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