Annotation of src/etc/netstart, Revision 1.112
1.1 deraadt 1: #!/bin/sh -
2: #
1.112 ! reyk 3: # $OpenBSD: netstart,v 1.111 2005/11/02 18:45:26 todd Exp $
1.101 millert 4:
5: # Strip comments (and leading/trailing whitespace if IFS is set)
6: # from a file and spew to stdout
7: stripcom() {
1.108 todd 8: local _l
1.110 todd 9: [[ -f $1 ]] || return
1.108 todd 10: while read _l; do
11: [[ -n ${_l%%#*} ]] && echo $_l
12: done<$1
1.101 millert 13: }
1.45 millert 14:
15: # Returns true if $1 contains only alphanumerics
16: isalphanumeric() {
17: local _n
18: _n=$1
19: while [ ${#_n} != 0 ]; do
20: case $_n in
21: [A-Za-z0-9]*) ;;
22: *) return 1;;
23: esac
24: _n=${_n#?}
25: done
26: return 0
27: }
1.81 angelos 28:
1.83 miod 29: # Start the $1 interface
30: ifstart() {
1.84 deraadt 31: if=$1
1.83 miod 32: # Interface names must be alphanumeric only. We check to avoid
33: # configuring backup or temp files, and to catch the "*" case.
1.84 deraadt 34: if ! isalphanumeric "$if"; then
1.83 miod 35: return
36: fi
37:
1.84 deraadt 38: ifconfig $if > /dev/null 2>&1
1.83 miod 39: if [ "$?" != "0" ]; then
1.89 markus 40: # Try to create interface if it does not exist
41: ifconfig $if create > /dev/null 2>&1
42: if [ "$?" != "0" ]; then
43: return
44: fi
1.83 miod 45: fi
46:
47: # Now parse the hostname.* file
48: while :; do
49: if [ "$cmd2" ]; then
50: # We are carrying over from the 'read dt dtaddr'
51: # last time.
52: set -- $cmd2
53: af="$1" name="$2" mask="$3" bcaddr="$4" ext1="$5" cmd2=
54: # Make sure and get any remaining args in ext2,
55: # like the read below
56: i=1
57: while [ i -lt 6 -a -n "$1" ]; do shift; let i=i+1; done
58: ext2="$@"
59: else
60: # Read the next line or exit the while loop.
61: read af name mask bcaddr ext1 ext2 || break
62: fi
63: # $af can be "dhcp", "up", "rtsol", an address family,
64: # commands, or a comment.
65: case "$af" in
66: "#"*|"") # skip comments and empty lines
67: continue
68: ;;
69: "!"*) # parse commands
70: cmd="${af#*!} ${name} ${mask} ${bcaddr} ${ext1} ${ext2}"
71: ;;
72: "bridge")
1.84 deraadt 73: cmd="echo /etc/hostname.$if: bridges now supported via bridgename.* files"
1.83 miod 74: ;;
75: "dhcp")
76: [ "$name" = "NONE" ] && name=
77: [ "$mask" = "NONE" ] && mask=
78: [ "$bcaddr" = "NONE" ] && bcaddr=
1.106 todd 79: cmd="ifconfig $if $name $mask $bcaddr $ext1 $ext2 down"
80: cmd="$cmd;dhclient $if"
1.110 todd 81: dhcpif="$dhcpif $if"
1.83 miod 82: ;;
83: "rtsol")
1.84 deraadt 84: rtsolif="$rtsolif $if"
1.106 todd 85: cmd="ifconfig $if $name $mask $bcaddr $ext1 $ext2 up"
1.83 miod 86: ;;
87: "up")
1.84 deraadt 88: # The only one of these guaranteed to be set is $if.
1.83 miod 89: # The remaining ones exist so that media controls work.
1.84 deraadt 90: cmd="ifconfig $if $name $mask $bcaddr $ext1 $ext2 up"
1.83 miod 91: ;;
92: *)
93: read dt dtaddr
94: if [ "$name" = "alias" ]; then
95: # perform a 'shift' of sorts
96: alias=$name
97: name=$mask
98: mask=$bcaddr
99: bcaddr=$ext1
100: ext1=$ext2
101: ext2=
102: else
103: alias=
104: fi
1.84 deraadt 105: cmd="ifconfig $if $af $alias $name "
1.83 miod 106: case "$dt" in
107: dest)
108: cmd="$cmd $dtaddr"
109: ;;
110: [a-z!]*)
111: cmd2="$dt $dtaddr"
112: ;;
113: esac
114: if [ ! -n "$name" ]; then
1.84 deraadt 115: echo "/etc/hostname.$if: invalid network configuration file"
1.83 miod 116: return
117: fi
118: case $af in
119: inet)
120: [ "$mask" ] && cmd="$cmd netmask $mask"
121: if [ "$bcaddr" -a "X$bcaddr" != "XNONE" ]; then
122: cmd="$cmd broadcast $bcaddr"
123: fi
1.91 deraadt 124: [ "$alias" ] && rtcmd=";route -qn add -host $name 127.0.0.1"
1.83 miod 125: ;;
126: inet6) [ "$mask" ] && cmd="$cmd prefixlen $mask"
127: cmd="$cmd $bcaddr"
128: ;;
129: *)
130: cmd="$cmd $mask $bcaddr"
131: ;;
132: esac
133: cmd="$cmd $ext1 $ext2$rtcmd" rtcmd=
134: ;;
135: esac
136: eval "$cmd"
1.84 deraadt 137: done < /etc/hostname.$if
1.83 miod 138: }
139:
1.105 todd 140: # Start multiple:
141: # start "$1" interfaces in order or all interfaces if empty
142: # don't start "$2" interfaces
143: ifmstart() {
144: for sif in ${1:-ALL}; do
145: for hn in /etc/hostname.*; do
146: # Strip off /etc/hostname. prefix
147: if=${hn#/etc/hostname.}
148: test "$if" = "*" && continue
149:
150: # Skip unwanted ifs
151: s=""
152: for xf in $2; do
153: test "$xf" = "${if%%[0-9]*}" && s="1" && break
154: done
155: test "$s" = "1" && continue
156:
157: # Start wanted ifs
158: test "$sif" = "ALL" -o \
159: "$sif" = "${if%%[0-9]*}" \
160: && ifstart $if
161: done
162: done
163: }
164:
1.83 miod 165: # Start the $1 bridge
166: bridgestart() {
167: # Interface names must be alphanumeric only. We check to avoid
168: # configuring backup or temp files, and to catch the "*" case.
169: if ! isalphanumeric "$1"; then
170: return
171: fi
172: brconfig $1 > /dev/null 2>&1
173: if [ "$?" != "0" ]; then
1.90 millert 174: # Try to create interface if it does not exist
1.111 todd 175: ifconfig $1 create > /dev/null 2>&1
1.90 millert 176: if [ "$?" != "0" ]; then
177: return
178: fi
1.83 miod 179: fi
180:
181: # Now parse the bridgename.* file
182: # All lines are run as brconfig(8) commands.
183: while read line ; do
184: line=${line%%#*} # strip comments
185: test -z "$line" && continue
186: case "$line" in
187: "!"*)
188: cmd="${line#*!}"
189: ;;
190: *)
191: cmd="brconfig $1 $line"
192: ;;
193: esac
194: eval "$cmd"
195: done < /etc/bridgename.$1
196: }
197:
1.81 angelos 198: # Re-read /etc/rc.conf
199: . /etc/rc.conf
1.1 deraadt 200:
1.83 miod 201: # If we were invoked with a list of interface names, just reconfigure these
202: # interfaces (or bridges) and return.
203: if [ $1x = autobootx ]; then
204: shift
205: fi
206: if [ $# -gt 0 ]; then
207: while [ $# -gt 0 ]; do
208: if [ -f /etc/bridgename.$1 ]; then
209: bridgestart $1
210: else
211: ifstart $1
212: fi
213: shift
214: done
215: return
216: fi
217:
218: # Otherwise, process with the complete network initialization.
219:
1.1 deraadt 220: # /etc/myname contains my symbolic name
1.87 henning 221: if [ -f /etc/myname ]; then
1.100 millert 222: hostname=`stripcom /etc/myname`
1.87 henning 223: hostname $hostname
224: else
225: hostname=`hostname`
226: fi
227:
1.1 deraadt 228: if [ -f /etc/defaultdomain ]; then
1.100 millert 229: domainname `stripcom /etc/defaultdomain`
1.4 dm 230: fi
231:
1.93 deraadt 232: # Set the address for the loopback interface. Bringing the
233: # interface up, automatically invokes the IPv6 address ::1)
1.92 deraadt 234: ifconfig lo0 inet 127.0.0.1
1.24 kstailey 235:
1.54 itojun 236: if ifconfig lo0 inet6 >/dev/null 2>&1; then
237: # IPv6 configurations.
238: ip6kernel=YES
239:
1.83 miod 240: # Disallow link-local unicast dest without outgoing scope identifiers.
1.98 deraadt 241: route -qn add -inet6 fe80:: -prefixlen 10 ::1 -reject > /dev/null
1.66 itojun 242:
1.83 miod 243: # Disallow site-local unicast dest without outgoing scope identifiers.
1.66 itojun 244: # If you configure site-locals without scope id (it is permissible
245: # config for routers that are not on scope boundary), you may want
246: # to comment the line out.
1.98 deraadt 247: route -qn add -inet6 fec0:: -prefixlen 10 ::1 -reject > /dev/null
1.66 itojun 248:
1.83 miod 249: # Disallow "internal" addresses to appear on the wire.
1.98 deraadt 250: route -qn add -inet6 ::ffff:0.0.0.0 -prefixlen 96 ::1 -reject > /dev/null
1.66 itojun 251:
1.83 miod 252: # Disallow packets to malicious IPv4 compatible prefix.
1.98 deraadt 253: route -qn add -inet6 ::224.0.0.0 -prefixlen 100 ::1 -reject > /dev/null
254: route -qn add -inet6 ::127.0.0.0 -prefixlen 104 ::1 -reject > /dev/null
255: route -qn add -inet6 ::0.0.0.0 -prefixlen 104 ::1 -reject > /dev/null
256: route -qn add -inet6 ::255.0.0.0 -prefixlen 104 ::1 -reject > /dev/null
1.66 itojun 257:
1.83 miod 258: # Disallow packets to malicious 6to4 prefix.
1.98 deraadt 259: route -qn add -inet6 2002:e000:: -prefixlen 20 ::1 -reject > /dev/null
260: route -qn add -inet6 2002:7f00:: -prefixlen 24 ::1 -reject > /dev/null
261: route -qn add -inet6 2002:0000:: -prefixlen 24 ::1 -reject > /dev/null
262: route -qn add -inet6 2002:ff00:: -prefixlen 24 ::1 -reject > /dev/null
1.66 itojun 263:
264: # Completely disallow packets to IPv4 compatible prefix.
265: # This may conflict with RFC1933 under following circumstances:
266: # (1) An IPv6-only KAME node tries to originate packets to IPv4
1.77 deraadt 267: # compatible destination. The KAME node has no IPv4 compatible
1.66 itojun 268: # support. Under RFC1933, it should transmit native IPv6
269: # packets toward IPv4 compatible destination, hoping it would
270: # reach a router that forwards the packet toward auto-tunnel
271: # interface.
1.77 deraadt 272: # (2) An IPv6-only node originates a packet to an IPv4 compatible
1.66 itojun 273: # destination. A KAME node is acting as an IPv6 router, and
274: # asked to forward it.
1.77 deraadt 275: # Due to rare use of IPv4 compatible addresses, and security issues
1.66 itojun 276: # with it, we disable it by default.
1.98 deraadt 277: route -qn add -inet6 ::0.0.0.0 -prefixlen 96 ::1 -reject > /dev/null
1.56 itojun 278:
279: rtsolif=""
1.54 itojun 280: else
281: ip6kernel=NO
282: fi
283:
1.105 todd 284:
285: # Configure all the non-loopback interfaces which we know about, but
286: # do not start interfaces which must be delayed.
1.83 miod 287: # Refer to hostname.if(5) and bridgename.if(5)
1.107 todd 288: ifmstart "" "trunk vlan carp gif gre pfsync pppoe"
1.56 itojun 289:
290: if [ "$ip6kernel" = "YES" -a "x$rtsolif" != "x" ]; then
291: fw=`sysctl -n net.inet6.ip6.forwarding`
292: ra=`sysctl -n net.inet6.ip6.accept_rtadv`
293: if [ "x$fw" = "x0" -a "x$ra" = "x1" ]; then
1.57 itojun 294: echo "IPv6 autoconf:$rtsolif"
1.56 itojun 295: rtsol $rtsolif
296: else
297: echo "WARNING: inconsistent config - check /etc/sysctl.conf for IPv6 autoconf"
298: fi
1.57 itojun 299: fi
300: if [ "$ip6kernel" = "YES" ]; then
301: # this is to make sure DAD is completed before going further.
302: sleep `sysctl -n net.inet6.ip6.dad_count`
1.56 itojun 303: fi
304:
1.107 todd 305: # The trunk interfaces need to come up first in this list.
306: # The vlan interfaces need to come up after trunk.
307: # The pfsync interfaces need to come up before carp.
1.102 mcbride 308: # Configure all the carp interfaces which we know about.
309: # They must come up after pfsync but before default route.
1.107 todd 310: ifmstart "trunk vlan pfsync carp"
1.102 mcbride 311:
1.14 deraadt 312: # /etc/mygate, if it exists, contains the name of my gateway host
313: # that name must be in /etc/hosts.
1.110 todd 314: [[ -z $dhcpif ]] && stripcom /etc/mygate | while read gw; do
315: [[ $gw == @(*:*) ]] && continue
316: route -qn delete default > /dev/null 2>&1
317: route -qn add -host default $gw && break
318: done
319: [[ -z $rtsolif ]] && stripcom /etc/mygate | while read gw; do
320: [[ $gw == !(*:*) ]] && continue
321: route -qn delete -inet6 default > /dev/null 2>&1
322: route -qn add -host -inet6 default $gw && break
323: done
1.44 deraadt 324:
1.48 niklas 325: # Multicast routing.
326: #
327: # The routing to the 224.0.0.0/4 net is setup according to these rules:
328: # multicast_host multicast_router route comment
329: # NO NO -reject no multicast
330: # NO YES none installed daemon will run
331: # YES/interface NO -interface YES=def. iface
332: # Any other combination -reject config error
1.112 ! reyk 333: route -qn delete 224.0.0.0/4 > /dev/null 2>&1
1.48 niklas 334: case "$multicast_host:$multicast_router" in
335: NO:NO)
1.91 deraadt 336: route -qn add -net 224.0.0.0/4 -interface 127.0.0.1 -reject > /dev/null
1.67 deraadt 337: ;;
1.48 niklas 338: NO:YES)
339: ;;
340: *:NO)
1.112 ! reyk 341: maddr=`if [ "$multicast_host" = "YES" ]; then
1.91 deraadt 342: ed -s '!route -qn show -inet' <<EOF
1.48 niklas 343: /^default/p
344: EOF
345: else
346: ed -s "!ifconfig $multicast_host" <<EOF
347: /^ inet /p
348: EOF
1.112 ! reyk 349: fi 2> /dev/null`
! 350: if [ "X${maddr}" != "X" ]; then
! 351: set $maddr
! 352: route -qn add -net 224.0.0.0/4 -interface $2 > /dev/null
! 353: else
! 354: route -qn add -net 224.0.0.0/4 -interface \
! 355: 127.0.0.1 -reject > /dev/null
! 356: fi
1.67 deraadt 357: ;;
1.48 niklas 358: *:*)
359: echo 'config error, multicasting disabled until rc.conf is fixed'
1.91 deraadt 360: route -qn add -net 224.0.0.0/4 -interface 127.0.0.1 -reject > /dev/null
1.67 deraadt 361: ;;
1.48 niklas 362: esac
1.83 miod 363:
1.105 todd 364:
365: # Configure PPPoE, GIF, GRE interfaces, delayed because they require routes
366: # to be set. PPPoE must be first, as GIF and GRE may depend on it.
367: ifmstart "pppoe gif gre"
1.92 deraadt 368:
1.99 itojun 369: # reject 127/8 other than 127.0.0.1
1.92 deraadt 370: route -qn add -net 127 127.0.0.1 -reject > /dev/null
1.83 miod 371:
372: # Configure all the bridges.
373: for bn in /etc/bridgename.*; do
374: # Strip off /etc/bridgename. prefix
375: if=${bn#/etc/bridgename.}
1.85 todd 376: test "$if" = "*" && continue
1.83 miod 377:
378: bridgestart $if
379: done
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