Annotation of src/etc/netstart, Revision 1.159
1.1 deraadt 1: #!/bin/sh -
2: #
1.159 ! rpe 3: # $OpenBSD: netstart,v 1.158 2015/10/26 19:24:04 rpe Exp $
1.153 rpe 4:
5: # Turn off Strict Bourne shell mode.
6: set +o sh
1.101 millert 7:
1.146 rpe 8: # Strip comments (and leading/trailing whitespace if IFS is set) from a file
9: # and spew to stdout.
1.101 millert 10: stripcom() {
1.108 todd 11: local _l
1.110 todd 12: [[ -f $1 ]] || return
1.108 todd 13: while read _l; do
14: [[ -n ${_l%%#*} ]] && echo $_l
15: done<$1
1.101 millert 16: }
1.45 millert 17:
1.146 rpe 18: # Start the $1 interface.
1.83 miod 19: ifstart() {
1.84 deraadt 20: if=$1
1.83 miod 21: # Interface names must be alphanumeric only. We check to avoid
22: # configuring backup or temp files, and to catch the "*" case.
1.137 rpe 23: [[ $if != +([[:alpha:]])+([[:digit:]]) ]] && return
1.83 miod 24:
1.119 deraadt 25: file=/etc/hostname.$if
1.121 todd 26: if ! [ -f $file ]; then
27: echo "netstart: $file: No such file or directory"
28: return
29: fi
1.146 rpe 30: # Not using stat(1), we can't rely on having /usr yet.
1.123 sthen 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 $if create) >/dev/null 2>&1 || return
1.83 miod 39:
1.146 rpe 40: # Now parse the hostname.* file.
1.83 miod 41: while :; do
42: if [ "$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,
1.146 rpe 48: # like the read below.
1.83 miod 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
1.146 rpe 56: # $af can be "dhcp", "up", "rtsol", an address family, commands,
57: # or a comment.
1.83 miod 58: case "$af" in
1.146 rpe 59: "#"*|"") # Skip comments and empty lines.
1.83 miod 60: continue
61: ;;
1.146 rpe 62: "!"*) # Parse commands.
1.83 miod 63: cmd="${af#*!} ${name} ${mask} ${bcaddr} ${ext1} ${ext2}"
64: ;;
65: "dhcp")
66: [ "$name" = "NONE" ] && name=
67: [ "$mask" = "NONE" ] && mask=
68: [ "$bcaddr" = "NONE" ] && bcaddr=
1.143 claudio 69: cmd="ifconfig $if $name $mask $bcaddr $ext1 $ext2 down"
1.106 todd 70: cmd="$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
1.146 rpe 80: # Perform a 'shift' of sorts.
1.83 miod 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 $bcaddr"
108: fi
109: ;;
1.128 todd 110: inet6)
111: if [ ! -n "$name" ]; then
112: echo "/etc/hostname.$if: inet6 alone is invalid"
113: return
114: fi
115: [ "$mask" ] && cmd="$cmd prefixlen $mask"
1.83 miod 116: cmd="$cmd $bcaddr"
117: ;;
118: *)
119: cmd="$cmd $mask $bcaddr"
120: ;;
121: esac
1.139 mpi 122: cmd="$cmd $ext1 $ext2"
1.83 miod 123: ;;
124: esac
125: eval "$cmd"
1.147 rpe 126: done </etc/hostname.$if
1.83 miod 127: }
128:
1.105 todd 129: # Start multiple:
1.146 rpe 130: # Usage: ifmstart "if1 if2" "if3 if4"
131: # Start "$1" interfaces in order or all interfaces if empty.
132: # Don't start "$2" interfaces.
1.105 todd 133: ifmstart() {
134: for sif in ${1:-ALL}; do
135: for hn in /etc/hostname.*; do
1.146 rpe 136: # Strip off /etc/hostname. prefix.
1.105 todd 137: if=${hn#/etc/hostname.}
1.149 rpe 138: [ "$if" = "*" ] && continue
1.113 david 139:
1.146 rpe 140: # Skip unwanted ifs.
1.113 david 141: s=""
1.105 todd 142: for xf in $2; do
1.149 rpe 143: [ "$xf" = "${if%%[0-9]*}" ] && s="1" && break
1.105 todd 144: done
1.149 rpe 145: [ "$s" = "1" ] && continue
1.105 todd 146:
1.146 rpe 147: # Start wanted ifs.
1.149 rpe 148: [ "$sif" = "ALL" -o "$sif" = "${if%%[0-9]*}" ] &&
149: ifstart $if
1.105 todd 150: done
151: done
152: }
153:
1.154 sthen 154: # IPv6 autoconf the interfaces in the list at $rtsolif
155: # Usage: ifautoconf
156: ifautoconf() {
1.156 sthen 157: # $ip6kernel will not have been set if we were invoked with a
158: # list of interface names
159: if ifconfig lo0 inet6 >/dev/null 2>&1; then
160: for curif in $rtsolif; do
161: ifconfig $curif inet6 autoconf
162: done
1.154 sthen 163: fi
164: }
165:
1.151 rpe 166: # Get network related vars from rc.conf using the parsing routine from rc.subr.
167: FUNCS_ONLY=1 . /etc/rc.d/rc.subr
1.150 ajacouto 168: _rc_parse_conf
1.1 deraadt 169:
1.83 miod 170: # If we were invoked with a list of interface names, just reconfigure these
171: # interfaces (or bridges) and return.
1.159 ! rpe 172: if (($# > 0)); then
! 173: for _if; do ifstart $_if; done
1.154 sthen 174: ifautoconf
1.83 miod 175: return
176: fi
177:
178: # Otherwise, process with the complete network initialization.
179:
1.146 rpe 180: # /etc/myname contains my symbolic name.
1.159 ! rpe 181: [[ -f /etc/myname ]] && hostname "$(stripcom /etc/myname)"
1.4 dm 182:
1.131 sobrado 183: # Set the address for the loopback interface. Bringing the interface up,
184: # automatically invokes the IPv6 address ::1.
1.129 henning 185: ifconfig lo0 inet 127.0.0.1/8
1.24 kstailey 186:
1.54 itojun 187: if ifconfig lo0 inet6 >/dev/null 2>&1; then
188: # IPv6 configurations.
189: ip6kernel=YES
190:
1.83 miod 191: # Disallow link-local unicast dest without outgoing scope identifiers.
1.147 rpe 192: route -qn add -inet6 fe80:: -prefixlen 10 ::1 -reject >/dev/null
1.66 itojun 193:
1.83 miod 194: # Disallow site-local unicast dest without outgoing scope identifiers.
1.66 itojun 195: # If you configure site-locals without scope id (it is permissible
196: # config for routers that are not on scope boundary), you may want
197: # to comment the line out.
1.147 rpe 198: route -qn add -inet6 fec0:: -prefixlen 10 ::1 -reject >/dev/null
1.66 itojun 199:
1.83 miod 200: # Disallow "internal" addresses to appear on the wire.
1.147 rpe 201: route -qn add -inet6 ::ffff:0.0.0.0 -prefixlen 96 ::1 -reject >/dev/null
1.66 itojun 202:
1.83 miod 203: # Disallow packets to malicious IPv4 compatible prefix.
1.147 rpe 204: route -qn add -inet6 ::224.0.0.0 -prefixlen 100 ::1 -reject >/dev/null
205: route -qn add -inet6 ::127.0.0.0 -prefixlen 104 ::1 -reject >/dev/null
206: route -qn add -inet6 ::0.0.0.0 -prefixlen 104 ::1 -reject >/dev/null
207: route -qn add -inet6 ::255.0.0.0 -prefixlen 104 ::1 -reject >/dev/null
1.66 itojun 208:
1.83 miod 209: # Disallow packets to malicious 6to4 prefix.
1.147 rpe 210: route -qn add -inet6 2002:e000:: -prefixlen 20 ::1 -reject >/dev/null
211: route -qn add -inet6 2002:7f00:: -prefixlen 24 ::1 -reject >/dev/null
212: route -qn add -inet6 2002:0000:: -prefixlen 24 ::1 -reject >/dev/null
213: route -qn add -inet6 2002:ff00:: -prefixlen 24 ::1 -reject >/dev/null
1.115 itojun 214:
215: # Disallow packets without scope identifier.
1.147 rpe 216: route -qn add -inet6 ff01:: -prefixlen 16 ::1 -reject >/dev/null
217: route -qn add -inet6 ff02:: -prefixlen 16 ::1 -reject >/dev/null
1.66 itojun 218:
219: # Completely disallow packets to IPv4 compatible prefix.
1.146 rpe 220: #
1.66 itojun 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.
1.146 rpe 231: #
1.77 deraadt 232: # Due to rare use of IPv4 compatible addresses, and security issues
1.66 itojun 233: # with it, we disable it by default.
1.147 rpe 234: route -qn add -inet6 ::0.0.0.0 -prefixlen 96 ::1 -reject >/dev/null
1.56 itojun 235:
236: rtsolif=""
1.54 itojun 237: else
238: ip6kernel=NO
239: fi
240:
1.105 todd 241:
242: # Configure all the non-loopback interfaces which we know about, but
1.127 deraadt 243: # do not start interfaces which must be delayed. Refer to hostname.if(5)
1.157 claudio 244: ifmstart "" "trunk svlan vlan carp gif gre pfsync pppoe tun tap bridge pflow"
1.56 itojun 245:
1.118 brad 246: # The trunk interfaces need to come up first in this list.
1.132 mpf 247: # The (s)vlan interfaces need to come up after trunk.
1.118 brad 248: # Configure all the carp interfaces which we know about before default route.
1.132 mpf 249: ifmstart "trunk svlan vlan carp"
1.118 brad 250:
1.154 sthen 251: # Now that $rtsolif has been populated, IPv6 autoconf those interfaces
252: ifautoconf
1.102 mcbride 253:
1.138 todd 254: # Look for default routes in /etc/mygate.
1.110 todd 255: [[ -z $dhcpif ]] && stripcom /etc/mygate | while read gw; do
256: [[ $gw == @(*:*) ]] && continue
1.147 rpe 257: route -qn delete default >/dev/null 2>&1
1.110 todd 258: route -qn add -host default $gw && break
259: done
260: [[ -z $rtsolif ]] && stripcom /etc/mygate | while read gw; do
261: [[ $gw == !(*:*) ]] && continue
1.147 rpe 262: route -qn delete -inet6 default >/dev/null 2>&1
1.110 todd 263: route -qn add -host -inet6 default $gw && break
264: done
1.44 deraadt 265:
1.48 niklas 266: # Multicast routing.
267: #
268: # The routing to the 224.0.0.0/4 net is setup according to these rules:
269: # multicast_host multicast_router route comment
270: # NO NO -reject no multicast
271: # NO YES none installed daemon will run
272: # YES/interface NO -interface YES=def. iface
273: # Any other combination -reject config error
1.147 rpe 274: route -qn delete 224.0.0.0/4 >/dev/null 2>&1
1.48 niklas 275: case "$multicast_host:$multicast_router" in
276: NO:NO)
1.147 rpe 277: route -qn add -net 224.0.0.0/4 -interface 127.0.0.1 -reject >/dev/null
1.67 deraadt 278: ;;
1.48 niklas 279: NO:YES)
280: ;;
281: *:NO)
1.159 ! rpe 282: maddr=$(if [[ $multicast_host == YES ]]; then
1.91 deraadt 283: ed -s '!route -qn show -inet' <<EOF
1.48 niklas 284: /^default/p
285: EOF
286: else
287: ed -s "!ifconfig $multicast_host" <<EOF
288: /^ inet /p
289: EOF
1.159 ! rpe 290: fi 2>/dev/null)
! 291: if [[ -n $maddr ]]; then
1.112 reyk 292: set $maddr
1.147 rpe 293: route -qn add -net 224.0.0.0/4 -interface $2 >/dev/null
1.112 reyk 294: else
295: route -qn add -net 224.0.0.0/4 -interface \
1.147 rpe 296: 127.0.0.1 -reject >/dev/null
1.112 reyk 297: fi
1.67 deraadt 298: ;;
1.48 niklas 299: *:*)
300: echo 'config error, multicasting disabled until rc.conf is fixed'
1.147 rpe 301: route -qn add -net 224.0.0.0/4 -interface 127.0.0.1 -reject >/dev/null
1.67 deraadt 302: ;;
1.48 niklas 303: esac
1.83 miod 304:
1.105 todd 305:
1.152 florian 306: # Configure PPPoE, GIF, GRE, TUN and PFLOW interfaces, delayed because they
307: # require routes to be set. TUN might depend on PPPoE, and GIF or GRE may
308: # depend on either of them. PFLOW might bind to ip addresses configured
309: # on either of them.
1.157 claudio 310: ifmstart "pppoe tun tap gif gre bridge pflow"
1.92 deraadt 311:
1.146 rpe 312: # Reject 127/8 other than 127.0.0.1.
1.147 rpe 313: route -qn add -net 127 127.0.0.1 -reject >/dev/null
1.116 david 314:
1.159 ! rpe 315: if [[ $ip6kernel == YES ]]; then
1.146 rpe 316: # This is to make sure DAD is completed before going further.
1.124 markus 317: count=0
1.159 ! rpe 318: while ((count++ < 10 && $(sysctl -n net.inet6.ip6.dad_pending) != 0)); do
1.124 markus 319: sleep 1
320: done
1.116 david 321: fi
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