Annotation of src/etc/netstart, Revision 1.55
1.1 deraadt 1: #!/bin/sh -
2: #
1.55 ! todd 3: # $OpenBSD: netstart,v 1.54 1999/12/31 04:32:53 itojun 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
1.52 itojun 39: # it will also initialize IPv6 address for lo0 (::1 and others).
1.24 kstailey 40: ifconfig lo0 inet localhost
1.1 deraadt 41:
1.24 kstailey 42: # use loopback, not the wire
1.38 deraadt 43: route -n add -host $hostname localhost
44: route -n add -net 127 127.0.0.1 -reject
1.24 kstailey 45:
1.54 itojun 46: if ifconfig lo0 inet6 >/dev/null 2>&1; then
47: # IPv6 configurations.
48: ip6kernel=YES
49:
50: # disallow scoped unicast dest without outgoing scope identifiers.
51: route add -inet6 fe80:: -prefixlen 10 ::1 -reject
52: route add -inet6 fc80:: -prefixlen 10 ::1 -reject
53: # disallow "internal" addresses to appear on the wire.
54: route add -inet6 ::ffff:0.0.0.0 -prefixlen 96 ::1 -reject
55: route add -inet6 ::0.0.0.0 -prefixlen 96 ::1 -reject
56: else
57: ip6kernel=NO
58: fi
59:
1.24 kstailey 60: # configure all of the non-loopback interfaces which we know about.
1.50 deraadt 61: # refer to hostname.if(5) and bridgename.if(5)
1.47 niklas 62: for hn in /etc/hostname.*; do
63: # Strip off /etc/hostname. prefix
64: if=${hn#/etc/hostname.}
65:
66: # Interface names must be alphanumeric only. We check to avoid
67: # configuring backup or temp files, and to catch the "*" case.
68: if ! isalphanumeric "$if"; then
1.55 ! todd 69: continue
1.49 angelos 70: fi
1.50 deraadt 71: ifconfig $if > /dev/null 2>&1
1.49 angelos 72: if [ "$?" != "0" ]; then
73: continue
1.47 niklas 74: fi
75:
76: # Now parse the hostname.* file
1.55 ! todd 77: while :; do
! 78: if [ "$cmd2" ]; then
! 79: # we are carrying over from the 'read dt dtaddr' last time
! 80: set -- $cmd2
! 81: af="$1" name="$2" mask="$3" bcaddr="$4" ext1="$5" ext2="$6"
! 82: cmd2=
! 83: else
! 84: # read the next line or exit the while loop
! 85: read af name mask bcaddr ext1 ext2 || break
! 86: fi
! 87: # skip comments
! 88: [ "${af#*#}" = "${af}" ] || continue
1.50 deraadt 89: # $af can be either "dhcp", "up" or an address family.
1.47 niklas 90: case "$af" in
91: "bridge")
1.50 deraadt 92: cmd="echo ${hn}: bridges now supported via bridgename.* files"
93: ;;
1.47 niklas 94: "dhcp")
1.55 ! todd 95: ifconfig $if $name $mask $bcaddr $ext1 $ext2 down
1.50 deraadt 96: cmd="dhclient $if"
1.47 niklas 97: ;;
98: "up")
99: # The only one of these guaranteed to be set is $if
1.50 deraadt 100: # the remaining ones exist so that media controls work
1.55 ! todd 101: cmd="ifconfig $if $name $mask $bcaddr $ext1 $ext2 up"
! 102: ;;
! 103: *)
! 104: read dt dtaddr
! 105: if [ "$name" = "alias" ]; then
! 106: # perform a 'shift' of sorts
! 107: alias=$name
! 108: name=$mask
! 109: mask=$bcaddr
! 110: bcaddr=$ext1
! 111: ext1=$ext2
! 112: ext2=
1.47 niklas 113: fi
1.55 ! todd 114: cmd="ifconfig $if $af $alias $name "
! 115: case $dt in
! 116: dest)
! 117: cmd="$cmd $dtaddr"
! 118: ;;
! 119: [a-z]*)
! 120: cmd2="$dt $dtaddr"
! 121: ;;
! 122: esac
! 123: if [ ! -n "$name" ]; then
! 124: echo "/etc/hostname.$if: invalid network configuration file"
! 125: return
! 126: fi
! 127: case $af in
! 128: inet)
! 129: [ "$mask" ] && cmd="$cmd netmask $mask"
! 130: if [ "$bcaddr" -a "X$bcaddr" != "XNONE" ]; then
! 131: cmd="$cmd broadcast $bcaddr"
! 132: fi
! 133: [ "$alias" ] && rtcmd="; route -n add -host $name 127.0.0.1"
! 134: ;;
! 135: inet6) [ "$mask" ] && cmd="$cmd prefixlen $mask"
! 136: cmd="$cmd $bcaddr"
! 137: ;;
! 138: *) cmd="$cmd $mask $bcaddr"
! 139: esac
! 140: cmd="$cmd $ext1 $ext2$rtcmd" rtcmd=
! 141: ;;
1.47 niklas 142: esac
143: eval "$cmd"
1.55 ! todd 144: done < /etc/hostname.$if
1.50 deraadt 145: done
146: for bn in /etc/bridgename.*; do
147: # Strip off /etc/bridgename. prefix
148: if=${bn#/etc/bridgename.}
149:
150: # Interface names must be alphanumeric only. We check to avoid
151: # configuring backup or temp files, and to catch the "*" case.
152: if ! isalphanumeric "$if"; then
153: continue
154: fi
155: brconfig $if > /dev/null 2>&1
156: if [ "$?" != "0" ]; then
157: continue
158: fi
159:
160: # Now parse the bridgename.* file
161: {
162: # All lines are run as brconfig(8) commands.
163: while read line ; do
1.51 deraadt 164: line=${line%%#*} # strip comments
165: test -z "$line" && continue
1.50 deraadt 166: brconfig $if $line
167: done
168: } < /etc/bridgename.$if
1.47 niklas 169: done
1.1 deraadt 170:
1.14 deraadt 171: # /etc/mygate, if it exists, contains the name of my gateway host
172: # that name must be in /etc/hosts.
1.42 marc 173: if [ -f /etc/mygate ]; then
1.38 deraadt 174: route -n add -host default `cat /etc/mygate`
1.14 deraadt 175: fi
1.44 deraadt 176:
1.48 niklas 177: # Multicast routing.
178: #
179: # The routing to the 224.0.0.0/4 net is setup according to these rules:
180: # multicast_host multicast_router route comment
181: # NO NO -reject no multicast
182: # NO YES none installed daemon will run
183: # YES/interface NO -interface YES=def. iface
184: # Any other combination -reject config error
185: case "$multicast_host:$multicast_router" in
186: NO:NO)
187: route -n add -net 224.0.0.0/4 -interface 127.0.0.1 -reject;;
188: NO:YES)
189: ;;
190: *:NO)
191: set `if [ $multicast_host = YES ]; then
192: ed -s '!route -n show' <<EOF
193: /^default/p
194: EOF
195: else
196: ed -s "!ifconfig $multicast_host" <<EOF
197: /^ inet /p
198: EOF
199: fi`
200: route -n add -net 224.0.0.0/4 -interface $2;;
201: *:*)
202: echo 'config error, multicasting disabled until rc.conf is fixed'
203: route -n add -net 224.0.0.0/4 -interface 127.0.0.1 -reject;;
204: esac
1.53 itojun 205:
1.44 deraadt 206: # Configure NAT after configuring network interfaces
207: if [ "${ipnat}" = "YES" -a "${ipfilter}" = "YES" -a -f "${ipnat_rules}" ]; then
208: echo 'configuring NAT'
209: ipnat -CF -f ${ipnat_rules}
210: else
211: ipnat=NO
212: fi
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