chore: make lint happy

.golangci.yml

@@ -0,0 +1,73 @@
+linters-settings:
+  errcheck:
+    ignore: fmt:.*,io/ioutil:^Read.*
+    ignoretests: true
+    exclude-functions:
+      - github.com/fumiama/WireGold/helper.(*Writer).Write.*
+      - github.com/fumiama/WireGold/upper/services/tunnel.(*Tunnel).(Write|Read)
+
+  goimports:
+    local-prefixes: github.com/fumiama/WireGold
+
+linters:
+  # please, do not use `enable-all`: it's deprecated and will be removed soon.
+  # inverted configuration with `enable-all` and `disable` is not scalable during updates of golangci-lint
+  disable-all: true
+  fast: false
+  enable:
+    - bodyclose
+    #- deadcode
+    #- depguard
+    - dogsled
+    - dupl
+    - errcheck
+    - exportloopref
+    - exhaustive
+    #- funlen
+    #- goconst
+    #- gocritic
+    #- gocyclo
+    - gofumpt
+    - goimports
+    - goprintffuncname
+    #- gosec
+    - gosimple
+    - govet
+    - ineffassign
+    - misspell
+    - nolintlint
+    - rowserrcheck
+    - staticcheck
+    #- structcheck
+    #- stylecheck
+    - typecheck
+    - unconvert
+    - unparam
+    - unused
+    #- varcheck
+    - whitespace
+    - prealloc
+    - predeclared
+    - asciicheck
+    #- revive
+    - makezero
+    #- interfacer
+
+
+run:
+  # default concurrency is a available CPU number.
+  # concurrency: 4 # explicitly omit this value to fully utilize available resources.
+  deadline: 5m
+  issues-exit-code: 1
+  tests: false
+
+# output configuration options
+output:
+  format: 'colored-line-number'
+  print-issued-lines: true
+  print-linter-name: true
+  uniq-by-line: true
+
+issues:
+  # Fix found issues (if it's supported by the linter)
+  fix: true

gold/link/listen.go

@@ -157,8 +157,12 @@ func (m *Me) listenthread(packet *head.Packet, addr *net.UDPAddr, index int, fin
 				p.pipe <- packet
 				logrus.Debugln("[listen] @", index, "deliver to pipe of", p.peerip)
 			} else {
-				m.nic.Write(packet.Data)
-				logrus.Debugln("[listen] @", index, "deliver", len(packet.Data), "bytes data to nic")
+				_, err := m.nic.Write(packet.Data)
+				if err != nil {
+					logrus.Errorln("[listen] @", index, "deliver", len(packet.Data), "bytes data to nic err:", err)
+				} else {
+					logrus.Debugln("[listen] @", index, "deliver", len(packet.Data), "bytes data to nic")
+				}
 				packet.Put()
 			}
 		default:

gold/link/me.go

@@ -121,7 +121,7 @@ func (m *Me) MTU() uint16 {
 	return m.mtu
 }
 
-func (m *Me) Close() error {
+func (m *Me) CloseNIC() error {
 	m.nic.Down()
 	return m.nic.Close()
 }
@@ -132,7 +132,7 @@ func (m *Me) Write(packet []byte) (n int, err error) {
 	return
 }
 
-func (m *Me) ListenFromNIC() (written int64, err error) {
+func (m *Me) ListenNIC() (written int64, err error) {
 	m.nic.Up()
 	return io.Copy(m, m.nic)
 }

gold/link/nat.go

@@ -86,8 +86,12 @@ func (l *Link) onQuery(packet []byte) {
 	if len(notify) > 0 {
 		logrus.Infoln("[nat] query wrap", len(notify), "notify")
 		w := helper.SelectWriter()
-		json.NewEncoder(w).Encode(&notify)
-		l.WriteAndPut(head.NewPacket(head.ProtoNotify, l.me.srcport, l.peerip, l.me.dstport, w.Bytes()), false)
+		_ = json.NewEncoder(w).Encode(&notify)
+		_, err = l.WriteAndPut(head.NewPacket(head.ProtoNotify, l.me.srcport, l.peerip, l.me.dstport, w.Bytes()), false)
+		if err != nil {
+			logrus.Errorln("[nat] notify peer", l, "err:", err)
+			return
+		}
 		helper.PutWriter(w)
 	}
 }

upper/services/wg/wg.go

@@ -49,20 +49,19 @@ func NewWireGold(c *config.Config) (wg WG, err error) {
 }
 
 func (wg *WG) Start(srcport, destport uint16) {
-	wg.init(srcport, destport)
-	go wg.me.ListenFromNIC()
+	go wg.Run(srcport, destport)
 }
 
 func (wg *WG) Run(srcport, destport uint16) {
 	wg.init(srcport, destport)
-	_, err := wg.me.ListenFromNIC()
+	_, err := wg.me.ListenNIC()
 	if err != nil {
 		logrus.Panicln(err)
 	}
 }
 
 func (wg *WG) Stop() {
-	_ = wg.me.Close()
+	_ = wg.me.CloseNIC()
 }
 
 func (wg *WG) init(srcport, dstport uint16) {