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 cfgfile="$1"
  28         local mode iftype iface ifname device
  29         interfaces=
  30         config_cb() {
  31                 case "$1" in
  32                         interface)
  33                                 config_set "$2" auto 1
  34                         ;;
  35                 esac
  36                 config_get iftype "$CONFIG_SECTION" TYPE
  37                 case "$iftype" in
  38                         interface)
  39                                 config_get proto "$CONFIG_SECTION" proto
  40                                 append interfaces "$CONFIG_SECTION"
  41                                 config_get iftype "$CONFIG_SECTION" type
  42                                 config_get ifname "$CONFIG_SECTION" ifname
  43                                 config_get device "$CONFIG_SECTION" device
  44                                 config_set "$CONFIG_SECTION" device "${device:-$ifname}"
  45                                 case "$iftype" in
  46                                         bridge)
  47                                                 config_set "$CONFIG_SECTION" ifnames "${device:-$ifname}"
  48                                                 config_set "$CONFIG_SECTION" ifname br-"$CONFIG_SECTION"
  49                                         ;;
  50                                 esac
  51                                 ( type "scan_$proto" ) >/dev/null 2>/dev/null && eval "scan_$proto '$CONFIG_SECTION'"
  52                         ;;
  53                 esac
  54         }
  55         config_load "${cfgfile:-network}"
  56 }
  57
  58 add_vlan() {
  59         local vif="${1%\.*}"
  60
  61         [ "$1" = "$vif" ] || ifconfig "$1" >/dev/null 2>/dev/null || {
  62                 ifconfig "$vif" up 2>/dev/null >/dev/null || add_vlan "$vif"
  63                 $DEBUG vconfig add "$vif" "${1##*\.}"
  64         }
  65 }
  66
  67 # sort the device list, drop duplicates
  68 sort_list() {
  69         local arg="$*"
  70         (
  71                 for item in $arg; do
  72                         echo "$item"
  73                 done
  74         ) | sort -u
  75 }
  76
  77 # Create the interface, if necessary.
  78 # Return status 0 indicates that the setup_interface() call should continue
  79 # Return status 1 means that everything is set up already.
  80
  81 prepare_interface() {
  82         local iface="$1"
  83         local config="$2"
  84
  85         # if we're called for the bridge interface itself, don't bother trying
  86         # to create any interfaces here. The scripts have already done that, otherwise
  87         # the bridge interface wouldn't exist.
  88         [ "br-$config" = "$iface" -o -e "$iface" ] && return 0;
  89
  90         ifconfig "$iface" 2>/dev/null >/dev/null && {
  91                 # make sure the interface is removed from any existing bridge and brought down
  92                 ifconfig "$iface" down
  93                 unbridge "$iface"
  94         }
  95
  96         # Setup VLAN interfaces
  97         add_vlan "$iface"
  98         ifconfig "$iface" 2>/dev/null >/dev/null || return 0
  99
 100         # Setup bridging
 101         config_get iftype "$config" type
 102         config_get stp "$config" stp
 103         case "$iftype" in
 104                 bridge)
 105                         [ -x /usr/sbin/brctl ] && {
 106                                 ifconfig "br-$config" 2>/dev/null >/dev/null && {
 107                                         local newdevs=
 108
 109                                         config_get devices "$config" device
 110                                         for dev in $(sort_list "$devices" "$iface"); do
 111                                                 append newdevs "$dev"
 112                                         done
 113                                         uci_set_state network "$config" device "$newdevs"
 114                                         $DEBUG brctl addif "br-$config" "$iface"
 115                                         # Bridge existed already. No further processing necesary
 116                                 } || {
 117                                         $DEBUG brctl addbr "br-$config"
 118                                         $DEBUG brctl setfd "br-$config" 0
 119                                         $DEBUG ifconfig "br-$config" up
 120                                         $DEBUG brctl addif "br-$config" "$iface"
 121                                         $DEBUG brctl stp "br-$config" ${stp:-off}
 122                                         # Creating the bridge here will have triggered a hotplug event, which will
 123                                         # result in another setup_interface() call, so we simply stop processing
 124                                         # the current event at this point.
 125                                 }
 126                                 ifconfig "$iface" up 2>/dev/null >/dev/null
 127                                 return 1
 128                         }
 129                 ;;
 130         esac
 131         return 0
 132 }
 133
 134 set_interface_ifname() {
 135         local config="$1"
 136         local ifname="$2"
 137
 138         config_get device "$1" device
 139         uci_set_state network "$config" ifname "$ifname"
 140         uci_set_state network "$config" device "$device"
 141 }
 142
 143 setup_interface() {
 144         local iface="$1"
 145         local config="$2"
 146         local proto
 147         local macaddr
 148
 149         [ -n "$config" ] || {
 150                 config=$(find_config "$iface")
 151                 [ "$?" = 0 ] || return 1
 152         }
 153         proto="${3:-$(config_get "$config" proto)}"
 154
 155         prepare_interface "$iface" "$config" || return 0
 156
 157         [ "$iface" = "br-$config" ] && {
 158                 # need to bring up the bridge and wait a second for
 159                 # it to switch to the 'forwarding' state, otherwise
 160                 # it will lose its routes...
 161                 ifconfig "$iface" up
 162                 sleep 1
 163         }
 164
 165         # Interface settings
 166         config_get mtu "$config" mtu
 167         config_get macaddr "$config" macaddr
 168         grep "$iface:" /proc/net/dev > /dev/null && \
 169                 $DEBUG ifconfig "$iface" ${macaddr:+hw ether "$macaddr"} ${mtu:+mtu $mtu} up
 170         set_interface_ifname "$config" "$iface"
 171
 172         pidfile="/var/run/$iface.pid"
 173         case "$proto" in
 174                 static)
 175                         config_get ipaddr "$config" ipaddr
 176                         config_get netmask "$config" netmask
 177                         config_get ip6addr "$config" ip6addr
 178                         [ -z "$ipaddr" -o -z "$netmask" ] && [ -z "$ip6addr" ] && return 1
 179
 180                         config_get gateway "$config" gateway
 181                         config_get ip6gw "$config" ip6gw
 182                         config_get dns "$config" dns
 183                         config_get bcast "$config" broadcast
 184
 185                         [ -z "$ipaddr" ] || $DEBUG ifconfig "$iface" "$ipaddr" netmask "$netmask" broadcast "${bcast:-+}"
 186                         [ -z "$ip6addr" ] || $DEBUG ifconfig "$iface" add "$ip6addr"
 187                         [ -z "$gateway" ] || $DEBUG route add default gw "$gateway"
 188                         [ -z "$ip6gw" ] || $DEBUG route -A inet6 add default gw "$ip6gw"
 189                         [ -z "$dns" ] || {
 190                                 for ns in $dns; do
 191                                         grep "$ns" /tmp/resolv.conf.auto 2>/dev/null >/dev/null || {
 192                                                 echo "nameserver $ns" >> /tmp/resolv.conf.auto
 193                                         }
 194                                 done
 195                         }
 196
 197                         env -i ACTION="ifup" INTERFACE="$config" DEVICE="$iface" PROTO=static /sbin/hotplug-call "iface" &
 198                 ;;
 199                 dhcp)
 200                         # prevent udhcpc from starting more than once
 201                         lock "/var/lock/dhcp-$iface"
 202                         pid="$(cat "$pidfile" 2>/dev/null)"
 203                         [ -d "/proc/$pid" ] && grep udhcpc "/proc/${pid}/cmdline" >/dev/null 2>/dev/null && {
 204                                 lock -u "/var/lock/dhcp-$iface"
 205                                 return 0
 206                         }
 207
 208                         config_get ipaddr "$config" ipaddr
 209                         config_get netmask "$config" netmask
 210                         config_get hostname "$config" hostname
 211                         config_get proto1 "$config" proto
 212                         config_get clientid "$config" clientid
 213
 214                         [ -z "$ipaddr" ] || \
 215                                 $DEBUG ifconfig "$iface" "$ipaddr" ${netmask:+netmask "$netmask"}
 216
 217                         # don't stay running in background if dhcp is not the main proto on the interface (e.g. when using pptp)
 218                         [ ."$proto1" != ."$proto" ] && dhcpopts="-n -q"
 219                         $DEBUG eval udhcpc -t 0 -i "$iface" ${ipaddr:+-r $ipaddr} ${hostname:+-H $hostname} ${clientid:+-c $clientid} -b -p "$pidfile" ${dhcpopts:- -R &}
 220                         lock -u "/var/lock/dhcp-$iface"
 221                 ;;
 222                 *)
 223                         if ( eval "type setup_interface_$proto" ) >/dev/null 2>/dev/null; then
 224                                 eval "setup_interface_$proto '$iface' '$config' '$proto'"
 225                         else
 226                                 echo "Interface type $proto not supported."
 227                                 return 1
 228                         fi
 229                 ;;
 230         esac
 231 }
 232
 233 unbridge() {
 234         local dev="$1"
 235         local brdev
 236
 237         [ -x /usr/sbin/brctl ] || return 0
 238         brctl show | grep "$dev" >/dev/null && {
 239                 # interface is still part of a bridge, correct that
 240
 241                 for brdev in $(brctl show | awk '$2 ~ /^[0-9].*\./ { print $1 }'); do
 242                         brctl delif "$brdev" "$dev" 2>/dev/null >/dev/null
 243                 done
 244         }
 245 }