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digraph G {
rankdir=TB
labelloc=t; label="PFCP CP peer FSM\nControl Plane side, managing association with remote UP peer"
cp [label="CP function",shape="box"]
cp -> DISABLED [label="cp_peer_alloc()"]
cp -> WAIT_ASSOC_SETUP_RESP [label="cp_peer_associate()"]
txrx [label="PFCP socket",shape="box"]
WAIT_ASSOC_SETUP_RESP -> txrx [label="tx_assoc_setup_req()",style=dotted]
txrx -> WAIT_ASSOC_SETUP_RESP [label="EV_RX_ASSOC_SETUP_RESP",style=dotted]
WAIT_ASSOC_SETUP_RESP -> ASSOCIATED [label="Assoc Setup Resp"]
WAIT_ASSOC_SETUP_RESP -> WAIT_ASSOC_SETUP_RESP [label="retry"]
heartbeat [label="PFCP heartbeat FSM",shape=box3d]
ASSOCIATED -> heartbeat [label="alloc()",style=dotted]
heartbeat -> ASSOCIATED [label="EV_HEARTBEAT_FAILURE",style=dotted]
txrx2 [label="PFCP socket",shape="box"]
txrx2 -> ASSOCIATED [label="EV_RX_ASSOC_UPDATE_REQ\n3GPP TS 29.244 6.2.7.3.1",style=dotted]
GRACEFUL_RELEASE -> txrx2 [label="tx_assoc_update_resp()",style=dotted]
cp_session [label="PFCP CP session FSM",shape=box3d]
cp -> ASSOCIATED [label="cp_peer_session_create()",style=dotted]
ASSOCIATED -> cp_session [label="cp_session_create()",style=dotted]
cp -> cp_session [style=invisible,arrowhead=none]
ASSOCIATED -> GRACEFUL_RELEASE [label="Association Update\nindicating graceful release"]
cp -> ASSOCIATED [label="cp_peer_release()",style=dotted]
ASSOCIATED -> term [label="cp_peer_release()\nHeartbeat failure"]
ASSOCIATED -> WAIT_ASSOC_SETUP_RESP [label="Heartbeat failure"]
GRACEFUL_RELEASE -> term
term [shape="octagon"]
}
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