package/base-files/files/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                 case "$1" in
  31                         interface)
  32                                 config_set "$2" auto 1
  33                         ;;
  34                 esac
  35                 config_get iftype "$CONFIG_SECTION" TYPE
  36                 case "$iftype" in
  37                         interface)
  38                                 config_get proto "$CONFIG_SECTION" proto
  39                                 append interfaces "$CONFIG_SECTION"
  40                                 config_get iftype "$CONFIG_SECTION" type
  41                                 config_get ifname "$CONFIG_SECTION" ifname
  42                                 config_set "$CONFIG_SECTION" device "$ifname"
  43                                 case "$iftype" in
  44                                         bridge)
  45                                                 config_set "$CONFIG_SECTION" ifnames "$ifname"
  46                                                 config_set "$CONFIG_SECTION" ifname br-"$CONFIG_SECTION"
  47                                         ;;
  48                                 esac
  49                                 ( type "scan_$proto" ) >/dev/null 2>/dev/null && eval "scan_$proto '$CONFIG_SECTION'"
  50                         ;;
  51                 esac
  52         }
  53         config_load network
  54 }
  55
  56 add_vlan() {
  57         local vif="${1%\.*}"
  58
  59         [ "$1" = "$vif" ] || ifconfig "$1" >/dev/null 2>/dev/null || {
  60                 ifconfig "$vif" up 2>/dev/null >/dev/null || add_vlan "$vif"
  61                 $DEBUG vconfig add "$vif" "${1##*\.}"
  62         }
  63 }
  64
  65 setup_interface() {
  66         local iface="$1"
  67         local config="$2"
  68         local proto
  69
  70         [ -n "$config" ] || {
  71                 config=$(find_config "$iface")
  72                 [ "$?" = 0 ] || return 1
  73         }
  74
  75         proto="${3:-$(config_get "$config" proto)}"
  76         config_get iftype "$config" type
  77
  78         ifconfig "$iface" 2>/dev/null >/dev/null && {
  79                 # make sure the interface is removed from any existing bridge
  80                 unbridge "$iface"
  81         }
  82
  83         # Setup VLAN interfaces
  84         add_vlan "$iface"
  85
  86         # Setup bridging
  87         case "$iftype" in
  88                 bridge)
  89                         ifconfig "$iface" up 2>/dev/null >/dev/null
  90                         ifconfig "br-$config" 2>/dev/null >/dev/null && {
  91                                 $DEBUG brctl addif "br-$config" "$iface"
  92                                 return 0
  93                         } || {
  94                                 $DEBUG brctl addbr "br-$config"
  95                                 $DEBUG brctl setfd "br-$config" 0
  96                                 $DEBUG brctl addif "br-$config" "$iface"
  97                                 iface="br-$config"
  98                         }
  99                 ;;
 100         esac
 101
 102         # Interface settings
 103         config_get mtu "$config" mtu
 104         $DEBUG ifconfig "$iface" ${mtu:+mtu $mtu} up
 105
 106         pidfile="/var/run/$iface.pid"
 107         case "$proto" in
 108                 static)
 109                         config_get ipaddr "$config" ipaddr
 110                         config_get netmask "$config" netmask
 111                         [ -z "$ipaddr" -o -z "$netmask" ] && return 1
 112
 113                         config_get ip6addr "$config" ip6addr
 114                         config_get gateway "$config" gateway
 115                         config_get dns "$config" dns
 116
 117                         $DEBUG ifconfig "$iface" "$ipaddr" netmask "$netmask"
 118                         [ -z "$gateway" ] || route add default gw "$gateway"
 119                         [ -z "$dns" -o -f /tmp/resolv.conf ] || {
 120                                 for ns in $dns; do
 121                                         echo "nameserver $ns" >> /tmp/resolv.conf
 122                                 done
 123                         }
 124
 125                         env -i ACTION="ifup" INTERFACE="$config" DEVICE="$iface" PROTO=static /sbin/hotplug "iface" &
 126                 ;;
 127                 dhcp)
 128                         # prevent udhcpc from starting more than once
 129                         lock "/var/lock/dhcp-$iface"
 130                         pid="$(cat "$pidfile" 2>/dev/null)"
 131                         [ -d "/proc/$pid" ] && grep udhcpc "/proc/${pid}/cmdline" >/dev/null 2>/dev/null && {
 132                                 lock -u "/var/lock/dhcp-$iface"
 133                                 return 0
 134                         }
 135
 136                         config_get ipaddr "$config" ipaddr
 137                         config_get netmask "$config" netmask
 138                         config_get hostname "$config" hostname
 139                         config_get proto1 "$config" proto
 140
 141                         [ -z "$ipaddr" ] || \
 142                                 $DEBUG ifconfig "$iface" "$ipaddr" ${netmask:+netmask "$netmask"}
 143
 144                         # don't stay running in background if dhcp is not the main proto on the interface (e.g. when using pptp)
 145                         [ "$proto1" != "$proto" ] && dhcpopts="-n -q"
 146                         $DEBUG eval udhcpc -t 0 -i "$iface" ${ipaddr:+-r $ipaddr} ${hostname:+-H $hostname} -b -p "$pidfile" ${dhcpopts:- -R &}
 147                         lock -u "/var/lock/dhcp-$iface"
 148                 ;;
 149                 *)
 150                         if ( eval "type setup_interface_$proto" ) >/dev/null 2>/dev/null; then
 151                                 eval "setup_interface_$proto '$iface' '$config' '$proto'"
 152                         else
 153                                 echo "Interface type $proto not supported."
 154                                 return 1
 155                         fi
 156                 ;;
 157         esac
 158 }
 159
 160 unbridge() {
 161         local dev="$1"
 162         local brdev
 163
 164         brctl show | grep "$dev" >/dev/null && {
 165                 # interface is still part of a bridge, correct that
 166
 167                 for brdev in $(brctl show | awk '$2 ~ /^[0-9].*\./ { print $1 }'); do
 168                         brctl delif "$brdev" "$dev" 2>/dev/null >/dev/null
 169                 done
 170         }
 171 }