;
-		si->si_ack = cb->s_smax + 1;
-	}
-	sppstat.spps_rcvackpack++;
-	/*
-	 * If transmit timer is running and timed sequence
-	 * number was acked, update smoothed round trip time.
-	 * See discussion of algorithm in tcp_input.c
-	 */
-	if (cb->s_rtt && SSEQ_GT(si->si_ack, cb->s_rtseq)) {
-		sppstat.spps_rttupdated++;
-		if (cb->s_srtt != 0) {
-			register short delta;
-			delta = cb->s_rtt - (cb->s_srtt >> 3);
-			if ((cb->s_srtt += delta) <= 0)
-				cb->s_srtt = 1;
-			if (delta < 0)
-				delta = -delta;
-			delta -= (cb->s_rttvar >> 2);
-			if ((cb->s_rttvar += delta) <= 0)
-				cb->s_rttvar = 1;
-		} else {
-			/*
-			 * No rtt measurement yet
-			 */
-			cb->s_srtt = cb->s_rtt << 3;
-			cb->s_rttvar = cb->s_rtt << 1;
-		}
-		cb->s_rtt = 0;
-		cb->s_rxtshift = 0;
-		SPPT_RANGESET(cb->s_rxtcur,
-			((cb->s_srtt >> 2) + cb->s_rttvar) >> 1,
-			SPPTV_MIN, SPPTV_REXMTMAX);
-	}
-	/*
-	 * If all outstanding data is acked, stop retransmit
-	 * timer and remember to restart (more output or persist).
-	 * If there is more data to be acked, restart retransmit
-	 * timer, using current (possibly backed-off) value;
-	 */
-	if (si->si_ack == cb->s_smax + 1) {
-		cb->s_timer[SPPT_REXMT] = 0;
-		cb->s_flags |= SF_RXT;
-	} else if (cb->s_timer[SPPT_PERSIST] == 0)
-		cb->s_timer[SPPT_REXMT] = cb->s_rxtcur;
-	/*
-	 * When new data is acked, open the congestion window.
-	 * If the window gives us less than ssthresh packets
-	 * in flight, open exponentially (maxseg at a time).
-	 * Otherwise open linearly (maxseg^2 / cwnd at a time).
-	 */
-	incr = CUNIT;
-	if (cb->s_cwnd > cb->s_ssthresh)
-		incr = max(incr * incr / cb->s_cwnd, 1);
-	cb->s_cwnd = min(cb->s_cwnd + incr, cb->s_cwmx);
-	/*
-	 * Trim Acked data from output queue.
-	 */
-	while ((m = so->so_snd.sb_mb) != NULL) {
-		if (SSEQ_LT((mtod(m, struct spidp *))->si_seq, si->si_ack))
-			sbdroprecord(&so->so_snd);
-		else
-			break;
-	}
-	sowwakeup(so);
-	cb->s_rack = si->si_ack;
-update_window:
-	if (SSEQ_LT(cb->s_snxt, cb->s_rack))
-		cb->s_snxt = cb->s_rack;
-	if (SSEQ_LT(cb->s_swl1, si->si_seq) || cb->s_swl1 == si->si_seq &&
-	    (SSEQ_LT(cb->s_swl2, si->si_ack) ||
-	     cb->s_swl2 == si->si_ack && SSEQ_LT(cb->s_ralo, si->si_alo))) {
-		/* keep track of pure window updates */
-		if ((si->si_cc & SP_SP) && cb->s_swl2 == si->si_ack
-		    && SSEQ_LT(cb->s_ralo, si->si_alo)) {
-			sppstat.spps_rcvwinupd++;
-			sppstat.spps_rcvdupack--;
-		}
-		cb->s_ralo = si->si_alo;
-		cb->s_swl1 = si->si_seq;
-		cb->s_swl2 = si->si_ack;
-		cb->s_swnd = (1 + si->si_alo - si->si_ack);
-		if (cb->s_swnd > cb->s_smxw)
-			cb->s_smxw = cb->s_swnd;
-		cb->s_flags |= SF_WIN;
-	}
-	/*
-	 * If this packet number is higher than that which
-	 * we have allocated refuse it, unless urgent
-	 */
-	if (SSEQ_GT(si->si_seq, cb->s_alo)) {
-		if (si->si_cc & SP_SP) {
-			sppstat.spps_rcvwinprobe++;
-			return (1);
-		} else
-			sppstat.spps_rcvpackafterwin++;
-		if (si->si_cc & SP_OB) {
-			if (SSEQ_GT(si->si_seq, cb->s_alo + 60)) {
-				ns_error(dtom(si), NS_ERR_FULLUP, 0);
-				return (0);
-			} /* else queue this packet; */
-		} else {
-			/*register struct socket *so = cb->s_nspcb->nsp_socket;
-			if (so->so_state & SS_NOFDREF) {
-				ns_error(dtom(si), NS_ERR_NOSOCK, 0);
-				(void)spp_close(cb);
-			} else
-				       would crash system*/
-			spp_istat.notyet++;
-			ns_error(dtom(si), NS_ERR_FULLUP, 0);
-			return (0);
-		}
-	}
-	/*
-	 * If this is a system packet, we don't need to
-	 * queue it up, and won't update acknowledge #
-	 */
-	if (si->si_cc & SP_SP) {
-		return (1);
-	}
-	/*
-	 * We have already seen this packet, so drop.
-	 */
-	if (SSEQ_LT(si->si_seq, cb->s_ack)) {
-		spp_istat.bdreas++;
-		sppstat.spps_rcvduppack++;
-		if (si->si_seq == cb->s_ack - 1)
-			spp_istat.lstdup++;
-		return (1);
-	}
-	/*
-	 * Loop through all packets queued up to insert in
-	 * appropriate sequence.
-	 */
-	for (q = cb->s_q.si_next; q!=&cb->s_q; q = q->si_next) {
-		if (si->si_seq == SI(q)->si_seq) {
-			sppstat.spps_rcvduppack++;
-			return (1);
-		}
-		if (SSEQ_LT(si->si_seq, SI(q)->si_seq)) {
-			sppstat.spps_rcvoopack++;
-			break;
-		}
-	}
-	insque(si, q->si_prev);
-	/*
-	 * If this packet is urgent, inform process
-	 */
-	if (si->si_cc & SP_OB) {
-		cb->s_iobc = ((char *)si)[1 + sizeof(*si)];
-		sohasoutofband(so);
-		cb->s_oobflags |= SF_IOOB;
-	}
-present:
-#define SPINC sizeof(struct sphdr)
-	/*
-	 * Loop through all packets queued up to update acknowledge
-	 * number, and present all acknowledged data to user;
-	 * If in packet interface mode, show packet headers.
-	 */
-	for (q = cb->s_q.si_next; q!=&cb->s_q; q = q->si_next) {
-		  if (SI(q)->si_seq == cb->s_ack) {
-			cb->s_ack++;
-			m = dtom(q);
-			if (SI(q)->si_cc & SP_OB) {
-				cb->s_oobflags &= ~SF_IOOB;
-				if (so->so_rcv.sb_cc)
-					so->so_oobmark = so->so_rcv.sb_cc;
-				else
-					so->so_state |= SS_RCVATMARK;
-			}
-			q = q->si_prev;
-			remque(q->si_next);
-			wakeup = 1;
-			sppstat.spps_rcvpack++;
-#ifdef SF_NEWCALL
-			if (cb->s_flags2 & SF_NEWCALL) {
-				struct sphdr *sp = mtod(m, struct sphdr *);
-				u_char dt = sp->sp_dt;
-				spp_newchecks[4]++;
-				if (dt != cb->s_rhdr.sp_dt) {
-					struct mbuf *mm =
-					   m_getclr(M_DONTWAIT, MT_CONTROL);
-					spp_newchecks[0]++;
-					if (mm != NULL) {
-						u_short *s =
-							mtod(mm, u_short *);
-						cb->s_rhdr.sp_dt = dt;
-						mm->m_len = 5; /*XXX*/
-						s[0] = 5;
-						s[1] = 1;
-						*(u_char *)(&s[2]) = dt;
-						sbappend(&so->so_rcv, mm);
-					}
-				}
-				if (sp->sp_cc & SP_OB) {
-					MCHTYPE(m, MT_OOBDATA);
-					spp_newchecks[1]++;
-					so->so_oobmark = 0;
-					so->so_state &= ~SS_RCVATMARK;
-				}
-				if (packetp == 0) {
-					m->m_data += SPINC;
-					m->m_len -= SPINC;
-					m->m_pkthdr.len -= SPINC;
-				}
-				if ((sp->sp_cc & SP_EM) || packetp) {
-					sbappendrecord(&so->so_rcv, m);
-					spp_newchecks[9]++;
-				} else
-					sbappend(&so->so_rcv, m);
-			} else
-#endif
-			if (packetp) {
-				sbappendrecord(&so->so_rcv, m);
-			} else {
-				cb->s_rhdr = *mtod(m, struct sphdr *);
-				m->m_data += SPINC;
-				m->m_len -= SPINC;
-				m->m_pkthdr.len -= SPINC;
-				sbappend(&so->so_rcv, m);
-			}
-		  } else
-			break;
-	}
-	if (wakeup) sorwakeup(so);
-	return (0);
-}
-
-spp_ctlinput(cmd, arg)
-	int cmd;
-	caddr_t arg;
-{
-	struct ns_addr *na;
-	extern u_char nsctlerrmap[];
-	extern spp_abort(), spp_quench();
-	extern struct nspcb *idp_drop();
-	struct ns_errp *errp;
-	struct nspcb *nsp;
-	struct sockaddr_ns *sns;
-	int type;
-
-	if (cmd < 0 || cmd > PRC_NCMDS)
-		return;
-	type = NS_ERR_UNREACH_HOST;
-
-	switch (cmd) {
-
-	case PRC_ROUTEDEAD:
-		return;
-
-	case PRC_IFDOWN:
-	case PRC_HOSTDEAD:
-	case PRC_HOSTUNREACH:
-		sns = (struct sockaddr_ns *)arg;
-		if (sns->sns_family != AF_NS)
-			return;
-		na = &sns->sns_addr;
-		break;
-
-	default:
-		errp = (struct ns_errp *)arg;
-		na = &errp->ns_err_idp.idp_dna;
-		type = errp->ns_err_num;
-		type = ntohs((u_short)type);
-	}
-	switch (type) {
-
-	case NS_ERR_UNREACH_HOST:
-		ns_pcbnotify(na, (int)nsctlerrmap[cmd], spp_abort, (long) 0);
-		break;
-
-	case NS_ERR_TOO_BIG:
-	case NS_ERR_NOSOCK:
-		nsp = ns_pcblookup(na, errp->ns_err_idp.idp_sna.x_port,
-			NS_WILDCARD);
-		if (nsp) {
-			if(nsp->nsp_pcb)
-				(void) spp_drop((struct sppcb *)nsp->nsp_pcb,
-						(int)nsctlerrmap[cmd]);
-			else
-				(void) idp_drop(nsp, (int)nsctlerrmap[cmd]);
-		}
-		break;
-
-	case NS_ERR_FULLUP:
-		ns_pcbnotify(na, 0, spp_quench, (long) 0);
-	}
-}
-/*
- * When a source quench is received, close congestion window
- * to one packet.  We will gradually open it again as we proceed.
- */
-spp_quench(nsp)
-	struct nspcb *nsp;
-{
-	struct sppcb *cb = nstosppcb(nsp);
-
-	if (cb)
-		cb->s_cwnd = CUNIT;
-}
-
-#ifdef notdef
-int
-spp_fixmtu(nsp)
-register struct nspcb *nsp;
-{
-	register struct sppcb *cb = (struct sppcb *)(nsp->nsp_pcb);
-	register struct mbuf *m;
-	register struct spidp *si;
-	struct ns_errp *ep;
-	struct sockbuf *sb;
-	int badseq, len;
-	struct mbuf *firstbad, *m0;
-
-	if (cb) {
-		/*
-		 * The notification that we have sent
-		 * too much is bad news -- we will
-		 * have to go through queued up so far
-		 * splitting ones which are too big and
-		 * reassigning sequence numbers and checksums.
-		 * we should then retransmit all packets from
-		 * one above the offending packet to the last one
-		 * we had sent (or our allocation)
-		 * then the offending one so that the any queued
-		 * data at our destination will be discarded.
-		 */
-		 ep = (struct ns_errp *)nsp->nsp_notify_param;
-		 sb = &nsp->nsp_socket->so_snd;
-		 cb->s_mtu = ep->ns_err_param;
-		 badseq = SI(&ep->ns_err_idp)->si_seq;
-		 for (m = sb->sb_mb; m; m = m->m_act) {
-			si = mtod(m, struct spidp *);
-			if (si->si_seq == badseq)
-				break;
-		 }
-		 if (m == 0) return;
-		 firstbad = m;
-		 /*for (;;) {*/
-			/* calculate length */
-			len = m_length(m, NULL);
-			if (len > cb->s_mtu) {
-			}
-		/* FINISH THIS
-		} */
-	}
-}
-#endif
-
-spp_output(cb, m0)
-	register struct sppcb *cb;
-	struct mbuf *m0;
-{
-	struct socket *so = cb->s_nspcb->nsp_socket;
-	register struct mbuf *m;
-	register struct spidp *si = (struct spidp *) 0;
-	register struct sockbuf *sb = &so->so_snd;
-	int len = 0, win, rcv_win;
-	short span, off, recordp = 0;
-	u_short alo;
-	int error = 0, sendalot;
-#ifdef notdef
-	int idle;
-#endif
-	struct mbuf *mprev;
-	extern int idpcksum;
-
-	if (m0) {
-		int mtu = cb->s_mtu;
-		int datalen;
-		/*
-		 * Make sure that packet isn't too big.
-		 */
-		for (m = m0; m ; m = m->m_next) {
-			mprev = m;
-			len += m->m_len;
-			if (m->m_flags & M_EOR)
-				recordp = 1;
-		}
-		datalen = (cb->s_flags & SF_HO) ?
-				len - sizeof (struct sphdr) : len;
-		if (datalen > mtu) {
-			if (cb->s_flags & SF_PI) {
-				m_freem(m0);
-				return (EMSGSIZE);
-			} else {
-				int oldEM = cb->s_cc & SP_EM;
-
-				cb->s_cc &= ~SP_EM;
-				while (len > mtu) {
-					/*
-					 * Here we are only being called
-					 * from usrreq(), so it is OK to
-					 * block.
-					 */
-					m = m_copym(m0, 0, mtu, M_TRYWAIT);
-					if (cb->s_flags & SF_NEWCALL) {
-					    struct mbuf *mm = m;
-					    spp_newchecks[7]++;
-					    while (mm) {
-						mm->m_flags &= ~M_EOR;
-						mm = mm->m_next;
-					    }
-					}
-					error = spp_output(cb, m);
-					if (error) {
-						cb->s_cc |= oldEM;
-						m_freem(m0);
-						return(error);
-					}
-					m_adj(m0, mtu);
-					len -= mtu;
-				}
-				cb->s_cc |= oldEM;
-			}
-		}
-		/*
-		 * Force length even, by adding a "garbage byte" if
-		 * necessary.
-		 */
-		if (len & 1) {
-			m = mprev;
-			if (M_TRAILINGSPACE(m) >= 1)
-				m->m_len++;
-			else {
-				struct mbuf *m1 = m_get(M_DONTWAIT, MT_DATA);
-
-				if (m1 == 0) {
-					m_freem(m0);
-					return (ENOBUFS);
-				}
-				m1->m_len = 1;
-				*(mtod(m1, u_char *)) = 0;
-				m->m_next = m1;
-			}
-		}
-		m = m_gethdr(M_DONTWAIT, MT_HEADER);
-		if (m == 0) {
-			m_freem(m0);
-			return (ENOBUFS);
-		}
-		/*
-		 * Fill in mbuf with extended SP header
-		 * and addresses and length put into network format.
-		 */
-		MH_ALIGN(m, sizeof (struct spidp));
-		m->m_len = sizeof (struct spidp);
-		m->m_next = m0;
-		si = mtod(m, struct spidp *);
-		si->si_i = *cb->s_idp;
-		si->si_s = cb->s_shdr;
-		if ((cb->s_flags & SF_PI) && (cb->s_flags & SF_HO)) {
-			register struct sphdr *sh;
-			if (m0->m_len < sizeof (*sh)) {
-				if((m0 = m_pullup(m0, sizeof(*sh))) == NULL) {
-					(void) m_free(m);
-					m_freem(m0);
-					return (EINVAL);
-				}
-				m->m_next = m0;
-			}
-			sh = mtod(m0, struct sphdr *);
-			si->si_dt = sh->sp_dt;
-			si->si_cc |= sh->sp_cc & SP_EM;
-			m0->m_len -= sizeof (*sh);
-			m0->m_data += sizeof (*sh);
-			len -= sizeof (*sh);
-		}
-		len += sizeof(*si);
-		if ((cb->s_flags2 & SF_NEWCALL) && recordp) {
-			si->si_cc  |= SP_EM;
-			spp_newchecks[8]++;
-		}
-		if (cb->s_oobflags & SF_SOOB) {
-			/*
-			 * Per jqj@cornell:
-			 * make sure OB packets convey exactly 1 byte.
-			 * If the packet is 1 byte or larger, we
-			 * have already guaranted there to be at least
-			 * one garbage byte for the checksum, and
-			 * extra bytes shouldn't hurt!
-			 */
-			if (len > sizeof(*si)) {
-				si->si_cc |= SP_OB;
-				len = (1 + sizeof(*si));
-			}
-		}
-		si->si_len = htons((u_short)len);
-		m->m_pkthdr.len = ((len - 1) | 1) + 1;
-		/*
-		 * queue stuff up for output
-		 */
-		sbappendrecord(sb, m);
-		cb->s_seq++;
-	}
-#ifdef notdef
-	idle = (cb->s_smax == (cb->s_rack - 1));
-#endif
-again:
-	sendalot = 0;
-	off = cb->s_snxt - cb->s_rack;
-	win = min(cb->s_swnd, (cb->s_cwnd/CUNIT));
-
-	/*
-	 * If in persist timeout with window of 0, send a probe.
-	 * Otherwise, if window is small but nonzero
-	 * and timer expired, send what we can and go into
-	 * transmit state.
-	 */
-	if (cb->s_force == 1 + SPPT_PERSIST) {
-		if (win != 0) {
-			cb->s_timer[SPPT_PERSIST] = 0;
-			cb->s_rxtshift = 0;
-		}
-	}
-	span = cb->s_seq - cb->s_rack;
-	len = min(span, win) - off;
-
-	if (len < 0) {
-		/*
-		 * Window shrank after we went into it.
-		 * If window shrank to 0, cancel pending
-		 * restransmission and pull s_snxt back
-		 * to (closed) window.  We will enter persist
-		 * state below.  If the widndow didn't close completely,
-		 * just wait for an ACK.
-		 */
-		len = 0;
-		if (win == 0) {
-			cb->s_timer[SPPT_REXMT] = 0;
-			cb->s_snxt = cb->s_rack;
-		}
-	}
-	if (len > 1)
-		sendalot = 1;
-	rcv_win = sbspace(&so->so_rcv);
-
-	/*
-	 * Send if we owe peer an ACK.
-	 */
-	if (cb->s_oobflags & SF_SOOB) {
-		/*
-		 * must transmit this out of band packet
-		 */
-		cb->s_oobflags &= ~ SF_SOOB;
-		sendalot = 1;
-		sppstat.spps_sndurg++;
-		goto found;
-	}
-	if (cb->s_flags & SF_ACKNOW)
-		goto send;
-	if (cb->s_state < TCPS_ESTABLISHED)
-		goto send;
-	/*
-	 * Silly window can't happen in spp.
-	 * Code from tcp deleted.
-	 */
-	if (len)
-		goto send;
-	/*
-	 * Compare available window to amount of window
-	 * known to peer (as advertised window less
-	 * next expected input.)  If the difference is at least two
-	 * packets or at least 35% of the mximum possible window,
-	 * then want to send a window update to peer.
-	 */
-	if (rcv_win > 0) {
-		u_short delta =  1 + cb->s_alo - cb->s_ack;
-		int adv = rcv_win - (delta * cb->s_mtu);
-
-		if ((so->so_rcv.sb_cc == 0 && adv >= (2 * cb->s_mtu)) ||
-		    (100 * adv / so->so_rcv.sb_hiwat >= 35)) {
-			sppstat.spps_sndwinup++;
-			cb->s_flags |= SF_ACKNOW;
-			goto send;
-		}
-
-	}
-	/*
-	 * Many comments from tcp_output.c are appropriate here
-	 * including . . .
-	 * If send window is too small, there is data to transmit, and no
-	 * retransmit or persist is pending, then go to persist state.
-	 * If nothing happens soon, send when timer expires:
-	 * if window is nonzero, transmit what we can,
-	 * otherwise send a probe.
-	 */
-	if (so->so_snd.sb_cc && cb->s_timer[SPPT_REXMT] == 0 &&
-		cb->s_timer[SPPT_PERSIST] == 0) {
-			cb->s_rxtshift = 0;
-			spp_setpersist(cb);
-	}
-	/*
-	 * No reason to send a packet, just return.
-	 */
-	cb->s_outx = 1;
-	return (0);
-
-send:
-	/*
-	 * Find requested packet.
-	 */
-	si = 0;
-	if (len > 0) {
-		cb->s_want = cb->s_snxt;
-		for (m = sb->sb_mb; m; m = m->m_act) {
-			si = mtod(m, struct spidp *);
-			if (SSEQ_LEQ(cb->s_snxt, si->si_seq))
-				break;
-		}
-	found:
-		if (si) {
-			if (si->si_seq == cb->s_snxt)
-					cb->s_snxt++;
-				else
-					sppstat.spps_sndvoid++, si = 0;
-		}
-	}
-	/*
-	 * update window
-	 */
-	if (rcv_win < 0)
-		rcv_win = 0;
-	alo = cb->s_ack - 1 + (rcv_win / ((short)cb->s_mtu));
-	if (SSEQ_LT(alo, cb->s_alo))
-		alo = cb->s_alo;
-
-	if (si) {
-		/*
-		 * must make a copy of this packet for
-		 * idp_output to monkey with
-		 */
-		m = m_copy(dtom(si), 0, (int)M_COPYALL);
-		if (m == NULL) {
-			return (ENOBUFS);
-		}
-		si = mtod(m, struct spidp *);
-		if (SSEQ_LT(si->si_seq, cb->s_smax))
-			sppstat.spps_sndrexmitpack++;
-		else
-			sppstat.spps_sndpack++;
-	} else if (cb->s_force || cb->s_flags & SF_ACKNOW) {
-		/*
-		 * Must send an acknowledgement or a probe
-		 */
-		if (cb->s_force)
-			sppstat.spps_sndprobe++;
-		if (cb->s_flags & SF_ACKNOW)
-			sppstat.spps_sndacks++;
-		m = m_gethdr(M_DONTWAIT, MT_HEADER);
-		if (m == 0)
-			return (ENOBUFS);
-		/*
-		 * Fill in mbuf with extended SP header
-		 * and addresses and length put into network format.
-		 */
-		MH_ALIGN(m, sizeof (struct spidp));
-		m->m_len = sizeof (*si);
-		m->m_pkthdr.len = sizeof (*si);
-		si = mtod(m, struct spidp *);
-		si->si_i = *cb->s_idp;
-		si->si_s = cb->s_shdr;
-		si->si_seq = cb->s_smax + 1;
-		si->si_len = htons(sizeof (*si));
-		si->si_cc |= SP_SP;
-	} else {
-		cb->s_outx = 3;
-		if (so->so_options & SO_DEBUG || traceallspps)
-			spp_trace(SA_OUTPUT, cb->s_state, cb, si, 0);
-		return (0);
-	}
-	/*
-	 * Stuff checksum and output datagram.
-	 */
-	if ((si->si_cc & SP_SP) == 0) {
-		if (cb->s_force != (1 + SPPT_PERSIST) ||
-		    cb->s_timer[SPPT_PERSIST] == 0) {
-			/*
-			 * If this is a new packet and we are not currently
-			 * timing anything, time this one.
-			 */
-			if (SSEQ_LT(cb->s_smax, si->si_seq)) {
-				cb->s_smax = si->si_seq;
-				if (cb->s_rtt == 0) {
-					sppstat.spps_segstimed++;
-					cb->s_rtseq = si->si_seq;
-					cb->s_rtt = 1;
-				}
-			}
-			/*
-			 * Set rexmt timer if not currently set,
-			 * Initial value for retransmit timer is smoothed
-			 * round-trip time + 2 * round-trip time variance.
-			 * Initialize shift counter which is used for backoff
-			 * of retransmit time.
-			 */
-			if (cb->s_timer[SPPT_REXMT] == 0 &&
-			    cb->s_snxt != cb->s_rack) {
-				cb->s_timer[SPPT_REXMT] = cb->s_rxtcur;
-				if (cb->s_timer[SPPT_PERSIST]) {
-					cb->s_timer[SPPT_PERSIST] = 0;
-					cb->s_rxtshift = 0;
-				}
-			}
-		} else if (SSEQ_LT(cb->s_smax, si->si_seq)) {
-			cb->s_smax = si->si_seq;
-		}
-	} else if (cb->s_state < TCPS_ESTABLISHED) {
-		if (cb->s_rtt == 0)
-			cb->s_rtt = 1; /* Time initial handshake */
-		if (cb->s_timer[SPPT_REXMT] == 0)
-			cb->s_timer[SPPT_REXMT] = cb->s_rxtcur;
-	}
-	{
-		/*
-		 * Do not request acks when we ack their data packets or
-		 * when we do a gratuitous window update.
-		 */
-		if (((si->si_cc & SP_SP) == 0) || cb->s_force)
-				si->si_cc |= SP_SA;
-		si->si_seq = htons(si->si_seq);
-		si->si_alo = htons(alo);
-		si->si_ack = htons(cb->s_ack);
-
-		if (idpcksum) {
-			si->si_sum = 0;
-			len = ntohs(si->si_len);
-			if (len & 1)
-				len++;
-			si->si_sum = ns_cksum(m, len);
-		} else
-			si->si_sum = 0xffff;
-
-		cb->s_outx = 4;
-		if (so->so_options & SO_DEBUG || traceallspps)
-			spp_trace(SA_OUTPUT, cb->s_state, cb, si, 0);
-
-		if (so->so_options & SO_DONTROUTE)
-			error = ns_output(m, (struct route *)0, NS_ROUTETOIF);
-		else
-			error = ns_output(m, &cb->s_nspcb->nsp_route, 0);
-	}
-	if (error) {
-		return (error);
-	}
-	sppstat.spps_sndtotal++;
-	/*
-	 * Data sent (as far as we can tell).
-	 * If this advertises a larger window than any other segment,
-	 * then remember the size of the advertized window.
-	 * Any pending ACK has now been sent.
-	 */
-	cb->s_force = 0;
-	cb->s_flags &= ~(SF_ACKNOW|SF_DELACK);
-	if (SSEQ_GT(alo, cb->s_alo))
-		cb->s_alo = alo;
-	if (sendalot)
-		goto again;
-	cb->s_outx = 5;
-	return (0);
-}
-
-int spp_do_persist_panics = 0;
-
-spp_setpersist(cb)
-	register struct sppcb *cb;
-{
-	register t = ((cb->s_srtt >> 2) + cb->s_rttvar) >> 1;
-	extern int spp_backoff[];
-
-	if (cb->s_timer[SPPT_REXMT] && spp_do_persist_panics)
-		panic("spp_output REXMT");
-	/*
-	 * Start/restart persistance timer.
-	 */
-	SPPT_RANGESET(cb->s_timer[SPPT_PERSIST],
-	    t*spp_backoff[cb->s_rxtshift],
-	    SPPTV_PERSMIN, SPPTV_PERSMAX);
-	if (cb->s_rxtshift < SPP_MAXRXTSHIFT)
-		cb->s_rxtshift++;
-}
-/*ARGSUSED*/
-spp_ctloutput(req, so, level, name, value)
-	int req;
-	struct socket *so;
-	int name;
-	struct mbuf **value;
-{
-	register struct mbuf *m;
-	struct nspcb *nsp = sotonspcb(so);
-	register struct sppcb *cb;
-	int mask, error = 0;
-
-	if (level != NSPROTO_SPP) {
-		/* This will have to be changed when we do more general
-		   stacking of protocols */
-		return (idp_ctloutput(req, so, level, name, value));
-	}
-	if (nsp == NULL) {
-		error = EINVAL;
-		goto release;
-	} else
-		cb = nstosppcb(nsp);
-
-	switch (req) {
-
-	case PRCO_GETOPT:
-		if (value == NULL)
-			return (EINVAL);
-		m = m_get(M_DONTWAIT, MT_DATA);
-		if (m == NULL)
-			return (ENOBUFS);
-		switch (name) {
-
-		case SO_HEADERS_ON_INPUT:
-			mask = SF_HI;
-			goto get_flags;
-
-		case SO_HEADERS_ON_OUTPUT:
-			mask = SF_HO;
-		get_flags:
-			m->m_len = sizeof(short);
-			*mtod(m, short *) = cb->s_flags & mask;
-			break;
-
-		case SO_MTU:
-			m->m_len = sizeof(u_short);
-			*mtod(m, short *) = cb->s_mtu;
-			break;
-
-		case SO_LAST_HEADER:
-			m->m_len = sizeof(struct sphdr);
-			*mtod(m, struct sphdr *) = cb->s_rhdr;
-			break;
-
-		case SO_DEFAULT_HEADERS:
-			m->m_len = sizeof(struct spidp);
-			*mtod(m, struct sphdr *) = cb->s_shdr;
-			break;
-
-		default:
-			error = EINVAL;
-		}
-		*value = m;
-		break;
-
-	case PRCO_SETOPT:
-		if (value == 0 || *value == 0) {
-			error = EINVAL;
-			break;
-		}
-		switch (name) {
-			int *ok;
-
-		case SO_HEADERS_ON_INPUT:
-			mask = SF_HI;
-			goto set_head;
-
-		case SO_HEADERS_ON_OUTPUT:
-			mask = SF_HO;
-		set_head:
-			if (cb->s_flags & SF_PI) {
-				ok = mtod(*value, int *);
-				if (*ok)
-					cb->s_flags |= mask;
-				else
-					cb->s_flags &= ~mask;
-			} else error = EINVAL;
-			break;
-
-		case SO_MTU:
-			cb->s_mtu = *(mtod(*value, u_short *));
-			break;
-
-#ifdef SF_NEWCALL
-		case SO_NEWCALL:
-			ok = mtod(*value, int *);
-			if (*ok) {
-				cb->s_flags2 |= SF_NEWCALL;
-				spp_newchecks[5]++;
-			} else {
-				cb->s_flags2 &= ~SF_NEWCALL;
-				spp_newchecks[6]++;
-			}
-			break;
-#endif
-
-		case SO_DEFAULT_HEADERS:
-			{
-				register struct sphdr *sp
-						= mtod(*value, struct sphdr *);
-				cb->s_dt = sp->sp_dt;
-				cb->s_cc = sp->sp_cc & SP_EM;
-			}
-			break;
-
-		default:
-			error = EINVAL;
-		}
-		m_freem(*value);
-		break;
-	}
-	release:
-		return (error);
-}
-
-/*ARGSUSED*/
-spp_usrreq(so, req, m, nam, controlp)
-	struct socket *so;
-	int req;
-	struct mbuf *m, *nam, *controlp;
-{
-	struct nspcb *nsp = sotonspcb(so);
-	register struct sppcb *cb;
-	int s = splnet();
-	int error = 0, ostate;
-	struct mbuf *mm;
-	register struct sockbuf *sb;
-
-	if (req == PRU_CONTROL)
-                return (ns_control(so, (int)m, (caddr_t)nam,
-			(struct ifnet *)controlp));
-	if (nsp == NULL) {
-		if (req != PRU_ATTACH) {
-			error = EINVAL;
-			goto release;
-		}
-	} else
-		cb = nstosppcb(nsp);
-
-	ostate = cb ? cb->s_state : 0;
-
-	switch (req) {
-
-	case PRU_ATTACH:
-		if (nsp != NULL) {
-			error = EISCONN;
-			break;
-		}
-		error = ns_pcballoc(so, &nspcb);
-		if (error)
-			break;
-		if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
-			error = soreserve(so, (u_long) 3072, (u_long) 3072);
-			if (error)
-				break;
-		}
-		nsp = sotonspcb(so);
-
-		mm = m_getclr(M_DONTWAIT, MT_PCB);
-		sb = &so->so_snd;
-
-		if (mm == NULL) {
-			error = ENOBUFS;
-			break;
-		}
-		cb = mtod(mm, struct sppcb *);
-		mm = m_getclr(M_DONTWAIT, MT_HEADER);
-		if (mm == NULL) {
-			(void) m_free(dtom(m));
-			error = ENOBUFS;
-			break;
-		}
-		cb->s_idp = mtod(mm, struct idp *);
-		cb->s_state = TCPS_LISTEN;
-		cb->s_smax = -1;
-		cb->s_swl1 = -1;
-		cb->s_q.si_next = cb->s_q.si_prev = &cb->s_q;
-		cb->s_nspcb = nsp;
-		cb->s_mtu = 576 - sizeof (struct spidp);
-		cb->s_cwnd = sbspace(sb) * CUNIT / cb->s_mtu;
-		cb->s_ssthresh = cb->s_cwnd;
-		cb->s_cwmx = sbspace(sb) * CUNIT /
-				(2 * sizeof (struct spidp));
-		/* Above is recomputed when connecting to account
-		   for changed buffering or mtu's */
-		cb->s_rtt = SPPTV_SRTTBASE;
-		cb->s_rttvar = SPPTV_SRTTDFLT << 2;
-		SPPT_RANGESET(cb->s_rxtcur,
-		    ((SPPTV_SRTTBASE >> 2) + (SPPTV_SRTTDFLT << 2)) >> 1,
-		    SPPTV_MIN, SPPTV_REXMTMAX);
-		nsp->nsp_pcb = (caddr_t) cb;
-		break;
-
-	case PRU_DETACH:
-		if (nsp == NULL) {
-			error = ENOTCONN;
-			break;
-		}
-		if (cb->s_state > TCPS_LISTEN)
-			cb = spp_disconnect(cb);
-		else
-			cb = spp_close(cb);
-		break;
-
-	case PRU_BIND:
-		error = ns_pcbbind(nsp, nam);
-		break;
-
-	case PRU_LISTEN:
-		if (nsp->nsp_lport == 0)
-			error = ns_pcbbind(nsp, (struct mbuf *)0);
-		if (error == 0)
-			cb->s_state = TCPS_LISTEN;
-		break;
-
-	/*
-	 * Initiate connection to peer.
-	 * Enter SYN_SENT state, and mark socket as connecting.
-	 * Start keep-alive timer, setup prototype header,
-	 * Send initial system packet requesting connection.
-	 */
-	case PRU_CONNECT:
-		if (nsp->nsp_lport == 0) {
-			error = ns_pcbbind(nsp, (struct mbuf *)0);
-			if (error)
-				break;
-		}
-		error = ns_pcbconnect(nsp, nam);
-		if (error)
-			break;
-		soisconnecting(so);
-		sppstat.spps_connattempt++;
-		cb->s_state = TCPS_SYN_SENT;
-		cb->s_did = 0;
-		spp_template(cb);
-		cb->s_timer[SPPT_KEEP] = SPPTV_KEEP;
-		cb->s_force = 1 + SPPTV_KEEP;
-		/*
-		 * Other party is required to respond to
-		 * the port I send from, but he is not
-		 * required to answer from where I am sending to,
-		 * so allow wildcarding.
-		 * original port I am sending to is still saved in
-		 * cb->s_dport.
-		 */
-		nsp->nsp_fport = 0;
-		error = spp_output(cb, (struct mbuf *) 0);
-		break;
-
-	case PRU_CONNECT2:
-		error = EOPNOTSUPP;
-		break;
-
-	/*
-	 * We may decide later to implement connection closing
-	 * handshaking at the spp level optionally.
-	 * here is the hook to do it:
-	 */
-	case PRU_DISCONNECT:
-		cb = spp_disconnect(cb);
-		break;
-
-	/*
-	 * Accept a connection.  Essentially all the work is
-	 * done at higher levels; just return the address
-	 * of the peer, storing through addr.
-	 */
-	case PRU_ACCEPT: {
-		struct sockaddr_ns *sns = mtod(nam, struct sockaddr_ns *);
-
-		nam->m_len = sizeof (struct sockaddr_ns);
-		sns->sns_family = AF_NS;
-		sns->sns_addr = nsp->nsp_faddr;
-		break;
-		}
-
-	case PRU_SHUTDOWN:
-		socantsendmore(so);
-		cb = spp_usrclosed(cb);
-		if (cb)
-			error = spp_output(cb, (struct mbuf *) 0);
-		break;
-
-	/*
-	 * After a receive, possibly send acknowledgment
-	 * updating allocation.
-	 */
-	case PRU_RCVD:
-		cb->s_flags |= SF_RVD;
-		(void) spp_output(cb, (struct mbuf *) 0);
-		cb->s_flags &= ~SF_RVD;
-		break;
-
-	case PRU_ABORT:
-		(void) spp_drop(cb, ECONNABORTED);
-		break;
-
-	case PRU_SENSE:
-	case PRU_CONTROL:
-		m = NULL;
-		error = EOPNOTSUPP;
-		break;
-
-	case PRU_RCVOOB:
-		if ((cb->s_oobflags & SF_IOOB) || so->so_oobmark ||
-		    (so->so_state & SS_RCVATMARK)) {
-			m->m_len = 1;
-			*mtod(m, caddr_t) = cb->s_iobc;
-			break;
-		}
-		error = EINVAL;
-		break;
-
-	case PRU_SENDOOB:
-		if (sbspace(&so->so_snd) < -512) {
-			error = ENOBUFS;
-			break;
-		}
-		cb->s_oobflags |= SF_SOOB;
-		/* FALLTHROUGH */
-	case PRU_SEND:
-		if (controlp) {
-			u_short *p = mtod(controlp, u_short *);
-			spp_newchecks[2]++;
-			if ((p[0] == 5) && p[1] == 1) { /* XXXX, for testing */
-				cb->s_shdr.sp_dt = *(u_char *)(&p[2]);
-				spp_newchecks[3]++;
-			}
-			m_freem(controlp);
-		}
-		controlp = NULL;
-		error = spp_output(cb, m);
-		m = NULL;
-		break;
-
-	case PRU_SOCKADDR:
-		ns_setsockaddr(nsp, nam);
-		break;
-
-	case PRU_PEERADDR:
-		ns_setpeeraddr(nsp, nam);
-		break;
-
-	case PRU_SLOWTIMO:
-		cb = spp_timers(cb, (int)nam);
-		req |= ((int)nam) << 8;
-		break;
-
-	case PRU_FASTTIMO:
-	case PRU_PROTORCV:
-	case PRU_PROTOSEND:
-		error =  EOPNOTSUPP;
-		break;
-
-	default:
-		panic("sp_usrreq");
-	}
-	if (cb && (so->so_options & SO_DEBUG || traceallspps))
-		spp_trace(SA_USER, (u_char)ostate, cb, (struct spidp *)0, req);
-release:
-	if (controlp != NULL)
-		m_freem(controlp);
-	if (m != NULL)
-		m_freem(m);
-	splx(s);
-	return (error);
-}
-
-spp_usrreq_sp(so, req, m, nam, controlp)
-	struct socket *so;
-	int req;
-	struct mbuf *m, *nam, *controlp;
-{
-	int error = spp_usrreq(so, req, m, nam, controlp);
-
-	if (req == PRU_ATTACH && error == 0) {
-		struct nspcb *nsp = sotonspcb(so);
-		((struct sppcb *)nsp->nsp_pcb)->s_flags |=
-					(SF_HI | SF_HO | SF_PI);
-	}
-	return (error);
-}
-
-/*
- * Create template to be used to send spp packets on a connection.
- * Called after host entry created, fills
- * in a skeletal spp header (choosing connection id),
- * minimizing the amount of work necessary when the connection is used.
- */
-spp_template(cb)
-	register struct sppcb *cb;
-{
-	register struct nspcb *nsp = cb->s_nspcb;
-	register struct idp *idp = cb->s_idp;
-	register struct sockbuf *sb = &(nsp->nsp_socket->so_snd);
-
-	idp->idp_pt = NSPROTO_SPP;
-	idp->idp_sna = nsp->nsp_laddr;
-	idp->idp_dna = nsp->nsp_faddr;
-	cb->s_sid = htons(spp_iss);
-	spp_iss += SPP_ISSINCR/2;
-	cb->s_alo = 1;
-	cb->s_cwnd = (sbspace(sb) * CUNIT) / cb->s_mtu;
-	cb->s_ssthresh = cb->s_cwnd; /* Try to expand fast to full complement
-					of large packets */
-	cb->s_cwmx = (sbspace(sb) * CUNIT) / (2 * sizeof(struct spidp));
-	cb->s_cwmx = max(cb->s_cwmx, cb->s_cwnd);
-		/* But allow for lots of little packets as well */
-}
-
-/*
- * Close a SPIP control block:
- *	discard spp control block itself
- *	discard ns protocol control block
- *	wake up any sleepers
- */
-struct sppcb *
-spp_close(cb)
-	register struct sppcb *cb;
-{
-	register struct spidp_q *s;
-	struct nspcb *nsp = cb->s_nspcb;
-	struct socket *so = nsp->nsp_socket;
-	register struct mbuf *m;
-
-	s = cb->s_q.si_next;
-	while (s != &(cb->s_q)) {
-		s = s->si_next;
-		m = dtom(s->si_prev);
-		remque(s->si_prev);
-		m_freem(m);
-	}
-	(void) m_free(dtom(cb->s_idp));
-	(void) m_free(dtom(cb));
-	nsp->nsp_pcb = 0;
-	soisdisconnected(so);
-	ns_pcbdetach(nsp);
-	sppstat.spps_closed++;
-	return ((struct sppcb *)0);
-}
-/*
- *	Someday we may do level 3 handshaking
- *	to close a connection or send a xerox style error.
- *	For now, just close.
- */
-struct sppcb *
-spp_usrclosed(cb)
-	register struct sppcb *cb;
-{
-	return (spp_close(cb));
-}
-struct sppcb *
-spp_disconnect(cb)
-	register struct sppcb *cb;
-{
-	return (spp_close(cb));
-}
-/*
- * Drop connection, reporting
- * the specified error.
- */
-struct sppcb *
-spp_drop(cb, errno)
-	register struct sppcb *cb;
-	int errno;
-{
-	struct socket *so = cb->s_nspcb->nsp_socket;
-
-	/*
-	 * someday, in the xerox world
-	 * we will generate error protocol packets
-	 * announcing that the socket has gone away.
-	 */
-	if (TCPS_HAVERCVDSYN(cb->s_state)) {
-		sppstat.spps_drops++;
-		cb->s_state = TCPS_CLOSED;
-		/*(void) tcp_output(cb);*/
-	} else
-		sppstat.spps_conndrops++;
-	so->so_error = errno;
-	return (spp_close(cb));
-}
-
-spp_abort(nsp)
-	struct nspcb *nsp;
-{
-
-	(void) spp_close((struct sppcb *)nsp->nsp_pcb);
-}
-
-int	spp_backoff[SPP_MAXRXTSHIFT+1] =
-    { 1, 2, 4, 8, 16, 32, 64, 64, 64, 64, 64, 64, 64 };
-/*
- * Fast timeout routine for processing delayed acks
- */
-spp_fasttimo()
-{
-	register struct nspcb *nsp;
-	register struct sppcb *cb;
-	int s = splnet();
-
-	nsp = nspcb.nsp_next;
-	if (nsp)
-	for (; nsp != &nspcb; nsp = nsp->nsp_next)
-		if ((cb = (struct sppcb *)nsp->nsp_pcb) &&
-		    (cb->s_flags & SF_DELACK)) {
-			cb->s_flags &= ~SF_DELACK;
-			cb->s_flags |= SF_ACKNOW;
-			sppstat.spps_delack++;
-			(void) spp_output(cb, (struct mbuf *) 0);
-		}
-	splx(s);
-}
-
-/*
- * spp protocol timeout routine called every 500 ms.
- * Updates the timers in all active pcb's and
- * causes finite state machine actions if timers expire.
- */
-spp_slowtimo()
-{
-	register struct nspcb *ip, *ipnxt;
-	register struct sppcb *cb;
-	int s = splnet();
-	register int i;
-
-	/*
-	 * Search through tcb's and update active timers.
-	 */
-	ip = nspcb.nsp_next;
-	if (ip == 0) {
-		splx(s);
-		return;
-	}
-	while (ip != &nspcb) {
-		cb = nstosppcb(ip);
-		ipnxt = ip->nsp_next;
-		if (cb == 0)
-			goto tpgone;
-		for (i = 0; i < SPPT_NTIMERS; i++) {
-			if (cb->s_timer[i] && --cb->s_timer[i] == 0) {
-				(void) spp_usrreq(cb->s_nspcb->nsp_socket,
-				    PRU_SLOWTIMO, (struct mbuf *)0,
-				    (struct mbuf *)i, (struct mbuf *)0,
-				    (struct mbuf *)0);
-				if (ipnxt->nsp_prev != ip)
-					goto tpgone;
-			}
-		}
-		cb->s_idle++;
-		if (cb->s_rtt)
-			cb->s_rtt++;
-tpgone:
-		ip = ipnxt;
-	}
-	spp_iss += SPP_ISSINCR/PR_SLOWHZ;		/* increment iss */
-	splx(s);
-}
-/*
- * SPP timer processing.
- */
-struct sppcb *
-spp_timers(cb, timer)
-	register struct sppcb *cb;
-	int timer;
-{
-	long rexmt;
-	int win;
-
-	cb->s_force = 1 + timer;
-	switch (timer) {
-
-	/*
-	 * 2 MSL timeout in shutdown went off.  TCP deletes connection
-	 * control block.
-	 */
-	case SPPT_2MSL:
-		printf("spp: SPPT_2MSL went off for no reason\n");
-		cb->s_timer[timer] = 0;
-		break;
-
-	/*
-	 * Retransmission timer went off.  Message has not
-	 * been acked within retransmit interval.  Back off
-	 * to a longer retransmit interval and retransmit one packet.
-	 */
-	case SPPT_REXMT:
-		if (++cb->s_rxtshift > SPP_MAXRXTSHIFT) {
-			cb->s_rxtshift = SPP_MAXRXTSHIFT;
-			sppstat.spps_timeoutdrop++;
-			cb = spp_drop(cb, ETIMEDOUT);
-			break;
-		}
-		sppstat.spps_rexmttimeo++;
-		rexmt = ((cb->s_srtt >> 2) + cb->s_rttvar) >> 1;
-		rexmt *= spp_backoff[cb->s_rxtshift];
-		SPPT_RANGESET(cb->s_rxtcur, rexmt, SPPTV_MIN, SPPTV_REXMTMAX);
-		cb->s_timer[SPPT_REXMT] = cb->s_rxtcur;
-		/*
-		 * If we have backed off fairly far, our srtt
-		 * estimate is probably bogus.  Clobber it
-		 * so we'll take the next rtt measurement as our srtt;
-		 * move the current srtt into rttvar to keep the current
-		 * retransmit times until then.
-		 */
-		if (cb->s_rxtshift > SPP_MAXRXTSHIFT / 4 ) {
-			cb->s_rttvar += (cb->s_srtt >> 2);
-			cb->s_srtt = 0;
-		}
-		cb->s_snxt = cb->s_rack;
-		/*
-		 * If timing a packet, stop the timer.
-		 */
-		cb->s_rtt = 0;
-		/*
-		 * See very long discussion in tcp_timer.c about congestion
-		 * window and sstrhesh
-		 */
-		win = min(cb->s_swnd, (cb->s_cwnd/CUNIT)) / 2;
-		if (win < 2)
-			win = 2;
-		cb->s_cwnd = CUNIT;
-		cb->s_ssthresh = win * CUNIT;
-		(void) spp_output(cb, (struct mbuf *) 0);
-		break;
-
-	/*
-	 * Persistance timer into zero window.
-	 * Force a probe to be sent.
-	 */
-	case SPPT_PERSIST:
-		sppstat.spps_persisttimeo++;
-		spp_setpersist(cb);
-		(void) spp_output(cb, (struct mbuf *) 0);
-		break;
-
-	/*
-	 * Keep-alive timer went off; send something
-	 * or drop connection if idle for too long.
-	 */
-	case SPPT_KEEP:
-		sppstat.spps_keeptimeo++;
-		if (cb->s_state < TCPS_ESTABLISHED)
-			goto dropit;
-		if (cb->s_nspcb->nsp_socket->so_options & SO_KEEPALIVE) {
-		    	if (cb->s_idle >= SPPTV_MAXIDLE)
-				goto dropit;
-			sppstat.spps_keepprobe++;
-			(void) spp_output(cb, (struct mbuf *) 0);
-		} else
-			cb->s_idle = 0;
-		cb->s_timer[SPPT_KEEP] = SPPTV_KEEP;
-		break;
-	dropit:
-		sppstat.spps_keepdrops++;
-		cb = spp_drop(cb, ETIMEDOUT);
-		break;
-	}
-	return (cb);
-}
-#ifndef lint
-int SppcbSize = sizeof (struct sppcb);
-int NspcbSize = sizeof (struct nspcb);
-#endif /* lint */
diff --git a/sys/netns/spp_var.h b/sys/netns/spp_var.h
deleted file mode 100644
index 2bf0718..0000000
--- a/sys/netns/spp_var.h
+++ /dev/null
@@ -1,221 +0,0 @@
-/*
- * 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.
- *
- *	@(#)spp_var.h	8.1 (Berkeley) 6/10/93
- * $FreeBSD$
- */
-
-#ifndef _NETNS_SPP_VAR_H_
-#define _NETNS_SPP_VAR_H_
-
-/*
- * Sp control block, one per connection
- */
-struct sppcb {
-	struct	spidp_q	s_q;		/* queue for out-of-order receipt */
-	struct	nspcb	*s_nspcb;	/* backpointer to internet pcb */
-	u_char	s_state;
-	u_char	s_flags;
-#define	SF_ACKNOW	0x01		/* Ack peer immediately */
-#define	SF_DELACK	0x02		/* Ack, but try to delay it */
-#define	SF_HI	0x04			/* Show headers on input */
-#define	SF_HO	0x08			/* Show headers on output */
-#define	SF_PI	0x10			/* Packet (datagram) interface */
-#define SF_WIN	0x20			/* Window info changed */
-#define SF_RXT	0x40			/* Rxt info changed */
-#define SF_RVD	0x80			/* Calling from read usrreq routine */
-	u_short s_mtu;			/* Max packet size for this stream */
-/* use sequence fields in headers to store sequence numbers for this
-   connection */
-	struct	idp	*s_idp;
-	struct	sphdr	s_shdr;		/* prototype header to transmit */
-#define s_cc s_shdr.sp_cc		/* connection control (for EM bit) */
-#define s_dt s_shdr.sp_dt		/* datastream type */
-#define s_sid s_shdr.sp_sid		/* source connection identifier */
-#define s_did s_shdr.sp_did		/* destination connection identifier */
-#define s_seq s_shdr.sp_seq		/* sequence number */
-#define s_ack s_shdr.sp_ack		/* acknowledge number */
-#define s_alo s_shdr.sp_alo		/* allocation number */
-#define s_dport s_idp->idp_dna.x_port	/* where we are sending */
-	struct sphdr s_rhdr;		/* last received header (in effect!)*/
-	u_short s_rack;			/* their acknowledge number */
-	u_short s_ralo;			/* their allocation number */
-	u_short s_smax;			/* highest packet # we have sent */
-	u_short	s_snxt;			/* which packet to send next */
-
-/* congestion control */
-#define	CUNIT	1024			/* scaling for ... */
-	int	s_cwnd;			/* Congestion-controlled window */
-					/* in packets * CUNIT */
-	short	s_swnd;			/* == tcp snd_wnd, in packets */
-	short	s_smxw;			/* == tcp max_sndwnd */
-					/* difference of two spp_seq's can be
-					   no bigger than a short */
-	u_short	s_swl1;			/* == tcp snd_wl1 */
-	u_short	s_swl2;			/* == tcp snd_wl2 */
-	int	s_cwmx;			/* max allowable cwnd */
-	int	s_ssthresh;		/* s_cwnd size threshhold for
-					 * slow start exponential-to-
-					 * linear switch */
-/* transmit timing stuff
- * srtt and rttvar are stored as fixed point, for convenience in smoothing.
- * srtt has 3 bits to the right of the binary point, rttvar has 2.
- */
-	short	s_idle;			/* time idle */
-	short	s_timer[SPPT_NTIMERS];	/* timers */
-	short	s_rxtshift;		/* log(2) of rexmt exp. backoff */
-	short	s_rxtcur;		/* current retransmit value */
-	u_short	s_rtseq;		/* packet being timed */
-	short	s_rtt;			/* timer for round trips */
-	short	s_srtt;			/* averaged timer */
-	short	s_rttvar;		/* variance in round trip time */
-	char	s_force;		/* which timer expired */
-	char	s_dupacks;		/* counter to intuit xmt loss */
-
-/* out of band data */
-	char	s_oobflags;
-#define SF_SOOB	0x08			/* sending out of band data */
-#define SF_IOOB 0x10			/* receiving out of band data */
-	char	s_iobc;			/* input characters */
-/* debug stuff */
-	u_short	s_want;			/* Last candidate for sending */
-	char	s_outx;			/* exit taken from spp_output */
-	char	s_inx;			/* exit taken from spp_input */
-	u_short	s_flags2;		/* more flags for testing */
-#define SF_NEWCALL	0x100		/* for new_recvmsg */
-#define SO_NEWCALL	10		/* for new_recvmsg */
-};
-
-#define	nstosppcb(np)	((struct sppcb *)(np)->nsp_pcb)
-#define	sotosppcb(so)	(nstosppcb(sotonspcb(so)))
-
-struct	sppstat {
-	long	spps_connattempt;	/* connections initiated */
-	long	spps_accepts;		/* connections accepted */
-	long	spps_connects;		/* connections established */
-	long	spps_drops;		/* connections dropped */
-	long	spps_conndrops;		/* embryonic connections dropped */
-	long	spps_closed;		/* conn. closed (includes drops) */
-	long	spps_segstimed;		/* segs where we tried to get rtt */
-	long	spps_rttupdated;	/* times we succeeded */
-	long	spps_delack;		/* delayed acks sent */
-	long	spps_timeoutdrop;	/* conn. dropped in rxmt timeout */
-	long	spps_rexmttimeo;	/* retransmit timeouts */
-	long	spps_persisttimeo;	/* persist timeouts */
-	long	spps_keeptimeo;		/* keepalive timeouts */
-	long	spps_keepprobe;		/* keepalive probes sent */
-	long	spps_keepdrops;		/* connections dropped in keepalive */
-
-	long	spps_sndtotal;		/* total packets sent */
-	long	spps_sndpack;		/* data packets sent */
-	long	spps_sndbyte;		/* data bytes sent */
-	long	spps_sndrexmitpack;	/* data packets retransmitted */
-	long	spps_sndrexmitbyte;	/* data bytes retransmitted */
-	long	spps_sndacks;		/* ack-only packets sent */
-	long	spps_sndprobe;		/* window probes sent */
-	long	spps_sndurg;		/* packets sent with URG only */
-	long	spps_sndwinup;		/* window update-only packets sent */
-	long	spps_sndctrl;		/* control (SYN|FIN|RST) packets sent */
-	long	spps_sndvoid;		/* couldn't find requested packet*/
-
-	long	spps_rcvtotal;		/* total packets received */
-	long	spps_rcvpack;		/* packets received in sequence */
-	long	spps_rcvbyte;		/* bytes received in sequence */
-	long	spps_rcvbadsum;		/* packets received with ccksum errs */
-	long	spps_rcvbadoff;		/* packets received with bad offset */
-	long	spps_rcvshort;		/* packets received too short */
-	long	spps_rcvduppack;	/* duplicate-only packets received */
-	long	spps_rcvdupbyte;	/* duplicate-only bytes received */
-	long	spps_rcvpartduppack;	/* packets with some duplicate data */
-	long	spps_rcvpartdupbyte;	/* dup. bytes in part-dup. packets */
-	long	spps_rcvoopack;		/* out-of-order packets received */
-	long	spps_rcvoobyte;		/* out-of-order bytes received */
-	long	spps_rcvpackafterwin;	/* packets with data after window */
-	long	spps_rcvbyteafterwin;	/* bytes rcvd after window */
-	long	spps_rcvafterclose;	/* packets rcvd after "close" */
-	long	spps_rcvwinprobe;	/* rcvd window probe packets */
-	long	spps_rcvdupack;		/* rcvd duplicate acks */
-	long	spps_rcvacktoomuch;	/* rcvd acks for unsent data */
-	long	spps_rcvackpack;	/* rcvd ack packets */
-	long	spps_rcvackbyte;	/* bytes acked by rcvd acks */
-	long	spps_rcvwinupd;		/* rcvd window update packets */
-};
-struct	spp_istat {
-	short	hdrops;
-	short	badsum;
-	short	badlen;
-	short	slotim;
-	short	fastim;
-	short	nonucn;
-	short	noconn;
-	short	notme;
-	short	wrncon;
-	short	bdreas;
-	short	gonawy;
-	short	notyet;
-	short	lstdup;
-	struct sppstat newstats;
-};
-
-#ifdef _KERNEL
-struct spp_istat spp_istat;
-
-/* Following was struct sppstat sppstat; */
-#ifndef sppstat
-#define sppstat spp_istat.newstats
-#endif
-
-u_short spp_iss;
-extern struct sppcb *spp_close(), *spp_disconnect(),
-	*spp_usrclosed(), *spp_timers(), *spp_drop();
-#endif
-
-#define	SPP_ISSINCR	128
-/*
- * SPP sequence numbers are 16 bit integers operated
- * on with modular arithmetic.  These macros can be
- * used to compare such integers.
- */
-#ifdef sun
-short xnsCbug;
-#define	SSEQ_LT(a,b)	((xnsCbug = (short)((a)-(b))) < 0)
-#define	SSEQ_LEQ(a,b)	((xnsCbug = (short)((a)-(b))) <= 0)
-#define	SSEQ_GT(a,b)	((xnsCbug = (short)((a)-(b))) > 0)
-#define	SSEQ_GEQ(a,b)	((xnsCbug = (short)((a)-(b))) >= 0)
-#else
-#define	SSEQ_LT(a,b)	(((short)((a)-(b))) < 0)
-#define	SSEQ_LEQ(a,b)	(((short)((a)-(b))) <= 0)
-#define	SSEQ_GT(a,b)	(((short)((a)-(b))) > 0)
-#define	SSEQ_GEQ(a,b)	(((short)((a)-(b))) >= 0)
-#endif
-
-#endif