1550 lines
37 KiB
C
1550 lines
37 KiB
C
/* $NetBSD: if_ethersubr.c,v 1.172 2009/05/29 04:57:04 darran Exp $ */
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/*
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* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1982, 1989, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)if_ethersubr.c 8.2 (Berkeley) 4/4/96
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: if_ethersubr.c,v 1.172 2009/05/29 04:57:04 darran Exp $");
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#include "opt_inet.h"
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#include "opt_atalk.h"
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#include "opt_iso.h"
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#include "opt_ipx.h"
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#include "opt_mbuftrace.h"
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#include "opt_gateway.h"
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#include "opt_pfil_hooks.h"
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#include "opt_pppoe.h"
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#include "vlan.h"
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#include "pppoe.h"
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#include "bridge.h"
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#include "bpfilter.h"
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#include "arp.h"
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#include "agr.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/callout.h>
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#include <sys/malloc.h>
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#include <sys/mbuf.h>
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#include <sys/protosw.h>
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#include <sys/socket.h>
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#include <sys/ioctl.h>
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#include <sys/errno.h>
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#include <sys/syslog.h>
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#include <sys/kauth.h>
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#include <sys/cpu.h>
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#include <sys/intr.h>
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#include <sys/device.h>
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#include <net/if.h>
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#include <net/netisr.h>
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#include <net/route.h>
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#include <net/if_llc.h>
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#include <net/if_dl.h>
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#include <net/if_types.h>
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#include <net/if_media.h>
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#include <dev/mii/mii.h>
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#include <dev/mii/miivar.h>
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#if NARP == 0
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/*
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* XXX there should really be a way to issue this warning from within config(8)
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*/
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#error You have included NETATALK or a pseudo-device in your configuration that depends on the presence of ethernet interfaces, but have no such interfaces configured. Check if you really need pseudo-device bridge, pppoe, vlan or options NETATALK.
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#endif
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#if NBPFILTER > 0
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#include <net/bpf.h>
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#endif
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#include <net/if_ether.h>
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#if NVLAN > 0
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#include <net/if_vlanvar.h>
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#endif
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#if NPPPOE > 0
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#include <net/if_pppoe.h>
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#endif
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#if NAGR > 0
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#include <net/agr/ieee8023_slowprotocols.h> /* XXX */
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#include <net/agr/ieee8023ad.h>
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#include <net/agr/if_agrvar.h>
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#endif
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#if NBRIDGE > 0
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#include <net/if_bridgevar.h>
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#endif
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#include <netinet/in.h>
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#ifdef INET
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#include <netinet/in_var.h>
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#endif
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#include <netinet/if_inarp.h>
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#ifdef INET6
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#ifndef INET
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#include <netinet/in.h>
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#endif
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#include <netinet6/in6_var.h>
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#include <netinet6/nd6.h>
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#endif
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#include "carp.h"
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#if NCARP > 0
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#include <netinet/ip_carp.h>
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#endif
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#ifdef IPX
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#include <netipx/ipx.h>
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#include <netipx/ipx_if.h>
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#endif
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#ifdef ISO
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#include <netiso/argo_debug.h>
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#include <netiso/iso.h>
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#include <netiso/iso_var.h>
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#include <netiso/iso_snpac.h>
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#endif
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#ifdef NETATALK
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#include <netatalk/at.h>
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#include <netatalk/at_var.h>
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#include <netatalk/at_extern.h>
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#define llc_snap_org_code llc_un.type_snap.org_code
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#define llc_snap_ether_type llc_un.type_snap.ether_type
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extern u_char at_org_code[3];
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extern u_char aarp_org_code[3];
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#endif /* NETATALK */
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static struct timeval bigpktppslim_last;
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static int bigpktppslim = 2; /* XXX */
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static int bigpktpps_count;
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const uint8_t etherbroadcastaddr[ETHER_ADDR_LEN] =
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{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
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const uint8_t ethermulticastaddr_slowprotocols[ETHER_ADDR_LEN] =
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{ 0x01, 0x80, 0xc2, 0x00, 0x00, 0x02 };
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#define senderr(e) { error = (e); goto bad;}
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static int ether_output(struct ifnet *, struct mbuf *,
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const struct sockaddr *, struct rtentry *);
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/*
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* Ethernet output routine.
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* Encapsulate a packet of type family for the local net.
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* Assumes that ifp is actually pointer to ethercom structure.
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*/
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static int
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ether_output(struct ifnet *ifp0, struct mbuf *m0, const struct sockaddr *dst,
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struct rtentry *rt0)
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{
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uint16_t etype = 0;
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int error = 0, hdrcmplt = 0;
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uint8_t esrc[6], edst[6];
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struct mbuf *m = m0;
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struct rtentry *rt;
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struct mbuf *mcopy = NULL;
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struct ether_header *eh;
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struct ifnet *ifp = ifp0;
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ALTQ_DECL(struct altq_pktattr pktattr;)
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#ifdef INET
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struct arphdr *ah;
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#endif /* INET */
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#ifdef NETATALK
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struct at_ifaddr *aa;
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#endif /* NETATALK */
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#ifdef MBUFTRACE
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m_claimm(m, ifp->if_mowner);
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#endif
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#if NCARP > 0
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if (ifp->if_type == IFT_CARP) {
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struct ifaddr *ifa;
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/* loop back if this is going to the carp interface */
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if (dst != NULL && ifp0->if_link_state == LINK_STATE_UP &&
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(ifa = ifa_ifwithaddr(dst)) != NULL &&
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ifa->ifa_ifp == ifp0)
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return looutput(ifp0, m, dst, rt0);
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ifp = ifp->if_carpdev;
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/* ac = (struct arpcom *)ifp; */
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if ((ifp0->if_flags & (IFF_UP|IFF_RUNNING)) !=
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(IFF_UP|IFF_RUNNING))
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senderr(ENETDOWN);
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}
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#endif /* NCARP > 0 */
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if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING))
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senderr(ENETDOWN);
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if ((rt = rt0) != NULL) {
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if ((rt->rt_flags & RTF_UP) == 0) {
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if ((rt0 = rt = rtalloc1(dst, 1)) != NULL) {
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rt->rt_refcnt--;
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if (rt->rt_ifp != ifp)
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return (*rt->rt_ifp->if_output)
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(ifp, m0, dst, rt);
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} else
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senderr(EHOSTUNREACH);
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}
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if ((rt->rt_flags & RTF_GATEWAY) && dst->sa_family != AF_NS) {
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if (rt->rt_gwroute == NULL)
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goto lookup;
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if (((rt = rt->rt_gwroute)->rt_flags & RTF_UP) == 0) {
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rtfree(rt); rt = rt0;
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lookup: rt->rt_gwroute = rtalloc1(rt->rt_gateway, 1);
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if ((rt = rt->rt_gwroute) == NULL)
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senderr(EHOSTUNREACH);
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/* the "G" test below also prevents rt == rt0 */
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if ((rt->rt_flags & RTF_GATEWAY) ||
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(rt->rt_ifp != ifp)) {
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rt->rt_refcnt--;
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rt0->rt_gwroute = NULL;
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senderr(EHOSTUNREACH);
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}
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}
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}
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if (rt->rt_flags & RTF_REJECT)
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if (rt->rt_rmx.rmx_expire == 0 ||
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(u_long) time_second < rt->rt_rmx.rmx_expire)
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senderr(rt == rt0 ? EHOSTDOWN : EHOSTUNREACH);
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}
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switch (dst->sa_family) {
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#ifdef INET
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case AF_INET:
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if (m->m_flags & M_BCAST)
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(void)memcpy(edst, etherbroadcastaddr, sizeof(edst));
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else if (m->m_flags & M_MCAST)
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ETHER_MAP_IP_MULTICAST(&satocsin(dst)->sin_addr, edst);
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else if (!arpresolve(ifp, rt, m, dst, edst))
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return (0); /* if not yet resolved */
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/* If broadcasting on a simplex interface, loopback a copy */
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if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX))
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mcopy = m_copy(m, 0, (int)M_COPYALL);
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etype = htons(ETHERTYPE_IP);
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break;
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case AF_ARP:
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ah = mtod(m, struct arphdr *);
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if (m->m_flags & M_BCAST)
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(void)memcpy(edst, etherbroadcastaddr, sizeof(edst));
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else {
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void *tha = ar_tha(ah);
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KASSERT(tha);
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memcpy(edst, tha, sizeof(edst));
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}
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ah->ar_hrd = htons(ARPHRD_ETHER);
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switch (ntohs(ah->ar_op)) {
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case ARPOP_REVREQUEST:
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case ARPOP_REVREPLY:
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etype = htons(ETHERTYPE_REVARP);
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break;
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case ARPOP_REQUEST:
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case ARPOP_REPLY:
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default:
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etype = htons(ETHERTYPE_ARP);
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}
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break;
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#endif
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#ifdef INET6
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case AF_INET6:
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if (!nd6_storelladdr(ifp, rt, m, dst, edst, sizeof(edst))){
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/* something bad happened */
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return (0);
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}
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etype = htons(ETHERTYPE_IPV6);
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break;
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#endif
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#ifdef NETATALK
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case AF_APPLETALK:
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if (!aarpresolve(ifp, m, (const struct sockaddr_at *)dst, edst)) {
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#ifdef NETATALKDEBUG
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printf("aarpresolv failed\n");
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#endif /* NETATALKDEBUG */
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return (0);
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}
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/*
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* ifaddr is the first thing in at_ifaddr
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*/
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aa = (struct at_ifaddr *) at_ifawithnet(
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(const struct sockaddr_at *)dst, ifp);
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if (aa == NULL)
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goto bad;
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/*
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* In the phase 2 case, we need to prepend an mbuf for the
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* llc header. Since we must preserve the value of m,
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* which is passed to us by value, we m_copy() the first
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* mbuf, and use it for our llc header.
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*/
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if (aa->aa_flags & AFA_PHASE2) {
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struct llc llc;
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M_PREPEND(m, sizeof(struct llc), M_DONTWAIT);
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llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP;
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llc.llc_control = LLC_UI;
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memcpy(llc.llc_snap_org_code, at_org_code,
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sizeof(llc.llc_snap_org_code));
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llc.llc_snap_ether_type = htons(ETHERTYPE_ATALK);
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memcpy(mtod(m, void *), &llc, sizeof(struct llc));
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} else {
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etype = htons(ETHERTYPE_ATALK);
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}
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break;
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#endif /* NETATALK */
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#ifdef IPX
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case AF_IPX:
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etype = htons(ETHERTYPE_IPX);
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memcpy(edst,
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&(((const struct sockaddr_ipx *)dst)->sipx_addr.x_host),
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sizeof(edst));
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/* If broadcasting on a simplex interface, loopback a copy */
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if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX))
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mcopy = m_copy(m, 0, (int)M_COPYALL);
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break;
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#endif
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#ifdef ISO
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case AF_ISO: {
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int snpalen;
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struct llc *l;
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const struct sockaddr_dl *sdl;
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if (rt && (sdl = satocsdl(rt->rt_gateway)) &&
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sdl->sdl_family == AF_LINK && sdl->sdl_alen > 0) {
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memcpy(edst, CLLADDR(sdl), sizeof(edst));
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} else {
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error = iso_snparesolve(ifp,
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(const struct sockaddr_iso *)dst,
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(char *)edst, &snpalen);
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if (error)
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goto bad; /* Not Resolved */
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}
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/* If broadcasting on a simplex interface, loopback a copy */
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if (*edst & 1)
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m->m_flags |= (M_BCAST|M_MCAST);
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if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX) &&
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(mcopy = m_copy(m, 0, (int)M_COPYALL))) {
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M_PREPEND(mcopy, sizeof (*eh), M_DONTWAIT);
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if (mcopy) {
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eh = mtod(mcopy, struct ether_header *);
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memcpy(eh->ether_dhost, edst, sizeof(edst));
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memcpy(eh->ether_shost, CLLADDR(ifp->if_sadl),
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sizeof(edst));
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}
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}
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M_PREPEND(m, 3, M_DONTWAIT);
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if (m == NULL)
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return (0);
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l = mtod(m, struct llc *);
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l->llc_dsap = l->llc_ssap = LLC_ISO_LSAP;
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l->llc_control = LLC_UI;
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#ifdef ARGO_DEBUG
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if (argo_debug[D_ETHER]) {
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int i;
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printf("unoutput: sending pkt to: ");
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for (i=0; i<6; i++)
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printf("%x ", edst[i] & 0xff);
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printf("\n");
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}
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#endif
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} break;
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#endif /* ISO */
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|
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case pseudo_AF_HDRCMPLT:
|
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hdrcmplt = 1;
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memcpy(esrc,
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((const struct ether_header *)dst->sa_data)->ether_shost,
|
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sizeof(esrc));
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/* FALLTHROUGH */
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|
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case AF_UNSPEC:
|
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memcpy(edst,
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((const struct ether_header *)dst->sa_data)->ether_dhost,
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sizeof(edst));
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/* AF_UNSPEC doesn't swap the byte order of the ether_type. */
|
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etype = ((const struct ether_header *)dst->sa_data)->ether_type;
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break;
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default:
|
|
printf("%s: can't handle af%d\n", ifp->if_xname,
|
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dst->sa_family);
|
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senderr(EAFNOSUPPORT);
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}
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|
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if (mcopy)
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(void)looutput(ifp, mcopy, dst, rt);
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/* If no ether type is set, this must be a 802.2 formatted packet.
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*/
|
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if (etype == 0)
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etype = htons(m->m_pkthdr.len);
|
|
/*
|
|
* Add local net header. If no space in first mbuf,
|
|
* allocate another.
|
|
*/
|
|
M_PREPEND(m, sizeof (struct ether_header), M_DONTWAIT);
|
|
if (m == 0)
|
|
senderr(ENOBUFS);
|
|
eh = mtod(m, struct ether_header *);
|
|
/* Note: etype is already in network byte order. */
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|
(void)memcpy(&eh->ether_type, &etype, sizeof(eh->ether_type));
|
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memcpy(eh->ether_dhost, edst, sizeof(edst));
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|
if (hdrcmplt)
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memcpy(eh->ether_shost, esrc, sizeof(eh->ether_shost));
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|
else
|
|
memcpy(eh->ether_shost, CLLADDR(ifp->if_sadl),
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sizeof(eh->ether_shost));
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|
|
|
#if NCARP > 0
|
|
if (ifp0 != ifp && ifp0->if_type == IFT_CARP) {
|
|
memcpy(eh->ether_shost, CLLADDR(ifp0->if_sadl),
|
|
sizeof(eh->ether_shost));
|
|
}
|
|
#endif /* NCARP > 0 */
|
|
|
|
#ifdef PFIL_HOOKS
|
|
if ((error = pfil_run_hooks(&ifp->if_pfil, &m, ifp, PFIL_OUT)) != 0)
|
|
return (error);
|
|
if (m == NULL)
|
|
return (0);
|
|
#endif
|
|
|
|
#if NBRIDGE > 0
|
|
/*
|
|
* Bridges require special output handling.
|
|
*/
|
|
if (ifp->if_bridge)
|
|
return (bridge_output(ifp, m, NULL, NULL));
|
|
#endif
|
|
|
|
#if NCARP > 0
|
|
if (ifp != ifp0)
|
|
ifp0->if_obytes += m->m_pkthdr.len + ETHER_HDR_LEN;
|
|
#endif /* NCARP > 0 */
|
|
|
|
#ifdef ALTQ
|
|
/*
|
|
* If ALTQ is enabled on the parent interface, do
|
|
* classification; the queueing discipline might not
|
|
* require classification, but might require the
|
|
* address family/header pointer in the pktattr.
|
|
*/
|
|
if (ALTQ_IS_ENABLED(&ifp->if_snd))
|
|
altq_etherclassify(&ifp->if_snd, m, &pktattr);
|
|
#endif
|
|
|
|
return ifq_enqueue(ifp, m ALTQ_COMMA ALTQ_DECL(&pktattr));
|
|
|
|
bad:
|
|
if (m)
|
|
m_freem(m);
|
|
return (error);
|
|
}
|
|
|
|
#ifdef ALTQ
|
|
/*
|
|
* This routine is a slight hack to allow a packet to be classified
|
|
* if the Ethernet headers are present. It will go away when ALTQ's
|
|
* classification engine understands link headers.
|
|
*/
|
|
void
|
|
altq_etherclassify(struct ifaltq *ifq, struct mbuf *m,
|
|
struct altq_pktattr *pktattr)
|
|
{
|
|
struct ether_header *eh;
|
|
uint16_t ether_type;
|
|
int hlen, af, hdrsize;
|
|
void *hdr;
|
|
|
|
hlen = ETHER_HDR_LEN;
|
|
eh = mtod(m, struct ether_header *);
|
|
|
|
ether_type = htons(eh->ether_type);
|
|
|
|
if (ether_type < ETHERMTU) {
|
|
/* LLC/SNAP */
|
|
struct llc *llc = (struct llc *)(eh + 1);
|
|
hlen += 8;
|
|
|
|
if (m->m_len < hlen ||
|
|
llc->llc_dsap != LLC_SNAP_LSAP ||
|
|
llc->llc_ssap != LLC_SNAP_LSAP ||
|
|
llc->llc_control != LLC_UI) {
|
|
/* Not SNAP. */
|
|
goto bad;
|
|
}
|
|
|
|
ether_type = htons(llc->llc_un.type_snap.ether_type);
|
|
}
|
|
|
|
switch (ether_type) {
|
|
case ETHERTYPE_IP:
|
|
af = AF_INET;
|
|
hdrsize = 20; /* sizeof(struct ip) */
|
|
break;
|
|
|
|
case ETHERTYPE_IPV6:
|
|
af = AF_INET6;
|
|
hdrsize = 40; /* sizeof(struct ip6_hdr) */
|
|
break;
|
|
|
|
default:
|
|
af = AF_UNSPEC;
|
|
hdrsize = 0;
|
|
break;
|
|
}
|
|
|
|
while (m->m_len <= hlen) {
|
|
hlen -= m->m_len;
|
|
m = m->m_next;
|
|
}
|
|
if (m->m_len < (hlen + hdrsize)) {
|
|
/*
|
|
* protocol header not in a single mbuf.
|
|
* We can't cope with this situation right
|
|
* now (but it shouldn't ever happen, really, anyhow).
|
|
*/
|
|
#ifdef DEBUG
|
|
printf("altq_etherclassify: headers span multiple mbufs: "
|
|
"%d < %d\n", m->m_len, (hlen + hdrsize));
|
|
#endif
|
|
goto bad;
|
|
}
|
|
|
|
m->m_data += hlen;
|
|
m->m_len -= hlen;
|
|
|
|
hdr = mtod(m, void *);
|
|
|
|
if (ALTQ_NEEDS_CLASSIFY(ifq))
|
|
pktattr->pattr_class =
|
|
(*ifq->altq_classify)(ifq->altq_clfier, m, af);
|
|
pktattr->pattr_af = af;
|
|
pktattr->pattr_hdr = hdr;
|
|
|
|
m->m_data -= hlen;
|
|
m->m_len += hlen;
|
|
|
|
return;
|
|
|
|
bad:
|
|
pktattr->pattr_class = NULL;
|
|
pktattr->pattr_hdr = NULL;
|
|
pktattr->pattr_af = AF_UNSPEC;
|
|
}
|
|
#endif /* ALTQ */
|
|
|
|
/*
|
|
* Process a received Ethernet packet;
|
|
* the packet is in the mbuf chain m with
|
|
* the ether header.
|
|
*/
|
|
void
|
|
ether_input(struct ifnet *ifp, struct mbuf *m)
|
|
{
|
|
struct ethercom *ec = (struct ethercom *) ifp;
|
|
struct ifqueue *inq;
|
|
uint16_t etype;
|
|
struct ether_header *eh;
|
|
#if defined (ISO) || defined (LLC) || defined(NETATALK)
|
|
struct llc *l;
|
|
#endif
|
|
|
|
if ((ifp->if_flags & IFF_UP) == 0) {
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
|
|
#ifdef MBUFTRACE
|
|
m_claimm(m, &ec->ec_rx_mowner);
|
|
#endif
|
|
eh = mtod(m, struct ether_header *);
|
|
etype = ntohs(eh->ether_type);
|
|
|
|
/*
|
|
* Determine if the packet is within its size limits.
|
|
*/
|
|
if (m->m_pkthdr.len >
|
|
ETHER_MAX_FRAME(ifp, etype, m->m_flags & M_HASFCS)) {
|
|
if (ppsratecheck(&bigpktppslim_last, &bigpktpps_count,
|
|
bigpktppslim)) {
|
|
printf("%s: discarding oversize frame (len=%d)\n",
|
|
ifp->if_xname, m->m_pkthdr.len);
|
|
}
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
|
|
if (ETHER_IS_MULTICAST(eh->ether_dhost)) {
|
|
/*
|
|
* If this is not a simplex interface, drop the packet
|
|
* if it came from us.
|
|
*/
|
|
if ((ifp->if_flags & IFF_SIMPLEX) == 0 &&
|
|
memcmp(CLLADDR(ifp->if_sadl), eh->ether_shost,
|
|
ETHER_ADDR_LEN) == 0) {
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
|
|
if (memcmp(etherbroadcastaddr,
|
|
eh->ether_dhost, ETHER_ADDR_LEN) == 0)
|
|
m->m_flags |= M_BCAST;
|
|
else
|
|
m->m_flags |= M_MCAST;
|
|
ifp->if_imcasts++;
|
|
}
|
|
|
|
/* If the CRC is still on the packet, trim it off. */
|
|
if (m->m_flags & M_HASFCS) {
|
|
m_adj(m, -ETHER_CRC_LEN);
|
|
m->m_flags &= ~M_HASFCS;
|
|
}
|
|
|
|
ifp->if_ibytes += m->m_pkthdr.len;
|
|
|
|
#if NBRIDGE > 0
|
|
/*
|
|
* Tap the packet off here for a bridge. bridge_input()
|
|
* will return NULL if it has consumed the packet, otherwise
|
|
* it gets processed as normal. Note that bridge_input()
|
|
* will always return the original packet if we need to
|
|
* process it locally.
|
|
*/
|
|
if (ifp->if_bridge) {
|
|
/* clear M_PROMISC, in case the packets comes from a vlan */
|
|
m->m_flags &= ~M_PROMISC;
|
|
m = bridge_input(ifp, m);
|
|
if (m == NULL)
|
|
return;
|
|
|
|
/*
|
|
* Bridge has determined that the packet is for us.
|
|
* Update our interface pointer -- we may have had
|
|
* to "bridge" the packet locally.
|
|
*/
|
|
ifp = m->m_pkthdr.rcvif;
|
|
} else
|
|
#endif /* NBRIDGE > 0 */
|
|
{
|
|
|
|
#if NCARP > 0
|
|
if (__predict_false(ifp->if_carp && ifp->if_type != IFT_CARP)) {
|
|
/*
|
|
* clear M_PROMISC, in case the packets comes from a
|
|
* vlan
|
|
*/
|
|
m->m_flags &= ~M_PROMISC;
|
|
if (carp_input(m, (uint8_t *)&eh->ether_shost,
|
|
(uint8_t *)&eh->ether_dhost, eh->ether_type) == 0)
|
|
return;
|
|
}
|
|
#endif /* NCARP > 0 */
|
|
if ((m->m_flags & (M_BCAST|M_MCAST|M_PROMISC)) == 0 &&
|
|
(ifp->if_flags & IFF_PROMISC) != 0 &&
|
|
memcmp(CLLADDR(ifp->if_sadl), eh->ether_dhost,
|
|
ETHER_ADDR_LEN) != 0) {
|
|
m->m_flags |= M_PROMISC;
|
|
}
|
|
}
|
|
|
|
#ifdef PFIL_HOOKS
|
|
if ((m->m_flags & M_PROMISC) == 0) {
|
|
if (pfil_run_hooks(&ifp->if_pfil, &m, ifp, PFIL_IN) != 0)
|
|
return;
|
|
if (m == NULL)
|
|
return;
|
|
|
|
eh = mtod(m, struct ether_header *);
|
|
etype = ntohs(eh->ether_type);
|
|
}
|
|
#endif
|
|
|
|
#if NAGR > 0
|
|
if (ifp->if_agrprivate &&
|
|
__predict_true(etype != ETHERTYPE_SLOWPROTOCOLS)) {
|
|
m->m_flags &= ~M_PROMISC;
|
|
agr_input(ifp, m);
|
|
return;
|
|
}
|
|
#endif /* NAGR > 0 */
|
|
|
|
/*
|
|
* If VLANs are configured on the interface, check to
|
|
* see if the device performed the decapsulation and
|
|
* provided us with the tag.
|
|
*/
|
|
if (ec->ec_nvlans && m_tag_find(m, PACKET_TAG_VLAN, NULL) != NULL) {
|
|
#if NVLAN > 0
|
|
/*
|
|
* vlan_input() will either recursively call ether_input()
|
|
* or drop the packet.
|
|
*/
|
|
vlan_input(ifp, m);
|
|
#else
|
|
m_freem(m);
|
|
#endif
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Handle protocols that expect to have the Ethernet header
|
|
* (and possibly FCS) intact.
|
|
*/
|
|
switch (etype) {
|
|
#if NVLAN > 0
|
|
case ETHERTYPE_VLAN:
|
|
/*
|
|
* vlan_input() will either recursively call ether_input()
|
|
* or drop the packet.
|
|
*/
|
|
if (((struct ethercom *)ifp)->ec_nvlans != 0)
|
|
vlan_input(ifp, m);
|
|
else
|
|
m_freem(m);
|
|
return;
|
|
#endif /* NVLAN > 0 */
|
|
#if NPPPOE > 0
|
|
case ETHERTYPE_PPPOEDISC:
|
|
case ETHERTYPE_PPPOE:
|
|
if (m->m_flags & M_PROMISC) {
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
#ifndef PPPOE_SERVER
|
|
if (m->m_flags & (M_MCAST | M_BCAST)) {
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
#endif
|
|
|
|
if (etype == ETHERTYPE_PPPOEDISC)
|
|
inq = &ppoediscinq;
|
|
else
|
|
inq = &ppoeinq;
|
|
if (IF_QFULL(inq)) {
|
|
IF_DROP(inq);
|
|
m_freem(m);
|
|
} else
|
|
IF_ENQUEUE(inq, m);
|
|
softint_schedule(pppoe_softintr);
|
|
return;
|
|
#endif /* NPPPOE > 0 */
|
|
case ETHERTYPE_SLOWPROTOCOLS: {
|
|
uint8_t subtype;
|
|
|
|
#if defined(DIAGNOSTIC)
|
|
if (m->m_pkthdr.len < sizeof(*eh) + sizeof(subtype)) {
|
|
panic("ether_input: too short slow protocol packet");
|
|
}
|
|
#endif
|
|
m_copydata(m, sizeof(*eh), sizeof(subtype), &subtype);
|
|
switch (subtype) {
|
|
#if NAGR > 0
|
|
case SLOWPROTOCOLS_SUBTYPE_LACP:
|
|
if (ifp->if_agrprivate) {
|
|
ieee8023ad_lacp_input(ifp, m);
|
|
return;
|
|
}
|
|
break;
|
|
|
|
case SLOWPROTOCOLS_SUBTYPE_MARKER:
|
|
if (ifp->if_agrprivate) {
|
|
ieee8023ad_marker_input(ifp, m);
|
|
return;
|
|
}
|
|
break;
|
|
#endif /* NAGR > 0 */
|
|
default:
|
|
if (subtype == 0 || subtype > 10) {
|
|
/* illegal value */
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
/* unknown subtype */
|
|
break;
|
|
}
|
|
/* FALLTHROUGH */
|
|
}
|
|
default:
|
|
if (m->m_flags & M_PROMISC) {
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
}
|
|
|
|
/* If the CRC is still on the packet, trim it off. */
|
|
if (m->m_flags & M_HASFCS) {
|
|
m_adj(m, -ETHER_CRC_LEN);
|
|
m->m_flags &= ~M_HASFCS;
|
|
}
|
|
|
|
if (etype > ETHERMTU + sizeof (struct ether_header)) {
|
|
/* Strip off the Ethernet header. */
|
|
m_adj(m, sizeof(struct ether_header));
|
|
|
|
switch (etype) {
|
|
#ifdef INET
|
|
case ETHERTYPE_IP:
|
|
#ifdef GATEWAY
|
|
if (ipflow_fastforward(m))
|
|
return;
|
|
#endif
|
|
schednetisr(NETISR_IP);
|
|
inq = &ipintrq;
|
|
break;
|
|
|
|
case ETHERTYPE_ARP:
|
|
schednetisr(NETISR_ARP);
|
|
inq = &arpintrq;
|
|
break;
|
|
|
|
case ETHERTYPE_REVARP:
|
|
revarpinput(m); /* XXX queue? */
|
|
return;
|
|
#endif
|
|
#ifdef INET6
|
|
case ETHERTYPE_IPV6:
|
|
#ifdef GATEWAY
|
|
if (ip6flow_fastforward(m))
|
|
return;
|
|
#endif
|
|
schednetisr(NETISR_IPV6);
|
|
inq = &ip6intrq;
|
|
break;
|
|
#endif
|
|
#ifdef IPX
|
|
case ETHERTYPE_IPX:
|
|
schednetisr(NETISR_IPX);
|
|
inq = &ipxintrq;
|
|
break;
|
|
#endif
|
|
#ifdef NETATALK
|
|
case ETHERTYPE_ATALK:
|
|
schednetisr(NETISR_ATALK);
|
|
inq = &atintrq1;
|
|
break;
|
|
case ETHERTYPE_AARP:
|
|
/* probably this should be done with a NETISR as well */
|
|
aarpinput(ifp, m); /* XXX */
|
|
return;
|
|
#endif /* NETATALK */
|
|
default:
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
} else {
|
|
#if defined (ISO) || defined (LLC) || defined (NETATALK)
|
|
l = (struct llc *)(eh+1);
|
|
switch (l->llc_dsap) {
|
|
#ifdef NETATALK
|
|
case LLC_SNAP_LSAP:
|
|
switch (l->llc_control) {
|
|
case LLC_UI:
|
|
if (l->llc_ssap != LLC_SNAP_LSAP) {
|
|
goto dropanyway;
|
|
}
|
|
|
|
if (memcmp(&(l->llc_snap_org_code)[0],
|
|
at_org_code, sizeof(at_org_code)) == 0 &&
|
|
ntohs(l->llc_snap_ether_type) ==
|
|
ETHERTYPE_ATALK) {
|
|
inq = &atintrq2;
|
|
m_adj(m, sizeof(struct ether_header)
|
|
+ sizeof(struct llc));
|
|
schednetisr(NETISR_ATALK);
|
|
break;
|
|
}
|
|
|
|
if (memcmp(&(l->llc_snap_org_code)[0],
|
|
aarp_org_code,
|
|
sizeof(aarp_org_code)) == 0 &&
|
|
ntohs(l->llc_snap_ether_type) ==
|
|
ETHERTYPE_AARP) {
|
|
m_adj( m, sizeof(struct ether_header)
|
|
+ sizeof(struct llc));
|
|
aarpinput(ifp, m); /* XXX */
|
|
return;
|
|
}
|
|
|
|
default:
|
|
goto dropanyway;
|
|
}
|
|
break;
|
|
#endif /* NETATALK */
|
|
#ifdef ISO
|
|
case LLC_ISO_LSAP:
|
|
switch (l->llc_control) {
|
|
case LLC_UI:
|
|
/* LLC_UI_P forbidden in class 1 service */
|
|
if ((l->llc_dsap == LLC_ISO_LSAP) && /* XXX? case tested */
|
|
(l->llc_ssap == LLC_ISO_LSAP)) {
|
|
/* LSAP for ISO */
|
|
/* XXX length computation?? */
|
|
if (m->m_pkthdr.len > etype + sizeof(struct ether_header))
|
|
m_adj(m, etype - m->m_pkthdr.len);
|
|
|
|
#ifdef ARGO_DEBUG
|
|
if (argo_debug[D_ETHER])
|
|
printf("clnp packet");
|
|
#endif
|
|
schednetisr(NETISR_ISO);
|
|
inq = &clnlintrq;
|
|
break;
|
|
}
|
|
goto dropanyway;
|
|
|
|
case LLC_XID:
|
|
case LLC_XID_P:
|
|
if(m->m_len < LLC_XID_BASIC_MINLEN + sizeof(struct ether_header))
|
|
/* XXX m_pullup? */
|
|
goto dropanyway;
|
|
l->llc_window = 0;
|
|
l->llc_fid = LLC_XID_FORMAT_BASIC;
|
|
l->llc_class = LLC_XID_CLASS_I;
|
|
l->llc_dsap = l->llc_ssap = 0;
|
|
/* Fall through to */
|
|
case LLC_TEST:
|
|
case LLC_TEST_P:
|
|
{
|
|
struct sockaddr sa;
|
|
struct ether_header *eh2;
|
|
int i;
|
|
u_char c = l->llc_dsap;
|
|
|
|
l->llc_dsap = l->llc_ssap;
|
|
l->llc_ssap = c;
|
|
m_adj(m, sizeof(struct ether_header));
|
|
/* XXX we can optimize here? */
|
|
if (m->m_flags & (M_BCAST | M_MCAST))
|
|
memcpy(eh->ether_dhost,
|
|
CLLADDR(ifp->if_sadl),
|
|
ETHER_ADDR_LEN);
|
|
sa.sa_family = AF_UNSPEC;
|
|
sa.sa_len = sizeof(sa);
|
|
eh2 = (struct ether_header *)sa.sa_data;
|
|
for (i = 0; i < 6; i++) {
|
|
eh2->ether_shost[i] = c =
|
|
eh->ether_dhost[i];
|
|
eh2->ether_dhost[i] =
|
|
eh->ether_dhost[i] =
|
|
eh->ether_shost[i];
|
|
eh->ether_shost[i] = c;
|
|
}
|
|
ifp->if_output(ifp, m, &sa, NULL);
|
|
return;
|
|
}
|
|
default:
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
break;
|
|
#endif /* ISO */
|
|
#if defined (ISO) || defined (NETATALK)
|
|
dropanyway:
|
|
#endif
|
|
default:
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
#else /* ISO || LLC || NETATALK*/
|
|
m_freem(m);
|
|
return;
|
|
#endif /* ISO || LLC || NETATALK*/
|
|
}
|
|
|
|
if (IF_QFULL(inq)) {
|
|
IF_DROP(inq);
|
|
m_freem(m);
|
|
} else
|
|
IF_ENQUEUE(inq, m);
|
|
}
|
|
|
|
/*
|
|
* Convert Ethernet address to printable (loggable) representation.
|
|
*/
|
|
char *
|
|
ether_sprintf(const u_char *ap)
|
|
{
|
|
static char etherbuf[3 * ETHER_ADDR_LEN];
|
|
return ether_snprintf(etherbuf, sizeof(etherbuf), ap);
|
|
}
|
|
|
|
char *
|
|
ether_snprintf(char *buf, size_t len, const u_char *ap)
|
|
{
|
|
char *cp = buf;
|
|
size_t i;
|
|
|
|
for (i = 0; i < len / 3; i++) {
|
|
*cp++ = hexdigits[*ap >> 4];
|
|
*cp++ = hexdigits[*ap++ & 0xf];
|
|
*cp++ = ':';
|
|
}
|
|
*--cp = '\0';
|
|
return buf;
|
|
}
|
|
|
|
/*
|
|
* Perform common duties while attaching to interface list
|
|
*/
|
|
void
|
|
ether_ifattach(struct ifnet *ifp, const uint8_t *lla)
|
|
{
|
|
struct ethercom *ec = (struct ethercom *)ifp;
|
|
|
|
ifp->if_type = IFT_ETHER;
|
|
ifp->if_hdrlen = ETHER_HDR_LEN;
|
|
ifp->if_dlt = DLT_EN10MB;
|
|
ifp->if_mtu = ETHERMTU;
|
|
ifp->if_output = ether_output;
|
|
ifp->if_input = ether_input;
|
|
if (ifp->if_baudrate == 0)
|
|
ifp->if_baudrate = IF_Mbps(10); /* just a default */
|
|
|
|
if_set_sadl(ifp, lla, ETHER_ADDR_LEN, !ETHER_IS_LOCAL(lla));
|
|
|
|
LIST_INIT(&ec->ec_multiaddrs);
|
|
ifp->if_broadcastaddr = etherbroadcastaddr;
|
|
#if NBPFILTER > 0
|
|
bpfattach(ifp, DLT_EN10MB, sizeof(struct ether_header));
|
|
#endif
|
|
#ifdef MBUFTRACE
|
|
strlcpy(ec->ec_tx_mowner.mo_name, ifp->if_xname,
|
|
sizeof(ec->ec_tx_mowner.mo_name));
|
|
strlcpy(ec->ec_tx_mowner.mo_descr, "tx",
|
|
sizeof(ec->ec_tx_mowner.mo_descr));
|
|
strlcpy(ec->ec_rx_mowner.mo_name, ifp->if_xname,
|
|
sizeof(ec->ec_rx_mowner.mo_name));
|
|
strlcpy(ec->ec_rx_mowner.mo_descr, "rx",
|
|
sizeof(ec->ec_rx_mowner.mo_descr));
|
|
MOWNER_ATTACH(&ec->ec_tx_mowner);
|
|
MOWNER_ATTACH(&ec->ec_rx_mowner);
|
|
ifp->if_mowner = &ec->ec_tx_mowner;
|
|
#endif
|
|
}
|
|
|
|
void
|
|
ether_ifdetach(struct ifnet *ifp)
|
|
{
|
|
struct ethercom *ec = (void *) ifp;
|
|
struct ether_multi *enm;
|
|
int s;
|
|
|
|
#if NBRIDGE > 0
|
|
if (ifp->if_bridge)
|
|
bridge_ifdetach(ifp);
|
|
#endif
|
|
|
|
#if NBPFILTER > 0
|
|
bpfdetach(ifp);
|
|
#endif
|
|
|
|
#if NVLAN > 0
|
|
if (ec->ec_nvlans)
|
|
vlan_ifdetach(ifp);
|
|
#endif
|
|
|
|
s = splnet();
|
|
while ((enm = LIST_FIRST(&ec->ec_multiaddrs)) != NULL) {
|
|
LIST_REMOVE(enm, enm_list);
|
|
free(enm, M_IFMADDR);
|
|
ec->ec_multicnt--;
|
|
}
|
|
splx(s);
|
|
|
|
#if 0 /* done in if_detach() */
|
|
if_free_sadl(ifp);
|
|
#endif
|
|
|
|
MOWNER_DETACH(&ec->ec_rx_mowner);
|
|
MOWNER_DETACH(&ec->ec_tx_mowner);
|
|
}
|
|
|
|
#if 0
|
|
/*
|
|
* This is for reference. We have a table-driven version
|
|
* of the little-endian crc32 generator, which is faster
|
|
* than the double-loop.
|
|
*/
|
|
uint32_t
|
|
ether_crc32_le(const uint8_t *buf, size_t len)
|
|
{
|
|
uint32_t c, crc, carry;
|
|
size_t i, j;
|
|
|
|
crc = 0xffffffffU; /* initial value */
|
|
|
|
for (i = 0; i < len; i++) {
|
|
c = buf[i];
|
|
for (j = 0; j < 8; j++) {
|
|
carry = ((crc & 0x01) ? 1 : 0) ^ (c & 0x01);
|
|
crc >>= 1;
|
|
c >>= 1;
|
|
if (carry)
|
|
crc = (crc ^ ETHER_CRC_POLY_LE);
|
|
}
|
|
}
|
|
|
|
return (crc);
|
|
}
|
|
#else
|
|
uint32_t
|
|
ether_crc32_le(const uint8_t *buf, size_t len)
|
|
{
|
|
static const uint32_t crctab[] = {
|
|
0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac,
|
|
0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c,
|
|
0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c,
|
|
0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c
|
|
};
|
|
uint32_t crc;
|
|
size_t i;
|
|
|
|
crc = 0xffffffffU; /* initial value */
|
|
|
|
for (i = 0; i < len; i++) {
|
|
crc ^= buf[i];
|
|
crc = (crc >> 4) ^ crctab[crc & 0xf];
|
|
crc = (crc >> 4) ^ crctab[crc & 0xf];
|
|
}
|
|
|
|
return (crc);
|
|
}
|
|
#endif
|
|
|
|
uint32_t
|
|
ether_crc32_be(const uint8_t *buf, size_t len)
|
|
{
|
|
uint32_t c, crc, carry;
|
|
size_t i, j;
|
|
|
|
crc = 0xffffffffU; /* initial value */
|
|
|
|
for (i = 0; i < len; i++) {
|
|
c = buf[i];
|
|
for (j = 0; j < 8; j++) {
|
|
carry = ((crc & 0x80000000U) ? 1 : 0) ^ (c & 0x01);
|
|
crc <<= 1;
|
|
c >>= 1;
|
|
if (carry)
|
|
crc = (crc ^ ETHER_CRC_POLY_BE) | carry;
|
|
}
|
|
}
|
|
|
|
return (crc);
|
|
}
|
|
|
|
#ifdef INET
|
|
const uint8_t ether_ipmulticast_min[ETHER_ADDR_LEN] =
|
|
{ 0x01, 0x00, 0x5e, 0x00, 0x00, 0x00 };
|
|
const uint8_t ether_ipmulticast_max[ETHER_ADDR_LEN] =
|
|
{ 0x01, 0x00, 0x5e, 0x7f, 0xff, 0xff };
|
|
#endif
|
|
#ifdef INET6
|
|
const uint8_t ether_ip6multicast_min[ETHER_ADDR_LEN] =
|
|
{ 0x33, 0x33, 0x00, 0x00, 0x00, 0x00 };
|
|
const uint8_t ether_ip6multicast_max[ETHER_ADDR_LEN] =
|
|
{ 0x33, 0x33, 0xff, 0xff, 0xff, 0xff };
|
|
#endif
|
|
|
|
/*
|
|
* ether_aton implementation, not using a static buffer.
|
|
*/
|
|
int
|
|
ether_nonstatic_aton(u_char *dest, char *str)
|
|
{
|
|
int i;
|
|
char *cp = str;
|
|
u_char val[6];
|
|
|
|
#define set_value \
|
|
if (*cp > '9' && *cp < 'a') \
|
|
*cp -= 'A' - 10; \
|
|
else if (*cp > '9') \
|
|
*cp -= 'a' - 10; \
|
|
else \
|
|
*cp -= '0'
|
|
|
|
for (i = 0; i < 6; i++, cp++) {
|
|
if (!isxdigit(*cp))
|
|
return (1);
|
|
set_value;
|
|
val[i] = *cp++;
|
|
if (isxdigit(*cp)) {
|
|
set_value;
|
|
val[i] *= 16;
|
|
val[i] += *cp++;
|
|
}
|
|
if (*cp == ':' || i == 5)
|
|
continue;
|
|
else
|
|
return 1;
|
|
}
|
|
memcpy(dest, val, 6);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* Convert a sockaddr into an Ethernet address or range of Ethernet
|
|
* addresses.
|
|
*/
|
|
int
|
|
ether_multiaddr(const struct sockaddr *sa, uint8_t addrlo[ETHER_ADDR_LEN],
|
|
uint8_t addrhi[ETHER_ADDR_LEN])
|
|
{
|
|
#ifdef INET
|
|
const struct sockaddr_in *sin;
|
|
#endif /* INET */
|
|
#ifdef INET6
|
|
const struct sockaddr_in6 *sin6;
|
|
#endif /* INET6 */
|
|
|
|
switch (sa->sa_family) {
|
|
|
|
case AF_UNSPEC:
|
|
memcpy(addrlo, sa->sa_data, ETHER_ADDR_LEN);
|
|
memcpy(addrhi, addrlo, ETHER_ADDR_LEN);
|
|
break;
|
|
|
|
#ifdef INET
|
|
case AF_INET:
|
|
sin = satocsin(sa);
|
|
if (sin->sin_addr.s_addr == INADDR_ANY) {
|
|
/*
|
|
* An IP address of INADDR_ANY means listen to
|
|
* or stop listening to all of the Ethernet
|
|
* multicast addresses used for IP.
|
|
* (This is for the sake of IP multicast routers.)
|
|
*/
|
|
memcpy(addrlo, ether_ipmulticast_min, ETHER_ADDR_LEN);
|
|
memcpy(addrhi, ether_ipmulticast_max, ETHER_ADDR_LEN);
|
|
}
|
|
else {
|
|
ETHER_MAP_IP_MULTICAST(&sin->sin_addr, addrlo);
|
|
memcpy(addrhi, addrlo, ETHER_ADDR_LEN);
|
|
}
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
sin6 = satocsin6(sa);
|
|
if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
|
|
/*
|
|
* An IP6 address of 0 means listen to or stop
|
|
* listening to all of the Ethernet multicast
|
|
* address used for IP6.
|
|
* (This is used for multicast routers.)
|
|
*/
|
|
memcpy(addrlo, ether_ip6multicast_min, ETHER_ADDR_LEN);
|
|
memcpy(addrhi, ether_ip6multicast_max, ETHER_ADDR_LEN);
|
|
} else {
|
|
ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, addrlo);
|
|
memcpy(addrhi, addrlo, ETHER_ADDR_LEN);
|
|
}
|
|
break;
|
|
#endif
|
|
|
|
default:
|
|
return EAFNOSUPPORT;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Add an Ethernet multicast address or range of addresses to the list for a
|
|
* given interface.
|
|
*/
|
|
int
|
|
ether_addmulti(const struct sockaddr *sa, struct ethercom *ec)
|
|
{
|
|
struct ether_multi *enm;
|
|
u_char addrlo[ETHER_ADDR_LEN];
|
|
u_char addrhi[ETHER_ADDR_LEN];
|
|
int s = splnet(), error;
|
|
|
|
error = ether_multiaddr(sa, addrlo, addrhi);
|
|
if (error != 0) {
|
|
splx(s);
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Verify that we have valid Ethernet multicast addresses.
|
|
*/
|
|
if ((addrlo[0] & 0x01) != 1 || (addrhi[0] & 0x01) != 1) {
|
|
splx(s);
|
|
return EINVAL;
|
|
}
|
|
/*
|
|
* See if the address range is already in the list.
|
|
*/
|
|
ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm);
|
|
if (enm != NULL) {
|
|
/*
|
|
* Found it; just increment the reference count.
|
|
*/
|
|
++enm->enm_refcount;
|
|
splx(s);
|
|
return 0;
|
|
}
|
|
/*
|
|
* New address or range; malloc a new multicast record
|
|
* and link it into the interface's multicast list.
|
|
*/
|
|
enm = (struct ether_multi *)malloc(sizeof(*enm), M_IFMADDR, M_NOWAIT);
|
|
if (enm == NULL) {
|
|
splx(s);
|
|
return ENOBUFS;
|
|
}
|
|
memcpy(enm->enm_addrlo, addrlo, 6);
|
|
memcpy(enm->enm_addrhi, addrhi, 6);
|
|
enm->enm_refcount = 1;
|
|
LIST_INSERT_HEAD(&ec->ec_multiaddrs, enm, enm_list);
|
|
ec->ec_multicnt++;
|
|
splx(s);
|
|
/*
|
|
* Return ENETRESET to inform the driver that the list has changed
|
|
* and its reception filter should be adjusted accordingly.
|
|
*/
|
|
return ENETRESET;
|
|
}
|
|
|
|
/*
|
|
* Delete a multicast address record.
|
|
*/
|
|
int
|
|
ether_delmulti(const struct sockaddr *sa, struct ethercom *ec)
|
|
{
|
|
struct ether_multi *enm;
|
|
u_char addrlo[ETHER_ADDR_LEN];
|
|
u_char addrhi[ETHER_ADDR_LEN];
|
|
int s = splnet(), error;
|
|
|
|
error = ether_multiaddr(sa, addrlo, addrhi);
|
|
if (error != 0) {
|
|
splx(s);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Look ur the address in our list.
|
|
*/
|
|
ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm);
|
|
if (enm == NULL) {
|
|
splx(s);
|
|
return (ENXIO);
|
|
}
|
|
if (--enm->enm_refcount != 0) {
|
|
/*
|
|
* Still some claims to this record.
|
|
*/
|
|
splx(s);
|
|
return (0);
|
|
}
|
|
/*
|
|
* No remaining claims to this record; unlink and free it.
|
|
*/
|
|
LIST_REMOVE(enm, enm_list);
|
|
free(enm, M_IFMADDR);
|
|
ec->ec_multicnt--;
|
|
splx(s);
|
|
/*
|
|
* Return ENETRESET to inform the driver that the list has changed
|
|
* and its reception filter should be adjusted accordingly.
|
|
*/
|
|
return (ENETRESET);
|
|
}
|
|
|
|
void
|
|
ether_set_ifflags_cb(struct ethercom *ec, ether_cb_t cb)
|
|
{
|
|
ec->ec_ifflags_cb = cb;
|
|
}
|
|
|
|
/*
|
|
* Common ioctls for Ethernet interfaces. Note, we must be
|
|
* called at splnet().
|
|
*/
|
|
int
|
|
ether_ioctl(struct ifnet *ifp, u_long cmd, void *data)
|
|
{
|
|
struct ethercom *ec = (void *) ifp;
|
|
struct ifreq *ifr = (struct ifreq *)data;
|
|
struct if_laddrreq *iflr = data;
|
|
const struct sockaddr_dl *sdl;
|
|
static const uint8_t zero[ETHER_ADDR_LEN];
|
|
int error;
|
|
|
|
switch (cmd) {
|
|
case SIOCINITIFADDR:
|
|
if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) !=
|
|
(IFF_UP|IFF_RUNNING)) {
|
|
ifp->if_flags |= IFF_UP;
|
|
if ((error = (*ifp->if_init)(ifp)) != 0)
|
|
return error;
|
|
}
|
|
#ifdef INET
|
|
{
|
|
struct ifaddr *ifa = (struct ifaddr *)data;
|
|
|
|
if (ifa->ifa_addr->sa_family == AF_INET)
|
|
arp_ifinit(ifp, ifa);
|
|
}
|
|
#endif /* INET */
|
|
return 0;
|
|
|
|
case SIOCSIFMTU:
|
|
{
|
|
int maxmtu;
|
|
|
|
if (ec->ec_capabilities & ETHERCAP_JUMBO_MTU)
|
|
maxmtu = ETHERMTU_JUMBO;
|
|
else
|
|
maxmtu = ETHERMTU;
|
|
|
|
if (ifr->ifr_mtu < ETHERMIN || ifr->ifr_mtu > maxmtu)
|
|
return EINVAL;
|
|
else if ((error = ifioctl_common(ifp, cmd, data)) != ENETRESET)
|
|
return error;
|
|
else if (ifp->if_flags & IFF_UP) {
|
|
/* Make sure the device notices the MTU change. */
|
|
return (*ifp->if_init)(ifp);
|
|
} else
|
|
return 0;
|
|
}
|
|
|
|
case SIOCSIFFLAGS:
|
|
if ((error = ifioctl_common(ifp, cmd, data)) != 0)
|
|
return error;
|
|
switch (ifp->if_flags & (IFF_UP|IFF_RUNNING)) {
|
|
case IFF_RUNNING:
|
|
/*
|
|
* If interface is marked down and it is running,
|
|
* then stop and disable it.
|
|
*/
|
|
(*ifp->if_stop)(ifp, 1);
|
|
break;
|
|
case IFF_UP:
|
|
/*
|
|
* If interface is marked up and it is stopped, then
|
|
* start it.
|
|
*/
|
|
return (*ifp->if_init)(ifp);
|
|
case IFF_UP|IFF_RUNNING:
|
|
error = 0;
|
|
if (ec->ec_ifflags_cb == NULL ||
|
|
(error = (*ec->ec_ifflags_cb)(ec)) == ENETRESET) {
|
|
/*
|
|
* Reset the interface to pick up
|
|
* changes in any other flags that
|
|
* affect the hardware state.
|
|
*/
|
|
return (*ifp->if_init)(ifp);
|
|
} else
|
|
return error;
|
|
case 0:
|
|
break;
|
|
}
|
|
return 0;
|
|
case SIOCADDMULTI:
|
|
return ether_addmulti(ifreq_getaddr(cmd, ifr), ec);
|
|
case SIOCDELMULTI:
|
|
return ether_delmulti(ifreq_getaddr(cmd, ifr), ec);
|
|
case SIOCSIFMEDIA:
|
|
case SIOCGIFMEDIA:
|
|
if (ec->ec_mii == NULL)
|
|
return ENOTTY;
|
|
return ifmedia_ioctl(ifp, ifr, &ec->ec_mii->mii_media, cmd);
|
|
case SIOCALIFADDR:
|
|
sdl = satocsdl(sstocsa(&iflr->addr));
|
|
if (sdl->sdl_family != AF_LINK)
|
|
;
|
|
else if (ETHER_IS_MULTICAST(CLLADDR(sdl)))
|
|
return EINVAL;
|
|
else if (memcmp(zero, CLLADDR(sdl), sizeof(zero)) == 0)
|
|
return EINVAL;
|
|
/*FALLTHROUGH*/
|
|
default:
|
|
return ifioctl_common(ifp, cmd, data);
|
|
}
|
|
return 0;
|
|
}
|