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" "$4"
  12 }
  13
  14 uci_get() {
  15         [ -n "$ifc" ] || return
  16         uci -P /dev/null get "$1" 2>/dev/null
  17 }
  18
  19 setup_interface () {
  20         local old_ip
  21         local old_broadcast
  22         local old_subnet
  23         local old_router
  24         local old_dns
  25         local user_dns
  26         local user_router
  27
  28         [ -n "$ifc" ] && {
  29                 config_get old_ip        "$ifc" ipaddr
  30                 config_get old_broadcast "$ifc" broadcast
  31                 config_get old_subnet    "$ifc" netmask
  32         }
  33
  34         [ "$ip" != "$old_ip" ] \
  35         || [ "${broadcast:-+}" != "$old_broadcast" ] \
  36         || [ "${subnet:-255.255.255.0}" != "$old_subnet" ] && {
  37                 echo "udhcpc: ifconfig $interface $ip netmask ${subnet:-255.255.255.0} broadcast ${broadcast:-+}"
  38                 ifconfig $interface $ip netmask ${subnet:-255.255.255.0} broadcast ${broadcast:-+}
  39
  40                 change_state network "$ifc" ipaddr "$ip"
  41                 change_state network "$ifc" broadcast "${broadcast:-+}"
  42                 change_state network "$ifc" netmask "${subnet:-255.255.255.0}"
  43         }
  44
  45
  46         # Default Route
  47         [ -n "$ifc" ] && {
  48                 change_state network "$ifc" lease_gateway "$router"
  49                 config_get old_router "$ifc" gateway
  50                 user_router=$(uci_get "network.$ifc.gateway")
  51                 [ -n "$user_router" ] && router="$user_router"
  52         }
  53
  54         [ -n "$router" ] && [ "$router" != "0.0.0.0" ] && [ "$router" != "255.255.255.255" ] && [ "$router" != "$old_router" ] && {
  55                 echo "udhcpc: setting default routers: $router"
  56
  57                 local valid_gw=""
  58                 for i in $router ; do
  59                         route add default gw $i dev $interface
  60                         valid_gw="${valid_gw:+$valid_gw|}$i"
  61                 done
  62
  63                 eval $(route -n | awk '
  64                         /^0.0.0.0\W{9}('$valid_gw')\W/ {next}
  65                         /^0.0.0.0/ {print "route del -net "$1" gw "$2";"}
  66                 ')
  67
  68                 change_state network "$ifc" gateway "$router"
  69         }
  70
  71         # CIDR STATIC ROUTES (rfc3442)
  72         [ -n "$cidrroute" ] && {
  73                 # This defines how many CIDR Routes can be assigned so that we do not enter
  74                 # an endless loop on malformed data
  75                 MAXCIDRROUTES=24;
  76                 while [ ${MAXCIDRROUTES} -gt "0" ]; do
  77                         # Format is
  78                         # $MASK $NW $GW
  79                         # $NW == AAA.BBB.CCC.DDD
  80                         # $GW == EEE.FFF.CCC.DDD
  81                         # $MASK AAA.[BBB].[CCC].[DDD] EEE.FFF.GGG.HHH
  82                         #   1    2    3     4     5    6   7   8   9
  83                         MASK=$(echo $cidrroute | awk '{ print $1 }')
  84                         if [ ${MASK} = "0" ] ; then
  85                                 # $MASK EEE.FFF.GGG.HHH
  86                                 #   1    2   3   5   6
  87                                 NW="0"
  88                                 GW=$(echo $cidrroute | awk '{ print $2"."$3"."$4"."$5 }' )
  89                         elif [ ${MASK} -le "8" ] ; then
  90                                 # $MASK AAA EEE.FFF.GGG.HHH
  91                                 #   1    2   3   5   6   7
  92                                 NW=$(echo $cidrroute | awk '{ print $2 }' )
  93                                 GW=$(echo $cidrroute | awk '{ print $3"."$4"."$5"."$6 }' )
  94                         elif [ ${MASK} -le "16" ] ; then
  95                                 # $MASK AAA.BBB EEE.FFF.GGG.HHH
  96                                 #   1    2   3   5   6   7   8
  97                                 NW=$(echo $cidrroute | awk '{ print $2"."$3 }' )
  98                                 GW=$(echo $cidrroute | awk '{ print $4"."$5"."$6"."$7 }' )
  99                         elif [ ${MASK} -le "24" ] ; then
 100                                 # $MASK AAA.BBB.CCC EEE.FFF.GGG.HHH
 101                                 #   1    2   3   4   5   6   7   8
 102                                 NW=$(echo $cidrroute | awk '{ print $2"."$3"."$4 }' )
 103                                 GW=$(echo $cidrroute | awk '{ print $5"."$6"."$7"."$8 }' )
 104
 105                         else
 106                                 # $MASK AAA.BBB.CCC.DDD EEE.FFF.GGG.HHH
 107                                 #   1    2   3   4   5   6   7   8   9
 108                                 NW=$(echo $cidrroute | awk '{ print $2"."$3"."$4"."$5 }' )
 109                                 GW=$(echo $cidrroute | awk '{ print $6"."$7"."$8"."$9 }' )
 110                         fi
 111                         echo [$ROUTECOUNTER] Route Network: $NW/$MASK Gateway: $GW on $interface
 112
 113                         # TODO: Check for malformed data here to eliminate counter workaround
 114                         # Malformed data is: ... or xxx... or xxx.yyy.. or xxx.yyy.zzz.
 115
 116                         [ -n "$NW" ] && [ -n "$GW" ] && {
 117                                 route add $NW gw $GW dev $interface
 118                         }
 119
 120                         # Clear the strings incase they don't get set next time around
 121                         if [ ${NW} = "0" ]; then
 122                                 NW=""
 123                         fi
 124                         TMP="$MASK $NW $GW "
 125                         NW=""
 126                         GW=""
 127
 128                         # Remove the '.' so that we can delete them from the input with sed
 129                         TMP=$(echo $TMP | sed "s/\./ /g")
 130
 131                         # Remove the previous entry from cidrroute
 132                         cidrroute=$(echo $cidrroute | sed "s/$TMP//g")
 133
 134                         # Add to counter
 135                         let ROUTECOUNTER=$ROUTECOUNTER+1;
 136                         let MAXCIDRROUTES=$MAXCIDRROUTES-1;
 137
 138                         # Leave the loop if cidrroutes is empty (we've parsed everything)
 139                         [ ! -n "$cidrroute" ] && break
 140
 141                 done
 142
 143                 echo "done."
 144         }
 145
 146         # DNS
 147         config_get old_dns "$ifc" dns
 148         user_dns=$(uci_get "network.$ifc.dns")
 149         [ -n "$user_dns" ] && dns="$user_dns"
 150
 151         [ -n "$dns" ] && [ ! -s "${RESOLV_CONF}" -o "$dns" != "$old_dns" ] && {
 152                 echo "udhcpc: setting dns servers: $dns"
 153                 echo -n > "${RESOLV_CONF}.tmp"
 154                 for i in $dns ; do
 155                         echo "nameserver $i" >> "${RESOLV_CONF}.tmp"
 156                 done
 157                 ${domain:+echo search $domain} >> "${RESOLV_CONF}.tmp"
 158                 mv "${RESOLV_CONF}.tmp" "$RESOLV_CONF"
 159
 160                 change_state network "$ifc" dnsdomain "$domain"
 161                 change_state network "$ifc" dns "$dns"
 162         }
 163
 164         [ -n "$ifc" ] || return
 165
 166         # UCI State
 167         change_state network "$ifc" lease_server "$serverid"
 168         change_state network "$ifc" lease_acquired "$(date '+%s')"
 169         change_state network "$ifc" lease_lifetime "$lease"
 170         [ -n "$ntpsrv" ] &&     change_state network "$ifc" lease_ntpsrv "$ntpsrv"
 171         [ -n "$timesvr" ] &&    change_state network "$ifc" lease_timesrv "$timesvr"
 172         [ -n "$hostname" ] &&   change_state network "$ifc" lease_hostname "$hostname"
 173         [ -n "$timezone" ] &&   change_state network "$ifc" lease_timezone "$timezone"
 174
 175
 176         # Hotplug
 177         env -i ACTION="$1" INTERFACE="$ifc" DEVICE="$ifname" PROTO=dhcp /sbin/hotplug-call iface
 178 }
 179
 180
 181 scan_interfaces
 182 applied=
 183 for ifc in $interfaces __default; do
 184         if [ "$ifc" = __default ]; then
 185                 ifc=""
 186                 [ -n "$applied" ] && continue
 187         else
 188                 config_get ifname "$ifc" ifname
 189                 [ "$ifname" = "$interface" ] || continue
 190
 191                 config_get proto "$ifc" proto
 192                 [ "$proto" = "dhcp" ] || continue
 193                 applied=true
 194         fi
 195
 196         case "$1" in
 197                 deconfig)
 198                         ifconfig "$interface" 0.0.0.0
 199                         [ -n "$ifc" ] && {
 200                                 env -i ACTION="ifdown" INTERFACE="$ifc" DEVICE="$ifname" PROTO=dhcp /sbin/hotplug-call iface
 201
 202                                 config_get device "$ifc" device
 203                                 config_get ifname "$ifc" ifname
 204                                 config_get aliases "$ifc" aliases
 205                                 uci_revert_state network "$ifc"
 206                                 [ -n "$device" ] && uci_set_state network "$ifc" device "$device"
 207                                 [ -n "$ifname" ] && uci_set_state network "$ifc" ifname "$ifname"
 208                                 [ -n "$aliases" ] && uci_set_state network "$ifc" aliases "$aliases"
 209                         }
 210                 ;;
 211                 renew)
 212                         setup_interface update
 213                 ;;
 214                 bound)
 215                         setup_interface ifup
 216                 ;;
 217         esac
 218 done
 219
 220 # user rules
 221 [ -f /etc/udhcpc.user ] && . /etc/udhcpc.user
 222
 223 exit 0