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