Annotation of src/etc/netstart, Revision 1.88
1.1 deraadt 1: #!/bin/sh -
2: #
1.88 ! david 3: # $OpenBSD: netstart,v 1.87 2003/08/27 11:49:36 henning 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: }
1.81 angelos 18:
1.83 miod 19: # Start the $1 interface
20: ifstart() {
1.84 deraadt 21: if=$1
1.83 miod 22: # Interface names must be alphanumeric only. We check to avoid
23: # configuring backup or temp files, and to catch the "*" case.
1.84 deraadt 24: if ! isalphanumeric "$if"; then
1.83 miod 25: return
26: fi
27:
1.84 deraadt 28: ifconfig $if > /dev/null 2>&1
1.83 miod 29: if [ "$?" != "0" ]; then
30: return
31: fi
32:
33: # Now parse the hostname.* file
34: while :; do
35: if [ "$cmd2" ]; then
36: # We are carrying over from the 'read dt dtaddr'
37: # last time.
38: set -- $cmd2
39: af="$1" name="$2" mask="$3" bcaddr="$4" ext1="$5" cmd2=
40: # Make sure and get any remaining args in ext2,
41: # like the read below
42: i=1
43: while [ i -lt 6 -a -n "$1" ]; do shift; let i=i+1; done
44: ext2="$@"
45: else
46: # Read the next line or exit the while loop.
47: read af name mask bcaddr ext1 ext2 || break
48: fi
49: # $af can be "dhcp", "up", "rtsol", an address family,
50: # commands, or a comment.
51: case "$af" in
52: "#"*|"") # skip comments and empty lines
53: continue
54: ;;
55: "!"*) # parse commands
56: cmd="${af#*!} ${name} ${mask} ${bcaddr} ${ext1} ${ext2}"
57: ;;
58: "bridge")
1.84 deraadt 59: cmd="echo /etc/hostname.$if: bridges now supported via bridgename.* files"
1.83 miod 60: ;;
61: "dhcp")
62: [ "$name" = "NONE" ] && name=
63: [ "$mask" = "NONE" ] && mask=
64: [ "$bcaddr" = "NONE" ] && bcaddr=
1.84 deraadt 65: ifconfig $if $name $mask $bcaddr $ext1 $ext2 down
66: cmd="dhclient $if"
1.83 miod 67: ;;
68: "rtsol")
1.84 deraadt 69: ifconfig $if $name $mask $bcaddr $ext1 $ext2 up
70: rtsolif="$rtsolif $if"
1.83 miod 71: cmd=
72: ;;
73: "up")
1.84 deraadt 74: # The only one of these guaranteed to be set is $if.
1.83 miod 75: # The remaining ones exist so that media controls work.
1.84 deraadt 76: cmd="ifconfig $if $name $mask $bcaddr $ext1 $ext2 up"
1.83 miod 77: ;;
78: *)
79: read dt dtaddr
80: if [ "$name" = "alias" ]; then
81: # perform a 'shift' of sorts
82: alias=$name
83: name=$mask
84: mask=$bcaddr
85: bcaddr=$ext1
86: ext1=$ext2
87: ext2=
88: else
89: alias=
90: fi
1.84 deraadt 91: cmd="ifconfig $if $af $alias $name "
1.83 miod 92: case "$dt" in
93: dest)
94: cmd="$cmd $dtaddr"
95: ;;
96: [a-z!]*)
97: cmd2="$dt $dtaddr"
98: ;;
99: esac
100: if [ ! -n "$name" ]; then
1.84 deraadt 101: echo "/etc/hostname.$if: invalid network configuration file"
1.83 miod 102: return
103: fi
104: case $af in
105: inet)
106: [ "$mask" ] && cmd="$cmd netmask $mask"
107: if [ "$bcaddr" -a "X$bcaddr" != "XNONE" ]; then
108: cmd="$cmd broadcast $bcaddr"
109: fi
110: [ "$alias" ] && rtcmd=";route -n add -host $name 127.0.0.1"
111: ;;
112: inet6) [ "$mask" ] && cmd="$cmd prefixlen $mask"
113: cmd="$cmd $bcaddr"
114: ;;
115: *)
116: cmd="$cmd $mask $bcaddr"
117: ;;
118: esac
119: cmd="$cmd $ext1 $ext2$rtcmd" rtcmd=
120: ;;
121: esac
122: eval "$cmd"
1.84 deraadt 123: done < /etc/hostname.$if
1.83 miod 124: }
125:
126: # Start the $1 bridge
127: bridgestart() {
128: # Interface names must be alphanumeric only. We check to avoid
129: # configuring backup or temp files, and to catch the "*" case.
130: if ! isalphanumeric "$1"; then
131: return
132: fi
133: brconfig $1 > /dev/null 2>&1
134: if [ "$?" != "0" ]; then
135: return
136: fi
137:
138: # Now parse the bridgename.* file
139: # All lines are run as brconfig(8) commands.
140: while read line ; do
141: line=${line%%#*} # strip comments
142: test -z "$line" && continue
143: case "$line" in
144: "!"*)
145: cmd="${line#*!}"
146: ;;
147: *)
148: cmd="brconfig $1 $line"
149: ;;
150: esac
151: eval "$cmd"
152: done < /etc/bridgename.$1
153: }
154:
1.81 angelos 155: # Re-read /etc/rc.conf
156: . /etc/rc.conf
1.1 deraadt 157:
1.83 miod 158: # If we were invoked with a list of interface names, just reconfigure these
159: # interfaces (or bridges) and return.
160: if [ $1x = autobootx ]; then
161: shift
162: fi
163: if [ $# -gt 0 ]; then
164: while [ $# -gt 0 ]; do
165: if [ -f /etc/bridgename.$1 ]; then
166: bridgestart $1
167: else
168: ifstart $1
169: fi
170: shift
171: done
172: return
173: fi
174:
175: # Otherwise, process with the complete network initialization.
176:
1.1 deraadt 177: # /etc/myname contains my symbolic name
1.87 henning 178: if [ -f /etc/myname ]; then
179: hostname=`cat /etc/myname`
180: hostname $hostname
181: else
182: hostname=`hostname`
183: fi
184:
1.1 deraadt 185: if [ -f /etc/defaultdomain ]; then
186: domainname `cat /etc/defaultdomain`
1.4 dm 187: fi
188:
1.83 miod 189: # Set the address for the loopback interface.
190: # It will also initialize IPv6 address for lo0 (::1 and others).
1.24 kstailey 191: ifconfig lo0 inet localhost
1.1 deraadt 192:
1.83 miod 193: # Use loopback, not the wire.
1.67 deraadt 194: route -n add -host $hostname localhost > /dev/null
195: route -n add -net 127 127.0.0.1 -reject > /dev/null
1.24 kstailey 196:
1.54 itojun 197: if ifconfig lo0 inet6 >/dev/null 2>&1; then
198: # IPv6 configurations.
199: ip6kernel=YES
200:
1.83 miod 201: # Disallow link-local unicast dest without outgoing scope identifiers.
1.67 deraadt 202: route add -inet6 fe80:: -prefixlen 10 ::1 -reject > /dev/null
1.66 itojun 203:
1.83 miod 204: # Disallow site-local unicast dest without outgoing scope identifiers.
1.66 itojun 205: # If you configure site-locals without scope id (it is permissible
206: # config for routers that are not on scope boundary), you may want
207: # to comment the line out.
1.67 deraadt 208: route add -inet6 fec0:: -prefixlen 10 ::1 -reject > /dev/null
1.66 itojun 209:
1.83 miod 210: # Disallow "internal" addresses to appear on the wire.
1.67 deraadt 211: route add -inet6 ::ffff:0.0.0.0 -prefixlen 96 ::1 -reject > /dev/null
1.66 itojun 212:
1.83 miod 213: # Disallow packets to malicious IPv4 compatible prefix.
1.67 deraadt 214: route add -inet6 ::224.0.0.0 -prefixlen 100 ::1 -reject > /dev/null
215: route add -inet6 ::127.0.0.0 -prefixlen 104 ::1 -reject > /dev/null
216: route add -inet6 ::0.0.0.0 -prefixlen 104 ::1 -reject > /dev/null
217: route add -inet6 ::255.0.0.0 -prefixlen 104 ::1 -reject > /dev/null
1.66 itojun 218:
1.83 miod 219: # Disallow packets to malicious 6to4 prefix.
1.67 deraadt 220: route add -inet6 2002:e000:: -prefixlen 20 ::1 -reject > /dev/null
221: route add -inet6 2002:7f00:: -prefixlen 24 ::1 -reject > /dev/null
222: route add -inet6 2002:0000:: -prefixlen 24 ::1 -reject > /dev/null
223: route add -inet6 2002:ff00:: -prefixlen 24 ::1 -reject > /dev/null
1.66 itojun 224:
225: # Completely disallow packets to IPv4 compatible prefix.
226: # This may conflict with RFC1933 under following circumstances:
227: # (1) An IPv6-only KAME node tries to originate packets to IPv4
1.77 deraadt 228: # compatible destination. The KAME node has no IPv4 compatible
1.66 itojun 229: # support. Under RFC1933, it should transmit native IPv6
230: # packets toward IPv4 compatible destination, hoping it would
231: # reach a router that forwards the packet toward auto-tunnel
232: # interface.
1.77 deraadt 233: # (2) An IPv6-only node originates a packet to an IPv4 compatible
1.66 itojun 234: # destination. A KAME node is acting as an IPv6 router, and
235: # asked to forward it.
1.77 deraadt 236: # Due to rare use of IPv4 compatible addresses, and security issues
1.66 itojun 237: # with it, we disable it by default.
1.67 deraadt 238: route add -inet6 ::0.0.0.0 -prefixlen 96 ::1 -reject > /dev/null
1.56 itojun 239:
240: rtsolif=""
1.54 itojun 241: else
242: ip6kernel=NO
243: fi
244:
1.83 miod 245: # Configure all the non-loopback interfaces which we know about.
246: # Refer to hostname.if(5) and bridgename.if(5)
1.47 niklas 247: for hn in /etc/hostname.*; do
1.83 miod 248: # Strip off /etc/hostname. prefix
249: if=${hn#/etc/hostname.}
1.85 todd 250: test "$if" = "*" && continue
1.47 niklas 251:
1.83 miod 252: case $if in
1.88 ! david 253: "carp"*|"gif"*|"gre"*)
! 254: # CARP, GIF and GRE interfaces need the routes to be setup
! 255: # before they are configured.
1.83 miod 256: continue
257: ;;
1.55 todd 258: *)
1.83 miod 259: ifstart $if
1.55 todd 260: ;;
1.47 niklas 261: esac
1.50 deraadt 262: done
1.56 itojun 263:
264: if [ "$ip6kernel" = "YES" -a "x$rtsolif" != "x" ]; then
265: fw=`sysctl -n net.inet6.ip6.forwarding`
266: ra=`sysctl -n net.inet6.ip6.accept_rtadv`
267: if [ "x$fw" = "x0" -a "x$ra" = "x1" ]; then
1.57 itojun 268: echo "IPv6 autoconf:$rtsolif"
1.56 itojun 269: rtsol $rtsolif
270: else
271: echo "WARNING: inconsistent config - check /etc/sysctl.conf for IPv6 autoconf"
272: fi
1.57 itojun 273: fi
274: if [ "$ip6kernel" = "YES" ]; then
275: # this is to make sure DAD is completed before going further.
276: sleep `sysctl -n net.inet6.ip6.dad_count`
277: sleep 1
1.56 itojun 278: fi
279:
1.14 deraadt 280: # /etc/mygate, if it exists, contains the name of my gateway host
281: # that name must be in /etc/hosts.
1.42 marc 282: if [ -f /etc/mygate ]; then
1.86 krw 283: route delete default > /dev/null 2>&1
1.38 deraadt 284: route -n add -host default `cat /etc/mygate`
1.14 deraadt 285: fi
1.44 deraadt 286:
1.48 niklas 287: # Multicast routing.
288: #
289: # The routing to the 224.0.0.0/4 net is setup according to these rules:
290: # multicast_host multicast_router route comment
291: # NO NO -reject no multicast
292: # NO YES none installed daemon will run
293: # YES/interface NO -interface YES=def. iface
294: # Any other combination -reject config error
295: case "$multicast_host:$multicast_router" in
296: NO:NO)
1.82 hugh 297: route -n add -net 224.0.0.0/4 -interface 127.0.0.1 -reject > /dev/null
1.67 deraadt 298: ;;
1.48 niklas 299: NO:YES)
300: ;;
301: *:NO)
302: set `if [ $multicast_host = YES ]; then
1.80 angelos 303: ed -s '!route -n show -inet' <<EOF
1.48 niklas 304: /^default/p
305: EOF
306: else
307: ed -s "!ifconfig $multicast_host" <<EOF
308: /^ inet /p
309: EOF
310: fi`
1.67 deraadt 311: route -n add -net 224.0.0.0/4 -interface $2 > /dev/null
312: ;;
1.48 niklas 313: *:*)
314: echo 'config error, multicasting disabled until rc.conf is fixed'
1.67 deraadt 315: route -n add -net 224.0.0.0/4 -interface 127.0.0.1 -reject > /dev/null
316: ;;
1.48 niklas 317: esac
1.83 miod 318:
1.88 ! david 319: # Configure all the carp, gif and gre interfaces which we know about.
1.83 miod 320: # They were delayed because they require the routes to be set.
321: for hn in /etc/hostname.*; do
322: # Strip off /etc/hostname. prefix
323: if=${hn#/etc/hostname.}
1.85 todd 324: test "$if" = "*" && continue
1.83 miod 325:
326: case $if in
1.88 ! david 327: "carp"*|"gif"*|"gre"*)
1.83 miod 328: ifstart $if
329: ;;
330: *)
331: # Regular interfaces have already been configured.
332: continue
333: ;;
334: esac
335: done
336:
337: # Configure all the bridges.
338: for bn in /etc/bridgename.*; do
339: # Strip off /etc/bridgename. prefix
340: if=${bn#/etc/bridgename.}
1.85 todd 341: test "$if" = "*" && continue
1.83 miod 342:
343: bridgestart $if
344: done
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