Annotation of src/etc/netstart, Revision 1.213
1.1 deraadt 1: #!/bin/sh -
2: #
1.213 ! florian 3: # $OpenBSD: netstart,v 1.212 2021/06/20 08:31:03 florian 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]="${_c[@]}"
70: ;;
1.213 ! florian 71: dhcp) _cmds[${#_cmds[*]}]="ifconfig $_if inet autoconf"
! 72: V4_AUTOCONF=true
1.177 rpe 73: ;;
74: '!'*) _cmd=$(print -- "${_c[@]}" | sed 's/\$if/'$_if'/g')
75: _cmds[${#_cmds[*]}]="${_cmd#!}"
76: ;;
77: *) _cmds[${#_cmds[*]}]="ifconfig $_if ${_c[@]}"
78: ;;
79: esac
80: unset _c
1.178 rpe 81: set +o noglob
1.177 rpe 82: }
83:
1.192 rpe 84: # Create interface $1 if it does not yet exist.
1.195 rpe 85: # Usage: ifcreate if1
1.191 dlg 86: ifcreate() {
87: local _if=$1
88:
1.192 rpe 89: { ifconfig $_if || ifconfig $_if create; } >/dev/null 2>&1
1.191 dlg 90: }
91:
1.192 rpe 92: # Create interfaces for network pseudo-devices referred to by hostname.if files.
1.195 rpe 93: # Usage: vifscreate
1.191 dlg 94: vifscreate() {
1.192 rpe 95: local _vif _hn _if
1.191 dlg 96:
1.192 rpe 97: for _vif in $(ifconfig -C); do
1.193 rpe 98: for _hn in /etc/hostname.${_vif}+([[:digit:]]); do
1.191 dlg 99: [[ -f $_hn ]] || continue
100: _if=${_hn#/etc/hostname.}
101:
1.193 rpe 102: if ! ifcreate $_if; then
1.194 rpe 103: print -u2 "${0##*/}: create for '$_if' failed."
1.193 rpe 104: fi
1.191 dlg 105: done
106: done
107: }
108:
1.160 rpe 109: # Start a single interface.
110: # Usage: ifstart if1
1.83 miod 111: ifstart() {
1.187 tb 112: local _if=$1 _hn=/etc/hostname.$1 _cmds _i=0 _line _stat
1.177 rpe 113: set -A _cmds
1.174 rpe 114:
1.83 miod 115: # Interface names must be alphanumeric only. We check to avoid
116: # configuring backup or temp files, and to catch the "*" case.
1.177 rpe 117: [[ $_if != +([[:alpha:]])+([[:digit:]]) ]] && return
1.83 miod 118:
1.185 rpe 119: if [[ ! -f $_hn ]]; then
1.194 rpe 120: print -u2 "${0##*/}: $_hn: No such file or directory."
1.121 todd 121: return
122: fi
1.177 rpe 123:
1.146 rpe 124: # Not using stat(1), we can't rely on having /usr yet.
1.185 rpe 125: set -A _stat -- $(ls -nL $_hn)
1.183 rpe 126: if [[ "${_stat[0]}${_stat[2]}${_stat[3]}" != *---00 ]]; then
1.194 rpe 127: print -u2 "WARNING: $_hn is insecure, fixing permissions."
1.185 rpe 128: chmod -LR o-rwx $_hn
129: chown -LR root:wheel $_hn
1.119 deraadt 130: fi
1.83 miod 131:
1.177 rpe 132: # Check for ifconfig'able interface, except if -n option is specified.
133: if ! $PRINT_ONLY; then
1.191 dlg 134: ifcreate $_if || return
1.177 rpe 135: fi
136:
137: # Parse the hostname.if(5) file and fill _cmds array with interface
138: # configuration commands.
139: set -o noglob
1.205 kn 140: while IFS= read -- _line; do
1.177 rpe 141: parse_hn_line $_line
1.185 rpe 142: done <$_hn
1.177 rpe 143:
144: # Apply the interface configuration commands stored in _cmds array.
145: while ((_i < ${#_cmds[*]})); do
146: if $PRINT_ONLY; then
147: print -r -- "${_cmds[_i]}"
1.83 miod 148: else
1.177 rpe 149: eval "${_cmds[_i]}"
1.83 miod 150: fi
1.177 rpe 151: ((_i++))
152: done
153: unset _cmds
1.178 rpe 154: set +o noglob
1.83 miod 155: }
156:
1.161 rpe 157: # Start multiple interfaces by driver name.
158: # Usage: ifmstart "em iwm" "trunk vlan"
1.146 rpe 159: # Start "$1" interfaces in order or all interfaces if empty.
1.161 rpe 160: # Don't start "$2" interfaces. "$2" is optional.
1.105 todd 161: ifmstart() {
1.161 rpe 162: local _sifs=$1 _xifs=$2 _hn _if _sif _xif
163:
164: for _sif in ${_sifs:-ALL}; do
1.193 rpe 165: for _hn in /etc/hostname.+([[:alpha:]])+([[:digit:]]); do
166: [[ -f $_hn ]] || continue
1.161 rpe 167: _if=${_hn#/etc/hostname.}
1.113 david 168:
1.146 rpe 169: # Skip unwanted ifs.
1.161 rpe 170: for _xif in $_xifs; do
171: [[ $_xif == ${_if%%[0-9]*} ]] && continue 2
1.105 todd 172: done
173:
1.146 rpe 174: # Start wanted ifs.
1.161 rpe 175: [[ $_sif == @(ALL|${_if%%[0-9]*}) ]] && ifstart $_if
1.105 todd 176: done
177: done
178: }
179:
1.195 rpe 180: # Parse /etc/mygate and add default routes for IPv4 and IPv6.
1.172 mpi 181: # Usage: defaultroute
182: defaultroute() {
1.209 tb 183: local _cmd _v4set=false _v6set=false;
1.208 deraadt 184: set -o noglob
1.188 tb 185:
1.208 deraadt 186: stripcom /etc/mygate |
1.180 rpe 187: while read gw; do
1.208 deraadt 188: case $gw in
189: '!'*)
1.209 tb 190: _cmd=$(print -- "$gw")
1.208 deraadt 191: _cmd="${_cmd#!}"
192: ;;
1.209 tb 193: !(*:*))
194: ($_v4set || $V4_DHCPCONF) && continue
195: _cmd="route -qn add -host default $gw"
196: _v4set=true
197: ;;
1.208 deraadt 198: *)
1.209 tb 199: ($_v6set || $V6_AUTOCONF) && continue
200: _cmd="route -qn add -host -inet6 default $gw"
201: _v6set=true
1.208 deraadt 202: ;;
203: esac
1.188 tb 204: if $PRINT_ONLY; then
1.208 deraadt 205: print -r -- "$_cmd"
1.188 tb 206: else
1.208 deraadt 207: $_cmd
1.188 tb 208: fi
1.172 mpi 209: done
1.208 deraadt 210: set +o noglob
1.172 mpi 211: }
1.199 tb 212:
213: # Make sure the invoking user has the right privileges. Check for presence of
214: # id(1) to avoid problems with diskless setups.
215: if [[ -x /usr/bin/id ]] && (($(id -u) != 0)); then
216: echo "${0##*/}: need root privileges"
217: exit 1
218: fi
1.154 sthen 219:
1.151 rpe 220: # Get network related vars from rc.conf using the parsing routine from rc.subr.
221: FUNCS_ONLY=1 . /etc/rc.d/rc.subr
1.150 ajacouto 222: _rc_parse_conf
1.177 rpe 223:
224: PRINT_ONLY=false
1.180 rpe 225: V4_DHCPCONF=false
226: V6_AUTOCONF=false
227:
1.177 rpe 228: while getopts ":n" opt; do
229: case $opt in
230: n) PRINT_ONLY=true;;
1.198 rpe 231: *) usage;;
1.177 rpe 232: esac
233: done
234: shift $((OPTIND-1))
235:
236: # Option -n is only supported if interface names are specified as parameters.
1.198 rpe 237: $PRINT_ONLY && (($# == 0)) && usage
1.189 florian 238:
1.195 rpe 239: # Load key material for the generation of IPv6 Semantically Opaque Interface
240: # Identifiers (SOII) used for link local and SLAAC addresses.
1.189 florian 241: $PRINT_ONLY || [[ ! -f /etc/soii.key ]] ||
242: sysctl -q "net.inet6.ip6.soiikey=$(</etc/soii.key)"
1.1 deraadt 243:
1.83 miod 244: # If we were invoked with a list of interface names, just reconfigure these
1.172 mpi 245: # interfaces (or bridges), add default routes and return.
1.159 rpe 246: if (($# > 0)); then
247: for _if; do ifstart $_if; done
1.172 mpi 248: defaultroute
1.83 miod 249: return
250: fi
251:
252: # Otherwise, process with the complete network initialization.
1.4 dm 253:
1.131 sobrado 254: # Set the address for the loopback interface. Bringing the interface up,
255: # automatically invokes the IPv6 address ::1.
1.129 henning 256: ifconfig lo0 inet 127.0.0.1/8
1.24 kstailey 257:
1.195 rpe 258: # IPv6 configuration.
1.54 itojun 259: if ifconfig lo0 inet6 >/dev/null 2>&1; then
260: ip6kernel=YES
261:
1.83 miod 262: # Disallow link-local unicast dest without outgoing scope identifiers.
1.202 kn 263: route -qn add -inet6 fe80:: -prefixlen 10 ::1 -reject
1.66 itojun 264:
1.83 miod 265: # Disallow site-local unicast dest without outgoing scope identifiers.
1.66 itojun 266: # If you configure site-locals without scope id (it is permissible
267: # config for routers that are not on scope boundary), you may want
268: # to comment the line out.
1.202 kn 269: route -qn add -inet6 fec0:: -prefixlen 10 ::1 -reject
1.66 itojun 270:
1.83 miod 271: # Disallow "internal" addresses to appear on the wire.
1.202 kn 272: route -qn add -inet6 ::ffff:0.0.0.0 -prefixlen 96 ::1 -reject
1.66 itojun 273:
1.83 miod 274: # Disallow packets to malicious 6to4 prefix.
1.202 kn 275: route -qn add -inet6 2002:e000:: -prefixlen 20 ::1 -reject
276: route -qn add -inet6 2002:7f00:: -prefixlen 24 ::1 -reject
277: route -qn add -inet6 2002:0000:: -prefixlen 24 ::1 -reject
278: route -qn add -inet6 2002:ff00:: -prefixlen 24 ::1 -reject
1.115 itojun 279:
280: # Disallow packets without scope identifier.
1.202 kn 281: route -qn add -inet6 ff01:: -prefixlen 16 ::1 -reject
282: route -qn add -inet6 ff02:: -prefixlen 16 ::1 -reject
1.66 itojun 283:
284: # Completely disallow packets to IPv4 compatible prefix.
1.146 rpe 285: #
1.66 itojun 286: # This may conflict with RFC1933 under following circumstances:
287: # (1) An IPv6-only KAME node tries to originate packets to IPv4
1.77 deraadt 288: # compatible destination. The KAME node has no IPv4 compatible
1.66 itojun 289: # support. Under RFC1933, it should transmit native IPv6
290: # packets toward IPv4 compatible destination, hoping it would
291: # reach a router that forwards the packet toward auto-tunnel
292: # interface.
1.77 deraadt 293: # (2) An IPv6-only node originates a packet to an IPv4 compatible
1.66 itojun 294: # destination. A KAME node is acting as an IPv6 router, and
295: # asked to forward it.
1.146 rpe 296: #
1.77 deraadt 297: # Due to rare use of IPv4 compatible addresses, and security issues
1.66 itojun 298: # with it, we disable it by default.
1.202 kn 299: route -qn add -inet6 ::0.0.0.0 -prefixlen 96 ::1 -reject
1.54 itojun 300: else
301: ip6kernel=NO
302: fi
303:
1.195 rpe 304: # Create all the pseudo interfaces up front.
1.191 dlg 305: vifscreate
1.105 todd 306:
307: # Configure all the non-loopback interfaces which we know about, but
1.127 deraadt 308: # do not start interfaces which must be delayed. Refer to hostname.if(5)
1.207 jmc 309: ifmstart "" "aggr trunk svlan vlan carp pppoe tun tap gif etherip gre egre pflow wg"
1.56 itojun 310:
1.201 dlg 311: # The aggr and trunk interfaces need to come up first in this list.
1.132 mpf 312: # The (s)vlan interfaces need to come up after trunk.
1.118 brad 313: # Configure all the carp interfaces which we know about before default route.
1.201 dlg 314: ifmstart "aggr trunk svlan vlan carp pppoe"
1.102 mcbride 315:
1.195 rpe 316: # Set default routes for IPv4 and IPv6.
1.172 mpi 317: defaultroute
1.44 deraadt 318:
1.48 niklas 319: # Multicast routing.
1.168 sthen 320: if [[ $multicast != YES ]]; then
321: route -qn delete 224.0.0.0/4 >/dev/null 2>&1
1.147 rpe 322: route -qn add -net 224.0.0.0/4 -interface 127.0.0.1 -reject >/dev/null
1.168 sthen 323: fi
1.105 todd 324:
1.146 rpe 325: # Reject 127/8 other than 127.0.0.1.
1.147 rpe 326: route -qn add -net 127 127.0.0.1 -reject >/dev/null
1.191 dlg 327:
328: # Configure interfaces that rely on routing
1.207 jmc 329: ifmstart "tun tap gif etherip gre egre pflow wg"
1.116 david 330:
1.159 rpe 331: if [[ $ip6kernel == YES ]]; then
1.195 rpe 332: # Ensure IPv6 Duplicate Address Detection (DAD) is completed.
1.124 markus 333: count=0
1.159 rpe 334: while ((count++ < 10 && $(sysctl -n net.inet6.ip6.dad_pending) != 0)); do
1.124 markus 335: sleep 1
336: done
1.116 david 337: fi
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