Add ip6addrctl from FreeBSD
This commit is contained in:
christos
parent
5b5956f338
commit
b649613962
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@ -0,0 +1,7 @@
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# $NetBSD: Makefile,v 1.1 2015/12/12 23:35:56 christos Exp $
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# $FreeBSD: head/usr.sbin/ip6addrctl/Makefile 241134 2012-10-02 14:48:03Z eadler $
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PROG= ip6addrctl
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MAN= ip6addrctl.8
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.include <bsd.prog.mk>
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.\" $NetBSD: ip6addrctl.8,v 1.1 2015/12/12 23:35:56 christos Exp $
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.\" $KAME: ip6addrctl.8,v 1.3 2003/03/22 05:56:41 jinmei Exp $
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.\"
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.\" Copyright (C) 2001 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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.\" $FreeBSD: head/usr.sbin/ip6addrctl/ip6addrctl.8 140368 2005-01-17 07:44:44Z ru $
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.\"
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.Dd September 25, 2001
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.Dt IP6ADDRCTL 8
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.Os
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.\"
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.Sh NAME
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.Nm ip6addrctl
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.Nd configure address selection policy for IPv6 and IPv4
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.\"
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.Sh SYNOPSIS
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.Nm
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.Op Cm show
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.Nm
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.Cm add
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.Ar prefix precedence label
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.Nm
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.Cm delete
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.Ar prefix
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.Nm
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.Cm flush
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.Nm
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.Cm install
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.Ar configfile
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.\"
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.Sh DESCRIPTION
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The
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.Nm
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utility manages the policy table of source and destination address
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selection for outgoing IPv4 and IPv6 packets.
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When
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.Nm
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is invoked without an argument or with a single argument
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.Cm show ,
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it prints the content of the policy table currently installed in the
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kernel.
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.Pp
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To modify the table, the following operations are available:
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.Bl -tag -width indent
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.It Cm add Ar prefix precedence label
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Add a policy entry.
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The
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.Ar prefix
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argument
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is an IPv6 prefix, which is a key for the entry.
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An IPv4 prefix should be specified with an IPv6 prefix using an
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IPv4-mapped IPv6 address.
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The
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.Ar precedence
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and
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.Ar label
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arguments
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are decimal numbers, which specify the precedence and label values
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for the entry, respectively.
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This operation should be performed without an existing entry for the
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prefix.
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.It Cm delete Ar prefix
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Delete a policy entry specified by
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.Ar prefix ,
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which should be an IPv6 prefix.
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A corresponding entry for the prefix should have already been
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installed.
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.It Cm flush
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Delete all existing policy entries in the kernel.
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.It Cm install Ar configfile
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Install policy entries from a configuration file named
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.Ar configfile .
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The configuration file should contain a set of policy entries.
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Each entry is specified in a single line which contains an IPv6 prefix,
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a decimal precedence value, and a decimal label value, separated with
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white space or tab characters.
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In the configuration file, lines beginning with the pound-sign
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.Pq Ql #
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are
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comments and are ignored.
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.El
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.\"
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.Sh EXIT STATUS
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.Ex -std
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.\"
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.Sh SEE ALSO
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.Rs
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.%A "Richard Draves"
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.%T "Default Address Selection for IPv6"
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.%N RFC 3484
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.Re
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.\"
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.Sh HISTORY
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The
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.Nm
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utility first appeared in the KAME IPv6 protocol stack kit.
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The original command name was
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.Nm addrselect ,
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but it was then renamed to the current one so that the name would
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describe its function well.
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.\" .Sh BUGS
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.\" (to be written)
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@ -0,0 +1,458 @@
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/* $KAME: ip6addrctl.c,v 1.3 2003/12/16 08:14:28 suz Exp $ */
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/*
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* Copyright (C) 2001 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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* $FreeBSD: head/usr.sbin/ip6addrctl/ip6addrctl.c 281143 2015-04-06 09:42:23Z glebius $
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*/
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#include <sys/cdefs.h>
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__RCSID("$NetBSD: ip6addrctl.c,v 1.1 2015/12/12 23:35:56 christos Exp $");
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/queue.h>
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#include <sys/param.h>
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#include <sys/ioctl.h>
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#include <sys/sysctl.h>
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#include <net/if.h>
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#include <netinet/in.h>
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#include <netinet6/in6_var.h>
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#include <stdlib.h>
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#include <netdb.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <limits.h>
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#include <string.h>
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#include <err.h>
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static char *configfile;
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struct policyqueue {
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TAILQ_ENTRY(policyqueue) pc_entry;
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struct in6_addrpolicy pc_policy;
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};
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TAILQ_HEAD(policyhead, policyqueue);
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static struct policyhead policyhead;
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static void usage(void);
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static void get_policy(void);
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static void dump_policy(void);
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static int mask2plen(struct sockaddr_in6 *);
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static int parse_prefix(const char *, struct in6_addrpolicy *);
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static void make_policy_fromfile(char *);
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static void plen2mask(struct sockaddr_in6 *, int);
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static void set_policy(void);
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static void add_policy(char *, char *, char *);
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static void delete_policy(char *);
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static void flush_policy(void);
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int
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main(int argc, char *argv[])
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{
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TAILQ_INIT(&policyhead);
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if (argc == 1 || strcasecmp(argv[1], "show") == 0) {
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get_policy();
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dump_policy();
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} else if (strcasecmp(argv[1], "add") == 0) {
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if (argc < 5)
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usage();
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add_policy(argv[2], argv[3], argv[4]);
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} else if (strcasecmp(argv[1], "delete") == 0) {
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if (argc < 3)
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usage();
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delete_policy(argv[2]);
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} else if (strcasecmp(argv[1], "flush") == 0) {
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get_policy();
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flush_policy();
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} else if (strcasecmp(argv[1], "install") == 0) {
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if (argc < 3)
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usage();
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configfile = argv[2];
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make_policy_fromfile(configfile);
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set_policy();
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} else
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usage();
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exit(0);
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}
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static void
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get_policy(void)
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{
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int mib[] = { CTL_NET, PF_INET6, IPPROTO_IPV6, IPV6CTL_ADDRCTLPOLICY };
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size_t l;
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struct in6_addrpolicy *buf;
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struct in6_addrpolicy *pol, *ep;
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if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) {
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err(1, "sysctl(IPV6CTL_ADDRCTLPOLICY)");
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/* NOTREACHED */
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}
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if (l == 0) {
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printf("no source-address-selection policy is installed\n");
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return;
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}
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if ((buf = malloc(l)) == NULL) {
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errx(1, "malloc failed");
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/* NOTREACHED */
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}
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if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
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err(1, "sysctl(IPV6CTL_ADDRCTLPOLICY)");
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/* NOTREACHED */
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}
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ep = buf + l/sizeof(*buf);
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for (pol = buf; pol + 1 <= ep; pol++) {
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struct policyqueue *new;
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if ((new = malloc(sizeof(*new))) == NULL)
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errx(1, "malloc failed\n");
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new->pc_policy = *pol;
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TAILQ_INSERT_TAIL(&policyhead, new, pc_entry);
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}
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free(buf);
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}
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static void
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dump_policy(void)
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{
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size_t addrlen;
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char addrbuf[NI_MAXHOST];
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struct in6_addrpolicy *pol;
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struct policyqueue *ent;
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int plen, first = 1;
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for (ent = TAILQ_FIRST(&policyhead); ent;
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ent = TAILQ_NEXT(ent, pc_entry)) {
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pol = &ent->pc_policy;
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if (first) {
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printf("%-30s %5s %5s %8s\n",
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"Prefix", "Prec", "Label", "Use");
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first = 0;
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}
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if ((getnameinfo((struct sockaddr *)&pol->addr,
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sizeof(pol->addr), addrbuf, sizeof(addrbuf),
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NULL, 0, NI_NUMERICHOST))) {
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warnx("getnameinfo for prefix address failed");
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continue;
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}
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if ((plen = mask2plen(&pol->addrmask)) < 0) {
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warnx("invalid address mask");
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continue;
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}
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addrlen = strlen(addrbuf);
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if (addrlen + sizeof("/128") < sizeof(addrbuf)) {
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snprintf(&addrbuf[addrlen],
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sizeof(addrbuf) - addrlen - 1,
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"/%d", plen);
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printf("%-30s", addrbuf);
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} else /* XXX */
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printf("%s/%d", addrbuf, plen);
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printf(" %5d %5d %8llu\n", pol->preced, pol->label,
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(unsigned long long)pol->use);
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}
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}
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#define SKIP_WHITE(p, emptyok) \
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do { \
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while((*(p) == ' ' || *(p) == '\t')) \
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(p)++; \
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if ((*(p) == '\0' || (*(p) == '\n')) && !(emptyok)) \
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goto bad; \
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} while (0);
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#define SKIP_WORD(p) \
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do { \
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while(*(p) != ' ' && *(p) != '\t') \
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(p)++; \
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if (*(p) == '\0' || *(p) == '\n') \
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goto bad; \
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} while (0);
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static void
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make_policy_fromfile(char *conf)
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{
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char line[_POSIX2_LINE_MAX], *cp;
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char *addrstr;
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FILE *fp;
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int count = 0;
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struct in6_addrpolicy pol0;
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struct policyqueue *new;
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if ((fp = fopen(conf, "r")) == NULL)
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err(1, "fopen: %s", conf);
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while(fgets(line, sizeof(line), fp)) {
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count++;
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cp = line;
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memset(&pol0, 0, sizeof(pol0));
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/* get prefix */
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SKIP_WHITE(cp, 1);
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if (*cp == '\n') /* empty line */
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continue;
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if (*cp == '#')
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continue;
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addrstr = cp;
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if (parse_prefix((const char *)addrstr, &pol0))
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goto bad;
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/* get precedence value */
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SKIP_WORD(cp);
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SKIP_WHITE(cp, 0);
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pol0.preced = atoi(cp);
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/* get label */
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SKIP_WORD(cp);
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SKIP_WHITE(cp, 0);
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pol0.label = atoi(cp);
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/* parse succeeded. make a control buffer entry. */
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if ((new = malloc(sizeof(*new))) == NULL)
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errx(1, "malloc failed\n");
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memset(new, 0, sizeof(*new));
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new->pc_policy = pol0;
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TAILQ_INSERT_TAIL(&policyhead, new, pc_entry);
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}
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fclose(fp);
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return;
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bad:
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errx(1, "parse failed at line %d", count);
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/* NOTREACHED */
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}
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static int
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parse_prefix(const char *prefix0, struct in6_addrpolicy *pol)
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{
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int e = 0, plen;
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char *prefix, *plenstr;
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struct addrinfo hints, *res;
|
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if ((prefix = strdup(prefix0)) == NULL)
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errx(1, "strdup failed");
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if ((plenstr = strchr(prefix, '/')) == NULL) {
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e = -1;
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goto end;
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}
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*plenstr = '\0';
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memset(&hints, 0, sizeof(hints));
|
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hints.ai_flags = AI_NUMERICHOST;
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hints.ai_family = AF_INET6;
|
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if ((e = getaddrinfo(prefix, NULL, &hints, &res)) != 0) {
|
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warnx("getaddrinfo failed for %s: %s", prefix,
|
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gai_strerror(e));
|
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goto end;
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}
|
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memcpy(&pol->addr, res->ai_addr, res->ai_addrlen);
|
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freeaddrinfo(res);
|
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plen = atoi(plenstr + 1);
|
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if (plen < 0 || plen > 128) {
|
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warnx("invalid prefix length: %d", plen);
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e = -1;
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goto end;
|
||||
}
|
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plen2mask(&pol->addrmask, plen);
|
||||
|
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end:
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free(prefix);
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return(e);
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}
|
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|
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static void
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plen2mask(struct sockaddr_in6 *mask, int plen)
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{
|
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u_char *cp = (unsigned char *)&mask->sin6_addr;
|
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|
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memset(mask, 0, sizeof(*mask));
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mask->sin6_family = AF_INET6; /* just in case */
|
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mask->sin6_len = sizeof(*mask);
|
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|
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for(; plen >= 8; plen -= 8)
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*cp++ = 0xff;
|
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if (plen > 0)
|
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*cp = (0xff << (8 - plen));
|
||||
}
|
||||
|
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static void
|
||||
set_policy(void)
|
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{
|
||||
struct policyqueue *ent;
|
||||
int s;
|
||||
|
||||
if ((s = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP)) < 0)
|
||||
err(1, "socket(UDP)");
|
||||
|
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for (ent = TAILQ_FIRST(&policyhead); ent;
|
||||
ent = TAILQ_NEXT(ent, pc_entry)) {
|
||||
if (ioctl(s, SIOCAADDRCTL_POLICY, &ent->pc_policy))
|
||||
warn("ioctl(SIOCAADDRCTL_POLICY)");
|
||||
}
|
||||
|
||||
close(s);
|
||||
}
|
||||
|
||||
static int
|
||||
mask2plen(struct sockaddr_in6 *mask)
|
||||
{
|
||||
int masklen, final = 0;
|
||||
u_char *p, *lim;
|
||||
|
||||
masklen = 0;
|
||||
lim = (u_char *)(mask + 1);
|
||||
for (p = (u_char *)(&mask->sin6_addr); p < lim; p++) {
|
||||
if (final && *p) {
|
||||
goto bad;
|
||||
}
|
||||
|
||||
switch (*p & 0xff) {
|
||||
case 0xff:
|
||||
masklen += 8;
|
||||
break;
|
||||
case 0xfe:
|
||||
masklen += 7;
|
||||
final++;
|
||||
break;
|
||||
case 0xfc:
|
||||
masklen += 6;
|
||||
final++;
|
||||
break;
|
||||
case 0xf8:
|
||||
masklen += 5;
|
||||
final++;
|
||||
break;
|
||||
case 0xf0:
|
||||
masklen += 4;
|
||||
final++;
|
||||
break;
|
||||
case 0xe0:
|
||||
masklen += 3;
|
||||
final++;
|
||||
break;
|
||||
case 0xc0:
|
||||
masklen += 2;
|
||||
final++;
|
||||
break;
|
||||
case 0x80:
|
||||
masklen += 1;
|
||||
final++;
|
||||
break;
|
||||
case 0x00:
|
||||
final++;
|
||||
break;
|
||||
default:
|
||||
goto bad;
|
||||
break;
|
||||
}
|
||||
}
|
||||
return(masklen);
|
||||
|
||||
bad:
|
||||
return(-1);
|
||||
}
|
||||
|
||||
static void
|
||||
add_policy(char *prefix, char *prec, char *label)
|
||||
{
|
||||
struct in6_addrpolicy p;
|
||||
int s;
|
||||
|
||||
memset(&p, 0, sizeof(p));
|
||||
|
||||
if (parse_prefix((const char *)prefix, &p))
|
||||
errx(1, "bad prefix: %s", prefix);
|
||||
p.preced = atoi(prec);
|
||||
p.label = atoi(label);
|
||||
|
||||
if ((s = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP)) < 0)
|
||||
err(1, "socket(UDP)");
|
||||
if (ioctl(s, SIOCAADDRCTL_POLICY, &p))
|
||||
err(1, "ioctl(SIOCAADDRCTL_POLICY)");
|
||||
|
||||
close(s);
|
||||
}
|
||||
|
||||
static void
|
||||
delete_policy(char *prefix)
|
||||
{
|
||||
struct in6_addrpolicy p;
|
||||
int s;
|
||||
|
||||
memset(&p, 0, sizeof(p));
|
||||
|
||||
if (parse_prefix((const char *)prefix, &p))
|
||||
errx(1, "bad prefix: %s", prefix);
|
||||
|
||||
if ((s = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP)) < 0)
|
||||
err(1, "socket(UDP)");
|
||||
if (ioctl(s, SIOCDADDRCTL_POLICY, &p))
|
||||
err(1, "ioctl(SIOCDADDRCTL_POLICY)");
|
||||
|
||||
close(s);
|
||||
}
|
||||
|
||||
static void
|
||||
flush_policy(void)
|
||||
{
|
||||
struct policyqueue *ent;
|
||||
int s;
|
||||
|
||||
if ((s = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP)) < 0)
|
||||
err(1, "socket(UDP)");
|
||||
|
||||
for (ent = TAILQ_FIRST(&policyhead); ent;
|
||||
ent = TAILQ_NEXT(ent, pc_entry)) {
|
||||
if (ioctl(s, SIOCDADDRCTL_POLICY, &ent->pc_policy))
|
||||
warn("ioctl(SIOCDADDRCTL_POLICY)");
|
||||
}
|
||||
|
||||
close(s);
|
||||
}
|
||||
|
||||
static void
|
||||
usage(void)
|
||||
{
|
||||
fprintf(stderr, "usage: ip6addrctl [show]\n");
|
||||
fprintf(stderr, " ip6addrctl add "
|
||||
"<prefix> <precedence> <label>\n");
|
||||
fprintf(stderr, " ip6addrctl delete <prefix>\n");
|
||||
fprintf(stderr, " ip6addrctl flush\n");
|
||||
fprintf(stderr, " ip6addrctl install <configfile>\n");
|
||||
|
||||
exit(1);
|
||||
}
|
||||
|
|
@ -0,0 +1,12 @@
|
|||
# default policy table based on RFC 3484.
|
||||
# usage: ip6addrctl install path_to_this_file
|
||||
#
|
||||
# $FreeBSD: head/usr.sbin/ip6addrctl/ip6addrctl.conf.sample 123872 2003-12-26 17:10:58Z ume $
|
||||
#
|
||||
#Format:
|
||||
#Prefix Precedence Label
|
||||
::1/128 50 0
|
||||
::/0 40 1
|
||||
2002::/16 30 2
|
||||
::/96 20 3
|
||||
::ffff:0:0/96 10 4
|
||||
Loading…
Reference in New Issue