mssql: expose server version info (#1741)

Signed-off-by: Jan-Otto Kröpke <mail@jkroepke.de>

internal/headers/iphlpapi/iphlpapi_test.go

@@ -0,0 +1,34 @@
+package iphlpapi_test
+
+import (
+	"net"
+	"os"
+	"testing"
+
+	"github.com/prometheus-community/windows_exporter/internal/headers/iphlpapi"
+	"github.com/stretchr/testify/require"
+	"golang.org/x/sys/windows"
+)
+
+func TestGetTCPConnectionStates(t *testing.T) {
+	t.Parallel()
+
+	pid, err := iphlpapi.GetTCPConnectionStates(windows.AF_INET)
+	require.NoError(t, err)
+	require.NotEmpty(t, pid)
+}
+
+func TestGetOwnerPIDOfTCPPort(t *testing.T) {
+	t.Parallel()
+
+	lister, err := net.Listen("tcp", "127.0.0.1:0")
+	require.NoError(t, err)
+
+	t.Cleanup(func() {
+		require.NoError(t, lister.Close())
+	})
+
+	pid, err := iphlpapi.GetOwnerPIDOfTCPPort(windows.AF_INET, uint16(lister.Addr().(*net.TCPAddr).Port))
+	require.NoError(t, err)
+	require.EqualValues(t, os.Getpid(), pid)
+}