1 /*
2 * ipxcp.c - PPP IPX Control Protocol.
3 *
4 * Copyright (c) 1984-2000 Carnegie Mellon University. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
16 * distribution.
17 *
18 * 3. The name "Carnegie Mellon University" must not be used to
19 * endorse or promote products derived from this software without
20 * prior written permission. For permission or any legal
21 * details, please contact
22 * Office of Technology Transfer
23 * Carnegie Mellon University
24 * 5000 Forbes Avenue
25 * Pittsburgh, PA 15213-3890
26 * (412) 268-4387, fax: (412) 268-7395
27 * tech-transfer@andrew.cmu.edu
28 *
29 * 4. Redistributions of any form whatsoever must retain the following
30 * acknowledgment:
31 * "This product includes software developed by Computing Services
32 * at Carnegie Mellon University (http://www.cmu.edu/computing/)."
33 *
34 * CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO
35 * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
36 * AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE
37 * FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
38 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
39 * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
40 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
41 */
42
43 #ifdef IPX_CHANGE
44
45 #define RCSID "$Id: ipxcp.c,v 1.23 2004/11/13 02:28:15 paulus Exp $"
46
47 /*
48 * TODO:
49 */
50
51 #include <stdio.h>
52 #include <string.h>
53 #include <unistd.h>
54 #include <ctype.h>
55 #include <sys/types.h>
56 #include <sys/socket.h>
57 #include <netinet/in.h>
58
59 #include "pppd.h"
60 #include "fsm.h"
61 #include "ipxcp.h"
62 #include "pathnames.h"
63 #include "magic.h"
64
65 static const char rcsid[] = RCSID;
66
67 /* global vars */
68 ipxcp_options ipxcp_wantoptions[NUM_PPP]; /* Options that we want to request */
69 ipxcp_options ipxcp_gotoptions[NUM_PPP]; /* Options that peer ack'd */
70 ipxcp_options ipxcp_allowoptions[NUM_PPP]; /* Options we allow peer to request */
71 ipxcp_options ipxcp_hisoptions[NUM_PPP]; /* Options that we ack'd */
72
73 #define wo (&ipxcp_wantoptions[0])
74 #define ao (&ipxcp_allowoptions[0])
75 #define go (&ipxcp_gotoptions[0])
76 #define ho (&ipxcp_hisoptions[0])
77
78 /*
79 * Callbacks for fsm code. (CI = Configuration Information)
80 */
81 static void ipxcp_resetci __P((fsm *)); /* Reset our CI */
82 static int ipxcp_cilen __P((fsm *)); /* Return length of our CI */
83 static void ipxcp_addci __P((fsm *, u_char *, int *)); /* Add our CI */
84 static int ipxcp_ackci __P((fsm *, u_char *, int)); /* Peer ack'd our CI */
85 static int ipxcp_nakci __P((fsm *, u_char *, int, int));/* Peer nak'd our CI */
86 static int ipxcp_rejci __P((fsm *, u_char *, int)); /* Peer rej'd our CI */
87 static int ipxcp_reqci __P((fsm *, u_char *, int *, int)); /* Rcv CI */
88 static void ipxcp_up __P((fsm *)); /* We're UP */
89 static void ipxcp_down __P((fsm *)); /* We're DOWN */
90 static void ipxcp_finished __P((fsm *)); /* Don't need lower layer */
91 static void ipxcp_script __P((fsm *, char *)); /* Run an up/down script */
92
93 fsm ipxcp_fsm[NUM_PPP]; /* IPXCP fsm structure */
94
95 static fsm_callbacks ipxcp_callbacks = { /* IPXCP callback routines */
96 ipxcp_resetci, /* Reset our Configuration Information */
97 ipxcp_cilen, /* Length of our Configuration Information */
98 ipxcp_addci, /* Add our Configuration Information */
99 ipxcp_ackci, /* ACK our Configuration Information */
100 ipxcp_nakci, /* NAK our Configuration Information */
101 ipxcp_rejci, /* Reject our Configuration Information */
102 ipxcp_reqci, /* Request peer's Configuration Information */
103 ipxcp_up, /* Called when fsm reaches OPENED state */
104 ipxcp_down, /* Called when fsm leaves OPENED state */
105 NULL, /* Called when we want the lower layer up */
106 ipxcp_finished, /* Called when we want the lower layer down */
107 NULL, /* Called when Protocol-Reject received */
108 NULL, /* Retransmission is necessary */
109 NULL, /* Called to handle protocol-specific codes */
110 "IPXCP" /* String name of protocol */
111 };
112
113 /*
114 * Command-line options.
115 */
116 static int setipxnode __P((char **));
117 static void printipxnode __P((option_t *,
118 void (*)(void *, char *, ...), void *));
119 static int setipxname __P((char **));
120
121 static option_t ipxcp_option_list[] = {
122 { "ipx", o_bool, &ipxcp_protent.enabled_flag,
123 "Enable IPXCP (and IPX)", OPT_PRIO | 1 },
124 { "+ipx", o_bool, &ipxcp_protent.enabled_flag,
125 "Enable IPXCP (and IPX)", OPT_PRIOSUB | OPT_ALIAS | 1 },
126 { "noipx", o_bool, &ipxcp_protent.enabled_flag,
127 "Disable IPXCP (and IPX)", OPT_PRIOSUB },
128 { "-ipx", o_bool, &ipxcp_protent.enabled_flag,
129 "Disable IPXCP (and IPX)", OPT_PRIOSUB | OPT_ALIAS },
130
131 { "ipx-network", o_uint32, &ipxcp_wantoptions[0].our_network,
132 "Set our IPX network number", OPT_PRIO, &ipxcp_wantoptions[0].neg_nn },
133
134 { "ipxcp-accept-network", o_bool, &ipxcp_wantoptions[0].accept_network,
135 "Accept peer IPX network number", 1,
136 &ipxcp_allowoptions[0].accept_network },
137
138 { "ipx-node", o_special, (void *)setipxnode,
139 "Set IPX node number", OPT_A2PRINTER, (void *)printipxnode },
140
141 { "ipxcp-accept-local", o_bool, &ipxcp_wantoptions[0].accept_local,
142 "Accept our IPX address", 1,
143 &ipxcp_allowoptions[0].accept_local },
144
145 { "ipxcp-accept-remote", o_bool, &ipxcp_wantoptions[0].accept_remote,
146 "Accept peer's IPX address", 1,
147 &ipxcp_allowoptions[0].accept_remote },
148
149 { "ipx-routing", o_int, &ipxcp_wantoptions[0].router,
150 "Set IPX routing proto number", OPT_PRIO,
151 &ipxcp_wantoptions[0].neg_router },
152
153 { "ipx-router-name", o_special, setipxname,
154 "Set IPX router name", OPT_PRIO | OPT_A2STRVAL | OPT_STATIC,
155 &ipxcp_wantoptions[0].name },
156
157 { "ipxcp-restart", o_int, &ipxcp_fsm[0].timeouttime,
158 "Set timeout for IPXCP", OPT_PRIO },
159 { "ipxcp-max-terminate", o_int, &ipxcp_fsm[0].maxtermtransmits,
160 "Set max #xmits for IPXCP term-reqs", OPT_PRIO },
161 { "ipxcp-max-configure", o_int, &ipxcp_fsm[0].maxconfreqtransmits,
162 "Set max #xmits for IPXCP conf-reqs", OPT_PRIO },
163 { "ipxcp-max-failure", o_int, &ipxcp_fsm[0].maxnakloops,
164 "Set max #conf-naks for IPXCP", OPT_PRIO },
165
166 { NULL }
167 };
168
169 /*
170 * Protocol entry points.
171 */
172
173 static void ipxcp_init __P((int));
174 static void ipxcp_open __P((int));
175 static void ipxcp_close __P((int, char *));
176 static void ipxcp_lowerup __P((int));
177 static void ipxcp_lowerdown __P((int));
178 static void ipxcp_input __P((int, u_char *, int));
179 static void ipxcp_protrej __P((int));
180 static int ipxcp_printpkt __P((u_char *, int,
181 void (*) __P((void *, char *, ...)), void *));
182
183 struct protent ipxcp_protent = {
184 PPP_IPXCP,
185 ipxcp_init,
186 ipxcp_input,
187 ipxcp_protrej,
188 ipxcp_lowerup,
189 ipxcp_lowerdown,
190 ipxcp_open,
191 ipxcp_close,
192 ipxcp_printpkt,
193 NULL,
194 0,
195 "IPXCP",
196 "IPX",
197 ipxcp_option_list,
198 NULL,
199 NULL,
200 NULL
201 };
202
203 /*
204 * Lengths of configuration options.
205 */
206
207 #define CILEN_VOID 2
208 #define CILEN_COMPLETE 2 /* length of complete option */
209 #define CILEN_NETN 6 /* network number length option */
210 #define CILEN_NODEN 8 /* node number length option */
211 #define CILEN_PROTOCOL 4 /* Minimum length of routing protocol */
212 #define CILEN_NAME 3 /* Minimum length of router name */
213 #define CILEN_COMPRESS 4 /* Minimum length of compression protocol */
214
215 #define CODENAME(x) ((x) == CONFACK ? "ACK" : \
216 (x) == CONFNAK ? "NAK" : "REJ")
217
218 static int ipxcp_is_up;
219
220 static char *ipx_ntoa __P((u_int32_t));
221
222 /* Used in printing the node number */
223 #define NODE(base) base[0], base[1], base[2], base[3], base[4], base[5]
224
225 /* Used to generate the proper bit mask */
226 #define BIT(num) (1 << (num))
227
228 /*
229 * Convert from internal to external notation
230 */
231
232 static short int
to_external(internal)233 to_external(internal)
234 short int internal;
235 {
236 short int external;
237
238 if (internal & BIT(IPX_NONE) )
239 external = IPX_NONE;
240 else
241 external = RIP_SAP;
242
243 return external;
244 }
245
246 /*
247 * Make a string representation of a network IP address.
248 */
249
250 static char *
ipx_ntoa(ipxaddr)251 ipx_ntoa(ipxaddr)
252 u_int32_t ipxaddr;
253 {
254 static char b[64];
255 slprintf(b, sizeof(b), "%x", ipxaddr);
256 return b;
257 }
258
259
260 static u_char *
setipxnodevalue(src,dst)261 setipxnodevalue(src,dst)
262 u_char *src, *dst;
263 {
264 int indx;
265 int item;
266
267 for (;;) {
268 if (!isxdigit (*src))
269 break;
270
271 for (indx = 0; indx < 5; ++indx) {
272 dst[indx] <<= 4;
273 dst[indx] |= (dst[indx + 1] >> 4) & 0x0F;
274 }
275
276 item = toupper (*src) - '0';
277 if (item > 9)
278 item -= 7;
279
280 dst[5] = (dst[5] << 4) | item;
281 ++src;
282 }
283 return src;
284 }
285
286 static int ipx_prio_our, ipx_prio_his;
287
288 static int
setipxnode(argv)289 setipxnode(argv)
290 char **argv;
291 {
292 char *end;
293 int have_his = 0;
294 u_char our_node[6];
295 u_char his_node[6];
296
297 memset (our_node, 0, 6);
298 memset (his_node, 0, 6);
299
300 end = setipxnodevalue (*argv, our_node);
301 if (*end == ':') {
302 have_his = 1;
303 end = setipxnodevalue (++end, his_node);
304 }
305
306 if (*end == '\0') {
307 ipxcp_wantoptions[0].neg_node = 1;
308 if (option_priority >= ipx_prio_our) {
309 memcpy(&ipxcp_wantoptions[0].our_node[0], our_node, 6);
310 ipx_prio_our = option_priority;
311 }
312 if (have_his && option_priority >= ipx_prio_his) {
313 memcpy(&ipxcp_wantoptions[0].his_node[0], his_node, 6);
314 ipx_prio_his = option_priority;
315 }
316 return 1;
317 }
318
319 option_error("invalid parameter '%s' for ipx-node option", *argv);
320 return 0;
321 }
322
323 static void
printipxnode(opt,printer,arg)324 printipxnode(opt, printer, arg)
325 option_t *opt;
326 void (*printer) __P((void *, char *, ...));
327 void *arg;
328 {
329 unsigned char *p;
330
331 p = ipxcp_wantoptions[0].our_node;
332 if (ipx_prio_our)
333 printer(arg, "%.2x%.2x%.2x%.2x%.2x%.2x",
334 p[0], p[1], p[2], p[3], p[4], p[5]);
335 printer(arg, ":");
336 p = ipxcp_wantoptions[0].his_node;
337 if (ipx_prio_his)
338 printer(arg, "%.2x%.2x%.2x%.2x%.2x%.2x",
339 p[0], p[1], p[2], p[3], p[4], p[5]);
340 }
341
342 static int
setipxname(argv)343 setipxname (argv)
344 char **argv;
345 {
346 char *dest = ipxcp_wantoptions[0].name;
347 char *src = *argv;
348 int count;
349 char ch;
350
351 ipxcp_wantoptions[0].neg_name = 1;
352 ipxcp_allowoptions[0].neg_name = 1;
353 memset (dest, '\0', sizeof (ipxcp_wantoptions[0].name));
354
355 count = 0;
356 while (*src) {
357 ch = *src++;
358 if (! isalnum (ch) && ch != '_') {
359 option_error("IPX router name must be alphanumeric or _");
360 return 0;
361 }
362
363 if (count >= sizeof (ipxcp_wantoptions[0].name) - 1) {
364 option_error("IPX router name is limited to %d characters",
365 sizeof (ipxcp_wantoptions[0].name) - 1);
366 return 0;
367 }
368
369 dest[count++] = toupper (ch);
370 }
371 dest[count] = 0;
372
373 return 1;
374 }
375
376 /*
377 * ipxcp_init - Initialize IPXCP.
378 */
379 static void
ipxcp_init(unit)380 ipxcp_init(unit)
381 int unit;
382 {
383 fsm *f = &ipxcp_fsm[unit];
384
385 f->unit = unit;
386 f->protocol = PPP_IPXCP;
387 f->callbacks = &ipxcp_callbacks;
388 fsm_init(&ipxcp_fsm[unit]);
389
390 memset (wo->name, 0, sizeof (wo->name));
391 memset (wo->our_node, 0, sizeof (wo->our_node));
392 memset (wo->his_node, 0, sizeof (wo->his_node));
393
394 wo->neg_nn = 1;
395 wo->neg_complete = 1;
396 wo->network = 0;
397
398 ao->neg_node = 1;
399 ao->neg_nn = 1;
400 ao->neg_name = 1;
401 ao->neg_complete = 1;
402 ao->neg_router = 1;
403
404 ao->accept_local = 0;
405 ao->accept_remote = 0;
406 ao->accept_network = 0;
407
408 wo->tried_rip = 0;
409 wo->tried_nlsp = 0;
410 }
411
412 /*
413 * Copy the node number
414 */
415
416 static void
copy_node(src,dst)417 copy_node (src, dst)
418 u_char *src, *dst;
419 {
420 memcpy (dst, src, sizeof (ipxcp_wantoptions[0].our_node));
421 }
422
423 /*
424 * Compare node numbers
425 */
426
427 static int
compare_node(src,dst)428 compare_node (src, dst)
429 u_char *src, *dst;
430 {
431 return memcmp (dst, src, sizeof (ipxcp_wantoptions[0].our_node)) == 0;
432 }
433
434 /*
435 * Is the node number zero?
436 */
437
438 static int
zero_node(node)439 zero_node (node)
440 u_char *node;
441 {
442 int indx;
443 for (indx = 0; indx < sizeof (ipxcp_wantoptions[0].our_node); ++indx)
444 if (node [indx] != 0)
445 return 0;
446 return 1;
447 }
448
449 /*
450 * Increment the node number
451 */
452
453 static void
inc_node(node)454 inc_node (node)
455 u_char *node;
456 {
457 u_char *outp;
458 u_int32_t magic_num;
459
460 outp = node;
461 magic_num = magic();
462 *outp++ = '\0';
463 *outp++ = '\0';
464 PUTLONG (magic_num, outp);
465 }
466
467 /*
468 * ipxcp_open - IPXCP is allowed to come up.
469 */
470 static void
ipxcp_open(unit)471 ipxcp_open(unit)
472 int unit;
473 {
474 fsm_open(&ipxcp_fsm[unit]);
475 }
476
477 /*
478 * ipxcp_close - Take IPXCP down.
479 */
480 static void
ipxcp_close(unit,reason)481 ipxcp_close(unit, reason)
482 int unit;
483 char *reason;
484 {
485 fsm_close(&ipxcp_fsm[unit], reason);
486 }
487
488
489 /*
490 * ipxcp_lowerup - The lower layer is up.
491 */
492 static void
ipxcp_lowerup(unit)493 ipxcp_lowerup(unit)
494 int unit;
495 {
496 fsm_lowerup(&ipxcp_fsm[unit]);
497 }
498
499
500 /*
501 * ipxcp_lowerdown - The lower layer is down.
502 */
503 static void
ipxcp_lowerdown(unit)504 ipxcp_lowerdown(unit)
505 int unit;
506 {
507 fsm_lowerdown(&ipxcp_fsm[unit]);
508 }
509
510
511 /*
512 * ipxcp_input - Input IPXCP packet.
513 */
514 static void
ipxcp_input(unit,p,len)515 ipxcp_input(unit, p, len)
516 int unit;
517 u_char *p;
518 int len;
519 {
520 fsm_input(&ipxcp_fsm[unit], p, len);
521 }
522
523
524 /*
525 * ipxcp_protrej - A Protocol-Reject was received for IPXCP.
526 *
527 * Pretend the lower layer went down, so we shut up.
528 */
529 static void
ipxcp_protrej(unit)530 ipxcp_protrej(unit)
531 int unit;
532 {
533 fsm_lowerdown(&ipxcp_fsm[unit]);
534 }
535
536
537 /*
538 * ipxcp_resetci - Reset our CI.
539 */
540 static void
ipxcp_resetci(f)541 ipxcp_resetci(f)
542 fsm *f;
543 {
544 wo->req_node = wo->neg_node && ao->neg_node;
545 wo->req_nn = wo->neg_nn && ao->neg_nn;
546
547 if (wo->our_network == 0) {
548 wo->neg_node = 1;
549 ao->accept_network = 1;
550 }
551 /*
552 * If our node number is zero then change it.
553 */
554 if (zero_node (wo->our_node)) {
555 inc_node (wo->our_node);
556 ao->accept_local = 1;
557 wo->neg_node = 1;
558 }
559 /*
560 * If his node number is zero then change it.
561 */
562 if (zero_node (wo->his_node)) {
563 inc_node (wo->his_node);
564 ao->accept_remote = 1;
565 }
566 /*
567 * If no routing agent was specified then we do RIP/SAP according to the
568 * RFC documents. If you have specified something then OK. Otherwise, we
569 * do RIP/SAP.
570 */
571 if (ao->router == 0) {
572 ao->router |= BIT(RIP_SAP);
573 wo->router |= BIT(RIP_SAP);
574 }
575
576 /* Always specify a routing protocol unless it was REJected. */
577 wo->neg_router = 1;
578 /*
579 * Start with these default values
580 */
581 *go = *wo;
582 }
583
584 /*
585 * ipxcp_cilen - Return length of our CI.
586 */
587
588 static int
ipxcp_cilen(f)589 ipxcp_cilen(f)
590 fsm *f;
591 {
592 int len;
593
594 len = go->neg_nn ? CILEN_NETN : 0;
595 len += go->neg_node ? CILEN_NODEN : 0;
596 len += go->neg_name ? CILEN_NAME + strlen (go->name) - 1 : 0;
597
598 /* RFC says that defaults should not be included. */
599 if (go->neg_router && to_external(go->router) != RIP_SAP)
600 len += CILEN_PROTOCOL;
601
602 return (len);
603 }
604
605
606 /*
607 * ipxcp_addci - Add our desired CIs to a packet.
608 */
609 static void
ipxcp_addci(f,ucp,lenp)610 ipxcp_addci(f, ucp, lenp)
611 fsm *f;
612 u_char *ucp;
613 int *lenp;
614 {
615 /*
616 * Add the options to the record.
617 */
618 if (go->neg_nn) {
619 PUTCHAR (IPX_NETWORK_NUMBER, ucp);
620 PUTCHAR (CILEN_NETN, ucp);
621 PUTLONG (go->our_network, ucp);
622 }
623
624 if (go->neg_node) {
625 int indx;
626 PUTCHAR (IPX_NODE_NUMBER, ucp);
627 PUTCHAR (CILEN_NODEN, ucp);
628 for (indx = 0; indx < sizeof (go->our_node); ++indx)
629 PUTCHAR (go->our_node[indx], ucp);
630 }
631
632 if (go->neg_name) {
633 int cilen = strlen (go->name);
634 int indx;
635 PUTCHAR (IPX_ROUTER_NAME, ucp);
636 PUTCHAR (CILEN_NAME + cilen - 1, ucp);
637 for (indx = 0; indx < cilen; ++indx)
638 PUTCHAR (go->name [indx], ucp);
639 }
640
641 if (go->neg_router) {
642 short external = to_external (go->router);
643 if (external != RIP_SAP) {
644 PUTCHAR (IPX_ROUTER_PROTOCOL, ucp);
645 PUTCHAR (CILEN_PROTOCOL, ucp);
646 PUTSHORT (external, ucp);
647 }
648 }
649 }
650
651 /*
652 * ipxcp_ackci - Ack our CIs.
653 *
654 * Returns:
655 * 0 - Ack was bad.
656 * 1 - Ack was good.
657 */
658 static int
ipxcp_ackci(f,p,len)659 ipxcp_ackci(f, p, len)
660 fsm *f;
661 u_char *p;
662 int len;
663 {
664 u_short cilen, citype, cishort;
665 u_char cichar;
666 u_int32_t cilong;
667
668 #define ACKCIVOID(opt, neg) \
669 if (neg) { \
670 if ((len -= CILEN_VOID) < 0) \
671 break; \
672 GETCHAR(citype, p); \
673 GETCHAR(cilen, p); \
674 if (cilen != CILEN_VOID || \
675 citype != opt) \
676 break; \
677 }
678
679 #define ACKCICOMPLETE(opt,neg) ACKCIVOID(opt, neg)
680
681 #define ACKCICHARS(opt, neg, val, cnt) \
682 if (neg) { \
683 int indx, count = cnt; \
684 len -= (count + 2); \
685 if (len < 0) \
686 break; \
687 GETCHAR(citype, p); \
688 GETCHAR(cilen, p); \
689 if (cilen != (count + 2) || \
690 citype != opt) \
691 break; \
692 for (indx = 0; indx < count; ++indx) {\
693 GETCHAR(cichar, p); \
694 if (cichar != ((u_char *) &val)[indx]) \
695 break; \
696 }\
697 if (indx != count) \
698 break; \
699 }
700
701 #define ACKCINODE(opt,neg,val) ACKCICHARS(opt,neg,val,sizeof(val))
702 #define ACKCINAME(opt,neg,val) ACKCICHARS(opt,neg,val,strlen(val))
703
704 #define ACKCINETWORK(opt, neg, val) \
705 if (neg) { \
706 if ((len -= CILEN_NETN) < 0) \
707 break; \
708 GETCHAR(citype, p); \
709 GETCHAR(cilen, p); \
710 if (cilen != CILEN_NETN || \
711 citype != opt) \
712 break; \
713 GETLONG(cilong, p); \
714 if (cilong != val) \
715 break; \
716 }
717
718 #define ACKCIPROTO(opt, neg, val) \
719 if (neg) { \
720 if (len < 2) \
721 break; \
722 GETCHAR(citype, p); \
723 GETCHAR(cilen, p); \
724 if (cilen != CILEN_PROTOCOL || citype != opt) \
725 break; \
726 len -= cilen; \
727 if (len < 0) \
728 break; \
729 GETSHORT(cishort, p); \
730 if (cishort != to_external (val) || cishort == RIP_SAP) \
731 break; \
732 }
733 /*
734 * Process the ACK frame in the order in which the frame was assembled
735 */
736 do {
737 ACKCINETWORK (IPX_NETWORK_NUMBER, go->neg_nn, go->our_network);
738 ACKCINODE (IPX_NODE_NUMBER, go->neg_node, go->our_node);
739 ACKCINAME (IPX_ROUTER_NAME, go->neg_name, go->name);
740 if (len > 0)
741 ACKCIPROTO (IPX_ROUTER_PROTOCOL, go->neg_router, go->router);
742 /*
743 * This is the end of the record.
744 */
745 if (len == 0)
746 return (1);
747 } while (0);
748 /*
749 * The frame is invalid
750 */
751 IPXCPDEBUG(("ipxcp_ackci: received bad Ack!"));
752 return (0);
753 }
754
755 /*
756 * ipxcp_nakci - Peer has sent a NAK for some of our CIs.
757 * This should not modify any state if the Nak is bad
758 * or if IPXCP is in the OPENED state.
759 *
760 * Returns:
761 * 0 - Nak was bad.
762 * 1 - Nak was good.
763 */
764
765 static int
ipxcp_nakci(f,p,len,treat_as_reject)766 ipxcp_nakci(f, p, len, treat_as_reject)
767 fsm *f;
768 u_char *p;
769 int len;
770 int treat_as_reject;
771 {
772 u_char citype, cilen, *next;
773 u_short s;
774 u_int32_t l;
775 ipxcp_options no; /* options we've seen Naks for */
776 ipxcp_options try; /* options to request next time */
777
778 BZERO(&no, sizeof(no));
779 try = *go;
780
781 while (len >= CILEN_VOID) {
782 GETCHAR (citype, p);
783 GETCHAR (cilen, p);
784 len -= cilen;
785 if (cilen < CILEN_VOID || len < 0)
786 goto bad;
787 next = &p [cilen - CILEN_VOID];
788
789 switch (citype) {
790 case IPX_NETWORK_NUMBER:
791 if (!go->neg_nn || no.neg_nn || (cilen != CILEN_NETN))
792 goto bad;
793 no.neg_nn = 1;
794
795 GETLONG(l, p);
796 if (treat_as_reject)
797 try.neg_nn = 0;
798 else if (l && ao->accept_network)
799 try.our_network = l;
800 break;
801
802 case IPX_NODE_NUMBER:
803 if (!go->neg_node || no.neg_node || (cilen != CILEN_NODEN))
804 goto bad;
805 no.neg_node = 1;
806
807 if (treat_as_reject)
808 try.neg_node = 0;
809 else if (!zero_node (p) && ao->accept_local &&
810 ! compare_node (p, ho->his_node))
811 copy_node (p, try.our_node);
812 break;
813
814 /* This has never been sent. Ignore the NAK frame */
815 case IPX_COMPRESSION_PROTOCOL:
816 goto bad;
817
818 case IPX_ROUTER_PROTOCOL:
819 if (!go->neg_router || (cilen < CILEN_PROTOCOL))
820 goto bad;
821
822 GETSHORT (s, p);
823 if (s > 15) /* This is just bad, but ignore for now. */
824 break;
825
826 s = BIT(s);
827 if (no.router & s) /* duplicate NAKs are always bad */
828 goto bad;
829
830 if (no.router == 0) /* Reset on first NAK only */
831 try.router = 0;
832
833 no.router |= s;
834 try.router |= s;
835 try.neg_router = 1;
836 break;
837
838 /* These, according to the RFC, must never be NAKed. */
839 case IPX_ROUTER_NAME:
840 case IPX_COMPLETE:
841 goto bad;
842
843 /* These are for options which we have not seen. */
844 default:
845 break;
846 }
847 p = next;
848 }
849
850 /*
851 * Do not permit the peer to force a router protocol which we do not
852 * support. However, default to the condition that will accept "NONE".
853 */
854 try.router &= (ao->router | BIT(IPX_NONE));
855 if (try.router == 0 && ao->router != 0)
856 try.router = BIT(IPX_NONE);
857
858 if (try.router != 0)
859 try.neg_router = 1;
860
861 /*
862 * OK, the Nak is good. Now we can update state.
863 * If there are any options left, we ignore them.
864 */
865 if (f->state != OPENED)
866 *go = try;
867
868 return 1;
869
870 bad:
871 IPXCPDEBUG(("ipxcp_nakci: received bad Nak!"));
872 return 0;
873 }
874
875 /*
876 * ipxcp_rejci - Reject some of our CIs.
877 */
878 static int
ipxcp_rejci(f,p,len)879 ipxcp_rejci(f, p, len)
880 fsm *f;
881 u_char *p;
882 int len;
883 {
884 u_short cilen, citype, cishort;
885 u_char cichar;
886 u_int32_t cilong;
887 ipxcp_options try; /* options to request next time */
888
889 #define REJCINETWORK(opt, neg, val) \
890 if (neg && p[0] == opt) { \
891 if ((len -= CILEN_NETN) < 0) \
892 break; \
893 GETCHAR(citype, p); \
894 GETCHAR(cilen, p); \
895 if (cilen != CILEN_NETN || \
896 citype != opt) \
897 break; \
898 GETLONG(cilong, p); \
899 if (cilong != val) \
900 break; \
901 neg = 0; \
902 }
903
904 #define REJCICHARS(opt, neg, val, cnt) \
905 if (neg && p[0] == opt) { \
906 int indx, count = cnt; \
907 len -= (count + 2); \
908 if (len < 0) \
909 break; \
910 GETCHAR(citype, p); \
911 GETCHAR(cilen, p); \
912 if (cilen != (count + 2) || \
913 citype != opt) \
914 break; \
915 for (indx = 0; indx < count; ++indx) {\
916 GETCHAR(cichar, p); \
917 if (cichar != ((u_char *) &val)[indx]) \
918 break; \
919 }\
920 if (indx != count) \
921 break; \
922 neg = 0; \
923 }
924
925 #define REJCINODE(opt,neg,val) REJCICHARS(opt,neg,val,sizeof(val))
926 #define REJCINAME(opt,neg,val) REJCICHARS(opt,neg,val,strlen(val))
927
928 #define REJCIVOID(opt, neg) \
929 if (neg && p[0] == opt) { \
930 if ((len -= CILEN_VOID) < 0) \
931 break; \
932 GETCHAR(citype, p); \
933 GETCHAR(cilen, p); \
934 if (cilen != CILEN_VOID || citype != opt) \
935 break; \
936 neg = 0; \
937 }
938
939 /* a reject for RIP/SAP is invalid since we don't send it and you can't
940 reject something which is not sent. (You can NAK, but you can't REJ.) */
941 #define REJCIPROTO(opt, neg, val, bit) \
942 if (neg && p[0] == opt) { \
943 if ((len -= CILEN_PROTOCOL) < 0) \
944 break; \
945 GETCHAR(citype, p); \
946 GETCHAR(cilen, p); \
947 if (cilen != CILEN_PROTOCOL) \
948 break; \
949 GETSHORT(cishort, p); \
950 if (cishort != to_external (val) || cishort == RIP_SAP) \
951 break; \
952 neg = 0; \
953 }
954 /*
955 * Any Rejected CIs must be in exactly the same order that we sent.
956 * Check packet length and CI length at each step.
957 * If we find any deviations, then this packet is bad.
958 */
959 try = *go;
960
961 do {
962 REJCINETWORK (IPX_NETWORK_NUMBER, try.neg_nn, try.our_network);
963 REJCINODE (IPX_NODE_NUMBER, try.neg_node, try.our_node);
964 REJCINAME (IPX_ROUTER_NAME, try.neg_name, try.name);
965 REJCIPROTO (IPX_ROUTER_PROTOCOL, try.neg_router, try.router, 0);
966 /*
967 * This is the end of the record.
968 */
969 if (len == 0) {
970 if (f->state != OPENED)
971 *go = try;
972 return (1);
973 }
974 } while (0);
975 /*
976 * The frame is invalid at this point.
977 */
978 IPXCPDEBUG(("ipxcp_rejci: received bad Reject!"));
979 return 0;
980 }
981
982 /*
983 * ipxcp_reqci - Check the peer's requested CIs and send appropriate response.
984 *
985 * Returns: CONFACK, CONFNAK or CONFREJ and input packet modified
986 * appropriately. If reject_if_disagree is non-zero, doesn't return
987 * CONFNAK; returns CONFREJ if it can't return CONFACK.
988 */
989 static int
ipxcp_reqci(f,inp,len,reject_if_disagree)990 ipxcp_reqci(f, inp, len, reject_if_disagree)
991 fsm *f;
992 u_char *inp; /* Requested CIs */
993 int *len; /* Length of requested CIs */
994 int reject_if_disagree;
995 {
996 u_char *cip, *next; /* Pointer to current and next CIs */
997 u_short cilen, citype; /* Parsed len, type */
998 u_short cishort; /* Parsed short value */
999 u_int32_t cinetwork; /* Parsed address values */
1000 int rc = CONFACK; /* Final packet return code */
1001 int orc; /* Individual option return code */
1002 u_char *p; /* Pointer to next char to parse */
1003 u_char *ucp = inp; /* Pointer to current output char */
1004 int l = *len; /* Length left */
1005
1006 /*
1007 * Reset all his options.
1008 */
1009 BZERO(ho, sizeof(*ho));
1010
1011 /*
1012 * Process all his options.
1013 */
1014 next = inp;
1015 while (l) {
1016 orc = CONFACK; /* Assume success */
1017 cip = p = next; /* Remember begining of CI */
1018 if (l < 2 || /* Not enough data for CI header or */
1019 p[1] < 2 || /* CI length too small or */
1020 p[1] > l) { /* CI length too big? */
1021 IPXCPDEBUG(("ipxcp_reqci: bad CI length!"));
1022 orc = CONFREJ; /* Reject bad CI */
1023 cilen = l; /* Reject till end of packet */
1024 l = 0; /* Don't loop again */
1025 goto endswitch;
1026 }
1027 GETCHAR(citype, p); /* Parse CI type */
1028 GETCHAR(cilen, p); /* Parse CI length */
1029 l -= cilen; /* Adjust remaining length */
1030 next += cilen; /* Step to next CI */
1031
1032 switch (citype) { /* Check CI type */
1033 /*
1034 * The network number must match. Choose the larger of the two.
1035 */
1036 case IPX_NETWORK_NUMBER:
1037 /* if we wont negotiate the network number or the length is wrong
1038 then reject the option */
1039 if ( !ao->neg_nn || cilen != CILEN_NETN ) {
1040 orc = CONFREJ;
1041 break;
1042 }
1043 GETLONG(cinetwork, p);
1044
1045 /* If the network numbers match then acknowledge them. */
1046 if (cinetwork != 0) {
1047 ho->his_network = cinetwork;
1048 ho->neg_nn = 1;
1049 if (wo->our_network == cinetwork)
1050 break;
1051 /*
1052 * If the network number is not given or we don't accept their change or
1053 * the network number is too small then NAK it.
1054 */
1055 if (! ao->accept_network || cinetwork < wo->our_network) {
1056 DECPTR (sizeof (u_int32_t), p);
1057 PUTLONG (wo->our_network, p);
1058 orc = CONFNAK;
1059 }
1060 break;
1061 }
1062 /*
1063 * The peer sent '0' for the network. Give it ours if we have one.
1064 */
1065 if (go->our_network != 0) {
1066 DECPTR (sizeof (u_int32_t), p);
1067 PUTLONG (wo->our_network, p);
1068 orc = CONFNAK;
1069 /*
1070 * We don't have one. Reject the value.
1071 */
1072 } else
1073 orc = CONFREJ;
1074
1075 break;
1076 /*
1077 * The node number is required
1078 */
1079 case IPX_NODE_NUMBER:
1080 /* if we wont negotiate the node number or the length is wrong
1081 then reject the option */
1082 if ( cilen != CILEN_NODEN ) {
1083 orc = CONFREJ;
1084 break;
1085 }
1086
1087 copy_node (p, ho->his_node);
1088 ho->neg_node = 1;
1089 /*
1090 * If the remote does not have a number and we do then NAK it with the value
1091 * which we have for it. (We never have a default value of zero.)
1092 */
1093 if (zero_node (ho->his_node)) {
1094 orc = CONFNAK;
1095 copy_node (wo->his_node, p);
1096 INCPTR (sizeof (wo->his_node), p);
1097 break;
1098 }
1099 /*
1100 * If you have given me the expected network node number then I'll accept
1101 * it now.
1102 */
1103 if (compare_node (wo->his_node, ho->his_node)) {
1104 orc = CONFACK;
1105 ho->neg_node = 1;
1106 INCPTR (sizeof (wo->his_node), p);
1107 break;
1108 }
1109 /*
1110 * If his node number is the same as ours then ask him to try the next
1111 * value.
1112 */
1113 if (compare_node (ho->his_node, go->our_node)) {
1114 inc_node (ho->his_node);
1115 orc = CONFNAK;
1116 copy_node (ho->his_node, p);
1117 INCPTR (sizeof (wo->his_node), p);
1118 break;
1119 }
1120 /*
1121 * If we don't accept a new value then NAK it.
1122 */
1123 if (! ao->accept_remote) {
1124 copy_node (wo->his_node, p);
1125 INCPTR (sizeof (wo->his_node), p);
1126 orc = CONFNAK;
1127 break;
1128 }
1129 orc = CONFACK;
1130 ho->neg_node = 1;
1131 INCPTR (sizeof (wo->his_node), p);
1132 break;
1133 /*
1134 * Compression is not desired at this time. It is always rejected.
1135 */
1136 case IPX_COMPRESSION_PROTOCOL:
1137 orc = CONFREJ;
1138 break;
1139 /*
1140 * The routing protocol is a bitmask of various types. Any combination
1141 * of the values RIP_SAP and NLSP are permissible. 'IPX_NONE' for no
1142 * routing protocol must be specified only once.
1143 */
1144 case IPX_ROUTER_PROTOCOL:
1145 if ( !ao->neg_router || cilen < CILEN_PROTOCOL ) {
1146 orc = CONFREJ;
1147 break;
1148 }
1149
1150 GETSHORT (cishort, p);
1151
1152 if (wo->neg_router == 0) {
1153 wo->neg_router = 1;
1154 wo->router = BIT(IPX_NONE);
1155 }
1156
1157 if ((cishort == IPX_NONE && ho->router != 0) ||
1158 (ho->router & BIT(IPX_NONE))) {
1159 orc = CONFREJ;
1160 break;
1161 }
1162
1163 cishort = BIT(cishort);
1164 if (ho->router & cishort) {
1165 orc = CONFREJ;
1166 break;
1167 }
1168
1169 ho->router |= cishort;
1170 ho->neg_router = 1;
1171
1172 /* Finally do not allow a router protocol which we do not
1173 support. */
1174
1175 if ((cishort & (ao->router | BIT(IPX_NONE))) == 0) {
1176 int protocol;
1177
1178 if (cishort == BIT(NLSP) &&
1179 (ao->router & BIT(RIP_SAP)) &&
1180 !wo->tried_rip) {
1181 protocol = RIP_SAP;
1182 wo->tried_rip = 1;
1183 } else
1184 protocol = IPX_NONE;
1185
1186 DECPTR (sizeof (u_int16_t), p);
1187 PUTSHORT (protocol, p);
1188 orc = CONFNAK;
1189 }
1190 break;
1191 /*
1192 * The router name is advisorary. Just accept it if it is not too large.
1193 */
1194 case IPX_ROUTER_NAME:
1195 if (cilen >= CILEN_NAME) {
1196 int name_size = cilen - CILEN_NAME;
1197 if (name_size > sizeof (ho->name))
1198 name_size = sizeof (ho->name) - 1;
1199 memset (ho->name, 0, sizeof (ho->name));
1200 memcpy (ho->name, p, name_size);
1201 ho->name [name_size] = '\0';
1202 ho->neg_name = 1;
1203 orc = CONFACK;
1204 break;
1205 }
1206 orc = CONFREJ;
1207 break;
1208 /*
1209 * This is advisorary.
1210 */
1211 case IPX_COMPLETE:
1212 if (cilen != CILEN_COMPLETE)
1213 orc = CONFREJ;
1214 else {
1215 ho->neg_complete = 1;
1216 orc = CONFACK;
1217 }
1218 break;
1219 /*
1220 * All other entries are not known at this time.
1221 */
1222 default:
1223 orc = CONFREJ;
1224 break;
1225 }
1226 endswitch:
1227 if (orc == CONFACK && /* Good CI */
1228 rc != CONFACK) /* but prior CI wasnt? */
1229 continue; /* Don't send this one */
1230
1231 if (orc == CONFNAK) { /* Nak this CI? */
1232 if (reject_if_disagree) /* Getting fed up with sending NAKs? */
1233 orc = CONFREJ; /* Get tough if so */
1234 if (rc == CONFREJ) /* Rejecting prior CI? */
1235 continue; /* Don't send this one */
1236 if (rc == CONFACK) { /* Ack'd all prior CIs? */
1237 rc = CONFNAK; /* Not anymore... */
1238 ucp = inp; /* Backup */
1239 }
1240 }
1241
1242 if (orc == CONFREJ && /* Reject this CI */
1243 rc != CONFREJ) { /* but no prior ones? */
1244 rc = CONFREJ;
1245 ucp = inp; /* Backup */
1246 }
1247
1248 /* Need to move CI? */
1249 if (ucp != cip)
1250 BCOPY(cip, ucp, cilen); /* Move it */
1251
1252 /* Update output pointer */
1253 INCPTR(cilen, ucp);
1254 }
1255
1256 /*
1257 * If we aren't rejecting this packet, and we want to negotiate
1258 * their address, and they didn't send their address, then we
1259 * send a NAK with a IPX_NODE_NUMBER option appended. We assume the
1260 * input buffer is long enough that we can append the extra
1261 * option safely.
1262 */
1263
1264 if (rc != CONFREJ && !ho->neg_node &&
1265 wo->req_nn && !reject_if_disagree) {
1266 if (rc == CONFACK) {
1267 rc = CONFNAK;
1268 wo->req_nn = 0; /* don't ask again */
1269 ucp = inp; /* reset pointer */
1270 }
1271
1272 if (zero_node (wo->his_node))
1273 inc_node (wo->his_node);
1274
1275 PUTCHAR (IPX_NODE_NUMBER, ucp);
1276 PUTCHAR (CILEN_NODEN, ucp);
1277 copy_node (wo->his_node, ucp);
1278 INCPTR (sizeof (wo->his_node), ucp);
1279 }
1280
1281 *len = ucp - inp; /* Compute output length */
1282 IPXCPDEBUG(("ipxcp: returning Configure-%s", CODENAME(rc)));
1283 return (rc); /* Return final code */
1284 }
1285
1286 /*
1287 * ipxcp_up - IPXCP has come UP.
1288 *
1289 * Configure the IP network interface appropriately and bring it up.
1290 */
1291
1292 static void
ipxcp_up(f)1293 ipxcp_up(f)
1294 fsm *f;
1295 {
1296 int unit = f->unit;
1297
1298 IPXCPDEBUG(("ipxcp: up"));
1299
1300 /* The default router protocol is RIP/SAP. */
1301 if (ho->router == 0)
1302 ho->router = BIT(RIP_SAP);
1303
1304 if (go->router == 0)
1305 go->router = BIT(RIP_SAP);
1306
1307 /* Fetch the network number */
1308 if (!ho->neg_nn)
1309 ho->his_network = wo->his_network;
1310
1311 if (!ho->neg_node)
1312 copy_node (wo->his_node, ho->his_node);
1313
1314 if (!wo->neg_node && !go->neg_node)
1315 copy_node (wo->our_node, go->our_node);
1316
1317 if (zero_node (go->our_node)) {
1318 static char errmsg[] = "Could not determine local IPX node address";
1319 if (debug)
1320 error(errmsg);
1321 ipxcp_close(f->unit, errmsg);
1322 return;
1323 }
1324
1325 go->network = go->our_network;
1326 if (ho->his_network != 0 && ho->his_network > go->network)
1327 go->network = ho->his_network;
1328
1329 if (go->network == 0) {
1330 static char errmsg[] = "Can not determine network number";
1331 if (debug)
1332 error(errmsg);
1333 ipxcp_close (unit, errmsg);
1334 return;
1335 }
1336
1337 /* bring the interface up */
1338 if (!sifup(unit)) {
1339 if (debug)
1340 warn("sifup failed (IPX)");
1341 ipxcp_close(unit, "Interface configuration failed");
1342 return;
1343 }
1344 ipxcp_is_up = 1;
1345
1346 /* set the network number for IPX */
1347 if (!sipxfaddr(unit, go->network, go->our_node)) {
1348 if (debug)
1349 warn("sipxfaddr failed");
1350 ipxcp_close(unit, "Interface configuration failed");
1351 return;
1352 }
1353
1354 np_up(f->unit, PPP_IPX);
1355
1356 /*
1357 * Execute the ipx-up script, like this:
1358 * /etc/ppp/ipx-up interface tty speed local-IPX remote-IPX
1359 */
1360
1361 ipxcp_script (f, _PATH_IPXUP);
1362 }
1363
1364 /*
1365 * ipxcp_down - IPXCP has gone DOWN.
1366 *
1367 * Take the IP network interface down, clear its addresses
1368 * and delete routes through it.
1369 */
1370
1371 static void
ipxcp_down(f)1372 ipxcp_down(f)
1373 fsm *f;
1374 {
1375 IPXCPDEBUG(("ipxcp: down"));
1376
1377 if (!ipxcp_is_up)
1378 return;
1379 ipxcp_is_up = 0;
1380 np_down(f->unit, PPP_IPX);
1381 cipxfaddr(f->unit);
1382 sifnpmode(f->unit, PPP_IPX, NPMODE_DROP);
1383 sifdown(f->unit);
1384 ipxcp_script (f, _PATH_IPXDOWN);
1385 }
1386
1387
1388 /*
1389 * ipxcp_finished - possibly shut down the lower layers.
1390 */
1391 static void
ipxcp_finished(f)1392 ipxcp_finished(f)
1393 fsm *f;
1394 {
1395 np_finished(f->unit, PPP_IPX);
1396 }
1397
1398
1399 /*
1400 * ipxcp_script - Execute a script with arguments
1401 * interface-name tty-name speed local-IPX remote-IPX networks.
1402 */
1403 static void
ipxcp_script(f,script)1404 ipxcp_script(f, script)
1405 fsm *f;
1406 char *script;
1407 {
1408 char strspeed[32], strlocal[32], strremote[32];
1409 char strnetwork[32], strpid[32];
1410 char *argv[14], strproto_lcl[32], strproto_rmt[32];
1411
1412 slprintf(strpid, sizeof(strpid), "%d", getpid());
1413 slprintf(strspeed, sizeof(strspeed),"%d", baud_rate);
1414
1415 strproto_lcl[0] = '\0';
1416 if (go->neg_router && ((go->router & BIT(IPX_NONE)) == 0)) {
1417 if (go->router & BIT(RIP_SAP))
1418 strlcpy (strproto_lcl, "RIP ", sizeof(strproto_lcl));
1419 if (go->router & BIT(NLSP))
1420 strlcat (strproto_lcl, "NLSP ", sizeof(strproto_lcl));
1421 }
1422
1423 if (strproto_lcl[0] == '\0')
1424 strlcpy (strproto_lcl, "NONE ", sizeof(strproto_lcl));
1425
1426 strproto_lcl[strlen (strproto_lcl)-1] = '\0';
1427
1428 strproto_rmt[0] = '\0';
1429 if (ho->neg_router && ((ho->router & BIT(IPX_NONE)) == 0)) {
1430 if (ho->router & BIT(RIP_SAP))
1431 strlcpy (strproto_rmt, "RIP ", sizeof(strproto_rmt));
1432 if (ho->router & BIT(NLSP))
1433 strlcat (strproto_rmt, "NLSP ", sizeof(strproto_rmt));
1434 }
1435
1436 if (strproto_rmt[0] == '\0')
1437 strlcpy (strproto_rmt, "NONE ", sizeof(strproto_rmt));
1438
1439 strproto_rmt[strlen (strproto_rmt)-1] = '\0';
1440
1441 strlcpy (strnetwork, ipx_ntoa (go->network), sizeof(strnetwork));
1442
1443 slprintf (strlocal, sizeof(strlocal), "%0.6B", go->our_node);
1444
1445 slprintf (strremote, sizeof(strremote), "%0.6B", ho->his_node);
1446
1447 argv[0] = script;
1448 argv[1] = ifname;
1449 argv[2] = devnam;
1450 argv[3] = strspeed;
1451 argv[4] = strnetwork;
1452 argv[5] = strlocal;
1453 argv[6] = strremote;
1454 argv[7] = strproto_lcl;
1455 argv[8] = strproto_rmt;
1456 argv[9] = go->name;
1457 argv[10] = ho->name;
1458 argv[11] = ipparam;
1459 argv[12] = strpid;
1460 argv[13] = NULL;
1461 run_program(script, argv, 0, NULL, NULL);
1462 }
1463
1464 /*
1465 * ipxcp_printpkt - print the contents of an IPXCP packet.
1466 */
1467 static char *ipxcp_codenames[] = {
1468 "ConfReq", "ConfAck", "ConfNak", "ConfRej",
1469 "TermReq", "TermAck", "CodeRej"
1470 };
1471
1472 static int
ipxcp_printpkt(p,plen,printer,arg)1473 ipxcp_printpkt(p, plen, printer, arg)
1474 u_char *p;
1475 int plen;
1476 void (*printer) __P((void *, char *, ...));
1477 void *arg;
1478 {
1479 int code, id, len, olen;
1480 u_char *pstart, *optend;
1481 u_short cishort;
1482 u_int32_t cilong;
1483
1484 if (plen < HEADERLEN)
1485 return 0;
1486 pstart = p;
1487 GETCHAR(code, p);
1488 GETCHAR(id, p);
1489 GETSHORT(len, p);
1490 if (len < HEADERLEN || len > plen)
1491 return 0;
1492
1493 if (code >= 1 && code <= sizeof(ipxcp_codenames) / sizeof(char *))
1494 printer(arg, " %s", ipxcp_codenames[code-1]);
1495 else
1496 printer(arg, " code=0x%x", code);
1497 printer(arg, " id=0x%x", id);
1498 len -= HEADERLEN;
1499 switch (code) {
1500 case CONFREQ:
1501 case CONFACK:
1502 case CONFNAK:
1503 case CONFREJ:
1504 /* print option list */
1505 while (len >= 2) {
1506 GETCHAR(code, p);
1507 GETCHAR(olen, p);
1508 p -= 2;
1509 if (olen < CILEN_VOID || olen > len) {
1510 break;
1511 }
1512 printer(arg, " <");
1513 len -= olen;
1514 optend = p + olen;
1515 switch (code) {
1516 case IPX_NETWORK_NUMBER:
1517 if (olen == CILEN_NETN) {
1518 p += 2;
1519 GETLONG(cilong, p);
1520 printer (arg, "network %s", ipx_ntoa (cilong));
1521 }
1522 break;
1523 case IPX_NODE_NUMBER:
1524 if (olen == CILEN_NODEN) {
1525 p += 2;
1526 printer (arg, "node ");
1527 while (p < optend) {
1528 GETCHAR(code, p);
1529 printer(arg, "%.2x", (int) (unsigned int) (unsigned char) code);
1530 }
1531 }
1532 break;
1533 case IPX_COMPRESSION_PROTOCOL:
1534 if (olen == CILEN_COMPRESS) {
1535 p += 2;
1536 GETSHORT (cishort, p);
1537 printer (arg, "compression %d", (int) cishort);
1538 }
1539 break;
1540 case IPX_ROUTER_PROTOCOL:
1541 if (olen == CILEN_PROTOCOL) {
1542 p += 2;
1543 GETSHORT (cishort, p);
1544 printer (arg, "router proto %d", (int) cishort);
1545 }
1546 break;
1547 case IPX_ROUTER_NAME:
1548 if (olen >= CILEN_NAME) {
1549 p += 2;
1550 printer (arg, "router name \"");
1551 while (p < optend) {
1552 GETCHAR(code, p);
1553 if (code >= 0x20 && code <= 0x7E)
1554 printer (arg, "%c", (int) (unsigned int) (unsigned char) code);
1555 else
1556 printer (arg, " \\%.2x", (int) (unsigned int) (unsigned char) code);
1557 }
1558 printer (arg, "\"");
1559 }
1560 break;
1561 case IPX_COMPLETE:
1562 if (olen == CILEN_COMPLETE) {
1563 p += 2;
1564 printer (arg, "complete");
1565 }
1566 break;
1567 default:
1568 break;
1569 }
1570
1571 while (p < optend) {
1572 GETCHAR(code, p);
1573 printer(arg, " %.2x", (int) (unsigned int) (unsigned char) code);
1574 }
1575 printer(arg, ">");
1576 }
1577 break;
1578
1579 case TERMACK:
1580 case TERMREQ:
1581 if (len > 0 && *p >= ' ' && *p < 0x7f) {
1582 printer(arg, " ");
1583 print_string(p, len, printer, arg);
1584 p += len;
1585 len = 0;
1586 }
1587 break;
1588 }
1589
1590 /* print the rest of the bytes in the packet */
1591 for (; len > 0; --len) {
1592 GETCHAR(code, p);
1593 printer(arg, " %.2x", (int) (unsigned int) (unsigned char) code);
1594 }
1595
1596 return p - pstart;
1597 }
1598 #endif /* ifdef IPX_CHANGE */
1599