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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: http://www.sflow.org/developers/specifications.php */
23 
24 #ifdef HAVE_CONFIG_H
25 #include "config.h"
26 #endif
27 
28 #include <netdissect-stdinc.h>
29 
30 #include "netdissect.h"
31 #include "extract.h"
32 #include "addrtoname.h"
33 
34 /*
35  * sFlow datagram
36  *
37  * 0                   1                   2                   3
38  * 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
39  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
40  * |                     Sflow version (2,4,5)                     |
41  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
42  * |               IP version (1 for IPv4 | 2 for IPv6)            |
43  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
44  * |                     IP Address AGENT (4 or 16 bytes)          |
45  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
46  * |                          Sub agent ID                         |
47  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
48  * |                      Datagram sequence number                 |
49  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
50  * |                      Switch uptime in ms                      |
51  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
52  * |                    num samples in datagram                    |
53  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
54  *
55  */
56 
57 struct sflow_datagram_t {
58     uint8_t 	version[4];
59     uint8_t 	ip_version[4];
60     uint8_t 	agent[4];
61     uint8_t 	agent_id[4];
62     uint8_t 	seqnum[4];
63     uint8_t 	uptime[4];
64     uint8_t 	samples[4];
65 };
66 
67 struct sflow_sample_header {
68     uint8_t	format[4];
69     uint8_t	len[4];
70 };
71 
72 #define		SFLOW_FLOW_SAMPLE		1
73 #define		SFLOW_COUNTER_SAMPLE		2
74 #define		SFLOW_EXPANDED_FLOW_SAMPLE	3
75 #define		SFLOW_EXPANDED_COUNTER_SAMPLE	4
76 
77 static const struct tok sflow_format_values[] = {
78     { SFLOW_FLOW_SAMPLE, "flow sample" },
79     { SFLOW_COUNTER_SAMPLE, "counter sample" },
80     { SFLOW_EXPANDED_FLOW_SAMPLE, "expanded flow sample" },
81     { SFLOW_EXPANDED_COUNTER_SAMPLE, "expanded counter sample" },
82     { 0, NULL}
83 };
84 
85 struct sflow_flow_sample_t {
86     uint8_t    seqnum[4];
87     uint8_t    typesource[4];
88     uint8_t    rate[4];
89     uint8_t    pool[4];
90     uint8_t    drops[4];
91     uint8_t    in_interface[4];
92     uint8_t    out_interface[4];
93     uint8_t    records[4];
94 
95 };
96 
97 struct sflow_expanded_flow_sample_t {
98     uint8_t    seqnum[4];
99     uint8_t    type[4];
100     uint8_t    index[4];
101     uint8_t    rate[4];
102     uint8_t    pool[4];
103     uint8_t    drops[4];
104     uint8_t    in_interface_format[4];
105     uint8_t    in_interface_value[4];
106     uint8_t    out_interface_format[4];
107     uint8_t    out_interface_value[4];
108     uint8_t    records[4];
109 };
110 
111 #define 	SFLOW_FLOW_RAW_PACKET			1
112 #define 	SFLOW_FLOW_ETHERNET_FRAME		2
113 #define 	SFLOW_FLOW_IPV4_DATA			3
114 #define 	SFLOW_FLOW_IPV6_DATA			4
115 #define 	SFLOW_FLOW_EXTENDED_SWITCH_DATA		1001
116 #define 	SFLOW_FLOW_EXTENDED_ROUTER_DATA		1002
117 #define 	SFLOW_FLOW_EXTENDED_GATEWAY_DATA 	1003
118 #define 	SFLOW_FLOW_EXTENDED_USER_DATA		1004
119 #define 	SFLOW_FLOW_EXTENDED_URL_DATA		1005
120 #define 	SFLOW_FLOW_EXTENDED_MPLS_DATA		1006
121 #define 	SFLOW_FLOW_EXTENDED_NAT_DATA		1007
122 #define 	SFLOW_FLOW_EXTENDED_MPLS_TUNNEL		1008
123 #define 	SFLOW_FLOW_EXTENDED_MPLS_VC		1009
124 #define 	SFLOW_FLOW_EXTENDED_MPLS_FEC		1010
125 #define 	SFLOW_FLOW_EXTENDED_MPLS_LVP_FEC	1011
126 #define 	SFLOW_FLOW_EXTENDED_VLAN_TUNNEL		1012
127 
128 static const struct tok sflow_flow_type_values[] = {
129     { SFLOW_FLOW_RAW_PACKET, "Raw packet"},
130     { SFLOW_FLOW_ETHERNET_FRAME, "Ethernet frame"},
131     { SFLOW_FLOW_IPV4_DATA, "IPv4 Data"},
132     { SFLOW_FLOW_IPV6_DATA, "IPv6 Data"},
133     { SFLOW_FLOW_EXTENDED_SWITCH_DATA, "Extended Switch data"},
134     { SFLOW_FLOW_EXTENDED_ROUTER_DATA, "Extended Router data"},
135     { SFLOW_FLOW_EXTENDED_GATEWAY_DATA, "Extended Gateway data"},
136     { SFLOW_FLOW_EXTENDED_USER_DATA, "Extended User data"},
137     { SFLOW_FLOW_EXTENDED_URL_DATA, "Extended URL data"},
138     { SFLOW_FLOW_EXTENDED_MPLS_DATA, "Extended MPLS data"},
139     { SFLOW_FLOW_EXTENDED_NAT_DATA, "Extended NAT data"},
140     { SFLOW_FLOW_EXTENDED_MPLS_TUNNEL, "Extended MPLS tunnel"},
141     { SFLOW_FLOW_EXTENDED_MPLS_VC, "Extended MPLS VC"},
142     { SFLOW_FLOW_EXTENDED_MPLS_FEC, "Extended MPLS FEC"},
143     { SFLOW_FLOW_EXTENDED_MPLS_LVP_FEC, "Extended MPLS LVP FEC"},
144     { SFLOW_FLOW_EXTENDED_VLAN_TUNNEL, "Extended VLAN Tunnel"},
145     { 0, NULL}
146 };
147 
148 #define		SFLOW_HEADER_PROTOCOL_ETHERNET	1
149 #define		SFLOW_HEADER_PROTOCOL_IPV4	11
150 #define		SFLOW_HEADER_PROTOCOL_IPV6	12
151 
152 static const struct tok sflow_flow_raw_protocol_values[] = {
153     { SFLOW_HEADER_PROTOCOL_ETHERNET, "Ethernet"},
154     { SFLOW_HEADER_PROTOCOL_IPV4, "IPv4"},
155     { SFLOW_HEADER_PROTOCOL_IPV6, "IPv6"},
156     { 0, NULL}
157 };
158 
159 struct sflow_expanded_flow_raw_t {
160     uint8_t    protocol[4];
161     uint8_t    length[4];
162     uint8_t    stripped_bytes[4];
163     uint8_t    header_size[4];
164 };
165 
166 struct sflow_ethernet_frame_t {
167     uint8_t length[4];
168     uint8_t src_mac[8];
169     uint8_t dst_mac[8];
170     uint8_t type[4];
171 };
172 
173 struct sflow_extended_switch_data_t {
174     uint8_t src_vlan[4];
175     uint8_t src_pri[4];
176     uint8_t dst_vlan[4];
177     uint8_t dst_pri[4];
178 };
179 
180 struct sflow_counter_record_t {
181     uint8_t    format[4];
182     uint8_t    length[4];
183 };
184 
185 struct sflow_flow_record_t {
186     uint8_t    format[4];
187     uint8_t    length[4];
188 };
189 
190 struct sflow_counter_sample_t {
191     uint8_t    seqnum[4];
192     uint8_t    typesource[4];
193     uint8_t    records[4];
194 };
195 
196 struct sflow_expanded_counter_sample_t {
197     uint8_t    seqnum[4];
198     uint8_t    type[4];
199     uint8_t    index[4];
200     uint8_t    records[4];
201 };
202 
203 #define         SFLOW_COUNTER_GENERIC           1
204 #define         SFLOW_COUNTER_ETHERNET          2
205 #define         SFLOW_COUNTER_TOKEN_RING        3
206 #define         SFLOW_COUNTER_BASEVG            4
207 #define         SFLOW_COUNTER_VLAN              5
208 #define         SFLOW_COUNTER_PROCESSOR         1001
209 
210 static const struct tok sflow_counter_type_values[] = {
211     { SFLOW_COUNTER_GENERIC, "Generic counter"},
212     { SFLOW_COUNTER_ETHERNET, "Ethernet counter"},
213     { SFLOW_COUNTER_TOKEN_RING, "Token ring counter"},
214     { SFLOW_COUNTER_BASEVG, "100 BaseVG counter"},
215     { SFLOW_COUNTER_VLAN, "Vlan counter"},
216     { SFLOW_COUNTER_PROCESSOR, "Processor counter"},
217     { 0, NULL}
218 };
219 
220 #define		SFLOW_IFACE_DIRECTION_UNKNOWN		0
221 #define		SFLOW_IFACE_DIRECTION_FULLDUPLEX	1
222 #define		SFLOW_IFACE_DIRECTION_HALFDUPLEX	2
223 #define		SFLOW_IFACE_DIRECTION_IN		3
224 #define		SFLOW_IFACE_DIRECTION_OUT		4
225 
226 static const struct tok sflow_iface_direction_values[] = {
227     { SFLOW_IFACE_DIRECTION_UNKNOWN, "unknown"},
228     { SFLOW_IFACE_DIRECTION_FULLDUPLEX, "full-duplex"},
229     { SFLOW_IFACE_DIRECTION_HALFDUPLEX, "half-duplex"},
230     { SFLOW_IFACE_DIRECTION_IN, "in"},
231     { SFLOW_IFACE_DIRECTION_OUT, "out"},
232     { 0, NULL}
233 };
234 
235 struct sflow_generic_counter_t {
236     uint8_t    ifindex[4];
237     uint8_t    iftype[4];
238     uint8_t    ifspeed[8];
239     uint8_t    ifdirection[4];
240     uint8_t    ifstatus[4];
241     uint8_t    ifinoctets[8];
242     uint8_t    ifinunicastpkts[4];
243     uint8_t    ifinmulticastpkts[4];
244     uint8_t    ifinbroadcastpkts[4];
245     uint8_t    ifindiscards[4];
246     uint8_t    ifinerrors[4];
247     uint8_t    ifinunkownprotos[4];
248     uint8_t    ifoutoctets[8];
249     uint8_t    ifoutunicastpkts[4];
250     uint8_t    ifoutmulticastpkts[4];
251     uint8_t    ifoutbroadcastpkts[4];
252     uint8_t    ifoutdiscards[4];
253     uint8_t    ifouterrors[4];
254     uint8_t    ifpromiscmode[4];
255 };
256 
257 struct sflow_ethernet_counter_t {
258     uint8_t    alignerrors[4];
259     uint8_t    fcserrors[4];
260     uint8_t    single_collision_frames[4];
261     uint8_t    multiple_collision_frames[4];
262     uint8_t    test_errors[4];
263     uint8_t    deferred_transmissions[4];
264     uint8_t    late_collisions[4];
265     uint8_t    excessive_collisions[4];
266     uint8_t    mac_transmit_errors[4];
267     uint8_t    carrier_sense_errors[4];
268     uint8_t    frame_too_longs[4];
269     uint8_t    mac_receive_errors[4];
270     uint8_t    symbol_errors[4];
271 };
272 
273 struct sflow_100basevg_counter_t {
274     uint8_t    in_highpriority_frames[4];
275     uint8_t    in_highpriority_octets[8];
276     uint8_t    in_normpriority_frames[4];
277     uint8_t    in_normpriority_octets[8];
278     uint8_t    in_ipmerrors[4];
279     uint8_t    in_oversized[4];
280     uint8_t    in_data_errors[4];
281     uint8_t    in_null_addressed_frames[4];
282     uint8_t    out_highpriority_frames[4];
283     uint8_t    out_highpriority_octets[8];
284     uint8_t    transitioninto_frames[4];
285     uint8_t    hc_in_highpriority_octets[8];
286     uint8_t    hc_in_normpriority_octets[8];
287     uint8_t    hc_out_highpriority_octets[8];
288 };
289 
290 struct sflow_vlan_counter_t {
291     uint8_t    vlan_id[4];
292     uint8_t    octets[8];
293     uint8_t    unicast_pkt[4];
294     uint8_t    multicast_pkt[4];
295     uint8_t    broadcast_pkt[4];
296     uint8_t    discards[4];
297 };
298 
299 static int
print_sflow_counter_generic(netdissect_options * ndo,const u_char * pointer,u_int len)300 print_sflow_counter_generic(netdissect_options *ndo,
301                             const u_char *pointer, u_int len)
302 {
303     const struct sflow_generic_counter_t *sflow_gen_counter;
304 
305     if (len < sizeof(struct sflow_generic_counter_t))
306 	return 1;
307 
308     sflow_gen_counter = (const struct sflow_generic_counter_t *)pointer;
309     ND_TCHECK(*sflow_gen_counter);
310     ND_PRINT((ndo, "\n\t      ifindex %u, iftype %u, ifspeed %" PRIu64 ", ifdirection %u (%s)",
311 	   EXTRACT_32BITS(sflow_gen_counter->ifindex),
312 	   EXTRACT_32BITS(sflow_gen_counter->iftype),
313 	   EXTRACT_64BITS(sflow_gen_counter->ifspeed),
314 	   EXTRACT_32BITS(sflow_gen_counter->ifdirection),
315 	   tok2str(sflow_iface_direction_values, "Unknown",
316 	   EXTRACT_32BITS(sflow_gen_counter->ifdirection))));
317     ND_PRINT((ndo, "\n\t      ifstatus %u, adminstatus: %s, operstatus: %s",
318 	   EXTRACT_32BITS(sflow_gen_counter->ifstatus),
319 	   EXTRACT_32BITS(sflow_gen_counter->ifstatus)&1 ? "up" : "down",
320 	   (EXTRACT_32BITS(sflow_gen_counter->ifstatus)>>1)&1 ? "up" : "down"));
321     ND_PRINT((ndo, "\n\t      In octets %" PRIu64
322 	   ", unicast pkts %u, multicast pkts %u, broadcast pkts %u, discards %u",
323 	   EXTRACT_64BITS(sflow_gen_counter->ifinoctets),
324 	   EXTRACT_32BITS(sflow_gen_counter->ifinunicastpkts),
325 	   EXTRACT_32BITS(sflow_gen_counter->ifinmulticastpkts),
326 	   EXTRACT_32BITS(sflow_gen_counter->ifinbroadcastpkts),
327 	   EXTRACT_32BITS(sflow_gen_counter->ifindiscards)));
328     ND_PRINT((ndo, "\n\t      In errors %u, unknown protos %u",
329 	   EXTRACT_32BITS(sflow_gen_counter->ifinerrors),
330 	   EXTRACT_32BITS(sflow_gen_counter->ifinunkownprotos)));
331     ND_PRINT((ndo, "\n\t      Out octets %" PRIu64
332 	   ", unicast pkts %u, multicast pkts %u, broadcast pkts %u, discards %u",
333 	   EXTRACT_64BITS(sflow_gen_counter->ifoutoctets),
334 	   EXTRACT_32BITS(sflow_gen_counter->ifoutunicastpkts),
335 	   EXTRACT_32BITS(sflow_gen_counter->ifoutmulticastpkts),
336 	   EXTRACT_32BITS(sflow_gen_counter->ifoutbroadcastpkts),
337 	   EXTRACT_32BITS(sflow_gen_counter->ifoutdiscards)));
338     ND_PRINT((ndo, "\n\t      Out errors %u, promisc mode %u",
339 	   EXTRACT_32BITS(sflow_gen_counter->ifouterrors),
340 	   EXTRACT_32BITS(sflow_gen_counter->ifpromiscmode)));
341 
342     return 0;
343 
344 trunc:
345     return 1;
346 }
347 
348 static int
print_sflow_counter_ethernet(netdissect_options * ndo,const u_char * pointer,u_int len)349 print_sflow_counter_ethernet(netdissect_options *ndo,
350                              const u_char *pointer, u_int len)
351 {
352     const struct sflow_ethernet_counter_t *sflow_eth_counter;
353 
354     if (len < sizeof(struct sflow_ethernet_counter_t))
355 	return 1;
356 
357     sflow_eth_counter = (const struct sflow_ethernet_counter_t *)pointer;
358     ND_TCHECK(*sflow_eth_counter);
359     ND_PRINT((ndo, "\n\t      align errors %u, fcs errors %u, single collision %u, multiple collision %u, test error %u",
360 	   EXTRACT_32BITS(sflow_eth_counter->alignerrors),
361 	   EXTRACT_32BITS(sflow_eth_counter->fcserrors),
362 	   EXTRACT_32BITS(sflow_eth_counter->single_collision_frames),
363 	   EXTRACT_32BITS(sflow_eth_counter->multiple_collision_frames),
364 	   EXTRACT_32BITS(sflow_eth_counter->test_errors)));
365     ND_PRINT((ndo, "\n\t      deferred %u, late collision %u, excessive collision %u, mac trans error %u",
366 	   EXTRACT_32BITS(sflow_eth_counter->deferred_transmissions),
367 	   EXTRACT_32BITS(sflow_eth_counter->late_collisions),
368 	   EXTRACT_32BITS(sflow_eth_counter->excessive_collisions),
369 	   EXTRACT_32BITS(sflow_eth_counter->mac_transmit_errors)));
370     ND_PRINT((ndo, "\n\t      carrier error %u, frames too long %u, mac receive errors %u, symbol errors %u",
371 	   EXTRACT_32BITS(sflow_eth_counter->carrier_sense_errors),
372 	   EXTRACT_32BITS(sflow_eth_counter->frame_too_longs),
373 	   EXTRACT_32BITS(sflow_eth_counter->mac_receive_errors),
374 	   EXTRACT_32BITS(sflow_eth_counter->symbol_errors)));
375 
376     return 0;
377 
378 trunc:
379     return 1;
380 }
381 
382 static int
print_sflow_counter_token_ring(netdissect_options * ndo _U_,const u_char * pointer _U_,u_int len _U_)383 print_sflow_counter_token_ring(netdissect_options *ndo _U_,
384                                const u_char *pointer _U_, u_int len _U_)
385 {
386     return 0;
387 }
388 
389 static int
print_sflow_counter_basevg(netdissect_options * ndo,const u_char * pointer,u_int len)390 print_sflow_counter_basevg(netdissect_options *ndo,
391                            const u_char *pointer, u_int len)
392 {
393     const struct sflow_100basevg_counter_t *sflow_100basevg_counter;
394 
395     if (len < sizeof(struct sflow_100basevg_counter_t))
396 	return 1;
397 
398     sflow_100basevg_counter = (const struct sflow_100basevg_counter_t *)pointer;
399     ND_TCHECK(*sflow_100basevg_counter);
400     ND_PRINT((ndo, "\n\t      in high prio frames %u, in high prio octets %" PRIu64,
401 	   EXTRACT_32BITS(sflow_100basevg_counter->in_highpriority_frames),
402 	   EXTRACT_64BITS(sflow_100basevg_counter->in_highpriority_octets)));
403     ND_PRINT((ndo, "\n\t      in norm prio frames %u, in norm prio octets %" PRIu64,
404 	   EXTRACT_32BITS(sflow_100basevg_counter->in_normpriority_frames),
405 	   EXTRACT_64BITS(sflow_100basevg_counter->in_normpriority_octets)));
406     ND_PRINT((ndo, "\n\t      in ipm errors %u, oversized %u, in data errors %u, null addressed frames %u",
407 	   EXTRACT_32BITS(sflow_100basevg_counter->in_ipmerrors),
408 	   EXTRACT_32BITS(sflow_100basevg_counter->in_oversized),
409 	   EXTRACT_32BITS(sflow_100basevg_counter->in_data_errors),
410 	   EXTRACT_32BITS(sflow_100basevg_counter->in_null_addressed_frames)));
411     ND_PRINT((ndo, "\n\t      out high prio frames %u, out high prio octets %" PRIu64
412 	   ", trans into frames %u",
413 	   EXTRACT_32BITS(sflow_100basevg_counter->out_highpriority_frames),
414 	   EXTRACT_64BITS(sflow_100basevg_counter->out_highpriority_octets),
415 	   EXTRACT_32BITS(sflow_100basevg_counter->transitioninto_frames)));
416     ND_PRINT((ndo, "\n\t      in hc high prio octets %" PRIu64
417 	   ", in hc norm prio octets %" PRIu64
418 	   ", out hc high prio octets %" PRIu64,
419 	   EXTRACT_64BITS(sflow_100basevg_counter->hc_in_highpriority_octets),
420 	   EXTRACT_64BITS(sflow_100basevg_counter->hc_in_normpriority_octets),
421 	   EXTRACT_64BITS(sflow_100basevg_counter->hc_out_highpriority_octets)));
422 
423     return 0;
424 
425 trunc:
426     return 1;
427 }
428 
429 static int
print_sflow_counter_vlan(netdissect_options * ndo,const u_char * pointer,u_int len)430 print_sflow_counter_vlan(netdissect_options *ndo,
431                          const u_char *pointer, u_int len)
432 {
433     const struct sflow_vlan_counter_t *sflow_vlan_counter;
434 
435     if (len < sizeof(struct sflow_vlan_counter_t))
436 	return 1;
437 
438     sflow_vlan_counter = (const struct sflow_vlan_counter_t *)pointer;
439     ND_TCHECK(*sflow_vlan_counter);
440     ND_PRINT((ndo, "\n\t      vlan_id %u, octets %" PRIu64
441 	   ", unicast_pkt %u, multicast_pkt %u, broadcast_pkt %u, discards %u",
442 	   EXTRACT_32BITS(sflow_vlan_counter->vlan_id),
443 	   EXTRACT_64BITS(sflow_vlan_counter->octets),
444 	   EXTRACT_32BITS(sflow_vlan_counter->unicast_pkt),
445 	   EXTRACT_32BITS(sflow_vlan_counter->multicast_pkt),
446 	   EXTRACT_32BITS(sflow_vlan_counter->broadcast_pkt),
447 	   EXTRACT_32BITS(sflow_vlan_counter->discards)));
448 
449     return 0;
450 
451 trunc:
452     return 1;
453 }
454 
455 struct sflow_processor_counter_t {
456     uint8_t five_sec_util[4];
457     uint8_t one_min_util[4];
458     uint8_t five_min_util[4];
459     uint8_t total_memory[8];
460     uint8_t free_memory[8];
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_TCHECK(*sflow_processor_counter);
474     ND_PRINT((ndo, "\n\t      5sec %u, 1min %u, 5min %u, total_mem %" PRIu64
475 	   ", total_mem %" PRIu64,
476 	   EXTRACT_32BITS(sflow_processor_counter->five_sec_util),
477 	   EXTRACT_32BITS(sflow_processor_counter->one_min_util),
478 	   EXTRACT_32BITS(sflow_processor_counter->five_min_util),
479 	   EXTRACT_64BITS(sflow_processor_counter->total_memory),
480 	   EXTRACT_64BITS(sflow_processor_counter->free_memory)));
481 
482     return 0;
483 
484 trunc:
485     return 1;
486 }
487 
488 static int
sflow_print_counter_records(netdissect_options * ndo,const u_char * pointer,u_int len,u_int records)489 sflow_print_counter_records(netdissect_options *ndo,
490                             const u_char *pointer, u_int len, u_int records)
491 {
492     u_int nrecords;
493     const u_char *tptr;
494     u_int tlen;
495     u_int counter_type;
496     u_int counter_len;
497     u_int enterprise;
498     const struct sflow_counter_record_t *sflow_counter_record;
499 
500     nrecords = records;
501     tptr = pointer;
502     tlen = len;
503 
504     while (nrecords > 0) {
505 	/* do we have the "header?" */
506 	if (tlen < sizeof(struct sflow_counter_record_t))
507 	    return 1;
508 	sflow_counter_record = (const struct sflow_counter_record_t *)tptr;
509 	ND_TCHECK(*sflow_counter_record);
510 
511 	enterprise = EXTRACT_32BITS(sflow_counter_record->format);
512 	counter_type = enterprise & 0x0FFF;
513 	enterprise = enterprise >> 20;
514 	counter_len  = EXTRACT_32BITS(sflow_counter_record->length);
515 	ND_PRINT((ndo, "\n\t    enterprise %u, %s (%u) length %u",
516 	       enterprise,
517 	       (enterprise == 0) ? tok2str(sflow_counter_type_values,"Unknown",counter_type) : "Unknown",
518 	       counter_type,
519 	       counter_len));
520 
521 	tptr += sizeof(struct sflow_counter_record_t);
522 	tlen -= sizeof(struct sflow_counter_record_t);
523 
524 	if (tlen < counter_len)
525 	    return 1;
526 	if (enterprise == 0) {
527 	    switch (counter_type) {
528 	    case SFLOW_COUNTER_GENERIC:
529 		if (print_sflow_counter_generic(ndo, tptr, tlen))
530 		    return 1;
531 		break;
532 	    case SFLOW_COUNTER_ETHERNET:
533 		if (print_sflow_counter_ethernet(ndo, tptr, tlen))
534 		    return 1;
535 		break;
536 	    case SFLOW_COUNTER_TOKEN_RING:
537 		if (print_sflow_counter_token_ring(ndo, tptr,tlen))
538 		    return 1;
539 		break;
540 	    case SFLOW_COUNTER_BASEVG:
541 		if (print_sflow_counter_basevg(ndo, tptr, tlen))
542 		    return 1;
543 		break;
544 	    case SFLOW_COUNTER_VLAN:
545 		if (print_sflow_counter_vlan(ndo, tptr, tlen))
546 		    return 1;
547 		break;
548 	    case SFLOW_COUNTER_PROCESSOR:
549 		if (print_sflow_counter_processor(ndo, tptr, tlen))
550 		    return 1;
551 		break;
552 	    default:
553 		if (ndo->ndo_vflag <= 1)
554 		    print_unknown_data(ndo, tptr, "\n\t\t", counter_len);
555 		break;
556 	    }
557 	}
558 	tptr += counter_len;
559 	tlen -= counter_len;
560 	nrecords--;
561 
562     }
563 
564     return 0;
565 
566 trunc:
567     return 1;
568 }
569 
570 static int
sflow_print_counter_sample(netdissect_options * ndo,const u_char * pointer,u_int len)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
sflow_print_expanded_counter_sample(netdissect_options * ndo,const u_char * pointer,u_int len)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
print_sflow_raw_packet(netdissect_options * ndo,const u_char * pointer,u_int len)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
print_sflow_ethernet_frame(netdissect_options * ndo,const u_char * pointer,u_int len)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
print_sflow_extended_switch_data(netdissect_options * ndo,const u_char * pointer,u_int len)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
sflow_print_flow_records(netdissect_options * ndo,const u_char * pointer,u_int len,u_int records)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
sflow_print_flow_sample(netdissect_options * ndo,const u_char * pointer,u_int len)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 = (const 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
sflow_print_expanded_flow_sample(netdissect_options * ndo,const u_char * pointer,u_int len)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
sflow_print(netdissect_options * ndo,const u_char * pptr,u_int len)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  */
992