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Using RadixTree instead of list to storage IPs

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Used by the operator @ipMatch and variants, this structure storage all the IPs
addresses for later comparison. Last version was using RadixTree only if the
set of IPs was specified from files. IPs specified as parameters, was using
a chained list. Chained lists may affect the performance, since lookups in
worst case will be O(n). RadixTrees could provide better results depending
on the amount of elements and its contents.
This commit is contained in:
Felipe Zimmerle
2013-10-31 09:53:24 -07:00
parent 80185e2a90
commit 0037a0732a
7 changed files with 96 additions and 151 deletions
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10
apache2/re_operators.c
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@@ -98,9 +98,9 @@ static int msre_op_ipmatch_param_init(msre_rule *rule, char **error_msg) {
else
*error_msg = NULL;
param = apr_pstrdup(rule->ruleset->mp, rule->op_param);//, &rule->ip_op);
param = apr_pstrdup(rule->ruleset->mp, rule->op_param);
res = ip_list_from_param(rule->ruleset->mp, param, &rule->ip_op,
res = ip_tree_from_param(rule->ruleset->mp, param, &rule->ip_op,
error_msg);
if (res)
@@ -122,7 +122,7 @@ static int msre_op_ipmatch_param_init(msre_rule *rule, char **error_msg) {
* \retval 0 On No Match
*/
static int msre_op_ipmatch_execute(modsec_rec *msr, msre_rule *rule, msre_var *var, char **error_msg) {
msre_ipmatch *current = rule->ip_op;
TreeRoot *rtree = rule->ip_op;
int res = 0;
if (error_msg == NULL)
@@ -130,12 +130,12 @@ static int msre_op_ipmatch_execute(modsec_rec *msr, msre_rule *rule, msre_var *v
else
*error_msg = NULL;
if(current == NULL) {
if (rtree == NULL) {
msr_log(msr, 1, "ipMatch Internal Error: ipmatch value is null.");
return 0;
}
res = list_contains_ip(msr->mp, current, var->value, error_msg);
res = tree_contains_ip(msr->mp, rtree, var->value, NULL, error_msg);
if (res < 0) {
msr_log(msr, 1, "%s", *error_msg);