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 #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     nd_uint32_t version;
  59     nd_uint32_t ip_version;
  60     nd_ipv4     agent;
  61     nd_uint32_t agent_id;
  62     nd_uint32_t seqnum;
  63     nd_uint32_t uptime;
  64     nd_uint32_t samples;
  65 };
  66
  67 struct sflow_sample_header {
  68     nd_uint32_t format;
  69     nd_uint32_t len;
  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     nd_uint32_t seqnum;
  87     nd_uint8_t  type;
  88     nd_uint24_t index;
  89     nd_uint32_t rate;
  90     nd_uint32_t pool;
  91     nd_uint32_t drops;
  92     nd_uint32_t in_interface;
  93     nd_uint32_t out_interface;
  94     nd_uint32_t records;
  95
  96 };
  97
  98 struct sflow_expanded_flow_sample_t {
  99     nd_uint32_t seqnum;
 100     nd_uint32_t type;
 101     nd_uint32_t index;
 102     nd_uint32_t rate;
 103     nd_uint32_t pool;
 104     nd_uint32_t drops;
 105     nd_uint32_t in_interface_format;
 106     nd_uint32_t in_interface_value;
 107     nd_uint32_t out_interface_format;
 108     nd_uint32_t out_interface_value;
 109     nd_uint32_t records;
 110 };
 111
 112 #define         SFLOW_FLOW_RAW_PACKET                   1
 113 #define         SFLOW_FLOW_ETHERNET_FRAME               2
 114 #define         SFLOW_FLOW_IPV4_DATA                    3
 115 #define         SFLOW_FLOW_IPV6_DATA                    4
 116 #define         SFLOW_FLOW_EXTENDED_SWITCH_DATA         1001
 117 #define         SFLOW_FLOW_EXTENDED_ROUTER_DATA         1002
 118 #define         SFLOW_FLOW_EXTENDED_GATEWAY_DATA        1003
 119 #define         SFLOW_FLOW_EXTENDED_USER_DATA           1004
 120 #define         SFLOW_FLOW_EXTENDED_URL_DATA            1005
 121 #define         SFLOW_FLOW_EXTENDED_MPLS_DATA           1006
 122 #define         SFLOW_FLOW_EXTENDED_NAT_DATA            1007
 123 #define         SFLOW_FLOW_EXTENDED_MPLS_TUNNEL         1008
 124 #define         SFLOW_FLOW_EXTENDED_MPLS_VC             1009
 125 #define         SFLOW_FLOW_EXTENDED_MPLS_FEC            1010
 126 #define         SFLOW_FLOW_EXTENDED_MPLS_LVP_FEC        1011
 127 #define         SFLOW_FLOW_EXTENDED_VLAN_TUNNEL         1012
 128
 129 static const struct tok sflow_flow_type_values[] = {
 130     { SFLOW_FLOW_RAW_PACKET, "Raw packet"},
 131     { SFLOW_FLOW_ETHERNET_FRAME, "Ethernet frame"},
 132     { SFLOW_FLOW_IPV4_DATA, "IPv4 Data"},
 133     { SFLOW_FLOW_IPV6_DATA, "IPv6 Data"},
 134     { SFLOW_FLOW_EXTENDED_SWITCH_DATA, "Extended Switch data"},
 135     { SFLOW_FLOW_EXTENDED_ROUTER_DATA, "Extended Router data"},
 136     { SFLOW_FLOW_EXTENDED_GATEWAY_DATA, "Extended Gateway data"},
 137     { SFLOW_FLOW_EXTENDED_USER_DATA, "Extended User data"},
 138     { SFLOW_FLOW_EXTENDED_URL_DATA, "Extended URL data"},
 139     { SFLOW_FLOW_EXTENDED_MPLS_DATA, "Extended MPLS data"},
 140     { SFLOW_FLOW_EXTENDED_NAT_DATA, "Extended NAT data"},
 141     { SFLOW_FLOW_EXTENDED_MPLS_TUNNEL, "Extended MPLS tunnel"},
 142     { SFLOW_FLOW_EXTENDED_MPLS_VC, "Extended MPLS VC"},
 143     { SFLOW_FLOW_EXTENDED_MPLS_FEC, "Extended MPLS FEC"},
 144     { SFLOW_FLOW_EXTENDED_MPLS_LVP_FEC, "Extended MPLS LVP FEC"},
 145     { SFLOW_FLOW_EXTENDED_VLAN_TUNNEL, "Extended VLAN Tunnel"},
 146     { 0, NULL}
 147 };
 148
 149 #define         SFLOW_HEADER_PROTOCOL_ETHERNET  1
 150 #define         SFLOW_HEADER_PROTOCOL_IPV4      11
 151 #define         SFLOW_HEADER_PROTOCOL_IPV6      12
 152
 153 static const struct tok sflow_flow_raw_protocol_values[] = {
 154     { SFLOW_HEADER_PROTOCOL_ETHERNET, "Ethernet"},
 155     { SFLOW_HEADER_PROTOCOL_IPV4, "IPv4"},
 156     { SFLOW_HEADER_PROTOCOL_IPV6, "IPv6"},
 157     { 0, NULL}
 158 };
 159
 160 struct sflow_expanded_flow_raw_t {
 161     nd_uint32_t protocol;
 162     nd_uint32_t length;
 163     nd_uint32_t stripped_bytes;
 164     nd_uint32_t header_size;
 165 };
 166
 167 struct sflow_ethernet_frame_t {
 168     nd_uint32_t length;
 169     nd_byte     src_mac[8];
 170     nd_byte     dst_mac[8];
 171     nd_uint32_t type;
 172 };
 173
 174 struct sflow_extended_switch_data_t {
 175     nd_uint32_t src_vlan;
 176     nd_uint32_t src_pri;
 177     nd_uint32_t dst_vlan;
 178     nd_uint32_t dst_pri;
 179 };
 180
 181 struct sflow_counter_record_t {
 182     nd_uint32_t    format;
 183     nd_uint32_t    length;
 184 };
 185
 186 struct sflow_flow_record_t {
 187     nd_uint32_t    format;
 188     nd_uint32_t    length;
 189 };
 190
 191 struct sflow_counter_sample_t {
 192     nd_uint32_t    seqnum;
 193     nd_uint8_t     type;
 194     nd_uint24_t    index;
 195     nd_uint32_t    records;
 196 };
 197
 198 struct sflow_expanded_counter_sample_t {
 199     nd_uint32_t    seqnum;
 200     nd_uint32_t    type;
 201     nd_uint32_t    index;
 202     nd_uint32_t    records;
 203 };
 204
 205 #define         SFLOW_COUNTER_GENERIC           1
 206 #define         SFLOW_COUNTER_ETHERNET          2
 207 #define         SFLOW_COUNTER_TOKEN_RING        3
 208 #define         SFLOW_COUNTER_BASEVG            4
 209 #define         SFLOW_COUNTER_VLAN              5
 210 #define         SFLOW_COUNTER_PROCESSOR         1001
 211
 212 static const struct tok sflow_counter_type_values[] = {
 213     { SFLOW_COUNTER_GENERIC, "Generic counter"},
 214     { SFLOW_COUNTER_ETHERNET, "Ethernet counter"},
 215     { SFLOW_COUNTER_TOKEN_RING, "Token ring counter"},
 216     { SFLOW_COUNTER_BASEVG, "100 BaseVG counter"},
 217     { SFLOW_COUNTER_VLAN, "Vlan counter"},
 218     { SFLOW_COUNTER_PROCESSOR, "Processor counter"},
 219     { 0, NULL}
 220 };
 221
 222 #define         SFLOW_IFACE_DIRECTION_UNKNOWN           0
 223 #define         SFLOW_IFACE_DIRECTION_FULLDUPLEX        1
 224 #define         SFLOW_IFACE_DIRECTION_HALFDUPLEX        2
 225 #define         SFLOW_IFACE_DIRECTION_IN                3
 226 #define         SFLOW_IFACE_DIRECTION_OUT               4
 227
 228 static const struct tok sflow_iface_direction_values[] = {
 229     { SFLOW_IFACE_DIRECTION_UNKNOWN, "unknown"},
 230     { SFLOW_IFACE_DIRECTION_FULLDUPLEX, "full-duplex"},
 231     { SFLOW_IFACE_DIRECTION_HALFDUPLEX, "half-duplex"},
 232     { SFLOW_IFACE_DIRECTION_IN, "in"},
 233     { SFLOW_IFACE_DIRECTION_OUT, "out"},
 234     { 0, NULL}
 235 };
 236
 237 struct sflow_generic_counter_t {
 238     nd_uint32_t    ifindex;
 239     nd_uint32_t    iftype;
 240     nd_uint64_t    ifspeed;
 241     nd_uint32_t    ifdirection;
 242     nd_uint32_t    ifstatus;
 243     nd_uint64_t    ifinoctets;
 244     nd_uint32_t    ifinunicastpkts;
 245     nd_uint32_t    ifinmulticastpkts;
 246     nd_uint32_t    ifinbroadcastpkts;
 247     nd_uint32_t    ifindiscards;
 248     nd_uint32_t    ifinerrors;
 249     nd_uint32_t    ifinunkownprotos;
 250     nd_uint64_t    ifoutoctets;
 251     nd_uint32_t    ifoutunicastpkts;
 252     nd_uint32_t    ifoutmulticastpkts;
 253     nd_uint32_t    ifoutbroadcastpkts;
 254     nd_uint32_t    ifoutdiscards;
 255     nd_uint32_t    ifouterrors;
 256     nd_uint32_t    ifpromiscmode;
 257 };
 258
 259 struct sflow_ethernet_counter_t {
 260     nd_uint32_t    alignerrors;
 261     nd_uint32_t    fcserrors;
 262     nd_uint32_t    single_collision_frames;
 263     nd_uint32_t    multiple_collision_frames;
 264     nd_uint32_t    test_errors;
 265     nd_uint32_t    deferred_transmissions;
 266     nd_uint32_t    late_collisions;
 267     nd_uint32_t    excessive_collisions;
 268     nd_uint32_t    mac_transmit_errors;
 269     nd_uint32_t    carrier_sense_errors;
 270     nd_uint32_t    frame_too_longs;
 271     nd_uint32_t    mac_receive_errors;
 272     nd_uint32_t    symbol_errors;
 273 };
 274
 275 struct sflow_100basevg_counter_t {
 276     nd_uint32_t    in_highpriority_frames;
 277     nd_uint64_t    in_highpriority_octets;
 278     nd_uint32_t    in_normpriority_frames;
 279     nd_uint64_t    in_normpriority_octets;
 280     nd_uint32_t    in_ipmerrors;
 281     nd_uint32_t    in_oversized;
 282     nd_uint32_t    in_data_errors;
 283     nd_uint32_t    in_null_addressed_frames;
 284     nd_uint32_t    out_highpriority_frames;
 285     nd_uint64_t    out_highpriority_octets;
 286     nd_uint32_t    transitioninto_frames;
 287     nd_uint64_t    hc_in_highpriority_octets;
 288     nd_uint64_t    hc_in_normpriority_octets;
 289     nd_uint64_t    hc_out_highpriority_octets;
 290 };
 291
 292 struct sflow_vlan_counter_t {
 293     nd_uint32_t    vlan_id;
 294     nd_uint64_t    octets;
 295     nd_uint32_t    unicast_pkt;
 296     nd_uint32_t    multicast_pkt;
 297     nd_uint32_t    broadcast_pkt;
 298     nd_uint32_t    discards;
 299 };
 300
 301 static int
 302 print_sflow_counter_generic(netdissect_options *ndo,
 303                             const u_char *pointer, u_int len)
 304 {
 305     const struct sflow_generic_counter_t *sflow_gen_counter;
 306
 307     if (len < sizeof(struct sflow_generic_counter_t))
 308         return 1;
 309
 310     sflow_gen_counter = (const struct sflow_generic_counter_t *)pointer;
 311     ND_TCHECK_SIZE(sflow_gen_counter);
 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 trunc:
 347     return 1;
 348 }
 349
 350 static int
 351 print_sflow_counter_ethernet(netdissect_options *ndo,
 352                              const u_char *pointer, u_int len)
 353 {
 354     const struct sflow_ethernet_counter_t *sflow_eth_counter;
 355
 356     if (len < sizeof(struct sflow_ethernet_counter_t))
 357         return 1;
 358
 359     sflow_eth_counter = (const struct sflow_ethernet_counter_t *)pointer;
 360     ND_TCHECK_SIZE(sflow_eth_counter);
 361     ND_PRINT("\n\t      align errors %u, fcs errors %u, single collision %u, multiple collision %u, test error %u",
 362            GET_BE_U_4(sflow_eth_counter->alignerrors),
 363            GET_BE_U_4(sflow_eth_counter->fcserrors),
 364            GET_BE_U_4(sflow_eth_counter->single_collision_frames),
 365            GET_BE_U_4(sflow_eth_counter->multiple_collision_frames),
 366            GET_BE_U_4(sflow_eth_counter->test_errors));
 367     ND_PRINT("\n\t      deferred %u, late collision %u, excessive collision %u, mac trans error %u",
 368            GET_BE_U_4(sflow_eth_counter->deferred_transmissions),
 369            GET_BE_U_4(sflow_eth_counter->late_collisions),
 370            GET_BE_U_4(sflow_eth_counter->excessive_collisions),
 371            GET_BE_U_4(sflow_eth_counter->mac_transmit_errors));
 372     ND_PRINT("\n\t      carrier error %u, frames too long %u, mac receive errors %u, symbol errors %u",
 373            GET_BE_U_4(sflow_eth_counter->carrier_sense_errors),
 374            GET_BE_U_4(sflow_eth_counter->frame_too_longs),
 375            GET_BE_U_4(sflow_eth_counter->mac_receive_errors),
 376            GET_BE_U_4(sflow_eth_counter->symbol_errors));
 377
 378     return 0;
 379
 380 trunc:
 381     return 1;
 382 }
 383
 384 static int
 385 print_sflow_counter_token_ring(netdissect_options *ndo _U_,
 386                                const u_char *pointer _U_, u_int len _U_)
 387 {
 388     return 0;
 389 }
 390
 391 static int
 392 print_sflow_counter_basevg(netdissect_options *ndo,
 393                            const u_char *pointer, u_int len)
 394 {
 395     const struct sflow_100basevg_counter_t *sflow_100basevg_counter;
 396
 397     if (len < sizeof(struct sflow_100basevg_counter_t))
 398         return 1;
 399
 400     sflow_100basevg_counter = (const struct sflow_100basevg_counter_t *)pointer;
 401     ND_TCHECK_SIZE(sflow_100basevg_counter);
 402     ND_PRINT("\n\t      in high prio frames %u, in high prio octets %" PRIu64,
 403            GET_BE_U_4(sflow_100basevg_counter->in_highpriority_frames),
 404            GET_BE_U_8(sflow_100basevg_counter->in_highpriority_octets));
 405     ND_PRINT("\n\t      in norm prio frames %u, in norm prio octets %" PRIu64,
 406            GET_BE_U_4(sflow_100basevg_counter->in_normpriority_frames),
 407            GET_BE_U_8(sflow_100basevg_counter->in_normpriority_octets));
 408     ND_PRINT("\n\t      in ipm errors %u, oversized %u, in data errors %u, null addressed frames %u",
 409            GET_BE_U_4(sflow_100basevg_counter->in_ipmerrors),
 410            GET_BE_U_4(sflow_100basevg_counter->in_oversized),
 411            GET_BE_U_4(sflow_100basevg_counter->in_data_errors),
 412            GET_BE_U_4(sflow_100basevg_counter->in_null_addressed_frames));
 413     ND_PRINT("\n\t      out high prio frames %u, out high prio octets %" PRIu64
 414            ", trans into frames %u",
 415            GET_BE_U_4(sflow_100basevg_counter->out_highpriority_frames),
 416            GET_BE_U_8(sflow_100basevg_counter->out_highpriority_octets),
 417            GET_BE_U_4(sflow_100basevg_counter->transitioninto_frames));
 418     ND_PRINT("\n\t      in hc high prio octets %" PRIu64
 419            ", in hc norm prio octets %" PRIu64
 420            ", out hc high prio octets %" PRIu64,
 421            GET_BE_U_8(sflow_100basevg_counter->hc_in_highpriority_octets),
 422            GET_BE_U_8(sflow_100basevg_counter->hc_in_normpriority_octets),
 423            GET_BE_U_8(sflow_100basevg_counter->hc_out_highpriority_octets));
 424
 425     return 0;
 426
 427 trunc:
 428     return 1;
 429 }
 430
 431 static int
 432 print_sflow_counter_vlan(netdissect_options *ndo,
 433                          const u_char *pointer, u_int len)
 434 {
 435     const struct sflow_vlan_counter_t *sflow_vlan_counter;
 436
 437     if (len < sizeof(struct sflow_vlan_counter_t))
 438         return 1;
 439
 440     sflow_vlan_counter = (const struct sflow_vlan_counter_t *)pointer;
 441     ND_TCHECK_SIZE(sflow_vlan_counter);
 442     ND_PRINT("\n\t      vlan_id %u, octets %" PRIu64
 443            ", unicast_pkt %u, multicast_pkt %u, broadcast_pkt %u, discards %u",
 444            GET_BE_U_4(sflow_vlan_counter->vlan_id),
 445            GET_BE_U_8(sflow_vlan_counter->octets),
 446            GET_BE_U_4(sflow_vlan_counter->unicast_pkt),
 447            GET_BE_U_4(sflow_vlan_counter->multicast_pkt),
 448            GET_BE_U_4(sflow_vlan_counter->broadcast_pkt),
 449            GET_BE_U_4(sflow_vlan_counter->discards));
 450
 451     return 0;
 452
 453 trunc:
 454     return 1;
 455 }
 456
 457 struct sflow_processor_counter_t {
 458     nd_uint32_t five_sec_util;
 459     nd_uint32_t one_min_util;
 460     nd_uint32_t five_min_util;
 461     nd_uint64_t total_memory;
 462     nd_uint64_t free_memory;
 463 };
 464
 465 static int
 466 print_sflow_counter_processor(netdissect_options *ndo,
 467                               const u_char *pointer, u_int len)
 468 {
 469     const struct sflow_processor_counter_t *sflow_processor_counter;
 470
 471     if (len < sizeof(struct sflow_processor_counter_t))
 472         return 1;
 473
 474     sflow_processor_counter = (const struct sflow_processor_counter_t *)pointer;
 475     ND_TCHECK_SIZE(sflow_processor_counter);
 476     ND_PRINT("\n\t      5sec %u, 1min %u, 5min %u, total_mem %" PRIu64
 477            ", total_mem %" PRIu64,
 478            GET_BE_U_4(sflow_processor_counter->five_sec_util),
 479            GET_BE_U_4(sflow_processor_counter->one_min_util),
 480            GET_BE_U_4(sflow_processor_counter->five_min_util),
 481            GET_BE_U_8(sflow_processor_counter->total_memory),
 482            GET_BE_U_8(sflow_processor_counter->free_memory));
 483
 484     return 0;
 485
 486 trunc:
 487     return 1;
 488 }
 489
 490 static int
 491 sflow_print_counter_records(netdissect_options *ndo,
 492                             const u_char *pointer, u_int len, u_int records)
 493 {
 494     u_int nrecords;
 495     const u_char *tptr;
 496     u_int tlen;
 497     u_int counter_type;
 498     u_int counter_len;
 499     u_int enterprise;
 500     const struct sflow_counter_record_t *sflow_counter_record;
 501
 502     nrecords = records;
 503     tptr = pointer;
 504     tlen = len;
 505
 506     while (nrecords > 0) {
 507         /* do we have the "header?" */
 508         if (tlen < sizeof(struct sflow_counter_record_t))
 509             return 1;
 510         sflow_counter_record = (const struct sflow_counter_record_t *)tptr;
 511         ND_TCHECK_SIZE(sflow_counter_record);
 512
 513         enterprise = GET_BE_U_4(sflow_counter_record->format);
 514         counter_type = enterprise & 0x0FFF;
 515         enterprise = enterprise >> 20;
 516         counter_len  = GET_BE_U_4(sflow_counter_record->length);
 517         ND_PRINT("\n\t    enterprise %u, %s (%u) length %u",
 518                enterprise,
 519                (enterprise == 0) ? tok2str(sflow_counter_type_values,"Unknown",counter_type) : "Unknown",
 520                counter_type,
 521                counter_len);
 522
 523         tptr += sizeof(struct sflow_counter_record_t);
 524         tlen -= sizeof(struct sflow_counter_record_t);
 525
 526         if (tlen < counter_len)
 527             return 1;
 528         if (enterprise == 0) {
 529             switch (counter_type) {
 530             case SFLOW_COUNTER_GENERIC:
 531                 if (print_sflow_counter_generic(ndo, tptr, tlen))
 532                     return 1;
 533                 break;
 534             case SFLOW_COUNTER_ETHERNET:
 535                 if (print_sflow_counter_ethernet(ndo, tptr, tlen))
 536                     return 1;
 537                 break;
 538             case SFLOW_COUNTER_TOKEN_RING:
 539                 if (print_sflow_counter_token_ring(ndo, tptr,tlen))
 540                     return 1;
 541                 break;
 542             case SFLOW_COUNTER_BASEVG:
 543                 if (print_sflow_counter_basevg(ndo, tptr, tlen))
 544                     return 1;
 545                 break;
 546             case SFLOW_COUNTER_VLAN:
 547                 if (print_sflow_counter_vlan(ndo, tptr, tlen))
 548                     return 1;
 549                 break;
 550             case SFLOW_COUNTER_PROCESSOR:
 551                 if (print_sflow_counter_processor(ndo, tptr, tlen))
 552                     return 1;
 553                 break;
 554             default:
 555                 if (ndo->ndo_vflag <= 1)
 556                     print_unknown_data(ndo, tptr, "\n\t\t", counter_len);
 557                 break;
 558             }
 559         }
 560         tptr += counter_len;
 561         tlen -= counter_len;
 562         nrecords--;
 563
 564     }
 565
 566     return 0;
 567
 568 trunc:
 569     return 1;
 570 }
 571
 572 static int
 573 sflow_print_counter_sample(netdissect_options *ndo,
 574                            const u_char *pointer, u_int len)
 575 {
 576     const struct sflow_counter_sample_t *sflow_counter_sample;
 577     u_int           nrecords;
 578
 579     if (len < sizeof(struct sflow_counter_sample_t))
 580         return 1;
 581
 582     sflow_counter_sample = (const struct sflow_counter_sample_t *)pointer;
 583     ND_TCHECK_SIZE(sflow_counter_sample);
 584
 585     nrecords   = GET_BE_U_4(sflow_counter_sample->records);
 586
 587     ND_PRINT(" seqnum %u, type %u, idx %u, records %u",
 588            GET_BE_U_4(sflow_counter_sample->seqnum),
 589            GET_U_1(sflow_counter_sample->type),
 590            GET_BE_U_3(sflow_counter_sample->index),
 591            nrecords);
 592
 593     return sflow_print_counter_records(ndo, pointer + sizeof(struct sflow_counter_sample_t),
 594                                        len - sizeof(struct sflow_counter_sample_t),
 595                                        nrecords);
 596
 597 trunc:
 598     return 1;
 599 }
 600
 601 static int
 602 sflow_print_expanded_counter_sample(netdissect_options *ndo,
 603                                     const u_char *pointer, u_int len)
 604 {
 605     const struct sflow_expanded_counter_sample_t *sflow_expanded_counter_sample;
 606     u_int           nrecords;
 607
 608
 609     if (len < sizeof(struct sflow_expanded_counter_sample_t))
 610         return 1;
 611
 612     sflow_expanded_counter_sample = (const struct sflow_expanded_counter_sample_t *)pointer;
 613     ND_TCHECK_SIZE(sflow_expanded_counter_sample);
 614
 615     nrecords = GET_BE_U_4(sflow_expanded_counter_sample->records);
 616
 617     ND_PRINT(" seqnum %u, type %u, idx %u, records %u",
 618            GET_BE_U_4(sflow_expanded_counter_sample->seqnum),
 619            GET_BE_U_4(sflow_expanded_counter_sample->type),
 620            GET_BE_U_4(sflow_expanded_counter_sample->index),
 621            nrecords);
 622
 623     return sflow_print_counter_records(ndo, pointer + sizeof(struct sflow_expanded_counter_sample_t),
 624                                        len - sizeof(struct sflow_expanded_counter_sample_t),
 625                                        nrecords);
 626
 627 trunc:
 628     return 1;
 629 }
 630
 631 static int
 632 print_sflow_raw_packet(netdissect_options *ndo,
 633                        const u_char *pointer, u_int len)
 634 {
 635     const struct sflow_expanded_flow_raw_t *sflow_flow_raw;
 636
 637     if (len < sizeof(struct sflow_expanded_flow_raw_t))
 638         return 1;
 639
 640     sflow_flow_raw = (const struct sflow_expanded_flow_raw_t *)pointer;
 641     ND_TCHECK_SIZE(sflow_flow_raw);
 642     ND_PRINT("\n\t      protocol %s (%u), length %u, stripped bytes %u, header_size %u",
 643            tok2str(sflow_flow_raw_protocol_values,"Unknown",GET_BE_U_4(sflow_flow_raw->protocol)),
 644            GET_BE_U_4(sflow_flow_raw->protocol),
 645            GET_BE_U_4(sflow_flow_raw->length),
 646            GET_BE_U_4(sflow_flow_raw->stripped_bytes),
 647            GET_BE_U_4(sflow_flow_raw->header_size));
 648
 649     /* QUESTION - should we attempt to print the raw header itself?
 650        assuming of course there is wnough data present to do so... */
 651
 652     return 0;
 653
 654 trunc:
 655     return 1;
 656 }
 657
 658 static int
 659 print_sflow_ethernet_frame(netdissect_options *ndo,
 660                            const u_char *pointer, u_int len)
 661 {
 662     const struct sflow_ethernet_frame_t *sflow_ethernet_frame;
 663
 664     if (len < sizeof(struct sflow_ethernet_frame_t))
 665         return 1;
 666
 667     sflow_ethernet_frame = (const struct sflow_ethernet_frame_t *)pointer;
 668     ND_TCHECK_SIZE(sflow_ethernet_frame);
 669
 670     ND_PRINT("\n\t      frame len %u, type %u",
 671            GET_BE_U_4(sflow_ethernet_frame->length),
 672            GET_BE_U_4(sflow_ethernet_frame->type));
 673
 674     return 0;
 675
 676 trunc:
 677     return 1;
 678 }
 679
 680 static int
 681 print_sflow_extended_switch_data(netdissect_options *ndo,
 682                                  const u_char *pointer, u_int len)
 683 {
 684     const struct sflow_extended_switch_data_t *sflow_extended_sw_data;
 685
 686     if (len < sizeof(struct sflow_extended_switch_data_t))
 687         return 1;
 688
 689     sflow_extended_sw_data = (const struct sflow_extended_switch_data_t *)pointer;
 690     ND_TCHECK_SIZE(sflow_extended_sw_data);
 691     ND_PRINT("\n\t      src vlan %u, src pri %u, dst vlan %u, dst pri %u",
 692            GET_BE_U_4(sflow_extended_sw_data->src_vlan),
 693            GET_BE_U_4(sflow_extended_sw_data->src_pri),
 694            GET_BE_U_4(sflow_extended_sw_data->dst_vlan),
 695            GET_BE_U_4(sflow_extended_sw_data->dst_pri));
 696
 697     return 0;
 698
 699 trunc:
 700     return 1;
 701 }
 702
 703 static int
 704 sflow_print_flow_records(netdissect_options *ndo,
 705                          const u_char *pointer, u_int len, u_int records)
 706 {
 707     u_int nrecords;
 708     const u_char *tptr;
 709     u_int tlen;
 710     u_int flow_type;
 711     u_int enterprise;
 712     u_int flow_len;
 713     const struct sflow_flow_record_t *sflow_flow_record;
 714
 715     nrecords = records;
 716     tptr = pointer;
 717     tlen = len;
 718
 719     while (nrecords > 0) {
 720         /* do we have the "header?" */
 721         if (tlen < sizeof(struct sflow_flow_record_t))
 722             return 1;
 723
 724         sflow_flow_record = (const struct sflow_flow_record_t *)tptr;
 725         ND_TCHECK_SIZE(sflow_flow_record);
 726
 727         /* so, the funky encoding means we cannot blythly mask-off
 728            bits, we must also check the enterprise. */
 729
 730         enterprise = GET_BE_U_4(sflow_flow_record->format);
 731         flow_type = enterprise & 0x0FFF;
 732         enterprise = enterprise >> 12;
 733         flow_len  = GET_BE_U_4(sflow_flow_record->length);
 734         ND_PRINT("\n\t    enterprise %u %s (%u) length %u",
 735                enterprise,
 736                (enterprise == 0) ? tok2str(sflow_flow_type_values,"Unknown",flow_type) : "Unknown",
 737                flow_type,
 738                flow_len);
 739
 740         tptr += sizeof(struct sflow_flow_record_t);
 741         tlen -= sizeof(struct sflow_flow_record_t);
 742
 743         if (tlen < flow_len)
 744             return 1;
 745
 746         if (enterprise == 0) {
 747             switch (flow_type) {
 748             case SFLOW_FLOW_RAW_PACKET:
 749                 if (print_sflow_raw_packet(ndo, tptr, tlen))
 750                     return 1;
 751                 break;
 752             case SFLOW_FLOW_EXTENDED_SWITCH_DATA:
 753                 if (print_sflow_extended_switch_data(ndo, tptr, tlen))
 754                     return 1;
 755                 break;
 756             case SFLOW_FLOW_ETHERNET_FRAME:
 757                 if (print_sflow_ethernet_frame(ndo, tptr, tlen))
 758                     return 1;
 759                 break;
 760                 /* FIXME these need a decoder */
 761             case SFLOW_FLOW_IPV4_DATA:
 762             case SFLOW_FLOW_IPV6_DATA:
 763             case SFLOW_FLOW_EXTENDED_ROUTER_DATA:
 764             case SFLOW_FLOW_EXTENDED_GATEWAY_DATA:
 765             case SFLOW_FLOW_EXTENDED_USER_DATA:
 766             case SFLOW_FLOW_EXTENDED_URL_DATA:
 767             case SFLOW_FLOW_EXTENDED_MPLS_DATA:
 768             case SFLOW_FLOW_EXTENDED_NAT_DATA:
 769             case SFLOW_FLOW_EXTENDED_MPLS_TUNNEL:
 770             case SFLOW_FLOW_EXTENDED_MPLS_VC:
 771             case SFLOW_FLOW_EXTENDED_MPLS_FEC:
 772             case SFLOW_FLOW_EXTENDED_MPLS_LVP_FEC:
 773             case SFLOW_FLOW_EXTENDED_VLAN_TUNNEL:
 774                 break;
 775             default:
 776                 if (ndo->ndo_vflag <= 1)
 777                     print_unknown_data(ndo, tptr, "\n\t\t", flow_len);
 778                 break;
 779             }
 780         }
 781         tptr += flow_len;
 782         tlen -= flow_len;
 783         nrecords--;
 784
 785     }
 786
 787     return 0;
 788
 789 trunc:
 790     return 1;
 791 }
 792
 793 static int
 794 sflow_print_flow_sample(netdissect_options *ndo,
 795                         const u_char *pointer, u_int len)
 796 {
 797     const struct sflow_flow_sample_t *sflow_flow_sample;
 798     u_int          nrecords;
 799
 800     if (len < sizeof(struct sflow_flow_sample_t))
 801         return 1;
 802
 803     sflow_flow_sample = (const struct sflow_flow_sample_t *)pointer;
 804     ND_TCHECK_SIZE(sflow_flow_sample);
 805
 806     nrecords = GET_BE_U_4(sflow_flow_sample->records);
 807
 808     ND_PRINT(" seqnum %u, type %u, idx %u, rate %u, pool %u, drops %u, input %u output %u records %u",
 809            GET_BE_U_4(sflow_flow_sample->seqnum),
 810            GET_U_1(sflow_flow_sample->type),
 811            GET_BE_U_3(sflow_flow_sample->index),
 812            GET_BE_U_4(sflow_flow_sample->rate),
 813            GET_BE_U_4(sflow_flow_sample->pool),
 814            GET_BE_U_4(sflow_flow_sample->drops),
 815            GET_BE_U_4(sflow_flow_sample->in_interface),
 816            GET_BE_U_4(sflow_flow_sample->out_interface),
 817            nrecords);
 818
 819     return sflow_print_flow_records(ndo, pointer + sizeof(struct sflow_flow_sample_t),
 820                                     len - sizeof(struct sflow_flow_sample_t),
 821                                     nrecords);
 822
 823 trunc:
 824     return 1;
 825 }
 826
 827 static int
 828 sflow_print_expanded_flow_sample(netdissect_options *ndo,
 829                                  const u_char *pointer, u_int len)
 830 {
 831     const struct sflow_expanded_flow_sample_t *sflow_expanded_flow_sample;
 832     u_int nrecords;
 833
 834     if (len < sizeof(struct sflow_expanded_flow_sample_t))
 835         return 1;
 836
 837     sflow_expanded_flow_sample = (const struct sflow_expanded_flow_sample_t *)pointer;
 838     ND_TCHECK_SIZE(sflow_expanded_flow_sample);
 839
 840     nrecords = GET_BE_U_4(sflow_expanded_flow_sample->records);
 841
 842     ND_PRINT(" seqnum %u, type %u, idx %u, rate %u, pool %u, drops %u, records %u",
 843            GET_BE_U_4(sflow_expanded_flow_sample->seqnum),
 844            GET_BE_U_4(sflow_expanded_flow_sample->type),
 845            GET_BE_U_4(sflow_expanded_flow_sample->index),
 846            GET_BE_U_4(sflow_expanded_flow_sample->rate),
 847            GET_BE_U_4(sflow_expanded_flow_sample->pool),
 848            GET_BE_U_4(sflow_expanded_flow_sample->drops),
 849            GET_BE_U_4(sflow_expanded_flow_sample->records));
 850
 851     return sflow_print_flow_records(ndo, pointer + sizeof(struct sflow_expanded_flow_sample_t),
 852                                     len - sizeof(struct sflow_expanded_flow_sample_t),
 853                                     nrecords);
 854
 855 trunc:
 856     return 1;
 857 }
 858
 859 void
 860 sflow_print(netdissect_options *ndo,
 861             const u_char *pptr, u_int len)
 862 {
 863     const struct sflow_datagram_t *sflow_datagram;
 864     const struct sflow_sample_header *sflow_sample;
 865
 866     const u_char *tptr;
 867     u_int tlen;
 868     uint32_t sflow_sample_type, sflow_sample_len;
 869     uint32_t nsamples;
 870
 871     ndo->ndo_protocol = "sflow";
 872     tptr = pptr;
 873     tlen = len;
 874     sflow_datagram = (const struct sflow_datagram_t *)pptr;
 875     if (len < sizeof(struct sflow_datagram_t)) {
 876         ND_PRINT("sFlowv%u", GET_BE_U_4(sflow_datagram->version));
 877         ND_PRINT(" [length %u < %zu]", len, sizeof(struct sflow_datagram_t));
 878         nd_print_invalid(ndo);
 879         return;
 880     }
 881     ND_TCHECK_SIZE(sflow_datagram);
 882
 883     /*
 884      * Sanity checking of the header.
 885      */
 886     if (GET_BE_U_4(sflow_datagram->version) != 5) {
 887         ND_PRINT("sFlow version %u packet not supported",
 888                GET_BE_U_4(sflow_datagram->version));
 889         return;
 890     }
 891
 892     if (ndo->ndo_vflag < 1) {
 893         ND_PRINT("sFlowv%u, %s agent %s, agent-id %u, length %u",
 894                GET_BE_U_4(sflow_datagram->version),
 895                GET_BE_U_4(sflow_datagram->ip_version) == 1 ? "IPv4" : "IPv6",
 896                GET_IPADDR_STRING(sflow_datagram->agent),
 897                GET_BE_U_4(sflow_datagram->agent_id),
 898                len);
 899         return;
 900     }
 901
 902     /* ok they seem to want to know everything - lets fully decode it */
 903     nsamples=GET_BE_U_4(sflow_datagram->samples);
 904     ND_PRINT("sFlowv%u, %s agent %s, agent-id %u, seqnum %u, uptime %u, samples %u, length %u",
 905            GET_BE_U_4(sflow_datagram->version),
 906            GET_BE_U_4(sflow_datagram->ip_version) == 1 ? "IPv4" : "IPv6",
 907            GET_IPADDR_STRING(sflow_datagram->agent),
 908            GET_BE_U_4(sflow_datagram->agent_id),
 909            GET_BE_U_4(sflow_datagram->seqnum),
 910            GET_BE_U_4(sflow_datagram->uptime),
 911            nsamples,
 912            len);
 913
 914     /* skip Common header */
 915     tptr += sizeof(struct sflow_datagram_t);
 916     tlen -= sizeof(struct sflow_datagram_t);
 917
 918     while (nsamples > 0 && tlen > 0) {
 919         sflow_sample = (const struct sflow_sample_header *)tptr;
 920         ND_TCHECK_SIZE(sflow_sample);
 921
 922         sflow_sample_type = (GET_BE_U_4(sflow_sample->format)&0x0FFF);
 923         sflow_sample_len = GET_BE_U_4(sflow_sample->len);
 924
 925         if (tlen < sizeof(struct sflow_sample_header))
 926             goto trunc;
 927
 928         tptr += sizeof(struct sflow_sample_header);
 929         tlen -= sizeof(struct sflow_sample_header);
 930
 931         ND_PRINT("\n\t%s (%u), length %u,",
 932                tok2str(sflow_format_values, "Unknown", sflow_sample_type),
 933                sflow_sample_type,
 934                sflow_sample_len);
 935
 936         /* basic sanity check */
 937         if (sflow_sample_type == 0 || sflow_sample_len ==0) {
 938             return;
 939         }
 940
 941         if (tlen < sflow_sample_len)
 942             goto trunc;
 943
 944         /* did we capture enough for fully decoding the sample ? */
 945         ND_TCHECK_LEN(tptr, sflow_sample_len);
 946
 947         switch(sflow_sample_type) {
 948         case SFLOW_FLOW_SAMPLE:
 949             if (sflow_print_flow_sample(ndo, tptr, tlen))
 950                 goto trunc;
 951             break;
 952
 953         case SFLOW_COUNTER_SAMPLE:
 954             if (sflow_print_counter_sample(ndo, tptr,tlen))
 955                 goto trunc;
 956             break;
 957
 958         case SFLOW_EXPANDED_FLOW_SAMPLE:
 959             if (sflow_print_expanded_flow_sample(ndo, tptr, tlen))
 960                 goto trunc;
 961             break;
 962
 963         case SFLOW_EXPANDED_COUNTER_SAMPLE:
 964             if (sflow_print_expanded_counter_sample(ndo, tptr,tlen))
 965                 goto trunc;
 966             break;
 967
 968         default:
 969             if (ndo->ndo_vflag <= 1)
 970                 print_unknown_data(ndo, tptr, "\n\t    ", sflow_sample_len);
 971             break;
 972         }
 973         tptr += sflow_sample_len;
 974         tlen -= sflow_sample_len;
 975         nsamples--;
 976     }
 977     return;
 978
 979  trunc:
 980     nd_print_trunc(ndo);
 981 }