1 /* $OpenBSD: if_pflow.c,v 1.70 2017/01/23 11:37:29 mpi Exp $ */ 2 3 /* 4 * Copyright (c) 2011 Florian Obser <florian@narrans.de> 5 * Copyright (c) 2011 Sebastian Benoit <benoit-lists@fb12.de> 6 * Copyright (c) 2008 Henning Brauer <henning@openbsd.org> 7 * Copyright (c) 2008 Joerg Goltermann <jg@osn.de> 8 * 9 * Permission to use, copy, modify, and distribute this software for any 10 * purpose with or without fee is hereby granted, provided that the above 11 * copyright notice and this permission notice appear in all copies. 12 * 13 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 14 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 15 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 16 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 17 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER IN 18 * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT 19 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 20 */ 21 22 #include <sys/types.h> 23 #include <sys/malloc.h> 24 #include <sys/param.h> 25 #include <sys/systm.h> 26 #include <sys/mbuf.h> 27 #include <sys/socket.h> 28 #include <sys/timeout.h> 29 #include <sys/ioctl.h> 30 #include <sys/kernel.h> 31 #include <sys/socket.h> 32 #include <sys/socketvar.h> 33 #include <sys/sysctl.h> 34 35 #include <net/if.h> 36 #include <net/if_types.h> 37 #include <net/bpf.h> 38 #include <net/route.h> 39 #include <netinet/in.h> 40 #include <netinet/if_ether.h> 41 #include <netinet/tcp.h> 42 43 #include <netinet/ip.h> 44 #include <netinet/ip_var.h> 45 #include <netinet/udp.h> 46 #include <netinet/udp_var.h> 47 #include <netinet/in_pcb.h> 48 49 #include <net/pfvar.h> 50 #include <net/if_pflow.h> 51 52 #include "bpfilter.h" 53 #include "pflow.h" 54 55 #define PFLOW_MINMTU \ 56 (sizeof(struct pflow_header) + sizeof(struct pflow_flow)) 57 58 #ifdef PFLOWDEBUG 59 #define DPRINTF(x) do { printf x ; } while (0) 60 #else 61 #define DPRINTF(x) 62 #endif 63 64 SLIST_HEAD(, pflow_softc) pflowif_list; 65 struct pflowstats pflowstats; 66 67 void pflowattach(int); 68 int pflow_output(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst, 69 struct rtentry *rt); 70 int pflow_clone_create(struct if_clone *, int); 71 int pflow_clone_destroy(struct ifnet *); 72 int pflow_set(struct pflow_softc *, struct pflowreq *); 73 void pflow_init_timeouts(struct pflow_softc *); 74 int pflow_calc_mtu(struct pflow_softc *, int, int); 75 void pflow_setmtu(struct pflow_softc *, int); 76 int pflowvalidsockaddr(const struct sockaddr *, int); 77 int pflowioctl(struct ifnet *, u_long, caddr_t); 78 79 struct mbuf *pflow_get_mbuf(struct pflow_softc *, u_int16_t); 80 void pflow_flush(struct pflow_softc *); 81 int pflow_sendout_v5(struct pflow_softc *); 82 int pflow_sendout_ipfix(struct pflow_softc *, sa_family_t); 83 int pflow_sendout_ipfix_tmpl(struct pflow_softc *); 84 int pflow_sendout_mbuf(struct pflow_softc *, struct mbuf *); 85 void pflow_timeout(void *); 86 void pflow_timeout6(void *); 87 void pflow_timeout_tmpl(void *); 88 void copy_flow_data(struct pflow_flow *, struct pflow_flow *, 89 struct pf_state *, struct pf_state_key *, int, int); 90 void copy_flow_ipfix_4_data(struct pflow_ipfix_flow4 *, 91 struct pflow_ipfix_flow4 *, struct pf_state *, struct pf_state_key *, 92 struct pflow_softc *, int, int); 93 void copy_flow_ipfix_6_data(struct pflow_ipfix_flow6 *, 94 struct pflow_ipfix_flow6 *, struct pf_state *, struct pf_state_key *, 95 struct pflow_softc *, int, int); 96 int pflow_pack_flow(struct pf_state *, struct pf_state_key *, 97 struct pflow_softc *); 98 int pflow_pack_flow_ipfix(struct pf_state *, struct pf_state_key *, 99 struct pflow_softc *); 100 int export_pflow_if(struct pf_state*, struct pf_state_key *, 101 struct pflow_softc *); 102 int copy_flow_to_m(struct pflow_flow *flow, struct pflow_softc *sc); 103 int copy_flow_ipfix_4_to_m(struct pflow_ipfix_flow4 *flow, 104 struct pflow_softc *sc); 105 int copy_flow_ipfix_6_to_m(struct pflow_ipfix_flow6 *flow, 106 struct pflow_softc *sc); 107 108 struct if_clone pflow_cloner = 109 IF_CLONE_INITIALIZER("pflow", pflow_clone_create, 110 pflow_clone_destroy); 111 112 void 113 pflowattach(int npflow) 114 { 115 SLIST_INIT(&pflowif_list); 116 if_clone_attach(&pflow_cloner); 117 } 118 119 int 120 pflow_output(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst, 121 struct rtentry *rt) 122 { 123 m_freem(m); /* drop packet */ 124 return (EAFNOSUPPORT); 125 } 126 127 int 128 pflow_clone_create(struct if_clone *ifc, int unit) 129 { 130 struct ifnet *ifp; 131 struct pflow_softc *pflowif; 132 133 if ((pflowif = malloc(sizeof(*pflowif), 134 M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL) 135 return (ENOMEM); 136 137 MGET(pflowif->send_nam, M_WAIT, MT_SONAME); 138 139 pflowif->sc_version = PFLOW_PROTO_DEFAULT; 140 141 /* ipfix template init */ 142 bzero(&pflowif->sc_tmpl_ipfix,sizeof(pflowif->sc_tmpl_ipfix)); 143 pflowif->sc_tmpl_ipfix.set_header.set_id = 144 htons(PFLOW_IPFIX_TMPL_SET_ID); 145 pflowif->sc_tmpl_ipfix.set_header.set_length = 146 htons(sizeof(struct pflow_ipfix_tmpl)); 147 148 /* ipfix IPv4 template */ 149 pflowif->sc_tmpl_ipfix.ipv4_tmpl.h.tmpl_id = 150 htons(PFLOW_IPFIX_TMPL_IPV4_ID); 151 pflowif->sc_tmpl_ipfix.ipv4_tmpl.h.field_count 152 = htons(PFLOW_IPFIX_TMPL_IPV4_FIELD_COUNT); 153 pflowif->sc_tmpl_ipfix.ipv4_tmpl.src_ip.field_id = 154 htons(PFIX_IE_sourceIPv4Address); 155 pflowif->sc_tmpl_ipfix.ipv4_tmpl.src_ip.len = htons(4); 156 pflowif->sc_tmpl_ipfix.ipv4_tmpl.dest_ip.field_id = 157 htons(PFIX_IE_destinationIPv4Address); 158 pflowif->sc_tmpl_ipfix.ipv4_tmpl.dest_ip.len = htons(4); 159 pflowif->sc_tmpl_ipfix.ipv4_tmpl.if_index_in.field_id = 160 htons(PFIX_IE_ingressInterface); 161 pflowif->sc_tmpl_ipfix.ipv4_tmpl.if_index_in.len = htons(4); 162 pflowif->sc_tmpl_ipfix.ipv4_tmpl.if_index_out.field_id = 163 htons(PFIX_IE_egressInterface); 164 pflowif->sc_tmpl_ipfix.ipv4_tmpl.if_index_out.len = htons(4); 165 pflowif->sc_tmpl_ipfix.ipv4_tmpl.packets.field_id = 166 htons(PFIX_IE_packetDeltaCount); 167 pflowif->sc_tmpl_ipfix.ipv4_tmpl.packets.len = htons(8); 168 pflowif->sc_tmpl_ipfix.ipv4_tmpl.octets.field_id = 169 htons(PFIX_IE_octetDeltaCount); 170 pflowif->sc_tmpl_ipfix.ipv4_tmpl.octets.len = htons(8); 171 pflowif->sc_tmpl_ipfix.ipv4_tmpl.start.field_id = 172 htons(PFIX_IE_flowStartMilliseconds); 173 pflowif->sc_tmpl_ipfix.ipv4_tmpl.start.len = htons(8); 174 pflowif->sc_tmpl_ipfix.ipv4_tmpl.finish.field_id = 175 htons(PFIX_IE_flowEndMilliseconds); 176 pflowif->sc_tmpl_ipfix.ipv4_tmpl.finish.len = htons(8); 177 pflowif->sc_tmpl_ipfix.ipv4_tmpl.src_port.field_id = 178 htons(PFIX_IE_sourceTransportPort); 179 pflowif->sc_tmpl_ipfix.ipv4_tmpl.src_port.len = htons(2); 180 pflowif->sc_tmpl_ipfix.ipv4_tmpl.dest_port.field_id = 181 htons(PFIX_IE_destinationTransportPort); 182 pflowif->sc_tmpl_ipfix.ipv4_tmpl.dest_port.len = htons(2); 183 pflowif->sc_tmpl_ipfix.ipv4_tmpl.tos.field_id = 184 htons(PFIX_IE_ipClassOfService); 185 pflowif->sc_tmpl_ipfix.ipv4_tmpl.tos.len = htons(1); 186 pflowif->sc_tmpl_ipfix.ipv4_tmpl.protocol.field_id = 187 htons(PFIX_IE_protocolIdentifier); 188 pflowif->sc_tmpl_ipfix.ipv4_tmpl.protocol.len = htons(1); 189 190 /* ipfix IPv6 template */ 191 pflowif->sc_tmpl_ipfix.ipv6_tmpl.h.tmpl_id = 192 htons(PFLOW_IPFIX_TMPL_IPV6_ID); 193 pflowif->sc_tmpl_ipfix.ipv6_tmpl.h.field_count = 194 htons(PFLOW_IPFIX_TMPL_IPV6_FIELD_COUNT); 195 pflowif->sc_tmpl_ipfix.ipv6_tmpl.src_ip.field_id = 196 htons(PFIX_IE_sourceIPv6Address); 197 pflowif->sc_tmpl_ipfix.ipv6_tmpl.src_ip.len = htons(16); 198 pflowif->sc_tmpl_ipfix.ipv6_tmpl.dest_ip.field_id = 199 htons(PFIX_IE_destinationIPv6Address); 200 pflowif->sc_tmpl_ipfix.ipv6_tmpl.dest_ip.len = htons(16); 201 pflowif->sc_tmpl_ipfix.ipv6_tmpl.if_index_in.field_id = 202 htons(PFIX_IE_ingressInterface); 203 pflowif->sc_tmpl_ipfix.ipv6_tmpl.if_index_in.len = htons(4); 204 pflowif->sc_tmpl_ipfix.ipv6_tmpl.if_index_out.field_id = 205 htons(PFIX_IE_egressInterface); 206 pflowif->sc_tmpl_ipfix.ipv6_tmpl.if_index_out.len = htons(4); 207 pflowif->sc_tmpl_ipfix.ipv6_tmpl.packets.field_id = 208 htons(PFIX_IE_packetDeltaCount); 209 pflowif->sc_tmpl_ipfix.ipv6_tmpl.packets.len = htons(8); 210 pflowif->sc_tmpl_ipfix.ipv6_tmpl.octets.field_id = 211 htons(PFIX_IE_octetDeltaCount); 212 pflowif->sc_tmpl_ipfix.ipv6_tmpl.octets.len = htons(8); 213 pflowif->sc_tmpl_ipfix.ipv6_tmpl.start.field_id = 214 htons(PFIX_IE_flowStartMilliseconds); 215 pflowif->sc_tmpl_ipfix.ipv6_tmpl.start.len = htons(8); 216 pflowif->sc_tmpl_ipfix.ipv6_tmpl.finish.field_id = 217 htons(PFIX_IE_flowEndMilliseconds); 218 pflowif->sc_tmpl_ipfix.ipv6_tmpl.finish.len = htons(8); 219 pflowif->sc_tmpl_ipfix.ipv6_tmpl.src_port.field_id = 220 htons(PFIX_IE_sourceTransportPort); 221 pflowif->sc_tmpl_ipfix.ipv6_tmpl.src_port.len = htons(2); 222 pflowif->sc_tmpl_ipfix.ipv6_tmpl.dest_port.field_id = 223 htons(PFIX_IE_destinationTransportPort); 224 pflowif->sc_tmpl_ipfix.ipv6_tmpl.dest_port.len = htons(2); 225 pflowif->sc_tmpl_ipfix.ipv6_tmpl.tos.field_id = 226 htons(PFIX_IE_ipClassOfService); 227 pflowif->sc_tmpl_ipfix.ipv6_tmpl.tos.len = htons(1); 228 pflowif->sc_tmpl_ipfix.ipv6_tmpl.protocol.field_id = 229 htons(PFIX_IE_protocolIdentifier); 230 pflowif->sc_tmpl_ipfix.ipv6_tmpl.protocol.len = htons(1); 231 232 ifp = &pflowif->sc_if; 233 snprintf(ifp->if_xname, sizeof ifp->if_xname, "pflow%d", unit); 234 ifp->if_softc = pflowif; 235 ifp->if_ioctl = pflowioctl; 236 ifp->if_output = pflow_output; 237 ifp->if_start = NULL; 238 ifp->if_xflags = IFXF_CLONED; 239 ifp->if_type = IFT_PFLOW; 240 IFQ_SET_MAXLEN(&ifp->if_snd, IFQ_MAXLEN); 241 ifp->if_hdrlen = PFLOW_HDRLEN; 242 ifp->if_flags = IFF_UP; 243 ifp->if_flags &= ~IFF_RUNNING; /* not running, need receiver */ 244 pflow_setmtu(pflowif, ETHERMTU); 245 pflow_init_timeouts(pflowif); 246 if_attach(ifp); 247 if_alloc_sadl(ifp); 248 249 /* Insert into list of pflows */ 250 SLIST_INSERT_HEAD(&pflowif_list, pflowif, sc_next); 251 return (0); 252 } 253 254 int 255 pflow_clone_destroy(struct ifnet *ifp) 256 { 257 struct pflow_softc *sc = ifp->if_softc; 258 int s, error; 259 260 error = 0; 261 262 s = splnet(); 263 if (timeout_initialized(&sc->sc_tmo)) 264 timeout_del(&sc->sc_tmo); 265 if (timeout_initialized(&sc->sc_tmo6)) 266 timeout_del(&sc->sc_tmo6); 267 if (timeout_initialized(&sc->sc_tmo_tmpl)) 268 timeout_del(&sc->sc_tmo_tmpl); 269 pflow_flush(sc); 270 m_freem(sc->send_nam); 271 if (sc->so != NULL) { 272 error = soclose(sc->so); 273 sc->so = NULL; 274 } 275 if (sc->sc_flowdst != NULL) 276 free(sc->sc_flowdst, M_DEVBUF, sc->sc_flowdst->sa_len); 277 if (sc->sc_flowsrc != NULL) 278 free(sc->sc_flowsrc, M_DEVBUF, sc->sc_flowsrc->sa_len); 279 if_detach(ifp); 280 SLIST_REMOVE(&pflowif_list, sc, pflow_softc, sc_next); 281 free(sc, M_DEVBUF, sizeof(*sc)); 282 splx(s); 283 return (error); 284 } 285 286 int 287 pflowvalidsockaddr(const struct sockaddr *sa, int ignore_port) 288 { 289 struct sockaddr_in6 *sin6; 290 struct sockaddr_in *sin; 291 292 if (sa == NULL) 293 return (0); 294 switch(sa->sa_family) { 295 case AF_INET: 296 sin = (struct sockaddr_in*) sa; 297 return (sin->sin_addr.s_addr != INADDR_ANY && 298 (ignore_port || sin->sin_port != 0)); 299 case AF_INET6: 300 sin6 = (struct sockaddr_in6*) sa; 301 return (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) && 302 (ignore_port || sin6->sin6_port != 0)); 303 default: 304 return (0); 305 } 306 } 307 308 int 309 pflow_set(struct pflow_softc *sc, struct pflowreq *pflowr) 310 { 311 struct proc *p = curproc; 312 struct socket *so; 313 struct sockaddr *sa; 314 int error = 0; 315 316 if (pflowr->addrmask & PFLOW_MASK_VERSION) { 317 switch(pflowr->version) { 318 case PFLOW_PROTO_5: 319 case PFLOW_PROTO_10: 320 break; 321 default: 322 return(EINVAL); 323 } 324 } 325 326 pflow_flush(sc); 327 328 if (pflowr->addrmask & PFLOW_MASK_DSTIP) { 329 if (sc->sc_flowdst != NULL && 330 sc->sc_flowdst->sa_family != pflowr->flowdst.ss_family) { 331 free(sc->sc_flowdst, M_DEVBUF, sc->sc_flowdst->sa_len); 332 sc->sc_flowdst = NULL; 333 if (sc->so != NULL) { 334 soclose(sc->so); 335 sc->so = NULL; 336 } 337 } 338 339 switch (pflowr->flowdst.ss_family) { 340 case AF_INET: 341 if (sc->sc_flowdst == NULL) { 342 if ((sc->sc_flowdst = malloc( 343 sizeof(struct sockaddr_in), 344 M_DEVBUF, M_NOWAIT)) == NULL) 345 return (ENOMEM); 346 } 347 memcpy(sc->sc_flowdst, &pflowr->flowdst, 348 sizeof(struct sockaddr_in)); 349 sc->sc_flowdst->sa_len = sizeof(struct 350 sockaddr_in); 351 break; 352 case AF_INET6: 353 if (sc->sc_flowdst == NULL) { 354 if ((sc->sc_flowdst = malloc( 355 sizeof(struct sockaddr_in6), 356 M_DEVBUF, M_NOWAIT)) == NULL) 357 return (ENOMEM); 358 } 359 memcpy(sc->sc_flowdst, &pflowr->flowdst, 360 sizeof(struct sockaddr_in6)); 361 sc->sc_flowdst->sa_len = sizeof(struct 362 sockaddr_in6); 363 break; 364 default: 365 break; 366 } 367 368 if (sc->sc_flowdst != NULL) { 369 sc->send_nam->m_len = sc->sc_flowdst->sa_len; 370 sa = mtod(sc->send_nam, struct sockaddr *); 371 memcpy(sa, sc->sc_flowdst, sc->sc_flowdst->sa_len); 372 } 373 } 374 375 if (pflowr->addrmask & PFLOW_MASK_SRCIP) { 376 if (sc->sc_flowsrc != NULL) 377 free(sc->sc_flowsrc, M_DEVBUF, sc->sc_flowsrc->sa_len); 378 sc->sc_flowsrc = NULL; 379 if (sc->so != NULL) { 380 soclose(sc->so); 381 sc->so = NULL; 382 } 383 switch(pflowr->flowsrc.ss_family) { 384 case AF_INET: 385 if ((sc->sc_flowsrc = malloc( 386 sizeof(struct sockaddr_in), 387 M_DEVBUF, M_NOWAIT)) == NULL) 388 return (ENOMEM); 389 memcpy(sc->sc_flowsrc, &pflowr->flowsrc, 390 sizeof(struct sockaddr_in)); 391 sc->sc_flowsrc->sa_len = sizeof(struct 392 sockaddr_in); 393 break; 394 case AF_INET6: 395 if ((sc->sc_flowsrc = malloc( 396 sizeof(struct sockaddr_in6), 397 M_DEVBUF, M_NOWAIT)) == NULL) 398 return (ENOMEM); 399 memcpy(sc->sc_flowsrc, &pflowr->flowsrc, 400 sizeof(struct sockaddr_in6)); 401 sc->sc_flowsrc->sa_len = sizeof(struct 402 sockaddr_in6); 403 break; 404 default: 405 break; 406 } 407 } 408 409 if (sc->so == NULL) { 410 if (pflowvalidsockaddr(sc->sc_flowdst, 0)) { 411 error = socreate(sc->sc_flowdst->sa_family, 412 &so, SOCK_DGRAM, 0); 413 if (error) 414 return (error); 415 if (pflowvalidsockaddr(sc->sc_flowsrc, 1)) { 416 struct mbuf *m; 417 418 MGET(m, M_WAIT, MT_SONAME); 419 m->m_len = sc->sc_flowsrc->sa_len; 420 sa = mtod(m, struct sockaddr *); 421 memcpy(sa, sc->sc_flowsrc, 422 sc->sc_flowsrc->sa_len); 423 424 error = sobind(so, m, p); 425 m_freem(m); 426 if (error) { 427 soclose(so); 428 return (error); 429 } 430 } 431 sc->so = so; 432 } 433 } else if (!pflowvalidsockaddr(sc->sc_flowdst, 0)) { 434 soclose(sc->so); 435 sc->so = NULL; 436 } 437 438 /* error check is above */ 439 if (pflowr->addrmask & PFLOW_MASK_VERSION) 440 sc->sc_version = pflowr->version; 441 442 pflow_setmtu(sc, ETHERMTU); 443 pflow_init_timeouts(sc); 444 445 return (0); 446 } 447 448 int 449 pflowioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 450 { 451 struct proc *p = curproc; 452 struct pflow_softc *sc = ifp->if_softc; 453 struct ifreq *ifr = (struct ifreq *)data; 454 struct pflowreq pflowr; 455 int s, error; 456 457 switch (cmd) { 458 case SIOCSIFADDR: 459 case SIOCSIFDSTADDR: 460 case SIOCSIFFLAGS: 461 if ((ifp->if_flags & IFF_UP) && sc->so != NULL) { 462 ifp->if_flags |= IFF_RUNNING; 463 sc->sc_gcounter=pflowstats.pflow_flows; 464 /* send templates on startup */ 465 if (sc->sc_version == PFLOW_PROTO_10) { 466 s = splnet(); 467 pflow_sendout_ipfix_tmpl(sc); 468 splx(s); 469 } 470 } else 471 ifp->if_flags &= ~IFF_RUNNING; 472 break; 473 case SIOCSIFMTU: 474 if (ifr->ifr_mtu < PFLOW_MINMTU) 475 return (EINVAL); 476 if (ifr->ifr_mtu > MCLBYTES) 477 ifr->ifr_mtu = MCLBYTES; 478 s = splnet(); 479 if (ifr->ifr_mtu < ifp->if_mtu) 480 pflow_flush(sc); 481 pflow_setmtu(sc, ifr->ifr_mtu); 482 splx(s); 483 break; 484 485 case SIOCGETPFLOW: 486 bzero(&pflowr, sizeof(pflowr)); 487 488 if (sc->sc_flowsrc != NULL) 489 memcpy(&pflowr.flowsrc, sc->sc_flowsrc, 490 sc->sc_flowsrc->sa_len); 491 if (sc->sc_flowdst != NULL) 492 memcpy(&pflowr.flowdst, sc->sc_flowdst, 493 sc->sc_flowdst->sa_len); 494 pflowr.version = sc->sc_version; 495 496 if ((error = copyout(&pflowr, ifr->ifr_data, 497 sizeof(pflowr)))) 498 return (error); 499 break; 500 501 case SIOCSETPFLOW: 502 if ((error = suser(p, 0)) != 0) 503 return (error); 504 if ((error = copyin(ifr->ifr_data, &pflowr, 505 sizeof(pflowr)))) 506 return (error); 507 508 s = splnet(); 509 error = pflow_set(sc, &pflowr); 510 splx(s); 511 if (error != 0) 512 return (error); 513 514 if ((ifp->if_flags & IFF_UP) && sc->so != NULL) { 515 ifp->if_flags |= IFF_RUNNING; 516 sc->sc_gcounter=pflowstats.pflow_flows; 517 if (sc->sc_version == PFLOW_PROTO_10) { 518 s = splnet(); 519 pflow_sendout_ipfix_tmpl(sc); 520 splx(s); 521 } 522 } else 523 ifp->if_flags &= ~IFF_RUNNING; 524 525 break; 526 527 default: 528 return (ENOTTY); 529 } 530 return (0); 531 } 532 533 void 534 pflow_init_timeouts(struct pflow_softc *sc) 535 { 536 switch (sc->sc_version) { 537 case PFLOW_PROTO_5: 538 if (timeout_initialized(&sc->sc_tmo6)) 539 timeout_del(&sc->sc_tmo6); 540 if (timeout_initialized(&sc->sc_tmo_tmpl)) 541 timeout_del(&sc->sc_tmo_tmpl); 542 if (!timeout_initialized(&sc->sc_tmo)) 543 timeout_set_proc(&sc->sc_tmo, pflow_timeout, sc); 544 break; 545 case PFLOW_PROTO_10: 546 if (!timeout_initialized(&sc->sc_tmo_tmpl)) 547 timeout_set_proc(&sc->sc_tmo_tmpl, pflow_timeout_tmpl, 548 sc); 549 if (!timeout_initialized(&sc->sc_tmo)) 550 timeout_set_proc(&sc->sc_tmo, pflow_timeout, sc); 551 if (!timeout_initialized(&sc->sc_tmo6)) 552 timeout_set_proc(&sc->sc_tmo6, pflow_timeout6, sc); 553 554 timeout_add_sec(&sc->sc_tmo_tmpl, PFLOW_TMPL_TIMEOUT); 555 break; 556 default: /* NOTREACHED */ 557 break; 558 } 559 } 560 561 int 562 pflow_calc_mtu(struct pflow_softc *sc, int mtu, int hdrsz) 563 { 564 565 sc->sc_maxcount4 = (mtu - hdrsz - 566 sizeof(struct udpiphdr)) / sizeof(struct pflow_ipfix_flow4); 567 sc->sc_maxcount6 = (mtu - hdrsz - 568 sizeof(struct udpiphdr)) / sizeof(struct pflow_ipfix_flow6); 569 if (sc->sc_maxcount4 > PFLOW_MAXFLOWS) 570 sc->sc_maxcount4 = PFLOW_MAXFLOWS; 571 if (sc->sc_maxcount6 > PFLOW_MAXFLOWS) 572 sc->sc_maxcount6 = PFLOW_MAXFLOWS; 573 return (hdrsz + sizeof(struct udpiphdr) + 574 MIN(sc->sc_maxcount4 * sizeof(struct pflow_ipfix_flow4), 575 sc->sc_maxcount6 * sizeof(struct pflow_ipfix_flow6))); 576 } 577 578 void 579 pflow_setmtu(struct pflow_softc *sc, int mtu_req) 580 { 581 int mtu; 582 583 if (sc->sc_pflow_ifp && sc->sc_pflow_ifp->if_mtu < mtu_req) 584 mtu = sc->sc_pflow_ifp->if_mtu; 585 else 586 mtu = mtu_req; 587 588 switch (sc->sc_version) { 589 case PFLOW_PROTO_5: 590 sc->sc_maxcount = (mtu - sizeof(struct pflow_header) - 591 sizeof(struct udpiphdr)) / sizeof(struct pflow_flow); 592 if (sc->sc_maxcount > PFLOW_MAXFLOWS) 593 sc->sc_maxcount = PFLOW_MAXFLOWS; 594 sc->sc_if.if_mtu = sizeof(struct pflow_header) + 595 sizeof(struct udpiphdr) + 596 sc->sc_maxcount * sizeof(struct pflow_flow); 597 break; 598 case PFLOW_PROTO_10: 599 sc->sc_if.if_mtu = 600 pflow_calc_mtu(sc, mtu, sizeof(struct pflow_v10_header)); 601 break; 602 default: /* NOTREACHED */ 603 break; 604 } 605 } 606 607 struct mbuf * 608 pflow_get_mbuf(struct pflow_softc *sc, u_int16_t set_id) 609 { 610 struct pflow_set_header set_hdr; 611 struct pflow_header h; 612 struct mbuf *m; 613 614 MGETHDR(m, M_DONTWAIT, MT_DATA); 615 if (m == NULL) { 616 pflowstats.pflow_onomem++; 617 return (NULL); 618 } 619 620 MCLGET(m, M_DONTWAIT); 621 if ((m->m_flags & M_EXT) == 0) { 622 m_free(m); 623 pflowstats.pflow_onomem++; 624 return (NULL); 625 } 626 627 m->m_len = m->m_pkthdr.len = 0; 628 m->m_pkthdr.ph_ifidx = 0; 629 630 if (sc == NULL) /* get only a new empty mbuf */ 631 return (m); 632 633 if (sc->sc_version == PFLOW_PROTO_5) { 634 /* populate pflow_header */ 635 h.reserved1 = 0; 636 h.reserved2 = 0; 637 h.count = 0; 638 h.version = htons(PFLOW_PROTO_5); 639 h.flow_sequence = htonl(sc->sc_gcounter); 640 h.engine_type = PFLOW_ENGINE_TYPE; 641 h.engine_id = PFLOW_ENGINE_ID; 642 m_copyback(m, 0, PFLOW_HDRLEN, &h, M_NOWAIT); 643 644 sc->sc_count = 0; 645 timeout_add_sec(&sc->sc_tmo, PFLOW_TIMEOUT); 646 } else { 647 /* populate pflow_set_header */ 648 set_hdr.set_length = 0; 649 set_hdr.set_id = htons(set_id); 650 m_copyback(m, 0, PFLOW_SET_HDRLEN, &set_hdr, M_NOWAIT); 651 } 652 653 return (m); 654 } 655 656 void 657 copy_flow_data(struct pflow_flow *flow1, struct pflow_flow *flow2, 658 struct pf_state *st, struct pf_state_key *sk, int src, int dst) 659 { 660 flow1->src_ip = flow2->dest_ip = sk->addr[src].v4.s_addr; 661 flow1->src_port = flow2->dest_port = sk->port[src]; 662 flow1->dest_ip = flow2->src_ip = sk->addr[dst].v4.s_addr; 663 flow1->dest_port = flow2->src_port = sk->port[dst]; 664 665 flow1->dest_as = flow2->src_as = 666 flow1->src_as = flow2->dest_as = 0; 667 flow1->if_index_in = htons(st->if_index_in); 668 flow1->if_index_out = htons(st->if_index_out); 669 flow2->if_index_in = htons(st->if_index_out); 670 flow2->if_index_out = htons(st->if_index_in); 671 flow1->dest_mask = flow2->src_mask = 672 flow1->src_mask = flow2->dest_mask = 0; 673 674 flow1->flow_packets = htonl(st->packets[0]); 675 flow2->flow_packets = htonl(st->packets[1]); 676 flow1->flow_octets = htonl(st->bytes[0]); 677 flow2->flow_octets = htonl(st->bytes[1]); 678 679 /* 680 * Pretend the flow was created or expired when the machine came up 681 * when creation is in the future of the last time a package was seen 682 * or was created / expired before this machine came up due to pfsync. 683 */ 684 flow1->flow_start = flow2->flow_start = st->creation < 0 || 685 st->creation > st->expire ? htonl(0) : htonl(st->creation * 1000); 686 flow1->flow_finish = flow2->flow_finish = st->expire < 0 ? htonl(0) : 687 htonl(st->expire * 1000); 688 flow1->tcp_flags = flow2->tcp_flags = 0; 689 flow1->protocol = flow2->protocol = sk->proto; 690 flow1->tos = flow2->tos = st->rule.ptr->tos; 691 } 692 693 void 694 copy_flow_ipfix_4_data(struct pflow_ipfix_flow4 *flow1, 695 struct pflow_ipfix_flow4 *flow2, struct pf_state *st, 696 struct pf_state_key *sk, struct pflow_softc *sc, int src, int dst) 697 { 698 flow1->src_ip = flow2->dest_ip = sk->addr[src].v4.s_addr; 699 flow1->src_port = flow2->dest_port = sk->port[src]; 700 flow1->dest_ip = flow2->src_ip = sk->addr[dst].v4.s_addr; 701 flow1->dest_port = flow2->src_port = sk->port[dst]; 702 703 flow1->if_index_in = htonl(st->if_index_in); 704 flow1->if_index_out = htonl(st->if_index_out); 705 flow2->if_index_in = htonl(st->if_index_out); 706 flow2->if_index_out = htonl(st->if_index_in); 707 708 flow1->flow_packets = htobe64(st->packets[0]); 709 flow2->flow_packets = htobe64(st->packets[1]); 710 flow1->flow_octets = htobe64(st->bytes[0]); 711 flow2->flow_octets = htobe64(st->bytes[1]); 712 713 /* 714 * Pretend the flow was created when the machine came up when creation 715 * is in the future of the last time a package was seen due to pfsync. 716 */ 717 if (st->creation > st->expire) 718 flow1->flow_start = flow2->flow_start = htobe64((time_second - 719 time_uptime)*1000); 720 else 721 flow1->flow_start = flow2->flow_start = htobe64((time_second - 722 (time_uptime - st->creation))*1000); 723 flow1->flow_finish = flow2->flow_finish = htobe64((time_second - 724 (time_uptime - st->expire))*1000); 725 726 flow1->protocol = flow2->protocol = sk->proto; 727 flow1->tos = flow2->tos = st->rule.ptr->tos; 728 } 729 730 void 731 copy_flow_ipfix_6_data(struct pflow_ipfix_flow6 *flow1, 732 struct pflow_ipfix_flow6 *flow2, struct pf_state *st, 733 struct pf_state_key *sk, struct pflow_softc *sc, int src, int dst) 734 { 735 bcopy(&sk->addr[src].v6, &flow1->src_ip, sizeof(flow1->src_ip)); 736 bcopy(&sk->addr[src].v6, &flow2->dest_ip, sizeof(flow2->dest_ip)); 737 flow1->src_port = flow2->dest_port = sk->port[src]; 738 bcopy(&sk->addr[dst].v6, &flow1->dest_ip, sizeof(flow1->dest_ip)); 739 bcopy(&sk->addr[dst].v6, &flow2->src_ip, sizeof(flow2->src_ip)); 740 flow1->dest_port = flow2->src_port = sk->port[dst]; 741 742 flow1->if_index_in = htonl(st->if_index_in); 743 flow1->if_index_out = htonl(st->if_index_out); 744 flow2->if_index_in = htonl(st->if_index_out); 745 flow2->if_index_out = htonl(st->if_index_in); 746 747 flow1->flow_packets = htobe64(st->packets[0]); 748 flow2->flow_packets = htobe64(st->packets[1]); 749 flow1->flow_octets = htobe64(st->bytes[0]); 750 flow2->flow_octets = htobe64(st->bytes[1]); 751 752 /* 753 * Pretend the flow was created when the machine came up when creation 754 * is in the future of the last time a package was seen due to pfsync. 755 */ 756 if (st->creation > st->expire) 757 flow1->flow_start = flow2->flow_start = htobe64((time_second - 758 time_uptime)*1000); 759 else 760 flow1->flow_start = flow2->flow_start = htobe64((time_second - 761 (time_uptime - st->creation))*1000); 762 flow1->flow_finish = flow2->flow_finish = htobe64((time_second - 763 (time_uptime - st->expire))*1000); 764 765 flow1->protocol = flow2->protocol = sk->proto; 766 flow1->tos = flow2->tos = st->rule.ptr->tos; 767 } 768 769 int 770 export_pflow(struct pf_state *st) 771 { 772 struct pflow_softc *sc = NULL; 773 struct pf_state_key *sk; 774 775 sk = st->key[st->direction == PF_IN ? PF_SK_WIRE : PF_SK_STACK]; 776 777 SLIST_FOREACH(sc, &pflowif_list, sc_next) { 778 switch (sc->sc_version) { 779 case PFLOW_PROTO_5: 780 if( sk->af == AF_INET ) 781 export_pflow_if(st, sk, sc); 782 break; 783 case PFLOW_PROTO_10: 784 if( sk->af == AF_INET || sk->af == AF_INET6 ) 785 export_pflow_if(st, sk, sc); 786 break; 787 default: /* NOTREACHED */ 788 break; 789 } 790 } 791 792 return (0); 793 } 794 795 int 796 export_pflow_if(struct pf_state *st, struct pf_state_key *sk, 797 struct pflow_softc *sc) 798 { 799 struct pf_state pfs_copy; 800 struct ifnet *ifp = &sc->sc_if; 801 u_int64_t bytes[2]; 802 int ret = 0; 803 804 if (!(ifp->if_flags & IFF_RUNNING)) 805 return (0); 806 807 if (sc->sc_version == PFLOW_PROTO_10) 808 return (pflow_pack_flow_ipfix(st, sk, sc)); 809 810 /* PFLOW_PROTO_5 */ 811 if ((st->bytes[0] < (u_int64_t)PFLOW_MAXBYTES) 812 && (st->bytes[1] < (u_int64_t)PFLOW_MAXBYTES)) 813 return (pflow_pack_flow(st, sk, sc)); 814 815 /* flow > PFLOW_MAXBYTES need special handling */ 816 bcopy(st, &pfs_copy, sizeof(pfs_copy)); 817 bytes[0] = pfs_copy.bytes[0]; 818 bytes[1] = pfs_copy.bytes[1]; 819 820 while (bytes[0] > PFLOW_MAXBYTES) { 821 pfs_copy.bytes[0] = PFLOW_MAXBYTES; 822 pfs_copy.bytes[1] = 0; 823 824 if ((ret = pflow_pack_flow(&pfs_copy, sk, sc)) != 0) 825 return (ret); 826 if ((bytes[0] - PFLOW_MAXBYTES) > 0) 827 bytes[0] -= PFLOW_MAXBYTES; 828 } 829 830 while (bytes[1] > (u_int64_t)PFLOW_MAXBYTES) { 831 pfs_copy.bytes[1] = PFLOW_MAXBYTES; 832 pfs_copy.bytes[0] = 0; 833 834 if ((ret = pflow_pack_flow(&pfs_copy, sk, sc)) != 0) 835 return (ret); 836 if ((bytes[1] - PFLOW_MAXBYTES) > 0) 837 bytes[1] -= PFLOW_MAXBYTES; 838 } 839 840 pfs_copy.bytes[0] = bytes[0]; 841 pfs_copy.bytes[1] = bytes[1]; 842 843 return (pflow_pack_flow(&pfs_copy, sk, sc)); 844 } 845 846 int 847 copy_flow_to_m(struct pflow_flow *flow, struct pflow_softc *sc) 848 { 849 int s, ret = 0; 850 851 s = splnet(); 852 if (sc->sc_mbuf == NULL) { 853 if ((sc->sc_mbuf = pflow_get_mbuf(sc, 0)) == NULL) { 854 splx(s); 855 return (ENOBUFS); 856 } 857 } 858 m_copyback(sc->sc_mbuf, PFLOW_HDRLEN + 859 (sc->sc_count * sizeof(struct pflow_flow)), 860 sizeof(struct pflow_flow), flow, M_NOWAIT); 861 862 if (pflowstats.pflow_flows == sc->sc_gcounter) 863 pflowstats.pflow_flows++; 864 sc->sc_gcounter++; 865 sc->sc_count++; 866 867 if (sc->sc_count >= sc->sc_maxcount) 868 ret = pflow_sendout_v5(sc); 869 870 splx(s); 871 return(ret); 872 } 873 874 int 875 copy_flow_ipfix_4_to_m(struct pflow_ipfix_flow4 *flow, struct pflow_softc *sc) 876 { 877 int s, ret = 0; 878 879 s = splnet(); 880 if (sc->sc_mbuf == NULL) { 881 if ((sc->sc_mbuf = 882 pflow_get_mbuf(sc, PFLOW_IPFIX_TMPL_IPV4_ID)) == NULL) { 883 splx(s); 884 return (ENOBUFS); 885 } 886 sc->sc_count4 = 0; 887 timeout_add_sec(&sc->sc_tmo, PFLOW_TIMEOUT); 888 } 889 m_copyback(sc->sc_mbuf, PFLOW_SET_HDRLEN + 890 (sc->sc_count4 * sizeof(struct pflow_ipfix_flow4)), 891 sizeof(struct pflow_ipfix_flow4), flow, M_NOWAIT); 892 893 if (pflowstats.pflow_flows == sc->sc_gcounter) 894 pflowstats.pflow_flows++; 895 sc->sc_gcounter++; 896 sc->sc_count4++; 897 898 if (sc->sc_count4 >= sc->sc_maxcount4) 899 ret = pflow_sendout_ipfix(sc, AF_INET); 900 splx(s); 901 return(ret); 902 } 903 904 int 905 copy_flow_ipfix_6_to_m(struct pflow_ipfix_flow6 *flow, struct pflow_softc *sc) 906 { 907 int s, ret = 0; 908 909 s = splnet(); 910 if (sc->sc_mbuf6 == NULL) { 911 if ((sc->sc_mbuf6 = 912 pflow_get_mbuf(sc, PFLOW_IPFIX_TMPL_IPV6_ID)) == NULL) { 913 splx(s); 914 return (ENOBUFS); 915 } 916 sc->sc_count6 = 0; 917 timeout_add_sec(&sc->sc_tmo6, PFLOW_TIMEOUT); 918 } 919 m_copyback(sc->sc_mbuf6, PFLOW_SET_HDRLEN + 920 (sc->sc_count6 * sizeof(struct pflow_ipfix_flow6)), 921 sizeof(struct pflow_ipfix_flow6), flow, M_NOWAIT); 922 923 if (pflowstats.pflow_flows == sc->sc_gcounter) 924 pflowstats.pflow_flows++; 925 sc->sc_gcounter++; 926 sc->sc_count6++; 927 928 if (sc->sc_count6 >= sc->sc_maxcount6) 929 ret = pflow_sendout_ipfix(sc, AF_INET6); 930 931 splx(s); 932 return(ret); 933 } 934 935 int 936 pflow_pack_flow(struct pf_state *st, struct pf_state_key *sk, 937 struct pflow_softc *sc) 938 { 939 struct pflow_flow flow1; 940 struct pflow_flow flow2; 941 int ret = 0; 942 943 bzero(&flow1, sizeof(flow1)); 944 bzero(&flow2, sizeof(flow2)); 945 946 if (st->direction == PF_OUT) 947 copy_flow_data(&flow1, &flow2, st, sk, 1, 0); 948 else 949 copy_flow_data(&flow1, &flow2, st, sk, 0, 1); 950 951 if (st->bytes[0] != 0) /* first flow from state */ 952 ret = copy_flow_to_m(&flow1, sc); 953 954 if (st->bytes[1] != 0) /* second flow from state */ 955 ret = copy_flow_to_m(&flow2, sc); 956 957 return (ret); 958 } 959 960 int 961 pflow_pack_flow_ipfix(struct pf_state *st, struct pf_state_key *sk, 962 struct pflow_softc *sc) 963 { 964 struct pflow_ipfix_flow4 flow4_1, flow4_2; 965 struct pflow_ipfix_flow6 flow6_1, flow6_2; 966 int ret = 0; 967 if (sk->af == AF_INET) { 968 bzero(&flow4_1, sizeof(flow4_1)); 969 bzero(&flow4_2, sizeof(flow4_2)); 970 971 if (st->direction == PF_OUT) 972 copy_flow_ipfix_4_data(&flow4_1, &flow4_2, st, sk, sc, 973 1, 0); 974 else 975 copy_flow_ipfix_4_data(&flow4_1, &flow4_2, st, sk, sc, 976 0, 1); 977 978 if (st->bytes[0] != 0) /* first flow from state */ 979 ret = copy_flow_ipfix_4_to_m(&flow4_1, sc); 980 981 if (st->bytes[1] != 0) /* second flow from state */ 982 ret = copy_flow_ipfix_4_to_m(&flow4_2, sc); 983 } else if (sk->af == AF_INET6) { 984 bzero(&flow6_1, sizeof(flow6_1)); 985 bzero(&flow6_2, sizeof(flow6_2)); 986 987 if (st->direction == PF_OUT) 988 copy_flow_ipfix_6_data(&flow6_1, &flow6_2, st, sk, sc, 989 1, 0); 990 else 991 copy_flow_ipfix_6_data(&flow6_1, &flow6_2, st, sk, sc, 992 0, 1); 993 994 if (st->bytes[0] != 0) /* first flow from state */ 995 ret = copy_flow_ipfix_6_to_m(&flow6_1, sc); 996 997 if (st->bytes[1] != 0) /* second flow from state */ 998 ret = copy_flow_ipfix_6_to_m(&flow6_2, sc); 999 } 1000 return (ret); 1001 } 1002 1003 void 1004 pflow_timeout(void *v) 1005 { 1006 struct pflow_softc *sc = v; 1007 int s; 1008 1009 s = splnet(); 1010 switch (sc->sc_version) { 1011 case PFLOW_PROTO_5: 1012 pflow_sendout_v5(sc); 1013 break; 1014 case PFLOW_PROTO_10: 1015 pflow_sendout_ipfix(sc, AF_INET); 1016 break; 1017 default: /* NOTREACHED */ 1018 break; 1019 } 1020 splx(s); 1021 } 1022 1023 void 1024 pflow_timeout6(void *v) 1025 { 1026 struct pflow_softc *sc = v; 1027 int s; 1028 1029 s = splnet(); 1030 pflow_sendout_ipfix(sc, AF_INET6); 1031 splx(s); 1032 } 1033 1034 void 1035 pflow_timeout_tmpl(void *v) 1036 { 1037 struct pflow_softc *sc = v; 1038 int s; 1039 1040 s = splnet(); 1041 pflow_sendout_ipfix_tmpl(sc); 1042 splx(s); 1043 } 1044 1045 /* This must be called in splnet() */ 1046 void 1047 pflow_flush(struct pflow_softc *sc) 1048 { 1049 switch (sc->sc_version) { 1050 case PFLOW_PROTO_5: 1051 pflow_sendout_v5(sc); 1052 break; 1053 case PFLOW_PROTO_10: 1054 pflow_sendout_ipfix(sc, AF_INET); 1055 pflow_sendout_ipfix(sc, AF_INET6); 1056 break; 1057 default: /* NOTREACHED */ 1058 break; 1059 } 1060 } 1061 1062 1063 /* This must be called in splnet() */ 1064 int 1065 pflow_sendout_v5(struct pflow_softc *sc) 1066 { 1067 struct mbuf *m = sc->sc_mbuf; 1068 struct pflow_header *h; 1069 struct ifnet *ifp = &sc->sc_if; 1070 struct timespec tv; 1071 1072 timeout_del(&sc->sc_tmo); 1073 1074 if (m == NULL) 1075 return (0); 1076 1077 sc->sc_mbuf = NULL; 1078 if (!(ifp->if_flags & IFF_RUNNING)) { 1079 m_freem(m); 1080 return (0); 1081 } 1082 1083 pflowstats.pflow_packets++; 1084 h = mtod(m, struct pflow_header *); 1085 h->count = htons(sc->sc_count); 1086 1087 /* populate pflow_header */ 1088 h->uptime_ms = htonl(time_uptime * 1000); 1089 1090 getnanotime(&tv); 1091 h->time_sec = htonl(tv.tv_sec); /* XXX 2038 */ 1092 h->time_nanosec = htonl(tv.tv_nsec); 1093 1094 return (pflow_sendout_mbuf(sc, m)); 1095 } 1096 1097 /* This must be called in splnet() */ 1098 int 1099 pflow_sendout_ipfix(struct pflow_softc *sc, sa_family_t af) 1100 { 1101 struct mbuf *m; 1102 struct pflow_v10_header *h10; 1103 struct pflow_set_header *set_hdr; 1104 struct ifnet *ifp = &sc->sc_if; 1105 u_int32_t count; 1106 int set_length; 1107 1108 switch (af) { 1109 case AF_INET: 1110 m = sc->sc_mbuf; 1111 timeout_del(&sc->sc_tmo); 1112 if (m == NULL) 1113 return (0); 1114 sc->sc_mbuf = NULL; 1115 count = sc->sc_count4; 1116 set_length = sizeof(struct pflow_set_header) 1117 + sc->sc_count4 * sizeof(struct pflow_ipfix_flow4); 1118 break; 1119 case AF_INET6: 1120 m = sc->sc_mbuf6; 1121 timeout_del(&sc->sc_tmo6); 1122 if (m == NULL) 1123 return (0); 1124 sc->sc_mbuf6 = NULL; 1125 count = sc->sc_count6; 1126 set_length = sizeof(struct pflow_set_header) 1127 + sc->sc_count6 * sizeof(struct pflow_ipfix_flow6); 1128 break; 1129 default: 1130 unhandled_af(af); 1131 } 1132 1133 if (!(ifp->if_flags & IFF_RUNNING)) { 1134 m_freem(m); 1135 return (0); 1136 } 1137 1138 pflowstats.pflow_packets++; 1139 set_hdr = mtod(m, struct pflow_set_header *); 1140 set_hdr->set_length = htons(set_length); 1141 1142 /* populate pflow_header */ 1143 M_PREPEND(m, sizeof(struct pflow_v10_header), M_DONTWAIT); 1144 if (m == NULL) { 1145 pflowstats.pflow_onomem++; 1146 return (ENOBUFS); 1147 } 1148 h10 = mtod(m, struct pflow_v10_header *); 1149 h10->version = htons(PFLOW_PROTO_10); 1150 h10->length = htons(PFLOW_IPFIX_HDRLEN + set_length); 1151 h10->time_sec = htonl(time_second); /* XXX 2038 */ 1152 h10->flow_sequence = htonl(sc->sc_sequence); 1153 sc->sc_sequence += count; 1154 h10->observation_dom = htonl(PFLOW_ENGINE_TYPE); 1155 return (pflow_sendout_mbuf(sc, m)); 1156 } 1157 1158 /* This must be called in splnet() */ 1159 int 1160 pflow_sendout_ipfix_tmpl(struct pflow_softc *sc) 1161 { 1162 struct mbuf *m; 1163 struct pflow_v10_header *h10; 1164 struct ifnet *ifp = &sc->sc_if; 1165 1166 timeout_del(&sc->sc_tmo_tmpl); 1167 1168 if (!(ifp->if_flags & IFF_RUNNING)) { 1169 return (0); 1170 } 1171 m = pflow_get_mbuf(NULL, 0); 1172 if (m == NULL) 1173 return (0); 1174 if (m_copyback(m, 0, sizeof(struct pflow_ipfix_tmpl), 1175 &sc->sc_tmpl_ipfix, M_NOWAIT)) { 1176 m_freem(m); 1177 return (0); 1178 } 1179 pflowstats.pflow_packets++; 1180 1181 /* populate pflow_header */ 1182 M_PREPEND(m, sizeof(struct pflow_v10_header), M_DONTWAIT); 1183 if (m == NULL) { 1184 pflowstats.pflow_onomem++; 1185 return (ENOBUFS); 1186 } 1187 h10 = mtod(m, struct pflow_v10_header *); 1188 h10->version = htons(PFLOW_PROTO_10); 1189 h10->length = htons(PFLOW_IPFIX_HDRLEN + sizeof(struct 1190 pflow_ipfix_tmpl)); 1191 h10->time_sec = htonl(time_second); /* XXX 2038 */ 1192 h10->flow_sequence = htonl(sc->sc_sequence); 1193 h10->observation_dom = htonl(PFLOW_ENGINE_TYPE); 1194 1195 timeout_add_sec(&sc->sc_tmo_tmpl, PFLOW_TMPL_TIMEOUT); 1196 return (pflow_sendout_mbuf(sc, m)); 1197 } 1198 1199 int 1200 pflow_sendout_mbuf(struct pflow_softc *sc, struct mbuf *m) 1201 { 1202 sc->sc_if.if_opackets++; 1203 sc->sc_if.if_obytes += m->m_pkthdr.len; 1204 1205 if (sc->so == NULL) { 1206 m_freem(m); 1207 return (EINVAL); 1208 } 1209 return (sosend(sc->so, sc->send_nam, NULL, m, NULL, 0)); 1210 } 1211 1212 int 1213 pflow_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 1214 void *newp, size_t newlen) 1215 { 1216 if (namelen != 1) 1217 return (ENOTDIR); 1218 1219 switch (name[0]) { 1220 case NET_PFLOW_STATS: 1221 if (newp != NULL) 1222 return (EPERM); 1223 return (sysctl_struct(oldp, oldlenp, newp, newlen, 1224 &pflowstats, sizeof(pflowstats))); 1225 default: 1226 return (EOPNOTSUPP); 1227 } 1228 return (0); 1229 } 1230