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