Add basic support as a DHCP client.

[people/stevee/network.git] / dhclient-script

diff --git a/dhclient-script b/dhclient-script
new file mode 100644 (file)
index 0000000..e56c096
--- /dev/null
+++ b/dhclient-script
@@ -0,0 +1,122 @@
+#!/bin/bash
+
+. /usr/lib/network/functions
+
+# Configure logging
+LOG_FACILITY="dhclient-script"
+
+assert isset interface
+assert isset reason
+
+assert device_exists ${interface}
+
+# XXX LOAD ZONE CONFIGURATION
+
+basename="$(basename $0)"
+log DEBUG "${basename} called for interface=${interface} reason=${reason}"
+
+# Main pitchfork.
+case "${reason}" in
+       MEDIUM)
+               # Linux does not handle MEDIUM.
+               exit 0
+               ;;
+
+       PREINIT)
+               # Bring up the device if it hasn't been done before.
+               if ! device_is_up ${interface}; then
+                       log DEBUG "The interface '${interface}' does not appear to be up."
+
+                       zone_up ${interface}
+               fi
+
+               # If the use configured a delay, we will honour that.
+               if [ -n "${DELAY}"  ]; then
+                       assert isinteger DELAY
+                       sleep ${DELAY}
+
+               # If he didn't, we will try to detect is STP has brought the
+               # bridge up.
+               elif device_is_bridge ${interface}; then
+                       counter=60
+
+                       while [ ${counter} -gt 0 ]; do
+                               # We may end this, when the bridge is in forwarding mode.
+                               if bridge_is_forwarding ${interface}; then
+                                       log DEBUG "Bridge '${interface}' is in forwarding mode."
+                                       break
+                               fi
+
+                               counter=$(( ${counter} - 1 ))
+                               sleep 1
+                       done
+
+                       # Tell the daemon, that we are not ready to go on.
+                       if [ ${counter} -eq 0 ]; then
+                               log ERROR "Bridge '${interface}' is not in forwarding mode."
+                               log ERROR "Could not go on with getting a DHCP lease. Exiting."
+
+                               exit 1
+                       fi
+               fi
+
+               exit 0
+               ;;
+
+
+       BOUND|RENEW|REBIND|REBOOT)
+               # Check if the IP address has changed. If so, delete all routes and stuff.
+               if [ -n "${old_ip_address}" -a "${old_ip_address}" != "${new_ip_address}" ]; then
+                       ipv4_flush_device ${interface}
+               fi
+
+               case "${reason}" in
+                       BOUND|REBOOT)
+                               if [ ! "${old_ip_address}" = "${new_ip_address}" ] || \
+                                       [ ! "${old_subnet_mask}" = "${new_subnet_mask}" ] || \
+                                       [ ! "${old_network_number}" = "${new_network_number}" ] || \
+                                       [ ! "${old_broadcast_address}" = "${new_broadcast_address}" ] || \
+                                       [ ! "${old_routers}" = "${new_routers}" ] || \
+                                       [ ! "${old_interface_mtu}" = "${new_interface_mtu}" ]; then
+
+
+                                       # Calc a prefix out of address and subnet mask.
+                                       new_prefix="$(ipv4_get_prefix ${new_ip_address} ${new_subnet_mask})"
+
+                                       # Set the new ip address.
+                                       ip_address_add ${interface} ${new_ip_address}/${new_prefix}
+                                       device_set_up ${interface}
+
+
+                                       # A MTU of 576 is used for X.25 and dialup connections. Some broken DHCP
+                                       # servers send out an MTU of 576 bytes, which will be ignored.
+                                       if [ -n "${new_interface_mtu}" ] && [ ${new_interface_mtu} -gt 576 ]; then
+                                               device_set_mtu ${interface} ${new_interface_mtu}
+                                       fi
+
+                                       # Save configuration
+                                       routing_db_set ${interface} ipv4 type "ipv4-dhcp"
+                                       routing_db_set ${interface} ipv4 local-ip-address "${new_ip_address}/${new_prefix}"
+                                       routing_db_set ${interface} ipv4 remote-ip-address "${new_router}"
+                                       routing_db_set ${interface} ipv4 active 1
+
+                                       # Update the routing tables.
+                                       routing_update ${interface} ipv4
+                               fi
+                               ;;
+               esac
+
+               exit 0
+               ;;
+
+       EXPIRE|FAIL|RELEASE|STOP)
+               # Remove the currently configured addresses from the device.
+               if [ -n "${old_ip_address}" ]; then
+                       ipv4_flush_device ${interface}
+               fi
+
+               exit 0
+               ;;
+esac
+
+exit 1