2 * Copyright (c) 2010-2011 Alexander V. Chernikov <melifaro@ipfw.ru>
3 * Copyright (c) 2004-2005 Gleb Smirnoff <glebius@FreeBSD.org>
4 * Copyright (c) 2001-2003 Roman V. Palagin <romanp@unshadow.net>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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.
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
28 * $SourceForge: ng_netflow.h,v 1.26 2004/09/04 15:44:55 glebius Exp $
32 #ifndef _NG_NETFLOW_H_
33 #define _NG_NETFLOW_H_
35 #define NG_NETFLOW_NODE_TYPE "netflow"
36 #define NGM_NETFLOW_COOKIE 1309868867
37 #define NGM_NETFLOW_V9_COOKIE 1349865386
39 #define NG_NETFLOW_MAXIFACES USHRT_MAX
43 #define NG_NETFLOW_HOOK_DATA "iface"
44 #define NG_NETFLOW_HOOK_OUT "out"
45 #define NG_NETFLOW_HOOK_EXPORT "export"
46 #define NG_NETFLOW_HOOK_EXPORT9 "export9"
48 /* This define effectively disable (v5) netflow export hook! */
49 /* #define COUNTERS_64 */
51 /* Netgraph commands understood by netflow node */
53 NGM_NETFLOW_INFO = 1|NGM_READONLY|NGM_HASREPLY, /* get node info */
54 NGM_NETFLOW_IFINFO = 2|NGM_READONLY|NGM_HASREPLY, /* get iface info */
55 NGM_NETFLOW_SHOW = 3|NGM_READONLY|NGM_HASREPLY, /* show ip cache flow */
56 NGM_NETFLOW_SETDLT = 4, /* set data-link type */
57 NGM_NETFLOW_SETIFINDEX = 5, /* set interface index */
58 NGM_NETFLOW_SETTIMEOUTS = 6, /* set active/inactive flow timeouts */
59 NGM_NETFLOW_SETCONFIG = 7, /* set flow generation options */
60 NGM_NETFLOW_SETTEMPLATE = 8, /* set v9 flow template periodic */
61 NGM_NETFLOW_SETMTU = 9, /* set outgoing interface MTU */
62 NGM_NETFLOW_V9INFO = 10|NGM_READONLY|NGM_HASREPLY, /* get v9 info */
65 /* This structure is returned by the NGM_NETFLOW_INFO message */
66 struct ng_netflow_info {
67 uint64_t nfinfo_bytes; /* accounted IPv4 bytes */
68 uint32_t nfinfo_packets; /* accounted IPv4 packets */
69 uint64_t nfinfo_bytes6; /* accounted IPv6 bytes */
70 uint32_t nfinfo_packets6; /* accounted IPv6 packets */
71 uint64_t nfinfo_sbytes; /* skipped IPv4 bytes */
72 uint32_t nfinfo_spackets; /* skipped IPv4 packets */
73 uint64_t nfinfo_sbytes6; /* skipped IPv6 bytes */
74 uint32_t nfinfo_spackets6; /* skipped IPv6 packets */
75 uint32_t nfinfo_used; /* used cache records */
76 uint32_t nfinfo_used6; /* used IPv6 cache records */
77 uint32_t nfinfo_alloc_failed; /* failed allocations */
78 uint32_t nfinfo_export_failed; /* failed exports */
79 uint32_t nfinfo_export9_failed; /* failed exports */
80 uint32_t nfinfo_realloc_mbuf; /* reallocated mbufs */
81 uint32_t nfinfo_alloc_fibs; /* fibs allocated */
82 uint32_t nfinfo_act_exp; /* active expiries */
83 uint32_t nfinfo_inact_exp; /* inactive expiries */
84 uint32_t nfinfo_inact_t; /* flow inactive timeout */
85 uint32_t nfinfo_act_t; /* flow active timeout */
88 /* This structure is returned by the NGM_NETFLOW_IFINFO message */
89 struct ng_netflow_ifinfo {
90 uint32_t ifinfo_packets; /* number of packets for this iface */
91 uint8_t ifinfo_dlt; /* Data Link Type, DLT_XXX */
92 #define MAXDLTNAMELEN 20
93 u_int16_t ifinfo_index; /* connected iface index */
98 /* This structure is passed to NGM_NETFLOW_SETDLT message */
99 struct ng_netflow_setdlt {
100 uint16_t iface; /* which iface dlt change */
101 uint8_t dlt; /* DLT_XXX from bpf.h */
104 /* This structure is passed to NGM_NETFLOW_SETIFINDEX */
105 struct ng_netflow_setifindex {
106 u_int16_t iface; /* which iface index change */
107 u_int16_t index; /* new index */
110 /* This structure is passed to NGM_NETFLOW_SETTIMEOUTS */
111 struct ng_netflow_settimeouts {
112 uint32_t inactive_timeout; /* flow inactive timeout */
113 uint32_t active_timeout; /* flow active timeout */
116 #define NG_NETFLOW_CONF_INGRESS 1
117 #define NG_NETFLOW_CONF_EGRESS 2
118 #define NG_NETFLOW_CONF_ONCE 4
119 #define NG_NETFLOW_CONF_THISONCE 8
121 /* This structure is passed to NGM_NETFLOW_SETCONFIG */
122 struct ng_netflow_setconfig {
123 u_int16_t iface; /* which iface config change */
124 u_int32_t conf; /* new config */
127 /* This structure is passed to NGM_NETFLOW_SETTEMPLATE */
128 struct ng_netflow_settemplate {
129 uint16_t time; /* max time between announce */
130 uint16_t packets; /* max packets between announce */
133 /* This structure is passed to NGM_NETFLOW_SETMTU */
134 struct ng_netflow_setmtu {
135 uint16_t mtu; /* MTU for packet */
138 /* This structure is used in NGM_NETFLOW_SHOW request/responce */
139 struct ngnf_show_header {
140 u_char version; /* IPv4 or IPv6 */
141 uint32_t hash_id; /* current hash index */
142 uint32_t list_id; /* current record number in given hash */
143 uint32_t nentries; /* number of records in response */
146 /* This structure is used in NGM_NETFLOW_V9INFO message */
147 struct ng_netflow_v9info {
148 uint16_t templ_packets; /* v9 template packets */
149 uint16_t templ_time; /* v9 template time */
150 uint16_t mtu; /* v9 MTU */
154 * Somewhere flow_rec6 is casted to flow_rec, and flow6_entry_data is
155 * casted to flow_entry_data. After casting, fle->r.fib is accessed.
156 * So beginning of these structs up to fib should be kept common.
159 /* This is unique data, which identifies flow */
161 uint16_t flow_type; /* IPv4 L4/L3 flow, see NETFLOW_V9_FLOW* */
163 struct in_addr r_src;
164 struct in_addr r_dst;
167 uint16_t s_port; /* source TCP/UDP port */
168 uint16_t d_port; /* destination TCP/UDP port */
174 u_char prot; /* IP protocol */
175 u_char tos; /* IP TOS */
176 uint16_t i_ifx; /* input interface index */
182 /* This is unique data, which identifies flow */
184 uint16_t flow_type; /* IPv4 L4/L3 Ipv6 L4/L3 flow, see NETFLOW_V9_FLOW* */
187 struct in_addr r_src;
188 struct in6_addr r_src6;
191 struct in_addr r_dst;
192 struct in6_addr r_dst6;
196 uint16_t s_port; /* source TCP/UDP port */
197 uint16_t d_port; /* destination TCP/UDP port */
203 u_char prot; /* IP protocol */
204 u_char tos; /* IP TOS */
205 uint16_t i_ifx; /* input interface index */
211 #define r_ip_p misc.i.prot
212 #define r_tos misc.i.tos
213 #define r_i_ifx misc.i.i_ifx
214 #define r_misc misc.all
215 #define r_ports ports.both
216 #define r_sport ports.dir.s_port
217 #define r_dport ports.dir.d_port
219 /* A flow entry which accumulates statistics */
220 struct flow_entry_data {
221 uint16_t version; /* Protocol version */
223 struct in_addr next_hop;
224 uint16_t fle_o_ifx; /* output interface index */
225 #define fle_i_ifx r.misc.i.i_ifx
226 uint8_t dst_mask; /* destination route mask bits */
227 uint8_t src_mask; /* source route mask bits */
230 long first; /* uptime on first packet */
231 long last; /* uptime on last packet */
232 u_char tcp_flags; /* cumulative OR */
235 struct flow6_entry_data {
236 uint16_t version; /* Protocol version */
239 struct in_addr next_hop;
240 struct in6_addr next_hop6;
242 uint16_t fle_o_ifx; /* output interface index */
243 #define fle_i_ifx r.misc.i.i_ifx
244 uint8_t dst_mask; /* destination route mask bits */
245 uint8_t src_mask; /* source route mask bits */
248 long first; /* uptime on first packet */
249 long last; /* uptime on last packet */
250 u_char tcp_flags; /* cumulative OR */
254 * How many flow records we will transfer at once
255 * without overflowing socket receive buffer
257 #define NREC_AT_ONCE 1000
258 #define NREC6_AT_ONCE (NREC_AT_ONCE * sizeof(struct flow_entry_data) / \
259 sizeof(struct flow6_entry_data))
260 #define NGRESP_SIZE (sizeof(struct ngnf_show_header) + (NREC_AT_ONCE * \
261 sizeof(struct flow_entry_data)))
262 #define SORCVBUF_SIZE (NGRESP_SIZE + 2 * sizeof(struct ng_mesg))
264 /* Everything below is for kernel */
269 TAILQ_ENTRY(flow_entry) fle_hash; /* entries in hash slot */
270 struct flow_entry_data f;
274 TAILQ_ENTRY(flow_entry) fle_hash; /* entries in hash slot */
275 struct flow6_entry_data f;
277 /* Parsing declarations */
279 /* Parse the info structure */
280 #define NG_NETFLOW_INFO_TYPE { \
281 { "IPv4 bytes", &ng_parse_uint64_type }, \
282 { "IPv4 packets", &ng_parse_uint32_type }, \
283 { "IPv6 bytes", &ng_parse_uint64_type }, \
284 { "IPv6 packets", &ng_parse_uint32_type }, \
285 { "IPv4 skipped bytes", &ng_parse_uint64_type }, \
286 { "IPv4 skipped packets", &ng_parse_uint32_type }, \
287 { "IPv6 skipped bytes", &ng_parse_uint64_type }, \
288 { "IPv6 skipped packets", &ng_parse_uint32_type }, \
289 { "IPv4 records used", &ng_parse_uint32_type },\
290 { "IPv6 records used", &ng_parse_uint32_type },\
291 { "Failed allocations", &ng_parse_uint32_type },\
292 { "V5 failed exports", &ng_parse_uint32_type },\
293 { "V9 failed exports", &ng_parse_uint32_type },\
294 { "mbuf reallocations", &ng_parse_uint32_type },\
295 { "fibs allocated", &ng_parse_uint32_type },\
296 { "Active expiries", &ng_parse_uint32_type },\
297 { "Inactive expiries", &ng_parse_uint32_type },\
298 { "Inactive timeout", &ng_parse_uint32_type },\
299 { "Active timeout", &ng_parse_uint32_type },\
303 /* Parse the ifinfo structure */
304 #define NG_NETFLOW_IFINFO_TYPE { \
305 { "packets", &ng_parse_uint32_type }, \
306 { "data link type", &ng_parse_uint8_type }, \
307 { "index", &ng_parse_uint16_type }, \
308 { "conf", &ng_parse_uint32_type }, \
312 /* Parse the setdlt structure */
313 #define NG_NETFLOW_SETDLT_TYPE { \
314 { "iface", &ng_parse_uint16_type }, \
315 { "dlt", &ng_parse_uint8_type }, \
319 /* Parse the setifindex structure */
320 #define NG_NETFLOW_SETIFINDEX_TYPE { \
321 { "iface", &ng_parse_uint16_type }, \
322 { "index", &ng_parse_uint16_type }, \
326 /* Parse the settimeouts structure */
327 #define NG_NETFLOW_SETTIMEOUTS_TYPE { \
328 { "inactive", &ng_parse_uint32_type }, \
329 { "active", &ng_parse_uint32_type }, \
333 /* Parse the setifindex structure */
334 #define NG_NETFLOW_SETCONFIG_TYPE { \
335 { "iface", &ng_parse_uint16_type }, \
336 { "conf", &ng_parse_uint32_type }, \
340 /* Parse the settemplate structure */
341 #define NG_NETFLOW_SETTEMPLATE_TYPE { \
342 { "time", &ng_parse_uint16_type }, \
343 { "packets", &ng_parse_uint16_type }, \
347 /* Parse the setmtu structure */
348 #define NG_NETFLOW_SETMTU_TYPE { \
349 { "mtu", &ng_parse_uint16_type }, \
353 /* Parse the v9info structure */
354 #define NG_NETFLOW_V9INFO_TYPE { \
355 { "v9 template packets", &ng_parse_uint16_type },\
356 { "v9 template time", &ng_parse_uint16_type },\
357 { "v9 MTU", &ng_parse_uint16_type },\
361 /* Private hook data */
362 struct ng_netflow_iface {
363 hook_p hook; /* NULL when disconnected */
364 hook_p out; /* NULL when no bypass hook */
365 struct ng_netflow_ifinfo info;
368 typedef struct ng_netflow_iface *iface_p;
369 typedef struct ng_netflow_ifinfo *ifinfo_p;
371 struct netflow_export_item {
374 struct netflow_v9_packet_opt *item9_opt;
377 /* Structure contatining fib-specific data */
379 uint32_t fib; /* kernel fib id */
380 struct netflow_export_item exp; /* Various data used for export */
381 struct mtx export_mtx; /* exp.item mutex */
382 struct mtx export9_mtx; /* exp.item9 mutex */
383 uint32_t flow_seq; /* current V5 flow sequence */
384 uint32_t flow9_seq; /* current V9 flow sequence */
385 uint32_t domain_id; /* Observartion domain id */
386 /* Netflow V9 counters */
387 uint32_t templ_last_ts; /* unixtime of last template announce */
388 uint32_t templ_last_pkt; /* packets count on last template announce */
389 uint32_t sent_packets; /* packets sent by exporter; */
390 struct netflow_v9_packet_opt *export9_opt; /* current packet specific options */
393 typedef struct fib_export *fib_export_p;
395 /* Structure describing our flow engine */
397 node_p node; /* link to the node itself */
398 hook_p export; /* export data goes there */
399 hook_p export9; /* Netflow V9 export data goes there */
401 struct ng_netflow_info info;
402 struct callout exp_callout; /* expiry periodic job */
405 * Flow entries are allocated in uma(9) zone zone. They are
406 * indexed by hash hash. Each hash element consist of tailqueue
407 * head and mutex to protect this element.
409 #define CACHESIZE (65536*4)
410 #define CACHELOWAT (CACHESIZE * 3/4)
411 #define CACHEHIGHWAT (CACHESIZE * 9/10)
413 struct flow_hash_entry *hash;
416 * NetFlow data export
418 * export_item is a data item, it has an mbuf with cluster
419 * attached to it. A thread detaches export_item from priv
420 * and works with it. If the export is full it is sent, and
421 * a new one is allocated. Before exiting thread re-attaches
422 * its current item back to priv. If there is item already,
423 * current incomplete datagram is sent.
424 * export_mtx is used for attaching/detaching.
430 struct flow_hash_entry *hash6;
432 /* Multiple FIB support */
433 fib_export_p *fib_data; /* array of pointers to per-fib data */
434 uint16_t maxfibs; /* number of allocated fibs */
436 /* Netflow v9 configuration options */
438 * RFC 3954 clause 7.3
439 * "Both options MUST be configurable by the user on the Exporter."
441 uint16_t templ_time; /* time between sending templates */
442 uint16_t templ_packets; /* packets between sending templates */
443 #define NETFLOW_V9_MAX_FLOWSETS 2
444 u_char flowsets_count; /* current flowsets used */
445 u_char flowset_records[NETFLOW_V9_MAX_FLOWSETS - 1]; /* Count of records in each flowset */
446 uint16_t mtu; /* export interface MTU */
447 struct netflow_v9_flowset_header *v9_flowsets[NETFLOW_V9_MAX_FLOWSETS - 1]; /* Pointers to pre-compiled flowsets */
449 struct ng_netflow_iface ifaces[NG_NETFLOW_MAXIFACES];
452 typedef struct netflow *priv_p;
454 /* Header of a small list in hash cell */
455 struct flow_hash_entry {
457 TAILQ_HEAD(fhead, flow_entry) head;
460 #define ERROUT(x) { error = (x); goto done; }
462 #define MTAG_NETFLOW 1221656444
463 #define MTAG_NETFLOW_CALLED 0
465 #define m_pktlen(m) ((m)->m_pkthdr.len)
468 #define priv_to_fib(priv, fib) (priv)->fib_data[(fib)]
471 * Cisco uses milliseconds for uptime. Bad idea, since it overflows
472 * every 48+ days. But we will do same to keep compatibility. This macro
473 * does overflowable multiplication to 1000.
475 #define MILLIUPTIME(t) (((t) << 9) + /* 512 */ \
476 ((t) << 8) + /* 256 */ \
477 ((t) << 7) + /* 128 */ \
478 ((t) << 6) + /* 64 */ \
479 ((t) << 5) + /* 32 */ \
482 /* Prototypes for netflow.c */
483 void ng_netflow_cache_init(priv_p);
484 void ng_netflow_cache_flush(priv_p);
485 int ng_netflow_fib_init(priv_p priv, int fib);
486 void ng_netflow_copyinfo(priv_p, struct ng_netflow_info *);
487 void ng_netflow_copyv9info(priv_p, struct ng_netflow_v9info *);
488 timeout_t ng_netflow_expire;
489 int ng_netflow_flow_add(priv_p, fib_export_p, struct ip *, caddr_t, uint8_t, uint8_t, unsigned int);
490 int ng_netflow_flow6_add(priv_p, fib_export_p, struct ip6_hdr *, caddr_t , uint8_t, uint8_t, unsigned int);
491 int ng_netflow_flow_show(priv_p, struct ngnf_show_header *req, struct ngnf_show_header *resp);
493 void ng_netflow_v9_cache_init(priv_p);
494 void ng_netflow_v9_cache_flush(priv_p);
495 item_p get_export9_dgram(priv_p, fib_export_p, struct netflow_v9_packet_opt **);
496 void return_export9_dgram(priv_p, fib_export_p, item_p,
497 struct netflow_v9_packet_opt *, int);
498 int export9_add(item_p, struct netflow_v9_packet_opt *, struct flow_entry *);
499 int export9_send(priv_p, fib_export_p, item_p, struct netflow_v9_packet_opt *,
503 #endif /* _NG_NETFLOW_H_ */