Annotation of src/etc/netstart, Revision 1.85
1.1 deraadt 1: #!/bin/sh -
2: #
1.85 ! todd 3: # $OpenBSD: netstart,v 1.84 2002/02/23 01:55:24 deraadt 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
178: hostname=`cat /etc/myname`
179: hostname $hostname
180: if [ -f /etc/defaultdomain ]; then
181: domainname `cat /etc/defaultdomain`
1.4 dm 182: fi
183:
1.83 miod 184: # Set the address for the loopback interface.
185: # It will also initialize IPv6 address for lo0 (::1 and others).
1.24 kstailey 186: ifconfig lo0 inet localhost
1.1 deraadt 187:
1.83 miod 188: # Use loopback, not the wire.
1.67 deraadt 189: route -n add -host $hostname localhost > /dev/null
190: route -n add -net 127 127.0.0.1 -reject > /dev/null
1.24 kstailey 191:
1.54 itojun 192: if ifconfig lo0 inet6 >/dev/null 2>&1; then
193: # IPv6 configurations.
194: ip6kernel=YES
195:
1.83 miod 196: # Disallow link-local unicast dest without outgoing scope identifiers.
1.67 deraadt 197: route add -inet6 fe80:: -prefixlen 10 ::1 -reject > /dev/null
1.66 itojun 198:
1.83 miod 199: # Disallow site-local unicast dest without outgoing scope identifiers.
1.66 itojun 200: # If you configure site-locals without scope id (it is permissible
201: # config for routers that are not on scope boundary), you may want
202: # to comment the line out.
1.67 deraadt 203: route add -inet6 fec0:: -prefixlen 10 ::1 -reject > /dev/null
1.66 itojun 204:
1.83 miod 205: # Disallow "internal" addresses to appear on the wire.
1.67 deraadt 206: route add -inet6 ::ffff:0.0.0.0 -prefixlen 96 ::1 -reject > /dev/null
1.66 itojun 207:
1.83 miod 208: # Disallow packets to malicious IPv4 compatible prefix.
1.67 deraadt 209: route add -inet6 ::224.0.0.0 -prefixlen 100 ::1 -reject > /dev/null
210: route add -inet6 ::127.0.0.0 -prefixlen 104 ::1 -reject > /dev/null
211: route add -inet6 ::0.0.0.0 -prefixlen 104 ::1 -reject > /dev/null
212: route add -inet6 ::255.0.0.0 -prefixlen 104 ::1 -reject > /dev/null
1.66 itojun 213:
1.83 miod 214: # Disallow packets to malicious 6to4 prefix.
1.67 deraadt 215: route add -inet6 2002:e000:: -prefixlen 20 ::1 -reject > /dev/null
216: route add -inet6 2002:7f00:: -prefixlen 24 ::1 -reject > /dev/null
217: route add -inet6 2002:0000:: -prefixlen 24 ::1 -reject > /dev/null
218: route add -inet6 2002:ff00:: -prefixlen 24 ::1 -reject > /dev/null
1.66 itojun 219:
220: # Completely disallow packets to IPv4 compatible prefix.
221: # This may conflict with RFC1933 under following circumstances:
222: # (1) An IPv6-only KAME node tries to originate packets to IPv4
1.77 deraadt 223: # compatible destination. The KAME node has no IPv4 compatible
1.66 itojun 224: # support. Under RFC1933, it should transmit native IPv6
225: # packets toward IPv4 compatible destination, hoping it would
226: # reach a router that forwards the packet toward auto-tunnel
227: # interface.
1.77 deraadt 228: # (2) An IPv6-only node originates a packet to an IPv4 compatible
1.66 itojun 229: # destination. A KAME node is acting as an IPv6 router, and
230: # asked to forward it.
1.77 deraadt 231: # Due to rare use of IPv4 compatible addresses, and security issues
1.66 itojun 232: # with it, we disable it by default.
1.67 deraadt 233: route add -inet6 ::0.0.0.0 -prefixlen 96 ::1 -reject > /dev/null
1.56 itojun 234:
235: rtsolif=""
1.54 itojun 236: else
237: ip6kernel=NO
238: fi
239:
1.83 miod 240: # Configure all the non-loopback interfaces which we know about.
241: # Refer to hostname.if(5) and bridgename.if(5)
1.47 niklas 242: for hn in /etc/hostname.*; do
1.83 miod 243: # Strip off /etc/hostname. prefix
244: if=${hn#/etc/hostname.}
1.85 ! todd 245: test "$if" = "*" && continue
1.47 niklas 246:
1.83 miod 247: case $if in
248: "gif"*|"gre"*)
249: # GIF and GRE interfaces need the routes to be setup before
250: # they are configured.
251: continue
252: ;;
1.55 todd 253: *)
1.83 miod 254: ifstart $if
1.55 todd 255: ;;
1.47 niklas 256: esac
1.50 deraadt 257: done
1.56 itojun 258:
259: if [ "$ip6kernel" = "YES" -a "x$rtsolif" != "x" ]; then
260: fw=`sysctl -n net.inet6.ip6.forwarding`
261: ra=`sysctl -n net.inet6.ip6.accept_rtadv`
262: if [ "x$fw" = "x0" -a "x$ra" = "x1" ]; then
1.57 itojun 263: echo "IPv6 autoconf:$rtsolif"
1.56 itojun 264: rtsol $rtsolif
265: else
266: echo "WARNING: inconsistent config - check /etc/sysctl.conf for IPv6 autoconf"
267: fi
1.57 itojun 268: fi
269: if [ "$ip6kernel" = "YES" ]; then
270: # this is to make sure DAD is completed before going further.
271: sleep `sysctl -n net.inet6.ip6.dad_count`
272: sleep 1
1.56 itojun 273: fi
274:
1.14 deraadt 275: # /etc/mygate, if it exists, contains the name of my gateway host
276: # that name must be in /etc/hosts.
1.42 marc 277: if [ -f /etc/mygate ]; then
1.38 deraadt 278: route -n add -host default `cat /etc/mygate`
1.14 deraadt 279: fi
1.44 deraadt 280:
1.48 niklas 281: # Multicast routing.
282: #
283: # The routing to the 224.0.0.0/4 net is setup according to these rules:
284: # multicast_host multicast_router route comment
285: # NO NO -reject no multicast
286: # NO YES none installed daemon will run
287: # YES/interface NO -interface YES=def. iface
288: # Any other combination -reject config error
289: case "$multicast_host:$multicast_router" in
290: NO:NO)
1.82 hugh 291: route -n add -net 224.0.0.0/4 -interface 127.0.0.1 -reject > /dev/null
1.67 deraadt 292: ;;
1.48 niklas 293: NO:YES)
294: ;;
295: *:NO)
296: set `if [ $multicast_host = YES ]; then
1.80 angelos 297: ed -s '!route -n show -inet' <<EOF
1.48 niklas 298: /^default/p
299: EOF
300: else
301: ed -s "!ifconfig $multicast_host" <<EOF
302: /^ inet /p
303: EOF
304: fi`
1.67 deraadt 305: route -n add -net 224.0.0.0/4 -interface $2 > /dev/null
306: ;;
1.48 niklas 307: *:*)
308: echo 'config error, multicasting disabled until rc.conf is fixed'
1.67 deraadt 309: route -n add -net 224.0.0.0/4 -interface 127.0.0.1 -reject > /dev/null
310: ;;
1.48 niklas 311: esac
1.83 miod 312:
313: # Configure all the gif and gre interfaces which we know about.
314: # They were delayed because they require the routes to be set.
315: for hn in /etc/hostname.*; do
316: # Strip off /etc/hostname. prefix
317: if=${hn#/etc/hostname.}
1.85 ! todd 318: test "$if" = "*" && continue
1.83 miod 319:
320: case $if in
321: "gif"*|"gre"*)
322: ifstart $if
323: ;;
324: *)
325: # Regular interfaces have already been configured.
326: continue
327: ;;
328: esac
329: done
330:
331: # Configure all the bridges.
332: for bn in /etc/bridgename.*; do
333: # Strip off /etc/bridgename. prefix
334: if=${bn#/etc/bridgename.}
1.85 ! todd 335: test "$if" = "*" && continue
1.83 miod 336:
337: bridgestart $if
338: done
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