Fix deadlock waiting for read or write on closed connection.

If the system is suspended then it may not realise that a TCP connection has
been closed, while waiting for data to arrive on it. We didn't used to apply
a timeout to this read operation. Now we use the connection's default timeout
on all read and write operations. Network operations that don't pass a timeout
will be logged with a backtrace, so that they can be fixed.

1 files changed, 2 insertions, 1 deletions

diff --git a/lib/common/IOStream.h b/lib/common/IOStream.h
index 81f1cfa6..a4eb3db1 100644
--- a/lib/common/IOStream.h
+++ b/lib/common/IOStream.h
@@ -47,7 +47,8 @@ public:
 	typedef int64_t pos_type;
 	virtual int Read(void *pBuffer, int NBytes, int Timeout = IOStream::TimeOutInfinite) = 0;
 	virtual pos_type BytesLeftToRead();	// may return IOStream::SizeOfStreamUnknown (and will for most stream types)
-	virtual void Write(const void *pBuffer, int NBytes) = 0;
+	virtual void Write(const void *pBuffer, int NBytes,
+		int Timeout = IOStream::TimeOutInfinite) = 0;
 	virtual void Write(const char *pBuffer);
 	virtual void WriteAllBuffered();
 	virtual pos_type GetPosition() const;