-/* @(#) $Id: rules-config.c,v 1.5 2009/06/24 17:06:25 dcid Exp $ */
-
/* Copyright (C) 2009 Trend Micro Inc.
* All right reserved.
*
* This program is a free software; you can redistribute it
* and/or modify it under the terms of the GNU General Public
- * License (version 3) as published by the FSF - Free Software
+ * License (version 2) as published by the FSF - Free Software
* Foundation
*/
-/* Functions to handle the configuration files
- */
-
+#include <string.h>
+#include "config.h"
#include "shared.h"
#include "global-config.h"
+#include "config.h"
+
+/* Prototypes */
+static int cmpr(const void *a, const void *b) __attribute__((nonnull));
+static int file_in_list(unsigned int list_size, char *f_name, char *d_name, char **alist) __attribute__((nonnull));
+
+
+static int cmpr(const void *a, const void *b)
+{
+ return strcmp(*(const char *const *)a, *(const char *const *)b);
+}
+static int file_in_list(unsigned int list_size, char *f_name, char *d_name, char **alist)
+{
+ unsigned int i = 0;
+ for (i = 0; (i + 1) < list_size; i++) {
+ if ((strcmp(alist[i], f_name) == 0 || strcmp(alist[i], d_name) == 0)) {
+ return (1);
+ }
+ }
+ return (0);
+}
-int Read_Rules(XML_NODE node, void *configp, void *mailp)
+int Read_Rules(XML_NODE node, void *configp, __attribute__((unused)) void *mailp)
{
int i = 0;
+ unsigned int ii = 0;
- /* White list size */
- int rules_size = 1;
+ unsigned int rules_size = 1;
+ unsigned int lists_size = 1;
+ unsigned int decoders_size = 1;
+ char path[PATH_MAX + 2];
+ char f_name[PATH_MAX + 2];
+ unsigned int start_point = 0;
+ int att_count = 0;
+ struct dirent *entry;
+ DIR *dfd;
+ OSRegex regex;
/* XML definitions */
- char *xml_rules_include = "include";
+ const char *xml_rules_include = "include";
+ const char *xml_rules_rule = "rule";
+ const char *xml_rules_rules_dir = "rule_dir";
+ const char *xml_rules_lists = "list";
+ const char *xml_rules_decoders = "decoder";
+ const char *xml_rules_decoders_dir = "decoder_dir";
_Config *Config;
-
+
Config = (_Config *)configp;
-
- while(node[i])
- {
- if(!node[i]->element)
- {
- merror(XML_ELEMNULL, ARGV0);
- return(OS_INVALID);
- }
- else if(!node[i]->content)
- {
- merror(XML_VALUENULL, ARGV0, node[i]->element);
- return(OS_INVALID);
+
+ /* Initialize OSRegex */
+ memset(®ex, 0, sizeof(regex));
+
+ while (node[i]) {
+ if (!node[i]->element) {
+ merror(XML_ELEMNULL, __local_name);
+ return (OS_INVALID);
+ } else if (!node[i]->content) {
+ merror(XML_VALUENULL, __local_name, node[i]->element);
+ return (OS_INVALID);
}
/* Mail notification */
- else if(strcmp(node[i]->element, xml_rules_include) == 0)
- {
+ else if ((strcmp(node[i]->element, xml_rules_include) == 0) ||
+ (strcmp(node[i]->element, xml_rules_rule) == 0)) {
rules_size++;
- Config->includes = realloc(Config->includes,
- sizeof(char *)*rules_size);
- if(!Config->includes)
- {
- merror(MEM_ERROR, ARGV0);
- return(OS_INVALID);
+ Config->includes = (char **) realloc(Config->includes,
+ sizeof(char *)*rules_size);
+ if (!Config->includes) {
+ merror(MEM_ERROR, __local_name, errno, strerror(errno));
+ return (OS_INVALID);
}
- os_strdup(node[i]->content,Config->includes[rules_size -2]);
- Config->includes[rules_size -1] = NULL;
- }
- else
- {
- merror(XML_INVELEM, ARGV0, node[i]->element);
- return(OS_INVALID);
+ os_strdup(node[i]->content, Config->includes[rules_size - 2]);
+ Config->includes[rules_size - 1] = NULL;
+ debug1("adding rule: %s", node[i]->content);
+ } else if (strcmp(node[i]->element, xml_rules_decoders) == 0) {
+ decoders_size++;
+ Config->decoders = (char **) realloc(Config->decoders,
+ sizeof(char *)*decoders_size);
+ if (!Config->decoders) {
+ merror(MEM_ERROR, __local_name, errno, strerror(errno));
+ return (OS_INVALID);
+ }
+
+ os_strdup(node[i]->content, Config->decoders[decoders_size - 2]);
+ Config->decoders[decoders_size - 1] = NULL;
+ debug1("adding decoder: %s", node[i]->content);
+ } else if (strcmp(node[i]->element, xml_rules_lists) == 0) {
+ lists_size++;
+ Config->lists = (char **) realloc(Config->lists,
+ sizeof(char *)*lists_size);
+ if (!Config->lists) {
+ merror(MEM_ERROR, __local_name, errno, strerror(errno));
+ return (OS_INVALID);
+ }
+ os_strdup(node[i]->content, Config->lists[lists_size - 2]);
+ Config->lists[lists_size - 1] = NULL;
+
+ } else if (strcmp(node[i]->element, xml_rules_decoders_dir) == 0) {
+
+ if (node[i]->attributes && node[i]->values) {
+ while (node[i]->attributes[att_count]) {
+ if ((strcasecmp(node[i]->attributes[att_count], "pattern") == 0)) {
+ if (node[i]->values[att_count]) {
+ if (!OSRegex_Compile(node[i]->values[att_count], ®ex, 0)) {
+ merror(CONFIG_ERROR, __local_name, "pattern in decoders_dir does not compile");
+ merror("%s: ERROR: Regex would not compile", __local_name);
+ return (-1);
+ }
+ }
+ }
+ att_count++;
+ }
+ } else {
+ OSRegex_Compile(".xml$", ®ex, 0);
+ }
+
+#ifdef TESTRULE
+ snprintf(path, PATH_MAX + 1, "%s", node[i]->content);
+#else
+ snprintf(path, PATH_MAX + 1, "%s/%s", DEFAULTDIR, node[i]->content);
+#endif
+
+ f_name[PATH_MAX + 1] = '\0';
+ dfd = opendir(path);
+
+ att_count = 0; // Reset this variable after it was used in decoder
+
+ if (dfd != NULL) {
+ start_point = decoders_size - 1;
+ while ((entry = readdir(dfd)) != NULL) {
+ snprintf(f_name, PATH_MAX + 1, "%s/%s", node[i]->content, entry->d_name);
+
+ /* Ignore . and .. */
+ if ((strcmp(entry->d_name, ".") == 0) || (strcmp(entry->d_name, "..") == 0)) {
+ continue;
+ }
+
+ /* No duplicates allowed */
+ if (file_in_list(decoders_size, f_name, entry->d_name, Config->decoders)) {
+ continue;
+ }
+
+ if (OSRegex_Execute(f_name, ®ex)) {
+ decoders_size++;
+ Config->decoders = (char **) realloc(Config->decoders, sizeof(char *)*decoders_size);
+ if (!Config->decoders) {
+ merror(MEM_ERROR, __local_name, errno, strerror(errno));
+ OSRegex_FreePattern(®ex);
+ closedir(dfd);
+ return (-1);
+ }
+
+ os_strdup(f_name, Config->decoders[decoders_size - 2]);
+ Config->decoders[decoders_size - 1] = NULL;
+ debug1("adding decoder: %s", f_name);
+ } else {
+ debug1("Regex does not match \"%s\"", f_name);
+ }
+ }
+
+ OSRegex_FreePattern(®ex);
+ closedir(dfd);
+ /* Sort just then newly added items */
+ qsort(Config->decoders + start_point , decoders_size - start_point - 1, sizeof(char *), cmpr);
+ }
+ debug1("decoders_size %d", decoders_size);
+ for (ii = 0; ii < decoders_size - 1; ii++) {
+ debug1("- %s", Config->decoders[ii]);
+ }
+ } else if (strcmp(node[i]->element, xml_rules_rules_dir) == 0) {
+ if (node[i]->attributes && node[i]->values) {
+ while (node[i]->attributes[att_count]) {
+ if ((strcasecmp(node[i]->attributes[att_count], "pattern") == 0)) {
+ if (node[i]->values[att_count]) {
+ if (!OSRegex_Compile(node[i]->values[att_count], ®ex, 0)) {
+ merror(CONFIG_ERROR, __local_name, "pattern in rules_dir does not compile");
+ merror("%s: ERROR: Regex would not compile", __local_name);
+ return (-1);
+ }
+ }
+ }
+ att_count++;
+ }
+ } else {
+ OSRegex_Compile(".xml$", ®ex, 0);
+ }
+
+#ifdef TESTRULE
+ snprintf(path, PATH_MAX + 1, "%s", node[i]->content);
+#else
+ snprintf(path, PATH_MAX + 1, "%s/%s", DEFAULTDIR, node[i]->content);
+#endif
+
+ f_name[PATH_MAX + 1] = '\0';
+ dfd = opendir(path);
+
+ if (dfd != NULL) {
+ start_point = rules_size - 1;
+ while ((entry = readdir(dfd)) != NULL) {
+ snprintf(f_name, PATH_MAX + 1, "%s/%s", node[i]->content, entry->d_name);
+
+ /* Ignore . and .. */
+ if ((strcmp(entry->d_name, ".") == 0) || (strcmp(entry->d_name, "..") == 0)) {
+ continue;
+ }
+
+ /* No duplicates allowed */
+ if (file_in_list(rules_size, f_name, entry->d_name, Config->includes)) {
+ continue;
+ }
+
+ if (OSRegex_Execute(f_name, ®ex)) {
+ rules_size++;
+ Config->includes = (char **) realloc(Config->includes, sizeof(char *)*rules_size);
+ if (!Config->includes) {
+ merror(MEM_ERROR, __local_name, errno, strerror(errno));
+ OSRegex_FreePattern(®ex);
+ closedir(dfd);
+ return (-1);
+ }
+
+ os_strdup(f_name, Config->includes[rules_size - 2]);
+ Config->includes[rules_size - 1] = NULL;
+ debug1("adding rule: %s", f_name);
+ } else {
+ debug1("Regex does not match \"%s\"", f_name);
+ }
+ }
+
+ OSRegex_FreePattern(®ex);
+ closedir(dfd);
+ /* Sort just then newly added items */
+ qsort(Config->includes + start_point , rules_size - start_point - 1, sizeof(char *), cmpr);
+ }
+ } else {
+ merror(XML_INVELEM, __local_name, node[i]->element);
+ OSRegex_FreePattern(®ex);
+ return (OS_INVALID);
}
i++;
}
- return(0);
+ return (0);
}
-
-
-/* EOF */
projects / ossec-hids.git / blobdiff