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 ${if_proto}_ifname)
  30
  31         pidfile=/var/run/${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
  41                 $DEBUG ifconfig $if $ip ${netmask:+netmask $netmask} ${mtu:+mtu $(($mtu))} broadcast + up
  42                 ${gateway:+$DEBUG route add default gw $gateway}
  43
  44                 [ -f /etc/resolv.conf ] || {
  45                         debug "# --- creating /etc/resolv.conf ---"
  46                         for dns in $(nvram get ${2}_dns); do
  47                                 echo "nameserver $dns" >> /etc/resolv.conf
  48                         done
  49                 }
  50
  51                 env -i ACTION="ifup" INTERFACE="${2}" PROTO=static /sbin/hotplug "iface" &
  52         ;;
  53         dhcp)
  54                 DHCP_IP=$(nvram get ${2}_ipaddr)
  55                 DHCP_NETMASK=$(nvram get ${2}_netmask)
  56                 mtu=$(nvram get ${2}_mtu)
  57                 $DEBUG ifconfig $if $ip ${netmask:+netmask $netmask} ${mtu:+mtu $(($mtu))} broadcast + up
  58
  59                 DHCP_ARGS="-i $if ${DHCP_IP:+-r $DHCP_IP} -b -p $pidfile"
  60                 DHCP_HOSTNAME=$(nvram get ${2}_hostname)
  61                 DHCP_HOSTNAME=${DHCP_HOSTNAME%%.*}
  62                 [ -z $DHCP_HOSTNAME ] || DHCP_ARGS="$DHCP_ARGS -H $DHCP_HOSTNAME"
  63                 [ "$if_proto" = "pptp" ] && DHCP_ARGS="$DHCP_ARGS -n -q" || DHCP_ARGS="$DHCP_ARGS -R &"
  64                 [ -r $pidfile ] && oldpid=$(cat $pidfile 2>&-)
  65                 ${DEBUG:-eval} "udhcpc $DHCP_ARGS"
  66                 [ -n "$oldpid" ] && pidof udhcpc | grep "$oldpid" >&- 2>&- && {
  67                         sleep 1
  68                         kill -9 $oldpid
  69                 }
  70                 # hotplug events are handled by /usr/share/udhcpc/default.script
  71         ;;
  72         none|"")
  73         ;;
  74         *)
  75                 [ -x "/sbin/ifup.$1" ] && { $DEBUG /sbin/ifup.$1 ${2}; exit; }
  76                 echo "### ifup ${2}: ignored ${2}_proto=\"$1\" (not supported)"
  77         ;;
  78         esac
  79 }