ethernet ports: Add option to fake MAC addresses.

diff --git a/hooks/ports/ethernet b/hooks/ports/ethernet
index d74c2df5331d68ef5cead943a988cc7ca37bc9fd..327036cad75a63978584fd16729a4c022511a47c 100755 (executable)
--- a/hooks/ports/ethernet
+++ b/hooks/ports/ethernet
@@ -21,19 +21,26 @@
 
 . /usr/lib/network/header-port
 
-HOOK_SETTINGS="HOOK DEVICE_MAC"
+# DEVICE equals the actual MAC address of the device.
+# If ADDRESS is set, the device will get ADDRESS set for its MAC address.
+
+HOOK_SETTINGS="HOOK ADDRESS DEVICE"
 
 function _check() {
-       assert ismac DEVICE_MAC
+       assert ismac DEVICE
+
+       if isset ADDRESS; then
+               assert ismac ADDRESS
+       fi
 }
 
 function _create() {
        local port=${1}
-       shift
-
        assert isset port
+       shift
 
-       DEVICE_MAC=$(device_get_address ${port})
+       ADDRESS=""
+       DEVICE=$(device_get_address ${port})
 
        config_write $(port_file ${port}) ${HOOK_SETTINGS}
 
@@ -42,9 +49,17 @@ function _create() {
 
 function _up() {
        local port=${1}
-
        assert isset port
 
+       # Read in the confguration file.
+       port_config_read ${port}
+
+       # Check if the MAC address is the right one.
+       if isset ADDRESS; then
+               device_set_address "${device}" "${ADDRESS}"
+       fi
+
+       # Bring up the device.
        device_set_up ${port}
 
        exit ${EXIT_OK}
@@ -52,9 +67,9 @@ function _up() {
 
 function _down() {
        local port=${1}
-
        assert isset port
 
+       # Set down the device.
        device_set_down ${port}
 
        exit ${EXIT_OK}
@@ -62,15 +77,28 @@ function _down() {
 
 function _hotplug_rename() {
        local port=${1}
-       local device=${2}
-
        assert isset port
+
+       local device=${2}
        assert isset device
 
-       config_read $(port_file ${port})
+       # Read in the conifguration file.
+       port_config_read ${port}
+
+       # Get the current MAC address of the device.
+       local address=$(device_get_address ${device})
+       assert isset address
 
-       if [ "${DEVICE_MAC}" = "$(device_get_address ${device})" ]; then
+       # Check if the address matches with the configuration.
+       if list_match "${address}" ${DEVICE} ${ADDRESS}; then
                log DEBUG "Device '${device}' equals port '${port}'."
+
+               # Change the MAC address, if needed.
+               if isset ADDRESS; then
+                       device_set_address "${device}" "${ADDRESS}"
+               fi
+
+               # Everything is done.
                exit ${EXIT_OK}
        fi