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, 211 insertions, 0 deletions

diff --git a/sys/netipx/spx_var.h b/sys/netipx/spx_var.h
new file mode 100644
index 0000000..2e87ee0
--- /dev/null
+++ b/sys/netipx/spx_var.h
@@ -0,0 +1,211 @@
+/*
+ * 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.
+ *
+ *	@(#)spx_var.h
+ */
+
+#ifndef _NETIPX_SPX_VAR_H_
+#define _NETIPX_SPX_VAR_H_
+
+/*
+ * SPX control block, one per connection
+ */
+struct spxpcb {
+	struct	spx_q	s_q;		/* queue for out-of-order receipt */
+	struct	ipxpcb	*s_ipxpcb;	/* 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	ipx	*s_ipx;
+	struct	spxhdr	s_shdr;		/* prototype header to transmit */
+#define s_cc s_shdr.spx_cc		/* connection control (for EM bit) */
+#define s_dt s_shdr.spx_dt		/* datastream type */
+#define s_sid s_shdr.spx_sid		/* source connection identifier */
+#define s_did s_shdr.spx_did		/* destination connection identifier */
+#define s_seq s_shdr.spx_seq		/* sequence number */
+#define s_ack s_shdr.spx_ack		/* acknowledge number */
+#define s_alo s_shdr.spx_alo		/* allocation number */
+#define s_dport s_ipx->ipx_dna.x_port	/* where we are sending */
+	struct spxhdr 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 spx_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[SPXT_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 spx_output */
+	char	s_inx;			/* exit taken from spx_input */
+	u_short	s_flags2;		/* more flags for testing */
+#define SF_NEWCALL	0x100		/* for new_recvmsg */
+#define SO_NEWCALL	10		/* for new_recvmsg */
+};
+
+#define	ipxtospxpcb(np)	((struct spxpcb *)(np)->ipxp_pcb)
+#define	sotospxpcb(so)	(ipxtospxpcb(sotoipxpcb(so)))
+
+struct	spxstat {
+	long	spxs_connattempt;	/* connections initiated */
+	long	spxs_accepts;		/* connections accepted */
+	long	spxs_connects;		/* connections established */
+	long	spxs_drops;		/* connections dropped */
+	long	spxs_conndrops;		/* embryonic connections dropped */
+	long	spxs_closed;		/* conn. closed (includes drops) */
+	long	spxs_segstimed;		/* segs where we tried to get rtt */
+	long	spxs_rttupdated;	/* times we succeeded */
+	long	spxs_delack;		/* delayed acks sent */
+	long	spxs_timeoutdrop;	/* conn. dropped in rxmt timeout */
+	long	spxs_rexmttimeo;	/* retransmit timeouts */
+	long	spxs_persisttimeo;	/* persist timeouts */
+	long	spxs_keeptimeo;		/* keepalive timeouts */
+	long	spxs_keepprobe;		/* keepalive probes sent */
+	long	spxs_keepdrops;		/* connections dropped in keepalive */
+
+	long	spxs_sndtotal;		/* total packets sent */
+	long	spxs_sndpack;		/* data packets sent */
+	long	spxs_sndbyte;		/* data bytes sent */
+	long	spxs_sndrexmitpack;	/* data packets retransmitted */
+	long	spxs_sndrexmitbyte;	/* data bytes retransmitted */
+	long	spxs_sndacks;		/* ack-only packets sent */
+	long	spxs_sndprobe;		/* window probes sent */
+	long	spxs_sndurg;		/* packets sent with URG only */
+	long	spxs_sndwinup;		/* window update-only packets sent */
+	long	spxs_sndctrl;		/* control (SYN|FIN|RST) packets sent */
+	long	spxs_sndvoid;		/* couldn't find requested packet*/
+
+	long	spxs_rcvtotal;		/* total packets received */
+	long	spxs_rcvpack;		/* packets received in sequence */
+	long	spxs_rcvbyte;		/* bytes received in sequence */
+	long	spxs_rcvbadsum;		/* packets received with ccksum errs */
+	long	spxs_rcvbadoff;		/* packets received with bad offset */
+	long	spxs_rcvshort;		/* packets received too short */
+	long	spxs_rcvduppack;	/* duplicate-only packets received */
+	long	spxs_rcvdupbyte;	/* duplicate-only bytes received */
+	long	spxs_rcvpartduppack;	/* packets with some duplicate data */
+	long	spxs_rcvpartdupbyte;	/* dup. bytes in part-dup. packets */
+	long	spxs_rcvoopack;		/* out-of-order packets received */
+	long	spxs_rcvoobyte;		/* out-of-order bytes received */
+	long	spxs_rcvpackafterwin;	/* packets with data after window */
+	long	spxs_rcvbyteafterwin;	/* bytes rcvd after window */
+	long	spxs_rcvafterclose;	/* packets rcvd after "close" */
+	long	spxs_rcvwinprobe;	/* rcvd window probe packets */
+	long	spxs_rcvdupack;		/* rcvd duplicate acks */
+	long	spxs_rcvacktoomuch;	/* rcvd acks for unsent data */
+	long	spxs_rcvackpack;	/* rcvd ack packets */
+	long	spxs_rcvackbyte;	/* bytes acked by rcvd acks */
+	long	spxs_rcvwinupd;		/* rcvd window update packets */
+};
+struct	spx_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 spxstat newstats;
+};
+
+#ifdef KERNEL
+extern struct spx_istat spx_istat;
+extern u_short spx_iss;
+
+/* Following was struct spxstat spxstat; */
+#ifndef spxstat
+#define spxstat spx_istat.newstats
+#endif
+
+#endif
+
+#define	SPX_ISSINCR	128
+/*
+ * spx sequence numbers are 16 bit integers operated
+ * on with modular arithmetic.  These macros can be
+ * used to compare such integers.
+ */
+#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