257 lines
8.5 KiB
C
257 lines
8.5 KiB
C
/* Simple sanity-check for D-Bus message serialization.
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*
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* Author: Simon McVittie <simon.mcvittie@collabora.co.uk>
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* Copyright © 2010-2011 Nokia Corporation
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation files
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* (the "Software"), to deal in the Software without restriction,
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* including without limitation the rights to use, copy, modify, merge,
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* publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <config.h>
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#include <glib.h>
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#include <dbus/dbus.h>
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#include <dbus/dbus-glib-lowlevel.h>
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typedef struct {
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DBusError e;
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} Fixture;
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static void
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assert_no_error (const DBusError *e)
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{
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if (G_UNLIKELY (dbus_error_is_set (e)))
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g_error ("expected success but got error: %s: %s", e->name, e->message);
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}
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static void
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setup (Fixture *f,
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gconstpointer arg G_GNUC_UNUSED)
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{
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dbus_error_init (&f->e);
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}
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/* this is meant to be obviously correct, not efficient! */
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static guint32
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get_uint32 (const gchar *blob,
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gsize offset,
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char endian)
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{
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if (endian == 'l')
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{
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return
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blob[offset] |
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(blob[offset + 1] << 8) |
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(blob[offset + 2] << 16) |
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(blob[offset + 3] << 24);
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}
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else if (endian == 'B')
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{
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return
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(blob[offset] << 24) |
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(blob[offset + 1] << 16) |
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(blob[offset + 2] << 8) |
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blob[offset + 3];
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}
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else
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{
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g_assert_not_reached ();
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}
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}
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#define BLOB_LENGTH (sizeof (le_blob) - 1)
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#define OFFSET_BODY_LENGTH (4)
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#define OFFSET_SERIAL (8)
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const gchar le_blob[] =
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/* byte 0 */
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/* yyyyuu fixed headers */
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"l" /* little-endian */
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"\2" /* reply (which is the simplest message) */
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"\2" /* no auto-starting */
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"\1" /* D-Bus version = 1 */
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/* byte 4 */
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"\4\0\0\0" /* bytes in body = 4 */
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/* byte 8 */
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"\x78\x56\x34\x12" /* serial number = 0x12345678 */
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/* byte 12 */
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/* a(uv) variable headers start here */
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"\x0f\0\0\0" /* bytes in array of variable headers = 15 */
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/* pad to 8-byte boundary = nothing */
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/* byte 16 */
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"\5" /* in reply to: */
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"\1u\0" /* variant signature = u */
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/* pad to 4-byte boundary = nothing */
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"\x12\xef\xcd\xab" /* 0xabcdef12 */
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/* pad to 8-byte boundary = nothing */
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/* byte 24 */
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"\x08" /* signature: */
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"\1g\0" /* variant signature = g */
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"\1u\0" /* 1 byte, u, NUL (no alignment needed) */
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"\0" /* pad to 8-byte boundary for body */
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/* body; byte 32 */
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"\xef\xbe\xad\xde" /* 0xdeadbeef */
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;
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const gchar be_blob[] =
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/* byte 0 */
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/* yyyyuu fixed headers */
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"B" /* big-endian */
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"\2" /* reply (which is the simplest message) */
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"\2" /* no auto-starting */
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"\1" /* D-Bus version = 1 */
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/* byte 4 */
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"\0\0\0\4" /* bytes in body = 4 */
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/* byte 8 */
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"\x12\x34\x56\x78" /* serial number = 0x12345678 */
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/* byte 12 */
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/* a(uv) variable headers start here */
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"\0\0\0\x0f" /* bytes in array of variable headers = 15 */
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/* pad to 8-byte boundary = nothing */
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/* byte 16 */
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"\5" /* in reply to: */
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"\1u\0" /* variant signature = u */
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/* pad to 4-byte boundary = nothing */
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"\xab\xcd\xef\x12" /* 0xabcdef12 */
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/* pad to 8-byte boundary = nothing */
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/* byte 24 */
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"\x08" /* signature: */
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"\1g\0" /* variant signature = g */
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"\1u\0" /* 1 byte, u, NUL (no alignment needed) */
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"\0" /* pad to 8-byte boundary for body */
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/* body; byte 32 */
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"\xde\xad\xbe\xef" /* 0xdeadbeef */
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;
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static void
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test_endian (Fixture *f,
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gconstpointer arg)
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{
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const gchar *blob = arg;
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char *output;
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DBusMessage *m;
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int len;
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dbus_uint32_t u;
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dbus_bool_t ok;
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g_assert_cmpuint ((guint) sizeof (le_blob), ==, (guint) sizeof (be_blob));
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g_assert_cmpuint (get_uint32 (blob, OFFSET_BODY_LENGTH, blob[0]), ==, 4);
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g_assert_cmpuint (get_uint32 (blob, OFFSET_SERIAL, blob[0]), ==,
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0x12345678u);
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len = dbus_message_demarshal_bytes_needed (blob, sizeof (le_blob));
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/* everything in the string except the implicit "\0" at the end is part of
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* the message */
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g_assert_cmpint (len, ==, BLOB_LENGTH);
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m = dbus_message_demarshal (blob, sizeof (le_blob), &f->e);
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assert_no_error (&f->e);
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g_assert (m != NULL);
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g_assert_cmpuint (dbus_message_get_serial (m), ==, 0x12345678u);
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g_assert_cmpuint (dbus_message_get_reply_serial (m), ==, 0xabcdef12u);
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g_assert_cmpstr (dbus_message_get_signature (m), ==, "u");
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/* Implementation detail: appending to the message results in it being
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* byteswapped into compiler byte order, which exposed a bug in libdbus,
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* fd.o #38120. (If that changes, this test might not exercise that
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* particular bug but will still be valid.) */
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u = 0xdecafbadu;
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ok = dbus_message_append_args (m,
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DBUS_TYPE_UINT32, &u,
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DBUS_TYPE_INVALID);
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g_assert (ok);
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dbus_message_marshal (m, &output, &len);
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g_assert (output[0] == 'l' || output[0] == 'B');
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/* the single-byte fields are unaffected, even if the endianness was
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* swapped */
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g_assert_cmpint (output[1], ==, blob[1]);
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g_assert_cmpint (output[2], ==, blob[2]);
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g_assert_cmpint (output[3], ==, blob[3]);
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/* the length and serial are in the new endianness, the length has expanded
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* to 8, and the serial is correct */
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g_assert_cmpuint (get_uint32 (output, OFFSET_BODY_LENGTH, output[0]), ==, 8);
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g_assert_cmpuint (get_uint32 (output, OFFSET_SERIAL, output[0]), ==,
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0x12345678u);
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/* the second "u" in the signature replaced a padding byte, so only
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* the length of the body changed */
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g_assert_cmpint (len, ==, BLOB_LENGTH + 4);
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}
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static void
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test_needed (Fixture *f,
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gconstpointer arg)
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{
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const gchar *blob = arg;
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/* We need at least 16 bytes to know how long the message is - that's just
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* a fact of the D-Bus protocol. */
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g_assert_cmpint (
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dbus_message_demarshal_bytes_needed (blob, 0), ==, 0);
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g_assert_cmpint (
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dbus_message_demarshal_bytes_needed (blob, 15), ==, 0);
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/* This is enough that we should be able to tell how much we need. */
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g_assert_cmpint (
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dbus_message_demarshal_bytes_needed (blob, 16), ==, BLOB_LENGTH);
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/* The header is 32 bytes long (here), so that's another interesting
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* boundary. */
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g_assert_cmpint (
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dbus_message_demarshal_bytes_needed (blob, 31), ==, BLOB_LENGTH);
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g_assert_cmpint (
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dbus_message_demarshal_bytes_needed (blob, 32), ==, BLOB_LENGTH);
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g_assert_cmpint (
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dbus_message_demarshal_bytes_needed (blob, 33), ==, BLOB_LENGTH);
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g_assert_cmpint (
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dbus_message_demarshal_bytes_needed (blob, BLOB_LENGTH - 1), ==,
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BLOB_LENGTH);
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g_assert_cmpint (
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dbus_message_demarshal_bytes_needed (blob, BLOB_LENGTH), ==,
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BLOB_LENGTH);
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g_assert_cmpint (
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dbus_message_demarshal_bytes_needed (blob, sizeof (be_blob)), ==,
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BLOB_LENGTH);
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}
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static void
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teardown (Fixture *f,
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gconstpointer arg G_GNUC_UNUSED)
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{
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dbus_error_free (&f->e);
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}
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int
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main (int argc,
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char **argv)
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{
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g_test_init (&argc, &argv, NULL);
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g_test_add ("/demarshal/le", Fixture, le_blob, setup, test_endian, teardown);
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g_test_add ("/demarshal/be", Fixture, be_blob, setup, test_endian, teardown);
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g_test_add ("/demarshal/needed/le", Fixture, le_blob, setup, test_needed,
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teardown);
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g_test_add ("/demarshal/needed/be", Fixture, be_blob, setup, test_needed,
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teardown);
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return g_test_run ();
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}
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