Annotation of src/etc/netstart, Revision 1.67
1.1 deraadt 1: #!/bin/sh -
2: #
1.67 ! deraadt 3: # $OpenBSD: netstart,v 1.66 2000/03/17 17:40:31 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
1.67 ! deraadt 43: route -n add -host $hostname localhost > /dev/null
! 44: route -n add -net 127 127.0.0.1 -reject > /dev/null
1.24 kstailey 45:
1.54 itojun 46: if ifconfig lo0 inet6 >/dev/null 2>&1; then
47: # IPv6 configurations.
48: ip6kernel=YES
49:
1.66 itojun 50: # disallow link-local unicast dest without outgoing scope identifiers.
1.67 ! deraadt 51: route add -inet6 fe80:: -prefixlen 10 ::1 -reject > /dev/null
1.66 itojun 52:
53: # disallow site-local unicast dest without outgoing scope identifiers..
54: # If you configure site-locals without scope id (it is permissible
55: # config for routers that are not on scope boundary), you may want
56: # to comment the line out.
1.67 ! deraadt 57: route add -inet6 fec0:: -prefixlen 10 ::1 -reject > /dev/null
1.66 itojun 58:
1.54 itojun 59: # disallow "internal" addresses to appear on the wire.
1.67 ! deraadt 60: route add -inet6 ::ffff:0.0.0.0 -prefixlen 96 ::1 -reject > /dev/null
1.66 itojun 61:
62: # disallow packets to malicious IPv4 compatible prefix.
1.67 ! deraadt 63: route add -inet6 ::224.0.0.0 -prefixlen 100 ::1 -reject > /dev/null
! 64: route add -inet6 ::127.0.0.0 -prefixlen 104 ::1 -reject > /dev/null
! 65: route add -inet6 ::0.0.0.0 -prefixlen 104 ::1 -reject > /dev/null
! 66: route add -inet6 ::255.0.0.0 -prefixlen 104 ::1 -reject > /dev/null
1.66 itojun 67:
68: # disallow packets to malicious 6to4 prefix.
1.67 ! deraadt 69: route add -inet6 2002:e000:: -prefixlen 20 ::1 -reject > /dev/null
! 70: route add -inet6 2002:7f00:: -prefixlen 24 ::1 -reject > /dev/null
! 71: route add -inet6 2002:0000:: -prefixlen 24 ::1 -reject > /dev/null
! 72: route add -inet6 2002:ff00:: -prefixlen 24 ::1 -reject > /dev/null
1.66 itojun 73:
74: # Completely disallow packets to IPv4 compatible prefix.
75: # This may conflict with RFC1933 under following circumstances:
76: # (1) An IPv6-only KAME node tries to originate packets to IPv4
77: # comatible destination. The KAME node has no IPv4 compatible
78: # support. Under RFC1933, it should transmit native IPv6
79: # packets toward IPv4 compatible destination, hoping it would
80: # reach a router that forwards the packet toward auto-tunnel
81: # interface.
82: # (2) An IPv6-only node originates a packet to IPv4 compatible
83: # destination. A KAME node is acting as an IPv6 router, and
84: # asked to forward it.
85: # Due to rare use of IPv4 compatible address, and security issues
86: # with it, we disable it by default.
1.67 ! deraadt 87: route add -inet6 ::0.0.0.0 -prefixlen 96 ::1 -reject > /dev/null
1.56 itojun 88:
89: rtsolif=""
1.54 itojun 90: else
91: ip6kernel=NO
92: fi
93:
1.24 kstailey 94: # configure all of the non-loopback interfaces which we know about.
1.50 deraadt 95: # refer to hostname.if(5) and bridgename.if(5)
1.47 niklas 96: for hn in /etc/hostname.*; do
97: # Strip off /etc/hostname. prefix
98: if=${hn#/etc/hostname.}
99:
100: # Interface names must be alphanumeric only. We check to avoid
101: # configuring backup or temp files, and to catch the "*" case.
102: if ! isalphanumeric "$if"; then
1.55 todd 103: continue
1.49 angelos 104: fi
1.50 deraadt 105: ifconfig $if > /dev/null 2>&1
1.49 angelos 106: if [ "$?" != "0" ]; then
107: continue
1.47 niklas 108: fi
109:
110: # Now parse the hostname.* file
1.55 todd 111: while :; do
112: if [ "$cmd2" ]; then
113: # we are carrying over from the 'read dt dtaddr' last time
114: set -- $cmd2
115: af="$1" name="$2" mask="$3" bcaddr="$4" ext1="$5" ext2="$6"
116: cmd2=
117: else
118: # read the next line or exit the while loop
119: read af name mask bcaddr ext1 ext2 || break
120: fi
1.63 todd 121: # $af can be "dhcp", "up", "rtsol", an address family, commands, or
122: # a comment.
1.47 niklas 123: case "$af" in
1.63 todd 124: "#"*) # skip comments
125: continue
126: ;;
127: "!"*) # parse commands
128: cmd="${af#*!} ${name} ${mask} ${bcaddr} ${ext1} ${ext2}"
129: ;;
1.47 niklas 130: "bridge")
1.50 deraadt 131: cmd="echo ${hn}: bridges now supported via bridgename.* files"
132: ;;
1.47 niklas 133: "dhcp")
1.55 todd 134: ifconfig $if $name $mask $bcaddr $ext1 $ext2 down
1.50 deraadt 135: cmd="dhclient $if"
1.47 niklas 136: ;;
1.56 itojun 137: "rtsol")
1.62 deraadt 138: ifconfig $if $name $mask $bcaddr $ext1 $ext2 up
1.56 itojun 139: rtsolif="$rtsolif $if"
1.59 todd 140: cmd=
1.56 itojun 141: ;;
1.47 niklas 142: "up")
143: # The only one of these guaranteed to be set is $if
1.50 deraadt 144: # the remaining ones exist so that media controls work
1.55 todd 145: cmd="ifconfig $if $name $mask $bcaddr $ext1 $ext2 up"
146: ;;
147: *)
148: read dt dtaddr
149: if [ "$name" = "alias" ]; then
150: # perform a 'shift' of sorts
151: alias=$name
152: name=$mask
153: mask=$bcaddr
154: bcaddr=$ext1
155: ext1=$ext2
156: ext2=
1.47 niklas 157: fi
1.55 todd 158: cmd="ifconfig $if $af $alias $name "
1.64 todd 159: case "$dt" in
1.55 todd 160: dest)
161: cmd="$cmd $dtaddr"
162: ;;
1.64 todd 163: [a-z!]*)
1.55 todd 164: cmd2="$dt $dtaddr"
165: ;;
1.60 itojun 166: esac
167: if [ ! -n "$name" ]; then
1.55 todd 168: echo "/etc/hostname.$if: invalid network configuration file"
169: return
1.60 itojun 170: fi
171: case $af in
172: inet)
1.55 todd 173: [ "$mask" ] && cmd="$cmd netmask $mask"
174: if [ "$bcaddr" -a "X$bcaddr" != "XNONE" ]; then
175: cmd="$cmd broadcast $bcaddr"
176: fi
177: [ "$alias" ] && rtcmd="; route -n add -host $name 127.0.0.1"
1.61 itojun 178: ;;
1.60 itojun 179: inet6) [ "$mask" ] && cmd="$cmd prefixlen $mask"
1.55 todd 180: cmd="$cmd $bcaddr"
181: ;;
1.60 itojun 182: *) cmd="$cmd $mask $bcaddr"
183: esac
184: cmd="$cmd $ext1 $ext2$rtcmd" rtcmd=
185: ;;
1.47 niklas 186: esac
187: eval "$cmd"
1.55 todd 188: done < /etc/hostname.$if
1.50 deraadt 189: done
1.56 itojun 190:
191: if [ "$ip6kernel" = "YES" -a "x$rtsolif" != "x" ]; then
192: fw=`sysctl -n net.inet6.ip6.forwarding`
193: ra=`sysctl -n net.inet6.ip6.accept_rtadv`
194: if [ "x$fw" = "x0" -a "x$ra" = "x1" ]; then
1.57 itojun 195: echo "IPv6 autoconf:$rtsolif"
1.56 itojun 196: rtsol $rtsolif
197: else
198: echo "WARNING: inconsistent config - check /etc/sysctl.conf for IPv6 autoconf"
199: fi
1.57 itojun 200: fi
201: if [ "$ip6kernel" = "YES" ]; then
202: # this is to make sure DAD is completed before going further.
203: sleep `sysctl -n net.inet6.ip6.dad_count`
204: sleep 1
1.56 itojun 205: fi
206:
1.50 deraadt 207: for bn in /etc/bridgename.*; do
208: # Strip off /etc/bridgename. prefix
209: if=${bn#/etc/bridgename.}
210:
211: # Interface names must be alphanumeric only. We check to avoid
212: # configuring backup or temp files, and to catch the "*" case.
213: if ! isalphanumeric "$if"; then
214: continue
215: fi
216: brconfig $if > /dev/null 2>&1
217: if [ "$?" != "0" ]; then
218: continue
219: fi
220:
221: # Now parse the bridgename.* file
222: {
223: # All lines are run as brconfig(8) commands.
224: while read line ; do
1.51 deraadt 225: line=${line%%#*} # strip comments
226: test -z "$line" && continue
1.50 deraadt 227: brconfig $if $line
228: done
229: } < /etc/bridgename.$if
1.47 niklas 230: done
1.1 deraadt 231:
1.14 deraadt 232: # /etc/mygate, if it exists, contains the name of my gateway host
233: # that name must be in /etc/hosts.
1.42 marc 234: if [ -f /etc/mygate ]; then
1.38 deraadt 235: route -n add -host default `cat /etc/mygate`
1.14 deraadt 236: fi
1.44 deraadt 237:
1.48 niklas 238: # Multicast routing.
239: #
240: # The routing to the 224.0.0.0/4 net is setup according to these rules:
241: # multicast_host multicast_router route comment
242: # NO NO -reject no multicast
243: # NO YES none installed daemon will run
244: # YES/interface NO -interface YES=def. iface
245: # Any other combination -reject config error
246: case "$multicast_host:$multicast_router" in
247: NO:NO)
1.67 ! deraadt 248: route -n add -net 224.0.0.0/4 -interface 127.0.0.1 -reject> /dev/null
! 249: ;;
1.48 niklas 250: NO:YES)
251: ;;
252: *:NO)
253: set `if [ $multicast_host = YES ]; then
254: ed -s '!route -n show' <<EOF
255: /^default/p
256: EOF
257: else
258: ed -s "!ifconfig $multicast_host" <<EOF
259: /^ inet /p
260: EOF
261: fi`
1.67 ! deraadt 262: route -n add -net 224.0.0.0/4 -interface $2 > /dev/null
! 263: ;;
1.48 niklas 264: *:*)
265: echo 'config error, multicasting disabled until rc.conf is fixed'
1.67 ! deraadt 266: route -n add -net 224.0.0.0/4 -interface 127.0.0.1 -reject > /dev/null
! 267: ;;
1.48 niklas 268: esac
1.53 itojun 269:
1.44 deraadt 270: # Configure NAT after configuring network interfaces
271: if [ "${ipnat}" = "YES" -a "${ipfilter}" = "YES" -a -f "${ipnat_rules}" ]; then
272: echo 'configuring NAT'
273: ipnat -CF -f ${ipnat_rules}
274: else
275: ipnat=NO
276: fi
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