various minor cleanups and improvements to error handling

Signed-off-by: Steffen Vogel <post@steffenvogel.de>

cmd/wice/daemon.go

@@ -62,6 +62,7 @@ func daemon(cmd *cobra.Command, args []string) {
 	}
 
 	if logger.Core().Enabled(zap.DebugLevel) {
+		logger.Debug("Loaded configuration:")
 		cfg.Dump(&zapio.Writer{Log: logger})
 	}
 

cmd/wice/docs.go

@@ -69,7 +69,7 @@ func docsManpage(cmd *cobra.Command, args []string) error {
 
 	d, err := time.Parse(time.RFC3339, date)
 	if err != nil {
-		return fmt.Errorf("failed to parse build date")
+		d = time.Now()
 	}
 
 	header := &doc.GenManHeader{

internal/util/util.go

@@ -34,10 +34,6 @@ func CmpNet(a, b *net.IPNet) int {
 	return bytes.Compare(a.IP, b.IP)
 }
 
-// func lessNets(nets []net.IPNet) Less {
-// 	return func(i, j int) bool { return cmpNet(&nets[i], &nets[j]) < 0 }
-// }
-
 // GenerateRandomBytes returns securely generated random bytes.
 // It will return an error if the system's secure random
 // number generator fails to function correctly, in which

pkg/intf/base.go

@@ -64,7 +64,7 @@ func (i *BaseInterface) Close() error {
 
 	for _, p := range i.peers {
 		if err := p.Close(); err != nil {
-			return err
+			return fmt.Errorf("failed to close peer: %w", err)
 		}
 	}
 

pkg/netlink/netlink_test.go

@@ -32,6 +32,6 @@ func TestWireguardLink(t *testing.T) {
 	}
 
 	if err := netlink.LinkDel(l); err != nil {
-		t.Errorf("failed to delete Wireguard device: %w", err)
+		t.Errorf("failed to delete Wireguard device: %s", err)
 	}
 }

pkg/socket/client.go

@@ -55,7 +55,7 @@ func waitForSocket(path string) error {
 
 func Connect(path string) (*Client, error) {
 	if err := waitForSocket(path); err != nil {
-		return nil, fmt.Errorf("failed to wait for socket: %w", err)
+		return nil, fmt.Errorf("failed to wait for socket: %s: %w", path, err)
 	}
 
 	tgt := fmt.Sprintf("unix://%s", path)

test/e2e/agent.go

@@ -23,7 +23,7 @@ import (
 	"riasc.eu/wice/pkg/socket"
 )
 
-// Agent is a host running WICE
+// Agent is a host running ɯice
 type Agent struct {
 	*g.Host
 
@@ -120,7 +120,7 @@ func (a *Agent) Start(directArgs ...interface{}) error {
 		log.Fatal(err)
 	}
 
-	cmd, err := buildWICE(a.Network())
+	cmd, err := buildBinary(a.Network())
 	if err != nil {
 		return fmt.Errorf("failed to build wice: %w", err)
 	}

test/e2e/build.go

@@ -2,18 +2,23 @@ package e2e
 
 import (
 	"fmt"
+	"sync"
 
 	g "github.com/stv0g/gont/pkg"
 )
 
 var (
 	// Singleton for compiled wice executable
-	wiceBinary string
+	binary      string
+	binaryMutex sync.Mutex
 )
 
-func buildWICE(n *g.Network) (string, error) {
-	if wiceBinary != "" {
-		return wiceBinary, nil
+func buildBinary(n *g.Network) (string, error) {
+	binaryMutex.Lock()
+	defer binaryMutex.Unlock()
+
+	if binary != "" {
+		return binary, nil
 	}
 
 	wiceBinary := "/tmp/wice"

test/e2e/net/filtered.go

@@ -9,7 +9,7 @@ import (
 )
 
 func Filtered(p *NetworkParams) (*Network, error) {
-	// We are dropped packets between the WICE nodes to force ICE using the relay
+	// We are dropped packets between the ɯice nodes to force ICE using the relay
 	_, hostNetV4, err := net.ParseCIDR("10.0.1.0/24")
 	if err != nil {
 		return nil, err

test/e2e/run_test.go

@@ -46,7 +46,7 @@ func RunTest(t *testing.T, factory net.NetworkFactory, p *net.NetworkParams, arg
 
 	logger.Info("Starting agent nodes", zap.Int("count", len(n.Agents)))
 	if err := n.Agents.Start(args...); err != nil {
-		t.Fatalf("Failed to start WICE: %s", err)
+		t.Fatalf("Failed to start ɯice: %s", err)
 	}
 	defer n.Agents.Stop()
 

test/e2e/signaling_grpc.go

@@ -51,7 +51,7 @@ func (s *GrpcSignalingNode) Start(_ ...interface{}) error {
 		"--listen", fmt.Sprintf(":%d", s.port),
 	}
 
-	cmd, err := buildWICE(s.Network())
+	cmd, err := buildBinary(s.Network())
 	if err != nil {
 		return fmt.Errorf("failed to build wice: %w", err)
 	}