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7bcd1bb8 KB |
1 | /*- |
2 | * Copyright (c) 1991 The Regents of the University of California. | |
3 | * All rights reserved. | |
4 | * | |
5 | * %sccs.include.redist.c% | |
6 | * | |
5548a02f | 7 | * @(#)tp_subr2.c 7.21 (Berkeley) %G% |
7bcd1bb8 KB |
8 | */ |
9 | ||
3202a7cd KS |
10 | /*********************************************************** |
11 | Copyright IBM Corporation 1987 | |
12 | ||
13 | All Rights Reserved | |
14 | ||
15 | Permission to use, copy, modify, and distribute this software and its | |
16 | documentation for any purpose and without fee is hereby granted, | |
17 | provided that the above copyright notice appear in all copies and that | |
18 | both that copyright notice and this permission notice appear in | |
19 | supporting documentation, and that the name of IBM not be | |
20 | used in advertising or publicity pertaining to distribution of the | |
21 | software without specific, written prior permission. | |
22 | ||
23 | IBM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING | |
24 | ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL | |
25 | IBM BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR | |
26 | ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, | |
27 | WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, | |
28 | ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS | |
29 | SOFTWARE. | |
30 | ||
31 | ******************************************************************/ | |
32 | ||
33 | /* | |
34 | * ARGO Project, Computer Sciences Dept., University of Wisconsin - Madison | |
35 | */ | |
36 | /* | |
37 | * ARGO TP | |
38 | * | |
39 | * $Header: tp_subr2.c,v 5.5 88/11/18 17:28:55 nhall Exp $ | |
40 | * $Source: /usr/argo/sys/netiso/RCS/tp_subr2.c,v $ | |
41 | * | |
42 | * Some auxiliary routines: | |
7bcd1bb8 KB |
43 | * tp_protocol_error: required by xebec- called when a combo of state, |
44 | * event, predicate isn't covered for by the transition file. | |
45 | * tp_indicate: gives indications(signals) to the user process | |
46 | * tp_getoptions: initializes variables that are affected by the options | |
47 | * chosen. | |
3202a7cd KS |
48 | */ |
49 | ||
3202a7cd KS |
50 | /* this def'n is to cause the expansion of this macro in the |
51 | * routine tp_local_credit : | |
52 | */ | |
53 | #define LOCAL_CREDIT_EXPAND | |
54 | ||
5548a02f KB |
55 | #include <sys/param.h> |
56 | #include <sys/systm.h> | |
57 | #include <sys/mbuf.h> | |
58 | #include <sys/socket.h> | |
59 | #include <sys/socketvar.h> | |
60 | #include <sys/domain.h> | |
61 | #include <sys/protosw.h> | |
62 | #include <sys/errno.h> | |
63 | #include <sys/time.h> | |
64 | #include <sys/kernel.h> | |
65 | ||
3202a7cd | 66 | #undef MNULL |
5548a02f KB |
67 | #include <netiso/argo_debug.h> |
68 | #include <netiso/tp_param.h> | |
69 | #include <netiso/tp_ip.h> | |
70 | #include <netiso/iso.h> | |
71 | #include <netiso/iso_errno.h> | |
72 | #include <netiso/iso_pcb.h> | |
73 | #include <netiso/tp_timer.h> | |
74 | #include <netiso/tp_stat.h> | |
75 | #include <netiso/tp_tpdu.h> | |
76 | #include <netiso/tp_pcb.h> | |
77 | #include <netiso/tp_seq.h> | |
78 | #include <netiso/tp_trace.h> | |
79 | #include <netiso/tp_user.h> | |
80 | #include <netiso/cons.h> | |
3202a7cd | 81 | |
5548a02f KB |
82 | #include <net/if.h> |
83 | #include <net/if_types.h> | |
194a383a KS |
84 | #ifdef TRUE |
85 | #undef FALSE | |
86 | #undef TRUE | |
87 | #endif | |
5548a02f KB |
88 | #include <netccitt/x25.h> |
89 | #include <netccitt/pk.h> | |
90 | #include <netccitt/pk_var.h> | |
194a383a | 91 | |
e900dd35 KS |
92 | void tp_rsyset(); |
93 | ||
3202a7cd KS |
94 | /* |
95 | * NAME: tp_local_credit() | |
96 | * | |
97 | * CALLED FROM: | |
98 | * tp_emit(), tp_usrreq() | |
99 | * | |
100 | * FUNCTION and ARGUMENTS: | |
101 | * Computes the local credit and stashes it in tpcb->tp_lcredit. | |
102 | * It's a macro in the production system rather than a procdure. | |
103 | * | |
104 | * RETURNS: | |
105 | * | |
106 | * SIDE EFFECTS: | |
107 | * | |
108 | * NOTES: | |
109 | * This doesn't actually get called in a production system - | |
110 | * the macro gets expanded instead in place of calls to this proc. | |
111 | * But for debugging, we call this and that allows us to add | |
112 | * debugging messages easily here. | |
113 | */ | |
114 | void | |
115 | tp_local_credit(tpcb) | |
116 | struct tp_pcb *tpcb; | |
117 | { | |
118 | LOCAL_CREDIT(tpcb); | |
119 | IFDEBUG(D_CREDIT) | |
120 | printf("ref 0x%x lcdt 0x%x l_tpdusize 0x%x decbit 0x%x\n", | |
378ea02c | 121 | tpcb->tp_lref, |
3202a7cd KS |
122 | tpcb->tp_lcredit, |
123 | tpcb->tp_l_tpdusize, | |
124 | tpcb->tp_decbit, | |
125 | tpcb->tp_cong_win | |
126 | ); | |
127 | ENDDEBUG | |
128 | IFTRACE(D_CREDIT) | |
129 | tptraceTPCB(TPPTmisc, | |
130 | "lcdt tpdusz \n", | |
131 | tpcb->tp_lcredit, tpcb->tp_l_tpdusize, 0, 0); | |
132 | ENDTRACE | |
133 | } | |
134 | ||
135 | /* | |
136 | * NAME: tp_protocol_error() | |
137 | * | |
138 | * CALLED FROM: | |
139 | * tp_driver(), when it doesn't know what to do with | |
140 | * a combo of event, state, predicate | |
141 | * | |
142 | * FUNCTION and ARGUMENTS: | |
143 | * print error mesg | |
144 | * | |
145 | * RETURN VALUE: | |
146 | * EIO - always | |
147 | * | |
148 | * SIDE EFFECTS: | |
149 | * | |
150 | * NOTES: | |
151 | */ | |
152 | int | |
153 | tp_protocol_error(e,tpcb) | |
154 | struct tp_event *e; | |
155 | struct tp_pcb *tpcb; | |
156 | { | |
157 | printf("TP PROTOCOL ERROR! tpcb 0x%x event 0x%x, state 0x%x\n", | |
158 | tpcb, e->ev_number, tpcb->tp_state); | |
159 | IFTRACE(D_DRIVER) | |
160 | tptraceTPCB(TPPTmisc, "PROTOCOL ERROR tpcb event state", | |
161 | tpcb, e->ev_number, tpcb->tp_state, 0 ); | |
162 | ENDTRACE | |
163 | return EIO; /* for lack of anything better */ | |
164 | } | |
165 | ||
166 | ||
167 | /* Not used at the moment */ | |
168 | ProtoHook | |
169 | tp_drain() | |
170 | { | |
171 | return 0; | |
172 | } | |
173 | ||
174 | ||
175 | /* | |
176 | * NAME: tp_indicate() | |
177 | * | |
178 | * CALLED FROM: | |
179 | * tp.trans when XPD arrive, when a connection is being disconnected by | |
180 | * the arrival of a DR or ER, and when a connection times out. | |
181 | * | |
182 | * FUNCTION and ARGUMENTS: | |
183 | * (ind) is the type of indication : T_DISCONNECT, T_XPD | |
184 | * (error) is an E* value that will be put in the socket structure | |
185 | * to be passed along to the user later. | |
186 | * Gives a SIGURG to the user process or group indicated by the socket | |
187 | * attached to the tpcb. | |
188 | * | |
189 | * RETURNS: Rien | |
190 | * | |
191 | * SIDE EFFECTS: | |
192 | * | |
193 | * NOTES: | |
194 | */ | |
195 | void | |
196 | tp_indicate(ind, tpcb, error) | |
197 | int ind; | |
198 | u_short error; | |
199 | register struct tp_pcb *tpcb; | |
200 | { | |
201 | register struct socket *so = tpcb->tp_sock; | |
202 | IFTRACE(D_INDICATION) | |
9aed0596 KS |
203 | tptraceTPCB(TPPTindicate, ind, *(u_short *)(tpcb->tp_lsuffix), |
204 | *(u_short *)(tpcb->tp_fsuffix), error,so->so_pgid); | |
3202a7cd KS |
205 | ENDTRACE |
206 | IFDEBUG(D_INDICATION) | |
a50e2bc0 | 207 | char *ls, *fs; |
3202a7cd KS |
208 | ls = tpcb->tp_lsuffix, |
209 | fs = tpcb->tp_fsuffix, | |
210 | ||
211 | printf( | |
a50e2bc0 | 212 | "indicate 0x%x lsuf 0x%02x%02x fsuf 0x%02x%02x err 0x%x noind 0x%x ref 0x%x\n", |
3202a7cd KS |
213 | ind, |
214 | *ls, *(ls+1), *fs, *(fs+1), | |
a50e2bc0 | 215 | error, /*so->so_pgrp,*/ |
3202a7cd KS |
216 | tpcb->tp_no_disc_indications, |
217 | tpcb->tp_lref); | |
218 | ENDDEBUG | |
219 | ||
6726a5f3 KS |
220 | if (ind == ER_TPDU) { |
221 | register struct mbuf *m; | |
222 | struct tp_disc_reason x; | |
223 | ||
224 | if ((so->so_state & SS_CANTRCVMORE) == 0 && | |
225 | (m = m_get(M_DONTWAIT, MT_OOBDATA)) != 0) { | |
226 | ||
227 | x.dr_hdr.cmsg_len = m->m_len = sizeof(x); | |
228 | x.dr_hdr.cmsg_level = SOL_TRANSPORT; | |
229 | x.dr_hdr.cmsg_type= TPOPT_DISC_REASON; | |
230 | x.dr_reason = error; | |
231 | *mtod(m, struct tp_disc_reason *) = x; | |
232 | sbappendrecord(&tpcb->tp_Xrcv, m); | |
233 | error = 0; | |
234 | } else | |
235 | error = ECONNRESET; | |
236 | } | |
3202a7cd KS |
237 | so->so_error = error; |
238 | ||
239 | if (ind == T_DISCONNECT) { | |
05b32603 KS |
240 | if (error == 0) |
241 | so->so_error = ENOTCONN; | |
3202a7cd KS |
242 | if ( tpcb->tp_no_disc_indications ) |
243 | return; | |
244 | } | |
245 | IFTRACE(D_INDICATION) | |
246 | tptraceTPCB(TPPTmisc, "doing sohasoutofband(so)", so,0,0,0); | |
247 | ENDTRACE | |
248 | sohasoutofband(so); | |
249 | } | |
250 | ||
251 | /* | |
252 | * NAME : tp_getoptions() | |
253 | * | |
254 | * CALLED FROM: | |
255 | * tp.trans whenever we go into OPEN state | |
256 | * | |
257 | * FUNCTION and ARGUMENTS: | |
258 | * sets the proper flags and values in the tpcb, to control | |
259 | * the appropriate actions for the given class, options, | |
260 | * sequence space, etc, etc. | |
261 | * | |
262 | * RETURNS: Nada | |
263 | * | |
264 | * SIDE EFFECTS: | |
265 | * | |
266 | * NOTES: | |
267 | */ | |
268 | void | |
269 | tp_getoptions(tpcb) | |
270 | struct tp_pcb *tpcb; | |
271 | { | |
272 | tpcb->tp_seqmask = | |
273 | tpcb->tp_xtd_format ? TP_XTD_FMT_MASK : TP_NML_FMT_MASK ; | |
274 | tpcb->tp_seqbit = | |
275 | tpcb->tp_xtd_format ? TP_XTD_FMT_BIT : TP_NML_FMT_BIT ; | |
276 | tpcb->tp_seqhalf = tpcb->tp_seqbit >> 1; | |
277 | tpcb->tp_dt_ticks = | |
3d28e0a4 | 278 | max(tpcb->tp_dt_ticks, (tpcb->tp_peer_acktime + 2)); |
e900dd35 | 279 | tp_rsyset(tpcb); |
7893315b | 280 | |
3202a7cd KS |
281 | } |
282 | ||
283 | /* | |
284 | * NAME: tp_recycle_tsuffix() | |
285 | * | |
286 | * CALLED FROM: | |
287 | * Called when a ref is frozen. | |
288 | * | |
289 | * FUNCTION and ARGUMENTS: | |
290 | * allows the suffix to be reused. | |
291 | * | |
292 | * RETURNS: zilch | |
293 | * | |
294 | * SIDE EFFECTS: | |
295 | * | |
296 | * NOTES: | |
297 | */ | |
298 | void | |
299 | tp_recycle_tsuffix(tpcb) | |
300 | struct tp_pcb *tpcb; | |
301 | { | |
a50e2bc0 KS |
302 | bzero((caddr_t)tpcb->tp_lsuffix, sizeof( tpcb->tp_lsuffix)); |
303 | bzero((caddr_t)tpcb->tp_fsuffix, sizeof( tpcb->tp_fsuffix)); | |
3202a7cd KS |
304 | tpcb->tp_fsuffixlen = tpcb->tp_lsuffixlen = 0; |
305 | ||
306 | (tpcb->tp_nlproto->nlp_recycle_suffix)(tpcb->tp_npcb); | |
307 | } | |
308 | ||
309 | /* | |
310 | * NAME: tp_quench() | |
311 | * | |
312 | * CALLED FROM: | |
313 | * tp{af}_quench() when ICMP source quench or similar thing arrives. | |
314 | * | |
315 | * FUNCTION and ARGUMENTS: | |
316 | * Drop the congestion window back to 1. | |
317 | * Congestion window scheme: | |
318 | * Initial value is 1. ("slow start" as Nagle, et. al. call it) | |
319 | * For each good ack that arrives, the congestion window is increased | |
320 | * by 1 (up to max size of logical infinity, which is to say, | |
321 | * it doesn't wrap around). | |
322 | * Source quench causes it to drop back to 1. | |
323 | * tp_send() uses the smaller of (regular window, congestion window). | |
324 | * One retransmission strategy option is to have any retransmission | |
325 | * cause reset the congestion window back to 1. | |
326 | * | |
327 | * (cmd) is either PRC_QUENCH: source quench, or | |
328 | * PRC_QUENCH2: dest. quench (dec bit) | |
329 | * | |
330 | * RETURNS: | |
331 | * | |
332 | * SIDE EFFECTS: | |
333 | * | |
334 | * NOTES: | |
335 | */ | |
336 | void | |
337 | tp_quench( tpcb, cmd ) | |
338 | struct tp_pcb *tpcb; | |
339 | int cmd; | |
340 | { | |
341 | IFDEBUG(D_QUENCH) | |
342 | printf("tp_quench tpcb 0x%x ref 0x%x sufx 0x%x\n", | |
9aed0596 | 343 | tpcb, tpcb->tp_lref, *(u_short *)(tpcb->tp_lsuffix)); |
3202a7cd KS |
344 | printf("cong_win 0x%x decbit 0x%x \n", |
345 | tpcb->tp_cong_win, tpcb->tp_decbit); | |
346 | ENDDEBUG | |
347 | switch(cmd) { | |
348 | case PRC_QUENCH: | |
bdf41b09 | 349 | tpcb->tp_cong_win = tpcb->tp_l_tpdusize; |
3202a7cd KS |
350 | IncStat(ts_quench); |
351 | break; | |
352 | case PRC_QUENCH2: | |
bdf41b09 | 353 | tpcb->tp_cong_win = tpcb->tp_l_tpdusize; /* might as well quench source also */ |
3202a7cd KS |
354 | tpcb->tp_decbit = TP_DECBIT_CLEAR_COUNT; |
355 | IncStat(ts_rcvdecbit); | |
356 | break; | |
357 | } | |
358 | } | |
359 | ||
360 | ||
361 | /* | |
362 | * NAME: tp_netcmd() | |
363 | * | |
364 | * CALLED FROM: | |
365 | * | |
366 | * FUNCTION and ARGUMENTS: | |
367 | * | |
368 | * RETURNS: | |
369 | * | |
370 | * SIDE EFFECTS: | |
371 | * | |
372 | * NOTES: | |
373 | */ | |
374 | tp_netcmd( tpcb, cmd ) | |
375 | struct tp_pcb *tpcb; | |
376 | int cmd; | |
377 | { | |
194a383a KS |
378 | #ifdef TPCONS |
379 | struct isopcb *isop; | |
380 | struct pklcd *lcp; | |
381 | ||
382 | if (tpcb->tp_netservice != ISO_CONS) | |
383 | return; | |
384 | isop = (struct isopcb *)tpcb->tp_npcb; | |
385 | lcp = (struct pklcd *)isop->isop_chan; | |
3202a7cd KS |
386 | switch (cmd) { |
387 | ||
388 | case CONN_CLOSE: | |
389 | case CONN_REFUSE: | |
01acbfa1 KS |
390 | if (isop->isop_refcnt == 1) { |
391 | /* This is really superfluous, since it would happen | |
392 | anyway in iso_pcbdetach, although it is a courtesy | |
393 | to free up the x.25 channel before the refwait timer | |
394 | expires. */ | |
395 | lcp->lcd_upper = 0; | |
396 | lcp->lcd_upnext = 0; | |
194a383a | 397 | pk_disconnect(lcp); |
01acbfa1 KS |
398 | isop->isop_chan = 0; |
399 | isop->isop_refcnt = 0; | |
400 | } | |
3202a7cd KS |
401 | break; |
402 | ||
403 | default: | |
404 | printf("tp_netcmd(0x%x, 0x%x) NOT IMPLEMENTED\n", tpcb, cmd); | |
405 | break; | |
406 | } | |
194a383a | 407 | #else TPCONS |
3202a7cd | 408 | printf("tp_netcmd(): X25 NOT CONFIGURED!!\n"); |
194a383a | 409 | #endif |
3202a7cd KS |
410 | } |
411 | /* | |
412 | * CALLED FROM: | |
413 | * tp_ctloutput() and tp_emit() | |
414 | * FUNCTION and ARGUMENTS: | |
415 | * Convert a class mask to the highest numeric value it represents. | |
416 | */ | |
417 | ||
418 | int | |
419 | tp_mask_to_num(x) | |
420 | u_char x; | |
421 | { | |
422 | register int j; | |
423 | ||
424 | for(j = 4; j>=0 ;j--) { | |
425 | if(x & (1<<j)) | |
426 | break; | |
427 | } | |
428 | ASSERT( (j == 4) || (j == 0) ); /* for now */ | |
429 | if( (j != 4) && (j != 0) ) { | |
430 | printf("ASSERTION ERROR: tp_mask_to_num: x 0x%x j %d\n", | |
431 | x, j); | |
432 | } | |
433 | IFTRACE(D_TPINPUT) | |
434 | tptrace(TPPTmisc, "tp_mask_to_num(x) returns j", x, j, 0, 0); | |
435 | ENDTRACE | |
436 | IFDEBUG(D_TPINPUT) | |
437 | printf("tp_mask_to_num(0x%x) returns 0x%x\n", x, j); | |
438 | ENDDEBUG | |
439 | return j; | |
440 | } | |
441 | ||
442 | static | |
443 | copyQOSparms(src, dst) | |
444 | struct tp_conn_param *src, *dst; | |
445 | { | |
446 | /* copy all but the bits stuff at the end */ | |
447 | #define COPYSIZE (12 * sizeof(short)) | |
448 | ||
a50e2bc0 | 449 | bcopy((caddr_t)src, (caddr_t)dst, COPYSIZE); |
3202a7cd KS |
450 | dst->p_tpdusize = src->p_tpdusize; |
451 | dst->p_ack_strat = src->p_ack_strat; | |
452 | dst->p_rx_strat = src->p_rx_strat; | |
453 | #undef COPYSIZE | |
454 | } | |
d696d41e KS |
455 | /* |
456 | * Determine a reasonable value for maxseg size. | |
457 | * If the route is known, check route for mtu. | |
458 | * We also initialize the congestion/slow start | |
459 | * window to be a single segment if the destination isn't local. | |
460 | * While looking at the routing entry, we also initialize other path-dependent | |
461 | * parameters from pre-set or cached values in the routing entry. | |
462 | */ | |
463 | void | |
464 | tp_mss(tpcb, nhdr_size) | |
465 | register struct tp_pcb *tpcb; | |
466 | int nhdr_size; | |
467 | { | |
468 | register struct rtentry *rt; | |
469 | struct ifnet *ifp; | |
470 | register int rtt, mss; | |
471 | u_long bufsize; | |
d119092b | 472 | int i, ssthresh = 0, rt_mss; |
d696d41e KS |
473 | struct socket *so; |
474 | ||
d119092b KS |
475 | if (tpcb->tp_ptpdusize) |
476 | mss = tpcb->tp_ptpdusize << 7; | |
477 | else | |
478 | mss = 1 << tpcb->tp_tpdusize; | |
d696d41e KS |
479 | so = tpcb->tp_sock; |
480 | if ((rt = *(tpcb->tp_routep)) == 0) { | |
481 | bufsize = so->so_rcv.sb_hiwat; | |
482 | goto punt_route; | |
483 | } | |
484 | ifp = rt->rt_ifp; | |
485 | ||
486 | #ifdef RTV_MTU /* if route characteristics exist ... */ | |
487 | /* | |
488 | * While we're here, check if there's an initial rtt | |
489 | * or rttvar. Convert from the route-table units | |
490 | * to hz ticks for the smoothed timers and slow-timeout units | |
491 | * for other inital variables. | |
492 | */ | |
493 | if (tpcb->tp_rtt == 0 && (rtt = rt->rt_rmx.rmx_rtt)) { | |
494 | tpcb->tp_rtt = rtt * hz / RTM_RTTUNIT; | |
495 | if (rt->rt_rmx.rmx_rttvar) | |
496 | tpcb->tp_rtv = rt->rt_rmx.rmx_rttvar | |
497 | * hz / RTM_RTTUNIT; | |
498 | else | |
499 | tpcb->tp_rtv = tpcb->tp_rtt; | |
500 | } | |
501 | /* | |
502 | * if there's an mtu associated with the route, use it | |
503 | */ | |
504 | if (rt->rt_rmx.rmx_mtu) | |
d119092b | 505 | rt_mss = rt->rt_rmx.rmx_mtu - nhdr_size; |
d696d41e KS |
506 | else |
507 | #endif /* RTV_MTU */ | |
d119092b KS |
508 | rt_mss = (ifp->if_mtu - nhdr_size); |
509 | if (tpcb->tp_ptpdusize == 0 || /* assume application doesn't care */ | |
510 | mss > rt_mss /* network won't support what was asked for */) | |
511 | mss = rt_mss; | |
d696d41e KS |
512 | /* can propose mtu which are multiples of 128 */ |
513 | mss &= ~0x7f; | |
514 | /* | |
515 | * If there's a pipesize, change the socket buffer | |
516 | * to that size. | |
517 | */ | |
518 | #ifdef RTV_SPIPE | |
519 | if ((bufsize = rt->rt_rmx.rmx_sendpipe) > 0) { | |
520 | #endif | |
521 | bufsize = min(bufsize, so->so_snd.sb_hiwat); | |
522 | (void) sbreserve(&so->so_snd, bufsize); | |
523 | } | |
524 | #ifdef RTV_SPIPE | |
525 | if ((bufsize = rt->rt_rmx.rmx_recvpipe) > 0) { | |
526 | #endif | |
527 | bufsize = min(bufsize, so->so_rcv.sb_hiwat); | |
528 | (void) sbreserve(&so->so_rcv, bufsize); | |
529 | } else | |
530 | bufsize = so->so_rcv.sb_hiwat; | |
531 | #ifdef RTV_SSTHRESH | |
532 | /* | |
533 | * There's some sort of gateway or interface | |
534 | * buffer limit on the path. Use this to set | |
535 | * the slow start threshhold, but set the | |
536 | * threshold to no less than 2*mss. | |
537 | */ | |
538 | ssthresh = rt->rt_rmx.rmx_ssthresh; | |
539 | punt_route: | |
540 | /* | |
541 | * The current mss is initialized to the default value. | |
542 | * If we compute a smaller value, reduce the current mss. | |
543 | * If we compute a larger value, return it for use in sending | |
544 | * a max seg size option. | |
545 | * If we received an offer, don't exceed it. | |
546 | * However, do not accept offers under 128 bytes. | |
547 | */ | |
548 | if (tpcb->tp_l_tpdusize) | |
549 | mss = min(mss, tpcb->tp_l_tpdusize); | |
550 | /* | |
551 | * We want a minimum recv window of 4 packets to | |
552 | * signal packet loss by duplicate acks. | |
553 | */ | |
554 | mss = min(mss, bufsize >> 2) & ~0x7f; | |
555 | mss = max(mss, 128); /* sanity */ | |
556 | tpcb->tp_cong_win = | |
557 | (rt == 0 || (rt->rt_flags & RTF_GATEWAY)) ? mss : bufsize; | |
558 | tpcb->tp_l_tpdusize = mss; | |
e900dd35 | 559 | tp_rsyset(tpcb); |
d696d41e KS |
560 | tpcb->tp_ssthresh = max(2 * mss, ssthresh); |
561 | /* Calculate log2 of mss */ | |
562 | for (i = TP_MIN_TPDUSIZE + 1; i <= TP_MAX_TPDUSIZE; i++) | |
563 | if ((1 << i) > mss) | |
564 | break; | |
565 | i--; | |
566 | tpcb->tp_tpdusize = i; | |
567 | #endif /* RTV_MTU */ | |
568 | } | |
3202a7cd KS |
569 | |
570 | /* | |
571 | * CALLED FROM: | |
572 | * tp_usrreq on PRU_CONNECT and tp_input on receipt of CR | |
573 | * | |
574 | * FUNCTION and ARGUMENTS: | |
d696d41e KS |
575 | * -- An mbuf containing the peer's network address. |
576 | * -- Our control block, which will be modified | |
577 | * -- In the case of cons, a control block for that layer. | |
3202a7cd | 578 | * |
3202a7cd KS |
579 | * |
580 | * RETURNS: | |
581 | * errno value : | |
582 | * EAFNOSUPPORT if can't find an nl_protosw for x.25 (really could panic) | |
583 | * ECONNREFUSED if trying to run TP0 with non-type 37 address | |
584 | * possibly other E* returned from cons_netcmd() | |
d696d41e KS |
585 | * |
586 | * SIDE EFFECTS: | |
587 | * Determines recommended tpdusize, buffering and intial delays | |
588 | * based on information cached on the route. | |
3202a7cd KS |
589 | */ |
590 | int | |
591 | tp_route_to( m, tpcb, channel) | |
592 | struct mbuf *m; | |
593 | register struct tp_pcb *tpcb; | |
194a383a | 594 | caddr_t channel; |
3202a7cd KS |
595 | { |
596 | register struct sockaddr_iso *siso; /* NOTE: this may be a sockaddr_in */ | |
597 | extern struct tp_conn_param tp_conn_param[]; | |
01acbfa1 KS |
598 | int error = 0, save_netservice = tpcb->tp_netservice; |
599 | register struct rtentry *rt = 0; | |
d696d41e | 600 | int nhdr_size, mtu, bufsize; |
3202a7cd KS |
601 | |
602 | siso = mtod(m, struct sockaddr_iso *); | |
603 | IFTRACE(D_CONN) | |
604 | tptraceTPCB(TPPTmisc, | |
605 | "route_to: so afi netservice class", | |
a50e2bc0 | 606 | tpcb->tp_sock, siso->siso_addr.isoa_genaddr[0], tpcb->tp_netservice, |
3202a7cd KS |
607 | tpcb->tp_class); |
608 | ENDTRACE | |
609 | IFDEBUG(D_CONN) | |
610 | printf("tp_route_to( m x%x, channel 0x%x, tpcb 0x%x netserv 0x%x)\n", | |
611 | m, channel, tpcb, tpcb->tp_netservice); | |
612 | printf("m->mlen x%x, m->m_data:\n", m->m_len); | |
613 | dump_buf(mtod(m, caddr_t), m->m_len); | |
614 | ENDDEBUG | |
01acbfa1 | 615 | if (channel) { |
194a383a | 616 | #ifdef TPCONS |
01acbfa1 | 617 | struct pklcd *lcp = (struct pklcd *)channel; |
194a383a | 618 | struct isopcb *isop = (struct isopcb *)lcp->lcd_upnext, |
f15f73d2 | 619 | *isop_new = (struct isopcb *)tpcb->tp_npcb; |
01acbfa1 KS |
620 | /* The next 2 lines believe that you haven't |
621 | set any network level options or done a pcbconnect | |
622 | and XXXXXXX'edly apply to both inpcb's and isopcb's */ | |
194a383a KS |
623 | remque(isop_new); |
624 | free(isop_new, M_PCB); | |
f15f73d2 | 625 | tpcb->tp_npcb = (caddr_t)isop; |
01acbfa1 KS |
626 | tpcb->tp_netservice = ISO_CONS; |
627 | tpcb->tp_nlproto = nl_protosw + ISO_CONS; | |
d696d41e | 628 | if (isop->isop_refcnt++ == 0) { |
194a383a | 629 | iso_putsufx(isop, tpcb->tp_lsuffix, tpcb->tp_lsuffixlen, TP_LOCAL); |
d696d41e KS |
630 | isop->isop_socket = tpcb->tp_sock; |
631 | } else | |
01acbfa1 | 632 | /* there are already connections sharing this */; |
194a383a | 633 | #endif |
01acbfa1 KS |
634 | } else { |
635 | switch (siso->siso_family) { | |
636 | default: | |
637 | error = EAFNOSUPPORT; | |
638 | goto done; | |
639 | #ifdef ISO | |
640 | case AF_ISO: | |
d696d41e KS |
641 | { |
642 | struct isopcb *isop = (struct isopcb *)tpcb->tp_npcb; | |
643 | int flags = tpcb->tp_sock->so_options & SO_DONTROUTE; | |
01acbfa1 | 644 | tpcb->tp_netservice = ISO_CLNS; |
d696d41e KS |
645 | if (clnp_route(&siso->siso_addr, &isop->isop_route, |
646 | flags, (void **)0, (void **)0) == 0) { | |
647 | rt = isop->isop_route.ro_rt; | |
648 | if (rt && rt->rt_flags & RTF_PROTO1) | |
01acbfa1 KS |
649 | tpcb->tp_netservice = ISO_CONS; |
650 | } | |
d696d41e | 651 | } break; |
01acbfa1 KS |
652 | #endif |
653 | #ifdef INET | |
654 | case AF_INET: | |
655 | tpcb->tp_netservice = IN_CLNS; | |
01acbfa1 | 656 | #endif |
d696d41e | 657 | } |
01acbfa1 KS |
658 | if (tpcb->tp_nlproto->nlp_afamily != siso->siso_family) { |
659 | IFDEBUG(D_CONN) | |
660 | printf("tp_route_to( CHANGING nlproto old 0x%x new 0x%x)\n", | |
661 | save_netservice, tpcb->tp_netservice); | |
662 | ENDDEBUG | |
663 | if (error = tp_set_npcb(tpcb)) | |
664 | goto done; | |
665 | } | |
666 | IFDEBUG(D_CONN) | |
667 | printf("tp_route_to calling nlp_pcbconn, netserv %d\n", | |
668 | tpcb->tp_netservice); | |
669 | ENDDEBUG | |
670 | tpcb->tp_nlproto = nl_protosw + tpcb->tp_netservice; | |
f15f73d2 | 671 | error = (tpcb->tp_nlproto->nlp_pcbconn)(tpcb->tp_npcb, m); |
01acbfa1 | 672 | } |
d696d41e | 673 | if (error) |
3202a7cd | 674 | goto done; |
d696d41e KS |
675 | nhdr_size = tpcb->tp_nlproto->nlp_mtu(tpcb); /* only gets common info */ |
676 | tp_mss(tpcb, nhdr_size); | |
3202a7cd KS |
677 | done: |
678 | IFDEBUG(D_CONN) | |
679 | printf("tp_route_to returns 0x%x\n", error); | |
680 | ENDDEBUG | |
681 | IFTRACE(D_CONN) | |
682 | tptraceTPCB(TPPTmisc, "route_to: returns: error netserv class", error, | |
683 | tpcb->tp_netservice, tpcb->tp_class, 0); | |
684 | ENDTRACE | |
685 | return error; | |
686 | } | |
687 | ||
74d56f78 KS |
688 | |
689 | /* class zero version */ | |
690 | void | |
691 | tp0_stash( tpcb, e ) | |
692 | register struct tp_pcb *tpcb; | |
693 | register struct tp_event *e; | |
694 | { | |
695 | #ifndef lint | |
696 | #define E e->ATTR(DT_TPDU) | |
697 | #else lint | |
698 | #define E e->ev_union.EV_DT_TPDU | |
699 | #endif lint | |
700 | ||
701 | register struct sockbuf *sb = &tpcb->tp_sock->so_rcv; | |
702 | register struct isopcb *isop = (struct isopcb *)tpcb->tp_npcb; | |
703 | ||
704 | IFPERF(tpcb) | |
705 | PStat(tpcb, Nb_from_ll) += E.e_datalen; | |
706 | tpmeas(tpcb->tp_lref, TPtime_from_ll, &e->e_time, | |
707 | E.e_seq, PStat(tpcb, Nb_from_ll), E.e_datalen); | |
708 | ENDPERF | |
709 | ||
710 | IFDEBUG(D_STASH) | |
711 | printf("stash EQ: seq 0x%x datalen 0x%x eot 0x%x", | |
712 | E.e_seq, E.e_datalen, E.e_eot); | |
713 | ENDDEBUG | |
714 | ||
715 | IFTRACE(D_STASH) | |
716 | tptraceTPCB(TPPTmisc, "stash EQ: seq len eot", | |
717 | E.e_seq, E.e_datalen, E.e_eot, 0); | |
718 | ENDTRACE | |
719 | ||
720 | if ( E.e_eot ) { | |
721 | register struct mbuf *n = E.e_data; | |
722 | n->m_flags |= M_EOR; | |
723 | n->m_act = MNULL; /* set on tp_input */ | |
724 | } | |
725 | sbappend(sb, E.e_data); | |
726 | IFDEBUG(D_STASH) | |
727 | dump_mbuf(sb->sb_mb, "stash 0: so_rcv after appending"); | |
728 | ENDDEBUG | |
729 | if (tpcb->tp_netservice != ISO_CONS) | |
730 | printf("tp0_stash: tp running over something wierd\n"); | |
731 | else { | |
732 | register struct pklcd *lcp = (struct pklcd *)isop->isop_chan; | |
733 | pk_flowcontrol(lcp, sbspace(sb) <= 0, 1); | |
734 | } | |
735 | } | |
736 | ||
737 | void | |
738 | tp0_openflow(tpcb) | |
739 | register struct tp_pcb *tpcb; | |
740 | { | |
741 | register struct isopcb *isop = (struct isopcb *)tpcb->tp_npcb; | |
742 | if (tpcb->tp_netservice != ISO_CONS) | |
743 | printf("tp0_openflow: tp running over something wierd\n"); | |
744 | else { | |
745 | register struct pklcd *lcp = (struct pklcd *)isop->isop_chan; | |
746 | if (lcp->lcd_rxrnr_condition) | |
747 | pk_flowcontrol(lcp, 0, 0); | |
748 | } | |
749 | } | |
750 | #ifndef TPCONS | |
751 | static | |
752 | pk_flowcontrol() {} | |
753 | #endif | |
754 | ||
3202a7cd KS |
755 | #ifdef TP_PERF_MEAS |
756 | /* | |
757 | * CALLED FROM: | |
758 | * tp_ctloutput() when the user sets TPOPT_PERF_MEAS on | |
759 | * and tp_newsocket() when a new connection is made from | |
760 | * a listening socket with tp_perf_on == true. | |
761 | * FUNCTION and ARGUMENTS: | |
762 | * (tpcb) is the usual; this procedure gets a clear cluster mbuf for | |
763 | * a tp_pmeas structure, and makes tpcb->tp_p_meas point to it. | |
764 | * RETURN VALUE: | |
765 | * ENOBUFS if it cannot get a cluster mbuf. | |
766 | */ | |
767 | ||
768 | int | |
769 | tp_setup_perf(tpcb) | |
770 | register struct tp_pcb *tpcb; | |
771 | { | |
772 | register struct mbuf *q; | |
773 | ||
a50e2bc0 KS |
774 | if( tpcb->tp_p_meas == 0 ) { |
775 | MGET(q, M_WAITOK, MT_PCB); | |
3202a7cd KS |
776 | if (q == 0) |
777 | return ENOBUFS; | |
a50e2bc0 KS |
778 | MCLGET(q, M_WAITOK); |
779 | if ((q->m_flags & M_EXT) == 0) { | |
780 | (void) m_free(q); | |
3202a7cd | 781 | return ENOBUFS; |
3202a7cd | 782 | } |
a50e2bc0 KS |
783 | q->m_len = sizeof (struct tp_pmeas); |
784 | tpcb->tp_p_mbuf = q; | |
785 | tpcb->tp_p_meas = mtod(q, struct tp_pmeas *); | |
786 | bzero( (caddr_t)tpcb->tp_p_meas, sizeof (struct tp_pmeas) ); | |
787 | IFDEBUG(D_PERF_MEAS) | |
788 | printf( | |
789 | "tpcb 0x%x so 0x%x ref 0x%x tp_p_meas 0x%x tp_perf_on 0x%x\n", | |
790 | tpcb, tpcb->tp_sock, tpcb->tp_lref, | |
791 | tpcb->tp_p_meas, tpcb->tp_perf_on); | |
792 | ENDDEBUG | |
793 | tpcb->tp_perf_on = 1; | |
3202a7cd KS |
794 | } |
795 | return 0; | |
796 | } | |
797 | #endif TP_PERF_MEAS | |
798 | ||
799 | #ifdef ARGO_DEBUG | |
800 | dump_addr (addr) | |
801 | register struct sockaddr *addr; | |
802 | { | |
803 | switch( addr->sa_family ) { | |
804 | case AF_INET: | |
a50e2bc0 | 805 | dump_inaddr((struct sockaddr_in *)addr); |
3202a7cd | 806 | break; |
a50e2bc0 | 807 | #ifdef ISO |
3202a7cd | 808 | case AF_ISO: |
a50e2bc0 | 809 | dump_isoaddr((struct sockaddr_iso *)addr); |
3202a7cd | 810 | break; |
a50e2bc0 | 811 | #endif ISO |
3202a7cd KS |
812 | default: |
813 | printf("BAD AF: 0x%x\n", addr->sa_family); | |
814 | break; | |
815 | } | |
816 | } | |
817 | ||
a50e2bc0 KS |
818 | #define MAX_COLUMNS 8 |
819 | /* | |
820 | * Dump the buffer to the screen in a readable format. Format is: | |
821 | * | |
822 | * hex/dec where hex is the hex format, dec is the decimal format. | |
823 | * columns of hex/dec numbers will be printed, followed by the | |
824 | * character representations (if printable). | |
825 | */ | |
826 | Dump_buf(buf, len) | |
827 | caddr_t buf; | |
828 | int len; | |
829 | { | |
830 | int i,j; | |
67857e5a | 831 | #define Buf ((u_char *)buf) |
a50e2bc0 KS |
832 | printf("Dump buf 0x%x len 0x%x\n", buf, len); |
833 | for (i = 0; i < len; i += MAX_COLUMNS) { | |
834 | printf("+%d:\t", i); | |
835 | for (j = 0; j < MAX_COLUMNS; j++) { | |
836 | if (i + j < len) { | |
67857e5a | 837 | printf("%x/%d\t", Buf[i+j], Buf[i+j]); |
a50e2bc0 KS |
838 | } else { |
839 | printf(" "); | |
840 | } | |
841 | } | |
842 | ||
843 | for (j = 0; j < MAX_COLUMNS; j++) { | |
844 | if (i + j < len) { | |
67857e5a KS |
845 | if (((Buf[i+j]) > 31) && ((Buf[i+j]) < 128)) |
846 | printf("%c", Buf[i+j]); | |
a50e2bc0 KS |
847 | else |
848 | printf("."); | |
849 | } | |
850 | } | |
851 | printf("\n"); | |
852 | } | |
853 | } | |
854 | ||
855 | ||
3202a7cd KS |
856 | #endif ARGO_DEBUG |
857 |