base-files: replace udhcpc script with an improved version
SVN-Revision: 15635
This commit is contained in:
Jo-Philipp Wich
parent
4cdb76c219
commit
ca609a2431
1 changed files with 108 additions and 66 deletions
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@ -1,85 +1,127 @@
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#!/bin/sh
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[ -z "$1" ] && echo "Error: should be run by udhcpc" && exit 1
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. /etc/functions.sh
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include /lib/network
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RESOLV_CONF="/tmp/resolv.conf.auto"
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hotplug_event() {
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scan_interfaces
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for ifc in $interfaces; do
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config_get ifname $ifc ifname
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[ "$ifname" = "$interface" ] || continue
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config_get proto $ifc proto
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[ "$proto" = "dhcp" ] || continue
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[ ifup = "$1" ] && {
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config_get userdns "$ifc" dns
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[ -n "$userdns" ] && {
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for i in $userdns; do
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echo "custom dns $i"
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echo "nameserver $i" >> "${RESOLV_CONF}.tmp"
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done
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dns="$userdns"
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}
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uci_set_state network "$ifc" ipaddr "$ip"
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uci_set_state network "$ifc" netmask "${subnet:-255.255.255.0}"
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uci_set_state network "$ifc" dnsdomain "$domain"
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uci_set_state network "$ifc" dns "$dns"
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uci_set_state network "$ifc" gateway "$router"
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}
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env -i ACTION="$1" INTERFACE="$ifc" DEVICE="$ifname" PROTO=dhcp /sbin/hotplug-call iface
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done
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change_state () {
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uci_revert_state "$1" "$2" "$3" "$4"
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uci_set_state "$1" "$2" "$3" "$4"
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}
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case "$1" in
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deconfig)
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ifconfig $interface 0.0.0.0
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hotplug_event ifdown
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;;
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renew|bound)
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ifconfig $interface $ip \
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netmask ${subnet:-255.255.255.0} \
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broadcast ${broadcast:-+}
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uci_get() {
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uci -P /dev/null get "$1" 2>/dev/null
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}
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[ -n "$router" ] && {
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for i in $router ; do
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echo "adding router $i"
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route add default gw $i dev $interface
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valid="$valid|$i"
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setup_interface () {
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local old_ip
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local old_broadcast
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local old_subnet
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local old_router
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local old_dns
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local user_dns
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local user_router
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done
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config_get old_ip "$ifc" ipaddr
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config_get old_broadcast "$ifc" broadcast
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config_get old_subnet "$ifc" netmask
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echo "deleting old routes"
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$(route -n | awk '/^0.0.0.0\W{9}('$valid')\W/ {next} /^0.0.0.0/ {print "route del -net "$1" gw "$2";"}')
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}
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[ "$ip" != "$old_ip" ] \
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|| [ "${broadcast:-+}" != "$old_broadcast" ] \
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|| [ "${subnet:-255.255.255.0}" != "$old_subnet" ] && {
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echo "udhcpc: ifconfig $interface $ip netmask ${subnet:-255.255.255.0} broadcast ${broadcast:-+}"
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ifconfig $interface $ip netmask ${subnet:-255.255.255.0} broadcast ${broadcast:-+}
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[ -n "$dns" ] && \
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echo -n > "${RESOLV_CONF}.tmp"
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change_state network "$ifc" ipaddr "$ip"
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change_state network "$ifc" broadcast "${broadcast:-+}"
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change_state network "$ifc" netmask "${subnet:-255.255.255.0}"
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}
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# Default Route
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change_state network "$ifc" lease_gateway "$router"
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config_get old_router "$ifc" gateway
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user_router=$(uci_get "network.$ifc.gateway")
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[ -n "$user_router" ] && router="$user_router"
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[ -n "$router" ] && [ "$router" != "0.0.0.0" ] && [ "$router" != "$old_router" ] && {
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echo "udhcpc: setting default routers: $router"
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local valid_gw=""
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for i in $router ; do
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route add default gw $i dev $interface
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valid_gw="${valid_gw:+$valid_gw|}$i"
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done
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[ -n "$dns" ] && {
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[ -s "${RESOLV_CONF}.tmp" ] || {
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for i in $dns ; do
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echo "adding dns $i"
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echo "nameserver $i" >> "${RESOLV_CONF}.tmp"
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done
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}
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eval $(route -n | awk '
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/^0.0.0.0\W{9}('$valid_gw')\W/ {next}
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/^0.0.0.0/ {print "route del -net "$1" gw "$2";"}
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')
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${domain:+echo search $domain} >> "${RESOLV_CONF}.tmp"
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change_state network "$ifc" gateway "$router"
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}
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mv "${RESOLV_CONF}.tmp" "$RESOLV_CONF"
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}
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if [ "$1" = "renew" ]; then
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hotplug_event update
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else
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hotplug_event ifup
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fi
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# DNS
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config_get old_dns "$ifc" dns
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user_dns=$(uci_get "network.$ifc.dns")
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[ -n "$user_dns" ] && dns="$user_dns"
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# user rules
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[ -f /etc/udhcpc.user ] && . /etc/udhcpc.user
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;;
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esac
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[ -n "$dns" ] && [ "$dns" != "$old_dns" ] && {
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echo "udhcpc: setting dns servers: $dns"
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echo -n > "${RESOLV_CONF}.tmp"
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for i in $dns ; do
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echo "nameserver $i" >> "${RESOLV_CONF}.tmp"
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done
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${domain:+echo search $domain} >> "${RESOLV_CONF}.tmp"
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mv "${RESOLV_CONF}.tmp" "$RESOLV_CONF"
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change_state network "$ifc" dnsdomain "$domain"
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change_state network "$ifc" dns "$dns"
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}
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# UCI State
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change_state network "$ifc" lease_server "$serverid"
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change_state network "$ifc" lease_acquired "$(date '+%s')"
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change_state network "$ifc" lease_lifetime "$lease"
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[ -n "$ntpsrv" ] && change_state network "$ifc" lease_ntpsrv "$ntpsrv"
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[ -n "$timesvr" ] && change_state network "$ifc" lease_timesrv "$timesvr"
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[ -n "$hostname" ] && change_state network "$ifc" lease_hostname "$hostname"
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[ -n "$timezone" ] && change_state network "$ifc" lease_timezone "$timezone"
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# Hotplug
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env -i ACTION="$1" INTERFACE="$ifc" DEVICE="$ifname" PROTO=dhcp /sbin/hotplug-call iface
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}
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scan_interfaces
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for ifc in $interfaces; do
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config_get ifname "$ifc" ifname
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[ "$ifname" = "$interface" ] || continue
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config_get proto "$ifc" proto
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[ "$proto" = "dhcp" ] || continue
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case "$1" in
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deconfig)
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ifconfig "$interface" 0.0.0.0
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env -i ACTION="ifdown" INTERFACE="$ifc" DEVICE="$ifname" PROTO=dhcp /sbin/hotplug-call iface
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uci_revert_state network "$ifc"
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;;
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renew)
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setup_interface update
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;;
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bound)
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setup_interface ifup
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;;
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esac
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# user rules
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[ -f /etc/udhcpc.user ] && . /etc/udhcpc.user
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done
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exit 0
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