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SimplePPKS.tla
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----------------------------- MODULE SimplePPKS -----------------------------
EXTENDS Naturals
CONSTANTS
BOp, EOp, Exper,
Broker, Endpoint, Controller,
EOpIntention, ExperIntention,
BOpAllowedEOp, BOpAllowedExper, EOpAllowedExper, EOpAllowedExp,
BOpOwnedBroker, EOpOwnedEndpoint, ExperOwnedController,
Channel, Exp, SNI, empty_msg, null_info
-----------------------------------------------------------------------------
(***************************************************************************)
(* Principal interaction messages *)
(***************************************************************************)
RequestSubPrivilegeMsgs ==
[type: {"req_sub_priv"}, seq:Nat, sender: EOp, receiver: BOp, channel: Channel]
\cup
[type: {"rsp_sub_priv"}, seq:Nat, sender: BOp, receiver: EOp, broker: Broker]
\cup
[type: {"rsp_sub_priv_f"}, seq:Nat, sender: BOp, receiver: EOp]
RequestPubPrivilegeMsgs ==
[type: {"req_pub_priv"}, seq:Nat, sender: Exper, receiver: BOp, broker: Broker]
\cup
[type: {"rsp_pub_priv"}, seq:Nat, sender: BOp, receiver: Exper]
\cup
[type: {"rsp_pub_priv_f"}, seq:Nat, sender: BOp, receiver: Exper]
RequestExpPrivilegeMsgs ==
[type: {"req_exp_priv"}, seq:Nat, sender: Exper, receiver: EOp, exp: Exp]
\cup
[type: {"rsp_exp_priv"}, seq:Nat, sender: EOp, receiver: Exper,
broker_owner: BOp, broker: Broker, channel: Channel, exp_priv: Exp]
\cup
[type: {"rsp_exp_priv_f"}, seq:Nat, sender: EOp, receiver: Exper]
(***************************************************************************)
(* Agent interaction messages *)
(***************************************************************************)
RequestSubMsgs ==
[type: {"cmd_sub"}, seq:Nat, sender: EOp, receiver: Endpoint,
broker: Broker, channel: Channel]
\cup
[type: {"ack_cmd_sub"}, seq:Nat, sender: Endpoint, receiver: EOp]
\cup
[type: {"nack_cmd_sub"}, seq:Nat, sender: Endpoint, receiver: EOp]
\cup
[type: {"req_sub"}, seq:Nat, sender: Endpoint, receiver: Broker,
owner: EOp, channel: Channel]
\cup
[type: {"rsp_sub"}, seq:Nat, sender: Broker, receiver: Endpoint]
\cup
[type: {"rsp_sub_f"}, seq:Nat, sender: Broker, receiver: Endpoint]
\cup
[type: {"auth_sub_req"}, seq:Nat, sender: Broker, receiver: BOp,
origin: Endpoint, owner: EOp, channel: Channel]
\cup
[type: {"ack_auth_sub_req"}, seq:Nat, sender: BOp, receiver: Broker]
\cup
[type: {"nack_auth_sub_req"}, seq:Nat, sender: BOp, receiver: Broker]
\cup
[type: {"req_auth_sub_agent"}, seq:Nat, sender: BOp, receiver: EOp,
origin: Endpoint, target: Broker, channel: Channel]
\cup
[type: {"rsp_auth_sub_agent"}, seq:Nat, sender: EOp, receiver: BOp]
\cup
[type: {"rsp_auth_sub_agent_f"}, seq:Nat, sender: EOp, receiver: BOp]
RequestPubMsgs ==
[type: {"cmd_pub"}, seq:Nat, sender: Exper, receiver: Controller,
exp: Exp, broker: Broker, channel: Channel, sni: SNI]
\cup
[type: {"ack_cmd_pub"}, seq:Nat, sender: Controller, receiver: Exper]
\cup
[type: {"nack_cmd_sub"}, seq:Nat, sender: Controller, receiver: Exper]
\cup
[type: {"req_pub"}, seq:Nat, sender: Controller, receiver: Broker,
owner: Exper, exp: Exp, channel: Channel, sni: SNI]
\cup
[type: {"rsp_pub"}, seq:Nat, sender: Broker, receiver: Controller]
\cup
[type: {"rsp_pub_f"}, seq:Nat, sender: Broker, receiver: Controller]
\cup
[type: {"auth_pub_req"}, seq:Nat, sender: Broker, receiver: BOp,
origin: Controller, owner: Exper, exp: Exp, channel: Channel, sni: SNI]
\cup
[type: {"ack_auth_pub_req"}, seq:Nat, sender: BOp, receiver: Broker]
\cup
[type: {"nack_auth_pub_req"}, seq:Nat, sender: BOp, receiver: Broker]
\cup
[type: {"req_auth_pub_agent"}, seq:Nat, sender: BOp, receiver: Exper,
origin: Controller, target: Broker, channel: Channel, exp: Exp, sni: SNI]
\cup
[type: {"rsp_auth_pub_agent"}, seq:Nat, sender: Exper, receiver: BOp]
\cup
[type: {"rsp_auth_pub_agent_f"}, seq:Nat, sender: Exper, receiver: BOp]
NotifyAndRunExpMsgs ==
[type: {"notify_exp"}, seq:Nat, sender: Broker, receiver: Endpoint,
target: Controller, exp: Exp, channel: Channel, sni: SNI]
\cup
[type: {"auth_notify"}, seq:Nat, sender: Endpoint, receiver: EOp,
notifier: Broker, channel: Channel]
\cup
[type: {"ack_auth_notify"}, seq:Nat, sender: EOp, receiver: Endpoint]
\cup
[type: {"nack_auth_notify"}, seq:Nat, sender: EOp, receiver: Endpoint]
\cup
[type: {"connect"}, seq:Nat, sender: Endpoint, receiver: Controller, sni: SNI] \* for mimicing endpoint connection to controller
\cup
[type: {"conn_accepted"}, seq:Nat, sender: Controller, receiver: Endpoint]
\cup
[type: {"conn_refused"}, seq:Nat, sender: Controller, receiver: Endpoint]
\cup
[type: {"auth_sni"}, seq:Nat, sender: Controller, receiver: Exper, sni: SNI]
\cup
[type: {"ack_sni"}, seq:Nat, sender: Exper, receiver: Controller]
\cup
[type: {"nack_sni"}, seq:Nat, sender: Exper, receiver: Controller]
\cup
[type: {"req_run_exp"}, seq:Nat, sender: Controller, receiver: Endpoint,
owner: Exper]
\cup
[type: {"rsp_run_exp"}, seq:Nat, sender: Endpoint, receiver: Controller]
\cup
[type: {"rsp_run_exp_f"}, seq:Nat, sender: Endpoint, receiver: Controller]
\cup
[type: {"auth_exp"}, seq:Nat, sender: Endpoint, receiver: EOp,
origin: Controller, owner: Exper, exp: Exp, notifier: Broker, channel: Channel]
\cup
[type: {"ack_auth_exp"}, seq:Nat, sender: EOp, receiver: Endpoint, exp_priv: Exp]
\cup
[type: {"nack_auth_exp"}, seq:Nat, sender: EOp, receiver: Endpoint]
\cup
[type: {"req_auth_exp_agent"}, seq:Nat, sender: EOp, receiver: Exper,
origin: Controller, exp: Exp, notifier: Broker, channel: Channel]
\cup
[type: {"rsp_auth_exp_agent"}, seq:Nat, sender: Exper, receiver: EOp]
\cup
[type: {"rsp_auth_exp_agent_f"}, seq:Nat, sender: Exper, receiver: EOp]
\cup
[type: {"req_help_exp"}, seq:Nat, sender: Endpoint, receiver: Controller,
owner: EOp]
\cup
[type: {"rsp_help_exp"}, seq:Nat, sender: Controller, receiver: Endpoint]
\cup
[type: {"rsp_help_exp_f"}, seq:Nat, sender: Controller, receiver: Endpoint]
\cup
[type: {"auth_help"}, seq:Nat, sender: Controller, receiver: Exper,
owner: EOp, origin: Endpoint]
\cup
[type: {"ack_auth_help"}, seq:Nat, sender: Exper, receiver: Controller, exp: Exp]
\cup
[type: {"nack_auth_help"}, seq:Nat, sender: Exper, receiver: Controller]
\cup
[type: {"req_auth_help_agent"}, seq:Nat, sender: Exper, receiver: EOp,
helper: Endpoint]
\cup
[type: {"rsp_auth_help_agent"}, seq:Nat, sender: EOp, receiver: Exper]
\cup
[type: {"rsp_auth_help_agent_f"}, seq:Nat, sender: EOp, receiver: Exper]
\cup
[type: {"exec_exp"}, seq:Nat, sender: Controller, receiver: Endpoint, exp: Exp]
Messages ==
RequestSubPrivilegeMsgs
\cup
RequestPubPrivilegeMsgs
\cup
RequestExpPrivilegeMsgs
\cup
RequestSubMsgs
\cup
RequestPubMsgs
\cup
NotifyAndRunExpMsgs
-----------------------------------------------------------------------------
(***************************************************************************)
(* Entity state specification *)
(***************************************************************************)
VARIABLES
BOpState,
EOpState,
ExperState,
BrokerState,
EndpointState,
ControllerState,
msgs
vars == <<BOpState,
EOpState,
ExperState,
BrokerState,
EndpointState,
ControllerState,
msgs>>
TrackSeqSet == SUBSET ((BOp \cup EOp \cup Exper \cup Broker \cup Endpoint \cup Controller) \X SUBSET (Nat))
TypeOK ==
(*************************************************************************)
(* The type-correctness invariant. *)
(*************************************************************************)
\* Principal types
/\ BOpState \in [BOp -> [state: {"Idle", "AwaitAuthAgentPub", "AwaitAuthAgentSub"},
received_msg: Messages \cup {empty_msg},
sent_msg: Messages \cup {empty_msg},
sub_priv: SUBSET (EOp \X Channel \X Broker),
pub_priv: SUBSET (Exper \X Broker),
counter: Nat, track: TrackSeqSet]]
/\ EOpState \in [EOp -> [state: {"Idle", "AwaitSubPrivilege", "AwaitSub", "AwaitAuthAgentExp"},
received_msg: Messages \cup {empty_msg},
sent_msg: Messages \cup {empty_msg},
sub_priv: SUBSET (BOp \X Channel \X Broker),
exp_priv: SUBSET (Exper \X Channel \X Broker \X Exp),
sub_cmd: SUBSET (Endpoint \X Channel \X Broker),
unused_sub_priv: SUBSET (BOp \X Channel \X Broker),
sub_targets: SUBSET (BOp \X Channel),
counter: Nat, track: TrackSeqSet]]
/\ ExperState \in [Exper -> [state: {"Idle", "AwaitPubPrivilege", "AwaitExpPrivilege", "AwaitPub", "AwaitAuthAgentHelp"},
received_msg: Messages \cup {empty_msg},
sent_msg: Messages \cup {empty_msg},
pub_priv: SUBSET (BOp \X Broker),
exp_priv: SUBSET (EOp \X Channel \X Broker \X Exp \X Exp),
pub_cmd: SUBSET (Controller \X Exp \X Channel \X Broker \X SNI),
unused_pub_priv: SUBSET (BOp \X Broker),
unused_exp_priv: SUBSET (EOp \X Channel \X Broker \X Exp \X Exp),
run_targets: SUBSET (EOp \X Exp),
counter: Nat, track: TrackSeqSet]]
\* Agent types
/\ BrokerState \in [Broker -> [state: {"Idle", "AwaitSubAuth", "AwaitPubAuth"},
received_msg: Messages \cup {empty_msg},
sent_msg: Messages \cup {empty_msg},
sub_info: SUBSET (Endpoint \X Channel),
pub_info: SUBSET (Controller \X Exp \X Channel \X SNI),
notified: SUBSET (Endpoint \X Controller \X Exp \X Channel \X SNI),
counter: Nat, track: TrackSeqSet]]
/\ EndpointState \in [Endpoint -> [state: {"Idle", "AwaitSub", "AwaitNotifyAuth", "AwaitConn", "AwaitRunExp", "AwaitExpAuth", "AwaitHelpExp", "AwaitExp"},
received_msg: Messages \cup {empty_msg},
sent_msg: Messages \cup {empty_msg},
run_info: (Controller \X Exp) \cup {null_info},
executed_exp: SUBSET (Controller \X Exp),
counter: Nat, track: TrackSeqSet]]
/\ ControllerState \in [Controller -> [state: {"Idle", "AwaitPub", "AwaitSNIAuth", "AwaitRunExp", "AwaitHelpExp", "AwaitHelpAuth"},
received_msg: Messages \cup {empty_msg},
sent_msg: Messages \cup {empty_msg},
counter: Nat, track: TrackSeqSet]]
\* Others
/\ msgs \subseteq Messages
TrackSeqSetInit ==
{<<bo, {}>>: bo \in BOp} \cup
{<<eo, {}>>: eo \in EOp} \cup
{<<ep, {}>>: ep \in Exper} \cup
{<<b, {}>>: b \in Broker} \cup
{<<e, {}>>: e \in Endpoint} \cup
{<<c, {}>>: c \in Controller}
Init ==
(*************************************************************************)
(* The initial states. *)
(*************************************************************************)
/\ BOpState = [bo \in BOp |-> [state |-> "Idle",
received_msg |-> empty_msg,
sent_msg |-> empty_msg,
sub_priv |-> {},
pub_priv |-> {},
counter |-> 0,
track |-> TrackSeqSetInit]]
/\ EOpState = [eo \in EOp |-> [state |-> "Idle",
received_msg |-> empty_msg,
sent_msg |-> empty_msg,
sub_priv |-> {},
exp_priv |-> {},
sub_cmd |-> {},
unused_sub_priv |-> {},
sub_targets |-> (CHOOSE tup \in EOpIntention: tup[1] = eo)[2],
counter |-> 0,
track |-> TrackSeqSetInit]]
/\ ExperState = [ep \in Exper |-> [state |-> "Idle",
received_msg |-> empty_msg,
sent_msg |-> empty_msg,
pub_priv |-> {},
exp_priv |-> {},
pub_cmd |-> {},
unused_pub_priv |-> {},
unused_exp_priv |-> {},
run_targets |-> (CHOOSE tup \in ExperIntention: tup[1] = ep)[2],
counter |-> 0,
track |-> TrackSeqSetInit]]
/\ BrokerState = [b \in Broker |-> [state |-> "Idle",
received_msg |-> empty_msg,
sent_msg |-> empty_msg,
sub_info |-> {},
pub_info |-> {},
notified |-> {},
counter |-> 0,
track |-> TrackSeqSetInit]]
/\ EndpointState = [e \in Endpoint |-> [state |-> "Idle",
received_msg |-> empty_msg,
sent_msg |-> empty_msg,
run_info |-> null_info,
executed_exp |-> {},
counter |-> 0,
track |-> TrackSeqSetInit]]
/\ ControllerState = [c \in Controller |-> [state |-> "Idle",
received_msg |-> empty_msg,
sent_msg |-> empty_msg,
counter |-> 0,
track |-> TrackSeqSetInit]]
/\ msgs = {}
-----------------------------------------------------------------------------
(***************************************************************************)
(* Useful Definitions *)
(***************************************************************************)
UnseenSeq(track, entity, seq) ==
~seq \in (CHOOSE tup \in track: tup[1] = entity)[2]
UpdatedTrackSeqSet(orgtrack, entity, seq) ==
LET record == (CHOOSE tup \in orgtrack: tup[1] = entity)
IN (orgtrack \ {record}) \cup {<<record[1], record[2] \cup {seq}>>}
(***************************************************************************)
(* The actions. *)
(***************************************************************************)
(***************************************************************************)
(* BOp principal actions. *)
(***************************************************************************)
BOpPosRspReqSubPriv(bo) ==
/\ BOpState[bo].state = "Idle"
/\ \E m \in msgs :
/\ m.type = "req_sub_priv"
/\ m.sender \in EOp
/\ m.receiver = bo
/\ UnseenSeq(BOpState[bo].track, m.sender, m.seq)
/\ \E target_broker \in Broker:
/\ <<bo, m.sender, target_broker>> \in BOpAllowedEOp
/\ msgs' = msgs \cup
{[type |-> "rsp_sub_priv",
seq |-> m.seq,
sender |-> bo,
receiver |-> m.sender,
broker |-> target_broker]}
/\ BOpState' = [BOpState EXCEPT ![bo].sub_priv = BOpState[bo].sub_priv \cup
{<<m.sender, m.channel, target_broker>>},
![bo].track = UpdatedTrackSeqSet(BOpState[bo].track, m.sender, m.seq)]
/\ UNCHANGED <<EOpState, ExperState, BrokerState, EndpointState, ControllerState>>
BOpNegRspReqSubPriv(bo) ==
/\ BOpState[bo].state = "Idle"
/\ \E m \in msgs :
/\ m.type = "req_sub_priv"
/\ m.sender \in EOp
/\ m.receiver = bo
/\ UnseenSeq(BOpState[bo].track, m.sender, m.seq)
/\ \A b \in Broker: ~ <<bo, m.sender, b>> \in BOpAllowedEOp
/\ msgs' = msgs \cup
{[type |-> "rsp_sub_priv_f",
seq |-> m.seq,
sender |-> bo,
receiver |-> m.sender]}
/\ BOpState' = [BOpState EXCEPT ![bo].track = UpdatedTrackSeqSet(BOpState[bo].track, m.sender, m.seq)]
/\ UNCHANGED <<EOpState, ExperState, BrokerState, EndpointState, ControllerState>>
BOpPosRspReqPubPriv(bo) ==
/\ BOpState[bo].state = "Idle"
/\ \E m \in msgs :
/\ m.type = "req_pub_priv"
/\ m.sender \in Exper
/\ m.receiver = bo
/\ UnseenSeq(BOpState[bo].track, m.sender, m.seq)
/\ <<bo, m.sender>> \in BOpAllowedExper
/\ <<bo, m.broker>> \in BOpOwnedBroker
/\ msgs' = msgs \cup
{[type |-> "rsp_pub_priv",
seq |-> m.seq,
sender |-> bo,
receiver |-> m.sender]}
/\ BOpState' = [BOpState EXCEPT ![bo].pub_priv = BOpState[bo].pub_priv \cup {<<m.sender, m.broker>>},
![bo].track = UpdatedTrackSeqSet(BOpState[bo].track, m.sender, m.seq)]
/\ UNCHANGED <<EOpState, ExperState, BrokerState, EndpointState, ControllerState>>
BOpNegRspReqPubPriv(bo) ==
/\ BOpState[bo].state = "Idle"
/\ \E m \in msgs :
/\ m.type = "req_pub_priv"
/\ m.sender \in Exper
/\ m.receiver = bo
/\ UnseenSeq(BOpState[bo].track, m.sender, m.seq)
/\ \/ ~ <<bo, m.sender>> \in BOpAllowedExper
\/ ~ <<bo, m.broker>> \in BOpOwnedBroker
/\ msgs' = msgs \cup
{[type |-> "rsp_pub_priv_f",
seq |-> m.seq,
sender |-> bo,
receiver |-> m.sender]}
/\ BOpState' = [BOpState EXCEPT ![bo].track = UpdatedTrackSeqSet(BOpState[bo].track, m.sender, m.seq)]
/\ UNCHANGED <<EOpState, ExperState, BrokerState, EndpointState, ControllerState>>
(***************************************************************************)
(* BOp agent actions. *)
(***************************************************************************)
(***************************************************************************)
(* Request sub actions. *)
(***************************************************************************)
BOpProcessAuthSub(bo) ==
/\ BOpState[bo].state = "Idle"
/\ \E m \in msgs :
/\ m.type = "auth_sub_req"
/\ m.receiver = bo
/\ <<bo, m.sender>> \in BOpOwnedBroker
/\ UnseenSeq(BOpState[bo].track, m.sender, m.seq)
/\ \/ /\ ~<<m.owner, m.channel, m.sender>> \in BOpState[bo].sub_priv
/\ msgs' = msgs \cup {[type |-> "nack_auth_sub_req", seq |-> m.seq, sender |-> bo, receiver |-> m.sender]}
/\ BOpState' = [BOpState EXCEPT ![bo].track = UpdatedTrackSeqSet(BOpState[bo].track, m.sender, m.seq)]
/\ UNCHANGED <<EOpState, ExperState, BrokerState, EndpointState, ControllerState>>
\/ /\ <<m.owner, m.channel, m.sender>> \in BOpState[bo].sub_priv
/\ LET auth_m == [type |-> "req_auth_sub_agent",
seq |-> BOpState[bo].counter,
sender |-> bo,
receiver |-> m.owner,
origin |-> m.origin,
target |-> m.sender,
channel |-> m.channel]
IN /\ BOpState' = [BOpState EXCEPT ![bo].state = "AwaitAuthAgentSub",
![bo].counter = BOpState[bo].counter+1,
![bo].track = UpdatedTrackSeqSet(BOpState[bo].track, m.sender, m.seq),
![bo].received_msg = m,
![bo].sent_msg = auth_m]
/\ msgs' = msgs \cup {auth_m}
/\ UNCHANGED <<EOpState, ExperState, BrokerState, EndpointState, ControllerState>>
\* Note: potential reuse of rsp from EOp
BOpPosRspAuthSub(bo) ==
/\ BOpState[bo].state = "AwaitAuthAgentSub"
/\ \E m \in msgs :
/\ m.type = "rsp_auth_sub_agent"
/\ m.receiver = bo
/\ BOpState[bo].sent_msg.receiver = m.sender
/\ BOpState[bo].sent_msg.seq = m.seq
/\ msgs' = msgs \cup {[type |-> "ack_auth_sub_req",
seq |-> BOpState[bo].received_msg.seq,
sender |-> bo,
receiver |-> BOpState[bo].received_msg.sender]}
/\ BOpState' = [BOpState EXCEPT ![bo].state = "Idle",
![bo].received_msg = empty_msg,
![bo].sent_msg = empty_msg]
/\ UNCHANGED <<EOpState, ExperState, BrokerState, EndpointState, ControllerState>>
BOpNegRspAuthSub(bo) ==
/\ BOpState[bo].state = "AwaitAuthAgentSub"
/\ \E m \in msgs :
/\ m.type = "rsp_auth_sub_agent_f"
/\ m.receiver = bo
/\ BOpState[bo].sent_msg.receiver = m.sender
/\ BOpState[bo].sent_msg.seq = m.seq
/\ msgs' = msgs \cup {[type |-> "nack_auth_sub_req",
seq |-> BOpState[bo].received_msg.seq,
sender |-> bo,
receiver |-> BOpState[bo].received_msg.sender]}
/\ BOpState' = [BOpState EXCEPT ![bo].state = "Idle",
![bo].received_msg = empty_msg,
![bo].sent_msg = empty_msg]
/\ UNCHANGED <<EOpState, ExperState, BrokerState, EndpointState, ControllerState>>
(***************************************************************************)
(* Request pub actions. *)
(***************************************************************************)
BOpProcessAuthPub(bo) ==
/\ BOpState[bo].state = "Idle"
/\ \E m \in msgs :
/\ m.type = "auth_pub_req"
/\ m.receiver = bo
/\ <<bo, m.sender>> \in BOpOwnedBroker
/\ UnseenSeq(BOpState[bo].track, m.sender, m.seq)
/\ \/ /\ ~<<m.owner, m.sender>> \in BOpState[bo].pub_priv
/\ msgs' = msgs \cup {[type |-> "nack_auth_pub_req", seq |-> m.seq, sender |-> bo, receiver |-> m.sender]}
/\ BOpState' = [BOpState EXCEPT ![bo].track = UpdatedTrackSeqSet(BOpState[bo].track, m.sender, m.seq)]
/\ UNCHANGED <<EOpState, ExperState, BrokerState, EndpointState, ControllerState>>
\/ /\ <<m.owner, m.sender>> \in BOpState[bo].pub_priv
/\ LET auth_m == [type |-> "req_auth_pub_agent",
seq |-> BOpState[bo].counter,
sender |-> bo,
receiver |-> m.owner,
origin |-> m.origin,
target |-> m.sender,
channel |-> m.channel,
exp |-> m.exp,
sni |-> m.sni]
IN /\ BOpState' = [BOpState EXCEPT ![bo].state = "AwaitAuthAgentPub",
![bo].counter = BOpState[bo].counter+1,
![bo].track = UpdatedTrackSeqSet(BOpState[bo].track, m.sender, m.seq),
![bo].received_msg = m,
![bo].sent_msg = auth_m]
/\ msgs' = msgs \cup {auth_m}
/\ UNCHANGED <<EOpState, ExperState, BrokerState, EndpointState, ControllerState>>
\* Note: potential reuse of rsp from EOp
BOpPosRspAuthPub(bo) ==
/\ BOpState[bo].state = "AwaitAuthAgentPub"
/\ \E m \in msgs :
/\ m.type = "rsp_auth_pub_agent"
/\ m.receiver = bo
/\ BOpState[bo].sent_msg.receiver = m.sender
/\ BOpState[bo].sent_msg.seq = m.seq
/\ msgs' = msgs \cup {[type |-> "ack_auth_pub_req",
seq |-> BOpState[bo].received_msg.seq,
sender |-> bo,
receiver |-> BOpState[bo].received_msg.sender]}
/\ BOpState' = [BOpState EXCEPT ![bo].state = "Idle",
![bo].received_msg = empty_msg,
![bo].sent_msg = empty_msg]
/\ UNCHANGED <<EOpState, ExperState, BrokerState, EndpointState, ControllerState>>
\* Note: potential reuse of rsp from EOp
BOpNegRspAuthPub(bo) ==
/\ BOpState[bo].state = "AwaitAuthAgentPub"
/\ \E m \in msgs :
/\ m.type = "rsp_auth_pub_agent_f"
/\ m.receiver = bo
/\ BOpState[bo].sent_msg.receiver = m.sender
/\ BOpState[bo].sent_msg.seq = m.seq
/\ msgs' = msgs \cup {[type |-> "nack_auth_pub_req",
seq |-> BOpState[bo].received_msg.seq,
sender |-> bo,
receiver |-> BOpState[bo].received_msg.sender]}
/\ BOpState' = [BOpState EXCEPT ![bo].state = "Idle",
![bo].received_msg = empty_msg,
![bo].sent_msg = empty_msg]
/\ UNCHANGED <<EOpState, ExperState, BrokerState, EndpointState, ControllerState>>
(***************************************************************************)
(* Broker actions. *)
(***************************************************************************)
(***************************************************************************)
(* Request sub actions. *)
(***************************************************************************)
BrokerProcessReqSub(b) ==
/\ BrokerState[b].state = "Idle"
/\ \E m \in msgs :
/\ m.type = "req_sub"
/\ m.receiver = b
/\ UnseenSeq(BrokerState[b].track, m.sender, m.seq)
/\ LET auth_m == [type |-> "auth_sub_req",
seq |-> BrokerState[b].counter,
sender |-> b,
receiver |-> (CHOOSE tup \in BOpOwnedBroker: tup[2] = b)[1],
origin |-> m.sender,
owner |-> m.owner,
channel |-> m.channel]
IN /\ BrokerState' = [BrokerState EXCEPT ![b].state = "AwaitSubAuth",
![b].counter = BrokerState[b].counter+1,
![b].track = UpdatedTrackSeqSet(BrokerState[b].track, m.sender, m.seq),
![b].received_msg = m,
![b].sent_msg = auth_m]
/\ msgs' = msgs \cup {auth_m}
/\ UNCHANGED <<EOpState, ExperState, BOpState, EndpointState, ControllerState>>
\* Note: potential reuse of rsp from BOp
BrokerPosRspReqSub(b) ==
/\ BrokerState[b].state = "AwaitSubAuth"
/\ \E m \in msgs :
/\ m.type = "ack_auth_sub_req"
/\ m.receiver = b
/\ BrokerState[b].sent_msg.receiver = m.sender
/\ BrokerState[b].sent_msg.seq = m.seq
/\ msgs' = msgs \cup {[type |-> "rsp_sub",
seq |-> BrokerState[b].received_msg.seq,
sender |-> b,
receiver |-> BrokerState[b].received_msg.sender]}
/\ BrokerState' = [BrokerState EXCEPT ![b].state = "Idle",
![b].received_msg = empty_msg,
![b].sent_msg = empty_msg,
![b].sub_info =
BrokerState[b].sub_info \cup
{<<BrokerState[b].received_msg.sender,
BrokerState[b].received_msg.channel>>}]
/\ UNCHANGED <<EOpState, ExperState, BOpState, EndpointState, ControllerState>>
BrokerNegRspReqSub(b) ==
/\ BrokerState[b].state = "AwaitSubAuth"
/\ \E m \in msgs :
/\ m.type = "nack_auth_sub_req"
/\ m.receiver = b
/\ BrokerState[b].sent_msg.receiver = m.sender
/\ BrokerState[b].sent_msg.seq = m.seq
/\ msgs' = msgs \cup {[type |-> "rsp_sub_f",
seq |-> BrokerState[b].received_msg.seq,
sender |-> b,
receiver |-> BrokerState[b].received_msg.sender]}
/\ BrokerState' = [BrokerState EXCEPT ![b].state = "Idle",
![b].received_msg = empty_msg,
![b].sent_msg = empty_msg]
/\ UNCHANGED <<EOpState, ExperState, BOpState, EndpointState, ControllerState>>
(***************************************************************************)
(* Request pub actions. *)
(***************************************************************************)
BrokerProcessReqPub(b) ==
/\ BrokerState[b].state = "Idle"
/\ \E m \in msgs :
/\ m.type = "req_pub"
/\ m.receiver = b
/\ UnseenSeq(BrokerState[b].track, m.sender, m.seq)
/\ LET auth_m == [type |-> "auth_pub_req",
seq |-> BrokerState[b].counter,
sender |-> b,
receiver |-> (CHOOSE tup \in BOpOwnedBroker: tup[2] = b)[1],
origin |-> m.sender,
owner |-> m.owner,
exp |-> m.exp,
channel |-> m.channel,
sni |-> m.sni]
IN /\ BrokerState' = [BrokerState EXCEPT ![b].state = "AwaitPubAuth",
![b].counter = BrokerState[b].counter+1,
![b].track = UpdatedTrackSeqSet(BrokerState[b].track, m.sender, m.seq),
![b].received_msg = m,
![b].sent_msg = auth_m]
/\ msgs' = msgs \cup {auth_m}
/\ UNCHANGED <<EOpState, ExperState, BOpState, EndpointState, ControllerState>>
\* Note: potential reuse of rsp from BOp
BrokerPosRspReqPub(b) ==
/\ BrokerState[b].state = "AwaitPubAuth"
/\ \E m \in msgs :
/\ m.type = "ack_auth_pub_req"
/\ m.receiver = b
/\ BrokerState[b].sent_msg.receiver = m.sender
/\ BrokerState[b].sent_msg.seq = m.seq
/\ msgs' = msgs \cup {[type |-> "rsp_pub",
seq |-> BrokerState[b].received_msg.seq,
sender |-> b,
receiver |-> BrokerState[b].received_msg.sender]}
/\ BrokerState' = [BrokerState EXCEPT ![b].state = "Idle",
![b].received_msg = empty_msg,
![b].sent_msg = empty_msg,
![b].pub_info =
BrokerState[b].pub_info \cup
{<< BrokerState[b].received_msg.sender,
BrokerState[b].received_msg.exp,
BrokerState[b].received_msg.channel,
BrokerState[b].received_msg.sni >>}]
/\ UNCHANGED <<EOpState, ExperState, BOpState, EndpointState, ControllerState>>
BrokerNegRspReqPub(b) ==
/\ BrokerState[b].state = "AwaitPubAuth"
/\ \E m \in msgs :
/\ m.type = "nack_auth_pub_req"
/\ m.receiver = b
/\ BrokerState[b].sent_msg.receiver = m.sender
/\ BrokerState[b].sent_msg.seq = m.seq
/\ msgs' = msgs \cup {[type |-> "rsp_pub_f",
seq |-> BrokerState[b].received_msg.seq,
sender |-> b,
receiver |-> BrokerState[b].received_msg.sender]}
/\ BrokerState' = [BrokerState EXCEPT ![b].state = "Idle",
![b].received_msg = empty_msg,
![b].sent_msg = empty_msg]
/\ UNCHANGED <<EOpState, ExperState, BOpState, EndpointState, ControllerState>>
(***************************************************************************)
(* Notify and run exp endpoint auth actions. *)
(***************************************************************************)
BrokerNotifyExp(b) ==
/\ BrokerState[b].state = "Idle"
/\ \E sub_info \in BrokerState[b].sub_info :
/\ \E pub_info \in BrokerState[b].pub_info :
/\ sub_info[2] = pub_info[3]
/\ ~ <<sub_info[1], pub_info[1], pub_info[2], pub_info[3], pub_info[4]>> \in BrokerState[b].notified
/\ msgs' = msgs \cup {[type |-> "notify_exp",
seq |-> BrokerState[b].counter,
sender |-> b,
receiver |-> sub_info[1],
target |-> pub_info[1],
exp |-> pub_info[2],
channel |-> pub_info[3],
sni |-> pub_info[4]]}
/\ BrokerState' = [BrokerState EXCEPT ![b].notified =
BrokerState[b].notified \cup
{<<sub_info[1], pub_info[1], pub_info[2], pub_info[3], pub_info[4]>>},
![b].counter = BrokerState[b].counter+1]
/\ UNCHANGED <<EOpState, ExperState, BOpState, EndpointState, ControllerState>>
(***************************************************************************)
(* EOp principal actions. *)
(***************************************************************************)
EOpReqSubPriv(eo) ==
/\ EOpState[eo].state = "Idle"
/\ ~EOpState[eo].sub_targets = {}
/\ LET target_tup == (CHOOSE cand_tup \in EOpState[eo].sub_targets: TRUE)
req_m == [type |-> "req_sub_priv",
seq |-> EOpState[eo].counter,
sender |-> eo,
receiver |-> target_tup[1],
channel |-> target_tup[2]]
IN /\ EOpState' = [EOpState EXCEPT ![eo].sub_targets = EOpState[eo].sub_targets \ {target_tup},
![eo].counter = EOpState[eo].counter+1,
![eo].state = "AwaitSubPrivilege",
![eo].sent_msg = req_m]
/\ msgs' = msgs \cup {req_m}
/\ UNCHANGED <<BOpState, ExperState, BrokerState, EndpointState, ControllerState>>
EOpPosRspReqSubPriv(eo) ==
/\ EOpState[eo].state = "AwaitSubPrivilege"
/\ \E m \in msgs :
/\ m.type = "rsp_sub_priv"
/\ m.receiver = eo
/\ EOpState[eo].sent_msg.receiver = m.sender
/\ EOpState[eo].sent_msg.seq = m.seq
/\ EOpState' = [EOpState EXCEPT ![eo].state = "Idle",
![eo].sent_msg = empty_msg,
![eo].sub_priv =
EOpState[eo].sub_priv \cup
{<<m.sender, EOpState[eo].sent_msg.channel, m.broker>>},
![eo].unused_sub_priv =
EOpState[eo].unused_sub_priv \cup
{<<m.sender, EOpState[eo].sent_msg.channel, m.broker>>}]
/\ UNCHANGED <<BOpState, ExperState, BrokerState, EndpointState, ControllerState, msgs>>
EOpNegRspReqSubPriv(eo) ==
/\ EOpState[eo].state = "AwaitSubPrivilege"
/\ \E m \in msgs :
/\ m.type = "rsp_sub_priv_f"
/\ m.receiver = eo
/\ EOpState[eo].sent_msg.receiver = m.sender
/\ EOpState[eo].sent_msg.seq = m.seq
/\ EOpState' = [EOpState EXCEPT ![eo].state = "Idle",
![eo].sent_msg = empty_msg]
/\ UNCHANGED <<BOpState, ExperState, BrokerState, EndpointState, ControllerState, msgs>>
\* consider remove broker tup non-determinism
EOpPosRspReqExpPriv(eo) ==
/\ EOpState[eo].state = "Idle"
/\ \E m \in msgs :
/\ m.type = "req_exp_priv"
/\ m.sender \in Exper
/\ m.receiver = eo
/\ UnseenSeq(EOpState[eo].track, m.sender, m.seq)
/\ <<eo, m.sender>> \in EOpAllowedExper
/\ <<eo, m.exp>> \in EOpAllowedExp
/\ ~ EOpState[eo].sub_priv = {} \* reply to exp_priv only after having assigned broker
/\ LET broker_tup == (CHOOSE tup \in EOpState[eo].sub_priv: TRUE)
exp_priv_tup == (CHOOSE tup \in EOpAllowedExp: tup[1] = eo)
IN /\ msgs' = msgs \cup
{[type |-> "rsp_exp_priv",
seq |-> m.seq,
sender |-> eo,
receiver |-> m.sender,
broker_owner |-> broker_tup[1],
broker |-> broker_tup[3],
channel |-> broker_tup[2],
exp_priv |-> exp_priv_tup[2]]} \* may be a set instead
/\ EOpState' = [EOpState EXCEPT ![eo].exp_priv = EOpState[eo].exp_priv \cup
{<<m.sender,
broker_tup[2],
broker_tup[3],
exp_priv_tup[2]>>},
![eo].track = UpdatedTrackSeqSet(EOpState[eo].track, m.sender, m.seq)]
/\ UNCHANGED <<BOpState, ExperState, BrokerState, EndpointState, ControllerState>>
EOpNegRspReqExpPriv(eo) ==
/\ EOpState[eo].state = "Idle"
/\ \E m \in msgs :
/\ m.type = "req_exp_priv"
/\ m.sender \in Exper
/\ m.receiver = eo
/\ UnseenSeq(EOpState[eo].track, m.sender, m.seq)
/\ \/ ~ <<eo, m.sender>> \in EOpAllowedExper
\/ ~ <<eo, m.exp>> \in EOpAllowedExp
/\ msgs' = msgs \cup
{[type |-> "rsp_exp_priv_f",
seq |-> m.seq,
sender |-> eo,
receiver |-> m.sender]}
/\ EOpState' = [EOpState EXCEPT ![eo].track = UpdatedTrackSeqSet(EOpState[eo].track, m.sender, m.seq)]
/\ UNCHANGED <<BOpState, ExperState, BrokerState, EndpointState, ControllerState>>
(***************************************************************************)
(* EOp agent actions. *)
(***************************************************************************)
(***************************************************************************)
(* Request sub actions. *)
(***************************************************************************)
\* triggered only when no sub_targets left
EOpCmdSub(eo) ==
/\ EOpState[eo].state = "Idle"
/\ EOpState[eo].sub_targets = {}
/\ \E sub_priv \in EOpState[eo].unused_sub_priv :
/\ LET target_agent == (CHOOSE tup \in EOpOwnedEndpoint: tup[1] = eo)[2]
cmd_m == [type |-> "cmd_sub",
seq |-> EOpState[eo].counter,
sender |-> eo,
receiver |-> target_agent,
broker |-> sub_priv[3],
channel |-> sub_priv[2]]
IN /\ EOpState' = [EOpState EXCEPT ![eo].state = "AwaitSub",
![eo].counter = EOpState[eo].counter+1,
![eo].sent_msg = cmd_m,
![eo].sub_cmd =
EOpState[eo].sub_cmd \cup
{<<cmd_m.receiver, cmd_m.channel, cmd_m.broker>>},
![eo].unused_sub_priv = EOpState[eo].unused_sub_priv \ {sub_priv}]
/\ msgs' = msgs \cup {cmd_m}
/\ UNCHANGED <<BOpState, ExperState, BrokerState, EndpointState, ControllerState>>
EOpPosRspCmdSub(eo) ==
/\ EOpState[eo].state = "AwaitSub"
/\ \E m \in msgs :
/\ m.type = "ack_cmd_sub"
/\ m.receiver = eo
/\ EOpState[eo].sent_msg.receiver = m.sender
/\ EOpState[eo].sent_msg.seq = m.seq
/\ EOpState' = [EOpState EXCEPT ![eo].state = "Idle",
![eo].sent_msg = empty_msg]
/\ UNCHANGED <<BOpState, ExperState, BrokerState, EndpointState, ControllerState, msgs>>
EOpNegRspCmdSub(eo) ==
/\ EOpState[eo].state = "AwaitSub"
/\ \E m \in msgs :
/\ m.type = "nack_cmd_sub"
/\ m.receiver = eo
/\ EOpState[eo].sent_msg.receiver = m.sender
/\ EOpState[eo].sent_msg.seq = m.seq
/\ EOpState' = [EOpState EXCEPT ![eo].state = "Idle",
![eo].sent_msg = empty_msg,
![eo].sub_cmd =
EOpState[eo].sub_cmd \
{<<EOpState[eo].sent_msg.receiver,
EOpState[eo].sent_msg.channel,
EOpState[eo].sent_msg.broker>>}]
/\ UNCHANGED <<BOpState, ExperState, BrokerState, EndpointState, ControllerState, msgs>>
EOpProcessReqAuthSubAgent(eo) ==
/\ EOpState[eo].state = "AwaitSub"
/\ \E m \in msgs :
/\ m.type = "req_auth_sub_agent"
/\ m.receiver = eo
/\ UnseenSeq(EOpState[eo].track, m.sender, m.seq)
/\ EOpState' = [EOpState EXCEPT ![eo].track = UpdatedTrackSeqSet(EOpState[eo].track, m.sender, m.seq)]
/\ LET check1 == \E sub_priv \in EOpState[eo].sub_priv :
/\ sub_priv[1] = m.sender
/\ sub_priv[2] = m.channel
/\ sub_priv[3] = m.target
check2 == \E sub_cmd \in EOpState[eo].sub_cmd :
/\ sub_cmd[1] = m.origin
/\ sub_cmd[2] = m.channel
/\ sub_cmd[3] = m.target
pos_m == [type |-> "rsp_auth_sub_agent",
seq |-> m.seq,
sender |-> eo,
receiver |-> m.sender]
neg_m == [type |-> "rsp_auth_sub_agent_f",
seq |-> m.seq,
sender |-> eo,
receiver |-> m.sender]
IN \/ /\ check1
/\ check2
/\ msgs' = msgs \cup {pos_m}
/\ UNCHANGED <<BOpState, ExperState, BrokerState, EndpointState, ControllerState>>
\/ /\ ~check1
/\ msgs' = msgs \cup {neg_m}
/\ UNCHANGED <<BOpState, ExperState, BrokerState, EndpointState, ControllerState>>
\/ /\ ~check2
/\ msgs' = msgs \cup {neg_m}
/\ UNCHANGED <<BOpState, ExperState, BrokerState, EndpointState, ControllerState>>
(***************************************************************************)
(* Notify and run exp endpoint auth actions. *)
(***************************************************************************)
EOpProcessAuthNotify(eo) ==
/\ EOpState[eo].state = "Idle"
/\ \E m \in msgs :
/\ m.type = "auth_notify"
/\ m.receiver = eo
/\ <<eo, m.sender>> \in EOpOwnedEndpoint
/\ UnseenSeq(EOpState[eo].track, m.sender, m.seq)
/\ EOpState' = [EOpState EXCEPT ![eo].track = UpdatedTrackSeqSet(EOpState[eo].track, m.sender, m.seq)]
/\ LET check == \E sub_cmd \in EOpState[eo].sub_cmd :
/\ sub_cmd[1] = m.sender
/\ sub_cmd[2] = m.channel
/\ sub_cmd[3] = m.notifier
pos_m == [type |-> "ack_auth_notify",
seq |-> m.seq,
sender |-> eo,
receiver |-> m.sender]
neg_m == [type |-> "nack_auth_notify",
seq |-> m.seq,
sender |-> eo,
receiver |-> m.sender]
IN \/ /\ check
/\ msgs' = msgs \cup {pos_m}
/\ UNCHANGED <<BOpState, ExperState, BrokerState, EndpointState, ControllerState>>
\/ /\ ~check
/\ msgs' = msgs \cup {neg_m}
/\ UNCHANGED <<BOpState, ExperState, BrokerState, EndpointState, ControllerState>>
EOpProcessAuthExp(eo) ==
/\ EOpState[eo].state = "Idle"
/\ \E m \in msgs :
/\ m.type = "auth_exp"
/\ m.receiver = eo
/\ UnseenSeq(EOpState[eo].track, m.sender, m.seq)
/\ LET check1 == \E sub_cmd \in EOpState[eo].sub_cmd :
/\ sub_cmd[1] = m.sender
/\ sub_cmd[2] = m.channel
/\ sub_cmd[3] = m.notifier
check2 == \E exp_priv \in EOpState[eo].exp_priv :
/\ exp_priv[1] = m.owner
/\ exp_priv[2] = m.channel
/\ exp_priv[3] = m.notifier
further_auth_m == [type |-> "req_auth_exp_agent",
seq |-> EOpState[eo].counter,
sender |-> eo,
receiver |-> m.owner,
origin |-> m.origin,
exp |-> m.exp,
notifier |-> m.notifier,
channel |-> m.channel]
neg_m == [type |-> "nack_auth_exp",
seq |-> m.seq,
sender |-> eo,
receiver |-> m.sender]
IN \/ /\ check1
/\ check2
/\ EOpState' = [EOpState EXCEPT ![eo].state = "AwaitAuthAgentExp",
![eo].counter = EOpState[eo].counter+1,
![eo].track = UpdatedTrackSeqSet(EOpState[eo].track, m.sender, m.seq),
![eo].sent_msg = further_auth_m,
![eo].received_msg = m]
/\ msgs' = msgs \cup {further_auth_m}
/\ UNCHANGED <<BOpState, ExperState, BrokerState, EndpointState, ControllerState>>
\/ /\ ~check1
/\ msgs' = msgs \cup {neg_m}
/\ EOpState' = [EOpState EXCEPT ![eo].track = UpdatedTrackSeqSet(EOpState[eo].track, m.sender, m.seq)]
/\ UNCHANGED <<BOpState, ExperState, BrokerState, EndpointState, ControllerState>>
\/ /\ ~check2
/\ msgs' = msgs \cup {neg_m}
/\ EOpState' = [EOpState EXCEPT ![eo].track = UpdatedTrackSeqSet(EOpState[eo].track, m.sender, m.seq)]
/\ UNCHANGED <<BOpState, ExperState, BrokerState, EndpointState, ControllerState>>
EOpPosRspAuthExp(eo) ==
/\ EOpState[eo].state = "AwaitAuthAgentExp"
/\ \E m \in msgs :
/\ m.type = "rsp_auth_exp_agent"
/\ m.receiver = eo
/\ EOpState[eo].sent_msg.receiver = m.sender
/\ EOpState[eo].sent_msg.seq = m.seq
/\ EOpState' = [EOpState EXCEPT ![eo].state = "Idle",
![eo].sent_msg = empty_msg,
![eo].received_msg = empty_msg]
/\ LET pos_m == [type |-> "ack_auth_exp",
seq |-> EOpState[eo].received_msg.seq,
sender |-> eo,
receiver |-> EOpState[eo].received_msg.sender,
exp_priv |-> (CHOOSE tup \in EOpState[eo].exp_priv:
/\ tup[1] = m.sender
/\ tup[2] = EOpState[eo].received_msg.channel
/\ tup[3] = EOpState[eo].received_msg.notifier)[4]]
IN msgs' = msgs \cup {pos_m}
/\ UNCHANGED <<BOpState, ExperState, BrokerState, EndpointState, ControllerState>>
EOpNegRspAuthExp(eo) ==
/\ EOpState[eo].state = "AwaitAuthAgentExp"
/\ \E m \in msgs :
/\ m.type = "rsp_auth_exp_agent_f"
/\ m.receiver = eo
/\ EOpState[eo].sent_msg.receiver = m.sender
/\ EOpState[eo].sent_msg.seq = m.seq
/\ EOpState' = [EOpState EXCEPT ![eo].state = "Idle",
![eo].sent_msg = empty_msg,
![eo].received_msg = empty_msg]
/\ LET neg_m == [type |-> "nack_auth_exp",
seq |-> EOpState[eo].received_msg.seq,
sender |-> eo,
receiver |-> EOpState[eo].received_msg.sender]
IN msgs' = msgs \cup {neg_m}
/\ UNCHANGED <<BOpState, ExperState, BrokerState, EndpointState, ControllerState>>
(***************************************************************************)
(* Notify and run exp controller auth actions. *)
(***************************************************************************)
EOpProcessReqAuthHelpAgent(eo) ==
/\ EOpState[eo].state = "Idle"
/\ \E m \in msgs :
/\ m.type = "req_auth_help_agent"
/\ m.receiver = eo
/\ UnseenSeq(EOpState[eo].track, m.sender, m.seq)
/\ EOpState' = [EOpState EXCEPT ![eo].track = UpdatedTrackSeqSet(EOpState[eo].track, m.sender, m.seq)]