openwrt/package/base-files/default/etc/functions.sh

   1 #!/bin/ash
   2
   3 alias debug=${DEBUG:-:}
   4
   5 # valid interface?
   6 if_valid () (
   7   ifconfig "$1" >&- 2>&- ||
   8   [ "${1%%[0-9]}" = "br" ] ||
   9   {
  10     [ "${1%%[0-9]}" = "vlan" ] && (
  11       i=${1#vlan}
  12       hwname=$(nvram get vlan${i}hwname)
  13       hwaddr=$(nvram get ${hwname}macaddr)
  14       [ -z "$hwaddr" ] && return 1
  15
  16       vif=$(ifconfig -a | awk '/^eth.*'$hwaddr'/ {print $1; exit}' IGNORECASE=1)
  17       debug "# vlan$i => $vif"
  18
  19       $DEBUG ifconfig $vif up
  20       $DEBUG vconfig add $vif $i 2>&-
  21     )
  22   } ||
  23   { debug "# missing interface '$1' ignored"; false; }
  24 )
  25
  26 do_ifup() {
  27         if_proto=$(nvram get ${2}_proto)
  28         if=$(nvram get ${2}_ifname)
  29         [ "${if%%[0-9]}" = "ppp" ] && if=$(nvram get ${2}_device)
  30
  31         pidfile=/var/run/${if}.pid
  32         [ -f $pidfile ] && $DEBUG kill $(cat $pidfile)
  33
  34         case "$1" in
  35         static)
  36                 ip=$(nvram get ${2}_ipaddr)
  37                 netmask=$(nvram get ${2}_netmask)
  38                 gateway=$(nvram get ${2}_gateway)
  39                 mtu=$(nvram get ${2}_mtu)
  40                 static_route=$(nvram get ${2}_static_route)
  41
  42                 $DEBUG ifconfig $if $ip ${netmask:+netmask $netmask} ${mtu:+mtu $(($mtu))} broadcast + up
  43                 ${gateway:+$DEBUG route add default gw $gateway}
  44
  45                 [ -n "$static_route" ] && {
  46                         for route in $static_route; do
  47                                 if [ "$(echo $route | cut -d \/ -f2)" != "32" ];
  48                                 then
  49                                         route add -net $(echo $route | cut -d \/ -f1) netmask $(echo $route | cut -d \/ -f1) dev $if
  50                                 else
  51                                         route add -host $(echo $route | cut -d \/ -f1) dev $if
  52                                 fi
  53                         done
  54                 }
  55
  56                 [ -f /etc/resolv.conf ] || {
  57                         debug "# --- creating /etc/resolv.conf ---"
  58                         for dns in $(nvram get ${2}_dns); do
  59                                 echo "nameserver $dns" >> /etc/resolv.conf
  60                         done
  61                 }
  62
  63                 env -i ACTION="ifup" INTERFACE="${2}" PROTO=static /sbin/hotplug "iface" &
  64         ;;
  65         dhcp)
  66                 DHCP_IP=$(nvram get ${2}_ipaddr)
  67                 DHCP_NETMASK=$(nvram get ${2}_netmask)
  68                 mtu=$(nvram get ${2}_mtu)
  69                 $DEBUG ifconfig $if $ip ${netmask:+netmask $netmask} ${mtu:+mtu $(($mtu))} broadcast + up
  70
  71                 DHCP_ARGS="-i $if ${DHCP_IP:+-r $DHCP_IP} -b -p $pidfile"
  72                 DHCP_HOSTNAME=$(nvram get ${2}_hostname)
  73                 DHCP_HOSTNAME=${DHCP_HOSTNAME%%.*}
  74                 [ -z $DHCP_HOSTNAME ] || DHCP_ARGS="$DHCP_ARGS -H $DHCP_HOSTNAME"
  75                 [ "$if_proto" = "pptp" ] && DHCP_ARGS="$DHCP_ARGS -n -q" || DHCP_ARGS="$DHCP_ARGS -R &"
  76                 [ -r $pidfile ] && oldpid=$(cat $pidfile 2>&-)
  77                 ${DEBUG:-eval} "udhcpc $DHCP_ARGS"
  78                 [ -n "$oldpid" ] && pidof udhcpc | grep "$oldpid" >&- 2>&- && {
  79                         sleep 1
  80                         kill -9 $oldpid
  81                 }
  82                 # hotplug events are handled by /usr/share/udhcpc/default.script
  83         ;;
  84         none|"")
  85         ;;
  86         *)
  87                 [ -x "/sbin/ifup.$1" ] && { $DEBUG /sbin/ifup.$1 ${2}; exit; }
  88                 echo "### ifup ${2}: ignored ${2}_proto=\"$1\" (not supported)"
  89         ;;
  90         esac
  91 }