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b7fb0758 KS |
1 | /*********************************************************** |
2 | Copyright IBM Corporation 1987 | |
3 | ||
4 | All Rights Reserved | |
5 | ||
6 | Permission to use, copy, modify, and distribute this software and its | |
7 | documentation for any purpose and without fee is hereby granted, | |
8 | provided that the above copyright notice appear in all copies and that | |
9 | both that copyright notice and this permission notice appear in | |
10 | supporting documentation, and that the name of IBM not be | |
11 | used in advertising or publicity pertaining to distribution of the | |
12 | software without specific, written prior permission. | |
13 | ||
14 | IBM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING | |
15 | ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL | |
16 | IBM BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR | |
17 | ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, | |
18 | WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, | |
19 | ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS | |
20 | SOFTWARE. | |
21 | ||
22 | ******************************************************************/ | |
23 | ||
24 | /* | |
25 | * ARGO Project, Computer Sciences Dept., University of Wisconsin - Madison | |
26 | */ | |
27 | /* | |
28 | * ARGO TP | |
29 | * | |
30 | * $Header: tp_input.c,v 5.6 88/11/18 17:27:38 nhall Exp $ | |
31 | * $Source: /usr/argo/sys/netiso/RCS/tp_input.c,v $ | |
a0df93bc | 32 | * @(#)tp_input.c 7.8 (Berkeley) %G% * |
b7fb0758 KS |
33 | * |
34 | * tp_input() gets an mbuf chain from ip. Actually, not directly | |
35 | * from ip, because ip calls a net-level routine that strips off | |
36 | * the net header and then calls tp_input(), passing the proper type | |
37 | * of addresses for the address family in use (how it figures out | |
38 | * which AF is not yet determined. | |
39 | * | |
40 | * Decomposing the tpdu is some of the most laughable code. The variable-length | |
41 | * parameters and the problem of non-aligned memory references | |
42 | * necessitates such abominations as the macros WHILE_OPTIONS (q.v. below) | |
43 | * to loop through the header and decompose it. | |
44 | * | |
45 | * The routine tp_newsocket() is called when a CR comes in for a listening | |
46 | * socket. tp_input calls sonewconn() and tp_newsocket() to set up the | |
47 | * "child" socket. Most tpcb values are copied from the parent tpcb into | |
48 | * the child. | |
49 | * | |
50 | * Also in here is tp_headersize() (grot) which tells the expected size | |
51 | * of a tp header, to be used by other layers. It's in here because it | |
52 | * uses the static structure tpdu_info. | |
53 | */ | |
54 | ||
55 | #ifndef lint | |
56 | static char *rcsid = "$Header: tp_input.c,v 5.6 88/11/18 17:27:38 nhall Exp $"; | |
57 | #endif lint | |
58 | ||
59 | #include "argoxtwentyfive.h" | |
60 | #include "param.h" | |
61 | #include "mbuf.h" | |
62 | #include "socket.h" | |
63 | #include "socketvar.h" | |
64 | #include "domain.h" | |
65 | #include "protosw.h" | |
66 | #include "errno.h" | |
67 | #include "time.h" | |
68 | #include "kernel.h" | |
69 | #include "types.h" | |
a50e2bc0 KS |
70 | #include "iso_errno.h" |
71 | #include "tp_param.h" | |
72 | #include "tp_timer.h" | |
73 | #include "tp_stat.h" | |
74 | #include "tp_pcb.h" | |
75 | #include "argo_debug.h" | |
76 | #include "tp_trace.h" | |
77 | #include "tp_tpdu.h" | |
78 | #include "iso.h" | |
79 | #include "cons.h" | |
b7fb0758 KS |
80 | |
81 | int iso_check_csum(), tp_driver(), tp_headersize(), tp_error_emit(); | |
82 | ||
a50e2bc0 KS |
83 | /* |
84 | #ifdef lint | |
85 | #undef ATTR | |
86 | #define ATTR(X)ev_number | |
87 | #endif lint | |
88 | */ | |
b7fb0758 KS |
89 | |
90 | struct mbuf * | |
91 | tp_inputprep(m) | |
a50e2bc0 | 92 | register struct mbuf *m; |
b7fb0758 | 93 | { |
a50e2bc0 | 94 | int hdrlen; |
b7fb0758 KS |
95 | |
96 | IFDEBUG(D_TPINPUT) | |
a50e2bc0 | 97 | printf("tp_inputprep: m 0x%x\n", m) ; |
b7fb0758 KS |
98 | ENDDEBUG |
99 | ||
100 | while( m->m_len < 1 ) { | |
101 | if( (m = m_free(m)) == MNULL ) { | |
102 | return (struct mbuf *)0; | |
103 | } | |
104 | } | |
a50e2bc0 KS |
105 | if(((int)m->m_data) & 0x3) { |
106 | /* If we are not 4-byte aligned, we have to be | |
107 | * above the beginning of the mbuf, and it is ok just | |
108 | * to slide it back. | |
109 | */ | |
110 | caddr_t ocp = m->m_data; | |
b7fb0758 | 111 | |
a50e2bc0 KS |
112 | m->m_data = (caddr_t)(((int)m->m_data) & ~0x3); |
113 | ovbcopy(ocp, m->m_data, (unsigned)m->m_len); | |
b7fb0758 KS |
114 | } |
115 | CHANGE_MTYPE(m, TPMT_DATA); | |
116 | ||
a50e2bc0 KS |
117 | /* we KNOW that there is at least 1 byte in this mbuf |
118 | and that it is hdr->tpdu_li XXXXXXX! */ | |
b7fb0758 | 119 | |
a50e2bc0 | 120 | hdrlen = 1 + *mtod( m, u_char *); |
b7fb0758 KS |
121 | |
122 | /* | |
123 | * now pull up the whole tp header | |
124 | */ | |
a50e2bc0 KS |
125 | if ( m->m_len < hdrlen) { |
126 | if ((m = m_pullup(m, hdrlen)) == MNULL ) { | |
b7fb0758 KS |
127 | IncStat(ts_recv_drop); |
128 | return (struct mbuf *)0; | |
129 | } | |
130 | } | |
131 | IFDEBUG(D_INPUT) | |
132 | printf( | |
133 | " at end: m 0x%x hdr->tpdu_li 0x%x m_len 0x%x\n",m, | |
a50e2bc0 | 134 | hdrlen, m->m_len); |
b7fb0758 KS |
135 | ENDDEBUG |
136 | return m; | |
137 | } | |
138 | ||
139 | /* begin groan | |
140 | * -- this array and the following macros allow you to step through the | |
141 | * parameters of the variable part of a header | |
142 | * note that if for any reason the values of the **_TPDU macros (in tp_events.h) | |
143 | * should change, this array has to be rearranged | |
144 | */ | |
145 | ||
146 | #define TP_LEN_CLASS_0_INDEX 2 | |
147 | #define TP_MAX_DATA_INDEX 3 | |
148 | ||
149 | static u_char tpdu_info[][4] = | |
150 | { | |
151 | /* length max data len */ | |
152 | /* reg fmt xtd fmt class 0 */ | |
153 | /* UNUSED 0x0 */ 0x0 , 0x0, 0x0, 0x0, | |
154 | /* XPD_TPDU_type 0x1 */ 0x5, 0x8, 0x0, TP_MAX_XPD_DATA, | |
155 | /* XAK_TPDU_type 0x2 */ 0x5 , 0x8, 0x0, 0x0, | |
156 | /* GR_TPDU_type 0x3 */ 0x0 , 0x0, 0x0, 0x0, | |
157 | /* UNUSED 0x4 */ 0x0 , 0x0, 0x0, 0x0, | |
158 | /* UNUSED 0x5 */ 0x0 , 0x0, 0x0, 0x0, | |
159 | /* AK_TPDU_type 0x6 */ 0x5, 0xa, 0x0, 0x0, | |
160 | /* ER_TPDU_type 0x7 */ 0x5, 0x5, 0x0, 0x0, | |
161 | /* DR_TPDU_type 0x8 */ 0x7, 0x7, 0x7, TP_MAX_DR_DATA, | |
162 | /* UNUSED 0x9 */ 0x0 , 0x0, 0x0, 0x0, | |
163 | /* UNUSED 0xa */ 0x0 , 0x0, 0x0, 0x0, | |
164 | /* UNUSED 0xb */ 0x0 , 0x0, 0x0, 0x0, | |
165 | /* DC_TPDU_type 0xc */ 0x6, 0x6, 0x0, 0x0, | |
166 | /* CC_TPDU_type 0xd */ 0x7, 0x7, 0x7, TP_MAX_CC_DATA, | |
167 | /* CR_TPDU_type 0xe */ 0x7, 0x7, 0x7, TP_MAX_CR_DATA, | |
168 | /* DT_TPDU_type 0xf */ 0x5, 0x8, 0x3, 0x0, | |
169 | }; | |
170 | ||
171 | /* | |
172 | * WHENEVER YOU USE THE FOLLOWING MACRO, | |
173 | * BE SURE THE TPDUTYPE IS A LEGIT VALUE FIRST! | |
174 | */ | |
175 | ||
176 | #define WHILE_OPTIONS(P, hdr,format)\ | |
177 | { register caddr_t P;\ | |
178 | P = (caddr_t)(hdr) +\ | |
179 | tpdu_info[(hdr)->tpdu_type][(format)];\ | |
180 | while( P < (caddr_t)(hdr) + (int)((hdr)->tpdu_li) ) { | |
181 | ||
182 | #define END_WHILE_OPTIONS(P)\ | |
183 | P = P + 2 + (int)((struct tp_vbp *)P)->tpv_len ;\ | |
184 | } } | |
185 | ||
186 | #define CHECK(Phrase, Erval, Stat, Whattodo, Loc)\ | |
187 | if(Phrase) { error = (Erval); errloc = (caddr_t)(Loc); IncStat(Stat); \ | |
188 | goto Whattodo; } | |
189 | ||
190 | /* end groan */ | |
191 | ||
192 | /* | |
193 | * NAME: tp_newsocket() | |
194 | * | |
195 | * CALLED FROM: | |
196 | * tp_input() on incoming CR, when a socket w/ the called suffix | |
197 | * is awaiting a connection request | |
198 | * | |
199 | * FUNCTION and ARGUMENTS: | |
200 | * Create a new socket structure, attach to it a new transport pcb, | |
201 | * using a copy of the net level pcb for the parent socket. | |
202 | * (so) is the parent socket. | |
203 | * (fname) is the foreign address (all that's used is the nsap portion) | |
204 | * | |
205 | * RETURN VALUE: | |
206 | * a new socket structure, being this end of the newly formed connection. | |
207 | * | |
208 | * SIDE EFFECTS: | |
209 | * Sets a few things in the tpcb and net level pcb | |
210 | * | |
211 | * NOTES: | |
212 | */ | |
213 | static struct socket * | |
214 | tp_newsocket(so, fname, cons_channel, class_to_use, netservice) | |
215 | struct socket *so; | |
216 | struct sockaddr *fname; | |
217 | u_int cons_channel; | |
218 | u_char class_to_use; | |
219 | u_int netservice; | |
220 | { | |
221 | register struct tp_pcb *tpcb = sototpcb(so); /* old tpcb, needed below */ | |
222 | struct tp_pcb * newtpcb; | |
b7fb0758 KS |
223 | |
224 | /* | |
225 | * sonewconn() gets a new socket structure, | |
226 | * a new lower layer pcb and a new tpcb, | |
227 | * but the pcbs are unnamed (not bound) | |
228 | */ | |
229 | IFTRACE(D_NEWSOCK) | |
44f52ea5 | 230 | tptraceTPCB(TPPTmisc, "newsock: listg_so, _tpcb, so_head", |
7b25382f | 231 | so, tpcb, so->so_head, 0); |
b7fb0758 KS |
232 | ENDTRACE |
233 | ||
bb2bb663 | 234 | if ((so = sonewconn(so, SS_ISCONFIRMING)) == (struct socket *)0) |
b7fb0758 KS |
235 | return so; |
236 | IFTRACE(D_NEWSOCK) | |
44f52ea5 KS |
237 | tptraceTPCB(TPPTmisc, "newsock: after newconn so, so_head", |
238 | so, so->so_head, 0, 0); | |
b7fb0758 KS |
239 | ENDTRACE |
240 | ||
b7fb0758 | 241 | IFDEBUG(D_NEWSOCK) |
a50e2bc0 KS |
242 | printf("tp_newsocket(channel 0x%x) after sonewconn so 0x%x \n", |
243 | cons_channel, so); | |
244 | dump_addr(fname); | |
b7fb0758 KS |
245 | { |
246 | struct socket *t, *head ; | |
247 | ||
248 | head = so->so_head; | |
249 | t = so; | |
250 | printf("so 0x%x so_head 0x%x so_q0 0x%x, q0len %d\n", | |
251 | t, t->so_head, t->so_q0, t->so_q0len); | |
252 | while( (t=t->so_q0) && t!= so && t!= head) | |
253 | printf("so 0x%x so_head 0x%x so_q0 0x%x, q0len %d\n", | |
254 | t, t->so_head, t->so_q0, t->so_q0len); | |
255 | } | |
256 | ENDDEBUG | |
257 | ||
258 | /* | |
259 | * before we clobber the old tpcb ptr, get these items from the parent pcb | |
260 | */ | |
261 | newtpcb = sototpcb(so); | |
262 | newtpcb->_tp_param = tpcb->_tp_param; | |
263 | newtpcb->tp_flags = tpcb->tp_flags; | |
264 | newtpcb->tp_lcredit = tpcb->tp_lcredit; | |
265 | newtpcb->tp_l_tpdusize = tpcb->tp_l_tpdusize; | |
266 | newtpcb->tp_lsuffixlen = tpcb->tp_lsuffixlen; | |
267 | bcopy( tpcb->tp_lsuffix, newtpcb->tp_lsuffix, newtpcb->tp_lsuffixlen); | |
a50e2bc0 | 268 | soreserve(so, (u_long)tpcb->tp_winsize, (u_long)tpcb->tp_winsize); |
b7fb0758 | 269 | |
a50e2bc0 | 270 | if( /* old */ tpcb->tp_ucddata) { |
b7fb0758 | 271 | /* |
a50e2bc0 | 272 | * These data are the connect- , confirm- or disconnect- data. |
b7fb0758 KS |
273 | */ |
274 | struct mbuf *conndata; | |
275 | ||
a50e2bc0 | 276 | conndata = m_copy(tpcb->tp_ucddata, 0, (int)M_COPYALL); |
b7fb0758 KS |
277 | IFDEBUG(D_CONN) |
278 | dump_mbuf(conndata, "conndata after mcopy"); | |
b7fb0758 | 279 | ENDDEBUG |
a50e2bc0 | 280 | newtpcb->tp_ucddata = conndata; |
b7fb0758 KS |
281 | } |
282 | ||
283 | tpcb = newtpcb; | |
284 | tpcb->tp_state = TP_LISTENING; | |
285 | tpcb->tp_class = class_to_use; | |
286 | tpcb->tp_netservice = netservice; | |
287 | ||
288 | ||
289 | ASSERT( fname != 0 ) ; /* just checking */ | |
290 | if ( fname ) { | |
291 | /* | |
292 | * tp_route_to takes its address argument in the form of an mbuf. | |
293 | */ | |
294 | struct mbuf *m; | |
295 | int err; | |
296 | ||
297 | MGET(m, M_DONTWAIT, MT_SONAME); /* mbuf type used is confusing */ | |
298 | if (m) { | |
299 | /* | |
300 | * this seems a bit grotesque, but tp_route_to expects | |
301 | * an mbuf * instead of simply a sockaddr; it calls the ll | |
302 | * pcb_connect, which expects the name/addr in an mbuf as well. | |
303 | * sigh. | |
304 | */ | |
a50e2bc0 KS |
305 | bcopy((caddr_t)fname, mtod(m, caddr_t), fname->sa_len); |
306 | m->m_len = fname->sa_len; | |
b7fb0758 KS |
307 | |
308 | /* grot : have to say the kernel can override params in | |
309 | * the passive open case | |
310 | */ | |
311 | tpcb->tp_dont_change_params = 0; | |
312 | err = tp_route_to( m, tpcb, cons_channel); | |
313 | m_free(m); | |
314 | ||
315 | if (!err) | |
316 | goto ok; | |
317 | } | |
318 | IFDEBUG(D_CONN) | |
319 | printf("tp_route_to FAILED! detaching tpcb 0x%x, so 0x%x\n", | |
320 | tpcb, so); | |
321 | ENDDEBUG | |
322 | (void) tp_detach(tpcb); | |
323 | return 0; | |
324 | } | |
325 | ok: | |
326 | IFDEBUG(D_TPINPUT) | |
327 | printf("tp_newsocket returning so 0x%x, sototpcb(so) 0x%x\n", | |
328 | so, sototpcb(so)); | |
329 | ENDDEBUG | |
330 | return so; | |
331 | } | |
332 | ||
333 | #ifndef CONS | |
334 | tpcons_output() | |
335 | { | |
336 | return(0); | |
337 | } | |
338 | #endif !CONS | |
339 | ||
340 | /* | |
341 | * NAME: tp_input() | |
342 | * | |
343 | * CALLED FROM: | |
344 | * net layer input routine | |
345 | * | |
346 | * FUNCTION and ARGUMENTS: | |
347 | * Process an incoming TPDU (m), finding the associated tpcb if there | |
348 | * is one. Create the appropriate type of event and call the driver. | |
349 | * (faddr) and (laddr) are the foreign and local addresses. | |
350 | * | |
351 | * When tp_input() is called we KNOW that the ENTIRE TP HEADER | |
352 | * has been m_pullup-ed. | |
353 | * | |
354 | * RETURN VALUE: Nada | |
355 | * | |
356 | * SIDE EFFECTS: | |
357 | * When using COSNS it may affect the state of the net-level pcb | |
358 | * | |
359 | * NOTE: | |
360 | * The initial value of acktime is 2 so that we will never | |
361 | * have a 0 value for tp_peer_acktime. It gets used in the | |
362 | * computation of the retransmission timer value, and so it | |
363 | * mustn't be zero. | |
364 | * 2 seems like a reasonable minimum. | |
365 | */ | |
366 | ProtoHook | |
20650f15 | 367 | tp_input(m, faddr, laddr, cons_channel, dgout_routine, ce_bit) |
b7fb0758 KS |
368 | register struct mbuf *m; |
369 | struct sockaddr *faddr, *laddr; /* NSAP addresses */ | |
370 | u_int cons_channel; | |
371 | int (*dgout_routine)(); | |
20650f15 | 372 | int ce_bit; |
b7fb0758 KS |
373 | |
374 | { | |
375 | register struct tp_pcb *tpcb = (struct tp_pcb *)0; | |
376 | register struct tpdu *hdr = mtod(m, struct tpdu *); | |
377 | struct socket *so; | |
378 | struct tp_event e; | |
44f52ea5 | 379 | int error; |
b7fb0758 KS |
380 | unsigned dutype; |
381 | u_short dref, sref, acktime, subseq; /*VAX*/ | |
44f52ea5 | 382 | u_char preferred_class, class_to_use; |
b7fb0758 KS |
383 | u_char opt, dusize, addlopt; |
384 | #ifdef TP_PERF_MEAS | |
44f52ea5 | 385 | u_char perf_meas; |
b7fb0758 KS |
386 | #endif TP_PERF_MEAS |
387 | u_char fsufxlen; | |
388 | u_char lsufxlen; | |
44f52ea5 | 389 | caddr_t fsufxloc, lsufxloc; |
b7fb0758 KS |
390 | int tpdu_len; |
391 | u_int takes_data; | |
392 | u_int fcc_present; | |
44f52ea5 | 393 | caddr_t errloc; |
b7fb0758 KS |
394 | struct tp_conn_param tpp; |
395 | int tpcons_output(); | |
396 | ||
44f52ea5 | 397 | again: |
b7fb0758 | 398 | #ifdef TP_PERF_MEAS |
44f52ea5 | 399 | GET_CUR_TIME( &e.e_time ); perf_meas = 0; |
b7fb0758 KS |
400 | #endif TP_PERF_MEAS |
401 | ||
402 | IFDEBUG(D_TPINPUT) | |
403 | printf("tp_input(0x%x, ... 0x%x)\n", m, cons_channel); | |
404 | ENDDEBUG | |
405 | ||
b7fb0758 KS |
406 | |
407 | tpdu_len = 0; | |
408 | tpcb = (struct tp_pcb *)0; | |
44f52ea5 KS |
409 | fsufxlen = 0; fsufxloc = 0; |
410 | lsufxlen = 0; lsufxloc = 0; | |
411 | errloc = 0; error = 0; | |
b7fb0758 KS |
412 | addlopt = 0; |
413 | acktime = 2; | |
414 | dusize = TP_DFL_TPDUSIZE; | |
415 | sref = 0; | |
416 | subseq = 0; | |
417 | takes_data = FALSE; | |
418 | fcc_present = FALSE; | |
44f52ea5 | 419 | preferred_class = 0; class_to_use = 0; |
b7fb0758 KS |
420 | |
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 | ||
499 | #ifdef notdef /* This is done up above */ | |
500 | sref = hdr->tpdu_CRsref; | |
501 | #endif notdef | |
a50e2bc0 | 502 | preferred_class = 1 << hdr->tpdu_CRclass; |
b7fb0758 KS |
503 | opt = hdr->tpdu_CRoptions; |
504 | ||
505 | WHILE_OPTIONS(P, hdr, 1 ) /* { */ | |
506 | ||
507 | switch( vbptr(P)->tpv_code ) { | |
508 | ||
509 | case TPP_tpdu_size: | |
510 | vb_getval(P, u_char, dusize); | |
511 | IFDEBUG(D_TPINPUT) | |
512 | printf("CR dusize 0x%x\n", dusize); | |
513 | ENDDEBUG | |
514 | CHECK( (dusize < TP_MIN_TPDUSIZE || dusize > TP_MAX_TPDUSIZE), | |
515 | E_TP_INV_PVAL, ts_inv_pval, respond, | |
516 | (1 + (caddr_t)&vbptr(P)->tpv_val - P) ) | |
517 | break; | |
518 | case TPP_addl_opt: | |
519 | vb_getval(P, u_char, addlopt); | |
520 | break; | |
521 | case TPP_calling_sufx: | |
522 | /* could use vb_getval, but we want to save the loc & len | |
523 | * for later use | |
524 | */ | |
525 | fsufxloc = (caddr_t) &vbptr(P)->tpv_val; | |
526 | fsufxlen = vbptr(P)->tpv_len; | |
527 | IFDEBUG(D_TPINPUT) | |
528 | printf("CR fsufx:"); | |
529 | { register int j; | |
530 | for(j=0; j<fsufxlen; j++ ) { | |
531 | printf(" 0x%x. ", *((caddr_t)(fsufxloc+j)) ); | |
532 | } | |
533 | printf("\n"); | |
534 | } | |
535 | ENDDEBUG | |
536 | break; | |
537 | case TPP_called_sufx: | |
538 | /* could use vb_getval, but we want to save the loc & len | |
539 | * for later use | |
540 | */ | |
541 | lsufxloc = (caddr_t) &vbptr(P)->tpv_val; | |
542 | lsufxlen = vbptr(P)->tpv_len; | |
543 | IFDEBUG(D_TPINPUT) | |
544 | printf("CR lsufx:"); | |
545 | { register int j; | |
546 | for(j=0; j<lsufxlen; j++ ) { | |
a50e2bc0 | 547 | printf(" 0x%x. ", *((u_char *)(lsufxloc+j)) ); |
b7fb0758 KS |
548 | } |
549 | printf("\n"); | |
550 | } | |
551 | ENDDEBUG | |
552 | break; | |
553 | ||
554 | #ifdef TP_PERF_MEAS | |
555 | case TPP_perf_meas: | |
556 | vb_getval(P, u_char, perf_meas); | |
557 | break; | |
558 | #endif TP_PERF_MEAS | |
559 | ||
560 | case TPP_vers: | |
561 | /* not in class 0; 1 octet; in CR_TPDU only */ | |
562 | CHECK( (vbval(P, u_char) != TP_VERSION ), | |
563 | E_TP_INV_PVAL, ts_inv_pval, respond, | |
564 | (1 + (caddr_t)&vbptr(P)->tpv_val - P) ) | |
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; | |
581 | ||
582 | for (i = ((struct tp_vbp *)P)->tpv_len; i>0; i--) { | |
583 | aclass = | |
584 | (u_char *) &(((struct tp_vbp *)P)->tpv_val); | |
a50e2bc0 | 585 | alt_classes |= (1<<((*aclass)>>4)); |
b7fb0758 KS |
586 | } |
587 | IFDEBUG(D_TPINPUT) | |
588 | printf("alt_classes 0x%x\n", alt_classes); | |
589 | ENDDEBUG | |
590 | } | |
591 | break; | |
592 | ||
593 | case TPP_security: | |
594 | case TPP_residER: | |
595 | case TPP_priority: | |
596 | case TPP_transdelay: | |
597 | case TPP_throughput: | |
598 | case TPP_addl_info: | |
599 | case TPP_subseq: | |
600 | IFDEBUG(D_TPINPUT) | |
601 | printf("param ignored CR_TPDU code= 0x%x\n", | |
602 | vbptr(P)->tpv_code); | |
603 | ENDDEBUG | |
604 | IncStat(ts_param_ignored); | |
605 | break; | |
606 | ||
607 | case TPP_checksum: | |
608 | IFDEBUG(D_TPINPUT) | |
609 | printf("CR before cksum\n"); | |
610 | ENDDEBUG | |
611 | ||
612 | CHECK( iso_check_csum(m, tpdu_len), | |
613 | E_TP_INV_PVAL, ts_bad_csum, discard, 0) | |
614 | ||
615 | IFDEBUG(D_TPINPUT) | |
616 | printf("CR before cksum\n"); | |
617 | ENDDEBUG | |
618 | break; | |
619 | ||
620 | default: | |
621 | IncStat(ts_inv_pcode); | |
622 | error = E_TP_INV_PCODE; | |
623 | goto discard; | |
624 | ||
625 | } | |
626 | ||
627 | /* } */ END_WHILE_OPTIONS(P) | |
628 | ||
629 | if( lsufxlen == 0) { | |
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 { | |
635 | register struct tp_ref *rp; | |
636 | register int r; | |
637 | extern int tp_maxrefopen; | |
638 | ||
639 | rp = &tp_ref[1]; /* zero-th one is never open */ | |
640 | for( r=1 ; (r <= tp_maxrefopen) ; r++,rp++ ) { | |
641 | if (rp->tpr_state!=REF_OPENING) | |
642 | continue; | |
643 | if ( bcmp(lsufxloc, rp->tpr_pcb->tp_lsuffix, lsufxlen)==0 ) { | |
644 | tpcb = rp->tpr_pcb; | |
645 | if( laddr->sa_family != | |
646 | tpcb->tp_sock->so_proto->pr_domain->dom_family ) { | |
647 | IFDEBUG(D_CONN) | |
648 | printf( | |
649 | "MISMATCHED AF on CR! laddr.family 0x%x expected 0x%x\n", | |
650 | laddr->sa_family, | |
651 | tpcb->tp_sock->so_proto->pr_domain->dom_family ); | |
652 | ENDDEBUG | |
653 | continue; | |
654 | } | |
655 | IFTRACE(D_TPINPUT) | |
656 | tptrace(TPPTmisc, "tp_input: ref *lsufxloc refstate", | |
657 | r, *lsufxloc, rp->tpr_state, 0); | |
658 | ENDTRACE | |
659 | /* found it */ | |
660 | break; | |
661 | } | |
662 | } | |
663 | ||
664 | CHECK( (r > tp_maxrefopen), E_TP_NO_SESSION, ts_inv_sufx, respond, | |
665 | (1 + 2 + (caddr_t)&hdr->_tpduf - (caddr_t)hdr)) | |
666 | /* _tpduf is the fixed part; add 2 to get the dref bits of | |
667 | * the fixed part (can't take the address of a bit field) | |
668 | */ | |
669 | } | |
670 | ||
671 | /* | |
672 | * WE HAVE A TPCB | |
673 | * already know that the classes in the CR match at least | |
674 | * one class implemented, but we don't know yet if they | |
675 | * include any classes permitted by this server. | |
676 | */ | |
677 | ||
678 | IFDEBUG(D_TPINPUT) | |
679 | printf("HAVE A TPCB 1: 0x%x\n", tpcb); | |
680 | ENDDEBUG | |
681 | IFDEBUG(D_CONN) | |
682 | printf( | |
683 | "CR: bef CHKS: flags 0x%x class_to_use 0x%x alt 0x%x opt 0x%x tp_class 0x%x\n", | |
684 | tpcb->tp_flags, class_to_use, alt_classes, opt, tpcb->tp_class); | |
685 | ENDDEBUG | |
686 | /* tpcb->tp_class doesn't include any classes not implemented */ | |
687 | class_to_use = (preferred_class & tpcb->tp_class); | |
688 | if( (class_to_use = preferred_class & tpcb->tp_class) == 0 ) | |
689 | class_to_use = alt_classes & tpcb->tp_class; | |
690 | ||
691 | class_to_use = 1 << tp_mask_to_num(class_to_use); | |
692 | ||
693 | { | |
694 | tpp = tpcb->_tp_param; | |
695 | tpp.p_class = class_to_use; | |
696 | tpp.p_tpdusize = dusize; | |
697 | tpp.p_xtd_format = (opt & TPO_XTD_FMT) == TPO_XTD_FMT; | |
698 | tpp.p_xpd_service = (addlopt & TPAO_USE_TXPD) == TPAO_USE_TXPD; | |
699 | tpp.p_use_checksum = (tpp.p_class == TP_CLASS_0)?0: | |
700 | (addlopt & TPAO_NO_CSUM) == 0; | |
701 | #ifdef notdef | |
702 | tpp.p_use_efc = (opt & TPO_USE_EFC) == TPO_USE_EFC; | |
703 | tpp.p_use_nxpd = (addlopt & TPAO_USE_NXPD) == TPAO_USE_NXPD; | |
704 | tpp.p_use_rcc = (addlopt & TPAO_USE_RCC) == TPAO_USE_RCC; | |
705 | #endif notdef | |
706 | ||
707 | CHECK( | |
708 | tp_consistency(tpcb, 0 /* not force or strict */, &tpp) != 0, | |
709 | E_TP_NEGOT_FAILED, ts_negotfailed, respond, | |
710 | (1 + 2 + (caddr_t)&hdr->_tpdufr.CRCC - (caddr_t)hdr) | |
711 | /* ^ more or less the location of class */ | |
712 | ) | |
713 | } | |
714 | IFTRACE(D_CONN) | |
715 | tptrace(TPPTmisc, | |
716 | "after 1 consist class_to_use class, out, tpconsout", | |
717 | class_to_use, | |
718 | tpcb->tp_class, dgout_routine, tpcons_output | |
719 | ); | |
720 | ENDTRACE | |
721 | CHECK( | |
722 | ((class_to_use == TP_CLASS_0)&&(dgout_routine != tpcons_output)), | |
723 | E_TP_NEGOT_FAILED, ts_negotfailed, respond, | |
724 | (1 + 2 + (caddr_t)&hdr->_tpdufr.CRCC - (caddr_t)hdr) | |
725 | /* ^ more or less the location of class */ | |
726 | ) | |
727 | IFDEBUG(D_CONN) | |
728 | printf("CR: after CRCCCHECKS: tpcb 0x%x, flags 0x%x\n", | |
729 | tpcb, tpcb->tp_flags); | |
730 | ENDDEBUG | |
731 | takes_data = TRUE; | |
732 | e.ATTR(CR_TPDU).e_cdt = hdr->tpdu_CRcdt; | |
733 | e.ev_number = CR_TPDU; | |
734 | ||
735 | so = tpcb->tp_sock; | |
736 | if (so->so_options & SO_ACCEPTCONN) { | |
737 | /* | |
738 | * Create a socket, tpcb, ll pcb, etc. | |
739 | * for this newborn connection, and fill in all the values. | |
740 | */ | |
741 | IFDEBUG(D_CONN) | |
742 | printf("abt to call tp_newsocket(0x%x, 0x%x, 0x%x, 0x%x)\n", | |
743 | so, laddr, faddr, cons_channel); | |
744 | ENDDEBUG | |
745 | if( (so = | |
746 | tp_newsocket(so, faddr, cons_channel, | |
747 | class_to_use, | |
a50e2bc0 KS |
748 | ((tpcb->tp_netservice == IN_CLNS) ? IN_CLNS : |
749 | (dgout_routine == tpcons_output)?ISO_CONS:ISO_CLNS)) | |
b7fb0758 KS |
750 | ) == (struct socket *)0 ) { |
751 | /* note - even if netservice is IN_CLNS, as far as | |
752 | * the tp entity is concerned, the only differences | |
a50e2bc0 | 753 | * are CO vs CL |
b7fb0758 KS |
754 | */ |
755 | IFDEBUG(D_CONN) | |
756 | printf("tp_newsocket returns 0\n"); | |
757 | ENDDEBUG | |
758 | goto discard; | |
759 | } | |
760 | tpcb = sototpcb(so); | |
761 | ||
b7fb0758 | 762 | /* |
a50e2bc0 | 763 | * Stash the addresses in the net level pcb |
b7fb0758 KS |
764 | * kind of like a pcbconnect() but don't need |
765 | * or want all those checks. | |
766 | */ | |
767 | (tpcb->tp_nlproto->nlp_putnetaddr)(so->so_pcb, faddr, TP_FOREIGN); | |
768 | (tpcb->tp_nlproto->nlp_putnetaddr)(so->so_pcb, laddr, TP_LOCAL); | |
769 | ||
a50e2bc0 KS |
770 | /* stash the f suffix in the new tpcb */ |
771 | /* l suffix is already there */ | |
a50e2bc0 | 772 | bcopy(fsufxloc, tpcb->tp_fsuffix, fsufxlen); |
44f52ea5 | 773 | |
a50e2bc0 KS |
774 | (tpcb->tp_nlproto->nlp_putsufx) |
775 | (so->so_pcb, fsufxloc, fsufxlen, TP_FOREIGN); | |
44f52ea5 KS |
776 | (tpcb->tp_nlproto->nlp_putsufx) |
777 | (so->so_pcb, lsufxloc, lsufxlen, TP_LOCAL); | |
b7fb0758 KS |
778 | |
779 | #ifdef TP_PERF_MEAS | |
780 | if( tpcb->tp_perf_on = perf_meas ) { /* assignment */ | |
781 | /* ok, let's create an mbuf for stashing the | |
782 | * statistics if one doesn't already exist | |
783 | */ | |
784 | (void) tp_setup_perf(tpcb); | |
785 | } | |
786 | #endif TP_PERF_MEAS | |
787 | tpcb->tp_fref = sref; | |
788 | ||
789 | /* We've already checked for consistency with the options | |
790 | * set in tpp, but we couldn't set them earlier because | |
791 | * we didn't want to change options in the LISTENING tpcb. | |
792 | * Now we set the options in the new socket's tpcb. | |
793 | */ | |
794 | (void) tp_consistency( tpcb, TP_FORCE, &tpp); | |
795 | ||
796 | if(!tpcb->tp_use_checksum) | |
797 | IncStat(ts_csum_off); | |
798 | if(tpcb->tp_xpd_service) | |
799 | IncStat(ts_use_txpd); | |
800 | if(tpcb->tp_xtd_format) | |
801 | IncStat(ts_xtd_fmt); | |
802 | ||
803 | /* | |
804 | * Get the maximum transmission unit from the lower layer(s) | |
805 | * so we can negotiate a reasonable max TPDU size. | |
806 | */ | |
807 | (tpcb->tp_nlproto->nlp_mtu)(so, so->so_pcb, | |
808 | &tpcb->tp_l_tpdusize, &tpcb->tp_tpdusize, 0); | |
809 | tpcb->tp_peer_acktime = acktime; | |
810 | ||
811 | /* | |
812 | * The following kludge is used to test retransmissions and | |
813 | * timeout during connection establishment. | |
814 | */ | |
815 | IFDEBUG(D_ZDREF) | |
816 | IncStat(ts_zdebug); | |
a50e2bc0 | 817 | /*tpcb->tp_fref = 0;*/ |
b7fb0758 KS |
818 | ENDDEBUG |
819 | } | |
820 | IncStat(ts_CR_rcvd); | |
20650f15 KS |
821 | if (!tpcb->tp_cebit_off) { |
822 | tpcb->tp_win_recv = tp_start_win << 8; | |
823 | tpcb->tp_cong_sample.cs_size = 0; | |
824 | LOCAL_CREDIT(tpcb); | |
825 | CONG_INIT_SAMPLE(tpcb); | |
826 | CONG_UPDATE_SAMPLE(tpcb, ce_bit); | |
827 | } | |
828 | tpcb->tp_ackrcvd = 0; | |
b7fb0758 KS |
829 | } else if ( dutype == ER_TPDU_type ) { |
830 | /* | |
831 | * ER TPDUs have to be recognized separately | |
832 | * because they don't necessarily have a tpcb | |
833 | * with them and we don't want err out looking for such | |
834 | * a beast. | |
835 | * We could put a bunch of little kludges in the | |
836 | * next section of code so it would avoid references to tpcb | |
837 | * if dutype == ER_TPDU_type but we don't want code for ERs to | |
838 | * mess up code for data transfer. | |
839 | */ | |
840 | IncStat(ts_ER_rcvd); | |
841 | e.ev_number = ER_TPDU; | |
842 | e.ATTR(ER_TPDU).e_reason = (u_char)hdr->tpdu_ERreason; | |
843 | takes_data = 1; | |
844 | } else { | |
845 | /* tpdu type is CC, XPD, XAK, GR, AK, DR, DC, or DT */ | |
846 | ||
847 | /* In the next 4 checks, | |
848 | * _tpduf is the fixed part; add 2 to get the dref bits of | |
849 | * the fixed part (can't take the address of a bit field) | |
850 | */ | |
851 | if(cons_channel) { | |
852 | #if NARGOXTWENTYFIVE > 0 | |
853 | extern struct tp_pcb *cons_chan_to_tpcb(); | |
854 | ||
855 | tpcb = cons_chan_to_tpcb( cons_channel ); | |
856 | /* Problem: We may have a legit | |
857 | * error situation yet we may or may not have | |
858 | * a correspondence between the tpcb and the vc, | |
859 | * e.g., TP4cr--> <no dice, respond w/ DR on vc> | |
860 | * <--- DR | |
861 | * Now it's up to TP to look at the tpdu and do one of: | |
862 | * confirm(dgm)(cr), confirm(circuit)(cr), reject(cr), or | |
863 | * nothing, if the circuit is already open (any other tpdu). | |
864 | * Sigh. | |
865 | */ | |
866 | ||
867 | /* I don't know about this error value */ | |
868 | CHECK( (tpcb == (struct tp_pcb *)0) , | |
869 | E_TP_NO_CR_ON_NC, ts_inv_dref, respond, | |
870 | (1 + 2 + (caddr_t)&hdr->_tpduf - (caddr_t)hdr)) | |
871 | #else | |
872 | printf("tp_input(): X25 NOT CONFIGURED!!\n"); | |
873 | #endif NARGOXTWENTYFIVE > 0 | |
874 | ||
875 | } else { | |
876 | ||
877 | CHECK( ((int)dref <= 0 || dref >= N_TPREF) , | |
878 | E_TP_MISM_REFS,ts_inv_dref, respond, | |
879 | (1 + 2 + (caddr_t)&hdr->_tpduf - (caddr_t)hdr)) | |
880 | CHECK( ((tpcb = tp_ref[dref].tpr_pcb ) == (struct tp_pcb *) 0 ), | |
881 | E_TP_MISM_REFS,ts_inv_dref, respond, | |
882 | (1 + 2 + (caddr_t)&hdr->_tpduf - (caddr_t)hdr)) | |
883 | CHECK( (tpcb->tp_refp->tpr_state == REF_FREE), | |
884 | E_TP_MISM_REFS,ts_inv_dref, respond, | |
885 | (1 + 2 + (caddr_t)&hdr->_tpduf - (caddr_t)hdr)) | |
886 | } | |
887 | ||
888 | IFDEBUG(D_TPINPUT) | |
889 | printf("HAVE A TPCB 2: 0x%x\n", tpcb); | |
890 | ENDDEBUG | |
891 | ||
892 | /* causes a DR to be sent for CC; ER for all else */ | |
893 | CHECK( (tpcb->tp_refp->tpr_state == REF_FROZEN), | |
894 | (dutype == CC_TPDU_type?E_TP_NO_SESSION:E_TP_MISM_REFS), | |
895 | ts_inv_dref, respond, | |
896 | (1 + 2 + (caddr_t)&hdr->_tpduf - (caddr_t)hdr)) | |
897 | ||
898 | IFDEBUG(D_TPINPUT) | |
899 | printf("state of dref %d ok, tpcb 0x%x\n", dref,tpcb); | |
900 | ENDDEBUG | |
901 | /* | |
902 | * At this point the state of the dref could be | |
903 | * FROZEN: tpr_pcb == NULL, has ( reference only) timers | |
904 | * for example, DC may arrive after the close() has detached | |
905 | * the tpcb (e.g., if user turned off SO_LISTEN option) | |
906 | * OPENING : a tpcb exists but no timers yet | |
907 | * OPEN : tpcb exists & timers are outstanding | |
908 | */ | |
909 | ||
20650f15 KS |
910 | if (!tpcb->tp_cebit_off) |
911 | CONG_UPDATE_SAMPLE(tpcb, ce_bit); | |
912 | ||
b7fb0758 KS |
913 | dusize = tpcb->tp_tpdusize; |
914 | ||
915 | dutype = hdr->tpdu_type << 8; /* for the switch below */ | |
916 | ||
917 | WHILE_OPTIONS(P, hdr, tpcb->tp_xtd_format) /* { */ | |
918 | ||
a50e2bc0 | 919 | #define caseof(x,y) case (((x)<<8)+(y)) |
b7fb0758 KS |
920 | switch( dutype | vbptr(P)->tpv_code ) { |
921 | ||
922 | caseof( CC_TPDU_type, TPP_addl_opt ): | |
923 | /* not in class 0; 1 octet */ | |
924 | vb_getval(P, u_char, addlopt); | |
925 | break; | |
926 | caseof( CC_TPDU_type, TPP_tpdu_size ): | |
927 | vb_getval(P, u_char, dusize); | |
928 | CHECK( (dusize < TP_MIN_TPDUSIZE || dusize > | |
929 | TP_MAX_TPDUSIZE), E_TP_INV_PVAL, ts_inv_pval, respond, | |
930 | (1 + (caddr_t)&vbptr(P)->tpv_val - P) ) | |
931 | IFDEBUG(D_TPINPUT) | |
932 | printf("CC dusize 0x%x\n", dusize); | |
933 | ENDDEBUG | |
934 | break; | |
935 | caseof( CC_TPDU_type, TPP_calling_sufx): | |
936 | IFDEBUG(D_TPINPUT) | |
937 | printf("CC calling (local) sufxlen 0x%x\n", lsufxlen); | |
938 | ENDDEBUG | |
939 | lsufxloc = (caddr_t) &vbptr(P)->tpv_val; | |
940 | lsufxlen = vbptr(P)->tpv_len; | |
941 | break; | |
942 | caseof( CC_TPDU_type, TPP_acktime ): | |
943 | /* class 4 only, 2 octets */ | |
944 | vb_getval(P, u_short, acktime); | |
945 | acktime = acktime/500; /* convert to slowtimo ticks */ | |
946 | if( (short)acktime <=0 ) | |
947 | acktime = 2; | |
948 | break; | |
949 | caseof( CC_TPDU_type, TPP_called_sufx): | |
950 | fsufxloc = (caddr_t) &vbptr(P)->tpv_val; | |
951 | fsufxlen = vbptr(P)->tpv_len; | |
952 | IFDEBUG(D_TPINPUT) | |
953 | printf("CC called (foreign) sufx len %d\n", fsufxlen); | |
954 | ENDDEBUG | |
955 | break; | |
956 | ||
957 | caseof( CC_TPDU_type, TPP_checksum): | |
958 | caseof( DR_TPDU_type, TPP_checksum): | |
959 | caseof( DT_TPDU_type, TPP_checksum): | |
960 | caseof( XPD_TPDU_type, TPP_checksum): | |
961 | if( tpcb->tp_use_checksum ) { | |
962 | CHECK( iso_check_csum(m, tpdu_len), | |
963 | E_TP_INV_PVAL, ts_bad_csum, discard, 0) | |
964 | } | |
965 | break; | |
966 | ||
967 | /* this is different from the above because in the context | |
968 | * of concat/ sep tpdu_len might not be the same as hdr len | |
969 | */ | |
970 | caseof( AK_TPDU_type, TPP_checksum): | |
971 | caseof( XAK_TPDU_type, TPP_checksum): | |
972 | caseof( DC_TPDU_type, TPP_checksum): | |
973 | if( tpcb->tp_use_checksum ) { | |
a50e2bc0 | 974 | CHECK( iso_check_csum(m, (int)hdr->tpdu_li + 1), |
b7fb0758 KS |
975 | E_TP_INV_PVAL, ts_bad_csum, discard, 0) |
976 | } | |
977 | break; | |
978 | #ifdef notdef | |
979 | caseof( DR_TPDU_type, TPP_addl_info ): | |
980 | /* ignore - its length and meaning are | |
981 | * user defined and there's no way | |
982 | * to pass this info to the user anyway | |
983 | */ | |
984 | break; | |
985 | #endif notdef | |
986 | ||
987 | caseof( AK_TPDU_type, TPP_subseq ): | |
988 | /* used after reduction of window */ | |
989 | vb_getval(P, u_short, subseq); | |
990 | subseq = ntohs(subseq); | |
991 | IFDEBUG(D_ACKRECV) | |
992 | printf("AK Subsequence # 0x%x\n", subseq); | |
993 | ENDDEBUG | |
994 | break; | |
995 | ||
996 | caseof( AK_TPDU_type, TPP_flow_cntl_conf ): | |
997 | { | |
998 | u_int ylwe; | |
999 | u_short ysubseq, ycredit; | |
1000 | ||
1001 | fcc_present = TRUE; | |
1002 | vb_getval(P, u_int, ylwe); | |
1003 | vb_getval(P, u_short, ysubseq); | |
1004 | vb_getval(P, u_short, ycredit); | |
1005 | ylwe = ntohl(ylwe); | |
1006 | ysubseq = ntohs(ysubseq); | |
1007 | ycredit = ntohs(ycredit); | |
1008 | IFDEBUG(D_ACKRECV) | |
1009 | printf("AK FCC lwe 0x%x, subseq 0x%x, cdt 0x%x\n", | |
1010 | ylwe, ysubseq, ycredit); | |
1011 | ENDDEBUG | |
1012 | } | |
1013 | break; | |
1014 | ||
1015 | default: | |
1016 | IFDEBUG(D_TPINPUT) | |
1017 | printf("param ignored dutype 0x%x, code 0x%x\n", | |
1018 | dutype, vbptr(P)->tpv_code); | |
1019 | ENDDEBUG | |
1020 | IFTRACE(D_TPINPUT) | |
1021 | tptrace(TPPTmisc, "param ignored dutype code ", | |
1022 | dutype, vbptr(P)->tpv_code ,0,0); | |
1023 | ENDTRACE | |
1024 | IncStat(ts_param_ignored); | |
1025 | break; | |
1026 | #undef caseof | |
1027 | } | |
1028 | /* } */ END_WHILE_OPTIONS(P) | |
1029 | ||
1030 | /* NOTE: the variable dutype has been shifted left! */ | |
1031 | ||
1032 | switch( hdr->tpdu_type ) { | |
1033 | case CC_TPDU_type: | |
1034 | /* If CC comes back with an unacceptable class | |
1035 | * respond with a DR or ER | |
1036 | */ | |
1037 | ||
1038 | opt = hdr->tpdu_CCoptions; /* 1 byte */ | |
1039 | ||
1040 | { | |
1041 | tpp = tpcb->_tp_param; | |
1042 | tpp.p_class = (1<<hdr->tpdu_CCclass); | |
1043 | tpp.p_tpdusize = dusize; | |
1044 | tpp.p_dont_change_params = 0; | |
1045 | tpp.p_xtd_format = (opt & TPO_XTD_FMT) == TPO_XTD_FMT; | |
1046 | tpp.p_xpd_service = (addlopt & TPAO_USE_TXPD) == TPAO_USE_TXPD; | |
1047 | tpp.p_use_checksum = (addlopt & TPAO_NO_CSUM) == 0; | |
1048 | #ifdef notdef | |
1049 | tpp.p_use_efc = (opt & TPO_USE_EFC) == TPO_USE_EFC; | |
1050 | tpp.p_use_nxpd = (addlopt & TPAO_USE_NXPD) == TPAO_USE_NXPD; | |
1051 | tpp.p_use_rcc = (addlopt & TPAO_USE_RCC) == TPAO_USE_RCC; | |
1052 | #endif notdef | |
1053 | ||
1054 | CHECK( | |
1055 | tp_consistency(tpcb, TP_FORCE, &tpp) != 0, | |
1056 | E_TP_NEGOT_FAILED, ts_negotfailed, respond, | |
1057 | (1 + 2 + (caddr_t)&hdr->_tpdufr.CRCC - (caddr_t)hdr) | |
1058 | /* ^ more or less the location of class */ | |
1059 | ) | |
1060 | IFTRACE(D_CONN) | |
1061 | tptrace(TPPTmisc, | |
1062 | "after 1 consist class, out, tpconsout", | |
1063 | tpcb->tp_class, dgout_routine, tpcons_output, 0 | |
1064 | ); | |
1065 | ENDTRACE | |
1066 | CHECK( | |
1067 | ((class_to_use == TP_CLASS_0)&& | |
1068 | (dgout_routine != tpcons_output)), | |
1069 | E_TP_NEGOT_FAILED, ts_negotfailed, respond, | |
1070 | (1 + 2 + (caddr_t)&hdr->_tpdufr.CRCC - (caddr_t)hdr) | |
1071 | /* ^ more or less the location of class */ | |
1072 | ) | |
1073 | } | |
1074 | if( ! tpcb->tp_use_checksum) | |
1075 | IncStat(ts_csum_off); | |
1076 | if(tpcb->tp_xpd_service) | |
1077 | IncStat(ts_use_txpd); | |
1078 | if(tpcb->tp_xtd_format) | |
1079 | IncStat(ts_xtd_fmt); | |
1080 | ||
1081 | IFTRACE(D_CONN) | |
1082 | tptrace(TPPTmisc, "after CC class flags dusize CCclass", | |
1083 | tpcb->tp_class, tpcb->tp_flags, tpcb->tp_tpdusize, | |
1084 | hdr->tpdu_CCclass); | |
1085 | ENDTRACE | |
1086 | ||
1087 | /* | |
1088 | * Get the maximum transmission unit from the lower layer(s) | |
1089 | * so we can decide how large a TPDU size to negotiate. | |
1090 | * It would be nice if the arguments to this | |
1091 | * were more reasonable. | |
1092 | */ | |
1093 | (tpcb->tp_nlproto->nlp_mtu)(tpcb->tp_sock, tpcb->tp_sock->so_pcb, | |
1094 | &tpcb->tp_l_tpdusize, &tpcb->tp_tpdusize, 0); | |
1095 | ||
1096 | #ifdef CONS | |
1097 | /* Could be that this CC came in on a NEW vc, in which case | |
1098 | * we have to confirm it. | |
1099 | */ | |
1100 | if( cons_channel ) | |
1101 | cons_netcmd( CONN_CONFIRM, tpcb->tp_npcb, cons_channel, | |
1102 | tpcb->tp_class == TP_CLASS_4); | |
1103 | #endif CONS | |
1104 | ||
1105 | tpcb->tp_peer_acktime = acktime; | |
1106 | ||
1107 | /* if called or calling suffices appeared on the CC, | |
1108 | * they'd better jive with what's in the pcb | |
1109 | */ | |
1110 | if( fsufxlen ) { | |
1111 | CHECK( ((tpcb->tp_fsuffixlen != fsufxlen) || | |
1112 | bcmp(fsufxloc, tpcb->tp_fsuffix, fsufxlen)), | |
1113 | E_TP_INV_PVAL,ts_inv_sufx, respond, | |
1114 | (1+fsufxloc - (caddr_t)hdr)) | |
1115 | } | |
1116 | if( lsufxlen ) { | |
1117 | CHECK( ((tpcb->tp_lsuffixlen != lsufxlen) || | |
1118 | bcmp(lsufxloc, tpcb->tp_lsuffix, lsufxlen)), | |
1119 | E_TP_INV_PVAL,ts_inv_sufx, respond, | |
1120 | (1+lsufxloc - (caddr_t)hdr)) | |
1121 | } | |
1122 | ||
1123 | #ifdef notdef | |
1124 | e.ATTR(CC_TPDU).e_sref = (u_short)hdr->tpdu_CCsref; | |
1125 | #else | |
1126 | e.ATTR(CC_TPDU).e_sref = sref; | |
1127 | #endif notdef | |
1128 | e.ATTR(CC_TPDU).e_cdt = hdr->tpdu_CCcdt; | |
1129 | takes_data = TRUE; | |
1130 | e.ev_number = CC_TPDU; | |
1131 | IncStat(ts_CC_rcvd); | |
1132 | break; | |
1133 | ||
1134 | case DC_TPDU_type: | |
1135 | #ifdef notdef | |
1136 | if (hdr->tpdu_DCsref != tpcb->tp_fref) | |
1137 | printf("INPUT: inv sufx DCsref 0x%x, tp_fref 0x%x\n", | |
1138 | hdr->tpdu_DCsref, tpcb->tp_fref); | |
1139 | #else | |
1140 | if (sref != tpcb->tp_fref) | |
1141 | printf("INPUT: inv sufx DCsref 0x%x, tp_fref 0x%x\n", | |
1142 | sref, tpcb->tp_fref); | |
1143 | #endif notdef | |
1144 | ||
1145 | #ifdef notdef | |
1146 | CHECK( (hdr->tpdu_DCsref != tpcb->tp_fref), | |
1147 | E_TP_MISM_REFS, ts_inv_sufx, respond, | |
1148 | (1 + (caddr_t)&hdr->tpdu_DCsref - (caddr_t)hdr)) | |
1149 | #else | |
1150 | CHECK( (sref != tpcb->tp_fref), | |
1151 | E_TP_MISM_REFS, ts_inv_sufx, respond, | |
1152 | (1 + (caddr_t)&hdr->tpdu_DCsref - (caddr_t)hdr)) | |
1153 | #endif notdef | |
1154 | e.ev_number = DC_TPDU; | |
1155 | IncStat(ts_DC_rcvd); | |
1156 | break; | |
1157 | ||
1158 | case DR_TPDU_type: | |
1159 | IFTRACE(D_TPINPUT) | |
1160 | tptrace(TPPTmisc, "DR recvd", hdr->tpdu_DRreason, 0, 0, 0); | |
1161 | ENDTRACE | |
1162 | #ifdef vax | |
1163 | if(sref != tpcb->tp_fref) | |
1164 | printf("INPUT: inv sufx DRsref 0x%x tp_fref 0x%x\n", | |
1165 | sref, tpcb->tp_fref); | |
1166 | ||
1167 | CHECK( (sref != tpcb->tp_fref), | |
1168 | E_TP_MISM_REFS,ts_inv_sufx, respond, | |
1169 | (1 + (caddr_t)&hdr->tpdu_DRsref - (caddr_t)hdr)) | |
1170 | ||
1171 | e.ATTR(DR_TPDU).e_reason = hdr->tpdu_DRreason; | |
1172 | e.ATTR(DR_TPDU).e_sref = (u_short)sref; | |
1173 | #else | |
1174 | if(hdr->tpdu_DRsref != tpcb->tp_fref) | |
1175 | printf("INPUT: inv sufx DRsref 0x%x tp_fref 0x%x\n", | |
1176 | hdr->tpdu_DRsref, tpcb->tp_fref); | |
1177 | ||
1178 | CHECK( (hdr->tpdu_DRsref != tpcb->tp_fref), | |
1179 | E_TP_MISM_REFS,ts_inv_sufx, respond, | |
1180 | (1 + (caddr_t)&hdr->tpdu_DRsref - (caddr_t)hdr)) | |
1181 | ||
1182 | e.ATTR(DR_TPDU).e_reason = | |
1183 | hdr->tpdu_DRreason; | |
1184 | e.ATTR(DR_TPDU).e_sref = (u_short)hdr->tpdu_DRsref; | |
1185 | #endif vax | |
1186 | takes_data = TRUE; | |
1187 | e.ev_number = DR_TPDU; | |
1188 | IncStat(ts_DR_rcvd); | |
1189 | break; | |
1190 | ||
1191 | case ER_TPDU_type: | |
1192 | IFTRACE(D_TPINPUT) | |
1193 | tptrace(TPPTmisc, "ER recvd", hdr->tpdu_ERreason,0,0,0); | |
1194 | ENDTRACE | |
1195 | e.ev_number = ER_TPDU; | |
1196 | e.ATTR(ER_TPDU).e_reason = hdr->tpdu_ERreason; | |
1197 | IncStat(ts_ER_rcvd); | |
1198 | break; | |
1199 | ||
1200 | case AK_TPDU_type: | |
1201 | ||
1202 | e.ATTR(AK_TPDU).e_subseq = subseq; | |
1203 | e.ATTR(AK_TPDU).e_fcc_present = fcc_present; | |
1204 | ||
1205 | if (tpcb->tp_xtd_format) { | |
1206 | #ifdef BYTE_ORDER | |
1207 | union seq_type seqeotX; | |
1208 | ||
1209 | seqeotX.s_seqeot = ntohl(hdr->tpdu_seqeotX); | |
1210 | e.ATTR(AK_TPDU).e_seq = seqeotX.s_seq; | |
1211 | e.ATTR(AK_TPDU).e_cdt = ntohs(hdr->tpdu_AKcdtX); | |
1212 | #else | |
1213 | e.ATTR(AK_TPDU).e_cdt = hdr->tpdu_AKcdtX; | |
1214 | e.ATTR(AK_TPDU).e_seq = hdr->tpdu_AKseqX; | |
1215 | #endif BYTE_ORDER | |
1216 | } else { | |
1217 | e.ATTR(AK_TPDU).e_cdt = hdr->tpdu_AKcdt; | |
1218 | e.ATTR(AK_TPDU).e_seq = hdr->tpdu_AKseq; | |
1219 | } | |
1220 | IFTRACE(D_TPINPUT) | |
1221 | tptrace(TPPTmisc, "AK recvd seq cdt subseq fcc_pres", | |
1222 | e.ATTR(AK_TPDU).e_seq, e.ATTR(AK_TPDU).e_cdt, | |
1223 | subseq, fcc_present); | |
1224 | ENDTRACE | |
1225 | ||
1226 | e.ev_number = AK_TPDU; | |
1227 | IncStat(ts_AK_rcvd); | |
1228 | IncPStat(tpcb, tps_AK_rcvd); | |
1229 | break; | |
1230 | ||
1231 | case XAK_TPDU_type: | |
1232 | if (tpcb->tp_xtd_format) { | |
1233 | #ifdef BYTE_ORDER | |
1234 | union seq_type seqeotX; | |
1235 | ||
1236 | seqeotX.s_seqeot = ntohl(hdr->tpdu_seqeotX); | |
1237 | e.ATTR(XAK_TPDU).e_seq = seqeotX.s_seq; | |
1238 | #else | |
1239 | e.ATTR(XAK_TPDU).e_seq = hdr->tpdu_XAKseqX; | |
1240 | #endif BYTE_ORDER | |
1241 | } else { | |
1242 | e.ATTR(XAK_TPDU).e_seq = hdr->tpdu_XAKseq; | |
1243 | } | |
1244 | e.ev_number = XAK_TPDU; | |
1245 | IncStat(ts_XAK_rcvd); | |
1246 | IncPStat(tpcb, tps_XAK_rcvd); | |
1247 | break; | |
1248 | ||
1249 | case XPD_TPDU_type: | |
1250 | if (tpcb->tp_xtd_format) { | |
1251 | #ifdef BYTE_ORDER | |
1252 | union seq_type seqeotX; | |
1253 | ||
1254 | seqeotX.s_seqeot = ntohl(hdr->tpdu_seqeotX); | |
1255 | e.ATTR(XPD_TPDU).e_seq = seqeotX.s_seq; | |
1256 | #else | |
1257 | e.ATTR(XPD_TPDU).e_seq = hdr->tpdu_XPDseqX; | |
1258 | #endif BYTE_ORDER | |
1259 | } else { | |
1260 | e.ATTR(XPD_TPDU).e_seq = hdr->tpdu_XPDseq; | |
1261 | } | |
1262 | takes_data = TRUE; | |
1263 | e.ev_number = XPD_TPDU; | |
1264 | IncStat(ts_XPD_rcvd); | |
1265 | IncPStat(tpcb, tps_XPD_rcvd); | |
1266 | break; | |
1267 | ||
1268 | case DT_TPDU_type: | |
1269 | { /* the y option will cause occasional packets to be dropped. | |
1270 | * A little crude but it works. | |
1271 | */ | |
1272 | ||
1273 | IFDEBUG(D_DROP) | |
1274 | if(time.tv_usec & 0x4 && hdr->tpdu_DTseq & 0x1) { | |
1275 | IncStat(ts_ydebug); | |
1276 | goto discard; | |
1277 | } | |
1278 | ENDDEBUG | |
1279 | } | |
1280 | if (tpcb->tp_class == TP_CLASS_0) { | |
1281 | e.ATTR(DT_TPDU).e_seq = 0; /* actually don't care */ | |
1282 | e.ATTR(DT_TPDU).e_eot = (((struct tp0du *)hdr)->tp0du_eot); | |
1283 | } else if (tpcb->tp_xtd_format) { | |
1284 | #ifdef BYTE_ORDER | |
1285 | union seq_type seqeotX; | |
1286 | ||
1287 | seqeotX.s_seqeot = ntohl(hdr->tpdu_seqeotX); | |
1288 | e.ATTR(DT_TPDU).e_seq = seqeotX.s_seq; | |
1289 | e.ATTR(DT_TPDU).e_eot = seqeotX.s_eot; | |
1290 | #else | |
1291 | e.ATTR(DT_TPDU).e_seq = hdr->tpdu_DTseqX; | |
1292 | e.ATTR(DT_TPDU).e_eot = hdr->tpdu_DTeotX; | |
1293 | #endif BYTE_ORDER | |
1294 | } else { | |
1295 | e.ATTR(DT_TPDU).e_seq = hdr->tpdu_DTseq; | |
1296 | e.ATTR(DT_TPDU).e_eot = hdr->tpdu_DTeot; | |
1297 | } | |
1298 | if(e.ATTR(DT_TPDU).e_eot) | |
1299 | IncStat(ts_eot_input); | |
1300 | takes_data = TRUE; | |
1301 | e.ev_number = DT_TPDU; | |
1302 | IncStat(ts_DT_rcvd); | |
1303 | IncPStat(tpcb, tps_DT_rcvd); | |
1304 | break; | |
1305 | ||
1306 | case GR_TPDU_type: | |
1307 | tp_indicate(T_DISCONNECT, tpcb, ECONNABORTED); | |
1308 | /* drop through */ | |
1309 | default: | |
1310 | /* this should NEVER happen because there is a | |
1311 | * check for dutype well above here | |
1312 | */ | |
1313 | error = E_TP_INV_TPDU; /* causes an ER */ | |
1314 | IFDEBUG(D_TPINPUT) | |
1315 | printf("INVALID dutype 0x%x\n", hdr->tpdu_type); | |
1316 | ENDDEBUG | |
1317 | IncStat(ts_inv_dutype); | |
1318 | goto respond; | |
1319 | } | |
1320 | } | |
1321 | ||
1322 | /* peel off the tp header; | |
1323 | * remember that the du_li doesn't count itself. | |
1324 | * This may leave us w/ an empty mbuf at the front of a chain. | |
1325 | * We can't just throw away the empty mbuf because hdr still points | |
1326 | * into the mbuf's data area and we're still using hdr (the tpdu header) | |
1327 | */ | |
1328 | m->m_len -= ((int)hdr->tpdu_li + 1); | |
a50e2bc0 | 1329 | m->m_data += ((int)hdr->tpdu_li + 1); |
b7fb0758 | 1330 | |
a50e2bc0 KS |
1331 | if (takes_data) { |
1332 | int max = tpdu_info[ hdr->tpdu_type ] [TP_MAX_DATA_INDEX]; | |
1333 | int datalen = tpdu_len - hdr->tpdu_li - 1, mbtype = MT_DATA; | |
a0df93bc | 1334 | struct cmsghdr c_hdr; |
a50e2bc0 | 1335 | struct mbuf *n; |
b7fb0758 | 1336 | |
a50e2bc0 KS |
1337 | CHECK( (max && datalen > max), E_TP_LENGTH_INVAL, |
1338 | ts_inv_length, respond, (max + hdr->tpdu_li + 1) ); | |
b7fb0758 | 1339 | switch( hdr->tpdu_type ) { |
a50e2bc0 | 1340 | |
b7fb0758 | 1341 | case CR_TPDU_type: |
a50e2bc0 KS |
1342 | c_hdr.cmsg_type = TPOPT_CONN_DATA; |
1343 | goto make_control_msg; | |
1344 | ||
b7fb0758 | 1345 | case CC_TPDU_type: |
a50e2bc0 KS |
1346 | c_hdr.cmsg_type = TPOPT_CFRM_DATA; |
1347 | goto make_control_msg; | |
1348 | ||
b7fb0758 | 1349 | case DR_TPDU_type: |
a50e2bc0 KS |
1350 | c_hdr.cmsg_type = TPOPT_DISC_DATA; |
1351 | make_control_msg: | |
1352 | c_hdr.cmsg_level = SOL_TRANSPORT; | |
1353 | mbtype = MT_CONTROL; | |
76d6a813 KS |
1354 | datalen += sizeof(c_hdr); |
1355 | m->m_len += sizeof(c_hdr); | |
1356 | m->m_data -= sizeof(c_hdr); | |
1357 | c_hdr.cmsg_len = datalen; | |
1358 | bcopy((caddr_t)&c_hdr, mtod(m, caddr_t), sizeof(c_hdr)); | |
a50e2bc0 KS |
1359 | /* FALLTHROUGH */ |
1360 | ||
b7fb0758 | 1361 | case XPD_TPDU_type: |
a50e2bc0 KS |
1362 | if (mbtype != MT_CONTROL) |
1363 | mbtype = MT_OOBDATA; | |
1364 | m->m_flags |= M_EOR; | |
1365 | /* FALLTHROUGH */ | |
b7fb0758 | 1366 | |
a50e2bc0 KS |
1367 | case DT_TPDU_type: |
1368 | for (n = m; n; n = n->m_next) { | |
1369 | MCHTYPE(n, mbtype); | |
1370 | } | |
1371 | e.ATTR(DT_TPDU).e_datalen = datalen; | |
b7fb0758 KS |
1372 | e.ATTR(DT_TPDU).e_data = m; |
1373 | break; | |
1374 | ||
1375 | default: | |
1376 | printf( | |
1377 | "ERROR in tp_input! hdr->tpdu_type 0x%x takes_data 0x%x m 0x%x\n", | |
1378 | hdr->tpdu_type, takes_data, m); | |
1379 | break; | |
1380 | } | |
1381 | /* prevent m_freem() after tp_driver() from throwing it all away */ | |
1382 | m = MNULL; | |
1383 | } | |
1384 | ||
1385 | IncStat(ts_tpdu_rcvd); | |
1386 | ||
1387 | IFDEBUG(D_TPINPUT) | |
1388 | printf( "tp_input: before driver, state 0x%x event 0x%x m 0x%x", | |
1389 | tpcb->tp_state, e.ev_number, m ); | |
1390 | printf(" e.e_data 0x%x\n", e.ATTR(DT_TPDU).e_data); | |
1391 | printf("takes_data 0x%x m_len 0x%x, tpdu_len 0x%x\n", | |
1392 | takes_data, (m==MNULL)?0:m->m_len, tpdu_len); | |
1393 | ENDDEBUG | |
1394 | ||
b7fb0758 KS |
1395 | error = tp_driver(tpcb, &e); |
1396 | ||
1397 | ASSERT(tpcb != (struct tp_pcb *)0); | |
1398 | ASSERT(tpcb->tp_sock != (struct socket *)0); | |
1399 | if( tpcb->tp_sock->so_error == 0 ) | |
1400 | tpcb->tp_sock->so_error = error; | |
1401 | ||
1402 | /* Kludge to keep the state tables under control (adding | |
1403 | * data on connect & disconnect & freeing the mbuf containing | |
1404 | * the data would have exploded the tables and made a big mess ). | |
1405 | */ | |
1406 | switch(e.ev_number) { | |
1407 | case CC_TPDU: | |
1408 | case DR_TPDU: | |
1409 | case CR_TPDU: | |
1410 | m = e.ATTR(CC_TPDU).e_data; /* same field for all three dutypes */ | |
1411 | IFDEBUG(D_TPINPUT) | |
1412 | printf("after driver, restoring m to 0x%x, takes_data 0x%x\n", | |
1413 | m, takes_data); | |
1414 | ENDDEBUG | |
1415 | break; | |
1416 | default: | |
1417 | break; | |
1418 | } | |
1419 | /* Concatenated sequences are terminated by any tpdu that | |
1420 | * carries data: CR, CC, DT, XPD, DR. | |
1421 | * All other tpdu types may be concatenated: AK, XAK, DC, ER. | |
1422 | */ | |
1423 | ||
1424 | separate: | |
1425 | if ( takes_data == 0 ) { | |
1426 | ASSERT( m != MNULL ); | |
1427 | /* | |
1428 | * we already peeled off the prev. tp header so | |
1429 | * we can just pull up some more and repeat | |
1430 | */ | |
1431 | ||
a50e2bc0 | 1432 | if( m = tp_inputprep(m) ) { |
b7fb0758 KS |
1433 | IFDEBUG(D_TPINPUT) |
1434 | hdr = mtod(m, struct tpdu *); | |
1435 | printf("tp_input @ separate: hdr 0x%x size %d m 0x%x\n", | |
1436 | hdr, (int) hdr->tpdu_li + 1, m); | |
1437 | dump_mbuf(m, "tp_input after driver, at separate"); | |
1438 | ENDDEBUG | |
1439 | ||
b7fb0758 KS |
1440 | IncStat(ts_concat_rcvd); |
1441 | goto again; | |
1442 | } | |
1443 | } | |
1444 | if ( m != MNULL ) { | |
1445 | IFDEBUG(D_TPINPUT) | |
1446 | printf("tp_input : m_freem(0x%x)\n", m); | |
1447 | ENDDEBUG | |
1448 | m_freem(m); | |
1449 | IFDEBUG(D_TPINPUT) | |
1450 | printf("tp_input : after m_freem 0x%x\n", m); | |
1451 | ENDDEBUG | |
1452 | } | |
1453 | return (ProtoHook) tpcb; | |
1454 | ||
1455 | discard: | |
1456 | /* class 4: drop the tpdu */ | |
1457 | /* class 2,0: Should drop the net connection, if you can figure out | |
1458 | * to which connection it applies | |
1459 | */ | |
1460 | IFDEBUG(D_TPINPUT) | |
1461 | printf("tp_input DISCARD\n"); | |
1462 | ENDDEBUG | |
1463 | IFTRACE(D_TPINPUT) | |
1464 | tptrace(TPPTmisc, "tp_input DISCARD m", m,0,0,0); | |
1465 | ENDTRACE | |
1466 | m_freem(m); | |
1467 | IncStat(ts_recv_drop); | |
1468 | return (ProtoHook)0; | |
1469 | ||
1470 | respond: | |
1471 | IFDEBUG(D_ERROR_EMIT) | |
1472 | printf("RESPOND: error 0x%x, errloc 0x%x\n", error, errloc); | |
1473 | ENDDEBUG | |
1474 | IFTRACE(D_TPINPUT) | |
1475 | tptrace(TPPTmisc, "tp_input RESPOND m error sref", m,error,sref,0); | |
1476 | ENDTRACE | |
1477 | if( sref == 0 ) | |
1478 | goto discard; | |
a50e2bc0 KS |
1479 | (void) tp_error_emit(error, (u_long)sref, (struct sockaddr_iso *)faddr, |
1480 | (struct sockaddr_iso *)laddr, m, (int)errloc, tpcb, | |
1481 | (int)cons_channel, dgout_routine); | |
b7fb0758 KS |
1482 | IFDEBUG(D_ERROR_EMIT) |
1483 | printf("tp_input after error_emit\n"); | |
1484 | ENDDEBUG | |
1485 | ||
1486 | #ifdef lint | |
1487 | printf("",sref,opt); | |
1488 | #endif lint | |
1489 | IncStat(ts_recv_drop); | |
1490 | return (ProtoHook)0; | |
1491 | } | |
1492 | ||
1493 | ||
1494 | /* | |
1495 | * NAME: tp_headersize() | |
1496 | * | |
1497 | * CALLED FROM: | |
1498 | * tp_emit() and tp_sbsend() | |
1499 | * TP needs to know the header size so it can figure out how | |
1500 | * much data to put in each tpdu. | |
1501 | * | |
1502 | * FUNCTION, ARGUMENTS, and RETURN VALUE: | |
1503 | * For a given connection, represented by (tpcb), and | |
1504 | * tpdu type (dutype), return the size of a tp header. | |
1505 | * | |
1506 | * RETURNS: the expected size of the heade in bytesr | |
1507 | * | |
1508 | * SIDE EFFECTS: | |
1509 | * | |
1510 | * NOTES: It would be nice if it got the network header size as well. | |
1511 | */ | |
1512 | int | |
1513 | tp_headersize(dutype, tpcb) | |
1514 | int dutype; | |
1515 | struct tp_pcb *tpcb; | |
1516 | { | |
1517 | register int size = 0; | |
1518 | ||
1519 | IFTRACE(D_CONN) | |
1520 | tptrace(TPPTmisc, "tp_headersize dutype class xtd_format", | |
1521 | dutype, tpcb->tp_class, tpcb->tp_xtd_format, 0); | |
1522 | ENDTRACE | |
1523 | if( !( (tpcb->tp_class == TP_CLASS_0) || | |
1524 | (tpcb->tp_class == TP_CLASS_4) || | |
1525 | (dutype == DR_TPDU_type) || | |
1526 | (dutype == CR_TPDU_type) )) { | |
1527 | printf("tp_headersize:dutype 0x%x, class 0x%x", | |
1528 | dutype, tpcb->tp_class); | |
1529 | /* TODO: identify this and GET RID OF IT */ | |
1530 | } | |
1531 | ASSERT( (tpcb->tp_class == TP_CLASS_0) || | |
1532 | (tpcb->tp_class == TP_CLASS_4) || | |
1533 | (dutype == DR_TPDU_type) || | |
1534 | (dutype == CR_TPDU_type) ); | |
1535 | ||
1536 | if( tpcb->tp_class == TP_CLASS_0 ) { | |
1537 | size = tpdu_info[ dutype ] [TP_LEN_CLASS_0_INDEX]; | |
1538 | } else { | |
1539 | size = tpdu_info[ dutype ] [tpcb->tp_xtd_format]; | |
1540 | } | |
1541 | return size; | |
1542 | /* caller must get network level header size separately */ | |
1543 | } |