State Transition Descriptions for

- initiator: Transport connect request was made (e.g., TCP SYN sent).

- target: Illegal.

T2:

- initiator: Transport connection request timed out, a transport reset was received, or an internal event of

receiving a Logout Response (success) on another connection for a "close the session" Logout Request was received.

- target: Illegal.

T3:

- initiator: Illegal.

- target: Received a valid transport connection request that establishes the transport connection.

T4:

- initiator: Transport connection established, thus prompting the initiator to start the iSCSI Login.

- target: Initial iSCSI Login Request was received.

T5:

- initiator: The final iSCSI Login Response with a Status-Class of zero was received.

- target: The final iSCSI Login Request to conclude the

Login Phase was received, thus prompting the target to send the final iSCSI Login Response with a Status-Class of zero.

T6:

- initiator: Illegal.

- target: Timed out waiting for an iSCSI Login, transport disconnect indication was received, transport reset was received, or an internal event indicating a transport

timeout was received. In all these cases, the connection is to be closed.

T7:

- initiator: One of the following events caused the transition:

a) The final iSCSI Login Response was received with a non-zero Status-Class.

b) Login timed out.

c) A transport disconnect indication was received.

d) A transport reset was received.

e) An internal event indicating a transport timeout was received.

f) An internal event of receiving a Logout Response (success) on another connection for a "close the session" Logout Request was received.

In all these cases, the transport connection is closed.

- target: One of the following events caused the transition:

a) The final iSCSI Login Request to conclude the Login Phase was received, prompting the target to send the final iSCSI Login Response with a non-zero Status-Class.

b) Login timed out.

c) A transport disconnect indication was received.

d) A transport reset was received.

e) An internal event indicating a transport timeout was received.

f) On another connection, a "close the session" Logout Request was received.

In all these cases, the connection is to be closed.

T8:

- initiator: An internal event of receiving a Logout

Response (success) on another connection for a "close the session" Logout Request was received, thus closing this connection and requiring no further cleanup.

- target: An internal event of sending a Logout Response (success) on another connection for a "close the session"

Logout Request was received, or an internal event of a successful connection/session reinstatement was received, thus prompting the target to close this connection cleanly.

T9, T10:

- initiator: An internal event that indicates the readiness to start the Logout process was received, thus prompting an iSCSI Logout to be sent by the initiator.

- target: An iSCSI Logout Request was received.

T11, T12:

- initiator: An Async PDU with AsyncEvent "Request Logout"

was received.

- target: An internal event that requires the decommissioning of the connection was received, thus causing an Async PDU with an AsyncEvent "Request Logout" to be sent.

T13:

- initiator: An iSCSI Logout Response (success) was received, or an internal event of receiving a Logout Response (success) on another connection for a "close the session" Logout Request was received.

- target: An internal event was received that indicates

successful processing of the Logout, which prompts an iSCSI Logout Response (success) to be sent; an internal event of sending a Logout Response (success) on another connection for a "close the session" Logout Request was received; or

an internal event of a successful connection/session reinstatement was received. In all these cases, the transport connection is closed.

T14:

- initiator: An Async PDU with AsyncEvent "Request Logout"

was received again.

- target: Illegal.

T15, T16:

- initiator: One or more of the following events caused this transition:

a) An internal event that indicates a transport connection timeout was received, thus prompting a transport reset or transport connection closure.

b) A transport reset was received.

c) A transport disconnect indication was received.

d) An Async PDU with AsyncEvent "Drop connection" (for this CID) was received.

e) An Async PDU with AsyncEvent "Drop all connections" was received.

- target: One or more of the following events caused this transition:

a) Internal event that indicates that a transport connection timeout was received, thus prompting a transport reset or transport connection closure.

b) An internal event of a failed connection/session reinstatement was received.

c) A transport reset was received.

d) A transport disconnect indication was received.

e) An internal emergency cleanup event was received, which prompts an Async PDU with AsyncEvent "Drop connection" (for this CID), or event "Drop all connections".

T17:

- initiator: One or more of the following events caused this transition:

a) A Logout Response (failure, i.e., a non-zero status) was received, or Logout timed out.

b) Any of the events specified for T15 and T16 occurred.

- target: One or more of the following events caused this transition:

a) An internal event that indicates a failure of the Logout processing was received, which prompts a Logout Response (failure, i.e., a non-zero status) to be sent.

b) Any of the events specified for T15 and T16 occurred.

T18:

- initiator: An internal event of receiving a Logout

Response (success) on another connection for a "close the session" Logout Request was received.

- target: An internal event of sending a Logout Response (success) on another connection for a "close the session"

Logout Request was received, or an internal event of a successful connection/session reinstatement was received.

In both these cases, the connection is closed.

The CLEANUP_WAIT state (S8) implies that there are possible iSCSI tasks that have not reached conclusion and are still considered busy.

8.1.3. Standard Connection State Diagram for an Initiator