dynamically linked libraries support

Added compilation of dynamically linked libraries

build

@@ -28,11 +28,24 @@ if [ -z $TABLES ] && [ -z $DEBUG ]; then
   LDFLAGS="$LDFLAGS -s -w"
 fi
 
-for CMD in yggdrasil yggdrasilctl ; do
+LIBNAME="yggdrasillib"
+
+if [[ "$OSTYPE" == "linux-gnu"* ]]; then
+  LIBNAME="$LIBNAME.so"
+elif [[ "$OSTYPE" == "darwin"* ]]; then
+  LIBNAME="$LIBNAME.dylib"
+elif [[ "$OSTYPE" == "win32" ]]; then
+  LIBNAME="$LIBNAME.dll"
+fi
+
+for CMD in yggdrasil yggdrasilctl; do
   echo "Building: $CMD"
+
   go build $ARGS -ldflags="$LDFLAGS" -gcflags="$GCFLAGS" ./cmd/$CMD
 
   if [ $UPX ]; then
     upx --brute $CMD
   fi
 done
+
+go build -ldflags="$LDFLAGS" -buildmode=c-shared -o="$LIBNAME" ./cmd/yggdrasillib

cmd/yggdrasillib/main.go

@@ -0,0 +1,393 @@
+package main
+
+import "C"
+import (
+	"context"
+	"encoding/hex"
+	"fmt"
+	"net"
+	"os"
+	"os/signal"
+	"regexp"
+	"strings"
+	"syscall"
+
+	"crypto/ed25519"
+	"encoding/json"
+
+	"github.com/gologme/log"
+	gsyslog "github.com/hashicorp/go-syslog"
+	"github.com/hjson/hjson-go/v4"
+	"github.com/kardianos/minwinsvc"
+	"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/core"
+	"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"
+)
+
+type node struct {
+	core      *core.Core
+	tun       *tun.TunAdapter
+	multicast *multicast.Multicast
+	admin     *admin.AdminSocket
+}
+
+var logger *log.Logger
+var cfg *config.NodeConfig
+var loglevel = false
+
+// Catch interrupts from the operating system to exit gracefully.
+var ctx, cancel = signal.NotifyContext(context.Background(), os.Interrupt, syscall.SIGTERM)
+
+func setLogLevel(loglevel string, logger *log.Logger) {
+	levels := [...]string{"error", "warn", "info", "debug", "trace"}
+	loglevel = strings.ToLower(loglevel)
+
+	contains := func() bool {
+		for _, l := range levels {
+			if l == loglevel {
+				return true
+			}
+		}
+		return false
+	}
+
+	if !contains() { // set default log level
+		logger.Infoln("Loglevel parse failed. Set default level(info)")
+		loglevel = "info"
+	}
+
+	for _, l := range levels {
+		logger.EnableLevel(l)
+		if l == loglevel {
+			break
+		}
+	}
+}
+
+func main() {
+}
+
+//export Start
+func Start(useconffilec *C.char) (int, *C.char) {
+	useconffile := C.GoString(useconffilec)
+	code, message := run(useconffile, ctx)
+	return code, C.CString(string(message))
+}
+
+func run(useconffile string, ctx context.Context) (int, string) {
+	minwinsvc.SetOnExit(cancel)
+
+	if logger == nil {
+		logger = log.New(os.Stdout, "", log.Flags())
+		logger.Warnln("Logging defaulting to stdout")
+	}
+
+	if !loglevel {
+		setLogLevel("error", logger)
+	}
+
+	cfg = config.GenerateConfig()
+	var err error
+
+	if useconffile != "" {
+		f, err := os.Open(useconffile)
+		if err != nil {
+			return 1, err.Error()
+		}
+		if _, err := cfg.ReadFrom(f); err != nil {
+			return 1, err.Error()
+		}
+		_ = f.Close()
+		fmt.Printf("Config file %s loaded successfully\n", f.Name())
+	}
+	n := &node{}
+
+	// Set up the Yggdrasil node itself.
+	{
+		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 {
+				return 1, err.Error()
+			}
+			options = append(options, core.AllowedPublicKey(k[:]))
+		}
+		if n.core, err = core.New(cfg.Certificate, logger, options...); err != nil {
+			return 1, err.Error()
+		}
+		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())
+	}
+
+	// Setup 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 {
+			return 1, err.Error()
+		}
+		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 {
+			return 1, err.Error()
+		}
+		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 {
+			return 1, err.Error()
+		}
+		if n.admin != nil && n.tun != nil {
+			n.tun.SetupAdminHandlers(n.admin)
+		}
+	}
+
+	// Block until we are told to shut down.
+	<-ctx.Done()
+
+	// Shut down the node.
+	//_ = w.Stop()
+	_ = n.admin.Stop()
+	_ = n.multicast.Stop()
+	_ = n.tun.Stop()
+	n.core.Stop()
+	return 0, "Exit gracefully"
+}
+
+//export Exit
+func Exit() int {
+	cancel()
+	return 1
+}
+
+//export GetBuildName
+func GetBuildName() *C.char {
+	result := version.BuildName()
+	return C.CString(result)
+}
+
+//export GetVersion
+func GetVersion() *C.char {
+	result := version.BuildVersion()
+	return C.CString(result)
+}
+
+//export GetAddress
+func GetAddress(cpath *C.char) (int, *C.char) {
+	cfg = config.GenerateConfig()
+	path := C.GoString(cpath)
+	err := ReadConfigFile(path)
+	if err != nil {
+		return 1, C.CString(err.Error())
+	}
+	privateKey := ed25519.PrivateKey(cfg.PrivateKey)
+	publicKey := privateKey.Public().(ed25519.PublicKey)
+	result := Address(publicKey)
+	return 0, C.CString(result)
+}
+
+//export GetSnet
+func GetSnet(cpath *C.char) (int, *C.char) {
+	cfg = config.GenerateConfig()
+	path := C.GoString(cpath)
+	err := ReadConfigFile(path)
+	if err != nil {
+		return 1, C.CString(err.Error())
+	}
+	privateKey := ed25519.PrivateKey(cfg.PrivateKey)
+	publicKey := privateKey.Public().(ed25519.PublicKey)
+	result := Snet(publicKey)
+	return 0, C.CString(result)
+}
+
+//export GetPkey
+func GetPkey(cpath *C.char) (int, *C.char) {
+	cfg = config.GenerateConfig()
+	path := C.GoString(cpath)
+	err := ReadConfigFile(path)
+	if err != nil {
+		return 1, C.CString(err.Error())
+	}
+	privateKey := ed25519.PrivateKey(cfg.PrivateKey)
+	publicKey := privateKey.Public().(ed25519.PublicKey)
+	result := hex.EncodeToString(publicKey)
+	return 0, C.CString(result)
+}
+
+//export GetPemKey
+func GetPemKey(cpath *C.char) (int, *C.char) {
+	cfg = config.GenerateConfig()
+	path := C.GoString(cpath)
+	err := ReadConfigFile(path)
+	if err != nil {
+		return 1, C.CString(err.Error())
+	}
+	val, result := Exportkey(cfg)
+	return val, C.CString(result)
+}
+
+//export GenConfigFile
+func GenConfigFile(confjson int) (int, *C.char) {
+	cfg = config.GenerateConfig()
+	var err error
+	cfg.AdminListen = ""
+	var bs []byte
+	if confjson == 1 {
+		bs, err = json.MarshalIndent(cfg, "", "  ")
+	} else {
+		bs, err = hjson.Marshal(cfg)
+	}
+	if err != nil {
+		return 1, C.CString(err.Error())
+	}
+	f, err := os.Create("yggdrasil.conf")
+	if err != nil {
+		return 1, C.CString(err.Error())
+	}
+	defer f.Close()
+	_, err = f.WriteString(string(bs))
+	if err != nil {
+		return 1, C.CString(err.Error())
+	}
+	fmt.Printf("Config file %s created successfully\n", f.Name())
+	return 0, C.CString(string(bs))
+}
+
+//export NormaliseConfing
+func NormaliseConfing(cpath *C.char, confjson int) (int, *C.char) {
+	cfg = config.GenerateConfig()
+	path := C.GoString(cpath)
+	err := ReadConfigFile(path)
+	if err != nil {
+		return 1, C.CString(err.Error())
+	}
+	cfg.AdminListen = ""
+	if cfg.PrivateKeyPath != "" {
+		cfg.PrivateKey = nil
+	}
+	var bs []byte
+	if confjson == 1 {
+		bs, err = json.MarshalIndent(cfg, "", "  ")
+	} else {
+		bs, err = hjson.Marshal(cfg)
+	}
+	if err != nil {
+		return 1, C.CString(err.Error())
+	}
+	return 0, C.CString(string(bs))
+}
+
+//export Logto
+func Logto(argsc *C.char) {
+	args := C.GoString(argsc)
+	switch args {
+	case "stdout":
+		fmt.Println("stdout is set")
+		logger = log.New(os.Stdout, "", log.Flags())
+	case "syslog":
+		fmt.Println("syslog is set")
+		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, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644); err == nil {
+			logger = log.New(logfd, "", log.Flags())
+		}
+		fmt.Printf("Path %s is set\n", args)
+	}
+}
+
+//export SetLogLevel
+func SetLogLevel(argsc *C.char) (int, *C.char) {
+	if logger == nil {
+		return 1, C.CString("Logger is not created")
+	}
+	args := C.GoString(argsc)
+	setLogLevel(args, logger)
+	loglevel = true
+	return 0, C.CString("Loglevel has been set")
+}
+
+func Snet(publicKey ed25519.PublicKey) string {
+	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),
+	}
+	return ipnet.String()
+}
+
+func Address(publicKey ed25519.PublicKey) string {
+	addr := address.AddrForKey(publicKey)
+	ip := net.IP(addr[:])
+	return ip.String()
+}
+
+func Exportkey(cfg *config.NodeConfig) (int, string) {
+	pem, err := cfg.MarshalPEMPrivateKey()
+	if err != nil {
+		return 1, err.Error()
+	}
+	return 0, string(pem)
+}
+
+func ReadConfigFile(filepath string) error {
+	f, err := os.Open(filepath)
+	if err != nil {
+		return err
+	}
+	if _, err := cfg.ReadFrom(f); err != nil {
+		return err
+	}
+	_ = f.Close()
+	return nil
+}