Annotation of src/etc/netstart, Revision 1.136
1.1 deraadt 1: #!/bin/sh -
2: #
1.136 ! rpe 3: # $OpenBSD: netstart,v 1.135 2012/12/02 16:19:18 rpe 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:
1.83 miod 15: # Start the $1 interface
16: ifstart() {
1.84 deraadt 17: if=$1
1.83 miod 18: # Interface names must be alphanumeric only. We check to avoid
19: # configuring backup or temp files, and to catch the "*" case.
1.135 rpe 20: if [[ $if != +([[:alpha:]])+([[:digit:]]) ]]; then
21: echo "netstart: $if: Invalid interface name"
1.83 miod 22: return
23: fi
24:
1.119 deraadt 25: file=/etc/hostname.$if
1.121 todd 26: if ! [ -f $file ]; then
27: echo "netstart: $file: No such file or directory"
28: return
29: fi
1.123 sthen 30: # Not using stat(1), we can't rely on having /usr yet
31: set -A stat -- `ls -nL $file`
32: if [ "${stat[0]#???????} ${stat[2]} ${stat[3]}" != "--- 0 0" ]; then
1.119 deraadt 33: echo "WARNING: $file is insecure, fixing permissions"
1.122 sthen 34: chmod -LR o-rwx $file
35: chown -LR root.wheel $file
1.119 deraadt 36: fi
1.136 ! rpe 37: # Check for ifconfig'able interface.
! 38: (ifconfig $if || ifconfig $if create) >/dev/null 2>&1 || return
1.83 miod 39:
40: # Now parse the hostname.* file
41: while :; do
42: if [ "$cmd2" ]; then
43: # We are carrying over from the 'read dt dtaddr'
44: # last time.
45: set -- $cmd2
46: af="$1" name="$2" mask="$3" bcaddr="$4" ext1="$5" cmd2=
47: # Make sure and get any remaining args in ext2,
48: # like the read below
49: i=1
1.126 simon 50: while [ $i -lt 6 -a -n "$1" ]; do shift; let i=i+1; done
1.83 miod 51: ext2="$@"
52: else
53: # Read the next line or exit the while loop.
54: read af name mask bcaddr ext1 ext2 || break
55: fi
56: # $af can be "dhcp", "up", "rtsol", an address family,
57: # commands, or a comment.
58: case "$af" in
59: "#"*|"") # skip comments and empty lines
60: continue
61: ;;
62: "!"*) # parse commands
63: cmd="${af#*!} ${name} ${mask} ${bcaddr} ${ext1} ${ext2}"
64: ;;
65: "dhcp")
66: [ "$name" = "NONE" ] && name=
67: [ "$mask" = "NONE" ] && mask=
68: [ "$bcaddr" = "NONE" ] && bcaddr=
1.106 todd 69: cmd="ifconfig $if $name $mask $bcaddr $ext1 $ext2 down"
70: cmd="$cmd;dhclient $if"
1.110 todd 71: dhcpif="$dhcpif $if"
1.83 miod 72: ;;
73: "rtsol")
1.84 deraadt 74: rtsolif="$rtsolif $if"
1.106 todd 75: cmd="ifconfig $if $name $mask $bcaddr $ext1 $ext2 up"
1.83 miod 76: ;;
77: *)
78: read dt dtaddr
79: if [ "$name" = "alias" ]; then
80: # perform a 'shift' of sorts
81: alias=$name
82: name=$mask
83: mask=$bcaddr
84: bcaddr=$ext1
85: ext1=$ext2
86: ext2=
87: else
88: alias=
89: fi
1.114 todd 90: cmd="ifconfig $if $af $alias $name"
1.83 miod 91: case "$dt" in
92: dest)
93: cmd="$cmd $dtaddr"
94: ;;
1.130 todd 95: *)
1.83 miod 96: cmd2="$dt $dtaddr"
97: ;;
98: esac
99: case $af in
100: inet)
1.128 todd 101: if [ ! -n "$name" ]; then
102: echo "/etc/hostname.$if: inet alone is invalid"
103: return
104: fi
1.83 miod 105: [ "$mask" ] && cmd="$cmd netmask $mask"
106: if [ "$bcaddr" -a "X$bcaddr" != "XNONE" ]; then
107: cmd="$cmd broadcast $bcaddr"
108: fi
1.91 deraadt 109: [ "$alias" ] && rtcmd=";route -qn add -host $name 127.0.0.1"
1.83 miod 110: ;;
1.128 todd 111: inet6)
112: if [ ! -n "$name" ]; then
113: echo "/etc/hostname.$if: inet6 alone is invalid"
114: return
115: fi
116: [ "$mask" ] && cmd="$cmd prefixlen $mask"
1.83 miod 117: cmd="$cmd $bcaddr"
118: ;;
119: *)
120: cmd="$cmd $mask $bcaddr"
121: ;;
122: esac
123: cmd="$cmd $ext1 $ext2$rtcmd" rtcmd=
124: ;;
125: esac
126: eval "$cmd"
1.84 deraadt 127: done < /etc/hostname.$if
1.83 miod 128: }
129:
1.105 todd 130: # Start multiple:
131: # start "$1" interfaces in order or all interfaces if empty
132: # don't start "$2" interfaces
133: ifmstart() {
134: for sif in ${1:-ALL}; do
135: for hn in /etc/hostname.*; do
136: # Strip off /etc/hostname. prefix
137: if=${hn#/etc/hostname.}
138: test "$if" = "*" && continue
1.113 david 139:
1.105 todd 140: # Skip unwanted ifs
1.113 david 141: s=""
1.105 todd 142: for xf in $2; do
143: test "$xf" = "${if%%[0-9]*}" && s="1" && break
144: done
145: test "$s" = "1" && continue
146:
147: # Start wanted ifs
148: test "$sif" = "ALL" -o \
149: "$sif" = "${if%%[0-9]*}" \
150: && ifstart $if
151: done
152: done
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.
1.135 rpe 160: if [[ $1 == autoboot ]]; then
1.83 miod 161: shift
162: fi
163: if [ $# -gt 0 ]; then
164: while [ $# -gt 0 ]; do
1.127 deraadt 165: ifstart $1
1.83 miod 166: shift
167: done
168: return
169: fi
170:
171: # Otherwise, process with the complete network initialization.
172:
1.1 deraadt 173: # /etc/myname contains my symbolic name
1.87 henning 174: if [ -f /etc/myname ]; then
1.100 millert 175: hostname=`stripcom /etc/myname`
1.87 henning 176: hostname $hostname
177: else
178: hostname=`hostname`
1.4 dm 179: fi
180:
1.131 sobrado 181: # Set the address for the loopback interface. Bringing the interface up,
182: # automatically invokes the IPv6 address ::1.
1.129 henning 183: ifconfig lo0 inet 127.0.0.1/8
1.24 kstailey 184:
1.54 itojun 185: if ifconfig lo0 inet6 >/dev/null 2>&1; then
186: # IPv6 configurations.
187: ip6kernel=YES
188:
1.83 miod 189: # Disallow link-local unicast dest without outgoing scope identifiers.
1.98 deraadt 190: route -qn add -inet6 fe80:: -prefixlen 10 ::1 -reject > /dev/null
1.66 itojun 191:
1.83 miod 192: # Disallow site-local unicast dest without outgoing scope identifiers.
1.66 itojun 193: # If you configure site-locals without scope id (it is permissible
194: # config for routers that are not on scope boundary), you may want
195: # to comment the line out.
1.98 deraadt 196: route -qn add -inet6 fec0:: -prefixlen 10 ::1 -reject > /dev/null
1.66 itojun 197:
1.83 miod 198: # Disallow "internal" addresses to appear on the wire.
1.98 deraadt 199: route -qn add -inet6 ::ffff:0.0.0.0 -prefixlen 96 ::1 -reject > /dev/null
1.66 itojun 200:
1.83 miod 201: # Disallow packets to malicious IPv4 compatible prefix.
1.98 deraadt 202: route -qn add -inet6 ::224.0.0.0 -prefixlen 100 ::1 -reject > /dev/null
203: route -qn add -inet6 ::127.0.0.0 -prefixlen 104 ::1 -reject > /dev/null
204: route -qn add -inet6 ::0.0.0.0 -prefixlen 104 ::1 -reject > /dev/null
205: route -qn add -inet6 ::255.0.0.0 -prefixlen 104 ::1 -reject > /dev/null
1.66 itojun 206:
1.83 miod 207: # Disallow packets to malicious 6to4 prefix.
1.98 deraadt 208: route -qn add -inet6 2002:e000:: -prefixlen 20 ::1 -reject > /dev/null
209: route -qn add -inet6 2002:7f00:: -prefixlen 24 ::1 -reject > /dev/null
210: route -qn add -inet6 2002:0000:: -prefixlen 24 ::1 -reject > /dev/null
211: route -qn add -inet6 2002:ff00:: -prefixlen 24 ::1 -reject > /dev/null
1.115 itojun 212:
213: # Disallow packets without scope identifier.
214: route -qn add -inet6 ff01:: -prefixlen 16 ::1 -reject > /dev/null
215: route -qn add -inet6 ff02:: -prefixlen 16 ::1 -reject > /dev/null
1.66 itojun 216:
217: # Completely disallow packets to IPv4 compatible prefix.
218: # This may conflict with RFC1933 under following circumstances:
219: # (1) An IPv6-only KAME node tries to originate packets to IPv4
1.77 deraadt 220: # compatible destination. The KAME node has no IPv4 compatible
1.66 itojun 221: # support. Under RFC1933, it should transmit native IPv6
222: # packets toward IPv4 compatible destination, hoping it would
223: # reach a router that forwards the packet toward auto-tunnel
224: # interface.
1.77 deraadt 225: # (2) An IPv6-only node originates a packet to an IPv4 compatible
1.66 itojun 226: # destination. A KAME node is acting as an IPv6 router, and
227: # asked to forward it.
1.77 deraadt 228: # Due to rare use of IPv4 compatible addresses, and security issues
1.66 itojun 229: # with it, we disable it by default.
1.98 deraadt 230: route -qn add -inet6 ::0.0.0.0 -prefixlen 96 ::1 -reject > /dev/null
1.56 itojun 231:
232: rtsolif=""
1.54 itojun 233: else
234: ip6kernel=NO
235: fi
236:
1.105 todd 237:
238: # Configure all the non-loopback interfaces which we know about, but
1.127 deraadt 239: # do not start interfaces which must be delayed. Refer to hostname.if(5)
1.132 mpf 240: ifmstart "" "trunk svlan vlan carp gif gre pfsync pppoe tun bridge"
1.56 itojun 241:
1.118 brad 242: # The trunk interfaces need to come up first in this list.
1.132 mpf 243: # The (s)vlan interfaces need to come up after trunk.
1.118 brad 244: # Configure all the carp interfaces which we know about before default route.
1.132 mpf 245: ifmstart "trunk svlan vlan carp"
1.118 brad 246:
1.56 itojun 247: if [ "$ip6kernel" = "YES" -a "x$rtsolif" != "x" ]; then
248: fw=`sysctl -n net.inet6.ip6.forwarding`
249: ra=`sysctl -n net.inet6.ip6.accept_rtadv`
250: if [ "x$fw" = "x0" -a "x$ra" = "x1" ]; then
1.57 itojun 251: echo "IPv6 autoconf:$rtsolif"
1.56 itojun 252: rtsol $rtsolif
253: else
254: echo "WARNING: inconsistent config - check /etc/sysctl.conf for IPv6 autoconf"
255: fi
1.57 itojun 256: fi
1.102 mcbride 257:
1.14 deraadt 258: # /etc/mygate, if it exists, contains the name of my gateway host
259: # that name must be in /etc/hosts.
1.110 todd 260: [[ -z $dhcpif ]] && stripcom /etc/mygate | while read gw; do
261: [[ $gw == @(*:*) ]] && continue
262: route -qn delete default > /dev/null 2>&1
263: route -qn add -host default $gw && break
264: done
265: [[ -z $rtsolif ]] && stripcom /etc/mygate | while read gw; do
266: [[ $gw == !(*:*) ]] && continue
267: route -qn delete -inet6 default > /dev/null 2>&1
268: route -qn add -host -inet6 default $gw && break
269: done
1.44 deraadt 270:
1.48 niklas 271: # Multicast routing.
272: #
273: # The routing to the 224.0.0.0/4 net is setup according to these rules:
274: # multicast_host multicast_router route comment
275: # NO NO -reject no multicast
276: # NO YES none installed daemon will run
277: # YES/interface NO -interface YES=def. iface
278: # Any other combination -reject config error
1.112 reyk 279: route -qn delete 224.0.0.0/4 > /dev/null 2>&1
1.48 niklas 280: case "$multicast_host:$multicast_router" in
281: NO:NO)
1.91 deraadt 282: route -qn add -net 224.0.0.0/4 -interface 127.0.0.1 -reject > /dev/null
1.67 deraadt 283: ;;
1.48 niklas 284: NO:YES)
285: ;;
286: *:NO)
1.112 reyk 287: maddr=`if [ "$multicast_host" = "YES" ]; then
1.91 deraadt 288: ed -s '!route -qn show -inet' <<EOF
1.48 niklas 289: /^default/p
290: EOF
291: else
292: ed -s "!ifconfig $multicast_host" <<EOF
293: /^ inet /p
294: EOF
1.112 reyk 295: fi 2> /dev/null`
296: if [ "X${maddr}" != "X" ]; then
297: set $maddr
298: route -qn add -net 224.0.0.0/4 -interface $2 > /dev/null
299: else
300: route -qn add -net 224.0.0.0/4 -interface \
301: 127.0.0.1 -reject > /dev/null
302: fi
1.67 deraadt 303: ;;
1.48 niklas 304: *:*)
305: echo 'config error, multicasting disabled until rc.conf is fixed'
1.91 deraadt 306: route -qn add -net 224.0.0.0/4 -interface 127.0.0.1 -reject > /dev/null
1.67 deraadt 307: ;;
1.48 niklas 308: esac
1.83 miod 309:
1.105 todd 310:
1.125 jdixon 311: # Configure PPPoE, GIF, GRE and TUN interfaces, delayed because they require
312: # routes to be set. TUN might depend on PPPoE, and GIF or GRE may depend on
313: # either of them.
1.127 deraadt 314: ifmstart "pppoe tun gif gre bridge"
1.92 deraadt 315:
1.99 itojun 316: # reject 127/8 other than 127.0.0.1
1.92 deraadt 317: route -qn add -net 127 127.0.0.1 -reject > /dev/null
1.116 david 318:
319: if [ "$ip6kernel" = "YES" ]; then
320: # this is to make sure DAD is completed before going further.
1.124 markus 321: count=0
322: while [ $((count++)) -lt 10 -a "x"`sysctl -n net.inet6.ip6.dad_pending` != "x0" ]; do
323: sleep 1
324: done
1.116 david 325: fi
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