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1 | /*- |
2 | * Copyright (c) 1991 The Regents of the University of California. | |
3 | * All rights reserved. | |
4 | * | |
5 | * %sccs.include.redist.c% | |
6 | * | |
0570df3c | 7 | * @(#)if_cons.c 7.9 (Berkeley) %G% |
7bcd1bb8 KB |
8 | */ |
9 | ||
3b1d357b KS |
10 | /*********************************************************** |
11 | Copyright IBM Corporation 1987 | |
12 | ||
13 | All Rights Reserved | |
14 | ||
15 | Permission to use, copy, modify, and distribute this software and its | |
16 | documentation for any purpose and without fee is hereby granted, | |
17 | provided that the above copyright notice appear in all copies and that | |
18 | both that copyright notice and this permission notice appear in | |
19 | supporting documentation, and that the name of IBM not be | |
20 | used in advertising or publicity pertaining to distribution of the | |
21 | software without specific, written prior permission. | |
22 | ||
23 | IBM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING | |
24 | ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL | |
25 | IBM BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR | |
26 | ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, | |
27 | WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, | |
28 | ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS | |
29 | SOFTWARE. | |
30 | ||
31 | ******************************************************************/ | |
32 | ||
33 | /* | |
34 | * ARGO Project, Computer Sciences Dept., University of Wisconsin - Madison | |
35 | */ | |
36 | /* | |
37 | * $Header: if_cons.c,v 4.7 88/08/11 15:52:55 nhall Exp $ | |
38 | * $Source: /usr/argo/sys/netiso/RCS/if_cons.c,v $ | |
39 | * | |
40 | * cons.c - Connection Oriented Network Service: | |
41 | * including support for a) user transport-level service, | |
42 | * b) COSNS below CLNP, and c) CONS below TP. | |
194a383a | 43 | */ |
3b1d357b | 44 | |
194a383a KS |
45 | #ifdef TPCONS |
46 | #ifdef KERNEL | |
3b1d357b KS |
47 | #ifdef ARGO_DEBUG |
48 | #define Static | |
49 | unsigned LAST_CALL_PCB; | |
50 | #else ARGO_DEBUG | |
51 | #define Static static | |
52 | #endif ARGO_DEBUG | |
53 | ||
3b1d357b | 54 | |
3b1d357b | 55 | |
194a383a | 56 | #ifndef SOCK_STREAM |
3b1d357b KS |
57 | #include "param.h" |
58 | #include "systm.h" | |
59 | #include "mbuf.h" | |
60 | #include "protosw.h" | |
61 | #include "socket.h" | |
62 | #include "socketvar.h" | |
63 | #include "errno.h" | |
64 | #include "ioctl.h" | |
c3e97825 | 65 | #include "tsleep.h" |
3b1d357b KS |
66 | |
67 | #include "../net/if.h" | |
68 | #include "../net/netisr.h" | |
69 | #include "../net/route.h" | |
70 | ||
194a383a KS |
71 | #include "iso_errno.h" |
72 | #include "argo_debug.h" | |
73 | #include "tp_trace.h" | |
74 | #include "iso.h" | |
75 | #include "cons.h" | |
76 | #include "iso_pcb.h" | |
77 | ||
78 | #include "../netccitt/x25.h" | |
79 | #include "../netccitt/pk.h" | |
80 | #include "../netccitt/pk_var.h" | |
81 | #endif | |
3b1d357b KS |
82 | |
83 | #ifdef ARGO_DEBUG | |
84 | #define MT_XCONN 0x50 | |
85 | #define MT_XCLOSE 0x51 | |
86 | #define MT_XCONFIRM 0x52 | |
87 | #define MT_XDATA 0x53 | |
88 | #define MT_XHEADER 0x54 | |
89 | #else | |
90 | #define MT_XCONN MT_DATA | |
91 | #define MT_XCLOSE MT_DATA | |
92 | #define MT_XCONFIRM MT_DATA | |
93 | #define MT_XDATA MT_DATA | |
94 | #define MT_XHEADER MT_HEADER | |
95 | #endif ARGO_DEBUG | |
96 | ||
97 | #define DONTCLEAR -1 | |
98 | ||
99 | /********************************************************************* | |
194a383a | 100 | * cons.c - CONS interface to the x.25 layer |
3b1d357b KS |
101 | * |
102 | * TODO: figure out what resources we might run out of besides mbufs. | |
103 | * If we run out of any of them (including mbufs) close and recycle | |
104 | * lru x% of the connections, for some parameter x. | |
105 | * | |
194a383a | 106 | * There are 2 interfaces from above: |
3b1d357b KS |
107 | * 1) from TP0: |
108 | * cons CO network service | |
109 | * TP associates a transport connection with a network connection. | |
110 | * cons_output( isop, m, len, isdgm==0 ) | |
111 | * co_flags == 0 | |
194a383a | 112 | * 2) from TP4: |
3b1d357b KS |
113 | * It's a datagram service, like clnp is. - even though it calls |
114 | * cons_output( isop, m, len, isdgm==1 ) | |
115 | * it eventually goes through | |
116 | * cosns_output(ifp, m, dst). | |
117 | * TP4 permits multiplexing (reuse, possibly simultaneously) of the | |
118 | * network connections. | |
119 | * This means that many sockets (many tpcbs) may be associated with | |
194a383a | 120 | * this pklcd, hence cannot have a back ptr from pklcd to a tpcb. |
3b1d357b | 121 | * co_flags & CONSF_DGM |
194a383a | 122 | * co_socket is null since there may be many sockets that use this pklcd. |
3b1d357b KS |
123 | * |
124 | NOTE: | |
125 | streams would really be nice. sigh. | |
3b1d357b KS |
126 | NOTE: |
127 | PVCs could be handled by config-ing a cons with an address and with the | |
128 | IFF_POINTTOPOINT flag on. This code would then have to skip the | |
129 | connection setup stuff for pt-to-pt links. | |
3b1d357b KS |
130 | |
131 | ||
132 | *********************************************************************/ | |
133 | ||
3b1d357b KS |
134 | |
135 | #define CONS_IFQMAXLEN 5 | |
136 | ||
3b1d357b KS |
137 | |
138 | /* protosw pointers for getting to higher layer */ | |
139 | Static struct protosw *CLNP_proto; | |
140 | Static struct protosw *TP_proto; | |
141 | Static struct protosw *X25_proto; | |
142 | Static int issue_clear_req(); | |
143 | ||
144 | #ifndef PHASEONE | |
145 | extern struct ifaddr *ifa_ifwithnet(); | |
146 | #endif PHASEONE | |
147 | ||
148 | extern struct ifaddr *ifa_ifwithaddr(); | |
149 | ||
150 | Static struct socket dummysocket; /* for use by cosns */ | |
151 | ||
152 | extern struct isopcb tp_isopcb; /* chain of all TP pcbs */ | |
3b1d357b KS |
153 | struct isopcb tp_incoming_pending; /* incoming connections |
154 | for TP, pending */ | |
155 | ||
156 | struct isopcb *Xpcblist[] = { | |
3b1d357b KS |
157 | &tp_incoming_pending, |
158 | &tp_isopcb, | |
159 | (struct isopcb *)0 | |
160 | }; | |
161 | ||
162 | Static int parse_facil(), NSAPtoDTE(), make_partial_x25_packet(); | |
163 | Static int FACILtoNSAP(), DTEtoNSAP(); | |
194a383a | 164 | Static struct pklcd *cons_chan_to_pcb(); |
3b1d357b KS |
165 | |
166 | #define HIGH_NIBBLE 1 | |
167 | #define LOW_NIBBLE 0 | |
168 | ||
169 | /* | |
170 | * NAME: nibble_copy() | |
171 | * FUNCTION and ARGUMENTS: | |
172 | * copies (len) nibbles from (src_octet), high or low nibble | |
173 | * to (dst_octet), high or low nibble, | |
174 | * src_nibble & dst_nibble should be: | |
175 | * HIGH_NIBBLE (1) if leftmost 4 bits/ most significant nibble | |
176 | * LOW_NIBBLE (0) if rightmost 4 bits/ least significant nibble | |
177 | * RETURNS: VOID | |
178 | */ | |
179 | void | |
194a383a | 180 | nibble_copy(src_octet, src_nibble, dst_octet, dst_nibble, len) |
3b1d357b KS |
181 | register char *src_octet; |
182 | register char *dst_octet; | |
183 | register unsigned src_nibble; | |
184 | register unsigned dst_nibble; | |
185 | int len; | |
186 | { | |
187 | ||
188 | register i; | |
189 | register unsigned dshift, sshift; | |
190 | ||
191 | IFDEBUG(D_CADDR) | |
192 | printf("nibble_copy ( 0x%x, 0x%x, 0x%x, 0x%x 0x%x)\n", | |
193 | src_octet, src_nibble, dst_octet, dst_nibble, len); | |
194 | ENDDEBUG | |
195 | #define SHIFT 0x4 | |
196 | ||
197 | dshift = dst_nibble << 2; | |
198 | sshift = src_nibble << 2; | |
199 | ||
200 | for (i=0; i<len; i++) { | |
201 | /* clear dst_nibble */ | |
202 | *dst_octet &= ~(0xf<< dshift); | |
203 | ||
204 | /* set dst nibble */ | |
205 | *dst_octet |= ( 0xf & (*src_octet >> sshift))<< dshift; | |
206 | ||
207 | dshift ^= SHIFT; | |
208 | sshift ^= SHIFT; | |
209 | src_nibble = 1-src_nibble; | |
210 | dst_nibble = 1-dst_nibble; | |
211 | src_octet += src_nibble; | |
212 | dst_octet += dst_nibble; | |
213 | } | |
214 | IFDEBUG(D_CADDR) | |
215 | printf("nibble_copy DONE\n"); | |
216 | ENDDEBUG | |
217 | } | |
218 | ||
219 | /* | |
220 | * NAME: nibble_match() | |
221 | * FUNCTION and ARGUMENTS: | |
222 | * compares src_octet/src_nibble and dst_octet/dst_nibble for len nibbles. | |
223 | * RETURNS: 0 if they differ, 1 if they are the same. | |
224 | */ | |
225 | int | |
226 | nibble_match( src_octet, src_nibble, dst_octet, dst_nibble, len) | |
227 | register char *src_octet; | |
228 | register char *dst_octet; | |
229 | register unsigned src_nibble; | |
230 | register unsigned dst_nibble; | |
231 | int len; | |
232 | { | |
233 | ||
234 | register i; | |
235 | register unsigned dshift, sshift; | |
236 | u_char nibble_a, nibble_b; | |
237 | ||
238 | IFDEBUG(D_CADDR) | |
239 | printf("nibble_match ( 0x%x, 0x%x, 0x%x, 0x%x 0x%x)\n", | |
240 | src_octet, src_nibble, dst_octet, dst_nibble, len); | |
241 | ENDDEBUG | |
242 | #define SHIFT 0x4 | |
243 | ||
244 | dshift = dst_nibble << 2; | |
245 | sshift = src_nibble << 2; | |
246 | ||
247 | for (i=0; i<len; i++) { | |
248 | nibble_b = ((*dst_octet)>>dshift) & 0xf; | |
249 | nibble_a = ( 0xf & (*src_octet >> sshift)); | |
194a383a | 250 | if (nibble_b != nibble_a) |
3b1d357b KS |
251 | return 0; |
252 | ||
253 | dshift ^= SHIFT; | |
254 | sshift ^= SHIFT; | |
255 | src_nibble = 1-src_nibble; | |
256 | dst_nibble = 1-dst_nibble; | |
257 | src_octet += src_nibble; | |
258 | dst_octet += dst_nibble; | |
259 | } | |
260 | IFDEBUG(D_CADDR) | |
261 | printf("nibble_match DONE\n"); | |
262 | ENDDEBUG | |
263 | return 1; | |
264 | } | |
265 | ||
3b1d357b KS |
266 | /* |
267 | **************************** NET PROTOCOL cons *************************** | |
268 | */ | |
3b1d357b KS |
269 | /* |
270 | * NAME: cons_init() | |
271 | * CALLED FROM: | |
272 | * autoconf | |
273 | * FUNCTION: | |
274 | * initialize the protocol | |
275 | */ | |
276 | cons_init() | |
277 | { | |
194a383a | 278 | int tp_incoming(), clnp_incoming(); |
3b1d357b | 279 | |
194a383a KS |
280 | |
281 | CLNP_proto = pffindproto(AF_ISO, ISOPROTO_CLNP, SOCK_DGRAM); | |
282 | X25_proto = pffindproto(AF_ISO, ISOPROTO_X25, SOCK_STREAM); | |
283 | TP_proto = pffindproto(AF_ISO, ISOPROTO_TP0, SOCK_SEQPACKET); | |
3b1d357b | 284 | IFDEBUG(D_CCONS) |
194a383a KS |
285 | printf("cons_init end : cnlp_proto 0x%x cons proto 0x%x tp proto 0x%x\n", |
286 | CLNP_proto, X25_proto, TP_proto); | |
3b1d357b | 287 | ENDDEBUG |
3b1d357b | 288 | #ifdef notdef |
194a383a KS |
289 | pk_protolisten(0x81, 0, clnp_incoming); |
290 | pk_protolisten(0x82, 0, esis_incoming); | |
291 | pk_protolisten(0x84, 0, tp8878_A_incoming); | |
194a383a | 292 | pk_protolisten(0, 0, tp_incoming); |
0d1c7f4b | 293 | #endif |
3b1d357b KS |
294 | } |
295 | ||
194a383a KS |
296 | tp_incoming(lcp, m0) |
297 | struct pklcd *lcp; | |
298 | struct mbuf *m0; | |
299 | { | |
300 | register struct mbuf *m = m0->m_next; /* m0 has calling sockaddr_x25 */ | |
301 | register struct isopcb *isop; | |
302 | extern struct isopcb tp_isopcb; | |
303 | int cons_tpinput(); | |
3b1d357b | 304 | |
194a383a KS |
305 | if (iso_pcballoc((struct socket *)0, &tp_incoming_pending)) { |
306 | m_freem(m); | |
307 | pk_clear(lcp); | |
308 | return; | |
309 | } | |
310 | isop = tp_incoming_pending.isop_next; | |
311 | pk_output(lcp); /* Confirms call */ | |
312 | lcp->lcd_upper = cons_tpinput; | |
313 | lcp->lcd_upnext = (caddr_t)isop; | |
314 | isop->isop_chan = (caddr_t)lcp; | |
315 | isop->isop_laddr = &isop->isop_sladdr; | |
316 | isop->isop_faddr = &isop->isop_sfaddr; | |
317 | DTEtoNSAP(isop->isop_laddr, &lcp->lcd_laddr); | |
318 | DTEtoNSAP(isop->isop_faddr, &lcp->lcd_faddr); | |
319 | parse_facil(isop, lcp, &(mtod(m, struct x25_packet *)->packet_data), | |
320 | m->m_pkthdr.len - PKHEADERLN); | |
321 | m_freem(m); | |
322 | } | |
323 | ||
324 | cons_tpinput(lcp, m0) | |
325 | struct mbuf *m0; | |
326 | struct pklcd *lcp; | |
327 | { | |
328 | register struct isopcb *isop = (struct isopcb *)lcp->lcd_upnext; | |
329 | register struct x25_packet *xp; | |
330 | int cmd; | |
3b1d357b | 331 | |
dfcea4ca KS |
332 | if (isop == 0) |
333 | return; | |
334 | if (m0 == 0) { | |
335 | isop->isop_chan = 0; | |
336 | isop->isop_refcnt = 0; | |
337 | lcp->lcd_upnext = 0; | |
338 | lcp->lcd_upper = 0; | |
0d1c7f4b | 339 | goto dead; |
dfcea4ca | 340 | } |
194a383a KS |
341 | switch(m0->m_type) { |
342 | case MT_DATA: | |
343 | case MT_OOBDATA: | |
344 | tpcons_input(m0, isop->isop_faddr, isop->isop_laddr, | |
345 | (struct socket *)0, (caddr_t)lcp); | |
0570df3c | 346 | return; |
194a383a KS |
347 | |
348 | case MT_CONTROL: | |
349 | switch (pk_decode(mtod(m0, struct x25_packet *))) { | |
194a383a KS |
350 | |
351 | case RR: | |
352 | cmd = PRC_CONS_SEND_DONE; | |
3b1d357b | 353 | break; |
194a383a | 354 | |
dfcea4ca KS |
355 | case CALL_ACCEPTED: |
356 | if (lcp->lcd_sb.sb_mb) | |
357 | lcp->lcd_send(lcp); /* XXX - fix this */ | |
0570df3c KS |
358 | /*FALLTHROUGH*/ |
359 | default: | |
360 | return; | |
dfcea4ca | 361 | |
0d1c7f4b | 362 | dead: |
194a383a | 363 | case RESET: |
0d1c7f4b KS |
364 | case CLEAR: |
365 | case CLEAR_CONF: | |
194a383a | 366 | cmd = PRC_ROUTEDEAD; |
3b1d357b | 367 | } |
194a383a | 368 | tpcons_ctlinput(cmd, isop->isop_faddr, isop); |
3b1d357b | 369 | } |
3b1d357b KS |
370 | } |
371 | ||
372 | /* | |
194a383a | 373 | * NAME: cons_connect() |
3b1d357b | 374 | * CALLED FROM: |
194a383a KS |
375 | * tpcons_pcbconnect() when opening a new connection. |
376 | * FUNCTION anD ARGUMENTS: | |
377 | * Figures out which device to use, finding a route if one doesn't | |
378 | * already exist. | |
379 | * RETURN VALUE: | |
380 | * returns E* | |
3b1d357b | 381 | */ |
194a383a KS |
382 | cons_connect(isop) |
383 | register struct isopcb *isop; | |
3b1d357b | 384 | { |
194a383a KS |
385 | register struct pklcd *lcp = (struct pklcd *)isop->isop_chan; |
386 | register struct mbuf *m; | |
387 | struct ifaddr *ifa; | |
3b1d357b | 388 | |
194a383a KS |
389 | IFDEBUG(D_CCONN) |
390 | printf("cons_connect(0x%x): ", isop); | |
391 | dump_isoaddr(isop->isop_faddr); | |
392 | printf("myaddr: "); | |
393 | dump_isoaddr(isop->isop_laddr); | |
394 | printf("\n" ); | |
395 | ENDDEBUG | |
396 | NSAPtoDTE(isop->isop_faddr, &lcp->lcd_faddr); | |
dfcea4ca KS |
397 | lcp->lcd_upper = cons_tpinput; |
398 | lcp->lcd_upnext = (caddr_t)isop; | |
194a383a KS |
399 | IFDEBUG(D_CCONN) |
400 | printf( | |
401 | "calling make_partial_x25_packet( 0x%x, 0x%x, 0x%x)\n", | |
402 | &lcp->lcd_faddr, &lcp->lcd_laddr, | |
403 | isop->isop_socket->so_proto->pr_protocol); | |
404 | ENDDEBUG | |
405 | return (make_partial_x25_packet(isop, lcp, m) || | |
406 | pk_connect(lcp, &lcp->lcd_faddr)); | |
3b1d357b KS |
407 | } |
408 | ||
409 | /* | |
194a383a | 410 | **************************** DEVICE cons *************************** |
3b1d357b | 411 | */ |
3b1d357b | 412 | |
3b1d357b KS |
413 | |
414 | /* | |
194a383a | 415 | * NAME: cons_ctlinput() |
3b1d357b | 416 | * CALLED FROM: |
194a383a KS |
417 | * lower layer when ECN_CLEAR occurs : this routine is here |
418 | * for consistency - cons subnet service calls its higher layer | |
419 | * through the protosw entry. | |
420 | * FUNCTION & ARGUMENTS: | |
421 | * cmd is a PRC_* command, list found in ../sys/protosw.h | |
422 | * copcb is the obvious. | |
423 | * This serves the higher-layer cons service. | |
424 | * NOTE: this takes 3rd arg. because cons uses it to inform itself | |
425 | * of things (timeouts, etc) but has a pcb instead of an address. | |
3b1d357b | 426 | */ |
194a383a KS |
427 | cons_ctlinput(cmd, sa, copcb) |
428 | int cmd; | |
429 | struct sockaddr *sa; | |
430 | register struct pklcd *copcb; | |
3b1d357b | 431 | { |
3b1d357b | 432 | } |
3b1d357b | 433 | |
3b1d357b | 434 | |
194a383a KS |
435 | find_error_reason( xp ) |
436 | register struct x25_packet *xp; | |
437 | { | |
438 | extern u_char x25_error_stats[]; | |
439 | int error, cause; | |
3b1d357b | 440 | |
194a383a KS |
441 | if (xp) { |
442 | cause = 4[(char *)xp]; | |
443 | switch (cause) { | |
444 | case 0x00: | |
445 | case 0x80: | |
446 | /* DTE originated; look at the diagnostic */ | |
447 | error = (CONL_ERROR_MASK | cause); | |
448 | goto done; | |
3b1d357b | 449 | |
194a383a KS |
450 | case 0x01: /* number busy */ |
451 | case 0x81: | |
452 | case 0x09: /* Out of order */ | |
453 | case 0x89: | |
454 | case 0x11: /* Remot Procedure Error */ | |
455 | case 0x91: | |
456 | case 0x19: /* reverse charging accept not subscribed */ | |
457 | case 0x99: | |
458 | case 0x21: /* Incampat destination */ | |
459 | case 0xa1: | |
460 | case 0x29: /* fast select accept not subscribed */ | |
461 | case 0xa9: | |
462 | case 0x39: /* ship absent */ | |
463 | case 0xb9: | |
464 | case 0x03: /* invalid facil request */ | |
465 | case 0x83: | |
466 | case 0x0b: /* access barred */ | |
467 | case 0x8b: | |
468 | case 0x13: /* local procedure error */ | |
469 | case 0x93: | |
470 | case 0x05: /* network congestion */ | |
471 | case 0x85: | |
472 | case 0x8d: /* not obtainable */ | |
473 | case 0x0d: | |
474 | case 0x95: /* RPOA out of order */ | |
475 | case 0x15: | |
476 | /* take out bit 8 | |
477 | * so we don't have to have so many perror entries | |
478 | */ | |
479 | error = (CONL_ERROR_MASK | 0x100 | (cause & ~0x80)); | |
480 | goto done; | |
3b1d357b | 481 | |
194a383a KS |
482 | case 0xc1: /* gateway-detected proc error */ |
483 | case 0xc3: /* gateway congestion */ | |
3b1d357b | 484 | |
194a383a KS |
485 | error = (CONL_ERROR_MASK | 0x100 | cause); |
486 | goto done; | |
487 | } | |
488 | } | |
489 | /* otherwise, a *hopefully* valid perror exists in the e_reason field */ | |
490 | error = xp->packet_data; | |
491 | if (error = 0) { | |
492 | printf("Incoming PKT TYPE 0x%x with reason 0x%x\n", | |
493 | pk_decode(xp), | |
494 | cause); | |
495 | error = E_CO_HLI_DISCA; | |
496 | } | |
3b1d357b | 497 | |
194a383a KS |
498 | done: |
499 | return error; | |
500 | } | |
3b1d357b | 501 | |
3b1d357b | 502 | |
3b1d357b | 503 | |
194a383a | 504 | #endif KERNEL |
3b1d357b KS |
505 | |
506 | /* | |
507 | * NAME: make_partial_x25_packet() | |
508 | * | |
509 | * FUNCTION and ARGUMENTS: | |
194a383a | 510 | * Makes part of an X.25 call packet, for use by x25. |
3b1d357b | 511 | * (src) and (dst) are the NSAP-addresses of source and destination. |
3b1d357b KS |
512 | * (buf) is a ptr to a buffer into which to write this partial header. |
513 | * | |
194a383a KS |
514 | * 0 Facility length (in octets) |
515 | * 1 Facility field, which is a set of: | |
3b1d357b KS |
516 | * m facil code |
517 | * m+1 facil param len (for >2-byte facilities) in octets | |
518 | * m+2..p facil param field | |
519 | * q user data (protocol identification octet) | |
520 | * | |
521 | * | |
522 | * RETURNS: | |
523 | * 0 if OK | |
524 | * E* if failed. | |
194a383a KS |
525 | * |
526 | * SIDE EFFECTS: | |
527 | * Stores facilites mbuf in X.25 control block, where the connect | |
528 | * routine knows where to look for it. | |
3b1d357b KS |
529 | */ |
530 | ||
531 | #ifdef X25_1984 | |
532 | int cons_use_facils = 1; | |
533 | #else X25_1984 | |
534 | int cons_use_facils = 0; | |
535 | #endif X25_1984 | |
536 | ||
537 | int cons_use_udata = 1; /* KLUDGE FOR DEBUGGING */ | |
538 | ||
539 | Static int | |
194a383a KS |
540 | make_partial_x25_packet(isop, lcp) |
541 | struct isopcb *isop; | |
542 | struct pklcd *lcp; | |
3b1d357b | 543 | { |
3b1d357b KS |
544 | u_int proto; |
545 | int flag; | |
194a383a | 546 | caddr_t buf; |
0d1c7f4b | 547 | register caddr_t ptr; |
3b1d357b KS |
548 | register int len = 0; |
549 | int buflen =0; | |
550 | caddr_t facil_len; | |
551 | int oddness = 0; | |
194a383a | 552 | struct mbuf *m; |
3b1d357b KS |
553 | |
554 | ||
0570df3c KS |
555 | IFDEBUG(D_CCONN) |
556 | printf("make_partial_x25_packet(0x%x, 0x%x, 0x%x, 0x%x, 0x%x)\n", | |
557 | isop->isop_laddr, isop->isop_faddr, proto, m, flag); | |
558 | ENDDEBUG | |
559 | if (cons_use_udata) { | |
560 | if (isop->isop_x25crud_len > 0) { | |
561 | /* | |
562 | * The user specified something. Stick it in | |
563 | */ | |
564 | bcopy(isop->isop_x25crud, lcp->lcd_faddr.x25_udata, | |
565 | isop->isop_x25crud_len); | |
566 | lcp->lcd_faddr.x25_udlen = isop->isop_x25crud_len; | |
567 | } | |
568 | } | |
569 | ||
570 | if (cons_use_facils == 0) { | |
571 | lcp->lcd_facilities = 0; | |
572 | return 0; | |
573 | } | |
194a383a KS |
574 | MGET(m, MT_DATA, M_WAITOK); |
575 | if (m == 0) | |
576 | return ENOBUFS; | |
577 | buf = mtod(m, caddr_t); | |
0d1c7f4b | 578 | ptr = buf; |
3b1d357b | 579 | |
3b1d357b KS |
580 | /* ptr now points to facil length (len of whole facil field in OCTETS */ |
581 | facil_len = ptr ++; | |
582 | ||
583 | IFDEBUG(D_CADDR) | |
584 | printf("make_partial calling: ptr 0x%x, len 0x%x\n", ptr, | |
194a383a | 585 | isop->isop_laddr->siso_addr.isoa_len); |
3b1d357b | 586 | ENDDEBUG |
194a383a | 587 | if (cons_use_facils) { |
3b1d357b KS |
588 | *ptr = 0xcb; /* calling facility code */ |
589 | ptr ++; | |
590 | ptr ++; /* leave room for facil param len (in OCTETS + 1) */ | |
591 | ptr ++; /* leave room for the facil param len (in nibbles), | |
592 | * high two bits of which indicate full/partial NSAP | |
593 | */ | |
194a383a KS |
594 | len = isop->isop_laddr->siso_addr.isoa_len; |
595 | bcopy( isop->isop_laddr->siso_data, ptr, len); | |
0570df3c | 596 | *(ptr-2) = len+1; /* facil param len in octets */ |
3b1d357b KS |
597 | *(ptr-1) = len<<1; /* facil param len in nibbles */ |
598 | ptr += len; | |
599 | ||
600 | IFDEBUG(D_CADDR) | |
601 | printf("make_partial called: ptr 0x%x, len 0x%x\n", ptr, | |
194a383a | 602 | isop->isop_faddr->siso_addr.isoa_len); |
3b1d357b KS |
603 | ENDDEBUG |
604 | *ptr = 0xc9; /* called facility code */ | |
605 | ptr ++; | |
606 | ptr ++; /* leave room for facil param len (in OCTETS + 1) */ | |
607 | ptr ++; /* leave room for the facil param len (in nibbles), | |
608 | * high two bits of which indicate full/partial NSAP | |
609 | */ | |
194a383a KS |
610 | len = isop->isop_faddr->siso_nlen; |
611 | bcopy(isop->isop_faddr->siso_data, ptr, len); | |
0570df3c | 612 | *(ptr-2) = len+1; /* facil param len = addr len + 1 for each of these |
3b1d357b KS |
613 | * two length fields, in octets */ |
614 | *(ptr-1) = len<<1; /* facil param len in nibbles */ | |
615 | ptr += len; | |
616 | ||
617 | } | |
618 | *facil_len = ptr - facil_len - 1; | |
194a383a | 619 | if (*facil_len > MAX_FACILITIES) |
3b1d357b KS |
620 | return E_CO_PNA_LONG; |
621 | ||
3b1d357b KS |
622 | buflen = (int)(ptr - buf); |
623 | ||
624 | IFDEBUG(D_CDUMP_REQ) | |
625 | register int i; | |
626 | ||
627 | printf("ECN_CONNECT DATA buf 0x%x len %d (0x%x)\n", | |
628 | buf, buflen, buflen); | |
629 | for( i=0; i < buflen; ) { | |
630 | printf("+%d: %x %x %x %x %x %x %x %x\n", | |
631 | i, | |
632 | *(buf+i), *(buf+i+1), *(buf+i+2), *(buf+i+3), | |
633 | *(buf+i+4), *(buf+i+5), *(buf+i+6), *(buf+i+7)); | |
634 | i+=8; | |
635 | } | |
636 | ENDDEBUG | |
637 | IFDEBUG(D_CADDR) | |
638 | printf("make_partial returns buf 0x%x size 0x%x bytes\n", | |
639 | mtod(m, caddr_t), buflen); | |
640 | ENDDEBUG | |
641 | ||
194a383a | 642 | if (buflen > MHLEN) |
3b1d357b KS |
643 | return E_CO_PNA_LONG; |
644 | ||
645 | m->m_len = buflen; | |
194a383a | 646 | lcp->lcd_facilities = m; |
3b1d357b KS |
647 | return 0; |
648 | } | |
649 | ||
650 | /* | |
651 | * NAME: NSAPtoDTE() | |
652 | * CALLED FROM: | |
653 | * make_partial_x25_packet() | |
654 | * FUNCTION and ARGUMENTS: | |
655 | * get a DTE address from an NSAP-address (struct sockaddr_iso) | |
656 | * (dst_octet) is the octet into which to begin stashing the DTE addr | |
657 | * (dst_nibble) takes 0 or 1. 1 means begin filling in the DTE addr | |
658 | * in the high-order nibble of dst_octet. 0 means low-order nibble. | |
659 | * (addr) is the NSAP-address | |
660 | * (flag) is true if the transport suffix is to become the | |
661 | * last two digits of the DTE address | |
194a383a | 662 | * A DTE address is a series of ASCII digits |
3b1d357b KS |
663 | * |
664 | * A DTE address may have leading zeros. The are significant. | |
665 | * 1 digit per nibble, may be an odd number of nibbles. | |
666 | * | |
667 | * An NSAP-address has the DTE address in the IDI. Leading zeros are | |
668 | * significant. Trailing hex f indicates the end of the DTE address. | |
194a383a | 669 | * The IDI is a series of BCD digits, one per nibble. |
3b1d357b KS |
670 | * |
671 | * RETURNS | |
672 | * # significant digits in the DTE address, -1 if error. | |
673 | */ | |
674 | ||
675 | Static int | |
194a383a KS |
676 | NSAPtoDTE(siso, sx25) |
677 | register struct sockaddr_iso *siso; | |
678 | register struct sockaddr_x25 *sx25; | |
3b1d357b | 679 | { |
194a383a | 680 | int dtelen = -1; |
3b1d357b KS |
681 | |
682 | IFDEBUG(D_CADDR) | |
194a383a | 683 | printf("NSAPtoDTE: nsap: %s\n", clnp_iso_addrp(&siso->siso_addr)); |
3b1d357b KS |
684 | ENDDEBUG |
685 | ||
194a383a KS |
686 | if (siso->siso_data[0] == AFI_37) { |
687 | register char *out = sx25->x25_addr; | |
688 | register char *in = siso->siso_data + 1; | |
689 | register int nibble; | |
0d1c7f4b KS |
690 | char *lim = siso->siso_data + siso->siso_nlen; |
691 | char *olim = out+15; | |
194a383a | 692 | int lowNibble = 0; |
3b1d357b | 693 | |
194a383a KS |
694 | while (in < lim) { |
695 | nibble = ((lowNibble ? *in++ : (*in >> 4)) & 0xf) | 0x30; | |
696 | lowNibble ^= 1; | |
0d1c7f4b | 697 | if (nibble != 0x3f && out < olim) |
194a383a KS |
698 | *out++ = nibble; |
699 | } | |
700 | dtelen = out - sx25->x25_addr; | |
701 | *out++ = 0; | |
702 | } else { | |
703 | register struct rtentry *rt = rtalloc1(siso, 1); | |
704 | /* error = iso_8208snparesolve(addr, x121string, &x121strlen);*/ | |
705 | ||
706 | if (rt) { | |
707 | register struct sockaddr_x25 *sxx = | |
708 | (struct sockaddr_x25 *)rt->rt_gateway; | |
709 | register char *in = sxx->x25_addr; | |
710 | ||
711 | rt->rt_use--; | |
712 | if (sxx && sxx->x25_family == AF_CCITT) { | |
713 | bcopy(sx25->x25_addr, sxx->x25_addr, sizeof(sx25->x25_addr)); | |
714 | while (*in++) {} | |
715 | dtelen = in - sxx->x25_addr; | |
716 | } | |
717 | } | |
718 | } | |
719 | return dtelen; | |
3b1d357b KS |
720 | } |
721 | ||
722 | /* | |
723 | * NAME: FACILtoNSAP() | |
724 | * CALLED FROM: | |
725 | * parse_facil() | |
726 | * FUNCTION and ARGUMENTS: | |
727 | * Creates and NSAP in the sockaddr_iso (addr) from the | |
194a383a | 728 | * x.25 facility found at buf - 1. |
3b1d357b | 729 | * RETURNS: |
194a383a | 730 | * length of parameter if ok, -1 if error. |
3b1d357b KS |
731 | */ |
732 | ||
733 | Static int | |
194a383a KS |
734 | FACILtoNSAP(addr, buf) |
735 | u_char *buf; | |
3b1d357b KS |
736 | register struct sockaddr_iso *addr; |
737 | { | |
194a383a KS |
738 | int len_in_nibbles, param_len = *buf++; |
739 | u_char buf_len; /* in bytes */ | |
3b1d357b KS |
740 | |
741 | IFDEBUG(D_CADDR) | |
742 | printf("FACILtoNSAP( 0x%x, 0x%x, 0x%x )\n", | |
743 | buf, buf_len, addr ); | |
744 | ENDDEBUG | |
745 | ||
194a383a KS |
746 | len_in_nibbles = *buf & 0x3f; |
747 | buf_len = (len_in_nibbles + 1) >> 1; | |
3b1d357b KS |
748 | /* despite the fact that X.25 makes us put a length in nibbles |
749 | * here, the NSAP-addrs are always in full octets | |
750 | */ | |
194a383a KS |
751 | switch (*buf++ & 0xc0) { |
752 | case 0: | |
753 | /* Entire OSI NSAP address */ | |
754 | bcopy((caddr_t)buf, addr->siso_data, addr->siso_nlen = buf_len); | |
755 | break; | |
3b1d357b | 756 | |
194a383a KS |
757 | case 40: |
758 | /* Partial OSI NSAP address, assume trailing */ | |
759 | if (buf_len + addr->siso_nlen > sizeof(addr->siso_addr)) | |
760 | return -1; | |
761 | bcopy((caddr_t)buf, TSEL(addr), buf_len); | |
762 | addr->siso_nlen += buf_len; | |
763 | break; | |
3b1d357b | 764 | |
194a383a KS |
765 | default: |
766 | /* Rather than blow away the connection, just ignore and use | |
767 | NSAP from DTE */; | |
3b1d357b | 768 | } |
194a383a KS |
769 | return param_len; |
770 | } | |
3b1d357b | 771 | |
194a383a KS |
772 | static |
773 | init_siso(siso) | |
774 | register struct sockaddr_iso *siso; | |
775 | { | |
776 | siso->siso_len = sizeof (*siso); | |
777 | siso->siso_family = AF_ISO; | |
778 | siso->siso_data[0] = AFI_37; | |
779 | siso->siso_nlen = 8; | |
3b1d357b KS |
780 | } |
781 | ||
782 | /* | |
783 | * NAME: DTEtoNSAP() | |
784 | * CALLED FROM: | |
785 | * parse_facil() | |
786 | * FUNCTION and ARGUMENTS: | |
787 | * Creates a type 37 NSAP in the sockaddr_iso (addr) | |
194a383a | 788 | * from a DTE address found in a sockaddr_x25. |
3b1d357b KS |
789 | * |
790 | * RETURNS: | |
791 | * 0 if ok; E* otherwise. | |
792 | */ | |
793 | ||
794 | Static int | |
194a383a | 795 | DTEtoNSAP(addr, sx) |
3b1d357b | 796 | struct sockaddr_iso *addr; |
194a383a | 797 | struct sockaddr_x25 *sx; |
3b1d357b | 798 | { |
194a383a KS |
799 | register char *in, *out; |
800 | register int first; | |
801 | int pad_tail = 0; | |
802 | int src_len; | |
3b1d357b | 803 | |
3b1d357b | 804 | |
194a383a KS |
805 | init_siso(addr); |
806 | src_len = strlen(sx->x25_addr); | |
807 | in = sx->x25_addr; | |
808 | out = addr->siso_data + 1; | |
809 | if (*in == '0' && (src_len & 1 == 0)) { | |
810 | pad_tail = 0xf; | |
811 | src_len++; | |
812 | } | |
813 | for (first = 0; src_len > 0; src_len --) { | |
814 | first |= *in++; | |
815 | if (src_len & 1) { | |
816 | *out++ = first; | |
817 | first = 0; | |
818 | } | |
819 | else first <<= 4; | |
820 | } | |
821 | if (pad_tail) | |
822 | out[-1] |= 0xf; | |
3b1d357b KS |
823 | return 0; /* ok */ |
824 | } | |
825 | ||
826 | /* | |
827 | * FUNCTION and ARGUMENTS: | |
828 | * parses (buf_len) bytes beginning at (buf) and finds | |
829 | * a called nsap, a calling nsap, and protocol identifier. | |
830 | * RETURNS: | |
831 | * 0 if ok, E* otherwise. | |
832 | */ | |
833 | ||
194a383a KS |
834 | static int |
835 | parse_facil(lcp, isop, buf, buf_len) | |
3b1d357b KS |
836 | caddr_t buf; |
837 | u_char buf_len; /* in bytes */ | |
194a383a KS |
838 | struct isopcb *isop; |
839 | struct pklcd *lcp; | |
3b1d357b | 840 | { |
194a383a KS |
841 | register struct sockaddr_iso *called = isop->isop_laddr; |
842 | register struct sockaddr_iso *calling = isop->isop_faddr; | |
3b1d357b | 843 | register int i; |
194a383a KS |
844 | register u_char *ptr = (u_char *)buf; |
845 | u_char *ptr_lim, *facil_lim; | |
846 | int facil_param_len, facil_len; | |
3b1d357b KS |
847 | |
848 | IFDEBUG(D_CADDR) | |
194a383a KS |
849 | printf("parse_facil(0x%x, 0x%x, 0x%x, 0x%x)\n", |
850 | buf, buf_len, called, calling); | |
3b1d357b KS |
851 | dump_buf(buf, buf_len); |
852 | ENDDEBUG | |
853 | ||
854 | /* find the beginnings of the facility fields in buf | |
855 | * by skipping over the called & calling DTE addresses | |
856 | * i <- # nibbles in called + # nibbles in calling | |
857 | * i += 1 so that an odd nibble gets rounded up to even | |
858 | * before dividing by 2, then divide by two to get # octets | |
859 | */ | |
194a383a | 860 | i = (int)(*ptr >> 4) + (int)(*ptr&0xf); |
3b1d357b | 861 | i++; |
194a383a | 862 | ptr += i >> 1; |
3b1d357b KS |
863 | ptr ++; /* plus one for the DTE lengths byte */ |
864 | ||
865 | /* ptr now is at facil_length field */ | |
194a383a KS |
866 | facil_len = *ptr++; |
867 | facil_lim = ptr + facil_len; | |
3b1d357b | 868 | IFDEBUG(D_CADDR) |
194a383a | 869 | printf("parse_facils: facil length is 0x%x\n", (int) facil_len); |
3b1d357b KS |
870 | ENDDEBUG |
871 | ||
194a383a | 872 | while (ptr <= facil_lim) { |
3b1d357b | 873 | /* get NSAP addresses from facilities */ |
194a383a | 874 | switch (*ptr++) { |
3b1d357b | 875 | case 0xcb: |
194a383a KS |
876 | /* calling NSAP */ |
877 | facil_param_len = FACILtoNSAP(isop->isop_faddr, ptr); | |
3b1d357b KS |
878 | break; |
879 | case 0xc9: | |
194a383a KS |
880 | /* called NSAP */ |
881 | facil_param_len = FACILtoNSAP(isop->isop_laddr, ptr); | |
3b1d357b KS |
882 | break; |
883 | ||
884 | /* from here to default are legit cases that I ignore */ | |
3b1d357b KS |
885 | /* variable length */ |
886 | case 0xca: /* end-to-end transit delay negot */ | |
887 | case 0xc6: /* network user id */ | |
888 | case 0xc5: /* charging info : indicating monetary unit */ | |
889 | case 0xc2: /* charging info : indicating segment count */ | |
890 | case 0xc1: /* charging info : indicating call duration */ | |
891 | case 0xc4: /* RPOA extended format */ | |
892 | case 0xc3: /* call redirection notification */ | |
893 | facil_param_len = 0; | |
3b1d357b KS |
894 | break; |
895 | ||
896 | /* 1 octet */ | |
897 | case 0x0a: /* min. throughput class negot */ | |
898 | case 0x02: /* throughput class */ | |
899 | case 0x03: case 0x47: /* CUG shit */ | |
900 | case 0x0b: /* expedited data negot */ | |
901 | case 0x01: /* Fast select or reverse charging | |
902 | (example of intelligent protocol design) */ | |
903 | case 0x04: /* charging info : requesting service */ | |
904 | case 0x08: /* called line addr modified notification */ | |
905 | facil_param_len = 1; | |
3b1d357b KS |
906 | break; |
907 | ||
908 | /* any 2 octets */ | |
909 | case 0x42: /* pkt size */ | |
910 | case 0x43: /* win size */ | |
911 | case 0x44: /* RPOA basic format */ | |
912 | case 0x41: /* bilateral CUG shit */ | |
913 | case 0x49: /* transit delay selection and indication */ | |
914 | facil_param_len = 2; | |
3b1d357b KS |
915 | break; |
916 | ||
917 | /* don't have any 3 octets */ | |
918 | /* | |
919 | facil_param_len = 3; | |
920 | */ | |
921 | default: | |
3b1d357b KS |
922 | printf( |
923 | "BOGUS FACILITY CODE facil_len 0x%x *facil_len 0x%x, ptr 0x%x *ptr 0x%x\n", | |
194a383a | 924 | ptr, facil_len, ptr - 1, ptr[-1]); |
3b1d357b KS |
925 | /* facil that we don't handle */ |
926 | return E_CO_HLI_REJI; | |
927 | } | |
194a383a KS |
928 | if (facil_param_len == -1) |
929 | return E_CO_REG_ICDA; | |
930 | if (facil_param_len == 0) /* variable length */ | |
3b1d357b | 931 | facil_param_len = (int)*ptr; /* 1 + the real facil param */ |
3b1d357b KS |
932 | ptr += facil_param_len; |
933 | } | |
3b1d357b KS |
934 | return 0; |
935 | } | |
936 | ||
194a383a | 937 | #endif TPCONS |