494e177ada
The most significant changes are: - Use UMA zone instead of own chunk of memory. - Lock each hash entry separately. - Expire items "actively" - interrupt method can expire flows from hash slot, when it searches through it. - Remove global tailqueue. Make callout thread search through every hash slot. - Export datagram is detached from private data and filled. If it is incomplete, it is attached back. Another thread will continue working with it. Lesser, but also important speedups: - Flows in hash slot are stored in tailqueue. Whenever a flow is hit, it is moved to the begging, so it can be located quicker. - When callout thread works with hash slot it bails out if slot mutex is contested.
124 lines
5.1 KiB
C
124 lines
5.1 KiB
C
/*-
|
|
* Copyright (c) 2004 Gleb Smirnoff <glebius@FreeBSD.org>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* $SourceForge: netflow.h,v 1.8 2004/09/16 17:05:11 glebius Exp $
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
/* netflow timeouts in seconds */
|
|
|
|
#define ACTIVE_TIMEOUT (30*60) /* maximum flow lifetime is 30 min */
|
|
#define INACTIVE_TIMEOUT 15
|
|
|
|
/* More info can be found in these two Cisco documents:
|
|
* http://www.cisco.com/warp/public/cc/pd/iosw/ioft/neflct/tech/napps_wp.htm
|
|
* http://www.cisco.com/en/US/products/sw/netmgtsw/ps1964/prod_installation_guide09186a00800fea56.html#wp1006186
|
|
* However, they say quite different things.
|
|
*/
|
|
|
|
#define NETFLOW_V1 1
|
|
#define NETFLOW_V5 5
|
|
|
|
struct netflow_v1_header
|
|
{
|
|
uint16_t version; /* NetFlow version */
|
|
uint16_t count; /* Number of records in flow */
|
|
uint32_t sys_uptime; /* System uptime */
|
|
uint32_t unix_secs; /* Current seconds since 0000 UTC 1970 */
|
|
uint32_t unix_nsecs; /* Remaining nanoseconds since 0000 UTC 1970 */
|
|
} __attribute__((__packed__));
|
|
|
|
struct netflow_v5_header
|
|
{
|
|
uint16_t version; /* NetFlow version */
|
|
uint16_t count; /* Number of records in flow */
|
|
uint32_t sys_uptime; /* System uptime */
|
|
uint32_t unix_secs; /* Current seconds since 0000 UTC 1970 */
|
|
uint32_t unix_nsecs; /* Remaining nanoseconds since 0000 UTC 1970 */
|
|
uint32_t flow_seq; /* Sequence number of the first record */
|
|
uint8_t engine_type; /* Type of flow switching engine (RP,VIP,etc.) */
|
|
uint8_t engine_id; /* Slot number of the flow switching engine */
|
|
uint16_t pad; /* Pad to word boundary */
|
|
} __attribute__((__packed__));
|
|
|
|
struct netflow_v1_record
|
|
{
|
|
uint32_t src_addr; /* Source IP address */
|
|
uint32_t dst_addr; /* Destination IP address */
|
|
uint32_t next_hop; /* Next hop IP address */
|
|
uint16_t in_ifx; /* Source interface index */
|
|
uint16_t out_ifx; /* Destination interface index */
|
|
uint32_t packets; /* Number of packets in a flow */
|
|
uint32_t octets; /* Number of octets in a flow */
|
|
uint32_t first; /* System uptime at start of a flow */
|
|
uint32_t last; /* System uptime at end of a flow */
|
|
uint16_t s_port; /* Source port */
|
|
uint16_t d_port; /* Destination port */
|
|
uint16_t pad1; /* Pad to word boundary */
|
|
uint8_t prot; /* IP protocol */
|
|
uint8_t tos; /* IP type of service */
|
|
uint8_t flags; /* Cumulative OR of tcp flags */
|
|
uint8_t pad2; /* pad to word boundary */
|
|
uint16_t pad3; /* Pad to word boundary */
|
|
uint8_t reserved[5]; /* Reserved for future use */
|
|
} __attribute__((__packed__));
|
|
|
|
struct netflow_v5_record
|
|
{
|
|
uint32_t src_addr; /* Source IP address */
|
|
uint32_t dst_addr; /* Destination IP address */
|
|
uint32_t next_hop; /* Next hop IP address */
|
|
uint16_t i_ifx; /* Source interface index */
|
|
uint16_t o_ifx; /* Destination interface index */
|
|
uint32_t packets; /* Number of packets in a flow */
|
|
uint32_t octets; /* Number of octets in a flow */
|
|
uint32_t first; /* System uptime at start of a flow */
|
|
uint32_t last; /* System uptime at end of a flow */
|
|
uint16_t s_port; /* Source port */
|
|
uint16_t d_port; /* Destination port */
|
|
uint8_t pad1; /* pad to word boundary */
|
|
uint8_t flags; /* Cumulative OR of tcp flags */
|
|
uint8_t prot; /* IP protocol */
|
|
uint8_t tos; /* IP type of service */
|
|
uint16_t src_as; /* Src peer/origin Autonomous System */
|
|
uint16_t dst_as; /* Dst peer/origin Autonomous System */
|
|
uint8_t src_mask; /* Source route's mask bits */
|
|
uint8_t dst_mask; /* Destination route's mask bits */
|
|
uint16_t pad2; /* Pad to word boundary */
|
|
} __attribute__((__packed__));
|
|
|
|
#define NETFLOW_V1_MAX_RECORDS 24
|
|
#define NETFLOW_V5_MAX_RECORDS 30
|
|
|
|
#define NETFLOW_V1_MAX_SIZE (sizeof(netflow_v1_header)+ \
|
|
sizeof(netflow_v1_record)*NETFLOW_V1_MAX_RECORDS)
|
|
#define NETFLOW_V5_MAX_SIZE (sizeof(netflow_v5_header)+ \
|
|
sizeof(netflow_v5_record)*NETFLOW_V5_MAX_RECORDS)
|
|
|
|
struct netflow_v5_export_dgram {
|
|
struct netflow_v5_header header;
|
|
struct netflow_v5_record r[NETFLOW_V5_MAX_RECORDS];
|
|
} __attribute__((__packed__));
|