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Tweaks
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@ -29,7 +29,7 @@ type Core = yggdrasil.Core
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type node struct {
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core Core
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tun tuntap.TunAdapter
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tuntap tuntap.TunAdapter
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multicast multicast.Multicast
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}
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@ -251,13 +251,14 @@ func main() {
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// Now that we have a working configuration, we can now actually start
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// Yggdrasil. This will start the router, switch, DHT node, TCP and UDP
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// sockets, TUN/TAP adapter and multicast discovery port.
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n.core.SetRouterAdapter(&n.tun)
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if err := n.core.Start(cfg, logger); err != nil {
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n.core.SetRouterAdapter(&n.tuntap)
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state, err := n.core.Start(cfg, logger)
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if err != nil {
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logger.Errorln("An error occurred during startup")
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panic(err)
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}
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// Start the multicast interface
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n.multicast.Init(&n.core, cfg, logger)
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n.multicast.Init(&n.core, state, logger, nil)
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if err := n.multicast.Start(); err != nil {
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logger.Errorln("An error occurred starting multicast:", err)
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}
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@ -16,7 +16,7 @@ import (
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type Multicast struct {
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core *yggdrasil.Core
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config *config.NodeConfig
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config *config.NodeState
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log *log.Logger
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reconfigure chan chan error
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sock *ipv6.PacketConn
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@ -25,13 +25,13 @@ type Multicast struct {
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listenPort uint16
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}
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func (m *Multicast) Init(core *yggdrasil.Core, config *config.NodeConfig, log *log.Logger) {
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func (m *Multicast) Init(core *yggdrasil.Core, state *config.NodeState, log *log.Logger, options interface{}) error {
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m.core = core
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m.config = config
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m.config = state
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m.log = log
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m.reconfigure = make(chan chan error, 1)
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m.listeners = make(map[string]*yggdrasil.TcpListener)
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current := m.config //.Get()
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current, _ := m.config.Get()
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m.listenPort = current.LinkLocalTCPPort
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go func() {
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for {
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@ -44,6 +44,7 @@ func (m *Multicast) Init(core *yggdrasil.Core, config *config.NodeConfig, log *l
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if count := len(m.interfaces()); count != 0 {
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m.log.Infoln("Found", count, "multicast interface(s)")
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}
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return nil
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}
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func (m *Multicast) Start() error {
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@ -75,10 +76,13 @@ func (m *Multicast) Start() error {
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return nil
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}
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func (m *Multicast) Stop() error {
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return nil
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}
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func (m *Multicast) interfaces() map[string]net.Interface {
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// Get interface expressions from config
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//current, _ := m.config.Get()
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current := m.config
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current, _ := m.config.Get()
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exprs := current.MulticastInterfaces
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// Ask the system for network interfaces
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interfaces := make(map[string]net.Interface)
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@ -197,7 +201,6 @@ func (m *Multicast) announce() {
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if l, ok := m.listeners[iface.Name]; !ok || l.Listener == nil {
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// No listener was found - let's create one
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listenaddr := fmt.Sprintf("[%s%%%s]:%d", addrIP, iface.Name, m.listenPort)
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//if li, err := m.core.link.tcp.listen(listenaddr); err == nil {
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if li, err := m.core.ListenTCP(listenaddr); err == nil {
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m.log.Debugln("Started multicasting on", iface.Name)
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// Store the listener so that we can stop it later if needed
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@ -261,7 +264,6 @@ func (m *Multicast) listen() {
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continue
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}
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addr.Zone = ""
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//if err := m.core.link.call("tcp://"+addr.String(), from.Zone); err != nil {
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if err := m.core.CallPeer("tcp://"+addr.String(), from.Zone); err != nil {
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m.log.Debugln("Call from multicast failed:", err)
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}
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@ -17,11 +17,6 @@ import (
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var buildName string
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var buildVersion string
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type module interface {
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init(*Core, *config.NodeConfig) error
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start() error
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}
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// The Core object represents the Yggdrasil node. You should create a Core
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// object for each Yggdrasil node you plan to run.
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type Core struct {
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@ -173,14 +168,14 @@ func GetBuildVersion() string {
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// Set the router adapter
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func (c *Core) SetRouterAdapter(adapter adapterImplementation) {
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c.router.tun = adapter
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c.router.adapter = adapter
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}
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// Starts up Yggdrasil using the provided NodeState, and outputs debug logging
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// through the provided log.Logger. The started stack will include TCP and UDP
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// sockets, a multicast discovery socket, an admin socket, router, switch and
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// DHT node.
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func (c *Core) Start(nc *config.NodeConfig, log *log.Logger) error {
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func (c *Core) Start(nc *config.NodeConfig, log *log.Logger) (*config.NodeState, error) {
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c.log = log
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c.config = config.NodeState{
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@ -201,7 +196,7 @@ func (c *Core) Start(nc *config.NodeConfig, log *log.Logger) error {
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if err := c.link.init(c); err != nil {
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c.log.Errorln("Failed to start link interfaces")
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return err
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return nil, err
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}
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c.config.Mutex.RLock()
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@ -212,34 +207,34 @@ func (c *Core) Start(nc *config.NodeConfig, log *log.Logger) error {
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if err := c.switchTable.start(); err != nil {
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c.log.Errorln("Failed to start switch")
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return err
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return nil, err
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}
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if err := c.router.start(); err != nil {
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c.log.Errorln("Failed to start router")
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return err
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return nil, err
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}
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if err := c.admin.start(); err != nil {
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c.log.Errorln("Failed to start admin socket")
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return err
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return nil, err
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}
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if err := c.router.tun.Start(c.router.addr, c.router.subnet); err != nil {
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if err := c.router.adapter.Start(c.router.addr, c.router.subnet); err != nil {
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c.log.Errorln("Failed to start TUN/TAP")
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return err
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return nil, err
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}
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go c.addPeerLoop()
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c.log.Infoln("Startup complete")
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return nil
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return &c.config, nil
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}
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// Stops the Yggdrasil node.
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func (c *Core) Stop() {
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c.log.Infoln("Stopping...")
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c.router.tun.Close()
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c.router.adapter.Close()
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c.admin.close()
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}
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@ -283,6 +278,12 @@ func (c *Core) GetSubnet() *net.IPNet {
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return &net.IPNet{IP: subnet, Mask: net.CIDRMask(64, 128)}
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}
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// GetRouterAddresses returns the raw address and subnet types as used by the
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// router
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func (c *Core) GetRouterAddresses() (address.Address, address.Subnet) {
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return c.router.addr, c.router.subnet
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}
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// Gets the nodeinfo.
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func (c *Core) GetNodeInfo() nodeinfoPayload {
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return c.router.nodeinfo.getNodeInfo()
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@ -350,11 +351,11 @@ func (c *Core) GetTUNDefaultIfTAPMode() bool {
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// Gets the current TUN/TAP interface name.
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func (c *Core) GetTUNIfName() string {
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//return c.router.tun.iface.Name()
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return c.router.tun.Name()
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return c.router.adapter.Name()
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}
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// Gets the current TUN/TAP interface MTU.
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func (c *Core) GetTUNIfMTU() int {
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//return c.router.tun.mtu
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return c.router.tun.MTU()
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return c.router.adapter.MTU()
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}
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@ -5,7 +5,7 @@ package yggdrasil
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// TODO clean up old/unused code, maybe improve comments on whatever is left
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// Send:
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// Receive a packet from the tun
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// Receive a packet from the adapter
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// Look up session (if none exists, trigger a search)
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// Hand off to session (which encrypts, etc)
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// Session will pass it back to router.out, which hands it off to the self peer
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@ -20,7 +20,7 @@ package yggdrasil
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// If it's dht/seach/etc. traffic, the router passes it to that part
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// If it's an encapsulated IPv6 packet, the router looks up the session for it
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// The packet is passed to the session, which decrypts it, router.recvPacket
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// The router then runs some sanity checks before passing it to the tun
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// The router then runs some sanity checks before passing it to the adapter
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import (
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"bytes"
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@ -31,7 +31,7 @@ import (
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"github.com/yggdrasil-network/yggdrasil-go/src/util"
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)
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// The router struct has channels to/from the tun/tap device and a self peer (0), which is how messages are passed between this node and the peers/switch layer.
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// The router struct has channels to/from the adapter device and a self peer (0), which is how messages are passed between this node and the peers/switch layer.
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// The router's mainLoop goroutine is responsible for managing all information related to the dht, searches, and crypto sessions.
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type router struct {
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core *Core
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@ -41,17 +41,17 @@ type router struct {
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in <-chan []byte // packets we received from the network, link to peer's "out"
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out func([]byte) // packets we're sending to the network, link to peer's "in"
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toRecv chan router_recvPacket // packets to handle via recvPacket()
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tun adapterImplementation // TUN/TAP adapter
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recv chan<- []byte // place where the tun pulls received packets from
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send <-chan []byte // place where the tun puts outgoing packets
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reject chan<- RejectedPacket // place where we send error packets back to tun
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adapter adapterImplementation // TUN/TAP adapter
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recv chan<- []byte // place where the adapter pulls received packets from
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send <-chan []byte // place where the adapter puts outgoing packets
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reject chan<- RejectedPacket // place where we send error packets back to adapter
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reset chan struct{} // signal that coords changed (re-init sessions/dht)
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admin chan func() // pass a lambda for the admin socket to query stuff
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cryptokey cryptokey
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nodeinfo nodeinfo
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}
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// Packet and session info, used to check that the packet matches a valid IP range or CKR prefix before sending to the tun.
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// Packet and session info, used to check that the packet matches a valid IP range or CKR prefix before sending to the adapter.
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type router_recvPacket struct {
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bs []byte
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sinfo *sessionInfo
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@ -70,7 +70,7 @@ type RejectedPacket struct {
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Detail interface{}
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}
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// Initializes the router struct, which includes setting up channels to/from the tun/tap.
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// Initializes the router struct, which includes setting up channels to/from the adapter.
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func (r *router) init(core *Core) {
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r.core = core
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r.reconfigure = make(chan chan error, 1)
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@ -128,7 +128,7 @@ func (r *router) init(core *Core) {
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r.nodeinfo.setNodeInfo(r.core.config.Current.NodeInfo, r.core.config.Current.NodeInfoPrivacy)
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r.core.config.Mutex.RUnlock()
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r.cryptokey.init(r.core)
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r.tun.Init(&r.core.config, r.core.log, send, recv, reject)
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r.adapter.Init(&r.core.config, r.core.log, send, recv, reject)
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}
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// Starts the mainLoop goroutine.
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@ -138,7 +138,7 @@ func (r *router) start() error {
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return nil
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}
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// Takes traffic from the tun/tap and passes it to router.send, or from r.in and handles incoming traffic.
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// Takes traffic from the adapter and passes it to router.send, or from r.in and handles incoming traffic.
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// Also adds new peer info to the DHT.
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// Also resets the DHT and sesssions in the event of a coord change.
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// Also does periodic maintenance stuff.
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@ -179,7 +179,7 @@ func (r *router) mainLoop() {
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// If a session to the destination exists, gets the session and passes the packet to it.
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// If no session exists, it triggers (or continues) a search.
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// If the session hasn't responded recently, it triggers a ping or search to keep things alive or deal with broken coords *relatively* quickly.
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// It also deals with oversized packets if there are MTU issues by calling into icmpv6.go to spoof PacketTooBig traffic, or DestinationUnreachable if the other side has their tun/tap disabled.
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// It also deals with oversized packets if there are MTU issues by calling into icmpv6.go to spoof PacketTooBig traffic, or DestinationUnreachable if the other side has their adapter disabled.
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func (r *router) sendPacket(bs []byte) {
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var sourceAddr address.Address
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var destAddr address.Address
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@ -339,7 +339,7 @@ func (r *router) sendPacket(bs []byte) {
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}
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// Called for incoming traffic by the session worker for that connection.
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// Checks that the IP address is correct (matches the session) and passes the packet to the tun/tap.
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// Checks that the IP address is correct (matches the session) and passes the packet to the adapter.
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func (r *router) recvPacket(bs []byte, sinfo *sessionInfo) {
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// Note: called directly by the session worker, not the router goroutine
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if len(bs) < 24 {
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@ -402,7 +402,7 @@ func (r *router) handleIn(packet []byte) {
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}
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// Handles incoming traffic, i.e. encapuslated ordinary IPv6 packets.
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// Passes them to the crypto session worker to be decrypted and sent to the tun/tap.
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// Passes them to the crypto session worker to be decrypted and sent to the adapter.
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func (r *router) handleTraffic(packet []byte) {
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defer util.PutBytes(packet)
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p := wire_trafficPacket{}
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@ -436,7 +436,7 @@ func (r *router) handleProto(packet []byte) {
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return
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}
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// Now do something with the bytes in bs...
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// send dht messages to dht, sessionRefresh to sessions, data to tun...
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// send dht messages to dht, sessionRefresh to sessions, data to adapter...
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// For data, should check that key and IP match...
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bsType, bsTypeLen := wire_decode_uint64(bs)
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if bsTypeLen == 0 {
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@ -277,7 +277,7 @@ func (ss *sessions) createSession(theirPermKey *crypto.BoxPubKey) *sessionInfo {
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sinfo.mySesPriv = *priv
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sinfo.myNonce = *crypto.NewBoxNonce()
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sinfo.theirMTU = 1280
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sinfo.myMTU = uint16(ss.core.router.tun.MTU())
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sinfo.myMTU = uint16(ss.core.router.adapter.MTU())
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now := time.Now()
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sinfo.time = now
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sinfo.mtuTime = now
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