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 "$CONFIG_SECTION" type
  36                                 config_get ifname "$CONFIG_SECTION" ifname
  37                                 config_set "$CONFIG_SECTION" device "$ifname"
  38                                 case "$iftype" in
  39                                         bridge)
  40                                                 config_set "$CONFIG_SECTION" ifnames "$ifname"
  41                                                 config_set "$CONFIG_SECTION" ifname br-"$CONFIG_SECTION"
  42                                         ;;
  43                                 esac
  44                                 ( type "scan_$proto" ) >/dev/null 2>/dev/null && eval "scan_$proto '$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="$2"
  63         local proto
  64
  65         [ -n "$config" ] || {
  66                 config=$(find_config "$iface")
  67                 [ "$?" = 0 ] || return 1
  68         }
  69
  70         proto="${3:-$(config_get "$config" proto)}"
  71         config_get iftype "$config" type
  72
  73         ifconfig "$iface" 2>/dev/null >/dev/null && {
  74                 # make sure the interface is removed from any existing bridge
  75                 unbridge "$iface"
  76         }
  77
  78         # Setup VLAN interfaces
  79         add_vlan "$iface"
  80
  81         # Setup bridging
  82         case "$iftype" in
  83                 bridge)
  84                         ifconfig "$iface" up 2>/dev/null >/dev/null
  85                         ifconfig "br-$config" 2>/dev/null >/dev/null && {
  86                                 $DEBUG brctl addif "br-$config" "$iface"
  87                                 return 0
  88                         } || {
  89                                 $DEBUG brctl addbr "br-$config"
  90                                 $DEBUG brctl setfd "br-$config" 0
  91                                 $DEBUG brctl addif "br-$config" "$iface"
  92                                 iface="br-$config"
  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                         # prevent udhcpc from starting more than once
 124                         lock "/var/lock/dhcp-$iface"
 125                         pid="$(cat "$pidfile" 2>/dev/null)"
 126                         [ -d "/proc/$pid" ] && grep udhcpc "/proc/${pid}/cmdline" >/dev/null 2>/dev/null && {
 127                                 lock -u "/var/lock/dhcp-$iface"
 128                                 return 0
 129                         }
 130
 131                         config_get ipaddr "$config" ipaddr
 132                         config_get netmask "$config" netmask
 133                         config_get hostname "$config" hostname
 134                         config_get proto1 "$config" proto
 135
 136                         [ -z "$ipaddr" ] || \
 137                                 $DEBUG ifconfig "$iface" "$ipaddr" ${netmask:+netmask "$netmask"}
 138
 139                         # don't stay running in background if dhcp is not the main proto on the interface (e.g. when using pptp)
 140                         [ "$proto1" != "$proto" ] && dhcpopts="-n -q"
 141                         $DEBUG udhcpc -i "$iface" ${ipaddr:+-r $ipaddr} ${hostname:+-H $hostname} -b -p "$pidfile" ${dhcpopts:- -R &}
 142                         lock -u "/var/lock/dhcp-$iface"
 143                 ;;
 144                 *)
 145                         if ( eval "type setup_interface_$proto" ) >/dev/null 2>/dev/null; then
 146                                 eval "setup_interface_$proto '$iface' '$config' '$proto'"
 147                         else
 148                                 echo "Interface type $proto not supported."
 149                                 return 1
 150                         fi
 151                 ;;
 152         esac
 153 }
 154
 155 unbridge() {
 156         local dev="$1"
 157         local brdev
 158
 159         brctl show | grep "$dev" >/dev/null && {
 160                 # interface is still part of a bridge, correct that
 161
 162                 for brdev in $(brctl show | awk '$2 ~ /^[0-9].*\./ { print $1 }'); do
 163                         brctl delif "$brdev" "$dev" 2>/dev/null >/dev/null
 164                 done
 165         }
 166 }