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: releng/12.0/sys/netgraph/netflow/netflow_v9.h 326272 2017-11-27 15:23:17Z pfg $
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 shapshot */
147 uint16_t flow_type; /* current flowset */
148 uint16_t flow_header; /* offset pointing to current flow header */
149 };
150 #endif
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