/* * 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 * * Expansion and refactoring by Rick Jones */ /* \summary: sFlow protocol printer */ /* specification: https://sflow.org/developers/specifications.php */ #include #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 blithely 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_ICHECK_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_ICHECK_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); }