1327 lines
31 KiB
C
1327 lines
31 KiB
C
/* $NetBSD: if.c,v 1.77 2000/12/13 22:06:05 thorpej Exp $ */
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/*-
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* Copyright (c) 1999, 2000 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 William Studnemund and Jason R. Thorpe.
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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, 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) 1980, 1986, 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. 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 University of
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* California, Berkeley and its contributors.
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* 4. 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.c 8.5 (Berkeley) 1/9/95
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*/
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#include "opt_inet.h"
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#include "opt_compat_linux.h"
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#include "opt_compat_svr4.h"
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#include "opt_compat_43.h"
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#include "opt_atalk.h"
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#include <sys/param.h>
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#include <sys/mbuf.h>
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#include <sys/systm.h>
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#include <sys/callout.h>
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#include <sys/proc.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/domain.h>
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#include <sys/protosw.h>
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#include <sys/kernel.h>
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#include <sys/ioctl.h>
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#include <net/if.h>
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#include <net/if_dl.h>
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#include <net/if_ether.h>
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#include <net/if_ieee80211.h>
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#include <net/if_types.h>
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#include <net/radix.h>
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#include <net/route.h>
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#ifdef NETATALK
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#include <netatalk/at_extern.h>
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#include <netatalk/at.h>
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#endif
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#ifdef INET6
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/*XXX*/
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#include <netinet/in.h>
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#include <netinet6/in6_var.h>
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#endif
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int ifqmaxlen = IFQ_MAXLEN;
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struct callout if_slowtimo_ch;
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#ifdef INET6
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/*
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* XXX: declare here to avoid to include many inet6 related files..
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* should be more generalized?
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*/
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extern void nd6_setmtu __P((struct ifnet *));
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#endif
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int if_rt_walktree __P((struct radix_node *, void *));
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struct if_clone *if_clone_lookup __P((const char *, int *));
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int if_clone_list __P((struct if_clonereq *));
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LIST_HEAD(, if_clone) if_cloners = LIST_HEAD_INITIALIZER(if_cloners);
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int if_cloners_count;
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/*
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* Network interface utility routines.
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*
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* Routines with ifa_ifwith* names take sockaddr *'s as
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* parameters.
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*/
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void
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ifinit()
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{
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callout_init(&if_slowtimo_ch);
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if_slowtimo(NULL);
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}
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/*
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* Null routines used while an interface is going away. These routines
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* just return an error.
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*/
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int
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if_nulloutput(ifp, m, so, rt)
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struct ifnet *ifp;
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struct mbuf *m;
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struct sockaddr *so;
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struct rtentry *rt;
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{
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return (ENXIO);
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}
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void
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if_nullinput(ifp, m)
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struct ifnet *ifp;
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struct mbuf *m;
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{
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/* Nothing. */
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}
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void
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if_nullstart(ifp)
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struct ifnet *ifp;
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{
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/* Nothing. */
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}
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int
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if_nullioctl(ifp, cmd, data)
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struct ifnet *ifp;
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u_long cmd;
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caddr_t data;
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{
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return (ENXIO);
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}
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int
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if_nullinit(ifp)
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struct ifnet *ifp;
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{
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return (ENXIO);
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}
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void
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if_nullstop(ifp, disable)
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struct ifnet *ifp;
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int disable;
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{
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/* Nothing. */
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}
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void
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if_nullwatchdog(ifp)
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struct ifnet *ifp;
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{
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/* Nothing. */
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}
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void
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if_nulldrain(ifp)
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struct ifnet *ifp;
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{
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/* Nothing. */
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}
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int if_index = 0;
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struct ifaddr **ifnet_addrs = NULL;
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struct ifnet **ifindex2ifnet = NULL;
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/*
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* Attach an interface to the
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* list of "active" interfaces.
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*/
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void
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if_attach(ifp)
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struct ifnet *ifp;
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{
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unsigned socksize, ifasize;
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int namelen, masklen;
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struct sockaddr_dl *sdl;
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struct ifaddr *ifa;
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static size_t if_indexlim = 8;
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if (if_index == 0)
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TAILQ_INIT(&ifnet);
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TAILQ_INIT(&ifp->if_addrlist);
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TAILQ_INSERT_TAIL(&ifnet, ifp, if_list);
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ifp->if_index = ++if_index;
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/*
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* We have some arrays that should be indexed by if_index.
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* since if_index will grow dynamically, they should grow too.
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* struct ifadd **ifnet_addrs
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* struct ifnet **ifindex2ifnet
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*/
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if (ifnet_addrs == 0 || ifindex2ifnet == 0 ||
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ifp->if_index >= if_indexlim) {
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size_t n;
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caddr_t q;
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while (ifp->if_index >= if_indexlim)
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if_indexlim <<= 1;
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/* grow ifnet_addrs */
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n = if_indexlim * sizeof(ifa);
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q = (caddr_t)malloc(n, M_IFADDR, M_WAITOK);
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bzero(q, n);
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if (ifnet_addrs) {
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bcopy((caddr_t)ifnet_addrs, q, n/2);
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free((caddr_t)ifnet_addrs, M_IFADDR);
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}
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ifnet_addrs = (struct ifaddr **)q;
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/* grow ifindex2ifnet */
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n = if_indexlim * sizeof(struct ifnet *);
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q = (caddr_t)malloc(n, M_IFADDR, M_WAITOK);
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bzero(q, n);
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if (ifindex2ifnet) {
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bcopy((caddr_t)ifindex2ifnet, q, n/2);
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free((caddr_t)ifindex2ifnet, M_IFADDR);
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}
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ifindex2ifnet = (struct ifnet **)q;
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}
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ifindex2ifnet[ifp->if_index] = ifp;
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/*
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* create a Link Level name for this device
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*/
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namelen = strlen(ifp->if_xname);
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masklen = offsetof(struct sockaddr_dl, sdl_data[0]) + namelen;
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socksize = masklen + ifp->if_addrlen;
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#define ROUNDUP(a) (1 + (((a) - 1) | (sizeof(long) - 1)))
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if (socksize < sizeof(*sdl))
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socksize = sizeof(*sdl);
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socksize = ROUNDUP(socksize);
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ifasize = sizeof(*ifa) + 2 * socksize;
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ifa = (struct ifaddr *)malloc(ifasize, M_IFADDR, M_WAITOK);
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bzero((caddr_t)ifa, ifasize);
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sdl = (struct sockaddr_dl *)(ifa + 1);
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sdl->sdl_len = socksize;
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sdl->sdl_family = AF_LINK;
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bcopy(ifp->if_xname, sdl->sdl_data, namelen);
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sdl->sdl_nlen = namelen;
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sdl->sdl_index = ifp->if_index;
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sdl->sdl_type = ifp->if_type;
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ifnet_addrs[ifp->if_index] = ifa;
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IFAREF(ifa);
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ifa->ifa_ifp = ifp;
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ifa->ifa_rtrequest = link_rtrequest;
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TAILQ_INSERT_HEAD(&ifp->if_addrlist, ifa, ifa_list);
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IFAREF(ifa);
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ifa->ifa_addr = (struct sockaddr *)sdl;
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ifp->if_sadl = sdl;
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sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl);
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ifa->ifa_netmask = (struct sockaddr *)sdl;
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sdl->sdl_len = masklen;
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while (namelen != 0)
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sdl->sdl_data[--namelen] = 0xff;
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if (ifp->if_snd.ifq_maxlen == 0)
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ifp->if_snd.ifq_maxlen = ifqmaxlen;
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ifp->if_broadcastaddr = 0; /* reliably crash if used uninitialized */
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ifp->if_link_state = LINK_STATE_UNKNOWN;
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/* Announce the interface. */
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rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
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}
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/*
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* Deactivate an interface. This points all of the procedure
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* handles at error stubs. May be called from interrupt context.
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*/
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void
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if_deactivate(ifp)
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struct ifnet *ifp;
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{
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int s;
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s = splimp();
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ifp->if_output = if_nulloutput;
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ifp->if_input = if_nullinput;
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ifp->if_start = if_nullstart;
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ifp->if_ioctl = if_nullioctl;
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ifp->if_init = if_nullinit;
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ifp->if_stop = if_nullstop;
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ifp->if_watchdog = if_nullwatchdog;
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ifp->if_drain = if_nulldrain;
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/* No more packets may be enqueued. */
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ifp->if_snd.ifq_maxlen = 0;
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splx(s);
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}
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/*
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* Detach an interface from the list of "active" interfaces,
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* freeing any resources as we go along.
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*
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* NOTE: This routine must be called with a valid thread context,
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* as it may block.
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*/
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void
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if_detach(ifp)
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struct ifnet *ifp;
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{
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struct socket so;
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struct ifaddr *ifa;
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#ifdef IFAREF_DEBUG
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struct ifaddr *last_ifa = NULL;
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#endif
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struct domain *dp;
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struct protosw *pr;
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struct radix_node_head *rnh;
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int s, i, family, purged;
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/*
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* XXX It's kind of lame that we have to have the
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* XXX socket structure...
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*/
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memset(&so, 0, sizeof(so));
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s = splimp();
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/*
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* Do an if_down() to give protocols a chance to do something.
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*/
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if_down(ifp);
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/*
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* Rip all the addresses off the interface. This should make
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* all of the routes go away.
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*/
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while ((ifa = TAILQ_FIRST(&ifp->if_addrlist)) != NULL) {
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family = ifa->ifa_addr->sa_family;
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#ifdef IFAREF_DEBUG
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printf("if_detach: ifaddr %p, family %d, refcnt %d\n",
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ifa, family, ifa->ifa_refcnt);
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if (last_ifa != NULL && ifa == last_ifa)
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panic("if_detach: loop detected");
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last_ifa = ifa;
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#endif
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if (family == AF_LINK) {
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rtinit(ifa, RTM_DELETE, 0);
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TAILQ_REMOVE(&ifp->if_addrlist, ifa, ifa_list);
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IFAFREE(ifa);
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} else {
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dp = pffinddomain(family);
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#ifdef DIAGNOSTIC
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if (dp == NULL)
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panic("if_detach: no domain for AF %d\n",
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family);
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#endif
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purged = 0;
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for (pr = dp->dom_protosw;
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pr < dp->dom_protoswNPROTOSW; pr++) {
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so.so_proto = pr;
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if (pr->pr_usrreq != NULL) {
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(void) (*pr->pr_usrreq)(&so,
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PRU_PURGEIF, NULL, NULL,
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(struct mbuf *) ifp, curproc);
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purged = 1;
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}
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}
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if (purged == 0) {
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/*
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* XXX What's really the best thing to do
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* XXX here? --thorpej@netbsd.org
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*/
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printf("if_detach: WARNING: AF %d not purged\n",
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family);
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}
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}
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}
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/* Walk the routing table looking for straglers. */
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for (i = 0; i <= AF_MAX; i++) {
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if ((rnh = rt_tables[i]) != NULL)
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(void) (*rnh->rnh_walktree)(rnh, if_rt_walktree, ifp);
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}
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IFAFREE(ifnet_addrs[ifp->if_index]);
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ifnet_addrs[ifp->if_index] = NULL;
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/* Announce that the interface is gone. */
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rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
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TAILQ_REMOVE(&ifnet, ifp, if_list);
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splx(s);
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}
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/*
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* Callback for a radix tree walk to delete all references to an
|
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* ifnet.
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*/
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int
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if_rt_walktree(rn, v)
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struct radix_node *rn;
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void *v;
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{
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struct ifnet *ifp = (struct ifnet *)v;
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struct rtentry *rt = (struct rtentry *)rn;
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int error;
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if (rt->rt_ifp == ifp) {
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/* Delete the entry. */
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error = rtrequest(RTM_DELETE, rt_key(rt), rt->rt_gateway,
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rt_mask(rt), rt->rt_flags, NULL);
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if (error)
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printf("%s: warning: unable to delete rtentry @ %p, "
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"error = %d\n", ifp->if_xname, rt, error);
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}
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return (0);
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}
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|
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/*
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* Create a clone network interface.
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*/
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int
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if_clone_create(name)
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const char *name;
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{
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struct if_clone *ifc;
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int unit;
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ifc = if_clone_lookup(name, &unit);
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if (ifc == NULL)
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return (EINVAL);
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|
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if (ifunit(name) != NULL)
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return (EEXIST);
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return ((*ifc->ifc_create)(ifc, unit));
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}
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/*
|
|
* Destroy a clone network interface.
|
|
*/
|
|
int
|
|
if_clone_destroy(name)
|
|
const char *name;
|
|
{
|
|
struct if_clone *ifc;
|
|
struct ifnet *ifp;
|
|
|
|
ifc = if_clone_lookup(name, NULL);
|
|
if (ifc == NULL)
|
|
return (EINVAL);
|
|
|
|
ifp = ifunit(name);
|
|
if (ifp == NULL)
|
|
return (ENXIO);
|
|
|
|
if (ifc->ifc_destroy == NULL)
|
|
return (EOPNOTSUPP);
|
|
|
|
(*ifc->ifc_destroy)(ifp);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Look up a network interface cloner.
|
|
*/
|
|
struct if_clone *
|
|
if_clone_lookup(name, unitp)
|
|
const char *name;
|
|
int *unitp;
|
|
{
|
|
struct if_clone *ifc;
|
|
const char *cp;
|
|
int i;
|
|
|
|
for (ifc = LIST_FIRST(&if_cloners); ifc != NULL;) {
|
|
for (cp = name, i = 0; i < ifc->ifc_namelen; i++, cp++) {
|
|
if (ifc->ifc_name[i] != *cp)
|
|
goto next_ifc;
|
|
}
|
|
goto found_name;
|
|
next_ifc:
|
|
ifc = LIST_NEXT(ifc, ifc_list);
|
|
}
|
|
|
|
/* No match. */
|
|
return (NULL);
|
|
|
|
found_name:
|
|
for (i = 0; *cp != '\0'; cp++) {
|
|
if (*cp < '0' || *cp > '9') {
|
|
/* Bogus unit number. */
|
|
return (NULL);
|
|
}
|
|
i = (i * 10) + (*cp - '0');
|
|
}
|
|
|
|
if (unitp != NULL)
|
|
*unitp = i;
|
|
return (ifc);
|
|
}
|
|
|
|
/*
|
|
* Register a network interface cloner.
|
|
*/
|
|
void
|
|
if_clone_attach(ifc)
|
|
struct if_clone *ifc;
|
|
{
|
|
|
|
LIST_INSERT_HEAD(&if_cloners, ifc, ifc_list);
|
|
if_cloners_count++;
|
|
}
|
|
|
|
/*
|
|
* Unregister a network interface cloner.
|
|
*/
|
|
void
|
|
if_clone_detach(ifc)
|
|
struct if_clone *ifc;
|
|
{
|
|
|
|
LIST_REMOVE(ifc, ifc_list);
|
|
if_cloners_count--;
|
|
}
|
|
|
|
/*
|
|
* Provide list of interface cloners to userspace.
|
|
*/
|
|
int
|
|
if_clone_list(ifcr)
|
|
struct if_clonereq *ifcr;
|
|
{
|
|
char outbuf[IFNAMSIZ], *dst;
|
|
struct if_clone *ifc;
|
|
int count, error = 0;
|
|
|
|
ifcr->ifcr_total = if_cloners_count;
|
|
if ((dst = ifcr->ifcr_buffer) == NULL) {
|
|
/* Just asking how many there are. */
|
|
return (0);
|
|
}
|
|
|
|
if (ifcr->ifcr_count < 0)
|
|
return (EINVAL);
|
|
|
|
count = (if_cloners_count < ifcr->ifcr_count) ?
|
|
if_cloners_count : ifcr->ifcr_count;
|
|
|
|
for (ifc = LIST_FIRST(&if_cloners); ifc != NULL && count != 0;
|
|
ifc = LIST_NEXT(ifc, ifc_list), count--, dst += IFNAMSIZ) {
|
|
strncpy(outbuf, ifc->ifc_name, IFNAMSIZ);
|
|
outbuf[IFNAMSIZ - 1] = '\0'; /* sanity */
|
|
error = copyout(outbuf, dst, IFNAMSIZ);
|
|
if (error)
|
|
break;
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Locate an interface based on a complete address.
|
|
*/
|
|
/*ARGSUSED*/
|
|
struct ifaddr *
|
|
ifa_ifwithaddr(addr)
|
|
struct sockaddr *addr;
|
|
{
|
|
struct ifnet *ifp;
|
|
struct ifaddr *ifa;
|
|
|
|
#define equal(a1, a2) \
|
|
(bcmp((caddr_t)(a1), (caddr_t)(a2), ((struct sockaddr *)(a1))->sa_len) == 0)
|
|
|
|
for (ifp = TAILQ_FIRST(&ifnet); ifp != NULL;
|
|
ifp = TAILQ_NEXT(ifp, if_list)) {
|
|
if (ifp->if_output == if_nulloutput)
|
|
continue;
|
|
for (ifa = TAILQ_FIRST(&ifp->if_addrlist); ifa != NULL;
|
|
ifa = TAILQ_NEXT(ifa, ifa_list)) {
|
|
if (ifa->ifa_addr->sa_family != addr->sa_family)
|
|
continue;
|
|
if (equal(addr, ifa->ifa_addr))
|
|
return (ifa);
|
|
if ((ifp->if_flags & IFF_BROADCAST) &&
|
|
ifa->ifa_broadaddr &&
|
|
/* IP6 doesn't have broadcast */
|
|
ifa->ifa_broadaddr->sa_len != 0 &&
|
|
equal(ifa->ifa_broadaddr, addr))
|
|
return (ifa);
|
|
}
|
|
}
|
|
return (NULL);
|
|
}
|
|
|
|
/*
|
|
* Locate the point to point interface with a given destination address.
|
|
*/
|
|
/*ARGSUSED*/
|
|
struct ifaddr *
|
|
ifa_ifwithdstaddr(addr)
|
|
struct sockaddr *addr;
|
|
{
|
|
struct ifnet *ifp;
|
|
struct ifaddr *ifa;
|
|
|
|
for (ifp = TAILQ_FIRST(&ifnet); ifp != NULL;
|
|
ifp = TAILQ_NEXT(ifp, if_list)) {
|
|
if (ifp->if_output == if_nulloutput)
|
|
continue;
|
|
if (ifp->if_flags & IFF_POINTOPOINT) {
|
|
for (ifa = TAILQ_FIRST(&ifp->if_addrlist); ifa != NULL;
|
|
ifa = TAILQ_NEXT(ifa, ifa_list)) {
|
|
if (ifa->ifa_addr->sa_family !=
|
|
addr->sa_family ||
|
|
ifa->ifa_dstaddr == NULL)
|
|
continue;
|
|
if (equal(addr, ifa->ifa_dstaddr))
|
|
return (ifa);
|
|
}
|
|
}
|
|
}
|
|
return (NULL);
|
|
}
|
|
|
|
/*
|
|
* Find an interface on a specific network. If many, choice
|
|
* is most specific found.
|
|
*/
|
|
struct ifaddr *
|
|
ifa_ifwithnet(addr)
|
|
struct sockaddr *addr;
|
|
{
|
|
struct ifnet *ifp;
|
|
struct ifaddr *ifa;
|
|
struct sockaddr_dl *sdl;
|
|
struct ifaddr *ifa_maybe = 0;
|
|
u_int af = addr->sa_family;
|
|
char *addr_data = addr->sa_data, *cplim;
|
|
|
|
if (af == AF_LINK) {
|
|
sdl = (struct sockaddr_dl *)addr;
|
|
if (sdl->sdl_index && sdl->sdl_index <= if_index &&
|
|
ifindex2ifnet[sdl->sdl_index]->if_output != if_nulloutput)
|
|
return (ifnet_addrs[sdl->sdl_index]);
|
|
}
|
|
#ifdef NETATALK
|
|
if (af == AF_APPLETALK) {
|
|
struct sockaddr_at *sat, *sat2;
|
|
sat = (struct sockaddr_at *)addr;
|
|
for (ifp = TAILQ_FIRST(&ifnet); ifp != NULL;
|
|
ifp = TAILQ_NEXT(ifp, if_list)) {
|
|
if (ifp->if_output == if_nulloutput)
|
|
continue;
|
|
ifa = at_ifawithnet((struct sockaddr_at *)addr, ifp);
|
|
if (ifa == NULL)
|
|
continue;
|
|
sat2 = (struct sockaddr_at *)ifa->ifa_addr;
|
|
if (sat2->sat_addr.s_net == sat->sat_addr.s_net)
|
|
return (ifa); /* exact match */
|
|
if (ifa_maybe == NULL) {
|
|
/* else keep the if with the rigth range */
|
|
ifa_maybe = ifa;
|
|
}
|
|
}
|
|
return (ifa_maybe);
|
|
}
|
|
#endif
|
|
for (ifp = TAILQ_FIRST(&ifnet); ifp != NULL;
|
|
ifp = TAILQ_NEXT(ifp, if_list)) {
|
|
if (ifp->if_output == if_nulloutput)
|
|
continue;
|
|
for (ifa = TAILQ_FIRST(&ifp->if_addrlist); ifa != NULL;
|
|
ifa = TAILQ_NEXT(ifa, ifa_list)) {
|
|
char *cp, *cp2, *cp3;
|
|
|
|
if (ifa->ifa_addr->sa_family != af ||
|
|
ifa->ifa_netmask == 0)
|
|
next: continue;
|
|
cp = addr_data;
|
|
cp2 = ifa->ifa_addr->sa_data;
|
|
cp3 = ifa->ifa_netmask->sa_data;
|
|
cplim = (char *)ifa->ifa_netmask +
|
|
ifa->ifa_netmask->sa_len;
|
|
while (cp3 < cplim) {
|
|
if ((*cp++ ^ *cp2++) & *cp3++) {
|
|
/* want to continue for() loop */
|
|
goto next;
|
|
}
|
|
}
|
|
if (ifa_maybe == 0 ||
|
|
rn_refines((caddr_t)ifa->ifa_netmask,
|
|
(caddr_t)ifa_maybe->ifa_netmask))
|
|
ifa_maybe = ifa;
|
|
}
|
|
}
|
|
return (ifa_maybe);
|
|
}
|
|
|
|
/*
|
|
* Find the interface of the addresss.
|
|
*/
|
|
struct ifaddr *
|
|
ifa_ifwithladdr(addr)
|
|
struct sockaddr *addr;
|
|
{
|
|
struct ifaddr *ia;
|
|
|
|
if ((ia = ifa_ifwithaddr(addr)) || (ia = ifa_ifwithdstaddr(addr)) ||
|
|
(ia = ifa_ifwithnet(addr)))
|
|
return (ia);
|
|
return (NULL);
|
|
}
|
|
|
|
/*
|
|
* Find an interface using a specific address family
|
|
*/
|
|
struct ifaddr *
|
|
ifa_ifwithaf(af)
|
|
int af;
|
|
{
|
|
struct ifnet *ifp;
|
|
struct ifaddr *ifa;
|
|
|
|
for (ifp = TAILQ_FIRST(&ifnet); ifp != NULL;
|
|
ifp = TAILQ_NEXT(ifp, if_list)) {
|
|
if (ifp->if_output == if_nulloutput)
|
|
continue;
|
|
for (ifa = TAILQ_FIRST(&ifp->if_addrlist); ifa != NULL;
|
|
ifa = TAILQ_NEXT(ifa, ifa_list)) {
|
|
if (ifa->ifa_addr->sa_family == af)
|
|
return (ifa);
|
|
}
|
|
}
|
|
return (NULL);
|
|
}
|
|
|
|
/*
|
|
* Find an interface address specific to an interface best matching
|
|
* a given address.
|
|
*/
|
|
struct ifaddr *
|
|
ifaof_ifpforaddr(addr, ifp)
|
|
struct sockaddr *addr;
|
|
struct ifnet *ifp;
|
|
{
|
|
struct ifaddr *ifa;
|
|
char *cp, *cp2, *cp3;
|
|
char *cplim;
|
|
struct ifaddr *ifa_maybe = 0;
|
|
u_int af = addr->sa_family;
|
|
|
|
if (ifp->if_output == if_nulloutput)
|
|
return (NULL);
|
|
|
|
if (af >= AF_MAX)
|
|
return (NULL);
|
|
|
|
for (ifa = TAILQ_FIRST(&ifp->if_addrlist); ifa != NULL;
|
|
ifa = TAILQ_NEXT(ifa, ifa_list)) {
|
|
if (ifa->ifa_addr->sa_family != af)
|
|
continue;
|
|
ifa_maybe = ifa;
|
|
if (ifa->ifa_netmask == 0) {
|
|
if (equal(addr, ifa->ifa_addr) ||
|
|
(ifa->ifa_dstaddr &&
|
|
equal(addr, ifa->ifa_dstaddr)))
|
|
return (ifa);
|
|
continue;
|
|
}
|
|
cp = addr->sa_data;
|
|
cp2 = ifa->ifa_addr->sa_data;
|
|
cp3 = ifa->ifa_netmask->sa_data;
|
|
cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask;
|
|
for (; cp3 < cplim; cp3++) {
|
|
if ((*cp++ ^ *cp2++) & *cp3)
|
|
break;
|
|
}
|
|
if (cp3 == cplim)
|
|
return (ifa);
|
|
}
|
|
return (ifa_maybe);
|
|
}
|
|
|
|
/*
|
|
* Default action when installing a route with a Link Level gateway.
|
|
* Lookup an appropriate real ifa to point to.
|
|
* This should be moved to /sys/net/link.c eventually.
|
|
*/
|
|
void
|
|
link_rtrequest(cmd, rt, sa)
|
|
int cmd;
|
|
struct rtentry *rt;
|
|
struct sockaddr *sa;
|
|
{
|
|
struct ifaddr *ifa;
|
|
struct sockaddr *dst;
|
|
struct ifnet *ifp;
|
|
|
|
if (cmd != RTM_ADD || ((ifa = rt->rt_ifa) == 0) ||
|
|
((ifp = ifa->ifa_ifp) == 0) || ((dst = rt_key(rt)) == 0))
|
|
return;
|
|
if ((ifa = ifaof_ifpforaddr(dst, ifp)) != NULL) {
|
|
IFAFREE(rt->rt_ifa);
|
|
rt->rt_ifa = ifa;
|
|
IFAREF(ifa);
|
|
if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest)
|
|
ifa->ifa_rtrequest(cmd, rt, sa);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Mark an interface down and notify protocols of
|
|
* the transition.
|
|
* NOTE: must be called at splsoftnet or equivalent.
|
|
*/
|
|
void
|
|
if_down(ifp)
|
|
struct ifnet *ifp;
|
|
{
|
|
struct ifaddr *ifa;
|
|
|
|
ifp->if_flags &= ~IFF_UP;
|
|
for (ifa = TAILQ_FIRST(&ifp->if_addrlist); ifa != NULL;
|
|
ifa = TAILQ_NEXT(ifa, ifa_list))
|
|
pfctlinput(PRC_IFDOWN, ifa->ifa_addr);
|
|
if_qflush(&ifp->if_snd);
|
|
rt_ifmsg(ifp);
|
|
}
|
|
|
|
/*
|
|
* Mark an interface up and notify protocols of
|
|
* the transition.
|
|
* NOTE: must be called at splsoftnet or equivalent.
|
|
*/
|
|
void
|
|
if_up(ifp)
|
|
struct ifnet *ifp;
|
|
{
|
|
#ifdef notyet
|
|
struct ifaddr *ifa;
|
|
#endif
|
|
|
|
ifp->if_flags |= IFF_UP;
|
|
#ifdef notyet
|
|
/* this has no effect on IP, and will kill all ISO connections XXX */
|
|
for (ifa = TAILQ_FIRST(&ifp->if_addrlist); ifa != NULL;
|
|
ifa = TAILQ_NEXT(ifa, ifa_list))
|
|
pfctlinput(PRC_IFUP, ifa->ifa_addr);
|
|
#endif
|
|
rt_ifmsg(ifp);
|
|
#ifdef INET6
|
|
in6_if_up(ifp);
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Flush an interface queue.
|
|
*/
|
|
void
|
|
if_qflush(ifq)
|
|
struct ifqueue *ifq;
|
|
{
|
|
|
|
IFQ_PURGE(ifq);
|
|
}
|
|
|
|
/*
|
|
* Handle interface watchdog timer routines. Called
|
|
* from softclock, we decrement timers (if set) and
|
|
* call the appropriate interface routine on expiration.
|
|
*/
|
|
void
|
|
if_slowtimo(arg)
|
|
void *arg;
|
|
{
|
|
struct ifnet *ifp;
|
|
int s = splimp();
|
|
|
|
for (ifp = TAILQ_FIRST(&ifnet); ifp != NULL;
|
|
ifp = TAILQ_NEXT(ifp, if_list)) {
|
|
if (ifp->if_timer == 0 || --ifp->if_timer)
|
|
continue;
|
|
if (ifp->if_watchdog)
|
|
(*ifp->if_watchdog)(ifp);
|
|
}
|
|
splx(s);
|
|
callout_reset(&if_slowtimo_ch, hz / IFNET_SLOWHZ,
|
|
if_slowtimo, NULL);
|
|
}
|
|
|
|
/*
|
|
* Set/clear promiscuous mode on interface ifp based on the truth value
|
|
* of pswitch. The calls are reference counted so that only the first
|
|
* "on" request actually has an effect, as does the final "off" request.
|
|
* Results are undefined if the "off" and "on" requests are not matched.
|
|
*/
|
|
int
|
|
ifpromisc(ifp, pswitch)
|
|
struct ifnet *ifp;
|
|
int pswitch;
|
|
{
|
|
int pcount, ret;
|
|
short flags;
|
|
struct ifreq ifr;
|
|
|
|
pcount = ifp->if_pcount;
|
|
flags = ifp->if_flags;
|
|
if (pswitch) {
|
|
/*
|
|
* Allow the device to be "placed" into promiscuous
|
|
* mode even if it is not configured up. It will
|
|
* consult IFF_PROMISC when it is is brought up.
|
|
*/
|
|
if (ifp->if_pcount++ != 0)
|
|
return (0);
|
|
ifp->if_flags |= IFF_PROMISC;
|
|
if ((ifp->if_flags & IFF_UP) == 0)
|
|
return (0);
|
|
} else {
|
|
if (--ifp->if_pcount > 0)
|
|
return (0);
|
|
ifp->if_flags &= ~IFF_PROMISC;
|
|
/*
|
|
* If the device is not configured up, we should not need to
|
|
* turn off promiscuous mode (device should have turned it
|
|
* off when interface went down; and will look at IFF_PROMISC
|
|
* again next time interface comes up).
|
|
*/
|
|
if ((ifp->if_flags & IFF_UP) == 0)
|
|
return (0);
|
|
}
|
|
memset(&ifr, 0, sizeof(ifr));
|
|
ifr.ifr_flags = ifp->if_flags;
|
|
ret = (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t) &ifr);
|
|
/* Restore interface state if not successful. */
|
|
if (ret != 0) {
|
|
ifp->if_pcount = pcount;
|
|
ifp->if_flags = flags;
|
|
}
|
|
return (ret);
|
|
}
|
|
|
|
/*
|
|
* Map interface name to
|
|
* interface structure pointer.
|
|
*/
|
|
struct ifnet *
|
|
ifunit(name)
|
|
const char *name;
|
|
{
|
|
struct ifnet *ifp;
|
|
|
|
for (ifp = TAILQ_FIRST(&ifnet); ifp != NULL;
|
|
ifp = TAILQ_NEXT(ifp, if_list)) {
|
|
if (ifp->if_output == if_nulloutput)
|
|
continue;
|
|
if (strcmp(ifp->if_xname, name) == 0)
|
|
return (ifp);
|
|
}
|
|
return (NULL);
|
|
}
|
|
|
|
/*
|
|
* Interface ioctls.
|
|
*/
|
|
int
|
|
ifioctl(so, cmd, data, p)
|
|
struct socket *so;
|
|
u_long cmd;
|
|
caddr_t data;
|
|
struct proc *p;
|
|
{
|
|
struct ifnet *ifp;
|
|
struct ifreq *ifr;
|
|
int error = 0;
|
|
short oif_flags;
|
|
|
|
switch (cmd) {
|
|
|
|
case SIOCGIFCONF:
|
|
case OSIOCGIFCONF:
|
|
return (ifconf(cmd, data));
|
|
}
|
|
ifr = (struct ifreq *)data;
|
|
|
|
switch (cmd) {
|
|
case SIOCIFCREATE:
|
|
case SIOCIFDESTROY:
|
|
if ((error = suser(p->p_ucred, &p->p_acflag)) != 0)
|
|
return (error);
|
|
return ((cmd == SIOCIFCREATE) ?
|
|
if_clone_create(ifr->ifr_name) :
|
|
if_clone_destroy(ifr->ifr_name));
|
|
|
|
case SIOCIFGCLONERS:
|
|
return (if_clone_list((struct if_clonereq *)data));
|
|
}
|
|
|
|
ifp = ifunit(ifr->ifr_name);
|
|
if (ifp == 0)
|
|
return (ENXIO);
|
|
oif_flags = ifp->if_flags;
|
|
switch (cmd) {
|
|
|
|
case SIOCGIFFLAGS:
|
|
ifr->ifr_flags = ifp->if_flags;
|
|
break;
|
|
|
|
case SIOCGIFMETRIC:
|
|
ifr->ifr_metric = ifp->if_metric;
|
|
break;
|
|
|
|
case SIOCGIFMTU:
|
|
ifr->ifr_mtu = ifp->if_mtu;
|
|
break;
|
|
|
|
case SIOCSIFFLAGS:
|
|
if ((error = suser(p->p_ucred, &p->p_acflag)) != 0)
|
|
return (error);
|
|
if (ifp->if_flags & IFF_UP && (ifr->ifr_flags & IFF_UP) == 0) {
|
|
int s = splimp();
|
|
if_down(ifp);
|
|
splx(s);
|
|
}
|
|
if (ifr->ifr_flags & IFF_UP && (ifp->if_flags & IFF_UP) == 0) {
|
|
int s = splimp();
|
|
if_up(ifp);
|
|
splx(s);
|
|
}
|
|
ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) |
|
|
(ifr->ifr_flags &~ IFF_CANTCHANGE);
|
|
if (ifp->if_ioctl)
|
|
(void) (*ifp->if_ioctl)(ifp, cmd, data);
|
|
break;
|
|
|
|
case SIOCSIFMETRIC:
|
|
if ((error = suser(p->p_ucred, &p->p_acflag)) != 0)
|
|
return (error);
|
|
ifp->if_metric = ifr->ifr_metric;
|
|
break;
|
|
|
|
case SIOCSIFMTU:
|
|
{
|
|
u_long oldmtu = ifp->if_mtu;
|
|
|
|
error = suser(p->p_ucred, &p->p_acflag);
|
|
if (error)
|
|
return (error);
|
|
if (ifp->if_ioctl == NULL)
|
|
return (EOPNOTSUPP);
|
|
error = (*ifp->if_ioctl)(ifp, cmd, data);
|
|
|
|
/*
|
|
* If the link MTU changed, do network layer specific procedure.
|
|
*/
|
|
if (ifp->if_mtu != oldmtu) {
|
|
#ifdef INET6
|
|
nd6_setmtu(ifp);
|
|
#endif
|
|
}
|
|
break;
|
|
}
|
|
case SIOCSIFPHYADDR:
|
|
case SIOCDIFPHYADDR:
|
|
#ifdef INET6
|
|
case SIOCSIFPHYADDR_IN6:
|
|
#endif
|
|
case SIOCADDMULTI:
|
|
case SIOCDELMULTI:
|
|
case SIOCSIFMEDIA:
|
|
if ((error = suser(p->p_ucred, &p->p_acflag)) != 0)
|
|
return (error);
|
|
/* FALLTHROUGH */
|
|
case SIOCGIFPSRCADDR:
|
|
case SIOCGIFPDSTADDR:
|
|
case SIOCGIFMEDIA:
|
|
if (ifp->if_ioctl == 0)
|
|
return (EOPNOTSUPP);
|
|
error = (*ifp->if_ioctl)(ifp, cmd, data);
|
|
break;
|
|
|
|
case SIOCSDRVSPEC:
|
|
case SIOCS80211NWID:
|
|
case SIOCS80211NWKEY:
|
|
case SIOCS80211POWER:
|
|
/* XXX: need to pass proc pointer through to driver... */
|
|
if ((error = suser(p->p_ucred, &p->p_acflag)) != 0)
|
|
return (error);
|
|
/* FALLTHROUGH */
|
|
default:
|
|
if (so->so_proto == 0)
|
|
return (EOPNOTSUPP);
|
|
#if !defined(COMPAT_43) && !defined(COMPAT_LINUX) && !defined(COMPAT_SVR4)
|
|
error = ((*so->so_proto->pr_usrreq)(so, PRU_CONTROL,
|
|
(struct mbuf *)cmd, (struct mbuf *)data,
|
|
(struct mbuf *)ifp, p));
|
|
#else
|
|
{
|
|
int ocmd = cmd;
|
|
|
|
switch (cmd) {
|
|
|
|
case SIOCSIFADDR:
|
|
case SIOCSIFDSTADDR:
|
|
case SIOCSIFBRDADDR:
|
|
case SIOCSIFNETMASK:
|
|
#if BYTE_ORDER != BIG_ENDIAN
|
|
if (ifr->ifr_addr.sa_family == 0 &&
|
|
ifr->ifr_addr.sa_len < 16) {
|
|
ifr->ifr_addr.sa_family = ifr->ifr_addr.sa_len;
|
|
ifr->ifr_addr.sa_len = 16;
|
|
}
|
|
#else
|
|
if (ifr->ifr_addr.sa_len == 0)
|
|
ifr->ifr_addr.sa_len = 16;
|
|
#endif
|
|
break;
|
|
|
|
case OSIOCGIFADDR:
|
|
cmd = SIOCGIFADDR;
|
|
break;
|
|
|
|
case OSIOCGIFDSTADDR:
|
|
cmd = SIOCGIFDSTADDR;
|
|
break;
|
|
|
|
case OSIOCGIFBRDADDR:
|
|
cmd = SIOCGIFBRDADDR;
|
|
break;
|
|
|
|
case OSIOCGIFNETMASK:
|
|
cmd = SIOCGIFNETMASK;
|
|
}
|
|
|
|
error = ((*so->so_proto->pr_usrreq)(so, PRU_CONTROL,
|
|
(struct mbuf *)cmd, (struct mbuf *)data,
|
|
(struct mbuf *)ifp, p));
|
|
|
|
switch (ocmd) {
|
|
case OSIOCGIFADDR:
|
|
case OSIOCGIFDSTADDR:
|
|
case OSIOCGIFBRDADDR:
|
|
case OSIOCGIFNETMASK:
|
|
*(u_int16_t *)&ifr->ifr_addr = ifr->ifr_addr.sa_family;
|
|
}
|
|
}
|
|
#endif /* COMPAT_43 */
|
|
break;
|
|
}
|
|
|
|
if (((oif_flags ^ ifp->if_flags) & IFF_UP) != 0) {
|
|
#ifdef INET6
|
|
if ((ifp->if_flags & IFF_UP) != 0) {
|
|
int s = splimp();
|
|
in6_if_up(ifp);
|
|
splx(s);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Return interface configuration
|
|
* of system. List may be used
|
|
* in later ioctl's (above) to get
|
|
* other information.
|
|
*/
|
|
/*ARGSUSED*/
|
|
int
|
|
ifconf(cmd, data)
|
|
u_long cmd;
|
|
caddr_t data;
|
|
{
|
|
struct ifconf *ifc = (struct ifconf *)data;
|
|
struct ifnet *ifp;
|
|
struct ifaddr *ifa;
|
|
struct ifreq ifr, *ifrp;
|
|
int space = ifc->ifc_len, error = 0;
|
|
|
|
ifrp = ifc->ifc_req;
|
|
for (ifp = ifnet.tqh_first; ifp != 0; ifp = ifp->if_list.tqe_next) {
|
|
bcopy(ifp->if_xname, ifr.ifr_name, IFNAMSIZ);
|
|
if ((ifa = ifp->if_addrlist.tqh_first) == 0) {
|
|
bzero((caddr_t)&ifr.ifr_addr, sizeof(ifr.ifr_addr));
|
|
if (space >= (int)sizeof (ifr)) {
|
|
error = copyout((caddr_t)&ifr, (caddr_t)ifrp,
|
|
sizeof(ifr));
|
|
if (error)
|
|
break;
|
|
}
|
|
space -= sizeof (ifr), ifrp++;
|
|
} else
|
|
for (; ifa != 0; ifa = ifa->ifa_list.tqe_next) {
|
|
struct sockaddr *sa = ifa->ifa_addr;
|
|
#if defined(COMPAT_43) || defined(COMPAT_LINUX) || defined(COMPAT_SVR4)
|
|
if (cmd == OSIOCGIFCONF) {
|
|
struct osockaddr *osa =
|
|
(struct osockaddr *)&ifr.ifr_addr;
|
|
ifr.ifr_addr = *sa;
|
|
osa->sa_family = sa->sa_family;
|
|
if (space >= (int)sizeof (ifr)) {
|
|
error = copyout((caddr_t)&ifr,
|
|
(caddr_t)ifrp,
|
|
sizeof (ifr));
|
|
ifrp++;
|
|
}
|
|
} else
|
|
#endif
|
|
if (sa->sa_len <= sizeof(*sa)) {
|
|
ifr.ifr_addr = *sa;
|
|
if (space >= (int)sizeof (ifr)) {
|
|
error = copyout((caddr_t)&ifr,
|
|
(caddr_t)ifrp,
|
|
sizeof (ifr));
|
|
ifrp++;
|
|
}
|
|
} else {
|
|
space -= sa->sa_len - sizeof(*sa);
|
|
if (space >= (int)sizeof (ifr)) {
|
|
error = copyout((caddr_t)&ifr,
|
|
(caddr_t)ifrp,
|
|
sizeof (ifr.ifr_name));
|
|
if (error == 0) {
|
|
error = copyout((caddr_t)sa,
|
|
(caddr_t)&ifrp->ifr_addr,
|
|
sa->sa_len);
|
|
}
|
|
ifrp = (struct ifreq *)
|
|
(sa->sa_len +
|
|
(caddr_t)&ifrp->ifr_addr);
|
|
}
|
|
}
|
|
if (error)
|
|
break;
|
|
space -= sizeof (ifr);
|
|
}
|
|
}
|
|
ifc->ifc_len -= space;
|
|
return (error);
|
|
}
|