--- /dev/null
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ This file is part of systemd.
+
+ Copyright 2013 Lennart Poettering
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "strv.h"
+#include "set.h"
+#include "bus-internal.h"
+#include "bus-message.h"
+#include "bus-type.h"
+#include "bus-signature.h"
+#include "bus-introspect.h"
+#include "bus-objects.h"
+
+static int node_vtable_get_userdata(
+ sd_bus *bus,
+ const char *path,
+ struct node_vtable *c,
+ void **userdata) {
+
+ void *u;
+ int r;
+
+ assert(bus);
+ assert(path);
+ assert(c);
+
+ u = c->userdata;
+ if (c->find) {
+ r = c->find(bus, path, c->interface, &u, u);
+ if (r <= 0)
+ return r;
+ }
+
+ if (userdata)
+ *userdata = u;
+
+ return 1;
+}
+
+static void *vtable_property_convert_userdata(const sd_bus_vtable *p, void *u) {
+ assert(p);
+
+ return (uint8_t*) u + p->property.offset;
+}
+
+static int vtable_property_get_userdata(
+ sd_bus *bus,
+ const char *path,
+ struct vtable_member *p,
+ void **userdata) {
+
+ void *u;
+ int r;
+
+ assert(bus);
+ assert(path);
+ assert(p);
+ assert(userdata);
+
+ r = node_vtable_get_userdata(bus, path, p->parent, &u);
+ if (r <= 0)
+ return r;
+
+ *userdata = vtable_property_convert_userdata(p->vtable, u);
+ return 1;
+}
+
+static int add_enumerated_to_set(sd_bus *bus, const char *prefix, struct node_enumerator *first, Set *s) {
+ struct node_enumerator *c;
+ int r;
+
+ assert(bus);
+ assert(prefix);
+ assert(s);
+
+ LIST_FOREACH(enumerators, c, first) {
+ char **children = NULL, **k;
+
+ r = c->callback(bus, prefix, &children, c->userdata);
+ if (r < 0)
+ return r;
+
+ STRV_FOREACH(k, children) {
+ if (r < 0) {
+ free(*k);
+ continue;
+ }
+
+ if (!object_path_is_valid(*k) && object_path_startswith(*k, prefix)) {
+ free(*k);
+ r = -EINVAL;
+ continue;
+ }
+
+ r = set_consume(s, *k);
+ }
+
+ free(children);
+ if (r < 0)
+ return r;
+ }
+
+ return 0;
+}
+
+static int add_subtree_to_set(sd_bus *bus, const char *prefix, struct node *n, Set *s) {
+ struct node *i;
+ int r;
+
+ assert(bus);
+ assert(prefix);
+ assert(n);
+ assert(s);
+
+ r = add_enumerated_to_set(bus, prefix, n->enumerators, s);
+ if (r < 0)
+ return r;
+
+ LIST_FOREACH(siblings, i, n->child) {
+ char *t;
+
+ t = strdup(i->path);
+ if (!t)
+ return -ENOMEM;
+
+ r = set_consume(s, t);
+ if (r < 0 && r != -EEXIST)
+ return r;
+
+ r = add_subtree_to_set(bus, prefix, i, s);
+ if (r < 0)
+ return r;
+ }
+
+ return 0;
+}
+
+static int get_child_nodes(sd_bus *bus, const char *prefix, struct node *n, Set **_s) {
+ Set *s = NULL;
+ int r;
+
+ assert(bus);
+ assert(n);
+ assert(_s);
+
+ s = set_new(string_hash_func, string_compare_func);
+ if (!s)
+ return -ENOMEM;
+
+ r = add_subtree_to_set(bus, prefix, n, s);
+ if (r < 0) {
+ set_free_free(s);
+ return r;
+ }
+
+ *_s = s;
+ return 0;
+}
+
+static int node_callbacks_run(
+ sd_bus *bus,
+ sd_bus_message *m,
+ struct node_callback *first,
+ bool require_fallback,
+ bool *found_object) {
+
+ struct node_callback *c;
+ int r;
+
+ assert(bus);
+ assert(m);
+ assert(found_object);
+
+ LIST_FOREACH(callbacks, c, first) {
+ if (require_fallback && !c->is_fallback)
+ continue;
+
+ *found_object = true;
+
+ if (c->last_iteration == bus->iteration_counter)
+ continue;
+
+ r = sd_bus_message_rewind(m, true);
+ if (r < 0)
+ return r;
+
+ r = c->callback(bus, m, c->userdata);
+ if (r != 0)
+ return r;
+ }
+
+ return 0;
+}
+
+static int method_callbacks_run(
+ sd_bus *bus,
+ sd_bus_message *m,
+ struct vtable_member *c,
+ bool require_fallback,
+ bool *found_object) {
+
+ const char *signature;
+ void *u;
+ int r;
+
+ assert(bus);
+ assert(m);
+ assert(c);
+ assert(found_object);
+
+ if (require_fallback && !c->parent->is_fallback)
+ return 0;
+
+ r = node_vtable_get_userdata(bus, m->path, c->parent, &u);
+ if (r <= 0)
+ return r;
+
+ *found_object = true;
+
+ r = sd_bus_message_rewind(m, true);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_get_signature(m, true, &signature);
+ if (r < 0)
+ return r;
+
+ if (!streq(strempty(c->vtable->method.signature), signature)) {
+ r = sd_bus_reply_method_errorf(bus, m,
+ "org.freedesktop.DBus.Error.InvalidArgs",
+ "Invalid arguments '%s' to call %s:%s, expecting '%s'.",
+ signature, c->interface, c->member, strempty(c->vtable->method.signature));
+ if (r < 0)
+ return r;
+
+ return 1;
+ }
+
+ if (c->vtable->method.handler)
+ return c->vtable->method.handler(bus, m, u);
+
+ /* If the method callback is NULL, make this a successful NOP */
+ r = sd_bus_reply_method_return(bus, m, NULL);
+ if (r < 0)
+ return r;
+
+ return 1;
+}
+
+static int invoke_property_get(
+ sd_bus *bus,
+ const sd_bus_vtable *v,
+ const char *path,
+ const char *interface,
+ const char *property,
+ sd_bus_message *m,
+ sd_bus_error *error,
+ void *userdata) {
+
+ int r;
+ void *p;
+
+ assert(bus);
+ assert(v);
+
+ if (v->property.get)
+ return v->property.get(bus, path, interface, property, m, error, userdata);
+
+ /* Automatic handling if no callback is defined. */
+
+ assert(bus_type_is_basic(v->property.signature[0]));
+
+ switch (v->property.signature[0]) {
+
+ case SD_BUS_TYPE_STRING:
+ case SD_BUS_TYPE_OBJECT_PATH:
+ case SD_BUS_TYPE_SIGNATURE:
+ p = *(char**) userdata;
+ break;
+
+ default:
+ p = userdata;
+ break;
+ }
+
+ r = sd_bus_message_append_basic(m, v->property.signature[0], p);
+ if (r < 0)
+ return r;
+
+ return 1;
+}
+
+static int invoke_property_set(
+ sd_bus *bus,
+ const sd_bus_vtable *v,
+ const char *path,
+ const char *interface,
+ const char *property,
+ sd_bus_message *value,
+ sd_bus_error *error,
+ void *userdata) {
+
+ int r;
+
+ assert(bus);
+ assert(v);
+
+ if (v->property.set)
+ return v->property.set(bus, path, interface, property, value, error, userdata);
+
+ /* Automatic handling if no callback is defined. */
+
+ assert(signature_is_single(v->property.signature, false));
+ assert(bus_type_is_basic(v->property.signature[0]));
+
+ switch (v->property.signature[0]) {
+
+ case SD_BUS_TYPE_STRING:
+ case SD_BUS_TYPE_OBJECT_PATH:
+ case SD_BUS_TYPE_SIGNATURE: {
+ const char *p;
+ char *n;
+
+ r = sd_bus_message_read_basic(value, v->property.signature[0], &p);
+ if (r < 0)
+ return r;
+
+ n = strdup(p);
+ if (!n)
+ return -ENOMEM;
+
+ free(*(char**) userdata);
+ *(char**) userdata = n;
+
+ break;
+ }
+
+ default:
+ r = sd_bus_message_read_basic(value, v->property.signature[0], userdata);
+ if (r < 0)
+ return r;
+
+ break;
+ }
+
+ return 1;
+}
+
+static int property_get_set_callbacks_run(
+ sd_bus *bus,
+ sd_bus_message *m,
+ struct vtable_member *c,
+ bool require_fallback,
+ bool is_get,
+ bool *found_object) {
+
+ _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
+ _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
+ void *u;
+ int r;
+
+ assert(bus);
+ assert(m);
+ assert(found_object);
+
+ if (require_fallback && !c->parent->is_fallback)
+ return 0;
+
+ r = vtable_property_get_userdata(bus, m->path, c, &u);
+ if (r <= 0)
+ return r;
+
+ *found_object = true;
+
+ r = sd_bus_message_new_method_return(bus, m, &reply);
+ if (r < 0)
+ return r;
+
+ c->last_iteration = bus->iteration_counter;
+
+ if (is_get) {
+ r = sd_bus_message_open_container(reply, 'v', c->vtable->property.signature);
+ if (r < 0)
+ return r;
+
+ r = invoke_property_get(bus, c->vtable, m->path, c->interface, c->member, reply, &error, u);
+ if (r < 0)
+ return r;
+
+ if (sd_bus_error_is_set(&error)) {
+ r = sd_bus_reply_method_error(bus, m, &error);
+ if (r < 0)
+ return r;
+
+ return 1;
+ }
+
+ r = sd_bus_message_close_container(reply);
+ if (r < 0)
+ return r;
+
+ } else {
+ if (c->vtable->type != _SD_BUS_VTABLE_WRITABLE_PROPERTY)
+ sd_bus_error_setf(&error, "org.freedesktop.DBus.Error.PropertyReadOnly", "Property '%s' is not writable.", c->member);
+ else {
+ r = sd_bus_message_enter_container(m, 'v', c->vtable->property.signature);
+ if (r < 0)
+ return r;
+
+ r = invoke_property_set(bus, c->vtable, m->path, c->interface, c->member, m, &error, u);
+ if (r < 0)
+ return r;
+ }
+
+ if (sd_bus_error_is_set(&error)) {
+ r = sd_bus_reply_method_error(bus, m, &error);
+ if (r < 0)
+ return r;
+
+ return 1;
+ }
+
+ r = sd_bus_message_exit_container(m);
+ if (r < 0)
+ return r;
+ }
+
+ r = sd_bus_send(bus, reply, NULL);
+ if (r < 0)
+ return r;
+
+ return 1;
+}
+
+static int vtable_append_all_properties(
+ sd_bus *bus,
+ sd_bus_message *reply,
+ const char *path,
+ struct node_vtable *c,
+ void *userdata,
+ sd_bus_error *error) {
+
+ const sd_bus_vtable *v;
+ int r;
+
+ assert(bus);
+ assert(reply);
+ assert(c);
+
+ for (v = c->vtable+1; v->type != _SD_BUS_VTABLE_END; v++) {
+ if (v->type != _SD_BUS_VTABLE_PROPERTY && v->type != _SD_BUS_VTABLE_WRITABLE_PROPERTY)
+ continue;
+
+ r = sd_bus_message_open_container(reply, 'e', "sv");
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_append(reply, "s", c->interface);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_open_container(reply, 'v', v->property.signature);
+ if (r < 0)
+ return r;
+
+ r = invoke_property_get(bus, v, path, c->interface, v->property.member, reply, error, vtable_property_convert_userdata(v, userdata));
+ if (r < 0)
+ return r;
+
+ if (sd_bus_error_is_set(error))
+ return 0;
+
+ r = sd_bus_message_close_container(reply);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_close_container(reply);
+ if (r < 0)
+ return r;
+ }
+
+ return 1;
+}
+
+static int property_get_all_callbacks_run(
+ sd_bus *bus,
+ sd_bus_message *m,
+ struct node_vtable *first,
+ bool require_fallback,
+ const char *iface,
+ bool *found_object) {
+
+ _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
+ struct node_vtable *c;
+ bool found_interface = false;
+ int r;
+
+ assert(bus);
+ assert(m);
+ assert(found_object);
+
+ r = sd_bus_message_new_method_return(bus, m, &reply);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_open_container(reply, 'a', "{sv}");
+ if (r < 0)
+ return r;
+
+ LIST_FOREACH(vtables, c, first) {
+ _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
+ void *u;
+
+ if (require_fallback && !c->is_fallback)
+ continue;
+
+ r = node_vtable_get_userdata(bus, m->path, c, &u);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ continue;
+
+ *found_object = true;
+
+ if (iface && !streq(c->interface, iface))
+ continue;
+ found_interface = true;
+
+ c->last_iteration = bus->iteration_counter;
+
+ r = vtable_append_all_properties(bus, reply, m->path, c, u, &error);
+ if (r < 0)
+ return r;
+
+ if (sd_bus_error_is_set(&error)) {
+ r = sd_bus_reply_method_error(bus, m, &error);
+ if (r < 0)
+ return r;
+
+ return 1;
+ }
+ }
+
+ if (!found_interface) {
+ r = sd_bus_reply_method_errorf(
+ bus, m,
+ "org.freedesktop.DBus.Error.UnknownInterface",
+ "Unknown interface '%s'.", iface);
+ if (r < 0)
+ return r;
+
+ return 1;
+ }
+
+ r = sd_bus_message_close_container(reply);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_send(bus, reply, NULL);
+ if (r < 0)
+ return r;
+
+ return 1;
+}
+
+static bool bus_node_with_object_manager(sd_bus *bus, struct node *n) {
+ assert(bus);
+
+ if (n->object_manager)
+ return true;
+
+ if (n->parent)
+ return bus_node_with_object_manager(bus, n->parent);
+
+ return false;
+}
+
+static bool bus_node_exists(sd_bus *bus, struct node *n, const char *path, bool require_fallback) {
+ struct node_vtable *c;
+ struct node_callback *k;
+
+ assert(bus);
+ assert(n);
+
+ /* Tests if there's anything attached directly to this node
+ * for the specified path */
+
+ LIST_FOREACH(callbacks, k, n->callbacks) {
+ if (require_fallback && !k->is_fallback)
+ continue;
+
+ return true;
+ }
+
+ LIST_FOREACH(vtables, c, n->vtables) {
+
+ if (require_fallback && !c->is_fallback)
+ continue;
+
+ if (node_vtable_get_userdata(bus, path, c, NULL) > 0)
+ return true;
+ }
+
+ return !require_fallback && (n->enumerators || n->object_manager);
+}
+
+static int process_introspect(
+ sd_bus *bus,
+ sd_bus_message *m,
+ struct node *n,
+ bool require_fallback,
+ bool *found_object) {
+
+ _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
+ _cleanup_set_free_free_ Set *s = NULL;
+ struct introspect intro;
+ struct node_vtable *c;
+ bool empty;
+ int r;
+
+ assert(bus);
+ assert(m);
+ assert(n);
+ assert(found_object);
+
+ r = get_child_nodes(bus, m->path, n, &s);
+ if (r < 0)
+ return r;
+
+ r = introspect_begin(&intro);
+ if (r < 0)
+ return r;
+
+ r = introspect_write_default_interfaces(&intro, bus_node_with_object_manager(bus, n));
+ if (r < 0)
+ return r;
+
+ empty = set_isempty(s);
+
+ LIST_FOREACH(vtables, c, n->vtables) {
+ if (require_fallback && !c->is_fallback)
+ continue;
+
+ r = node_vtable_get_userdata(bus, m->path, c, NULL);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ continue;
+
+ empty = false;
+
+ r = introspect_write_interface(&intro, c->interface, c->vtable);
+ if (r < 0)
+ goto finish;
+ }
+
+ if (empty) {
+ /* Nothing?, let's see if we exist at all, and if not
+ * refuse to do anything */
+ r = bus_node_exists(bus, n, m->path, require_fallback);
+ if (r < 0)
+ return r;
+
+ if (r == 0)
+ goto finish;
+ }
+
+ *found_object = true;
+
+ r = introspect_write_child_nodes(&intro, s, m->path);
+ if (r < 0)
+ goto finish;
+
+ r = introspect_finish(&intro, bus, m, &reply);
+ if (r < 0)
+ goto finish;
+
+ r = sd_bus_send(bus, reply, NULL);
+ if (r < 0)
+ goto finish;
+
+ r = 1;
+
+finish:
+ introspect_free(&intro);
+ return r;
+}
+
+static int object_manager_serialize_vtable(
+ sd_bus *bus,
+ sd_bus_message *reply,
+ const char *path,
+ struct node_vtable *c,
+ sd_bus_error *error) {
+
+ void *u;
+ int r;
+
+ assert(bus);
+ assert(reply);
+ assert(path);
+ assert(c);
+ assert(error);
+
+ r = node_vtable_get_userdata(bus, path, c, &u);
+ if (r <= 0)
+ return r;
+
+ r = sd_bus_message_open_container(reply, 'e', "sa{sv}");
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_append(reply, "s", c->interface);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_open_container(reply, 'a', "{sv}");
+ if (r < 0)
+ return r;
+
+ r = vtable_append_all_properties(bus, reply, path, c, u, error);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_close_container(reply);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_close_container(reply);
+ if (r < 0)
+ return r;
+
+ return 0;
+}
+
+static int object_manager_serialize_path(
+ sd_bus *bus,
+ sd_bus_message *reply,
+ const char *prefix,
+ const char *path,
+ bool require_fallback,
+ sd_bus_error *error) {
+
+ struct node_vtable *i;
+ struct node *n;
+ int r;
+
+ assert(bus);
+ assert(reply);
+ assert(prefix);
+ assert(path);
+ assert(error);
+
+ n = hashmap_get(bus->nodes, prefix);
+ if (!n)
+ return 0;
+
+ r = sd_bus_message_open_container(reply, 'e', "oa{sa{sv}}");
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_append(reply, "o", path);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_open_container(reply, 'a', "{sa{sv}}");
+ if (r < 0)
+ return r;
+
+ LIST_FOREACH(vtables, i, n->vtables) {
+
+ if (require_fallback && !i->is_fallback)
+ continue;
+
+ r = object_manager_serialize_vtable(bus, reply, path, i, error);
+ if (r < 0)
+ return r;
+ if (sd_bus_error_is_set(error))
+ return 0;
+ }
+
+ r = sd_bus_message_close_container(reply);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_close_container(reply);
+ if (r < 0)
+ return r;
+
+ return 1;
+}
+
+static int object_manager_serialize_path_and_fallbacks(
+ sd_bus *bus,
+ sd_bus_message *reply,
+ const char *path,
+ sd_bus_error *error) {
+
+ size_t pl;
+ int r;
+
+ assert(bus);
+ assert(reply);
+ assert(path);
+ assert(error);
+
+ /* First, add all vtables registered for this path */
+ r = object_manager_serialize_path(bus, reply, path, path, false, error);
+ if (r < 0)
+ return r;
+ if (sd_bus_error_is_set(error))
+ return 0;
+
+ /* Second, add fallback vtables registered for any of the prefixes */
+ pl = strlen(path);
+ if (pl > 1) {
+ char p[pl + 1];
+ strcpy(p, path);
+
+ for (;;) {
+ char *e;
+
+ e = strrchr(p, '/');
+ if (e == p || !e)
+ break;
+
+ *e = 0;
+
+ r = object_manager_serialize_path(bus, reply, p, path, true, error);
+ if (r < 0)
+ return r;
+
+ if (sd_bus_error_is_set(error))
+ return 0;
+ }
+ }
+
+ return 0;
+}
+
+static int process_get_managed_objects(
+ sd_bus *bus,
+ sd_bus_message *m,
+ struct node *n,
+ bool require_fallback,
+ bool *found_object) {
+
+ _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
+ _cleanup_set_free_free_ Set *s = NULL;
+ bool empty;
+ int r;
+
+ assert(bus);
+ assert(m);
+ assert(n);
+ assert(found_object);
+
+ if (!bus_node_with_object_manager(bus, n))
+ return 0;
+
+ r = get_child_nodes(bus, m->path, n, &s);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_new_method_return(bus, m, &reply);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_open_container(reply, 'a', "{oa{sa{sv}}}");
+ if (r < 0)
+ return r;
+
+ empty = set_isempty(s);
+ if (empty) {
+ struct node_vtable *c;
+
+ /* Hmm, so we have no children? Then let's check
+ * whether we exist at all, i.e. whether at least one
+ * vtable exists. */
+
+ LIST_FOREACH(vtables, c, n->vtables) {
+
+ if (require_fallback && !c->is_fallback)
+ continue;
+
+ if (r < 0)
+ return r;
+ if (r == 0)
+ continue;
+
+ empty = false;
+ break;
+ }
+
+ if (empty)
+ return 0;
+ } else {
+ Iterator i;
+ char *path;
+
+ SET_FOREACH(path, s, i) {
+ _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
+
+ r = object_manager_serialize_path_and_fallbacks(bus, reply, path, &error);
+ if (r < 0)
+ return -ENOMEM;
+
+ if (sd_bus_error_is_set(&error)) {
+ r = sd_bus_reply_method_error(bus, m, &error);
+ if (r < 0)
+ return r;
+
+ return 1;
+ }
+ }
+ }
+
+ r = sd_bus_message_close_container(reply);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_send(bus, reply, NULL);
+ if (r < 0)
+ return r;
+
+ return 1;
+}
+
+static int object_find_and_run(
+ sd_bus *bus,
+ sd_bus_message *m,
+ const char *p,
+ bool require_fallback,
+ bool *found_object) {
+
+ struct node *n;
+ struct vtable_member vtable_key, *v;
+ int r;
+
+ assert(bus);
+ assert(m);
+ assert(p);
+ assert(found_object);
+
+ n = hashmap_get(bus->nodes, p);
+ if (!n)
+ return 0;
+
+ /* First, try object callbacks */
+ r = node_callbacks_run(bus, m, n->callbacks, require_fallback, found_object);
+ if (r != 0)
+ return r;
+
+ if (!m->interface || !m->member)
+ return 0;
+
+ /* Then, look for a known method */
+ vtable_key.path = (char*) p;
+ vtable_key.interface = m->interface;
+ vtable_key.member = m->member;
+
+ v = hashmap_get(bus->vtable_methods, &vtable_key);
+ if (v) {
+ r = method_callbacks_run(bus, m, v, require_fallback, found_object);
+ if (r != 0)
+ return r;
+ }
+
+ /* Then, look for a known property */
+ if (streq(m->interface, "org.freedesktop.DBus.Properties")) {
+ bool get = false;
+
+ get = streq(m->member, "Get");
+
+ if (get || streq(m->member, "Set")) {
+
+ r = sd_bus_message_rewind(m, true);
+ if (r < 0)
+ return r;
+
+ vtable_key.path = (char*) p;
+
+ r = sd_bus_message_read(m, "ss", &vtable_key.interface, &vtable_key.member);
+ if (r < 0)
+ return r;
+
+ v = hashmap_get(bus->vtable_properties, &vtable_key);
+ if (v) {
+ r = property_get_set_callbacks_run(bus, m, v, require_fallback, get, found_object);
+ if (r != 0)
+ return r;
+ }
+
+ } else if (streq(m->member, "GetAll")) {
+ const char *iface;
+
+ r = sd_bus_message_rewind(m, true);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_read(m, "s", &iface);
+ if (r < 0)
+ return r;
+
+ if (iface[0] == 0)
+ iface = NULL;
+
+ r = property_get_all_callbacks_run(bus, m, n->vtables, require_fallback, iface, found_object);
+ if (r != 0)
+ return r;
+ }
+
+ } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus.Introspectable", "Introspect")) {
+
+ r = process_introspect(bus, m, n, require_fallback, found_object);
+ if (r != 0)
+ return r;
+
+ } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus.ObjectManager", "GetManagedObjects")) {
+
+ r = process_get_managed_objects(bus, m, n, require_fallback, found_object);
+ if (r != 0)
+ return r;
+ }
+
+ if (!*found_object) {
+ r = bus_node_exists(bus, n, m->path, require_fallback);
+ if (r < 0)
+ return r;
+
+ if (r > 0)
+ *found_object = true;
+ }
+
+ return 0;
+}
+
+int bus_process_object(sd_bus *bus, sd_bus_message *m) {
+ int r;
+ size_t pl;
+ bool found_object = false;
+
+ assert(bus);
+ assert(m);
+
+ if (m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_CALL)
+ return 0;
+
+ if (!m->path)
+ return 0;
+
+ if (hashmap_isempty(bus->nodes))
+ return 0;
+
+ pl = strlen(m->path);
+ do {
+ char p[pl+1];
+
+ bus->nodes_modified = false;
+
+ r = object_find_and_run(bus, m, m->path, false, &found_object);
+ if (r != 0)
+ return r;
+
+ /* Look for fallback prefixes */
+ strcpy(p, m->path);
+ for (;;) {
+ char *e;
+
+ if (streq(p, "/"))
+ break;
+
+ if (bus->nodes_modified)
+ break;
+
+ e = strrchr(p, '/');
+ assert(e);
+ if (e == p)
+ *(e+1) = 0;
+ else
+ *e = 0;
+
+ r = object_find_and_run(bus, m, p, true, &found_object);
+ if (r != 0)
+ return r;
+ }
+
+ } while (bus->nodes_modified);
+
+ if (!found_object)
+ return 0;
+
+ if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus.Properties", "Get") ||
+ sd_bus_message_is_method_call(m, "org.freedesktop.DBus.Properties", "Set"))
+ r = sd_bus_reply_method_errorf(
+ bus, m,
+ "org.freedesktop.DBus.Error.UnknownProperty",
+ "Unknown property or interface.");
+ else
+ r = sd_bus_reply_method_errorf(
+ bus, m,
+ "org.freedesktop.DBus.Error.UnknownMethod",
+ "Unknown method '%s' or interface '%s'.", m->member, m->interface);
+
+ if (r < 0)
+ return r;
+
+ return 1;
+}
+
+static struct node *bus_node_allocate(sd_bus *bus, const char *path) {
+ struct node *n, *parent;
+ const char *e;
+ char *s, *p;
+ int r;
+
+ assert(bus);
+ assert(path);
+ assert(path[0] == '/');
+
+ n = hashmap_get(bus->nodes, path);
+ if (n)
+ return n;
+
+ r = hashmap_ensure_allocated(&bus->nodes, string_hash_func, string_compare_func);
+ if (r < 0)
+ return NULL;
+
+ s = strdup(path);
+ if (!s)
+ return NULL;
+
+ if (streq(path, "/"))
+ parent = NULL;
+ else {
+ e = strrchr(path, '/');
+ assert(e);
+
+ p = strndupa(path, MAX(1, path - e));
+
+ parent = bus_node_allocate(bus, p);
+ if (!parent) {
+ free(s);
+ return NULL;
+ }
+ }
+
+ n = new0(struct node, 1);
+ if (!n)
+ return NULL;
+
+ n->parent = parent;
+ n->path = s;
+
+ r = hashmap_put(bus->nodes, s, n);
+ if (r < 0) {
+ free(s);
+ free(n);
+ return NULL;
+ }
+
+ if (parent)
+ LIST_PREPEND(struct node, siblings, parent->child, n);
+
+ return n;
+}
+
+static void bus_node_gc(sd_bus *b, struct node *n) {
+ assert(b);
+
+ if (!n)
+ return;
+
+ if (n->child ||
+ n->callbacks ||
+ n->vtables ||
+ n->enumerators ||
+ n->object_manager)
+ return;
+
+ assert(hashmap_remove(b->nodes, n->path) == n);
+
+ if (n->parent)
+ LIST_REMOVE(struct node, siblings, n->parent->child, n);
+
+ free(n->path);
+ bus_node_gc(b, n->parent);
+ free(n);
+}
+
+static int bus_add_object(
+ sd_bus *b,
+ bool fallback,
+ const char *path,
+ sd_bus_message_handler_t callback,
+ void *userdata) {
+
+ struct node_callback *c;
+ struct node *n;
+ int r;
+
+ if (!b)
+ return -EINVAL;
+ if (!object_path_is_valid(path))
+ return -EINVAL;
+ if (!callback)
+ return -EINVAL;
+ if (bus_pid_changed(b))
+ return -ECHILD;
+
+ n = bus_node_allocate(b, path);
+ if (!n)
+ return -ENOMEM;
+
+ c = new0(struct node_callback, 1);
+ if (!c) {
+ r = -ENOMEM;
+ goto fail;
+ }
+
+ c->node = n;
+ c->callback = callback;
+ c->userdata = userdata;
+ c->is_fallback = fallback;
+
+ LIST_PREPEND(struct node_callback, callbacks, n->callbacks, c);
+ return 0;
+
+fail:
+ free(c);
+ bus_node_gc(b, n);
+ return r;
+}
+
+static int bus_remove_object(
+ sd_bus *bus,
+ bool fallback,
+ const char *path,
+ sd_bus_message_handler_t callback,
+ void *userdata) {
+
+ struct node_callback *c;
+ struct node *n;
+
+ if (!bus)
+ return -EINVAL;
+ if (!object_path_is_valid(path))
+ return -EINVAL;
+ if (!callback)
+ return -EINVAL;
+ if (bus_pid_changed(bus))
+ return -ECHILD;
+
+ n = hashmap_get(bus->nodes, path);
+ if (!n)
+ return 0;
+
+ LIST_FOREACH(callbacks, c, n->callbacks)
+ if (c->callback == callback && c->userdata == userdata && c->is_fallback == fallback)
+ break;
+ if (!c)
+ return 0;
+
+ LIST_REMOVE(struct node_callback, callbacks, n->callbacks, c);
+ free(c);
+
+ bus_node_gc(bus, n);
+
+ return 1;
+}
+
+int sd_bus_add_object(sd_bus *bus, const char *path, sd_bus_message_handler_t callback, void *userdata) {
+ return bus_add_object(bus, false, path, callback, userdata);
+}
+
+int sd_bus_remove_object(sd_bus *bus, const char *path, sd_bus_message_handler_t callback, void *userdata) {
+ return bus_remove_object(bus, false, path, callback, userdata);
+}
+
+int sd_bus_add_fallback(sd_bus *bus, const char *prefix, sd_bus_message_handler_t callback, void *userdata) {
+ return bus_add_object(bus, true, prefix, callback, userdata);
+}
+
+int sd_bus_remove_fallback(sd_bus *bus, const char *prefix, sd_bus_message_handler_t callback, void *userdata) {
+ return bus_remove_object(bus, true, prefix, callback, userdata);
+}
+
+static void free_node_vtable(sd_bus *bus, struct node_vtable *w) {
+ assert(bus);
+
+ if (!w)
+ return;
+
+ if (w->interface && w->node && w->vtable) {
+ const sd_bus_vtable *v;
+
+ for (v = w->vtable; v->type != _SD_BUS_VTABLE_END; v++) {
+ struct vtable_member *x = NULL;
+
+ switch (v->type) {
+
+ case _SD_BUS_VTABLE_METHOD: {
+ struct vtable_member key;
+
+ key.path = w->node->path;
+ key.interface = w->interface;
+ key.member = v->method.member;
+
+ x = hashmap_remove(bus->vtable_methods, &key);
+ break;
+ }
+
+ case _SD_BUS_VTABLE_PROPERTY:
+ case _SD_BUS_VTABLE_WRITABLE_PROPERTY: {
+ struct vtable_member key;
+
+ key.path = w->node->path;
+ key.interface = w->interface;
+ key.member = v->property.member;
+ x = hashmap_remove(bus->vtable_properties, &key);
+ break;
+ }}
+
+ free(x);
+ }
+ }
+
+ free(w->interface);
+ free(w);
+}
+
+static unsigned vtable_member_hash_func(const void *a) {
+ const struct vtable_member *m = a;
+
+ return
+ string_hash_func(m->path) ^
+ string_hash_func(m->interface) ^
+ string_hash_func(m->member);
+}
+
+static int vtable_member_compare_func(const void *a, const void *b) {
+ const struct vtable_member *x = a, *y = b;
+ int r;
+
+ r = strcmp(x->path, y->path);
+ if (r != 0)
+ return r;
+
+ r = strcmp(x->interface, y->interface);
+ if (r != 0)
+ return r;
+
+ return strcmp(x->member, y->member);
+}
+
+static int add_object_vtable_internal(
+ sd_bus *bus,
+ const char *path,
+ const char *interface,
+ const sd_bus_vtable *vtable,
+ bool fallback,
+ sd_bus_object_find_t find,
+ void *userdata) {
+
+ struct node_vtable *c = NULL, *i;
+ const sd_bus_vtable *v;
+ struct node *n;
+ int r;
+
+ if (!bus)
+ return -EINVAL;
+ if (!object_path_is_valid(path))
+ return -EINVAL;
+ if (!interface_name_is_valid(interface))
+ return -EINVAL;
+ if (!vtable || vtable[0].type != _SD_BUS_VTABLE_START || vtable[0].start.element_size != sizeof(struct sd_bus_vtable))
+ return -EINVAL;
+ if (bus_pid_changed(bus))
+ return -ECHILD;
+
+ r = hashmap_ensure_allocated(&bus->vtable_methods, vtable_member_hash_func, vtable_member_compare_func);
+ if (r < 0)
+ return r;
+
+ r = hashmap_ensure_allocated(&bus->vtable_properties, vtable_member_hash_func, vtable_member_compare_func);
+ if (r < 0)
+ return r;
+
+ n = bus_node_allocate(bus, path);
+ if (!n)
+ return -ENOMEM;
+
+ LIST_FOREACH(vtables, i, n->vtables) {
+ if (streq(i->interface, interface)) {
+ r = -EEXIST;
+ goto fail;
+ }
+
+ if (i->is_fallback != fallback) {
+ r = -EPROTOTYPE;
+ goto fail;
+ }
+ }
+
+ c = new0(struct node_vtable, 1);
+ if (!c) {
+ r = -ENOMEM;
+ goto fail;
+ }
+
+ c->node = n;
+ c->is_fallback = fallback;
+ c->vtable = vtable;
+ c->userdata = userdata;
+ c->find = find;
+
+ c->interface = strdup(interface);
+ if (!c->interface) {
+ r = -ENOMEM;
+ goto fail;
+ }
+
+ for (v = c->vtable+1; v->type != _SD_BUS_VTABLE_END; v++) {
+
+ switch (v->type) {
+
+ case _SD_BUS_VTABLE_METHOD: {
+ struct vtable_member *m;
+
+ if (!member_name_is_valid(v->method.member) ||
+ !signature_is_valid(strempty(v->method.signature), false) ||
+ !signature_is_valid(strempty(v->method.result), false) ||
+ !(v->method.handler || (isempty(v->method.signature) && isempty(v->method.result))) ||
+ v->flags & (SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE|SD_BUS_VTABLE_PROPERTY_INVALIDATE_ONLY)) {
+ r = -EINVAL;
+ goto fail;
+ }
+
+ m = new0(struct vtable_member, 1);
+ if (!m) {
+ r = -ENOMEM;
+ goto fail;
+ }
+
+ m->parent = c;
+ m->path = n->path;
+ m->interface = c->interface;
+ m->member = v->method.member;
+ m->vtable = v;
+
+ r = hashmap_put(bus->vtable_methods, m, m);
+ if (r < 0) {
+ free(m);
+ goto fail;
+ }
+
+ break;
+ }
+
+ case _SD_BUS_VTABLE_WRITABLE_PROPERTY:
+
+ if (!(v->property.set || bus_type_is_basic(v->property.signature[0]))) {
+ r = -EINVAL;
+ goto fail;
+ }
+
+ /* Fall through */
+
+ case _SD_BUS_VTABLE_PROPERTY: {
+ struct vtable_member *m;
+
+ if (!member_name_is_valid(v->property.member) ||
+ !signature_is_single(v->property.signature, false) ||
+ !(v->property.get || bus_type_is_basic(v->property.signature[0])) ||
+ v->flags & SD_BUS_VTABLE_METHOD_NO_REPLY ||
+ (v->flags & SD_BUS_VTABLE_PROPERTY_INVALIDATE_ONLY && !(v->flags & SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE))) {
+ r = -EINVAL;
+ goto fail;
+ }
+
+
+ m = new0(struct vtable_member, 1);
+ if (!m) {
+ r = -ENOMEM;
+ goto fail;
+ }
+
+ m->parent = c;
+ m->path = n->path;
+ m->interface = c->interface;
+ m->member = v->property.member;
+ m->vtable = v;
+
+ r = hashmap_put(bus->vtable_properties, m, m);
+ if (r < 0) {
+ free(m);
+ goto fail;
+ }
+
+ break;
+ }
+
+ case _SD_BUS_VTABLE_SIGNAL:
+
+ if (!member_name_is_valid(v->signal.member) ||
+ !signature_is_single(strempty(v->signal.signature), false)) {
+ r = -EINVAL;
+ goto fail;
+ }
+
+ break;
+
+ default:
+ r = -EINVAL;
+ goto fail;
+ }
+ }
+
+ LIST_PREPEND(struct node_vtable, vtables, n->vtables, c);
+ return 0;
+
+fail:
+ if (c)
+ free_node_vtable(bus, c);
+
+ bus_node_gc(bus, n);
+ return r;
+}
+
+static int remove_object_vtable_internal(
+ sd_bus *bus,
+ const char *path,
+ const char *interface,
+ bool fallback) {
+
+ struct node_vtable *c;
+ struct node *n;
+
+ if (!bus)
+ return -EINVAL;
+ if (!object_path_is_valid(path))
+ return -EINVAL;
+ if (!interface_name_is_valid(interface))
+ return -EINVAL;
+ if (bus_pid_changed(bus))
+ return -ECHILD;
+
+ n = hashmap_get(bus->nodes, path);
+ if (!n)
+ return 0;
+
+ LIST_FOREACH(vtables, c, n->vtables)
+ if (streq(c->interface, interface) && c->is_fallback == fallback)
+ break;
+
+ if (!c)
+ return 0;
+
+ LIST_REMOVE(struct node_vtable, vtables, n->vtables, c);
+
+ free_node_vtable(bus, c);
+ return 1;
+}
+
+int sd_bus_add_object_vtable(
+ sd_bus *bus,
+ const char *path,
+ const char *interface,
+ const sd_bus_vtable *vtable,
+ void *userdata) {
+
+ return add_object_vtable_internal(bus, path, interface, vtable, false, NULL, userdata);
+}
+
+int sd_bus_remove_object_vtable(
+ sd_bus *bus,
+ const char *path,
+ const char *interface) {
+
+ return remove_object_vtable_internal(bus, path, interface, false);
+}
+
+int sd_bus_add_fallback_vtable(
+ sd_bus *bus,
+ const char *path,
+ const char *interface,
+ const sd_bus_vtable *vtable,
+ sd_bus_object_find_t find,
+ void *userdata) {
+
+ return add_object_vtable_internal(bus, path, interface, vtable, true, find, userdata);
+}
+
+int sd_bus_remove_fallback_vtable(
+ sd_bus *bus,
+ const char *path,
+ const char *interface) {
+
+ return remove_object_vtable_internal(bus, path, interface, true);
+}
+
+int sd_bus_add_node_enumerator(
+ sd_bus *bus,
+ const char *path,
+ sd_bus_node_enumerator_t callback,
+ void *userdata) {
+
+ struct node_enumerator *c;
+ struct node *n;
+ int r;
+
+ if (!bus)
+ return -EINVAL;
+ if (!object_path_is_valid(path))
+ return -EINVAL;
+ if (!callback)
+ return -EINVAL;
+ if (bus_pid_changed(bus))
+ return -ECHILD;
+
+ n = bus_node_allocate(bus, path);
+ if (!n)
+ return -ENOMEM;
+
+ c = new0(struct node_enumerator, 1);
+ if (!c) {
+ r = -ENOMEM;
+ goto fail;
+ }
+
+ c->node = n;
+ c->callback = callback;
+ c->userdata = userdata;
+
+ LIST_PREPEND(struct node_enumerator, enumerators, n->enumerators, c);
+ return 0;
+
+fail:
+ free(c);
+ bus_node_gc(bus, n);
+ return r;
+}
+
+int sd_bus_remove_node_enumerator(
+ sd_bus *bus,
+ const char *path,
+ sd_bus_node_enumerator_t callback,
+ void *userdata) {
+
+ struct node_enumerator *c;
+ struct node *n;
+
+ if (!bus)
+ return -EINVAL;
+ if (!object_path_is_valid(path))
+ return -EINVAL;
+ if (!callback)
+ return -EINVAL;
+ if (bus_pid_changed(bus))
+ return -ECHILD;
+
+ n = hashmap_get(bus->nodes, path);
+ if (!n)
+ return 0;
+
+ LIST_FOREACH(enumerators, c, n->enumerators)
+ if (c->callback == callback && c->userdata == userdata)
+ break;
+
+ if (!c)
+ return 0;
+
+ LIST_REMOVE(struct node_enumerator, enumerators, n->enumerators, c);
+ free(c);
+
+ bus_node_gc(bus, n);
+
+ return 1;
+}
+
+static int emit_properties_changed_on_interface(
+ sd_bus *bus,
+ const char *prefix,
+ const char *path,
+ const char *interface,
+ bool require_fallback,
+ char **names) {
+
+ _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
+ bool has_invalidating = false;
+ struct vtable_member key;
+ struct node_vtable *c;
+ struct node *n;
+ char **property;
+ void *u = NULL;
+ int r;
+
+ assert(bus);
+ assert(path);
+ assert(interface);
+
+ n = hashmap_get(bus->nodes, prefix);
+ if (!n)
+ return 0;
+
+ LIST_FOREACH(vtables, c, n->vtables) {
+ if (require_fallback && !c->is_fallback)
+ continue;
+
+ if (streq(c->interface, interface))
+ break;
+ }
+
+ if (!c)
+ return 0;
+
+ r = node_vtable_get_userdata(bus, path, c, &u);
+ if (r <= 0)
+ return r;
+
+ r = sd_bus_message_new_signal(bus, path, "org.freedesktop.DBus.Properties", "PropertiesChanged", &m);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_append(m, "s", interface);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_open_container(m, 'a', "{sv}");
+ if (r < 0)
+ return r;
+
+ key.path = prefix;
+ key.interface = interface;
+
+ STRV_FOREACH(property, names) {
+ _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
+ struct vtable_member *v;
+
+ key.member = *property;
+ v = hashmap_get(bus->vtable_properties, &key);
+ if (!v)
+ return -ENOENT;
+
+ assert(c == v->parent);
+
+ if (!(v->vtable->flags & SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE))
+ return -EDOM;
+ if (v->vtable->flags & SD_BUS_VTABLE_PROPERTY_INVALIDATE_ONLY) {
+ has_invalidating = true;
+ continue;
+ }
+
+ r = sd_bus_message_open_container(m, 'e', "sv");
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_append(m, "s", *property);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_open_container(m, 'v', v->vtable->property.signature);
+ if (r < 0)
+ return r;
+
+ r = invoke_property_get(bus, v->vtable, m->path, interface, *property, m, &error, vtable_property_convert_userdata(v->vtable, u));
+ if (r < 0)
+ return r;
+
+ if (sd_bus_error_is_set(&error))
+ return bus_error_to_errno(&error);
+
+ r = sd_bus_message_close_container(m);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_close_container(m);
+ if (r < 0)
+ return r;
+ }
+
+ r = sd_bus_message_close_container(m);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_open_container(m, 'a', "s");
+ if (r < 0)
+ return r;
+
+ if (has_invalidating) {
+ STRV_FOREACH(property, names) {
+ struct vtable_member *v;
+
+ key.member = *property;
+ assert_se(v = hashmap_get(bus->vtable_properties, &key));
+ assert(c == v->parent);
+
+ if (!(v->vtable->flags & SD_BUS_VTABLE_PROPERTY_INVALIDATE_ONLY))
+ continue;
+
+ r = sd_bus_message_append(m, "s", *property);
+ if (r < 0)
+ return r;
+ }
+ }
+
+ r = sd_bus_message_close_container(m);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_send(bus, m, NULL);
+ if (r < 0)
+ return r;
+
+ return 1;
+}
+
+int sd_bus_emit_properties_changed_strv(sd_bus *bus, const char *path, const char *interface, char **names) {
+ size_t pl;
+ int r;
+
+ if (!bus)
+ return -EINVAL;
+ if (!object_path_is_valid(path))
+ return -EINVAL;
+ if (!interface_name_is_valid(interface))
+ return -EINVAL;
+
+ r = emit_properties_changed_on_interface(bus, path, path, interface, false, names);
+ if (r != 0)
+ return r;
+
+ pl = strlen(path);
+ if (pl > 1 ) {
+ char p[pl+1];
+
+ strcpy(p, path);
+ for (;;) {
+ char *e;
+
+ if (streq(p, "/"))
+ break;
+
+ e = strrchr(p, '/');
+ assert(e);
+ if (e == p)
+ *(e+1) = 0;
+ else
+ *e = 0;
+
+ r = emit_properties_changed_on_interface(bus, p, path, interface, true, names);
+ if (r != 0)
+ return r;
+ }
+ }
+
+ return -ENOENT;
+}
+
+int sd_bus_emit_properties_changed(sd_bus *bus, const char *path, const char *interface, const char *name, ...) {
+ _cleanup_strv_free_ char **names = NULL;
+ va_list ap;
+
+ va_start(ap, name);
+ names = strv_new_ap(name, ap);
+ va_end(ap);
+
+ if (!names)
+ return -ENOMEM;
+
+ return sd_bus_emit_properties_changed_strv(bus, path, interface, names);
+}
+
+int sd_bus_emit_interfaces_added(sd_bus *bus, const char *path, const char *interfaces, ...) {
+ return -ENOSYS;
+}
+
+int sd_bus_emit_interfaces_removed(sd_bus *bus, const char *path, const char *interfaces, ...) {
+ return -ENOSYS;
+}
+
+int sd_bus_add_object_manager(sd_bus *bus, const char *path) {
+ struct node *n;
+
+ if (!bus)
+ return -EINVAL;
+ if (!object_path_is_valid(path))
+ return -EINVAL;
+ if (bus_pid_changed(bus))
+ return -ECHILD;
+
+ n = bus_node_allocate(bus, path);
+ if (!n)
+ return -ENOMEM;
+
+ n->object_manager = true;
+ return 0;
+}
+
+int sd_bus_remove_object_manager(sd_bus *bus, const char *path) {
+ struct node *n;
+
+ if (!bus)
+ return -EINVAL;
+ if (!object_path_is_valid(path))
+ return -EINVAL;
+ if (bus_pid_changed(bus))
+ return -ECHILD;
+
+ n = hashmap_get(bus->nodes, path);
+ if (!n)
+ return 0;
+
+ if (!n->object_manager)
+ return 0;
+
+ n->object_manager = false;
+ bus_node_gc(bus, n);
+ return 1;
+}
#include "bus-control.h"
#include "bus-introspect.h"
#include "bus-signature.h"
+#include "bus-objects.h"
static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec);
return 1;
}
-static int node_vtable_get_userdata(
- sd_bus *bus,
- const char *path,
- struct node_vtable *c,
- void **userdata) {
-
- void *u;
+static int process_message(sd_bus *bus, sd_bus_message *m) {
int r;
assert(bus);
- assert(path);
- assert(c);
-
- u = c->userdata;
- if (c->find) {
- r = c->find(bus, path, c->interface, &u, u);
- if (r <= 0)
- return r;
- }
-
- if (userdata)
- *userdata = u;
-
- return 1;
-}
+ assert(m);
-static void *vtable_property_convert_userdata(const sd_bus_vtable *p, void *u) {
- assert(p);
+ bus->iteration_counter++;
- return (uint8_t*) u + p->property.offset;
-}
+ r = process_hello(bus, m);
+ if (r != 0)
+ return r;
-static int vtable_property_get_userdata(
- sd_bus *bus,
- const char *path,
- struct vtable_member *p,
- void **userdata) {
+ r = process_reply(bus, m);
+ if (r != 0)
+ return r;
- void *u;
- int r;
+ r = process_filter(bus, m);
+ if (r != 0)
+ return r;
- assert(bus);
- assert(path);
- assert(p);
- assert(userdata);
+ r = process_match(bus, m);
+ if (r != 0)
+ return r;
- r = node_vtable_get_userdata(bus, path, p->parent, &u);
- if (r <= 0)
+ r = process_builtin(bus, m);
+ if (r != 0)
return r;
- *userdata = vtable_property_convert_userdata(p->vtable, u);
- return 1;
+ return bus_process_object(bus, m);
}
-static int add_enumerated_to_set(sd_bus *bus, const char *prefix, struct node_enumerator *first, Set *s) {
- struct node_enumerator *c;
+static int process_running(sd_bus *bus, sd_bus_message **ret) {
+ _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
int r;
assert(bus);
- assert(prefix);
- assert(s);
-
- LIST_FOREACH(enumerators, c, first) {
- char **children = NULL, **k;
+ assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO);
- r = c->callback(bus, prefix, &children, c->userdata);
- if (r < 0)
- return r;
+ r = process_timeout(bus);
+ if (r != 0)
+ goto null_message;
- STRV_FOREACH(k, children) {
- if (r < 0) {
- free(*k);
- continue;
- }
+ r = dispatch_wqueue(bus);
+ if (r != 0)
+ goto null_message;
- if (!object_path_is_valid(*k) && object_path_startswith(*k, prefix)) {
- free(*k);
- r = -EINVAL;
- continue;
- }
+ r = dispatch_rqueue(bus, &m);
+ if (r < 0)
+ return r;
+ if (!m)
+ goto null_message;
- r = set_consume(s, *k);
- }
+ r = process_message(bus, m);
+ if (r != 0)
+ goto null_message;
- free(children);
+ if (ret) {
+ r = sd_bus_message_rewind(m, true);
if (r < 0)
return r;
- }
-
- return 0;
-}
-
-static int add_subtree_to_set(sd_bus *bus, const char *prefix, struct node *n, Set *s) {
- struct node *i;
- int r;
-
- assert(bus);
- assert(prefix);
- assert(n);
- assert(s);
-
- r = add_enumerated_to_set(bus, prefix, n->enumerators, s);
- if (r < 0)
- return r;
- LIST_FOREACH(siblings, i, n->child) {
- char *t;
-
- t = strdup(i->path);
- if (!t)
- return -ENOMEM;
+ *ret = m;
+ m = NULL;
+ return 1;
+ }
- r = set_consume(s, t);
- if (r < 0 && r != -EEXIST)
- return r;
+ if (m->header->type == SD_BUS_MESSAGE_TYPE_METHOD_CALL) {
- r = add_subtree_to_set(bus, prefix, i, s);
+ r = sd_bus_reply_method_errorf(
+ bus, m,
+ "org.freedesktop.DBus.Error.UnknownObject",
+ "Unknown object '%s'.", m->path);
if (r < 0)
return r;
}
- return 0;
-}
-
-static int get_child_nodes(sd_bus *bus, const char *prefix, struct node *n, Set **_s) {
- Set *s = NULL;
- int r;
-
- assert(bus);
- assert(n);
- assert(_s);
-
- s = set_new(string_hash_func, string_compare_func);
- if (!s)
- return -ENOMEM;
+ return 1;
- r = add_subtree_to_set(bus, prefix, n, s);
- if (r < 0) {
- set_free_free(s);
- return r;
- }
+null_message:
+ if (r >= 0 && ret)
+ *ret = NULL;
- *_s = s;
- return 0;
+ return r;
}
-static int node_callbacks_run(
- sd_bus *bus,
- sd_bus_message *m,
- struct node_callback *first,
- bool require_fallback,
- bool *found_object) {
-
- struct node_callback *c;
+int sd_bus_process(sd_bus *bus, sd_bus_message **ret) {
int r;
- assert(bus);
- assert(m);
- assert(found_object);
+ /* Returns 0 when we didn't do anything. This should cause the
+ * caller to invoke sd_bus_wait() before returning the next
+ * time. Returns > 0 when we did something, which possibly
+ * means *ret is filled in with an unprocessed message. */
- LIST_FOREACH(callbacks, c, first) {
- if (require_fallback && !c->is_fallback)
- continue;
+ if (!bus)
+ return -EINVAL;
+ if (bus_pid_changed(bus))
+ return -ECHILD;
- *found_object = true;
+ /* We don't allow recursively invoking sd_bus_process(). */
+ if (bus->processing)
+ return -EBUSY;
- if (c->last_iteration == bus->iteration_counter)
- continue;
+ switch (bus->state) {
- r = sd_bus_message_rewind(m, true);
- if (r < 0)
- return r;
+ case BUS_UNSET:
+ case BUS_CLOSED:
+ return -ENOTCONN;
- r = c->callback(bus, m, c->userdata);
- if (r != 0)
+ case BUS_OPENING:
+ r = bus_socket_process_opening(bus);
+ if (r < 0)
return r;
- }
-
- return 0;
-}
-
-static int method_callbacks_run(
- sd_bus *bus,
- sd_bus_message *m,
- struct vtable_member *c,
- bool require_fallback,
- bool *found_object) {
-
- const char *signature;
- void *u;
- int r;
-
- assert(bus);
- assert(m);
- assert(c);
- assert(found_object);
-
- if (require_fallback && !c->parent->is_fallback)
- return 0;
-
- r = node_vtable_get_userdata(bus, m->path, c->parent, &u);
- if (r <= 0)
- return r;
-
- *found_object = true;
-
- r = sd_bus_message_rewind(m, true);
- if (r < 0)
+ if (ret)
+ *ret = NULL;
return r;
- r = sd_bus_message_get_signature(m, true, &signature);
- if (r < 0)
- return r;
+ case BUS_AUTHENTICATING:
- if (!streq(strempty(c->vtable->method.signature), signature)) {
- r = sd_bus_reply_method_errorf(bus, m,
- "org.freedesktop.DBus.Error.InvalidArgs",
- "Invalid arguments '%s' to call %s:%s, expecting '%s'.",
- signature, c->interface, c->member, strempty(c->vtable->method.signature));
+ r = bus_socket_process_authenticating(bus);
if (r < 0)
return r;
+ if (ret)
+ *ret = NULL;
+ return r;
- return 1;
- }
+ case BUS_RUNNING:
+ case BUS_HELLO:
- if (c->vtable->method.handler)
- return c->vtable->method.handler(bus, m, u);
+ bus->processing = true;
+ r = process_running(bus, ret);
+ bus->processing = false;
- /* If the method callback is NULL, make this a successful NOP */
- r = sd_bus_reply_method_return(bus, m, NULL);
- if (r < 0)
return r;
+ }
- return 1;
+ assert_not_reached("Unknown state");
}
-static int invoke_property_get(
- sd_bus *bus,
- const sd_bus_vtable *v,
- const char *path,
- const char *interface,
- const char *property,
- sd_bus_message *m,
- sd_bus_error *error,
- void *userdata) {
-
- int r;
- void *p;
+static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec) {
+ struct pollfd p[2] = {};
+ int r, e, n;
+ struct timespec ts;
+ usec_t until, m;
assert(bus);
- assert(v);
- if (v->property.get)
- return v->property.get(bus, path, interface, property, m, error, userdata);
+ if (!BUS_IS_OPEN(bus->state))
+ return -ENOTCONN;
- /* Automatic handling if no callback is defined. */
+ e = sd_bus_get_events(bus);
+ if (e < 0)
+ return e;
- assert(bus_type_is_basic(v->property.signature[0]));
+ if (need_more)
+ e |= POLLIN;
- switch (v->property.signature[0]) {
+ r = sd_bus_get_timeout(bus, &until);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ m = (uint64_t) -1;
+ else {
+ usec_t nw;
+ nw = now(CLOCK_MONOTONIC);
+ m = until > nw ? until - nw : 0;
+ }
- case SD_BUS_TYPE_STRING:
- case SD_BUS_TYPE_OBJECT_PATH:
- case SD_BUS_TYPE_SIGNATURE:
- p = *(char**) userdata;
- break;
+ if (timeout_usec != (uint64_t) -1 && (m == (uint64_t) -1 || timeout_usec < m))
+ m = timeout_usec;
- default:
- p = userdata;
- break;
+ p[0].fd = bus->input_fd;
+ if (bus->output_fd == bus->input_fd) {
+ p[0].events = e;
+ n = 1;
+ } else {
+ p[0].events = e & POLLIN;
+ p[1].fd = bus->output_fd;
+ p[1].events = e & POLLOUT;
+ n = 2;
}
- r = sd_bus_message_append_basic(m, v->property.signature[0], p);
+ r = ppoll(p, n, m == (uint64_t) -1 ? NULL : timespec_store(&ts, m), NULL);
if (r < 0)
- return r;
+ return -errno;
- return 1;
+ return r > 0 ? 1 : 0;
}
-static int invoke_property_set(
- sd_bus *bus,
- const sd_bus_vtable *v,
- const char *path,
- const char *interface,
- const char *property,
- sd_bus_message *value,
- sd_bus_error *error,
- void *userdata) {
+int sd_bus_wait(sd_bus *bus, uint64_t timeout_usec) {
- int r;
+ if (!bus)
+ return -EINVAL;
+ if (!BUS_IS_OPEN(bus->state))
+ return -ENOTCONN;
+ if (bus_pid_changed(bus))
+ return -ECHILD;
- assert(bus);
- assert(v);
+ if (bus->rqueue_size > 0)
+ return 0;
- if (v->property.set)
- return v->property.set(bus, path, interface, property, value, error, userdata);
+ return bus_poll(bus, false, timeout_usec);
+}
- /* Automatic handling if no callback is defined. */
+int sd_bus_flush(sd_bus *bus) {
+ int r;
- assert(signature_is_single(v->property.signature, false));
- assert(bus_type_is_basic(v->property.signature[0]));
+ if (!bus)
+ return -EINVAL;
+ if (!BUS_IS_OPEN(bus->state))
+ return -ENOTCONN;
+ if (bus_pid_changed(bus))
+ return -ECHILD;
- switch (v->property.signature[0]) {
+ r = bus_ensure_running(bus);
+ if (r < 0)
+ return r;
- case SD_BUS_TYPE_STRING:
- case SD_BUS_TYPE_OBJECT_PATH:
- case SD_BUS_TYPE_SIGNATURE: {
- const char *p;
- char *n;
+ if (bus->wqueue_size <= 0)
+ return 0;
- r = sd_bus_message_read_basic(value, v->property.signature[0], &p);
+ for (;;) {
+ r = dispatch_wqueue(bus);
if (r < 0)
return r;
- n = strdup(p);
- if (!n)
- return -ENOMEM;
-
- free(*(char**) userdata);
- *(char**) userdata = n;
-
- break;
- }
+ if (bus->wqueue_size <= 0)
+ return 0;
- default:
- r = sd_bus_message_read_basic(value, v->property.signature[0], userdata);
+ r = bus_poll(bus, false, (uint64_t) -1);
if (r < 0)
return r;
-
- break;
}
-
- return 1;
}
-static int property_get_set_callbacks_run(
- sd_bus *bus,
- sd_bus_message *m,
- struct vtable_member *c,
- bool require_fallback,
- bool is_get,
- bool *found_object) {
-
- _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
- _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
- void *u;
- int r;
-
- assert(bus);
- assert(m);
- assert(found_object);
-
- if (require_fallback && !c->parent->is_fallback)
- return 0;
-
- r = vtable_property_get_userdata(bus, m->path, c, &u);
- if (r <= 0)
- return r;
-
- *found_object = true;
-
- r = sd_bus_message_new_method_return(bus, m, &reply);
- if (r < 0)
- return r;
-
- c->last_iteration = bus->iteration_counter;
-
- if (is_get) {
- r = sd_bus_message_open_container(reply, 'v', c->vtable->property.signature);
- if (r < 0)
- return r;
-
- r = invoke_property_get(bus, c->vtable, m->path, c->interface, c->member, reply, &error, u);
- if (r < 0)
- return r;
-
- if (sd_bus_error_is_set(&error)) {
- r = sd_bus_reply_method_error(bus, m, &error);
- if (r < 0)
- return r;
-
- return 1;
- }
-
- r = sd_bus_message_close_container(reply);
- if (r < 0)
- return r;
-
- } else {
- if (c->vtable->type != _SD_BUS_VTABLE_WRITABLE_PROPERTY)
- sd_bus_error_setf(&error, "org.freedesktop.DBus.Error.PropertyReadOnly", "Property '%s' is not writable.", c->member);
- else {
- r = sd_bus_message_enter_container(m, 'v', c->vtable->property.signature);
- if (r < 0)
- return r;
-
- r = invoke_property_set(bus, c->vtable, m->path, c->interface, c->member, m, &error, u);
- if (r < 0)
- return r;
- }
-
- if (sd_bus_error_is_set(&error)) {
- r = sd_bus_reply_method_error(bus, m, &error);
- if (r < 0)
- return r;
-
- return 1;
- }
-
- r = sd_bus_message_exit_container(m);
- if (r < 0)
- return r;
- }
-
- r = sd_bus_send(bus, reply, NULL);
- if (r < 0)
- return r;
-
- return 1;
-}
-
-static int vtable_append_all_properties(
- sd_bus *bus,
- sd_bus_message *reply,
- const char *path,
- struct node_vtable *c,
- void *userdata,
- sd_bus_error *error) {
-
- const sd_bus_vtable *v;
- int r;
-
- assert(bus);
- assert(reply);
- assert(c);
-
- for (v = c->vtable+1; v->type != _SD_BUS_VTABLE_END; v++) {
- if (v->type != _SD_BUS_VTABLE_PROPERTY && v->type != _SD_BUS_VTABLE_WRITABLE_PROPERTY)
- continue;
-
- r = sd_bus_message_open_container(reply, 'e', "sv");
- if (r < 0)
- return r;
-
- r = sd_bus_message_append(reply, "s", c->interface);
- if (r < 0)
- return r;
-
- r = sd_bus_message_open_container(reply, 'v', v->property.signature);
- if (r < 0)
- return r;
-
- r = invoke_property_get(bus, v, path, c->interface, v->property.member, reply, error, vtable_property_convert_userdata(v, userdata));
- if (r < 0)
- return r;
-
- if (sd_bus_error_is_set(error))
- return 0;
-
- r = sd_bus_message_close_container(reply);
- if (r < 0)
- return r;
-
- r = sd_bus_message_close_container(reply);
- if (r < 0)
- return r;
- }
-
- return 1;
-}
-
-static int property_get_all_callbacks_run(
- sd_bus *bus,
- sd_bus_message *m,
- struct node_vtable *first,
- bool require_fallback,
- const char *iface,
- bool *found_object) {
-
- _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
- struct node_vtable *c;
- bool found_interface = false;
- int r;
-
- assert(bus);
- assert(m);
- assert(found_object);
-
- r = sd_bus_message_new_method_return(bus, m, &reply);
- if (r < 0)
- return r;
-
- r = sd_bus_message_open_container(reply, 'a', "{sv}");
- if (r < 0)
- return r;
-
- LIST_FOREACH(vtables, c, first) {
- _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
- void *u;
-
- if (require_fallback && !c->is_fallback)
- continue;
-
- r = node_vtable_get_userdata(bus, m->path, c, &u);
- if (r < 0)
- return r;
- if (r == 0)
- continue;
-
- *found_object = true;
-
- if (iface && !streq(c->interface, iface))
- continue;
- found_interface = true;
-
- c->last_iteration = bus->iteration_counter;
-
- r = vtable_append_all_properties(bus, reply, m->path, c, u, &error);
- if (r < 0)
- return r;
-
- if (sd_bus_error_is_set(&error)) {
- r = sd_bus_reply_method_error(bus, m, &error);
- if (r < 0)
- return r;
-
- return 1;
- }
- }
-
- if (!found_interface) {
- r = sd_bus_reply_method_errorf(
- bus, m,
- "org.freedesktop.DBus.Error.UnknownInterface",
- "Unknown interface '%s'.", iface);
- if (r < 0)
- return r;
-
- return 1;
- }
-
- r = sd_bus_message_close_container(reply);
- if (r < 0)
- return r;
-
- r = sd_bus_send(bus, reply, NULL);
- if (r < 0)
- return r;
-
- return 1;
-}
-
-static bool bus_node_with_object_manager(sd_bus *bus, struct node *n) {
- assert(bus);
-
- if (n->object_manager)
- return true;
-
- if (n->parent)
- return bus_node_with_object_manager(bus, n->parent);
-
- return false;
-}
-
-static bool bus_node_exists(sd_bus *bus, struct node *n, const char *path, bool require_fallback) {
- struct node_vtable *c;
- struct node_callback *k;
-
- assert(bus);
- assert(n);
-
- /* Tests if there's anything attached directly to this node
- * for the specified path */
-
- LIST_FOREACH(callbacks, k, n->callbacks) {
- if (require_fallback && !k->is_fallback)
- continue;
-
- return true;
- }
-
- LIST_FOREACH(vtables, c, n->vtables) {
-
- if (require_fallback && !c->is_fallback)
- continue;
-
- if (node_vtable_get_userdata(bus, path, c, NULL) > 0)
- return true;
- }
-
- return !require_fallback && (n->enumerators || n->object_manager);
-}
-
-static int process_introspect(
- sd_bus *bus,
- sd_bus_message *m,
- struct node *n,
- bool require_fallback,
- bool *found_object) {
-
- _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
- _cleanup_set_free_free_ Set *s = NULL;
- struct introspect intro;
- struct node_vtable *c;
- bool empty;
- int r;
-
- assert(bus);
- assert(m);
- assert(n);
- assert(found_object);
-
- r = get_child_nodes(bus, m->path, n, &s);
- if (r < 0)
- return r;
-
- r = introspect_begin(&intro);
- if (r < 0)
- return r;
-
- r = introspect_write_default_interfaces(&intro, bus_node_with_object_manager(bus, n));
- if (r < 0)
- return r;
-
- empty = set_isempty(s);
-
- LIST_FOREACH(vtables, c, n->vtables) {
- if (require_fallback && !c->is_fallback)
- continue;
-
- r = node_vtable_get_userdata(bus, m->path, c, NULL);
- if (r < 0)
- return r;
- if (r == 0)
- continue;
-
- empty = false;
-
- r = introspect_write_interface(&intro, c->interface, c->vtable);
- if (r < 0)
- goto finish;
- }
-
- if (empty) {
- /* Nothing?, let's see if we exist at all, and if not
- * refuse to do anything */
- r = bus_node_exists(bus, n, m->path, require_fallback);
- if (r < 0)
- return r;
-
- if (r == 0)
- goto finish;
- }
-
- *found_object = true;
-
- r = introspect_write_child_nodes(&intro, s, m->path);
- if (r < 0)
- goto finish;
-
- r = introspect_finish(&intro, bus, m, &reply);
- if (r < 0)
- goto finish;
-
- r = sd_bus_send(bus, reply, NULL);
- if (r < 0)
- goto finish;
-
- r = 1;
-
-finish:
- introspect_free(&intro);
- return r;
-}
-
-static int object_manager_serialize_vtable(
- sd_bus *bus,
- sd_bus_message *reply,
- const char *path,
- struct node_vtable *c,
- sd_bus_error *error) {
-
- void *u;
- int r;
-
- assert(bus);
- assert(reply);
- assert(path);
- assert(c);
- assert(error);
-
- r = node_vtable_get_userdata(bus, path, c, &u);
- if (r <= 0)
- return r;
-
- r = sd_bus_message_open_container(reply, 'e', "sa{sv}");
- if (r < 0)
- return r;
-
- r = sd_bus_message_append(reply, "s", c->interface);
- if (r < 0)
- return r;
-
- r = sd_bus_message_open_container(reply, 'a', "{sv}");
- if (r < 0)
- return r;
-
- r = vtable_append_all_properties(bus, reply, path, c, u, error);
- if (r < 0)
- return r;
-
- r = sd_bus_message_close_container(reply);
- if (r < 0)
- return r;
-
- r = sd_bus_message_close_container(reply);
- if (r < 0)
- return r;
-
- return 0;
-}
-
-static int object_manager_serialize_path(
- sd_bus *bus,
- sd_bus_message *reply,
- const char *prefix,
- const char *path,
- bool require_fallback,
- sd_bus_error *error) {
-
- struct node_vtable *i;
- struct node *n;
- int r;
-
- assert(bus);
- assert(reply);
- assert(prefix);
- assert(path);
- assert(error);
-
- n = hashmap_get(bus->nodes, prefix);
- if (!n)
- return 0;
-
- r = sd_bus_message_open_container(reply, 'e', "oa{sa{sv}}");
- if (r < 0)
- return r;
-
- r = sd_bus_message_append(reply, "o", path);
- if (r < 0)
- return r;
-
- r = sd_bus_message_open_container(reply, 'a', "{sa{sv}}");
- if (r < 0)
- return r;
-
- LIST_FOREACH(vtables, i, n->vtables) {
-
- if (require_fallback && !i->is_fallback)
- continue;
-
- r = object_manager_serialize_vtable(bus, reply, path, i, error);
- if (r < 0)
- return r;
- if (sd_bus_error_is_set(error))
- return 0;
- }
-
- r = sd_bus_message_close_container(reply);
- if (r < 0)
- return r;
-
- r = sd_bus_message_close_container(reply);
- if (r < 0)
- return r;
-
- return 1;
-}
-
-static int object_manager_serialize_path_and_fallbacks(
- sd_bus *bus,
- sd_bus_message *reply,
- const char *path,
- sd_bus_error *error) {
-
- size_t pl;
- int r;
-
- assert(bus);
- assert(reply);
- assert(path);
- assert(error);
-
- /* First, add all vtables registered for this path */
- r = object_manager_serialize_path(bus, reply, path, path, false, error);
- if (r < 0)
- return r;
- if (sd_bus_error_is_set(error))
- return 0;
-
- /* Second, add fallback vtables registered for any of the prefixes */
- pl = strlen(path);
- if (pl > 1) {
- char p[pl + 1];
- strcpy(p, path);
-
- for (;;) {
- char *e;
-
- e = strrchr(p, '/');
- if (e == p || !e)
- break;
-
- *e = 0;
-
- r = object_manager_serialize_path(bus, reply, p, path, true, error);
- if (r < 0)
- return r;
-
- if (sd_bus_error_is_set(error))
- return 0;
- }
- }
-
- return 0;
-}
-
-static int process_get_managed_objects(
- sd_bus *bus,
- sd_bus_message *m,
- struct node *n,
- bool require_fallback,
- bool *found_object) {
-
- _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
- _cleanup_set_free_free_ Set *s = NULL;
- bool empty;
- int r;
-
- assert(bus);
- assert(m);
- assert(n);
- assert(found_object);
-
- if (!bus_node_with_object_manager(bus, n))
- return 0;
-
- r = get_child_nodes(bus, m->path, n, &s);
- if (r < 0)
- return r;
-
- r = sd_bus_message_new_method_return(bus, m, &reply);
- if (r < 0)
- return r;
-
- r = sd_bus_message_open_container(reply, 'a', "{oa{sa{sv}}}");
- if (r < 0)
- return r;
-
- empty = set_isempty(s);
- if (empty) {
- struct node_vtable *c;
-
- /* Hmm, so we have no children? Then let's check
- * whether we exist at all, i.e. whether at least one
- * vtable exists. */
-
- LIST_FOREACH(vtables, c, n->vtables) {
-
- if (require_fallback && !c->is_fallback)
- continue;
-
- if (r < 0)
- return r;
- if (r == 0)
- continue;
-
- empty = false;
- break;
- }
-
- if (empty)
- return 0;
- } else {
- Iterator i;
- char *path;
-
- SET_FOREACH(path, s, i) {
- _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
-
- r = object_manager_serialize_path_and_fallbacks(bus, reply, path, &error);
- if (r < 0)
- return -ENOMEM;
-
- if (sd_bus_error_is_set(&error)) {
- r = sd_bus_reply_method_error(bus, m, &error);
- if (r < 0)
- return r;
-
- return 1;
- }
- }
- }
-
- r = sd_bus_message_close_container(reply);
- if (r < 0)
- return r;
-
- r = sd_bus_send(bus, reply, NULL);
- if (r < 0)
- return r;
-
- return 1;
-}
-
-static int object_find_and_run(
- sd_bus *bus,
- sd_bus_message *m,
- const char *p,
- bool require_fallback,
- bool *found_object) {
-
- struct node *n;
- struct vtable_member vtable_key, *v;
- int r;
-
- assert(bus);
- assert(m);
- assert(p);
- assert(found_object);
-
- n = hashmap_get(bus->nodes, p);
- if (!n)
- return 0;
-
- /* First, try object callbacks */
- r = node_callbacks_run(bus, m, n->callbacks, require_fallback, found_object);
- if (r != 0)
- return r;
-
- if (!m->interface || !m->member)
- return 0;
-
- /* Then, look for a known method */
- vtable_key.path = (char*) p;
- vtable_key.interface = m->interface;
- vtable_key.member = m->member;
-
- v = hashmap_get(bus->vtable_methods, &vtable_key);
- if (v) {
- r = method_callbacks_run(bus, m, v, require_fallback, found_object);
- if (r != 0)
- return r;
- }
-
- /* Then, look for a known property */
- if (streq(m->interface, "org.freedesktop.DBus.Properties")) {
- bool get = false;
-
- get = streq(m->member, "Get");
-
- if (get || streq(m->member, "Set")) {
-
- r = sd_bus_message_rewind(m, true);
- if (r < 0)
- return r;
-
- vtable_key.path = (char*) p;
-
- r = sd_bus_message_read(m, "ss", &vtable_key.interface, &vtable_key.member);
- if (r < 0)
- return r;
-
- v = hashmap_get(bus->vtable_properties, &vtable_key);
- if (v) {
- r = property_get_set_callbacks_run(bus, m, v, require_fallback, get, found_object);
- if (r != 0)
- return r;
- }
-
- } else if (streq(m->member, "GetAll")) {
- const char *iface;
-
- r = sd_bus_message_rewind(m, true);
- if (r < 0)
- return r;
-
- r = sd_bus_message_read(m, "s", &iface);
- if (r < 0)
- return r;
-
- if (iface[0] == 0)
- iface = NULL;
-
- r = property_get_all_callbacks_run(bus, m, n->vtables, require_fallback, iface, found_object);
- if (r != 0)
- return r;
- }
-
- } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus.Introspectable", "Introspect")) {
-
- r = process_introspect(bus, m, n, require_fallback, found_object);
- if (r != 0)
- return r;
-
- } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus.ObjectManager", "GetManagedObjects")) {
-
- r = process_get_managed_objects(bus, m, n, require_fallback, found_object);
- if (r != 0)
- return r;
- }
-
- if (!*found_object) {
- r = bus_node_exists(bus, n, m->path, require_fallback);
- if (r < 0)
- return r;
-
- if (r > 0)
- *found_object = true;
- }
-
- return 0;
-}
-
-static int process_object(sd_bus *bus, sd_bus_message *m) {
- int r;
- size_t pl;
- bool found_object = false;
-
- assert(bus);
- assert(m);
-
- if (m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_CALL)
- return 0;
-
- if (!m->path)
- return 0;
-
- if (hashmap_isempty(bus->nodes))
- return 0;
-
- pl = strlen(m->path);
- do {
- char p[pl+1];
-
- bus->nodes_modified = false;
-
- r = object_find_and_run(bus, m, m->path, false, &found_object);
- if (r != 0)
- return r;
-
- /* Look for fallback prefixes */
- strcpy(p, m->path);
- for (;;) {
- char *e;
-
- if (streq(p, "/"))
- break;
-
- if (bus->nodes_modified)
- break;
-
- e = strrchr(p, '/');
- assert(e);
- if (e == p)
- *(e+1) = 0;
- else
- *e = 0;
-
- r = object_find_and_run(bus, m, p, true, &found_object);
- if (r != 0)
- return r;
- }
-
- } while (bus->nodes_modified);
-
- if (!found_object)
- return 0;
-
- if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus.Properties", "Get") ||
- sd_bus_message_is_method_call(m, "org.freedesktop.DBus.Properties", "Set"))
- r = sd_bus_reply_method_errorf(
- bus, m,
- "org.freedesktop.DBus.Error.UnknownProperty",
- "Unknown property or interface.");
- else
- r = sd_bus_reply_method_errorf(
- bus, m,
- "org.freedesktop.DBus.Error.UnknownMethod",
- "Unknown method '%s' or interface '%s'.", m->member, m->interface);
-
- if (r < 0)
- return r;
-
- return 1;
-}
-
-static int process_message(sd_bus *bus, sd_bus_message *m) {
- int r;
-
- assert(bus);
- assert(m);
-
- bus->iteration_counter++;
-
- r = process_hello(bus, m);
- if (r != 0)
- return r;
-
- r = process_reply(bus, m);
- if (r != 0)
- return r;
-
- r = process_filter(bus, m);
- if (r != 0)
- return r;
-
- r = process_match(bus, m);
- if (r != 0)
- return r;
-
- r = process_builtin(bus, m);
- if (r != 0)
- return r;
-
- return process_object(bus, m);
-}
-
-static int process_running(sd_bus *bus, sd_bus_message **ret) {
- _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
- int r;
-
- assert(bus);
- assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO);
-
- r = process_timeout(bus);
- if (r != 0)
- goto null_message;
-
- r = dispatch_wqueue(bus);
- if (r != 0)
- goto null_message;
-
- r = dispatch_rqueue(bus, &m);
- if (r < 0)
- return r;
- if (!m)
- goto null_message;
-
- r = process_message(bus, m);
- if (r != 0)
- goto null_message;
-
- if (ret) {
- r = sd_bus_message_rewind(m, true);
- if (r < 0)
- return r;
-
- *ret = m;
- m = NULL;
- return 1;
- }
-
- if (m->header->type == SD_BUS_MESSAGE_TYPE_METHOD_CALL) {
-
- r = sd_bus_reply_method_errorf(
- bus, m,
- "org.freedesktop.DBus.Error.UnknownObject",
- "Unknown object '%s'.", m->path);
- if (r < 0)
- return r;
- }
-
- return 1;
-
-null_message:
- if (r >= 0 && ret)
- *ret = NULL;
-
- return r;
-}
-
-int sd_bus_process(sd_bus *bus, sd_bus_message **ret) {
- int r;
-
- /* Returns 0 when we didn't do anything. This should cause the
- * caller to invoke sd_bus_wait() before returning the next
- * time. Returns > 0 when we did something, which possibly
- * means *ret is filled in with an unprocessed message. */
-
- if (!bus)
- return -EINVAL;
- if (bus_pid_changed(bus))
- return -ECHILD;
-
- /* We don't allow recursively invoking sd_bus_process(). */
- if (bus->processing)
- return -EBUSY;
-
- switch (bus->state) {
-
- case BUS_UNSET:
- case BUS_CLOSED:
- return -ENOTCONN;
-
- case BUS_OPENING:
- r = bus_socket_process_opening(bus);
- if (r < 0)
- return r;
- if (ret)
- *ret = NULL;
- return r;
-
- case BUS_AUTHENTICATING:
-
- r = bus_socket_process_authenticating(bus);
- if (r < 0)
- return r;
- if (ret)
- *ret = NULL;
- return r;
-
- case BUS_RUNNING:
- case BUS_HELLO:
-
- bus->processing = true;
- r = process_running(bus, ret);
- bus->processing = false;
-
- return r;
- }
-
- assert_not_reached("Unknown state");
-}
-
-static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec) {
- struct pollfd p[2] = {};
- int r, e, n;
- struct timespec ts;
- usec_t until, m;
-
- assert(bus);
-
- if (!BUS_IS_OPEN(bus->state))
- return -ENOTCONN;
-
- e = sd_bus_get_events(bus);
- if (e < 0)
- return e;
-
- if (need_more)
- e |= POLLIN;
-
- r = sd_bus_get_timeout(bus, &until);
- if (r < 0)
- return r;
- if (r == 0)
- m = (uint64_t) -1;
- else {
- usec_t nw;
- nw = now(CLOCK_MONOTONIC);
- m = until > nw ? until - nw : 0;
- }
-
- if (timeout_usec != (uint64_t) -1 && (m == (uint64_t) -1 || timeout_usec < m))
- m = timeout_usec;
-
- p[0].fd = bus->input_fd;
- if (bus->output_fd == bus->input_fd) {
- p[0].events = e;
- n = 1;
- } else {
- p[0].events = e & POLLIN;
- p[1].fd = bus->output_fd;
- p[1].events = e & POLLOUT;
- n = 2;
- }
-
- r = ppoll(p, n, m == (uint64_t) -1 ? NULL : timespec_store(&ts, m), NULL);
- if (r < 0)
- return -errno;
-
- return r > 0 ? 1 : 0;
-}
-
-int sd_bus_wait(sd_bus *bus, uint64_t timeout_usec) {
-
- if (!bus)
- return -EINVAL;
- if (!BUS_IS_OPEN(bus->state))
- return -ENOTCONN;
- if (bus_pid_changed(bus))
- return -ECHILD;
-
- if (bus->rqueue_size > 0)
- return 0;
-
- return bus_poll(bus, false, timeout_usec);
-}
-
-int sd_bus_flush(sd_bus *bus) {
- int r;
-
- if (!bus)
- return -EINVAL;
- if (!BUS_IS_OPEN(bus->state))
- return -ENOTCONN;
- if (bus_pid_changed(bus))
- return -ECHILD;
-
- r = bus_ensure_running(bus);
- if (r < 0)
- return r;
-
- if (bus->wqueue_size <= 0)
- return 0;
-
- for (;;) {
- r = dispatch_wqueue(bus);
- if (r < 0)
- return r;
-
- if (bus->wqueue_size <= 0)
- return 0;
-
- r = bus_poll(bus, false, (uint64_t) -1);
- if (r < 0)
- return r;
- }
-}
-
-int sd_bus_add_filter(sd_bus *bus, sd_bus_message_handler_t callback, void *userdata) {
- struct filter_callback *f;
-
- if (!bus)
- return -EINVAL;
- if (!callback)
- return -EINVAL;
- if (bus_pid_changed(bus))
- return -ECHILD;
-
- f = new0(struct filter_callback, 1);
- if (!f)
- return -ENOMEM;
- f->callback = callback;
- f->userdata = userdata;
-
- bus->filter_callbacks_modified = true;
- LIST_PREPEND(struct filter_callback, callbacks, bus->filter_callbacks, f);
- return 0;
-}
-
-int sd_bus_remove_filter(sd_bus *bus, sd_bus_message_handler_t callback, void *userdata) {
- struct filter_callback *f;
-
- if (!bus)
- return -EINVAL;
- if (!callback)
- return -EINVAL;
- if (bus_pid_changed(bus))
- return -ECHILD;
-
- LIST_FOREACH(callbacks, f, bus->filter_callbacks) {
- if (f->callback == callback && f->userdata == userdata) {
- bus->filter_callbacks_modified = true;
- LIST_REMOVE(struct filter_callback, callbacks, bus->filter_callbacks, f);
- free(f);
- return 1;
- }
- }
-
- return 0;
-}
-
-static struct node *bus_node_allocate(sd_bus *bus, const char *path) {
- struct node *n, *parent;
- const char *e;
- char *s, *p;
- int r;
-
- assert(bus);
- assert(path);
- assert(path[0] == '/');
-
- n = hashmap_get(bus->nodes, path);
- if (n)
- return n;
-
- r = hashmap_ensure_allocated(&bus->nodes, string_hash_func, string_compare_func);
- if (r < 0)
- return NULL;
-
- s = strdup(path);
- if (!s)
- return NULL;
-
- if (streq(path, "/"))
- parent = NULL;
- else {
- e = strrchr(path, '/');
- assert(e);
-
- p = strndupa(path, MAX(1, path - e));
-
- parent = bus_node_allocate(bus, p);
- if (!parent) {
- free(s);
- return NULL;
- }
- }
-
- n = new0(struct node, 1);
- if (!n)
- return NULL;
-
- n->parent = parent;
- n->path = s;
-
- r = hashmap_put(bus->nodes, s, n);
- if (r < 0) {
- free(s);
- free(n);
- return NULL;
- }
-
- if (parent)
- LIST_PREPEND(struct node, siblings, parent->child, n);
-
- return n;
-}
-
-static void bus_node_gc(sd_bus *b, struct node *n) {
- assert(b);
-
- if (!n)
- return;
-
- if (n->child ||
- n->callbacks ||
- n->vtables ||
- n->enumerators ||
- n->object_manager)
- return;
-
- assert(hashmap_remove(b->nodes, n->path) == n);
-
- if (n->parent)
- LIST_REMOVE(struct node, siblings, n->parent->child, n);
-
- free(n->path);
- bus_node_gc(b, n->parent);
- free(n);
-}
-
-static int bus_add_object(
- sd_bus *b,
- bool fallback,
- const char *path,
- sd_bus_message_handler_t callback,
- void *userdata) {
-
- struct node_callback *c;
- struct node *n;
- int r;
-
- if (!b)
- return -EINVAL;
- if (!object_path_is_valid(path))
- return -EINVAL;
- if (!callback)
- return -EINVAL;
- if (bus_pid_changed(b))
- return -ECHILD;
-
- n = bus_node_allocate(b, path);
- if (!n)
- return -ENOMEM;
-
- c = new0(struct node_callback, 1);
- if (!c) {
- r = -ENOMEM;
- goto fail;
- }
-
- c->node = n;
- c->callback = callback;
- c->userdata = userdata;
- c->is_fallback = fallback;
-
- LIST_PREPEND(struct node_callback, callbacks, n->callbacks, c);
- return 0;
-
-fail:
- free(c);
- bus_node_gc(b, n);
- return r;
-}
-
-static int bus_remove_object(
- sd_bus *bus,
- bool fallback,
- const char *path,
- sd_bus_message_handler_t callback,
- void *userdata) {
-
- struct node_callback *c;
- struct node *n;
-
- if (!bus)
- return -EINVAL;
- if (!object_path_is_valid(path))
- return -EINVAL;
- if (!callback)
- return -EINVAL;
- if (bus_pid_changed(bus))
- return -ECHILD;
-
- n = hashmap_get(bus->nodes, path);
- if (!n)
- return 0;
-
- LIST_FOREACH(callbacks, c, n->callbacks)
- if (c->callback == callback && c->userdata == userdata && c->is_fallback == fallback)
- break;
- if (!c)
- return 0;
-
- LIST_REMOVE(struct node_callback, callbacks, n->callbacks, c);
- free(c);
-
- bus_node_gc(bus, n);
-
- return 1;
-}
-
-int sd_bus_add_object(sd_bus *bus, const char *path, sd_bus_message_handler_t callback, void *userdata) {
- return bus_add_object(bus, false, path, callback, userdata);
-}
-
-int sd_bus_remove_object(sd_bus *bus, const char *path, sd_bus_message_handler_t callback, void *userdata) {
- return bus_remove_object(bus, false, path, callback, userdata);
-}
-
-int sd_bus_add_fallback(sd_bus *bus, const char *prefix, sd_bus_message_handler_t callback, void *userdata) {
- return bus_add_object(bus, true, prefix, callback, userdata);
-}
-
-int sd_bus_remove_fallback(sd_bus *bus, const char *prefix, sd_bus_message_handler_t callback, void *userdata) {
- return bus_remove_object(bus, true, prefix, callback, userdata);
-}
-
-int sd_bus_add_match(sd_bus *bus, const char *match, sd_bus_message_handler_t callback, void *userdata) {
- struct bus_match_component *components = NULL;
- unsigned n_components = 0;
- uint64_t cookie = 0;
- int r = 0;
-
- if (!bus)
- return -EINVAL;
- if (!match)
- return -EINVAL;
- if (bus_pid_changed(bus))
- return -ECHILD;
-
- r = bus_match_parse(match, &components, &n_components);
- if (r < 0)
- goto finish;
-
- if (bus->bus_client) {
- cookie = ++bus->match_cookie;
-
- r = bus_add_match_internal(bus, match, components, n_components, cookie);
- if (r < 0)
- goto finish;
- }
-
- bus->match_callbacks_modified = true;
- r = bus_match_add(&bus->match_callbacks, components, n_components, callback, userdata, cookie, NULL);
- if (r < 0) {
- if (bus->bus_client)
- bus_remove_match_internal(bus, match, cookie);
- }
-
-finish:
- bus_match_parse_free(components, n_components);
- return r;
-}
-
-int sd_bus_remove_match(sd_bus *bus, const char *match, sd_bus_message_handler_t callback, void *userdata) {
- struct bus_match_component *components = NULL;
- unsigned n_components = 0;
- int r = 0, q = 0;
- uint64_t cookie = 0;
-
- if (!bus)
- return -EINVAL;
- if (!match)
- return -EINVAL;
- if (bus_pid_changed(bus))
- return -ECHILD;
-
- r = bus_match_parse(match, &components, &n_components);
- if (r < 0)
- return r;
-
- bus->match_callbacks_modified = true;
- r = bus_match_remove(&bus->match_callbacks, components, n_components, callback, userdata, &cookie);
-
- if (bus->bus_client)
- q = bus_remove_match_internal(bus, match, cookie);
-
- bus_match_parse_free(components, n_components);
-
- return r < 0 ? r : q;
-}
-
-int sd_bus_emit_signal(
- sd_bus *bus,
- const char *path,
- const char *interface,
- const char *member,
- const char *types, ...) {
-
- _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
- int r;
-
- if (!bus)
- return -EINVAL;
- if (!BUS_IS_OPEN(bus->state))
- return -ENOTCONN;
- if (bus_pid_changed(bus))
- return -ECHILD;
-
- r = sd_bus_message_new_signal(bus, path, interface, member, &m);
- if (r < 0)
- return r;
-
- if (!isempty(types)) {
- va_list ap;
-
- va_start(ap, types);
- r = bus_message_append_ap(m, types, ap);
- va_end(ap);
- if (r < 0)
- return r;
- }
-
- return sd_bus_send(bus, m, NULL);
-}
-
-int sd_bus_call_method(
- sd_bus *bus,
- const char *destination,
- const char *path,
- const char *interface,
- const char *member,
- sd_bus_error *error,
- sd_bus_message **reply,
- const char *types, ...) {
-
- _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
- int r;
-
- if (!bus)
-
- return -EINVAL;
- if (!BUS_IS_OPEN(bus->state))
- return -ENOTCONN;
- if (bus_pid_changed(bus))
- return -ECHILD;
-
- r = sd_bus_message_new_method_call(bus, destination, path, interface, member, &m);
- if (r < 0)
- return r;
-
- if (!isempty(types)) {
- va_list ap;
-
- va_start(ap, types);
- r = bus_message_append_ap(m, types, ap);
- va_end(ap);
- if (r < 0)
- return r;
- }
-
- return sd_bus_send_with_reply_and_block(bus, m, 0, error, reply);
-}
-
-int sd_bus_reply_method_return(
- sd_bus *bus,
- sd_bus_message *call,
- const char *types, ...) {
-
- _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
- int r;
-
- if (!bus)
- return -EINVAL;
- if (!call)
- return -EINVAL;
- if (!call->sealed)
- return -EPERM;
- if (call->header->type != SD_BUS_MESSAGE_TYPE_METHOD_CALL)
- return -EINVAL;
- if (!BUS_IS_OPEN(bus->state))
- return -ENOTCONN;
- if (bus_pid_changed(bus))
- return -ECHILD;
-
- if (call->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED)
- return 0;
-
- r = sd_bus_message_new_method_return(bus, call, &m);
- if (r < 0)
- return r;
-
- if (!isempty(types)) {
- va_list ap;
-
- va_start(ap, types);
- r = bus_message_append_ap(m, types, ap);
- va_end(ap);
- if (r < 0)
- return r;
- }
-
- return sd_bus_send(bus, m, NULL);
-}
-
-int sd_bus_reply_method_error(
- sd_bus *bus,
- sd_bus_message *call,
- const sd_bus_error *e) {
-
- _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
- int r;
-
- if (!bus)
- return -EINVAL;
- if (!call)
- return -EINVAL;
- if (!call->sealed)
- return -EPERM;
- if (call->header->type != SD_BUS_MESSAGE_TYPE_METHOD_CALL)
- return -EINVAL;
- if (!sd_bus_error_is_set(e))
- return -EINVAL;
- if (!BUS_IS_OPEN(bus->state))
- return -ENOTCONN;
- if (bus_pid_changed(bus))
- return -ECHILD;
-
- if (call->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED)
- return 0;
-
- r = sd_bus_message_new_method_error(bus, call, e, &m);
- if (r < 0)
- return r;
-
- return sd_bus_send(bus, m, NULL);
-}
-
-int sd_bus_reply_method_errorf(
- sd_bus *bus,
- sd_bus_message *call,
- const char *name,
- const char *format,
- ...) {
-
- _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
- char *n, *m;
- va_list ap;
- int r;
-
- n = strdup(name);
- if (!n)
- return -ENOMEM;
-
- if (format) {
- va_start(ap, format);
- r = vasprintf(&m, format, ap);
- va_end(ap);
-
- if (r < 0) {
- free(n);
- return -ENOMEM;
- }
- }
-
- error.name = n;
- error.message = m;
- error.need_free = true;
-
- return sd_bus_reply_method_error(bus, call, &error);
-}
-
-bool bus_pid_changed(sd_bus *bus) {
- assert(bus);
-
- /* We don't support people creating a bus connection and
- * keeping it around over a fork(). Let's complain. */
-
- return bus->original_pid != getpid();
-}
-
-static void free_node_vtable(sd_bus *bus, struct node_vtable *w) {
- assert(bus);
-
- if (!w)
- return;
-
- if (w->interface && w->node && w->vtable) {
- const sd_bus_vtable *v;
-
- for (v = w->vtable; v->type != _SD_BUS_VTABLE_END; v++) {
- struct vtable_member *x = NULL;
-
- switch (v->type) {
-
- case _SD_BUS_VTABLE_METHOD: {
- struct vtable_member key;
-
- key.path = w->node->path;
- key.interface = w->interface;
- key.member = v->method.member;
-
- x = hashmap_remove(bus->vtable_methods, &key);
- break;
- }
-
- case _SD_BUS_VTABLE_PROPERTY:
- case _SD_BUS_VTABLE_WRITABLE_PROPERTY: {
- struct vtable_member key;
-
- key.path = w->node->path;
- key.interface = w->interface;
- key.member = v->property.member;
- x = hashmap_remove(bus->vtable_properties, &key);
- break;
- }}
-
- free(x);
- }
- }
-
- free(w->interface);
- free(w);
-}
-
-static unsigned vtable_member_hash_func(const void *a) {
- const struct vtable_member *m = a;
-
- return
- string_hash_func(m->path) ^
- string_hash_func(m->interface) ^
- string_hash_func(m->member);
-}
-
-static int vtable_member_compare_func(const void *a, const void *b) {
- const struct vtable_member *x = a, *y = b;
- int r;
-
- r = strcmp(x->path, y->path);
- if (r != 0)
- return r;
-
- r = strcmp(x->interface, y->interface);
- if (r != 0)
- return r;
-
- return strcmp(x->member, y->member);
-}
-
-static int add_object_vtable_internal(
- sd_bus *bus,
- const char *path,
- const char *interface,
- const sd_bus_vtable *vtable,
- bool fallback,
- sd_bus_object_find_t find,
- void *userdata) {
-
- struct node_vtable *c = NULL, *i;
- const sd_bus_vtable *v;
- struct node *n;
- int r;
-
- if (!bus)
- return -EINVAL;
- if (!object_path_is_valid(path))
- return -EINVAL;
- if (!interface_name_is_valid(interface))
- return -EINVAL;
- if (!vtable || vtable[0].type != _SD_BUS_VTABLE_START || vtable[0].start.element_size != sizeof(struct sd_bus_vtable))
- return -EINVAL;
- if (bus_pid_changed(bus))
- return -ECHILD;
-
- r = hashmap_ensure_allocated(&bus->vtable_methods, vtable_member_hash_func, vtable_member_compare_func);
- if (r < 0)
- return r;
-
- r = hashmap_ensure_allocated(&bus->vtable_properties, vtable_member_hash_func, vtable_member_compare_func);
- if (r < 0)
- return r;
-
- n = bus_node_allocate(bus, path);
- if (!n)
- return -ENOMEM;
-
- LIST_FOREACH(vtables, i, n->vtables) {
- if (streq(i->interface, interface)) {
- r = -EEXIST;
- goto fail;
- }
-
- if (i->is_fallback != fallback) {
- r = -EPROTOTYPE;
- goto fail;
- }
- }
-
- c = new0(struct node_vtable, 1);
- if (!c) {
- r = -ENOMEM;
- goto fail;
- }
-
- c->node = n;
- c->is_fallback = fallback;
- c->vtable = vtable;
- c->userdata = userdata;
- c->find = find;
-
- c->interface = strdup(interface);
- if (!c->interface) {
- r = -ENOMEM;
- goto fail;
- }
-
- for (v = c->vtable+1; v->type != _SD_BUS_VTABLE_END; v++) {
-
- switch (v->type) {
-
- case _SD_BUS_VTABLE_METHOD: {
- struct vtable_member *m;
-
- if (!member_name_is_valid(v->method.member) ||
- !signature_is_valid(strempty(v->method.signature), false) ||
- !signature_is_valid(strempty(v->method.result), false) ||
- !(v->method.handler || (isempty(v->method.signature) && isempty(v->method.result))) ||
- v->flags & (SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE|SD_BUS_VTABLE_PROPERTY_INVALIDATE_ONLY)) {
- r = -EINVAL;
- goto fail;
- }
-
- m = new0(struct vtable_member, 1);
- if (!m) {
- r = -ENOMEM;
- goto fail;
- }
-
- m->parent = c;
- m->path = n->path;
- m->interface = c->interface;
- m->member = v->method.member;
- m->vtable = v;
-
- r = hashmap_put(bus->vtable_methods, m, m);
- if (r < 0) {
- free(m);
- goto fail;
- }
-
- break;
- }
-
- case _SD_BUS_VTABLE_WRITABLE_PROPERTY:
-
- if (!(v->property.set || bus_type_is_basic(v->property.signature[0]))) {
- r = -EINVAL;
- goto fail;
- }
-
- /* Fall through */
-
- case _SD_BUS_VTABLE_PROPERTY: {
- struct vtable_member *m;
-
- if (!member_name_is_valid(v->property.member) ||
- !signature_is_single(v->property.signature, false) ||
- !(v->property.get || bus_type_is_basic(v->property.signature[0])) ||
- v->flags & SD_BUS_VTABLE_METHOD_NO_REPLY ||
- (v->flags & SD_BUS_VTABLE_PROPERTY_INVALIDATE_ONLY && !(v->flags & SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE))) {
- r = -EINVAL;
- goto fail;
- }
-
-
- m = new0(struct vtable_member, 1);
- if (!m) {
- r = -ENOMEM;
- goto fail;
- }
-
- m->parent = c;
- m->path = n->path;
- m->interface = c->interface;
- m->member = v->property.member;
- m->vtable = v;
-
- r = hashmap_put(bus->vtable_properties, m, m);
- if (r < 0) {
- free(m);
- goto fail;
- }
-
- break;
- }
-
- case _SD_BUS_VTABLE_SIGNAL:
-
- if (!member_name_is_valid(v->signal.member) ||
- !signature_is_single(strempty(v->signal.signature), false)) {
- r = -EINVAL;
- goto fail;
- }
-
- break;
-
- default:
- r = -EINVAL;
- goto fail;
- }
- }
-
- LIST_PREPEND(struct node_vtable, vtables, n->vtables, c);
- return 0;
-
-fail:
- if (c)
- free_node_vtable(bus, c);
-
- bus_node_gc(bus, n);
- return r;
-}
-
-static int remove_object_vtable_internal(
- sd_bus *bus,
- const char *path,
- const char *interface,
- bool fallback) {
-
- struct node_vtable *c;
- struct node *n;
-
- if (!bus)
- return -EINVAL;
- if (!object_path_is_valid(path))
- return -EINVAL;
- if (!interface_name_is_valid(interface))
- return -EINVAL;
- if (bus_pid_changed(bus))
- return -ECHILD;
-
- n = hashmap_get(bus->nodes, path);
- if (!n)
- return 0;
-
- LIST_FOREACH(vtables, c, n->vtables)
- if (streq(c->interface, interface) && c->is_fallback == fallback)
- break;
-
- if (!c)
- return 0;
-
- LIST_REMOVE(struct node_vtable, vtables, n->vtables, c);
-
- free_node_vtable(bus, c);
- return 1;
-}
-
-int sd_bus_add_object_vtable(
- sd_bus *bus,
- const char *path,
- const char *interface,
- const sd_bus_vtable *vtable,
- void *userdata) {
-
- return add_object_vtable_internal(bus, path, interface, vtable, false, NULL, userdata);
-}
-
-int sd_bus_remove_object_vtable(
- sd_bus *bus,
- const char *path,
- const char *interface) {
-
- return remove_object_vtable_internal(bus, path, interface, false);
-}
-
-int sd_bus_add_fallback_vtable(
- sd_bus *bus,
- const char *path,
- const char *interface,
- const sd_bus_vtable *vtable,
- sd_bus_object_find_t find,
- void *userdata) {
-
- return add_object_vtable_internal(bus, path, interface, vtable, true, find, userdata);
-}
-
-int sd_bus_remove_fallback_vtable(
- sd_bus *bus,
- const char *path,
- const char *interface) {
-
- return remove_object_vtable_internal(bus, path, interface, true);
-}
-
-int sd_bus_add_node_enumerator(
- sd_bus *bus,
- const char *path,
- sd_bus_node_enumerator_t callback,
- void *userdata) {
-
- struct node_enumerator *c;
- struct node *n;
- int r;
+int sd_bus_add_filter(sd_bus *bus, sd_bus_message_handler_t callback, void *userdata) {
+ struct filter_callback *f;
if (!bus)
return -EINVAL;
- if (!object_path_is_valid(path))
- return -EINVAL;
if (!callback)
return -EINVAL;
if (bus_pid_changed(bus))
return -ECHILD;
- n = bus_node_allocate(bus, path);
- if (!n)
+ f = new0(struct filter_callback, 1);
+ if (!f)
return -ENOMEM;
+ f->callback = callback;
+ f->userdata = userdata;
- c = new0(struct node_enumerator, 1);
- if (!c) {
- r = -ENOMEM;
- goto fail;
- }
-
- c->node = n;
- c->callback = callback;
- c->userdata = userdata;
-
- LIST_PREPEND(struct node_enumerator, enumerators, n->enumerators, c);
+ bus->filter_callbacks_modified = true;
+ LIST_PREPEND(struct filter_callback, callbacks, bus->filter_callbacks, f);
return 0;
-
-fail:
- free(c);
- bus_node_gc(bus, n);
- return r;
}
-int sd_bus_remove_node_enumerator(
- sd_bus *bus,
- const char *path,
- sd_bus_node_enumerator_t callback,
- void *userdata) {
-
- struct node_enumerator *c;
- struct node *n;
+int sd_bus_remove_filter(sd_bus *bus, sd_bus_message_handler_t callback, void *userdata) {
+ struct filter_callback *f;
if (!bus)
return -EINVAL;
- if (!object_path_is_valid(path))
- return -EINVAL;
if (!callback)
return -EINVAL;
if (bus_pid_changed(bus))
return -ECHILD;
- n = hashmap_get(bus->nodes, path);
- if (!n)
- return 0;
-
- LIST_FOREACH(enumerators, c, n->enumerators)
- if (c->callback == callback && c->userdata == userdata)
- break;
-
- if (!c)
- return 0;
-
- LIST_REMOVE(struct node_enumerator, enumerators, n->enumerators, c);
- free(c);
-
- bus_node_gc(bus, n);
-
- return 1;
-}
-
-static int emit_properties_changed_on_interface(
- sd_bus *bus,
- const char *prefix,
- const char *path,
- const char *interface,
- bool require_fallback,
- char **names) {
-
- _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
- bool has_invalidating = false;
- struct vtable_member key;
- struct node_vtable *c;
- struct node *n;
- char **property;
- void *u = NULL;
- int r;
-
- assert(bus);
- assert(path);
- assert(interface);
-
- n = hashmap_get(bus->nodes, prefix);
- if (!n)
- return 0;
-
- LIST_FOREACH(vtables, c, n->vtables) {
- if (require_fallback && !c->is_fallback)
- continue;
-
- if (streq(c->interface, interface))
- break;
- }
-
- if (!c)
- return 0;
-
- r = node_vtable_get_userdata(bus, path, c, &u);
- if (r <= 0)
- return r;
-
- r = sd_bus_message_new_signal(bus, path, "org.freedesktop.DBus.Properties", "PropertiesChanged", &m);
- if (r < 0)
- return r;
-
- r = sd_bus_message_append(m, "s", interface);
- if (r < 0)
- return r;
-
- r = sd_bus_message_open_container(m, 'a', "{sv}");
- if (r < 0)
- return r;
-
- key.path = prefix;
- key.interface = interface;
-
- STRV_FOREACH(property, names) {
- _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
- struct vtable_member *v;
-
- key.member = *property;
- v = hashmap_get(bus->vtable_properties, &key);
- if (!v)
- return -ENOENT;
-
- assert(c == v->parent);
-
- if (!(v->vtable->flags & SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE))
- return -EDOM;
- if (v->vtable->flags & SD_BUS_VTABLE_PROPERTY_INVALIDATE_ONLY) {
- has_invalidating = true;
- continue;
- }
-
- r = sd_bus_message_open_container(m, 'e', "sv");
- if (r < 0)
- return r;
-
- r = sd_bus_message_append(m, "s", *property);
- if (r < 0)
- return r;
-
- r = sd_bus_message_open_container(m, 'v', v->vtable->property.signature);
- if (r < 0)
- return r;
-
- r = invoke_property_get(bus, v->vtable, m->path, interface, *property, m, &error, vtable_property_convert_userdata(v->vtable, u));
- if (r < 0)
- return r;
-
- if (sd_bus_error_is_set(&error))
- return bus_error_to_errno(&error);
-
- r = sd_bus_message_close_container(m);
- if (r < 0)
- return r;
-
- r = sd_bus_message_close_container(m);
- if (r < 0)
- return r;
- }
-
- r = sd_bus_message_close_container(m);
- if (r < 0)
- return r;
-
- r = sd_bus_message_open_container(m, 'a', "s");
- if (r < 0)
- return r;
-
- if (has_invalidating) {
- STRV_FOREACH(property, names) {
- struct vtable_member *v;
-
- key.member = *property;
- assert_se(v = hashmap_get(bus->vtable_properties, &key));
- assert(c == v->parent);
-
- if (!(v->vtable->flags & SD_BUS_VTABLE_PROPERTY_INVALIDATE_ONLY))
- continue;
-
- r = sd_bus_message_append(m, "s", *property);
- if (r < 0)
- return r;
+ LIST_FOREACH(callbacks, f, bus->filter_callbacks) {
+ if (f->callback == callback && f->userdata == userdata) {
+ bus->filter_callbacks_modified = true;
+ LIST_REMOVE(struct filter_callback, callbacks, bus->filter_callbacks, f);
+ free(f);
+ return 1;
}
}
- r = sd_bus_message_close_container(m);
- if (r < 0)
- return r;
-
- r = sd_bus_send(bus, m, NULL);
- if (r < 0)
- return r;
-
- return 1;
+ return 0;
}
-int sd_bus_emit_properties_changed_strv(sd_bus *bus, const char *path, const char *interface, char **names) {
- size_t pl;
- int r;
+int sd_bus_add_match(sd_bus *bus, const char *match, sd_bus_message_handler_t callback, void *userdata) {
+ struct bus_match_component *components = NULL;
+ unsigned n_components = 0;
+ uint64_t cookie = 0;
+ int r = 0;
if (!bus)
return -EINVAL;
- if (!object_path_is_valid(path))
- return -EINVAL;
- if (!interface_name_is_valid(interface))
+ if (!match)
return -EINVAL;
+ if (bus_pid_changed(bus))
+ return -ECHILD;
- r = emit_properties_changed_on_interface(bus, path, path, interface, false, names);
- if (r != 0)
- return r;
-
- pl = strlen(path);
- if (pl > 1 ) {
- char p[pl+1];
-
- strcpy(p, path);
- for (;;) {
- char *e;
-
- if (streq(p, "/"))
- break;
+ r = bus_match_parse(match, &components, &n_components);
+ if (r < 0)
+ goto finish;
- e = strrchr(p, '/');
- assert(e);
- if (e == p)
- *(e+1) = 0;
- else
- *e = 0;
+ if (bus->bus_client) {
+ cookie = ++bus->match_cookie;
- r = emit_properties_changed_on_interface(bus, p, path, interface, true, names);
- if (r != 0)
- return r;
- }
+ r = bus_add_match_internal(bus, match, components, n_components, cookie);
+ if (r < 0)
+ goto finish;
}
- return -ENOENT;
-}
-
-int sd_bus_emit_properties_changed(sd_bus *bus, const char *path, const char *interface, const char *name, ...) {
- _cleanup_strv_free_ char **names = NULL;
- va_list ap;
-
- va_start(ap, name);
- names = strv_new_ap(name, ap);
- va_end(ap);
-
- if (!names)
- return -ENOMEM;
-
- return sd_bus_emit_properties_changed_strv(bus, path, interface, names);
-}
-
-int sd_bus_emit_interfaces_added(sd_bus *bus, const char *path, const char *interfaces, ...) {
- return -ENOSYS;
-}
-
-int sd_bus_emit_interfaces_removed(sd_bus *bus, const char *path, const char *interfaces, ...) {
- return -ENOSYS;
-}
-
-int sd_bus_get_property(
- sd_bus *bus,
- const char *destination,
- const char *path,
- const char *interface,
- const char *member,
- sd_bus_error *error,
- sd_bus_message **reply,
- const char *type) {
-
- sd_bus_message *rep = NULL;
- int r;
-
- if (interface && !interface_name_is_valid(interface))
- return -EINVAL;
- if (!member_name_is_valid(member))
- return -EINVAL;
- if (!signature_is_single(type, false))
- return -EINVAL;
- if (!reply)
- return -EINVAL;
-
- r = sd_bus_call_method(bus, destination, path, "org.freedesktop.DBus.Properties", "Get", error, &rep, "ss", strempty(interface), member);
- if (r < 0)
- return r;
-
- r = sd_bus_message_enter_container(rep, 'v', type);
+ bus->match_callbacks_modified = true;
+ r = bus_match_add(&bus->match_callbacks, components, n_components, callback, userdata, cookie, NULL);
if (r < 0) {
- sd_bus_message_unref(rep);
- return r;
+ if (bus->bus_client)
+ bus_remove_match_internal(bus, match, cookie);
}
- *reply = rep;
- return 0;
+finish:
+ bus_match_parse_free(components, n_components);
+ return r;
}
-int sd_bus_set_property(
- sd_bus *bus,
- const char *destination,
- const char *path,
- const char *interface,
- const char *member,
- sd_bus_error *error,
- const char *type, ...) {
-
- _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
- va_list ap;
- int r;
+int sd_bus_remove_match(sd_bus *bus, const char *match, sd_bus_message_handler_t callback, void *userdata) {
+ struct bus_match_component *components = NULL;
+ unsigned n_components = 0;
+ int r = 0, q = 0;
+ uint64_t cookie = 0;
- if (interface && !interface_name_is_valid(interface))
- return -EINVAL;
- if (!member_name_is_valid(member))
+ if (!bus)
return -EINVAL;
- if (!signature_is_single(type, false))
+ if (!match)
return -EINVAL;
+ if (bus_pid_changed(bus))
+ return -ECHILD;
- r = sd_bus_message_new_method_call(bus, destination, path, "org.freedesktop.DBus.Properties", "Set", &m);
- if (r < 0)
- return r;
-
- r = sd_bus_message_append(m, "ss", strempty(interface), member);
- if (r < 0)
- return r;
-
- r = sd_bus_message_open_container(m, 'v', type);
- if (r < 0)
- return r;
-
- va_start(ap, type);
- r = bus_message_append_ap(m, type, ap);
- va_end(ap);
- if (r < 0)
- return r;
-
- r = sd_bus_message_close_container(m);
+ r = bus_match_parse(match, &components, &n_components);
if (r < 0)
return r;
- return sd_bus_send_with_reply_and_block(bus, m, 0, error, NULL);
-}
-
-int sd_bus_add_object_manager(sd_bus *bus, const char *path) {
- struct node *n;
+ bus->match_callbacks_modified = true;
+ r = bus_match_remove(&bus->match_callbacks, components, n_components, callback, userdata, &cookie);
- if (!bus)
- return -EINVAL;
- if (!object_path_is_valid(path))
- return -EINVAL;
- if (bus_pid_changed(bus))
- return -ECHILD;
+ if (bus->bus_client)
+ q = bus_remove_match_internal(bus, match, cookie);
- n = bus_node_allocate(bus, path);
- if (!n)
- return -ENOMEM;
+ bus_match_parse_free(components, n_components);
- n->object_manager = true;
- return 0;
+ return r < 0 ? r : q;
}
-int sd_bus_remove_object_manager(sd_bus *bus, const char *path) {
- struct node *n;
-
- if (!bus)
- return -EINVAL;
- if (!object_path_is_valid(path))
- return -EINVAL;
- if (bus_pid_changed(bus))
- return -ECHILD;
-
- n = hashmap_get(bus->nodes, path);
- if (!n)
- return 0;
+bool bus_pid_changed(sd_bus *bus) {
+ assert(bus);
- if (!n->object_manager)
- return 0;
+ /* We don't support people creating a bus connection and
+ * keeping it around over a fork(). Let's complain. */
- n->object_manager = false;
- bus_node_gc(bus, n);
- return 1;
+ return bus->original_pid != getpid();
}
projects / platform / upstream / systemd.git / commitdiff