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#!/bin/sh -
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#
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# $OpenBSD: netstart,v 1.102 2005/01/04 15:40:53 mcbride Exp $
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# Strip comments (and leading/trailing whitespace if IFS is set)
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# from a file and spew to stdout
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stripcom() {
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local _file="$1"
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local _line
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{
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while read _line ; do
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_line=${_line%%#*} # strip comments
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test -z "$_line" && continue
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echo $_line
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done
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} < $_file
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}
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# Returns true if $1 contains only alphanumerics
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isalphanumeric() {
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local _n
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_n=$1
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while [ ${#_n} != 0 ]; do
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case $_n in
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[A-Za-z0-9]*) ;;
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*) return 1;;
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esac
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_n=${_n#?}
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done
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return 0
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}
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# Start the $1 interface
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ifstart() {
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if=$1
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# Interface names must be alphanumeric only. We check to avoid
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# configuring backup or temp files, and to catch the "*" case.
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if ! isalphanumeric "$if"; then
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return
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fi
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ifconfig $if > /dev/null 2>&1
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if [ "$?" != "0" ]; then
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# Try to create interface if it does not exist
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ifconfig $if create > /dev/null 2>&1
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if [ "$?" != "0" ]; then
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return
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fi
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fi
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# Now parse the hostname.* file
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while :; do
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if [ "$cmd2" ]; then
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# We are carrying over from the 'read dt dtaddr'
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# last time.
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set -- $cmd2
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af="$1" name="$2" mask="$3" bcaddr="$4" ext1="$5" cmd2=
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# Make sure and get any remaining args in ext2,
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# like the read below
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i=1
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while [ i -lt 6 -a -n "$1" ]; do shift; let i=i+1; done
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ext2="$@"
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else
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# Read the next line or exit the while loop.
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read af name mask bcaddr ext1 ext2 || break
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fi
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# $af can be "dhcp", "up", "rtsol", an address family,
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# commands, or a comment.
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case "$af" in
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"#"*|"") # skip comments and empty lines
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continue
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;;
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"!"*) # parse commands
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cmd="${af#*!} ${name} ${mask} ${bcaddr} ${ext1} ${ext2}"
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;;
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"bridge")
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cmd="echo /etc/hostname.$if: bridges now supported via bridgename.* files"
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;;
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"dhcp")
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[ "$name" = "NONE" ] && name=
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[ "$mask" = "NONE" ] && mask=
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[ "$bcaddr" = "NONE" ] && bcaddr=
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ifconfig $if $name $mask $bcaddr $ext1 $ext2 down
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cmd="dhclient $if"
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;;
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"rtsol")
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ifconfig $if $name $mask $bcaddr $ext1 $ext2 up
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rtsolif="$rtsolif $if"
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cmd=
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;;
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"up")
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# The only one of these guaranteed to be set is $if.
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# The remaining ones exist so that media controls work.
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cmd="ifconfig $if $name $mask $bcaddr $ext1 $ext2 up"
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;;
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*)
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read dt dtaddr
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if [ "$name" = "alias" ]; then
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# perform a 'shift' of sorts
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alias=$name
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name=$mask
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mask=$bcaddr
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bcaddr=$ext1
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ext1=$ext2
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ext2=
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else
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alias=
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fi
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cmd="ifconfig $if $af $alias $name "
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case "$dt" in
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dest)
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cmd="$cmd $dtaddr"
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;;
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[a-z!]*)
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cmd2="$dt $dtaddr"
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;;
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esac
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if [ ! -n "$name" ]; then
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echo "/etc/hostname.$if: invalid network configuration file"
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return
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fi
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case $af in
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inet)
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[ "$mask" ] && cmd="$cmd netmask $mask"
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if [ "$bcaddr" -a "X$bcaddr" != "XNONE" ]; then
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cmd="$cmd broadcast $bcaddr"
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fi
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[ "$alias" ] && rtcmd=";route -qn add -host $name 127.0.0.1"
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;;
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inet6) [ "$mask" ] && cmd="$cmd prefixlen $mask"
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cmd="$cmd $bcaddr"
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;;
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*)
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cmd="$cmd $mask $bcaddr"
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;;
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esac
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cmd="$cmd $ext1 $ext2$rtcmd" rtcmd=
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;;
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esac
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eval "$cmd"
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done < /etc/hostname.$if
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}
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# Start the $1 bridge
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bridgestart() {
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# Interface names must be alphanumeric only. We check to avoid
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# configuring backup or temp files, and to catch the "*" case.
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if ! isalphanumeric "$1"; then
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return
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fi
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brconfig $1 > /dev/null 2>&1
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if [ "$?" != "0" ]; then
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# Try to create interface if it does not exist
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ifconfig $if create > /dev/null 2>&1
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if [ "$?" != "0" ]; then
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return
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fi
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fi
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# Now parse the bridgename.* file
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# All lines are run as brconfig(8) commands.
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while read line ; do
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line=${line%%#*} # strip comments
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test -z "$line" && continue
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case "$line" in
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"!"*)
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cmd="${line#*!}"
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;;
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*)
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cmd="brconfig $1 $line"
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;;
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esac
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eval "$cmd"
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done < /etc/bridgename.$1
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}
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# Re-read /etc/rc.conf
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. /etc/rc.conf
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# If we were invoked with a list of interface names, just reconfigure these
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# interfaces (or bridges) and return.
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if [ $1x = autobootx ]; then
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shift
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fi
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if [ $# -gt 0 ]; then
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while [ $# -gt 0 ]; do
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if [ -f /etc/bridgename.$1 ]; then
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bridgestart $1
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else
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ifstart $1
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fi
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shift
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done
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return
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fi
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# Otherwise, process with the complete network initialization.
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# /etc/myname contains my symbolic name
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if [ -f /etc/myname ]; then
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hostname=`stripcom /etc/myname`
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hostname $hostname
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else
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hostname=`hostname`
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fi
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if [ -f /etc/defaultdomain ]; then
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domainname `stripcom /etc/defaultdomain`
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fi
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# Set the address for the loopback interface. Bringing the
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# interface up, automatically invokes the IPv6 address ::1)
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ifconfig lo0 inet 127.0.0.1
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if ifconfig lo0 inet6 >/dev/null 2>&1; then
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# IPv6 configurations.
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ip6kernel=YES
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# Disallow link-local unicast dest without outgoing scope identifiers.
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route -qn add -inet6 fe80:: -prefixlen 10 ::1 -reject > /dev/null
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# Disallow site-local unicast dest without outgoing scope identifiers.
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# If you configure site-locals without scope id (it is permissible
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# config for routers that are not on scope boundary), you may want
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# to comment the line out.
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route -qn add -inet6 fec0:: -prefixlen 10 ::1 -reject > /dev/null
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# Disallow "internal" addresses to appear on the wire.
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route -qn add -inet6 ::ffff:0.0.0.0 -prefixlen 96 ::1 -reject > /dev/null
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# Disallow packets to malicious IPv4 compatible prefix.
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route -qn add -inet6 ::224.0.0.0 -prefixlen 100 ::1 -reject > /dev/null
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route -qn add -inet6 ::127.0.0.0 -prefixlen 104 ::1 -reject > /dev/null
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route -qn add -inet6 ::0.0.0.0 -prefixlen 104 ::1 -reject > /dev/null
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route -qn add -inet6 ::255.0.0.0 -prefixlen 104 ::1 -reject > /dev/null
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# Disallow packets to malicious 6to4 prefix.
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route -qn add -inet6 2002:e000:: -prefixlen 20 ::1 -reject > /dev/null
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route -qn add -inet6 2002:7f00:: -prefixlen 24 ::1 -reject > /dev/null
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route -qn add -inet6 2002:0000:: -prefixlen 24 ::1 -reject > /dev/null
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route -qn add -inet6 2002:ff00:: -prefixlen 24 ::1 -reject > /dev/null
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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 compatible
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# support. Under RFC1933, it should transmit native IPv6
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# packets toward IPv4 compatible destination, hoping it would
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# reach a router that forwards the packet toward auto-tunnel
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# interface.
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# (2) An IPv6-only node originates a packet to an 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 addresses, and security issues
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# with it, we disable it by default.
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route -qn add -inet6 ::0.0.0.0 -prefixlen 96 ::1 -reject > /dev/null
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rtsolif=""
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else
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ip6kernel=NO
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fi
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# Configure all the non-loopback interfaces which we know about.
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# Refer to hostname.if(5) and bridgename.if(5)
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for hn in /etc/hostname.*; do
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# Strip off /etc/hostname. prefix
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if=${hn#/etc/hostname.}
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test "$if" = "*" && continue
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case $if in
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"carp"*|"gif"*|"gre"*|"pfsync"*)
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# CARP, GIF, GRE and PFSYNC interfaces need the routes to be setup
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# before they are configured.
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continue
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;;
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*)
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ifstart $if
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;;
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esac
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done
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if [ "$ip6kernel" = "YES" -a "x$rtsolif" != "x" ]; then
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fw=`sysctl -n net.inet6.ip6.forwarding`
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ra=`sysctl -n net.inet6.ip6.accept_rtadv`
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if [ "x$fw" = "x0" -a "x$ra" = "x1" ]; then
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echo "IPv6 autoconf:$rtsolif"
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rtsol $rtsolif
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else
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echo "WARNING: inconsistent config - check /etc/sysctl.conf for IPv6 autoconf"
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fi
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fi
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if [ "$ip6kernel" = "YES" ]; then
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# this is to make sure DAD is completed before going further.
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sleep `sysctl -n net.inet6.ip6.dad_count`
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fi
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# The pfsync interface needs to come up before carp.
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if [ -f /etc/hostname.pfsync0 ]; then
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ifstart pfsync0
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fi
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# Configure all the carp interfaces which we know about.
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# They must come up after pfsync but before default route.
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for hn in /etc/hostname.*; do
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# Strip off /etc/hostname. prefix
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if=${hn#/etc/hostname.}
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test "$if" = "*" && continue
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case $if in
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"carp"*)
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ifstart $if
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;;
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*)
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# Regular interfaces have already been configured.
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continue
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;;
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esac
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done
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# /etc/mygate, if it exists, contains the name of my gateway host
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# that name must be in /etc/hosts.
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if [ -f /etc/mygate ]; then
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route -qn delete default > /dev/null 2>&1
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route -qn add -host default `stripcom /etc/mygate`
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fi
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# Multicast routing.
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#
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# The routing to the 224.0.0.0/4 net is setup according to these rules:
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# multicast_host multicast_router route comment
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# NO NO -reject no multicast
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# NO YES none installed daemon will run
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# YES/interface NO -interface YES=def. iface
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# Any other combination -reject config error
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case "$multicast_host:$multicast_router" in
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NO:NO)
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route -qn add -net 224.0.0.0/4 -interface 127.0.0.1 -reject > /dev/null
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;;
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NO:YES)
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;;
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*:NO)
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set `if [ $multicast_host = YES ]; then
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ed -s '!route -qn show -inet' <<EOF
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/^default/p
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EOF
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else
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ed -s "!ifconfig $multicast_host" <<EOF
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/^ inet /p
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EOF
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fi`
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route -qn add -net 224.0.0.0/4 -interface $2 > /dev/null
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;;
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*:*)
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echo 'config error, multicasting disabled until rc.conf is fixed'
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route -qn add -net 224.0.0.0/4 -interface 127.0.0.1 -reject > /dev/null
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;;
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esac
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# Configure all the gif and gre interfaces which we know about.
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# They were delayed because they require the routes to be set.
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for hn in /etc/hostname.*; do
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# Strip off /etc/hostname. prefix
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if=${hn#/etc/hostname.}
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test "$if" = "*" && continue
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case $if in
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"gif"*|"gre"*)
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ifstart $if
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;;
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*)
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# Regular interfaces have already been configured.
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continue
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;;
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esac
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done
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# reject 127/8 other than 127.0.0.1
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route -qn add -net 127 127.0.0.1 -reject > /dev/null
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# Configure all the bridges.
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for bn in /etc/bridgename.*; do
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# Strip off /etc/bridgename. prefix
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if=${bn#/etc/bridgename.}
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test "$if" = "*" && continue
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bridgestart $if
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done
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