1/*- 2 * Copyright (c) 1984, 1985, 1986, 1987, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * Copyright (c) 1995, Mike Mitchell 30 * 31 * Redistribution and use in source and binary forms, with or without 32 * modification, are permitted provided that the following conditions 33 * are met: 34 * 1. Redistributions of source code must retain the above copyright 35 * notice, this list of conditions and the following disclaimer. 36 * 2. Redistributions in binary form must reproduce the above copyright 37 * notice, this list of conditions and the following disclaimer in the 38 * documentation and/or other materials provided with the distribution. 39 * 3. All advertising materials mentioning features or use of this software 40 * must display the following acknowledgement: 41 * This product includes software developed by the University of 42 * California, Berkeley and its contributors. 43 * 4. Neither the name of the University nor the names of its contributors 44 * may be used to endorse or promote products derived from this software 45 * without specific prior written permission. 46 * 47 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 48 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 49 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 50 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 51 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 52 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 53 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 54 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 55 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 56 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 57 * SUCH DAMAGE. 58 * 59 * @(#)spx.h 60 * 61 * $FreeBSD$ 62 */ 63 64#ifndef _NETIPX_SPX_H_ 65#define _NETIPX_SPX_H_ 66 67/* 68 * Definitions for IPX style Sequenced Packet Protocol 69 */ 70 71struct spxhdr { 72 u_char spx_cc; /* connection control */ 73 u_char spx_dt; /* datastream type */ 74#define SPX_SP 0x80 /* system packet */ 75#define SPX_SA 0x40 /* send acknowledgement */ 76#define SPX_OB 0x20 /* attention (out of band data) */ 77#define SPX_EM 0x10 /* end of message */ 78 u_short spx_sid; /* source connection identifier */ 79 u_short spx_did; /* destination connection identifier */ 80 u_short spx_seq; /* sequence number */ 81 u_short spx_ack; /* acknowledge number */ 82 u_short spx_alo; /* allocation number */ 83} __packed; 84 85/* 86 * Definitions for NS(tm) Internet Datagram Protocol 87 * containing a Sequenced Packet Protocol packet. 88 */ 89struct spx { 90 struct ipx si_i; 91 struct spxhdr si_s; 92} __packed; 93struct spx_q { 94 struct mbuf *sq_msi; 95 struct spx *sq_si; 96 LIST_ENTRY(spx_q) sq_entry; 97}; 98#define SI(x) ((struct spx *)x) 99#define si_sum si_i.ipx_sum 100#define si_len si_i.ipx_len 101#define si_tc si_i.ipx_tc 102#define si_pt si_i.ipx_pt 103#define si_dna si_i.ipx_dna 104#define si_sna si_i.ipx_sna 105#define si_sport si_i.ipx_sna.x_port 106#define si_cc si_s.spx_cc 107#define si_dt si_s.spx_dt 108#define si_sid si_s.spx_sid 109#define si_did si_s.spx_did 110#define si_seq si_s.spx_seq 111#define si_ack si_s.spx_ack 112#define si_alo si_s.spx_alo 113 114/* 115 * SPX control block, one per connection 116 */ 117struct spxpcb { 118 LIST_HEAD(, spx_q) s_q; /* queue for out-of-order receipt */ 119 struct ipxpcb *s_ipxpcb; /* backpointer to internet pcb */ 120 u_char s_state; 121 u_char s_flags; 122#define SF_ACKNOW 0x01 /* Ack peer immediately */ 123#define SF_DELACK 0x02 /* Ack, but try to delay it */ 124#define SF_HI 0x04 /* Show headers on input */ 125#define SF_HO 0x08 /* Show headers on output */ 126#define SF_PI 0x10 /* Packet (datagram) interface */ 127#define SF_WIN 0x20 /* Window info changed */ 128#define SF_RXT 0x40 /* Rxt info changed */ 129#define SF_RVD 0x80 /* Calling from read usrreq routine */ 130 u_short s_mtu; /* Max packet size for this stream */ 131/* use sequence fields in headers to store sequence numbers for this 132 connection */ 133 struct ipx s_ipx; 134 struct spxhdr s_shdr; /* prototype header to transmit */ 135#define s_cc s_shdr.spx_cc /* connection control (for EM bit) */ 136#define s_dt s_shdr.spx_dt /* datastream type */ 137#define s_sid s_shdr.spx_sid /* source connection identifier */ 138#define s_did s_shdr.spx_did /* destination connection identifier */ 139#define s_seq s_shdr.spx_seq /* sequence number */ 140#define s_ack s_shdr.spx_ack /* acknowledge number */ 141#define s_alo s_shdr.spx_alo /* allocation number */ 142#define s_dport s_ipx.ipx_dna.x_port /* where we are sending */ 143 struct spxhdr s_rhdr; /* last received header (in effect!)*/ 144 u_short s_rack; /* their acknowledge number */ 145 u_short s_ralo; /* their allocation number */ 146 u_short s_smax; /* highest packet # we have sent */ 147 u_short s_snxt; /* which packet to send next */ 148 149/* congestion control */ 150#define CUNIT 1024 /* scaling for ... */ 151 int s_cwnd; /* Congestion-controlled window */ 152 /* in packets * CUNIT */ 153 short s_swnd; /* == tcp snd_wnd, in packets */ 154 short s_smxw; /* == tcp max_sndwnd */ 155 /* difference of two spx_seq's can be 156 no bigger than a short */ 157 u_short s_swl1; /* == tcp snd_wl1 */ 158 u_short s_swl2; /* == tcp snd_wl2 */ 159 int s_cwmx; /* max allowable cwnd */ 160 int s_ssthresh; /* s_cwnd size threshold for 161 * slow start exponential-to- 162 * linear switch */ 163/* transmit timing stuff 164 * srtt and rttvar are stored as fixed point, for convenience in smoothing. 165 * srtt has 3 bits to the right of the binary point, rttvar has 2. 166 */ 167 short s_idle; /* time idle */ 168#define SPXT_NTIMERS 4 169 short s_timer[SPXT_NTIMERS]; /* timers */ 170 short s_rxtshift; /* log(2) of rexmt exp. backoff */ 171 short s_rxtcur; /* current retransmit value */ 172 u_short s_rtseq; /* packet being timed */ 173 short s_rtt; /* timer for round trips */ 174 short s_srtt; /* averaged timer */ 175 short s_rttvar; /* variance in round trip time */ 176 char s_force; /* which timer expired */ 177 char s_dupacks; /* counter to intuit xmt loss */ 178 179/* out of band data */ 180 char s_oobflags; 181#define SF_SOOB 0x08 /* sending out of band data */ 182#define SF_IOOB 0x10 /* receiving out of band data */ 183 char s_iobc; /* input characters */ 184/* debug stuff */ 185 u_short s_want; /* Last candidate for sending */ 186 char s_outx; /* exit taken from spx_output */ 187 char s_inx; /* exit taken from spx_input */ 188 u_short s_flags2; /* more flags for testing */ 189#define SF_NEWCALL 0x100 /* for new_recvmsg */ 190#define SO_NEWCALL 10 /* for new_recvmsg */ 191}; 192 193#define ipxtospxpcb(np) ((struct spxpcb *)(np)->ipxp_pcb) 194#define sotospxpcb(so) (ipxtospxpcb(sotoipxpcb(so))) 195 196#ifdef _KERNEL 197 198extern struct pr_usrreqs spx_usrreqs; 199extern struct pr_usrreqs spx_usrreq_sps; 200 201void spx_ctlinput(int cmd, struct sockaddr *arg_as_sa, void *dummy); 202int spx_ctloutput(struct socket *so, struct sockopt *sopt); 203void spx_fasttimo(void); 204void spx_init(void); 205void spx_input(struct mbuf *m, struct ipxpcb *ipxp); 206void spx_slowtimo(void); 207 208#endif /* _KERNEL */ 209 210#endif /* !_NETIPX_SPX_H_ */ 211