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rfc1323 variable

#!/bin/sh -
#
#	$OpenBSD: netstart,v 1.11 1996/09/23 13:06:37 deraadt Exp $

# set these to "NO" to turn them off.  otherwise, they're used as flags
routed_flags=-q
mrouted_flags=NO	# for 'normal' use: mrouted_flags=""
rarpd_flags=NO		# for 'normal' use: rarpd_flags="-a"
bootparamd_flags=NO	# for 'normal' use: bootparamd_flags=""
rbootd_flags=NO		# for 'normal' use: rbootd_flags=""
sendmail_flags=NO	# for 'normal' use: sendmail_flags="-bd -q30m"
named_flags=NO		# for 'normal' use: named_flags=""
timed_flags=

# set the following to "YES" to turn them on
rwhod=NO
nfs_server=NO
nfs_client=NO
gated=NO
kerberos_server=NO
amd=NO
ipfilter=NO
portmap=YES			# almost always needed
inetd=YES			# almost always needed
lpd=NO				# printing daemons

# miscellaneous other flags
# only used if the appropriate server is marked YES above
gated_flags=
amd_dir=/amd			# AMD's mount directory
amd_master=/etc/amd/master	# AMD 'master' map
ipfilter_rules=/etc/ipf.rules	# Rules for IP packet filtering
ipmon_flags=-s			# To disable logging, use ipmon_flags=NO
rfc1323=YES			# TCP RFC1323 extensions (disable if tcp is slow)

# /etc/myname contains my symbolic name
#
hostname=`cat /etc/myname`
hostname $hostname
if [ -f /etc/defaultdomain ]; then
	domainname `cat /etc/defaultdomain`
fi

# 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

# configure all of the 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
#
# 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 are the addr_family field
# and the hostname.

(
    tmp="$IFS"
    IFS="$IFS."
    set -- `echo /etc/hostname*`
    IFS=$tmp
    unset tmp

    while [ $# -ge 2 ] ; do
        shift            # get rid of "hostname"
        (
            read af name mask bcaddr extras
            read dt dtaddr 

            if [ ! -n "$name" ]; then
                echo "/etc/hostname.$1: invalid network configuration file"
                exit
            fi

	    cmd="ifconfig $1 $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"

	    $cmd
        ) < /etc/hostname.$1
        shift
    done
)

# set the address for the loopback interface
ifconfig lo0 inet localhost

# use loopback, not the wire
route add $hostname localhost
route add -net 127 127.0.0.1 -reject

# default multicast route
route add -net 224.0.0.0 -interface $hostname

# /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 add default `cat /etc/mygate`
fi

# /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
#	interface address netmask
if [ -f /etc/ifaliases ]; then
(
	# delete comments and blank lines
	set -- `sed -e 's/#.*$//' /etc/ifaliases | grep -v '^$'`

	while [ $# -ge 3 ] ; do
		ifconfig $1 inet alias $2 netmask $3
		route add $2 localhost
		shift 3
	done
)
fi