fe267a5590
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. No functional change intended.
545 lines
18 KiB
C
545 lines
18 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2010-2011 Alexander V. Chernikov <melifaro@ipfw.ru>
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* Copyright (c) 2004-2005 Gleb Smirnoff <glebius@FreeBSD.org>
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* Copyright (c) 2001-2003 Roman V. Palagin <romanp@unshadow.net>
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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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* $SourceForge: ng_netflow.h,v 1.26 2004/09/04 15:44:55 glebius Exp $
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* $FreeBSD$
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*/
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#ifndef _NG_NETFLOW_H_
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#define _NG_NETFLOW_H_
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#define NG_NETFLOW_NODE_TYPE "netflow"
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#define NGM_NETFLOW_COOKIE 1365756954
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#define NGM_NETFLOW_V9_COOKIE 1349865386
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#define NG_NETFLOW_MAXIFACES USHRT_MAX
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/* Hook names */
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#define NG_NETFLOW_HOOK_DATA "iface"
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#define NG_NETFLOW_HOOK_OUT "out"
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#define NG_NETFLOW_HOOK_EXPORT "export"
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#define NG_NETFLOW_HOOK_EXPORT9 "export9"
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/* This define effectively disable (v5) netflow export hook! */
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/* #define COUNTERS_64 */
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/* Netgraph commands understood by netflow node */
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enum {
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NGM_NETFLOW_INFO = 1|NGM_READONLY|NGM_HASREPLY, /* get node info */
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NGM_NETFLOW_IFINFO = 2|NGM_READONLY|NGM_HASREPLY, /* get iface info */
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NGM_NETFLOW_SHOW = 3|NGM_READONLY|NGM_HASREPLY, /* show ip cache flow */
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NGM_NETFLOW_SETDLT = 4, /* set data-link type */
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NGM_NETFLOW_SETIFINDEX = 5, /* set interface index */
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NGM_NETFLOW_SETTIMEOUTS = 6, /* set active/inactive flow timeouts */
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NGM_NETFLOW_SETCONFIG = 7, /* set flow generation options */
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NGM_NETFLOW_SETTEMPLATE = 8, /* set v9 flow template periodic */
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NGM_NETFLOW_SETMTU = 9, /* set outgoing interface MTU */
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NGM_NETFLOW_V9INFO = 10|NGM_READONLY|NGM_HASREPLY, /* get v9 info */
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};
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/* This structure is returned by the NGM_NETFLOW_INFO message */
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struct ng_netflow_info {
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uint64_t nfinfo_bytes; /* accounted IPv4 bytes */
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uint64_t nfinfo_packets; /* accounted IPv4 packets */
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uint64_t nfinfo_bytes6; /* accounted IPv6 bytes */
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uint64_t nfinfo_packets6; /* accounted IPv6 packets */
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uint64_t nfinfo_sbytes; /* skipped IPv4 bytes */
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uint64_t nfinfo_spackets; /* skipped IPv4 packets */
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uint64_t nfinfo_sbytes6; /* skipped IPv6 bytes */
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uint64_t nfinfo_spackets6; /* skipped IPv6 packets */
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uint64_t nfinfo_act_exp; /* active expiries */
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uint64_t nfinfo_inact_exp; /* inactive expiries */
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uint32_t nfinfo_used; /* used cache records */
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uint32_t nfinfo_used6; /* used IPv6 cache records */
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uint32_t nfinfo_alloc_failed; /* failed allocations */
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uint32_t nfinfo_export_failed; /* failed exports */
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uint32_t nfinfo_export9_failed; /* failed exports */
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uint32_t nfinfo_realloc_mbuf; /* reallocated mbufs */
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uint32_t nfinfo_alloc_fibs; /* fibs allocated */
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uint32_t nfinfo_inact_t; /* flow inactive timeout */
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uint32_t nfinfo_act_t; /* flow active timeout */
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};
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/* Parse the info structure */
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#define NG_NETFLOW_INFO_TYPE { \
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{ "IPv4 bytes", &ng_parse_uint64_type },\
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{ "IPv4 packets", &ng_parse_uint64_type },\
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{ "IPv6 bytes", &ng_parse_uint64_type },\
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{ "IPv6 packets", &ng_parse_uint64_type },\
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{ "IPv4 skipped bytes", &ng_parse_uint64_type },\
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{ "IPv4 skipped packets", &ng_parse_uint64_type },\
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{ "IPv6 skipped bytes", &ng_parse_uint64_type },\
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{ "IPv6 skipped packets", &ng_parse_uint64_type },\
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{ "Active expiries", &ng_parse_uint64_type },\
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{ "Inactive expiries", &ng_parse_uint64_type },\
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{ "IPv4 records used", &ng_parse_uint32_type },\
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{ "IPv6 records used", &ng_parse_uint32_type },\
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{ "Failed allocations", &ng_parse_uint32_type },\
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{ "V5 failed exports", &ng_parse_uint32_type },\
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{ "V9 failed exports", &ng_parse_uint32_type },\
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{ "mbuf reallocations", &ng_parse_uint32_type },\
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{ "fibs allocated", &ng_parse_uint32_type },\
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{ "Inactive timeout", &ng_parse_uint32_type },\
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{ "Active timeout", &ng_parse_uint32_type },\
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{ NULL } \
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}
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/* This structure is returned by the NGM_NETFLOW_IFINFO message */
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struct ng_netflow_ifinfo {
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uint32_t ifinfo_packets; /* number of packets for this iface */
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uint8_t ifinfo_dlt; /* Data Link Type, DLT_XXX */
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#define MAXDLTNAMELEN 20
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uint16_t ifinfo_index; /* connected iface index */
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uint32_t conf;
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};
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/* This structure is passed to NGM_NETFLOW_SETDLT message */
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struct ng_netflow_setdlt {
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uint16_t iface; /* which iface dlt change */
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uint8_t dlt; /* DLT_XXX from bpf.h */
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};
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/* This structure is passed to NGM_NETFLOW_SETIFINDEX */
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struct ng_netflow_setifindex {
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uint16_t iface; /* which iface index change */
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uint16_t index; /* new index */
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};
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/* This structure is passed to NGM_NETFLOW_SETTIMEOUTS */
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struct ng_netflow_settimeouts {
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uint32_t inactive_timeout; /* flow inactive timeout */
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uint32_t active_timeout; /* flow active timeout */
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};
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#define NG_NETFLOW_CONF_INGRESS 0x01 /* Account on ingress */
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#define NG_NETFLOW_CONF_EGRESS 0x02 /* Account on egress */
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#define NG_NETFLOW_CONF_ONCE 0x04 /* Add tag to account only once */
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#define NG_NETFLOW_CONF_THISONCE 0x08 /* Account once in current node */
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#define NG_NETFLOW_CONF_NOSRCLOOKUP 0x10 /* No radix lookup on src */
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#define NG_NETFLOW_CONF_NODSTLOOKUP 0x20 /* No radix lookup on dst */
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#define NG_NETFLOW_IS_FRAG 0x01
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#define NG_NETFLOW_FLOW_FLAGS (NG_NETFLOW_CONF_NOSRCLOOKUP|\
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NG_NETFLOW_CONF_NODSTLOOKUP)
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/* This structure is passed to NGM_NETFLOW_SETCONFIG */
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struct ng_netflow_setconfig {
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uint16_t iface; /* which iface config change */
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uint32_t conf; /* new config */
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};
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/* This structure is passed to NGM_NETFLOW_SETTEMPLATE */
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struct ng_netflow_settemplate {
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uint16_t time; /* max time between announce */
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uint16_t packets; /* max packets between announce */
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};
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/* This structure is passed to NGM_NETFLOW_SETMTU */
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struct ng_netflow_setmtu {
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uint16_t mtu; /* MTU for packet */
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};
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/* This structure is used in NGM_NETFLOW_SHOW request/response */
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struct ngnf_show_header {
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u_char version; /* IPv4 or IPv6 */
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uint32_t hash_id; /* current hash index */
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uint32_t list_id; /* current record number in hash */
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uint32_t nentries; /* number of records in response */
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};
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/* This structure is used in NGM_NETFLOW_V9INFO message */
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struct ng_netflow_v9info {
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uint16_t templ_packets; /* v9 template packets */
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uint16_t templ_time; /* v9 template time */
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uint16_t mtu; /* v9 MTU */
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};
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/* XXXGL
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* Somewhere flow_rec6 is casted to flow_rec, and flow6_entry_data is
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* casted to flow_entry_data. After casting, fle->r.fib is accessed.
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* So beginning of these structs up to fib should be kept common.
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*/
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/* This is unique data, which identifies flow */
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struct flow_rec {
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uint16_t flow_type;
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uint16_t fib;
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struct in_addr r_src;
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struct in_addr r_dst;
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union {
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struct {
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uint16_t s_port; /* source TCP/UDP port */
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uint16_t d_port; /* destination TCP/UDP port */
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} dir;
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uint32_t both;
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} ports;
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union {
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struct {
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u_char prot; /* IP protocol */
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u_char tos; /* IP TOS */
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uint16_t i_ifx; /* input interface index */
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} i;
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uint32_t all;
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} misc;
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};
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/* This is unique data, which identifies flow */
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struct flow6_rec {
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uint16_t flow_type;
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uint16_t fib;
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union {
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struct in_addr r_src;
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struct in6_addr r_src6;
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} src;
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union {
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struct in_addr r_dst;
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struct in6_addr r_dst6;
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} dst;
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union {
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struct {
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uint16_t s_port; /* source TCP/UDP port */
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uint16_t d_port; /* destination TCP/UDP port */
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} dir;
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uint32_t both;
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} ports;
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union {
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struct {
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u_char prot; /* IP protocol */
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u_char tos; /* IP TOS */
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uint16_t i_ifx; /* input interface index */
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} i;
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uint32_t all;
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} misc;
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};
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#define r_ip_p misc.i.prot
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#define r_tos misc.i.tos
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#define r_i_ifx misc.i.i_ifx
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#define r_misc misc.all
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#define r_ports ports.both
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#define r_sport ports.dir.s_port
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#define r_dport ports.dir.d_port
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/* A flow entry which accumulates statistics */
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struct flow_entry_data {
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uint16_t version; /* Protocol version */
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struct flow_rec r;
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struct in_addr next_hop;
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uint16_t fle_o_ifx; /* output interface index */
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#define fle_i_ifx r.misc.i.i_ifx
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uint8_t dst_mask; /* destination route mask bits */
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uint8_t src_mask; /* source route mask bits */
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u_long packets;
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u_long bytes;
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long first; /* uptime on first packet */
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long last; /* uptime on last packet */
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u_char tcp_flags; /* cumulative OR */
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};
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struct flow6_entry_data {
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uint16_t version; /* Protocol version */
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struct flow6_rec r;
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union {
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struct in_addr next_hop;
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struct in6_addr next_hop6;
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} n;
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uint16_t fle_o_ifx; /* output interface index */
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#define fle_i_ifx r.misc.i.i_ifx
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uint8_t dst_mask; /* destination route mask bits */
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uint8_t src_mask; /* source route mask bits */
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u_long packets;
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u_long bytes;
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long first; /* uptime on first packet */
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long last; /* uptime on last packet */
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u_char tcp_flags; /* cumulative OR */
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};
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/*
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* How many flow records we will transfer at once
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* without overflowing socket receive buffer
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*/
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#define NREC_AT_ONCE 1000
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#define NREC6_AT_ONCE (NREC_AT_ONCE * sizeof(struct flow_entry_data) / \
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sizeof(struct flow6_entry_data))
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#define NGRESP_SIZE (sizeof(struct ngnf_show_header) + (NREC_AT_ONCE * \
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sizeof(struct flow_entry_data)))
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#define SORCVBUF_SIZE (NGRESP_SIZE + 2 * sizeof(struct ng_mesg))
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/* Everything below is for kernel */
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#ifdef _KERNEL
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struct flow_entry {
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TAILQ_ENTRY(flow_entry) fle_hash; /* entries in hash slot */
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struct flow_entry_data f;
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};
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struct flow6_entry {
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TAILQ_ENTRY(flow_entry) fle_hash; /* entries in hash slot */
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struct flow6_entry_data f;
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};
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/* Parsing declarations */
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/* Parse the ifinfo structure */
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#define NG_NETFLOW_IFINFO_TYPE { \
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{ "packets", &ng_parse_uint32_type },\
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{ "data link type", &ng_parse_uint8_type }, \
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{ "index", &ng_parse_uint16_type },\
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{ "conf", &ng_parse_uint32_type },\
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{ NULL } \
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}
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/* Parse the setdlt structure */
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#define NG_NETFLOW_SETDLT_TYPE { \
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{ "iface", &ng_parse_uint16_type }, \
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{ "dlt", &ng_parse_uint8_type }, \
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{ NULL } \
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}
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/* Parse the setifindex structure */
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#define NG_NETFLOW_SETIFINDEX_TYPE { \
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{ "iface", &ng_parse_uint16_type }, \
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{ "index", &ng_parse_uint16_type }, \
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{ NULL } \
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}
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/* Parse the settimeouts structure */
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#define NG_NETFLOW_SETTIMEOUTS_TYPE { \
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{ "inactive", &ng_parse_uint32_type }, \
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{ "active", &ng_parse_uint32_type }, \
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{ NULL } \
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}
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/* Parse the setifindex structure */
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#define NG_NETFLOW_SETCONFIG_TYPE { \
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{ "iface", &ng_parse_uint16_type }, \
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{ "conf", &ng_parse_uint32_type }, \
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{ NULL } \
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}
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/* Parse the settemplate structure */
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#define NG_NETFLOW_SETTEMPLATE_TYPE { \
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{ "time", &ng_parse_uint16_type }, \
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{ "packets", &ng_parse_uint16_type }, \
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{ NULL } \
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}
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/* Parse the setmtu structure */
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#define NG_NETFLOW_SETMTU_TYPE { \
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{ "mtu", &ng_parse_uint16_type }, \
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{ NULL } \
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}
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/* Parse the v9info structure */
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#define NG_NETFLOW_V9INFO_TYPE { \
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{ "v9 template packets", &ng_parse_uint16_type },\
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{ "v9 template time", &ng_parse_uint16_type },\
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{ "v9 MTU", &ng_parse_uint16_type },\
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{ NULL } \
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}
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/* Private hook data */
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struct ng_netflow_iface {
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hook_p hook; /* NULL when disconnected */
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hook_p out; /* NULL when no bypass hook */
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struct ng_netflow_ifinfo info;
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};
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typedef struct ng_netflow_iface *iface_p;
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typedef struct ng_netflow_ifinfo *ifinfo_p;
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struct netflow_export_item {
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item_p item;
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item_p item9;
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struct netflow_v9_packet_opt *item9_opt;
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};
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/* Structure contatining fib-specific data */
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struct fib_export {
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uint32_t fib; /* kernel fib id */
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/* Various data used for export */
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struct netflow_export_item exp;
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struct mtx export_mtx; /* exp.item mutex */
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struct mtx export9_mtx; /* exp.item9 mutex */
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uint32_t flow_seq; /* current V5 flow sequence */
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uint32_t flow9_seq; /* current V9 flow sequence */
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uint32_t domain_id; /* Observartion domain id */
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/* Netflow V9 counters */
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uint32_t templ_last_ts; /* unixtime of last template announce */
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uint32_t templ_last_pkt; /* packet count on last announce */
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uint32_t sent_packets; /* packets sent by exporter; */
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/* Current packet specific options */
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struct netflow_v9_packet_opt *export9_opt;
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};
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typedef struct fib_export *fib_export_p;
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/* Structure describing our flow engine */
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struct netflow {
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node_p node; /* link to the node itself */
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hook_p export; /* export data goes there */
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hook_p export9; /* Netflow V9 export data goes there */
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struct callout exp_callout; /* expiry periodic job */
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/*
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* Flow entries are allocated in uma(9) zone zone. They are
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* indexed by hash hash. Each hash element consist of tailqueue
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* head and mutex to protect this element.
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*/
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#define CACHESIZE (65536*16)
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#define CACHELOWAT (CACHESIZE * 3/4)
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#define CACHEHIGHWAT (CACHESIZE * 9/10)
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uma_zone_t zone;
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struct flow_hash_entry *hash;
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/*
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* NetFlow data export
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*
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* export_item is a data item, it has an mbuf with cluster
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* attached to it. A thread detaches export_item from priv
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* and works with it. If the export is full it is sent, and
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* a new one is allocated. Before exiting thread re-attaches
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* its current item back to priv. If there is item already,
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* current incomplete datagram is sent.
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* export_mtx is used for attaching/detaching.
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*/
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/* IPv6 support */
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#ifdef INET6
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uma_zone_t zone6;
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struct flow_hash_entry *hash6;
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#endif
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/* Statistics. */
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counter_u64_t nfinfo_bytes; /* accounted IPv4 bytes */
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counter_u64_t nfinfo_packets; /* accounted IPv4 packets */
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counter_u64_t nfinfo_bytes6; /* accounted IPv6 bytes */
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counter_u64_t nfinfo_packets6; /* accounted IPv6 packets */
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counter_u64_t nfinfo_sbytes; /* skipped IPv4 bytes */
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counter_u64_t nfinfo_spackets; /* skipped IPv4 packets */
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counter_u64_t nfinfo_sbytes6; /* skipped IPv6 bytes */
|
|
counter_u64_t nfinfo_spackets6; /* skipped IPv6 packets */
|
|
counter_u64_t nfinfo_act_exp; /* active expiries */
|
|
counter_u64_t nfinfo_inact_exp; /* inactive expiries */
|
|
uint32_t nfinfo_alloc_failed; /* failed allocations */
|
|
uint32_t nfinfo_export_failed; /* failed exports */
|
|
uint32_t nfinfo_export9_failed; /* failed exports */
|
|
uint32_t nfinfo_realloc_mbuf; /* reallocated mbufs */
|
|
uint32_t nfinfo_alloc_fibs; /* fibs allocated */
|
|
uint32_t nfinfo_inact_t; /* flow inactive timeout */
|
|
uint32_t nfinfo_act_t; /* flow active timeout */
|
|
|
|
/* Multiple FIB support */
|
|
fib_export_p *fib_data; /* vector to per-fib data */
|
|
uint16_t maxfibs; /* number of allocated fibs */
|
|
|
|
/* Netflow v9 configuration options */
|
|
/*
|
|
* RFC 3954 clause 7.3
|
|
* "Both options MUST be configurable by the user on the Exporter."
|
|
*/
|
|
uint16_t templ_time; /* time between sending templates */
|
|
uint16_t templ_packets; /* packets between sending templates */
|
|
#define NETFLOW_V9_MAX_FLOWSETS 2
|
|
u_char flowsets_count; /* current flowsets used */
|
|
|
|
/* Count of records in each flowset */
|
|
u_char flowset_records[NETFLOW_V9_MAX_FLOWSETS - 1];
|
|
uint16_t mtu; /* export interface MTU */
|
|
|
|
/* Pointers to pre-compiled flowsets */
|
|
struct netflow_v9_flowset_header
|
|
*v9_flowsets[NETFLOW_V9_MAX_FLOWSETS - 1];
|
|
|
|
struct ng_netflow_iface ifaces[NG_NETFLOW_MAXIFACES];
|
|
};
|
|
|
|
typedef struct netflow *priv_p;
|
|
|
|
/* Header of a small list in hash cell */
|
|
struct flow_hash_entry {
|
|
struct mtx mtx;
|
|
TAILQ_HEAD(fhead, flow_entry) head;
|
|
};
|
|
|
|
#define ERROUT(x) { error = (x); goto done; }
|
|
|
|
#define MTAG_NETFLOW 1221656444
|
|
#define MTAG_NETFLOW_CALLED 0
|
|
|
|
#define m_pktlen(m) ((m)->m_pkthdr.len)
|
|
#define IP6VERSION 6
|
|
|
|
#define priv_to_fib(priv, fib) (priv)->fib_data[(fib)]
|
|
|
|
/*
|
|
* Cisco uses milliseconds for uptime. Bad idea, since it overflows
|
|
* every 48+ days. But we will do same to keep compatibility. This macro
|
|
* does overflowable multiplication to 1000.
|
|
*/
|
|
#define MILLIUPTIME(t) (((t) << 9) + /* 512 */ \
|
|
((t) << 8) + /* 256 */ \
|
|
((t) << 7) + /* 128 */ \
|
|
((t) << 6) + /* 64 */ \
|
|
((t) << 5) + /* 32 */ \
|
|
((t) << 3)) /* 8 */
|
|
|
|
/* Prototypes for netflow.c */
|
|
void ng_netflow_cache_init(priv_p);
|
|
void ng_netflow_cache_flush(priv_p);
|
|
int ng_netflow_fib_init(priv_p priv, int fib);
|
|
void ng_netflow_copyinfo(priv_p, struct ng_netflow_info *);
|
|
void ng_netflow_copyv9info(priv_p, struct ng_netflow_v9info *);
|
|
timeout_t ng_netflow_expire;
|
|
int ng_netflow_flow_add(priv_p, fib_export_p, struct ip *, caddr_t,
|
|
uint8_t, uint8_t, unsigned int);
|
|
int ng_netflow_flow6_add(priv_p, fib_export_p, struct ip6_hdr *, caddr_t,
|
|
uint8_t, uint8_t, unsigned int);
|
|
int ng_netflow_flow_show(priv_p, struct ngnf_show_header *req,
|
|
struct ngnf_show_header *resp);
|
|
void ng_netflow_v9_cache_init(priv_p);
|
|
void ng_netflow_v9_cache_flush(priv_p);
|
|
item_p get_export9_dgram(priv_p, fib_export_p,
|
|
struct netflow_v9_packet_opt **);
|
|
void return_export9_dgram(priv_p, fib_export_p, item_p,
|
|
struct netflow_v9_packet_opt *, int);
|
|
int export9_add(item_p, struct netflow_v9_packet_opt *,
|
|
struct flow_entry *);
|
|
int export9_send(priv_p, fib_export_p, item_p,
|
|
struct netflow_v9_packet_opt *, int);
|
|
|
|
#endif /* _KERNEL */
|
|
#endif /* _NG_NETFLOW_H_ */
|