1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2010 Alexander V. Chernikov <melifaro@ipfw.ru> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD$ 29 */ 30 31 #ifndef _NETFLOW_V9_H_ 32 #define _NETFLOW_V9_H_ 33 34 #ifdef COUNTERS_64 35 #define CNTR uint64_t 36 #define CNTR_MAX UINT64_MAX 37 #else 38 #define CNTR uint32_t 39 #define CNTR_MAX UINT_MAX 40 #endif 41 42 struct netflow_v9_template 43 { 44 int field_id; 45 int field_length; 46 }; 47 48 /* Template ID for tcp/udp v4 streams ID:257 (0x100 + NETFLOW_V9_FLOW_V4_L4) */ 49 struct netflow_v9_record_ipv4_tcp 50 { 51 uint32_t src_addr; /* Source IPv4 address (IPV4_SRC_ADDR) */ 52 uint32_t dst_addr; /* Destination IPv4 address (IPV4_DST_ADDR) */ 53 uint32_t next_hop; /* Next hop IPv4 address (IPV4_NEXT_HOP) */ 54 uint16_t i_ifx; /* Source interface index (INPUT_SNMP) */ 55 uint16_t o_ifx; /* Destination interface index (OUTPUT_SNMP) */ 56 CNTR i_packets; /* Number of incoming packets in a flow (IN_PKTS) */ 57 CNTR i_octets; /* Number of incoming octets in a flow (IN_BYTES) */ 58 CNTR o_packets; /* Number of outgoing packets in a flow (OUT_PKTS) */ 59 CNTR o_octets; /* Number of outgoing octets in a flow (OUT_BYTES) */ 60 uint32_t first; /* System uptime at start of a flow (FIRST_SWITCHED) */ 61 uint32_t last; /* System uptime at end of a flow (LAST_SWITCHED) */ 62 uint16_t s_port; /* Source port (L4_SRC_PORT) */ 63 uint16_t d_port; /* Destination port (L4_DST_PORT) */ 64 uint8_t flags; /* Cumulative OR of tcp flags (TCP_FLAGS) */ 65 uint8_t prot; /* IP protocol */ 66 uint8_t tos; /* IP type of service IN (or OUT) (TOS) */ 67 uint32_t src_as; /* Src peer/origin Autonomous System (SRC_AS) */ 68 uint32_t dst_as; /* Dst peer/origin Autonomous System (DST_AS) */ 69 uint8_t src_mask; /* Source route's mask bits (SRC_MASK) */ 70 uint8_t dst_mask; /* Destination route's mask bits (DST_MASK) */ 71 } __attribute__((__packed__)); 72 73 /* Template ID for tcp/udp v6 streams ID: 260 (0x100 + NETFLOW_V9_FLOW_V6_L4) */ 74 struct netflow_v9_record_ipv6_tcp 75 { 76 struct in6_addr src_addr; /* Source IPv6 address (IPV6_SRC_ADDR) */ 77 struct in6_addr dst_addr; /* Destination IPv6 address (IPV6_DST_ADDR) */ 78 struct in6_addr next_hop; /* Next hop IPv6 address (IPV6_NEXT_HOP) */ 79 uint16_t i_ifx; /* Source interface index (INPUT_SNMP) */ 80 uint16_t o_ifx; /* Destination interface index (OUTPUT_SNMP) */ 81 CNTR i_packets; /* Number of incoming packets in a flow (IN_PKTS) */ 82 CNTR i_octets; /* Number of incoming octets in a flow (IN_BYTES) */ 83 CNTR o_packets; /* Number of outgoing packets in a flow (OUT_PKTS) */ 84 CNTR o_octets; /* Number of outgoing octets in a flow (OUT_BYTES) */ 85 uint32_t first; /* System uptime at start of a flow (FIRST_SWITCHED) */ 86 uint32_t last; /* System uptime at end of a flow (LAST_SWITCHED) */ 87 uint16_t s_port; /* Source port (L4_SRC_PORT) */ 88 uint16_t d_port; /* Destination port (L4_DST_PORT) */ 89 uint8_t flags; /* Cumulative OR of tcp flags (TCP_FLAGS) */ 90 uint8_t prot; /* IP protocol */ 91 uint8_t tos; /* IP type of service IN (or OUT) (TOS) */ 92 uint32_t src_as; /* Src peer/origin Autonomous System (SRC_AS) */ 93 uint32_t dst_as; /* Dst peer/origin Autonomous System (DST_AS) */ 94 uint8_t src_mask; /* Source route's mask bits (SRC_MASK) */ 95 uint8_t dst_mask; /* Destination route's mask bits (DST_MASK) */ 96 } __attribute__((__packed__)); 97 98 /* Used in export9_add to determine max record size */ 99 struct netflow_v9_record_general 100 { 101 union { 102 struct netflow_v9_record_ipv4_tcp v4_tcp; 103 struct netflow_v9_record_ipv6_tcp v6_tcp; 104 } rec; 105 }; 106 107 #define BASE_MTU 1500 108 #define MIN_MTU sizeof(struct netflow_v5_header) 109 #define MAX_MTU 16384 110 #define NETFLOW_V9_MAX_SIZE _NETFLOW_V9_MAX_SIZE(BASE_MTU) 111 /* Decrease MSS by 16 since there can be some IPv[46] header options */ 112 #define _NETFLOW_V9_MAX_SIZE(x) (x) - sizeof(struct ip6_hdr) - sizeof(struct udphdr) - 16 113 114 /* #define NETFLOW_V9_MAX_FLOWSETS 2 */ 115 116 #define NETFLOW_V9_MAX_RECORD_SIZE sizeof(struct netflow_v9_record_ipv6_tcp) 117 #define NETFLOW_V9_MAX_PACKETS_TEMPL 500 /* Send data templates every ... packets */ 118 #define NETFLOW_V9_MAX_TIME_TEMPL 600 /* Send data templates every ... seconds */ 119 #define NETFLOW_V9_MAX_TEMPLATES 16 /* Not a real value */ 120 #define _NETFLOW_V9_TEMPLATE_SIZE(x) (sizeof(x) / sizeof(struct netflow_v9_template)) * 4 121 //#define _NETFLOW_V9_TEMPLATE_SIZE(x) ((x) + 1) * 4 122 123 /* Flow Templates */ 124 #define NETFLOW_V9_FLOW_V4_L4 1 /* IPv4 TCP/UDP packet */ 125 #define NETFLOW_V9_FLOW_V4_ICMP 2 /* IPv4 ICMP packet, currently unused */ 126 #define NETFLOW_V9_FLOW_V4_L3 3 /* IPv4 IP packet */ 127 #define NETFLOW_V9_FLOW_V6_L4 4 /* IPv6 TCP/UDP packet */ 128 #define NETFLOW_V9_FLOW_V6_ICMP 5 /* IPv6 ICMP packet, currently unused */ 129 #define NETFLOW_V9_FLOW_V6_L3 6 /* IPv6 IP packet */ 130 131 #define NETFLOW_V9_FLOW_FAKE 65535 /* Not uset used in real flowsets! */ 132 133 struct netflow_v9_export_dgram { 134 struct netflow_v9_header header; 135 char *data; /* MTU can change, record length is dynamic */ 136 }; 137 138 struct netflow_v9_flowset_header { 139 uint16_t id; /* FlowSet id */ 140 uint16_t length; /* FlowSet length */ 141 } __attribute__((__packed__)); 142 143 struct netflow_v9_packet_opt { 144 uint16_t length; /* current packet length */ 145 uint16_t count; /* current records count */ 146 uint16_t mtu; /* max MTU snapshot */ 147 uint16_t flow_type; /* current flowset */ 148 uint16_t flow_header; /* offset pointing to current flow header */ 149 }; 150 #endif 151