Use multierr in packetimpact Connection.Close()

PiperOrigin-RevId: 306930652

WORKSPACE

@@ -400,6 +400,20 @@ go_repository(
     version = "v0.20.0",
 )
 
+go_repository(
+    name = "org_uber_go_atomic",
+    importpath = "go.uber.org/atomic",
+    version = "v1.6.0",
+    sum = "h1:Ezj3JGmsOnG1MoRWQkPBsKLe9DwWD9QeXzTRzzldNVk=",
+)
+
+go_repository(
+    name = "org_uber_go_multierr",
+    importpath = "go.uber.org/multierr",
+    version = "v1.5.0",
+    sum = "h1:KCa4XfM8CWFCpxXRGok+Q0SS/0XBhMDbHHGABQLvD2A=",
+)
+
 # BigQuery Dependencies for Benchmarks
 go_repository(
     name = "com_google_cloud_go",

test/packetimpact/testbench/BUILD

@@ -28,6 +28,7 @@ go_library(
         "@org_golang_google_grpc//:go_default_library",
         "@org_golang_google_grpc//keepalive:go_default_library",
         "@org_golang_x_sys//unix:go_default_library",
+        "@org_uber_go_multierr//:go_default_library",
     ],
 )
 

test/packetimpact/testbench/connections.go

@@ -26,6 +26,7 @@ import (
 	"time"
 
 	"github.com/mohae/deepcopy"
+	"go.uber.org/multierr"
 	"golang.org/x/sys/unix"
 	"gvisor.dev/gvisor/pkg/tcpip"
 	"gvisor.dev/gvisor/pkg/tcpip/header"
@@ -382,17 +383,15 @@ func (conn *Connection) match(override, received Layers) bool {
 
 // Close frees associated resources held by the Connection.
 func (conn *Connection) Close() {
-	if err := conn.sniffer.close(); err != nil {
-		conn.t.Fatal(err)
-	}
-	if err := conn.injector.close(); err != nil {
-		conn.t.Fatal(err)
-	}
+	errs := multierr.Combine(conn.sniffer.close(), conn.injector.close())
 	for _, s := range conn.layerStates {
 		if err := s.close(); err != nil {
-			conn.t.Fatalf("unable to close %+v: %s", s, err)
+			errs = multierr.Append(errs, fmt.Errorf("unable to close %+v: %s", s, err))
 		}
 	}
+	if errs != nil {
+		conn.t.Fatalf("unable to close %+v: %s", conn, errs)
+	}
 }
 
 // CreateFrame builds a frame for the connection with layer overriding defaults