Annotation of src/etc/netstart, Revision 1.192
1.1 deraadt 1: #!/bin/sh -
2: #
1.192 ! rpe 3: # $OpenBSD: netstart,v 1.191 2018/02/14 22:08:45 dlg Exp $
1.153 rpe 4:
5: # Turn off Strict Bourne shell mode.
6: set +o sh
1.101 millert 7:
1.173 rpe 8: # Echo file $1 to stdout. Skip comment lines and delete everything
9: # after the first '#' from other lines. Strip leading and trailing
10: # whitespace if IFS is set.
1.160 rpe 11: # Usage: stripcom /path/to/file
1.101 millert 12: stripcom() {
1.160 rpe 13: local _file=$1 _line
14:
15: [[ -f $_file ]] || return
16:
17: while read _line; do
18: [[ -n ${_line%%#*} ]] && print -r -- "$_line"
19: done <$_file
1.101 millert 20: }
1.45 millert 21:
1.177 rpe 22: # Parse and "unpack" a hostname.if(5) line given as positional parameters.
23: # Fill the _cmds array with the resulting interface configuration commands.
24: parse_hn_line() {
25: local _af=0 _name=1 _mask=2 _bc=3 _prefix=2 _c _cmd _prev _daddr
26: set -A _c -- "$@"
27: set -o noglob
28:
29: case ${_c[_af]} in
30: ''|*([[:blank:]])'#'*)
31: return
32: ;;
33: inet) ((${#_c[*]} > 1)) || return
34: [[ ${_c[_name]} == alias ]] && _mask=3 _bc=4
35: [[ -n ${_c[_mask]} ]] && _c[_mask]="netmask ${_c[_mask]}"
36: if [[ -n ${_c[_bc]} ]]; then
37: _c[_bc]="broadcast ${_c[_bc]}"
38: [[ ${_c[_bc]} == *NONE ]] && _c[_bc]=
39: fi
40: _cmds[${#_cmds[*]}]="ifconfig $_if ${_c[@]}"
41: ;;
42: inet6) ((${#_c[*]} > 1)) || return
43: if [[ ${_c[_name]} == autoconf ]]; then
44: _cmds[${#_cmds[*]}]="ifconfig $_if ${_c[@]}"
1.180 rpe 45: V6_AUTOCONF=true
1.177 rpe 46: return
47: fi
48: [[ ${_c[_name]} == alias ]] && _prefix=3
49: [[ -n ${_c[_prefix]} ]] && _c[_prefix]="prefixlen ${_c[_prefix]}"
50: _cmds[${#_cmds[*]}]="ifconfig $_if ${_c[@]}"
51: ;;
52: dest) ((${#_c[*]} == 2)) && _daddr=${_c[1]} || return
53: _prev=$((${#_cmds[*]} - 1))
54: ((_prev >= 0)) || return
55: set -A _c -- ${_cmds[_prev]}
56: _name=3
57: [[ ${_c[_name]} == alias ]] && _name=4
58: _c[_name]="${_c[_name]} $_daddr"
59: _cmds[$_prev]="${_c[@]}"
60: ;;
61: dhcp) _c[0]=
62: _cmds[${#_cmds[*]}]="ifconfig $_if ${_c[@]} down;dhclient $_if"
1.180 rpe 63: V4_DHCPCONF=true
1.177 rpe 64: ;;
65: '!'*) _cmd=$(print -- "${_c[@]}" | sed 's/\$if/'$_if'/g')
66: _cmds[${#_cmds[*]}]="${_cmd#!}"
67: ;;
68: *) _cmds[${#_cmds[*]}]="ifconfig $_if ${_c[@]}"
69: ;;
70: esac
71: unset _c
1.178 rpe 72: set +o noglob
1.177 rpe 73: }
74:
1.192 ! rpe 75: # Create interface $1 if it does not yet exist.
1.191 dlg 76: ifcreate() {
77: local _if=$1
78:
1.192 ! rpe 79: { ifconfig $_if || ifconfig $_if create; } >/dev/null 2>&1
1.191 dlg 80: }
81:
1.192 ! rpe 82: # Create interfaces for network pseudo-devices referred to by hostname.if files.
1.191 dlg 83: vifscreate() {
1.192 ! rpe 84: local _vif _hn _if
1.191 dlg 85:
1.192 ! rpe 86: for _vif in $(ifconfig -C); do
1.191 dlg 87: for _hn in /etc/hostname.${_vif}*; do
88: [[ -f $_hn ]] || continue
89: _if=${_hn#/etc/hostname.}
90:
91: ifcreate $_if || return
92: done
93: done
94: }
95:
1.160 rpe 96: # Start a single interface.
97: # Usage: ifstart if1
1.83 miod 98: ifstart() {
1.187 tb 99: local _if=$1 _hn=/etc/hostname.$1 _cmds _i=0 _line _stat
1.177 rpe 100: set -A _cmds
1.174 rpe 101:
1.83 miod 102: # Interface names must be alphanumeric only. We check to avoid
103: # configuring backup or temp files, and to catch the "*" case.
1.177 rpe 104: [[ $_if != +([[:alpha:]])+([[:digit:]]) ]] && return
1.83 miod 105:
1.185 rpe 106: if [[ ! -f $_hn ]]; then
107: echo "${0##*/}: $_hn: No such file or directory"
1.121 todd 108: return
109: fi
1.177 rpe 110:
1.146 rpe 111: # Not using stat(1), we can't rely on having /usr yet.
1.185 rpe 112: set -A _stat -- $(ls -nL $_hn)
1.183 rpe 113: if [[ "${_stat[0]}${_stat[2]}${_stat[3]}" != *---00 ]]; then
1.185 rpe 114: echo "WARNING: $_hn is insecure, fixing permissions"
115: chmod -LR o-rwx $_hn
116: chown -LR root:wheel $_hn
1.119 deraadt 117: fi
1.83 miod 118:
1.177 rpe 119: # Check for ifconfig'able interface, except if -n option is specified.
120: if ! $PRINT_ONLY; then
1.191 dlg 121: ifcreate $_if || return
1.177 rpe 122: fi
123:
124: # Parse the hostname.if(5) file and fill _cmds array with interface
125: # configuration commands.
126: set -o noglob
127: while IFS= read -- _line; do
128: parse_hn_line $_line
1.185 rpe 129: done <$_hn
1.177 rpe 130:
131: # Apply the interface configuration commands stored in _cmds array.
132: while ((_i < ${#_cmds[*]})); do
133: if $PRINT_ONLY; then
134: print -r -- "${_cmds[_i]}"
1.83 miod 135: else
1.177 rpe 136: eval "${_cmds[_i]}"
1.83 miod 137: fi
1.177 rpe 138: ((_i++))
139: done
140: unset _cmds
1.178 rpe 141: set +o noglob
1.83 miod 142: }
143:
1.161 rpe 144: # Start multiple interfaces by driver name.
145: # Usage: ifmstart "em iwm" "trunk vlan"
1.146 rpe 146: # Start "$1" interfaces in order or all interfaces if empty.
1.161 rpe 147: # Don't start "$2" interfaces. "$2" is optional.
1.105 todd 148: ifmstart() {
1.161 rpe 149: local _sifs=$1 _xifs=$2 _hn _if _sif _xif
150:
151: for _sif in ${_sifs:-ALL}; do
152: for _hn in /etc/hostname.*; do
153: _if=${_hn#/etc/hostname.}
154: [[ $_if == '*' ]] && continue
1.113 david 155:
1.146 rpe 156: # Skip unwanted ifs.
1.161 rpe 157: for _xif in $_xifs; do
158: [[ $_xif == ${_if%%[0-9]*} ]] && continue 2
1.105 todd 159: done
160:
1.146 rpe 161: # Start wanted ifs.
1.161 rpe 162: [[ $_sif == @(ALL|${_if%%[0-9]*}) ]] && ifstart $_if
1.105 todd 163: done
164: done
165: }
166:
1.172 mpi 167: # Parse /etc/mygate and add default routes for IPv4 and IPv6
168: # Usage: defaultroute
169: defaultroute() {
1.188 tb 170: local _cmd;
171:
1.180 rpe 172: ! $V4_DHCPCONF && stripcom /etc/mygate |
173: while read gw; do
174: [[ $gw == @(*:*) ]] && continue
1.188 tb 175: _cmd="route -qn add -host default $gw"
176: if $PRINT_ONLY; then
177: print -r -- "$_cmd" && break
178: else
179: $_cmd && break
180: fi
1.172 mpi 181: done
1.180 rpe 182: ! $V6_AUTOCONF && stripcom /etc/mygate |
183: while read gw; do
184: [[ $gw == !(*:*) ]] && continue
1.188 tb 185: _cmd="route -qn add -host -inet6 default $gw"
186: if $PRINT_ONLY; then
187: print -r -- "$_cmd" && break
188: else
189: $_cmd && break
190: fi
1.172 mpi 191: done
192: }
1.154 sthen 193:
1.151 rpe 194: # Get network related vars from rc.conf using the parsing routine from rc.subr.
195: FUNCS_ONLY=1 . /etc/rc.d/rc.subr
1.150 ajacouto 196: _rc_parse_conf
1.177 rpe 197:
198: PRINT_ONLY=false
199: USAGE="USAGE: ${0##*/} [-n] [interface ...]"
1.180 rpe 200: V4_DHCPCONF=false
201: V6_AUTOCONF=false
202:
1.177 rpe 203: while getopts ":n" opt; do
204: case $opt in
205: n) PRINT_ONLY=true;;
206: *) print -u2 "$USAGE"; exit 1;;
207: esac
208: done
209: shift $((OPTIND-1))
210:
211: # Option -n is only supported if interface names are specified as parameters.
212: if $PRINT_ONLY && (($# == 0)); then
213: print -u2 "Missing parameters.\n$USAGE"
214: exit 1
215: fi
1.189 florian 216:
217: $PRINT_ONLY || [[ ! -f /etc/soii.key ]] ||
218: sysctl -q "net.inet6.ip6.soiikey=$(</etc/soii.key)"
1.1 deraadt 219:
1.83 miod 220: # If we were invoked with a list of interface names, just reconfigure these
1.172 mpi 221: # interfaces (or bridges), add default routes and return.
1.159 rpe 222: if (($# > 0)); then
223: for _if; do ifstart $_if; done
1.172 mpi 224: defaultroute
1.83 miod 225: return
226: fi
227:
228: # Otherwise, process with the complete network initialization.
229:
1.146 rpe 230: # /etc/myname contains my symbolic name.
1.159 rpe 231: [[ -f /etc/myname ]] && hostname "$(stripcom /etc/myname)"
1.4 dm 232:
1.131 sobrado 233: # Set the address for the loopback interface. Bringing the interface up,
234: # automatically invokes the IPv6 address ::1.
1.129 henning 235: ifconfig lo0 inet 127.0.0.1/8
1.24 kstailey 236:
1.54 itojun 237: if ifconfig lo0 inet6 >/dev/null 2>&1; then
238: # IPv6 configurations.
239: ip6kernel=YES
240:
1.83 miod 241: # Disallow link-local unicast dest without outgoing scope identifiers.
1.147 rpe 242: route -qn add -inet6 fe80:: -prefixlen 10 ::1 -reject >/dev/null
1.66 itojun 243:
1.83 miod 244: # Disallow site-local unicast dest without outgoing scope identifiers.
1.66 itojun 245: # If you configure site-locals without scope id (it is permissible
246: # config for routers that are not on scope boundary), you may want
247: # to comment the line out.
1.147 rpe 248: route -qn add -inet6 fec0:: -prefixlen 10 ::1 -reject >/dev/null
1.66 itojun 249:
1.83 miod 250: # Disallow "internal" addresses to appear on the wire.
1.147 rpe 251: route -qn add -inet6 ::ffff:0.0.0.0 -prefixlen 96 ::1 -reject >/dev/null
1.66 itojun 252:
1.83 miod 253: # Disallow packets to malicious 6to4 prefix.
1.147 rpe 254: route -qn add -inet6 2002:e000:: -prefixlen 20 ::1 -reject >/dev/null
255: route -qn add -inet6 2002:7f00:: -prefixlen 24 ::1 -reject >/dev/null
256: route -qn add -inet6 2002:0000:: -prefixlen 24 ::1 -reject >/dev/null
257: route -qn add -inet6 2002:ff00:: -prefixlen 24 ::1 -reject >/dev/null
1.115 itojun 258:
259: # Disallow packets without scope identifier.
1.147 rpe 260: route -qn add -inet6 ff01:: -prefixlen 16 ::1 -reject >/dev/null
261: route -qn add -inet6 ff02:: -prefixlen 16 ::1 -reject >/dev/null
1.66 itojun 262:
263: # Completely disallow packets to IPv4 compatible prefix.
1.146 rpe 264: #
1.66 itojun 265: # This may conflict with RFC1933 under following circumstances:
266: # (1) An IPv6-only KAME node tries to originate packets to IPv4
1.77 deraadt 267: # compatible destination. The KAME node has no IPv4 compatible
1.66 itojun 268: # support. Under RFC1933, it should transmit native IPv6
269: # packets toward IPv4 compatible destination, hoping it would
270: # reach a router that forwards the packet toward auto-tunnel
271: # interface.
1.77 deraadt 272: # (2) An IPv6-only node originates a packet to an IPv4 compatible
1.66 itojun 273: # destination. A KAME node is acting as an IPv6 router, and
274: # asked to forward it.
1.146 rpe 275: #
1.77 deraadt 276: # Due to rare use of IPv4 compatible addresses, and security issues
1.66 itojun 277: # with it, we disable it by default.
1.147 rpe 278: route -qn add -inet6 ::0.0.0.0 -prefixlen 96 ::1 -reject >/dev/null
1.54 itojun 279: else
280: ip6kernel=NO
281: fi
282:
1.191 dlg 283: # Create all the pseudo interfaces up front
284: vifscreate
1.105 todd 285:
286: # Configure all the non-loopback interfaces which we know about, but
1.127 deraadt 287: # do not start interfaces which must be delayed. Refer to hostname.if(5)
1.191 dlg 288: ifmstart "" "trunk svlan vlan carp pppoe tun tap gif etherip gre egre mobileip pflow"
1.56 itojun 289:
1.118 brad 290: # The trunk interfaces need to come up first in this list.
1.132 mpf 291: # The (s)vlan interfaces need to come up after trunk.
1.118 brad 292: # Configure all the carp interfaces which we know about before default route.
1.191 dlg 293: ifmstart "trunk svlan vlan carp pppoe"
1.102 mcbride 294:
1.138 todd 295: # Look for default routes in /etc/mygate.
1.172 mpi 296: defaultroute
1.44 deraadt 297:
1.48 niklas 298: # Multicast routing.
1.168 sthen 299: if [[ $multicast != YES ]]; then
300: route -qn delete 224.0.0.0/4 >/dev/null 2>&1
1.147 rpe 301: route -qn add -net 224.0.0.0/4 -interface 127.0.0.1 -reject >/dev/null
1.168 sthen 302: fi
1.105 todd 303:
1.146 rpe 304: # Reject 127/8 other than 127.0.0.1.
1.147 rpe 305: route -qn add -net 127 127.0.0.1 -reject >/dev/null
1.191 dlg 306:
307: # Configure interfaces that rely on routing
308: ifmstart "tun tap gif etherip gre egre mobileip pflow"
1.116 david 309:
1.159 rpe 310: if [[ $ip6kernel == YES ]]; then
1.146 rpe 311: # This is to make sure DAD is completed before going further.
1.124 markus 312: count=0
1.159 rpe 313: while ((count++ < 10 && $(sysctl -n net.inet6.ip6.dad_pending) != 0)); do
1.124 markus 314: sleep 1
315: done
1.116 david 316: fi
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