tcp_var.h revision 1.117 1 1.117 mycroft /* $NetBSD: tcp_var.h,v 1.117 2005/01/27 03:39:36 mycroft Exp $ */
2 1.61 itojun
3 1.61 itojun /*
4 1.61 itojun * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
5 1.61 itojun * All rights reserved.
6 1.92 itojun *
7 1.61 itojun * Redistribution and use in source and binary forms, with or without
8 1.61 itojun * modification, are permitted provided that the following conditions
9 1.61 itojun * are met:
10 1.61 itojun * 1. Redistributions of source code must retain the above copyright
11 1.61 itojun * notice, this list of conditions and the following disclaimer.
12 1.61 itojun * 2. Redistributions in binary form must reproduce the above copyright
13 1.61 itojun * notice, this list of conditions and the following disclaimer in the
14 1.61 itojun * documentation and/or other materials provided with the distribution.
15 1.61 itojun * 3. Neither the name of the project nor the names of its contributors
16 1.61 itojun * may be used to endorse or promote products derived from this software
17 1.61 itojun * without specific prior written permission.
18 1.92 itojun *
19 1.61 itojun * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
20 1.61 itojun * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 1.61 itojun * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 1.61 itojun * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
23 1.61 itojun * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 1.61 itojun * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 1.61 itojun * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 1.61 itojun * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 1.61 itojun * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 1.61 itojun * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 1.61 itojun * SUCH DAMAGE.
30 1.88 itojun */
31 1.88 itojun
32 1.88 itojun /*
33 1.88 itojun * @(#)COPYRIGHT 1.1 (NRL) 17 January 1995
34 1.92 itojun *
35 1.88 itojun * NRL grants permission for redistribution and use in source and binary
36 1.88 itojun * forms, with or without modification, of the software and documentation
37 1.88 itojun * created at NRL provided that the following conditions are met:
38 1.92 itojun *
39 1.88 itojun * 1. Redistributions of source code must retain the above copyright
40 1.88 itojun * notice, this list of conditions and the following disclaimer.
41 1.88 itojun * 2. Redistributions in binary form must reproduce the above copyright
42 1.88 itojun * notice, this list of conditions and the following disclaimer in the
43 1.88 itojun * documentation and/or other materials provided with the distribution.
44 1.88 itojun * 3. All advertising materials mentioning features or use of this software
45 1.88 itojun * must display the following acknowledgements:
46 1.88 itojun * This product includes software developed by the University of
47 1.88 itojun * California, Berkeley and its contributors.
48 1.88 itojun * This product includes software developed at the Information
49 1.88 itojun * Technology Division, US Naval Research Laboratory.
50 1.88 itojun * 4. Neither the name of the NRL nor the names of its contributors
51 1.88 itojun * may be used to endorse or promote products derived from this software
52 1.88 itojun * without specific prior written permission.
53 1.92 itojun *
54 1.88 itojun * THE SOFTWARE PROVIDED BY NRL IS PROVIDED BY NRL AND CONTRIBUTORS ``AS
55 1.88 itojun * IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
56 1.88 itojun * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
57 1.88 itojun * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL NRL OR
58 1.88 itojun * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
59 1.88 itojun * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
60 1.88 itojun * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
61 1.88 itojun * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
62 1.88 itojun * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
63 1.88 itojun * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
64 1.88 itojun * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
65 1.92 itojun *
66 1.88 itojun * The views and conclusions contained in the software and documentation
67 1.88 itojun * are those of the authors and should not be interpreted as representing
68 1.88 itojun * official policies, either expressed or implied, of the US Naval
69 1.88 itojun * Research Laboratory (NRL).
70 1.61 itojun */
71 1.35 thorpej
72 1.35 thorpej /*-
73 1.78 thorpej * Copyright (c) 1997, 1998, 1999, 2001 The NetBSD Foundation, Inc.
74 1.35 thorpej * All rights reserved.
75 1.35 thorpej *
76 1.35 thorpej * This code is derived from software contributed to The NetBSD Foundation
77 1.35 thorpej * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
78 1.35 thorpej * NASA Ames Research Center.
79 1.35 thorpej *
80 1.35 thorpej * Redistribution and use in source and binary forms, with or without
81 1.35 thorpej * modification, are permitted provided that the following conditions
82 1.35 thorpej * are met:
83 1.35 thorpej * 1. Redistributions of source code must retain the above copyright
84 1.35 thorpej * notice, this list of conditions and the following disclaimer.
85 1.35 thorpej * 2. Redistributions in binary form must reproduce the above copyright
86 1.35 thorpej * notice, this list of conditions and the following disclaimer in the
87 1.35 thorpej * documentation and/or other materials provided with the distribution.
88 1.35 thorpej * 3. All advertising materials mentioning features or use of this software
89 1.35 thorpej * must display the following acknowledgement:
90 1.35 thorpej * This product includes software developed by the NetBSD
91 1.35 thorpej * Foundation, Inc. and its contributors.
92 1.35 thorpej * 4. Neither the name of The NetBSD Foundation nor the names of its
93 1.35 thorpej * contributors may be used to endorse or promote products derived
94 1.35 thorpej * from this software without specific prior written permission.
95 1.35 thorpej *
96 1.35 thorpej * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
97 1.35 thorpej * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
98 1.35 thorpej * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
99 1.35 thorpej * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
100 1.35 thorpej * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
101 1.35 thorpej * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
102 1.35 thorpej * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
103 1.35 thorpej * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
104 1.35 thorpej * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
105 1.35 thorpej * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
106 1.35 thorpej * POSSIBILITY OF SUCH DAMAGE.
107 1.35 thorpej */
108 1.9 cgd
109 1.1 cgd /*
110 1.33 thorpej * Copyright (c) 1982, 1986, 1993, 1994, 1995
111 1.8 mycroft * The Regents of the University of California. All rights reserved.
112 1.1 cgd *
113 1.1 cgd * Redistribution and use in source and binary forms, with or without
114 1.1 cgd * modification, are permitted provided that the following conditions
115 1.1 cgd * are met:
116 1.1 cgd * 1. Redistributions of source code must retain the above copyright
117 1.1 cgd * notice, this list of conditions and the following disclaimer.
118 1.1 cgd * 2. Redistributions in binary form must reproduce the above copyright
119 1.1 cgd * notice, this list of conditions and the following disclaimer in the
120 1.1 cgd * documentation and/or other materials provided with the distribution.
121 1.104 agc * 3. Neither the name of the University nor the names of its contributors
122 1.1 cgd * may be used to endorse or promote products derived from this software
123 1.1 cgd * without specific prior written permission.
124 1.1 cgd *
125 1.1 cgd * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
126 1.1 cgd * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
127 1.1 cgd * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
128 1.1 cgd * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
129 1.1 cgd * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
130 1.1 cgd * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
131 1.1 cgd * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
132 1.1 cgd * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
133 1.1 cgd * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
134 1.1 cgd * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
135 1.1 cgd * SUCH DAMAGE.
136 1.1 cgd *
137 1.33 thorpej * @(#)tcp_var.h 8.4 (Berkeley) 5/24/95
138 1.1 cgd */
139 1.1 cgd
140 1.34 perry #ifndef _NETINET_TCP_VAR_H_
141 1.34 perry #define _NETINET_TCP_VAR_H_
142 1.62 thorpej
143 1.81 mrg #if defined(_KERNEL_OPT)
144 1.62 thorpej #include "opt_inet.h"
145 1.98 martin #include "opt_mbuftrace.h"
146 1.65 itojun #endif
147 1.34 perry
148 1.1 cgd /*
149 1.1 cgd * Kernel variables for tcp.
150 1.1 cgd */
151 1.1 cgd
152 1.83 thorpej #include <sys/callout.h>
153 1.83 thorpej
154 1.110 jonathan #ifdef TCP_SIGNATURE
155 1.110 jonathan /*
156 1.110 jonathan * Defines which are needed by the xform_tcp module and tcp_[in|out]put
157 1.110 jonathan * for SADB verification and lookup.
158 1.110 jonathan */
159 1.110 jonathan #define TCP_SIGLEN 16 /* length of computed digest in bytes */
160 1.110 jonathan #define TCP_KEYLEN_MIN 1 /* minimum length of TCP-MD5 key */
161 1.110 jonathan #define TCP_KEYLEN_MAX 80 /* maximum length of TCP-MD5 key */
162 1.110 jonathan /*
163 1.110 jonathan * Only a single SA per host may be specified at this time. An SPI is
164 1.110 jonathan * needed in order for the KEY_ALLOCSA() lookup to work.
165 1.110 jonathan */
166 1.110 jonathan #define TCP_SIG_SPI 0x1000
167 1.110 jonathan #endif /* TCP_SIGNATURE */
168 1.110 jonathan
169 1.1 cgd /*
170 1.1 cgd * Tcp control block, one per tcp; fields:
171 1.1 cgd */
172 1.1 cgd struct tcpcb {
173 1.61 itojun int t_family; /* address family on the wire */
174 1.15 cgd struct ipqehead segq; /* sequencing queue */
175 1.86 thorpej struct callout t_timer[TCPT_NTIMERS];/* tcp timers */
176 1.1 cgd short t_state; /* state of this connection */
177 1.1 cgd short t_rxtshift; /* log(2) of rexmt exp. backoff */
178 1.84 thorpej uint32_t t_rxtcur; /* current retransmit value */
179 1.1 cgd short t_dupacks; /* consecutive dup acks recd */
180 1.117 mycroft short t_partialacks; /* partials acks during fast rexmit */
181 1.26 kml u_short t_peermss; /* peer's maximum segment size */
182 1.23 thorpej u_short t_ourmss; /* our's maximum segment size */
183 1.26 kml u_short t_segsz; /* current segment size in use */
184 1.1 cgd char t_force; /* 1 if forcing out a byte */
185 1.80 matt u_int t_flags;
186 1.8 mycroft #define TF_ACKNOW 0x0001 /* ack peer immediately */
187 1.8 mycroft #define TF_DELACK 0x0002 /* ack, but try to delay it */
188 1.8 mycroft #define TF_NODELAY 0x0004 /* don't delay packets to coalesce */
189 1.8 mycroft #define TF_NOOPT 0x0008 /* don't use tcp options */
190 1.8 mycroft #define TF_REQ_SCALE 0x0020 /* have/will request window scaling */
191 1.8 mycroft #define TF_RCVD_SCALE 0x0040 /* other side has requested scaling */
192 1.8 mycroft #define TF_REQ_TSTMP 0x0080 /* have/will request timestamps */
193 1.8 mycroft #define TF_RCVD_TSTMP 0x0100 /* a timestamp was received in SYN */
194 1.8 mycroft #define TF_SACK_PERMIT 0x0200 /* other side said I could SACK */
195 1.37 thorpej #define TF_SYN_REXMT 0x0400 /* rexmit timer fired on SYN */
196 1.43 matt #define TF_WILL_SACK 0x0800 /* try to use SACK */
197 1.43 matt #define TF_CANT_TXSACK 0x1000 /* other side said I could not SACK */
198 1.43 matt #define TF_IGNR_RXSACK 0x2000 /* ignore received SACK blocks */
199 1.56 thorpej #define TF_REASSEMBLING 0x4000 /* we're busy reassembling */
200 1.103 he #define TF_DEAD 0x8000 /* dead and to-be-released */
201 1.110 jonathan #define TF_SIGNATURE 0x400000 /* require MD5 digests (RFC2385) */
202 1.43 matt
203 1.8 mycroft
204 1.61 itojun struct mbuf *t_template; /* skeletal packet for transmit */
205 1.1 cgd struct inpcb *t_inpcb; /* back pointer to internet pcb */
206 1.61 itojun struct in6pcb *t_in6pcb; /* back pointer to internet pcb */
207 1.83 thorpej struct callout t_delack_ch; /* delayed ACK callout */
208 1.1 cgd /*
209 1.1 cgd * The following fields are used as in the protocol specification.
210 1.1 cgd * See RFC783, Dec. 1981, page 21.
211 1.1 cgd */
212 1.1 cgd /* send sequence variables */
213 1.1 cgd tcp_seq snd_una; /* send unacknowledged */
214 1.1 cgd tcp_seq snd_nxt; /* send next */
215 1.1 cgd tcp_seq snd_up; /* send urgent pointer */
216 1.1 cgd tcp_seq snd_wl1; /* window update seg seq number */
217 1.1 cgd tcp_seq snd_wl2; /* window update seg ack number */
218 1.1 cgd tcp_seq iss; /* initial send sequence number */
219 1.8 mycroft u_long snd_wnd; /* send window */
220 1.54 matt tcp_seq snd_recover; /* for use in fast recovery */
221 1.117 mycroft tcp_seq snd_high; /* NewReno false fast rexmit seq */
222 1.1 cgd /* receive sequence variables */
223 1.8 mycroft u_long rcv_wnd; /* receive window */
224 1.1 cgd tcp_seq rcv_nxt; /* receive next */
225 1.1 cgd tcp_seq rcv_up; /* receive urgent pointer */
226 1.1 cgd tcp_seq irs; /* initial receive sequence number */
227 1.1 cgd /*
228 1.1 cgd * Additional variables for this implementation.
229 1.1 cgd */
230 1.1 cgd /* receive variables */
231 1.1 cgd tcp_seq rcv_adv; /* advertised window */
232 1.1 cgd /* retransmit variables */
233 1.1 cgd tcp_seq snd_max; /* highest sequence number sent;
234 1.1 cgd * used to recognize retransmits
235 1.1 cgd */
236 1.1 cgd /* congestion control (for slow start, source quench, retransmit after loss) */
237 1.8 mycroft u_long snd_cwnd; /* congestion-controlled window */
238 1.8 mycroft u_long snd_ssthresh; /* snd_cwnd size threshhold for
239 1.1 cgd * for slow start exponential to
240 1.1 cgd * linear switch
241 1.1 cgd */
242 1.1 cgd /*
243 1.1 cgd * transmit timing stuff. See below for scale of srtt and rttvar.
244 1.1 cgd * "Variance" is actually smoothed difference.
245 1.1 cgd */
246 1.84 thorpej uint32_t t_rcvtime; /* time last segment received */
247 1.84 thorpej uint32_t t_rtttime; /* time we started measuring rtt */
248 1.1 cgd tcp_seq t_rtseq; /* sequence number being timed */
249 1.84 thorpej int32_t t_srtt; /* smoothed round-trip time */
250 1.84 thorpej int32_t t_rttvar; /* variance in round-trip time */
251 1.84 thorpej uint32_t t_rttmin; /* minimum rtt allowed */
252 1.8 mycroft u_long max_sndwnd; /* largest window peer has offered */
253 1.1 cgd
254 1.1 cgd /* out-of-band data */
255 1.1 cgd char t_oobflags; /* have some */
256 1.1 cgd char t_iobc; /* input character */
257 1.1 cgd #define TCPOOB_HAVEDATA 0x01
258 1.1 cgd #define TCPOOB_HADDATA 0x02
259 1.1 cgd short t_softerror; /* possible error not yet reported */
260 1.8 mycroft
261 1.8 mycroft /* RFC 1323 variables */
262 1.8 mycroft u_char snd_scale; /* window scaling for send window */
263 1.8 mycroft u_char rcv_scale; /* window scaling for recv window */
264 1.8 mycroft u_char request_r_scale; /* pending window scaling */
265 1.8 mycroft u_char requested_s_scale;
266 1.11 cgd u_int32_t ts_recent; /* timestamp echo data */
267 1.43 matt u_int32_t ts_recent_age; /* when last updated */
268 1.78 thorpej u_int32_t ts_timebase; /* our timebase */
269 1.8 mycroft tcp_seq last_ack_sent;
270 1.8 mycroft
271 1.43 matt /* SACK stuff */
272 1.43 matt struct ipqehead timeq; /* time sequenced queue (for SACK) */
273 1.67 itojun
274 1.91 itojun /* path MTU discovery blackhole detection */
275 1.91 itojun int t_mtudisc; /* perform mtudisc for this tcb */
276 1.91 itojun
277 1.67 itojun /* pointer for syn cache entries*/
278 1.67 itojun LIST_HEAD(, syn_cache) t_sc; /* list of entries by this tcb */
279 1.101 ragge
280 1.101 ragge /* prediction of next mbuf when using large window sizes */
281 1.101 ragge struct mbuf *t_lastm; /* last mbuf that data was sent from */
282 1.101 ragge int t_inoff; /* data offset in previous mbuf */
283 1.101 ragge int t_lastoff; /* last data address in mbuf chain */
284 1.101 ragge int t_lastlen; /* last length read from mbuf chain */
285 1.1 cgd };
286 1.56 thorpej
287 1.56 thorpej #ifdef _KERNEL
288 1.56 thorpej /*
289 1.56 thorpej * TCP reassembly queue locks.
290 1.56 thorpej */
291 1.107 matt static __inline int tcp_reass_lock_try (struct tcpcb *)
292 1.56 thorpej __attribute__((__unused__));
293 1.107 matt static __inline void tcp_reass_unlock (struct tcpcb *)
294 1.56 thorpej __attribute__((__unused__));
295 1.56 thorpej
296 1.56 thorpej static __inline int
297 1.56 thorpej tcp_reass_lock_try(tp)
298 1.56 thorpej struct tcpcb *tp;
299 1.56 thorpej {
300 1.56 thorpej int s;
301 1.56 thorpej
302 1.79 thorpej /*
303 1.79 thorpej * Use splvm() -- we're blocking things that would cause
304 1.79 thorpej * mbuf allocation.
305 1.79 thorpej */
306 1.79 thorpej s = splvm();
307 1.56 thorpej if (tp->t_flags & TF_REASSEMBLING) {
308 1.56 thorpej splx(s);
309 1.56 thorpej return (0);
310 1.56 thorpej }
311 1.56 thorpej tp->t_flags |= TF_REASSEMBLING;
312 1.56 thorpej splx(s);
313 1.56 thorpej return (1);
314 1.56 thorpej }
315 1.56 thorpej
316 1.56 thorpej static __inline void
317 1.56 thorpej tcp_reass_unlock(tp)
318 1.56 thorpej struct tcpcb *tp;
319 1.56 thorpej {
320 1.56 thorpej int s;
321 1.56 thorpej
322 1.79 thorpej s = splvm();
323 1.56 thorpej tp->t_flags &= ~TF_REASSEMBLING;
324 1.56 thorpej splx(s);
325 1.56 thorpej }
326 1.56 thorpej
327 1.56 thorpej #ifdef DIAGNOSTIC
328 1.56 thorpej #define TCP_REASS_LOCK(tp) \
329 1.56 thorpej do { \
330 1.56 thorpej if (tcp_reass_lock_try(tp) == 0) { \
331 1.56 thorpej printf("%s:%d: tcpcb %p reass already locked\n", \
332 1.56 thorpej __FILE__, __LINE__, tp); \
333 1.56 thorpej panic("tcp_reass_lock"); \
334 1.56 thorpej } \
335 1.94 perry } while (/*CONSTCOND*/ 0)
336 1.56 thorpej #define TCP_REASS_LOCK_CHECK(tp) \
337 1.56 thorpej do { \
338 1.56 thorpej if (((tp)->t_flags & TF_REASSEMBLING) == 0) { \
339 1.56 thorpej printf("%s:%d: tcpcb %p reass lock not held\n", \
340 1.56 thorpej __FILE__, __LINE__, tp); \
341 1.56 thorpej panic("tcp reass lock check"); \
342 1.56 thorpej } \
343 1.94 perry } while (/*CONSTCOND*/ 0)
344 1.56 thorpej #else
345 1.56 thorpej #define TCP_REASS_LOCK(tp) (void) tcp_reass_lock_try((tp))
346 1.56 thorpej #define TCP_REASS_LOCK_CHECK(tp) /* nothing */
347 1.56 thorpej #endif
348 1.56 thorpej
349 1.56 thorpej #define TCP_REASS_UNLOCK(tp) tcp_reass_unlock((tp))
350 1.56 thorpej #endif /* _KERNEL */
351 1.32 thorpej
352 1.32 thorpej /*
353 1.32 thorpej * Queue for delayed ACK processing.
354 1.32 thorpej */
355 1.32 thorpej #ifdef _KERNEL
356 1.83 thorpej extern int tcp_delack_ticks;
357 1.83 thorpej void tcp_delack(void *);
358 1.83 thorpej
359 1.83 thorpej #define TCP_RESTART_DELACK(tp) \
360 1.83 thorpej callout_reset(&(tp)->t_delack_ch, tcp_delack_ticks, \
361 1.83 thorpej tcp_delack, tp)
362 1.32 thorpej
363 1.83 thorpej #define TCP_SET_DELACK(tp) \
364 1.83 thorpej do { \
365 1.83 thorpej if (((tp)->t_flags & TF_DELACK) == 0) { \
366 1.83 thorpej (tp)->t_flags |= TF_DELACK; \
367 1.83 thorpej TCP_RESTART_DELACK(tp); \
368 1.83 thorpej } \
369 1.83 thorpej } while (/*CONSTCOND*/0)
370 1.32 thorpej
371 1.83 thorpej #define TCP_CLEAR_DELACK(tp) \
372 1.83 thorpej do { \
373 1.83 thorpej if ((tp)->t_flags & TF_DELACK) { \
374 1.83 thorpej (tp)->t_flags &= ~TF_DELACK; \
375 1.83 thorpej callout_stop(&(tp)->t_delack_ch); \
376 1.83 thorpej } \
377 1.83 thorpej } while (/*CONSTCOND*/0)
378 1.32 thorpej #endif /* _KERNEL */
379 1.1 cgd
380 1.20 thorpej /*
381 1.78 thorpej * Compute the current timestamp for a connection.
382 1.78 thorpej */
383 1.78 thorpej #define TCP_TIMESTAMP(tp) (tcp_now - (tp)->ts_timebase)
384 1.78 thorpej
385 1.78 thorpej /*
386 1.20 thorpej * Handy way of passing around TCP option info.
387 1.20 thorpej */
388 1.20 thorpej struct tcp_opt_info {
389 1.20 thorpej int ts_present;
390 1.20 thorpej u_int32_t ts_val;
391 1.20 thorpej u_int32_t ts_ecr;
392 1.20 thorpej u_int16_t maxseg;
393 1.20 thorpej };
394 1.20 thorpej
395 1.110 jonathan #define TOF_SIGNATURE 0x0040 /* signature option present */
396 1.110 jonathan #define TOF_SIGLEN 0x0080 /* sigature length valid (RFC2385) */
397 1.110 jonathan
398 1.20 thorpej /*
399 1.38 thorpej * Data for the TCP compressed state engine.
400 1.20 thorpej */
401 1.61 itojun union syn_cache_sa {
402 1.61 itojun struct sockaddr sa;
403 1.61 itojun struct sockaddr_in sin;
404 1.61 itojun #if 1 /*def INET6*/
405 1.61 itojun struct sockaddr_in6 sin6;
406 1.61 itojun #endif
407 1.61 itojun };
408 1.61 itojun
409 1.20 thorpej struct syn_cache {
410 1.87 thorpej TAILQ_ENTRY(syn_cache) sc_bucketq; /* link on bucket list */
411 1.87 thorpej struct callout sc_timer; /* rexmt timer */
412 1.61 itojun union { /* cached route */
413 1.61 itojun struct route route4;
414 1.61 itojun #ifdef INET6
415 1.61 itojun struct route_in6 route6;
416 1.61 itojun #endif
417 1.61 itojun } sc_route_u;
418 1.61 itojun #define sc_route4 sc_route_u.route4
419 1.61 itojun #ifdef INET6
420 1.61 itojun #define sc_route6 sc_route_u.route6
421 1.61 itojun #endif
422 1.59 thorpej long sc_win; /* advertised window */
423 1.59 thorpej int sc_bucketidx; /* our bucket index */
424 1.39 thorpej u_int32_t sc_hash;
425 1.59 thorpej u_int32_t sc_timestamp; /* timestamp from SYN */
426 1.78 thorpej u_int32_t sc_timebase; /* our local timebase */
427 1.61 itojun union syn_cache_sa sc_src;
428 1.61 itojun union syn_cache_sa sc_dst;
429 1.20 thorpej tcp_seq sc_irs;
430 1.20 thorpej tcp_seq sc_iss;
431 1.59 thorpej u_int sc_rxtcur; /* current rxt timeout */
432 1.59 thorpej u_int sc_rxttot; /* total time spend on queues */
433 1.59 thorpej u_short sc_rxtshift; /* for computing backoff */
434 1.52 thorpej u_short sc_flags;
435 1.37 thorpej
436 1.52 thorpej #define SCF_UNREACH 0x0001 /* we've had an unreach error */
437 1.39 thorpej #define SCF_TIMESTAMP 0x0002 /* peer will do timestamps */
438 1.103 he #define SCF_DEAD 0x0004 /* this entry to be released */
439 1.110 jonathan #define SCF_SIGNATURE 0x40 /* send MD5 digests */
440 1.37 thorpej
441 1.40 thorpej struct mbuf *sc_ipopts; /* IP options */
442 1.20 thorpej u_int16_t sc_peermaxseg;
443 1.23 thorpej u_int16_t sc_ourmaxseg;
444 1.20 thorpej u_int8_t sc_request_r_scale : 4,
445 1.20 thorpej sc_requested_s_scale : 4;
446 1.67 itojun
447 1.67 itojun struct tcpcb *sc_tp; /* tcb for listening socket */
448 1.67 itojun LIST_ENTRY(syn_cache) sc_tpq; /* list of entries by same tp */
449 1.20 thorpej };
450 1.20 thorpej
451 1.20 thorpej struct syn_cache_head {
452 1.87 thorpej TAILQ_HEAD(, syn_cache) sch_bucket; /* bucket entries */
453 1.49 thorpej u_short sch_length; /* # entries in bucket */
454 1.20 thorpej };
455 1.20 thorpej
456 1.1 cgd #define intotcpcb(ip) ((struct tcpcb *)(ip)->inp_ppcb)
457 1.61 itojun #ifdef INET6
458 1.61 itojun #define in6totcpcb(ip) ((struct tcpcb *)(ip)->in6p_ppcb)
459 1.61 itojun #endif
460 1.61 itojun #ifndef INET6
461 1.1 cgd #define sototcpcb(so) (intotcpcb(sotoinpcb(so)))
462 1.61 itojun #else
463 1.66 itojun #define sototcpcb(so) (((so)->so_proto->pr_domain->dom_family == AF_INET) \
464 1.66 itojun ? intotcpcb(sotoinpcb(so)) \
465 1.66 itojun : in6totcpcb(sotoin6pcb(so)))
466 1.61 itojun #endif
467 1.1 cgd
468 1.1 cgd /*
469 1.1 cgd * The smoothed round-trip time and estimated variance
470 1.1 cgd * are stored as fixed point numbers scaled by the values below.
471 1.1 cgd * For convenience, these scales are also used in smoothing the average
472 1.1 cgd * (smoothed = (1/scale)sample + ((scale-1)/scale)smoothed).
473 1.1 cgd * With these scales, srtt has 3 bits to the right of the binary point,
474 1.1 cgd * and thus an "ALPHA" of 0.875. rttvar has 2 bits to the right of the
475 1.1 cgd * binary point, and is smoothed with an ALPHA of 0.75.
476 1.1 cgd */
477 1.1 cgd #define TCP_RTT_SHIFT 3 /* shift for srtt; 3 bits frac. */
478 1.1 cgd #define TCP_RTTVAR_SHIFT 2 /* multiplier for rttvar; 2 bits */
479 1.1 cgd
480 1.1 cgd /*
481 1.1 cgd * The initial retransmission should happen at rtt + 4 * rttvar.
482 1.1 cgd * Because of the way we do the smoothing, srtt and rttvar
483 1.1 cgd * will each average +1/2 tick of bias. When we compute
484 1.1 cgd * the retransmit timer, we want 1/2 tick of rounding and
485 1.1 cgd * 1 extra tick because of +-1/2 tick uncertainty in the
486 1.1 cgd * firing of the timer. The bias will give us exactly the
487 1.1 cgd * 1.5 tick we need. But, because the bias is
488 1.1 cgd * statistical, we have to test that we don't drop below
489 1.1 cgd * the minimum feasible timer (which is 2 ticks).
490 1.19 mycroft * This macro assumes that the value of 1<<TCP_RTTVAR_SHIFT
491 1.1 cgd * is the same as the multiplier for rttvar.
492 1.1 cgd */
493 1.1 cgd #define TCP_REXMTVAL(tp) \
494 1.12 mycroft ((((tp)->t_srtt >> TCP_RTT_SHIFT) + (tp)->t_rttvar) >> 2)
495 1.1 cgd
496 1.29 thorpej /*
497 1.29 thorpej * Compute the initial window for slow start.
498 1.29 thorpej */
499 1.37 thorpej #define TCP_INITIAL_WINDOW(iw, segsz) \
500 1.37 thorpej (((iw) == 0) ? (min(4 * (segsz), max(2 * (segsz), 4380))) : \
501 1.37 thorpej ((segsz) * (iw)))
502 1.29 thorpej
503 1.1 cgd /*
504 1.1 cgd * TCP statistics.
505 1.1 cgd * Many of these should be kept per connection,
506 1.1 cgd * but that's inconvenient at the moment.
507 1.1 cgd */
508 1.1 cgd struct tcpstat {
509 1.69 bouyer u_quad_t tcps_connattempt; /* connections initiated */
510 1.69 bouyer u_quad_t tcps_accepts; /* connections accepted */
511 1.69 bouyer u_quad_t tcps_connects; /* connections established */
512 1.69 bouyer u_quad_t tcps_drops; /* connections dropped */
513 1.69 bouyer u_quad_t tcps_conndrops; /* embryonic connections dropped */
514 1.69 bouyer u_quad_t tcps_closed; /* conn. closed (includes drops) */
515 1.69 bouyer u_quad_t tcps_segstimed; /* segs where we tried to get rtt */
516 1.69 bouyer u_quad_t tcps_rttupdated; /* times we succeeded */
517 1.69 bouyer u_quad_t tcps_delack; /* delayed acks sent */
518 1.69 bouyer u_quad_t tcps_timeoutdrop; /* conn. dropped in rxmt timeout */
519 1.69 bouyer u_quad_t tcps_rexmttimeo; /* retransmit timeouts */
520 1.69 bouyer u_quad_t tcps_persisttimeo; /* persist timeouts */
521 1.69 bouyer u_quad_t tcps_keeptimeo; /* keepalive timeouts */
522 1.69 bouyer u_quad_t tcps_keepprobe; /* keepalive probes sent */
523 1.69 bouyer u_quad_t tcps_keepdrops; /* connections dropped in keepalive */
524 1.69 bouyer u_quad_t tcps_persistdrops; /* connections dropped in persist */
525 1.69 bouyer u_quad_t tcps_connsdrained; /* connections drained due to memory
526 1.27 thorpej shortage */
527 1.91 itojun u_quad_t tcps_pmtublackhole; /* PMTUD blackhole detected */
528 1.1 cgd
529 1.69 bouyer u_quad_t tcps_sndtotal; /* total packets sent */
530 1.69 bouyer u_quad_t tcps_sndpack; /* data packets sent */
531 1.69 bouyer u_quad_t tcps_sndbyte; /* data bytes sent */
532 1.69 bouyer u_quad_t tcps_sndrexmitpack; /* data packets retransmitted */
533 1.69 bouyer u_quad_t tcps_sndrexmitbyte; /* data bytes retransmitted */
534 1.69 bouyer u_quad_t tcps_sndacks; /* ack-only packets sent */
535 1.69 bouyer u_quad_t tcps_sndprobe; /* window probes sent */
536 1.69 bouyer u_quad_t tcps_sndurg; /* packets sent with URG only */
537 1.69 bouyer u_quad_t tcps_sndwinup; /* window update-only packets sent */
538 1.69 bouyer u_quad_t tcps_sndctrl; /* control (SYN|FIN|RST) packets sent */
539 1.69 bouyer
540 1.69 bouyer u_quad_t tcps_rcvtotal; /* total packets received */
541 1.69 bouyer u_quad_t tcps_rcvpack; /* packets received in sequence */
542 1.69 bouyer u_quad_t tcps_rcvbyte; /* bytes received in sequence */
543 1.69 bouyer u_quad_t tcps_rcvbadsum; /* packets received with ccksum errs */
544 1.69 bouyer u_quad_t tcps_rcvbadoff; /* packets received with bad offset */
545 1.69 bouyer u_quad_t tcps_rcvmemdrop; /* packets dropped for lack of memory */
546 1.69 bouyer u_quad_t tcps_rcvshort; /* packets received too short */
547 1.69 bouyer u_quad_t tcps_rcvduppack; /* duplicate-only packets received */
548 1.69 bouyer u_quad_t tcps_rcvdupbyte; /* duplicate-only bytes received */
549 1.69 bouyer u_quad_t tcps_rcvpartduppack; /* packets with some duplicate data */
550 1.69 bouyer u_quad_t tcps_rcvpartdupbyte; /* dup. bytes in part-dup. packets */
551 1.69 bouyer u_quad_t tcps_rcvoopack; /* out-of-order packets received */
552 1.69 bouyer u_quad_t tcps_rcvoobyte; /* out-of-order bytes received */
553 1.69 bouyer u_quad_t tcps_rcvpackafterwin; /* packets with data after window */
554 1.69 bouyer u_quad_t tcps_rcvbyteafterwin; /* bytes rcvd after window */
555 1.69 bouyer u_quad_t tcps_rcvafterclose; /* packets rcvd after "close" */
556 1.69 bouyer u_quad_t tcps_rcvwinprobe; /* rcvd window probe packets */
557 1.69 bouyer u_quad_t tcps_rcvdupack; /* rcvd duplicate acks */
558 1.69 bouyer u_quad_t tcps_rcvacktoomuch; /* rcvd acks for unsent data */
559 1.69 bouyer u_quad_t tcps_rcvackpack; /* rcvd ack packets */
560 1.69 bouyer u_quad_t tcps_rcvackbyte; /* bytes acked by rcvd acks */
561 1.69 bouyer u_quad_t tcps_rcvwinupd; /* rcvd window update packets */
562 1.69 bouyer u_quad_t tcps_pawsdrop; /* segments dropped due to PAWS */
563 1.69 bouyer u_quad_t tcps_predack; /* times hdr predict ok for acks */
564 1.69 bouyer u_quad_t tcps_preddat; /* times hdr predict ok for data pkts */
565 1.69 bouyer
566 1.69 bouyer u_quad_t tcps_pcbhashmiss; /* input packets missing pcb hash */
567 1.69 bouyer u_quad_t tcps_noport; /* no socket on port */
568 1.69 bouyer u_quad_t tcps_badsyn; /* received ack for which we have
569 1.20 thorpej no SYN in compressed state */
570 1.103 he u_quad_t tcps_delayed_free; /* delayed pool_put() of tcpcb */
571 1.20 thorpej
572 1.20 thorpej /* These statistics deal with the SYN cache. */
573 1.69 bouyer u_quad_t tcps_sc_added; /* # of entries added */
574 1.69 bouyer u_quad_t tcps_sc_completed; /* # of connections completed */
575 1.69 bouyer u_quad_t tcps_sc_timed_out; /* # of entries timed out */
576 1.69 bouyer u_quad_t tcps_sc_overflowed; /* # dropped due to overflow */
577 1.69 bouyer u_quad_t tcps_sc_reset; /* # dropped due to RST */
578 1.69 bouyer u_quad_t tcps_sc_unreach; /* # dropped due to ICMP unreach */
579 1.69 bouyer u_quad_t tcps_sc_bucketoverflow;/* # dropped due to bucket overflow */
580 1.69 bouyer u_quad_t tcps_sc_aborted; /* # of entries aborted (no mem) */
581 1.69 bouyer u_quad_t tcps_sc_dupesyn; /* # of duplicate SYNs received */
582 1.69 bouyer u_quad_t tcps_sc_dropped; /* # of SYNs dropped (no route/mem) */
583 1.69 bouyer u_quad_t tcps_sc_collisions; /* # of hash collisions */
584 1.69 bouyer u_quad_t tcps_sc_retransmitted; /* # of retransmissions */
585 1.103 he u_quad_t tcps_sc_delayed_free; /* # of delayed pool_put()s */
586 1.82 thorpej
587 1.82 thorpej u_quad_t tcps_selfquench; /* # of ENOBUFS we get on output */
588 1.112 itojun u_quad_t tcps_badsig; /* # of drops due to bad signature */
589 1.112 itojun u_quad_t tcps_goodsig; /* # of packets with good signature */
590 1.1 cgd };
591 1.1 cgd
592 1.14 thorpej /*
593 1.14 thorpej * Names for TCP sysctl objects.
594 1.14 thorpej */
595 1.21 thorpej #define TCPCTL_RFC1323 1 /* RFC1323 timestamps/scaling */
596 1.21 thorpej #define TCPCTL_SENDSPACE 2 /* default send buffer */
597 1.21 thorpej #define TCPCTL_RECVSPACE 3 /* default recv buffer */
598 1.21 thorpej #define TCPCTL_MSSDFLT 4 /* default seg size */
599 1.21 thorpej #define TCPCTL_SYN_CACHE_LIMIT 5 /* max size of comp. state engine */
600 1.21 thorpej #define TCPCTL_SYN_BUCKET_LIMIT 6 /* max size of hash bucket */
601 1.87 thorpej #if 0 /*obsoleted*/
602 1.21 thorpej #define TCPCTL_SYN_CACHE_INTER 7 /* interval of comp. state timer */
603 1.87 thorpej #endif
604 1.29 thorpej #define TCPCTL_INIT_WIN 8 /* initial window */
605 1.41 kml #define TCPCTL_MSS_IFMTU 9 /* mss from interface, not in_maxmtu */
606 1.43 matt #define TCPCTL_SACK 10 /* RFC2018 selective acknowledgement */
607 1.43 matt #define TCPCTL_WSCALE 11 /* RFC1323 window scaling */
608 1.43 matt #define TCPCTL_TSTAMP 12 /* RFC1323 timestamps */
609 1.44 thorpej #define TCPCTL_COMPAT_42 13 /* 4.2BSD TCP bug work-arounds */
610 1.45 thorpej #define TCPCTL_CWM 14 /* Congestion Window Monitoring */
611 1.45 thorpej #define TCPCTL_CWM_BURSTSIZE 15 /* burst size allowed by CWM */
612 1.47 thorpej #define TCPCTL_ACK_ON_PUSH 16 /* ACK immediately on PUSH */
613 1.53 mouse #define TCPCTL_KEEPIDLE 17 /* keepalive idle time */
614 1.53 mouse #define TCPCTL_KEEPINTVL 18 /* keepalive probe interval */
615 1.53 mouse #define TCPCTL_KEEPCNT 19 /* keepalive count */
616 1.53 mouse #define TCPCTL_SLOWHZ 20 /* PR_SLOWHZ (read-only) */
617 1.55 matt #define TCPCTL_NEWRENO 21 /* NewReno Congestion Control */
618 1.60 ad #define TCPCTL_LOG_REFUSED 22 /* Log refused connections */
619 1.74 itojun #if 0 /*obsoleted*/
620 1.72 thorpej #define TCPCTL_RSTRATELIMIT 23 /* RST rate limit */
621 1.74 itojun #endif
622 1.73 itojun #define TCPCTL_RSTPPSLIMIT 24 /* RST pps limit */
623 1.83 thorpej #define TCPCTL_DELACK_TICKS 25 /* # ticks to delay ACK */
624 1.96 thorpej #define TCPCTL_INIT_WIN_LOCAL 26 /* initial window for local nets */
625 1.97 christos #define TCPCTL_IDENT 27 /* rfc 931 identd */
626 1.108 itojun #define TCPCTL_ACKDROPRATELIMIT 28 /* SYN/RST -> ACK rate limit */
627 1.114 thorpej #define TCPCTL_LOOPBACKCKSUM 29 /* do TCP checksum on loopback */
628 1.114 thorpej #define TCPCTL_MAXID 30
629 1.14 thorpej
630 1.14 thorpej #define TCPCTL_NAMES { \
631 1.14 thorpej { 0, 0 }, \
632 1.14 thorpej { "rfc1323", CTLTYPE_INT }, \
633 1.21 thorpej { "sendspace", CTLTYPE_INT }, \
634 1.21 thorpej { "recvspace", CTLTYPE_INT }, \
635 1.21 thorpej { "mssdflt", CTLTYPE_INT }, \
636 1.21 thorpej { "syn_cache_limit", CTLTYPE_INT }, \
637 1.21 thorpej { "syn_bucket_limit", CTLTYPE_INT }, \
638 1.87 thorpej { 0, 0 },\
639 1.29 thorpej { "init_win", CTLTYPE_INT }, \
640 1.41 kml { "mss_ifmtu", CTLTYPE_INT }, \
641 1.43 matt { "sack", CTLTYPE_INT }, \
642 1.43 matt { "win_scale", CTLTYPE_INT }, \
643 1.43 matt { "timestamps", CTLTYPE_INT }, \
644 1.44 thorpej { "compat_42", CTLTYPE_INT }, \
645 1.45 thorpej { "cwm", CTLTYPE_INT }, \
646 1.45 thorpej { "cwm_burstsize", CTLTYPE_INT }, \
647 1.47 thorpej { "ack_on_push", CTLTYPE_INT }, \
648 1.53 mouse { "keepidle", CTLTYPE_INT }, \
649 1.53 mouse { "keepintvl", CTLTYPE_INT }, \
650 1.53 mouse { "keepcnt", CTLTYPE_INT }, \
651 1.53 mouse { "slowhz", CTLTYPE_INT }, \
652 1.55 matt { "newreno", CTLTYPE_INT }, \
653 1.60 ad { "log_refused",CTLTYPE_INT }, \
654 1.74 itojun { 0, 0 }, \
655 1.73 itojun { "rstppslimit", CTLTYPE_INT }, \
656 1.83 thorpej { "delack_ticks", CTLTYPE_INT }, \
657 1.96 thorpej { "init_win_local", CTLTYPE_INT }, \
658 1.97 christos { "ident", CTLTYPE_STRUCT }, \
659 1.108 itojun { "ackdropppslimit", CTLTYPE_INT }, \
660 1.114 thorpej { "do_loopback_cksum", CTLTYPE_INT }, \
661 1.14 thorpej }
662 1.14 thorpej
663 1.10 jtc #ifdef _KERNEL
664 1.90 matt extern struct inpcbtable tcbtable; /* head of queue of active tcpcb's */
665 1.90 matt extern struct tcpstat tcpstat; /* tcp statistics */
666 1.90 matt extern u_int32_t tcp_now; /* for RFC 1323 timestamps */
667 1.14 thorpej extern int tcp_do_rfc1323; /* enabled/disabled? */
668 1.43 matt extern int tcp_do_sack; /* SACK enabled/disabled? */
669 1.43 matt extern int tcp_do_win_scale; /* RFC1323 window scaling enabled/disabled? */
670 1.43 matt extern int tcp_do_timestamps; /* RFC1323 timestamps enabled/disabled? */
671 1.55 matt extern int tcp_do_newreno; /* Use the New Reno algorithms */
672 1.21 thorpej extern int tcp_mssdflt; /* default seg size */
673 1.29 thorpej extern int tcp_init_win; /* initial window */
674 1.96 thorpej extern int tcp_init_win_local; /* initial window for local nets */
675 1.41 kml extern int tcp_mss_ifmtu; /* take MSS from interface, not in_maxmtu */
676 1.42 thorpej extern int tcp_compat_42; /* work around ancient broken TCP peers */
677 1.45 thorpej extern int tcp_cwm; /* enable Congestion Window Monitoring */
678 1.45 thorpej extern int tcp_cwm_burstsize; /* burst size allowed by CWM */
679 1.47 thorpej extern int tcp_ack_on_push; /* ACK immediately on PUSH */
680 1.21 thorpej extern int tcp_syn_cache_limit; /* max entries for compressed state engine */
681 1.21 thorpej extern int tcp_syn_bucket_limit;/* max entries per hash bucket */
682 1.60 ad extern int tcp_log_refused; /* log refused connections */
683 1.114 thorpej extern int tcp_do_loopback_cksum;/* do TCP checksum on loopback? */
684 1.21 thorpej
685 1.73 itojun extern int tcp_rst_ppslim;
686 1.108 itojun extern int tcp_ackdrop_ppslim;
687 1.72 thorpej
688 1.21 thorpej extern int tcp_syn_cache_size;
689 1.49 thorpej extern struct syn_cache_head tcp_syn_cache[];
690 1.21 thorpej extern u_long syn_cache_count;
691 1.95 matt
692 1.113 yamt extern struct pool tcpipqent_pool;
693 1.113 yamt
694 1.95 matt #ifdef MBUFTRACE
695 1.95 matt extern struct mowner tcp_rx_mowner;
696 1.95 matt extern struct mowner tcp_tx_mowner;
697 1.95 matt extern struct mowner tcp_mowner;
698 1.95 matt #endif
699 1.43 matt
700 1.43 matt #define TCPCTL_VARIABLES { \
701 1.53 mouse { 0 }, \
702 1.53 mouse { 1, 0, &tcp_do_rfc1323 }, \
703 1.53 mouse { 1, 0, &tcp_sendspace }, \
704 1.53 mouse { 1, 0, &tcp_recvspace }, \
705 1.53 mouse { 1, 0, &tcp_mssdflt }, \
706 1.53 mouse { 1, 0, &tcp_syn_cache_limit }, \
707 1.53 mouse { 1, 0, &tcp_syn_bucket_limit }, \
708 1.87 thorpej { 0 }, \
709 1.53 mouse { 1, 0, &tcp_init_win }, \
710 1.53 mouse { 1, 0, &tcp_mss_ifmtu }, \
711 1.53 mouse { 1, 0, &tcp_do_sack }, \
712 1.53 mouse { 1, 0, &tcp_do_win_scale }, \
713 1.53 mouse { 1, 0, &tcp_do_timestamps }, \
714 1.53 mouse { 1, 0, &tcp_compat_42 }, \
715 1.53 mouse { 1, 0, &tcp_cwm }, \
716 1.53 mouse { 1, 0, &tcp_cwm_burstsize }, \
717 1.53 mouse { 1, 0, &tcp_ack_on_push }, \
718 1.53 mouse { 1, 0, &tcp_keepidle }, \
719 1.53 mouse { 1, 0, &tcp_keepintvl }, \
720 1.53 mouse { 1, 0, &tcp_keepcnt }, \
721 1.53 mouse { 1, 1, 0, PR_SLOWHZ }, \
722 1.55 matt { 1, 0, &tcp_do_newreno }, \
723 1.60 ad { 1, 0, &tcp_log_refused }, \
724 1.75 itojun { 0 }, \
725 1.73 itojun { 1, 0, &tcp_rst_ppslim }, \
726 1.83 thorpej { 1, 0, &tcp_delack_ticks }, \
727 1.96 thorpej { 1, 0, &tcp_init_win_local }, \
728 1.108 itojun { 1, 0, &tcp_ackdrop_ppslim }, \
729 1.43 matt }
730 1.93 thorpej
731 1.93 thorpej #ifdef __NO_STRICT_ALIGNMENT
732 1.93 thorpej #define TCP_HDR_ALIGNED_P(th) 1
733 1.93 thorpej #else
734 1.109 itojun #define TCP_HDR_ALIGNED_P(th) ((((vaddr_t)(th)) & 3) == 0)
735 1.93 thorpej #endif
736 1.20 thorpej
737 1.112 itojun struct secasvar;
738 1.112 itojun
739 1.109 itojun int tcp_attach(struct socket *);
740 1.109 itojun void tcp_canceltimers(struct tcpcb *);
741 1.109 itojun int tcp_timers_invoking(struct tcpcb*);
742 1.5 mycroft struct tcpcb *
743 1.109 itojun tcp_close(struct tcpcb *);
744 1.109 itojun int tcp_isdead(struct tcpcb *);
745 1.77 itojun #ifdef INET6
746 1.109 itojun void tcp6_ctlinput(int, struct sockaddr *, void *);
747 1.61 itojun #endif
748 1.109 itojun void *tcp_ctlinput(int, struct sockaddr *, void *);
749 1.109 itojun int tcp_ctloutput(int, struct socket *, int, int, struct mbuf **);
750 1.5 mycroft struct tcpcb *
751 1.109 itojun tcp_disconnect(struct tcpcb *);
752 1.5 mycroft struct tcpcb *
753 1.109 itojun tcp_drop(struct tcpcb *, int);
754 1.112 itojun #ifdef TCP_SIGNATURE
755 1.112 itojun int tcp_signature_apply(void *, caddr_t, u_int);
756 1.112 itojun struct secasvar *tcp_signature_getsav(struct mbuf *, struct tcphdr *);
757 1.112 itojun int tcp_signature(struct mbuf *, struct tcphdr *, int, struct secasvar *,
758 1.112 itojun char *);
759 1.112 itojun #endif
760 1.112 itojun int tcp_dooptions(struct tcpcb *, u_char *, int, struct tcphdr *,
761 1.112 itojun struct mbuf *, int, struct tcp_opt_info *);
762 1.109 itojun void tcp_drain(void);
763 1.109 itojun void tcp_established(struct tcpcb *);
764 1.109 itojun void tcp_init(void);
765 1.77 itojun #ifdef INET6
766 1.109 itojun int tcp6_input(struct mbuf **, int *, int);
767 1.61 itojun #endif
768 1.109 itojun void tcp_input(struct mbuf *, ...);
769 1.109 itojun u_long tcp_mss_to_advertise(const struct ifnet *, int);
770 1.109 itojun void tcp_mss_from_peer(struct tcpcb *, int);
771 1.109 itojun void tcp_tcpcb_template(void);
772 1.5 mycroft struct tcpcb *
773 1.109 itojun tcp_newtcpcb(int, void *);
774 1.109 itojun void tcp_notify(struct inpcb *, int);
775 1.77 itojun #ifdef INET6
776 1.109 itojun void tcp6_notify(struct in6pcb *, int);
777 1.64 itojun #endif
778 1.109 itojun u_int tcp_optlen(struct tcpcb *);
779 1.109 itojun int tcp_output(struct tcpcb *);
780 1.109 itojun void tcp_pulloutofband(struct socket *,
781 1.107 matt struct tcphdr *, struct mbuf *, int);
782 1.109 itojun void tcp_quench(struct inpcb *, int);
783 1.77 itojun #ifdef INET6
784 1.109 itojun void tcp6_quench(struct in6pcb *, int);
785 1.64 itojun #endif
786 1.109 itojun int tcp_reass(struct tcpcb *, struct tcphdr *, struct mbuf *, int *);
787 1.109 itojun int tcp_respond(struct tcpcb *, struct mbuf *, struct mbuf *,
788 1.107 matt struct tcphdr *, tcp_seq, tcp_seq, int);
789 1.109 itojun void tcp_rmx_rtt(struct tcpcb *);
790 1.109 itojun void tcp_setpersist(struct tcpcb *);
791 1.110 jonathan #ifdef TCP_SIGNATURE
792 1.111 itojun int tcp_signature_compute(struct mbuf *, struct tcphdr *, int, int,
793 1.111 itojun int, u_char *, u_int);
794 1.110 jonathan #endif
795 1.109 itojun void tcp_slowtimo(void);
796 1.61 itojun struct mbuf *
797 1.109 itojun tcp_template(struct tcpcb *);
798 1.109 itojun void tcp_trace(int, int, struct tcpcb *, struct mbuf *, int);
799 1.5 mycroft struct tcpcb *
800 1.109 itojun tcp_usrclosed(struct tcpcb *);
801 1.109 itojun int tcp_sysctl(int *, u_int, void *, size_t *, void *, size_t);
802 1.109 itojun int tcp_usrreq(struct socket *,
803 1.107 matt int, struct mbuf *, struct mbuf *, struct mbuf *, struct proc *);
804 1.109 itojun void tcp_xmit_timer(struct tcpcb *, uint32_t);
805 1.109 itojun tcp_seq tcp_new_iss(struct tcpcb *, tcp_seq);
806 1.109 itojun tcp_seq tcp_new_iss1(void *, void *, u_int16_t, u_int16_t, size_t,
807 1.107 matt tcp_seq);
808 1.20 thorpej
809 1.109 itojun int syn_cache_add(struct sockaddr *, struct sockaddr *,
810 1.61 itojun struct tcphdr *, unsigned int, struct socket *,
811 1.107 matt struct mbuf *, u_char *, int, struct tcp_opt_info *);
812 1.109 itojun void syn_cache_unreach(struct sockaddr *, struct sockaddr *,
813 1.107 matt struct tcphdr *);
814 1.109 itojun struct socket *syn_cache_get(struct sockaddr *, struct sockaddr *,
815 1.61 itojun struct tcphdr *, unsigned int, unsigned int,
816 1.107 matt struct socket *so, struct mbuf *);
817 1.109 itojun void syn_cache_init(void);
818 1.109 itojun void syn_cache_insert(struct syn_cache *, struct tcpcb *);
819 1.109 itojun struct syn_cache *syn_cache_lookup(struct sockaddr *, struct sockaddr *,
820 1.107 matt struct syn_cache_head **);
821 1.109 itojun void syn_cache_reset(struct sockaddr *, struct sockaddr *,
822 1.107 matt struct tcphdr *);
823 1.109 itojun int syn_cache_respond(struct syn_cache *, struct mbuf *);
824 1.109 itojun void syn_cache_timer(void *);
825 1.109 itojun void syn_cache_cleanup(struct tcpcb *);
826 1.20 thorpej
827 1.117 mycroft void tcp_reno_newack(struct tcpcb *, struct tcphdr *);
828 1.117 mycroft void tcp_newreno_newack(struct tcpcb *, struct tcphdr *);
829 1.115 yamt
830 1.115 yamt int tcp_input_checksum(int, struct mbuf *, const struct tcphdr *, int, int,
831 1.115 yamt int);
832 1.1 cgd #endif
833 1.34 perry
834 1.34 perry #endif /* _NETINET_TCP_VAR_H_ */
835