/* * 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.h * * $FreeBSD: src/sys/netipx/spx.h,v 1.16 1999/12/29 04:46:09 peter Exp $ * $DragonFly: src/sys/netproto/ipx/spx.h,v 1.4 2004/06/04 20:27:31 dillon Exp $ */ #ifndef _NETIPX_SPX_H_ #define _NETIPX_SPX_H_ /* * Definitions for IPX style Sequenced Packet Protocol */ struct spxhdr { u_char spx_cc; /* connection control */ u_char spx_dt; /* datastream type */ #define SPX_SP 0x80 /* system packet */ #define SPX_SA 0x40 /* send acknowledgement */ #define SPX_OB 0x20 /* attention (out of band data) */ #define SPX_EM 0x10 /* end of message */ u_short spx_sid; /* source connection identifier */ u_short spx_did; /* destination connection identifier */ u_short spx_seq; /* sequence number */ u_short spx_ack; /* acknowledge number */ u_short spx_alo; /* allocation number */ }; /* * Definitions for NS(tm) Internet Datagram Protocol * containing a Sequenced Packet Protocol packet. */ struct spx { struct ipx si_i; struct spxhdr si_s; }; struct spx_q { struct spx_q *si_next; struct spx_q *si_prev; struct mbuf *si_mbuf; }; #define SI(x) mtod((x)->si_mbuf, struct spx *) #define si_sum si_i.ipx_sum #define si_len si_i.ipx_len #define si_tc si_i.ipx_tc #define si_pt si_i.ipx_pt #define si_dna si_i.ipx_dna #define si_sna si_i.ipx_sna #define si_sport si_i.ipx_sna.x_port #define si_cc si_s.spx_cc #define si_dt si_s.spx_dt #define si_sid si_s.spx_sid #define si_did si_s.spx_did #define si_seq si_s.spx_seq #define si_ack si_s.spx_ack #define si_alo si_s.spx_alo /* * 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 mbuf *s_ipx_m; 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 threshold 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 */ #define SPXT_NTIMERS 4 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))) #ifdef _KERNEL extern struct pr_usrreqs spx_usrreqs; extern struct pr_usrreqs spx_usrreq_sps; void spx_ctlinput (int cmd, struct sockaddr *arg_as_sa, void *dummy); int spx_ctloutput (struct socket *so, struct sockopt *sopt); void spx_fasttimo (void); void spx_init (void); void spx_input (struct mbuf *m, struct ipxpcb *ipxp); void spx_slowtimo (void); #endif /* _KERNEL */ #endif /* !_NETIPX_SPX_H_ */