release/src/router/ppp/pppd/ipxcp.c

   1 /*
   2  * ipxcp.c - PPP IPX Control Protocol.
   3  *
   4  * Copyright (c) 1989 Carnegie Mellon University.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms are permitted
   8  * provided that the above copyright notice and this paragraph are
   9  * duplicated in all such forms and that any documentation,
  10  * advertising materials, and other materials related to such
  11  * distribution and use acknowledge that the software was developed
  12  * by Carnegie Mellon University.  The name of the
  13  * University may not be used to endorse or promote products derived
  14  * from this software without specific prior written permission.
  15  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
  16  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  17  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  18  */
  19
  20 #ifdef IPX_CHANGE
  21
  22 #define RCSID   "$Id: ipxcp.c,v 1.1.1.4 2003/10/14 08:09:53 sparq Exp $"
  23
  24 /*
  25  * TODO:
  26  */
  27
  28 #include <stdio.h>
  29 #include <string.h>
  30 #include <unistd.h>
  31 #include <ctype.h>
  32 #include <sys/types.h>
  33 #include <sys/socket.h>
  34 #include <netinet/in.h>
  35
  36 #include "pppd.h"
  37 #include "fsm.h"
  38 #include "ipxcp.h"
  39 #include "pathnames.h"
  40 #include "magic.h"
  41
  42 static const char rcsid[] = RCSID;
  43
  44 /* global vars */
  45 ipxcp_options ipxcp_wantoptions[NUM_PPP];       /* Options that we want to request */
  46 ipxcp_options ipxcp_gotoptions[NUM_PPP];        /* Options that peer ack'd */
  47 ipxcp_options ipxcp_allowoptions[NUM_PPP];      /* Options we allow peer to request */
  48 ipxcp_options ipxcp_hisoptions[NUM_PPP];        /* Options that we ack'd */
  49
  50 #define wo (&ipxcp_wantoptions[0])
  51 #define ao (&ipxcp_allowoptions[0])
  52 #define go (&ipxcp_gotoptions[0])
  53 #define ho (&ipxcp_hisoptions[0])
  54
  55 /*
  56  * Callbacks for fsm code.  (CI = Configuration Information)
  57  */
  58 static void ipxcp_resetci __P((fsm *)); /* Reset our CI */
  59 static int  ipxcp_cilen __P((fsm *));           /* Return length of our CI */
  60 static void ipxcp_addci __P((fsm *, u_char *, int *)); /* Add our CI */
  61 static int  ipxcp_ackci __P((fsm *, u_char *, int));    /* Peer ack'd our CI */
  62 static int  ipxcp_nakci __P((fsm *, u_char *, int));    /* Peer nak'd our CI */
  63 static int  ipxcp_rejci __P((fsm *, u_char *, int));    /* Peer rej'd our CI */
  64 static int  ipxcp_reqci __P((fsm *, u_char *, int *, int)); /* Rcv CI */
  65 static void ipxcp_up __P((fsm *));              /* We're UP */
  66 static void ipxcp_down __P((fsm *));            /* We're DOWN */
  67 static void ipxcp_finished __P((fsm *));        /* Don't need lower layer */
  68 static void ipxcp_script __P((fsm *, char *)); /* Run an up/down script */
  69
  70 fsm ipxcp_fsm[NUM_PPP];         /* IPXCP fsm structure */
  71
  72 static fsm_callbacks ipxcp_callbacks = { /* IPXCP callback routines */
  73     ipxcp_resetci,              /* Reset our Configuration Information */
  74     ipxcp_cilen,                /* Length of our Configuration Information */
  75     ipxcp_addci,                /* Add our Configuration Information */
  76     ipxcp_ackci,                /* ACK our Configuration Information */
  77     ipxcp_nakci,                /* NAK our Configuration Information */
  78     ipxcp_rejci,                /* Reject our Configuration Information */
  79     ipxcp_reqci,                /* Request peer's Configuration Information */
  80     ipxcp_up,                   /* Called when fsm reaches OPENED state */
  81     ipxcp_down,                 /* Called when fsm leaves OPENED state */
  82     NULL,                       /* Called when we want the lower layer up */
  83     ipxcp_finished,             /* Called when we want the lower layer down */
  84     NULL,                       /* Called when Protocol-Reject received */
  85     NULL,                       /* Retransmission is necessary */
  86     NULL,                       /* Called to handle protocol-specific codes */
  87     "IPXCP"                     /* String name of protocol */
  88 };
  89
  90 /*
  91  * Command-line options.
  92  */
  93 static int setipxnode __P((char **));
  94 static void printipxnode __P((option_t *,
  95                               void (*)(void *, char *, ...), void *));
  96 static int setipxname __P((char **));
  97
  98 static option_t ipxcp_option_list[] = {
  99     { "ipx", o_bool, &ipxcp_protent.enabled_flag,
 100       "Enable IPXCP (and IPX)", OPT_PRIO | 1 },
 101     { "+ipx", o_bool, &ipxcp_protent.enabled_flag,
 102       "Enable IPXCP (and IPX)", OPT_PRIOSUB | OPT_ALIAS | 1 },
 103     { "noipx", o_bool, &ipxcp_protent.enabled_flag,
 104       "Disable IPXCP (and IPX)", OPT_PRIOSUB },
 105     { "-ipx", o_bool, &ipxcp_protent.enabled_flag,
 106       "Disable IPXCP (and IPX)", OPT_PRIOSUB | OPT_ALIAS },
 107
 108     { "ipx-network", o_uint32, &ipxcp_wantoptions[0].our_network,
 109       "Set our IPX network number", OPT_PRIO, &ipxcp_wantoptions[0].neg_nn },
 110
 111     { "ipxcp-accept-network", o_bool, &ipxcp_wantoptions[0].accept_network,
 112       "Accept peer IPX network number", 1,
 113       &ipxcp_allowoptions[0].accept_network },
 114
 115     { "ipx-node", o_special, (void *)setipxnode,
 116       "Set IPX node number", OPT_A2PRINTER, (void *)printipxnode },
 117
 118     { "ipxcp-accept-local", o_bool, &ipxcp_wantoptions[0].accept_local,
 119       "Accept our IPX address", 1,
 120       &ipxcp_allowoptions[0].accept_local },
 121
 122     { "ipxcp-accept-remote", o_bool, &ipxcp_wantoptions[0].accept_remote,
 123       "Accept peer's IPX address", 1,
 124       &ipxcp_allowoptions[0].accept_remote },
 125
 126     { "ipx-routing", o_int, &ipxcp_wantoptions[0].router,
 127       "Set IPX routing proto number", OPT_PRIO,
 128       &ipxcp_wantoptions[0].neg_router },
 129
 130     { "ipx-router-name", o_special, setipxname,
 131       "Set IPX router name", OPT_PRIO | OPT_A2STRVAL | OPT_STATIC,
 132        &ipxcp_wantoptions[0].name },
 133
 134     { "ipxcp-restart", o_int, &ipxcp_fsm[0].timeouttime,
 135       "Set timeout for IPXCP", OPT_PRIO },
 136     { "ipxcp-max-terminate", o_int, &ipxcp_fsm[0].maxtermtransmits,
 137       "Set max #xmits for IPXCP term-reqs", OPT_PRIO },
 138     { "ipxcp-max-configure", o_int, &ipxcp_fsm[0].maxconfreqtransmits,
 139       "Set max #xmits for IPXCP conf-reqs", OPT_PRIO },
 140     { "ipxcp-max-failure", o_int, &ipxcp_fsm[0].maxnakloops,
 141       "Set max #conf-naks for IPXCP", OPT_PRIO },
 142
 143     { NULL }
 144 };
 145
 146 /*
 147  * Protocol entry points.
 148  */
 149
 150 static void ipxcp_init __P((int));
 151 static void ipxcp_open __P((int));
 152 static void ipxcp_close __P((int, char *));
 153 static void ipxcp_lowerup __P((int));
 154 static void ipxcp_lowerdown __P((int));
 155 static void ipxcp_input __P((int, u_char *, int));
 156 static void ipxcp_protrej __P((int));
 157 static int  ipxcp_printpkt __P((u_char *, int,
 158                                 void (*) __P((void *, char *, ...)), void *));
 159
 160 struct protent ipxcp_protent = {
 161     PPP_IPXCP,
 162     ipxcp_init,
 163     ipxcp_input,
 164     ipxcp_protrej,
 165     ipxcp_lowerup,
 166     ipxcp_lowerdown,
 167     ipxcp_open,
 168     ipxcp_close,
 169     ipxcp_printpkt,
 170     NULL,
 171     0,
 172     "IPXCP",
 173     "IPX",
 174     ipxcp_option_list,
 175     NULL,
 176     NULL,
 177     NULL
 178 };
 179
 180 /*
 181  * Lengths of configuration options.
 182  */
 183
 184 #define CILEN_VOID      2
 185 #define CILEN_COMPLETE  2       /* length of complete option */
 186 #define CILEN_NETN      6       /* network number length option */
 187 #define CILEN_NODEN     8       /* node number length option */
 188 #define CILEN_PROTOCOL  4       /* Minimum length of routing protocol */
 189 #define CILEN_NAME      3       /* Minimum length of router name */
 190 #define CILEN_COMPRESS  4       /* Minimum length of compression protocol */
 191
 192 #define CODENAME(x)     ((x) == CONFACK ? "ACK" : \
 193                          (x) == CONFNAK ? "NAK" : "REJ")
 194
 195 static int ipxcp_is_up;
 196
 197 static char *ipx_ntoa __P((u_int32_t));
 198
 199 /* Used in printing the node number */
 200 #define NODE(base) base[0], base[1], base[2], base[3], base[4], base[5]
 201
 202 /* Used to generate the proper bit mask */
 203 #define BIT(num)   (1 << (num))
 204
 205 /*
 206  * Convert from internal to external notation
 207  */
 208
 209 static short int
 210 to_external(internal)
 211 short int internal;
 212 {
 213     short int  external;
 214
 215     if (internal & BIT(IPX_NONE) )
 216         external = IPX_NONE;
 217     else
 218         external = RIP_SAP;
 219
 220     return external;
 221 }
 222
 223 /*
 224  * Make a string representation of a network IP address.
 225  */
 226
 227 static char *
 228 ipx_ntoa(ipxaddr)
 229 u_int32_t ipxaddr;
 230 {
 231     static char b[64];
 232     slprintf(b, sizeof(b), "%x", ipxaddr);
 233     return b;
 234 }
 235
 236
 237 static u_char *
 238 setipxnodevalue(src,dst)
 239 u_char *src, *dst;
 240 {
 241     int indx;
 242     int item;
 243
 244     for (;;) {
 245         if (!isxdigit (*src))
 246             break;
 247
 248         for (indx = 0; indx < 5; ++indx) {
 249             dst[indx] <<= 4;
 250             dst[indx] |= (dst[indx + 1] >> 4) & 0x0F;
 251         }
 252
 253         item = toupper (*src) - '0';
 254         if (item > 9)
 255             item -= 7;
 256
 257         dst[5] = (dst[5] << 4) | item;
 258         ++src;
 259     }
 260     return src;
 261 }
 262
 263 static int ipx_prio_our, ipx_prio_his;
 264
 265 static int
 266 setipxnode(argv)
 267     char **argv;
 268 {
 269     char *end;
 270     int have_his = 0;
 271     u_char our_node[6];
 272     u_char his_node[6];
 273
 274     memset (our_node, 0, 6);
 275     memset (his_node, 0, 6);
 276
 277     end = setipxnodevalue (*argv, our_node);
 278     if (*end == ':') {
 279         have_his = 1;
 280         end = setipxnodevalue (++end, his_node);
 281     }
 282
 283     if (*end == '\0') {
 284         ipxcp_wantoptions[0].neg_node = 1;
 285         if (option_priority >= ipx_prio_our) {
 286             memcpy(&ipxcp_wantoptions[0].our_node[0], our_node, 6);
 287             ipx_prio_our = option_priority;
 288         }
 289         if (have_his && option_priority >= ipx_prio_his) {
 290             memcpy(&ipxcp_wantoptions[0].his_node[0], his_node, 6);
 291             ipx_prio_his = option_priority;
 292         }
 293         return 1;
 294     }
 295
 296     option_error("invalid parameter '%s' for ipx-node option", *argv);
 297     return 0;
 298 }
 299
 300 static void
 301 printipxnode(opt, printer, arg)
 302     option_t *opt;
 303     void (*printer) __P((void *, char *, ...));
 304     void *arg;
 305 {
 306         unsigned char *p;
 307
 308         p = ipxcp_wantoptions[0].our_node;
 309         if (ipx_prio_our)
 310                 printer(arg, "%.2x%.2x%.2x%.2x%.2x%.2x",
 311                         p[0], p[1], p[2], p[3], p[4], p[5]);
 312         printer(arg, ":");
 313         p = ipxcp_wantoptions[0].his_node;
 314         if (ipx_prio_his)
 315                 printer(arg, "%.2x%.2x%.2x%.2x%.2x%.2x",
 316                         p[0], p[1], p[2], p[3], p[4], p[5]);
 317 }
 318
 319 static int
 320 setipxname (argv)
 321     char **argv;
 322 {
 323     char *dest = ipxcp_wantoptions[0].name;
 324     char *src  = *argv;
 325     int  count;
 326     char ch;
 327
 328     ipxcp_wantoptions[0].neg_name  = 1;
 329     ipxcp_allowoptions[0].neg_name = 1;
 330     memset (dest, '\0', sizeof (ipxcp_wantoptions[0].name));
 331
 332     count = 0;
 333     while (*src) {
 334         ch = *src++;
 335         if (! isalnum (ch) && ch != '_') {
 336             option_error("IPX router name must be alphanumeric or _");
 337             return 0;
 338         }
 339
 340         if (count >= sizeof (ipxcp_wantoptions[0].name) - 1) {
 341             option_error("IPX router name is limited to %d characters",
 342                          sizeof (ipxcp_wantoptions[0].name) - 1);
 343             return 0;
 344         }
 345
 346         dest[count++] = toupper (ch);
 347     }
 348     dest[count] = 0;
 349
 350     return 1;
 351 }
 352
 353 /*
 354  * ipxcp_init - Initialize IPXCP.
 355  */
 356 static void
 357 ipxcp_init(unit)
 358     int unit;
 359 {
 360     fsm *f = &ipxcp_fsm[unit];
 361
 362     f->unit      = unit;
 363     f->protocol  = PPP_IPXCP;
 364     f->callbacks = &ipxcp_callbacks;
 365     fsm_init(&ipxcp_fsm[unit]);
 366
 367     memset (wo->name,     0, sizeof (wo->name));
 368     memset (wo->our_node, 0, sizeof (wo->our_node));
 369     memset (wo->his_node, 0, sizeof (wo->his_node));
 370
 371     wo->neg_nn         = 1;
 372     wo->neg_complete   = 1;
 373     wo->network        = 0;
 374
 375     ao->neg_node       = 1;
 376     ao->neg_nn         = 1;
 377     ao->neg_name       = 1;
 378     ao->neg_complete   = 1;
 379     ao->neg_router     = 1;
 380
 381     ao->accept_local   = 0;
 382     ao->accept_remote  = 0;
 383     ao->accept_network = 0;
 384
 385     wo->tried_rip      = 0;
 386     wo->tried_nlsp     = 0;
 387 }
 388
 389 /*
 390  * Copy the node number
 391  */
 392
 393 static void
 394 copy_node (src, dst)
 395 u_char *src, *dst;
 396 {
 397     memcpy (dst, src, sizeof (ipxcp_wantoptions[0].our_node));
 398 }
 399
 400 /*
 401  * Compare node numbers
 402  */
 403
 404 static int
 405 compare_node (src, dst)
 406 u_char *src, *dst;
 407 {
 408     return memcmp (dst, src, sizeof (ipxcp_wantoptions[0].our_node)) == 0;
 409 }
 410
 411 /*
 412  * Is the node number zero?
 413  */
 414
 415 static int
 416 zero_node (node)
 417 u_char *node;
 418 {
 419     int indx;
 420     for (indx = 0; indx < sizeof (ipxcp_wantoptions[0].our_node); ++indx)
 421         if (node [indx] != 0)
 422             return 0;
 423     return 1;
 424 }
 425
 426 /*
 427  * Increment the node number
 428  */
 429
 430 static void
 431 inc_node (node)
 432 u_char *node;
 433 {
 434     u_char   *outp;
 435     u_int32_t magic_num;
 436
 437     outp      = node;
 438     magic_num = magic();
 439     *outp++   = '\0';
 440     *outp++   = '\0';
 441     PUTLONG (magic_num, outp);
 442 }
 443
 444 /*
 445  * ipxcp_open - IPXCP is allowed to come up.
 446  */
 447 static void
 448 ipxcp_open(unit)
 449     int unit;
 450 {
 451     fsm_open(&ipxcp_fsm[unit]);
 452 }
 453
 454 /*
 455  * ipxcp_close - Take IPXCP down.
 456  */
 457 static void
 458 ipxcp_close(unit, reason)
 459     int unit;
 460     char *reason;
 461 {
 462     fsm_close(&ipxcp_fsm[unit], reason);
 463 }
 464
 465
 466 /*
 467  * ipxcp_lowerup - The lower layer is up.
 468  */
 469 static void
 470 ipxcp_lowerup(unit)
 471     int unit;
 472 {
 473     fsm_lowerup(&ipxcp_fsm[unit]);
 474 }
 475
 476
 477 /*
 478  * ipxcp_lowerdown - The lower layer is down.
 479  */
 480 static void
 481 ipxcp_lowerdown(unit)
 482     int unit;
 483 {
 484     fsm_lowerdown(&ipxcp_fsm[unit]);
 485 }
 486
 487
 488 /*
 489  * ipxcp_input - Input IPXCP packet.
 490  */
 491 static void
 492 ipxcp_input(unit, p, len)
 493     int unit;
 494     u_char *p;
 495     int len;
 496 {
 497     fsm_input(&ipxcp_fsm[unit], p, len);
 498 }
 499
 500
 501 /*
 502  * ipxcp_protrej - A Protocol-Reject was received for IPXCP.
 503  *
 504  * Pretend the lower layer went down, so we shut up.
 505  */
 506 static void
 507 ipxcp_protrej(unit)
 508     int unit;
 509 {
 510     fsm_lowerdown(&ipxcp_fsm[unit]);
 511 }
 512
 513
 514 /*
 515  * ipxcp_resetci - Reset our CI.
 516  */
 517 static void
 518 ipxcp_resetci(f)
 519     fsm *f;
 520 {
 521     wo->req_node = wo->neg_node && ao->neg_node;
 522     wo->req_nn   = wo->neg_nn   && ao->neg_nn;
 523
 524     if (wo->our_network == 0) {
 525         wo->neg_node       = 1;
 526         ao->accept_network = 1;
 527     }
 528 /*
 529  * If our node number is zero then change it.
 530  */
 531     if (zero_node (wo->our_node)) {
 532         inc_node (wo->our_node);
 533         ao->accept_local = 1;
 534         wo->neg_node     = 1;
 535     }
 536 /*
 537  * If his node number is zero then change it.
 538  */
 539     if (zero_node (wo->his_node)) {
 540         inc_node (wo->his_node);
 541         ao->accept_remote = 1;
 542     }
 543 /*
 544  * If no routing agent was specified then we do RIP/SAP according to the
 545  * RFC documents. If you have specified something then OK. Otherwise, we
 546  * do RIP/SAP.
 547  */
 548     if (ao->router == 0) {
 549         ao->router |= BIT(RIP_SAP);
 550         wo->router |= BIT(RIP_SAP);
 551     }
 552
 553     /* Always specify a routing protocol unless it was REJected. */
 554     wo->neg_router = 1;
 555 /*
 556  * Start with these default values
 557  */
 558     *go = *wo;
 559 }
 560
 561 /*
 562  * ipxcp_cilen - Return length of our CI.
 563  */
 564
 565 static int
 566 ipxcp_cilen(f)
 567     fsm *f;
 568 {
 569     int len;
 570
 571     len  = go->neg_nn       ? CILEN_NETN     : 0;
 572     len += go->neg_node     ? CILEN_NODEN    : 0;
 573     len += go->neg_name     ? CILEN_NAME + strlen (go->name) - 1 : 0;
 574
 575     /* RFC says that defaults should not be included. */
 576     if (go->neg_router && to_external(go->router) != RIP_SAP)
 577         len += CILEN_PROTOCOL;
 578
 579     return (len);
 580 }
 581
 582
 583 /*
 584  * ipxcp_addci - Add our desired CIs to a packet.
 585  */
 586 static void
 587 ipxcp_addci(f, ucp, lenp)
 588     fsm *f;
 589     u_char *ucp;
 590     int *lenp;
 591 {
 592 /*
 593  * Add the options to the record.
 594  */
 595     if (go->neg_nn) {
 596         PUTCHAR (IPX_NETWORK_NUMBER, ucp);
 597         PUTCHAR (CILEN_NETN, ucp);
 598         PUTLONG (go->our_network, ucp);
 599     }
 600
 601     if (go->neg_node) {
 602         int indx;
 603         PUTCHAR (IPX_NODE_NUMBER, ucp);
 604         PUTCHAR (CILEN_NODEN, ucp);
 605         for (indx = 0; indx < sizeof (go->our_node); ++indx)
 606             PUTCHAR (go->our_node[indx], ucp);
 607     }
 608
 609     if (go->neg_name) {
 610         int cilen = strlen (go->name);
 611         int indx;
 612         PUTCHAR (IPX_ROUTER_NAME, ucp);
 613         PUTCHAR (CILEN_NAME + cilen - 1, ucp);
 614         for (indx = 0; indx < cilen; ++indx)
 615             PUTCHAR (go->name [indx], ucp);
 616     }
 617
 618     if (go->neg_router) {
 619         short external = to_external (go->router);
 620         if (external != RIP_SAP) {
 621             PUTCHAR  (IPX_ROUTER_PROTOCOL, ucp);
 622             PUTCHAR  (CILEN_PROTOCOL,      ucp);
 623             PUTSHORT (external,            ucp);
 624         }
 625     }
 626 }
 627
 628 /*
 629  * ipxcp_ackci - Ack our CIs.
 630  *
 631  * Returns:
 632  *      0 - Ack was bad.
 633  *      1 - Ack was good.
 634  */
 635 static int
 636 ipxcp_ackci(f, p, len)
 637     fsm *f;
 638     u_char *p;
 639     int len;
 640 {
 641     u_short cilen, citype, cishort;
 642     u_char cichar;
 643     u_int32_t cilong;
 644
 645 #define ACKCIVOID(opt, neg) \
 646     if (neg) { \
 647         if ((len -= CILEN_VOID) < 0) \
 648             break; \
 649         GETCHAR(citype, p); \
 650         GETCHAR(cilen, p); \
 651         if (cilen != CILEN_VOID || \
 652             citype != opt) \
 653             break; \
 654     }
 655
 656 #define ACKCICOMPLETE(opt,neg)  ACKCIVOID(opt, neg)
 657
 658 #define ACKCICHARS(opt, neg, val, cnt) \
 659     if (neg) { \
 660         int indx, count = cnt; \
 661         len -= (count + 2); \
 662         if (len < 0) \
 663             break; \
 664         GETCHAR(citype, p); \
 665         GETCHAR(cilen, p); \
 666         if (cilen != (count + 2) || \
 667             citype != opt) \
 668             break; \
 669         for (indx = 0; indx < count; ++indx) {\
 670             GETCHAR(cichar, p); \
 671             if (cichar != ((u_char *) &val)[indx]) \
 672                break; \
 673         }\
 674         if (indx != count) \
 675             break; \
 676     }
 677
 678 #define ACKCINODE(opt,neg,val) ACKCICHARS(opt,neg,val,sizeof(val))
 679 #define ACKCINAME(opt,neg,val) ACKCICHARS(opt,neg,val,strlen(val))
 680
 681 #define ACKCINETWORK(opt, neg, val) \
 682     if (neg) { \
 683         if ((len -= CILEN_NETN) < 0) \
 684             break; \
 685         GETCHAR(citype, p); \
 686         GETCHAR(cilen, p); \
 687         if (cilen != CILEN_NETN || \
 688             citype != opt) \
 689             break; \
 690         GETLONG(cilong, p); \
 691         if (cilong != val) \
 692             break; \
 693     }
 694
 695 #define ACKCIPROTO(opt, neg, val) \
 696     if (neg) { \
 697         if (len < 2) \
 698             break; \
 699         GETCHAR(citype, p); \
 700         GETCHAR(cilen, p); \
 701         if (cilen != CILEN_PROTOCOL || citype != opt) \
 702             break; \
 703         len -= cilen; \
 704         if (len < 0) \
 705             break; \
 706         GETSHORT(cishort, p); \
 707         if (cishort != to_external (val) || cishort == RIP_SAP) \
 708             break; \
 709       }
 710 /*
 711  * Process the ACK frame in the order in which the frame was assembled
 712  */
 713     do {
 714         ACKCINETWORK  (IPX_NETWORK_NUMBER,  go->neg_nn,     go->our_network);
 715         ACKCINODE     (IPX_NODE_NUMBER,     go->neg_node,   go->our_node);
 716         ACKCINAME     (IPX_ROUTER_NAME,     go->neg_name,   go->name);
 717         if (len > 0)
 718                 ACKCIPROTO    (IPX_ROUTER_PROTOCOL, go->neg_router, go->router);
 719 /*
 720  * This is the end of the record.
 721  */
 722         if (len == 0)
 723             return (1);
 724     } while (0);
 725 /*
 726  * The frame is invalid
 727  */
 728     IPXCPDEBUG(("ipxcp_ackci: received bad Ack!"));
 729     return (0);
 730 }
 731
 732 /*
 733  * ipxcp_nakci - Peer has sent a NAK for some of our CIs.
 734  * This should not modify any state if the Nak is bad
 735  * or if IPXCP is in the OPENED state.
 736  *
 737  * Returns:
 738  *      0 - Nak was bad.
 739  *      1 - Nak was good.
 740  */
 741
 742 static int
 743 ipxcp_nakci(f, p, len)
 744     fsm *f;
 745     u_char *p;
 746     int len;
 747 {
 748     u_char citype, cilen, *next;
 749     u_short s;
 750     u_int32_t l;
 751     ipxcp_options no;           /* options we've seen Naks for */
 752     ipxcp_options try;          /* options to request next time */
 753
 754     BZERO(&no, sizeof(no));
 755     try = *go;
 756
 757     while (len > CILEN_VOID) {
 758         GETCHAR (citype, p);
 759         GETCHAR (cilen,  p);
 760         len -= cilen;
 761         if (len < 0)
 762             goto bad;
 763         next = &p [cilen - CILEN_VOID];
 764
 765         switch (citype) {
 766         case IPX_NETWORK_NUMBER:
 767             if (!go->neg_nn || no.neg_nn || (cilen != CILEN_NETN))
 768                 goto bad;
 769             no.neg_nn = 1;
 770
 771             GETLONG(l, p);
 772             if (l && ao->accept_network)
 773                 try.our_network = l;
 774             break;
 775
 776         case IPX_NODE_NUMBER:
 777             if (!go->neg_node || no.neg_node || (cilen != CILEN_NODEN))
 778                 goto bad;
 779             no.neg_node = 1;
 780
 781             if (!zero_node (p) && ao->accept_local &&
 782                 ! compare_node (p, ho->his_node))
 783                 copy_node (p, try.our_node);
 784             break;
 785
 786             /* This has never been sent. Ignore the NAK frame */
 787         case IPX_COMPRESSION_PROTOCOL:
 788             goto bad;
 789
 790         case IPX_ROUTER_PROTOCOL:
 791             if (!go->neg_router || (cilen < CILEN_PROTOCOL))
 792                 goto bad;
 793
 794             GETSHORT (s, p);
 795             if (s > 15)         /* This is just bad, but ignore for now. */
 796                 break;
 797
 798             s = BIT(s);
 799             if (no.router & s)  /* duplicate NAKs are always bad */
 800                 goto bad;
 801
 802             if (no.router == 0) /* Reset on first NAK only */
 803                 try.router = 0;
 804
 805             no.router      |= s;
 806             try.router     |= s;
 807             try.neg_router  = 1;
 808             break;
 809
 810             /* These, according to the RFC, must never be NAKed. */
 811         case IPX_ROUTER_NAME:
 812         case IPX_COMPLETE:
 813             goto bad;
 814
 815             /* These are for options which we have not seen. */
 816         default:
 817             break;
 818         }
 819         p = next;
 820     }
 821
 822     /*
 823      * Do not permit the peer to force a router protocol which we do not
 824      * support. However, default to the condition that will accept "NONE".
 825      */
 826     try.router &= (ao->router | BIT(IPX_NONE));
 827     if (try.router == 0 && ao->router != 0)
 828         try.router = BIT(IPX_NONE);
 829
 830     if (try.router != 0)
 831         try.neg_router = 1;
 832
 833     /*
 834      * OK, the Nak is good.  Now we can update state.
 835      * If there are any options left, we ignore them.
 836      */
 837     if (f->state != OPENED)
 838         *go = try;
 839
 840     return 1;
 841
 842 bad:
 843     IPXCPDEBUG(("ipxcp_nakci: received bad Nak!"));
 844     return 0;
 845 }
 846
 847 /*
 848  * ipxcp_rejci - Reject some of our CIs.
 849  */
 850 static int
 851 ipxcp_rejci(f, p, len)
 852     fsm *f;
 853     u_char *p;
 854     int len;
 855 {
 856     u_short cilen, citype, cishort;
 857     u_char cichar;
 858     u_int32_t cilong;
 859     ipxcp_options try;          /* options to request next time */
 860
 861 #define REJCINETWORK(opt, neg, val) \
 862     if (neg && p[0] == opt) { \
 863         if ((len -= CILEN_NETN) < 0) \
 864             break; \
 865         GETCHAR(citype, p); \
 866         GETCHAR(cilen, p); \
 867         if (cilen != CILEN_NETN || \
 868             citype != opt) \
 869             break; \
 870         GETLONG(cilong, p); \
 871         if (cilong != val) \
 872             break; \
 873         neg = 0; \
 874     }
 875
 876 #define REJCICHARS(opt, neg, val, cnt) \
 877     if (neg && p[0] == opt) { \
 878         int indx, count = cnt; \
 879         len -= (count + 2); \
 880         if (len < 0) \
 881             break; \
 882         GETCHAR(citype, p); \
 883         GETCHAR(cilen, p); \
 884         if (cilen != (count + 2) || \
 885             citype != opt) \
 886             break; \
 887         for (indx = 0; indx < count; ++indx) {\
 888             GETCHAR(cichar, p); \
 889             if (cichar != ((u_char *) &val)[indx]) \
 890                break; \
 891         }\
 892         if (indx != count) \
 893             break; \
 894         neg = 0; \
 895     }
 896
 897 #define REJCINODE(opt,neg,val) REJCICHARS(opt,neg,val,sizeof(val))
 898 #define REJCINAME(opt,neg,val) REJCICHARS(opt,neg,val,strlen(val))
 899
 900 #define REJCIVOID(opt, neg) \
 901     if (neg && p[0] == opt) { \
 902         if ((len -= CILEN_VOID) < 0) \
 903             break; \
 904         GETCHAR(citype, p); \
 905         GETCHAR(cilen, p); \
 906         if (cilen != CILEN_VOID || citype != opt) \
 907             break; \
 908         neg = 0; \
 909     }
 910
 911 /* a reject for RIP/SAP is invalid since we don't send it and you can't
 912    reject something which is not sent. (You can NAK, but you can't REJ.) */
 913 #define REJCIPROTO(opt, neg, val, bit) \
 914     if (neg && p[0] == opt) { \
 915         if ((len -= CILEN_PROTOCOL) < 0) \
 916             break; \
 917         GETCHAR(citype, p); \
 918         GETCHAR(cilen, p); \
 919         if (cilen != CILEN_PROTOCOL) \
 920             break; \
 921         GETSHORT(cishort, p); \
 922         if (cishort != to_external (val) || cishort == RIP_SAP) \
 923             break; \
 924         neg = 0; \
 925     }
 926 /*
 927  * Any Rejected CIs must be in exactly the same order that we sent.
 928  * Check packet length and CI length at each step.
 929  * If we find any deviations, then this packet is bad.
 930  */
 931     try = *go;
 932
 933     do {
 934         REJCINETWORK (IPX_NETWORK_NUMBER,  try.neg_nn,     try.our_network);
 935         REJCINODE    (IPX_NODE_NUMBER,     try.neg_node,   try.our_node);
 936         REJCINAME    (IPX_ROUTER_NAME,     try.neg_name,   try.name);
 937         REJCIPROTO   (IPX_ROUTER_PROTOCOL, try.neg_router, try.router, 0);
 938 /*
 939  * This is the end of the record.
 940  */
 941         if (len == 0) {
 942             if (f->state != OPENED)
 943                 *go = try;
 944             return (1);
 945         }
 946     } while (0);
 947 /*
 948  * The frame is invalid at this point.
 949  */
 950     IPXCPDEBUG(("ipxcp_rejci: received bad Reject!"));
 951     return 0;
 952 }
 953
 954 /*
 955  * ipxcp_reqci - Check the peer's requested CIs and send appropriate response.
 956  *
 957  * Returns: CONFACK, CONFNAK or CONFREJ and input packet modified
 958  * appropriately.  If reject_if_disagree is non-zero, doesn't return
 959  * CONFNAK; returns CONFREJ if it can't return CONFACK.
 960  */
 961 static int
 962 ipxcp_reqci(f, inp, len, reject_if_disagree)
 963     fsm *f;
 964     u_char *inp;                /* Requested CIs */
 965     int *len;                   /* Length of requested CIs */
 966     int reject_if_disagree;
 967 {
 968     u_char *cip, *next;         /* Pointer to current and next CIs */
 969     u_short cilen, citype;      /* Parsed len, type */
 970     u_short cishort;            /* Parsed short value */
 971     u_int32_t cinetwork;        /* Parsed address values */
 972     int rc = CONFACK;           /* Final packet return code */
 973     int orc;                    /* Individual option return code */
 974     u_char *p;                  /* Pointer to next char to parse */
 975     u_char *ucp = inp;          /* Pointer to current output char */
 976     int l = *len;               /* Length left */
 977
 978     /*
 979      * Reset all his options.
 980      */
 981     BZERO(ho, sizeof(*ho));
 982
 983     /*
 984      * Process all his options.
 985      */
 986     next = inp;
 987     while (l) {
 988         orc = CONFACK;                  /* Assume success */
 989         cip = p = next;                 /* Remember begining of CI */
 990         if (l < 2 ||                    /* Not enough data for CI header or */
 991             p[1] < 2 ||                 /*  CI length too small or */
 992             p[1] > l) {                 /*  CI length too big? */
 993             IPXCPDEBUG(("ipxcp_reqci: bad CI length!"));
 994             orc = CONFREJ;              /* Reject bad CI */
 995             cilen = l;                  /* Reject till end of packet */
 996             l = 0;                      /* Don't loop again */
 997             goto endswitch;
 998         }
 999         GETCHAR(citype, p);             /* Parse CI type */
1000         GETCHAR(cilen, p);              /* Parse CI length */
1001         l -= cilen;                     /* Adjust remaining length */
1002         next += cilen;                  /* Step to next CI */
1003
1004         switch (citype) {               /* Check CI type */
1005 /*
1006  * The network number must match. Choose the larger of the two.
1007  */
1008         case IPX_NETWORK_NUMBER:
1009             /* if we wont negotiate the network number or the length is wrong
1010                then reject the option */
1011             if ( !ao->neg_nn || cilen != CILEN_NETN ) {
1012                 orc = CONFREJ;
1013                 break;
1014             }
1015             GETLONG(cinetwork, p);
1016
1017             /* If the network numbers match then acknowledge them. */
1018             if (cinetwork != 0) {
1019                 ho->his_network = cinetwork;
1020                 ho->neg_nn      = 1;
1021                 if (wo->our_network == cinetwork)
1022                     break;
1023 /*
1024  * If the network number is not given or we don't accept their change or
1025  * the network number is too small then NAK it.
1026  */
1027                 if (! ao->accept_network || cinetwork < wo->our_network) {
1028                     DECPTR (sizeof (u_int32_t), p);
1029                     PUTLONG (wo->our_network, p);
1030                     orc = CONFNAK;
1031                 }
1032                 break;
1033             }
1034 /*
1035  * The peer sent '0' for the network. Give it ours if we have one.
1036  */
1037             if (go->our_network != 0) {
1038                 DECPTR (sizeof (u_int32_t), p);
1039                 PUTLONG (wo->our_network, p);
1040                 orc = CONFNAK;
1041 /*
1042  * We don't have one. Reject the value.
1043  */
1044             } else
1045                 orc = CONFREJ;
1046
1047             break;
1048 /*
1049  * The node number is required
1050  */
1051         case IPX_NODE_NUMBER:
1052             /* if we wont negotiate the node number or the length is wrong
1053                then reject the option */
1054             if ( cilen != CILEN_NODEN ) {
1055                 orc = CONFREJ;
1056                 break;
1057             }
1058
1059             copy_node (p, ho->his_node);
1060             ho->neg_node = 1;
1061 /*
1062  * If the remote does not have a number and we do then NAK it with the value
1063  * which we have for it. (We never have a default value of zero.)
1064  */
1065             if (zero_node (ho->his_node)) {
1066                 orc = CONFNAK;
1067                 copy_node (wo->his_node, p);
1068                 INCPTR (sizeof (wo->his_node), p);
1069                 break;
1070             }
1071 /*
1072  * If you have given me the expected network node number then I'll accept
1073  * it now.
1074  */
1075             if (compare_node (wo->his_node, ho->his_node)) {
1076                 orc = CONFACK;
1077                 ho->neg_node = 1;
1078                 INCPTR (sizeof (wo->his_node), p);
1079                 break;
1080             }
1081 /*
1082  * If his node number is the same as ours then ask him to try the next
1083  * value.
1084  */
1085             if (compare_node (ho->his_node, go->our_node)) {
1086                 inc_node (ho->his_node);
1087                 orc = CONFNAK;
1088                 copy_node (ho->his_node, p);
1089                 INCPTR (sizeof (wo->his_node), p);
1090                 break;
1091             }
1092 /*
1093  * If we don't accept a new value then NAK it.
1094  */
1095             if (! ao->accept_remote) {
1096                 copy_node (wo->his_node, p);
1097                 INCPTR (sizeof (wo->his_node), p);
1098                 orc = CONFNAK;
1099                 break;
1100             }
1101             orc = CONFACK;
1102             ho->neg_node = 1;
1103             INCPTR (sizeof (wo->his_node), p);
1104             break;
1105 /*
1106  * Compression is not desired at this time. It is always rejected.
1107  */
1108         case IPX_COMPRESSION_PROTOCOL:
1109             orc = CONFREJ;
1110             break;
1111 /*
1112  * The routing protocol is a bitmask of various types. Any combination
1113  * of the values RIP_SAP and NLSP are permissible. 'IPX_NONE' for no
1114  * routing protocol must be specified only once.
1115  */
1116         case IPX_ROUTER_PROTOCOL:
1117             if ( !ao->neg_router || cilen < CILEN_PROTOCOL ) {
1118                 orc = CONFREJ;
1119                 break;
1120             }
1121
1122             GETSHORT (cishort, p);
1123
1124             if (wo->neg_router == 0) {
1125                 wo->neg_router = 1;
1126                 wo->router     = BIT(IPX_NONE);
1127             }
1128
1129             if ((cishort == IPX_NONE && ho->router != 0) ||
1130                 (ho->router & BIT(IPX_NONE))) {
1131                 orc = CONFREJ;
1132                 break;
1133             }
1134
1135             cishort = BIT(cishort);
1136             if (ho->router & cishort) {
1137                 orc = CONFREJ;
1138                 break;
1139             }
1140
1141             ho->router    |= cishort;
1142             ho->neg_router = 1;
1143
1144             /* Finally do not allow a router protocol which we do not
1145                support. */
1146
1147             if ((cishort & (ao->router | BIT(IPX_NONE))) == 0) {
1148                 int protocol;
1149
1150                 if (cishort == BIT(NLSP) &&
1151                     (ao->router & BIT(RIP_SAP)) &&
1152                     !wo->tried_rip) {
1153                     protocol      = RIP_SAP;
1154                     wo->tried_rip = 1;
1155                 } else
1156                     protocol = IPX_NONE;
1157
1158                 DECPTR (sizeof (u_int16_t), p);
1159                 PUTSHORT (protocol, p);
1160                 orc = CONFNAK;
1161             }
1162             break;
1163 /*
1164  * The router name is advisorary. Just accept it if it is not too large.
1165  */
1166         case IPX_ROUTER_NAME:
1167             if (cilen >= CILEN_NAME) {
1168                 int name_size = cilen - CILEN_NAME;
1169                 if (name_size > sizeof (ho->name))
1170                     name_size = sizeof (ho->name) - 1;
1171                 memset (ho->name, 0, sizeof (ho->name));
1172                 memcpy (ho->name, p, name_size);
1173                 ho->name [name_size] = '\0';
1174                 ho->neg_name = 1;
1175                 orc = CONFACK;
1176                 break;
1177             }
1178             orc = CONFREJ;
1179             break;
1180 /*
1181  * This is advisorary.
1182  */
1183         case IPX_COMPLETE:
1184             if (cilen != CILEN_COMPLETE)
1185                 orc = CONFREJ;
1186             else {
1187                 ho->neg_complete = 1;
1188                 orc = CONFACK;
1189             }
1190             break;
1191 /*
1192  * All other entries are not known at this time.
1193  */
1194         default:
1195             orc = CONFREJ;
1196             break;
1197         }
1198 endswitch:
1199         if (orc == CONFACK &&           /* Good CI */
1200             rc != CONFACK)              /*  but prior CI wasnt? */
1201             continue;                   /* Don't send this one */
1202
1203         if (orc == CONFNAK) {           /* Nak this CI? */
1204             if (reject_if_disagree)     /* Getting fed up with sending NAKs? */
1205                 orc = CONFREJ;          /* Get tough if so */
1206             if (rc == CONFREJ)          /* Rejecting prior CI? */
1207                 continue;               /* Don't send this one */
1208             if (rc == CONFACK) {        /* Ack'd all prior CIs? */
1209                 rc  = CONFNAK;          /* Not anymore... */
1210                 ucp = inp;              /* Backup */
1211             }
1212         }
1213
1214         if (orc == CONFREJ &&           /* Reject this CI */
1215             rc != CONFREJ) {            /*  but no prior ones? */
1216             rc = CONFREJ;
1217             ucp = inp;                  /* Backup */
1218         }
1219
1220         /* Need to move CI? */
1221         if (ucp != cip)
1222             BCOPY(cip, ucp, cilen);     /* Move it */
1223
1224         /* Update output pointer */
1225         INCPTR(cilen, ucp);
1226     }
1227
1228     /*
1229      * If we aren't rejecting this packet, and we want to negotiate
1230      * their address, and they didn't send their address, then we
1231      * send a NAK with a IPX_NODE_NUMBER option appended. We assume the
1232      * input buffer is long enough that we can append the extra
1233      * option safely.
1234      */
1235
1236     if (rc != CONFREJ && !ho->neg_node &&
1237         wo->req_nn && !reject_if_disagree) {
1238         if (rc == CONFACK) {
1239             rc = CONFNAK;
1240             wo->req_nn = 0;             /* don't ask again */
1241             ucp = inp;                  /* reset pointer */
1242         }
1243
1244         if (zero_node (wo->his_node))
1245             inc_node (wo->his_node);
1246
1247         PUTCHAR (IPX_NODE_NUMBER, ucp);
1248         PUTCHAR (CILEN_NODEN, ucp);
1249         copy_node (wo->his_node, ucp);
1250         INCPTR (sizeof (wo->his_node), ucp);
1251     }
1252
1253     *len = ucp - inp;                   /* Compute output length */
1254     IPXCPDEBUG(("ipxcp: returning Configure-%s", CODENAME(rc)));
1255     return (rc);                        /* Return final code */
1256 }
1257
1258 /*
1259  * ipxcp_up - IPXCP has come UP.
1260  *
1261  * Configure the IP network interface appropriately and bring it up.
1262  */
1263
1264 static void
1265 ipxcp_up(f)
1266     fsm *f;
1267 {
1268     int unit = f->unit;
1269
1270     IPXCPDEBUG(("ipxcp: up"));
1271
1272     /* The default router protocol is RIP/SAP. */
1273     if (ho->router == 0)
1274         ho->router = BIT(RIP_SAP);
1275
1276     if (go->router == 0)
1277         go->router = BIT(RIP_SAP);
1278
1279     /* Fetch the network number */
1280     if (!ho->neg_nn)
1281         ho->his_network = wo->his_network;
1282
1283     if (!ho->neg_node)
1284         copy_node (wo->his_node, ho->his_node);
1285
1286     if (!wo->neg_node && !go->neg_node)
1287         copy_node (wo->our_node, go->our_node);
1288
1289     if (zero_node (go->our_node)) {
1290         static char errmsg[] = "Could not determine local IPX node address";
1291         if (debug)
1292             error(errmsg);
1293         ipxcp_close(f->unit, errmsg);
1294         return;
1295     }
1296
1297     go->network = go->our_network;
1298     if (ho->his_network != 0 && ho->his_network > go->network)
1299         go->network = ho->his_network;
1300
1301     if (go->network == 0) {
1302         static char errmsg[] = "Can not determine network number";
1303         if (debug)
1304             error(errmsg);
1305         ipxcp_close (unit, errmsg);
1306         return;
1307     }
1308
1309     /* bring the interface up */
1310     if (!sifup(unit)) {
1311         if (debug)
1312             warn("sifup failed (IPX)");
1313         ipxcp_close(unit, "Interface configuration failed");
1314         return;
1315     }
1316     ipxcp_is_up = 1;
1317
1318     /* set the network number for IPX */
1319     if (!sipxfaddr(unit, go->network, go->our_node)) {
1320         if (debug)
1321             warn("sipxfaddr failed");
1322         ipxcp_close(unit, "Interface configuration failed");
1323         return;
1324     }
1325
1326     np_up(f->unit, PPP_IPX);
1327
1328     /*
1329      * Execute the ipx-up script, like this:
1330      *  /etc/ppp/ipx-up interface tty speed local-IPX remote-IPX
1331      */
1332
1333     ipxcp_script (f, _PATH_IPXUP);
1334 }
1335
1336 /*
1337  * ipxcp_down - IPXCP has gone DOWN.
1338  *
1339  * Take the IP network interface down, clear its addresses
1340  * and delete routes through it.
1341  */
1342
1343 static void
1344 ipxcp_down(f)
1345     fsm *f;
1346 {
1347     IPXCPDEBUG(("ipxcp: down"));
1348
1349     if (!ipxcp_is_up)
1350         return;
1351     ipxcp_is_up = 0;
1352     np_down(f->unit, PPP_IPX);
1353     cipxfaddr(f->unit);
1354     sifnpmode(f->unit, PPP_IPX, NPMODE_DROP);
1355     sifdown(f->unit);
1356     ipxcp_script (f, _PATH_IPXDOWN);
1357 }
1358
1359
1360 /*
1361  * ipxcp_finished - possibly shut down the lower layers.
1362  */
1363 static void
1364 ipxcp_finished(f)
1365     fsm *f;
1366 {
1367     np_finished(f->unit, PPP_IPX);
1368 }
1369
1370
1371 /*
1372  * ipxcp_script - Execute a script with arguments
1373  * interface-name tty-name speed local-IPX remote-IPX networks.
1374  */
1375 static void
1376 ipxcp_script(f, script)
1377     fsm *f;
1378     char *script;
1379 {
1380     char strspeed[32],   strlocal[32],     strremote[32];
1381     char strnetwork[32], strpid[32];
1382     char *argv[14],      strproto_lcl[32], strproto_rmt[32];
1383
1384     slprintf(strpid, sizeof(strpid), "%d", getpid());
1385     slprintf(strspeed, sizeof(strspeed),"%d", baud_rate);
1386
1387     strproto_lcl[0] = '\0';
1388     if (go->neg_router && ((go->router & BIT(IPX_NONE)) == 0)) {
1389         if (go->router & BIT(RIP_SAP))
1390             strlcpy (strproto_lcl, "RIP ", sizeof(strproto_lcl));
1391         if (go->router & BIT(NLSP))
1392             strlcat (strproto_lcl, "NLSP ", sizeof(strproto_lcl));
1393     }
1394
1395     if (strproto_lcl[0] == '\0')
1396         strlcpy (strproto_lcl, "NONE ", sizeof(strproto_lcl));
1397
1398     strproto_lcl[strlen (strproto_lcl)-1] = '\0';
1399
1400     strproto_rmt[0] = '\0';
1401     if (ho->neg_router && ((ho->router & BIT(IPX_NONE)) == 0)) {
1402         if (ho->router & BIT(RIP_SAP))
1403             strlcpy (strproto_rmt, "RIP ", sizeof(strproto_rmt));
1404         if (ho->router & BIT(NLSP))
1405             strlcat (strproto_rmt, "NLSP ", sizeof(strproto_rmt));
1406     }
1407
1408     if (strproto_rmt[0] == '\0')
1409         strlcpy (strproto_rmt, "NONE ", sizeof(strproto_rmt));
1410
1411     strproto_rmt[strlen (strproto_rmt)-1] = '\0';
1412
1413     strlcpy (strnetwork, ipx_ntoa (go->network), sizeof(strnetwork));
1414
1415     slprintf (strlocal, sizeof(strlocal), "%0.6B", go->our_node);
1416
1417     slprintf (strremote, sizeof(strremote), "%0.6B", ho->his_node);
1418
1419     argv[0]  = script;
1420     argv[1]  = ifname;
1421     argv[2]  = devnam;
1422     argv[3]  = strspeed;
1423     argv[4]  = strnetwork;
1424     argv[5]  = strlocal;
1425     argv[6]  = strremote;
1426     argv[7]  = strproto_lcl;
1427     argv[8]  = strproto_rmt;
1428     argv[9]  = go->name;
1429     argv[10] = ho->name;
1430     argv[11] = ipparam;
1431     argv[12] = strpid;
1432     argv[13] = NULL;
1433     run_program(script, argv, 0, NULL, NULL);
1434 }
1435
1436 /*
1437  * ipxcp_printpkt - print the contents of an IPXCP packet.
1438  */
1439 static char *ipxcp_codenames[] = {
1440     "ConfReq", "ConfAck", "ConfNak", "ConfRej",
1441     "TermReq", "TermAck", "CodeRej"
1442 };
1443
1444 static int
1445 ipxcp_printpkt(p, plen, printer, arg)
1446     u_char *p;
1447     int plen;
1448     void (*printer) __P((void *, char *, ...));
1449     void *arg;
1450 {
1451     int code, id, len, olen;
1452     u_char *pstart, *optend;
1453     u_short cishort;
1454     u_int32_t cilong;
1455
1456     if (plen < HEADERLEN)
1457         return 0;
1458     pstart = p;
1459     GETCHAR(code, p);
1460     GETCHAR(id, p);
1461     GETSHORT(len, p);
1462     if (len < HEADERLEN || len > plen)
1463         return 0;
1464
1465     if (code >= 1 && code <= sizeof(ipxcp_codenames) / sizeof(char *))
1466         printer(arg, " %s", ipxcp_codenames[code-1]);
1467     else
1468         printer(arg, " code=0x%x", code);
1469     printer(arg, " id=0x%x", id);
1470     len -= HEADERLEN;
1471     switch (code) {
1472     case CONFREQ:
1473     case CONFACK:
1474     case CONFNAK:
1475     case CONFREJ:
1476         /* print option list */
1477         while (len >= 2) {
1478             GETCHAR(code, p);
1479             GETCHAR(olen, p);
1480             p -= 2;
1481             if (olen < CILEN_VOID || olen > len) {
1482                 break;
1483             }
1484             printer(arg, " <");
1485             len -= olen;
1486             optend = p + olen;
1487             switch (code) {
1488             case IPX_NETWORK_NUMBER:
1489                 if (olen == CILEN_NETN) {
1490                     p += 2;
1491                     GETLONG(cilong, p);
1492                     printer (arg, "network %s", ipx_ntoa (cilong));
1493                 }
1494                 break;
1495             case IPX_NODE_NUMBER:
1496                 if (olen == CILEN_NODEN) {
1497                     p += 2;
1498                     printer (arg, "node ");
1499                     while (p < optend) {
1500                         GETCHAR(code, p);
1501                         printer(arg, "%.2x", (int) (unsigned int) (unsigned char) code);
1502                     }
1503                 }
1504                 break;
1505             case IPX_COMPRESSION_PROTOCOL:
1506                 if (olen == CILEN_COMPRESS) {
1507                     p += 2;
1508                     GETSHORT (cishort, p);
1509                     printer (arg, "compression %d", (int) cishort);
1510                 }
1511                 break;
1512             case IPX_ROUTER_PROTOCOL:
1513                 if (olen == CILEN_PROTOCOL) {
1514                     p += 2;
1515                     GETSHORT (cishort, p);
1516                     printer (arg, "router proto %d", (int) cishort);
1517                 }
1518                 break;
1519             case IPX_ROUTER_NAME:
1520                 if (olen >= CILEN_NAME) {
1521                     p += 2;
1522                     printer (arg, "router name \"");
1523                     while (p < optend) {
1524                         GETCHAR(code, p);
1525                         if (code >= 0x20 && code <= 0x7E)
1526                             printer (arg, "%c", (int) (unsigned int) (unsigned char) code);
1527                         else
1528                             printer (arg, " \\%.2x", (int) (unsigned int) (unsigned char) code);
1529                     }
1530                     printer (arg, "\"");
1531                 }
1532                 break;
1533             case IPX_COMPLETE:
1534                 if (olen == CILEN_COMPLETE) {
1535                     p += 2;
1536                     printer (arg, "complete");
1537                 }
1538                 break;
1539             default:
1540                 break;
1541             }
1542
1543             while (p < optend) {
1544                 GETCHAR(code, p);
1545                 printer(arg, " %.2x", (int) (unsigned int) (unsigned char) code);
1546             }
1547             printer(arg, ">");
1548         }
1549         break;
1550
1551     case TERMACK:
1552     case TERMREQ:
1553         if (len > 0 && *p >= ' ' && *p < 0x7f) {
1554             printer(arg, " ");
1555             print_string(p, len, printer, arg);
1556             p += len;
1557             len = 0;
1558         }
1559         break;
1560     }
1561
1562     /* print the rest of the bytes in the packet */
1563     for (; len > 0; --len) {
1564         GETCHAR(code, p);
1565         printer(arg, " %.2x", (int) (unsigned int) (unsigned char) code);
1566     }
1567
1568     return p - pstart;
1569 }
1570 #endif /* ifdef IPX_CHANGE */