| File: | net/if_bridge.c |
| Warning: | line 1634, column 5 Value stored to 'error' is never read |
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| 1 | /* $OpenBSD: if_bridge.c,v 1.363 2022/01/04 06:32:39 yasuoka Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright (c) 1999, 2000 Jason L. Wright (jason@thought.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 ``AS IS'' AND ANY EXPRESS OR |
| 17 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| 18 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| 19 | * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, |
| 20 | * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| 21 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| 22 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 23 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 24 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
| 25 | * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 26 | * POSSIBILITY OF SUCH DAMAGE. |
| 27 | * |
| 28 | * Effort sponsored in part by the Defense Advanced Research Projects |
| 29 | * Agency (DARPA) and Air Force Research Laboratory, Air Force |
| 30 | * Materiel Command, USAF, under agreement number F30602-01-2-0537. |
| 31 | * |
| 32 | */ |
| 33 | |
| 34 | #include "bpfilter.h" |
| 35 | #include "gif.h" |
| 36 | #include "pf.h" |
| 37 | #include "carp.h" |
| 38 | #include "vlan.h" |
| 39 | |
| 40 | #include <sys/param.h> |
| 41 | #include <sys/systm.h> |
| 42 | #include <sys/mbuf.h> |
| 43 | #include <sys/socket.h> |
| 44 | #include <sys/ioctl.h> |
| 45 | #include <sys/kernel.h> |
| 46 | |
| 47 | #include <net/if.h> |
| 48 | #include <net/if_types.h> |
| 49 | #include <net/if_llc.h> |
| 50 | #include <net/netisr.h> |
| 51 | |
| 52 | #include <netinet/in.h> |
| 53 | #include <netinet/ip.h> |
| 54 | #include <netinet/ip_var.h> |
| 55 | #include <netinet/if_ether.h> |
| 56 | #include <netinet/ip_icmp.h> |
| 57 | |
| 58 | #ifdef IPSEC1 |
| 59 | #include <netinet/ip_ipsp.h> |
| 60 | #include <net/if_enc.h> |
| 61 | #endif |
| 62 | |
| 63 | #ifdef INET61 |
| 64 | #include <netinet6/in6_var.h> |
| 65 | #include <netinet/ip6.h> |
| 66 | #include <netinet6/ip6_var.h> |
| 67 | #endif |
| 68 | |
| 69 | #if NPF1 > 0 |
| 70 | #include <net/pfvar.h> |
| 71 | #define BRIDGE_INPF_IN PF_IN |
| 72 | #define BRIDGE_OUTPF_OUT PF_OUT |
| 73 | #else |
| 74 | #define BRIDGE_INPF_IN 0 |
| 75 | #define BRIDGE_OUTPF_OUT 1 |
| 76 | #endif |
| 77 | |
| 78 | #if NBPFILTER1 > 0 |
| 79 | #include <net/bpf.h> |
| 80 | #endif |
| 81 | |
| 82 | #if NCARP1 > 0 |
| 83 | #include <netinet/ip_carp.h> |
| 84 | #endif |
| 85 | |
| 86 | #if NVLAN1 > 0 |
| 87 | #include <net/if_vlan_var.h> |
| 88 | #endif |
| 89 | |
| 90 | #include <net/if_bridge.h> |
| 91 | |
| 92 | /* |
| 93 | * Maximum number of addresses to cache |
| 94 | */ |
| 95 | #ifndef BRIDGE_RTABLE_MAX100 |
| 96 | #define BRIDGE_RTABLE_MAX100 100 |
| 97 | #endif |
| 98 | |
| 99 | /* |
| 100 | * Timeout (in seconds) for entries learned dynamically |
| 101 | */ |
| 102 | #ifndef BRIDGE_RTABLE_TIMEOUT240 |
| 103 | #define BRIDGE_RTABLE_TIMEOUT240 240 |
| 104 | #endif |
| 105 | |
| 106 | void bridgeattach(int); |
| 107 | int bridge_ioctl(struct ifnet *, u_long, caddr_t); |
| 108 | void bridge_ifdetach(void *); |
| 109 | void bridge_spandetach(void *); |
| 110 | int bridge_ifremove(struct bridge_iflist *); |
| 111 | void bridge_spanremove(struct bridge_iflist *); |
| 112 | struct mbuf * |
| 113 | bridge_input(struct ifnet *, struct mbuf *, uint64_t, void *); |
| 114 | void bridge_process(struct ifnet *, struct mbuf *); |
| 115 | void bridgeintr_frame(struct ifnet *, struct ifnet *, struct mbuf *); |
| 116 | void bridge_bifgetstp(struct bridge_softc *, struct bridge_iflist *, |
| 117 | struct ifbreq *); |
| 118 | void bridge_broadcast(struct bridge_softc *, struct ifnet *, |
| 119 | struct ether_header *, struct mbuf *); |
| 120 | int bridge_localbroadcast(struct ifnet *, struct ether_header *, |
| 121 | struct mbuf *); |
| 122 | void bridge_span(struct ifnet *, struct mbuf *); |
| 123 | void bridge_stop(struct bridge_softc *); |
| 124 | void bridge_init(struct bridge_softc *); |
| 125 | int bridge_bifconf(struct bridge_softc *, struct ifbifconf *); |
| 126 | int bridge_blocknonip(struct ether_header *, struct mbuf *); |
| 127 | void bridge_ifinput(struct ifnet *, struct mbuf *); |
| 128 | int bridge_dummy_output(struct ifnet *, struct mbuf *, struct sockaddr *, |
| 129 | struct rtentry *); |
| 130 | void bridge_send_icmp_err(struct ifnet *, struct ether_header *, |
| 131 | struct mbuf *, int, struct llc *, int, int, int); |
| 132 | int bridge_ifenqueue(struct ifnet *, struct ifnet *, struct mbuf *); |
| 133 | struct mbuf *bridge_ip(struct ifnet *, int, struct ifnet *, |
| 134 | struct ether_header *, struct mbuf *); |
| 135 | #ifdef IPSEC1 |
| 136 | int bridge_ipsec(struct ifnet *, struct ether_header *, int, struct llc *, |
| 137 | int, int, int, struct mbuf *); |
| 138 | #endif |
| 139 | int bridge_clone_create(struct if_clone *, int); |
| 140 | int bridge_clone_destroy(struct ifnet *); |
| 141 | void bridge_take(void *); |
| 142 | void bridge_rele(void *); |
| 143 | |
| 144 | #define ETHERADDR_IS_IP_MCAST(a)((a)->ether_addr_octet[0] == 0x01 && (a)->ether_addr_octet [1] == 0x00 && (a)->ether_addr_octet[2] == 0x5e) \ |
| 145 | /* struct etheraddr *a; */ \ |
| 146 | ((a)->ether_addr_octet[0] == 0x01 && \ |
| 147 | (a)->ether_addr_octet[1] == 0x00 && \ |
| 148 | (a)->ether_addr_octet[2] == 0x5e) |
| 149 | |
| 150 | struct niqueue bridgeintrq = NIQUEUE_INITIALIZER(1024, NETISR_BRIDGE){ { { ((void *)0), ((((0x7)) > 0x0 && ((0x7)) < 0x9) ? 0x9 : ((0x7))), 0x0 }, { ((void *)0), ((void *)0), 0 } , ((1024)), 0 }, (29) }; |
| 151 | |
| 152 | struct if_clone bridge_cloner = |
| 153 | IF_CLONE_INITIALIZER("bridge", bridge_clone_create, bridge_clone_destroy){ .ifc_list = { ((void *)0), ((void *)0) }, .ifc_name = "bridge" , .ifc_namelen = sizeof("bridge") - 1, .ifc_create = bridge_clone_create , .ifc_destroy = bridge_clone_destroy, }; |
| 154 | |
| 155 | const struct ether_brport bridge_brport = { |
| 156 | bridge_input, |
| 157 | bridge_take, |
| 158 | bridge_rele, |
| 159 | NULL((void *)0), |
| 160 | }; |
| 161 | |
| 162 | void |
| 163 | bridgeattach(int n) |
| 164 | { |
| 165 | if_clone_attach(&bridge_cloner); |
| 166 | } |
| 167 | |
| 168 | int |
| 169 | bridge_clone_create(struct if_clone *ifc, int unit) |
| 170 | { |
| 171 | struct bridge_softc *sc; |
| 172 | struct ifnet *ifp; |
| 173 | int i; |
| 174 | |
| 175 | sc = malloc(sizeof(*sc), M_DEVBUF2, M_WAITOK0x0001|M_ZERO0x0008); |
| 176 | sc->sc_stp = bstp_create(); |
| 177 | if (!sc->sc_stp) { |
| 178 | free(sc, M_DEVBUF2, sizeof *sc); |
| 179 | return (ENOMEM12); |
| 180 | } |
| 181 | |
| 182 | sc->sc_brtmax = BRIDGE_RTABLE_MAX100; |
| 183 | sc->sc_brttimeout = BRIDGE_RTABLE_TIMEOUT240; |
| 184 | timeout_set(&sc->sc_brtimeout, bridge_rtage, sc); |
| 185 | SMR_SLIST_INIT(&sc->sc_iflist)do { (&sc->sc_iflist)->smr_slh_first = ((void *)0); } while (0); |
| 186 | SMR_SLIST_INIT(&sc->sc_spanlist)do { (&sc->sc_spanlist)->smr_slh_first = ((void *)0 ); } while (0); |
| 187 | mtx_init(&sc->sc_mtx, IPL_MPFLOOR)do { (void)(((void *)0)); (void)(0); __mtx_init((&sc-> sc_mtx), ((((0x9)) > 0x0 && ((0x9)) < 0x9) ? 0x9 : ((0x9)))); } while (0); |
| 188 | for (i = 0; i < BRIDGE_RTABLE_SIZE1024; i++) |
| 189 | LIST_INIT(&sc->sc_rts[i])do { ((&sc->sc_rts[i])->lh_first) = ((void *)0); } while (0); |
| 190 | arc4random_buf(&sc->sc_hashkey, sizeof(sc->sc_hashkey)); |
| 191 | ifp = &sc->sc_if; |
| 192 | snprintf(ifp->if_xname, sizeof ifp->if_xname, "%s%d", ifc->ifc_name, |
| 193 | unit); |
| 194 | ifp->if_softc = sc; |
| 195 | ifp->if_mtuif_data.ifi_mtu = ETHERMTU(1518 - ((6 * 2) + 2) - 4); |
| 196 | ifp->if_ioctl = bridge_ioctl; |
| 197 | ifp->if_output = bridge_dummy_output; |
| 198 | ifp->if_xflags = IFXF_CLONED0x2; |
| 199 | ifp->if_start = NULL((void *)0); |
| 200 | ifp->if_typeif_data.ifi_type = IFT_BRIDGE0xd1; |
| 201 | ifp->if_hdrlenif_data.ifi_hdrlen = ETHER_HDR_LEN((6 * 2) + 2); |
| 202 | |
| 203 | if_attach(ifp); |
| 204 | if_alloc_sadl(ifp); |
| 205 | |
| 206 | #if NBPFILTER1 > 0 |
| 207 | bpfattach(&sc->sc_if.if_bpf, ifp, |
| 208 | DLT_EN10MB1, ETHER_HDR_LEN((6 * 2) + 2)); |
| 209 | #endif |
| 210 | |
| 211 | return (0); |
| 212 | } |
| 213 | |
| 214 | int |
| 215 | bridge_dummy_output(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst, |
| 216 | struct rtentry *rt) |
| 217 | { |
| 218 | m_freem(m); |
| 219 | return (EAFNOSUPPORT47); |
| 220 | } |
| 221 | |
| 222 | int |
| 223 | bridge_clone_destroy(struct ifnet *ifp) |
| 224 | { |
| 225 | struct bridge_softc *sc = ifp->if_softc; |
| 226 | struct bridge_iflist *bif; |
| 227 | |
| 228 | /* |
| 229 | * bridge(4) detach hook doesn't need the NET_LOCK(), worst the |
| 230 | * use of smr_barrier() while holding the lock might lead to a |
| 231 | * deadlock situation. |
| 232 | */ |
| 233 | NET_ASSERT_UNLOCKED()do { int _s = rw_status(&netlock); if ((splassert_ctl > 0) && (_s == 0x0001UL)) splassert_fail(0, 0x0001UL, __func__ ); } while (0); |
| 234 | |
| 235 | bridge_stop(sc); |
| 236 | bridge_rtflush(sc, IFBF_FLUSHALL0x1); |
| 237 | while ((bif = SMR_SLIST_FIRST_LOCKED(&sc->sc_iflist)(*(&(&sc->sc_iflist)->smr_slh_first))) != NULL((void *)0)) |
| 238 | bridge_ifremove(bif); |
| 239 | while ((bif = SMR_SLIST_FIRST_LOCKED(&sc->sc_spanlist)(*(&(&sc->sc_spanlist)->smr_slh_first))) != NULL((void *)0)) |
| 240 | bridge_spanremove(bif); |
| 241 | |
| 242 | bstp_destroy(sc->sc_stp); |
| 243 | |
| 244 | if_detach(ifp); |
| 245 | |
| 246 | free(sc, M_DEVBUF2, sizeof *sc); |
| 247 | return (0); |
| 248 | } |
| 249 | |
| 250 | int |
| 251 | bridge_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) |
| 252 | { |
| 253 | struct bridge_softc *sc = (struct bridge_softc *)ifp->if_softc; |
| 254 | struct ifbreq *req = (struct ifbreq *)data; |
| 255 | struct ifbropreq *brop = (struct ifbropreq *)data; |
| 256 | struct ifnet *ifs; |
| 257 | struct bridge_iflist *bif; |
| 258 | struct bstp_port *bp; |
| 259 | struct bstp_state *bs = sc->sc_stp; |
| 260 | int error = 0; |
| 261 | |
| 262 | /* |
| 263 | * bridge(4) data structure aren't protected by the NET_LOCK(). |
| 264 | * Idealy it shouldn't be taken before calling `ifp->if_ioctl' |
| 265 | * but we aren't there yet. |
| 266 | */ |
| 267 | NET_UNLOCK()do { rw_exit_write(&netlock); } while (0); |
| 268 | |
| 269 | switch (cmd) { |
| 270 | case SIOCBRDGADD((unsigned long)0x80000000 | ((sizeof(struct ifbreq) & 0x1fff ) << 16) | ((('i')) << 8) | ((60))): |
| 271 | /* bridge(4) does not distinguish between routing/forwarding ports */ |
| 272 | case SIOCBRDGADDL((unsigned long)0x80000000 | ((sizeof(struct ifbreq) & 0x1fff ) << 16) | ((('i')) << 8) | ((73))): |
| 273 | if ((error = suser(curproc({struct cpu_info *__ci; asm volatile("movq %%gs:%P1,%0" : "=r" (__ci) :"n" (__builtin_offsetof(struct cpu_info, ci_self))); __ci;})->ci_curproc)) != 0) |
| 274 | break; |
| 275 | |
| 276 | ifs = if_unit(req->ifbr_ifsname); |
| 277 | if (ifs == NULL((void *)0)) { /* no such interface */ |
| 278 | error = ENOENT2; |
| 279 | break; |
| 280 | } |
| 281 | if (ifs->if_typeif_data.ifi_type != IFT_ETHER0x06) { |
| 282 | if_put(ifs); |
| 283 | error = EINVAL22; |
| 284 | break; |
| 285 | } |
| 286 | if (ifs->if_bridgeidx != 0) { |
| 287 | if (ifs->if_bridgeidx == ifp->if_index) |
| 288 | error = EEXIST17; |
| 289 | else |
| 290 | error = EBUSY16; |
| 291 | if_put(ifs); |
| 292 | break; |
| 293 | } |
| 294 | |
| 295 | error = ether_brport_isset(ifs); |
| 296 | if (error != 0) { |
| 297 | if_put(ifs); |
| 298 | break; |
| 299 | } |
| 300 | |
| 301 | /* If it's in the span list, it can't be a member. */ |
| 302 | SMR_SLIST_FOREACH_LOCKED(bif, &sc->sc_spanlist, bif_next)for ((bif) = (*(&(&sc->sc_spanlist)->smr_slh_first )); (bif) != ((void *)0); (bif) = (*(&(bif)->bif_next. smr_sle_next))) { |
| 303 | if (bif->ifp == ifs) |
| 304 | break; |
| 305 | } |
| 306 | if (bif != NULL((void *)0)) { |
| 307 | if_put(ifs); |
| 308 | error = EBUSY16; |
| 309 | break; |
| 310 | } |
| 311 | |
| 312 | bif = malloc(sizeof(*bif), M_DEVBUF2, M_NOWAIT0x0002|M_ZERO0x0008); |
| 313 | if (bif == NULL((void *)0)) { |
| 314 | if_put(ifs); |
| 315 | error = ENOMEM12; |
| 316 | break; |
| 317 | } |
| 318 | |
| 319 | NET_LOCK()do { rw_enter_write(&netlock); } while (0); |
| 320 | error = ifpromisc(ifs, 1); |
| 321 | NET_UNLOCK()do { rw_exit_write(&netlock); } while (0); |
| 322 | if (error != 0) { |
| 323 | if_put(ifs); |
| 324 | free(bif, M_DEVBUF2, sizeof(*bif)); |
| 325 | break; |
| 326 | } |
| 327 | |
| 328 | /* |
| 329 | * XXX If the NET_LOCK() or ifpromisc() calls above |
| 330 | * had to sleep, then something else could have come |
| 331 | * along and taken over ifs while the kernel lock was |
| 332 | * released. |
| 333 | */ |
| 334 | |
| 335 | bif->bridge_sc = sc; |
| 336 | bif->ifp = ifs; |
| 337 | bif->bif_flags = IFBIF_LEARNING0x0001 | IFBIF_DISCOVER0x0002; |
| 338 | SIMPLEQ_INIT(&bif->bif_brlin)do { (&bif->bif_brlin)->sqh_first = ((void *)0); (& bif->bif_brlin)->sqh_last = &(&bif->bif_brlin )->sqh_first; } while (0); |
| 339 | SIMPLEQ_INIT(&bif->bif_brlout)do { (&bif->bif_brlout)->sqh_first = ((void *)0); ( &bif->bif_brlout)->sqh_last = &(&bif->bif_brlout )->sqh_first; } while (0); |
| 340 | ifs->if_bridgeidx = ifp->if_index; |
| 341 | task_set(&bif->bif_dtask, bridge_ifdetach, bif); |
| 342 | if_detachhook_add(ifs, &bif->bif_dtask); |
| 343 | ether_brport_set(bif->ifp, &bridge_brport); |
| 344 | SMR_SLIST_INSERT_HEAD_LOCKED(&sc->sc_iflist, bif, bif_next)do { (bif)->bif_next.smr_sle_next = (&sc->sc_iflist )->smr_slh_first; do { __asm volatile("" ::: "memory"); } while (0); (&sc->sc_iflist)->smr_slh_first = (bif); } while (0); |
| 345 | break; |
| 346 | case SIOCBRDGDEL((unsigned long)0x80000000 | ((sizeof(struct ifbreq) & 0x1fff ) << 16) | ((('i')) << 8) | ((61))): |
| 347 | if ((error = suser(curproc({struct cpu_info *__ci; asm volatile("movq %%gs:%P1,%0" : "=r" (__ci) :"n" (__builtin_offsetof(struct cpu_info, ci_self))); __ci;})->ci_curproc)) != 0) |
| 348 | break; |
| 349 | error = bridge_findbif(sc, req->ifbr_ifsname, &bif); |
| 350 | if (error != 0) |
| 351 | break; |
| 352 | bridge_ifremove(bif); |
| 353 | break; |
| 354 | case SIOCBRDGIFS(((unsigned long)0x80000000|(unsigned long)0x40000000) | ((sizeof (struct ifbreq) & 0x1fff) << 16) | ((('i')) << 8) | ((66))): |
| 355 | error = bridge_bifconf(sc, (struct ifbifconf *)data); |
| 356 | break; |
| 357 | case SIOCBRDGADDS((unsigned long)0x80000000 | ((sizeof(struct ifbreq) & 0x1fff ) << 16) | ((('i')) << 8) | ((65))): |
| 358 | if ((error = suser(curproc({struct cpu_info *__ci; asm volatile("movq %%gs:%P1,%0" : "=r" (__ci) :"n" (__builtin_offsetof(struct cpu_info, ci_self))); __ci;})->ci_curproc)) != 0) |
| 359 | break; |
| 360 | ifs = if_unit(req->ifbr_ifsname); |
| 361 | if (ifs == NULL((void *)0)) { /* no such interface */ |
| 362 | error = ENOENT2; |
| 363 | break; |
| 364 | } |
| 365 | if (ifs->if_typeif_data.ifi_type != IFT_ETHER0x06) { |
| 366 | if_put(ifs); |
| 367 | error = EINVAL22; |
| 368 | break; |
| 369 | } |
| 370 | if (ifs->if_bridgeidx != 0) { |
| 371 | if (ifs->if_bridgeidx == ifp->if_index) |
| 372 | error = EEXIST17; |
| 373 | else |
| 374 | error = EBUSY16; |
| 375 | if_put(ifs); |
| 376 | break; |
| 377 | } |
| 378 | SMR_SLIST_FOREACH_LOCKED(bif, &sc->sc_spanlist, bif_next)for ((bif) = (*(&(&sc->sc_spanlist)->smr_slh_first )); (bif) != ((void *)0); (bif) = (*(&(bif)->bif_next. smr_sle_next))) { |
| 379 | if (bif->ifp == ifs) |
| 380 | break; |
| 381 | } |
| 382 | if (bif != NULL((void *)0)) { |
| 383 | if_put(ifs); |
| 384 | error = EEXIST17; |
| 385 | break; |
| 386 | } |
| 387 | bif = malloc(sizeof(*bif), M_DEVBUF2, M_NOWAIT0x0002|M_ZERO0x0008); |
| 388 | if (bif == NULL((void *)0)) { |
| 389 | if_put(ifs); |
| 390 | error = ENOMEM12; |
| 391 | break; |
| 392 | } |
| 393 | bif->bridge_sc = sc; |
| 394 | bif->ifp = ifs; |
| 395 | bif->bif_flags = IFBIF_SPAN0x0100; |
| 396 | SIMPLEQ_INIT(&bif->bif_brlin)do { (&bif->bif_brlin)->sqh_first = ((void *)0); (& bif->bif_brlin)->sqh_last = &(&bif->bif_brlin )->sqh_first; } while (0); |
| 397 | SIMPLEQ_INIT(&bif->bif_brlout)do { (&bif->bif_brlout)->sqh_first = ((void *)0); ( &bif->bif_brlout)->sqh_last = &(&bif->bif_brlout )->sqh_first; } while (0); |
| 398 | task_set(&bif->bif_dtask, bridge_spandetach, bif); |
| 399 | if_detachhook_add(ifs, &bif->bif_dtask); |
| 400 | SMR_SLIST_INSERT_HEAD_LOCKED(&sc->sc_spanlist, bif, bif_next)do { (bif)->bif_next.smr_sle_next = (&sc->sc_spanlist )->smr_slh_first; do { __asm volatile("" ::: "memory"); } while (0); (&sc->sc_spanlist)->smr_slh_first = (bif); } while (0); |
| 401 | break; |
| 402 | case SIOCBRDGDELS((unsigned long)0x80000000 | ((sizeof(struct ifbreq) & 0x1fff ) << 16) | ((('i')) << 8) | ((66))): |
| 403 | if ((error = suser(curproc({struct cpu_info *__ci; asm volatile("movq %%gs:%P1,%0" : "=r" (__ci) :"n" (__builtin_offsetof(struct cpu_info, ci_self))); __ci;})->ci_curproc)) != 0) |
| 404 | break; |
| 405 | ifs = if_unit(req->ifbr_ifsname); |
| 406 | if (ifs == NULL((void *)0)) { |
| 407 | error = ENOENT2; |
| 408 | break; |
| 409 | } |
| 410 | SMR_SLIST_FOREACH_LOCKED(bif, &sc->sc_spanlist, bif_next)for ((bif) = (*(&(&sc->sc_spanlist)->smr_slh_first )); (bif) != ((void *)0); (bif) = (*(&(bif)->bif_next. smr_sle_next))) { |
| 411 | if (bif->ifp == ifs) |
| 412 | break; |
| 413 | } |
| 414 | if_put(ifs); |
| 415 | if (bif == NULL((void *)0)) { |
| 416 | error = ESRCH3; |
| 417 | break; |
| 418 | } |
| 419 | bridge_spanremove(bif); |
| 420 | break; |
| 421 | case SIOCBRDGGIFFLGS(((unsigned long)0x80000000|(unsigned long)0x40000000) | ((sizeof (struct ifbreq) & 0x1fff) << 16) | ((('i')) << 8) | ((62))): |
| 422 | error = bridge_findbif(sc, req->ifbr_ifsname, &bif); |
| 423 | if (error != 0) |
| 424 | break; |
| 425 | req->ifbr_ifsflags = bif->bif_flags; |
| 426 | req->ifbr_portno = bif->ifp->if_index & 0xfff; |
| 427 | req->ifbr_protected = bif->bif_protected; |
| 428 | if (bif->bif_flags & IFBIF_STP0x0008) |
| 429 | bridge_bifgetstp(sc, bif, req); |
| 430 | break; |
| 431 | case SIOCBRDGSIFFLGS((unsigned long)0x80000000 | ((sizeof(struct ifbreq) & 0x1fff ) << 16) | ((('i')) << 8) | ((63))): |
| 432 | if (req->ifbr_ifsflags & IFBIF_RO_MASK0x0f00) { |
| 433 | error = EINVAL22; |
| 434 | break; |
| 435 | } |
| 436 | if ((error = suser(curproc({struct cpu_info *__ci; asm volatile("movq %%gs:%P1,%0" : "=r" (__ci) :"n" (__builtin_offsetof(struct cpu_info, ci_self))); __ci;})->ci_curproc)) != 0) |
| 437 | break; |
| 438 | error = bridge_findbif(sc, req->ifbr_ifsname, &bif); |
| 439 | if (error != 0) |
| 440 | break; |
| 441 | if (req->ifbr_ifsflags & IFBIF_STP0x0008) { |
| 442 | if ((bif->bif_flags & IFBIF_STP0x0008) == 0) { |
| 443 | /* Enable STP */ |
| 444 | if ((bif->bif_stp = bstp_add(sc->sc_stp, |
| 445 | bif->ifp)) == NULL((void *)0)) { |
| 446 | error = ENOMEM12; |
| 447 | break; |
| 448 | } |
| 449 | } else { |
| 450 | /* Update STP flags */ |
| 451 | bstp_ifsflags(bif->bif_stp, req->ifbr_ifsflags); |
| 452 | } |
| 453 | } else if (bif->bif_flags & IFBIF_STP0x0008) { |
| 454 | bstp_delete(bif->bif_stp); |
| 455 | bif->bif_stp = NULL((void *)0); |
| 456 | } |
| 457 | bif->bif_flags = req->ifbr_ifsflags; |
| 458 | break; |
| 459 | case SIOCSIFFLAGS((unsigned long)0x80000000 | ((sizeof(struct ifreq) & 0x1fff ) << 16) | ((('i')) << 8) | ((16))): |
| 460 | if ((ifp->if_flags & IFF_UP0x1) == IFF_UP0x1) |
| 461 | bridge_init(sc); |
| 462 | |
| 463 | if ((ifp->if_flags & IFF_UP0x1) == 0) |
| 464 | bridge_stop(sc); |
| 465 | |
| 466 | break; |
| 467 | case SIOCBRDGGPARAM(((unsigned long)0x80000000|(unsigned long)0x40000000) | ((sizeof (struct ifbropreq) & 0x1fff) << 16) | ((('i')) << 8) | ((88))): |
| 468 | if ((bp = bs->bs_root_port) == NULL((void *)0)) |
| 469 | brop->ifbop_root_port = 0; |
| 470 | else |
| 471 | brop->ifbop_root_port = bp->bp_ifindex; |
| 472 | brop->ifbop_maxage = bs->bs_bridge_max_age >> 8; |
| 473 | brop->ifbop_hellotime = bs->bs_bridge_htime >> 8; |
| 474 | brop->ifbop_fwddelay = bs->bs_bridge_fdelay >> 8; |
| 475 | brop->ifbop_holdcount = bs->bs_txholdcount; |
| 476 | brop->ifbop_priority = bs->bs_bridge_priority; |
| 477 | brop->ifbop_protocol = bs->bs_protover; |
| 478 | brop->ifbop_root_bridge = bs->bs_root_pv.pv_root_id; |
| 479 | brop->ifbop_root_path_cost = bs->bs_root_pv.pv_cost; |
| 480 | brop->ifbop_root_port = bs->bs_root_pv.pv_port_id; |
| 481 | brop->ifbop_desg_bridge = bs->bs_root_pv.pv_dbridge_id; |
| 482 | brop->ifbop_last_tc_time.tv_sec = bs->bs_last_tc_time.tv_sec; |
| 483 | brop->ifbop_last_tc_time.tv_usec = bs->bs_last_tc_time.tv_usec; |
| 484 | break; |
| 485 | case SIOCBRDGSIFPROT((unsigned long)0x80000000 | ((sizeof(struct ifbreq) & 0x1fff ) << 16) | ((('i')) << 8) | ((74))): |
| 486 | error = bridge_findbif(sc, req->ifbr_ifsname, &bif); |
| 487 | if (error != 0) |
| 488 | break; |
| 489 | bif->bif_protected = req->ifbr_protected; |
| 490 | break; |
| 491 | case SIOCBRDGRTS(((unsigned long)0x80000000|(unsigned long)0x40000000) | ((sizeof (struct ifbaconf) & 0x1fff) << 16) | ((('i')) << 8) | ((67))): |
| 492 | case SIOCBRDGGCACHE(((unsigned long)0x80000000|(unsigned long)0x40000000) | ((sizeof (struct ifbrparam) & 0x1fff) << 16) | ((('i')) << 8) | ((65))): |
| 493 | case SIOCBRDGGPRI(((unsigned long)0x80000000|(unsigned long)0x40000000) | ((sizeof (struct ifbrparam) & 0x1fff) << 16) | ((('i')) << 8) | ((80))): |
| 494 | case SIOCBRDGGMA(((unsigned long)0x80000000|(unsigned long)0x40000000) | ((sizeof (struct ifbrparam) & 0x1fff) << 16) | ((('i')) << 8) | ((83))): |
| 495 | case SIOCBRDGGHT(((unsigned long)0x80000000|(unsigned long)0x40000000) | ((sizeof (struct ifbrparam) & 0x1fff) << 16) | ((('i')) << 8) | ((81))): |
| 496 | case SIOCBRDGGFD(((unsigned long)0x80000000|(unsigned long)0x40000000) | ((sizeof (struct ifbrparam) & 0x1fff) << 16) | ((('i')) << 8) | ((82))): |
| 497 | case SIOCBRDGGTO(((unsigned long)0x80000000|(unsigned long)0x40000000) | ((sizeof (struct ifbrparam) & 0x1fff) << 16) | ((('i')) << 8) | ((70))): |
| 498 | case SIOCBRDGGRL(((unsigned long)0x80000000|(unsigned long)0x40000000) | ((sizeof (struct ifbrlconf) & 0x1fff) << 16) | ((('i')) << 8) | ((79))): |
| 499 | break; |
| 500 | case SIOCBRDGFLUSH((unsigned long)0x80000000 | ((sizeof(struct ifbreq) & 0x1fff ) << 16) | ((('i')) << 8) | ((72))): |
| 501 | case SIOCBRDGSADDR(((unsigned long)0x80000000|(unsigned long)0x40000000) | ((sizeof (struct ifbareq) & 0x1fff) << 16) | ((('i')) << 8) | ((68))): |
| 502 | case SIOCBRDGDADDR((unsigned long)0x80000000 | ((sizeof(struct ifbareq) & 0x1fff ) << 16) | ((('i')) << 8) | ((71))): |
| 503 | case SIOCBRDGSCACHE((unsigned long)0x80000000 | ((sizeof(struct ifbrparam) & 0x1fff) << 16) | ((('i')) << 8) | ((64))): |
| 504 | case SIOCBRDGSTO((unsigned long)0x80000000 | ((sizeof(struct ifbrparam) & 0x1fff) << 16) | ((('i')) << 8) | ((69))): |
| 505 | case SIOCBRDGARL((unsigned long)0x80000000 | ((sizeof(struct ifbrlreq) & 0x1fff ) << 16) | ((('i')) << 8) | ((77))): |
| 506 | case SIOCBRDGFRL((unsigned long)0x80000000 | ((sizeof(struct ifbrlreq) & 0x1fff ) << 16) | ((('i')) << 8) | ((78))): |
| 507 | case SIOCBRDGSPRI((unsigned long)0x80000000 | ((sizeof(struct ifbrparam) & 0x1fff) << 16) | ((('i')) << 8) | ((80))): |
| 508 | case SIOCBRDGSFD((unsigned long)0x80000000 | ((sizeof(struct ifbrparam) & 0x1fff) << 16) | ((('i')) << 8) | ((82))): |
| 509 | case SIOCBRDGSMA((unsigned long)0x80000000 | ((sizeof(struct ifbrparam) & 0x1fff) << 16) | ((('i')) << 8) | ((83))): |
| 510 | case SIOCBRDGSHT((unsigned long)0x80000000 | ((sizeof(struct ifbrparam) & 0x1fff) << 16) | ((('i')) << 8) | ((81))): |
| 511 | case SIOCBRDGSTXHC((unsigned long)0x80000000 | ((sizeof(struct ifbrparam) & 0x1fff) << 16) | ((('i')) << 8) | ((89))): |
| 512 | case SIOCBRDGSPROTO((unsigned long)0x80000000 | ((sizeof(struct ifbrparam) & 0x1fff) << 16) | ((('i')) << 8) | ((90))): |
| 513 | case SIOCBRDGSIFPRIO((unsigned long)0x80000000 | ((sizeof(struct ifbreq) & 0x1fff ) << 16) | ((('i')) << 8) | ((84))): |
| 514 | case SIOCBRDGSIFCOST((unsigned long)0x80000000 | ((sizeof(struct ifbreq) & 0x1fff ) << 16) | ((('i')) << 8) | ((85))): |
| 515 | error = suser(curproc({struct cpu_info *__ci; asm volatile("movq %%gs:%P1,%0" : "=r" (__ci) :"n" (__builtin_offsetof(struct cpu_info, ci_self))); __ci;})->ci_curproc); |
| 516 | break; |
| 517 | default: |
| 518 | error = ENOTTY25; |
| 519 | break; |
| 520 | } |
| 521 | |
| 522 | if (!error) |
| 523 | error = bridgectl_ioctl(ifp, cmd, data); |
| 524 | |
| 525 | if (!error) |
| 526 | error = bstp_ioctl(ifp, cmd, data); |
| 527 | |
| 528 | NET_LOCK()do { rw_enter_write(&netlock); } while (0); |
| 529 | return (error); |
| 530 | } |
| 531 | |
| 532 | /* Detach an interface from a bridge. */ |
| 533 | int |
| 534 | bridge_ifremove(struct bridge_iflist *bif) |
| 535 | { |
| 536 | struct bridge_softc *sc = bif->bridge_sc; |
| 537 | int error; |
| 538 | |
| 539 | SMR_SLIST_REMOVE_LOCKED(&sc->sc_iflist, bif, bridge_iflist, bif_next)do { if ((&sc->sc_iflist)->smr_slh_first == (bif)) { do { ((&sc->sc_iflist))->smr_slh_first = ((&sc ->sc_iflist))->smr_slh_first->bif_next.smr_sle_next; } while (0); } else { struct bridge_iflist *curelm = (&sc ->sc_iflist)->smr_slh_first; while (curelm->bif_next .smr_sle_next != (bif)) curelm = curelm->bif_next.smr_sle_next ; curelm->bif_next.smr_sle_next = curelm->bif_next.smr_sle_next ->bif_next.smr_sle_next; } } while (0); |
| 540 | if_detachhook_del(bif->ifp, &bif->bif_dtask); |
| 541 | ether_brport_clr(bif->ifp); |
| 542 | |
| 543 | smr_barrier()smr_barrier_impl(0); |
| 544 | |
| 545 | if (bif->bif_flags & IFBIF_STP0x0008) { |
| 546 | bstp_delete(bif->bif_stp); |
| 547 | bif->bif_stp = NULL((void *)0); |
| 548 | } |
| 549 | |
| 550 | bif->ifp->if_bridgeidx = 0; |
| 551 | NET_LOCK()do { rw_enter_write(&netlock); } while (0); |
| 552 | error = ifpromisc(bif->ifp, 0); |
| 553 | NET_UNLOCK()do { rw_exit_write(&netlock); } while (0); |
| 554 | |
| 555 | bridge_rtdelete(sc, bif->ifp, 0); |
| 556 | bridge_flushrule(bif); |
| 557 | |
| 558 | if_put(bif->ifp); |
| 559 | bif->ifp = NULL((void *)0); |
| 560 | free(bif, M_DEVBUF2, sizeof(*bif)); |
| 561 | |
| 562 | return (error); |
| 563 | } |
| 564 | |
| 565 | void |
| 566 | bridge_spanremove(struct bridge_iflist *bif) |
| 567 | { |
| 568 | struct bridge_softc *sc = bif->bridge_sc; |
| 569 | |
| 570 | SMR_SLIST_REMOVE_LOCKED(&sc->sc_spanlist, bif, bridge_iflist, bif_next)do { if ((&sc->sc_spanlist)->smr_slh_first == (bif) ) { do { ((&sc->sc_spanlist))->smr_slh_first = ((& sc->sc_spanlist))->smr_slh_first->bif_next.smr_sle_next ;} while (0); } else { struct bridge_iflist *curelm = (&sc ->sc_spanlist)->smr_slh_first; while (curelm->bif_next .smr_sle_next != (bif)) curelm = curelm->bif_next.smr_sle_next ; curelm->bif_next.smr_sle_next = curelm->bif_next.smr_sle_next ->bif_next.smr_sle_next; } } while (0); |
| 571 | if_detachhook_del(bif->ifp, &bif->bif_dtask); |
| 572 | |
| 573 | smr_barrier()smr_barrier_impl(0); |
| 574 | |
| 575 | if_put(bif->ifp); |
| 576 | bif->ifp = NULL((void *)0); |
| 577 | free(bif, M_DEVBUF2, sizeof(*bif)); |
| 578 | } |
| 579 | |
| 580 | void |
| 581 | bridge_ifdetach(void *xbif) |
| 582 | { |
| 583 | struct bridge_iflist *bif = xbif; |
| 584 | |
| 585 | /* |
| 586 | * bridge(4) detach hook doesn't need the NET_LOCK(), worst the |
| 587 | * use of smr_barrier() while holding the lock might lead to a |
| 588 | * deadlock situation. |
| 589 | */ |
| 590 | NET_UNLOCK()do { rw_exit_write(&netlock); } while (0); |
| 591 | bridge_ifremove(bif); |
| 592 | NET_LOCK()do { rw_enter_write(&netlock); } while (0); |
| 593 | } |
| 594 | |
| 595 | void |
| 596 | bridge_spandetach(void *xbif) |
| 597 | { |
| 598 | struct bridge_iflist *bif = xbif; |
| 599 | |
| 600 | /* |
| 601 | * bridge(4) detach hook doesn't need the NET_LOCK(), worst the |
| 602 | * use of smr_barrier() while holding the lock might lead to a |
| 603 | * deadlock situation. |
| 604 | */ |
| 605 | NET_UNLOCK()do { rw_exit_write(&netlock); } while (0); |
| 606 | bridge_spanremove(bif); |
| 607 | NET_LOCK()do { rw_enter_write(&netlock); } while (0); |
| 608 | } |
| 609 | |
| 610 | void |
| 611 | bridge_bifgetstp(struct bridge_softc *sc, struct bridge_iflist *bif, |
| 612 | struct ifbreq *breq) |
| 613 | { |
| 614 | struct bstp_state *bs = sc->sc_stp; |
| 615 | struct bstp_port *bp = bif->bif_stp; |
| 616 | |
| 617 | breq->ifbr_state = bstp_getstate(bs, bp); |
| 618 | breq->ifbr_priority = bp->bp_priority; |
| 619 | breq->ifbr_path_cost = bp->bp_path_cost; |
| 620 | breq->ifbr_proto = bp->bp_protover; |
| 621 | breq->ifbr_role = bp->bp_role; |
| 622 | breq->ifbr_stpflags = bp->bp_flags; |
| 623 | breq->ifbr_fwd_trans = bp->bp_forward_transitions; |
| 624 | breq->ifbr_root_bridge = bs->bs_root_pv.pv_root_id; |
| 625 | breq->ifbr_root_cost = bs->bs_root_pv.pv_cost; |
| 626 | breq->ifbr_root_port = bs->bs_root_pv.pv_port_id; |
| 627 | breq->ifbr_desg_bridge = bs->bs_root_pv.pv_dbridge_id; |
| 628 | breq->ifbr_desg_port = bs->bs_root_pv.pv_dport_id; |
| 629 | |
| 630 | /* Copy STP state options as flags */ |
| 631 | if (bp->bp_operedge) |
| 632 | breq->ifbr_ifsflags |= IFBIF_BSTP_EDGE0x0010; |
| 633 | if (bp->bp_flags & BSTP_PORT_AUTOEDGE0x0010) |
| 634 | breq->ifbr_ifsflags |= IFBIF_BSTP_AUTOEDGE0x0020; |
| 635 | if (bp->bp_ptp_link) |
| 636 | breq->ifbr_ifsflags |= IFBIF_BSTP_PTP0x0040; |
| 637 | if (bp->bp_flags & BSTP_PORT_AUTOPTP0x0020) |
| 638 | breq->ifbr_ifsflags |= IFBIF_BSTP_AUTOPTP0x0080; |
| 639 | } |
| 640 | |
| 641 | int |
| 642 | bridge_bifconf(struct bridge_softc *sc, struct ifbifconf *bifc) |
| 643 | { |
| 644 | struct bridge_iflist *bif; |
| 645 | u_int32_t total = 0, i = 0; |
| 646 | int error = 0; |
| 647 | struct ifbreq *breq, *breqs = NULL((void *)0); |
| 648 | |
| 649 | SMR_SLIST_FOREACH_LOCKED(bif, &sc->sc_iflist, bif_next)for ((bif) = (*(&(&sc->sc_iflist)->smr_slh_first )); (bif) != ((void *)0); (bif) = (*(&(bif)->bif_next. smr_sle_next))) |
| 650 | total++; |
| 651 | |
| 652 | SMR_SLIST_FOREACH_LOCKED(bif, &sc->sc_spanlist, bif_next)for ((bif) = (*(&(&sc->sc_spanlist)->smr_slh_first )); (bif) != ((void *)0); (bif) = (*(&(bif)->bif_next. smr_sle_next))) |
| 653 | total++; |
| 654 | |
| 655 | if (bifc->ifbic_len == 0) { |
| 656 | i = total; |
| 657 | goto done; |
| 658 | } |
| 659 | |
| 660 | breqs = mallocarray(total, sizeof(*breqs), M_TEMP127, M_NOWAIT0x0002|M_ZERO0x0008); |
| 661 | if (breqs == NULL((void *)0)) |
| 662 | goto done; |
| 663 | |
| 664 | SMR_SLIST_FOREACH_LOCKED(bif, &sc->sc_iflist, bif_next)for ((bif) = (*(&(&sc->sc_iflist)->smr_slh_first )); (bif) != ((void *)0); (bif) = (*(&(bif)->bif_next. smr_sle_next))) { |
| 665 | if (bifc->ifbic_len < (i + 1) * sizeof(*breqs)) |
| 666 | break; |
| 667 | breq = &breqs[i]; |
| 668 | strlcpy(breq->ifbr_name, sc->sc_if.if_xname, IFNAMSIZ16); |
| 669 | strlcpy(breq->ifbr_ifsname, bif->ifp->if_xname, IFNAMSIZ16); |
| 670 | breq->ifbr_ifsflags = bif->bif_flags; |
| 671 | breq->ifbr_portno = bif->ifp->if_index & 0xfff; |
| 672 | breq->ifbr_protected = bif->bif_protected; |
| 673 | if (bif->bif_flags & IFBIF_STP0x0008) |
| 674 | bridge_bifgetstp(sc, bif, breq); |
| 675 | i++; |
| 676 | } |
| 677 | SMR_SLIST_FOREACH_LOCKED(bif, &sc->sc_spanlist, bif_next)for ((bif) = (*(&(&sc->sc_spanlist)->smr_slh_first )); (bif) != ((void *)0); (bif) = (*(&(bif)->bif_next. smr_sle_next))) { |
| 678 | if (bifc->ifbic_len < (i + 1) * sizeof(*breqs)) |
| 679 | break; |
| 680 | breq = &breqs[i]; |
| 681 | strlcpy(breq->ifbr_name, sc->sc_if.if_xname, IFNAMSIZ16); |
| 682 | strlcpy(breq->ifbr_ifsname, bif->ifp->if_xname, IFNAMSIZ16); |
| 683 | breq->ifbr_ifsflags = bif->bif_flags | IFBIF_SPAN0x0100; |
| 684 | breq->ifbr_portno = bif->ifp->if_index & 0xfff; |
| 685 | i++; |
| 686 | } |
| 687 | |
| 688 | error = copyout(breqs, bifc->ifbic_reqifbic_ifbicu.ifbicu_req, i * sizeof(*breqs)); |
| 689 | done: |
| 690 | free(breqs, M_TEMP127, total * sizeof(*breq)); |
| 691 | bifc->ifbic_len = i * sizeof(*breq); |
| 692 | return (error); |
| 693 | } |
| 694 | |
| 695 | int |
| 696 | bridge_findbif(struct bridge_softc *sc, const char *name, |
| 697 | struct bridge_iflist **rbif) |
| 698 | { |
| 699 | struct ifnet *ifp; |
| 700 | struct bridge_iflist *bif; |
| 701 | int error = 0; |
| 702 | |
| 703 | KERNEL_ASSERT_LOCKED()((_kernel_lock_held()) ? (void)0 : __assert("diagnostic ", "/usr/src/sys/net/if_bridge.c" , 703, "_kernel_lock_held()")); |
| 704 | |
| 705 | if ((ifp = if_unit(name)) == NULL((void *)0)) |
| 706 | return (ENOENT2); |
| 707 | |
| 708 | if (ifp->if_bridgeidx != sc->sc_if.if_index) { |
| 709 | error = ESRCH3; |
| 710 | goto put; |
| 711 | } |
| 712 | |
| 713 | SMR_SLIST_FOREACH_LOCKED(bif, &sc->sc_iflist, bif_next)for ((bif) = (*(&(&sc->sc_iflist)->smr_slh_first )); (bif) != ((void *)0); (bif) = (*(&(bif)->bif_next. smr_sle_next))) { |
| 714 | if (bif->ifp == ifp) |
| 715 | break; |
| 716 | } |
| 717 | |
| 718 | if (bif == NULL((void *)0)) { |
| 719 | error = ENOENT2; |
| 720 | goto put; |
| 721 | } |
| 722 | |
| 723 | *rbif = bif; |
| 724 | put: |
| 725 | if_put(ifp); |
| 726 | |
| 727 | return (error); |
| 728 | } |
| 729 | |
| 730 | struct bridge_iflist * |
| 731 | bridge_getbif(struct ifnet *ifp) |
| 732 | { |
| 733 | struct bridge_iflist *bif; |
| 734 | struct bridge_softc *sc; |
| 735 | struct ifnet *bifp; |
| 736 | |
| 737 | KERNEL_ASSERT_LOCKED()((_kernel_lock_held()) ? (void)0 : __assert("diagnostic ", "/usr/src/sys/net/if_bridge.c" , 737, "_kernel_lock_held()")); |
| 738 | |
| 739 | bifp = if_get(ifp->if_bridgeidx); |
| 740 | if (bifp == NULL((void *)0)) |
| 741 | return (NULL((void *)0)); |
| 742 | |
| 743 | sc = bifp->if_softc; |
| 744 | SMR_SLIST_FOREACH_LOCKED(bif, &sc->sc_iflist, bif_next)for ((bif) = (*(&(&sc->sc_iflist)->smr_slh_first )); (bif) != ((void *)0); (bif) = (*(&(bif)->bif_next. smr_sle_next))) { |
| 745 | if (bif->ifp == ifp) |
| 746 | break; |
| 747 | } |
| 748 | |
| 749 | if_put(bifp); |
| 750 | |
| 751 | return (bif); |
| 752 | } |
| 753 | |
| 754 | void |
| 755 | bridge_init(struct bridge_softc *sc) |
| 756 | { |
| 757 | struct ifnet *ifp = &sc->sc_if; |
| 758 | |
| 759 | if (ISSET(ifp->if_flags, IFF_RUNNING)((ifp->if_flags) & (0x40))) |
| 760 | return; |
| 761 | |
| 762 | bstp_enable(sc->sc_stp, ifp->if_index); |
| 763 | |
| 764 | if (sc->sc_brttimeout != 0) |
| 765 | timeout_add_sec(&sc->sc_brtimeout, sc->sc_brttimeout); |
| 766 | |
| 767 | SET(ifp->if_flags, IFF_RUNNING)((ifp->if_flags) |= (0x40)); |
| 768 | } |
| 769 | |
| 770 | /* |
| 771 | * Stop the bridge and deallocate the routing table. |
| 772 | */ |
| 773 | void |
| 774 | bridge_stop(struct bridge_softc *sc) |
| 775 | { |
| 776 | struct ifnet *ifp = &sc->sc_if; |
| 777 | |
| 778 | if (!ISSET(ifp->if_flags, IFF_RUNNING)((ifp->if_flags) & (0x40))) |
| 779 | return; |
| 780 | |
| 781 | CLR(ifp->if_flags, IFF_RUNNING)((ifp->if_flags) &= ~(0x40)); |
| 782 | |
| 783 | bstp_disable(sc->sc_stp); |
| 784 | |
| 785 | timeout_del_barrier(&sc->sc_brtimeout); |
| 786 | |
| 787 | bridge_rtflush(sc, IFBF_FLUSHDYN0x0); |
| 788 | } |
| 789 | |
| 790 | /* |
| 791 | * Send output from the bridge. The mbuf has the ethernet header |
| 792 | * already attached. We must enqueue or free the mbuf before exiting. |
| 793 | */ |
| 794 | int |
| 795 | bridge_enqueue(struct ifnet *ifp, struct mbuf *m) |
| 796 | { |
| 797 | struct ifnet *brifp; |
| 798 | struct ether_header *eh; |
| 799 | struct ifnet *dst_if = NULL((void *)0); |
| 800 | unsigned int dst_ifidx = 0; |
| 801 | #if NBPFILTER1 > 0 |
| 802 | caddr_t if_bpf; |
| 803 | #endif |
| 804 | int error = 0; |
| 805 | |
| 806 | if (m->m_lenm_hdr.mh_len < sizeof(*eh)) { |
| 807 | m = m_pullup(m, sizeof(*eh)); |
| 808 | if (m == NULL((void *)0)) |
| 809 | return (ENOBUFS55); |
| 810 | } |
| 811 | |
| 812 | /* ifp must be a member interface of the bridge. */ |
| 813 | brifp = if_get(ifp->if_bridgeidx); |
| 814 | if (brifp == NULL((void *)0)) { |
| 815 | m_freem(m); |
| 816 | return (EINVAL22); |
| 817 | } |
| 818 | |
| 819 | /* |
| 820 | * If bridge is down, but original output interface is up, |
| 821 | * go ahead and send out that interface. Otherwise the packet |
| 822 | * is dropped below. |
| 823 | */ |
| 824 | if (!ISSET(brifp->if_flags, IFF_RUNNING)((brifp->if_flags) & (0x40))) { |
| 825 | /* Loop prevention. */ |
| 826 | m->m_flagsm_hdr.mh_flags |= M_PROTO10x0010; |
| 827 | error = if_enqueue(ifp, m); |
| 828 | if_put(brifp); |
| 829 | return (error); |
| 830 | } |
| 831 | |
| 832 | #if NBPFILTER1 > 0 |
| 833 | if_bpf = brifp->if_bpf; |
| 834 | if (if_bpf) |
| 835 | bpf_mtap(if_bpf, m, BPF_DIRECTION_OUT(1 << 1)); |
| 836 | #endif |
| 837 | ifp->if_opacketsif_data.ifi_opackets++; |
| 838 | ifp->if_obytesif_data.ifi_obytes += m->m_pkthdrM_dat.MH.MH_pkthdr.len; |
| 839 | |
| 840 | bridge_span(brifp, m); |
| 841 | |
| 842 | eh = mtod(m, struct ether_header *)((struct ether_header *)((m)->m_hdr.mh_data)); |
| 843 | if (!ETHER_IS_MULTICAST(eh->ether_dhost)(*(eh->ether_dhost) & 0x01)) { |
| 844 | struct ether_addr *dst; |
| 845 | |
| 846 | dst = (struct ether_addr *)&eh->ether_dhost[0]; |
| 847 | dst_ifidx = bridge_rtlookup(brifp, dst, m); |
| 848 | } |
| 849 | |
| 850 | /* |
| 851 | * If the packet is a broadcast or we don't know a better way to |
| 852 | * get there, send to all interfaces. |
| 853 | */ |
| 854 | if (dst_ifidx == 0) { |
| 855 | struct bridge_softc *sc = brifp->if_softc; |
| 856 | struct bridge_iflist *bif; |
| 857 | struct mbuf *mc; |
| 858 | |
| 859 | smr_read_enter(); |
| 860 | SMR_SLIST_FOREACH(bif, &sc->sc_iflist, bif_next)for ((bif) = ({ typeof(*&(&sc->sc_iflist)->smr_slh_first ) __tmp = *(volatile typeof(*&(&sc->sc_iflist)-> smr_slh_first) *)&(*&(&sc->sc_iflist)->smr_slh_first ); membar_datadep_consumer(); __tmp; }); (bif) != ((void *)0) ; (bif) = ({ typeof(*&(bif)->bif_next.smr_sle_next) __tmp = *(volatile typeof(*&(bif)->bif_next.smr_sle_next) * )&(*&(bif)->bif_next.smr_sle_next); membar_datadep_consumer (); __tmp; })) { |
| 861 | dst_if = bif->ifp; |
| 862 | if ((dst_if->if_flags & IFF_RUNNING0x40) == 0) |
| 863 | continue; |
| 864 | |
| 865 | /* |
| 866 | * If this is not the original output interface, |
| 867 | * and the interface is participating in spanning |
| 868 | * tree, make sure the port is in a state that |
| 869 | * allows forwarding. |
| 870 | */ |
| 871 | if (dst_if != ifp && |
| 872 | (bif->bif_flags & IFBIF_STP0x0008) && |
| 873 | (bif->bif_statebif_stp->bp_state == BSTP_IFSTATE_DISCARDING5)) |
| 874 | continue; |
| 875 | if ((bif->bif_flags & IFBIF_DISCOVER0x0002) == 0 && |
| 876 | (m->m_flagsm_hdr.mh_flags & (M_BCAST0x0100 | M_MCAST0x0200)) == 0) |
| 877 | continue; |
| 878 | |
| 879 | if (bridge_filterrule(&bif->bif_brlout, eh, m) == |
| 880 | BRL_ACTION_BLOCK0x01) |
| 881 | continue; |
| 882 | |
| 883 | mc = m_dup_pkt(m, ETHER_ALIGN2, M_NOWAIT0x0002); |
| 884 | if (mc == NULL((void *)0)) { |
| 885 | brifp->if_oerrorsif_data.ifi_oerrors++; |
| 886 | continue; |
| 887 | } |
| 888 | |
| 889 | error = bridge_ifenqueue(brifp, dst_if, mc); |
| 890 | if (error) |
| 891 | continue; |
| 892 | } |
| 893 | smr_read_leave(); |
| 894 | m_freem(m); |
| 895 | goto out; |
| 896 | } |
| 897 | |
| 898 | dst_if = if_get(dst_ifidx); |
| 899 | if ((dst_if == NULL((void *)0)) || !ISSET(dst_if->if_flags, IFF_RUNNING)((dst_if->if_flags) & (0x40))) { |
| 900 | m_freem(m); |
| 901 | if_put(dst_if); |
| 902 | error = ENETDOWN50; |
| 903 | goto out; |
| 904 | } |
| 905 | |
| 906 | bridge_ifenqueue(brifp, dst_if, m); |
| 907 | if_put(dst_if); |
| 908 | out: |
| 909 | if_put(brifp); |
| 910 | return (error); |
| 911 | } |
| 912 | |
| 913 | /* |
| 914 | * Loop through each bridge interface and process their input queues. |
| 915 | */ |
| 916 | void |
| 917 | bridgeintr(void) |
| 918 | { |
| 919 | struct mbuf_list ml; |
| 920 | struct mbuf *m; |
| 921 | struct ifnet *ifp; |
| 922 | |
| 923 | niq_delist(&bridgeintrq, &ml)mq_delist(&(&bridgeintrq)->ni_q, (&ml)); |
| 924 | if (ml_empty(&ml)((&ml)->ml_len == 0)) |
| 925 | return; |
| 926 | |
| 927 | KERNEL_LOCK()_kernel_lock(); |
| 928 | while ((m = ml_dequeue(&ml)) != NULL((void *)0)) { |
| 929 | |
| 930 | ifp = if_get(m->m_pkthdrM_dat.MH.MH_pkthdr.ph_ifidx); |
| 931 | if (ifp == NULL((void *)0)) { |
| 932 | m_freem(m); |
| 933 | continue; |
| 934 | } |
| 935 | |
| 936 | bridge_process(ifp, m); |
| 937 | |
| 938 | if_put(ifp); |
| 939 | } |
| 940 | KERNEL_UNLOCK()_kernel_unlock(); |
| 941 | } |
| 942 | |
| 943 | /* |
| 944 | * Process a single frame. Frame must be freed or queued before returning. |
| 945 | */ |
| 946 | void |
| 947 | bridgeintr_frame(struct ifnet *brifp, struct ifnet *src_if, struct mbuf *m) |
| 948 | { |
| 949 | struct bridge_softc *sc = brifp->if_softc; |
| 950 | struct ifnet *dst_if = NULL((void *)0); |
| 951 | struct bridge_iflist *bif; |
| 952 | struct ether_addr *dst, *src; |
| 953 | struct ether_header eh; |
| 954 | unsigned int dst_ifidx; |
| 955 | u_int32_t protected; |
| 956 | int len; |
| 957 | |
| 958 | |
| 959 | sc->sc_if.if_ipacketsif_data.ifi_ipackets++; |
| 960 | sc->sc_if.if_ibytesif_data.ifi_ibytes += m->m_pkthdrM_dat.MH.MH_pkthdr.len; |
| 961 | |
| 962 | bif = bridge_getbif(src_if); |
| 963 | KASSERT(bif != NULL)((bif != ((void *)0)) ? (void)0 : __assert("diagnostic ", "/usr/src/sys/net/if_bridge.c" , 963, "bif != NULL")); |
| 964 | |
| 965 | m_copydata(m, 0, ETHER_HDR_LEN((6 * 2) + 2), &eh); |
| 966 | dst = (struct ether_addr *)&eh.ether_dhost[0]; |
| 967 | src = (struct ether_addr *)&eh.ether_shost[0]; |
| 968 | |
| 969 | /* |
| 970 | * If interface is learning, and if source address |
| 971 | * is not broadcast or multicast, record its address. |
| 972 | */ |
| 973 | if ((bif->bif_flags & IFBIF_LEARNING0x0001) && |
| 974 | !ETHER_IS_MULTICAST(eh.ether_shost)(*(eh.ether_shost) & 0x01) && |
| 975 | !ETHER_IS_ANYADDR(eh.ether_shost)(((eh.ether_shost)[0] | (eh.ether_shost)[1] | (eh.ether_shost )[2] | (eh.ether_shost)[3] | (eh.ether_shost)[4] | (eh.ether_shost )[5]) == 0x00)) |
| 976 | bridge_rtupdate(sc, src, src_if, 0, IFBAF_DYNAMIC0x00, m); |
| 977 | |
| 978 | if ((bif->bif_flags & IFBIF_STP0x0008) && |
| 979 | (bif->bif_statebif_stp->bp_state == BSTP_IFSTATE_LEARNING2)) { |
| 980 | m_freem(m); |
| 981 | return; |
| 982 | } |
| 983 | |
| 984 | /* |
| 985 | * At this point, the port either doesn't participate in stp or |
| 986 | * it's in the forwarding state |
| 987 | */ |
| 988 | |
| 989 | /* |
| 990 | * If packet is unicast, destined for someone on "this" |
| 991 | * side of the bridge, drop it. |
| 992 | */ |
| 993 | if (!ETHER_IS_MULTICAST(eh.ether_dhost)(*(eh.ether_dhost) & 0x01)) { |
| 994 | dst_ifidx = bridge_rtlookup(brifp, dst, NULL((void *)0)); |
| 995 | if (dst_ifidx == src_if->if_index) { |
| 996 | m_freem(m); |
| 997 | return; |
| 998 | } |
| 999 | } else { |
| 1000 | if (ETHER_IS_BROADCAST(eh.ether_dhost)(((eh.ether_dhost)[0] & (eh.ether_dhost)[1] & (eh.ether_dhost )[2] & (eh.ether_dhost)[3] & (eh.ether_dhost)[4] & (eh.ether_dhost)[5]) == 0xff)) |
| 1001 | m->m_flagsm_hdr.mh_flags |= M_BCAST0x0100; |
| 1002 | else |
| 1003 | m->m_flagsm_hdr.mh_flags |= M_MCAST0x0200; |
| 1004 | } |
| 1005 | |
| 1006 | /* |
| 1007 | * Multicast packets get handled a little differently: |
| 1008 | * If interface is: |
| 1009 | * -link0,-link1 (default) Forward all multicast |
| 1010 | * as broadcast. |
| 1011 | * -link0,link1 Drop non-IP multicast, forward |
| 1012 | * as broadcast IP multicast. |
| 1013 | * link0,-link1 Drop IP multicast, forward as |
| 1014 | * broadcast non-IP multicast. |
| 1015 | * link0,link1 Drop all multicast. |
| 1016 | */ |
| 1017 | if (m->m_flagsm_hdr.mh_flags & M_MCAST0x0200) { |
| 1018 | if ((sc->sc_if.if_flags & |
| 1019 | (IFF_LINK00x1000 | IFF_LINK10x2000)) == |
| 1020 | (IFF_LINK00x1000 | IFF_LINK10x2000)) { |
| 1021 | m_freem(m); |
| 1022 | return; |
| 1023 | } |
| 1024 | if (sc->sc_if.if_flags & IFF_LINK00x1000 && |
| 1025 | ETHERADDR_IS_IP_MCAST(dst)((dst)->ether_addr_octet[0] == 0x01 && (dst)->ether_addr_octet [1] == 0x00 && (dst)->ether_addr_octet[2] == 0x5e)) { |
| 1026 | m_freem(m); |
| 1027 | return; |
| 1028 | } |
| 1029 | if (sc->sc_if.if_flags & IFF_LINK10x2000 && |
| 1030 | !ETHERADDR_IS_IP_MCAST(dst)((dst)->ether_addr_octet[0] == 0x01 && (dst)->ether_addr_octet [1] == 0x00 && (dst)->ether_addr_octet[2] == 0x5e)) { |
| 1031 | m_freem(m); |
| 1032 | return; |
| 1033 | } |
| 1034 | } |
| 1035 | |
| 1036 | if (bif->bif_flags & IFBIF_BLOCKNONIP0x0004 && bridge_blocknonip(&eh, m)) { |
| 1037 | m_freem(m); |
| 1038 | return; |
| 1039 | } |
| 1040 | |
| 1041 | if (bridge_filterrule(&bif->bif_brlin, &eh, m) == BRL_ACTION_BLOCK0x01) { |
| 1042 | m_freem(m); |
| 1043 | return; |
| 1044 | } |
| 1045 | m = bridge_ip(&sc->sc_if, BRIDGE_INPF_IN, src_if, &eh, m); |
| 1046 | if (m == NULL((void *)0)) |
| 1047 | return; |
| 1048 | /* |
| 1049 | * If the packet is a multicast or broadcast OR if we don't |
| 1050 | * know any better, forward it to all interfaces. |
| 1051 | */ |
| 1052 | if ((m->m_flagsm_hdr.mh_flags & (M_BCAST0x0100 | M_MCAST0x0200)) || dst_ifidx == 0) { |
| 1053 | sc->sc_if.if_imcastsif_data.ifi_imcasts++; |
| 1054 | bridge_broadcast(sc, src_if, &eh, m); |
| 1055 | return; |
| 1056 | } |
| 1057 | protected = bif->bif_protected; |
| 1058 | |
| 1059 | dst_if = if_get(dst_ifidx); |
| 1060 | if (dst_if == NULL((void *)0)) |
| 1061 | goto bad; |
| 1062 | |
| 1063 | /* |
| 1064 | * At this point, we're dealing with a unicast frame going to a |
| 1065 | * different interface |
| 1066 | */ |
| 1067 | if (!ISSET(dst_if->if_flags, IFF_RUNNING)((dst_if->if_flags) & (0x40))) |
| 1068 | goto bad; |
| 1069 | bif = bridge_getbif(dst_if); |
| 1070 | if ((bif == NULL((void *)0)) || ((bif->bif_flags & IFBIF_STP0x0008) && |
| 1071 | (bif->bif_statebif_stp->bp_state == BSTP_IFSTATE_DISCARDING5))) |
| 1072 | goto bad; |
| 1073 | /* |
| 1074 | * Do not transmit if both ports are part of the same protected |
| 1075 | * domain. |
| 1076 | */ |
| 1077 | if (protected != 0 && (protected & bif->bif_protected)) |
| 1078 | goto bad; |
| 1079 | if (bridge_filterrule(&bif->bif_brlout, &eh, m) == BRL_ACTION_BLOCK0x01) |
| 1080 | goto bad; |
| 1081 | m = bridge_ip(&sc->sc_if, BRIDGE_OUTPF_OUT, dst_if, &eh, m); |
| 1082 | if (m == NULL((void *)0)) |
| 1083 | goto bad; |
| 1084 | |
| 1085 | len = m->m_pkthdrM_dat.MH.MH_pkthdr.len; |
| 1086 | #if NVLAN1 > 0 |
| 1087 | if ((m->m_flagsm_hdr.mh_flags & M_VLANTAG0x0020) && |
| 1088 | (dst_if->if_capabilitiesif_data.ifi_capabilities & IFCAP_VLAN_HWTAGGING0x00000020) == 0) |
| 1089 | len += ETHER_VLAN_ENCAP_LEN4; |
| 1090 | #endif |
| 1091 | if ((len - ETHER_HDR_LEN((6 * 2) + 2)) > dst_if->if_mtuif_data.ifi_mtu) |
| 1092 | bridge_fragment(&sc->sc_if, dst_if, &eh, m); |
| 1093 | else { |
| 1094 | bridge_ifenqueue(&sc->sc_if, dst_if, m); |
| 1095 | } |
| 1096 | m = NULL((void *)0); |
| 1097 | bad: |
| 1098 | if_put(dst_if); |
| 1099 | m_freem(m); |
| 1100 | } |
| 1101 | |
| 1102 | /* |
| 1103 | * Return 1 if `ena' belongs to `bif', 0 otherwise. |
| 1104 | */ |
| 1105 | int |
| 1106 | bridge_ourether(struct ifnet *ifp, uint8_t *ena) |
| 1107 | { |
| 1108 | struct arpcom *ac = (struct arpcom *)ifp; |
| 1109 | |
| 1110 | if (memcmp(ac->ac_enaddr, ena, ETHER_ADDR_LEN)__builtin_memcmp((ac->ac_enaddr), (ena), (6)) == 0) |
| 1111 | return (1); |
| 1112 | |
| 1113 | #if NCARP1 > 0 |
| 1114 | if (carp_ourether(ifp, ena)) |
| 1115 | return (1); |
| 1116 | #endif |
| 1117 | |
| 1118 | return (0); |
| 1119 | } |
| 1120 | |
| 1121 | /* |
| 1122 | * Receive input from an interface. Queue the packet for bridging if its |
| 1123 | * not for us, and schedule an interrupt. |
| 1124 | */ |
| 1125 | struct mbuf * |
| 1126 | bridge_input(struct ifnet *ifp, struct mbuf *m, uint64_t dst, void *null) |
| 1127 | { |
| 1128 | KASSERT(m->m_flags & M_PKTHDR)((m->m_hdr.mh_flags & 0x0002) ? (void)0 : __assert("diagnostic " , "/usr/src/sys/net/if_bridge.c", 1128, "m->m_flags & M_PKTHDR" )); |
| 1129 | |
| 1130 | if (m->m_flagsm_hdr.mh_flags & M_PROTO10x0010) { |
| 1131 | m->m_flagsm_hdr.mh_flags &= ~M_PROTO10x0010; |
| 1132 | return (m); |
| 1133 | } |
| 1134 | |
| 1135 | niq_enqueue(&bridgeintrq, m); |
| 1136 | |
| 1137 | return (NULL((void *)0)); |
| 1138 | } |
| 1139 | |
| 1140 | void |
| 1141 | bridge_process(struct ifnet *ifp, struct mbuf *m) |
| 1142 | { |
| 1143 | struct ifnet *brifp; |
| 1144 | struct bridge_softc *sc; |
| 1145 | struct bridge_iflist *bif = NULL((void *)0), *bif0 = NULL((void *)0); |
| 1146 | struct ether_header *eh; |
| 1147 | struct mbuf *mc; |
| 1148 | #if NBPFILTER1 > 0 |
| 1149 | caddr_t if_bpf; |
| 1150 | #endif |
| 1151 | |
| 1152 | KERNEL_ASSERT_LOCKED()((_kernel_lock_held()) ? (void)0 : __assert("diagnostic ", "/usr/src/sys/net/if_bridge.c" , 1152, "_kernel_lock_held()")); |
| 1153 | |
| 1154 | brifp = if_get(ifp->if_bridgeidx); |
| 1155 | if ((brifp == NULL((void *)0)) || !ISSET(brifp->if_flags, IFF_RUNNING)((brifp->if_flags) & (0x40))) |
| 1156 | goto reenqueue; |
| 1157 | |
| 1158 | if (m->m_pkthdrM_dat.MH.MH_pkthdr.len < sizeof(*eh)) |
| 1159 | goto bad; |
| 1160 | |
| 1161 | #if NVLAN1 > 0 |
| 1162 | /* |
| 1163 | * If the underlying interface removed the VLAN header itself, |
| 1164 | * add it back. |
| 1165 | */ |
| 1166 | if (ISSET(m->m_flags, M_VLANTAG)((m->m_hdr.mh_flags) & (0x0020))) { |
| 1167 | m = vlan_inject(m, ETHERTYPE_VLAN0x8100, m->m_pkthdrM_dat.MH.MH_pkthdr.ether_vtag); |
| 1168 | if (m == NULL((void *)0)) |
| 1169 | goto bad; |
| 1170 | } |
| 1171 | #endif |
| 1172 | |
| 1173 | #if NBPFILTER1 > 0 |
| 1174 | if_bpf = brifp->if_bpf; |
| 1175 | if (if_bpf) |
| 1176 | bpf_mtap_ether(if_bpf, m, BPF_DIRECTION_IN(1 << 0)); |
| 1177 | #endif |
| 1178 | |
| 1179 | eh = mtod(m, struct ether_header *)((struct ether_header *)((m)->m_hdr.mh_data)); |
| 1180 | |
| 1181 | sc = brifp->if_softc; |
| 1182 | SMR_SLIST_FOREACH_LOCKED(bif, &sc->sc_iflist, bif_next)for ((bif) = (*(&(&sc->sc_iflist)->smr_slh_first )); (bif) != ((void *)0); (bif) = (*(&(bif)->bif_next. smr_sle_next))) { |
| 1183 | struct arpcom *ac = (struct arpcom *)bif->ifp; |
| 1184 | if (memcmp(ac->ac_enaddr, eh->ether_shost, ETHER_ADDR_LEN)__builtin_memcmp((ac->ac_enaddr), (eh->ether_shost), (6 )) == 0) |
| 1185 | goto bad; |
| 1186 | if (bif->ifp == ifp) |
| 1187 | bif0 = bif; |
| 1188 | } |
| 1189 | if (bif0 == NULL((void *)0)) |
| 1190 | goto reenqueue; |
| 1191 | |
| 1192 | bridge_span(brifp, m); |
| 1193 | |
| 1194 | if (ETHER_IS_MULTICAST(eh->ether_dhost)(*(eh->ether_dhost) & 0x01)) { |
| 1195 | /* |
| 1196 | * Reserved destination MAC addresses (01:80:C2:00:00:0x) |
| 1197 | * should not be forwarded to bridge members according to |
| 1198 | * section 7.12.6 of the 802.1D-2004 specification. The |
| 1199 | * STP destination address (as stored in bstp_etheraddr) |
| 1200 | * is the first of these. |
| 1201 | */ |
| 1202 | if (memcmp(eh->ether_dhost, bstp_etheraddr,__builtin_memcmp((eh->ether_dhost), (bstp_etheraddr), (6 - 1)) |
| 1203 | ETHER_ADDR_LEN - 1)__builtin_memcmp((eh->ether_dhost), (bstp_etheraddr), (6 - 1)) == 0) { |
| 1204 | if (eh->ether_dhost[ETHER_ADDR_LEN6 - 1] == 0) { |
| 1205 | /* STP traffic */ |
| 1206 | m = bstp_input(sc->sc_stp, bif0->bif_stp, eh, |
| 1207 | m); |
| 1208 | if (m == NULL((void *)0)) |
| 1209 | goto bad; |
| 1210 | } else if (eh->ether_dhost[ETHER_ADDR_LEN6 - 1] <= 0xf) |
| 1211 | goto bad; |
| 1212 | } |
| 1213 | |
| 1214 | /* |
| 1215 | * No need to process frames for ifs in the discarding state |
| 1216 | */ |
| 1217 | if ((bif0->bif_flags & IFBIF_STP0x0008) && |
| 1218 | (bif0->bif_statebif_stp->bp_state == BSTP_IFSTATE_DISCARDING5)) |
| 1219 | goto reenqueue; |
| 1220 | |
| 1221 | mc = m_dup_pkt(m, ETHER_ALIGN2, M_NOWAIT0x0002); |
| 1222 | if (mc == NULL((void *)0)) |
| 1223 | goto reenqueue; |
| 1224 | |
| 1225 | bridge_ifinput(ifp, mc); |
| 1226 | |
| 1227 | bridgeintr_frame(brifp, ifp, m); |
| 1228 | if_put(brifp); |
| 1229 | return; |
| 1230 | } |
| 1231 | |
| 1232 | /* |
| 1233 | * Unicast, make sure it's not for us. |
| 1234 | */ |
| 1235 | if (bridge_ourether(bif0->ifp, eh->ether_dhost)) { |
| 1236 | bif = bif0; |
| 1237 | } else { |
| 1238 | SMR_SLIST_FOREACH_LOCKED(bif, &sc->sc_iflist, bif_next)for ((bif) = (*(&(&sc->sc_iflist)->smr_slh_first )); (bif) != ((void *)0); (bif) = (*(&(bif)->bif_next. smr_sle_next))) { |
| 1239 | if (bif->ifp == ifp) |
| 1240 | continue; |
| 1241 | if (bridge_ourether(bif->ifp, eh->ether_dhost)) |
| 1242 | break; |
| 1243 | } |
| 1244 | } |
| 1245 | if (bif != NULL((void *)0)) { |
| 1246 | if (bif0->bif_flags & IFBIF_LEARNING0x0001) |
| 1247 | bridge_rtupdate(sc, |
| 1248 | (struct ether_addr *)&eh->ether_shost, |
| 1249 | ifp, 0, IFBAF_DYNAMIC0x00, m); |
| 1250 | if (bridge_filterrule(&bif0->bif_brlin, eh, m) == |
| 1251 | BRL_ACTION_BLOCK0x01) { |
| 1252 | goto bad; |
| 1253 | } |
| 1254 | |
| 1255 | /* Count for the bridge */ |
| 1256 | brifp->if_ipacketsif_data.ifi_ipackets++; |
| 1257 | brifp->if_ibytesif_data.ifi_ibytes += m->m_pkthdrM_dat.MH.MH_pkthdr.len; |
| 1258 | |
| 1259 | ifp = bif->ifp; |
| 1260 | goto reenqueue; |
| 1261 | } |
| 1262 | |
| 1263 | bridgeintr_frame(brifp, ifp, m); |
| 1264 | if_put(brifp); |
| 1265 | return; |
| 1266 | |
| 1267 | reenqueue: |
| 1268 | bridge_ifinput(ifp, m); |
| 1269 | m = NULL((void *)0); |
| 1270 | bad: |
| 1271 | m_freem(m); |
| 1272 | if_put(brifp); |
| 1273 | } |
| 1274 | |
| 1275 | /* |
| 1276 | * Send a frame to all interfaces that are members of the bridge |
| 1277 | * (except the one it came in on). |
| 1278 | */ |
| 1279 | void |
| 1280 | bridge_broadcast(struct bridge_softc *sc, struct ifnet *ifp, |
| 1281 | struct ether_header *eh, struct mbuf *m) |
| 1282 | { |
| 1283 | struct bridge_iflist *bif; |
| 1284 | struct mbuf *mc; |
| 1285 | struct ifnet *dst_if; |
| 1286 | int len, used = 0; |
| 1287 | u_int32_t protected; |
| 1288 | |
| 1289 | bif = bridge_getbif(ifp); |
| 1290 | KASSERT(bif != NULL)((bif != ((void *)0)) ? (void)0 : __assert("diagnostic ", "/usr/src/sys/net/if_bridge.c" , 1290, "bif != NULL")); |
| 1291 | protected = bif->bif_protected; |
| 1292 | |
| 1293 | SMR_SLIST_FOREACH_LOCKED(bif, &sc->sc_iflist, bif_next)for ((bif) = (*(&(&sc->sc_iflist)->smr_slh_first )); (bif) != ((void *)0); (bif) = (*(&(bif)->bif_next. smr_sle_next))) { |
| 1294 | dst_if = bif->ifp; |
| 1295 | |
| 1296 | if ((dst_if->if_flags & IFF_RUNNING0x40) == 0) |
| 1297 | continue; |
| 1298 | |
| 1299 | if ((bif->bif_flags & IFBIF_STP0x0008) && |
| 1300 | (bif->bif_statebif_stp->bp_state == BSTP_IFSTATE_DISCARDING5)) |
| 1301 | continue; |
| 1302 | |
| 1303 | if ((bif->bif_flags & IFBIF_DISCOVER0x0002) == 0 && |
| 1304 | (m->m_flagsm_hdr.mh_flags & (M_BCAST0x0100 | M_MCAST0x0200)) == 0) |
| 1305 | continue; |
| 1306 | |
| 1307 | /* Drop non-IP frames if the appropriate flag is set. */ |
| 1308 | if (bif->bif_flags & IFBIF_BLOCKNONIP0x0004 && |
| 1309 | bridge_blocknonip(eh, m)) |
| 1310 | continue; |
| 1311 | |
| 1312 | /* |
| 1313 | * Do not transmit if both ports are part of the same |
| 1314 | * protected domain. |
| 1315 | */ |
| 1316 | if (protected != 0 && (protected & bif->bif_protected)) |
| 1317 | continue; |
| 1318 | |
| 1319 | if (bridge_filterrule(&bif->bif_brlout, eh, m) == |
| 1320 | BRL_ACTION_BLOCK0x01) |
| 1321 | continue; |
| 1322 | |
| 1323 | /* |
| 1324 | * Don't retransmit out of the same interface where |
| 1325 | * the packet was received from. |
| 1326 | */ |
| 1327 | if (dst_if->if_index == ifp->if_index) |
| 1328 | continue; |
| 1329 | |
| 1330 | if (bridge_localbroadcast(dst_if, eh, m)) |
| 1331 | sc->sc_if.if_oerrorsif_data.ifi_oerrors++; |
| 1332 | |
| 1333 | /* If last one, reuse the passed-in mbuf */ |
| 1334 | if (SMR_SLIST_NEXT_LOCKED(bif, bif_next)(*(&(bif)->bif_next.smr_sle_next)) == NULL((void *)0)) { |
| 1335 | mc = m; |
| 1336 | used = 1; |
| 1337 | } else { |
| 1338 | mc = m_dup_pkt(m, ETHER_ALIGN2, M_NOWAIT0x0002); |
| 1339 | if (mc == NULL((void *)0)) { |
| 1340 | sc->sc_if.if_oerrorsif_data.ifi_oerrors++; |
| 1341 | continue; |
| 1342 | } |
| 1343 | } |
| 1344 | |
| 1345 | mc = bridge_ip(&sc->sc_if, BRIDGE_OUTPF_OUT, dst_if, eh, mc); |
| 1346 | if (mc == NULL((void *)0)) |
| 1347 | continue; |
| 1348 | |
| 1349 | len = mc->m_pkthdrM_dat.MH.MH_pkthdr.len; |
| 1350 | #if NVLAN1 > 0 |
| 1351 | if ((mc->m_flagsm_hdr.mh_flags & M_VLANTAG0x0020) && |
| 1352 | (dst_if->if_capabilitiesif_data.ifi_capabilities & IFCAP_VLAN_HWTAGGING0x00000020) == 0) |
| 1353 | len += ETHER_VLAN_ENCAP_LEN4; |
| 1354 | #endif |
| 1355 | if ((len - ETHER_HDR_LEN((6 * 2) + 2)) > dst_if->if_mtuif_data.ifi_mtu) |
| 1356 | bridge_fragment(&sc->sc_if, dst_if, eh, mc); |
| 1357 | else { |
| 1358 | bridge_ifenqueue(&sc->sc_if, dst_if, mc); |
| 1359 | } |
| 1360 | } |
| 1361 | |
| 1362 | if (!used) |
| 1363 | m_freem(m); |
| 1364 | } |
| 1365 | |
| 1366 | int |
| 1367 | bridge_localbroadcast(struct ifnet *ifp, struct ether_header *eh, |
| 1368 | struct mbuf *m) |
| 1369 | { |
| 1370 | struct mbuf *m1; |
| 1371 | u_int16_t etype; |
| 1372 | |
| 1373 | /* |
| 1374 | * quick optimisation, don't send packets up the stack if no |
| 1375 | * corresponding address has been specified. |
| 1376 | */ |
| 1377 | etype = ntohs(eh->ether_type)(__uint16_t)(__builtin_constant_p(eh->ether_type) ? (__uint16_t )(((__uint16_t)(eh->ether_type) & 0xffU) << 8 | ( (__uint16_t)(eh->ether_type) & 0xff00U) >> 8) : __swap16md (eh->ether_type)); |
| 1378 | if (!(m->m_flagsm_hdr.mh_flags & M_VLANTAG0x0020) && etype == ETHERTYPE_IP0x0800) { |
| 1379 | struct ifaddr *ifa; |
| 1380 | TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list)for((ifa) = ((&ifp->if_addrlist)->tqh_first); (ifa) != ((void *)0); (ifa) = ((ifa)->ifa_list.tqe_next)) { |
| 1381 | if (ifa->ifa_addr->sa_family == AF_INET2) |
| 1382 | break; |
| 1383 | } |
| 1384 | if (ifa == NULL((void *)0)) |
| 1385 | return (0); |
| 1386 | } |
| 1387 | |
| 1388 | m1 = m_dup_pkt(m, ETHER_ALIGN2, M_NOWAIT0x0002); |
| 1389 | if (m1 == NULL((void *)0)) |
| 1390 | return (1); |
| 1391 | |
| 1392 | #if NPF1 > 0 |
| 1393 | pf_pkt_addr_changed(m1); |
| 1394 | #endif /* NPF */ |
| 1395 | |
| 1396 | bridge_ifinput(ifp, m1); |
| 1397 | |
| 1398 | return (0); |
| 1399 | } |
| 1400 | |
| 1401 | void |
| 1402 | bridge_span(struct ifnet *brifp, struct mbuf *m) |
| 1403 | { |
| 1404 | struct bridge_softc *sc = brifp->if_softc; |
| 1405 | struct bridge_iflist *bif; |
| 1406 | struct ifnet *ifp; |
| 1407 | struct mbuf *mc; |
| 1408 | int error; |
| 1409 | |
| 1410 | smr_read_enter(); |
| 1411 | SMR_SLIST_FOREACH(bif, &sc->sc_spanlist, bif_next)for ((bif) = ({ typeof(*&(&sc->sc_spanlist)->smr_slh_first ) __tmp = *(volatile typeof(*&(&sc->sc_spanlist)-> smr_slh_first) *)&(*&(&sc->sc_spanlist)->smr_slh_first ); membar_datadep_consumer(); __tmp; }); (bif) != ((void *)0) ; (bif) = ({ typeof(*&(bif)->bif_next.smr_sle_next) __tmp = *(volatile typeof(*&(bif)->bif_next.smr_sle_next) * )&(*&(bif)->bif_next.smr_sle_next); membar_datadep_consumer (); __tmp; })) { |
| 1412 | ifp = bif->ifp; |
| 1413 | |
| 1414 | if ((ifp->if_flags & IFF_RUNNING0x40) == 0) |
| 1415 | continue; |
| 1416 | |
| 1417 | mc = m_copym(m, 0, M_COPYALL1000000000, M_DONTWAIT0x0002); |
| 1418 | if (mc == NULL((void *)0)) { |
| 1419 | brifp->if_oerrorsif_data.ifi_oerrors++; |
| 1420 | continue; |
| 1421 | } |
| 1422 | |
| 1423 | error = bridge_ifenqueue(brifp, ifp, mc); |
| 1424 | if (error) |
| 1425 | continue; |
| 1426 | } |
| 1427 | smr_read_leave(); |
| 1428 | } |
| 1429 | |
| 1430 | /* |
| 1431 | * Block non-ip frames: |
| 1432 | * Returns 0 if frame is ip, and 1 if it should be dropped. |
| 1433 | */ |
| 1434 | int |
| 1435 | bridge_blocknonip(struct ether_header *eh, struct mbuf *m) |
| 1436 | { |
| 1437 | struct llc llc; |
| 1438 | u_int16_t etype; |
| 1439 | |
| 1440 | if (m->m_pkthdrM_dat.MH.MH_pkthdr.len < ETHER_HDR_LEN((6 * 2) + 2)) |
| 1441 | return (1); |
| 1442 | |
| 1443 | #if NVLAN1 > 0 |
| 1444 | if (m->m_flagsm_hdr.mh_flags & M_VLANTAG0x0020) |
| 1445 | return (1); |
| 1446 | #endif |
| 1447 | |
| 1448 | etype = ntohs(eh->ether_type)(__uint16_t)(__builtin_constant_p(eh->ether_type) ? (__uint16_t )(((__uint16_t)(eh->ether_type) & 0xffU) << 8 | ( (__uint16_t)(eh->ether_type) & 0xff00U) >> 8) : __swap16md (eh->ether_type)); |
| 1449 | switch (etype) { |
| 1450 | case ETHERTYPE_ARP0x0806: |
| 1451 | case ETHERTYPE_REVARP0x8035: |
| 1452 | case ETHERTYPE_IP0x0800: |
| 1453 | case ETHERTYPE_IPV60x86DD: |
| 1454 | return (0); |
| 1455 | } |
| 1456 | |
| 1457 | if (etype > ETHERMTU(1518 - ((6 * 2) + 2) - 4)) |
| 1458 | return (1); |
| 1459 | |
| 1460 | if (m->m_pkthdrM_dat.MH.MH_pkthdr.len < |
| 1461 | (ETHER_HDR_LEN((6 * 2) + 2) + LLC_SNAPFRAMELEN8)) |
| 1462 | return (1); |
| 1463 | |
| 1464 | m_copydata(m, ETHER_HDR_LEN((6 * 2) + 2), LLC_SNAPFRAMELEN8, &llc); |
| 1465 | |
| 1466 | etype = ntohs(llc.llc_snap.ether_type)(__uint16_t)(__builtin_constant_p(llc.llc_un.type_snap.ether_type ) ? (__uint16_t)(((__uint16_t)(llc.llc_un.type_snap.ether_type ) & 0xffU) << 8 | ((__uint16_t)(llc.llc_un.type_snap .ether_type) & 0xff00U) >> 8) : __swap16md(llc.llc_un .type_snap.ether_type)); |
| 1467 | if (llc.llc_dsap == LLC_SNAP_LSAP0xaa && |
| 1468 | llc.llc_ssap == LLC_SNAP_LSAP0xaa && |
| 1469 | llc.llc_controlllc_un.type_u.control == LLC_UI0x3 && |
| 1470 | llc.llc_snapllc_un.type_snap.org_code[0] == 0 && |
| 1471 | llc.llc_snapllc_un.type_snap.org_code[1] == 0 && |
| 1472 | llc.llc_snapllc_un.type_snap.org_code[2] == 0 && |
| 1473 | (etype == ETHERTYPE_ARP0x0806 || etype == ETHERTYPE_REVARP0x8035 || |
| 1474 | etype == ETHERTYPE_IP0x0800 || etype == ETHERTYPE_IPV60x86DD)) { |
| 1475 | return (0); |
| 1476 | } |
| 1477 | |
| 1478 | return (1); |
| 1479 | } |
| 1480 | |
| 1481 | #ifdef IPSEC1 |
| 1482 | int |
| 1483 | bridge_ipsec(struct ifnet *ifp, struct ether_header *eh, int hassnap, |
| 1484 | struct llc *llc, int dir, int af, int hlen, struct mbuf *m) |
| 1485 | { |
| 1486 | union sockaddr_union dst; |
| 1487 | struct tdb *tdb; |
| 1488 | u_int32_t spi; |
| 1489 | u_int16_t cpi; |
| 1490 | int error, off, prot; |
| 1491 | u_int8_t proto = 0; |
| 1492 | struct ip *ip; |
| 1493 | #ifdef INET61 |
| 1494 | struct ip6_hdr *ip6; |
| 1495 | #endif /* INET6 */ |
| 1496 | #if NPF1 > 0 |
| 1497 | struct ifnet *encif; |
| 1498 | #endif |
| 1499 | |
| 1500 | if (dir == BRIDGE_INPF_IN) { |
| 1501 | switch (af) { |
| 1502 | case AF_INET2: |
| 1503 | if (m->m_pkthdrM_dat.MH.MH_pkthdr.len - hlen < 2 * sizeof(u_int32_t)) |
| 1504 | goto skiplookup; |
| 1505 | |
| 1506 | ip = mtod(m, struct ip *)((struct ip *)((m)->m_hdr.mh_data)); |
| 1507 | proto = ip->ip_p; |
| 1508 | off = offsetof(struct ip, ip_p)__builtin_offsetof(struct ip, ip_p); |
| 1509 | |
| 1510 | if (proto != IPPROTO_ESP50 && proto != IPPROTO_AH51 && |
| 1511 | proto != IPPROTO_IPCOMP108) |
| 1512 | goto skiplookup; |
| 1513 | |
| 1514 | bzero(&dst, sizeof(union sockaddr_union))__builtin_bzero((&dst), (sizeof(union sockaddr_union))); |
| 1515 | dst.sa.sa_family = AF_INET2; |
| 1516 | dst.sin.sin_len = sizeof(struct sockaddr_in); |
| 1517 | m_copydata(m, offsetof(struct ip, ip_dst)__builtin_offsetof(struct ip, ip_dst), |
| 1518 | sizeof(struct in_addr), &dst.sin.sin_addr); |
| 1519 | |
| 1520 | break; |
| 1521 | #ifdef INET61 |
| 1522 | case AF_INET624: |
| 1523 | if (m->m_pkthdrM_dat.MH.MH_pkthdr.len - hlen < 2 * sizeof(u_int32_t)) |
| 1524 | goto skiplookup; |
| 1525 | |
| 1526 | ip6 = mtod(m, struct ip6_hdr *)((struct ip6_hdr *)((m)->m_hdr.mh_data)); |
| 1527 | |
| 1528 | /* XXX We should chase down the header chain */ |
| 1529 | proto = ip6->ip6_nxtip6_ctlun.ip6_un1.ip6_un1_nxt; |
| 1530 | off = offsetof(struct ip6_hdr, ip6_nxt)__builtin_offsetof(struct ip6_hdr, ip6_ctlun.ip6_un1.ip6_un1_nxt ); |
| 1531 | |
| 1532 | if (proto != IPPROTO_ESP50 && proto != IPPROTO_AH51 && |
| 1533 | proto != IPPROTO_IPCOMP108) |
| 1534 | goto skiplookup; |
| 1535 | |
| 1536 | bzero(&dst, sizeof(union sockaddr_union))__builtin_bzero((&dst), (sizeof(union sockaddr_union))); |
| 1537 | dst.sa.sa_family = AF_INET624; |
| 1538 | dst.sin6.sin6_len = sizeof(struct sockaddr_in6); |
| 1539 | m_copydata(m, offsetof(struct ip6_hdr, ip6_dst)__builtin_offsetof(struct ip6_hdr, ip6_dst), |
| 1540 | sizeof(struct in6_addr), &dst.sin6.sin6_addr); |
| 1541 | |
| 1542 | break; |
| 1543 | #endif /* INET6 */ |
| 1544 | default: |
| 1545 | return (0); |
| 1546 | } |
| 1547 | |
| 1548 | switch (proto) { |
| 1549 | case IPPROTO_ESP50: |
| 1550 | m_copydata(m, hlen, sizeof(u_int32_t), &spi); |
| 1551 | break; |
| 1552 | case IPPROTO_AH51: |
| 1553 | m_copydata(m, hlen + sizeof(u_int32_t), |
| 1554 | sizeof(u_int32_t), &spi); |
| 1555 | break; |
| 1556 | case IPPROTO_IPCOMP108: |
| 1557 | m_copydata(m, hlen + sizeof(u_int16_t), |
| 1558 | sizeof(u_int16_t), &cpi); |
| 1559 | spi = htonl(ntohs(cpi))(__uint32_t)(__builtin_constant_p((__uint16_t)(__builtin_constant_p (cpi) ? (__uint16_t)(((__uint16_t)(cpi) & 0xffU) << 8 | ((__uint16_t)(cpi) & 0xff00U) >> 8) : __swap16md (cpi))) ? (__uint32_t)(((__uint32_t)((__uint16_t)(__builtin_constant_p (cpi) ? (__uint16_t)(((__uint16_t)(cpi) & 0xffU) << 8 | ((__uint16_t)(cpi) & 0xff00U) >> 8) : __swap16md (cpi))) & 0xff) << 24 | ((__uint32_t)((__uint16_t)( __builtin_constant_p(cpi) ? (__uint16_t)(((__uint16_t)(cpi) & 0xffU) << 8 | ((__uint16_t)(cpi) & 0xff00U) >> 8) : __swap16md(cpi))) & 0xff00) << 8 | ((__uint32_t )((__uint16_t)(__builtin_constant_p(cpi) ? (__uint16_t)(((__uint16_t )(cpi) & 0xffU) << 8 | ((__uint16_t)(cpi) & 0xff00U ) >> 8) : __swap16md(cpi))) & 0xff0000) >> 8 | ((__uint32_t)((__uint16_t)(__builtin_constant_p(cpi) ? (__uint16_t )(((__uint16_t)(cpi) & 0xffU) << 8 | ((__uint16_t)( cpi) & 0xff00U) >> 8) : __swap16md(cpi))) & 0xff000000 ) >> 24) : __swap32md((__uint16_t)(__builtin_constant_p (cpi) ? (__uint16_t)(((__uint16_t)(cpi) & 0xffU) << 8 | ((__uint16_t)(cpi) & 0xff00U) >> 8) : __swap16md (cpi)))); |
| 1560 | break; |
| 1561 | } |
| 1562 | |
| 1563 | NET_ASSERT_LOCKED()do { int _s = rw_status(&netlock); if ((splassert_ctl > 0) && (_s != 0x0001UL && _s != 0x0002UL)) splassert_fail (0x0002UL, _s, __func__); } while (0); |
| 1564 | |
| 1565 | tdb = gettdb(ifp->if_rdomain, spi, &dst, proto)gettdb_dir((ifp->if_data.ifi_rdomain),(spi),(&dst),(proto ),0); |
| 1566 | if (tdb != NULL((void *)0) && (tdb->tdb_flags & TDBF_INVALID0x00010) == 0 && |
| 1567 | tdb->tdb_xform != NULL((void *)0)) { |
| 1568 | if (tdb->tdb_first_use == 0) { |
| 1569 | tdb->tdb_first_use = gettime(); |
| 1570 | if (tdb->tdb_flags & TDBF_FIRSTUSE0x00020) { |
| 1571 | if (timeout_add_sec( |
| 1572 | &tdb->tdb_first_tmo, |
| 1573 | tdb->tdb_exp_first_use)) |
| 1574 | tdb_ref(tdb); |
| 1575 | } |
| 1576 | if (tdb->tdb_flags & TDBF_SOFT_FIRSTUSE0x00400) { |
| 1577 | if (timeout_add_sec( |
| 1578 | &tdb->tdb_sfirst_tmo, |
| 1579 | tdb->tdb_soft_first_use)) |
| 1580 | tdb_ref(tdb); |
| 1581 | } |
| 1582 | } |
| 1583 | |
| 1584 | prot = (*(tdb->tdb_xform->xf_input))(&m, tdb, hlen, |
| 1585 | off); |
| 1586 | tdb_unref(tdb); |
| 1587 | if (prot != IPPROTO_DONE257) |
| 1588 | ip_deliver(&m, &hlen, prot, af); |
| 1589 | return (1); |
| 1590 | } else { |
| 1591 | tdb_unref(tdb); |
| 1592 | skiplookup: |
| 1593 | /* XXX do an input policy lookup */ |
| 1594 | return (0); |
| 1595 | } |
| 1596 | } else { /* Outgoing from the bridge. */ |
| 1597 | error = ipsp_spd_lookup(m, af, hlen, IPSP_DIRECTION_OUT0x2, |
| 1598 | NULL((void *)0), NULL((void *)0), &tdb, NULL((void *)0)); |
| 1599 | if (error == 0 && tdb != NULL((void *)0)) { |
| 1600 | /* |
| 1601 | * We don't need to do loop detection, the |
| 1602 | * bridge will do that for us. |
| 1603 | */ |
| 1604 | #if NPF1 > 0 |
| 1605 | if ((encif = enc_getif(tdb->tdb_rdomain, |
| 1606 | tdb->tdb_tap)) == NULL((void *)0) || |
| 1607 | pf_test(af, dir, encif, &m) != PF_PASS) { |
| 1608 | m_freem(m); |
| 1609 | tdb_unref(tdb); |
| 1610 | return (1); |
| 1611 | } |
| 1612 | if (m == NULL((void *)0)) { |
| 1613 | tdb_unref(tdb); |
| 1614 | return (1); |
| 1615 | } |
| 1616 | if (af == AF_INET2) |
| 1617 | in_proto_cksum_out(m, encif); |
| 1618 | #ifdef INET61 |
| 1619 | else if (af == AF_INET624) |
| 1620 | in6_proto_cksum_out(m, encif); |
| 1621 | #endif /* INET6 */ |
| 1622 | #endif /* NPF */ |
| 1623 | |
| 1624 | ip = mtod(m, struct ip *)((struct ip *)((m)->m_hdr.mh_data)); |
| 1625 | if ((af == AF_INET2) && |
| 1626 | ip_mtudisc && (ip->ip_off & htons(IP_DF)(__uint16_t)(__builtin_constant_p(0x4000) ? (__uint16_t)(((__uint16_t )(0x4000) & 0xffU) << 8 | ((__uint16_t)(0x4000) & 0xff00U) >> 8) : __swap16md(0x4000))) && |
| 1627 | tdb->tdb_mtu && ntohs(ip->ip_len)(__uint16_t)(__builtin_constant_p(ip->ip_len) ? (__uint16_t )(((__uint16_t)(ip->ip_len) & 0xffU) << 8 | ((__uint16_t )(ip->ip_len) & 0xff00U) >> 8) : __swap16md(ip-> ip_len)) > tdb->tdb_mtu && |
| 1628 | tdb->tdb_mtutimeout > gettime()) { |
| 1629 | bridge_send_icmp_err(ifp, eh, m, |
| 1630 | hassnap, llc, tdb->tdb_mtu, |
| 1631 | ICMP_UNREACH3, ICMP_UNREACH_NEEDFRAG4); |
| 1632 | } else { |
| 1633 | KERNEL_LOCK()_kernel_lock(); |
| 1634 | error = ipsp_process_packet(m, tdb, af, 0); |
Value stored to 'error' is never read | |
| 1635 | KERNEL_UNLOCK()_kernel_unlock(); |
| 1636 | } |
| 1637 | tdb_unref(tdb); |
| 1638 | return (1); |
| 1639 | } else |
| 1640 | return (0); |
| 1641 | } |
| 1642 | |
| 1643 | return (0); |
| 1644 | } |
| 1645 | #endif /* IPSEC */ |
| 1646 | |
| 1647 | /* |
| 1648 | * Filter IP packets by peeking into the ethernet frame. This violates |
| 1649 | * the ISO model, but allows us to act as a IP filter at the data link |
| 1650 | * layer. As a result, most of this code will look familiar to those |
| 1651 | * who've read net/if_ethersubr.c and netinet/ip_input.c |
| 1652 | */ |
| 1653 | struct mbuf * |
| 1654 | bridge_ip(struct ifnet *brifp, int dir, struct ifnet *ifp, |
| 1655 | struct ether_header *eh, struct mbuf *m) |
| 1656 | { |
| 1657 | struct llc llc; |
| 1658 | int hassnap = 0; |
| 1659 | struct ip *ip; |
| 1660 | int hlen; |
| 1661 | u_int16_t etype; |
| 1662 | |
| 1663 | #if NVLAN1 > 0 |
| 1664 | if (m->m_flagsm_hdr.mh_flags & M_VLANTAG0x0020) |
| 1665 | return (m); |
| 1666 | #endif |
| 1667 | |
| 1668 | etype = ntohs(eh->ether_type)(__uint16_t)(__builtin_constant_p(eh->ether_type) ? (__uint16_t )(((__uint16_t)(eh->ether_type) & 0xffU) << 8 | ( (__uint16_t)(eh->ether_type) & 0xff00U) >> 8) : __swap16md (eh->ether_type)); |
| 1669 | |
| 1670 | if (etype != ETHERTYPE_IP0x0800 && etype != ETHERTYPE_IPV60x86DD) { |
| 1671 | if (etype > ETHERMTU(1518 - ((6 * 2) + 2) - 4) || |
| 1672 | m->m_pkthdrM_dat.MH.MH_pkthdr.len < (LLC_SNAPFRAMELEN8 + |
| 1673 | ETHER_HDR_LEN((6 * 2) + 2))) |
| 1674 | return (m); |
| 1675 | |
| 1676 | m_copydata(m, ETHER_HDR_LEN((6 * 2) + 2), LLC_SNAPFRAMELEN8, &llc); |
| 1677 | |
| 1678 | if (llc.llc_dsap != LLC_SNAP_LSAP0xaa || |
| 1679 | llc.llc_ssap != LLC_SNAP_LSAP0xaa || |
| 1680 | llc.llc_controlllc_un.type_u.control != LLC_UI0x3 || |
| 1681 | llc.llc_snapllc_un.type_snap.org_code[0] || |
| 1682 | llc.llc_snapllc_un.type_snap.org_code[1] || |
| 1683 | llc.llc_snapllc_un.type_snap.org_code[2]) |
| 1684 | return (m); |
| 1685 | |
| 1686 | etype = ntohs(llc.llc_snap.ether_type)(__uint16_t)(__builtin_constant_p(llc.llc_un.type_snap.ether_type ) ? (__uint16_t)(((__uint16_t)(llc.llc_un.type_snap.ether_type ) & 0xffU) << 8 | ((__uint16_t)(llc.llc_un.type_snap .ether_type) & 0xff00U) >> 8) : __swap16md(llc.llc_un .type_snap.ether_type)); |
| 1687 | if (etype != ETHERTYPE_IP0x0800 && etype != ETHERTYPE_IPV60x86DD) |
| 1688 | return (m); |
| 1689 | hassnap = 1; |
| 1690 | } |
| 1691 | |
| 1692 | m_adj(m, ETHER_HDR_LEN((6 * 2) + 2)); |
| 1693 | if (hassnap) |
| 1694 | m_adj(m, LLC_SNAPFRAMELEN8); |
| 1695 | |
| 1696 | switch (etype) { |
| 1697 | |
| 1698 | case ETHERTYPE_IP0x0800: |
| 1699 | m = ipv4_check(ifp, m); |
| 1700 | if (m == NULL((void *)0)) |
| 1701 | return (NULL((void *)0)); |
| 1702 | |
| 1703 | ip = mtod(m, struct ip *)((struct ip *)((m)->m_hdr.mh_data)); |
| 1704 | hlen = ip->ip_hl << 2; |
| 1705 | |
| 1706 | #ifdef IPSEC1 |
| 1707 | if ((brifp->if_flags & IFF_LINK20x4000) == IFF_LINK20x4000 && |
| 1708 | bridge_ipsec(ifp, eh, hassnap, &llc, dir, AF_INET2, hlen, m)) |
| 1709 | return (NULL((void *)0)); |
| 1710 | #endif /* IPSEC */ |
| 1711 | #if NPF1 > 0 |
| 1712 | /* Finally, we get to filter the packet! */ |
| 1713 | if (pf_test(AF_INET2, dir, ifp, &m) != PF_PASS) |
| 1714 | goto dropit; |
| 1715 | if (m == NULL((void *)0)) |
| 1716 | goto dropit; |
| 1717 | #endif /* NPF > 0 */ |
| 1718 | |
| 1719 | /* Rebuild the IP header */ |
| 1720 | if (m->m_lenm_hdr.mh_len < hlen && ((m = m_pullup(m, hlen)) == NULL((void *)0))) |
| 1721 | return (NULL((void *)0)); |
| 1722 | if (m->m_lenm_hdr.mh_len < sizeof(struct ip)) |
| 1723 | goto dropit; |
| 1724 | in_proto_cksum_out(m, ifp); |
| 1725 | ip = mtod(m, struct ip *)((struct ip *)((m)->m_hdr.mh_data)); |
| 1726 | ip->ip_sum = 0; |
| 1727 | if (0 && (ifp->if_capabilitiesif_data.ifi_capabilities & IFCAP_CSUM_IPv40x00000001)) |
| 1728 | m->m_pkthdrM_dat.MH.MH_pkthdr.csum_flags |= M_IPV4_CSUM_OUT0x0001; |
| 1729 | else { |
| 1730 | ipstat_inc(ips_outswcsum); |
| 1731 | ip->ip_sum = in_cksum(m, hlen); |
| 1732 | } |
| 1733 | |
| 1734 | #if NPF1 > 0 |
| 1735 | if (dir == BRIDGE_INPF_IN && |
| 1736 | m->m_pkthdrM_dat.MH.MH_pkthdr.pf.flags & PF_TAG_DIVERTED0x08) { |
| 1737 | m_resethdr(m); |
| 1738 | m->m_pkthdrM_dat.MH.MH_pkthdr.ph_ifidx = ifp->if_index; |
| 1739 | m->m_pkthdrM_dat.MH.MH_pkthdr.ph_rtableid = ifp->if_rdomainif_data.ifi_rdomain; |
| 1740 | ipv4_input(ifp, m); |
| 1741 | return (NULL((void *)0)); |
| 1742 | } |
| 1743 | #endif /* NPF > 0 */ |
| 1744 | |
| 1745 | break; |
| 1746 | |
| 1747 | #ifdef INET61 |
| 1748 | case ETHERTYPE_IPV60x86DD: |
| 1749 | m = ipv6_check(ifp, m); |
| 1750 | if (m == NULL((void *)0)) |
| 1751 | return (NULL((void *)0)); |
| 1752 | |
| 1753 | #ifdef IPSEC1 |
| 1754 | hlen = sizeof(struct ip6_hdr); |
| 1755 | |
| 1756 | if ((brifp->if_flags & IFF_LINK20x4000) == IFF_LINK20x4000 && |
| 1757 | bridge_ipsec(ifp, eh, hassnap, &llc, dir, AF_INET624, hlen, |
| 1758 | m)) |
| 1759 | return (NULL((void *)0)); |
| 1760 | #endif /* IPSEC */ |
| 1761 | |
| 1762 | #if NPF1 > 0 |
| 1763 | if (pf_test(AF_INET624, dir, ifp, &m) != PF_PASS) |
| 1764 | goto dropit; |
| 1765 | if (m == NULL((void *)0)) |
| 1766 | return (NULL((void *)0)); |
| 1767 | #endif /* NPF > 0 */ |
| 1768 | in6_proto_cksum_out(m, ifp); |
| 1769 | |
| 1770 | #if NPF1 > 0 |
| 1771 | if (dir == BRIDGE_INPF_IN && |
| 1772 | m->m_pkthdrM_dat.MH.MH_pkthdr.pf.flags & PF_TAG_DIVERTED0x08) { |
| 1773 | m_resethdr(m); |
| 1774 | m->m_pkthdrM_dat.MH.MH_pkthdr.ph_ifidx = ifp->if_index; |
| 1775 | m->m_pkthdrM_dat.MH.MH_pkthdr.ph_rtableid = ifp->if_rdomainif_data.ifi_rdomain; |
| 1776 | ipv6_input(ifp, m); |
| 1777 | return (NULL((void *)0)); |
| 1778 | } |
| 1779 | #endif /* NPF > 0 */ |
| 1780 | |
| 1781 | break; |
| 1782 | #endif /* INET6 */ |
| 1783 | |
| 1784 | default: |
| 1785 | goto dropit; |
| 1786 | break; |
| 1787 | } |
| 1788 | |
| 1789 | /* Reattach SNAP header */ |
| 1790 | if (hassnap) { |
| 1791 | M_PREPEND(m, LLC_SNAPFRAMELEN, M_DONTWAIT)(m) = m_prepend((m), (8), (0x0002)); |
| 1792 | if (m == NULL((void *)0)) |
| 1793 | goto dropit; |
| 1794 | bcopy(&llc, mtod(m, caddr_t)((caddr_t)((m)->m_hdr.mh_data)), LLC_SNAPFRAMELEN8); |
| 1795 | } |
| 1796 | |
| 1797 | /* Reattach ethernet header */ |
| 1798 | M_PREPEND(m, sizeof(*eh), M_DONTWAIT)(m) = m_prepend((m), (sizeof(*eh)), (0x0002)); |
| 1799 | if (m == NULL((void *)0)) |
| 1800 | goto dropit; |
| 1801 | bcopy(eh, mtod(m, caddr_t)((caddr_t)((m)->m_hdr.mh_data)), sizeof(*eh)); |
| 1802 | |
| 1803 | return (m); |
| 1804 | |
| 1805 | dropit: |
| 1806 | m_freem(m); |
| 1807 | return (NULL((void *)0)); |
| 1808 | } |
| 1809 | |
| 1810 | void |
| 1811 | bridge_fragment(struct ifnet *brifp, struct ifnet *ifp, struct ether_header *eh, |
| 1812 | struct mbuf *m) |
| 1813 | { |
| 1814 | struct llc llc; |
| 1815 | struct mbuf_list fml; |
| 1816 | int error = 0; |
| 1817 | int hassnap = 0; |
| 1818 | u_int16_t etype; |
| 1819 | struct ip *ip; |
| 1820 | |
| 1821 | etype = ntohs(eh->ether_type)(__uint16_t)(__builtin_constant_p(eh->ether_type) ? (__uint16_t )(((__uint16_t)(eh->ether_type) & 0xffU) << 8 | ( (__uint16_t)(eh->ether_type) & 0xff00U) >> 8) : __swap16md (eh->ether_type)); |
| 1822 | #if NVLAN1 > 0 |
| 1823 | if ((m->m_flagsm_hdr.mh_flags & M_VLANTAG0x0020) || etype == ETHERTYPE_VLAN0x8100 || |
| 1824 | etype == ETHERTYPE_QINQ0x88A8) { |
| 1825 | int len = m->m_pkthdrM_dat.MH.MH_pkthdr.len; |
| 1826 | |
| 1827 | if (m->m_flagsm_hdr.mh_flags & M_VLANTAG0x0020) |
| 1828 | len += ETHER_VLAN_ENCAP_LEN4; |
| 1829 | if ((ifp->if_capabilitiesif_data.ifi_capabilities & IFCAP_VLAN_MTU0x00000010) && |
| 1830 | (len - sizeof(struct ether_vlan_header) <= ifp->if_mtuif_data.ifi_mtu)) { |
| 1831 | bridge_ifenqueue(brifp, ifp, m); |
| 1832 | return; |
| 1833 | } |
| 1834 | goto dropit; |
| 1835 | } |
| 1836 | #endif |
| 1837 | if (etype != ETHERTYPE_IP0x0800) { |
| 1838 | if (etype > ETHERMTU(1518 - ((6 * 2) + 2) - 4) || |
| 1839 | m->m_pkthdrM_dat.MH.MH_pkthdr.len < (LLC_SNAPFRAMELEN8 + |
| 1840 | ETHER_HDR_LEN((6 * 2) + 2))) |
| 1841 | goto dropit; |
| 1842 | |
| 1843 | m_copydata(m, ETHER_HDR_LEN((6 * 2) + 2), LLC_SNAPFRAMELEN8, &llc); |
| 1844 | |
| 1845 | if (llc.llc_dsap != LLC_SNAP_LSAP0xaa || |
| 1846 | llc.llc_ssap != LLC_SNAP_LSAP0xaa || |
| 1847 | llc.llc_controlllc_un.type_u.control != LLC_UI0x3 || |
| 1848 | llc.llc_snapllc_un.type_snap.org_code[0] || |
| 1849 | llc.llc_snapllc_un.type_snap.org_code[1] || |
| 1850 | llc.llc_snapllc_un.type_snap.org_code[2] || |
| 1851 | llc.llc_snapllc_un.type_snap.ether_type != htons(ETHERTYPE_IP)(__uint16_t)(__builtin_constant_p(0x0800) ? (__uint16_t)(((__uint16_t )(0x0800) & 0xffU) << 8 | ((__uint16_t)(0x0800) & 0xff00U) >> 8) : __swap16md(0x0800))) |
| 1852 | goto dropit; |
| 1853 | |
| 1854 | hassnap = 1; |
| 1855 | } |
| 1856 | |
| 1857 | m_adj(m, ETHER_HDR_LEN((6 * 2) + 2)); |
| 1858 | if (hassnap) |
| 1859 | m_adj(m, LLC_SNAPFRAMELEN8); |
| 1860 | |
| 1861 | if (m->m_lenm_hdr.mh_len < sizeof(struct ip) && |
| 1862 | (m = m_pullup(m, sizeof(struct ip))) == NULL((void *)0)) |
| 1863 | goto dropit; |
| 1864 | ip = mtod(m, struct ip *)((struct ip *)((m)->m_hdr.mh_data)); |
| 1865 | |
| 1866 | /* Respect IP_DF, return a ICMP_UNREACH_NEEDFRAG. */ |
| 1867 | if (ip->ip_off & htons(IP_DF)(__uint16_t)(__builtin_constant_p(0x4000) ? (__uint16_t)(((__uint16_t )(0x4000) & 0xffU) << 8 | ((__uint16_t)(0x4000) & 0xff00U) >> 8) : __swap16md(0x4000))) { |
| 1868 | bridge_send_icmp_err(ifp, eh, m, hassnap, &llc, |
| 1869 | ifp->if_mtuif_data.ifi_mtu, ICMP_UNREACH3, ICMP_UNREACH_NEEDFRAG4); |
| 1870 | return; |
| 1871 | } |
| 1872 | |
| 1873 | error = ip_fragment(m, &fml, ifp, ifp->if_mtuif_data.ifi_mtu); |
| 1874 | if (error) |
| 1875 | return; |
| 1876 | |
| 1877 | while ((m = ml_dequeue(&fml)) != NULL((void *)0)) { |
| 1878 | if (hassnap) { |
| 1879 | M_PREPEND(m, LLC_SNAPFRAMELEN, M_DONTWAIT)(m) = m_prepend((m), (8), (0x0002)); |
| 1880 | if (m == NULL((void *)0)) { |
| 1881 | error = ENOBUFS55; |
| 1882 | break; |
| 1883 | } |
| 1884 | bcopy(&llc, mtod(m, caddr_t)((caddr_t)((m)->m_hdr.mh_data)), LLC_SNAPFRAMELEN8); |
| 1885 | } |
| 1886 | M_PREPEND(m, sizeof(*eh), M_DONTWAIT)(m) = m_prepend((m), (sizeof(*eh)), (0x0002)); |
| 1887 | if (m == NULL((void *)0)) { |
| 1888 | error = ENOBUFS55; |
| 1889 | break; |
| 1890 | } |
| 1891 | bcopy(eh, mtod(m, caddr_t)((caddr_t)((m)->m_hdr.mh_data)), sizeof(*eh)); |
| 1892 | error = bridge_ifenqueue(brifp, ifp, m); |
| 1893 | if (error) |
| 1894 | break; |
| 1895 | } |
| 1896 | if (error) |
| 1897 | ml_purge(&fml); |
| 1898 | else |
| 1899 | ipstat_inc(ips_fragmented); |
| 1900 | |
| 1901 | return; |
| 1902 | dropit: |
| 1903 | m_freem(m); |
| 1904 | } |
| 1905 | |
| 1906 | int |
| 1907 | bridge_ifenqueue(struct ifnet *brifp, struct ifnet *ifp, struct mbuf *m) |
| 1908 | { |
| 1909 | int error, len; |
| 1910 | |
| 1911 | /* Loop prevention. */ |
| 1912 | m->m_flagsm_hdr.mh_flags |= M_PROTO10x0010; |
| 1913 | |
| 1914 | len = m->m_pkthdrM_dat.MH.MH_pkthdr.len; |
| 1915 | |
| 1916 | error = if_enqueue(ifp, m); |
| 1917 | if (error) { |
| 1918 | brifp->if_oerrorsif_data.ifi_oerrors++; |
| 1919 | return (error); |
| 1920 | } |
| 1921 | |
| 1922 | brifp->if_opacketsif_data.ifi_opackets++; |
| 1923 | brifp->if_obytesif_data.ifi_obytes += len; |
| 1924 | |
| 1925 | return (0); |
| 1926 | } |
| 1927 | |
| 1928 | void |
| 1929 | bridge_ifinput(struct ifnet *ifp, struct mbuf *m) |
| 1930 | { |
| 1931 | struct mbuf_list ml = MBUF_LIST_INITIALIZER(){ ((void *)0), ((void *)0), 0 }; |
| 1932 | |
| 1933 | m->m_flagsm_hdr.mh_flags |= M_PROTO10x0010; |
| 1934 | |
| 1935 | ml_enqueue(&ml, m); |
| 1936 | if_input(ifp, &ml); |
| 1937 | } |
| 1938 | |
| 1939 | void |
| 1940 | bridge_send_icmp_err(struct ifnet *ifp, |
| 1941 | struct ether_header *eh, struct mbuf *n, int hassnap, struct llc *llc, |
| 1942 | int mtu, int type, int code) |
| 1943 | { |
| 1944 | struct ip *ip; |
| 1945 | struct icmp *icp; |
| 1946 | struct in_addr t; |
| 1947 | struct mbuf *m, *n2; |
| 1948 | int hlen; |
| 1949 | u_int8_t ether_tmp[ETHER_ADDR_LEN6]; |
| 1950 | |
| 1951 | n2 = m_copym(n, 0, M_COPYALL1000000000, M_DONTWAIT0x0002); |
| 1952 | if (!n2) { |
| 1953 | m_freem(n); |
| 1954 | return; |
| 1955 | } |
| 1956 | m = icmp_do_error(n, type, code, 0, mtu); |
| 1957 | if (m == NULL((void *)0)) { |
| 1958 | m_freem(n2); |
| 1959 | return; |
| 1960 | } |
| 1961 | |
| 1962 | n = n2; |
| 1963 | |
| 1964 | ip = mtod(m, struct ip *)((struct ip *)((m)->m_hdr.mh_data)); |
| 1965 | hlen = ip->ip_hl << 2; |
| 1966 | t = ip->ip_dst; |
| 1967 | ip->ip_dst = ip->ip_src; |
| 1968 | ip->ip_src = t; |
| 1969 | |
| 1970 | m->m_datam_hdr.mh_data += hlen; |
| 1971 | m->m_lenm_hdr.mh_len -= hlen; |
| 1972 | icp = mtod(m, struct icmp *)((struct icmp *)((m)->m_hdr.mh_data)); |
| 1973 | icp->icmp_cksum = 0; |
| 1974 | icp->icmp_cksum = in_cksum(m, ntohs(ip->ip_len)(__uint16_t)(__builtin_constant_p(ip->ip_len) ? (__uint16_t )(((__uint16_t)(ip->ip_len) & 0xffU) << 8 | ((__uint16_t )(ip->ip_len) & 0xff00U) >> 8) : __swap16md(ip-> ip_len)) - hlen); |
| 1975 | m->m_datam_hdr.mh_data -= hlen; |
| 1976 | m->m_lenm_hdr.mh_len += hlen; |
| 1977 | |
| 1978 | ip->ip_v = IPVERSION4; |
| 1979 | ip->ip_off &= htons(IP_DF)(__uint16_t)(__builtin_constant_p(0x4000) ? (__uint16_t)(((__uint16_t )(0x4000) & 0xffU) << 8 | ((__uint16_t)(0x4000) & 0xff00U) >> 8) : __swap16md(0x4000)); |
| 1980 | ip->ip_id = htons(ip_randomid())(__uint16_t)(__builtin_constant_p(ip_randomid()) ? (__uint16_t )(((__uint16_t)(ip_randomid()) & 0xffU) << 8 | ((__uint16_t )(ip_randomid()) & 0xff00U) >> 8) : __swap16md(ip_randomid ())); |
| 1981 | ip->ip_ttl = MAXTTL255; |
| 1982 | ip->ip_sum = 0; |
| 1983 | ip->ip_sum = in_cksum(m, hlen); |
| 1984 | |
| 1985 | /* Swap ethernet addresses */ |
| 1986 | bcopy(&eh->ether_dhost, ðer_tmp, sizeof(ether_tmp)); |
| 1987 | bcopy(&eh->ether_shost, &eh->ether_dhost, sizeof(ether_tmp)); |
| 1988 | bcopy(ðer_tmp, &eh->ether_shost, sizeof(ether_tmp)); |
| 1989 | |
| 1990 | /* Reattach SNAP header */ |
| 1991 | if (hassnap) { |
| 1992 | M_PREPEND(m, LLC_SNAPFRAMELEN, M_DONTWAIT)(m) = m_prepend((m), (8), (0x0002)); |
| 1993 | if (m == NULL((void *)0)) |
| 1994 | goto dropit; |
| 1995 | bcopy(llc, mtod(m, caddr_t)((caddr_t)((m)->m_hdr.mh_data)), LLC_SNAPFRAMELEN8); |
| 1996 | } |
| 1997 | |
| 1998 | /* Reattach ethernet header */ |
| 1999 | M_PREPEND(m, sizeof(*eh), M_DONTWAIT)(m) = m_prepend((m), (sizeof(*eh)), (0x0002)); |
| 2000 | if (m == NULL((void *)0)) |
| 2001 | goto dropit; |
| 2002 | bcopy(eh, mtod(m, caddr_t)((caddr_t)((m)->m_hdr.mh_data)), sizeof(*eh)); |
| 2003 | |
| 2004 | bridge_enqueue(ifp, m); |
| 2005 | m_freem(n); |
| 2006 | return; |
| 2007 | |
| 2008 | dropit: |
| 2009 | m_freem(n); |
| 2010 | } |
| 2011 | |
| 2012 | void |
| 2013 | bridge_take(void *unused) |
| 2014 | { |
| 2015 | return; |
| 2016 | } |
| 2017 | |
| 2018 | void |
| 2019 | bridge_rele(void *unused) |
| 2020 | { |
| 2021 | return; |
| 2022 | } |