package/base-files/default/lib/network/config.sh

   1 #!/bin/sh
   2 # Copyright (C) 2006 OpenWrt.org
   3
   4 # DEBUG="echo"
   5
   6 find_config() {
   7         local iftype iface ifn
   8         for ifn in $interfaces; do
   9                 config_get iftype "$ifn" type
  10                 config_get iface "$ifn" ifname
  11                 config_get device "$ifn" device
  12                 for ifc in ${device:-$iface}; do
  13                         [ "$ifc" = "$1" ] && {
  14                                 echo "$ifn"
  15                                 return 0
  16                         }
  17                 done
  18         done
  19
  20         return 1;
  21 }
  22
  23 scan_interfaces() {
  24         local mode iftype iface
  25         interfaces=
  26         config_cb() {
  27                 config_get iftype "$CONFIG_SECTION" TYPE
  28                 case "$iftype" in
  29                         interface)
  30                                 config_get proto "$CONFIG_SECTION" proto
  31                                 append interfaces "$CONFIG_SECTION"
  32                                 ( type "scan_$proto" ) >/dev/null 2>/dev/null && eval "scan_$proto '$CONFIG_SECTION'"
  33                         ;;
  34                 esac
  35         }
  36         config_load network
  37 }
  38
  39 add_vlan() {
  40         local vif="${1%\.*}"
  41
  42         [ "$1" = "$vif" ] || ifconfig "$1" >/dev/null 2>/dev/null || {
  43                 ifconfig "$vif" up 2>/dev/null >/dev/null || add_vlan "$vif"
  44                 $DEBUG vconfig add "$vif" "${1##*\.}"
  45         }
  46 }
  47
  48 setup_interface() {
  49         local iface="$1"
  50         local config="$2"
  51         local proto="$3"
  52
  53         [ -n "$config" ] || {
  54                 config=$(find_config "$iface")
  55                 [ "$?" = 0 ] || return 1
  56         }
  57
  58         [ -n "$proto" ] || {
  59                 config_get proto "$config" proto
  60         }
  61
  62         config_get iftype "$config" type
  63
  64         # Setup VLAN interfaces
  65         add_vlan "$iface"
  66
  67         # Setup bridging
  68         case "$iftype" in
  69                 bridge)
  70                         ifconfig "$iface" up 2>/dev/null >/dev/null
  71                         ifconfig "br-$config" 2>/dev/null >/dev/null && {
  72                                 $DEBUG brctl addif "br-$config" "$iface"
  73                                 return 0
  74                         } || {
  75                                 $DEBUG brctl addbr "br-$config"
  76                                 $DEBUG brctl setfd "br-$config" 0
  77                                 $DEBUG brctl addif "br-$config" "$iface"
  78                                 iface="br-$config"
  79                         }
  80                 ;;
  81         esac
  82
  83         # Interface settings
  84         config_get mtu "$config" mtu
  85         $DEBUG ifconfig "$iface" ${mtu:+mtu $mtu} up
  86
  87         pidfile="/var/run/$iface.pid"
  88         case "$proto" in
  89                 static)
  90                         config_get ipaddr "$config" ipaddr
  91                         config_get netmask "$config" netmask
  92                         [ -z "$ipaddr" -o -z "$netmask" ] && return 1
  93
  94                         config_get ip6addr "$config" ip6addr
  95                         config_get gateway "$config" gateway
  96                         config_get dns "$config" dns
  97
  98                         $DEBUG ifconfig "$iface" "$ipaddr" netmask "$netmask"
  99                         [ -z "$gateway" ] || route add default gw "$gateway"
 100                         [ -z "$dns" -o -f /tmp/resolv.conf ] || {
 101                                 for ns in $dns; do
 102                                         echo "nameserver $ns" >> /tmp/resolv.conf
 103                                 done
 104                         }
 105
 106                         env -i ACTION="ifup" INTERFACE="config" DEVICE="$iface" PROTO=static /sbin/hotplug "iface" &
 107                 ;;
 108                 dhcp)
 109                         pid="$(cat "$pidfile" 2>/dev/null)"
 110                         [ -n "$pid" -a -d "/proc/$pid" ] && kill -9 "$pid"
 111
 112                         config_get ipaddr "$config" ipaddr
 113                         config_get netmask "$config" netmask
 114                         config_get hostname "$config" hostname
 115                         config_get proto1 "$config" proto
 116
 117                         [ -z "$ipaddr" ] || \
 118                                 $DEBUG ifconfig "$iface" "$ipaddr" ${netmask:+netmask "$netmask"}
 119
 120                         # don't stay running in background if dhcp is not the main proto on the interface (e.g. when using pptp)
 121                         [ "$proto1" != "$proto" ] && dhcpopts="-n -q"
 122                         $DEBUG udhcpc -i "$iface" ${ipaddr:+-r $ipaddr} ${hostname:+-H $hostname} -b -p "$pidfile" ${dhcpopts:- -R &}
 123                 ;;
 124                 *)
 125                         if ( eval "type setup_interface_$proto" ) >/dev/null 2>/dev/null; then
 126                                 eval "setup_interface_$proto '$iface' '$config' '$proto'"
 127                         else
 128                                 echo "Interface type $proto not supported."
 129                                 return 1
 130                         fi
 131                 ;;
 132         esac
 133 }
 134