interface-ip: harden eui64 IPv6 prefix address generation

Check if a mac address is actually present when generating an eui64 based
IPv6 address; in case of failure bail out.
At the same time make sure the active mac address is used as input for the
eui64 based IPv6 address and guarantee IPv6 prefix address generation is
based on the actual config by resetting the IPv6 prefix address in the
assignment structure when it gets deleted.

Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/device.c b/device.c
index 0424658..a851037 100644
--- a/device.c
+++ b/device.c
@@ -193,7 +193,7 @@ struct device_type simple_device_type = {
 	.free = simple_device_free,
 };
 
-static void
+void
 device_merge_settings(struct device *dev, struct device_settings *n)
 {
 	struct device_settings *os = &dev->orig_settings;