--- /dev/null
+/* $NetBSD: if_bridge.c,v 1.31 2005/06/01 19:45:34 jdc Exp $ */
+/*
+ * Copyright (c) 2004-2010 Apple Inc. All rights reserved.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ *
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
+ */
+
+/*
+ * Copyright 2001 Wasabi Systems, Inc.
+ * All rights reserved.
+ *
+ * Written by Jason R. Thorpe for Wasabi Systems, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed for the NetBSD Project by
+ * Wasabi Systems, Inc.
+ * 4. The name of Wasabi Systems, Inc. may not be used to endorse
+ * or promote products derived from this software without specific prior
+ * written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * Copyright (c) 1999, 2000 Jason L. Wright (jason@thought.net)
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ * OpenBSD: if_bridge.c,v 1.60 2001/06/15 03:38:33 itojun Exp
+ */
+
+/*
+ * Network interface bridge support.
+ *
+ * TODO:
+ *
+ * - Currently only supports Ethernet-like interfaces (Ethernet,
+ * 802.11, VLANs on Ethernet, etc.) Figure out a nice way
+ * to bridge other types of interfaces (FDDI-FDDI, and maybe
+ * consider heterogenous bridges).
+ */
+
+#include <sys/cdefs.h>
+//__FBSDID("$FreeBSD$");
+
+//#include "opt_inet.h"
+//#include "opt_inet6.h"
+//#include "opt_carp.h"
+
+#define BRIDGE_DEBUG 1
+#ifndef BRIDGE_DEBUG
+#define BRIDGE_DEBUG 0
+#endif /* BRIDGE_DEBUG */
+
+#include <sys/param.h>
+#include <sys/mbuf.h>
+#include <sys/malloc.h>
+#include <sys/protosw.h>
+#include <sys/systm.h>
+#include <sys/time.h>
+#include <sys/socket.h> /* for net/if.h */
+#include <sys/sockio.h>
+//#include <sys/ctype.h> /* string functions */
+#include <sys/kernel.h>
+#include <sys/random.h>
+#include <sys/syslog.h>
+#include <sys/sysctl.h>
+//#include <vm/uma.h>
+//#include <sys/module.h>
+//#include <sys/priv.h>
+#include <sys/proc.h>
+#include <sys/lock.h>
+//#include <sys/mutex.h>
+#include <sys/mcache.h>
+
+#include <sys/kauth.h>
+
+#include <libkern/libkern.h>
+
+#include <kern/zalloc.h>
+
+#if NBPFILTER > 0
+#include <net/bpf.h>
+#endif
+#include <net/if.h>
+//#include <net/if_clone.h>
+#include <net/if_dl.h>
+#include <net/if_types.h>
+#include <net/if_var.h>
+//#include <net/pfil.h>
+
+#include <netinet/in.h> /* for struct arpcom */
+#include <netinet/in_systm.h>
+#include <netinet/in_var.h>
+#include <netinet/ip.h>
+#include <netinet/ip_var.h>
+#ifdef INET6
+#include <netinet/ip6.h>
+#include <netinet6/ip6_var.h>
+#endif
+#ifdef DEV_CARP
+#include <netinet/ip_carp.h>
+#endif
+//#include <machine/in_cksum.h>
+#include <netinet/if_ether.h> /* for struct arpcom */
+#include <net/bridgestp.h>
+#include <net/if_bridgevar.h>
+#include <net/if_llc.h>
+#include <net/if_vlan_var.h>
+
+#include <net/if_ether.h>
+#include <net/dlil.h>
+#include <net/kpi_interfacefilter.h>
+
+#include <net/route.h>
+#ifdef PFIL_HOOKS
+#include <netinet/ip_fw2.h>
+#include <netinet/ip_dummynet.h>
+#endif /* PFIL_HOOKS */
+
+#if BRIDGE_DEBUG
+
+#define BR_LCKDBG_MAX 4
+
+#define BRIDGE_LOCK(_sc) bridge_lock(_sc)
+#define BRIDGE_UNLOCK(_sc) bridge_unlock(_sc)
+#define BRIDGE_LOCK_ASSERT(_sc) lck_mtx_assert((_sc)->sc_mtx, LCK_MTX_ASSERT_OWNED)
+#define BRIDGE_LOCK2REF(_sc, _err) _err = bridge_lock2ref(_sc)
+#define BRIDGE_UNREF(_sc) bridge_unref(_sc)
+#define BRIDGE_XLOCK(_sc) bridge_xlock(_sc)
+#define BRIDGE_XDROP(_sc) bridge_xdrop(_sc)
+
+#else /* BRIDGE_DEBUG */
+
+#define BRIDGE_LOCK(_sc) lck_mtx_lock((_sc)->sc_mtx)
+#define BRIDGE_UNLOCK(_sc) lck_mtx_unlock((_sc)->sc_mtx)
+#define BRIDGE_LOCK_ASSERT(_sc) lck_mtx_assert((_sc)->sc_mtx, LCK_MTX_ASSERT_OWNED)
+#define BRIDGE_LOCK2REF(_sc, _err) do { \
+ lck_mtx_assert((_sc)->sc_mtx, LCK_MTX_ASSERT_OWNED); \
+ if ((_sc)->sc_iflist_xcnt > 0) \
+ (_err) = EBUSY; \
+ else \
+ (_sc)->sc_iflist_ref++; \
+ lck_mtx_unlock((_sc)->sc_mtx); \
+} while (0)
+#define BRIDGE_UNREF(_sc) do { \
+ lck_mtx_lock((_sc)->sc_mtx); \
+ (_sc)->sc_iflist_ref--; \
+ if (((_sc)->sc_iflist_xcnt > 0) && ((_sc)->sc_iflist_ref == 0)) { \
+ lck_mtx_unlock((_sc)->sc_mtx); \
+ wakeup(&(_sc)->sc_cv); \
+ } else \
+ lck_mtx_unlock((_sc)->sc_mtx); \
+} while (0)
+#define BRIDGE_XLOCK(_sc) do { \
+ lck_mtx_assert((_sc)->sc_mtx, LCK_MTX_ASSERT_OWNED); \
+ (_sc)->sc_iflist_xcnt++; \
+ while ((_sc)->sc_iflist_ref > 0) \
+ msleep(&(_sc)->sc_cv, (_sc)->sc_mtx, PZERO, "BRIDGE_XLOCK", NULL); \
+} while (0)
+#define BRIDGE_XDROP(_sc) do { \
+ lck_mtx_assert((_sc)->sc_mtx, LCK_MTX_ASSERT_OWNED); \
+ (_sc)->sc_iflist_xcnt--; \
+} while (0)
+
+#endif /* BRIDGE_DEBUG */
+
+#if NBPFILTER > 0
+#define BRIDGE_BPF_MTAP_INPUT(sc, m) \
+ if (sc->sc_bpf_input) \
+ bridge_bpf_input(sc->sc_ifp, m)
+#else /* NBPFILTER */
+#define BRIDGE_BPF_MTAP_INPUT(ifp, m)
+#endif /* NBPFILTER */
+
+/*
+ * Size of the route hash table. Must be a power of two.
+ */
+/* APPLE MODIFICATION - per Wasabi performance improvement, change the hash table size */
+#if 0
+#ifndef BRIDGE_RTHASH_SIZE
+#define BRIDGE_RTHASH_SIZE 1024
+#endif
+#else
+#ifndef BRIDGE_RTHASH_SIZE
+#define BRIDGE_RTHASH_SIZE 256
+#endif
+#endif
+
+/* APPLE MODIFICATION - support for HW checksums */
+#if APPLE_BRIDGE_HWCKSUM_SUPPORT
+#include <netinet/udp.h>
+#include <netinet/tcp.h>
+#endif
+
+#define BRIDGE_RTHASH_MASK (BRIDGE_RTHASH_SIZE - 1)
+
+/*
+ * Maximum number of addresses to cache.
+ */
+#ifndef BRIDGE_RTABLE_MAX
+#define BRIDGE_RTABLE_MAX 100
+#endif
+
+
+/*
+ * Timeout (in seconds) for entries learned dynamically.
+ */
+#ifndef BRIDGE_RTABLE_TIMEOUT
+#define BRIDGE_RTABLE_TIMEOUT (20 * 60) /* same as ARP */
+#endif
+
+/*
+ * Number of seconds between walks of the route list.
+ */
+#ifndef BRIDGE_RTABLE_PRUNE_PERIOD
+#define BRIDGE_RTABLE_PRUNE_PERIOD (5 * 60)
+#endif
+
+/*
+ * List of capabilities to possibly mask on the member interface.
+ */
+#define BRIDGE_IFCAPS_MASK (IFCAP_TOE|IFCAP_TSO|IFCAP_TXCSUM)
+/*
+ * List of capabilities to disable on the member interface.
+ */
+#define BRIDGE_IFCAPS_STRIP IFCAP_LRO
+
+/*
+ * Bridge interface list entry.
+ */
+struct bridge_iflist {
+ TAILQ_ENTRY(bridge_iflist) bif_next;
+ struct ifnet *bif_ifp; /* member if */
+ struct bstp_port bif_stp; /* STP state */
+ uint32_t bif_flags; /* member if flags */
+ int bif_savedcaps; /* saved capabilities */
+ uint32_t bif_addrmax; /* max # of addresses */
+ uint32_t bif_addrcnt; /* cur. # of addresses */
+ uint32_t bif_addrexceeded;/* # of address violations */
+
+ interface_filter_t bif_iff_ref;
+ struct bridge_softc *bif_sc;
+ char bif_promisc; /* promiscuous mode set */
+ char bif_proto_attached; /* protocol attached */
+ char bif_filter_attached; /* interface filter attached */
+};
+
+/*
+ * Bridge route node.
+ */
+struct bridge_rtnode {
+ LIST_ENTRY(bridge_rtnode) brt_hash; /* hash table linkage */
+ LIST_ENTRY(bridge_rtnode) brt_list; /* list linkage */
+ struct bridge_iflist *brt_dst; /* destination if */
+ unsigned long brt_expire; /* expiration time */
+ uint8_t brt_flags; /* address flags */
+ uint8_t brt_addr[ETHER_ADDR_LEN];
+ uint16_t brt_vlan; /* vlan id */
+
+};
+#define brt_ifp brt_dst->bif_ifp
+
+/*
+ * Software state for each bridge.
+ */
+struct bridge_softc {
+ struct ifnet *sc_ifp; /* make this an interface */
+ LIST_ENTRY(bridge_softc) sc_list;
+ lck_mtx_t *sc_mtx;
+ void *sc_cv;
+ uint32_t sc_brtmax; /* max # of addresses */
+ uint32_t sc_brtcnt; /* cur. # of addresses */
+ uint32_t sc_brttimeout; /* rt timeout in seconds */
+ uint32_t sc_iflist_ref; /* refcount for sc_iflist */
+ uint32_t sc_iflist_xcnt; /* refcount for sc_iflist */
+ TAILQ_HEAD(, bridge_iflist) sc_iflist; /* member interface list */
+ LIST_HEAD(, bridge_rtnode) *sc_rthash; /* our forwarding table */
+ LIST_HEAD(, bridge_rtnode) sc_rtlist; /* list version of above */
+ uint32_t sc_rthash_key; /* key for hash */
+ TAILQ_HEAD(, bridge_iflist) sc_spanlist; /* span ports list */
+ struct bstp_state sc_stp; /* STP state */
+ uint32_t sc_brtexceeded; /* # of cache drops */
+ uint32_t sc_filter_flags; /* ipf and flags */
+
+ char sc_if_xname[IFNAMSIZ];
+ bpf_packet_func sc_bpf_input;
+ bpf_packet_func sc_bpf_output;
+ u_int32_t sc_flags;
+
+#if BRIDGE_DEBUG
+ void *lock_lr[BR_LCKDBG_MAX]; /* locking calling history */
+ int next_lock_lr;
+ void *unlock_lr[BR_LCKDBG_MAX]; /* unlocking caller history */
+ int next_unlock_lr;
+#endif /* BRIDGE_DEBUG */
+};
+
+#define SCF_DETACHING 0x1
+
+static lck_mtx_t *bridge_list_mtx;
+//eventhandler_tag bridge_detach_cookie = NULL;
+
+int bridge_rtable_prune_period = BRIDGE_RTABLE_PRUNE_PERIOD;
+
+static zone_t bridge_rtnode_pool = NULL;
+
+static int bridge_clone_create(struct if_clone *, uint32_t, void *);
+static int bridge_clone_destroy(struct ifnet *);
+
+static errno_t bridge_ioctl(struct ifnet *, u_long, void *);
+#if HAS_IF_CAP
+static void bridge_mutecaps(struct bridge_softc *);
+static void bridge_set_ifcap(struct bridge_softc *, struct bridge_iflist *,
+ int);
+#endif
+__private_extern__ void bridge_ifdetach(struct bridge_iflist *, struct ifnet *);
+static int bridge_init(struct ifnet *);
+#if HAS_BRIDGE_DUMMYNET
+static void bridge_dummynet(struct mbuf *, struct ifnet *);
+#endif
+static void bridge_stop(struct ifnet *, int);
+static errno_t bridge_start(struct ifnet *, struct mbuf *);
+__private_extern__ errno_t bridge_input(struct ifnet *, struct mbuf *, void *);
+#if BRIDGE_MEMBER_OUT_FILTER
+static errno_t bridge_iff_output(void *, ifnet_t , protocol_family_t , mbuf_t *);
+static int bridge_output(struct ifnet *, struct mbuf *, struct sockaddr *,
+ struct rtentry *);
+#endif
+static void bridge_enqueue(struct bridge_softc *, struct ifnet *,
+ struct mbuf *);
+static void bridge_rtdelete(struct bridge_softc *, struct ifnet *ifp, int);
+
+static void bridge_forward(struct bridge_softc *, struct bridge_iflist *,
+ struct mbuf *m);
+
+static void bridge_timer(void *);
+
+static void bridge_broadcast(struct bridge_softc *, struct ifnet *,
+ struct mbuf *, int);
+static void bridge_span(struct bridge_softc *, struct mbuf *);
+
+static int bridge_rtupdate(struct bridge_softc *, const uint8_t *,
+ uint16_t, struct bridge_iflist *, int, uint8_t);
+static struct ifnet *bridge_rtlookup(struct bridge_softc *, const uint8_t *,
+ uint16_t);
+static void bridge_rttrim(struct bridge_softc *);
+static void bridge_rtage(struct bridge_softc *);
+static void bridge_rtflush(struct bridge_softc *, int);
+static int bridge_rtdaddr(struct bridge_softc *, const uint8_t *,
+ uint16_t);
+
+static int bridge_rtable_init(struct bridge_softc *);
+static void bridge_rtable_fini(struct bridge_softc *);
+
+static int bridge_rtnode_addr_cmp(const uint8_t *, const uint8_t *);
+static struct bridge_rtnode *bridge_rtnode_lookup(struct bridge_softc *,
+ const uint8_t *, uint16_t);
+static int bridge_rtnode_insert(struct bridge_softc *,
+ struct bridge_rtnode *);
+static void bridge_rtnode_destroy(struct bridge_softc *,
+ struct bridge_rtnode *);
+static void bridge_rtable_expire(struct ifnet *, int);
+static void bridge_state_change(struct ifnet *, int);
+
+static struct bridge_iflist *bridge_lookup_member(struct bridge_softc *,
+ const char *name);
+static struct bridge_iflist *bridge_lookup_member_if(struct bridge_softc *,
+ struct ifnet *ifp);
+static void bridge_delete_member(struct bridge_softc *,
+ struct bridge_iflist *, int);
+static void bridge_delete_span(struct bridge_softc *,
+ struct bridge_iflist *);
+
+static int bridge_ioctl_add(struct bridge_softc *, void *);
+static int bridge_ioctl_del(struct bridge_softc *, void *);
+static int bridge_ioctl_gifflags(struct bridge_softc *, void *);
+static int bridge_ioctl_sifflags(struct bridge_softc *, void *);
+static int bridge_ioctl_scache(struct bridge_softc *, void *);
+static int bridge_ioctl_gcache(struct bridge_softc *, void *);
+static int bridge_ioctl_gifs32(struct bridge_softc *, void *);
+static int bridge_ioctl_gifs64(struct bridge_softc *, void *);
+static int bridge_ioctl_rts32(struct bridge_softc *, void *);
+static int bridge_ioctl_rts64(struct bridge_softc *, void *);
+static int bridge_ioctl_saddr32(struct bridge_softc *, void *);
+static int bridge_ioctl_saddr64(struct bridge_softc *, void *);
+static int bridge_ioctl_sto(struct bridge_softc *, void *);
+static int bridge_ioctl_gto(struct bridge_softc *, void *);
+static int bridge_ioctl_daddr32(struct bridge_softc *, void *);
+static int bridge_ioctl_daddr64(struct bridge_softc *, void *);
+static int bridge_ioctl_flush(struct bridge_softc *, void *);
+static int bridge_ioctl_gpri(struct bridge_softc *, void *);
+static int bridge_ioctl_spri(struct bridge_softc *, void *);
+static int bridge_ioctl_ght(struct bridge_softc *, void *);
+static int bridge_ioctl_sht(struct bridge_softc *, void *);
+static int bridge_ioctl_gfd(struct bridge_softc *, void *);
+static int bridge_ioctl_sfd(struct bridge_softc *, void *);
+static int bridge_ioctl_gma(struct bridge_softc *, void *);
+static int bridge_ioctl_sma(struct bridge_softc *, void *);
+static int bridge_ioctl_sifprio(struct bridge_softc *, void *);
+static int bridge_ioctl_sifcost(struct bridge_softc *, void *);
+static int bridge_ioctl_sifmaxaddr(struct bridge_softc *, void *);
+static int bridge_ioctl_addspan(struct bridge_softc *, void *);
+static int bridge_ioctl_delspan(struct bridge_softc *, void *);
+static int bridge_ioctl_gbparam32(struct bridge_softc *, void *);
+static int bridge_ioctl_gbparam64(struct bridge_softc *, void *);
+static int bridge_ioctl_grte(struct bridge_softc *, void *);
+static int bridge_ioctl_gifsstp32(struct bridge_softc *, void *);
+static int bridge_ioctl_gifsstp64(struct bridge_softc *, void *);
+static int bridge_ioctl_sproto(struct bridge_softc *, void *);
+static int bridge_ioctl_stxhc(struct bridge_softc *, void *);
+static int bridge_ioctl_purge(struct bridge_softc *sc, void *arg);
+static int bridge_ioctl_gfilt(struct bridge_softc *, void *);
+static int bridge_ioctl_sfilt(struct bridge_softc *, void *);
+#ifdef PFIL_HOOKS
+static int bridge_pfil(struct mbuf **, struct ifnet *, struct ifnet *,
+ int);
+static int bridge_ip_checkbasic(struct mbuf **mp);
+#ifdef INET6
+static int bridge_ip6_checkbasic(struct mbuf **mp);
+#endif /* INET6 */
+static int bridge_fragment(struct ifnet *, struct mbuf *,
+ struct ether_header *, int, struct llc *);
+#endif /* PFIL_HOOKS */
+
+static errno_t bridge_set_bpf_tap(ifnet_t ifn, bpf_tap_mode mode, bpf_packet_func bpf_callback);
+__private_extern__ errno_t bridge_bpf_input(ifnet_t ifp, struct mbuf *m);
+__private_extern__ errno_t bridge_bpf_output(ifnet_t ifp, struct mbuf *m);
+
+static void bridge_detach(ifnet_t ifp);
+
+#define m_copypacket(m, how) m_copym(m, 0, M_COPYALL, how)
+
+/* The default bridge vlan is 1 (IEEE 802.1Q-2003 Table 9-2) */
+#define VLANTAGOF(_m) 0
+
+static struct bstp_cb_ops bridge_ops = {
+ .bcb_state = bridge_state_change,
+ .bcb_rtage = bridge_rtable_expire
+};
+
+SYSCTL_DECL(_net_link);
+SYSCTL_NODE(_net_link, IFT_BRIDGE, bridge, CTLFLAG_RW, 0, "Bridge");
+
+#if defined(PFIL_HOOKS)
+static int pfil_onlyip = 1; /* only pass IP[46] packets when pfil is enabled */
+static int pfil_bridge = 1; /* run pfil hooks on the bridge interface */
+static int pfil_member = 1; /* run pfil hooks on the member interface */
+static int pfil_ipfw = 0; /* layer2 filter with ipfw */
+static int pfil_ipfw_arp = 0; /* layer2 filter with ipfw */
+static int pfil_local_phys = 0; /* run pfil hooks on the physical interface for
+ locally destined packets */
+SYSCTL_INT(_net_link_bridge, OID_AUTO, pfil_onlyip, CTLFLAG_RW,
+ &pfil_onlyip, 0, "Only pass IP packets when pfil is enabled");
+SYSCTL_INT(_net_link_bridge, OID_AUTO, ipfw_arp, CTLFLAG_RW,
+ &pfil_ipfw_arp, 0, "Filter ARP packets through IPFW layer2");
+SYSCTL_INT(_net_link_bridge, OID_AUTO, pfil_bridge, CTLFLAG_RW,
+ &pfil_bridge, 0, "Packet filter on the bridge interface");
+SYSCTL_INT(_net_link_bridge, OID_AUTO, pfil_member, CTLFLAG_RW,
+ &pfil_member, 0, "Packet filter on the member interface");
+SYSCTL_INT(_net_link_bridge, OID_AUTO, pfil_local_phys, CTLFLAG_RW,
+ &pfil_local_phys, 0,
+ "Packet filter on the physical interface for locally destined packets");
+#endif /* PFIL_HOOKS */
+
+static int log_stp = 0; /* log STP state changes */
+SYSCTL_INT(_net_link_bridge, OID_AUTO, log_stp, CTLFLAG_RW,
+ &log_stp, 0, "Log STP state changes");
+
+struct bridge_control {
+ int (*bc_func)(struct bridge_softc *, void *);
+ unsigned int bc_argsize;
+ unsigned int bc_flags;
+};
+
+#define BC_F_COPYIN 0x01 /* copy arguments in */
+#define BC_F_COPYOUT 0x02 /* copy arguments out */
+#define BC_F_SUSER 0x04 /* do super-user check */
+
+static const struct bridge_control bridge_control_table32[] = {
+ { bridge_ioctl_add, sizeof(struct ifbreq),
+ BC_F_COPYIN|BC_F_SUSER },
+ { bridge_ioctl_del, sizeof(struct ifbreq),
+ BC_F_COPYIN|BC_F_SUSER },
+
+ { bridge_ioctl_gifflags, sizeof(struct ifbreq),
+ BC_F_COPYIN|BC_F_COPYOUT },
+ { bridge_ioctl_sifflags, sizeof(struct ifbreq),
+ BC_F_COPYIN|BC_F_SUSER },
+
+ { bridge_ioctl_scache, sizeof(struct ifbrparam),
+ BC_F_COPYIN|BC_F_SUSER },
+ { bridge_ioctl_gcache, sizeof(struct ifbrparam),
+ BC_F_COPYOUT },
+
+ { bridge_ioctl_gifs32, sizeof(struct ifbifconf32),
+ BC_F_COPYIN|BC_F_COPYOUT },
+ { bridge_ioctl_rts32, sizeof(struct ifbaconf32),
+ BC_F_COPYIN|BC_F_COPYOUT },
+
+ { bridge_ioctl_saddr32, sizeof(struct ifbareq32),
+ BC_F_COPYIN|BC_F_SUSER },
+
+ { bridge_ioctl_sto, sizeof(struct ifbrparam),
+ BC_F_COPYIN|BC_F_SUSER },
+ { bridge_ioctl_gto, sizeof(struct ifbrparam),
+ BC_F_COPYOUT },
+
+ { bridge_ioctl_daddr32, sizeof(struct ifbareq32),
+ BC_F_COPYIN|BC_F_SUSER },
+
+ { bridge_ioctl_flush, sizeof(struct ifbreq),
+ BC_F_COPYIN|BC_F_SUSER },
+
+ { bridge_ioctl_gpri, sizeof(struct ifbrparam),
+ BC_F_COPYOUT },
+ { bridge_ioctl_spri, sizeof(struct ifbrparam),
+ BC_F_COPYIN|BC_F_SUSER },
+
+ { bridge_ioctl_ght, sizeof(struct ifbrparam),
+ BC_F_COPYOUT },
+ { bridge_ioctl_sht, sizeof(struct ifbrparam),
+ BC_F_COPYIN|BC_F_SUSER },
+
+ { bridge_ioctl_gfd, sizeof(struct ifbrparam),
+ BC_F_COPYOUT },
+ { bridge_ioctl_sfd, sizeof(struct ifbrparam),
+ BC_F_COPYIN|BC_F_SUSER },
+
+ { bridge_ioctl_gma, sizeof(struct ifbrparam),
+ BC_F_COPYOUT },
+ { bridge_ioctl_sma, sizeof(struct ifbrparam),
+ BC_F_COPYIN|BC_F_SUSER },
+
+ { bridge_ioctl_sifprio, sizeof(struct ifbreq),
+ BC_F_COPYIN|BC_F_SUSER },
+
+ { bridge_ioctl_sifcost, sizeof(struct ifbreq),
+ BC_F_COPYIN|BC_F_SUSER },
+
+ { bridge_ioctl_gfilt, sizeof(struct ifbrparam),
+ BC_F_COPYOUT },
+ { bridge_ioctl_sfilt, sizeof(struct ifbrparam),
+ BC_F_COPYIN|BC_F_SUSER },
+
+ { bridge_ioctl_purge, sizeof(struct ifbreq),
+ BC_F_COPYIN|BC_F_SUSER },
+
+ { bridge_ioctl_addspan, sizeof(struct ifbreq),
+ BC_F_COPYIN|BC_F_SUSER },
+ { bridge_ioctl_delspan, sizeof(struct ifbreq),
+ BC_F_COPYIN|BC_F_SUSER },
+
+ { bridge_ioctl_gbparam32, sizeof(struct ifbropreq32),
+ BC_F_COPYOUT },
+
+ { bridge_ioctl_grte, sizeof(struct ifbrparam),
+ BC_F_COPYOUT },
+
+ { bridge_ioctl_gifsstp32, sizeof(struct ifbpstpconf32),
+ BC_F_COPYIN|BC_F_COPYOUT },
+
+ { bridge_ioctl_sproto, sizeof(struct ifbrparam),
+ BC_F_COPYIN|BC_F_SUSER },
+
+ { bridge_ioctl_stxhc, sizeof(struct ifbrparam),
+ BC_F_COPYIN|BC_F_SUSER },
+
+ { bridge_ioctl_sifmaxaddr, sizeof(struct ifbreq),
+ BC_F_COPYIN|BC_F_SUSER },
+};
+
+static const struct bridge_control bridge_control_table64[] = {
+ { bridge_ioctl_add, sizeof(struct ifbreq),
+ BC_F_COPYIN|BC_F_SUSER },
+ { bridge_ioctl_del, sizeof(struct ifbreq),
+ BC_F_COPYIN|BC_F_SUSER },
+
+ { bridge_ioctl_gifflags, sizeof(struct ifbreq),
+ BC_F_COPYIN|BC_F_COPYOUT },
+ { bridge_ioctl_sifflags, sizeof(struct ifbreq),
+ BC_F_COPYIN|BC_F_SUSER },
+
+ { bridge_ioctl_scache, sizeof(struct ifbrparam),
+ BC_F_COPYIN|BC_F_SUSER },
+ { bridge_ioctl_gcache, sizeof(struct ifbrparam),
+ BC_F_COPYOUT },
+
+ { bridge_ioctl_gifs64, sizeof(struct ifbifconf64),
+ BC_F_COPYIN|BC_F_COPYOUT },
+ { bridge_ioctl_rts64, sizeof(struct ifbaconf64),
+ BC_F_COPYIN|BC_F_COPYOUT },
+
+ { bridge_ioctl_saddr64, sizeof(struct ifbareq64),
+ BC_F_COPYIN|BC_F_SUSER },
+
+ { bridge_ioctl_sto, sizeof(struct ifbrparam),
+ BC_F_COPYIN|BC_F_SUSER },
+ { bridge_ioctl_gto, sizeof(struct ifbrparam),
+ BC_F_COPYOUT },
+
+ { bridge_ioctl_daddr64, sizeof(struct ifbareq64),
+ BC_F_COPYIN|BC_F_SUSER },
+
+ { bridge_ioctl_flush, sizeof(struct ifbreq),
+ BC_F_COPYIN|BC_F_SUSER },
+
+ { bridge_ioctl_gpri, sizeof(struct ifbrparam),
+ BC_F_COPYOUT },
+ { bridge_ioctl_spri, sizeof(struct ifbrparam),
+ BC_F_COPYIN|BC_F_SUSER },
+
+ { bridge_ioctl_ght, sizeof(struct ifbrparam),
+ BC_F_COPYOUT },
+ { bridge_ioctl_sht, sizeof(struct ifbrparam),
+ BC_F_COPYIN|BC_F_SUSER },
+
+ { bridge_ioctl_gfd, sizeof(struct ifbrparam),
+ BC_F_COPYOUT },
+ { bridge_ioctl_sfd, sizeof(struct ifbrparam),
+ BC_F_COPYIN|BC_F_SUSER },
+
+ { bridge_ioctl_gma, sizeof(struct ifbrparam),
+ BC_F_COPYOUT },
+ { bridge_ioctl_sma, sizeof(struct ifbrparam),
+ BC_F_COPYIN|BC_F_SUSER },
+
+ { bridge_ioctl_sifprio, sizeof(struct ifbreq),
+ BC_F_COPYIN|BC_F_SUSER },
+
+ { bridge_ioctl_sifcost, sizeof(struct ifbreq),
+ BC_F_COPYIN|BC_F_SUSER },
+
+ { bridge_ioctl_gfilt, sizeof(struct ifbrparam),
+ BC_F_COPYOUT },
+ { bridge_ioctl_sfilt, sizeof(struct ifbrparam),
+ BC_F_COPYIN|BC_F_SUSER },
+
+ { bridge_ioctl_purge, sizeof(struct ifbreq),
+ BC_F_COPYIN|BC_F_SUSER },
+
+ { bridge_ioctl_addspan, sizeof(struct ifbreq),
+ BC_F_COPYIN|BC_F_SUSER },
+ { bridge_ioctl_delspan, sizeof(struct ifbreq),
+ BC_F_COPYIN|BC_F_SUSER },
+
+ { bridge_ioctl_gbparam64, sizeof(struct ifbropreq64),
+ BC_F_COPYOUT },
+
+ { bridge_ioctl_grte, sizeof(struct ifbrparam),
+ BC_F_COPYOUT },
+
+ { bridge_ioctl_gifsstp64, sizeof(struct ifbpstpconf64),
+ BC_F_COPYIN|BC_F_COPYOUT },
+
+ { bridge_ioctl_sproto, sizeof(struct ifbrparam),
+ BC_F_COPYIN|BC_F_SUSER },
+
+ { bridge_ioctl_stxhc, sizeof(struct ifbrparam),
+ BC_F_COPYIN|BC_F_SUSER },
+
+ { bridge_ioctl_sifmaxaddr, sizeof(struct ifbreq),
+ BC_F_COPYIN|BC_F_SUSER },
+};
+
+static const unsigned int bridge_control_table_size =
+sizeof(bridge_control_table32) / sizeof(bridge_control_table32[0]);
+
+static LIST_HEAD(, bridge_softc) bridge_list = LIST_HEAD_INITIALIZER(bridge_list);
+
+static lck_grp_t *bridge_lock_grp = NULL;
+static lck_attr_t *bridge_lock_attr = NULL;
+
+static if_clone_t bridge_cloner = NULL;
+
+__private_extern__ int _if_brige_debug = 0;
+
+SYSCTL_INT(_net_link_bridge, OID_AUTO, debug, CTLFLAG_RW,
+ &_if_brige_debug, 0, "Bridge debug");
+
+#if BRIDGE_DEBUG
+
+static void printf_ether_header(struct ether_header *eh);
+static void printf_mbuf_data(mbuf_t m, size_t offset, size_t len);
+static void printf_mbuf_pkthdr(mbuf_t m, const char *prefix, const char *suffix);
+static void printf_mbuf(mbuf_t m, const char *prefix, const char *suffix);
+static void link_print(struct sockaddr_dl * dl_p);
+
+static void bridge_lock(struct bridge_softc *);
+static void bridge_unlock(struct bridge_softc *);
+static int bridge_lock2ref(struct bridge_softc *);
+static void bridge_unref(struct bridge_softc *);
+static void bridge_xlock(struct bridge_softc *);
+static void bridge_xdrop(struct bridge_softc *);
+
+static void bridge_lock(struct bridge_softc *sc)
+{
+ void *lr_saved = __builtin_return_address(0);
+
+ lck_mtx_assert(sc->sc_mtx, LCK_MTX_ASSERT_NOTOWNED);
+
+ lck_mtx_lock(sc->sc_mtx);
+
+ sc->lock_lr[sc->next_lock_lr] = lr_saved;
+ sc->next_lock_lr = (sc->next_lock_lr+1) % SO_LCKDBG_MAX;
+}
+
+static void bridge_unlock(struct bridge_softc *sc)
+{
+ void *lr_saved = __builtin_return_address(0);
+
+ lck_mtx_assert(sc->sc_mtx, LCK_MTX_ASSERT_OWNED);
+
+ sc->unlock_lr[sc->next_unlock_lr] = lr_saved;
+ sc->next_unlock_lr = (sc->next_unlock_lr+1) % SO_LCKDBG_MAX;
+
+ lck_mtx_unlock(sc->sc_mtx);
+}
+
+static int bridge_lock2ref(struct bridge_softc *sc)
+{
+ int error = 0;
+ void *lr_saved = __builtin_return_address(0);
+
+ lck_mtx_assert(sc->sc_mtx, LCK_MTX_ASSERT_OWNED);
+
+ if (sc->sc_iflist_xcnt > 0)
+ error = EBUSY;
+ else
+ sc->sc_iflist_ref++;
+
+ sc->unlock_lr[sc->next_unlock_lr] = lr_saved;
+ sc->next_unlock_lr = (sc->next_unlock_lr+1) % SO_LCKDBG_MAX;
+ lck_mtx_unlock(sc->sc_mtx);
+
+ return error;
+}
+
+static void bridge_unref(struct bridge_softc *sc)
+{
+ void *lr_saved = __builtin_return_address(0);
+
+ lck_mtx_assert(sc->sc_mtx, LCK_MTX_ASSERT_NOTOWNED);
+
+ lck_mtx_lock(sc->sc_mtx);
+ sc->lock_lr[sc->next_lock_lr] = lr_saved;
+ sc->next_lock_lr = (sc->next_lock_lr+1) % SO_LCKDBG_MAX;
+
+ sc->sc_iflist_ref--;
+
+ sc->unlock_lr[sc->next_unlock_lr] = lr_saved;
+ sc->next_unlock_lr = (sc->next_unlock_lr+1) % SO_LCKDBG_MAX;
+ if ((sc->sc_iflist_xcnt > 0) && (sc->sc_iflist_ref == 0)) {
+ lck_mtx_unlock(sc->sc_mtx);
+ wakeup(&sc->sc_cv);
+ } else
+ lck_mtx_unlock(sc->sc_mtx);
+}
+
+static void bridge_xlock(struct bridge_softc *sc)
+{
+ void *lr_saved = __builtin_return_address(0);
+
+ lck_mtx_assert(sc->sc_mtx, LCK_MTX_ASSERT_OWNED);
+
+ sc->sc_iflist_xcnt++;
+ while (sc->sc_iflist_ref > 0) {
+ sc->unlock_lr[sc->next_unlock_lr] = lr_saved;
+ sc->next_unlock_lr = (sc->next_unlock_lr+1) % SO_LCKDBG_MAX;
+
+ msleep(&sc->sc_cv, sc->sc_mtx, PZERO, "BRIDGE_XLOCK", NULL);
+
+ sc->lock_lr[sc->next_lock_lr] = lr_saved;
+ sc->next_lock_lr = (sc->next_lock_lr+1) % SO_LCKDBG_MAX;
+ }
+}
+
+static void bridge_xdrop(struct bridge_softc *sc)
+{
+ lck_mtx_assert(sc->sc_mtx, LCK_MTX_ASSERT_OWNED);
+
+ sc->sc_iflist_xcnt--;
+}
+
+void
+printf_mbuf_pkthdr(mbuf_t m, const char *prefix, const char *suffix)
+{
+ if (m)
+ printf("%spktlen: %u rcvif: %p header: %p nextpkt: %p%s",
+ prefix ? prefix : "",
+ (unsigned int)mbuf_pkthdr_len(m), mbuf_pkthdr_rcvif(m), mbuf_pkthdr_header(m), mbuf_nextpkt(m),
+ suffix ? suffix : "");
+ else
+ printf("%s<NULL>%s\n", prefix, suffix);
+}
+
+void
+printf_mbuf(mbuf_t m, const char *prefix, const char *suffix)
+{
+ if (m) {
+ printf("%s%p type: %u flags: 0x%x len: %u data: %p maxlen: %u datastart: %p next: %p%s",
+ prefix ? prefix : "",
+ m, mbuf_type(m), mbuf_flags(m), (unsigned int)mbuf_len(m), mbuf_data(m),
+ (unsigned int)mbuf_maxlen(m), mbuf_datastart(m), mbuf_next(m),
+ !suffix || (mbuf_flags(m) & MBUF_PKTHDR) ? "" : suffix);
+ if ((mbuf_flags(m) & MBUF_PKTHDR))
+ printf_mbuf_pkthdr(m, " ", suffix);
+ } else
+ printf("%s<NULL>%s\n", prefix, suffix);
+}
+
+void
+printf_mbuf_data(mbuf_t m, size_t offset, size_t len)
+{
+ mbuf_t n;
+ size_t i, j;
+ size_t pktlen, mlen, maxlen;
+ unsigned char *ptr;
+
+ pktlen = mbuf_pkthdr_len(m);
+
+ if (offset > pktlen)
+ return;
+
+ maxlen = (pktlen - offset > len) ? len : pktlen;
+ n = m;
+ mlen = mbuf_len(n);
+ ptr = mbuf_data(n);
+ for (i = 0, j = 0; i < maxlen; i++, j++) {
+ if (j >= mlen) {
+ n = mbuf_next(n);
+ if (n == 0)
+ break;
+ ptr = mbuf_data(n);
+ mlen = mbuf_len(n);
+ j = 0;
+ }
+ if (i >= offset) {
+ printf("%02x%s", ptr[j], i % 2 ? " " : "");
+ }
+ }
+ return;
+}
+
+static void
+printf_ether_header(struct ether_header *eh)
+{
+ printf("%02x:%02x:%02x:%02x:%02x:%02x > %02x:%02x:%02x:%02x:%02x:%02x 0x%04x ",
+ eh->ether_shost[0], eh->ether_shost[1], eh->ether_shost[2],
+ eh->ether_shost[3], eh->ether_shost[4], eh->ether_shost[5],
+ eh->ether_dhost[0], eh->ether_dhost[1], eh->ether_dhost[2],
+ eh->ether_dhost[3], eh->ether_dhost[4], eh->ether_dhost[5],
+ eh->ether_type);
+}
+
+static void
+link_print(struct sockaddr_dl * dl_p)
+{
+ int i;
+
+#if 1
+ printf("sdl len %d index %d family %d type 0x%x nlen %d alen %d"
+ " slen %d addr ", dl_p->sdl_len,
+ dl_p->sdl_index, dl_p->sdl_family, dl_p->sdl_type,
+ dl_p->sdl_nlen, dl_p->sdl_alen, dl_p->sdl_slen);
+#endif
+ for (i = 0; i < dl_p->sdl_alen; i++)
+ printf("%s%x", i ? ":" : "",
+ (CONST_LLADDR(dl_p))[i]);
+ printf("\n");
+ return;
+}
+
+#endif /* BRIDGE_DEBUG */
+
+/*
+ * bridgeattach:
+ *
+ * Pseudo-device attach routine.
+ */
+__private_extern__ int
+bridgeattach(__unused int n)
+{
+ int error;
+ lck_grp_attr_t *lck_grp_attr = NULL;
+ struct ifnet_clone_params ifnet_clone_params;
+
+ bridge_rtnode_pool = zinit(sizeof(struct bridge_rtnode), 1024 * sizeof(struct bridge_rtnode),
+ 0, "bridge_rtnode");
+ zone_change(bridge_rtnode_pool, Z_CALLERACCT, FALSE);
+
+ lck_grp_attr = lck_grp_attr_alloc_init();
+
+ bridge_lock_grp = lck_grp_alloc_init("if_bridge", lck_grp_attr);
+
+ bridge_lock_attr = lck_attr_alloc_init();
+
+#if BRIDGE_DEBUG
+ lck_attr_setdebug(bridge_lock_attr);
+#endif
+
+ bridge_list_mtx = lck_mtx_alloc_init(bridge_lock_grp, bridge_lock_attr);
+
+ // can free the attributes once we've allocated the group lock
+ lck_grp_attr_free(lck_grp_attr);
+
+ LIST_INIT(&bridge_list);
+
+ bstp_sys_init();
+
+ ifnet_clone_params.ifc_name = "bridge";
+ ifnet_clone_params.ifc_create = bridge_clone_create;
+ ifnet_clone_params.ifc_destroy = bridge_clone_destroy;
+
+ error = ifnet_clone_attach(&ifnet_clone_params, &bridge_cloner);
+ if (error != 0)
+ printf("bridgeattach: ifnet_clone_attach failed %d\n", error);
+
+ return error;
+}
+
+#if defined(PFIL_HOOKS)
+/*
+ * handler for net.link.bridge.pfil_ipfw
+ */
+static int
+sysctl_pfil_ipfw SYSCTL_HANDLER_ARGS
+{
+#pragma unused(arg1,arg2)
+ int enable = pfil_ipfw;
+ int error;
+
+ error = sysctl_handle_int(oidp, &enable, 0, req);
+ enable = (enable) ? 1 : 0;
+
+ if (enable != pfil_ipfw) {
+ pfil_ipfw = enable;
+
+ /*
+ * Disable pfil so that ipfw doesnt run twice, if the user
+ * really wants both then they can re-enable pfil_bridge and/or
+ * pfil_member. Also allow non-ip packets as ipfw can filter by
+ * layer2 type.
+ */
+ if (pfil_ipfw) {
+ pfil_onlyip = 0;
+ pfil_bridge = 0;
+ pfil_member = 0;
+ }
+ }
+
+ return (error);
+}
+SYSCTL_PROC(_net_link_bridge, OID_AUTO, ipfw, CTLTYPE_INT|CTLFLAG_RW,
+ &pfil_ipfw, 0, &sysctl_pfil_ipfw, "I", "Layer2 filter with IPFW");
+#endif /* PFIL_HOOKS */
+
+/*
+ * bridge_clone_create:
+ *
+ * Create a new bridge instance.
+ */
+static int
+bridge_clone_create(struct if_clone *ifc, uint32_t unit, __unused void *params)
+{
+ struct ifnet *ifp = NULL;
+ struct bridge_softc *sc;
+ u_char eaddr[6];
+ struct ifnet_init_params init_params;
+ errno_t error = 0;
+ uint32_t sdl_buffer[offsetof(struct sockaddr_dl, sdl_data) + IFNAMSIZ + ETHER_ADDR_LEN];
+ struct sockaddr_dl *sdl = (struct sockaddr_dl *)sdl_buffer;
+
+ sc = _MALLOC(sizeof(*sc), M_DEVBUF, M_WAITOK);
+ memset(sc, 0, sizeof(*sc));
+
+ sc->sc_mtx = lck_mtx_alloc_init(bridge_lock_grp, bridge_lock_attr);
+ sc->sc_brtmax = BRIDGE_RTABLE_MAX;
+ sc->sc_brttimeout = BRIDGE_RTABLE_TIMEOUT;
+ sc->sc_filter_flags = IFBF_FILT_DEFAULT;
+#ifndef BRIDGE_IPF
+ /*
+ * For backwards compatibility with previous behaviour...
+ * Switch off filtering on the bridge itself if BRIDGE_IPF is
+ * not defined.
+ */
+ sc->sc_filter_flags &= ~IFBF_FILT_USEIPF;
+#endif
+
+ /* Initialize our routing table. */
+ error = bridge_rtable_init(sc);
+ if (error != 0) {
+ printf("bridge_clone_create: bridge_rtable_init failed %d\n", error);
+ goto done;
+ }
+
+ TAILQ_INIT(&sc->sc_iflist);
+ TAILQ_INIT(&sc->sc_spanlist);
+
+ /* use the interface name as the unique id for ifp recycle */
+ snprintf(sc->sc_if_xname, sizeof(sc->sc_if_xname), "%s%d",
+ ifc->ifc_name, unit);
+ memset(&init_params, 0, sizeof(struct ifnet_init_params));
+ init_params.uniqueid = sc->sc_if_xname;
+ init_params.uniqueid_len = strlen(sc->sc_if_xname);
+ init_params.name = ifc->ifc_name;
+ init_params.unit = unit;
+ init_params.family = IFNET_FAMILY_ETHERNET;
+ init_params.type = IFT_BRIDGE;
+ init_params.output = bridge_start;
+ init_params.demux = ether_demux;
+ init_params.add_proto = ether_add_proto;
+ init_params.del_proto = ether_del_proto;
+ init_params.check_multi = ether_check_multi;
+ init_params.framer = ether_frameout;
+ init_params.softc = sc;
+ init_params.ioctl = bridge_ioctl;
+ init_params.set_bpf_tap = bridge_set_bpf_tap;
+ init_params.detach = bridge_detach;
+ init_params.broadcast_addr = etherbroadcastaddr;
+ init_params.broadcast_len = ETHER_ADDR_LEN;
+ error = ifnet_allocate(&init_params, &ifp);
+ if (error != 0) {
+ printf("bridge_clone_create: ifnet_allocate failed %d\n", error);
+ goto done;
+ }
+ sc->sc_ifp = ifp;
+
+ error = ifnet_set_mtu(ifp, ETHERMTU);
+ if (error != 0) {
+ printf("bridge_clone_create: ifnet_set_mtu failed %d\n", error);
+ goto done;
+ }
+ error = ifnet_set_addrlen(ifp, ETHER_ADDR_LEN);
+ if (error != 0) {
+ printf("bridge_clone_create: ifnet_set_addrlen failed %d\n", error);
+ goto done;
+ }
+ error = ifnet_set_baudrate(ifp, 10000000) ; // XXX: this is what IONetworking does
+ if (error != 0) {
+ printf("bridge_clone_create: ifnet_set_baudrate failed %d\n", error);
+ goto done;
+ }
+ error = ifnet_set_hdrlen(ifp, ETHER_HDR_LEN);
+ if (error != 0) {
+ printf("bridge_clone_create: ifnet_set_hdrlen failed %d\n", error);
+ goto done;
+ }
+ error = ifnet_set_flags(ifp, IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS | IFF_MULTICAST,
+ 0xffff);
+ if (error != 0) {
+ printf("bridge_clone_create: ifnet_set_flags failed %d\n", error);
+ goto done;
+ }
+
+#if 0
+ /*
+ * Generate a random ethernet address with a locally administered
+ * address.
+ *
+ * Since we are using random ethernet addresses for the bridge, it is
+ * possible that we might have address collisions, so make sure that
+ * this hardware address isn't already in use on another bridge.
+ */
+ {
+ int retry;
+
+ for (retry = 1; retry != 0;) {
+ struct ifnet *bifp;
+ struct bridge_softc *sc2;
+
+ read_random(eaddr, ETHER_ADDR_LEN);
+ eaddr[0] &= ~1; /* clear multicast bit */
+ eaddr[0] |= 2; /* set the LAA bit */
+ retry = 0;
+ lck_mtx_lock(bridge_list_mtx);
+ LIST_FOREACH(sc2, &bridge_list, sc_list) {
+ bifp = sc2->sc_ifp;
+ if (memcmp(eaddr, ifnet_lladdr(bifp), ETHER_ADDR_LEN) == 0)
+ retry = 1;
+ }
+ lck_mtx_unlock(bridge_list_mtx);
+ }
+ }
+#else
+ /*
+ * Generate a random ethernet address and use the private AC:DE:48
+ * OUI code.
+ */
+ {
+ uint32_t r;
+
+ read_random(&r, sizeof(r));
+ eaddr[0] = 0xAC;
+ eaddr[1] = 0xDE;
+ eaddr[2] = 0x48;
+ eaddr[3] = (r >> 0) & 0xffu;
+ eaddr[4] = (r >> 8) & 0xffu;
+ eaddr[5] = (r >> 16) & 0xffu;
+ }
+#endif
+
+ memset(sdl, 0, sizeof(sdl_buffer));
+ sdl->sdl_family = AF_LINK;
+ sdl->sdl_nlen = strlen(sc->sc_if_xname);
+ sdl->sdl_alen = ETHER_ADDR_LEN;
+ sdl->sdl_len = offsetof(struct sockaddr_dl, sdl_data);
+ memcpy(sdl->sdl_data, sc->sc_if_xname, sdl->sdl_nlen);
+ memcpy(LLADDR(sdl), eaddr, ETHER_ADDR_LEN);
+
+#if BRIDGE_DEBUG
+ link_print(sdl);
+#endif
+
+ error = ifnet_attach(ifp, NULL);
+ if (error != 0) {
+ printf("bridge_clone_create: ifnet_attach failed %d\n", error);
+ goto done;
+ }
+
+ error = ifnet_set_lladdr_and_type(ifp, eaddr, ETHER_ADDR_LEN, IFT_ETHER);
+ if (error != 0) {
+ printf("bridge_clone_create: ifnet_set_lladdr_and_type failed %d\n", error);
+ goto done;
+ }
+
+#if APPLE_BRIDGE_HWCKSUM_SUPPORT
+ /*
+ * APPLE MODIFICATION - our bridge can support HW checksums
+ * (useful if underlying interfaces support them) on TX,
+ * RX is not that interesting, since the stack just looks to
+ * see if the packet has been checksummed already (I think)
+ * but we might as well indicate we support it
+ */
+ ifp->if_capabilities =
+ IFCAP_CSUM_IPv4_Tx | IFCAP_CSUM_TCPv4_Tx | IFCAP_CSUM_UDPv4_Tx |
+ IFCAP_CSUM_IPv4_Rx | IFCAP_CSUM_TCPv4_Rx | IFCAP_CSUM_UDPv4_Rx ;
+#endif
+
+ bstp_attach(&sc->sc_stp, &bridge_ops);
+
+ lck_mtx_lock(bridge_list_mtx);
+ LIST_INSERT_HEAD(&bridge_list, sc, sc_list);
+ lck_mtx_unlock(bridge_list_mtx);
+
+ /* attach as ethernet */
+ error = bpf_attach(ifp, DLT_EN10MB, sizeof(struct ether_header), NULL, NULL);
+
+done:
+ if (error != 0) {
+ printf("bridge_clone_create failed error %d\n", error);
+ /* Cleanup TBD */
+ }
+
+ return error;
+}
+
+/*
+ * bridge_clone_destroy:
+ *
+ * Destroy a bridge instance.
+ */
+static int
+bridge_clone_destroy(struct ifnet *ifp)
+{
+ struct bridge_softc *sc = ifp->if_softc;
+ struct bridge_iflist *bif;
+ errno_t error;
+
+ BRIDGE_LOCK(sc);
+ if ((sc->sc_flags & SCF_DETACHING)) {
+ BRIDGE_UNLOCK(sc);
+ return 0;
+ }
+ sc->sc_flags |= SCF_DETACHING;
+
+ bridge_stop(ifp, 1);
+
+ error = ifnet_set_flags(ifp, 0, IFF_UP);
+ if (error != 0) {
+ printf("bridge_clone_destroy: ifnet_set_flags failed %d\n", error);
+ }
+
+ while ((bif = TAILQ_FIRST(&sc->sc_iflist)) != NULL)
+ bridge_delete_member(sc, bif, 0);
+
+ while ((bif = TAILQ_FIRST(&sc->sc_spanlist)) != NULL) {
+ bridge_delete_span(sc, bif);
+ }
+
+ BRIDGE_UNLOCK(sc);
+
+ error = ifnet_detach(ifp);
+ if (error != 0) {
+ panic("bridge_clone_destroy: ifnet_detach(%p) failed %d\n", ifp, error);
+ if ((sc = (struct bridge_softc *)ifnet_softc(ifp)) != NULL) {
+ BRIDGE_LOCK(sc);
+ sc->sc_flags &= ~SCF_DETACHING;
+ BRIDGE_UNLOCK(sc);
+ }
+ return 0;
+ }
+
+ return 0;
+}
+
+#define DRVSPEC do { \
+ if (ifd->ifd_cmd >= bridge_control_table_size) { \
+ error = EINVAL; \
+ break; \
+ } \
+ bc = &bridge_control_table[ifd->ifd_cmd]; \
+ \
+ if (cmd == SIOCGDRVSPEC && \
+ (bc->bc_flags & BC_F_COPYOUT) == 0) { \
+ error = EINVAL; \
+ break; \
+ } \
+ else if (cmd == SIOCSDRVSPEC && \
+ (bc->bc_flags & BC_F_COPYOUT) != 0) { \
+ error = EINVAL; \
+ break; \
+ } \
+ \
+ if (bc->bc_flags & BC_F_SUSER) { \
+ error = kauth_authorize_generic(kauth_cred_get(), KAUTH_GENERIC_ISSUSER); \
+ if (error) \
+ break; \
+ } \
+ \
+ if (ifd->ifd_len != bc->bc_argsize || \
+ ifd->ifd_len > sizeof(args)) { \
+ error = EINVAL; \
+ break; \
+ } \
+ \
+ bzero(&args, sizeof(args)); \
+ if (bc->bc_flags & BC_F_COPYIN) { \
+ error = copyin(ifd->ifd_data, &args, ifd->ifd_len); \
+ if (error) \
+ break; \
+ } \
+ \
+ BRIDGE_LOCK(sc); \
+ error = (*bc->bc_func)(sc, &args); \
+ BRIDGE_UNLOCK(sc); \
+ if (error) \
+ break; \
+ \
+ if (bc->bc_flags & BC_F_COPYOUT) \
+ error = copyout(&args, ifd->ifd_data, ifd->ifd_len); \
+} while (0)
+
+
+/*
+ * bridge_ioctl:
+ *
+ * Handle a control request from the operator.
+ */
+static errno_t
+bridge_ioctl(struct ifnet *ifp, u_long cmd, void *data)
+{
+ struct bridge_softc *sc = ifp->if_softc;
+ struct ifreq *ifr = (struct ifreq *) data;
+ int error = 0;
+
+ lck_mtx_assert(sc->sc_mtx, LCK_MTX_ASSERT_NOTOWNED);
+
+#if BRIDGE_DEBUG
+ if (_if_brige_debug)
+ printf("bridge_ioctl: ifp %p cmd 0x%08lx (%c%c [%lu] %c %lu)\n",
+ ifp,
+ cmd,
+ (cmd & IOC_IN) ? 'I' : ' ',
+ (cmd & IOC_OUT) ? 'O' : ' ',
+ IOCPARM_LEN(cmd),
+ (char)IOCGROUP(cmd),
+ cmd & 0xff);
+#endif
+
+ switch (cmd) {
+
+ case SIOCSIFADDR:
+ case SIOCAIFADDR:
+ ifnet_set_flags(ifp, IFF_UP, IFF_UP);
+ break;
+
+ case SIOCGIFMEDIA32:
+ case SIOCGIFMEDIA64:
+ error = EINVAL;
+ break;
+
+ case SIOCADDMULTI:
+ case SIOCDELMULTI:
+ break;
+
+ case SIOCSDRVSPEC32:
+ case SIOCGDRVSPEC32: {
+ union {
+ struct ifbreq ifbreq;
+ struct ifbifconf32 ifbifconf;
+ struct ifbareq32 ifbareq;
+ struct ifbaconf32 ifbaconf;
+ struct ifbrparam ifbrparam;
+ struct ifbropreq32 ifbropreq;
+ } args;
+ struct ifdrv32 *ifd = (struct ifdrv32 *) data;
+ const struct bridge_control *bridge_control_table = bridge_control_table32, *bc;
+
+ DRVSPEC;
+
+ break;
+ }
+ case SIOCSDRVSPEC64:
+ case SIOCGDRVSPEC64: {
+ union {
+ struct ifbreq ifbreq;
+ struct ifbifconf64 ifbifconf;
+ struct ifbareq64 ifbareq;
+ struct ifbaconf64 ifbaconf;
+ struct ifbrparam ifbrparam;
+ struct ifbropreq64 ifbropreq;
+ } args;
+ struct ifdrv64 *ifd = (struct ifdrv64 *) data;
+ const struct bridge_control *bridge_control_table = bridge_control_table64, *bc;
+
+ DRVSPEC;
+
+ break;
+ }
+
+ case SIOCSIFFLAGS:
+ if (!(ifp->if_flags & IFF_UP) &&
+ (ifp->if_flags & IFF_RUNNING)) {
+ /*
+ * If interface is marked down and it is running,
+ * then stop and disable it.
+ */
+ BRIDGE_LOCK(sc);
+ bridge_stop(ifp, 1);
+ BRIDGE_UNLOCK(sc);
+ } else if ((ifp->if_flags & IFF_UP) &&
+ !(ifp->if_flags & IFF_RUNNING)) {
+ /*
+ * If interface is marked up and it is stopped, then
+ * start it.
+ */
+ BRIDGE_LOCK(sc);
+ error = bridge_init(ifp);
+ BRIDGE_UNLOCK(sc);
+ }
+ break;
+
+ case SIOCSIFLLADDR:
+ error = ifnet_set_lladdr(ifp, ifr->ifr_addr.sa_data, ifr->ifr_addr.sa_len);
+ if (error != 0)
+ printf("bridge_ioctl: ifnet_set_lladdr failed %d\n", error);
+ break;
+
+ case SIOCSIFMTU:
+ /* Do not allow the MTU to be changed on the bridge */
+ error = EINVAL;
+ break;
+
+ default:
+ /*
+ * drop the lock as ether_ioctl() will call bridge_start() and
+ * cause the lock to be recursed.
+ */
+ error = ether_ioctl(ifp, cmd, data);
+#if BRIDGE_DEBUG
+ if (error != 0)
+ printf("bridge_ioctl: ether_ioctl ifp %p cmd 0x%08lx (%c%c [%lu] %c %lu) failed error: %d\n",
+ ifp,
+ cmd,
+ (cmd & IOC_IN) ? 'I' : ' ',
+ (cmd & IOC_OUT) ? 'O' : ' ',
+ IOCPARM_LEN(cmd),
+ (char) IOCGROUP(cmd),
+ cmd & 0xff,
+ error);
+#endif /* BRIDGE_DEBUG */
+ break;
+ }
+ lck_mtx_assert(sc->sc_mtx, LCK_MTX_ASSERT_NOTOWNED);
+
+ return (error);
+}
+
+#if HAS_IF_CAP
+/*
+ * bridge_mutecaps:
+ *
+ * Clear or restore unwanted capabilities on the member interface
+ */
+static void
+bridge_mutecaps(struct bridge_softc *sc)
+{
+ struct bridge_iflist *bif;
+ int enabled, mask;
+
+ /* Initial bitmask of capabilities to test */
+ mask = BRIDGE_IFCAPS_MASK;
+
+ TAILQ_FOREACH(bif, &sc->sc_iflist, bif_next) {
+ /* Every member must support it or its disabled */
+ mask &= bif->bif_savedcaps;
+ }
+
+ TAILQ_FOREACH(bif, &sc->sc_iflist, bif_next) {
+ enabled = bif->bif_ifp->if_capenable;
+ enabled &= ~BRIDGE_IFCAPS_STRIP;
+ /* strip off mask bits and enable them again if allowed */
+ enabled &= ~BRIDGE_IFCAPS_MASK;
+ enabled |= mask;
+
+ bridge_set_ifcap(sc, bif, enabled);
+ }
+
+}
+
+static void
+bridge_set_ifcap(struct bridge_softc *sc, struct bridge_iflist *bif, int set)
+{
+ struct ifnet *ifp = bif->bif_ifp;
+ struct ifreq ifr;
+ int error;
+
+ bzero(&ifr, sizeof(ifr));
+ ifr.ifr_reqcap = set;
+
+ if (ifp->if_capenable != set) {
+ IFF_LOCKGIANT(ifp);
+ error = (*ifp->if_ioctl)(ifp, SIOCSIFCAP, (caddr_t)&ifr);
+ IFF_UNLOCKGIANT(ifp);
+ if (error)
+ printf("error setting interface capabilities on %s\n",
+ ifnet_name(sc->sc_ifp), ifnet_unit(sc->sc_ifp),
+ ifp->if_xname);
+ }
+}
+#endif /* HAS_IF_CAP */
+
+/*
+ * bridge_lookup_member:
+ *
+ * Lookup a bridge member interface.
+ */
+static struct bridge_iflist *
+bridge_lookup_member(struct bridge_softc *sc, const char *name)
+{
+ struct bridge_iflist *bif;
+ struct ifnet *ifp;
+ char if_xname[IFNAMSIZ];
+
+ BRIDGE_LOCK_ASSERT(sc);
+
+ TAILQ_FOREACH(bif, &sc->sc_iflist, bif_next) {
+ ifp = bif->bif_ifp;
+ snprintf(if_xname, sizeof(if_xname), "%s%d",
+ ifnet_name(ifp), ifnet_unit(ifp));
+ if (strncmp(if_xname, name, sizeof(if_xname)) == 0)
+ return (bif);
+ }
+
+ return (NULL);
+}
+
+/*
+ * bridge_lookup_member_if:
+ *
+ * Lookup a bridge member interface by ifnet*.
+ */
+static struct bridge_iflist *
+bridge_lookup_member_if(struct bridge_softc *sc, struct ifnet *member_ifp)
+{
+ struct bridge_iflist *bif;
+
+ BRIDGE_LOCK_ASSERT(sc);
+
+ TAILQ_FOREACH(bif, &sc->sc_iflist, bif_next) {
+ if (bif->bif_ifp == member_ifp)
+ return (bif);
+ }
+
+ return (NULL);
+}
+
+static errno_t
+bridge_iff_input(void* cookie, ifnet_t ifp, __unused protocol_family_t protocol,
+ mbuf_t *data, char **frame_ptr)
+{
+ errno_t error = 0;
+ struct bridge_iflist *bif = (struct bridge_iflist *)cookie;
+ struct bridge_softc *sc = bif->bif_sc;
+ int included = 0;
+ size_t frmlen = 0;
+ mbuf_t m = *data;
+
+ if ((m->m_flags & M_PROTO1))
+ goto out;
+
+ if (*frame_ptr >= (char *)mbuf_datastart(m) && *frame_ptr <= (char *)mbuf_data(m)) {
+ included = 1;
+ frmlen = (char *)mbuf_data(m) - *frame_ptr;
+ }
+#if BRIDGE_DEBUG
+ if (_if_brige_debug) {
+ printf("bridge_iff_input %s%d from %s%d m %p data %p frame %p %s frmlen %lu\n",
+ ifnet_name(sc->sc_ifp), ifnet_unit(sc->sc_ifp),
+ ifnet_name(ifp), ifnet_unit(ifp),
+ m, mbuf_data(m), *frame_ptr, included ? "inside" : "outside", frmlen);
+
+ if (_if_brige_debug > 1) {
+ printf_mbuf(m, "bridge_iff_input[", "\n");
+ printf_ether_header((struct ether_header *)*frame_ptr);
+ printf_mbuf_data(m, 0, 20);
+ printf("\n");
+ }
+ }
+#endif /* BRIDGE_DEBUG */
+
+ /* Move data pointer to start of frame to the link layer header */
+ if (included) {
+ (void) mbuf_setdata(m, (char *)mbuf_data(m) - frmlen, mbuf_len(m) + frmlen);
+ (void) mbuf_pkthdr_adjustlen(m, frmlen);
+ } else {
+ printf("bridge_iff_input: frame_ptr outside mbuf\n");
+ goto out;
+ }
+
+ error = bridge_input(ifp, m, *frame_ptr);
+
+ /* Adjust packet back to original */
+ if (error == 0) {
+ (void) mbuf_setdata(m, (char *)mbuf_data(m) + frmlen, mbuf_len(m) - frmlen);
+ (void) mbuf_pkthdr_adjustlen(m, -frmlen);
+ }
+#if BRIDGE_DEBUG
+ if (_if_brige_debug > 1) {
+ printf("\n");
+ printf_mbuf(m, "bridge_iff_input]", "\n");
+ }
+#endif /* BRIDGE_DEBUG */
+
+out:
+ lck_mtx_assert(sc->sc_mtx, LCK_MTX_ASSERT_NOTOWNED);
+
+ return error;
+}
+
+
+#if BRIDGE_MEMBER_OUT_FILTER
+static errno_t
+bridge_iff_output(void *cookie, ifnet_t ifp, __unused protocol_family_t protocol, mbuf_t *data)
+{
+ errno_t error = 0;
+ struct bridge_iflist *bif = (struct bridge_iflist *)cookie;
+ struct bridge_softc *sc = bif->bif_sc;
+ mbuf_t m = *data;
+
+ if ((m->m_flags & M_PROTO1))
+ goto out;
+
+#if BRIDGE_DEBUG
+ if (_if_brige_debug) {
+ printf("bridge_iff_output %s%d from %s%d m %p data %p\n",
+ ifnet_name(sc->sc_ifp), ifnet_unit(sc->sc_ifp),
+ ifnet_name(ifp), ifnet_unit(ifp),
+ m, mbuf_data(m));
+ }
+#endif /* BRIDGE_DEBUG */
+
+ error = bridge_output(sc, ifp, m);
+ if (error != 0) {
+ printf("bridge_iff_output: bridge_output failed error %d\n", error);
+ }
+
+out:
+ lck_mtx_assert(sc->sc_mtx, LCK_MTX_ASSERT_NOTOWNED);
+
+ return error;
+}
+#endif /* BRIDGE_MEMBER_OUT_FILTER */
+
+
+static void
+bridge_iff_event(void* cookie, ifnet_t ifp, __unused protocol_family_t protocol,
+ const struct kev_msg *event_msg)
+{
+ struct bridge_iflist *bif = (struct bridge_iflist *)cookie;
+
+ if (event_msg->vendor_code == KEV_VENDOR_APPLE &&
+ event_msg->kev_class == KEV_NETWORK_CLASS &&
+ event_msg->kev_subclass == KEV_DL_SUBCLASS) {
+ switch (event_msg->event_code) {
+ case KEV_DL_IF_DETACHING:
+ case KEV_DL_IF_DETACHED:
+ bridge_ifdetach(bif, ifp);
+ break;
+
+ case KEV_DL_LINK_OFF:
+ case KEV_DL_LINK_ON: {
+ bstp_linkstate(ifp, event_msg->event_code);
+ break;
+ }
+
+ case KEV_DL_SIFFLAGS: {
+ if (bif->bif_promisc == 0 && (ifp->if_flags & IFF_UP)) {
+ errno_t error = ifnet_set_promiscuous(ifp, 1);
+ if (error != 0) {
+ printf("bridge_iff_event: ifnet_set_promiscuous(%s%d) failed %d\n",
+ ifnet_name(ifp), ifnet_unit(ifp), error);
+ } else {
+ bif->bif_promisc = 1;
+ }
+ }
+ break;
+ }
+
+ default:
+ break;
+ }
+ }
+}
+
+/*
+ * bridge_iff_detached:
+ *
+ * Detach an interface from a bridge. Called when a member
+ * interface is detaching.
+ */
+static void
+bridge_iff_detached(void* cookie, __unused ifnet_t ifp)
+{
+ struct bridge_iflist *bif = (struct bridge_iflist *)cookie;
+
+#if BRIDGE_DEBUG
+ printf("bridge_iff_detached: %s%d\n",
+ ifnet_name(ifp), ifnet_unit(ifp));
+#endif
+
+ bridge_ifdetach(bif, ifp);
+
+ _FREE(bif, M_DEVBUF);
+
+ return;
+}
+
+static errno_t
+bridge_proto_input(ifnet_t ifp, __unused protocol_family_t protocol,
+ __unused mbuf_t packet, __unused char *header)
+{
+ printf("bridge_proto_input: unexpected packet from %s%d\n",
+ ifnet_name(ifp), ifnet_unit(ifp));
+ return 0;
+}
+
+static int
+bridge_attach_protocol(struct ifnet *ifp)
+{
+ int error;
+ struct ifnet_attach_proto_param reg;
+
+ printf("bridge_attach_protocol: %s%d\n",
+ ifnet_name(ifp), ifnet_unit(ifp));
+
+ bzero(®, sizeof(reg));
+ reg.input = bridge_proto_input;
+
+ error = ifnet_attach_protocol(ifp, PF_BRIDGE, ®);
+ if (error)
+ printf("bridge_attach_protocol: ifnet_attach_protocol(%s%d) failed, %d\n",
+ ifnet_name(ifp), ifnet_unit(ifp), error);
+
+ return (error);
+}
+
+static int
+bridge_detach_protocol(struct ifnet *ifp)
+{
+ int error;
+
+ printf("bridge_detach_protocol: %s%d\n",
+ ifnet_name(ifp), ifnet_unit(ifp));
+
+ error = ifnet_detach_protocol(ifp, PF_BRIDGE);
+ if (error)
+ printf("bridge_attach_protocol: ifnet_detach_protocol(%s%d) failed, %d\n",
+ ifnet_name(ifp), ifnet_unit(ifp), error);
+
+ return (error);
+}
+
+/*
+ * bridge_delete_member:
+ *
+ * Delete the specified member interface.
+ */
+static void
+bridge_delete_member(struct bridge_softc *sc, struct bridge_iflist *bif,
+ int gone)
+{
+ struct ifnet *ifs = bif->bif_ifp;
+
+ BRIDGE_LOCK_ASSERT(sc);
+
+ if (!gone) {
+ switch (ifs->if_type) {
+ case IFT_ETHER:
+ case IFT_L2VLAN:
+ /*
+ * Take the interface out of promiscuous mode.
+ */
+ if (bif->bif_promisc)
+ (void) ifnet_set_promiscuous(ifs, 0);
+ break;
+
+ case IFT_GIF:
+ break;
+
+ default:
+#ifdef DIAGNOSTIC
+ panic("bridge_delete_member: impossible");
+#endif
+ break;
+ }
+
+#if HAS_IF_CAP
+ /* reneable any interface capabilities */
+ bridge_set_ifcap(sc, bif, bif->bif_savedcaps);
+#endif
+ }
+
+ if (bif->bif_proto_attached) {
+ /* Respect lock ordering with DLIL lock */
+ BRIDGE_UNLOCK(sc);
+ (void) bridge_detach_protocol(ifs);
+ BRIDGE_LOCK(sc);
+ }
+ if (bif->bif_flags & IFBIF_STP)
+ bstp_disable(&bif->bif_stp);
+
+ ifs->if_bridge = NULL;
+ BRIDGE_XLOCK(sc);
+ TAILQ_REMOVE(&sc->sc_iflist, bif, bif_next);
+ BRIDGE_XDROP(sc);
+
+ ifnet_release(ifs);
+
+#if HAS_IF_CAP
+ bridge_mutecaps(sc); /* recalcuate now this interface is removed */
+#endif /* HAS_IF_CAP */
+ bridge_rtdelete(sc, ifs, IFBF_FLUSHALL);
+ KASSERT(bif->bif_addrcnt == 0,
+ ("%s: %d bridge routes referenced", __func__, bif->bif_addrcnt));
+
+ BRIDGE_UNLOCK(sc);
+ bstp_destroy(&bif->bif_stp); /* prepare to free */
+ BRIDGE_LOCK(sc);
+
+ if (bif->bif_filter_attached) {
+ /* Respect lock ordering with DLIL lock */
+ BRIDGE_UNLOCK(sc);
+ iflt_detach(bif->bif_iff_ref);
+ BRIDGE_LOCK(sc);
+ } else {
+ _FREE(bif, M_DEVBUF);
+ }
+}
+
+/*
+ * bridge_delete_span:
+ *
+ * Delete the specified span interface.
+ */
+static void
+bridge_delete_span(struct bridge_softc *sc, struct bridge_iflist *bif)
+{
+ BRIDGE_LOCK_ASSERT(sc);
+
+ KASSERT(bif->bif_ifp->if_bridge == NULL,
+ ("%s: not a span interface", __func__));
+
+ ifnet_release(bif->bif_ifp);
+
+ TAILQ_REMOVE(&sc->sc_spanlist, bif, bif_next);
+ _FREE(bif, M_DEVBUF);
+}
+
+static int
+bridge_ioctl_add(struct bridge_softc *sc, void *arg)
+{
+ struct ifbreq *req = arg;
+ struct bridge_iflist *bif = NULL;
+ struct ifnet *ifs;
+ int error = 0;
+ struct iff_filter iff;
+
+ ifs = ifunit(req->ifbr_ifsname);
+ if (ifs == NULL)
+ return (ENOENT);
+ if (ifs->if_ioctl == NULL) /* must be supported */
+ return (EINVAL);
+
+ /* If it's in the span list, it can't be a member. */
+ TAILQ_FOREACH(bif, &sc->sc_spanlist, bif_next)
+ if (ifs == bif->bif_ifp)
+ return (EBUSY);
+
+ /* Allow the first Ethernet member to define the MTU */
+ if (ifs->if_type != IFT_GIF) {
+ if (TAILQ_EMPTY(&sc->sc_iflist))
+ sc->sc_ifp->if_mtu = ifs->if_mtu;
+ else if (sc->sc_ifp->if_mtu != ifs->if_mtu) {
+ printf("%s%d: invalid MTU for %s%d",
+ ifnet_name(sc->sc_ifp), ifnet_unit(sc->sc_ifp),
+ ifnet_name(ifs), ifnet_unit(ifs));
+ return (EINVAL);
+ }
+ }
+
+ if (ifs->if_bridge == sc)
+ return (EEXIST);
+
+ if (ifs->if_bridge != NULL)
+ return (EBUSY);
+
+ bif = _MALLOC(sizeof(*bif), M_DEVBUF, M_NOWAIT|M_ZERO);
+ if (bif == NULL)
+ return (ENOMEM);
+
+ bif->bif_ifp = ifs;
+ bif->bif_flags = IFBIF_LEARNING | IFBIF_DISCOVER;
+#if HAS_IF_CAP
+ bif->bif_savedcaps = ifs->if_capenable;
+#endif /* HAS_IF_CAP */
+ bif->bif_sc = sc;
+
+ ifnet_reference(ifs);
+
+ ifs->if_bridge = sc;
+ bstp_create(&sc->sc_stp, &bif->bif_stp, bif->bif_ifp);
+ /*
+ * XXX: XLOCK HERE!?!
+ */
+ TAILQ_INSERT_TAIL(&sc->sc_iflist, bif, bif_next);
+
+#if HAS_IF_CAP
+ /* Set interface capabilities to the intersection set of all members */
+ bridge_mutecaps(sc);
+#endif /* HAS_IF_CAP */
+
+
+ switch (ifs->if_type) {
+ case IFT_ETHER:
+ case IFT_L2VLAN:
+ /*
+ * Place the interface into promiscuous mode.
+ */
+ error = ifnet_set_promiscuous(ifs, 1);
+ if (error) {
+ /* Ignore error when device is not up */
+ if (error != ENETDOWN)
+ goto out;
+ error = 0;
+ } else {
+ bif->bif_promisc = 1;
+ }
+ break;
+
+ case IFT_GIF:
+ break;
+
+ default:
+ error = EINVAL;
+ goto out;
+ }
+
+ /*
+ * Respect lock ordering with DLIL lock for the following operations
+ */
+ BRIDGE_UNLOCK(sc);
+
+ /*
+ * install an interface filter
+ */
+ memset(&iff, 0, sizeof(struct iff_filter));
+ iff.iff_cookie = bif;
+ iff.iff_name = "com.apple.kernel.bsd.net.if_bridge";
+ iff.iff_input = bridge_iff_input;
+#if BRIDGE_MEMBER_OUT_FILTER
+ iff.iff_output = bridge_iff_output;
+#endif /* BRIDGE_MEMBER_OUT_FILTER */
+ iff.iff_event = bridge_iff_event;
+ iff.iff_detached = bridge_iff_detached;
+ error = iflt_attach(ifs, &iff, &bif->bif_iff_ref);
+ if (error != 0) {
+ printf("bridge_ioctl_add: iflt_attach failed %d\n", error);
+ BRIDGE_LOCK(sc);
+ goto out;
+ }
+ bif->bif_filter_attached = 1;
+
+ /*
+ * install an dummy "bridge" protocol
+ */
+ if ((error = bridge_attach_protocol(ifs)) != 0) {
+ if (error != 0) {
+ printf("bridge_ioctl_add: bridge_attach_protocol failed %d\n", error);
+ BRIDGE_LOCK(sc);
+ goto out;
+ }
+ }
+ bif->bif_proto_attached = 1;
+
+ BRIDGE_LOCK(sc);
+
+out:
+ if (error && bif != NULL)
+ bridge_delete_member(sc, bif, 1);
+
+ return (error);
+}
+
+static int
+bridge_ioctl_del(struct bridge_softc *sc, void *arg)
+{
+ struct ifbreq *req = arg;
+ struct bridge_iflist *bif;
+
+ bif = bridge_lookup_member(sc, req->ifbr_ifsname);
+ if (bif == NULL)
+ return (ENOENT);
+
+ bridge_delete_member(sc, bif, 0);
+
+ return (0);
+}
+
+static int
+bridge_ioctl_purge(__unused struct bridge_softc *sc, __unused void *arg)
+{
+ return (0);
+}
+
+static int
+bridge_ioctl_gifflags(struct bridge_softc *sc, void *arg)
+{
+ struct ifbreq *req = arg;
+ struct bridge_iflist *bif;
+ struct bstp_port *bp;
+
+ bif = bridge_lookup_member(sc, req->ifbr_ifsname);
+ if (bif == NULL)
+ return (ENOENT);
+
+ bp = &bif->bif_stp;
+ req->ifbr_ifsflags = bif->bif_flags;
+ req->ifbr_state = bp->bp_state;
+ req->ifbr_priority = bp->bp_priority;
+ req->ifbr_path_cost = bp->bp_path_cost;
+ req->ifbr_portno = bif->bif_ifp->if_index & 0xfff;
+ req->ifbr_proto = bp->bp_protover;
+ req->ifbr_role = bp->bp_role;
+ req->ifbr_stpflags = bp->bp_flags;
+ req->ifbr_addrcnt = bif->bif_addrcnt;
+ req->ifbr_addrmax = bif->bif_addrmax;
+ req->ifbr_addrexceeded = bif->bif_addrexceeded;
+
+ /* Copy STP state options as flags */
+ if (bp->bp_operedge)
+ req->ifbr_ifsflags |= IFBIF_BSTP_EDGE;
+ if (bp->bp_flags & BSTP_PORT_AUTOEDGE)
+ req->ifbr_ifsflags |= IFBIF_BSTP_AUTOEDGE;
+ if (bp->bp_ptp_link)
+ req->ifbr_ifsflags |= IFBIF_BSTP_PTP;
+ if (bp->bp_flags & BSTP_PORT_AUTOPTP)
+ req->ifbr_ifsflags |= IFBIF_BSTP_AUTOPTP;
+ if (bp->bp_flags & BSTP_PORT_ADMEDGE)
+ req->ifbr_ifsflags |= IFBIF_BSTP_ADMEDGE;
+ if (bp->bp_flags & BSTP_PORT_ADMCOST)
+ req->ifbr_ifsflags |= IFBIF_BSTP_ADMCOST;
+ return (0);
+}
+
+static int
+bridge_ioctl_sifflags(struct bridge_softc *sc, void *arg)
+{
+ struct ifbreq *req = arg;
+ struct bridge_iflist *bif;
+ struct bstp_port *bp;
+ int error;
+
+ bif = bridge_lookup_member(sc, req->ifbr_ifsname);
+ if (bif == NULL)
+ return (ENOENT);
+ bp = &bif->bif_stp;
+
+ if (req->ifbr_ifsflags & IFBIF_SPAN)
+ /* SPAN is readonly */
+ return (EINVAL);
+
+
+ if (req->ifbr_ifsflags & IFBIF_STP) {
+ if ((bif->bif_flags & IFBIF_STP) == 0) {
+ error = bstp_enable(&bif->bif_stp);
+ if (error)
+ return (error);
+ }
+ } else {
+ if ((bif->bif_flags & IFBIF_STP) != 0)
+ bstp_disable(&bif->bif_stp);
+ }
+
+ /* Pass on STP flags */
+ bstp_set_edge(bp, req->ifbr_ifsflags & IFBIF_BSTP_EDGE ? 1 : 0);
+ bstp_set_autoedge(bp, req->ifbr_ifsflags & IFBIF_BSTP_AUTOEDGE ? 1 : 0);
+ bstp_set_ptp(bp, req->ifbr_ifsflags & IFBIF_BSTP_PTP ? 1 : 0);
+ bstp_set_autoptp(bp, req->ifbr_ifsflags & IFBIF_BSTP_AUTOPTP ? 1 : 0);
+
+ /* Save the bits relating to the bridge */
+ bif->bif_flags = req->ifbr_ifsflags & IFBIFMASK;
+
+
+ return (0);
+}
+
+static int
+bridge_ioctl_scache(struct bridge_softc *sc, void *arg)
+{
+ struct ifbrparam *param = arg;
+
+ sc->sc_brtmax = param->ifbrp_csize;
+ bridge_rttrim(sc);
+
+ return (0);
+}
+
+static int
+bridge_ioctl_gcache(struct bridge_softc *sc, void *arg)
+{
+ struct ifbrparam *param = arg;
+
+ param->ifbrp_csize = sc->sc_brtmax;
+
+ return (0);
+}
+
+
+#define BRIDGE_IOCTL_GIFS do { \
+ struct bridge_iflist *bif; \
+ struct ifbreq breq; \
+ char *buf, *outbuf; \
+ unsigned int count, buflen, len; \
+ \
+ count = 0; \
+ TAILQ_FOREACH(bif, &sc->sc_iflist, bif_next) \
+ count++; \
+ TAILQ_FOREACH(bif, &sc->sc_spanlist, bif_next) \
+ count++; \
+ \
+ buflen = sizeof(breq) * count; \
+ if (bifc->ifbic_len == 0) { \
+ bifc->ifbic_len = buflen; \
+ return (0); \
+ } \
+ BRIDGE_UNLOCK(sc); \
+ outbuf = _MALLOC(buflen, M_TEMP, M_WAITOK | M_ZERO); \
+ BRIDGE_LOCK(sc); \
+ \
+ count = 0; \
+ buf = outbuf; \
+ len = min(bifc->ifbic_len, buflen); \
+ bzero(&breq, sizeof(breq)); \
+ TAILQ_FOREACH(bif, &sc->sc_iflist, bif_next) { \
+ if (len < sizeof(breq)) \
+ break; \
+ \
+ snprintf(breq.ifbr_ifsname, sizeof(breq.ifbr_ifsname), "%s%d", \
+ ifnet_name(bif->bif_ifp), ifnet_unit(bif->bif_ifp)); \
+ /* Fill in the ifbreq structure */ \
+ error = bridge_ioctl_gifflags(sc, &breq); \
+ if (error) \
+ break; \
+ memcpy(buf, &breq, sizeof(breq)); \
+ count++; \
+ buf += sizeof(breq); \
+ len -= sizeof(breq); \
+ } \
+ TAILQ_FOREACH(bif, &sc->sc_spanlist, bif_next) { \
+ if (len < sizeof(breq)) \
+ break; \
+ \
+ snprintf(breq.ifbr_ifsname, sizeof(breq.ifbr_ifsname), "%s%d", \
+ ifnet_name(bif->bif_ifp), ifnet_unit(bif->bif_ifp)); \
+ breq.ifbr_ifsflags = bif->bif_flags; \
+ breq.ifbr_portno = bif->bif_ifp->if_index & 0xfff; \
+ memcpy(buf, &breq, sizeof(breq)); \
+ count++; \
+ buf += sizeof(breq); \
+ len -= sizeof(breq); \
+ } \
+ \
+ BRIDGE_UNLOCK(sc); \
+ bifc->ifbic_len = sizeof(breq) * count; \
+ error = copyout(outbuf, bifc->ifbic_req, bifc->ifbic_len); \
+ BRIDGE_LOCK(sc); \
+ _FREE(outbuf, M_TEMP); \
+} while (0)
+
+static int
+bridge_ioctl_gifs64(struct bridge_softc *sc, void *arg)
+{
+ struct ifbifconf64 *bifc = arg;
+ int error = 0;
+
+ BRIDGE_IOCTL_GIFS;
+
+ return (error);
+}
+
+static int
+bridge_ioctl_gifs32(struct bridge_softc *sc, void *arg)
+{
+ struct ifbifconf32 *bifc = arg;
+ int error = 0;
+
+ BRIDGE_IOCTL_GIFS;
+
+ return (error);
+}
+
+
+#define BRIDGE_IOCTL_RTS do { \
+ struct bridge_rtnode *brt; \
+ char *buf, *outbuf; \
+ unsigned int count, buflen, len; \
+ struct timespec now; \
+ \
+ if (bac->ifbac_len == 0) \
+ return (0); \
+ \
+ count = 0; \
+ LIST_FOREACH(brt, &sc->sc_rtlist, brt_list) \
+ count++; \
+ buflen = sizeof(bareq) * count; \
+ \
+ BRIDGE_UNLOCK(sc); \
+ outbuf = _MALLOC(buflen, M_TEMP, M_WAITOK | M_ZERO); \
+ BRIDGE_LOCK(sc); \
+ \
+ count = 0; \
+ buf = outbuf; \
+ len = min(bac->ifbac_len, buflen); \
+ bzero(&bareq, sizeof(bareq)); \
+ LIST_FOREACH(brt, &sc->sc_rtlist, brt_list) { \
+ if (len < sizeof(bareq)) \
+ goto out; \
+ snprintf(bareq.ifba_ifsname, sizeof(bareq.ifba_ifsname), "%s%d", \
+ ifnet_name(brt->brt_ifp), ifnet_unit(brt->brt_ifp)); \
+ memcpy(bareq.ifba_dst, brt->brt_addr, sizeof(brt->brt_addr)); \
+ bareq.ifba_vlan = brt->brt_vlan; \
+ if ((brt->brt_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC) { \
+ nanouptime(&now); \
+ if ((unsigned long)now.tv_sec < brt->brt_expire) \
+ bareq.ifba_expire = brt->brt_expire - now.tv_sec; \
+ } else \
+ bareq.ifba_expire = 0; \
+ bareq.ifba_flags = brt->brt_flags; \
+ \
+ memcpy(buf, &bareq, sizeof(bareq)); \
+ count++; \
+ buf += sizeof(bareq); \
+ len -= sizeof(bareq); \
+ } \
+out: \
+ BRIDGE_UNLOCK(sc); \
+ bac->ifbac_len = sizeof(bareq) * count; \
+ error = copyout(outbuf, bac->ifbac_req, bac->ifbac_len); \
+ BRIDGE_LOCK(sc); \
+ _FREE(outbuf, M_TEMP); \
+ return (error); \
+} while (0)
+
+static int
+bridge_ioctl_rts64(struct bridge_softc *sc, void *arg)
+{
+ struct ifbaconf64 *bac = arg;
+ struct ifbareq64 bareq;
+ int error = 0;
+
+ BRIDGE_IOCTL_RTS;
+
+ return (error);
+}
+
+static int
+bridge_ioctl_rts32(struct bridge_softc *sc, void *arg)
+{
+ struct ifbaconf32 *bac = arg;
+ struct ifbareq32 bareq;
+ int error = 0;
+
+ BRIDGE_IOCTL_RTS;
+
+ return (error);
+}
+
+static int
+bridge_ioctl_saddr32(struct bridge_softc *sc, void *arg)
+{
+ struct ifbareq32 *req = arg;
+ struct bridge_iflist *bif;
+ int error;
+
+ bif = bridge_lookup_member(sc, req->ifba_ifsname);
+ if (bif == NULL)
+ return (ENOENT);
+
+ error = bridge_rtupdate(sc, req->ifba_dst, req->ifba_vlan, bif, 1,
+ req->ifba_flags);
+
+ return (error);
+}
+
+static int
+bridge_ioctl_saddr64(struct bridge_softc *sc, void *arg)
+{
+ struct ifbareq64 *req = arg;
+ struct bridge_iflist *bif;
+ int error;
+
+ bif = bridge_lookup_member(sc, req->ifba_ifsname);
+ if (bif == NULL)
+ return (ENOENT);
+
+ error = bridge_rtupdate(sc, req->ifba_dst, req->ifba_vlan, bif, 1,
+ req->ifba_flags);
+
+ return (error);
+}
+
+static int
+bridge_ioctl_sto(struct bridge_softc *sc, void *arg)
+{
+ struct ifbrparam *param = arg;
+
+ sc->sc_brttimeout = param->ifbrp_ctime;
+ return (0);
+}
+
+static int
+bridge_ioctl_gto(struct bridge_softc *sc, void *arg)
+{
+ struct ifbrparam *param = arg;
+
+ param->ifbrp_ctime = sc->sc_brttimeout;
+ return (0);
+}
+
+static int
+bridge_ioctl_daddr32(struct bridge_softc *sc, void *arg)
+{
+ struct ifbareq32 *req = arg;
+
+ return (bridge_rtdaddr(sc, req->ifba_dst, req->ifba_vlan));
+}
+
+static int
+bridge_ioctl_daddr64(struct bridge_softc *sc, void *arg)
+{
+ struct ifbareq64 *req = arg;
+
+ return (bridge_rtdaddr(sc, req->ifba_dst, req->ifba_vlan));
+}
+
+static int
+bridge_ioctl_flush(struct bridge_softc *sc, void *arg)
+{
+ struct ifbreq *req = arg;
+
+ bridge_rtflush(sc, req->ifbr_ifsflags);
+ return (0);
+}
+
+static int
+bridge_ioctl_gpri(struct bridge_softc *sc, void *arg)
+{
+ struct ifbrparam *param = arg;
+ struct bstp_state *bs = &sc->sc_stp;
+
+ param->ifbrp_prio = bs->bs_bridge_priority;
+ return (0);
+}
+
+static int
+bridge_ioctl_spri(struct bridge_softc *sc, void *arg)
+{
+ struct ifbrparam *param = arg;
+
+ return (bstp_set_priority(&sc->sc_stp, param->ifbrp_prio));
+}
+
+static int
+bridge_ioctl_ght(struct bridge_softc *sc, void *arg)
+{
+ struct ifbrparam *param = arg;
+ struct bstp_state *bs = &sc->sc_stp;
+
+ param->ifbrp_hellotime = bs->bs_bridge_htime >> 8;
+ return (0);
+}
+
+static int
+bridge_ioctl_sht(struct bridge_softc *sc, void *arg)
+{
+ struct ifbrparam *param = arg;
+
+ return (bstp_set_htime(&sc->sc_stp, param->ifbrp_hellotime));
+}
+
+static int
+bridge_ioctl_gfd(struct bridge_softc *sc, void *arg)
+{
+ struct ifbrparam *param = arg;
+ struct bstp_state *bs = &sc->sc_stp;
+
+ param->ifbrp_fwddelay = bs->bs_bridge_fdelay >> 8;
+ return (0);
+}
+
+static int
+bridge_ioctl_sfd(struct bridge_softc *sc, void *arg)
+{
+ struct ifbrparam *param = arg;
+
+ return (bstp_set_fdelay(&sc->sc_stp, param->ifbrp_fwddelay));
+}
+
+static int
+bridge_ioctl_gma(struct bridge_softc *sc, void *arg)
+{
+ struct ifbrparam *param = arg;
+ struct bstp_state *bs = &sc->sc_stp;
+
+ param->ifbrp_maxage = bs->bs_bridge_max_age >> 8;
+ return (0);
+}
+
+static int
+bridge_ioctl_sma(struct bridge_softc *sc, void *arg)
+{
+ struct ifbrparam *param = arg;
+
+ return (bstp_set_maxage(&sc->sc_stp, param->ifbrp_maxage));
+}
+
+static int
+bridge_ioctl_sifprio(struct bridge_softc *sc, void *arg)
+{
+ struct ifbreq *req = arg;
+ struct bridge_iflist *bif;
+
+ bif = bridge_lookup_member(sc, req->ifbr_ifsname);
+ if (bif == NULL)
+ return (ENOENT);
+
+ return (bstp_set_port_priority(&bif->bif_stp, req->ifbr_priority));
+}
+
+static int
+bridge_ioctl_sifcost(struct bridge_softc *sc, void *arg)
+{
+ struct ifbreq *req = arg;
+ struct bridge_iflist *bif;
+
+ bif = bridge_lookup_member(sc, req->ifbr_ifsname);
+ if (bif == NULL)
+ return (ENOENT);
+
+ return (bstp_set_path_cost(&bif->bif_stp, req->ifbr_path_cost));
+}
+
+static int
+bridge_ioctl_gfilt(struct bridge_softc *sc, void *arg)
+{
+ struct ifbrparam *param = arg;
+
+ param->ifbrp_filter = sc->sc_filter_flags;
+
+ return (0);
+}
+
+static int
+bridge_ioctl_sfilt(struct bridge_softc *sc, void *arg)
+{
+ struct ifbrparam *param = arg;
+
+ if (param->ifbrp_filter & ~IFBF_FILT_MASK)
+ return (EINVAL);
+
+#ifndef BRIDGE_IPF
+ if (param->ifbrp_filter & IFBF_FILT_USEIPF)
+ return (EINVAL);
+#endif
+
+ sc->sc_filter_flags = param->ifbrp_filter;
+
+ return (0);
+}
+
+static int
+bridge_ioctl_sifmaxaddr(struct bridge_softc *sc, void *arg)
+{
+ struct ifbreq *req = arg;
+ struct bridge_iflist *bif;
+
+ bif = bridge_lookup_member(sc, req->ifbr_ifsname);
+ if (bif == NULL)
+ return (ENOENT);
+
+ bif->bif_addrmax = req->ifbr_addrmax;
+ return (0);
+}
+
+static int
+bridge_ioctl_addspan(struct bridge_softc *sc, void *arg)
+{
+ struct ifbreq *req = arg;
+ struct bridge_iflist *bif = NULL;
+ struct ifnet *ifs;
+
+ ifs = ifunit(req->ifbr_ifsname);
+ if (ifs == NULL)
+ return (ENOENT);
+
+ TAILQ_FOREACH(bif, &sc->sc_spanlist, bif_next)
+ if (ifs == bif->bif_ifp)
+ return (EBUSY);
+
+ if (ifs->if_bridge != NULL)
+ return (EBUSY);
+
+ switch (ifs->if_type) {
+ case IFT_ETHER:
+ case IFT_GIF:
+ case IFT_L2VLAN:
+ break;
+ default:
+ return (EINVAL);
+ }
+
+ bif = _MALLOC(sizeof(*bif), M_DEVBUF, M_NOWAIT|M_ZERO);
+ if (bif == NULL)
+ return (ENOMEM);
+
+ bif->bif_ifp = ifs;
+ bif->bif_flags = IFBIF_SPAN;
+
+ ifnet_reference(bif->bif_ifp);
+
+ TAILQ_INSERT_HEAD(&sc->sc_spanlist, bif, bif_next);
+
+ return (0);
+}
+
+static int
+bridge_ioctl_delspan(struct bridge_softc *sc, void *arg)
+{
+ struct ifbreq *req = arg;
+ struct bridge_iflist *bif;
+ struct ifnet *ifs;
+
+ ifs = ifunit(req->ifbr_ifsname);
+ if (ifs == NULL)
+ return (ENOENT);
+
+ TAILQ_FOREACH(bif, &sc->sc_spanlist, bif_next)
+ if (ifs == bif->bif_ifp)
+ break;
+
+ if (bif == NULL)
+ return (ENOENT);
+
+ bridge_delete_span(sc, bif);
+
+ return (0);
+}
+
+#define BRIDGE_IOCTL_GBPARAM do { \
+ struct bstp_state *bs = &sc->sc_stp; \
+ struct bstp_port *root_port; \
+ \
+ req->ifbop_maxage = bs->bs_bridge_max_age >> 8; \
+ req->ifbop_hellotime = bs->bs_bridge_htime >> 8; \
+ req->ifbop_fwddelay = bs->bs_bridge_fdelay >> 8; \
+ \
+ root_port = bs->bs_root_port; \
+ if (root_port == NULL) \
+ req->ifbop_root_port = 0; \
+ else \
+ req->ifbop_root_port = root_port->bp_ifp->if_index; \
+ \
+ req->ifbop_holdcount = bs->bs_txholdcount; \
+ req->ifbop_priority = bs->bs_bridge_priority; \
+ req->ifbop_protocol = bs->bs_protover; \
+ req->ifbop_root_path_cost = bs->bs_root_pv.pv_cost; \
+ req->ifbop_bridgeid = bs->bs_bridge_pv.pv_dbridge_id; \
+ req->ifbop_designated_root = bs->bs_root_pv.pv_root_id; \
+ req->ifbop_designated_bridge = bs->bs_root_pv.pv_dbridge_id; \
+ req->ifbop_last_tc_time.tv_sec = bs->bs_last_tc_time.tv_sec; \
+ req->ifbop_last_tc_time.tv_usec = bs->bs_last_tc_time.tv_usec; \
+} while (0)
+
+static int
+bridge_ioctl_gbparam32(struct bridge_softc *sc, void *arg)
+{
+ struct ifbropreq32 *req = arg;
+
+ BRIDGE_IOCTL_GBPARAM;
+
+ return (0);
+}
+
+static int
+bridge_ioctl_gbparam64(struct bridge_softc *sc, void *arg)
+{
+ struct ifbropreq64 *req = arg;
+
+ BRIDGE_IOCTL_GBPARAM;
+
+ return (0);
+}
+
+
+static int
+bridge_ioctl_grte(struct bridge_softc *sc, void *arg)
+{
+ struct ifbrparam *param = arg;
+
+ param->ifbrp_cexceeded = sc->sc_brtexceeded;
+ return (0);
+}
+
+#define BRIDGE_IOCTL_GIFSSTP do { \
+ struct bridge_iflist *bif; \
+ struct bstp_port *bp; \
+ struct ifbpstpreq bpreq; \
+ char *buf, *outbuf; \
+ unsigned int count, buflen, len; \
+ \
+ count = 0; \
+ TAILQ_FOREACH(bif, &sc->sc_iflist, bif_next) { \
+ if ((bif->bif_flags & IFBIF_STP) != 0) \
+ count++; \
+ } \
+ \
+ buflen = sizeof(bpreq) * count; \
+ if (bifstp->ifbpstp_len == 0) { \
+ bifstp->ifbpstp_len = buflen; \
+ return (0); \
+ } \
+ \
+ BRIDGE_UNLOCK(sc); \
+ outbuf = _MALLOC(buflen, M_TEMP, M_WAITOK | M_ZERO); \
+ BRIDGE_LOCK(sc); \
+ \
+ count = 0; \
+ buf = outbuf; \
+ len = min(bifstp->ifbpstp_len, buflen); \
+ bzero(&bpreq, sizeof(bpreq)); \
+ TAILQ_FOREACH(bif, &sc->sc_iflist, bif_next) { \
+ if (len < sizeof(bpreq)) \
+ break; \
+ \
+ if ((bif->bif_flags & IFBIF_STP) == 0) \
+ continue; \
+ \
+ bp = &bif->bif_stp; \
+ bpreq.ifbp_portno = bif->bif_ifp->if_index & 0xfff; \
+ bpreq.ifbp_fwd_trans = bp->bp_forward_transitions; \
+ bpreq.ifbp_design_cost = bp->bp_desg_pv.pv_cost; \
+ bpreq.ifbp_design_port = bp->bp_desg_pv.pv_port_id; \
+ bpreq.ifbp_design_bridge = bp->bp_desg_pv.pv_dbridge_id; \
+ bpreq.ifbp_design_root = bp->bp_desg_pv.pv_root_id; \
+ \
+ memcpy(buf, &bpreq, sizeof(bpreq)); \
+ count++; \
+ buf += sizeof(bpreq); \
+ len -= sizeof(bpreq); \
+ } \
+ \
+ BRIDGE_UNLOCK(sc); \
+ bifstp->ifbpstp_len = sizeof(bpreq) * count; \
+ error = copyout(outbuf, bifstp->ifbpstp_req, bifstp->ifbpstp_len); \
+ BRIDGE_LOCK(sc); \
+ _FREE(outbuf, M_TEMP); \
+ return (error); \
+} while (0)
+
+static int
+bridge_ioctl_gifsstp32(struct bridge_softc *sc, void *arg)
+{
+ struct ifbpstpconf32 *bifstp = arg;
+ int error = 0;
+
+ BRIDGE_IOCTL_GIFSSTP;
+
+ return (error);
+}
+
+static int
+bridge_ioctl_gifsstp64(struct bridge_softc *sc, void *arg)
+{
+ struct ifbpstpconf64 *bifstp = arg;
+ int error = 0;
+
+ BRIDGE_IOCTL_GIFSSTP;
+
+ return (error);
+}
+
+static int
+bridge_ioctl_sproto(struct bridge_softc *sc, void *arg)
+{
+ struct ifbrparam *param = arg;
+
+ return (bstp_set_protocol(&sc->sc_stp, param->ifbrp_proto));
+}
+
+static int
+bridge_ioctl_stxhc(struct bridge_softc *sc, void *arg)
+{
+ struct ifbrparam *param = arg;
+
+ return (bstp_set_holdcount(&sc->sc_stp, param->ifbrp_txhc));
+}
+
+/*
+ * bridge_ifdetach:
+ *
+ * Detach an interface from a bridge. Called when a member
+ * interface is detaching.
+ */
+__private_extern__ void
+bridge_ifdetach(struct bridge_iflist *bif, struct ifnet *ifp)
+{
+ struct bridge_softc *sc = ifp->if_bridge;
+
+#if BRIDGE_DEBUG
+ printf("bridge_ifdetach %s%d\n", ifnet_name(ifp), ifnet_unit(ifp));
+#endif
+
+ /* Check if the interface is a bridge member */
+ if (sc != NULL) {
+ BRIDGE_LOCK(sc);
+
+ bif = bridge_lookup_member_if(sc, ifp);
+ if (bif != NULL)
+ bridge_delete_member(sc, bif, 1);
+
+ BRIDGE_UNLOCK(sc);
+ return;
+ }
+
+ /* Check if the interface is a span port */
+ lck_mtx_lock(bridge_list_mtx);
+ LIST_FOREACH(sc, &bridge_list, sc_list) {
+ BRIDGE_LOCK(sc);
+ TAILQ_FOREACH(bif, &sc->sc_spanlist, bif_next)
+ if (ifp == bif->bif_ifp) {
+ bridge_delete_span(sc, bif);
+ break;
+ }
+
+ BRIDGE_UNLOCK(sc);
+ }
+ lck_mtx_unlock(bridge_list_mtx);
+}
+
+/*
+ * bridge_init:
+ *
+ * Initialize a bridge interface.
+ */
+static int
+bridge_init(struct ifnet *ifp)
+{
+ struct bridge_softc *sc = (struct bridge_softc *)ifp->if_softc;
+ struct timespec ts;
+ errno_t error;
+
+ BRIDGE_LOCK_ASSERT(sc);
+
+ if ((ifnet_flags(ifp) & IFF_RUNNING))
+ return 0;
+
+ ts.tv_sec = bridge_rtable_prune_period;
+ ts.tv_nsec = 0;
+ bsd_timeout(bridge_timer, sc, &ts);
+
+ error = ifnet_set_flags(ifp, IFF_RUNNING, IFF_RUNNING);
+ if (error == 0)
+ bstp_init(&sc->sc_stp); /* Initialize Spanning Tree */
+
+ return error;
+}
+
+/*
+ * bridge_stop:
+ *
+ * Stop the bridge interface.
+ */
+static void
+bridge_stop(struct ifnet *ifp, __unused int disable)
+{
+ struct bridge_softc *sc = ifp->if_softc;
+
+ BRIDGE_LOCK_ASSERT(sc);
+
+ if ((ifnet_flags(ifp) & IFF_RUNNING) == 0)
+ return;
+
+ bsd_untimeout(bridge_timer, sc);
+ bstp_stop(&sc->sc_stp);
+
+ bridge_rtflush(sc, IFBF_FLUSHDYN);
+
+ (void) ifnet_set_flags(ifp, 0, IFF_RUNNING);
+}
+
+/*
+ * bridge_enqueue:
+ *
+ * Enqueue a packet on a bridge member interface.
+ *
+ */
+static void
+bridge_enqueue(struct bridge_softc *sc, struct ifnet *dst_ifp, struct mbuf *m)
+{
+ int len, error = 0;
+ short mflags;
+ struct mbuf *m0;
+
+ /* We may be sending a fragment so traverse the mbuf */
+ for (; m; m = m0) {
+ m0 = m->m_nextpkt;
+ m->m_nextpkt = NULL;
+
+ len = m->m_pkthdr.len;
+ mflags = m->m_flags;
+ m->m_flags |= M_PROTO1; //set to avoid loops
+
+#if HAS_IF_CAP
+ /*
+ * If underlying interface can not do VLAN tag insertion itself
+ * then attach a packet tag that holds it.
+ */
+ if ((m->m_flags & M_VLANTAG) &&
+ (dst_ifp->if_capenable & IFCAP_VLAN_HWTAGGING) == 0) {
+ m = ether_vlanencap(m, m->m_pkthdr.ether_vtag);
+ if (m == NULL) {
+ printf("%s%d: unable to prepend VLAN header\n",
+ ifnet_name(dst_ifp), ifnet_unit(dst_ifp));
+ (void) ifnet_stat_increment_out(dst_ifp, 0, 0, 1);
+ continue;
+ }
+ m->m_flags &= ~M_VLANTAG;
+ }
+#endif /* HAS_IF_CAP */
+
+ error = ifnet_output_raw(dst_ifp, 0, m);
+ if (error == 0) {
+ (void) ifnet_stat_increment_out(sc->sc_ifp, 1, len, 0);
+ } else {
+ (void) ifnet_stat_increment_out(sc->sc_ifp, 0, 0, 1);
+ }
+ }
+
+ return;
+}
+
+#if HAS_BRIDGE_DUMMYNET
+/*
+ * bridge_dummynet:
+ *
+ * Receive a queued packet from dummynet and pass it on to the output
+ * interface.
+ *
+ * The mbuf has the Ethernet header already attached.
+ */
+static void
+bridge_dummynet(struct mbuf *m, struct ifnet *ifp)
+{
+ struct bridge_softc *sc;
+
+ sc = ifp->if_bridge;
+
+ /*
+ * The packet didnt originate from a member interface. This should only
+ * ever happen if a member interface is removed while packets are
+ * queued for it.
+ */
+ if (sc == NULL) {
+ m_freem(m);
+ return;
+ }
+
+ if (PFIL_HOOKED(&inet_pfil_hook)
+#ifdef INET6
+ || PFIL_HOOKED(&inet6_pfil_hook)
+#endif
+ ) {
+ if (bridge_pfil(&m, sc->sc_ifp, ifp, PFIL_OUT) != 0)
+ return;
+ if (m == NULL)
+ return;
+ }
+
+ bridge_enqueue(sc, ifp, m);
+}
+#endif /* HAS_BRIDGE_DUMMYNET */
+
+#if BRIDGE_MEMBER_OUT_FILTER
+/*
+ * bridge_output:
+ *
+ * Send output from a bridge member interface. This
+ * performs the bridging function for locally originated
+ * packets.
+ *
+ * The mbuf has the Ethernet header already attached. We must
+ * enqueue or free the mbuf before returning.
+ */
+static int
+bridge_output(struct ifnet *ifp, struct mbuf *m, __unused struct sockaddr *sa,
+ __unused struct rtentry *rt)
+{
+ struct ether_header *eh;
+ struct ifnet *dst_if;
+ struct bridge_softc *sc;
+ uint16_t vlan;
+
+#if BRIDGE_DEBUG
+ if (_if_brige_debug)
+ printf("bridge_output ifp %p %s%d\n", ifp, ifnet_name(ifp), ifnet_unit(ifp));
+#endif /* BRIDGE_DEBUG */
+
+ if (m->m_len < ETHER_HDR_LEN) {
+ m = m_pullup(m, ETHER_HDR_LEN);
+ if (m == NULL)
+ return (0);
+ }
+
+ eh = mtod(m, struct ether_header *);
+ sc = ifp->if_bridge;
+ vlan = VLANTAGOF(m);
+
+ BRIDGE_LOCK(sc);
+
+ /* APPLE MODIFICATION
+ * If the packet is an 802.1X ethertype, then only send on the
+ * original output interface.
+ */
+ if (eh->ether_type == htons(ETHERTYPE_PAE)) {
+ dst_if = ifp;
+ goto sendunicast;
+ }
+
+ /*
+ * If bridge is down, but the original output interface is up,
+ * go ahead and send out that interface. Otherwise, the packet
+ * is dropped below.
+ */
+ if ((sc->sc_ifp->if_flags & IFF_RUNNING) == 0) {
+ dst_if = ifp;
+ goto sendunicast;
+ }
+
+ /*
+ * If the packet is a multicast, or we don't know a better way to
+ * get there, send to all interfaces.
+ */
+ if (ETHER_IS_MULTICAST(eh->ether_dhost))
+ dst_if = NULL;
+ else
+ dst_if = bridge_rtlookup(sc, eh->ether_dhost, vlan);
+ if (dst_if == NULL) {
+ struct bridge_iflist *bif;
+ struct mbuf *mc;
+ int error = 0, used = 0;
+
+ bridge_span(sc, m);
+
+ BRIDGE_LOCK2REF(sc, error);
+ if (error) {
+ m_freem(m);
+ return (0);
+ }
+
+ TAILQ_FOREACH(bif, &sc->sc_iflist, bif_next) {
+ dst_if = bif->bif_ifp;
+
+ if (dst_if->if_type == IFT_GIF)
+ continue;
+ if ((dst_if->if_flags & IFF_RUNNING) == 0)
+ continue;
+
+ /*
+ * If this is not the original output interface,
+ * and the interface is participating in spanning
+ * tree, make sure the port is in a state that
+ * allows forwarding.
+ */
+ if (dst_if != ifp && (bif->bif_flags & IFBIF_STP) &&
+ bif->bif_stp.bp_state == BSTP_IFSTATE_DISCARDING)
+ continue;
+
+ if (LIST_NEXT(bif, bif_next) == NULL) {
+ used = 1;
+ mc = m;
+ } else {
+ mc = m_copypacket(m, M_DONTWAIT);
+ if (mc == NULL) {
+ (void) ifnet_stat_increment_out(sc->sc_ifp, 0, 0, 1);
+ continue;
+ }
+ }
+
+ bridge_enqueue(sc, dst_if, mc);
+ }
+ if (used == 0)
+ m_freem(m);
+ BRIDGE_UNREF(sc);
+ return (0);
+ }
+
+sendunicast:
+ /*
+ * XXX Spanning tree consideration here?
+ */
+
+ bridge_span(sc, m);
+ if ((dst_if->if_flags & IFF_RUNNING) == 0) {
+ m_freem(m);
+ BRIDGE_UNLOCK(sc);
+ return (0);
+ }
+
+ BRIDGE_UNLOCK(sc);
+ bridge_enqueue(sc, dst_if, m);
+ return (0);
+}
+#endif /* BRIDGE_MEMBER_OUT_FILTER */
+
+#if APPLE_BRIDGE_HWCKSUM_SUPPORT
+static struct mbuf* bridge_fix_txcsum( struct mbuf *m )
+{
+ // basic tests indicate that the vast majority of packets being processed
+ // here have an Ethernet header mbuf pre-pended to them (the first case below)
+ // the second highest are those where the Ethernet and IP/TCP/UDP headers are
+ // all in one mbuf (second case below)
+ // the third case has, in fact, never hit for me -- although if I comment out
+ // the first two cases, that code works for them, so I consider it a
+ // decent general solution
+
+ int amt = ETHER_HDR_LEN;
+ int hlen = M_CSUM_DATA_IPv4_IPHL( m->m_pkthdr.csum_data );
+ int off = M_CSUM_DATA_IPv4_OFFSET( m->m_pkthdr.csum_data );
+
+ /*
+ * NOTE we should never get vlan-attached packets here;
+ * support for those COULD be added, but we don't use them
+ * and it really kinda slows things down to worry about them
+ */
+
+#ifdef DIAGNOSTIC
+ if ( m_tag_find( m, PACKET_TAG_VLAN, NULL ) != NULL )
+ {
+ printf( "bridge: transmitting packet tagged with VLAN?\n" );
+ KASSERT( 0 );
+ m_freem( m );
+ return NULL;
+ }
+#endif
+
+ if ( m->m_pkthdr.csum_flags & M_CSUM_IPv4 )
+ {
+ amt += hlen;
+ }
+ if ( m->m_pkthdr.csum_flags & M_CSUM_TCPv4 )
+ {
+ amt += off + sizeof( uint16_t );
+ }
+
+ if ( m->m_pkthdr.csum_flags & M_CSUM_UDPv4 )
+ {
+ amt += off + sizeof( uint16_t );
+ }
+
+ if ( m->m_len == ETHER_HDR_LEN )
+ {
+ // this is the case where there's an Ethernet header in an mbuf
+
+ // the first mbuf is the Ethernet header -- just strip it off and do the checksum
+ struct mbuf *m_ip = m->m_next;
+
+ // set up m_ip so the cksum operations work
+ /* APPLE MODIFICATION 22 Apr 2008 <mvega@apple.com>
+ * <rdar://5817385> Clear the m_tag list before setting
+ * M_PKTHDR.
+ *
+ * If this m_buf chain was extended via M_PREPEND(), then
+ * m_ip->m_pkthdr is identical to m->m_pkthdr (see
+ * M_MOVE_PKTHDR()). The only thing preventing access to this
+ * invalid packet header data is the fact that the M_PKTHDR
+ * flag is clear, i.e., m_ip->m_flag & M_PKTHDR == 0, but we're
+ * about to set the M_PKTHDR flag, so to be safe we initialize,
+ * more accurately, we clear, m_ip->m_pkthdr.tags via
+ * m_tag_init().
+ *
+ * Suppose that we do not do this; if m_pullup(), below, fails,
+ * then m_ip will be freed along with m_ip->m_pkthdr.tags, but
+ * we will also free m soon after, via m_freem(), and
+ * consequently attempt to free m->m_pkthdr.tags in the
+ * process. The problem is that m->m_pkthdr.tags will have
+ * already been freed by virtue of being equal to
+ * m_ip->m_pkthdr.tags. Attempts to dereference
+ * m->m_pkthdr.tags in m_tag_delete_chain() will result in a
+ * panic.
+ */
+ m_tag_init(m_ip);
+ /* END MODIFICATION */
+ m_ip->m_flags |= M_PKTHDR;
+ m_ip->m_pkthdr.csum_flags = m->m_pkthdr.csum_flags;
+ m_ip->m_pkthdr.csum_data = m->m_pkthdr.csum_data;
+ m_ip->m_pkthdr.len = m->m_pkthdr.len - ETHER_HDR_LEN;
+
+ // set up the header mbuf so we can prepend it back on again later
+ m->m_pkthdr.csum_flags = 0;
+ m->m_pkthdr.csum_data = 0;
+ m->m_pkthdr.len = ETHER_HDR_LEN;
+ m->m_next = NULL;
+
+
+ // now do the checksums we need -- first IP
+ if ( m_ip->m_pkthdr.csum_flags & M_CSUM_IPv4 )
+ {
+ // make sure the IP header (or at least the part with the cksum) is there
+ m_ip = m_pullup( m_ip, sizeof( struct ip ) );
+ if ( m_ip == NULL )
+ {
+ printf( "bridge: failed to flatten header\n ");
+ m_freem( m );
+ return NULL;
+ }
+
+ // now do the checksum
+ {
+ struct ip *ip = mtod( m_ip, struct ip* );
+ ip->ip_sum = in_cksum( m_ip, hlen );
+
+#ifdef VERY_VERY_VERY_DIAGNOSTIC
+ printf( "bridge: performed IPv4 checksum\n" );
+#endif
+ }
+ }
+
+ // now do a TCP or UDP delayed checksum
+ if ( m_ip->m_pkthdr.csum_flags & (M_CSUM_TCPv4|M_CSUM_UDPv4) )
+ {
+ in_delayed_cksum( m_ip );
+
+#ifdef VERY_VERY_VERY_DIAGNOSTIC
+ printf( "bridge: performed TCPv4/UDPv4 checksum\n" );
+#endif
+ }
+
+ // now attach the ethernet header back onto the IP packet
+ m->m_next = m_ip;
+ m->m_pkthdr.len += m_length( m_ip );
+
+ // clear the M_PKTHDR flags on the ip packet (again, we re-attach later)
+ m_ip->m_flags &= ~M_PKTHDR;
+
+ // and clear any csum flags
+ m->m_pkthdr.csum_flags &= ~(M_CSUM_TCPv4|M_CSUM_UDPv4|M_CSUM_IPv4);
+ }
+ else if ( m->m_len >= amt )
+ {
+ // everything fits in the first mbuf, so futz with m->m_data, m->m_len and m->m_pkthdr.len to
+ // make it work
+ m->m_len -= ETHER_HDR_LEN;
+ m->m_data += ETHER_HDR_LEN;
+ m->m_pkthdr.len -= ETHER_HDR_LEN;
+
+ // now do the checksums we need -- first IP
+ if ( m->m_pkthdr.csum_flags & M_CSUM_IPv4 )
+ {
+ struct ip *ip = mtod( m, struct ip* );
+ ip->ip_sum = in_cksum( m, hlen );
+
+#ifdef VERY_VERY_VERY_DIAGNOSTIC
+ printf( "bridge: performed IPv4 checksum\n" );
+#endif
+ }
+
+ // now do a TCP or UDP delayed checksum
+ if ( m->m_pkthdr.csum_flags & (M_CSUM_TCPv4|M_CSUM_UDPv4) )
+ {
+ in_delayed_cksum( m );
+
+#ifdef VERY_VERY_VERY_DIAGNOSTIC
+ printf( "bridge: performed TCPv4/UDPv4 checksum\n" );
+#endif
+ }
+
+ // now stick the ethernet header back on
+ m->m_len += ETHER_HDR_LEN;
+ m->m_data -= ETHER_HDR_LEN;
+ m->m_pkthdr.len += ETHER_HDR_LEN;
+
+ // and clear any csum flags
+ m->m_pkthdr.csum_flags &= ~(M_CSUM_TCPv4|M_CSUM_UDPv4|M_CSUM_IPv4);
+ }
+ else
+ {
+ struct mbuf *m_ip;
+
+ // general case -- need to simply split it off and deal
+
+ // first, calculate how much needs to be made writable (we may have a read-only mbuf here)
+ hlen = M_CSUM_DATA_IPv4_IPHL( m->m_pkthdr.csum_data );
+#if PARANOID
+ off = M_CSUM_DATA_IPv4_OFFSET( m->m_pkthdr.csum_data );
+
+ if ( m->m_pkthdr.csum_flags & M_CSUM_IPv4 )
+ {
+ amt += hlen;
+ }
+
+ if ( m->m_pkthdr.csum_flags & M_CSUM_TCPv4 )
+ {
+ amt += sizeof( struct tcphdr * );
+ amt += off;
+ }
+
+ if ( m->m_pkthdr.csum_flags & M_CSUM_UDPv4 )
+ {
+ amt += sizeof( struct udphdr * );
+ amt += off;
+ }
+#endif
+
+ // now split the ethernet header off of the IP packet (we'll re-attach later)
+ m_ip = m_split( m, ETHER_HDR_LEN, M_NOWAIT );
+ if ( m_ip == NULL )
+ {
+ printf( "bridge_fix_txcsum: could not split ether header\n" );
+
+ m_freem( m );
+ return NULL;
+ }
+
+#if PARANOID
+ // make sure that the IP packet is writable for the portion we need
+ if ( m_makewritable( &m_ip, 0, amt, M_DONTWAIT ) != 0 )
+ {
+ printf( "bridge_fix_txcsum: could not make %d bytes writable\n", amt );
+
+ m_freem( m );
+ m_freem( m_ip );
+ return NULL;
+ }
+#endif
+
+ m_ip->m_pkthdr.csum_flags = m->m_pkthdr.csum_flags;
+ m_ip->m_pkthdr.csum_data = m->m_pkthdr.csum_data;
+
+ m->m_pkthdr.csum_flags = 0;
+ m->m_pkthdr.csum_data = 0;
+
+ // now do the checksums we need -- first IP
+ if ( m_ip->m_pkthdr.csum_flags & M_CSUM_IPv4 )
+ {
+ // make sure the IP header (or at least the part with the cksum) is there
+ m_ip = m_pullup( m_ip, sizeof( struct ip ) );
+ if ( m_ip == NULL )
+ {
+ printf( "bridge: failed to flatten header\n ");
+ m_freem( m );
+ return NULL;
+ }
+
+ // now do the checksum
+ {
+ struct ip *ip = mtod( m_ip, struct ip* );
+ ip->ip_sum = in_cksum( m_ip, hlen );
+
+#ifdef VERY_VERY_VERY_DIAGNOSTIC
+ printf( "bridge: performed IPv4 checksum\n" );
+#endif
+ }
+ }
+
+ // now do a TCP or UDP delayed checksum
+ if ( m_ip->m_pkthdr.csum_flags & (M_CSUM_TCPv4|M_CSUM_UDPv4) )
+ {
+ in_delayed_cksum( m_ip );
+
+#ifdef VERY_VERY_VERY_DIAGNOSTIC
+ printf( "bridge: performed TCPv4/UDPv4 checksum\n" );
+#endif
+ }
+
+ // now attach the ethernet header back onto the IP packet
+ m->m_next = m_ip;
+ m->m_pkthdr.len += m_length( m_ip );
+
+ // clear the M_PKTHDR flags on the ip packet (again, we re-attach later)
+ m_ip->m_flags &= ~M_PKTHDR;
+
+ // and clear any csum flags
+ m->m_pkthdr.csum_flags &= ~(M_CSUM_TCPv4|M_CSUM_UDPv4|M_CSUM_IPv4);
+ }
+
+ return m;
+}
+#endif
+
+/*
+ * bridge_start:
+ *
+ * Start output on a bridge.
+ *
+ */
+static errno_t
+bridge_start(struct ifnet *ifp, struct mbuf *m)
+{
+ struct bridge_softc *sc = ifnet_softc(ifp);
+ struct ether_header *eh;
+ struct ifnet *dst_if;
+
+ lck_mtx_assert(sc->sc_mtx, LCK_MTX_ASSERT_NOTOWNED);
+
+ eh = mtod(m, struct ether_header *);
+
+ BRIDGE_LOCK(sc);
+
+ if ((m->m_flags & (M_BCAST|M_MCAST)) == 0 &&
+ (dst_if = bridge_rtlookup(sc, eh->ether_dhost, 0)) != NULL) {
+
+ {
+#if APPLE_BRIDGE_HWCKSUM_SUPPORT
+ /*
+ * APPLE MODIFICATION - if the packet needs a checksum (i.e.,
+ * checksum has been deferred for HW support) AND the destination
+ * interface doesn't support HW checksums, then we
+ * need to fix-up the checksum here
+ */
+ if (
+ ( (m->m_pkthdr.csum_flags & (M_CSUM_TCPv4|M_CSUM_UDPv4|M_CSUM_IPv4) ) != 0 ) &&
+ ( (dst_if->if_csum_flags_tx & m->m_pkthdr.csum_flags ) != m->m_pkthdr.csum_flags )
+ )
+ {
+ m = bridge_fix_txcsum( m );
+ if ( m == NULL )
+ {
+ goto done;
+ }
+ }
+
+#else
+ if (eh->ether_type == htons(ETHERTYPE_IP))
+ mbuf_outbound_finalize(m, PF_INET, sizeof(struct ether_header));
+ else
+ m->m_pkthdr.csum_flags = 0;
+#endif
+ #if NBPFILTER > 0
+ if (sc->sc_bpf_output)
+ bridge_bpf_output(ifp, m);
+ #endif
+ BRIDGE_UNLOCK(sc);
+ bridge_enqueue(sc, dst_if, m);
+ }
+ } else
+ {
+#if APPLE_BRIDGE_HWCKSUM_SUPPORT
+
+ /*
+ * APPLE MODIFICATION - if the MULTICAST packet needs a checksum (i.e.,
+ * checksum has been deferred for HW support) AND at least one destination
+ * interface doesn't support HW checksums, then we go ahead and fix it up
+ * here, since it doesn't make sense to do it more than once
+ */
+
+ if (
+ (m->m_pkthdr.csum_flags & (M_CSUM_TCPv4|M_CSUM_UDPv4|M_CSUM_IPv4)) &&
+ /*
+ * XXX FIX ME: keep track of whether or not we have any interfaces that
+ * do not support checksums (for now, assume we do)
+ */
+ ( 1 )
+ )
+ {
+ m = bridge_fix_txcsum( m );
+ if ( m == NULL )
+ {
+ goto done;
+ }
+ }
+#else
+ if (eh->ether_type == htons(ETHERTYPE_IP))
+ mbuf_outbound_finalize(m, PF_INET, sizeof(struct ether_header));
+ else
+ m->m_pkthdr.csum_flags = 0;
+#endif
+
+ #if NBPFILTER > 0
+ if (sc->sc_bpf_output)
+ bridge_bpf_output(ifp, m);
+ #endif
+ bridge_broadcast(sc, ifp, m, 0);
+ }
+#if APPLE_BRIDGE_HWCKSUM_SUPPORT
+done:
+#endif
+
+ return 0;
+}
+
+/*
+ * bridge_forward:
+ *
+ * The forwarding function of the bridge.
+ *
+ * NOTE: Releases the lock on return.
+ */
+static void
+bridge_forward(struct bridge_softc *sc, struct bridge_iflist *sbif,
+ struct mbuf *m)
+{
+ struct bridge_iflist *dbif;
+ struct ifnet *src_if, *dst_if, *ifp;
+ struct ether_header *eh;
+ uint16_t vlan;
+ uint8_t *dst;
+ int error;
+
+ lck_mtx_assert(sc->sc_mtx, LCK_MTX_ASSERT_OWNED);
+
+#if BRIDGE_DEBUG
+ if (_if_brige_debug)
+ printf("bridge_forward %s%d m%p\n", ifnet_name(sc->sc_ifp), ifnet_unit(sc->sc_ifp), m);
+#endif /* BRIDGE_DEBUG */
+
+ src_if = m->m_pkthdr.rcvif;
+ ifp = sc->sc_ifp;
+
+ (void) ifnet_stat_increment_in(ifp, 1, m->m_pkthdr.len, 0);
+ vlan = VLANTAGOF(m);
+
+
+ if ((sbif->bif_flags & IFBIF_STP) &&
+ sbif->bif_stp.bp_state == BSTP_IFSTATE_DISCARDING)
+ goto drop;
+
+ eh = mtod(m, struct ether_header *);
+ dst = eh->ether_dhost;
+
+ /* If the interface is learning, record the address. */
+ if (sbif->bif_flags & IFBIF_LEARNING) {
+ error = bridge_rtupdate(sc, eh->ether_shost, vlan,
+ sbif, 0, IFBAF_DYNAMIC);
+ /*
+ * If the interface has addresses limits then deny any source
+ * that is not in the cache.
+ */
+ if (error && sbif->bif_addrmax)
+ goto drop;
+ }
+
+ if ((sbif->bif_flags & IFBIF_STP) != 0 &&
+ sbif->bif_stp.bp_state == BSTP_IFSTATE_LEARNING)
+ goto drop;
+
+ /*
+ * At this point, the port either doesn't participate
+ * in spanning tree or it is in the forwarding state.
+ */
+
+ /*
+ * If the packet is unicast, destined for someone on
+ * "this" side of the bridge, drop it.
+ */
+ if ((m->m_flags & (M_BCAST|M_MCAST)) == 0) {
+ dst_if = bridge_rtlookup(sc, dst, vlan);
+ if (src_if == dst_if)
+ goto drop;
+ } else {
+ /*
+ * Check if its a reserved multicast address, any address
+ * listed in 802.1D section 7.12.6 may not be forwarded by the
+ * bridge.
+ * This is currently 01-80-C2-00-00-00 to 01-80-C2-00-00-0F
+ */
+ if (dst[0] == 0x01 && dst[1] == 0x80 &&
+ dst[2] == 0xc2 && dst[3] == 0x00 &&
+ dst[4] == 0x00 && dst[5] <= 0x0f)
+ goto drop;
+
+
+ /* ...forward it to all interfaces. */
+ atomic_add_64(&ifp->if_imcasts, 1);
+ dst_if = NULL;
+ }
+
+ /*
+ * If we have a destination interface which is a member of our bridge,
+ * OR this is a unicast packet, push it through the bpf(4) machinery.
+ * For broadcast or multicast packets, don't bother because it will
+ * be reinjected into ether_input. We do this before we pass the packets
+ * through the pfil(9) framework, as it is possible that pfil(9) will
+ * drop the packet, or possibly modify it, making it difficult to debug
+ * firewall issues on the bridge.
+ */
+#if NBPFILTER > 0
+ if (eh->ether_type == htons(ETHERTYPE_RSN_PREAUTH) ||
+ dst_if != NULL || (m->m_flags & (M_BCAST | M_MCAST)) == 0) {
+ m->m_pkthdr.rcvif = ifp;
+ if (sc->sc_bpf_input)
+ bridge_bpf_input(ifp, m);
+ }
+#endif /* NBPFILTER */
+
+#if defined(PFIL_HOOKS)
+ /* run the packet filter */
+ if (PFIL_HOOKED(&inet_pfil_hook)
+#ifdef INET6
+ || PFIL_HOOKED(&inet6_pfil_hook)
+#endif /* INET6 */
+ ) {
+ BRIDGE_UNLOCK(sc);
+ if (bridge_pfil(&m, ifp, src_if, PFIL_IN) != 0)
+ return;
+ if (m == NULL)
+ return;
+ BRIDGE_LOCK(sc);
+ }
+#endif /* PFIL_HOOKS */
+
+ if (dst_if == NULL) {
+ /*
+ * Clear any in-bound checksum flags for this packet.
+ */
+ mbuf_inbound_modified(m);
+
+ bridge_broadcast(sc, src_if, m, 1);
+
+ return;
+ }
+
+ /*
+ * At this point, we're dealing with a unicast frame
+ * going to a different interface.
+ */
+ if ((dst_if->if_flags & IFF_RUNNING) == 0)
+ goto drop;
+
+ dbif = bridge_lookup_member_if(sc, dst_if);
+ if (dbif == NULL)
+ /* Not a member of the bridge (anymore?) */
+ goto drop;
+
+ /* Private segments can not talk to each other */
+ if (sbif->bif_flags & dbif->bif_flags & IFBIF_PRIVATE)
+ goto drop;
+
+ if ((dbif->bif_flags & IFBIF_STP) &&
+ dbif->bif_stp.bp_state == BSTP_IFSTATE_DISCARDING)
+ goto drop;
+
+#if HAS_DHCPRA_MASK
+ /* APPLE MODIFICATION <rdar://6985737> */
+ if ((dst_if->if_extflags & IFEXTF_DHCPRA_MASK) != 0) {
+ m = ip_xdhcpra_output(dst_if, m);
+ if (!m) {
+ ++sc->sc_sc.sc_ifp.if_xdhcpra;
+ return;
+ }
+ }
+#endif /* HAS_DHCPRA_MASK */
+
+ BRIDGE_UNLOCK(sc);
+
+#if defined(PFIL_HOOKS)
+ if (PFIL_HOOKED(&inet_pfil_hook)
+#ifdef INET6
+ || PFIL_HOOKED(&inet6_pfil_hook)
+#endif
+ ) {
+ if (bridge_pfil(&m, ifp, dst_if, PFIL_OUT) != 0)
+ return;
+ if (m == NULL)
+ return;
+ }
+#endif /* PFIL_HOOKS */
+
+ /*
+ * Clear any in-bound checksum flags for this packet.
+ */
+ mbuf_inbound_modified(m);
+
+ bridge_enqueue(sc, dst_if, m);
+ return;
+
+drop:
+ BRIDGE_UNLOCK(sc);
+ m_freem(m);
+}
+
+#if BRIDGE_DEBUG
+
+char * ether_ntop(char *, size_t , const u_char *);
+
+__private_extern__ char *
+ether_ntop(char *buf, size_t len, const u_char *ap)
+{
+ snprintf(buf, len, "%02x:%02x:%02x:%02x:%02x:%02x",
+ ap[0], ap[1], ap[2], ap[3], ap[4], ap[5]);
+
+ return buf;
+}
+
+#endif /* BRIDGE_DEBUG */
+
+/*
+ * bridge_input:
+ *
+ * Filter input from a member interface. Queue the packet for
+ * bridging if it is not for us.
+ */
+__private_extern__ errno_t
+bridge_input(struct ifnet *ifp, struct mbuf *m, __unused void *frame_header)
+{
+ struct bridge_softc *sc = ifp->if_bridge;
+ struct bridge_iflist *bif, *bif2;
+ struct ifnet *bifp;
+ struct ether_header *eh;
+ struct mbuf *mc, *mc2;
+ uint16_t vlan;
+ int error;
+
+#if BRIDGE_DEBUG
+ if (_if_brige_debug)
+ printf("bridge_input: %s%d from %s%d m %p data %p\n",
+ ifnet_name(sc->sc_ifp), ifnet_unit(sc->sc_ifp),
+ ifnet_name(ifp), ifnet_unit(ifp),
+ m, mbuf_data(m));
+#endif /* BRIDGE_DEBUG */
+
+ if ((sc->sc_ifp->if_flags & IFF_RUNNING) == 0) {
+#if BRIDGE_DEBUG
+ if (_if_brige_debug)
+ printf( "bridge_input: %s%d not running passing along\n",
+ ifnet_name(sc->sc_ifp), ifnet_unit(sc->sc_ifp));
+#endif /* BRIDGE_DEBUG */
+ return 0;
+ }
+
+ bifp = sc->sc_ifp;
+ vlan = VLANTAGOF(m);
+
+#ifdef IFF_MONITOR
+ /*
+ * Implement support for bridge monitoring. If this flag has been
+ * set on this interface, discard the packet once we push it through
+ * the bpf(4) machinery, but before we do, increment the byte and
+ * packet counters associated with this interface.
+ */
+ if ((bifp->if_flags & IFF_MONITOR) != 0) {
+ m->m_pkthdr.rcvif = bifp;
+ BRIDGE_BPF_MTAP_INPUT(sc, m);
+ (void) ifnet_stat_increment_in(bifp, 1, m->m_pkthdr.len, 0);
+ m_freem(m);
+ return EJUSTRETURN;
+ }
+#endif /* IFF_MONITOR */
+
+ /*
+ * Need to clear the promiscous flags otherwise it will be
+ * dropped by DLIL after processing filters
+ */
+ if ((mbuf_flags(m) & MBUF_PROMISC))
+ mbuf_setflags_mask(m, 0, MBUF_PROMISC);
+
+ BRIDGE_LOCK(sc);
+ bif = bridge_lookup_member_if(sc, ifp);
+ if (bif == NULL) {
+ BRIDGE_UNLOCK(sc);
+#if BRIDGE_DEBUG
+ if (_if_brige_debug)
+ printf( "bridge_input: %s%d bridge_lookup_member_if failed\n",
+ ifnet_name(sc->sc_ifp), ifnet_unit(sc->sc_ifp));
+#endif /* BRIDGE_DEBUG */
+ return 0;
+ }
+
+ eh = mtod(m, struct ether_header *);
+
+ bridge_span(sc, m);
+
+ if (m->m_flags & (M_BCAST|M_MCAST)) {
+
+#if BRIDGE_DEBUG
+ if (_if_brige_debug)
+ if ((m->m_flags & M_MCAST))
+ printf("mulicast: %02x:%02x:%02x:%02x:%02x:%02x\n",
+ eh->ether_dhost[0], eh->ether_dhost[1], eh->ether_dhost[2],
+ eh->ether_dhost[3], eh->ether_dhost[4], eh->ether_dhost[5]);
+
+#endif /* BRIDGE_DEBUG */
+
+ /* Tap off 802.1D packets; they do not get forwarded. */
+ if (memcmp(eh->ether_dhost, bstp_etheraddr,
+ ETHER_ADDR_LEN) == 0) {
+ m = bstp_input(&bif->bif_stp, ifp, m);
+ if (m == NULL) {
+ BRIDGE_UNLOCK(sc);
+ return EJUSTRETURN;
+ }
+ }
+
+ if ((bif->bif_flags & IFBIF_STP) &&
+ bif->bif_stp.bp_state == BSTP_IFSTATE_DISCARDING) {
+ BRIDGE_UNLOCK(sc);
+ return 0;
+ }
+
+ /*
+ * Make a deep copy of the packet and enqueue the copy
+ * for bridge processing; return the original packet for
+ * local processing.
+ */
+ mc = m_dup(m, M_DONTWAIT);
+ if (mc == NULL) {
+ BRIDGE_UNLOCK(sc);
+ return 0;
+ }
+
+ /*
+ * Perform the bridge forwarding function with the copy.
+ *
+ * Note that bridge_forward calls BRIDGE_UNLOCK
+ */
+ bridge_forward(sc, bif, mc);
+
+ /*
+ * Reinject the mbuf as arriving on the bridge so we have a
+ * chance at claiming multicast packets. We can not loop back
+ * here from ether_input as a bridge is never a member of a
+ * bridge.
+ */
+ KASSERT(bifp->if_bridge == NULL,
+ ("loop created in bridge_input"));
+ mc2 = m_dup(m, M_DONTWAIT);
+ if (mc2 != NULL) {
+ /* Keep the layer3 header aligned */
+ int i = min(mc2->m_pkthdr.len, max_protohdr);
+ mc2 = m_copyup(mc2, i, ETHER_ALIGN);
+ }
+ if (mc2 != NULL) {
+ // mark packet as arriving on the bridge
+ mc2->m_pkthdr.rcvif = bifp;
+ mc2->m_pkthdr.header = mbuf_data(mc2);
+
+#if NBPFILTER > 0
+ if (sc->sc_bpf_input)
+ bridge_bpf_input(bifp, mc2);
+#endif /* NBPFILTER */
+ (void) mbuf_setdata(mc2, (char *)mbuf_data(mc2) + ETHER_HDR_LEN, mbuf_len(mc2) - ETHER_HDR_LEN);
+ (void) mbuf_pkthdr_adjustlen(mc2, - ETHER_HDR_LEN);
+
+ (void) ifnet_stat_increment_in(bifp, 1, mbuf_pkthdr_len(mc2), 0);
+
+#if BRIDGE_DEBUG
+ if (_if_brige_debug)
+ printf( "bridge_input: %s%d mcast for us\n",
+ ifnet_name(sc->sc_ifp), ifnet_unit(sc->sc_ifp));
+#endif /* BRIDGE_DEBUG */
+
+ dlil_input_packet_list(bifp, mc2);
+ }
+
+ /* Return the original packet for local processing. */
+ return 0;
+ }
+
+ if ((bif->bif_flags & IFBIF_STP) &&
+ bif->bif_stp.bp_state == BSTP_IFSTATE_DISCARDING) {
+ BRIDGE_UNLOCK(sc);
+ return 0;
+ }
+
+#ifdef DEV_CARP
+# define OR_CARP_CHECK_WE_ARE_DST(iface) \
+ || ((iface)->if_carp \
+ && carp_forus((iface)->if_carp, eh->ether_dhost))
+# define OR_CARP_CHECK_WE_ARE_SRC(iface) \
+ || ((iface)->if_carp \
+ && carp_forus((iface)->if_carp, eh->ether_shost))
+#else
+# define OR_CARP_CHECK_WE_ARE_DST(iface)
+# define OR_CARP_CHECK_WE_ARE_SRC(iface)
+#endif
+
+#ifdef INET6
+# define OR_PFIL_HOOKED_INET6 \
+ || PFIL_HOOKED(&inet6_pfil_hook)
+#else
+# define OR_PFIL_HOOKED_INET6
+#endif
+
+#if defined(PFIL_HOOKS)
+#define PFIL_PHYS(sc, ifp, m) do { \
+ if (pfil_local_phys && \
+ (PFIL_HOOKED(&inet_pfil_hook) \
+ OR_PFIL_HOOKED_INET6)) { \
+ if (bridge_pfil(&m, NULL, ifp, \
+ PFIL_IN) != 0 || m == NULL) { \
+ BRIDGE_UNLOCK(sc); \
+ return (NULL); \
+ } \
+ } \
+ } while (0)
+#else /* PFIL_HOOKS */
+#define PFIL_PHYS(sc, ifp, m)
+#endif /* PFIL_HOOKS */
+
+#define GRAB_OUR_PACKETS(iface) \
+ if ((iface)->if_type == IFT_GIF) \
+ continue; \
+ /* It is destined for us. */ \
+ if (memcmp(ifnet_lladdr((iface)), eh->ether_dhost, ETHER_ADDR_LEN) == 0 \
+ OR_CARP_CHECK_WE_ARE_DST((iface)) \
+ ) { \
+ if ((iface)->if_type == IFT_BRIDGE) { \
+ BRIDGE_BPF_MTAP_INPUT(sc, m); \
+ /* Filter on the physical interface. */ \
+ PFIL_PHYS(sc, iface, m); \
+ } \
+ if (bif->bif_flags & IFBIF_LEARNING) { \
+ error = bridge_rtupdate(sc, eh->ether_shost, \
+ vlan, bif, 0, IFBAF_DYNAMIC); \
+ if (error && bif->bif_addrmax) { \
+ BRIDGE_UNLOCK(sc); \
+ return EJUSTRETURN; \
+ } \
+ } \
+ m->m_pkthdr.rcvif = iface; \
+ BRIDGE_UNLOCK(sc); \
+ return 0; \
+ } \
+ \
+ /* We just received a packet that we sent out. */ \
+ if (memcmp(ifnet_lladdr((iface)), eh->ether_shost, ETHER_ADDR_LEN) == 0 \
+ OR_CARP_CHECK_WE_ARE_SRC((iface)) \
+ ) { \
+ BRIDGE_UNLOCK(sc); \
+ return EJUSTRETURN; \
+ }
+
+ /*
+ * Unicast.
+ */
+ /*
+ * If the packet is for us, set the packets source as the
+ * bridge, and return the packet back to ether_input for
+ * local processing.
+ */
+ if (memcmp(eh->ether_dhost, ifnet_lladdr(bifp),
+ ETHER_ADDR_LEN) == 0
+ OR_CARP_CHECK_WE_ARE_DST(bifp)) {
+
+ /* Mark the packet as arriving on the bridge interface */
+ (void) mbuf_pkthdr_setrcvif(m, bifp);
+ mbuf_pkthdr_setheader(m, frame_header);
+
+ /*
+ * If the interface is learning, and the source
+ * address is valid and not multicast, record
+ * the address.
+ */
+ if ((bif->bif_flags & IFBIF_LEARNING) != 0 &&
+ ETHER_IS_MULTICAST(eh->ether_shost) == 0 &&
+ (eh->ether_shost[0] | eh->ether_shost[1] |
+ eh->ether_shost[2] | eh->ether_shost[3] |
+ eh->ether_shost[4] | eh->ether_shost[5]) != 0) {
+ (void) bridge_rtupdate(sc, eh->ether_shost,
+ vlan, bif, 0, IFBAF_DYNAMIC);
+ }
+
+ BRIDGE_BPF_MTAP_INPUT(sc, m);
+
+ (void) mbuf_setdata(m, (char *)mbuf_data(m) + ETHER_HDR_LEN, mbuf_len(m) - ETHER_HDR_LEN);
+ (void) mbuf_pkthdr_adjustlen(m, - ETHER_HDR_LEN);
+
+ (void) ifnet_stat_increment_in(bifp, 1, mbuf_pkthdr_len(m), 0);
+
+ BRIDGE_UNLOCK(sc);
+
+#if BRIDGE_DEBUG
+ if (_if_brige_debug)
+ printf( "bridge_input: %s%d packet for bridge\n",
+ ifnet_name(sc->sc_ifp), ifnet_unit(sc->sc_ifp));
+#endif /* BRIDGE_DEBUG */
+
+ dlil_input_packet_list(bifp, m);
+
+ return EJUSTRETURN;
+ }
+
+ /*
+ * if the destination of the packet is for the MAC address of
+ * the member interface itself, then we don't need to forward
+ * it -- just pass it back. Note that it'll likely just be
+ * dropped by the stack, but if something else is bound to
+ * the interface directly (for example, the wireless stats
+ * protocol -- although that actually uses BPF right now),
+ * then it will consume the packet
+ *
+ * ALSO, note that we do this check AFTER checking for the
+ * bridge's own MAC address, because the bridge may be
+ * using the SAME MAC address as one of its interfaces
+ */
+ if (memcmp(eh->ether_dhost, ifnet_lladdr(ifp),
+ ETHER_ADDR_LEN) == 0) {
+
+#ifdef VERY_VERY_VERY_DIAGNOSTIC
+ printf("bridge_input: not forwarding packet bound for member interface\n" );
+#endif
+ BRIDGE_UNLOCK(sc);
+ return 0;
+ }
+
+ /* Now check the all bridge members. */
+ TAILQ_FOREACH(bif2, &sc->sc_iflist, bif_next) {
+ GRAB_OUR_PACKETS(bif2->bif_ifp)
+ }
+
+#undef OR_CARP_CHECK_WE_ARE_DST
+#undef OR_CARP_CHECK_WE_ARE_SRC
+#undef OR_PFIL_HOOKED_INET6
+#undef GRAB_OUR_PACKETS
+
+ /*
+ * Perform the bridge forwarding function.
+ *
+ * Note that bridge_forward calls BRIDGE_UNLOCK
+ */
+ bridge_forward(sc, bif, m);
+
+ return EJUSTRETURN;
+}
+
+/*
+ * bridge_broadcast:
+ *
+ * Send a frame to all interfaces that are members of
+ * the bridge, except for the one on which the packet
+ * arrived.
+ *
+ * NOTE: Releases the lock on return.
+ */
+static void
+bridge_broadcast(struct bridge_softc *sc, struct ifnet *src_if,
+ struct mbuf *m, int runfilt)
+{
+#ifndef PFIL_HOOKS
+#pragma unused(runfilt)
+#endif
+ struct bridge_iflist *dbif, *sbif;
+ struct mbuf *mc;
+ struct ifnet *dst_if;
+ int error = 0, used = 0;
+
+ sbif = bridge_lookup_member_if(sc, src_if);
+
+ BRIDGE_LOCK2REF(sc, error);
+ if (error) {
+ m_freem(m);
+ return;
+ }
+
+#ifdef PFIL_HOOKS
+ /* Filter on the bridge interface before broadcasting */
+ if (runfilt && (PFIL_HOOKED(&inet_pfil_hook)
+#ifdef INET6
+ || PFIL_HOOKED(&inet6_pfil_hook)
+#endif /* INET6 */
+ )) {
+ if (bridge_pfil(&m, sc->sc_ifp, NULL, PFIL_OUT) != 0)
+ goto out;
+ if (m == NULL)
+ goto out;
+ }
+#endif /* PFIL_HOOKS */
+
+ TAILQ_FOREACH(dbif, &sc->sc_iflist, bif_next) {
+ dst_if = dbif->bif_ifp;
+ if (dst_if == src_if)
+ continue;
+
+ /* Private segments can not talk to each other */
+ if (sbif && (sbif->bif_flags & dbif->bif_flags & IFBIF_PRIVATE))
+ continue;
+
+ if ((dbif->bif_flags & IFBIF_STP) &&
+ dbif->bif_stp.bp_state == BSTP_IFSTATE_DISCARDING)
+ continue;
+
+ if ((dbif->bif_flags & IFBIF_DISCOVER) == 0 &&
+ (m->m_flags & (M_BCAST|M_MCAST)) == 0)
+ continue;
+
+ if ((dst_if->if_flags & IFF_RUNNING) == 0)
+ continue;
+
+ if (TAILQ_NEXT(dbif, bif_next) == NULL) {
+ mc = m;
+ used = 1;
+ } else {
+ mc = m_dup(m, M_DONTWAIT);
+ if (mc == NULL) {
+ (void) ifnet_stat_increment_out(sc->sc_ifp, 0, 0, 1);
+ continue;
+ }
+ }
+
+#ifdef PFIL_HOOKS
+ /*
+ * Filter on the output interface. Pass a NULL bridge interface
+ * pointer so we do not redundantly filter on the bridge for
+ * each interface we broadcast on.
+ */
+ if (runfilt && (PFIL_HOOKED(&inet_pfil_hook)
+#ifdef INET6
+ || PFIL_HOOKED(&inet6_pfil_hook)
+#endif
+ )) {
+ if (used == 0) {
+ /* Keep the layer3 header aligned */
+ int i = min(mc->m_pkthdr.len, max_protohdr);
+ mc = m_copyup(mc, i, ETHER_ALIGN);
+ if (mc == NULL) {
+ (void) ifnet_stat_increment_out(sc->sc_ifp, 0, 0, 1);
+ continue;
+ }
+ }
+ if (bridge_pfil(&mc, NULL, dst_if, PFIL_OUT) != 0)
+ continue;
+ if (mc == NULL)
+ continue;
+ }
+#endif /* PFIL_HOOKS */
+
+ bridge_enqueue(sc, dst_if, mc);
+ }
+ if (used == 0)
+ m_freem(m);
+
+#ifdef PFIL_HOOKS
+out:
+#endif /* PFIL_HOOKS */
+
+ BRIDGE_UNREF(sc);
+}
+
+/*
+ * bridge_span:
+ *
+ * Duplicate a packet out one or more interfaces that are in span mode,
+ * the original mbuf is unmodified.
+ */
+static void
+bridge_span(struct bridge_softc *sc, struct mbuf *m)
+{
+ struct bridge_iflist *bif;
+ struct ifnet *dst_if;
+ struct mbuf *mc;
+
+ if (TAILQ_EMPTY(&sc->sc_spanlist))
+ return;
+
+ TAILQ_FOREACH(bif, &sc->sc_spanlist, bif_next) {
+ dst_if = bif->bif_ifp;
+
+ if ((dst_if->if_flags & IFF_RUNNING) == 0)
+ continue;
+
+ mc = m_copypacket(m, M_DONTWAIT);
+ if (mc == NULL) {
+ (void) ifnet_stat_increment_out(sc->sc_ifp, 0, 0, 1);
+ continue;
+ }
+
+ bridge_enqueue(sc, dst_if, mc);
+ }
+}
+
+
+
+/*
+ * bridge_rtupdate:
+ *
+ * Add a bridge routing entry.
+ */
+static int
+bridge_rtupdate(struct bridge_softc *sc, const uint8_t *dst, uint16_t vlan,
+ struct bridge_iflist *bif, int setflags, uint8_t flags)
+{
+ struct bridge_rtnode *brt;
+ int error;
+
+ BRIDGE_LOCK_ASSERT(sc);
+
+ /* Check the source address is valid and not multicast. */
+ if (ETHER_IS_MULTICAST(dst) ||
+ (dst[0] == 0 && dst[1] == 0 && dst[2] == 0 &&
+ dst[3] == 0 && dst[4] == 0 && dst[5] == 0) != 0)
+ return (EINVAL);
+
+
+ /* 802.1p frames map to vlan 1 */
+ if (vlan == 0)
+ vlan = 1;
+
+ /*
+ * A route for this destination might already exist. If so,
+ * update it, otherwise create a new one.
+ */
+ if ((brt = bridge_rtnode_lookup(sc, dst, vlan)) == NULL) {
+ if (sc->sc_brtcnt >= sc->sc_brtmax) {
+ sc->sc_brtexceeded++;
+ return (ENOSPC);
+ }
+ /* Check per interface address limits (if enabled) */
+ if (bif->bif_addrmax && bif->bif_addrcnt >= bif->bif_addrmax) {
+ bif->bif_addrexceeded++;
+ return (ENOSPC);
+ }
+
+ /*
+ * Allocate a new bridge forwarding node, and
+ * initialize the expiration time and Ethernet
+ * address.
+ */
+ brt = zalloc_noblock(bridge_rtnode_pool);
+ if (brt == NULL)
+ return (ENOMEM);
+
+ if (bif->bif_flags & IFBIF_STICKY)
+ brt->brt_flags = IFBAF_STICKY;
+ else
+ brt->brt_flags = IFBAF_DYNAMIC;
+
+ memcpy(brt->brt_addr, dst, ETHER_ADDR_LEN);
+ brt->brt_vlan = vlan;
+
+
+ if ((error = bridge_rtnode_insert(sc, brt)) != 0) {
+ zfree(bridge_rtnode_pool, brt);
+ return (error);
+ }
+ brt->brt_dst = bif;
+ bif->bif_addrcnt++;
+ }
+
+ if ((brt->brt_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC &&
+ brt->brt_dst != bif) {
+ brt->brt_dst->bif_addrcnt--;
+ brt->brt_dst = bif;
+ brt->brt_dst->bif_addrcnt++;
+ }
+
+ if ((flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC) {
+ struct timespec now;
+
+ nanouptime(&now);
+ brt->brt_expire = now.tv_sec + sc->sc_brttimeout;
+ }
+ if (setflags)
+ brt->brt_flags = flags;
+
+
+ return (0);
+}
+
+/*
+ * bridge_rtlookup:
+ *
+ * Lookup the destination interface for an address.
+ */
+static struct ifnet *
+bridge_rtlookup(struct bridge_softc *sc, const uint8_t *addr, uint16_t vlan)
+{
+ struct bridge_rtnode *brt;
+
+ BRIDGE_LOCK_ASSERT(sc);
+
+ if ((brt = bridge_rtnode_lookup(sc, addr, vlan)) == NULL)
+ return (NULL);
+
+ return (brt->brt_ifp);
+}
+
+/*
+ * bridge_rttrim:
+ *
+ * Trim the routine table so that we have a number
+ * of routing entries less than or equal to the
+ * maximum number.
+ */
+static void
+bridge_rttrim(struct bridge_softc *sc)
+{
+ struct bridge_rtnode *brt, *nbrt;
+
+ BRIDGE_LOCK_ASSERT(sc);
+
+ /* Make sure we actually need to do this. */
+ if (sc->sc_brtcnt <= sc->sc_brtmax)
+ return;
+
+ /* Force an aging cycle; this might trim enough addresses. */
+ bridge_rtage(sc);
+ if (sc->sc_brtcnt <= sc->sc_brtmax)
+ return;
+
+ LIST_FOREACH_SAFE(brt, &sc->sc_rtlist, brt_list, nbrt) {
+ if ((brt->brt_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC) {
+ bridge_rtnode_destroy(sc, brt);
+ if (sc->sc_brtcnt <= sc->sc_brtmax)
+ return;
+ }
+ }
+}
+
+/*
+ * bridge_timer:
+ *
+ * Aging timer for the bridge.
+ */
+static void
+bridge_timer(void *arg)
+{
+ struct bridge_softc *sc = arg;
+
+ BRIDGE_LOCK(sc);
+
+ bridge_rtage(sc);
+
+ BRIDGE_UNLOCK(sc);
+
+ if (sc->sc_ifp->if_flags & IFF_RUNNING) {
+ struct timespec ts;
+
+ ts.tv_sec = bridge_rtable_prune_period;
+ ts.tv_nsec = 0;
+ bsd_timeout(bridge_timer, sc, &ts);
+ }
+}
+
+/*
+ * bridge_rtage:
+ *
+ * Perform an aging cycle.
+ */
+static void
+bridge_rtage(struct bridge_softc *sc)
+{
+ struct bridge_rtnode *brt, *nbrt;
+
+ BRIDGE_LOCK_ASSERT(sc);
+
+ LIST_FOREACH_SAFE(brt, &sc->sc_rtlist, brt_list, nbrt) {
+ if ((brt->brt_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC) {
+ struct timespec now;
+
+ nanouptime(&now);
+ if ((unsigned long)now.tv_sec >= brt->brt_expire)
+ bridge_rtnode_destroy(sc, brt);
+ }
+ }
+}
+
+/*
+ * bridge_rtflush:
+ *
+ * Remove all dynamic addresses from the bridge.
+ */
+static void
+bridge_rtflush(struct bridge_softc *sc, int full)
+{
+ struct bridge_rtnode *brt, *nbrt;
+
+ BRIDGE_LOCK_ASSERT(sc);
+
+ LIST_FOREACH_SAFE(brt, &sc->sc_rtlist, brt_list, nbrt) {
+ if (full || (brt->brt_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC)
+ bridge_rtnode_destroy(sc, brt);
+ }
+}
+
+/*
+ * bridge_rtdaddr:
+ *
+ * Remove an address from the table.
+ */
+static int
+bridge_rtdaddr(struct bridge_softc *sc, const uint8_t *addr, uint16_t vlan)
+{
+ struct bridge_rtnode *brt;
+ int found = 0;
+
+ BRIDGE_LOCK_ASSERT(sc);
+
+ /*
+ * If vlan is zero then we want to delete for all vlans so the lookup
+ * may return more than one.
+ */
+ while ((brt = bridge_rtnode_lookup(sc, addr, vlan)) != NULL) {
+ bridge_rtnode_destroy(sc, brt);
+ found = 1;
+ }
+
+ return (found ? 0 : ENOENT);
+}
+
+/*
+ * bridge_rtdelete:
+ *
+ * Delete routes to a speicifc member interface.
+ */
+static void
+bridge_rtdelete(struct bridge_softc *sc, struct ifnet *ifp, int full)
+{
+ struct bridge_rtnode *brt, *nbrt;
+
+ BRIDGE_LOCK_ASSERT(sc);
+
+ LIST_FOREACH_SAFE(brt, &sc->sc_rtlist, brt_list, nbrt) {
+ if (brt->brt_ifp == ifp && (full ||
+ (brt->brt_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC))
+ bridge_rtnode_destroy(sc, brt);
+ }
+}
+
+/*
+ * bridge_rtable_init:
+ *
+ * Initialize the route table for this bridge.
+ */
+static int
+bridge_rtable_init(struct bridge_softc *sc)
+{
+ int i;
+
+ sc->sc_rthash = _MALLOC(sizeof(*sc->sc_rthash) * BRIDGE_RTHASH_SIZE,
+ M_DEVBUF, M_NOWAIT);
+ if (sc->sc_rthash == NULL)
+ return (ENOMEM);
+
+ for (i = 0; i < BRIDGE_RTHASH_SIZE; i++)
+ LIST_INIT(&sc->sc_rthash[i]);
+
+ sc->sc_rthash_key = random();
+
+ LIST_INIT(&sc->sc_rtlist);
+
+ return (0);
+}
+
+/*
+ * bridge_rtable_fini:
+ *
+ * Deconstruct the route table for this bridge.
+ */
+static void
+bridge_rtable_fini(struct bridge_softc *sc)
+{
+
+ KASSERT(sc->sc_brtcnt == 0,
+ ("%s: %d bridge routes referenced", __func__, sc->sc_brtcnt));
+ _FREE(sc->sc_rthash, M_DEVBUF);
+}
+
+/*
+ * The following hash function is adapted from "Hash Functions" by Bob Jenkins
+ * ("Algorithm Alley", Dr. Dobbs Journal, September 1997).
+ */
+#define mix(a, b, c) \
+do { \
+ a -= b; a -= c; a ^= (c >> 13); \
+ b -= c; b -= a; b ^= (a << 8); \
+ c -= a; c -= b; c ^= (b >> 13); \
+ a -= b; a -= c; a ^= (c >> 12); \
+ b -= c; b -= a; b ^= (a << 16); \
+ c -= a; c -= b; c ^= (b >> 5); \
+ a -= b; a -= c; a ^= (c >> 3); \
+ b -= c; b -= a; b ^= (a << 10); \
+ c -= a; c -= b; c ^= (b >> 15); \
+} while (/*CONSTCOND*/0)
+
+static __inline uint32_t
+bridge_rthash(struct bridge_softc *sc, const uint8_t *addr)
+{
+ uint32_t a = 0x9e3779b9, b = 0x9e3779b9, c = sc->sc_rthash_key;
+
+ b += addr[5] << 8;
+ b += addr[4];
+ a += addr[3] << 24;
+ a += addr[2] << 16;
+ a += addr[1] << 8;
+ a += addr[0];
+
+ mix(a, b, c);
+
+ return (c & BRIDGE_RTHASH_MASK);
+}
+
+#undef mix
+
+static int
+bridge_rtnode_addr_cmp(const uint8_t *a, const uint8_t *b)
+{
+ int i, d;
+
+ for (i = 0, d = 0; i < ETHER_ADDR_LEN && d == 0; i++) {
+ d = ((int)a[i]) - ((int)b[i]);
+ }
+
+ return (d);
+}
+
+/*
+ * bridge_rtnode_lookup:
+ *
+ * Look up a bridge route node for the specified destination. Compare the
+ * vlan id or if zero then just return the first match.
+ */
+static struct bridge_rtnode *
+bridge_rtnode_lookup(struct bridge_softc *sc, const uint8_t *addr, uint16_t vlan)
+{
+ struct bridge_rtnode *brt;
+ uint32_t hash;
+ int dir;
+
+ BRIDGE_LOCK_ASSERT(sc);
+
+ hash = bridge_rthash(sc, addr);
+ LIST_FOREACH(brt, &sc->sc_rthash[hash], brt_hash) {
+ dir = bridge_rtnode_addr_cmp(addr, brt->brt_addr);
+ if (dir == 0 && (brt->brt_vlan == vlan || vlan == 0))
+ return (brt);
+ if (dir > 0)
+ return (NULL);
+ }
+
+ return (NULL);
+}
+
+/*
+ * bridge_rtnode_insert:
+ *
+ * Insert the specified bridge node into the route table. We
+ * assume the entry is not already in the table.
+ */
+static int
+bridge_rtnode_insert(struct bridge_softc *sc, struct bridge_rtnode *brt)
+{
+ struct bridge_rtnode *lbrt;
+ uint32_t hash;
+ int dir;
+
+ BRIDGE_LOCK_ASSERT(sc);
+
+ hash = bridge_rthash(sc, brt->brt_addr);
+
+ lbrt = LIST_FIRST(&sc->sc_rthash[hash]);
+ if (lbrt == NULL) {
+ LIST_INSERT_HEAD(&sc->sc_rthash[hash], brt, brt_hash);
+ goto out;
+ }
+
+ do {
+ dir = bridge_rtnode_addr_cmp(brt->brt_addr, lbrt->brt_addr);
+ if (dir == 0 && brt->brt_vlan == lbrt->brt_vlan)
+ return (EEXIST);
+ if (dir > 0) {
+ LIST_INSERT_BEFORE(lbrt, brt, brt_hash);
+ goto out;
+ }
+ if (LIST_NEXT(lbrt, brt_hash) == NULL) {
+ LIST_INSERT_AFTER(lbrt, brt, brt_hash);
+ goto out;
+ }
+ lbrt = LIST_NEXT(lbrt, brt_hash);
+ } while (lbrt != NULL);
+
+#ifdef DIAGNOSTIC
+ panic("bridge_rtnode_insert: impossible");
+#endif
+
+out:
+ LIST_INSERT_HEAD(&sc->sc_rtlist, brt, brt_list);
+ sc->sc_brtcnt++;
+
+ return (0);
+}
+
+/*
+ * bridge_rtnode_destroy:
+ *
+ * Destroy a bridge rtnode.
+ */
+static void
+bridge_rtnode_destroy(struct bridge_softc *sc, struct bridge_rtnode *brt)
+{
+ BRIDGE_LOCK_ASSERT(sc);
+
+ LIST_REMOVE(brt, brt_hash);
+
+ LIST_REMOVE(brt, brt_list);
+ sc->sc_brtcnt--;
+ brt->brt_dst->bif_addrcnt--;
+ zfree(bridge_rtnode_pool, brt);
+}
+
+/*
+ * bridge_rtable_expire:
+ *
+ * Set the expiry time for all routes on an interface.
+ */
+static void
+bridge_rtable_expire(struct ifnet *ifp, int age)
+{
+ struct bridge_softc *sc = ifp->if_bridge;
+ struct bridge_rtnode *brt;
+
+ BRIDGE_LOCK(sc);
+
+ /*
+ * If the age is zero then flush, otherwise set all the expiry times to
+ * age for the interface
+ */
+ if (age == 0)
+ bridge_rtdelete(sc, ifp, IFBF_FLUSHDYN);
+ else {
+ LIST_FOREACH(brt, &sc->sc_rtlist, brt_list) {
+ struct timespec now;
+
+ nanouptime(&now);
+ /* Cap the expiry time to 'age' */
+ if (brt->brt_ifp == ifp &&
+ brt->brt_expire > (unsigned long)now.tv_sec + age &&
+ (brt->brt_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC)
+ brt->brt_expire = (unsigned long)now.tv_sec + age;
+ }
+ }
+ BRIDGE_UNLOCK(sc);
+}
+
+/*
+ * bridge_state_change:
+ *
+ * Callback from the bridgestp code when a port changes states.
+ */
+static void
+bridge_state_change(struct ifnet *ifp, int state)
+{
+ struct bridge_softc *sc = ifp->if_bridge;
+ static const char *stpstates[] = {
+ "disabled",
+ "listening",
+ "learning",
+ "forwarding",
+ "blocking",
+ "discarding"
+ };
+
+ if (log_stp)
+ log(LOG_NOTICE, "%s%d: state changed to %s on %s%d\n",
+ ifnet_name(sc->sc_ifp), ifnet_unit(sc->sc_ifp),
+ stpstates[state],
+ ifnet_name(ifp), ifnet_unit(ifp));
+}
+
+#ifdef PFIL_HOOKS
+/*
+ * Send bridge packets through pfil if they are one of the types pfil can deal
+ * with, or if they are ARP or REVARP. (pfil will pass ARP and REVARP without
+ * question.) If *bifp or *ifp are NULL then packet filtering is skipped for
+ * that interface.
+ */
+static int
+bridge_pfil(struct mbuf **mp, struct ifnet *bifp, struct ifnet *ifp, int dir)
+{
+ int snap, error, i, hlen;
+ struct ether_header *eh1, eh2;
+ struct ip_fw_args args;
+ struct ip *ip;
+ struct llc llc1;
+ u_int16_t ether_type;
+
+ snap = 0;
+ error = -1; /* Default error if not error == 0 */
+
+#if 0
+ /* we may return with the IP fields swapped, ensure its not shared */
+ KASSERT(M_WRITABLE(*mp), ("%s: modifying a shared mbuf", __func__));
+#endif
+
+ if (pfil_bridge == 0 && pfil_member == 0 && pfil_ipfw == 0)
+ return (0); /* filtering is disabled */
+
+ i = min((*mp)->m_pkthdr.len, max_protohdr);
+ if ((*mp)->m_len < i) {
+ *mp = m_pullup(*mp, i);
+ if (*mp == NULL) {
+ printf("%s: m_pullup failed\n", __func__);
+ return (-1);
+ }
+ }
+
+ eh1 = mtod(*mp, struct ether_header *);
+ ether_type = ntohs(eh1->ether_type);
+
+ /*
+ * Check for SNAP/LLC.
+ */
+ if (ether_type < ETHERMTU) {
+ struct llc *llc2 = (struct llc *)(eh1 + 1);
+
+ if ((*mp)->m_len >= ETHER_HDR_LEN + 8 &&
+ llc2->llc_dsap == LLC_SNAP_LSAP &&
+ llc2->llc_ssap == LLC_SNAP_LSAP &&
+ llc2->llc_control == LLC_UI) {
+ ether_type = htons(llc2->llc_un.type_snap.ether_type);
+ snap = 1;
+ }
+ }
+
+ /*
+ * If we're trying to filter bridge traffic, don't look at anything
+ * other than IP and ARP traffic. If the filter doesn't understand
+ * IPv6, don't allow IPv6 through the bridge either. This is lame
+ * since if we really wanted, say, an AppleTalk filter, we are hosed,
+ * but of course we don't have an AppleTalk filter to begin with.
+ * (Note that since pfil doesn't understand ARP it will pass *ALL*
+ * ARP traffic.)
+ */
+ switch (ether_type) {
+ case ETHERTYPE_ARP:
+ case ETHERTYPE_REVARP:
+ if (pfil_ipfw_arp == 0)
+ return (0); /* Automatically pass */
+ break;
+
+ case ETHERTYPE_IP:
+#ifdef INET6
+ case ETHERTYPE_IPV6:
+#endif /* INET6 */
+ break;
+ default:
+ /*
+ * Check to see if the user wants to pass non-ip
+ * packets, these will not be checked by pfil(9) and
+ * passed unconditionally so the default is to drop.
+ */
+ if (pfil_onlyip)
+ goto bad;
+ }
+
+ /* Strip off the Ethernet header and keep a copy. */
+ m_copydata(*mp, 0, ETHER_HDR_LEN, (caddr_t) &eh2);
+ m_adj(*mp, ETHER_HDR_LEN);
+
+ /* Strip off snap header, if present */
+ if (snap) {
+ m_copydata(*mp, 0, sizeof(struct llc), (caddr_t) &llc1);
+ m_adj(*mp, sizeof(struct llc));
+ }
+
+ /*
+ * Check the IP header for alignment and errors
+ */
+ if (dir == PFIL_IN) {
+ switch (ether_type) {
+ case ETHERTYPE_IP:
+ error = bridge_ip_checkbasic(mp);
+ break;
+#ifdef INET6
+ case ETHERTYPE_IPV6:
+ error = bridge_ip6_checkbasic(mp);
+ break;
+#endif /* INET6 */
+ default:
+ error = 0;
+ }
+ if (error)
+ goto bad;
+ }
+
+ if (IPFW_LOADED && pfil_ipfw != 0 && dir == PFIL_OUT && ifp != NULL) {
+ error = -1;
+ args.rule = ip_dn_claim_rule(*mp);
+ if (args.rule != NULL && fw_one_pass)
+ goto ipfwpass; /* packet already partially processed */
+
+ args.m = *mp;
+ args.oif = ifp;
+ args.next_hop = NULL;
+ args.eh = &eh2;
+ args.inp = NULL; /* used by ipfw uid/gid/jail rules */
+ i = ip_fw_chk_ptr(&args);
+ *mp = args.m;
+
+ if (*mp == NULL)
+ return (error);
+
+ if (DUMMYNET_LOADED && (i == IP_FW_DUMMYNET)) {
+
+ /* put the Ethernet header back on */
+ M_PREPEND(*mp, ETHER_HDR_LEN, M_DONTWAIT);
+ if (*mp == NULL)
+ return (error);
+ bcopy(&eh2, mtod(*mp, caddr_t), ETHER_HDR_LEN);
+
+ /*
+ * Pass the pkt to dummynet, which consumes it. The
+ * packet will return to us via bridge_dummynet().
+ */
+ args.oif = ifp;
+ ip_dn_io_ptr(mp, DN_TO_IFB_FWD, &args);
+ return (error);
+ }
+
+ if (i != IP_FW_PASS) /* drop */
+ goto bad;
+ }
+
+ipfwpass:
+ error = 0;
+
+ /*
+ * Run the packet through pfil
+ */
+ switch (ether_type) {
+ case ETHERTYPE_IP:
+ /*
+ * before calling the firewall, swap fields the same as
+ * IP does. here we assume the header is contiguous
+ */
+ ip = mtod(*mp, struct ip *);
+
+ ip->ip_len = ntohs(ip->ip_len);
+ ip->ip_off = ntohs(ip->ip_off);
+
+ /*
+ * Run pfil on the member interface and the bridge, both can
+ * be skipped by clearing pfil_member or pfil_bridge.
+ *
+ * Keep the order:
+ * in_if -> bridge_if -> out_if
+ */
+ if (pfil_bridge && dir == PFIL_OUT && bifp != NULL)
+ error = pfil_run_hooks(&inet_pfil_hook, mp, bifp,
+ dir, NULL);
+
+ if (*mp == NULL || error != 0) /* filter may consume */
+ break;
+
+ if (pfil_member && ifp != NULL)
+ error = pfil_run_hooks(&inet_pfil_hook, mp, ifp,
+ dir, NULL);
+
+ if (*mp == NULL || error != 0) /* filter may consume */
+ break;
+
+ if (pfil_bridge && dir == PFIL_IN && bifp != NULL)
+ error = pfil_run_hooks(&inet_pfil_hook, mp, bifp,
+ dir, NULL);
+
+ if (*mp == NULL || error != 0) /* filter may consume */
+ break;
+
+ /* check if we need to fragment the packet */
+ if (pfil_member && ifp != NULL && dir == PFIL_OUT) {
+ i = (*mp)->m_pkthdr.len;
+ if (i > ifp->if_mtu) {
+ error = bridge_fragment(ifp, *mp, &eh2, snap,
+ &llc1);
+ return (error);
+ }
+ }
+
+ /* Recalculate the ip checksum and restore byte ordering */
+ ip = mtod(*mp, struct ip *);
+ hlen = ip->ip_hl << 2;
+ if (hlen < sizeof(struct ip))
+ goto bad;
+ if (hlen > (*mp)->m_len) {
+ if ((*mp = m_pullup(*mp, hlen)) == 0)
+ goto bad;
+ ip = mtod(*mp, struct ip *);
+ if (ip == NULL)
+ goto bad;
+ }
+ ip->ip_len = htons(ip->ip_len);
+ ip->ip_off = htons(ip->ip_off);
+ ip->ip_sum = 0;
+ if (hlen == sizeof(struct ip))
+ ip->ip_sum = in_cksum_hdr(ip);
+ else
+ ip->ip_sum = in_cksum(*mp, hlen);
+
+ break;
+#ifdef INET6
+ case ETHERTYPE_IPV6:
+ if (pfil_bridge && dir == PFIL_OUT && bifp != NULL)
+ error = pfil_run_hooks(&inet6_pfil_hook, mp, bifp,
+ dir, NULL);
+
+ if (*mp == NULL || error != 0) /* filter may consume */
+ break;
+
+ if (pfil_member && ifp != NULL)
+ error = pfil_run_hooks(&inet6_pfil_hook, mp, ifp,
+ dir, NULL);
+
+ if (*mp == NULL || error != 0) /* filter may consume */
+ break;
+
+ if (pfil_bridge && dir == PFIL_IN && bifp != NULL)
+ error = pfil_run_hooks(&inet6_pfil_hook, mp, bifp,
+ dir, NULL);
+ break;
+#endif
+ default:
+ error = 0;
+ break;
+ }
+
+ if (*mp == NULL)
+ return (error);
+ if (error != 0)
+ goto bad;
+
+ error = -1;
+
+ /*
+ * Finally, put everything back the way it was and return
+ */
+ if (snap) {
+ M_PREPEND(*mp, sizeof(struct llc), M_DONTWAIT);
+ if (*mp == NULL)
+ return (error);
+ bcopy(&llc1, mtod(*mp, caddr_t), sizeof(struct llc));
+ }
+
+ M_PREPEND(*mp, ETHER_HDR_LEN, M_DONTWAIT);
+ if (*mp == NULL)
+ return (error);
+ bcopy(&eh2, mtod(*mp, caddr_t), ETHER_HDR_LEN);
+
+ return (0);
+
+bad:
+ m_freem(*mp);
+ *mp = NULL;
+ return (error);
+}
+
+
+/*
+ * Perform basic checks on header size since
+ * pfil assumes ip_input has already processed
+ * it for it. Cut-and-pasted from ip_input.c.
+ * Given how simple the IPv6 version is,
+ * does the IPv4 version really need to be
+ * this complicated?
+ *
+ * XXX Should we update ipstat here, or not?
+ * XXX Right now we update ipstat but not
+ * XXX csum_counter.
+ */
+static int
+bridge_ip_checkbasic(struct mbuf **mp)
+{
+ struct mbuf *m = *mp;
+ struct ip *ip;
+ int len, hlen;
+ u_short sum;
+
+ if (*mp == NULL)
+ return (-1);
+
+ if (IP_HDR_ALIGNED_P(mtod(m, caddr_t)) == 0) {
+ if ((m = m_copyup(m, sizeof(struct ip),
+ (max_linkhdr + 3) & ~3)) == NULL) {
+ /* XXXJRT new stat, please */
+ ipstat.ips_toosmall++;
+ goto bad;
+ }
+ } else if (__predict_false(m->m_len < sizeof (struct ip))) {
+ if ((m = m_pullup(m, sizeof (struct ip))) == NULL) {
+ ipstat.ips_toosmall++;
+ goto bad;
+ }
+ }
+ ip = mtod(m, struct ip *);
+ if (ip == NULL) goto bad;
+
+ if (ip->ip_v != IPVERSION) {
+ ipstat.ips_badvers++;
+ goto bad;
+ }
+ hlen = ip->ip_hl << 2;
+ if (hlen < sizeof(struct ip)) { /* minimum header length */
+ ipstat.ips_badhlen++;
+ goto bad;
+ }
+ if (hlen > m->m_len) {
+ if ((m = m_pullup(m, hlen)) == 0) {
+ ipstat.ips_badhlen++;
+ goto bad;
+ }
+ ip = mtod(m, struct ip *);
+ if (ip == NULL) goto bad;
+ }
+
+ if (m->m_pkthdr.csum_flags & CSUM_IP_CHECKED) {
+ sum = !(m->m_pkthdr.csum_flags & CSUM_IP_VALID);
+ } else {
+ if (hlen == sizeof(struct ip)) {
+ sum = in_cksum_hdr(ip);
+ } else {
+ sum = in_cksum(m, hlen);
+ }
+ }
+ if (sum) {
+ ipstat.ips_badsum++;
+ goto bad;
+ }
+
+ /* Retrieve the packet length. */
+ len = ntohs(ip->ip_len);
+
+ /*
+ * Check for additional length bogosity
+ */
+ if (len < hlen) {
+ ipstat.ips_badlen++;
+ goto bad;
+ }
+
+ /*
+ * Check that the amount of data in the buffers
+ * is as at least much as the IP header would have us expect.
+ * Drop packet if shorter than we expect.
+ */
+ if (m->m_pkthdr.len < len) {
+ ipstat.ips_tooshort++;
+ goto bad;
+ }
+
+ /* Checks out, proceed */
+ *mp = m;
+ return (0);
+
+bad:
+ *mp = m;
+ return (-1);
+}
+
+#ifdef INET6
+/*
+ * Same as above, but for IPv6.
+ * Cut-and-pasted from ip6_input.c.
+ * XXX Should we update ip6stat, or not?
+ */
+static int
+bridge_ip6_checkbasic(struct mbuf **mp)
+{
+ struct mbuf *m = *mp;
+ struct ip6_hdr *ip6;
+
+ /*
+ * If the IPv6 header is not aligned, slurp it up into a new
+ * mbuf with space for link headers, in the event we forward
+ * it. Otherwise, if it is aligned, make sure the entire base
+ * IPv6 header is in the first mbuf of the chain.
+ */
+ if (IP6_HDR_ALIGNED_P(mtod(m, caddr_t)) == 0) {
+ struct ifnet *inifp = m->m_pkthdr.rcvif;
+ if ((m = m_copyup(m, sizeof(struct ip6_hdr),
+ (max_linkhdr + 3) & ~3)) == NULL) {
+ /* XXXJRT new stat, please */
+ ip6stat.ip6s_toosmall++;
+ in6_ifstat_inc(inifp, ifs6_in_hdrerr);
+ goto bad;
+ }
+ } else if (__predict_false(m->m_len < sizeof(struct ip6_hdr))) {
+ struct ifnet *inifp = m->m_pkthdr.rcvif;
+ if ((m = m_pullup(m, sizeof(struct ip6_hdr))) == NULL) {
+ ip6stat.ip6s_toosmall++;
+ in6_ifstat_inc(inifp, ifs6_in_hdrerr);
+ goto bad;
+ }
+ }
+
+ ip6 = mtod(m, struct ip6_hdr *);
+
+ if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) {
+ ip6stat.ip6s_badvers++;
+ in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
+ goto bad;
+ }
+
+ /* Checks out, proceed */
+ *mp = m;
+ return (0);
+
+bad:
+ *mp = m;
+ return (-1);
+}
+#endif /* INET6 */
+
+/*
+ * bridge_fragment:
+ *
+ * Return a fragmented mbuf chain.
+ */
+static int
+bridge_fragment(struct ifnet *ifp, struct mbuf *m, struct ether_header *eh,
+ int snap, struct llc *llc)
+{
+ struct mbuf *m0;
+ struct ip *ip;
+ int error = -1;
+
+ if (m->m_len < sizeof(struct ip) &&
+ (m = m_pullup(m, sizeof(struct ip))) == NULL)
+ goto out;
+ ip = mtod(m, struct ip *);
+
+ error = ip_fragment(ip, &m, ifp->if_mtu, ifp->if_hwassist,
+ CSUM_DELAY_IP);
+ if (error)
+ goto out;
+
+ /* walk the chain and re-add the Ethernet header */
+ for (m0 = m; m0; m0 = m0->m_nextpkt) {
+ if (error == 0) {
+ if (snap) {
+ M_PREPEND(m0, sizeof(struct llc), M_DONTWAIT);
+ if (m0 == NULL) {
+ error = ENOBUFS;
+ continue;
+ }
+ bcopy(llc, mtod(m0, caddr_t),
+ sizeof(struct llc));
+ }
+ M_PREPEND(m0, ETHER_HDR_LEN, M_DONTWAIT);
+ if (m0 == NULL) {
+ error = ENOBUFS;
+ continue;
+ }
+ bcopy(eh, mtod(m0, caddr_t), ETHER_HDR_LEN);
+ } else
+ m_freem(m);
+ }
+
+ if (error == 0)
+ ipstat.ips_fragmented++;
+
+ return (error);
+
+out:
+ if (m != NULL)
+ m_freem(m);
+ return (error);
+}
+#endif /* PFIL_HOOKS */
+
+static errno_t
+bridge_set_bpf_tap(ifnet_t ifp, bpf_tap_mode mode, bpf_packet_func bpf_callback)
+{
+ struct bridge_softc *sc = (struct bridge_softc *)ifnet_softc(ifp);
+
+ //printf("bridge_set_bpf_tap ifp %p mode %d\n", ifp, mode);
+
+ /* TBD locking */
+ if (sc == NULL || (sc->sc_flags & SCF_DETACHING)) {
+ return ENODEV;
+ }
+
+ switch (mode) {
+ case BPF_TAP_DISABLE:
+ sc->sc_bpf_input = sc->sc_bpf_output = NULL;
+ break;
+
+ case BPF_TAP_INPUT:
+ sc->sc_bpf_input = bpf_callback;
+ break;
+
+ case BPF_TAP_OUTPUT:
+ sc->sc_bpf_output = bpf_callback;
+ break;
+
+ case BPF_TAP_INPUT_OUTPUT:
+ sc->sc_bpf_input = sc->sc_bpf_output = bpf_callback;
+ break;
+
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+static void
+bridge_detach(ifnet_t ifp)
+{
+ struct bridge_softc *sc = (struct bridge_softc *)ifnet_softc(ifp);
+
+ bstp_detach(&sc->sc_stp);
+
+ /* Tear down the routing table. */
+ bridge_rtable_fini(sc);
+
+ lck_mtx_lock(bridge_list_mtx);
+ LIST_REMOVE(sc, sc_list);
+ lck_mtx_unlock(bridge_list_mtx);
+
+ ifnet_release(ifp);
+
+ lck_mtx_free(sc->sc_mtx, bridge_lock_grp);
+
+ _FREE(sc, M_DEVBUF);
+ return;
+}
+
+__private_extern__ errno_t bridge_bpf_input(ifnet_t ifp, struct mbuf *m)
+{
+ struct bridge_softc *sc = (struct bridge_softc *)ifnet_softc(ifp);
+
+ if (sc->sc_bpf_input) {
+ if (mbuf_pkthdr_rcvif(m) != ifp)
+ printf("bridge_bpf_input rcvif: %p != ifp %p\n", mbuf_pkthdr_rcvif(m), ifp);
+ (*sc->sc_bpf_input)(ifp, m);
+ }
+ return 0;
+}
+
+__private_extern__ errno_t bridge_bpf_output(ifnet_t ifp, struct mbuf *m)
+{
+ struct bridge_softc *sc = (struct bridge_softc *)ifnet_softc(ifp);
+
+ if (sc->sc_bpf_output) {
+ (*sc->sc_bpf_output)(ifp, m);
+ }
+ return 0;
+}
projects / apple / xnu.git / blobdiff