apparmor: add yggdrasilctl policy (#1235)

as it is long gone from the daemon code
and unexpectedly kills the daemon

.github/workflows/ci.yml

@@ -15,12 +15,12 @@ jobs:
     name: Lint
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/setup-go@v3
+      - uses: actions/setup-go@v5
         with:
-          go-version: 1.19
+          go-version: stable
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: golangci-lint
-        uses: golangci/golangci-lint-action@v3
+        uses: golangci/golangci-lint-action@v6
         with:
           args: --issues-exit-code=1
 
@@ -34,7 +34,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Initialize CodeQL
         uses: github/codeql-action/init@v2
@@ -51,17 +51,17 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        goversion: ["1.17", "1.18", "1.19"]
+        goversion: ["1.22", "1.23", "1.24"]
 
     name: Build & Test (Linux, Go ${{ matrix.goversion }})
     needs: [lint]
 
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Set up Go
-        uses: actions/setup-go@v3
+        uses: actions/setup-go@v5
         with:
           go-version: ${{ matrix.goversion }}
 
@@ -75,17 +75,17 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        goversion: ["1.17", "1.18", "1.19"]
+        goversion: ["1.22", "1.23", "1.24"]
 
     name: Build & Test (Windows, Go ${{ matrix.goversion }})
     needs: [lint]
 
     runs-on: windows-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Set up Go
-        uses: actions/setup-go@v3
+        uses: actions/setup-go@v5
         with:
           go-version: ${{ matrix.goversion }}
 
@@ -99,17 +99,17 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        goversion: ["1.17", "1.18", "1.19"]
+        goversion: ["1.22", "1.23", "1.24"]
 
     name: Build & Test (macOS, Go ${{ matrix.goversion }})
     needs: [lint]
 
     runs-on: macos-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Set up Go
-        uses: actions/setup-go@v3
+        uses: actions/setup-go@v5
         with:
           go-version: ${{ matrix.goversion }}
 
@@ -119,6 +119,32 @@ jobs:
       - name: Unit tests
         run: go test -v ./...
 
+  build-freebsd:
+    strategy:
+      fail-fast: false
+      matrix:
+        goversion: ["1.22", "1.23", "1.24"]
+        goos:
+          - freebsd
+          - openbsd
+
+    name: Build (Cross ${{ matrix.goos }}, Go ${{ matrix.goversion }})
+    needs: [lint]
+
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: ${{ matrix.goversion }}
+
+      - name: Build Yggdrasil
+        run: go build -v ./...
+        env:
+          GOOS: ${{ matrix.goos }}
+
   tests-ok:
     name: All tests passed
     needs: [lint, codeql, build-linux, build-windows, build-macos]

.github/workflows/pkg.yml

@@ -16,16 +16,16 @@ jobs:
 
     name: Package (Debian, ${{ matrix.pkgarch }})
 
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0
 
       - name: Set up Go
-        uses: actions/setup-go@v3
+        uses: actions/setup-go@v5
         with:
-          go-version: 1.19
+          go-version: "stable"
 
       - name: Build package
         env:
@@ -33,7 +33,7 @@ jobs:
         run: sh contrib/deb/generate.sh
 
       - name: Upload artifacts
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: Debian package (${{ matrix.pkgarch }})
           path: "*.deb"
@@ -49,14 +49,14 @@ jobs:
 
     runs-on: macos-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0
 
       - name: Set up Go
-        uses: actions/setup-go@v3
+        uses: actions/setup-go@v5
         with:
-          go-version: 1.19
+          go-version: "stable"
 
       - name: Build package
         env:
@@ -64,7 +64,7 @@ jobs:
         run: sh contrib/macos/create-pkg.sh
 
       - name: Upload artifacts
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: macOS package (${{ matrix.pkgarch }})
           path: "*.pkg"
@@ -80,20 +80,23 @@ jobs:
 
     runs-on: windows-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0
 
       - name: Set up Go
-        uses: actions/setup-go@v3
+        uses: actions/setup-go@v5
         with:
-          go-version: 1.19
+          go-version: "stable"
+
+      - name: Setup .NET Core SDK
+        uses: actions/setup-dotnet@v4
 
       - name: Build package
         run: sh contrib/msi/build-msi.sh ${{ matrix.pkgarch }}
 
       - name: Upload artifacts
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: Windows package (${{ matrix.pkgarch }})
           path: "*.msi"
@@ -107,22 +110,22 @@ jobs:
 
     name: Package (Router, ${{ matrix.pkgarch }})
 
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0
           path: yggdrasil
 
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           repository: neilalexander/vyatta-yggdrasil
           path: vyatta-yggdrasil
 
       - name: Set up Go
-        uses: actions/setup-go@v3
+        uses: actions/setup-go@v5
         with:
-          go-version: 1.19
+          go-version: "stable"
 
       - name: Build package
         env:
@@ -130,7 +133,7 @@ jobs:
         run: cd /home/runner/work/yggdrasil-go/yggdrasil-go/vyatta-yggdrasil && ./build-${{ matrix.pkgarch }}
 
       - name: Upload artifacts
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: Router package (${{ matrix.pkgarch }})
           path: "/home/runner/work/yggdrasil-go/yggdrasil-go/vyatta-yggdrasil/*.deb"

.golangci.yml

@@ -2,7 +2,8 @@ run:
   build-tags:
     - lint
   issues-exit-code: 0 # TODO: change this to 1 when we want it to fail builds
-  skip-dirs:
+issues:
+  exclude-dirs:
     - contrib/
     - misc/
 linters:

README.md

@@ -24,7 +24,7 @@ or tools in the `contrib` folder.
 If you want to build from source, as opposed to installing one of the pre-built
 packages:
 
-1. Install [Go](https://golang.org) (requires Go 1.17 or later)
+1. Install [Go](https://golang.org) (requires Go 1.22 or later)
 2. Clone this repository
 2. Run `./build`
 

cmd/genkeys/main.go

@@ -1,5 +1,4 @@
 /*
-
 This file generates crypto keys.
 It prints out a new set of keys each time if finds a "better" one.
 By default, "better" means a higher NodeID (-> higher IP address).
@@ -8,7 +7,6 @@ This is because the IP address format can compress leading 1s in the address, to
 If run with the "-sig" flag, it generates signing keys instead.
 A "better" signing key means one with a higher TreeID.
 This only matters if it's high enough to make you the root of the tree.
-
 */
 package main
 
@@ -18,6 +16,9 @@ import (
 	"fmt"
 	"net"
 	"runtime"
+	"time"
+
+	"suah.dev/protect"
 
 	"github.com/yggdrasil-network/yggdrasil-go/src/address"
 )
@@ -25,10 +26,19 @@ import (
 type keySet struct {
 	priv ed25519.PrivateKey
 	pub  ed25519.PublicKey
+	count uint64
 }
 
 func main() {
+	if err := protect.Pledge("stdio"); err != nil {
+		panic(err)
+	}
+
 	threads := runtime.GOMAXPROCS(0)
+	fmt.Println("Threads:", threads)
+	start := time.Now()
+	var totalKeys uint64
+	totalKeys = 0
 	var currentBest ed25519.PublicKey
 	newKeys := make(chan keySet, threads)
 	for i := 0; i < threads; i++ {
@@ -37,8 +47,9 @@ func main() {
 	for {
 		newKey := <-newKeys
 		if isBetter(currentBest, newKey.pub) || len(currentBest) == 0 {
+			totalKeys += newKey.count
 			currentBest = newKey.pub
-			fmt.Println("-----")
+			fmt.Println("-----", time.Since(start), "---", totalKeys, "keys tried")
 			fmt.Println("Priv:", hex.EncodeToString(newKey.priv))
 			fmt.Println("Pub:", hex.EncodeToString(newKey.pub))
 			addr := address.AddrForKey(newKey.pub)
@@ -61,11 +72,14 @@ func isBetter(oldPub, newPub ed25519.PublicKey) bool {
 
 func doKeys(out chan<- keySet) {
 	bestKey := make(ed25519.PublicKey, ed25519.PublicKeySize)
+	var count uint64
+	count = 0
 	for idx := range bestKey {
 		bestKey[idx] = 0xff
 	}
 	for {
 		pub, priv, err := ed25519.GenerateKey(nil)
+		count++
 		if err != nil {
 			panic(err)
 		}
@@ -73,6 +87,7 @@ func doKeys(out chan<- keySet) {
 			continue
 		}
 		bestKey = pub
-		out <- keySet{priv, pub}
+		out <- keySet{priv, pub, count}
+		count = 0
 	}
 }

cmd/yggdrasil/chuser_other.go

@@ -0,0 +1,10 @@
+//go:build !aix && !darwin && !dragonfly && !freebsd && !linux && !netbsd && !openbsd && !solaris
+// +build !aix,!darwin,!dragonfly,!freebsd,!linux,!netbsd,!openbsd,!solaris
+
+package main
+
+import "errors"
+
+func chuser(user string) error {
+	return errors.New("setting uid/gid is not supported on this platform")
+}

cmd/yggdrasil/chuser_unix.go

@@ -0,0 +1,63 @@
+//go:build aix || darwin || dragonfly || freebsd || linux || netbsd || openbsd || solaris
+// +build aix darwin dragonfly freebsd linux netbsd openbsd solaris
+
+package main
+
+import (
+	"fmt"
+	"os/user"
+	"strconv"
+	"strings"
+
+	"golang.org/x/sys/unix"
+)
+
+func chuser(input string) error {
+	givenUser, givenGroup, _ := strings.Cut(input, ":")
+	if givenUser == "" {
+		return fmt.Errorf("user is empty")
+	}
+	if strings.Contains(input, ":") && givenGroup == "" {
+		return fmt.Errorf("group is empty")
+	}
+
+	var (
+		err      error
+		usr      *user.User
+		grp      *user.Group
+		uid, gid int
+	)
+
+	if usr, err = user.LookupId(givenUser); err != nil {
+		if usr, err = user.Lookup(givenUser); err != nil {
+			return err
+		}
+	}
+	if uid, err = strconv.Atoi(usr.Uid); err != nil {
+		return err
+	}
+
+	if givenGroup != "" {
+		if grp, err = user.LookupGroupId(givenGroup); err != nil {
+			if grp, err = user.LookupGroup(givenGroup); err != nil {
+				return err
+			}
+		}
+
+		gid, _ = strconv.Atoi(grp.Gid)
+	} else {
+		gid, _ = strconv.Atoi(usr.Gid)
+	}
+
+	if err := unix.Setgroups([]int{gid}); err != nil {
+		return fmt.Errorf("setgroups: %d: %v", gid, err)
+	}
+	if err := unix.Setgid(gid); err != nil {
+		return fmt.Errorf("setgid: %d: %v", gid, err)
+	}
+	if err := unix.Setuid(uid); err != nil {
+		return fmt.Errorf("setuid: %d: %v", uid, err)
+	}
+
+	return nil
+}

cmd/yggdrasil/chuser_unix_test.go

@@ -0,0 +1,80 @@
+//go:build aix || darwin || dragonfly || freebsd || linux || netbsd || openbsd || solaris
+// +build aix darwin dragonfly freebsd linux netbsd openbsd solaris
+
+package main
+
+import (
+	"os/user"
+	"testing"
+)
+
+// Usernames must not contain a number sign.
+func TestEmptyString(t *testing.T) {
+	if chuser("") == nil {
+		t.Fatal("the empty string is not a valid user")
+	}
+}
+
+// Either omit delimiter and group, or omit both.
+func TestEmptyGroup(t *testing.T) {
+	if chuser("0:") == nil {
+		t.Fatal("the empty group is not allowed")
+	}
+}
+
+// Either user only or user and group.
+func TestGroupOnly(t *testing.T) {
+	if chuser(":0") == nil {
+		t.Fatal("group only is not allowed")
+	}
+}
+
+// Usenames must not contain the number sign.
+func TestInvalidUsername(t *testing.T) {
+	const username = "#user"
+	if chuser(username) == nil {
+		t.Fatalf("'%s' is not a valid username", username)
+	}
+}
+
+// User IDs must be non-negative.
+func TestInvalidUserid(t *testing.T) {
+	if chuser("-1") == nil {
+		t.Fatal("User ID cannot be negative")
+	}
+}
+
+// Change to the current user by ID.
+func TestCurrentUserid(t *testing.T) {
+	usr, err := user.Current()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if usr.Uid != "0" {
+		t.Skip("setgroups(2): Only the superuser may set new groups.")
+	}
+
+	if err = chuser(usr.Uid); err != nil {
+		t.Fatal(err)
+	}
+}
+
+// Change to a common user by name.
+func TestCommonUsername(t *testing.T) {
+	usr, err := user.Current()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if usr.Uid != "0" {
+		t.Skip("setgroups(2): Only the superuser may set new groups.")
+	}
+
+	if err := chuser("nobody"); err != nil {
+		if _, ok := err.(user.UnknownUserError); ok {
+			t.Skip(err)
+		}
+		t.Fatal(err)
+	}
+}

cmd/yggdrasil/main.go

@@ -1,34 +1,29 @@
 package main
 
 import (
-	"bytes"
 	"context"
 	"crypto/ed25519"
 	"encoding/hex"
 	"encoding/json"
 	"flag"
 	"fmt"
-	"io"
 	"net"
 	"os"
 	"os/signal"
 	"regexp"
 	"strings"
-	"sync"
 	"syscall"
 
-	"golang.org/x/text/encoding/unicode"
+	"suah.dev/protect"
 
 	"github.com/gologme/log"
 	gsyslog "github.com/hashicorp/go-syslog"
-	"github.com/hjson/hjson-go"
+	"github.com/hjson/hjson-go/v4"
 	"github.com/kardianos/minwinsvc"
-	"github.com/mitchellh/mapstructure"
 
 	"github.com/yggdrasil-network/yggdrasil-go/src/address"
 	"github.com/yggdrasil-network/yggdrasil-go/src/admin"
 	"github.com/yggdrasil-network/yggdrasil-go/src/config"
-	"github.com/yggdrasil-network/yggdrasil-go/src/defaults"
 	"github.com/yggdrasil-network/yggdrasil-go/src/ipv6rwc"
 
 	"github.com/yggdrasil-network/yggdrasil-go/src/core"
@@ -44,75 +39,302 @@ type node struct {
 	admin     *admin.AdminSocket
 }
 
-func readConfig(log *log.Logger, useconf bool, useconffile string, normaliseconf bool) *config.NodeConfig {
+// The main function is responsible for configuring and starting Yggdrasil.
-	// Use a configuration file. If -useconf, the configuration will be read
+func main() {
-	// from stdin. If -useconffile, the configuration will be read from the
+	// Not all operations are coverable with pledge(2), so immediately
-	// filesystem.
+	// limit file system access with unveil(2), effectively preventing
-	var conf []byte
+	// "proc exec" promises right from the start:
-	var err error
+	//
-	if useconffile != "" {
+	// - read arbitrary config file
-		// Read the file from the filesystem
+	// - create/write arbitrary log file
-		conf, err = os.ReadFile(useconffile)
+	// - read/write/chmod/remove admin socket, if at all
+	if err := protect.Unveil("/", "rwc"); err != nil {
+		panic(fmt.Sprintf("unveil: / rwc: %v", err))
+	}
+	if err := protect.UnveilBlock(); err != nil {
+		panic(fmt.Sprintf("unveil: %v", err))
+	}
+
+	genconf := flag.Bool("genconf", false, "print a new config to stdout")
+	useconf := flag.Bool("useconf", false, "read HJSON/JSON config from stdin")
+	useconffile := flag.String("useconffile", "", "read HJSON/JSON config from specified file path")
+	normaliseconf := flag.Bool("normaliseconf", false, "use in combination with either -useconf or -useconffile, outputs your configuration normalised")
+	exportkey := flag.Bool("exportkey", false, "use in combination with either -useconf or -useconffile, outputs your private key in PEM format")
+	confjson := flag.Bool("json", false, "print configuration from -genconf or -normaliseconf as JSON instead of HJSON")
+	autoconf := flag.Bool("autoconf", false, "automatic mode (dynamic IP, peer with IPv6 neighbors)")
+	ver := flag.Bool("version", false, "prints the version of this build")
+	logto := flag.String("logto", "stdout", "file path to log to, \"syslog\" or \"stdout\"")
+	getaddr := flag.Bool("address", false, "use in combination with either -useconf or -useconffile, outputs your IPv6 address")
+	getsnet := flag.Bool("subnet", false, "use in combination with either -useconf or -useconffile, outputs your IPv6 subnet")
+	getpkey := flag.Bool("publickey", false, "use in combination with either -useconf or -useconffile, outputs your public key")
+	loglevel := flag.String("loglevel", "info", "loglevel to enable")
+	chuserto := flag.String("user", "", "user (and, optionally, group) to set UID/GID to")
+	flag.Parse()
+
+	done := make(chan struct{})
+	defer close(done)
+
+	// Catch interrupts from the operating system to exit gracefully.
+	ctx, cancel := signal.NotifyContext(context.Background(), os.Interrupt, syscall.SIGTERM)
+
+	// Create a new logger that logs output to stdout.
+	var logger *log.Logger
+	switch *logto {
+	case "stdout":
+		logger = log.New(os.Stdout, "", log.Flags())
+
+	case "syslog":
+		if syslogger, err := gsyslog.NewLogger(gsyslog.LOG_NOTICE, "DAEMON", version.BuildName()); err == nil {
+			logger = log.New(syslogger, "", log.Flags()&^(log.Ldate|log.Ltime))
+		}
+
+	default:
+		if logfd, err := os.OpenFile(*logto, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644); err == nil {
+			logger = log.New(logfd, "", log.Flags())
+		}
+	}
+	if logger == nil {
+		logger = log.New(os.Stdout, "", log.Flags())
+		logger.Warnln("Logging defaulting to stdout")
+	}
+	if *normaliseconf {
+		setLogLevel("error", logger)
 	} else {
-		// Read the file from stdin.
+		setLogLevel(*loglevel, logger)
-		conf, err = io.ReadAll(os.Stdin)
 	}
-	if err != nil {
+
-		panic(err)
+	cfg := config.GenerateConfig()
+	var err error
+	switch {
+	case *ver:
+		fmt.Println("Build name:", version.BuildName())
+		fmt.Println("Build version:", version.BuildVersion())
+		return
+
+	case *autoconf:
+		// Use an autoconf-generated config, this will give us random keys and
+		// port numbers, and will use an automatically selected TUN interface.
+
+	case *useconf:
+		if _, err := cfg.ReadFrom(os.Stdin); err != nil {
+			panic(err)
+		}
+
+	case *useconffile != "":
+		f, err := os.Open(*useconffile)
+		if err != nil {
+			panic(err)
+		}
+		if _, err := cfg.ReadFrom(f); err != nil {
+			panic(err)
+		}
+		_ = f.Close()
+
+	case *genconf:
+		cfg.AdminListen = ""
+		var bs []byte
+		if *confjson {
+			bs, err = json.MarshalIndent(cfg, "", "  ")
+		} else {
+			bs, err = hjson.Marshal(cfg)
+		}
+		if err != nil {
+			panic(err)
+		}
+		fmt.Println(string(bs))
+		return
+
+	default:
+		fmt.Println("Usage:")
+		flag.PrintDefaults()
+
+		if *getaddr || *getsnet {
+			fmt.Println("\nError: You need to specify some config data using -useconf or -useconffile.")
+		}
+		return
 	}
-	// If there's a byte order mark - which Windows 10 is now incredibly fond of
+
-	// throwing everywhere when it's converting things into UTF-16 for the hell
+	privateKey := ed25519.PrivateKey(cfg.PrivateKey)
-	// of it - remove it and decode back down into UTF-8. This is necessary
+	publicKey := privateKey.Public().(ed25519.PublicKey)
-	// because hjson doesn't know what to do with UTF-16 and will panic
+
-	if bytes.Equal(conf[0:2], []byte{0xFF, 0xFE}) ||
+	switch {
-		bytes.Equal(conf[0:2], []byte{0xFE, 0xFF}) {
+	case *getaddr:
-		utf := unicode.UTF16(unicode.BigEndian, unicode.UseBOM)
+		addr := address.AddrForKey(publicKey)
-		decoder := utf.NewDecoder()
+		ip := net.IP(addr[:])
-		conf, err = decoder.Bytes(conf)
+		fmt.Println(ip.String())
+		return
+
+	case *getsnet:
+		snet := address.SubnetForKey(publicKey)
+		ipnet := net.IPNet{
+			IP:   append(snet[:], 0, 0, 0, 0, 0, 0, 0, 0),
+			Mask: net.CIDRMask(len(snet)*8, 128),
+		}
+		fmt.Println(ipnet.String())
+		return
+
+	case *getpkey:
+		fmt.Println(hex.EncodeToString(publicKey))
+		return
+
+	case *normaliseconf:
+		cfg.AdminListen = ""
+		if cfg.PrivateKeyPath != "" {
+			cfg.PrivateKey = nil
+		}
+		var bs []byte
+		if *confjson {
+			bs, err = json.MarshalIndent(cfg, "", "  ")
+		} else {
+			bs, err = hjson.Marshal(cfg)
+		}
+		if err != nil {
+			panic(err)
+		}
+		fmt.Println(string(bs))
+		return
+
+	case *exportkey:
+		pem, err := cfg.MarshalPEMPrivateKey()
+		if err != nil {
+			panic(err)
+		}
+		fmt.Println(string(pem))
+		return
+	}
+
+	n := &node{}
+
+	// Set up the Yggdrasil node itself.
+	{
+		iprange := net.IPNet{
+			IP:   net.ParseIP("200::"),
+			Mask: net.CIDRMask(7, 128),
+		}
+		options := []core.SetupOption{
+			core.NodeInfo(cfg.NodeInfo),
+			core.NodeInfoPrivacy(cfg.NodeInfoPrivacy),
+			core.PeerFilter(func(ip net.IP) bool {
+				return !iprange.Contains(ip)
+			}),
+		}
+		for _, addr := range cfg.Listen {
+			options = append(options, core.ListenAddress(addr))
+		}
+		for _, peer := range cfg.Peers {
+			options = append(options, core.Peer{URI: peer})
+		}
+		for intf, peers := range cfg.InterfacePeers {
+			for _, peer := range peers {
+				options = append(options, core.Peer{URI: peer, SourceInterface: intf})
+			}
+		}
+		for _, allowed := range cfg.AllowedPublicKeys {
+			k, err := hex.DecodeString(allowed)
+			if err != nil {
+				panic(err)
+			}
+			options = append(options, core.AllowedPublicKey(k[:]))
+		}
+		if n.core, err = core.New(cfg.Certificate, logger, options...); err != nil {
+			panic(err)
+		}
+		address, subnet := n.core.Address(), n.core.Subnet()
+		logger.Printf("Your public key is %s", hex.EncodeToString(n.core.PublicKey()))
+		logger.Printf("Your IPv6 address is %s", address.String())
+		logger.Printf("Your IPv6 subnet is %s", subnet.String())
+	}
+
+	// Set up the admin socket.
+	{
+		options := []admin.SetupOption{
+			admin.ListenAddress(cfg.AdminListen),
+		}
+		if cfg.LogLookups {
+			options = append(options, admin.LogLookups{})
+		}
+		if n.admin, err = admin.New(n.core, logger, options...); err != nil {
+			panic(err)
+		}
+		if n.admin != nil {
+			n.admin.SetupAdminHandlers()
+		}
+	}
+
+	// Set up the multicast module.
+	{
+		options := []multicast.SetupOption{}
+		for _, intf := range cfg.MulticastInterfaces {
+			options = append(options, multicast.MulticastInterface{
+				Regex:    regexp.MustCompile(intf.Regex),
+				Beacon:   intf.Beacon,
+				Listen:   intf.Listen,
+				Port:     intf.Port,
+				Priority: uint8(intf.Priority),
+				Password: intf.Password,
+			})
+		}
+		if n.multicast, err = multicast.New(n.core, logger, options...); err != nil {
+			panic(err)
+		}
+		if n.admin != nil && n.multicast != nil {
+			n.multicast.SetupAdminHandlers(n.admin)
+		}
+	}
+
+	// Set up the TUN module.
+	{
+		options := []tun.SetupOption{
+			tun.InterfaceName(cfg.IfName),
+			tun.InterfaceMTU(cfg.IfMTU),
+		}
+		if n.tun, err = tun.New(ipv6rwc.NewReadWriteCloser(n.core), logger, options...); err != nil {
+			panic(err)
+		}
+		if n.admin != nil && n.tun != nil {
+			n.tun.SetupAdminHandlers(n.admin)
+		}
+	}
+
+	//Windows service shutdown
+	minwinsvc.SetOnExit(func() {
+		logger.Infof("Shutting down service ...")
+		cancel()
+		// Wait for all parts to shutdown properly
+		<-done
+	})
+
+	// Change user if requested
+	if *chuserto != "" {
+		err = chuser(*chuserto)
 		if err != nil {
 			panic(err)
 		}
 	}
-	// Generate a new configuration - this gives us a set of sane defaults -
-	// then parse the configuration we loaded above on top of it. The effect
-	// of this is that any configuration item that is missing from the provided
-	// configuration will use a sane default.
-	cfg := defaults.GenerateConfig()
-	var dat map[string]interface{}
-	if err := hjson.Unmarshal(conf, &dat); err != nil {
-		panic(err)
-	}
-	// Sanitise the config
-	confJson, err := json.Marshal(dat)
-	if err != nil {
-		panic(err)
-	}
-	if err := json.Unmarshal(confJson, &cfg); err != nil {
-		panic(err)
-	}
-	// Overlay our newly mapped configuration onto the autoconf node config that
-	// we generated above.
-	if err = mapstructure.Decode(dat, &cfg); err != nil {
-		panic(err)
-	}
-	return cfg
-}
 
-// Generates a new configuration and returns it in HJSON format. This is used
+	// Promise final modes of operation.  At this point, if at all:
-// with -genconf.
+	// - raw socket is created/open
-func doGenconf(isjson bool) string {
+	// - admin socket is created/open
-	cfg := defaults.GenerateConfig()
+	// - privileges are dropped to non-root user
-	var bs []byte
+	//
-	var err error
+	// Peers, InterfacePeers, Listen can be UNIX sockets;
-	if isjson {
+	// Go's net.Listen.Close() deletes files on shutdown.
-		bs, err = json.MarshalIndent(cfg, "", "  ")
+	promises := []string{"stdio", "cpath", "inet", "unix", "dns"}
-	} else {
+	if len(cfg.MulticastInterfaces) > 0 {
-		bs, err = hjson.Marshal(cfg)
+		promises = append(promises, "mcast")
 	}
-	if err != nil {
+	if err := protect.Pledge(strings.Join(promises, " ")); err != nil {
-		panic(err)
+		panic(fmt.Sprintf("pledge: %v: %v", promises, err))
 	}
-	return string(bs)
+
+	// Block until we are told to shut down.
+	<-ctx.Done()
+
+	// Shut down the node.
+	_ = n.admin.Stop()
+	_ = n.multicast.Stop()
+	_ = n.tun.Stop()
+	n.core.Stop()
 }
 
 func setLogLevel(loglevel string, logger *log.Logger) {
@@ -140,269 +362,3 @@ func setLogLevel(loglevel string, logger *log.Logger) {
 		}
 	}
 }
-
-type yggArgs struct {
-	genconf       bool
-	useconf       bool
-	normaliseconf bool
-	confjson      bool
-	autoconf      bool
-	ver           bool
-	getaddr       bool
-	getsnet       bool
-	useconffile   string
-	logto         string
-	loglevel      string
-}
-
-func getArgs() yggArgs {
-	genconf := flag.Bool("genconf", false, "print a new config to stdout")
-	useconf := flag.Bool("useconf", false, "read HJSON/JSON config from stdin")
-	useconffile := flag.String("useconffile", "", "read HJSON/JSON config from specified file path")
-	normaliseconf := flag.Bool("normaliseconf", false, "use in combination with either -useconf or -useconffile, outputs your configuration normalised")
-	confjson := flag.Bool("json", false, "print configuration from -genconf or -normaliseconf as JSON instead of HJSON")
-	autoconf := flag.Bool("autoconf", false, "automatic mode (dynamic IP, peer with IPv6 neighbors)")
-	ver := flag.Bool("version", false, "prints the version of this build")
-	logto := flag.String("logto", "stdout", "file path to log to, \"syslog\" or \"stdout\"")
-	getaddr := flag.Bool("address", false, "returns the IPv6 address as derived from the supplied configuration")
-	getsnet := flag.Bool("subnet", false, "returns the IPv6 subnet as derived from the supplied configuration")
-	loglevel := flag.String("loglevel", "info", "loglevel to enable")
-	flag.Parse()
-	return yggArgs{
-		genconf:       *genconf,
-		useconf:       *useconf,
-		useconffile:   *useconffile,
-		normaliseconf: *normaliseconf,
-		confjson:      *confjson,
-		autoconf:      *autoconf,
-		ver:           *ver,
-		logto:         *logto,
-		getaddr:       *getaddr,
-		getsnet:       *getsnet,
-		loglevel:      *loglevel,
-	}
-}
-
-// The main function is responsible for configuring and starting Yggdrasil.
-func run(args yggArgs, ctx context.Context) {
-	// Create a new logger that logs output to stdout.
-	var logger *log.Logger
-	switch args.logto {
-	case "stdout":
-		logger = log.New(os.Stdout, "", log.Flags())
-	case "syslog":
-		if syslogger, err := gsyslog.NewLogger(gsyslog.LOG_NOTICE, "DAEMON", version.BuildName()); err == nil {
-			logger = log.New(syslogger, "", log.Flags())
-		}
-	default:
-		if logfd, err := os.OpenFile(args.logto, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644); err == nil {
-			logger = log.New(logfd, "", log.Flags())
-		}
-	}
-	if logger == nil {
-		logger = log.New(os.Stdout, "", log.Flags())
-		logger.Warnln("Logging defaulting to stdout")
-	}
-
-	if args.normaliseconf {
-		setLogLevel("error", logger)
-	} else {
-		setLogLevel(args.loglevel, logger)
-	}
-
-	var cfg *config.NodeConfig
-	var err error
-	switch {
-	case args.ver:
-		fmt.Println("Build name:", version.BuildName())
-		fmt.Println("Build version:", version.BuildVersion())
-		return
-	case args.autoconf:
-		// Use an autoconf-generated config, this will give us random keys and
-		// port numbers, and will use an automatically selected TUN interface.
-		cfg = defaults.GenerateConfig()
-	case args.useconffile != "" || args.useconf:
-		// Read the configuration from either stdin or from the filesystem
-		cfg = readConfig(logger, args.useconf, args.useconffile, args.normaliseconf)
-		// If the -normaliseconf option was specified then remarshal the above
-		// configuration and print it back to stdout. This lets the user update
-		// their configuration file with newly mapped names (like above) or to
-		// convert from plain JSON to commented HJSON.
-		if args.normaliseconf {
-			var bs []byte
-			if args.confjson {
-				bs, err = json.MarshalIndent(cfg, "", "  ")
-			} else {
-				bs, err = hjson.Marshal(cfg)
-			}
-			if err != nil {
-				panic(err)
-			}
-			fmt.Println(string(bs))
-			return
-		}
-	case args.genconf:
-		// Generate a new configuration and print it to stdout.
-		fmt.Println(doGenconf(args.confjson))
-		return
-	default:
-		// No flags were provided, therefore print the list of flags to stdout.
-		fmt.Println("Usage:")
-		flag.PrintDefaults()
-
-		if args.getaddr || args.getsnet {
-			fmt.Println("\nError: You need to specify some config data using -useconf or -useconffile.")
-		}
-	}
-	// Have we got a working configuration? If we don't then it probably means
-	// that neither -autoconf, -useconf or -useconffile were set above. Stop
-	// if we don't.
-	if cfg == nil {
-		return
-	}
-	// Have we been asked for the node address yet? If so, print it and then stop.
-	getNodeKey := func() ed25519.PublicKey {
-		if pubkey, err := hex.DecodeString(cfg.PrivateKey); err == nil {
-			return ed25519.PrivateKey(pubkey).Public().(ed25519.PublicKey)
-		}
-		return nil
-	}
-	switch {
-	case args.getaddr:
-		if key := getNodeKey(); key != nil {
-			addr := address.AddrForKey(key)
-			ip := net.IP(addr[:])
-			fmt.Println(ip.String())
-		}
-		return
-	case args.getsnet:
-		if key := getNodeKey(); key != nil {
-			snet := address.SubnetForKey(key)
-			ipnet := net.IPNet{
-				IP:   append(snet[:], 0, 0, 0, 0, 0, 0, 0, 0),
-				Mask: net.CIDRMask(len(snet)*8, 128),
-			}
-			fmt.Println(ipnet.String())
-		}
-		return
-	}
-
-	n := &node{}
-
-	// Setup the Yggdrasil node itself.
-	{
-		sk, err := hex.DecodeString(cfg.PrivateKey)
-		if err != nil {
-			panic(err)
-		}
-		options := []core.SetupOption{
-			core.NodeInfo(cfg.NodeInfo),
-			core.NodeInfoPrivacy(cfg.NodeInfoPrivacy),
-		}
-		for _, addr := range cfg.Listen {
-			options = append(options, core.ListenAddress(addr))
-		}
-		for _, peer := range cfg.Peers {
-			options = append(options, core.Peer{URI: peer})
-		}
-		for intf, peers := range cfg.InterfacePeers {
-			for _, peer := range peers {
-				options = append(options, core.Peer{URI: peer, SourceInterface: intf})
-			}
-		}
-		for _, allowed := range cfg.AllowedPublicKeys {
-			k, err := hex.DecodeString(allowed)
-			if err != nil {
-				panic(err)
-			}
-			options = append(options, core.AllowedPublicKey(k[:]))
-		}
-		if n.core, err = core.New(sk[:], logger, options...); err != nil {
-			panic(err)
-		}
-	}
-
-	// Setup the admin socket.
-	{
-		options := []admin.SetupOption{
-			admin.ListenAddress(cfg.AdminListen),
-		}
-		if n.admin, err = admin.New(n.core, logger, options...); err != nil {
-			panic(err)
-		}
-		if n.admin != nil {
-			n.admin.SetupAdminHandlers()
-		}
-	}
-
-	// Setup the multicast module.
-	{
-		options := []multicast.SetupOption{}
-		for _, intf := range cfg.MulticastInterfaces {
-			options = append(options, multicast.MulticastInterface{
-				Regex:    regexp.MustCompile(intf.Regex),
-				Beacon:   intf.Beacon,
-				Listen:   intf.Listen,
-				Port:     intf.Port,
-				Priority: uint8(intf.Priority),
-			})
-		}
-		if n.multicast, err = multicast.New(n.core, logger, options...); err != nil {
-			panic(err)
-		}
-		if n.admin != nil && n.multicast != nil {
-			n.multicast.SetupAdminHandlers(n.admin)
-		}
-	}
-
-	// Setup the TUN module.
-	{
-		options := []tun.SetupOption{
-			tun.InterfaceName(cfg.IfName),
-			tun.InterfaceMTU(cfg.IfMTU),
-		}
-		if n.tun, err = tun.New(ipv6rwc.NewReadWriteCloser(n.core), logger, options...); err != nil {
-			panic(err)
-		}
-		if n.admin != nil && n.tun != nil {
-			n.tun.SetupAdminHandlers(n.admin)
-		}
-	}
-
-	// Make some nice output that tells us what our IPv6 address and subnet are.
-	// This is just logged to stdout for the user.
-	address := n.core.Address()
-	subnet := n.core.Subnet()
-	public := n.core.GetSelf().Key
-	logger.Infof("Your public key is %s", hex.EncodeToString(public[:]))
-	logger.Infof("Your IPv6 address is %s", address.String())
-	logger.Infof("Your IPv6 subnet is %s", subnet.String())
-
-	// Block until we are told to shut down.
-	<-ctx.Done()
-
-	// Shut down the node.
-	_ = n.admin.Stop()
-	_ = n.multicast.Stop()
-	_ = n.tun.Stop()
-	n.core.Stop()
-}
-
-func main() {
-	args := getArgs()
-
-	// Catch interrupts from the operating system to exit gracefully.
-	ctx, cancel := signal.NotifyContext(context.Background(), os.Interrupt, syscall.SIGTERM)
-
-	// Capture the service being stopped on Windows.
-	minwinsvc.SetOnExit(cancel)
-
-	// Start the node, block and then wait for it to shut down.
-	var wg sync.WaitGroup
-	wg.Add(1)
-	go func() {
-		defer wg.Done()
-		run(args, ctx)
-	}()
-	wg.Wait()
-}

cmd/yggdrasilctl/cmd_line_env.go

@@ -7,10 +7,10 @@ import (
 	"log"
 	"os"
 
-	"github.com/hjson/hjson-go"
+	"github.com/hjson/hjson-go/v4"
 	"golang.org/x/text/encoding/unicode"
 
-	"github.com/yggdrasil-network/yggdrasil-go/src/defaults"
+	"github.com/yggdrasil-network/yggdrasil-go/src/config"
 )
 
 type CmdLineEnv struct {
@@ -21,7 +21,7 @@ type CmdLineEnv struct {
 
 func newCmdLineEnv() CmdLineEnv {
 	var cmdLineEnv CmdLineEnv
-	cmdLineEnv.endpoint = defaults.GetDefaults().DefaultAdminListen
+	cmdLineEnv.endpoint = config.GetDefaults().DefaultAdminListen
 	return cmdLineEnv
 }
 
@@ -38,10 +38,8 @@ func (cmdLineEnv *CmdLineEnv) parseFlagsAndArgs() {
 		fmt.Println("Examples:")
 		fmt.Println("  - ", os.Args[0], "list")
 		fmt.Println("  - ", os.Args[0], "getPeers")
-		fmt.Println("  - ", os.Args[0], "-v getSelf")
+		fmt.Println("  - ", os.Args[0], "-endpoint=tcp://localhost:9001 getPeers")
-		fmt.Println("  - ", os.Args[0], "setTunTap name=auto mtu=1500 tap_mode=false")
+		fmt.Println("  - ", os.Args[0], "-endpoint=unix:///var/run/ygg.sock getPeers")
-		fmt.Println("  - ", os.Args[0], "-endpoint=tcp://localhost:9001 getDHT")
-		fmt.Println("  - ", os.Args[0], "-endpoint=unix:///var/run/ygg.sock getDHT")
 	}
 
 	server := flag.String("endpoint", cmdLineEnv.endpoint, "Admin socket endpoint")
@@ -58,31 +56,31 @@ func (cmdLineEnv *CmdLineEnv) parseFlagsAndArgs() {
 
 func (cmdLineEnv *CmdLineEnv) setEndpoint(logger *log.Logger) {
 	if cmdLineEnv.server == cmdLineEnv.endpoint {
-		if config, err := os.ReadFile(defaults.GetDefaults().DefaultConfigFile); err == nil {
+		if cfg, err := os.ReadFile(config.GetDefaults().DefaultConfigFile); err == nil {
-			if bytes.Equal(config[0:2], []byte{0xFF, 0xFE}) ||
+			if bytes.Equal(cfg[0:2], []byte{0xFF, 0xFE}) ||
-				bytes.Equal(config[0:2], []byte{0xFE, 0xFF}) {
+				bytes.Equal(cfg[0:2], []byte{0xFE, 0xFF}) {
 				utf := unicode.UTF16(unicode.BigEndian, unicode.UseBOM)
 				decoder := utf.NewDecoder()
-				config, err = decoder.Bytes(config)
+				cfg, err = decoder.Bytes(cfg)
 				if err != nil {
 					panic(err)
 				}
 			}
 			var dat map[string]interface{}
-			if err := hjson.Unmarshal(config, &dat); err != nil {
+			if err := hjson.Unmarshal(cfg, &dat); err != nil {
 				panic(err)
 			}
 			if ep, ok := dat["AdminListen"].(string); ok && (ep != "none" && ep != "") {
 				cmdLineEnv.endpoint = ep
-				logger.Println("Found platform default config file", defaults.GetDefaults().DefaultConfigFile)
+				logger.Println("Found platform default config file", config.GetDefaults().DefaultConfigFile)
 				logger.Println("Using endpoint", cmdLineEnv.endpoint, "from AdminListen")
 			} else {
 				logger.Println("Configuration file doesn't contain appropriate AdminListen option")
-				logger.Println("Falling back to platform default", defaults.GetDefaults().DefaultAdminListen)
+				logger.Println("Falling back to platform default", config.GetDefaults().DefaultAdminListen)
 			}
 		} else {
-			logger.Println("Can't open config file from default location", defaults.GetDefaults().DefaultConfigFile)
+			logger.Println("Can't open config file from default location", config.GetDefaults().DefaultConfigFile)
-			logger.Println("Falling back to platform default", defaults.GetDefaults().DefaultAdminListen)
+			logger.Println("Falling back to platform default", config.GetDefaults().DefaultAdminListen)
 		}
 	} else {
 		cmdLineEnv.endpoint = cmdLineEnv.server

cmd/yggdrasilctl/main.go

@@ -13,6 +13,8 @@ import (
 	"strings"
 	"time"
 
+	"suah.dev/protect"
+
 	"github.com/olekukonko/tablewriter"
 	"github.com/yggdrasil-network/yggdrasil-go/src/admin"
 	"github.com/yggdrasil-network/yggdrasil-go/src/core"
@@ -22,6 +24,11 @@ import (
 )
 
 func main() {
+	// read config, speak DNS/TCP and/or over a UNIX socket
+	if err := protect.Pledge("stdio rpath inet unix dns"); err != nil {
+		panic(err)
+	}
+
 	// makes sure we can use defer and still return an error code to the OS
 	os.Exit(run())
 }
@@ -78,6 +85,11 @@ func run() int {
 		panic(err)
 	}
 
+	// config and socket are done, work without unprivileges
+	if err := protect.Pledge("stdio"); err != nil {
+		panic(err)
+	}
+
 	logger.Println("Connected")
 	defer conn.Close()
 
@@ -165,7 +177,7 @@ func run() int {
 		table.Append([]string{"Build version:", resp.BuildVersion})
 		table.Append([]string{"IPv6 address:", resp.IPAddress})
 		table.Append([]string{"IPv6 subnet:", resp.Subnet})
-		table.Append([]string{"Coordinates:", fmt.Sprintf("%v", resp.Coords)})
+		table.Append([]string{"Routing table size:", fmt.Sprintf("%d", resp.RoutingEntries)})
 		table.Append([]string{"Public key:", resp.PublicKey})
 		table.Render()
 
@@ -174,33 +186,61 @@ func run() int {
 		if err := json.Unmarshal(recv.Response, &resp); err != nil {
 			panic(err)
 		}
-		table.SetHeader([]string{"Port", "Public Key", "IP Address", "Uptime", "RX", "TX", "Pr", "URI"})
+		table.SetHeader([]string{"URI", "State", "Dir", "IP Address", "Uptime", "RTT", "RX", "TX", "Down", "Up", "Pr", "Cost", "Last Error"})
 		for _, peer := range resp.Peers {
+			state, lasterr, dir, rtt, rxr, txr := "Up", "-", "Out", "-", "-", "-"
+			if !peer.Up {
+				state, lasterr = "Down", fmt.Sprintf("%s ago: %s", peer.LastErrorTime.Round(time.Second), peer.LastError)
+			} else if rttms := float64(peer.Latency.Microseconds()) / 1000; rttms > 0 {
+				rtt = fmt.Sprintf("%.02fms", rttms)
+			}
+			if peer.Inbound {
+				dir = "In"
+			}
+			uristring := peer.URI
+			if uri, err := url.Parse(peer.URI); err == nil {
+				uri.RawQuery = ""
+				uristring = uri.String()
+			}
+			if peer.RXRate > 0 {
+				rxr = peer.RXRate.String() + "/s"
+			}
+			if peer.TXRate > 0 {
+				txr = peer.TXRate.String() + "/s"
+			}
 			table.Append([]string{
-				fmt.Sprintf("%d", peer.Port),
+				uristring,
-				peer.PublicKey,
+				state,
+				dir,
 				peer.IPAddress,
 				(time.Duration(peer.Uptime) * time.Second).String(),
+				rtt,
 				peer.RXBytes.String(),
 				peer.TXBytes.String(),
+				rxr,
+				txr,
 				fmt.Sprintf("%d", peer.Priority),
-				peer.Remote,
+				fmt.Sprintf("%d", peer.Cost),
+				lasterr,
 			})
 		}
 		table.Render()
 
-	case "getdht":
+	case "gettree":
-		var resp admin.GetDHTResponse
+		var resp admin.GetTreeResponse
 		if err := json.Unmarshal(recv.Response, &resp); err != nil {
 			panic(err)
 		}
-		table.SetHeader([]string{"Public Key", "IP Address", "Port", "Rest"})
+		//table.SetHeader([]string{"Public Key", "IP Address", "Port", "Rest"})
-		for _, dht := range resp.DHT {
+		table.SetHeader([]string{"Public Key", "IP Address", "Parent", "Sequence"})
+		for _, tree := range resp.Tree {
 			table.Append([]string{
-				dht.PublicKey,
+				tree.PublicKey,
-				dht.IPAddress,
+				tree.IPAddress,
-				fmt.Sprintf("%d", dht.Port),
+				tree.Parent,
-				fmt.Sprintf("%d", dht.Rest),
+				fmt.Sprintf("%d", tree.Sequence),
+				//fmt.Sprintf("%d", dht.Port),
+				//fmt.Sprintf("%d", dht.Rest),
 			})
 		}
 		table.Render()
@@ -210,12 +250,13 @@ func run() int {
 		if err := json.Unmarshal(recv.Response, &resp); err != nil {
 			panic(err)
 		}
-		table.SetHeader([]string{"Public Key", "IP Address", "Path"})
+		table.SetHeader([]string{"Public Key", "IP Address", "Path", "Seq"})
 		for _, p := range resp.Paths {
 			table.Append([]string{
 				p.PublicKey,
 				p.IPAddress,
 				fmt.Sprintf("%v", p.Path),
+				fmt.Sprintf("%d", p.Sequence),
 			})
 		}
 		table.Render()
@@ -252,9 +293,21 @@ func run() int {
 		if err := json.Unmarshal(recv.Response, &resp); err != nil {
 			panic(err)
 		}
-		table.SetHeader([]string{"Interface"})
+		fmtBool := func(b bool) string {
+			if b {
+				return "Yes"
+			}
+			return "-"
+		}
+		table.SetHeader([]string{"Name", "Listen Address", "Beacon", "Listen", "Password"})
 		for _, p := range resp.Interfaces {
-			table.Append([]string{p})
+			table.Append([]string{
+				p.Name,
+				p.Address,
+				fmtBool(p.Beacon),
+				fmtBool(p.Listen),
+				fmtBool(p.Password),
+			})
 		}
 		table.Render()
 

contrib/ansible/genkeys.go

@@ -1,7 +1,5 @@
 /*
-
 This file generates crypto keys for [ansible-yggdrasil](https://github.com/jcgruenhage/ansible-yggdrasil/)
-
 */
 package main
 

contrib/apparmor/usr.bin.yggdrasilctl

@@ -0,0 +1,11 @@
+# Last Modified: Mon Feb  3 22:19:45 2025
+include <tunables/global>
+
+/usr/bin/yggdrasilctl {
+  include <abstractions/base>
+
+  /etc/yggdrasil.conf rw,
+  /run/yggdrasil.sock rw,
+  owner /sys/kernel/mm/transparent_hugepage/hpage_pmd_size r,
+
+}

contrib/deb/generate.sh

@@ -21,13 +21,16 @@ if [ $PKGBRANCH = "master" ]; then
   PKGREPLACES=yggdrasil-develop
 fi
 
-if [ $PKGARCH = "amd64" ]; then GOARCH=amd64 GOOS=linux ./build
+GOLDFLAGS="-X github.com/yggdrasil-network/yggdrasil-go/src/config.defaultConfig=/etc/yggdrasil/yggdrasil.conf"
-elif [ $PKGARCH = "i386" ]; then GOARCH=386 GOOS=linux ./build
+GOLDFLAGS="${GOLDFLAGS} -X github.com/yggdrasil-network/yggdrasil-go/src/config.defaultAdminListen=unix:///var/run/yggdrasil/yggdrasil.sock"
-elif [ $PKGARCH = "mipsel" ]; then GOARCH=mipsle GOOS=linux ./build
+
-elif [ $PKGARCH = "mips" ]; then GOARCH=mips64 GOOS=linux ./build
+if [ $PKGARCH = "amd64" ]; then GOARCH=amd64 GOOS=linux ./build -l "${GOLDFLAGS}"
-elif [ $PKGARCH = "armhf" ]; then GOARCH=arm GOOS=linux GOARM=6 ./build
+elif [ $PKGARCH = "i386" ]; then GOARCH=386 GOOS=linux ./build -l "${GOLDFLAGS}"
-elif [ $PKGARCH = "arm64" ]; then GOARCH=arm64 GOOS=linux ./build
+elif [ $PKGARCH = "mipsel" ]; then GOARCH=mipsle GOOS=linux ./build -l "${GOLDFLAGS}"
-elif [ $PKGARCH = "armel" ]; then GOARCH=arm GOOS=linux GOARM=5 ./build
+elif [ $PKGARCH = "mips" ]; then GOARCH=mips64 GOOS=linux ./build -l "${GOLDFLAGS}"
+elif [ $PKGARCH = "armhf" ]; then GOARCH=arm GOOS=linux GOARM=6 ./build -l "${GOLDFLAGS}"
+elif [ $PKGARCH = "arm64" ]; then GOARCH=arm64 GOOS=linux ./build -l "${GOLDFLAGS}"
+elif [ $PKGARCH = "armel" ]; then GOARCH=arm GOOS=linux GOARM=5 ./build -l "${GOLDFLAGS}"
 else
   echo "Specify PKGARCH=amd64,i386,mips,mipsel,armhf,arm64,armel"
   exit 1
@@ -38,7 +41,7 @@ echo "Building $PKGFILE"
 mkdir -p /tmp/$PKGNAME/
 mkdir -p /tmp/$PKGNAME/debian/
 mkdir -p /tmp/$PKGNAME/usr/bin/
-mkdir -p /tmp/$PKGNAME/etc/systemd/system/
+mkdir -p /tmp/$PKGNAME/lib/systemd/system/
 
 cat > /tmp/$PKGNAME/debian/changelog << EOF
 Please see https://github.com/yggdrasil-network/yggdrasil-go/
@@ -47,11 +50,12 @@ echo 9 > /tmp/$PKGNAME/debian/compat
 cat > /tmp/$PKGNAME/debian/control << EOF
 Package: $PKGNAME
 Version: $PKGVERSION
-Section: contrib/net
+Section: golang
-Priority: extra
+Priority: optional
 Architecture: $PKGARCH
 Replaces: $PKGREPLACES
 Conflicts: $PKGREPLACES
+Depends: systemd
 Maintainer: Neil Alexander <neilalexander@users.noreply.github.com>
 Description: Yggdrasil Network
  Yggdrasil is an early-stage implementation of a fully end-to-end encrypted IPv6
@@ -68,35 +72,52 @@ EOF
 cat > /tmp/$PKGNAME/debian/install << EOF
 usr/bin/yggdrasil usr/bin
 usr/bin/yggdrasilctl usr/bin
-etc/systemd/system/*.service etc/systemd/system
+lib/systemd/system/*.service lib/systemd/system
 EOF
 cat > /tmp/$PKGNAME/debian/postinst << EOF
 #!/bin/sh
 
+systemctl daemon-reload
+
 if ! getent group yggdrasil 2>&1 > /dev/null; then
-  groupadd --system --force yggdrasil || echo "Failed to create group 'yggdrasil' - please create it manually and reinstall"
+  groupadd --system --force yggdrasil
 fi
 
-if [ -f /etc/yggdrasil.conf ];
+if [ ! -d /etc/yggdrasil ];
+then
+    mkdir -p /etc/yggdrasil
+    chown root:yggdrasil /etc/yggdrasil
+    chmod 750 /etc/yggdrasil
+fi
+
+if [ ! -f /etc/yggdrasil/yggdrasil.conf ];
+then
+    test -f /etc/yggdrasil.conf && mv /etc/yggdrasil.conf /etc/yggdrasil/yggdrasil.conf
+fi
+
+if [ -f /etc/yggdrasil/yggdrasil.conf ];
 then
   mkdir -p /var/backups
   echo "Backing up configuration file to /var/backups/yggdrasil.conf.`date +%Y%m%d`"
-  cp /etc/yggdrasil.conf /var/backups/yggdrasil.conf.`date +%Y%m%d`
+  cp /etc/yggdrasil/yggdrasil.conf /var/backups/yggdrasil.conf.`date +%Y%m%d`
-  echo "Normalising and updating /etc/yggdrasil.conf"
-  /usr/bin/yggdrasil -useconf -normaliseconf < /var/backups/yggdrasil.conf.`date +%Y%m%d` > /etc/yggdrasil.conf
-  chgrp yggdrasil /etc/yggdrasil.conf
 
-  if command -v systemctl >/dev/null; then
+  echo "Normalising and updating /etc/yggdrasil/yggdrasil.conf"
-    systemctl daemon-reload >/dev/null || true
+  /usr/bin/yggdrasil -useconf -normaliseconf < /var/backups/yggdrasil.conf.`date +%Y%m%d` > /etc/yggdrasil/yggdrasil.conf
-    systemctl enable yggdrasil || true
+
-    systemctl start yggdrasil || true
+  chown root:yggdrasil /etc/yggdrasil/yggdrasil.conf
-  fi
+  chmod 640 /etc/yggdrasil/yggdrasil.conf
 else
-  echo "Generating initial configuration file /etc/yggdrasil.conf"
+  echo "Generating initial configuration file /etc/yggdrasil/yggdrasil.conf"
-  echo "Please familiarise yourself with this file before starting Yggdrasil"
+  /usr/bin/yggdrasil -genconf > /etc/yggdrasil/yggdrasil.conf
-  sh -c 'umask 0027 && /usr/bin/yggdrasil -genconf > /etc/yggdrasil.conf'
+
-  chgrp yggdrasil /etc/yggdrasil.conf
+  chown root:yggdrasil /etc/yggdrasil/yggdrasil.conf
+  chmod 640 /etc/yggdrasil/yggdrasil.conf
 fi
+
+systemctl enable yggdrasil
+systemctl restart yggdrasil
+
+exit 0
 EOF
 cat > /tmp/$PKGNAME/debian/prerm << EOF
 #!/bin/sh
@@ -110,13 +131,14 @@ EOF
 
 cp yggdrasil /tmp/$PKGNAME/usr/bin/
 cp yggdrasilctl /tmp/$PKGNAME/usr/bin/
-cp contrib/systemd/*.service /tmp/$PKGNAME/etc/systemd/system/
+cp contrib/systemd/yggdrasil-default-config.service.debian /tmp/$PKGNAME/lib/systemd/system/yggdrasil-default-config.service
+cp contrib/systemd/yggdrasil.service.debian /tmp/$PKGNAME/lib/systemd/system/yggdrasil.service
 
-tar -czvf /tmp/$PKGNAME/data.tar.gz -C /tmp/$PKGNAME/ \
+tar --no-xattrs -czvf /tmp/$PKGNAME/data.tar.gz -C /tmp/$PKGNAME/ \
   usr/bin/yggdrasil usr/bin/yggdrasilctl \
-  etc/systemd/system/yggdrasil.service \
+  lib/systemd/system/yggdrasil.service \
-  etc/systemd/system/yggdrasil-default-config.service
+  lib/systemd/system/yggdrasil-default-config.service
-tar -czvf /tmp/$PKGNAME/control.tar.gz -C /tmp/$PKGNAME/debian .
+tar --no-xattrs -czvf /tmp/$PKGNAME/control.tar.gz -C /tmp/$PKGNAME/debian .
 echo 2.0 > /tmp/$PKGNAME/debian-binary
 
 ar -r $PKGFILE \

contrib/mobile/build

@@ -7,6 +7,7 @@ set -ef
 PKGSRC=${PKGSRC:-github.com/yggdrasil-network/yggdrasil-go/src/version}
 PKGNAME=${PKGNAME:-$(sh contrib/semver/name.sh)}
 PKGVER=${PKGVER:-$(sh contrib/semver/version.sh --bare)}
+GOVER=$(go version | { read _ _ version _; echo ${version#go}; })
 
 LDFLAGS="-X $PKGSRC.buildName=$PKGNAME -X $PKGSRC.buildVersion=$PKGVER"
 ARGS="-v"
@@ -33,11 +34,20 @@ if [ ! $IOS ] && [ ! $ANDROID ]; then
   exit 1
 fi
 
+ver_le() {
+    printf "$1\n$2\n" | sort -VC
+}
+
+if [ $ANDROID ] && ver_le 1.23.0 $GOVER ; then
+    # github.com/wlynxg/anet library relies on //go:linkname
+    LDFLAGS="$LDFLAGS -checklinkname=0"
+fi
+
 if [ $IOS ]; then
   echo "Building framework for iOS"
   go get golang.org/x/mobile/bind
   gomobile bind \
-    -target ios -tags mobile -o Yggdrasil.xcframework \
+    -target ios,macos -tags mobile -o Yggdrasil.xcframework \
     -ldflags="$LDFLAGS $STRIP" -gcflags="$GCFLAGS" \
     ./contrib/mobile ./src/config;
 fi

contrib/mobile/mobile.go

@@ -1,9 +1,9 @@
 package mobile
 
 import (
+	"crypto/ed25519"
 	"encoding/hex"
 	"encoding/json"
-	"fmt"
 	"net"
 	"regexp"
 
@@ -12,12 +12,10 @@ import (
 	"github.com/yggdrasil-network/yggdrasil-go/src/address"
 	"github.com/yggdrasil-network/yggdrasil-go/src/config"
 	"github.com/yggdrasil-network/yggdrasil-go/src/core"
-	"github.com/yggdrasil-network/yggdrasil-go/src/defaults"
 	"github.com/yggdrasil-network/yggdrasil-go/src/ipv6rwc"
 	"github.com/yggdrasil-network/yggdrasil-go/src/multicast"
+	"github.com/yggdrasil-network/yggdrasil-go/src/tun"
 	"github.com/yggdrasil-network/yggdrasil-go/src/version"
-
-	_ "golang.org/x/mobile/bind"
 )
 
 // Yggdrasil mobile package is meant to "plug the gap" for mobile support, as
@@ -30,7 +28,9 @@ type Yggdrasil struct {
 	iprwc     *ipv6rwc.ReadWriteCloser
 	config    *config.NodeConfig
 	multicast *multicast.Multicast
+	tun       *tun.TunAdapter // optional
 	log       MobileLogger
+	logger    *log.Logger
 }
 
 // StartAutoconfigure starts a node with a randomly generated config
@@ -41,21 +41,28 @@ func (m *Yggdrasil) StartAutoconfigure() error {
 // StartJSON starts a node with the given JSON config. You can get JSON config
 // (rather than HJSON) by using the GenerateConfigJSON() function
 func (m *Yggdrasil) StartJSON(configjson []byte) error {
+	setMemLimitIfPossible()
+
 	logger := log.New(m.log, "", 0)
 	logger.EnableLevel("error")
 	logger.EnableLevel("warn")
 	logger.EnableLevel("info")
-	m.config = defaults.GenerateConfig()
+	m.logger = logger
-	if err := json.Unmarshal(configjson, &m.config); err != nil {
+	m.config = config.GenerateConfig()
+	if err := m.config.UnmarshalHJSON(configjson); err != nil {
 		return err
 	}
-	// Setup the Yggdrasil node itself.
+	// Set up the Yggdrasil node itself.
 	{
-		sk, err := hex.DecodeString(m.config.PrivateKey)
+		iprange := net.IPNet{
-		if err != nil {
+			IP:   net.ParseIP("200::"),
-			panic(err)
+			Mask: net.CIDRMask(7, 128),
+		}
+		options := []core.SetupOption{
+			core.PeerFilter(func(ip net.IP) bool {
+				return !iprange.Contains(ip)
+			}),
 		}
-		options := []core.SetupOption{}
 		for _, peer := range m.config.Peers {
 			options = append(options, core.Peer{URI: peer})
 		}
@@ -71,15 +78,24 @@ func (m *Yggdrasil) StartJSON(configjson []byte) error {
 			}
 			options = append(options, core.AllowedPublicKey(k[:]))
 		}
-		m.core, err = core.New(sk[:], logger, options...)
+		for _, lAddr := range m.config.Listen {
+			options = append(options, core.ListenAddress(lAddr))
+		}
+		var err error
+		m.core, err = core.New(m.config.Certificate, logger, options...)
 		if err != nil {
 			panic(err)
 		}
+		address, subnet := m.core.Address(), m.core.Subnet()
+		logger.Infof("Your public key is %s", hex.EncodeToString(m.core.PublicKey()))
+		logger.Infof("Your IPv6 address is %s", address.String())
+		logger.Infof("Your IPv6 subnet is %s", subnet.String())
 	}
 
-	// Setup the multicast module.
+	// Set up the multicast module.
 	if len(m.config.MulticastInterfaces) > 0 {
 		var err error
+		logger.Infof("Initializing multicast %s", "")
 		options := []multicast.SetupOption{}
 		for _, intf := range m.config.MulticastInterfaces {
 			options = append(options, multicast.MulticastInterface{
@@ -88,9 +104,11 @@ func (m *Yggdrasil) StartJSON(configjson []byte) error {
 				Listen:   intf.Listen,
 				Port:     intf.Port,
 				Priority: uint8(intf.Priority),
+				Password: intf.Password,
 			})
 		}
-		m.multicast, err = multicast.New(m.core, logger, options...)
+		logger.Infof("Starting multicast %s", "")
+		m.multicast, err = multicast.New(m.core, m.logger, options...)
 		if err != nil {
 			logger.Errorln("An error occurred starting multicast:", err)
 		}
@@ -151,10 +169,20 @@ func (m *Yggdrasil) RecvBuffer(buf []byte) (int, error) {
 func (m *Yggdrasil) Stop() error {
 	logger := log.New(m.log, "", 0)
 	logger.EnableLevel("info")
-	logger.Infof("Stop the mobile Yggdrasil instance %s", "")
+	logger.Infof("Stopping the mobile Yggdrasil instance %s", "")
-	if err := m.multicast.Stop(); err != nil {
+	if m.multicast != nil {
-		return err
+		logger.Infof("Stopping multicast %s", "")
+		if err := m.multicast.Stop(); err != nil {
+			return err
+		}
 	}
+	logger.Infof("Stopping TUN device %s", "")
+	if m.tun != nil {
+		if err := m.tun.Stop(); err != nil {
+			return err
+		}
+	}
+	logger.Infof("Stopping Yggdrasil core %s", "")
 	m.core.Stop()
 	return nil
 }
@@ -166,7 +194,7 @@ func (m *Yggdrasil) RetryPeersNow() {
 
 // GenerateConfigJSON generates mobile-friendly configuration in JSON format
 func GenerateConfigJSON() []byte {
-	nc := defaults.GenerateConfig()
+	nc := config.GenerateConfig()
 	nc.IfName = "none"
 	if json, err := json.Marshal(nc); err == nil {
 		return json
@@ -191,9 +219,9 @@ func (m *Yggdrasil) GetPublicKeyString() string {
 	return hex.EncodeToString(m.core.GetSelf().Key)
 }
 
-// GetCoordsString gets the node's coordinates
+// GetRoutingEntries gets the number of entries in the routing table
-func (m *Yggdrasil) GetCoordsString() string {
+func (m *Yggdrasil) GetRoutingEntries() int {
-	return fmt.Sprintf("%v", m.core.GetSelf().Coords)
+	return int(m.core.GetSelf().RoutingEntries)
 }
 
 func (m *Yggdrasil) GetPeersJSON() (result string) {
@@ -202,8 +230,11 @@ func (m *Yggdrasil) GetPeersJSON() (result string) {
 		IP string
 	}{}
 	for _, v := range m.core.GetPeers() {
-		a := address.AddrForKey(v.Key)
+		var ip string
-		ip := net.IP(a[:]).String()
+		if v.Key != nil {
+			a := address.AddrForKey(v.Key)
+			ip = net.IP(a[:]).String()
+		}
 		peers = append(peers, struct {
 			core.PeerInfo
 			IP string
@@ -219,8 +250,16 @@ func (m *Yggdrasil) GetPeersJSON() (result string) {
 	}
 }
 
-func (m *Yggdrasil) GetDHTJSON() (result string) {
+func (m *Yggdrasil) GetPathsJSON() (result string) {
-	if res, err := json.Marshal(m.core.GetDHT()); err == nil {
+	if res, err := json.Marshal(m.core.GetPaths()); err == nil {
+		return string(res)
+	} else {
+		return "{}"
+	}
+}
+
+func (m *Yggdrasil) GetTreeJSON() (result string) {
+	if res, err := json.Marshal(m.core.GetTree()); err == nil {
 		return string(res)
 	} else {
 		return "{}"
@@ -235,3 +274,28 @@ func (m *Yggdrasil) GetMTU() int {
 func GetVersion() string {
 	return version.BuildVersion()
 }
+
+type ConfigSummary struct {
+	PublicKey   string
+	IPv6Address string
+	IPv6Subnet  string
+}
+
+func SummaryForConfig(b []byte) *ConfigSummary {
+	cfg := config.GenerateConfig()
+	if err := cfg.UnmarshalHJSON(b); err != nil {
+		return nil
+	}
+	pub := ed25519.PrivateKey(cfg.PrivateKey).Public().(ed25519.PublicKey)
+	hpub := hex.EncodeToString(pub)
+	addr := net.IP(address.AddrForKey(pub)[:])
+	snet := net.IPNet{
+		IP:   append(address.SubnetForKey(pub)[:], 0, 0, 0, 0, 0, 0, 0, 0),
+		Mask: net.CIDRMask(64, 128),
+	}
+	return &ConfigSummary{
+		PublicKey:   hpub,
+		IPv6Address: addr.String(),
+		IPv6Subnet:  snet.String(),
+	}
+}

contrib/mobile/mobile_apple.go

@@ -1,5 +1,5 @@
-//go:build ios
+//go:build ios || darwin
-// +build ios
+// +build ios darwin
 
 package mobile
 
@@ -15,6 +15,8 @@ void Log(const char *text) {
 import "C"
 import (
 	"unsafe"
+
+	"github.com/yggdrasil-network/yggdrasil-go/src/tun"
 )
 
 type MobileLogger struct {
@@ -26,3 +28,13 @@ func (nsl MobileLogger) Write(p []byte) (n int, err error) {
 	C.Log(cstr)
 	return len(p), nil
 }
+
+func (m *Yggdrasil) TakeOverTUN(fd int32) error {
+	options := []tun.SetupOption{
+		tun.FileDescriptor(fd),
+		tun.InterfaceMTU(m.iprwc.MTU()),
+	}
+	var err error
+	m.tun, err = tun.New(m.iprwc, m.logger, options...)
+	return err
+}

contrib/mobile/mobile_mem_go120.go

@@ -0,0 +1,10 @@
+//go:build go1.20
+// +build go1.20
+
+package mobile
+
+import "runtime/debug"
+
+func setMemLimitIfPossible() {
+	debug.SetMemoryLimit(1024 * 1024 * 40)
+}

contrib/mobile/mobile_mem_other.go

@@ -0,0 +1,8 @@
+//go:build !go1.20
+// +build !go1.20
+
+package mobile
+
+func setMemLimitIfPossible() {
+	// not supported by this Go version
+}

contrib/mobile/mobile_other.go

@@ -1,5 +1,5 @@
-//go:build !android && !ios
+//go:build !android && !ios && !darwin
-// +build !android,!ios
+// +build !android,!ios,!darwin
 
 package mobile
 

contrib/mobile/mobile_test.go

@@ -1,15 +1,27 @@
 package mobile
 
-import "testing"
+import (
+	"os"
+	"testing"
+
+	"github.com/gologme/log"
+)
 
 func TestStartYggdrasil(t *testing.T) {
-	ygg := &Yggdrasil{}
+	logger := log.New(os.Stdout, "", 0)
+	logger.EnableLevel("error")
+	logger.EnableLevel("warn")
+	logger.EnableLevel("info")
+
+	ygg := &Yggdrasil{
+		logger: logger,
+	}
 	if err := ygg.StartAutoconfigure(); err != nil {
 		t.Fatalf("Failed to start Yggdrasil: %s", err)
 	}
 	t.Log("Address:", ygg.GetAddressString())
 	t.Log("Subnet:", ygg.GetSubnetString())
-	t.Log("Coords:", ygg.GetCoordsString())
+	t.Log("Routing entries:", ygg.GetRoutingEntries())
 	if err := ygg.Stop(); err != nil {
 		t.Fatalf("Failed to stop Yggdrasil: %s", err)
 	}

contrib/msi/build-msi.sh

@@ -1,7 +1,7 @@
 #!/bin/sh
 
 # This script generates an MSI file for Yggdrasil for a given architecture. It
-# needs to run on Windows within MSYS2 and Go 1.17 or later must be installed on
+# needs to run on Windows within MSYS2 and Go 1.21 or later must be installed on
 # the system and within the PATH. This is ran currently by GitHub Actions (see
 # the workflows in the repository).
 #
@@ -16,20 +16,7 @@ then
 fi
 
 # Download the wix tools!
-if [ ! -d wixbin ];
+dotnet tool install --global wix --version 5.0.0
-then
-  curl -LO https://wixtoolset.org/downloads/v3.14.0.3910/wix314-binaries.zip
-  if [ `md5sum wix314-binaries.zip | cut -f 1 -d " "` != "34f655cf108086838dd5a76d4318063b" ];
-  then
-    echo "wix package didn't match expected checksum"
-    exit 1
-  fi
-  mkdir -p wixbin
-  unzip -o wix314-binaries.zip -d wixbin || (
-    echo "failed to unzip WiX"
-    exit 1
-  )
-fi
 
 # Build Yggdrasil!
 [ "${PKGARCH}" == "x64" ] && GOOS=windows GOARCH=amd64 CGO_ENABLED=0 ./build
@@ -61,6 +48,11 @@ PKGVERSIONMS=$(echo $PKGVERSION | tr - .)
 if [ ! -d wintun ];
 then
   curl -o wintun.zip https://www.wintun.net/builds/wintun-0.14.1.zip
+  if [ `sha256sum wintun.zip | cut -f 1 -d " "` != "07c256185d6ee3652e09fa55c0b673e2624b565e02c4b9091c79ca7d2f24ef51" ];
+  then
+    echo "wintun package didn't match expected checksum"
+    exit 1
+  fi
   unzip wintun.zip
 fi
 if [ $PKGARCH = "x64" ]; then
@@ -101,7 +93,7 @@ cat > wix.xml << EOF
       Description="Yggdrasil Network Installer"
       Comments="Yggdrasil Network standalone router for Windows."
       Manufacturer="github.com/yggdrasil-network"
-      InstallerVersion="200"
+      InstallerVersion="500"
       InstallScope="perMachine"
       Languages="1033"
       Compressed="yes"
@@ -205,5 +197,5 @@ EOF
 # Generate the MSI
 CANDLEFLAGS="-nologo"
 LIGHTFLAGS="-nologo -spdb -sice:ICE71 -sice:ICE61"
-wixbin/candle $CANDLEFLAGS -out ${PKGNAME}-${PKGVERSION}-${PKGARCH}.wixobj -arch ${PKGARCH} wix.xml && \
+candle $CANDLEFLAGS -out ${PKGNAME}-${PKGVERSION}-${PKGARCH}.wixobj -arch ${PKGARCH} wix.xml && \
-wixbin/light $LIGHTFLAGS -ext WixUtilExtension.dll -out ${PKGNAME}-${PKGVERSION}-${PKGARCH}.msi ${PKGNAME}-${PKGVERSION}-${PKGARCH}.wixobj
+light $LIGHTFLAGS -ext WixUtilExtension.dll -out ${PKGNAME}-${PKGVERSION}-${PKGARCH}.msi ${PKGNAME}-${PKGVERSION}-${PKGARCH}.wixobj

contrib/openrc/yggdrasil

@@ -6,7 +6,6 @@ CONFFILE="/etc/yggdrasil.conf"
 pidfile="/run/${RC_SVCNAME}.pid"
 
 command="/usr/bin/yggdrasil"
-extra_started_commands="reload"
 
 depend() {
 	use net dns logger
@@ -42,12 +41,6 @@ start() {
 	eend $?
 }
 
-reload() {
-	ebegin "Reloading ${RC_SVCNAME}"
-	start-stop-daemon --signal HUP --pidfile "${pidfile}"
-	eend $?
-}
-
 stop() {
 	ebegin "Stopping ${RC_SVCNAME}"
 	start-stop-daemon --stop --pidfile "${pidfile}" --exec "${command}"

contrib/systemd/yggdrasil-default-config.service.debian

@@ -0,0 +1,13 @@
+[Unit]
+Description=Yggdrasil default config generator
+ConditionPathExists=|!/etc/yggdrasil/yggdrasil.conf
+ConditionFileNotEmpty=|!/etc/yggdrasil/yggdrasil.conf
+Wants=local-fs.target
+After=local-fs.target
+
+[Service]
+Type=oneshot
+Group=yggdrasil
+ExecStartPre=/usr/bin/mkdir -p /etc/yggdrasil
+ExecStart=/usr/bin/yggdrasil -genconf > /etc/yggdrasil/yggdrasil.conf
+ExecStartPost=/usr/bin/chmod -R 0640 /etc/yggdrasil

contrib/systemd/yggdrasil.service.debian

@@ -0,0 +1,25 @@
+[Unit]
+Description=Yggdrasil Network
+Wants=network-online.target
+Wants=yggdrasil-default-config.service
+After=network-online.target
+After=yggdrasil-default-config.service
+
+[Service]
+Group=yggdrasil
+ProtectHome=true
+ProtectSystem=strict
+NoNewPrivileges=true
+RuntimeDirectory=yggdrasil
+ReadWritePaths=/var/run/yggdrasil/ /run/yggdrasil/
+SyslogIdentifier=yggdrasil
+CapabilityBoundingSet=CAP_NET_ADMIN CAP_NET_BIND_SERVICE
+AmbientCapabilities=CAP_NET_ADMIN CAP_NET_BIND_SERVICE
+ExecStartPre=+-/sbin/modprobe tun
+ExecStart=/usr/bin/yggdrasil -useconffile /etc/yggdrasil/yggdrasil.conf
+ExecReload=/bin/kill -HUP $MAINPID
+Restart=always
+TimeoutStopSec=5
+
+[Install]
+WantedBy=multi-user.target

go.mod

@@ -1,38 +1,49 @@
 module github.com/yggdrasil-network/yggdrasil-go
 
-go 1.17
+go 1.22
 
 require (
-	github.com/Arceliar/ironwood v0.0.0-20221115123222-ec61cea2f439
+	github.com/Arceliar/ironwood v0.0.0-20241213013129-743fe2fccbd3
-	github.com/Arceliar/phony v0.0.0-20210209235338-dde1a8dca979
+	github.com/Arceliar/phony v0.0.0-20220903101357-530938a4b13d
-	github.com/cheggaaa/pb/v3 v3.0.8
+	github.com/cheggaaa/pb/v3 v3.1.5
-	github.com/gologme/log v1.2.0
+	github.com/coder/websocket v1.8.12
+	github.com/gologme/log v1.3.0
 	github.com/hashicorp/go-syslog v1.0.0
-	github.com/hjson/hjson-go v3.1.0+incompatible
+	github.com/hjson/hjson-go/v4 v4.4.0
 	github.com/kardianos/minwinsvc v1.0.2
-	github.com/mitchellh/mapstructure v1.4.1
+	github.com/quic-go/quic-go v0.48.2
-	github.com/vishvananda/netlink v1.1.0
+	github.com/vishvananda/netlink v1.3.0
-	golang.org/x/mobile v0.0.0-20221110043201-43a038452099
+	github.com/wlynxg/anet v0.0.5
-	golang.org/x/net v0.0.0-20221014081412-f15817d10f9b
+	golang.org/x/crypto v0.33.0
-	golang.org/x/sys v0.0.0-20221013171732-95e765b1cc43
+	golang.org/x/net v0.35.0
-	golang.org/x/text v0.3.8
+	golang.org/x/sys v0.30.0
-	golang.zx2c4.com/wireguard v0.0.0-20211017052713-f87e87af0d9a
+	golang.org/x/text v0.22.0
-	golang.zx2c4.com/wireguard/windows v0.4.12
+	golang.zx2c4.com/wintun v0.0.0-20230126152724-0fa3db229ce2
+	golang.zx2c4.com/wireguard v0.0.0-20231211153847-12269c276173
+	golang.zx2c4.com/wireguard/windows v0.5.3
 )
 
 require (
-	github.com/mattn/go-colorable v0.1.8 // indirect
+	github.com/bits-and-blooms/bitset v1.13.0 // indirect
+	github.com/bits-and-blooms/bloom/v3 v3.7.0 // indirect
+	github.com/go-task/slim-sprig v0.0.0-20230315185526-52ccab3ef572 // indirect
+	github.com/google/pprof v0.0.0-20210407192527-94a9f03dee38 // indirect
+	github.com/mattn/go-colorable v0.1.13 // indirect
+	github.com/onsi/ginkgo/v2 v2.9.5 // indirect
 	github.com/rivo/uniseg v0.2.0 // indirect
-	golang.org/x/crypto v0.0.0-20221012134737-56aed061732a // indirect
+	go.uber.org/mock v0.5.0 // indirect
-	golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4 // indirect
+	golang.org/x/exp v0.0.0-20240719175910-8a7402abbf56 // indirect
-	golang.org/x/tools v0.1.12 // indirect
+	golang.org/x/mod v0.19.0 // indirect
+	golang.org/x/sync v0.11.0 // indirect
+	golang.org/x/tools v0.23.0 // indirect
 )
 
 require (
 	github.com/VividCortex/ewma v1.2.0 // indirect
-	github.com/fatih/color v1.12.0 // indirect
+	github.com/fatih/color v1.18.0 // indirect
-	github.com/mattn/go-isatty v0.0.13 // indirect
+	github.com/mattn/go-isatty v0.0.20 // indirect
-	github.com/mattn/go-runewidth v0.0.13 // indirect
+	github.com/mattn/go-runewidth v0.0.16 // indirect
 	github.com/olekukonko/tablewriter v0.0.5
-	github.com/vishvananda/netns v0.0.0-20210104183010-2eb08e3e575f // indirect
+	github.com/vishvananda/netns v0.0.5 // indirect
+	suah.dev/protect v1.2.4
 )

go.sum

@@ -1,120 +1,119 @@
-github.com/Arceliar/ironwood v0.0.0-20221115123222-ec61cea2f439 h1:eOW6/XIs06TnUn9GPCnfv71CQZw8edP3u3mH3lZt6iM=
+github.com/Arceliar/ironwood v0.0.0-20241213013129-743fe2fccbd3 h1:d8N0z+udAnbU5PdjpLSNPTWlqeU/nnYsQ42B6+879aw=
-github.com/Arceliar/ironwood v0.0.0-20221115123222-ec61cea2f439/go.mod h1:RP72rucOFm5udrnEzTmIWLRVGQiV/fSUAQXJ0RST/nk=
+github.com/Arceliar/ironwood v0.0.0-20241213013129-743fe2fccbd3/go.mod h1:SrrElc3FFMpYCODSr11jWbLFeOM8WsY+DbDY/l2AXF0=
-github.com/Arceliar/phony v0.0.0-20210209235338-dde1a8dca979 h1:WndgpSW13S32VLQ3ugUxx2EnnWmgba1kCqPkd4Gk1yQ=
+github.com/Arceliar/phony v0.0.0-20220903101357-530938a4b13d h1:UK9fsWbWqwIQkMCz1CP+v5pGbsGoWAw6g4AyvMpm1EM=
-github.com/Arceliar/phony v0.0.0-20210209235338-dde1a8dca979/go.mod h1:6Lkn+/zJilRMsKmbmG1RPoamiArC6HS73xbwRyp3UyI=
+github.com/Arceliar/phony v0.0.0-20220903101357-530938a4b13d/go.mod h1:BCnxhRf47C/dy/e/D2pmB8NkB3dQVIrkD98b220rx5Q=
-github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
-github.com/VividCortex/ewma v1.1.1/go.mod h1:2Tkkvm3sRDVXaiyucHiACn4cqf7DpdyLvmxzcbUokwA=
 github.com/VividCortex/ewma v1.2.0 h1:f58SaIzcDXrSy3kWaHNvuJgJ3Nmz59Zji6XoJR/q1ow=
 github.com/VividCortex/ewma v1.2.0/go.mod h1:nz4BbCtbLyFDeC9SUHbtcT5644juEuWfUAUnGx7j5l4=
-github.com/cheggaaa/pb/v3 v3.0.8 h1:bC8oemdChbke2FHIIGy9mn4DPJ2caZYQnfbRqwmdCoA=
+github.com/bits-and-blooms/bitset v1.10.0/go.mod h1:7hO7Gc7Pp1vODcmWvKMRA9BNmbv6a/7QIWpPxHddWR8=
-github.com/cheggaaa/pb/v3 v3.0.8/go.mod h1:UICbiLec/XO6Hw6k+BHEtHeQFzzBH4i2/qk/ow1EJTA=
+github.com/bits-and-blooms/bitset v1.13.0 h1:bAQ9OPNFYbGHV6Nez0tmNI0RiEu7/hxlYJRUA0wFAVE=
-github.com/fatih/color v1.10.0/go.mod h1:ELkj/draVOlAH/xkhN6mQ50Qd0MPOk5AAr3maGEBuJM=
+github.com/bits-and-blooms/bitset v1.13.0/go.mod h1:7hO7Gc7Pp1vODcmWvKMRA9BNmbv6a/7QIWpPxHddWR8=
-github.com/fatih/color v1.12.0 h1:mRhaKNwANqRgUBGKmnI5ZxEk7QXmjQeCcuYFMX2bfcc=
+github.com/bits-and-blooms/bloom/v3 v3.7.0 h1:VfknkqV4xI+PsaDIsoHueyxVDZrfvMn56jeWUzvzdls=
-github.com/fatih/color v1.12.0/go.mod h1:ELkj/draVOlAH/xkhN6mQ50Qd0MPOk5AAr3maGEBuJM=
+github.com/bits-and-blooms/bloom/v3 v3.7.0/go.mod h1:VKlUSvp0lFIYqxJjzdnSsZEw4iHb1kOL2tfHTgyJBHg=
-github.com/gologme/log v1.2.0 h1:Ya5Ip/KD6FX7uH0S31QO87nCCSucKtF44TLbTtO7V4c=
+github.com/cheggaaa/pb/v3 v3.1.5 h1:QuuUzeM2WsAqG2gMqtzaWithDJv0i+i6UlnwSCI4QLk=
-github.com/gologme/log v1.2.0/go.mod h1:gq31gQ8wEHkR+WekdWsqDuf8pXTUZA9BnnzTuPz1Y9U=
+github.com/cheggaaa/pb/v3 v3.1.5/go.mod h1:CrxkeghYTXi1lQBEI7jSn+3svI3cuc19haAj6jM60XI=
+github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI=
+github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5PlCu98SY8svDHJxuZscDgtXS6KTTbou5AhLI=
+github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMnBNeIyt5eFwwo7qiLfzFZmjNmxjkiQlU=
+github.com/coder/websocket v1.8.12 h1:5bUXkEPPIbewrnkU8LTCLVaxi4N4J8ahufH2vlo4NAo=
+github.com/coder/websocket v1.8.12/go.mod h1:LNVeNrXQZfe5qhS9ALED3uA+l5pPqvwXg3CKoDBB2gs=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/fatih/color v1.18.0 h1:S8gINlzdQ840/4pfAwic/ZE0djQEH3wM94VfqLTZcOM=
+github.com/fatih/color v1.18.0/go.mod h1:4FelSpRwEGDpQ12mAdzqdOukCy4u8WUtOY6lkT/6HfU=
+github.com/go-logr/logr v1.2.4 h1:g01GSCwiDw2xSZfjJ2/T9M+S6pFdcNtFYsp+Y43HYDQ=
+github.com/go-logr/logr v1.2.4/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
+github.com/go-task/slim-sprig v0.0.0-20230315185526-52ccab3ef572 h1:tfuBGBXKqDEevZMzYi5KSi8KkcZtzBcTgAUUtapy0OI=
+github.com/go-task/slim-sprig v0.0.0-20230315185526-52ccab3ef572/go.mod h1:9Pwr4B2jHnOSGXyyzV8ROjYa2ojvAY6HCGYYfMoC3Ls=
+github.com/golang/protobuf v1.5.3 h1:KhyjKVUg7Usr/dYsdSqoFveMYd5ko72D+zANwlG1mmg=
+github.com/golang/protobuf v1.5.3/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
+github.com/gologme/log v1.3.0 h1:l781G4dE+pbigClDSDzSaaYKtiueHCILUa/qSDsmHAo=
+github.com/gologme/log v1.3.0/go.mod h1:yKT+DvIPdDdDoPtqFrFxheooyVmoqi0BAsw+erN3wA4=
+github.com/google/btree v1.0.1 h1:gK4Kx5IaGY9CD5sPJ36FHiBJ6ZXl0kilRiiCj+jdYp4=
+github.com/google/btree v1.0.1/go.mod h1:xXMiIv4Fb/0kKde4SpL7qlzvu5cMJDRkFDxJfI9uaxA=
+github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
+github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
+github.com/google/pprof v0.0.0-20210407192527-94a9f03dee38 h1:yAJXTCF9TqKcTiHJAE8dj7HMvPfh66eeA2JYW7eFpSE=
+github.com/google/pprof v0.0.0-20210407192527-94a9f03dee38/go.mod h1:kpwsk12EmLew5upagYY7GY0pfYCcupk39gWOCRROcvE=
 github.com/hashicorp/go-syslog v1.0.0 h1:KaodqZuhUoZereWVIYmpUgZysurB1kBLX2j0MwMrUAE=
 github.com/hashicorp/go-syslog v1.0.0/go.mod h1:qPfqrKkXGihmCqbJM2mZgkZGvKG1dFdvsLplgctolz4=
-github.com/hjson/hjson-go v3.1.0+incompatible h1:DY/9yE8ey8Zv22bY+mHV1uk2yRy0h8tKhZ77hEdi0Aw=
+github.com/hjson/hjson-go/v4 v4.4.0 h1:D/NPvqOCH6/eisTb5/ztuIS8GUvmpHaLOcNk1Bjr298=
-github.com/hjson/hjson-go v3.1.0+incompatible/go.mod h1:qsetwF8NlsTsOTwZTApNlTCerV+b2GjYRRcIk4JMFio=
+github.com/hjson/hjson-go/v4 v4.4.0/go.mod h1:KaYt3bTw3zhBjYqnXkYywcYctk0A2nxeEFTse3rH13E=
+github.com/ianlancetaylor/demangle v0.0.0-20200824232613-28f6c0f3b639/go.mod h1:aSSvb/t6k1mPoxDqO4vJh6VOCGPwU4O0C2/Eqndh1Sc=
 github.com/kardianos/minwinsvc v1.0.2 h1:JmZKFJQrmTGa/WiW+vkJXKmfzdjabuEW4Tirj5lLdR0=
 github.com/kardianos/minwinsvc v1.0.2/go.mod h1:LUZNYhNmxujx2tR7FbdxqYJ9XDDoCd3MQcl1o//FWl4=
-github.com/lxn/walk v0.0.0-20210112085537-c389da54e794/go.mod h1:E23UucZGqpuUANJooIbHWCufXvOcT6E7Stq81gU+CSQ=
+github.com/mattn/go-colorable v0.1.13 h1:fFA4WZxdEF4tXPZVKMLwD8oUnCTTo08duU7wxecdEvA=
-github.com/lxn/win v0.0.0-20210218163916-a377121e959e/go.mod h1:KxxjdtRkfNoYDCUP5ryK7XJJNTnpC8atvtmTheChOtk=
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-github.com/mattn/go-colorable v0.1.8 h1:c1ghPdyEDarC70ftn0y+A/Ee++9zz8ljHG1b13eJ0s8=
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-github.com/mattn/go-colorable v0.1.8/go.mod h1:u6P/XSegPjTcexA+o6vUJrdnUu04hMope9wVRipJSqc=
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-github.com/mattn/go-isatty v0.0.12/go.mod h1:cbi8OIDigv2wuxKPP5vlRcQ1OAZbq2CE4Kysco4FUpU=
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 github.com/mattn/go-runewidth v0.0.9/go.mod h1:H031xJmbD/WCDINGzjvQ9THkh0rPKHF+m2gUSrubnMI=
-github.com/mattn/go-runewidth v0.0.12/go.mod h1:RAqKPSqVFrSLVXbA8x7dzmKdmGzieGRCM46jaSJTDAk=
+github.com/mattn/go-runewidth v0.0.16 h1:E5ScNMtiwvlvB5paMFdw9p4kSQzbXFikJ5SQO6TULQc=
-github.com/mattn/go-runewidth v0.0.13 h1:lTGmDsbAYt5DmK6OnoV7EuIF1wEIFAcxld6ypU4OSgU=
+github.com/mattn/go-runewidth v0.0.16/go.mod h1:Jdepj2loyihRzMpdS35Xk/zdY8IAYHsh153qUoGf23w=
-github.com/mattn/go-runewidth v0.0.13/go.mod h1:Jdepj2loyihRzMpdS35Xk/zdY8IAYHsh153qUoGf23w=
-github.com/mitchellh/mapstructure v1.4.1 h1:CpVNEelQCZBooIPDn+AR3NpivK/TIKU8bDxdASFVQag=
-github.com/mitchellh/mapstructure v1.4.1/go.mod h1:bFUtVrKA4DC2yAKiSyO/QUcy7e+RRV2QTWOzhPopBRo=
 github.com/olekukonko/tablewriter v0.0.5 h1:P2Ga83D34wi1o9J6Wh1mRuqd4mF/x/lgBS7N7AbDhec=
 github.com/olekukonko/tablewriter v0.0.5/go.mod h1:hPp6KlRPjbx+hW8ykQs1w3UBbZlj6HuIJcUGPhkA7kY=
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-golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
-golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
-golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
-golang.org/x/text v0.3.8-0.20211004125949-5bd84dd9b33b/go.mod h1:EFNZuWvGYxIRUEX+K8UmCFwYmZjqcrnq15ZuVldZkZ0=
-golang.org/x/text v0.3.8 h1:nAL+RVCQ9uMn3vJZbV+MRnydTJFPf8qqY42YiA6MrqY=
-golang.org/x/text v0.3.8/go.mod h1:E6s5w1FMmriuDzIBO73fBruAKo1PCIq6d2Q6DHfQ8WQ=
-golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
-golang.org/x/tools v0.0.0-20190312151545-0bb0c0a6e846/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
-golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
-golang.org/x/tools v0.1.7/go.mod h1:LGqMHiF4EqQNHR1JncWGqT5BVaXmza+X+BDGol+dOxo=
-golang.org/x/tools v0.1.12 h1:VveCTK38A2rkS8ZqFY25HIDFscX5X9OoEhJd3quQmXU=
-golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
-golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-golang.zx2c4.com/wireguard v0.0.0-20211012062646-82d2aa87aa62/go.mod h1:id8Oh3eCCmpj9uVGWVjsUAl6UPX5ysMLzu6QxJU2UOU=
-golang.zx2c4.com/wireguard v0.0.0-20211017052713-f87e87af0d9a h1:tTbyylK9/D3u/wEP26Vx7L700UpY48nhioJWZM1vhZw=
-golang.zx2c4.com/wireguard v0.0.0-20211017052713-f87e87af0d9a/go.mod h1:id8Oh3eCCmpj9uVGWVjsUAl6UPX5ysMLzu6QxJU2UOU=
-golang.zx2c4.com/wireguard/windows v0.4.12 h1:CUmbdWKVNzTSsVb4yUAiEwL3KsabdJkEPdDjCHxBlhA=
-golang.zx2c4.com/wireguard/windows v0.4.12/go.mod h1:PW4y+d9oY83XU9rRwRwrJDwEMuhVjMxu2gfD1cfzS7w=

src/address/address.go

@@ -113,7 +113,7 @@ func SubnetForKey(publicKey ed25519.PublicKey) *Subnet {
 	return &snet
 }
 
-// GetKet returns the partial ed25519.PublicKey for the Address.
+// GetKey returns the partial ed25519.PublicKey for the Address.
 // This is used for key lookup.
 func (a *Address) GetKey() ed25519.PublicKey {
 	var key [ed25519.PublicKeySize]byte
@@ -141,7 +141,7 @@ func (a *Address) GetKey() ed25519.PublicKey {
 	return ed25519.PublicKey(key[:])
 }
 
-// GetKet returns the partial ed25519.PublicKey for the Subnet.
+// GetKey returns the partial ed25519.PublicKey for the Subnet.
 // This is used for key lookup.
 func (s *Subnet) GetKey() ed25519.PublicKey {
 	var addr Address

src/address/address_test.go

@@ -3,13 +3,13 @@ package address
 import (
 	"bytes"
 	"crypto/ed25519"
-	"math/rand"
+	"crypto/rand"
 	"testing"
 )
 
 func TestAddress_Address_IsValid(t *testing.T) {
 	var address Address
-	rand.Read(address[:])
+	_, _ = rand.Read(address[:])
 
 	address[0] = 0
 
@@ -32,7 +32,7 @@ func TestAddress_Address_IsValid(t *testing.T) {
 
 func TestAddress_Subnet_IsValid(t *testing.T) {
 	var subnet Subnet
-	rand.Read(subnet[:])
+	_, _ = rand.Read(subnet[:])
 
 	subnet[0] = 0
 

src/admin/addpeer.go

@@ -1,5 +1,10 @@
 package admin
 
+import (
+	"fmt"
+	"net/url"
+)
+
 type AddPeerRequest struct {
 	Uri   string `json:"uri"`
 	Sintf string `json:"interface,omitempty"`
@@ -7,6 +12,10 @@ type AddPeerRequest struct {
 
 type AddPeerResponse struct{}
 
-func (a *AdminSocket) addPeerHandler(req *AddPeerRequest, res *AddPeerResponse) error {
+func (a *AdminSocket) addPeerHandler(req *AddPeerRequest, _ *AddPeerResponse) error {
-	return a.core.AddPeer(req.Uri, req.Sintf)
+	u, err := url.Parse(req.Uri)
+	if err != nil {
+		return fmt.Errorf("unable to parse peering URI: %w", err)
+	}
+	return a.core.AddPeer(u, req.Sintf)
 }

src/admin/admin.go

@@ -35,10 +35,10 @@ type AdminSocketRequest struct {
 }
 
 type AdminSocketResponse struct {
-	Status   string          `json:"status"`
+	Status   string             `json:"status"`
-	Error    string          `json:"error,omitempty"`
+	Error    string             `json:"error,omitempty"`
-	Request  json.RawMessage `json:"request"`
+	Request  AdminSocketRequest `json:"request"`
-	Response json.RawMessage `json:"response"`
+	Response json.RawMessage    `json:"response"`
 }
 
 type handler struct {
@@ -83,6 +83,52 @@ func New(c *core.Core, log core.Logger, opts ...SetupOption) (*AdminSocket, erro
 	if a.config.listenaddr == "none" || a.config.listenaddr == "" {
 		return nil, nil
 	}
+
+	listenaddr := string(a.config.listenaddr)
+	u, err := url.Parse(listenaddr)
+	if err == nil {
+		switch strings.ToLower(u.Scheme) {
+		case "unix":
+			if _, err := os.Stat(u.Path); err == nil {
+				a.log.Debugln("Admin socket", u.Path, "already exists, trying to clean up")
+				if _, err := net.DialTimeout("unix", u.Path, time.Second*2); err == nil || err.(net.Error).Timeout() {
+					a.log.Errorln("Admin socket", u.Path, "already exists and is in use by another process")
+					os.Exit(1)
+				} else {
+					if err := os.Remove(u.Path); err == nil {
+						a.log.Debugln(u.Path, "was cleaned up")
+					} else {
+						a.log.Errorln(u.Path, "already exists and was not cleaned up:", err)
+						os.Exit(1)
+					}
+				}
+			}
+			a.listener, err = net.Listen("unix", u.Path)
+			if err == nil {
+				switch u.Path[:1] {
+				case "@": // maybe abstract namespace
+				default:
+					if err := os.Chmod(u.Path, 0660); err != nil {
+						a.log.Warnln("WARNING:", u.Path, "may have unsafe permissions!")
+					}
+				}
+			}
+		case "tcp":
+			a.listener, err = net.Listen("tcp", u.Host)
+		default:
+			a.listener, err = net.Listen("tcp", listenaddr)
+		}
+	} else {
+		a.listener, err = net.Listen("tcp", listenaddr)
+	}
+	if err != nil {
+		a.log.Errorf("Admin socket failed to listen: %v", err)
+		os.Exit(1)
+	}
+	a.log.Infof("%s admin socket listening on %s",
+		strings.ToUpper(a.listener.Addr().Network()),
+		a.listener.Addr().String())
+
 	_ = a.AddHandler("list", "List available commands", []string{}, func(_ json.RawMessage) (interface{}, error) {
 		res := &ListResponse{}
 		for name, handler := range a.handlers {
@@ -132,14 +178,14 @@ func (a *AdminSocket) SetupAdminHandlers() {
 		},
 	)
 	_ = a.AddHandler(
-		"getDHT", "Show known DHT entries", []string{},
+		"getTree", "Show known Tree entries", []string{},
 		func(in json.RawMessage) (interface{}, error) {
-			req := &GetDHTRequest{}
+			req := &GetTreeRequest{}
-			res := &GetDHTResponse{}
+			res := &GetTreeResponse{}
 			if err := json.Unmarshal(in, &req); err != nil {
 				return nil, err
 			}
-			if err := a.getDHTHandler(req, res); err != nil {
+			if err := a.getTreeHandler(req, res); err != nil {
 				return nil, err
 			}
 			return res, nil
@@ -201,10 +247,6 @@ func (a *AdminSocket) SetupAdminHandlers() {
 			return res, nil
 		},
 	)
-	//_ = a.AddHandler("getNodeInfo", []string{"key"}, t.proto.nodeinfo.nodeInfoAdminHandler)
-	//_ = a.AddHandler("debug_remoteGetSelf", []string{"key"}, t.proto.getSelfHandler)
-	//_ = a.AddHandler("debug_remoteGetPeers", []string{"key"}, t.proto.getPeersHandler)
-	//_ = a.AddHandler("debug_remoteGetDHT", []string{"key"}, t.proto.getDHTHandler)
 }
 
 // IsStarted returns true if the module has been started.
@@ -237,51 +279,6 @@ func (a *AdminSocket) Stop() error {
 
 // listen is run by start and manages API connections.
 func (a *AdminSocket) listen() {
-	listenaddr := string(a.config.listenaddr)
-	u, err := url.Parse(listenaddr)
-	if err == nil {
-		switch strings.ToLower(u.Scheme) {
-		case "unix":
-			if _, err := os.Stat(listenaddr[7:]); err == nil {
-				a.log.Debugln("Admin socket", listenaddr[7:], "already exists, trying to clean up")
-				if _, err := net.DialTimeout("unix", listenaddr[7:], time.Second*2); err == nil || err.(net.Error).Timeout() {
-					a.log.Errorln("Admin socket", listenaddr[7:], "already exists and is in use by another process")
-					os.Exit(1)
-				} else {
-					if err := os.Remove(listenaddr[7:]); err == nil {
-						a.log.Debugln(listenaddr[7:], "was cleaned up")
-					} else {
-						a.log.Errorln(listenaddr[7:], "already exists and was not cleaned up:", err)
-						os.Exit(1)
-					}
-				}
-			}
-			a.listener, err = net.Listen("unix", listenaddr[7:])
-			if err == nil {
-				switch listenaddr[7:8] {
-				case "@": // maybe abstract namespace
-				default:
-					if err := os.Chmod(listenaddr[7:], 0660); err != nil {
-						a.log.Warnln("WARNING:", listenaddr[:7], "may have unsafe permissions!")
-					}
-				}
-			}
-		case "tcp":
-			a.listener, err = net.Listen("tcp", u.Host)
-		default:
-			// err = errors.New(fmt.Sprint("protocol not supported: ", u.Scheme))
-			a.listener, err = net.Listen("tcp", listenaddr)
-		}
-	} else {
-		a.listener, err = net.Listen("tcp", listenaddr)
-	}
-	if err != nil {
-		a.log.Errorf("Admin socket failed to listen: %v", err)
-		os.Exit(1)
-	}
-	a.log.Infof("%s admin socket listening on %s",
-		strings.ToUpper(a.listener.Addr().Network()),
-		a.listener.Addr().String())
 	defer a.listener.Close()
 	for {
 		conn, err := a.listener.Accept()
@@ -309,19 +306,6 @@ func (a *AdminSocket) handleRequest(conn net.Conn) {
 
 	defer conn.Close()
 
-	defer func() {
-		r := recover()
-		if r != nil {
-			a.log.Debugln("Admin socket error:", r)
-			if err := encoder.Encode(&ErrorResponse{
-				Error: "Check your syntax and input types",
-			}); err != nil {
-				a.log.Debugln("Admin socket JSON encode error:", err)
-			}
-			conn.Close()
-		}
-	}()
-
 	for {
 		var err error
 		var buf json.RawMessage
@@ -335,6 +319,7 @@ func (a *AdminSocket) handleRequest(conn net.Conn) {
 			if err = json.Unmarshal(buf, &req); err != nil {
 				return fmt.Errorf("Failed to unmarshal request")
 			}
+			resp.Request = req
 			if req.Name == "" {
 				return fmt.Errorf("No request specified")
 			}
@@ -371,13 +356,15 @@ type DataUnit uint64
 
 func (d DataUnit) String() string {
 	switch {
-	case d > 1024*1024*1024*1024:
+	case d >= 1024*1024*1024*1024:
-		return fmt.Sprintf("%2.ftb", float64(d)/1024/1024/1024/1024)
+		return fmt.Sprintf("%2.1fTB", float64(d)/1024/1024/1024/1024)
-	case d > 1024*1024*1024:
+	case d >= 1024*1024*1024:
-		return fmt.Sprintf("%2.fgb", float64(d)/1024/1024/1024)
+		return fmt.Sprintf("%2.1fGB", float64(d)/1024/1024/1024)
-	case d > 1024*1024:
+	case d >= 1024*1024:
-		return fmt.Sprintf("%2.fmb", float64(d)/1024/1024)
+		return fmt.Sprintf("%2.1fMB", float64(d)/1024/1024)
+	case d >= 100:
+		return fmt.Sprintf("%2.1fKB", float64(d)/1024)
 	default:
-		return fmt.Sprintf("%2.fkb", float64(d)/1024)
+		return fmt.Sprintf("%dB", d)
 	}
 }

src/admin/getdht.go

@@ -1,41 +0,0 @@
-package admin
-
-import (
-	"encoding/hex"
-	"net"
-	"sort"
-	"strings"
-
-	"github.com/yggdrasil-network/yggdrasil-go/src/address"
-)
-
-type GetDHTRequest struct{}
-
-type GetDHTResponse struct {
-	DHT []DHTEntry `json:"dht"`
-}
-
-type DHTEntry struct {
-	IPAddress string `json:"address"`
-	PublicKey string `json:"key"`
-	Port      uint64 `json:"port"`
-	Rest      uint64 `json:"rest"`
-}
-
-func (a *AdminSocket) getDHTHandler(req *GetDHTRequest, res *GetDHTResponse) error {
-	dht := a.core.GetDHT()
-	res.DHT = make([]DHTEntry, 0, len(dht))
-	for _, d := range dht {
-		addr := address.AddrForKey(d.Key)
-		res.DHT = append(res.DHT, DHTEntry{
-			IPAddress: net.IP(addr[:]).String(),
-			PublicKey: hex.EncodeToString(d.Key[:]),
-			Port:      d.Port,
-			Rest:      d.Rest,
-		})
-	}
-	sort.SliceStable(res.DHT, func(i, j int) bool {
-		return strings.Compare(res.DHT[i].PublicKey, res.DHT[j].PublicKey) < 0
-	})
-	return nil
-}

src/admin/getpaths.go

@@ -3,7 +3,7 @@ package admin
 import (
 	"encoding/hex"
 	"net"
-	"sort"
+	"slices"
 	"strings"
 
 	"github.com/yggdrasil-network/yggdrasil-go/src/address"
@@ -20,9 +20,10 @@ type PathEntry struct {
 	IPAddress string   `json:"address"`
 	PublicKey string   `json:"key"`
 	Path      []uint64 `json:"path"`
+	Sequence  uint64   `json:"sequence"`
 }
 
-func (a *AdminSocket) getPathsHandler(req *GetPathsRequest, res *GetPathsResponse) error {
+func (a *AdminSocket) getPathsHandler(_ *GetPathsRequest, res *GetPathsResponse) error {
 	paths := a.core.GetPaths()
 	res.Paths = make([]PathEntry, 0, len(paths))
 	for _, p := range paths {
@@ -31,10 +32,11 @@ func (a *AdminSocket) getPathsHandler(req *GetPathsRequest, res *GetPathsRespons
 			IPAddress: net.IP(addr[:]).String(),
 			PublicKey: hex.EncodeToString(p.Key),
 			Path:      p.Path,
+			Sequence:  p.Sequence,
 		})
 	}
-	sort.SliceStable(res.Paths, func(i, j int) bool {
+	slices.SortStableFunc(res.Paths, func(a, b PathEntry) int {
-		return strings.Compare(res.Paths[i].PublicKey, res.Paths[j].PublicKey) < 0
+		return strings.Compare(a.PublicKey, b.PublicKey)
 	})
 	return nil
 }

src/admin/getpeers.go

@@ -3,7 +3,9 @@ package admin
 import (
 	"encoding/hex"
 	"net"
-	"sort"
+	"slices"
+	"strings"
+	"time"
 
 	"github.com/yggdrasil-network/yggdrasil-go/src/address"
 )
@@ -16,39 +18,74 @@ type GetPeersResponse struct {
 }
 
 type PeerEntry struct {
-	IPAddress string   `json:"address"`
+	URI           string        `json:"remote,omitempty"`
-	PublicKey string   `json:"key"`
+	Up            bool          `json:"up"`
-	Port      uint64   `json:"port"`
+	Inbound       bool          `json:"inbound"`
-	Priority  uint64   `json:"priority"`
+	IPAddress     string        `json:"address,omitempty"`
-	Coords    []uint64 `json:"coords"`
+	PublicKey     string        `json:"key"`
-	Remote    string   `json:"remote"`
+	Port          uint64        `json:"port"`
-	RXBytes   DataUnit `json:"bytes_recvd"`
+	Priority      uint64        `json:"priority"`
-	TXBytes   DataUnit `json:"bytes_sent"`
+	Cost          uint64        `json:"cost"`
-	Uptime    float64  `json:"uptime"`
+	RXBytes       DataUnit      `json:"bytes_recvd,omitempty"`
+	TXBytes       DataUnit      `json:"bytes_sent,omitempty"`
+	RXRate        DataUnit      `json:"rate_recvd,omitempty"`
+	TXRate        DataUnit      `json:"rate_sent,omitempty"`
+	Uptime        float64       `json:"uptime,omitempty"`
+	Latency       time.Duration `json:"latency,omitempty"`
+	LastErrorTime time.Duration `json:"last_error_time,omitempty"`
+	LastError     string        `json:"last_error,omitempty"`
 }
 
-func (a *AdminSocket) getPeersHandler(req *GetPeersRequest, res *GetPeersResponse) error {
+func (a *AdminSocket) getPeersHandler(_ *GetPeersRequest, res *GetPeersResponse) error {
 	peers := a.core.GetPeers()
 	res.Peers = make([]PeerEntry, 0, len(peers))
 	for _, p := range peers {
-		addr := address.AddrForKey(p.Key)
+		peer := PeerEntry{
-		res.Peers = append(res.Peers, PeerEntry{
+			Port:     p.Port,
-			IPAddress: net.IP(addr[:]).String(),
+			Up:       p.Up,
-			PublicKey: hex.EncodeToString(p.Key),
+			Inbound:  p.Inbound,
-			Port:      p.Port,
+			Priority: uint64(p.Priority), // can't be uint8 thanks to gobind
-			Priority:  uint64(p.Priority), // can't be uint8 thanks to gobind
+			Cost:     p.Cost,
-			Coords:    p.Coords,
+			URI:      p.URI,
-			Remote:    p.Remote,
+			RXBytes:  DataUnit(p.RXBytes),
-			RXBytes:   DataUnit(p.RXBytes),
+			TXBytes:  DataUnit(p.TXBytes),
-			TXBytes:   DataUnit(p.TXBytes),
+			RXRate:   DataUnit(p.RXRate),
-			Uptime:    p.Uptime.Seconds(),
+			TXRate:   DataUnit(p.TXRate),
-		})
+			Uptime:   p.Uptime.Seconds(),
-	}
-	sort.Slice(res.Peers, func(i, j int) bool {
-		if res.Peers[i].Port == res.Peers[j].Port {
-			return res.Peers[i].Priority < res.Peers[j].Priority
 		}
-		return res.Peers[i].Port < res.Peers[j].Port
+		if p.Latency > 0 {
+			peer.Latency = p.Latency
+		}
+		if addr := address.AddrForKey(p.Key); addr != nil {
+			peer.PublicKey = hex.EncodeToString(p.Key)
+			peer.IPAddress = net.IP(addr[:]).String()
+		}
+		if p.LastError != nil {
+			peer.LastError = p.LastError.Error()
+			peer.LastErrorTime = time.Since(p.LastErrorTime)
+		}
+		res.Peers = append(res.Peers, peer)
+	}
+	slices.SortStableFunc(res.Peers, func(a, b PeerEntry) int {
+		if !a.Inbound && b.Inbound {
+			return -1
+		}
+		if a.Inbound && !b.Inbound {
+			return 1
+		}
+		if d := strings.Compare(a.PublicKey, b.PublicKey); d != 0 {
+			return d
+		}
+		if d := a.Priority - b.Priority; d != 0 {
+			return int(d)
+		}
+		if d := a.Cost - b.Cost; d != 0 {
+			return int(d)
+		}
+		if d := a.Uptime - b.Uptime; d != 0 {
+			return int(d)
+		}
+		return 0
 	})
 	return nil
 }

src/admin/getself.go

@@ -9,15 +9,15 @@ import (
 type GetSelfRequest struct{}
 
 type GetSelfResponse struct {
-	BuildName    string   `json:"build_name"`
+	BuildName      string `json:"build_name"`
-	BuildVersion string   `json:"build_version"`
+	BuildVersion   string `json:"build_version"`
-	PublicKey    string   `json:"key"`
+	PublicKey      string `json:"key"`
-	IPAddress    string   `json:"address"`
+	IPAddress      string `json:"address"`
-	Coords       []uint64 `json:"coords"`
+	RoutingEntries uint64 `json:"routing_entries"`
-	Subnet       string   `json:"subnet"`
+	Subnet         string `json:"subnet"`
 }
 
-func (a *AdminSocket) getSelfHandler(req *GetSelfRequest, res *GetSelfResponse) error {
+func (a *AdminSocket) getSelfHandler(_ *GetSelfRequest, res *GetSelfResponse) error {
 	self := a.core.GetSelf()
 	snet := a.core.Subnet()
 	res.BuildName = version.BuildName()
@@ -25,6 +25,6 @@ func (a *AdminSocket) getSelfHandler(req *GetSelfRequest, res *GetSelfResponse)
 	res.PublicKey = hex.EncodeToString(self.Key[:])
 	res.IPAddress = a.core.Address().String()
 	res.Subnet = snet.String()
-	res.Coords = self.Coords
+	res.RoutingEntries = self.RoutingEntries
 	return nil
 }

src/admin/getsessions.go

@@ -3,7 +3,7 @@ package admin
 import (
 	"encoding/hex"
 	"net"
-	"sort"
+	"slices"
 	"strings"
 
 	"github.com/yggdrasil-network/yggdrasil-go/src/address"
@@ -23,7 +23,7 @@ type SessionEntry struct {
 	Uptime    float64  `json:"uptime"`
 }
 
-func (a *AdminSocket) getSessionsHandler(req *GetSessionsRequest, res *GetSessionsResponse) error {
+func (a *AdminSocket) getSessionsHandler(_ *GetSessionsRequest, res *GetSessionsResponse) error {
 	sessions := a.core.GetSessions()
 	res.Sessions = make([]SessionEntry, 0, len(sessions))
 	for _, s := range sessions {
@@ -36,8 +36,8 @@ func (a *AdminSocket) getSessionsHandler(req *GetSessionsRequest, res *GetSessio
 			Uptime:    s.Uptime.Seconds(),
 		})
 	}
-	sort.SliceStable(res.Sessions, func(i, j int) bool {
+	slices.SortStableFunc(res.Sessions, func(a, b SessionEntry) int {
-		return strings.Compare(res.Sessions[i].PublicKey, res.Sessions[j].PublicKey) < 0
+		return strings.Compare(a.PublicKey, b.PublicKey)
 	})
 	return nil
 }

src/admin/gettree.go

@@ -0,0 +1,41 @@
+package admin
+
+import (
+	"encoding/hex"
+	"net"
+	"slices"
+	"strings"
+
+	"github.com/yggdrasil-network/yggdrasil-go/src/address"
+)
+
+type GetTreeRequest struct{}
+
+type GetTreeResponse struct {
+	Tree []TreeEntry `json:"tree"`
+}
+
+type TreeEntry struct {
+	IPAddress string `json:"address"`
+	PublicKey string `json:"key"`
+	Parent    string `json:"parent"`
+	Sequence  uint64 `json:"sequence"`
+}
+
+func (a *AdminSocket) getTreeHandler(_ *GetTreeRequest, res *GetTreeResponse) error {
+	tree := a.core.GetTree()
+	res.Tree = make([]TreeEntry, 0, len(tree))
+	for _, d := range tree {
+		addr := address.AddrForKey(d.Key)
+		res.Tree = append(res.Tree, TreeEntry{
+			IPAddress: net.IP(addr[:]).String(),
+			PublicKey: hex.EncodeToString(d.Key[:]),
+			Parent:    hex.EncodeToString(d.Parent[:]),
+			Sequence:  d.Sequence,
+		})
+	}
+	slices.SortStableFunc(res.Tree, func(a, b TreeEntry) int {
+		return strings.Compare(a.PublicKey, b.PublicKey)
+	})
+	return nil
+}

src/admin/options.go

@@ -1,9 +1,24 @@
 package admin
 
+import (
+	"crypto/ed25519"
+	"encoding/hex"
+	"encoding/json"
+	"net"
+	"sync"
+	"time"
+
+	"github.com/Arceliar/ironwood/network"
+
+	"github.com/yggdrasil-network/yggdrasil-go/src/address"
+)
+
 func (c *AdminSocket) _applyOption(opt SetupOption) {
 	switch v := opt.(type) {
 	case ListenAddress:
 		c.config.listenaddr = v
+	case LogLookups:
+		c.logLookups()
 	}
 }
 
@@ -14,3 +29,51 @@ type SetupOption interface {
 type ListenAddress string
 
 func (a ListenAddress) isSetupOption() {}
+
+type LogLookups struct{}
+
+func (l LogLookups) isSetupOption() {}
+
+func (a *AdminSocket) logLookups() {
+	type resi struct {
+		Address string   `json:"addr"`
+		Key     string   `json:"key"`
+		Path    []uint64 `json:"path"`
+		Time    int64    `json:"time"`
+	}
+	type res struct {
+		Infos []resi `json:"infos"`
+	}
+	type info struct {
+		path []uint64
+		time time.Time
+	}
+	type edk [ed25519.PublicKeySize]byte
+	infos := make(map[edk]info)
+	var m sync.Mutex
+	a.core.PacketConn.PacketConn.Debug.SetDebugLookupLogger(func(l network.DebugLookupInfo) {
+		var k edk
+		copy(k[:], l.Key[:])
+		m.Lock()
+		infos[k] = info{path: l.Path, time: time.Now()}
+		m.Unlock()
+	})
+	_ = a.AddHandler(
+		"lookups", "Dump a record of lookups received in the past hour", []string{},
+		func(in json.RawMessage) (interface{}, error) {
+			m.Lock()
+			rs := make([]resi, 0, len(infos))
+			for k, v := range infos {
+				if time.Since(v.time) > 24*time.Hour {
+					// TODO? automatic cleanup, so we don't need to call lookups periodically to prevent leaks
+					delete(infos, k)
+				}
+				a := address.AddrForKey(ed25519.PublicKey(k[:]))
+				addr := net.IP(a[:]).String()
+				rs = append(rs, resi{Address: addr, Key: hex.EncodeToString(k[:]), Path: v.path, Time: v.time.Unix()})
+			}
+			m.Unlock()
+			return &res{Infos: rs}, nil
+		},
+	)
+}

src/admin/removepeer.go

@@ -1,5 +1,10 @@
 package admin
 
+import (
+	"fmt"
+	"net/url"
+)
+
 type RemovePeerRequest struct {
 	Uri   string `json:"uri"`
 	Sintf string `json:"interface,omitempty"`
@@ -7,6 +12,10 @@ type RemovePeerRequest struct {
 
 type RemovePeerResponse struct{}
 
-func (a *AdminSocket) removePeerHandler(req *RemovePeerRequest, res *RemovePeerResponse) error {
+func (a *AdminSocket) removePeerHandler(req *RemovePeerRequest, _ *RemovePeerResponse) error {
-	return a.core.RemovePeer(req.Uri, req.Sintf)
+	u, err := url.Parse(req.Uri)
+	if err != nil {
+		return fmt.Errorf("unable to parse peering URI: %w", err)
+	}
+	return a.core.RemovePeer(u, req.Sintf)
 }

src/config/config.go

@@ -17,44 +17,244 @@ configuration option that is not provided.
 package config
 
 import (
+	"bytes"
 	"crypto/ed25519"
+	"crypto/rand"
+	"crypto/tls"
+	"crypto/x509"
+	"crypto/x509/pkix"
 	"encoding/hex"
+	"encoding/json"
+	"encoding/pem"
+	"fmt"
+	"io"
+	"math/big"
+	"os"
+	"time"
+
+	"github.com/hjson/hjson-go/v4"
+	"golang.org/x/text/encoding/unicode"
 )
 
 // NodeConfig is the main configuration structure, containing configuration
 // options that are necessary for an Yggdrasil node to run. You will need to
 // supply one of these structs to the Yggdrasil core when starting a node.
 type NodeConfig struct {
-	Peers               []string                   `comment:"List of connection strings for outbound peer connections in URI format,\ne.g. tls://a.b.c.d:e or socks://a.b.c.d:e/f.g.h.i:j. These connections\nwill obey the operating system routing table, therefore you should\nuse this section when you may connect via different interfaces."`
+	PrivateKey          KeyBytes                   `json:",omitempty" comment:"Your private key. DO NOT share this with anyone!"`
-	InterfacePeers      map[string][]string        `comment:"List of connection strings for outbound peer connections in URI format,\narranged by source interface, e.g. { \"eth0\": [ \"tls://a.b.c.d:e\" ] }.\nNote that SOCKS peerings will NOT be affected by this option and should\ngo in the \"Peers\" section instead."`
+	PrivateKeyPath      string                     `json:",omitempty" comment:"The path to your private key file in PEM format."`
-	Listen              []string                   `comment:"Listen addresses for incoming connections. You will need to add\nlisteners in order to accept incoming peerings from non-local nodes.\nMulticast peer discovery will work regardless of any listeners set\nhere. Each listener should be specified in URI format as above, e.g.\ntls://0.0.0.0:0 or tls://[::]:0 to listen on all interfaces."`
+	Certificate         *tls.Certificate           `json:"-"`
-	AdminListen         string                     `comment:"Listen address for admin connections. Default is to listen for local\nconnections either on TCP/9001 or a UNIX socket depending on your\nplatform. Use this value for yggdrasilctl -endpoint=X. To disable\nthe admin socket, use the value \"none\" instead."`
+	Peers               []string                   `comment:"List of outbound peer connection strings (e.g. tls://a.b.c.d:e or\nsocks://a.b.c.d:e/f.g.h.i:j). Connection strings can contain options,\nsee https://yggdrasil-network.github.io/configurationref.html#peers.\nYggdrasil has no concept of bootstrap nodes - all network traffic\nwill transit peer connections. Therefore make sure to only peer with\nnearby nodes that have good connectivity and low latency. Avoid adding\npeers to this list from distant countries as this will worsen your\nnode's connectivity and performance considerably."`
-	MulticastInterfaces []MulticastInterfaceConfig `comment:"Configuration for which interfaces multicast peer discovery should be\nenabled on. Each entry in the list should be a json object which may\ncontain Regex, Beacon, Listen, and Port. Regex is a regular expression\nwhich is matched against an interface name, and interfaces use the\nfirst configuration that they match gainst. Beacon configures whether\nor not the node should send link-local multicast beacons to advertise\ntheir presence, while listening for incoming connections on Port.\nListen controls whether or not the node listens for multicast beacons\nand opens outgoing connections."`
+	InterfacePeers      map[string][]string        `comment:"List of connection strings for outbound peer connections in URI format,\narranged by source interface, e.g. { \"eth0\": [ \"tls://a.b.c.d:e\" ] }.\nYou should only use this option if your machine is multi-homed and you\nwant to establish outbound peer connections on different interfaces.\nOtherwise you should use \"Peers\"."`
-	AllowedPublicKeys   []string                   `comment:"List of peer public keys to allow incoming peering connections\nfrom. If left empty/undefined then all connections will be allowed\nby default. This does not affect outgoing peerings, nor does it\naffect link-local peers discovered via multicast."`
+	Listen              []string                   `comment:"Listen addresses for incoming connections. You will need to add\nlisteners in order to accept incoming peerings from non-local nodes.\nThis is not required if you wish to establish outbound peerings only.\nMulticast peer discovery will work regardless of any listeners set\nhere. Each listener should be specified in URI format as above, e.g.\ntls://0.0.0.0:0 or tls://[::]:0 to listen on all interfaces."`
-	PublicKey           string                     `comment:"Your public key. Your peers may ask you for this to put\ninto their AllowedPublicKeys configuration."`
+	AdminListen         string                     `json:",omitempty" comment:"Listen address for admin connections. Default is to listen for local\nconnections either on TCP/9001 or a UNIX socket depending on your\nplatform. Use this value for yggdrasilctl -endpoint=X. To disable\nthe admin socket, use the value \"none\" instead."`
-	PrivateKey          string                     `comment:"Your private key. DO NOT share this with anyone!"`
+	MulticastInterfaces []MulticastInterfaceConfig `comment:"Configuration for which interfaces multicast peer discovery should be\nenabled on. Regex is a regular expression which is matched against an\ninterface name, and interfaces use the first configuration that they\nmatch against. Beacon controls whether or not your node advertises its\npresence to others, whereas Listen controls whether or not your node\nlistens out for and tries to connect to other advertising nodes. See\nhttps://yggdrasil-network.github.io/configurationref.html#multicastinterfaces\nfor more supported options."`
+	AllowedPublicKeys   []string                   `comment:"List of peer public keys to allow incoming peering connections\nfrom. If left empty/undefined then all connections will be allowed\nby default. This does not affect outgoing peerings, nor does it\naffect link-local peers discovered via multicast.\nWARNING: THIS IS NOT A FIREWALL and DOES NOT limit who can reach\nopen ports or services running on your machine!"`
 	IfName              string                     `comment:"Local network interface name for TUN adapter, or \"auto\" to select\nan interface automatically, or \"none\" to run without TUN."`
 	IfMTU               uint64                     `comment:"Maximum Transmission Unit (MTU) size for your local TUN interface.\nDefault is the largest supported size for your platform. The lowest\npossible value is 1280."`
+	LogLookups          bool                       `json:",omitempty"`
 	NodeInfoPrivacy     bool                       `comment:"By default, nodeinfo contains some defaults including the platform,\narchitecture and Yggdrasil version. These can help when surveying\nthe network and diagnosing network routing problems. Enabling\nnodeinfo privacy prevents this, so that only items specified in\n\"NodeInfo\" are sent back if specified."`
-	NodeInfo            map[string]interface{}     `comment:"Optional node info. This must be a { \"key\": \"value\", ... } map\nor set as null. This is entirely optional but, if set, is visible\nto the whole network on request."`
+	NodeInfo            map[string]interface{}     `comment:"Optional nodeinfo. This must be a { \"key\": \"value\", ... } map\nor set as null. This is entirely optional but, if set, is visible\nto the whole network on request."`
 }
 
 type MulticastInterfaceConfig struct {
 	Regex    string
 	Beacon   bool
 	Listen   bool
-	Port     uint16
+	Port     uint16 `json:",omitempty"`
-	Priority uint64 // really uint8, but gobind won't export it
+	Priority uint64 `json:",omitempty"` // really uint8, but gobind won't export it
+	Password string
 }
 
-// NewSigningKeys replaces the signing keypair in the NodeConfig with a new
+// Generates default configuration and returns a pointer to the resulting
-// signing keypair. The signing keys are used by the switch to derive the
+// NodeConfig. This is used when outputting the -genconf parameter and also when
-// structure of the spanning tree.
+// using -autoconf.
-func (cfg *NodeConfig) NewKeys() {
+func GenerateConfig() *NodeConfig {
-	spub, spriv, err := ed25519.GenerateKey(nil)
+	// Get the defaults for the platform.
+	defaults := GetDefaults()
+	// Create a node configuration and populate it.
+	cfg := new(NodeConfig)
+	cfg.NewPrivateKey()
+	cfg.Listen = []string{}
+	cfg.AdminListen = defaults.DefaultAdminListen
+	cfg.Peers = []string{}
+	cfg.InterfacePeers = map[string][]string{}
+	cfg.AllowedPublicKeys = []string{}
+	cfg.MulticastInterfaces = defaults.DefaultMulticastInterfaces
+	cfg.IfName = defaults.DefaultIfName
+	cfg.IfMTU = defaults.DefaultIfMTU
+	cfg.NodeInfoPrivacy = false
+	if err := cfg.postprocessConfig(); err != nil {
+		panic(err)
+	}
+	return cfg
+}
+
+func (cfg *NodeConfig) ReadFrom(r io.Reader) (int64, error) {
+	conf, err := io.ReadAll(r)
+	if err != nil {
+		return 0, err
+	}
+	n := int64(len(conf))
+	// If there's a byte order mark - which Windows 10 is now incredibly fond of
+	// throwing everywhere when it's converting things into UTF-16 for the hell
+	// of it - remove it and decode back down into UTF-8. This is necessary
+	// because hjson doesn't know what to do with UTF-16 and will panic
+	if bytes.Equal(conf[0:2], []byte{0xFF, 0xFE}) ||
+		bytes.Equal(conf[0:2], []byte{0xFE, 0xFF}) {
+		utf := unicode.UTF16(unicode.BigEndian, unicode.UseBOM)
+		decoder := utf.NewDecoder()
+		conf, err = decoder.Bytes(conf)
+		if err != nil {
+			return n, err
+		}
+	}
+	// Generate a new configuration - this gives us a set of sane defaults -
+	// then parse the configuration we loaded above on top of it. The effect
+	// of this is that any configuration item that is missing from the provided
+	// configuration will use a sane default.
+	*cfg = *GenerateConfig()
+	if err := cfg.UnmarshalHJSON(conf); err != nil {
+		return n, err
+	}
+	return n, nil
+}
+
+func (cfg *NodeConfig) UnmarshalHJSON(b []byte) error {
+	if err := hjson.Unmarshal(b, cfg); err != nil {
+		return err
+	}
+	return cfg.postprocessConfig()
+}
+
+func (cfg *NodeConfig) postprocessConfig() error {
+	if cfg.PrivateKeyPath != "" {
+		cfg.PrivateKey = nil
+		f, err := os.ReadFile(cfg.PrivateKeyPath)
+		if err != nil {
+			return err
+		}
+		if err := cfg.UnmarshalPEMPrivateKey(f); err != nil {
+			return err
+		}
+	}
+	switch {
+	case cfg.Certificate == nil:
+		// No self-signed certificate has been generated yet.
+		fallthrough
+	case !bytes.Equal(cfg.Certificate.PrivateKey.(ed25519.PrivateKey), cfg.PrivateKey):
+		// A self-signed certificate was generated but the private
+		// key has changed since then, possibly because a new config
+		// was parsed.
+		if err := cfg.GenerateSelfSignedCertificate(); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// RFC5280 section 4.1.2.5
+var notAfterNeverExpires = time.Date(9999, time.December, 31, 23, 59, 59, 0, time.UTC)
+
+func (cfg *NodeConfig) GenerateSelfSignedCertificate() error {
+	key, err := cfg.MarshalPEMPrivateKey()
+	if err != nil {
+		return err
+	}
+	cert, err := cfg.MarshalPEMCertificate()
+	if err != nil {
+		return err
+	}
+	tlsCert, err := tls.X509KeyPair(cert, key)
+	if err != nil {
+		return err
+	}
+	cfg.Certificate = &tlsCert
+	return nil
+}
+
+func (cfg *NodeConfig) MarshalPEMCertificate() ([]byte, error) {
+	privateKey := ed25519.PrivateKey(cfg.PrivateKey)
+	publicKey := privateKey.Public().(ed25519.PublicKey)
+
+	cert := &x509.Certificate{
+		SerialNumber: big.NewInt(1),
+		Subject: pkix.Name{
+			CommonName: hex.EncodeToString(publicKey),
+		},
+		NotBefore:             time.Now(),
+		NotAfter:              notAfterNeverExpires,
+		KeyUsage:              x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature,
+		ExtKeyUsage:           []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth},
+		BasicConstraintsValid: true,
+	}
+
+	certbytes, err := x509.CreateCertificate(rand.Reader, cert, cert, publicKey, privateKey)
+	if err != nil {
+		return nil, err
+	}
+
+	block := &pem.Block{
+		Type:  "CERTIFICATE",
+		Bytes: certbytes,
+	}
+	return pem.EncodeToMemory(block), nil
+}
+
+func (cfg *NodeConfig) NewPrivateKey() {
+	_, spriv, err := ed25519.GenerateKey(nil)
 	if err != nil {
 		panic(err)
 	}
-	cfg.PublicKey = hex.EncodeToString(spub[:])
+	cfg.PrivateKey = KeyBytes(spriv)
-	cfg.PrivateKey = hex.EncodeToString(spriv[:])
+}
+
+func (cfg *NodeConfig) MarshalPEMPrivateKey() ([]byte, error) {
+	b, err := x509.MarshalPKCS8PrivateKey(ed25519.PrivateKey(cfg.PrivateKey))
+	if err != nil {
+		return nil, fmt.Errorf("failed to marshal PKCS8 key: %w", err)
+	}
+	block := &pem.Block{
+		Type:  "PRIVATE KEY",
+		Bytes: b,
+	}
+	return pem.EncodeToMemory(block), nil
+}
+
+func (cfg *NodeConfig) UnmarshalPEMPrivateKey(b []byte) error {
+	p, _ := pem.Decode(b)
+	if p == nil {
+		return fmt.Errorf("failed to parse PEM file")
+	}
+	if p.Type != "PRIVATE KEY" {
+		return fmt.Errorf("unexpected PEM type %q", p.Type)
+	}
+	k, err := x509.ParsePKCS8PrivateKey(p.Bytes)
+	if err != nil {
+		return fmt.Errorf("failed to unmarshal PKCS8 key: %w", err)
+	}
+	key, ok := k.(ed25519.PrivateKey)
+	if !ok {
+		return fmt.Errorf("private key must be ed25519 key")
+	}
+	if len(key) != ed25519.PrivateKeySize {
+		return fmt.Errorf("unexpected ed25519 private key length")
+	}
+	cfg.PrivateKey = KeyBytes(key)
+	return nil
+}
+
+type KeyBytes []byte
+
+func (k KeyBytes) MarshalJSON() ([]byte, error) {
+	return json.Marshal(hex.EncodeToString(k))
+}
+
+func (k *KeyBytes) UnmarshalJSON(b []byte) error {
+	var s string
+	var err error
+	if err = json.Unmarshal(b, &s); err != nil {
+		return err
+	}
+	*k, err = hex.DecodeString(s)
+	return err
 }

src/config/config_test.go

@@ -1,54 +1,54 @@
 package config
 
 import (
-	"bytes"
-	"encoding/hex"
 	"testing"
 )
 
 func TestConfig_Keys(t *testing.T) {
-	var nodeConfig NodeConfig
+	/*
-	nodeConfig.NewKeys()
+		var nodeConfig NodeConfig
+		nodeConfig.NewKeys()
 
-	publicKey1, err := hex.DecodeString(nodeConfig.PublicKey)
+		publicKey1, err := hex.DecodeString(nodeConfig.PublicKey)
 
-	if err != nil {
+		if err != nil {
-		t.Fatal("can not decode generated public key")
+			t.Fatal("can not decode generated public key")
-	}
+		}
 
-	if len(publicKey1) == 0 {
+		if len(publicKey1) == 0 {
-		t.Fatal("empty public key generated")
+			t.Fatal("empty public key generated")
-	}
+		}
 
-	privateKey1, err := hex.DecodeString(nodeConfig.PrivateKey)
+		privateKey1, err := hex.DecodeString(nodeConfig.PrivateKey)
 
-	if err != nil {
+		if err != nil {
-		t.Fatal("can not decode generated private key")
+			t.Fatal("can not decode generated private key")
-	}
+		}
 
-	if len(privateKey1) == 0 {
+		if len(privateKey1) == 0 {
-		t.Fatal("empty private key generated")
+			t.Fatal("empty private key generated")
-	}
+		}
 
-	nodeConfig.NewKeys()
+		nodeConfig.NewKeys()
 
-	publicKey2, err := hex.DecodeString(nodeConfig.PublicKey)
+		publicKey2, err := hex.DecodeString(nodeConfig.PublicKey)
 
-	if err != nil {
+		if err != nil {
-		t.Fatal("can not decode generated public key")
+			t.Fatal("can not decode generated public key")
-	}
+		}
 
-	if bytes.Equal(publicKey2, publicKey1) {
+		if bytes.Equal(publicKey2, publicKey1) {
-		t.Fatal("same public key generated")
+			t.Fatal("same public key generated")
-	}
+		}
 
-	privateKey2, err := hex.DecodeString(nodeConfig.PrivateKey)
+		privateKey2, err := hex.DecodeString(nodeConfig.PrivateKey)
 
-	if err != nil {
+		if err != nil {
-		t.Fatal("can not decode generated private key")
+			t.Fatal("can not decode generated private key")
-	}
+		}
 
-	if bytes.Equal(privateKey2, privateKey1) {
+		if bytes.Equal(privateKey2, privateKey1) {
-		t.Fatal("same private key generated")
+			t.Fatal("same private key generated")
-	}
+		}
+	*/
 }

src/config/defaults.go

@@ -0,0 +1,34 @@
+package config
+
+var defaultConfig = ""      // LDFLAGS='-X github.com/yggdrasil-network/yggdrasil-go/src/config.defaultConfig=/path/to/config
+var defaultAdminListen = "" // LDFLAGS='-X github.com/yggdrasil-network/yggdrasil-go/src/config.defaultAdminListen=unix://path/to/sock'
+
+// Defines which parameters are expected by default for configuration on a
+// specific platform. These values are populated in the relevant defaults_*.go
+// for the platform being targeted. They must be set.
+type platformDefaultParameters struct {
+	// Admin socket
+	DefaultAdminListen string
+
+	// Configuration (used for yggdrasilctl)
+	DefaultConfigFile string
+
+	// Multicast interfaces
+	DefaultMulticastInterfaces []MulticastInterfaceConfig
+
+	// TUN
+	MaximumIfMTU  uint64
+	DefaultIfMTU  uint64
+	DefaultIfName string
+}
+
+func GetDefaults() platformDefaultParameters {
+	defaults := getDefaults()
+	if defaultConfig != "" {
+		defaults.DefaultConfigFile = defaultConfig
+	}
+	if defaultAdminListen != "" {
+		defaults.DefaultAdminListen = defaultAdminListen
+	}
+	return defaults
+}

src/config/defaults_darwin.go

@@ -1,7 +1,7 @@
 //go:build darwin
 // +build darwin
 
-package defaults
+package config
 
 // Sane defaults for the macOS/Darwin platform. The "default" options may be
 // may be replaced by the running configuration.
@@ -17,6 +17,7 @@ func getDefaults() platformDefaultParameters {
 		DefaultMulticastInterfaces: []MulticastInterfaceConfig{
 			{Regex: "en.*", Beacon: true, Listen: true},
 			{Regex: "bridge.*", Beacon: true, Listen: true},
+			{Regex: "awdl0", Beacon: false, Listen: false},
 		},
 
 		// TUN

src/config/defaults_freebsd.go

@@ -1,7 +1,7 @@
 //go:build freebsd
 // +build freebsd
 
-package defaults
+package config
 
 // Sane defaults for the BSD platforms. The "default" options may be
 // may be replaced by the running configuration.

src/config/defaults_linux.go

@@ -1,7 +1,7 @@
 //go:build linux
 // +build linux
 
-package defaults
+package config
 
 // Sane defaults for the Linux platform. The "default" options may be
 // may be replaced by the running configuration.

src/config/defaults_openbsd.go

@@ -1,7 +1,7 @@
 //go:build openbsd
 // +build openbsd
 
-package defaults
+package config
 
 // Sane defaults for the BSD platforms. The "default" options may be
 // may be replaced by the running configuration.

src/config/defaults_other.go

@@ -1,7 +1,7 @@
 //go:build !linux && !darwin && !windows && !openbsd && !freebsd
 // +build !linux,!darwin,!windows,!openbsd,!freebsd
 
-package defaults
+package config
 
 // Sane defaults for the other platforms. The "default" options may be
 // may be replaced by the running configuration.

src/config/defaults_windows.go

@@ -1,7 +1,7 @@
 //go:build windows
 // +build windows
 
-package defaults
+package config
 
 // Sane defaults for the Windows platform. The "default" options may be
 // may be replaced by the running configuration.

src/core/api.go

@@ -3,43 +3,54 @@ package core
 import (
 	"crypto/ed25519"
 	"encoding/json"
-	"fmt"
 	"net"
 	"net/url"
 	"sync/atomic"
 	"time"
 
 	"github.com/Arceliar/phony"
+
+	"github.com/Arceliar/ironwood/network"
 	"github.com/yggdrasil-network/yggdrasil-go/src/address"
 )
 
 type SelfInfo struct {
-	Key    ed25519.PublicKey
+	Key            ed25519.PublicKey
-	Root   ed25519.PublicKey
+	RoutingEntries uint64
-	Coords []uint64
 }
 
 type PeerInfo struct {
-	Key      ed25519.PublicKey
+	URI           string
-	Root     ed25519.PublicKey
+	Up            bool
-	Coords   []uint64
+	Inbound       bool
-	Port     uint64
+	LastError     error
-	Priority uint8
+	LastErrorTime time.Time
-	Remote   string
+	Key           ed25519.PublicKey
-	RXBytes  uint64
+	Root          ed25519.PublicKey
-	TXBytes  uint64
+	Coords        []uint64
-	Uptime   time.Duration
+	Port          uint64
+	Priority      uint8
+	Cost          uint64
+	RXBytes       uint64
+	TXBytes       uint64
+	RXRate        uint64
+	TXRate        uint64
+	Uptime        time.Duration
+	Latency       time.Duration
 }
 
-type DHTEntryInfo struct {
+type TreeEntryInfo struct {
-	Key  ed25519.PublicKey
+	Key      ed25519.PublicKey
-	Port uint64
+	Parent   ed25519.PublicKey
-	Rest uint64
+	Sequence uint64
+	//Port uint64
+	//Rest uint64
 }
 
 type PathEntryInfo struct {
-	Key  ed25519.PublicKey
+	Key      ed25519.PublicKey
-	Path []uint64
+	Path     []uint64
+	Sequence uint64
 }
 
 type SessionInfo struct {
@@ -53,55 +64,63 @@ func (c *Core) GetSelf() SelfInfo {
 	var self SelfInfo
 	s := c.PacketConn.PacketConn.Debug.GetSelf()
 	self.Key = s.Key
-	self.Root = s.Root
+	self.RoutingEntries = s.RoutingEntries
-	self.Coords = s.Coords
 	return self
 }
 
 func (c *Core) GetPeers() []PeerInfo {
-	var peers []PeerInfo
+	peers := []PeerInfo{}
-	names := make(map[net.Conn]string)
+	conns := map[net.Conn]network.DebugPeerInfo{}
+	iwpeers := c.PacketConn.PacketConn.Debug.GetPeers()
+	for _, p := range iwpeers {
+		conns[p.Conn] = p
+	}
+
 	phony.Block(&c.links, func() {
-		for _, info := range c.links._links {
+		for info, state := range c.links._links {
-			if info == nil {
+			var peerinfo PeerInfo
-				continue
+			var conn net.Conn
+			peerinfo.URI = info.uri
+			peerinfo.LastError = state._err
+			peerinfo.LastErrorTime = state._errtime
+			if c := state._conn; c != nil {
+				conn = c
+				peerinfo.Up = true
+				peerinfo.Inbound = state.linkType == linkTypeIncoming
+				peerinfo.RXBytes = atomic.LoadUint64(&c.rx)
+				peerinfo.TXBytes = atomic.LoadUint64(&c.tx)
+				peerinfo.RXRate = atomic.LoadUint64(&c.rxrate)
+				peerinfo.TXRate = atomic.LoadUint64(&c.txrate)
+				peerinfo.Uptime = time.Since(c.up)
 			}
-			names[info.conn] = info.lname
+			if p, ok := conns[conn]; ok {
+				peerinfo.Key = p.Key
+				peerinfo.Root = p.Root
+				peerinfo.Port = p.Port
+				peerinfo.Priority = p.Priority
+				peerinfo.Latency = p.Latency
+				peerinfo.Cost = p.Cost
+			}
+			peers = append(peers, peerinfo)
 		}
 	})
-	ps := c.PacketConn.PacketConn.Debug.GetPeers()
+
-	for _, p := range ps {
-		var info PeerInfo
-		info.Key = p.Key
-		info.Root = p.Root
-		info.Coords = p.Coords
-		info.Port = p.Port
-		info.Priority = p.Priority
-		info.Remote = p.Conn.RemoteAddr().String()
-		if name := names[p.Conn]; name != "" {
-			info.Remote = name
-		}
-		if linkconn, ok := p.Conn.(*linkConn); ok {
-			info.RXBytes = atomic.LoadUint64(&linkconn.rx)
-			info.TXBytes = atomic.LoadUint64(&linkconn.tx)
-			info.Uptime = time.Since(linkconn.up)
-		}
-		peers = append(peers, info)
-	}
 	return peers
 }
 
-func (c *Core) GetDHT() []DHTEntryInfo {
+func (c *Core) GetTree() []TreeEntryInfo {
-	var dhts []DHTEntryInfo
+	var trees []TreeEntryInfo
-	ds := c.PacketConn.PacketConn.Debug.GetDHT()
+	ts := c.PacketConn.PacketConn.Debug.GetTree()
-	for _, d := range ds {
+	for _, t := range ts {
-		var info DHTEntryInfo
+		var info TreeEntryInfo
-		info.Key = d.Key
+		info.Key = t.Key
-		info.Port = d.Port
+		info.Parent = t.Parent
-		info.Rest = d.Rest
+		info.Sequence = t.Sequence
-		dhts = append(dhts, info)
+		//info.Port = d.Port
+		//info.Rest = d.Rest
+		trees = append(trees, info)
 	}
-	return dhts
+	return trees
 }
 
 func (c *Core) GetPaths() []PathEntryInfo {
@@ -110,6 +129,7 @@ func (c *Core) GetPaths() []PathEntryInfo {
 	for _, p := range ps {
 		var info PathEntryInfo
 		info.Key = p.Key
+		info.Sequence = p.Sequence
 		info.Path = p.Path
 		paths = append(paths, info)
 	}
@@ -134,16 +154,14 @@ func (c *Core) GetSessions() []SessionInfo {
 // parsed from a string of the form e.g. "tcp://a.b.c.d:e". In the case of a
 // link-local address, the interface should be provided as the second argument.
 func (c *Core) Listen(u *url.URL, sintf string) (*Listener, error) {
-	switch u.Scheme {
+	return c.links.listen(u, sintf, false)
-	case "tcp":
+}
-		return c.links.tcp.listen(u, sintf)
+
-	case "tls":
+// ListenLocal starts a listener, like the Listen function, but is used for
-		return c.links.tls.listen(u, sintf)
+// more trustworthy situations where you want to ignore AllowedPublicKeys, i.e.
-	case "unix":
+// with multicast listeners.
-		return c.links.unix.listen(u, sintf)
+func (c *Core) ListenLocal(u *url.URL, sintf string) (*Listener, error) {
-	default:
+	return c.links.listen(u, sintf, true)
-		return nil, fmt.Errorf("unrecognised scheme %q", u.Scheme)
-	}
 }
 
 // Address gets the IPv6 address of the Yggdrasil node. This is always a /128
@@ -182,49 +200,14 @@ func (c *Core) SetLogger(log Logger) {
 //
 // This adds the peer to the peer list, so that they will be called again if the
 // connection drops.
-func (c *Core) AddPeer(uri string, sourceInterface string) error {
+func (c *Core) AddPeer(u *url.URL, sintf string) error {
-	var known bool
+	return c.links.add(u, sintf, linkTypePersistent)
-	phony.Block(c, func() {
-		_, known = c.config._peers[Peer{uri, sourceInterface}]
-	})
-	if known {
-		return fmt.Errorf("peer already configured")
-	}
-	u, err := url.Parse(uri)
-	if err != nil {
-		return err
-	}
-	info, err := c.links.call(u, sourceInterface, nil)
-	if err != nil {
-		return err
-	}
-	phony.Block(c, func() {
-		c.config._peers[Peer{uri, sourceInterface}] = &info
-	})
-	return nil
 }
 
 // RemovePeer removes a peer. The peer should be specified in URI format, see AddPeer.
 // The peer is not disconnected immediately.
-func (c *Core) RemovePeer(uri string, sourceInterface string) error {
+func (c *Core) RemovePeer(u *url.URL, sintf string) error {
-	var err error
+	return c.links.remove(u, sintf, linkTypePersistent)
-	phony.Block(c, func() {
-		peer := Peer{uri, sourceInterface}
-		linkInfo, ok := c.config._peers[peer]
-		if !ok {
-			err = fmt.Errorf("peer not configured")
-			return
-		}
-		if ok && linkInfo != nil {
-			c.links.Act(nil, func() {
-				if link := c.links._links[*linkInfo]; link != nil {
-					_ = link.close()
-				}
-			})
-		}
-		delete(c.config._peers, peer)
-	})
-	return err
 }
 
 // CallPeer calls a peer once. This should be specified in the peer URI format,
@@ -236,8 +219,7 @@ func (c *Core) RemovePeer(uri string, sourceInterface string) error {
 // This does not add the peer to the peer list, so if the connection drops, the
 // peer will not be called again automatically.
 func (c *Core) CallPeer(u *url.URL, sintf string) error {
-	_, err := c.links.call(u, sintf, nil)
+	return c.links.add(u, sintf, linkTypeEphemeral)
-	return err
 }
 
 func (c *Core) PublicKey() ed25519.PublicKey {
@@ -274,8 +256,8 @@ func (c *Core) SetAdmin(a AddHandler) error {
 		return err
 	}
 	if err := a.AddHandler(
-		"debug_remoteGetDHT", "Debug use only", []string{"key"},
+		"debug_remoteGetTree", "Debug use only", []string{"key"},
-		c.proto.getDHTHandler,
+		c.proto.getTreeHandler,
 	); err != nil {
 		return err
 	}

src/core/core.go

@@ -3,6 +3,7 @@ package core
 import (
 	"context"
 	"crypto/ed25519"
+	"crypto/tls"
 	"fmt"
 	"io"
 	"net"
@@ -10,10 +11,12 @@ import (
 	"time"
 
 	iwe "github.com/Arceliar/ironwood/encrypted"
+	iwn "github.com/Arceliar/ironwood/network"
 	iwt "github.com/Arceliar/ironwood/types"
 	"github.com/Arceliar/phony"
 	"github.com/gologme/log"
 
+	"github.com/yggdrasil-network/yggdrasil-go/src/address"
 	"github.com/yggdrasil-network/yggdrasil-go/src/version"
 )
 
@@ -34,49 +37,88 @@ type Core struct {
 	log          Logger
 	addPeerTimer *time.Timer
 	config       struct {
-		_peers             map[Peer]*linkInfo         // configurable after startup
+		tls *tls.Config // immutable after startup
+		//_peers             map[Peer]*linkInfo         // configurable after startup
 		_listeners         map[ListenAddress]struct{} // configurable after startup
+		peerFilter         func(ip net.IP) bool       // immutable after startup
 		nodeinfo           NodeInfo                   // immutable after startup
 		nodeinfoPrivacy    NodeInfoPrivacy            // immutable after startup
 		_allowedPublicKeys map[[32]byte]struct{}      // configurable after startup
 	}
+	pathNotify func(ed25519.PublicKey)
 }
 
-func New(secret ed25519.PrivateKey, logger Logger, opts ...SetupOption) (*Core, error) {
+func New(cert *tls.Certificate, logger Logger, opts ...SetupOption) (*Core, error) {
 	c := &Core{
 		log: logger,
 	}
+	c.ctx, c.cancel = context.WithCancel(context.Background())
+	if c.log == nil {
+		c.log = log.New(io.Discard, "", 0)
+	}
+
 	if name := version.BuildName(); name != "unknown" {
 		c.log.Infoln("Build name:", name)
 	}
 	if version := version.BuildVersion(); version != "unknown" {
 		c.log.Infoln("Build version:", version)
 	}
-	c.ctx, c.cancel = context.WithCancel(context.Background())
+
-	// Take a copy of the private key so that it is in our own memory space.
-	if len(secret) != ed25519.PrivateKeySize {
-		return nil, fmt.Errorf("private key is incorrect length")
-	}
-	c.secret = make(ed25519.PrivateKey, ed25519.PrivateKeySize)
-	copy(c.secret, secret)
-	c.public = secret.Public().(ed25519.PublicKey)
 	var err error
-	if c.PacketConn, err = iwe.NewPacketConn(c.secret); err != nil {
-		return nil, fmt.Errorf("error creating encryption: %w", err)
-	}
-	c.config._peers = map[Peer]*linkInfo{}
 	c.config._listeners = map[ListenAddress]struct{}{}
 	c.config._allowedPublicKeys = map[[32]byte]struct{}{}
 	for _, opt := range opts {
-		c._applyOption(opt)
+		switch opt.(type) {
+		case Peer, ListenAddress:
+			// We can't do peers yet as the links aren't set up.
+			continue
+		default:
+			if err = c._applyOption(opt); err != nil {
+				return nil, fmt.Errorf("failed to apply configuration option %T: %w", opt, err)
+			}
+		}
 	}
-	if c.log == nil {
+	if cert == nil || cert.PrivateKey == nil {
-		c.log = log.New(io.Discard, "", 0)
+		return nil, fmt.Errorf("no private key supplied")
+	}
+	var ok bool
+	if c.secret, ok = cert.PrivateKey.(ed25519.PrivateKey); !ok {
+		return nil, fmt.Errorf("private key must be ed25519")
+	}
+	if len(c.secret) != ed25519.PrivateKeySize {
+		return nil, fmt.Errorf("private key is incorrect length")
+	}
+	c.public = c.secret.Public().(ed25519.PublicKey)
+
+	if c.config.tls, err = c.generateTLSConfig(cert); err != nil {
+		return nil, fmt.Errorf("error generating TLS config: %w", err)
+	}
+	keyXform := func(key ed25519.PublicKey) ed25519.PublicKey {
+		return address.SubnetForKey(key).GetKey()
+	}
+	if c.PacketConn, err = iwe.NewPacketConn(
+		c.secret,
+		iwn.WithBloomTransform(keyXform),
+		iwn.WithPeerMaxMessageSize(65535*2),
+		iwn.WithPathNotify(c.doPathNotify),
+	); err != nil {
+		return nil, fmt.Errorf("error creating encryption: %w", err)
 	}
 	c.proto.init(c)
 	if err := c.links.init(c); err != nil {
 		return nil, fmt.Errorf("error initialising links: %w", err)
 	}
+	for _, opt := range opts {
+		switch opt.(type) {
+		case Peer, ListenAddress:
+			// Now do the peers and listeners.
+			if err = c._applyOption(opt); err != nil {
+				return nil, fmt.Errorf("failed to apply configuration option %T: %w", opt, err)
+			}
+		default:
+			continue
+		}
+	}
 	if err := c.proto.nodeinfo.setNodeInfo(c.config.nodeinfo, bool(c.config.nodeinfoPrivacy)); err != nil {
 		return nil, fmt.Errorf("error setting node info: %w", err)
 	}
@@ -86,46 +128,22 @@ func New(secret ed25519.PrivateKey, logger Logger, opts ...SetupOption) (*Core,
 			c.log.Errorf("Invalid listener URI %q specified, ignoring\n", listenaddr)
 			continue
 		}
-		if _, err = c.links.listen(u, ""); err != nil {
+		if _, err = c.links.listen(u, "", false); err != nil {
 			c.log.Errorf("Failed to start listener %q: %s\n", listenaddr, err)
 		}
 	}
-	c.Act(nil, c._addPeerLoop)
 	return c, nil
 }
 
-// If any static peers were provided in the configuration above then we should
-// configure them. The loop ensures that disconnected peers will eventually
-// be reconnected with.
-func (c *Core) _addPeerLoop() {
-	select {
-	case <-c.ctx.Done():
-		return
-	default:
-	}
-	// Add peers from the Peers section
-	for peer := range c.config._peers {
-		go func(peer string, intf string) {
-			u, err := url.Parse(peer)
-			if err != nil {
-				c.log.Errorln("Failed to parse peer url:", peer, err)
-			}
-			if err := c.CallPeer(u, intf); err != nil {
-				c.log.Errorln("Failed to add peer:", err)
-			}
-		}(peer.URI, peer.SourceInterface) // TODO: this should be acted and not in a goroutine?
-	}
-
-	c.addPeerTimer = time.AfterFunc(time.Minute, func() {
-		c.Act(nil, c._addPeerLoop)
-	})
-}
-
 func (c *Core) RetryPeersNow() {
-	if c.addPeerTimer != nil && !c.addPeerTimer.Stop() {
+	phony.Block(&c.links, func() {
-		<-c.addPeerTimer.C
+		for _, l := range c.links._links {
-	}
+			select {
-	c.Act(nil, c._addPeerLoop)
+			case l.kick <- struct{}{}:
+			default:
+			}
+		}
+	})
 }
 
 // Stop shuts down the Yggdrasil node.
@@ -151,11 +169,16 @@ func (c *Core) _close() error {
 
 func (c *Core) MTU() uint64 {
 	const sessionTypeOverhead = 1
-	return c.PacketConn.MTU() - sessionTypeOverhead
+	MTU := c.PacketConn.MTU() - sessionTypeOverhead
+	if MTU > 65535 {
+		MTU = 65535
+	}
+	return MTU
 }
 
 func (c *Core) ReadFrom(p []byte) (n int, from net.Addr, err error) {
-	buf := make([]byte, c.PacketConn.MTU(), 65535)
+	buf := allocBytes(int(c.PacketConn.MTU()))
+	defer freeBytes(buf)
 	for {
 		bs := buf
 		n, from, err = c.PacketConn.ReadFrom(bs)
@@ -189,7 +212,8 @@ func (c *Core) ReadFrom(p []byte) (n int, from net.Addr, err error) {
 }
 
 func (c *Core) WriteTo(p []byte, addr net.Addr) (n int, err error) {
-	buf := make([]byte, 0, 65535)
+	buf := allocBytes(0)
+	defer func() { freeBytes(buf) }()
 	buf = append(buf, typeSessionTraffic)
 	buf = append(buf, p...)
 	n, err = c.PacketConn.WriteTo(buf, addr)
@@ -199,6 +223,20 @@ func (c *Core) WriteTo(p []byte, addr net.Addr) (n int, err error) {
 	return
 }
 
+func (c *Core) doPathNotify(key ed25519.PublicKey) {
+	c.Act(nil, func() {
+		if c.pathNotify != nil {
+			c.pathNotify(key)
+		}
+	})
+}
+
+func (c *Core) SetPathNotify(notify func(ed25519.PublicKey)) {
+	c.Act(nil, func() {
+		c.pathNotify = notify
+	})
+}
+
 type Logger interface {
 	Printf(string, ...interface{})
 	Println(...interface{})
@@ -210,4 +248,5 @@ type Logger interface {
 	Errorln(...interface{})
 	Debugf(string, ...interface{})
 	Debugln(...interface{})
+	Traceln(...interface{})
 }

src/core/core_test.go

@@ -2,14 +2,14 @@ package core
 
 import (
 	"bytes"
-	"crypto/ed25519"
+	"crypto/rand"
-	"math/rand"
 	"net/url"
 	"os"
 	"testing"
 	"time"
 
 	"github.com/gologme/log"
+	"github.com/yggdrasil-network/yggdrasil-go/src/config"
 )
 
 // GetLoggerWithPrefix creates a new logger instance with prefix.
@@ -25,33 +25,65 @@ func GetLoggerWithPrefix(prefix string, verbose bool) *log.Logger {
 	return l
 }
 
+func require_NoError(t *testing.T, err error) {
+	t.Helper()
+	if err != nil {
+		t.Fatal(err)
+	}
+}
+
+func require_Equal[T comparable](t *testing.T, a, b T) {
+	t.Helper()
+	if a != b {
+		t.Fatalf("%v != %v", a, b)
+	}
+}
+
+func require_True(t *testing.T, a bool) {
+	t.Helper()
+	if !a {
+		t.Fatal("expected true")
+	}
+}
+
 // CreateAndConnectTwo creates two nodes. nodeB connects to nodeA.
 // Verbosity flag is passed to logger.
 func CreateAndConnectTwo(t testing.TB, verbose bool) (nodeA *Core, nodeB *Core) {
 	var err error
-	var skA, skB ed25519.PrivateKey
+
-	if _, skA, err = ed25519.GenerateKey(nil); err != nil {
+	cfgA, cfgB := config.GenerateConfig(), config.GenerateConfig()
+	if err = cfgA.GenerateSelfSignedCertificate(); err != nil {
 		t.Fatal(err)
 	}
-	if _, skB, err = ed25519.GenerateKey(nil); err != nil {
+	if err = cfgB.GenerateSelfSignedCertificate(); err != nil {
-		t.Fatal(err)
-	}
-	logger := GetLoggerWithPrefix("", false)
-	if nodeA, err = New(skA, logger, ListenAddress("tcp://127.0.0.1:0")); err != nil {
-		t.Fatal(err)
-	}
-	if nodeB, err = New(skB, logger, ListenAddress("tcp://127.0.0.1:0")); err != nil {
 		t.Fatal(err)
 	}
 
-	u, err := url.Parse("tcp://" + nodeA.links.tcp.getAddr().String())
+	logger := GetLoggerWithPrefix("", false)
+	logger.EnableLevel("debug")
+
+	if nodeA, err = New(cfgA.Certificate, logger); err != nil {
+		t.Fatal(err)
+	}
+	if nodeB, err = New(cfgB.Certificate, logger); err != nil {
+		t.Fatal(err)
+	}
+
+	nodeAListenURL, err := url.Parse("tcp://localhost:0")
 	if err != nil {
 		t.Fatal(err)
 	}
-	err = nodeB.CallPeer(u, "")
+	nodeAListener, err := nodeA.Listen(nodeAListenURL, "")
 	if err != nil {
 		t.Fatal(err)
 	}
+	nodeAURL, err := url.Parse("tcp://" + nodeAListener.Addr().String())
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err = nodeB.CallPeer(nodeAURL, ""); err != nil {
+		t.Fatal(err)
+	}
 
 	time.Sleep(100 * time.Millisecond)
 
@@ -70,7 +102,13 @@ func WaitConnected(nodeA, nodeB *Core) bool {
 	// It may take up to 3 seconds, but let's wait 5.
 	for i := 0; i < 50; i++ {
 		time.Sleep(100 * time.Millisecond)
-		if len(nodeA.GetPeers()) > 0 && len(nodeB.GetPeers()) > 0 {
+		/*
+			if len(nodeA.GetPeers()) > 0 && len(nodeB.GetPeers()) > 0 {
+				return true
+			}
+		*/
+		if len(nodeA.GetTree()) > 1 && len(nodeB.GetTree()) > 1 {
+			time.Sleep(3 * time.Second) // FIXME hack, there's still stuff happening internally
 			return true
 		}
 	}
@@ -129,7 +167,7 @@ func TestCore_Start_Transfer(t *testing.T) {
 
 	// Send
 	msg := make([]byte, msgLen)
-	rand.Read(msg[40:])
+	_, _ = rand.Read(msg[40:])
 	msg[0] = 0x60
 	copy(msg[8:24], nodeB.Address())
 	copy(msg[24:40], nodeA.Address())
@@ -161,7 +199,7 @@ func BenchmarkCore_Start_Transfer(b *testing.B) {
 
 	// Send
 	msg := make([]byte, msgLen)
-	rand.Read(msg[40:])
+	_, _ = rand.Read(msg[40:])
 	msg[0] = 0x60
 	copy(msg[8:24], nodeB.Address())
 	copy(msg[24:40], nodeA.Address())
@@ -184,3 +222,69 @@ func BenchmarkCore_Start_Transfer(b *testing.B) {
 	}
 	<-done
 }
+
+func TestAllowedPublicKeys(t *testing.T) {
+	logger := GetLoggerWithPrefix("", false)
+	cfgA, cfgB := config.GenerateConfig(), config.GenerateConfig()
+	require_NoError(t, cfgA.GenerateSelfSignedCertificate())
+	require_NoError(t, cfgB.GenerateSelfSignedCertificate())
+
+	nodeA, err := New(cfgA.Certificate, logger, AllowedPublicKey("abcdef"))
+	require_NoError(t, err)
+	defer nodeA.Stop()
+
+	nodeB, err := New(cfgB.Certificate, logger)
+	require_NoError(t, err)
+	defer nodeB.Stop()
+
+	u, err := url.Parse("tcp://localhost:0")
+	require_NoError(t, err)
+
+	l, err := nodeA.Listen(u, "")
+	require_NoError(t, err)
+
+	u, err = url.Parse("tcp://" + l.Addr().String())
+	require_NoError(t, err)
+
+	require_NoError(t, nodeB.AddPeer(u, ""))
+
+	time.Sleep(time.Second)
+
+	peers := nodeB.GetPeers()
+	require_Equal(t, len(peers), 1)
+	require_True(t, !peers[0].Up)
+	require_True(t, peers[0].LastError != nil)
+}
+
+func TestAllowedPublicKeysLocal(t *testing.T) {
+	logger := GetLoggerWithPrefix("", false)
+	cfgA, cfgB := config.GenerateConfig(), config.GenerateConfig()
+	require_NoError(t, cfgA.GenerateSelfSignedCertificate())
+	require_NoError(t, cfgB.GenerateSelfSignedCertificate())
+
+	nodeA, err := New(cfgA.Certificate, logger, AllowedPublicKey("abcdef"))
+	require_NoError(t, err)
+	defer nodeA.Stop()
+
+	nodeB, err := New(cfgB.Certificate, logger)
+	require_NoError(t, err)
+	defer nodeB.Stop()
+
+	u, err := url.Parse("tcp://localhost:0")
+	require_NoError(t, err)
+
+	l, err := nodeA.ListenLocal(u, "")
+	require_NoError(t, err)
+
+	u, err = url.Parse("tcp://" + l.Addr().String())
+	require_NoError(t, err)
+
+	require_NoError(t, nodeB.AddPeer(u, ""))
+
+	time.Sleep(time.Second)
+
+	peers := nodeB.GetPeers()
+	require_Equal(t, len(peers), 1)
+	require_True(t, peers[0].Up)
+	require_True(t, peers[0].LastError == nil)
+}

src/core/debug.go

@@ -1,6 +1,3 @@
-//go:build debug
-// +build debug
-
 package core
 
 import (
@@ -8,28 +5,15 @@ import (
 	"net/http"
 	_ "net/http/pprof"
 	"os"
-	"runtime"
-
-	"github.com/gologme/log"
 )
 
-// Start the profiler in debug builds, if the required environment variable is set.
+// Start the profiler if the required environment variable is set.
 func init() {
 	envVarName := "PPROFLISTEN"
-	hostPort := os.Getenv(envVarName)
+	if hostPort := os.Getenv(envVarName); hostPort != "" {
-	switch {
-	case hostPort == "":
-		fmt.Fprintf(os.Stderr, "DEBUG: %s not set, profiler not started.\n", envVarName)
-	default:
 		fmt.Fprintf(os.Stderr, "DEBUG: Starting pprof on %s\n", hostPort)
-		go func() { fmt.Println(http.ListenAndServe(hostPort, nil)) }()
+		go func() {
+			fmt.Fprintf(os.Stderr, "DEBUG: %s", http.ListenAndServe(hostPort, nil))
+		}()
 	}
 }
-
-// Starts the function profiler. This is only supported when built with
-// '-tags build'.
-func StartProfiler(log *log.Logger) error {
-	runtime.SetBlockProfileRate(1)
-	go func() { log.Println(http.ListenAndServe("localhost:6060", nil)) }()
-	return nil
-}

src/core/link_quic.go

@@ -0,0 +1,108 @@
+package core
+
+import (
+	"context"
+	"crypto/tls"
+	"fmt"
+	"net"
+	"net/url"
+	"time"
+
+	"github.com/Arceliar/phony"
+	"github.com/quic-go/quic-go"
+)
+
+type linkQUIC struct {
+	phony.Inbox
+	*links
+	tlsconfig  *tls.Config
+	quicconfig *quic.Config
+}
+
+type linkQUICStream struct {
+	quic.Connection
+	quic.Stream
+}
+
+type linkQUICListener struct {
+	*quic.Listener
+	ch <-chan *linkQUICStream
+}
+
+func (l *linkQUICListener) Accept() (net.Conn, error) {
+	qs := <-l.ch
+	if qs == nil {
+		return nil, context.Canceled
+	}
+	return qs, nil
+}
+
+func (l *links) newLinkQUIC() *linkQUIC {
+	lt := &linkQUIC{
+		links:     l,
+		tlsconfig: l.core.config.tls.Clone(),
+		quicconfig: &quic.Config{
+			MaxIdleTimeout:  time.Minute,
+			KeepAlivePeriod: time.Second * 20,
+			TokenStore:      quic.NewLRUTokenStore(255, 255),
+		},
+	}
+	return lt
+}
+
+func (l *linkQUIC) dial(ctx context.Context, url *url.URL, info linkInfo, options linkOptions) (net.Conn, error) {
+	tlsconfig := l.tlsconfig.Clone()
+	return l.links.findSuitableIP(url, func(hostname string, ip net.IP, port int) (net.Conn, error) {
+		tlsconfig.ServerName = hostname
+		tlsconfig.MinVersion = tls.VersionTLS12
+		tlsconfig.MaxVersion = tls.VersionTLS13
+		hostport := net.JoinHostPort(ip.String(), fmt.Sprintf("%d", port))
+		qc, err := quic.DialAddr(ctx, hostport, l.tlsconfig, l.quicconfig)
+		if err != nil {
+			return nil, err
+		}
+		qs, err := qc.OpenStreamSync(ctx)
+		if err != nil {
+			return nil, err
+		}
+		return &linkQUICStream{
+			Connection: qc,
+			Stream:     qs,
+		}, nil
+	})
+}
+
+func (l *linkQUIC) listen(ctx context.Context, url *url.URL, _ string) (net.Listener, error) {
+	ql, err := quic.ListenAddr(url.Host, l.tlsconfig, l.quicconfig)
+	if err != nil {
+		return nil, err
+	}
+	ch := make(chan *linkQUICStream)
+	lql := &linkQUICListener{
+		Listener: ql,
+		ch:       ch,
+	}
+	go func() {
+		for {
+			qc, err := ql.Accept(ctx)
+			switch err {
+			case context.Canceled, context.DeadlineExceeded:
+				ql.Close()
+				fallthrough
+			case quic.ErrServerClosed:
+				return
+			case nil:
+				qs, err := qc.AcceptStream(ctx)
+				if err != nil {
+					_ = qc.CloseWithError(1, fmt.Sprintf("stream error: %s", err))
+					continue
+				}
+				ch <- &linkQUICStream{
+					Connection: qc,
+					Stream:     qs,
+				}
+			}
+		}
+	}()
+	return lql, nil
+}

src/core/link_socks.go

@@ -1,6 +1,8 @@
 package core
 
 import (
+	"context"
+	"crypto/tls"
 	"fmt"
 	"net"
 	"net/url"
@@ -20,37 +22,46 @@ func (l *links) newLinkSOCKS() *linkSOCKS {
 	return lt
 }
 
-func (l *linkSOCKS) dial(url *url.URL, options linkOptions) error {
+func (l *linkSOCKS) dial(_ context.Context, url *url.URL, info linkInfo, options linkOptions) (net.Conn, error) {
-	info := linkInfoFor("socks", "", url.Path)
+	var proxyAuth *proxy.Auth
-	if l.links.isConnectedTo(info) {
+	if url.User != nil && url.User.Username() != "" {
-		return nil
+		proxyAuth = &proxy.Auth{
+			User: url.User.Username(),
+		}
+		proxyAuth.Password, _ = url.User.Password()
 	}
-	proxyAuth := &proxy.Auth{}
+	tlsconfig := l.tls.config.Clone()
-	proxyAuth.User = url.User.Username()
+	return l.links.findSuitableIP(url, func(hostname string, ip net.IP, port int) (net.Conn, error) {
-	proxyAuth.Password, _ = url.User.Password()
+		hostport := net.JoinHostPort(ip.String(), fmt.Sprintf("%d", port))
-	dialer, err := proxy.SOCKS5("tcp", url.Host, proxyAuth, proxy.Direct)
+		dialer, err := l.tcp.dialerFor(&net.TCPAddr{
-	if err != nil {
+			IP:   ip,
-		return fmt.Errorf("failed to configure proxy")
+			Port: port,
-	}
+		}, info.sintf)
-	pathtokens := strings.Split(strings.Trim(url.Path, "/"), "/")
+		if err != nil {
-	conn, err := dialer.Dial("tcp", pathtokens[0])
+			return nil, err
-	if err != nil {
+		}
-		return err
+		proxy, err := proxy.SOCKS5("tcp", hostport, proxyAuth, dialer)
-	}
+		if err != nil {
-	dial := &linkDial{
+			return nil, err
-		url: url,
+		}
-	}
+		pathtokens := strings.Split(strings.Trim(url.Path, "/"), "/")
-	return l.handler(dial, info, conn, options, false)
+		conn, err := proxy.Dial("tcp", pathtokens[0])
+		if err != nil {
+			return nil, err
+		}
+		if url.Scheme == "sockstls" {
+			tlsconfig.ServerName = hostname
+			tlsconfig.MinVersion = tls.VersionTLS12
+			tlsconfig.MaxVersion = tls.VersionTLS13
+			if sni := options.tlsSNI; sni != "" {
+				tlsconfig.ServerName = sni
+			}
+			conn = tls.Client(conn, tlsconfig)
+		}
+		return conn, nil
+	})
 }
 
-func (l *linkSOCKS) handler(dial *linkDial, info linkInfo, conn net.Conn, options linkOptions, incoming bool) error {
+func (l *linkSOCKS) listen(ctx context.Context, url *url.URL, _ string) (net.Listener, error) {
-	return l.links.create(
+	return nil, fmt.Errorf("SOCKS listener not supported")
-		conn,              // connection
-		dial,              // connection URL
-		dial.url.String(), // connection name
-		info,              // connection info
-		incoming,          // not incoming
-		false,             // not forced
-		options,           // connection options
-	)
 }

src/core/link_tcp.go

@@ -5,7 +5,6 @@ import (
 	"fmt"
 	"net"
 	"net/url"
-	"strings"
 	"time"
 
 	"github.com/Arceliar/phony"
@@ -14,117 +13,42 @@ import (
 type linkTCP struct {
 	phony.Inbox
 	*links
-	listener   *net.ListenConfig
+	listenconfig *net.ListenConfig
-	_listeners map[*Listener]context.CancelFunc
 }
 
 func (l *links) newLinkTCP() *linkTCP {
 	lt := &linkTCP{
 		links: l,
-		listener: &net.ListenConfig{
+		listenconfig: &net.ListenConfig{
 			KeepAlive: -1,
 		},
-		_listeners: map[*Listener]context.CancelFunc{},
 	}
-	lt.listener.Control = lt.tcpContext
+	lt.listenconfig.Control = lt.tcpContext
 	return lt
 }
 
-func (l *linkTCP) dial(url *url.URL, options linkOptions, sintf string) error {
+func (l *linkTCP) dial(ctx context.Context, url *url.URL, info linkInfo, options linkOptions) (net.Conn, error) {
-	addr, err := net.ResolveTCPAddr("tcp", url.Host)
+	return l.links.findSuitableIP(url, func(hostname string, ip net.IP, port int) (net.Conn, error) {
-	if err != nil {
+		addr := &net.TCPAddr{
-		return err
+			IP:   ip,
-	}
+			Port: port,
-	dialer, err := l.dialerFor(addr, sintf)
+		}
-	if err != nil {
+		dialer, err := l.tcp.dialerFor(addr, info.sintf)
-		return err
+		if err != nil {
-	}
+			return nil, err
-	info := linkInfoFor("tcp", sintf, tcpIDFor(dialer.LocalAddr, addr))
+		}
-	if l.links.isConnectedTo(info) {
+		return dialer.DialContext(ctx, "tcp", addr.String())
-		return nil
+	})
-	}
-	conn, err := dialer.DialContext(l.core.ctx, "tcp", addr.String())
-	if err != nil {
-		return err
-	}
-	name := strings.TrimRight(strings.SplitN(url.String(), "?", 2)[0], "/")
-	dial := &linkDial{
-		url:   url,
-		sintf: sintf,
-	}
-	return l.handler(dial, name, info, conn, options, false, false)
 }
 
-func (l *linkTCP) listen(url *url.URL, sintf string) (*Listener, error) {
+func (l *linkTCP) listen(ctx context.Context, url *url.URL, sintf string) (net.Listener, error) {
-	ctx, cancel := context.WithCancel(l.core.ctx)
 	hostport := url.Host
 	if sintf != "" {
 		if host, port, err := net.SplitHostPort(hostport); err == nil {
 			hostport = fmt.Sprintf("[%s%%%s]:%s", host, sintf, port)
 		}
 	}
-	listener, err := l.listener.Listen(ctx, "tcp", hostport)
+	return l.listenconfig.Listen(ctx, "tcp", hostport)
-	if err != nil {
-		cancel()
-		return nil, err
-	}
-	entry := &Listener{
-		Listener: listener,
-		closed:   make(chan struct{}),
-	}
-	phony.Block(l, func() {
-		l._listeners[entry] = cancel
-	})
-	l.core.log.Printf("TCP listener started on %s", listener.Addr())
-	go func() {
-		defer phony.Block(l, func() {
-			delete(l._listeners, entry)
-		})
-		for {
-			conn, err := listener.Accept()
-			if err != nil {
-				cancel()
-				break
-			}
-			laddr := conn.LocalAddr().(*net.TCPAddr)
-			raddr := conn.RemoteAddr().(*net.TCPAddr)
-			name := fmt.Sprintf("tcp://%s", raddr)
-			info := linkInfoFor("tcp", sintf, tcpIDFor(laddr, raddr))
-			if err = l.handler(nil, name, info, conn, linkOptionsForListener(url), true, raddr.IP.IsLinkLocalUnicast()); err != nil {
-				l.core.log.Errorln("Failed to create inbound link:", err)
-			}
-		}
-		_ = listener.Close()
-		close(entry.closed)
-		l.core.log.Printf("TCP listener stopped on %s", listener.Addr())
-	}()
-	return entry, nil
-}
-
-func (l *linkTCP) handler(dial *linkDial, name string, info linkInfo, conn net.Conn, options linkOptions, incoming, force bool) error {
-	return l.links.create(
-		conn,     // connection
-		dial,     // connection URL
-		name,     // connection name
-		info,     // connection info
-		incoming, // not incoming
-		force,    // not forced
-		options,  // connection options
-	)
-}
-
-// Returns the address of the listener.
-func (l *linkTCP) getAddr() *net.TCPAddr {
-	// TODO: Fix this, because this will currently only give a single address
-	// to multicast.go, which obviously is not great, but right now multicast.go
-	// doesn't have the ability to send more than one address in a packet either
-	var addr *net.TCPAddr
-	phony.Block(l, func() {
-		for listener := range l._listeners {
-			addr = listener.Addr().(*net.TCPAddr)
-		}
-	})
-	return addr
 }
 
 func (l *linkTCP) dialerFor(dst *net.TCPAddr, sintf string) (*net.Dialer, error) {
@@ -185,16 +109,3 @@ func (l *linkTCP) dialerFor(dst *net.TCPAddr, sintf string) (*net.Dialer, error)
 	}
 	return dialer, nil
 }
-
-func tcpIDFor(local net.Addr, remoteAddr *net.TCPAddr) string {
-	if localAddr, ok := local.(*net.TCPAddr); ok && localAddr.IP.Equal(remoteAddr.IP) {
-		// Nodes running on the same host — include both the IP and port.
-		return remoteAddr.String()
-	}
-	if remoteAddr.IP.IsLinkLocalUnicast() {
-		// Nodes discovered via multicast — include the IP only.
-		return remoteAddr.IP.String()
-	}
-	// Nodes connected remotely — include both the IP and port.
-	return remoteAddr.String()
-}

src/core/link_tcp_darwin.go

@@ -28,6 +28,6 @@ func (t *linkTCP) tcpContext(network, address string, c syscall.RawConn) error {
 	}
 }
 
-func (t *linkTCP) getControl(sintf string) func(string, string, syscall.RawConn) error {
+func (t *linkTCP) getControl(_ string) func(string, string, syscall.RawConn) error {
 	return t.tcpContext
 }

src/core/link_tcp_linux.go

@@ -12,22 +12,6 @@ import (
 // WARNING: This context is used both by net.Dialer and net.Listen in tcp.go
 
 func (t *linkTCP) tcpContext(network, address string, c syscall.RawConn) error {
-	var control error
-	var bbr error
-
-	control = c.Control(func(fd uintptr) {
-		bbr = unix.SetsockoptString(int(fd), unix.IPPROTO_TCP, unix.TCP_CONGESTION, "bbr")
-	})
-
-	// Log any errors
-	if bbr != nil {
-		t.links.core.log.Debugln("Failed to set tcp_congestion_control to bbr for socket, SetsockoptString error:", bbr)
-	}
-	if control != nil {
-		t.links.core.log.Debugln("Failed to set tcp_congestion_control to bbr for socket, Control error:", control)
-	}
-
-	// Return nil because errors here are not considered fatal for the connection, it just means congestion control is suboptimal
 	return nil
 }
 

src/core/link_tls.go

@@ -1,20 +1,11 @@
 package core
 
 import (
-	"bytes"
 	"context"
-	"crypto/rand"
 	"crypto/tls"
-	"crypto/x509"
-	"crypto/x509/pkix"
-	"encoding/hex"
-	"encoding/pem"
 	"fmt"
-	"math/big"
 	"net"
 	"net/url"
-	"strings"
-	"time"
 
 	"github.com/Arceliar/phony"
 )
@@ -22,10 +13,9 @@ import (
 type linkTLS struct {
 	phony.Inbox
 	*links
-	tcp        *linkTCP
+	tcp      *linkTCP
-	listener   *net.ListenConfig
+	listener *net.ListenConfig
-	config     *tls.Config
+	config   *tls.Config
-	_listeners map[*Listener]context.CancelFunc
 }
 
 func (l *links) newLinkTLS(tcp *linkTCP) *linkTLS {
@@ -36,49 +26,37 @@ func (l *links) newLinkTLS(tcp *linkTCP) *linkTLS {
 			Control:   tcp.tcpContext,
 			KeepAlive: -1,
 		},
-		_listeners: map[*Listener]context.CancelFunc{},
+		config: l.core.config.tls.Clone(),
-	}
-	var err error
-	lt.config, err = lt.generateConfig()
-	if err != nil {
-		panic(err)
 	}
 	return lt
 }
 
-func (l *linkTLS) dial(url *url.URL, options linkOptions, sintf, sni string) error {
+func (l *linkTLS) dial(ctx context.Context, url *url.URL, info linkInfo, options linkOptions) (net.Conn, error) {
-	addr, err := net.ResolveTCPAddr("tcp", url.Host)
-	if err != nil {
-		return err
-	}
-	dialer, err := l.tcp.dialerFor(addr, sintf)
-	if err != nil {
-		return err
-	}
-	info := linkInfoFor("tls", sintf, tcpIDFor(dialer.LocalAddr, addr))
-	if l.links.isConnectedTo(info) {
-		return nil
-	}
 	tlsconfig := l.config.Clone()
-	tlsconfig.ServerName = sni
+	return l.links.findSuitableIP(url, func(hostname string, ip net.IP, port int) (net.Conn, error) {
-	tlsdialer := &tls.Dialer{
+		tlsconfig.ServerName = hostname
-		NetDialer: dialer,
+		tlsconfig.MinVersion = tls.VersionTLS12
-		Config:    tlsconfig,
+		tlsconfig.MaxVersion = tls.VersionTLS13
-	}
+		if sni := options.tlsSNI; sni != "" {
-	conn, err := tlsdialer.DialContext(l.core.ctx, "tcp", addr.String())
+			tlsconfig.ServerName = sni
-	if err != nil {
+		}
-		return err
+		addr := &net.TCPAddr{
-	}
+			IP:   ip,
-	name := strings.TrimRight(strings.SplitN(url.String(), "?", 2)[0], "/")
+			Port: port,
-	dial := &linkDial{
+		}
-		url:   url,
+		dialer, err := l.tcp.dialerFor(addr, info.sintf)
-		sintf: sintf,
+		if err != nil {
-	}
+			return nil, err
-	return l.handler(dial, name, info, conn, options, false, false)
+		}
+		tlsdialer := &tls.Dialer{
+			NetDialer: dialer,
+			Config:    tlsconfig,
+		}
+		return tlsdialer.DialContext(ctx, "tcp", addr.String())
+	})
 }
 
-func (l *linkTLS) listen(url *url.URL, sintf string) (*Listener, error) {
+func (l *linkTLS) listen(ctx context.Context, url *url.URL, sintf string) (net.Listener, error) {
-	ctx, cancel := context.WithCancel(l.core.ctx)
 	hostport := url.Host
 	if sintf != "" {
 		if host, port, err := net.SplitHostPort(hostport); err == nil {
@@ -87,88 +65,8 @@ func (l *linkTLS) listen(url *url.URL, sintf string) (*Listener, error) {
 	}
 	listener, err := l.listener.Listen(ctx, "tcp", hostport)
 	if err != nil {
-		cancel()
 		return nil, err
 	}
 	tlslistener := tls.NewListener(listener, l.config)
-	entry := &Listener{
+	return tlslistener, nil
-		Listener: tlslistener,
-		closed:   make(chan struct{}),
-	}
-	phony.Block(l, func() {
-		l._listeners[entry] = cancel
-	})
-	l.core.log.Printf("TLS listener started on %s", listener.Addr())
-	go func() {
-		defer phony.Block(l, func() {
-			delete(l._listeners, entry)
-		})
-		for {
-			conn, err := tlslistener.Accept()
-			if err != nil {
-				cancel()
-				break
-			}
-			laddr := conn.LocalAddr().(*net.TCPAddr)
-			raddr := conn.RemoteAddr().(*net.TCPAddr)
-			name := fmt.Sprintf("tls://%s", raddr)
-			info := linkInfoFor("tls", sintf, tcpIDFor(laddr, raddr))
-			if err = l.handler(nil, name, info, conn, linkOptionsForListener(url), true, raddr.IP.IsLinkLocalUnicast()); err != nil {
-				l.core.log.Errorln("Failed to create inbound link:", err)
-			}
-		}
-		_ = tlslistener.Close()
-		close(entry.closed)
-		l.core.log.Printf("TLS listener stopped on %s", listener.Addr())
-	}()
-	return entry, nil
-}
-
-// RFC5280 section 4.1.2.5
-var notAfterNeverExpires = time.Date(9999, time.December, 31, 23, 59, 59, 0, time.UTC)
-
-func (l *linkTLS) generateConfig() (*tls.Config, error) {
-	certBuf := &bytes.Buffer{}
-	cert := x509.Certificate{
-		SerialNumber: big.NewInt(1),
-		Subject: pkix.Name{
-			CommonName: hex.EncodeToString(l.links.core.public[:]),
-		},
-		NotBefore:             time.Now(),
-		NotAfter:              notAfterNeverExpires,
-		KeyUsage:              x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature,
-		ExtKeyUsage:           []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth},
-		BasicConstraintsValid: true,
-	}
-
-	certbytes, err := x509.CreateCertificate(rand.Reader, &cert, &cert, l.links.core.public, l.links.core.secret)
-	if err != nil {
-		return nil, err
-	}
-
-	if err := pem.Encode(certBuf, &pem.Block{
-		Type:  "CERTIFICATE",
-		Bytes: certbytes,
-	}); err != nil {
-		return nil, err
-	}
-
-	rootCAs := x509.NewCertPool()
-	rootCAs.AppendCertsFromPEM(certbytes)
-
-	return &tls.Config{
-		RootCAs: rootCAs,
-		Certificates: []tls.Certificate{
-			{
-				Certificate: [][]byte{certbytes},
-				PrivateKey:  l.links.core.secret,
-			},
-		},
-		InsecureSkipVerify: true,
-		MinVersion:         tls.VersionTLS13,
-	}, nil
-}
-
-func (l *linkTLS) handler(dial *linkDial, name string, info linkInfo, conn net.Conn, options linkOptions, incoming, force bool) error {
-	return l.tcp.handler(dial, name, info, conn, options, incoming, force)
 }

src/core/link_unix.go

@@ -12,9 +12,8 @@ import (
 type linkUNIX struct {
 	phony.Inbox
 	*links
-	dialer     *net.Dialer
+	dialer   *net.Dialer
-	listener   *net.ListenConfig
+	listener *net.ListenConfig
-	_listeners map[*Listener]context.CancelFunc
 }
 
 func (l *links) newLinkUNIX() *linkUNIX {
@@ -27,75 +26,18 @@ func (l *links) newLinkUNIX() *linkUNIX {
 		listener: &net.ListenConfig{
 			KeepAlive: -1,
 		},
-		_listeners: map[*Listener]context.CancelFunc{},
 	}
 	return lt
 }
 
-func (l *linkUNIX) dial(url *url.URL, options linkOptions, _ string) error {
+func (l *linkUNIX) dial(ctx context.Context, url *url.URL, info linkInfo, options linkOptions) (net.Conn, error) {
-	info := linkInfoFor("unix", "", url.Path)
-	if l.links.isConnectedTo(info) {
-		return nil
-	}
 	addr, err := net.ResolveUnixAddr("unix", url.Path)
 	if err != nil {
-		return err
-	}
-	conn, err := l.dialer.DialContext(l.core.ctx, "unix", addr.String())
-	if err != nil {
-		return err
-	}
-	dial := &linkDial{
-		url: url,
-	}
-	return l.handler(dial, url.String(), info, conn, options, false)
-}
-
-func (l *linkUNIX) listen(url *url.URL, _ string) (*Listener, error) {
-	ctx, cancel := context.WithCancel(l.core.ctx)
-	listener, err := l.listener.Listen(ctx, "unix", url.Path)
-	if err != nil {
-		cancel()
 		return nil, err
 	}
-	entry := &Listener{
+	return l.dialer.DialContext(ctx, "unix", addr.String())
-		Listener: listener,
-		closed:   make(chan struct{}),
-	}
-	phony.Block(l, func() {
-		l._listeners[entry] = cancel
-	})
-	l.core.log.Printf("UNIX listener started on %s", listener.Addr())
-	go func() {
-		defer phony.Block(l, func() {
-			delete(l._listeners, entry)
-		})
-		for {
-			conn, err := listener.Accept()
-			if err != nil {
-				cancel()
-				break
-			}
-			info := linkInfoFor("unix", "", url.String())
-			if err = l.handler(nil, url.String(), info, conn, linkOptionsForListener(url), true); err != nil {
-				l.core.log.Errorln("Failed to create inbound link:", err)
-			}
-		}
-		_ = listener.Close()
-		close(entry.closed)
-		l.core.log.Printf("UNIX listener stopped on %s", listener.Addr())
-	}()
-	return entry, nil
 }
 
-func (l *linkUNIX) handler(dial *linkDial, name string, info linkInfo, conn net.Conn, options linkOptions, incoming bool) error {
+func (l *linkUNIX) listen(ctx context.Context, url *url.URL, _ string) (net.Listener, error) {
-	return l.links.create(
+	return l.listener.Listen(ctx, "unix", url.Path)
-		conn,     // connection
-		dial,     // connection URL
-		name,     // connection name
-		info,     // connection info
-		incoming, // not incoming
-		false,    // not forced
-		options,  // connection options
-	)
 }

src/core/link_ws.go

@@ -0,0 +1,148 @@
+package core
+
+import (
+	"context"
+	"fmt"
+	"net"
+	"net/http"
+	"net/url"
+	"time"
+
+	"github.com/Arceliar/phony"
+	"github.com/coder/websocket"
+)
+
+type linkWS struct {
+	phony.Inbox
+	*links
+	listenconfig *net.ListenConfig
+}
+
+type linkWSConn struct {
+	net.Conn
+}
+
+type linkWSListener struct {
+	ch         chan *linkWSConn
+	ctx        context.Context
+	httpServer *http.Server
+	listener   net.Listener
+}
+
+type wsServer struct {
+	ch  chan *linkWSConn
+	ctx context.Context
+}
+
+func (l *linkWSListener) Accept() (net.Conn, error) {
+	qs := <-l.ch
+	if qs == nil {
+		return nil, context.Canceled
+	}
+	return qs, nil
+}
+
+func (l *linkWSListener) Addr() net.Addr {
+	return l.listener.Addr()
+}
+
+func (l *linkWSListener) Close() error {
+	if err := l.httpServer.Shutdown(l.ctx); err != nil {
+		return err
+	}
+	return l.listener.Close()
+}
+
+func (s *wsServer) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	if r.URL.Path == "/health" || r.URL.Path == "/healthz" {
+		w.WriteHeader(http.StatusOK)
+		_, _ = w.Write([]byte("OK"))
+		return
+	}
+
+	c, err := websocket.Accept(w, r, &websocket.AcceptOptions{
+		Subprotocols: []string{"ygg-ws"},
+	})
+	if err != nil {
+		return
+	}
+
+	if c.Subprotocol() != "ygg-ws" {
+		c.Close(websocket.StatusPolicyViolation, "client must speak the ygg-ws subprotocol")
+		return
+	}
+
+	s.ch <- &linkWSConn{
+		Conn: websocket.NetConn(s.ctx, c, websocket.MessageBinary),
+	}
+}
+
+func (l *links) newLinkWS() *linkWS {
+	lt := &linkWS{
+		links: l,
+		listenconfig: &net.ListenConfig{
+			KeepAlive: -1,
+		},
+	}
+	return lt
+}
+
+func (l *linkWS) dial(ctx context.Context, url *url.URL, info linkInfo, options linkOptions) (net.Conn, error) {
+	return l.links.findSuitableIP(url, func(hostname string, ip net.IP, port int) (net.Conn, error) {
+		u := *url
+		u.Host = net.JoinHostPort(ip.String(), fmt.Sprintf("%d", port))
+		addr := &net.TCPAddr{
+			IP:   ip,
+			Port: port,
+		}
+		dialer, err := l.tcp.dialerFor(addr, info.sintf)
+		if err != nil {
+			return nil, err
+		}
+		wsconn, _, err := websocket.Dial(ctx, u.String(), &websocket.DialOptions{
+			HTTPClient: &http.Client{
+				Transport: &http.Transport{
+					Proxy:       http.ProxyFromEnvironment,
+					Dial:        dialer.Dial,
+					DialContext: dialer.DialContext,
+				},
+			},
+			Subprotocols: []string{"ygg-ws"},
+			Host:         hostname,
+		})
+		if err != nil {
+			return nil, err
+		}
+		return &linkWSConn{
+			Conn: websocket.NetConn(ctx, wsconn, websocket.MessageBinary),
+		}, nil
+	})
+}
+
+func (l *linkWS) listen(ctx context.Context, url *url.URL, _ string) (net.Listener, error) {
+	nl, err := l.listenconfig.Listen(ctx, "tcp", url.Host)
+	if err != nil {
+		return nil, err
+	}
+
+	ch := make(chan *linkWSConn)
+
+	httpServer := &http.Server{
+		Handler: &wsServer{
+			ch:  ch,
+			ctx: ctx,
+		},
+		BaseContext:  func(_ net.Listener) context.Context { return ctx },
+		ReadTimeout:  time.Second * 10,
+		WriteTimeout: time.Second * 10,
+	}
+
+	lwl := &linkWSListener{
+		ch:         ch,
+		ctx:        ctx,
+		httpServer: httpServer,
+		listener:   nl,
+	}
+	go lwl.httpServer.Serve(nl) // nolint:errcheck
+	return lwl, nil
+}

src/core/link_wss.go

@@ -0,0 +1,72 @@
+package core
+
+import (
+	"context"
+	"crypto/tls"
+	"fmt"
+	"net"
+	"net/http"
+	"net/url"
+
+	"github.com/Arceliar/phony"
+	"github.com/coder/websocket"
+)
+
+type linkWSS struct {
+	phony.Inbox
+	*links
+	tlsconfig *tls.Config
+}
+
+type linkWSSConn struct {
+	net.Conn
+}
+
+func (l *links) newLinkWSS() *linkWSS {
+	lwss := &linkWSS{
+		links:     l,
+		tlsconfig: l.core.config.tls.Clone(),
+	}
+	return lwss
+}
+
+func (l *linkWSS) dial(ctx context.Context, url *url.URL, info linkInfo, options linkOptions) (net.Conn, error) {
+	tlsconfig := l.tlsconfig.Clone()
+	return l.links.findSuitableIP(url, func(hostname string, ip net.IP, port int) (net.Conn, error) {
+		tlsconfig.ServerName = hostname
+		tlsconfig.MinVersion = tls.VersionTLS12
+		tlsconfig.MaxVersion = tls.VersionTLS13
+		u := *url
+		u.Host = net.JoinHostPort(ip.String(), fmt.Sprintf("%d", port))
+		addr := &net.TCPAddr{
+			IP:   ip,
+			Port: port,
+		}
+		dialer, err := l.tcp.dialerFor(addr, info.sintf)
+		if err != nil {
+			return nil, err
+		}
+		wsconn, _, err := websocket.Dial(ctx, u.String(), &websocket.DialOptions{
+			HTTPClient: &http.Client{
+				Transport: &http.Transport{
+					Proxy:           http.ProxyFromEnvironment,
+					Dial:            dialer.Dial,
+					DialContext:     dialer.DialContext,
+					TLSClientConfig: tlsconfig,
+				},
+			},
+			Subprotocols: []string{"ygg-ws"},
+			Host:         hostname,
+		})
+		if err != nil {
+			return nil, err
+		}
+		return &linkWSSConn{
+			Conn: websocket.NetConn(ctx, wsconn, websocket.MessageBinary),
+		}, nil
+	})
+}
+
+func (l *linkWSS) listen(ctx context.Context, url *url.URL, _ string) (net.Listener, error) {
+	return nil, fmt.Errorf("WSS listener not supported, use WS listener behind reverse proxy instead")
+}

src/core/options.go

@@ -2,14 +2,31 @@ package core
 
 import (
 	"crypto/ed25519"
+	"fmt"
+	"net"
+	"net/url"
 )
 
-func (c *Core) _applyOption(opt SetupOption) {
+func (c *Core) _applyOption(opt SetupOption) (err error) {
 	switch v := opt.(type) {
 	case Peer:
-		c.config._peers[v] = nil
+		u, err := url.Parse(v.URI)
+		if err != nil {
+			return fmt.Errorf("unable to parse peering URI: %w", err)
+		}
+		err = c.links.add(u, v.SourceInterface, linkTypePersistent)
+		switch err {
+		case ErrLinkAlreadyConfigured:
+			// Don't return this error, otherwise we'll panic at startup
+			// if there are multiple of the same peer configured
+			return nil
+		default:
+			return err
+		}
 	case ListenAddress:
 		c.config._listeners[v] = struct{}{}
+	case PeerFilter:
+		c.config.peerFilter = v
 	case NodeInfo:
 		c.config.nodeinfo = v
 	case NodeInfoPrivacy:
@@ -19,6 +36,7 @@ func (c *Core) _applyOption(opt SetupOption) {
 		copy(pk[:], v)
 		c.config._allowedPublicKeys[pk] = struct{}{}
 	}
+	return
 }
 
 type SetupOption interface {
@@ -33,9 +51,11 @@ type Peer struct {
 type NodeInfo map[string]interface{}
 type NodeInfoPrivacy bool
 type AllowedPublicKey ed25519.PublicKey
+type PeerFilter func(net.IP) bool
 
 func (a ListenAddress) isSetupOption()    {}
 func (a Peer) isSetupOption()             {}
 func (a NodeInfo) isSetupOption()         {}
 func (a NodeInfoPrivacy) isSetupOption()  {}
 func (a AllowedPublicKey) isSetupOption() {}
+func (a PeerFilter) isSetupOption()       {}

src/core/options_test.go

@@ -0,0 +1,41 @@
+package core
+
+import (
+	"net/url"
+	"testing"
+
+	"github.com/yggdrasil-network/yggdrasil-go/src/config"
+)
+
+// Tests that duplicate peers in the configuration file
+// won't cause an error when the node starts. Otherwise
+// we can panic unnecessarily.
+func TestDuplicatePeerAtStartup(t *testing.T) {
+	cfg := config.GenerateConfig()
+	for i := 0; i < 5; i++ {
+		cfg.Peers = append(cfg.Peers, "tcp://1.2.3.4:4321")
+	}
+	if _, err := New(cfg.Certificate, nil); err != nil {
+		t.Fatal(err)
+	}
+}
+
+// Tests that duplicate peers given to us through the
+// API will still error as expected, even if they didn't
+// at startup. We expect to notify the user through the
+// admin socket if they try to add a peer that is already
+// configured.
+func TestDuplicatePeerFromAPI(t *testing.T) {
+	cfg := config.GenerateConfig()
+	c, err := New(cfg.Certificate, nil)
+	if err != nil {
+		t.Fatal(err)
+	}
+	u, _ := url.Parse("tcp://1.2.3.4:4321")
+	if err := c.AddPeer(u, ""); err != nil {
+		t.Fatalf("Adding peer failed on first attempt: %s", err)
+	}
+	if err := c.AddPeer(u, ""); err == nil {
+		t.Fatalf("Adding peer should have failed on second attempt")
+	}
+}

src/core/pool.go

@@ -0,0 +1,17 @@
+package core
+
+import "sync"
+
+var bytePool = sync.Pool{New: func() interface{} { return []byte(nil) }}
+
+func allocBytes(size int) []byte {
+	bs := bytePool.Get().([]byte)
+	if cap(bs) < size {
+		bs = make([]byte, size)
+	}
+	return bs[:size]
+}
+
+func freeBytes(bs []byte) {
+	bytePool.Put(bs[:0]) //nolint:staticcheck
+}

src/core/proto.go

@@ -21,8 +21,8 @@ const (
 	typeDebugGetSelfResponse
 	typeDebugGetPeersRequest
 	typeDebugGetPeersResponse
-	typeDebugGetDHTRequest
+	typeDebugGetTreeRequest
-	typeDebugGetDHTResponse
+	typeDebugGetTreeResponse
 )
 
 type reqInfo struct {
@@ -40,7 +40,7 @@ type protoHandler struct {
 
 	selfRequests  map[keyArray]*reqInfo
 	peersRequests map[keyArray]*reqInfo
-	dhtRequests   map[keyArray]*reqInfo
+	treeRequests  map[keyArray]*reqInfo
 }
 
 func (p *protoHandler) init(core *Core) {
@@ -49,7 +49,7 @@ func (p *protoHandler) init(core *Core) {
 
 	p.selfRequests = make(map[keyArray]*reqInfo)
 	p.peersRequests = make(map[keyArray]*reqInfo)
-	p.dhtRequests = make(map[keyArray]*reqInfo)
+	p.treeRequests = make(map[keyArray]*reqInfo)
 }
 
 // Common functions
@@ -89,10 +89,10 @@ func (p *protoHandler) _handleDebug(key keyArray, bs []byte) {
 		p._handleGetPeersRequest(key)
 	case typeDebugGetPeersResponse:
 		p._handleGetPeersResponse(key, bs[1:])
-	case typeDebugGetDHTRequest:
+	case typeDebugGetTreeRequest:
-		p._handleGetDHTRequest(key)
+		p._handleGetTreeRequest(key)
-	case typeDebugGetDHTResponse:
+	case typeDebugGetTreeResponse:
-		p._handleGetDHTResponse(key, bs[1:])
+		p._handleGetTreeResponse(key, bs[1:])
 	}
 }
 
@@ -126,8 +126,8 @@ func (p *protoHandler) sendGetSelfRequest(key keyArray, callback func([]byte)) {
 func (p *protoHandler) _handleGetSelfRequest(key keyArray) {
 	self := p.core.GetSelf()
 	res := map[string]string{
-		"key":    hex.EncodeToString(self.Key[:]),
+		"key":             hex.EncodeToString(self.Key[:]),
-		"coords": fmt.Sprintf("%v", self.Coords),
+		"routing_entries": fmt.Sprintf("%v", self.RoutingEntries),
 	}
 	bs, err := json.Marshal(res) // FIXME this puts keys in base64, not hex
 	if err != nil {
@@ -188,47 +188,47 @@ func (p *protoHandler) _handleGetPeersResponse(key keyArray, bs []byte) {
 	}
 }
 
-// Get DHT
+// Get Tree
 
-func (p *protoHandler) sendGetDHTRequest(key keyArray, callback func([]byte)) {
+func (p *protoHandler) sendGetTreeRequest(key keyArray, callback func([]byte)) {
 	p.Act(nil, func() {
-		if info := p.dhtRequests[key]; info != nil {
+		if info := p.treeRequests[key]; info != nil {
 			info.timer.Stop()
-			delete(p.dhtRequests, key)
+			delete(p.treeRequests, key)
 		}
 		info := new(reqInfo)
 		info.callback = callback
 		info.timer = time.AfterFunc(time.Minute, func() {
 			p.Act(nil, func() {
-				if p.dhtRequests[key] == info {
+				if p.treeRequests[key] == info {
-					delete(p.dhtRequests, key)
+					delete(p.treeRequests, key)
 				}
 			})
 		})
-		p.dhtRequests[key] = info
+		p.treeRequests[key] = info
-		p._sendDebug(key, typeDebugGetDHTRequest, nil)
+		p._sendDebug(key, typeDebugGetTreeRequest, nil)
 	})
 }
 
-func (p *protoHandler) _handleGetDHTRequest(key keyArray) {
+func (p *protoHandler) _handleGetTreeRequest(key keyArray) {
-	dinfos := p.core.GetDHT()
+	dinfos := p.core.GetTree()
 	var bs []byte
 	for _, dinfo := range dinfos {
 		tmp := append(bs, dinfo.Key[:]...)
-		const responseOverhead = 2 // 1 debug type, 1 getdht type
+		const responseOverhead = 2 // 1 debug type, 1 gettree type
 		if uint64(len(tmp))+responseOverhead > p.core.MTU() {
 			break
 		}
 		bs = tmp
 	}
-	p._sendDebug(key, typeDebugGetDHTResponse, bs)
+	p._sendDebug(key, typeDebugGetTreeResponse, bs)
 }
 
-func (p *protoHandler) _handleGetDHTResponse(key keyArray, bs []byte) {
+func (p *protoHandler) _handleGetTreeResponse(key keyArray, bs []byte) {
-	if info := p.dhtRequests[key]; info != nil {
+	if info := p.treeRequests[key]; info != nil {
 		info.timer.Stop()
 		info.callback(bs)
-		delete(p.dhtRequests, key)
+		delete(p.treeRequests, key)
 	}
 }
 
@@ -251,15 +251,16 @@ func (p *protoHandler) getSelfHandler(in json.RawMessage) (interface{}, error) {
 	if kbs, err = hex.DecodeString(req.Key); err != nil {
 		return nil, err
 	}
+	if len(kbs) != ed25519.PublicKeySize {
+		return nil, fmt.Errorf("invalid public key length")
+	}
 	copy(key[:], kbs)
 	ch := make(chan []byte, 1)
 	p.sendGetSelfRequest(key, func(info []byte) {
 		ch <- info
 	})
-	timer := time.NewTimer(6 * time.Second)
-	defer timer.Stop()
 	select {
-	case <-timer.C:
+	case <-time.After(6 * time.Second):
 		return nil, errors.New("timeout")
 	case info := <-ch:
 		var msg json.RawMessage
@@ -291,15 +292,16 @@ func (p *protoHandler) getPeersHandler(in json.RawMessage) (interface{}, error)
 	if kbs, err = hex.DecodeString(req.Key); err != nil {
 		return nil, err
 	}
+	if len(kbs) != ed25519.PublicKeySize {
+		return nil, fmt.Errorf("invalid public key length")
+	}
 	copy(key[:], kbs)
 	ch := make(chan []byte, 1)
 	p.sendGetPeersRequest(key, func(info []byte) {
 		ch <- info
 	})
-	timer := time.NewTimer(6 * time.Second)
-	defer timer.Stop()
 	select {
-	case <-timer.C:
+	case <-time.After(6 * time.Second):
 		return nil, errors.New("timeout")
 	case info := <-ch:
 		ks := make(map[string][]string)
@@ -322,16 +324,16 @@ func (p *protoHandler) getPeersHandler(in json.RawMessage) (interface{}, error)
 	}
 }
 
-// Admin socket stuff for "Get DHT"
+// Admin socket stuff for "Get Tree"
 
-type DebugGetDHTRequest struct {
+type DebugGetTreeRequest struct {
 	Key string `json:"key"`
 }
 
-type DebugGetDHTResponse map[string]interface{}
+type DebugGetTreeResponse map[string]interface{}
 
-func (p *protoHandler) getDHTHandler(in json.RawMessage) (interface{}, error) {
+func (p *protoHandler) getTreeHandler(in json.RawMessage) (interface{}, error) {
-	var req DebugGetDHTRequest
+	var req DebugGetTreeRequest
 	if err := json.Unmarshal(in, &req); err != nil {
 		return nil, err
 	}
@@ -341,15 +343,16 @@ func (p *protoHandler) getDHTHandler(in json.RawMessage) (interface{}, error) {
 	if kbs, err = hex.DecodeString(req.Key); err != nil {
 		return nil, err
 	}
+	if len(kbs) != ed25519.PublicKeySize {
+		return nil, fmt.Errorf("invalid public key length")
+	}
 	copy(key[:], kbs)
 	ch := make(chan []byte, 1)
-	p.sendGetDHTRequest(key, func(info []byte) {
+	p.sendGetTreeRequest(key, func(info []byte) {
 		ch <- info
 	})
-	timer := time.NewTimer(6 * time.Second)
-	defer timer.Stop()
 	select {
-	case <-timer.C:
+	case <-time.After(6 * time.Second):
 		return nil, errors.New("timeout")
 	case info := <-ch:
 		ks := make(map[string][]string)
@@ -367,7 +370,7 @@ func (p *protoHandler) getDHTHandler(in json.RawMessage) (interface{}, error) {
 			return nil, err
 		}
 		ip := net.IP(address.AddrForKey(kbs)[:])
-		res := DebugGetDHTResponse{ip.String(): msg}
+		res := DebugGetTreeResponse{ip.String(): msg}
 		return res, nil
 	}
 }

src/core/tls.go

@@ -0,0 +1,29 @@
+package core
+
+import (
+	"crypto/tls"
+	"crypto/x509"
+)
+
+func (c *Core) generateTLSConfig(cert *tls.Certificate) (*tls.Config, error) {
+	config := &tls.Config{
+		Certificates: []tls.Certificate{*cert},
+		ClientAuth:   tls.NoClientCert,
+		GetClientCertificate: func(cri *tls.CertificateRequestInfo) (*tls.Certificate, error) {
+			return cert, nil
+		},
+		VerifyPeerCertificate: c.verifyTLSCertificate,
+		VerifyConnection:      c.verifyTLSConnection,
+		InsecureSkipVerify:    true,
+		MinVersion:            tls.VersionTLS13,
+	}
+	return config, nil
+}
+
+func (c *Core) verifyTLSCertificate(_ [][]byte, _ [][]*x509.Certificate) error {
+	return nil
+}
+
+func (c *Core) verifyTLSConnection(_ tls.ConnectionState) error {
+	return nil
+}

src/core/version.go

@@ -4,65 +4,166 @@ package core
 // Used in the initial connection setup and key exchange
 // Some of this could arguably go in wire.go instead
 
-import "crypto/ed25519"
+import (
+	"bytes"
+	"crypto/ed25519"
+	"encoding/binary"
+	"io"
+
+	"golang.org/x/crypto/blake2b"
+)
 
 // This is the version-specific metadata exchanged at the start of a connection.
 // It must always begin with the 4 bytes "meta" and a wire formatted uint64 major version number.
 // The current version also includes a minor version number, and the box/sig/link keys that need to be exchanged to open a connection.
 type version_metadata struct {
-	meta [4]byte
+	majorVer  uint16
-	ver  uint8 // 1 byte in this version
+	minorVer  uint16
-	// Everything after this point potentially depends on the version number, and is subject to change in future versions
+	publicKey ed25519.PublicKey
-	minorVer uint8 // 1 byte in this version
+	priority  uint8
-	key      ed25519.PublicKey
 }
 
+const (
+	ProtocolVersionMajor uint16 = 0
+	ProtocolVersionMinor uint16 = 5
+)
+
+// Once a major/minor version is released, it is not safe to change any of these
+// (including their ordering), it is only safe to add new ones.
+const (
+	metaVersionMajor uint16 = iota // uint16
+	metaVersionMinor               // uint16
+	metaPublicKey                  // [32]byte
+	metaPriority                   // uint8
+)
+
+type handshakeError string
+
+func (e handshakeError) Error() string { return string(e) }
+
+const ErrHandshakeInvalidPreamble = handshakeError("invalid handshake, remote side is not Yggdrasil")
+const ErrHandshakeInvalidLength = handshakeError("invalid handshake length, possible version mismatch")
+const ErrHandshakeInvalidPassword = handshakeError("invalid password supplied, check your config")
+const ErrHandshakeHashFailure = handshakeError("invalid hash length")
+const ErrHandshakeIncorrectPassword = handshakeError("password does not match remote side")
+
 // Gets a base metadata with no keys set, but with the correct version numbers.
 func version_getBaseMetadata() version_metadata {
 	return version_metadata{
-		meta:     [4]byte{'m', 'e', 't', 'a'},
+		majorVer: ProtocolVersionMajor,
-		ver:      0,
+		minorVer: ProtocolVersionMinor,
-		minorVer: 4,
 	}
 }
 
-// Gets the length of the metadata for this version, used to know how many bytes to read from the start of a connection.
-func version_getMetaLength() (mlen int) {
-	mlen += 4                     // meta
-	mlen++                        // ver, as long as it's < 127, which it is in this version
-	mlen++                        // minorVer, as long as it's < 127, which it is in this version
-	mlen += ed25519.PublicKeySize // key
-	return
-}
-
 // Encodes version metadata into its wire format.
-func (m *version_metadata) encode() []byte {
+func (m *version_metadata) encode(privateKey ed25519.PrivateKey, password []byte) ([]byte, error) {
-	bs := make([]byte, 0, version_getMetaLength())
+	bs := make([]byte, 0, 64)
-	bs = append(bs, m.meta[:]...)
+	bs = append(bs, 'm', 'e', 't', 'a')
-	bs = append(bs, m.ver)
+	bs = append(bs, 0, 0) // Remaining message length
-	bs = append(bs, m.minorVer)
+
-	bs = append(bs, m.key[:]...)
+	bs = binary.BigEndian.AppendUint16(bs, metaVersionMajor)
-	if len(bs) != version_getMetaLength() {
+	bs = binary.BigEndian.AppendUint16(bs, 2)
-		panic("Inconsistent metadata length")
+	bs = binary.BigEndian.AppendUint16(bs, m.majorVer)
+
+	bs = binary.BigEndian.AppendUint16(bs, metaVersionMinor)
+	bs = binary.BigEndian.AppendUint16(bs, 2)
+	bs = binary.BigEndian.AppendUint16(bs, m.minorVer)
+
+	bs = binary.BigEndian.AppendUint16(bs, metaPublicKey)
+	bs = binary.BigEndian.AppendUint16(bs, ed25519.PublicKeySize)
+	bs = append(bs, m.publicKey[:]...)
+
+	bs = binary.BigEndian.AppendUint16(bs, metaPriority)
+	bs = binary.BigEndian.AppendUint16(bs, 1)
+	bs = append(bs, m.priority)
+
+	hasher, err := blake2b.New512(password)
+	if err != nil {
+		return nil, err
 	}
-	return bs
+	n, err := hasher.Write(m.publicKey)
+	if err != nil {
+		return nil, err
+	}
+	if n != ed25519.PublicKeySize {
+		return nil, ErrHandshakeHashFailure
+	}
+	hash := hasher.Sum(nil)
+	bs = append(bs, ed25519.Sign(privateKey, hash)...)
+
+	binary.BigEndian.PutUint16(bs[4:6], uint16(len(bs)-6))
+	return bs, nil
 }
 
 // Decodes version metadata from its wire format into the struct.
-func (m *version_metadata) decode(bs []byte) bool {
+func (m *version_metadata) decode(r io.Reader, password []byte) error {
-	if len(bs) != version_getMetaLength() {
+	bh := [6]byte{}
-		return false
+	if _, err := io.ReadFull(r, bh[:]); err != nil {
+		return err
 	}
-	offset := 0
+	meta := [4]byte{'m', 'e', 't', 'a'}
-	offset += copy(m.meta[:], bs[offset:])
+	if !bytes.Equal(bh[:4], meta[:]) {
-	m.ver, offset = bs[offset], offset+1
+		return ErrHandshakeInvalidPreamble
-	m.minorVer, offset = bs[offset], offset+1
+	}
-	m.key = append([]byte(nil), bs[offset:]...)
+	hl := binary.BigEndian.Uint16(bh[4:6])
-	return true
+	if hl < ed25519.SignatureSize {
+		return ErrHandshakeInvalidLength
+	}
+	bs := make([]byte, hl)
+	if _, err := io.ReadFull(r, bs); err != nil {
+		return err
+	}
+	sig := bs[len(bs)-ed25519.SignatureSize:]
+	bs = bs[:len(bs)-ed25519.SignatureSize]
+
+	for len(bs) >= 4 {
+		op := binary.BigEndian.Uint16(bs[:2])
+		oplen := binary.BigEndian.Uint16(bs[2:4])
+		if bs = bs[4:]; len(bs) < int(oplen) {
+			break
+		}
+		switch op {
+		case metaVersionMajor:
+			m.majorVer = binary.BigEndian.Uint16(bs[:2])
+
+		case metaVersionMinor:
+			m.minorVer = binary.BigEndian.Uint16(bs[:2])
+
+		case metaPublicKey:
+			m.publicKey = make(ed25519.PublicKey, ed25519.PublicKeySize)
+			copy(m.publicKey, bs[:ed25519.PublicKeySize])
+
+		case metaPriority:
+			m.priority = bs[0]
+		}
+		bs = bs[oplen:]
+	}
+
+	hasher, err := blake2b.New512(password)
+	if err != nil {
+		return ErrHandshakeInvalidPassword
+	}
+	n, err := hasher.Write(m.publicKey)
+	if err != nil || n != ed25519.PublicKeySize {
+		return ErrHandshakeHashFailure
+	}
+	hash := hasher.Sum(nil)
+	if !ed25519.Verify(m.publicKey, hash, sig) {
+		return ErrHandshakeIncorrectPassword
+	}
+	return nil
 }
 
 // Checks that the "meta" bytes and the version numbers are the expected values.
 func (m *version_metadata) check() bool {
-	base := version_getBaseMetadata()
+	switch {
-	return base.meta == m.meta && base.ver == m.ver && base.minorVer == m.minorVer
+	case m.majorVer != ProtocolVersionMajor:
+		return false
+	case m.minorVer != ProtocolVersionMinor:
+		return false
+	case len(m.publicKey) != ed25519.PublicKeySize:
+		return false
+	default:
+		return true
+	}
 }

src/core/version_test.go

@@ -0,0 +1,78 @@
+package core
+
+import (
+	"bytes"
+	"crypto/ed25519"
+	"reflect"
+	"testing"
+)
+
+func TestVersionPasswordAuth(t *testing.T) {
+	for _, tt := range []struct {
+		password1 []byte // The password on node 1
+		password2 []byte // The password on node 2
+		allowed   bool   // Should the connection have been allowed?
+	}{
+		{nil, nil, true},                      // Allow:  No passwords (both nil)
+		{nil, []byte(""), true},               // Allow:  No passwords (mixed nil and empty string)
+		{nil, []byte("foo"), false},           // Reject: One node has a password, the other doesn't
+		{[]byte("foo"), []byte(""), false},    // Reject: One node has a password, the other doesn't
+		{[]byte("foo"), []byte("foo"), true},  // Allow:  Same password
+		{[]byte("foo"), []byte("bar"), false}, // Reject: Different passwords
+	} {
+		pk1, sk1, err := ed25519.GenerateKey(nil)
+		if err != nil {
+			t.Fatalf("Node 1 failed to generate key: %s", err)
+		}
+
+		metadata1 := &version_metadata{
+			publicKey: pk1,
+		}
+		encoded, err := metadata1.encode(sk1, tt.password1)
+		if err != nil {
+			t.Fatalf("Node 1 failed to encode metadata: %s", err)
+		}
+
+		var decoded version_metadata
+		if allowed := decoded.decode(bytes.NewBuffer(encoded), tt.password2) == nil; allowed != tt.allowed {
+			t.Fatalf("Permutation %q -> %q should have been %v but was %v", tt.password1, tt.password2, tt.allowed, allowed)
+		}
+	}
+}
+
+func TestVersionRoundtrip(t *testing.T) {
+	for _, password := range [][]byte{
+		nil, []byte(""), []byte("foo"),
+	} {
+		for _, test := range []*version_metadata{
+			{majorVer: 1},
+			{majorVer: 256},
+			{majorVer: 2, minorVer: 4},
+			{majorVer: 2, minorVer: 257},
+			{majorVer: 258, minorVer: 259},
+			{majorVer: 3, minorVer: 5, priority: 6},
+			{majorVer: 260, minorVer: 261, priority: 7},
+		} {
+			// Generate a random public key for each time, since it is
+			// a required field.
+			pk, sk, err := ed25519.GenerateKey(nil)
+			if err != nil {
+				t.Fatal(err)
+			}
+
+			test.publicKey = pk
+			meta, err := test.encode(sk, password)
+			if err != nil {
+				t.Fatal(err)
+			}
+			encoded := bytes.NewBuffer(meta)
+			decoded := &version_metadata{}
+			if err := decoded.decode(encoded, password); err != nil {
+				t.Fatalf("failed to decode: %s", err)
+			}
+			if !reflect.DeepEqual(test, decoded) {
+				t.Fatalf("round-trip failed\nwant: %+v\n got: %+v", test, decoded)
+			}
+		}
+	}
+}

src/defaults/defaults.go

@@ -1,60 +0,0 @@
-package defaults
-
-import "github.com/yggdrasil-network/yggdrasil-go/src/config"
-
-type MulticastInterfaceConfig = config.MulticastInterfaceConfig
-
-var defaultConfig = ""      // LDFLAGS='-X github.com/yggdrasil-network/yggdrasil-go/src/defaults.defaultConfig=/path/to/config
-var defaultAdminListen = "" // LDFLAGS='-X github.com/yggdrasil-network/yggdrasil-go/src/defaults.defaultAdminListen=unix://path/to/sock'
-
-// Defines which parameters are expected by default for configuration on a
-// specific platform. These values are populated in the relevant defaults_*.go
-// for the platform being targeted. They must be set.
-type platformDefaultParameters struct {
-	// Admin socket
-	DefaultAdminListen string
-
-	// Configuration (used for yggdrasilctl)
-	DefaultConfigFile string
-
-	// Multicast interfaces
-	DefaultMulticastInterfaces []MulticastInterfaceConfig
-
-	// TUN
-	MaximumIfMTU  uint64
-	DefaultIfMTU  uint64
-	DefaultIfName string
-}
-
-func GetDefaults() platformDefaultParameters {
-	defaults := getDefaults()
-	if defaultConfig != "" {
-		defaults.DefaultConfigFile = defaultConfig
-	}
-	if defaultAdminListen != "" {
-		defaults.DefaultAdminListen = defaultAdminListen
-	}
-	return defaults
-}
-
-// Generates default configuration and returns a pointer to the resulting
-// NodeConfig. This is used when outputting the -genconf parameter and also when
-// using -autoconf.
-func GenerateConfig() *config.NodeConfig {
-	// Get the defaults for the platform.
-	defaults := GetDefaults()
-	// Create a node configuration and populate it.
-	cfg := new(config.NodeConfig)
-	cfg.NewKeys()
-	cfg.Listen = []string{}
-	cfg.AdminListen = defaults.DefaultAdminListen
-	cfg.Peers = []string{}
-	cfg.InterfacePeers = map[string][]string{}
-	cfg.AllowedPublicKeys = []string{}
-	cfg.MulticastInterfaces = defaults.DefaultMulticastInterfaces
-	cfg.IfName = defaults.DefaultIfName
-	cfg.IfMTU = defaults.DefaultIfMTU
-	cfg.NodeInfoPrivacy = false
-
-	return cfg
-}

src/ipv6rwc/ipv6rwc.go

@@ -19,12 +19,14 @@ import (
 
 const keyStoreTimeout = 2 * time.Minute
 
+/*
 // Out-of-band packet types
 const (
 	typeKeyDummy = iota // nolint:deadcode,varcheck
 	typeKeyLookup
 	typeKeyResponse
 )
+*/
 
 type keyArray [ed25519.PublicKeySize]byte
 
@@ -57,10 +59,13 @@ func (k *keyStore) init(c *core.Core) {
 	k.core = c
 	k.address = *address.AddrForKey(k.core.PublicKey())
 	k.subnet = *address.SubnetForKey(k.core.PublicKey())
-	if err := k.core.SetOutOfBandHandler(k.oobHandler); err != nil {
+	/*if err := k.core.SetOutOfBandHandler(k.oobHandler); err != nil {
 		err = fmt.Errorf("tun.core.SetOutOfBandHander: %w", err)
 		panic(err)
-	}
+	}*/
+	k.core.SetPathNotify(func(key ed25519.PublicKey) {
+		k.update(key)
+	})
 	k.keyToInfo = make(map[keyArray]*keyInfo)
 	k.addrToInfo = make(map[address.Address]*keyInfo)
 	k.addrBuffer = make(map[address.Address]*buffer)
@@ -177,7 +182,8 @@ func (k *keyStore) resetTimeout(info *keyInfo) {
 	})
 }
 
-func (k *keyStore) oobHandler(fromKey, toKey ed25519.PublicKey, data []byte) {
+/*
+func (k *keyStore) oobHandler(fromKey, toKey ed25519.PublicKey, data []byte) { // nolint:unused
 	if len(data) != 1+ed25519.SignatureSize {
 		return
 	}
@@ -198,18 +204,26 @@ func (k *keyStore) oobHandler(fromKey, toKey ed25519.PublicKey, data []byte) {
 		}
 	}
 }
+*/
 
 func (k *keyStore) sendKeyLookup(partial ed25519.PublicKey) {
-	sig := ed25519.Sign(k.core.PrivateKey(), partial[:])
+	/*
-	bs := append([]byte{typeKeyLookup}, sig...)
+		sig := ed25519.Sign(k.core.PrivateKey(), partial[:])
-	_ = k.core.SendOutOfBand(partial, bs)
+		bs := append([]byte{typeKeyLookup}, sig...)
+		//_ = k.core.SendOutOfBand(partial, bs)
+		_ = bs
+	*/
+	k.core.SendLookup(partial)
 }
 
-func (k *keyStore) sendKeyResponse(dest ed25519.PublicKey) {
+/*
+func (k *keyStore) sendKeyResponse(dest ed25519.PublicKey) { // nolint:unused
 	sig := ed25519.Sign(k.core.PrivateKey(), dest[:])
 	bs := append([]byte{typeKeyResponse}, sig...)
-	_ = k.core.SendOutOfBand(dest, bs)
+	//_ = k.core.SendOutOfBand(dest, bs)
+	_ = bs
 }
+*/
 
 func (k *keyStore) readPC(p []byte) (int, error) {
 	buf := make([]byte, k.core.MTU(), 65535)

src/multicast/admin.go

@@ -2,20 +2,47 @@ package multicast
 
 import (
 	"encoding/json"
+	"slices"
+	"strings"
 
+	"github.com/Arceliar/phony"
 	"github.com/yggdrasil-network/yggdrasil-go/src/admin"
 )
 
 type GetMulticastInterfacesRequest struct{}
 type GetMulticastInterfacesResponse struct {
-	Interfaces []string `json:"multicast_interfaces"`
+	Interfaces []MulticastInterfaceState `json:"multicast_interfaces"`
 }
 
-func (m *Multicast) getMulticastInterfacesHandler(req *GetMulticastInterfacesRequest, res *GetMulticastInterfacesResponse) error {
+type MulticastInterfaceState struct {
-	res.Interfaces = []string{}
+	Name     string `json:"name"`
-	for _, v := range m.Interfaces() {
+	Address  string `json:"address"`
-		res.Interfaces = append(res.Interfaces, v.Name)
+	Beacon   bool   `json:"beacon"`
-	}
+	Listen   bool   `json:"listen"`
+	Password bool   `json:"password"`
+}
+
+func (m *Multicast) getMulticastInterfacesHandler(_ *GetMulticastInterfacesRequest, res *GetMulticastInterfacesResponse) error {
+	res.Interfaces = []MulticastInterfaceState{}
+	phony.Block(m, func() {
+		for name, intf := range m._interfaces {
+			is := MulticastInterfaceState{
+				Name:     intf.iface.Name,
+				Beacon:   intf.beacon,
+				Listen:   intf.listen,
+				Password: len(intf.password) > 0,
+			}
+			if li := m._listeners[name]; li != nil && li.listener != nil {
+				is.Address = li.listener.Addr().String()
+			} else {
+				is.Address = "-"
+			}
+			res.Interfaces = append(res.Interfaces, is)
+		}
+	})
+	slices.SortStableFunc(res.Interfaces, func(a, b MulticastInterfaceState) int {
+		return strings.Compare(a.Name, b.Name)
+	})
 	return nil
 }
 

src/multicast/advertisement.go

@@ -0,0 +1,39 @@
+package multicast
+
+import (
+	"crypto/ed25519"
+	"encoding/binary"
+	"fmt"
+)
+
+type multicastAdvertisement struct {
+	MajorVersion uint16
+	MinorVersion uint16
+	PublicKey    ed25519.PublicKey
+	Port         uint16
+	Hash         []byte
+}
+
+func (m *multicastAdvertisement) MarshalBinary() ([]byte, error) {
+	b := make([]byte, 0, ed25519.PublicKeySize+8+len(m.Hash))
+	b = binary.BigEndian.AppendUint16(b, m.MajorVersion)
+	b = binary.BigEndian.AppendUint16(b, m.MinorVersion)
+	b = append(b, m.PublicKey...)
+	b = binary.BigEndian.AppendUint16(b, m.Port)
+	b = binary.BigEndian.AppendUint16(b, uint16(len(m.Hash)))
+	b = append(b, m.Hash...)
+	return b, nil
+}
+
+func (m *multicastAdvertisement) UnmarshalBinary(b []byte) error {
+	if len(b) < ed25519.PublicKeySize+8 {
+		return fmt.Errorf("invalid multicast beacon")
+	}
+	m.MajorVersion = binary.BigEndian.Uint16(b[0:2])
+	m.MinorVersion = binary.BigEndian.Uint16(b[2:4])
+	m.PublicKey = append(m.PublicKey[:0], b[4:4+ed25519.PublicKeySize]...)
+	m.Port = binary.BigEndian.Uint16(b[4+ed25519.PublicKeySize : 6+ed25519.PublicKeySize])
+	dl := binary.BigEndian.Uint16(b[6+ed25519.PublicKeySize : 8+ed25519.PublicKeySize])
+	m.Hash = append(m.Hash[:0], b[8+ed25519.PublicKeySize:8+ed25519.PublicKeySize+dl]...)
+	return nil
+}

src/multicast/advertisement_test.go

@@ -0,0 +1,38 @@
+package multicast
+
+import (
+	"crypto/ed25519"
+	"reflect"
+	"testing"
+)
+
+func TestMulticastAdvertisementRoundTrip(t *testing.T) {
+	pk, sk, err := ed25519.GenerateKey(nil)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	orig := multicastAdvertisement{
+		MajorVersion: 1,
+		MinorVersion: 2,
+		PublicKey:    pk,
+		Port:         3,
+		Hash:         sk, // any bytes will do
+	}
+
+	ob, err := orig.MarshalBinary()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	var new multicastAdvertisement
+	if err := new.UnmarshalBinary(ob); err != nil {
+		t.Fatal(err)
+	}
+
+	if !reflect.DeepEqual(orig, new) {
+		t.Logf("original: %+v", orig)
+		t.Logf("new:      %+v", new)
+		t.Fatalf("differences found after round-trip")
+	}
+}

src/multicast/multicast.go

@@ -4,17 +4,20 @@ import (
 	"bytes"
 	"context"
 	"crypto/ed25519"
-	"encoding/binary"
 	"encoding/hex"
 	"fmt"
+	"math/rand"
 	"net"
 	"net/url"
+	"sync/atomic"
 	"time"
 
 	"github.com/Arceliar/phony"
 	"github.com/gologme/log"
+	"github.com/wlynxg/anet"
 
 	"github.com/yggdrasil-network/yggdrasil-go/src/core"
+	"golang.org/x/crypto/blake2b"
 	"golang.org/x/net/ipv6"
 )
 
@@ -27,7 +30,7 @@ type Multicast struct {
 	core        *core.Core
 	log         *log.Logger
 	sock        *ipv6.PacketConn
-	_isOpen     bool
+	running     atomic.Bool
 	_listeners  map[string]*listenerInfo
 	_interfaces map[string]*interfaceInfo
 	_timer      *time.Timer
@@ -44,6 +47,8 @@ type interfaceInfo struct {
 	listen   bool
 	port     uint16
 	priority uint8
+	password []byte
+	hash     []byte
 }
 
 type listenerInfo struct {
@@ -76,7 +81,7 @@ func New(core *core.Core, log *log.Logger, opts ...SetupOption) (*Multicast, err
 }
 
 func (m *Multicast) _start() error {
-	if m._isOpen {
+	if !m.running.CompareAndSwap(false, true) {
 		return fmt.Errorf("multicast module is already started")
 	}
 	var anyEnabled bool
@@ -84,12 +89,14 @@ func (m *Multicast) _start() error {
 		anyEnabled = anyEnabled || intf.Beacon || intf.Listen
 	}
 	if !anyEnabled {
+		m.running.Store(false)
 		return nil
 	}
 	m.log.Debugln("Starting multicast module")
 	defer m.log.Debugln("Started multicast module")
 	addr, err := net.ResolveUDPAddr("udp", string(m.config._groupAddr))
 	if err != nil {
+		m.running.Store(false)
 		return err
 	}
 	listenString := fmt.Sprintf("[::]:%v", addr.Port)
@@ -98,6 +105,7 @@ func (m *Multicast) _start() error {
 	}
 	conn, err := lc.ListenPacket(context.Background(), "udp6", listenString)
 	if err != nil {
+		m.running.Store(false)
 		return err
 	}
 	m.sock = ipv6.NewPacketConn(conn)
@@ -105,7 +113,6 @@ func (m *Multicast) _start() error {
 		// Windows can't set this flag, so we need to handle it in other ways
 	}
 
-	m._isOpen = true
 	go m.listen()
 	m.Act(nil, m._multicastStarted)
 	m.Act(nil, m._announce)
@@ -115,11 +122,7 @@ func (m *Multicast) _start() error {
 
 // IsStarted returns true if the module has been started.
 func (m *Multicast) IsStarted() bool {
-	var isOpen bool
+	return m.running.Load()
-	phony.Block(m, func() {
-		isOpen = m._isOpen
-	})
-	return isOpen
 }
 
 // Stop stops the multicast module.
@@ -133,8 +136,10 @@ func (m *Multicast) Stop() error {
 }
 
 func (m *Multicast) _stop() error {
+	if !m.running.CompareAndSwap(true, false) {
+		return nil
+	}
 	m.log.Infoln("Stopping multicast module")
-	m._isOpen = false
 	if m.sock != nil {
 		m.sock.Close()
 	}
@@ -144,14 +149,22 @@ func (m *Multicast) _stop() error {
 func (m *Multicast) _updateInterfaces() {
 	interfaces := m._getAllowedInterfaces()
 	for name, info := range interfaces {
-		addrs, err := info.iface.Addrs()
+		// 'anet' package is used here to avoid https://github.com/golang/go/issues/40569
+		addrs, err := anet.InterfaceAddrsByInterface(&info.iface)
 		if err != nil {
 			m.log.Warnf("Failed up get addresses for interface %s: %s", name, err)
 			delete(interfaces, name)
 			continue
 		}
-		info.addrs = addrs
+		for _, addr := range addrs {
+			addrIP, _, err := net.ParseCIDR(addr.String())
+			if err != nil || addrIP.To4() != nil || !addrIP.IsLinkLocalUnicast() {
+				continue
+			}
+			info.addrs = append(info.addrs, addr)
+		}
 		interfaces[name] = info
+		m.log.Debugf("Discovered addresses for interface %s: %s", name, addrs)
 	}
 	m._interfaces = interfaces
 }
@@ -170,17 +183,21 @@ func (m *Multicast) Interfaces() map[string]net.Interface {
 func (m *Multicast) _getAllowedInterfaces() map[string]*interfaceInfo {
 	interfaces := make(map[string]*interfaceInfo)
 	// Ask the system for network interfaces
-	allifaces, err := net.Interfaces()
+	// 'anet' package is used here to avoid https://github.com/golang/go/issues/40569
+	allifaces, err := anet.Interfaces()
 	if err != nil {
 		// Don't panic, since this may be from e.g. too many open files (from too much connection spam)
-		// TODO? log something
+		m.log.Debugf("Failed to get interfaces: %s", err)
 		return nil
 	}
 	// Work out which interfaces to announce on
+	pk := m.core.PublicKey()
 	for _, iface := range allifaces {
 		switch {
 		case iface.Flags&net.FlagUp == 0:
 			continue // Ignore interfaces that are down
+		case iface.Flags&net.FlagRunning == 0:
+			continue // Ignore interfaces that are not running
 		case iface.Flags&net.FlagMulticast == 0:
 			continue // Ignore non-multicast interfaces
 		case iface.Flags&net.FlagPointToPoint != 0:
@@ -195,12 +212,23 @@ func (m *Multicast) _getAllowedInterfaces() map[string]*interfaceInfo {
 			if !ifcfg.Regex.MatchString(iface.Name) {
 				continue
 			}
+			hasher, err := blake2b.New512([]byte(ifcfg.Password))
+			if err != nil {
+				continue
+			}
+			if n, err := hasher.Write(pk); err != nil {
+				continue
+			} else if n != ed25519.PublicKeySize {
+				continue
+			}
 			interfaces[iface.Name] = &interfaceInfo{
 				iface:    iface,
 				beacon:   ifcfg.Beacon,
 				listen:   ifcfg.Listen,
 				port:     ifcfg.Port,
 				priority: ifcfg.Priority,
+				password: []byte(ifcfg.Password),
+				hash:     hasher.Sum(nil),
 			}
 			break
 		}
@@ -218,7 +246,7 @@ func (m *Multicast) AnnounceNow() {
 }
 
 func (m *Multicast) _announce() {
-	if !m._isOpen {
+	if !m.running.Load() {
 		return
 	}
 	m._updateInterfaces()
@@ -235,7 +263,7 @@ func (m *Multicast) _announce() {
 	for name, info := range m._listeners {
 		// Prepare our stop function!
 		stop := func() {
-			info.listener.Close()
+			info.listener.Cancel()
 			delete(m._listeners, name)
 			m.log.Debugln("No longer multicasting on", name)
 		}
@@ -248,7 +276,7 @@ func (m *Multicast) _announce() {
 		// It's possible that the link-local listener address has changed so if
 		// that is the case then we should clean up the interface listener
 		found := false
-		listenaddr, err := net.ResolveTCPAddr("tcp6", info.listener.Listener.Addr().String())
+		listenaddr, err := net.ResolveTCPAddr("tcp6", info.listener.Addr().String())
 		if err != nil {
 			stop()
 			continue
@@ -277,13 +305,9 @@ func (m *Multicast) _announce() {
 	for _, info := range m._interfaces {
 		iface := info.iface
 		for _, addr := range info.addrs {
-			addrIP, _, _ := net.ParseCIDR(addr.String())
+			addrIP, _, err := net.ParseCIDR(addr.String())
-			// Ignore IPv4 addresses
+			// Ignore IPv4 addresses or non-link-local addresses
-			if addrIP.To4() != nil {
+			if err != nil || addrIP.To4() != nil || !addrIP.IsLinkLocalUnicast() {
-				continue
-			}
-			// Ignore non-link-local addresses
-			if !addrIP.IsLinkLocalUnicast() {
 				continue
 			}
 			if info.listen {
@@ -295,14 +319,17 @@ func (m *Multicast) _announce() {
 			}
 			// Try and see if we already have a TCP listener for this interface
 			var linfo *listenerInfo
-			if nfo, ok := m._listeners[iface.Name]; !ok || nfo.listener.Listener == nil {
+			if _, ok := m._listeners[iface.Name]; !ok {
 				// No listener was found - let's create one
-				urlString := fmt.Sprintf("tls://[%s]:%d", addrIP, info.port)
+				v := &url.Values{}
-				u, err := url.Parse(urlString)
+				v.Add("priority", fmt.Sprintf("%d", info.priority))
-				if err != nil {
+				v.Add("password", string(info.password))
-					panic(err)
+				u := &url.URL{
+					Scheme:   "tls",
+					Host:     net.JoinHostPort(addrIP.String(), fmt.Sprintf("%d", info.port)),
+					RawQuery: v.Encode(),
 				}
-				if li, err := m.core.Listen(u, iface.Name); err == nil {
+				if li, err := m.core.ListenLocal(u, iface.Name); err == nil {
 					m.log.Debugln("Started multicasting on", iface.Name)
 					// Store the listener so that we can stop it later if needed
 					linfo = &listenerInfo{listener: li, time: time.Now(), port: info.port}
@@ -321,25 +348,31 @@ func (m *Multicast) _announce() {
 			if time.Since(linfo.time) < linfo.interval {
 				continue
 			}
-			// Get the listener details and construct the multicast beacon
+			addr := linfo.listener.Addr().(*net.TCPAddr)
-			lladdr := linfo.listener.Listener.Addr().String()
+			adv := multicastAdvertisement{
-			if a, err := net.ResolveTCPAddr("tcp6", lladdr); err == nil {
+				MajorVersion: core.ProtocolVersionMajor,
-				a.Zone = ""
+				MinorVersion: core.ProtocolVersionMinor,
-				destAddr.Zone = iface.Name
+				PublicKey:    m.core.PublicKey(),
-				msg := append([]byte(nil), m.core.GetSelf().Key...)
+				Port:         uint16(addr.Port),
-				msg = append(msg, a.IP...)
+				Hash:         info.hash,
-				pbs := make([]byte, 2)
+			}
-				binary.BigEndian.PutUint16(pbs, uint16(a.Port))
+			msg, err := adv.MarshalBinary()
-				msg = append(msg, pbs...)
+			if err != nil {
-				_, _ = m.sock.WriteTo(msg, nil, destAddr)
+				continue
+			}
+			destAddr.Zone = iface.Name
+			if _, err = m.sock.WriteTo(msg, nil, destAddr); err != nil {
+				m.log.Warn("Failed to send multicast beacon:", err)
 			}
 			if linfo.interval.Seconds() < 15 {
 				linfo.interval += time.Second
 			}
+			linfo.time = time.Now()
 			break
 		}
 	}
-	m._timer = time.AfterFunc(time.Second, func() {
+	annInterval := time.Second + time.Microsecond*(time.Duration(rand.Intn(1048576))) // Randomize delay
+	m._timer = time.AfterFunc(annInterval, func() {
 		m.Act(nil, m._announce)
 	})
 }
@@ -350,8 +383,12 @@ func (m *Multicast) listen() {
 		panic(err)
 	}
 	bs := make([]byte, 2048)
+	hb := make([]byte, 0, blake2b.Size) // Reused to reduce hash allocations
 	for {
-		nBytes, rcm, fromAddr, err := m.sock.ReadFrom(bs)
+		if !m.running.Load() {
+			return
+		}
+		n, rcm, fromAddr, err := m.sock.ReadFrom(bs)
 		if err != nil {
 			if !m.IsStarted() {
 				return
@@ -369,40 +406,45 @@ func (m *Multicast) listen() {
 				continue
 			}
 		}
-		if nBytes < ed25519.PublicKeySize {
+		var adv multicastAdvertisement
+		if err := adv.UnmarshalBinary(bs[:n]); err != nil {
 			continue
 		}
-		var key ed25519.PublicKey
+		switch {
-		key = append(key, bs[:ed25519.PublicKeySize]...)
+		case adv.MajorVersion != core.ProtocolVersionMajor:
-		if bytes.Equal(key, m.core.GetSelf().Key) {
+			continue
-			continue // don't bother trying to peer with self
+		case adv.MinorVersion != core.ProtocolVersionMinor:
-		}
+			continue
-		begin := ed25519.PublicKeySize
+		case adv.PublicKey.Equal(m.core.PublicKey()):
-		end := nBytes - 2
-		if end <= begin {
-			continue // malformed address
-		}
-		ip := bs[begin:end]
-		port := binary.BigEndian.Uint16(bs[end:nBytes])
-		anAddr := net.TCPAddr{IP: ip, Port: int(port)}
-		addr, err := net.ResolveTCPAddr("tcp6", anAddr.String())
-		if err != nil {
 			continue
 		}
 		from := fromAddr.(*net.UDPAddr)
-		if !from.IP.Equal(addr.IP) {
+		from.Port = int(adv.Port)
-			continue
-		}
 		var interfaces map[string]*interfaceInfo
 		phony.Block(m, func() {
 			interfaces = m._interfaces
 		})
 		if info, ok := interfaces[from.Zone]; ok && info.listen {
-			addr.Zone = ""
+			hasher, err := blake2b.New512(info.password)
-			pin := fmt.Sprintf("/?key=%s&priority=%d", hex.EncodeToString(key), info.priority)
-			u, err := url.Parse("tls://" + addr.String() + pin)
 			if err != nil {
-				m.log.Debugln("Call from multicast failed, parse error:", addr.String(), err)
+				continue
+			}
+			if n, err := hasher.Write(adv.PublicKey); err != nil {
+				continue
+			} else if n != ed25519.PublicKeySize {
+				continue
+			}
+			if !bytes.Equal(hasher.Sum(hb[:0]), adv.Hash) {
+				continue
+			}
+			v := &url.Values{}
+			v.Add("key", hex.EncodeToString(adv.PublicKey))
+			v.Add("priority", fmt.Sprintf("%d", info.priority))
+			v.Add("password", string(info.password))
+			u := &url.URL{
+				Scheme:   "tls",
+				Host:     from.String(),
+				RawQuery: v.Encode(),
 			}
 			if err := m.core.CallPeer(u, from.Zone); err != nil {
 				m.log.Debugln("Call from multicast failed:", err)

src/multicast/multicast_darwin_cgo.go

@@ -31,7 +31,7 @@ import (
 )
 
 func (m *Multicast) _multicastStarted() {
-	if !m._isOpen {
+	if !m.running.Load() {
 		return
 	}
 	C.StopAWDLBrowsing()

src/multicast/options.go

@@ -21,6 +21,7 @@ type MulticastInterface struct {
 	Listen   bool
 	Port     uint16
 	Priority uint8
+	Password string
 }
 
 type GroupAddress string

src/tun/iface.go

@@ -1,42 +1,70 @@
 package tun
 
-const TUN_OFFSET_BYTES = 4
+import (
+	"errors"
+
+	wgtun "golang.zx2c4.com/wireguard/tun"
+)
+
+const TUN_OFFSET_BYTES = 80 // sizeof(virtio_net_hdr)
 
 func (tun *TunAdapter) read() {
-	var buf [TUN_OFFSET_BYTES + 65535]byte
+	vs := tun.iface.BatchSize()
+	bufs := make([][]byte, vs)
+	sizes := make([]int, vs)
+	for i := range bufs {
+		bufs[i] = make([]byte, TUN_OFFSET_BYTES+65535)
+	}
 	for {
-		n, err := tun.iface.Read(buf[:], TUN_OFFSET_BYTES)
+		n, err := tun.iface.Read(bufs, sizes, TUN_OFFSET_BYTES)
-		if n <= TUN_OFFSET_BYTES || err != nil {
+		if err != nil {
-			tun.log.Errorln("Error reading TUN:", err)
+			if errors.Is(err, wgtun.ErrTooManySegments) {
-			ferr := tun.iface.Flush()
+				tun.log.Debugln("TUN segments dropped: %v", err)
-			if ferr != nil {
+				continue
-				tun.log.Errorln("Unable to flush packets:", ferr)
 			}
+			tun.log.Errorln("Error reading TUN:", err)
 			return
 		}
-		begin := TUN_OFFSET_BYTES
+		for i, b := range bufs[:n] {
-		end := begin + n
+			if _, err := tun.rwc.Write(b[TUN_OFFSET_BYTES : TUN_OFFSET_BYTES+sizes[i]]); err != nil {
-		bs := buf[begin:end]
+				tun.log.Debugln("Unable to send packet:", err)
-		if _, err := tun.rwc.Write(bs); err != nil {
+			}
-			tun.log.Debugln("Unable to send packet:", err)
 		}
 	}
 }
 
-func (tun *TunAdapter) write() {
+func (tun *TunAdapter) queue() {
-	var buf [TUN_OFFSET_BYTES + 65535]byte
 	for {
-		bs := buf[TUN_OFFSET_BYTES:]
+		p := bufPool.Get().([]byte)[:bufPoolSize]
-		n, err := tun.rwc.Read(bs)
+		n, err := tun.rwc.Read(p)
 		if err != nil {
-			tun.log.Errorln("Exiting tun writer due to core read error:", err)
+			tun.log.Errorln("Exiting TUN writer due to core read error:", err)
 			return
 		}
+		tun.ch <- p[:n]
+	}
+}
+
+func (tun *TunAdapter) write() {
+	vs := cap(tun.ch)
+	bufs := make([][]byte, vs)
+	for i := range bufs {
+		bufs[i] = make([]byte, TUN_OFFSET_BYTES+65535)
+	}
+	for {
+		n := len(tun.ch)
+		if n == 0 {
+			n = 1 // Nothing queued up yet, wait for it instead
+		}
+		for i := 0; i < n; i++ {
+			msg := <-tun.ch
+			bufs[i] = append(bufs[i][:TUN_OFFSET_BYTES], msg...)
+			bufPool.Put(msg) // nolint:staticcheck
+		}
 		if !tun.isEnabled {
 			continue // Nothing to do, the tun isn't enabled
 		}
-		bs = buf[:TUN_OFFSET_BYTES+n]
+		if _, err := tun.iface.Write(bufs[:n], TUN_OFFSET_BYTES); err != nil {
-		if _, err = tun.iface.Write(bs, TUN_OFFSET_BYTES); err != nil {
 			tun.Act(nil, func() {
 				if !tun.isOpen {
 					tun.log.Errorln("TUN iface write error:", err)

src/tun/options.go

@@ -6,6 +6,8 @@ func (m *TunAdapter) _applyOption(opt SetupOption) {
 		m.config.name = v
 	case InterfaceMTU:
 		m.config.mtu = v
+	case FileDescriptor:
+		m.config.fd = int32(v)
 	}
 }
 
@@ -15,6 +17,8 @@ type SetupOption interface {
 
 type InterfaceName string
 type InterfaceMTU uint64
+type FileDescriptor int32
 
-func (a InterfaceName) isSetupOption() {}
+func (a InterfaceName) isSetupOption()  {}
-func (a InterfaceMTU) isSetupOption()  {}
+func (a InterfaceMTU) isSetupOption()   {}
+func (a FileDescriptor) isSetupOption() {}

src/tun/tun.go

@@ -8,42 +8,52 @@ package tun
 import (
 	"errors"
 	"fmt"
+	"io"
 	"net"
+	"sync"
 
 	"github.com/Arceliar/phony"
-	"golang.zx2c4.com/wireguard/tun"
+	wgtun "golang.zx2c4.com/wireguard/tun"
 
 	"github.com/yggdrasil-network/yggdrasil-go/src/address"
+	"github.com/yggdrasil-network/yggdrasil-go/src/config"
 	"github.com/yggdrasil-network/yggdrasil-go/src/core"
-	"github.com/yggdrasil-network/yggdrasil-go/src/defaults"
-	"github.com/yggdrasil-network/yggdrasil-go/src/ipv6rwc"
 )
 
 type MTU uint16
 
+type ReadWriteCloser interface {
+	io.ReadWriteCloser
+	Address() address.Address
+	Subnet() address.Subnet
+	MaxMTU() uint64
+	SetMTU(uint64)
+}
+
 // TunAdapter represents a running TUN interface and extends the
 // yggdrasil.Adapter type. In order to use the TUN adapter with Yggdrasil, you
 // should pass this object to the yggdrasil.SetRouterAdapter() function before
 // calling yggdrasil.Start().
 type TunAdapter struct {
-	rwc         *ipv6rwc.ReadWriteCloser
+	rwc         ReadWriteCloser
 	log         core.Logger
 	addr        address.Address
 	subnet      address.Subnet
 	mtu         uint64
-	iface       tun.Device
+	iface       wgtun.Device
 	phony.Inbox // Currently only used for _handlePacket from the reader, TODO: all the stuff that currently needs a mutex below
-	//mutex        sync.RWMutex // Protects the below
+	isOpen      bool
-	isOpen    bool
+	isEnabled   bool // Used by the writer to drop sessionTraffic if not enabled
-	isEnabled bool // Used by the writer to drop sessionTraffic if not enabled
+	config      struct {
-	config    struct {
+		fd   int32
 		name InterfaceName
 		mtu  InterfaceMTU
 	}
+	ch chan []byte
 }
 
 // Gets the maximum supported MTU for the platform based on the defaults in
-// defaults.GetDefaults().
+// config.GetDefaults().
 func getSupportedMTU(mtu uint64) uint64 {
 	if mtu < 1280 {
 		return 1280
@@ -72,25 +82,25 @@ func (tun *TunAdapter) MTU() uint64 {
 
 // DefaultName gets the default TUN interface name for your platform.
 func DefaultName() string {
-	return defaults.GetDefaults().DefaultIfName
+	return config.GetDefaults().DefaultIfName
 }
 
 // DefaultMTU gets the default TUN interface MTU for your platform. This can
 // be as high as MaximumMTU(), depending on platform, but is never lower than 1280.
 func DefaultMTU() uint64 {
-	return defaults.GetDefaults().DefaultIfMTU
+	return config.GetDefaults().DefaultIfMTU
 }
 
 // MaximumMTU returns the maximum supported TUN interface MTU for your
 // platform. This can be as high as 65535, depending on platform, but is never
 // lower than 1280.
 func MaximumMTU() uint64 {
-	return defaults.GetDefaults().MaximumIfMTU
+	return config.GetDefaults().MaximumIfMTU
 }
 
 // Init initialises the TUN module. You must have acquired a Listener from
 // the Yggdrasil 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(rwc ReadWriteCloser, log core.Logger, opts ...SetupOption) (*TunAdapter, error) {
 	tun := &TunAdapter{
 		rwc: rwc,
 		log: log,
@@ -107,10 +117,15 @@ func (tun *TunAdapter) _start() error {
 	}
 	tun.addr = tun.rwc.Address()
 	tun.subnet = tun.rwc.Subnet()
-	addr := fmt.Sprintf("%s/%d", net.IP(tun.addr[:]).String(), 8*len(address.GetPrefix())-1)
+	prefix := address.GetPrefix()
+	var addr string
+	if tun.addr.IsValid() {
+		addr = fmt.Sprintf("%s/%d", net.IP(tun.addr[:]).String(), 8*len(prefix[:])-1)
+	}
 	if tun.config.name == "none" || tun.config.name == "dummy" {
 		tun.log.Debugln("Not starting TUN as ifname is none or dummy")
 		tun.isEnabled = false
+		go tun.queue()
 		go tun.write()
 		return nil
 	}
@@ -118,7 +133,13 @@ func (tun *TunAdapter) _start() error {
 	if tun.rwc.MaxMTU() < mtu {
 		mtu = tun.rwc.MaxMTU()
 	}
-	if err := tun.setup(string(tun.config.name), addr, mtu); err != nil {
+	var err error
+	if tun.config.fd > 0 {
+		err = tun.setupFD(tun.config.fd, addr, mtu)
+	} else {
+		err = tun.setup(string(tun.config.name), addr, mtu)
+	}
+	if err != nil {
 		return err
 	}
 	if tun.MTU() != mtu {
@@ -127,6 +148,8 @@ func (tun *TunAdapter) _start() error {
 	tun.rwc.SetMTU(tun.MTU())
 	tun.isOpen = true
 	tun.isEnabled = true
+	tun.ch = make(chan []byte, tun.iface.BatchSize())
+	go tun.queue()
 	go tun.read()
 	go tun.write()
 	return nil
@@ -160,3 +183,12 @@ func (tun *TunAdapter) _stop() error {
 	}
 	return nil
 }
+
+const bufPoolSize = TUN_OFFSET_BYTES + 65535
+
+var bufPool = sync.Pool{
+	New: func() any {
+		b := [bufPoolSize]byte{}
+		return b[:]
+	},
+}

src/tun/tun_darwin.go

@@ -1,5 +1,5 @@
-//go:build !mobile
+//go:build darwin || ios
-// +build !mobile
+// +build darwin ios
 
 package tun
 
@@ -7,6 +7,8 @@ package tun
 
 import (
 	"encoding/binary"
+	"fmt"
+	"os"
 	"strconv"
 	"strings"
 	"unsafe"
@@ -23,7 +25,7 @@ func (tun *TunAdapter) setup(ifname string, addr string, mtu uint64) error {
 	}
 	iface, err := wgtun.CreateTUN(ifname, int(mtu))
 	if err != nil {
-		panic(err)
+		return fmt.Errorf("failed to create TUN: %w", err)
 	}
 	tun.iface = iface
 	if m, err := iface.MTU(); err == nil {
@@ -31,7 +33,35 @@ func (tun *TunAdapter) setup(ifname string, addr string, mtu uint64) error {
 	} else {
 		tun.mtu = 0
 	}
-	return tun.setupAddress(addr)
+	if addr != "" {
+		return tun.setupAddress(addr)
+	}
+	return nil
+}
+
+// Configures the "utun" adapter from an existing file descriptor.
+func (tun *TunAdapter) setupFD(fd int32, addr string, mtu uint64) error {
+	dfd, err := unix.Dup(int(fd))
+	if err != nil {
+		return fmt.Errorf("failed to duplicate FD: %w", err)
+	}
+	err = unix.SetNonblock(dfd, true)
+	if err != nil {
+		unix.Close(dfd)
+		return fmt.Errorf("failed to set FD as non-blocking: %w", err)
+	}
+	iface, err := wgtun.CreateTUNFromFile(os.NewFile(uintptr(dfd), "/dev/tun"), 0)
+	if err != nil {
+		unix.Close(dfd)
+		return fmt.Errorf("failed to create TUN from FD: %w", err)
+	}
+	tun.iface = iface
+	if m, err := iface.MTU(); err == nil {
+		tun.mtu = getSupportedMTU(uint64(m))
+	} else {
+		tun.mtu = 0
+	}
+	return nil // tun.setupAddress(addr)
 }
 
 const (
@@ -81,8 +111,8 @@ func (tun *TunAdapter) setupAddress(addr string) error {
 	var err error
 
 	if fd, err = unix.Socket(unix.AF_INET6, unix.SOCK_DGRAM, 0); err != nil {
-		tun.log.Printf("Create AF_SYSTEM socket failed: %v.", err)
+		tun.log.Errorf("Create AF_SYSTEM socket failed: %v.", err)
-		return err
+		return fmt.Errorf("failed to open AF_SYSTEM: %w", err)
 	}
 
 	var ar in6_aliasreq
@@ -117,16 +147,16 @@ func (tun *TunAdapter) setupAddress(addr string) error {
 	tun.log.Infof("Interface IPv6: %s", addr)
 	tun.log.Infof("Interface MTU: %d", ir.ifru_mtu)
 
-	if _, _, errno := unix.Syscall(unix.SYS_IOCTL, uintptr(fd), uintptr(darwin_SIOCAIFADDR_IN6), uintptr(unsafe.Pointer(&ar))); errno != 0 {
+	if _, _, errno := unix.Syscall(unix.SYS_IOCTL, uintptr(fd), uintptr(darwin_SIOCAIFADDR_IN6), uintptr(unsafe.Pointer(&ar))); errno != 0 { // nolint:staticcheck
 		err = errno
 		tun.log.Errorf("Error in darwin_SIOCAIFADDR_IN6: %v", errno)
-		return err
+		return fmt.Errorf("failed to call SIOCAIFADDR_IN6: %w", err)
 	}
 
-	if _, _, errno := unix.Syscall(unix.SYS_IOCTL, uintptr(fd), uintptr(unix.SIOCSIFMTU), uintptr(unsafe.Pointer(&ir))); errno != 0 {
+	if _, _, errno := unix.Syscall(unix.SYS_IOCTL, uintptr(fd), uintptr(unix.SIOCSIFMTU), uintptr(unsafe.Pointer(&ir))); errno != 0 { // nolint:staticcheck
 		err = errno
 		tun.log.Errorf("Error in SIOCSIFMTU: %v", errno)
-		return err
+		return fmt.Errorf("failed to call SIOCSIFMTU: %w", err)
 	}
 
 	return err

src/tun/tun_freebsd.go

@@ -1,10 +1,11 @@
-//go:build openbsd || freebsd
+//go:build freebsd
-// +build openbsd freebsd
+// +build freebsd
 
 package tun
 
 import (
 	"encoding/binary"
+	"fmt"
 	"os/exec"
 	"strconv"
 	"strings"
@@ -53,11 +54,6 @@ struct  in6_ifreq {
  290 };
 */
 
-type in6_ifreq_mtu struct {
-	ifr_name [syscall.IFNAMSIZ]byte
-	ifru_mtu int
-}
-
 type in6_ifreq_addr struct {
 	ifr_name  [syscall.IFNAMSIZ]byte
 	ifru_addr sockaddr_in6
@@ -77,7 +73,7 @@ type in6_ifreq_lifetime struct {
 func (tun *TunAdapter) setup(ifname string, addr string, mtu uint64) error {
 	iface, err := wgtun.CreateTUN(ifname, int(mtu))
 	if err != nil {
-		panic(err)
+		return fmt.Errorf("failed to create TUN: %w", err)
 	}
 	tun.iface = iface
 	if mtu, err := iface.MTU(); err == nil {
@@ -85,7 +81,15 @@ func (tun *TunAdapter) setup(ifname string, addr string, mtu uint64) error {
 	} else {
 		tun.mtu = 0
 	}
-	return tun.setupAddress(addr)
+	if addr != "" {
+		return tun.setupAddress(addr)
+	}
+	return nil
+}
+
+// Configures the "utun" adapter from an existing file descriptor.
+func (tun *TunAdapter) setupFD(fd int32, addr string, mtu uint64) error {
+	return fmt.Errorf("setup via FD not supported on this platform")
 }
 
 func (tun *TunAdapter) setupAddress(addr string) error {
@@ -103,26 +107,6 @@ func (tun *TunAdapter) setupAddress(addr string) error {
 	tun.log.Infof("Interface IPv6: %s", addr)
 	tun.log.Infof("Interface MTU: %d", tun.mtu)
 
-	// Create the MTU request
-	var ir in6_ifreq_mtu
-	copy(ir.ifr_name[:], tun.Name())
-	ir.ifru_mtu = int(tun.mtu)
-
-	// Set the MTU
-	if _, _, errno := unix.Syscall(unix.SYS_IOCTL, uintptr(sfd), uintptr(syscall.SIOCSIFMTU), uintptr(unsafe.Pointer(&ir))); errno != 0 {
-		err = errno
-		tun.log.Errorf("Error in SIOCSIFMTU: %v", errno)
-
-		// Fall back to ifconfig to set the MTU
-		cmd := exec.Command("ifconfig", tun.Name(), "mtu", string(tun.mtu))
-		tun.log.Warnf("Using ifconfig as fallback: %v", strings.Join(cmd.Args, " "))
-		output, err := cmd.CombinedOutput()
-		if err != nil {
-			tun.log.Errorf("SIOCSIFMTU fallback failed: %v.", err)
-			tun.log.Traceln(string(output))
-		}
-	}
-
 	// Create the address request
 	// FIXME: I don't work!
 	var ar in6_ifreq_addr

src/tun/tun_linux.go

@@ -1,11 +1,13 @@
-//go:build !mobile
+//go:build linux || android
-// +build !mobile
+// +build linux android
 
 package tun
 
 // The linux platform specific tun parts
 
 import (
+	"fmt"
+
 	"github.com/vishvananda/netlink"
 	wgtun "golang.zx2c4.com/wireguard/tun"
 )
@@ -17,7 +19,7 @@ func (tun *TunAdapter) setup(ifname string, addr string, mtu uint64) error {
 	}
 	iface, err := wgtun.CreateTUN(ifname, int(mtu))
 	if err != nil {
-		panic(err)
+		return fmt.Errorf("failed to create TUN: %w", err)
 	}
 	tun.iface = iface
 	if mtu, err := iface.MTU(); err == nil {
@@ -25,7 +27,15 @@ func (tun *TunAdapter) setup(ifname string, addr string, mtu uint64) error {
 	} else {
 		tun.mtu = 0
 	}
-	return tun.setupAddress(addr)
+	if addr != "" {
+		return tun.setupAddress(addr)
+	}
+	return nil
+}
+
+// Configures the "utun" adapter from an existing file descriptor.
+func (tun *TunAdapter) setupFD(fd int32, addr string, mtu uint64) error {
+	return fmt.Errorf("setup via FD not supported on this platform")
 }
 
 // Configures the TUN adapter with the correct IPv6 address and MTU. Netlink
@@ -35,20 +45,20 @@ func (tun *TunAdapter) setup(ifname string, addr string, mtu uint64) error {
 func (tun *TunAdapter) setupAddress(addr string) error {
 	nladdr, err := netlink.ParseAddr(addr)
 	if err != nil {
-		return err
+		return fmt.Errorf("couldn't parse address %q: %w", addr, err)
 	}
 	nlintf, err := netlink.LinkByName(tun.Name())
 	if err != nil {
-		return err
+		return fmt.Errorf("failed to find link by name: %w", err)
 	}
 	if err := netlink.AddrAdd(nlintf, nladdr); err != nil {
-		return err
+		return fmt.Errorf("failed to add address to link: %w", err)
 	}
 	if err := netlink.LinkSetMTU(nlintf, int(tun.mtu)); err != nil {
-		return err
+		return fmt.Errorf("failed to set link MTU: %w", err)
 	}
 	if err := netlink.LinkSetUp(nlintf); err != nil {
-		return err
+		return fmt.Errorf("failed to bring link up: %w", err)
 	}
 	// Friendly output
 	tun.log.Infof("Interface name: %s", tun.Name())

src/tun/tun_openbsd.go

@@ -0,0 +1,122 @@
+//go:build openbsd
+// +build openbsd
+
+package tun
+
+import (
+	"fmt"
+	"net"
+	"syscall"
+	"unsafe"
+
+	"golang.org/x/sys/unix"
+
+	wgtun "golang.zx2c4.com/wireguard/tun"
+)
+
+const (
+	SIOCAIFADDR_IN6       = 0x8080691a
+	ND6_INFINITE_LIFETIME = 0xffffffff
+)
+
+type in6_addrlifetime struct {
+	ia6t_expire    int64
+	ia6t_preferred int64
+	ia6t_vltime    uint32
+	ia6t_pltime    uint32
+}
+
+// Match types from the net package, effectively being [16]byte for IPv6 addresses.
+type in6_addr [16]uint8
+
+type sockaddr_in6 struct {
+	sin6_len      uint8
+	sin6_family   uint8
+	sin6_port     uint16
+	sin6_flowinfo uint32
+	sin6_addr     in6_addr
+	sin6_scope_id uint32
+}
+
+func (sa6 *sockaddr_in6) setSockaddr(addr [/*16*/]byte /* net.IP or net.IPMask */) {
+	sa6.sin6_len    = uint8(unsafe.Sizeof(*sa6))
+	sa6.sin6_family = unix.AF_INET6
+
+	for i := range sa6.sin6_addr {
+		sa6.sin6_addr[i] = addr[i]
+	}
+}
+
+type in6_aliasreq struct {
+	ifra_name       [syscall.IFNAMSIZ]byte
+	ifra_addr       sockaddr_in6
+	ifra_dstaddr    sockaddr_in6
+	ifra_prefixmask sockaddr_in6
+	ifra_flags      int32
+	ifra_lifetime   in6_addrlifetime
+}
+
+// Configures the TUN adapter with the correct IPv6 address and MTU.
+func (tun *TunAdapter) setup(ifname string, addr string, mtu uint64) error {
+	iface, err := wgtun.CreateTUN(ifname, int(mtu))
+	if err != nil {
+		return fmt.Errorf("failed to create TUN: %w", err)
+	}
+	tun.iface = iface
+	if mtu, err := iface.MTU(); err == nil {
+		tun.mtu = getSupportedMTU(uint64(mtu))
+	} else {
+		tun.mtu = 0
+	}
+	if addr != "" {
+		return tun.setupAddress(addr)
+	}
+	return nil
+}
+
+// Configures the "utun" adapter from an existing file descriptor.
+func (tun *TunAdapter) setupFD(fd int32, addr string, mtu uint64) error {
+	return fmt.Errorf("setup via FD not supported on this platform")
+}
+
+func (tun *TunAdapter) setupAddress(addr string) error {
+	var sfd int
+	var err error
+
+	ip, prefix, err := net.ParseCIDR(addr)
+	if err != nil {
+		tun.log.Errorf("Error in ParseCIDR: %v", err)
+		return err
+	}
+
+	// Create system socket
+	if sfd, err = unix.Socket(unix.AF_INET6, unix.SOCK_DGRAM, 0); err != nil {
+		tun.log.Printf("Create AF_INET6 socket failed: %v", err)
+		return err
+	}
+
+	// Friendly output
+	tun.log.Infof("Interface name: %s", tun.Name())
+	tun.log.Infof("Interface IPv6: %s", addr)
+	tun.log.Infof("Interface MTU: %d", tun.mtu)
+
+	// Create the address request
+	var ar in6_aliasreq
+	copy(ar.ifra_name[:], tun.Name())
+
+	ar.ifra_addr.setSockaddr(ip)
+
+	prefixmask := net.CIDRMask(prefix.Mask.Size())
+	ar.ifra_prefixmask.setSockaddr(prefixmask)
+
+	ar.ifra_lifetime.ia6t_vltime = ND6_INFINITE_LIFETIME
+	ar.ifra_lifetime.ia6t_pltime = ND6_INFINITE_LIFETIME
+
+	// Set the interface address
+	if err = unix.IoctlSetInt(sfd, SIOCAIFADDR_IN6, int(uintptr(unsafe.Pointer(&ar)))); err != nil {
+		tun.log.Errorf("Error in SIOCAIFADDR_IN6: %v", err)
+		return err
+	}
+
+	return nil
+}

src/tun/tun_other.go

@@ -1,5 +1,5 @@
-//go:build !linux && !darwin && !windows && !openbsd && !freebsd && !mobile
+//go:build !linux && !darwin && !ios && !android && !windows && !openbsd && !freebsd && !mobile
-// +build !linux,!darwin,!windows,!openbsd,!freebsd,!mobile
+// +build !linux,!darwin,!ios,!android,!windows,!openbsd,!freebsd,!mobile
 
 package tun
 
@@ -7,6 +7,8 @@ package tun
 // If your platform supports tun devices, you could try configuring it manually
 
 import (
+	"fmt"
+
 	wgtun "golang.zx2c4.com/wireguard/tun"
 )
 
@@ -14,7 +16,7 @@ import (
 func (tun *TunAdapter) setup(ifname string, addr string, mtu uint64) error {
 	iface, err := wgtun.CreateTUN(ifname, mtu)
 	if err != nil {
-		panic(err)
+		return fmt.Errorf("failed to create TUN: %w", err)
 	}
 	tun.iface = iface
 	if mtu, err := iface.MTU(); err == nil {
@@ -22,7 +24,15 @@ func (tun *TunAdapter) setup(ifname string, addr string, mtu uint64) error {
 	} else {
 		tun.mtu = 0
 	}
-	return tun.setupAddress(addr)
+	if addr != "" {
+		return tun.setupAddress(addr)
+	}
+	return nil
+}
+
+// Configures the "utun" adapter from an existing file descriptor.
+func (tun *TunAdapter) setupFD(fd int32, addr string, mtu uint64) error {
+	return fmt.Errorf("setup via FD not supported on this platform")
 }
 
 // We don't know how to set the IPv6 address on an unknown platform, therefore

src/tun/tun_windows.go

@@ -4,14 +4,16 @@
 package tun
 
 import (
-	"bytes"
 	"errors"
+	"fmt"
 	"log"
-	"net"
+	"net/netip"
+	"time"
 
-	"github.com/yggdrasil-network/yggdrasil-go/src/defaults"
+	"github.com/yggdrasil-network/yggdrasil-go/src/config"
 	"golang.org/x/sys/windows"
 
+	"golang.zx2c4.com/wintun"
 	wgtun "golang.zx2c4.com/wireguard/tun"
 	"golang.zx2c4.com/wireguard/windows/elevate"
 	"golang.zx2c4.com/wireguard/windows/tunnel/winipcfg"
@@ -22,7 +24,7 @@ import (
 // Configures the TUN adapter with the correct IPv6 address and MTU.
 func (tun *TunAdapter) setup(ifname string, addr string, mtu uint64) error {
 	if ifname == "auto" {
-		ifname = defaults.GetDefaults().DefaultIfName
+		ifname = config.GetDefaults().DefaultIfName
 	}
 	return elevate.DoAsSystem(func() error {
 		var err error
@@ -31,13 +33,27 @@ func (tun *TunAdapter) setup(ifname string, addr string, mtu uint64) error {
 		if guid, err = windows.GUIDFromString("{8f59971a-7872-4aa6-b2eb-061fc4e9d0a7}"); err != nil {
 			return err
 		}
-		if iface, err = wgtun.CreateTUNWithRequestedGUID(ifname, &guid, int(mtu)); err != nil {
+		iface, err = wgtun.CreateTUNWithRequestedGUID(ifname, &guid, int(mtu))
-			return err
+		if err != nil {
+			// Very rare condition, it will purge the old device and create new
+			tun.log.Printf("Error creating TUN: '%s'", err)
+			wintun.Uninstall()
+			time.Sleep(3 * time.Second)
+			tun.log.Printf("Trying again")
+			iface, err = wgtun.CreateTUNWithRequestedGUID(ifname, &guid, int(mtu))
+			if err != nil {
+				return err
+			}
 		}
+		tun.log.Printf("Waiting for TUN to come up")
+		time.Sleep(1 * time.Second)
 		tun.iface = iface
-		if err = tun.setupAddress(addr); err != nil {
+		if addr != "" {
-			tun.log.Errorln("Failed to set up TUN address:", err)
+			tun.log.Printf("Setting up address")
-			return err
+			if err = tun.setupAddress(addr); err != nil {
+				tun.log.Errorln("Failed to set up TUN address:", err)
+				return err
+			}
 		}
 		if err = tun.setupMTU(getSupportedMTU(mtu)); err != nil {
 			tun.log.Errorln("Failed to set up TUN MTU:", err)
@@ -46,10 +62,16 @@ func (tun *TunAdapter) setup(ifname string, addr string, mtu uint64) error {
 		if mtu, err := iface.MTU(); err == nil {
 			tun.mtu = uint64(mtu)
 		}
+		tun.log.Printf("TUN is set up successfully")
 		return nil
 	})
 }
 
+// Configures the "utun" adapter from an existing file descriptor.
+func (tun *TunAdapter) setupFD(fd int32, addr string, mtu uint64) error {
+	return fmt.Errorf("setup via FD not supported on this platform")
+}
+
 // Sets the MTU of the TUN adapter.
 func (tun *TunAdapter) setupMTU(mtu uint64) error {
 	if tun.iface == nil || tun.Name() == "" {
@@ -83,13 +105,9 @@ func (tun *TunAdapter) setupAddress(addr string) error {
 		return errors.New("Can't configure IPv6 address as TUN adapter is not present")
 	}
 	if intf, ok := tun.iface.(*wgtun.NativeTun); ok {
-		if ipaddr, ipnet, err := net.ParseCIDR(addr); err == nil {
+		if ipnet, err := netip.ParsePrefix(addr); err == nil {
 			luid := winipcfg.LUID(intf.LUID())
-			addresses := append([]net.IPNet{}, net.IPNet{
+			addresses := []netip.Prefix{ipnet}
-				IP:   ipaddr,
-				Mask: ipnet.Mask,
-			})
-
 			err := luid.SetIPAddressesForFamily(windows.AF_INET6, addresses)
 			if err == windows.ERROR_OBJECT_ALREADY_EXISTS {
 				cleanupAddressesOnDisconnectedInterfaces(windows.AF_INET6, addresses)
@@ -112,24 +130,13 @@ func (tun *TunAdapter) setupAddress(addr string) error {
  * SPDX-License-Identifier: MIT
  * Copyright (C) 2019 WireGuard LLC. All Rights Reserved.
  */
-func cleanupAddressesOnDisconnectedInterfaces(family winipcfg.AddressFamily, addresses []net.IPNet) {
+func cleanupAddressesOnDisconnectedInterfaces(family winipcfg.AddressFamily, addresses []netip.Prefix) {
 	if len(addresses) == 0 {
 		return
 	}
-	includedInAddresses := func(a net.IPNet) bool {
+	addrHash := make(map[netip.Addr]bool, len(addresses))
-		// TODO: this makes the whole algorithm O(n^2). But we can't stick net.IPNet in a Go hashmap. Bummer!
+	for i := range addresses {
-		for _, addr := range addresses {
+		addrHash[addresses[i].Addr()] = true
-			ip := addr.IP
-			if ip4 := ip.To4(); ip4 != nil {
-				ip = ip4
-			}
-			mA, _ := addr.Mask.Size()
-			mB, _ := a.Mask.Size()
-			if bytes.Equal(ip, a.IP) && mA == mB {
-				return true
-			}
-		}
-		return false
 	}
 	interfaces, err := winipcfg.GetAdaptersAddresses(family, winipcfg.GAAFlagDefault)
 	if err != nil {
@@ -140,11 +147,10 @@ func cleanupAddressesOnDisconnectedInterfaces(family winipcfg.AddressFamily, add
 			continue
 		}
 		for address := iface.FirstUnicastAddress; address != nil; address = address.Next {
-			ip := address.Address.IP()
+			if ip, _ := netip.AddrFromSlice(address.Address.IP()); addrHash[ip] {
-			ipnet := net.IPNet{IP: ip, Mask: net.CIDRMask(int(address.OnLinkPrefixLength), 8*len(ip))}
+				prefix := netip.PrefixFrom(ip, int(address.OnLinkPrefixLength))
-			if includedInAddresses(ipnet) {
+				log.Printf("Cleaning up stale address %s from interface ‘%s’", prefix.String(), iface.FriendlyName())
-				log.Printf("Cleaning up stale address %s from interface ‘%s’", ipnet.String(), iface.FriendlyName())
+				iface.LUID.DeleteIPAddress(prefix)
-				iface.LUID.DeleteIPAddress(ipnet)
 			}
 		}
 	}