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, 0 deletions

diff --git a/device.h b/device.h
index f398dbc..07f1dbd 100644
--- a/device.h
+++ b/device.h
@@ -244,6 +244,7 @@ int device_type_add(struct device_type *devtype);
 struct device_type *device_type_get(const char *tname);
 struct device *device_create(const char *name, struct device_type *type,
 			     struct blob_attr *config);
+void device_merge_settings(struct device *dev, struct device_settings *n);
 void device_init_settings(struct device *dev, struct blob_attr **tb);
 void device_init_pending(void);