tcpdump.tproj/print-egp.c

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * "Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
   7  * Reserved.  This file contains Original Code and/or Modifications of
   8  * Original Code as defined in and that are subject to the Apple Public
   9  * Source License Version 1.0 (the 'License').  You may not use this file
  10  * except in compliance with the License.  Please obtain a copy of the
  11  * License at http://www.apple.com/publicsource and read it before using
  12  * this file.
  13  *
  14  * The Original Code and all software distributed under the License are
  15  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  16  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  17  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  19  * License for the specific language governing rights and limitations
  20  * under the License."
  21  *
  22  * @APPLE_LICENSE_HEADER_END@
  23  */
  24 /*
  25  * Copyright (c) 1991, 1992, 1993, 1994, 1995, 1996
  26  *      The Regents of the University of California.  All rights reserved.
  27  *
  28  * Redistribution and use in source and binary forms are permitted
  29  * provided that the above copyright notice and this paragraph are
  30  * duplicated in all such forms and that any documentation,
  31  * advertising materials, and other materials related to such
  32  * distribution and use acknowledge that the software was developed
  33  * by the University of California, Lawrence Berkeley Laboratory,
  34  * Berkeley, CA.  The name of the University may not be used to
  35  * endorse or promote products derived from this software without
  36  * specific prior written permission.
  37  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
  38  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  39  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  40  *
  41  * Initial contribution from Jeff Honig (jch@MITCHELL.CIT.CORNELL.EDU).
  42  */
  43
  44 #ifndef lint
  45 static const char rcsid[] =
  46     "@(#) $Header: /cvs/Darwin/Commands/NeXT/network_cmds/tcpdump.tproj/print-egp.c,v 1.1.1.1 1999/05/02 03:58:33 wsanchez Exp $ (LBL)";
  47 #endif
  48
  49 #include <sys/param.h>
  50 #include <sys/time.h>
  51 #include <sys/uio.h>
  52 #include <sys/socket.h>
  53
  54 #include <netinet/in.h>
  55 #include <netinet/in_systm.h>
  56 #include <netinet/ip.h>
  57
  58 #include <netdb.h>
  59 #include <stdio.h>
  60
  61 #include "interface.h"
  62 #include "addrtoname.h"
  63
  64 struct egp_packet {
  65         u_char  egp_version;
  66 #define EGP_VERSION     2
  67         u_char  egp_type;
  68 #define  EGPT_ACQUIRE   3
  69 #define  EGPT_REACH     5
  70 #define  EGPT_POLL      2
  71 #define  EGPT_UPDATE    1
  72 #define  EGPT_ERROR     8
  73         u_char  egp_code;
  74 #define  EGPC_REQUEST   0
  75 #define  EGPC_CONFIRM   1
  76 #define  EGPC_REFUSE    2
  77 #define  EGPC_CEASE     3
  78 #define  EGPC_CEASEACK  4
  79 #define  EGPC_HELLO     0
  80 #define  EGPC_HEARDU    1
  81         u_char  egp_status;
  82 #define  EGPS_UNSPEC    0
  83 #define  EGPS_ACTIVE    1
  84 #define  EGPS_PASSIVE   2
  85 #define  EGPS_NORES     3
  86 #define  EGPS_ADMIN     4
  87 #define  EGPS_GODOWN    5
  88 #define  EGPS_PARAM     6
  89 #define  EGPS_PROTO     7
  90 #define  EGPS_INDET     0
  91 #define  EGPS_UP        1
  92 #define  EGPS_DOWN      2
  93 #define  EGPS_UNSOL     0x80
  94         u_short  egp_checksum;
  95         u_short  egp_as;
  96         u_short  egp_sequence;
  97         union {
  98                 u_short  egpu_hello;
  99                 u_char egpu_gws[2];
 100                 u_short  egpu_reason;
 101 #define  EGPR_UNSPEC    0
 102 #define  EGPR_BADHEAD   1
 103 #define  EGPR_BADDATA   2
 104 #define  EGPR_NOREACH   3
 105 #define  EGPR_XSPOLL    4
 106 #define  EGPR_NORESP    5
 107 #define  EGPR_UVERSION  6
 108         } egp_handg;
 109 #define  egp_hello  egp_handg.egpu_hello
 110 #define  egp_intgw  egp_handg.egpu_gws[0]
 111 #define  egp_extgw  egp_handg.egpu_gws[1]
 112 #define  egp_reason  egp_handg.egpu_reason
 113         union {
 114                 u_short  egpu_poll;
 115                 u_int32_t egpu_sourcenet;
 116         } egp_pands;
 117 #define  egp_poll  egp_pands.egpu_poll
 118 #define  egp_sourcenet  egp_pands.egpu_sourcenet
 119 };
 120
 121 char *egp_acquire_codes[] = {
 122         "request",
 123         "confirm",
 124         "refuse",
 125         "cease",
 126         "cease_ack"
 127 };
 128
 129 char *egp_acquire_status[] = {
 130         "unspecified",
 131         "active_mode",
 132         "passive_mode",
 133         "insufficient_resources",
 134         "administratively_prohibited",
 135         "going_down",
 136         "parameter_violation",
 137         "protocol_violation"
 138 };
 139
 140 char *egp_reach_codes[] = {
 141         "hello",
 142         "i-h-u"
 143 };
 144
 145 char *egp_status_updown[] = {
 146         "indeterminate",
 147         "up",
 148         "down"
 149 };
 150
 151 char *egp_reasons[] = {
 152         "unspecified",
 153         "bad_EGP_header_format",
 154         "bad_EGP_data_field_format",
 155         "reachability_info_unavailable",
 156         "excessive_polling_rate",
 157         "no_response",
 158         "unsupported_version"
 159 };
 160
 161 static void
 162 egpnrprint(register const struct egp_packet *egp, register u_int length)
 163 {
 164         register const u_char *cp;
 165         u_int32_t addr;
 166         register u_int32_t net;
 167         register u_int netlen;
 168         int gateways, distances, networks;
 169         int t_gateways;
 170         char *comma;
 171
 172         addr = egp->egp_sourcenet;
 173         if (IN_CLASSA(addr)) {
 174                 net = addr & IN_CLASSA_NET;
 175                 netlen = 1;
 176         } else if (IN_CLASSB(addr)) {
 177                 net = addr & IN_CLASSB_NET;
 178                 netlen = 2;
 179         } else if (IN_CLASSC(addr)) {
 180                 net = addr & IN_CLASSC_NET;
 181                 netlen = 3;
 182         } else {
 183                 net = 0;
 184                 netlen = 0;
 185         }
 186         cp = (u_char *)(egp + 1);
 187
 188         t_gateways = egp->egp_intgw + egp->egp_extgw;
 189         for (gateways = 0; gateways < t_gateways; ++gateways) {
 190                 /* Pickup host part of gateway address */
 191                 addr = 0;
 192                 TCHECK2(cp[0], 4 - netlen);
 193                 switch (netlen) {
 194
 195                 case 1:
 196                         addr = *cp++;
 197                         /* fall through */
 198                 case 2:
 199                         addr = (addr << 8) | *cp++;
 200                         /* fall through */
 201                 case 3:
 202                         addr = (addr << 8) | *cp++;
 203                 }
 204                 addr |= net;
 205                 TCHECK2(cp[0], 1);
 206                 distances = *cp++;
 207                 printf(" %s %s ",
 208                        gateways < (int)egp->egp_intgw ? "int" : "ext",
 209                        ipaddr_string(&addr));
 210
 211                 comma = "";
 212                 putchar('(');
 213                 while (--distances >= 0) {
 214                         TCHECK2(cp[0], 2);
 215                         printf("%sd%d:", comma, (int)*cp++);
 216                         comma = ", ";
 217                         networks = *cp++;
 218                         while (--networks >= 0) {
 219                                 /* Pickup network number */
 220                                 TCHECK2(cp[0], 1);
 221                                 addr = (u_int32_t)*cp++ << 24;
 222                                 if (IN_CLASSB(addr)) {
 223                                         TCHECK2(cp[0], 1);
 224                                         addr |= (u_int32_t)*cp++ << 16;
 225                                 } else if (!IN_CLASSA(addr)) {
 226                                         TCHECK2(cp[0], 2);
 227                                         addr |= (u_int32_t)*cp++ << 16;
 228                                         addr |= (u_int32_t)*cp++ << 8;
 229                                 }
 230                                 printf(" %s", ipaddr_string(&addr));
 231                         }
 232                 }
 233                 putchar(')');
 234         }
 235         return;
 236 trunc:
 237         fputs("[|]", stdout);
 238 }
 239
 240 void
 241 egp_print(register const u_char *bp, register u_int length,
 242           register const u_char *bp2)
 243 {
 244         register const struct egp_packet *egp;
 245         register const struct ip *ip;
 246         register int status;
 247         register int code;
 248         register int type;
 249
 250         egp = (struct egp_packet *)bp;
 251         ip = (struct ip *)bp2;
 252         (void)printf("%s > %s: egp: ",
 253                      ipaddr_string(&ip->ip_src),
 254                      ipaddr_string(&ip->ip_dst));
 255
 256         if (egp->egp_version != EGP_VERSION) {
 257                 printf("[version %d]", egp->egp_version);
 258                 return;
 259         }
 260         printf("as:%d seq:%d", ntohs(egp->egp_as), ntohs(egp->egp_sequence));
 261
 262         type = egp->egp_type;
 263         code = egp->egp_code;
 264         status = egp->egp_status;
 265
 266         switch (type) {
 267         case EGPT_ACQUIRE:
 268                 printf(" acquire");
 269                 switch (code) {
 270                 case EGPC_REQUEST:
 271                 case EGPC_CONFIRM:
 272                         printf(" %s", egp_acquire_codes[code]);
 273                         switch (status) {
 274                         case EGPS_UNSPEC:
 275                         case EGPS_ACTIVE:
 276                         case EGPS_PASSIVE:
 277                                 printf(" %s", egp_acquire_status[status]);
 278                                 break;
 279
 280                         default:
 281                                 printf(" [status %d]", status);
 282                                 break;
 283                         }
 284                         printf(" hello:%d poll:%d",
 285                                ntohs(egp->egp_hello),
 286                                ntohs(egp->egp_poll));
 287                         break;
 288
 289                 case EGPC_REFUSE:
 290                 case EGPC_CEASE:
 291                 case EGPC_CEASEACK:
 292                         printf(" %s", egp_acquire_codes[code]);
 293                         switch (status ) {
 294                         case EGPS_UNSPEC:
 295                         case EGPS_NORES:
 296                         case EGPS_ADMIN:
 297                         case EGPS_GODOWN:
 298                         case EGPS_PARAM:
 299                         case EGPS_PROTO:
 300                                 printf(" %s", egp_acquire_status[status]);
 301                                 break;
 302
 303                         default:
 304                                 printf("[status %d]", status);
 305                                 break;
 306                         }
 307                         break;
 308
 309                 default:
 310                         printf("[code %d]", code);
 311                         break;
 312                 }
 313                 break;
 314
 315         case EGPT_REACH:
 316                 switch (code) {
 317
 318                 case EGPC_HELLO:
 319                 case EGPC_HEARDU:
 320                         printf(" %s", egp_reach_codes[code]);
 321                         if (status <= EGPS_DOWN)
 322                                 printf(" state:%s", egp_status_updown[status]);
 323                         else
 324                                 printf(" [status %d]", status);
 325                         break;
 326
 327                 default:
 328                         printf("[reach code %d]", code);
 329                         break;
 330                 }
 331                 break;
 332
 333         case EGPT_POLL:
 334                 printf(" poll");
 335                 if (egp->egp_status <= EGPS_DOWN)
 336                         printf(" state:%s", egp_status_updown[status]);
 337                 else
 338                         printf(" [status %d]", status);
 339                 printf(" net:%s", ipaddr_string(&egp->egp_sourcenet));
 340                 break;
 341
 342         case EGPT_UPDATE:
 343                 printf(" update");
 344                 if (status & EGPS_UNSOL) {
 345                         status &= ~EGPS_UNSOL;
 346                         printf(" unsolicited");
 347                 }
 348                 if (status <= EGPS_DOWN)
 349                         printf(" state:%s", egp_status_updown[status]);
 350                 else
 351                         printf(" [status %d]", status);
 352                 printf(" %s int %d ext %d",
 353                        ipaddr_string(&egp->egp_sourcenet),
 354                        egp->egp_intgw,
 355                        egp->egp_extgw);
 356                 if (vflag)
 357                         egpnrprint(egp, length);
 358                 break;
 359
 360         case EGPT_ERROR:
 361                 printf(" error");
 362                 if (status <= EGPS_DOWN)
 363                         printf(" state:%s", egp_status_updown[status]);
 364                 else
 365                         printf(" [status %d]", status);
 366
 367                 if (ntohs(egp->egp_reason) <= EGPR_UVERSION)
 368                         printf(" %s", egp_reasons[ntohs(egp->egp_reason)]);
 369                 else
 370                         printf(" [reason %d]", ntohs(egp->egp_reason));
 371                 break;
 372
 373         default:
 374                 printf("[type %d]", type);
 375                 break;
 376         }
 377 }