root/etc/functions.sh

   1 #!/bin/ash
   2
   3 alias debug=${DEBUG:-:}
   4
   5 # allow env to override nvram
   6 nvram_get () {
   7  eval "echo \${$1:-\$(nvram get $1)}"
   8 }
   9 . /etc/nvram.overrides
  10
  11 # valid interface?
  12 if_valid () (
  13   [ "${1%%[0-9]}" = "vlan" ] && {
  14     i=${1#vlan}
  15     hwname=$(nvram_get vlan${i}hwname)
  16     hwaddr=$(nvram_get ${hwname}macaddr)
  17     [ -z "$hwaddr" ] && return 1
  18
  19     vif=$(ifconfig -a | awk '/^eth.*'$hwaddr'/ {print $1; exit}' IGNORECASE=1)
  20     debug "# vlan$i: $hwname $hwaddr => $vif"
  21
  22     $DEBUG ifconfig $vif up
  23     $DEBUG vconfig add $vif $i 2>/dev/null
  24   }
  25   ifconfig "$1" >/dev/null 2>&1 || [ "${1%%[0-9]}" = "br" ]
  26 )