#!/bin/sh PROGRAM=setup-interfaces PREFIX= PKGS= for i in ./libalpine.sh $PREFIX/lib/libalpine.sh; do [ -e $i ] && . $i && break done unconfigured_add() { touch $1.noconf } unconfigured_detect() { local i= for i in ${INTERFACES:-$(available_ifaces)}; do if [ "$i" != "lo" ]; then unconfigured_add $i fi done } unconfigured_get_first() { ls *.noconf 2>/dev/null | head -n 1 | sed 's/.noconf//' } unconfigured_del() { rm -f $1.noconf } unconfigured_all_done() { local i= for i in *.noconf; do [ -e $i ] && return 1 done return 0 } unconfigured_list() { local list= i= for i in *.noconf; do [ -e "$i" ] || continue list="${list} ${i%.noconf}" done echo $list } unconfigured_isin() { [ -f $1.noconf ] } iface_exists() { test -e /sys/class/net/$1 } get_default_addr() { # check if dhcpcd is running if pidof dhcpcd > /dev/null && [ -f "$ROOT/var/lib/dhcpc/dhcpcd-$1.info" ]; then echo dhcp elif iface_exists $1; then ip addr show $1 | awk '/inet / {print $2}' | head -n 1 | sed 's:/.*::' fi } get_default_mask() { if [ "$1" ] ; then ipcalc -m $1 | sed 's/.*=//' else echo "255.255.255.0" fi } get_default_gateway() { if iface_exists $1; then ip route show dev $1 | awk '/^default/ {print $3}' fi } ipaddr_help() { cat <<__EOF__ Select the ip address for this interface. dhcp Dynamic/automatic ip via DHCP none Do not add any address n.n.n.n (ex: 192.168.0.1) Static ip n.n.n.n/m (ex: 192.168.0.1/24) Static ip with mask br[0-9]+ (ex: br0) Add this interface to a bridge bridge[0-9] (ex: bridge0) Add this interface to a bridge You will be prompted for netmask if not specified with the address. __EOF__ } bridge_add_port() { local bridge=$1 iface= shift for iface; do echo $iface >> $bridge.bridge_ports unconfigured_add $bridge unconfigured_del $iface done } bridge_list_ports() { if [ -r $1.bridge_ports ]; then echo $(cat $1.bridge_ports) fi } is_bridge() { test -r $1.bridge_ports } config_iface() { local iface=$1 local prefix=$2 local default_address=$3 local address= netmask= gateway= bridge_ports= local bridge local conf=$prefix$iface.conf local answer= while [ -n "$ask_bridge" ] && ! is_bridge $iface; do ask "Do you want to bridge the interface $iface?" yes case "$resp" in yes|y) resp=yes; break;; no|n) break;; esac done if [ "$resp" = "yes" ]; then bridge="br"`echo $iface | sed 's/[^0-9]//g'` ask "Name of the bridge you want add $iface to:" $bridge bridge_add_port $resp $iface return fi if [ -r "$iface.bridge_ports" ]; then bridge_ports=$(echo $(cat $iface.bridge_ports)) echo "bridge_ports=\"$bridge_ports\"" >> $conf fi if [ -r "$iface.bond_slaves" ]; then bond_slaves=$(echo $(cat $iface.bond_slaves)) echo "bond_slaves=\"$bond_slaves\"" >> $conf fi if [ -r "$iface.raw_device" ]; then raw_device=$(cat $iface.raw_device) echo "raw_device=\"$raw_device\"" >> $conf fi # use ipcalc to validate the address. we do accept /mask # we are no interested in the result, only error code, so # we send result to /dev/null while ! ipcalc -s -m $address >/dev/null 2>&1; do address=${default_address:-$(get_default_addr $iface)} [ -z "$address" ] && address="dhcp" ask "Ip address for $iface? (or 'dhcp', 'none', '?')" $address address=$resp case "$resp" in '?') ipaddr_help;; "abort") return;; "dhcp") echo "type=dhcp" >> $conf unconfigured_del $iface return ;; "none") echo "type=manual" >> $conf unconfigured_del $iface return;; br[0-9]*|bridge[0-9]*) case "$iface" in # we dont allow bridge bridges br[0-9]*|bridge[0-9]*) continue;; esac bridge_add_port $resp $iface return ;; esac done # extract netmask if entered together with address if [ "$address" != "${address%%/*}" ]; then netmask=$(ipcalc -s -m $address | cut -d= -f2) fi # use ipcalc -m to validate netmask. we dont accept /mask suffix # so we pass on a dummy mask to ipcalc. while ! ipcalc -s -m $netmask/0 >/dev/null 2>&1; do netmask=`get_default_mask $address` ask "Netmask?" $netmask netmask=$resp [ "$netmask" = "abort" ] && return done # use ipcalc -m to validate netmask. we dont accept /mask suffix # so we pass on a dummy mask to ipcalc. while ! ipcalc -s -m $gateway/0 >/dev/null 2>&1; do gateway=`get_default_gateway $iface` [ -z "$gateway" ] && gateway=none ask "Gateway? (or 'none')" $gateway gateway=$resp [ "$gateway" = "abort" ] && return [ "$gateway" = "none" ] && gateway="" [ -z "$gateway" ] && break done echo "type=static" >> $conf if [ -n "$bridge_ports" ]; then echo "bridge_ports=$bridge_ports" >> $conf fi echo "address=${address%%/*}" >> $conf #strip off /mask if there echo "netmask=$netmask" >> $conf echo "gateway=$gateway" >> $conf # print summary echo "Configuration for $iface:" sed 's/^/ /' $conf unconfigured_del $iface } is_bridge() { [ -e /sys/class/net/$1/bridge ] || [ -e $1.bridge_ports ] } is_bond_master() { [ -e $1.bond_slaves ] } unconfigured_available() { local local i= iflist= for i in $(unconfigured_list); do if ! is_bridge $i && ! is_bond_master $i; then iflist="${iflist}${iflist:+ }$i" fi done echo $iflist } unconfigured_all_are() { local i= for i; do unconfigured_isin $i || return 1 done return 0 } config_bridge() { local bridge=$1 iflist= i= ports= while ! unconfigured_all_done; do set -- $(unconfigured_available) [ $# -eq 0 ] && return 0; ports=$(bridge_list_ports $bridge) if [ -n "$ports" ]; then echo "Bridge ports in $bridge are: $ports" fi echo "Available bridge ports are: $@" ask "Which port(s) do you want add to bridge $bridge? (or 'done')" $1 case $resp in 'abort') return 1;; 'done') return 0;; esac for i in $resp; do if unconfigured_isin $i; then bridge_add_port $bridge $i else echo "$i is not valid" fi done done } bond_add_slave() { local master=$1 slave= shift for slave; do echo $slave >> $master.bond_slaves unconfigured_add $master unconfigured_del $slave done } bond_list_slaves() { if [ -r $1.bond_slaves ]; then echo $(cat $1.bond_slaves) fi } config_bond() { local master=$1 slaves= while ! unconfigured_all_done; do set -- $(unconfigured_available) [ $# -eq 0 ] && return 0; slaves=$(bond_list_slaves $master) if [ -n "$slaves" ]; then echo "Bond slaves in $master are: $slaves" fi echo "Available bond slaves are: $@" ask "Which slave(s) do you want add to $master? (or 'done')" $1 case $resp in 'abort') return 1;; 'done') return 0;; esac for i in $resp; do if unconfigured_isin $i; then bond_add_slave $master $i else echo "$i is not valid" fi done done } config_vlan() { local iface=$1 vid= raw_device= case $iface in *.*) raw_device=${iface%.*} vid=${iface#*.} ;; vlan*) vid=${iface#vlan} ask_which "raw device" "do you want use for $iface" "$(unconfigured_list)" echo "$resp" > $iface.raw_device return 0 ;; esac if unconfigured_isin $raw_device || is_bond_master $raw_device; then return 0 fi echo "$raw_device is not a valid raw device for $iface" return 1 } usage() { cat <<__EOF__ usage: setup-interfaces [-bhi] Setup network interfaces options: -b Ask for bridging of interfaces -h Show this help -i Read new contents of ${ROOT}etc/network/interfaces from stdin __EOF__ exit 1 } iface_help() { cat <<__EOF__ Select the interface you wish to configure. For advanced configurations, you can also enter: br[0-9]+ (ex: br0) bridge interface bridge[0-9]+ (ex: bridge0) bridge interface bond[0-9]+ (ex: bond32) bonded interface vlan[0-9]+ (ex: vlan371) vlan interface eth?.[0-9]+ (ex: eth0.371) vlan interface bond?.[0.9]+ (ex: bond0.371) vlan interface You will be asked which physical interface(s) to be used for advanced configurations. __EOF__ } prompt_for_interfaces() { init_tmpdir TMP cd $TMP unconfigured_detect index=1 while ! unconfigured_all_done; do echo "Available interfaces are: $(unconfigured_list)." echo "Enter '?' for help on bridges, bonding and vlans." ask "Which one do you want to initialize? (or '?' or 'done')" \ $(unconfigured_get_first) iface=$resp case "$iface" in "done") break;; '?') iface_help; continue;; br[0-9]*|bridge[0-9]*|virbr[0-9]*) config_bridge $iface || continue;; bond[0-9]*.[0-9]*) config_bond ${iface%.*} || continue config_iface ${iface%.*} $(printf "%.3d~" $index) none index=$(( $index + 1 )) config_vlan $iface || continue ;; bond[0-9]*) config_bond $iface || continue;; *.[0-9]*|vlan[0-9]*) config_vlan $iface || continue;; *) unconfigured_isin $iface || continue;; esac config_iface $iface $(printf "%.3d~" $index) index=$(( $index + 1 )) done if [ "$(openrc --sys)" != "LXC" ] || ! ip addr show lo | grep -q 'inet.*127\.0'; then echo "type=loopback" > 000~lo.conf echo "" > interface fi hostname=$(cat $ROOT/etc/hostname 2>/dev/null) for i in *.conf ; do iface=`basename $i .conf` iface=${iface#[0-9]*~} bridge_ports= bond_slaves= raw_device= address= type= gateway= . ./$i echo "auto $iface" >> interfaces echo "iface $iface inet $type" >> interfaces if [ -n "$bridge_ports" ]; then PKGS="$PKGS bridge" echo -e "\tbridge-ports $bridge_ports" >> interfaces fi if [ -n "$bond_slaves" ]; then PKGS="$PKGS bonding" echo -e "\tbond-slaves $bond_slaves" >> interfaces fi if [ -n "$raw_device" ]; then echo -e "\tvlan-raw-device $raw_device" >> interfaces fi case "$iface" in *.[0-9]*|vlan[0-9]*) PKGS="$PKGS vlan";; esac case $type in manual) echo -e "\tup ip link set \$IFACE up" >> interfaces echo -e "\tdown ip link set \$IFACE down" >> interfaces ;; dhcp) [ -n "$hostname" ] \ && echo -e "\thostname $hostname" >> interfaces ;; static) echo -e "\taddress $address" >> interfaces echo -e "\tnetmask $netmask" >> interfaces [ "$gateway" ] \ && echo -e "\tgateway $gateway" >> interfaces ;; esac echo "" >> interfaces done while [ "$answer" != "yes" ] && [ "$answer" != "no" ] ; do ask "Do you want to do any manual network configuration?" no case $resp in y) answer=yes;; n) answer=no;; *) answer=$resp;; esac done if yesno "$answer"; then case "$EDITOR" in nano) apk add nano;; vim) apk add vim;; esac ${EDITOR:-vi} interfaces fi if [ -n "$PKGS" ]; then apk add --quiet $PKGS fi mkdir -p $ROOT/etc/network cp interfaces $ROOT/etc/network/ } ask_bridge= is_xen_dom0 && ask_bridge=1 while getopts "bhip:" opt; do case $opt in b) ask_bridge=1;; h) usage;; i) STDINPUT=1;; p) ROOT=$OPTARG;; esac done mkdir -p $ROOT/etc/network if [ "$STDINPUT" = "1" ]; then cat > $ROOT/etc/network/interfaces else prompt_for_interfaces fi