- Made a start with the new version.
This commit is contained in:
ccremers
parent
bb78c71c90
commit
b2838ed1e4
@ -155,6 +155,44 @@ mgu_iterate (const Termlist tl)
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return iterate ();
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}
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//! After a role instance, or an extension of a run, we might need to add some goals
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/**
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* From old to new. Sets the new length to new.
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*@returns The number of goals added (for destructions)
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*/
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int
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add_read_goals (const int run, int old, int new)
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{
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int count;
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int i;
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Roledef rd;
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sys->runs[run].length = new;
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i = old;
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rd = roledef_shift (sys->runs[run], i);
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while (i < new)
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{
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if (rd->type == READ)
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{
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goal_add (rd->message, run, i);
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}
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rd = rd->next;
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i++;
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}
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return count;
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}
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//! Remove n goals
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void
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remove_read_goals (int n)
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{
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while (n>0)
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{
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goal_remove_last ();
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n--;
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}
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}
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//! Determine the run that follows from a substitution.
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/**
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* After an Arachne unification, stuff might go wrong w.r.t. nonce instantiation.
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@ -247,62 +285,13 @@ iterate_role_sends (int (*func) ())
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return 1;
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}
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//! Generate a new intruder goal
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int
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create_intruder_goal (Term t)
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{
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int run;
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Roledef rd;
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roleInstance (sys, INTRUDER, NULL, NULL, NULL);
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run = sys->maxruns - 1;
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rd = sys->runs[run].start;
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sys->runs[run].length = 1;
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rd->message = termDuplicate (t);
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#ifdef DEBUG
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if (DEBUGL (3))
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{
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explanation = "Adding intruder goal for message ";
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e_term1 = t;
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e_run = run;
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}
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#endif
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return run;
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}
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//! Generates a new intruder goal, iterates
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/**
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* Sloppy, does not unify term but hardcodes it into the stuff.
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*/
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int
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add_intruder_goal_iterate (Goal goal)
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{
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int flag;
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int run;
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run = create_intruder_goal (goal.rd->message);
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if (binding_add (run, 0, goal.run, goal.index, goal.rd->message))
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{
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flag = iterate ();
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}
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else
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{
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indentPrint ();
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eprintf ("Aborted adding intruder goal because of cycle.\n");
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flag = 1;
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}
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binding_remove_last ();
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roleInstanceDestroy (sys); // destroy the created run
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return flag;
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}
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//! Try to bind a specific existing run to a goal.
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/**
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* The key goals are bound to the goal.
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*@param subterm determines whether it is a subterm unification or not.
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*/
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int
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bind_existing_to_goal (const Goal goal, const int index, const int run,
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bind_existing_to_goal (const Binding b, const int index, const int run,
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const int subterm)
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{
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Roledef rd;
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@ -1146,3 +1135,13 @@ arachne ()
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cl = cl->next;
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}
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}
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/**
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* Done: add_read_goals, remove_read_goals.
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*
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* Now we must make the new algorithm.
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* At role instance (of e.g. claim), fix add_read_goals.
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*
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* Iterate on roles. Create new roles for intruder (encrypt RRS, decrypt RRS, and M_0 S)
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* Check for bindings_c_minimal.
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*/
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328
src/binding.c
328
src/binding.c
@ -10,26 +10,9 @@
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#include "debug.h"
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#include "term.h"
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/*
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* Idea is the ev_from *has to* precede the ev_to
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*/
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struct binding
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{
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int run_from;
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int ev_from;
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int run_to;
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int ev_to;
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int *graph;
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int nodes;
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Term term;
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};
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typedef struct binding *Binding;
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static System sys;
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static int* graph;
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static int nodes;
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/*
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*
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@ -39,17 +22,19 @@ static System sys;
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//! Create mem for binding
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Binding
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binding_create (int run_from, int ev_from, int run_to, int ev_to, Term term)
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binding_create (Term term, int run_to, int ev_to)
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{
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Binding b;
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b = memAlloc (sizeof (struct binding));
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b->run_from = run_from;
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b->ev_from = ev_from;
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b->done = 0;
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b->child = 0;
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b->run_from = -1;
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b->ev_from = -1;
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b->run_to = run_to;
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b->ev_to = ev_to;
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b->graph = NULL;
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b->nodes = 0;
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graph = NULL;
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nodes = 0;
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b->term = term;
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return b;
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}
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@ -58,9 +43,9 @@ binding_create (int run_from, int ev_from, int run_to, int ev_to, Term term)
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void
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binding_destroy (Binding b)
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{
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if (b->graph != NULL)
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if (b->done)
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{
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memFree (b->graph, (b->nodes * b->nodes) * sizeof (int));
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goal_unbind ();
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}
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memFree (b, sizeof (struct binding));
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}
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@ -92,6 +77,62 @@ bindingDone ()
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list_destroy (sys->bindings);
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}
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//! Compute unclosed graph
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void goal_graph_create ()
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{
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int run, ev;
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List bl;
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goal_graph_destroy ();
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// Setup graph
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nodes = node_count ();
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graph = memAlloc ((nodes * nodes) * sizeof (int));
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graph_fill (graph, nodes, 0);
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// Setup run order
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run = 0;
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while (run < sys->maxruns)
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{
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ev = 1;
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//!@todo This now reference to step, but we intend "length" as in Arachne.
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while (ev < sys->runs[run].step)
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{
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graph[graph_nodes (nodes, run, ev - 1, run, ev)] = 1;
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ev++;
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}
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run++;
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}
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// Setup bindings order
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bl = sys->bindings;
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while (bl != NULL)
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{
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Binding b;
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b = (Binding) bl->data;
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#ifdef DEBUG
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if (graph_nodes (nodes, b->run_from, b->ev_from, b->run_to, b->ev_to) >=
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(nodes * nodes))
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error ("Node out of scope for %i,%i -> %i,%i.\n", b->run_from,
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b->ev_from, b->run_to, b->ev_to);
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#endif
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graph[graph_nodes (nodes, b->run_from, b->ev_from, b->run_to, b->ev_to)]
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= 1;
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bl = bl->next;
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}
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}
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//! Destroy graph
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void goal_graph_destroy ()
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{
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if (graph != NULL)
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{
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memFree (graph, (nodes * nodes) * sizeof (int));
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graph = NULL;
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}
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}
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/**
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*
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* Externally available functions
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@ -132,7 +173,7 @@ node_number (int run, int ev)
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//! Yield graph index, given node1, node2 numbers
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__inline__ int
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graph_index (const int nodes, const int node1, const int node2)
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graph_index (const int node1, const int node2)
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{
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return ((node1 * nodes) + node2);
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}
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@ -157,59 +198,7 @@ graph_nodes (const int nodes, const int run1, const int ev1, const int run2,
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error ("node_number %i out of scope %i for %i,%i.", node2, nodes, run2,
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ev2);
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#endif
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return graph_index (nodes, node1, node2);
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}
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//! Compute closure graph
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/**
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*@returns 0 iff there is a cycle, 1 otherwise
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*/
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int
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closure_graph (Binding b)
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{
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int nodes;
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int *graph;
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int run, ev;
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List bl;
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// Setup graph
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nodes = node_count ();
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graph = memAlloc ((nodes * nodes) * sizeof (int));
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graph_fill (graph, nodes, 0);
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b->nodes = nodes;
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b->graph = graph;
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// Setup run order
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run = 0;
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while (run < sys->maxruns)
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{
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ev = 1;
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//!@todo This now reference to step, but we intend "length" as in Arachne.
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while (ev < sys->runs[run].step)
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{
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graph[graph_nodes (nodes, run, ev - 1, run, ev)] = 1;
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ev++;
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}
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run++;
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}
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// Setup bindings order
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bl = sys->bindings;
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while (bl != NULL)
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{
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Binding b;
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b = (Binding) bl->data;
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#ifdef DEBUG
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if (graph_nodes (nodes, b->run_from, b->ev_from, b->run_to, b->ev_to) >=
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(nodes * nodes))
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error ("Node out of scope for %i,%i -> %i,%i.\n", b->run_from,
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b->ev_from, b->run_to, b->ev_to);
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#endif
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graph[graph_nodes (nodes, b->run_from, b->ev_from, b->run_to, b->ev_to)]
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= 1;
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bl = bl->next;
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}
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return warshall (graph, nodes);
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return graph_index (node1, node2);
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}
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//! Print a binding (given a binding list pointer)
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@ -224,63 +213,144 @@ binding_print (void *bindany)
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return 1;
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}
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//! Add a binding
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/**
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* Note that bindings are added to the head of the list.
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*@returns True iff is a valid additional binding. False if not.
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*/
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int
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binding_add (int run_from, int ev_from, int run_to, int ev_to, Term term)
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{
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Binding b;
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int flag;
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#ifdef DEBUG
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if (DEBUGL (5))
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{
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eprintf ("Adding binding (%i,%i) --(", run_from, ev_from);
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termPrint (term);
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eprintf (")-->> (%i,%i)\n",
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run_to, ev_to);
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}
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if (ev_from >= sys->runs[run_from].step)
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error ("run_from event index too large for scenario.");
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if (ev_to >= sys->runs[run_to].step)
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error ("run_to event index too large for scenario.");
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if (run_from < 0 || run_from >= sys->maxruns)
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error ("run_from out of scope.");
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if (run_to < 0 || run_to >= sys->maxruns)
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error ("run_to out of scope.");
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#endif
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b = binding_create (run_from, ev_from, run_to, ev_to, term);
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sys->bindings = list_insert (sys->bindings, b);
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/*
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* Compute closure graph etc.
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*/
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flag = closure_graph (b);
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#ifdef DEBUG
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if (DEBUGL (5))
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{
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eprintf ("Adding binding result %i\n", flag);
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}
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#endif
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return flag;
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}
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//! Remove last additions, including last manual addition
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/**
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* Note that this concerns the head of the list.
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*/
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//! Add a goal
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void
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binding_remove_last ()
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goal_add (Term term, const int run, const int ev)
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{
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term = deVar (term);
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if (realTermTuple (term))
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{
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int width;
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int flag;
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int i;
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flag = 1;
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width = tupleCount (term);
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i = 0;
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while (i < width)
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{
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goal_add (tupleProject (term, i), run, ev);
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if (i > 0)
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{
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Binding b;
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if (sys->bindings != NULL)
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b = (Binding) sys->bindings->data;
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b->child = 1;
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}
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i++;
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}
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}
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else
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{
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Binding b;
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b = binding_create (term, run, ev);
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sys->bindings = list_insert (sys->bindings, b);
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}
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}
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//! Remove a goal
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void
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goal_remove_last ()
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{
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Binding b;
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int child;
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child = 1;
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while (child && (sys->bindings != NULL))
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{
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b = (Binding) sys->bindings->data;
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child = b->child;
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binding_destroy (b);
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sys->bindings = list_delete (sys->bindings);
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}
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}
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//! Bind a goal (0 if it must be pruned)
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int
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goal_bind (const Binding b, const int run, const int ev)
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{
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if (!b->done)
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{
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b->done = 1;
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b->run_from = run;
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b->ev_from = ev;
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goal_graph_create (b);
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return warshall (graph, nodes);
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}
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else
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{
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error ("Trying to bind a bound goal again.");
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}
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}
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//! Unbind a goal
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void
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goal_unbind (const Binding b)
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{
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if (b->done)
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{
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goal_graph_destroy (b);
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b->done = 0;
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}
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else
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{
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error ("Trying to unbind an unbound goal again.");
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}
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}
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//! Prune invalid state w.r.t. <=C minimal requirement
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/**
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* Intuition says this can be done a lot more efficient. Luckily this is the prototype.
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*
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*@returns True, if it's okay. If false, it needs to be pruned.
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*/
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int bindings_c_minimal ()
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{
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List bl;
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// Ensure a state graph
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goal_graph_create ();
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// For all goals
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bl = sys->bindings;
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while (bl != NULL)
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{
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Binding b;
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int run;
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int node_to;
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b = (Binding) bl->data;
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node_from = node_number (b->run_from, b->ev_from);
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// Find all preceding events
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for (run = 0; run <= sys->maxruns; run++)
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{
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int ev;
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//!@todo hardcoded reference to step, should be length
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for (ev = 0; run < sys->runs[run].step; ev++)
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{
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int node_comp;
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node_comp = node_number (run, ev);
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if (graph[ graph_index (node_comp, node_from)] > 0)
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{
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// this node is *before* the from node
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Roledef rd;
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rd = roledef_shift (sys->runs[run].start, ev);
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if (termInTerm (rd->message, b->term))
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{
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// This term already occurs as interm in a previous node!
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return 0;
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}
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}
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}
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}
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bl = bl->next;
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}
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return 1;
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}
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@ -4,13 +4,43 @@
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#include "term.h"
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#include "system.h"
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/*
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* Idea is the ev_from *has to* precede the ev_to
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*/
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struct binding
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{
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int done; //!< Iff true, it is bound
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int child; //!< Signifies some tuple unfolding, to remove created bindings.
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int run_from;
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int ev_from;
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int run_to;
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int ev_to;
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int *graph;
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int nodes;
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Term term;
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};
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typedef struct binding *Binding;
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void bindingInit (const System mysys);
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void bindingDone ();
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int node_count ();
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int node_number (int run, int ev);
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int binding_add (int run_from, int ev_from, int run_to, int ev_to, Term term);
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void binding_remove_last ();
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||||
|
||||
|
||||
int binding_print (void *bindany);
|
||||
|
||||
void goal_add (Term term, const int run, const int ev);
|
||||
void goal_remove_last ();
|
||||
int goal_bind (const Binding b, const int run, const int ev);
|
||||
void goal_unbind (const Binding b);
|
||||
|
||||
int bindings_c_minimal ();
|
||||
|
||||
#endif
|
||||
|
||||
Loading…
Reference in New Issue
Block a user