149 lines
6.4 KiB
C
149 lines
6.4 KiB
C
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/*-
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* Copyright (c) 2010 Alexander V. Chernikov <melifaro@ipfw.ru>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _NETFLOW_V9_H_
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#define _NETFLOW_V9_H_
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#ifdef COUNTERS_64
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#define CNTR uint64_t
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#define CNTR_MAX UINT64_MAX
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#else
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#define CNTR uint32_t
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#define CNTR_MAX UINT_MAX
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#endif
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struct netflow_v9_template
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{
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int field_id;
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int field_length;
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};
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/* Template ID for tcp/udp v4 streams ID:257 (0x100 + NETFLOW_V9_FLOW_V4_L4) */
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struct netflow_v9_record_ipv4_tcp
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{
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uint32_t src_addr; /* Source IPv4 address (IPV4_SRC_ADDR) */
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uint32_t dst_addr; /* Destination IPv4 address (IPV4_DST_ADDR) */
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uint32_t next_hop; /* Next hop IPv4 address (IPV4_NEXT_HOP) */
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uint16_t i_ifx; /* Source interface index (INPUT_SNMP) */
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uint16_t o_ifx; /* Destination interface index (OUTPUT_SNMP) */
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CNTR i_packets; /* Number of incoming packets in a flow (IN_PKTS) */
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CNTR i_octets; /* Number of incoming octets in a flow (IN_BYTES) */
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CNTR o_packets; /* Number of outgoing packets in a flow (OUT_PKTS) */
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CNTR o_octets; /* Number of outgoing octets in a flow (OUT_BYTES) */
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uint32_t first; /* System uptime at start of a flow (FIRST_SWITCHED) */
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uint32_t last; /* System uptime at end of a flow (LAST_SWITCHED) */
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uint16_t s_port; /* Source port (L4_SRC_PORT) */
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uint16_t d_port; /* Destination port (L4_DST_PORT) */
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uint8_t flags; /* Cumulative OR of tcp flags (TCP_FLAGS) */
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uint8_t prot; /* IP protocol */
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uint8_t tos; /* IP type of service IN (or OUT) (TOS) */
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uint32_t src_as; /* Src peer/origin Autonomous System (SRC_AS) */
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uint32_t dst_as; /* Dst peer/origin Autonomous System (DST_AS) */
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uint8_t src_mask; /* Source route's mask bits (SRC_MASK) */
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uint8_t dst_mask; /* Destination route's mask bits (DST_MASK) */
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} __attribute__((__packed__));
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/* Template ID for tcp/udp v6 streams ID: 260 (0x100 + NETFLOW_V9_FLOW_V6_L4) */
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struct netflow_v9_record_ipv6_tcp
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{
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struct in6_addr src_addr; /* Source IPv6 address (IPV6_SRC_ADDR) */
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struct in6_addr dst_addr; /* Destination IPv6 address (IPV6_DST_ADDR) */
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struct in6_addr next_hop; /* Next hop IPv6 address (IPV6_NEXT_HOP) */
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uint16_t i_ifx; /* Source interface index (INPUT_SNMP) */
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uint16_t o_ifx; /* Destination interface index (OUTPUT_SNMP) */
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CNTR i_packets; /* Number of incoming packets in a flow (IN_PKTS) */
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CNTR i_octets; /* Number of incoming octets in a flow (IN_BYTES) */
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CNTR o_packets; /* Number of outgoing packets in a flow (OUT_PKTS) */
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CNTR o_octets; /* Number of outgoing octets in a flow (OUT_BYTES) */
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uint32_t first; /* System uptime at start of a flow (FIRST_SWITCHED) */
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uint32_t last; /* System uptime at end of a flow (LAST_SWITCHED) */
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uint16_t s_port; /* Source port (L4_SRC_PORT) */
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uint16_t d_port; /* Destination port (L4_DST_PORT) */
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uint8_t flags; /* Cumulative OR of tcp flags (TCP_FLAGS) */
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uint8_t prot; /* IP protocol */
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uint8_t tos; /* IP type of service IN (or OUT) (TOS) */
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uint32_t src_as; /* Src peer/origin Autonomous System (SRC_AS) */
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uint32_t dst_as; /* Dst peer/origin Autonomous System (DST_AS) */
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uint8_t src_mask; /* Source route's mask bits (SRC_MASK) */
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uint8_t dst_mask; /* Destination route's mask bits (DST_MASK) */
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} __attribute__((__packed__));
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/* Used in export9_add to determine max record size */
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struct netflow_v9_record_general
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{
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union {
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struct netflow_v9_record_ipv4_tcp v4_tcp;
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struct netflow_v9_record_ipv6_tcp v6_tcp;
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} rec;
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};
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#define BASE_MTU 1500
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#define MIN_MTU sizeof(struct netflow_v5_header)
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#define MAX_MTU 16384
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#define NETFLOW_V9_MAX_SIZE _NETFLOW_V9_MAX_SIZE(BASE_MTU)
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/* Decrease MSS by 16 since there can be some IPv[46] header options */
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#define _NETFLOW_V9_MAX_SIZE(x) (x) - sizeof(struct ip6_hdr) - sizeof(struct udphdr) - 16
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/* #define NETFLOW_V9_MAX_FLOWSETS 2 */
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#define NETFLOW_V9_MAX_RECORD_SIZE sizeof(struct netflow_v9_record_ipv6_tcp)
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#define NETFLOW_V9_MAX_PACKETS_TEMPL 500 /* Send data templates every ... packets */
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#define NETFLOW_V9_MAX_TIME_TEMPL 600 /* Send data templates every ... seconds */
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#define NETFLOW_V9_MAX_TEMPLATES 16 /* Not a real value */
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#define _NETFLOW_V9_TEMPLATE_SIZE(x) (sizeof(x) / sizeof(struct netflow_v9_template)) * 4
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//#define _NETFLOW_V9_TEMPLATE_SIZE(x) ((x) + 1) * 4
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/* Flow Templates */
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#define NETFLOW_V9_FLOW_V4_L4 1 /* IPv4 TCP/UDP packet */
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#define NETFLOW_V9_FLOW_V4_ICMP 2 /* IPv4 ICMP packet, currently unused */
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#define NETFLOW_V9_FLOW_V4_L3 3 /* IPv4 IP packet */
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#define NETFLOW_V9_FLOW_V6_L4 4 /* IPv6 TCP/UDP packet */
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#define NETFLOW_V9_FLOW_V6_ICMP 5 /* IPv6 ICMP packet, currently unused */
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#define NETFLOW_V9_FLOW_V6_L3 6 /* IPv6 IP packet */
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#define NETFLOW_V9_FLOW_FAKE 65535 /* Not uset used in real flowsets! */
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struct netflow_v9_export_dgram {
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struct netflow_v9_header header;
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char *data; /* MTU can change, record length is dynamic */
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};
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struct netflow_v9_flowset_header {
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uint16_t id; /* FlowSet id */
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uint16_t length; /* FlowSet length */
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} __attribute__((__packed__));
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struct netflow_v9_packet_opt {
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uint16_t length; /* current packet length */
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uint16_t count; /* current records count */
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uint16_t mtu; /* max MTU shapshot */
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uint16_t flow_type; /* current flowset */
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uint16_t flow_header; /* offset pointing to current flow header */
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};
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#endif
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