+static int rename_service(sd_bus *a, sd_bus *b) {
+ _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
+ _cleanup_free_ char *p = NULL, *name = NULL;
+ const char *comm;
+ char **cmdline;
+ uid_t uid;
+ pid_t pid;
+ int r;
+
+ assert(a);
+ assert(b);
+
+ r = sd_bus_get_owner_creds(b, SD_BUS_CREDS_UID|SD_BUS_CREDS_PID|SD_BUS_CREDS_CMDLINE|SD_BUS_CREDS_COMM, &creds);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_creds_get_uid(creds, &uid);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_creds_get_pid(creds, &pid);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_creds_get_cmdline(creds, &cmdline);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_creds_get_comm(creds, &comm);
+ if (r < 0)
+ return r;
+
+ name = uid_to_name(uid);
+ if (!name)
+ return -ENOMEM;
+
+ p = strv_join(cmdline, " ");
+ if (!p)
+ return -ENOMEM;
+
+ /* The status string gets the full command line ... */
+ sd_notifyf(false,
+ "STATUS=Processing requests from client PID "PID_FMT" (%s); UID "UID_FMT" (%s)",
+ pid, p,
+ uid, name);
+
+ /* ... and the argv line only the short comm */
+ if (arg_command_line_buffer) {
+ size_t m, w;
+
+ m = strlen(arg_command_line_buffer);
+ w = snprintf(arg_command_line_buffer, m,
+ "[PID "PID_FMT"/%s; UID "UID_FMT"/%s]",
+ pid, comm,
+ uid, name);
+
+ if (m > w)
+ memzero(arg_command_line_buffer + w, m - w);
+ }
+
+ log_debug("Running on behalf of PID "PID_FMT" (%s), UID "UID_FMT" (%s), %s",
+ pid, p,
+ uid, name,
+ a->unique_name);
+
+ return 0;
+}
+
+static int synthesize_name_acquired(sd_bus *a, sd_bus *b, sd_bus_message *m) {
+ _cleanup_bus_message_unref_ sd_bus_message *n = NULL;
+ const char *name, *old_owner, *new_owner;
+ int r;
+
+ assert(a);
+ assert(b);
+ assert(m);
+
+ /* If we get NameOwnerChanged for our own name, we need to
+ * synthesize NameLost/NameAcquired, since socket clients need
+ * that, even though it is obsoleted on kdbus */
+
+ if (!a->is_kernel)
+ return 0;
+
+ if (!sd_bus_message_is_signal(m, "org.freedesktop.DBus", "NameOwnerChanged") ||
+ !streq_ptr(m->path, "/org/freedesktop/DBus") ||
+ !streq_ptr(m->sender, "org.freedesktop.DBus"))
+ return 0;
+
+ r = sd_bus_message_read(m, "sss", &name, &old_owner, &new_owner);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_rewind(m, true);
+ if (r < 0)
+ return r;
+
+ if (streq(old_owner, a->unique_name)) {
+
+ r = sd_bus_message_new_signal(
+ b,
+ &n,
+ "/org/freedesktop/DBus",
+ "org.freedesktop.DBus",
+ "NameLost");
+
+ } else if (streq(new_owner, a->unique_name)) {
+
+ r = sd_bus_message_new_signal(
+ b,
+ &n,
+ "/org/freedesktop/DBus",
+ "org.freedesktop.DBus",
+ "NameAcquired");
+ } else
+ return 0;
+
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_append(n, "s", name);
+ if (r < 0)
+ return r;
+
+ r = bus_message_append_sender(n, "org.freedesktop.DBus");
+ if (r < 0)
+ return r;
+
+ r = bus_seal_synthetic_message(b, n);
+ if (r < 0)
+ return r;
+
+ return sd_bus_send(b, n, NULL);
+}
+
+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);
+
+ assert_return(service_name_is_valid(name), -EINVAL);
+
+ 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 peer_is_privileged(sd_bus *bus, sd_bus_message *m) {
+ _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
+ uid_t uid;
+ int r;
+
+ r = get_creds_by_message(bus, m, SD_BUS_CREDS_UID, &creds, NULL);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_creds_get_uid(creds, &uid);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_creds_has_effective_cap(creds, CAP_SYS_ADMIN);
+ if (r > 0)
+ return true;
+
+ if (uid == getuid())
+ return true;
+
+ return false;
+}
+
+static int process_policy(sd_bus *a, sd_bus *b, sd_bus_message *m, Policy *policy, const struct ucred *ucred) {
+ int r;
+ char **name;
+ char **names_strv;
+ bool granted = false;
+ Iterator i;
+
+ assert(a);
+ assert(b);
+ assert(m);
+
+ if (!policy)
+ return 0;
+
+ if (b->is_kernel) {
+
+ /* The message came from the kernel, and is sent to our legacy client. */
+ r = sd_bus_creds_get_well_known_names(&m->creds, &names_strv);
+ if (r < 0)
+ return r;
+
+ STRV_FOREACH(name, names_strv) {
+ if (policy_check_send(policy, ucred, m->header->type, *name, m->path, m->interface, m->member)) {
+ r = free_and_strdup(&m->destination_ptr, *name);
+ if (r < 0)
+ break;
+
+ granted = true;
+ break;
+ }
+ }
+
+ if (r < 0)
+ return r;
+
+ if (!granted)
+ return -EPERM;
+
+ granted = false;
+
+ HASHMAP_FOREACH(name, names_hash, i) {
+ if (policy_check_recv(policy, ucred, m->header->type, *name, m->path, m->interface, m->member))
+ return 0;
+ }
+
+ return -EPERM;
+ } else {
+ sd_bus_creds *bus_creds;
+
+ /* The message came from the legacy client, and is sent to kdbus. */
+ r = sd_bus_get_name_creds(a, m->destination, SD_BUS_CREDS_WELL_KNOWN_NAMES, &bus_creds);
+ if (r < 0)
+ return r;
+
+ STRV_FOREACH(name, names_strv) {
+ if (policy_check_send(policy, ucred, m->header->type, *name, m->path, m->interface, m->member)) {
+ r = free_and_strdup(&m->destination_ptr, *name);
+ if (r < 0)
+ break;
+
+ r = bus_kernel_parse_unique_name(m->sender, &m->verify_destination_id);
+ if (r < 0)
+ break;
+
+ granted = true;
+ break;
+ }
+ }
+
+ if (r < 0)
+ return r;
+
+ if (!granted)
+ return -EPERM;
+
+ granted = false;
+
+ HASHMAP_FOREACH(name, names_hash, i) {
+ if (policy_check_recv(policy, ucred, m->header->type, *name, m->path, m->interface, m->member))
+ return 0;
+ }
+
+ return -EPERM;
+ }
+
+ return 0;
+}
+
+static int process_driver(sd_bus *a, sd_bus *b, sd_bus_message *m, Policy *policy, const struct ucred *ucred) {
+ 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;
+
+ if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus.Introspectable", "Introspect")) {
+ if (0 && !isempty(sd_bus_message_get_signature(m, true))) {
+ _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
+
+ r = sd_bus_error_setf(&error, SD_BUS_ERROR_INVALID_ARGS, "Expected no parameters");
+
+ return synthetic_reply_method_errno(m, r, &error);
+ }
+
+ 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;
+
+ 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;
+
+ 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;
+
+ 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;
+
+ 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;
+
+ 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];
+
+ r = sd_bus_get_owner_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;
+
+ 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);
+
+ /* "Hello" is handled in process_hello() */
+
+ } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "ListActivatableNames")) {
+ _cleanup_strv_free_ char **names = NULL;
+
+ 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;
+
+ 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_cmd_free cmd_free;
+ 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;
+
+ r = sd_bus_message_read(m, "s", &arg0);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ if (!service_name_is_valid(arg0))
+ return synthetic_reply_method_errno(m, -EINVAL, 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;
+ }
+ }
+
+ cmd_free.flags = 0;
+ cmd_free.offset = cmd.offset;
+
+ r = ioctl(a->input_fd, KDBUS_CMD_FREE, &cmd_free);
+ 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;
+
+ r = sd_bus_message_read(m, "s", &name);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ if (!service_name_is_valid(name))
+ return synthetic_reply_method_errno(m, -EINVAL, 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;
+
+ r = sd_bus_message_read(m, "s", &name);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ if (!service_name_is_valid(name))
+ return synthetic_reply_method_errno(m, -EINVAL, 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);
+ }
+
+ hashmap_remove(names_hash, 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;
+
+ 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;
+
+ 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, name))
+ return synthetic_reply_method_errno(m, -EPERM, NULL);
+
+ if (!service_name_is_valid(name))
+ return synthetic_reply_method_errno(m, -EINVAL, 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 = sd_bus_request_name(a, name, param);
+ if (r < 0) {
+ if (r == -EEXIST)
+ return synthetic_reply_method_return(m, "u", BUS_NAME_EXISTS);
+ if (r == -EALREADY)
+ return synthetic_reply_method_return(m, "u", BUS_NAME_ALREADY_OWNER);
+ return synthetic_reply_method_errno(m, r, NULL);
+ }
+
+ in_queue = (r == 0);
+
+ r = hashmap_put(names_hash, name, NULL);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ 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;
+
+ r = sd_bus_message_read(m, "su", &name, &flags);
+ if (r < 0)
+ return synthetic_reply_method_errno(m, r, NULL);
+
+ if (!service_name_is_valid(name))
+ return synthetic_reply_method_errno(m, -EINVAL, 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 (!peer_is_privileged(a, m))
+ return synthetic_reply_method_errno(m, -EPERM, NULL);
+
+ 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_hello(sd_bus *a, sd_bus *b, sd_bus_message *m, Policy *policy, const struct ucred *ucred, bool *got_hello) {
+ _cleanup_bus_message_unref_ sd_bus_message *n = NULL;
+ bool is_hello;
+ int r;
+
+ assert(a);
+ assert(b);
+ assert(m);
+ assert(got_hello);
+
+ /* As reaction to hello we need to respond with two messages:
+ * the callback reply and the NameAcquired for the unique
+ * name, since hello is otherwise obsolete on kdbus. */
+
+ is_hello =
+ sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "Hello") &&
+ streq_ptr(m->destination, "org.freedesktop.DBus");
+
+ if (!is_hello) {
+
+ if (*got_hello)
+ return 0;
+
+ log_error("First packet isn't hello (it's %s.%s), aborting.", m->interface, m->member);
+ return -EIO;
+ }
+
+ if (*got_hello) {
+ log_error("Got duplicate hello, aborting.");
+ return -EIO;
+ }
+
+ if (policy && !policy_check_hello(policy, ucred)) {
+ log_error("Policy denied HELLO");
+ return -EPERM;
+ }
+
+ *got_hello = true;
+
+ if (!a->is_kernel)
+ return 0;
+
+ r = sd_bus_message_new_method_return(m, &n);
+ if (r < 0) {
+ log_error("Failed to generate HELLO reply: %s", strerror(-r));
+ return r;
+ }
+
+ r = sd_bus_message_append(n, "s", a->unique_name);
+ if (r < 0) {
+ log_error("Failed to append unique name to HELLO reply: %s", strerror(-r));
+ return r;
+ }
+
+ r = bus_message_append_sender(n, "org.freedesktop.DBus");
+ if (r < 0) {
+ log_error("Failed to append sender to HELLO reply: %s", strerror(-r));
+ return r;
+ }
+
+ r = bus_seal_synthetic_message(b, n);
+ if (r < 0) {
+ log_error("Failed to seal HELLO reply: %s", strerror(-r));
+ return r;
+ }
+
+ r = sd_bus_send(b, n, NULL);
+ if (r < 0) {
+ log_error("Failed to send HELLO reply: %s", strerror(-r));
+ return r;
+ }
+
+ n = sd_bus_message_unref(n);
+ r = sd_bus_message_new_signal(
+ b,
+ &n,
+ "/org/freedesktop/DBus",
+ "org.freedesktop.DBus",
+ "NameAcquired");
+ if (r < 0) {
+ log_error("Failed to allocate initial NameAcquired message: %s", strerror(-r));
+ return r;
+ }
+
+ r = sd_bus_message_append(n, "s", a->unique_name);
+ if (r < 0) {
+ log_error("Failed to append unique name to NameAcquired message: %s", strerror(-r));
+ return r;
+ }
+
+ r = bus_message_append_sender(n, "org.freedesktop.DBus");
+ if (r < 0) {
+ log_error("Failed to append sender to NameAcquired message: %s", strerror(-r));
+ return r;
+ }
+
+ r = bus_seal_synthetic_message(b, n);
+ if (r < 0) {
+ log_error("Failed to seal NameAcquired message: %s", strerror(-r));
+ return r;
+ }
+
+ r = sd_bus_send(b, n, NULL);
+ if (r < 0) {
+ log_error("Failed to send NameAcquired message: %s", strerror(-r));
+ return r;
+ }
+
+ return 1;
+}
+
+static int patch_sender(sd_bus *a, sd_bus_message *m) {
+ char **well_known = NULL;
+ sd_bus_creds *c;
+ int r;
+
+ assert(a);
+ assert(m);
+
+ if (!a->is_kernel)
+ return 0;
+
+ /* We will change the sender of messages from the bus driver
+ * so that they originate from the bus driver. This is a
+ * speciality originating from dbus1, where the bus driver did
+ * not have a unique id, but only the well-known name. */
+
+ c = sd_bus_message_get_creds(m);
+ if (!c)
+ return 0;
+
+ r = sd_bus_creds_get_well_known_names(c, &well_known);
+ if (r < 0)
+ return r;
+
+ if (strv_contains(well_known, "org.freedesktop.DBus"))
+ m->sender = "org.freedesktop.DBus";
+
+ return 0;
+}
+