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Diffstat (limited to 'print-sflow.c')
| -rw-r--r-- | print-sflow.c | 962 |
1 files changed, 962 insertions, 0 deletions
diff --git a/print-sflow.c b/print-sflow.c new file mode 100644 index 0000000..f508ccc --- /dev/null +++ b/print-sflow.c @@ -0,0 +1,962 @@ +/* + * Copyright (c) 1998-2007 The TCPDUMP project + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that: (1) source code + * distributions retain the above copyright notice and this paragraph + * in its entirety, and (2) distributions including binary code include + * the above copyright notice and this paragraph in its entirety in + * the documentation or other materials provided with the distribution. + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND + * WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT + * LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE. + * + * Original code by Carles Kishimoto <carles.kishimoto@gmail.com> + * + * Expansion and refactoring by Rick Jones <rick.jones2@hp.com> + */ + +/* \summary: sFlow protocol printer */ + +/* specification: https://sflow.org/developers/specifications.php */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include "netdissect-stdinc.h" + +#define ND_LONGJMP_FROM_TCHECK +#include "netdissect.h" +#include "extract.h" +#include "addrtoname.h" + +/* + * sFlow datagram + * + * 0 1 2 3 + * 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 + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * | Sflow version (2,4,5) | + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * | IP version (1 for IPv4 | 2 for IPv6) | + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * | IP Address AGENT (4 or 16 bytes) | + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * | Sub agent ID | + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * | Datagram sequence number | + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * | Switch uptime in ms | + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * | num samples in datagram | + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * + */ + +struct sflow_datagram_t { + nd_uint32_t version; + nd_uint32_t ip_version; + nd_ipv4 agent; + nd_uint32_t agent_id; + nd_uint32_t seqnum; + nd_uint32_t uptime; + nd_uint32_t samples; +}; + +struct sflow_v6_datagram_t { + nd_uint32_t version; + nd_uint32_t ip_version; + nd_ipv6 agent; + nd_uint32_t agent_id; + nd_uint32_t seqnum; + nd_uint32_t uptime; + nd_uint32_t samples; +}; + +struct sflow_sample_header { + nd_uint32_t format; + nd_uint32_t len; +}; + +#define SFLOW_FLOW_SAMPLE 1 +#define SFLOW_COUNTER_SAMPLE 2 +#define SFLOW_EXPANDED_FLOW_SAMPLE 3 +#define SFLOW_EXPANDED_COUNTER_SAMPLE 4 + +static const struct tok sflow_format_values[] = { + { SFLOW_FLOW_SAMPLE, "flow sample" }, + { SFLOW_COUNTER_SAMPLE, "counter sample" }, + { SFLOW_EXPANDED_FLOW_SAMPLE, "expanded flow sample" }, + { SFLOW_EXPANDED_COUNTER_SAMPLE, "expanded counter sample" }, + { 0, NULL} +}; + +struct sflow_flow_sample_t { + nd_uint32_t seqnum; + nd_uint8_t type; + nd_uint24_t index; + nd_uint32_t rate; + nd_uint32_t pool; + nd_uint32_t drops; + nd_uint32_t in_interface; + nd_uint32_t out_interface; + nd_uint32_t records; + +}; + +struct sflow_expanded_flow_sample_t { + nd_uint32_t seqnum; + nd_uint32_t type; + nd_uint32_t index; + nd_uint32_t rate; + nd_uint32_t pool; + nd_uint32_t drops; + nd_uint32_t in_interface_format; + nd_uint32_t in_interface_value; + nd_uint32_t out_interface_format; + nd_uint32_t out_interface_value; + nd_uint32_t records; +}; + +#define SFLOW_FLOW_RAW_PACKET 1 +#define SFLOW_FLOW_ETHERNET_FRAME 2 +#define SFLOW_FLOW_IPV4_DATA 3 +#define SFLOW_FLOW_IPV6_DATA 4 +#define SFLOW_FLOW_EXTENDED_SWITCH_DATA 1001 +#define SFLOW_FLOW_EXTENDED_ROUTER_DATA 1002 +#define SFLOW_FLOW_EXTENDED_GATEWAY_DATA 1003 +#define SFLOW_FLOW_EXTENDED_USER_DATA 1004 +#define SFLOW_FLOW_EXTENDED_URL_DATA 1005 +#define SFLOW_FLOW_EXTENDED_MPLS_DATA 1006 +#define SFLOW_FLOW_EXTENDED_NAT_DATA 1007 +#define SFLOW_FLOW_EXTENDED_MPLS_TUNNEL 1008 +#define SFLOW_FLOW_EXTENDED_MPLS_VC 1009 +#define SFLOW_FLOW_EXTENDED_MPLS_FEC 1010 +#define SFLOW_FLOW_EXTENDED_MPLS_LVP_FEC 1011 +#define SFLOW_FLOW_EXTENDED_VLAN_TUNNEL 1012 + +static const struct tok sflow_flow_type_values[] = { + { SFLOW_FLOW_RAW_PACKET, "Raw packet"}, + { SFLOW_FLOW_ETHERNET_FRAME, "Ethernet frame"}, + { SFLOW_FLOW_IPV4_DATA, "IPv4 Data"}, + { SFLOW_FLOW_IPV6_DATA, "IPv6 Data"}, + { SFLOW_FLOW_EXTENDED_SWITCH_DATA, "Extended Switch data"}, + { SFLOW_FLOW_EXTENDED_ROUTER_DATA, "Extended Router data"}, + { SFLOW_FLOW_EXTENDED_GATEWAY_DATA, "Extended Gateway data"}, + { SFLOW_FLOW_EXTENDED_USER_DATA, "Extended User data"}, + { SFLOW_FLOW_EXTENDED_URL_DATA, "Extended URL data"}, + { SFLOW_FLOW_EXTENDED_MPLS_DATA, "Extended MPLS data"}, + { SFLOW_FLOW_EXTENDED_NAT_DATA, "Extended NAT data"}, + { SFLOW_FLOW_EXTENDED_MPLS_TUNNEL, "Extended MPLS tunnel"}, + { SFLOW_FLOW_EXTENDED_MPLS_VC, "Extended MPLS VC"}, + { SFLOW_FLOW_EXTENDED_MPLS_FEC, "Extended MPLS FEC"}, + { SFLOW_FLOW_EXTENDED_MPLS_LVP_FEC, "Extended MPLS LVP FEC"}, + { SFLOW_FLOW_EXTENDED_VLAN_TUNNEL, "Extended VLAN Tunnel"}, + { 0, NULL} +}; + +#define SFLOW_HEADER_PROTOCOL_ETHERNET 1 +#define SFLOW_HEADER_PROTOCOL_IPV4 11 +#define SFLOW_HEADER_PROTOCOL_IPV6 12 + +static const struct tok sflow_flow_raw_protocol_values[] = { + { SFLOW_HEADER_PROTOCOL_ETHERNET, "Ethernet"}, + { SFLOW_HEADER_PROTOCOL_IPV4, "IPv4"}, + { SFLOW_HEADER_PROTOCOL_IPV6, "IPv6"}, + { 0, NULL} +}; + +struct sflow_expanded_flow_raw_t { + nd_uint32_t protocol; + nd_uint32_t length; + nd_uint32_t stripped_bytes; + nd_uint32_t header_size; +}; + +struct sflow_ethernet_frame_t { + nd_uint32_t length; + nd_byte src_mac[8]; + nd_byte dst_mac[8]; + nd_uint32_t type; +}; + +struct sflow_extended_switch_data_t { + nd_uint32_t src_vlan; + nd_uint32_t src_pri; + nd_uint32_t dst_vlan; + nd_uint32_t dst_pri; +}; + +struct sflow_counter_record_t { + nd_uint32_t format; + nd_uint32_t length; +}; + +struct sflow_flow_record_t { + nd_uint32_t format; + nd_uint32_t length; +}; + +struct sflow_counter_sample_t { + nd_uint32_t seqnum; + nd_uint8_t type; + nd_uint24_t index; + nd_uint32_t records; +}; + +struct sflow_expanded_counter_sample_t { + nd_uint32_t seqnum; + nd_uint32_t type; + nd_uint32_t index; + nd_uint32_t records; +}; + +#define SFLOW_COUNTER_GENERIC 1 +#define SFLOW_COUNTER_ETHERNET 2 +#define SFLOW_COUNTER_TOKEN_RING 3 +#define SFLOW_COUNTER_BASEVG 4 +#define SFLOW_COUNTER_VLAN 5 +#define SFLOW_COUNTER_PROCESSOR 1001 + +static const struct tok sflow_counter_type_values[] = { + { SFLOW_COUNTER_GENERIC, "Generic counter"}, + { SFLOW_COUNTER_ETHERNET, "Ethernet counter"}, + { SFLOW_COUNTER_TOKEN_RING, "Token ring counter"}, + { SFLOW_COUNTER_BASEVG, "100 BaseVG counter"}, + { SFLOW_COUNTER_VLAN, "Vlan counter"}, + { SFLOW_COUNTER_PROCESSOR, "Processor counter"}, + { 0, NULL} +}; + +#define SFLOW_IFACE_DIRECTION_UNKNOWN 0 +#define SFLOW_IFACE_DIRECTION_FULLDUPLEX 1 +#define SFLOW_IFACE_DIRECTION_HALFDUPLEX 2 +#define SFLOW_IFACE_DIRECTION_IN 3 +#define SFLOW_IFACE_DIRECTION_OUT 4 + +static const struct tok sflow_iface_direction_values[] = { + { SFLOW_IFACE_DIRECTION_UNKNOWN, "unknown"}, + { SFLOW_IFACE_DIRECTION_FULLDUPLEX, "full-duplex"}, + { SFLOW_IFACE_DIRECTION_HALFDUPLEX, "half-duplex"}, + { SFLOW_IFACE_DIRECTION_IN, "in"}, + { SFLOW_IFACE_DIRECTION_OUT, "out"}, + { 0, NULL} +}; + +struct sflow_generic_counter_t { + nd_uint32_t ifindex; + nd_uint32_t iftype; + nd_uint64_t ifspeed; + nd_uint32_t ifdirection; + nd_uint32_t ifstatus; + nd_uint64_t ifinoctets; + nd_uint32_t ifinunicastpkts; + nd_uint32_t ifinmulticastpkts; + nd_uint32_t ifinbroadcastpkts; + nd_uint32_t ifindiscards; + nd_uint32_t ifinerrors; + nd_uint32_t ifinunkownprotos; + nd_uint64_t ifoutoctets; + nd_uint32_t ifoutunicastpkts; + nd_uint32_t ifoutmulticastpkts; + nd_uint32_t ifoutbroadcastpkts; + nd_uint32_t ifoutdiscards; + nd_uint32_t ifouterrors; + nd_uint32_t ifpromiscmode; +}; + +struct sflow_ethernet_counter_t { + nd_uint32_t alignerrors; + nd_uint32_t fcserrors; + nd_uint32_t single_collision_frames; + nd_uint32_t multiple_collision_frames; + nd_uint32_t test_errors; + nd_uint32_t deferred_transmissions; + nd_uint32_t late_collisions; + nd_uint32_t excessive_collisions; + nd_uint32_t mac_transmit_errors; + nd_uint32_t carrier_sense_errors; + nd_uint32_t frame_too_longs; + nd_uint32_t mac_receive_errors; + nd_uint32_t symbol_errors; +}; + +struct sflow_100basevg_counter_t { + nd_uint32_t in_highpriority_frames; + nd_uint64_t in_highpriority_octets; + nd_uint32_t in_normpriority_frames; + nd_uint64_t in_normpriority_octets; + nd_uint32_t in_ipmerrors; + nd_uint32_t in_oversized; + nd_uint32_t in_data_errors; + nd_uint32_t in_null_addressed_frames; + nd_uint32_t out_highpriority_frames; + nd_uint64_t out_highpriority_octets; + nd_uint32_t transitioninto_frames; + nd_uint64_t hc_in_highpriority_octets; + nd_uint64_t hc_in_normpriority_octets; + nd_uint64_t hc_out_highpriority_octets; +}; + +struct sflow_vlan_counter_t { + nd_uint32_t vlan_id; + nd_uint64_t octets; + nd_uint32_t unicast_pkt; + nd_uint32_t multicast_pkt; + nd_uint32_t broadcast_pkt; + nd_uint32_t discards; +}; + +static int +print_sflow_counter_generic(netdissect_options *ndo, + const u_char *pointer, u_int len) +{ + const struct sflow_generic_counter_t *sflow_gen_counter; + + if (len < sizeof(struct sflow_generic_counter_t)) + return 1; + + sflow_gen_counter = (const struct sflow_generic_counter_t *)pointer; + ND_PRINT("\n\t ifindex %u, iftype %u, ifspeed %" PRIu64 ", ifdirection %u (%s)", + GET_BE_U_4(sflow_gen_counter->ifindex), + GET_BE_U_4(sflow_gen_counter->iftype), + GET_BE_U_8(sflow_gen_counter->ifspeed), + GET_BE_U_4(sflow_gen_counter->ifdirection), + tok2str(sflow_iface_direction_values, "Unknown", + GET_BE_U_4(sflow_gen_counter->ifdirection))); + ND_PRINT("\n\t ifstatus %u, adminstatus: %s, operstatus: %s", + GET_BE_U_4(sflow_gen_counter->ifstatus), + GET_BE_U_4(sflow_gen_counter->ifstatus)&1 ? "up" : "down", + (GET_BE_U_4(sflow_gen_counter->ifstatus)>>1)&1 ? "up" : "down"); + ND_PRINT("\n\t In octets %" PRIu64 + ", unicast pkts %u, multicast pkts %u, broadcast pkts %u, discards %u", + GET_BE_U_8(sflow_gen_counter->ifinoctets), + GET_BE_U_4(sflow_gen_counter->ifinunicastpkts), + GET_BE_U_4(sflow_gen_counter->ifinmulticastpkts), + GET_BE_U_4(sflow_gen_counter->ifinbroadcastpkts), + GET_BE_U_4(sflow_gen_counter->ifindiscards)); + ND_PRINT("\n\t In errors %u, unknown protos %u", + GET_BE_U_4(sflow_gen_counter->ifinerrors), + GET_BE_U_4(sflow_gen_counter->ifinunkownprotos)); + ND_PRINT("\n\t Out octets %" PRIu64 + ", unicast pkts %u, multicast pkts %u, broadcast pkts %u, discards %u", + GET_BE_U_8(sflow_gen_counter->ifoutoctets), + GET_BE_U_4(sflow_gen_counter->ifoutunicastpkts), + GET_BE_U_4(sflow_gen_counter->ifoutmulticastpkts), + GET_BE_U_4(sflow_gen_counter->ifoutbroadcastpkts), + GET_BE_U_4(sflow_gen_counter->ifoutdiscards)); + ND_PRINT("\n\t Out errors %u, promisc mode %u", + GET_BE_U_4(sflow_gen_counter->ifouterrors), + GET_BE_U_4(sflow_gen_counter->ifpromiscmode)); + + return 0; +} + +static int +print_sflow_counter_ethernet(netdissect_options *ndo, + const u_char *pointer, u_int len) +{ + const struct sflow_ethernet_counter_t *sflow_eth_counter; + + if (len < sizeof(struct sflow_ethernet_counter_t)) + return 1; + + sflow_eth_counter = (const struct sflow_ethernet_counter_t *)pointer; + ND_PRINT("\n\t align errors %u, fcs errors %u, single collision %u, multiple collision %u, test error %u", + GET_BE_U_4(sflow_eth_counter->alignerrors), + GET_BE_U_4(sflow_eth_counter->fcserrors), + GET_BE_U_4(sflow_eth_counter->single_collision_frames), + GET_BE_U_4(sflow_eth_counter->multiple_collision_frames), + GET_BE_U_4(sflow_eth_counter->test_errors)); + ND_PRINT("\n\t deferred %u, late collision %u, excessive collision %u, mac trans error %u", + GET_BE_U_4(sflow_eth_counter->deferred_transmissions), + GET_BE_U_4(sflow_eth_counter->late_collisions), + GET_BE_U_4(sflow_eth_counter->excessive_collisions), + GET_BE_U_4(sflow_eth_counter->mac_transmit_errors)); + ND_PRINT("\n\t carrier error %u, frames too long %u, mac receive errors %u, symbol errors %u", + GET_BE_U_4(sflow_eth_counter->carrier_sense_errors), + GET_BE_U_4(sflow_eth_counter->frame_too_longs), + GET_BE_U_4(sflow_eth_counter->mac_receive_errors), + GET_BE_U_4(sflow_eth_counter->symbol_errors)); + + return 0; +} + +static int +print_sflow_counter_token_ring(netdissect_options *ndo _U_, + const u_char *pointer _U_, u_int len _U_) +{ + return 0; +} + +static int +print_sflow_counter_basevg(netdissect_options *ndo, + const u_char *pointer, u_int len) +{ + const struct sflow_100basevg_counter_t *sflow_100basevg_counter; + + if (len < sizeof(struct sflow_100basevg_counter_t)) + return 1; + + sflow_100basevg_counter = (const struct sflow_100basevg_counter_t *)pointer; + ND_PRINT("\n\t in high prio frames %u, in high prio octets %" PRIu64, + GET_BE_U_4(sflow_100basevg_counter->in_highpriority_frames), + GET_BE_U_8(sflow_100basevg_counter->in_highpriority_octets)); + ND_PRINT("\n\t in norm prio frames %u, in norm prio octets %" PRIu64, + GET_BE_U_4(sflow_100basevg_counter->in_normpriority_frames), + GET_BE_U_8(sflow_100basevg_counter->in_normpriority_octets)); + ND_PRINT("\n\t in ipm errors %u, oversized %u, in data errors %u, null addressed frames %u", + GET_BE_U_4(sflow_100basevg_counter->in_ipmerrors), + GET_BE_U_4(sflow_100basevg_counter->in_oversized), + GET_BE_U_4(sflow_100basevg_counter->in_data_errors), + GET_BE_U_4(sflow_100basevg_counter->in_null_addressed_frames)); + ND_PRINT("\n\t out high prio frames %u, out high prio octets %" PRIu64 + ", trans into frames %u", + GET_BE_U_4(sflow_100basevg_counter->out_highpriority_frames), + GET_BE_U_8(sflow_100basevg_counter->out_highpriority_octets), + GET_BE_U_4(sflow_100basevg_counter->transitioninto_frames)); + ND_PRINT("\n\t in hc high prio octets %" PRIu64 + ", in hc norm prio octets %" PRIu64 + ", out hc high prio octets %" PRIu64, + GET_BE_U_8(sflow_100basevg_counter->hc_in_highpriority_octets), + GET_BE_U_8(sflow_100basevg_counter->hc_in_normpriority_octets), + GET_BE_U_8(sflow_100basevg_counter->hc_out_highpriority_octets)); + + return 0; +} + +static int +print_sflow_counter_vlan(netdissect_options *ndo, + const u_char *pointer, u_int len) +{ + const struct sflow_vlan_counter_t *sflow_vlan_counter; + + if (len < sizeof(struct sflow_vlan_counter_t)) + return 1; + + sflow_vlan_counter = (const struct sflow_vlan_counter_t *)pointer; + ND_PRINT("\n\t vlan_id %u, octets %" PRIu64 + ", unicast_pkt %u, multicast_pkt %u, broadcast_pkt %u, discards %u", + GET_BE_U_4(sflow_vlan_counter->vlan_id), + GET_BE_U_8(sflow_vlan_counter->octets), + GET_BE_U_4(sflow_vlan_counter->unicast_pkt), + GET_BE_U_4(sflow_vlan_counter->multicast_pkt), + GET_BE_U_4(sflow_vlan_counter->broadcast_pkt), + GET_BE_U_4(sflow_vlan_counter->discards)); + + return 0; +} + +struct sflow_processor_counter_t { + nd_uint32_t five_sec_util; + nd_uint32_t one_min_util; + nd_uint32_t five_min_util; + nd_uint64_t total_memory; + nd_uint64_t free_memory; +}; + +static int +print_sflow_counter_processor(netdissect_options *ndo, + const u_char *pointer, u_int len) +{ + const struct sflow_processor_counter_t *sflow_processor_counter; + + if (len < sizeof(struct sflow_processor_counter_t)) + return 1; + + sflow_processor_counter = (const struct sflow_processor_counter_t *)pointer; + ND_PRINT("\n\t 5sec %u, 1min %u, 5min %u, total_mem %" PRIu64 + ", total_mem %" PRIu64, + GET_BE_U_4(sflow_processor_counter->five_sec_util), + GET_BE_U_4(sflow_processor_counter->one_min_util), + GET_BE_U_4(sflow_processor_counter->five_min_util), + GET_BE_U_8(sflow_processor_counter->total_memory), + GET_BE_U_8(sflow_processor_counter->free_memory)); + + return 0; +} + +static int +sflow_print_counter_records(netdissect_options *ndo, + const u_char *pointer, u_int len, u_int records) +{ + u_int nrecords; + const u_char *tptr; + u_int tlen; + u_int counter_type; + u_int counter_len; + u_int enterprise; + const struct sflow_counter_record_t *sflow_counter_record; + + nrecords = records; + tptr = pointer; + tlen = len; + + while (nrecords > 0) { + /* do we have the "header?" */ + if (tlen < sizeof(struct sflow_counter_record_t)) + return 1; + sflow_counter_record = (const struct sflow_counter_record_t *)tptr; + + enterprise = GET_BE_U_4(sflow_counter_record->format); + counter_type = enterprise & 0x0FFF; + enterprise = enterprise >> 20; + counter_len = GET_BE_U_4(sflow_counter_record->length); + ND_PRINT("\n\t enterprise %u, %s (%u) length %u", + enterprise, + (enterprise == 0) ? tok2str(sflow_counter_type_values,"Unknown",counter_type) : "Unknown", + counter_type, + counter_len); + + tptr += sizeof(struct sflow_counter_record_t); + tlen -= sizeof(struct sflow_counter_record_t); + + if (tlen < counter_len) + return 1; + if (enterprise == 0) { + switch (counter_type) { + case SFLOW_COUNTER_GENERIC: + if (print_sflow_counter_generic(ndo, tptr, tlen)) + return 1; + break; + case SFLOW_COUNTER_ETHERNET: + if (print_sflow_counter_ethernet(ndo, tptr, tlen)) + return 1; + break; + case SFLOW_COUNTER_TOKEN_RING: + if (print_sflow_counter_token_ring(ndo, tptr,tlen)) + return 1; + break; + case SFLOW_COUNTER_BASEVG: + if (print_sflow_counter_basevg(ndo, tptr, tlen)) + return 1; + break; + case SFLOW_COUNTER_VLAN: + if (print_sflow_counter_vlan(ndo, tptr, tlen)) + return 1; + break; + case SFLOW_COUNTER_PROCESSOR: + if (print_sflow_counter_processor(ndo, tptr, tlen)) + return 1; + break; + default: + if (ndo->ndo_vflag <= 1) + print_unknown_data(ndo, tptr, "\n\t\t", counter_len); + break; + } + } + tptr += counter_len; + tlen -= counter_len; + nrecords--; + + } + + return 0; +} + +static int +sflow_print_counter_sample(netdissect_options *ndo, + const u_char *pointer, u_int len) +{ + const struct sflow_counter_sample_t *sflow_counter_sample; + u_int nrecords; + + if (len < sizeof(struct sflow_counter_sample_t)) + return 1; + + sflow_counter_sample = (const struct sflow_counter_sample_t *)pointer; + + nrecords = GET_BE_U_4(sflow_counter_sample->records); + + ND_PRINT(" seqnum %u, type %u, idx %u, records %u", + GET_BE_U_4(sflow_counter_sample->seqnum), + GET_U_1(sflow_counter_sample->type), + GET_BE_U_3(sflow_counter_sample->index), + nrecords); + + return sflow_print_counter_records(ndo, pointer + sizeof(struct sflow_counter_sample_t), + len - sizeof(struct sflow_counter_sample_t), + nrecords); +} + +static int +sflow_print_expanded_counter_sample(netdissect_options *ndo, + const u_char *pointer, u_int len) +{ + const struct sflow_expanded_counter_sample_t *sflow_expanded_counter_sample; + u_int nrecords; + + + if (len < sizeof(struct sflow_expanded_counter_sample_t)) + return 1; + + sflow_expanded_counter_sample = (const struct sflow_expanded_counter_sample_t *)pointer; + + nrecords = GET_BE_U_4(sflow_expanded_counter_sample->records); + + ND_PRINT(" seqnum %u, type %u, idx %u, records %u", + GET_BE_U_4(sflow_expanded_counter_sample->seqnum), + GET_BE_U_4(sflow_expanded_counter_sample->type), + GET_BE_U_4(sflow_expanded_counter_sample->index), + nrecords); + + return sflow_print_counter_records(ndo, pointer + sizeof(struct sflow_expanded_counter_sample_t), + len - sizeof(struct sflow_expanded_counter_sample_t), + nrecords); +} + +static int +print_sflow_raw_packet(netdissect_options *ndo, + const u_char *pointer, u_int len) +{ + const struct sflow_expanded_flow_raw_t *sflow_flow_raw; + + if (len < sizeof(struct sflow_expanded_flow_raw_t)) + return 1; + + sflow_flow_raw = (const struct sflow_expanded_flow_raw_t *)pointer; + ND_PRINT("\n\t protocol %s (%u), length %u, stripped bytes %u, header_size %u", + tok2str(sflow_flow_raw_protocol_values,"Unknown",GET_BE_U_4(sflow_flow_raw->protocol)), + GET_BE_U_4(sflow_flow_raw->protocol), + GET_BE_U_4(sflow_flow_raw->length), + GET_BE_U_4(sflow_flow_raw->stripped_bytes), + GET_BE_U_4(sflow_flow_raw->header_size)); + + /* QUESTION - should we attempt to print the raw header itself? + assuming of course there is enough data present to do so... */ + + return 0; +} + +static int +print_sflow_ethernet_frame(netdissect_options *ndo, + const u_char *pointer, u_int len) +{ + const struct sflow_ethernet_frame_t *sflow_ethernet_frame; + + if (len < sizeof(struct sflow_ethernet_frame_t)) + return 1; + + sflow_ethernet_frame = (const struct sflow_ethernet_frame_t *)pointer; + + ND_PRINT("\n\t frame len %u, type %u", + GET_BE_U_4(sflow_ethernet_frame->length), + GET_BE_U_4(sflow_ethernet_frame->type)); + + return 0; +} + +static int +print_sflow_extended_switch_data(netdissect_options *ndo, + const u_char *pointer, u_int len) +{ + const struct sflow_extended_switch_data_t *sflow_extended_sw_data; + + if (len < sizeof(struct sflow_extended_switch_data_t)) + return 1; + + sflow_extended_sw_data = (const struct sflow_extended_switch_data_t *)pointer; + ND_PRINT("\n\t src vlan %u, src pri %u, dst vlan %u, dst pri %u", + GET_BE_U_4(sflow_extended_sw_data->src_vlan), + GET_BE_U_4(sflow_extended_sw_data->src_pri), + GET_BE_U_4(sflow_extended_sw_data->dst_vlan), + GET_BE_U_4(sflow_extended_sw_data->dst_pri)); + + return 0; +} + +static int +sflow_print_flow_records(netdissect_options *ndo, + const u_char *pointer, u_int len, u_int records) +{ + u_int nrecords; + const u_char *tptr; + u_int tlen; + u_int flow_type; + u_int enterprise; + u_int flow_len; + const struct sflow_flow_record_t *sflow_flow_record; + + nrecords = records; + tptr = pointer; + tlen = len; + + while (nrecords > 0) { + /* do we have the "header?" */ + if (tlen < sizeof(struct sflow_flow_record_t)) + return 1; + + sflow_flow_record = (const struct sflow_flow_record_t *)tptr; + + /* so, the funky encoding means we cannot blythly mask-off + bits, we must also check the enterprise. */ + + enterprise = GET_BE_U_4(sflow_flow_record->format); + flow_type = enterprise & 0x0FFF; + enterprise = enterprise >> 12; + flow_len = GET_BE_U_4(sflow_flow_record->length); + ND_PRINT("\n\t enterprise %u %s (%u) length %u", + enterprise, + (enterprise == 0) ? tok2str(sflow_flow_type_values,"Unknown",flow_type) : "Unknown", + flow_type, + flow_len); + + tptr += sizeof(struct sflow_flow_record_t); + tlen -= sizeof(struct sflow_flow_record_t); + + if (tlen < flow_len) + return 1; + + if (enterprise == 0) { + switch (flow_type) { + case SFLOW_FLOW_RAW_PACKET: + if (print_sflow_raw_packet(ndo, tptr, tlen)) + return 1; + break; + case SFLOW_FLOW_EXTENDED_SWITCH_DATA: + if (print_sflow_extended_switch_data(ndo, tptr, tlen)) + return 1; + break; + case SFLOW_FLOW_ETHERNET_FRAME: + if (print_sflow_ethernet_frame(ndo, tptr, tlen)) + return 1; + break; + /* FIXME these need a decoder */ + case SFLOW_FLOW_IPV4_DATA: + case SFLOW_FLOW_IPV6_DATA: + case SFLOW_FLOW_EXTENDED_ROUTER_DATA: + case SFLOW_FLOW_EXTENDED_GATEWAY_DATA: + case SFLOW_FLOW_EXTENDED_USER_DATA: + case SFLOW_FLOW_EXTENDED_URL_DATA: + case SFLOW_FLOW_EXTENDED_MPLS_DATA: + case SFLOW_FLOW_EXTENDED_NAT_DATA: + case SFLOW_FLOW_EXTENDED_MPLS_TUNNEL: + case SFLOW_FLOW_EXTENDED_MPLS_VC: + case SFLOW_FLOW_EXTENDED_MPLS_FEC: + case SFLOW_FLOW_EXTENDED_MPLS_LVP_FEC: + case SFLOW_FLOW_EXTENDED_VLAN_TUNNEL: + break; + default: + if (ndo->ndo_vflag <= 1) + print_unknown_data(ndo, tptr, "\n\t\t", flow_len); + break; + } + } + tptr += flow_len; + tlen -= flow_len; + nrecords--; + + } + + return 0; +} + +static int +sflow_print_flow_sample(netdissect_options *ndo, + const u_char *pointer, u_int len) +{ + const struct sflow_flow_sample_t *sflow_flow_sample; + u_int nrecords; + + if (len < sizeof(struct sflow_flow_sample_t)) + return 1; + + sflow_flow_sample = (const struct sflow_flow_sample_t *)pointer; + + nrecords = GET_BE_U_4(sflow_flow_sample->records); + + ND_PRINT(" seqnum %u, type %u, idx %u, rate %u, pool %u, drops %u, input %u output %u records %u", + GET_BE_U_4(sflow_flow_sample->seqnum), + GET_U_1(sflow_flow_sample->type), + GET_BE_U_3(sflow_flow_sample->index), + GET_BE_U_4(sflow_flow_sample->rate), + GET_BE_U_4(sflow_flow_sample->pool), + GET_BE_U_4(sflow_flow_sample->drops), + GET_BE_U_4(sflow_flow_sample->in_interface), + GET_BE_U_4(sflow_flow_sample->out_interface), + nrecords); + + return sflow_print_flow_records(ndo, pointer + sizeof(struct sflow_flow_sample_t), + len - sizeof(struct sflow_flow_sample_t), + nrecords); +} + +static int +sflow_print_expanded_flow_sample(netdissect_options *ndo, + const u_char *pointer, u_int len) +{ + const struct sflow_expanded_flow_sample_t *sflow_expanded_flow_sample; + u_int nrecords; + + if (len < sizeof(struct sflow_expanded_flow_sample_t)) + return 1; + + sflow_expanded_flow_sample = (const struct sflow_expanded_flow_sample_t *)pointer; + + nrecords = GET_BE_U_4(sflow_expanded_flow_sample->records); + + ND_PRINT(" seqnum %u, type %u, idx %u, rate %u, pool %u, drops %u, records %u", + GET_BE_U_4(sflow_expanded_flow_sample->seqnum), + GET_BE_U_4(sflow_expanded_flow_sample->type), + GET_BE_U_4(sflow_expanded_flow_sample->index), + GET_BE_U_4(sflow_expanded_flow_sample->rate), + GET_BE_U_4(sflow_expanded_flow_sample->pool), + GET_BE_U_4(sflow_expanded_flow_sample->drops), + nrecords); + + return sflow_print_flow_records(ndo, pointer + sizeof(struct sflow_expanded_flow_sample_t), + len - sizeof(struct sflow_expanded_flow_sample_t), + nrecords); +} + +void +sflow_print(netdissect_options *ndo, + const u_char *pptr, u_int len) +{ + const struct sflow_datagram_t *sflow_datagram; + const struct sflow_v6_datagram_t *sflow_v6_datagram; + const struct sflow_sample_header *sflow_sample; + + const u_char *tptr; + u_int tlen; + uint32_t sflow_sample_type, sflow_sample_len; + uint32_t nsamples; + uint32_t ip_version; + + ndo->ndo_protocol = "sflow"; + tptr = pptr; + tlen = len; + sflow_datagram = (const struct sflow_datagram_t *)pptr; + sflow_v6_datagram = (const struct sflow_v6_datagram_t *)pptr; + ip_version = GET_BE_U_4(sflow_datagram->ip_version); + + if ((len < sizeof(struct sflow_datagram_t) && (ip_version == 1)) || + (len < sizeof(struct sflow_v6_datagram_t) && (ip_version == 2))) { + ND_PRINT("sFlowv%u", GET_BE_U_4(sflow_datagram->version)); + ND_PRINT(" [length %u < %zu]", len, sizeof(struct sflow_datagram_t)); + nd_print_invalid(ndo); + return; + } + ND_TCHECK_SIZE(sflow_datagram); + + /* + * Sanity checking of the header. + */ + if (GET_BE_U_4(sflow_datagram->version) != 5) { + ND_PRINT("sFlow version %u packet not supported", + GET_BE_U_4(sflow_datagram->version)); + return; + } + + if (ndo->ndo_vflag < 1) { + ND_PRINT("sFlowv%u, %s agent %s, agent-id %u, length %u", + GET_BE_U_4(sflow_datagram->version), + ip_version == 1 ? "IPv4" : "IPv6", + ip_version == 1 ? GET_IPADDR_STRING(sflow_datagram->agent) : + GET_IP6ADDR_STRING( sflow_v6_datagram->agent), + ip_version == 1 ? GET_BE_U_4(sflow_datagram->agent_id) : + GET_BE_U_4(sflow_v6_datagram->agent_id), + len); + return; + } + + /* ok they seem to want to know everything - lets fully decode it */ + if (ip_version == 1) { + nsamples=GET_BE_U_4(sflow_datagram->samples); + ND_PRINT("sFlowv%u, %s agent %s, agent-id %u, seqnum %u, uptime %u, samples %u, length %u", + GET_BE_U_4(sflow_datagram->version), + "IPv4", + GET_IPADDR_STRING(sflow_datagram->agent), + GET_BE_U_4(sflow_datagram->agent_id), + GET_BE_U_4(sflow_datagram->seqnum), + GET_BE_U_4(sflow_datagram->uptime), + nsamples, + len); + + /* skip Common header */ + ND_LCHECK_ZU(tlen, sizeof(struct sflow_datagram_t)); + tptr += sizeof(struct sflow_datagram_t); + tlen -= sizeof(struct sflow_datagram_t); + } else { + nsamples=GET_BE_U_4(sflow_v6_datagram->samples); + ND_PRINT("sFlowv%u, %s agent %s, agent-id %u, seqnum %u, uptime %u, samples %u, length %u", + GET_BE_U_4(sflow_v6_datagram->version), + "IPv6", + GET_IP6ADDR_STRING(sflow_v6_datagram->agent), + GET_BE_U_4(sflow_v6_datagram->agent_id), + GET_BE_U_4(sflow_v6_datagram->seqnum), + GET_BE_U_4(sflow_v6_datagram->uptime), + nsamples, + len); + + /* skip Common header */ + ND_LCHECK_ZU(tlen, sizeof(struct sflow_v6_datagram_t)); + tptr += sizeof(struct sflow_v6_datagram_t); + tlen -= sizeof(struct sflow_v6_datagram_t); + } + while (nsamples > 0 && tlen > 0) { + sflow_sample = (const struct sflow_sample_header *)tptr; + + sflow_sample_type = (GET_BE_U_4(sflow_sample->format)&0x0FFF); + sflow_sample_len = GET_BE_U_4(sflow_sample->len); + + if (tlen < sizeof(struct sflow_sample_header)) + goto invalid; + + tptr += sizeof(struct sflow_sample_header); + tlen -= sizeof(struct sflow_sample_header); + + ND_PRINT("\n\t%s (%u), length %u,", + tok2str(sflow_format_values, "Unknown", sflow_sample_type), + sflow_sample_type, + sflow_sample_len); + + /* basic sanity check */ + if (sflow_sample_type == 0 || sflow_sample_len ==0) { + return; + } + + if (tlen < sflow_sample_len) + goto invalid; + + /* did we capture enough for fully decoding the sample ? */ + ND_TCHECK_LEN(tptr, sflow_sample_len); + + switch(sflow_sample_type) { + case SFLOW_FLOW_SAMPLE: + if (sflow_print_flow_sample(ndo, tptr, tlen)) + goto invalid; + break; + + case SFLOW_COUNTER_SAMPLE: + if (sflow_print_counter_sample(ndo, tptr,tlen)) + goto invalid; + break; + + case SFLOW_EXPANDED_FLOW_SAMPLE: + if (sflow_print_expanded_flow_sample(ndo, tptr, tlen)) + goto invalid; + break; + + case SFLOW_EXPANDED_COUNTER_SAMPLE: + if (sflow_print_expanded_counter_sample(ndo, tptr,tlen)) + goto invalid; + break; + + default: + if (ndo->ndo_vflag <= 1) + print_unknown_data(ndo, tptr, "\n\t ", sflow_sample_len); + break; + } + tptr += sflow_sample_len; + tlen -= sflow_sample_len; + nsamples--; + } + return; + +invalid: + nd_print_invalid(ndo); + ND_TCHECK_LEN(tptr, tlen); +} |