The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/netgraph/netflow/netflow_v9.h

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    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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