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1.1 root 1: /*
2: * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
3: *
4: * @APPLE_LICENSE_HEADER_START@
5: *
6: * The contents of this file constitute Original Code as defined in and
7: * are subject to the Apple Public Source License Version 1.1 (the
8: * "License"). You may not use this file except in compliance with the
9: * License. Please obtain a copy of the License at
10: * http://www.apple.com/publicsource and read it before using this file.
11: *
12: * This Original Code and all software distributed under the License are
13: * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
14: * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
15: * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
16: * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
17: * License for the specific language governing rights and limitations
18: * under the License.
19: *
20: * @APPLE_LICENSE_HEADER_END@
21: */
22: /*
23: * Copyright (c) 1984, 1985, 1986, 1987, 1993
24: * The Regents of the University of California. All rights reserved.
25: *
26: * Redistribution and use in source and binary forms, with or without
27: * modification, are permitted provided that the following conditions
28: * are met:
29: * 1. Redistributions of source code must retain the above copyright
30: * notice, this list of conditions and the following disclaimer.
31: * 2. Redistributions in binary form must reproduce the above copyright
32: * notice, this list of conditions and the following disclaimer in the
33: * documentation and/or other materials provided with the distribution.
34: * 3. All advertising materials mentioning features or use of this software
35: * must display the following acknowledgement:
36: * This product includes software developed by the University of
37: * California, Berkeley and its contributors.
38: * 4. Neither the name of the University nor the names of its contributors
39: * may be used to endorse or promote products derived from this software
40: * without specific prior written permission.
41: *
42: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
43: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
44: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
45: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
46: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
47: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
48: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
49: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
50: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
51: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
52: * SUCH DAMAGE.
53: *
54: * @(#)spp_var.h 8.1 (Berkeley) 6/10/93
55: */
56:
57: /*
58: * Sp control block, one per connection
59: */
60: struct sppcb {
61: struct spidp_q s_q; /* queue for out-of-order receipt */
62: struct nspcb *s_nspcb; /* backpointer to internet pcb */
63: u_char s_state;
64: u_char s_flags;
65: #define SF_ACKNOW 0x01 /* Ack peer immediately */
66: #define SF_DELACK 0x02 /* Ack, but try to delay it */
67: #define SF_HI 0x04 /* Show headers on input */
68: #define SF_HO 0x08 /* Show headers on output */
69: #define SF_PI 0x10 /* Packet (datagram) interface */
70: #define SF_WIN 0x20 /* Window info changed */
71: #define SF_RXT 0x40 /* Rxt info changed */
72: #define SF_RVD 0x80 /* Calling from read usrreq routine */
73: u_short s_mtu; /* Max packet size for this stream */
74: /* use sequence fields in headers to store sequence numbers for this
75: connection */
76: struct idp *s_idp;
77: struct sphdr s_shdr; /* prototype header to transmit */
78: #define s_cc s_shdr.sp_cc /* connection control (for EM bit) */
79: #define s_dt s_shdr.sp_dt /* datastream type */
80: #define s_sid s_shdr.sp_sid /* source connection identifier */
81: #define s_did s_shdr.sp_did /* destination connection identifier */
82: #define s_seq s_shdr.sp_seq /* sequence number */
83: #define s_ack s_shdr.sp_ack /* acknowledge number */
84: #define s_alo s_shdr.sp_alo /* allocation number */
85: #define s_dport s_idp->idp_dna.x_port /* where we are sending */
86: struct sphdr s_rhdr; /* last received header (in effect!)*/
87: u_short s_rack; /* their acknowledge number */
88: u_short s_ralo; /* their allocation number */
89: u_short s_smax; /* highest packet # we have sent */
90: u_short s_snxt; /* which packet to send next */
91:
92: /* congestion control */
93: #define CUNIT 1024 /* scaling for ... */
94: int s_cwnd; /* Congestion-controlled window */
95: /* in packets * CUNIT */
96: short s_swnd; /* == tcp snd_wnd, in packets */
97: short s_smxw; /* == tcp max_sndwnd */
98: /* difference of two spp_seq's can be
99: no bigger than a short */
100: u_short s_swl1; /* == tcp snd_wl1 */
101: u_short s_swl2; /* == tcp snd_wl2 */
102: int s_cwmx; /* max allowable cwnd */
103: int s_ssthresh; /* s_cwnd size threshhold for
104: * slow start exponential-to-
105: * linear switch */
106: /* transmit timing stuff
107: * srtt and rttvar are stored as fixed point, for convenience in smoothing.
108: * srtt has 3 bits to the right of the binary point, rttvar has 2.
109: */
110: short s_idle; /* time idle */
111: short s_timer[SPPT_NTIMERS]; /* timers */
112: short s_rxtshift; /* log(2) of rexmt exp. backoff */
113: short s_rxtcur; /* current retransmit value */
114: u_short s_rtseq; /* packet being timed */
115: short s_rtt; /* timer for round trips */
116: short s_srtt; /* averaged timer */
117: short s_rttvar; /* variance in round trip time */
118: char s_force; /* which timer expired */
119: char s_dupacks; /* counter to intuit xmt loss */
120:
121: /* out of band data */
122: char s_oobflags;
123: #define SF_SOOB 0x08 /* sending out of band data */
124: #define SF_IOOB 0x10 /* receiving out of band data */
125: char s_iobc; /* input characters */
126: /* debug stuff */
127: u_short s_want; /* Last candidate for sending */
128: char s_outx; /* exit taken from spp_output */
129: char s_inx; /* exit taken from spp_input */
130: u_short s_flags2; /* more flags for testing */
131: #define SF_NEWCALL 0x100 /* for new_recvmsg */
132: #define SO_NEWCALL 10 /* for new_recvmsg */
133: };
134:
135: #define nstosppcb(np) ((struct sppcb *)(np)->nsp_pcb)
136: #define sotosppcb(so) (nstosppcb(sotonspcb(so)))
137:
138: struct sppstat {
139: long spps_connattempt; /* connections initiated */
140: long spps_accepts; /* connections accepted */
141: long spps_connects; /* connections established */
142: long spps_drops; /* connections dropped */
143: long spps_conndrops; /* embryonic connections dropped */
144: long spps_closed; /* conn. closed (includes drops) */
145: long spps_segstimed; /* segs where we tried to get rtt */
146: long spps_rttupdated; /* times we succeeded */
147: long spps_delack; /* delayed acks sent */
148: long spps_timeoutdrop; /* conn. dropped in rxmt timeout */
149: long spps_rexmttimeo; /* retransmit timeouts */
150: long spps_persisttimeo; /* persist timeouts */
151: long spps_keeptimeo; /* keepalive timeouts */
152: long spps_keepprobe; /* keepalive probes sent */
153: long spps_keepdrops; /* connections dropped in keepalive */
154:
155: long spps_sndtotal; /* total packets sent */
156: long spps_sndpack; /* data packets sent */
157: long spps_sndbyte; /* data bytes sent */
158: long spps_sndrexmitpack; /* data packets retransmitted */
159: long spps_sndrexmitbyte; /* data bytes retransmitted */
160: long spps_sndacks; /* ack-only packets sent */
161: long spps_sndprobe; /* window probes sent */
162: long spps_sndurg; /* packets sent with URG only */
163: long spps_sndwinup; /* window update-only packets sent */
164: long spps_sndctrl; /* control (SYN|FIN|RST) packets sent */
165: long spps_sndvoid; /* couldn't find requested packet*/
166:
167: long spps_rcvtotal; /* total packets received */
168: long spps_rcvpack; /* packets received in sequence */
169: long spps_rcvbyte; /* bytes received in sequence */
170: long spps_rcvbadsum; /* packets received with ccksum errs */
171: long spps_rcvbadoff; /* packets received with bad offset */
172: long spps_rcvshort; /* packets received too short */
173: long spps_rcvduppack; /* duplicate-only packets received */
174: long spps_rcvdupbyte; /* duplicate-only bytes received */
175: long spps_rcvpartduppack; /* packets with some duplicate data */
176: long spps_rcvpartdupbyte; /* dup. bytes in part-dup. packets */
177: long spps_rcvoopack; /* out-of-order packets received */
178: long spps_rcvoobyte; /* out-of-order bytes received */
179: long spps_rcvpackafterwin; /* packets with data after window */
180: long spps_rcvbyteafterwin; /* bytes rcvd after window */
181: long spps_rcvafterclose; /* packets rcvd after "close" */
182: long spps_rcvwinprobe; /* rcvd window probe packets */
183: long spps_rcvdupack; /* rcvd duplicate acks */
184: long spps_rcvacktoomuch; /* rcvd acks for unsent data */
185: long spps_rcvackpack; /* rcvd ack packets */
186: long spps_rcvackbyte; /* bytes acked by rcvd acks */
187: long spps_rcvwinupd; /* rcvd window update packets */
188: };
189: struct spp_istat {
190: short hdrops;
191: short badsum;
192: short badlen;
193: short slotim;
194: short fastim;
195: short nonucn;
196: short noconn;
197: short notme;
198: short wrncon;
199: short bdreas;
200: short gonawy;
201: short notyet;
202: short lstdup;
203: struct sppstat newstats;
204: };
205:
206: #ifdef KERNEL
207: struct spp_istat spp_istat;
208:
209: /* Following was struct sppstat sppstat; */
210: #ifndef sppstat
211: #define sppstat spp_istat.newstats
212: #endif
213:
214: u_short spp_iss;
215: extern struct sppcb *spp_close(), *spp_disconnect(),
216: *spp_usrclosed(), *spp_timers(), *spp_drop();
217: #endif
218:
219: #define SPP_ISSINCR 128
220: /*
221: * SPP sequence numbers are 16 bit integers operated
222: * on with modular arithmetic. These macros can be
223: * used to compare such integers.
224: */
225: #ifdef sun
226: short xnsCbug;
227: #define SSEQ_LT(a,b) ((xnsCbug = (short)((a)-(b))) < 0)
228: #define SSEQ_LEQ(a,b) ((xnsCbug = (short)((a)-(b))) <= 0)
229: #define SSEQ_GT(a,b) ((xnsCbug = (short)((a)-(b))) > 0)
230: #define SSEQ_GEQ(a,b) ((xnsCbug = (short)((a)-(b))) >= 0)
231: #else
232: #define SSEQ_LT(a,b) (((short)((a)-(b))) < 0)
233: #define SSEQ_LEQ(a,b) (((short)((a)-(b))) <= 0)
234: #define SSEQ_GT(a,b) (((short)((a)-(b))) > 0)
235: #define SSEQ_GEQ(a,b) (((short)((a)-(b))) >= 0)
236: #endif
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