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=$(ifconfig -a | awk '{IGNORECASE=1} /^eth.*'$hwaddr'/ {print $1; exit}')
  20     debug "# vlan$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 )
  27
  28 wifi () (
  29   debug "### wifi $1 ###"
  30   if=$(awk 'gsub(":","") {print $1}' /proc/net/wireless)
  31   $DEBUG wlconf $if $1
  32 )
  33
  34 ifup () (
  35   type=$1
  36   debug "### ifup $type ###"
  37
  38   if=$(nvram_get ${type}_ifname)
  39   if [ "${if%%[0-9]}" = "ppp" ]; then
  40     if=$(nvram_get pppoe_ifname)
  41   fi
  42
  43   if_valid $if || return
  44
  45   $DEBUG ifconfig $if down
  46   if [ "${if%%[0-9]}" = "br" ]; then
  47     stp=$(nvram_get ${type}_stp)
  48     $DEBUG brctl delbr $if
  49     $DEBUG brctl addbr $if
  50     $DEBUG brctl setfd $if 0
  51     $DEBUG brctl stp $if $stp
  52     if_list=$(nvram_get ${type}_ifnames)
  53     for sif in $if_list; do {
  54       if_valid $sif || continue
  55       $DEBUG ifconfig $sif 0.0.0.0 up
  56       $DEBUG brctl addif $if $sif
  57     } done
  58   fi
  59
  60   if_mac=$(nvram_get ${type}_hwaddr)
  61   ${if_mac:+$DEBUG ifconfig $if hw ether $if_mac}
  62
  63   if_proto=$(nvram_get ${type}_proto)
  64   case "$if_proto" in
  65     static)
  66       if_ip=$(nvram_get ${type}_ipaddr)
  67       if_netmask=$(nvram_get ${type}_netmask)
  68       if_gateway=$(nvram_get ${type}_gateway)
  69
  70       $DEBUG ifconfig $if $if_ip ${if_netmask:+netmask $if_netmask} broadcast + up
  71       ${if_gateway:+$DEBUG route add default gw $if_gateway}
  72
  73       [ -f /etc/resolv.conf ] && return
  74
  75       debug "# --- creating /etc/resolv.conf ---"
  76       for dns in $(nvram_get ${type}_dns); do {
  77         echo "nameserver $dns" >> /etc/resolv.conf
  78       } done
  79     ;;
  80     dhcp)
  81       pidfile=/tmp/dhcp-${type}.pid
  82       if [ -f $pidfile ]; then
  83         $DEBUG kill $(cat $pidfile)
  84       fi
  85       ${DEBUG:-eval} "udhcpc -i $if -b -p $pidfile &"
  86     ;;
  87     pppoe)
  88       if_username=$(nvram_get ppp_username)
  89       if_password=$(nvram_get ppp_passwd)
  90       if_redial=$(nvram_get ppp_redialperiod)
  91       if_idletime=$(nvram_get ppp_idletime)
  92       if_mtu=$(nvram_get wan_mtu)
  93
  94       $DEBUG ifconfig $if 0.0.0.0 up
  95
  96       $DEBUG /sbin/pppoecd $if -u $if_username -p $if_password -i 0 -I $if_redial -T $if_idletim
  97       e -t $if_mtu -k
  98     ;;
  99     *)
 100       echo "### WARNING $if: $if_proto is not supported"
 101     ;;
 102   esac
 103 )
 104
 105 ifdown () (
 106   type=$1
 107   debug "### ifdown $type ###"
 108   if=$(nvram_get ${type}_ifname)
 109   if_valid $if || return
 110   kill $(cat /var/run/${if}.pid 2>-) 2>-
 111   $DEBUG ifconfig $if down
 112 )