The unix-domain socket to AF_VSOCK multiplexers in Firecracker and vhost-device-vsock sends OK PORT response to the client, resulting ssh clients to abort the connection with the additional response. This patch addresses this issue by waiting and expecting the possible OK PORT response from the multiplexer, if any, and then handover the socket fd to the ssh client. It only checks if the response begins with OK and consume the response till the first \n, for simplicity. Signed-off-by: Miao Wang <shankerwangmiao@gmail.com>
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