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" "$4"
  12 }
  13
  14 setup_interface () {
  15         local old_ip
  16         local old_broadcast
  17         local old_subnet
  18         local old_router
  19         local old_dns
  20         local user_dns
  21         local user_router
  22         local user_metric
  23
  24         [ -n "$ifc" ] && {
  25                 old_ip="$(uci_get_state network "$ifc" ipaddr)"
  26                 old_broadcast="$(uci_get_state network "$ifc" broadcast)"
  27                 old_subnet="$(uci_get_state network "$ifc" netmask)"
  28         }
  29
  30         [ "$ip" != "$old_ip" ] \
  31         || [ "${broadcast:-+}" != "$old_broadcast" ] \
  32         || [ "${subnet:-255.255.255.0}" != "$old_subnet" ] && {
  33                 echo "udhcpc: ifconfig $interface $ip netmask ${subnet:-255.255.255.0} broadcast ${broadcast:-+}"
  34                 ifconfig $interface $ip netmask ${subnet:-255.255.255.0} broadcast ${broadcast:-+}
  35
  36                 change_state network "$ifc" ipaddr "$ip"
  37                 change_state network "$ifc" broadcast "${broadcast:-+}"
  38                 change_state network "$ifc" netmask "${subnet:-255.255.255.0}"
  39         }
  40
  41
  42         # Default Route
  43         [ -n "$ifc" ] && {
  44                 change_state network "$ifc" lease_gateway "$router"
  45                 old_router="$(uci_get_state network "$ifc" gateway)"
  46                 user_router="$(uci_get network "$ifc" gateway)"
  47                 user_metric="$(uci_get network "$ifc" metric)"
  48                 [ -n "$user_router" ] && router="$user_router"
  49         }
  50
  51         [ -n "$router" ] && [ "$router" != "0.0.0.0" ] && [ "$router" != "255.255.255.255" ] && [ "$router" != "$old_router" ] && {
  52                 echo "udhcpc: setting default routers: $router"
  53
  54                 local valid_gw=""
  55                 for i in $router ; do
  56                         route add default gw $i ${user_metric:+metric $user_metric} dev $interface
  57                         valid_gw="${valid_gw:+$valid_gw|}$i"
  58                 done
  59
  60                 eval $(route -n | awk '
  61                         /^0.0.0.0\W{9}('$valid_gw')\W/ {next}
  62                         /^0.0.0.0/ {print "route del -net "$1" gw "$2";"}
  63                 ')
  64
  65                 change_state network "$ifc" gateway "$router"
  66         }
  67
  68         # CIDR STATIC ROUTES (rfc3442)
  69         [ -n "$cidrroute" ] && {
  70                 # This defines how many CIDR Routes can be assigned so that we do not enter
  71                 # an endless loop on malformed data
  72                 MAXCIDRROUTES=24;
  73                 while [ ${MAXCIDRROUTES} -gt "0" ]; do
  74                         # Format is
  75                         # $MASK $NW $GW
  76                         # $NW == AAA.BBB.CCC.DDD
  77                         # $GW == EEE.FFF.CCC.DDD
  78                         # $MASK AAA.[BBB].[CCC].[DDD] EEE.FFF.GGG.HHH
  79                         #   1    2    3     4     5    6   7   8   9
  80                         MASK=$(echo $cidrroute | awk '{ print $1 }')
  81                         if [ ${MASK} = "0" ] ; then
  82                                 # $MASK EEE.FFF.GGG.HHH
  83                                 #   1    2   3   5   6
  84                                 NW="0"
  85                                 GW=$(echo $cidrroute | awk '{ print $2"."$3"."$4"."$5 }' )
  86                         elif [ ${MASK} -le "8" ] ; then
  87                                 # $MASK AAA EEE.FFF.GGG.HHH
  88                                 #   1    2   3   5   6   7
  89                                 NW=$(echo $cidrroute | awk '{ print $2 }' )
  90                                 GW=$(echo $cidrroute | awk '{ print $3"."$4"."$5"."$6 }' )
  91                         elif [ ${MASK} -le "16" ] ; then
  92                                 # $MASK AAA.BBB EEE.FFF.GGG.HHH
  93                                 #   1    2   3   5   6   7   8
  94                                 NW=$(echo $cidrroute | awk '{ print $2"."$3 }' )
  95                                 GW=$(echo $cidrroute | awk '{ print $4"."$5"."$6"."$7 }' )
  96                         elif [ ${MASK} -le "24" ] ; then
  97                                 # $MASK AAA.BBB.CCC EEE.FFF.GGG.HHH
  98                                 #   1    2   3   4   5   6   7   8
  99                                 NW=$(echo $cidrroute | awk '{ print $2"."$3"."$4 }' )
 100                                 GW=$(echo $cidrroute | awk '{ print $5"."$6"."$7"."$8 }' )
 101
 102                         else
 103                                 # $MASK AAA.BBB.CCC.DDD EEE.FFF.GGG.HHH
 104                                 #   1    2   3   4   5   6   7   8   9
 105                                 NW=$(echo $cidrroute | awk '{ print $2"."$3"."$4"."$5 }' )
 106                                 GW=$(echo $cidrroute | awk '{ print $6"."$7"."$8"."$9 }' )
 107                         fi
 108                         echo [$ROUTECOUNTER] Route Network: $NW/$MASK Gateway: $GW on $interface
 109
 110                         # TODO: Check for malformed data here to eliminate counter workaround
 111                         # Malformed data is: ... or xxx... or xxx.yyy.. or xxx.yyy.zzz.
 112
 113                         [ -n "$NW" ] && [ -n "$GW" ] && {
 114                                 route add $NW gw $GW dev $interface
 115                         }
 116
 117                         # Clear the strings incase they don't get set next time around
 118                         if [ ${NW} = "0" ]; then
 119                                 NW=""
 120                         fi
 121                         TMP="$MASK $NW $GW "
 122                         NW=""
 123                         GW=""
 124
 125                         # Remove the '.' so that we can delete them from the input with sed
 126                         TMP=$(echo $TMP | sed "s/\./ /g")
 127
 128                         # Remove the previous entry from cidrroute
 129                         cidrroute=$(echo $cidrroute | sed "s/$TMP//g")
 130
 131                         # Add to counter
 132                         let ROUTECOUNTER=$ROUTECOUNTER+1;
 133                         let MAXCIDRROUTES=$MAXCIDRROUTES-1;
 134
 135                         # Leave the loop if cidrroutes is empty (we've parsed everything)
 136                         [ ! -n "$cidrroute" ] && break
 137
 138                 done
 139
 140                 echo "done."
 141         }
 142
 143         # DNS
 144         old_dns=$(uci_get_state network "$ifc" dns)
 145         old_domain=$(uci_get_state network "$ifc" dnsdomain)
 146         user_dns=$(uci_get "network.$ifc.dns")
 147         [ -n "$user_dns" ] && dns="$user_dns"
 148
 149         [ -n "$dns" ] && [ "$dns" != "$old_dns" -o -n "$user_dns" ] && {
 150                 echo "udhcpc: setting dns servers: $dns"
 151                 add_dns "$ifc" $dns
 152
 153                 [ -n "$domain" ] && [ "$domain" != "$old_domain" ] && {
 154                         echo "udhcpc: setting dns domain: $domain"
 155                         sed -i -e "${old_domain:+/^search $old_domain$/d; }/^search $domain$/d" "${RESOLV_CONF}"
 156                         echo "search $domain" >> "${RESOLV_CONF}"
 157                         change_state network "$ifc" dnsdomain "$domain"
 158                 }
 159         }
 160
 161         [ -n "$ifc" ] || return
 162
 163         # UCI State
 164         change_state network "$ifc" lease_server "$serverid"
 165         change_state network "$ifc" lease_acquired "$(date '+%s')"
 166         change_state network "$ifc" lease_lifetime "$lease"
 167         [ -n "$ntpsrv" ] &&     change_state network "$ifc" lease_ntpsrv "$ntpsrv"
 168         [ -n "$timesvr" ] &&    change_state network "$ifc" lease_timesrv "$timesvr"
 169         [ -n "$hostname" ] &&   change_state network "$ifc" lease_hostname "$hostname"
 170         [ -n "$timezone" ] &&   change_state network "$ifc" lease_timezone "$timezone"
 171
 172
 173         # Hotplug
 174         env -i ACTION="$1" INTERFACE="$ifc" DEVICE="$ifname" PROTO=dhcp /sbin/hotplug-call iface
 175 }
 176
 177
 178 scan_interfaces
 179 applied=
 180 for ifc in $interfaces __default; do
 181         if [ "$ifc" = __default ]; then
 182                 ifc=""
 183                 [ -n "$applied" ] && continue
 184         else
 185                 config_get ifname "$ifc" ifname
 186                 [ "$ifname" = "$interface" ] || continue
 187
 188                 config_get proto "$ifc" proto
 189                 [ "$proto" = "dhcp" ] || continue
 190                 applied=true
 191         fi
 192
 193         case "$1" in
 194                 deconfig)
 195                         ifconfig "$interface" 0.0.0.0
 196                         [ -n "$ifc" ] && {
 197                                 env -i ACTION="ifdown" INTERFACE="$ifc" DEVICE="$ifname" PROTO=dhcp /sbin/hotplug-call iface
 198
 199                                 config_get device "$ifc" device
 200                                 config_get ifname "$ifc" ifname
 201                                 config_get aliases "$ifc" aliases
 202                                 uci_revert_state network "$ifc"
 203                                 [ -n "$device" ] && uci_set_state network "$ifc" device "$device"
 204                                 [ -n "$ifname" ] && uci_set_state network "$ifc" ifname "$ifname"
 205                                 [ -n "$aliases" ] && uci_set_state network "$ifc" aliases "$aliases"
 206                         }
 207                 ;;
 208                 renew)
 209                         setup_interface update
 210                 ;;
 211                 bound)
 212                         setup_interface ifup
 213                 ;;
 214         esac
 215 done
 216
 217 # user rules
 218 [ -f /etc/udhcpc.user ] && . /etc/udhcpc.user
 219
 220 exit 0