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 * Original code by Carles Kishimoto <carles.kishimoto@gmail.com>
16 *
17 * Expansion and refactoring by Rick Jones <rick.jones2@hp.com>
18 */
19
20 /* \summary: sFlow protocol printer */
21
22 /* specification: https://sflow.org/developers/specifications.php */
23
24 #include <sys/cdefs.h>
25 #ifndef lint
26 __RCSID("$NetBSD: print-sflow.c,v 1.11 2024/09/02 16:15:33 christos Exp $");
27 #endif
28
29 #include <config.h>
30
31 #include "netdissect-stdinc.h"
32
33 #define ND_LONGJMP_FROM_TCHECK
34 #include "netdissect.h"
35 #include "extract.h"
36 #include "addrtoname.h"
37
38 /*
39 * sFlow datagram
40 *
41 * 0 1 2 3
42 * 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
43 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
44 * | Sflow version (2,4,5) |
45 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
46 * | IP version (1 for IPv4 | 2 for IPv6) |
47 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
48 * | IP Address AGENT (4 or 16 bytes) |
49 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
50 * | Sub agent ID |
51 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
52 * | Datagram sequence number |
53 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
54 * | Switch uptime in ms |
55 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
56 * | num samples in datagram |
57 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
58 *
59 */
60
61 struct sflow_datagram_t {
62 nd_uint32_t version;
63 nd_uint32_t ip_version;
64 nd_ipv4 agent;
65 nd_uint32_t agent_id;
66 nd_uint32_t seqnum;
67 nd_uint32_t uptime;
68 nd_uint32_t samples;
69 };
70
71 struct sflow_v6_datagram_t {
72 nd_uint32_t version;
73 nd_uint32_t ip_version;
74 nd_ipv6 agent;
75 nd_uint32_t agent_id;
76 nd_uint32_t seqnum;
77 nd_uint32_t uptime;
78 nd_uint32_t samples;
79 };
80
81 struct sflow_sample_header {
82 nd_uint32_t format;
83 nd_uint32_t len;
84 };
85
86 #define SFLOW_FLOW_SAMPLE 1
87 #define SFLOW_COUNTER_SAMPLE 2
88 #define SFLOW_EXPANDED_FLOW_SAMPLE 3
89 #define SFLOW_EXPANDED_COUNTER_SAMPLE 4
90
91 static const struct tok sflow_format_values[] = {
92 { SFLOW_FLOW_SAMPLE, "flow sample" },
93 { SFLOW_COUNTER_SAMPLE, "counter sample" },
94 { SFLOW_EXPANDED_FLOW_SAMPLE, "expanded flow sample" },
95 { SFLOW_EXPANDED_COUNTER_SAMPLE, "expanded counter sample" },
96 { 0, NULL}
97 };
98
99 struct sflow_flow_sample_t {
100 nd_uint32_t seqnum;
101 nd_uint8_t type;
102 nd_uint24_t index;
103 nd_uint32_t rate;
104 nd_uint32_t pool;
105 nd_uint32_t drops;
106 nd_uint32_t in_interface;
107 nd_uint32_t out_interface;
108 nd_uint32_t records;
109
110 };
111
112 struct sflow_expanded_flow_sample_t {
113 nd_uint32_t seqnum;
114 nd_uint32_t type;
115 nd_uint32_t index;
116 nd_uint32_t rate;
117 nd_uint32_t pool;
118 nd_uint32_t drops;
119 nd_uint32_t in_interface_format;
120 nd_uint32_t in_interface_value;
121 nd_uint32_t out_interface_format;
122 nd_uint32_t out_interface_value;
123 nd_uint32_t records;
124 };
125
126 #define SFLOW_FLOW_RAW_PACKET 1
127 #define SFLOW_FLOW_ETHERNET_FRAME 2
128 #define SFLOW_FLOW_IPV4_DATA 3
129 #define SFLOW_FLOW_IPV6_DATA 4
130 #define SFLOW_FLOW_EXTENDED_SWITCH_DATA 1001
131 #define SFLOW_FLOW_EXTENDED_ROUTER_DATA 1002
132 #define SFLOW_FLOW_EXTENDED_GATEWAY_DATA 1003
133 #define SFLOW_FLOW_EXTENDED_USER_DATA 1004
134 #define SFLOW_FLOW_EXTENDED_URL_DATA 1005
135 #define SFLOW_FLOW_EXTENDED_MPLS_DATA 1006
136 #define SFLOW_FLOW_EXTENDED_NAT_DATA 1007
137 #define SFLOW_FLOW_EXTENDED_MPLS_TUNNEL 1008
138 #define SFLOW_FLOW_EXTENDED_MPLS_VC 1009
139 #define SFLOW_FLOW_EXTENDED_MPLS_FEC 1010
140 #define SFLOW_FLOW_EXTENDED_MPLS_LVP_FEC 1011
141 #define SFLOW_FLOW_EXTENDED_VLAN_TUNNEL 1012
142
143 static const struct tok sflow_flow_type_values[] = {
144 { SFLOW_FLOW_RAW_PACKET, "Raw packet"},
145 { SFLOW_FLOW_ETHERNET_FRAME, "Ethernet frame"},
146 { SFLOW_FLOW_IPV4_DATA, "IPv4 Data"},
147 { SFLOW_FLOW_IPV6_DATA, "IPv6 Data"},
148 { SFLOW_FLOW_EXTENDED_SWITCH_DATA, "Extended Switch data"},
149 { SFLOW_FLOW_EXTENDED_ROUTER_DATA, "Extended Router data"},
150 { SFLOW_FLOW_EXTENDED_GATEWAY_DATA, "Extended Gateway data"},
151 { SFLOW_FLOW_EXTENDED_USER_DATA, "Extended User data"},
152 { SFLOW_FLOW_EXTENDED_URL_DATA, "Extended URL data"},
153 { SFLOW_FLOW_EXTENDED_MPLS_DATA, "Extended MPLS data"},
154 { SFLOW_FLOW_EXTENDED_NAT_DATA, "Extended NAT data"},
155 { SFLOW_FLOW_EXTENDED_MPLS_TUNNEL, "Extended MPLS tunnel"},
156 { SFLOW_FLOW_EXTENDED_MPLS_VC, "Extended MPLS VC"},
157 { SFLOW_FLOW_EXTENDED_MPLS_FEC, "Extended MPLS FEC"},
158 { SFLOW_FLOW_EXTENDED_MPLS_LVP_FEC, "Extended MPLS LVP FEC"},
159 { SFLOW_FLOW_EXTENDED_VLAN_TUNNEL, "Extended VLAN Tunnel"},
160 { 0, NULL}
161 };
162
163 #define SFLOW_HEADER_PROTOCOL_ETHERNET 1
164 #define SFLOW_HEADER_PROTOCOL_IPV4 11
165 #define SFLOW_HEADER_PROTOCOL_IPV6 12
166
167 static const struct tok sflow_flow_raw_protocol_values[] = {
168 { SFLOW_HEADER_PROTOCOL_ETHERNET, "Ethernet"},
169 { SFLOW_HEADER_PROTOCOL_IPV4, "IPv4"},
170 { SFLOW_HEADER_PROTOCOL_IPV6, "IPv6"},
171 { 0, NULL}
172 };
173
174 struct sflow_expanded_flow_raw_t {
175 nd_uint32_t protocol;
176 nd_uint32_t length;
177 nd_uint32_t stripped_bytes;
178 nd_uint32_t header_size;
179 };
180
181 struct sflow_ethernet_frame_t {
182 nd_uint32_t length;
183 nd_byte src_mac[8];
184 nd_byte dst_mac[8];
185 nd_uint32_t type;
186 };
187
188 struct sflow_extended_switch_data_t {
189 nd_uint32_t src_vlan;
190 nd_uint32_t src_pri;
191 nd_uint32_t dst_vlan;
192 nd_uint32_t dst_pri;
193 };
194
195 struct sflow_counter_record_t {
196 nd_uint32_t format;
197 nd_uint32_t length;
198 };
199
200 struct sflow_flow_record_t {
201 nd_uint32_t format;
202 nd_uint32_t length;
203 };
204
205 struct sflow_counter_sample_t {
206 nd_uint32_t seqnum;
207 nd_uint8_t type;
208 nd_uint24_t index;
209 nd_uint32_t records;
210 };
211
212 struct sflow_expanded_counter_sample_t {
213 nd_uint32_t seqnum;
214 nd_uint32_t type;
215 nd_uint32_t index;
216 nd_uint32_t records;
217 };
218
219 #define SFLOW_COUNTER_GENERIC 1
220 #define SFLOW_COUNTER_ETHERNET 2
221 #define SFLOW_COUNTER_TOKEN_RING 3
222 #define SFLOW_COUNTER_BASEVG 4
223 #define SFLOW_COUNTER_VLAN 5
224 #define SFLOW_COUNTER_PROCESSOR 1001
225
226 static const struct tok sflow_counter_type_values[] = {
227 { SFLOW_COUNTER_GENERIC, "Generic counter"},
228 { SFLOW_COUNTER_ETHERNET, "Ethernet counter"},
229 { SFLOW_COUNTER_TOKEN_RING, "Token ring counter"},
230 { SFLOW_COUNTER_BASEVG, "100 BaseVG counter"},
231 { SFLOW_COUNTER_VLAN, "Vlan counter"},
232 { SFLOW_COUNTER_PROCESSOR, "Processor counter"},
233 { 0, NULL}
234 };
235
236 #define SFLOW_IFACE_DIRECTION_UNKNOWN 0
237 #define SFLOW_IFACE_DIRECTION_FULLDUPLEX 1
238 #define SFLOW_IFACE_DIRECTION_HALFDUPLEX 2
239 #define SFLOW_IFACE_DIRECTION_IN 3
240 #define SFLOW_IFACE_DIRECTION_OUT 4
241
242 static const struct tok sflow_iface_direction_values[] = {
243 { SFLOW_IFACE_DIRECTION_UNKNOWN, "unknown"},
244 { SFLOW_IFACE_DIRECTION_FULLDUPLEX, "full-duplex"},
245 { SFLOW_IFACE_DIRECTION_HALFDUPLEX, "half-duplex"},
246 { SFLOW_IFACE_DIRECTION_IN, "in"},
247 { SFLOW_IFACE_DIRECTION_OUT, "out"},
248 { 0, NULL}
249 };
250
251 struct sflow_generic_counter_t {
252 nd_uint32_t ifindex;
253 nd_uint32_t iftype;
254 nd_uint64_t ifspeed;
255 nd_uint32_t ifdirection;
256 nd_uint32_t ifstatus;
257 nd_uint64_t ifinoctets;
258 nd_uint32_t ifinunicastpkts;
259 nd_uint32_t ifinmulticastpkts;
260 nd_uint32_t ifinbroadcastpkts;
261 nd_uint32_t ifindiscards;
262 nd_uint32_t ifinerrors;
263 nd_uint32_t ifinunkownprotos;
264 nd_uint64_t ifoutoctets;
265 nd_uint32_t ifoutunicastpkts;
266 nd_uint32_t ifoutmulticastpkts;
267 nd_uint32_t ifoutbroadcastpkts;
268 nd_uint32_t ifoutdiscards;
269 nd_uint32_t ifouterrors;
270 nd_uint32_t ifpromiscmode;
271 };
272
273 struct sflow_ethernet_counter_t {
274 nd_uint32_t alignerrors;
275 nd_uint32_t fcserrors;
276 nd_uint32_t single_collision_frames;
277 nd_uint32_t multiple_collision_frames;
278 nd_uint32_t test_errors;
279 nd_uint32_t deferred_transmissions;
280 nd_uint32_t late_collisions;
281 nd_uint32_t excessive_collisions;
282 nd_uint32_t mac_transmit_errors;
283 nd_uint32_t carrier_sense_errors;
284 nd_uint32_t frame_too_longs;
285 nd_uint32_t mac_receive_errors;
286 nd_uint32_t symbol_errors;
287 };
288
289 struct sflow_100basevg_counter_t {
290 nd_uint32_t in_highpriority_frames;
291 nd_uint64_t in_highpriority_octets;
292 nd_uint32_t in_normpriority_frames;
293 nd_uint64_t in_normpriority_octets;
294 nd_uint32_t in_ipmerrors;
295 nd_uint32_t in_oversized;
296 nd_uint32_t in_data_errors;
297 nd_uint32_t in_null_addressed_frames;
298 nd_uint32_t out_highpriority_frames;
299 nd_uint64_t out_highpriority_octets;
300 nd_uint32_t transitioninto_frames;
301 nd_uint64_t hc_in_highpriority_octets;
302 nd_uint64_t hc_in_normpriority_octets;
303 nd_uint64_t hc_out_highpriority_octets;
304 };
305
306 struct sflow_vlan_counter_t {
307 nd_uint32_t vlan_id;
308 nd_uint64_t octets;
309 nd_uint32_t unicast_pkt;
310 nd_uint32_t multicast_pkt;
311 nd_uint32_t broadcast_pkt;
312 nd_uint32_t discards;
313 };
314
315 static int
print_sflow_counter_generic(netdissect_options * ndo,const u_char * pointer,u_int len)316 print_sflow_counter_generic(netdissect_options *ndo,
317 const u_char *pointer, u_int len)
318 {
319 const struct sflow_generic_counter_t *sflow_gen_counter;
320
321 if (len < sizeof(struct sflow_generic_counter_t))
322 return 1;
323
324 sflow_gen_counter = (const struct sflow_generic_counter_t *)pointer;
325 ND_PRINT("\n\t ifindex %u, iftype %u, ifspeed %" PRIu64 ", ifdirection %u (%s)",
326 GET_BE_U_4(sflow_gen_counter->ifindex),
327 GET_BE_U_4(sflow_gen_counter->iftype),
328 GET_BE_U_8(sflow_gen_counter->ifspeed),
329 GET_BE_U_4(sflow_gen_counter->ifdirection),
330 tok2str(sflow_iface_direction_values, "Unknown",
331 GET_BE_U_4(sflow_gen_counter->ifdirection)));
332 ND_PRINT("\n\t ifstatus %u, adminstatus: %s, operstatus: %s",
333 GET_BE_U_4(sflow_gen_counter->ifstatus),
334 GET_BE_U_4(sflow_gen_counter->ifstatus)&1 ? "up" : "down",
335 (GET_BE_U_4(sflow_gen_counter->ifstatus)>>1)&1 ? "up" : "down");
336 ND_PRINT("\n\t In octets %" PRIu64
337 ", unicast pkts %u, multicast pkts %u, broadcast pkts %u, discards %u",
338 GET_BE_U_8(sflow_gen_counter->ifinoctets),
339 GET_BE_U_4(sflow_gen_counter->ifinunicastpkts),
340 GET_BE_U_4(sflow_gen_counter->ifinmulticastpkts),
341 GET_BE_U_4(sflow_gen_counter->ifinbroadcastpkts),
342 GET_BE_U_4(sflow_gen_counter->ifindiscards));
343 ND_PRINT("\n\t In errors %u, unknown protos %u",
344 GET_BE_U_4(sflow_gen_counter->ifinerrors),
345 GET_BE_U_4(sflow_gen_counter->ifinunkownprotos));
346 ND_PRINT("\n\t Out octets %" PRIu64
347 ", unicast pkts %u, multicast pkts %u, broadcast pkts %u, discards %u",
348 GET_BE_U_8(sflow_gen_counter->ifoutoctets),
349 GET_BE_U_4(sflow_gen_counter->ifoutunicastpkts),
350 GET_BE_U_4(sflow_gen_counter->ifoutmulticastpkts),
351 GET_BE_U_4(sflow_gen_counter->ifoutbroadcastpkts),
352 GET_BE_U_4(sflow_gen_counter->ifoutdiscards));
353 ND_PRINT("\n\t Out errors %u, promisc mode %u",
354 GET_BE_U_4(sflow_gen_counter->ifouterrors),
355 GET_BE_U_4(sflow_gen_counter->ifpromiscmode));
356
357 return 0;
358 }
359
360 static int
print_sflow_counter_ethernet(netdissect_options * ndo,const u_char * pointer,u_int len)361 print_sflow_counter_ethernet(netdissect_options *ndo,
362 const u_char *pointer, u_int len)
363 {
364 const struct sflow_ethernet_counter_t *sflow_eth_counter;
365
366 if (len < sizeof(struct sflow_ethernet_counter_t))
367 return 1;
368
369 sflow_eth_counter = (const struct sflow_ethernet_counter_t *)pointer;
370 ND_PRINT("\n\t align errors %u, fcs errors %u, single collision %u, multiple collision %u, test error %u",
371 GET_BE_U_4(sflow_eth_counter->alignerrors),
372 GET_BE_U_4(sflow_eth_counter->fcserrors),
373 GET_BE_U_4(sflow_eth_counter->single_collision_frames),
374 GET_BE_U_4(sflow_eth_counter->multiple_collision_frames),
375 GET_BE_U_4(sflow_eth_counter->test_errors));
376 ND_PRINT("\n\t deferred %u, late collision %u, excessive collision %u, mac trans error %u",
377 GET_BE_U_4(sflow_eth_counter->deferred_transmissions),
378 GET_BE_U_4(sflow_eth_counter->late_collisions),
379 GET_BE_U_4(sflow_eth_counter->excessive_collisions),
380 GET_BE_U_4(sflow_eth_counter->mac_transmit_errors));
381 ND_PRINT("\n\t carrier error %u, frames too long %u, mac receive errors %u, symbol errors %u",
382 GET_BE_U_4(sflow_eth_counter->carrier_sense_errors),
383 GET_BE_U_4(sflow_eth_counter->frame_too_longs),
384 GET_BE_U_4(sflow_eth_counter->mac_receive_errors),
385 GET_BE_U_4(sflow_eth_counter->symbol_errors));
386
387 return 0;
388 }
389
390 static int
print_sflow_counter_token_ring(netdissect_options * ndo _U_,const u_char * pointer _U_,u_int len _U_)391 print_sflow_counter_token_ring(netdissect_options *ndo _U_,
392 const u_char *pointer _U_, u_int len _U_)
393 {
394 return 0;
395 }
396
397 static int
print_sflow_counter_basevg(netdissect_options * ndo,const u_char * pointer,u_int len)398 print_sflow_counter_basevg(netdissect_options *ndo,
399 const u_char *pointer, u_int len)
400 {
401 const struct sflow_100basevg_counter_t *sflow_100basevg_counter;
402
403 if (len < sizeof(struct sflow_100basevg_counter_t))
404 return 1;
405
406 sflow_100basevg_counter = (const struct sflow_100basevg_counter_t *)pointer;
407 ND_PRINT("\n\t in high prio frames %u, in high prio octets %" PRIu64,
408 GET_BE_U_4(sflow_100basevg_counter->in_highpriority_frames),
409 GET_BE_U_8(sflow_100basevg_counter->in_highpriority_octets));
410 ND_PRINT("\n\t in norm prio frames %u, in norm prio octets %" PRIu64,
411 GET_BE_U_4(sflow_100basevg_counter->in_normpriority_frames),
412 GET_BE_U_8(sflow_100basevg_counter->in_normpriority_octets));
413 ND_PRINT("\n\t in ipm errors %u, oversized %u, in data errors %u, null addressed frames %u",
414 GET_BE_U_4(sflow_100basevg_counter->in_ipmerrors),
415 GET_BE_U_4(sflow_100basevg_counter->in_oversized),
416 GET_BE_U_4(sflow_100basevg_counter->in_data_errors),
417 GET_BE_U_4(sflow_100basevg_counter->in_null_addressed_frames));
418 ND_PRINT("\n\t out high prio frames %u, out high prio octets %" PRIu64
419 ", trans into frames %u",
420 GET_BE_U_4(sflow_100basevg_counter->out_highpriority_frames),
421 GET_BE_U_8(sflow_100basevg_counter->out_highpriority_octets),
422 GET_BE_U_4(sflow_100basevg_counter->transitioninto_frames));
423 ND_PRINT("\n\t in hc high prio octets %" PRIu64
424 ", in hc norm prio octets %" PRIu64
425 ", out hc high prio octets %" PRIu64,
426 GET_BE_U_8(sflow_100basevg_counter->hc_in_highpriority_octets),
427 GET_BE_U_8(sflow_100basevg_counter->hc_in_normpriority_octets),
428 GET_BE_U_8(sflow_100basevg_counter->hc_out_highpriority_octets));
429
430 return 0;
431 }
432
433 static int
print_sflow_counter_vlan(netdissect_options * ndo,const u_char * pointer,u_int len)434 print_sflow_counter_vlan(netdissect_options *ndo,
435 const u_char *pointer, u_int len)
436 {
437 const struct sflow_vlan_counter_t *sflow_vlan_counter;
438
439 if (len < sizeof(struct sflow_vlan_counter_t))
440 return 1;
441
442 sflow_vlan_counter = (const struct sflow_vlan_counter_t *)pointer;
443 ND_PRINT("\n\t vlan_id %u, octets %" PRIu64
444 ", unicast_pkt %u, multicast_pkt %u, broadcast_pkt %u, discards %u",
445 GET_BE_U_4(sflow_vlan_counter->vlan_id),
446 GET_BE_U_8(sflow_vlan_counter->octets),
447 GET_BE_U_4(sflow_vlan_counter->unicast_pkt),
448 GET_BE_U_4(sflow_vlan_counter->multicast_pkt),
449 GET_BE_U_4(sflow_vlan_counter->broadcast_pkt),
450 GET_BE_U_4(sflow_vlan_counter->discards));
451
452 return 0;
453 }
454
455 struct sflow_processor_counter_t {
456 nd_uint32_t five_sec_util;
457 nd_uint32_t one_min_util;
458 nd_uint32_t five_min_util;
459 nd_uint64_t total_memory;
460 nd_uint64_t free_memory;
461 };
462
463 static int
print_sflow_counter_processor(netdissect_options * ndo,const u_char * pointer,u_int len)464 print_sflow_counter_processor(netdissect_options *ndo,
465 const u_char *pointer, u_int len)
466 {
467 const struct sflow_processor_counter_t *sflow_processor_counter;
468
469 if (len < sizeof(struct sflow_processor_counter_t))
470 return 1;
471
472 sflow_processor_counter = (const struct sflow_processor_counter_t *)pointer;
473 ND_PRINT("\n\t 5sec %u, 1min %u, 5min %u, total_mem %" PRIu64
474 ", total_mem %" PRIu64,
475 GET_BE_U_4(sflow_processor_counter->five_sec_util),
476 GET_BE_U_4(sflow_processor_counter->one_min_util),
477 GET_BE_U_4(sflow_processor_counter->five_min_util),
478 GET_BE_U_8(sflow_processor_counter->total_memory),
479 GET_BE_U_8(sflow_processor_counter->free_memory));
480
481 return 0;
482 }
483
484 static int
sflow_print_counter_records(netdissect_options * ndo,const u_char * pointer,u_int len,u_int records)485 sflow_print_counter_records(netdissect_options *ndo,
486 const u_char *pointer, u_int len, u_int records)
487 {
488 u_int nrecords;
489 const u_char *tptr;
490 u_int tlen;
491 u_int counter_type;
492 u_int counter_len;
493 u_int enterprise;
494 const struct sflow_counter_record_t *sflow_counter_record;
495
496 nrecords = records;
497 tptr = pointer;
498 tlen = len;
499
500 while (nrecords > 0) {
501 /* do we have the "header?" */
502 if (tlen < sizeof(struct sflow_counter_record_t))
503 return 1;
504 sflow_counter_record = (const struct sflow_counter_record_t *)tptr;
505
506 enterprise = GET_BE_U_4(sflow_counter_record->format);
507 counter_type = enterprise & 0x0FFF;
508 enterprise = enterprise >> 20;
509 counter_len = GET_BE_U_4(sflow_counter_record->length);
510 ND_PRINT("\n\t enterprise %u, %s (%u) length %u",
511 enterprise,
512 (enterprise == 0) ? tok2str(sflow_counter_type_values,"Unknown",counter_type) : "Unknown",
513 counter_type,
514 counter_len);
515
516 tptr += sizeof(struct sflow_counter_record_t);
517 tlen -= sizeof(struct sflow_counter_record_t);
518
519 if (tlen < counter_len)
520 return 1;
521 if (enterprise == 0) {
522 switch (counter_type) {
523 case SFLOW_COUNTER_GENERIC:
524 if (print_sflow_counter_generic(ndo, tptr, tlen))
525 return 1;
526 break;
527 case SFLOW_COUNTER_ETHERNET:
528 if (print_sflow_counter_ethernet(ndo, tptr, tlen))
529 return 1;
530 break;
531 case SFLOW_COUNTER_TOKEN_RING:
532 if (print_sflow_counter_token_ring(ndo, tptr,tlen))
533 return 1;
534 break;
535 case SFLOW_COUNTER_BASEVG:
536 if (print_sflow_counter_basevg(ndo, tptr, tlen))
537 return 1;
538 break;
539 case SFLOW_COUNTER_VLAN:
540 if (print_sflow_counter_vlan(ndo, tptr, tlen))
541 return 1;
542 break;
543 case SFLOW_COUNTER_PROCESSOR:
544 if (print_sflow_counter_processor(ndo, tptr, tlen))
545 return 1;
546 break;
547 default:
548 if (ndo->ndo_vflag <= 1)
549 print_unknown_data(ndo, tptr, "\n\t\t", counter_len);
550 break;
551 }
552 }
553 tptr += counter_len;
554 tlen -= counter_len;
555 nrecords--;
556
557 }
558
559 return 0;
560 }
561
562 static int
sflow_print_counter_sample(netdissect_options * ndo,const u_char * pointer,u_int len)563 sflow_print_counter_sample(netdissect_options *ndo,
564 const u_char *pointer, u_int len)
565 {
566 const struct sflow_counter_sample_t *sflow_counter_sample;
567 u_int nrecords;
568
569 if (len < sizeof(struct sflow_counter_sample_t))
570 return 1;
571
572 sflow_counter_sample = (const struct sflow_counter_sample_t *)pointer;
573
574 nrecords = GET_BE_U_4(sflow_counter_sample->records);
575
576 ND_PRINT(" seqnum %u, type %u, idx %u, records %u",
577 GET_BE_U_4(sflow_counter_sample->seqnum),
578 GET_U_1(sflow_counter_sample->type),
579 GET_BE_U_3(sflow_counter_sample->index),
580 nrecords);
581
582 return sflow_print_counter_records(ndo, pointer + sizeof(struct sflow_counter_sample_t),
583 len - sizeof(struct sflow_counter_sample_t),
584 nrecords);
585 }
586
587 static int
sflow_print_expanded_counter_sample(netdissect_options * ndo,const u_char * pointer,u_int len)588 sflow_print_expanded_counter_sample(netdissect_options *ndo,
589 const u_char *pointer, u_int len)
590 {
591 const struct sflow_expanded_counter_sample_t *sflow_expanded_counter_sample;
592 u_int nrecords;
593
594
595 if (len < sizeof(struct sflow_expanded_counter_sample_t))
596 return 1;
597
598 sflow_expanded_counter_sample = (const struct sflow_expanded_counter_sample_t *)pointer;
599
600 nrecords = GET_BE_U_4(sflow_expanded_counter_sample->records);
601
602 ND_PRINT(" seqnum %u, type %u, idx %u, records %u",
603 GET_BE_U_4(sflow_expanded_counter_sample->seqnum),
604 GET_BE_U_4(sflow_expanded_counter_sample->type),
605 GET_BE_U_4(sflow_expanded_counter_sample->index),
606 nrecords);
607
608 return sflow_print_counter_records(ndo, pointer + sizeof(struct sflow_expanded_counter_sample_t),
609 len - sizeof(struct sflow_expanded_counter_sample_t),
610 nrecords);
611 }
612
613 static int
print_sflow_raw_packet(netdissect_options * ndo,const u_char * pointer,u_int len)614 print_sflow_raw_packet(netdissect_options *ndo,
615 const u_char *pointer, u_int len)
616 {
617 const struct sflow_expanded_flow_raw_t *sflow_flow_raw;
618
619 if (len < sizeof(struct sflow_expanded_flow_raw_t))
620 return 1;
621
622 sflow_flow_raw = (const struct sflow_expanded_flow_raw_t *)pointer;
623 ND_PRINT("\n\t protocol %s (%u), length %u, stripped bytes %u, header_size %u",
624 tok2str(sflow_flow_raw_protocol_values,"Unknown",GET_BE_U_4(sflow_flow_raw->protocol)),
625 GET_BE_U_4(sflow_flow_raw->protocol),
626 GET_BE_U_4(sflow_flow_raw->length),
627 GET_BE_U_4(sflow_flow_raw->stripped_bytes),
628 GET_BE_U_4(sflow_flow_raw->header_size));
629
630 /* QUESTION - should we attempt to print the raw header itself?
631 assuming of course there is enough data present to do so... */
632
633 return 0;
634 }
635
636 static int
print_sflow_ethernet_frame(netdissect_options * ndo,const u_char * pointer,u_int len)637 print_sflow_ethernet_frame(netdissect_options *ndo,
638 const u_char *pointer, u_int len)
639 {
640 const struct sflow_ethernet_frame_t *sflow_ethernet_frame;
641
642 if (len < sizeof(struct sflow_ethernet_frame_t))
643 return 1;
644
645 sflow_ethernet_frame = (const struct sflow_ethernet_frame_t *)pointer;
646
647 ND_PRINT("\n\t frame len %u, type %u",
648 GET_BE_U_4(sflow_ethernet_frame->length),
649 GET_BE_U_4(sflow_ethernet_frame->type));
650
651 return 0;
652 }
653
654 static int
print_sflow_extended_switch_data(netdissect_options * ndo,const u_char * pointer,u_int len)655 print_sflow_extended_switch_data(netdissect_options *ndo,
656 const u_char *pointer, u_int len)
657 {
658 const struct sflow_extended_switch_data_t *sflow_extended_sw_data;
659
660 if (len < sizeof(struct sflow_extended_switch_data_t))
661 return 1;
662
663 sflow_extended_sw_data = (const struct sflow_extended_switch_data_t *)pointer;
664 ND_PRINT("\n\t src vlan %u, src pri %u, dst vlan %u, dst pri %u",
665 GET_BE_U_4(sflow_extended_sw_data->src_vlan),
666 GET_BE_U_4(sflow_extended_sw_data->src_pri),
667 GET_BE_U_4(sflow_extended_sw_data->dst_vlan),
668 GET_BE_U_4(sflow_extended_sw_data->dst_pri));
669
670 return 0;
671 }
672
673 static int
sflow_print_flow_records(netdissect_options * ndo,const u_char * pointer,u_int len,u_int records)674 sflow_print_flow_records(netdissect_options *ndo,
675 const u_char *pointer, u_int len, u_int records)
676 {
677 u_int nrecords;
678 const u_char *tptr;
679 u_int tlen;
680 u_int flow_type;
681 u_int enterprise;
682 u_int flow_len;
683 const struct sflow_flow_record_t *sflow_flow_record;
684
685 nrecords = records;
686 tptr = pointer;
687 tlen = len;
688
689 while (nrecords > 0) {
690 /* do we have the "header?" */
691 if (tlen < sizeof(struct sflow_flow_record_t))
692 return 1;
693
694 sflow_flow_record = (const struct sflow_flow_record_t *)tptr;
695
696 /* so, the funky encoding means we cannot blithely mask-off
697 bits, we must also check the enterprise. */
698
699 enterprise = GET_BE_U_4(sflow_flow_record->format);
700 flow_type = enterprise & 0x0FFF;
701 enterprise = enterprise >> 12;
702 flow_len = GET_BE_U_4(sflow_flow_record->length);
703 ND_PRINT("\n\t enterprise %u %s (%u) length %u",
704 enterprise,
705 (enterprise == 0) ? tok2str(sflow_flow_type_values,"Unknown",flow_type) : "Unknown",
706 flow_type,
707 flow_len);
708
709 tptr += sizeof(struct sflow_flow_record_t);
710 tlen -= sizeof(struct sflow_flow_record_t);
711
712 if (tlen < flow_len)
713 return 1;
714
715 if (enterprise == 0) {
716 switch (flow_type) {
717 case SFLOW_FLOW_RAW_PACKET:
718 if (print_sflow_raw_packet(ndo, tptr, tlen))
719 return 1;
720 break;
721 case SFLOW_FLOW_EXTENDED_SWITCH_DATA:
722 if (print_sflow_extended_switch_data(ndo, tptr, tlen))
723 return 1;
724 break;
725 case SFLOW_FLOW_ETHERNET_FRAME:
726 if (print_sflow_ethernet_frame(ndo, tptr, tlen))
727 return 1;
728 break;
729 /* FIXME these need a decoder */
730 case SFLOW_FLOW_IPV4_DATA:
731 case SFLOW_FLOW_IPV6_DATA:
732 case SFLOW_FLOW_EXTENDED_ROUTER_DATA:
733 case SFLOW_FLOW_EXTENDED_GATEWAY_DATA:
734 case SFLOW_FLOW_EXTENDED_USER_DATA:
735 case SFLOW_FLOW_EXTENDED_URL_DATA:
736 case SFLOW_FLOW_EXTENDED_MPLS_DATA:
737 case SFLOW_FLOW_EXTENDED_NAT_DATA:
738 case SFLOW_FLOW_EXTENDED_MPLS_TUNNEL:
739 case SFLOW_FLOW_EXTENDED_MPLS_VC:
740 case SFLOW_FLOW_EXTENDED_MPLS_FEC:
741 case SFLOW_FLOW_EXTENDED_MPLS_LVP_FEC:
742 case SFLOW_FLOW_EXTENDED_VLAN_TUNNEL:
743 break;
744 default:
745 if (ndo->ndo_vflag <= 1)
746 print_unknown_data(ndo, tptr, "\n\t\t", flow_len);
747 break;
748 }
749 }
750 tptr += flow_len;
751 tlen -= flow_len;
752 nrecords--;
753
754 }
755
756 return 0;
757 }
758
759 static int
sflow_print_flow_sample(netdissect_options * ndo,const u_char * pointer,u_int len)760 sflow_print_flow_sample(netdissect_options *ndo,
761 const u_char *pointer, u_int len)
762 {
763 const struct sflow_flow_sample_t *sflow_flow_sample;
764 u_int nrecords;
765
766 if (len < sizeof(struct sflow_flow_sample_t))
767 return 1;
768
769 sflow_flow_sample = (const struct sflow_flow_sample_t *)pointer;
770
771 nrecords = GET_BE_U_4(sflow_flow_sample->records);
772
773 ND_PRINT(" seqnum %u, type %u, idx %u, rate %u, pool %u, drops %u, input %u output %u records %u",
774 GET_BE_U_4(sflow_flow_sample->seqnum),
775 GET_U_1(sflow_flow_sample->type),
776 GET_BE_U_3(sflow_flow_sample->index),
777 GET_BE_U_4(sflow_flow_sample->rate),
778 GET_BE_U_4(sflow_flow_sample->pool),
779 GET_BE_U_4(sflow_flow_sample->drops),
780 GET_BE_U_4(sflow_flow_sample->in_interface),
781 GET_BE_U_4(sflow_flow_sample->out_interface),
782 nrecords);
783
784 return sflow_print_flow_records(ndo, pointer + sizeof(struct sflow_flow_sample_t),
785 len - sizeof(struct sflow_flow_sample_t),
786 nrecords);
787 }
788
789 static int
sflow_print_expanded_flow_sample(netdissect_options * ndo,const u_char * pointer,u_int len)790 sflow_print_expanded_flow_sample(netdissect_options *ndo,
791 const u_char *pointer, u_int len)
792 {
793 const struct sflow_expanded_flow_sample_t *sflow_expanded_flow_sample;
794 u_int nrecords;
795
796 if (len < sizeof(struct sflow_expanded_flow_sample_t))
797 return 1;
798
799 sflow_expanded_flow_sample = (const struct sflow_expanded_flow_sample_t *)pointer;
800
801 nrecords = GET_BE_U_4(sflow_expanded_flow_sample->records);
802
803 ND_PRINT(" seqnum %u, type %u, idx %u, rate %u, pool %u, drops %u, records %u",
804 GET_BE_U_4(sflow_expanded_flow_sample->seqnum),
805 GET_BE_U_4(sflow_expanded_flow_sample->type),
806 GET_BE_U_4(sflow_expanded_flow_sample->index),
807 GET_BE_U_4(sflow_expanded_flow_sample->rate),
808 GET_BE_U_4(sflow_expanded_flow_sample->pool),
809 GET_BE_U_4(sflow_expanded_flow_sample->drops),
810 nrecords);
811
812 return sflow_print_flow_records(ndo, pointer + sizeof(struct sflow_expanded_flow_sample_t),
813 len - sizeof(struct sflow_expanded_flow_sample_t),
814 nrecords);
815 }
816
817 void
sflow_print(netdissect_options * ndo,const u_char * pptr,u_int len)818 sflow_print(netdissect_options *ndo,
819 const u_char *pptr, u_int len)
820 {
821 const struct sflow_datagram_t *sflow_datagram;
822 const struct sflow_v6_datagram_t *sflow_v6_datagram;
823 const struct sflow_sample_header *sflow_sample;
824
825 const u_char *tptr;
826 u_int tlen;
827 uint32_t sflow_sample_type, sflow_sample_len;
828 uint32_t nsamples;
829 uint32_t ip_version;
830
831 ndo->ndo_protocol = "sflow";
832 tptr = pptr;
833 tlen = len;
834 sflow_datagram = (const struct sflow_datagram_t *)pptr;
835 sflow_v6_datagram = (const struct sflow_v6_datagram_t *)pptr;
836 ip_version = GET_BE_U_4(sflow_datagram->ip_version);
837
838 if ((len < sizeof(struct sflow_datagram_t) && (ip_version == 1)) ||
839 (len < sizeof(struct sflow_v6_datagram_t) && (ip_version == 2))) {
840 ND_PRINT("sFlowv%u", GET_BE_U_4(sflow_datagram->version));
841 ND_PRINT(" [length %u < %zu]", len, sizeof(struct sflow_datagram_t));
842 nd_print_invalid(ndo);
843 return;
844 }
845 ND_TCHECK_SIZE(sflow_datagram);
846
847 /*
848 * Sanity checking of the header.
849 */
850 if (GET_BE_U_4(sflow_datagram->version) != 5) {
851 ND_PRINT("sFlow version %u packet not supported",
852 GET_BE_U_4(sflow_datagram->version));
853 return;
854 }
855
856 if (ndo->ndo_vflag < 1) {
857 ND_PRINT("sFlowv%u, %s agent %s, agent-id %u, length %u",
858 GET_BE_U_4(sflow_datagram->version),
859 ip_version == 1 ? "IPv4" : "IPv6",
860 ip_version == 1 ? GET_IPADDR_STRING(sflow_datagram->agent) :
861 GET_IP6ADDR_STRING( sflow_v6_datagram->agent),
862 ip_version == 1 ? GET_BE_U_4(sflow_datagram->agent_id) :
863 GET_BE_U_4(sflow_v6_datagram->agent_id),
864 len);
865 return;
866 }
867
868 /* ok they seem to want to know everything - lets fully decode it */
869 if (ip_version == 1) {
870 nsamples=GET_BE_U_4(sflow_datagram->samples);
871 ND_PRINT("sFlowv%u, %s agent %s, agent-id %u, seqnum %u, uptime %u, samples %u, length %u",
872 GET_BE_U_4(sflow_datagram->version),
873 "IPv4",
874 GET_IPADDR_STRING(sflow_datagram->agent),
875 GET_BE_U_4(sflow_datagram->agent_id),
876 GET_BE_U_4(sflow_datagram->seqnum),
877 GET_BE_U_4(sflow_datagram->uptime),
878 nsamples,
879 len);
880
881 /* skip Common header */
882 ND_ICHECK_ZU(tlen, <, sizeof(struct sflow_datagram_t));
883 tptr += sizeof(struct sflow_datagram_t);
884 tlen -= sizeof(struct sflow_datagram_t);
885 } else {
886 nsamples=GET_BE_U_4(sflow_v6_datagram->samples);
887 ND_PRINT("sFlowv%u, %s agent %s, agent-id %u, seqnum %u, uptime %u, samples %u, length %u",
888 GET_BE_U_4(sflow_v6_datagram->version),
889 "IPv6",
890 GET_IP6ADDR_STRING(sflow_v6_datagram->agent),
891 GET_BE_U_4(sflow_v6_datagram->agent_id),
892 GET_BE_U_4(sflow_v6_datagram->seqnum),
893 GET_BE_U_4(sflow_v6_datagram->uptime),
894 nsamples,
895 len);
896
897 /* skip Common header */
898 ND_ICHECK_ZU(tlen, <, sizeof(struct sflow_v6_datagram_t));
899 tptr += sizeof(struct sflow_v6_datagram_t);
900 tlen -= sizeof(struct sflow_v6_datagram_t);
901 }
902 while (nsamples > 0 && tlen > 0) {
903 sflow_sample = (const struct sflow_sample_header *)tptr;
904
905 sflow_sample_type = (GET_BE_U_4(sflow_sample->format)&0x0FFF);
906 sflow_sample_len = GET_BE_U_4(sflow_sample->len);
907
908 if (tlen < sizeof(struct sflow_sample_header))
909 goto invalid;
910
911 tptr += sizeof(struct sflow_sample_header);
912 tlen -= sizeof(struct sflow_sample_header);
913
914 ND_PRINT("\n\t%s (%u), length %u,",
915 tok2str(sflow_format_values, "Unknown", sflow_sample_type),
916 sflow_sample_type,
917 sflow_sample_len);
918
919 /* basic sanity check */
920 if (sflow_sample_type == 0 || sflow_sample_len ==0) {
921 return;
922 }
923
924 if (tlen < sflow_sample_len)
925 goto invalid;
926
927 /* did we capture enough for fully decoding the sample ? */
928 ND_TCHECK_LEN(tptr, sflow_sample_len);
929
930 switch(sflow_sample_type) {
931 case SFLOW_FLOW_SAMPLE:
932 if (sflow_print_flow_sample(ndo, tptr, tlen))
933 goto invalid;
934 break;
935
936 case SFLOW_COUNTER_SAMPLE:
937 if (sflow_print_counter_sample(ndo, tptr,tlen))
938 goto invalid;
939 break;
940
941 case SFLOW_EXPANDED_FLOW_SAMPLE:
942 if (sflow_print_expanded_flow_sample(ndo, tptr, tlen))
943 goto invalid;
944 break;
945
946 case SFLOW_EXPANDED_COUNTER_SAMPLE:
947 if (sflow_print_expanded_counter_sample(ndo, tptr,tlen))
948 goto invalid;
949 break;
950
951 default:
952 if (ndo->ndo_vflag <= 1)
953 print_unknown_data(ndo, tptr, "\n\t ", sflow_sample_len);
954 break;
955 }
956 tptr += sflow_sample_len;
957 tlen -= sflow_sample_len;
958 nsamples--;
959 }
960 return;
961
962 invalid:
963 nd_print_invalid(ndo);
964 ND_TCHECK_LEN(tptr, tlen);
965 }
966