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