fix a bug in VLANS.UnmarshalText

etherconn.go

@@ -182,6 +182,9 @@ func (vlans *VLANs) UnmarshalText(text []byte) error {
 	flist := strings.Split(inputs, sep)
 	r := new(VLANs)
 	for _, v := range flist {
+		if v == "" {
+			continue
+		}
 		n, err := strconv.Atoi(v)
 		if err != nil {
 			return fmt.Errorf("%v is not valid number", v)

etherconn_test.go

@@ -787,13 +787,64 @@ func TestRUDPConn(t *testing.T) {
 type testVLANsCase struct {
 	v          etherconn.VLANs
 	vs         string
+	umvs       string
 	newIDs     []uint16
 	newv       etherconn.VLANs
 	shouldFail bool
 }
 
 func TestVLANs(t *testing.T) {
 	testCaseList := []testVLANsCase{
+		{
+			v: etherconn.VLANs{
+				&etherconn.VLAN{
+					ID:        300,
+					EtherType: 0x8100,
+				},
+			},
+			vs:     "|300",
+			newIDs: []uint16{111},
+			newv: etherconn.VLANs{
+				&etherconn.VLAN{
+					ID:        111,
+					EtherType: 0x8100,
+				},
+			},
+		},
+		{
+			v: etherconn.VLANs{
+				&etherconn.VLAN{
+					ID:        300,
+					EtherType: 0x8100,
+				},
+			},
+			vs:     "|300",
+			umvs:   ".300",
+			newIDs: []uint16{111},
+			newv: etherconn.VLANs{
+				&etherconn.VLAN{
+					ID:        111,
+					EtherType: 0x8100,
+				},
+			},
+		},
+		{
+			v: etherconn.VLANs{
+				&etherconn.VLAN{
+					ID:        300,
+					EtherType: 0x8100,
+				},
+			},
+			vs:     "|300",
+			umvs:   "300",
+			newIDs: []uint16{111},
+			newv: etherconn.VLANs{
+				&etherconn.VLAN{
+					ID:        111,
+					EtherType: 0x8100,
+				},
+			},
+		},
 		{
 			v: etherconn.VLANs{
 				&etherconn.VLAN{
@@ -806,6 +857,32 @@ func TestVLANs(t *testing.T) {
 				},
 			},
 			vs:     "|100|200",
+			umvs:   "100.200",
+			newIDs: []uint16{111, 222},
+			newv: etherconn.VLANs{
+				&etherconn.VLAN{
+					ID:        111,
+					EtherType: 0x8100,
+				},
+				&etherconn.VLAN{
+					ID:        222,
+					EtherType: 0x8200,
+				},
+			},
+		},
+		{
+			v: etherconn.VLANs{
+				&etherconn.VLAN{
+					ID:        100,
+					EtherType: 0x8100,
+				},
+				&etherconn.VLAN{
+					ID:        200,
+					EtherType: 0x8200,
+				},
+			},
+			vs:     "|100|200",
+			umvs:   "100|200",
 			newIDs: []uint16{111, 222},
 			newv: etherconn.VLANs{
 				&etherconn.VLAN{
@@ -818,7 +895,6 @@ func TestVLANs(t *testing.T) {
 				},
 			},
 		},
-
 		{
 			v: etherconn.VLANs{
 				&etherconn.VLAN{
@@ -849,6 +925,18 @@ func TestVLANs(t *testing.T) {
 		if c.v.String() != c.vs {
 			return fmt.Errorf("c.v string %v is different from expected %v", c.v.String(), c.vs)
 		}
+		ustr := c.vs
+		if c.umvs != "" {
+			ustr = c.umvs
+		}
+		newvlan := new(etherconn.VLANs)
+		if err := newvlan.UnmarshalText([]byte(ustr)); err != nil {
+			return fmt.Errorf("failed to unmarshal %v, %w", c.vs, err)
+		}
+		if newvlan.String() != c.v.String() {
+			return fmt.Errorf("unmarshaled vlan %v is different from expected %v", newvlan.String(), c.v.String())
+		}
+
 		err := c.v.SetIDs(c.newIDs)
 		if err != nil {
 			return err

example/go.mod

@@ -15,8 +15,8 @@ require (
 	github.com/cilium/ebpf v0.4.0 // indirect
 	github.com/safchain/ethtool v0.0.0-20201023143004-874930cb3ce0 // indirect
 	github.com/vishvananda/netns v0.0.0-20210104183010-2eb08e3e575f // indirect
-	golang.org/x/net v0.17.0 // indirect
-	golang.org/x/sys v0.13.0 // indirect
+	golang.org/x/net v0.7.0 // indirect
+	golang.org/x/sys v0.5.0 // indirect
 )
 
 replace github.com/hujun-open/etherconn => ../

example/go.sum

@@ -32,8 +32,8 @@ golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzB
 golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20190923162816-aa69164e4478/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
-golang.org/x/net v0.17.0 h1:pVaXccu2ozPjCXewfr1S7xza/zcXTity9cCdXQYSjIM=
-golang.org/x/net v0.17.0/go.mod h1:NxSsAGuq816PNPmqtQdLE42eU2Fs7NoRIZrHJAlaCOE=
+golang.org/x/net v0.7.0 h1:rJrUqqhjsgNp7KqAIc25s9pZnjU7TUcSY7HcVZjdn1g=
+golang.org/x/net v0.7.0/go.mod h1:2Tu9+aMcznHK/AK1HMvgo6xiTLG5rD5rZLDS+rp2Bjs=
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
@@ -42,8 +42,8 @@ golang.org/x/sys v0.0.0-20190924154521-2837fb4f24fe/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20200217220822-9197077df867/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210324051608-47abb6519492/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.13.0 h1:Af8nKPmuFypiUBjVoU9V20FiaFXOcuZI21p0ycVYYGE=
-golang.org/x/sys v0.13.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.5.0 h1:MUK/U/4lj1t1oPg0HfuXDN/Z1wv31ZJ/YcPiGccS4DU=
+golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/tools v0.0.0-20191216052735-49a3e744a425/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
 golang.org/x/tools v0.0.0-20200130002326-2f3ba24bd6e7/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=

go.mod

@@ -9,8 +9,8 @@ require (
 	github.com/hujun-open/myaddr v0.0.0-20200628224706-46a60dd3e36b
 	github.com/safchain/ethtool v0.0.0-20201023143004-874930cb3ce0
 	github.com/vishvananda/netlink v1.1.0
-	golang.org/x/net v0.17.0
-	golang.org/x/sys v0.13.0
+	golang.org/x/net v0.7.0
+	golang.org/x/sys v0.5.0
 )
 
 require (