contrib/tcpdump/print-sflow.c

   1 /*
   2  * Copyright (c) 1998-2007 The TCPDUMP project
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that: (1) source code
   6  * distributions retain the above copyright notice and this paragraph
   7  * in its entirety, and (2) distributions including binary code include
   8  * the above copyright notice and this paragraph in its entirety in
   9  * the documentation or other materials provided with the distribution.
  10  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND
  11  * WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT
  12  * LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  13  * FOR A PARTICULAR PURPOSE.
  14  *
  15  * 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_sample_header {
  69     nd_uint32_t format;
  70     nd_uint32_t len;
  71 };
  72
  73 #define         SFLOW_FLOW_SAMPLE               1
  74 #define         SFLOW_COUNTER_SAMPLE            2
  75 #define         SFLOW_EXPANDED_FLOW_SAMPLE      3
  76 #define         SFLOW_EXPANDED_COUNTER_SAMPLE   4
  77
  78 static const struct tok sflow_format_values[] = {
  79     { SFLOW_FLOW_SAMPLE, "flow sample" },
  80     { SFLOW_COUNTER_SAMPLE, "counter sample" },
  81     { SFLOW_EXPANDED_FLOW_SAMPLE, "expanded flow sample" },
  82     { SFLOW_EXPANDED_COUNTER_SAMPLE, "expanded counter sample" },
  83     { 0, NULL}
  84 };
  85
  86 struct sflow_flow_sample_t {
  87     nd_uint32_t seqnum;
  88     nd_uint8_t  type;
  89     nd_uint24_t index;
  90     nd_uint32_t rate;
  91     nd_uint32_t pool;
  92     nd_uint32_t drops;
  93     nd_uint32_t in_interface;
  94     nd_uint32_t out_interface;
  95     nd_uint32_t records;
  96
  97 };
  98
  99 struct sflow_expanded_flow_sample_t {
 100     nd_uint32_t seqnum;
 101     nd_uint32_t type;
 102     nd_uint32_t index;
 103     nd_uint32_t rate;
 104     nd_uint32_t pool;
 105     nd_uint32_t drops;
 106     nd_uint32_t in_interface_format;
 107     nd_uint32_t in_interface_value;
 108     nd_uint32_t out_interface_format;
 109     nd_uint32_t out_interface_value;
 110     nd_uint32_t records;
 111 };
 112
 113 #define         SFLOW_FLOW_RAW_PACKET                   1
 114 #define         SFLOW_FLOW_ETHERNET_FRAME               2
 115 #define         SFLOW_FLOW_IPV4_DATA                    3
 116 #define         SFLOW_FLOW_IPV6_DATA                    4
 117 #define         SFLOW_FLOW_EXTENDED_SWITCH_DATA         1001
 118 #define         SFLOW_FLOW_EXTENDED_ROUTER_DATA         1002
 119 #define         SFLOW_FLOW_EXTENDED_GATEWAY_DATA        1003
 120 #define         SFLOW_FLOW_EXTENDED_USER_DATA           1004
 121 #define         SFLOW_FLOW_EXTENDED_URL_DATA            1005
 122 #define         SFLOW_FLOW_EXTENDED_MPLS_DATA           1006
 123 #define         SFLOW_FLOW_EXTENDED_NAT_DATA            1007
 124 #define         SFLOW_FLOW_EXTENDED_MPLS_TUNNEL         1008
 125 #define         SFLOW_FLOW_EXTENDED_MPLS_VC             1009
 126 #define         SFLOW_FLOW_EXTENDED_MPLS_FEC            1010
 127 #define         SFLOW_FLOW_EXTENDED_MPLS_LVP_FEC        1011
 128 #define         SFLOW_FLOW_EXTENDED_VLAN_TUNNEL         1012
 129
 130 static const struct tok sflow_flow_type_values[] = {
 131     { SFLOW_FLOW_RAW_PACKET, "Raw packet"},
 132     { SFLOW_FLOW_ETHERNET_FRAME, "Ethernet frame"},
 133     { SFLOW_FLOW_IPV4_DATA, "IPv4 Data"},
 134     { SFLOW_FLOW_IPV6_DATA, "IPv6 Data"},
 135     { SFLOW_FLOW_EXTENDED_SWITCH_DATA, "Extended Switch data"},
 136     { SFLOW_FLOW_EXTENDED_ROUTER_DATA, "Extended Router data"},
 137     { SFLOW_FLOW_EXTENDED_GATEWAY_DATA, "Extended Gateway data"},
 138     { SFLOW_FLOW_EXTENDED_USER_DATA, "Extended User data"},
 139     { SFLOW_FLOW_EXTENDED_URL_DATA, "Extended URL data"},
 140     { SFLOW_FLOW_EXTENDED_MPLS_DATA, "Extended MPLS data"},
 141     { SFLOW_FLOW_EXTENDED_NAT_DATA, "Extended NAT data"},
 142     { SFLOW_FLOW_EXTENDED_MPLS_TUNNEL, "Extended MPLS tunnel"},
 143     { SFLOW_FLOW_EXTENDED_MPLS_VC, "Extended MPLS VC"},
 144     { SFLOW_FLOW_EXTENDED_MPLS_FEC, "Extended MPLS FEC"},
 145     { SFLOW_FLOW_EXTENDED_MPLS_LVP_FEC, "Extended MPLS LVP FEC"},
 146     { SFLOW_FLOW_EXTENDED_VLAN_TUNNEL, "Extended VLAN Tunnel"},
 147     { 0, NULL}
 148 };
 149
 150 #define         SFLOW_HEADER_PROTOCOL_ETHERNET  1
 151 #define         SFLOW_HEADER_PROTOCOL_IPV4      11
 152 #define         SFLOW_HEADER_PROTOCOL_IPV6      12
 153
 154 static const struct tok sflow_flow_raw_protocol_values[] = {
 155     { SFLOW_HEADER_PROTOCOL_ETHERNET, "Ethernet"},
 156     { SFLOW_HEADER_PROTOCOL_IPV4, "IPv4"},
 157     { SFLOW_HEADER_PROTOCOL_IPV6, "IPv6"},
 158     { 0, NULL}
 159 };
 160
 161 struct sflow_expanded_flow_raw_t {
 162     nd_uint32_t protocol;
 163     nd_uint32_t length;
 164     nd_uint32_t stripped_bytes;
 165     nd_uint32_t header_size;
 166 };
 167
 168 struct sflow_ethernet_frame_t {
 169     nd_uint32_t length;
 170     nd_byte     src_mac[8];
 171     nd_byte     dst_mac[8];
 172     nd_uint32_t type;
 173 };
 174
 175 struct sflow_extended_switch_data_t {
 176     nd_uint32_t src_vlan;
 177     nd_uint32_t src_pri;
 178     nd_uint32_t dst_vlan;
 179     nd_uint32_t dst_pri;
 180 };
 181
 182 struct sflow_counter_record_t {
 183     nd_uint32_t    format;
 184     nd_uint32_t    length;
 185 };
 186
 187 struct sflow_flow_record_t {
 188     nd_uint32_t    format;
 189     nd_uint32_t    length;
 190 };
 191
 192 struct sflow_counter_sample_t {
 193     nd_uint32_t    seqnum;
 194     nd_uint8_t     type;
 195     nd_uint24_t    index;
 196     nd_uint32_t    records;
 197 };
 198
 199 struct sflow_expanded_counter_sample_t {
 200     nd_uint32_t    seqnum;
 201     nd_uint32_t    type;
 202     nd_uint32_t    index;
 203     nd_uint32_t    records;
 204 };
 205
 206 #define         SFLOW_COUNTER_GENERIC           1
 207 #define         SFLOW_COUNTER_ETHERNET          2
 208 #define         SFLOW_COUNTER_TOKEN_RING        3
 209 #define         SFLOW_COUNTER_BASEVG            4
 210 #define         SFLOW_COUNTER_VLAN              5
 211 #define         SFLOW_COUNTER_PROCESSOR         1001
 212
 213 static const struct tok sflow_counter_type_values[] = {
 214     { SFLOW_COUNTER_GENERIC, "Generic counter"},
 215     { SFLOW_COUNTER_ETHERNET, "Ethernet counter"},
 216     { SFLOW_COUNTER_TOKEN_RING, "Token ring counter"},
 217     { SFLOW_COUNTER_BASEVG, "100 BaseVG counter"},
 218     { SFLOW_COUNTER_VLAN, "Vlan counter"},
 219     { SFLOW_COUNTER_PROCESSOR, "Processor counter"},
 220     { 0, NULL}
 221 };
 222
 223 #define         SFLOW_IFACE_DIRECTION_UNKNOWN           0
 224 #define         SFLOW_IFACE_DIRECTION_FULLDUPLEX        1
 225 #define         SFLOW_IFACE_DIRECTION_HALFDUPLEX        2
 226 #define         SFLOW_IFACE_DIRECTION_IN                3
 227 #define         SFLOW_IFACE_DIRECTION_OUT               4
 228
 229 static const struct tok sflow_iface_direction_values[] = {
 230     { SFLOW_IFACE_DIRECTION_UNKNOWN, "unknown"},
 231     { SFLOW_IFACE_DIRECTION_FULLDUPLEX, "full-duplex"},
 232     { SFLOW_IFACE_DIRECTION_HALFDUPLEX, "half-duplex"},
 233     { SFLOW_IFACE_DIRECTION_IN, "in"},
 234     { SFLOW_IFACE_DIRECTION_OUT, "out"},
 235     { 0, NULL}
 236 };
 237
 238 struct sflow_generic_counter_t {
 239     nd_uint32_t    ifindex;
 240     nd_uint32_t    iftype;
 241     nd_uint64_t    ifspeed;
 242     nd_uint32_t    ifdirection;
 243     nd_uint32_t    ifstatus;
 244     nd_uint64_t    ifinoctets;
 245     nd_uint32_t    ifinunicastpkts;
 246     nd_uint32_t    ifinmulticastpkts;
 247     nd_uint32_t    ifinbroadcastpkts;
 248     nd_uint32_t    ifindiscards;
 249     nd_uint32_t    ifinerrors;
 250     nd_uint32_t    ifinunkownprotos;
 251     nd_uint64_t    ifoutoctets;
 252     nd_uint32_t    ifoutunicastpkts;
 253     nd_uint32_t    ifoutmulticastpkts;
 254     nd_uint32_t    ifoutbroadcastpkts;
 255     nd_uint32_t    ifoutdiscards;
 256     nd_uint32_t    ifouterrors;
 257     nd_uint32_t    ifpromiscmode;
 258 };
 259
 260 struct sflow_ethernet_counter_t {
 261     nd_uint32_t    alignerrors;
 262     nd_uint32_t    fcserrors;
 263     nd_uint32_t    single_collision_frames;
 264     nd_uint32_t    multiple_collision_frames;
 265     nd_uint32_t    test_errors;
 266     nd_uint32_t    deferred_transmissions;
 267     nd_uint32_t    late_collisions;
 268     nd_uint32_t    excessive_collisions;
 269     nd_uint32_t    mac_transmit_errors;
 270     nd_uint32_t    carrier_sense_errors;
 271     nd_uint32_t    frame_too_longs;
 272     nd_uint32_t    mac_receive_errors;
 273     nd_uint32_t    symbol_errors;
 274 };
 275
 276 struct sflow_100basevg_counter_t {
 277     nd_uint32_t    in_highpriority_frames;
 278     nd_uint64_t    in_highpriority_octets;
 279     nd_uint32_t    in_normpriority_frames;
 280     nd_uint64_t    in_normpriority_octets;
 281     nd_uint32_t    in_ipmerrors;
 282     nd_uint32_t    in_oversized;
 283     nd_uint32_t    in_data_errors;
 284     nd_uint32_t    in_null_addressed_frames;
 285     nd_uint32_t    out_highpriority_frames;
 286     nd_uint64_t    out_highpriority_octets;
 287     nd_uint32_t    transitioninto_frames;
 288     nd_uint64_t    hc_in_highpriority_octets;
 289     nd_uint64_t    hc_in_normpriority_octets;
 290     nd_uint64_t    hc_out_highpriority_octets;
 291 };
 292
 293 struct sflow_vlan_counter_t {
 294     nd_uint32_t    vlan_id;
 295     nd_uint64_t    octets;
 296     nd_uint32_t    unicast_pkt;
 297     nd_uint32_t    multicast_pkt;
 298     nd_uint32_t    broadcast_pkt;
 299     nd_uint32_t    discards;
 300 };
 301
 302 static int
 303 print_sflow_counter_generic(netdissect_options *ndo,
 304                             const u_char *pointer, u_int len)
 305 {
 306     const struct sflow_generic_counter_t *sflow_gen_counter;
 307
 308     if (len < sizeof(struct sflow_generic_counter_t))
 309         return 1;
 310
 311     sflow_gen_counter = (const struct sflow_generic_counter_t *)pointer;
 312     ND_PRINT("\n\t      ifindex %u, iftype %u, ifspeed %" PRIu64 ", ifdirection %u (%s)",
 313            GET_BE_U_4(sflow_gen_counter->ifindex),
 314            GET_BE_U_4(sflow_gen_counter->iftype),
 315            GET_BE_U_8(sflow_gen_counter->ifspeed),
 316            GET_BE_U_4(sflow_gen_counter->ifdirection),
 317            tok2str(sflow_iface_direction_values, "Unknown",
 318            GET_BE_U_4(sflow_gen_counter->ifdirection)));
 319     ND_PRINT("\n\t      ifstatus %u, adminstatus: %s, operstatus: %s",
 320            GET_BE_U_4(sflow_gen_counter->ifstatus),
 321            GET_BE_U_4(sflow_gen_counter->ifstatus)&1 ? "up" : "down",
 322            (GET_BE_U_4(sflow_gen_counter->ifstatus)>>1)&1 ? "up" : "down");
 323     ND_PRINT("\n\t      In octets %" PRIu64
 324            ", unicast pkts %u, multicast pkts %u, broadcast pkts %u, discards %u",
 325            GET_BE_U_8(sflow_gen_counter->ifinoctets),
 326            GET_BE_U_4(sflow_gen_counter->ifinunicastpkts),
 327            GET_BE_U_4(sflow_gen_counter->ifinmulticastpkts),
 328            GET_BE_U_4(sflow_gen_counter->ifinbroadcastpkts),
 329            GET_BE_U_4(sflow_gen_counter->ifindiscards));
 330     ND_PRINT("\n\t      In errors %u, unknown protos %u",
 331            GET_BE_U_4(sflow_gen_counter->ifinerrors),
 332            GET_BE_U_4(sflow_gen_counter->ifinunkownprotos));
 333     ND_PRINT("\n\t      Out octets %" PRIu64
 334            ", unicast pkts %u, multicast pkts %u, broadcast pkts %u, discards %u",
 335            GET_BE_U_8(sflow_gen_counter->ifoutoctets),
 336            GET_BE_U_4(sflow_gen_counter->ifoutunicastpkts),
 337            GET_BE_U_4(sflow_gen_counter->ifoutmulticastpkts),
 338            GET_BE_U_4(sflow_gen_counter->ifoutbroadcastpkts),
 339            GET_BE_U_4(sflow_gen_counter->ifoutdiscards));
 340     ND_PRINT("\n\t      Out errors %u, promisc mode %u",
 341            GET_BE_U_4(sflow_gen_counter->ifouterrors),
 342            GET_BE_U_4(sflow_gen_counter->ifpromiscmode));
 343
 344     return 0;
 345 }
 346
 347 static int
 348 print_sflow_counter_ethernet(netdissect_options *ndo,
 349                              const u_char *pointer, u_int len)
 350 {
 351     const struct sflow_ethernet_counter_t *sflow_eth_counter;
 352
 353     if (len < sizeof(struct sflow_ethernet_counter_t))
 354         return 1;
 355
 356     sflow_eth_counter = (const struct sflow_ethernet_counter_t *)pointer;
 357     ND_PRINT("\n\t      align errors %u, fcs errors %u, single collision %u, multiple collision %u, test error %u",
 358            GET_BE_U_4(sflow_eth_counter->alignerrors),
 359            GET_BE_U_4(sflow_eth_counter->fcserrors),
 360            GET_BE_U_4(sflow_eth_counter->single_collision_frames),
 361            GET_BE_U_4(sflow_eth_counter->multiple_collision_frames),
 362            GET_BE_U_4(sflow_eth_counter->test_errors));
 363     ND_PRINT("\n\t      deferred %u, late collision %u, excessive collision %u, mac trans error %u",
 364            GET_BE_U_4(sflow_eth_counter->deferred_transmissions),
 365            GET_BE_U_4(sflow_eth_counter->late_collisions),
 366            GET_BE_U_4(sflow_eth_counter->excessive_collisions),
 367            GET_BE_U_4(sflow_eth_counter->mac_transmit_errors));
 368     ND_PRINT("\n\t      carrier error %u, frames too long %u, mac receive errors %u, symbol errors %u",
 369            GET_BE_U_4(sflow_eth_counter->carrier_sense_errors),
 370            GET_BE_U_4(sflow_eth_counter->frame_too_longs),
 371            GET_BE_U_4(sflow_eth_counter->mac_receive_errors),
 372            GET_BE_U_4(sflow_eth_counter->symbol_errors));
 373
 374     return 0;
 375 }
 376
 377 static int
 378 print_sflow_counter_token_ring(netdissect_options *ndo _U_,
 379                                const u_char *pointer _U_, u_int len _U_)
 380 {
 381     return 0;
 382 }
 383
 384 static int
 385 print_sflow_counter_basevg(netdissect_options *ndo,
 386                            const u_char *pointer, u_int len)
 387 {
 388     const struct sflow_100basevg_counter_t *sflow_100basevg_counter;
 389
 390     if (len < sizeof(struct sflow_100basevg_counter_t))
 391         return 1;
 392
 393     sflow_100basevg_counter = (const struct sflow_100basevg_counter_t *)pointer;
 394     ND_PRINT("\n\t      in high prio frames %u, in high prio octets %" PRIu64,
 395            GET_BE_U_4(sflow_100basevg_counter->in_highpriority_frames),
 396            GET_BE_U_8(sflow_100basevg_counter->in_highpriority_octets));
 397     ND_PRINT("\n\t      in norm prio frames %u, in norm prio octets %" PRIu64,
 398            GET_BE_U_4(sflow_100basevg_counter->in_normpriority_frames),
 399            GET_BE_U_8(sflow_100basevg_counter->in_normpriority_octets));
 400     ND_PRINT("\n\t      in ipm errors %u, oversized %u, in data errors %u, null addressed frames %u",
 401            GET_BE_U_4(sflow_100basevg_counter->in_ipmerrors),
 402            GET_BE_U_4(sflow_100basevg_counter->in_oversized),
 403            GET_BE_U_4(sflow_100basevg_counter->in_data_errors),
 404            GET_BE_U_4(sflow_100basevg_counter->in_null_addressed_frames));
 405     ND_PRINT("\n\t      out high prio frames %u, out high prio octets %" PRIu64
 406            ", trans into frames %u",
 407            GET_BE_U_4(sflow_100basevg_counter->out_highpriority_frames),
 408            GET_BE_U_8(sflow_100basevg_counter->out_highpriority_octets),
 409            GET_BE_U_4(sflow_100basevg_counter->transitioninto_frames));
 410     ND_PRINT("\n\t      in hc high prio octets %" PRIu64
 411            ", in hc norm prio octets %" PRIu64
 412            ", out hc high prio octets %" PRIu64,
 413            GET_BE_U_8(sflow_100basevg_counter->hc_in_highpriority_octets),
 414            GET_BE_U_8(sflow_100basevg_counter->hc_in_normpriority_octets),
 415            GET_BE_U_8(sflow_100basevg_counter->hc_out_highpriority_octets));
 416
 417     return 0;
 418 }
 419
 420 static int
 421 print_sflow_counter_vlan(netdissect_options *ndo,
 422                          const u_char *pointer, u_int len)
 423 {
 424     const struct sflow_vlan_counter_t *sflow_vlan_counter;
 425
 426     if (len < sizeof(struct sflow_vlan_counter_t))
 427         return 1;
 428
 429     sflow_vlan_counter = (const struct sflow_vlan_counter_t *)pointer;
 430     ND_PRINT("\n\t      vlan_id %u, octets %" PRIu64
 431            ", unicast_pkt %u, multicast_pkt %u, broadcast_pkt %u, discards %u",
 432            GET_BE_U_4(sflow_vlan_counter->vlan_id),
 433            GET_BE_U_8(sflow_vlan_counter->octets),
 434            GET_BE_U_4(sflow_vlan_counter->unicast_pkt),
 435            GET_BE_U_4(sflow_vlan_counter->multicast_pkt),
 436            GET_BE_U_4(sflow_vlan_counter->broadcast_pkt),
 437            GET_BE_U_4(sflow_vlan_counter->discards));
 438
 439     return 0;
 440 }
 441
 442 struct sflow_processor_counter_t {
 443     nd_uint32_t five_sec_util;
 444     nd_uint32_t one_min_util;
 445     nd_uint32_t five_min_util;
 446     nd_uint64_t total_memory;
 447     nd_uint64_t free_memory;
 448 };
 449
 450 static int
 451 print_sflow_counter_processor(netdissect_options *ndo,
 452                               const u_char *pointer, u_int len)
 453 {
 454     const struct sflow_processor_counter_t *sflow_processor_counter;
 455
 456     if (len < sizeof(struct sflow_processor_counter_t))
 457         return 1;
 458
 459     sflow_processor_counter = (const struct sflow_processor_counter_t *)pointer;
 460     ND_PRINT("\n\t      5sec %u, 1min %u, 5min %u, total_mem %" PRIu64
 461            ", total_mem %" PRIu64,
 462            GET_BE_U_4(sflow_processor_counter->five_sec_util),
 463            GET_BE_U_4(sflow_processor_counter->one_min_util),
 464            GET_BE_U_4(sflow_processor_counter->five_min_util),
 465            GET_BE_U_8(sflow_processor_counter->total_memory),
 466            GET_BE_U_8(sflow_processor_counter->free_memory));
 467
 468     return 0;
 469 }
 470
 471 static int
 472 sflow_print_counter_records(netdissect_options *ndo,
 473                             const u_char *pointer, u_int len, u_int records)
 474 {
 475     u_int nrecords;
 476     const u_char *tptr;
 477     u_int tlen;
 478     u_int counter_type;
 479     u_int counter_len;
 480     u_int enterprise;
 481     const struct sflow_counter_record_t *sflow_counter_record;
 482
 483     nrecords = records;
 484     tptr = pointer;
 485     tlen = len;
 486
 487     while (nrecords > 0) {
 488         /* do we have the "header?" */
 489         if (tlen < sizeof(struct sflow_counter_record_t))
 490             return 1;
 491         sflow_counter_record = (const struct sflow_counter_record_t *)tptr;
 492
 493         enterprise = GET_BE_U_4(sflow_counter_record->format);
 494         counter_type = enterprise & 0x0FFF;
 495         enterprise = enterprise >> 20;
 496         counter_len  = GET_BE_U_4(sflow_counter_record->length);
 497         ND_PRINT("\n\t    enterprise %u, %s (%u) length %u",
 498                enterprise,
 499                (enterprise == 0) ? tok2str(sflow_counter_type_values,"Unknown",counter_type) : "Unknown",
 500                counter_type,
 501                counter_len);
 502
 503         tptr += sizeof(struct sflow_counter_record_t);
 504         tlen -= sizeof(struct sflow_counter_record_t);
 505
 506         if (tlen < counter_len)
 507             return 1;
 508         if (enterprise == 0) {
 509             switch (counter_type) {
 510             case SFLOW_COUNTER_GENERIC:
 511                 if (print_sflow_counter_generic(ndo, tptr, tlen))
 512                     return 1;
 513                 break;
 514             case SFLOW_COUNTER_ETHERNET:
 515                 if (print_sflow_counter_ethernet(ndo, tptr, tlen))
 516                     return 1;
 517                 break;
 518             case SFLOW_COUNTER_TOKEN_RING:
 519                 if (print_sflow_counter_token_ring(ndo, tptr,tlen))
 520                     return 1;
 521                 break;
 522             case SFLOW_COUNTER_BASEVG:
 523                 if (print_sflow_counter_basevg(ndo, tptr, tlen))
 524                     return 1;
 525                 break;
 526             case SFLOW_COUNTER_VLAN:
 527                 if (print_sflow_counter_vlan(ndo, tptr, tlen))
 528                     return 1;
 529                 break;
 530             case SFLOW_COUNTER_PROCESSOR:
 531                 if (print_sflow_counter_processor(ndo, tptr, tlen))
 532                     return 1;
 533                 break;
 534             default:
 535                 if (ndo->ndo_vflag <= 1)
 536                     print_unknown_data(ndo, tptr, "\n\t\t", counter_len);
 537                 break;
 538             }
 539         }
 540         tptr += counter_len;
 541         tlen -= counter_len;
 542         nrecords--;
 543
 544     }
 545
 546     return 0;
 547 }
 548
 549 static int
 550 sflow_print_counter_sample(netdissect_options *ndo,
 551                            const u_char *pointer, u_int len)
 552 {
 553     const struct sflow_counter_sample_t *sflow_counter_sample;
 554     u_int           nrecords;
 555
 556     if (len < sizeof(struct sflow_counter_sample_t))
 557         return 1;
 558
 559     sflow_counter_sample = (const struct sflow_counter_sample_t *)pointer;
 560
 561     nrecords   = GET_BE_U_4(sflow_counter_sample->records);
 562
 563     ND_PRINT(" seqnum %u, type %u, idx %u, records %u",
 564            GET_BE_U_4(sflow_counter_sample->seqnum),
 565            GET_U_1(sflow_counter_sample->type),
 566            GET_BE_U_3(sflow_counter_sample->index),
 567            nrecords);
 568
 569     return sflow_print_counter_records(ndo, pointer + sizeof(struct sflow_counter_sample_t),
 570                                        len - sizeof(struct sflow_counter_sample_t),
 571                                        nrecords);
 572 }
 573
 574 static int
 575 sflow_print_expanded_counter_sample(netdissect_options *ndo,
 576                                     const u_char *pointer, u_int len)
 577 {
 578     const struct sflow_expanded_counter_sample_t *sflow_expanded_counter_sample;
 579     u_int           nrecords;
 580
 581
 582     if (len < sizeof(struct sflow_expanded_counter_sample_t))
 583         return 1;
 584
 585     sflow_expanded_counter_sample = (const struct sflow_expanded_counter_sample_t *)pointer;
 586
 587     nrecords = GET_BE_U_4(sflow_expanded_counter_sample->records);
 588
 589     ND_PRINT(" seqnum %u, type %u, idx %u, records %u",
 590            GET_BE_U_4(sflow_expanded_counter_sample->seqnum),
 591            GET_BE_U_4(sflow_expanded_counter_sample->type),
 592            GET_BE_U_4(sflow_expanded_counter_sample->index),
 593            nrecords);
 594
 595     return sflow_print_counter_records(ndo, pointer + sizeof(struct sflow_expanded_counter_sample_t),
 596                                        len - sizeof(struct sflow_expanded_counter_sample_t),
 597                                        nrecords);
 598 }
 599
 600 static int
 601 print_sflow_raw_packet(netdissect_options *ndo,
 602                        const u_char *pointer, u_int len)
 603 {
 604     const struct sflow_expanded_flow_raw_t *sflow_flow_raw;
 605
 606     if (len < sizeof(struct sflow_expanded_flow_raw_t))
 607         return 1;
 608
 609     sflow_flow_raw = (const struct sflow_expanded_flow_raw_t *)pointer;
 610     ND_PRINT("\n\t      protocol %s (%u), length %u, stripped bytes %u, header_size %u",
 611            tok2str(sflow_flow_raw_protocol_values,"Unknown",GET_BE_U_4(sflow_flow_raw->protocol)),
 612            GET_BE_U_4(sflow_flow_raw->protocol),
 613            GET_BE_U_4(sflow_flow_raw->length),
 614            GET_BE_U_4(sflow_flow_raw->stripped_bytes),
 615            GET_BE_U_4(sflow_flow_raw->header_size));
 616
 617     /* QUESTION - should we attempt to print the raw header itself?
 618        assuming of course there is enough data present to do so... */
 619
 620     return 0;
 621 }
 622
 623 static int
 624 print_sflow_ethernet_frame(netdissect_options *ndo,
 625                            const u_char *pointer, u_int len)
 626 {
 627     const struct sflow_ethernet_frame_t *sflow_ethernet_frame;
 628
 629     if (len < sizeof(struct sflow_ethernet_frame_t))
 630         return 1;
 631
 632     sflow_ethernet_frame = (const struct sflow_ethernet_frame_t *)pointer;
 633
 634     ND_PRINT("\n\t      frame len %u, type %u",
 635            GET_BE_U_4(sflow_ethernet_frame->length),
 636            GET_BE_U_4(sflow_ethernet_frame->type));
 637
 638     return 0;
 639 }
 640
 641 static int
 642 print_sflow_extended_switch_data(netdissect_options *ndo,
 643                                  const u_char *pointer, u_int len)
 644 {
 645     const struct sflow_extended_switch_data_t *sflow_extended_sw_data;
 646
 647     if (len < sizeof(struct sflow_extended_switch_data_t))
 648         return 1;
 649
 650     sflow_extended_sw_data = (const struct sflow_extended_switch_data_t *)pointer;
 651     ND_PRINT("\n\t      src vlan %u, src pri %u, dst vlan %u, dst pri %u",
 652            GET_BE_U_4(sflow_extended_sw_data->src_vlan),
 653            GET_BE_U_4(sflow_extended_sw_data->src_pri),
 654            GET_BE_U_4(sflow_extended_sw_data->dst_vlan),
 655            GET_BE_U_4(sflow_extended_sw_data->dst_pri));
 656
 657     return 0;
 658 }
 659
 660 static int
 661 sflow_print_flow_records(netdissect_options *ndo,
 662                          const u_char *pointer, u_int len, u_int records)
 663 {
 664     u_int nrecords;
 665     const u_char *tptr;
 666     u_int tlen;
 667     u_int flow_type;
 668     u_int enterprise;
 669     u_int flow_len;
 670     const struct sflow_flow_record_t *sflow_flow_record;
 671
 672     nrecords = records;
 673     tptr = pointer;
 674     tlen = len;
 675
 676     while (nrecords > 0) {
 677         /* do we have the "header?" */
 678         if (tlen < sizeof(struct sflow_flow_record_t))
 679             return 1;
 680
 681         sflow_flow_record = (const struct sflow_flow_record_t *)tptr;
 682
 683         /* so, the funky encoding means we cannot blythly mask-off
 684            bits, we must also check the enterprise. */
 685
 686         enterprise = GET_BE_U_4(sflow_flow_record->format);
 687         flow_type = enterprise & 0x0FFF;
 688         enterprise = enterprise >> 12;
 689         flow_len  = GET_BE_U_4(sflow_flow_record->length);
 690         ND_PRINT("\n\t    enterprise %u %s (%u) length %u",
 691                enterprise,
 692                (enterprise == 0) ? tok2str(sflow_flow_type_values,"Unknown",flow_type) : "Unknown",
 693                flow_type,
 694                flow_len);
 695
 696         tptr += sizeof(struct sflow_flow_record_t);
 697         tlen -= sizeof(struct sflow_flow_record_t);
 698
 699         if (tlen < flow_len)
 700             return 1;
 701
 702         if (enterprise == 0) {
 703             switch (flow_type) {
 704             case SFLOW_FLOW_RAW_PACKET:
 705                 if (print_sflow_raw_packet(ndo, tptr, tlen))
 706                     return 1;
 707                 break;
 708             case SFLOW_FLOW_EXTENDED_SWITCH_DATA:
 709                 if (print_sflow_extended_switch_data(ndo, tptr, tlen))
 710                     return 1;
 711                 break;
 712             case SFLOW_FLOW_ETHERNET_FRAME:
 713                 if (print_sflow_ethernet_frame(ndo, tptr, tlen))
 714                     return 1;
 715                 break;
 716                 /* FIXME these need a decoder */
 717             case SFLOW_FLOW_IPV4_DATA:
 718             case SFLOW_FLOW_IPV6_DATA:
 719             case SFLOW_FLOW_EXTENDED_ROUTER_DATA:
 720             case SFLOW_FLOW_EXTENDED_GATEWAY_DATA:
 721             case SFLOW_FLOW_EXTENDED_USER_DATA:
 722             case SFLOW_FLOW_EXTENDED_URL_DATA:
 723             case SFLOW_FLOW_EXTENDED_MPLS_DATA:
 724             case SFLOW_FLOW_EXTENDED_NAT_DATA:
 725             case SFLOW_FLOW_EXTENDED_MPLS_TUNNEL:
 726             case SFLOW_FLOW_EXTENDED_MPLS_VC:
 727             case SFLOW_FLOW_EXTENDED_MPLS_FEC:
 728             case SFLOW_FLOW_EXTENDED_MPLS_LVP_FEC:
 729             case SFLOW_FLOW_EXTENDED_VLAN_TUNNEL:
 730                 break;
 731             default:
 732                 if (ndo->ndo_vflag <= 1)
 733                     print_unknown_data(ndo, tptr, "\n\t\t", flow_len);
 734                 break;
 735             }
 736         }
 737         tptr += flow_len;
 738         tlen -= flow_len;
 739         nrecords--;
 740
 741     }
 742
 743     return 0;
 744 }
 745
 746 static int
 747 sflow_print_flow_sample(netdissect_options *ndo,
 748                         const u_char *pointer, u_int len)
 749 {
 750     const struct sflow_flow_sample_t *sflow_flow_sample;
 751     u_int          nrecords;
 752
 753     if (len < sizeof(struct sflow_flow_sample_t))
 754         return 1;
 755
 756     sflow_flow_sample = (const struct sflow_flow_sample_t *)pointer;
 757
 758     nrecords = GET_BE_U_4(sflow_flow_sample->records);
 759
 760     ND_PRINT(" seqnum %u, type %u, idx %u, rate %u, pool %u, drops %u, input %u output %u records %u",
 761            GET_BE_U_4(sflow_flow_sample->seqnum),
 762            GET_U_1(sflow_flow_sample->type),
 763            GET_BE_U_3(sflow_flow_sample->index),
 764            GET_BE_U_4(sflow_flow_sample->rate),
 765            GET_BE_U_4(sflow_flow_sample->pool),
 766            GET_BE_U_4(sflow_flow_sample->drops),
 767            GET_BE_U_4(sflow_flow_sample->in_interface),
 768            GET_BE_U_4(sflow_flow_sample->out_interface),
 769            nrecords);
 770
 771     return sflow_print_flow_records(ndo, pointer + sizeof(struct sflow_flow_sample_t),
 772                                     len - sizeof(struct sflow_flow_sample_t),
 773                                     nrecords);
 774 }
 775
 776 static int
 777 sflow_print_expanded_flow_sample(netdissect_options *ndo,
 778                                  const u_char *pointer, u_int len)
 779 {
 780     const struct sflow_expanded_flow_sample_t *sflow_expanded_flow_sample;
 781     u_int nrecords;
 782
 783     if (len < sizeof(struct sflow_expanded_flow_sample_t))
 784         return 1;
 785
 786     sflow_expanded_flow_sample = (const struct sflow_expanded_flow_sample_t *)pointer;
 787
 788     nrecords = GET_BE_U_4(sflow_expanded_flow_sample->records);
 789
 790     ND_PRINT(" seqnum %u, type %u, idx %u, rate %u, pool %u, drops %u, records %u",
 791            GET_BE_U_4(sflow_expanded_flow_sample->seqnum),
 792            GET_BE_U_4(sflow_expanded_flow_sample->type),
 793            GET_BE_U_4(sflow_expanded_flow_sample->index),
 794            GET_BE_U_4(sflow_expanded_flow_sample->rate),
 795            GET_BE_U_4(sflow_expanded_flow_sample->pool),
 796            GET_BE_U_4(sflow_expanded_flow_sample->drops),
 797            nrecords);
 798
 799     return sflow_print_flow_records(ndo, pointer + sizeof(struct sflow_expanded_flow_sample_t),
 800                                     len - sizeof(struct sflow_expanded_flow_sample_t),
 801                                     nrecords);
 802 }
 803
 804 void
 805 sflow_print(netdissect_options *ndo,
 806             const u_char *pptr, u_int len)
 807 {
 808     const struct sflow_datagram_t *sflow_datagram;
 809     const struct sflow_sample_header *sflow_sample;
 810
 811     const u_char *tptr;
 812     u_int tlen;
 813     uint32_t sflow_sample_type, sflow_sample_len;
 814     uint32_t nsamples;
 815
 816     ndo->ndo_protocol = "sflow";
 817     tptr = pptr;
 818     tlen = len;
 819     sflow_datagram = (const struct sflow_datagram_t *)pptr;
 820     if (len < sizeof(struct sflow_datagram_t)) {
 821         ND_PRINT("sFlowv%u", GET_BE_U_4(sflow_datagram->version));
 822         ND_PRINT(" [length %u < %zu]", len, sizeof(struct sflow_datagram_t));
 823         nd_print_invalid(ndo);
 824         return;
 825     }
 826     ND_TCHECK_SIZE(sflow_datagram);
 827
 828     /*
 829      * Sanity checking of the header.
 830      */
 831     if (GET_BE_U_4(sflow_datagram->version) != 5) {
 832         ND_PRINT("sFlow version %u packet not supported",
 833                GET_BE_U_4(sflow_datagram->version));
 834         return;
 835     }
 836
 837     if (ndo->ndo_vflag < 1) {
 838         ND_PRINT("sFlowv%u, %s agent %s, agent-id %u, length %u",
 839                GET_BE_U_4(sflow_datagram->version),
 840                GET_BE_U_4(sflow_datagram->ip_version) == 1 ? "IPv4" : "IPv6",
 841                GET_IPADDR_STRING(sflow_datagram->agent),
 842                GET_BE_U_4(sflow_datagram->agent_id),
 843                len);
 844         return;
 845     }
 846
 847     /* ok they seem to want to know everything - lets fully decode it */
 848     nsamples=GET_BE_U_4(sflow_datagram->samples);
 849     ND_PRINT("sFlowv%u, %s agent %s, agent-id %u, seqnum %u, uptime %u, samples %u, length %u",
 850            GET_BE_U_4(sflow_datagram->version),
 851            GET_BE_U_4(sflow_datagram->ip_version) == 1 ? "IPv4" : "IPv6",
 852            GET_IPADDR_STRING(sflow_datagram->agent),
 853            GET_BE_U_4(sflow_datagram->agent_id),
 854            GET_BE_U_4(sflow_datagram->seqnum),
 855            GET_BE_U_4(sflow_datagram->uptime),
 856            nsamples,
 857            len);
 858
 859     /* skip Common header */
 860     tptr += sizeof(struct sflow_datagram_t);
 861     tlen -= sizeof(struct sflow_datagram_t);
 862
 863     while (nsamples > 0 && tlen > 0) {
 864         sflow_sample = (const struct sflow_sample_header *)tptr;
 865
 866         sflow_sample_type = (GET_BE_U_4(sflow_sample->format)&0x0FFF);
 867         sflow_sample_len = GET_BE_U_4(sflow_sample->len);
 868
 869         if (tlen < sizeof(struct sflow_sample_header))
 870             goto invalid;
 871
 872         tptr += sizeof(struct sflow_sample_header);
 873         tlen -= sizeof(struct sflow_sample_header);
 874
 875         ND_PRINT("\n\t%s (%u), length %u,",
 876                tok2str(sflow_format_values, "Unknown", sflow_sample_type),
 877                sflow_sample_type,
 878                sflow_sample_len);
 879
 880         /* basic sanity check */
 881         if (sflow_sample_type == 0 || sflow_sample_len ==0) {
 882             return;
 883         }
 884
 885         if (tlen < sflow_sample_len)
 886             goto invalid;
 887
 888         /* did we capture enough for fully decoding the sample ? */
 889         ND_TCHECK_LEN(tptr, sflow_sample_len);
 890
 891         switch(sflow_sample_type) {
 892         case SFLOW_FLOW_SAMPLE:
 893             if (sflow_print_flow_sample(ndo, tptr, tlen))
 894                 goto invalid;
 895             break;
 896
 897         case SFLOW_COUNTER_SAMPLE:
 898             if (sflow_print_counter_sample(ndo, tptr,tlen))
 899                 goto invalid;
 900             break;
 901
 902         case SFLOW_EXPANDED_FLOW_SAMPLE:
 903             if (sflow_print_expanded_flow_sample(ndo, tptr, tlen))
 904                 goto invalid;
 905             break;
 906
 907         case SFLOW_EXPANDED_COUNTER_SAMPLE:
 908             if (sflow_print_expanded_counter_sample(ndo, tptr,tlen))
 909                 goto invalid;
 910             break;
 911
 912         default:
 913             if (ndo->ndo_vflag <= 1)
 914                 print_unknown_data(ndo, tptr, "\n\t    ", sflow_sample_len);
 915             break;
 916         }
 917         tptr += sflow_sample_len;
 918         tlen -= sflow_sample_len;
 919         nsamples--;
 920     }
 921     return;
 922
 923 invalid:
 924     nd_print_invalid(ndo);
 925     ND_TCHECK_LEN(tptr, tlen);
 926 }