sys/netgraph7/netflow/netflow.h

   1 /*-
   2  * Copyright (c) 2004 Gleb Smirnoff <glebius@FreeBSD.org>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  *
  26  *       $SourceForge: netflow.h,v 1.8 2004/09/16 17:05:11 glebius Exp $
  27  *       $FreeBSD: src/sys/netgraph/netflow/netflow.h,v 1.4 2006/04/25 20:01:50 maxim Exp $
  28  */
  29
  30 /* netflow timeouts in seconds */
  31
  32 #define ACTIVE_TIMEOUT          (30*60) /* maximum flow lifetime is 30 min */
  33 #define INACTIVE_TIMEOUT        15
  34
  35 /*
  36  * More info can be found in these Cisco documents:
  37  *
  38  * Cisco IOS NetFlow, White Papers.
  39  * http://www.cisco.com/en/US/products/ps6601/prod_white_papers_list.html
  40  *
  41  * Cisco CNS NetFlow Collection Engine User Guide, 5.0.2, NetFlow Export
  42  * Datagram Formats.
  43  * http://www.cisco.com/en/US/products/sw/netmgtsw/ps1964/products_user_guide_chapter09186a00803f3147.html#wp26453
  44  *
  45  */
  46
  47 #define NETFLOW_V1 1
  48 #define NETFLOW_V5 5
  49
  50 struct netflow_v1_header
  51 {
  52   uint16_t version;     /* NetFlow version */
  53   uint16_t count;       /* Number of records in flow */
  54   uint32_t sys_uptime;  /* System uptime */
  55   uint32_t unix_secs;   /* Current seconds since 0000 UTC 1970 */
  56   uint32_t unix_nsecs;  /* Remaining nanoseconds since 0000 UTC 1970 */
  57 } __attribute__((__packed__));
  58
  59 struct netflow_v5_header
  60 {
  61   uint16_t version;     /* NetFlow version */
  62   uint16_t count;       /* Number of records in flow */
  63   uint32_t sys_uptime;  /* System uptime */
  64   uint32_t unix_secs;   /* Current seconds since 0000 UTC 1970 */
  65   uint32_t unix_nsecs;  /* Remaining nanoseconds since 0000 UTC 1970 */
  66   uint32_t flow_seq;    /* Sequence number of the first record */
  67   uint8_t engine_type;  /* Type of flow switching engine (RP,VIP,etc.) */
  68   uint8_t engine_id;    /* Slot number of the flow switching engine */
  69   uint16_t pad;         /* Pad to word boundary */
  70 } __attribute__((__packed__));
  71
  72 struct netflow_v1_record
  73 {
  74   uint32_t src_addr;    /* Source IP address */
  75   uint32_t dst_addr;    /* Destination IP address */
  76   uint32_t next_hop;    /* Next hop IP address */
  77   uint16_t in_ifx;      /* Source interface index */
  78   uint16_t out_ifx;     /* Destination interface index */
  79   uint32_t packets;     /* Number of packets in a flow */
  80   uint32_t octets;      /* Number of octets in a flow */
  81   uint32_t first;       /* System uptime at start of a flow */
  82   uint32_t last;        /* System uptime at end of a flow */
  83   uint16_t s_port;      /* Source port */
  84   uint16_t d_port;      /* Destination port */
  85   uint16_t pad1;        /* Pad to word boundary */
  86   uint8_t prot;         /* IP protocol */
  87   uint8_t tos;          /* IP type of service */
  88   uint8_t flags;        /* Cumulative OR of tcp flags */
  89   uint8_t pad2;         /* Pad to word boundary */
  90   uint16_t pad3;        /* Pad to word boundary */
  91   uint8_t reserved[5];  /* Reserved for future use */
  92 } __attribute__((__packed__));
  93
  94 struct netflow_v5_record
  95 {
  96   uint32_t src_addr;    /* Source IP address */
  97   uint32_t dst_addr;    /* Destination IP address */
  98   uint32_t next_hop;    /* Next hop IP address */
  99   uint16_t i_ifx;       /* Source interface index */
 100   uint16_t o_ifx;       /* Destination interface index */
 101   uint32_t packets;     /* Number of packets in a flow */
 102   uint32_t octets;      /* Number of octets in a flow */
 103   uint32_t first;       /* System uptime at start of a flow */
 104   uint32_t last;        /* System uptime at end of a flow */
 105   uint16_t s_port;      /* Source port */
 106   uint16_t d_port;      /* Destination port */
 107   uint8_t pad1;         /* Pad to word boundary */
 108   uint8_t flags;        /* Cumulative OR of tcp flags */
 109   uint8_t prot;         /* IP protocol */
 110   uint8_t tos;          /* IP type of service */
 111   uint16_t src_as;      /* Src peer/origin Autonomous System */
 112   uint16_t dst_as;      /* Dst peer/origin Autonomous System */
 113   uint8_t src_mask;     /* Source route's mask bits */
 114   uint8_t dst_mask;     /* Destination route's mask bits */
 115   uint16_t pad2;        /* Pad to word boundary */
 116 } __attribute__((__packed__));
 117
 118 #define NETFLOW_V1_MAX_RECORDS 24
 119 #define NETFLOW_V5_MAX_RECORDS 30
 120
 121 #define NETFLOW_V1_MAX_SIZE (sizeof(netflow_v1_header)+ \
 122                              sizeof(netflow_v1_record)*NETFLOW_V1_MAX_RECORDS)
 123 #define NETFLOW_V5_MAX_SIZE (sizeof(netflow_v5_header)+ \
 124                              sizeof(netflow_v5_record)*NETFLOW_V5_MAX_RECORDS)
 125
 126 struct netflow_v5_export_dgram {
 127         struct netflow_v5_header        header;
 128         struct netflow_v5_record        r[NETFLOW_V5_MAX_RECORDS];
 129 } __attribute__((__packed__));