475 lines
13 KiB
Bash
Executable File
475 lines
13 KiB
Bash
Executable File
#!/bin/sh
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#
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# $NetBSD: network,v 1.58 2009/05/14 15:33:36 roy Exp $
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#
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# PROVIDE: network
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# REQUIRE: ipfilter ipsec mountcritlocal root tty sysctl
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# BEFORE: NETWORKING
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$_rc_subr_loaded . /etc/rc.subr
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name="network"
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start_cmd="network_start"
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stop_cmd="network_stop"
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nl='
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' # a newline
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network_start()
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{
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# set hostname, turn on network
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#
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echo "Starting network."
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# If $hostname is set, use it for my Internet name,
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# otherwise use /etc/myname
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#
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if [ -z "$hostname" ] && [ -f /etc/myname ]; then
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hostname=$(cat /etc/myname)
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fi
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if [ -n "$hostname" ]; then
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echo "Hostname: $hostname"
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hostname $hostname
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else
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# Don't warn about it if we're going to run
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# DHCP later, as we will probably get the
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# hostname at that time.
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#
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if ! checkyesno dhclient && ! checkyesno dhcpcd && \
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[ -z "$(hostname)" ]
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then
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warn "\$hostname not set."
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fi
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fi
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# Check $domainname first, then /etc/defaultdomain,
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# for NIS/YP domain name
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#
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if [ -z "$domainname" ] && [ -f /etc/defaultdomain ]; then
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domainname=$(cat /etc/defaultdomain)
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fi
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if [ -n "$domainname" ]; then
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echo "NIS domainname: $domainname"
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domainname $domainname
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fi
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# Flush all routes just to make sure it is clean
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if checkyesno flushroutes; then
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/sbin/route -qn flush
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fi
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# Set the address for the first loopback interface, so that the
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# auto-route from a newly configured interface's address to lo0
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# works correctly.
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#
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# NOTE: obscure networking problems will occur if lo0 isn't configured.
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#
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/sbin/ifconfig lo0 inet 127.0.0.1
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# According to RFC1122, 127.0.0.0/8 must not leave the node.
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#
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/sbin/route -q add -inet 127.0.0.0 -netmask 0xff000000 127.0.0.1 -reject
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# IPv6 routing setups, and host/router mode selection.
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#
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if /sbin/ifconfig lo0 inet6 >/dev/null 2>&1; then
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# We have IPv6 support in kernel.
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# disallow link-local unicast dest without outgoing scope
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# identifiers.
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#
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/sbin/route -q add -inet6 fe80:: -prefixlen 10 ::1 -reject
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# disallow the use of the RFC3849 documentation address
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#
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/sbin/route -q add -inet6 2001:db8:: -prefixlen 32 ::1 -reject
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# IPv6 site-local scoped address prefix (fec0::/10)
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# has been deprecated by RFC3879.
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#
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if [ -n "$ip6sitelocal" ]; then
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warn "\$ip6sitelocal is no longer valid"
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fi
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# disallow "internal" addresses to appear on the wire.
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#
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/sbin/route -q add -inet6 ::ffff:0.0.0.0 -prefixlen 96 ::1 -reject
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# disallow packets to malicious IPv4 compatible prefix
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#
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/sbin/route -q add -inet6 ::224.0.0.0 -prefixlen 100 ::1 -reject
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/sbin/route -q add -inet6 ::127.0.0.0 -prefixlen 104 ::1 -reject
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/sbin/route -q add -inet6 ::0.0.0.0 -prefixlen 104 ::1 -reject
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/sbin/route -q add -inet6 ::255.0.0.0 -prefixlen 104 ::1 -reject
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# disallow packets to malicious 6to4 prefix
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#
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/sbin/route -q add -inet6 2002:e000:: -prefixlen 20 ::1 -reject
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/sbin/route -q add -inet6 2002:7f00:: -prefixlen 24 ::1 -reject
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/sbin/route -q add -inet6 2002:0000:: -prefixlen 24 ::1 -reject
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/sbin/route -q add -inet6 2002:ff00:: -prefixlen 24 ::1 -reject
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# Completely disallow packets to IPv4 compatible prefix.
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# This may conflict with RFC1933 under following circumstances:
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# (1) An IPv6-only KAME node tries to originate packets to IPv4
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# compatible destination. The KAME node has no IPv4
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# compatible support. Under RFC1933, it should transmit
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# native IPv6 packets toward IPv4 compatible destination,
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# hoping it would reach a router that forwards the packet
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# toward auto-tunnel interface.
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# (2) An IPv6-only node originates a packet to IPv4 compatible
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# destination. A KAME node is acting as an IPv6 router, and
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# asked to forward it.
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# Due to rare use of IPv4 compatible address, and security
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# issues with it, we disable it by default.
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#
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/sbin/route -q add -inet6 ::0.0.0.0 -prefixlen 96 ::1 -reject
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/sbin/sysctl -qw net.inet6.ip6.forwarding=0
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/sbin/sysctl -qw net.inet6.ip6.accept_rtadv=0
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case $ip6mode in
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router)
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echo 'IPv6 mode: router'
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/sbin/sysctl -qw net.inet6.ip6.forwarding=1
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# disallow unique-local unicast forwarding without
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# explicit configuration.
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if ! checkyesno ip6uniquelocal; then
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/sbin/route -q add -inet6 fc00:: -prefixlen 7 \
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::1 -reject
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fi
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;;
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autohost)
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echo 'IPv6 mode: autoconfigured host'
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/sbin/sysctl -qw net.inet6.ip6.accept_rtadv=1
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;;
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host)
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echo 'IPv6 mode: host'
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;;
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*) warn "invalid \$ip6mode value "\"$ip6mode\"
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;;
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esac
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fi
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# Configure all of the network interfaces listed in $net_interfaces;
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# if $auto_ifconfig is YES, grab all interfaces from ifconfig.
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# In the following, "xxN" stands in for interface names, like "le0".
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#
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# For any interfaces that has an $ifconfig_xxN variable
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# associated, we break it into lines using ';' as a separator,
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# then process it just like the contents of an /etc/ifconfig.xxN
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# file.
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#
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# For each line from the $ifconfig_xxN variable or the
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# /etc/ifconfig.xxN file, we ignore comments and blank lines,
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# treat lines beginning with "!" as commands to execute, treat
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# "dhcp" as a special case to invoke dhcpcd, and for any other
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# line we run "ifconfig xxN", using each line of the file as the
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# arguments for a separate "ifconfig" invocation.
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#
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# In order to configure an interface reasonably, you at the very least
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# need to specify "[addr_family] [hostname]" (e.g "inet my.domain.org"),
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# and probably a netmask (as in "netmask 0xffffffe0"). You will
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# frequently need to specify a media type, as in "media UTP", for
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# interface cards with multiple media connections that do not
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# autoconfigure. See the ifconfig manual page for details.
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#
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# Note that /etc/ifconfig.xxN takes multiple lines. The following
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# configuration is possible:
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# inet 10.1.1.1 netmask 0xffffff00
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# inet 10.1.1.2 netmask 0xffffff00 alias
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# inet6 2001:db8::1 prefixlen 64 alias
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#
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# You can put shell script fragment into /etc/ifconfig.xxN by
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# starting a line with "!". Refer to ifconfig.if(5) for details.
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#
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if [ "$net_interfaces" != NO ]; then
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if checkyesno auto_ifconfig; then
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tmp=$(/sbin/ifconfig -l)
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for cloner in $(/sbin/ifconfig -C 2>/dev/null); do
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for int in /etc/ifconfig.${cloner}[0-9]*; do
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[ ! -f $int ] && break
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tmp="$tmp ${int##*.}"
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done
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done
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else
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tmp="$net_interfaces"
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fi
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echo -n 'Configuring network interfaces:'
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for int in $tmp; do
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eval argslist=\$ifconfig_$int
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# Skip interfaces that do not have explicit
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# configuration information. If auto_ifconfig is
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# false then also warn about such interfaces.
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#
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if [ -z "$argslist" ] && ! [ -f /etc/ifconfig.$int ]
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then
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if ! checkyesno auto_ifconfig; then
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echo
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warn \
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"/etc/ifconfig.$int missing and ifconfig_$int not set;"
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warn "interface $int not configured."
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fi
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continue
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fi
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echo -n " $int"
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# Create the interface if necessary.
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# If the interface did not exist before,
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# then also resync ipf(4).
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#
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if /sbin/ifconfig $int create 2>/dev/null && \
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checkyesno ipfilter; then
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/sbin/ipf -y >/dev/null
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fi
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# If $ifconfig_xxN is empty, then use
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# /etc/ifconfig.xxN, which we know exists due to
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# an earlier test.
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#
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# If $ifconfig_xxN is non-empty and contains a
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# newline, then just use it as is. (This allows
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# semicolons through unmolested.)
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#
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# If $ifconfig_xxN is non-empty and does not
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# contain a newline, then convert all semicolons
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# to newlines.
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#
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case "$argslist" in
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'')
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cat /etc/ifconfig.$int
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;;
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*"${nl}"*)
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echo "$argslist"
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;;
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*)
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(
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set -o noglob
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IFS=';'; set -- $argslist
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#echo >&2 "[$#] [$1] [$2] [$3] [$4]"
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IFS="$nl"; echo "$*"
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)
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;;
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esac |
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while read -r args; do
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case "$args" in
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''|"#"*|create)
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;;
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"!"*)
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# Run arbitrary command in a subshell.
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( eval "${args#*!}" )
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;;
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dhcp)
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if ! checkyesno dhcpcd; then
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/sbin/dhcpcd -n \
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${dhcpcd_flags} $int
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fi
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;;
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*)
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# Pass args to ifconfig. Note
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# that args may contain embedded
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# shell metacharacters, such as
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# "ssid 'foo;*>bar'". We eval
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# one more time so that things
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# like ssid "Columbia University" work.
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(
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set -o noglob
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eval set -- $args
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#echo >&2 "[$#] [$1] [$2] [$3]"
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/sbin/ifconfig $int "$@"
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)
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;;
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esac
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done
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configured_interfaces="$configured_interfaces $int"
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done
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echo "."
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fi
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echo -n "Adding interface aliases:"
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# Check if each configured interface xxN has an $ifaliases_xxN variable
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# associated, then configure additional IP addresses for that interface.
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# The variable contains a list of "address netmask" pairs, with
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# "netmask" set to "-" if the interface default netmask is to be used.
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#
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# Note that $ifaliases_xxN works only in certain cases and its
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# use is not recommended. Use /etc/ifconfig.xxN or multiple
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# commands in $ifconfig_xxN instead.
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#
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for int in lo0 $configured_interfaces; do
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eval args=\$ifaliases_$int
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if [ -n "$args" ]; then
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set -- $args
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while [ $# -ge 2 ]; do
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addr=$1 ; net=$2 ; shift 2
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if [ "$net" = "-" ]; then
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# for compatibility only, obsolete
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/sbin/ifconfig $int inet alias $addr
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else
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/sbin/ifconfig $int inet alias $addr \
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netmask $net
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fi
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echo -n " $int:$addr"
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done
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fi
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done
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# /etc/ifaliases, if it exists, contains the names of additional IP
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# addresses for each interface. It is formatted as a series of lines
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# that contain
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# address interface netmask
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#
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# Note that /etc/ifaliases works only in certain cases and its
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# use is not recommended. Use /etc/ifconfig.xxN or multiple
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# commands in $ifconfig_xxN instead.
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#
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if [ -f /etc/ifaliases ]; then
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while read addr int net; do
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if [ -z "$net" ]; then
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# for compatibility only, obsolete
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/sbin/ifconfig $int inet alias $addr
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else
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/sbin/ifconfig $int inet alias $addr netmask $net
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fi
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done < /etc/ifaliases
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fi
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echo "." # for "Adding interface aliases:"
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# Check $defaultroute, then /etc/mygate, for the name or address
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# of my IPv4 gateway host. If using a name, that name must be in
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# /etc/hosts.
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#
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if [ -z "$defaultroute" ] && [ -f /etc/mygate ]; then
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defaultroute=$(cat /etc/mygate)
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fi
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if [ -n "$defaultroute" ]; then
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/sbin/route add default $defaultroute
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fi
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# Check $defaultroute6, then /etc/mygate6, for the name or address
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# of my IPv6 gateway host. If using a name, that name must be in
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# /etc/hosts. Note that the gateway host address must be a link-local
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# address if it is not using an stf* interface.
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#
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if [ -z "$defaultroute6" ] && [ -f /etc/mygate6 ]; then
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defaultroute6=$(cat /etc/mygate6)
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fi
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if [ -n "$defaultroute6" ]; then
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if [ "$ip6mode" = "autohost" ]; then
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echo
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warn \
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"ip6mode is set to 'autohost' and a v6 default route is also set."
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fi
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/sbin/route add -inet6 default $defaultroute6
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fi
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# IPv6 interface autoconfiguration.
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#
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if /sbin/ifconfig lo0 inet6 >/dev/null 2>&1; then
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# wait till DAD is completed. always invoke it in case
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# if are configured manually by ifconfig
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#
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dadcount=$(/sbin/sysctl -n net.inet6.ip6.dad_count 2>/dev/null)
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sleep $dadcount
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sleep 1
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if checkyesno rtsol; then
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if [ "$ip6mode" = "autohost" ]; then
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echo 'Sending router solicitation...'
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/sbin/rtsol $rtsol_flags
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else
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echo
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warn \
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"ip6mode must be set to 'autohost' to use rtsol."
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fi
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# wait till DAD is completed, for global addresses
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# configured by router advert message.
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#
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sleep $dadcount
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sleep 1
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fi
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fi
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# XXX this must die
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if [ -s /etc/netstart.local ]; then
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sh /etc/netstart.local start
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fi
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}
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network_stop()
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{
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echo "Stopping network."
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# XXX this must die
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if [ -s /etc/netstart.local ]; then
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sh /etc/netstart.local stop
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fi
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echo "Deleting aliases."
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if [ -f /etc/ifaliases ]; then
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while read addr int net; do
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/sbin/ifconfig $int inet delete $addr
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done < /etc/ifaliases
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fi
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for int in $(/sbin/ifconfig -lu); do
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eval args=\$ifaliases_$int
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if [ -n "$args" ]; then
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set -- $args
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while [ $# -ge 2 ]; do
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addr=$1 ; net=$2 ; shift 2
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/sbin/ifconfig $int inet delete $addr
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done
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fi
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done
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# down interfaces
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#
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echo -n 'Downing network interfaces:'
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if [ "$net_interfaces" != NO ]; then
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if checkyesno auto_ifconfig; then
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tmp=$(/sbin/ifconfig -l)
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else
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tmp="$net_interfaces"
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fi
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for int in $tmp; do
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eval args=\$ifconfig_$int
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if [ -n "$args" ] || [ -f /etc/ifconfig.$int ]; then
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echo -n " $int"
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if [ -f /var/run/dhcpcd-$int.pid ]; then
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/sbin/dhcpcd -k $int 2> /dev/null
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fi
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/sbin/ifconfig $int down
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if /sbin/ifconfig $int destroy 2>/dev/null && \
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checkyesno ipfilter; then
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# resync ipf(4)
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/sbin/ipf -y >/dev/null
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fi
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fi
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done
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echo "."
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fi
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# flush routes
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#
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/sbin/route -qn flush
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}
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load_rc_config $name
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load_rc_config_var dhclient dhclient
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load_rc_config_var dhcpcd dhcpcd
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load_rc_config_var ipfilter ipfilter
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run_rc_command "$1"
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