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ibos.preds.maude
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load ibos.maude
mod IBOS-PRED-INIT is
pr KERNEL .
op init : Sys -> [Bool] .
eq [init]:
init(
{ < 0 : nic | in(mtLL),out(mtLL) >
< id(1) : kernel |
msgPolicy(
policy(id(3), id(4), MSG-FETCH-URL),
policy(id(3), id(4), MSG-FETCH-URL-ABORT),
policy(id(3), id(6), MSG-DOM-COOKIE-SET),
policy(id(3), id(6), MSG-DOM-COOKIE-GET),
policy(id(3), id(11), MSG-UI-MSG),
policy(id(3), id(14), MSG-WRITE-FILE),
policy(id(3), id(14), MSG-READ-FILE),
policy(id(4), id(3), MSG-RETURN-URL),
policy(id(4), id(3), MSG-RETURN-URL-METADATA),
policy(id(4), id(6), MSG-COOKIE-SET),
policy(id(4), id(6), MSG-COOKIE-GET),
policy(id(6), id(3), MSG-DOM-COOKIE-GET-RETURN),
policy(id(6), id(4), MSG-COOKIE-GET-RETURN),
policy(id(11), id(3), MSG-NEW-URL),
policy(id(11), id(3), MSG-SWITCH-TAB),
policy(id(11), id(3), MSG-WEBAPP-MSG),
policy(id(14), id(3), MSG-READ-FILE-RETURN),
policy(id(14), id(11), MSG-DOWNLOAD-INFO)),
nextNetworkProc(256),
handledCurrently(none),
weblabels(mtWPIS),
networklabels(mtNPIS),
displayedTopBar(about-blank) >
< id(2) : proc | nextWAN(1024) > < id(2) : pipe | fromKernel(mt),toKernel(mt) >
< id(5) : proc | none > < id(5) : pipe | fromKernel(mt),toKernel(mt) >
< id(6) : proc | none > < id(6) : pipe | fromKernel(mt),toKernel(mt) >
< id(7) : proc | none > < id(7) : pipe | fromKernel(mt), toKernel(mt) >
< id(8) : proc | none > < id(8) : pipe | fromKernel(mt),toKernel(mt) >
< id(9) : proc | none > < id(9) : pipe | fromKernel(mt),toKernel(mt) >
< id(10) : proc | none > < id(10) : pipe | fromKernel(mt),toKernel(mt) >
< id(11) : proc | none > < id(11) : pipe | fromKernel(mt),toKernel(mt) >
< id(12) : proc | none > < id(12) : pipe | fromKernel(mt),toKernel(mt) >
< id(13) : proc | none > < id(13) : pipe | fromKernel(mt),toKernel(mt) >
< id(15) : proc | activeWebapp(id(0)),displayedContent(about-blank) >
})
= true .
op init : -> Sys .
eq init
= { < 0 : nic | in(mtLL),out(mtLL) >
< id(1) : kernel |
msgPolicy(
policy(id(3), id(4), MSG-FETCH-URL),
policy(id(3), id(4), MSG-FETCH-URL-ABORT),
policy(id(3), id(6), MSG-DOM-COOKIE-SET),
policy(id(3), id(6), MSG-DOM-COOKIE-GET),
policy(id(3), id(11), MSG-UI-MSG),
policy(id(3), id(14), MSG-WRITE-FILE),
policy(id(3), id(14), MSG-READ-FILE),
policy(id(4), id(3), MSG-RETURN-URL),
policy(id(4), id(3), MSG-RETURN-URL-METADATA),
policy(id(4), id(6), MSG-COOKIE-SET),
policy(id(4), id(6), MSG-COOKIE-GET),
policy(id(6), id(3), MSG-DOM-COOKIE-GET-RETURN),
policy(id(6), id(4), MSG-COOKIE-GET-RETURN),
policy(id(11), id(3), MSG-NEW-URL),
policy(id(11), id(3), MSG-SWITCH-TAB),
policy(id(11), id(3), MSG-WEBAPP-MSG),
policy(id(14), id(3), MSG-READ-FILE-RETURN),
policy(id(14), id(11), MSG-DOWNLOAD-INFO)),
nextNetworkProc(256),
handledCurrently(none),
weblabels(mtWPIS),
networklabels(mtNPIS),
displayedTopBar(about-blank) >
< id(2) : proc | nextWAN(1024) > < id(2) : pipe | fromKernel(mt),toKernel(mt) >
< id(5) : proc | none > < id(5) : pipe | fromKernel(mt),toKernel(mt) >
< id(6) : proc | none > < id(6) : pipe | fromKernel(mt),toKernel(mt) >
< id(7) : proc | none > < id(7) : pipe | fromKernel(mt), toKernel(mt) >
< id(8) : proc | none > < id(8) : pipe | fromKernel(mt),toKernel(mt) >
< id(9) : proc | none > < id(9) : pipe | fromKernel(mt),toKernel(mt) >
< id(10) : proc | none > < id(10) : pipe | fromKernel(mt),toKernel(mt) >
< id(11) : proc | none > < id(11) : pipe | fromKernel(mt),toKernel(mt) >
< id(12) : proc | none > < id(12) : pipe | fromKernel(mt),toKernel(mt) >
< id(13) : proc | none > < id(13) : pipe | fromKernel(mt),toKernel(mt) >
< id(15) : proc | activeWebapp(id(0)),displayedContent(about-blank) > } .
endm
mod IBOS-PRED-UNIQUE-KERNEL is
pr KERNEL .
var Att : AttributeSet .
vars Att1 Att2 : AttributeSet .
var C : Cid .
var Cnf : Configuration .
vars P P1 P2 : ProcId .
op unique-kernel : Sys -> [Bool] .
ceq [unique-kernel-0] :
unique-kernel( { Cnf } )
= false
if no-kernel(Cnf) .
eq [unique-kernel-1] :
unique-kernel( { < P : kernel | Att > Cnf } )
= no-kernel(Cnf) .
eq [unique-kernel-2] :
unique-kernel( { < P1 : kernel | Att1 > < P2 : kernel | Att2 > Cnf } )
= false .
op no-kernel : Configuration -> Bool .
eq no-kernel(none)
= true .
eq no-kernel(<> Cnf)
= no-kernel(Cnf) .
eq no-kernel( < P : C | Att > Cnf )
= not(C ~ kernel) and no-kernel(Cnf) .
endm
**** The policy does not change
mod IBOS-PRED-IMMUTABLE-POLICY is
pr KERNEL .
op immutable-policy : Sys PolicySet -> [Bool] .
op init-policy : -> PolicySet .
eq init-policy
= ( policy(id(3), id(4), MSG-FETCH-URL),
policy(id(3), id(4), MSG-FETCH-URL-ABORT),
policy(id(3), id(6), MSG-DOM-COOKIE-SET),
policy(id(3), id(6), MSG-DOM-COOKIE-GET),
policy(id(3), id(11), MSG-UI-MSG),
policy(id(3), id(14), MSG-WRITE-FILE),
policy(id(3), id(14), MSG-READ-FILE),
policy(id(4), id(3), MSG-RETURN-URL),
policy(id(4), id(3), MSG-RETURN-URL-METADATA),
policy(id(4), id(6), MSG-COOKIE-SET),
policy(id(4), id(6), MSG-COOKIE-GET),
policy(id(6), id(3), MSG-DOM-COOKIE-GET-RETURN),
policy(id(6), id(4), MSG-COOKIE-GET-RETURN),
policy(id(11), id(3), MSG-NEW-URL),
policy(id(11), id(3), MSG-SWITCH-TAB),
policy(id(11), id(3), MSG-WEBAPP-MSG),
policy(id(14), id(3), MSG-READ-FILE-RETURN),
policy(id(14), id(11), MSG-DOWNLOAD-INFO)) .
var Att : AttributeSet .
var Cnf : Configuration .
var PS : PolicySet .
eq [immutable-policy]:
immutable-policy({ < id(1) : kernel | msgPolicy(PS), Att > Cnf }, PS)
= true .
endm
*** IBOS predicates
mod IBOS-PREDS is
pr IBOS-PRED-INIT .
pr IBOS-PRED-UNIQUE-KERNEL .
pr IBOS-PRED-IMMUTABLE-POLICY .
endm