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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 $ | |
194a383a | 32 | * @(#)tp_input.c 7.15 (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 | ||
b7fb0758 | 59 | #include "param.h" |
63f88aec | 60 | #include "systm.h" |
b7fb0758 KS |
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" | |
194a383a | 70 | #include "iso.h" |
a50e2bc0 | 71 | #include "iso_errno.h" |
194a383a | 72 | #include "iso_pcb.h" |
a50e2bc0 KS |
73 | #include "tp_param.h" |
74 | #include "tp_timer.h" | |
75 | #include "tp_stat.h" | |
76 | #include "tp_pcb.h" | |
77 | #include "argo_debug.h" | |
78 | #include "tp_trace.h" | |
79 | #include "tp_tpdu.h" | |
194a383a KS |
80 | |
81 | #include "../net/if.h" | |
82 | #ifdef TRUE | |
83 | #undef FALSE | |
84 | #undef TRUE | |
85 | #endif | |
86 | #include "../netccitt/x25.h" | |
87 | #include "../netccitt/pk.h" | |
88 | #include "../netccitt/pk_var.h" | |
b7fb0758 KS |
89 | |
90 | int iso_check_csum(), tp_driver(), tp_headersize(), tp_error_emit(); | |
91 | ||
a50e2bc0 KS |
92 | /* |
93 | #ifdef lint | |
94 | #undef ATTR | |
95 | #define ATTR(X)ev_number | |
96 | #endif lint | |
97 | */ | |
b7fb0758 KS |
98 | |
99 | struct mbuf * | |
100 | tp_inputprep(m) | |
a50e2bc0 | 101 | register struct mbuf *m; |
b7fb0758 | 102 | { |
a50e2bc0 | 103 | int hdrlen; |
b7fb0758 KS |
104 | |
105 | IFDEBUG(D_TPINPUT) | |
a50e2bc0 | 106 | printf("tp_inputprep: m 0x%x\n", m) ; |
b7fb0758 KS |
107 | ENDDEBUG |
108 | ||
109 | while( m->m_len < 1 ) { | |
110 | if( (m = m_free(m)) == MNULL ) { | |
111 | return (struct mbuf *)0; | |
112 | } | |
113 | } | |
a50e2bc0 KS |
114 | if(((int)m->m_data) & 0x3) { |
115 | /* If we are not 4-byte aligned, we have to be | |
116 | * above the beginning of the mbuf, and it is ok just | |
117 | * to slide it back. | |
118 | */ | |
119 | caddr_t ocp = m->m_data; | |
b7fb0758 | 120 | |
a50e2bc0 KS |
121 | m->m_data = (caddr_t)(((int)m->m_data) & ~0x3); |
122 | ovbcopy(ocp, m->m_data, (unsigned)m->m_len); | |
b7fb0758 KS |
123 | } |
124 | CHANGE_MTYPE(m, TPMT_DATA); | |
125 | ||
a50e2bc0 KS |
126 | /* we KNOW that there is at least 1 byte in this mbuf |
127 | and that it is hdr->tpdu_li XXXXXXX! */ | |
b7fb0758 | 128 | |
a50e2bc0 | 129 | hdrlen = 1 + *mtod( m, u_char *); |
b7fb0758 KS |
130 | |
131 | /* | |
132 | * now pull up the whole tp header | |
133 | */ | |
a50e2bc0 KS |
134 | if ( m->m_len < hdrlen) { |
135 | if ((m = m_pullup(m, hdrlen)) == MNULL ) { | |
b7fb0758 KS |
136 | IncStat(ts_recv_drop); |
137 | return (struct mbuf *)0; | |
138 | } | |
139 | } | |
140 | IFDEBUG(D_INPUT) | |
141 | printf( | |
142 | " at end: m 0x%x hdr->tpdu_li 0x%x m_len 0x%x\n",m, | |
a50e2bc0 | 143 | hdrlen, m->m_len); |
b7fb0758 KS |
144 | ENDDEBUG |
145 | return m; | |
146 | } | |
147 | ||
148 | /* begin groan | |
149 | * -- this array and the following macros allow you to step through the | |
150 | * parameters of the variable part of a header | |
151 | * note that if for any reason the values of the **_TPDU macros (in tp_events.h) | |
152 | * should change, this array has to be rearranged | |
153 | */ | |
154 | ||
155 | #define TP_LEN_CLASS_0_INDEX 2 | |
156 | #define TP_MAX_DATA_INDEX 3 | |
157 | ||
158 | static u_char tpdu_info[][4] = | |
159 | { | |
160 | /* length max data len */ | |
161 | /* reg fmt xtd fmt class 0 */ | |
162 | /* UNUSED 0x0 */ 0x0 , 0x0, 0x0, 0x0, | |
163 | /* XPD_TPDU_type 0x1 */ 0x5, 0x8, 0x0, TP_MAX_XPD_DATA, | |
164 | /* XAK_TPDU_type 0x2 */ 0x5 , 0x8, 0x0, 0x0, | |
165 | /* GR_TPDU_type 0x3 */ 0x0 , 0x0, 0x0, 0x0, | |
166 | /* UNUSED 0x4 */ 0x0 , 0x0, 0x0, 0x0, | |
167 | /* UNUSED 0x5 */ 0x0 , 0x0, 0x0, 0x0, | |
168 | /* AK_TPDU_type 0x6 */ 0x5, 0xa, 0x0, 0x0, | |
169 | /* ER_TPDU_type 0x7 */ 0x5, 0x5, 0x0, 0x0, | |
170 | /* DR_TPDU_type 0x8 */ 0x7, 0x7, 0x7, TP_MAX_DR_DATA, | |
171 | /* UNUSED 0x9 */ 0x0 , 0x0, 0x0, 0x0, | |
172 | /* UNUSED 0xa */ 0x0 , 0x0, 0x0, 0x0, | |
173 | /* UNUSED 0xb */ 0x0 , 0x0, 0x0, 0x0, | |
174 | /* DC_TPDU_type 0xc */ 0x6, 0x6, 0x0, 0x0, | |
175 | /* CC_TPDU_type 0xd */ 0x7, 0x7, 0x7, TP_MAX_CC_DATA, | |
176 | /* CR_TPDU_type 0xe */ 0x7, 0x7, 0x7, TP_MAX_CR_DATA, | |
177 | /* DT_TPDU_type 0xf */ 0x5, 0x8, 0x3, 0x0, | |
178 | }; | |
179 | ||
facaece3 | 180 | #define CHECK(Phrase, Erval, Stat, Whattodo, Loc)\ |
c2bb180a | 181 | if (Phrase) {error = (Erval); errlen = (int)(Loc); IncStat(Stat); tpibrk();\ |
facaece3 KS |
182 | goto Whattodo; } |
183 | ||
c2bb180a KS |
184 | tpibrk() {} |
185 | ||
b7fb0758 KS |
186 | /* |
187 | * WHENEVER YOU USE THE FOLLOWING MACRO, | |
188 | * BE SURE THE TPDUTYPE IS A LEGIT VALUE FIRST! | |
189 | */ | |
190 | ||
facaece3 KS |
191 | #define WHILE_OPTIONS(P, hdr, format)\ |
192 | { register caddr_t P = tpdu_info[(hdr)->tpdu_type][(format)] + (caddr_t)hdr;\ | |
193 | caddr_t PLIM = 1 + hdr->tpdu_li + (caddr_t)hdr;\ | |
194 | for (;; P += 2 + ((struct tp_vbp *)P)->tpv_len) {\ | |
195 | CHECK((P > PLIM), E_TP_LENGTH_INVAL, ts_inv_length,\ | |
196 | respond, P - (caddr_t)hdr);\ | |
197 | if (P == PLIM) break; | |
b7fb0758 | 198 | |
facaece3 | 199 | #define END_WHILE_OPTIONS(P) } } |
b7fb0758 KS |
200 | |
201 | /* end groan */ | |
202 | ||
203 | /* | |
204 | * NAME: tp_newsocket() | |
205 | * | |
206 | * CALLED FROM: | |
207 | * tp_input() on incoming CR, when a socket w/ the called suffix | |
208 | * is awaiting a connection request | |
209 | * | |
210 | * FUNCTION and ARGUMENTS: | |
211 | * Create a new socket structure, attach to it a new transport pcb, | |
212 | * using a copy of the net level pcb for the parent socket. | |
213 | * (so) is the parent socket. | |
214 | * (fname) is the foreign address (all that's used is the nsap portion) | |
215 | * | |
216 | * RETURN VALUE: | |
217 | * a new socket structure, being this end of the newly formed connection. | |
218 | * | |
219 | * SIDE EFFECTS: | |
220 | * Sets a few things in the tpcb and net level pcb | |
221 | * | |
222 | * NOTES: | |
223 | */ | |
224 | static struct socket * | |
225 | tp_newsocket(so, fname, cons_channel, class_to_use, netservice) | |
226 | struct socket *so; | |
227 | struct sockaddr *fname; | |
228 | u_int cons_channel; | |
229 | u_char class_to_use; | |
230 | u_int netservice; | |
231 | { | |
232 | register struct tp_pcb *tpcb = sototpcb(so); /* old tpcb, needed below */ | |
194a383a | 233 | register struct tp_pcb *newtpcb; |
b7fb0758 KS |
234 | |
235 | /* | |
236 | * sonewconn() gets a new socket structure, | |
237 | * a new lower layer pcb and a new tpcb, | |
238 | * but the pcbs are unnamed (not bound) | |
239 | */ | |
240 | IFTRACE(D_NEWSOCK) | |
44f52ea5 | 241 | tptraceTPCB(TPPTmisc, "newsock: listg_so, _tpcb, so_head", |
7b25382f | 242 | so, tpcb, so->so_head, 0); |
b7fb0758 KS |
243 | ENDTRACE |
244 | ||
bb2bb663 | 245 | if ((so = sonewconn(so, SS_ISCONFIRMING)) == (struct socket *)0) |
b7fb0758 KS |
246 | return so; |
247 | IFTRACE(D_NEWSOCK) | |
44f52ea5 KS |
248 | tptraceTPCB(TPPTmisc, "newsock: after newconn so, so_head", |
249 | so, so->so_head, 0, 0); | |
b7fb0758 KS |
250 | ENDTRACE |
251 | ||
b7fb0758 | 252 | IFDEBUG(D_NEWSOCK) |
a50e2bc0 KS |
253 | printf("tp_newsocket(channel 0x%x) after sonewconn so 0x%x \n", |
254 | cons_channel, so); | |
255 | dump_addr(fname); | |
b7fb0758 KS |
256 | { |
257 | struct socket *t, *head ; | |
258 | ||
259 | head = so->so_head; | |
260 | t = so; | |
261 | printf("so 0x%x so_head 0x%x so_q0 0x%x, q0len %d\n", | |
262 | t, t->so_head, t->so_q0, t->so_q0len); | |
263 | while( (t=t->so_q0) && t!= so && t!= head) | |
264 | printf("so 0x%x so_head 0x%x so_q0 0x%x, q0len %d\n", | |
265 | t, t->so_head, t->so_q0, t->so_q0len); | |
266 | } | |
267 | ENDDEBUG | |
268 | ||
269 | /* | |
270 | * before we clobber the old tpcb ptr, get these items from the parent pcb | |
271 | */ | |
272 | newtpcb = sototpcb(so); | |
273 | newtpcb->_tp_param = tpcb->_tp_param; | |
274 | newtpcb->tp_flags = tpcb->tp_flags; | |
275 | newtpcb->tp_lcredit = tpcb->tp_lcredit; | |
276 | newtpcb->tp_l_tpdusize = tpcb->tp_l_tpdusize; | |
277 | newtpcb->tp_lsuffixlen = tpcb->tp_lsuffixlen; | |
278 | bcopy( tpcb->tp_lsuffix, newtpcb->tp_lsuffix, newtpcb->tp_lsuffixlen); | |
a50e2bc0 | 279 | soreserve(so, (u_long)tpcb->tp_winsize, (u_long)tpcb->tp_winsize); |
b7fb0758 | 280 | |
a50e2bc0 | 281 | if( /* old */ tpcb->tp_ucddata) { |
b7fb0758 | 282 | /* |
a50e2bc0 | 283 | * These data are the connect- , confirm- or disconnect- data. |
b7fb0758 KS |
284 | */ |
285 | struct mbuf *conndata; | |
286 | ||
a50e2bc0 | 287 | conndata = m_copy(tpcb->tp_ucddata, 0, (int)M_COPYALL); |
b7fb0758 KS |
288 | IFDEBUG(D_CONN) |
289 | dump_mbuf(conndata, "conndata after mcopy"); | |
b7fb0758 | 290 | ENDDEBUG |
a50e2bc0 | 291 | newtpcb->tp_ucddata = conndata; |
b7fb0758 KS |
292 | } |
293 | ||
294 | tpcb = newtpcb; | |
295 | tpcb->tp_state = TP_LISTENING; | |
296 | tpcb->tp_class = class_to_use; | |
297 | tpcb->tp_netservice = netservice; | |
298 | ||
299 | ||
300 | ASSERT( fname != 0 ) ; /* just checking */ | |
301 | if ( fname ) { | |
302 | /* | |
303 | * tp_route_to takes its address argument in the form of an mbuf. | |
304 | */ | |
305 | struct mbuf *m; | |
306 | int err; | |
307 | ||
308 | MGET(m, M_DONTWAIT, MT_SONAME); /* mbuf type used is confusing */ | |
309 | if (m) { | |
310 | /* | |
311 | * this seems a bit grotesque, but tp_route_to expects | |
312 | * an mbuf * instead of simply a sockaddr; it calls the ll | |
313 | * pcb_connect, which expects the name/addr in an mbuf as well. | |
314 | * sigh. | |
315 | */ | |
a50e2bc0 KS |
316 | bcopy((caddr_t)fname, mtod(m, caddr_t), fname->sa_len); |
317 | m->m_len = fname->sa_len; | |
b7fb0758 KS |
318 | |
319 | /* grot : have to say the kernel can override params in | |
320 | * the passive open case | |
321 | */ | |
322 | tpcb->tp_dont_change_params = 0; | |
323 | err = tp_route_to( m, tpcb, cons_channel); | |
324 | m_free(m); | |
325 | ||
326 | if (!err) | |
327 | goto ok; | |
328 | } | |
329 | IFDEBUG(D_CONN) | |
330 | printf("tp_route_to FAILED! detaching tpcb 0x%x, so 0x%x\n", | |
331 | tpcb, so); | |
332 | ENDDEBUG | |
333 | (void) tp_detach(tpcb); | |
334 | return 0; | |
335 | } | |
336 | ok: | |
337 | IFDEBUG(D_TPINPUT) | |
338 | printf("tp_newsocket returning so 0x%x, sototpcb(so) 0x%x\n", | |
339 | so, sototpcb(so)); | |
340 | ENDDEBUG | |
341 | return so; | |
342 | } | |
343 | ||
194a383a | 344 | #ifndef TPCONS |
b7fb0758 KS |
345 | tpcons_output() |
346 | { | |
347 | return(0); | |
348 | } | |
349 | #endif !CONS | |
350 | ||
351 | /* | |
352 | * NAME: tp_input() | |
353 | * | |
354 | * CALLED FROM: | |
355 | * net layer input routine | |
356 | * | |
357 | * FUNCTION and ARGUMENTS: | |
358 | * Process an incoming TPDU (m), finding the associated tpcb if there | |
359 | * is one. Create the appropriate type of event and call the driver. | |
360 | * (faddr) and (laddr) are the foreign and local addresses. | |
361 | * | |
362 | * When tp_input() is called we KNOW that the ENTIRE TP HEADER | |
363 | * has been m_pullup-ed. | |
364 | * | |
365 | * RETURN VALUE: Nada | |
366 | * | |
367 | * SIDE EFFECTS: | |
368 | * When using COSNS it may affect the state of the net-level pcb | |
369 | * | |
370 | * NOTE: | |
371 | * The initial value of acktime is 2 so that we will never | |
372 | * have a 0 value for tp_peer_acktime. It gets used in the | |
373 | * computation of the retransmission timer value, and so it | |
374 | * mustn't be zero. | |
375 | * 2 seems like a reasonable minimum. | |
376 | */ | |
377 | ProtoHook | |
20650f15 | 378 | tp_input(m, faddr, laddr, cons_channel, dgout_routine, ce_bit) |
b7fb0758 KS |
379 | register struct mbuf *m; |
380 | struct sockaddr *faddr, *laddr; /* NSAP addresses */ | |
381 | u_int cons_channel; | |
382 | int (*dgout_routine)(); | |
20650f15 | 383 | int ce_bit; |
b7fb0758 KS |
384 | |
385 | { | |
386 | register struct tp_pcb *tpcb = (struct tp_pcb *)0; | |
d9a01c3e | 387 | register struct tpdu *hdr; |
b7fb0758 KS |
388 | struct socket *so; |
389 | struct tp_event e; | |
facaece3 | 390 | int error = 0; |
b7fb0758 | 391 | unsigned dutype; |
facaece3 KS |
392 | u_short dref, sref = 0, acktime = 2, subseq = 0; /*VAX*/ |
393 | u_char preferred_class = 0, class_to_use = 0; | |
394 | u_char opt, dusize = TP_DFL_TPDUSIZE, addlopt = 0, version; | |
b7fb0758 | 395 | #ifdef TP_PERF_MEAS |
44f52ea5 | 396 | u_char perf_meas; |
b7fb0758 | 397 | #endif TP_PERF_MEAS |
63f88aec | 398 | u_char fsufxlen = 0, lsufxlen = 0, intercepted = 0; |
facaece3 KS |
399 | caddr_t fsufxloc = 0, lsufxloc = 0; |
400 | int tpdu_len = 0; | |
401 | u_int takes_data = FALSE; | |
402 | u_int fcc_present = FALSE; | |
403 | int errlen = 0; | |
b7fb0758 KS |
404 | struct tp_conn_param tpp; |
405 | int tpcons_output(); | |
406 | ||
44f52ea5 | 407 | again: |
d9a01c3e | 408 | hdr = mtod(m, struct tpdu *); |
b7fb0758 | 409 | #ifdef TP_PERF_MEAS |
44f52ea5 | 410 | GET_CUR_TIME( &e.e_time ); perf_meas = 0; |
b7fb0758 KS |
411 | #endif TP_PERF_MEAS |
412 | ||
413 | IFDEBUG(D_TPINPUT) | |
414 | printf("tp_input(0x%x, ... 0x%x)\n", m, cons_channel); | |
415 | ENDDEBUG | |
416 | ||
b7fb0758 | 417 | |
b7fb0758 KS |
418 | /* |
419 | * get the actual tpdu length - necessary for monitoring | |
420 | * and for checksumming | |
421 | * | |
422 | * Also, maybe measure the mbuf chain lengths and sizes. | |
423 | */ | |
424 | ||
425 | { register struct mbuf *n=m; | |
426 | # ifdef ARGO_DEBUG | |
427 | int chain_length = 0; | |
428 | # endif ARGO_DEBUG | |
429 | ||
430 | for(;;) { | |
431 | tpdu_len += n->m_len; | |
432 | IFDEBUG(D_MBUF_MEAS) | |
a50e2bc0 | 433 | if( n->m_flags & M_EXT) { |
b7fb0758 KS |
434 | IncStat(ts_mb_cluster); |
435 | } else { | |
436 | IncStat(ts_mb_small); | |
437 | } | |
438 | chain_length ++; | |
439 | ENDDEBUG | |
440 | if (n->m_next == MNULL ) { | |
441 | break; | |
442 | } | |
443 | n = n->m_next; | |
444 | } | |
445 | IFDEBUG(D_MBUF_MEAS) | |
446 | if(chain_length > 16) | |
447 | chain_length = 0; /* zero used for anything > 16 */ | |
448 | tp_stat.ts_mb_len_distr[chain_length] ++; | |
449 | ENDDEBUG | |
450 | } | |
451 | IFTRACE(D_TPINPUT) | |
452 | tptraceTPCB(TPPTtpduin, hdr->tpdu_type, hdr, hdr->tpdu_li+1, tpdu_len, | |
453 | 0); | |
454 | ENDTRACE | |
455 | ||
456 | dref = ntohs((short)hdr->tpdu_dref); | |
457 | sref = ntohs((short)hdr->tpdu_sref); | |
458 | dutype = (int)hdr->tpdu_type; | |
459 | ||
460 | IFDEBUG(D_TPINPUT) | |
461 | printf("input: dutype 0x%x cons_channel 0x%x dref 0x%x\n", dutype, | |
462 | cons_channel, dref); | |
463 | printf("input: dref 0x%x sref 0x%x\n", dref, sref); | |
464 | ENDDEBUG | |
465 | IFTRACE(D_TPINPUT) | |
466 | tptrace(TPPTmisc, "channel dutype dref ", | |
467 | cons_channel, dutype, dref, 0); | |
468 | ENDTRACE | |
469 | ||
470 | ||
471 | #ifdef ARGO_DEBUG | |
472 | if( (dutype < TP_MIN_TPDUTYPE) || (dutype > TP_MAX_TPDUTYPE)) { | |
473 | printf("BAD dutype! 0x%x, channel 0x%x dref 0x%x\n", | |
474 | dutype, cons_channel, dref); | |
475 | dump_buf (m, sizeof( struct mbuf )); | |
476 | ||
477 | IncStat(ts_inv_dutype); | |
478 | goto discard; | |
479 | } | |
480 | #endif ARGO_DEBUG | |
481 | ||
482 | CHECK( (dutype < TP_MIN_TPDUTYPE || dutype > TP_MAX_TPDUTYPE), | |
483 | E_TP_INV_TPDU, ts_inv_dutype, respond, | |
484 | 2 ); | |
485 | /* unfortunately we can't take the address of the tpdu_type field, | |
486 | * since it's a bit field - so we just use the constant offset 2 | |
487 | */ | |
488 | ||
489 | /* Now this isn't very neat but since you locate a pcb one way | |
490 | * at the beginning of connection establishment, and by | |
491 | * the dref for each tpdu after that, we have to treat CRs differently | |
492 | */ | |
493 | if ( dutype == CR_TPDU_type ) { | |
494 | u_char alt_classes = 0; | |
495 | ||
a50e2bc0 | 496 | preferred_class = 1 << hdr->tpdu_CRclass; |
b7fb0758 KS |
497 | opt = hdr->tpdu_CRoptions; |
498 | ||
499 | WHILE_OPTIONS(P, hdr, 1 ) /* { */ | |
500 | ||
501 | switch( vbptr(P)->tpv_code ) { | |
502 | ||
503 | case TPP_tpdu_size: | |
504 | vb_getval(P, u_char, dusize); | |
505 | IFDEBUG(D_TPINPUT) | |
506 | printf("CR dusize 0x%x\n", dusize); | |
507 | ENDDEBUG | |
facaece3 KS |
508 | /* COS tests: NBS IA (Dec. 1987) Sec. 4.5.2.1 */ |
509 | if (dusize < TP_MIN_TPDUSIZE || dusize > TP_MAX_TPDUSIZE) | |
510 | dusize = TP_DFL_TPDUSIZE; | |
b7fb0758 KS |
511 | break; |
512 | case TPP_addl_opt: | |
513 | vb_getval(P, u_char, addlopt); | |
514 | break; | |
515 | case TPP_calling_sufx: | |
516 | /* could use vb_getval, but we want to save the loc & len | |
517 | * for later use | |
518 | */ | |
519 | fsufxloc = (caddr_t) &vbptr(P)->tpv_val; | |
520 | fsufxlen = vbptr(P)->tpv_len; | |
521 | IFDEBUG(D_TPINPUT) | |
522 | printf("CR fsufx:"); | |
523 | { register int j; | |
524 | for(j=0; j<fsufxlen; j++ ) { | |
525 | printf(" 0x%x. ", *((caddr_t)(fsufxloc+j)) ); | |
526 | } | |
527 | printf("\n"); | |
528 | } | |
529 | ENDDEBUG | |
530 | break; | |
531 | case TPP_called_sufx: | |
532 | /* could use vb_getval, but we want to save the loc & len | |
533 | * for later use | |
534 | */ | |
535 | lsufxloc = (caddr_t) &vbptr(P)->tpv_val; | |
536 | lsufxlen = vbptr(P)->tpv_len; | |
537 | IFDEBUG(D_TPINPUT) | |
538 | printf("CR lsufx:"); | |
539 | { register int j; | |
540 | for(j=0; j<lsufxlen; j++ ) { | |
a50e2bc0 | 541 | printf(" 0x%x. ", *((u_char *)(lsufxloc+j)) ); |
b7fb0758 KS |
542 | } |
543 | printf("\n"); | |
544 | } | |
545 | ENDDEBUG | |
546 | break; | |
547 | ||
548 | #ifdef TP_PERF_MEAS | |
549 | case TPP_perf_meas: | |
550 | vb_getval(P, u_char, perf_meas); | |
551 | break; | |
552 | #endif TP_PERF_MEAS | |
553 | ||
554 | case TPP_vers: | |
555 | /* not in class 0; 1 octet; in CR_TPDU only */ | |
facaece3 | 556 | /* COS tests says if version wrong, use default version!?XXX */ |
b7fb0758 | 557 | CHECK( (vbval(P, u_char) != TP_VERSION ), |
10c42688 | 558 | E_TP_INV_PVAL, ts_inv_pval, setversion, |
facaece3 | 559 | (1 + (caddr_t)&vbptr(P)->tpv_val - (caddr_t)hdr) ); |
10c42688 KS |
560 | setversion: |
561 | version = vbval(P, u_char); | |
b7fb0758 KS |
562 | break; |
563 | case TPP_acktime: | |
564 | vb_getval(P, u_short, acktime); | |
565 | acktime = ntohs(acktime); | |
566 | acktime = acktime/500; /* convert to slowtimo ticks */ | |
567 | if((short)acktime <=0 ) | |
568 | acktime = 2; /* don't allow a bad peer to screw us up */ | |
569 | IFDEBUG(D_TPINPUT) | |
570 | printf("CR acktime 0x%x\n", acktime); | |
571 | ENDDEBUG | |
572 | break; | |
573 | ||
574 | case TPP_alt_class: | |
575 | { | |
576 | u_char *aclass = 0; | |
577 | register int i; | |
facaece3 KS |
578 | static u_char bad_alt_classes[5] = |
579 | { ~0, ~3, ~5, ~0xf, ~0x1f}; | |
b7fb0758 | 580 | |
facaece3 KS |
581 | aclass = |
582 | (u_char *) &(((struct tp_vbp *)P)->tpv_val); | |
b7fb0758 | 583 | for (i = ((struct tp_vbp *)P)->tpv_len; i>0; i--) { |
facaece3 | 584 | alt_classes |= (1<<((*aclass++)>>4)); |
b7fb0758 | 585 | } |
facaece3 KS |
586 | CHECK( (bad_alt_classes[hdr->tpdu_CRclass] & alt_classes), |
587 | E_TP_INV_PVAL, ts_inv_aclass, respond, | |
588 | ((caddr_t)aclass) - (caddr_t)hdr); | |
b7fb0758 KS |
589 | IFDEBUG(D_TPINPUT) |
590 | printf("alt_classes 0x%x\n", alt_classes); | |
591 | ENDDEBUG | |
592 | } | |
593 | break; | |
594 | ||
595 | case TPP_security: | |
596 | case TPP_residER: | |
597 | case TPP_priority: | |
598 | case TPP_transdelay: | |
599 | case TPP_throughput: | |
600 | case TPP_addl_info: | |
601 | case TPP_subseq: | |
d9a01c3e | 602 | default: |
b7fb0758 KS |
603 | IFDEBUG(D_TPINPUT) |
604 | printf("param ignored CR_TPDU code= 0x%x\n", | |
605 | vbptr(P)->tpv_code); | |
606 | ENDDEBUG | |
607 | IncStat(ts_param_ignored); | |
608 | break; | |
609 | ||
610 | case TPP_checksum: | |
611 | IFDEBUG(D_TPINPUT) | |
612 | printf("CR before cksum\n"); | |
613 | ENDDEBUG | |
614 | ||
615 | CHECK( iso_check_csum(m, tpdu_len), | |
616 | E_TP_INV_PVAL, ts_bad_csum, discard, 0) | |
617 | ||
618 | IFDEBUG(D_TPINPUT) | |
619 | printf("CR before cksum\n"); | |
620 | ENDDEBUG | |
621 | break; | |
b7fb0758 KS |
622 | } |
623 | ||
624 | /* } */ END_WHILE_OPTIONS(P) | |
625 | ||
63f88aec | 626 | if (lsufxlen == 0) { |
b7fb0758 KS |
627 | /* can't look for a tpcb w/o any called sufx */ |
628 | error = E_TP_LENGTH_INVAL; | |
629 | IncStat(ts_inv_sufx); | |
630 | goto respond; | |
631 | } else { | |
63f88aec | 632 | register struct tp_pcb *t; |
b7fb0758 | 633 | |
823532e9 | 634 | for (t = tp_intercepts; t ; t = t->tp_nextlisten) { |
63f88aec | 635 | if (laddr->sa_family != t->tp_nlproto->nlp_afamily) |
b7fb0758 | 636 | continue; |
823532e9 | 637 | if ((*t->tp_nlproto->nlp_cmpnetaddr)( |
63f88aec KS |
638 | t->tp_npcb, laddr, TP_LOCAL)) { |
639 | intercepted = 1; | |
640 | goto check_duplicate_cr; | |
b7fb0758 KS |
641 | } |
642 | } | |
823532e9 KS |
643 | for (t = tp_listeners; t ; t = t->tp_nextlisten) |
644 | if (bcmp(lsufxloc, t->tp_lsuffix, lsufxlen) == 0 && | |
645 | laddr->sa_family == t->tp_nlproto->nlp_afamily) | |
646 | break; | |
63f88aec | 647 | CHECK(t == 0, E_TP_NO_SESSION, ts_inv_sufx, respond, |
b7fb0758 KS |
648 | (1 + 2 + (caddr_t)&hdr->_tpduf - (caddr_t)hdr)) |
649 | /* _tpduf is the fixed part; add 2 to get the dref bits of | |
650 | * the fixed part (can't take the address of a bit field) | |
651 | */ | |
823532e9 KS |
652 | IFDEBUG(D_TPINPUT) |
653 | printf("checking if dup CR\n"); | |
654 | ENDDEBUG | |
63f88aec KS |
655 | check_duplicate_cr: |
656 | tpcb = t; | |
657 | for (t = tpcb->tp_next; t != tpcb; t = t->tp_next) { | |
658 | if (sref != t->tp_fref) | |
659 | continue; | |
660 | if ((*tpcb->tp_nlproto->nlp_cmpnetaddr)( | |
661 | t->tp_npcb, faddr, TP_FOREIGN)) { | |
662 | IFDEBUG(D_TPINPUT) | |
663 | printf("duplicate CR discarded\n"); | |
664 | ENDDEBUG | |
665 | goto discard; | |
666 | } | |
667 | } | |
668 | IFTRACE(D_TPINPUT) | |
669 | tptrace(TPPTmisc, "tp_input: tpcb *lsufxloc tpstate", | |
670 | tpcb, *lsufxloc, tpcb->tp_state, 0); | |
671 | ENDTRACE | |
b7fb0758 KS |
672 | } |
673 | ||
674 | /* | |
675 | * WE HAVE A TPCB | |
676 | * already know that the classes in the CR match at least | |
677 | * one class implemented, but we don't know yet if they | |
678 | * include any classes permitted by this server. | |
679 | */ | |
680 | ||
681 | IFDEBUG(D_TPINPUT) | |
682 | printf("HAVE A TPCB 1: 0x%x\n", tpcb); | |
683 | ENDDEBUG | |
684 | IFDEBUG(D_CONN) | |
685 | printf( | |
686 | "CR: bef CHKS: flags 0x%x class_to_use 0x%x alt 0x%x opt 0x%x tp_class 0x%x\n", | |
687 | tpcb->tp_flags, class_to_use, alt_classes, opt, tpcb->tp_class); | |
688 | ENDDEBUG | |
689 | /* tpcb->tp_class doesn't include any classes not implemented */ | |
690 | class_to_use = (preferred_class & tpcb->tp_class); | |
691 | if( (class_to_use = preferred_class & tpcb->tp_class) == 0 ) | |
692 | class_to_use = alt_classes & tpcb->tp_class; | |
693 | ||
694 | class_to_use = 1 << tp_mask_to_num(class_to_use); | |
695 | ||
696 | { | |
697 | tpp = tpcb->_tp_param; | |
698 | tpp.p_class = class_to_use; | |
699 | tpp.p_tpdusize = dusize; | |
700 | tpp.p_xtd_format = (opt & TPO_XTD_FMT) == TPO_XTD_FMT; | |
701 | tpp.p_xpd_service = (addlopt & TPAO_USE_TXPD) == TPAO_USE_TXPD; | |
702 | tpp.p_use_checksum = (tpp.p_class == TP_CLASS_0)?0: | |
703 | (addlopt & TPAO_NO_CSUM) == 0; | |
10c42688 | 704 | tpp.p_version = version; |
b7fb0758 KS |
705 | #ifdef notdef |
706 | tpp.p_use_efc = (opt & TPO_USE_EFC) == TPO_USE_EFC; | |
707 | tpp.p_use_nxpd = (addlopt & TPAO_USE_NXPD) == TPAO_USE_NXPD; | |
708 | tpp.p_use_rcc = (addlopt & TPAO_USE_RCC) == TPAO_USE_RCC; | |
709 | #endif notdef | |
710 | ||
711 | CHECK( | |
712 | tp_consistency(tpcb, 0 /* not force or strict */, &tpp) != 0, | |
713 | E_TP_NEGOT_FAILED, ts_negotfailed, respond, | |
714 | (1 + 2 + (caddr_t)&hdr->_tpdufr.CRCC - (caddr_t)hdr) | |
715 | /* ^ more or less the location of class */ | |
716 | ) | |
717 | } | |
718 | IFTRACE(D_CONN) | |
719 | tptrace(TPPTmisc, | |
720 | "after 1 consist class_to_use class, out, tpconsout", | |
721 | class_to_use, | |
722 | tpcb->tp_class, dgout_routine, tpcons_output | |
723 | ); | |
724 | ENDTRACE | |
725 | CHECK( | |
726 | ((class_to_use == TP_CLASS_0)&&(dgout_routine != tpcons_output)), | |
727 | E_TP_NEGOT_FAILED, ts_negotfailed, respond, | |
728 | (1 + 2 + (caddr_t)&hdr->_tpdufr.CRCC - (caddr_t)hdr) | |
729 | /* ^ more or less the location of class */ | |
730 | ) | |
731 | IFDEBUG(D_CONN) | |
732 | printf("CR: after CRCCCHECKS: tpcb 0x%x, flags 0x%x\n", | |
733 | tpcb, tpcb->tp_flags); | |
734 | ENDDEBUG | |
735 | takes_data = TRUE; | |
736 | e.ATTR(CR_TPDU).e_cdt = hdr->tpdu_CRcdt; | |
737 | e.ev_number = CR_TPDU; | |
738 | ||
739 | so = tpcb->tp_sock; | |
740 | if (so->so_options & SO_ACCEPTCONN) { | |
63f88aec | 741 | struct tp_pcb *parent_tpcb = tpcb; |
b7fb0758 KS |
742 | /* |
743 | * Create a socket, tpcb, ll pcb, etc. | |
744 | * for this newborn connection, and fill in all the values. | |
745 | */ | |
746 | IFDEBUG(D_CONN) | |
747 | printf("abt to call tp_newsocket(0x%x, 0x%x, 0x%x, 0x%x)\n", | |
748 | so, laddr, faddr, cons_channel); | |
749 | ENDDEBUG | |
750 | if( (so = | |
751 | tp_newsocket(so, faddr, cons_channel, | |
752 | class_to_use, | |
a50e2bc0 KS |
753 | ((tpcb->tp_netservice == IN_CLNS) ? IN_CLNS : |
754 | (dgout_routine == tpcons_output)?ISO_CONS:ISO_CLNS)) | |
b7fb0758 KS |
755 | ) == (struct socket *)0 ) { |
756 | /* note - even if netservice is IN_CLNS, as far as | |
757 | * the tp entity is concerned, the only differences | |
a50e2bc0 | 758 | * are CO vs CL |
b7fb0758 KS |
759 | */ |
760 | IFDEBUG(D_CONN) | |
761 | printf("tp_newsocket returns 0\n"); | |
762 | ENDDEBUG | |
763 | goto discard; | |
764 | } | |
765 | tpcb = sototpcb(so); | |
823532e9 | 766 | insque(tpcb, parent_tpcb); |
b7fb0758 | 767 | |
b7fb0758 | 768 | /* |
a50e2bc0 | 769 | * Stash the addresses in the net level pcb |
b7fb0758 KS |
770 | * kind of like a pcbconnect() but don't need |
771 | * or want all those checks. | |
772 | */ | |
773 | (tpcb->tp_nlproto->nlp_putnetaddr)(so->so_pcb, faddr, TP_FOREIGN); | |
774 | (tpcb->tp_nlproto->nlp_putnetaddr)(so->so_pcb, laddr, TP_LOCAL); | |
775 | ||
a50e2bc0 | 776 | /* stash the f suffix in the new tpcb */ |
a50e2bc0 | 777 | bcopy(fsufxloc, tpcb->tp_fsuffix, fsufxlen); |
63f88aec KS |
778 | /* l suffix is already there, unless this is an intercept case */ |
779 | if (intercepted) | |
780 | bcopy(lsufxloc, tpcb->tp_lsuffix, lsufxlen); | |
a50e2bc0 KS |
781 | (tpcb->tp_nlproto->nlp_putsufx) |
782 | (so->so_pcb, fsufxloc, fsufxlen, TP_FOREIGN); | |
44f52ea5 KS |
783 | (tpcb->tp_nlproto->nlp_putsufx) |
784 | (so->so_pcb, lsufxloc, lsufxlen, TP_LOCAL); | |
b7fb0758 KS |
785 | #ifdef TP_PERF_MEAS |
786 | if( tpcb->tp_perf_on = perf_meas ) { /* assignment */ | |
787 | /* ok, let's create an mbuf for stashing the | |
788 | * statistics if one doesn't already exist | |
789 | */ | |
790 | (void) tp_setup_perf(tpcb); | |
791 | } | |
792 | #endif TP_PERF_MEAS | |
793 | tpcb->tp_fref = sref; | |
794 | ||
795 | /* We've already checked for consistency with the options | |
796 | * set in tpp, but we couldn't set them earlier because | |
797 | * we didn't want to change options in the LISTENING tpcb. | |
798 | * Now we set the options in the new socket's tpcb. | |
799 | */ | |
800 | (void) tp_consistency( tpcb, TP_FORCE, &tpp); | |
801 | ||
802 | if(!tpcb->tp_use_checksum) | |
803 | IncStat(ts_csum_off); | |
804 | if(tpcb->tp_xpd_service) | |
805 | IncStat(ts_use_txpd); | |
806 | if(tpcb->tp_xtd_format) | |
807 | IncStat(ts_xtd_fmt); | |
808 | ||
809 | /* | |
810 | * Get the maximum transmission unit from the lower layer(s) | |
811 | * so we can negotiate a reasonable max TPDU size. | |
812 | */ | |
813 | (tpcb->tp_nlproto->nlp_mtu)(so, so->so_pcb, | |
814 | &tpcb->tp_l_tpdusize, &tpcb->tp_tpdusize, 0); | |
815 | tpcb->tp_peer_acktime = acktime; | |
816 | ||
817 | /* | |
818 | * The following kludge is used to test retransmissions and | |
819 | * timeout during connection establishment. | |
820 | */ | |
821 | IFDEBUG(D_ZDREF) | |
822 | IncStat(ts_zdebug); | |
a50e2bc0 | 823 | /*tpcb->tp_fref = 0;*/ |
b7fb0758 KS |
824 | ENDDEBUG |
825 | } | |
826 | IncStat(ts_CR_rcvd); | |
20650f15 KS |
827 | if (!tpcb->tp_cebit_off) { |
828 | tpcb->tp_win_recv = tp_start_win << 8; | |
829 | tpcb->tp_cong_sample.cs_size = 0; | |
830 | LOCAL_CREDIT(tpcb); | |
831 | CONG_INIT_SAMPLE(tpcb); | |
832 | CONG_UPDATE_SAMPLE(tpcb, ce_bit); | |
833 | } | |
834 | tpcb->tp_ackrcvd = 0; | |
b7fb0758 KS |
835 | } else if ( dutype == ER_TPDU_type ) { |
836 | /* | |
837 | * ER TPDUs have to be recognized separately | |
838 | * because they don't necessarily have a tpcb | |
839 | * with them and we don't want err out looking for such | |
840 | * a beast. | |
841 | * We could put a bunch of little kludges in the | |
842 | * next section of code so it would avoid references to tpcb | |
843 | * if dutype == ER_TPDU_type but we don't want code for ERs to | |
844 | * mess up code for data transfer. | |
845 | */ | |
846 | IncStat(ts_ER_rcvd); | |
847 | e.ev_number = ER_TPDU; | |
848 | e.ATTR(ER_TPDU).e_reason = (u_char)hdr->tpdu_ERreason; | |
849 | takes_data = 1; | |
850 | } else { | |
851 | /* tpdu type is CC, XPD, XAK, GR, AK, DR, DC, or DT */ | |
852 | ||
853 | /* In the next 4 checks, | |
854 | * _tpduf is the fixed part; add 2 to get the dref bits of | |
855 | * the fixed part (can't take the address of a bit field) | |
856 | */ | |
194a383a | 857 | #ifdef old_history |
b7fb0758 | 858 | if(cons_channel) { |
194a383a | 859 | #ifdef NARGOXTWENTYFIVE |
b7fb0758 KS |
860 | extern struct tp_pcb *cons_chan_to_tpcb(); |
861 | ||
862 | tpcb = cons_chan_to_tpcb( cons_channel ); | |
863 | /* Problem: We may have a legit | |
864 | * error situation yet we may or may not have | |
865 | * a correspondence between the tpcb and the vc, | |
866 | * e.g., TP4cr--> <no dice, respond w/ DR on vc> | |
867 | * <--- DR | |
868 | * Now it's up to TP to look at the tpdu and do one of: | |
869 | * confirm(dgm)(cr), confirm(circuit)(cr), reject(cr), or | |
870 | * nothing, if the circuit is already open (any other tpdu). | |
871 | * Sigh. | |
872 | */ | |
873 | ||
874 | /* I don't know about this error value */ | |
875 | CHECK( (tpcb == (struct tp_pcb *)0) , | |
876 | E_TP_NO_CR_ON_NC, ts_inv_dref, respond, | |
877 | (1 + 2 + (caddr_t)&hdr->_tpduf - (caddr_t)hdr)) | |
878 | #else | |
879 | printf("tp_input(): X25 NOT CONFIGURED!!\n"); | |
194a383a KS |
880 | #endif |
881 | } else | |
882 | /* we've now made the error reporting thing check for | |
883 | multiple channels and not close out if more than | |
884 | one in use */ | |
885 | #endif old_history | |
886 | { | |
b7fb0758 KS |
887 | |
888 | CHECK( ((int)dref <= 0 || dref >= N_TPREF) , | |
facaece3 | 889 | E_TP_MISM_REFS,ts_inv_dref, nonx_dref, |
b7fb0758 KS |
890 | (1 + 2 + (caddr_t)&hdr->_tpduf - (caddr_t)hdr)) |
891 | CHECK( ((tpcb = tp_ref[dref].tpr_pcb ) == (struct tp_pcb *) 0 ), | |
facaece3 | 892 | E_TP_MISM_REFS,ts_inv_dref, nonx_dref, |
b7fb0758 KS |
893 | (1 + 2 + (caddr_t)&hdr->_tpduf - (caddr_t)hdr)) |
894 | CHECK( (tpcb->tp_refp->tpr_state == REF_FREE), | |
facaece3 | 895 | E_TP_MISM_REFS,ts_inv_dref, nonx_dref, |
b7fb0758 KS |
896 | (1 + 2 + (caddr_t)&hdr->_tpduf - (caddr_t)hdr)) |
897 | } | |
898 | ||
899 | IFDEBUG(D_TPINPUT) | |
900 | printf("HAVE A TPCB 2: 0x%x\n", tpcb); | |
901 | ENDDEBUG | |
902 | ||
903 | /* causes a DR to be sent for CC; ER for all else */ | |
904 | CHECK( (tpcb->tp_refp->tpr_state == REF_FROZEN), | |
905 | (dutype == CC_TPDU_type?E_TP_NO_SESSION:E_TP_MISM_REFS), | |
906 | ts_inv_dref, respond, | |
907 | (1 + 2 + (caddr_t)&hdr->_tpduf - (caddr_t)hdr)) | |
908 | ||
909 | IFDEBUG(D_TPINPUT) | |
910 | printf("state of dref %d ok, tpcb 0x%x\n", dref,tpcb); | |
911 | ENDDEBUG | |
912 | /* | |
913 | * At this point the state of the dref could be | |
914 | * FROZEN: tpr_pcb == NULL, has ( reference only) timers | |
915 | * for example, DC may arrive after the close() has detached | |
916 | * the tpcb (e.g., if user turned off SO_LISTEN option) | |
917 | * OPENING : a tpcb exists but no timers yet | |
918 | * OPEN : tpcb exists & timers are outstanding | |
919 | */ | |
920 | ||
20650f15 KS |
921 | if (!tpcb->tp_cebit_off) |
922 | CONG_UPDATE_SAMPLE(tpcb, ce_bit); | |
923 | ||
b7fb0758 KS |
924 | dusize = tpcb->tp_tpdusize; |
925 | ||
926 | dutype = hdr->tpdu_type << 8; /* for the switch below */ | |
927 | ||
928 | WHILE_OPTIONS(P, hdr, tpcb->tp_xtd_format) /* { */ | |
929 | ||
a50e2bc0 | 930 | #define caseof(x,y) case (((x)<<8)+(y)) |
b7fb0758 KS |
931 | switch( dutype | vbptr(P)->tpv_code ) { |
932 | ||
933 | caseof( CC_TPDU_type, TPP_addl_opt ): | |
934 | /* not in class 0; 1 octet */ | |
935 | vb_getval(P, u_char, addlopt); | |
936 | break; | |
937 | caseof( CC_TPDU_type, TPP_tpdu_size ): | |
facaece3 KS |
938 | { |
939 | u_char odusize = dusize; | |
b7fb0758 | 940 | vb_getval(P, u_char, dusize); |
facaece3 KS |
941 | CHECK( (dusize < TP_MIN_TPDUSIZE || |
942 | dusize > TP_MAX_TPDUSIZE || dusize > odusize), | |
943 | E_TP_INV_PVAL, ts_inv_pval, respond, | |
944 | (1 + (caddr_t)&vbptr(P)->tpv_val - (caddr_t)hdr) ) | |
b7fb0758 KS |
945 | IFDEBUG(D_TPINPUT) |
946 | printf("CC dusize 0x%x\n", dusize); | |
947 | ENDDEBUG | |
facaece3 | 948 | } |
b7fb0758 KS |
949 | break; |
950 | caseof( CC_TPDU_type, TPP_calling_sufx): | |
951 | IFDEBUG(D_TPINPUT) | |
952 | printf("CC calling (local) sufxlen 0x%x\n", lsufxlen); | |
953 | ENDDEBUG | |
954 | lsufxloc = (caddr_t) &vbptr(P)->tpv_val; | |
955 | lsufxlen = vbptr(P)->tpv_len; | |
956 | break; | |
957 | caseof( CC_TPDU_type, TPP_acktime ): | |
958 | /* class 4 only, 2 octets */ | |
959 | vb_getval(P, u_short, acktime); | |
d9a01c3e | 960 | acktime = ntohs(acktime); |
b7fb0758 KS |
961 | acktime = acktime/500; /* convert to slowtimo ticks */ |
962 | if( (short)acktime <=0 ) | |
963 | acktime = 2; | |
964 | break; | |
965 | caseof( CC_TPDU_type, TPP_called_sufx): | |
966 | fsufxloc = (caddr_t) &vbptr(P)->tpv_val; | |
967 | fsufxlen = vbptr(P)->tpv_len; | |
968 | IFDEBUG(D_TPINPUT) | |
969 | printf("CC called (foreign) sufx len %d\n", fsufxlen); | |
970 | ENDDEBUG | |
971 | break; | |
972 | ||
973 | caseof( CC_TPDU_type, TPP_checksum): | |
974 | caseof( DR_TPDU_type, TPP_checksum): | |
975 | caseof( DT_TPDU_type, TPP_checksum): | |
976 | caseof( XPD_TPDU_type, TPP_checksum): | |
977 | if( tpcb->tp_use_checksum ) { | |
978 | CHECK( iso_check_csum(m, tpdu_len), | |
979 | E_TP_INV_PVAL, ts_bad_csum, discard, 0) | |
980 | } | |
981 | break; | |
982 | ||
983 | /* this is different from the above because in the context | |
984 | * of concat/ sep tpdu_len might not be the same as hdr len | |
985 | */ | |
986 | caseof( AK_TPDU_type, TPP_checksum): | |
987 | caseof( XAK_TPDU_type, TPP_checksum): | |
988 | caseof( DC_TPDU_type, TPP_checksum): | |
989 | if( tpcb->tp_use_checksum ) { | |
a50e2bc0 | 990 | CHECK( iso_check_csum(m, (int)hdr->tpdu_li + 1), |
b7fb0758 KS |
991 | E_TP_INV_PVAL, ts_bad_csum, discard, 0) |
992 | } | |
993 | break; | |
994 | #ifdef notdef | |
995 | caseof( DR_TPDU_type, TPP_addl_info ): | |
996 | /* ignore - its length and meaning are | |
997 | * user defined and there's no way | |
998 | * to pass this info to the user anyway | |
999 | */ | |
1000 | break; | |
1001 | #endif notdef | |
1002 | ||
1003 | caseof( AK_TPDU_type, TPP_subseq ): | |
1004 | /* used after reduction of window */ | |
1005 | vb_getval(P, u_short, subseq); | |
1006 | subseq = ntohs(subseq); | |
1007 | IFDEBUG(D_ACKRECV) | |
1008 | printf("AK Subsequence # 0x%x\n", subseq); | |
1009 | ENDDEBUG | |
1010 | break; | |
1011 | ||
1012 | caseof( AK_TPDU_type, TPP_flow_cntl_conf ): | |
1013 | { | |
1014 | u_int ylwe; | |
1015 | u_short ysubseq, ycredit; | |
1016 | ||
1017 | fcc_present = TRUE; | |
1018 | vb_getval(P, u_int, ylwe); | |
1019 | vb_getval(P, u_short, ysubseq); | |
1020 | vb_getval(P, u_short, ycredit); | |
1021 | ylwe = ntohl(ylwe); | |
1022 | ysubseq = ntohs(ysubseq); | |
1023 | ycredit = ntohs(ycredit); | |
1024 | IFDEBUG(D_ACKRECV) | |
1025 | printf("AK FCC lwe 0x%x, subseq 0x%x, cdt 0x%x\n", | |
1026 | ylwe, ysubseq, ycredit); | |
1027 | ENDDEBUG | |
1028 | } | |
1029 | break; | |
1030 | ||
1031 | default: | |
1032 | IFDEBUG(D_TPINPUT) | |
1033 | printf("param ignored dutype 0x%x, code 0x%x\n", | |
1034 | dutype, vbptr(P)->tpv_code); | |
1035 | ENDDEBUG | |
1036 | IFTRACE(D_TPINPUT) | |
1037 | tptrace(TPPTmisc, "param ignored dutype code ", | |
1038 | dutype, vbptr(P)->tpv_code ,0,0); | |
1039 | ENDTRACE | |
1040 | IncStat(ts_param_ignored); | |
1041 | break; | |
1042 | #undef caseof | |
1043 | } | |
1044 | /* } */ END_WHILE_OPTIONS(P) | |
1045 | ||
1046 | /* NOTE: the variable dutype has been shifted left! */ | |
1047 | ||
1048 | switch( hdr->tpdu_type ) { | |
1049 | case CC_TPDU_type: | |
1050 | /* If CC comes back with an unacceptable class | |
1051 | * respond with a DR or ER | |
1052 | */ | |
1053 | ||
1054 | opt = hdr->tpdu_CCoptions; /* 1 byte */ | |
1055 | ||
1056 | { | |
1057 | tpp = tpcb->_tp_param; | |
1058 | tpp.p_class = (1<<hdr->tpdu_CCclass); | |
1059 | tpp.p_tpdusize = dusize; | |
1060 | tpp.p_dont_change_params = 0; | |
1061 | tpp.p_xtd_format = (opt & TPO_XTD_FMT) == TPO_XTD_FMT; | |
1062 | tpp.p_xpd_service = (addlopt & TPAO_USE_TXPD) == TPAO_USE_TXPD; | |
1063 | tpp.p_use_checksum = (addlopt & TPAO_NO_CSUM) == 0; | |
1064 | #ifdef notdef | |
1065 | tpp.p_use_efc = (opt & TPO_USE_EFC) == TPO_USE_EFC; | |
1066 | tpp.p_use_nxpd = (addlopt & TPAO_USE_NXPD) == TPAO_USE_NXPD; | |
1067 | tpp.p_use_rcc = (addlopt & TPAO_USE_RCC) == TPAO_USE_RCC; | |
1068 | #endif notdef | |
1069 | ||
1070 | CHECK( | |
1071 | tp_consistency(tpcb, TP_FORCE, &tpp) != 0, | |
1072 | E_TP_NEGOT_FAILED, ts_negotfailed, respond, | |
1073 | (1 + 2 + (caddr_t)&hdr->_tpdufr.CRCC - (caddr_t)hdr) | |
1074 | /* ^ more or less the location of class */ | |
1075 | ) | |
1076 | IFTRACE(D_CONN) | |
1077 | tptrace(TPPTmisc, | |
1078 | "after 1 consist class, out, tpconsout", | |
1079 | tpcb->tp_class, dgout_routine, tpcons_output, 0 | |
1080 | ); | |
1081 | ENDTRACE | |
1082 | CHECK( | |
1083 | ((class_to_use == TP_CLASS_0)&& | |
1084 | (dgout_routine != tpcons_output)), | |
1085 | E_TP_NEGOT_FAILED, ts_negotfailed, respond, | |
1086 | (1 + 2 + (caddr_t)&hdr->_tpdufr.CRCC - (caddr_t)hdr) | |
1087 | /* ^ more or less the location of class */ | |
1088 | ) | |
194a383a KS |
1089 | #ifdef TPCONS |
1090 | if (tpcb->tp_netservice == ISO_CONS && | |
1091 | class_to_use == TP_CLASS_0) { | |
1092 | struct isopcb *isop = (struct isopcb *)tpcb->tp_npcb; | |
1093 | struct pklcd *lcp = (struct pklcd *)isop->isop_chan; | |
1094 | lcp->lcd_flags &= ~X25_DG_CIRCUIT; | |
1095 | } | |
1096 | #endif | |
b7fb0758 KS |
1097 | } |
1098 | if( ! tpcb->tp_use_checksum) | |
1099 | IncStat(ts_csum_off); | |
1100 | if(tpcb->tp_xpd_service) | |
1101 | IncStat(ts_use_txpd); | |
1102 | if(tpcb->tp_xtd_format) | |
1103 | IncStat(ts_xtd_fmt); | |
1104 | ||
1105 | IFTRACE(D_CONN) | |
1106 | tptrace(TPPTmisc, "after CC class flags dusize CCclass", | |
1107 | tpcb->tp_class, tpcb->tp_flags, tpcb->tp_tpdusize, | |
1108 | hdr->tpdu_CCclass); | |
1109 | ENDTRACE | |
1110 | ||
1111 | /* | |
1112 | * Get the maximum transmission unit from the lower layer(s) | |
1113 | * so we can decide how large a TPDU size to negotiate. | |
1114 | * It would be nice if the arguments to this | |
1115 | * were more reasonable. | |
1116 | */ | |
1117 | (tpcb->tp_nlproto->nlp_mtu)(tpcb->tp_sock, tpcb->tp_sock->so_pcb, | |
1118 | &tpcb->tp_l_tpdusize, &tpcb->tp_tpdusize, 0); | |
1119 | ||
b7fb0758 KS |
1120 | |
1121 | /* if called or calling suffices appeared on the CC, | |
1122 | * they'd better jive with what's in the pcb | |
1123 | */ | |
1124 | if( fsufxlen ) { | |
1125 | CHECK( ((tpcb->tp_fsuffixlen != fsufxlen) || | |
1126 | bcmp(fsufxloc, tpcb->tp_fsuffix, fsufxlen)), | |
1127 | E_TP_INV_PVAL,ts_inv_sufx, respond, | |
1128 | (1+fsufxloc - (caddr_t)hdr)) | |
1129 | } | |
1130 | if( lsufxlen ) { | |
1131 | CHECK( ((tpcb->tp_lsuffixlen != lsufxlen) || | |
1132 | bcmp(lsufxloc, tpcb->tp_lsuffix, lsufxlen)), | |
1133 | E_TP_INV_PVAL,ts_inv_sufx, respond, | |
1134 | (1+lsufxloc - (caddr_t)hdr)) | |
1135 | } | |
1136 | ||
b7fb0758 | 1137 | e.ATTR(CC_TPDU).e_sref = sref; |
b7fb0758 KS |
1138 | e.ATTR(CC_TPDU).e_cdt = hdr->tpdu_CCcdt; |
1139 | takes_data = TRUE; | |
1140 | e.ev_number = CC_TPDU; | |
1141 | IncStat(ts_CC_rcvd); | |
1142 | break; | |
1143 | ||
1144 | case DC_TPDU_type: | |
b7fb0758 KS |
1145 | if (sref != tpcb->tp_fref) |
1146 | printf("INPUT: inv sufx DCsref 0x%x, tp_fref 0x%x\n", | |
1147 | sref, tpcb->tp_fref); | |
b7fb0758 | 1148 | |
b7fb0758 | 1149 | CHECK( (sref != tpcb->tp_fref), |
facaece3 | 1150 | E_TP_MISM_REFS, ts_inv_sufx, discard, |
b7fb0758 | 1151 | (1 + (caddr_t)&hdr->tpdu_DCsref - (caddr_t)hdr)) |
facaece3 | 1152 | |
b7fb0758 KS |
1153 | e.ev_number = DC_TPDU; |
1154 | IncStat(ts_DC_rcvd); | |
1155 | break; | |
1156 | ||
1157 | case DR_TPDU_type: | |
1158 | IFTRACE(D_TPINPUT) | |
1159 | tptrace(TPPTmisc, "DR recvd", hdr->tpdu_DRreason, 0, 0, 0); | |
1160 | ENDTRACE | |
facaece3 | 1161 | if (sref != tpcb->tp_fref) { |
b7fb0758 KS |
1162 | printf("INPUT: inv sufx DRsref 0x%x tp_fref 0x%x\n", |
1163 | sref, tpcb->tp_fref); | |
facaece3 | 1164 | } |
b7fb0758 | 1165 | |
facaece3 KS |
1166 | CHECK( (sref != 0 && sref != tpcb->tp_fref && |
1167 | tpcb->tp_state != TP_CRSENT), | |
1168 | (TP_ERROR_SNDC | E_TP_MISM_REFS),ts_inv_sufx, respond, | |
b7fb0758 KS |
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; | |
b7fb0758 KS |
1173 | takes_data = TRUE; |
1174 | e.ev_number = DR_TPDU; | |
1175 | IncStat(ts_DR_rcvd); | |
1176 | break; | |
1177 | ||
1178 | case ER_TPDU_type: | |
1179 | IFTRACE(D_TPINPUT) | |
1180 | tptrace(TPPTmisc, "ER recvd", hdr->tpdu_ERreason,0,0,0); | |
1181 | ENDTRACE | |
1182 | e.ev_number = ER_TPDU; | |
1183 | e.ATTR(ER_TPDU).e_reason = hdr->tpdu_ERreason; | |
1184 | IncStat(ts_ER_rcvd); | |
1185 | break; | |
1186 | ||
1187 | case AK_TPDU_type: | |
1188 | ||
1189 | e.ATTR(AK_TPDU).e_subseq = subseq; | |
1190 | e.ATTR(AK_TPDU).e_fcc_present = fcc_present; | |
1191 | ||
1192 | if (tpcb->tp_xtd_format) { | |
1193 | #ifdef BYTE_ORDER | |
1194 | union seq_type seqeotX; | |
1195 | ||
1196 | seqeotX.s_seqeot = ntohl(hdr->tpdu_seqeotX); | |
1197 | e.ATTR(AK_TPDU).e_seq = seqeotX.s_seq; | |
1198 | e.ATTR(AK_TPDU).e_cdt = ntohs(hdr->tpdu_AKcdtX); | |
1199 | #else | |
1200 | e.ATTR(AK_TPDU).e_cdt = hdr->tpdu_AKcdtX; | |
1201 | e.ATTR(AK_TPDU).e_seq = hdr->tpdu_AKseqX; | |
1202 | #endif BYTE_ORDER | |
1203 | } else { | |
1204 | e.ATTR(AK_TPDU).e_cdt = hdr->tpdu_AKcdt; | |
1205 | e.ATTR(AK_TPDU).e_seq = hdr->tpdu_AKseq; | |
1206 | } | |
1207 | IFTRACE(D_TPINPUT) | |
1208 | tptrace(TPPTmisc, "AK recvd seq cdt subseq fcc_pres", | |
1209 | e.ATTR(AK_TPDU).e_seq, e.ATTR(AK_TPDU).e_cdt, | |
1210 | subseq, fcc_present); | |
1211 | ENDTRACE | |
1212 | ||
1213 | e.ev_number = AK_TPDU; | |
1214 | IncStat(ts_AK_rcvd); | |
1215 | IncPStat(tpcb, tps_AK_rcvd); | |
1216 | break; | |
1217 | ||
1218 | case XAK_TPDU_type: | |
1219 | if (tpcb->tp_xtd_format) { | |
1220 | #ifdef BYTE_ORDER | |
1221 | union seq_type seqeotX; | |
1222 | ||
1223 | seqeotX.s_seqeot = ntohl(hdr->tpdu_seqeotX); | |
1224 | e.ATTR(XAK_TPDU).e_seq = seqeotX.s_seq; | |
1225 | #else | |
1226 | e.ATTR(XAK_TPDU).e_seq = hdr->tpdu_XAKseqX; | |
1227 | #endif BYTE_ORDER | |
1228 | } else { | |
1229 | e.ATTR(XAK_TPDU).e_seq = hdr->tpdu_XAKseq; | |
1230 | } | |
1231 | e.ev_number = XAK_TPDU; | |
1232 | IncStat(ts_XAK_rcvd); | |
1233 | IncPStat(tpcb, tps_XAK_rcvd); | |
1234 | break; | |
1235 | ||
1236 | case XPD_TPDU_type: | |
1237 | if (tpcb->tp_xtd_format) { | |
1238 | #ifdef BYTE_ORDER | |
1239 | union seq_type seqeotX; | |
1240 | ||
1241 | seqeotX.s_seqeot = ntohl(hdr->tpdu_seqeotX); | |
1242 | e.ATTR(XPD_TPDU).e_seq = seqeotX.s_seq; | |
1243 | #else | |
1244 | e.ATTR(XPD_TPDU).e_seq = hdr->tpdu_XPDseqX; | |
1245 | #endif BYTE_ORDER | |
1246 | } else { | |
1247 | e.ATTR(XPD_TPDU).e_seq = hdr->tpdu_XPDseq; | |
1248 | } | |
1249 | takes_data = TRUE; | |
1250 | e.ev_number = XPD_TPDU; | |
1251 | IncStat(ts_XPD_rcvd); | |
1252 | IncPStat(tpcb, tps_XPD_rcvd); | |
1253 | break; | |
1254 | ||
1255 | case DT_TPDU_type: | |
1256 | { /* the y option will cause occasional packets to be dropped. | |
1257 | * A little crude but it works. | |
1258 | */ | |
1259 | ||
1260 | IFDEBUG(D_DROP) | |
1261 | if(time.tv_usec & 0x4 && hdr->tpdu_DTseq & 0x1) { | |
1262 | IncStat(ts_ydebug); | |
1263 | goto discard; | |
1264 | } | |
1265 | ENDDEBUG | |
1266 | } | |
1267 | if (tpcb->tp_class == TP_CLASS_0) { | |
1268 | e.ATTR(DT_TPDU).e_seq = 0; /* actually don't care */ | |
1269 | e.ATTR(DT_TPDU).e_eot = (((struct tp0du *)hdr)->tp0du_eot); | |
1270 | } else if (tpcb->tp_xtd_format) { | |
1271 | #ifdef BYTE_ORDER | |
1272 | union seq_type seqeotX; | |
1273 | ||
1274 | seqeotX.s_seqeot = ntohl(hdr->tpdu_seqeotX); | |
1275 | e.ATTR(DT_TPDU).e_seq = seqeotX.s_seq; | |
1276 | e.ATTR(DT_TPDU).e_eot = seqeotX.s_eot; | |
1277 | #else | |
1278 | e.ATTR(DT_TPDU).e_seq = hdr->tpdu_DTseqX; | |
1279 | e.ATTR(DT_TPDU).e_eot = hdr->tpdu_DTeotX; | |
1280 | #endif BYTE_ORDER | |
1281 | } else { | |
1282 | e.ATTR(DT_TPDU).e_seq = hdr->tpdu_DTseq; | |
1283 | e.ATTR(DT_TPDU).e_eot = hdr->tpdu_DTeot; | |
1284 | } | |
1285 | if(e.ATTR(DT_TPDU).e_eot) | |
1286 | IncStat(ts_eot_input); | |
1287 | takes_data = TRUE; | |
1288 | e.ev_number = DT_TPDU; | |
1289 | IncStat(ts_DT_rcvd); | |
1290 | IncPStat(tpcb, tps_DT_rcvd); | |
1291 | break; | |
1292 | ||
1293 | case GR_TPDU_type: | |
1294 | tp_indicate(T_DISCONNECT, tpcb, ECONNABORTED); | |
1295 | /* drop through */ | |
1296 | default: | |
1297 | /* this should NEVER happen because there is a | |
1298 | * check for dutype well above here | |
1299 | */ | |
1300 | error = E_TP_INV_TPDU; /* causes an ER */ | |
1301 | IFDEBUG(D_TPINPUT) | |
1302 | printf("INVALID dutype 0x%x\n", hdr->tpdu_type); | |
1303 | ENDDEBUG | |
1304 | IncStat(ts_inv_dutype); | |
1305 | goto respond; | |
1306 | } | |
1307 | } | |
b7fb0758 KS |
1308 | /* peel off the tp header; |
1309 | * remember that the du_li doesn't count itself. | |
1310 | * This may leave us w/ an empty mbuf at the front of a chain. | |
1311 | * We can't just throw away the empty mbuf because hdr still points | |
1312 | * into the mbuf's data area and we're still using hdr (the tpdu header) | |
1313 | */ | |
1314 | m->m_len -= ((int)hdr->tpdu_li + 1); | |
a50e2bc0 | 1315 | m->m_data += ((int)hdr->tpdu_li + 1); |
b7fb0758 | 1316 | |
a50e2bc0 KS |
1317 | if (takes_data) { |
1318 | int max = tpdu_info[ hdr->tpdu_type ] [TP_MAX_DATA_INDEX]; | |
1319 | int datalen = tpdu_len - hdr->tpdu_li - 1, mbtype = MT_DATA; | |
a0df93bc | 1320 | struct cmsghdr c_hdr; |
a50e2bc0 | 1321 | struct mbuf *n; |
b7fb0758 | 1322 | |
a50e2bc0 KS |
1323 | CHECK( (max && datalen > max), E_TP_LENGTH_INVAL, |
1324 | ts_inv_length, respond, (max + hdr->tpdu_li + 1) ); | |
b7fb0758 | 1325 | switch( hdr->tpdu_type ) { |
a50e2bc0 | 1326 | |
b7fb0758 | 1327 | case CR_TPDU_type: |
a50e2bc0 KS |
1328 | c_hdr.cmsg_type = TPOPT_CONN_DATA; |
1329 | goto make_control_msg; | |
1330 | ||
b7fb0758 | 1331 | case CC_TPDU_type: |
a50e2bc0 KS |
1332 | c_hdr.cmsg_type = TPOPT_CFRM_DATA; |
1333 | goto make_control_msg; | |
1334 | ||
b7fb0758 | 1335 | case DR_TPDU_type: |
a50e2bc0 KS |
1336 | c_hdr.cmsg_type = TPOPT_DISC_DATA; |
1337 | make_control_msg: | |
1338 | c_hdr.cmsg_level = SOL_TRANSPORT; | |
1339 | mbtype = MT_CONTROL; | |
c2bb180a KS |
1340 | MGET(n, M_DONTWAIT, MT_DATA); |
1341 | if (n) { | |
1342 | datalen += sizeof(c_hdr); | |
1343 | n->m_len = sizeof(c_hdr); | |
1344 | c_hdr.cmsg_len = datalen; | |
1345 | *mtod(n, struct cmsghdr *) = c_hdr; | |
1346 | n->m_next = m; | |
1347 | m = n; | |
1348 | } else {m_freem(m); m = 0; goto invoke;} | |
a50e2bc0 KS |
1349 | /* FALLTHROUGH */ |
1350 | ||
b7fb0758 | 1351 | case XPD_TPDU_type: |
a50e2bc0 KS |
1352 | if (mbtype != MT_CONTROL) |
1353 | mbtype = MT_OOBDATA; | |
1354 | m->m_flags |= M_EOR; | |
1355 | /* FALLTHROUGH */ | |
b7fb0758 | 1356 | |
a50e2bc0 KS |
1357 | case DT_TPDU_type: |
1358 | for (n = m; n; n = n->m_next) { | |
1359 | MCHTYPE(n, mbtype); | |
1360 | } | |
c2bb180a | 1361 | invoke: |
a50e2bc0 | 1362 | e.ATTR(DT_TPDU).e_datalen = datalen; |
b7fb0758 KS |
1363 | e.ATTR(DT_TPDU).e_data = m; |
1364 | break; | |
1365 | ||
1366 | default: | |
1367 | printf( | |
1368 | "ERROR in tp_input! hdr->tpdu_type 0x%x takes_data 0x%x m 0x%x\n", | |
1369 | hdr->tpdu_type, takes_data, m); | |
1370 | break; | |
1371 | } | |
1372 | /* prevent m_freem() after tp_driver() from throwing it all away */ | |
1373 | m = MNULL; | |
1374 | } | |
1375 | ||
1376 | IncStat(ts_tpdu_rcvd); | |
1377 | ||
1378 | IFDEBUG(D_TPINPUT) | |
1379 | printf( "tp_input: before driver, state 0x%x event 0x%x m 0x%x", | |
1380 | tpcb->tp_state, e.ev_number, m ); | |
1381 | printf(" e.e_data 0x%x\n", e.ATTR(DT_TPDU).e_data); | |
1382 | printf("takes_data 0x%x m_len 0x%x, tpdu_len 0x%x\n", | |
1383 | takes_data, (m==MNULL)?0:m->m_len, tpdu_len); | |
1384 | ENDDEBUG | |
1385 | ||
b7fb0758 KS |
1386 | error = tp_driver(tpcb, &e); |
1387 | ||
1388 | ASSERT(tpcb != (struct tp_pcb *)0); | |
1389 | ASSERT(tpcb->tp_sock != (struct socket *)0); | |
1390 | if( tpcb->tp_sock->so_error == 0 ) | |
1391 | tpcb->tp_sock->so_error = error; | |
1392 | ||
1393 | /* Kludge to keep the state tables under control (adding | |
1394 | * data on connect & disconnect & freeing the mbuf containing | |
1395 | * the data would have exploded the tables and made a big mess ). | |
1396 | */ | |
1397 | switch(e.ev_number) { | |
1398 | case CC_TPDU: | |
1399 | case DR_TPDU: | |
1400 | case CR_TPDU: | |
1401 | m = e.ATTR(CC_TPDU).e_data; /* same field for all three dutypes */ | |
1402 | IFDEBUG(D_TPINPUT) | |
1403 | printf("after driver, restoring m to 0x%x, takes_data 0x%x\n", | |
1404 | m, takes_data); | |
1405 | ENDDEBUG | |
1406 | break; | |
1407 | default: | |
1408 | break; | |
1409 | } | |
1410 | /* Concatenated sequences are terminated by any tpdu that | |
1411 | * carries data: CR, CC, DT, XPD, DR. | |
1412 | * All other tpdu types may be concatenated: AK, XAK, DC, ER. | |
1413 | */ | |
1414 | ||
1415 | separate: | |
1416 | if ( takes_data == 0 ) { | |
1417 | ASSERT( m != MNULL ); | |
1418 | /* | |
1419 | * we already peeled off the prev. tp header so | |
1420 | * we can just pull up some more and repeat | |
1421 | */ | |
1422 | ||
a50e2bc0 | 1423 | if( m = tp_inputprep(m) ) { |
b7fb0758 KS |
1424 | IFDEBUG(D_TPINPUT) |
1425 | hdr = mtod(m, struct tpdu *); | |
1426 | printf("tp_input @ separate: hdr 0x%x size %d m 0x%x\n", | |
1427 | hdr, (int) hdr->tpdu_li + 1, m); | |
1428 | dump_mbuf(m, "tp_input after driver, at separate"); | |
1429 | ENDDEBUG | |
1430 | ||
b7fb0758 KS |
1431 | IncStat(ts_concat_rcvd); |
1432 | goto again; | |
1433 | } | |
1434 | } | |
1435 | if ( m != MNULL ) { | |
1436 | IFDEBUG(D_TPINPUT) | |
1437 | printf("tp_input : m_freem(0x%x)\n", m); | |
1438 | ENDDEBUG | |
1439 | m_freem(m); | |
1440 | IFDEBUG(D_TPINPUT) | |
1441 | printf("tp_input : after m_freem 0x%x\n", m); | |
1442 | ENDDEBUG | |
1443 | } | |
1444 | return (ProtoHook) tpcb; | |
1445 | ||
1446 | discard: | |
1447 | /* class 4: drop the tpdu */ | |
1448 | /* class 2,0: Should drop the net connection, if you can figure out | |
1449 | * to which connection it applies | |
1450 | */ | |
1451 | IFDEBUG(D_TPINPUT) | |
1452 | printf("tp_input DISCARD\n"); | |
1453 | ENDDEBUG | |
1454 | IFTRACE(D_TPINPUT) | |
1455 | tptrace(TPPTmisc, "tp_input DISCARD m", m,0,0,0); | |
1456 | ENDTRACE | |
1457 | m_freem(m); | |
1458 | IncStat(ts_recv_drop); | |
1459 | return (ProtoHook)0; | |
1460 | ||
facaece3 KS |
1461 | nonx_dref: |
1462 | switch (dutype) { | |
1463 | default: | |
1464 | goto discard; | |
1465 | case CC_TPDU_type: | |
1466 | /* error = E_TP_MISM_REFS; */ | |
1467 | break; | |
1468 | case DR_TPDU_type: | |
1469 | error |= TP_ERROR_SNDC; | |
1470 | } | |
b7fb0758 | 1471 | respond: |
c2bb180a | 1472 | IFDEBUG(D_TPINPUT) |
facaece3 | 1473 | printf("RESPOND: error 0x%x, errlen 0x%x\n", error, errlen); |
b7fb0758 KS |
1474 | ENDDEBUG |
1475 | IFTRACE(D_TPINPUT) | |
facaece3 | 1476 | tptrace(TPPTmisc, "tp_input RESPOND m error sref", m, error, sref, 0); |
b7fb0758 | 1477 | ENDTRACE |
facaece3 | 1478 | if (sref == 0) |
b7fb0758 | 1479 | goto discard; |
a50e2bc0 | 1480 | (void) tp_error_emit(error, (u_long)sref, (struct sockaddr_iso *)faddr, |
facaece3 | 1481 | (struct sockaddr_iso *)laddr, m, errlen, tpcb, |
a50e2bc0 | 1482 | (int)cons_channel, dgout_routine); |
b7fb0758 KS |
1483 | IFDEBUG(D_ERROR_EMIT) |
1484 | printf("tp_input after error_emit\n"); | |
1485 | ENDDEBUG | |
1486 | ||
1487 | #ifdef lint | |
1488 | printf("",sref,opt); | |
1489 | #endif lint | |
1490 | IncStat(ts_recv_drop); | |
1491 | return (ProtoHook)0; | |
1492 | } | |
1493 | ||
1494 | ||
1495 | /* | |
1496 | * NAME: tp_headersize() | |
1497 | * | |
1498 | * CALLED FROM: | |
1499 | * tp_emit() and tp_sbsend() | |
1500 | * TP needs to know the header size so it can figure out how | |
1501 | * much data to put in each tpdu. | |
1502 | * | |
1503 | * FUNCTION, ARGUMENTS, and RETURN VALUE: | |
1504 | * For a given connection, represented by (tpcb), and | |
1505 | * tpdu type (dutype), return the size of a tp header. | |
1506 | * | |
1507 | * RETURNS: the expected size of the heade in bytesr | |
1508 | * | |
1509 | * SIDE EFFECTS: | |
1510 | * | |
1511 | * NOTES: It would be nice if it got the network header size as well. | |
1512 | */ | |
1513 | int | |
1514 | tp_headersize(dutype, tpcb) | |
1515 | int dutype; | |
1516 | struct tp_pcb *tpcb; | |
1517 | { | |
1518 | register int size = 0; | |
1519 | ||
1520 | IFTRACE(D_CONN) | |
1521 | tptrace(TPPTmisc, "tp_headersize dutype class xtd_format", | |
1522 | dutype, tpcb->tp_class, tpcb->tp_xtd_format, 0); | |
1523 | ENDTRACE | |
1524 | if( !( (tpcb->tp_class == TP_CLASS_0) || | |
1525 | (tpcb->tp_class == TP_CLASS_4) || | |
1526 | (dutype == DR_TPDU_type) || | |
1527 | (dutype == CR_TPDU_type) )) { | |
1528 | printf("tp_headersize:dutype 0x%x, class 0x%x", | |
1529 | dutype, tpcb->tp_class); | |
1530 | /* TODO: identify this and GET RID OF IT */ | |
1531 | } | |
1532 | ASSERT( (tpcb->tp_class == TP_CLASS_0) || | |
1533 | (tpcb->tp_class == TP_CLASS_4) || | |
1534 | (dutype == DR_TPDU_type) || | |
1535 | (dutype == CR_TPDU_type) ); | |
1536 | ||
1537 | if( tpcb->tp_class == TP_CLASS_0 ) { | |
1538 | size = tpdu_info[ dutype ] [TP_LEN_CLASS_0_INDEX]; | |
1539 | } else { | |
1540 | size = tpdu_info[ dutype ] [tpcb->tp_xtd_format]; | |
1541 | } | |
1542 | return size; | |
1543 | /* caller must get network level header size separately */ | |
1544 | } |