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//==========================================================================
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//
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// src/sys/netinet6/icmp6.c
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//
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//==========================================================================
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//####BSDCOPYRIGHTBEGIN####
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//
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// -------------------------------------------
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//
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// Portions of this software may have been derived from OpenBSD,
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// FreeBSD or other sources, and are covered by the appropriate
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// copyright disclaimers included herein.
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//
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// Portions created by Red Hat are
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// Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
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//
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// -------------------------------------------
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//
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//####BSDCOPYRIGHTEND####
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//==========================================================================
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/* $KAME: icmp6.c,v 1.269 2001/12/18 02:19:16 jinmei Exp $ */
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/*
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* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1982, 1986, 1988, 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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| 75 |
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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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* @(#)ip_icmp.c 8.2 (Berkeley) 1/4/94
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*/
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#include <sys/param.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/socketvar.h>
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#include <sys/domain.h>
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#include <net/if.h>
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#include <net/route.h>
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#include <net/if_dl.h>
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#include <net/if_types.h>
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#include <netinet/in.h>
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#include <netinet/in_var.h>
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#if defined(__OpenBSD__) || (defined(__bsdi__) && _BSDI_VERSION >= 199802)
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#include <netinet/in_systm.h>
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#include <netinet/ip.h>
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#endif
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#include <netinet/ip6.h>
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#include <netinet6/ip6_var.h>
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#include <netinet/icmp6.h>
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#include <netinet6/mld6_var.h>
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#if defined(__FreeBSD__) && __FreeBSD__ >= 3
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#include <netinet/in_pcb.h>
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#include <netinet6/in6_pcb.h>
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#elif defined(__OpenBSD__) || (defined(__bsdi__) && _BSDI_VERSION >= 199802)
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#include <netinet/in_pcb.h>
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#else
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#include <netinet6/in6_pcb.h>
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#endif
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#include <netinet6/nd6.h>
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#include <netinet6/in6_ifattach.h>
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#include <netinet6/ip6protosw.h>
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#ifdef __OpenBSD__ /* KAME IPSEC */
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#undef IPSEC
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#endif
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#ifdef IPSEC
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#include <netinet6/ipsec.h>
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#include <netkey/key.h>
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#endif
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#ifdef MIP6
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#include <netinet6/mip6.h>
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#endif
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#ifdef HAVE_NRL_INPCB
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/* inpcb members */
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#define in6pcb inpcb
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#define in6p_laddr inp_laddr6
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#define in6p_faddr inp_faddr6
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#define in6p_icmp6filt inp_icmp6filt
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#define in6p_route inp_route
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#define in6p_socket inp_socket
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#define in6p_flags inp_flags
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#define in6p_moptions inp_moptions6
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#define in6p_outputopts inp_outputopts6
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#define in6p_ip6 inp_ipv6
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#define in6p_flowinfo inp_flowinfo
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#define in6p_sp inp_sp
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#define in6p_next inp_next
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#define in6p_prev inp_prev
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/*
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* for KAME src sync over BSD*'s. XXX: FreeBSD (>=3) are VERY different from
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* others...
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*/
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#define in6p_ip6_nxt inp_ipv6.ip6_nxt
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#endif
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extern struct domain inet6domain;
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extern struct ip6protosw inet6sw[];
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extern u_char ip6_protox[];
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struct icmp6stat icmp6stat;
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#if defined (__OpenBSD__)
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extern struct inpcbtable rawin6pcbtable;
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#elif !(defined(__FreeBSD__) && __FreeBSD__ >= 3)
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extern struct in6pcb rawin6pcb;
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#else
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extern struct inpcbhead ripcb;
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#endif
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extern int icmp6errppslim;
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static int icmp6errpps_count = 0;
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static struct timeval icmp6errppslim_last;
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extern int icmp6_nodeinfo;
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#if defined(__NetBSD__) || defined(__OpenBSD__)
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/*
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* List of callbacks to notify when Path MTU changes are made.
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*/
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struct icmp6_mtudisc_callback {
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LIST_ENTRY(icmp6_mtudisc_callback) mc_list;
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void (*mc_func) __P((struct in6_addr *));
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};
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LIST_HEAD(, icmp6_mtudisc_callback) icmp6_mtudisc_callbacks =
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LIST_HEAD_INITIALIZER(&icmp6_mtudisc_callbacks);
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static struct rttimer_queue *icmp6_mtudisc_timeout_q = NULL;
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extern int pmtu_expire;
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/* XXX do these values make any sense? */
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static int icmp6_mtudisc_hiwat = 1280;
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static int icmp6_mtudisc_lowat = 256;
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/*
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* keep track of # of redirect routes.
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*/
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static struct rttimer_queue *icmp6_redirect_timeout_q = NULL;
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/* XXX do these values make any sense? */
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static int icmp6_redirect_hiwat = 1280;
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static int icmp6_redirect_lowat = 1024;
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#endif
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static void icmp6_errcount __P((struct icmp6errstat *, int, int));
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static int icmp6_rip6_input __P((struct mbuf **, int));
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static int icmp6_ratelimit __P((const struct in6_addr *, const int, const int));
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static const char *icmp6_redirect_diag __P((struct in6_addr *,
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struct in6_addr *, struct in6_addr *));
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#ifndef HAVE_PPSRATECHECK
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static int ppsratecheck __P((struct timeval *, int *, int));
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#endif
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static struct mbuf *ni6_input __P((struct mbuf *, int));
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static struct mbuf *ni6_nametodns __P((const char *, int, int));
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static int ni6_dnsmatch __P((const char *, int, const char *, int));
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static int ni6_addrs __P((struct icmp6_nodeinfo *, struct mbuf *,
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struct ifnet **, char *));
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static int ni6_store_addrs __P((struct icmp6_nodeinfo *, struct icmp6_nodeinfo *,
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struct ifnet *, int));
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static int icmp6_notify_error __P((struct mbuf *, int, int, int));
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static int icmp6_recover_src __P((struct mbuf *));
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#if defined(__NetBSD__) || defined(__OpenBSD__)
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static struct rtentry *icmp6_mtudisc_clone __P((struct sockaddr *));
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static void icmp6_mtudisc_timeout __P((struct rtentry *, struct rttimer *));
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static void icmp6_redirect_timeout __P((struct rtentry *, struct rttimer *));
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#endif
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void
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icmp6_init()
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{
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mld6_init();
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#if defined(__NetBSD__) || defined(__OpenBSD__)
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icmp6_mtudisc_timeout_q = rt_timer_queue_create(pmtu_expire);
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icmp6_redirect_timeout_q = rt_timer_queue_create(icmp6_redirtimeout);
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#endif
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| 237 |
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}
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| 239 |
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static void
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| 240 |
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icmp6_errcount(stat, type, code)
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| 241 |
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struct icmp6errstat *stat;
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| 242 |
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int type, code;
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| 243 |
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{
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| 244 |
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switch (type) {
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| 245 |
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case ICMP6_DST_UNREACH:
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switch (code) {
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| 247 |
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case ICMP6_DST_UNREACH_NOROUTE:
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| 248 |
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stat->icp6errs_dst_unreach_noroute++;
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| 249 |
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return;
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| 250 |
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case ICMP6_DST_UNREACH_ADMIN:
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| 251 |
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stat->icp6errs_dst_unreach_admin++;
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| 252 |
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return;
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| 253 |
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case ICMP6_DST_UNREACH_BEYONDSCOPE:
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| 254 |
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stat->icp6errs_dst_unreach_beyondscope++;
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| 255 |
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return;
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| 256 |
|
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case ICMP6_DST_UNREACH_ADDR:
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| 257 |
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stat->icp6errs_dst_unreach_addr++;
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| 258 |
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return;
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| 259 |
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case ICMP6_DST_UNREACH_NOPORT:
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| 260 |
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stat->icp6errs_dst_unreach_noport++;
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| 261 |
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return;
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| 262 |
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}
|
| 263 |
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break;
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| 264 |
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case ICMP6_PACKET_TOO_BIG:
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| 265 |
|
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stat->icp6errs_packet_too_big++;
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| 266 |
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return;
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| 267 |
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case ICMP6_TIME_EXCEEDED:
|
| 268 |
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switch (code) {
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| 269 |
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case ICMP6_TIME_EXCEED_TRANSIT:
|
| 270 |
|
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stat->icp6errs_time_exceed_transit++;
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| 271 |
|
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return;
|
| 272 |
|
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case ICMP6_TIME_EXCEED_REASSEMBLY:
|
| 273 |
|
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stat->icp6errs_time_exceed_reassembly++;
|
| 274 |
|
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return;
|
| 275 |
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}
|
| 276 |
|
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break;
|
| 277 |
|
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case ICMP6_PARAM_PROB:
|
| 278 |
|
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switch (code) {
|
| 279 |
|
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case ICMP6_PARAMPROB_HEADER:
|
| 280 |
|
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stat->icp6errs_paramprob_header++;
|
| 281 |
|
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return;
|
| 282 |
|
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case ICMP6_PARAMPROB_NEXTHEADER:
|
| 283 |
|
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stat->icp6errs_paramprob_nextheader++;
|
| 284 |
|
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return;
|
| 285 |
|
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case ICMP6_PARAMPROB_OPTION:
|
| 286 |
|
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stat->icp6errs_paramprob_option++;
|
| 287 |
|
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return;
|
| 288 |
|
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}
|
| 289 |
|
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break;
|
| 290 |
|
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case ND_REDIRECT:
|
| 291 |
|
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stat->icp6errs_redirect++;
|
| 292 |
|
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return;
|
| 293 |
|
|
}
|
| 294 |
|
|
stat->icp6errs_unknown++;
|
| 295 |
|
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}
|
| 296 |
|
|
|
| 297 |
|
|
#if defined(__NetBSD__) || defined(__OpenBSD__)
|
| 298 |
|
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/*
|
| 299 |
|
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* Register a Path MTU Discovery callback.
|
| 300 |
|
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*/
|
| 301 |
|
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void
|
| 302 |
|
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icmp6_mtudisc_callback_register(func)
|
| 303 |
|
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void (*func) __P((struct in6_addr *));
|
| 304 |
|
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{
|
| 305 |
|
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struct icmp6_mtudisc_callback *mc;
|
| 306 |
|
|
|
| 307 |
|
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for (mc = LIST_FIRST(&icmp6_mtudisc_callbacks); mc != NULL;
|
| 308 |
|
|
mc = LIST_NEXT(mc, mc_list)) {
|
| 309 |
|
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if (mc->mc_func == func)
|
| 310 |
|
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return;
|
| 311 |
|
|
}
|
| 312 |
|
|
|
| 313 |
|
|
mc = malloc(sizeof(*mc), M_PCB, M_NOWAIT);
|
| 314 |
|
|
if (mc == NULL)
|
| 315 |
|
|
panic("icmp6_mtudisc_callback_register");
|
| 316 |
|
|
|
| 317 |
|
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mc->mc_func = func;
|
| 318 |
|
|
LIST_INSERT_HEAD(&icmp6_mtudisc_callbacks, mc, mc_list);
|
| 319 |
|
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}
|
| 320 |
|
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#endif
|
| 321 |
|
|
|
| 322 |
|
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/*
|
| 323 |
|
|
* Generate an error packet of type error in response to bad IP6 packet.
|
| 324 |
|
|
*/
|
| 325 |
|
|
void
|
| 326 |
|
|
icmp6_error(m, type, code, param)
|
| 327 |
|
|
struct mbuf *m;
|
| 328 |
|
|
int type, code, param;
|
| 329 |
|
|
{
|
| 330 |
|
|
struct ip6_hdr *oip6, *nip6;
|
| 331 |
|
|
struct icmp6_hdr *icmp6;
|
| 332 |
|
|
struct mbuf *n;
|
| 333 |
|
|
struct ip6aux *ip6a;
|
| 334 |
|
|
struct in6_addr nip6_src, *nip6_srcp;
|
| 335 |
|
|
u_int preplen;
|
| 336 |
|
|
int off;
|
| 337 |
|
|
int nxt;
|
| 338 |
|
|
|
| 339 |
|
|
icmp6stat.icp6s_error++;
|
| 340 |
|
|
|
| 341 |
|
|
/* count per-type-code statistics */
|
| 342 |
|
|
icmp6_errcount(&icmp6stat.icp6s_outerrhist, type, code);
|
| 343 |
|
|
|
| 344 |
|
|
#ifdef M_DECRYPTED /* not openbsd */
|
| 345 |
|
|
if (m->m_flags & M_DECRYPTED) {
|
| 346 |
|
|
icmp6stat.icp6s_canterror++;
|
| 347 |
|
|
goto freeit;
|
| 348 |
|
|
}
|
| 349 |
|
|
#endif
|
| 350 |
|
|
|
| 351 |
|
|
#ifndef PULLDOWN_TEST
|
| 352 |
|
|
IP6_EXTHDR_CHECK(m, 0, sizeof(struct ip6_hdr), );
|
| 353 |
|
|
#else
|
| 354 |
|
|
if (m->m_len < sizeof(struct ip6_hdr)) {
|
| 355 |
|
|
m = m_pullup(m, sizeof(struct ip6_hdr));
|
| 356 |
|
|
if (m == NULL)
|
| 357 |
|
|
return;
|
| 358 |
|
|
}
|
| 359 |
|
|
#endif
|
| 360 |
|
|
oip6 = mtod(m, struct ip6_hdr *);
|
| 361 |
|
|
|
| 362 |
|
|
/*
|
| 363 |
|
|
* If the destination address of the erroneous packet is a multicast
|
| 364 |
|
|
* address, or the packet was sent using link-layer multicast,
|
| 365 |
|
|
* we should basically suppress sending an error (RFC 2463, Section
|
| 366 |
|
|
* 2.4).
|
| 367 |
|
|
* We have two exceptions (the item e.2 in that section):
|
| 368 |
|
|
* - the Pakcet Too Big message can be sent for path MTU discovery.
|
| 369 |
|
|
* - the Parameter Problem Message that can be allowed an icmp6 error
|
| 370 |
|
|
* in the option type field. This check has been done in
|
| 371 |
|
|
* ip6_unknown_opt(), so we can just check the type and code.
|
| 372 |
|
|
*/
|
| 373 |
|
|
if ((m->m_flags & (M_BCAST|M_MCAST) ||
|
| 374 |
|
|
IN6_IS_ADDR_MULTICAST(&oip6->ip6_dst)) &&
|
| 375 |
|
|
(type != ICMP6_PACKET_TOO_BIG &&
|
| 376 |
|
|
(type != ICMP6_PARAM_PROB ||
|
| 377 |
|
|
code != ICMP6_PARAMPROB_OPTION)))
|
| 378 |
|
|
goto freeit;
|
| 379 |
|
|
|
| 380 |
|
|
/*
|
| 381 |
|
|
* RFC 2463, 2.4 (e.5): source address check.
|
| 382 |
|
|
* XXX: the case of anycast source?
|
| 383 |
|
|
*/
|
| 384 |
|
|
if (IN6_IS_ADDR_UNSPECIFIED(&oip6->ip6_src) ||
|
| 385 |
|
|
IN6_IS_ADDR_MULTICAST(&oip6->ip6_src))
|
| 386 |
|
|
goto freeit;
|
| 387 |
|
|
|
| 388 |
|
|
/*
|
| 389 |
|
|
* If we are about to send ICMPv6 against ICMPv6 error/redirect,
|
| 390 |
|
|
* don't do it.
|
| 391 |
|
|
*/
|
| 392 |
|
|
nxt = -1;
|
| 393 |
|
|
off = ip6_lasthdr(m, 0, IPPROTO_IPV6, &nxt);
|
| 394 |
|
|
if (off >= 0 && nxt == IPPROTO_ICMPV6) {
|
| 395 |
|
|
struct icmp6_hdr *icp;
|
| 396 |
|
|
|
| 397 |
|
|
#ifndef PULLDOWN_TEST
|
| 398 |
|
|
IP6_EXTHDR_CHECK(m, 0, off + sizeof(struct icmp6_hdr), );
|
| 399 |
|
|
icp = (struct icmp6_hdr *)(mtod(m, caddr_t) + off);
|
| 400 |
|
|
#else
|
| 401 |
|
|
IP6_EXTHDR_GET(icp, struct icmp6_hdr *, m, off,
|
| 402 |
|
|
sizeof(*icp));
|
| 403 |
|
|
if (icp == NULL) {
|
| 404 |
|
|
icmp6stat.icp6s_tooshort++;
|
| 405 |
|
|
return;
|
| 406 |
|
|
}
|
| 407 |
|
|
#endif
|
| 408 |
|
|
if (icp->icmp6_type < ICMP6_ECHO_REQUEST ||
|
| 409 |
|
|
icp->icmp6_type == ND_REDIRECT) {
|
| 410 |
|
|
/*
|
| 411 |
|
|
* ICMPv6 error
|
| 412 |
|
|
* Special case: for redirect (which is
|
| 413 |
|
|
* informational) we must not send icmp6 error.
|
| 414 |
|
|
*/
|
| 415 |
|
|
icmp6stat.icp6s_canterror++;
|
| 416 |
|
|
goto freeit;
|
| 417 |
|
|
} else {
|
| 418 |
|
|
/* ICMPv6 informational - send the error */
|
| 419 |
|
|
}
|
| 420 |
|
|
}
|
| 421 |
|
|
#if 0 /* controversial */
|
| 422 |
|
|
else if (off >= 0 && nxt == IPPROTO_ESP) {
|
| 423 |
|
|
/*
|
| 424 |
|
|
* It could be ICMPv6 error inside ESP. Take a safer side,
|
| 425 |
|
|
* don't respond.
|
| 426 |
|
|
*/
|
| 427 |
|
|
icmp6stat.icp6s_canterror++;
|
| 428 |
|
|
goto freeit;
|
| 429 |
|
|
}
|
| 430 |
|
|
#endif
|
| 431 |
|
|
else {
|
| 432 |
|
|
/* non-ICMPv6 - send the error */
|
| 433 |
|
|
}
|
| 434 |
|
|
|
| 435 |
|
|
oip6 = mtod(m, struct ip6_hdr *); /* adjust pointer */
|
| 436 |
|
|
|
| 437 |
|
|
/* Finally, do rate limitation check. */
|
| 438 |
|
|
if (icmp6_ratelimit(&oip6->ip6_src, type, code)) {
|
| 439 |
|
|
icmp6stat.icp6s_toofreq++;
|
| 440 |
|
|
goto freeit;
|
| 441 |
|
|
}
|
| 442 |
|
|
|
| 443 |
|
|
/*
|
| 444 |
|
|
* OK, ICMP6 can be generated.
|
| 445 |
|
|
*/
|
| 446 |
|
|
|
| 447 |
|
|
/*
|
| 448 |
|
|
* Recover the original ip6_src if the src and the homeaddr
|
| 449 |
|
|
* have been swapped while dest6 processing (see dest6.c). To
|
| 450 |
|
|
* avoid m_pulldown, we had better to swap addresses before
|
| 451 |
|
|
* m_prepend below.
|
| 452 |
|
|
*
|
| 453 |
|
|
* XXX: We should consider the other candidate to keep the
|
| 454 |
|
|
* icmp6 error packet correct that not swapping ip6_src and
|
| 455 |
|
|
* homeaddr in the dest6 processing.
|
| 456 |
|
|
*/
|
| 457 |
|
|
nip6_srcp = &oip6->ip6_src;
|
| 458 |
|
|
n = ip6_findaux(m);
|
| 459 |
|
|
if (n != NULL) {
|
| 460 |
|
|
ip6a = mtod(n, struct ip6aux *);
|
| 461 |
|
|
if ((ip6a->ip6a_flags & IP6A_HASEEN) != 0 &&
|
| 462 |
|
|
(ip6a->ip6a_flags & IP6A_SWAP) != 0) {
|
| 463 |
|
|
nip6_src = oip6->ip6_src;
|
| 464 |
|
|
nip6_srcp = &nip6_src;
|
| 465 |
|
|
if (icmp6_recover_src(m)) {
|
| 466 |
|
|
/* mbuf is freed in icmp6_recover_src */
|
| 467 |
|
|
return;
|
| 468 |
|
|
}
|
| 469 |
|
|
oip6 = mtod(m, struct ip6_hdr *); /* adjust pointer */
|
| 470 |
|
|
}
|
| 471 |
|
|
}
|
| 472 |
|
|
|
| 473 |
|
|
if (m->m_pkthdr.len >= ICMPV6_PLD_MAXLEN)
|
| 474 |
|
|
m_adj(m, ICMPV6_PLD_MAXLEN - m->m_pkthdr.len);
|
| 475 |
|
|
|
| 476 |
|
|
preplen = sizeof(struct ip6_hdr) + sizeof(struct icmp6_hdr);
|
| 477 |
|
|
M_PREPEND(m, preplen, M_DONTWAIT);
|
| 478 |
|
|
if (m && m->m_len < preplen)
|
| 479 |
|
|
m = m_pullup(m, preplen);
|
| 480 |
|
|
if (m == NULL) {
|
| 481 |
|
|
nd6log((LOG_DEBUG, "ENOBUFS in icmp6_error %d\n", __LINE__));
|
| 482 |
|
|
return;
|
| 483 |
|
|
}
|
| 484 |
|
|
|
| 485 |
|
|
nip6 = mtod(m, struct ip6_hdr *);
|
| 486 |
|
|
nip6->ip6_src = *nip6_srcp;
|
| 487 |
|
|
nip6->ip6_dst = oip6->ip6_dst;
|
| 488 |
|
|
|
| 489 |
|
|
if (IN6_IS_SCOPE_LINKLOCAL(&oip6->ip6_src))
|
| 490 |
|
|
oip6->ip6_src.s6_addr16[1] = 0;
|
| 491 |
|
|
if (IN6_IS_SCOPE_LINKLOCAL(&oip6->ip6_dst))
|
| 492 |
|
|
oip6->ip6_dst.s6_addr16[1] = 0;
|
| 493 |
|
|
|
| 494 |
|
|
icmp6 = (struct icmp6_hdr *)(nip6 + 1);
|
| 495 |
|
|
icmp6->icmp6_type = type;
|
| 496 |
|
|
icmp6->icmp6_code = code;
|
| 497 |
|
|
icmp6->icmp6_pptr = htonl((u_int32_t)param);
|
| 498 |
|
|
|
| 499 |
|
|
/*
|
| 500 |
|
|
* icmp6_reflect() is designed to be in the input path.
|
| 501 |
|
|
* icmp6_error() can be called from both input and outut path,
|
| 502 |
|
|
* and if we are in output path rcvif could contain bogus value.
|
| 503 |
|
|
* clear m->m_pkthdr.rcvif for safety, we should have enough scope
|
| 504 |
|
|
* information in ip header (nip6).
|
| 505 |
|
|
*/
|
| 506 |
|
|
m->m_pkthdr.rcvif = NULL;
|
| 507 |
|
|
|
| 508 |
|
|
icmp6stat.icp6s_outhist[type]++;
|
| 509 |
|
|
icmp6_reflect(m, sizeof(struct ip6_hdr)); /* header order: IPv6 - ICMPv6 */
|
| 510 |
|
|
|
| 511 |
|
|
return;
|
| 512 |
|
|
|
| 513 |
|
|
freeit:
|
| 514 |
|
|
/*
|
| 515 |
|
|
* If we can't tell wheter or not we can generate ICMP6, free it.
|
| 516 |
|
|
*/
|
| 517 |
|
|
m_freem(m);
|
| 518 |
|
|
}
|
| 519 |
|
|
|
| 520 |
|
|
/*
|
| 521 |
|
|
* Process a received ICMP6 message.
|
| 522 |
|
|
*/
|
| 523 |
|
|
int
|
| 524 |
|
|
icmp6_input(mp, offp, proto)
|
| 525 |
|
|
struct mbuf **mp;
|
| 526 |
|
|
int *offp, proto;
|
| 527 |
|
|
{
|
| 528 |
|
|
struct mbuf *m = *mp, *n;
|
| 529 |
|
|
struct ip6_hdr *ip6, *nip6;
|
| 530 |
|
|
struct icmp6_hdr *icmp6, *nicmp6;
|
| 531 |
|
|
int off = *offp;
|
| 532 |
|
|
int icmp6len = m->m_pkthdr.len - *offp;
|
| 533 |
|
|
int code, sum, noff;
|
| 534 |
|
|
|
| 535 |
|
|
icmp6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_msg);
|
| 536 |
|
|
|
| 537 |
|
|
#ifndef PULLDOWN_TEST
|
| 538 |
|
|
IP6_EXTHDR_CHECK(m, off, sizeof(struct icmp6_hdr), IPPROTO_DONE);
|
| 539 |
|
|
/* m might change if M_LOOP. So, call mtod after this */
|
| 540 |
|
|
#endif
|
| 541 |
|
|
|
| 542 |
|
|
/*
|
| 543 |
|
|
* Locate icmp6 structure in mbuf, and check
|
| 544 |
|
|
* that not corrupted and of at least minimum length
|
| 545 |
|
|
*/
|
| 546 |
|
|
|
| 547 |
|
|
ip6 = mtod(m, struct ip6_hdr *);
|
| 548 |
|
|
if (icmp6len < sizeof(struct icmp6_hdr)) {
|
| 549 |
|
|
icmp6stat.icp6s_tooshort++;
|
| 550 |
|
|
icmp6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_error);
|
| 551 |
|
|
goto freeit;
|
| 552 |
|
|
}
|
| 553 |
|
|
|
| 554 |
|
|
/*
|
| 555 |
|
|
* calculate the checksum
|
| 556 |
|
|
*/
|
| 557 |
|
|
#ifndef PULLDOWN_TEST
|
| 558 |
|
|
icmp6 = (struct icmp6_hdr *)((caddr_t)ip6 + off);
|
| 559 |
|
|
#else
|
| 560 |
|
|
IP6_EXTHDR_GET(icmp6, struct icmp6_hdr *, m, off, sizeof(*icmp6));
|
| 561 |
|
|
if (icmp6 == NULL) {
|
| 562 |
|
|
icmp6stat.icp6s_tooshort++;
|
| 563 |
|
|
icmp6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_error);
|
| 564 |
|
|
return IPPROTO_DONE;
|
| 565 |
|
|
}
|
| 566 |
|
|
#endif
|
| 567 |
|
|
code = icmp6->icmp6_code;
|
| 568 |
|
|
|
| 569 |
|
|
if ((sum = in6_cksum(m, IPPROTO_ICMPV6, off, icmp6len)) != 0) {
|
| 570 |
|
|
nd6log((LOG_ERR,
|
| 571 |
|
|
"ICMP6 checksum error(%d|%x) %s\n",
|
| 572 |
|
|
icmp6->icmp6_type, sum, ip6_sprintf(&ip6->ip6_src)));
|
| 573 |
|
|
icmp6stat.icp6s_checksum++;
|
| 574 |
|
|
icmp6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_error);
|
| 575 |
|
|
goto freeit;
|
| 576 |
|
|
}
|
| 577 |
|
|
|
| 578 |
|
|
#if defined(NFAITH) && 0 < NFAITH
|
| 579 |
|
|
if (faithprefix(&ip6->ip6_dst)) {
|
| 580 |
|
|
/*
|
| 581 |
|
|
* Deliver very specific ICMP6 type only.
|
| 582 |
|
|
* This is important to deilver TOOBIG. Otherwise PMTUD
|
| 583 |
|
|
* will not work.
|
| 584 |
|
|
*/
|
| 585 |
|
|
switch (icmp6->icmp6_type) {
|
| 586 |
|
|
case ICMP6_DST_UNREACH:
|
| 587 |
|
|
case ICMP6_PACKET_TOO_BIG:
|
| 588 |
|
|
case ICMP6_TIME_EXCEEDED:
|
| 589 |
|
|
break;
|
| 590 |
|
|
default:
|
| 591 |
|
|
goto freeit;
|
| 592 |
|
|
}
|
| 593 |
|
|
}
|
| 594 |
|
|
#endif
|
| 595 |
|
|
|
| 596 |
|
|
icmp6stat.icp6s_inhist[icmp6->icmp6_type]++;
|
| 597 |
|
|
|
| 598 |
|
|
#ifdef MIP6
|
| 599 |
|
|
if (mip6_icmp6_tunnel_input(m, off, icmp6len)) {
|
| 600 |
|
|
goto freeit;
|
| 601 |
|
|
}
|
| 602 |
|
|
#endif /* MIP6 */
|
| 603 |
|
|
switch (icmp6->icmp6_type) {
|
| 604 |
|
|
case ICMP6_DST_UNREACH:
|
| 605 |
|
|
icmp6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_dstunreach);
|
| 606 |
|
|
#ifdef MIP6
|
| 607 |
|
|
if (mip6_icmp6_input(m, off, icmp6len))
|
| 608 |
|
|
goto freeit;
|
| 609 |
|
|
#endif /* MIP6 */
|
| 610 |
|
|
switch (code) {
|
| 611 |
|
|
case ICMP6_DST_UNREACH_NOROUTE:
|
| 612 |
|
|
code = PRC_UNREACH_NET;
|
| 613 |
|
|
break;
|
| 614 |
|
|
case ICMP6_DST_UNREACH_ADMIN:
|
| 615 |
|
|
icmp6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_adminprohib);
|
| 616 |
|
|
code = PRC_UNREACH_PROTOCOL; /* is this a good code? */
|
| 617 |
|
|
break;
|
| 618 |
|
|
case ICMP6_DST_UNREACH_ADDR:
|
| 619 |
|
|
code = PRC_HOSTDEAD;
|
| 620 |
|
|
break;
|
| 621 |
|
|
#ifdef COMPAT_RFC1885
|
| 622 |
|
|
case ICMP6_DST_UNREACH_NOTNEIGHBOR:
|
| 623 |
|
|
code = PRC_UNREACH_SRCFAIL;
|
| 624 |
|
|
break;
|
| 625 |
|
|
#else
|
| 626 |
|
|
case ICMP6_DST_UNREACH_BEYONDSCOPE:
|
| 627 |
|
|
/* I mean "source address was incorrect." */
|
| 628 |
|
|
code = PRC_UNREACH_NET;
|
| 629 |
|
|
break;
|
| 630 |
|
|
#endif
|
| 631 |
|
|
case ICMP6_DST_UNREACH_NOPORT:
|
| 632 |
|
|
code = PRC_UNREACH_PORT;
|
| 633 |
|
|
break;
|
| 634 |
|
|
default:
|
| 635 |
|
|
goto badcode;
|
| 636 |
|
|
}
|
| 637 |
|
|
goto deliver;
|
| 638 |
|
|
break;
|
| 639 |
|
|
|
| 640 |
|
|
case ICMP6_PACKET_TOO_BIG:
|
| 641 |
|
|
icmp6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_pkttoobig);
|
| 642 |
|
|
if (code != 0)
|
| 643 |
|
|
goto badcode;
|
| 644 |
|
|
|
| 645 |
|
|
code = PRC_MSGSIZE;
|
| 646 |
|
|
|
| 647 |
|
|
/*
|
| 648 |
|
|
* Updating the path MTU will be done after examining
|
| 649 |
|
|
* intermediate extension headers.
|
| 650 |
|
|
*/
|
| 651 |
|
|
goto deliver;
|
| 652 |
|
|
break;
|
| 653 |
|
|
|
| 654 |
|
|
case ICMP6_TIME_EXCEEDED:
|
| 655 |
|
|
icmp6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_timeexceed);
|
| 656 |
|
|
switch (code) {
|
| 657 |
|
|
case ICMP6_TIME_EXCEED_TRANSIT:
|
| 658 |
|
|
code = PRC_TIMXCEED_INTRANS;
|
| 659 |
|
|
break;
|
| 660 |
|
|
case ICMP6_TIME_EXCEED_REASSEMBLY:
|
| 661 |
|
|
code = PRC_TIMXCEED_REASS;
|
| 662 |
|
|
break;
|
| 663 |
|
|
default:
|
| 664 |
|
|
goto badcode;
|
| 665 |
|
|
}
|
| 666 |
|
|
goto deliver;
|
| 667 |
|
|
break;
|
| 668 |
|
|
|
| 669 |
|
|
case ICMP6_PARAM_PROB:
|
| 670 |
|
|
icmp6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_paramprob);
|
| 671 |
|
|
switch (code) {
|
| 672 |
|
|
case ICMP6_PARAMPROB_NEXTHEADER:
|
| 673 |
|
|
code = PRC_UNREACH_PROTOCOL;
|
| 674 |
|
|
break;
|
| 675 |
|
|
case ICMP6_PARAMPROB_HEADER:
|
| 676 |
|
|
case ICMP6_PARAMPROB_OPTION:
|
| 677 |
|
|
#ifdef MIP6
|
| 678 |
|
|
if (mip6_icmp6_input(m, off, icmp6len))
|
| 679 |
|
|
goto freeit;
|
| 680 |
|
|
#endif /* MIP6 */
|
| 681 |
|
|
code = PRC_PARAMPROB;
|
| 682 |
|
|
break;
|
| 683 |
|
|
default:
|
| 684 |
|
|
goto badcode;
|
| 685 |
|
|
}
|
| 686 |
|
|
goto deliver;
|
| 687 |
|
|
break;
|
| 688 |
|
|
|
| 689 |
|
|
case ICMP6_ECHO_REQUEST:
|
| 690 |
|
|
icmp6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_echo);
|
| 691 |
|
|
if (code != 0)
|
| 692 |
|
|
goto badcode;
|
| 693 |
|
|
/*
|
| 694 |
|
|
* Copy mbuf to send to two data paths: userland socket(s),
|
| 695 |
|
|
* and to the querier (echo reply).
|
| 696 |
|
|
* m: a copy for socket, n: a copy for querier
|
| 697 |
|
|
*/
|
| 698 |
|
|
if ((n = m_copym(m, 0, M_COPYALL, M_DONTWAIT)) == NULL) {
|
| 699 |
|
|
/* Give up local */
|
| 700 |
|
|
n = m;
|
| 701 |
|
|
m = NULL;
|
| 702 |
|
|
goto deliverecho;
|
| 703 |
|
|
}
|
| 704 |
|
|
/*
|
| 705 |
|
|
* If the first mbuf is shared, or the first mbuf is too short,
|
| 706 |
|
|
* copy the first part of the data into a fresh mbuf.
|
| 707 |
|
|
* Otherwise, we will wrongly overwrite both copies.
|
| 708 |
|
|
*/
|
| 709 |
|
|
if ((n->m_flags & M_EXT) != 0 ||
|
| 710 |
|
|
n->m_len < off + sizeof(struct icmp6_hdr)) {
|
| 711 |
|
|
struct mbuf *n0 = n;
|
| 712 |
|
|
const int maxlen = sizeof(*nip6) + sizeof(*nicmp6);
|
| 713 |
|
|
|
| 714 |
|
|
/*
|
| 715 |
|
|
* Prepare an internal mbuf. m_pullup() doesn't
|
| 716 |
|
|
* always copy the length we specified.
|
| 717 |
|
|
*/
|
| 718 |
|
|
if (maxlen >= MCLBYTES) {
|
| 719 |
|
|
/* Give up remote */
|
| 720 |
|
|
m_freem(n0);
|
| 721 |
|
|
break;
|
| 722 |
|
|
}
|
| 723 |
|
|
MGETHDR(n, M_DONTWAIT, n0->m_type);
|
| 724 |
|
|
if (n && maxlen >= MHLEN) {
|
| 725 |
|
|
MCLGET(n, M_DONTWAIT);
|
| 726 |
|
|
if ((n->m_flags & M_EXT) == 0) {
|
| 727 |
|
|
m_free(n);
|
| 728 |
|
|
n = NULL;
|
| 729 |
|
|
}
|
| 730 |
|
|
}
|
| 731 |
|
|
if (n == NULL) {
|
| 732 |
|
|
/* Give up local */
|
| 733 |
|
|
m_freem(n0);
|
| 734 |
|
|
n = m;
|
| 735 |
|
|
m = NULL;
|
| 736 |
|
|
goto deliverecho;
|
| 737 |
|
|
}
|
| 738 |
|
|
#ifdef __OpenBSD__
|
| 739 |
|
|
M_MOVE_PKTHDR(n, n0);
|
| 740 |
|
|
#else
|
| 741 |
|
|
M_COPY_PKTHDR(n, n0);
|
| 742 |
|
|
#endif
|
| 743 |
|
|
/*
|
| 744 |
|
|
* Copy IPv6 and ICMPv6 only.
|
| 745 |
|
|
*/
|
| 746 |
|
|
nip6 = mtod(n, struct ip6_hdr *);
|
| 747 |
|
|
bcopy(ip6, nip6, sizeof(struct ip6_hdr));
|
| 748 |
|
|
nicmp6 = (struct icmp6_hdr *)(nip6 + 1);
|
| 749 |
|
|
bcopy(icmp6, nicmp6, sizeof(struct icmp6_hdr));
|
| 750 |
|
|
noff = sizeof(struct ip6_hdr);
|
| 751 |
|
|
n->m_len = noff + sizeof(struct icmp6_hdr);
|
| 752 |
|
|
/*
|
| 753 |
|
|
* Adjust mbuf. ip6_plen will be adjusted in
|
| 754 |
|
|
* ip6_output().
|
| 755 |
|
|
* n->m_pkthdr.len == n0->m_pkthdr.len at this point.
|
| 756 |
|
|
*/
|
| 757 |
|
|
n->m_pkthdr.len += noff + sizeof(struct icmp6_hdr);
|
| 758 |
|
|
n->m_pkthdr.len -= (off + sizeof(struct icmp6_hdr));
|
| 759 |
|
|
m_adj(n0, off + sizeof(struct icmp6_hdr));
|
| 760 |
|
|
n->m_next = n0;
|
| 761 |
|
|
n0->m_flags &= ~M_PKTHDR;
|
| 762 |
|
|
} else {
|
| 763 |
|
|
deliverecho:
|
| 764 |
|
|
nip6 = mtod(n, struct ip6_hdr *);
|
| 765 |
|
|
nicmp6 = (struct icmp6_hdr *)((caddr_t)nip6 + off);
|
| 766 |
|
|
noff = off;
|
| 767 |
|
|
}
|
| 768 |
|
|
nicmp6->icmp6_type = ICMP6_ECHO_REPLY;
|
| 769 |
|
|
nicmp6->icmp6_code = 0;
|
| 770 |
|
|
if (n) {
|
| 771 |
|
|
icmp6stat.icp6s_reflect++;
|
| 772 |
|
|
icmp6stat.icp6s_outhist[ICMP6_ECHO_REPLY]++;
|
| 773 |
|
|
icmp6_reflect(n, noff);
|
| 774 |
|
|
}
|
| 775 |
|
|
if (!m)
|
| 776 |
|
|
goto freeit;
|
| 777 |
|
|
break;
|
| 778 |
|
|
|
| 779 |
|
|
case ICMP6_ECHO_REPLY:
|
| 780 |
|
|
icmp6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_echoreply);
|
| 781 |
|
|
if (code != 0)
|
| 782 |
|
|
goto badcode;
|
| 783 |
|
|
break;
|
| 784 |
|
|
|
| 785 |
|
|
#ifdef MIP6
|
| 786 |
|
|
case ICMP6_HADISCOV_REQUEST:
|
| 787 |
|
|
if (icmp6len < sizeof(struct ha_discov_req))
|
| 788 |
|
|
goto badlen;
|
| 789 |
|
|
if (code != 0)
|
| 790 |
|
|
goto badcode;
|
| 791 |
|
|
if (mip6_icmp6_input(m, off, icmp6len))
|
| 792 |
|
|
goto freeit;
|
| 793 |
|
|
break;
|
| 794 |
|
|
case ICMP6_HADISCOV_REPLY:
|
| 795 |
|
|
if (icmp6len < sizeof(struct ha_discov_rep))
|
| 796 |
|
|
goto badlen;
|
| 797 |
|
|
if (code != 0)
|
| 798 |
|
|
goto badcode;
|
| 799 |
|
|
if (mip6_icmp6_input(m, off, icmp6len))
|
| 800 |
|
|
goto freeit;
|
| 801 |
|
|
break;
|
| 802 |
|
|
#ifndef MIP6_DRAFT13
|
| 803 |
|
|
case ICMP6_MOBILEPREFIX_SOLICIT:
|
| 804 |
|
|
if (icmp6len < sizeof(struct mobile_prefix_solicit))
|
| 805 |
|
|
goto badlen;
|
| 806 |
|
|
if (code != 0)
|
| 807 |
|
|
goto badcode;
|
| 808 |
|
|
if (mip6_icmp6_input(m, off, icmp6len))
|
| 809 |
|
|
goto freeit;
|
| 810 |
|
|
break;
|
| 811 |
|
|
|
| 812 |
|
|
case ICMP6_MOBILEPREFIX_ADVERT:
|
| 813 |
|
|
if (icmp6len < sizeof (struct mobile_prefix_advert))
|
| 814 |
|
|
goto badlen;
|
| 815 |
|
|
if (code != 0)
|
| 816 |
|
|
goto badcode;
|
| 817 |
|
|
if (mip6_icmp6_input(m, off, icmp6len))
|
| 818 |
|
|
goto freeit;
|
| 819 |
|
|
break;
|
| 820 |
|
|
#endif /* !MIP6_DRAFT13 */
|
| 821 |
|
|
#endif /* MIP6 */
|
| 822 |
|
|
|
| 823 |
|
|
case MLD_LISTENER_QUERY:
|
| 824 |
|
|
case MLD_LISTENER_REPORT:
|
| 825 |
|
|
if (icmp6len < sizeof(struct mld_hdr))
|
| 826 |
|
|
goto badlen;
|
| 827 |
|
|
if (icmp6->icmp6_type == MLD_LISTENER_QUERY) /* XXX: ugly... */
|
| 828 |
|
|
icmp6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_mldquery);
|
| 829 |
|
|
else
|
| 830 |
|
|
icmp6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_mldreport);
|
| 831 |
|
|
if ((n = m_copym(m, 0, M_COPYALL, M_DONTWAIT)) == NULL) {
|
| 832 |
|
|
/* give up local */
|
| 833 |
|
|
mld6_input(m, off);
|
| 834 |
|
|
m = NULL;
|
| 835 |
|
|
goto freeit;
|
| 836 |
|
|
}
|
| 837 |
|
|
mld6_input(n, off);
|
| 838 |
|
|
/* m stays. */
|
| 839 |
|
|
break;
|
| 840 |
|
|
|
| 841 |
|
|
case MLD_LISTENER_DONE:
|
| 842 |
|
|
icmp6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_mlddone);
|
| 843 |
|
|
if (icmp6len < sizeof(struct mld_hdr)) /* necessary? */
|
| 844 |
|
|
goto badlen;
|
| 845 |
|
|
break; /* nothing to be done in kernel */
|
| 846 |
|
|
|
| 847 |
|
|
case MLD_MTRACE_RESP:
|
| 848 |
|
|
case MLD_MTRACE:
|
| 849 |
|
|
/* XXX: these two are experimental. not officially defined. */
|
| 850 |
|
|
/* XXX: per-interface statistics? */
|
| 851 |
|
|
break; /* just pass it to applications */
|
| 852 |
|
|
|
| 853 |
|
|
case ICMP6_WRUREQUEST: /* ICMP6_FQDN_QUERY */
|
| 854 |
|
|
{
|
| 855 |
|
|
enum { WRU, FQDN } mode;
|
| 856 |
|
|
|
| 857 |
|
|
if (!icmp6_nodeinfo)
|
| 858 |
|
|
break;
|
| 859 |
|
|
|
| 860 |
|
|
if (icmp6len == sizeof(struct icmp6_hdr) + 4)
|
| 861 |
|
|
mode = WRU;
|
| 862 |
|
|
else if (icmp6len >= sizeof(struct icmp6_nodeinfo))
|
| 863 |
|
|
mode = FQDN;
|
| 864 |
|
|
else
|
| 865 |
|
|
goto badlen;
|
| 866 |
|
|
|
| 867 |
|
|
#ifdef __FreeBSD__
|
| 868 |
|
|
#define hostnamelen strlen(hostname)
|
| 869 |
|
|
#endif
|
| 870 |
|
|
if (mode == FQDN) {
|
| 871 |
|
|
#ifndef PULLDOWN_TEST
|
| 872 |
|
|
IP6_EXTHDR_CHECK(m, off, sizeof(struct icmp6_nodeinfo),
|
| 873 |
|
|
IPPROTO_DONE);
|
| 874 |
|
|
#endif
|
| 875 |
|
|
n = m_copym(m, 0, M_COPYALL, M_DONTWAIT);
|
| 876 |
|
|
if (n)
|
| 877 |
|
|
n = ni6_input(n, off);
|
| 878 |
|
|
/* XXX meaningless if n == NULL */
|
| 879 |
|
|
noff = sizeof(struct ip6_hdr);
|
| 880 |
|
|
} else {
|
| 881 |
|
|
u_char *p;
|
| 882 |
|
|
int maxlen, maxhlen;
|
| 883 |
|
|
|
| 884 |
|
|
if ((icmp6_nodeinfo & 5) != 5)
|
| 885 |
|
|
break;
|
| 886 |
|
|
|
| 887 |
|
|
if (code != 0)
|
| 888 |
|
|
goto badcode;
|
| 889 |
|
|
maxlen = sizeof(*nip6) + sizeof(*nicmp6) + 4;
|
| 890 |
|
|
if (maxlen >= MCLBYTES) {
|
| 891 |
|
|
/* Give up remote */
|
| 892 |
|
|
break;
|
| 893 |
|
|
}
|
| 894 |
|
|
MGETHDR(n, M_DONTWAIT, m->m_type);
|
| 895 |
|
|
if (n && maxlen > MHLEN) {
|
| 896 |
|
|
MCLGET(n, M_DONTWAIT);
|
| 897 |
|
|
if ((n->m_flags & M_EXT) == 0) {
|
| 898 |
|
|
m_free(n);
|
| 899 |
|
|
n = NULL;
|
| 900 |
|
|
}
|
| 901 |
|
|
}
|
| 902 |
|
|
if (n == NULL) {
|
| 903 |
|
|
/* Give up remote */
|
| 904 |
|
|
break;
|
| 905 |
|
|
}
|
| 906 |
|
|
n->m_pkthdr.rcvif = NULL;
|
| 907 |
|
|
n->m_len = 0;
|
| 908 |
|
|
maxhlen = M_TRAILINGSPACE(n) - maxlen;
|
| 909 |
|
|
if (maxhlen > hostnamelen)
|
| 910 |
|
|
maxhlen = hostnamelen;
|
| 911 |
|
|
/*
|
| 912 |
|
|
* Copy IPv6 and ICMPv6 only.
|
| 913 |
|
|
*/
|
| 914 |
|
|
nip6 = mtod(n, struct ip6_hdr *);
|
| 915 |
|
|
bcopy(ip6, nip6, sizeof(struct ip6_hdr));
|
| 916 |
|
|
nicmp6 = (struct icmp6_hdr *)(nip6 + 1);
|
| 917 |
|
|
bcopy(icmp6, nicmp6, sizeof(struct icmp6_hdr));
|
| 918 |
|
|
p = (u_char *)(nicmp6 + 1);
|
| 919 |
|
|
bzero(p, 4);
|
| 920 |
|
|
bcopy(hostname, p + 4, maxhlen); /* meaningless TTL */
|
| 921 |
|
|
noff = sizeof(struct ip6_hdr);
|
| 922 |
|
|
#ifdef __OpenBSD__
|
| 923 |
|
|
M_DUP_PKTHDR(n, m); /* just for rcvif */
|
| 924 |
|
|
#else
|
| 925 |
|
|
M_COPY_PKTHDR(n, m); /* just for rcvif */
|
| 926 |
|
|
#endif
|
| 927 |
|
|
n->m_pkthdr.len = n->m_len = sizeof(struct ip6_hdr) +
|
| 928 |
|
|
sizeof(struct icmp6_hdr) + 4 + maxhlen;
|
| 929 |
|
|
nicmp6->icmp6_type = ICMP6_WRUREPLY;
|
| 930 |
|
|
nicmp6->icmp6_code = 0;
|
| 931 |
|
|
}
|
| 932 |
|
|
#undef hostnamelen
|
| 933 |
|
|
if (n) {
|
| 934 |
|
|
icmp6stat.icp6s_reflect++;
|
| 935 |
|
|
icmp6stat.icp6s_outhist[ICMP6_WRUREPLY]++;
|
| 936 |
|
|
icmp6_reflect(n, noff);
|
| 937 |
|
|
}
|
| 938 |
|
|
break;
|
| 939 |
|
|
}
|
| 940 |
|
|
|
| 941 |
|
|
case ICMP6_WRUREPLY:
|
| 942 |
|
|
if (code != 0)
|
| 943 |
|
|
goto badcode;
|
| 944 |
|
|
break;
|
| 945 |
|
|
|
| 946 |
|
|
case ND_ROUTER_SOLICIT:
|
| 947 |
|
|
icmp6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_routersolicit);
|
| 948 |
|
|
if (code != 0)
|
| 949 |
|
|
goto badcode;
|
| 950 |
|
|
if (icmp6len < sizeof(struct nd_router_solicit))
|
| 951 |
|
|
goto badlen;
|
| 952 |
|
|
if ((n = m_copym(m, 0, M_COPYALL, M_DONTWAIT)) == NULL) {
|
| 953 |
|
|
/* give up local */
|
| 954 |
|
|
nd6_rs_input(m, off, icmp6len);
|
| 955 |
|
|
m = NULL;
|
| 956 |
|
|
goto freeit;
|
| 957 |
|
|
}
|
| 958 |
|
|
nd6_rs_input(n, off, icmp6len);
|
| 959 |
|
|
/* m stays. */
|
| 960 |
|
|
break;
|
| 961 |
|
|
|
| 962 |
|
|
case ND_ROUTER_ADVERT:
|
| 963 |
|
|
icmp6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_routeradvert);
|
| 964 |
|
|
if (code != 0)
|
| 965 |
|
|
goto badcode;
|
| 966 |
|
|
if (icmp6len < sizeof(struct nd_router_advert))
|
| 967 |
|
|
goto badlen;
|
| 968 |
|
|
if ((n = m_copym(m, 0, M_COPYALL, M_DONTWAIT)) == NULL) {
|
| 969 |
|
|
/* give up local */
|
| 970 |
|
|
nd6_ra_input(m, off, icmp6len);
|
| 971 |
|
|
m = NULL;
|
| 972 |
|
|
goto freeit;
|
| 973 |
|
|
}
|
| 974 |
|
|
nd6_ra_input(n, off, icmp6len);
|
| 975 |
|
|
/* m stays. */
|
| 976 |
|
|
break;
|
| 977 |
|
|
|
| 978 |
|
|
case ND_NEIGHBOR_SOLICIT:
|
| 979 |
|
|
icmp6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_neighborsolicit);
|
| 980 |
|
|
if (code != 0)
|
| 981 |
|
|
goto badcode;
|
| 982 |
|
|
if (icmp6len < sizeof(struct nd_neighbor_solicit))
|
| 983 |
|
|
goto badlen;
|
| 984 |
|
|
if ((n = m_copym(m, 0, M_COPYALL, M_DONTWAIT)) == NULL) {
|
| 985 |
|
|
/* give up local */
|
| 986 |
|
|
nd6_ns_input(m, off, icmp6len);
|
| 987 |
|
|
m = NULL;
|
| 988 |
|
|
goto freeit;
|
| 989 |
|
|
}
|
| 990 |
|
|
nd6_ns_input(n, off, icmp6len);
|
| 991 |
|
|
/* m stays. */
|
| 992 |
|
|
break;
|
| 993 |
|
|
|
| 994 |
|
|
case ND_NEIGHBOR_ADVERT:
|
| 995 |
|
|
icmp6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_neighboradvert);
|
| 996 |
|
|
if (code != 0)
|
| 997 |
|
|
goto badcode;
|
| 998 |
|
|
if (icmp6len < sizeof(struct nd_neighbor_advert))
|
| 999 |
|
|
goto badlen;
|
| 1000 |
|
|
if ((n = m_copym(m, 0, M_COPYALL, M_DONTWAIT)) == NULL) {
|
| 1001 |
|
|
/* give up local */
|
| 1002 |
|
|
nd6_na_input(m, off, icmp6len);
|
| 1003 |
|
|
m = NULL;
|
| 1004 |
|
|
goto freeit;
|
| 1005 |
|
|
}
|
| 1006 |
|
|
nd6_na_input(n, off, icmp6len);
|
| 1007 |
|
|
/* m stays. */
|
| 1008 |
|
|
break;
|
| 1009 |
|
|
|
| 1010 |
|
|
case ND_REDIRECT:
|
| 1011 |
|
|
icmp6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_redirect);
|
| 1012 |
|
|
if (code != 0)
|
| 1013 |
|
|
goto badcode;
|
| 1014 |
|
|
if (icmp6len < sizeof(struct nd_redirect))
|
| 1015 |
|
|
goto badlen;
|
| 1016 |
|
|
if ((n = m_copym(m, 0, M_COPYALL, M_DONTWAIT)) == NULL) {
|
| 1017 |
|
|
/* give up local */
|
| 1018 |
|
|
icmp6_redirect_input(m, off);
|
| 1019 |
|
|
m = NULL;
|
| 1020 |
|
|
goto freeit;
|
| 1021 |
|
|
}
|
| 1022 |
|
|
icmp6_redirect_input(n, off);
|
| 1023 |
|
|
/* m stays. */
|
| 1024 |
|
|
break;
|
| 1025 |
|
|
|
| 1026 |
|
|
case ICMP6_ROUTER_RENUMBERING:
|
| 1027 |
|
|
if (code != ICMP6_ROUTER_RENUMBERING_COMMAND &&
|
| 1028 |
|
|
code != ICMP6_ROUTER_RENUMBERING_RESULT)
|
| 1029 |
|
|
goto badcode;
|
| 1030 |
|
|
if (icmp6len < sizeof(struct icmp6_router_renum))
|
| 1031 |
|
|
goto badlen;
|
| 1032 |
|
|
break;
|
| 1033 |
|
|
|
| 1034 |
|
|
default:
|
| 1035 |
|
|
nd6log((LOG_DEBUG,
|
| 1036 |
|
|
"icmp6_input: unknown type %d(src=%s, dst=%s, ifid=%d)\n",
|
| 1037 |
|
|
icmp6->icmp6_type, ip6_sprintf(&ip6->ip6_src),
|
| 1038 |
|
|
ip6_sprintf(&ip6->ip6_dst),
|
| 1039 |
|
|
m->m_pkthdr.rcvif ? m->m_pkthdr.rcvif->if_index : 0));
|
| 1040 |
|
|
if (icmp6->icmp6_type < ICMP6_ECHO_REQUEST) {
|
| 1041 |
|
|
/* ICMPv6 error: MUST deliver it by spec... */
|
| 1042 |
|
|
code = PRC_NCMDS;
|
| 1043 |
|
|
/* deliver */
|
| 1044 |
|
|
} else {
|
| 1045 |
|
|
/* ICMPv6 informational: MUST not deliver */
|
| 1046 |
|
|
break;
|
| 1047 |
|
|
}
|
| 1048 |
|
|
deliver:
|
| 1049 |
|
|
if (icmp6_notify_error(m, off, icmp6len, code)) {
|
| 1050 |
|
|
/* In this case, m should've been freed. */
|
| 1051 |
|
|
return(IPPROTO_DONE);
|
| 1052 |
|
|
}
|
| 1053 |
|
|
break;
|
| 1054 |
|
|
|
| 1055 |
|
|
badcode:
|
| 1056 |
|
|
icmp6stat.icp6s_badcode++;
|
| 1057 |
|
|
break;
|
| 1058 |
|
|
|
| 1059 |
|
|
badlen:
|
| 1060 |
|
|
icmp6stat.icp6s_badlen++;
|
| 1061 |
|
|
break;
|
| 1062 |
|
|
}
|
| 1063 |
|
|
|
| 1064 |
|
|
/* deliver the packet to appropriate sockets */
|
| 1065 |
|
|
icmp6_rip6_input(&m, *offp);
|
| 1066 |
|
|
|
| 1067 |
|
|
return IPPROTO_DONE;
|
| 1068 |
|
|
|
| 1069 |
|
|
freeit:
|
| 1070 |
|
|
m_freem(m);
|
| 1071 |
|
|
return IPPROTO_DONE;
|
| 1072 |
|
|
}
|
| 1073 |
|
|
|
| 1074 |
|
|
static int
|
| 1075 |
|
|
icmp6_notify_error(m, off, icmp6len, code)
|
| 1076 |
|
|
struct mbuf *m;
|
| 1077 |
|
|
int off, icmp6len;
|
| 1078 |
|
|
{
|
| 1079 |
|
|
struct icmp6_hdr *icmp6;
|
| 1080 |
|
|
struct ip6_hdr *eip6;
|
| 1081 |
|
|
u_int32_t notifymtu;
|
| 1082 |
|
|
int64_t zoneid;
|
| 1083 |
|
|
struct sockaddr_in6 icmp6src, icmp6dst;
|
| 1084 |
|
|
|
| 1085 |
|
|
if (icmp6len < sizeof(struct icmp6_hdr) + sizeof(struct ip6_hdr)) {
|
| 1086 |
|
|
icmp6stat.icp6s_tooshort++;
|
| 1087 |
|
|
goto freeit;
|
| 1088 |
|
|
}
|
| 1089 |
|
|
#ifndef PULLDOWN_TEST
|
| 1090 |
|
|
IP6_EXTHDR_CHECK(m, off,
|
| 1091 |
|
|
sizeof(struct icmp6_hdr) + sizeof(struct ip6_hdr),
|
| 1092 |
|
|
-1);
|
| 1093 |
|
|
icmp6 = (struct icmp6_hdr *)(mtod(m, caddr_t) + off);
|
| 1094 |
|
|
#else
|
| 1095 |
|
|
IP6_EXTHDR_GET(icmp6, struct icmp6_hdr *, m, off,
|
| 1096 |
|
|
sizeof(*icmp6) + sizeof(struct ip6_hdr));
|
| 1097 |
|
|
if (icmp6 == NULL) {
|
| 1098 |
|
|
icmp6stat.icp6s_tooshort++;
|
| 1099 |
|
|
return(-1);
|
| 1100 |
|
|
}
|
| 1101 |
|
|
#endif
|
| 1102 |
|
|
eip6 = (struct ip6_hdr *)(icmp6 + 1);
|
| 1103 |
|
|
|
| 1104 |
|
|
/* Detect the upper level protocol */
|
| 1105 |
|
|
{
|
| 1106 |
|
|
void (*ctlfunc) __P((int, struct sockaddr *, void *));
|
| 1107 |
|
|
u_int8_t nxt = eip6->ip6_nxt;
|
| 1108 |
|
|
int eoff = off + sizeof(struct icmp6_hdr) +
|
| 1109 |
|
|
sizeof(struct ip6_hdr);
|
| 1110 |
|
|
struct ip6ctlparam ip6cp;
|
| 1111 |
|
|
struct in6_addr *finaldst = NULL;
|
| 1112 |
|
|
int icmp6type = icmp6->icmp6_type;
|
| 1113 |
|
|
struct ip6_frag *fh;
|
| 1114 |
|
|
struct ip6_rthdr *rth;
|
| 1115 |
|
|
struct ip6_rthdr0 *rth0;
|
| 1116 |
|
|
int rthlen;
|
| 1117 |
|
|
|
| 1118 |
|
|
while (1) { /* XXX: should avoid infinite loop explicitly? */
|
| 1119 |
|
|
struct ip6_ext *eh;
|
| 1120 |
|
|
|
| 1121 |
|
|
switch (nxt) {
|
| 1122 |
|
|
case IPPROTO_HOPOPTS:
|
| 1123 |
|
|
case IPPROTO_DSTOPTS:
|
| 1124 |
|
|
case IPPROTO_AH:
|
| 1125 |
|
|
#ifndef PULLDOWN_TEST
|
| 1126 |
|
|
IP6_EXTHDR_CHECK(m, 0, eoff +
|
| 1127 |
|
|
sizeof(struct ip6_ext),
|
| 1128 |
|
|
-1);
|
| 1129 |
|
|
eh = (struct ip6_ext *)(mtod(m, caddr_t)
|
| 1130 |
|
|
+ eoff);
|
| 1131 |
|
|
#else
|
| 1132 |
|
|
IP6_EXTHDR_GET(eh, struct ip6_ext *, m,
|
| 1133 |
|
|
eoff, sizeof(*eh));
|
| 1134 |
|
|
if (eh == NULL) {
|
| 1135 |
|
|
icmp6stat.icp6s_tooshort++;
|
| 1136 |
|
|
return(-1);
|
| 1137 |
|
|
}
|
| 1138 |
|
|
#endif
|
| 1139 |
|
|
|
| 1140 |
|
|
if (nxt == IPPROTO_AH)
|
| 1141 |
|
|
eoff += (eh->ip6e_len + 2) << 2;
|
| 1142 |
|
|
else
|
| 1143 |
|
|
eoff += (eh->ip6e_len + 1) << 3;
|
| 1144 |
|
|
nxt = eh->ip6e_nxt;
|
| 1145 |
|
|
break;
|
| 1146 |
|
|
case IPPROTO_ROUTING:
|
| 1147 |
|
|
/*
|
| 1148 |
|
|
* When the erroneous packet contains a
|
| 1149 |
|
|
* routing header, we should examine the
|
| 1150 |
|
|
* header to determine the final destination.
|
| 1151 |
|
|
* Otherwise, we can't properly update
|
| 1152 |
|
|
* information that depends on the final
|
| 1153 |
|
|
* destination (e.g. path MTU).
|
| 1154 |
|
|
*/
|
| 1155 |
|
|
#ifndef PULLDOWN_TEST
|
| 1156 |
|
|
IP6_EXTHDR_CHECK(m, 0, eoff + sizeof(*rth),
|
| 1157 |
|
|
-1);
|
| 1158 |
|
|
rth = (struct ip6_rthdr *)(mtod(m, caddr_t)
|
| 1159 |
|
|
+ eoff);
|
| 1160 |
|
|
#else
|
| 1161 |
|
|
IP6_EXTHDR_GET(rth, struct ip6_rthdr *, m,
|
| 1162 |
|
|
eoff, sizeof(*rth));
|
| 1163 |
|
|
if (rth == NULL) {
|
| 1164 |
|
|
icmp6stat.icp6s_tooshort++;
|
| 1165 |
|
|
return(-1);
|
| 1166 |
|
|
}
|
| 1167 |
|
|
#endif
|
| 1168 |
|
|
rthlen = (rth->ip6r_len + 1) << 3;
|
| 1169 |
|
|
/*
|
| 1170 |
|
|
* XXX: currently there is no
|
| 1171 |
|
|
* officially defined type other
|
| 1172 |
|
|
* than type-0.
|
| 1173 |
|
|
* Note that if the segment left field
|
| 1174 |
|
|
* is 0, all intermediate hops must
|
| 1175 |
|
|
* have been passed.
|
| 1176 |
|
|
*/
|
| 1177 |
|
|
if (rth->ip6r_segleft &&
|
| 1178 |
|
|
rth->ip6r_type == IPV6_RTHDR_TYPE_0) {
|
| 1179 |
|
|
int hops;
|
| 1180 |
|
|
|
| 1181 |
|
|
#ifndef PULLDOWN_TEST
|
| 1182 |
|
|
IP6_EXTHDR_CHECK(m, 0, eoff + rthlen,
|
| 1183 |
|
|
-1);
|
| 1184 |
|
|
rth0 = (struct ip6_rthdr0 *)(mtod(m, caddr_t) + eoff);
|
| 1185 |
|
|
#else
|
| 1186 |
|
|
IP6_EXTHDR_GET(rth0,
|
| 1187 |
|
|
struct ip6_rthdr0 *, m,
|
| 1188 |
|
|
eoff, rthlen);
|
| 1189 |
|
|
if (rth0 == NULL) {
|
| 1190 |
|
|
icmp6stat.icp6s_tooshort++;
|
| 1191 |
|
|
return(-1);
|
| 1192 |
|
|
}
|
| 1193 |
|
|
#endif
|
| 1194 |
|
|
/* just ignore a bogus header */
|
| 1195 |
|
|
if ((rth0->ip6r0_len % 2) == 0 &&
|
| 1196 |
|
|
(hops = rth0->ip6r0_len/2))
|
| 1197 |
|
|
finaldst = (struct in6_addr *)(rth0 + 1) + (hops - 1);
|
| 1198 |
|
|
}
|
| 1199 |
|
|
eoff += rthlen;
|
| 1200 |
|
|
nxt = rth->ip6r_nxt;
|
| 1201 |
|
|
break;
|
| 1202 |
|
|
case IPPROTO_FRAGMENT:
|
| 1203 |
|
|
#ifndef PULLDOWN_TEST
|
| 1204 |
|
|
IP6_EXTHDR_CHECK(m, 0, eoff +
|
| 1205 |
|
|
sizeof(struct ip6_frag),
|
| 1206 |
|
|
-1);
|
| 1207 |
|
|
fh = (struct ip6_frag *)(mtod(m, caddr_t)
|
| 1208 |
|
|
+ eoff);
|
| 1209 |
|
|
#else
|
| 1210 |
|
|
IP6_EXTHDR_GET(fh, struct ip6_frag *, m,
|
| 1211 |
|
|
eoff, sizeof(*fh));
|
| 1212 |
|
|
if (fh == NULL) {
|
| 1213 |
|
|
icmp6stat.icp6s_tooshort++;
|
| 1214 |
|
|
return(-1);
|
| 1215 |
|
|
}
|
| 1216 |
|
|
#endif
|
| 1217 |
|
|
/*
|
| 1218 |
|
|
* Data after a fragment header is meaningless
|
| 1219 |
|
|
* unless it is the first fragment, but
|
| 1220 |
|
|
* we'll go to the notify label for path MTU
|
| 1221 |
|
|
* discovery.
|
| 1222 |
|
|
*/
|
| 1223 |
|
|
if (fh->ip6f_offlg & IP6F_OFF_MASK)
|
| 1224 |
|
|
goto notify;
|
| 1225 |
|
|
|
| 1226 |
|
|
eoff += sizeof(struct ip6_frag);
|
| 1227 |
|
|
nxt = fh->ip6f_nxt;
|
| 1228 |
|
|
break;
|
| 1229 |
|
|
default:
|
| 1230 |
|
|
/*
|
| 1231 |
|
|
* This case includes ESP and the No Next
|
| 1232 |
|
|
* Header. In such cases going to the notify
|
| 1233 |
|
|
* label does not have any meaning
|
| 1234 |
|
|
* (i.e. ctlfunc will be NULL), but we go
|
| 1235 |
|
|
* anyway since we might have to update
|
| 1236 |
|
|
* path MTU information.
|
| 1237 |
|
|
*/
|
| 1238 |
|
|
goto notify;
|
| 1239 |
|
|
}
|
| 1240 |
|
|
}
|
| 1241 |
|
|
notify:
|
| 1242 |
|
|
#ifndef PULLDOWN_TEST
|
| 1243 |
|
|
icmp6 = (struct icmp6_hdr *)(mtod(m, caddr_t) + off);
|
| 1244 |
|
|
#else
|
| 1245 |
|
|
IP6_EXTHDR_GET(icmp6, struct icmp6_hdr *, m, off,
|
| 1246 |
|
|
sizeof(*icmp6) + sizeof(struct ip6_hdr));
|
| 1247 |
|
|
if (icmp6 == NULL) {
|
| 1248 |
|
|
icmp6stat.icp6s_tooshort++;
|
| 1249 |
|
|
return(-1);
|
| 1250 |
|
|
}
|
| 1251 |
|
|
#endif
|
| 1252 |
|
|
|
| 1253 |
|
|
eip6 = (struct ip6_hdr *)(icmp6 + 1);
|
| 1254 |
|
|
bzero(&icmp6dst, sizeof(icmp6dst));
|
| 1255 |
|
|
icmp6dst.sin6_len = sizeof(struct sockaddr_in6);
|
| 1256 |
|
|
icmp6dst.sin6_family = AF_INET6;
|
| 1257 |
|
|
if (finaldst == NULL)
|
| 1258 |
|
|
icmp6dst.sin6_addr = eip6->ip6_dst;
|
| 1259 |
|
|
else
|
| 1260 |
|
|
icmp6dst.sin6_addr = *finaldst;
|
| 1261 |
|
|
if ((zoneid = in6_addr2zoneid(m->m_pkthdr.rcvif,
|
| 1262 |
|
|
&icmp6dst.sin6_addr)) < 0)
|
| 1263 |
|
|
goto freeit;
|
| 1264 |
|
|
icmp6dst.sin6_scope_id = zoneid;
|
| 1265 |
|
|
if (in6_embedscope(&icmp6dst.sin6_addr, &icmp6dst)) {
|
| 1266 |
|
|
/* should be impossbile */
|
| 1267 |
|
|
nd6log((LOG_DEBUG,
|
| 1268 |
|
|
"icmp6_notify_error: in6_embedscope failed\n"));
|
| 1269 |
|
|
goto freeit;
|
| 1270 |
|
|
}
|
| 1271 |
|
|
|
| 1272 |
|
|
/*
|
| 1273 |
|
|
* retrieve parameters from the inner IPv6 header, and convert
|
| 1274 |
|
|
* them into sockaddr structures.
|
| 1275 |
|
|
*/
|
| 1276 |
|
|
bzero(&icmp6src, sizeof(icmp6src));
|
| 1277 |
|
|
icmp6src.sin6_len = sizeof(struct sockaddr_in6);
|
| 1278 |
|
|
icmp6src.sin6_family = AF_INET6;
|
| 1279 |
|
|
icmp6src.sin6_addr = eip6->ip6_src;
|
| 1280 |
|
|
if ((zoneid = in6_addr2zoneid(m->m_pkthdr.rcvif,
|
| 1281 |
|
|
&icmp6src.sin6_addr)) < 0)
|
| 1282 |
|
|
goto freeit;
|
| 1283 |
|
|
icmp6src.sin6_scope_id = zoneid;
|
| 1284 |
|
|
if (in6_embedscope(&icmp6src.sin6_addr, &icmp6src)) {
|
| 1285 |
|
|
/* should be impossbile */
|
| 1286 |
|
|
nd6log((LOG_DEBUG,
|
| 1287 |
|
|
"icmp6_notify_error: in6_embedscope failed\n"));
|
| 1288 |
|
|
goto freeit;
|
| 1289 |
|
|
}
|
| 1290 |
|
|
icmp6src.sin6_flowinfo =
|
| 1291 |
|
|
(eip6->ip6_flow & IPV6_FLOWLABEL_MASK);
|
| 1292 |
|
|
|
| 1293 |
|
|
if (finaldst == NULL)
|
| 1294 |
|
|
finaldst = &eip6->ip6_dst;
|
| 1295 |
|
|
ip6cp.ip6c_m = m;
|
| 1296 |
|
|
ip6cp.ip6c_icmp6 = icmp6;
|
| 1297 |
|
|
ip6cp.ip6c_ip6 = (struct ip6_hdr *)(icmp6 + 1);
|
| 1298 |
|
|
ip6cp.ip6c_off = eoff;
|
| 1299 |
|
|
ip6cp.ip6c_finaldst = finaldst;
|
| 1300 |
|
|
ip6cp.ip6c_src = &icmp6src;
|
| 1301 |
|
|
ip6cp.ip6c_nxt = nxt;
|
| 1302 |
|
|
|
| 1303 |
|
|
if (icmp6type == ICMP6_PACKET_TOO_BIG) {
|
| 1304 |
|
|
notifymtu = ntohl(icmp6->icmp6_mtu);
|
| 1305 |
|
|
ip6cp.ip6c_cmdarg = (void *)¬ifymtu;
|
| 1306 |
|
|
#if !(defined(__NetBSD__) || defined(__OpenBSD__))
|
| 1307 |
|
|
icmp6_mtudisc_update(&ip6cp, 1); /* XXX */
|
| 1308 |
|
|
#endif
|
| 1309 |
|
|
}
|
| 1310 |
|
|
|
| 1311 |
|
|
ctlfunc = (void (*) __P((int, struct sockaddr *, void *)))
|
| 1312 |
|
|
(inet6sw[ip6_protox[nxt]].pr_ctlinput);
|
| 1313 |
|
|
if (ctlfunc) {
|
| 1314 |
|
|
(void) (*ctlfunc)(code, (struct sockaddr *)&icmp6dst,
|
| 1315 |
|
|
&ip6cp);
|
| 1316 |
|
|
}
|
| 1317 |
|
|
}
|
| 1318 |
|
|
return(0);
|
| 1319 |
|
|
|
| 1320 |
|
|
freeit:
|
| 1321 |
|
|
m_freem(m);
|
| 1322 |
|
|
return(-1);
|
| 1323 |
|
|
}
|
| 1324 |
|
|
|
| 1325 |
|
|
void
|
| 1326 |
|
|
icmp6_mtudisc_update(ip6cp, validated)
|
| 1327 |
|
|
struct ip6ctlparam *ip6cp;
|
| 1328 |
|
|
int validated;
|
| 1329 |
|
|
{
|
| 1330 |
|
|
#if defined(__NetBSD__) || defined(__OpenBSD__)
|
| 1331 |
|
|
unsigned long rtcount;
|
| 1332 |
|
|
struct icmp6_mtudisc_callback *mc;
|
| 1333 |
|
|
#endif
|
| 1334 |
|
|
struct in6_addr *dst = ip6cp->ip6c_finaldst;
|
| 1335 |
|
|
struct icmp6_hdr *icmp6 = ip6cp->ip6c_icmp6;
|
| 1336 |
|
|
struct mbuf *m = ip6cp->ip6c_m; /* will be necessary for scope issue */
|
| 1337 |
|
|
u_int mtu = ntohl(icmp6->icmp6_mtu);
|
| 1338 |
|
|
struct rtentry *rt = NULL;
|
| 1339 |
|
|
struct sockaddr_in6 sin6;
|
| 1340 |
|
|
#ifdef __bsdi__
|
| 1341 |
|
|
#ifdef NEW_STRUCT_ROUTE
|
| 1342 |
|
|
struct route ro6;
|
| 1343 |
|
|
#else
|
| 1344 |
|
|
struct route_in6 ro6;
|
| 1345 |
|
|
#endif
|
| 1346 |
|
|
#endif
|
| 1347 |
|
|
|
| 1348 |
|
|
#if defined(__NetBSD__) || defined(__OpenBSD__)
|
| 1349 |
|
|
/*
|
| 1350 |
|
|
* allow non-validated cases if memory is plenty, to make traffic
|
| 1351 |
|
|
* from non-connected pcb happy.
|
| 1352 |
|
|
*/
|
| 1353 |
|
|
rtcount = rt_timer_count(icmp6_mtudisc_timeout_q);
|
| 1354 |
|
|
if (validated) {
|
| 1355 |
|
|
if (0 <= icmp6_mtudisc_hiwat && rtcount > icmp6_mtudisc_hiwat)
|
| 1356 |
|
|
return;
|
| 1357 |
|
|
else if (0 <= icmp6_mtudisc_lowat &&
|
| 1358 |
|
|
rtcount > icmp6_mtudisc_lowat) {
|
| 1359 |
|
|
/*
|
| 1360 |
|
|
* XXX nuke a victim, install the new one.
|
| 1361 |
|
|
*/
|
| 1362 |
|
|
}
|
| 1363 |
|
|
} else {
|
| 1364 |
|
|
if (0 <= icmp6_mtudisc_lowat && rtcount > icmp6_mtudisc_lowat)
|
| 1365 |
|
|
return;
|
| 1366 |
|
|
}
|
| 1367 |
|
|
#else
|
| 1368 |
|
|
if (!validated)
|
| 1369 |
|
|
return;
|
| 1370 |
|
|
#endif
|
| 1371 |
|
|
|
| 1372 |
|
|
bzero(&sin6, sizeof(sin6));
|
| 1373 |
|
|
sin6.sin6_family = PF_INET6;
|
| 1374 |
|
|
sin6.sin6_len = sizeof(struct sockaddr_in6);
|
| 1375 |
|
|
sin6.sin6_addr = *dst;
|
| 1376 |
|
|
/* XXX normally, this won't happen */
|
| 1377 |
|
|
if (IN6_IS_ADDR_LINKLOCAL(dst)) {
|
| 1378 |
|
|
sin6.sin6_addr.s6_addr16[1] =
|
| 1379 |
|
|
htons(m->m_pkthdr.rcvif->if_index);
|
| 1380 |
|
|
}
|
| 1381 |
|
|
/* sin6.sin6_scope_id = XXX: should be set if DST is a scoped addr */
|
| 1382 |
|
|
#if defined(__NetBSD__) || defined(__OpenBSD__)
|
| 1383 |
|
|
rt = icmp6_mtudisc_clone((struct sockaddr *)&sin6);
|
| 1384 |
|
|
#else
|
| 1385 |
|
|
#ifdef __FreeBSD__
|
| 1386 |
|
|
rt = rtalloc1((struct sockaddr *)&sin6, 0,
|
| 1387 |
|
|
RTF_CLONING | RTF_PRCLONING);
|
| 1388 |
|
|
#else
|
| 1389 |
|
|
#ifdef __bsdi__
|
| 1390 |
|
|
bcopy(&sin6, &ro6.ro_dst, sizeof(struct sockaddr_in6));
|
| 1391 |
|
|
ro6.ro_rt = 0;
|
| 1392 |
|
|
/* rtcalloc((struct route *)&ro6); */
|
| 1393 |
|
|
rtalloc((struct route *)&ro6);
|
| 1394 |
|
|
rt = ro6.ro_rt;
|
| 1395 |
|
|
#else
|
| 1396 |
|
|
#error no case for this particular operating system
|
| 1397 |
|
|
#endif
|
| 1398 |
|
|
#endif
|
| 1399 |
|
|
#endif
|
| 1400 |
|
|
|
| 1401 |
|
|
if (rt && (rt->rt_flags & RTF_HOST)
|
| 1402 |
|
|
&& !(rt->rt_rmx.rmx_locks & RTV_MTU)) {
|
| 1403 |
|
|
if (mtu < IPV6_MMTU) {
|
| 1404 |
|
|
/* xxx */
|
| 1405 |
|
|
rt->rt_rmx.rmx_locks |= RTV_MTU;
|
| 1406 |
|
|
} else if (mtu < rt->rt_ifp->if_mtu &&
|
| 1407 |
|
|
rt->rt_rmx.rmx_mtu > mtu) {
|
| 1408 |
|
|
icmp6stat.icp6s_pmtuchg++;
|
| 1409 |
|
|
rt->rt_rmx.rmx_mtu = mtu;
|
| 1410 |
|
|
}
|
| 1411 |
|
|
}
|
| 1412 |
|
|
if (rt) { /* XXX: need braces to avoid conflict with else in RTFREE. */
|
| 1413 |
|
|
RTFREE(rt);
|
| 1414 |
|
|
}
|
| 1415 |
|
|
|
| 1416 |
|
|
#if defined(__NetBSD__) || defined(__OpenBSD__)
|
| 1417 |
|
|
/*
|
| 1418 |
|
|
* Notify protocols that the MTU for this destination
|
| 1419 |
|
|
* has changed.
|
| 1420 |
|
|
*/
|
| 1421 |
|
|
for (mc = LIST_FIRST(&icmp6_mtudisc_callbacks); mc != NULL;
|
| 1422 |
|
|
mc = LIST_NEXT(mc, mc_list))
|
| 1423 |
|
|
(*mc->mc_func)(&sin6.sin6_addr);
|
| 1424 |
|
|
#endif
|
| 1425 |
|
|
}
|
| 1426 |
|
|
|
| 1427 |
|
|
/*
|
| 1428 |
|
|
* Process a Node Information Query packet, based on
|
| 1429 |
|
|
* draft-ietf-ipngwg-icmp-name-lookups-07.
|
| 1430 |
|
|
*
|
| 1431 |
|
|
* Spec incompatibilities:
|
| 1432 |
|
|
* - IPv6 Subject address handling
|
| 1433 |
|
|
* - IPv4 Subject address handling support missing
|
| 1434 |
|
|
* - Proxy reply (answer even if it's not for me)
|
| 1435 |
|
|
* - joins NI group address at in6_ifattach() time only, does not cope
|
| 1436 |
|
|
* with hostname changes by sethostname(3)
|
| 1437 |
|
|
*/
|
| 1438 |
|
|
#ifdef __FreeBSD__
|
| 1439 |
|
|
#define hostnamelen strlen(hostname)
|
| 1440 |
|
|
#endif
|
| 1441 |
|
|
#ifndef offsetof /* XXX */
|
| 1442 |
|
|
#define offsetof(type, member) ((size_t)(&((type *)0)->member))
|
| 1443 |
|
|
#endif
|
| 1444 |
|
|
static struct mbuf *
|
| 1445 |
|
|
ni6_input(m, off)
|
| 1446 |
|
|
struct mbuf *m;
|
| 1447 |
|
|
int off;
|
| 1448 |
|
|
{
|
| 1449 |
|
|
struct icmp6_nodeinfo *ni6, *nni6;
|
| 1450 |
|
|
struct mbuf *n = NULL;
|
| 1451 |
|
|
u_int16_t qtype;
|
| 1452 |
|
|
int subjlen;
|
| 1453 |
|
|
int replylen = sizeof(struct ip6_hdr) + sizeof(struct icmp6_nodeinfo);
|
| 1454 |
|
|
struct ni_reply_fqdn *fqdn;
|
| 1455 |
|
|
int addrs; /* for NI_QTYPE_NODEADDR */
|
| 1456 |
|
|
struct ifnet *ifp = NULL; /* for NI_QTYPE_NODEADDR */
|
| 1457 |
|
|
struct sockaddr_in6 sin6; /* double meaning; ip6_dst and subjectaddr */
|
| 1458 |
|
|
struct sockaddr_in6 sin6_d; /* XXX: we should retrieve this from m_aux */
|
| 1459 |
|
|
struct ip6_hdr *ip6;
|
| 1460 |
|
|
int oldfqdn = 0; /* if 1, return pascal string (03 draft) */
|
| 1461 |
|
|
char *subj = NULL;
|
| 1462 |
|
|
struct in6_ifaddr *ia6 = NULL;
|
| 1463 |
|
|
int64_t zoneid;
|
| 1464 |
|
|
|
| 1465 |
|
|
ip6 = mtod(m, struct ip6_hdr *);
|
| 1466 |
|
|
#ifndef PULLDOWN_TEST
|
| 1467 |
|
|
ni6 = (struct icmp6_nodeinfo *)(mtod(m, caddr_t) + off);
|
| 1468 |
|
|
#else
|
| 1469 |
|
|
IP6_EXTHDR_GET(ni6, struct icmp6_nodeinfo *, m, off, sizeof(*ni6));
|
| 1470 |
|
|
if (ni6 == NULL) {
|
| 1471 |
|
|
/* m is already reclaimed */
|
| 1472 |
|
|
return NULL;
|
| 1473 |
|
|
}
|
| 1474 |
|
|
#endif
|
| 1475 |
|
|
|
| 1476 |
|
|
/*
|
| 1477 |
|
|
* Validate IPv6 destination address.
|
| 1478 |
|
|
*
|
| 1479 |
|
|
* The Responder must discard the Query without further processing
|
| 1480 |
|
|
* unless it is one of the Responder's unicast or anycast addresses, or
|
| 1481 |
|
|
* a link-local scope multicast address which the Responder has joined.
|
| 1482 |
|
|
* [icmp-name-lookups-07, Section 4.]
|
| 1483 |
|
|
*/
|
| 1484 |
|
|
bzero(&sin6, sizeof(sin6));
|
| 1485 |
|
|
sin6.sin6_family = AF_INET6;
|
| 1486 |
|
|
sin6.sin6_len = sizeof(struct sockaddr_in6);
|
| 1487 |
|
|
bcopy(&ip6->ip6_dst, &sin6.sin6_addr, sizeof(sin6.sin6_addr));
|
| 1488 |
|
|
/* XXX scopeid */
|
| 1489 |
|
|
if ((ia6 = (struct in6_ifaddr *)ifa_ifwithaddr((struct sockaddr *)&sin6)) != NULL) {
|
| 1490 |
|
|
/* unicast/anycast, fine */
|
| 1491 |
|
|
if ((ia6->ia6_flags & IN6_IFF_TEMPORARY) != 0 &&
|
| 1492 |
|
|
(icmp6_nodeinfo & 4) == 0) {
|
| 1493 |
|
|
nd6log((LOG_DEBUG, "ni6_input: ignore node info to "
|
| 1494 |
|
|
"a temporary address in %s:%d",
|
| 1495 |
|
|
__FILE__, __LINE__));
|
| 1496 |
|
|
goto bad;
|
| 1497 |
|
|
}
|
| 1498 |
|
|
} else if (IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr))
|
| 1499 |
|
|
; /* link-local multicast, fine */
|
| 1500 |
|
|
else
|
| 1501 |
|
|
goto bad;
|
| 1502 |
|
|
|
| 1503 |
|
|
/* validate query Subject field. */
|
| 1504 |
|
|
qtype = ntohs(ni6->ni_qtype);
|
| 1505 |
|
|
subjlen = m->m_pkthdr.len - off - sizeof(struct icmp6_nodeinfo);
|
| 1506 |
|
|
switch (qtype) {
|
| 1507 |
|
|
case NI_QTYPE_NOOP:
|
| 1508 |
|
|
case NI_QTYPE_SUPTYPES:
|
| 1509 |
|
|
/* 07 draft */
|
| 1510 |
|
|
if (ni6->ni_code == ICMP6_NI_SUBJ_FQDN && subjlen == 0)
|
| 1511 |
|
|
break;
|
| 1512 |
|
|
/* FALLTHROUGH */
|
| 1513 |
|
|
case NI_QTYPE_FQDN:
|
| 1514 |
|
|
case NI_QTYPE_NODEADDR:
|
| 1515 |
|
|
case NI_QTYPE_IPV4ADDR:
|
| 1516 |
|
|
switch (ni6->ni_code) {
|
| 1517 |
|
|
case ICMP6_NI_SUBJ_IPV6:
|
| 1518 |
|
|
#if ICMP6_NI_SUBJ_IPV6 != 0
|
| 1519 |
|
|
case 0:
|
| 1520 |
|
|
#endif
|
| 1521 |
|
|
/*
|
| 1522 |
|
|
* backward compatibility - try to accept 03 draft
|
| 1523 |
|
|
* format, where no Subject is present.
|
| 1524 |
|
|
*/
|
| 1525 |
|
|
if (qtype == NI_QTYPE_FQDN && ni6->ni_code == 0 &&
|
| 1526 |
|
|
subjlen == 0) {
|
| 1527 |
|
|
oldfqdn++;
|
| 1528 |
|
|
break;
|
| 1529 |
|
|
}
|
| 1530 |
|
|
#if ICMP6_NI_SUBJ_IPV6 != 0
|
| 1531 |
|
|
if (ni6->ni_code != ICMP6_NI_SUBJ_IPV6)
|
| 1532 |
|
|
goto bad;
|
| 1533 |
|
|
#endif
|
| 1534 |
|
|
|
| 1535 |
|
|
if (subjlen != sizeof(sin6.sin6_addr))
|
| 1536 |
|
|
goto bad;
|
| 1537 |
|
|
|
| 1538 |
|
|
/*
|
| 1539 |
|
|
* Validate Subject address.
|
| 1540 |
|
|
*
|
| 1541 |
|
|
* Not sure what exactly "address belongs to the node"
|
| 1542 |
|
|
* means in the spec, is it just unicast, or what?
|
| 1543 |
|
|
*
|
| 1544 |
|
|
* At this moment we consider Subject address as
|
| 1545 |
|
|
* "belong to the node" if the Subject address equals
|
| 1546 |
|
|
* to the IPv6 destination address; validation for
|
| 1547 |
|
|
* IPv6 destination address should have done enough
|
| 1548 |
|
|
* check for us.
|
| 1549 |
|
|
*
|
| 1550 |
|
|
* We do not do proxy at this moment.
|
| 1551 |
|
|
*/
|
| 1552 |
|
|
/* m_pulldown instead of copy? */
|
| 1553 |
|
|
m_copydata(m, off + sizeof(struct icmp6_nodeinfo),
|
| 1554 |
|
|
subjlen, (caddr_t)&sin6.sin6_addr);
|
| 1555 |
|
|
if ((zoneid = in6_addr2zoneid(m->m_pkthdr.rcvif,
|
| 1556 |
|
|
&sin6.sin6_addr)) < 0)
|
| 1557 |
|
|
goto bad;
|
| 1558 |
|
|
sin6.sin6_scope_id = zoneid;
|
| 1559 |
|
|
|
| 1560 |
|
|
if (in6_embedscope(&sin6.sin6_addr, &sin6))
|
| 1561 |
|
|
goto bad; /* XXX should not happen */
|
| 1562 |
|
|
bzero(&sin6_d, sizeof(sin6_d));
|
| 1563 |
|
|
sin6_d.sin6_family = AF_INET6; /* not used, actually */
|
| 1564 |
|
|
sin6_d.sin6_len = sizeof(sin6_d); /* ditto */
|
| 1565 |
|
|
sin6_d.sin6_addr = ip6->ip6_dst;
|
| 1566 |
|
|
if ((zoneid = in6_addr2zoneid(m->m_pkthdr.rcvif,
|
| 1567 |
|
|
&ip6->ip6_dst)) < 0)
|
| 1568 |
|
|
goto bad;
|
| 1569 |
|
|
sin6_d.sin6_scope_id = zoneid;
|
| 1570 |
|
|
if (in6_embedscope(&sin6_d.sin6_addr, &sin6_d))
|
| 1571 |
|
|
goto bad; /* XXX should not happen */
|
| 1572 |
|
|
subj = (char *)&sin6;
|
| 1573 |
|
|
if (SA6_ARE_ADDR_EQUAL(&sin6, &sin6_d))
|
| 1574 |
|
|
break;
|
| 1575 |
|
|
|
| 1576 |
|
|
/*
|
| 1577 |
|
|
* XXX if we are to allow other cases, we should really
|
| 1578 |
|
|
* be careful about scope here.
|
| 1579 |
|
|
* basically, we should disallow queries toward IPv6
|
| 1580 |
|
|
* destination X with subject Y, if scope(X) > scope(Y).
|
| 1581 |
|
|
* if we allow scope(X) > scope(Y), it will result in
|
| 1582 |
|
|
* information leakage across scope boundary.
|
| 1583 |
|
|
*/
|
| 1584 |
|
|
goto bad;
|
| 1585 |
|
|
|
| 1586 |
|
|
case ICMP6_NI_SUBJ_FQDN:
|
| 1587 |
|
|
/*
|
| 1588 |
|
|
* Validate Subject name with gethostname(3).
|
| 1589 |
|
|
*
|
| 1590 |
|
|
* The behavior may need some debate, since:
|
| 1591 |
|
|
* - we are not sure if the node has FQDN as
|
| 1592 |
|
|
* hostname (returned by gethostname(3)).
|
| 1593 |
|
|
* - the code does wildcard match for truncated names.
|
| 1594 |
|
|
* however, we are not sure if we want to perform
|
| 1595 |
|
|
* wildcard match, if gethostname(3) side has
|
| 1596 |
|
|
* truncated hostname.
|
| 1597 |
|
|
*/
|
| 1598 |
|
|
n = ni6_nametodns(hostname, hostnamelen, 0);
|
| 1599 |
|
|
if (!n || n->m_next || n->m_len == 0)
|
| 1600 |
|
|
goto bad;
|
| 1601 |
|
|
IP6_EXTHDR_GET(subj, char *, m,
|
| 1602 |
|
|
off + sizeof(struct icmp6_nodeinfo), subjlen);
|
| 1603 |
|
|
if (subj == NULL)
|
| 1604 |
|
|
goto bad;
|
| 1605 |
|
|
if (!ni6_dnsmatch(subj, subjlen, mtod(n, const char *),
|
| 1606 |
|
|
n->m_len)) {
|
| 1607 |
|
|
goto bad;
|
| 1608 |
|
|
}
|
| 1609 |
|
|
m_freem(n);
|
| 1610 |
|
|
n = NULL;
|
| 1611 |
|
|
break;
|
| 1612 |
|
|
|
| 1613 |
|
|
case ICMP6_NI_SUBJ_IPV4: /* XXX: to be implemented? */
|
| 1614 |
|
|
default:
|
| 1615 |
|
|
goto bad;
|
| 1616 |
|
|
}
|
| 1617 |
|
|
break;
|
| 1618 |
|
|
}
|
| 1619 |
|
|
|
| 1620 |
|
|
/* refuse based on configuration. XXX ICMP6_NI_REFUSED? */
|
| 1621 |
|
|
switch (qtype) {
|
| 1622 |
|
|
case NI_QTYPE_FQDN:
|
| 1623 |
|
|
if ((icmp6_nodeinfo & 1) == 0)
|
| 1624 |
|
|
goto bad;
|
| 1625 |
|
|
break;
|
| 1626 |
|
|
case NI_QTYPE_NODEADDR:
|
| 1627 |
|
|
case NI_QTYPE_IPV4ADDR:
|
| 1628 |
|
|
if ((icmp6_nodeinfo & 2) == 0)
|
| 1629 |
|
|
goto bad;
|
| 1630 |
|
|
break;
|
| 1631 |
|
|
}
|
| 1632 |
|
|
|
| 1633 |
|
|
/* guess reply length */
|
| 1634 |
|
|
switch (qtype) {
|
| 1635 |
|
|
case NI_QTYPE_NOOP:
|
| 1636 |
|
|
break; /* no reply data */
|
| 1637 |
|
|
case NI_QTYPE_SUPTYPES:
|
| 1638 |
|
|
replylen += sizeof(u_int32_t);
|
| 1639 |
|
|
break;
|
| 1640 |
|
|
case NI_QTYPE_FQDN:
|
| 1641 |
|
|
/* XXX will append an mbuf */
|
| 1642 |
|
|
replylen += offsetof(struct ni_reply_fqdn, ni_fqdn_namelen);
|
| 1643 |
|
|
break;
|
| 1644 |
|
|
case NI_QTYPE_NODEADDR:
|
| 1645 |
|
|
addrs = ni6_addrs(ni6, m, &ifp, subj);
|
| 1646 |
|
|
if ((replylen += addrs * (sizeof(struct in6_addr) +
|
| 1647 |
|
|
sizeof(u_int32_t))) > MCLBYTES)
|
| 1648 |
|
|
replylen = MCLBYTES; /* XXX: will truncate pkt later */
|
| 1649 |
|
|
break;
|
| 1650 |
|
|
case NI_QTYPE_IPV4ADDR:
|
| 1651 |
|
|
/* unsupported - should respond with unknown Qtype? */
|
| 1652 |
|
|
goto bad;
|
| 1653 |
|
|
default:
|
| 1654 |
|
|
/*
|
| 1655 |
|
|
* XXX: We must return a reply with the ICMP6 code
|
| 1656 |
|
|
* `unknown Qtype' in this case. However we regard the case
|
| 1657 |
|
|
* as an FQDN query for backward compatibility.
|
| 1658 |
|
|
* Older versions set a random value to this field,
|
| 1659 |
|
|
* so it rarely varies in the defined qtypes.
|
| 1660 |
|
|
* But the mechanism is not reliable...
|
| 1661 |
|
|
* maybe we should obsolete older versions.
|
| 1662 |
|
|
*/
|
| 1663 |
|
|
qtype = NI_QTYPE_FQDN;
|
| 1664 |
|
|
/* XXX will append an mbuf */
|
| 1665 |
|
|
replylen += offsetof(struct ni_reply_fqdn, ni_fqdn_namelen);
|
| 1666 |
|
|
oldfqdn++;
|
| 1667 |
|
|
break;
|
| 1668 |
|
|
}
|
| 1669 |
|
|
|
| 1670 |
|
|
/* allocate an mbuf to reply. */
|
| 1671 |
|
|
MGETHDR(n, M_DONTWAIT, m->m_type);
|
| 1672 |
|
|
if (n == NULL) {
|
| 1673 |
|
|
m_freem(m);
|
| 1674 |
|
|
return(NULL);
|
| 1675 |
|
|
}
|
| 1676 |
|
|
#ifdef __OpenBSD__
|
| 1677 |
|
|
M_DUP_PKTHDR(n, m); /* just for rcvif */
|
| 1678 |
|
|
#else
|
| 1679 |
|
|
M_COPY_PKTHDR(n, m); /* just for rcvif */
|
| 1680 |
|
|
#endif
|
| 1681 |
|
|
if (replylen > MHLEN) {
|
| 1682 |
|
|
if (replylen > MCLBYTES) {
|
| 1683 |
|
|
/*
|
| 1684 |
|
|
* XXX: should we try to allocate more? But MCLBYTES
|
| 1685 |
|
|
* is probably much larger than IPV6_MMTU...
|
| 1686 |
|
|
*/
|
| 1687 |
|
|
goto bad;
|
| 1688 |
|
|
}
|
| 1689 |
|
|
MCLGET(n, M_DONTWAIT);
|
| 1690 |
|
|
if ((n->m_flags & M_EXT) == 0) {
|
| 1691 |
|
|
goto bad;
|
| 1692 |
|
|
}
|
| 1693 |
|
|
}
|
| 1694 |
|
|
n->m_pkthdr.len = n->m_len = replylen;
|
| 1695 |
|
|
|
| 1696 |
|
|
/* copy mbuf header and IPv6 + Node Information base headers */
|
| 1697 |
|
|
bcopy(mtod(m, caddr_t), mtod(n, caddr_t), sizeof(struct ip6_hdr));
|
| 1698 |
|
|
nni6 = (struct icmp6_nodeinfo *)(mtod(n, struct ip6_hdr *) + 1);
|
| 1699 |
|
|
bcopy((caddr_t)ni6, (caddr_t)nni6, sizeof(struct icmp6_nodeinfo));
|
| 1700 |
|
|
|
| 1701 |
|
|
/* qtype dependent procedure */
|
| 1702 |
|
|
switch (qtype) {
|
| 1703 |
|
|
case NI_QTYPE_NOOP:
|
| 1704 |
|
|
nni6->ni_code = ICMP6_NI_SUCCESS;
|
| 1705 |
|
|
nni6->ni_flags = 0;
|
| 1706 |
|
|
break;
|
| 1707 |
|
|
case NI_QTYPE_SUPTYPES:
|
| 1708 |
|
|
{
|
| 1709 |
|
|
u_int32_t v;
|
| 1710 |
|
|
nni6->ni_code = ICMP6_NI_SUCCESS;
|
| 1711 |
|
|
nni6->ni_flags = htons(0x0000); /* raw bitmap */
|
| 1712 |
|
|
/* supports NOOP, SUPTYPES, FQDN, and NODEADDR */
|
| 1713 |
|
|
v = (u_int32_t)htonl(0x0000000f);
|
| 1714 |
|
|
bcopy(&v, nni6 + 1, sizeof(u_int32_t));
|
| 1715 |
|
|
break;
|
| 1716 |
|
|
}
|
| 1717 |
|
|
case NI_QTYPE_FQDN:
|
| 1718 |
|
|
nni6->ni_code = ICMP6_NI_SUCCESS;
|
| 1719 |
|
|
fqdn = (struct ni_reply_fqdn *)(mtod(n, caddr_t) +
|
| 1720 |
|
|
sizeof(struct ip6_hdr) +
|
| 1721 |
|
|
sizeof(struct icmp6_nodeinfo));
|
| 1722 |
|
|
nni6->ni_flags = 0; /* XXX: meaningless TTL */
|
| 1723 |
|
|
fqdn->ni_fqdn_ttl = 0; /* ditto. */
|
| 1724 |
|
|
/*
|
| 1725 |
|
|
* XXX do we really have FQDN in variable "hostname"?
|
| 1726 |
|
|
*/
|
| 1727 |
|
|
n->m_next = ni6_nametodns(hostname, hostnamelen, oldfqdn);
|
| 1728 |
|
|
if (n->m_next == NULL)
|
| 1729 |
|
|
goto bad;
|
| 1730 |
|
|
/* XXX we assume that n->m_next is not a chain */
|
| 1731 |
|
|
if (n->m_next->m_next != NULL)
|
| 1732 |
|
|
goto bad;
|
| 1733 |
|
|
n->m_pkthdr.len += n->m_next->m_len;
|
| 1734 |
|
|
break;
|
| 1735 |
|
|
case NI_QTYPE_NODEADDR:
|
| 1736 |
|
|
{
|
| 1737 |
|
|
int lenlim, copied;
|
| 1738 |
|
|
|
| 1739 |
|
|
nni6->ni_code = ICMP6_NI_SUCCESS;
|
| 1740 |
|
|
n->m_pkthdr.len = n->m_len =
|
| 1741 |
|
|
sizeof(struct ip6_hdr) + sizeof(struct icmp6_nodeinfo);
|
| 1742 |
|
|
lenlim = M_TRAILINGSPACE(n);
|
| 1743 |
|
|
copied = ni6_store_addrs(ni6, nni6, ifp, lenlim);
|
| 1744 |
|
|
/* XXX: reset mbuf length */
|
| 1745 |
|
|
n->m_pkthdr.len = n->m_len = sizeof(struct ip6_hdr) +
|
| 1746 |
|
|
sizeof(struct icmp6_nodeinfo) + copied;
|
| 1747 |
|
|
break;
|
| 1748 |
|
|
}
|
| 1749 |
|
|
default:
|
| 1750 |
|
|
break; /* XXX impossible! */
|
| 1751 |
|
|
}
|
| 1752 |
|
|
|
| 1753 |
|
|
nni6->ni_type = ICMP6_NI_REPLY;
|
| 1754 |
|
|
m_freem(m);
|
| 1755 |
|
|
return(n);
|
| 1756 |
|
|
|
| 1757 |
|
|
bad:
|
| 1758 |
|
|
m_freem(m);
|
| 1759 |
|
|
if (n)
|
| 1760 |
|
|
m_freem(n);
|
| 1761 |
|
|
return(NULL);
|
| 1762 |
|
|
}
|
| 1763 |
|
|
#undef hostnamelen
|
| 1764 |
|
|
|
| 1765 |
|
|
/*
|
| 1766 |
|
|
* make a mbuf with DNS-encoded string. no compression support.
|
| 1767 |
|
|
*
|
| 1768 |
|
|
* XXX names with less than 2 dots (like "foo" or "foo.section") will be
|
| 1769 |
|
|
* treated as truncated name (two \0 at the end). this is a wild guess.
|
| 1770 |
|
|
*/
|
| 1771 |
|
|
static struct mbuf *
|
| 1772 |
|
|
ni6_nametodns(name, namelen, old)
|
| 1773 |
|
|
const char *name;
|
| 1774 |
|
|
int namelen;
|
| 1775 |
|
|
int old; /* return pascal string if non-zero */
|
| 1776 |
|
|
{
|
| 1777 |
|
|
struct mbuf *m;
|
| 1778 |
|
|
char *cp, *ep;
|
| 1779 |
|
|
const char *p, *q;
|
| 1780 |
|
|
int i, len, nterm;
|
| 1781 |
|
|
|
| 1782 |
|
|
if (old)
|
| 1783 |
|
|
len = namelen + 1;
|
| 1784 |
|
|
else
|
| 1785 |
|
|
len = MCLBYTES;
|
| 1786 |
|
|
|
| 1787 |
|
|
/* because MAXHOSTNAMELEN is usually 256, we use cluster mbuf */
|
| 1788 |
|
|
MGET(m, M_DONTWAIT, MT_DATA);
|
| 1789 |
|
|
if (m && len > MLEN) {
|
| 1790 |
|
|
MCLGET(m, M_DONTWAIT);
|
| 1791 |
|
|
if ((m->m_flags & M_EXT) == 0)
|
| 1792 |
|
|
goto fail;
|
| 1793 |
|
|
}
|
| 1794 |
|
|
if (!m)
|
| 1795 |
|
|
goto fail;
|
| 1796 |
|
|
m->m_next = NULL;
|
| 1797 |
|
|
|
| 1798 |
|
|
if (old) {
|
| 1799 |
|
|
m->m_len = len;
|
| 1800 |
|
|
*mtod(m, char *) = namelen;
|
| 1801 |
|
|
bcopy(name, mtod(m, char *) + 1, namelen);
|
| 1802 |
|
|
return m;
|
| 1803 |
|
|
} else {
|
| 1804 |
|
|
m->m_len = 0;
|
| 1805 |
|
|
cp = mtod(m, char *);
|
| 1806 |
|
|
ep = mtod(m, char *) + M_TRAILINGSPACE(m);
|
| 1807 |
|
|
|
| 1808 |
|
|
/* if not certain about my name, return empty buffer */
|
| 1809 |
|
|
if (namelen == 0)
|
| 1810 |
|
|
return m;
|
| 1811 |
|
|
|
| 1812 |
|
|
/*
|
| 1813 |
|
|
* guess if it looks like shortened hostname, or FQDN.
|
| 1814 |
|
|
* shortened hostname needs two trailing "\0".
|
| 1815 |
|
|
*/
|
| 1816 |
|
|
i = 0;
|
| 1817 |
|
|
for (p = name; p < name + namelen; p++) {
|
| 1818 |
|
|
if (*p && *p == '.')
|
| 1819 |
|
|
i++;
|
| 1820 |
|
|
}
|
| 1821 |
|
|
if (i < 2)
|
| 1822 |
|
|
nterm = 2;
|
| 1823 |
|
|
else
|
| 1824 |
|
|
nterm = 1;
|
| 1825 |
|
|
|
| 1826 |
|
|
p = name;
|
| 1827 |
|
|
while (cp < ep && p < name + namelen) {
|
| 1828 |
|
|
i = 0;
|
| 1829 |
|
|
for (q = p; q < name + namelen && *q && *q != '.'; q++)
|
| 1830 |
|
|
i++;
|
| 1831 |
|
|
/* result does not fit into mbuf */
|
| 1832 |
|
|
if (cp + i + 1 >= ep)
|
| 1833 |
|
|
goto fail;
|
| 1834 |
|
|
/*
|
| 1835 |
|
|
* DNS label length restriction, RFC1035 page 8.
|
| 1836 |
|
|
* "i == 0" case is included here to avoid returning
|
| 1837 |
|
|
* 0-length label on "foo..bar".
|
| 1838 |
|
|
*/
|
| 1839 |
|
|
if (i <= 0 || i >= 64)
|
| 1840 |
|
|
goto fail;
|
| 1841 |
|
|
*cp++ = i;
|
| 1842 |
|
|
bcopy(p, cp, i);
|
| 1843 |
|
|
cp += i;
|
| 1844 |
|
|
p = q;
|
| 1845 |
|
|
if (p < name + namelen && *p == '.')
|
| 1846 |
|
|
p++;
|
| 1847 |
|
|
}
|
| 1848 |
|
|
/* termination */
|
| 1849 |
|
|
if (cp + nterm >= ep)
|
| 1850 |
|
|
goto fail;
|
| 1851 |
|
|
while (nterm-- > 0)
|
| 1852 |
|
|
*cp++ = '\0';
|
| 1853 |
|
|
m->m_len = cp - mtod(m, char *);
|
| 1854 |
|
|
return m;
|
| 1855 |
|
|
}
|
| 1856 |
|
|
|
| 1857 |
|
|
panic("should not reach here");
|
| 1858 |
|
|
/* NOTREACHED */
|
| 1859 |
|
|
|
| 1860 |
|
|
fail:
|
| 1861 |
|
|
if (m)
|
| 1862 |
|
|
m_freem(m);
|
| 1863 |
|
|
return NULL;
|
| 1864 |
|
|
}
|
| 1865 |
|
|
|
| 1866 |
|
|
/*
|
| 1867 |
|
|
* check if two DNS-encoded string matches. takes care of truncated
|
| 1868 |
|
|
* form (with \0\0 at the end). no compression support.
|
| 1869 |
|
|
* XXX upper/lowercase match (see RFC2065)
|
| 1870 |
|
|
*/
|
| 1871 |
|
|
static int
|
| 1872 |
|
|
ni6_dnsmatch(a, alen, b, blen)
|
| 1873 |
|
|
const char *a;
|
| 1874 |
|
|
int alen;
|
| 1875 |
|
|
const char *b;
|
| 1876 |
|
|
int blen;
|
| 1877 |
|
|
{
|
| 1878 |
|
|
const char *a0, *b0;
|
| 1879 |
|
|
int l;
|
| 1880 |
|
|
|
| 1881 |
|
|
/* simplest case - need validation? */
|
| 1882 |
|
|
if (alen == blen && bcmp(a, b, alen) == 0)
|
| 1883 |
|
|
return 1;
|
| 1884 |
|
|
|
| 1885 |
|
|
a0 = a;
|
| 1886 |
|
|
b0 = b;
|
| 1887 |
|
|
|
| 1888 |
|
|
/* termination is mandatory */
|
| 1889 |
|
|
if (alen < 2 || blen < 2)
|
| 1890 |
|
|
return 0;
|
| 1891 |
|
|
if (a0[alen - 1] != '\0' || b0[blen - 1] != '\0')
|
| 1892 |
|
|
return 0;
|
| 1893 |
|
|
alen--;
|
| 1894 |
|
|
blen--;
|
| 1895 |
|
|
|
| 1896 |
|
|
while (a - a0 < alen && b - b0 < blen) {
|
| 1897 |
|
|
if (a - a0 + 1 > alen || b - b0 + 1 > blen)
|
| 1898 |
|
|
return 0;
|
| 1899 |
|
|
|
| 1900 |
|
|
if ((signed char)a[0] < 0 || (signed char)b[0] < 0)
|
| 1901 |
|
|
return 0;
|
| 1902 |
|
|
/* we don't support compression yet */
|
| 1903 |
|
|
if (a[0] >= 64 || b[0] >= 64)
|
| 1904 |
|
|
return 0;
|
| 1905 |
|
|
|
| 1906 |
|
|
/* truncated case */
|
| 1907 |
|
|
if (a[0] == 0 && a - a0 == alen - 1)
|
| 1908 |
|
|
return 1;
|
| 1909 |
|
|
if (b[0] == 0 && b - b0 == blen - 1)
|
| 1910 |
|
|
return 1;
|
| 1911 |
|
|
if (a[0] == 0 || b[0] == 0)
|
| 1912 |
|
|
return 0;
|
| 1913 |
|
|
|
| 1914 |
|
|
if (a[0] != b[0])
|
| 1915 |
|
|
return 0;
|
| 1916 |
|
|
l = a[0];
|
| 1917 |
|
|
if (a - a0 + 1 + l > alen || b - b0 + 1 + l > blen)
|
| 1918 |
|
|
return 0;
|
| 1919 |
|
|
if (bcmp(a + 1, b + 1, l) != 0)
|
| 1920 |
|
|
return 0;
|
| 1921 |
|
|
|
| 1922 |
|
|
a += 1 + l;
|
| 1923 |
|
|
b += 1 + l;
|
| 1924 |
|
|
}
|
| 1925 |
|
|
|
| 1926 |
|
|
if (a - a0 == alen && b - b0 == blen)
|
| 1927 |
|
|
return 1;
|
| 1928 |
|
|
else
|
| 1929 |
|
|
return 0;
|
| 1930 |
|
|
}
|
| 1931 |
|
|
|
| 1932 |
|
|
/*
|
| 1933 |
|
|
* calculate the number of addresses to be returned in the node info reply.
|
| 1934 |
|
|
*/
|
| 1935 |
|
|
static int
|
| 1936 |
|
|
ni6_addrs(ni6, m, ifpp, subj)
|
| 1937 |
|
|
struct icmp6_nodeinfo *ni6;
|
| 1938 |
|
|
struct mbuf *m;
|
| 1939 |
|
|
struct ifnet **ifpp;
|
| 1940 |
|
|
char *subj;
|
| 1941 |
|
|
{
|
| 1942 |
|
|
struct ifnet *ifp;
|
| 1943 |
|
|
struct in6_ifaddr *ifa6;
|
| 1944 |
|
|
struct ifaddr *ifa;
|
| 1945 |
|
|
struct sockaddr_in6 *subj_ip6 = NULL; /* XXX pedant */
|
| 1946 |
|
|
int addrs = 0, addrsofif, iffound = 0;
|
| 1947 |
|
|
int niflags = ni6->ni_flags;
|
| 1948 |
|
|
|
| 1949 |
|
|
if ((niflags & NI_NODEADDR_FLAG_ALL) == 0) {
|
| 1950 |
|
|
switch (ni6->ni_code) {
|
| 1951 |
|
|
case ICMP6_NI_SUBJ_IPV6:
|
| 1952 |
|
|
if (subj == NULL) /* must be impossible... */
|
| 1953 |
|
|
return(0);
|
| 1954 |
|
|
subj_ip6 = (struct sockaddr_in6 *)subj;
|
| 1955 |
|
|
break;
|
| 1956 |
|
|
default:
|
| 1957 |
|
|
/*
|
| 1958 |
|
|
* XXX: we only support IPv6 subject address for
|
| 1959 |
|
|
* this Qtype.
|
| 1960 |
|
|
*/
|
| 1961 |
|
|
return(0);
|
| 1962 |
|
|
}
|
| 1963 |
|
|
}
|
| 1964 |
|
|
|
| 1965 |
|
|
#if defined(__bsdi__) || (defined(__FreeBSD__) && __FreeBSD__ < 3)
|
| 1966 |
|
|
for (ifp = ifnet; ifp; ifp = ifp->if_next)
|
| 1967 |
|
|
#else
|
| 1968 |
|
|
for (ifp = TAILQ_FIRST(&ifnet); ifp; ifp = TAILQ_NEXT(ifp, if_list))
|
| 1969 |
|
|
#endif
|
| 1970 |
|
|
{
|
| 1971 |
|
|
addrsofif = 0;
|
| 1972 |
|
|
#if defined(__bsdi__) || (defined(__FreeBSD__) && __FreeBSD__ < 3)
|
| 1973 |
|
|
for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next)
|
| 1974 |
|
|
#elif defined(__FreeBSD__) && __FreeBSD__ >= 4
|
| 1975 |
|
|
TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list)
|
| 1976 |
|
|
#else
|
| 1977 |
|
|
for (ifa = ifp->if_addrlist.tqh_first; ifa;
|
| 1978 |
|
|
ifa = ifa->ifa_list.tqe_next)
|
| 1979 |
|
|
#endif
|
| 1980 |
|
|
{
|
| 1981 |
|
|
if (ifa->ifa_addr->sa_family != AF_INET6)
|
| 1982 |
|
|
continue;
|
| 1983 |
|
|
ifa6 = (struct in6_ifaddr *)ifa;
|
| 1984 |
|
|
|
| 1985 |
|
|
if ((niflags & NI_NODEADDR_FLAG_ALL) == 0 &&
|
| 1986 |
|
|
IN6_ARE_ADDR_EQUAL(&subj_ip6->sin6_addr,
|
| 1987 |
|
|
&ifa6->ia_addr.sin6_addr))
|
| 1988 |
|
|
iffound = 1;
|
| 1989 |
|
|
|
| 1990 |
|
|
/*
|
| 1991 |
|
|
* IPv4-mapped addresses can only be returned by a
|
| 1992 |
|
|
* Node Information proxy, since they represent
|
| 1993 |
|
|
* addresses of IPv4-only nodes, which perforce do
|
| 1994 |
|
|
* not implement this protocol.
|
| 1995 |
|
|
* [icmp-name-lookups-07, Section 5.4]
|
| 1996 |
|
|
* So we don't support NI_NODEADDR_FLAG_COMPAT in
|
| 1997 |
|
|
* this function at this moment.
|
| 1998 |
|
|
*/
|
| 1999 |
|
|
|
| 2000 |
|
|
/* What do we have to do about ::1? */
|
| 2001 |
|
|
switch (in6_addrscope(&ifa6->ia_addr.sin6_addr)) {
|
| 2002 |
|
|
case IPV6_ADDR_SCOPE_LINKLOCAL:
|
| 2003 |
|
|
if ((niflags & NI_NODEADDR_FLAG_LINKLOCAL) == 0)
|
| 2004 |
|
|
continue;
|
| 2005 |
|
|
break;
|
| 2006 |
|
|
case IPV6_ADDR_SCOPE_SITELOCAL:
|
| 2007 |
|
|
if ((niflags & NI_NODEADDR_FLAG_SITELOCAL) == 0)
|
| 2008 |
|
|
continue;
|
| 2009 |
|
|
break;
|
| 2010 |
|
|
case IPV6_ADDR_SCOPE_GLOBAL:
|
| 2011 |
|
|
if ((niflags & NI_NODEADDR_FLAG_GLOBAL) == 0)
|
| 2012 |
|
|
continue;
|
| 2013 |
|
|
break;
|
| 2014 |
|
|
default:
|
| 2015 |
|
|
continue;
|
| 2016 |
|
|
}
|
| 2017 |
|
|
|
| 2018 |
|
|
/*
|
| 2019 |
|
|
* check if anycast is okay.
|
| 2020 |
|
|
* XXX: just experimental. not in the spec.
|
| 2021 |
|
|
*/
|
| 2022 |
|
|
if ((ifa6->ia6_flags & IN6_IFF_ANYCAST) != 0 &&
|
| 2023 |
|
|
(niflags & NI_NODEADDR_FLAG_ANYCAST) == 0)
|
| 2024 |
|
|
continue; /* we need only unicast addresses */
|
| 2025 |
|
|
if ((ifa6->ia6_flags & IN6_IFF_TEMPORARY) != 0 &&
|
| 2026 |
|
|
(icmp6_nodeinfo & 4) == 0) {
|
| 2027 |
|
|
continue;
|
| 2028 |
|
|
}
|
| 2029 |
|
|
addrsofif++; /* count the address */
|
| 2030 |
|
|
}
|
| 2031 |
|
|
if (iffound) {
|
| 2032 |
|
|
*ifpp = ifp;
|
| 2033 |
|
|
return(addrsofif);
|
| 2034 |
|
|
}
|
| 2035 |
|
|
|
| 2036 |
|
|
addrs += addrsofif;
|
| 2037 |
|
|
}
|
| 2038 |
|
|
|
| 2039 |
|
|
return(addrs);
|
| 2040 |
|
|
}
|
| 2041 |
|
|
|
| 2042 |
|
|
static int
|
| 2043 |
|
|
ni6_store_addrs(ni6, nni6, ifp0, resid)
|
| 2044 |
|
|
struct icmp6_nodeinfo *ni6, *nni6;
|
| 2045 |
|
|
struct ifnet *ifp0;
|
| 2046 |
|
|
int resid;
|
| 2047 |
|
|
{
|
| 2048 |
|
|
#if defined(__bsdi__) || (defined(__FreeBSD__) && __FreeBSD__ < 3)
|
| 2049 |
|
|
struct ifnet *ifp = ifp0 ? ifp0 : ifnet;
|
| 2050 |
|
|
#else
|
| 2051 |
|
|
struct ifnet *ifp = ifp0 ? ifp0 : TAILQ_FIRST(&ifnet);
|
| 2052 |
|
|
#endif
|
| 2053 |
|
|
struct in6_ifaddr *ifa6;
|
| 2054 |
|
|
struct ifaddr *ifa;
|
| 2055 |
|
|
struct ifnet *ifp_dep = NULL;
|
| 2056 |
|
|
int copied = 0, allow_deprecated = 0;
|
| 2057 |
|
|
u_char *cp = (u_char *)(nni6 + 1);
|
| 2058 |
|
|
int niflags = ni6->ni_flags;
|
| 2059 |
|
|
u_int32_t ltime;
|
| 2060 |
|
|
#if !(defined(__FreeBSD__) && __FreeBSD__ >= 3)
|
| 2061 |
|
|
long time_second = time.tv_sec;
|
| 2062 |
|
|
#endif
|
| 2063 |
|
|
|
| 2064 |
|
|
if (ifp0 == NULL && !(niflags & NI_NODEADDR_FLAG_ALL))
|
| 2065 |
|
|
return(0); /* needless to copy */
|
| 2066 |
|
|
|
| 2067 |
|
|
again:
|
| 2068 |
|
|
|
| 2069 |
|
|
#if defined(__bsdi__) || (defined(__FreeBSD__) && __FreeBSD__ < 3)
|
| 2070 |
|
|
for (; ifp; ifp = ifp->if_next)
|
| 2071 |
|
|
#else
|
| 2072 |
|
|
for (; ifp; ifp = TAILQ_NEXT(ifp, if_list))
|
| 2073 |
|
|
#endif
|
| 2074 |
|
|
{
|
| 2075 |
|
|
#if defined(__bsdi__) || (defined(__FreeBSD__) && __FreeBSD__ < 3)
|
| 2076 |
|
|
for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next)
|
| 2077 |
|
|
#else
|
| 2078 |
|
|
for (ifa = ifp->if_addrlist.tqh_first; ifa;
|
| 2079 |
|
|
ifa = ifa->ifa_list.tqe_next)
|
| 2080 |
|
|
#endif
|
| 2081 |
|
|
{
|
| 2082 |
|
|
if (ifa->ifa_addr->sa_family != AF_INET6)
|
| 2083 |
|
|
continue;
|
| 2084 |
|
|
ifa6 = (struct in6_ifaddr *)ifa;
|
| 2085 |
|
|
|
| 2086 |
|
|
if (IFA6_IS_DEPRECATED(ifa6) &&
|
| 2087 |
|
|
allow_deprecated == 0) {
|
| 2088 |
|
|
/*
|
| 2089 |
|
|
* prefererred address should be put before
|
| 2090 |
|
|
* deprecated addresses.
|
| 2091 |
|
|
*/
|
| 2092 |
|
|
|
| 2093 |
|
|
/* record the interface for later search */
|
| 2094 |
|
|
if (ifp_dep == NULL)
|
| 2095 |
|
|
ifp_dep = ifp;
|
| 2096 |
|
|
|
| 2097 |
|
|
continue;
|
| 2098 |
|
|
}
|
| 2099 |
|
|
else if (!IFA6_IS_DEPRECATED(ifa6) &&
|
| 2100 |
|
|
allow_deprecated != 0)
|
| 2101 |
|
|
continue; /* we now collect deprecated addrs */
|
| 2102 |
|
|
|
| 2103 |
|
|
/* What do we have to do about ::1? */
|
| 2104 |
|
|
switch (in6_addrscope(&ifa6->ia_addr.sin6_addr)) {
|
| 2105 |
|
|
case IPV6_ADDR_SCOPE_LINKLOCAL:
|
| 2106 |
|
|
if ((niflags & NI_NODEADDR_FLAG_LINKLOCAL) == 0)
|
| 2107 |
|
|
continue;
|
| 2108 |
|
|
break;
|
| 2109 |
|
|
case IPV6_ADDR_SCOPE_SITELOCAL:
|
| 2110 |
|
|
if ((niflags & NI_NODEADDR_FLAG_SITELOCAL) == 0)
|
| 2111 |
|
|
continue;
|
| 2112 |
|
|
break;
|
| 2113 |
|
|
case IPV6_ADDR_SCOPE_GLOBAL:
|
| 2114 |
|
|
if ((niflags & NI_NODEADDR_FLAG_GLOBAL) == 0)
|
| 2115 |
|
|
continue;
|
| 2116 |
|
|
break;
|
| 2117 |
|
|
default:
|
| 2118 |
|
|
continue;
|
| 2119 |
|
|
}
|
| 2120 |
|
|
|
| 2121 |
|
|
/*
|
| 2122 |
|
|
* check if anycast is okay.
|
| 2123 |
|
|
* XXX: just experimental. not in the spec.
|
| 2124 |
|
|
*/
|
| 2125 |
|
|
if ((ifa6->ia6_flags & IN6_IFF_ANYCAST) != 0 &&
|
| 2126 |
|
|
(niflags & NI_NODEADDR_FLAG_ANYCAST) == 0)
|
| 2127 |
|
|
continue;
|
| 2128 |
|
|
if ((ifa6->ia6_flags & IN6_IFF_TEMPORARY) != 0 &&
|
| 2129 |
|
|
(icmp6_nodeinfo & 4) == 0) {
|
| 2130 |
|
|
continue;
|
| 2131 |
|
|
}
|
| 2132 |
|
|
|
| 2133 |
|
|
/* now we can copy the address */
|
| 2134 |
|
|
if (resid < sizeof(struct in6_addr) +
|
| 2135 |
|
|
sizeof(u_int32_t)) {
|
| 2136 |
|
|
/*
|
| 2137 |
|
|
* We give up much more copy.
|
| 2138 |
|
|
* Set the truncate flag and return.
|
| 2139 |
|
|
*/
|
| 2140 |
|
|
nni6->ni_flags |=
|
| 2141 |
|
|
NI_NODEADDR_FLAG_TRUNCATE;
|
| 2142 |
|
|
return(copied);
|
| 2143 |
|
|
}
|
| 2144 |
|
|
|
| 2145 |
|
|
/*
|
| 2146 |
|
|
* Set the TTL of the address.
|
| 2147 |
|
|
* The TTL value should be one of the following
|
| 2148 |
|
|
* according to the specification:
|
| 2149 |
|
|
*
|
| 2150 |
|
|
* 1. The remaining lifetime of a DHCP lease on the
|
| 2151 |
|
|
* address, or
|
| 2152 |
|
|
* 2. The remaining Valid Lifetime of a prefix from
|
| 2153 |
|
|
* which the address was derived through Stateless
|
| 2154 |
|
|
* Autoconfiguration.
|
| 2155 |
|
|
*
|
| 2156 |
|
|
* Note that we currently do not support stateful
|
| 2157 |
|
|
* address configuration by DHCPv6, so the former
|
| 2158 |
|
|
* case can't happen.
|
| 2159 |
|
|
*
|
| 2160 |
|
|
* TTL must be 2^31 > TTL >= 0.
|
| 2161 |
|
|
*/
|
| 2162 |
|
|
if (ifa6->ia6_lifetime.ia6t_expire == 0)
|
| 2163 |
|
|
ltime = ND6_INFINITE_LIFETIME;
|
| 2164 |
|
|
else {
|
| 2165 |
|
|
if (ifa6->ia6_lifetime.ia6t_expire >
|
| 2166 |
|
|
time_second) {
|
| 2167 |
|
|
ltime = ifa6->ia6_lifetime.ia6t_expire
|
| 2168 |
|
|
- time_second;
|
| 2169 |
|
|
} else
|
| 2170 |
|
|
ltime = 0;
|
| 2171 |
|
|
}
|
| 2172 |
|
|
if (ltime > 0x7fffffff)
|
| 2173 |
|
|
ltime = 0x7fffffff;
|
| 2174 |
|
|
ltime = htonl(ltime);
|
| 2175 |
|
|
|
| 2176 |
|
|
bcopy(<ime, cp, sizeof(u_int32_t));
|
| 2177 |
|
|
cp += sizeof(u_int32_t);
|
| 2178 |
|
|
|
| 2179 |
|
|
/* copy the address itself */
|
| 2180 |
|
|
bcopy(&ifa6->ia_addr.sin6_addr, cp,
|
| 2181 |
|
|
sizeof(struct in6_addr));
|
| 2182 |
|
|
/* XXX: KAME link-local hack; remove ifindex */
|
| 2183 |
|
|
if (IN6_IS_ADDR_LINKLOCAL(&ifa6->ia_addr.sin6_addr))
|
| 2184 |
|
|
((struct in6_addr *)cp)->s6_addr16[1] = 0;
|
| 2185 |
|
|
cp += sizeof(struct in6_addr);
|
| 2186 |
|
|
|
| 2187 |
|
|
resid -= (sizeof(struct in6_addr) + sizeof(u_int32_t));
|
| 2188 |
|
|
copied += (sizeof(struct in6_addr) +
|
| 2189 |
|
|
sizeof(u_int32_t));
|
| 2190 |
|
|
}
|
| 2191 |
|
|
if (ifp0) /* we need search only on the specified IF */
|
| 2192 |
|
|
break;
|
| 2193 |
|
|
}
|
| 2194 |
|
|
|
| 2195 |
|
|
if (allow_deprecated == 0 && ifp_dep != NULL) {
|
| 2196 |
|
|
ifp = ifp_dep;
|
| 2197 |
|
|
allow_deprecated = 1;
|
| 2198 |
|
|
|
| 2199 |
|
|
goto again;
|
| 2200 |
|
|
}
|
| 2201 |
|
|
|
| 2202 |
|
|
return(copied);
|
| 2203 |
|
|
}
|
| 2204 |
|
|
|
| 2205 |
|
|
/*
|
| 2206 |
|
|
* XXX almost dup'ed code with rip6_input.
|
| 2207 |
|
|
*/
|
| 2208 |
|
|
static int
|
| 2209 |
|
|
icmp6_rip6_input(mp, off)
|
| 2210 |
|
|
struct mbuf **mp;
|
| 2211 |
|
|
int off;
|
| 2212 |
|
|
{
|
| 2213 |
|
|
struct mbuf *m = *mp;
|
| 2214 |
|
|
struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
|
| 2215 |
|
|
struct in6pcb *in6p;
|
| 2216 |
|
|
struct in6pcb *last = NULL;
|
| 2217 |
|
|
struct sockaddr_in6 rip6src;
|
| 2218 |
|
|
struct icmp6_hdr *icmp6;
|
| 2219 |
|
|
struct ip6_recvpktopts opts;
|
| 2220 |
|
|
|
| 2221 |
|
|
#ifndef PULLDOWN_TEST
|
| 2222 |
|
|
/* this is assumed to be safe. */
|
| 2223 |
|
|
icmp6 = (struct icmp6_hdr *)((caddr_t)ip6 + off);
|
| 2224 |
|
|
#else
|
| 2225 |
|
|
IP6_EXTHDR_GET(icmp6, struct icmp6_hdr *, m, off, sizeof(*icmp6));
|
| 2226 |
|
|
if (icmp6 == NULL) {
|
| 2227 |
|
|
/* m is already reclaimed */
|
| 2228 |
|
|
return IPPROTO_DONE;
|
| 2229 |
|
|
}
|
| 2230 |
|
|
#endif
|
| 2231 |
|
|
|
| 2232 |
|
|
bzero(&opts, sizeof(opts));
|
| 2233 |
|
|
bzero(&rip6src, sizeof(rip6src));
|
| 2234 |
|
|
rip6src.sin6_len = sizeof(struct sockaddr_in6);
|
| 2235 |
|
|
rip6src.sin6_family = AF_INET6;
|
| 2236 |
|
|
/* KAME hack: recover scopeid */
|
| 2237 |
|
|
(void)in6_recoverscope(&rip6src, &ip6->ip6_src, m->m_pkthdr.rcvif);
|
| 2238 |
|
|
|
| 2239 |
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
|
| 2240 |
|
|
LIST_FOREACH(in6p, &ripcb, inp_list)
|
| 2241 |
|
|
#elif defined(__OpenBSD__)
|
| 2242 |
|
|
for (in6p = rawin6pcbtable.inpt_queue.cqh_first;
|
| 2243 |
|
|
in6p != (struct inpcb *)&rawin6pcbtable.inpt_queue;
|
| 2244 |
|
|
in6p = in6p->inp_queue.cqe_next)
|
| 2245 |
|
|
#else
|
| 2246 |
|
|
for (in6p = rawin6pcb.in6p_next;
|
| 2247 |
|
|
in6p != &rawin6pcb; in6p = in6p->in6p_next)
|
| 2248 |
|
|
#endif
|
| 2249 |
|
|
{
|
| 2250 |
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
|
| 2251 |
|
|
if ((in6p->inp_vflag & INP_IPV6) == 0)
|
| 2252 |
|
|
continue;
|
| 2253 |
|
|
#endif
|
| 2254 |
|
|
#ifdef HAVE_NRL_INPCB
|
| 2255 |
|
|
if (!(in6p->in6p_flags & INP_IPV6))
|
| 2256 |
|
|
continue;
|
| 2257 |
|
|
#endif
|
| 2258 |
|
|
if (in6p->in6p_ip6_nxt != IPPROTO_ICMPV6)
|
| 2259 |
|
|
continue;
|
| 2260 |
|
|
if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) &&
|
| 2261 |
|
|
!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst))
|
| 2262 |
|
|
continue;
|
| 2263 |
|
|
if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) &&
|
| 2264 |
|
|
!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src))
|
| 2265 |
|
|
continue;
|
| 2266 |
|
|
if (in6p->in6p_icmp6filt
|
| 2267 |
|
|
&& ICMP6_FILTER_WILLBLOCK(icmp6->icmp6_type,
|
| 2268 |
|
|
in6p->in6p_icmp6filt))
|
| 2269 |
|
|
continue;
|
| 2270 |
|
|
if (last) {
|
| 2271 |
|
|
struct mbuf *n;
|
| 2272 |
|
|
if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) {
|
| 2273 |
|
|
if (last->in6p_flags & IN6P_CONTROLOPTS)
|
| 2274 |
|
|
ip6_savecontrol(last, ip6, n, &opts,
|
| 2275 |
|
|
NULL);
|
| 2276 |
|
|
/* strip intermediate headers */
|
| 2277 |
|
|
m_adj(n, off);
|
| 2278 |
|
|
if (sbappendaddr(&last->in6p_socket->so_rcv,
|
| 2279 |
|
|
(struct sockaddr *)&rip6src,
|
| 2280 |
|
|
n, opts.head) == 0) {
|
| 2281 |
|
|
/* should notify about lost packet */
|
| 2282 |
|
|
m_freem(n);
|
| 2283 |
|
|
if (opts.head) {
|
| 2284 |
|
|
m_freem(opts.head);
|
| 2285 |
|
|
}
|
| 2286 |
|
|
} else
|
| 2287 |
|
|
sorwakeup(last->in6p_socket);
|
| 2288 |
|
|
bzero(&opts, sizeof(opts));
|
| 2289 |
|
|
}
|
| 2290 |
|
|
}
|
| 2291 |
|
|
last = in6p;
|
| 2292 |
|
|
}
|
| 2293 |
|
|
if (last) {
|
| 2294 |
|
|
if (last->in6p_flags & IN6P_CONTROLOPTS)
|
| 2295 |
|
|
ip6_savecontrol(last, ip6, m, &opts, NULL);
|
| 2296 |
|
|
/* strip intermediate headers */
|
| 2297 |
|
|
m_adj(m, off);
|
| 2298 |
|
|
if (sbappendaddr(&last->in6p_socket->so_rcv,
|
| 2299 |
|
|
(struct sockaddr *)&rip6src,
|
| 2300 |
|
|
m, opts.head) == 0) {
|
| 2301 |
|
|
m_freem(m);
|
| 2302 |
|
|
if (opts.head)
|
| 2303 |
|
|
m_freem(opts.head);
|
| 2304 |
|
|
} else
|
| 2305 |
|
|
sorwakeup(last->in6p_socket);
|
| 2306 |
|
|
} else {
|
| 2307 |
|
|
m_freem(m);
|
| 2308 |
|
|
ip6stat.ip6s_delivered--;
|
| 2309 |
|
|
}
|
| 2310 |
|
|
return IPPROTO_DONE;
|
| 2311 |
|
|
}
|
| 2312 |
|
|
|
| 2313 |
|
|
/*
|
| 2314 |
|
|
* Reflect the ip6 packet back to the source.
|
| 2315 |
|
|
* OFF points to the icmp6 header, counted from the top of the mbuf.
|
| 2316 |
|
|
*
|
| 2317 |
|
|
* Note: RFC 1885 required that an echo reply should be truncated if it
|
| 2318 |
|
|
* did not fit in with (return) path MTU, and KAME code supported the
|
| 2319 |
|
|
* behavior. However, as a clarification after the RFC, this limitation
|
| 2320 |
|
|
* was removed in a revised version of the spec, RFC 2463. We had kept the
|
| 2321 |
|
|
* old behavior, with a (non-default) ifdef block, while the new version of
|
| 2322 |
|
|
* the spec was an internet-draft status, and even after the new RFC was
|
| 2323 |
|
|
* published. But it would rather make sense to clean the obsoleted part
|
| 2324 |
|
|
* up, and to make the code simpler at this stage.
|
| 2325 |
|
|
*/
|
| 2326 |
|
|
void
|
| 2327 |
|
|
icmp6_reflect(m, off)
|
| 2328 |
|
|
struct mbuf *m;
|
| 2329 |
|
|
size_t off;
|
| 2330 |
|
|
{
|
| 2331 |
|
|
struct ip6_hdr *ip6;
|
| 2332 |
|
|
struct icmp6_hdr *icmp6;
|
| 2333 |
|
|
struct in6_ifaddr *ia;
|
| 2334 |
|
|
struct in6_addr t, *src = 0;
|
| 2335 |
|
|
int plen;
|
| 2336 |
|
|
int type, code;
|
| 2337 |
|
|
struct ifnet *outif = NULL;
|
| 2338 |
|
|
struct sockaddr_in6 sa6_src, sa6_dst;
|
| 2339 |
|
|
|
| 2340 |
|
|
/* too short to reflect */
|
| 2341 |
|
|
if (off < sizeof(struct ip6_hdr)) {
|
| 2342 |
|
|
nd6log((LOG_DEBUG,
|
| 2343 |
|
|
"sanity fail: off=%lx, sizeof(ip6)=%lx in %s:%d\n",
|
| 2344 |
|
|
(u_long)off, (u_long)sizeof(struct ip6_hdr),
|
| 2345 |
|
|
__FILE__, __LINE__));
|
| 2346 |
|
|
goto bad;
|
| 2347 |
|
|
}
|
| 2348 |
|
|
|
| 2349 |
|
|
/*
|
| 2350 |
|
|
* If there are extra headers between IPv6 and ICMPv6, strip
|
| 2351 |
|
|
* off that header first.
|
| 2352 |
|
|
*/
|
| 2353 |
|
|
#ifdef DIAGNOSTIC
|
| 2354 |
|
|
if (sizeof(struct ip6_hdr) + sizeof(struct icmp6_hdr) > MHLEN)
|
| 2355 |
|
|
panic("assumption failed in icmp6_reflect");
|
| 2356 |
|
|
#endif
|
| 2357 |
|
|
if (off > sizeof(struct ip6_hdr)) {
|
| 2358 |
|
|
size_t l;
|
| 2359 |
|
|
struct ip6_hdr nip6;
|
| 2360 |
|
|
|
| 2361 |
|
|
l = off - sizeof(struct ip6_hdr);
|
| 2362 |
|
|
m_copydata(m, 0, sizeof(nip6), (caddr_t)&nip6);
|
| 2363 |
|
|
m_adj(m, l);
|
| 2364 |
|
|
l = sizeof(struct ip6_hdr) + sizeof(struct icmp6_hdr);
|
| 2365 |
|
|
if (m->m_len < l) {
|
| 2366 |
|
|
if ((m = m_pullup(m, l)) == NULL)
|
| 2367 |
|
|
return;
|
| 2368 |
|
|
}
|
| 2369 |
|
|
bcopy((caddr_t)&nip6, mtod(m, caddr_t), sizeof(nip6));
|
| 2370 |
|
|
} else /* off == sizeof(struct ip6_hdr) */ {
|
| 2371 |
|
|
size_t l;
|
| 2372 |
|
|
l = sizeof(struct ip6_hdr) + sizeof(struct icmp6_hdr);
|
| 2373 |
|
|
if (m->m_len < l) {
|
| 2374 |
|
|
if ((m = m_pullup(m, l)) == NULL)
|
| 2375 |
|
|
return;
|
| 2376 |
|
|
}
|
| 2377 |
|
|
}
|
| 2378 |
|
|
plen = m->m_pkthdr.len - sizeof(struct ip6_hdr);
|
| 2379 |
|
|
ip6 = mtod(m, struct ip6_hdr *);
|
| 2380 |
|
|
ip6->ip6_nxt = IPPROTO_ICMPV6;
|
| 2381 |
|
|
icmp6 = (struct icmp6_hdr *)(ip6 + 1);
|
| 2382 |
|
|
type = icmp6->icmp6_type; /* keep type for statistics */
|
| 2383 |
|
|
code = icmp6->icmp6_code; /* ditto. */
|
| 2384 |
|
|
|
| 2385 |
|
|
t = ip6->ip6_dst;
|
| 2386 |
|
|
/*
|
| 2387 |
|
|
* ip6_input() drops a packet if its src is multicast.
|
| 2388 |
|
|
* So, the src is never multicast.
|
| 2389 |
|
|
*/
|
| 2390 |
|
|
ip6->ip6_dst = ip6->ip6_src;
|
| 2391 |
|
|
|
| 2392 |
|
|
/*
|
| 2393 |
|
|
* XXX: make sure to embed scope zone information, using
|
| 2394 |
|
|
* already embedded IDs or the received interface (if any).
|
| 2395 |
|
|
* Note that rcvif may be NULL.
|
| 2396 |
|
|
* TODO: scoped routing case (XXX).
|
| 2397 |
|
|
*/
|
| 2398 |
|
|
bzero(&sa6_src, sizeof(sa6_src));
|
| 2399 |
|
|
sa6_src.sin6_family = AF_INET6;
|
| 2400 |
|
|
sa6_src.sin6_len = sizeof(sa6_src);
|
| 2401 |
|
|
sa6_src.sin6_addr = ip6->ip6_dst;
|
| 2402 |
|
|
in6_recoverscope(&sa6_src, &ip6->ip6_dst, m->m_pkthdr.rcvif);
|
| 2403 |
|
|
in6_embedscope(&sa6_src.sin6_addr, &sa6_src);
|
| 2404 |
|
|
ip6->ip6_dst = sa6_src.sin6_addr;
|
| 2405 |
|
|
|
| 2406 |
|
|
bzero(&sa6_dst, sizeof(sa6_dst));
|
| 2407 |
|
|
sa6_dst.sin6_family = AF_INET6;
|
| 2408 |
|
|
sa6_dst.sin6_len = sizeof(sa6_dst);
|
| 2409 |
|
|
sa6_dst.sin6_addr = t;
|
| 2410 |
|
|
in6_recoverscope(&sa6_dst, &t, m->m_pkthdr.rcvif);
|
| 2411 |
|
|
in6_embedscope(&t, &sa6_dst);
|
| 2412 |
|
|
|
| 2413 |
|
|
/*
|
| 2414 |
|
|
* If the incoming packet was addressed directly to us (i.e. unicast),
|
| 2415 |
|
|
* use dst as the src for the reply.
|
| 2416 |
|
|
* The IN6_IFF_NOTREADY case would be VERY rare, but is possible
|
| 2417 |
|
|
* (for example) when we encounter an error while forwarding procedure
|
| 2418 |
|
|
* destined to a duplicated address of ours.
|
| 2419 |
|
|
*/
|
| 2420 |
|
|
for (ia = in6_ifaddr; ia; ia = ia->ia_next)
|
| 2421 |
|
|
if (IN6_ARE_ADDR_EQUAL(&t, &ia->ia_addr.sin6_addr) &&
|
| 2422 |
|
|
(ia->ia6_flags & (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY)) == 0) {
|
| 2423 |
|
|
src = &t;
|
| 2424 |
|
|
break;
|
| 2425 |
|
|
}
|
| 2426 |
|
|
if (ia == NULL && IN6_IS_ADDR_LINKLOCAL(&t) && (m->m_flags & M_LOOP)) {
|
| 2427 |
|
|
/*
|
| 2428 |
|
|
* This is the case if the dst is our link-local address
|
| 2429 |
|
|
* and the sender is also ourselves.
|
| 2430 |
|
|
*/
|
| 2431 |
|
|
src = &t;
|
| 2432 |
|
|
}
|
| 2433 |
|
|
|
| 2434 |
|
|
if (src == 0) {
|
| 2435 |
|
|
int e;
|
| 2436 |
|
|
#ifdef NEW_STRUCT_ROUTE
|
| 2437 |
|
|
struct route ro;
|
| 2438 |
|
|
#else
|
| 2439 |
|
|
struct route_in6 ro;
|
| 2440 |
|
|
#endif
|
| 2441 |
|
|
|
| 2442 |
|
|
/*
|
| 2443 |
|
|
* This case matches to multicasts, our anycast, or unicasts
|
| 2444 |
|
|
* that we do not own. Select a source address based on the
|
| 2445 |
|
|
* source address of the erroneous packet.
|
| 2446 |
|
|
*/
|
| 2447 |
|
|
bzero(&ro, sizeof(ro));
|
| 2448 |
|
|
src = in6_selectsrc(&sa6_src, NULL, NULL, &ro, NULL, NULL, &e);
|
| 2449 |
|
|
if (ro.ro_rt) { /* XXX: see comments in icmp6_mtudisc_update */
|
| 2450 |
|
|
RTFREE(ro.ro_rt); /* XXX: we could use this */
|
| 2451 |
|
|
}
|
| 2452 |
|
|
if (src == NULL) {
|
| 2453 |
|
|
nd6log((LOG_DEBUG,
|
| 2454 |
|
|
"icmp6_reflect: source can't be determined: "
|
| 2455 |
|
|
"dst=%s, error=%d\n",
|
| 2456 |
|
|
ip6_sprintf(&sa6_src.sin6_addr), e));
|
| 2457 |
|
|
goto bad;
|
| 2458 |
|
|
}
|
| 2459 |
|
|
}
|
| 2460 |
|
|
|
| 2461 |
|
|
ip6->ip6_src = *src;
|
| 2462 |
|
|
|
| 2463 |
|
|
ip6->ip6_flow = 0;
|
| 2464 |
|
|
ip6->ip6_vfc &= ~IPV6_VERSION_MASK;
|
| 2465 |
|
|
ip6->ip6_vfc |= IPV6_VERSION;
|
| 2466 |
|
|
ip6->ip6_nxt = IPPROTO_ICMPV6;
|
| 2467 |
|
|
if (m->m_pkthdr.rcvif) {
|
| 2468 |
|
|
/* XXX: This may not be the outgoing interface */
|
| 2469 |
|
|
ip6->ip6_hlim = nd_ifinfo[m->m_pkthdr.rcvif->if_index].chlim;
|
| 2470 |
|
|
} else
|
| 2471 |
|
|
ip6->ip6_hlim = ip6_defhlim;
|
| 2472 |
|
|
|
| 2473 |
|
|
icmp6->icmp6_cksum = 0;
|
| 2474 |
|
|
icmp6->icmp6_cksum = in6_cksum(m, IPPROTO_ICMPV6,
|
| 2475 |
|
|
sizeof(struct ip6_hdr), plen);
|
| 2476 |
|
|
|
| 2477 |
|
|
/*
|
| 2478 |
|
|
* XXX option handling
|
| 2479 |
|
|
*/
|
| 2480 |
|
|
|
| 2481 |
|
|
m->m_flags &= ~(M_BCAST|M_MCAST);
|
| 2482 |
|
|
#ifdef IPSEC
|
| 2483 |
|
|
/* Don't lookup socket */
|
| 2484 |
|
|
(void)ipsec_setsocket(m, NULL);
|
| 2485 |
|
|
#endif /* IPSEC */
|
| 2486 |
|
|
|
| 2487 |
|
|
/*
|
| 2488 |
|
|
* To avoid a "too big" situation at an intermediate router
|
| 2489 |
|
|
* and the path MTU discovery process, specify the IPV6_MINMTU flag.
|
| 2490 |
|
|
* Note that only echo and node information replies are affected,
|
| 2491 |
|
|
* since the length of ICMP6 errors is limited to the minimum MTU.
|
| 2492 |
|
|
*/
|
| 2493 |
|
|
if (ip6_output(m, NULL, NULL, IPV6_MINMTU, NULL, &outif) != 0 && outif)
|
| 2494 |
|
|
icmp6_ifstat_inc(outif, ifs6_out_error);
|
| 2495 |
|
|
|
| 2496 |
|
|
if (outif)
|
| 2497 |
|
|
icmp6_ifoutstat_inc(outif, type, code);
|
| 2498 |
|
|
|
| 2499 |
|
|
return;
|
| 2500 |
|
|
|
| 2501 |
|
|
bad:
|
| 2502 |
|
|
m_freem(m);
|
| 2503 |
|
|
return;
|
| 2504 |
|
|
}
|
| 2505 |
|
|
|
| 2506 |
|
|
void
|
| 2507 |
|
|
icmp6_fasttimo()
|
| 2508 |
|
|
{
|
| 2509 |
|
|
|
| 2510 |
|
|
mld6_fasttimeo();
|
| 2511 |
|
|
}
|
| 2512 |
|
|
|
| 2513 |
|
|
static const char *
|
| 2514 |
|
|
icmp6_redirect_diag(src6, dst6, tgt6)
|
| 2515 |
|
|
struct in6_addr *src6;
|
| 2516 |
|
|
struct in6_addr *dst6;
|
| 2517 |
|
|
struct in6_addr *tgt6;
|
| 2518 |
|
|
{
|
| 2519 |
|
|
static char buf[1024];
|
| 2520 |
|
|
#ifndef __bsdi__
|
| 2521 |
|
|
snprintf(buf, sizeof(buf), "(src=%s dst=%s tgt=%s)",
|
| 2522 |
|
|
ip6_sprintf(src6), ip6_sprintf(dst6), ip6_sprintf(tgt6));
|
| 2523 |
|
|
#else
|
| 2524 |
|
|
sprintf(buf, "(src=%s dst=%s tgt=%s)",
|
| 2525 |
|
|
ip6_sprintf(src6), ip6_sprintf(dst6), ip6_sprintf(tgt6));
|
| 2526 |
|
|
#endif
|
| 2527 |
|
|
return buf;
|
| 2528 |
|
|
}
|
| 2529 |
|
|
|
| 2530 |
|
|
void
|
| 2531 |
|
|
icmp6_redirect_input(m, off)
|
| 2532 |
|
|
struct mbuf *m;
|
| 2533 |
|
|
int off;
|
| 2534 |
|
|
{
|
| 2535 |
|
|
struct ifnet *ifp = m->m_pkthdr.rcvif;
|
| 2536 |
|
|
struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
|
| 2537 |
|
|
struct nd_redirect *nd_rd;
|
| 2538 |
|
|
int icmp6len = ntohs(ip6->ip6_plen);
|
| 2539 |
|
|
char *lladdr = NULL;
|
| 2540 |
|
|
int lladdrlen = 0;
|
| 2541 |
|
|
u_char *redirhdr = NULL;
|
| 2542 |
|
|
int redirhdrlen = 0;
|
| 2543 |
|
|
struct rtentry *rt = NULL;
|
| 2544 |
|
|
int is_router;
|
| 2545 |
|
|
int is_onlink;
|
| 2546 |
|
|
struct in6_addr src6 = ip6->ip6_src;
|
| 2547 |
|
|
struct in6_addr redtgt6;
|
| 2548 |
|
|
struct in6_addr reddst6;
|
| 2549 |
|
|
union nd_opts ndopts;
|
| 2550 |
|
|
|
| 2551 |
|
|
if (!m || !ifp)
|
| 2552 |
|
|
return;
|
| 2553 |
|
|
|
| 2554 |
|
|
/* XXX if we are router, we don't update route by icmp6 redirect */
|
| 2555 |
|
|
if (ip6_forwarding)
|
| 2556 |
|
|
goto freeit;
|
| 2557 |
|
|
if (!icmp6_rediraccept)
|
| 2558 |
|
|
goto freeit;
|
| 2559 |
|
|
|
| 2560 |
|
|
#ifndef PULLDOWN_TEST
|
| 2561 |
|
|
IP6_EXTHDR_CHECK(m, off, icmp6len,);
|
| 2562 |
|
|
nd_rd = (struct nd_redirect *)((caddr_t)ip6 + off);
|
| 2563 |
|
|
#else
|
| 2564 |
|
|
IP6_EXTHDR_GET(nd_rd, struct nd_redirect *, m, off, icmp6len);
|
| 2565 |
|
|
if (nd_rd == NULL) {
|
| 2566 |
|
|
icmp6stat.icp6s_tooshort++;
|
| 2567 |
|
|
return;
|
| 2568 |
|
|
}
|
| 2569 |
|
|
#endif
|
| 2570 |
|
|
redtgt6 = nd_rd->nd_rd_target;
|
| 2571 |
|
|
reddst6 = nd_rd->nd_rd_dst;
|
| 2572 |
|
|
|
| 2573 |
|
|
if (IN6_IS_ADDR_LINKLOCAL(&redtgt6))
|
| 2574 |
|
|
redtgt6.s6_addr16[1] = htons(ifp->if_index);
|
| 2575 |
|
|
if (IN6_IS_ADDR_LINKLOCAL(&reddst6))
|
| 2576 |
|
|
reddst6.s6_addr16[1] = htons(ifp->if_index);
|
| 2577 |
|
|
|
| 2578 |
|
|
/* validation */
|
| 2579 |
|
|
if (!IN6_IS_ADDR_LINKLOCAL(&src6)) {
|
| 2580 |
|
|
nd6log((LOG_ERR,
|
| 2581 |
|
|
"ICMP6 redirect sent from %s rejected; "
|
| 2582 |
|
|
"must be from linklocal\n", ip6_sprintf(&src6)));
|
| 2583 |
|
|
goto bad;
|
| 2584 |
|
|
}
|
| 2585 |
|
|
if (ip6->ip6_hlim != 255) {
|
| 2586 |
|
|
nd6log((LOG_ERR,
|
| 2587 |
|
|
"ICMP6 redirect sent from %s rejected; "
|
| 2588 |
|
|
"hlim=%d (must be 255)\n",
|
| 2589 |
|
|
ip6_sprintf(&src6), ip6->ip6_hlim));
|
| 2590 |
|
|
goto bad;
|
| 2591 |
|
|
}
|
| 2592 |
|
|
{
|
| 2593 |
|
|
/* ip6->ip6_src must be equal to gw for icmp6->icmp6_reddst */
|
| 2594 |
|
|
struct sockaddr_in6 sin6;
|
| 2595 |
|
|
struct in6_addr *gw6;
|
| 2596 |
|
|
|
| 2597 |
|
|
bzero(&sin6, sizeof(sin6));
|
| 2598 |
|
|
sin6.sin6_family = AF_INET6;
|
| 2599 |
|
|
sin6.sin6_len = sizeof(struct sockaddr_in6);
|
| 2600 |
|
|
bcopy(&reddst6, &sin6.sin6_addr, sizeof(reddst6));
|
| 2601 |
|
|
rt = rtalloc1((struct sockaddr *)&sin6, 0
|
| 2602 |
|
|
#ifdef __FreeBSD__
|
| 2603 |
|
|
, 0UL
|
| 2604 |
|
|
#endif
|
| 2605 |
|
|
);
|
| 2606 |
|
|
if (rt) {
|
| 2607 |
|
|
if (rt->rt_gateway == NULL ||
|
| 2608 |
|
|
rt->rt_gateway->sa_family != AF_INET6) {
|
| 2609 |
|
|
nd6log((LOG_ERR,
|
| 2610 |
|
|
"ICMP6 redirect rejected; no route "
|
| 2611 |
|
|
"with inet6 gateway found for redirect dst: %s\n",
|
| 2612 |
|
|
icmp6_redirect_diag(&src6, &reddst6, &redtgt6)));
|
| 2613 |
|
|
RTFREE(rt);
|
| 2614 |
|
|
goto bad;
|
| 2615 |
|
|
}
|
| 2616 |
|
|
|
| 2617 |
|
|
gw6 = &(((struct sockaddr_in6 *)rt->rt_gateway)->sin6_addr);
|
| 2618 |
|
|
if (bcmp(&src6, gw6, sizeof(struct in6_addr)) != 0) {
|
| 2619 |
|
|
nd6log((LOG_ERR,
|
| 2620 |
|
|
"ICMP6 redirect rejected; "
|
| 2621 |
|
|
"not equal to gw-for-src=%s (must be same): "
|
| 2622 |
|
|
"%s\n",
|
| 2623 |
|
|
ip6_sprintf(gw6),
|
| 2624 |
|
|
icmp6_redirect_diag(&src6, &reddst6, &redtgt6)));
|
| 2625 |
|
|
RTFREE(rt);
|
| 2626 |
|
|
goto bad;
|
| 2627 |
|
|
}
|
| 2628 |
|
|
} else {
|
| 2629 |
|
|
nd6log((LOG_ERR,
|
| 2630 |
|
|
"ICMP6 redirect rejected; "
|
| 2631 |
|
|
"no route found for redirect dst: %s\n",
|
| 2632 |
|
|
icmp6_redirect_diag(&src6, &reddst6, &redtgt6)));
|
| 2633 |
|
|
goto bad;
|
| 2634 |
|
|
}
|
| 2635 |
|
|
RTFREE(rt);
|
| 2636 |
|
|
rt = NULL;
|
| 2637 |
|
|
}
|
| 2638 |
|
|
if (IN6_IS_ADDR_MULTICAST(&reddst6)) {
|
| 2639 |
|
|
nd6log((LOG_ERR,
|
| 2640 |
|
|
"ICMP6 redirect rejected; "
|
| 2641 |
|
|
"redirect dst must be unicast: %s\n",
|
| 2642 |
|
|
icmp6_redirect_diag(&src6, &reddst6, &redtgt6)));
|
| 2643 |
|
|
goto bad;
|
| 2644 |
|
|
}
|
| 2645 |
|
|
|
| 2646 |
|
|
is_router = is_onlink = 0;
|
| 2647 |
|
|
if (IN6_IS_ADDR_LINKLOCAL(&redtgt6))
|
| 2648 |
|
|
is_router = 1; /* router case */
|
| 2649 |
|
|
if (bcmp(&redtgt6, &reddst6, sizeof(redtgt6)) == 0)
|
| 2650 |
|
|
is_onlink = 1; /* on-link destination case */
|
| 2651 |
|
|
if (!is_router && !is_onlink) {
|
| 2652 |
|
|
nd6log((LOG_ERR,
|
| 2653 |
|
|
"ICMP6 redirect rejected; "
|
| 2654 |
|
|
"neither router case nor onlink case: %s\n",
|
| 2655 |
|
|
icmp6_redirect_diag(&src6, &reddst6, &redtgt6)));
|
| 2656 |
|
|
goto bad;
|
| 2657 |
|
|
}
|
| 2658 |
|
|
/* validation passed */
|
| 2659 |
|
|
|
| 2660 |
|
|
icmp6len -= sizeof(*nd_rd);
|
| 2661 |
|
|
nd6_option_init(nd_rd + 1, icmp6len, &ndopts);
|
| 2662 |
|
|
if (nd6_options(&ndopts) < 0) {
|
| 2663 |
|
|
nd6log((LOG_INFO, "icmp6_redirect_input: "
|
| 2664 |
|
|
"invalid ND option, rejected: %s\n",
|
| 2665 |
|
|
icmp6_redirect_diag(&src6, &reddst6, &redtgt6)));
|
| 2666 |
|
|
/* nd6_options have incremented stats */
|
| 2667 |
|
|
goto freeit;
|
| 2668 |
|
|
}
|
| 2669 |
|
|
|
| 2670 |
|
|
if (ndopts.nd_opts_tgt_lladdr) {
|
| 2671 |
|
|
lladdr = (char *)(ndopts.nd_opts_tgt_lladdr + 1);
|
| 2672 |
|
|
lladdrlen = ndopts.nd_opts_tgt_lladdr->nd_opt_len << 3;
|
| 2673 |
|
|
}
|
| 2674 |
|
|
|
| 2675 |
|
|
if (ndopts.nd_opts_rh) {
|
| 2676 |
|
|
redirhdrlen = ndopts.nd_opts_rh->nd_opt_rh_len;
|
| 2677 |
|
|
redirhdr = (u_char *)(ndopts.nd_opts_rh + 1); /* xxx */
|
| 2678 |
|
|
}
|
| 2679 |
|
|
|
| 2680 |
|
|
if (lladdr && ((ifp->if_addrlen + 2 + 7) & ~7) != lladdrlen) {
|
| 2681 |
|
|
nd6log((LOG_INFO,
|
| 2682 |
|
|
"icmp6_redirect_input: lladdrlen mismatch for %s "
|
| 2683 |
|
|
"(if %d, icmp6 packet %d): %s\n",
|
| 2684 |
|
|
ip6_sprintf(&redtgt6), ifp->if_addrlen, lladdrlen - 2,
|
| 2685 |
|
|
icmp6_redirect_diag(&src6, &reddst6, &redtgt6)));
|
| 2686 |
|
|
goto bad;
|
| 2687 |
|
|
}
|
| 2688 |
|
|
|
| 2689 |
|
|
/* RFC 2461 8.3 */
|
| 2690 |
|
|
nd6_cache_lladdr(ifp, &redtgt6, lladdr, lladdrlen, ND_REDIRECT,
|
| 2691 |
|
|
is_onlink ? ND_REDIRECT_ONLINK : ND_REDIRECT_ROUTER);
|
| 2692 |
|
|
|
| 2693 |
|
|
if (!is_onlink) { /* better router case. perform rtredirect. */
|
| 2694 |
|
|
/* perform rtredirect */
|
| 2695 |
|
|
struct sockaddr_in6 sdst;
|
| 2696 |
|
|
struct sockaddr_in6 sgw;
|
| 2697 |
|
|
struct sockaddr_in6 ssrc;
|
| 2698 |
|
|
#ifdef __bsdi__
|
| 2699 |
|
|
extern int icmp_redirtimeout; /* XXX */
|
| 2700 |
|
|
#endif
|
| 2701 |
|
|
#if defined(__NetBSD__) || defined(__OpenBSD__)
|
| 2702 |
|
|
unsigned long rtcount;
|
| 2703 |
|
|
struct rtentry *newrt = NULL;
|
| 2704 |
|
|
#endif
|
| 2705 |
|
|
|
| 2706 |
|
|
#if defined(__NetBSD__) || defined(__OpenBSD__)
|
| 2707 |
|
|
/*
|
| 2708 |
|
|
* do not install redirect route, if the number of entries
|
| 2709 |
|
|
* is too much (> hiwat). note that, the node (= host) will
|
| 2710 |
|
|
* work just fine even if we do not install redirect route
|
| 2711 |
|
|
* (there will be additional hops, though).
|
| 2712 |
|
|
*/
|
| 2713 |
|
|
rtcount = rt_timer_count(icmp6_redirect_timeout_q);
|
| 2714 |
|
|
if (0 <= icmp6_redirect_hiwat && rtcount > icmp6_redirect_hiwat)
|
| 2715 |
|
|
return;
|
| 2716 |
|
|
else if (0 <= icmp6_redirect_lowat &&
|
| 2717 |
|
|
rtcount > icmp6_redirect_lowat) {
|
| 2718 |
|
|
/*
|
| 2719 |
|
|
* XXX nuke a victim, install the new one.
|
| 2720 |
|
|
*/
|
| 2721 |
|
|
}
|
| 2722 |
|
|
#endif
|
| 2723 |
|
|
|
| 2724 |
|
|
bzero(&sdst, sizeof(sdst));
|
| 2725 |
|
|
bzero(&sgw, sizeof(sgw));
|
| 2726 |
|
|
bzero(&ssrc, sizeof(ssrc));
|
| 2727 |
|
|
sdst.sin6_family = sgw.sin6_family = ssrc.sin6_family = AF_INET6;
|
| 2728 |
|
|
sdst.sin6_len = sgw.sin6_len = ssrc.sin6_len =
|
| 2729 |
|
|
sizeof(struct sockaddr_in6);
|
| 2730 |
|
|
bcopy(&redtgt6, &sgw.sin6_addr, sizeof(struct in6_addr));
|
| 2731 |
|
|
bcopy(&reddst6, &sdst.sin6_addr, sizeof(struct in6_addr));
|
| 2732 |
|
|
bcopy(&src6, &ssrc.sin6_addr, sizeof(struct in6_addr));
|
| 2733 |
|
|
rtredirect((struct sockaddr *)&sdst, (struct sockaddr *)&sgw,
|
| 2734 |
|
|
(struct sockaddr *)NULL, RTF_GATEWAY | RTF_HOST,
|
| 2735 |
|
|
(struct sockaddr *)&ssrc,
|
| 2736 |
|
|
#ifdef __bsdi__
|
| 2737 |
|
|
icmp_redirtimeout
|
| 2738 |
|
|
#elif defined(__NetBSD__) || defined(__OpenBSD__)
|
| 2739 |
|
|
&newrt
|
| 2740 |
|
|
#else
|
| 2741 |
|
|
(struct rtentry **)NULL
|
| 2742 |
|
|
#endif
|
| 2743 |
|
|
);
|
| 2744 |
|
|
|
| 2745 |
|
|
#if defined(__NetBSD__) || defined(__OpenBSD__)
|
| 2746 |
|
|
if (newrt) {
|
| 2747 |
|
|
(void)rt_timer_add(newrt, icmp6_redirect_timeout,
|
| 2748 |
|
|
icmp6_redirect_timeout_q);
|
| 2749 |
|
|
rtfree(newrt);
|
| 2750 |
|
|
}
|
| 2751 |
|
|
#endif
|
| 2752 |
|
|
}
|
| 2753 |
|
|
/* finally update cached route in each socket via pfctlinput */
|
| 2754 |
|
|
{
|
| 2755 |
|
|
struct sockaddr_in6 sdst;
|
| 2756 |
|
|
|
| 2757 |
|
|
bzero(&sdst, sizeof(sdst));
|
| 2758 |
|
|
sdst.sin6_family = AF_INET6;
|
| 2759 |
|
|
sdst.sin6_len = sizeof(struct sockaddr_in6);
|
| 2760 |
|
|
bcopy(&reddst6, &sdst.sin6_addr, sizeof(struct in6_addr));
|
| 2761 |
|
|
pfctlinput(PRC_REDIRECT_HOST, (struct sockaddr *)&sdst);
|
| 2762 |
|
|
#ifdef IPSEC
|
| 2763 |
|
|
key_sa_routechange((struct sockaddr *)&sdst);
|
| 2764 |
|
|
#endif
|
| 2765 |
|
|
}
|
| 2766 |
|
|
|
| 2767 |
|
|
freeit:
|
| 2768 |
|
|
m_freem(m);
|
| 2769 |
|
|
return;
|
| 2770 |
|
|
|
| 2771 |
|
|
bad:
|
| 2772 |
|
|
icmp6stat.icp6s_badredirect++;
|
| 2773 |
|
|
m_freem(m);
|
| 2774 |
|
|
}
|
| 2775 |
|
|
|
| 2776 |
|
|
void
|
| 2777 |
|
|
icmp6_redirect_output(m0, rt)
|
| 2778 |
|
|
struct mbuf *m0;
|
| 2779 |
|
|
struct rtentry *rt;
|
| 2780 |
|
|
{
|
| 2781 |
|
|
struct ifnet *ifp; /* my outgoing interface */
|
| 2782 |
|
|
struct in6_addr *ifp_ll6;
|
| 2783 |
|
|
struct in6_addr *router_ll6;
|
| 2784 |
|
|
struct ip6_hdr *sip6; /* m0 as struct ip6_hdr */
|
| 2785 |
|
|
struct mbuf *m = NULL; /* newly allocated one */
|
| 2786 |
|
|
struct ip6_hdr *ip6; /* m as struct ip6_hdr */
|
| 2787 |
|
|
struct nd_redirect *nd_rd;
|
| 2788 |
|
|
size_t maxlen;
|
| 2789 |
|
|
u_char *p;
|
| 2790 |
|
|
struct sockaddr_in6 src_sa;
|
| 2791 |
|
|
int64_t zoneid;
|
| 2792 |
|
|
|
| 2793 |
|
|
icmp6_errcount(&icmp6stat.icp6s_outerrhist, ND_REDIRECT, 0);
|
| 2794 |
|
|
|
| 2795 |
|
|
/* if we are not router, we don't send icmp6 redirect */
|
| 2796 |
|
|
if (!ip6_forwarding || ip6_accept_rtadv)
|
| 2797 |
|
|
goto fail;
|
| 2798 |
|
|
|
| 2799 |
|
|
/* sanity check */
|
| 2800 |
|
|
if (!m0 || !rt || !(rt->rt_flags & RTF_UP) || !(ifp = rt->rt_ifp))
|
| 2801 |
|
|
goto fail;
|
| 2802 |
|
|
|
| 2803 |
|
|
/*
|
| 2804 |
|
|
* Address check:
|
| 2805 |
|
|
* the source address must identify a neighbor, and
|
| 2806 |
|
|
* the destination address must not be a multicast address
|
| 2807 |
|
|
* [RFC 2461, sec 8.2]
|
| 2808 |
|
|
*/
|
| 2809 |
|
|
sip6 = mtod(m0, struct ip6_hdr *);
|
| 2810 |
|
|
bzero(&src_sa, sizeof(src_sa));
|
| 2811 |
|
|
src_sa.sin6_family = AF_INET6;
|
| 2812 |
|
|
src_sa.sin6_len = sizeof(src_sa);
|
| 2813 |
|
|
src_sa.sin6_addr = sip6->ip6_src;
|
| 2814 |
|
|
/* we don't currently use sin6_scope_id, but eventually use it */
|
| 2815 |
|
|
if ((zoneid = in6_addr2zoneid(ifp, &sip6->ip6_src)) < 0)
|
| 2816 |
|
|
goto fail;
|
| 2817 |
|
|
src_sa.sin6_scope_id = zoneid;
|
| 2818 |
|
|
if (nd6_is_addr_neighbor(&src_sa, ifp) == 0)
|
| 2819 |
|
|
goto fail;
|
| 2820 |
|
|
if (IN6_IS_ADDR_MULTICAST(&sip6->ip6_dst))
|
| 2821 |
|
|
goto fail; /* what should we do here? */
|
| 2822 |
|
|
|
| 2823 |
|
|
/* rate limit */
|
| 2824 |
|
|
if (icmp6_ratelimit(&sip6->ip6_src, ND_REDIRECT, 0))
|
| 2825 |
|
|
goto fail;
|
| 2826 |
|
|
|
| 2827 |
|
|
/*
|
| 2828 |
|
|
* Since we are going to append up to 1280 bytes (= IPV6_MMTU),
|
| 2829 |
|
|
* we almost always ask for an mbuf cluster for simplicity.
|
| 2830 |
|
|
* (MHLEN < IPV6_MMTU is almost always true)
|
| 2831 |
|
|
*/
|
| 2832 |
|
|
#if IPV6_MMTU >= MCLBYTES
|
| 2833 |
|
|
# error assumption failed about IPV6_MMTU and MCLBYTES
|
| 2834 |
|
|
#endif
|
| 2835 |
|
|
MGETHDR(m, M_DONTWAIT, MT_HEADER);
|
| 2836 |
|
|
if (m && IPV6_MMTU >= MHLEN)
|
| 2837 |
|
|
MCLGET(m, M_DONTWAIT);
|
| 2838 |
|
|
if (!m)
|
| 2839 |
|
|
goto fail;
|
| 2840 |
|
|
m->m_pkthdr.rcvif = NULL;
|
| 2841 |
|
|
m->m_len = 0;
|
| 2842 |
|
|
maxlen = M_TRAILINGSPACE(m);
|
| 2843 |
|
|
maxlen = min(IPV6_MMTU, maxlen);
|
| 2844 |
|
|
/* just for safety */
|
| 2845 |
|
|
if (maxlen < sizeof(struct ip6_hdr) + sizeof(struct icmp6_hdr) +
|
| 2846 |
|
|
((sizeof(struct nd_opt_hdr) + ifp->if_addrlen + 7) & ~7)) {
|
| 2847 |
|
|
goto fail;
|
| 2848 |
|
|
}
|
| 2849 |
|
|
|
| 2850 |
|
|
{
|
| 2851 |
|
|
/* get ip6 linklocal address for ifp(my outgoing interface). */
|
| 2852 |
|
|
struct in6_ifaddr *ia;
|
| 2853 |
|
|
if ((ia = in6ifa_ifpforlinklocal(ifp,
|
| 2854 |
|
|
IN6_IFF_NOTREADY|
|
| 2855 |
|
|
IN6_IFF_ANYCAST)) == NULL)
|
| 2856 |
|
|
goto fail;
|
| 2857 |
|
|
ifp_ll6 = &ia->ia_addr.sin6_addr;
|
| 2858 |
|
|
}
|
| 2859 |
|
|
|
| 2860 |
|
|
/* get ip6 linklocal address for the router. */
|
| 2861 |
|
|
if (rt->rt_gateway && (rt->rt_flags & RTF_GATEWAY)) {
|
| 2862 |
|
|
struct sockaddr_in6 *sin6;
|
| 2863 |
|
|
sin6 = (struct sockaddr_in6 *)rt->rt_gateway;
|
| 2864 |
|
|
router_ll6 = &sin6->sin6_addr;
|
| 2865 |
|
|
if (!IN6_IS_ADDR_LINKLOCAL(router_ll6))
|
| 2866 |
|
|
router_ll6 = (struct in6_addr *)NULL;
|
| 2867 |
|
|
} else
|
| 2868 |
|
|
router_ll6 = (struct in6_addr *)NULL;
|
| 2869 |
|
|
|
| 2870 |
|
|
/* ip6 */
|
| 2871 |
|
|
ip6 = mtod(m, struct ip6_hdr *);
|
| 2872 |
|
|
ip6->ip6_flow = 0;
|
| 2873 |
|
|
ip6->ip6_vfc &= ~IPV6_VERSION_MASK;
|
| 2874 |
|
|
ip6->ip6_vfc |= IPV6_VERSION;
|
| 2875 |
|
|
/* ip6->ip6_plen will be set later */
|
| 2876 |
|
|
ip6->ip6_nxt = IPPROTO_ICMPV6;
|
| 2877 |
|
|
ip6->ip6_hlim = 255;
|
| 2878 |
|
|
/* ip6->ip6_src must be linklocal addr for my outgoing if. */
|
| 2879 |
|
|
bcopy(ifp_ll6, &ip6->ip6_src, sizeof(struct in6_addr));
|
| 2880 |
|
|
bcopy(&sip6->ip6_src, &ip6->ip6_dst, sizeof(struct in6_addr));
|
| 2881 |
|
|
|
| 2882 |
|
|
/* ND Redirect */
|
| 2883 |
|
|
nd_rd = (struct nd_redirect *)(ip6 + 1);
|
| 2884 |
|
|
nd_rd->nd_rd_type = ND_REDIRECT;
|
| 2885 |
|
|
nd_rd->nd_rd_code = 0;
|
| 2886 |
|
|
nd_rd->nd_rd_reserved = 0;
|
| 2887 |
|
|
if (rt->rt_flags & RTF_GATEWAY) {
|
| 2888 |
|
|
/*
|
| 2889 |
|
|
* nd_rd->nd_rd_target must be a link-local address in
|
| 2890 |
|
|
* better router cases.
|
| 2891 |
|
|
*/
|
| 2892 |
|
|
if (!router_ll6)
|
| 2893 |
|
|
goto fail;
|
| 2894 |
|
|
bcopy(router_ll6, &nd_rd->nd_rd_target,
|
| 2895 |
|
|
sizeof(nd_rd->nd_rd_target));
|
| 2896 |
|
|
bcopy(&sip6->ip6_dst, &nd_rd->nd_rd_dst,
|
| 2897 |
|
|
sizeof(nd_rd->nd_rd_dst));
|
| 2898 |
|
|
} else {
|
| 2899 |
|
|
/* make sure redtgt == reddst */
|
| 2900 |
|
|
bcopy(&sip6->ip6_dst, &nd_rd->nd_rd_target,
|
| 2901 |
|
|
sizeof(nd_rd->nd_rd_target));
|
| 2902 |
|
|
bcopy(&sip6->ip6_dst, &nd_rd->nd_rd_dst,
|
| 2903 |
|
|
sizeof(nd_rd->nd_rd_dst));
|
| 2904 |
|
|
}
|
| 2905 |
|
|
|
| 2906 |
|
|
p = (u_char *)(nd_rd + 1);
|
| 2907 |
|
|
|
| 2908 |
|
|
if (!router_ll6)
|
| 2909 |
|
|
goto nolladdropt;
|
| 2910 |
|
|
|
| 2911 |
|
|
{
|
| 2912 |
|
|
/* target lladdr option */
|
| 2913 |
|
|
struct rtentry *rt_router = NULL;
|
| 2914 |
|
|
int len;
|
| 2915 |
|
|
struct sockaddr_dl *sdl;
|
| 2916 |
|
|
struct nd_opt_hdr *nd_opt;
|
| 2917 |
|
|
char *lladdr;
|
| 2918 |
|
|
|
| 2919 |
|
|
rt_router = nd6_lookup(router_ll6, 0, ifp);
|
| 2920 |
|
|
if (!rt_router)
|
| 2921 |
|
|
goto nolladdropt;
|
| 2922 |
|
|
len = sizeof(*nd_opt) + ifp->if_addrlen;
|
| 2923 |
|
|
len = (len + 7) & ~7; /* round by 8 */
|
| 2924 |
|
|
/* safety check */
|
| 2925 |
|
|
if (len + (p - (u_char *)ip6) > maxlen)
|
| 2926 |
|
|
goto nolladdropt;
|
| 2927 |
|
|
if (!(rt_router->rt_flags & RTF_GATEWAY) &&
|
| 2928 |
|
|
(rt_router->rt_flags & RTF_LLINFO) &&
|
| 2929 |
|
|
(rt_router->rt_gateway->sa_family == AF_LINK) &&
|
| 2930 |
|
|
(sdl = (struct sockaddr_dl *)rt_router->rt_gateway) &&
|
| 2931 |
|
|
sdl->sdl_alen) {
|
| 2932 |
|
|
nd_opt = (struct nd_opt_hdr *)p;
|
| 2933 |
|
|
nd_opt->nd_opt_type = ND_OPT_TARGET_LINKADDR;
|
| 2934 |
|
|
nd_opt->nd_opt_len = len >> 3;
|
| 2935 |
|
|
lladdr = (char *)(nd_opt + 1);
|
| 2936 |
|
|
bcopy(LLADDR(sdl), lladdr, ifp->if_addrlen);
|
| 2937 |
|
|
p += len;
|
| 2938 |
|
|
}
|
| 2939 |
|
|
}
|
| 2940 |
|
|
nolladdropt:;
|
| 2941 |
|
|
|
| 2942 |
|
|
m->m_pkthdr.len = m->m_len = p - (u_char *)ip6;
|
| 2943 |
|
|
|
| 2944 |
|
|
/* just to be safe */
|
| 2945 |
|
|
#ifdef M_DECRYPTED /* not openbsd */
|
| 2946 |
|
|
if (m0->m_flags & M_DECRYPTED)
|
| 2947 |
|
|
goto noredhdropt;
|
| 2948 |
|
|
#endif
|
| 2949 |
|
|
if (p - (u_char *)ip6 > maxlen)
|
| 2950 |
|
|
goto noredhdropt;
|
| 2951 |
|
|
|
| 2952 |
|
|
{
|
| 2953 |
|
|
/* redirected header option */
|
| 2954 |
|
|
int len;
|
| 2955 |
|
|
struct nd_opt_rd_hdr *nd_opt_rh;
|
| 2956 |
|
|
|
| 2957 |
|
|
/*
|
| 2958 |
|
|
* compute the maximum size for icmp6 redirect header option.
|
| 2959 |
|
|
* XXX room for auth header?
|
| 2960 |
|
|
*/
|
| 2961 |
|
|
len = maxlen - (p - (u_char *)ip6);
|
| 2962 |
|
|
len &= ~7;
|
| 2963 |
|
|
|
| 2964 |
|
|
/* This is just for simplicity. */
|
| 2965 |
|
|
if (m0->m_pkthdr.len != m0->m_len) {
|
| 2966 |
|
|
if (m0->m_next) {
|
| 2967 |
|
|
m_freem(m0->m_next);
|
| 2968 |
|
|
m0->m_next = NULL;
|
| 2969 |
|
|
}
|
| 2970 |
|
|
m0->m_pkthdr.len = m0->m_len;
|
| 2971 |
|
|
}
|
| 2972 |
|
|
|
| 2973 |
|
|
/*
|
| 2974 |
|
|
* Redirected header option spec (RFC2461 4.6.3) talks nothing
|
| 2975 |
|
|
* about padding/truncate rule for the original IP packet.
|
| 2976 |
|
|
* From the discussion on IPv6imp in Feb 1999, the consensus was:
|
| 2977 |
|
|
* - "attach as much as possible" is the goal
|
| 2978 |
|
|
* - pad if not aligned (original size can be guessed by original
|
| 2979 |
|
|
* ip6 header)
|
| 2980 |
|
|
* Following code adds the padding if it is simple enough,
|
| 2981 |
|
|
* and truncates if not.
|
| 2982 |
|
|
*/
|
| 2983 |
|
|
if (m0->m_next || m0->m_pkthdr.len != m0->m_len)
|
| 2984 |
|
|
panic("assumption failed in %s:%d\n", __FILE__, __LINE__);
|
| 2985 |
|
|
|
| 2986 |
|
|
if (len - sizeof(*nd_opt_rh) < m0->m_pkthdr.len) {
|
| 2987 |
|
|
/* not enough room, truncate */
|
| 2988 |
|
|
m0->m_pkthdr.len = m0->m_len = len - sizeof(*nd_opt_rh);
|
| 2989 |
|
|
} else {
|
| 2990 |
|
|
/* enough room, pad or truncate */
|
| 2991 |
|
|
size_t extra;
|
| 2992 |
|
|
|
| 2993 |
|
|
extra = m0->m_pkthdr.len % 8;
|
| 2994 |
|
|
if (extra) {
|
| 2995 |
|
|
/* pad if easy enough, truncate if not */
|
| 2996 |
|
|
if (8 - extra <= M_TRAILINGSPACE(m0)) {
|
| 2997 |
|
|
/* pad */
|
| 2998 |
|
|
m0->m_len += (8 - extra);
|
| 2999 |
|
|
m0->m_pkthdr.len += (8 - extra);
|
| 3000 |
|
|
} else {
|
| 3001 |
|
|
/* truncate */
|
| 3002 |
|
|
m0->m_pkthdr.len -= extra;
|
| 3003 |
|
|
m0->m_len -= extra;
|
| 3004 |
|
|
}
|
| 3005 |
|
|
}
|
| 3006 |
|
|
len = m0->m_pkthdr.len + sizeof(*nd_opt_rh);
|
| 3007 |
|
|
m0->m_pkthdr.len = m0->m_len = len - sizeof(*nd_opt_rh);
|
| 3008 |
|
|
}
|
| 3009 |
|
|
|
| 3010 |
|
|
nd_opt_rh = (struct nd_opt_rd_hdr *)p;
|
| 3011 |
|
|
bzero(nd_opt_rh, sizeof(*nd_opt_rh));
|
| 3012 |
|
|
nd_opt_rh->nd_opt_rh_type = ND_OPT_REDIRECTED_HEADER;
|
| 3013 |
|
|
nd_opt_rh->nd_opt_rh_len = len >> 3;
|
| 3014 |
|
|
p += sizeof(*nd_opt_rh);
|
| 3015 |
|
|
m->m_pkthdr.len = m->m_len = p - (u_char *)ip6;
|
| 3016 |
|
|
|
| 3017 |
|
|
/* connect m0 to m */
|
| 3018 |
|
|
m->m_next = m0;
|
| 3019 |
|
|
m->m_pkthdr.len = m->m_len + m0->m_len;
|
| 3020 |
|
|
}
|
| 3021 |
|
|
noredhdropt:;
|
| 3022 |
|
|
|
| 3023 |
|
|
if (IN6_IS_ADDR_LINKLOCAL(&sip6->ip6_src))
|
| 3024 |
|
|
sip6->ip6_src.s6_addr16[1] = 0;
|
| 3025 |
|
|
if (IN6_IS_ADDR_LINKLOCAL(&sip6->ip6_dst))
|
| 3026 |
|
|
sip6->ip6_dst.s6_addr16[1] = 0;
|
| 3027 |
|
|
#if 0
|
| 3028 |
|
|
if (IN6_IS_ADDR_LINKLOCAL(&ip6->ip6_src))
|
| 3029 |
|
|
ip6->ip6_src.s6_addr16[1] = 0;
|
| 3030 |
|
|
if (IN6_IS_ADDR_LINKLOCAL(&ip6->ip6_dst))
|
| 3031 |
|
|
ip6->ip6_dst.s6_addr16[1] = 0;
|
| 3032 |
|
|
#endif
|
| 3033 |
|
|
if (IN6_IS_ADDR_LINKLOCAL(&nd_rd->nd_rd_target))
|
| 3034 |
|
|
nd_rd->nd_rd_target.s6_addr16[1] = 0;
|
| 3035 |
|
|
if (IN6_IS_ADDR_LINKLOCAL(&nd_rd->nd_rd_dst))
|
| 3036 |
|
|
nd_rd->nd_rd_dst.s6_addr16[1] = 0;
|
| 3037 |
|
|
|
| 3038 |
|
|
ip6->ip6_plen = htons(m->m_pkthdr.len - sizeof(struct ip6_hdr));
|
| 3039 |
|
|
|
| 3040 |
|
|
nd_rd->nd_rd_cksum = 0;
|
| 3041 |
|
|
nd_rd->nd_rd_cksum
|
| 3042 |
|
|
= in6_cksum(m, IPPROTO_ICMPV6, sizeof(*ip6), ntohs(ip6->ip6_plen));
|
| 3043 |
|
|
|
| 3044 |
|
|
/* send the packet to outside... */
|
| 3045 |
|
|
#ifdef IPSEC
|
| 3046 |
|
|
/* Don't lookup socket */
|
| 3047 |
|
|
(void)ipsec_setsocket(m, NULL);
|
| 3048 |
|
|
#endif /* IPSEC */
|
| 3049 |
|
|
if (ip6_output(m, NULL, NULL, 0, NULL, NULL) != 0)
|
| 3050 |
|
|
icmp6_ifstat_inc(ifp, ifs6_out_error);
|
| 3051 |
|
|
|
| 3052 |
|
|
icmp6_ifstat_inc(ifp, ifs6_out_msg);
|
| 3053 |
|
|
icmp6_ifstat_inc(ifp, ifs6_out_redirect);
|
| 3054 |
|
|
icmp6stat.icp6s_outhist[ND_REDIRECT]++;
|
| 3055 |
|
|
|
| 3056 |
|
|
return;
|
| 3057 |
|
|
|
| 3058 |
|
|
fail:
|
| 3059 |
|
|
if (m)
|
| 3060 |
|
|
m_freem(m);
|
| 3061 |
|
|
if (m0)
|
| 3062 |
|
|
m_freem(m0);
|
| 3063 |
|
|
}
|
| 3064 |
|
|
|
| 3065 |
|
|
#ifdef HAVE_NRL_INPCB
|
| 3066 |
|
|
#define sotoin6pcb sotoinpcb
|
| 3067 |
|
|
#define in6pcb inpcb
|
| 3068 |
|
|
#define in6p_icmp6filt inp_icmp6filt
|
| 3069 |
|
|
#endif
|
| 3070 |
|
|
/*
|
| 3071 |
|
|
* ICMPv6 socket option processing.
|
| 3072 |
|
|
*/
|
| 3073 |
|
|
int
|
| 3074 |
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
|
| 3075 |
|
|
icmp6_ctloutput(so, sopt)
|
| 3076 |
|
|
struct socket *so;
|
| 3077 |
|
|
struct sockopt *sopt;
|
| 3078 |
|
|
#else
|
| 3079 |
|
|
icmp6_ctloutput(op, so, level, optname, mp)
|
| 3080 |
|
|
int op;
|
| 3081 |
|
|
struct socket *so;
|
| 3082 |
|
|
int level, optname;
|
| 3083 |
|
|
struct mbuf **mp;
|
| 3084 |
|
|
#endif
|
| 3085 |
|
|
{
|
| 3086 |
|
|
int error = 0;
|
| 3087 |
|
|
int optlen;
|
| 3088 |
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
|
| 3089 |
|
|
struct inpcb *inp = sotoinpcb(so);
|
| 3090 |
|
|
int level, op, optname;
|
| 3091 |
|
|
|
| 3092 |
|
|
if (sopt) {
|
| 3093 |
|
|
level = sopt->sopt_level;
|
| 3094 |
|
|
op = sopt->sopt_dir;
|
| 3095 |
|
|
optname = sopt->sopt_name;
|
| 3096 |
|
|
optlen = sopt->sopt_valsize;
|
| 3097 |
|
|
} else
|
| 3098 |
|
|
level = op = optname = optlen = 0;
|
| 3099 |
|
|
#else
|
| 3100 |
|
|
struct in6pcb *in6p = sotoin6pcb(so);
|
| 3101 |
|
|
struct mbuf *m = *mp;
|
| 3102 |
|
|
|
| 3103 |
|
|
optlen = m ? m->m_len : 0;
|
| 3104 |
|
|
#endif
|
| 3105 |
|
|
|
| 3106 |
|
|
if (level != IPPROTO_ICMPV6) {
|
| 3107 |
|
|
#if !(defined(__FreeBSD__) && __FreeBSD__ >= 3)
|
| 3108 |
|
|
if (op == PRCO_SETOPT && m)
|
| 3109 |
|
|
(void)m_free(m);
|
| 3110 |
|
|
#endif
|
| 3111 |
|
|
return EINVAL;
|
| 3112 |
|
|
}
|
| 3113 |
|
|
|
| 3114 |
|
|
switch (op) {
|
| 3115 |
|
|
case PRCO_SETOPT:
|
| 3116 |
|
|
switch (optname) {
|
| 3117 |
|
|
case ICMP6_FILTER:
|
| 3118 |
|
|
{
|
| 3119 |
|
|
struct icmp6_filter *p;
|
| 3120 |
|
|
|
| 3121 |
|
|
if (optlen != sizeof(*p)) {
|
| 3122 |
|
|
error = EMSGSIZE;
|
| 3123 |
|
|
break;
|
| 3124 |
|
|
}
|
| 3125 |
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
|
| 3126 |
|
|
if (inp->in6p_icmp6filt == NULL) {
|
| 3127 |
|
|
error = EINVAL;
|
| 3128 |
|
|
break;
|
| 3129 |
|
|
}
|
| 3130 |
|
|
error = sooptcopyin(sopt, inp->in6p_icmp6filt, optlen,
|
| 3131 |
|
|
optlen);
|
| 3132 |
|
|
#else
|
| 3133 |
|
|
p = mtod(m, struct icmp6_filter *);
|
| 3134 |
|
|
if (!p || !in6p->in6p_icmp6filt) {
|
| 3135 |
|
|
error = EINVAL;
|
| 3136 |
|
|
break;
|
| 3137 |
|
|
}
|
| 3138 |
|
|
bcopy(p, in6p->in6p_icmp6filt,
|
| 3139 |
|
|
sizeof(struct icmp6_filter));
|
| 3140 |
|
|
error = 0;
|
| 3141 |
|
|
#endif
|
| 3142 |
|
|
break;
|
| 3143 |
|
|
}
|
| 3144 |
|
|
|
| 3145 |
|
|
default:
|
| 3146 |
|
|
error = ENOPROTOOPT;
|
| 3147 |
|
|
break;
|
| 3148 |
|
|
}
|
| 3149 |
|
|
#if !(defined(__FreeBSD__) && __FreeBSD__ >= 3)
|
| 3150 |
|
|
if (m)
|
| 3151 |
|
|
(void)m_freem(m);
|
| 3152 |
|
|
#endif
|
| 3153 |
|
|
break;
|
| 3154 |
|
|
|
| 3155 |
|
|
case PRCO_GETOPT:
|
| 3156 |
|
|
switch (optname) {
|
| 3157 |
|
|
case ICMP6_FILTER:
|
| 3158 |
|
|
{
|
| 3159 |
|
|
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
|
| 3160 |
|
|
if (inp->in6p_icmp6filt == NULL) {
|
| 3161 |
|
|
error = EINVAL;
|
| 3162 |
|
|
break;
|
| 3163 |
|
|
}
|
| 3164 |
|
|
error = sooptcopyout(sopt, inp->in6p_icmp6filt,
|
| 3165 |
|
|
sizeof(struct icmp6_filter));
|
| 3166 |
|
|
#else
|
| 3167 |
|
|
struct icmp6_filter *p;
|
| 3168 |
|
|
|
| 3169 |
|
|
if (!in6p->in6p_icmp6filt) {
|
| 3170 |
|
|
error = EINVAL;
|
| 3171 |
|
|
break;
|
| 3172 |
|
|
}
|
| 3173 |
|
|
*mp = m = m_get(M_WAIT, MT_SOOPTS);
|
| 3174 |
|
|
m->m_len = sizeof(struct icmp6_filter);
|
| 3175 |
|
|
p = mtod(m, struct icmp6_filter *);
|
| 3176 |
|
|
bcopy(in6p->in6p_icmp6filt, p,
|
| 3177 |
|
|
sizeof(struct icmp6_filter));
|
| 3178 |
|
|
error = 0;
|
| 3179 |
|
|
#endif
|
| 3180 |
|
|
break;
|
| 3181 |
|
|
}
|
| 3182 |
|
|
|
| 3183 |
|
|
default:
|
| 3184 |
|
|
error = ENOPROTOOPT;
|
| 3185 |
|
|
break;
|
| 3186 |
|
|
}
|
| 3187 |
|
|
break;
|
| 3188 |
|
|
}
|
| 3189 |
|
|
|
| 3190 |
|
|
return(error);
|
| 3191 |
|
|
}
|
| 3192 |
|
|
#ifdef HAVE_NRL_INPCB
|
| 3193 |
|
|
#undef sotoin6pcb
|
| 3194 |
|
|
#undef in6pcb
|
| 3195 |
|
|
#undef in6p_icmp6filt
|
| 3196 |
|
|
#endif
|
| 3197 |
|
|
|
| 3198 |
|
|
#ifndef HAVE_PPSRATECHECK
|
| 3199 |
|
|
#ifndef timersub
|
| 3200 |
|
|
#define timersub(tvp, uvp, vvp) \
|
| 3201 |
|
|
do { \
|
| 3202 |
|
|
(vvp)->tv_sec = (tvp)->tv_sec - (uvp)->tv_sec; \
|
| 3203 |
|
|
(vvp)->tv_usec = (tvp)->tv_usec - (uvp)->tv_usec; \
|
| 3204 |
|
|
if ((vvp)->tv_usec < 0) { \
|
| 3205 |
|
|
(vvp)->tv_sec--; \
|
| 3206 |
|
|
(vvp)->tv_usec += 1000000; \
|
| 3207 |
|
|
} \
|
| 3208 |
|
|
} while (0)
|
| 3209 |
|
|
#endif
|
| 3210 |
|
|
|
| 3211 |
|
|
/*
|
| 3212 |
|
|
* ppsratecheck(): packets (or events) per second limitation.
|
| 3213 |
|
|
*/
|
| 3214 |
|
|
static int
|
| 3215 |
|
|
ppsratecheck(lasttime, curpps, maxpps)
|
| 3216 |
|
|
struct timeval *lasttime;
|
| 3217 |
|
|
int *curpps;
|
| 3218 |
|
|
int maxpps; /* maximum pps allowed */
|
| 3219 |
|
|
{
|
| 3220 |
|
|
struct timeval tv, delta;
|
| 3221 |
|
|
int s, rv;
|
| 3222 |
|
|
|
| 3223 |
|
|
s = splclock();
|
| 3224 |
|
|
#ifndef __FreeBSD__
|
| 3225 |
|
|
tv = mono_time;
|
| 3226 |
|
|
#else
|
| 3227 |
|
|
microtime(&tv);
|
| 3228 |
|
|
#endif
|
| 3229 |
|
|
splx(s);
|
| 3230 |
|
|
|
| 3231 |
|
|
timersub(&tv, lasttime, &delta);
|
| 3232 |
|
|
|
| 3233 |
|
|
/*
|
| 3234 |
|
|
* Check for 0,0 so that the message will be seen at least once.
|
| 3235 |
|
|
* If more than one second has passed since the last update of
|
| 3236 |
|
|
* lasttime, reset the counter.
|
| 3237 |
|
|
*
|
| 3238 |
|
|
* We do increment *curpps even in *curpps < maxpps case, as some may
|
| 3239 |
|
|
* try to use *curpps for stat purposes as well.
|
| 3240 |
|
|
*/
|
| 3241 |
|
|
if ((lasttime->tv_sec == 0 && lasttime->tv_usec == 0) ||
|
| 3242 |
|
|
delta.tv_sec >= 1) {
|
| 3243 |
|
|
*lasttime = tv;
|
| 3244 |
|
|
*curpps = 0;
|
| 3245 |
|
|
rv = 1;
|
| 3246 |
|
|
} else if (maxpps < 0)
|
| 3247 |
|
|
rv = 1;
|
| 3248 |
|
|
else if (*curpps < maxpps)
|
| 3249 |
|
|
rv = 1;
|
| 3250 |
|
|
else
|
| 3251 |
|
|
rv = 0;
|
| 3252 |
|
|
|
| 3253 |
|
|
#if 1 /* DIAGNOSTIC? */
|
| 3254 |
|
|
/* be careful about wrap-around */
|
| 3255 |
|
|
if (*curpps + 1 > *curpps)
|
| 3256 |
|
|
*curpps = *curpps + 1;
|
| 3257 |
|
|
#else
|
| 3258 |
|
|
/*
|
| 3259 |
|
|
* assume that there's not too many calls to this function.
|
| 3260 |
|
|
* not sure if the assumption holds, as it depends on *caller's*
|
| 3261 |
|
|
* behavior, not the behavior of this function.
|
| 3262 |
|
|
* IMHO it is wrong to make assumption on the caller's behavior,
|
| 3263 |
|
|
* so the above #if is #if 1, not #ifdef DIAGNOSTIC.
|
| 3264 |
|
|
*/
|
| 3265 |
|
|
*curpps = *curpps + 1;
|
| 3266 |
|
|
#endif
|
| 3267 |
|
|
|
| 3268 |
|
|
return (rv);
|
| 3269 |
|
|
}
|
| 3270 |
|
|
#endif
|
| 3271 |
|
|
|
| 3272 |
|
|
/*
|
| 3273 |
|
|
* Perform rate limit check.
|
| 3274 |
|
|
* Returns 0 if it is okay to send the icmp6 packet.
|
| 3275 |
|
|
* Returns 1 if the router SHOULD NOT send this icmp6 packet due to rate
|
| 3276 |
|
|
* limitation.
|
| 3277 |
|
|
*
|
| 3278 |
|
|
* XXX per-destination/type check necessary?
|
| 3279 |
|
|
*/
|
| 3280 |
|
|
static int
|
| 3281 |
|
|
icmp6_ratelimit(dst, type, code)
|
| 3282 |
|
|
const struct in6_addr *dst; /* not used at this moment */
|
| 3283 |
|
|
const int type; /* not used at this moment */
|
| 3284 |
|
|
const int code; /* not used at this moment */
|
| 3285 |
|
|
{
|
| 3286 |
|
|
int ret;
|
| 3287 |
|
|
|
| 3288 |
|
|
ret = 0; /* okay to send */
|
| 3289 |
|
|
|
| 3290 |
|
|
/* PPS limit */
|
| 3291 |
|
|
if (!ppsratecheck(&icmp6errppslim_last, &icmp6errpps_count,
|
| 3292 |
|
|
icmp6errppslim)) {
|
| 3293 |
|
|
/* The packet is subject to rate limit */
|
| 3294 |
|
|
ret++;
|
| 3295 |
|
|
}
|
| 3296 |
|
|
|
| 3297 |
|
|
return ret;
|
| 3298 |
|
|
}
|
| 3299 |
|
|
|
| 3300 |
|
|
/*
|
| 3301 |
|
|
* Swap ip6_src and the address in the homeaddress destination option.
|
| 3302 |
|
|
* Since the dest6 processing routine swaps ip6_src and homeaddr (if
|
| 3303 |
|
|
* any), we must swap them again when we send back the ip datagram to
|
| 3304 |
|
|
* the sender (ex. icmp6_error).
|
| 3305 |
|
|
*
|
| 3306 |
|
|
* returns 0 if succeeded.
|
| 3307 |
|
|
*/
|
| 3308 |
|
|
static int
|
| 3309 |
|
|
icmp6_recover_src(m)
|
| 3310 |
|
|
struct mbuf *m; /* original ip6 packet */
|
| 3311 |
|
|
{
|
| 3312 |
|
|
int off, nxt, finished = 0;
|
| 3313 |
|
|
struct ip6_hdr *oip6;
|
| 3314 |
|
|
struct ip6_ext *exts;
|
| 3315 |
|
|
struct ip6_dest *dstopts;
|
| 3316 |
|
|
int dstoptlen;
|
| 3317 |
|
|
u_int8_t *opt;
|
| 3318 |
|
|
int optlen;
|
| 3319 |
|
|
struct ip6_opt_home_address *haopt;
|
| 3320 |
|
|
struct in6_addr t;
|
| 3321 |
|
|
int error = 0;
|
| 3322 |
|
|
|
| 3323 |
|
|
#ifndef PULLDOWN_TEST
|
| 3324 |
|
|
IP6_EXTHDR_CHECK(m, 0, sizeof(struct ip6_hdr), ENOBUFS);
|
| 3325 |
|
|
oip6 = mtod(m, struct ip6_hdr *);
|
| 3326 |
|
|
#else
|
| 3327 |
|
|
IP6_EXTHDR_GET(oip6, struct ip6_hdr *, m, 0, sizeof(*oip6));
|
| 3328 |
|
|
if (oip6 == NULL) {
|
| 3329 |
|
|
error = ENOBUFS;
|
| 3330 |
|
|
goto bad;
|
| 3331 |
|
|
}
|
| 3332 |
|
|
#endif
|
| 3333 |
|
|
|
| 3334 |
|
|
off = sizeof(struct ip6_hdr);
|
| 3335 |
|
|
nxt = oip6->ip6_nxt;
|
| 3336 |
|
|
while (off + 2 < m->m_pkthdr.len) {
|
| 3337 |
|
|
switch (nxt) {
|
| 3338 |
|
|
case IPPROTO_DSTOPTS:
|
| 3339 |
|
|
#ifndef PULLDOWN_TEST
|
| 3340 |
|
|
IP6_EXTHDR_CHECK(m, off, sizeof(struct ip6_dest),
|
| 3341 |
|
|
ENOBUFS);
|
| 3342 |
|
|
dstopts = (struct ip6_dest *)(mtod(m, caddr_t) + off);
|
| 3343 |
|
|
#else
|
| 3344 |
|
|
IP6_EXTHDR_GET(dstopts, struct ip6_dest *,
|
| 3345 |
|
|
m, off, sizeof(*dstopts));
|
| 3346 |
|
|
if (dstopts == NULL) {
|
| 3347 |
|
|
error = ENOBUFS;
|
| 3348 |
|
|
goto bad;
|
| 3349 |
|
|
}
|
| 3350 |
|
|
#endif
|
| 3351 |
|
|
|
| 3352 |
|
|
dstoptlen = (dstopts->ip6d_len + 1) << 3;
|
| 3353 |
|
|
#ifndef PULLDOWN_TEST
|
| 3354 |
|
|
IP6_EXTHDR_CHECK(m, off, dstoptlen, ENOBUFS);
|
| 3355 |
|
|
dstopts = (struct ip6_dest *)(mtod(m, caddr_t) + off);
|
| 3356 |
|
|
#else
|
| 3357 |
|
|
IP6_EXTHDR_GET(dstopts, struct ip6_dest *,
|
| 3358 |
|
|
m, off, dstoptlen);
|
| 3359 |
|
|
if (dstopts == NULL) {
|
| 3360 |
|
|
error = ENOBUFS;
|
| 3361 |
|
|
goto bad;
|
| 3362 |
|
|
}
|
| 3363 |
|
|
#endif
|
| 3364 |
|
|
off += dstoptlen;
|
| 3365 |
|
|
nxt = dstopts->ip6d_nxt;
|
| 3366 |
|
|
|
| 3367 |
|
|
/* find homeaddress dstopt */
|
| 3368 |
|
|
dstoptlen -= sizeof(struct ip6_dest);
|
| 3369 |
|
|
opt = (u_int8_t *)dstopts + sizeof(struct ip6_dest);
|
| 3370 |
|
|
for (optlen = 0; (dstoptlen > 0 && finished == 0);
|
| 3371 |
|
|
dstoptlen -= optlen, opt += optlen) {
|
| 3372 |
|
|
if ((*opt != IP6OPT_PAD1) &&
|
| 3373 |
|
|
(dstoptlen < IP6OPT_MINLEN || *(opt + 1) + 2 > dstoptlen)) {
|
| 3374 |
|
|
error = EINVAL;
|
| 3375 |
|
|
goto bad;
|
| 3376 |
|
|
}
|
| 3377 |
|
|
switch (*opt) {
|
| 3378 |
|
|
case IP6OPT_PAD1:
|
| 3379 |
|
|
optlen = 1;
|
| 3380 |
|
|
break;
|
| 3381 |
|
|
case IP6OPT_PADN:
|
| 3382 |
|
|
optlen = *(opt + 1) + 2;
|
| 3383 |
|
|
break;
|
| 3384 |
|
|
case IP6OPT_HOME_ADDRESS:
|
| 3385 |
|
|
haopt = (struct ip6_opt_home_address *)opt;
|
| 3386 |
|
|
optlen = haopt->ip6oh_len + 2;
|
| 3387 |
|
|
if (optlen < sizeof(*haopt)) {
|
| 3388 |
|
|
error = EINVAL;
|
| 3389 |
|
|
goto bad;
|
| 3390 |
|
|
}
|
| 3391 |
|
|
|
| 3392 |
|
|
/* swap */
|
| 3393 |
|
|
bcopy(haopt->ip6oh_addr, &t,
|
| 3394 |
|
|
sizeof(haopt->ip6oh_addr));
|
| 3395 |
|
|
bcopy(&oip6->ip6_src,
|
| 3396 |
|
|
haopt->ip6oh_addr,
|
| 3397 |
|
|
sizeof(oip6->ip6_src));
|
| 3398 |
|
|
bcopy(&t, &oip6->ip6_src,
|
| 3399 |
|
|
sizeof(t));
|
| 3400 |
|
|
finished = 1;
|
| 3401 |
|
|
break;
|
| 3402 |
|
|
default:
|
| 3403 |
|
|
optlen = ip6_unknown_opt(opt, m,
|
| 3404 |
|
|
opt - mtod(m, u_int8_t *));
|
| 3405 |
|
|
if (optlen == -1) {
|
| 3406 |
|
|
error = EINVAL;
|
| 3407 |
|
|
goto bad;
|
| 3408 |
|
|
}
|
| 3409 |
|
|
optlen += 2;
|
| 3410 |
|
|
break;
|
| 3411 |
|
|
}
|
| 3412 |
|
|
}
|
| 3413 |
|
|
break;
|
| 3414 |
|
|
|
| 3415 |
|
|
default:
|
| 3416 |
|
|
#ifndef PULLDOWN_TEST
|
| 3417 |
|
|
IP6_EXTHDR_CHECK(m, off, sizeof(struct ip6_ext),
|
| 3418 |
|
|
ENOBUFS);
|
| 3419 |
|
|
exts = (struct ip6_ext *)(mtod(m, caddr_t) + off);
|
| 3420 |
|
|
#else
|
| 3421 |
|
|
IP6_EXTHDR_GET(exts, struct ip6_ext *,
|
| 3422 |
|
|
m, off, sizeof(*exts));
|
| 3423 |
|
|
if (exts == NULL) {
|
| 3424 |
|
|
error = ENOBUFS;
|
| 3425 |
|
|
goto bad;
|
| 3426 |
|
|
}
|
| 3427 |
|
|
#endif
|
| 3428 |
|
|
if (nxt == IPPROTO_AH)
|
| 3429 |
|
|
off += (exts->ip6e_len + 2) << 2;
|
| 3430 |
|
|
else
|
| 3431 |
|
|
off += (exts->ip6e_len + 1) << 3;
|
| 3432 |
|
|
nxt = exts->ip6e_nxt;
|
| 3433 |
|
|
break;
|
| 3434 |
|
|
}
|
| 3435 |
|
|
if (finished)
|
| 3436 |
|
|
break;
|
| 3437 |
|
|
}
|
| 3438 |
|
|
|
| 3439 |
|
|
return (0);
|
| 3440 |
|
|
bad:
|
| 3441 |
|
|
ip6_delaux(m);
|
| 3442 |
|
|
m_freem(m);
|
| 3443 |
|
|
return (error);
|
| 3444 |
|
|
}
|
| 3445 |
|
|
|
| 3446 |
|
|
#if defined(__NetBSD__) || defined(__OpenBSD__)
|
| 3447 |
|
|
static struct rtentry *
|
| 3448 |
|
|
icmp6_mtudisc_clone(dst)
|
| 3449 |
|
|
struct sockaddr *dst;
|
| 3450 |
|
|
{
|
| 3451 |
|
|
struct rtentry *rt;
|
| 3452 |
|
|
int error;
|
| 3453 |
|
|
|
| 3454 |
|
|
rt = rtalloc1(dst, 1);
|
| 3455 |
|
|
if (rt == 0)
|
| 3456 |
|
|
return NULL;
|
| 3457 |
|
|
|
| 3458 |
|
|
/* If we didn't get a host route, allocate one */
|
| 3459 |
|
|
if ((rt->rt_flags & RTF_HOST) == 0) {
|
| 3460 |
|
|
struct rtentry *nrt;
|
| 3461 |
|
|
|
| 3462 |
|
|
error = rtrequest((int) RTM_ADD, dst,
|
| 3463 |
|
|
(struct sockaddr *) rt->rt_gateway,
|
| 3464 |
|
|
(struct sockaddr *) 0,
|
| 3465 |
|
|
RTF_GATEWAY | RTF_HOST | RTF_DYNAMIC, &nrt);
|
| 3466 |
|
|
if (error) {
|
| 3467 |
|
|
rtfree(rt);
|
| 3468 |
|
|
return NULL;
|
| 3469 |
|
|
}
|
| 3470 |
|
|
nrt->rt_rmx = rt->rt_rmx;
|
| 3471 |
|
|
rtfree(rt);
|
| 3472 |
|
|
rt = nrt;
|
| 3473 |
|
|
}
|
| 3474 |
|
|
error = rt_timer_add(rt, icmp6_mtudisc_timeout,
|
| 3475 |
|
|
icmp6_mtudisc_timeout_q);
|
| 3476 |
|
|
if (error) {
|
| 3477 |
|
|
rtfree(rt);
|
| 3478 |
|
|
return NULL;
|
| 3479 |
|
|
}
|
| 3480 |
|
|
|
| 3481 |
|
|
return rt; /* caller need to call rtfree() */
|
| 3482 |
|
|
}
|
| 3483 |
|
|
|
| 3484 |
|
|
static void
|
| 3485 |
|
|
icmp6_mtudisc_timeout(rt, r)
|
| 3486 |
|
|
struct rtentry *rt;
|
| 3487 |
|
|
struct rttimer *r;
|
| 3488 |
|
|
{
|
| 3489 |
|
|
if (rt == NULL)
|
| 3490 |
|
|
panic("icmp6_mtudisc_timeout: bad route to timeout");
|
| 3491 |
|
|
if ((rt->rt_flags & (RTF_DYNAMIC | RTF_HOST)) ==
|
| 3492 |
|
|
(RTF_DYNAMIC | RTF_HOST)) {
|
| 3493 |
|
|
rtrequest((int) RTM_DELETE, (struct sockaddr *)rt_key(rt),
|
| 3494 |
|
|
rt->rt_gateway, rt_mask(rt), rt->rt_flags, 0);
|
| 3495 |
|
|
} else {
|
| 3496 |
|
|
if ((rt->rt_rmx.rmx_locks & RTV_MTU) == 0)
|
| 3497 |
|
|
rt->rt_rmx.rmx_mtu = rt->rt_ifp->if_mtu;
|
| 3498 |
|
|
}
|
| 3499 |
|
|
}
|
| 3500 |
|
|
|
| 3501 |
|
|
static void
|
| 3502 |
|
|
icmp6_redirect_timeout(rt, r)
|
| 3503 |
|
|
struct rtentry *rt;
|
| 3504 |
|
|
struct rttimer *r;
|
| 3505 |
|
|
{
|
| 3506 |
|
|
if (rt == NULL)
|
| 3507 |
|
|
panic("icmp6_redirect_timeout: bad route to timeout");
|
| 3508 |
|
|
if ((rt->rt_flags & (RTF_GATEWAY | RTF_DYNAMIC | RTF_HOST)) ==
|
| 3509 |
|
|
(RTF_GATEWAY | RTF_DYNAMIC | RTF_HOST)) {
|
| 3510 |
|
|
rtrequest((int) RTM_DELETE, (struct sockaddr *)rt_key(rt),
|
| 3511 |
|
|
rt->rt_gateway, rt_mask(rt), rt->rt_flags, 0);
|
| 3512 |
|
|
}
|
| 3513 |
|
|
}
|
| 3514 |
|
|
#endif /* __NetBSD__ || __OpenBSD__ */
|
| 3515 |
|
|
|
| 3516 |
|
|
#ifdef __bsdi__
|
| 3517 |
|
|
void
|
| 3518 |
|
|
icmp6_mtuexpire(rt, rtt)
|
| 3519 |
|
|
struct rtentry *rt;
|
| 3520 |
|
|
struct rttimer *rtt;
|
| 3521 |
|
|
{
|
| 3522 |
|
|
rt->rt_flags |= RTF_PROBEMTU;
|
| 3523 |
|
|
Free(rtt);
|
| 3524 |
|
|
}
|
| 3525 |
|
|
|
| 3526 |
|
|
int *icmp6_sysvars[] = ICMPV6CTL_VARS;
|
| 3527 |
|
|
|
| 3528 |
|
|
int
|
| 3529 |
|
|
icmp6_sysctl(name, namelen, oldp, oldlenp, newp, newlen)
|
| 3530 |
|
|
int *name;
|
| 3531 |
|
|
u_int namelen;
|
| 3532 |
|
|
void *oldp;
|
| 3533 |
|
|
size_t *oldlenp;
|
| 3534 |
|
|
void *newp;
|
| 3535 |
|
|
size_t newlen;
|
| 3536 |
|
|
{
|
| 3537 |
|
|
if (name[0] >= ICMPV6CTL_MAXID)
|
| 3538 |
|
|
return (EOPNOTSUPP);
|
| 3539 |
|
|
switch (name[0]) {
|
| 3540 |
|
|
#if 0
|
| 3541 |
|
|
ICMPV6CTL_ND6_PRUNE:
|
| 3542 |
|
|
ICMPV6CTL_ND6_DELAY:
|
| 3543 |
|
|
ICMPV6CTL_ND6_UMAXTRIES:
|
| 3544 |
|
|
ICMPV6CTL_ND6_MMAXTRIES:
|
| 3545 |
|
|
ICMPV6CTL_ND6_USELOOPBACK:
|
| 3546 |
|
|
/* need to check the value. */
|
| 3547 |
|
|
#endif
|
| 3548 |
|
|
case ICMPV6CTL_STATS:
|
| 3549 |
|
|
return sysctl_rdtrunc(oldp, oldlenp, newp, &icmp6stat,
|
| 3550 |
|
|
sizeof(icmp6stat));
|
| 3551 |
|
|
case ICMPV6CTL_ND6_DRLIST:
|
| 3552 |
|
|
case ICMPV6CTL_ND6_PRLIST:
|
| 3553 |
|
|
return nd6_sysctl(name[0], oldp, oldlenp, newp, newlen);
|
| 3554 |
|
|
default:
|
| 3555 |
|
|
return (sysctl_int_arr(icmp6_sysvars, name, namelen,
|
| 3556 |
|
|
oldp, oldlenp, newp, newlen));
|
| 3557 |
|
|
}
|
| 3558 |
|
|
}
|
| 3559 |
|
|
#endif /* __bsdi__ */
|
| 3560 |
|
|
|
| 3561 |
|
|
#if defined(__NetBSD__) || defined(__OpenBSD__)
|
| 3562 |
|
|
#include <vm/vm.h>
|
| 3563 |
|
|
#include <sys/sysctl.h>
|
| 3564 |
|
|
int
|
| 3565 |
|
|
icmp6_sysctl(name, namelen, oldp, oldlenp, newp, newlen)
|
| 3566 |
|
|
int *name;
|
| 3567 |
|
|
u_int namelen;
|
| 3568 |
|
|
void *oldp;
|
| 3569 |
|
|
size_t *oldlenp;
|
| 3570 |
|
|
void *newp;
|
| 3571 |
|
|
size_t newlen;
|
| 3572 |
|
|
{
|
| 3573 |
|
|
|
| 3574 |
|
|
/* All sysctl names at this level are terminal. */
|
| 3575 |
|
|
if (namelen != 1)
|
| 3576 |
|
|
return ENOTDIR;
|
| 3577 |
|
|
|
| 3578 |
|
|
switch (name[0]) {
|
| 3579 |
|
|
|
| 3580 |
|
|
case ICMPV6CTL_REDIRACCEPT:
|
| 3581 |
|
|
return sysctl_int(oldp, oldlenp, newp, newlen,
|
| 3582 |
|
|
&icmp6_rediraccept);
|
| 3583 |
|
|
case ICMPV6CTL_REDIRTIMEOUT:
|
| 3584 |
|
|
return sysctl_int(oldp, oldlenp, newp, newlen,
|
| 3585 |
|
|
&icmp6_redirtimeout);
|
| 3586 |
|
|
case ICMPV6CTL_STATS:
|
| 3587 |
|
|
return sysctl_rdstruct(oldp, oldlenp, newp,
|
| 3588 |
|
|
&icmp6stat, sizeof(icmp6stat));
|
| 3589 |
|
|
case ICMPV6CTL_ND6_PRUNE:
|
| 3590 |
|
|
return sysctl_int(oldp, oldlenp, newp, newlen, &nd6_prune);
|
| 3591 |
|
|
case ICMPV6CTL_ND6_DELAY:
|
| 3592 |
|
|
return sysctl_int(oldp, oldlenp, newp, newlen, &nd6_delay);
|
| 3593 |
|
|
case ICMPV6CTL_ND6_UMAXTRIES:
|
| 3594 |
|
|
return sysctl_int(oldp, oldlenp, newp, newlen, &nd6_umaxtries);
|
| 3595 |
|
|
case ICMPV6CTL_ND6_MMAXTRIES:
|
| 3596 |
|
|
return sysctl_int(oldp, oldlenp, newp, newlen, &nd6_mmaxtries);
|
| 3597 |
|
|
case ICMPV6CTL_ND6_USELOOPBACK:
|
| 3598 |
|
|
return sysctl_int(oldp, oldlenp, newp, newlen,
|
| 3599 |
|
|
&nd6_useloopback);
|
| 3600 |
|
|
case ICMPV6CTL_NODEINFO:
|
| 3601 |
|
|
return sysctl_int(oldp, oldlenp, newp, newlen, &icmp6_nodeinfo);
|
| 3602 |
|
|
case ICMPV6CTL_ERRPPSLIMIT:
|
| 3603 |
|
|
return sysctl_int(oldp, oldlenp, newp, newlen, &icmp6errppslim);
|
| 3604 |
|
|
case ICMPV6CTL_ND6_MAXNUDHINT:
|
| 3605 |
|
|
return sysctl_int(oldp, oldlenp, newp, newlen,
|
| 3606 |
|
|
&nd6_maxnudhint);
|
| 3607 |
|
|
case ICMPV6CTL_MTUDISC_HIWAT:
|
| 3608 |
|
|
return sysctl_int(oldp, oldlenp, newp, newlen,
|
| 3609 |
|
|
&icmp6_mtudisc_hiwat);
|
| 3610 |
|
|
case ICMPV6CTL_MTUDISC_LOWAT:
|
| 3611 |
|
|
return sysctl_int(oldp, oldlenp, newp, newlen,
|
| 3612 |
|
|
&icmp6_mtudisc_lowat);
|
| 3613 |
|
|
case ICMPV6CTL_ND6_DEBUG:
|
| 3614 |
|
|
return sysctl_int(oldp, oldlenp, newp, newlen, &nd6_debug);
|
| 3615 |
|
|
case ICMPV6CTL_ND6_DRLIST:
|
| 3616 |
|
|
case ICMPV6CTL_ND6_PRLIST:
|
| 3617 |
|
|
return nd6_sysctl(name[0], oldp, oldlenp, newp, newlen);
|
| 3618 |
|
|
default:
|
| 3619 |
|
|
return ENOPROTOOPT;
|
| 3620 |
|
|
}
|
| 3621 |
|
|
/* NOTREACHED */
|
| 3622 |
|
|
}
|
| 3623 |
|
|
#endif /* __NetBSD__ */
|
