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 "$router"
  63         }
  64
  65
  66         # DNS
  67         config_get old_dns "$ifc" dns
  68         user_dns=$(uci_get "network.$ifc.dns")
  69         [ -n "$user_dns" ] && dns="$user_dns"
  70
  71         [ -n "$dns" ] && [ ! -s "${RESOLV_CONF}.tmp" -o "$dns" != "$old_dns" ] && {
  72                 echo "udhcpc: setting dns servers: $dns"
  73                 echo -n > "${RESOLV_CONF}.tmp"
  74                 for i in $dns ; do
  75                         echo "nameserver $i" >> "${RESOLV_CONF}.tmp"
  76                 done
  77                 ${domain:+echo search $domain} >> "${RESOLV_CONF}.tmp"
  78                 mv "${RESOLV_CONF}.tmp" "$RESOLV_CONF"
  79
  80                 change_state network "$ifc" dnsdomain "$domain"
  81                 change_state network "$ifc" dns "$dns"
  82         }
  83
  84
  85         # UCI State
  86         change_state network "$ifc" lease_server "$serverid"
  87         change_state network "$ifc" lease_acquired "$(date '+%s')"
  88         change_state network "$ifc" lease_lifetime "$lease"
  89         [ -n "$ntpsrv" ] &&     change_state network "$ifc" lease_ntpsrv "$ntpsrv"
  90         [ -n "$timesvr" ] &&    change_state network "$ifc" lease_timesrv "$timesvr"
  91         [ -n "$hostname" ] &&   change_state network "$ifc" lease_hostname "$hostname"
  92         [ -n "$timezone" ] &&   change_state network "$ifc" lease_timezone "$timezone"
  93
  94
  95         # Hotplug
  96         env -i ACTION="$1" INTERFACE="$ifc" DEVICE="$ifname" PROTO=dhcp /sbin/hotplug-call iface
  97 }
  98
  99
 100 scan_interfaces
 101
 102 for ifc in $interfaces; do
 103         config_get ifname "$ifc" ifname
 104         [ "$ifname" = "$interface" ] || continue
 105
 106         config_get proto "$ifc" proto
 107         [ "$proto" = "dhcp" ] || continue
 108
 109         case "$1" in
 110                 deconfig)
 111                         ifconfig "$interface" 0.0.0.0
 112                         env -i ACTION="ifdown" INTERFACE="$ifc" DEVICE="$ifname" PROTO=dhcp /sbin/hotplug-call iface
 113
 114                         config_get device "$ifc" device
 115                         config_get ifname "$ifc" ifname
 116                         config_get aliases "$ifc" aliases
 117                         uci_revert_state network "$ifc"
 118                         [ -n "$device" ] && uci_set_state network "$ifc" device "$device"
 119                         [ -n "$ifname" ] && uci_set_state network "$ifc" ifname "$ifname"
 120                         [ -n "$aliases" ] && uci_set_state network "$ifc" aliases "$aliases"
 121                 ;;
 122                 renew)
 123                         setup_interface update
 124                 ;;
 125                 bound)
 126                         setup_interface ifup
 127                 ;;
 128         esac
 129
 130         # user rules
 131         [ -f /etc/udhcpc.user ] && . /etc/udhcpc.user
 132 done
 133
 134 exit 0