2 * Copyright (c) 1984, 1985, 1986, 1987, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
29 * Copyright (c) 1995, Mike Mitchell
31 * Redistribution and use in source and binary forms, with or without
32 * modification, are permitted provided that the following conditions
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.
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
64 #ifndef _NETIPX_SPX_H_
65 #define _NETIPX_SPX_H_
68 * Definitions for IPX style Sequenced Packet Protocol
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 */
86 * Definitions for NS(tm) Internet Datagram Protocol
87 * containing a Sequenced Packet Protocol packet.
96 LIST_ENTRY(spx_q) sq_entry;
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
115 * SPX control block, one per connection
118 LIST_HEAD(, spx_q) s_q; /* queue for out-of-order receipt */
119 struct ipxpcb *s_ipxpcb; /* backpointer to internet pcb */
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
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 */
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-
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.
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 */
179 /* out of band data */
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 */
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 */
193 #define ipxtospxpcb(np) ((struct spxpcb *)(np)->ipxp_pcb)
194 #define sotospxpcb(so) (ipxtospxpcb(sotoipxpcb(so)))
198 extern struct pr_usrreqs spx_usrreqs;
199 extern struct pr_usrreqs spx_usrreq_sps;
201 void spx_ctlinput(int cmd, struct sockaddr *arg_as_sa, void *dummy);
202 int spx_ctloutput(struct socket *so, struct sockopt *sopt);
203 void spx_fasttimo(void);
205 void spx_input(struct mbuf *m, struct ipxpcb *ipxp);
206 void spx_slowtimo(void);
210 #endif /* !_NETIPX_SPX_H_ */