// checkShortIDs verifies that the configuration won't result in duplicate
// short ID:s; that is, that the devices in the cluster all have unique
// initial 64 bits.
func checkShortIDs(cfg *config.Wrapper) error {
exists := make(map[uint64]protocol.DeviceID)
for deviceID := range cfg.Devices() {
shortID := deviceID.Short()
if otherID, ok := exists[shortID]; ok {
return fmt.Errorf("%v in conflict with %v", deviceID, otherID)
}
exists[shortID] = deviceID
}
return nil
}
