bus: add support for adding memfds into message payload

1 files changed, 112 insertions, 0 deletions

diff --git a/src/libsystemd-bus/test-bus-zero-copy.c b/src/libsystemd-bus/test-bus-zero-copy.c
new file mode 100644
index 0000000000..024a0bfddf
--- /dev/null
+++ b/src/libsystemd-bus/test-bus-zero-copy.c
@@ -0,0 +1,112 @@
+/*-*- 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 <fcntl.h>
+#include <sys/mman.h>
+
+#include "util.h"
+#include "log.h"
+
+#include "sd-bus.h"
+#include "sd-memfd.h"
+#include "bus-message.h"
+#include "bus-error.h"
+#include "bus-kernel.h"
+
+int main(int argc, char *argv[]) {
+        _cleanup_free_ char *bus_name = NULL, *address = NULL;
+        void *p;
+        sd_bus *a, *b;
+        int r, bus_ref;
+        sd_bus_message *m;
+        sd_memfd *f;
+
+        log_set_max_level(LOG_DEBUG);
+
+        bus_ref = bus_kernel_create("deine-mutter", &bus_name);
+        if (bus_ref == -ENOENT)
+                return EXIT_TEST_SKIP;
+
+        assert_se(bus_ref >= 0);
+
+        address = strappend("kernel:path=", bus_name);
+        assert_se(address);
+
+        r = sd_bus_new(&a);
+        assert_se(r >= 0);
+
+        r = sd_bus_new(&b);
+        assert_se(r >= 0);
+
+        r = sd_bus_set_address(a, address);
+        assert_se(r >= 0);
+
+        r = sd_bus_set_address(b, address);
+        assert_se(r >= 0);
+
+        r = sd_bus_start(a);
+        assert_se(r >= 0);
+
+        r = sd_bus_start(b);
+        assert_se(r >= 0);
+
+        r = sd_bus_message_new_method_call(b, ":1.1", "/a/path", "an.inter.face", "AMethod", &m);
+        assert_se(r >= 0);
+
+        r = sd_bus_message_open_container(m, 'r', "ayay");
+        assert_se(r >= 0);
+
+        r = sd_bus_message_append_array_space(m, 'y', 32, &p);
+        assert_se(r >= 0);
+
+        memset(p, 'L', 32);
+
+        r = sd_memfd_new_and_map(&f, 32, &p);
+        assert_se(r >= 0);
+
+        memset(p, 'P', 32);
+        munmap(p, 32);
+
+        r = sd_memfd_set_size(f, 32);
+        assert_se(r >= 0);
+
+        r = sd_bus_message_append_array_memfd(m, 'y', f);
+        assert_se(r >= 0);
+
+        r = sd_bus_message_close_container(m);
+        assert_se(r >= 0);
+
+        r = bus_message_seal(m, 55);
+        assert_se(r >= 0);
+
+        bus_message_dump(m);
+
+        r = sd_bus_send(b, m, NULL);
+        assert_se(r >= 0);
+
+        sd_bus_message_unref(m);
+
+        sd_bus_unref(a);
+        sd_bus_unref(b);
+        sd_memfd_free(f);
+
+        return 0;
+}