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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 | * | |
4d8170e5 | 7 | * @(#)tp_input.c 7.32 (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 | ||
5548a02f KB |
63 | #include <sys/param.h> |
64 | #include <sys/systm.h> | |
65 | #include <sys/mbuf.h> | |
66 | #include <sys/socket.h> | |
67 | #include <sys/socketvar.h> | |
68 | #include <sys/domain.h> | |
69 | #include <sys/protosw.h> | |
70 | #include <sys/errno.h> | |
71 | #include <sys/time.h> | |
72 | #include <sys/kernel.h> | |
194a383a | 73 | |
5548a02f KB |
74 | #include <netiso/iso.h> |
75 | #include <netiso/iso_errno.h> | |
76 | #include <netiso/iso_pcb.h> | |
77 | #include <netiso/tp_param.h> | |
78 | #include <netiso/tp_timer.h> | |
79 | #include <netiso/tp_stat.h> | |
80 | #include <netiso/tp_pcb.h> | |
81 | #include <netiso/argo_debug.h> | |
82 | #include <netiso/tp_trace.h> | |
83 | #include <netiso/tp_tpdu.h> | |
84 | ||
85 | #include <net/if.h> | |
194a383a KS |
86 | #ifdef TRUE |
87 | #undef FALSE | |
88 | #undef TRUE | |
89 | #endif | |
5548a02f KB |
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 ) { | |
de9e4e14 KS |
114 | /* The "m_free" logic |
115 | * if( (m = m_free(m)) == MNULL ) | |
116 | * return (struct mbuf *)0; | |
117 | * would cause a system crash if ever executed. | |
118 | * This logic will be executed if the first mbuf | |
119 | * in the chain only contains a CLNP header. The m_free routine | |
120 | * will release the mbuf containing the CLNP header from the | |
121 | * chain and the new head of the chain will not have the | |
122 | * M_PKTHDR bit set. This routine, tp_inputprep, will | |
123 | * eventually call the "sbappendaddr" routine. "sbappendaddr" | |
124 | * calls "panic" if M_PKTHDR is not set. m_pullup is a cheap | |
125 | * way of keeping the head of the chain from being freed. | |
126 | */ | |
70338c83 | 127 | if((m = m_pullup(m, 1)) == MNULL) |
de9e4e14 | 128 | return (MNULL); |
b7fb0758 | 129 | } |
a50e2bc0 KS |
130 | if(((int)m->m_data) & 0x3) { |
131 | /* If we are not 4-byte aligned, we have to be | |
132 | * above the beginning of the mbuf, and it is ok just | |
133 | * to slide it back. | |
134 | */ | |
135 | caddr_t ocp = m->m_data; | |
b7fb0758 | 136 | |
a50e2bc0 | 137 | m->m_data = (caddr_t)(((int)m->m_data) & ~0x3); |
a7d903c5 | 138 | bcopy(ocp, m->m_data, (unsigned)m->m_len); |
b7fb0758 KS |
139 | } |
140 | CHANGE_MTYPE(m, TPMT_DATA); | |
141 | ||
a50e2bc0 KS |
142 | /* we KNOW that there is at least 1 byte in this mbuf |
143 | and that it is hdr->tpdu_li XXXXXXX! */ | |
b7fb0758 | 144 | |
a50e2bc0 | 145 | hdrlen = 1 + *mtod( m, u_char *); |
b7fb0758 KS |
146 | |
147 | /* | |
148 | * now pull up the whole tp header | |
149 | */ | |
a50e2bc0 KS |
150 | if ( m->m_len < hdrlen) { |
151 | if ((m = m_pullup(m, hdrlen)) == MNULL ) { | |
b7fb0758 KS |
152 | IncStat(ts_recv_drop); |
153 | return (struct mbuf *)0; | |
154 | } | |
155 | } | |
156 | IFDEBUG(D_INPUT) | |
157 | printf( | |
158 | " at end: m 0x%x hdr->tpdu_li 0x%x m_len 0x%x\n",m, | |
a50e2bc0 | 159 | hdrlen, m->m_len); |
b7fb0758 KS |
160 | ENDDEBUG |
161 | return m; | |
162 | } | |
163 | ||
164 | /* begin groan | |
165 | * -- this array and the following macros allow you to step through the | |
166 | * parameters of the variable part of a header | |
167 | * note that if for any reason the values of the **_TPDU macros (in tp_events.h) | |
168 | * should change, this array has to be rearranged | |
169 | */ | |
170 | ||
171 | #define TP_LEN_CLASS_0_INDEX 2 | |
172 | #define TP_MAX_DATA_INDEX 3 | |
173 | ||
174 | static u_char tpdu_info[][4] = | |
175 | { | |
176 | /* length max data len */ | |
177 | /* reg fmt xtd fmt class 0 */ | |
178 | /* UNUSED 0x0 */ 0x0 , 0x0, 0x0, 0x0, | |
179 | /* XPD_TPDU_type 0x1 */ 0x5, 0x8, 0x0, TP_MAX_XPD_DATA, | |
180 | /* XAK_TPDU_type 0x2 */ 0x5 , 0x8, 0x0, 0x0, | |
181 | /* GR_TPDU_type 0x3 */ 0x0 , 0x0, 0x0, 0x0, | |
182 | /* UNUSED 0x4 */ 0x0 , 0x0, 0x0, 0x0, | |
183 | /* UNUSED 0x5 */ 0x0 , 0x0, 0x0, 0x0, | |
184 | /* AK_TPDU_type 0x6 */ 0x5, 0xa, 0x0, 0x0, | |
185 | /* ER_TPDU_type 0x7 */ 0x5, 0x5, 0x0, 0x0, | |
186 | /* DR_TPDU_type 0x8 */ 0x7, 0x7, 0x7, TP_MAX_DR_DATA, | |
187 | /* UNUSED 0x9 */ 0x0 , 0x0, 0x0, 0x0, | |
188 | /* UNUSED 0xa */ 0x0 , 0x0, 0x0, 0x0, | |
189 | /* UNUSED 0xb */ 0x0 , 0x0, 0x0, 0x0, | |
190 | /* DC_TPDU_type 0xc */ 0x6, 0x6, 0x0, 0x0, | |
191 | /* CC_TPDU_type 0xd */ 0x7, 0x7, 0x7, TP_MAX_CC_DATA, | |
192 | /* CR_TPDU_type 0xe */ 0x7, 0x7, 0x7, TP_MAX_CR_DATA, | |
193 | /* DT_TPDU_type 0xf */ 0x5, 0x8, 0x3, 0x0, | |
194 | }; | |
195 | ||
facaece3 | 196 | #define CHECK(Phrase, Erval, Stat, Whattodo, Loc)\ |
de9e4e14 | 197 | if (Phrase) {error = (Erval); errlen = (int)(Loc); IncStat(Stat);\ |
facaece3 KS |
198 | goto Whattodo; } |
199 | ||
b7fb0758 KS |
200 | /* |
201 | * WHENEVER YOU USE THE FOLLOWING MACRO, | |
202 | * BE SURE THE TPDUTYPE IS A LEGIT VALUE FIRST! | |
203 | */ | |
204 | ||
facaece3 KS |
205 | #define WHILE_OPTIONS(P, hdr, format)\ |
206 | { register caddr_t P = tpdu_info[(hdr)->tpdu_type][(format)] + (caddr_t)hdr;\ | |
207 | caddr_t PLIM = 1 + hdr->tpdu_li + (caddr_t)hdr;\ | |
208 | for (;; P += 2 + ((struct tp_vbp *)P)->tpv_len) {\ | |
209 | CHECK((P > PLIM), E_TP_LENGTH_INVAL, ts_inv_length,\ | |
210 | respond, P - (caddr_t)hdr);\ | |
211 | if (P == PLIM) break; | |
b7fb0758 | 212 | |
facaece3 | 213 | #define END_WHILE_OPTIONS(P) } } |
b7fb0758 KS |
214 | |
215 | /* end groan */ | |
216 | ||
217 | /* | |
218 | * NAME: tp_newsocket() | |
219 | * | |
220 | * CALLED FROM: | |
221 | * tp_input() on incoming CR, when a socket w/ the called suffix | |
222 | * is awaiting a connection request | |
223 | * | |
224 | * FUNCTION and ARGUMENTS: | |
225 | * Create a new socket structure, attach to it a new transport pcb, | |
226 | * using a copy of the net level pcb for the parent socket. | |
227 | * (so) is the parent socket. | |
228 | * (fname) is the foreign address (all that's used is the nsap portion) | |
229 | * | |
230 | * RETURN VALUE: | |
231 | * a new socket structure, being this end of the newly formed connection. | |
232 | * | |
233 | * SIDE EFFECTS: | |
234 | * Sets a few things in the tpcb and net level pcb | |
235 | * | |
236 | * NOTES: | |
237 | */ | |
238 | static struct socket * | |
239 | tp_newsocket(so, fname, cons_channel, class_to_use, netservice) | |
240 | struct socket *so; | |
241 | struct sockaddr *fname; | |
01acbfa1 | 242 | caddr_t cons_channel; |
b7fb0758 KS |
243 | u_char class_to_use; |
244 | u_int netservice; | |
245 | { | |
246 | register struct tp_pcb *tpcb = sototpcb(so); /* old tpcb, needed below */ | |
194a383a | 247 | register struct tp_pcb *newtpcb; |
b7fb0758 KS |
248 | |
249 | /* | |
250 | * sonewconn() gets a new socket structure, | |
251 | * a new lower layer pcb and a new tpcb, | |
252 | * but the pcbs are unnamed (not bound) | |
253 | */ | |
254 | IFTRACE(D_NEWSOCK) | |
44f52ea5 | 255 | tptraceTPCB(TPPTmisc, "newsock: listg_so, _tpcb, so_head", |
7b25382f | 256 | so, tpcb, so->so_head, 0); |
b7fb0758 KS |
257 | ENDTRACE |
258 | ||
bb2bb663 | 259 | if ((so = sonewconn(so, SS_ISCONFIRMING)) == (struct socket *)0) |
b7fb0758 KS |
260 | return so; |
261 | IFTRACE(D_NEWSOCK) | |
44f52ea5 KS |
262 | tptraceTPCB(TPPTmisc, "newsock: after newconn so, so_head", |
263 | so, so->so_head, 0, 0); | |
b7fb0758 KS |
264 | ENDTRACE |
265 | ||
b7fb0758 | 266 | IFDEBUG(D_NEWSOCK) |
a50e2bc0 KS |
267 | printf("tp_newsocket(channel 0x%x) after sonewconn so 0x%x \n", |
268 | cons_channel, so); | |
269 | dump_addr(fname); | |
b7fb0758 KS |
270 | { |
271 | struct socket *t, *head ; | |
272 | ||
273 | head = so->so_head; | |
274 | t = so; | |
275 | printf("so 0x%x so_head 0x%x so_q0 0x%x, q0len %d\n", | |
276 | t, t->so_head, t->so_q0, t->so_q0len); | |
277 | while( (t=t->so_q0) && t!= so && t!= head) | |
278 | printf("so 0x%x so_head 0x%x so_q0 0x%x, q0len %d\n", | |
279 | t, t->so_head, t->so_q0, t->so_q0len); | |
280 | } | |
281 | ENDDEBUG | |
282 | ||
283 | /* | |
284 | * before we clobber the old tpcb ptr, get these items from the parent pcb | |
285 | */ | |
286 | newtpcb = sototpcb(so); | |
287 | newtpcb->_tp_param = tpcb->_tp_param; | |
288 | newtpcb->tp_flags = tpcb->tp_flags; | |
289 | newtpcb->tp_lcredit = tpcb->tp_lcredit; | |
290 | newtpcb->tp_l_tpdusize = tpcb->tp_l_tpdusize; | |
291 | newtpcb->tp_lsuffixlen = tpcb->tp_lsuffixlen; | |
292 | bcopy( tpcb->tp_lsuffix, newtpcb->tp_lsuffix, newtpcb->tp_lsuffixlen); | |
b7fb0758 | 293 | |
a50e2bc0 | 294 | if( /* old */ tpcb->tp_ucddata) { |
b7fb0758 | 295 | /* |
a50e2bc0 | 296 | * These data are the connect- , confirm- or disconnect- data. |
b7fb0758 KS |
297 | */ |
298 | struct mbuf *conndata; | |
299 | ||
a50e2bc0 | 300 | conndata = m_copy(tpcb->tp_ucddata, 0, (int)M_COPYALL); |
b7fb0758 KS |
301 | IFDEBUG(D_CONN) |
302 | dump_mbuf(conndata, "conndata after mcopy"); | |
b7fb0758 | 303 | ENDDEBUG |
a50e2bc0 | 304 | newtpcb->tp_ucddata = conndata; |
b7fb0758 KS |
305 | } |
306 | ||
307 | tpcb = newtpcb; | |
308 | tpcb->tp_state = TP_LISTENING; | |
309 | tpcb->tp_class = class_to_use; | |
310 | tpcb->tp_netservice = netservice; | |
311 | ||
312 | ||
313 | ASSERT( fname != 0 ) ; /* just checking */ | |
314 | if ( fname ) { | |
315 | /* | |
316 | * tp_route_to takes its address argument in the form of an mbuf. | |
317 | */ | |
318 | struct mbuf *m; | |
319 | int err; | |
320 | ||
321 | MGET(m, M_DONTWAIT, MT_SONAME); /* mbuf type used is confusing */ | |
322 | if (m) { | |
323 | /* | |
324 | * this seems a bit grotesque, but tp_route_to expects | |
325 | * an mbuf * instead of simply a sockaddr; it calls the ll | |
326 | * pcb_connect, which expects the name/addr in an mbuf as well. | |
327 | * sigh. | |
328 | */ | |
a50e2bc0 KS |
329 | bcopy((caddr_t)fname, mtod(m, caddr_t), fname->sa_len); |
330 | m->m_len = fname->sa_len; | |
b7fb0758 KS |
331 | |
332 | /* grot : have to say the kernel can override params in | |
333 | * the passive open case | |
334 | */ | |
335 | tpcb->tp_dont_change_params = 0; | |
336 | err = tp_route_to( m, tpcb, cons_channel); | |
337 | m_free(m); | |
338 | ||
339 | if (!err) | |
340 | goto ok; | |
341 | } | |
342 | IFDEBUG(D_CONN) | |
343 | printf("tp_route_to FAILED! detaching tpcb 0x%x, so 0x%x\n", | |
344 | tpcb, so); | |
345 | ENDDEBUG | |
346 | (void) tp_detach(tpcb); | |
347 | return 0; | |
348 | } | |
349 | ok: | |
350 | IFDEBUG(D_TPINPUT) | |
351 | printf("tp_newsocket returning so 0x%x, sototpcb(so) 0x%x\n", | |
352 | so, sototpcb(so)); | |
353 | ENDDEBUG | |
354 | return so; | |
355 | } | |
356 | ||
194a383a | 357 | #ifndef TPCONS |
b7fb0758 KS |
358 | tpcons_output() |
359 | { | |
360 | return(0); | |
361 | } | |
4d8170e5 | 362 | #endif /* !CONS */ |
b7fb0758 KS |
363 | |
364 | /* | |
365 | * NAME: tp_input() | |
366 | * | |
367 | * CALLED FROM: | |
368 | * net layer input routine | |
369 | * | |
370 | * FUNCTION and ARGUMENTS: | |
371 | * Process an incoming TPDU (m), finding the associated tpcb if there | |
372 | * is one. Create the appropriate type of event and call the driver. | |
373 | * (faddr) and (laddr) are the foreign and local addresses. | |
374 | * | |
375 | * When tp_input() is called we KNOW that the ENTIRE TP HEADER | |
376 | * has been m_pullup-ed. | |
377 | * | |
378 | * RETURN VALUE: Nada | |
379 | * | |
380 | * SIDE EFFECTS: | |
381 | * When using COSNS it may affect the state of the net-level pcb | |
382 | * | |
383 | * NOTE: | |
384 | * The initial value of acktime is 2 so that we will never | |
385 | * have a 0 value for tp_peer_acktime. It gets used in the | |
386 | * computation of the retransmission timer value, and so it | |
387 | * mustn't be zero. | |
388 | * 2 seems like a reasonable minimum. | |
389 | */ | |
390 | ProtoHook | |
20650f15 | 391 | tp_input(m, faddr, laddr, cons_channel, dgout_routine, ce_bit) |
b7fb0758 KS |
392 | register struct mbuf *m; |
393 | struct sockaddr *faddr, *laddr; /* NSAP addresses */ | |
01acbfa1 | 394 | caddr_t cons_channel; |
b7fb0758 | 395 | int (*dgout_routine)(); |
20650f15 | 396 | int ce_bit; |
b7fb0758 KS |
397 | |
398 | { | |
de9e4e14 | 399 | register struct tp_pcb *tpcb; |
d9a01c3e | 400 | register struct tpdu *hdr; |
b7fb0758 KS |
401 | struct socket *so; |
402 | struct tp_event e; | |
de9e4e14 | 403 | int error; |
b7fb0758 | 404 | unsigned dutype; |
de9e4e14 KS |
405 | u_short dref, sref, acktime, subseq; |
406 | u_char preferred_class, class_to_use, pdusize; | |
407 | u_char opt, dusize, addlopt, version; | |
b7fb0758 | 408 | #ifdef TP_PERF_MEAS |
44f52ea5 | 409 | u_char perf_meas; |
4d8170e5 | 410 | #endif /* TP_PERF_MEAS */ |
de9e4e14 KS |
411 | u_char fsufxlen, lsufxlen; |
412 | caddr_t fsufxloc, lsufxloc; | |
413 | int tpdu_len; | |
414 | u_int takes_data; | |
415 | u_int fcc_present; | |
416 | int errlen; | |
b7fb0758 KS |
417 | struct tp_conn_param tpp; |
418 | int tpcons_output(); | |
419 | ||
44f52ea5 | 420 | again: |
d9a01c3e | 421 | hdr = mtod(m, struct tpdu *); |
de9e4e14 | 422 | tpcb = 0; |
70338c83 | 423 | error = errlen = tpdu_len = 0; |
de9e4e14 KS |
424 | takes_data = fcc_present = FALSE; |
425 | acktime = 2; sref = subseq = 0; | |
70338c83 | 426 | fsufxloc = lsufxloc = NULL; |
de9e4e14 KS |
427 | fsufxlen = lsufxlen = |
428 | preferred_class = class_to_use = pdusize = addlopt = 0; | |
429 | dusize = TP_DFL_TPDUSIZE; | |
b7fb0758 | 430 | #ifdef TP_PERF_MEAS |
44f52ea5 | 431 | GET_CUR_TIME( &e.e_time ); perf_meas = 0; |
4d8170e5 | 432 | #endif /* TP_PERF_MEAS */ |
b7fb0758 KS |
433 | |
434 | IFDEBUG(D_TPINPUT) | |
435 | printf("tp_input(0x%x, ... 0x%x)\n", m, cons_channel); | |
436 | ENDDEBUG | |
437 | ||
b7fb0758 | 438 | |
b7fb0758 KS |
439 | /* |
440 | * get the actual tpdu length - necessary for monitoring | |
441 | * and for checksumming | |
442 | * | |
443 | * Also, maybe measure the mbuf chain lengths and sizes. | |
444 | */ | |
445 | ||
446 | { register struct mbuf *n=m; | |
447 | # ifdef ARGO_DEBUG | |
448 | int chain_length = 0; | |
449 | # endif ARGO_DEBUG | |
450 | ||
451 | for(;;) { | |
452 | tpdu_len += n->m_len; | |
453 | IFDEBUG(D_MBUF_MEAS) | |
a50e2bc0 | 454 | if( n->m_flags & M_EXT) { |
b7fb0758 KS |
455 | IncStat(ts_mb_cluster); |
456 | } else { | |
457 | IncStat(ts_mb_small); | |
458 | } | |
459 | chain_length ++; | |
460 | ENDDEBUG | |
461 | if (n->m_next == MNULL ) { | |
462 | break; | |
463 | } | |
464 | n = n->m_next; | |
465 | } | |
466 | IFDEBUG(D_MBUF_MEAS) | |
467 | if(chain_length > 16) | |
468 | chain_length = 0; /* zero used for anything > 16 */ | |
469 | tp_stat.ts_mb_len_distr[chain_length] ++; | |
470 | ENDDEBUG | |
471 | } | |
472 | IFTRACE(D_TPINPUT) | |
473 | tptraceTPCB(TPPTtpduin, hdr->tpdu_type, hdr, hdr->tpdu_li+1, tpdu_len, | |
474 | 0); | |
475 | ENDTRACE | |
476 | ||
477 | dref = ntohs((short)hdr->tpdu_dref); | |
478 | sref = ntohs((short)hdr->tpdu_sref); | |
479 | dutype = (int)hdr->tpdu_type; | |
480 | ||
481 | IFDEBUG(D_TPINPUT) | |
482 | printf("input: dutype 0x%x cons_channel 0x%x dref 0x%x\n", dutype, | |
483 | cons_channel, dref); | |
484 | printf("input: dref 0x%x sref 0x%x\n", dref, sref); | |
485 | ENDDEBUG | |
486 | IFTRACE(D_TPINPUT) | |
487 | tptrace(TPPTmisc, "channel dutype dref ", | |
488 | cons_channel, dutype, dref, 0); | |
489 | ENDTRACE | |
490 | ||
491 | ||
492 | #ifdef ARGO_DEBUG | |
493 | if( (dutype < TP_MIN_TPDUTYPE) || (dutype > TP_MAX_TPDUTYPE)) { | |
494 | printf("BAD dutype! 0x%x, channel 0x%x dref 0x%x\n", | |
495 | dutype, cons_channel, dref); | |
496 | dump_buf (m, sizeof( struct mbuf )); | |
497 | ||
498 | IncStat(ts_inv_dutype); | |
499 | goto discard; | |
500 | } | |
4d8170e5 | 501 | #endif /* ARGO_DEBUG */ |
b7fb0758 KS |
502 | |
503 | CHECK( (dutype < TP_MIN_TPDUTYPE || dutype > TP_MAX_TPDUTYPE), | |
504 | E_TP_INV_TPDU, ts_inv_dutype, respond, | |
505 | 2 ); | |
506 | /* unfortunately we can't take the address of the tpdu_type field, | |
507 | * since it's a bit field - so we just use the constant offset 2 | |
508 | */ | |
509 | ||
510 | /* Now this isn't very neat but since you locate a pcb one way | |
511 | * at the beginning of connection establishment, and by | |
512 | * the dref for each tpdu after that, we have to treat CRs differently | |
513 | */ | |
514 | if ( dutype == CR_TPDU_type ) { | |
515 | u_char alt_classes = 0; | |
516 | ||
a50e2bc0 | 517 | preferred_class = 1 << hdr->tpdu_CRclass; |
b7fb0758 KS |
518 | opt = hdr->tpdu_CRoptions; |
519 | ||
520 | WHILE_OPTIONS(P, hdr, 1 ) /* { */ | |
521 | ||
522 | switch( vbptr(P)->tpv_code ) { | |
523 | ||
524 | case TPP_tpdu_size: | |
525 | vb_getval(P, u_char, dusize); | |
526 | IFDEBUG(D_TPINPUT) | |
527 | printf("CR dusize 0x%x\n", dusize); | |
528 | ENDDEBUG | |
facaece3 KS |
529 | /* COS tests: NBS IA (Dec. 1987) Sec. 4.5.2.1 */ |
530 | if (dusize < TP_MIN_TPDUSIZE || dusize > TP_MAX_TPDUSIZE) | |
531 | dusize = TP_DFL_TPDUSIZE; | |
b7fb0758 | 532 | break; |
d119092b KS |
533 | case TPP_ptpdu_size: |
534 | switch (vbptr(P)->tpv_len) { | |
535 | case 1: pdusize = vbval(P, u_char); break; | |
536 | case 2: pdusize = ntohs(vbval(P, u_short)); break; | |
537 | default: ; | |
538 | IFDEBUG(D_TPINPUT) | |
539 | printf("malformed prefered TPDU option\n"); | |
540 | ENDDEBUG | |
541 | } | |
542 | break; | |
b7fb0758 KS |
543 | case TPP_addl_opt: |
544 | vb_getval(P, u_char, addlopt); | |
545 | break; | |
546 | case TPP_calling_sufx: | |
547 | /* could use vb_getval, but we want to save the loc & len | |
548 | * for later use | |
549 | */ | |
550 | fsufxloc = (caddr_t) &vbptr(P)->tpv_val; | |
551 | fsufxlen = vbptr(P)->tpv_len; | |
552 | IFDEBUG(D_TPINPUT) | |
553 | printf("CR fsufx:"); | |
554 | { register int j; | |
555 | for(j=0; j<fsufxlen; j++ ) { | |
556 | printf(" 0x%x. ", *((caddr_t)(fsufxloc+j)) ); | |
557 | } | |
558 | printf("\n"); | |
559 | } | |
560 | ENDDEBUG | |
561 | break; | |
562 | case TPP_called_sufx: | |
563 | /* could use vb_getval, but we want to save the loc & len | |
564 | * for later use | |
565 | */ | |
566 | lsufxloc = (caddr_t) &vbptr(P)->tpv_val; | |
567 | lsufxlen = vbptr(P)->tpv_len; | |
568 | IFDEBUG(D_TPINPUT) | |
569 | printf("CR lsufx:"); | |
570 | { register int j; | |
571 | for(j=0; j<lsufxlen; j++ ) { | |
a50e2bc0 | 572 | printf(" 0x%x. ", *((u_char *)(lsufxloc+j)) ); |
b7fb0758 KS |
573 | } |
574 | printf("\n"); | |
575 | } | |
576 | ENDDEBUG | |
577 | break; | |
578 | ||
579 | #ifdef TP_PERF_MEAS | |
580 | case TPP_perf_meas: | |
581 | vb_getval(P, u_char, perf_meas); | |
582 | break; | |
4d8170e5 | 583 | #endif /* TP_PERF_MEAS */ |
b7fb0758 KS |
584 | |
585 | case TPP_vers: | |
586 | /* not in class 0; 1 octet; in CR_TPDU only */ | |
facaece3 | 587 | /* COS tests says if version wrong, use default version!?XXX */ |
b7fb0758 | 588 | CHECK( (vbval(P, u_char) != TP_VERSION ), |
10c42688 | 589 | E_TP_INV_PVAL, ts_inv_pval, setversion, |
facaece3 | 590 | (1 + (caddr_t)&vbptr(P)->tpv_val - (caddr_t)hdr) ); |
10c42688 KS |
591 | setversion: |
592 | version = vbval(P, u_char); | |
b7fb0758 KS |
593 | break; |
594 | case TPP_acktime: | |
595 | vb_getval(P, u_short, acktime); | |
596 | acktime = ntohs(acktime); | |
597 | acktime = acktime/500; /* convert to slowtimo ticks */ | |
598 | if((short)acktime <=0 ) | |
599 | acktime = 2; /* don't allow a bad peer to screw us up */ | |
600 | IFDEBUG(D_TPINPUT) | |
601 | printf("CR acktime 0x%x\n", acktime); | |
602 | ENDDEBUG | |
603 | break; | |
604 | ||
605 | case TPP_alt_class: | |
606 | { | |
607 | u_char *aclass = 0; | |
608 | register int i; | |
facaece3 KS |
609 | static u_char bad_alt_classes[5] = |
610 | { ~0, ~3, ~5, ~0xf, ~0x1f}; | |
b7fb0758 | 611 | |
facaece3 KS |
612 | aclass = |
613 | (u_char *) &(((struct tp_vbp *)P)->tpv_val); | |
b7fb0758 | 614 | for (i = ((struct tp_vbp *)P)->tpv_len; i>0; i--) { |
facaece3 | 615 | alt_classes |= (1<<((*aclass++)>>4)); |
b7fb0758 | 616 | } |
facaece3 KS |
617 | CHECK( (bad_alt_classes[hdr->tpdu_CRclass] & alt_classes), |
618 | E_TP_INV_PVAL, ts_inv_aclass, respond, | |
619 | ((caddr_t)aclass) - (caddr_t)hdr); | |
b7fb0758 KS |
620 | IFDEBUG(D_TPINPUT) |
621 | printf("alt_classes 0x%x\n", alt_classes); | |
622 | ENDDEBUG | |
623 | } | |
624 | break; | |
625 | ||
626 | case TPP_security: | |
627 | case TPP_residER: | |
628 | case TPP_priority: | |
629 | case TPP_transdelay: | |
630 | case TPP_throughput: | |
631 | case TPP_addl_info: | |
632 | case TPP_subseq: | |
d9a01c3e | 633 | default: |
b7fb0758 KS |
634 | IFDEBUG(D_TPINPUT) |
635 | printf("param ignored CR_TPDU code= 0x%x\n", | |
636 | vbptr(P)->tpv_code); | |
637 | ENDDEBUG | |
638 | IncStat(ts_param_ignored); | |
639 | break; | |
640 | ||
641 | case TPP_checksum: | |
642 | IFDEBUG(D_TPINPUT) | |
643 | printf("CR before cksum\n"); | |
644 | ENDDEBUG | |
645 | ||
646 | CHECK( iso_check_csum(m, tpdu_len), | |
647 | E_TP_INV_PVAL, ts_bad_csum, discard, 0) | |
648 | ||
649 | IFDEBUG(D_TPINPUT) | |
650 | printf("CR before cksum\n"); | |
651 | ENDDEBUG | |
652 | break; | |
b7fb0758 KS |
653 | } |
654 | ||
655 | /* } */ END_WHILE_OPTIONS(P) | |
656 | ||
63f88aec | 657 | if (lsufxlen == 0) { |
b7fb0758 KS |
658 | /* can't look for a tpcb w/o any called sufx */ |
659 | error = E_TP_LENGTH_INVAL; | |
660 | IncStat(ts_inv_sufx); | |
661 | goto respond; | |
662 | } else { | |
63f88aec | 663 | register struct tp_pcb *t; |
01acbfa1 KS |
664 | /* |
665 | * The intention here is to trap all CR requests | |
666 | * to a given nsap, for constructing transport | |
667 | * service bridges at user level; so these | |
668 | * intercepts should precede the normal listens. | |
669 | * Phrasing the logic in this way also allows for | |
670 | * mop-up listeners, which we don't currently implement. | |
671 | * We also wish to have a single socket be able to | |
672 | * listen over any network service provider, | |
673 | * (cons or clns or ip). | |
674 | */ | |
823532e9 | 675 | for (t = tp_listeners; t ; t = t->tp_nextlisten) |
01acbfa1 KS |
676 | if ((t->tp_lsuffixlen == 0 || |
677 | (lsufxlen == t->tp_lsuffixlen && | |
678 | bcmp(lsufxloc, t->tp_lsuffix, lsufxlen) == 0)) && | |
679 | ((t->tp_flags & TPF_GENERAL_ADDR) || | |
680 | (laddr->sa_family == t->tp_domain && | |
681 | (*t->tp_nlproto->nlp_cmpnetaddr) | |
682 | (t->tp_npcb, laddr, TP_LOCAL)))) | |
683 | break; | |
684 | ||
63f88aec | 685 | CHECK(t == 0, E_TP_NO_SESSION, ts_inv_sufx, respond, |
b7fb0758 KS |
686 | (1 + 2 + (caddr_t)&hdr->_tpduf - (caddr_t)hdr)) |
687 | /* _tpduf is the fixed part; add 2 to get the dref bits of | |
688 | * the fixed part (can't take the address of a bit field) | |
689 | */ | |
823532e9 KS |
690 | IFDEBUG(D_TPINPUT) |
691 | printf("checking if dup CR\n"); | |
692 | ENDDEBUG | |
63f88aec KS |
693 | tpcb = t; |
694 | for (t = tpcb->tp_next; t != tpcb; t = t->tp_next) { | |
695 | if (sref != t->tp_fref) | |
696 | continue; | |
697 | if ((*tpcb->tp_nlproto->nlp_cmpnetaddr)( | |
698 | t->tp_npcb, faddr, TP_FOREIGN)) { | |
699 | IFDEBUG(D_TPINPUT) | |
700 | printf("duplicate CR discarded\n"); | |
701 | ENDDEBUG | |
702 | goto discard; | |
703 | } | |
704 | } | |
705 | IFTRACE(D_TPINPUT) | |
706 | tptrace(TPPTmisc, "tp_input: tpcb *lsufxloc tpstate", | |
707 | tpcb, *lsufxloc, tpcb->tp_state, 0); | |
708 | ENDTRACE | |
b7fb0758 KS |
709 | } |
710 | ||
711 | /* | |
712 | * WE HAVE A TPCB | |
713 | * already know that the classes in the CR match at least | |
714 | * one class implemented, but we don't know yet if they | |
715 | * include any classes permitted by this server. | |
716 | */ | |
717 | ||
718 | IFDEBUG(D_TPINPUT) | |
719 | printf("HAVE A TPCB 1: 0x%x\n", tpcb); | |
720 | ENDDEBUG | |
721 | IFDEBUG(D_CONN) | |
722 | printf( | |
723 | "CR: bef CHKS: flags 0x%x class_to_use 0x%x alt 0x%x opt 0x%x tp_class 0x%x\n", | |
724 | tpcb->tp_flags, class_to_use, alt_classes, opt, tpcb->tp_class); | |
725 | ENDDEBUG | |
726 | /* tpcb->tp_class doesn't include any classes not implemented */ | |
727 | class_to_use = (preferred_class & tpcb->tp_class); | |
728 | if( (class_to_use = preferred_class & tpcb->tp_class) == 0 ) | |
729 | class_to_use = alt_classes & tpcb->tp_class; | |
730 | ||
731 | class_to_use = 1 << tp_mask_to_num(class_to_use); | |
732 | ||
733 | { | |
734 | tpp = tpcb->_tp_param; | |
735 | tpp.p_class = class_to_use; | |
736 | tpp.p_tpdusize = dusize; | |
d119092b | 737 | tpp.p_ptpdusize = pdusize; |
b7fb0758 KS |
738 | tpp.p_xtd_format = (opt & TPO_XTD_FMT) == TPO_XTD_FMT; |
739 | tpp.p_xpd_service = (addlopt & TPAO_USE_TXPD) == TPAO_USE_TXPD; | |
740 | tpp.p_use_checksum = (tpp.p_class == TP_CLASS_0)?0: | |
741 | (addlopt & TPAO_NO_CSUM) == 0; | |
10c42688 | 742 | tpp.p_version = version; |
b7fb0758 KS |
743 | #ifdef notdef |
744 | tpp.p_use_efc = (opt & TPO_USE_EFC) == TPO_USE_EFC; | |
745 | tpp.p_use_nxpd = (addlopt & TPAO_USE_NXPD) == TPAO_USE_NXPD; | |
746 | tpp.p_use_rcc = (addlopt & TPAO_USE_RCC) == TPAO_USE_RCC; | |
4d8170e5 | 747 | #endif /* notdef */ |
b7fb0758 KS |
748 | |
749 | CHECK( | |
750 | tp_consistency(tpcb, 0 /* not force or strict */, &tpp) != 0, | |
01acbfa1 | 751 | E_TP_NEGOT_FAILED, ts_negotfailed, clear_parent_tcb, |
b7fb0758 KS |
752 | (1 + 2 + (caddr_t)&hdr->_tpdufr.CRCC - (caddr_t)hdr) |
753 | /* ^ more or less the location of class */ | |
754 | ) | |
755 | } | |
756 | IFTRACE(D_CONN) | |
757 | tptrace(TPPTmisc, | |
758 | "after 1 consist class_to_use class, out, tpconsout", | |
759 | class_to_use, | |
760 | tpcb->tp_class, dgout_routine, tpcons_output | |
761 | ); | |
762 | ENDTRACE | |
763 | CHECK( | |
764 | ((class_to_use == TP_CLASS_0)&&(dgout_routine != tpcons_output)), | |
01acbfa1 | 765 | E_TP_NEGOT_FAILED, ts_negotfailed, clear_parent_tcb, |
b7fb0758 KS |
766 | (1 + 2 + (caddr_t)&hdr->_tpdufr.CRCC - (caddr_t)hdr) |
767 | /* ^ more or less the location of class */ | |
768 | ) | |
769 | IFDEBUG(D_CONN) | |
770 | printf("CR: after CRCCCHECKS: tpcb 0x%x, flags 0x%x\n", | |
771 | tpcb, tpcb->tp_flags); | |
772 | ENDDEBUG | |
773 | takes_data = TRUE; | |
774 | e.ATTR(CR_TPDU).e_cdt = hdr->tpdu_CRcdt; | |
775 | e.ev_number = CR_TPDU; | |
776 | ||
777 | so = tpcb->tp_sock; | |
778 | if (so->so_options & SO_ACCEPTCONN) { | |
63f88aec | 779 | struct tp_pcb *parent_tpcb = tpcb; |
b7fb0758 KS |
780 | /* |
781 | * Create a socket, tpcb, ll pcb, etc. | |
782 | * for this newborn connection, and fill in all the values. | |
783 | */ | |
784 | IFDEBUG(D_CONN) | |
785 | printf("abt to call tp_newsocket(0x%x, 0x%x, 0x%x, 0x%x)\n", | |
786 | so, laddr, faddr, cons_channel); | |
787 | ENDDEBUG | |
788 | if( (so = | |
789 | tp_newsocket(so, faddr, cons_channel, | |
790 | class_to_use, | |
a50e2bc0 KS |
791 | ((tpcb->tp_netservice == IN_CLNS) ? IN_CLNS : |
792 | (dgout_routine == tpcons_output)?ISO_CONS:ISO_CLNS)) | |
b7fb0758 KS |
793 | ) == (struct socket *)0 ) { |
794 | /* note - even if netservice is IN_CLNS, as far as | |
795 | * the tp entity is concerned, the only differences | |
a50e2bc0 | 796 | * are CO vs CL |
b7fb0758 KS |
797 | */ |
798 | IFDEBUG(D_CONN) | |
799 | printf("tp_newsocket returns 0\n"); | |
800 | ENDDEBUG | |
801 | goto discard; | |
01acbfa1 KS |
802 | clear_parent_tcb: |
803 | tpcb = 0; | |
804 | goto respond; | |
b7fb0758 KS |
805 | } |
806 | tpcb = sototpcb(so); | |
823532e9 | 807 | insque(tpcb, parent_tpcb); |
b7fb0758 | 808 | |
b7fb0758 | 809 | /* |
a50e2bc0 | 810 | * Stash the addresses in the net level pcb |
b7fb0758 KS |
811 | * kind of like a pcbconnect() but don't need |
812 | * or want all those checks. | |
813 | */ | |
f15f73d2 KS |
814 | (tpcb->tp_nlproto->nlp_putnetaddr)(tpcb->tp_npcb, faddr, TP_FOREIGN); |
815 | (tpcb->tp_nlproto->nlp_putnetaddr)(tpcb->tp_npcb, laddr, TP_LOCAL); | |
b7fb0758 | 816 | |
a50e2bc0 | 817 | /* stash the f suffix in the new tpcb */ |
01acbfa1 KS |
818 | if (tpcb->tp_fsuffixlen = fsufxlen) { |
819 | bcopy(fsufxloc, tpcb->tp_fsuffix, fsufxlen); | |
820 | (tpcb->tp_nlproto->nlp_putsufx) | |
821 | (tpcb->tp_npcb, fsufxloc, fsufxlen, TP_FOREIGN); | |
822 | } | |
823 | /* stash the l suffix in the new tpcb */ | |
824 | tpcb->tp_lsuffixlen = lsufxlen; | |
825 | bcopy(lsufxloc, tpcb->tp_lsuffix, lsufxlen); | |
44f52ea5 | 826 | (tpcb->tp_nlproto->nlp_putsufx) |
f15f73d2 | 827 | (tpcb->tp_npcb, lsufxloc, lsufxlen, TP_LOCAL); |
b7fb0758 KS |
828 | #ifdef TP_PERF_MEAS |
829 | if( tpcb->tp_perf_on = perf_meas ) { /* assignment */ | |
830 | /* ok, let's create an mbuf for stashing the | |
831 | * statistics if one doesn't already exist | |
832 | */ | |
833 | (void) tp_setup_perf(tpcb); | |
834 | } | |
4d8170e5 | 835 | #endif /* TP_PERF_MEAS */ |
b7fb0758 KS |
836 | tpcb->tp_fref = sref; |
837 | ||
838 | /* We've already checked for consistency with the options | |
839 | * set in tpp, but we couldn't set them earlier because | |
840 | * we didn't want to change options in the LISTENING tpcb. | |
841 | * Now we set the options in the new socket's tpcb. | |
842 | */ | |
843 | (void) tp_consistency( tpcb, TP_FORCE, &tpp); | |
844 | ||
845 | if(!tpcb->tp_use_checksum) | |
846 | IncStat(ts_csum_off); | |
847 | if(tpcb->tp_xpd_service) | |
848 | IncStat(ts_use_txpd); | |
849 | if(tpcb->tp_xtd_format) | |
850 | IncStat(ts_xtd_fmt); | |
851 | ||
b7fb0758 KS |
852 | tpcb->tp_peer_acktime = acktime; |
853 | ||
854 | /* | |
855 | * The following kludge is used to test retransmissions and | |
856 | * timeout during connection establishment. | |
857 | */ | |
858 | IFDEBUG(D_ZDREF) | |
859 | IncStat(ts_zdebug); | |
a50e2bc0 | 860 | /*tpcb->tp_fref = 0;*/ |
b7fb0758 KS |
861 | ENDDEBUG |
862 | } | |
8c123bbf | 863 | LOCAL_CREDIT(tpcb); |
b7fb0758 | 864 | IncStat(ts_CR_rcvd); |
20650f15 KS |
865 | if (!tpcb->tp_cebit_off) { |
866 | tpcb->tp_win_recv = tp_start_win << 8; | |
867 | tpcb->tp_cong_sample.cs_size = 0; | |
20650f15 KS |
868 | CONG_INIT_SAMPLE(tpcb); |
869 | CONG_UPDATE_SAMPLE(tpcb, ce_bit); | |
870 | } | |
b7fb0758 KS |
871 | } else if ( dutype == ER_TPDU_type ) { |
872 | /* | |
873 | * ER TPDUs have to be recognized separately | |
874 | * because they don't necessarily have a tpcb | |
875 | * with them and we don't want err out looking for such | |
876 | * a beast. | |
877 | * We could put a bunch of little kludges in the | |
878 | * next section of code so it would avoid references to tpcb | |
879 | * if dutype == ER_TPDU_type but we don't want code for ERs to | |
880 | * mess up code for data transfer. | |
881 | */ | |
882 | IncStat(ts_ER_rcvd); | |
883 | e.ev_number = ER_TPDU; | |
884 | e.ATTR(ER_TPDU).e_reason = (u_char)hdr->tpdu_ERreason; | |
3a2fbed9 | 885 | CHECK (((int)dref <= 0 || dref >= tp_refinfo.tpr_size || |
0b673a61 | 886 | (tpcb = tp_ref[dref].tpr_pcb ) == (struct tp_pcb *) 0 || |
bdf41b09 KS |
887 | tpcb->tp_refstate == REF_FREE || |
888 | tpcb->tp_refstate == REF_FROZEN), | |
0b673a61 KS |
889 | E_TP_MISM_REFS, ts_inv_dref, discard, 0) |
890 | ||
b7fb0758 KS |
891 | } else { |
892 | /* tpdu type is CC, XPD, XAK, GR, AK, DR, DC, or DT */ | |
893 | ||
894 | /* In the next 4 checks, | |
895 | * _tpduf is the fixed part; add 2 to get the dref bits of | |
896 | * the fixed part (can't take the address of a bit field) | |
897 | */ | |
01acbfa1 KS |
898 | #ifdef TPCONS |
899 | if (cons_channel && dutype == DT_TPDU_type) { | |
900 | struct isopcb *isop = ((struct isopcb *) | |
901 | ((struct pklcd *)cons_channel)->lcd_upnext); | |
902 | if (isop && isop->isop_refcnt == 1 && isop->isop_socket && | |
903 | (tpcb = sototpcb(isop->isop_socket)) && | |
904 | (tpcb->tp_class == TP_CLASS_0/* || == CLASS_1 */)) { | |
905 | IFDEBUG(D_TPINPUT) | |
906 | printf("tpinput_dt: class 0 short circuit\n"); | |
907 | ENDDEBUG | |
908 | dref = tpcb->tp_lref; | |
909 | sref = tpcb->tp_fref; | |
bdf41b09 | 910 | CHECK( (tpcb->tp_refstate == REF_FREE), |
01acbfa1 KS |
911 | E_TP_MISM_REFS,ts_inv_dref, nonx_dref, |
912 | (1 + 2 + (caddr_t)&hdr->_tpduf - (caddr_t)hdr)) | |
913 | goto tp0_data; | |
914 | } | |
b7fb0758 | 915 | |
01acbfa1 | 916 | } |
194a383a | 917 | #endif |
194a383a | 918 | { |
b7fb0758 | 919 | |
3a2fbed9 | 920 | CHECK( ((int)dref <= 0 || dref >= tp_refinfo.tpr_size) , |
facaece3 | 921 | E_TP_MISM_REFS,ts_inv_dref, nonx_dref, |
b7fb0758 KS |
922 | (1 + 2 + (caddr_t)&hdr->_tpduf - (caddr_t)hdr)) |
923 | CHECK( ((tpcb = tp_ref[dref].tpr_pcb ) == (struct tp_pcb *) 0 ), | |
facaece3 | 924 | E_TP_MISM_REFS,ts_inv_dref, nonx_dref, |
b7fb0758 | 925 | (1 + 2 + (caddr_t)&hdr->_tpduf - (caddr_t)hdr)) |
bdf41b09 | 926 | CHECK( (tpcb->tp_refstate == REF_FREE), |
facaece3 | 927 | E_TP_MISM_REFS,ts_inv_dref, nonx_dref, |
b7fb0758 KS |
928 | (1 + 2 + (caddr_t)&hdr->_tpduf - (caddr_t)hdr)) |
929 | } | |
930 | ||
931 | IFDEBUG(D_TPINPUT) | |
932 | printf("HAVE A TPCB 2: 0x%x\n", tpcb); | |
933 | ENDDEBUG | |
934 | ||
935 | /* causes a DR to be sent for CC; ER for all else */ | |
bdf41b09 | 936 | CHECK( (tpcb->tp_refstate == REF_FROZEN), |
b7fb0758 KS |
937 | (dutype == CC_TPDU_type?E_TP_NO_SESSION:E_TP_MISM_REFS), |
938 | ts_inv_dref, respond, | |
939 | (1 + 2 + (caddr_t)&hdr->_tpduf - (caddr_t)hdr)) | |
940 | ||
941 | IFDEBUG(D_TPINPUT) | |
942 | printf("state of dref %d ok, tpcb 0x%x\n", dref,tpcb); | |
943 | ENDDEBUG | |
944 | /* | |
945 | * At this point the state of the dref could be | |
946 | * FROZEN: tpr_pcb == NULL, has ( reference only) timers | |
947 | * for example, DC may arrive after the close() has detached | |
948 | * the tpcb (e.g., if user turned off SO_LISTEN option) | |
949 | * OPENING : a tpcb exists but no timers yet | |
950 | * OPEN : tpcb exists & timers are outstanding | |
951 | */ | |
952 | ||
20650f15 KS |
953 | if (!tpcb->tp_cebit_off) |
954 | CONG_UPDATE_SAMPLE(tpcb, ce_bit); | |
955 | ||
b7fb0758 | 956 | dusize = tpcb->tp_tpdusize; |
d119092b | 957 | pdusize = tpcb->tp_ptpdusize; |
b7fb0758 KS |
958 | |
959 | dutype = hdr->tpdu_type << 8; /* for the switch below */ | |
960 | ||
961 | WHILE_OPTIONS(P, hdr, tpcb->tp_xtd_format) /* { */ | |
962 | ||
a50e2bc0 | 963 | #define caseof(x,y) case (((x)<<8)+(y)) |
b7fb0758 KS |
964 | switch( dutype | vbptr(P)->tpv_code ) { |
965 | ||
966 | caseof( CC_TPDU_type, TPP_addl_opt ): | |
967 | /* not in class 0; 1 octet */ | |
968 | vb_getval(P, u_char, addlopt); | |
969 | break; | |
970 | caseof( CC_TPDU_type, TPP_tpdu_size ): | |
facaece3 KS |
971 | { |
972 | u_char odusize = dusize; | |
b7fb0758 | 973 | vb_getval(P, u_char, dusize); |
facaece3 KS |
974 | CHECK( (dusize < TP_MIN_TPDUSIZE || |
975 | dusize > TP_MAX_TPDUSIZE || dusize > odusize), | |
976 | E_TP_INV_PVAL, ts_inv_pval, respond, | |
977 | (1 + (caddr_t)&vbptr(P)->tpv_val - (caddr_t)hdr) ) | |
b7fb0758 KS |
978 | IFDEBUG(D_TPINPUT) |
979 | printf("CC dusize 0x%x\n", dusize); | |
980 | ENDDEBUG | |
facaece3 | 981 | } |
b7fb0758 | 982 | break; |
d119092b KS |
983 | caseof( CC_TPDU_type, TPP_ptpdu_size ): |
984 | { | |
985 | u_short opdusize = pdusize; | |
986 | switch (vbptr(P)->tpv_len) { | |
987 | case 1: pdusize = vbval(P, u_char); break; | |
988 | case 2: pdusize = ntohs(vbval(P, u_short)); break; | |
989 | default: ; | |
990 | IFDEBUG(D_TPINPUT) | |
991 | printf("malformed prefered TPDU option\n"); | |
992 | ENDDEBUG | |
993 | } | |
994 | CHECK( (pdusize == 0 || | |
995 | (opdusize && (pdusize > opdusize))), | |
996 | E_TP_INV_PVAL, ts_inv_pval, respond, | |
997 | (1 + (caddr_t)&vbptr(P)->tpv_val - (caddr_t)hdr) ) | |
998 | } | |
999 | break; | |
b7fb0758 KS |
1000 | caseof( CC_TPDU_type, TPP_calling_sufx): |
1001 | IFDEBUG(D_TPINPUT) | |
1002 | printf("CC calling (local) sufxlen 0x%x\n", lsufxlen); | |
1003 | ENDDEBUG | |
1004 | lsufxloc = (caddr_t) &vbptr(P)->tpv_val; | |
1005 | lsufxlen = vbptr(P)->tpv_len; | |
1006 | break; | |
1007 | caseof( CC_TPDU_type, TPP_acktime ): | |
1008 | /* class 4 only, 2 octets */ | |
1009 | vb_getval(P, u_short, acktime); | |
d9a01c3e | 1010 | acktime = ntohs(acktime); |
b7fb0758 KS |
1011 | acktime = acktime/500; /* convert to slowtimo ticks */ |
1012 | if( (short)acktime <=0 ) | |
1013 | acktime = 2; | |
1014 | break; | |
1015 | caseof( CC_TPDU_type, TPP_called_sufx): | |
1016 | fsufxloc = (caddr_t) &vbptr(P)->tpv_val; | |
1017 | fsufxlen = vbptr(P)->tpv_len; | |
1018 | IFDEBUG(D_TPINPUT) | |
1019 | printf("CC called (foreign) sufx len %d\n", fsufxlen); | |
1020 | ENDDEBUG | |
1021 | break; | |
1022 | ||
1023 | caseof( CC_TPDU_type, TPP_checksum): | |
1024 | caseof( DR_TPDU_type, TPP_checksum): | |
1025 | caseof( DT_TPDU_type, TPP_checksum): | |
1026 | caseof( XPD_TPDU_type, TPP_checksum): | |
1027 | if( tpcb->tp_use_checksum ) { | |
1028 | CHECK( iso_check_csum(m, tpdu_len), | |
1029 | E_TP_INV_PVAL, ts_bad_csum, discard, 0) | |
1030 | } | |
1031 | break; | |
1032 | ||
1033 | /* this is different from the above because in the context | |
1034 | * of concat/ sep tpdu_len might not be the same as hdr len | |
1035 | */ | |
1036 | caseof( AK_TPDU_type, TPP_checksum): | |
1037 | caseof( XAK_TPDU_type, TPP_checksum): | |
1038 | caseof( DC_TPDU_type, TPP_checksum): | |
1039 | if( tpcb->tp_use_checksum ) { | |
a50e2bc0 | 1040 | CHECK( iso_check_csum(m, (int)hdr->tpdu_li + 1), |
b7fb0758 KS |
1041 | E_TP_INV_PVAL, ts_bad_csum, discard, 0) |
1042 | } | |
1043 | break; | |
1044 | #ifdef notdef | |
1045 | caseof( DR_TPDU_type, TPP_addl_info ): | |
1046 | /* ignore - its length and meaning are | |
1047 | * user defined and there's no way | |
1048 | * to pass this info to the user anyway | |
1049 | */ | |
1050 | break; | |
4d8170e5 | 1051 | #endif /* notdef */ |
b7fb0758 KS |
1052 | |
1053 | caseof( AK_TPDU_type, TPP_subseq ): | |
1054 | /* used after reduction of window */ | |
1055 | vb_getval(P, u_short, subseq); | |
1056 | subseq = ntohs(subseq); | |
1057 | IFDEBUG(D_ACKRECV) | |
bdf41b09 | 1058 | printf("AK dref 0x%x Subseq 0x%x\n", dref, subseq); |
b7fb0758 KS |
1059 | ENDDEBUG |
1060 | break; | |
1061 | ||
1062 | caseof( AK_TPDU_type, TPP_flow_cntl_conf ): | |
1063 | { | |
1064 | u_int ylwe; | |
1065 | u_short ysubseq, ycredit; | |
1066 | ||
1067 | fcc_present = TRUE; | |
1068 | vb_getval(P, u_int, ylwe); | |
1069 | vb_getval(P, u_short, ysubseq); | |
1070 | vb_getval(P, u_short, ycredit); | |
1071 | ylwe = ntohl(ylwe); | |
1072 | ysubseq = ntohs(ysubseq); | |
1073 | ycredit = ntohs(ycredit); | |
1074 | IFDEBUG(D_ACKRECV) | |
bdf41b09 KS |
1075 | printf("%s%x, subseq 0x%x, cdt 0x%x dref 0x%x\n", |
1076 | "AK FCC lwe 0x", ylwe, ysubseq, ycredit, dref); | |
b7fb0758 KS |
1077 | ENDDEBUG |
1078 | } | |
1079 | break; | |
1080 | ||
1081 | default: | |
1082 | IFDEBUG(D_TPINPUT) | |
1083 | printf("param ignored dutype 0x%x, code 0x%x\n", | |
1084 | dutype, vbptr(P)->tpv_code); | |
1085 | ENDDEBUG | |
1086 | IFTRACE(D_TPINPUT) | |
1087 | tptrace(TPPTmisc, "param ignored dutype code ", | |
1088 | dutype, vbptr(P)->tpv_code ,0,0); | |
1089 | ENDTRACE | |
1090 | IncStat(ts_param_ignored); | |
1091 | break; | |
1092 | #undef caseof | |
1093 | } | |
1094 | /* } */ END_WHILE_OPTIONS(P) | |
1095 | ||
1096 | /* NOTE: the variable dutype has been shifted left! */ | |
1097 | ||
1098 | switch( hdr->tpdu_type ) { | |
1099 | case CC_TPDU_type: | |
1100 | /* If CC comes back with an unacceptable class | |
1101 | * respond with a DR or ER | |
1102 | */ | |
1103 | ||
1104 | opt = hdr->tpdu_CCoptions; /* 1 byte */ | |
1105 | ||
1106 | { | |
1107 | tpp = tpcb->_tp_param; | |
1108 | tpp.p_class = (1<<hdr->tpdu_CCclass); | |
1109 | tpp.p_tpdusize = dusize; | |
d119092b | 1110 | tpp.p_ptpdusize = pdusize; |
b7fb0758 KS |
1111 | tpp.p_dont_change_params = 0; |
1112 | tpp.p_xtd_format = (opt & TPO_XTD_FMT) == TPO_XTD_FMT; | |
1113 | tpp.p_xpd_service = (addlopt & TPAO_USE_TXPD) == TPAO_USE_TXPD; | |
1114 | tpp.p_use_checksum = (addlopt & TPAO_NO_CSUM) == 0; | |
1115 | #ifdef notdef | |
1116 | tpp.p_use_efc = (opt & TPO_USE_EFC) == TPO_USE_EFC; | |
1117 | tpp.p_use_nxpd = (addlopt & TPAO_USE_NXPD) == TPAO_USE_NXPD; | |
1118 | tpp.p_use_rcc = (addlopt & TPAO_USE_RCC) == TPAO_USE_RCC; | |
4d8170e5 | 1119 | #endif /* notdef */ |
b7fb0758 KS |
1120 | |
1121 | CHECK( | |
1122 | tp_consistency(tpcb, TP_FORCE, &tpp) != 0, | |
1123 | E_TP_NEGOT_FAILED, ts_negotfailed, respond, | |
1124 | (1 + 2 + (caddr_t)&hdr->_tpdufr.CRCC - (caddr_t)hdr) | |
1125 | /* ^ more or less the location of class */ | |
1126 | ) | |
1127 | IFTRACE(D_CONN) | |
1128 | tptrace(TPPTmisc, | |
1129 | "after 1 consist class, out, tpconsout", | |
1130 | tpcb->tp_class, dgout_routine, tpcons_output, 0 | |
1131 | ); | |
1132 | ENDTRACE | |
1133 | CHECK( | |
1134 | ((class_to_use == TP_CLASS_0)&& | |
1135 | (dgout_routine != tpcons_output)), | |
1136 | E_TP_NEGOT_FAILED, ts_negotfailed, respond, | |
1137 | (1 + 2 + (caddr_t)&hdr->_tpdufr.CRCC - (caddr_t)hdr) | |
1138 | /* ^ more or less the location of class */ | |
1139 | ) | |
194a383a KS |
1140 | #ifdef TPCONS |
1141 | if (tpcb->tp_netservice == ISO_CONS && | |
1142 | class_to_use == TP_CLASS_0) { | |
1143 | struct isopcb *isop = (struct isopcb *)tpcb->tp_npcb; | |
1144 | struct pklcd *lcp = (struct pklcd *)isop->isop_chan; | |
1145 | lcp->lcd_flags &= ~X25_DG_CIRCUIT; | |
1146 | } | |
1147 | #endif | |
b7fb0758 KS |
1148 | } |
1149 | if( ! tpcb->tp_use_checksum) | |
1150 | IncStat(ts_csum_off); | |
1151 | if(tpcb->tp_xpd_service) | |
1152 | IncStat(ts_use_txpd); | |
1153 | if(tpcb->tp_xtd_format) | |
1154 | IncStat(ts_xtd_fmt); | |
1155 | ||
1156 | IFTRACE(D_CONN) | |
1157 | tptrace(TPPTmisc, "after CC class flags dusize CCclass", | |
1158 | tpcb->tp_class, tpcb->tp_flags, tpcb->tp_tpdusize, | |
1159 | hdr->tpdu_CCclass); | |
1160 | ENDTRACE | |
1161 | ||
b7fb0758 KS |
1162 | /* if called or calling suffices appeared on the CC, |
1163 | * they'd better jive with what's in the pcb | |
1164 | */ | |
1165 | if( fsufxlen ) { | |
1166 | CHECK( ((tpcb->tp_fsuffixlen != fsufxlen) || | |
1167 | bcmp(fsufxloc, tpcb->tp_fsuffix, fsufxlen)), | |
1168 | E_TP_INV_PVAL,ts_inv_sufx, respond, | |
1169 | (1+fsufxloc - (caddr_t)hdr)) | |
1170 | } | |
1171 | if( lsufxlen ) { | |
1172 | CHECK( ((tpcb->tp_lsuffixlen != lsufxlen) || | |
1173 | bcmp(lsufxloc, tpcb->tp_lsuffix, lsufxlen)), | |
1174 | E_TP_INV_PVAL,ts_inv_sufx, respond, | |
1175 | (1+lsufxloc - (caddr_t)hdr)) | |
1176 | } | |
1177 | ||
b7fb0758 | 1178 | e.ATTR(CC_TPDU).e_sref = sref; |
b7fb0758 KS |
1179 | e.ATTR(CC_TPDU).e_cdt = hdr->tpdu_CCcdt; |
1180 | takes_data = TRUE; | |
1181 | e.ev_number = CC_TPDU; | |
1182 | IncStat(ts_CC_rcvd); | |
1183 | break; | |
1184 | ||
1185 | case DC_TPDU_type: | |
b7fb0758 KS |
1186 | if (sref != tpcb->tp_fref) |
1187 | printf("INPUT: inv sufx DCsref 0x%x, tp_fref 0x%x\n", | |
1188 | sref, tpcb->tp_fref); | |
b7fb0758 | 1189 | |
b7fb0758 | 1190 | CHECK( (sref != tpcb->tp_fref), |
facaece3 | 1191 | E_TP_MISM_REFS, ts_inv_sufx, discard, |
b7fb0758 | 1192 | (1 + (caddr_t)&hdr->tpdu_DCsref - (caddr_t)hdr)) |
facaece3 | 1193 | |
b7fb0758 KS |
1194 | e.ev_number = DC_TPDU; |
1195 | IncStat(ts_DC_rcvd); | |
1196 | break; | |
1197 | ||
1198 | case DR_TPDU_type: | |
1199 | IFTRACE(D_TPINPUT) | |
1200 | tptrace(TPPTmisc, "DR recvd", hdr->tpdu_DRreason, 0, 0, 0); | |
1201 | ENDTRACE | |
facaece3 | 1202 | if (sref != tpcb->tp_fref) { |
b7fb0758 KS |
1203 | printf("INPUT: inv sufx DRsref 0x%x tp_fref 0x%x\n", |
1204 | sref, tpcb->tp_fref); | |
facaece3 | 1205 | } |
b7fb0758 | 1206 | |
facaece3 KS |
1207 | CHECK( (sref != 0 && sref != tpcb->tp_fref && |
1208 | tpcb->tp_state != TP_CRSENT), | |
1209 | (TP_ERROR_SNDC | E_TP_MISM_REFS),ts_inv_sufx, respond, | |
b7fb0758 KS |
1210 | (1 + (caddr_t)&hdr->tpdu_DRsref - (caddr_t)hdr)) |
1211 | ||
1212 | e.ATTR(DR_TPDU).e_reason = hdr->tpdu_DRreason; | |
1213 | e.ATTR(DR_TPDU).e_sref = (u_short)sref; | |
b7fb0758 KS |
1214 | takes_data = TRUE; |
1215 | e.ev_number = DR_TPDU; | |
1216 | IncStat(ts_DR_rcvd); | |
1217 | break; | |
1218 | ||
1219 | case ER_TPDU_type: | |
1220 | IFTRACE(D_TPINPUT) | |
1221 | tptrace(TPPTmisc, "ER recvd", hdr->tpdu_ERreason,0,0,0); | |
1222 | ENDTRACE | |
1223 | e.ev_number = ER_TPDU; | |
1224 | e.ATTR(ER_TPDU).e_reason = hdr->tpdu_ERreason; | |
1225 | IncStat(ts_ER_rcvd); | |
1226 | break; | |
1227 | ||
1228 | case AK_TPDU_type: | |
1229 | ||
1230 | e.ATTR(AK_TPDU).e_subseq = subseq; | |
1231 | e.ATTR(AK_TPDU).e_fcc_present = fcc_present; | |
1232 | ||
1233 | if (tpcb->tp_xtd_format) { | |
1234 | #ifdef BYTE_ORDER | |
1235 | union seq_type seqeotX; | |
1236 | ||
1237 | seqeotX.s_seqeot = ntohl(hdr->tpdu_seqeotX); | |
1238 | e.ATTR(AK_TPDU).e_seq = seqeotX.s_seq; | |
1239 | e.ATTR(AK_TPDU).e_cdt = ntohs(hdr->tpdu_AKcdtX); | |
1240 | #else | |
1241 | e.ATTR(AK_TPDU).e_cdt = hdr->tpdu_AKcdtX; | |
1242 | e.ATTR(AK_TPDU).e_seq = hdr->tpdu_AKseqX; | |
4d8170e5 | 1243 | #endif /* BYTE_ORDER */ |
b7fb0758 KS |
1244 | } else { |
1245 | e.ATTR(AK_TPDU).e_cdt = hdr->tpdu_AKcdt; | |
1246 | e.ATTR(AK_TPDU).e_seq = hdr->tpdu_AKseq; | |
1247 | } | |
1248 | IFTRACE(D_TPINPUT) | |
1249 | tptrace(TPPTmisc, "AK recvd seq cdt subseq fcc_pres", | |
1250 | e.ATTR(AK_TPDU).e_seq, e.ATTR(AK_TPDU).e_cdt, | |
1251 | subseq, fcc_present); | |
1252 | ENDTRACE | |
1253 | ||
1254 | e.ev_number = AK_TPDU; | |
1255 | IncStat(ts_AK_rcvd); | |
1256 | IncPStat(tpcb, tps_AK_rcvd); | |
1257 | break; | |
1258 | ||
1259 | case XAK_TPDU_type: | |
1260 | if (tpcb->tp_xtd_format) { | |
1261 | #ifdef BYTE_ORDER | |
1262 | union seq_type seqeotX; | |
1263 | ||
1264 | seqeotX.s_seqeot = ntohl(hdr->tpdu_seqeotX); | |
1265 | e.ATTR(XAK_TPDU).e_seq = seqeotX.s_seq; | |
1266 | #else | |
1267 | e.ATTR(XAK_TPDU).e_seq = hdr->tpdu_XAKseqX; | |
4d8170e5 | 1268 | #endif /* BYTE_ORDER */ |
b7fb0758 KS |
1269 | } else { |
1270 | e.ATTR(XAK_TPDU).e_seq = hdr->tpdu_XAKseq; | |
1271 | } | |
1272 | e.ev_number = XAK_TPDU; | |
1273 | IncStat(ts_XAK_rcvd); | |
1274 | IncPStat(tpcb, tps_XAK_rcvd); | |
1275 | break; | |
1276 | ||
1277 | case XPD_TPDU_type: | |
1278 | if (tpcb->tp_xtd_format) { | |
1279 | #ifdef BYTE_ORDER | |
1280 | union seq_type seqeotX; | |
1281 | ||
1282 | seqeotX.s_seqeot = ntohl(hdr->tpdu_seqeotX); | |
1283 | e.ATTR(XPD_TPDU).e_seq = seqeotX.s_seq; | |
1284 | #else | |
1285 | e.ATTR(XPD_TPDU).e_seq = hdr->tpdu_XPDseqX; | |
4d8170e5 | 1286 | #endif /* BYTE_ORDER */ |
b7fb0758 KS |
1287 | } else { |
1288 | e.ATTR(XPD_TPDU).e_seq = hdr->tpdu_XPDseq; | |
1289 | } | |
1290 | takes_data = TRUE; | |
1291 | e.ev_number = XPD_TPDU; | |
1292 | IncStat(ts_XPD_rcvd); | |
1293 | IncPStat(tpcb, tps_XPD_rcvd); | |
1294 | break; | |
1295 | ||
1296 | case DT_TPDU_type: | |
1297 | { /* the y option will cause occasional packets to be dropped. | |
1298 | * A little crude but it works. | |
1299 | */ | |
1300 | ||
1301 | IFDEBUG(D_DROP) | |
1302 | if(time.tv_usec & 0x4 && hdr->tpdu_DTseq & 0x1) { | |
1303 | IncStat(ts_ydebug); | |
1304 | goto discard; | |
1305 | } | |
1306 | ENDDEBUG | |
1307 | } | |
1308 | if (tpcb->tp_class == TP_CLASS_0) { | |
01acbfa1 | 1309 | tp0_data: |
b7fb0758 KS |
1310 | e.ATTR(DT_TPDU).e_seq = 0; /* actually don't care */ |
1311 | e.ATTR(DT_TPDU).e_eot = (((struct tp0du *)hdr)->tp0du_eot); | |
1312 | } else if (tpcb->tp_xtd_format) { | |
1313 | #ifdef BYTE_ORDER | |
1314 | union seq_type seqeotX; | |
1315 | ||
1316 | seqeotX.s_seqeot = ntohl(hdr->tpdu_seqeotX); | |
1317 | e.ATTR(DT_TPDU).e_seq = seqeotX.s_seq; | |
1318 | e.ATTR(DT_TPDU).e_eot = seqeotX.s_eot; | |
1319 | #else | |
1320 | e.ATTR(DT_TPDU).e_seq = hdr->tpdu_DTseqX; | |
1321 | e.ATTR(DT_TPDU).e_eot = hdr->tpdu_DTeotX; | |
4d8170e5 | 1322 | #endif /* BYTE_ORDER */ |
b7fb0758 KS |
1323 | } else { |
1324 | e.ATTR(DT_TPDU).e_seq = hdr->tpdu_DTseq; | |
1325 | e.ATTR(DT_TPDU).e_eot = hdr->tpdu_DTeot; | |
1326 | } | |
1327 | if(e.ATTR(DT_TPDU).e_eot) | |
1328 | IncStat(ts_eot_input); | |
1329 | takes_data = TRUE; | |
1330 | e.ev_number = DT_TPDU; | |
1331 | IncStat(ts_DT_rcvd); | |
1332 | IncPStat(tpcb, tps_DT_rcvd); | |
1333 | break; | |
1334 | ||
1335 | case GR_TPDU_type: | |
1336 | tp_indicate(T_DISCONNECT, tpcb, ECONNABORTED); | |
1337 | /* drop through */ | |
1338 | default: | |
1339 | /* this should NEVER happen because there is a | |
1340 | * check for dutype well above here | |
1341 | */ | |
1342 | error = E_TP_INV_TPDU; /* causes an ER */ | |
1343 | IFDEBUG(D_TPINPUT) | |
1344 | printf("INVALID dutype 0x%x\n", hdr->tpdu_type); | |
1345 | ENDDEBUG | |
1346 | IncStat(ts_inv_dutype); | |
1347 | goto respond; | |
1348 | } | |
1349 | } | |
b7fb0758 KS |
1350 | /* peel off the tp header; |
1351 | * remember that the du_li doesn't count itself. | |
1352 | * This may leave us w/ an empty mbuf at the front of a chain. | |
1353 | * We can't just throw away the empty mbuf because hdr still points | |
1354 | * into the mbuf's data area and we're still using hdr (the tpdu header) | |
1355 | */ | |
1356 | m->m_len -= ((int)hdr->tpdu_li + 1); | |
a50e2bc0 | 1357 | m->m_data += ((int)hdr->tpdu_li + 1); |
b7fb0758 | 1358 | |
a50e2bc0 KS |
1359 | if (takes_data) { |
1360 | int max = tpdu_info[ hdr->tpdu_type ] [TP_MAX_DATA_INDEX]; | |
1361 | int datalen = tpdu_len - hdr->tpdu_li - 1, mbtype = MT_DATA; | |
c71927bd KS |
1362 | struct { |
1363 | struct tp_disc_reason dr; | |
1364 | struct cmsghdr x_hdr; | |
1365 | } x; | |
1366 | #define c_hdr x.x_hdr | |
1367 | register struct mbuf *n; | |
b7fb0758 | 1368 | |
a50e2bc0 KS |
1369 | CHECK( (max && datalen > max), E_TP_LENGTH_INVAL, |
1370 | ts_inv_length, respond, (max + hdr->tpdu_li + 1) ); | |
b7fb0758 | 1371 | switch( hdr->tpdu_type ) { |
a50e2bc0 | 1372 | |
b7fb0758 | 1373 | case CR_TPDU_type: |
a50e2bc0 KS |
1374 | c_hdr.cmsg_type = TPOPT_CONN_DATA; |
1375 | goto make_control_msg; | |
1376 | ||
b7fb0758 | 1377 | case CC_TPDU_type: |
a50e2bc0 KS |
1378 | c_hdr.cmsg_type = TPOPT_CFRM_DATA; |
1379 | goto make_control_msg; | |
1380 | ||
b7fb0758 | 1381 | case DR_TPDU_type: |
c71927bd KS |
1382 | x.dr.dr_hdr.cmsg_len = sizeof(x) - sizeof(c_hdr); |
1383 | x.dr.dr_hdr.cmsg_type = TPOPT_DISC_REASON; | |
1384 | x.dr.dr_hdr.cmsg_level = SOL_TRANSPORT; | |
1385 | x.dr.dr_reason = hdr->tpdu_DRreason; | |
a50e2bc0 KS |
1386 | c_hdr.cmsg_type = TPOPT_DISC_DATA; |
1387 | make_control_msg: | |
c71927bd KS |
1388 | datalen += sizeof(c_hdr); |
1389 | c_hdr.cmsg_len = datalen; | |
a50e2bc0 KS |
1390 | c_hdr.cmsg_level = SOL_TRANSPORT; |
1391 | mbtype = MT_CONTROL; | |
c2bb180a | 1392 | MGET(n, M_DONTWAIT, MT_DATA); |
c71927bd KS |
1393 | if (n == 0) |
1394 | {m_freem(m); m = 0; datalen = 0; goto invoke; } | |
1395 | if (hdr->tpdu_type == DR_TPDU_type) { | |
1396 | datalen += sizeof(x) - sizeof(c_hdr); | |
1397 | bcopy((caddr_t)&x, mtod(n, caddr_t), n->m_len = sizeof(x)); | |
1398 | } else | |
1399 | bcopy((caddr_t)&c_hdr, mtod(n, caddr_t), | |
1400 | n->m_len = sizeof(c_hdr)); | |
1401 | n->m_next = m; | |
1402 | m = n; | |
a50e2bc0 KS |
1403 | /* FALLTHROUGH */ |
1404 | ||
b7fb0758 | 1405 | case XPD_TPDU_type: |
a50e2bc0 KS |
1406 | if (mbtype != MT_CONTROL) |
1407 | mbtype = MT_OOBDATA; | |
1408 | m->m_flags |= M_EOR; | |
1409 | /* FALLTHROUGH */ | |
b7fb0758 | 1410 | |
a50e2bc0 KS |
1411 | case DT_TPDU_type: |
1412 | for (n = m; n; n = n->m_next) { | |
1413 | MCHTYPE(n, mbtype); | |
1414 | } | |
c2bb180a | 1415 | invoke: |
a50e2bc0 | 1416 | e.ATTR(DT_TPDU).e_datalen = datalen; |
b7fb0758 KS |
1417 | e.ATTR(DT_TPDU).e_data = m; |
1418 | break; | |
1419 | ||
1420 | default: | |
1421 | printf( | |
1422 | "ERROR in tp_input! hdr->tpdu_type 0x%x takes_data 0x%x m 0x%x\n", | |
1423 | hdr->tpdu_type, takes_data, m); | |
1424 | break; | |
1425 | } | |
1426 | /* prevent m_freem() after tp_driver() from throwing it all away */ | |
1427 | m = MNULL; | |
1428 | } | |
1429 | ||
1430 | IncStat(ts_tpdu_rcvd); | |
1431 | ||
1432 | IFDEBUG(D_TPINPUT) | |
1433 | printf( "tp_input: before driver, state 0x%x event 0x%x m 0x%x", | |
1434 | tpcb->tp_state, e.ev_number, m ); | |
1435 | printf(" e.e_data 0x%x\n", e.ATTR(DT_TPDU).e_data); | |
1436 | printf("takes_data 0x%x m_len 0x%x, tpdu_len 0x%x\n", | |
1437 | takes_data, (m==MNULL)?0:m->m_len, tpdu_len); | |
1438 | ENDDEBUG | |
1439 | ||
b7fb0758 KS |
1440 | error = tp_driver(tpcb, &e); |
1441 | ||
1442 | ASSERT(tpcb != (struct tp_pcb *)0); | |
1443 | ASSERT(tpcb->tp_sock != (struct socket *)0); | |
1444 | if( tpcb->tp_sock->so_error == 0 ) | |
1445 | tpcb->tp_sock->so_error = error; | |
1446 | ||
1447 | /* Kludge to keep the state tables under control (adding | |
1448 | * data on connect & disconnect & freeing the mbuf containing | |
1449 | * the data would have exploded the tables and made a big mess ). | |
1450 | */ | |
1451 | switch(e.ev_number) { | |
1452 | case CC_TPDU: | |
1453 | case DR_TPDU: | |
1454 | case CR_TPDU: | |
1455 | m = e.ATTR(CC_TPDU).e_data; /* same field for all three dutypes */ | |
1456 | IFDEBUG(D_TPINPUT) | |
1457 | printf("after driver, restoring m to 0x%x, takes_data 0x%x\n", | |
1458 | m, takes_data); | |
1459 | ENDDEBUG | |
1460 | break; | |
1461 | default: | |
1462 | break; | |
1463 | } | |
1464 | /* Concatenated sequences are terminated by any tpdu that | |
1465 | * carries data: CR, CC, DT, XPD, DR. | |
1466 | * All other tpdu types may be concatenated: AK, XAK, DC, ER. | |
1467 | */ | |
1468 | ||
1469 | separate: | |
1470 | if ( takes_data == 0 ) { | |
1471 | ASSERT( m != MNULL ); | |
1472 | /* | |
1473 | * we already peeled off the prev. tp header so | |
1474 | * we can just pull up some more and repeat | |
1475 | */ | |
1476 | ||
a50e2bc0 | 1477 | if( m = tp_inputprep(m) ) { |
b7fb0758 KS |
1478 | IFDEBUG(D_TPINPUT) |
1479 | hdr = mtod(m, struct tpdu *); | |
1480 | printf("tp_input @ separate: hdr 0x%x size %d m 0x%x\n", | |
1481 | hdr, (int) hdr->tpdu_li + 1, m); | |
1482 | dump_mbuf(m, "tp_input after driver, at separate"); | |
1483 | ENDDEBUG | |
1484 | ||
b7fb0758 KS |
1485 | IncStat(ts_concat_rcvd); |
1486 | goto again; | |
1487 | } | |
1488 | } | |
1489 | if ( m != MNULL ) { | |
1490 | IFDEBUG(D_TPINPUT) | |
1491 | printf("tp_input : m_freem(0x%x)\n", m); | |
1492 | ENDDEBUG | |
1493 | m_freem(m); | |
1494 | IFDEBUG(D_TPINPUT) | |
1495 | printf("tp_input : after m_freem 0x%x\n", m); | |
1496 | ENDDEBUG | |
1497 | } | |
1498 | return (ProtoHook) tpcb; | |
1499 | ||
1500 | discard: | |
1501 | /* class 4: drop the tpdu */ | |
1502 | /* class 2,0: Should drop the net connection, if you can figure out | |
1503 | * to which connection it applies | |
1504 | */ | |
1505 | IFDEBUG(D_TPINPUT) | |
1506 | printf("tp_input DISCARD\n"); | |
1507 | ENDDEBUG | |
1508 | IFTRACE(D_TPINPUT) | |
1509 | tptrace(TPPTmisc, "tp_input DISCARD m", m,0,0,0); | |
1510 | ENDTRACE | |
1511 | m_freem(m); | |
1512 | IncStat(ts_recv_drop); | |
1513 | return (ProtoHook)0; | |
1514 | ||
facaece3 KS |
1515 | nonx_dref: |
1516 | switch (dutype) { | |
1517 | default: | |
1518 | goto discard; | |
1519 | case CC_TPDU_type: | |
1520 | /* error = E_TP_MISM_REFS; */ | |
1521 | break; | |
1522 | case DR_TPDU_type: | |
1523 | error |= TP_ERROR_SNDC; | |
1524 | } | |
b7fb0758 | 1525 | respond: |
c2bb180a | 1526 | IFDEBUG(D_TPINPUT) |
facaece3 | 1527 | printf("RESPOND: error 0x%x, errlen 0x%x\n", error, errlen); |
b7fb0758 KS |
1528 | ENDDEBUG |
1529 | IFTRACE(D_TPINPUT) | |
facaece3 | 1530 | tptrace(TPPTmisc, "tp_input RESPOND m error sref", m, error, sref, 0); |
b7fb0758 | 1531 | ENDTRACE |
facaece3 | 1532 | if (sref == 0) |
b7fb0758 | 1533 | goto discard; |
a50e2bc0 | 1534 | (void) tp_error_emit(error, (u_long)sref, (struct sockaddr_iso *)faddr, |
facaece3 | 1535 | (struct sockaddr_iso *)laddr, m, errlen, tpcb, |
01acbfa1 | 1536 | cons_channel, dgout_routine); |
b7fb0758 KS |
1537 | IFDEBUG(D_ERROR_EMIT) |
1538 | printf("tp_input after error_emit\n"); | |
1539 | ENDDEBUG | |
1540 | ||
1541 | #ifdef lint | |
1542 | printf("",sref,opt); | |
4d8170e5 | 1543 | #endif /* lint */ |
b7fb0758 KS |
1544 | IncStat(ts_recv_drop); |
1545 | return (ProtoHook)0; | |
1546 | } | |
1547 | ||
1548 | ||
1549 | /* | |
1550 | * NAME: tp_headersize() | |
1551 | * | |
1552 | * CALLED FROM: | |
1553 | * tp_emit() and tp_sbsend() | |
1554 | * TP needs to know the header size so it can figure out how | |
1555 | * much data to put in each tpdu. | |
1556 | * | |
1557 | * FUNCTION, ARGUMENTS, and RETURN VALUE: | |
1558 | * For a given connection, represented by (tpcb), and | |
1559 | * tpdu type (dutype), return the size of a tp header. | |
1560 | * | |
1561 | * RETURNS: the expected size of the heade in bytesr | |
1562 | * | |
1563 | * SIDE EFFECTS: | |
1564 | * | |
1565 | * NOTES: It would be nice if it got the network header size as well. | |
1566 | */ | |
1567 | int | |
1568 | tp_headersize(dutype, tpcb) | |
1569 | int dutype; | |
1570 | struct tp_pcb *tpcb; | |
1571 | { | |
1572 | register int size = 0; | |
1573 | ||
1574 | IFTRACE(D_CONN) | |
1575 | tptrace(TPPTmisc, "tp_headersize dutype class xtd_format", | |
1576 | dutype, tpcb->tp_class, tpcb->tp_xtd_format, 0); | |
1577 | ENDTRACE | |
1578 | if( !( (tpcb->tp_class == TP_CLASS_0) || | |
1579 | (tpcb->tp_class == TP_CLASS_4) || | |
1580 | (dutype == DR_TPDU_type) || | |
1581 | (dutype == CR_TPDU_type) )) { | |
1582 | printf("tp_headersize:dutype 0x%x, class 0x%x", | |
1583 | dutype, tpcb->tp_class); | |
1584 | /* TODO: identify this and GET RID OF IT */ | |
1585 | } | |
1586 | ASSERT( (tpcb->tp_class == TP_CLASS_0) || | |
1587 | (tpcb->tp_class == TP_CLASS_4) || | |
1588 | (dutype == DR_TPDU_type) || | |
1589 | (dutype == CR_TPDU_type) ); | |
1590 | ||
1591 | if( tpcb->tp_class == TP_CLASS_0 ) { | |
1592 | size = tpdu_info[ dutype ] [TP_LEN_CLASS_0_INDEX]; | |
1593 | } else { | |
1594 | size = tpdu_info[ dutype ] [tpcb->tp_xtd_format]; | |
1595 | } | |
1596 | return size; | |
1597 | /* caller must get network level header size separately */ | |
1598 | } |