Fix RetryPeersNow, move startup logging, don't set TUN address if not available

cmd/yggdrasil/main.go

@@ -205,6 +205,10 @@ func main() {
 		if n.core, err = core.New(cfg.Certificate, logger, options...); err != nil {
 			panic(err)
 		}
+		address, subnet := n.core.Address(), n.core.Subnet()
+		logger.Infof("Your public key is %s", hex.EncodeToString(n.core.PublicKey()))
+		logger.Infof("Your IPv6 address is %s", address.String())
+		logger.Infof("Your IPv6 subnet is %s", subnet.String())
 	}
 
 	// Setup the admin socket.

contrib/mobile/mobile.go

@@ -78,6 +78,10 @@ func (m *Yggdrasil) StartJSON(configjson []byte) error {
 		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.

src/core/core.go

@@ -4,7 +4,6 @@ import (
 	"context"
 	"crypto/ed25519"
 	"crypto/tls"
-	"encoding/hex"
 	"fmt"
 	"io"
 	"net"
@@ -104,10 +103,6 @@ func New(cert *tls.Certificate, logger Logger, opts ...SetupOption) (*Core, erro
 	); err != nil {
 		return nil, fmt.Errorf("error creating encryption: %w", err)
 	}
-	address, subnet := c.Address(), c.Subnet()
-	c.log.Infof("Your public key is %s", hex.EncodeToString(c.public))
-	c.log.Infof("Your IPv6 address is %s", address.String())
-	c.log.Infof("Your IPv6 subnet is %s", subnet.String())
 	c.proto.init(c)
 	if err := c.links.init(c); err != nil {
 		return nil, fmt.Errorf("error initialising links: %w", err)
@@ -140,7 +135,14 @@ func New(cert *tls.Certificate, logger Logger, opts ...SetupOption) (*Core, erro
 }
 
 func (c *Core) RetryPeersNow() {
-	// TODO: figure out a way to retrigger peer connections.
+	phony.Block(&c.links, func() {
+		for _, l := range c.links._links {
+			select {
+			case l.kick <- struct{}{}:
+			default:
+			}
+		}
+	})
 }
 
 // Stop shuts down the Yggdrasil node.

src/tun/tun.go

@@ -116,7 +116,10 @@ func (tun *TunAdapter) _start() error {
 	tun.addr = tun.rwc.Address()
 	tun.subnet = tun.rwc.Subnet()
 	prefix := address.GetPrefix()
-	addr := fmt.Sprintf("%s/%d", net.IP(tun.addr[:]).String(), 8*len(prefix[:])-1)
+	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

src/tun/tun_bsd.go

@@ -86,8 +86,11 @@ func (tun *TunAdapter) setup(ifname string, addr string, mtu uint64) error {
 	} 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 {

src/tun/tun_darwin.go

@@ -32,8 +32,11 @@ func (tun *TunAdapter) setup(ifname string, addr string, mtu uint64) error {
 	} 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 {

src/tun/tun_linux.go

@@ -27,8 +27,11 @@ func (tun *TunAdapter) setup(ifname string, addr string, mtu uint64) error {
 	} 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 {

src/tun/tun_other.go

@@ -24,8 +24,11 @@ func (tun *TunAdapter) setup(ifname string, addr string, mtu uint64) error {
 	} 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 {

src/tun/tun_windows.go

@@ -35,10 +35,12 @@ func (tun *TunAdapter) setup(ifname string, addr string, mtu uint64) error {
 			return err
 		}
 		tun.iface = iface
+		if addr != "" {
 			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)
 			return err