Unidirectional close does not work on NAT port forwards

[Martin Stjernholm]

I have a setup with a tcp server in a windows vista guest. This server listens to a port which the NAT forwards connections to from the outside. I (normally) connect to the tcp server from a client on the linux host via the lo interface.

The client opens a connection, writes a request and then closes the write side of the connection (shutdown(2) with SHUT_WR). After this, the client waits for a response on the read end. The server sends several packets of response data, but the client only receives the first packet.

Observations:

If I don't close the write side on the client, it gets all packets.

If I connect to the server from inside the vista guest, it works with the write side close in the client (using winsock shutdown).

I believe this worked in VirtualBox 2.1, but I'm not certain.

I've verified that the server does not depend on the close of its read end to start sending a response.

[vasily Levchenko]

Could you please attach the log file? Does it change with ​3.0.6 b1?

[Martin Stjernholm]

Log added. A request which got prematurely closed was made at the end.

The problem is the same in 3.0.6 b1.

[vasily Levchenko]

Is it acceptable for you to share your application with me to have good testcase? If yes or with some conditions please contact me at [vasily _dot_ levchenko _at_ Sun _dot_ COM]