Scheduler used for after our SYN has been sent and ACKed but one (or more) sides haven't closed the stream yet. In addition, the stream must be using the BULK profile, rather than the INTERACTIVE profile.

Entry conditions:

• Packets sent and ACKs received.
• At least one direction is not closed

Events:

• Packets received (which may or may not ACK the ones sent)
• Message flush (explicitly, through a full buffer, or stream closure)
• RESET received
• Message sending fails (error talking to the session)
• Message sending fails (too many resends)

Next states:

• closing - after both sending and receiving a CLOSE
• closed - after both sending and receiving ACKs on the CLOSE
• dead - after sending or receiving a RESET