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