Annotation of src/etc/netstart, Revision 1.212
1.1 deraadt 1: #!/bin/sh -
2: #
1.212 ! florian 3: # $OpenBSD: netstart,v 1.211 2020/12/23 17:22:07 krw Exp $
1.153 rpe 4:
5: # Turn off Strict Bourne shell mode.
6: set +o sh
1.101 millert 7:
1.198 rpe 8: # Show usage of the netstart script and exit.
9: usage() {
10: print -u2 "usage: ${0##*/} [[-n] interface ...]"
11: exit 1
12: }
13:
1.204 kn 14: # Echo file $1 to stdout. Skip comment lines. Strip leading and trailing
1.173 rpe 15: # whitespace if IFS is set.
1.160 rpe 16: # Usage: stripcom /path/to/file
1.101 millert 17: stripcom() {
1.160 rpe 18: local _file=$1 _line
19:
20: [[ -f $_file ]] || return
21:
22: while read _line; do
23: [[ -n ${_line%%#*} ]] && print -r -- "$_line"
24: done <$_file
1.101 millert 25: }
1.45 millert 26:
1.177 rpe 27: # Parse and "unpack" a hostname.if(5) line given as positional parameters.
28: # Fill the _cmds array with the resulting interface configuration commands.
29: parse_hn_line() {
1.211 krw 30: local _af=0 _name=1 _mask=2 _bc=3 _prefix=2 _c _cmd _prev _daddr _dhcp _i
1.177 rpe 31: set -A _c -- "$@"
32: set -o noglob
33:
34: case ${_c[_af]} in
35: ''|*([[:blank:]])'#'*)
36: return
37: ;;
38: inet) ((${#_c[*]} > 1)) || return
1.212 ! florian 39: if [[ ${_c[_name]} == autoconf ]]; then
! 40: _cmds[${#_cmds[*]}]="ifconfig $_if ${_c[@]}"
! 41: V4_DHCPCONF=true
! 42: return
! 43: fi
1.177 rpe 44: [[ ${_c[_name]} == alias ]] && _mask=3 _bc=4
45: [[ -n ${_c[_mask]} ]] && _c[_mask]="netmask ${_c[_mask]}"
46: if [[ -n ${_c[_bc]} ]]; then
47: _c[_bc]="broadcast ${_c[_bc]}"
48: [[ ${_c[_bc]} == *NONE ]] && _c[_bc]=
49: fi
50: _cmds[${#_cmds[*]}]="ifconfig $_if ${_c[@]}"
51: ;;
52: inet6) ((${#_c[*]} > 1)) || return
53: if [[ ${_c[_name]} == autoconf ]]; then
54: _cmds[${#_cmds[*]}]="ifconfig $_if ${_c[@]}"
1.180 rpe 55: V6_AUTOCONF=true
1.177 rpe 56: return
57: fi
58: [[ ${_c[_name]} == alias ]] && _prefix=3
59: [[ -n ${_c[_prefix]} ]] && _c[_prefix]="prefixlen ${_c[_prefix]}"
60: _cmds[${#_cmds[*]}]="ifconfig $_if ${_c[@]}"
61: ;;
62: dest) ((${#_c[*]} == 2)) && _daddr=${_c[1]} || return
63: _prev=$((${#_cmds[*]} - 1))
64: ((_prev >= 0)) || return
65: set -A _c -- ${_cmds[_prev]}
66: _name=3
67: [[ ${_c[_name]} == alias ]] && _name=4
68: _c[_name]="${_c[_name]} $_daddr"
69: _cmds[$_prev]="${_c[@]}"
70: ;;
1.211 krw 71: dhcp) unset _c[0]
72: _i=1
73: while [[ ${_c[$_i]} == @(-c|-d|-i|-n|-r|-v) ]]; do
74: if [[ ${_c[$_i]} == @(-c|-i) ]]; then
75: _dhcp[${#_dhcp[*]}]=${_c[$_i]}
76: unset _c[$_i]
77: (( _i++ ))
78: fi
79: _dhcp[${#_dhcp[*]}]=${_c[$_i]}
80: unset _c[$_i]
81: (( _i++ ))
82: done
83: ((${#_c[*]} > 0)) && _cmds[${#_cmds[*]}]="ifconfig $_if ${_c[@]}"
84: _cmds[${#_cmds[*]}]="dhclient ${_dhcp[@]} $_if"
1.180 rpe 85: V4_DHCPCONF=true
1.177 rpe 86: ;;
87: '!'*) _cmd=$(print -- "${_c[@]}" | sed 's/\$if/'$_if'/g')
88: _cmds[${#_cmds[*]}]="${_cmd#!}"
89: ;;
90: *) _cmds[${#_cmds[*]}]="ifconfig $_if ${_c[@]}"
91: ;;
92: esac
93: unset _c
1.178 rpe 94: set +o noglob
1.177 rpe 95: }
96:
1.192 rpe 97: # Create interface $1 if it does not yet exist.
1.195 rpe 98: # Usage: ifcreate if1
1.191 dlg 99: ifcreate() {
100: local _if=$1
101:
1.192 rpe 102: { ifconfig $_if || ifconfig $_if create; } >/dev/null 2>&1
1.191 dlg 103: }
104:
1.192 rpe 105: # Create interfaces for network pseudo-devices referred to by hostname.if files.
1.195 rpe 106: # Usage: vifscreate
1.191 dlg 107: vifscreate() {
1.192 rpe 108: local _vif _hn _if
1.191 dlg 109:
1.192 rpe 110: for _vif in $(ifconfig -C); do
1.193 rpe 111: for _hn in /etc/hostname.${_vif}+([[:digit:]]); do
1.191 dlg 112: [[ -f $_hn ]] || continue
113: _if=${_hn#/etc/hostname.}
114:
1.193 rpe 115: if ! ifcreate $_if; then
1.194 rpe 116: print -u2 "${0##*/}: create for '$_if' failed."
1.193 rpe 117: fi
1.191 dlg 118: done
119: done
120: }
121:
1.160 rpe 122: # Start a single interface.
123: # Usage: ifstart if1
1.83 miod 124: ifstart() {
1.187 tb 125: local _if=$1 _hn=/etc/hostname.$1 _cmds _i=0 _line _stat
1.177 rpe 126: set -A _cmds
1.174 rpe 127:
1.83 miod 128: # Interface names must be alphanumeric only. We check to avoid
129: # configuring backup or temp files, and to catch the "*" case.
1.177 rpe 130: [[ $_if != +([[:alpha:]])+([[:digit:]]) ]] && return
1.83 miod 131:
1.185 rpe 132: if [[ ! -f $_hn ]]; then
1.194 rpe 133: print -u2 "${0##*/}: $_hn: No such file or directory."
1.121 todd 134: return
135: fi
1.177 rpe 136:
1.146 rpe 137: # Not using stat(1), we can't rely on having /usr yet.
1.185 rpe 138: set -A _stat -- $(ls -nL $_hn)
1.183 rpe 139: if [[ "${_stat[0]}${_stat[2]}${_stat[3]}" != *---00 ]]; then
1.194 rpe 140: print -u2 "WARNING: $_hn is insecure, fixing permissions."
1.185 rpe 141: chmod -LR o-rwx $_hn
142: chown -LR root:wheel $_hn
1.119 deraadt 143: fi
1.83 miod 144:
1.177 rpe 145: # Check for ifconfig'able interface, except if -n option is specified.
146: if ! $PRINT_ONLY; then
1.191 dlg 147: ifcreate $_if || return
1.177 rpe 148: fi
149:
150: # Parse the hostname.if(5) file and fill _cmds array with interface
151: # configuration commands.
152: set -o noglob
1.205 kn 153: while IFS= read -- _line; do
1.177 rpe 154: parse_hn_line $_line
1.185 rpe 155: done <$_hn
1.177 rpe 156:
157: # Apply the interface configuration commands stored in _cmds array.
158: while ((_i < ${#_cmds[*]})); do
159: if $PRINT_ONLY; then
160: print -r -- "${_cmds[_i]}"
1.83 miod 161: else
1.177 rpe 162: eval "${_cmds[_i]}"
1.83 miod 163: fi
1.177 rpe 164: ((_i++))
165: done
166: unset _cmds
1.178 rpe 167: set +o noglob
1.83 miod 168: }
169:
1.161 rpe 170: # Start multiple interfaces by driver name.
171: # Usage: ifmstart "em iwm" "trunk vlan"
1.146 rpe 172: # Start "$1" interfaces in order or all interfaces if empty.
1.161 rpe 173: # Don't start "$2" interfaces. "$2" is optional.
1.105 todd 174: ifmstart() {
1.161 rpe 175: local _sifs=$1 _xifs=$2 _hn _if _sif _xif
176:
177: for _sif in ${_sifs:-ALL}; do
1.193 rpe 178: for _hn in /etc/hostname.+([[:alpha:]])+([[:digit:]]); do
179: [[ -f $_hn ]] || continue
1.161 rpe 180: _if=${_hn#/etc/hostname.}
1.113 david 181:
1.146 rpe 182: # Skip unwanted ifs.
1.161 rpe 183: for _xif in $_xifs; do
184: [[ $_xif == ${_if%%[0-9]*} ]] && continue 2
1.105 todd 185: done
186:
1.146 rpe 187: # Start wanted ifs.
1.161 rpe 188: [[ $_sif == @(ALL|${_if%%[0-9]*}) ]] && ifstart $_if
1.105 todd 189: done
190: done
191: }
192:
1.195 rpe 193: # Parse /etc/mygate and add default routes for IPv4 and IPv6.
1.172 mpi 194: # Usage: defaultroute
195: defaultroute() {
1.209 tb 196: local _cmd _v4set=false _v6set=false;
1.208 deraadt 197: set -o noglob
1.188 tb 198:
1.208 deraadt 199: stripcom /etc/mygate |
1.180 rpe 200: while read gw; do
1.208 deraadt 201: case $gw in
202: '!'*)
1.209 tb 203: _cmd=$(print -- "$gw")
1.208 deraadt 204: _cmd="${_cmd#!}"
205: ;;
1.209 tb 206: !(*:*))
207: ($_v4set || $V4_DHCPCONF) && continue
208: _cmd="route -qn add -host default $gw"
209: _v4set=true
210: ;;
1.208 deraadt 211: *)
1.209 tb 212: ($_v6set || $V6_AUTOCONF) && continue
213: _cmd="route -qn add -host -inet6 default $gw"
214: _v6set=true
1.208 deraadt 215: ;;
216: esac
1.188 tb 217: if $PRINT_ONLY; then
1.208 deraadt 218: print -r -- "$_cmd"
1.188 tb 219: else
1.208 deraadt 220: $_cmd
1.188 tb 221: fi
1.172 mpi 222: done
1.208 deraadt 223: set +o noglob
1.172 mpi 224: }
1.199 tb 225:
226: # Make sure the invoking user has the right privileges. Check for presence of
227: # id(1) to avoid problems with diskless setups.
228: if [[ -x /usr/bin/id ]] && (($(id -u) != 0)); then
229: echo "${0##*/}: need root privileges"
230: exit 1
231: fi
1.154 sthen 232:
1.151 rpe 233: # Get network related vars from rc.conf using the parsing routine from rc.subr.
234: FUNCS_ONLY=1 . /etc/rc.d/rc.subr
1.150 ajacouto 235: _rc_parse_conf
1.177 rpe 236:
237: PRINT_ONLY=false
1.180 rpe 238: V4_DHCPCONF=false
239: V6_AUTOCONF=false
240:
1.177 rpe 241: while getopts ":n" opt; do
242: case $opt in
243: n) PRINT_ONLY=true;;
1.198 rpe 244: *) usage;;
1.177 rpe 245: esac
246: done
247: shift $((OPTIND-1))
248:
249: # Option -n is only supported if interface names are specified as parameters.
1.198 rpe 250: $PRINT_ONLY && (($# == 0)) && usage
1.189 florian 251:
1.195 rpe 252: # Load key material for the generation of IPv6 Semantically Opaque Interface
253: # Identifiers (SOII) used for link local and SLAAC addresses.
1.189 florian 254: $PRINT_ONLY || [[ ! -f /etc/soii.key ]] ||
255: sysctl -q "net.inet6.ip6.soiikey=$(</etc/soii.key)"
1.1 deraadt 256:
1.83 miod 257: # If we were invoked with a list of interface names, just reconfigure these
1.172 mpi 258: # interfaces (or bridges), add default routes and return.
1.159 rpe 259: if (($# > 0)); then
260: for _if; do ifstart $_if; done
1.172 mpi 261: defaultroute
1.83 miod 262: return
263: fi
264:
265: # Otherwise, process with the complete network initialization.
1.4 dm 266:
1.131 sobrado 267: # Set the address for the loopback interface. Bringing the interface up,
268: # automatically invokes the IPv6 address ::1.
1.129 henning 269: ifconfig lo0 inet 127.0.0.1/8
1.24 kstailey 270:
1.195 rpe 271: # IPv6 configuration.
1.54 itojun 272: if ifconfig lo0 inet6 >/dev/null 2>&1; then
273: ip6kernel=YES
274:
1.83 miod 275: # Disallow link-local unicast dest without outgoing scope identifiers.
1.202 kn 276: route -qn add -inet6 fe80:: -prefixlen 10 ::1 -reject
1.66 itojun 277:
1.83 miod 278: # Disallow site-local unicast dest without outgoing scope identifiers.
1.66 itojun 279: # If you configure site-locals without scope id (it is permissible
280: # config for routers that are not on scope boundary), you may want
281: # to comment the line out.
1.202 kn 282: route -qn add -inet6 fec0:: -prefixlen 10 ::1 -reject
1.66 itojun 283:
1.83 miod 284: # Disallow "internal" addresses to appear on the wire.
1.202 kn 285: route -qn add -inet6 ::ffff:0.0.0.0 -prefixlen 96 ::1 -reject
1.66 itojun 286:
1.83 miod 287: # Disallow packets to malicious 6to4 prefix.
1.202 kn 288: route -qn add -inet6 2002:e000:: -prefixlen 20 ::1 -reject
289: route -qn add -inet6 2002:7f00:: -prefixlen 24 ::1 -reject
290: route -qn add -inet6 2002:0000:: -prefixlen 24 ::1 -reject
291: route -qn add -inet6 2002:ff00:: -prefixlen 24 ::1 -reject
1.115 itojun 292:
293: # Disallow packets without scope identifier.
1.202 kn 294: route -qn add -inet6 ff01:: -prefixlen 16 ::1 -reject
295: route -qn add -inet6 ff02:: -prefixlen 16 ::1 -reject
1.66 itojun 296:
297: # Completely disallow packets to IPv4 compatible prefix.
1.146 rpe 298: #
1.66 itojun 299: # This may conflict with RFC1933 under following circumstances:
300: # (1) An IPv6-only KAME node tries to originate packets to IPv4
1.77 deraadt 301: # compatible destination. The KAME node has no IPv4 compatible
1.66 itojun 302: # support. Under RFC1933, it should transmit native IPv6
303: # packets toward IPv4 compatible destination, hoping it would
304: # reach a router that forwards the packet toward auto-tunnel
305: # interface.
1.77 deraadt 306: # (2) An IPv6-only node originates a packet to an IPv4 compatible
1.66 itojun 307: # destination. A KAME node is acting as an IPv6 router, and
308: # asked to forward it.
1.146 rpe 309: #
1.77 deraadt 310: # Due to rare use of IPv4 compatible addresses, and security issues
1.66 itojun 311: # with it, we disable it by default.
1.202 kn 312: route -qn add -inet6 ::0.0.0.0 -prefixlen 96 ::1 -reject
1.54 itojun 313: else
314: ip6kernel=NO
315: fi
316:
1.195 rpe 317: # Create all the pseudo interfaces up front.
1.191 dlg 318: vifscreate
1.105 todd 319:
320: # Configure all the non-loopback interfaces which we know about, but
1.127 deraadt 321: # do not start interfaces which must be delayed. Refer to hostname.if(5)
1.207 jmc 322: ifmstart "" "aggr trunk svlan vlan carp pppoe tun tap gif etherip gre egre pflow wg"
1.56 itojun 323:
1.201 dlg 324: # The aggr and trunk interfaces need to come up first in this list.
1.132 mpf 325: # The (s)vlan interfaces need to come up after trunk.
1.118 brad 326: # Configure all the carp interfaces which we know about before default route.
1.201 dlg 327: ifmstart "aggr trunk svlan vlan carp pppoe"
1.102 mcbride 328:
1.195 rpe 329: # Set default routes for IPv4 and IPv6.
1.172 mpi 330: defaultroute
1.44 deraadt 331:
1.48 niklas 332: # Multicast routing.
1.168 sthen 333: if [[ $multicast != YES ]]; then
334: route -qn delete 224.0.0.0/4 >/dev/null 2>&1
1.147 rpe 335: route -qn add -net 224.0.0.0/4 -interface 127.0.0.1 -reject >/dev/null
1.168 sthen 336: fi
1.105 todd 337:
1.146 rpe 338: # Reject 127/8 other than 127.0.0.1.
1.147 rpe 339: route -qn add -net 127 127.0.0.1 -reject >/dev/null
1.191 dlg 340:
341: # Configure interfaces that rely on routing
1.207 jmc 342: ifmstart "tun tap gif etherip gre egre pflow wg"
1.116 david 343:
1.159 rpe 344: if [[ $ip6kernel == YES ]]; then
1.195 rpe 345: # Ensure IPv6 Duplicate Address Detection (DAD) is completed.
1.124 markus 346: count=0
1.159 rpe 347: while ((count++ < 10 && $(sysctl -n net.inet6.ip6.dad_pending) != 0)); do
1.124 markus 348: sleep 1
349: done
1.116 david 350: fi
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