1 /*- 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> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 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. 15 * 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 26 * SUCH DAMAGE. 27 * 28 * $SourceForge: ng_netflow.h,v 1.26 2004/09/04 15:44:55 glebius Exp $ 29 * $FreeBSD$ 30 */ 31 32 #ifndef _NG_NETFLOW_H_ 33 #define _NG_NETFLOW_H_ 34 35 #define NG_NETFLOW_NODE_TYPE "netflow" 36 #define NGM_NETFLOW_COOKIE 1365756954 37 #define NGM_NETFLOW_V9_COOKIE 1349865386 38 39 #define NG_NETFLOW_MAXIFACES USHRT_MAX 40 41 /* Hook names */ 42 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" 47 48 /* This define effectively disable (v5) netflow export hook! */ 49 /* #define COUNTERS_64 */ 50 51 /* Netgraph commands understood by netflow node */ 52 enum { 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 */ 63 }; 64 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 uint64_t nfinfo_packets; /* accounted IPv4 packets */ 69 uint64_t nfinfo_bytes6; /* accounted IPv6 bytes */ 70 uint64_t nfinfo_packets6; /* accounted IPv6 packets */ 71 uint64_t nfinfo_sbytes; /* skipped IPv4 bytes */ 72 uint64_t nfinfo_spackets; /* skipped IPv4 packets */ 73 uint64_t nfinfo_sbytes6; /* skipped IPv6 bytes */ 74 uint64_t nfinfo_spackets6; /* skipped IPv6 packets */ 75 uint64_t nfinfo_act_exp; /* active expiries */ 76 uint64_t nfinfo_inact_exp; /* inactive expiries */ 77 uint32_t nfinfo_used; /* used cache records */ 78 uint32_t nfinfo_used6; /* used IPv6 cache records */ 79 uint32_t nfinfo_alloc_failed; /* failed allocations */ 80 uint32_t nfinfo_export_failed; /* failed exports */ 81 uint32_t nfinfo_export9_failed; /* failed exports */ 82 uint32_t nfinfo_realloc_mbuf; /* reallocated mbufs */ 83 uint32_t nfinfo_alloc_fibs; /* fibs allocated */ 84 uint32_t nfinfo_inact_t; /* flow inactive timeout */ 85 uint32_t nfinfo_act_t; /* flow active timeout */ 86 }; 87 88 /* Parse the info structure */ 89 #define NG_NETFLOW_INFO_TYPE { \ 90 { "IPv4 bytes", &ng_parse_uint64_type },\ 91 { "IPv4 packets", &ng_parse_uint64_type },\ 92 { "IPv6 bytes", &ng_parse_uint64_type },\ 93 { "IPv6 packets", &ng_parse_uint64_type },\ 94 { "IPv4 skipped bytes", &ng_parse_uint64_type },\ 95 { "IPv4 skipped packets", &ng_parse_uint64_type },\ 96 { "IPv6 skipped bytes", &ng_parse_uint64_type },\ 97 { "IPv6 skipped packets", &ng_parse_uint64_type },\ 98 { "Active expiries", &ng_parse_uint64_type },\ 99 { "Inactive expiries", &ng_parse_uint64_type },\ 100 { "IPv4 records used", &ng_parse_uint32_type },\ 101 { "IPv6 records used", &ng_parse_uint32_type },\ 102 { "Failed allocations", &ng_parse_uint32_type },\ 103 { "V5 failed exports", &ng_parse_uint32_type },\ 104 { "V9 failed exports", &ng_parse_uint32_type },\ 105 { "mbuf reallocations", &ng_parse_uint32_type },\ 106 { "fibs allocated", &ng_parse_uint32_type },\ 107 { "Inactive timeout", &ng_parse_uint32_type },\ 108 { "Active timeout", &ng_parse_uint32_type },\ 109 { NULL } \ 110 } 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 }; 121 122 123 /* This structure is passed to NGM_NETFLOW_SETDLT message */ 124 struct ng_netflow_setdlt { 125 uint16_t iface; /* which iface dlt change */ 126 uint8_t dlt; /* DLT_XXX from bpf.h */ 127 }; 128 129 /* This structure is passed to NGM_NETFLOW_SETIFINDEX */ 130 struct ng_netflow_setifindex { 131 uint16_t iface; /* which iface index change */ 132 uint16_t index; /* new index */ 133 }; 134 135 /* This structure is passed to NGM_NETFLOW_SETTIMEOUTS */ 136 struct ng_netflow_settimeouts { 137 uint32_t inactive_timeout; /* flow inactive timeout */ 138 uint32_t active_timeout; /* flow active timeout */ 139 }; 140 141 #define NG_NETFLOW_CONF_INGRESS 0x01 /* Account on ingress */ 142 #define NG_NETFLOW_CONF_EGRESS 0x02 /* Account on egress */ 143 #define NG_NETFLOW_CONF_ONCE 0x04 /* Add tag to account only once */ 144 #define NG_NETFLOW_CONF_THISONCE 0x08 /* Account once in current node */ 145 #define NG_NETFLOW_CONF_NOSRCLOOKUP 0x10 /* No radix lookup on src */ 146 #define NG_NETFLOW_CONF_NODSTLOOKUP 0x20 /* No radix lookup on dst */ 147 148 #define NG_NETFLOW_IS_FRAG 0x01 149 #define NG_NETFLOW_FLOW_FLAGS (NG_NETFLOW_CONF_NOSRCLOOKUP|\ 150 NG_NETFLOW_CONF_NODSTLOOKUP) 151 152 /* This structure is passed to NGM_NETFLOW_SETCONFIG */ 153 struct ng_netflow_setconfig { 154 uint16_t iface; /* which iface config change */ 155 uint32_t conf; /* new config */ 156 }; 157 158 /* This structure is passed to NGM_NETFLOW_SETTEMPLATE */ 159 struct ng_netflow_settemplate { 160 uint16_t time; /* max time between announce */ 161 uint16_t packets; /* max packets between announce */ 162 }; 163 164 /* This structure is passed to NGM_NETFLOW_SETMTU */ 165 struct ng_netflow_setmtu { 166 uint16_t mtu; /* MTU for packet */ 167 }; 168 169 /* This structure is used in NGM_NETFLOW_SHOW request/response */ 170 struct ngnf_show_header { 171 u_char version; /* IPv4 or IPv6 */ 172 uint32_t hash_id; /* current hash index */ 173 uint32_t list_id; /* current record number in hash */ 174 uint32_t nentries; /* number of records in response */ 175 }; 176 177 /* This structure is used in NGM_NETFLOW_V9INFO message */ 178 struct ng_netflow_v9info { 179 uint16_t templ_packets; /* v9 template packets */ 180 uint16_t templ_time; /* v9 template time */ 181 uint16_t mtu; /* v9 MTU */ 182 }; 183 184 /* XXXGL 185 * Somewhere flow_rec6 is casted to flow_rec, and flow6_entry_data is 186 * casted to flow_entry_data. After casting, fle->r.fib is accessed. 187 * So beginning of these structs up to fib should be kept common. 188 */ 189 190 /* This is unique data, which identifies flow */ 191 struct flow_rec { 192 uint16_t flow_type; 193 uint16_t fib; 194 struct in_addr r_src; 195 struct in_addr r_dst; 196 union { 197 struct { 198 uint16_t s_port; /* source TCP/UDP port */ 199 uint16_t d_port; /* destination TCP/UDP port */ 200 } dir; 201 uint32_t both; 202 } ports; 203 union { 204 struct { 205 u_char prot; /* IP protocol */ 206 u_char tos; /* IP TOS */ 207 uint16_t i_ifx; /* input interface index */ 208 } i; 209 uint32_t all; 210 } misc; 211 }; 212 213 /* This is unique data, which identifies flow */ 214 struct flow6_rec { 215 uint16_t flow_type; 216 uint16_t fib; 217 union { 218 struct in_addr r_src; 219 struct in6_addr r_src6; 220 } src; 221 union { 222 struct in_addr r_dst; 223 struct in6_addr r_dst6; 224 } dst; 225 union { 226 struct { 227 uint16_t s_port; /* source TCP/UDP port */ 228 uint16_t d_port; /* destination TCP/UDP port */ 229 } dir; 230 uint32_t both; 231 } ports; 232 union { 233 struct { 234 u_char prot; /* IP protocol */ 235 u_char tos; /* IP TOS */ 236 uint16_t i_ifx; /* input interface index */ 237 } i; 238 uint32_t all; 239 } misc; 240 }; 241 242 #define r_ip_p misc.i.prot 243 #define r_tos misc.i.tos 244 #define r_i_ifx misc.i.i_ifx 245 #define r_misc misc.all 246 #define r_ports ports.both 247 #define r_sport ports.dir.s_port 248 #define r_dport ports.dir.d_port 249 250 /* A flow entry which accumulates statistics */ 251 struct flow_entry_data { 252 uint16_t version; /* Protocol version */ 253 struct flow_rec r; 254 struct in_addr next_hop; 255 uint16_t fle_o_ifx; /* output interface index */ 256 #define fle_i_ifx r.misc.i.i_ifx 257 uint8_t dst_mask; /* destination route mask bits */ 258 uint8_t src_mask; /* source route mask bits */ 259 u_long packets; 260 u_long bytes; 261 long first; /* uptime on first packet */ 262 long last; /* uptime on last packet */ 263 u_char tcp_flags; /* cumulative OR */ 264 }; 265 266 struct flow6_entry_data { 267 uint16_t version; /* Protocol version */ 268 struct flow6_rec r; 269 union { 270 struct in_addr next_hop; 271 struct in6_addr next_hop6; 272 } n; 273 uint16_t fle_o_ifx; /* output interface index */ 274 #define fle_i_ifx r.misc.i.i_ifx 275 uint8_t dst_mask; /* destination route mask bits */ 276 uint8_t src_mask; /* source route mask bits */ 277 u_long packets; 278 u_long bytes; 279 long first; /* uptime on first packet */ 280 long last; /* uptime on last packet */ 281 u_char tcp_flags; /* cumulative OR */ 282 }; 283 284 /* 285 * How many flow records we will transfer at once 286 * without overflowing socket receive buffer 287 */ 288 #define NREC_AT_ONCE 1000 289 #define NREC6_AT_ONCE (NREC_AT_ONCE * sizeof(struct flow_entry_data) / \ 290 sizeof(struct flow6_entry_data)) 291 #define NGRESP_SIZE (sizeof(struct ngnf_show_header) + (NREC_AT_ONCE * \ 292 sizeof(struct flow_entry_data))) 293 #define SORCVBUF_SIZE (NGRESP_SIZE + 2 * sizeof(struct ng_mesg)) 294 295 /* Everything below is for kernel */ 296 297 #ifdef _KERNEL 298 299 struct flow_entry { 300 TAILQ_ENTRY(flow_entry) fle_hash; /* entries in hash slot */ 301 struct flow_entry_data f; 302 }; 303 304 struct flow6_entry { 305 TAILQ_ENTRY(flow_entry) fle_hash; /* entries in hash slot */ 306 struct flow6_entry_data f; 307 }; 308 /* Parsing declarations */ 309 310 /* Parse the ifinfo structure */ 311 #define NG_NETFLOW_IFINFO_TYPE { \ 312 { "packets", &ng_parse_uint32_type },\ 313 { "data link type", &ng_parse_uint8_type }, \ 314 { "index", &ng_parse_uint16_type },\ 315 { "conf", &ng_parse_uint32_type },\ 316 { NULL } \ 317 } 318 319 /* Parse the setdlt structure */ 320 #define NG_NETFLOW_SETDLT_TYPE { \ 321 { "iface", &ng_parse_uint16_type }, \ 322 { "dlt", &ng_parse_uint8_type }, \ 323 { NULL } \ 324 } 325 326 /* Parse the setifindex structure */ 327 #define NG_NETFLOW_SETIFINDEX_TYPE { \ 328 { "iface", &ng_parse_uint16_type }, \ 329 { "index", &ng_parse_uint16_type }, \ 330 { NULL } \ 331 } 332 333 /* Parse the settimeouts structure */ 334 #define NG_NETFLOW_SETTIMEOUTS_TYPE { \ 335 { "inactive", &ng_parse_uint32_type }, \ 336 { "active", &ng_parse_uint32_type }, \ 337 { NULL } \ 338 } 339 340 /* Parse the setifindex structure */ 341 #define NG_NETFLOW_SETCONFIG_TYPE { \ 342 { "iface", &ng_parse_uint16_type }, \ 343 { "conf", &ng_parse_uint32_type }, \ 344 { NULL } \ 345 } 346 347 /* Parse the settemplate structure */ 348 #define NG_NETFLOW_SETTEMPLATE_TYPE { \ 349 { "time", &ng_parse_uint16_type }, \ 350 { "packets", &ng_parse_uint16_type }, \ 351 { NULL } \ 352 } 353 354 /* Parse the setmtu structure */ 355 #define NG_NETFLOW_SETMTU_TYPE { \ 356 { "mtu", &ng_parse_uint16_type }, \ 357 { NULL } \ 358 } 359 360 /* Parse the v9info structure */ 361 #define NG_NETFLOW_V9INFO_TYPE { \ 362 { "v9 template packets", &ng_parse_uint16_type },\ 363 { "v9 template time", &ng_parse_uint16_type },\ 364 { "v9 MTU", &ng_parse_uint16_type },\ 365 { NULL } \ 366 } 367 368 /* Private hook data */ 369 struct ng_netflow_iface { 370 hook_p hook; /* NULL when disconnected */ 371 hook_p out; /* NULL when no bypass hook */ 372 struct ng_netflow_ifinfo info; 373 }; 374 375 typedef struct ng_netflow_iface *iface_p; 376 typedef struct ng_netflow_ifinfo *ifinfo_p; 377 378 struct netflow_export_item { 379 item_p item; 380 item_p item9; 381 struct netflow_v9_packet_opt *item9_opt; 382 }; 383 384 /* Structure contatining fib-specific data */ 385 struct fib_export { 386 uint32_t fib; /* kernel fib id */ 387 388 /* Various data used for export */ 389 struct netflow_export_item exp; 390 391 struct mtx export_mtx; /* exp.item mutex */ 392 struct mtx export9_mtx; /* exp.item9 mutex */ 393 uint32_t flow_seq; /* current V5 flow sequence */ 394 uint32_t flow9_seq; /* current V9 flow sequence */ 395 uint32_t domain_id; /* Observartion domain id */ 396 /* Netflow V9 counters */ 397 uint32_t templ_last_ts; /* unixtime of last template announce */ 398 uint32_t templ_last_pkt; /* packet count on last announce */ 399 uint32_t sent_packets; /* packets sent by exporter; */ 400 401 /* Current packet specific options */ 402 struct netflow_v9_packet_opt *export9_opt; 403 }; 404 405 typedef struct fib_export *fib_export_p; 406 407 /* Structure describing our flow engine */ 408 struct netflow { 409 node_p node; /* link to the node itself */ 410 hook_p export; /* export data goes there */ 411 hook_p export9; /* Netflow V9 export data goes there */ 412 struct callout exp_callout; /* expiry periodic job */ 413 414 /* 415 * Flow entries are allocated in uma(9) zone zone. They are 416 * indexed by hash hash. Each hash element consist of tailqueue 417 * head and mutex to protect this element. 418 */ 419 #define CACHESIZE (65536*16) 420 #define CACHELOWAT (CACHESIZE * 3/4) 421 #define CACHEHIGHWAT (CACHESIZE * 9/10) 422 uma_zone_t zone; 423 struct flow_hash_entry *hash; 424 425 /* 426 * NetFlow data export 427 * 428 * export_item is a data item, it has an mbuf with cluster 429 * attached to it. A thread detaches export_item from priv 430 * and works with it. If the export is full it is sent, and 431 * a new one is allocated. Before exiting thread re-attaches 432 * its current item back to priv. If there is item already, 433 * current incomplete datagram is sent. 434 * export_mtx is used for attaching/detaching. 435 */ 436 437 /* IPv6 support */ 438 #ifdef INET6 439 uma_zone_t zone6; 440 struct flow_hash_entry *hash6; 441 #endif 442 443 /* Statistics. */ 444 counter_u64_t nfinfo_bytes; /* accounted IPv4 bytes */ 445 counter_u64_t nfinfo_packets; /* accounted IPv4 packets */ 446 counter_u64_t nfinfo_bytes6; /* accounted IPv6 bytes */ 447 counter_u64_t nfinfo_packets6; /* accounted IPv6 packets */ 448 counter_u64_t nfinfo_sbytes; /* skipped IPv4 bytes */ 449 counter_u64_t nfinfo_spackets; /* skipped IPv4 packets */ 450 counter_u64_t nfinfo_sbytes6; /* skipped IPv6 bytes */ 451 counter_u64_t nfinfo_spackets6; /* skipped IPv6 packets */ 452 counter_u64_t nfinfo_act_exp; /* active expiries */ 453 counter_u64_t nfinfo_inact_exp; /* inactive expiries */ 454 uint32_t nfinfo_alloc_failed; /* failed allocations */ 455 uint32_t nfinfo_export_failed; /* failed exports */ 456 uint32_t nfinfo_export9_failed; /* failed exports */ 457 uint32_t nfinfo_realloc_mbuf; /* reallocated mbufs */ 458 uint32_t nfinfo_alloc_fibs; /* fibs allocated */ 459 uint32_t nfinfo_inact_t; /* flow inactive timeout */ 460 uint32_t nfinfo_act_t; /* flow active timeout */ 461 462 /* Multiple FIB support */ 463 fib_export_p *fib_data; /* vector to per-fib data */ 464 uint16_t maxfibs; /* number of allocated fibs */ 465 466 /* Netflow v9 configuration options */ 467 /* 468 * RFC 3954 clause 7.3 469 * "Both options MUST be configurable by the user on the Exporter." 470 */ 471 uint16_t templ_time; /* time between sending templates */ 472 uint16_t templ_packets; /* packets between sending templates */ 473 #define NETFLOW_V9_MAX_FLOWSETS 2 474 u_char flowsets_count; /* current flowsets used */ 475 476 /* Count of records in each flowset */ 477 u_char flowset_records[NETFLOW_V9_MAX_FLOWSETS - 1]; 478 uint16_t mtu; /* export interface MTU */ 479 480 /* Pointers to pre-compiled flowsets */ 481 struct netflow_v9_flowset_header 482 *v9_flowsets[NETFLOW_V9_MAX_FLOWSETS - 1]; 483 484 struct ng_netflow_iface ifaces[NG_NETFLOW_MAXIFACES]; 485 }; 486 487 typedef struct netflow *priv_p; 488 489 /* Header of a small list in hash cell */ 490 struct flow_hash_entry { 491 struct mtx mtx; 492 TAILQ_HEAD(fhead, flow_entry) head; 493 }; 494 495 #define ERROUT(x) { error = (x); goto done; } 496 497 #define MTAG_NETFLOW 1221656444 498 #define MTAG_NETFLOW_CALLED 0 499 500 #define m_pktlen(m) ((m)->m_pkthdr.len) 501 #define IP6VERSION 6 502 503 #define priv_to_fib(priv, fib) (priv)->fib_data[(fib)] 504 505 /* 506 * Cisco uses milliseconds for uptime. Bad idea, since it overflows 507 * every 48+ days. But we will do same to keep compatibility. This macro 508 * does overflowable multiplication to 1000. 509 */ 510 #define MILLIUPTIME(t) (((t) << 9) + /* 512 */ \ 511 ((t) << 8) + /* 256 */ \ 512 ((t) << 7) + /* 128 */ \ 513 ((t) << 6) + /* 64 */ \ 514 ((t) << 5) + /* 32 */ \ 515 ((t) << 3)) /* 8 */ 516 517 /* Prototypes for netflow.c */ 518 void ng_netflow_cache_init(priv_p); 519 void ng_netflow_cache_flush(priv_p); 520 int ng_netflow_fib_init(priv_p priv, int fib); 521 void ng_netflow_copyinfo(priv_p, struct ng_netflow_info *); 522 void ng_netflow_copyv9info(priv_p, struct ng_netflow_v9info *); 523 timeout_t ng_netflow_expire; 524 int ng_netflow_flow_add(priv_p, fib_export_p, struct ip *, caddr_t, 525 uint8_t, uint8_t, unsigned int); 526 int ng_netflow_flow6_add(priv_p, fib_export_p, struct ip6_hdr *, caddr_t, 527 uint8_t, uint8_t, unsigned int); 528 int ng_netflow_flow_show(priv_p, struct ngnf_show_header *req, 529 struct ngnf_show_header *resp); 530 void ng_netflow_v9_cache_init(priv_p); 531 void ng_netflow_v9_cache_flush(priv_p); 532 item_p get_export9_dgram(priv_p, fib_export_p, 533 struct netflow_v9_packet_opt **); 534 void return_export9_dgram(priv_p, fib_export_p, item_p, 535 struct netflow_v9_packet_opt *, int); 536 int export9_add(item_p, struct netflow_v9_packet_opt *, 537 struct flow_entry *); 538 int export9_send(priv_p, fib_export_p, item_p, 539 struct netflow_v9_packet_opt *, int); 540 541 #endif /* _KERNEL */ 542 #endif /* _NG_NETFLOW_H_ */ 543