Annotation of src/etc/netstart, Revision 1.208
1.1 deraadt 1: #!/bin/sh -
2: #
1.208 ! deraadt 3: # $OpenBSD: netstart,v 1.207 2020/11/08 16:51:43 jmc 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 <$_file
1.101 millert 25: }
1.45 millert 26:
1.177 rpe 27: # Parse and "unpack" a hostname.if(5) line given as positional parameters.
28: # Fill the _cmds array with the resulting interface configuration commands.
29: parse_hn_line() {
30: local _af=0 _name=1 _mask=2 _bc=3 _prefix=2 _c _cmd _prev _daddr
31: set -A _c -- "$@"
32: set -o noglob
33:
34: case ${_c[_af]} in
35: ''|*([[:blank:]])'#'*)
36: return
37: ;;
38: inet) ((${#_c[*]} > 1)) || return
39: [[ ${_c[_name]} == alias ]] && _mask=3 _bc=4
40: [[ -n ${_c[_mask]} ]] && _c[_mask]="netmask ${_c[_mask]}"
41: if [[ -n ${_c[_bc]} ]]; then
42: _c[_bc]="broadcast ${_c[_bc]}"
43: [[ ${_c[_bc]} == *NONE ]] && _c[_bc]=
44: fi
45: _cmds[${#_cmds[*]}]="ifconfig $_if ${_c[@]}"
46: ;;
47: inet6) ((${#_c[*]} > 1)) || return
48: if [[ ${_c[_name]} == autoconf ]]; then
49: _cmds[${#_cmds[*]}]="ifconfig $_if ${_c[@]}"
1.180 rpe 50: V6_AUTOCONF=true
1.177 rpe 51: return
52: fi
53: [[ ${_c[_name]} == alias ]] && _prefix=3
54: [[ -n ${_c[_prefix]} ]] && _c[_prefix]="prefixlen ${_c[_prefix]}"
55: _cmds[${#_cmds[*]}]="ifconfig $_if ${_c[@]}"
56: ;;
57: dest) ((${#_c[*]} == 2)) && _daddr=${_c[1]} || return
58: _prev=$((${#_cmds[*]} - 1))
59: ((_prev >= 0)) || return
60: set -A _c -- ${_cmds[_prev]}
61: _name=3
62: [[ ${_c[_name]} == alias ]] && _name=4
63: _c[_name]="${_c[_name]} $_daddr"
64: _cmds[$_prev]="${_c[@]}"
65: ;;
66: dhcp) _c[0]=
1.200 krw 67: _cmds[${#_cmds[*]}]="ifconfig $_if ${_c[@]} up;dhclient $_if"
1.180 rpe 68: V4_DHCPCONF=true
1.177 rpe 69: ;;
70: '!'*) _cmd=$(print -- "${_c[@]}" | sed 's/\$if/'$_if'/g')
71: _cmds[${#_cmds[*]}]="${_cmd#!}"
72: ;;
73: *) _cmds[${#_cmds[*]}]="ifconfig $_if ${_c[@]}"
74: ;;
75: esac
76: unset _c
1.178 rpe 77: set +o noglob
1.177 rpe 78: }
79:
1.192 rpe 80: # Create interface $1 if it does not yet exist.
1.195 rpe 81: # Usage: ifcreate if1
1.191 dlg 82: ifcreate() {
83: local _if=$1
84:
1.192 rpe 85: { ifconfig $_if || ifconfig $_if create; } >/dev/null 2>&1
1.191 dlg 86: }
87:
1.192 rpe 88: # Create interfaces for network pseudo-devices referred to by hostname.if files.
1.195 rpe 89: # Usage: vifscreate
1.191 dlg 90: vifscreate() {
1.192 rpe 91: local _vif _hn _if
1.191 dlg 92:
1.192 rpe 93: for _vif in $(ifconfig -C); do
1.193 rpe 94: for _hn in /etc/hostname.${_vif}+([[:digit:]]); do
1.191 dlg 95: [[ -f $_hn ]] || continue
96: _if=${_hn#/etc/hostname.}
97:
1.193 rpe 98: if ! ifcreate $_if; then
1.194 rpe 99: print -u2 "${0##*/}: create for '$_if' failed."
1.193 rpe 100: fi
1.191 dlg 101: done
102: done
103: }
104:
1.160 rpe 105: # Start a single interface.
106: # Usage: ifstart if1
1.83 miod 107: ifstart() {
1.187 tb 108: local _if=$1 _hn=/etc/hostname.$1 _cmds _i=0 _line _stat
1.177 rpe 109: set -A _cmds
1.174 rpe 110:
1.83 miod 111: # Interface names must be alphanumeric only. We check to avoid
112: # configuring backup or temp files, and to catch the "*" case.
1.177 rpe 113: [[ $_if != +([[:alpha:]])+([[:digit:]]) ]] && return
1.83 miod 114:
1.185 rpe 115: if [[ ! -f $_hn ]]; then
1.194 rpe 116: print -u2 "${0##*/}: $_hn: No such file or directory."
1.121 todd 117: return
118: fi
1.177 rpe 119:
1.146 rpe 120: # Not using stat(1), we can't rely on having /usr yet.
1.185 rpe 121: set -A _stat -- $(ls -nL $_hn)
1.183 rpe 122: if [[ "${_stat[0]}${_stat[2]}${_stat[3]}" != *---00 ]]; then
1.194 rpe 123: print -u2 "WARNING: $_hn is insecure, fixing permissions."
1.185 rpe 124: chmod -LR o-rwx $_hn
125: chown -LR root:wheel $_hn
1.119 deraadt 126: fi
1.83 miod 127:
1.177 rpe 128: # Check for ifconfig'able interface, except if -n option is specified.
129: if ! $PRINT_ONLY; then
1.191 dlg 130: ifcreate $_if || return
1.177 rpe 131: fi
132:
133: # Parse the hostname.if(5) file and fill _cmds array with interface
134: # configuration commands.
135: set -o noglob
1.205 kn 136: while IFS= read -- _line; do
1.177 rpe 137: parse_hn_line $_line
1.185 rpe 138: done <$_hn
1.177 rpe 139:
140: # Apply the interface configuration commands stored in _cmds array.
141: while ((_i < ${#_cmds[*]})); do
142: if $PRINT_ONLY; then
143: print -r -- "${_cmds[_i]}"
1.83 miod 144: else
1.177 rpe 145: eval "${_cmds[_i]}"
1.83 miod 146: fi
1.177 rpe 147: ((_i++))
148: done
149: unset _cmds
1.178 rpe 150: set +o noglob
1.83 miod 151: }
152:
1.161 rpe 153: # Start multiple interfaces by driver name.
154: # Usage: ifmstart "em iwm" "trunk vlan"
1.146 rpe 155: # Start "$1" interfaces in order or all interfaces if empty.
1.161 rpe 156: # Don't start "$2" interfaces. "$2" is optional.
1.105 todd 157: ifmstart() {
1.161 rpe 158: local _sifs=$1 _xifs=$2 _hn _if _sif _xif
159:
160: for _sif in ${_sifs:-ALL}; do
1.193 rpe 161: for _hn in /etc/hostname.+([[:alpha:]])+([[:digit:]]); do
162: [[ -f $_hn ]] || continue
1.161 rpe 163: _if=${_hn#/etc/hostname.}
1.113 david 164:
1.146 rpe 165: # Skip unwanted ifs.
1.161 rpe 166: for _xif in $_xifs; do
167: [[ $_xif == ${_if%%[0-9]*} ]] && continue 2
1.105 todd 168: done
169:
1.146 rpe 170: # Start wanted ifs.
1.161 rpe 171: [[ $_sif == @(ALL|${_if%%[0-9]*}) ]] && ifstart $_if
1.105 todd 172: done
173: done
174: }
175:
1.195 rpe 176: # Parse /etc/mygate and add default routes for IPv4 and IPv6.
1.172 mpi 177: # Usage: defaultroute
178: defaultroute() {
1.188 tb 179: local _cmd;
1.208 ! deraadt 180: set -o noglob
1.188 tb 181:
1.208 ! deraadt 182: stripcom /etc/mygate |
1.180 rpe 183: while read gw; do
1.208 ! deraadt 184: case $gw in
! 185: '!'*)
! 186: _cmd=$(print -- "$gw" | sed 's/\$if/'$_if'/g')
! 187: _cmd="${_cmd#!}"
! 188: ;;
! 189: *)
! 190: if [[ $gw != @(*:*) ]]; then
! 191: $V4_DHCPCONF && continue
! 192: _cmd="route -qn add -host default $gw"
! 193: elif [[ $gw == @(*:*) ]]; then
! 194: $V6_AUTOCONF && continue
! 195: _cmd="route -qn add -host -inet6 default $gw"
! 196: fi
! 197: ;;
! 198: esac
1.188 tb 199: if $PRINT_ONLY; then
1.208 ! deraadt 200: print -r -- "$_cmd"
1.188 tb 201: else
1.208 ! deraadt 202: $_cmd
1.188 tb 203: fi
1.172 mpi 204: done
1.208 ! deraadt 205: set +o noglob
1.172 mpi 206: }
1.199 tb 207:
208: # Make sure the invoking user has the right privileges. Check for presence of
209: # id(1) to avoid problems with diskless setups.
210: if [[ -x /usr/bin/id ]] && (($(id -u) != 0)); then
211: echo "${0##*/}: need root privileges"
212: exit 1
213: fi
1.154 sthen 214:
1.151 rpe 215: # Get network related vars from rc.conf using the parsing routine from rc.subr.
216: FUNCS_ONLY=1 . /etc/rc.d/rc.subr
1.150 ajacouto 217: _rc_parse_conf
1.177 rpe 218:
219: PRINT_ONLY=false
1.180 rpe 220: V4_DHCPCONF=false
221: V6_AUTOCONF=false
222:
1.177 rpe 223: while getopts ":n" opt; do
224: case $opt in
225: n) PRINT_ONLY=true;;
1.198 rpe 226: *) usage;;
1.177 rpe 227: esac
228: done
229: shift $((OPTIND-1))
230:
231: # Option -n is only supported if interface names are specified as parameters.
1.198 rpe 232: $PRINT_ONLY && (($# == 0)) && usage
1.189 florian 233:
1.195 rpe 234: # Load key material for the generation of IPv6 Semantically Opaque Interface
235: # Identifiers (SOII) used for link local and SLAAC addresses.
1.189 florian 236: $PRINT_ONLY || [[ ! -f /etc/soii.key ]] ||
237: sysctl -q "net.inet6.ip6.soiikey=$(</etc/soii.key)"
1.1 deraadt 238:
1.83 miod 239: # If we were invoked with a list of interface names, just reconfigure these
1.172 mpi 240: # interfaces (or bridges), add default routes and return.
1.159 rpe 241: if (($# > 0)); then
242: for _if; do ifstart $_if; done
1.172 mpi 243: defaultroute
1.83 miod 244: return
245: fi
246:
247: # Otherwise, process with the complete network initialization.
1.4 dm 248:
1.131 sobrado 249: # Set the address for the loopback interface. Bringing the interface up,
250: # automatically invokes the IPv6 address ::1.
1.129 henning 251: ifconfig lo0 inet 127.0.0.1/8
1.24 kstailey 252:
1.195 rpe 253: # IPv6 configuration.
1.54 itojun 254: if ifconfig lo0 inet6 >/dev/null 2>&1; then
255: ip6kernel=YES
256:
1.83 miod 257: # Disallow link-local unicast dest without outgoing scope identifiers.
1.202 kn 258: route -qn add -inet6 fe80:: -prefixlen 10 ::1 -reject
1.66 itojun 259:
1.83 miod 260: # Disallow site-local unicast dest without outgoing scope identifiers.
1.66 itojun 261: # If you configure site-locals without scope id (it is permissible
262: # config for routers that are not on scope boundary), you may want
263: # to comment the line out.
1.202 kn 264: route -qn add -inet6 fec0:: -prefixlen 10 ::1 -reject
1.66 itojun 265:
1.83 miod 266: # Disallow "internal" addresses to appear on the wire.
1.202 kn 267: route -qn add -inet6 ::ffff:0.0.0.0 -prefixlen 96 ::1 -reject
1.66 itojun 268:
1.83 miod 269: # Disallow packets to malicious 6to4 prefix.
1.202 kn 270: route -qn add -inet6 2002:e000:: -prefixlen 20 ::1 -reject
271: route -qn add -inet6 2002:7f00:: -prefixlen 24 ::1 -reject
272: route -qn add -inet6 2002:0000:: -prefixlen 24 ::1 -reject
273: route -qn add -inet6 2002:ff00:: -prefixlen 24 ::1 -reject
1.115 itojun 274:
275: # Disallow packets without scope identifier.
1.202 kn 276: route -qn add -inet6 ff01:: -prefixlen 16 ::1 -reject
277: route -qn add -inet6 ff02:: -prefixlen 16 ::1 -reject
1.66 itojun 278:
279: # Completely disallow packets to IPv4 compatible prefix.
1.146 rpe 280: #
1.66 itojun 281: # This may conflict with RFC1933 under following circumstances:
282: # (1) An IPv6-only KAME node tries to originate packets to IPv4
1.77 deraadt 283: # compatible destination. The KAME node has no IPv4 compatible
1.66 itojun 284: # support. Under RFC1933, it should transmit native IPv6
285: # packets toward IPv4 compatible destination, hoping it would
286: # reach a router that forwards the packet toward auto-tunnel
287: # interface.
1.77 deraadt 288: # (2) An IPv6-only node originates a packet to an IPv4 compatible
1.66 itojun 289: # destination. A KAME node is acting as an IPv6 router, and
290: # asked to forward it.
1.146 rpe 291: #
1.77 deraadt 292: # Due to rare use of IPv4 compatible addresses, and security issues
1.66 itojun 293: # with it, we disable it by default.
1.202 kn 294: route -qn add -inet6 ::0.0.0.0 -prefixlen 96 ::1 -reject
1.54 itojun 295: else
296: ip6kernel=NO
297: fi
298:
1.195 rpe 299: # Create all the pseudo interfaces up front.
1.191 dlg 300: vifscreate
1.105 todd 301:
302: # Configure all the non-loopback interfaces which we know about, but
1.127 deraadt 303: # do not start interfaces which must be delayed. Refer to hostname.if(5)
1.207 jmc 304: ifmstart "" "aggr trunk svlan vlan carp pppoe tun tap gif etherip gre egre pflow wg"
1.56 itojun 305:
1.201 dlg 306: # The aggr and trunk interfaces need to come up first in this list.
1.132 mpf 307: # The (s)vlan interfaces need to come up after trunk.
1.118 brad 308: # Configure all the carp interfaces which we know about before default route.
1.201 dlg 309: ifmstart "aggr trunk svlan vlan carp pppoe"
1.102 mcbride 310:
1.195 rpe 311: # Set default routes for IPv4 and IPv6.
1.172 mpi 312: defaultroute
1.44 deraadt 313:
1.48 niklas 314: # Multicast routing.
1.168 sthen 315: if [[ $multicast != YES ]]; then
316: route -qn delete 224.0.0.0/4 >/dev/null 2>&1
1.147 rpe 317: route -qn add -net 224.0.0.0/4 -interface 127.0.0.1 -reject >/dev/null
1.168 sthen 318: fi
1.105 todd 319:
1.146 rpe 320: # Reject 127/8 other than 127.0.0.1.
1.147 rpe 321: route -qn add -net 127 127.0.0.1 -reject >/dev/null
1.191 dlg 322:
323: # Configure interfaces that rely on routing
1.207 jmc 324: ifmstart "tun tap gif etherip gre egre pflow wg"
1.116 david 325:
1.159 rpe 326: if [[ $ip6kernel == YES ]]; then
1.195 rpe 327: # Ensure IPv6 Duplicate Address Detection (DAD) is completed.
1.124 markus 328: count=0
1.159 rpe 329: while ((count++ < 10 && $(sysctl -n net.inet6.ip6.dad_pending) != 0)); do
1.124 markus 330: sleep 1
331: done
1.116 david 332: fi
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