1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
|
/* $NetBSD: spp_var.h,v 1.5 1995/03/26 20:36:23 jtc Exp $ */
/*
* 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.
*
* @(#)spp_var.h 8.1 (Berkeley) 6/10/93
*/
/*
* Sp control block, one per connection
*/
struct sppcb {
struct spidp_q s_q; /* queue for out-of-order receipt */
struct nspcb *s_nspcb; /* 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 idp *s_idp;
struct sphdr s_shdr; /* prototype header to transmit */
#define s_cc s_shdr.sp_cc /* connection control (for EM bit) */
#define s_dt s_shdr.sp_dt /* datastream type */
#define s_sid s_shdr.sp_sid /* source connection identifier */
#define s_did s_shdr.sp_did /* destination connection identifier */
#define s_seq s_shdr.sp_seq /* sequence number */
#define s_ack s_shdr.sp_ack /* acknowledge number */
#define s_alo s_shdr.sp_alo /* allocation number */
#define s_dport s_idp->idp_dna.x_port /* where we are sending */
struct sphdr 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 spp_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[SPPT_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 spp_output */
char s_inx; /* exit taken from spp_input */
u_short s_flags2; /* more flags for testing */
#define SF_NEWCALL 0x100 /* for new_recvmsg */
#define SO_NEWCALL 10 /* for new_recvmsg */
};
#define nstosppcb(np) ((struct sppcb *)(np)->nsp_pcb)
#define sotosppcb(so) (nstosppcb(sotonspcb(so)))
struct sppstat {
long spps_connattempt; /* connections initiated */
long spps_accepts; /* connections accepted */
long spps_connects; /* connections established */
long spps_drops; /* connections dropped */
long spps_conndrops; /* embryonic connections dropped */
long spps_closed; /* conn. closed (includes drops) */
long spps_segstimed; /* segs where we tried to get rtt */
long spps_rttupdated; /* times we succeeded */
long spps_delack; /* delayed acks sent */
long spps_timeoutdrop; /* conn. dropped in rxmt timeout */
long spps_rexmttimeo; /* retransmit timeouts */
long spps_persisttimeo; /* persist timeouts */
long spps_keeptimeo; /* keepalive timeouts */
long spps_keepprobe; /* keepalive probes sent */
long spps_keepdrops; /* connections dropped in keepalive */
long spps_sndtotal; /* total packets sent */
long spps_sndpack; /* data packets sent */
long spps_sndbyte; /* data bytes sent */
long spps_sndrexmitpack; /* data packets retransmitted */
long spps_sndrexmitbyte; /* data bytes retransmitted */
long spps_sndacks; /* ack-only packets sent */
long spps_sndprobe; /* window probes sent */
long spps_sndurg; /* packets sent with URG only */
long spps_sndwinup; /* window update-only packets sent */
long spps_sndctrl; /* control (SYN|FIN|RST) packets sent */
long spps_sndvoid; /* couldn't find requested packet*/
long spps_rcvtotal; /* total packets received */
long spps_rcvpack; /* packets received in sequence */
long spps_rcvbyte; /* bytes received in sequence */
long spps_rcvbadsum; /* packets received with ccksum errs */
long spps_rcvbadoff; /* packets received with bad offset */
long spps_rcvshort; /* packets received too short */
long spps_rcvduppack; /* duplicate-only packets received */
long spps_rcvdupbyte; /* duplicate-only bytes received */
long spps_rcvpartduppack; /* packets with some duplicate data */
long spps_rcvpartdupbyte; /* dup. bytes in part-dup. packets */
long spps_rcvoopack; /* out-of-order packets received */
long spps_rcvoobyte; /* out-of-order bytes received */
long spps_rcvpackafterwin; /* packets with data after window */
long spps_rcvbyteafterwin; /* bytes rcvd after window */
long spps_rcvafterclose; /* packets rcvd after "close" */
long spps_rcvwinprobe; /* rcvd window probe packets */
long spps_rcvdupack; /* rcvd duplicate acks */
long spps_rcvacktoomuch; /* rcvd acks for unsent data */
long spps_rcvackpack; /* rcvd ack packets */
long spps_rcvackbyte; /* bytes acked by rcvd acks */
long spps_rcvwinupd; /* rcvd window update packets */
};
struct spp_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 sppstat newstats;
};
#ifdef _KERNEL
struct spp_istat spp_istat;
/* Following was struct sppstat sppstat; */
#ifndef sppstat
#define sppstat spp_istat.newstats
#endif
u_short spp_iss;
extern struct sppcb *spp_close(), *spp_disconnect(),
*spp_usrclosed(), *spp_timers(), *spp_drop();
#endif
#define SPP_ISSINCR 128
/*
* SPP sequence numbers are 16 bit integers operated
* on with modular arithmetic. These macros can be
* used to compare such integers.
*/
#ifdef sun
short xnsCbug;
#define SSEQ_LT(a,b) ((xnsCbug = (short)((a)-(b))) < 0)
#define SSEQ_LEQ(a,b) ((xnsCbug = (short)((a)-(b))) <= 0)
#define SSEQ_GT(a,b) ((xnsCbug = (short)((a)-(b))) > 0)
#define SSEQ_GEQ(a,b) ((xnsCbug = (short)((a)-(b))) >= 0)
#else
#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
|
