+static int synthetic_driver_send(sd_bus *b, sd_bus_message *m) {
+ int r;
+
+ assert(b);
+ assert(m);
+
+ r = bus_message_append_sender(m, "org.freedesktop.DBus");
+ if (r < 0)
+ return r;
+
+ r = bus_seal_synthetic_message(b, m);
+ if (r < 0)
+ return r;
+
+ return sd_bus_send(b, m, NULL);
+}
+
+static int synthetic_reply_method_error(sd_bus_message *call, const sd_bus_error *e) {
+ _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
+ int r;
+
+ assert(call);
+
+ if (call->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED)
+ return 0;
+
+ r = sd_bus_message_new_method_error(call, &m, e);
+ if (r < 0)
+ return r;
+
+ return synthetic_driver_send(call->bus, m);
+}
+
+static int synthetic_reply_method_errno(sd_bus_message *call, int error, const sd_bus_error *p) {
+
+ _cleanup_bus_error_free_ sd_bus_error berror = SD_BUS_ERROR_NULL;
+
+ assert(call);
+
+ if (call->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED)
+ return 0;
+
+ if (sd_bus_error_is_set(p))
+ return synthetic_reply_method_error(call, p);
+
+ sd_bus_error_set_errno(&berror, error);
+
+ return synthetic_reply_method_error(call, &berror);
+}
+
+static int synthetic_reply_method_return(sd_bus_message *call, const char *types, ...) {
+ _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
+ int r;
+
+ assert(call);
+
+ if (call->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED)
+ return 0;
+
+ r = sd_bus_message_new_method_return(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 synthetic_driver_send(call->bus, m);
+}
+
+static int synthetic_reply_return_strv(sd_bus_message *call, char **l) {
+ _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
+ int r;
+
+ assert(call);
+
+ r = sd_bus_message_new_method_return(call, &m);
+ if (r < 0)
+ return synthetic_reply_method_errno(call, r, NULL);
+
+ r = sd_bus_message_append_strv(m, l);
+ if (r < 0)
+ return synthetic_reply_method_errno(call, r, NULL);
+
+ return synthetic_driver_send(call->bus, m);
+}
+
+static int get_creds_by_name(sd_bus *bus, const char *name, uint64_t mask, sd_bus_creds **_creds, sd_bus_error *error) {
+ _cleanup_bus_creds_unref_ sd_bus_creds *c = NULL;
+ int r;
+
+ assert(bus);
+ assert(name);
+ assert(_creds);
+
+ r = sd_bus_get_name_creds(bus, name, mask, &c);
+ if (r == -ESRCH || r == -ENXIO)
+ return sd_bus_error_setf(error, SD_BUS_ERROR_NAME_HAS_NO_OWNER, "Name %s is currently not owned by anyone.", name);
+ if (r < 0)
+ return r;
+
+ if ((c->mask & mask) != mask)
+ return -ENOTSUP;
+
+ *_creds = c;
+ c = NULL;
+
+ return 0;
+}
+
+static int get_creds_by_message(sd_bus *bus, sd_bus_message *m, uint64_t mask, sd_bus_creds **_creds, sd_bus_error *error) {
+ const char *name;
+ int r;
+
+ assert(bus);
+ assert(m);
+ assert(_creds);
+
+ r = sd_bus_message_read(m, "s", &name);
+ if (r < 0)
+ return r;
+
+ return get_creds_by_name(bus, name, mask, _creds, error);
+}
+
+static int process_driver(sd_bus *a, sd_bus *b, sd_bus_message *m, Policy *policy, const struct ucred *ucred, Set *owned_names) {
+ int r;
+
+ assert(a);
+ assert(b);
+ assert(m);
+
+ if (!a->is_kernel)
+ return 0;
+
+ if (!streq_ptr(sd_bus_message_get_destination(m), "org.freedesktop.DBus"))
+ return 0;
+
+ /* The "Hello()" call is is handled in process_hello() */
+
+ if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus.Introspectable", "Introspect")) {
+
+ if (!sd_bus_message_has_signature(m, ""))
+ return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid parameters"));
+
+ return synthetic_reply_method_return(m, "s",
+ "<!DOCTYPE node PUBLIC \"-//freedesktop//DTD D-BUS Object Introspection 1.0//EN\" "
+ "\"http://www.freedesktop.org/standards/dbus/1.0/introspect.dtd\">\n"
+ "<node>\n"
+ " <interface name=\"org.freedesktop.DBus.Introspectable\">\n"
+ " <method name=\"Introspect\">\n"
+ " <arg name=\"data\" type=\"s\" direction=\"out\"/>\n"
+ " </method>\n"
+ " </interface>\n"
+ " <interface name=\"org.freedesktop.DBus\">\n"
+ " <method name=\"AddMatch\">\n"
+ " <arg type=\"s\" direction=\"in\"/>\n"
+ " </method>\n"
+ " <method name=\"RemoveMatch\">\n"
+ " <arg type=\"s\" direction=\"in\"/>\n"
+ " </method>\n"
+ " <method name=\"GetConnectionSELinuxSecurityContext\">\n"
+ " <arg type=\"s\" direction=\"in\"/>\n"
+ " <arg type=\"ay\" direction=\"out\"/>\n"
+ " </method>\n"
+ " <method name=\"GetConnectionUnixProcessID\">\n"
+ " <arg type=\"s\" direction=\"in\"/>\n"
+ " <arg type=\"u\" direction=\"out\"/>\n"
+ " </method>\n"
+ " <method name=\"GetConnectionUnixUser\">\n"
+ " <arg type=\"s\" direction=\"in\"/>\n"
+ " <arg type=\"u\" direction=\"out\"/>\n"
+ " </method>\n"
+ " <method name=\"GetId\">\n"
+ " <arg type=\"s\" direction=\"out\"/>\n"
+ " </method>\n"
+ " <method name=\"GetNameOwner\">\n"
+ " <arg type=\"s\" direction=\"in\"/>\n"
+ " <arg type=\"s\" direction=\"out\"/>\n"
+ " </method>\n"
+ " <method name=\"Hello\">\n"
+ " <arg type=\"s\" direction=\"out\"/>\n"
+ " </method>\n"
+ " <method name=\"ListActivatableNames\">\n"
+ " <arg type=\"as\" direction=\"out\"/>\n"
+ " </method>\n"
+ " <method name=\"ListNames\">\n"
+ " <arg type=\"as\" direction=\"out\"/>\n"
+ " </method>\n"
+ " <method name=\"ListQueuedOwners\">\n"
+ " <arg type=\"s\" direction=\"in\"/>\n"
+ " <arg type=\"as\" direction=\"out\"/>\n"
+ " </method>\n"
+ " <method name=\"NameHasOwner\">\n"
+ " <arg type=\"s\" direction=\"in\"/>\n"
+ " <arg type=\"b\" direction=\"out\"/>\n"
+ " </method>\n"
+ " <method name=\"ReleaseName\">\n"
+ " <arg type=\"s\" direction=\"in\"/>\n"
+ " <arg type=\"u\" direction=\"out\"/>\n"
+ " </method>\n"
+ " <method name=\"ReloadConfig\">\n"
+ " </method>\n"
+ " <method name=\"RequestName\">\n"
+ " <arg type=\"s\" direction=\"in\"/>\n"
+ " <arg type=\"u\" direction=\"in\"/>\n"
+ " <arg type=\"u\" direction=\"out\"/>\n"
+ " </method>\n"
+ " <method name=\"StartServiceByName\">\n"
+ " <arg type=\"s\" direction=\"in\"/>\n"
+ " <arg type=\"u\" direction=\"in\"/>\n"
+ " <arg type=\"u\" direction=\"out\"/>\n"
+ " </method>\n"
+ " <method name=\"UpdateActivationEnvironment\">\n"
+ " <arg type=\"a{ss}\" direction=\"in\"/>\n"
+ " </method>\n"
+ " <signal name=\"NameAcquired\">\n"
+ " <arg type=\"s\"/>\n"
+ " </signal>\n"
+ " <signal name=\"NameLost\">\n"
+ " <arg type=\"s\"/>\n"
+ " </signal>\n"
+ " <signal name=\"NameOwnerChanged\">\n"
+ " <arg type=\"s\"/>\n"
+ " <arg type=\"s\"/>\n"
+ " <arg type=\"s\"/>\n"
+ " </signal>\n"
+ " </interface>\n"
+ "</node>\n");
+
+ } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "AddMatch")) {
+ const char *match;
+
+ if (!sd_bus_message_has_signature(m, "s"))
+ return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid parameters"));
+
+ r = sd_bus_message_read(m, "s", &match);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ r = sd_bus_add_match(a, NULL, match, NULL, NULL);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ return synthetic_reply_method_return(m, NULL);
+
+ } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "RemoveMatch")) {
+ const char *match;
+
+ if (!sd_bus_message_has_signature(m, "s"))
+ return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid parameters"));
+
+ r = sd_bus_message_read(m, "s", &match);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ r = bus_remove_match_by_string(a, match, NULL, NULL);
+ if (r == 0)
+ return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_MATCH_RULE_NOT_FOUND, "Match rule not found"));
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ return synthetic_reply_method_return(m, NULL);
+
+ } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "GetConnectionSELinuxSecurityContext")) {
+ _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
+ _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
+
+ if (!sd_bus_message_has_signature(m, "s"))
+ return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid parameters"));
+
+ r = get_creds_by_message(a, m, SD_BUS_CREDS_SELINUX_CONTEXT, &creds, &error);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, &error);
+
+ return synthetic_reply_method_return(m, "y", creds->label, strlen(creds->label));
+
+ } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "GetConnectionUnixProcessID")) {
+ _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
+ _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
+
+ if (!sd_bus_message_has_signature(m, "s"))
+ return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid parameters"));
+
+ r = get_creds_by_message(a, m, SD_BUS_CREDS_PID, &creds, &error);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, &error);
+
+ return synthetic_reply_method_return(m, "u", (uint32_t) creds->pid);
+
+ } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "GetConnectionUnixUser")) {
+ _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
+ _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
+
+ if (!sd_bus_message_has_signature(m, "s"))
+ return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid parameters"));
+
+ r = get_creds_by_message(a, m, SD_BUS_CREDS_UID, &creds, &error);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, &error);
+
+ return synthetic_reply_method_return(m, "u", (uint32_t) creds->uid);
+
+ } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "GetId")) {
+ sd_id128_t server_id;
+ char buf[SD_ID128_STRING_MAX];
+
+ if (!sd_bus_message_has_signature(m, ""))
+ return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid parameters"));
+
+ r = sd_bus_get_bus_id(a, &server_id);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ return synthetic_reply_method_return(m, "s", sd_id128_to_string(server_id, buf));
+
+ } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "GetNameOwner")) {
+ const char *name;
+ _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
+ _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
+
+ if (!sd_bus_message_has_signature(m, "s"))
+ return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid parameters"));
+
+ r = sd_bus_message_read(m, "s", &name);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ if (streq(name, "org.freedesktop.DBus"))
+ return synthetic_reply_method_return(m, "s", "org.freedesktop.DBus");
+
+ r = get_creds_by_name(a, name, SD_BUS_CREDS_UNIQUE_NAME, &creds, &error);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, &error);
+
+ return synthetic_reply_method_return(m, "s", creds->unique_name);
+
+ } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "ListActivatableNames")) {
+ _cleanup_strv_free_ char **names = NULL;
+
+ if (!sd_bus_message_has_signature(m, ""))
+ return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid parameters"));
+
+ r = sd_bus_list_names(a, NULL, &names);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ /* Let's sort the names list to make it stable */
+ strv_sort(names);
+
+ return synthetic_reply_return_strv(m, names);
+
+ } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "ListNames")) {
+ _cleanup_strv_free_ char **names = NULL;
+
+ if (!sd_bus_message_has_signature(m, ""))
+ return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid parameters"));
+
+ r = sd_bus_list_names(a, &names, NULL);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ r = strv_extend(&names, "org.freedesktop.DBus");
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ /* Let's sort the names list to make it stable */
+ strv_sort(names);
+
+ return synthetic_reply_return_strv(m, names);
+
+ } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "ListQueuedOwners")) {
+ struct kdbus_cmd_name_list cmd = {};
+ struct kdbus_name_list *name_list;
+ struct kdbus_name_info *name;
+ _cleanup_strv_free_ char **owners = NULL;
+ _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
+ char *arg0;
+ int err = 0;
+
+ if (!sd_bus_message_has_signature(m, "s"))
+ return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid parameters"));
+
+ r = sd_bus_message_read(m, "s", &arg0);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ r = sd_bus_get_name_creds(a, arg0, 0, NULL);
+ if (r == -ESRCH || r == -ENXIO) {
+ sd_bus_error_setf(&error, SD_BUS_ERROR_NAME_HAS_NO_OWNER, "Could not get owners of name '%s': no such name.", arg0);
+ return synthetic_reply_method_errno(m, r, &error);
+ }
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ cmd.flags = KDBUS_NAME_LIST_QUEUED;
+ r = ioctl(a->input_fd, KDBUS_CMD_NAME_LIST, &cmd);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, -errno, NULL);
+
+ name_list = (struct kdbus_name_list *) ((uint8_t *) a->kdbus_buffer + cmd.offset);
+
+ KDBUS_ITEM_FOREACH(name, name_list, names) {
+ const char *entry_name = NULL;
+ struct kdbus_item *item;
+ char *n;
+
+ KDBUS_ITEM_FOREACH(item, name, items)
+ if (item->type == KDBUS_ITEM_OWNED_NAME)
+ entry_name = item->name.name;
+
+ if (!streq_ptr(entry_name, arg0))
+ continue;
+
+ if (asprintf(&n, ":1.%llu", (unsigned long long) name->owner_id) < 0) {
+ err = -ENOMEM;
+ break;
+ }
+
+ r = strv_consume(&owners, n);
+ if (r < 0) {
+ err = r;
+ break;
+ }
+ }
+
+ r = bus_kernel_cmd_free(a, cmd.offset);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ if (err < 0)
+ return synthetic_reply_method_errno(m, err, NULL);
+
+ return synthetic_reply_return_strv(m, owners);
+
+ } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "NameHasOwner")) {
+ const char *name;
+
+ if (!sd_bus_message_has_signature(m, "s"))
+ return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid parameters"));
+
+ r = sd_bus_message_read(m, "s", &name);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ if (streq(name, "org.freedesktop.DBus"))
+ return synthetic_reply_method_return(m, "b", true);
+
+ r = sd_bus_get_name_creds(a, name, 0, NULL);
+ if (r < 0 && r != -ESRCH && r != -ENXIO)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ return synthetic_reply_method_return(m, "b", r >= 0);
+
+ } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "ReleaseName")) {
+ const char *name;
+
+ if (!sd_bus_message_has_signature(m, "s"))
+ return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid parameters"));
+
+ r = sd_bus_message_read(m, "s", &name);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ r = sd_bus_release_name(a, name);
+ if (r < 0) {
+ if (r == -ESRCH)
+ return synthetic_reply_method_return(m, "u", BUS_NAME_NON_EXISTENT);
+ if (r == -EADDRINUSE)
+ return synthetic_reply_method_return(m, "u", BUS_NAME_NOT_OWNER);
+
+ return synthetic_reply_method_errno(m, r, NULL);
+ }
+
+ set_remove(owned_names, (char*) name);
+
+ return synthetic_reply_method_return(m, "u", BUS_NAME_RELEASED);
+
+ } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "ReloadConfig")) {
+ _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
+
+ if (!sd_bus_message_has_signature(m, ""))
+ return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid parameters"));
+
+ r = sd_bus_error_setf(&error, SD_BUS_ERROR_NOT_SUPPORTED, "%s() is not supported", sd_bus_message_get_member(m));
+
+ return synthetic_reply_method_errno(m, r, &error);
+
+ } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "RequestName")) {
+ const char *name;
+ uint32_t flags, param;
+ bool in_queue;
+
+ if (!sd_bus_message_has_signature(m, "su"))
+ return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid parameters"));
+
+ r = sd_bus_message_read(m, "su", &name, &flags);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ if (policy && !policy_check_own(policy, ucred->uid, ucred->gid, name))
+ return synthetic_reply_method_errno(m, -EPERM, NULL);
+
+ if ((flags & ~(BUS_NAME_ALLOW_REPLACEMENT|BUS_NAME_REPLACE_EXISTING|BUS_NAME_DO_NOT_QUEUE)) != 0)
+ return synthetic_reply_method_errno(m, -EINVAL, NULL);
+
+ param = 0;
+ if (flags & BUS_NAME_ALLOW_REPLACEMENT)
+ param |= SD_BUS_NAME_ALLOW_REPLACEMENT;
+ if (flags & BUS_NAME_REPLACE_EXISTING)
+ param |= SD_BUS_NAME_REPLACE_EXISTING;
+ if (!(flags & BUS_NAME_DO_NOT_QUEUE))
+ param |= SD_BUS_NAME_QUEUE;
+
+ r = set_put_strdup(owned_names, name);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ r = sd_bus_request_name(a, name, param);
+ if (r < 0) {
+ if (r == -EALREADY)
+ return synthetic_reply_method_return(m, "u", BUS_NAME_ALREADY_OWNER);
+
+ set_remove(owned_names, (char*) name);
+
+ if (r == -EEXIST)
+ return synthetic_reply_method_return(m, "u", BUS_NAME_EXISTS);
+ return synthetic_reply_method_errno(m, r, NULL);
+ }
+
+ in_queue = (r == 0);
+
+ if (in_queue)
+ return synthetic_reply_method_return(m, "u", BUS_NAME_IN_QUEUE);
+
+ return synthetic_reply_method_return(m, "u", BUS_NAME_PRIMARY_OWNER);
+
+ } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "StartServiceByName")) {
+ _cleanup_bus_message_unref_ sd_bus_message *msg = NULL;
+ const char *name;
+ uint32_t flags;
+
+ if (!sd_bus_message_has_signature(m, "su"))
+ return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid parameters"));
+
+ r = sd_bus_message_read(m, "su", &name, &flags);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ if (flags != 0)
+ return synthetic_reply_method_errno(m, -EINVAL, NULL);
+
+ r = sd_bus_get_name_creds(a, name, 0, NULL);
+ if (r >= 0 || streq(name, "org.freedesktop.DBus"))
+ return synthetic_reply_method_return(m, "u", BUS_START_REPLY_ALREADY_RUNNING);
+ if (r != -ESRCH)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ r = sd_bus_message_new_method_call(
+ a,
+ &msg,
+ name,
+ "/",
+ "org.freedesktop.DBus.Peer",
+ "Ping");
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ r = sd_bus_send(a, msg, NULL);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ return synthetic_reply_method_return(m, "u", BUS_START_REPLY_SUCCESS);
+
+ } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "UpdateActivationEnvironment")) {
+ _cleanup_bus_message_unref_ sd_bus_message *msg = NULL;
+ _cleanup_strv_free_ char **args = NULL;
+
+ if (!sd_bus_message_has_signature(m, "a{ss}"))
+ return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid parameters"));
+
+ r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, "{ss}");
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ while ((r = sd_bus_message_enter_container(m, SD_BUS_TYPE_DICT_ENTRY, "ss")) > 0) {
+ _cleanup_free_ char *s = NULL;
+ const char *key;
+ const char *value;
+
+ r = sd_bus_message_read(m, "ss", &key, &value);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ s = strjoin(key, "=", value, NULL);
+ if (!s)
+ return synthetic_reply_method_errno(m, -ENOMEM, NULL);
+
+ r = strv_extend(&args, s);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ r = sd_bus_message_exit_container(m);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+ }
+
+ r = sd_bus_message_exit_container(m);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ if (!args)
+ return synthetic_reply_method_errno(m, -EINVAL, NULL);
+
+ r = sd_bus_message_new_method_call(
+ a,
+ &msg,
+ "org.freedesktop.systemd1",
+ "/org/freedesktop/systemd1",
+ "org.freedesktop.systemd1.Manager",
+ "SetEnvironment");
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ r = sd_bus_message_append_strv(msg, args);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ r = sd_bus_call(a, msg, 0, NULL, NULL);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ return synthetic_reply_method_return(m, NULL);
+
+ } else {
+ _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
+
+ r = sd_bus_error_setf(&error, SD_BUS_ERROR_UNKNOWN_METHOD, "Unknown method '%s'.", m->member);
+
+ return synthetic_reply_method_errno(m, r, &error);
+ }
+}
+
+static int process_policy(sd_bus *from, sd_bus *to, sd_bus_message *m, Policy *policy, const struct ucred *our_ucred, Set *owned_names) {
+ int r;
+
+ assert(from);
+ assert(to);
+ assert(m);
+
+ if (!policy)
+ return 0;
+
+ if (from->is_kernel) {
+ uid_t sender_uid = UID_INVALID;
+ gid_t sender_gid = GID_INVALID;
+ char **sender_names = NULL;
+ bool granted = false;
+
+ /* Driver messages are always OK */
+ if (streq_ptr(m->sender, "org.freedesktop.DBus"))
+ return 0;
+
+ /* The message came from the kernel, and is sent to our legacy client. */
+ r = sd_bus_creds_get_well_known_names(&m->creds, &sender_names);
+ if (r < 0)
+ return r;
+
+ (void) sd_bus_creds_get_uid(&m->creds, &sender_uid);
+ (void) sd_bus_creds_get_gid(&m->creds, &sender_gid);
+
+ /* First check whether the sender can send the message to our name */
+ if (set_isempty(owned_names)) {
+ if (policy_check_send(policy, sender_uid, sender_gid, m->header->type, NULL, m->path, m->interface, m->member))
+ granted = true;
+ } else {
+ Iterator i;
+ char *n;
+
+ SET_FOREACH(n, owned_names, i)
+ if (policy_check_send(policy, sender_uid, sender_gid, m->header->type, n, m->path, m->interface, m->member)) {
+ granted = true;
+ break;
+ }
+ }
+
+ if (granted) {
+ /* Then check whether us, the recipient can recieve from the sender's name */
+ if (strv_isempty(sender_names)) {
+ if (policy_check_recv(policy, our_ucred->uid, our_ucred->gid, m->header->type, NULL, m->path, m->interface, m->member))
+ return 0;
+ } else {
+ char **n;
+
+ STRV_FOREACH(n, sender_names) {
+ if (policy_check_recv(policy, our_ucred->uid, our_ucred->gid, m->header->type, *n, m->path, m->interface, m->member))
+ return 0;
+ }
+ }
+ }
+
+ /* Return an error back to the caller */
+ if (m->header->type == SD_BUS_MESSAGE_METHOD_CALL)
+ return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_ACCESS_DENIED, "Access prohibited by XML receiver policy.");
+
+ /* Return 1, indicating that the message shall not be processed any further */
+ return 1;
+ }
+
+ if (to->is_kernel) {
+ _cleanup_bus_creds_unref_ sd_bus_creds *destination_creds = NULL;
+ uid_t destination_uid = UID_INVALID;
+ gid_t destination_gid = GID_INVALID;
+ const char *destination_unique = NULL;
+ char **destination_names = NULL;
+ bool granted = false;
+
+ /* Driver messages are always OK */
+ if (streq_ptr(m->destination, "org.freedesktop.DBus"))
+ return 0;
+
+ /* The message came from the legacy client, and is sent to kdbus. */
+ if (m->destination) {
+ r = sd_bus_get_name_creds(to, m->destination,
+ SD_BUS_CREDS_WELL_KNOWN_NAMES|SD_BUS_CREDS_UNIQUE_NAME|
+ SD_BUS_CREDS_UID|SD_BUS_CREDS_GID|SD_BUS_CREDS_PID, &destination_creds);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_creds_get_well_known_names(destination_creds, &destination_names);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_creds_get_unique_name(destination_creds, &destination_unique);
+ if (r < 0)
+ return r;
+
+ (void) sd_bus_creds_get_uid(destination_creds, &destination_uid);
+ (void) sd_bus_creds_get_gid(destination_creds, &destination_gid);
+ }
+
+ /* First check if we, the sender can send to this name */
+ if (strv_isempty(destination_names)) {
+ if (policy_check_send(policy, our_ucred->uid, our_ucred->gid, m->header->type, NULL, m->path, m->interface, m->member))
+ granted = true;
+ } else {
+ char **n;
+
+ STRV_FOREACH(n, destination_names) {
+ if (policy_check_send(policy, our_ucred->uid, our_ucred->gid, m->header->type, *n, m->path, m->interface, m->member)) {
+
+ /* If we made a receiver decision,
+ then remember which name's policy
+ we used, and to which unique ID it
+ mapped when we made the
+ decision. Then, let's pass this to
+ the kernel when sending the
+ message, so that it refuses the
+ operation should the name and
+ unique ID not map to each other
+ anymore. */
+
+ r = free_and_strdup(&m->destination_ptr, *n);
+ if (r < 0)
+ return r;
+
+ r = bus_kernel_parse_unique_name(destination_unique, &m->verify_destination_id);
+ if (r < 0)
+ break;
+
+ granted = true;
+ break;
+ }
+ }
+ }
+
+ /* Then check if the recipient can receive from our name */
+ if (granted) {
+ if (set_isempty(owned_names)) {
+ if (policy_check_recv(policy, destination_uid, destination_gid, m->header->type, NULL, m->path, m->interface, m->member))
+ return 0;
+ } else {
+ Iterator i;
+ char *n;
+
+ SET_FOREACH(n, owned_names, i)
+ if (policy_check_recv(policy, destination_uid, destination_gid, m->header->type, n, m->path, m->interface, m->member))
+ return 0;
+ }
+ }
+
+ /* Return an error back to the caller */
+ if (m->header->type == SD_BUS_MESSAGE_METHOD_CALL)
+ return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_ACCESS_DENIED, "Access prohibited by XML sender policy.");
+
+ /* Return 1, indicating that the message shall not be processed any further */
+ return 1;
+ }
+
+ return 0;
+}
+