Annotation of src/etc/netstart, Revision 1.69
1.1 deraadt 1: #!/bin/sh -
2: #
1.69 ! deraadt 3: # $OpenBSD: netstart,v 1.68 2000/04/04 13:44:51 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
1.69 ! deraadt 29: if [ -f $local_rcconf ]; then
! 30: . $local_rcconf
! 31: fi
1.4 dm 32:
33: # Configure the IP filter before configuring network interfaces
34: if [ X"${ipfilter}" = X"YES" -a -f "${ipfilter_rules}" ]; then
35: echo 'configuring IP filter'
1.68 millert 36: ipf -Fa -f ${ipfilter_rules}
1.4 dm 37: else
38: ipfilter=NO
1.1 deraadt 39: fi
1.17 kstailey 40:
1.24 kstailey 41: # set the address for the loopback interface
1.52 itojun 42: # it will also initialize IPv6 address for lo0 (::1 and others).
1.24 kstailey 43: ifconfig lo0 inet localhost
1.1 deraadt 44:
1.24 kstailey 45: # use loopback, not the wire
1.67 deraadt 46: route -n add -host $hostname localhost > /dev/null
47: route -n add -net 127 127.0.0.1 -reject > /dev/null
1.24 kstailey 48:
1.54 itojun 49: if ifconfig lo0 inet6 >/dev/null 2>&1; then
50: # IPv6 configurations.
51: ip6kernel=YES
52:
1.66 itojun 53: # disallow link-local unicast dest without outgoing scope identifiers.
1.67 deraadt 54: route add -inet6 fe80:: -prefixlen 10 ::1 -reject > /dev/null
1.66 itojun 55:
56: # disallow site-local unicast dest without outgoing scope identifiers..
57: # If you configure site-locals without scope id (it is permissible
58: # config for routers that are not on scope boundary), you may want
59: # to comment the line out.
1.67 deraadt 60: route add -inet6 fec0:: -prefixlen 10 ::1 -reject > /dev/null
1.66 itojun 61:
1.54 itojun 62: # disallow "internal" addresses to appear on the wire.
1.67 deraadt 63: route add -inet6 ::ffff:0.0.0.0 -prefixlen 96 ::1 -reject > /dev/null
1.66 itojun 64:
65: # disallow packets to malicious IPv4 compatible prefix.
1.67 deraadt 66: route add -inet6 ::224.0.0.0 -prefixlen 100 ::1 -reject > /dev/null
67: route add -inet6 ::127.0.0.0 -prefixlen 104 ::1 -reject > /dev/null
68: route add -inet6 ::0.0.0.0 -prefixlen 104 ::1 -reject > /dev/null
69: route add -inet6 ::255.0.0.0 -prefixlen 104 ::1 -reject > /dev/null
1.66 itojun 70:
71: # disallow packets to malicious 6to4 prefix.
1.67 deraadt 72: route add -inet6 2002:e000:: -prefixlen 20 ::1 -reject > /dev/null
73: route add -inet6 2002:7f00:: -prefixlen 24 ::1 -reject > /dev/null
74: route add -inet6 2002:0000:: -prefixlen 24 ::1 -reject > /dev/null
75: route add -inet6 2002:ff00:: -prefixlen 24 ::1 -reject > /dev/null
1.66 itojun 76:
77: # Completely disallow packets to IPv4 compatible prefix.
78: # This may conflict with RFC1933 under following circumstances:
79: # (1) An IPv6-only KAME node tries to originate packets to IPv4
80: # comatible destination. The KAME node has no IPv4 compatible
81: # support. Under RFC1933, it should transmit native IPv6
82: # packets toward IPv4 compatible destination, hoping it would
83: # reach a router that forwards the packet toward auto-tunnel
84: # interface.
85: # (2) An IPv6-only node originates a packet to IPv4 compatible
86: # destination. A KAME node is acting as an IPv6 router, and
87: # asked to forward it.
88: # Due to rare use of IPv4 compatible address, and security issues
89: # with it, we disable it by default.
1.67 deraadt 90: route add -inet6 ::0.0.0.0 -prefixlen 96 ::1 -reject > /dev/null
1.56 itojun 91:
92: rtsolif=""
1.54 itojun 93: else
94: ip6kernel=NO
95: fi
96:
1.24 kstailey 97: # configure all of the non-loopback interfaces which we know about.
1.50 deraadt 98: # refer to hostname.if(5) and bridgename.if(5)
1.47 niklas 99: for hn in /etc/hostname.*; do
100: # Strip off /etc/hostname. prefix
101: if=${hn#/etc/hostname.}
102:
103: # Interface names must be alphanumeric only. We check to avoid
104: # configuring backup or temp files, and to catch the "*" case.
105: if ! isalphanumeric "$if"; then
1.55 todd 106: continue
1.49 angelos 107: fi
1.50 deraadt 108: ifconfig $if > /dev/null 2>&1
1.49 angelos 109: if [ "$?" != "0" ]; then
110: continue
1.47 niklas 111: fi
112:
113: # Now parse the hostname.* file
1.55 todd 114: while :; do
115: if [ "$cmd2" ]; then
116: # we are carrying over from the 'read dt dtaddr' last time
117: set -- $cmd2
118: af="$1" name="$2" mask="$3" bcaddr="$4" ext1="$5" ext2="$6"
119: cmd2=
120: else
121: # read the next line or exit the while loop
122: read af name mask bcaddr ext1 ext2 || break
123: fi
1.63 todd 124: # $af can be "dhcp", "up", "rtsol", an address family, commands, or
125: # a comment.
1.47 niklas 126: case "$af" in
1.63 todd 127: "#"*) # skip comments
128: continue
129: ;;
130: "!"*) # parse commands
131: cmd="${af#*!} ${name} ${mask} ${bcaddr} ${ext1} ${ext2}"
132: ;;
1.47 niklas 133: "bridge")
1.50 deraadt 134: cmd="echo ${hn}: bridges now supported via bridgename.* files"
135: ;;
1.47 niklas 136: "dhcp")
1.55 todd 137: ifconfig $if $name $mask $bcaddr $ext1 $ext2 down
1.50 deraadt 138: cmd="dhclient $if"
1.47 niklas 139: ;;
1.56 itojun 140: "rtsol")
1.62 deraadt 141: ifconfig $if $name $mask $bcaddr $ext1 $ext2 up
1.56 itojun 142: rtsolif="$rtsolif $if"
1.59 todd 143: cmd=
1.56 itojun 144: ;;
1.47 niklas 145: "up")
146: # The only one of these guaranteed to be set is $if
1.50 deraadt 147: # the remaining ones exist so that media controls work
1.55 todd 148: cmd="ifconfig $if $name $mask $bcaddr $ext1 $ext2 up"
149: ;;
150: *)
151: read dt dtaddr
152: if [ "$name" = "alias" ]; then
153: # perform a 'shift' of sorts
154: alias=$name
155: name=$mask
156: mask=$bcaddr
157: bcaddr=$ext1
158: ext1=$ext2
159: ext2=
1.47 niklas 160: fi
1.55 todd 161: cmd="ifconfig $if $af $alias $name "
1.64 todd 162: case "$dt" in
1.55 todd 163: dest)
164: cmd="$cmd $dtaddr"
165: ;;
1.64 todd 166: [a-z!]*)
1.55 todd 167: cmd2="$dt $dtaddr"
168: ;;
1.60 itojun 169: esac
170: if [ ! -n "$name" ]; then
1.55 todd 171: echo "/etc/hostname.$if: invalid network configuration file"
172: return
1.60 itojun 173: fi
174: case $af in
175: inet)
1.55 todd 176: [ "$mask" ] && cmd="$cmd netmask $mask"
177: if [ "$bcaddr" -a "X$bcaddr" != "XNONE" ]; then
178: cmd="$cmd broadcast $bcaddr"
179: fi
180: [ "$alias" ] && rtcmd="; route -n add -host $name 127.0.0.1"
1.61 itojun 181: ;;
1.60 itojun 182: inet6) [ "$mask" ] && cmd="$cmd prefixlen $mask"
1.55 todd 183: cmd="$cmd $bcaddr"
184: ;;
1.60 itojun 185: *) cmd="$cmd $mask $bcaddr"
186: esac
187: cmd="$cmd $ext1 $ext2$rtcmd" rtcmd=
188: ;;
1.47 niklas 189: esac
190: eval "$cmd"
1.55 todd 191: done < /etc/hostname.$if
1.50 deraadt 192: done
1.56 itojun 193:
194: if [ "$ip6kernel" = "YES" -a "x$rtsolif" != "x" ]; then
195: fw=`sysctl -n net.inet6.ip6.forwarding`
196: ra=`sysctl -n net.inet6.ip6.accept_rtadv`
197: if [ "x$fw" = "x0" -a "x$ra" = "x1" ]; then
1.57 itojun 198: echo "IPv6 autoconf:$rtsolif"
1.56 itojun 199: rtsol $rtsolif
200: else
201: echo "WARNING: inconsistent config - check /etc/sysctl.conf for IPv6 autoconf"
202: fi
1.57 itojun 203: fi
204: if [ "$ip6kernel" = "YES" ]; then
205: # this is to make sure DAD is completed before going further.
206: sleep `sysctl -n net.inet6.ip6.dad_count`
207: sleep 1
1.56 itojun 208: fi
209:
1.50 deraadt 210: for bn in /etc/bridgename.*; do
211: # Strip off /etc/bridgename. prefix
212: if=${bn#/etc/bridgename.}
213:
214: # Interface names must be alphanumeric only. We check to avoid
215: # configuring backup or temp files, and to catch the "*" case.
216: if ! isalphanumeric "$if"; then
217: continue
218: fi
219: brconfig $if > /dev/null 2>&1
220: if [ "$?" != "0" ]; then
221: continue
222: fi
223:
224: # Now parse the bridgename.* file
225: {
226: # All lines are run as brconfig(8) commands.
227: while read line ; do
1.51 deraadt 228: line=${line%%#*} # strip comments
229: test -z "$line" && continue
1.50 deraadt 230: brconfig $if $line
231: done
232: } < /etc/bridgename.$if
1.47 niklas 233: done
1.1 deraadt 234:
1.14 deraadt 235: # /etc/mygate, if it exists, contains the name of my gateway host
236: # that name must be in /etc/hosts.
1.42 marc 237: if [ -f /etc/mygate ]; then
1.38 deraadt 238: route -n add -host default `cat /etc/mygate`
1.14 deraadt 239: fi
1.44 deraadt 240:
1.48 niklas 241: # Multicast routing.
242: #
243: # The routing to the 224.0.0.0/4 net is setup according to these rules:
244: # multicast_host multicast_router route comment
245: # NO NO -reject no multicast
246: # NO YES none installed daemon will run
247: # YES/interface NO -interface YES=def. iface
248: # Any other combination -reject config error
249: case "$multicast_host:$multicast_router" in
250: NO:NO)
1.67 deraadt 251: route -n add -net 224.0.0.0/4 -interface 127.0.0.1 -reject> /dev/null
252: ;;
1.48 niklas 253: NO:YES)
254: ;;
255: *:NO)
256: set `if [ $multicast_host = YES ]; then
257: ed -s '!route -n show' <<EOF
258: /^default/p
259: EOF
260: else
261: ed -s "!ifconfig $multicast_host" <<EOF
262: /^ inet /p
263: EOF
264: fi`
1.67 deraadt 265: route -n add -net 224.0.0.0/4 -interface $2 > /dev/null
266: ;;
1.48 niklas 267: *:*)
268: echo 'config error, multicasting disabled until rc.conf is fixed'
1.67 deraadt 269: route -n add -net 224.0.0.0/4 -interface 127.0.0.1 -reject > /dev/null
270: ;;
1.48 niklas 271: esac
1.53 itojun 272:
1.44 deraadt 273: # Configure NAT after configuring network interfaces
274: if [ "${ipnat}" = "YES" -a "${ipfilter}" = "YES" -a -f "${ipnat_rules}" ]; then
275: echo 'configuring NAT'
276: ipnat -CF -f ${ipnat_rules}
277: else
278: ipnat=NO
279: fi
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