netstart revision 1.38 
1#!/bin/sh -
2#
3#	$OpenBSD: netstart,v 1.38 1998/05/22 04:25:50 deraadt Exp $
4
5# /etc/myname contains my symbolic name
6#
7hostname=`cat /etc/myname`
8hostname $hostname
9if [ -f /etc/defaultdomain ]; then
10	domainname `cat /etc/defaultdomain`
11fi
12
13# pick up option configuration
14. /etc/rc.conf
15
16# Configure the IP filter before configuring network interfaces
17#
18if [ X"${ipfilter}" = X"YES" -a -f "${ipfilter_rules}" ]; then
19	echo 'configuring IP filter'
20	ipf -Fa -f ${ipfilter_rules} -E
21else
22	ipfilter=NO
23fi
24
25# Configure NAT before configuring network interfaces
26#
27if [ "${ipnat}" = "YES" -a "${ipfilter}" = "YES" -a -f "${ipnat_rules}" ]; then
28	echo 'configuring NAT'
29	ipnat -CF -f ${ipnat_rules}
30else
31	ipnat=NO
32fi
33
34# set the address for the loopback interface
35ifconfig lo0 inet localhost
36
37# use loopback, not the wire
38route -n add -host $hostname localhost
39route -n add -net 127 127.0.0.1 -reject
40
41# configure all of the non-loopback interfaces which we know about.
42# do this by reading /etc/hostname.* files, where * is the name
43# of a given interface.
44#
45# these files are formatted like the following, but with no # at the
46# beginning of the line
47#
48# addr_family hostname netmask broadcast_addr options
49# dest dest_addr
50#
51# addr_family is the address family of the interface, generally inet
52# hostname is the host name that belongs to the interface, in /etc/hosts.
53# netmask is the network mask for the interface.
54# broadcast_addr is the broadcast address for the interface
55# options are misc. options to ifconfig for the interface.
56#
57# dest is simply the string "dest" (no quotes, though) if the interface
58# has a "destination" (i.e. it's a point-to-point link, like SLIP).
59# dest_addr is the hostname of the other end of the link, in /etc/hosts
60#
61# the only required contents of the file are the addr_family field
62# and the hostname.
63
64(
65    tmp="$IFS"
66    IFS="$IFS."
67    set -- `echo /etc/hostname*`
68    IFS=$tmp
69    unset tmp
70
71    while [ $# -ge 2 ] ; do
72        shift            # get rid of "hostname"
73        (
74            read af name mask bcaddr extras
75            read dt dtaddr
76
77            if [ ! -n "$name" ]; then
78                echo "/etc/hostname.$1: invalid network configuration file"
79                exit
80            fi
81
82	    cmd="ifconfig $1 $af $name "
83	    if [ "${dt}" = "dest" ]; then cmd="$cmd $dtaddr"; fi
84	    if [ -n "$mask" ]; then cmd="$cmd netmask $mask"; fi
85	    if [ -n "$bcaddr" -a "X$bcaddr" != "XNONE" ]; then
86		cmd="$cmd broadcast $bcaddr";
87	    fi
88	    cmd="$cmd $extras"
89
90	    $cmd
91        ) < /etc/hostname.$1
92        shift
93    done
94)
95
96# /etc/mygate, if it exists, contains the name of my gateway host
97# that name must be in /etc/hosts.
98if [ -f /etc/mygate ]; then
99	route -n add -host default `cat /etc/mygate`
100fi
101
102# default multicast route
103route -n add -net 224.0.0.0 -interface $hostname
104