Reviewed by: julian and jhay@mikom.csir.co.za

Submitted by:	Mike Mitchell, supervisor@alb.asctmd.com

This is a bulk mport of Mike's IPX/SPX protocol stacks and all the
related gunf that goes with it..
it is not guaranteed to work 100% correctly at this time
but as we had several people trying to work on it
I figured it would be better to get it checked in so
they could all get teh same thing to work on..

Mikes been using it for a year or so
but on 2.0

more changes and stuff will be merged in from other developers now that this is in.

Mike Mitchell, Network Engineer
AMTECH Systems Corporation, Technology and Manufacturing
8600 Jefferson Street, Albuquerque, New Mexico 87113 (505) 856-8000
supervisor@alb.asctmd.com

1 files changed, 577 insertions, 0 deletions

diff --git a/sys/netipx/ipx_usrreq.c b/sys/netipx/ipx_usrreq.c
new file mode 100644
index 0000000..1434c74
--- /dev/null
+++ b/sys/netipx/ipx_usrreq.c
@@ -0,0 +1,577 @@
+/*
+ * Copyright (c) 1995, Mike Mitchell
+ * 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.
+ *
+ *	@(#)ipx_usrreq.c
+ */
+
+#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 <netipx/ipx.h>
+#include <netipx/ipx_pcb.h>
+#include <netipx/ipx_if.h>
+#include <netipx/ipx_var.h>
+#include <netipx/ipx_error.h>
+
+/*
+ * IPX protocol implementation.
+ */
+
+int noipxRoute;
+
+/*
+ *  This may also be called for raw listeners.
+ */
+void
+ipx_input(m, ipxp)
+	struct mbuf *m;
+	register struct ipxpcb *ipxp;
+{
+	register struct ipx *ipx = mtod(m, struct ipx *);
+	struct ifnet *ifp = m->m_pkthdr.rcvif;
+	struct sockaddr_ipx ipx_ipx = { sizeof(ipx_ipx), AF_IPX };
+
+	if (ipxp==0)
+		panic("No ipxpcb");
+	/*
+	 * Construct sockaddr format source address.
+	 * Stuff source address and datagram in user buffer.
+	 */
+	ipx_ipx.sipx_addr = ipx->ipx_sna;
+	if (ipx_neteqnn(ipx->ipx_sna.x_net, ipx_zeronet) && ifp) {
+		register struct ifaddr *ifa;
+
+		for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next) {
+			if (ifa->ifa_addr->sa_family == AF_IPX) {
+				ipx_ipx.sipx_addr.x_net =
+					IA_SIPX(ifa)->sipx_addr.x_net;
+				break;
+			}
+		}
+	}
+	ipxp->ipxp_rpt = ipx->ipx_pt;
+	if ( ! (ipxp->ipxp_flags & IPXP_RAWIN) ) {
+		m->m_len -= sizeof (struct ipx);
+		m->m_pkthdr.len -= sizeof (struct ipx);
+		m->m_data += sizeof (struct ipx);
+	}
+	if (sbappendaddr(&ipxp->ipxp_socket->so_rcv, (struct sockaddr *)&ipx_ipx,
+	    m, (struct mbuf *)0) == 0)
+		goto bad;
+	sorwakeup(ipxp->ipxp_socket);
+	return;
+bad:
+	m_freem(m);
+}
+
+void
+ipx_abort(ipxp)
+	struct ipxpcb *ipxp;
+{
+	struct socket *so = ipxp->ipxp_socket;
+
+	ipx_pcbdisconnect(ipxp);
+	soisdisconnected(so);
+}
+/*
+ * Drop connection, reporting
+ * the specified error.
+ */
+/* struct ipxpcb * DELETE THIS */
+void
+ipx_drop(ipxp, errno)
+	register struct ipxpcb *ipxp;
+	int errno;
+{
+	struct socket *so = ipxp->ipxp_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;
+	ipx_pcbdisconnect(ipxp);
+	soisdisconnected(so);
+}
+
+int
+ipx_output(ipxp, m0)
+	struct ipxpcb *ipxp;
+	struct mbuf *m0;
+{
+	register struct mbuf *m;
+	register struct ipx *ipx;
+	register struct socket *so;
+	register int len = 0;
+	register struct route *ro;
+	struct mbuf *mprev = NULL;
+
+	/*
+	 * Calculate data length.
+	 */
+	for (m = m0; m; m = m->m_next) {
+		mprev = m;
+		len += m->m_len;
+	}
+	/*
+	 * 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 IPX header
+	 * and addresses and length put into network format.
+	 */
+	m = m0;
+	if (ipxp->ipxp_flags & IPXP_RAWOUT) {
+		ipx = mtod(m, struct ipx *);
+	} else {
+		M_PREPEND(m, sizeof (struct ipx), M_DONTWAIT);
+		if (m == 0)
+			return (ENOBUFS);
+		ipx = mtod(m, struct ipx *);
+		ipx->ipx_tc = 0;
+		ipx->ipx_pt = ipxp->ipxp_dpt;
+		ipx->ipx_sna = ipxp->ipxp_laddr;
+		ipx->ipx_dna = ipxp->ipxp_faddr;
+		len += sizeof (struct ipx);
+	}
+
+	ipx->ipx_len = htons((u_short)len);
+
+	if (ipxcksum) {
+		ipx->ipx_sum = 0;
+		len = ((len - 1) | 1) + 1;
+		ipx->ipx_sum = ipx_cksum(m, len);
+	} else
+		ipx->ipx_sum = 0xffff;
+
+	/*
+	 * Output datagram.
+	 */
+	so = ipxp->ipxp_socket;
+	if (so->so_options & SO_DONTROUTE)
+		return (ipx_outputfl(m, (struct route *)0,
+		    (so->so_options & SO_BROADCAST) | IPX_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 = &ipxp->ipxp_route;
+#ifdef ancient_history
+	/*
+	 * I think that this will all be handled in ipx_pcbconnect!
+	 */
+	if (ro->ro_rt) {
+		if(ipx_neteq(ipxp->ipxp_lastdst, ipx->ipx_dna)) {
+			/*
+			 * This assumes we have no GH type routes
+			 */
+			if (ro->ro_rt->rt_flags & RTF_HOST) {
+				if (!ipx_hosteq(ipxp->ipxp_lastdst, ipx->ipx_dna))
+					goto re_route;
+
+			}
+			if ((ro->ro_rt->rt_flags & RTF_GATEWAY) == 0) {
+				register struct ipx_addr *dst =
+						&satoipx_addr(ro->ro_dst);
+				dst->x_host = ipx->ipx_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;
+		}
+	}
+	ipxp->ipxp_lastdst = ipx->ipx_dna;
+#endif /* ancient_history */
+	if (noipxRoute) ro = 0;
+	return (ipx_outputfl(m, ro, so->so_options & SO_BROADCAST));
+}
+/* ARGSUSED */
+int
+ipx_ctloutput(req, so, level, name, value)
+	int req, level;
+	struct socket *so;
+	int name;
+	struct mbuf **value;
+{
+	register struct mbuf *m;
+	struct ipxpcb *ipxp = sotoipxpcb(so);
+	int mask, error = 0;
+	/*extern long ipx_pexseq;*/ /*XXX*//*JRE*/
+
+	if (ipxp == 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 = IPXP_ALL_PACKETS;
+			goto get_flags;
+
+		case SO_HEADERS_ON_INPUT:
+			mask = IPXP_RAWIN;
+			goto get_flags;
+			
+		case SO_HEADERS_ON_OUTPUT:
+			mask = IPXP_RAWOUT;
+		get_flags:
+			m->m_len = sizeof(short);
+			*mtod(m, short *) = ipxp->ipxp_flags & mask;
+			break;
+
+		case SO_DEFAULT_HEADERS:
+			m->m_len = sizeof(struct ipx);
+			{
+				register struct ipx *ipx = mtod(m, struct ipx *);
+				ipx->ipx_len = 0;
+				ipx->ipx_sum = 0;
+				ipx->ipx_tc = 0;
+				ipx->ipx_pt = ipxp->ipxp_dpt;
+				ipx->ipx_dna = ipxp->ipxp_faddr;
+				ipx->ipx_sna = ipxp->ipxp_laddr;
+			}
+			break;
+
+		case SO_SEQNO:
+			m->m_len = sizeof(long);
+			*mtod(m, long *) = ipx_pexseq++;
+			break;
+
+		default:
+			error = EINVAL;
+		}
+		*value = m;
+		break;
+
+	case PRCO_SETOPT:
+		switch (name) {
+			int *ok;
+
+		case SO_ALL_PACKETS:
+			mask = IPXP_ALL_PACKETS;
+			goto set_head;
+
+		case SO_HEADERS_ON_INPUT:
+			mask = IPXP_RAWIN;
+			goto set_head;
+
+		case SO_HEADERS_ON_OUTPUT:
+			mask = IPXP_RAWOUT;
+		set_head:
+			if (value && *value) {
+				ok = mtod(*value, int *);
+				if (*ok)
+					ipxp->ipxp_flags |= mask;
+				else
+					ipxp->ipxp_flags &= ~mask;
+			} else error = EINVAL;
+			break;
+
+		case SO_DEFAULT_HEADERS:
+			{
+				register struct ipx *ipx
+				    = mtod(*value, struct ipx *);
+				ipxp->ipxp_dpt = ipx->ipx_pt;
+			}
+			break;
+#ifdef IPXIP
+		case SO_IPXIP_ROUTE:
+			error = ipxip_route(*value);
+			break;
+#endif /* IPXIP */
+#ifdef IPXTUNNEL
+		case SO_IPXTUNNEL_ROUTE
+			error = ipxtun_route(*value);
+			break;
+#endif
+		default:
+			error = EINVAL;
+		}
+		if (value && *value)
+			m_freem(*value);
+		break;
+	}
+	return (error);
+}
+
+/*ARGSUSED*/
+int
+ipx_usrreq(so, req, m, nam, control)
+	struct socket *so;
+	int req;
+	struct mbuf *m, *nam, *control;
+{
+	struct ipxpcb *ipxp = sotoipxpcb(so);
+	int error = 0;
+
+	if (req == PRU_CONTROL)
+                return (ipx_control(so, (int)m, (caddr_t)nam,
+			(struct ifnet *)control));
+	if (control && control->m_len) {
+		error = EINVAL;
+		goto release;
+	}
+	if (ipxp == NULL && req != PRU_ATTACH) {
+		error = EINVAL;
+		goto release;
+	}
+	switch (req) {
+
+	case PRU_ATTACH:
+		if (ipxp != NULL) {
+			error = EINVAL;
+			break;
+		}
+		error = ipx_pcballoc(so, &ipxpcb);
+		if (error)
+			break;
+		error = soreserve(so, (u_long) 2048, (u_long) 2048);
+		if (error)
+			break;
+		break;
+
+	case PRU_DETACH:
+		if (ipxp == NULL) {
+			error = ENOTCONN;
+			break;
+		}
+		ipx_pcbdetach(ipxp);
+		break;
+
+	case PRU_BIND:
+		error = ipx_pcbbind(ipxp, nam);
+		break;
+
+	case PRU_LISTEN:
+		error = EOPNOTSUPP;
+		break;
+
+	case PRU_CONNECT:
+		if (!ipx_nullhost(ipxp->ipxp_faddr)) {
+			error = EISCONN;
+			break;
+		}
+		error = ipx_pcbconnect(ipxp, nam);
+		if (error == 0)
+			soisconnected(so);
+		break;
+
+	case PRU_CONNECT2:
+		error = EOPNOTSUPP;
+		break;
+
+	case PRU_ACCEPT:
+		error = EOPNOTSUPP;
+		break;
+
+	case PRU_DISCONNECT:
+		if (ipx_nullhost(ipxp->ipxp_faddr)) {
+			error = ENOTCONN;
+			break;
+		}
+		ipx_pcbdisconnect(ipxp);
+		soisdisconnected(so);
+		break;
+
+	case PRU_SHUTDOWN:
+		socantsendmore(so);
+		break;
+
+	case PRU_SEND:
+	{
+		struct ipx_addr laddr;
+		int s = 0;
+
+		if (nam) {
+			laddr = ipxp->ipxp_laddr;
+			if (!ipx_nullhost(ipxp->ipxp_faddr)) {
+				error = EISCONN;
+				break;
+			}
+			/*
+			 * Must block input while temporarily connected.
+			 */
+			s = splnet();
+			error = ipx_pcbconnect(ipxp, nam);
+			if (error) {
+				splx(s);
+				break;
+			}
+		} else {
+			if (ipx_nullhost(ipxp->ipxp_faddr)) {
+				error = ENOTCONN;
+				break;
+			}
+		}
+		error = ipx_output(ipxp, m);
+		m = NULL;
+		if (nam) {
+			ipx_pcbdisconnect(ipxp);
+			splx(s);
+			ipxp->ipxp_laddr.x_host = laddr.x_host;
+			ipxp->ipxp_laddr.x_port = laddr.x_port;
+		}
+	}
+		break;
+
+	case PRU_ABORT:
+		ipx_pcbdetach(ipxp);
+		sofree(so);
+		soisdisconnected(so);
+		break;
+
+	case PRU_SOCKADDR:
+		ipx_setsockaddr(ipxp, nam);
+		break;
+
+	case PRU_PEERADDR:
+		ipx_setpeeraddr(ipxp, 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("ipx_usrreq");
+	}
+release:
+	if (control != NULL)
+		m_freem(control);
+	if (m != NULL)
+		m_freem(m);
+	return (error);
+}
+/*ARGSUSED*/
+int
+ipx_raw_usrreq(so, req, m, nam, control)
+	struct socket *so;
+	int req;
+	struct mbuf *m, *nam, *control;
+{
+	int error = 0;
+	struct ipxpcb *ipxp = sotoipxpcb(so);
+	/*extern struct ipxpcb ipxrawpcb;*//*XXX*//*JRE*/
+
+	switch (req) {
+
+	case PRU_ATTACH:
+
+		if (!(so->so_state & SS_PRIV) || (ipxp != NULL)) {
+			error = EINVAL;
+			break;
+		}
+		error = ipx_pcballoc(so, &ipxrawpcb);
+		if (error)
+			break;
+		error = soreserve(so, (u_long) 2048, (u_long) 2048);
+		if (error)
+			break;
+		ipxp = sotoipxpcb(so);
+		ipxp->ipxp_faddr.x_host = ipx_broadhost;
+		ipxp->ipxp_flags = IPXP_RAWIN | IPXP_RAWOUT;
+		break;
+	default:
+		error = ipx_usrreq(so, req, m, nam, control);
+	}
+	return (error);
+}
+