openwrt/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 device iface ifaces ifn
   8         for ifn in $interfaces; do
   9                 config_get iftype "$ifn" type
  10                 config_get iface "$ifn" ifname
  11                 case "$iftype" in
  12                         bridge) config_get ifaces "$ifn" ifnames;;
  13                 esac
  14                 config_get device "$ifn" device
  15                 for ifc in $device $iface $ifaces; do
  16                         [ "$ifc" = "$1" ] && {
  17                                 echo "$ifn"
  18                                 return 0
  19                         }
  20                 done
  21         done
  22
  23         return 1;
  24 }
  25
  26 scan_interfaces() {
  27         local mode iftype iface ifname device
  28         interfaces=
  29         config_cb() {
  30                 config_get iftype "$CONFIG_SECTION" TYPE
  31                 case "$iftype" in
  32                         interface)
  33                                 config_get proto "$CONFIG_SECTION" proto
  34                                 append interfaces "$CONFIG_SECTION"
  35                                 config_get iftype "$CONFIG_SECTION" type
  36                                 case "$iftype" in
  37                                         bridge)
  38                                                 config_get ifname "$CONFIG_SECTION" ifname
  39                                                 config_set "$CONFIG_SECTION" ifnames "$ifname"
  40                                                 config_set "$CONFIG_SECTION" ifname br-"$CONFIG_SECTION"
  41                                         ;;
  42                                 esac
  43                                 ( type "scan_$proto" ) >/dev/null 2>/dev/null && eval "scan_$proto '$CONFIG_SECTION'"
  44                         ;;
  45                 esac
  46         }
  47         config_load network
  48 }
  49
  50 add_vlan() {
  51         local vif="${1%\.*}"
  52
  53         [ "$1" = "$vif" ] || ifconfig "$1" >/dev/null 2>/dev/null || {
  54                 ifconfig "$vif" up 2>/dev/null >/dev/null || add_vlan "$vif"
  55                 $DEBUG vconfig add "$vif" "${1##*\.}"
  56         }
  57 }
  58
  59 setup_interface() {
  60         local iface="$1"
  61         local config="$2"
  62         local proto
  63
  64         [ -n "$config" ] || {
  65                 config=$(find_config "$iface")
  66                 [ "$?" = 0 ] || return 1
  67         }
  68
  69         proto="${3:-$(config_get "$config" proto)}"
  70         config_get iftype "$config" type
  71
  72         # Setup VLAN interfaces
  73         add_vlan "$iface"
  74
  75         # Setup bridging
  76         case "$iftype" in
  77                 bridge)
  78                         ifconfig "$iface" up 2>/dev/null >/dev/null
  79                         ifconfig "br-$config" 2>/dev/null >/dev/null && {
  80                                 $DEBUG brctl addif "br-$config" "$iface"
  81                                 return 0
  82                         } || {
  83                                 $DEBUG brctl addbr "br-$config"
  84                                 $DEBUG brctl setfd "br-$config" 0
  85                                 $DEBUG brctl addif "br-$config" "$iface"
  86                                 iface="br-$config"
  87                         }
  88                 ;;
  89         esac
  90
  91         # Interface settings
  92         config_get mtu "$config" mtu
  93         $DEBUG ifconfig "$iface" ${mtu:+mtu $mtu} up
  94
  95         pidfile="/var/run/$iface.pid"
  96         case "$proto" in
  97                 static)
  98                         config_get ipaddr "$config" ipaddr
  99                         config_get netmask "$config" netmask
 100                         [ -z "$ipaddr" -o -z "$netmask" ] && return 1
 101
 102                         config_get ip6addr "$config" ip6addr
 103                         config_get gateway "$config" gateway
 104                         config_get dns "$config" dns
 105
 106                         $DEBUG ifconfig "$iface" "$ipaddr" netmask "$netmask"
 107                         [ -z "$gateway" ] || route add default gw "$gateway"
 108                         [ -z "$dns" -o -f /tmp/resolv.conf ] || {
 109                                 for ns in $dns; do
 110                                         echo "nameserver $ns" >> /tmp/resolv.conf
 111                                 done
 112                         }
 113
 114                         env -i ACTION="ifup" INTERFACE="config" DEVICE="$iface" PROTO=static /sbin/hotplug "iface" &
 115                 ;;
 116                 dhcp)
 117                         pid="$(cat "$pidfile" 2>/dev/null)"
 118                         [ -n "$pid" -a -d "/proc/$pid" ] && kill -9 "$pid"
 119
 120                         config_get ipaddr "$config" ipaddr
 121                         config_get netmask "$config" netmask
 122                         config_get hostname "$config" hostname
 123                         config_get proto1 "$config" proto
 124
 125                         [ -z "$ipaddr" ] || \
 126                                 $DEBUG ifconfig "$iface" "$ipaddr" ${netmask:+netmask "$netmask"}
 127
 128                         # don't stay running in background if dhcp is not the main proto on the interface (e.g. when using pptp)
 129                         [ "$proto1" != "$proto" ] && dhcpopts="-n -q"
 130                         $DEBUG udhcpc -i "$iface" ${ipaddr:+-r $ipaddr} ${hostname:+-H $hostname} -b -p "$pidfile" ${dhcpopts:- -R &}
 131                 ;;
 132                 *)
 133                         if ( eval "type setup_interface_$proto" ) >/dev/null 2>/dev/null; then
 134                                 eval "setup_interface_$proto '$iface' '$config' '$proto'"
 135                         else
 136                                 echo "Interface type $proto not supported."
 137                                 return 1
 138                         fi
 139                 ;;
 140         esac
 141 }
 142