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|
#!/bin/sh -
#
# $OpenBSD: netstart,v 1.48 1999/03/29 22:09:58 niklas Exp $
# Returns true if $1 contains only alphanumerics
isalphanumeric() {
local _n
_n=$1
while [ ${#_n} != 0 ]; do
case $_n in
[A-Za-z0-9]*) ;;
*) return 1;;
esac
_n=${_n#?}
done
return 0
}
# /etc/myname contains my symbolic name
#
hostname=`cat /etc/myname`
hostname $hostname
if [ -f /etc/defaultdomain ]; then
domainname `cat /etc/defaultdomain`
fi
# pick up option configuration
. /etc/rc.conf
# Configure the IP filter before configuring network interfaces
if [ X"${ipfilter}" = X"YES" -a -f "${ipfilter_rules}" ]; then
echo 'configuring IP filter'
ipf -Fa -f ${ipfilter_rules} -E
else
ipfilter=NO
fi
# set the address for the loopback interface
ifconfig lo0 inet localhost
# use loopback, not the wire
route -n add -host $hostname localhost
route -n add -net 127 127.0.0.1 -reject
# configure all of the non-loopback interfaces which we know about.
# do this by reading /etc/hostname.* files, where * is the name
# of a given interface.
#
# these files are formatted like the following, but with no # at the
# beginning of the line
#
# addr_family hostname netmask broadcast_addr options
# dest dest_addr
#
# OR
#
# dhcp
#
# OR
#
# bridge
# brconfig-arguments [ several lines if needed ]
#
# addr_family is the address family of the interface, generally inet
# hostname is the host name that belongs to the interface, in /etc/hosts.
# netmask is the network mask for the interface.
# broadcast_addr is the broadcast address for the interface
# options are misc. options to ifconfig for the interface.
#
# dest is simply the string "dest" (no quotes, though) if the interface
# has a "destination" (i.e. it's a point-to-point link, like SLIP).
# dest_addr is the hostname of the other end of the link, in /etc/hosts
#
# the only required contents of the file in this mode are the addr_family field
# and the hostname.
#
# dhcp is simply the string "dhcp" (no quotes, though) if the interface
# is to be configured using DHCP. See dhclient(8) and dhclient.conf(5)
# for details.
#
# bridge is the string "bridge" (still no quotes). Bridge interfaces
# are just configured "up" and then brconfig(8) is called for each
# line of arguments following this first line.
for hn in /etc/hostname.*; do
# Strip off /etc/hostname. prefix
if=${hn#/etc/hostname.}
# Interface names must be alphanumeric only. We check to avoid
# configuring backup or temp files, and to catch the "*" case.
if ! isalphanumeric "$if"; then
continue
fi
# Now parse the hostname.* file
{
read af name mask bcaddr extras
# $af can be either "bridge", "dhcp", "up" or an address family.
case "$af" in
"bridge")
ifconfig $if up
cmd=`sed "s/\(.*\)/brconfig $if \1;/"`
;;
"dhcp")
ifconfig $if $extras down
cmd="/sbin/dhclient $if"
;;
"up")
# The only one of these guaranteed to be set is $if
cmd="ifconfig $if $name $mask $bcaddr $extras up"
;;
*)
read dt dtaddr
if [ ! -n "$name" ]; then
echo "/etc/hostname.$if: invalid network configuration file"
exit
fi
cmd="ifconfig $if $af $name "
if [ "${dt}" = "dest" ]; then cmd="$cmd $dtaddr"; fi
if [ -n "$mask" ]; then cmd="$cmd netmask $mask"; fi
if [ -n "$bcaddr" -a "X$bcaddr" != "XNONE" ]; then
cmd="$cmd broadcast $bcaddr";
fi
cmd="$cmd $extras";
;;
esac
eval "$cmd"
} < /etc/hostname.$if
done
# /etc/mygate, if it exists, contains the name of my gateway host
# that name must be in /etc/hosts.
if [ -f /etc/mygate ]; then
route -n add -host default `cat /etc/mygate`
fi
# Multicast routing.
#
# The routing to the 224.0.0.0/4 net is setup according to these rules:
# multicast_host multicast_router route comment
# NO NO -reject no multicast
# NO YES none installed daemon will run
# YES/interface NO -interface YES=def. iface
# Any other combination -reject config error
case "$multicast_host:$multicast_router" in
NO:NO)
route -n add -net 224.0.0.0/4 -interface 127.0.0.1 -reject;;
NO:YES)
;;
*:NO)
set `if [ $multicast_host = YES ]; then
ed -s '!route -n show' <<EOF
/^default/p
EOF
else
ed -s "!ifconfig $multicast_host" <<EOF
/^ inet /p
EOF
fi`
route -n add -net 224.0.0.0/4 -interface $2;;
*:*)
echo 'config error, multicasting disabled until rc.conf is fixed'
route -n add -net 224.0.0.0/4 -interface 127.0.0.1 -reject;;
esac
# Configure NAT after configuring network interfaces
if [ "${ipnat}" = "YES" -a "${ipfilter}" = "YES" -a -f "${ipnat_rules}" ]; then
echo 'configuring NAT'
ipnat -CF -f ${ipnat_rules}
else
ipnat=NO
fi
|
