NetBSD/etc/rc.d/network

546 lines
13 KiB
Bash
Executable File

#!/bin/sh
#
# $NetBSD: network,v 1.71 2016/03/06 18:50:06 christos Exp $
#
# PROVIDE: network
# REQUIRE: ipfilter ipsec mountcritlocal root tty sysctl
# BEFORE: NETWORKING
$_rc_subr_loaded . /etc/rc.subr
name="network"
start_cmd="network_start"
stop_cmd="network_stop"
nl='
' # a newline
intmissing()
{
local int="$1"
shift
for i; do
if [ "$int" = "$i" ]; then
return 1
fi
done
return 0
}
have_inet6()
{
/sbin/ifconfig lo0 inet6 >/dev/null 2>&1
}
network_start()
{
# set hostname, turn on network
#
echo "Starting network."
network_start_hostname
network_start_domainname
network_start_loopback
have_inet6 &&
network_start_ipv6_route
[ "$net_interfaces" != NO ] &&
network_start_interfaces
network_start_aliases
network_start_defaultroute
network_start_defaultroute6
have_inet6 &&
network_start_ipv6_autoconf
network_wait_dad
network_start_local
}
network_start_hostname()
{
# If $hostname is set, use it for my Internet name,
# otherwise use /etc/myname
#
if [ -z "$hostname" ] && [ -f /etc/myname ]; then
hostname=$(kat /etc/myname)
fi
if [ -n "$hostname" ]; then
echo "Hostname: $hostname"
hostname $hostname
else
# Don't warn about it if we're going to run
# DHCP later, as we will probably get the
# hostname at that time.
#
if ! checkyesno dhclient && ! checkyesno dhcpcd && \
[ -z "$(hostname)" ]
then
warn "\$hostname not set."
fi
fi
}
network_start_domainname()
{
# Check $domainname first, then /etc/defaultdomain,
# for NIS/YP domain name
#
if [ -z "$domainname" ] && [ -f /etc/defaultdomain ]; then
domainname=$(kat /etc/defaultdomain)
fi
if [ -n "$domainname" ]; then
echo "NIS domainname: $domainname"
domainname $domainname
fi
# Flush all routes just to make sure it is clean
if checkyesno flushroutes; then
/sbin/route -qn flush
fi
}
network_start_loopback()
{
# Set the address for the first loopback interface, so that the
# auto-route from a newly configured interface's address to lo0
# works correctly.
#
# NOTE: obscure networking problems will occur if lo0 isn't configured.
#
/sbin/ifconfig lo0 inet 127.0.0.1
# According to RFC1122, 127.0.0.0/8 must not leave the node.
#
/sbin/route -q add -inet 127.0.0.0 -netmask 0xff000000 127.0.0.1 -reject
}
network_start_ipv6_route()
{
# IPv6 routing setups, and host/router mode selection.
#
# We have IPv6 support in kernel.
# disallow link-local unicast dest without outgoing scope
# identifiers.
#
/sbin/route -q add -inet6 fe80:: -prefixlen 10 ::1 -reject
# disallow the use of the RFC3849 documentation address
#
/sbin/route -q add -inet6 2001:db8:: -prefixlen 32 ::1 -reject
# IPv6 site-local scoped address prefix (fec0::/10)
# has been deprecated by RFC3879.
#
if [ -n "$ip6sitelocal" ]; then
warn "\$ip6sitelocal is no longer valid"
fi
# disallow "internal" addresses to appear on the wire.
#
/sbin/route -q add -inet6 ::ffff:0.0.0.0 -prefixlen 96 ::1 -reject
# disallow packets to malicious IPv4 compatible prefix
#
/sbin/route -q add -inet6 ::224.0.0.0 -prefixlen 100 ::1 -reject
/sbin/route -q add -inet6 ::127.0.0.0 -prefixlen 104 ::1 -reject
/sbin/route -q add -inet6 ::0.0.0.0 -prefixlen 104 ::1 -reject
/sbin/route -q add -inet6 ::255.0.0.0 -prefixlen 104 ::1 -reject
# disallow packets to malicious 6to4 prefix
#
/sbin/route -q add -inet6 2002:e000:: -prefixlen 20 ::1 -reject
/sbin/route -q add -inet6 2002:7f00:: -prefixlen 24 ::1 -reject
/sbin/route -q add -inet6 2002:0000:: -prefixlen 24 ::1 -reject
/sbin/route -q add -inet6 2002:ff00:: -prefixlen 24 ::1 -reject
# Completely disallow packets to IPv4 compatible prefix.
# This may conflict with RFC1933 under following circumstances:
# (1) An IPv6-only KAME node tries to originate packets to IPv4
# compatible destination. The KAME node has no IPv4
# compatible support. Under RFC1933, it should transmit
# native IPv6 packets toward IPv4 compatible destination,
# hoping it would reach a router that forwards the packet
# toward auto-tunnel interface.
# (2) An IPv6-only node originates a packet to IPv4 compatible
# destination. A KAME node is acting as an IPv6 router, and
# asked to forward it.
# Due to rare use of IPv4 compatible address, and security
# issues with it, we disable it by default.
#
/sbin/route -q add -inet6 ::0.0.0.0 -prefixlen 96 ::1 -reject
/sbin/sysctl -qw net.inet6.ip6.forwarding=0
/sbin/sysctl -qw net.inet6.ip6.accept_rtadv=0
case $ip6mode in
router)
echo 'IPv6 mode: router'
/sbin/sysctl -qw net.inet6.ip6.forwarding=1
# disallow unique-local unicast forwarding without
# explicit configuration.
if ! checkyesno ip6uniquelocal; then
/sbin/route -q add -inet6 fc00:: -prefixlen 7 \
::1 -reject
fi
;;
autohost)
echo 'IPv6 mode: autoconfigured host'
/sbin/sysctl -qw net.inet6.ip6.accept_rtadv=1
;;
host)
echo 'IPv6 mode: host'
;;
*) warn "invalid \$ip6mode value "\"$ip6mode\"
;;
esac
}
network_start_interfaces()
{
# Configure all of the network interfaces listed in $net_interfaces;
# if $auto_ifconfig is YES, grab all interfaces from ifconfig.
# In the following, "xxN" stands in for interface names, like "le0".
#
# For any interfaces that has an $ifconfig_xxN variable
# associated, we break it into lines using ';' as a separator,
# then process it just like the contents of an /etc/ifconfig.xxN
# file.
#
# For each line from the $ifconfig_xxN variable or the
# /etc/ifconfig.xxN file, we ignore comments and blank lines,
# treat lines beginning with "!" as commands to execute, treat
# "dhcp" as a special case to invoke dhcpcd, and for any other
# line we run "ifconfig xxN", using each line of the file as the
# arguments for a separate "ifconfig" invocation.
#
# In order to configure an interface reasonably, you at the very least
# need to specify "[addr_family] [hostname]" (e.g "inet my.domain.org"),
# and probably a netmask (as in "netmask 0xffffffe0"). You will
# frequently need to specify a media type, as in "media UTP", for
# interface cards with multiple media connections that do not
# autoconfigure. See the ifconfig manual page for details.
#
# Note that /etc/ifconfig.xxN takes multiple lines. The following
# configuration is possible:
# inet 10.1.1.1 netmask 0xffffff00
# inet 10.1.1.2 netmask 0xffffff00 alias
# inet6 2001:db8::1 prefixlen 64 alias
#
# You can put shell script fragment into /etc/ifconfig.xxN by
# starting a line with "!". Refer to ifconfig.if(5) for details.
#
ifaces="$(/sbin/ifconfig -l)"
if checkyesno auto_ifconfig; then
tmp="$ifaces"
for cloner in $(/sbin/ifconfig -C); do
for int in /etc/ifconfig.${cloner}[0-9]*; do
[ ! -f $int ] && break
tmp="$tmp ${int##*.}"
done
done
else
tmp="$net_interfaces"
fi
echo -n 'Configuring network interfaces:'
for int in $tmp; do
eval argslist=\$ifconfig_$int
# Skip interfaces that do not have explicit
# configuration information. If auto_ifconfig is
# false then also warn about such interfaces.
#
if [ -z "$argslist" ] && ! [ -f /etc/ifconfig.$int ]
then
if ! checkyesno auto_ifconfig; then
echo
warn \
"/etc/ifconfig.$int missing and ifconfig_$int not set;"
warn "interface $int not configured."
fi
continue
fi
echo -n " $int"
# Create the interface if necessary.
# If the interface did not exist before,
# then also resync ipf(4).
#
if intmissing $int $ifaces; then
if /sbin/ifconfig $int create && \
checkyesno ipfilter; then
/sbin/ipf -y >/dev/null
fi
fi
# If $ifconfig_xxN is empty, then use
# /etc/ifconfig.xxN, which we know exists due to
# an earlier test.
#
# If $ifconfig_xxN is non-empty and contains a
# newline, then just use it as is. (This allows
# semicolons through unmolested.)
#
# If $ifconfig_xxN is non-empty and does not
# contain a newline, then convert all semicolons
# to newlines.
#
case "$argslist" in
'')
cat /etc/ifconfig.$int
;;
*"${nl}"*)
echo "$argslist"
;;
*)
(
set -o noglob
IFS=';'; set -- $argslist
#echo >&2 "[$#] [$1] [$2] [$3] [$4]"
IFS="$nl"; echo "$*"
)
;;
esac |
collapse_backslash_newline |
while read -r args; do
case "$args" in
''|"#"*|create)
;;
"!"*)
# Run arbitrary command in a subshell.
( eval "${args#*!}" )
;;
dhcp)
if ! checkyesno dhcpcd; then
/sbin/dhcpcd -n \
${dhcpcd_flags} $int
fi
;;
*)
# Pass args to ifconfig. Note
# that args may contain embedded
# shell metacharacters, such as
# "ssid 'foo;*>bar'". We eval
# one more time so that things
# like ssid "Columbia University" work.
(
set -o noglob
eval set -- $args
#echo >&2 "[$#] [$1] [$2] [$3]"
/sbin/ifconfig $int "$@"
)
;;
esac
done
configured_interfaces="$configured_interfaces $int"
done
echo "."
}
network_start_aliases()
{
echo -n "Adding interface aliases:"
# Check if each configured interface xxN has an $ifaliases_xxN variable
# associated, then configure additional IP addresses for that interface.
# The variable contains a list of "address netmask" pairs, with
# "netmask" set to "-" if the interface default netmask is to be used.
#
# Note that $ifaliases_xxN works only in certain cases and its
# use is not recommended. Use /etc/ifconfig.xxN or multiple
# commands in $ifconfig_xxN instead.
#
for int in lo0 $configured_interfaces; do
eval args=\$ifaliases_$int
if [ -n "$args" ]; then
set -- $args
while [ $# -ge 2 ]; do
addr=$1 ; net=$2 ; shift 2
if [ "$net" = "-" ]; then
# for compatibility only, obsolete
/sbin/ifconfig $int inet alias $addr
else
/sbin/ifconfig $int inet alias $addr \
netmask $net
fi
echo -n " $int:$addr"
done
fi
done
# /etc/ifaliases, if it exists, contains the names of additional IP
# addresses for each interface. It is formatted as a series of lines
# that contain
# address interface netmask
#
# Note that /etc/ifaliases works only in certain cases and its
# use is not recommended. Use /etc/ifconfig.xxN or multiple
# commands in $ifconfig_xxN instead.
#
if [ -f /etc/ifaliases ]; then
while read addr int net; do
if [ -z "$net" ]; then
# for compatibility only, obsolete
/sbin/ifconfig $int inet alias $addr
else
/sbin/ifconfig $int inet alias $addr netmask $net
fi
done < /etc/ifaliases
fi
echo "." # for "Adding interface aliases:"
}
network_start_defaultroute()
{
# Check $defaultroute, then /etc/mygate, for the name or address
# of my IPv4 gateway host. If using a name, that name must be in
# /etc/hosts.
#
if [ -z "$defaultroute" ] && [ -f /etc/mygate ]; then
defaultroute=$(kat /etc/mygate)
fi
if [ -n "$defaultroute" ]; then
/sbin/route add default $defaultroute
fi
}
network_start_defaultroute6()
{
# Check $defaultroute6, then /etc/mygate6, for the name or address
# of my IPv6 gateway host. If using a name, that name must be in
# /etc/hosts. Note that the gateway host address must be a link-local
# address if it is not using an stf* interface.
#
if [ -z "$defaultroute6" ] && [ -f /etc/mygate6 ]; then
defaultroute6=$(kat /etc/mygate6)
fi
if [ -n "$defaultroute6" ]; then
if [ "$ip6mode" = "autohost" ]; then
echo
warn \
"ip6mode is set to 'autohost' and a v6 default route is also set."
fi
/sbin/route add -inet6 default $defaultroute6
fi
}
network_start_ipv6_autoconf()
{
# IPv6 interface autoconfiguration.
# dhcpcd will ensure DAD completes before forking
if checkyesnox rtsol && ! checkyesno dhcpcd; then
if [ "$ip6mode" = "autohost" ]; then
echo
warn "rtsol has been removed, " \
"please configure dhcpcd in its place."
fi
fi
}
network_wait_dad()
{
# Wait for the DAD flags to clear form all addresses.
if [ -n "$ifconfig_wait_dad_flags" ]; then
echo 'Waiting for DAD to complete for' \
'statically configured addresses...'
ifconfig $ifconfig_wait_dad_flags
fi
}
network_start_local()
{
# XXX this must die
if [ -s /etc/netstart.local ]; then
sh /etc/netstart.local start
fi
}
network_stop()
{
echo "Stopping network."
network_stop_local
network_stop_aliases
[ "$net_interfaces" != NO ] &&
network_stop_interfaces
network_stop_route
}
network_stop_local()
{
# XXX this must die
if [ -s /etc/netstart.local ]; then
sh /etc/netstart.local stop
fi
}
network_stop_aliases()
{
echo "Deleting aliases."
if [ -f /etc/ifaliases ]; then
while read addr int net; do
/sbin/ifconfig $int inet delete $addr
done < /etc/ifaliases
fi
for int in $(/sbin/ifconfig -lu); do
eval args=\$ifaliases_$int
if [ -n "$args" ]; then
set -- $args
while [ $# -ge 2 ]; do
addr=$1 ; net=$2 ; shift 2
/sbin/ifconfig $int inet delete $addr
done
fi
done
}
network_stop_interfaces()
{
# down interfaces
#
echo -n 'Downing network interfaces:'
if checkyesno auto_ifconfig; then
tmp=$(/sbin/ifconfig -l)
else
tmp="$net_interfaces"
fi
for int in $tmp; do
eval args=\$ifconfig_$int
if [ -n "$args" ] || [ -f /etc/ifconfig.$int ]; then
echo -n " $int"
if [ -f /var/run/dhcpcd-$int.pid ]; then
/sbin/dhcpcd -k $int 2> /dev/null
fi
/sbin/ifconfig $int down
if /sbin/ifconfig $int destroy 2>/dev/null && \
checkyesno ipfilter; then
# resync ipf(4)
/sbin/ipf -y >/dev/null
fi
fi
done
echo "."
}
network_stop_route()
{
# flush routes
#
/sbin/route -qn flush
}
load_rc_config $name
load_rc_config_var dhclient dhclient
load_rc_config_var dhcpcd dhcpcd
load_rc_config_var ipfilter ipfilter
run_rc_command "$1"