p2p/discover, p2p/discv5: use netutil.IsTemporaryError

p2p/discover/udp.go

@@ -479,13 +479,6 @@ func encodePacket(priv *ecdsa.PrivateKey, ptype byte, req interface{}) ([]byte,
 	return packet, nil
 }
 
-func isTemporaryError(err error) bool {
-	tempErr, ok := err.(interface {
-		Temporary() bool
-	})
-	return ok && tempErr.Temporary() || isPacketTooBig(err)
-}
-
 // readLoop runs in its own goroutine. it handles incoming UDP packets.
 func (t *udp) readLoop() {
 	defer t.conn.Close()
@@ -495,7 +488,7 @@ func (t *udp) readLoop() {
 	buf := make([]byte, 1280)
 	for {
 		nbytes, from, err := t.conn.ReadFromUDP(buf)
-		if isTemporaryError(err) {
+		if netutil.IsTemporaryError(err) {
 			// Ignore temporary read errors.
 			glog.V(logger.Debug).Infof("Temporary read error: %v", err)
 			continue

p2p/discover/udp_notwindows.go

@@ -1,26 +0,0 @@
-// Copyright 2016 The go-ethereum Authors
-// This file is part of the go-ethereum library.
-//
-// The go-ethereum library is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Lesser General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// The go-ethereum library is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU Lesser General Public License for more details.
-//
-// You should have received a copy of the GNU Lesser General Public License
-// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
-
-//+build !windows
-
-package discover
-
-// reports whether err indicates that a UDP packet didn't
-// fit the receive buffer. There is no such error on
-// non-Windows platforms.
-func isPacketTooBig(err error) bool {
-	return false
-}

p2p/discover/udp_test.go

@@ -43,56 +43,6 @@ func init() {
 	spew.Config.DisableMethods = true
 }
 
-// This test checks that isPacketTooBig correctly identifies
-// errors that result from receiving a UDP packet larger
-// than the supplied receive buffer.
-func TestIsPacketTooBig(t *testing.T) {
-	listener, err := net.ListenPacket("udp", "127.0.0.1:0")
-	if err != nil {
-		t.Fatal(err)
-	}
-	defer listener.Close()
-	sender, err := net.Dial("udp", listener.LocalAddr().String())
-	if err != nil {
-		t.Fatal(err)
-	}
-	defer sender.Close()
-
-	sendN := 1800
-	recvN := 300
-	for i := 0; i < 20; i++ {
-		go func() {
-			buf := make([]byte, sendN)
-			for i := range buf {
-				buf[i] = byte(i)
-			}
-			sender.Write(buf)
-		}()
-
-		buf := make([]byte, recvN)
-		listener.SetDeadline(time.Now().Add(1 * time.Second))
-		n, _, err := listener.ReadFrom(buf)
-		if err != nil {
-			if nerr, ok := err.(net.Error); ok && nerr.Timeout() {
-				continue
-			}
-			if !isPacketTooBig(err) {
-				t.Fatal("unexpected read error:", spew.Sdump(err))
-			}
-			continue
-		}
-		if n != recvN {
-			t.Fatalf("short read: %d, want %d", n, recvN)
-		}
-		for i := range buf {
-			if buf[i] != byte(i) {
-				t.Fatalf("error in pattern")
-				break
-			}
-		}
-	}
-}
-
 // shared test variables
 var (
 	futureExp          = uint64(time.Now().Add(10 * time.Hour).Unix())

p2p/discover/udp_windows.go

@@ -1,40 +0,0 @@
-// Copyright 2016 The go-ethereum Authors
-// This file is part of the go-ethereum library.
-//
-// The go-ethereum library is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Lesser General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// The go-ethereum library is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU Lesser General Public License for more details.
-//
-// You should have received a copy of the GNU Lesser General Public License
-// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
-
-//+build windows
-
-package discover
-
-import (
-	"net"
-	"os"
-	"syscall"
-)
-
-const _WSAEMSGSIZE = syscall.Errno(10040)
-
-// reports whether err indicates that a UDP packet didn't
-// fit the receive buffer. On Windows, WSARecvFrom returns
-// code WSAEMSGSIZE and no data if this happens.
-func isPacketTooBig(err error) bool {
-	if opErr, ok := err.(*net.OpError); ok {
-		if scErr, ok := opErr.Err.(*os.SyscallError); ok {
-			return scErr.Err == _WSAEMSGSIZE
-		}
-		return opErr.Err == _WSAEMSGSIZE
-	}
-	return false
-}

p2p/discv5/udp.go

@@ -385,7 +385,7 @@ func (t *udp) readLoop() {
 	buf := make([]byte, 1280)
 	for {
 		nbytes, from, err := t.conn.ReadFromUDP(buf)
-		if isTemporaryError(err) {
+		if netutil.IsTemporaryError(err) {
 			// Ignore temporary read errors.
 			glog.V(logger.Debug).Infof("Temporary read error: %v", err)
 			continue
@@ -398,13 +398,6 @@ func (t *udp) readLoop() {
 	}
 }
 
-func isTemporaryError(err error) bool {
-	tempErr, ok := err.(interface {
-		Temporary() bool
-	})
-	return ok && tempErr.Temporary() || isPacketTooBig(err)
-}
-
 func (t *udp) handlePacket(from *net.UDPAddr, buf []byte) error {
 	pkt := ingressPacket{remoteAddr: from}
 	if err := decodePacket(buf, &pkt); err != nil {

p2p/discv5/udp_notwindows.go

@@ -1,26 +0,0 @@
-// Copyright 2016 The go-ethereum Authors
-// This file is part of the go-ethereum library.
-//
-// The go-ethereum library is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Lesser General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// The go-ethereum library is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU Lesser General Public License for more details.
-//
-// You should have received a copy of the GNU Lesser General Public License
-// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
-
-//+build !windows
-
-package discv5
-
-// reports whether err indicates that a UDP packet didn't
-// fit the receive buffer. There is no such error on
-// non-Windows platforms.
-func isPacketTooBig(err error) bool {
-	return false
-}

p2p/discv5/udp_test.go

@@ -36,56 +36,6 @@ func init() {
 	spew.Config.DisableMethods = true
 }
 
-// This test checks that isPacketTooBig correctly identifies
-// errors that result from receiving a UDP packet larger
-// than the supplied receive buffer.
-func TestIsPacketTooBig(t *testing.T) {
-	listener, err := net.ListenPacket("udp", "127.0.0.1:0")
-	if err != nil {
-		t.Fatal(err)
-	}
-	defer listener.Close()
-	sender, err := net.Dial("udp", listener.LocalAddr().String())
-	if err != nil {
-		t.Fatal(err)
-	}
-	defer sender.Close()
-
-	sendN := 1800
-	recvN := 300
-	for i := 0; i < 20; i++ {
-		go func() {
-			buf := make([]byte, sendN)
-			for i := range buf {
-				buf[i] = byte(i)
-			}
-			sender.Write(buf)
-		}()
-
-		buf := make([]byte, recvN)
-		listener.SetDeadline(time.Now().Add(1 * time.Second))
-		n, _, err := listener.ReadFrom(buf)
-		if err != nil {
-			if nerr, ok := err.(net.Error); ok && nerr.Timeout() {
-				continue
-			}
-			if !isPacketTooBig(err) {
-				t.Fatal("unexpected read error:", spew.Sdump(err))
-			}
-			continue
-		}
-		if n != recvN {
-			t.Fatalf("short read: %d, want %d", n, recvN)
-		}
-		for i := range buf {
-			if buf[i] != byte(i) {
-				t.Fatalf("error in pattern")
-				break
-			}
-		}
-	}
-}
-
 // shared test variables
 var (
 	futureExp          = uint64(time.Now().Add(10 * time.Hour).Unix())

p2p/discv5/udp_windows.go

@@ -1,40 +0,0 @@
-// Copyright 2016 The go-ethereum Authors
-// This file is part of the go-ethereum library.
-//
-// The go-ethereum library is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Lesser General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// The go-ethereum library is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU Lesser General Public License for more details.
-//
-// You should have received a copy of the GNU Lesser General Public License
-// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
-
-//+build windows
-
-package discv5
-
-import (
-	"net"
-	"os"
-	"syscall"
-)
-
-const _WSAEMSGSIZE = syscall.Errno(10040)
-
-// reports whether err indicates that a UDP packet didn't
-// fit the receive buffer. On Windows, WSARecvFrom returns
-// code WSAEMSGSIZE and no data if this happens.
-func isPacketTooBig(err error) bool {
-	if opErr, ok := err.(*net.OpError); ok {
-		if scErr, ok := opErr.Err.(*os.SyscallError); ok {
-			return scErr.Err == _WSAEMSGSIZE
-		}
-		return opErr.Err == _WSAEMSGSIZE
-	}
-	return false
-}