1. implemented network prefix load from config file

src/core/address.go

@@ -17,7 +17,7 @@ type Subnet [8]byte
 // The 8th bit of the last byte is used to signal nodes (0) or /64 prefixes (1).
 // Nodes that configure this differently will be unable to communicate with each other using IP packets, though routing and the DHT machinery *should* still work.
 func (c *Core) GetPrefix() [1]byte {
-	return [...]byte{0xfc}
+	return c.config.networkdomain.Prefix
 }
 
 // IsValid returns true if an address falls within the range used by nodes in the network.

src/core/options.go

@@ -14,6 +14,8 @@ func (c *Core) _applyOption(opt SetupOption) {
 		c.config.nodeinfo = v
 	case NodeInfoPrivacy:
 		c.config.nodeinfoPrivacy = v
+	case NetworkDomain:
+		c.config.networkdomain = v
 	case AllowedPublicKey:
 		pk := [32]byte{}
 		copy(pk[:], v)
@@ -41,4 +43,5 @@ func (a ListenAddress) isSetupOption()    {}
 func (a Peer) isSetupOption()             {}
 func (a NodeInfo) isSetupOption()         {}
 func (a NodeInfoPrivacy) isSetupOption()  {}
+func (a NetworkDomain) isSetupOption()    {}
 func (a AllowedPublicKey) isSetupOption() {}

src/tun/tun.go

@@ -91,9 +91,10 @@ func MaximumMTU() uint64 {
 
 // Init initialises the TUN module. You must have acquired a Listener from
 // the Mesh	 core before this point and it must not be in use elsewhere.
-func New(rwc *ipv6rwc.ReadWriteCloser, log core.Logger, opts ...SetupOption) (*TunAdapter, error) {
+func New(core *core.Core, log core.Logger, opts ...SetupOption) (*TunAdapter, error) {
 	tun := &TunAdapter{
-		rwc: rwc,
+		core: core,
+		rwc: ipv6rwc.NewReadWriteCloser(core),
 		log: log,
 	}
 	for _, opt := range opts {