[package] base-files: replace udhcpc script with an improved version

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@15635 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/package/base-files/files/usr/share/udhcpc/default.script b/package/base-files/files/usr/share/udhcpc/default.script
index 84c7297..7dfb0f9 100755 (executable)
--- a/package/base-files/files/usr/share/udhcpc/default.script
+++ b/package/base-files/files/usr/share/udhcpc/default.script
@@ -1,85 +1,127 @@
 #!/bin/sh
 [ -z "$1" ] && echo "Error: should be run by udhcpc" && exit 1
+
 . /etc/functions.sh
 include /lib/network
-
 RESOLV_CONF="/tmp/resolv.conf.auto"
 
-hotplug_event() {
-       scan_interfaces
-       for ifc in $interfaces; do
-               config_get ifname $ifc ifname
-               [ "$ifname" = "$interface" ] || continue
-
-               config_get proto $ifc proto
-               [ "$proto" = "dhcp" ] || continue
-               [ ifup = "$1" ] && {
-                       config_get userdns "$ifc" dns
-                       [ -n "$userdns" ] && {
-                               for i in $userdns; do
-                                       echo "custom dns $i"
-                                       echo "nameserver $i" >> "${RESOLV_CONF}.tmp"
-                               done
-                               dns="$userdns"
-                       }
-                       uci_set_state network "$ifc" ipaddr "$ip"
-                       uci_set_state network "$ifc" netmask "${subnet:-255.255.255.0}"
-                       uci_set_state network "$ifc" dnsdomain "$domain"
-                       uci_set_state network "$ifc" dns "$dns"
-                       uci_set_state network "$ifc" gateway "$router"
-               }
-               
-               env -i ACTION="$1" INTERFACE="$ifc" DEVICE="$ifname" PROTO=dhcp /sbin/hotplug-call iface
-       done
+change_state () {
+       uci_revert_state "$1" "$2" "$3" "$4"
+       uci_set_state "$1" "$2" "$3" "$4"
 }
 
-case "$1" in
-       deconfig)
-               ifconfig $interface 0.0.0.0
-               hotplug_event ifdown
-       ;;
-       renew|bound)
-               ifconfig $interface $ip \
-               netmask ${subnet:-255.255.255.0} \
-               broadcast ${broadcast:-+}
-
-               [ -n "$router" ] && {
-                       for i in $router ; do
-                               echo "adding router $i"
-                               route add default gw $i dev $interface
-                               valid="$valid|$i"
-
-                       done
-
-                       echo "deleting old routes"
-                       $(route -n | awk '/^0.0.0.0\W{9}('$valid')\W/ {next} /^0.0.0.0/ {print "route del -net "$1" gw "$2";"}')
-               }
-
-               [ -n "$dns" ] && \
-                       echo -n > "${RESOLV_CONF}.tmp"
+uci_get() {
+       uci -P /dev/null get "$1" 2>/dev/null
+}
+
+setup_interface () {
+       local old_ip
+       local old_broadcast
+       local old_subnet
+       local old_router
+       local old_dns
+       local user_dns
+       local user_router
+
+       config_get old_ip        "$ifc" ipaddr
+       config_get old_broadcast "$ifc" broadcast
+       config_get old_subnet    "$ifc" netmask
+
+       [ "$ip" != "$old_ip" ] \
+       || [ "${broadcast:-+}" != "$old_broadcast" ] \
+       || [ "${subnet:-255.255.255.0}" != "$old_subnet" ] && {
+               echo "udhcpc: ifconfig $interface $ip netmask ${subnet:-255.255.255.0} broadcast ${broadcast:-+}"
+               ifconfig $interface $ip netmask ${subnet:-255.255.255.0} broadcast ${broadcast:-+}
+
+               change_state network "$ifc" ipaddr "$ip"
+               change_state network "$ifc" broadcast "${broadcast:-+}"
+               change_state network "$ifc" netmask "${subnet:-255.255.255.0}"
+       }
+
+
+       # Default Route
+       change_state network "$ifc" lease_gateway "$router"
+       config_get old_router "$ifc" gateway
+       user_router=$(uci_get "network.$ifc.gateway")
+       [ -n "$user_router" ] && router="$user_router"
+
+       [ -n "$router" ] && [ "$router" != "0.0.0.0" ] && [ "$router" != "$old_router" ] && {
+               echo "udhcpc: setting default routers: $router"
+
+               local valid_gw=""
+               for i in $router ; do
+                       route add default gw $i dev $interface
+                       valid_gw="${valid_gw:+$valid_gw|}$i"
+               done
                
-               [ -n "$dns" ] && {
-                       [ -s "${RESOLV_CONF}.tmp" ] || {
-                               for i in $dns ; do
-                                       echo "adding dns $i"
-                                       echo "nameserver $i" >> "${RESOLV_CONF}.tmp"
-                               done
-                       }
-
-                       ${domain:+echo search $domain} >> "${RESOLV_CONF}.tmp"
-
-                       mv "${RESOLV_CONF}.tmp" "$RESOLV_CONF"
-               }
-
-               if [ "$1" = "renew" ]; then
-                       hotplug_event update
-               else
-                       hotplug_event ifup
-               fi
-
-               # user rules
-               [ -f /etc/udhcpc.user ] && . /etc/udhcpc.user
-       ;;
-esac
+               eval $(route -n | awk '
+                       /^0.0.0.0\W{9}('$valid_gw')\W/ {next}
+                       /^0.0.0.0/ {print "route del -net "$1" gw "$2";"}
+               ')
+
+               change_state network "$ifc" gateway "$router"
+       }
+
+
+       # DNS
+       config_get old_dns "$ifc" dns
+       user_dns=$(uci_get "network.$ifc.dns")
+       [ -n "$user_dns" ] && dns="$user_dns"
+
+       [ -n "$dns" ] && [ "$dns" != "$old_dns" ] && {
+               echo "udhcpc: setting dns servers: $dns"
+               echo -n > "${RESOLV_CONF}.tmp"
+               for i in $dns ; do
+                       echo "nameserver $i" >> "${RESOLV_CONF}.tmp"
+               done
+               ${domain:+echo search $domain} >> "${RESOLV_CONF}.tmp"
+               mv "${RESOLV_CONF}.tmp" "$RESOLV_CONF"
+
+               change_state network "$ifc" dnsdomain "$domain"
+               change_state network "$ifc" dns "$dns"
+       }
+
+
+       # UCI State
+       change_state network "$ifc" lease_server "$serverid"
+       change_state network "$ifc" lease_acquired "$(date '+%s')"
+       change_state network "$ifc" lease_lifetime "$lease"
+       [ -n "$ntpsrv" ] &&     change_state network "$ifc" lease_ntpsrv "$ntpsrv"
+       [ -n "$timesvr" ] &&    change_state network "$ifc" lease_timesrv "$timesvr"
+       [ -n "$hostname" ] &&   change_state network "$ifc" lease_hostname "$hostname"
+       [ -n "$timezone" ] &&   change_state network "$ifc" lease_timezone "$timezone"
+
+
+       # Hotplug
+       env -i ACTION="$1" INTERFACE="$ifc" DEVICE="$ifname" PROTO=dhcp /sbin/hotplug-call iface
+}
+
+
+scan_interfaces
+
+for ifc in $interfaces; do
+       config_get ifname "$ifc" ifname
+       [ "$ifname" = "$interface" ] || continue
+
+       config_get proto "$ifc" proto
+       [ "$proto" = "dhcp" ] || continue
+
+       case "$1" in
+               deconfig)
+                       ifconfig "$interface" 0.0.0.0
+                       env -i ACTION="ifdown" INTERFACE="$ifc" DEVICE="$ifname" PROTO=dhcp /sbin/hotplug-call iface
+                       uci_revert_state network "$ifc"
+               ;;
+               renew)
+                       setup_interface update
+               ;;
+               bound)
+                       setup_interface ifup
+               ;;
+       esac
+
+       # user rules
+       [ -f /etc/udhcpc.user ] && . /etc/udhcpc.user
+done
 
 exit 0