2 * Copyright (c) 1995, Mike Mitchell
3 * Copyright (c) 1984, 1985, 1986, 1987, 1993
4 * The Regents of the University of California. All rights reserved.
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7 * modification, are permitted provided that the following conditions
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15 * must display the following acknowledgement:
16 * This product includes software developed by the University of
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36 * $FreeBSD: src/sys/netipx/spx.h,v 1.16 1999/12/29 04:46:09 peter Exp $
37 * $DragonFly: src/sys/netproto/ipx/spx.h,v 1.2 2003/06/17 04:28:53 dillon Exp $
40 #ifndef _NETIPX_SPX_H_
41 #define _NETIPX_SPX_H_
44 * Definitions for IPX style Sequenced Packet Protocol
48 u_char spx_cc; /* connection control */
49 u_char spx_dt; /* datastream type */
50 #define SPX_SP 0x80 /* system packet */
51 #define SPX_SA 0x40 /* send acknowledgement */
52 #define SPX_OB 0x20 /* attention (out of band data) */
53 #define SPX_EM 0x10 /* end of message */
54 u_short spx_sid; /* source connection identifier */
55 u_short spx_did; /* destination connection identifier */
56 u_short spx_seq; /* sequence number */
57 u_short spx_ack; /* acknowledge number */
58 u_short spx_alo; /* allocation number */
62 * Definitions for NS(tm) Internet Datagram Protocol
63 * containing a Sequenced Packet Protocol packet.
70 struct spx_q *si_next;
71 struct spx_q *si_prev;
73 #define SI(x) ((struct spx *)x)
74 #define si_sum si_i.ipx_sum
75 #define si_len si_i.ipx_len
76 #define si_tc si_i.ipx_tc
77 #define si_pt si_i.ipx_pt
78 #define si_dna si_i.ipx_dna
79 #define si_sna si_i.ipx_sna
80 #define si_sport si_i.ipx_sna.x_port
81 #define si_cc si_s.spx_cc
82 #define si_dt si_s.spx_dt
83 #define si_sid si_s.spx_sid
84 #define si_did si_s.spx_did
85 #define si_seq si_s.spx_seq
86 #define si_ack si_s.spx_ack
87 #define si_alo si_s.spx_alo
90 * SPX control block, one per connection
93 struct spx_q s_q; /* queue for out-of-order receipt */
94 struct ipxpcb *s_ipxpcb; /* backpointer to internet pcb */
97 #define SF_ACKNOW 0x01 /* Ack peer immediately */
98 #define SF_DELACK 0x02 /* Ack, but try to delay it */
99 #define SF_HI 0x04 /* Show headers on input */
100 #define SF_HO 0x08 /* Show headers on output */
101 #define SF_PI 0x10 /* Packet (datagram) interface */
102 #define SF_WIN 0x20 /* Window info changed */
103 #define SF_RXT 0x40 /* Rxt info changed */
104 #define SF_RVD 0x80 /* Calling from read usrreq routine */
105 u_short s_mtu; /* Max packet size for this stream */
106 /* use sequence fields in headers to store sequence numbers for this
109 struct spxhdr s_shdr; /* prototype header to transmit */
110 #define s_cc s_shdr.spx_cc /* connection control (for EM bit) */
111 #define s_dt s_shdr.spx_dt /* datastream type */
112 #define s_sid s_shdr.spx_sid /* source connection identifier */
113 #define s_did s_shdr.spx_did /* destination connection identifier */
114 #define s_seq s_shdr.spx_seq /* sequence number */
115 #define s_ack s_shdr.spx_ack /* acknowledge number */
116 #define s_alo s_shdr.spx_alo /* allocation number */
117 #define s_dport s_ipx->ipx_dna.x_port /* where we are sending */
118 struct spxhdr s_rhdr; /* last received header (in effect!)*/
119 u_short s_rack; /* their acknowledge number */
120 u_short s_ralo; /* their allocation number */
121 u_short s_smax; /* highest packet # we have sent */
122 u_short s_snxt; /* which packet to send next */
124 /* congestion control */
125 #define CUNIT 1024 /* scaling for ... */
126 int s_cwnd; /* Congestion-controlled window */
127 /* in packets * CUNIT */
128 short s_swnd; /* == tcp snd_wnd, in packets */
129 short s_smxw; /* == tcp max_sndwnd */
130 /* difference of two spx_seq's can be
131 no bigger than a short */
132 u_short s_swl1; /* == tcp snd_wl1 */
133 u_short s_swl2; /* == tcp snd_wl2 */
134 int s_cwmx; /* max allowable cwnd */
135 int s_ssthresh; /* s_cwnd size threshold for
136 * slow start exponential-to-
138 /* transmit timing stuff
139 * srtt and rttvar are stored as fixed point, for convenience in smoothing.
140 * srtt has 3 bits to the right of the binary point, rttvar has 2.
142 short s_idle; /* time idle */
143 #define SPXT_NTIMERS 4
144 short s_timer[SPXT_NTIMERS]; /* timers */
145 short s_rxtshift; /* log(2) of rexmt exp. backoff */
146 short s_rxtcur; /* current retransmit value */
147 u_short s_rtseq; /* packet being timed */
148 short s_rtt; /* timer for round trips */
149 short s_srtt; /* averaged timer */
150 short s_rttvar; /* variance in round trip time */
151 char s_force; /* which timer expired */
152 char s_dupacks; /* counter to intuit xmt loss */
154 /* out of band data */
156 #define SF_SOOB 0x08 /* sending out of band data */
157 #define SF_IOOB 0x10 /* receiving out of band data */
158 char s_iobc; /* input characters */
160 u_short s_want; /* Last candidate for sending */
161 char s_outx; /* exit taken from spx_output */
162 char s_inx; /* exit taken from spx_input */
163 u_short s_flags2; /* more flags for testing */
164 #define SF_NEWCALL 0x100 /* for new_recvmsg */
165 #define SO_NEWCALL 10 /* for new_recvmsg */
168 #define ipxtospxpcb(np) ((struct spxpcb *)(np)->ipxp_pcb)
169 #define sotospxpcb(so) (ipxtospxpcb(sotoipxpcb(so)))
173 extern struct pr_usrreqs spx_usrreqs;
174 extern struct pr_usrreqs spx_usrreq_sps;
176 void spx_ctlinput __P((int cmd, struct sockaddr *arg_as_sa, void *dummy));
177 int spx_ctloutput __P((struct socket *so, struct sockopt *sopt));
178 void spx_fasttimo __P((void));
179 void spx_init __P((void));
180 void spx_input __P((struct mbuf *m, struct ipxpcb *ipxp));
181 void spx_slowtimo __P((void));
185 #endif /* !_NETIPX_SPX_H_ */