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SFLOW: Fix bounds checking
[tcpdump] / print-sflow.c
1 /*
2 * Copyright (c) 1998-2007 The TCPDUMP project
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that: (1) source code
6 * distributions retain the above copyright notice and this paragraph
7 * in its entirety, and (2) distributions including binary code include
8 * the above copyright notice and this paragraph in its entirety in
9 * the documentation or other materials provided with the distribution.
10 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND
11 * WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT
12 * LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
13 * FOR A PARTICULAR PURPOSE.
14 *
15 * The SFLOW protocol as per http://www.sflow.org/developers/specifications.php
16 *
17 * Original code by Carles Kishimoto <carles.kishimoto@gmail.com>
18 *
19 * Expansion and refactoring by Rick Jones <rick.jones2@hp.com>
20 */
21
22 #define NETDISSECT_REWORKED
23 #ifdef HAVE_CONFIG_H
24 #include "config.h"
25 #endif
26
27 #include <tcpdump-stdinc.h>
28
29 #include "interface.h"
30 #include "extract.h"
31 #include "addrtoname.h"
32
33 /*
34 * sFlow datagram
35 *
36 * 0 1 2 3
37 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
38 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
39 * | Sflow version (2,4,5) |
40 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
41 * | IP version (1 for IPv4 | 2 for IPv6) |
42 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
43 * | IP Address AGENT (4 or 16 bytes) |
44 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
45 * | Sub agent ID |
46 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
47 * | Datagram sequence number |
48 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
49 * | Switch uptime in ms |
50 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
51 * | num samples in datagram |
52 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
53 *
54 */
55
56 struct sflow_datagram_t {
57 uint8_t version[4];
58 uint8_t ip_version[4];
59 uint8_t agent[4];
60 uint8_t agent_id[4];
61 uint8_t seqnum[4];
62 uint8_t uptime[4];
63 uint8_t samples[4];
64 };
65
66 struct sflow_sample_header {
67 uint8_t format[4];
68 uint8_t len[4];
69 };
70
71 #define SFLOW_FLOW_SAMPLE 1
72 #define SFLOW_COUNTER_SAMPLE 2
73 #define SFLOW_EXPANDED_FLOW_SAMPLE 3
74 #define SFLOW_EXPANDED_COUNTER_SAMPLE 4
75
76 static const struct tok sflow_format_values[] = {
77 { SFLOW_FLOW_SAMPLE, "flow sample" },
78 { SFLOW_COUNTER_SAMPLE, "counter sample" },
79 { SFLOW_EXPANDED_FLOW_SAMPLE, "expanded flow sample" },
80 { SFLOW_EXPANDED_COUNTER_SAMPLE, "expanded counter sample" },
81 { 0, NULL}
82 };
83
84 struct sflow_flow_sample_t {
85 uint8_t seqnum[4];
86 uint8_t typesource[4];
87 uint8_t rate[4];
88 uint8_t pool[4];
89 uint8_t drops[4];
90 uint8_t in_interface[4];
91 uint8_t out_interface[4];
92 uint8_t records[4];
93
94 };
95
96 struct sflow_expanded_flow_sample_t {
97 uint8_t seqnum[4];
98 uint8_t type[4];
99 uint8_t index[4];
100 uint8_t rate[4];
101 uint8_t pool[4];
102 uint8_t drops[4];
103 uint8_t in_interface_format[4];
104 uint8_t in_interface_value[4];
105 uint8_t out_interface_format[4];
106 uint8_t out_interface_value[4];
107 uint8_t records[4];
108 };
109
110 #define SFLOW_FLOW_RAW_PACKET 1
111 #define SFLOW_FLOW_ETHERNET_FRAME 2
112 #define SFLOW_FLOW_IPV4_DATA 3
113 #define SFLOW_FLOW_IPV6_DATA 4
114 #define SFLOW_FLOW_EXTENDED_SWITCH_DATA 1001
115 #define SFLOW_FLOW_EXTENDED_ROUTER_DATA 1002
116 #define SFLOW_FLOW_EXTENDED_GATEWAY_DATA 1003
117 #define SFLOW_FLOW_EXTENDED_USER_DATA 1004
118 #define SFLOW_FLOW_EXTENDED_URL_DATA 1005
119 #define SFLOW_FLOW_EXTENDED_MPLS_DATA 1006
120 #define SFLOW_FLOW_EXTENDED_NAT_DATA 1007
121 #define SFLOW_FLOW_EXTENDED_MPLS_TUNNEL 1008
122 #define SFLOW_FLOW_EXTENDED_MPLS_VC 1009
123 #define SFLOW_FLOW_EXTENDED_MPLS_FEC 1010
124 #define SFLOW_FLOW_EXTENDED_MPLS_LVP_FEC 1011
125 #define SFLOW_FLOW_EXTENDED_VLAN_TUNNEL 1012
126
127 static const struct tok sflow_flow_type_values[] = {
128 { SFLOW_FLOW_RAW_PACKET, "Raw packet"},
129 { SFLOW_FLOW_ETHERNET_FRAME, "Ethernet frame"},
130 { SFLOW_FLOW_IPV4_DATA, "IPv4 Data"},
131 { SFLOW_FLOW_IPV6_DATA, "IPv6 Data"},
132 { SFLOW_FLOW_EXTENDED_SWITCH_DATA, "Extended Switch data"},
133 { SFLOW_FLOW_EXTENDED_ROUTER_DATA, "Extended Router data"},
134 { SFLOW_FLOW_EXTENDED_GATEWAY_DATA, "Extended Gateway data"},
135 { SFLOW_FLOW_EXTENDED_USER_DATA, "Extended User data"},
136 { SFLOW_FLOW_EXTENDED_URL_DATA, "Extended URL data"},
137 { SFLOW_FLOW_EXTENDED_MPLS_DATA, "Extended MPLS data"},
138 { SFLOW_FLOW_EXTENDED_NAT_DATA, "Extended NAT data"},
139 { SFLOW_FLOW_EXTENDED_MPLS_TUNNEL, "Extended MPLS tunnel"},
140 { SFLOW_FLOW_EXTENDED_MPLS_VC, "Extended MPLS VC"},
141 { SFLOW_FLOW_EXTENDED_MPLS_FEC, "Extended MPLS FEC"},
142 { SFLOW_FLOW_EXTENDED_MPLS_LVP_FEC, "Extended MPLS LVP FEC"},
143 { SFLOW_FLOW_EXTENDED_VLAN_TUNNEL, "Extended VLAN Tunnel"},
144 { 0, NULL}
145 };
146
147 #define SFLOW_HEADER_PROTOCOL_ETHERNET 1
148 #define SFLOW_HEADER_PROTOCOL_IPV4 11
149 #define SFLOW_HEADER_PROTOCOL_IPV6 12
150
151 static const struct tok sflow_flow_raw_protocol_values[] = {
152 { SFLOW_HEADER_PROTOCOL_ETHERNET, "Ethernet"},
153 { SFLOW_HEADER_PROTOCOL_IPV4, "IPv4"},
154 { SFLOW_HEADER_PROTOCOL_IPV6, "IPv6"},
155 { 0, NULL}
156 };
157
158 struct sflow_expanded_flow_raw_t {
159 uint8_t protocol[4];
160 uint8_t length[4];
161 uint8_t stripped_bytes[4];
162 uint8_t header_size[4];
163 };
164
165 struct sflow_ethernet_frame_t {
166 uint8_t length[4];
167 uint8_t src_mac[8];
168 uint8_t dst_mac[8];
169 uint8_t type[4];
170 };
171
172 struct sflow_extended_switch_data_t {
173 uint8_t src_vlan[4];
174 uint8_t src_pri[4];
175 uint8_t dst_vlan[4];
176 uint8_t dst_pri[4];
177 };
178
179 struct sflow_counter_record_t {
180 uint8_t format[4];
181 uint8_t length[4];
182 };
183
184 struct sflow_flow_record_t {
185 uint8_t format[4];
186 uint8_t length[4];
187 };
188
189 struct sflow_counter_sample_t {
190 uint8_t seqnum[4];
191 uint8_t typesource[4];
192 uint8_t records[4];
193 };
194
195 struct sflow_expanded_counter_sample_t {
196 uint8_t seqnum[4];
197 uint8_t type[4];
198 uint8_t index[4];
199 uint8_t records[4];
200 };
201
202 #define SFLOW_COUNTER_GENERIC 1
203 #define SFLOW_COUNTER_ETHERNET 2
204 #define SFLOW_COUNTER_TOKEN_RING 3
205 #define SFLOW_COUNTER_BASEVG 4
206 #define SFLOW_COUNTER_VLAN 5
207 #define SFLOW_COUNTER_PROCESSOR 1001
208
209 static const struct tok sflow_counter_type_values[] = {
210 { SFLOW_COUNTER_GENERIC, "Generic counter"},
211 { SFLOW_COUNTER_ETHERNET, "Ethernet counter"},
212 { SFLOW_COUNTER_TOKEN_RING, "Token ring counter"},
213 { SFLOW_COUNTER_BASEVG, "100 BaseVG counter"},
214 { SFLOW_COUNTER_VLAN, "Vlan counter"},
215 { SFLOW_COUNTER_PROCESSOR, "Processor counter"},
216 { 0, NULL}
217 };
218
219 #define SFLOW_IFACE_DIRECTION_UNKNOWN 0
220 #define SFLOW_IFACE_DIRECTION_FULLDUPLEX 1
221 #define SFLOW_IFACE_DIRECTION_HALFDUPLEX 2
222 #define SFLOW_IFACE_DIRECTION_IN 3
223 #define SFLOW_IFACE_DIRECTION_OUT 4
224
225 static const struct tok sflow_iface_direction_values[] = {
226 { SFLOW_IFACE_DIRECTION_UNKNOWN, "unknown"},
227 { SFLOW_IFACE_DIRECTION_FULLDUPLEX, "full-duplex"},
228 { SFLOW_IFACE_DIRECTION_HALFDUPLEX, "half-duplex"},
229 { SFLOW_IFACE_DIRECTION_IN, "in"},
230 { SFLOW_IFACE_DIRECTION_OUT, "out"},
231 { 0, NULL}
232 };
233
234 struct sflow_generic_counter_t {
235 uint8_t ifindex[4];
236 uint8_t iftype[4];
237 uint8_t ifspeed[8];
238 uint8_t ifdirection[4];
239 uint8_t ifstatus[4];
240 uint8_t ifinoctets[8];
241 uint8_t ifinunicastpkts[4];
242 uint8_t ifinmulticastpkts[4];
243 uint8_t ifinbroadcastpkts[4];
244 uint8_t ifindiscards[4];
245 uint8_t ifinerrors[4];
246 uint8_t ifinunkownprotos[4];
247 uint8_t ifoutoctets[8];
248 uint8_t ifoutunicastpkts[4];
249 uint8_t ifoutmulticastpkts[4];
250 uint8_t ifoutbroadcastpkts[4];
251 uint8_t ifoutdiscards[4];
252 uint8_t ifouterrors[4];
253 uint8_t ifpromiscmode[4];
254 };
255
256 struct sflow_ethernet_counter_t {
257 uint8_t alignerrors[4];
258 uint8_t fcserrors[4];
259 uint8_t single_collision_frames[4];
260 uint8_t multiple_collision_frames[4];
261 uint8_t test_errors[4];
262 uint8_t deferred_transmissions[4];
263 uint8_t late_collisions[4];
264 uint8_t excessive_collisions[4];
265 uint8_t mac_transmit_errors[4];
266 uint8_t carrier_sense_errors[4];
267 uint8_t frame_too_longs[4];
268 uint8_t mac_receive_errors[4];
269 uint8_t symbol_errors[4];
270 };
271
272 struct sflow_100basevg_counter_t {
273 uint8_t in_highpriority_frames[4];
274 uint8_t in_highpriority_octets[8];
275 uint8_t in_normpriority_frames[4];
276 uint8_t in_normpriority_octets[8];
277 uint8_t in_ipmerrors[4];
278 uint8_t in_oversized[4];
279 uint8_t in_data_errors[4];
280 uint8_t in_null_addressed_frames[4];
281 uint8_t out_highpriority_frames[4];
282 uint8_t out_highpriority_octets[8];
283 uint8_t transitioninto_frames[4];
284 uint8_t hc_in_highpriority_octets[8];
285 uint8_t hc_in_normpriority_octets[8];
286 uint8_t hc_out_highpriority_octets[8];
287 };
288
289 struct sflow_vlan_counter_t {
290 uint8_t vlan_id[4];
291 uint8_t octets[8];
292 uint8_t unicast_pkt[4];
293 uint8_t multicast_pkt[4];
294 uint8_t broadcast_pkt[4];
295 uint8_t discards[4];
296 };
297
298 static int
299 print_sflow_counter_generic(netdissect_options *ndo,
300 const u_char *pointer, u_int len) {
301
302 const struct sflow_generic_counter_t *sflow_gen_counter;
303
304 if (len < sizeof(struct sflow_generic_counter_t))
305 return 1;
306
307 sflow_gen_counter = (const struct sflow_generic_counter_t *)pointer;
308 ND_TCHECK(*sflow_gen_counter);
309 ND_PRINT((ndo, "\n\t ifindex %u, iftype %u, ifspeed %" PRIu64 ", ifdirection %u (%s)",
310 EXTRACT_32BITS(sflow_gen_counter->ifindex),
311 EXTRACT_32BITS(sflow_gen_counter->iftype),
312 EXTRACT_64BITS(sflow_gen_counter->ifspeed),
313 EXTRACT_32BITS(sflow_gen_counter->ifdirection),
314 tok2str(sflow_iface_direction_values, "Unknown",
315 EXTRACT_32BITS(sflow_gen_counter->ifdirection))));
316 ND_PRINT((ndo, "\n\t ifstatus %u, adminstatus: %s, operstatus: %s",
317 EXTRACT_32BITS(sflow_gen_counter->ifstatus),
318 EXTRACT_32BITS(sflow_gen_counter->ifstatus)&1 ? "up" : "down",
319 (EXTRACT_32BITS(sflow_gen_counter->ifstatus)>>1)&1 ? "up" : "down"));
320 ND_PRINT((ndo, "\n\t In octets %" PRIu64
321 ", unicast pkts %u, multicast pkts %u, broadcast pkts %u, discards %u",
322 EXTRACT_64BITS(sflow_gen_counter->ifinoctets),
323 EXTRACT_32BITS(sflow_gen_counter->ifinunicastpkts),
324 EXTRACT_32BITS(sflow_gen_counter->ifinmulticastpkts),
325 EXTRACT_32BITS(sflow_gen_counter->ifinbroadcastpkts),
326 EXTRACT_32BITS(sflow_gen_counter->ifindiscards)));
327 ND_PRINT((ndo, "\n\t In errors %u, unknown protos %u",
328 EXTRACT_32BITS(sflow_gen_counter->ifinerrors),
329 EXTRACT_32BITS(sflow_gen_counter->ifinunkownprotos)));
330 ND_PRINT((ndo, "\n\t Out octets %" PRIu64
331 ", unicast pkts %u, multicast pkts %u, broadcast pkts %u, discards %u",
332 EXTRACT_64BITS(sflow_gen_counter->ifoutoctets),
333 EXTRACT_32BITS(sflow_gen_counter->ifoutunicastpkts),
334 EXTRACT_32BITS(sflow_gen_counter->ifoutmulticastpkts),
335 EXTRACT_32BITS(sflow_gen_counter->ifoutbroadcastpkts),
336 EXTRACT_32BITS(sflow_gen_counter->ifoutdiscards)));
337 ND_PRINT((ndo, "\n\t Out errors %u, promisc mode %u",
338 EXTRACT_32BITS(sflow_gen_counter->ifouterrors),
339 EXTRACT_32BITS(sflow_gen_counter->ifpromiscmode)));
340
341 return 0;
342
343 trunc:
344 return 1;
345 }
346
347 static int
348 print_sflow_counter_ethernet(netdissect_options *ndo,
349 const u_char *pointer, u_int len){
350
351 const struct sflow_ethernet_counter_t *sflow_eth_counter;
352
353 if (len < sizeof(struct sflow_ethernet_counter_t))
354 return 1;
355
356 sflow_eth_counter = (const struct sflow_ethernet_counter_t *)pointer;
357 ND_TCHECK(*sflow_eth_counter);
358 ND_PRINT((ndo, "\n\t align errors %u, fcs errors %u, single collision %u, multiple collision %u, test error %u",
359 EXTRACT_32BITS(sflow_eth_counter->alignerrors),
360 EXTRACT_32BITS(sflow_eth_counter->fcserrors),
361 EXTRACT_32BITS(sflow_eth_counter->single_collision_frames),
362 EXTRACT_32BITS(sflow_eth_counter->multiple_collision_frames),
363 EXTRACT_32BITS(sflow_eth_counter->test_errors)));
364 ND_PRINT((ndo, "\n\t deferred %u, late collision %u, excessive collision %u, mac trans error %u",
365 EXTRACT_32BITS(sflow_eth_counter->deferred_transmissions),
366 EXTRACT_32BITS(sflow_eth_counter->late_collisions),
367 EXTRACT_32BITS(sflow_eth_counter->excessive_collisions),
368 EXTRACT_32BITS(sflow_eth_counter->mac_transmit_errors)));
369 ND_PRINT((ndo, "\n\t carrier error %u, frames too long %u, mac receive errors %u, symbol errors %u",
370 EXTRACT_32BITS(sflow_eth_counter->carrier_sense_errors),
371 EXTRACT_32BITS(sflow_eth_counter->frame_too_longs),
372 EXTRACT_32BITS(sflow_eth_counter->mac_receive_errors),
373 EXTRACT_32BITS(sflow_eth_counter->symbol_errors)));
374
375 return 0;
376
377 trunc:
378 return 1;
379 }
380
381 static int
382 print_sflow_counter_token_ring(netdissect_options *ndo _U_,
383 const u_char *pointer _U_, u_int len _U_) {
384
385 return 0;
386 }
387
388 static int
389 print_sflow_counter_basevg(netdissect_options *ndo,
390 const u_char *pointer, u_int len) {
391
392 const struct sflow_100basevg_counter_t *sflow_100basevg_counter;
393
394 if (len < sizeof(struct sflow_100basevg_counter_t))
395 return 1;
396
397 sflow_100basevg_counter = (const struct sflow_100basevg_counter_t *)pointer;
398 ND_TCHECK(*sflow_100basevg_counter);
399 ND_PRINT((ndo, "\n\t in high prio frames %u, in high prio octets %" PRIu64,
400 EXTRACT_32BITS(sflow_100basevg_counter->in_highpriority_frames),
401 EXTRACT_64BITS(sflow_100basevg_counter->in_highpriority_octets)));
402 ND_PRINT((ndo, "\n\t in norm prio frames %u, in norm prio octets %" PRIu64,
403 EXTRACT_32BITS(sflow_100basevg_counter->in_normpriority_frames),
404 EXTRACT_64BITS(sflow_100basevg_counter->in_normpriority_octets)));
405 ND_PRINT((ndo, "\n\t in ipm errors %u, oversized %u, in data errors %u, null addressed frames %u",
406 EXTRACT_32BITS(sflow_100basevg_counter->in_ipmerrors),
407 EXTRACT_32BITS(sflow_100basevg_counter->in_oversized),
408 EXTRACT_32BITS(sflow_100basevg_counter->in_data_errors),
409 EXTRACT_32BITS(sflow_100basevg_counter->in_null_addressed_frames)));
410 ND_PRINT((ndo, "\n\t out high prio frames %u, out high prio octets %" PRIu64
411 ", trans into frames %u",
412 EXTRACT_32BITS(sflow_100basevg_counter->out_highpriority_frames),
413 EXTRACT_64BITS(sflow_100basevg_counter->out_highpriority_octets),
414 EXTRACT_32BITS(sflow_100basevg_counter->transitioninto_frames)));
415 ND_PRINT((ndo, "\n\t in hc high prio octets %" PRIu64
416 ", in hc norm prio octets %" PRIu64
417 ", out hc high prio octets %" PRIu64,
418 EXTRACT_64BITS(sflow_100basevg_counter->hc_in_highpriority_octets),
419 EXTRACT_64BITS(sflow_100basevg_counter->hc_in_normpriority_octets),
420 EXTRACT_64BITS(sflow_100basevg_counter->hc_out_highpriority_octets)));
421
422 return 0;
423
424 trunc:
425 return 1;
426 }
427
428 static int
429 print_sflow_counter_vlan(netdissect_options *ndo,
430 const u_char *pointer, u_int len) {
431
432 const struct sflow_vlan_counter_t *sflow_vlan_counter;
433
434 if (len < sizeof(struct sflow_vlan_counter_t))
435 return 1;
436
437 sflow_vlan_counter = (const struct sflow_vlan_counter_t *)pointer;
438 ND_TCHECK(*sflow_vlan_counter);
439 ND_PRINT((ndo, "\n\t vlan_id %u, octets %" PRIu64
440 ", unicast_pkt %u, multicast_pkt %u, broadcast_pkt %u, discards %u",
441 EXTRACT_32BITS(sflow_vlan_counter->vlan_id),
442 EXTRACT_64BITS(sflow_vlan_counter->octets),
443 EXTRACT_32BITS(sflow_vlan_counter->unicast_pkt),
444 EXTRACT_32BITS(sflow_vlan_counter->multicast_pkt),
445 EXTRACT_32BITS(sflow_vlan_counter->broadcast_pkt),
446 EXTRACT_32BITS(sflow_vlan_counter->discards)));
447
448 return 0;
449
450 trunc:
451 return 1;
452 }
453
454 struct sflow_processor_counter_t {
455 uint8_t five_sec_util[4];
456 uint8_t one_min_util[4];
457 uint8_t five_min_util[4];
458 uint8_t total_memory[8];
459 uint8_t free_memory[8];
460 };
461
462 static int
463 print_sflow_counter_processor(netdissect_options *ndo,
464 const u_char *pointer, u_int len) {
465
466 const struct sflow_processor_counter_t *sflow_processor_counter;
467
468 if (len < sizeof(struct sflow_processor_counter_t))
469 return 1;
470
471 sflow_processor_counter = (const struct sflow_processor_counter_t *)pointer;
472 ND_TCHECK(*sflow_processor_counter);
473 ND_PRINT((ndo, "\n\t 5sec %u, 1min %u, 5min %u, total_mem %" PRIu64
474 ", total_mem %" PRIu64,
475 EXTRACT_32BITS(sflow_processor_counter->five_sec_util),
476 EXTRACT_32BITS(sflow_processor_counter->one_min_util),
477 EXTRACT_32BITS(sflow_processor_counter->five_min_util),
478 EXTRACT_64BITS(sflow_processor_counter->total_memory),
479 EXTRACT_64BITS(sflow_processor_counter->free_memory)));
480
481 return 0;
482
483 trunc:
484 return 1;
485 }
486
487 static int
488 sflow_print_counter_records(netdissect_options *ndo,
489 const u_char *pointer, u_int len, u_int records) {
490
491 u_int nrecords;
492 const u_char *tptr;
493 u_int tlen;
494 u_int counter_type;
495 u_int counter_len;
496 u_int enterprise;
497 const struct sflow_counter_record_t *sflow_counter_record;
498
499 nrecords = records;
500 tptr = pointer;
501 tlen = len;
502
503 while (nrecords > 0) {
504 /* do we have the "header?" */
505 if (tlen < sizeof(struct sflow_counter_record_t))
506 return 1;
507 sflow_counter_record = (const struct sflow_counter_record_t *)tptr;
508 ND_TCHECK(*sflow_counter_record);
509
510 enterprise = EXTRACT_32BITS(sflow_counter_record->format);
511 counter_type = enterprise & 0x0FFF;
512 enterprise = enterprise >> 20;
513 counter_len = EXTRACT_32BITS(sflow_counter_record->length);
514 ND_PRINT((ndo, "\n\t enterprise %u, %s (%u) length %u",
515 enterprise,
516 (enterprise == 0) ? tok2str(sflow_counter_type_values,"Unknown",counter_type) : "Unknown",
517 counter_type,
518 counter_len));
519
520 tptr += sizeof(struct sflow_counter_record_t);
521 tlen -= sizeof(struct sflow_counter_record_t);
522
523 if (tlen < counter_len)
524 return 1;
525 if (enterprise == 0) {
526 switch (counter_type) {
527 case SFLOW_COUNTER_GENERIC:
528 if (print_sflow_counter_generic(ndo, tptr, tlen))
529 return 1;
530 break;
531 case SFLOW_COUNTER_ETHERNET:
532 if (print_sflow_counter_ethernet(ndo, tptr, tlen))
533 return 1;
534 break;
535 case SFLOW_COUNTER_TOKEN_RING:
536 if (print_sflow_counter_token_ring(ndo, tptr,tlen))
537 return 1;
538 break;
539 case SFLOW_COUNTER_BASEVG:
540 if (print_sflow_counter_basevg(ndo, tptr, tlen))
541 return 1;
542 break;
543 case SFLOW_COUNTER_VLAN:
544 if (print_sflow_counter_vlan(ndo, tptr, tlen))
545 return 1;
546 break;
547 case SFLOW_COUNTER_PROCESSOR:
548 if (print_sflow_counter_processor(ndo, tptr, tlen))
549 return 1;
550 break;
551 default:
552 if (ndo->ndo_vflag <= 1)
553 print_unknown_data(ndo, tptr, "\n\t\t", counter_len);
554 break;
555 }
556 }
557 tptr += counter_len;
558 tlen -= counter_len;
559 nrecords--;
560
561 }
562
563 return 0;
564
565 trunc:
566 return 1;
567 }
568
569
570 static int
571 sflow_print_counter_sample(netdissect_options *ndo,
572 const u_char *pointer, u_int len) {
573
574 const struct sflow_counter_sample_t *sflow_counter_sample;
575 u_int nrecords;
576 u_int typesource;
577 u_int type;
578 u_int index;
579
580 if (len < sizeof(struct sflow_counter_sample_t))
581 return 1;
582
583 sflow_counter_sample = (const struct sflow_counter_sample_t *)pointer;
584 ND_TCHECK(*sflow_counter_sample);
585
586 typesource = EXTRACT_32BITS(sflow_counter_sample->typesource);
587 nrecords = EXTRACT_32BITS(sflow_counter_sample->records);
588 type = typesource >> 24;
589 index = typesource & 0x0FFF;
590
591 ND_PRINT((ndo, " seqnum %u, type %u, idx %u, records %u",
592 EXTRACT_32BITS(sflow_counter_sample->seqnum),
593 type,
594 index,
595 nrecords));
596
597 return sflow_print_counter_records(ndo, pointer + sizeof(struct sflow_counter_sample_t),
598 len - sizeof(struct sflow_counter_sample_t),
599 nrecords);
600
601 trunc:
602 return 1;
603 }
604
605 static int
606 sflow_print_expanded_counter_sample(netdissect_options *ndo,
607 const u_char *pointer, u_int len) {
608
609 const struct sflow_expanded_counter_sample_t *sflow_expanded_counter_sample;
610 u_int nrecords;
611
612
613 if (len < sizeof(struct sflow_expanded_counter_sample_t))
614 return 1;
615
616 sflow_expanded_counter_sample = (const struct sflow_expanded_counter_sample_t *)pointer;
617 ND_TCHECK(*sflow_expanded_counter_sample);
618
619 nrecords = EXTRACT_32BITS(sflow_expanded_counter_sample->records);
620
621 ND_PRINT((ndo, " seqnum %u, type %u, idx %u, records %u",
622 EXTRACT_32BITS(sflow_expanded_counter_sample->seqnum),
623 EXTRACT_32BITS(sflow_expanded_counter_sample->type),
624 EXTRACT_32BITS(sflow_expanded_counter_sample->index),
625 nrecords));
626
627 return sflow_print_counter_records(ndo, pointer + sizeof(struct sflow_expanded_counter_sample_t),
628 len - sizeof(struct sflow_expanded_counter_sample_t),
629 nrecords);
630
631 trunc:
632 return 1;
633 }
634
635 static int
636 print_sflow_raw_packet(netdissect_options *ndo,
637 const u_char *pointer, u_int len) {
638
639 const struct sflow_expanded_flow_raw_t *sflow_flow_raw;
640
641 if (len < sizeof(struct sflow_expanded_flow_raw_t))
642 return 1;
643
644 sflow_flow_raw = (const struct sflow_expanded_flow_raw_t *)pointer;
645 ND_TCHECK(*sflow_flow_raw);
646 ND_PRINT((ndo, "\n\t protocol %s (%u), length %u, stripped bytes %u, header_size %u",
647 tok2str(sflow_flow_raw_protocol_values,"Unknown",EXTRACT_32BITS(sflow_flow_raw->protocol)),
648 EXTRACT_32BITS(sflow_flow_raw->protocol),
649 EXTRACT_32BITS(sflow_flow_raw->length),
650 EXTRACT_32BITS(sflow_flow_raw->stripped_bytes),
651 EXTRACT_32BITS(sflow_flow_raw->header_size)));
652
653 /* QUESTION - should we attempt to print the raw header itself?
654 assuming of course there is wnough data present to do so... */
655
656 return 0;
657
658 trunc:
659 return 1;
660 }
661
662 static int
663 print_sflow_ethernet_frame(netdissect_options *ndo,
664 const u_char *pointer, u_int len) {
665
666 const struct sflow_ethernet_frame_t *sflow_ethernet_frame;
667
668 if (len < sizeof(struct sflow_ethernet_frame_t))
669 return 1;
670
671 sflow_ethernet_frame = (const struct sflow_ethernet_frame_t *)pointer;
672 ND_TCHECK(*sflow_ethernet_frame);
673
674 ND_PRINT((ndo, "\n\t frame len %u, type %u",
675 EXTRACT_32BITS(sflow_ethernet_frame->length),
676 EXTRACT_32BITS(sflow_ethernet_frame->type)));
677
678 return 0;
679
680 trunc:
681 return 1;
682 }
683
684 static int
685 print_sflow_extended_switch_data(netdissect_options *ndo,
686 const u_char *pointer, u_int len) {
687
688 const struct sflow_extended_switch_data_t *sflow_extended_sw_data;
689
690 if (len < sizeof(struct sflow_extended_switch_data_t))
691 return 1;
692
693 sflow_extended_sw_data = (const struct sflow_extended_switch_data_t *)pointer;
694 ND_TCHECK(*sflow_extended_sw_data);
695 ND_PRINT((ndo, "\n\t src vlan %u, src pri %u, dst vlan %u, dst pri %u",
696 EXTRACT_32BITS(sflow_extended_sw_data->src_vlan),
697 EXTRACT_32BITS(sflow_extended_sw_data->src_pri),
698 EXTRACT_32BITS(sflow_extended_sw_data->dst_vlan),
699 EXTRACT_32BITS(sflow_extended_sw_data->dst_pri)));
700
701 return 0;
702
703 trunc:
704 return 1;
705 }
706
707 static int
708 sflow_print_flow_records(netdissect_options *ndo,
709 const u_char *pointer, u_int len, u_int records) {
710
711 u_int nrecords;
712 const u_char *tptr;
713 u_int tlen;
714 u_int flow_type;
715 u_int enterprise;
716 u_int flow_len;
717 const struct sflow_flow_record_t *sflow_flow_record;
718
719 nrecords = records;
720 tptr = pointer;
721 tlen = len;
722
723 while (nrecords > 0) {
724 /* do we have the "header?" */
725 if (tlen < sizeof(struct sflow_flow_record_t))
726 return 1;
727
728 sflow_flow_record = (const struct sflow_flow_record_t *)tptr;
729 ND_TCHECK(*sflow_flow_record);
730
731 /* so, the funky encoding means we cannot blythly mask-off
732 bits, we must also check the enterprise. */
733
734 enterprise = EXTRACT_32BITS(sflow_flow_record->format);
735 flow_type = enterprise & 0x0FFF;
736 enterprise = enterprise >> 12;
737 flow_len = EXTRACT_32BITS(sflow_flow_record->length);
738 ND_PRINT((ndo, "\n\t enterprise %u %s (%u) length %u",
739 enterprise,
740 (enterprise == 0) ? tok2str(sflow_flow_type_values,"Unknown",flow_type) : "Unknown",
741 flow_type,
742 flow_len));
743
744 tptr += sizeof(struct sflow_flow_record_t);
745 tlen -= sizeof(struct sflow_flow_record_t);
746
747 if (tlen < flow_len)
748 return 1;
749
750 if (enterprise == 0) {
751 switch (flow_type) {
752 case SFLOW_FLOW_RAW_PACKET:
753 if (print_sflow_raw_packet(ndo, tptr, tlen))
754 return 1;
755 break;
756 case SFLOW_FLOW_EXTENDED_SWITCH_DATA:
757 if (print_sflow_extended_switch_data(ndo, tptr, tlen))
758 return 1;
759 break;
760 case SFLOW_FLOW_ETHERNET_FRAME:
761 if (print_sflow_ethernet_frame(ndo, tptr, tlen))
762 return 1;
763 break;
764 /* FIXME these need a decoder */
765 case SFLOW_FLOW_IPV4_DATA:
766 case SFLOW_FLOW_IPV6_DATA:
767 case SFLOW_FLOW_EXTENDED_ROUTER_DATA:
768 case SFLOW_FLOW_EXTENDED_GATEWAY_DATA:
769 case SFLOW_FLOW_EXTENDED_USER_DATA:
770 case SFLOW_FLOW_EXTENDED_URL_DATA:
771 case SFLOW_FLOW_EXTENDED_MPLS_DATA:
772 case SFLOW_FLOW_EXTENDED_NAT_DATA:
773 case SFLOW_FLOW_EXTENDED_MPLS_TUNNEL:
774 case SFLOW_FLOW_EXTENDED_MPLS_VC:
775 case SFLOW_FLOW_EXTENDED_MPLS_FEC:
776 case SFLOW_FLOW_EXTENDED_MPLS_LVP_FEC:
777 case SFLOW_FLOW_EXTENDED_VLAN_TUNNEL:
778 break;
779 default:
780 if (ndo->ndo_vflag <= 1)
781 print_unknown_data(ndo, tptr, "\n\t\t", flow_len);
782 break;
783 }
784 }
785 tptr += flow_len;
786 tlen -= flow_len;
787 nrecords--;
788
789 }
790
791 return 0;
792
793 trunc:
794 return 1;
795 }
796
797 static int
798 sflow_print_flow_sample(netdissect_options *ndo,
799 const u_char *pointer, u_int len) {
800
801 const struct sflow_flow_sample_t *sflow_flow_sample;
802 u_int nrecords;
803 u_int typesource;
804 u_int type;
805 u_int index;
806
807 if (len < sizeof(struct sflow_flow_sample_t))
808 return 1;
809
810 sflow_flow_sample = (struct sflow_flow_sample_t *)pointer;
811 ND_TCHECK(*sflow_flow_sample);
812
813 typesource = EXTRACT_32BITS(sflow_flow_sample->typesource);
814 nrecords = EXTRACT_32BITS(sflow_flow_sample->records);
815 type = typesource >> 24;
816 index = typesource & 0x0FFF;
817
818 ND_PRINT((ndo, " seqnum %u, type %u, idx %u, rate %u, pool %u, drops %u, input %u output %u records %u",
819 EXTRACT_32BITS(sflow_flow_sample->seqnum),
820 type,
821 index,
822 EXTRACT_32BITS(sflow_flow_sample->rate),
823 EXTRACT_32BITS(sflow_flow_sample->pool),
824 EXTRACT_32BITS(sflow_flow_sample->drops),
825 EXTRACT_32BITS(sflow_flow_sample->in_interface),
826 EXTRACT_32BITS(sflow_flow_sample->out_interface),
827 nrecords));
828
829 return sflow_print_flow_records(ndo, pointer + sizeof(struct sflow_flow_sample_t),
830 len - sizeof(struct sflow_flow_sample_t),
831 nrecords);
832
833 trunc:
834 return 1;
835 }
836
837 static int
838 sflow_print_expanded_flow_sample(netdissect_options *ndo,
839 const u_char *pointer, u_int len) {
840
841 const struct sflow_expanded_flow_sample_t *sflow_expanded_flow_sample;
842 u_int nrecords;
843
844 if (len < sizeof(struct sflow_expanded_flow_sample_t))
845 return 1;
846
847 sflow_expanded_flow_sample = (const struct sflow_expanded_flow_sample_t *)pointer;
848 ND_TCHECK(*sflow_expanded_flow_sample);
849
850 nrecords = EXTRACT_32BITS(sflow_expanded_flow_sample->records);
851
852 ND_PRINT((ndo, " seqnum %u, type %u, idx %u, rate %u, pool %u, drops %u, records %u",
853 EXTRACT_32BITS(sflow_expanded_flow_sample->seqnum),
854 EXTRACT_32BITS(sflow_expanded_flow_sample->type),
855 EXTRACT_32BITS(sflow_expanded_flow_sample->index),
856 EXTRACT_32BITS(sflow_expanded_flow_sample->rate),
857 EXTRACT_32BITS(sflow_expanded_flow_sample->pool),
858 EXTRACT_32BITS(sflow_expanded_flow_sample->drops),
859 EXTRACT_32BITS(sflow_expanded_flow_sample->records)));
860
861 return sflow_print_flow_records(ndo, pointer + sizeof(struct sflow_expanded_flow_sample_t),
862 len - sizeof(struct sflow_expanded_flow_sample_t),
863 nrecords);
864
865 trunc:
866 return 1;
867 }
868
869 void
870 sflow_print(netdissect_options *ndo,
871 const u_char *pptr, u_int len) {
872
873 const struct sflow_datagram_t *sflow_datagram;
874 const struct sflow_sample_header *sflow_sample;
875
876 const u_char *tptr;
877 u_int tlen;
878 uint32_t sflow_sample_type, sflow_sample_len;
879 uint32_t nsamples;
880
881 tptr = pptr;
882 tlen = len;
883 sflow_datagram = (const struct sflow_datagram_t *)pptr;
884 ND_TCHECK(*sflow_datagram);
885
886 /*
887 * Sanity checking of the header.
888 */
889 if (EXTRACT_32BITS(sflow_datagram->version) != 5) {
890 ND_PRINT((ndo, "sFlow version %u packet not supported",
891 EXTRACT_32BITS(sflow_datagram->version)));
892 return;
893 }
894
895 if (ndo->ndo_vflag < 1) {
896 ND_PRINT((ndo, "sFlowv%u, %s agent %s, agent-id %u, length %u",
897 EXTRACT_32BITS(sflow_datagram->version),
898 EXTRACT_32BITS(sflow_datagram->ip_version) == 1 ? "IPv4" : "IPv6",
899 ipaddr_string(ndo, sflow_datagram->agent),
900 EXTRACT_32BITS(sflow_datagram->agent_id),
901 len));
902 return;
903 }
904
905 /* ok they seem to want to know everything - lets fully decode it */
906 nsamples=EXTRACT_32BITS(sflow_datagram->samples);
907 ND_PRINT((ndo, "sFlowv%u, %s agent %s, agent-id %u, seqnum %u, uptime %u, samples %u, length %u",
908 EXTRACT_32BITS(sflow_datagram->version),
909 EXTRACT_32BITS(sflow_datagram->ip_version) == 1 ? "IPv4" : "IPv6",
910 ipaddr_string(ndo, sflow_datagram->agent),
911 EXTRACT_32BITS(sflow_datagram->agent_id),
912 EXTRACT_32BITS(sflow_datagram->seqnum),
913 EXTRACT_32BITS(sflow_datagram->uptime),
914 nsamples,
915 len));
916
917 /* skip Common header */
918 tptr += sizeof(const struct sflow_datagram_t);
919 tlen -= sizeof(const struct sflow_datagram_t);
920
921 while (nsamples > 0 && tlen > 0) {
922 sflow_sample = (const struct sflow_sample_header *)tptr;
923 ND_TCHECK(*sflow_sample);
924
925 sflow_sample_type = (EXTRACT_32BITS(sflow_sample->format)&0x0FFF);
926 sflow_sample_len = EXTRACT_32BITS(sflow_sample->len);
927
928 if (tlen < sizeof(struct sflow_sample_header))
929 goto trunc;
930
931 tptr += sizeof(struct sflow_sample_header);
932 tlen -= sizeof(struct sflow_sample_header);
933
934 ND_PRINT((ndo, "\n\t%s (%u), length %u,",
935 tok2str(sflow_format_values, "Unknown", sflow_sample_type),
936 sflow_sample_type,
937 sflow_sample_len));
938
939 /* basic sanity check */
940 if (sflow_sample_type == 0 || sflow_sample_len ==0) {
941 return;
942 }
943
944 if (tlen < sflow_sample_len)
945 goto trunc;
946
947 /* did we capture enough for fully decoding the sample ? */
948 ND_TCHECK2(*tptr, sflow_sample_len);
949
950 switch(sflow_sample_type) {
951 case SFLOW_FLOW_SAMPLE:
952 if (sflow_print_flow_sample(ndo, tptr, tlen))
953 goto trunc;
954 break;
955
956 case SFLOW_COUNTER_SAMPLE:
957 if (sflow_print_counter_sample(ndo, tptr,tlen))
958 goto trunc;
959 break;
960
961 case SFLOW_EXPANDED_FLOW_SAMPLE:
962 if (sflow_print_expanded_flow_sample(ndo, tptr, tlen))
963 goto trunc;
964 break;
965
966 case SFLOW_EXPANDED_COUNTER_SAMPLE:
967 if (sflow_print_expanded_counter_sample(ndo, tptr,tlen))
968 goto trunc;
969 break;
970
971 default:
972 if (ndo->ndo_vflag <= 1)
973 print_unknown_data(ndo, tptr, "\n\t ", sflow_sample_len);
974 break;
975 }
976 tptr += sflow_sample_len;
977 tlen -= sflow_sample_len;
978 nsamples--;
979 }
980 return;
981
982 trunc:
983 ND_PRINT((ndo, "[|SFLOW]"));
984 }
985
986 /*
987 * Local Variables:
988 * c-style: whitesmith
989 * c-basic-offset: 4
990 * End:
991 */
[mirror] the TCPdump network dissector