1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2010-2011 Alexander V. Chernikov <melifaro@ipfw.ru> 5 * Copyright (c) 2004-2005 Gleb Smirnoff <glebius@FreeBSD.org> 6 * Copyright (c) 2001-2003 Roman V. Palagin <romanp@unshadow.net> 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 * $SourceForge: ng_netflow.h,v 1.26 2004/09/04 15:44:55 glebius Exp $ 31 */ 32 33 #ifndef _NG_NETFLOW_H_ 34 #define _NG_NETFLOW_H_ 35 36 #define NG_NETFLOW_NODE_TYPE "netflow" 37 #define NGM_NETFLOW_COOKIE 1365756954 38 #define NGM_NETFLOW_V9_COOKIE 1349865386 39 40 #define NG_NETFLOW_MAXIFACES USHRT_MAX 41 42 /* Hook names */ 43 44 #define NG_NETFLOW_HOOK_DATA "iface" 45 #define NG_NETFLOW_HOOK_OUT "out" 46 #define NG_NETFLOW_HOOK_EXPORT "export" 47 #define NG_NETFLOW_HOOK_EXPORT9 "export9" 48 49 /* This define effectively disable (v5) netflow export hook! */ 50 /* #define COUNTERS_64 */ 51 52 /* Netgraph commands understood by netflow node */ 53 enum { 54 NGM_NETFLOW_INFO = 1|NGM_READONLY|NGM_HASREPLY, /* get node info */ 55 NGM_NETFLOW_IFINFO = 2|NGM_READONLY|NGM_HASREPLY, /* get iface info */ 56 NGM_NETFLOW_SHOW = 3|NGM_READONLY|NGM_HASREPLY, /* show ip cache flow */ 57 NGM_NETFLOW_SETDLT = 4, /* set data-link type */ 58 NGM_NETFLOW_SETIFINDEX = 5, /* set interface index */ 59 NGM_NETFLOW_SETTIMEOUTS = 6, /* set active/inactive flow timeouts */ 60 NGM_NETFLOW_SETCONFIG = 7, /* set flow generation options */ 61 NGM_NETFLOW_SETTEMPLATE = 8, /* set v9 flow template periodic */ 62 NGM_NETFLOW_SETMTU = 9, /* set outgoing interface MTU */ 63 NGM_NETFLOW_V9INFO = 10|NGM_READONLY|NGM_HASREPLY, /* get v9 info */ 64 }; 65 66 /* This structure is returned by the NGM_NETFLOW_INFO message */ 67 struct ng_netflow_info { 68 uint64_t nfinfo_bytes; /* accounted IPv4 bytes */ 69 uint64_t nfinfo_packets; /* accounted IPv4 packets */ 70 uint64_t nfinfo_bytes6; /* accounted IPv6 bytes */ 71 uint64_t nfinfo_packets6; /* accounted IPv6 packets */ 72 uint64_t nfinfo_sbytes; /* skipped IPv4 bytes */ 73 uint64_t nfinfo_spackets; /* skipped IPv4 packets */ 74 uint64_t nfinfo_sbytes6; /* skipped IPv6 bytes */ 75 uint64_t nfinfo_spackets6; /* skipped IPv6 packets */ 76 uint64_t nfinfo_act_exp; /* active expiries */ 77 uint64_t nfinfo_inact_exp; /* inactive expiries */ 78 uint32_t nfinfo_used; /* used cache records */ 79 uint32_t nfinfo_used6; /* used IPv6 cache records */ 80 uint32_t nfinfo_alloc_failed; /* failed allocations */ 81 uint32_t nfinfo_export_failed; /* failed exports */ 82 uint32_t nfinfo_export9_failed; /* failed exports */ 83 uint32_t nfinfo_realloc_mbuf; /* reallocated mbufs */ 84 uint32_t nfinfo_alloc_fibs; /* fibs allocated */ 85 uint32_t nfinfo_inact_t; /* flow inactive timeout */ 86 uint32_t nfinfo_act_t; /* flow active timeout */ 87 }; 88 89 /* Parse the info structure */ 90 #define NG_NETFLOW_INFO_TYPE { \ 91 { "IPv4 bytes", &ng_parse_uint64_type },\ 92 { "IPv4 packets", &ng_parse_uint64_type },\ 93 { "IPv6 bytes", &ng_parse_uint64_type },\ 94 { "IPv6 packets", &ng_parse_uint64_type },\ 95 { "IPv4 skipped bytes", &ng_parse_uint64_type },\ 96 { "IPv4 skipped packets", &ng_parse_uint64_type },\ 97 { "IPv6 skipped bytes", &ng_parse_uint64_type },\ 98 { "IPv6 skipped packets", &ng_parse_uint64_type },\ 99 { "Active expiries", &ng_parse_uint64_type },\ 100 { "Inactive expiries", &ng_parse_uint64_type },\ 101 { "IPv4 records used", &ng_parse_uint32_type },\ 102 { "IPv6 records used", &ng_parse_uint32_type },\ 103 { "Failed allocations", &ng_parse_uint32_type },\ 104 { "V5 failed exports", &ng_parse_uint32_type },\ 105 { "V9 failed exports", &ng_parse_uint32_type },\ 106 { "mbuf reallocations", &ng_parse_uint32_type },\ 107 { "fibs allocated", &ng_parse_uint32_type },\ 108 { "Inactive timeout", &ng_parse_uint32_type },\ 109 { "Active timeout", &ng_parse_uint32_type },\ 110 { NULL } \ 111 } 112 113 /* This structure is returned by the NGM_NETFLOW_IFINFO message */ 114 struct ng_netflow_ifinfo { 115 uint32_t ifinfo_packets; /* number of packets for this iface */ 116 uint8_t ifinfo_dlt; /* Data Link Type, DLT_XXX */ 117 #define MAXDLTNAMELEN 20 118 uint16_t ifinfo_index; /* connected iface index */ 119 uint32_t conf; 120 }; 121 122 /* This structure is passed to NGM_NETFLOW_SETDLT message */ 123 struct ng_netflow_setdlt { 124 uint16_t iface; /* which iface dlt change */ 125 uint8_t dlt; /* DLT_XXX from bpf.h */ 126 }; 127 128 /* This structure is passed to NGM_NETFLOW_SETIFINDEX */ 129 struct ng_netflow_setifindex { 130 uint16_t iface; /* which iface index change */ 131 uint16_t index; /* new index */ 132 }; 133 134 /* This structure is passed to NGM_NETFLOW_SETTIMEOUTS */ 135 struct ng_netflow_settimeouts { 136 uint32_t inactive_timeout; /* flow inactive timeout */ 137 uint32_t active_timeout; /* flow active timeout */ 138 }; 139 140 #define NG_NETFLOW_CONF_INGRESS 0x01 /* Account on ingress */ 141 #define NG_NETFLOW_CONF_EGRESS 0x02 /* Account on egress */ 142 #define NG_NETFLOW_CONF_ONCE 0x04 /* Add tag to account only once */ 143 #define NG_NETFLOW_CONF_THISONCE 0x08 /* Account once in current node */ 144 #define NG_NETFLOW_CONF_NOSRCLOOKUP 0x10 /* No radix lookup on src */ 145 #define NG_NETFLOW_CONF_NODSTLOOKUP 0x20 /* No radix lookup on dst */ 146 147 #define NG_NETFLOW_IS_FRAG 0x01 148 #define NG_NETFLOW_FLOW_FLAGS (NG_NETFLOW_CONF_NOSRCLOOKUP|\ 149 NG_NETFLOW_CONF_NODSTLOOKUP) 150 151 /* This structure is passed to NGM_NETFLOW_SETCONFIG */ 152 struct ng_netflow_setconfig { 153 uint16_t iface; /* which iface config change */ 154 uint32_t conf; /* new config */ 155 }; 156 157 /* This structure is passed to NGM_NETFLOW_SETTEMPLATE */ 158 struct ng_netflow_settemplate { 159 uint16_t time; /* max time between announce */ 160 uint16_t packets; /* max packets between announce */ 161 }; 162 163 /* This structure is passed to NGM_NETFLOW_SETMTU */ 164 struct ng_netflow_setmtu { 165 uint16_t mtu; /* MTU for packet */ 166 }; 167 168 /* This structure is used in NGM_NETFLOW_SHOW request/response */ 169 struct ngnf_show_header { 170 u_char version; /* IPv4 or IPv6 */ 171 uint32_t hash_id; /* current hash index */ 172 uint32_t list_id; /* current record number in hash */ 173 uint32_t nentries; /* number of records in response */ 174 }; 175 176 /* This structure is used in NGM_NETFLOW_V9INFO message */ 177 struct ng_netflow_v9info { 178 uint16_t templ_packets; /* v9 template packets */ 179 uint16_t templ_time; /* v9 template time */ 180 uint16_t mtu; /* v9 MTU */ 181 }; 182 183 /* XXXGL 184 * Somewhere flow_rec6 is casted to flow_rec, and flow6_entry_data is 185 * casted to flow_entry_data. After casting, fle->r.fib is accessed. 186 * So beginning of these structs up to fib should be kept common. 187 */ 188 189 /* This is unique data, which identifies flow */ 190 struct flow_rec { 191 uint16_t flow_type; 192 uint16_t fib; 193 struct in_addr r_src; 194 struct in_addr r_dst; 195 union { 196 struct { 197 uint16_t s_port; /* source TCP/UDP port */ 198 uint16_t d_port; /* destination TCP/UDP port */ 199 } dir; 200 uint32_t both; 201 } ports; 202 union { 203 struct { 204 u_char prot; /* IP protocol */ 205 u_char tos; /* IP TOS */ 206 uint16_t i_ifx; /* input interface index */ 207 } i; 208 uint32_t all; 209 } misc; 210 }; 211 212 /* This is unique data, which identifies flow */ 213 struct flow6_rec { 214 uint16_t flow_type; 215 uint16_t fib; 216 union { 217 struct in_addr r_src; 218 struct in6_addr r_src6; 219 } src; 220 union { 221 struct in_addr r_dst; 222 struct in6_addr r_dst6; 223 } dst; 224 union { 225 struct { 226 uint16_t s_port; /* source TCP/UDP port */ 227 uint16_t d_port; /* destination TCP/UDP port */ 228 } dir; 229 uint32_t both; 230 } ports; 231 union { 232 struct { 233 u_char prot; /* IP protocol */ 234 u_char tos; /* IP TOS */ 235 uint16_t i_ifx; /* input interface index */ 236 } i; 237 uint32_t all; 238 } misc; 239 }; 240 241 #define r_ip_p misc.i.prot 242 #define r_tos misc.i.tos 243 #define r_i_ifx misc.i.i_ifx 244 #define r_misc misc.all 245 #define r_ports ports.both 246 #define r_sport ports.dir.s_port 247 #define r_dport ports.dir.d_port 248 249 /* A flow entry which accumulates statistics */ 250 struct flow_entry_data { 251 uint16_t version; /* Protocol version */ 252 struct flow_rec r; 253 struct in_addr next_hop; 254 uint16_t fle_o_ifx; /* output interface index */ 255 #define fle_i_ifx r.misc.i.i_ifx 256 uint8_t dst_mask; /* destination route mask bits */ 257 uint8_t src_mask; /* source route mask bits */ 258 u_long packets; 259 u_long bytes; 260 long first; /* uptime on first packet */ 261 long last; /* uptime on last packet */ 262 u_char tcp_flags; /* cumulative OR */ 263 }; 264 265 struct flow6_entry_data { 266 uint16_t version; /* Protocol version */ 267 struct flow6_rec r; 268 union { 269 struct in_addr next_hop; 270 struct in6_addr next_hop6; 271 } n; 272 uint16_t fle_o_ifx; /* output interface index */ 273 #define fle_i_ifx r.misc.i.i_ifx 274 uint8_t dst_mask; /* destination route mask bits */ 275 uint8_t src_mask; /* source route mask bits */ 276 u_long packets; 277 u_long bytes; 278 long first; /* uptime on first packet */ 279 long last; /* uptime on last packet */ 280 u_char tcp_flags; /* cumulative OR */ 281 }; 282 283 /* 284 * How many flow records we will transfer at once 285 * without overflowing socket receive buffer 286 */ 287 #define NREC_AT_ONCE 1000 288 #define NREC6_AT_ONCE (NREC_AT_ONCE * sizeof(struct flow_entry_data) / \ 289 sizeof(struct flow6_entry_data)) 290 #define NGRESP_SIZE (sizeof(struct ngnf_show_header) + (NREC_AT_ONCE * \ 291 sizeof(struct flow_entry_data))) 292 #define SORCVBUF_SIZE (NGRESP_SIZE + 2 * sizeof(struct ng_mesg)) 293 294 /* Everything below is for kernel */ 295 296 #ifdef _KERNEL 297 298 struct flow_entry { 299 TAILQ_ENTRY(flow_entry) fle_hash; /* entries in hash slot */ 300 struct flow_entry_data f; 301 }; 302 303 struct flow6_entry { 304 TAILQ_ENTRY(flow_entry) fle_hash; /* entries in hash slot */ 305 struct flow6_entry_data f; 306 }; 307 /* Parsing declarations */ 308 309 /* Parse the ifinfo structure */ 310 #define NG_NETFLOW_IFINFO_TYPE { \ 311 { "packets", &ng_parse_uint32_type },\ 312 { "data link type", &ng_parse_uint8_type }, \ 313 { "index", &ng_parse_uint16_type },\ 314 { "conf", &ng_parse_uint32_type },\ 315 { NULL } \ 316 } 317 318 /* Parse the setdlt structure */ 319 #define NG_NETFLOW_SETDLT_TYPE { \ 320 { "iface", &ng_parse_uint16_type }, \ 321 { "dlt", &ng_parse_uint8_type }, \ 322 { NULL } \ 323 } 324 325 /* Parse the setifindex structure */ 326 #define NG_NETFLOW_SETIFINDEX_TYPE { \ 327 { "iface", &ng_parse_uint16_type }, \ 328 { "index", &ng_parse_uint16_type }, \ 329 { NULL } \ 330 } 331 332 /* Parse the settimeouts structure */ 333 #define NG_NETFLOW_SETTIMEOUTS_TYPE { \ 334 { "inactive", &ng_parse_uint32_type }, \ 335 { "active", &ng_parse_uint32_type }, \ 336 { NULL } \ 337 } 338 339 /* Parse the setifindex structure */ 340 #define NG_NETFLOW_SETCONFIG_TYPE { \ 341 { "iface", &ng_parse_uint16_type }, \ 342 { "conf", &ng_parse_uint32_type }, \ 343 { NULL } \ 344 } 345 346 /* Parse the settemplate structure */ 347 #define NG_NETFLOW_SETTEMPLATE_TYPE { \ 348 { "time", &ng_parse_uint16_type }, \ 349 { "packets", &ng_parse_uint16_type }, \ 350 { NULL } \ 351 } 352 353 /* Parse the setmtu structure */ 354 #define NG_NETFLOW_SETMTU_TYPE { \ 355 { "mtu", &ng_parse_uint16_type }, \ 356 { NULL } \ 357 } 358 359 /* Parse the v9info structure */ 360 #define NG_NETFLOW_V9INFO_TYPE { \ 361 { "v9 template packets", &ng_parse_uint16_type },\ 362 { "v9 template time", &ng_parse_uint16_type },\ 363 { "v9 MTU", &ng_parse_uint16_type },\ 364 { NULL } \ 365 } 366 367 /* Private hook data */ 368 struct ng_netflow_iface { 369 hook_p hook; /* NULL when disconnected */ 370 hook_p out; /* NULL when no bypass hook */ 371 struct ng_netflow_ifinfo info; 372 }; 373 374 typedef struct ng_netflow_iface *iface_p; 375 typedef struct ng_netflow_ifinfo *ifinfo_p; 376 377 struct netflow_export_item { 378 item_p item; 379 item_p item9; 380 struct netflow_v9_packet_opt *item9_opt; 381 }; 382 383 /* Structure contatining fib-specific data */ 384 struct fib_export { 385 uint32_t fib; /* kernel fib id */ 386 387 /* Various data used for export */ 388 struct netflow_export_item exp; 389 390 struct mtx export_mtx; /* exp.item mutex */ 391 struct mtx export9_mtx; /* exp.item9 mutex */ 392 uint32_t flow_seq; /* current V5 flow sequence */ 393 uint32_t flow9_seq; /* current V9 flow sequence */ 394 uint32_t domain_id; /* Observartion domain id */ 395 /* Netflow V9 counters */ 396 uint32_t templ_last_ts; /* unixtime of last template announce */ 397 uint32_t templ_last_pkt; /* packet count on last announce */ 398 uint32_t sent_packets; /* packets sent by exporter; */ 399 400 /* Current packet specific options */ 401 struct netflow_v9_packet_opt *export9_opt; 402 }; 403 404 typedef struct fib_export *fib_export_p; 405 406 /* Structure describing our flow engine */ 407 struct netflow { 408 node_p node; /* link to the node itself */ 409 hook_p export; /* export data goes there */ 410 hook_p export9; /* Netflow V9 export data goes there */ 411 struct callout exp_callout; /* expiry periodic job */ 412 413 /* 414 * Flow entries are allocated in uma(9) zone zone. They are 415 * indexed by hash hash. Each hash element consist of tailqueue 416 * head and mutex to protect this element. 417 */ 418 #define CACHESIZE (65536*16) 419 #define CACHELOWAT (CACHESIZE * 3/4) 420 #define CACHEHIGHWAT (CACHESIZE * 9/10) 421 uma_zone_t zone; 422 struct flow_hash_entry *hash; 423 424 /* 425 * NetFlow data export 426 * 427 * export_item is a data item, it has an mbuf with cluster 428 * attached to it. A thread detaches export_item from priv 429 * and works with it. If the export is full it is sent, and 430 * a new one is allocated. Before exiting thread re-attaches 431 * its current item back to priv. If there is item already, 432 * current incomplete datagram is sent. 433 * export_mtx is used for attaching/detaching. 434 */ 435 436 /* IPv6 support */ 437 #ifdef INET6 438 uma_zone_t zone6; 439 struct flow_hash_entry *hash6; 440 #endif 441 442 /* Statistics. */ 443 counter_u64_t nfinfo_bytes; /* accounted IPv4 bytes */ 444 counter_u64_t nfinfo_packets; /* accounted IPv4 packets */ 445 counter_u64_t nfinfo_bytes6; /* accounted IPv6 bytes */ 446 counter_u64_t nfinfo_packets6; /* accounted IPv6 packets */ 447 counter_u64_t nfinfo_sbytes; /* skipped IPv4 bytes */ 448 counter_u64_t nfinfo_spackets; /* skipped IPv4 packets */ 449 counter_u64_t nfinfo_sbytes6; /* skipped IPv6 bytes */ 450 counter_u64_t nfinfo_spackets6; /* skipped IPv6 packets */ 451 counter_u64_t nfinfo_act_exp; /* active expiries */ 452 counter_u64_t nfinfo_inact_exp; /* inactive expiries */ 453 uint32_t nfinfo_alloc_failed; /* failed allocations */ 454 uint32_t nfinfo_export_failed; /* failed exports */ 455 uint32_t nfinfo_export9_failed; /* failed exports */ 456 uint32_t nfinfo_realloc_mbuf; /* reallocated mbufs */ 457 uint32_t nfinfo_alloc_fibs; /* fibs allocated */ 458 uint32_t nfinfo_inact_t; /* flow inactive timeout */ 459 uint32_t nfinfo_act_t; /* flow active timeout */ 460 461 /* Multiple FIB support */ 462 fib_export_p *fib_data; /* vector to per-fib data */ 463 uint16_t maxfibs; /* number of allocated fibs */ 464 465 /* Netflow v9 configuration options */ 466 /* 467 * RFC 3954 clause 7.3 468 * "Both options MUST be configurable by the user on the Exporter." 469 */ 470 uint16_t templ_time; /* time between sending templates */ 471 uint16_t templ_packets; /* packets between sending templates */ 472 #define NETFLOW_V9_MAX_FLOWSETS 2 473 u_char flowsets_count; /* current flowsets used */ 474 475 /* Count of records in each flowset */ 476 u_char flowset_records[NETFLOW_V9_MAX_FLOWSETS - 1]; 477 uint16_t mtu; /* export interface MTU */ 478 479 /* Pointers to pre-compiled flowsets */ 480 struct netflow_v9_flowset_header 481 *v9_flowsets[NETFLOW_V9_MAX_FLOWSETS - 1]; 482 483 struct ng_netflow_iface ifaces[NG_NETFLOW_MAXIFACES]; 484 }; 485 486 typedef struct netflow *priv_p; 487 488 /* Header of a small list in hash cell */ 489 struct flow_hash_entry { 490 struct mtx mtx; 491 TAILQ_HEAD(fhead, flow_entry) head; 492 }; 493 #define ERROUT(x) { error = (x); goto done; } 494 495 #define MTAG_NETFLOW 1221656444 496 #define MTAG_NETFLOW_CALLED 0 497 498 #define m_pktlen(m) ((m)->m_pkthdr.len) 499 #define IP6VERSION 6 500 501 #define priv_to_fib(priv, fib) (priv)->fib_data[(fib)] 502 503 /* 504 * Cisco uses milliseconds for uptime. Bad idea, since it overflows 505 * every 48+ days. But we will do same to keep compatibility. This macro 506 * does overflowable multiplication to 1000. 507 */ 508 #define MILLIUPTIME(t) (((t) << 9) + /* 512 */ \ 509 ((t) << 8) + /* 256 */ \ 510 ((t) << 7) + /* 128 */ \ 511 ((t) << 6) + /* 64 */ \ 512 ((t) << 5) + /* 32 */ \ 513 ((t) << 3)) /* 8 */ 514 515 /* Prototypes for netflow.c */ 516 void ng_netflow_cache_init(priv_p); 517 void ng_netflow_cache_flush(priv_p); 518 int ng_netflow_fib_init(priv_p priv, int fib); 519 void ng_netflow_copyinfo(priv_p, struct ng_netflow_info *); 520 void ng_netflow_copyv9info(priv_p, struct ng_netflow_v9info *); 521 callout_func_t ng_netflow_expire; 522 int ng_netflow_flow_add(priv_p, fib_export_p, struct ip *, caddr_t, 523 uint8_t, uint8_t, unsigned int); 524 int ng_netflow_flow6_add(priv_p, fib_export_p, struct ip6_hdr *, caddr_t, 525 uint8_t, uint8_t, unsigned int); 526 int ng_netflow_flow_show(priv_p, struct ngnf_show_header *req, 527 struct ngnf_show_header *resp); 528 void ng_netflow_v9_cache_init(priv_p); 529 void ng_netflow_v9_cache_flush(priv_p); 530 item_p get_export9_dgram(priv_p, fib_export_p, 531 struct netflow_v9_packet_opt **); 532 void return_export9_dgram(priv_p, fib_export_p, item_p, 533 struct netflow_v9_packet_opt *, int); 534 int export9_add(item_p, struct netflow_v9_packet_opt *, 535 struct flow_entry *); 536 int export9_send(priv_p, fib_export_p, item_p, 537 struct netflow_v9_packet_opt *, int); 538 539 #endif /* _KERNEL */ 540 #endif /* _NG_NETFLOW_H_ */ 541