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Annotation of src/etc/netstart, Revision 1.37

1.1       deraadt     1: #!/bin/sh -
                      2: #
1.37    ! deraadt     3: #      $OpenBSD: netstart,v 1.36 1998/02/23 20:47:35 niklas Exp $
1.1       deraadt     4:
                      5: # /etc/myname contains my symbolic name
                      6: #
                      7: hostname=`cat /etc/myname`
                      8: hostname $hostname
                      9: if [ -f /etc/defaultdomain ]; then
                     10:        domainname `cat /etc/defaultdomain`
1.4       dm         11: fi
1.30      deraadt    12:
                     13: # pick up option configuration
                     14: . /etc/rc.conf
1.4       dm         15:
                     16: # Configure the IP filter before configuring network interfaces
                     17: #
                     18: if [ X"${ipfilter}" = X"YES" -a -f "${ipfilter_rules}" ]; then
                     19:        echo 'configuring IP filter'
                     20:        ipf -Fa -f ${ipfilter_rules} -E
                     21: else
                     22:        ipfilter=NO
1.1       deraadt    23: fi
1.17      kstailey   24:
                     25: # Configure NAT before configuring network interfaces
                     26: #
1.37    ! deraadt    27: if [ "${ipnat}" = "YES" -a "${ipfilter}" = "YES" -a -f "${ipnat_rules}" ]; then
1.17      kstailey   28:        echo 'configuring NAT'
1.37    ! deraadt    29:        ipnat -CF -f ${ipnat_rules}
1.17      kstailey   30: else
1.37    ! deraadt    31:        ipnat=NO
1.17      kstailey   32: fi
                     33:
1.24      kstailey   34: # set the address for the loopback interface
                     35: ifconfig lo0 inet localhost
1.1       deraadt    36:
1.24      kstailey   37: # use loopback, not the wire
1.28      millert    38: route add -host $hostname localhost
1.24      kstailey   39: route add -net 127 127.0.0.1 -reject
                     40:
                     41: # configure all of the non-loopback interfaces which we know about.
1.1       deraadt    42: # do this by reading /etc/hostname.* files, where * is the name
                     43: # of a given interface.
                     44: #
                     45: # these files are formatted like the following, but with no # at the
                     46: # beginning of the line
                     47: #
                     48: # addr_family hostname netmask broadcast_addr options
                     49: # dest dest_addr
                     50: #
                     51: # addr_family is the address family of the interface, generally inet
                     52: # hostname is the host name that belongs to the interface, in /etc/hosts.
                     53: # netmask is the network mask for the interface.
                     54: # broadcast_addr is the broadcast address for the interface
                     55: # options are misc. options to ifconfig for the interface.
                     56: #
                     57: # dest is simply the string "dest" (no quotes, though) if the interface
                     58: # has a "destination" (i.e. it's a point-to-point link, like SLIP).
                     59: # dest_addr is the hostname of the other end of the link, in /etc/hosts
                     60: #
                     61: # the only required contents of the file are the addr_family field
                     62: # and the hostname.
                     63:
                     64: (
                     65:     tmp="$IFS"
                     66:     IFS="$IFS."
                     67:     set -- `echo /etc/hostname*`
                     68:     IFS=$tmp
                     69:     unset tmp
                     70:
                     71:     while [ $# -ge 2 ] ; do
                     72:         shift            # get rid of "hostname"
                     73:         (
                     74:             read af name mask bcaddr extras
1.31      deraadt    75:             read dt dtaddr
1.1       deraadt    76:
                     77:             if [ ! -n "$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:
1.14      deraadt    96: # /etc/mygate, if it exists, contains the name of my gateway host
                     97: # that name must be in /etc/hosts.
                     98: if [ -f /etc/mygate ]; then
1.28      millert    99:        route add -host default `cat /etc/mygate`
1.14      deraadt   100: fi
1.6       tholo     101:
                    102: # default multicast route
1.9       deraadt   103: route add -net 224.0.0.0 -interface $hostname