contrib/tcpdump/print-radius.c

   1 /*
   2  * Copyright (C) 2000 Alfredo Andres Omella.  All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  *
   8  *   1. Redistributions of source code must retain the above copyright
   9  *      notice, this list of conditions and the following disclaimer.
  10  *   2. Redistributions in binary form must reproduce the above copyright
  11  *      notice, this list of conditions and the following disclaimer in
  12  *      the documentation and/or other materials provided with the
  13  *      distribution.
  14  *   3. The names of the authors may not be used to endorse or promote
  15  *      products derived from this software without specific prior
  16  *      written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
  19  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  20  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  21  */
  22
  23 /* \summary: Radius protocol printer */
  24
  25 /*
  26  * Radius printer routines as specified on:
  27  *
  28  * RFC 2865:
  29  *      "Remote Authentication Dial In User Service (RADIUS)"
  30  *
  31  * RFC 2866:
  32  *      "RADIUS Accounting"
  33  *
  34  * RFC 2867:
  35  *      "RADIUS Accounting Modifications for Tunnel Protocol Support"
  36  *
  37  * RFC 2868:
  38  *      "RADIUS Attributes for Tunnel Protocol Support"
  39  *
  40  * RFC 2869:
  41  *      "RADIUS Extensions"
  42  *
  43  * RFC 3580:
  44  *      "IEEE 802.1X Remote Authentication Dial In User Service (RADIUS)"
  45  *      "Usage Guidelines"
  46  *
  47  * RFC 4675:
  48  *      "RADIUS Attributes for Virtual LAN and Priority Support"
  49  *
  50  * RFC 5176:
  51  *      "Dynamic Authorization Extensions to RADIUS"
  52  *
  53  * Alfredo Andres Omella (aandres@s21sec.com) v0.1 2000/09/15
  54  *
  55  * TODO: Among other things to print ok MacIntosh and Vendor values
  56  */
  57
  58 #ifdef HAVE_CONFIG_H
  59 #include "config.h"
  60 #endif
  61
  62 #include <netdissect-stdinc.h>
  63
  64 #include <string.h>
  65
  66 #include "netdissect.h"
  67 #include "addrtoname.h"
  68 #include "extract.h"
  69 #include "oui.h"
  70
  71 static const char tstr[] = " [|radius]";
  72
  73 #define TAM_SIZE(x) (sizeof(x)/sizeof(x[0]) )
  74
  75 #define PRINT_HEX(bytes_len, ptr_data)                               \
  76            while(bytes_len)                                          \
  77            {                                                         \
  78               ND_PRINT((ndo, "%02X", *ptr_data ));                   \
  79               ptr_data++;                                            \
  80               bytes_len--;                                           \
  81            }
  82
  83
  84 /* Radius packet codes */
  85 #define RADCMD_ACCESS_REQ   1 /* Access-Request      */
  86 #define RADCMD_ACCESS_ACC   2 /* Access-Accept       */
  87 #define RADCMD_ACCESS_REJ   3 /* Access-Reject       */
  88 #define RADCMD_ACCOUN_REQ   4 /* Accounting-Request  */
  89 #define RADCMD_ACCOUN_RES   5 /* Accounting-Response */
  90 #define RADCMD_ACCESS_CHA  11 /* Access-Challenge    */
  91 #define RADCMD_STATUS_SER  12 /* Status-Server       */
  92 #define RADCMD_STATUS_CLI  13 /* Status-Client       */
  93 #define RADCMD_DISCON_REQ  40 /* Disconnect-Request  */
  94 #define RADCMD_DISCON_ACK  41 /* Disconnect-ACK      */
  95 #define RADCMD_DISCON_NAK  42 /* Disconnect-NAK      */
  96 #define RADCMD_COA_REQ     43 /* CoA-Request         */
  97 #define RADCMD_COA_ACK     44 /* CoA-ACK             */
  98 #define RADCMD_COA_NAK     45 /* CoA-NAK             */
  99 #define RADCMD_RESERVED   255 /* Reserved            */
 100
 101 static const struct tok radius_command_values[] = {
 102     { RADCMD_ACCESS_REQ, "Access-Request" },
 103     { RADCMD_ACCESS_ACC, "Access-Accept" },
 104     { RADCMD_ACCESS_REJ, "Access-Reject" },
 105     { RADCMD_ACCOUN_REQ, "Accounting-Request" },
 106     { RADCMD_ACCOUN_RES, "Accounting-Response" },
 107     { RADCMD_ACCESS_CHA, "Access-Challenge" },
 108     { RADCMD_STATUS_SER, "Status-Server" },
 109     { RADCMD_STATUS_CLI, "Status-Client" },
 110     { RADCMD_DISCON_REQ, "Disconnect-Request" },
 111     { RADCMD_DISCON_ACK, "Disconnect-ACK" },
 112     { RADCMD_DISCON_NAK, "Disconnect-NAK" },
 113     { RADCMD_COA_REQ,    "CoA-Request" },
 114     { RADCMD_COA_ACK,    "CoA-ACK" },
 115     { RADCMD_COA_NAK,    "CoA-NAK" },
 116     { RADCMD_RESERVED,   "Reserved" },
 117     { 0, NULL}
 118 };
 119
 120 /********************************/
 121 /* Begin Radius Attribute types */
 122 /********************************/
 123 #define SERV_TYPE    6
 124 #define FRM_IPADDR   8
 125 #define LOG_IPHOST  14
 126 #define LOG_SERVICE 15
 127 #define FRM_IPX     23
 128 #define SESSION_TIMEOUT   27
 129 #define IDLE_TIMEOUT      28
 130 #define FRM_ATALK_LINK    37
 131 #define FRM_ATALK_NETWORK 38
 132
 133 #define ACCT_DELAY        41
 134 #define ACCT_SESSION_TIME 46
 135
 136 #define EGRESS_VLAN_ID   56
 137 #define EGRESS_VLAN_NAME 58
 138
 139 #define TUNNEL_TYPE        64
 140 #define TUNNEL_MEDIUM      65
 141 #define TUNNEL_CLIENT_END  66
 142 #define TUNNEL_SERVER_END  67
 143 #define TUNNEL_PASS        69
 144
 145 #define ARAP_PASS          70
 146 #define ARAP_FEATURES      71
 147
 148 #define TUNNEL_PRIV_GROUP  81
 149 #define TUNNEL_ASSIGN_ID   82
 150 #define TUNNEL_PREFERENCE  83
 151
 152 #define ARAP_CHALLENGE_RESP 84
 153 #define ACCT_INT_INTERVAL   85
 154
 155 #define TUNNEL_CLIENT_AUTH 90
 156 #define TUNNEL_SERVER_AUTH 91
 157 /********************************/
 158 /* End Radius Attribute types */
 159 /********************************/
 160
 161 #define RFC4675_TAGGED   0x31
 162 #define RFC4675_UNTAGGED 0x32
 163
 164 static const struct tok rfc4675_tagged[] = {
 165     { RFC4675_TAGGED,   "Tagged" },
 166     { RFC4675_UNTAGGED, "Untagged" },
 167     { 0, NULL}
 168 };
 169
 170
 171 static void print_attr_string(netdissect_options *, register const u_char *, u_int, u_short );
 172 static void print_attr_num(netdissect_options *, register const u_char *, u_int, u_short );
 173 static void print_vendor_attr(netdissect_options *, register const u_char *, u_int, u_short );
 174 static void print_attr_address(netdissect_options *, register const u_char *, u_int, u_short);
 175 static void print_attr_time(netdissect_options *, register const u_char *, u_int, u_short);
 176 static void print_attr_strange(netdissect_options *, register const u_char *, u_int, u_short);
 177
 178
 179 struct radius_hdr { uint8_t  code; /* Radius packet code  */
 180                     uint8_t  id;   /* Radius packet id    */
 181                     uint16_t len;  /* Radius total length */
 182                     uint8_t  auth[16]; /* Authenticator   */
 183                   };
 184
 185 #define MIN_RADIUS_LEN  20
 186
 187 struct radius_attr { uint8_t type; /* Attribute type   */
 188                      uint8_t len;  /* Attribute length */
 189                    };
 190
 191
 192 /* Service-Type Attribute standard values */
 193 static const char *serv_type[]={ NULL,
 194                                 "Login",
 195                                 "Framed",
 196                                 "Callback Login",
 197                                 "Callback Framed",
 198                                 "Outbound",
 199                                 "Administrative",
 200                                 "NAS Prompt",
 201                                 "Authenticate Only",
 202                                 "Callback NAS Prompt",
 203                                 "Call Check",
 204                                 "Callback Administrative",
 205                                };
 206
 207 /* Framed-Protocol Attribute standard values */
 208 static const char *frm_proto[]={ NULL,
 209                                  "PPP",
 210                                  "SLIP",
 211                                  "ARAP",
 212                                  "Gandalf proprietary",
 213                                  "Xylogics IPX/SLIP",
 214                                  "X.75 Synchronous",
 215                                };
 216
 217 /* Framed-Routing Attribute standard values */
 218 static const char *frm_routing[]={ "None",
 219                                    "Send",
 220                                    "Listen",
 221                                    "Send&Listen",
 222                                  };
 223
 224 /* Framed-Compression Attribute standard values */
 225 static const char *frm_comp[]={ "None",
 226                                 "VJ TCP/IP",
 227                                 "IPX",
 228                                 "Stac-LZS",
 229                               };
 230
 231 /* Login-Service Attribute standard values */
 232 static const char *login_serv[]={ "Telnet",
 233                                   "Rlogin",
 234                                   "TCP Clear",
 235                                   "PortMaster(proprietary)",
 236                                   "LAT",
 237                                   "X.25-PAD",
 238                                   "X.25-T3POS",
 239                                   "Unassigned",
 240                                   "TCP Clear Quiet",
 241                                 };
 242
 243
 244 /* Termination-Action Attribute standard values */
 245 static const char *term_action[]={ "Default",
 246                                    "RADIUS-Request",
 247                                  };
 248
 249 /* Ingress-Filters Attribute standard values */
 250 static const char *ingress_filters[]={ NULL,
 251                                        "Enabled",
 252                                        "Disabled",
 253                                      };
 254
 255 /* NAS-Port-Type Attribute standard values */
 256 static const char *nas_port_type[]={ "Async",
 257                                      "Sync",
 258                                      "ISDN Sync",
 259                                      "ISDN Async V.120",
 260                                      "ISDN Async V.110",
 261                                      "Virtual",
 262                                      "PIAFS",
 263                                      "HDLC Clear Channel",
 264                                      "X.25",
 265                                      "X.75",
 266                                      "G.3 Fax",
 267                                      "SDSL",
 268                                      "ADSL-CAP",
 269                                      "ADSL-DMT",
 270                                      "ISDN-DSL",
 271                                      "Ethernet",
 272                                      "xDSL",
 273                                      "Cable",
 274                                      "Wireless - Other",
 275                                      "Wireless - IEEE 802.11",
 276                                    };
 277
 278 /* Acct-Status-Type Accounting Attribute standard values */
 279 static const char *acct_status[]={ NULL,
 280                                    "Start",
 281                                    "Stop",
 282                                    "Interim-Update",
 283                                    "Unassigned",
 284                                    "Unassigned",
 285                                    "Unassigned",
 286                                    "Accounting-On",
 287                                    "Accounting-Off",
 288                                    "Tunnel-Start",
 289                                    "Tunnel-Stop",
 290                                    "Tunnel-Reject",
 291                                    "Tunnel-Link-Start",
 292                                    "Tunnel-Link-Stop",
 293                                    "Tunnel-Link-Reject",
 294                                    "Failed",
 295                                  };
 296
 297 /* Acct-Authentic Accounting Attribute standard values */
 298 static const char *acct_auth[]={ NULL,
 299                                  "RADIUS",
 300                                  "Local",
 301                                  "Remote",
 302                                };
 303
 304 /* Acct-Terminate-Cause Accounting Attribute standard values */
 305 static const char *acct_term[]={ NULL,
 306                                  "User Request",
 307                                  "Lost Carrier",
 308                                  "Lost Service",
 309                                  "Idle Timeout",
 310                                  "Session Timeout",
 311                                  "Admin Reset",
 312                                  "Admin Reboot",
 313                                  "Port Error",
 314                                  "NAS Error",
 315                                  "NAS Request",
 316                                  "NAS Reboot",
 317                                  "Port Unneeded",
 318                                  "Port Preempted",
 319                                  "Port Suspended",
 320                                  "Service Unavailable",
 321                                  "Callback",
 322                                  "User Error",
 323                                  "Host Request",
 324                                };
 325
 326 /* Tunnel-Type Attribute standard values */
 327 static const char *tunnel_type[]={ NULL,
 328                                    "PPTP",
 329                                    "L2F",
 330                                    "L2TP",
 331                                    "ATMP",
 332                                    "VTP",
 333                                    "AH",
 334                                    "IP-IP",
 335                                    "MIN-IP-IP",
 336                                    "ESP",
 337                                    "GRE",
 338                                    "DVS",
 339                                    "IP-in-IP Tunneling",
 340                                    "VLAN",
 341                                  };
 342
 343 /* Tunnel-Medium-Type Attribute standard values */
 344 static const char *tunnel_medium[]={ NULL,
 345                                      "IPv4",
 346                                      "IPv6",
 347                                      "NSAP",
 348                                      "HDLC",
 349                                      "BBN 1822",
 350                                      "802",
 351                                      "E.163",
 352                                      "E.164",
 353                                      "F.69",
 354                                      "X.121",
 355                                      "IPX",
 356                                      "Appletalk",
 357                                      "Decnet IV",
 358                                      "Banyan Vines",
 359                                      "E.164 with NSAP subaddress",
 360                                    };
 361
 362 /* ARAP-Zone-Access Attribute standard values */
 363 static const char *arap_zone[]={ NULL,
 364                                  "Only access to dfl zone",
 365                                  "Use zone filter inc.",
 366                                  "Not used",
 367                                  "Use zone filter exc.",
 368                                };
 369
 370 static const char *prompt[]={ "No Echo",
 371                               "Echo",
 372                             };
 373
 374
 375 static struct attrtype {
 376                   const char *name;      /* Attribute name                 */
 377                   const char **subtypes; /* Standard Values (if any)       */
 378                   u_char siz_subtypes;   /* Size of total standard values  */
 379                   u_char first_subtype;  /* First standard value is 0 or 1 */
 380                   void (*print_func)(netdissect_options *, register const u_char *, u_int, u_short);
 381                 } attr_type[]=
 382   {
 383      { NULL,                              NULL, 0, 0, NULL               },
 384      { "User-Name",                       NULL, 0, 0, print_attr_string  },
 385      { "User-Password",                   NULL, 0, 0, NULL               },
 386      { "CHAP-Password",                   NULL, 0, 0, NULL               },
 387      { "NAS-IP-Address",                  NULL, 0, 0, print_attr_address },
 388      { "NAS-Port",                        NULL, 0, 0, print_attr_num     },
 389      { "Service-Type",                    serv_type, TAM_SIZE(serv_type)-1, 1, print_attr_num },
 390      { "Framed-Protocol",                 frm_proto, TAM_SIZE(frm_proto)-1, 1, print_attr_num },
 391      { "Framed-IP-Address",               NULL, 0, 0, print_attr_address },
 392      { "Framed-IP-Netmask",               NULL, 0, 0, print_attr_address },
 393      { "Framed-Routing",                  frm_routing, TAM_SIZE(frm_routing), 0, print_attr_num },
 394      { "Filter-Id",                       NULL, 0, 0, print_attr_string  },
 395      { "Framed-MTU",                      NULL, 0, 0, print_attr_num     },
 396      { "Framed-Compression",              frm_comp, TAM_SIZE(frm_comp),   0, print_attr_num },
 397      { "Login-IP-Host",                   NULL, 0, 0, print_attr_address },
 398      { "Login-Service",                   login_serv, TAM_SIZE(login_serv), 0, print_attr_num },
 399      { "Login-TCP-Port",                  NULL, 0, 0, print_attr_num     },
 400      { "Unassigned",                      NULL, 0, 0, NULL }, /*17*/
 401      { "Reply-Message",                   NULL, 0, 0, print_attr_string },
 402      { "Callback-Number",                 NULL, 0, 0, print_attr_string },
 403      { "Callback-Id",                     NULL, 0, 0, print_attr_string },
 404      { "Unassigned",                      NULL, 0, 0, NULL }, /*21*/
 405      { "Framed-Route",                    NULL, 0, 0, print_attr_string },
 406      { "Framed-IPX-Network",              NULL, 0, 0, print_attr_num    },
 407      { "State",                           NULL, 0, 0, print_attr_string },
 408      { "Class",                           NULL, 0, 0, print_attr_string },
 409      { "Vendor-Specific",                 NULL, 0, 0, print_vendor_attr },
 410      { "Session-Timeout",                 NULL, 0, 0, print_attr_num    },
 411      { "Idle-Timeout",                    NULL, 0, 0, print_attr_num    },
 412      { "Termination-Action",              term_action, TAM_SIZE(term_action), 0, print_attr_num },
 413      { "Called-Station-Id",               NULL, 0, 0, print_attr_string },
 414      { "Calling-Station-Id",              NULL, 0, 0, print_attr_string },
 415      { "NAS-Identifier",                  NULL, 0, 0, print_attr_string },
 416      { "Proxy-State",                     NULL, 0, 0, print_attr_string },
 417      { "Login-LAT-Service",               NULL, 0, 0, print_attr_string },
 418      { "Login-LAT-Node",                  NULL, 0, 0, print_attr_string },
 419      { "Login-LAT-Group",                 NULL, 0, 0, print_attr_string },
 420      { "Framed-AppleTalk-Link",           NULL, 0, 0, print_attr_num    },
 421      { "Framed-AppleTalk-Network",        NULL, 0, 0, print_attr_num    },
 422      { "Framed-AppleTalk-Zone",           NULL, 0, 0, print_attr_string },
 423      { "Acct-Status-Type",                acct_status, TAM_SIZE(acct_status)-1, 1, print_attr_num },
 424      { "Acct-Delay-Time",                 NULL, 0, 0, print_attr_num    },
 425      { "Acct-Input-Octets",               NULL, 0, 0, print_attr_num    },
 426      { "Acct-Output-Octets",              NULL, 0, 0, print_attr_num    },
 427      { "Acct-Session-Id",                 NULL, 0, 0, print_attr_string },
 428      { "Acct-Authentic",                  acct_auth, TAM_SIZE(acct_auth)-1, 1, print_attr_num },
 429      { "Acct-Session-Time",               NULL, 0, 0, print_attr_num },
 430      { "Acct-Input-Packets",              NULL, 0, 0, print_attr_num },
 431      { "Acct-Output-Packets",             NULL, 0, 0, print_attr_num },
 432      { "Acct-Terminate-Cause",            acct_term, TAM_SIZE(acct_term)-1, 1, print_attr_num },
 433      { "Acct-Multi-Session-Id",           NULL, 0, 0, print_attr_string },
 434      { "Acct-Link-Count",                 NULL, 0, 0, print_attr_num },
 435      { "Acct-Input-Gigawords",            NULL, 0, 0, print_attr_num },
 436      { "Acct-Output-Gigawords",           NULL, 0, 0, print_attr_num },
 437      { "Unassigned",                      NULL, 0, 0, NULL }, /*54*/
 438      { "Event-Timestamp",                 NULL, 0, 0, print_attr_time },
 439      { "Egress-VLANID",                   NULL, 0, 0, print_attr_num },
 440      { "Ingress-Filters",                 ingress_filters, TAM_SIZE(ingress_filters)-1, 1, print_attr_num },
 441      { "Egress-VLAN-Name",                NULL, 0, 0, print_attr_string },
 442      { "User-Priority-Table",             NULL, 0, 0, NULL },
 443      { "CHAP-Challenge",                  NULL, 0, 0, print_attr_string },
 444      { "NAS-Port-Type",                   nas_port_type, TAM_SIZE(nas_port_type), 0, print_attr_num },
 445      { "Port-Limit",                      NULL, 0, 0, print_attr_num },
 446      { "Login-LAT-Port",                  NULL, 0, 0, print_attr_string }, /*63*/
 447      { "Tunnel-Type",                     tunnel_type, TAM_SIZE(tunnel_type)-1, 1, print_attr_num },
 448      { "Tunnel-Medium-Type",              tunnel_medium, TAM_SIZE(tunnel_medium)-1, 1, print_attr_num },
 449      { "Tunnel-Client-Endpoint",          NULL, 0, 0, print_attr_string },
 450      { "Tunnel-Server-Endpoint",          NULL, 0, 0, print_attr_string },
 451      { "Acct-Tunnel-Connection",          NULL, 0, 0, print_attr_string },
 452      { "Tunnel-Password",                 NULL, 0, 0, print_attr_string  },
 453      { "ARAP-Password",                   NULL, 0, 0, print_attr_strange },
 454      { "ARAP-Features",                   NULL, 0, 0, print_attr_strange },
 455      { "ARAP-Zone-Access",                arap_zone, TAM_SIZE(arap_zone)-1, 1, print_attr_num }, /*72*/
 456      { "ARAP-Security",                   NULL, 0, 0, print_attr_string },
 457      { "ARAP-Security-Data",              NULL, 0, 0, print_attr_string },
 458      { "Password-Retry",                  NULL, 0, 0, print_attr_num    },
 459      { "Prompt",                          prompt, TAM_SIZE(prompt), 0, print_attr_num },
 460      { "Connect-Info",                    NULL, 0, 0, print_attr_string   },
 461      { "Configuration-Token",             NULL, 0, 0, print_attr_string   },
 462      { "EAP-Message",                     NULL, 0, 0, print_attr_string   },
 463      { "Message-Authenticator",           NULL, 0, 0, print_attr_string }, /*80*/
 464      { "Tunnel-Private-Group-ID",         NULL, 0, 0, print_attr_string },
 465      { "Tunnel-Assignment-ID",            NULL, 0, 0, print_attr_string },
 466      { "Tunnel-Preference",               NULL, 0, 0, print_attr_num    },
 467      { "ARAP-Challenge-Response",         NULL, 0, 0, print_attr_strange },
 468      { "Acct-Interim-Interval",           NULL, 0, 0, print_attr_num     },
 469      { "Acct-Tunnel-Packets-Lost",        NULL, 0, 0, print_attr_num }, /*86*/
 470      { "NAS-Port-Id",                     NULL, 0, 0, print_attr_string },
 471      { "Framed-Pool",                     NULL, 0, 0, print_attr_string },
 472      { "CUI",                             NULL, 0, 0, print_attr_string },
 473      { "Tunnel-Client-Auth-ID",           NULL, 0, 0, print_attr_string },
 474      { "Tunnel-Server-Auth-ID",           NULL, 0, 0, print_attr_string },
 475      { "Unassigned",                      NULL, 0, 0, NULL }, /*92*/
 476      { "Unassigned",                      NULL, 0, 0, NULL }  /*93*/
 477   };
 478
 479
 480 /*****************************/
 481 /* Print an attribute string */
 482 /* value pointed by 'data'   */
 483 /* and 'length' size.        */
 484 /*****************************/
 485 /* Returns nothing.          */
 486 /*****************************/
 487 static void
 488 print_attr_string(netdissect_options *ndo,
 489                   register const u_char *data, u_int length, u_short attr_code)
 490 {
 491    register u_int i;
 492
 493    ND_TCHECK2(data[0],length);
 494
 495    switch(attr_code)
 496    {
 497       case TUNNEL_PASS:
 498            if (length < 3)
 499               goto trunc;
 500            if (*data && (*data <=0x1F) )
 501               ND_PRINT((ndo, "Tag[%u] ", *data));
 502            else
 503               ND_PRINT((ndo, "Tag[Unused] "));
 504            data++;
 505            length--;
 506            ND_PRINT((ndo, "Salt %u ", EXTRACT_16BITS(data)));
 507            data+=2;
 508            length-=2;
 509         break;
 510       case TUNNEL_CLIENT_END:
 511       case TUNNEL_SERVER_END:
 512       case TUNNEL_PRIV_GROUP:
 513       case TUNNEL_ASSIGN_ID:
 514       case TUNNEL_CLIENT_AUTH:
 515       case TUNNEL_SERVER_AUTH:
 516            if (*data <= 0x1F)
 517            {
 518               if (length < 1)
 519                  goto trunc;
 520               if (*data)
 521                 ND_PRINT((ndo, "Tag[%u] ", *data));
 522               else
 523                 ND_PRINT((ndo, "Tag[Unused] "));
 524               data++;
 525               length--;
 526            }
 527         break;
 528       case EGRESS_VLAN_NAME:
 529            if (length < 1)
 530               goto trunc;
 531            ND_PRINT((ndo, "%s (0x%02x) ",
 532                   tok2str(rfc4675_tagged,"Unknown tag",*data),
 533                   *data));
 534            data++;
 535            length--;
 536         break;
 537    }
 538
 539    for (i=0; i < length && *data; i++, data++)
 540        ND_PRINT((ndo, "%c", (*data < 32 || *data > 126) ? '.' : *data));
 541
 542    return;
 543
 544    trunc:
 545       ND_PRINT((ndo, "%s", tstr));
 546 }
 547
 548 /*
 549  * print vendor specific attributes
 550  */
 551 static void
 552 print_vendor_attr(netdissect_options *ndo,
 553                   register const u_char *data, u_int length, u_short attr_code _U_)
 554 {
 555     u_int idx;
 556     u_int vendor_id;
 557     u_int vendor_type;
 558     u_int vendor_length;
 559
 560     if (length < 4)
 561         goto trunc;
 562     ND_TCHECK2(*data, 4);
 563     vendor_id = EXTRACT_32BITS(data);
 564     data+=4;
 565     length-=4;
 566
 567     ND_PRINT((ndo, "Vendor: %s (%u)",
 568            tok2str(smi_values,"Unknown",vendor_id),
 569            vendor_id));
 570
 571     while (length >= 2) {
 572         ND_TCHECK2(*data, 2);
 573
 574         vendor_type = *(data);
 575         vendor_length = *(data+1);
 576
 577         if (vendor_length < 2)
 578         {
 579             ND_PRINT((ndo, "\n\t    Vendor Attribute: %u, Length: %u (bogus, must be >= 2)",
 580                    vendor_type,
 581                    vendor_length));
 582             return;
 583         }
 584         if (vendor_length > length)
 585         {
 586             ND_PRINT((ndo, "\n\t    Vendor Attribute: %u, Length: %u (bogus, goes past end of vendor-specific attribute)",
 587                    vendor_type,
 588                    vendor_length));
 589             return;
 590         }
 591         data+=2;
 592         vendor_length-=2;
 593         length-=2;
 594         ND_TCHECK2(*data, vendor_length);
 595
 596         ND_PRINT((ndo, "\n\t    Vendor Attribute: %u, Length: %u, Value: ",
 597                vendor_type,
 598                vendor_length));
 599         for (idx = 0; idx < vendor_length ; idx++, data++)
 600             ND_PRINT((ndo, "%c", (*data < 32 || *data > 126) ? '.' : *data));
 601         length-=vendor_length;
 602     }
 603     return;
 604
 605    trunc:
 606      ND_PRINT((ndo, "%s", tstr));
 607 }
 608
 609 /******************************/
 610 /* Print an attribute numeric */
 611 /* value pointed by 'data'    */
 612 /* and 'length' size.         */
 613 /******************************/
 614 /* Returns nothing.           */
 615 /******************************/
 616 static void
 617 print_attr_num(netdissect_options *ndo,
 618                register const u_char *data, u_int length, u_short attr_code)
 619 {
 620    uint32_t timeout;
 621
 622    if (length != 4)
 623    {
 624        ND_PRINT((ndo, "ERROR: length %u != 4", length));
 625        return;
 626    }
 627
 628    ND_TCHECK2(data[0],4);
 629                           /* This attribute has standard values */
 630    if (attr_type[attr_code].siz_subtypes)
 631    {
 632       static const char **table;
 633       uint32_t data_value;
 634       table = attr_type[attr_code].subtypes;
 635
 636       if ( (attr_code == TUNNEL_TYPE) || (attr_code == TUNNEL_MEDIUM) )
 637       {
 638          if (!*data)
 639             ND_PRINT((ndo, "Tag[Unused] "));
 640          else
 641             ND_PRINT((ndo, "Tag[%d] ", *data));
 642          data++;
 643          data_value = EXTRACT_24BITS(data);
 644       }
 645       else
 646       {
 647          data_value = EXTRACT_32BITS(data);
 648       }
 649       if ( data_value <= (uint32_t)(attr_type[attr_code].siz_subtypes - 1 +
 650             attr_type[attr_code].first_subtype) &&
 651            data_value >= attr_type[attr_code].first_subtype )
 652          ND_PRINT((ndo, "%s", table[data_value]));
 653       else
 654          ND_PRINT((ndo, "#%u", data_value));
 655    }
 656    else
 657    {
 658       switch(attr_code) /* Be aware of special cases... */
 659       {
 660         case FRM_IPX:
 661              if (EXTRACT_32BITS( data) == 0xFFFFFFFE )
 662                 ND_PRINT((ndo, "NAS Select"));
 663              else
 664                 ND_PRINT((ndo, "%d", EXTRACT_32BITS(data)));
 665           break;
 666
 667         case SESSION_TIMEOUT:
 668         case IDLE_TIMEOUT:
 669         case ACCT_DELAY:
 670         case ACCT_SESSION_TIME:
 671         case ACCT_INT_INTERVAL:
 672              timeout = EXTRACT_32BITS( data);
 673              if ( timeout < 60 )
 674                 ND_PRINT((ndo,  "%02d secs", timeout));
 675              else
 676              {
 677                 if ( timeout < 3600 )
 678                    ND_PRINT((ndo,  "%02d:%02d min",
 679                           timeout / 60, timeout % 60));
 680                 else
 681                    ND_PRINT((ndo, "%02d:%02d:%02d hours",
 682                           timeout / 3600, (timeout % 3600) / 60,
 683                           timeout % 60));
 684              }
 685           break;
 686
 687         case FRM_ATALK_LINK:
 688              if (EXTRACT_32BITS(data) )
 689                 ND_PRINT((ndo, "%d", EXTRACT_32BITS(data)));
 690              else
 691                 ND_PRINT((ndo, "Unnumbered"));
 692           break;
 693
 694         case FRM_ATALK_NETWORK:
 695              if (EXTRACT_32BITS(data) )
 696                 ND_PRINT((ndo, "%d", EXTRACT_32BITS(data)));
 697              else
 698                 ND_PRINT((ndo, "NAS assigned"));
 699           break;
 700
 701         case TUNNEL_PREFERENCE:
 702             if (*data)
 703                ND_PRINT((ndo, "Tag[%d] ", *data));
 704             else
 705                ND_PRINT((ndo, "Tag[Unused] "));
 706             data++;
 707             ND_PRINT((ndo, "%d", EXTRACT_24BITS(data)));
 708           break;
 709
 710         case EGRESS_VLAN_ID:
 711             ND_PRINT((ndo, "%s (0x%02x) ",
 712                    tok2str(rfc4675_tagged,"Unknown tag",*data),
 713                    *data));
 714             data++;
 715             ND_PRINT((ndo, "%d", EXTRACT_24BITS(data)));
 716           break;
 717
 718         default:
 719              ND_PRINT((ndo, "%d", EXTRACT_32BITS(data)));
 720           break;
 721
 722       } /* switch */
 723
 724    } /* if-else */
 725
 726    return;
 727
 728    trunc:
 729      ND_PRINT((ndo, "%s", tstr));
 730 }
 731
 732 /*****************************/
 733 /* Print an attribute IPv4   */
 734 /* address value pointed by  */
 735 /* 'data' and 'length' size. */
 736 /*****************************/
 737 /* Returns nothing.          */
 738 /*****************************/
 739 static void
 740 print_attr_address(netdissect_options *ndo,
 741                    register const u_char *data, u_int length, u_short attr_code)
 742 {
 743    if (length != 4)
 744    {
 745        ND_PRINT((ndo, "ERROR: length %u != 4", length));
 746        return;
 747    }
 748
 749    ND_TCHECK2(data[0],4);
 750
 751    switch(attr_code)
 752    {
 753       case FRM_IPADDR:
 754       case LOG_IPHOST:
 755            if (EXTRACT_32BITS(data) == 0xFFFFFFFF )
 756               ND_PRINT((ndo, "User Selected"));
 757            else
 758               if (EXTRACT_32BITS(data) == 0xFFFFFFFE )
 759                  ND_PRINT((ndo, "NAS Select"));
 760               else
 761                  ND_PRINT((ndo, "%s",ipaddr_string(ndo, data)));
 762       break;
 763
 764       default:
 765           ND_PRINT((ndo, "%s", ipaddr_string(ndo, data)));
 766       break;
 767    }
 768
 769    return;
 770
 771    trunc:
 772      ND_PRINT((ndo, "%s", tstr));
 773 }
 774
 775 /*************************************/
 776 /* Print an attribute of 'secs since */
 777 /* January 1, 1970 00:00 UTC' value  */
 778 /* pointed by 'data' and 'length'    */
 779 /* size.                             */
 780 /*************************************/
 781 /* Returns nothing.                  */
 782 /*************************************/
 783 static void
 784 print_attr_time(netdissect_options *ndo,
 785                 register const u_char *data, u_int length, u_short attr_code _U_)
 786 {
 787    time_t attr_time;
 788    char string[26];
 789
 790    if (length != 4)
 791    {
 792        ND_PRINT((ndo, "ERROR: length %u != 4", length));
 793        return;
 794    }
 795
 796    ND_TCHECK2(data[0],4);
 797
 798    attr_time = EXTRACT_32BITS(data);
 799    strlcpy(string, ctime(&attr_time), sizeof(string));
 800    /* Get rid of the newline */
 801    string[24] = '\0';
 802    ND_PRINT((ndo, "%.24s", string));
 803    return;
 804
 805    trunc:
 806      ND_PRINT((ndo, "%s", tstr));
 807 }
 808
 809 /***********************************/
 810 /* Print an attribute of 'strange' */
 811 /* data format pointed by 'data'   */
 812 /* and 'length' size.              */
 813 /***********************************/
 814 /* Returns nothing.                */
 815 /***********************************/
 816 static void
 817 print_attr_strange(netdissect_options *ndo,
 818                    register const u_char *data, u_int length, u_short attr_code)
 819 {
 820    u_short len_data;
 821
 822    switch(attr_code)
 823    {
 824       case ARAP_PASS:
 825            if (length != 16)
 826            {
 827                ND_PRINT((ndo, "ERROR: length %u != 16", length));
 828                return;
 829            }
 830            ND_PRINT((ndo, "User_challenge ("));
 831            ND_TCHECK2(data[0],8);
 832            len_data = 8;
 833            PRINT_HEX(len_data, data);
 834            ND_PRINT((ndo, ") User_resp("));
 835            ND_TCHECK2(data[0],8);
 836            len_data = 8;
 837            PRINT_HEX(len_data, data);
 838            ND_PRINT((ndo, ")"));
 839         break;
 840
 841       case ARAP_FEATURES:
 842            if (length != 14)
 843            {
 844                ND_PRINT((ndo, "ERROR: length %u != 14", length));
 845                return;
 846            }
 847            ND_TCHECK2(data[0],1);
 848            if (*data)
 849               ND_PRINT((ndo, "User can change password"));
 850            else
 851               ND_PRINT((ndo, "User cannot change password"));
 852            data++;
 853            ND_TCHECK2(data[0],1);
 854            ND_PRINT((ndo, ", Min password length: %d", *data));
 855            data++;
 856            ND_PRINT((ndo, ", created at: "));
 857            ND_TCHECK2(data[0],4);
 858            len_data = 4;
 859            PRINT_HEX(len_data, data);
 860            ND_PRINT((ndo, ", expires in: "));
 861            ND_TCHECK2(data[0],4);
 862            len_data = 4;
 863            PRINT_HEX(len_data, data);
 864            ND_PRINT((ndo, ", Current Time: "));
 865            ND_TCHECK2(data[0],4);
 866            len_data = 4;
 867            PRINT_HEX(len_data, data);
 868         break;
 869
 870       case ARAP_CHALLENGE_RESP:
 871            if (length < 8)
 872            {
 873                ND_PRINT((ndo, "ERROR: length %u != 8", length));
 874                return;
 875            }
 876            ND_TCHECK2(data[0],8);
 877            len_data = 8;
 878            PRINT_HEX(len_data, data);
 879         break;
 880    }
 881    return;
 882
 883    trunc:
 884      ND_PRINT((ndo, "%s", tstr));
 885 }
 886
 887 static void
 888 radius_attrs_print(netdissect_options *ndo,
 889                    register const u_char *attr, u_int length)
 890 {
 891    register const struct radius_attr *rad_attr = (const struct radius_attr *)attr;
 892    const char *attr_string;
 893
 894    while (length > 0)
 895    {
 896      if (length < 2)
 897         goto trunc;
 898      ND_TCHECK(*rad_attr);
 899
 900      if (rad_attr->type > 0 && rad_attr->type < TAM_SIZE(attr_type))
 901         attr_string = attr_type[rad_attr->type].name;
 902      else
 903         attr_string = "Unknown";
 904      if (rad_attr->len < 2)
 905      {
 906         ND_PRINT((ndo, "\n\t  %s Attribute (%u), length: %u (bogus, must be >= 2)",
 907                attr_string,
 908                rad_attr->type,
 909                rad_attr->len));
 910         return;
 911      }
 912      if (rad_attr->len > length)
 913      {
 914         ND_PRINT((ndo, "\n\t  %s Attribute (%u), length: %u (bogus, goes past end of packet)",
 915                attr_string,
 916                rad_attr->type,
 917                rad_attr->len));
 918         return;
 919      }
 920      ND_PRINT((ndo, "\n\t  %s Attribute (%u), length: %u, Value: ",
 921             attr_string,
 922             rad_attr->type,
 923             rad_attr->len));
 924
 925      if (rad_attr->type < TAM_SIZE(attr_type))
 926      {
 927          if (rad_attr->len > 2)
 928          {
 929              if ( attr_type[rad_attr->type].print_func )
 930                  (*attr_type[rad_attr->type].print_func)(
 931                      ndo, ((const u_char *)(rad_attr+1)),
 932                      rad_attr->len - 2, rad_attr->type);
 933          }
 934      }
 935      /* do we also want to see a hex dump ? */
 936      if (ndo->ndo_vflag> 1)
 937          print_unknown_data(ndo, (const u_char *)rad_attr+2, "\n\t    ", (rad_attr->len)-2);
 938
 939      length-=(rad_attr->len);
 940      rad_attr = (const struct radius_attr *)( ((const char *)(rad_attr))+rad_attr->len);
 941    }
 942    return;
 943
 944 trunc:
 945    ND_PRINT((ndo, "%s", tstr));
 946 }
 947
 948 void
 949 radius_print(netdissect_options *ndo,
 950              const u_char *dat, u_int length)
 951 {
 952    register const struct radius_hdr *rad;
 953    u_int len, auth_idx;
 954
 955    ND_TCHECK2(*dat, MIN_RADIUS_LEN);
 956    rad = (const struct radius_hdr *)dat;
 957    len = EXTRACT_16BITS(&rad->len);
 958
 959    if (len < MIN_RADIUS_LEN)
 960    {
 961           ND_PRINT((ndo, "%s", tstr));
 962           return;
 963    }
 964
 965    if (len > length)
 966           len = length;
 967
 968    if (ndo->ndo_vflag < 1) {
 969        ND_PRINT((ndo, "RADIUS, %s (%u), id: 0x%02x length: %u",
 970               tok2str(radius_command_values,"Unknown Command",rad->code),
 971               rad->code,
 972               rad->id,
 973               len));
 974        return;
 975    }
 976    else {
 977        ND_PRINT((ndo, "RADIUS, length: %u\n\t%s (%u), id: 0x%02x, Authenticator: ",
 978               len,
 979               tok2str(radius_command_values,"Unknown Command",rad->code),
 980               rad->code,
 981               rad->id));
 982
 983        for(auth_idx=0; auth_idx < 16; auth_idx++)
 984             ND_PRINT((ndo, "%02x", rad->auth[auth_idx]));
 985    }
 986
 987    if (len > MIN_RADIUS_LEN)
 988       radius_attrs_print(ndo, dat + MIN_RADIUS_LEN, len - MIN_RADIUS_LEN);
 989    return;
 990
 991 trunc:
 992    ND_PRINT((ndo, "%s", tstr));
 993 }