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1 | /*- |
2 | * Copyright (c) 1991 The Regents of the University of California. | |
3 | * All rights reserved. | |
4 | * | |
5 | * %sccs.include.redist.c% | |
6 | * | |
d696d41e | 7 | * @(#)tp_subr2.c 7.17 (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 | ||
55 | #include "param.h" | |
b7f6af29 | 56 | #include "systm.h" |
3202a7cd KS |
57 | #include "mbuf.h" |
58 | #include "socket.h" | |
59 | #include "socketvar.h" | |
60 | #include "domain.h" | |
61 | #include "protosw.h" | |
62 | #include "errno.h" | |
63 | #include "types.h" | |
64 | #include "time.h" | |
65 | #include "kernel.h" | |
66 | #undef MNULL | |
a50e2bc0 KS |
67 | #include "argo_debug.h" |
68 | #include "tp_param.h" | |
69 | #include "tp_ip.h" | |
70 | #include "iso.h" | |
71 | #include "iso_errno.h" | |
72 | #include "iso_pcb.h" | |
73 | #include "tp_timer.h" | |
74 | #include "tp_stat.h" | |
75 | #include "tp_tpdu.h" | |
76 | #include "tp_pcb.h" | |
77 | #include "tp_seq.h" | |
78 | #include "tp_trace.h" | |
79 | #include "tp_user.h" | |
80 | #include "cons.h" | |
3202a7cd | 81 | |
194a383a | 82 | #include "../net/if.h" |
01acbfa1 | 83 | #include "../net/if_types.h" |
194a383a KS |
84 | #ifdef TRUE |
85 | #undef FALSE | |
86 | #undef TRUE | |
87 | #endif | |
88 | #include "../netccitt/x25.h" | |
89 | #include "../netccitt/pk.h" | |
90 | #include "../netccitt/pk_var.h" | |
91 | ||
3202a7cd KS |
92 | /* |
93 | * NAME: tp_local_credit() | |
94 | * | |
95 | * CALLED FROM: | |
96 | * tp_emit(), tp_usrreq() | |
97 | * | |
98 | * FUNCTION and ARGUMENTS: | |
99 | * Computes the local credit and stashes it in tpcb->tp_lcredit. | |
100 | * It's a macro in the production system rather than a procdure. | |
101 | * | |
102 | * RETURNS: | |
103 | * | |
104 | * SIDE EFFECTS: | |
105 | * | |
106 | * NOTES: | |
107 | * This doesn't actually get called in a production system - | |
108 | * the macro gets expanded instead in place of calls to this proc. | |
109 | * But for debugging, we call this and that allows us to add | |
110 | * debugging messages easily here. | |
111 | */ | |
112 | void | |
113 | tp_local_credit(tpcb) | |
114 | struct tp_pcb *tpcb; | |
115 | { | |
116 | LOCAL_CREDIT(tpcb); | |
117 | IFDEBUG(D_CREDIT) | |
118 | printf("ref 0x%x lcdt 0x%x l_tpdusize 0x%x decbit 0x%x\n", | |
378ea02c | 119 | tpcb->tp_lref, |
3202a7cd KS |
120 | tpcb->tp_lcredit, |
121 | tpcb->tp_l_tpdusize, | |
122 | tpcb->tp_decbit, | |
123 | tpcb->tp_cong_win | |
124 | ); | |
125 | ENDDEBUG | |
126 | IFTRACE(D_CREDIT) | |
127 | tptraceTPCB(TPPTmisc, | |
128 | "lcdt tpdusz \n", | |
129 | tpcb->tp_lcredit, tpcb->tp_l_tpdusize, 0, 0); | |
130 | ENDTRACE | |
131 | } | |
132 | ||
133 | /* | |
134 | * NAME: tp_protocol_error() | |
135 | * | |
136 | * CALLED FROM: | |
137 | * tp_driver(), when it doesn't know what to do with | |
138 | * a combo of event, state, predicate | |
139 | * | |
140 | * FUNCTION and ARGUMENTS: | |
141 | * print error mesg | |
142 | * | |
143 | * RETURN VALUE: | |
144 | * EIO - always | |
145 | * | |
146 | * SIDE EFFECTS: | |
147 | * | |
148 | * NOTES: | |
149 | */ | |
150 | int | |
151 | tp_protocol_error(e,tpcb) | |
152 | struct tp_event *e; | |
153 | struct tp_pcb *tpcb; | |
154 | { | |
155 | printf("TP PROTOCOL ERROR! tpcb 0x%x event 0x%x, state 0x%x\n", | |
156 | tpcb, e->ev_number, tpcb->tp_state); | |
157 | IFTRACE(D_DRIVER) | |
158 | tptraceTPCB(TPPTmisc, "PROTOCOL ERROR tpcb event state", | |
159 | tpcb, e->ev_number, tpcb->tp_state, 0 ); | |
160 | ENDTRACE | |
161 | return EIO; /* for lack of anything better */ | |
162 | } | |
163 | ||
164 | ||
165 | /* Not used at the moment */ | |
166 | ProtoHook | |
167 | tp_drain() | |
168 | { | |
169 | return 0; | |
170 | } | |
171 | ||
172 | ||
173 | /* | |
174 | * NAME: tp_indicate() | |
175 | * | |
176 | * CALLED FROM: | |
177 | * tp.trans when XPD arrive, when a connection is being disconnected by | |
178 | * the arrival of a DR or ER, and when a connection times out. | |
179 | * | |
180 | * FUNCTION and ARGUMENTS: | |
181 | * (ind) is the type of indication : T_DISCONNECT, T_XPD | |
182 | * (error) is an E* value that will be put in the socket structure | |
183 | * to be passed along to the user later. | |
184 | * Gives a SIGURG to the user process or group indicated by the socket | |
185 | * attached to the tpcb. | |
186 | * | |
187 | * RETURNS: Rien | |
188 | * | |
189 | * SIDE EFFECTS: | |
190 | * | |
191 | * NOTES: | |
192 | */ | |
193 | void | |
194 | tp_indicate(ind, tpcb, error) | |
195 | int ind; | |
196 | u_short error; | |
197 | register struct tp_pcb *tpcb; | |
198 | { | |
199 | register struct socket *so = tpcb->tp_sock; | |
200 | IFTRACE(D_INDICATION) | |
9aed0596 KS |
201 | tptraceTPCB(TPPTindicate, ind, *(u_short *)(tpcb->tp_lsuffix), |
202 | *(u_short *)(tpcb->tp_fsuffix), error,so->so_pgid); | |
3202a7cd KS |
203 | ENDTRACE |
204 | IFDEBUG(D_INDICATION) | |
a50e2bc0 | 205 | char *ls, *fs; |
3202a7cd KS |
206 | ls = tpcb->tp_lsuffix, |
207 | fs = tpcb->tp_fsuffix, | |
208 | ||
209 | printf( | |
a50e2bc0 | 210 | "indicate 0x%x lsuf 0x%02x%02x fsuf 0x%02x%02x err 0x%x noind 0x%x ref 0x%x\n", |
3202a7cd KS |
211 | ind, |
212 | *ls, *(ls+1), *fs, *(fs+1), | |
a50e2bc0 | 213 | error, /*so->so_pgrp,*/ |
3202a7cd KS |
214 | tpcb->tp_no_disc_indications, |
215 | tpcb->tp_lref); | |
216 | ENDDEBUG | |
217 | ||
6726a5f3 KS |
218 | if (ind == ER_TPDU) { |
219 | register struct mbuf *m; | |
220 | struct tp_disc_reason x; | |
221 | ||
222 | if ((so->so_state & SS_CANTRCVMORE) == 0 && | |
223 | (m = m_get(M_DONTWAIT, MT_OOBDATA)) != 0) { | |
224 | ||
225 | x.dr_hdr.cmsg_len = m->m_len = sizeof(x); | |
226 | x.dr_hdr.cmsg_level = SOL_TRANSPORT; | |
227 | x.dr_hdr.cmsg_type= TPOPT_DISC_REASON; | |
228 | x.dr_reason = error; | |
229 | *mtod(m, struct tp_disc_reason *) = x; | |
230 | sbappendrecord(&tpcb->tp_Xrcv, m); | |
231 | error = 0; | |
232 | } else | |
233 | error = ECONNRESET; | |
234 | } | |
3202a7cd KS |
235 | so->so_error = error; |
236 | ||
237 | if (ind == T_DISCONNECT) { | |
05b32603 KS |
238 | if (error == 0) |
239 | so->so_error = ENOTCONN; | |
3202a7cd KS |
240 | if ( tpcb->tp_no_disc_indications ) |
241 | return; | |
242 | } | |
243 | IFTRACE(D_INDICATION) | |
244 | tptraceTPCB(TPPTmisc, "doing sohasoutofband(so)", so,0,0,0); | |
245 | ENDTRACE | |
246 | sohasoutofband(so); | |
247 | } | |
248 | ||
249 | /* | |
250 | * NAME : tp_getoptions() | |
251 | * | |
252 | * CALLED FROM: | |
253 | * tp.trans whenever we go into OPEN state | |
254 | * | |
255 | * FUNCTION and ARGUMENTS: | |
256 | * sets the proper flags and values in the tpcb, to control | |
257 | * the appropriate actions for the given class, options, | |
258 | * sequence space, etc, etc. | |
259 | * | |
260 | * RETURNS: Nada | |
261 | * | |
262 | * SIDE EFFECTS: | |
263 | * | |
264 | * NOTES: | |
265 | */ | |
266 | void | |
267 | tp_getoptions(tpcb) | |
268 | struct tp_pcb *tpcb; | |
269 | { | |
270 | tpcb->tp_seqmask = | |
271 | tpcb->tp_xtd_format ? TP_XTD_FMT_MASK : TP_NML_FMT_MASK ; | |
272 | tpcb->tp_seqbit = | |
273 | tpcb->tp_xtd_format ? TP_XTD_FMT_BIT : TP_NML_FMT_BIT ; | |
274 | tpcb->tp_seqhalf = tpcb->tp_seqbit >> 1; | |
275 | tpcb->tp_dt_ticks = | |
276 | MAX(tpcb->tp_dt_ticks, (tpcb->tp_peer_acktime + 2)); | |
7893315b KS |
277 | (void) tp_rsyset(tpcb); |
278 | ||
3202a7cd KS |
279 | } |
280 | ||
281 | /* | |
282 | * NAME: tp_recycle_tsuffix() | |
283 | * | |
284 | * CALLED FROM: | |
285 | * Called when a ref is frozen. | |
286 | * | |
287 | * FUNCTION and ARGUMENTS: | |
288 | * allows the suffix to be reused. | |
289 | * | |
290 | * RETURNS: zilch | |
291 | * | |
292 | * SIDE EFFECTS: | |
293 | * | |
294 | * NOTES: | |
295 | */ | |
296 | void | |
297 | tp_recycle_tsuffix(tpcb) | |
298 | struct tp_pcb *tpcb; | |
299 | { | |
a50e2bc0 KS |
300 | bzero((caddr_t)tpcb->tp_lsuffix, sizeof( tpcb->tp_lsuffix)); |
301 | bzero((caddr_t)tpcb->tp_fsuffix, sizeof( tpcb->tp_fsuffix)); | |
3202a7cd KS |
302 | tpcb->tp_fsuffixlen = tpcb->tp_lsuffixlen = 0; |
303 | ||
304 | (tpcb->tp_nlproto->nlp_recycle_suffix)(tpcb->tp_npcb); | |
305 | } | |
306 | ||
307 | /* | |
308 | * NAME: tp_quench() | |
309 | * | |
310 | * CALLED FROM: | |
311 | * tp{af}_quench() when ICMP source quench or similar thing arrives. | |
312 | * | |
313 | * FUNCTION and ARGUMENTS: | |
314 | * Drop the congestion window back to 1. | |
315 | * Congestion window scheme: | |
316 | * Initial value is 1. ("slow start" as Nagle, et. al. call it) | |
317 | * For each good ack that arrives, the congestion window is increased | |
318 | * by 1 (up to max size of logical infinity, which is to say, | |
319 | * it doesn't wrap around). | |
320 | * Source quench causes it to drop back to 1. | |
321 | * tp_send() uses the smaller of (regular window, congestion window). | |
322 | * One retransmission strategy option is to have any retransmission | |
323 | * cause reset the congestion window back to 1. | |
324 | * | |
325 | * (cmd) is either PRC_QUENCH: source quench, or | |
326 | * PRC_QUENCH2: dest. quench (dec bit) | |
327 | * | |
328 | * RETURNS: | |
329 | * | |
330 | * SIDE EFFECTS: | |
331 | * | |
332 | * NOTES: | |
333 | */ | |
334 | void | |
335 | tp_quench( tpcb, cmd ) | |
336 | struct tp_pcb *tpcb; | |
337 | int cmd; | |
338 | { | |
339 | IFDEBUG(D_QUENCH) | |
340 | printf("tp_quench tpcb 0x%x ref 0x%x sufx 0x%x\n", | |
9aed0596 | 341 | tpcb, tpcb->tp_lref, *(u_short *)(tpcb->tp_lsuffix)); |
3202a7cd KS |
342 | printf("cong_win 0x%x decbit 0x%x \n", |
343 | tpcb->tp_cong_win, tpcb->tp_decbit); | |
344 | ENDDEBUG | |
345 | switch(cmd) { | |
346 | case PRC_QUENCH: | |
bdf41b09 | 347 | tpcb->tp_cong_win = tpcb->tp_l_tpdusize; |
3202a7cd KS |
348 | IncStat(ts_quench); |
349 | break; | |
350 | case PRC_QUENCH2: | |
bdf41b09 | 351 | tpcb->tp_cong_win = tpcb->tp_l_tpdusize; /* might as well quench source also */ |
3202a7cd KS |
352 | tpcb->tp_decbit = TP_DECBIT_CLEAR_COUNT; |
353 | IncStat(ts_rcvdecbit); | |
354 | break; | |
355 | } | |
356 | } | |
357 | ||
358 | ||
359 | /* | |
360 | * NAME: tp_netcmd() | |
361 | * | |
362 | * CALLED FROM: | |
363 | * | |
364 | * FUNCTION and ARGUMENTS: | |
365 | * | |
366 | * RETURNS: | |
367 | * | |
368 | * SIDE EFFECTS: | |
369 | * | |
370 | * NOTES: | |
371 | */ | |
372 | tp_netcmd( tpcb, cmd ) | |
373 | struct tp_pcb *tpcb; | |
374 | int cmd; | |
375 | { | |
194a383a KS |
376 | #ifdef TPCONS |
377 | struct isopcb *isop; | |
378 | struct pklcd *lcp; | |
379 | ||
380 | if (tpcb->tp_netservice != ISO_CONS) | |
381 | return; | |
382 | isop = (struct isopcb *)tpcb->tp_npcb; | |
383 | lcp = (struct pklcd *)isop->isop_chan; | |
3202a7cd KS |
384 | switch (cmd) { |
385 | ||
386 | case CONN_CLOSE: | |
387 | case CONN_REFUSE: | |
01acbfa1 KS |
388 | if (isop->isop_refcnt == 1) { |
389 | /* This is really superfluous, since it would happen | |
390 | anyway in iso_pcbdetach, although it is a courtesy | |
391 | to free up the x.25 channel before the refwait timer | |
392 | expires. */ | |
393 | lcp->lcd_upper = 0; | |
394 | lcp->lcd_upnext = 0; | |
194a383a | 395 | pk_disconnect(lcp); |
01acbfa1 KS |
396 | isop->isop_chan = 0; |
397 | isop->isop_refcnt = 0; | |
398 | } | |
3202a7cd KS |
399 | break; |
400 | ||
401 | default: | |
402 | printf("tp_netcmd(0x%x, 0x%x) NOT IMPLEMENTED\n", tpcb, cmd); | |
403 | break; | |
404 | } | |
194a383a | 405 | #else TPCONS |
3202a7cd | 406 | printf("tp_netcmd(): X25 NOT CONFIGURED!!\n"); |
194a383a | 407 | #endif |
3202a7cd KS |
408 | } |
409 | /* | |
410 | * CALLED FROM: | |
411 | * tp_ctloutput() and tp_emit() | |
412 | * FUNCTION and ARGUMENTS: | |
413 | * Convert a class mask to the highest numeric value it represents. | |
414 | */ | |
415 | ||
416 | int | |
417 | tp_mask_to_num(x) | |
418 | u_char x; | |
419 | { | |
420 | register int j; | |
421 | ||
422 | for(j = 4; j>=0 ;j--) { | |
423 | if(x & (1<<j)) | |
424 | break; | |
425 | } | |
426 | ASSERT( (j == 4) || (j == 0) ); /* for now */ | |
427 | if( (j != 4) && (j != 0) ) { | |
428 | printf("ASSERTION ERROR: tp_mask_to_num: x 0x%x j %d\n", | |
429 | x, j); | |
430 | } | |
431 | IFTRACE(D_TPINPUT) | |
432 | tptrace(TPPTmisc, "tp_mask_to_num(x) returns j", x, j, 0, 0); | |
433 | ENDTRACE | |
434 | IFDEBUG(D_TPINPUT) | |
435 | printf("tp_mask_to_num(0x%x) returns 0x%x\n", x, j); | |
436 | ENDDEBUG | |
437 | return j; | |
438 | } | |
439 | ||
440 | static | |
441 | copyQOSparms(src, dst) | |
442 | struct tp_conn_param *src, *dst; | |
443 | { | |
444 | /* copy all but the bits stuff at the end */ | |
445 | #define COPYSIZE (12 * sizeof(short)) | |
446 | ||
a50e2bc0 | 447 | bcopy((caddr_t)src, (caddr_t)dst, COPYSIZE); |
3202a7cd KS |
448 | dst->p_tpdusize = src->p_tpdusize; |
449 | dst->p_ack_strat = src->p_ack_strat; | |
450 | dst->p_rx_strat = src->p_rx_strat; | |
451 | #undef COPYSIZE | |
452 | } | |
d696d41e KS |
453 | /* |
454 | * Determine a reasonable value for maxseg size. | |
455 | * If the route is known, check route for mtu. | |
456 | * We also initialize the congestion/slow start | |
457 | * window to be a single segment if the destination isn't local. | |
458 | * While looking at the routing entry, we also initialize other path-dependent | |
459 | * parameters from pre-set or cached values in the routing entry. | |
460 | */ | |
461 | void | |
462 | tp_mss(tpcb, nhdr_size) | |
463 | register struct tp_pcb *tpcb; | |
464 | int nhdr_size; | |
465 | { | |
466 | register struct rtentry *rt; | |
467 | struct ifnet *ifp; | |
468 | register int rtt, mss; | |
469 | u_long bufsize; | |
470 | int i, ssthresh = 0; | |
471 | struct socket *so; | |
472 | ||
473 | mss = 1 << tpcb->tp_tpdusize; | |
474 | so = tpcb->tp_sock; | |
475 | if ((rt = *(tpcb->tp_routep)) == 0) { | |
476 | bufsize = so->so_rcv.sb_hiwat; | |
477 | goto punt_route; | |
478 | } | |
479 | ifp = rt->rt_ifp; | |
480 | ||
481 | #ifdef RTV_MTU /* if route characteristics exist ... */ | |
482 | /* | |
483 | * While we're here, check if there's an initial rtt | |
484 | * or rttvar. Convert from the route-table units | |
485 | * to hz ticks for the smoothed timers and slow-timeout units | |
486 | * for other inital variables. | |
487 | */ | |
488 | if (tpcb->tp_rtt == 0 && (rtt = rt->rt_rmx.rmx_rtt)) { | |
489 | tpcb->tp_rtt = rtt * hz / RTM_RTTUNIT; | |
490 | if (rt->rt_rmx.rmx_rttvar) | |
491 | tpcb->tp_rtv = rt->rt_rmx.rmx_rttvar | |
492 | * hz / RTM_RTTUNIT; | |
493 | else | |
494 | tpcb->tp_rtv = tpcb->tp_rtt; | |
495 | } | |
496 | /* | |
497 | * if there's an mtu associated with the route, use it | |
498 | */ | |
499 | if (rt->rt_rmx.rmx_mtu) | |
500 | mss = rt->rt_rmx.rmx_mtu - nhdr_size; | |
501 | else | |
502 | #endif /* RTV_MTU */ | |
503 | mss = (ifp->if_mtu - nhdr_size); | |
504 | /* can propose mtu which are multiples of 128 */ | |
505 | mss &= ~0x7f; | |
506 | /* | |
507 | * If there's a pipesize, change the socket buffer | |
508 | * to that size. | |
509 | */ | |
510 | #ifdef RTV_SPIPE | |
511 | if ((bufsize = rt->rt_rmx.rmx_sendpipe) > 0) { | |
512 | #endif | |
513 | bufsize = min(bufsize, so->so_snd.sb_hiwat); | |
514 | (void) sbreserve(&so->so_snd, bufsize); | |
515 | } | |
516 | #ifdef RTV_SPIPE | |
517 | if ((bufsize = rt->rt_rmx.rmx_recvpipe) > 0) { | |
518 | #endif | |
519 | bufsize = min(bufsize, so->so_rcv.sb_hiwat); | |
520 | (void) sbreserve(&so->so_rcv, bufsize); | |
521 | } else | |
522 | bufsize = so->so_rcv.sb_hiwat; | |
523 | #ifdef RTV_SSTHRESH | |
524 | /* | |
525 | * There's some sort of gateway or interface | |
526 | * buffer limit on the path. Use this to set | |
527 | * the slow start threshhold, but set the | |
528 | * threshold to no less than 2*mss. | |
529 | */ | |
530 | ssthresh = rt->rt_rmx.rmx_ssthresh; | |
531 | punt_route: | |
532 | /* | |
533 | * The current mss is initialized to the default value. | |
534 | * If we compute a smaller value, reduce the current mss. | |
535 | * If we compute a larger value, return it for use in sending | |
536 | * a max seg size option. | |
537 | * If we received an offer, don't exceed it. | |
538 | * However, do not accept offers under 128 bytes. | |
539 | */ | |
540 | if (tpcb->tp_l_tpdusize) | |
541 | mss = min(mss, tpcb->tp_l_tpdusize); | |
542 | /* | |
543 | * We want a minimum recv window of 4 packets to | |
544 | * signal packet loss by duplicate acks. | |
545 | */ | |
546 | mss = min(mss, bufsize >> 2) & ~0x7f; | |
547 | mss = max(mss, 128); /* sanity */ | |
548 | tpcb->tp_cong_win = | |
549 | (rt == 0 || (rt->rt_flags & RTF_GATEWAY)) ? mss : bufsize; | |
550 | tpcb->tp_l_tpdusize = mss; | |
551 | tpcb->tp_ssthresh = max(2 * mss, ssthresh); | |
552 | /* Calculate log2 of mss */ | |
553 | for (i = TP_MIN_TPDUSIZE + 1; i <= TP_MAX_TPDUSIZE; i++) | |
554 | if ((1 << i) > mss) | |
555 | break; | |
556 | i--; | |
557 | tpcb->tp_tpdusize = i; | |
558 | #endif /* RTV_MTU */ | |
559 | } | |
3202a7cd KS |
560 | |
561 | /* | |
562 | * CALLED FROM: | |
563 | * tp_usrreq on PRU_CONNECT and tp_input on receipt of CR | |
564 | * | |
565 | * FUNCTION and ARGUMENTS: | |
d696d41e KS |
566 | * -- An mbuf containing the peer's network address. |
567 | * -- Our control block, which will be modified | |
568 | * -- In the case of cons, a control block for that layer. | |
3202a7cd | 569 | * |
3202a7cd KS |
570 | * |
571 | * RETURNS: | |
572 | * errno value : | |
573 | * EAFNOSUPPORT if can't find an nl_protosw for x.25 (really could panic) | |
574 | * ECONNREFUSED if trying to run TP0 with non-type 37 address | |
575 | * possibly other E* returned from cons_netcmd() | |
d696d41e KS |
576 | * |
577 | * SIDE EFFECTS: | |
578 | * Determines recommended tpdusize, buffering and intial delays | |
579 | * based on information cached on the route. | |
3202a7cd KS |
580 | */ |
581 | int | |
582 | tp_route_to( m, tpcb, channel) | |
583 | struct mbuf *m; | |
584 | register struct tp_pcb *tpcb; | |
194a383a | 585 | caddr_t channel; |
3202a7cd KS |
586 | { |
587 | register struct sockaddr_iso *siso; /* NOTE: this may be a sockaddr_in */ | |
588 | extern struct tp_conn_param tp_conn_param[]; | |
01acbfa1 KS |
589 | int error = 0, save_netservice = tpcb->tp_netservice; |
590 | register struct rtentry *rt = 0; | |
d696d41e | 591 | int nhdr_size, mtu, bufsize; |
3202a7cd KS |
592 | |
593 | siso = mtod(m, struct sockaddr_iso *); | |
594 | IFTRACE(D_CONN) | |
595 | tptraceTPCB(TPPTmisc, | |
596 | "route_to: so afi netservice class", | |
a50e2bc0 | 597 | tpcb->tp_sock, siso->siso_addr.isoa_genaddr[0], tpcb->tp_netservice, |
3202a7cd KS |
598 | tpcb->tp_class); |
599 | ENDTRACE | |
600 | IFDEBUG(D_CONN) | |
601 | printf("tp_route_to( m x%x, channel 0x%x, tpcb 0x%x netserv 0x%x)\n", | |
602 | m, channel, tpcb, tpcb->tp_netservice); | |
603 | printf("m->mlen x%x, m->m_data:\n", m->m_len); | |
604 | dump_buf(mtod(m, caddr_t), m->m_len); | |
605 | ENDDEBUG | |
01acbfa1 | 606 | if (channel) { |
194a383a | 607 | #ifdef TPCONS |
01acbfa1 | 608 | struct pklcd *lcp = (struct pklcd *)channel; |
194a383a | 609 | struct isopcb *isop = (struct isopcb *)lcp->lcd_upnext, |
f15f73d2 | 610 | *isop_new = (struct isopcb *)tpcb->tp_npcb; |
01acbfa1 KS |
611 | /* The next 2 lines believe that you haven't |
612 | set any network level options or done a pcbconnect | |
613 | and XXXXXXX'edly apply to both inpcb's and isopcb's */ | |
194a383a KS |
614 | remque(isop_new); |
615 | free(isop_new, M_PCB); | |
f15f73d2 | 616 | tpcb->tp_npcb = (caddr_t)isop; |
01acbfa1 KS |
617 | tpcb->tp_netservice = ISO_CONS; |
618 | tpcb->tp_nlproto = nl_protosw + ISO_CONS; | |
d696d41e | 619 | if (isop->isop_refcnt++ == 0) { |
194a383a | 620 | iso_putsufx(isop, tpcb->tp_lsuffix, tpcb->tp_lsuffixlen, TP_LOCAL); |
d696d41e KS |
621 | isop->isop_socket = tpcb->tp_sock; |
622 | } else | |
01acbfa1 | 623 | /* there are already connections sharing this */; |
194a383a | 624 | #endif |
01acbfa1 KS |
625 | } else { |
626 | switch (siso->siso_family) { | |
627 | default: | |
628 | error = EAFNOSUPPORT; | |
629 | goto done; | |
630 | #ifdef ISO | |
631 | case AF_ISO: | |
d696d41e KS |
632 | { |
633 | struct isopcb *isop = (struct isopcb *)tpcb->tp_npcb; | |
634 | int flags = tpcb->tp_sock->so_options & SO_DONTROUTE; | |
01acbfa1 | 635 | tpcb->tp_netservice = ISO_CLNS; |
d696d41e KS |
636 | if (clnp_route(&siso->siso_addr, &isop->isop_route, |
637 | flags, (void **)0, (void **)0) == 0) { | |
638 | rt = isop->isop_route.ro_rt; | |
639 | if (rt && rt->rt_flags & RTF_PROTO1) | |
01acbfa1 KS |
640 | tpcb->tp_netservice = ISO_CONS; |
641 | } | |
d696d41e | 642 | } break; |
01acbfa1 KS |
643 | #endif |
644 | #ifdef INET | |
645 | case AF_INET: | |
646 | tpcb->tp_netservice = IN_CLNS; | |
01acbfa1 | 647 | #endif |
d696d41e | 648 | } |
01acbfa1 KS |
649 | if (tpcb->tp_nlproto->nlp_afamily != siso->siso_family) { |
650 | IFDEBUG(D_CONN) | |
651 | printf("tp_route_to( CHANGING nlproto old 0x%x new 0x%x)\n", | |
652 | save_netservice, tpcb->tp_netservice); | |
653 | ENDDEBUG | |
654 | if (error = tp_set_npcb(tpcb)) | |
655 | goto done; | |
656 | } | |
657 | IFDEBUG(D_CONN) | |
658 | printf("tp_route_to calling nlp_pcbconn, netserv %d\n", | |
659 | tpcb->tp_netservice); | |
660 | ENDDEBUG | |
661 | tpcb->tp_nlproto = nl_protosw + tpcb->tp_netservice; | |
f15f73d2 | 662 | error = (tpcb->tp_nlproto->nlp_pcbconn)(tpcb->tp_npcb, m); |
01acbfa1 | 663 | } |
d696d41e | 664 | if (error) |
3202a7cd | 665 | goto done; |
d696d41e KS |
666 | nhdr_size = tpcb->tp_nlproto->nlp_mtu(tpcb); /* only gets common info */ |
667 | tp_mss(tpcb, nhdr_size); | |
3202a7cd KS |
668 | done: |
669 | IFDEBUG(D_CONN) | |
670 | printf("tp_route_to returns 0x%x\n", error); | |
671 | ENDDEBUG | |
672 | IFTRACE(D_CONN) | |
673 | tptraceTPCB(TPPTmisc, "route_to: returns: error netserv class", error, | |
674 | tpcb->tp_netservice, tpcb->tp_class, 0); | |
675 | ENDTRACE | |
676 | return error; | |
677 | } | |
678 | ||
74d56f78 KS |
679 | |
680 | /* class zero version */ | |
681 | void | |
682 | tp0_stash( tpcb, e ) | |
683 | register struct tp_pcb *tpcb; | |
684 | register struct tp_event *e; | |
685 | { | |
686 | #ifndef lint | |
687 | #define E e->ATTR(DT_TPDU) | |
688 | #else lint | |
689 | #define E e->ev_union.EV_DT_TPDU | |
690 | #endif lint | |
691 | ||
692 | register struct sockbuf *sb = &tpcb->tp_sock->so_rcv; | |
693 | register struct isopcb *isop = (struct isopcb *)tpcb->tp_npcb; | |
694 | ||
695 | IFPERF(tpcb) | |
696 | PStat(tpcb, Nb_from_ll) += E.e_datalen; | |
697 | tpmeas(tpcb->tp_lref, TPtime_from_ll, &e->e_time, | |
698 | E.e_seq, PStat(tpcb, Nb_from_ll), E.e_datalen); | |
699 | ENDPERF | |
700 | ||
701 | IFDEBUG(D_STASH) | |
702 | printf("stash EQ: seq 0x%x datalen 0x%x eot 0x%x", | |
703 | E.e_seq, E.e_datalen, E.e_eot); | |
704 | ENDDEBUG | |
705 | ||
706 | IFTRACE(D_STASH) | |
707 | tptraceTPCB(TPPTmisc, "stash EQ: seq len eot", | |
708 | E.e_seq, E.e_datalen, E.e_eot, 0); | |
709 | ENDTRACE | |
710 | ||
711 | if ( E.e_eot ) { | |
712 | register struct mbuf *n = E.e_data; | |
713 | n->m_flags |= M_EOR; | |
714 | n->m_act = MNULL; /* set on tp_input */ | |
715 | } | |
716 | sbappend(sb, E.e_data); | |
717 | IFDEBUG(D_STASH) | |
718 | dump_mbuf(sb->sb_mb, "stash 0: so_rcv after appending"); | |
719 | ENDDEBUG | |
720 | if (tpcb->tp_netservice != ISO_CONS) | |
721 | printf("tp0_stash: tp running over something wierd\n"); | |
722 | else { | |
723 | register struct pklcd *lcp = (struct pklcd *)isop->isop_chan; | |
724 | pk_flowcontrol(lcp, sbspace(sb) <= 0, 1); | |
725 | } | |
726 | } | |
727 | ||
728 | void | |
729 | tp0_openflow(tpcb) | |
730 | register struct tp_pcb *tpcb; | |
731 | { | |
732 | register struct isopcb *isop = (struct isopcb *)tpcb->tp_npcb; | |
733 | if (tpcb->tp_netservice != ISO_CONS) | |
734 | printf("tp0_openflow: tp running over something wierd\n"); | |
735 | else { | |
736 | register struct pklcd *lcp = (struct pklcd *)isop->isop_chan; | |
737 | if (lcp->lcd_rxrnr_condition) | |
738 | pk_flowcontrol(lcp, 0, 0); | |
739 | } | |
740 | } | |
741 | #ifndef TPCONS | |
742 | static | |
743 | pk_flowcontrol() {} | |
744 | #endif | |
745 | ||
3202a7cd KS |
746 | #ifdef TP_PERF_MEAS |
747 | /* | |
748 | * CALLED FROM: | |
749 | * tp_ctloutput() when the user sets TPOPT_PERF_MEAS on | |
750 | * and tp_newsocket() when a new connection is made from | |
751 | * a listening socket with tp_perf_on == true. | |
752 | * FUNCTION and ARGUMENTS: | |
753 | * (tpcb) is the usual; this procedure gets a clear cluster mbuf for | |
754 | * a tp_pmeas structure, and makes tpcb->tp_p_meas point to it. | |
755 | * RETURN VALUE: | |
756 | * ENOBUFS if it cannot get a cluster mbuf. | |
757 | */ | |
758 | ||
759 | int | |
760 | tp_setup_perf(tpcb) | |
761 | register struct tp_pcb *tpcb; | |
762 | { | |
763 | register struct mbuf *q; | |
764 | ||
a50e2bc0 KS |
765 | if( tpcb->tp_p_meas == 0 ) { |
766 | MGET(q, M_WAITOK, MT_PCB); | |
3202a7cd KS |
767 | if (q == 0) |
768 | return ENOBUFS; | |
a50e2bc0 KS |
769 | MCLGET(q, M_WAITOK); |
770 | if ((q->m_flags & M_EXT) == 0) { | |
771 | (void) m_free(q); | |
3202a7cd | 772 | return ENOBUFS; |
3202a7cd | 773 | } |
a50e2bc0 KS |
774 | q->m_len = sizeof (struct tp_pmeas); |
775 | tpcb->tp_p_mbuf = q; | |
776 | tpcb->tp_p_meas = mtod(q, struct tp_pmeas *); | |
777 | bzero( (caddr_t)tpcb->tp_p_meas, sizeof (struct tp_pmeas) ); | |
778 | IFDEBUG(D_PERF_MEAS) | |
779 | printf( | |
780 | "tpcb 0x%x so 0x%x ref 0x%x tp_p_meas 0x%x tp_perf_on 0x%x\n", | |
781 | tpcb, tpcb->tp_sock, tpcb->tp_lref, | |
782 | tpcb->tp_p_meas, tpcb->tp_perf_on); | |
783 | ENDDEBUG | |
784 | tpcb->tp_perf_on = 1; | |
3202a7cd KS |
785 | } |
786 | return 0; | |
787 | } | |
788 | #endif TP_PERF_MEAS | |
789 | ||
790 | #ifdef ARGO_DEBUG | |
791 | dump_addr (addr) | |
792 | register struct sockaddr *addr; | |
793 | { | |
794 | switch( addr->sa_family ) { | |
795 | case AF_INET: | |
a50e2bc0 | 796 | dump_inaddr((struct sockaddr_in *)addr); |
3202a7cd | 797 | break; |
a50e2bc0 | 798 | #ifdef ISO |
3202a7cd | 799 | case AF_ISO: |
a50e2bc0 | 800 | dump_isoaddr((struct sockaddr_iso *)addr); |
3202a7cd | 801 | break; |
a50e2bc0 | 802 | #endif ISO |
3202a7cd KS |
803 | default: |
804 | printf("BAD AF: 0x%x\n", addr->sa_family); | |
805 | break; | |
806 | } | |
807 | } | |
808 | ||
a50e2bc0 KS |
809 | #define MAX_COLUMNS 8 |
810 | /* | |
811 | * Dump the buffer to the screen in a readable format. Format is: | |
812 | * | |
813 | * hex/dec where hex is the hex format, dec is the decimal format. | |
814 | * columns of hex/dec numbers will be printed, followed by the | |
815 | * character representations (if printable). | |
816 | */ | |
817 | Dump_buf(buf, len) | |
818 | caddr_t buf; | |
819 | int len; | |
820 | { | |
821 | int i,j; | |
67857e5a | 822 | #define Buf ((u_char *)buf) |
a50e2bc0 KS |
823 | printf("Dump buf 0x%x len 0x%x\n", buf, len); |
824 | for (i = 0; i < len; i += MAX_COLUMNS) { | |
825 | printf("+%d:\t", i); | |
826 | for (j = 0; j < MAX_COLUMNS; j++) { | |
827 | if (i + j < len) { | |
67857e5a | 828 | printf("%x/%d\t", Buf[i+j], Buf[i+j]); |
a50e2bc0 KS |
829 | } else { |
830 | printf(" "); | |
831 | } | |
832 | } | |
833 | ||
834 | for (j = 0; j < MAX_COLUMNS; j++) { | |
835 | if (i + j < len) { | |
67857e5a KS |
836 | if (((Buf[i+j]) > 31) && ((Buf[i+j]) < 128)) |
837 | printf("%c", Buf[i+j]); | |
a50e2bc0 KS |
838 | else |
839 | printf("."); | |
840 | } | |
841 | } | |
842 | printf("\n"); | |
843 | } | |
844 | } | |
845 | ||
846 | ||
3202a7cd KS |
847 | #endif ARGO_DEBUG |
848 |