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 "$ifn" ifnames
  14                         ;;
  15                 esac
  16                 config_get device "$ifn" device
  17                 for ifc in ${device:-$iface}; do
  18                         [ "$ifc" = "$1" ] && {
  19                                 echo "$ifn"
  20                                 return 0
  21                         }
  22                 done
  23         done
  24
  25         return 1;
  26 }
  27
  28 scan_interfaces() {
  29         local mode iftype iface
  30         interfaces=
  31         config_cb() {
  32                 config_get iftype "$CONFIG_SECTION" TYPE
  33                 case "$iftype" in
  34                         interface)
  35                                 config_get iftype "$CONFIG_SECTION" type
  36                                 config_get mode "$CONFIG_SECTION" proto
  37                                 case "$iftype" in
  38                                         bridge)
  39                                                 config_get iface "$CONFIG_SECTION" ifname
  40                                                 iface="${iface:-br-$CONFIG_SECTION}"
  41                                                 config_set "$CONFIG_SECTION" ifname "$iface"
  42                                         ;;
  43                                 esac
  44                                 append interfaces "$CONFIG_SECTION"
  45                                 ( type "scan_$mode" ) >/dev/null 2>/dev/null && eval "scan_$mode '$CONFIG_SECTION'"
  46                         ;;
  47                 esac
  48         }
  49         config_load network
  50 }
  51
  52 add_vlan() {
  53         local vif="${1%\.*}"
  54
  55         [ "$1" = "$vif" ] || ifconfig "$1" >/dev/null 2>/dev/null || {
  56                 ifconfig "$vif" up 2>/dev/null >/dev/null || add_vlan "$vif"
  57                 $DEBUG vconfig add "$vif" "${1##*\.}"
  58         }
  59 }
  60
  61 setup_interface() {
  62         local iface="$1"
  63         local config="$2"
  64         local proto="$3"
  65
  66         [ -n "$config" ] || {
  67                 config=$(find_config "$iface")
  68                 [ "$?" = 0 ] || return 1
  69         }
  70
  71         [ -n "$proto" ] || {
  72                 config_get proto "$config" proto
  73         }
  74
  75         config_get iftype "$config" type
  76
  77         # Setup VLAN interfaces
  78         add_vlan "$iface"
  79
  80         # Setup bridging
  81         case "$iftype" in
  82                 bridge)
  83                         config_get bridge_ifname "$config" ifname
  84                         ifconfig "$iface" up 2>/dev/null >/dev/null
  85                         ifconfig "$bridge_ifname" 2>/dev/null >/dev/null && {
  86                                 $DEBUG brctl addif "$bridge_ifname" "$iface"
  87                                 return 0
  88                         } || {
  89                                 $DEBUG brctl addbr "$bridge_ifname"
  90                                 $DEBUG brctl setfd "$bridge_ifname" 0
  91                                 $DEBUG brctl addif "$bridge_ifname" "$iface"
  92                                 iface="$bridge_ifname"
  93                         }
  94                 ;;
  95         esac
  96
  97         # Interface settings
  98         config_get mtu "$config" mtu
  99         $DEBUG ifconfig "$iface" ${mtu:+mtu $mtu} up
 100
 101         pidfile="/var/run/$iface.pid"
 102         case "$proto" in
 103                 static)
 104                         config_get ipaddr "$config" ipaddr
 105                         config_get netmask "$config" netmask
 106                         [ -z "$ipaddr" -o -z "$netmask" ] && return 1
 107
 108                         config_get ip6addr "$config" ip6addr
 109                         config_get gateway "$config" gateway
 110                         config_get dns "$config" dns
 111
 112                         $DEBUG ifconfig "$iface" "$ipaddr" netmask "$netmask"
 113                         [ -z "$gateway" ] || route add default gw "$gateway"
 114                         [ -z "$dns" -o -f /tmp/resolv.conf ] || {
 115                                 for ns in $dns; do
 116                                         echo "nameserver $ns" >> /tmp/resolv.conf
 117                                 done
 118                         }
 119
 120                         env -i ACTION="ifup" INTERFACE="config" DEVICE="$iface" PROTO=static /sbin/hotplug "iface" &
 121                 ;;
 122                 dhcp)
 123                         pid="$(cat "$pidfile" 2>/dev/null)"
 124                         [ -n "$pid" -a -d "/proc/$pid" ] && kill -9 "$pid"
 125
 126                         config_get ipaddr "$config" ipaddr
 127                         config_get netmask "$config" netmask
 128                         config_get hostname "$config" hostname
 129                         config_get proto1 "$config" proto
 130
 131                         [ -z "$ipaddr" ] || \
 132                                 $DEBUG ifconfig "$iface" "$ipaddr" ${netmask:+netmask "$netmask"}
 133
 134                         # don't stay running in background if dhcp is not the main proto on the interface (e.g. when using pptp)
 135                         [ "$proto1" != "$proto" ] && dhcpopts="-n -q"
 136                         $DEBUG udhcpc -i "$iface" ${ipaddr:+-r $ipaddr} ${hostname:+-H $hostname} -b -p "$pidfile" ${dhcpopts:- -R &}
 137                 ;;
 138                 *)
 139                         if ( eval "type setup_interface_$proto" ) >/dev/null 2>/dev/null; then
 140                                 eval "setup_interface_$proto '$iface' '$config' '$proto'"
 141                         else
 142                                 echo "Interface type $proto not supported."
 143                                 return 1
 144                         fi
 145                 ;;
 146         esac
 147 }
 148