package/base-files/files/usr/share/udhcpc/default.script

   1 #!/bin/sh
   2 [ -z "$1" ] && echo "Error: should be run by udhcpc" && exit 1
   3
   4 . /etc/functions.sh
   5 include /lib/network
   6 RESOLV_CONF="/tmp/resolv.conf.auto"
   7
   8 change_state () {
   9         [ -n "$ifc" ] || return
  10         uci_revert_state "$1" "$2" "$3" "$4"
  11         uci_set_state "$1" "$2" "$3" "$4"
  12 }
  13
  14 setup_interface () {
  15         local old_ip
  16         local old_broadcast
  17         local old_subnet
  18         local old_router
  19         local old_dns
  20         local user_dns
  21         local user_router
  22
  23         [ -n "$ifc" ] && {
  24                 old_ip="$(uci_get_state network "$ifc" ipaddr)"
  25                 old_broadcast="$(uci_get_state network "$ifc" broadcast)"
  26                 old_subnet="$(uci_get_state network "$ifc" netmask)"
  27         }
  28
  29         [ "$ip" != "$old_ip" ] \
  30         || [ "${broadcast:-+}" != "$old_broadcast" ] \
  31         || [ "${subnet:-255.255.255.0}" != "$old_subnet" ] && {
  32                 echo "udhcpc: ifconfig $interface $ip netmask ${subnet:-255.255.255.0} broadcast ${broadcast:-+}"
  33                 ifconfig $interface $ip netmask ${subnet:-255.255.255.0} broadcast ${broadcast:-+}
  34
  35                 change_state network "$ifc" ipaddr "$ip"
  36                 change_state network "$ifc" broadcast "${broadcast:-+}"
  37                 change_state network "$ifc" netmask "${subnet:-255.255.255.0}"
  38         }
  39
  40
  41         # Default Route
  42         [ -n "$ifc" ] && {
  43                 change_state network "$ifc" lease_gateway "$router"
  44                 old_router="$(uci_get_state network "$ifc" gateway)"
  45                 user_router="$(uci_get network "$ifc" gateway)"
  46                 [ -n "$user_router" ] && router="$user_router"
  47         }
  48
  49         [ -n "$router" ] && [ "$router" != "0.0.0.0" ] && [ "$router" != "255.255.255.255" ] && [ "$router" != "$old_router" ] && {
  50                 echo "udhcpc: setting default routers: $router"
  51
  52                 local valid_gw=""
  53                 for i in $router ; do
  54                         route add default gw $i dev $interface
  55                         valid_gw="${valid_gw:+$valid_gw|}$i"
  56                 done
  57
  58                 eval $(route -n | awk '
  59                         /^0.0.0.0\W{9}('$valid_gw')\W/ {next}
  60                         /^0.0.0.0/ {print "route del -net "$1" gw "$2";"}
  61                 ')
  62
  63                 change_state network "$ifc" gateway "$router"
  64         }
  65
  66         # CIDR STATIC ROUTES (rfc3442)
  67         [ -n "$cidrroute" ] && {
  68                 # This defines how many CIDR Routes can be assigned so that we do not enter
  69                 # an endless loop on malformed data
  70                 MAXCIDRROUTES=24;
  71                 while [ ${MAXCIDRROUTES} -gt "0" ]; do
  72                         # Format is
  73                         # $MASK $NW $GW
  74                         # $NW == AAA.BBB.CCC.DDD
  75                         # $GW == EEE.FFF.CCC.DDD
  76                         # $MASK AAA.[BBB].[CCC].[DDD] EEE.FFF.GGG.HHH
  77                         #   1    2    3     4     5    6   7   8   9
  78                         MASK=$(echo $cidrroute | awk '{ print $1 }')
  79                         if [ ${MASK} = "0" ] ; then
  80                                 # $MASK EEE.FFF.GGG.HHH
  81                                 #   1    2   3   5   6
  82                                 NW="0"
  83                                 GW=$(echo $cidrroute | awk '{ print $2"."$3"."$4"."$5 }' )
  84                         elif [ ${MASK} -le "8" ] ; then
  85                                 # $MASK AAA EEE.FFF.GGG.HHH
  86                                 #   1    2   3   5   6   7
  87                                 NW=$(echo $cidrroute | awk '{ print $2 }' )
  88                                 GW=$(echo $cidrroute | awk '{ print $3"."$4"."$5"."$6 }' )
  89                         elif [ ${MASK} -le "16" ] ; then
  90                                 # $MASK AAA.BBB EEE.FFF.GGG.HHH
  91                                 #   1    2   3   5   6   7   8
  92                                 NW=$(echo $cidrroute | awk '{ print $2"."$3 }' )
  93                                 GW=$(echo $cidrroute | awk '{ print $4"."$5"."$6"."$7 }' )
  94                         elif [ ${MASK} -le "24" ] ; then
  95                                 # $MASK AAA.BBB.CCC EEE.FFF.GGG.HHH
  96                                 #   1    2   3   4   5   6   7   8
  97                                 NW=$(echo $cidrroute | awk '{ print $2"."$3"."$4 }' )
  98                                 GW=$(echo $cidrroute | awk '{ print $5"."$6"."$7"."$8 }' )
  99
 100                         else
 101                                 # $MASK AAA.BBB.CCC.DDD EEE.FFF.GGG.HHH
 102                                 #   1    2   3   4   5   6   7   8   9
 103                                 NW=$(echo $cidrroute | awk '{ print $2"."$3"."$4"."$5 }' )
 104                                 GW=$(echo $cidrroute | awk '{ print $6"."$7"."$8"."$9 }' )
 105                         fi
 106                         echo [$ROUTECOUNTER] Route Network: $NW/$MASK Gateway: $GW on $interface
 107
 108                         # TODO: Check for malformed data here to eliminate counter workaround
 109                         # Malformed data is: ... or xxx... or xxx.yyy.. or xxx.yyy.zzz.
 110
 111                         [ -n "$NW" ] && [ -n "$GW" ] && {
 112                                 route add $NW gw $GW dev $interface
 113                         }
 114
 115                         # Clear the strings incase they don't get set next time around
 116                         if [ ${NW} = "0" ]; then
 117                                 NW=""
 118                         fi
 119                         TMP="$MASK $NW $GW "
 120                         NW=""
 121                         GW=""
 122
 123                         # Remove the '.' so that we can delete them from the input with sed
 124                         TMP=$(echo $TMP | sed "s/\./ /g")
 125
 126                         # Remove the previous entry from cidrroute
 127                         cidrroute=$(echo $cidrroute | sed "s/$TMP//g")
 128
 129                         # Add to counter
 130                         let ROUTECOUNTER=$ROUTECOUNTER+1;
 131                         let MAXCIDRROUTES=$MAXCIDRROUTES-1;
 132
 133                         # Leave the loop if cidrroutes is empty (we've parsed everything)
 134                         [ ! -n "$cidrroute" ] && break
 135
 136                 done
 137
 138                 echo "done."
 139         }
 140
 141         # DNS
 142         old_dns=$(uci_get_state network "$ifc" dns)
 143         old_domain=$(uci_get_state network "$ifc" dnsdomain)
 144         user_dns=$(uci_get "network.$ifc.dns")
 145         [ -n "$user_dns" ] && dns="$user_dns"
 146
 147         [ -n "$dns" ] && [ "$dns" != "$old_dns" -o -n "$user_dns" ] && {
 148                 echo "udhcpc: setting dns servers: $dns"
 149                 add_dns "$ifc" $dns
 150
 151                 [ -n "$domain" ] && [ "$domain" != "$old_domain" ] && {
 152                         echo "udhcpc: setting dns domain: $domain"
 153                         sed -i -e "${old_domain:+/^search $old_domain$/d; }/^search $domain$/d" "${RESOLV_CONF}"
 154                         echo "search $domain" >> "${RESOLV_CONF}"
 155                         change_state network "$ifc" dnsdomain "$domain"
 156                 }
 157         }
 158
 159         [ -n "$ifc" ] || return
 160
 161         # UCI State
 162         change_state network "$ifc" lease_server "$serverid"
 163         change_state network "$ifc" lease_acquired "$(date '+%s')"
 164         change_state network "$ifc" lease_lifetime "$lease"
 165         [ -n "$ntpsrv" ] &&     change_state network "$ifc" lease_ntpsrv "$ntpsrv"
 166         [ -n "$timesvr" ] &&    change_state network "$ifc" lease_timesrv "$timesvr"
 167         [ -n "$hostname" ] &&   change_state network "$ifc" lease_hostname "$hostname"
 168         [ -n "$timezone" ] &&   change_state network "$ifc" lease_timezone "$timezone"
 169
 170
 171         # Hotplug
 172         env -i ACTION="$1" INTERFACE="$ifc" DEVICE="$ifname" PROTO=dhcp /sbin/hotplug-call iface
 173 }
 174
 175
 176 scan_interfaces
 177 applied=
 178 for ifc in $interfaces __default; do
 179         if [ "$ifc" = __default ]; then
 180                 ifc=""
 181                 [ -n "$applied" ] && continue
 182         else
 183                 config_get ifname "$ifc" ifname
 184                 [ "$ifname" = "$interface" ] || continue
 185
 186                 config_get proto "$ifc" proto
 187                 [ "$proto" = "dhcp" ] || continue
 188                 applied=true
 189         fi
 190
 191         case "$1" in
 192                 deconfig)
 193                         ifconfig "$interface" 0.0.0.0
 194                         [ -n "$ifc" ] && {
 195                                 env -i ACTION="ifdown" INTERFACE="$ifc" DEVICE="$ifname" PROTO=dhcp /sbin/hotplug-call iface
 196
 197                                 config_get device "$ifc" device
 198                                 config_get ifname "$ifc" ifname
 199                                 config_get aliases "$ifc" aliases
 200                                 uci_revert_state network "$ifc"
 201                                 [ -n "$device" ] && uci_set_state network "$ifc" device "$device"
 202                                 [ -n "$ifname" ] && uci_set_state network "$ifc" ifname "$ifname"
 203                                 [ -n "$aliases" ] && uci_set_state network "$ifc" aliases "$aliases"
 204                         }
 205                 ;;
 206                 renew)
 207                         setup_interface update
 208                 ;;
 209                 bound)
 210                         setup_interface ifup
 211                 ;;
 212         esac
 213 done
 214
 215 # user rules
 216 [ -f /etc/udhcpc.user ] && . /etc/udhcpc.user
 217
 218 exit 0