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 set_classless_routes() {
  15         local max=128
  16         local type
  17         while [ -n "$1" -a -n "$2" -a $max -gt 0 ]; do
  18                 [ ${1##*/} -eq 32 ] && type=host || type=net
  19                 echo "udhcpc: adding route for $type $1 via $2"
  20                 route add -$type "$1" gw "$2" dev "$interface"
  21                 max=$(($max-1))
  22                 shift 2
  23         done
  24 }
  25
  26 setup_interface () {
  27         local old_ip
  28         local old_broadcast
  29         local old_subnet
  30         local old_router
  31         local old_dns
  32         local user_dns
  33         local user_router
  34         local user_metric
  35
  36         [ -n "$ifc" ] && {
  37                 old_ip="$(uci_get_state network "$ifc" ipaddr)"
  38                 old_broadcast="$(uci_get_state network "$ifc" broadcast)"
  39                 old_subnet="$(uci_get_state network "$ifc" netmask)"
  40         }
  41
  42         [ "$ip" != "$old_ip" ] \
  43         || [ "${broadcast:-+}" != "$old_broadcast" ] \
  44         || [ "${subnet:-255.255.255.0}" != "$old_subnet" ] && {
  45                 echo "udhcpc: ifconfig $interface $ip netmask ${subnet:-255.255.255.0} broadcast ${broadcast:-+}"
  46                 ifconfig $interface $ip netmask ${subnet:-255.255.255.0} broadcast ${broadcast:-+}
  47
  48                 change_state network "$ifc" ipaddr "$ip"
  49                 change_state network "$ifc" broadcast "${broadcast:-+}"
  50                 change_state network "$ifc" netmask "${subnet:-255.255.255.0}"
  51         }
  52
  53
  54         # Default Route
  55         [ -n "$ifc" ] && {
  56                 change_state network "$ifc" lease_gateway "$router"
  57                 old_router="$(uci_get_state network "$ifc" gateway)"
  58                 user_router="$(uci_get network "$ifc" gateway)"
  59                 user_metric="$(uci_get network "$ifc" metric)"
  60                 [ -n "$user_router" ] && router="$user_router"
  61         }
  62
  63         [ -n "$router" ] && [ "$router" != "0.0.0.0" ] && [ "$router" != "255.255.255.255" ] && [ "$router" != "$old_router" ] && {
  64                 echo "udhcpc: setting default routers: $router"
  65
  66                 local valid_gw=""
  67                 for i in $router ; do
  68                         route add default gw $i ${user_metric:+metric $user_metric} dev $interface
  69                         valid_gw="${valid_gw:+$valid_gw|}$i"
  70                 done
  71
  72                 eval $(route -n | awk '
  73                         /^0.0.0.0\W{9}('$valid_gw')\W/ {next}
  74                         /^0.0.0.0/ {print "route del -net "$1" gw "$2";"}
  75                 ')
  76
  77                 change_state network "$ifc" gateway "$router"
  78         }
  79
  80         # CIDR STATIC ROUTES (rfc3442)
  81         [ -n "$staticroutes" ] && set_classless_routes $staticroutes
  82         [ -n "$msstaticroutes" ] && set_classless_routes $msstaticroutes
  83
  84         # DNS
  85         old_dns=$(uci_get_state network "$ifc" dns)
  86         old_domain=$(uci_get_state network "$ifc" dnsdomain)
  87         user_dns=$(uci_get "network.$ifc.dns")
  88         [ -n "$user_dns" ] && dns="$user_dns"
  89
  90         [ -n "$dns" ] && [ "$dns" != "$old_dns" -o -n "$user_dns" ] && {
  91                 echo "udhcpc: setting dns servers: $dns"
  92                 add_dns "$ifc" $dns
  93
  94                 [ -n "$domain" ] && [ "$domain" != "$old_domain" ] && {
  95                         echo "udhcpc: setting dns domain: $domain"
  96                         sed -i -e "${old_domain:+/^search $old_domain$/d; }/^search $domain$/d" "${RESOLV_CONF}"
  97                         echo "search $domain" >> "${RESOLV_CONF}"
  98                         change_state network "$ifc" dnsdomain "$domain"
  99                 }
 100         }
 101
 102         [ -n "$ifc" ] || return
 103
 104         # UCI State
 105         change_state network "$ifc" lease_server "$serverid"
 106         change_state network "$ifc" lease_acquired "$(sed -ne 's![^0-9].*$!!p' /proc/uptime)"
 107         change_state network "$ifc" lease_lifetime "$lease"
 108         [ -n "$ntpsrv" ] &&     change_state network "$ifc" lease_ntpsrv "$ntpsrv"
 109         [ -n "$timesvr" ] &&    change_state network "$ifc" lease_timesrv "$timesvr"
 110         [ -n "$hostname" ] &&   change_state network "$ifc" lease_hostname "$hostname"
 111         [ -n "$timezone" ] &&   change_state network "$ifc" lease_timezone "$timezone"
 112
 113
 114         # Hotplug
 115         env -i ACTION="$1" INTERFACE="$ifc" DEVICE="$ifname" PROTO=dhcp /sbin/hotplug-call iface
 116 }
 117
 118
 119 scan_interfaces
 120 applied=
 121 for ifc in $interfaces __default; do
 122         if [ "$ifc" = __default ]; then
 123                 ifc=""
 124                 [ -n "$applied" ] && continue
 125         else
 126                 config_get ifname "$ifc" ifname
 127                 [ "$ifname" = "$interface" ] || continue
 128
 129                 config_get proto "$ifc" proto
 130                 [ "$proto" = "dhcp" ] || continue
 131                 applied=true
 132         fi
 133
 134         case "$1" in
 135                 deconfig)
 136                         ifconfig "$interface" 0.0.0.0
 137                         [ -n "$ifc" ] && {
 138                                 env -i ACTION="ifdown" INTERFACE="$ifc" DEVICE="$ifname" PROTO=dhcp /sbin/hotplug-call iface
 139
 140                                 config_get device "$ifc" device
 141                                 config_get ifname "$ifc" ifname
 142                                 config_get aliases "$ifc" aliases
 143                                 uci_revert_state network "$ifc"
 144                                 [ -n "$device" ] && uci_set_state network "$ifc" device "$device"
 145                                 [ -n "$ifname" ] && uci_set_state network "$ifc" ifname "$ifname"
 146                                 [ -n "$aliases" ] && uci_set_state network "$ifc" aliases "$aliases"
 147                         }
 148                 ;;
 149                 renew)
 150                         setup_interface update
 151                 ;;
 152                 bound)
 153                         setup_interface ifup
 154                 ;;
 155         esac
 156 done
 157
 158 # user rules
 159 [ -f /etc/udhcpc.user ] && . /etc/udhcpc.user
 160
 161 exit 0