FreeBSD/Linux Kernel Cross Reference
sys/netns/spp_var.h
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 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * @(#)spp_var.h 8.1 (Berkeley) 6/10/93
34 * $FreeBSD$
35 */
36
37 #ifndef _NETNS_SPP_VAR_H_
38 #define _NETNS_SPP_VAR_H_
39
40 /*
41 * Sp control block, one per connection
42 */
43 struct sppcb {
44 struct spidp_q s_q; /* queue for out-of-order receipt */
45 struct nspcb *s_nspcb; /* backpointer to internet pcb */
46 u_char s_state;
47 u_char s_flags;
48 #define SF_ACKNOW 0x01 /* Ack peer immediately */
49 #define SF_DELACK 0x02 /* Ack, but try to delay it */
50 #define SF_HI 0x04 /* Show headers on input */
51 #define SF_HO 0x08 /* Show headers on output */
52 #define SF_PI 0x10 /* Packet (datagram) interface */
53 #define SF_WIN 0x20 /* Window info changed */
54 #define SF_RXT 0x40 /* Rxt info changed */
55 #define SF_RVD 0x80 /* Calling from read usrreq routine */
56 u_short s_mtu; /* Max packet size for this stream */
57 /* use sequence fields in headers to store sequence numbers for this
58 connection */
59 struct idp *s_idp;
60 struct sphdr s_shdr; /* prototype header to transmit */
61 #define s_cc s_shdr.sp_cc /* connection control (for EM bit) */
62 #define s_dt s_shdr.sp_dt /* datastream type */
63 #define s_sid s_shdr.sp_sid /* source connection identifier */
64 #define s_did s_shdr.sp_did /* destination connection identifier */
65 #define s_seq s_shdr.sp_seq /* sequence number */
66 #define s_ack s_shdr.sp_ack /* acknowledge number */
67 #define s_alo s_shdr.sp_alo /* allocation number */
68 #define s_dport s_idp->idp_dna.x_port /* where we are sending */
69 struct sphdr s_rhdr; /* last received header (in effect!)*/
70 u_short s_rack; /* their acknowledge number */
71 u_short s_ralo; /* their allocation number */
72 u_short s_smax; /* highest packet # we have sent */
73 u_short s_snxt; /* which packet to send next */
74
75 /* congestion control */
76 #define CUNIT 1024 /* scaling for ... */
77 int s_cwnd; /* Congestion-controlled window */
78 /* in packets * CUNIT */
79 short s_swnd; /* == tcp snd_wnd, in packets */
80 short s_smxw; /* == tcp max_sndwnd */
81 /* difference of two spp_seq's can be
82 no bigger than a short */
83 u_short s_swl1; /* == tcp snd_wl1 */
84 u_short s_swl2; /* == tcp snd_wl2 */
85 int s_cwmx; /* max allowable cwnd */
86 int s_ssthresh; /* s_cwnd size threshhold for
87 * slow start exponential-to-
88 * linear switch */
89 /* transmit timing stuff
90 * srtt and rttvar are stored as fixed point, for convenience in smoothing.
91 * srtt has 3 bits to the right of the binary point, rttvar has 2.
92 */
93 short s_idle; /* time idle */
94 short s_timer[SPPT_NTIMERS]; /* timers */
95 short s_rxtshift; /* log(2) of rexmt exp. backoff */
96 short s_rxtcur; /* current retransmit value */
97 u_short s_rtseq; /* packet being timed */
98 short s_rtt; /* timer for round trips */
99 short s_srtt; /* averaged timer */
100 short s_rttvar; /* variance in round trip time */
101 char s_force; /* which timer expired */
102 char s_dupacks; /* counter to intuit xmt loss */
103
104 /* out of band data */
105 char s_oobflags;
106 #define SF_SOOB 0x08 /* sending out of band data */
107 #define SF_IOOB 0x10 /* receiving out of band data */
108 char s_iobc; /* input characters */
109 /* debug stuff */
110 u_short s_want; /* Last candidate for sending */
111 char s_outx; /* exit taken from spp_output */
112 char s_inx; /* exit taken from spp_input */
113 u_short s_flags2; /* more flags for testing */
114 #define SF_NEWCALL 0x100 /* for new_recvmsg */
115 #define SO_NEWCALL 10 /* for new_recvmsg */
116 };
117
118 #define nstosppcb(np) ((struct sppcb *)(np)->nsp_pcb)
119 #define sotosppcb(so) (nstosppcb(sotonspcb(so)))
120
121 struct sppstat {
122 long spps_connattempt; /* connections initiated */
123 long spps_accepts; /* connections accepted */
124 long spps_connects; /* connections established */
125 long spps_drops; /* connections dropped */
126 long spps_conndrops; /* embryonic connections dropped */
127 long spps_closed; /* conn. closed (includes drops) */
128 long spps_segstimed; /* segs where we tried to get rtt */
129 long spps_rttupdated; /* times we succeeded */
130 long spps_delack; /* delayed acks sent */
131 long spps_timeoutdrop; /* conn. dropped in rxmt timeout */
132 long spps_rexmttimeo; /* retransmit timeouts */
133 long spps_persisttimeo; /* persist timeouts */
134 long spps_keeptimeo; /* keepalive timeouts */
135 long spps_keepprobe; /* keepalive probes sent */
136 long spps_keepdrops; /* connections dropped in keepalive */
137
138 long spps_sndtotal; /* total packets sent */
139 long spps_sndpack; /* data packets sent */
140 long spps_sndbyte; /* data bytes sent */
141 long spps_sndrexmitpack; /* data packets retransmitted */
142 long spps_sndrexmitbyte; /* data bytes retransmitted */
143 long spps_sndacks; /* ack-only packets sent */
144 long spps_sndprobe; /* window probes sent */
145 long spps_sndurg; /* packets sent with URG only */
146 long spps_sndwinup; /* window update-only packets sent */
147 long spps_sndctrl; /* control (SYN|FIN|RST) packets sent */
148 long spps_sndvoid; /* couldn't find requested packet*/
149
150 long spps_rcvtotal; /* total packets received */
151 long spps_rcvpack; /* packets received in sequence */
152 long spps_rcvbyte; /* bytes received in sequence */
153 long spps_rcvbadsum; /* packets received with ccksum errs */
154 long spps_rcvbadoff; /* packets received with bad offset */
155 long spps_rcvshort; /* packets received too short */
156 long spps_rcvduppack; /* duplicate-only packets received */
157 long spps_rcvdupbyte; /* duplicate-only bytes received */
158 long spps_rcvpartduppack; /* packets with some duplicate data */
159 long spps_rcvpartdupbyte; /* dup. bytes in part-dup. packets */
160 long spps_rcvoopack; /* out-of-order packets received */
161 long spps_rcvoobyte; /* out-of-order bytes received */
162 long spps_rcvpackafterwin; /* packets with data after window */
163 long spps_rcvbyteafterwin; /* bytes rcvd after window */
164 long spps_rcvafterclose; /* packets rcvd after "close" */
165 long spps_rcvwinprobe; /* rcvd window probe packets */
166 long spps_rcvdupack; /* rcvd duplicate acks */
167 long spps_rcvacktoomuch; /* rcvd acks for unsent data */
168 long spps_rcvackpack; /* rcvd ack packets */
169 long spps_rcvackbyte; /* bytes acked by rcvd acks */
170 long spps_rcvwinupd; /* rcvd window update packets */
171 };
172 struct spp_istat {
173 short hdrops;
174 short badsum;
175 short badlen;
176 short slotim;
177 short fastim;
178 short nonucn;
179 short noconn;
180 short notme;
181 short wrncon;
182 short bdreas;
183 short gonawy;
184 short notyet;
185 short lstdup;
186 struct sppstat newstats;
187 };
188
189 #ifdef _KERNEL
190 struct spp_istat spp_istat;
191
192 /* Following was struct sppstat sppstat; */
193 #ifndef sppstat
194 #define sppstat spp_istat.newstats
195 #endif
196
197 u_short spp_iss;
198 extern struct sppcb *spp_close(), *spp_disconnect(),
199 *spp_usrclosed(), *spp_timers(), *spp_drop();
200 #endif
201
202 #define SPP_ISSINCR 128
203 /*
204 * SPP sequence numbers are 16 bit integers operated
205 * on with modular arithmetic. These macros can be
206 * used to compare such integers.
207 */
208 #ifdef sun
209 short xnsCbug;
210 #define SSEQ_LT(a,b) ((xnsCbug = (short)((a)-(b))) < 0)
211 #define SSEQ_LEQ(a,b) ((xnsCbug = (short)((a)-(b))) <= 0)
212 #define SSEQ_GT(a,b) ((xnsCbug = (short)((a)-(b))) > 0)
213 #define SSEQ_GEQ(a,b) ((xnsCbug = (short)((a)-(b))) >= 0)
214 #else
215 #define SSEQ_LT(a,b) (((short)((a)-(b))) < 0)
216 #define SSEQ_LEQ(a,b) (((short)((a)-(b))) <= 0)
217 #define SSEQ_GT(a,b) (((short)((a)-(b))) > 0)
218 #define SSEQ_GEQ(a,b) (((short)((a)-(b))) >= 0)
219 #endif
220
221 #endif
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