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 "$ifn" ifname
  11                 case "$iftype" in
  12                         bridge)
  13                                 config_get iface "$ifn" ifnames
  14                         ;;
  15                 esac
  16                 for ifc in $iface; do
  17                         [ "$ifc" = "$1" ] && {
  18                                 echo "$ifn"
  19                                 return 0
  20                         }
  21                 done
  22         done
  23
  24         return 1;
  25 }
  26
  27 scan_interfaces() {
  28         local mode iftype iface
  29         interfaces=
  30         config_cb() {
  31                 config_get iftype "$CONFIG_SECTION" TYPE
  32                 case "$iftype" in
  33                         interface)
  34                                 config_get iftype "$CONFIG_SECTION" type
  35                                 config_get mode "$CONFIG_SECTION" proto
  36                                 case "$iftype" in
  37                                         bridge)
  38                                                 config_get iface "$CONFIG_SECTION" ifname
  39                                                 iface="${iface:-br-$CONFIG_SECTION}"
  40                                                 config_set "$CONFIG_SECTION" ifname "$iface"
  41                                         ;;
  42                                 esac
  43                                 append interfaces "$CONFIG_SECTION"
  44                                 ( type "scan_$mode" ) >/dev/null 2>/dev/null && eval "scan_$mode '$CONFIG_SECTION'"
  45                         ;;
  46                 esac
  47         }
  48         config_load network
  49 }
  50
  51 add_vlan() {
  52         local vif="${1%\.*}"
  53
  54         [ "$1" = "$vif" ] || ifconfig "$1" >/dev/null 2>/dev/null || {
  55                 ifconfig "$vif" up 2>/dev/null >/dev/null || add_vlan "$vif"
  56                 $DEBUG vconfig add "$vif" "${1##*\.}"
  57         }
  58 }
  59
  60 setup_interface() {
  61         local iface="$1"
  62         local config="$2"
  63         local proto="$3"
  64
  65         [ -n "$config" ] || {
  66                 config=$(find_config "$iface")
  67                 [ "$?" = 0 ] || return 1
  68         }
  69
  70         [ -n "$proto" ] || {
  71                 config_get proto "$config" proto
  72         }
  73
  74         config_get iftype "$config" type
  75
  76         # Setup VLAN interfaces
  77         add_vlan "$iface"
  78
  79         # Setup bridging
  80         case "$iftype" in
  81                 bridge)
  82                         config_get bridge_ifname "$config" ifname
  83                         ifconfig "$iface" up 2>/dev/null >/dev/null
  84                         ifconfig "$bridge_ifname" 2>/dev/null >/dev/null && {
  85                                 $DEBUG brctl addif "$bridge_ifname" "$iface"
  86                                 return 0
  87                         } || {
  88                                 $DEBUG brctl addbr "$bridge_ifname"
  89                                 $DEBUG brctl setfd "$bridge_ifname" 0
  90                                 $DEBUG brctl addif "$bridge_ifname" "$iface"
  91                                 iface="$bridge_ifname"
  92                         }
  93                 ;;
  94         esac
  95
  96         # Interface settings
  97         config_get mtu "$config" mtu
  98         $DEBUG ifconfig "$iface" ${mtu:+mtu $mtu} up
  99
 100         pidfile="/var/run/$iface.pid"
 101         case "$proto" in
 102                 static)
 103                         config_get ipaddr "$config" ipaddr
 104                         config_get netmask "$config" netmask
 105                         [ -z "$ipaddr" -o -z "$netmask" ] && return 1
 106
 107                         config_get ip6addr "$config" ip6addr
 108                         config_get gateway "$config" gateway
 109                         config_get dns "$config" dns
 110
 111                         $DEBUG ifconfig "$iface" "$ipaddr" netmask "$netmask"
 112                         [ -z "$gateway" ] || route add default gw "$gateway"
 113                         [ -z "$dns" -o -f /tmp/resolv.conf ] || {
 114                                 for ns in $dns; do
 115                                         echo "nameserver $ns" >> /tmp/resolv.conf
 116                                 done
 117                         }
 118
 119                         env -i ACTION="ifup" INTERFACE="config" DEVICE="$iface" PROTO=static /sbin/hotplug "iface" &
 120                 ;;
 121                 dhcp)
 122                         pid="$(cat "$pidfile" 2>/dev/null)"
 123                         [ -n "$pid" -a -d "/proc/$pid" ] && kill -9 "$pid"
 124
 125                         config_get ipaddr "$config" ipaddr
 126                         config_get netmask "$config" netmask
 127                         config_get hostname "$config" hostname
 128                         config_get proto1 "$config" proto
 129
 130                         [ -z "$ipaddr" ] || \
 131                                 $DEBUG ifconfig "$iface" "$ipaddr" ${netmask:+netmask "$netmask"}
 132
 133                         # don't stay running in background if dhcp is not the main proto on the interface (e.g. when using pptp)
 134                         [ "$proto1" != "$proto" ] && dhcpopts="-n -q"
 135                         $DEBUG udhcpc -i "$iface" ${ipaddr:+-r $ipaddr} ${hostname:+-H $hostname} -b -p "$pidfile" ${dhcpopts:- -R &}
 136                 ;;
 137                 *)
 138                         if ( eval "type setup_interface_$proto" ) >/dev/null 2>/dev/null; then
 139                                 eval "setup_interface_$proto '$iface' '$config' '$proto'"
 140                         else
 141                                 echo "Interface type $proto not supported."
 142                                 return 1
 143                         fi
 144                 ;;
 145         esac
 146 }
 147