+++ /dev/null
-/*
- * Copyright (c) 2004-2009 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@
- */
-
-/* $apfw: Revision 1.19 2008/10/24 02:34:06 cbzimmer Exp $ */
-/* $NetBSD: if_bridge.c,v 1.46 2006/11/23 04:07:07 rpaulo Exp $ */
-
-/*
- * 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.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by Jason L. Wright
- * 4. The name of the author may not be used to endorse or promote products
- * derived from this software without specific prior written permission.
- *
- * 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>
-//_KERNEL_RCSID(0, "$NetBSD: if_bridge.c,v 1.46 2006/11/23 04:07:07 rpaulo Exp $");
-
-//#include "opt_bridge_ipf.h"
-//#include "opt_inet.h"
-//#include "opt_pfil_hooks.h"
-//#include "opt_wlan.h" /* APPLE MODIFICATION <cbz@apple.com> - Proxy STA support */
-//#include "bpfilter.h"
-//#include "gif.h" // APPLE MODIFICATION - add gif support
-
-#define BRIDGE_DEBUG 0
-
-#include <sys/param.h>
-#include <sys/kernel.h>
-#include <sys/mbuf.h>
-#include <sys/queue.h>
-#include <sys/socket.h>
-#include <sys/sockio.h>
-#include <sys/systm.h>
-#include <sys/proc.h>
-//#include <sys/pool.h>
-#include <sys/kauth.h>
-#include <sys/random.h>
-#include <sys/kern_event.h>
-#include <sys/systm.h>
-#include <sys/sysctl.h>
-
-#include <libkern/libkern.h>
-
-#include <kern/zalloc.h>
-
-#if NBPFILTER > 0
-#include <net/bpf.h>
-#endif
-#include <net/if.h>
-#include <net/if_dl.h>
-#include <net/if_types.h>
-#include <net/if_llc.h>
-
-#include <net/if_ether.h>
-#include <net/if_bridgevar.h>
-#include <net/dlil.h>
-
-#include <net/kpi_interfacefilter.h>
-
-#include <netinet/in.h>
-#include <netinet/in_systm.h>
-#include <netinet/ip.h>
-#include <netinet/ip_var.h>
-#ifdef INET6
-#include <netinet/ip6.h>
-#include <netinet6/in6_var.h>
-#include <netinet6/ip6_var.h>
-#endif
-
-#if BRIDGE_DEBUG
-#define static __private_extern__
-#endif
-
-extern void dlil_input_packet_list(struct ifnet *, struct mbuf *);
-
-/*
- * 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)
-
-//#include "carp.h"
-#if NCARP > 0
-#include <netinet/in.h>
-#include <netinet/in_var.h>
-#include <netinet/ip_carp.h>
-#endif
-
-/*
- * Maximum number of addresses to cache.
- */
-#ifndef BRIDGE_RTABLE_MAX
-#define BRIDGE_RTABLE_MAX 100
-#endif
-
-/* APPLE MODIFICATION <cbz@apple.com> - add support for Proxy STA */
-#if IEEE80211_PROXYSTA
-/*
- * Maximum (additional to maxcache) number of proxysta addresses to cache.
- */
-#ifndef BRIDGE_RTABLE_MAX_PROXYSTA
-#define BRIDGE_RTABLE_MAX_PROXYSTA 16
-#endif
-#endif
-
-/*
- * Spanning tree defaults.
- */
-#define BSTP_DEFAULT_MAX_AGE (20 * 256)
-#define BSTP_DEFAULT_HELLO_TIME (2 * 256)
-#define BSTP_DEFAULT_FORWARD_DELAY (15 * 256)
-#define BSTP_DEFAULT_HOLD_TIME (1 * 256)
-#define BSTP_DEFAULT_BRIDGE_PRIORITY 0x8000
-#define BSTP_DEFAULT_PORT_PRIORITY 0x80
-#define BSTP_DEFAULT_PATH_COST 55
-
-/*
- * 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 mask on the member interface.
- */
-#define BRIDGE_IFCAPS_MASK \
- (IFCAP_CSUM_IPv4_Tx | \
- IFCAP_CSUM_TCPv4_Tx | \
- IFCAP_CSUM_UDPv4_Tx | \
- IFCAP_CSUM_TCPv6_Tx | \
- IFCAP_CSUM_UDPv6_Tx)
-
-
-int bridge_rtable_prune_period = BRIDGE_RTABLE_PRUNE_PERIOD;
-
-static zone_t bridge_rtnode_pool = NULL;
-
-static errno_t
-bridge_iff_input(void* cookie, ifnet_t ifp, __unused protocol_family_t protocol,
- mbuf_t *data, char **frame_ptr);
-static void
-bridge_iff_event(void* cookie, ifnet_t ifp, __unused protocol_family_t protocol,
- const struct kev_msg *event_msg);
-static void
-bridge_iff_detached(void* cookie, __unused ifnet_t interface);
-
-static uint32_t
-bridge_rthash(__unused struct bridge_softc *sc, const uint8_t *addr);
-
-static int bridge_clone_create(struct if_clone *, int);
-static void bridge_clone_destroy(struct ifnet *);
-
-static errno_t bridge_ioctl(ifnet_t ifp, unsigned long cmd, void *data);
-#if HAS_IF_CAP
-static void bridge_mutecaps(struct bridge_iflist *, int);
-#endif
-static int bridge_init(struct ifnet *);
-static void bridge_stop(struct ifnet *, int);
-
-#if BRIDGE_MEMBER_OUT_FILTER
-static errno_t
-bridge_iff_output(void *cookie, ifnet_t ifp, protocol_family_t protocol, mbuf_t *data);
-static int bridge_output(struct bridge_softc *sc, ifnet_t ifp, mbuf_t m);
-#endif /* BRIDGE_MEMBER_OUT_FILTER */
-
-static errno_t bridge_start(struct ifnet *, mbuf_t);
-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);
-
-static errno_t bridge_input(struct bridge_iflist *, struct ifnet *, struct mbuf *, void *frame_header);
-
-static void bridge_forward(struct bridge_softc *, struct mbuf *m);
-
-static void bridge_timer(void *);
-
-static void bridge_broadcast(struct bridge_softc *, struct ifnet *,
- struct mbuf *, int);
-
-static int bridge_rtupdate(struct bridge_softc *, const uint8_t *,
- struct ifnet *, int, uint8_t);
-static struct ifnet *bridge_rtlookup(struct bridge_softc *, const uint8_t *);
-static void bridge_rttrim(struct bridge_softc *);
-static void bridge_rtage(struct bridge_softc *);
-static void bridge_rtflush(struct bridge_softc *, int);
-/* APPLE MODIFICATION <cbz@apple.com> - add support for Proxy STA */
-#if IEEE80211_PROXYSTA
-static void bridge_rtdiscovery(struct bridge_softc *);
-static void bridge_rtpurge(struct bridge_softc *, struct ifnet *);
-#endif
-static int bridge_rtdaddr(struct bridge_softc *, const uint8_t *);
-
-static int bridge_rtable_init(struct bridge_softc *);
-static void bridge_rtable_fini(struct bridge_softc *);
-
-static struct bridge_rtnode *bridge_rtnode_lookup(struct bridge_softc *,
- const uint8_t *);
-static int bridge_rtnode_insert(struct bridge_softc *,
- struct bridge_rtnode *);
-static void bridge_rtnode_destroy(struct bridge_softc *,
- struct bridge_rtnode *);
-
-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 *);
-
-static void bridge_ifdetach(struct bridge_iflist *bif, struct ifnet *ifp);
-
-
-static int bridge_ioctl_add(struct bridge_softc *, void *);
-static int bridge_ioctl_del(struct bridge_softc *, void *);
-/* APPLE MODIFICATION <cbz@apple.com> - add support for Proxy STA */
-#if IEEE80211_PROXYSTA
-static int bridge_ioctl_purge(struct bridge_softc *sc, void *arg);
-#endif
-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 *);
-
-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 },
-
- /* APPLE MODIFICATION <cbz@apple.com> - add support for Proxy STA */
-#if IEEE80211_PROXYSTA
- { bridge_ioctl_purge, sizeof(struct ifbreq),
- BC_F_COPYIN|BC_F_SUSER },
-#endif
-};
-
-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 },
-
- /* APPLE MODIFICATION <cbz@apple.com> - add support for Proxy STA */
-#if IEEE80211_PROXYSTA
- { bridge_ioctl_purge, sizeof(struct ifbreq),
- BC_F_COPYIN|BC_F_SUSER },
-#endif
-};
-
-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 lck_rw_t *bridge_list_lock = NULL;
-
-
-static struct if_clone bridge_cloner =
- IF_CLONE_INITIALIZER("bridge",
- bridge_clone_create,
- bridge_clone_destroy,
- 0,
- IF_MAXUNIT);
-
-#if BRIDGE_DEBUG
-
-SYSCTL_DECL(_net_link);
-
-SYSCTL_NODE(_net_link, IFT_BRIDGE, bridge, CTLFLAG_RW | CTLFLAG_LOCKED, 0, "Bridge");
-
-__private_extern__ int _if_brige_debug = 0;
-
-SYSCTL_INT(_net_link_bridge, OID_AUTO, debug, CTLFLAG_RW,
- &_if_brige_debug, 0, "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);
-
-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);
-}
-#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;
-
- bridge_rtnode_pool = zinit(sizeof(struct bridge_rtnode), 1024 * sizeof(struct bridge_rtnode),
- 0, "bridge_rtnode");
-
- 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_lock = lck_rw_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);
- error = if_clone_attach(&bridge_cloner);
-
- return error;
-}
-
-#if BRIDGE_DEBUG
-
-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 */
-
-
-/*
- * bridge_clone_create:
- *
- * Create a new bridge instance.
- */
-/* APPLE MODIFICATION <cbz@apple.com> - add opaque <const caddr_t params> argument for cloning. This is done for
- net80211's VAP creation (with the Marvell codebase). I think this could end up being useful
- for other devices, too. This is not in an ifdef because it doesn't hurt anything to have
- this extra param */
-static int
-bridge_clone_create(struct if_clone *ifc, int unit)
-{
- struct bridge_softc *sc = NULL;
- struct ifnet *ifp = NULL;
- u_char eaddr[6];
- uint32_t r;
- 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_brtmax = BRIDGE_RTABLE_MAX;
- /* APPLE MODIFICATION <cbz@apple.com> - add support for Proxy STA */
-#if IEEE80211_PROXYSTA
- sc->sc_brtmax_proxysta = BRIDGE_RTABLE_MAX_PROXYSTA;
-#endif
- sc->sc_brttimeout = BRIDGE_RTABLE_TIMEOUT;
- sc->sc_bridge_max_age = BSTP_DEFAULT_MAX_AGE;
- sc->sc_bridge_hello_time = BSTP_DEFAULT_HELLO_TIME;
- sc->sc_bridge_forward_delay = BSTP_DEFAULT_FORWARD_DELAY;
- sc->sc_bridge_priority = BSTP_DEFAULT_BRIDGE_PRIORITY;
- sc->sc_hold_time = BSTP_DEFAULT_HOLD_TIME;
- 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;
- }
-
- LIST_INIT(&sc->sc_iflist);
-
- sc->sc_mtx = lck_mtx_alloc_init(bridge_lock_grp, bridge_lock_attr);
-
- /* 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_if = 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;
- }
-
- /*
- * Generate a random ethernet address and use the private AC:DE:48
- * OUI code.
- */
- 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;
-
- 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
-
- lck_rw_lock_exclusive(bridge_list_lock);
- LIST_INSERT_HEAD(&bridge_list, sc, sc_list);
- lck_rw_done(bridge_list_lock);
-
- /* 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 void
-bridge_clone_destroy(struct ifnet *ifp)
-{
- struct bridge_softc *sc = (struct bridge_softc *)ifnet_softc(ifp);
- struct bridge_iflist *bif;
- int error;
-
- lck_mtx_lock(sc->sc_mtx);
- if ((sc->sc_flags & SCF_DETACHING)) {
- lck_mtx_unlock(sc->sc_mtx);
- return;
- }
- 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 = LIST_FIRST(&sc->sc_iflist)) != NULL)
- bridge_delete_member(sc, bif);
-
- lck_mtx_unlock(sc->sc_mtx);
-
- error = ifnet_detach(ifp);
- if (error != 0) {
- printf("bridge_clone_destroy: ifnet_detach failed %d\n", error);
- if ((sc = (struct bridge_softc *)ifnet_softc(ifp)) != NULL) {
- lck_mtx_lock(sc->sc_mtx);
- sc->sc_flags &= ~SCF_DETACHING;
- lck_mtx_unlock(sc->sc_mtx);
- }
- }
-
- return;
-}
-
-#define DRVSPEC \
- if (ifd->ifd_cmd >= bridge_control_table_size) { \
- error = EINVAL; \
- break; \
- } \
- bc = &bridge_control_table[ifd->ifd_cmd]; \
- \
- if ((cmd & IOC_DIRMASK) == IOC_INOUT && \
- (bc->bc_flags & BC_F_COPYOUT) == 0) { \
- error = EINVAL; \
- break; \
- } \
- else if (((cmd & IOC_DIRMASK) == IOC_IN) && \
- (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; \
- } \
- \
- memset(&args, 0, sizeof(args)); \
- if (bc->bc_flags & BC_F_COPYIN) { \
- error = copyin(ifd->ifd_data, &args, ifd->ifd_len); \
- if (error) \
- break; \
- } \
- \
- lck_mtx_lock(sc->sc_mtx); \
- error = (*bc->bc_func)(sc, &args); \
- lck_mtx_unlock(sc->sc_mtx); \
- if (error) \
- break; \
- \
- if (bc->bc_flags & BC_F_COPYOUT) \
- error = copyout(&args, ifd->ifd_data, ifd->ifd_len)
-
-/*
- * bridge_ioctl:
- *
- * Handle a control request from the operator.
- */
-static errno_t
-bridge_ioctl(ifnet_t ifp, unsigned long cmd, void *data)
-{
- struct bridge_softc *sc = ifnet_softc(ifp);
- struct ifreq *ifr = (struct ifreq *) data;
- int error = 0;
-
- lck_mtx_assert(sc->sc_mtx, LCK_MTX_ASSERT_NOTOWNED);
-
-#if BRIDGE_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);
- printf("SIOCGDRVSPEC32 %lx SIOCGDRVSPEC64 %lx\n", SIOCGDRVSPEC32, SIOCGDRVSPEC64);
-#endif
-
- switch (cmd) {
- case SIOCADDMULTI:
- break;
- case SIOCDELMULTI:
- break;
-
- case SIOCSDRVSPEC32:
- case SIOCGDRVSPEC32: {
- union {
- struct ifbreq ifbreq;
- struct ifbifconf32 ifbifconf;
- struct ifbareq32 ifbareq;
- struct ifbaconf32 ifbaconf;
- struct ifbrparam ifbrparam;
- } 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;
- } args;
- struct ifdrv64 *ifd = (struct ifdrv64 *) data;
- const struct bridge_control *bridge_control_table = bridge_control_table64, *bc;
-
- DRVSPEC;
-
- break;
- }
-
- case SIOCSIFFLAGS:
- if ((ifnet_flags(ifp) & (IFF_UP|IFF_RUNNING)) == IFF_RUNNING) {
- /*
- * If interface is marked down and it is running,
- * then stop and disable it.
- */
- lck_mtx_lock(sc->sc_mtx);
- bridge_stop(ifp, 1);
- lck_mtx_unlock(sc->sc_mtx);
- } else if ((ifnet_flags(ifp) & (IFF_UP|IFF_RUNNING)) == IFF_UP) {
- /*
- * If interface is marked up and it is stopped, then
- * start it.
- */
- lck_mtx_lock(sc->sc_mtx);
- error = bridge_init(ifp);
- lck_mtx_unlock(sc->sc_mtx);
- }
- break;
-
- case SIOCSIFMTU:
-#if 0
- /* APPLE MODIFICATION <cbz@apple.com>
- if we wanted to support changing the MTU */
- {
- struct ifreq *ifr = (struct ifreq *)data;
- struct bridge_iflist *bif;
- struct ifnet *dst_if;
- sc->sc_if.if_mtu = ifr->ifr_mtu;
- LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
- dst_if = bif->bif_ifp;
- error = ifnet_ioctl(dst_if, 0, cmd, data);
- if (error)
- break;
- }
- }
-#else
- /* Do not allow the MTU to be changed on the bridge */
- error = EINVAL;
-#endif
- break;
-
- /* APPLE MODIFICATION - don't pass this down to ether_ioctl, just indicate we don't handle it */
- case SIOCGIFMEDIA:
- error = EINVAL;
- 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;
-
- default:
- 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);
-}
-
-/*
- * bridge_mutecaps:
- *
- * Clear or restore unwanted capabilities on the member interface
- */
-#if HAS_IF_CAP
-void
-bridge_mutecaps(struct bridge_iflist *bif, int mute)
-{
- struct ifnet *ifp = bif->bif_ifp;
- struct ifcapreq ifcr;
-
- if (ifp->if_ioctl == NULL)
- return;
-
- memset(&ifcr, 0, sizeof(ifcr));
- ifcr.ifcr_capenable = ifp->if_capenable;
-
- if (mute) {
- /* mask off and save capabilities */
- bif->bif_mutecap = ifcr.ifcr_capenable & BRIDGE_IFCAPS_MASK;
- if (bif->bif_mutecap != 0)
- ifcr.ifcr_capenable &= ~BRIDGE_IFCAPS_MASK;
- } else
- /* restore muted capabilities */
- ifcr.ifcr_capenable |= bif->bif_mutecap;
-
- if (bif->bif_mutecap != 0) {
- (void) (*ifp->if_ioctl)(ifp, SIOCSIFCAP, (caddr_t)&ifcr);
- }
-}
-#endif /* HAS_IF_CAP */
-
-/*
- * bridge_lookup_member:
- */
-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];
-
- lck_mtx_assert(sc->sc_mtx, LCK_MTX_ASSERT_OWNED);
-
- LIST_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:
- */
-static struct bridge_iflist *
-bridge_lookup_member_if(struct bridge_softc *sc, struct ifnet *member_ifp)
-{
- struct bridge_iflist *bif;
-
- lck_mtx_assert(sc->sc_mtx, LCK_MTX_ASSERT_OWNED);
-
- LIST_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_if), ifnet_unit(sc->sc_if),
- 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(bif, 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_if), ifnet_unit(sc->sc_if),
- 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:
- bridge_ifdetach(bif, ifp);
- break;
-
- default:
- break;
- }
- }
-}
-
-static void
-bridge_iff_detached(void* cookie, __unused ifnet_t interface)
-{
- struct bridge_iflist *bif = (struct bridge_iflist *)cookie;
-
- _FREE(bif, M_DEVBUF);
-
- return;
-}
-
-/*
- * bridge_delete_member:
- *
- * Delete the specified member interface.
- */
-static void
-bridge_delete_member(struct bridge_softc *sc, struct bridge_iflist *bif)
-{
- struct ifnet *ifs = bif->bif_ifp;
-
- switch (ifnet_type(ifs)) {
- case IFT_ETHER:
- /*
- * Take the interface out of promiscuous mode.
- */
- (void) ifnet_set_promiscuous(ifs, 0);
- break;
-#if NGIF > 0
- case IFT_GIF:
- break;
-#endif
- default:
-#ifdef DIAGNOSTIC
- panic("bridge_delete_member: impossible");
-#endif
- break;
- }
-
- ifs->if_bridge = NULL;
- LIST_REMOVE(bif, bif_next);
-
- /* Respect lock ordering with DLIL lock */
- lck_mtx_unlock(sc->sc_mtx);
- iflt_detach(bif->bif_iff_ref);
- lck_mtx_lock(sc->sc_mtx);
-
- bridge_rtdelete(sc, ifs, IFBF_FLUSHALL);
-
- if (ifnet_flags(sc->sc_if) & IFF_RUNNING)
- bstp_initialization(sc);
-
- /* On the last deleted interface revert the MTU */
-
- if (LIST_EMPTY(&sc->sc_iflist))
- (void) ifnet_set_mtu(sc->sc_if, ETHERMTU);
-}
-
-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;
- /* APPLE MODIFICATION <cbz@apple.com> - is this a proxy sta being added? */
-#if IEEE80211_PROXYSTA
- struct bridge_rtnode *brt;
-#endif
-
- error = ifnet_find_by_name(req->ifbr_ifsname, &ifs);
- if (error || ifs == NULL)
- return (ENOENT);
-
- /* Is the interface already attached to this bridge interface */
- if (ifs->if_bridge == sc)
- return (EEXIST);
-
- if (ifs->if_bridge != NULL)
- return (EBUSY);
-
- /* First added interface resets the MTU */
-
- if (LIST_EMPTY(&sc->sc_iflist))
- (void) ifnet_set_mtu(sc->sc_if, ETHERMTU);
-
- if (ifnet_mtu(sc->sc_if) != ifnet_mtu(ifs))
- return (EINVAL);
-
- bif = _MALLOC(sizeof(*bif), M_DEVBUF, M_WAITOK|M_ZERO);
- if (bif == NULL)
- return (ENOMEM);
-
- bif->bif_ifp = ifs;
- bif->bif_flags = IFBIF_LEARNING | IFBIF_DISCOVER;
- bif->bif_priority = BSTP_DEFAULT_PORT_PRIORITY;
- bif->bif_path_cost = BSTP_DEFAULT_PATH_COST;
- bif->bif_sc = sc;
-
- switch (ifnet_type(ifs)) {
- case IFT_ETHER:
- /*
- * Place the interface into promiscuous mode.
- */
- error = ifnet_set_promiscuous(ifs, 1);
- if (error)
- goto out;
-#if HAS_IF_CAP
- bridge_mutecaps(bif, 1);
-#endif
- break;
-#if NGIF > 0
- case IFT_GIF:
- break;
-#endif
- default:
- error = EINVAL;
- goto out;
- }
-
- /*
- * If the LINK0 flag is set, and this is the first member interface,
- * attempt to inherit its link-layer address.
- */
- if ((ifnet_flags(sc->sc_if) & IFF_LINK0) && LIST_EMPTY(&sc->sc_iflist) &&
- ifnet_type(ifs) == IFT_ETHER) {
- (void) ifnet_set_lladdr(sc->sc_if, ifnet_lladdr(ifs),
- ETHER_ADDR_LEN);
- }
-
- // install an interface filter
- {
- struct iff_filter iff;
-
- 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;
-
- /* Respect lock ordering with DLIL lock */
- lck_mtx_unlock(sc->sc_mtx);
- error = iflt_attach(ifs, &iff, &bif->bif_iff_ref);
- lck_mtx_lock(sc->sc_mtx);
- if (error != 0) {
- printf("bridge_ioctl_add: iflt_attach failed %d\n", error);
- goto out;
- }
- }
- ifs->if_bridge = sc;
- LIST_INSERT_HEAD(&sc->sc_iflist, bif, bif_next);
-
-
- if (ifnet_flags(sc->sc_if) & IFF_RUNNING)
- bstp_initialization(sc);
- else
- bstp_stop(sc);
-
- /* APPLE MODIFICATION <cbz@apple.com> - is this a proxy sta being added? */
-#if IEEE80211_PROXYSTA
- brt = bridge_rtnode_lookup(sc, ifnet_lladdr(ifs));
- if (brt) {
-#if DIAGNOSTIC
- printf( "%s: attach %s to bridge as proxysta for %02x:%02x:%02x:%02x:%02x:%02x discovered on %s\n",
- __func__, ifs->if_xname, brt->brt_addr[0], brt->brt_addr[1], brt->brt_addr[2],
- brt->brt_addr[3], brt->brt_addr[4], brt->brt_addr[5], brt->brt_ifp->if_xname );
-#endif
- brt->brt_ifp_proxysta = ifs;
- }
-#endif
-
-
-out:
- if (error) {
- if (bif != NULL)
- _FREE(bif, M_DEVBUF);
- }
- 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);
-
- return (0);
-}
-
-/* APPLE MODIFICATION <cbz@apple.com> - add support for Proxy STA */
-#if IEEE80211_PROXYSTA
-static int
-bridge_ioctl_purge(struct bridge_softc *sc, void *arg)
-{
- struct ifbreq *req = arg;
- struct bridge_iflist *bif;
- struct ifnet *ifs;
-
- bif = bridge_lookup_member(sc, req->ifbr_ifsname);
- if (bif == NULL)
- return (ENOENT);
-
- ifs = bif->bif_ifp;
- bridge_rtpurge(sc, ifs);
-
- return (0);
-}
-#endif
-
-static int
-bridge_ioctl_gifflags(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);
-
- req->ifbr_ifsflags = bif->bif_flags;
- req->ifbr_state = bif->bif_state;
- req->ifbr_priority = bif->bif_priority;
- req->ifbr_path_cost = bif->bif_path_cost;
- req->ifbr_portno = ifnet_index(bif->bif_ifp) & 0xffff;
-
- return (0);
-}
-
-static int
-bridge_ioctl_sifflags(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);
-
- if (req->ifbr_ifsflags & IFBIF_STP) {
- switch (ifnet_type(bif->bif_ifp)) {
- case IFT_ETHER:
- /* These can do spanning tree. */
- break;
-
- default:
- /* Nothing else can. */
- return (EINVAL);
- }
- }
-
- /* APPLE MODIFICATION <cbz@apple.com> - add support for Proxy STA */
-#if IEEE80211_PROXYSTA
- if ((bif->bif_flags & IFBIF_PROXYSTA_DISCOVER) &&
- ((req->ifbr_ifsflags & IFBIF_PROXYSTA_DISCOVER) == 0))
- bridge_rtpurge(sc, bif->bif_ifp);
-#endif
-
- bif->bif_flags = req->ifbr_ifsflags;
-
- if (ifnet_flags(sc->sc_if) & IFF_RUNNING)
- bstp_initialization(sc);
-
- /* APPLE MODIFICATION <cbz@apple.com> - add support for Proxy STA */
-#if IEEE80211_PROXYSTA
- if (bif->bif_flags & IFBIF_PROXYSTA_DISCOVER)
- bridge_rtdiscovery(sc);
-#endif
-
- 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 \
- struct bridge_iflist *bif; \
- struct ifbreq breq; \
- int count, error = 0; \
- uint32_t len; \
- \
- count = 0; \
- LIST_FOREACH(bif, &sc->sc_iflist, bif_next) \
- count++; \
- \
- if (bifc->ifbic_len == 0) { \
- bifc->ifbic_len = sizeof(breq) * count; \
- return (0); \
- } \
- \
- count = 0; \
- len = bifc->ifbic_len; \
- memset(&breq, 0, sizeof breq); \
- LIST_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)); \
- breq.ifbr_ifsflags = bif->bif_flags; \
- breq.ifbr_state = bif->bif_state; \
- breq.ifbr_priority = bif->bif_priority; \
- breq.ifbr_path_cost = bif->bif_path_cost; \
- breq.ifbr_portno = ifnet_index(bif->bif_ifp) & 0xffff; \
- error = copyout(&breq, bifc->ifbic_req + count * sizeof(breq), sizeof(breq)); \
- if (error) \
- break; \
- count++; \
- len -= sizeof(breq); \
- } \
- \
- bifc->ifbic_len = sizeof(breq) * count
-
-
-static int
-bridge_ioctl_gifs64(struct bridge_softc *sc, void *arg)
-{
- struct ifbifconf64 *bifc = arg;
-
- BRIDGE_IOCTL_GIFS;
-
- return (error);
-}
-
-static int
-bridge_ioctl_gifs32(struct bridge_softc *sc, void *arg)
-{
- struct ifbifconf32 *bifc = arg;
-
- BRIDGE_IOCTL_GIFS;
-
- return (error);
-}
-
-#define BRIDGE_IOCTL_RTS \
- struct bridge_rtnode *brt; \
- int count = 0, error = 0; \
- uint32_t len; \
- struct timespec now; \
- \
- if (bac->ifbac_len == 0) \
- return (0); \
- \
- len = bac->ifbac_len; \
- LIST_FOREACH(brt, &sc->sc_rtlist, brt_list) { \
- if (len < sizeof(bareq)) \
- goto out; \
- memset(&bareq, 0, sizeof(bareq)); \
- 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)); \
- if ((brt->brt_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC) { \
- nanouptime(&now); \
- if (brt->brt_expire >= (unsigned long)now.tv_sec) \
- bareq.ifba_expire = brt->brt_expire - now.tv_sec; \
- else \
- bareq.ifba_expire = 0; \
- } else \
- bareq.ifba_expire = 0; \
- bareq.ifba_flags = brt->brt_flags; \
- \
- error = copyout(&bareq, bac->ifbac_req + count * sizeof(bareq), sizeof(bareq)); \
- if (error) \
- goto out; \
- count++; \
- len -= sizeof(bareq); \
- } \
-out: \
- bac->ifbac_len = sizeof(bareq) * count
-
-
-static int
-bridge_ioctl_rts64(struct bridge_softc *sc, void *arg)
-{
- struct ifbaconf64 *bac = arg;
- struct ifbareq64 bareq;
-
- BRIDGE_IOCTL_RTS;
-
- return (error);
-}
-
-static int
-bridge_ioctl_rts32(struct bridge_softc *sc, void *arg)
-{
- struct ifbaconf32 *bac = arg;
- struct ifbareq32 bareq;
-
- BRIDGE_IOCTL_RTS;
-
- 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, bif->bif_ifp, 1,
- req->ifba_flags);
-
- 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, bif->bif_ifp, 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_daddr64(struct bridge_softc *sc, void *arg)
-{
- struct ifbareq64 *req = arg;
-
- return (bridge_rtdaddr(sc, req->ifba_dst));
-}
-
-static int
-bridge_ioctl_daddr32(struct bridge_softc *sc, void *arg)
-{
- struct ifbareq32 *req = arg;
-
- return (bridge_rtdaddr(sc, req->ifba_dst));
-}
-
-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;
-
- param->ifbrp_prio = sc->sc_bridge_priority;
-
- return (0);
-}
-
-static int
-bridge_ioctl_spri(struct bridge_softc *sc, void *arg)
-{
- struct ifbrparam *param = arg;
-
- sc->sc_bridge_priority = param->ifbrp_prio;
-
- if (ifnet_flags(sc->sc_if) & IFF_RUNNING)
- bstp_initialization(sc);
-
- return (0);
-}
-
-static int
-bridge_ioctl_ght(struct bridge_softc *sc, void *arg)
-{
- struct ifbrparam *param = arg;
-
- param->ifbrp_hellotime = sc->sc_bridge_hello_time >> 8;
-
- return (0);
-}
-
-static int
-bridge_ioctl_sht(struct bridge_softc *sc, void *arg)
-{
- struct ifbrparam *param = arg;
-
- if (param->ifbrp_hellotime == 0)
- return (EINVAL);
- sc->sc_bridge_hello_time = param->ifbrp_hellotime << 8;
-
- if (ifnet_flags(sc->sc_if) & IFF_RUNNING)
- bstp_initialization(sc);
-
- return (0);
-}
-
-static int
-bridge_ioctl_gfd(struct bridge_softc *sc, void *arg)
-{
- struct ifbrparam *param = arg;
-
- param->ifbrp_fwddelay = sc->sc_bridge_forward_delay >> 8;
-
- return (0);
-}
-
-static int
-bridge_ioctl_sfd(struct bridge_softc *sc, void *arg)
-{
- struct ifbrparam *param = arg;
-
- if (param->ifbrp_fwddelay == 0)
- return (EINVAL);
- sc->sc_bridge_forward_delay = param->ifbrp_fwddelay << 8;
-
- if (ifnet_flags(sc->sc_if) & IFF_RUNNING)
- bstp_initialization(sc);
-
- return (0);
-}
-
-static int
-bridge_ioctl_gma(struct bridge_softc *sc, void *arg)
-{
- struct ifbrparam *param = arg;
-
- param->ifbrp_maxage = sc->sc_bridge_max_age >> 8;
-
- return (0);
-}
-
-static int
-bridge_ioctl_sma(struct bridge_softc *sc, void *arg)
-{
- struct ifbrparam *param = arg;
-
- if (param->ifbrp_maxage == 0)
- return (EINVAL);
- sc->sc_bridge_max_age = param->ifbrp_maxage << 8;
-
- if (ifnet_flags(sc->sc_if) & IFF_RUNNING)
- bstp_initialization(sc);
-
- return (0);
-}
-
-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);
-
- bif->bif_priority = req->ifbr_priority;
-
- if (ifnet_flags(sc->sc_if) & IFF_RUNNING)
- bstp_initialization(sc);
-
- return (0);
-}
-
-/* APPLE MODIFICATION <cbz@apple.com> - add support for Proxy STA */
-#if IEEE80211_PROXYSTA
-static void
-bridge_proxysta_notify_macaddr(struct ifnet *ifp, int op, const uint8_t *mac)
-{
- struct proxy_sta_event iev;
-
- memset(&iev, 0, sizeof(iev));
- memcpy(iev.iev_addr, mac, ETHER_ADDR_LEN);
-
- rt_proxystamsg(ifp, op, &iev, sizeof(iev));
-}
-
-static void
-bridge_proxysta_discover(struct ifnet *ifp, const uint8_t *mac)
-{
- bridge_proxysta_notify_macaddr( ifp, RTM_PROXYSTA_DISCOVERY, mac );
-}
-
-static void
-bridge_proxysta_idle_timeout(struct ifnet *ifp, const uint8_t *mac)
-{
- bridge_proxysta_notify_macaddr( ifp, RTM_PROXYSTA_IDLE_TIMEOUT, mac );
-}
-#endif
-
-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);
-
- bif->bif_path_cost = req->ifbr_path_cost;
-
- if (ifnet_flags(sc->sc_if) & IFF_RUNNING)
- bstp_initialization(sc);
-
- return (0);
-}
-
-/*
- * bridge_ifdetach:
- *
- * Detach an interface from a bridge. Called when a member
- * interface is detaching.
- */
-static void
-bridge_ifdetach(struct bridge_iflist *bif, struct ifnet *ifp)
-{
- struct bridge_softc *sc = bif->bif_sc;
- struct ifbreq breq;
-
- memset(&breq, 0, sizeof(breq));
- snprintf(breq.ifbr_ifsname, sizeof(breq.ifbr_ifsname), "%s%d",
- ifnet_name(ifp), ifnet_unit(ifp));
-
- lck_mtx_lock(sc->sc_mtx);
-
- (void) bridge_ioctl_del(sc, &breq);
-
- lck_mtx_unlock(sc->sc_mtx);
-}
-
-/*
- * bridge_init:
- *
- * Initialize a bridge interface.
- */
-static int
-bridge_init(struct ifnet *ifp)
-{
- struct bridge_softc *sc = ifnet_softc(ifp);
- struct timespec ts;
- errno_t error;
-
- 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_initialization(sc);
-
- return error;
-}
-
-/*
- * bridge_stop:
- *
- * Stop the bridge interface.
- */
-static void
-bridge_stop(struct ifnet *ifp, __unused int disable)
-{
- struct bridge_softc *sc = ifnet_softc(ifp);
-
- if ((ifnet_flags(ifp) & IFF_RUNNING) == 0)
- return;
-
- bsd_untimeout(bridge_timer, sc);
- bstp_stop(sc);
-
- bridge_rtflush(sc, IFBF_FLUSHDYN);
-
- (void) ifnet_set_flags(ifp, 0, IFF_RUNNING);
-}
-
-/*
- * bridge_enqueue:
- *
- * Enqueue a packet on a bridge member interface.
- *
- * Note: this is called both on the input and output path so this routine
- * cannot simply muck with the HW checksum flag. For the time being we
- * rely on the caller to do the right thing.
- */
-__private_extern__ void
-bridge_enqueue(struct bridge_softc *sc, struct ifnet *dst_ifp, struct mbuf *m)
-{
- int len, error;
-
- lck_mtx_assert(sc->sc_mtx, LCK_MTX_ASSERT_OWNED);
-
-#if BRIDGE_DEBUG
- if (_if_brige_debug)
- printf("bridge_enqueue sc %s%d to dst_ifp %s%d m %p\n",
- ifnet_name(sc->sc_if), ifnet_unit(sc->sc_if),
- ifnet_name(dst_ifp), ifnet_unit(dst_ifp), m);
-#endif /* BRIDGE_DEBUG */
-
- len = m->m_pkthdr.len;
- m->m_flags |= M_PROTO1; //set to avoid loops
-
- error = ifnet_output_raw(dst_ifp, 0, m);
- if (error == 0) {
- (void) ifnet_stat_increment_out(sc->sc_if, 1, len, 0);
- } else {
- (void) ifnet_stat_increment_out(sc->sc_if, 0, 0, 1);
- }
-
- return;
-}
-
-
-#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 bridge_softc *sc, ifnet_t ifp, mbuf_t m)
-{
- struct ether_header *eh;
- struct ifnet *dst_if;
-
-#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) {
- printf("bridge_output ifp %p m_pullup failed\n", ifp);
- return EJUSTRETURN;
- }
- }
-
- eh = mtod(m, struct ether_header *);
-
- /* APPLE MODIFICATION <jhw@apple.com>
- * 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 ((ifnet_flags(sc->sc_if) & IFF_RUNNING) == 0) {
- dst_if = ifp;
- goto sendunicast;
- }
-
- lck_mtx_lock(sc->sc_mtx);
-
- /*
- * 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);
- if (dst_if == NULL) {
- struct bridge_iflist *bif;
- struct mbuf *mc;
- int used = 0;
-
- LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
- dst_if = bif->bif_ifp;
- if ((ifnet_flags(dst_if) & 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) != 0) {
- switch (bif->bif_state) {
- case BSTP_IFSTATE_BLOCKING:
- case BSTP_IFSTATE_LISTENING:
- case BSTP_IFSTATE_DISABLED:
- continue;
- }
- }
-
- if (LIST_NEXT(bif, bif_next) == NULL) {
- used = 1;
- mc = m;
- } else {
- mc = m_copym(m, 0, M_COPYALL, M_NOWAIT);
- if (mc == NULL) {
- printf("bridge_output ifp %p m_copym failed\n", ifp);
- (void) ifnet_stat_increment_out(sc->sc_if, 0, 0, 1);
- continue;
- }
- }
-
- bridge_enqueue(sc, dst_if, mc);
- }
- if (used == 0) {
- printf("bridge_output ifp %p not used\n", ifp);
- m_freem(m);
- }
- lck_mtx_unlock(sc->sc_mtx);
-
- return EJUSTRETURN;
- }
-
-sendunicast:
- /*
- * XXX Spanning tree consideration here?
- */
-
- if ((ifnet_flags(dst_if) & IFF_RUNNING) == 0) {
- printf("bridge_output ifp %p dst_if %p not running\n", ifp, dst_if);
- m_freem(m);
-
- return EJUSTRETURN;
- }
-
- if (dst_if != ifp) {
- lck_mtx_lock(sc->sc_mtx);
-
- bridge_enqueue(sc, dst_if, m);
-
- lck_mtx_unlock(sc->sc_mtx);
-
- return EJUSTRETURN;
- }
-
- 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(ifnet_t ifp, mbuf_t 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 *);
-
- if ((m->m_flags & (M_BCAST|M_MCAST)) == 0 &&
- (dst_if = bridge_rtlookup(sc, eh->ether_dhost)) != 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
- lck_mtx_lock(sc->sc_mtx);
- #if NBPFILTER > 0
- if (sc->sc_bpf_output)
- bridge_bpf_output(ifp, m);
- #endif
- bridge_enqueue(sc, dst_if, m);
- lck_mtx_unlock(sc->sc_mtx);
- }
- } 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
-
- lck_mtx_lock(sc->sc_mtx);
- #if NBPFILTER > 0
- if (sc->sc_bpf_output)
- bridge_bpf_output(ifp, m);
- #endif
- bridge_broadcast(sc, ifp, m, 0);
- lck_mtx_unlock(sc->sc_mtx);
- }
-#if APPLE_BRIDGE_HWCKSUM_SUPPORT
-done:
-#endif
-
- return 0;
-}
-
-/*
- * bridge_forward:
- *
- * The forwarding function of the bridge.
- */
-static void
-bridge_forward(struct bridge_softc *sc, struct mbuf *m)
-{
- struct bridge_iflist *bif;
- struct ifnet *src_if, *dst_if;
- struct ether_header *eh;
-
- 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_if), ifnet_unit(sc->sc_if), m);
-#endif /* BRIDGE_DEBUG */
-
- src_if = m->m_pkthdr.rcvif;
-
- (void) ifnet_stat_increment_in(sc->sc_if, 1, m->m_pkthdr.len, 0);
-
- /*
- * Look up the bridge_iflist.
- */
- bif = bridge_lookup_member_if(sc, src_if);
- if (bif == NULL) {
- /* Interface is not a bridge member (anymore?) */
- m_freem(m);
- return;
- }
-
- /* APPLE MODIFICATION <cbz@apple.com> - add the ability to block forwarding of packets; for the guest network */
-#if ( APPLE_HAVE_80211_GUEST_NETWORK )
- if (bif->bif_flags & IFBIF_NO_FORWARDING) {
- /* Drop the packet and we're done. */
- m_freem(m);
- return;
- }
-#endif
-
- if (bif->bif_flags & IFBIF_STP) {
- switch (bif->bif_state) {
- case BSTP_IFSTATE_BLOCKING:
- case BSTP_IFSTATE_LISTENING:
- case BSTP_IFSTATE_DISABLED:
- m_freem(m);
- return;
- }
- }
-
- eh = mtod(m, struct ether_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,
- src_if, 0, IFBAF_DYNAMIC);
- }
-
- if ((bif->bif_flags & IFBIF_STP) != 0 &&
- bif->bif_state == BSTP_IFSTATE_LEARNING) {
- m_freem(m);
- return;
- }
-
- /*
- * 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) {
- /* APPLE MODIFICATION <cbz@apple.com> - if the packet came in on a proxy sta discovery interface,
- we need to not look up the node by DA of the packet; we need to look up the proxy sta which
- matches the SA. If it's not found yet, drop the packet. */
-#if IEEE80211_PROXYSTA
- if (bif->bif_flags & IFBIF_PROXYSTA_DISCOVER)
- {
- struct bridge_rtnode *brt;
- dst_if = NULL;
- brt = bridge_rtnode_lookup(sc, eh->ether_shost);
- if (brt) {
- dst_if = brt->brt_ifp_proxysta;
- }
- if (dst_if == NULL) {
- m_freem(m);
- return;
- }
- }
- else
-#endif
- dst_if = bridge_rtlookup(sc, eh->ether_dhost);
- if (src_if == dst_if) {
- m_freem(m);
- return;
- }
- } else {
- /* ...forward it to all interfaces. */
- sc->sc_if->if_imcasts++;
- dst_if = NULL;
- }
-
- /* APPLE MODIFICATION
- <rnewberry@apple.com> - this is now handled by bridge_input
- <cbz@apple.com> - turning this back on because all packets are not bpf_mtap'd
- equally. RSN Preauth were not getting through; we're
- conditionalizing this call on
- (eh->ether_type == htons(ETHERTYPE_RSN_PREAUTH))
- */
-#if 1
- if (eh->ether_type == htons(ETHERTYPE_RSN_PREAUTH))
- {
- m->m_pkthdr.rcvif = sc->sc_if;
-#if NBPFILTER > 0
- if (sc->sc_bpf_input)
- bridge_bpf_input(sc->sc_if, m);
-#endif
- }
-#endif
-
- if (dst_if == NULL) {
-
-#if APPLE_BRIDGE_HWCKSUM_SUPPORT
- /*
- * Clear any in-bound checksum flags for this packet.
- */
- m->m_pkthdr.csum_flags = 0;
-#else
- mbuf_inbound_modified(m);
-#endif
-
- bridge_broadcast(sc, src_if, m, 1);
- return;
- }
-
- /*
- * At this point, we're dealing with a unicast frame
- * going to a different interface.
- */
- if ((ifnet_flags(dst_if) & IFF_RUNNING) == 0) {
- m_freem(m);
- return;
- }
- bif = bridge_lookup_member_if(sc, dst_if);
- if (bif == NULL) {
- /* Not a member of the bridge (anymore?) */
- m_freem(m);
- return;
- }
-
- if (bif->bif_flags & IFBIF_STP) {
- switch (bif->bif_state) {
- case BSTP_IFSTATE_DISABLED:
- case BSTP_IFSTATE_BLOCKING:
- m_freem(m);
- return;
- }
- }
-
-#if APPLE_BRIDGE_HWCKSUM_SUPPORT
- /*
- * Clear any in-bound checksum flags for this packet.
- */
- {
- m->m_pkthdr.csum_flags = 0;
- }
-#else
- mbuf_inbound_modified(m);
-#endif
-
- bridge_enqueue(sc, dst_if, m);
-}
-
-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;
-}
-
-/*
- * bridge_input:
- *
- * Receive input from a member interface. Queue the packet for
- * bridging if it is not for us.
- */
-errno_t
-bridge_input(struct bridge_iflist *bif, struct ifnet *ifp, struct mbuf *m, void *frame_header)
-{
- struct ifnet *bifp;
- struct ether_header *eh;
- struct mbuf *mc;
- int is_for_us = 0;
- struct bridge_softc *sc = bif->bif_sc;
- struct bridge_iflist *brm;
-
-#if BRIDGE_DEBUG
- if (_if_brige_debug)
- printf("bridge_input: %s%d from %s%d m %p data %p\n",
- ifnet_name(sc->sc_if), ifnet_unit(sc->sc_if),
- ifnet_name(ifp), ifnet_unit(ifp),
- m, mbuf_data(m));
-#endif /* BRIDGE_DEBUG */
-
- if ((ifnet_flags(sc->sc_if) & IFF_RUNNING) == 0) {
-#if BRIDGE_DEBUG
- if (_if_brige_debug)
- printf( "bridge_input: %s%d not running passing along\n",
- ifnet_name(sc->sc_if), ifnet_unit(sc->sc_if));
-#endif /* BRIDGE_DEBUG */
- return 0;
- }
-
- /* 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);
-
- lck_mtx_lock(sc->sc_mtx);
-
- bifp = sc->sc_if;
-
- /* Is it a good idea to reassign a new value to bif ? TBD */
- bif = bridge_lookup_member_if(sc, ifp);
- if (bif == NULL) {
- lck_mtx_unlock(sc->sc_mtx);
-#if BRIDGE_DEBUG
- if (_if_brige_debug)
- printf( "bridge_input: %s%d bridge_lookup_member_if failed\n",
- ifnet_name(sc->sc_if), ifnet_unit(sc->sc_if));
-#endif /* BRIDGE_DEBUG */
- return 0;
- }
-
- eh = (struct ether_header *)mbuf_data(m);
-
- /*
- * 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) {
-
- /* 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,
- ifp, 0, IFBAF_DYNAMIC);
- }
-
-#if NBPFILTER > 0
- if (sc->sc_bpf_input)
- bridge_bpf_input(bifp, m);
-#endif
-
- (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);
-
- lck_mtx_unlock(sc->sc_mtx);
-
-#if BRIDGE_DEBUG
- if (_if_brige_debug)
- printf( "bridge_input: %s%d packet for bridge\n",
- ifnet_name(sc->sc_if), ifnet_unit(sc->sc_if));
-#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) {
- /* APPLE MODIFICATION <cbz@apple.com> - add support for Proxy STA */
-#if IEEE80211_PROXYSTA
- if ((bif->bif_flags & IFBIF_PROXYSTA) == 0) {
-#endif
-
-#ifdef VERY_VERY_VERY_DIAGNOSTIC
- printf("bridge_input: not forwarding packet bound for member interface\n" );
-#endif
- lck_mtx_unlock(sc->sc_mtx);
- return 0;
- /* APPLE MODIFICATION <cbz@apple.com> - add support for Proxy STA */
-#if IEEE80211_PROXYSTA
- }
-#if VERY_VERY_VERY_DIAGNOSTIC
- else {
- printf( "%s: pkt rx on %s [proxysta iface], da is %02x:%02x:%02x:%02x:%02x:%02x\n",
- __func__, ifp->if_xname, 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
-#endif
- }
-
- if ((m->m_flags & (M_BCAST|M_MCAST))) {
- struct ifmultiaddr *ifma = NULL;
-
- if ((m->m_flags & M_BCAST)) {
- is_for_us = 1;
- } else {
-#if BRIDGE_DEBUG
- 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]);
-
- for (ifma = bifp->if_multiaddrs.lh_first; ifma;
- ifma = ifma->ifma_link.le_next) {
-
- if (ifma->ifma_addr == NULL)
- printf(" <none> ");
- else if (ifma->ifma_addr->sa_family == AF_INET) {
- struct sockaddr_in *sin = (struct sockaddr_in *)ifma->ifma_addr;
-
- printf(" %u.%u.%u.%u ",
- (sin->sin_addr.s_addr & 0xff000000) >> 24,
- (sin->sin_addr.s_addr & 0x00ff0000) >> 16,
- (sin->sin_addr.s_addr & 0x0000ff00) >> 8,
- (sin->sin_addr.s_addr & 0x000000ff));
- }
- if (!ifma->ifma_ll || !ifma->ifma_ll->ifma_addr)
- printf("<none>\n");
- else {
- struct sockaddr_dl *sdl = (struct sockaddr_dl *)ifma->ifma_ll->ifma_addr;
-
- printf("%02x:%02x:%02x:%02x:%02x:%02x\n",
- CONST_LLADDR(sdl)[0], CONST_LLADDR(sdl)[1], CONST_LLADDR(sdl)[2],
- CONST_LLADDR(sdl)[3], CONST_LLADDR(sdl)[4], CONST_LLADDR(sdl)[5]);
-
- }
- }
-#endif /* BRIDGE_DEBUG */
-
- /*
- * the upper layer of the stack have attached a list of multicast addresses to the bridge itself
- * (for example, the IP stack has bound 01:00:5e:00:00:01 to the 224.0.0.1 all hosts address), since
- * the IP stack is bound to the bridge. so we need to see if the packets arriving here SHOULD be
- * passed up as coming from the bridge.
- *
- * furthermore, since we know the IP stack is attached to the bridge, and NOTHING is attached
- * to the underlying devices themselves, we can drop packets that don't need to go up (by returning NULL
- * from bridge_input to the caller) after we forward the packet to other interfaces
- */
-
- for (ifma = bifp->if_multiaddrs.lh_first; ifma;
- ifma = ifma->ifma_link.le_next) {
- if (ifma->ifma_ll && ifma->ifma_ll->ifma_addr) {
- struct sockaddr_dl *sdl = (struct sockaddr_dl *)ifma->ifma_ll->ifma_addr;
-
- if (memcmp(eh->ether_dhost, CONST_LLADDR(sdl), ETHER_ADDR_LEN) == 0)
- break;
- }
- }
- if (ifma != NULL) {
- /* this packet matches the bridge's own filter, so pass it up as coming from us */
-
- /* Mark the packet as arriving on the bridge interface */
- // don't do this until AFTER we forward the packet -- bridge_forward uses this information
- //m->m_pkthdr.rcvif = bifp;
-
- /* keep track of this to help us decide about forwarding */
- is_for_us = 1;
-
-#if BRIDGE_DEBUG
- char addr[sizeof("XX:XX:XX:XX:XX:XX")+1];
- printf( "bridge_input: multicast frame for us (%s)\n",
- ether_ntop(addr, sizeof(addr), eh->ether_dhost) );
-#endif
- } else {
-#if BRIDGE_DEBUG
- char addr[sizeof("XX:XX:XX:XX:XX:XX")+1];
- printf( "bridge_input: multicast frame for unbound address (%s), forwarding but not passing to stack\n",
- ether_ntop(addr, sizeof(addr), eh->ether_dhost) );
-#endif
- }
- }
- /* Tap off 802.1D packets; they do not get forwarded. */
- if (memcmp(eh->ether_dhost, bstp_etheraddr,
- ETHER_ADDR_LEN) == 0) {
- m = bstp_input(sc, ifp, m);
- if (m == NULL) {
- lck_mtx_unlock(sc->sc_mtx);
-#if BRIDGE_DEBUG
- if (_if_brige_debug)
- printf( "bridge_input: %s%d mcast BSTP not forwarded\n",
- ifnet_name(sc->sc_if), ifnet_unit(sc->sc_if));
-#endif /* BRIDGE_DEBUG */
- return EJUSTRETURN;
- }
- }
-
- if (bif->bif_flags & IFBIF_STP) {
- switch (bif->bif_state) {
- case BSTP_IFSTATE_BLOCKING:
- case BSTP_IFSTATE_LISTENING:
- case BSTP_IFSTATE_DISABLED:
- {
- lck_mtx_unlock(sc->sc_mtx);
-
-#if BRIDGE_DEBUG
- if (_if_brige_debug)
- printf( "bridge_input: %s%d mcast bridge not learning or forwarding \n",
- ifnet_name(sc->sc_if), ifnet_unit(sc->sc_if));
-#endif /* BRIDGE_DEBUG */
-
- m_freem(m);
- return EJUSTRETURN;
- }
- }
- }
-
- /*
- * 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,
- ifp, 0, IFBAF_DYNAMIC);
- }
-
- if (is_for_us) {
- /*
- * 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_NOWAIT);
- if (mc == NULL) {
-#ifdef DIAGNOSTIC
- printf( "bridge_input: failed to duplicate multicast frame, not forwarding\n" );
-#endif
-#if BRIDGE_DEBUG
- } else {
- if (_if_brige_debug) {
- printf_mbuf(mc, "mc for us: ", "\n");
- printf_mbuf_data(m, 0, 20);
- printf("\n");
- }
-#endif /* BRIDGE_DEBUG */
- }
- } else {
- /*
- * we'll just pass the original, since we don't need to pass it
- * up the stack
- */
- mc = m;
- }
-
- /* Perform the bridge forwarding function with the copy. */
- if (mc != NULL) {
-#if BRIDGE_DEBUG
- if (_if_brige_debug)
- printf( "bridge_input: %s%d mcast forwarding \n",
- ifnet_name(sc->sc_if), ifnet_unit(sc->sc_if));
-#endif /* BRIDGE_DEBUG */
- bridge_forward(sc, mc);
- }
-
- // TBD should have an option for type of bridge
-#if 0
- /*
- * 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.
- */
- if (bifp->if_bridge != NULL)
- panic("brige_input: brige %p in a bridge %p\n", bifp, bifp->if_bridge);
- mc = m_dup(m, M_NOWAIT);
- if (mc != NULL) {
- mc->m_pkthdr.rcvif = bifp;
-#if NBPFILTER > 0
- if (sc->sc_bpf_input)
- bridge_bpf_input(bifp, mc);
-#endif
- }
-#endif
- /* Return the original packet for local processing. */
- if ( !is_for_us )
- {
- /* we don't free the packet -- bridge_forward already did so */
- lck_mtx_unlock(sc->sc_mtx);
-
-#if BRIDGE_DEBUG
- if (_if_brige_debug)
- printf( "bridge_input: %s%d mcast local processing\n",
- ifnet_name(sc->sc_if), ifnet_unit(sc->sc_if));
-#endif
-
- return EJUSTRETURN;
- }
-
- // mark packet as arriving on the bridge
- m->m_pkthdr.rcvif = bifp;
- m->m_pkthdr.header = mbuf_data(m);
-
-#if NBPFILTER > 0
- if (sc->sc_bpf_input)
- bridge_bpf_input(bifp, m);
-#endif
- (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);
-
- lck_mtx_unlock(sc->sc_mtx);
-
-#if BRIDGE_DEBUG
- if (_if_brige_debug)
- printf( "bridge_input: %s%d mcast for us\n",
- ifnet_name(sc->sc_if), ifnet_unit(sc->sc_if));
-#endif /* BRIDGE_DEBUG */
-
- dlil_input_packet_list(bifp, m);
-
- return EJUSTRETURN;
- }
-
- if (bif->bif_flags & IFBIF_STP) {
- switch (bif->bif_state) {
- case BSTP_IFSTATE_BLOCKING:
- case BSTP_IFSTATE_LISTENING:
- case BSTP_IFSTATE_DISABLED:
- lck_mtx_unlock(sc->sc_mtx);
-
-#if BRIDGE_DEBUG
- if (_if_brige_debug)
- printf( "bridge_input: %s%d ucast bridge not learning or forwarding \n",
- ifnet_name(sc->sc_if), ifnet_unit(sc->sc_if));
-#endif /* BRIDGE_DEBUG */
-
- m_freem(m);
- return EJUSTRETURN;
- }
- }
-
- /* this code is not needed for Apple's bridge where the stack attaches directly */
-#if 1 /* TBD should be an option */
- /*
- * Unicast. Make sure it's not for us.
- */
- LIST_FOREACH(brm, &sc->sc_iflist, bif_next) {
- if(ifnet_type(brm->bif_ifp) != IFT_ETHER)
- continue;
-
- /* It is destined for us. */
- if (memcmp(ifnet_lladdr(brm->bif_ifp), eh->ether_dhost,
- ETHER_ADDR_LEN) == 0) {
- if (brm->bif_flags & IFBIF_LEARNING)
- (void) bridge_rtupdate(sc,
- eh->ether_shost, ifp, 0, IFBAF_DYNAMIC);
- m->m_pkthdr.rcvif = brm->bif_ifp;
- m->m_pkthdr.header = mbuf_data(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);
-#if BRIDGE_SUPPORT_GIF
-#if NGIF > 0
- if (ifnet_type(ifp) == IFT_GIF) {
- m->m_flags |= M_PROTO1;
- m->m_pkthdr.rcvif = brm->bif_ifp;
- (*brm->bif_ifp->if_input)(brm->bif_ifp, m);
- m = NULL;
- }
-#endif
-#endif
- lck_mtx_unlock(sc->sc_mtx);
-
-#if BRIDGE_DEBUG
- if (_if_brige_debug)
- printf( "bridge_input: %s%d ucast to member %s%d\n",
- ifnet_name(sc->sc_if), ifnet_unit(sc->sc_if),
- ifnet_name(brm->bif_ifp), ifnet_unit(brm->bif_ifp));
-#endif /* BRIDGE_DEBUG */
-
- dlil_input_packet_list(brm->bif_ifp, m);
-
- return EJUSTRETURN;
- }
-
- /* We just received a packet that we sent out. */
- if (memcmp(ifnet_lladdr(brm->bif_ifp), eh->ether_shost,
- ETHER_ADDR_LEN) == 0) {
- lck_mtx_unlock(sc->sc_mtx);
-
-#if BRIDGE_DEBUG
- if (_if_brige_debug)
- printf( "bridge_input: %s%d ucast drop packet we sent out\n",
- ifnet_name(sc->sc_if), ifnet_unit(sc->sc_if));
-#endif /* BRIDGE_DEBUG */
-
- m_freem(m);
- return EJUSTRETURN;
- }
- }
-#endif
-
- /*
- * 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,
- ifp, 0, IFBAF_DYNAMIC);
- }
-
- /* Perform the bridge forwarding function. */
-#if BRIDGE_DEBUG
- if (_if_brige_debug)
- printf( "bridge_input: %s%d ucast forwarding\n",
- ifnet_name(sc->sc_if), ifnet_unit(sc->sc_if));
-#endif /* BRIDGE_DEBUG */
-
- bridge_forward(sc, m);
- lck_mtx_unlock(sc->sc_mtx);
- 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.
- */
-static void
-bridge_broadcast(struct bridge_softc *sc, struct ifnet *src_if,
- struct mbuf *m, __unused int runfilt)
-{
- struct bridge_iflist *bif;
- struct mbuf *mc;
- struct ifnet *dst_if;
- int used = 0;
-
- lck_mtx_assert(sc->sc_mtx, LCK_MTX_ASSERT_OWNED);
-
- LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
- dst_if = bif->bif_ifp;
- if (dst_if == src_if)
- continue;
-
- if (bif->bif_flags & IFBIF_STP) {
- switch (bif->bif_state) {
- case BSTP_IFSTATE_BLOCKING:
- case BSTP_IFSTATE_DISABLED:
- continue;
- }
- }
-
- if ((bif->bif_flags & IFBIF_DISCOVER) == 0 &&
- (m->m_flags & (M_BCAST|M_MCAST)) == 0)
- continue;
-
- if ((ifnet_flags(dst_if) & IFF_RUNNING) == 0)
- continue;
-
- if (LIST_NEXT(bif, bif_next) == NULL) {
- mc = m;
- used = 1;
- } else {
- mc = m_copym(m, 0, M_COPYALL, M_DONTWAIT);
- if (mc == NULL) {
- (void) ifnet_stat_increment_out(sc->sc_if, 0, 0, 1);
- continue;
- }
- }
-
- bridge_enqueue(sc, dst_if, mc);
- }
- if (used == 0)
- m_freem(m);
-}
-
-/*
- * bridge_rtupdate:
- *
- * Add a bridge routing entry.
- */
-static int
-bridge_rtupdate(struct bridge_softc *sc, const uint8_t *dst,
- struct ifnet *dst_if, int setflags, uint8_t flags)
-{
- struct bridge_rtnode *brt;
- int error;
- /* APPLE MODIFICATION <cbz@apple.com> - add support for Proxy STA */
-#if IEEE80211_PROXYSTA
- struct bridge_iflist *bif;
- int is_pds; /* are we a proxy sta discovery interface? */
-#endif
- struct timespec now;
-
- /* APPLE MODIFICATION <cbz@apple.com> - add support for Proxy STA - is this an interface
- we want to do proxy sta discovery on? */
-#if IEEE80211_PROXYSTA
- bif = bridge_lookup_member_if(sc, dst_if);
- if ((bif) && (bif->bif_flags & IFBIF_PROXYSTA_DISCOVER)) {
- is_pds = 1;
- }
- else {
- is_pds = 0;
- }
-#endif
- /*
- * A route for this destination might already exist. If so,
- * update it, otherwise create a new one.
- */
- if ((brt = bridge_rtnode_lookup(sc, dst)) == NULL) {
- /* APPLE MODIFICATION <cbz@apple.com> - add support for Proxy STA */
-#if IEEE80211_PROXYSTA
- /* don't count this address against the bridge cache (well, allow proxy stas to double that
- number...put *some* boundary on it.) if we are a proxy sta discovery interface */
- if (is_pds) {
- if (sc->sc_brtcnt >= (sc->sc_brtmax+sc->sc_brtmax_proxysta))
- return (ENOSPC);
- }
- else
-#endif
- if (sc->sc_brtcnt >= sc->sc_brtmax)
- 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);
-
- memset(brt, 0, sizeof(*brt));
- nanouptime(&now);
- brt->brt_expire = now.tv_sec + sc->sc_brttimeout;
- brt->brt_flags = IFBAF_DYNAMIC;
- memcpy(brt->brt_addr, dst, ETHER_ADDR_LEN);
-
- /* APPLE MODIFICATION <cbz@apple.com> - add support for Proxy STA - is this an interface
- we want to do proxy sta discovery on? If so, post a monitoring event */
-#if IEEE80211_PROXYSTA
- if (is_pds) {
- brt->brt_flags_ext |= IFBAF_EXT_PROXYSTA;
-#if DIAGNOSTIC
- printf( "%s: proxysta %02x:%02x:%02x:%02x:%02x:%02x on %s; discovery\n",
- __func__, dst[0], dst[1], dst[2], dst[3], dst[4], dst[5], dst_if->if_xname );
-#endif
- bridge_proxysta_discover( dst_if, dst );
- }
-#endif
-
- if ((error = bridge_rtnode_insert(sc, brt)) != 0) {
- zfree(bridge_rtnode_pool, brt);
- return (error);
- }
- }
-
- brt->brt_ifp = dst_if;
- if (setflags) {
- brt->brt_flags = flags;
- brt->brt_expire = (flags & IFBAF_STATIC) ? 0 :
- now.tv_sec + sc->sc_brttimeout;
- }
-
- /* APPLE MODIFICATION <cbz@apple.com> - add support for Proxy STA - */
-#if IEEE80211_PROXYSTA
- if (is_pds) {
-#if VERY_VERY_DIAGNOSTIC
- printf( "%s: proxysta %02x:%02x:%02x:%02x:%02x:%02x on %s; reset timeout\n",
- __func__, dst[0], dst[1], dst[2], dst[3], dst[4], dst[5], dst_if->if_xname );
-#endif
- brt->brt_expire = (flags & IFBAF_STATIC) ? 0 :
- now.tv_sec + sc->sc_brttimeout;
- }
-#endif
-
- return (0);
-}
-
-/*
- * bridge_rtlookup:
- *
- * Lookup the destination interface for an address.
- */
-static struct ifnet *
-bridge_rtlookup(struct bridge_softc *sc, const uint8_t *addr)
-{
- struct bridge_rtnode *brt;
-
- if ((brt = bridge_rtnode_lookup(sc, addr)) == 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;
-
- /* 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;
-
- for (brt = LIST_FIRST(&sc->sc_rtlist); brt != NULL; brt = nbrt) {
- nbrt = LIST_NEXT(brt, brt_list);
- 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;
- struct timespec ts;
-
- lck_mtx_lock(sc->sc_mtx);
-
- bridge_rtage(sc);
-
- lck_mtx_unlock(sc->sc_mtx);
-
- if (ifnet_flags(sc->sc_if) & IFF_RUNNING) {
- 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;
- struct timespec now;
-
- nanouptime(&now);
-
- for (brt = LIST_FIRST(&sc->sc_rtlist); brt != NULL; brt = nbrt) {
- nbrt = LIST_NEXT(brt, brt_list);
- if ((brt->brt_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC) {
- 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;
-
- for (brt = LIST_FIRST(&sc->sc_rtlist); brt != NULL; brt = nbrt) {
- nbrt = LIST_NEXT(brt, brt_list);
- if (full || (brt->brt_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC)
- bridge_rtnode_destroy(sc, brt);
- }
-}
-
-/* APPLE MODIFICATION <cbz@apple.com> - add support for Proxy STA */
-#if IEEE80211_PROXYSTA
-/*
- * bridge_rtdiscovery:
- *
- */
-static void
-bridge_rtdiscovery(struct bridge_softc *sc)
-{
- struct bridge_rtnode *brt, *nbrt;
- struct bridge_iflist *bif;
-
- for (brt = LIST_FIRST(&sc->sc_rtlist); brt != NULL; brt = nbrt) {
- nbrt = LIST_NEXT(brt, brt_list);
- bif = bridge_lookup_member_if(sc, brt->brt_ifp);
- if ((bif) && (bif->bif_flags & IFBIF_PROXYSTA_DISCOVER) &&
- ((brt->brt_flags_ext & IFBAF_EXT_PROXYSTA) == 0)) {
-#if DIAGNOSTIC
- printf( "%s: proxysta %02x:%02x:%02x:%02x:%02x:%02x on %s; found before IFBIF_PROXYSTA_DISCOVER\n",
- __func__, brt->brt_addr[0], brt->brt_addr[1], brt->brt_addr[2], brt->brt_addr[3],
- brt->brt_addr[4], brt->brt_addr[5], brt->brt_ifp->if_xname );
-#endif
- brt->brt_flags_ext |= IFBAF_EXT_PROXYSTA;
- }
-
- if (brt->brt_ifp_proxysta == NULL) {
-#if DIAGNOSTIC
- printf( "%s: proxysta %02x:%02x:%02x:%02x:%02x:%02x on %s; discovery\n",
- __func__, brt->brt_addr[0], brt->brt_addr[1], brt->brt_addr[2], brt->brt_addr[3],
- brt->brt_addr[4], brt->brt_addr[5], brt->brt_ifp->if_xname );
-#endif
- bridge_proxysta_discover( brt->brt_ifp, brt->brt_addr );
- }
- }
-}
-
-/*
- * bridge_rtpurge:
- *
- * Remove all dynamic addresses from a specific interface on the bridge.
- */
-static void
-bridge_rtpurge(struct bridge_softc *sc, struct ifnet *ifs)
-{
- struct bridge_rtnode *brt, *nbrt;
-
- for (brt = LIST_FIRST(&sc->sc_rtlist); brt != NULL; brt = nbrt) {
- nbrt = LIST_NEXT(brt, brt_list);
- if (brt->brt_ifp == ifs) {
-#if DIAGNOSTIC
- printf( "%s: purge %s [%02x:%02x:%02x:%02x:%02x:%02x] discovered on %s\n",
- __func__, brt->brt_ifp_proxysta ? brt->brt_ifp_proxysta->if_xname : brt->brt_ifp->if_xname,
- brt->brt_addr[0], brt->brt_addr[1], brt->brt_addr[2],
- brt->brt_addr[3], brt->brt_addr[4], brt->brt_addr[5], brt->brt_ifp->if_xname );
-#endif
- bridge_rtnode_destroy(sc, brt);
- }
- }
-}
-#endif
-
-/*
- * bridge_rtdaddr:
- *
- * Remove an address from the table.
- */
-static int
-bridge_rtdaddr(struct bridge_softc *sc, const uint8_t *addr)
-{
- struct bridge_rtnode *brt;
-
- if ((brt = bridge_rtnode_lookup(sc, addr)) == NULL)
- return (ENOENT);
-
- bridge_rtnode_destroy(sc, brt);
- return (0);
-}
-
-/*
- * bridge_rtdelete:
- *
- * Delete routes to a speicifc member interface.
- */
-__private_extern__ void
-bridge_rtdelete(struct bridge_softc *sc, struct ifnet *ifp, int full)
-{
- struct bridge_rtnode *brt, *nbrt;
-
- for (brt = LIST_FIRST(&sc->sc_rtlist); brt != NULL; brt = nbrt) {
- nbrt = LIST_NEXT(brt, brt_list);
- 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_WAITOK);
- 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)
-{
-
- _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 uint32_t
-bridge_rthash(__unused struct bridge_softc *sc, const uint8_t *addr)
-{
- /* APPLE MODIFICATION - wasabi performance improvment - simplify the hash algorithm */
-#if 0
- 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);
-#else
- return addr[5];
-#endif
-}
-
-#undef mix
-
-/*
- * bridge_rtnode_lookup:
- *
- * Look up a bridge route node for the specified destination.
- */
-static struct bridge_rtnode *
-bridge_rtnode_lookup(struct bridge_softc *sc, const uint8_t *addr)
-{
- struct bridge_rtnode *brt;
- uint32_t hash;
- int dir;
-
- hash = bridge_rthash(sc, addr);
- LIST_FOREACH(brt, &sc->sc_rthash[hash], brt_hash) {
- dir = memcmp(addr, brt->brt_addr, ETHER_ADDR_LEN);
- if (dir == 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;
-
- 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 = memcmp(brt->brt_addr, lbrt->brt_addr, ETHER_ADDR_LEN);
- if (dir == 0)
- 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)
-{
- lck_mtx_assert(sc->sc_mtx, LCK_MTX_ASSERT_OWNED);
-
- /* APPLE MODIFICATION <cbz@apple.com> - add support for Proxy STA */
-#if IEEE80211_PROXYSTA
- if (brt->brt_flags_ext & IFBAF_EXT_PROXYSTA) {
-#if DIAGNOSTIC
- printf( "%s: proxysta %02x:%02x:%02x:%02x:%02x:%02x %s from %s; idle timeout\n",
- __func__, brt->brt_addr[0], brt->brt_addr[1], brt->brt_addr[2],
- brt->brt_addr[3], brt->brt_addr[4], brt->brt_addr[5],
- brt->brt_ifp_proxysta ? brt->brt_ifp_proxysta->if_xname : "unknown",
- brt->brt_ifp->if_xname );
-#endif
- bridge_proxysta_idle_timeout( brt->brt_ifp, brt->brt_addr );
- }
-#endif
-
- LIST_REMOVE(brt, brt_hash);
-
- LIST_REMOVE(brt, brt_list);
- sc->sc_brtcnt--;
- zfree(bridge_rtnode_pool, brt);
-}
-
-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(__unused ifnet_t ifp)
-{
- struct bridge_softc *sc = (struct bridge_softc *)ifnet_softc(ifp);
-
- /* Tear down the routing table. */
- bridge_rtable_fini(sc);
-
- lck_rw_lock_exclusive(bridge_list_lock);
- LIST_REMOVE(sc, sc_list);
- lck_rw_done(bridge_list_lock);
-
- 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