1 files changed, 37 insertions, 0 deletions
diff --git a/libpod/network/internal/util/parse.go b/libpod/network/internal/util/parse.go
new file mode 100644
index 000000000..1f68df0bb
--- /dev/null
+++ b/libpod/network/internal/util/parse.go
@@ -0,0 +1,37 @@
+package util
+
+import (
+	"strconv"
+
+	"github.com/pkg/errors"
+)
+
+// ParseMTU parses the mtu option
+func ParseMTU(mtu string) (int, error) {
+	if mtu == "" {
+		return 0, nil // default
+	}
+	m, err := strconv.Atoi(mtu)
+	if err != nil {
+		return 0, err
+	}
+	if m < 0 {
+		return 0, errors.Errorf("mtu %d is less than zero", m)
+	}
+	return m, nil
+}
+
+// ParseVlan parses the vlan option
+func ParseVlan(vlan string) (int, error) {
+	if vlan == "" {
+		return 0, nil // default
+	}
+	v, err := strconv.Atoi(vlan)
+	if err != nil {
+		return 0, err
+	}
+	if v < 0 || v > 4094 {
+		return 0, errors.Errorf("vlan ID %d must be between 0 and 4094", v)
+	}
+	return v, nil
+}