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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include "sd-bus.h"
#include "alloc-util.h"
#include "bus-control.h"
#include "bus-objects.h"
#include "bus-slot.h"
#include "string-util.h"
sd_bus_slot *bus_slot_allocate(
sd_bus *bus,
bool floating,
BusSlotType type,
size_t extra,
void *userdata) {
sd_bus_slot *slot;
assert(bus);
slot = malloc0(offsetof(sd_bus_slot, reply_callback) + extra);
if (!slot)
return NULL;
slot->n_ref = 1;
slot->type = type;
slot->bus = bus;
slot->floating = floating;
slot->userdata = userdata;
if (!floating)
sd_bus_ref(bus);
LIST_PREPEND(slots, bus->slots, slot);
return slot;
}
void bus_slot_disconnect(sd_bus_slot *slot, bool unref) {
sd_bus *bus;
assert(slot);
if (!slot->bus)
return;
switch (slot->type) {
case BUS_REPLY_CALLBACK:
if (slot->reply_callback.cookie != 0)
ordered_hashmap_remove(slot->bus->reply_callbacks, &slot->reply_callback.cookie);
if (slot->reply_callback.timeout_usec != 0)
prioq_remove(slot->bus->reply_callbacks_prioq, &slot->reply_callback, &slot->reply_callback.prioq_idx);
break;
case BUS_FILTER_CALLBACK:
slot->bus->filter_callbacks_modified = true;
LIST_REMOVE(callbacks, slot->bus->filter_callbacks, &slot->filter_callback);
break;
case BUS_MATCH_CALLBACK:
if (slot->match_added)
(void) bus_remove_match_internal(slot->bus, slot->match_callback.match_string);
if (slot->match_callback.install_slot) {
bus_slot_disconnect(slot->match_callback.install_slot, true);
slot->match_callback.install_slot = sd_bus_slot_unref(slot->match_callback.install_slot);
}
slot->bus->match_callbacks_modified = true;
bus_match_remove(&slot->bus->match_callbacks, &slot->match_callback);
slot->match_callback.match_string = mfree(slot->match_callback.match_string);
break;
case BUS_NODE_CALLBACK:
if (slot->node_callback.node) {
LIST_REMOVE(callbacks, slot->node_callback.node->callbacks, &slot->node_callback);
slot->bus->nodes_modified = true;
bus_node_gc(slot->bus, slot->node_callback.node);
}
break;
case BUS_NODE_ENUMERATOR:
if (slot->node_enumerator.node) {
LIST_REMOVE(enumerators, slot->node_enumerator.node->enumerators, &slot->node_enumerator);
slot->bus->nodes_modified = true;
bus_node_gc(slot->bus, slot->node_enumerator.node);
}
break;
case BUS_NODE_OBJECT_MANAGER:
if (slot->node_object_manager.node) {
LIST_REMOVE(object_managers, slot->node_object_manager.node->object_managers, &slot->node_object_manager);
slot->bus->nodes_modified = true;
bus_node_gc(slot->bus, slot->node_object_manager.node);
}
break;
case BUS_NODE_VTABLE:
if (slot->node_vtable.node && slot->node_vtable.interface && slot->node_vtable.vtable) {
const sd_bus_vtable *v;
for (v = slot->node_vtable.vtable; v->type != _SD_BUS_VTABLE_END; v = bus_vtable_next(slot->node_vtable.vtable, v)) {
struct vtable_member *x = NULL;
switch (v->type) {
case _SD_BUS_VTABLE_METHOD: {
struct vtable_member key;
key.path = slot->node_vtable.node->path;
key.interface = slot->node_vtable.interface;
key.member = v->x.method.member;
x = hashmap_remove(slot->bus->vtable_methods, &key);
break;
}
case _SD_BUS_VTABLE_PROPERTY:
case _SD_BUS_VTABLE_WRITABLE_PROPERTY: {
struct vtable_member key;
key.path = slot->node_vtable.node->path;
key.interface = slot->node_vtable.interface;
key.member = v->x.method.member;
x = hashmap_remove(slot->bus->vtable_properties, &key);
break;
}}
free(x);
}
}
slot->node_vtable.interface = mfree(slot->node_vtable.interface);
if (slot->node_vtable.node) {
LIST_REMOVE(vtables, slot->node_vtable.node->vtables, &slot->node_vtable);
slot->bus->nodes_modified = true;
bus_node_gc(slot->bus, slot->node_vtable.node);
}
break;
default:
assert_not_reached("Wut? Unknown slot type?");
}
bus = slot->bus;
slot->type = _BUS_SLOT_INVALID;
slot->bus = NULL;
LIST_REMOVE(slots, bus->slots, slot);
if (!slot->floating)
sd_bus_unref(bus);
else if (unref)
sd_bus_slot_unref(slot);
}
static sd_bus_slot* bus_slot_free(sd_bus_slot *slot) {
assert(slot);
bus_slot_disconnect(slot, false);
if (slot->destroy_callback)
slot->destroy_callback(slot->userdata);
free(slot->description);
return mfree(slot);
}
DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(sd_bus_slot, sd_bus_slot, bus_slot_free);
_public_ sd_bus* sd_bus_slot_get_bus(sd_bus_slot *slot) {
assert_return(slot, NULL);
return slot->bus;
}
_public_ void *sd_bus_slot_get_userdata(sd_bus_slot *slot) {
assert_return(slot, NULL);
return slot->userdata;
}
_public_ void *sd_bus_slot_set_userdata(sd_bus_slot *slot, void *userdata) {
void *ret;
assert_return(slot, NULL);
ret = slot->userdata;
slot->userdata = userdata;
return ret;
}
_public_ int sd_bus_slot_set_destroy_callback(sd_bus_slot *slot, sd_bus_destroy_t callback) {
assert_return(slot, -EINVAL);
slot->destroy_callback = callback;
return 0;
}
_public_ int sd_bus_slot_get_destroy_callback(sd_bus_slot *slot, sd_bus_destroy_t *callback) {
assert_return(slot, -EINVAL);
if (callback)
*callback = slot->destroy_callback;
return !!slot->destroy_callback;
}
_public_ sd_bus_message *sd_bus_slot_get_current_message(sd_bus_slot *slot) {
assert_return(slot, NULL);
assert_return(slot->type >= 0, NULL);
if (slot->bus->current_slot != slot)
return NULL;
return slot->bus->current_message;
}
_public_ sd_bus_message_handler_t sd_bus_slot_get_current_handler(sd_bus_slot *slot) {
assert_return(slot, NULL);
assert_return(slot->type >= 0, NULL);
if (slot->bus->current_slot != slot)
return NULL;
return slot->bus->current_handler;
}
_public_ void* sd_bus_slot_get_current_userdata(sd_bus_slot *slot) {
assert_return(slot, NULL);
assert_return(slot->type >= 0, NULL);
if (slot->bus->current_slot != slot)
return NULL;
return slot->bus->current_userdata;
}
_public_ int sd_bus_slot_get_floating(sd_bus_slot *slot) {
assert_return(slot, -EINVAL);
return slot->floating;
}
_public_ int sd_bus_slot_set_floating(sd_bus_slot *slot, int b) {
assert_return(slot, -EINVAL);
if (slot->floating == !!b)
return 0;
if (!slot->bus) /* already disconnected slots can't be reconnected */
return -ESTALE;
slot->floating = b;
/* When a slot is "floating" then the bus references the slot. Otherwise the slot references the bus. Hence,
* when we move from one to the other, let's increase one reference and decrease the other. */
if (b) {
sd_bus_slot_ref(slot);
sd_bus_unref(slot->bus);
} else {
sd_bus_ref(slot->bus);
sd_bus_slot_unref(slot);
}
return 1;
}
_public_ int sd_bus_slot_set_description(sd_bus_slot *slot, const char *description) {
assert_return(slot, -EINVAL);
return free_and_strdup(&slot->description, description);
}
_public_ int sd_bus_slot_get_description(sd_bus_slot *slot, const char **description) {
assert_return(slot, -EINVAL);
assert_return(description, -EINVAL);
if (slot->description)
*description = slot->description;
else if (slot->type == BUS_MATCH_CALLBACK)
*description = slot->match_callback.match_string;
else
return -ENXIO;
return 0;
}
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