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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 | * | |
6b9d3cc3 | 7 | * @(#)tp_input.c 7.25 (Berkeley) %G% |
7bcd1bb8 KB |
8 | */ |
9 | ||
b7fb0758 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_input.c,v 5.6 88/11/18 17:27:38 nhall Exp $ | |
40 | * $Source: /usr/argo/sys/netiso/RCS/tp_input.c,v $ | |
41 | * | |
42 | * tp_input() gets an mbuf chain from ip. Actually, not directly | |
43 | * from ip, because ip calls a net-level routine that strips off | |
44 | * the net header and then calls tp_input(), passing the proper type | |
45 | * of addresses for the address family in use (how it figures out | |
01acbfa1 | 46 | * which AF is not yet determined.) |
b7fb0758 KS |
47 | * |
48 | * Decomposing the tpdu is some of the most laughable code. The variable-length | |
49 | * parameters and the problem of non-aligned memory references | |
50 | * necessitates such abominations as the macros WHILE_OPTIONS (q.v. below) | |
51 | * to loop through the header and decompose it. | |
52 | * | |
53 | * The routine tp_newsocket() is called when a CR comes in for a listening | |
54 | * socket. tp_input calls sonewconn() and tp_newsocket() to set up the | |
55 | * "child" socket. Most tpcb values are copied from the parent tpcb into | |
56 | * the child. | |
57 | * | |
58 | * Also in here is tp_headersize() (grot) which tells the expected size | |
59 | * of a tp header, to be used by other layers. It's in here because it | |
60 | * uses the static structure tpdu_info. | |
61 | */ | |
62 | ||
b7fb0758 | 63 | #include "param.h" |
63f88aec | 64 | #include "systm.h" |
b7fb0758 KS |
65 | #include "mbuf.h" |
66 | #include "socket.h" | |
67 | #include "socketvar.h" | |
68 | #include "domain.h" | |
69 | #include "protosw.h" | |
70 | #include "errno.h" | |
71 | #include "time.h" | |
72 | #include "kernel.h" | |
73 | #include "types.h" | |
194a383a | 74 | #include "iso.h" |
a50e2bc0 | 75 | #include "iso_errno.h" |
194a383a | 76 | #include "iso_pcb.h" |
a50e2bc0 KS |
77 | #include "tp_param.h" |
78 | #include "tp_timer.h" | |
79 | #include "tp_stat.h" | |
80 | #include "tp_pcb.h" | |
81 | #include "argo_debug.h" | |
82 | #include "tp_trace.h" | |
83 | #include "tp_tpdu.h" | |
194a383a KS |
84 | |
85 | #include "../net/if.h" | |
86 | #ifdef TRUE | |
87 | #undef FALSE | |
88 | #undef TRUE | |
89 | #endif | |
90 | #include "../netccitt/x25.h" | |
91 | #include "../netccitt/pk.h" | |
92 | #include "../netccitt/pk_var.h" | |
b7fb0758 KS |
93 | |
94 | int iso_check_csum(), tp_driver(), tp_headersize(), tp_error_emit(); | |
95 | ||
a50e2bc0 KS |
96 | /* |
97 | #ifdef lint | |
98 | #undef ATTR | |
99 | #define ATTR(X)ev_number | |
100 | #endif lint | |
101 | */ | |
b7fb0758 KS |
102 | |
103 | struct mbuf * | |
104 | tp_inputprep(m) | |
a50e2bc0 | 105 | register struct mbuf *m; |
b7fb0758 | 106 | { |
a50e2bc0 | 107 | int hdrlen; |
b7fb0758 KS |
108 | |
109 | IFDEBUG(D_TPINPUT) | |
a50e2bc0 | 110 | printf("tp_inputprep: m 0x%x\n", m) ; |
b7fb0758 KS |
111 | ENDDEBUG |
112 | ||
113 | while( m->m_len < 1 ) { | |
114 | if( (m = m_free(m)) == MNULL ) { | |
115 | return (struct mbuf *)0; | |
116 | } | |
117 | } | |
a50e2bc0 KS |
118 | if(((int)m->m_data) & 0x3) { |
119 | /* If we are not 4-byte aligned, we have to be | |
120 | * above the beginning of the mbuf, and it is ok just | |
121 | * to slide it back. | |
122 | */ | |
123 | caddr_t ocp = m->m_data; | |
b7fb0758 | 124 | |
a50e2bc0 KS |
125 | m->m_data = (caddr_t)(((int)m->m_data) & ~0x3); |
126 | ovbcopy(ocp, m->m_data, (unsigned)m->m_len); | |
b7fb0758 KS |
127 | } |
128 | CHANGE_MTYPE(m, TPMT_DATA); | |
129 | ||
a50e2bc0 KS |
130 | /* we KNOW that there is at least 1 byte in this mbuf |
131 | and that it is hdr->tpdu_li XXXXXXX! */ | |
b7fb0758 | 132 | |
a50e2bc0 | 133 | hdrlen = 1 + *mtod( m, u_char *); |
b7fb0758 KS |
134 | |
135 | /* | |
136 | * now pull up the whole tp header | |
137 | */ | |
a50e2bc0 KS |
138 | if ( m->m_len < hdrlen) { |
139 | if ((m = m_pullup(m, hdrlen)) == MNULL ) { | |
b7fb0758 KS |
140 | IncStat(ts_recv_drop); |
141 | return (struct mbuf *)0; | |
142 | } | |
143 | } | |
144 | IFDEBUG(D_INPUT) | |
145 | printf( | |
146 | " at end: m 0x%x hdr->tpdu_li 0x%x m_len 0x%x\n",m, | |
a50e2bc0 | 147 | hdrlen, m->m_len); |
b7fb0758 KS |
148 | ENDDEBUG |
149 | return m; | |
150 | } | |
151 | ||
152 | /* begin groan | |
153 | * -- this array and the following macros allow you to step through the | |
154 | * parameters of the variable part of a header | |
155 | * note that if for any reason the values of the **_TPDU macros (in tp_events.h) | |
156 | * should change, this array has to be rearranged | |
157 | */ | |
158 | ||
159 | #define TP_LEN_CLASS_0_INDEX 2 | |
160 | #define TP_MAX_DATA_INDEX 3 | |
161 | ||
162 | static u_char tpdu_info[][4] = | |
163 | { | |
164 | /* length max data len */ | |
165 | /* reg fmt xtd fmt class 0 */ | |
166 | /* UNUSED 0x0 */ 0x0 , 0x0, 0x0, 0x0, | |
167 | /* XPD_TPDU_type 0x1 */ 0x5, 0x8, 0x0, TP_MAX_XPD_DATA, | |
168 | /* XAK_TPDU_type 0x2 */ 0x5 , 0x8, 0x0, 0x0, | |
169 | /* GR_TPDU_type 0x3 */ 0x0 , 0x0, 0x0, 0x0, | |
170 | /* UNUSED 0x4 */ 0x0 , 0x0, 0x0, 0x0, | |
171 | /* UNUSED 0x5 */ 0x0 , 0x0, 0x0, 0x0, | |
172 | /* AK_TPDU_type 0x6 */ 0x5, 0xa, 0x0, 0x0, | |
173 | /* ER_TPDU_type 0x7 */ 0x5, 0x5, 0x0, 0x0, | |
174 | /* DR_TPDU_type 0x8 */ 0x7, 0x7, 0x7, TP_MAX_DR_DATA, | |
175 | /* UNUSED 0x9 */ 0x0 , 0x0, 0x0, 0x0, | |
176 | /* UNUSED 0xa */ 0x0 , 0x0, 0x0, 0x0, | |
177 | /* UNUSED 0xb */ 0x0 , 0x0, 0x0, 0x0, | |
178 | /* DC_TPDU_type 0xc */ 0x6, 0x6, 0x0, 0x0, | |
179 | /* CC_TPDU_type 0xd */ 0x7, 0x7, 0x7, TP_MAX_CC_DATA, | |
180 | /* CR_TPDU_type 0xe */ 0x7, 0x7, 0x7, TP_MAX_CR_DATA, | |
181 | /* DT_TPDU_type 0xf */ 0x5, 0x8, 0x3, 0x0, | |
182 | }; | |
183 | ||
facaece3 | 184 | #define CHECK(Phrase, Erval, Stat, Whattodo, Loc)\ |
c2bb180a | 185 | if (Phrase) {error = (Erval); errlen = (int)(Loc); IncStat(Stat); tpibrk();\ |
facaece3 KS |
186 | goto Whattodo; } |
187 | ||
c2bb180a KS |
188 | tpibrk() {} |
189 | ||
b7fb0758 KS |
190 | /* |
191 | * WHENEVER YOU USE THE FOLLOWING MACRO, | |
192 | * BE SURE THE TPDUTYPE IS A LEGIT VALUE FIRST! | |
193 | */ | |
194 | ||
facaece3 KS |
195 | #define WHILE_OPTIONS(P, hdr, format)\ |
196 | { register caddr_t P = tpdu_info[(hdr)->tpdu_type][(format)] + (caddr_t)hdr;\ | |
197 | caddr_t PLIM = 1 + hdr->tpdu_li + (caddr_t)hdr;\ | |
198 | for (;; P += 2 + ((struct tp_vbp *)P)->tpv_len) {\ | |
199 | CHECK((P > PLIM), E_TP_LENGTH_INVAL, ts_inv_length,\ | |
200 | respond, P - (caddr_t)hdr);\ | |
201 | if (P == PLIM) break; | |
b7fb0758 | 202 | |
facaece3 | 203 | #define END_WHILE_OPTIONS(P) } } |
b7fb0758 KS |
204 | |
205 | /* end groan */ | |
206 | ||
207 | /* | |
208 | * NAME: tp_newsocket() | |
209 | * | |
210 | * CALLED FROM: | |
211 | * tp_input() on incoming CR, when a socket w/ the called suffix | |
212 | * is awaiting a connection request | |
213 | * | |
214 | * FUNCTION and ARGUMENTS: | |
215 | * Create a new socket structure, attach to it a new transport pcb, | |
216 | * using a copy of the net level pcb for the parent socket. | |
217 | * (so) is the parent socket. | |
218 | * (fname) is the foreign address (all that's used is the nsap portion) | |
219 | * | |
220 | * RETURN VALUE: | |
221 | * a new socket structure, being this end of the newly formed connection. | |
222 | * | |
223 | * SIDE EFFECTS: | |
224 | * Sets a few things in the tpcb and net level pcb | |
225 | * | |
226 | * NOTES: | |
227 | */ | |
228 | static struct socket * | |
229 | tp_newsocket(so, fname, cons_channel, class_to_use, netservice) | |
230 | struct socket *so; | |
231 | struct sockaddr *fname; | |
01acbfa1 | 232 | caddr_t cons_channel; |
b7fb0758 KS |
233 | u_char class_to_use; |
234 | u_int netservice; | |
235 | { | |
236 | register struct tp_pcb *tpcb = sototpcb(so); /* old tpcb, needed below */ | |
194a383a | 237 | register struct tp_pcb *newtpcb; |
b7fb0758 KS |
238 | |
239 | /* | |
240 | * sonewconn() gets a new socket structure, | |
241 | * a new lower layer pcb and a new tpcb, | |
242 | * but the pcbs are unnamed (not bound) | |
243 | */ | |
244 | IFTRACE(D_NEWSOCK) | |
44f52ea5 | 245 | tptraceTPCB(TPPTmisc, "newsock: listg_so, _tpcb, so_head", |
7b25382f | 246 | so, tpcb, so->so_head, 0); |
b7fb0758 KS |
247 | ENDTRACE |
248 | ||
bb2bb663 | 249 | if ((so = sonewconn(so, SS_ISCONFIRMING)) == (struct socket *)0) |
b7fb0758 KS |
250 | return so; |
251 | IFTRACE(D_NEWSOCK) | |
44f52ea5 KS |
252 | tptraceTPCB(TPPTmisc, "newsock: after newconn so, so_head", |
253 | so, so->so_head, 0, 0); | |
b7fb0758 KS |
254 | ENDTRACE |
255 | ||
b7fb0758 | 256 | IFDEBUG(D_NEWSOCK) |
a50e2bc0 KS |
257 | printf("tp_newsocket(channel 0x%x) after sonewconn so 0x%x \n", |
258 | cons_channel, so); | |
259 | dump_addr(fname); | |
b7fb0758 KS |
260 | { |
261 | struct socket *t, *head ; | |
262 | ||
263 | head = so->so_head; | |
264 | t = so; | |
265 | printf("so 0x%x so_head 0x%x so_q0 0x%x, q0len %d\n", | |
266 | t, t->so_head, t->so_q0, t->so_q0len); | |
267 | while( (t=t->so_q0) && t!= so && t!= head) | |
268 | printf("so 0x%x so_head 0x%x so_q0 0x%x, q0len %d\n", | |
269 | t, t->so_head, t->so_q0, t->so_q0len); | |
270 | } | |
271 | ENDDEBUG | |
272 | ||
273 | /* | |
274 | * before we clobber the old tpcb ptr, get these items from the parent pcb | |
275 | */ | |
276 | newtpcb = sototpcb(so); | |
277 | newtpcb->_tp_param = tpcb->_tp_param; | |
278 | newtpcb->tp_flags = tpcb->tp_flags; | |
279 | newtpcb->tp_lcredit = tpcb->tp_lcredit; | |
280 | newtpcb->tp_l_tpdusize = tpcb->tp_l_tpdusize; | |
281 | newtpcb->tp_lsuffixlen = tpcb->tp_lsuffixlen; | |
282 | bcopy( tpcb->tp_lsuffix, newtpcb->tp_lsuffix, newtpcb->tp_lsuffixlen); | |
b7fb0758 | 283 | |
a50e2bc0 | 284 | if( /* old */ tpcb->tp_ucddata) { |
b7fb0758 | 285 | /* |
a50e2bc0 | 286 | * These data are the connect- , confirm- or disconnect- data. |
b7fb0758 KS |
287 | */ |
288 | struct mbuf *conndata; | |
289 | ||
a50e2bc0 | 290 | conndata = m_copy(tpcb->tp_ucddata, 0, (int)M_COPYALL); |
b7fb0758 KS |
291 | IFDEBUG(D_CONN) |
292 | dump_mbuf(conndata, "conndata after mcopy"); | |
b7fb0758 | 293 | ENDDEBUG |
a50e2bc0 | 294 | newtpcb->tp_ucddata = conndata; |
b7fb0758 KS |
295 | } |
296 | ||
297 | tpcb = newtpcb; | |
298 | tpcb->tp_state = TP_LISTENING; | |
299 | tpcb->tp_class = class_to_use; | |
300 | tpcb->tp_netservice = netservice; | |
301 | ||
302 | ||
303 | ASSERT( fname != 0 ) ; /* just checking */ | |
304 | if ( fname ) { | |
305 | /* | |
306 | * tp_route_to takes its address argument in the form of an mbuf. | |
307 | */ | |
308 | struct mbuf *m; | |
309 | int err; | |
310 | ||
311 | MGET(m, M_DONTWAIT, MT_SONAME); /* mbuf type used is confusing */ | |
312 | if (m) { | |
313 | /* | |
314 | * this seems a bit grotesque, but tp_route_to expects | |
315 | * an mbuf * instead of simply a sockaddr; it calls the ll | |
316 | * pcb_connect, which expects the name/addr in an mbuf as well. | |
317 | * sigh. | |
318 | */ | |
a50e2bc0 KS |
319 | bcopy((caddr_t)fname, mtod(m, caddr_t), fname->sa_len); |
320 | m->m_len = fname->sa_len; | |
b7fb0758 KS |
321 | |
322 | /* grot : have to say the kernel can override params in | |
323 | * the passive open case | |
324 | */ | |
325 | tpcb->tp_dont_change_params = 0; | |
326 | err = tp_route_to( m, tpcb, cons_channel); | |
327 | m_free(m); | |
328 | ||
329 | if (!err) | |
330 | goto ok; | |
331 | } | |
332 | IFDEBUG(D_CONN) | |
333 | printf("tp_route_to FAILED! detaching tpcb 0x%x, so 0x%x\n", | |
334 | tpcb, so); | |
335 | ENDDEBUG | |
336 | (void) tp_detach(tpcb); | |
337 | return 0; | |
338 | } | |
339 | ok: | |
340 | IFDEBUG(D_TPINPUT) | |
341 | printf("tp_newsocket returning so 0x%x, sototpcb(so) 0x%x\n", | |
342 | so, sototpcb(so)); | |
343 | ENDDEBUG | |
344 | return so; | |
345 | } | |
346 | ||
194a383a | 347 | #ifndef TPCONS |
b7fb0758 KS |
348 | tpcons_output() |
349 | { | |
350 | return(0); | |
351 | } | |
352 | #endif !CONS | |
353 | ||
354 | /* | |
355 | * NAME: tp_input() | |
356 | * | |
357 | * CALLED FROM: | |
358 | * net layer input routine | |
359 | * | |
360 | * FUNCTION and ARGUMENTS: | |
361 | * Process an incoming TPDU (m), finding the associated tpcb if there | |
362 | * is one. Create the appropriate type of event and call the driver. | |
363 | * (faddr) and (laddr) are the foreign and local addresses. | |
364 | * | |
365 | * When tp_input() is called we KNOW that the ENTIRE TP HEADER | |
366 | * has been m_pullup-ed. | |
367 | * | |
368 | * RETURN VALUE: Nada | |
369 | * | |
370 | * SIDE EFFECTS: | |
371 | * When using COSNS it may affect the state of the net-level pcb | |
372 | * | |
373 | * NOTE: | |
374 | * The initial value of acktime is 2 so that we will never | |
375 | * have a 0 value for tp_peer_acktime. It gets used in the | |
376 | * computation of the retransmission timer value, and so it | |
377 | * mustn't be zero. | |
378 | * 2 seems like a reasonable minimum. | |
379 | */ | |
380 | ProtoHook | |
20650f15 | 381 | tp_input(m, faddr, laddr, cons_channel, dgout_routine, ce_bit) |
b7fb0758 KS |
382 | register struct mbuf *m; |
383 | struct sockaddr *faddr, *laddr; /* NSAP addresses */ | |
01acbfa1 | 384 | caddr_t cons_channel; |
b7fb0758 | 385 | int (*dgout_routine)(); |
20650f15 | 386 | int ce_bit; |
b7fb0758 KS |
387 | |
388 | { | |
389 | register struct tp_pcb *tpcb = (struct tp_pcb *)0; | |
d9a01c3e | 390 | register struct tpdu *hdr; |
b7fb0758 KS |
391 | struct socket *so; |
392 | struct tp_event e; | |
facaece3 | 393 | int error = 0; |
b7fb0758 | 394 | unsigned dutype; |
facaece3 KS |
395 | u_short dref, sref = 0, acktime = 2, subseq = 0; /*VAX*/ |
396 | u_char preferred_class = 0, class_to_use = 0; | |
397 | u_char opt, dusize = TP_DFL_TPDUSIZE, addlopt = 0, version; | |
b7fb0758 | 398 | #ifdef TP_PERF_MEAS |
44f52ea5 | 399 | u_char perf_meas; |
b7fb0758 | 400 | #endif TP_PERF_MEAS |
01acbfa1 | 401 | u_char fsufxlen = 0, lsufxlen = 0; |
facaece3 KS |
402 | caddr_t fsufxloc = 0, lsufxloc = 0; |
403 | int tpdu_len = 0; | |
404 | u_int takes_data = FALSE; | |
405 | u_int fcc_present = FALSE; | |
406 | int errlen = 0; | |
b7fb0758 KS |
407 | struct tp_conn_param tpp; |
408 | int tpcons_output(); | |
409 | ||
44f52ea5 | 410 | again: |
d9a01c3e | 411 | hdr = mtod(m, struct tpdu *); |
b7fb0758 | 412 | #ifdef TP_PERF_MEAS |
44f52ea5 | 413 | GET_CUR_TIME( &e.e_time ); perf_meas = 0; |
b7fb0758 KS |
414 | #endif TP_PERF_MEAS |
415 | ||
416 | IFDEBUG(D_TPINPUT) | |
417 | printf("tp_input(0x%x, ... 0x%x)\n", m, cons_channel); | |
418 | ENDDEBUG | |
419 | ||
b7fb0758 | 420 | |
b7fb0758 KS |
421 | /* |
422 | * get the actual tpdu length - necessary for monitoring | |
423 | * and for checksumming | |
424 | * | |
425 | * Also, maybe measure the mbuf chain lengths and sizes. | |
426 | */ | |
427 | ||
428 | { register struct mbuf *n=m; | |
429 | # ifdef ARGO_DEBUG | |
430 | int chain_length = 0; | |
431 | # endif ARGO_DEBUG | |
432 | ||
433 | for(;;) { | |
434 | tpdu_len += n->m_len; | |
435 | IFDEBUG(D_MBUF_MEAS) | |
a50e2bc0 | 436 | if( n->m_flags & M_EXT) { |
b7fb0758 KS |
437 | IncStat(ts_mb_cluster); |
438 | } else { | |
439 | IncStat(ts_mb_small); | |
440 | } | |
441 | chain_length ++; | |
442 | ENDDEBUG | |
443 | if (n->m_next == MNULL ) { | |
444 | break; | |
445 | } | |
446 | n = n->m_next; | |
447 | } | |
448 | IFDEBUG(D_MBUF_MEAS) | |
449 | if(chain_length > 16) | |
450 | chain_length = 0; /* zero used for anything > 16 */ | |
451 | tp_stat.ts_mb_len_distr[chain_length] ++; | |
452 | ENDDEBUG | |
453 | } | |
454 | IFTRACE(D_TPINPUT) | |
455 | tptraceTPCB(TPPTtpduin, hdr->tpdu_type, hdr, hdr->tpdu_li+1, tpdu_len, | |
456 | 0); | |
457 | ENDTRACE | |
458 | ||
459 | dref = ntohs((short)hdr->tpdu_dref); | |
460 | sref = ntohs((short)hdr->tpdu_sref); | |
461 | dutype = (int)hdr->tpdu_type; | |
462 | ||
463 | IFDEBUG(D_TPINPUT) | |
464 | printf("input: dutype 0x%x cons_channel 0x%x dref 0x%x\n", dutype, | |
465 | cons_channel, dref); | |
466 | printf("input: dref 0x%x sref 0x%x\n", dref, sref); | |
467 | ENDDEBUG | |
468 | IFTRACE(D_TPINPUT) | |
469 | tptrace(TPPTmisc, "channel dutype dref ", | |
470 | cons_channel, dutype, dref, 0); | |
471 | ENDTRACE | |
472 | ||
473 | ||
474 | #ifdef ARGO_DEBUG | |
475 | if( (dutype < TP_MIN_TPDUTYPE) || (dutype > TP_MAX_TPDUTYPE)) { | |
476 | printf("BAD dutype! 0x%x, channel 0x%x dref 0x%x\n", | |
477 | dutype, cons_channel, dref); | |
478 | dump_buf (m, sizeof( struct mbuf )); | |
479 | ||
480 | IncStat(ts_inv_dutype); | |
481 | goto discard; | |
482 | } | |
483 | #endif ARGO_DEBUG | |
484 | ||
485 | CHECK( (dutype < TP_MIN_TPDUTYPE || dutype > TP_MAX_TPDUTYPE), | |
486 | E_TP_INV_TPDU, ts_inv_dutype, respond, | |
487 | 2 ); | |
488 | /* unfortunately we can't take the address of the tpdu_type field, | |
489 | * since it's a bit field - so we just use the constant offset 2 | |
490 | */ | |
491 | ||
492 | /* Now this isn't very neat but since you locate a pcb one way | |
493 | * at the beginning of connection establishment, and by | |
494 | * the dref for each tpdu after that, we have to treat CRs differently | |
495 | */ | |
496 | if ( dutype == CR_TPDU_type ) { | |
497 | u_char alt_classes = 0; | |
498 | ||
a50e2bc0 | 499 | preferred_class = 1 << hdr->tpdu_CRclass; |
b7fb0758 KS |
500 | opt = hdr->tpdu_CRoptions; |
501 | ||
502 | WHILE_OPTIONS(P, hdr, 1 ) /* { */ | |
503 | ||
504 | switch( vbptr(P)->tpv_code ) { | |
505 | ||
506 | case TPP_tpdu_size: | |
507 | vb_getval(P, u_char, dusize); | |
508 | IFDEBUG(D_TPINPUT) | |
509 | printf("CR dusize 0x%x\n", dusize); | |
510 | ENDDEBUG | |
facaece3 KS |
511 | /* COS tests: NBS IA (Dec. 1987) Sec. 4.5.2.1 */ |
512 | if (dusize < TP_MIN_TPDUSIZE || dusize > TP_MAX_TPDUSIZE) | |
513 | dusize = TP_DFL_TPDUSIZE; | |
b7fb0758 KS |
514 | break; |
515 | case TPP_addl_opt: | |
516 | vb_getval(P, u_char, addlopt); | |
517 | break; | |
518 | case TPP_calling_sufx: | |
519 | /* could use vb_getval, but we want to save the loc & len | |
520 | * for later use | |
521 | */ | |
522 | fsufxloc = (caddr_t) &vbptr(P)->tpv_val; | |
523 | fsufxlen = vbptr(P)->tpv_len; | |
524 | IFDEBUG(D_TPINPUT) | |
525 | printf("CR fsufx:"); | |
526 | { register int j; | |
527 | for(j=0; j<fsufxlen; j++ ) { | |
528 | printf(" 0x%x. ", *((caddr_t)(fsufxloc+j)) ); | |
529 | } | |
530 | printf("\n"); | |
531 | } | |
532 | ENDDEBUG | |
533 | break; | |
534 | case TPP_called_sufx: | |
535 | /* could use vb_getval, but we want to save the loc & len | |
536 | * for later use | |
537 | */ | |
538 | lsufxloc = (caddr_t) &vbptr(P)->tpv_val; | |
539 | lsufxlen = vbptr(P)->tpv_len; | |
540 | IFDEBUG(D_TPINPUT) | |
541 | printf("CR lsufx:"); | |
542 | { register int j; | |
543 | for(j=0; j<lsufxlen; j++ ) { | |
a50e2bc0 | 544 | printf(" 0x%x. ", *((u_char *)(lsufxloc+j)) ); |
b7fb0758 KS |
545 | } |
546 | printf("\n"); | |
547 | } | |
548 | ENDDEBUG | |
549 | break; | |
550 | ||
551 | #ifdef TP_PERF_MEAS | |
552 | case TPP_perf_meas: | |
553 | vb_getval(P, u_char, perf_meas); | |
554 | break; | |
555 | #endif TP_PERF_MEAS | |
556 | ||
557 | case TPP_vers: | |
558 | /* not in class 0; 1 octet; in CR_TPDU only */ | |
facaece3 | 559 | /* COS tests says if version wrong, use default version!?XXX */ |
b7fb0758 | 560 | CHECK( (vbval(P, u_char) != TP_VERSION ), |
10c42688 | 561 | E_TP_INV_PVAL, ts_inv_pval, setversion, |
facaece3 | 562 | (1 + (caddr_t)&vbptr(P)->tpv_val - (caddr_t)hdr) ); |
10c42688 KS |
563 | setversion: |
564 | version = vbval(P, u_char); | |
b7fb0758 KS |
565 | break; |
566 | case TPP_acktime: | |
567 | vb_getval(P, u_short, acktime); | |
568 | acktime = ntohs(acktime); | |
569 | acktime = acktime/500; /* convert to slowtimo ticks */ | |
570 | if((short)acktime <=0 ) | |
571 | acktime = 2; /* don't allow a bad peer to screw us up */ | |
572 | IFDEBUG(D_TPINPUT) | |
573 | printf("CR acktime 0x%x\n", acktime); | |
574 | ENDDEBUG | |
575 | break; | |
576 | ||
577 | case TPP_alt_class: | |
578 | { | |
579 | u_char *aclass = 0; | |
580 | register int i; | |
facaece3 KS |
581 | static u_char bad_alt_classes[5] = |
582 | { ~0, ~3, ~5, ~0xf, ~0x1f}; | |
b7fb0758 | 583 | |
facaece3 KS |
584 | aclass = |
585 | (u_char *) &(((struct tp_vbp *)P)->tpv_val); | |
b7fb0758 | 586 | for (i = ((struct tp_vbp *)P)->tpv_len; i>0; i--) { |
facaece3 | 587 | alt_classes |= (1<<((*aclass++)>>4)); |
b7fb0758 | 588 | } |
facaece3 KS |
589 | CHECK( (bad_alt_classes[hdr->tpdu_CRclass] & alt_classes), |
590 | E_TP_INV_PVAL, ts_inv_aclass, respond, | |
591 | ((caddr_t)aclass) - (caddr_t)hdr); | |
b7fb0758 KS |
592 | IFDEBUG(D_TPINPUT) |
593 | printf("alt_classes 0x%x\n", alt_classes); | |
594 | ENDDEBUG | |
595 | } | |
596 | break; | |
597 | ||
598 | case TPP_security: | |
599 | case TPP_residER: | |
600 | case TPP_priority: | |
601 | case TPP_transdelay: | |
602 | case TPP_throughput: | |
603 | case TPP_addl_info: | |
604 | case TPP_subseq: | |
d9a01c3e | 605 | default: |
b7fb0758 KS |
606 | IFDEBUG(D_TPINPUT) |
607 | printf("param ignored CR_TPDU code= 0x%x\n", | |
608 | vbptr(P)->tpv_code); | |
609 | ENDDEBUG | |
610 | IncStat(ts_param_ignored); | |
611 | break; | |
612 | ||
613 | case TPP_checksum: | |
614 | IFDEBUG(D_TPINPUT) | |
615 | printf("CR before cksum\n"); | |
616 | ENDDEBUG | |
617 | ||
618 | CHECK( iso_check_csum(m, tpdu_len), | |
619 | E_TP_INV_PVAL, ts_bad_csum, discard, 0) | |
620 | ||
621 | IFDEBUG(D_TPINPUT) | |
622 | printf("CR before cksum\n"); | |
623 | ENDDEBUG | |
624 | break; | |
b7fb0758 KS |
625 | } |
626 | ||
627 | /* } */ END_WHILE_OPTIONS(P) | |
628 | ||
63f88aec | 629 | if (lsufxlen == 0) { |
b7fb0758 KS |
630 | /* can't look for a tpcb w/o any called sufx */ |
631 | error = E_TP_LENGTH_INVAL; | |
632 | IncStat(ts_inv_sufx); | |
633 | goto respond; | |
634 | } else { | |
63f88aec | 635 | register struct tp_pcb *t; |
01acbfa1 KS |
636 | /* |
637 | * The intention here is to trap all CR requests | |
638 | * to a given nsap, for constructing transport | |
639 | * service bridges at user level; so these | |
640 | * intercepts should precede the normal listens. | |
641 | * Phrasing the logic in this way also allows for | |
642 | * mop-up listeners, which we don't currently implement. | |
643 | * We also wish to have a single socket be able to | |
644 | * listen over any network service provider, | |
645 | * (cons or clns or ip). | |
646 | */ | |
823532e9 | 647 | for (t = tp_listeners; t ; t = t->tp_nextlisten) |
01acbfa1 KS |
648 | if ((t->tp_lsuffixlen == 0 || |
649 | (lsufxlen == t->tp_lsuffixlen && | |
650 | bcmp(lsufxloc, t->tp_lsuffix, lsufxlen) == 0)) && | |
651 | ((t->tp_flags & TPF_GENERAL_ADDR) || | |
652 | (laddr->sa_family == t->tp_domain && | |
653 | (*t->tp_nlproto->nlp_cmpnetaddr) | |
654 | (t->tp_npcb, laddr, TP_LOCAL)))) | |
655 | break; | |
656 | ||
63f88aec | 657 | CHECK(t == 0, E_TP_NO_SESSION, ts_inv_sufx, respond, |
b7fb0758 KS |
658 | (1 + 2 + (caddr_t)&hdr->_tpduf - (caddr_t)hdr)) |
659 | /* _tpduf is the fixed part; add 2 to get the dref bits of | |
660 | * the fixed part (can't take the address of a bit field) | |
661 | */ | |
823532e9 KS |
662 | IFDEBUG(D_TPINPUT) |
663 | printf("checking if dup CR\n"); | |
664 | ENDDEBUG | |
63f88aec KS |
665 | tpcb = t; |
666 | for (t = tpcb->tp_next; t != tpcb; t = t->tp_next) { | |
667 | if (sref != t->tp_fref) | |
668 | continue; | |
669 | if ((*tpcb->tp_nlproto->nlp_cmpnetaddr)( | |
670 | t->tp_npcb, faddr, TP_FOREIGN)) { | |
671 | IFDEBUG(D_TPINPUT) | |
672 | printf("duplicate CR discarded\n"); | |
673 | ENDDEBUG | |
674 | goto discard; | |
675 | } | |
676 | } | |
677 | IFTRACE(D_TPINPUT) | |
678 | tptrace(TPPTmisc, "tp_input: tpcb *lsufxloc tpstate", | |
679 | tpcb, *lsufxloc, tpcb->tp_state, 0); | |
680 | ENDTRACE | |
b7fb0758 KS |
681 | } |
682 | ||
683 | /* | |
684 | * WE HAVE A TPCB | |
685 | * already know that the classes in the CR match at least | |
686 | * one class implemented, but we don't know yet if they | |
687 | * include any classes permitted by this server. | |
688 | */ | |
689 | ||
690 | IFDEBUG(D_TPINPUT) | |
691 | printf("HAVE A TPCB 1: 0x%x\n", tpcb); | |
692 | ENDDEBUG | |
693 | IFDEBUG(D_CONN) | |
694 | printf( | |
695 | "CR: bef CHKS: flags 0x%x class_to_use 0x%x alt 0x%x opt 0x%x tp_class 0x%x\n", | |
696 | tpcb->tp_flags, class_to_use, alt_classes, opt, tpcb->tp_class); | |
697 | ENDDEBUG | |
698 | /* tpcb->tp_class doesn't include any classes not implemented */ | |
699 | class_to_use = (preferred_class & tpcb->tp_class); | |
700 | if( (class_to_use = preferred_class & tpcb->tp_class) == 0 ) | |
701 | class_to_use = alt_classes & tpcb->tp_class; | |
702 | ||
703 | class_to_use = 1 << tp_mask_to_num(class_to_use); | |
704 | ||
705 | { | |
706 | tpp = tpcb->_tp_param; | |
707 | tpp.p_class = class_to_use; | |
708 | tpp.p_tpdusize = dusize; | |
709 | tpp.p_xtd_format = (opt & TPO_XTD_FMT) == TPO_XTD_FMT; | |
710 | tpp.p_xpd_service = (addlopt & TPAO_USE_TXPD) == TPAO_USE_TXPD; | |
711 | tpp.p_use_checksum = (tpp.p_class == TP_CLASS_0)?0: | |
712 | (addlopt & TPAO_NO_CSUM) == 0; | |
10c42688 | 713 | tpp.p_version = version; |
b7fb0758 KS |
714 | #ifdef notdef |
715 | tpp.p_use_efc = (opt & TPO_USE_EFC) == TPO_USE_EFC; | |
716 | tpp.p_use_nxpd = (addlopt & TPAO_USE_NXPD) == TPAO_USE_NXPD; | |
717 | tpp.p_use_rcc = (addlopt & TPAO_USE_RCC) == TPAO_USE_RCC; | |
718 | #endif notdef | |
719 | ||
720 | CHECK( | |
721 | tp_consistency(tpcb, 0 /* not force or strict */, &tpp) != 0, | |
01acbfa1 | 722 | E_TP_NEGOT_FAILED, ts_negotfailed, clear_parent_tcb, |
b7fb0758 KS |
723 | (1 + 2 + (caddr_t)&hdr->_tpdufr.CRCC - (caddr_t)hdr) |
724 | /* ^ more or less the location of class */ | |
725 | ) | |
726 | } | |
727 | IFTRACE(D_CONN) | |
728 | tptrace(TPPTmisc, | |
729 | "after 1 consist class_to_use class, out, tpconsout", | |
730 | class_to_use, | |
731 | tpcb->tp_class, dgout_routine, tpcons_output | |
732 | ); | |
733 | ENDTRACE | |
734 | CHECK( | |
735 | ((class_to_use == TP_CLASS_0)&&(dgout_routine != tpcons_output)), | |
01acbfa1 | 736 | E_TP_NEGOT_FAILED, ts_negotfailed, clear_parent_tcb, |
b7fb0758 KS |
737 | (1 + 2 + (caddr_t)&hdr->_tpdufr.CRCC - (caddr_t)hdr) |
738 | /* ^ more or less the location of class */ | |
739 | ) | |
740 | IFDEBUG(D_CONN) | |
741 | printf("CR: after CRCCCHECKS: tpcb 0x%x, flags 0x%x\n", | |
742 | tpcb, tpcb->tp_flags); | |
743 | ENDDEBUG | |
744 | takes_data = TRUE; | |
745 | e.ATTR(CR_TPDU).e_cdt = hdr->tpdu_CRcdt; | |
746 | e.ev_number = CR_TPDU; | |
747 | ||
748 | so = tpcb->tp_sock; | |
749 | if (so->so_options & SO_ACCEPTCONN) { | |
63f88aec | 750 | struct tp_pcb *parent_tpcb = tpcb; |
b7fb0758 KS |
751 | /* |
752 | * Create a socket, tpcb, ll pcb, etc. | |
753 | * for this newborn connection, and fill in all the values. | |
754 | */ | |
755 | IFDEBUG(D_CONN) | |
756 | printf("abt to call tp_newsocket(0x%x, 0x%x, 0x%x, 0x%x)\n", | |
757 | so, laddr, faddr, cons_channel); | |
758 | ENDDEBUG | |
759 | if( (so = | |
760 | tp_newsocket(so, faddr, cons_channel, | |
761 | class_to_use, | |
a50e2bc0 KS |
762 | ((tpcb->tp_netservice == IN_CLNS) ? IN_CLNS : |
763 | (dgout_routine == tpcons_output)?ISO_CONS:ISO_CLNS)) | |
b7fb0758 KS |
764 | ) == (struct socket *)0 ) { |
765 | /* note - even if netservice is IN_CLNS, as far as | |
766 | * the tp entity is concerned, the only differences | |
a50e2bc0 | 767 | * are CO vs CL |
b7fb0758 KS |
768 | */ |
769 | IFDEBUG(D_CONN) | |
770 | printf("tp_newsocket returns 0\n"); | |
771 | ENDDEBUG | |
772 | goto discard; | |
01acbfa1 KS |
773 | clear_parent_tcb: |
774 | tpcb = 0; | |
775 | goto respond; | |
b7fb0758 KS |
776 | } |
777 | tpcb = sototpcb(so); | |
823532e9 | 778 | insque(tpcb, parent_tpcb); |
b7fb0758 | 779 | |
b7fb0758 | 780 | /* |
a50e2bc0 | 781 | * Stash the addresses in the net level pcb |
b7fb0758 KS |
782 | * kind of like a pcbconnect() but don't need |
783 | * or want all those checks. | |
784 | */ | |
f15f73d2 KS |
785 | (tpcb->tp_nlproto->nlp_putnetaddr)(tpcb->tp_npcb, faddr, TP_FOREIGN); |
786 | (tpcb->tp_nlproto->nlp_putnetaddr)(tpcb->tp_npcb, laddr, TP_LOCAL); | |
b7fb0758 | 787 | |
a50e2bc0 | 788 | /* stash the f suffix in the new tpcb */ |
01acbfa1 KS |
789 | if (tpcb->tp_fsuffixlen = fsufxlen) { |
790 | bcopy(fsufxloc, tpcb->tp_fsuffix, fsufxlen); | |
791 | (tpcb->tp_nlproto->nlp_putsufx) | |
792 | (tpcb->tp_npcb, fsufxloc, fsufxlen, TP_FOREIGN); | |
793 | } | |
794 | /* stash the l suffix in the new tpcb */ | |
795 | tpcb->tp_lsuffixlen = lsufxlen; | |
796 | bcopy(lsufxloc, tpcb->tp_lsuffix, lsufxlen); | |
44f52ea5 | 797 | (tpcb->tp_nlproto->nlp_putsufx) |
f15f73d2 | 798 | (tpcb->tp_npcb, lsufxloc, lsufxlen, TP_LOCAL); |
b7fb0758 KS |
799 | #ifdef TP_PERF_MEAS |
800 | if( tpcb->tp_perf_on = perf_meas ) { /* assignment */ | |
801 | /* ok, let's create an mbuf for stashing the | |
802 | * statistics if one doesn't already exist | |
803 | */ | |
804 | (void) tp_setup_perf(tpcb); | |
805 | } | |
806 | #endif TP_PERF_MEAS | |
807 | tpcb->tp_fref = sref; | |
808 | ||
809 | /* We've already checked for consistency with the options | |
810 | * set in tpp, but we couldn't set them earlier because | |
811 | * we didn't want to change options in the LISTENING tpcb. | |
812 | * Now we set the options in the new socket's tpcb. | |
813 | */ | |
814 | (void) tp_consistency( tpcb, TP_FORCE, &tpp); | |
815 | ||
816 | if(!tpcb->tp_use_checksum) | |
817 | IncStat(ts_csum_off); | |
818 | if(tpcb->tp_xpd_service) | |
819 | IncStat(ts_use_txpd); | |
820 | if(tpcb->tp_xtd_format) | |
821 | IncStat(ts_xtd_fmt); | |
822 | ||
b7fb0758 KS |
823 | tpcb->tp_peer_acktime = acktime; |
824 | ||
825 | /* | |
826 | * The following kludge is used to test retransmissions and | |
827 | * timeout during connection establishment. | |
828 | */ | |
829 | IFDEBUG(D_ZDREF) | |
830 | IncStat(ts_zdebug); | |
a50e2bc0 | 831 | /*tpcb->tp_fref = 0;*/ |
b7fb0758 KS |
832 | ENDDEBUG |
833 | } | |
834 | IncStat(ts_CR_rcvd); | |
20650f15 KS |
835 | if (!tpcb->tp_cebit_off) { |
836 | tpcb->tp_win_recv = tp_start_win << 8; | |
837 | tpcb->tp_cong_sample.cs_size = 0; | |
838 | LOCAL_CREDIT(tpcb); | |
839 | CONG_INIT_SAMPLE(tpcb); | |
840 | CONG_UPDATE_SAMPLE(tpcb, ce_bit); | |
841 | } | |
b7fb0758 KS |
842 | } else if ( dutype == ER_TPDU_type ) { |
843 | /* | |
844 | * ER TPDUs have to be recognized separately | |
845 | * because they don't necessarily have a tpcb | |
846 | * with them and we don't want err out looking for such | |
847 | * a beast. | |
848 | * We could put a bunch of little kludges in the | |
849 | * next section of code so it would avoid references to tpcb | |
850 | * if dutype == ER_TPDU_type but we don't want code for ERs to | |
851 | * mess up code for data transfer. | |
852 | */ | |
853 | IncStat(ts_ER_rcvd); | |
854 | e.ev_number = ER_TPDU; | |
855 | e.ATTR(ER_TPDU).e_reason = (u_char)hdr->tpdu_ERreason; | |
3a2fbed9 | 856 | CHECK (((int)dref <= 0 || dref >= tp_refinfo.tpr_size || |
0b673a61 | 857 | (tpcb = tp_ref[dref].tpr_pcb ) == (struct tp_pcb *) 0 || |
bdf41b09 KS |
858 | tpcb->tp_refstate == REF_FREE || |
859 | tpcb->tp_refstate == REF_FROZEN), | |
0b673a61 KS |
860 | E_TP_MISM_REFS, ts_inv_dref, discard, 0) |
861 | ||
b7fb0758 KS |
862 | } else { |
863 | /* tpdu type is CC, XPD, XAK, GR, AK, DR, DC, or DT */ | |
864 | ||
865 | /* In the next 4 checks, | |
866 | * _tpduf is the fixed part; add 2 to get the dref bits of | |
867 | * the fixed part (can't take the address of a bit field) | |
868 | */ | |
01acbfa1 KS |
869 | #ifdef TPCONS |
870 | if (cons_channel && dutype == DT_TPDU_type) { | |
871 | struct isopcb *isop = ((struct isopcb *) | |
872 | ((struct pklcd *)cons_channel)->lcd_upnext); | |
873 | if (isop && isop->isop_refcnt == 1 && isop->isop_socket && | |
874 | (tpcb = sototpcb(isop->isop_socket)) && | |
875 | (tpcb->tp_class == TP_CLASS_0/* || == CLASS_1 */)) { | |
876 | IFDEBUG(D_TPINPUT) | |
877 | printf("tpinput_dt: class 0 short circuit\n"); | |
878 | ENDDEBUG | |
879 | dref = tpcb->tp_lref; | |
880 | sref = tpcb->tp_fref; | |
bdf41b09 | 881 | CHECK( (tpcb->tp_refstate == REF_FREE), |
01acbfa1 KS |
882 | E_TP_MISM_REFS,ts_inv_dref, nonx_dref, |
883 | (1 + 2 + (caddr_t)&hdr->_tpduf - (caddr_t)hdr)) | |
884 | goto tp0_data; | |
885 | } | |
b7fb0758 | 886 | |
01acbfa1 | 887 | } |
194a383a | 888 | #endif |
194a383a | 889 | { |
b7fb0758 | 890 | |
3a2fbed9 | 891 | CHECK( ((int)dref <= 0 || dref >= tp_refinfo.tpr_size) , |
facaece3 | 892 | E_TP_MISM_REFS,ts_inv_dref, nonx_dref, |
b7fb0758 KS |
893 | (1 + 2 + (caddr_t)&hdr->_tpduf - (caddr_t)hdr)) |
894 | CHECK( ((tpcb = tp_ref[dref].tpr_pcb ) == (struct tp_pcb *) 0 ), | |
facaece3 | 895 | E_TP_MISM_REFS,ts_inv_dref, nonx_dref, |
b7fb0758 | 896 | (1 + 2 + (caddr_t)&hdr->_tpduf - (caddr_t)hdr)) |
bdf41b09 | 897 | CHECK( (tpcb->tp_refstate == REF_FREE), |
facaece3 | 898 | E_TP_MISM_REFS,ts_inv_dref, nonx_dref, |
b7fb0758 KS |
899 | (1 + 2 + (caddr_t)&hdr->_tpduf - (caddr_t)hdr)) |
900 | } | |
901 | ||
902 | IFDEBUG(D_TPINPUT) | |
903 | printf("HAVE A TPCB 2: 0x%x\n", tpcb); | |
904 | ENDDEBUG | |
905 | ||
906 | /* causes a DR to be sent for CC; ER for all else */ | |
bdf41b09 | 907 | CHECK( (tpcb->tp_refstate == REF_FROZEN), |
b7fb0758 KS |
908 | (dutype == CC_TPDU_type?E_TP_NO_SESSION:E_TP_MISM_REFS), |
909 | ts_inv_dref, respond, | |
910 | (1 + 2 + (caddr_t)&hdr->_tpduf - (caddr_t)hdr)) | |
911 | ||
912 | IFDEBUG(D_TPINPUT) | |
913 | printf("state of dref %d ok, tpcb 0x%x\n", dref,tpcb); | |
914 | ENDDEBUG | |
915 | /* | |
916 | * At this point the state of the dref could be | |
917 | * FROZEN: tpr_pcb == NULL, has ( reference only) timers | |
918 | * for example, DC may arrive after the close() has detached | |
919 | * the tpcb (e.g., if user turned off SO_LISTEN option) | |
920 | * OPENING : a tpcb exists but no timers yet | |
921 | * OPEN : tpcb exists & timers are outstanding | |
922 | */ | |
923 | ||
20650f15 KS |
924 | if (!tpcb->tp_cebit_off) |
925 | CONG_UPDATE_SAMPLE(tpcb, ce_bit); | |
926 | ||
b7fb0758 KS |
927 | dusize = tpcb->tp_tpdusize; |
928 | ||
929 | dutype = hdr->tpdu_type << 8; /* for the switch below */ | |
930 | ||
931 | WHILE_OPTIONS(P, hdr, tpcb->tp_xtd_format) /* { */ | |
932 | ||
a50e2bc0 | 933 | #define caseof(x,y) case (((x)<<8)+(y)) |
b7fb0758 KS |
934 | switch( dutype | vbptr(P)->tpv_code ) { |
935 | ||
936 | caseof( CC_TPDU_type, TPP_addl_opt ): | |
937 | /* not in class 0; 1 octet */ | |
938 | vb_getval(P, u_char, addlopt); | |
939 | break; | |
940 | caseof( CC_TPDU_type, TPP_tpdu_size ): | |
facaece3 KS |
941 | { |
942 | u_char odusize = dusize; | |
b7fb0758 | 943 | vb_getval(P, u_char, dusize); |
facaece3 KS |
944 | CHECK( (dusize < TP_MIN_TPDUSIZE || |
945 | dusize > TP_MAX_TPDUSIZE || dusize > odusize), | |
946 | E_TP_INV_PVAL, ts_inv_pval, respond, | |
947 | (1 + (caddr_t)&vbptr(P)->tpv_val - (caddr_t)hdr) ) | |
b7fb0758 KS |
948 | IFDEBUG(D_TPINPUT) |
949 | printf("CC dusize 0x%x\n", dusize); | |
950 | ENDDEBUG | |
facaece3 | 951 | } |
b7fb0758 KS |
952 | break; |
953 | caseof( CC_TPDU_type, TPP_calling_sufx): | |
954 | IFDEBUG(D_TPINPUT) | |
955 | printf("CC calling (local) sufxlen 0x%x\n", lsufxlen); | |
956 | ENDDEBUG | |
957 | lsufxloc = (caddr_t) &vbptr(P)->tpv_val; | |
958 | lsufxlen = vbptr(P)->tpv_len; | |
959 | break; | |
960 | caseof( CC_TPDU_type, TPP_acktime ): | |
961 | /* class 4 only, 2 octets */ | |
962 | vb_getval(P, u_short, acktime); | |
d9a01c3e | 963 | acktime = ntohs(acktime); |
b7fb0758 KS |
964 | acktime = acktime/500; /* convert to slowtimo ticks */ |
965 | if( (short)acktime <=0 ) | |
966 | acktime = 2; | |
967 | break; | |
968 | caseof( CC_TPDU_type, TPP_called_sufx): | |
969 | fsufxloc = (caddr_t) &vbptr(P)->tpv_val; | |
970 | fsufxlen = vbptr(P)->tpv_len; | |
971 | IFDEBUG(D_TPINPUT) | |
972 | printf("CC called (foreign) sufx len %d\n", fsufxlen); | |
973 | ENDDEBUG | |
974 | break; | |
975 | ||
976 | caseof( CC_TPDU_type, TPP_checksum): | |
977 | caseof( DR_TPDU_type, TPP_checksum): | |
978 | caseof( DT_TPDU_type, TPP_checksum): | |
979 | caseof( XPD_TPDU_type, TPP_checksum): | |
980 | if( tpcb->tp_use_checksum ) { | |
981 | CHECK( iso_check_csum(m, tpdu_len), | |
982 | E_TP_INV_PVAL, ts_bad_csum, discard, 0) | |
983 | } | |
984 | break; | |
985 | ||
986 | /* this is different from the above because in the context | |
987 | * of concat/ sep tpdu_len might not be the same as hdr len | |
988 | */ | |
989 | caseof( AK_TPDU_type, TPP_checksum): | |
990 | caseof( XAK_TPDU_type, TPP_checksum): | |
991 | caseof( DC_TPDU_type, TPP_checksum): | |
992 | if( tpcb->tp_use_checksum ) { | |
a50e2bc0 | 993 | CHECK( iso_check_csum(m, (int)hdr->tpdu_li + 1), |
b7fb0758 KS |
994 | E_TP_INV_PVAL, ts_bad_csum, discard, 0) |
995 | } | |
996 | break; | |
997 | #ifdef notdef | |
998 | caseof( DR_TPDU_type, TPP_addl_info ): | |
999 | /* ignore - its length and meaning are | |
1000 | * user defined and there's no way | |
1001 | * to pass this info to the user anyway | |
1002 | */ | |
1003 | break; | |
1004 | #endif notdef | |
1005 | ||
1006 | caseof( AK_TPDU_type, TPP_subseq ): | |
1007 | /* used after reduction of window */ | |
1008 | vb_getval(P, u_short, subseq); | |
1009 | subseq = ntohs(subseq); | |
1010 | IFDEBUG(D_ACKRECV) | |
bdf41b09 | 1011 | printf("AK dref 0x%x Subseq 0x%x\n", dref, subseq); |
b7fb0758 KS |
1012 | ENDDEBUG |
1013 | break; | |
1014 | ||
1015 | caseof( AK_TPDU_type, TPP_flow_cntl_conf ): | |
1016 | { | |
1017 | u_int ylwe; | |
1018 | u_short ysubseq, ycredit; | |
1019 | ||
1020 | fcc_present = TRUE; | |
1021 | vb_getval(P, u_int, ylwe); | |
1022 | vb_getval(P, u_short, ysubseq); | |
1023 | vb_getval(P, u_short, ycredit); | |
1024 | ylwe = ntohl(ylwe); | |
1025 | ysubseq = ntohs(ysubseq); | |
1026 | ycredit = ntohs(ycredit); | |
1027 | IFDEBUG(D_ACKRECV) | |
bdf41b09 KS |
1028 | printf("%s%x, subseq 0x%x, cdt 0x%x dref 0x%x\n", |
1029 | "AK FCC lwe 0x", ylwe, ysubseq, ycredit, dref); | |
b7fb0758 KS |
1030 | ENDDEBUG |
1031 | } | |
1032 | break; | |
1033 | ||
1034 | default: | |
1035 | IFDEBUG(D_TPINPUT) | |
1036 | printf("param ignored dutype 0x%x, code 0x%x\n", | |
1037 | dutype, vbptr(P)->tpv_code); | |
1038 | ENDDEBUG | |
1039 | IFTRACE(D_TPINPUT) | |
1040 | tptrace(TPPTmisc, "param ignored dutype code ", | |
1041 | dutype, vbptr(P)->tpv_code ,0,0); | |
1042 | ENDTRACE | |
1043 | IncStat(ts_param_ignored); | |
1044 | break; | |
1045 | #undef caseof | |
1046 | } | |
1047 | /* } */ END_WHILE_OPTIONS(P) | |
1048 | ||
1049 | /* NOTE: the variable dutype has been shifted left! */ | |
1050 | ||
1051 | switch( hdr->tpdu_type ) { | |
1052 | case CC_TPDU_type: | |
1053 | /* If CC comes back with an unacceptable class | |
1054 | * respond with a DR or ER | |
1055 | */ | |
1056 | ||
1057 | opt = hdr->tpdu_CCoptions; /* 1 byte */ | |
1058 | ||
1059 | { | |
1060 | tpp = tpcb->_tp_param; | |
1061 | tpp.p_class = (1<<hdr->tpdu_CCclass); | |
1062 | tpp.p_tpdusize = dusize; | |
1063 | tpp.p_dont_change_params = 0; | |
1064 | tpp.p_xtd_format = (opt & TPO_XTD_FMT) == TPO_XTD_FMT; | |
1065 | tpp.p_xpd_service = (addlopt & TPAO_USE_TXPD) == TPAO_USE_TXPD; | |
1066 | tpp.p_use_checksum = (addlopt & TPAO_NO_CSUM) == 0; | |
1067 | #ifdef notdef | |
1068 | tpp.p_use_efc = (opt & TPO_USE_EFC) == TPO_USE_EFC; | |
1069 | tpp.p_use_nxpd = (addlopt & TPAO_USE_NXPD) == TPAO_USE_NXPD; | |
1070 | tpp.p_use_rcc = (addlopt & TPAO_USE_RCC) == TPAO_USE_RCC; | |
1071 | #endif notdef | |
1072 | ||
1073 | CHECK( | |
1074 | tp_consistency(tpcb, TP_FORCE, &tpp) != 0, | |
1075 | E_TP_NEGOT_FAILED, ts_negotfailed, respond, | |
1076 | (1 + 2 + (caddr_t)&hdr->_tpdufr.CRCC - (caddr_t)hdr) | |
1077 | /* ^ more or less the location of class */ | |
1078 | ) | |
1079 | IFTRACE(D_CONN) | |
1080 | tptrace(TPPTmisc, | |
1081 | "after 1 consist class, out, tpconsout", | |
1082 | tpcb->tp_class, dgout_routine, tpcons_output, 0 | |
1083 | ); | |
1084 | ENDTRACE | |
1085 | CHECK( | |
1086 | ((class_to_use == TP_CLASS_0)&& | |
1087 | (dgout_routine != tpcons_output)), | |
1088 | E_TP_NEGOT_FAILED, ts_negotfailed, respond, | |
1089 | (1 + 2 + (caddr_t)&hdr->_tpdufr.CRCC - (caddr_t)hdr) | |
1090 | /* ^ more or less the location of class */ | |
1091 | ) | |
194a383a KS |
1092 | #ifdef TPCONS |
1093 | if (tpcb->tp_netservice == ISO_CONS && | |
1094 | class_to_use == TP_CLASS_0) { | |
1095 | struct isopcb *isop = (struct isopcb *)tpcb->tp_npcb; | |
1096 | struct pklcd *lcp = (struct pklcd *)isop->isop_chan; | |
1097 | lcp->lcd_flags &= ~X25_DG_CIRCUIT; | |
1098 | } | |
1099 | #endif | |
b7fb0758 KS |
1100 | } |
1101 | if( ! tpcb->tp_use_checksum) | |
1102 | IncStat(ts_csum_off); | |
1103 | if(tpcb->tp_xpd_service) | |
1104 | IncStat(ts_use_txpd); | |
1105 | if(tpcb->tp_xtd_format) | |
1106 | IncStat(ts_xtd_fmt); | |
1107 | ||
1108 | IFTRACE(D_CONN) | |
1109 | tptrace(TPPTmisc, "after CC class flags dusize CCclass", | |
1110 | tpcb->tp_class, tpcb->tp_flags, tpcb->tp_tpdusize, | |
1111 | hdr->tpdu_CCclass); | |
1112 | ENDTRACE | |
1113 | ||
b7fb0758 KS |
1114 | /* if called or calling suffices appeared on the CC, |
1115 | * they'd better jive with what's in the pcb | |
1116 | */ | |
1117 | if( fsufxlen ) { | |
1118 | CHECK( ((tpcb->tp_fsuffixlen != fsufxlen) || | |
1119 | bcmp(fsufxloc, tpcb->tp_fsuffix, fsufxlen)), | |
1120 | E_TP_INV_PVAL,ts_inv_sufx, respond, | |
1121 | (1+fsufxloc - (caddr_t)hdr)) | |
1122 | } | |
1123 | if( lsufxlen ) { | |
1124 | CHECK( ((tpcb->tp_lsuffixlen != lsufxlen) || | |
1125 | bcmp(lsufxloc, tpcb->tp_lsuffix, lsufxlen)), | |
1126 | E_TP_INV_PVAL,ts_inv_sufx, respond, | |
1127 | (1+lsufxloc - (caddr_t)hdr)) | |
1128 | } | |
1129 | ||
b7fb0758 | 1130 | e.ATTR(CC_TPDU).e_sref = sref; |
b7fb0758 KS |
1131 | e.ATTR(CC_TPDU).e_cdt = hdr->tpdu_CCcdt; |
1132 | takes_data = TRUE; | |
1133 | e.ev_number = CC_TPDU; | |
1134 | IncStat(ts_CC_rcvd); | |
1135 | break; | |
1136 | ||
1137 | case DC_TPDU_type: | |
b7fb0758 KS |
1138 | if (sref != tpcb->tp_fref) |
1139 | printf("INPUT: inv sufx DCsref 0x%x, tp_fref 0x%x\n", | |
1140 | sref, tpcb->tp_fref); | |
b7fb0758 | 1141 | |
b7fb0758 | 1142 | CHECK( (sref != tpcb->tp_fref), |
facaece3 | 1143 | E_TP_MISM_REFS, ts_inv_sufx, discard, |
b7fb0758 | 1144 | (1 + (caddr_t)&hdr->tpdu_DCsref - (caddr_t)hdr)) |
facaece3 | 1145 | |
b7fb0758 KS |
1146 | e.ev_number = DC_TPDU; |
1147 | IncStat(ts_DC_rcvd); | |
1148 | break; | |
1149 | ||
1150 | case DR_TPDU_type: | |
1151 | IFTRACE(D_TPINPUT) | |
1152 | tptrace(TPPTmisc, "DR recvd", hdr->tpdu_DRreason, 0, 0, 0); | |
1153 | ENDTRACE | |
facaece3 | 1154 | if (sref != tpcb->tp_fref) { |
b7fb0758 KS |
1155 | printf("INPUT: inv sufx DRsref 0x%x tp_fref 0x%x\n", |
1156 | sref, tpcb->tp_fref); | |
facaece3 | 1157 | } |
b7fb0758 | 1158 | |
facaece3 KS |
1159 | CHECK( (sref != 0 && sref != tpcb->tp_fref && |
1160 | tpcb->tp_state != TP_CRSENT), | |
1161 | (TP_ERROR_SNDC | E_TP_MISM_REFS),ts_inv_sufx, respond, | |
b7fb0758 KS |
1162 | (1 + (caddr_t)&hdr->tpdu_DRsref - (caddr_t)hdr)) |
1163 | ||
1164 | e.ATTR(DR_TPDU).e_reason = hdr->tpdu_DRreason; | |
1165 | e.ATTR(DR_TPDU).e_sref = (u_short)sref; | |
b7fb0758 KS |
1166 | takes_data = TRUE; |
1167 | e.ev_number = DR_TPDU; | |
1168 | IncStat(ts_DR_rcvd); | |
1169 | break; | |
1170 | ||
1171 | case ER_TPDU_type: | |
1172 | IFTRACE(D_TPINPUT) | |
1173 | tptrace(TPPTmisc, "ER recvd", hdr->tpdu_ERreason,0,0,0); | |
1174 | ENDTRACE | |
1175 | e.ev_number = ER_TPDU; | |
1176 | e.ATTR(ER_TPDU).e_reason = hdr->tpdu_ERreason; | |
1177 | IncStat(ts_ER_rcvd); | |
1178 | break; | |
1179 | ||
1180 | case AK_TPDU_type: | |
1181 | ||
1182 | e.ATTR(AK_TPDU).e_subseq = subseq; | |
1183 | e.ATTR(AK_TPDU).e_fcc_present = fcc_present; | |
1184 | ||
1185 | if (tpcb->tp_xtd_format) { | |
1186 | #ifdef BYTE_ORDER | |
1187 | union seq_type seqeotX; | |
1188 | ||
1189 | seqeotX.s_seqeot = ntohl(hdr->tpdu_seqeotX); | |
1190 | e.ATTR(AK_TPDU).e_seq = seqeotX.s_seq; | |
1191 | e.ATTR(AK_TPDU).e_cdt = ntohs(hdr->tpdu_AKcdtX); | |
1192 | #else | |
1193 | e.ATTR(AK_TPDU).e_cdt = hdr->tpdu_AKcdtX; | |
1194 | e.ATTR(AK_TPDU).e_seq = hdr->tpdu_AKseqX; | |
1195 | #endif BYTE_ORDER | |
1196 | } else { | |
1197 | e.ATTR(AK_TPDU).e_cdt = hdr->tpdu_AKcdt; | |
1198 | e.ATTR(AK_TPDU).e_seq = hdr->tpdu_AKseq; | |
1199 | } | |
1200 | IFTRACE(D_TPINPUT) | |
1201 | tptrace(TPPTmisc, "AK recvd seq cdt subseq fcc_pres", | |
1202 | e.ATTR(AK_TPDU).e_seq, e.ATTR(AK_TPDU).e_cdt, | |
1203 | subseq, fcc_present); | |
1204 | ENDTRACE | |
1205 | ||
1206 | e.ev_number = AK_TPDU; | |
1207 | IncStat(ts_AK_rcvd); | |
1208 | IncPStat(tpcb, tps_AK_rcvd); | |
1209 | break; | |
1210 | ||
1211 | case XAK_TPDU_type: | |
1212 | if (tpcb->tp_xtd_format) { | |
1213 | #ifdef BYTE_ORDER | |
1214 | union seq_type seqeotX; | |
1215 | ||
1216 | seqeotX.s_seqeot = ntohl(hdr->tpdu_seqeotX); | |
1217 | e.ATTR(XAK_TPDU).e_seq = seqeotX.s_seq; | |
1218 | #else | |
1219 | e.ATTR(XAK_TPDU).e_seq = hdr->tpdu_XAKseqX; | |
1220 | #endif BYTE_ORDER | |
1221 | } else { | |
1222 | e.ATTR(XAK_TPDU).e_seq = hdr->tpdu_XAKseq; | |
1223 | } | |
1224 | e.ev_number = XAK_TPDU; | |
1225 | IncStat(ts_XAK_rcvd); | |
1226 | IncPStat(tpcb, tps_XAK_rcvd); | |
1227 | break; | |
1228 | ||
1229 | case XPD_TPDU_type: | |
1230 | if (tpcb->tp_xtd_format) { | |
1231 | #ifdef BYTE_ORDER | |
1232 | union seq_type seqeotX; | |
1233 | ||
1234 | seqeotX.s_seqeot = ntohl(hdr->tpdu_seqeotX); | |
1235 | e.ATTR(XPD_TPDU).e_seq = seqeotX.s_seq; | |
1236 | #else | |
1237 | e.ATTR(XPD_TPDU).e_seq = hdr->tpdu_XPDseqX; | |
1238 | #endif BYTE_ORDER | |
1239 | } else { | |
1240 | e.ATTR(XPD_TPDU).e_seq = hdr->tpdu_XPDseq; | |
1241 | } | |
1242 | takes_data = TRUE; | |
1243 | e.ev_number = XPD_TPDU; | |
1244 | IncStat(ts_XPD_rcvd); | |
1245 | IncPStat(tpcb, tps_XPD_rcvd); | |
1246 | break; | |
1247 | ||
1248 | case DT_TPDU_type: | |
1249 | { /* the y option will cause occasional packets to be dropped. | |
1250 | * A little crude but it works. | |
1251 | */ | |
1252 | ||
1253 | IFDEBUG(D_DROP) | |
1254 | if(time.tv_usec & 0x4 && hdr->tpdu_DTseq & 0x1) { | |
1255 | IncStat(ts_ydebug); | |
1256 | goto discard; | |
1257 | } | |
1258 | ENDDEBUG | |
1259 | } | |
1260 | if (tpcb->tp_class == TP_CLASS_0) { | |
01acbfa1 | 1261 | tp0_data: |
b7fb0758 KS |
1262 | e.ATTR(DT_TPDU).e_seq = 0; /* actually don't care */ |
1263 | e.ATTR(DT_TPDU).e_eot = (((struct tp0du *)hdr)->tp0du_eot); | |
1264 | } else if (tpcb->tp_xtd_format) { | |
1265 | #ifdef BYTE_ORDER | |
1266 | union seq_type seqeotX; | |
1267 | ||
1268 | seqeotX.s_seqeot = ntohl(hdr->tpdu_seqeotX); | |
1269 | e.ATTR(DT_TPDU).e_seq = seqeotX.s_seq; | |
1270 | e.ATTR(DT_TPDU).e_eot = seqeotX.s_eot; | |
1271 | #else | |
1272 | e.ATTR(DT_TPDU).e_seq = hdr->tpdu_DTseqX; | |
1273 | e.ATTR(DT_TPDU).e_eot = hdr->tpdu_DTeotX; | |
1274 | #endif BYTE_ORDER | |
1275 | } else { | |
1276 | e.ATTR(DT_TPDU).e_seq = hdr->tpdu_DTseq; | |
1277 | e.ATTR(DT_TPDU).e_eot = hdr->tpdu_DTeot; | |
1278 | } | |
1279 | if(e.ATTR(DT_TPDU).e_eot) | |
1280 | IncStat(ts_eot_input); | |
1281 | takes_data = TRUE; | |
1282 | e.ev_number = DT_TPDU; | |
1283 | IncStat(ts_DT_rcvd); | |
1284 | IncPStat(tpcb, tps_DT_rcvd); | |
1285 | break; | |
1286 | ||
1287 | case GR_TPDU_type: | |
1288 | tp_indicate(T_DISCONNECT, tpcb, ECONNABORTED); | |
1289 | /* drop through */ | |
1290 | default: | |
1291 | /* this should NEVER happen because there is a | |
1292 | * check for dutype well above here | |
1293 | */ | |
1294 | error = E_TP_INV_TPDU; /* causes an ER */ | |
1295 | IFDEBUG(D_TPINPUT) | |
1296 | printf("INVALID dutype 0x%x\n", hdr->tpdu_type); | |
1297 | ENDDEBUG | |
1298 | IncStat(ts_inv_dutype); | |
1299 | goto respond; | |
1300 | } | |
1301 | } | |
b7fb0758 KS |
1302 | /* peel off the tp header; |
1303 | * remember that the du_li doesn't count itself. | |
1304 | * This may leave us w/ an empty mbuf at the front of a chain. | |
1305 | * We can't just throw away the empty mbuf because hdr still points | |
1306 | * into the mbuf's data area and we're still using hdr (the tpdu header) | |
1307 | */ | |
1308 | m->m_len -= ((int)hdr->tpdu_li + 1); | |
a50e2bc0 | 1309 | m->m_data += ((int)hdr->tpdu_li + 1); |
b7fb0758 | 1310 | |
a50e2bc0 KS |
1311 | if (takes_data) { |
1312 | int max = tpdu_info[ hdr->tpdu_type ] [TP_MAX_DATA_INDEX]; | |
1313 | int datalen = tpdu_len - hdr->tpdu_li - 1, mbtype = MT_DATA; | |
c71927bd KS |
1314 | struct { |
1315 | struct tp_disc_reason dr; | |
1316 | struct cmsghdr x_hdr; | |
1317 | } x; | |
1318 | #define c_hdr x.x_hdr | |
1319 | register struct mbuf *n; | |
b7fb0758 | 1320 | |
a50e2bc0 KS |
1321 | CHECK( (max && datalen > max), E_TP_LENGTH_INVAL, |
1322 | ts_inv_length, respond, (max + hdr->tpdu_li + 1) ); | |
b7fb0758 | 1323 | switch( hdr->tpdu_type ) { |
a50e2bc0 | 1324 | |
b7fb0758 | 1325 | case CR_TPDU_type: |
a50e2bc0 KS |
1326 | c_hdr.cmsg_type = TPOPT_CONN_DATA; |
1327 | goto make_control_msg; | |
1328 | ||
b7fb0758 | 1329 | case CC_TPDU_type: |
a50e2bc0 KS |
1330 | c_hdr.cmsg_type = TPOPT_CFRM_DATA; |
1331 | goto make_control_msg; | |
1332 | ||
b7fb0758 | 1333 | case DR_TPDU_type: |
c71927bd KS |
1334 | x.dr.dr_hdr.cmsg_len = sizeof(x) - sizeof(c_hdr); |
1335 | x.dr.dr_hdr.cmsg_type = TPOPT_DISC_REASON; | |
1336 | x.dr.dr_hdr.cmsg_level = SOL_TRANSPORT; | |
1337 | x.dr.dr_reason = hdr->tpdu_DRreason; | |
a50e2bc0 KS |
1338 | c_hdr.cmsg_type = TPOPT_DISC_DATA; |
1339 | make_control_msg: | |
c71927bd KS |
1340 | datalen += sizeof(c_hdr); |
1341 | c_hdr.cmsg_len = datalen; | |
a50e2bc0 KS |
1342 | c_hdr.cmsg_level = SOL_TRANSPORT; |
1343 | mbtype = MT_CONTROL; | |
c2bb180a | 1344 | MGET(n, M_DONTWAIT, MT_DATA); |
c71927bd KS |
1345 | if (n == 0) |
1346 | {m_freem(m); m = 0; datalen = 0; goto invoke; } | |
1347 | if (hdr->tpdu_type == DR_TPDU_type) { | |
1348 | datalen += sizeof(x) - sizeof(c_hdr); | |
1349 | bcopy((caddr_t)&x, mtod(n, caddr_t), n->m_len = sizeof(x)); | |
1350 | } else | |
1351 | bcopy((caddr_t)&c_hdr, mtod(n, caddr_t), | |
1352 | n->m_len = sizeof(c_hdr)); | |
1353 | n->m_next = m; | |
1354 | m = n; | |
a50e2bc0 KS |
1355 | /* FALLTHROUGH */ |
1356 | ||
b7fb0758 | 1357 | case XPD_TPDU_type: |
a50e2bc0 KS |
1358 | if (mbtype != MT_CONTROL) |
1359 | mbtype = MT_OOBDATA; | |
1360 | m->m_flags |= M_EOR; | |
1361 | /* FALLTHROUGH */ | |
b7fb0758 | 1362 | |
a50e2bc0 KS |
1363 | case DT_TPDU_type: |
1364 | for (n = m; n; n = n->m_next) { | |
1365 | MCHTYPE(n, mbtype); | |
1366 | } | |
c2bb180a | 1367 | invoke: |
a50e2bc0 | 1368 | e.ATTR(DT_TPDU).e_datalen = datalen; |
b7fb0758 KS |
1369 | e.ATTR(DT_TPDU).e_data = m; |
1370 | break; | |
1371 | ||
1372 | default: | |
1373 | printf( | |
1374 | "ERROR in tp_input! hdr->tpdu_type 0x%x takes_data 0x%x m 0x%x\n", | |
1375 | hdr->tpdu_type, takes_data, m); | |
1376 | break; | |
1377 | } | |
1378 | /* prevent m_freem() after tp_driver() from throwing it all away */ | |
1379 | m = MNULL; | |
1380 | } | |
1381 | ||
1382 | IncStat(ts_tpdu_rcvd); | |
1383 | ||
1384 | IFDEBUG(D_TPINPUT) | |
1385 | printf( "tp_input: before driver, state 0x%x event 0x%x m 0x%x", | |
1386 | tpcb->tp_state, e.ev_number, m ); | |
1387 | printf(" e.e_data 0x%x\n", e.ATTR(DT_TPDU).e_data); | |
1388 | printf("takes_data 0x%x m_len 0x%x, tpdu_len 0x%x\n", | |
1389 | takes_data, (m==MNULL)?0:m->m_len, tpdu_len); | |
1390 | ENDDEBUG | |
1391 | ||
b7fb0758 KS |
1392 | error = tp_driver(tpcb, &e); |
1393 | ||
1394 | ASSERT(tpcb != (struct tp_pcb *)0); | |
1395 | ASSERT(tpcb->tp_sock != (struct socket *)0); | |
1396 | if( tpcb->tp_sock->so_error == 0 ) | |
1397 | tpcb->tp_sock->so_error = error; | |
1398 | ||
1399 | /* Kludge to keep the state tables under control (adding | |
1400 | * data on connect & disconnect & freeing the mbuf containing | |
1401 | * the data would have exploded the tables and made a big mess ). | |
1402 | */ | |
1403 | switch(e.ev_number) { | |
1404 | case CC_TPDU: | |
1405 | case DR_TPDU: | |
1406 | case CR_TPDU: | |
1407 | m = e.ATTR(CC_TPDU).e_data; /* same field for all three dutypes */ | |
1408 | IFDEBUG(D_TPINPUT) | |
1409 | printf("after driver, restoring m to 0x%x, takes_data 0x%x\n", | |
1410 | m, takes_data); | |
1411 | ENDDEBUG | |
1412 | break; | |
1413 | default: | |
1414 | break; | |
1415 | } | |
1416 | /* Concatenated sequences are terminated by any tpdu that | |
1417 | * carries data: CR, CC, DT, XPD, DR. | |
1418 | * All other tpdu types may be concatenated: AK, XAK, DC, ER. | |
1419 | */ | |
1420 | ||
1421 | separate: | |
1422 | if ( takes_data == 0 ) { | |
1423 | ASSERT( m != MNULL ); | |
1424 | /* | |
1425 | * we already peeled off the prev. tp header so | |
1426 | * we can just pull up some more and repeat | |
1427 | */ | |
1428 | ||
a50e2bc0 | 1429 | if( m = tp_inputprep(m) ) { |
b7fb0758 KS |
1430 | IFDEBUG(D_TPINPUT) |
1431 | hdr = mtod(m, struct tpdu *); | |
1432 | printf("tp_input @ separate: hdr 0x%x size %d m 0x%x\n", | |
1433 | hdr, (int) hdr->tpdu_li + 1, m); | |
1434 | dump_mbuf(m, "tp_input after driver, at separate"); | |
1435 | ENDDEBUG | |
1436 | ||
b7fb0758 KS |
1437 | IncStat(ts_concat_rcvd); |
1438 | goto again; | |
1439 | } | |
1440 | } | |
1441 | if ( m != MNULL ) { | |
1442 | IFDEBUG(D_TPINPUT) | |
1443 | printf("tp_input : m_freem(0x%x)\n", m); | |
1444 | ENDDEBUG | |
1445 | m_freem(m); | |
1446 | IFDEBUG(D_TPINPUT) | |
1447 | printf("tp_input : after m_freem 0x%x\n", m); | |
1448 | ENDDEBUG | |
1449 | } | |
1450 | return (ProtoHook) tpcb; | |
1451 | ||
1452 | discard: | |
1453 | /* class 4: drop the tpdu */ | |
1454 | /* class 2,0: Should drop the net connection, if you can figure out | |
1455 | * to which connection it applies | |
1456 | */ | |
1457 | IFDEBUG(D_TPINPUT) | |
1458 | printf("tp_input DISCARD\n"); | |
1459 | ENDDEBUG | |
1460 | IFTRACE(D_TPINPUT) | |
1461 | tptrace(TPPTmisc, "tp_input DISCARD m", m,0,0,0); | |
1462 | ENDTRACE | |
1463 | m_freem(m); | |
1464 | IncStat(ts_recv_drop); | |
1465 | return (ProtoHook)0; | |
1466 | ||
facaece3 KS |
1467 | nonx_dref: |
1468 | switch (dutype) { | |
1469 | default: | |
1470 | goto discard; | |
1471 | case CC_TPDU_type: | |
1472 | /* error = E_TP_MISM_REFS; */ | |
1473 | break; | |
1474 | case DR_TPDU_type: | |
1475 | error |= TP_ERROR_SNDC; | |
1476 | } | |
b7fb0758 | 1477 | respond: |
c2bb180a | 1478 | IFDEBUG(D_TPINPUT) |
facaece3 | 1479 | printf("RESPOND: error 0x%x, errlen 0x%x\n", error, errlen); |
b7fb0758 KS |
1480 | ENDDEBUG |
1481 | IFTRACE(D_TPINPUT) | |
facaece3 | 1482 | tptrace(TPPTmisc, "tp_input RESPOND m error sref", m, error, sref, 0); |
b7fb0758 | 1483 | ENDTRACE |
facaece3 | 1484 | if (sref == 0) |
b7fb0758 | 1485 | goto discard; |
a50e2bc0 | 1486 | (void) tp_error_emit(error, (u_long)sref, (struct sockaddr_iso *)faddr, |
facaece3 | 1487 | (struct sockaddr_iso *)laddr, m, errlen, tpcb, |
01acbfa1 | 1488 | cons_channel, dgout_routine); |
b7fb0758 KS |
1489 | IFDEBUG(D_ERROR_EMIT) |
1490 | printf("tp_input after error_emit\n"); | |
1491 | ENDDEBUG | |
1492 | ||
1493 | #ifdef lint | |
1494 | printf("",sref,opt); | |
1495 | #endif lint | |
1496 | IncStat(ts_recv_drop); | |
1497 | return (ProtoHook)0; | |
1498 | } | |
1499 | ||
1500 | ||
1501 | /* | |
1502 | * NAME: tp_headersize() | |
1503 | * | |
1504 | * CALLED FROM: | |
1505 | * tp_emit() and tp_sbsend() | |
1506 | * TP needs to know the header size so it can figure out how | |
1507 | * much data to put in each tpdu. | |
1508 | * | |
1509 | * FUNCTION, ARGUMENTS, and RETURN VALUE: | |
1510 | * For a given connection, represented by (tpcb), and | |
1511 | * tpdu type (dutype), return the size of a tp header. | |
1512 | * | |
1513 | * RETURNS: the expected size of the heade in bytesr | |
1514 | * | |
1515 | * SIDE EFFECTS: | |
1516 | * | |
1517 | * NOTES: It would be nice if it got the network header size as well. | |
1518 | */ | |
1519 | int | |
1520 | tp_headersize(dutype, tpcb) | |
1521 | int dutype; | |
1522 | struct tp_pcb *tpcb; | |
1523 | { | |
1524 | register int size = 0; | |
1525 | ||
1526 | IFTRACE(D_CONN) | |
1527 | tptrace(TPPTmisc, "tp_headersize dutype class xtd_format", | |
1528 | dutype, tpcb->tp_class, tpcb->tp_xtd_format, 0); | |
1529 | ENDTRACE | |
1530 | if( !( (tpcb->tp_class == TP_CLASS_0) || | |
1531 | (tpcb->tp_class == TP_CLASS_4) || | |
1532 | (dutype == DR_TPDU_type) || | |
1533 | (dutype == CR_TPDU_type) )) { | |
1534 | printf("tp_headersize:dutype 0x%x, class 0x%x", | |
1535 | dutype, tpcb->tp_class); | |
1536 | /* TODO: identify this and GET RID OF IT */ | |
1537 | } | |
1538 | ASSERT( (tpcb->tp_class == TP_CLASS_0) || | |
1539 | (tpcb->tp_class == TP_CLASS_4) || | |
1540 | (dutype == DR_TPDU_type) || | |
1541 | (dutype == CR_TPDU_type) ); | |
1542 | ||
1543 | if( tpcb->tp_class == TP_CLASS_0 ) { | |
1544 | size = tpdu_info[ dutype ] [TP_LEN_CLASS_0_INDEX]; | |
1545 | } else { | |
1546 | size = tpdu_info[ dutype ] [tpcb->tp_xtd_format]; | |
1547 | } | |
1548 | return size; | |
1549 | /* caller must get network level header size separately */ | |
1550 | } |