Annotation of src/etc/netstart, Revision 1.47
1.1 deraadt 1: #!/bin/sh -
2: #
1.47 ! niklas 3: # $OpenBSD: netstart,v 1.46 1999/03/01 05:04:24 millert Exp $
1.45 millert 4:
5: # Returns true if $1 contains only alphanumerics
6: isalphanumeric() {
7: local _n
8: _n=$1
9: while [ ${#_n} != 0 ]; do
10: case $_n in
11: [A-Za-z0-9]*) ;;
12: *) return 1;;
13: esac
14: _n=${_n#?}
15: done
16: return 0
17: }
1.1 deraadt 18:
19: # /etc/myname contains my symbolic name
20: #
21: hostname=`cat /etc/myname`
22: hostname $hostname
23: if [ -f /etc/defaultdomain ]; then
24: domainname `cat /etc/defaultdomain`
1.4 dm 25: fi
1.30 deraadt 26:
27: # pick up option configuration
28: . /etc/rc.conf
1.4 dm 29:
30: # Configure the IP filter before configuring network interfaces
31: if [ X"${ipfilter}" = X"YES" -a -f "${ipfilter_rules}" ]; then
32: echo 'configuring IP filter'
33: ipf -Fa -f ${ipfilter_rules} -E
34: else
35: ipfilter=NO
1.1 deraadt 36: fi
1.17 kstailey 37:
1.24 kstailey 38: # set the address for the loopback interface
39: ifconfig lo0 inet localhost
1.1 deraadt 40:
1.24 kstailey 41: # use loopback, not the wire
1.38 deraadt 42: route -n add -host $hostname localhost
43: route -n add -net 127 127.0.0.1 -reject
1.24 kstailey 44:
45: # configure all of the non-loopback interfaces which we know about.
1.1 deraadt 46: # do this by reading /etc/hostname.* files, where * is the name
47: # of a given interface.
48: #
49: # these files are formatted like the following, but with no # at the
50: # beginning of the line
51: #
52: # addr_family hostname netmask broadcast_addr options
53: # dest dest_addr
54: #
1.42 marc 55: # OR
56: #
1.47 ! niklas 57: # dhcp
! 58: #
! 59: # OR
! 60: #
! 61: # bridge
! 62: # brconfig-arguments [ several lines if needed ]
1.42 marc 63: #
1.1 deraadt 64: # addr_family is the address family of the interface, generally inet
65: # hostname is the host name that belongs to the interface, in /etc/hosts.
66: # netmask is the network mask for the interface.
67: # broadcast_addr is the broadcast address for the interface
68: # options are misc. options to ifconfig for the interface.
69: #
70: # dest is simply the string "dest" (no quotes, though) if the interface
71: # has a "destination" (i.e. it's a point-to-point link, like SLIP).
72: # dest_addr is the hostname of the other end of the link, in /etc/hosts
73: #
1.47 ! niklas 74: # the only required contents of the file in this mode are the addr_family field
! 75: # and the hostname.
! 76: #
1.42 marc 77: # dhcp is simply the string "dhcp" (no quotes, though) if the interface
78: # is to be configured using DHCP. See dhclient(8) and dhclient.conf(5)
79: # for details.
80: #
1.47 ! niklas 81: # bridge is the string "bridge" (still no quotes). Bridge interfaces
! 82: # are just configured "up" and then brconfig(8) is called for each
! 83: # line of arguments following this first line.
! 84:
! 85: for hn in /etc/hostname.*; do
! 86: # Strip off /etc/hostname. prefix
! 87: if=${hn#/etc/hostname.}
! 88:
! 89: # Interface names must be alphanumeric only. We check to avoid
! 90: # configuring backup or temp files, and to catch the "*" case.
! 91: if ! isalphanumeric "$if"; then
! 92: continue
! 93: fi
! 94:
! 95: # Now parse the hostname.* file
! 96: {
! 97: read af name mask bcaddr extras
! 98:
! 99: # $af can be either "bridge", "dhcp", "up" or an address family.
! 100: case "$af" in
! 101: "bridge")
! 102: ifconfig $if up
! 103: cmd=`sed "s/\(.*\)/brconfig $if \1;/"`
! 104: ;;
! 105: "dhcp")
! 106: ifconfig $if $extras down
! 107: cmd="/sbin/dhclient $if"
! 108: ;;
! 109: "up")
! 110: # The only one of these guaranteed to be set is $if
! 111: cmd="ifconfig $if $name $mask $bcaddr $extras up"
! 112: ;;
! 113: *)
1.31 deraadt 114: read dt dtaddr
1.47 ! niklas 115: if [ ! -n "$name" ]; then
! 116: echo "/etc/hostname.$if: invalid network configuration file"
! 117: exit
! 118: fi
1.1 deraadt 119:
1.47 ! niklas 120: cmd="ifconfig $if $af $name "
! 121: if [ "${dt}" = "dest" ]; then cmd="$cmd $dtaddr"; fi
! 122: if [ -n "$mask" ]; then cmd="$cmd netmask $mask"; fi
! 123: if [ -n "$bcaddr" -a "X$bcaddr" != "XNONE" ]; then
! 124: cmd="$cmd broadcast $bcaddr";
1.1 deraadt 125: fi
1.47 ! niklas 126: cmd="$cmd $extras";
! 127: ;;
! 128: esac
! 129:
! 130: eval "$cmd"
! 131: } < /etc/hostname.$if
! 132: done
1.1 deraadt 133:
1.14 deraadt 134: # /etc/mygate, if it exists, contains the name of my gateway host
135: # that name must be in /etc/hosts.
1.42 marc 136: if [ -f /etc/mygate ]; then
1.38 deraadt 137: route -n add -host default `cat /etc/mygate`
1.40 downsj 138:
139: # default multicast route for hosts with a gateway
140: route -n add -net 224.0.0.0 -interface default
1.42 marc 141: else
1.40 downsj 142: # default multicast route
143: route -n add -net 224.0.0.0 -interface $hostname
1.14 deraadt 144: fi
1.44 deraadt 145:
146: # Configure NAT after configuring network interfaces
147: if [ "${ipnat}" = "YES" -a "${ipfilter}" = "YES" -a -f "${ipnat_rules}" ]; then
148: echo 'configuring NAT'
149: ipnat -CF -f ${ipnat_rules}
150: else
151: ipnat=NO
152: fi
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