correlation.c File Reference

#include "spp_ai.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <time.h>
#include <math.h>
#include <alloca.h>
#include <sys/stat.h>
#include <pthread.h>
#include <libxml/xmlreader.h>

Data Structures
struct	AI_alert_correlation_key
struct	AI_alert_correlation
Enumerations
enum	{   inHyperAlert, inSnortIdTag, inPreTag, inPostTag,   TAG_NUM }
Functions
PRIVATE void	_AI_correlation_table_cleanup ()
	Clean up the correlation hash table.
PRIVATE void	_AI_print_correlated_alerts (AI_alert_correlation *corr, FILE *fp)
	Recursively write a flow of correlated alerts to a .dot file, ready for being rendered as graph.
PRIVATE char *	_AI_get_function_name (const char *orig_stmt)
	Get the name of the function called by a pre-condition or post-condition predicate.
PRIVATE char **	_AI_get_function_arguments (char *orig_stmt, int *n_args)
	Get the arguments passed to a function predicate in a pre-condition or post-condition (comma-separated values).
PRIVATE double	_AI_correlation_coefficient (AI_snort_alert *a, AI_snort_alert *b)
	Compute the correlation coefficient between two alerts, as INTERSECTION(pre(B), post(A) / UNION(pre(B), post(A)).
PRIVATE void	_AI_macro_subst (AI_snort_alert **alert)
	Substitute the macros in hyperalert pre-conditions and post-conditions with their associated values.
PRIVATE AI_hyperalert_info *	_AI_hyperalert_from_XML (AI_hyperalert_key key)
	Parse info about a hyperalert from a correlation XML file, if it exists.
void *	AI_alert_correlation_thread (void *arg)
	Thread for correlating clustered alerts.
Variables
PRIVATE AI_hyperalert_info *	hyperalerts = NULL
PRIVATE AI_config *	conf = NULL
PRIVATE AI_snort_alert *	alerts = NULL
PRIVATE AI_alert_correlation *	correlation_table = NULL
PRIVATE BOOL	lock_flag = false