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index e0eedf00dc181587a97684f42ebaf35248f2f47c..e5735d3728e8157ebc90d3157c0278ea6b42acdb 100644 (file)
--- a/src/core/store_lookup.c
+++ b/src/core/store_lookup.c
* simple full table scan is supported only.
*/
+#if HAVE_CONFIG_H
+# include "config.h"
+#endif /* HAVE_CONFIG_H */
+
#include "sysdb.h"
#include "core/store-private.h"
+#include "core/object.h"
#include <assert.h>
#include <sys/types.h>
#include <regex.h>
+#include <stdlib.h>
#include <string.h>
/*
* private data types
*/
-/* match the name of something */
-typedef struct {
- const char *name;
- regex_t *name_re;
-} name_matcher_t;
-
-/* matcher base type */
-typedef struct {
- /* type of the matcher */
- int type;
-} matcher_t;
-#define M(m) ((matcher_t *)(m))
-
-/* logical operator matcher */
-typedef struct {
- matcher_t super;
-
- /* left and right hand operands */
- matcher_t *left;
- matcher_t *right;
-} op_matcher_t;
-#define OP_M(m) ((op_matcher_t *)(m))
-
-/* match any type of object by it's base information */
typedef struct {
- matcher_t super;
+ sdb_store_matcher_t *m;
+ sdb_store_lookup_cb cb;
+ void *user_data;
+} lookup_iter_data_t;
- /* match by the name of the object */
- name_matcher_t name;
-} obj_matcher_t;
-#define OBJ_M(m) ((obj_matcher_t *)(m))
+/*
+ * private helper functions
+ */
-/* match attributes */
-typedef struct {
- obj_matcher_t super;
- /* XXX: this needs to be more flexible;
- * add support for type-specific operators */
- name_matcher_t value;
-} attr_matcher_t;
-#define ATTR_M(m) ((attr_matcher_t *)(m))
-
-/* match services */
-typedef struct {
- obj_matcher_t super;
- /* match by attributes assigned to the service */
- attr_matcher_t *attr;
-} service_matcher_t;
-#define SERVICE_M(m) ((service_matcher_t *)(m))
+static int
+lookup_iter(sdb_store_base_t *obj, void *user_data)
+{
+ lookup_iter_data_t *d = user_data;
-/* match hosts */
-typedef struct {
- obj_matcher_t super;
- /* match by services assigned to the host */
- service_matcher_t *service;
- /* match by attributes assigned to the host */
- attr_matcher_t *attr;
-} host_matcher_t;
-#define HOST_M(m) ((host_matcher_t *)(m))
+ if (sdb_store_matcher_matches(d->m, obj))
+ return d->cb(obj, d->user_data);
+ return 0;
+} /* lookup_iter */
/*
* matcher implementations
*/
static int
-match_logical(matcher_t *m, sdb_store_base_t *obj);
+match_logical(sdb_store_matcher_t *m, sdb_store_base_t *obj);
+static int
+match_unary(sdb_store_matcher_t *m, sdb_store_base_t *obj);
static int
-match_obj(matcher_t *m, sdb_store_base_t *obj);
+match_obj(sdb_store_matcher_t *m, sdb_store_base_t *obj);
/* specific matchers */
assert(m);
if ((! m->name) && (! m->name_re))
- return 0;
+ return 1;
if (! name)
name = "";
if (m->name && strcasecmp(m->name, name))
- return -1;
+ return 0;
if (m->name_re && regexec(m->name_re, name,
/* matches */ 0, NULL, /* flags = */ 0))
- return -1;
- return 0;
+ return 0;
+ return 1;
} /* match_name */
/* match attribute specific values;
assert(m && obj);
if (obj->type != SDB_ATTRIBUTE)
- return -1;
+ return 0;
{
sdb_attribute_t *attr = SDB_ATTR(obj);
char buf[sdb_data_strlen(&attr->value) + 1];
if (sdb_data_format(&attr->value, buf, sizeof(buf), SDB_UNQUOTED) <= 0)
- return -1;
+ return 0;
return match_name(&m->value, buf);
}
} /* match_attr */
assert(m && obj);
if (obj->type != SDB_SERVICE)
- return -1;
+ return 0;
if (! m->attr)
- return 0;
+ return 1;
iter = sdb_llist_get_iter(SDB_STORE_OBJ(obj)->attributes);
while (sdb_llist_iter_has_next(iter)) {
sdb_store_base_t *attr = STORE_BASE(sdb_llist_iter_get_next(iter));
/* if any of the attributes matches we found a matching service */
- if (! match_obj(M(m->attr), attr)) {
+ if (match_obj(M(m->attr), attr)) {
sdb_llist_iter_destroy(iter);
- return 0;
+ return 1;
}
}
sdb_llist_iter_destroy(iter);
- return -1;
+ return 0;
} /* match_service */
/* match host specific values;
assert(m && obj);
if (obj->type != SDB_HOST)
- return -1;
+ return 0;
if (m->service) {
iter = sdb_llist_get_iter(SDB_STORE_OBJ(obj)->children);
- status = -1;
+ status = 0;
}
else {
iter = NULL;
- status = 0;
+ status = 1;
}
while (sdb_llist_iter_has_next(iter)) {
sdb_store_base_t *service = STORE_BASE(sdb_llist_iter_get_next(iter));
/* found a matching service */
- if (! match_obj(M(m->service), service)) {
- status = 0;
+ if (match_obj(M(m->service), service)) {
+ status = 1;
break;
}
}
sdb_llist_iter_destroy(iter);
- if (status)
+ if (! status)
return status;
else if (! m->attr)
- return 0;
+ return 1;
iter = sdb_llist_get_iter(SDB_STORE_OBJ(obj)->attributes);
while (sdb_llist_iter_has_next(iter)) {
sdb_store_base_t *attr = STORE_BASE(sdb_llist_iter_get_next(iter));
/* if any attribute matches, we found a matching host */
- if (! match_obj(M(m->attr), attr)) {
+ if (match_obj(M(m->attr), attr)) {
sdb_llist_iter_destroy(iter);
- return 0;
+ return 1;
}
}
sdb_llist_iter_destroy(iter);
- return -1;
+ return 0;
} /* match_host */
/* generic matchers */
-enum {
- MATCHER_OR,
- MATCHER_AND,
- MATCHER_ATTR,
- MATCHER_SERVICE,
- MATCHER_HOST,
-};
+typedef int (*matcher_cb)(sdb_store_matcher_t *, sdb_store_base_t *);
-typedef int (*matcher_cb)(matcher_t *, sdb_store_base_t *);
-
-/* this array needs to be indexable by the matcher types */
+/* this array needs to be indexable by the matcher types;
+ * -> update the enum in store-private.h when updating this */
static matcher_cb matchers[] = {
match_logical,
match_logical,
+ match_unary,
match_obj,
match_obj,
match_obj,
};
static int
-match(matcher_t *m, sdb_store_base_t *obj)
-{
- assert(m && obj);
- assert((0 <= m->type)
- && ((size_t)m->type < SDB_STATIC_ARRAY_LEN(matchers)));
-
- return matchers[m->type](m, obj);
-} /* match */
-
-static int
-match_logical(matcher_t *m, sdb_store_base_t *obj)
+match_logical(sdb_store_matcher_t *m, sdb_store_base_t *obj)
{
int status;
assert(m && obj);
assert(OP_M(m)->left && OP_M(m)->right);
- status = match(OP_M(m)->left, obj);
+ status = sdb_store_matcher_matches(OP_M(m)->left, obj);
/* lazy evaluation */
- if (status && (m->type == MATCHER_AND))
+ if ((! status) && (m->type == MATCHER_AND))
return status;
- else if ((! status) && (m->type == MATCHER_OR))
+ else if (status && (m->type == MATCHER_OR))
return status;
- return match(OP_M(m)->right, obj);
+ return sdb_store_matcher_matches(OP_M(m)->right, obj);
} /* match_logical */
static int
-match_obj(matcher_t *m, sdb_store_base_t *obj)
+match_unary(sdb_store_matcher_t *m, sdb_store_base_t *obj)
+{
+ assert(m && obj);
+ assert(UOP_M(m)->op);
+
+ return !sdb_store_matcher_matches(UOP_M(m)->op, obj);
+} /* match_unary */
+
+static int
+match_obj(sdb_store_matcher_t *m, sdb_store_base_t *obj)
{
int status;
assert(m && obj);
status = match_name(&OBJ_M(m)->name, obj->super.name);
- if (status)
+ if (! status)
return status;
switch (m->type) {
return match_host(HOST_M(m), obj);
break;
}
- return -1;
+ return 0;
} /* match_obj */
+/*
+ * private matcher types
+ */
+
+/* initializes a name matcher consuming two elements from ap */
+static int
+name_matcher_init(name_matcher_t *m, va_list ap)
+{
+ const char *name = va_arg(ap, const char *);
+ const char *name_re = va_arg(ap, const char *);
+
+ if (name) {
+ m->name = strdup(name);
+ if (! m->name)
+ return -1;
+ }
+ if (name_re) {
+ m->name_re = malloc(sizeof(*m->name_re));
+ if (! m->name_re)
+ return -1;
+ if (regcomp(m->name_re, name_re, REG_EXTENDED | REG_ICASE | REG_NOSUB))
+ return -1;
+ }
+ return 0;
+} /* name_matcher_init */
+
+static void
+name_matcher_destroy(name_matcher_t *m)
+{
+ if (m->name)
+ free(m->name);
+ if (m->name_re) {
+ regfree(m->name_re);
+ free(m->name_re);
+ }
+} /* name_matcher_destroy */
+
+/* initializes an object matcher consuming two elements from ap */
+static int
+obj_matcher_init(sdb_object_t *obj, va_list ap)
+{
+ obj_matcher_t *m = OBJ_M(obj);
+ return name_matcher_init(&m->name, ap);
+} /* obj_matcher_init */
+
+static void
+obj_matcher_destroy(sdb_object_t *obj)
+{
+ obj_matcher_t *m = OBJ_M(obj);
+ name_matcher_destroy(&m->name);
+} /* obj_matcher_destroy */
+
+static int
+attr_matcher_init(sdb_object_t *obj, va_list ap)
+{
+ attr_matcher_t *attr = ATTR_M(obj);
+ int status;
+
+ M(obj)->type = MATCHER_ATTR;
+
+ status = obj_matcher_init(obj, ap);
+ if (! status)
+ status = name_matcher_init(&attr->value, ap);
+ return status;
+} /* attr_matcher_init */
+
+static void
+attr_matcher_destroy(sdb_object_t *obj)
+{
+ attr_matcher_t *attr = ATTR_M(obj);
+
+ obj_matcher_destroy(obj);
+ name_matcher_destroy(&attr->value);
+} /* attr_matcher_destroy */
+
+static int
+service_matcher_init(sdb_object_t *obj, va_list ap)
+{
+ attr_matcher_t *attr;
+ int status;
+
+ M(obj)->type = MATCHER_SERVICE;
+
+ status = obj_matcher_init(obj, ap);
+ if (status)
+ return status;
+
+ attr = va_arg(ap, attr_matcher_t *);
+
+ sdb_object_ref(SDB_OBJ(attr));
+ SERVICE_M(obj)->attr = attr;
+ return 0;
+} /* service_matcher_init */
+
+static void
+service_matcher_destroy(sdb_object_t *obj)
+{
+ obj_matcher_destroy(obj);
+ sdb_object_deref(SDB_OBJ(SERVICE_M(obj)->attr));
+} /* service_matcher_destroy */
+
+static int
+host_matcher_init(sdb_object_t *obj, va_list ap)
+{
+ service_matcher_t *service;
+ attr_matcher_t *attr;
+ int status;
+
+ M(obj)->type = MATCHER_HOST;
+
+ status = obj_matcher_init(obj, ap);
+ if (status)
+ return status;
+
+ service = va_arg(ap, service_matcher_t *);
+ attr = va_arg(ap, attr_matcher_t *);
+
+ sdb_object_ref(SDB_OBJ(service));
+ HOST_M(obj)->service = service;
+ sdb_object_ref(SDB_OBJ(attr));
+ HOST_M(obj)->attr = attr;
+ return 0;
+} /* host_matcher_init */
+
+static void
+host_matcher_destroy(sdb_object_t *obj)
+{
+ obj_matcher_destroy(obj);
+ sdb_object_deref(SDB_OBJ(HOST_M(obj)->service));
+ sdb_object_deref(SDB_OBJ(HOST_M(obj)->attr));
+} /* host_matcher_destroy */
+
+static int
+op_matcher_init(sdb_object_t *obj, va_list ap)
+{
+ M(obj)->type = va_arg(ap, int);
+ if ((M(obj)->type != MATCHER_OR) && (M(obj)->type != MATCHER_AND))
+ return -1;
+
+ OP_M(obj)->left = va_arg(ap, sdb_store_matcher_t *);
+ sdb_object_ref(SDB_OBJ(OP_M(obj)->left));
+ OP_M(obj)->right = va_arg(ap, sdb_store_matcher_t *);
+ sdb_object_ref(SDB_OBJ(OP_M(obj)->right));
+
+ if ((! OP_M(obj)->left) || (! OP_M(obj)->right))
+ return -1;
+ return 0;
+} /* op_matcher_init */
+
+static void
+op_matcher_destroy(sdb_object_t *obj)
+{
+ if (OP_M(obj)->left)
+ sdb_object_deref(SDB_OBJ(OP_M(obj)->left));
+ if (OP_M(obj)->right)
+ sdb_object_deref(SDB_OBJ(OP_M(obj)->right));
+} /* op_matcher_destroy */
+
+static int
+uop_matcher_init(sdb_object_t *obj, va_list ap)
+{
+ M(obj)->type = va_arg(ap, int);
+ if (M(obj)->type != MATCHER_NOT)
+ return -1;
+
+ UOP_M(obj)->op = va_arg(ap, sdb_store_matcher_t *);
+ sdb_object_ref(SDB_OBJ(UOP_M(obj)->op));
+
+ if (! UOP_M(obj)->op)
+ return -1;
+ return 0;
+} /* uop_matcher_init */
+
+static void
+uop_matcher_destroy(sdb_object_t *obj)
+{
+ if (UOP_M(obj)->op)
+ sdb_object_deref(SDB_OBJ(UOP_M(obj)->op));
+} /* uop_matcher_destroy */
+
+static sdb_type_t attr_type = {
+ /* size = */ sizeof(attr_matcher_t),
+ /* init = */ attr_matcher_init,
+ /* destroy = */ attr_matcher_destroy,
+};
+
+static sdb_type_t service_type = {
+ /* size = */ sizeof(service_matcher_t),
+ /* init = */ service_matcher_init,
+ /* destroy = */ service_matcher_destroy,
+};
+
+static sdb_type_t host_type = {
+ /* size = */ sizeof(host_matcher_t),
+ /* init = */ host_matcher_init,
+ /* destroy = */ host_matcher_destroy,
+};
+
+static sdb_type_t op_type = {
+ /* size = */ sizeof(op_matcher_t),
+ /* init = */ op_matcher_init,
+ /* destroy = */ op_matcher_destroy,
+};
+
+static sdb_type_t uop_type = {
+ /* size = */ sizeof(uop_matcher_t),
+ /* init = */ uop_matcher_init,
+ /* destroy = */ uop_matcher_destroy,
+};
+
+/*
+ * public API
+ */
+
+sdb_store_matcher_t *
+sdb_store_attr_matcher(const char *attr_name, const char *attr_name_re,
+ const char *attr_value, const char *attr_value_re)
+{
+ return M(sdb_object_create("attr-matcher", attr_type,
+ attr_name, attr_name_re, attr_value, attr_value_re));
+} /* sdb_store_attr_matcher */
+
+sdb_store_matcher_t *
+sdb_store_service_matcher(const char *service_name, const char *service_name_re,
+ sdb_store_matcher_t *attr_matcher)
+{
+ return M(sdb_object_create("service-matcher", service_type,
+ service_name, service_name_re, attr_matcher));
+} /* sdb_store_service_matcher */
+
+sdb_store_matcher_t *
+sdb_store_host_matcher(const char *host_name, const char *host_name_re,
+ sdb_store_matcher_t *service_matcher,
+ sdb_store_matcher_t *attr_matcher)
+{
+ return M(sdb_object_create("host-matcher", host_type,
+ host_name, host_name_re, service_matcher, attr_matcher));
+} /* sdb_store_host_matcher */
+
+sdb_store_matcher_t *
+sdb_store_matcher_parse_cmp(const char *obj_type, const char *attr,
+ const char *op, const char *value)
+{
+ int typ = -1;
+ int inv = 0;
+
+ sdb_store_matcher_t *m = NULL;
+
+ const char *matcher = NULL;
+ const char *matcher_re = NULL;
+
+ if (! strcasecmp(obj_type, "host"))
+ typ = SDB_HOST;
+ else if (! strcasecmp(obj_type, "service"))
+ typ = SDB_SERVICE;
+ else if (! strcasecmp(obj_type, "attribute"))
+ typ = SDB_ATTRIBUTE;
+
+ /* TODO: support other operators */
+ if (! strcasecmp(op, "=")) {
+ matcher = value;
+ }
+ else if (! strcasecmp(op, "!=")) {
+ matcher = value;
+ inv = 1;
+ }
+ else if (! strcasecmp(op, "=~")) {
+ matcher_re = value;
+ }
+ else if (! strcasecmp(op, "!~")) {
+ matcher_re = value;
+ inv = 1;
+ }
+ else
+ return NULL;
+
+ if (! strcasecmp(attr, "name")) {
+ /* accept */
+ }
+ else if (typ == SDB_ATTRIBUTE)
+ m = sdb_store_host_matcher(/* name = */ NULL, NULL,
+ /* service = */ NULL,
+ sdb_store_attr_matcher(attr, NULL, matcher, matcher_re));
+ else
+ return NULL;
+
+ if (m) {
+ /* accept the attribute value matcher */
+ }
+ else if (typ == SDB_HOST)
+ m = sdb_store_host_matcher(matcher, matcher_re, NULL, NULL);
+ else if (typ == SDB_SERVICE)
+ m = sdb_store_host_matcher(/* name = */ NULL, NULL,
+ sdb_store_service_matcher(matcher, matcher_re, NULL),
+ /* attr = */ NULL);
+ else if (typ == SDB_ATTRIBUTE)
+ m = sdb_store_host_matcher(/* name = */ NULL, NULL,
+ /* service = */ NULL,
+ sdb_store_attr_matcher(matcher, matcher_re, NULL, NULL));
+
+ if (m && inv) {
+ sdb_store_matcher_t *tmp;
+ tmp = sdb_store_inv_matcher(m);
+ /* pass ownership to the inverse matcher */
+ sdb_object_deref(SDB_OBJ(m));
+ m = tmp;
+ }
+ return m;
+} /* sdb_store_matcher_parse_cmp */
+
+sdb_store_matcher_t *
+sdb_store_dis_matcher(sdb_store_matcher_t *left, sdb_store_matcher_t *right)
+{
+ return M(sdb_object_create("dis-matcher", op_type, MATCHER_OR,
+ left, right));
+} /* sdb_store_dis_matcher */
+
+sdb_store_matcher_t *
+sdb_store_con_matcher(sdb_store_matcher_t *left, sdb_store_matcher_t *right)
+{
+ return M(sdb_object_create("con-matcher", op_type, MATCHER_AND,
+ left, right));
+} /* sdb_store_con_matcher */
+
+sdb_store_matcher_t *
+sdb_store_inv_matcher(sdb_store_matcher_t *m)
+{
+ return M(sdb_object_create("inv-matcher", uop_type, MATCHER_NOT, m));
+} /* sdb_store_inv_matcher */
+
+int
+sdb_store_matcher_matches(sdb_store_matcher_t *m, sdb_store_base_t *obj)
+{
+ /* "NULL" always matches */
+ if ((! m) || (! obj))
+ return 1;
+
+ if ((m->type < 0) || ((size_t)m->type >= SDB_STATIC_ARRAY_LEN(matchers)))
+ return 0;
+
+ return matchers[m->type](m, obj);
+} /* sdb_store_matcher_matches */
+
+int
+sdb_store_lookup(sdb_store_matcher_t *m, sdb_store_lookup_cb cb,
+ void *user_data)
+{
+ lookup_iter_data_t data = { m, cb, user_data };
+
+ if (! cb)
+ return -1;
+ return sdb_store_iterate(lookup_iter, &data);
+} /* sdb_store_lookup */
+
/* vim: set tw=78 sw=4 ts=4 noexpandtab : */