791 lines
21 KiB
C
791 lines
21 KiB
C
/* $NetBSD: if_tokensubr.c,v 1.26 2004/06/18 19:41:25 wiz Exp $ */
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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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* from: NetBSD: if_fddisubr.c,v 1.2 1995/08/19 04:35:29 cgd Exp
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*/
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/*
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* Copyright (c) 1997-1999 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Onno van der Linden.
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by The NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1995
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* Matt Thomas. 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. The names of its contributors may not be used to endorse or promote
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* products derived from this software without specific prior written
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* 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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* from: NetBSD: if_fddisubr.c,v 1.2 1995/08/19 04:35:29 cgd Exp
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: if_tokensubr.c,v 1.26 2004/06/18 19:41:25 wiz Exp $");
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#include "opt_inet.h"
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#include "opt_atalk.h"
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#include "opt_ccitt.h"
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#include "opt_llc.h"
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#include "opt_iso.h"
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#include "opt_ns.h"
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#include "opt_gateway.h"
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#include "bpfilter.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/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 <machine/cpu.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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#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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#include <net/if_token.h>
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#ifdef INET
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#include <netinet/in.h>
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#include <netinet/in_var.h>
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#include <netinet/if_inarp.h>
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#endif
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#ifdef NS
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#include <netns/ns.h>
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#include <netns/ns_if.h>
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#endif
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#ifdef DECNET
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#include <netdnet/dn.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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#include "bpfilter.h"
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#ifdef LLC
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#include <netccitt/dll.h>
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#include <netccitt/llc_var.h>
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#endif
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/*
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* TODO:
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* handle source routing via send_xid()
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* source routing for ISO,LLC,CCITT protocols
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* need sockaddr_dl_8025 to handle this correctly
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* IPX cases
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* handle "fast" forwarding like if_ether and if_fddi
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*/
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#if defined(LLC) && defined(CCITT)
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extern struct ifqueue pkintrq;
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#endif
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#define senderr(e) { error = (e); goto bad;}
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#if defined(__bsdi__) || defined(__NetBSD__)
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#define RTALLOC1(a, b) rtalloc1(a, b)
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#define ARPRESOLVE(a, b, c, d, e, f) arpresolve(a, b, c, d, e)
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#define TYPEHTONS(t) (t)
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#elif defined(__FreeBSD__)
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#define RTALLOC1(a, b) rtalloc1(a, b, 0UL)
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#define ARPRESOLVE(a, b, c, d, e, f) arpresolve(a, b, c, d, e, f)
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#define TYPEHTONS(t) (htons(t))
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#endif
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#define RCF_ALLROUTES (2 << 8) | TOKEN_RCF_FRAME2 | TOKEN_RCF_BROADCAST_ALL
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#define RCF_SINGLEROUTE (2 << 8) | TOKEN_RCF_FRAME2 | TOKEN_RCF_BROADCAST_SINGLE
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static int token_output __P((struct ifnet *, struct mbuf *,
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struct sockaddr *, struct rtentry *));
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static void token_input __P((struct ifnet *, struct mbuf *));
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/*
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* Token Ring 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 arphdr structure.
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* XXX route info has to go into the same mbuf as the header
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*/
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static int
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token_output(ifp, m0, dst, rt0)
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struct ifnet *ifp;
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struct mbuf *m0;
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struct sockaddr *dst;
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struct rtentry *rt0;
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{
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u_int16_t etype;
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int s, len, error = 0;
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u_char edst[ISO88025_ADDR_LEN];
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struct mbuf *m = m0;
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struct rtentry *rt;
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struct mbuf *mcopy = (struct mbuf *)0;
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struct token_header *trh;
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#ifdef INET
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struct arphdr *ah = (struct arphdr *)ifp;
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#endif /* INET */
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struct token_rif *rif = (struct token_rif *)0;
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struct token_rif bcastrif;
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size_t riflen = 0;
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ALTQ_DECL(struct altq_pktattr pktattr;)
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short mflags;
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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)) {
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if ((rt->rt_flags & RTF_UP) == 0) {
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if ((rt0 = rt = RTALLOC1(dst, 1)))
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rt->rt_refcnt--;
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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) {
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if (rt->rt_gwroute == 0)
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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) == 0)
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senderr(EHOSTUNREACH);
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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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time.tv_sec < rt->rt_rmx.rmx_expire)
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senderr(rt == rt0 ? EHOSTDOWN : EHOSTUNREACH);
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}
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/*
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* If the queueing discipline needs packet classification,
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* do it before prepending link headers.
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*/
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IFQ_CLASSIFY(&ifp->if_snd, m, dst->sa_family, &pktattr);
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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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if (ifp->if_flags & IFF_LINK0) {
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if (ifp->if_flags & IFF_LINK1)
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bcastrif.tr_rcf = htons(RCF_ALLROUTES);
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else
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bcastrif.tr_rcf = htons(RCF_SINGLEROUTE);
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rif = &bcastrif;
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riflen = sizeof(rif->tr_rcf);
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}
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bcopy((caddr_t)tokenbroadcastaddr, (caddr_t)edst,
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sizeof(edst));
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}
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/*
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* XXX m->m_flags & M_MCAST IEEE802_MAP_IP_MULTICAST ??
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*/
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else {
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if (!ARPRESOLVE(ifp, rt, m, dst, edst, rt0))
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return (0); /* if not yet resolved */
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rif = TOKEN_RIF((struct llinfo_arp *) rt->rt_llinfo);
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riflen = (ntohs(rif->tr_rcf) & TOKEN_RCF_LEN_MASK) >> 8;
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}
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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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/*
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* XXX source routing, assume m->m_data contains the useful stuff
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*/
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ah = mtod(m, struct arphdr *);
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ah->ar_hrd = htons(ARPHRD_IEEE802);
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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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if (m->m_flags & M_BCAST) {
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if (ifp->if_flags & IFF_LINK0) {
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if (ifp->if_flags & IFF_LINK1)
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bcastrif.tr_rcf = htons(RCF_ALLROUTES);
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else
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bcastrif.tr_rcf = htons(RCF_SINGLEROUTE);
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rif = &bcastrif;
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riflen = sizeof(rif->tr_rcf);
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}
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bcopy((caddr_t)tokenbroadcastaddr, (caddr_t)edst,
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sizeof(edst));
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}
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else {
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bcopy((caddr_t)ar_tha(ah), (caddr_t)edst, sizeof(edst));
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trh = (struct token_header *)M_TRHSTART(m);
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trh->token_ac = TOKEN_AC;
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trh->token_fc = TOKEN_FC;
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if (trh->token_shost[0] & TOKEN_RI_PRESENT) {
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struct token_rif *trrif;
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trrif = TOKEN_RIF(trh);
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riflen = (ntohs(trrif->tr_rcf) & TOKEN_RCF_LEN_MASK) >> 8;
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}
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bcopy((caddr_t)edst, (caddr_t)trh->token_dhost,
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sizeof (edst));
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bcopy(LLADDR(ifp->if_sadl), (caddr_t)trh->token_shost,
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sizeof(trh->token_shost));
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if (riflen != 0)
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trh->token_shost[0] |= TOKEN_RI_PRESENT;
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/*
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* compare (m->m_data - m->m_pktdat) with (sizeof(struct token_header) + riflen + ...
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*/
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m->m_len += (sizeof(*trh) + riflen + LLC_SNAPFRAMELEN);
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m->m_data -= (sizeof(*trh) + riflen + LLC_SNAPFRAMELEN);
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m->m_pkthdr.len += (sizeof(*trh) + riflen + LLC_SNAPFRAMELEN);
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goto send;
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}
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break;
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#endif
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#ifdef NS
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case AF_NS:
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etype = htons(ETHERTYPE_NS);
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bcopy((caddr_t)&(((struct sockaddr_ns *)dst)->sns_addr.x_host),
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(caddr_t)edst, sizeof (edst));
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if (!bcmp((caddr_t)edst, (caddr_t)&ns_thishost, sizeof(edst)))
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return (looutput(ifp, m, dst, rt));
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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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struct sockaddr_dl *sdl;
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if (rt && (sdl = (struct sockaddr_dl *)rt->rt_gateway) &&
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sdl->sdl_family == AF_LINK && sdl->sdl_alen > 0) {
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bcopy(LLADDR(sdl), (caddr_t)edst, sizeof(edst));
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}
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else if ((error =
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iso_snparesolve(ifp, (struct sockaddr_iso *)dst,
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(char *)edst, &snpalen)))
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goto bad; /* Not resolved */
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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 (*trh), M_DONTWAIT);
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if (mcopy) {
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trh = mtod(mcopy, struct token_header *);
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bcopy((caddr_t)edst,
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(caddr_t)trh->token_dhost, sizeof (edst));
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bcopy(LLADDR(ifp->if_sadl),
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(caddr_t)trh->token_shost, 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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etype = 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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#if defined(__FreeBSD__)
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IFDEBUG(D_ETHER)
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int i;
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printf("token_output: sending pkt to: ");
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for (i=0; i < ISO88025_ADDR_LEN; i++)
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printf("%x ", edst[i] & 0xff);
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printf("\n");
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ENDDEBUG
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#endif
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} break;
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#endif /* ISO */
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#ifdef LLC
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/* case AF_NSAP: */
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case AF_CCITT: {
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struct sockaddr_dl *sdl =
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(struct sockaddr_dl *) rt -> rt_gateway;
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if (sdl && sdl->sdl_family == AF_LINK
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&& sdl->sdl_alen > 0) {
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bcopy(LLADDR(sdl), (char *)edst, sizeof(edst));
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}
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else {
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/* Not a link interface ? Funny ... */
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goto bad;
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}
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if ((ifp->if_flags & IFF_SIMPLEX) && (*edst & 1) &&
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(mcopy = m_copy(m, 0, (int)M_COPYALL))) {
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M_PREPEND(mcopy, sizeof (*trh), M_DONTWAIT);
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if (mcopy) {
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trh = mtod(mcopy, struct token_header *);
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bcopy((caddr_t)edst,
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(caddr_t)trh->token_dhost, sizeof (edst));
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bcopy(LLADDR(ifp->if_sadl),
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(caddr_t)trh->token_shost, sizeof (edst));
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}
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}
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etype = 0;
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#ifdef LLC_DEBUG
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{
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int i;
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struct llc *l = mtod(m, struct llc *);
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printf("token_output: sending LLC2 pkt to: ");
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for (i=0; i < ISO88025_ADDR_LEN; i++)
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printf("%x ", edst[i] & 0xff);
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printf(" len 0x%x dsap 0x%x ssap 0x%x control 0x%x\n",
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etype & 0xff, l->llc_dsap & 0xff, l->llc_ssap &0xff,
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l->llc_control & 0xff);
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}
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#endif /* LLC_DEBUG */
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}
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break;
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#endif /* LLC */
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case AF_UNSPEC:
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{
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struct ether_header *eh;
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eh = (struct ether_header *)dst->sa_data;
|
|
bcopy((caddr_t)eh->ether_dhost, (caddr_t)edst, sizeof (edst));
|
|
if (*edst & 1)
|
|
m->m_flags |= (M_BCAST|M_MCAST);
|
|
etype = TYPEHTONS(eh->ether_type);
|
|
if (m->m_flags & M_BCAST) {
|
|
if (ifp->if_flags & IFF_LINK0) {
|
|
if (ifp->if_flags & IFF_LINK1)
|
|
bcastrif.tr_rcf = htons(RCF_ALLROUTES);
|
|
else
|
|
bcastrif.tr_rcf = htons(RCF_SINGLEROUTE);
|
|
rif = &bcastrif;
|
|
riflen = sizeof(bcastrif.tr_rcf);
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
|
|
default:
|
|
printf("%s: can't handle af%d\n", ifp->if_xname,
|
|
dst->sa_family);
|
|
senderr(EAFNOSUPPORT);
|
|
}
|
|
|
|
|
|
if (mcopy)
|
|
(void) looutput(ifp, mcopy, dst, rt);
|
|
if (etype != 0) {
|
|
struct llc *l;
|
|
M_PREPEND(m, LLC_SNAPFRAMELEN, M_DONTWAIT);
|
|
if (m == 0)
|
|
senderr(ENOBUFS);
|
|
l = mtod(m, struct llc *);
|
|
l->llc_control = LLC_UI;
|
|
l->llc_dsap = l->llc_ssap = LLC_SNAP_LSAP;
|
|
l->llc_snap.org_code[0] = l->llc_snap.org_code[1] =
|
|
l->llc_snap.org_code[2] = 0;
|
|
bcopy((caddr_t) &etype, (caddr_t) &l->llc_snap.ether_type,
|
|
sizeof(u_int16_t));
|
|
}
|
|
|
|
/*
|
|
* Add local net header. If no space in first mbuf,
|
|
* allocate another.
|
|
*/
|
|
|
|
M_PREPEND(m, (riflen + sizeof (*trh)), M_DONTWAIT);
|
|
if (m == 0)
|
|
senderr(ENOBUFS);
|
|
trh = mtod(m, struct token_header *);
|
|
trh->token_ac = TOKEN_AC;
|
|
trh->token_fc = TOKEN_FC;
|
|
bcopy((caddr_t)edst, (caddr_t)trh->token_dhost, sizeof (edst));
|
|
bcopy(LLADDR(ifp->if_sadl), (caddr_t)trh->token_shost,
|
|
sizeof(trh->token_shost));
|
|
|
|
if (riflen != 0) {
|
|
struct token_rif *trrif;
|
|
|
|
trh->token_shost[0] |= TOKEN_RI_PRESENT;
|
|
trrif = TOKEN_RIF(trh);
|
|
bcopy(rif, trrif, riflen);
|
|
}
|
|
#ifdef INET
|
|
send:
|
|
#endif
|
|
|
|
mflags = m->m_flags;
|
|
len = m->m_pkthdr.len;
|
|
s = splnet();
|
|
/*
|
|
* Queue message on interface, and start output if interface
|
|
* not yet active.
|
|
*/
|
|
IFQ_ENQUEUE(&ifp->if_snd, m, &pktattr, error);
|
|
if (error) {
|
|
/* mbuf is already freed */
|
|
splx(s);
|
|
return (error);
|
|
}
|
|
ifp->if_obytes += len;
|
|
if (mflags & M_MCAST)
|
|
ifp->if_omcasts++;
|
|
if ((ifp->if_flags & IFF_OACTIVE) == 0)
|
|
(*ifp->if_start)(ifp);
|
|
splx(s);
|
|
return (error);
|
|
|
|
bad:
|
|
if (m)
|
|
m_freem(m);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Process a received token ring packet;
|
|
* the packet is in the mbuf chain m with
|
|
* the token ring header.
|
|
*/
|
|
static void
|
|
token_input(ifp, m)
|
|
struct ifnet *ifp;
|
|
struct mbuf *m;
|
|
{
|
|
struct ifqueue *inq;
|
|
struct llc *l;
|
|
struct token_header *trh;
|
|
int s, lan_hdr_len;
|
|
|
|
if ((ifp->if_flags & IFF_UP) == 0) {
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
|
|
trh = mtod(m, struct token_header *);
|
|
|
|
ifp->if_ibytes += m->m_pkthdr.len;
|
|
if (bcmp((caddr_t)tokenbroadcastaddr, (caddr_t)trh->token_dhost,
|
|
sizeof(tokenbroadcastaddr)) == 0)
|
|
m->m_flags |= M_BCAST;
|
|
else if (trh->token_dhost[0] & 1)
|
|
m->m_flags |= M_MCAST;
|
|
if (m->m_flags & (M_BCAST|M_MCAST))
|
|
ifp->if_imcasts++;
|
|
|
|
/* Skip past the Token Ring header and RIF. */
|
|
lan_hdr_len = sizeof(struct token_header);
|
|
if (trh->token_shost[0] & TOKEN_RI_PRESENT) {
|
|
struct token_rif *trrif;
|
|
|
|
trrif = TOKEN_RIF(trh);
|
|
lan_hdr_len += (ntohs(trrif->tr_rcf) & TOKEN_RCF_LEN_MASK) >> 8;
|
|
}
|
|
m_adj(m, lan_hdr_len);
|
|
|
|
l = mtod(m, struct llc *);
|
|
switch (l->llc_dsap) {
|
|
#if defined(INET) || defined(NS) || defined(DECNET)
|
|
case LLC_SNAP_LSAP:
|
|
{
|
|
u_int16_t etype;
|
|
if (l->llc_control != LLC_UI || l->llc_ssap != LLC_SNAP_LSAP)
|
|
goto dropanyway;
|
|
if (l->llc_snap.org_code[0] != 0 ||
|
|
l->llc_snap.org_code[1] != 0 ||
|
|
l->llc_snap.org_code[2] != 0)
|
|
goto dropanyway;
|
|
etype = ntohs(l->llc_snap.ether_type);
|
|
m_adj(m, LLC_SNAPFRAMELEN);
|
|
switch (etype) {
|
|
#ifdef INET
|
|
case ETHERTYPE_IP:
|
|
schednetisr(NETISR_IP);
|
|
inq = &ipintrq;
|
|
break;
|
|
|
|
case ETHERTYPE_ARP:
|
|
schednetisr(NETISR_ARP);
|
|
inq = &arpintrq;
|
|
break;
|
|
#endif
|
|
#ifdef NS
|
|
case ETHERTYPE_NS:
|
|
schednetisr(NETISR_NS);
|
|
inq = &nsintrq;
|
|
break;
|
|
#endif
|
|
#ifdef DECNET
|
|
case ETHERTYPE_DECNET:
|
|
schednetisr(NETISR_DECNET);
|
|
inq = &decnetintrq;
|
|
break;
|
|
#endif
|
|
default:
|
|
/*
|
|
printf("token_input: unknown protocol 0x%x\n", etype);
|
|
*/
|
|
ifp->if_noproto++;
|
|
goto dropanyway;
|
|
}
|
|
break;
|
|
}
|
|
#endif /* INET || NS */
|
|
#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) &&
|
|
(l->llc_ssap == LLC_ISO_LSAP)) {
|
|
/* LSAP for ISO */
|
|
m->m_data += 3; /* XXX */
|
|
m->m_len -= 3; /* XXX */
|
|
m->m_pkthdr.len -= 3; /* XXX */
|
|
M_PREPEND(m, sizeof *trh, M_DONTWAIT);
|
|
if (m == 0)
|
|
return;
|
|
*mtod(m, struct token_header *) = *trh;
|
|
#if defined(__FreeBSD__)
|
|
IFDEBUG(D_ETHER)
|
|
printf("clnp packet");
|
|
ENDDEBUG
|
|
#endif
|
|
schednetisr(NETISR_ISO);
|
|
inq = &clnlintrq;
|
|
break;
|
|
}
|
|
goto dropanyway;
|
|
|
|
case LLC_XID:
|
|
case LLC_XID_P:
|
|
if(m->m_len < ISO88025_ADDR_LEN)
|
|
goto dropanyway;
|
|
l->llc_window = 0;
|
|
l->llc_fid = 9;
|
|
l->llc_class = 1;
|
|
l->llc_dsap = l->llc_ssap = 0;
|
|
/* Fall through to */
|
|
case LLC_TEST:
|
|
case LLC_TEST_P:
|
|
{
|
|
struct sockaddr sa;
|
|
struct ether_header *eh;
|
|
int i;
|
|
u_char c = l->llc_dsap;
|
|
|
|
l->llc_dsap = l->llc_ssap;
|
|
l->llc_ssap = c;
|
|
if (m->m_flags & (M_BCAST | M_MCAST))
|
|
bcopy(LLADDR(ifp->if_sadl),
|
|
(caddr_t)trh->token_dhost,
|
|
ISO88025_ADDR_LEN);
|
|
sa.sa_family = AF_UNSPEC;
|
|
sa.sa_len = sizeof(sa);
|
|
eh = (struct ether_header *)sa.sa_data;
|
|
for (i = 0; i < ISO88025_ADDR_LEN; i++) {
|
|
eh->ether_shost[i] = c = trh->token_dhost[i];
|
|
eh->ether_dhost[i] =
|
|
eh->ether_dhost[i] = trh->token_shost[i];
|
|
eh->ether_shost[i] = c;
|
|
}
|
|
eh->ether_type = 0;
|
|
ifp->if_output(ifp, m, &sa, NULL);
|
|
return;
|
|
}
|
|
default:
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
break;
|
|
#endif /* ISO */
|
|
#ifdef LLC
|
|
case LLC_X25_LSAP:
|
|
{
|
|
/*
|
|
* XXX check for source routing info ? (sizeof(struct sdl_hdr) and
|
|
* ISO88025_ADDR_LEN)
|
|
*/
|
|
M_PREPEND(m, sizeof(struct sdl_hdr) , M_DONTWAIT);
|
|
if (m == 0)
|
|
return;
|
|
if (!sdl_sethdrif(ifp, trh->token_shost, LLC_X25_LSAP,
|
|
trh->token_dhost, LLC_X25_LSAP,
|
|
ISO88025_ADDR_LEN,
|
|
mtod(m, struct sdl_hdr *)))
|
|
panic("ETHER cons addr failure");
|
|
mtod(m, struct sdl_hdr *)->sdlhdr_len =
|
|
m->m_pkthdr.len - sizeof(struct sdl_hdr);
|
|
#ifdef LLC_DEBUG
|
|
printf("llc packet\n");
|
|
#endif /* LLC_DEBUG */
|
|
schednetisr(NETISR_CCITT);
|
|
inq = &llcintrq;
|
|
break;
|
|
}
|
|
#endif /* LLC */
|
|
|
|
default:
|
|
/* printf("token_input: unknown dsap 0x%x\n", l->llc_dsap); */
|
|
ifp->if_noproto++;
|
|
dropanyway:
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
|
|
s = splnet();
|
|
if (IF_QFULL(inq)) {
|
|
IF_DROP(inq);
|
|
m_freem(m);
|
|
}
|
|
else
|
|
IF_ENQUEUE(inq, m);
|
|
splx(s);
|
|
}
|
|
|
|
/*
|
|
* Perform common duties while attaching to interface list
|
|
*/
|
|
void
|
|
token_ifattach(ifp, lla)
|
|
struct ifnet *ifp;
|
|
caddr_t lla;
|
|
{
|
|
|
|
ifp->if_type = IFT_ISO88025;
|
|
ifp->if_addrlen = ISO88025_ADDR_LEN;
|
|
ifp->if_hdrlen = 14;
|
|
ifp->if_dlt = DLT_IEEE802;
|
|
ifp->if_mtu = ISO88025_MTU;
|
|
ifp->if_output = token_output;
|
|
ifp->if_input = token_input;
|
|
ifp->if_broadcastaddr = tokenbroadcastaddr;
|
|
#ifdef IFF_NOTRAILERS
|
|
ifp->if_flags |= IFF_NOTRAILERS;
|
|
#endif
|
|
|
|
if_alloc_sadl(ifp);
|
|
memcpy(LLADDR(ifp->if_sadl), lla, ifp->if_addrlen);
|
|
|
|
#if NBPFILTER > 0
|
|
bpfattach(ifp, DLT_IEEE802, sizeof(struct token_header));
|
|
#endif
|
|
}
|
|
|
|
void
|
|
token_ifdetach(ifp)
|
|
struct ifnet *ifp;
|
|
{
|
|
|
|
#if NBPFILTER > 0
|
|
bpfdetach(ifp);
|
|
#endif
|
|
#if 0 /* done in if_detach() */
|
|
if_free_sadl(ifp);
|
|
#endif
|
|
}
|