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, 373 insertions, 0 deletions

diff --git a/sys/netipx/ipx_pcb.c b/sys/netipx/ipx_pcb.c
new file mode 100644
index 0000000..d2d625c
--- /dev/null
+++ b/sys/netipx/ipx_pcb.c
@@ -0,0 +1,373 @@
+/*
+ * 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_pcb.c
+ */
+
+#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 <netipx/ipx.h>
+#include <netipx/ipx_if.h>
+#include <netipx/ipx_pcb.h>
+
+struct	ipx_addr zeroipx_addr;
+
+int
+ipx_pcballoc(so, head)
+	struct socket *so;
+	struct ipxpcb *head;
+{
+	struct mbuf *m;
+	register struct ipxpcb *ipxp;
+
+	m = m_getclr(M_DONTWAIT, MT_PCB);
+	if (m == NULL)
+		return (ENOBUFS);
+	ipxp = mtod(m, struct ipxpcb *);
+	ipxp->ipxp_socket = so;
+	insque(ipxp, head);
+	so->so_pcb = (caddr_t)ipxp;
+	return (0);
+}
+	
+int
+ipx_pcbbind(ipxp, nam)
+	register struct ipxpcb *ipxp;
+	struct mbuf *nam;
+{
+	register struct sockaddr_ipx *sipx;
+	u_short lport = 0;
+
+	if (ipxp->ipxp_lport || !ipx_nullhost(ipxp->ipxp_laddr))
+		return (EINVAL);
+	if (nam == 0)
+		goto noname;
+	sipx = mtod(nam, struct sockaddr_ipx *);
+	if (nam->m_len != sizeof (*sipx))
+		return (EINVAL);
+	if (!ipx_nullhost(sipx->sipx_addr)) {
+		int tport = sipx->sipx_port;
+
+		sipx->sipx_port = 0;		/* yech... */
+		if (ifa_ifwithaddr((struct sockaddr *)sipx) == 0)
+			return (EADDRNOTAVAIL);
+		sipx->sipx_port = tport;
+	}
+	lport = sipx->sipx_port;
+	if (lport) {
+		u_short aport = ntohs(lport);
+
+		if (aport < IPXPORT_MAX &&
+		    (ipxp->ipxp_socket->so_state & SS_PRIV) == 0)
+			return (EACCES);
+		if (ipx_pcblookup(&zeroipx_addr, lport, 0))
+			return (EADDRINUSE);
+	}
+	ipxp->ipxp_laddr = sipx->sipx_addr;
+noname:
+	if (lport == 0)
+		do {
+			if (ipxpcb.ipxp_lport++ < IPXPORT_MAX)
+				ipxpcb.ipxp_lport = IPXPORT_MAX;
+			lport = htons(ipxpcb.ipxp_lport);
+		} while (ipx_pcblookup(&zeroipx_addr, lport, 0));
+	ipxp->ipxp_lport = lport;
+	return (0);
+}
+
+/*
+ * Connect from a socket to a specified address.
+ * Both address and port must be specified in argument sipx.
+ * If don't have a local address for this socket yet,
+ * then pick one.
+ */
+int
+ipx_pcbconnect(ipxp, nam)
+	struct ipxpcb *ipxp;
+	struct mbuf *nam;
+{
+	struct ipx_ifaddr *ia;
+	register struct sockaddr_ipx *sipx = mtod(nam, struct sockaddr_ipx *);
+	register struct ipx_addr *dst;
+	register struct route *ro;
+	struct ifnet *ifp;
+
+	if (nam->m_len != sizeof (*sipx))
+		return (EINVAL);
+	if (sipx->sipx_family != AF_IPX)
+		return (EAFNOSUPPORT);
+	if (sipx->sipx_port==0 || ipx_nullhost(sipx->sipx_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 = &ipxp->ipxp_route;
+	dst = &satoipx_addr(ro->ro_dst);
+	if (ipxp->ipxp_socket->so_options & SO_DONTROUTE)
+		goto flush;
+	if (!ipx_neteq(ipxp->ipxp_lastdst, sipx->sipx_addr))
+		goto flush;
+	if (!ipx_hosteq(ipxp->ipxp_lastdst, sipx->sipx_addr)) {
+		if (ro->ro_rt && ! (ro->ro_rt->rt_flags & RTF_HOST)) {
+			/* can patch route to avoid rtalloc */
+			*dst = sipx->sipx_addr;
+		} else {
+	flush:
+			if (ro->ro_rt)
+				RTFREE(ro->ro_rt);
+			ro->ro_rt = (struct rtentry *)0;
+			ipxp->ipxp_laddr.x_net = ipx_zeronet;
+		}
+	}/* else cached route is ok; do nothing */
+	ipxp->ipxp_lastdst = sipx->sipx_addr;
+	if ((ipxp->ipxp_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_IPX;
+		    ro->ro_dst.sa_len = sizeof(ro->ro_dst);
+		    *dst = sipx->sipx_addr;
+		    dst->x_port = 0;
+		    rtalloc(ro);
+	}
+	if (ipx_neteqnn(ipxp->ipxp_laddr.x_net, ipx_zeronet)) {
+		/* 
+		 * If route is known or can be allocated now,
+		 * our src addr is taken from the i/f, else punt.
+		 */
+
+		ia = (struct ipx_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 = ipx_ifaddr; ia; ia = ia->ia_next)
+				if (ia->ia_ifp == ifp)
+					break;
+		if (ia == 0) {
+			u_short fport = sipx->sipx_addr.x_port;
+			sipx->sipx_addr.x_port = 0;
+			ia = (struct ipx_ifaddr *)
+				ifa_ifwithdstaddr((struct sockaddr *)sipx);
+			sipx->sipx_addr.x_port = fport;
+			if (ia == 0)
+				ia = ipx_iaonnetof(&sipx->sipx_addr);
+			if (ia == 0)
+				ia = ipx_ifaddr;
+			if (ia == 0)
+				return (EADDRNOTAVAIL);
+		}
+		ipxp->ipxp_laddr.x_net = satoipx_addr(ia->ia_addr).x_net;
+	}
+	if (ipx_pcblookup(&sipx->sipx_addr, ipxp->ipxp_lport, 0))
+		return (EADDRINUSE);
+	if (ipx_nullhost(ipxp->ipxp_laddr)) {
+		if (ipxp->ipxp_lport == 0)
+			(void) ipx_pcbbind(ipxp, (struct mbuf *)0);
+		ipxp->ipxp_laddr.x_host = ipx_thishost;
+	}
+	ipxp->ipxp_faddr = sipx->sipx_addr;
+	/* Includes ipxp->ipxp_fport = sipx->sipx_port; */
+	return (0);
+}
+
+void
+ipx_pcbdisconnect(ipxp)
+	struct ipxpcb *ipxp;
+{
+
+	ipxp->ipxp_faddr = zeroipx_addr;
+	if (ipxp->ipxp_socket->so_state & SS_NOFDREF)
+		ipx_pcbdetach(ipxp);
+}
+
+void
+ipx_pcbdetach(ipxp)
+	struct ipxpcb *ipxp;
+{
+	struct socket *so = ipxp->ipxp_socket;
+
+	so->so_pcb = 0;
+	sofree(so);
+	if (ipxp->ipxp_route.ro_rt)
+		rtfree(ipxp->ipxp_route.ro_rt);
+	remque(ipxp);
+	(void) m_free(dtom(ipxp));
+}
+
+void
+ipx_setsockaddr(ipxp, nam)
+	register struct ipxpcb *ipxp;
+	struct mbuf *nam;
+{
+	register struct sockaddr_ipx *sipx = mtod(nam, struct sockaddr_ipx *);
+	
+	nam->m_len = sizeof (*sipx);
+	sipx = mtod(nam, struct sockaddr_ipx *);
+	bzero((caddr_t)sipx, sizeof (*sipx));
+	sipx->sipx_len = sizeof(*sipx);
+	sipx->sipx_family = AF_IPX;
+	sipx->sipx_addr = ipxp->ipxp_laddr;
+}
+
+void
+ipx_setpeeraddr(ipxp, nam)
+	register struct ipxpcb *ipxp;
+	struct mbuf *nam;
+{
+	register struct sockaddr_ipx *sipx = mtod(nam, struct sockaddr_ipx *);
+	
+	nam->m_len = sizeof (*sipx);
+	sipx = mtod(nam, struct sockaddr_ipx *);
+	bzero((caddr_t)sipx, sizeof (*sipx));
+	sipx->sipx_len = sizeof(*sipx);
+	sipx->sipx_family = AF_IPX;
+	sipx->sipx_addr = ipxp->ipxp_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 ipxpcb. (which may in fact
+ * be a parameter list!)
+ */
+void
+ipx_pcbnotify(dst, errno, notify, param)
+	register struct ipx_addr *dst;
+	long param;
+	int errno, (*notify)();
+{
+	register struct ipxpcb *ipxp, *oinp;
+	int s = splimp();
+
+	for (ipxp = (&ipxpcb)->ipxp_next; ipxp != (&ipxpcb);) {
+		if (!ipx_hosteq(*dst,ipxp->ipxp_faddr)) {
+	next:
+			ipxp = ipxp->ipxp_next;
+			continue;
+		}
+		if (ipxp->ipxp_socket == 0)
+			goto next;
+		if (errno) 
+			ipxp->ipxp_socket->so_error = errno;
+		oinp = ipxp;
+		ipxp = ipxp->ipxp_next;
+		oinp->ipxp_notify_param = param;
+		(*notify)(oinp);
+	}
+	splx(s);
+}
+
+#ifdef notdef
+/*
+ * After a routing change, flush old routing
+ * and allocate a (hopefully) better one.
+ */
+ipx_rtchange(ipxp)
+	struct ipxpcb *ipxp;
+{
+	if (ipxp->ipxp_route.ro_rt) {
+		rtfree(ipxp->ipxp_route.ro_rt);
+		ipxp->ipxp_route.ro_rt = 0;
+		/*
+		 * A new route can be allocated the next time
+		 * output is attempted.
+		 */
+	}
+	/* SHOULD NOTIFY HIGHER-LEVEL PROTOCOLS */
+}
+#endif
+
+struct ipxpcb *
+ipx_pcblookup(faddr, lport, wildp)
+	struct ipx_addr *faddr;
+	u_short lport;
+	int wildp;
+{
+	register struct ipxpcb *ipxp, *match = 0;
+	int matchwild = 3, wildcard;
+	u_short fport;
+
+	fport = faddr->x_port;
+	for (ipxp = (&ipxpcb)->ipxp_next; ipxp != (&ipxpcb); ipxp = ipxp->ipxp_next) {
+		if (ipxp->ipxp_lport != lport)
+			continue;
+		wildcard = 0;
+		if (ipx_nullhost(ipxp->ipxp_faddr)) {
+			if (!ipx_nullhost(*faddr))
+				wildcard++;
+		} else {
+			if (ipx_nullhost(*faddr))
+				wildcard++;
+			else {
+				if (!ipx_hosteq(ipxp->ipxp_faddr, *faddr))
+					continue;
+				if (ipxp->ipxp_fport != fport) {
+					if (ipxp->ipxp_fport != 0)
+						continue;
+					else
+						wildcard++;
+				}
+			}
+		}
+		if (wildcard && wildp==0)
+			continue;
+		if (wildcard < matchwild) {
+			match = ipxp;
+			matchwild = wildcard;
+			if (wildcard == 0)
+				break;
+		}
+	}
+	return (match);
+}