/* -*- mode: C; c-file-style: "gnu" -*- */
/* dbus-message.c DBusMessage object
*
- * Copyright (C) 2002 Red Hat Inc.
+ * Copyright (C) 2002, 2003 Red Hat Inc.
+ * Copyright (C) 2002, 2003 CodeFactory AB
*
* Licensed under the Academic Free License version 1.2
*
*
*/
+#include "dbus-internals.h"
+#include "dbus-marshal.h"
#include "dbus-message.h"
+#include "dbus-message-internal.h"
+#include "dbus-memory.h"
+#include "dbus-list.h"
+#include "dbus-message-builder.h"
+#include <string.h>
/**
* @defgroup DBusMessageInternals DBusMessage implementation details
* @{
*/
+enum
+{
+ FIELD_HEADER_LENGTH,
+ FIELD_BODY_LENGTH,
+ FIELD_CLIENT_SERIAL,
+ FIELD_NAME,
+ FIELD_SERVICE,
+ FIELD_SENDER,
+ FIELD_REPLY_SERIAL,
+
+ FIELD_LAST
+};
+
+static dbus_bool_t field_is_named[FIELD_LAST] =
+{
+ FALSE, /* FIELD_HEADER_LENGTH */
+ FALSE, /* FIELD_BODY_LENGTH */
+ FALSE, /* FIELD_CLIENT_SERIAL */
+ TRUE, /* FIELD_NAME */
+ TRUE, /* FIELD_SERVICE */
+ TRUE, /* FIELD_SENDER */
+ TRUE /* FIELD_REPLY_SERIAL */
+};
+
+typedef struct
+{
+ int offset; /**< Offset to start of field (location of name of field
+ * for named fields)
+ */
+} HeaderField;
+
/**
* @brief Internals of DBusMessage
*
*/
struct DBusMessage
{
+ dbus_atomic_t refcount; /**< Reference count */
+
+ DBusString header; /**< Header network data, stored
+ * separately from body so we can
+ * independently realloc it.
+ */
+
+ HeaderField header_fields[FIELD_LAST]; /**< Track the location
+ * of each field in "header"
+ */
+
+ dbus_int32_t client_serial; /**< Cached client serial value for speed */
+ dbus_int32_t reply_serial; /**< Cached reply serial value for speed */
+
+ int header_padding; /**< bytes of alignment in header */
+
+ DBusString body; /**< Body network data. */
+
+ char byte_order; /**< Message byte order. */
+
+ DBusCounter *size_counter; /**< Counter for the size of the message, or #NULL */
+ long size_counter_delta; /**< Size we incremented the size counter by. */
+
+ unsigned int locked : 1; /**< Message being sent, no modifications allowed. */
+};
+
+/**
+ * @brief Internals of DBusMessageIter
+ *
+ * Object representing a position in a message. All fields are internal.
+ */
+struct DBusMessageIter
+{
int refcount; /**< Reference count */
+
+ int pos; /**< Current position in the string */
+ DBusMessage *message; /**< Message used */
};
+/**
+ * Gets the data to be sent over the network for this message.
+ * The header and then the body should be written out.
+ * This function is guaranteed to always return the same
+ * data once a message is locked (with _dbus_message_lock()).
+ *
+ * @param message the message.
+ * @param header return location for message header data.
+ * @param body return location for message body data.
+ */
+void
+_dbus_message_get_network_data (DBusMessage *message,
+ const DBusString **header,
+ const DBusString **body)
+{
+ _dbus_assert (message->locked);
+
+ *header = &message->header;
+ *body = &message->body;
+}
+
+static void
+clear_header_padding (DBusMessage *message)
+{
+ _dbus_string_shorten (&message->header,
+ message->header_padding);
+ message->header_padding = 0;
+}
+
+static dbus_bool_t
+append_header_padding (DBusMessage *message)
+{
+ int old_len;
+ old_len = _dbus_string_get_length (&message->header);
+ if (!_dbus_string_align_length (&message->header, 8))
+ return FALSE;
+
+ message->header_padding = _dbus_string_get_length (&message->header) - old_len;
+
+ return TRUE;
+}
+
+static void
+adjust_field_offsets (DBusMessage *message,
+ int offsets_after,
+ int delta)
+{
+ int i;
+
+ if (delta == 0)
+ return;
+
+ i = 0;
+ while (i < FIELD_LAST)
+ {
+ if (message->header_fields[i].offset > offsets_after)
+ message->header_fields[i].offset += delta;
+
+ ++i;
+ }
+}
+
+static const char*
+get_string_field (DBusMessage *message,
+ int field,
+ int *len)
+{
+ int offset;
+ const char *data;
+
+ offset = message->header_fields[field].offset;
+
+ _dbus_assert (field < FIELD_LAST);
+
+ if (offset < 0)
+ return NULL;
+
+ /* offset points to string length, string data follows it */
+ /* FIXME _dbus_demarshal_const_string() that returned
+ * a reference to the string plus its len might be nice.
+ */
+
+ if (len)
+ *len = _dbus_demarshal_uint32 (&message->header,
+ message->byte_order,
+ offset,
+ NULL);
+
+ data = _dbus_string_get_const_data (&message->header);
+
+ return data + (offset + 4);
+}
+
+static dbus_int32_t
+get_int_field (DBusMessage *message,
+ int field)
+{
+ int offset;
+
+ _dbus_assert (field < FIELD_LAST);
+
+ offset = message->header_fields[field].offset;
+
+ if (offset < 0)
+ return -1; /* useless if -1 is a valid value of course */
+
+ return _dbus_demarshal_int32 (&message->header,
+ message->byte_order,
+ offset,
+ NULL);
+}
+
+static dbus_bool_t
+append_int_field (DBusMessage *message,
+ int field,
+ const char *name,
+ int value)
+{
+ int orig_len;
+
+ _dbus_assert (!message->locked);
+
+ clear_header_padding (message);
+
+ orig_len = _dbus_string_get_length (&message->header);
+
+ if (!_dbus_string_align_length (&message->header, 4))
+ goto failed;
+
+ if (!_dbus_string_append_len (&message->header, name, 4))
+ goto failed;
+
+ if (!_dbus_string_append_byte (&message->header, DBUS_TYPE_INT32))
+ goto failed;
+
+ if (!_dbus_string_align_length (&message->header, 4))
+ goto failed;
+
+ message->header_fields[FIELD_REPLY_SERIAL].offset =
+ _dbus_string_get_length (&message->header);
+
+ if (!_dbus_marshal_int32 (&message->header, message->byte_order,
+ value))
+ goto failed;
+
+ if (!append_header_padding (message))
+ goto failed;
+
+ return TRUE;
+
+ failed:
+ message->header_fields[field].offset = -1;
+ _dbus_string_set_length (&message->header, orig_len);
+
+ /* this must succeed because it was allocated on function entry and
+ * DBusString doesn't ever realloc smaller
+ */
+ if (!append_header_padding (message))
+ _dbus_assert_not_reached ("failed to reappend header padding");
+ return FALSE;
+}
+
+static dbus_bool_t
+append_string_field (DBusMessage *message,
+ int field,
+ const char *name,
+ const char *value)
+{
+ int orig_len;
+
+ _dbus_assert (!message->locked);
+
+ clear_header_padding (message);
+
+ orig_len = _dbus_string_get_length (&message->header);
+
+ if (!_dbus_string_align_length (&message->header, 4))
+ goto failed;
+
+ if (!_dbus_string_append_len (&message->header, name, 4))
+ goto failed;
+
+ if (!_dbus_string_append_byte (&message->header, DBUS_TYPE_STRING))
+ goto failed;
+
+ if (!_dbus_string_align_length (&message->header, 4))
+ goto failed;
+
+ message->header_fields[field].offset =
+ _dbus_string_get_length (&message->header);
+
+ if (!_dbus_marshal_string (&message->header, message->byte_order,
+ value))
+ goto failed;
+
+ if (!append_header_padding (message))
+ goto failed;
+
+ return TRUE;
+
+ failed:
+ message->header_fields[field].offset = -1;
+ _dbus_string_set_length (&message->header, orig_len);
+
+ /* this must succeed because it was allocated on function entry and
+ * DBusString doesn't ever realloc smaller
+ */
+ if (!append_header_padding (message))
+ _dbus_assert_not_reached ("failed to reappend header padding");
+
+ return FALSE;
+}
+
+static void
+delete_int_field (DBusMessage *message,
+ int field)
+{
+ int offset = message->header_fields[field].offset;
+
+ _dbus_assert (!message->locked);
+ _dbus_assert (field_is_named[field]);
+
+ if (offset < 0)
+ return;
+
+ clear_header_padding (message);
+
+ /* The field typecode and name take up 8 bytes */
+ _dbus_string_delete (&message->header,
+ offset - 8,
+ 12);
+
+ message->header_fields[field].offset = -1;
+
+ adjust_field_offsets (message,
+ offset - 8,
+ - 12);
+
+ append_header_padding (message);
+}
+
+static void
+delete_string_field (DBusMessage *message,
+ int field)
+{
+ int offset = message->header_fields[field].offset;
+ int len;
+ int delete_len;
+
+ _dbus_assert (!message->locked);
+ _dbus_assert (field_is_named[field]);
+
+ if (offset < 0)
+ return;
+
+ clear_header_padding (message);
+
+ get_string_field (message, field, &len);
+
+ /* The field typecode and name take up 8 bytes, and the nul
+ * termination is 1 bytes, string length integer is 4 bytes
+ */
+ delete_len = 8 + 4 + 1 + len;
+
+ _dbus_string_delete (&message->header,
+ offset - 8,
+ delete_len);
+
+ message->header_fields[field].offset = -1;
+
+ adjust_field_offsets (message,
+ offset - 8,
+ - delete_len);
+
+ append_header_padding (message);
+}
+
+static dbus_bool_t
+set_int_field (DBusMessage *message,
+ int field,
+ int value)
+{
+ int offset = message->header_fields[field].offset;
+
+ _dbus_assert (!message->locked);
+
+ if (offset < 0)
+ {
+ /* need to append the field */
+
+ switch (field)
+ {
+ case FIELD_REPLY_SERIAL:
+ return append_int_field (message, field,
+ DBUS_HEADER_FIELD_REPLY,
+ value);
+ default:
+ _dbus_assert_not_reached ("appending an int field we don't support appending");
+ return FALSE;
+ }
+ }
+ else
+ {
+ _dbus_marshal_set_int32 (&message->header,
+ message->byte_order,
+ offset, value);
+
+ return TRUE;
+ }
+}
+
+static dbus_bool_t
+set_uint_field (DBusMessage *message,
+ int field,
+ dbus_uint32_t value)
+{
+ int offset = message->header_fields[field].offset;
+
+ _dbus_assert (!message->locked);
+
+ if (offset < 0)
+ {
+ /* need to append the field */
+
+ switch (field)
+ {
+ default:
+ _dbus_assert_not_reached ("appending a uint field we don't support appending");
+ return FALSE;
+ }
+ }
+ else
+ {
+ _dbus_marshal_set_uint32 (&message->header,
+ message->byte_order,
+ offset, value);
+
+ return TRUE;
+ }
+}
+
+static dbus_bool_t
+set_string_field (DBusMessage *message,
+ int field,
+ const char *value)
+{
+ int offset = message->header_fields[field].offset;
+
+ _dbus_assert (!message->locked);
+ _dbus_assert (value != NULL);
+
+ if (offset < 0)
+ {
+ /* need to append the field */
+
+ switch (field)
+ {
+ case FIELD_SENDER:
+ return append_string_field (message, field,
+ DBUS_HEADER_FIELD_SENDER,
+ value);
+ default:
+ _dbus_assert_not_reached ("appending a string field we don't support appending");
+ return FALSE;
+ }
+ }
+ else
+ {
+ DBusString v;
+ int old_len;
+ int new_len;
+ int len;
+
+ clear_header_padding (message);
+
+ old_len = _dbus_string_get_length (&message->header);
+
+ len = strlen (value);
+
+ _dbus_string_init_const_len (&v, value,
+ len + 1); /* include nul */
+ if (!_dbus_marshal_set_string (&message->header,
+ message->byte_order,
+ offset, &v,
+ len))
+ goto failed;
+
+ new_len = _dbus_string_get_length (&message->header);
+
+ adjust_field_offsets (message,
+ offset,
+ new_len - old_len);
+
+ if (!append_header_padding (message))
+ goto failed;
+
+ return TRUE;
+
+ failed:
+ /* this must succeed because it was allocated on function entry and
+ * DBusString doesn't ever realloc smaller
+ */
+ if (!append_header_padding (message))
+ _dbus_assert_not_reached ("failed to reappend header padding");
+
+ return FALSE;
+ }
+}
+
+/**
+ * Sets the serial number of a message.
+ * This can only be done once on a message.
+ *
+ * @param message the message
+ * @param serial the serial
+ */
+void
+_dbus_message_set_serial (DBusMessage *message,
+ dbus_int32_t serial)
+{
+ _dbus_assert (!message->locked);
+ _dbus_assert (dbus_message_get_serial (message) < 0);
+
+ set_int_field (message, FIELD_CLIENT_SERIAL,
+ serial);
+ message->client_serial = serial;
+}
+
+/**
+ * Sets the reply serial of a message (the client serial
+ * of the message this is a reply to).
+ *
+ * @param message the message
+ * @param reply_serial the client serial
+ * @returns #FALSE if not enough memory
+ */
+dbus_bool_t
+dbus_message_set_reply_serial (DBusMessage *message,
+ dbus_int32_t reply_serial)
+{
+ _dbus_assert (!message->locked);
+
+ if (set_int_field (message, FIELD_REPLY_SERIAL,
+ reply_serial))
+ {
+ message->reply_serial = reply_serial;
+ return TRUE;
+ }
+ else
+ return FALSE;
+}
+
+/**
+ * Returns the serial of a message or -1 if none has been specified.
+ * The message's serial number is provided by the application sending
+ * the message and is used to identify replies to this message.
+ *
+ * @param message the message
+ * @returns the client serial
+ */
+dbus_int32_t
+dbus_message_get_serial (DBusMessage *message)
+{
+ return message->client_serial;
+}
+
+/**
+ * Returns the serial that the message is
+ * a reply to or -1 if none.
+ *
+ * @param message the message
+ * @returns the reply serial
+ */
+dbus_int32_t
+dbus_message_get_reply_serial (DBusMessage *message)
+{
+ return message->reply_serial;
+}
+
+/**
+ * Adds a counter to be incremented immediately with the
+ * size of this message, and decremented by the size
+ * of this message when this message if finalized.
+ *
+ * @param message the message
+ * @param counter the counter
+ */
+void
+_dbus_message_add_size_counter (DBusMessage *message,
+ DBusCounter *counter)
+{
+ _dbus_assert (message->size_counter == NULL); /* If this fails we may need to keep a list of
+ * counters instead of just one
+ */
+
+ message->size_counter = counter;
+ _dbus_counter_ref (message->size_counter);
+
+ /* When we can change message size, we may want to
+ * update this each time we do so, or we may want to
+ * just KISS like this.
+ */
+ message->size_counter_delta =
+ _dbus_string_get_length (&message->header) +
+ _dbus_string_get_length (&message->body);
+
+#if 0
+ _dbus_verbose ("message has size %ld\n",
+ message->size_counter_delta);
+#endif
+
+ _dbus_counter_adjust (message->size_counter, message->size_counter_delta);
+}
+
+static dbus_bool_t
+dbus_message_create_header (DBusMessage *message,
+ const char *service,
+ const char *name)
+{
+ unsigned int flags;
+
+ if (!_dbus_string_append_byte (&message->header, message->byte_order))
+ return FALSE;
+
+ flags = 0;
+ if (!_dbus_string_append_byte (&message->header, flags))
+ return FALSE;
+
+ if (!_dbus_string_append_byte (&message->header, DBUS_MAJOR_PROTOCOL_VERSION))
+ return FALSE;
+
+ if (!_dbus_string_append_byte (&message->header, 0))
+ return FALSE;
+
+ message->header_fields[FIELD_HEADER_LENGTH].offset = 4;
+ if (!_dbus_marshal_uint32 (&message->header, message->byte_order, 0))
+ return FALSE;
+
+ message->header_fields[FIELD_BODY_LENGTH].offset = 8;
+ if (!_dbus_marshal_uint32 (&message->header, message->byte_order, 0))
+ return FALSE;
+
+ message->header_fields[FIELD_CLIENT_SERIAL].offset = 12;
+ if (!_dbus_marshal_int32 (&message->header, message->byte_order, -1))
+ return FALSE;
+
+ /* Marshal message service */
+ if (service != NULL)
+ {
+ if (!append_string_field (message,
+ FIELD_SERVICE,
+ DBUS_HEADER_FIELD_SERVICE,
+ service))
+ return FALSE;
+ }
+
+ _dbus_assert (name != NULL);
+ if (!append_string_field (message,
+ FIELD_NAME,
+ DBUS_HEADER_FIELD_NAME,
+ name))
+ return FALSE;
+
+ return TRUE;
+}
+
+/**
+ * Locks a message. Allows checking that applications don't keep a
+ * reference to a message in the outgoing queue and change it
+ * underneath us. Messages are locked when they enter the outgoing
+ * queue (dbus_connection_send_message()), and the library complains
+ * if the message is modified while locked.
+ *
+ * @param message the message to lock.
+ */
+void
+_dbus_message_lock (DBusMessage *message)
+{
+ if (!message->locked)
+ {
+ /* Fill in our lengths */
+ set_uint_field (message,
+ FIELD_HEADER_LENGTH,
+ _dbus_string_get_length (&message->header));
+
+ set_uint_field (message,
+ FIELD_BODY_LENGTH,
+ _dbus_string_get_length (&message->body));
+
+ message->locked = TRUE;
+ }
+}
+
/** @} */
/**
* @defgroup DBusMessage DBusMessage
* @ingroup DBus
- * @brief DBusMessage object
+ * @brief Message to be sent or received over a DBusConnection.
*
- * Types and functions related to the DBusMessage object.
+ * A DBusMessage is the most basic unit of communication over a
+ * DBusConnection. A DBusConnection represents a stream of messages
+ * received from a remote application, and a stream of messages
+ * sent to a remote application.
*
* @{
*/
* sent to another application.
*/
+static DBusMessage*
+dbus_message_new_empty_header (void)
+{
+ DBusMessage *message;
+ int i;
+
+ message = dbus_new0 (DBusMessage, 1);
+ if (message == NULL)
+ return NULL;
+
+ message->refcount = 1;
+ message->byte_order = DBUS_COMPILER_BYTE_ORDER;
+ message->client_serial = -1;
+ message->reply_serial = -1;
+
+ i = 0;
+ while (i < FIELD_LAST)
+ {
+ message->header_fields[i].offset = -1;
+ ++i;
+ }
+
+ if (!_dbus_string_init (&message->header))
+ {
+ dbus_free (message);
+ return NULL;
+ }
+
+ if (!_dbus_string_init (&message->body))
+ {
+ _dbus_string_free (&message->header);
+ dbus_free (message);
+ return NULL;
+ }
+
+ return message;
+}
+
+
/**
- * Constructs a new message.
- * @return a new DBusMessage, free with dbus_message_unref()
+ * Constructs a new message. Returns #NULL if memory can't be
+ * allocated for the message. The service may be #NULL in which case
+ * no service is set; this is appropriate when using D-BUS in a
+ * peer-to-peer context (no message bus).
+ *
+ * @todo reverse the arguments, first 'name' then 'service'
+ * as 'name' is more fundamental
+ *
+ * @param service service that the message should be sent to or #NULL
+ * @param name name of the message
+ * @returns a new DBusMessage, free with dbus_message_unref()
* @see dbus_message_unref()
*/
DBusMessage*
-dbus_message_new (void)
+dbus_message_new (const char *service,
+ const char *name)
{
+ DBusMessage *message;
+
+ message = dbus_message_new_empty_header ();
+ if (message == NULL)
+ return NULL;
+
+ if (!dbus_message_create_header (message, service, name))
+ {
+ dbus_message_unref (message);
+ return NULL;
+ }
- return NULL;
+ return message;
}
+/**
+ * Constructs a message that is a reply to some other
+ * message. Returns #NULL if memory can't be allocated
+ * for the message.
+ *
+ * @param original_message the message which the created
+ * message is a reply to.
+ * @returns a new DBusMessage, free with dbus_message_unref()
+ * @see dbus_message_new(), dbus_message_unref()
+ */
+DBusMessage*
+dbus_message_new_reply (DBusMessage *original_message)
+{
+ DBusMessage *message;
+ const char *sender, *name;
+
+ sender = get_string_field (original_message,
+ FIELD_SENDER, NULL);
+ name = get_string_field (original_message,
+ FIELD_NAME, NULL);
+
+ /* sender is allowed to be null here in peer-to-peer case */
+
+ message = dbus_message_new (sender, name);
+
+ if (message == NULL)
+ return NULL;
+
+ if (!dbus_message_set_reply_serial (message,
+ dbus_message_get_serial (original_message)))
+ {
+ dbus_message_unref (message);
+ return NULL;
+ }
+
+ return message;
+}
/**
- * Increments the reference count of a DBusMessage.
+ * Creates a new message that is an error reply to a certain message.
*
- * @param message The message
- * @see dbus_message_unref
+ * @param original_message the original message
+ * @param error_name the error name
+ * @param error_message the error message string
+ * @returns a new error message
*/
-void
-dbus_message_ref (DBusMessage *message)
+DBusMessage*
+dbus_message_new_error_reply (DBusMessage *original_message,
+ const char *error_name,
+ const char *error_message)
{
+ DBusMessage *message;
+ const char *sender;
+
+ sender = get_string_field (original_message,
+ FIELD_SENDER, NULL);
+
+ _dbus_assert (sender != NULL);
+
+ message = dbus_message_new (sender, error_name);
+
+ if (message == NULL)
+ return NULL;
+
+ if (!dbus_message_set_reply_serial (message,
+ dbus_message_get_serial (original_message)))
+ {
+ dbus_message_unref (message);
+ return NULL;
+ }
+
+ if (!dbus_message_append_string (message, error_message))
+ {
+ dbus_message_unref (message);
+ return NULL;
+ }
+
+ dbus_message_set_is_error (message, TRUE);
+ return message;
}
/**
- * Decrements the reference count of a DBusMessage.
+ * Creates a new message that is an exact replica of the message
+ * specified, except that its refcount is set to 1.
*
- * @param message The message
- * @see dbus_message_ref
+ * @param message the message.
+ * @returns the new message.
*/
-void
-dbus_message_unref (DBusMessage *message)
+DBusMessage *
+dbus_message_copy (const DBusMessage *message)
{
+ DBusMessage *retval;
+ int i;
+
+ retval = dbus_new0 (DBusMessage, 1);
+ if (retval == NULL)
+ return NULL;
+
+ retval->refcount = 1;
+ retval->byte_order = message->byte_order;
+ retval->client_serial = message->client_serial;
+ retval->reply_serial = message->reply_serial;
+ retval->header_padding = message->header_padding;
+ retval->locked = FALSE;
+
+ if (!_dbus_string_init (&retval->header))
+ {
+ dbus_free (retval);
+ return NULL;
+ }
+
+ if (!_dbus_string_init (&retval->body))
+ {
+ _dbus_string_free (&retval->header);
+ dbus_free (retval);
+ return NULL;
+ }
+
+ if (!_dbus_string_copy (&message->header, 0,
+ &retval->header, 0))
+ {
+ _dbus_string_free (&retval->header);
+ _dbus_string_free (&retval->body);
+ dbus_free (retval);
+
+ return NULL;
+ }
+
+ if (!_dbus_string_copy (&message->body, 0,
+ &retval->body, 0))
+ {
+ _dbus_string_free (&retval->header);
+ _dbus_string_free (&retval->body);
+ dbus_free (retval);
+ return NULL;
+ }
+ for (i = 0; i < FIELD_LAST; i++)
+ {
+ retval->header_fields[i].offset = message->header_fields[i].offset;
+ }
+
+ return retval;
}
-/** @} */
+
+/**
+ * Increments the reference count of a DBusMessage.
+ *
+ * @param message The message
+ * @see dbus_message_unref
+ */
+void
+dbus_message_ref (DBusMessage *message)
+{
+ dbus_atomic_t refcount;
+
+ refcount = _dbus_atomic_inc (&message->refcount);
+ _dbus_assert (refcount > 1);
+}
+
+/**
+ * Decrements the reference count of a DBusMessage.
+ *
+ * @param message The message
+ * @see dbus_message_ref
+ */
+void
+dbus_message_unref (DBusMessage *message)
+{
+ dbus_atomic_t refcount;
+
+ refcount = _dbus_atomic_dec (&message->refcount);
+
+ _dbus_assert (refcount >= 0);
+
+ if (refcount == 0)
+ {
+ if (message->size_counter != NULL)
+ {
+ _dbus_counter_adjust (message->size_counter,
+ - message->size_counter_delta);
+ _dbus_counter_unref (message->size_counter);
+ }
+
+ _dbus_string_free (&message->header);
+ _dbus_string_free (&message->body);
+
+ dbus_free (message);
+ }
+}
+
+/**
+ * Gets the name of a message.
+ *
+ * @param message the message
+ * @returns the message name (should not be freed)
+ */
+const char*
+dbus_message_get_name (DBusMessage *message)
+{
+ return get_string_field (message, FIELD_NAME, NULL);
+}
+
+/**
+ * Gets the destination service of a message.
+ *
+ * @todo I think if we have set_sender/get_sender,
+ * this function might be better named set_destination/
+ * get_destination for clarity, as the sender
+ * is also a service name.
+ *
+ * @param message the message
+ * @returns the message destination service (should not be freed)
+ */
+const char*
+dbus_message_get_service (DBusMessage *message)
+{
+ return get_string_field (message, FIELD_SERVICE, NULL);
+}
+
+/**
+ * Appends fields to a message given a variable argument
+ * list. The variable argument list should contain the type
+ * of the argument followed by the value to add. Array values
+ * are specified by a pointer to the array followed by an int
+ * giving the length of the array. The list is terminated
+ * with 0.
+ *
+ * @param message the message
+ * @param first_arg_type type of the first argument
+ * @param ... value of first argument, list of additional type-value pairs
+ * @returns #TRUE on success
+ */
+dbus_bool_t
+dbus_message_append_args (DBusMessage *message,
+ int first_arg_type,
+ ...)
+{
+ dbus_bool_t retval;
+ va_list var_args;
+
+ va_start (var_args, first_arg_type);
+ retval = dbus_message_append_args_valist (message,
+ first_arg_type,
+ var_args);
+ va_end (var_args);
+
+ return retval;
+}
+
+/**
+ * This function takes a va_list for use by language bindings
+ *
+ * @see dbus_message_append_args.
+ * @param message the message
+ * @param first_arg_type type of first argument
+ * @param var_args value of first argument, then list of type/value pairs
+ * @returns #TRUE on success
+ */
+dbus_bool_t
+dbus_message_append_args_valist (DBusMessage *message,
+ int first_arg_type,
+ va_list var_args)
+{
+ int type, old_len;
+
+ old_len = _dbus_string_get_length (&message->body);
+
+ type = first_arg_type;
+
+ while (type != 0)
+ {
+ switch (type)
+ {
+ case DBUS_TYPE_NIL:
+ if (!dbus_message_append_nil (message))
+ goto enomem;
+ case DBUS_TYPE_BOOLEAN:
+ if (!dbus_message_append_boolean (message, va_arg (var_args, dbus_bool_t)))
+ goto enomem;
+ break;
+ case DBUS_TYPE_INT32:
+ if (!dbus_message_append_int32 (message, va_arg (var_args, dbus_int32_t)))
+ goto enomem;
+ break;
+ case DBUS_TYPE_UINT32:
+ if (!dbus_message_append_uint32 (message, va_arg (var_args, dbus_uint32_t)))
+ goto enomem;
+ break;
+ case DBUS_TYPE_DOUBLE:
+ if (!dbus_message_append_double (message, va_arg (var_args, double)))
+ goto enomem;
+ break;
+ case DBUS_TYPE_STRING:
+ if (!dbus_message_append_string (message, va_arg (var_args, const char *)))
+ goto enomem;
+ break;
+ case DBUS_TYPE_BOOLEAN_ARRAY:
+ {
+ int len;
+ unsigned char *data;
+
+ data = va_arg (var_args, unsigned char *);
+ len = va_arg (var_args, int);
+
+ if (!dbus_message_append_boolean_array (message, data, len))
+ goto enomem;
+ }
+ break;
+ case DBUS_TYPE_INT32_ARRAY:
+ {
+ int len;
+ dbus_int32_t *data;
+
+ data = va_arg (var_args, dbus_int32_t *);
+ len = va_arg (var_args, int);
+
+ if (!dbus_message_append_int32_array (message, data, len))
+ goto enomem;
+ }
+ break;
+ case DBUS_TYPE_UINT32_ARRAY:
+ {
+ int len;
+ dbus_uint32_t *data;
+
+ data = va_arg (var_args, dbus_uint32_t *);
+ len = va_arg (var_args, int);
+
+ if (!dbus_message_append_uint32_array (message, data, len))
+ goto enomem;
+ }
+ break;
+ case DBUS_TYPE_DOUBLE_ARRAY:
+ {
+ int len;
+ double *data;
+
+ data = va_arg (var_args, double *);
+ len = va_arg (var_args, int);
+
+ if (!dbus_message_append_double_array (message, data, len))
+ goto enomem;
+ }
+ break;
+ case DBUS_TYPE_BYTE_ARRAY:
+ {
+ int len;
+ unsigned char *data;
+
+ data = va_arg (var_args, unsigned char *);
+ len = va_arg (var_args, int);
+
+ if (!dbus_message_append_byte_array (message, data, len))
+ goto enomem;
+ }
+ break;
+ case DBUS_TYPE_STRING_ARRAY:
+ {
+ int len;
+ const char **data;
+
+ data = va_arg (var_args, const char **);
+ len = va_arg (var_args, int);
+
+ if (!dbus_message_append_string_array (message, data, len))
+ goto enomem;
+ }
+ break;
+ case DBUS_TYPE_DICT:
+ {
+ DBusDict *dict;
+
+ dict = va_arg (var_args, DBusDict *);
+
+ if (!dbus_message_append_dict (message, dict))
+ goto enomem;
+ break;
+ }
+ default:
+ _dbus_warn ("Unknown field type %d\n", type);
+ }
+
+ type = va_arg (var_args, int);
+ }
+
+ return TRUE;
+
+ enomem:
+ return FALSE;
+}
+
+/**
+ * Appends a nil value to the message
+ *
+ * @param message the message
+ * @returns #TRUE on success
+ */
+dbus_bool_t
+dbus_message_append_nil (DBusMessage *message)
+{
+ _dbus_assert (!message->locked);
+
+ if (!_dbus_string_append_byte (&message->body, DBUS_TYPE_NIL))
+ return FALSE;
+ else
+ return TRUE;
+}
+
+/**
+ * Appends a boolean value to the message
+ *
+ * @param message the message
+ * @param value the boolean value
+ * @returns #TRUE on success
+ */
+dbus_bool_t
+dbus_message_append_boolean (DBusMessage *message,
+ dbus_bool_t value)
+{
+ _dbus_assert (!message->locked);
+
+ if (!_dbus_string_append_byte (&message->body, DBUS_TYPE_BOOLEAN))
+ return FALSE;
+
+ if (!_dbus_string_append_byte (&message->body, (value != FALSE)))
+ {
+ _dbus_string_shorten (&message->body, 1);
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+/**
+ * Appends a 32 bit signed integer to the message.
+ *
+ * @param message the message
+ * @param value the integer value
+ * @returns #TRUE on success
+ */
+dbus_bool_t
+dbus_message_append_int32 (DBusMessage *message,
+ dbus_int32_t value)
+{
+ _dbus_assert (!message->locked);
+
+ if (!_dbus_string_append_byte (&message->body, DBUS_TYPE_INT32))
+ return FALSE;
+
+ if (!_dbus_marshal_int32 (&message->body, message->byte_order, value))
+ {
+ _dbus_string_shorten (&message->body, 1);
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+/**
+ * Appends a 32 bit unsigned integer to the message.
+ *
+ * @param message the message
+ * @param value the integer value
+ * @returns #TRUE on success
+ */
+dbus_bool_t
+dbus_message_append_uint32 (DBusMessage *message,
+ dbus_uint32_t value)
+{
+ _dbus_assert (!message->locked);
+
+ if (!_dbus_string_append_byte (&message->body, DBUS_TYPE_UINT32))
+ return FALSE;
+
+ if (!_dbus_marshal_uint32 (&message->body, message->byte_order, value))
+ {
+ _dbus_string_shorten (&message->body, 1);
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+/**
+ * Appends a double value to the message.
+ *
+ * @param message the message
+ * @param value the double value
+ * @returns #TRUE on success
+ */
+dbus_bool_t
+dbus_message_append_double (DBusMessage *message,
+ double value)
+{
+ _dbus_assert (!message->locked);
+
+ if (!_dbus_string_append_byte (&message->body, DBUS_TYPE_DOUBLE))
+ return FALSE;
+
+ if (!_dbus_marshal_double (&message->body, message->byte_order, value))
+ {
+ _dbus_string_shorten (&message->body, 1);
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+/**
+ * Appends a UTF-8 string to the message.
+ *
+ * @param message the message
+ * @param value the string
+ * @returns #TRUE on success
+ */
+dbus_bool_t
+dbus_message_append_string (DBusMessage *message,
+ const char *value)
+{
+ _dbus_assert (!message->locked);
+
+ if (!_dbus_string_append_byte (&message->body, DBUS_TYPE_STRING))
+ return FALSE;
+
+ if (!_dbus_marshal_string (&message->body, message->byte_order, value))
+ {
+ _dbus_string_shorten (&message->body, 1);
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+/**
+ * Appends a boolean array to the message.
+ *
+ * @param message the message
+ * @param value the array
+ * @param len the length of the array
+ * @returns #TRUE on success
+ */
+dbus_bool_t
+dbus_message_append_boolean_array (DBusMessage *message,
+ unsigned const char *value,
+ int len)
+{
+ _dbus_assert (!message->locked);
+
+ if (!_dbus_string_append_byte (&message->body, DBUS_TYPE_BOOLEAN_ARRAY))
+ return FALSE;
+
+ if (!_dbus_marshal_byte_array (&message->body, message->byte_order, value, len))
+ {
+ _dbus_string_shorten (&message->body, 1);
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+/**
+ * Appends a 32 bit signed integer array to the message.
+ *
+ * @param message the message
+ * @param value the array
+ * @param len the length of the array
+ * @returns #TRUE on success
+ */
+dbus_bool_t
+dbus_message_append_int32_array (DBusMessage *message,
+ const dbus_int32_t *value,
+ int len)
+{
+ _dbus_assert (!message->locked);
+
+ if (!_dbus_string_append_byte (&message->body, DBUS_TYPE_INT32_ARRAY))
+ return FALSE;
+
+ if (!_dbus_marshal_int32_array (&message->body, message->byte_order,
+ value, len))
+ {
+ _dbus_string_shorten (&message->body, 1);
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+/**
+ * Appends a 32 bit unsigned integer array to the message.
+ *
+ * @param message the message
+ * @param value the array
+ * @param len the length of the array
+ * @returns #TRUE on success
+ */
+dbus_bool_t
+dbus_message_append_uint32_array (DBusMessage *message,
+ const dbus_uint32_t *value,
+ int len)
+{
+ _dbus_assert (!message->locked);
+
+ if (!_dbus_string_append_byte (&message->body, DBUS_TYPE_UINT32_ARRAY))
+ return FALSE;
+
+ if (!_dbus_marshal_uint32_array (&message->body, message->byte_order,
+ value, len))
+ {
+ _dbus_string_shorten (&message->body, 1);
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+/**
+ * Appends a double array to the message.
+ *
+ * @param message the message
+ * @param value the array
+ * @param len the length of the array
+ * @returns #TRUE on success
+ */
+dbus_bool_t
+dbus_message_append_double_array (DBusMessage *message,
+ const double *value,
+ int len)
+{
+ _dbus_assert (!message->locked);
+
+ if (!_dbus_string_append_byte (&message->body, DBUS_TYPE_DOUBLE_ARRAY))
+ return FALSE;
+
+ if (!_dbus_marshal_double_array (&message->body, message->byte_order,
+ value, len))
+ {
+ _dbus_string_shorten (&message->body, 1);
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+/**
+ * Appends a byte array to the message.
+ *
+ * @param message the message
+ * @param value the array
+ * @param len the length of the array
+ * @returns #TRUE on success
+ */
+dbus_bool_t
+dbus_message_append_byte_array (DBusMessage *message,
+ unsigned const char *value,
+ int len)
+{
+ _dbus_assert (!message->locked);
+
+ if (!_dbus_string_append_byte (&message->body, DBUS_TYPE_BYTE_ARRAY))
+ return FALSE;
+
+ if (!_dbus_marshal_byte_array (&message->body, message->byte_order, value, len))
+ {
+ _dbus_string_shorten (&message->body, 1);
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+/**
+ * Appends a string array to the message.
+ *
+ * @param message the message
+ * @param value the array
+ * @param len the length of the array
+ * @returns #TRUE on success
+ */
+dbus_bool_t
+dbus_message_append_string_array (DBusMessage *message,
+ const char **value,
+ int len)
+{
+ _dbus_assert (!message->locked);
+
+ if (!_dbus_string_append_byte (&message->body, DBUS_TYPE_STRING_ARRAY))
+ return FALSE;
+
+ if (!_dbus_marshal_string_array (&message->body, message->byte_order,
+ (const char **)value, len))
+ {
+ _dbus_string_shorten (&message->body, 1);
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+/**
+ * Appends a dict to the message.
+ *
+ * @param message the message
+ * @param dict the dict
+ * @returns #TRUE on success
+ */
+dbus_bool_t
+dbus_message_append_dict (DBusMessage *message,
+ DBusDict *dict)
+{
+ _dbus_assert (!message->locked);
+
+ if (!_dbus_string_append_byte (&message->body, DBUS_TYPE_DICT))
+ return FALSE;
+
+ if (!_dbus_marshal_dict (&message->body, message->byte_order, dict))
+ {
+ _dbus_string_shorten (&message->body, 1);
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+/**
+ * Gets arguments from a message given a variable argument list.
+ * The variable argument list should contain the type of the
+ * argumen followed by a pointer to where the value should be
+ * stored. The list is terminated with 0.
+ *
+ * @param message the message
+ * @param error error to be filled in on failure
+ * @param first_arg_type the first argument type
+ * @param ... location for first argument value, then list of type-location pairs
+ * @returns #FALSE if the error was set
+ */
+dbus_bool_t
+dbus_message_get_args (DBusMessage *message,
+ DBusError *error,
+ int first_arg_type,
+ ...)
+{
+ dbus_bool_t retval;
+ va_list var_args;
+
+ _DBUS_ASSERT_ERROR_IS_CLEAR (error);
+
+ va_start (var_args, first_arg_type);
+ retval = dbus_message_get_args_valist (message, error, first_arg_type, var_args);
+ va_end (var_args);
+
+ return retval;
+}
+
+/**
+ * This function takes a va_list for use by language bindings
+ *
+ * @todo this function (or some lower-level non-convenience function)
+ * needs better error handling; should allow the application to
+ * distinguish between out of memory, and bad data from the remote
+ * app. It also needs to not leak a bunch of args when it gets
+ * to the arg that's bad, as that would be a security hole
+ * (allow one app to force another to leak memory)
+ *
+ * @todo We need to free the argument data when an error occurs.
+ *
+ * @see dbus_message_get_args
+ * @param message the message
+ * @param error error to be filled in
+ * @param first_arg_type type of the first argument
+ * @param var_args return location for first argument, followed by list of type/location pairs
+ * @returns #FALSE if error was set
+ */
+dbus_bool_t
+dbus_message_get_args_valist (DBusMessage *message,
+ DBusError *error,
+ int first_arg_type,
+ va_list var_args)
+{
+ int spec_type, msg_type, i;
+ DBusMessageIter *iter;
+ dbus_bool_t retval;
+
+ _DBUS_ASSERT_ERROR_IS_CLEAR (error);
+
+ iter = dbus_message_get_args_iter (message);
+
+ if (iter == NULL)
+ {
+ dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
+ return FALSE;
+ }
+
+ retval = FALSE;
+
+ spec_type = first_arg_type;
+ i = 0;
+
+ while (spec_type != 0)
+ {
+ msg_type = dbus_message_iter_get_arg_type (iter);
+
+ if (msg_type != spec_type)
+ {
+ dbus_set_error (error, DBUS_ERROR_INVALID_ARGS,
+ "Argument %d is specified to be of type \"%s\", but "
+ "is actually of type \"%s\"\n", i,
+ _dbus_type_to_string (spec_type),
+ _dbus_type_to_string (msg_type));
+
+ goto out;
+ }
+
+ switch (spec_type)
+ {
+ case DBUS_TYPE_NIL:
+ break;
+ case DBUS_TYPE_BOOLEAN:
+ {
+ dbus_bool_t *ptr;
+
+ ptr = va_arg (var_args, dbus_bool_t *);
+
+ *ptr = dbus_message_iter_get_boolean (iter);
+ break;
+ }
+ case DBUS_TYPE_INT32:
+ {
+ dbus_int32_t *ptr;
+
+ ptr = va_arg (var_args, dbus_int32_t *);
+
+ *ptr = dbus_message_iter_get_int32 (iter);
+ break;
+ }
+ case DBUS_TYPE_UINT32:
+ {
+ dbus_uint32_t *ptr;
+
+ ptr = va_arg (var_args, dbus_uint32_t *);
+
+ *ptr = dbus_message_iter_get_uint32 (iter);
+ break;
+ }
+
+ case DBUS_TYPE_DOUBLE:
+ {
+ double *ptr;
+
+ ptr = va_arg (var_args, double *);
+
+ *ptr = dbus_message_iter_get_double (iter);
+ break;
+ }
+
+ case DBUS_TYPE_STRING:
+ {
+ char **ptr;
+
+ ptr = va_arg (var_args, char **);
+
+ *ptr = dbus_message_iter_get_string (iter);
+
+ if (!*ptr)
+ {
+ dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
+ goto out;
+ }
+
+ break;
+ }
+
+ case DBUS_TYPE_BOOLEAN_ARRAY:
+ {
+ unsigned char **ptr;
+ int *len;
+
+ ptr = va_arg (var_args, unsigned char **);
+ len = va_arg (var_args, int *);
+
+ if (!dbus_message_iter_get_boolean_array (iter, ptr, len))
+ {
+ dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
+ goto out;
+ }
+ break;
+ }
+
+ case DBUS_TYPE_INT32_ARRAY:
+ {
+ dbus_int32_t **ptr;
+ int *len;
+
+ ptr = va_arg (var_args, dbus_int32_t **);
+ len = va_arg (var_args, int *);
+
+ if (!dbus_message_iter_get_int32_array (iter, ptr, len))
+ {
+ dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
+ goto out;
+ }
+
+ break;
+ }
+
+ case DBUS_TYPE_UINT32_ARRAY:
+ {
+ dbus_uint32_t **ptr;
+ int *len;
+
+ ptr = va_arg (var_args, dbus_uint32_t **);
+ len = va_arg (var_args, int *);
+
+ if (!dbus_message_iter_get_uint32_array (iter, ptr, len))
+ {
+ dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
+ goto out;
+ }
+
+ break;
+ }
+
+ case DBUS_TYPE_DOUBLE_ARRAY:
+ {
+ double **ptr;
+ int *len;
+
+ ptr = va_arg (var_args, double **);
+ len = va_arg (var_args, int *);
+
+ if (!dbus_message_iter_get_double_array (iter, ptr, len))
+ {
+ dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
+ goto out;
+ }
+ break;
+ }
+
+ case DBUS_TYPE_BYTE_ARRAY:
+ {
+ unsigned char **ptr;
+ int *len;
+
+ ptr = va_arg (var_args, unsigned char **);
+ len = va_arg (var_args, int *);
+
+ if (!dbus_message_iter_get_byte_array (iter, ptr, len))
+ {
+ dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
+ goto out;
+ }
+ break;
+ }
+ case DBUS_TYPE_STRING_ARRAY:
+ {
+ char ***ptr;
+ int *len;
+
+ ptr = va_arg (var_args, char ***);
+ len = va_arg (var_args, int *);
+
+ if (!dbus_message_iter_get_string_array (iter, ptr, len))
+ {
+ dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
+ goto out;
+ }
+ break;
+ }
+ case DBUS_TYPE_DICT:
+ {
+ DBusDict **dict;
+
+ dict = va_arg (var_args, DBusDict **);
+
+ if (!dbus_message_iter_get_dict (iter, dict))
+ {
+ dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
+ goto out;
+ }
+ break;
+ }
+ default:
+ _dbus_warn ("Unknown field type %d\n", spec_type);
+ }
+
+ spec_type = va_arg (var_args, int);
+ if (spec_type != 0 && !dbus_message_iter_next (iter))
+ {
+ dbus_set_error (error, DBUS_ERROR_INVALID_ARGS,
+ "Message has only %d arguments, but more were expected", i);
+ goto out;
+ }
+
+ i++;
+ }
+
+ retval = TRUE;
+
+ out:
+ dbus_message_iter_unref (iter);
+ return retval;
+}
+
+/**
+ * Returns a DBusMessageIter representing the arguments of the
+ * message passed in.
+ *
+ * @todo IMO the message iter should follow the GtkTextIter pattern,
+ * a static object with a "stamp" value used to detect invalid
+ * iter uses (uninitialized or after changing the message).
+ * ref/unref is kind of annoying to deal with, and slower too.
+ * This implies not ref'ing the message from the iter.
+ *
+ * @todo I'd also name this dbus_message_iter_new() or
+ * for the static object dbus_message_iter_init() rather
+ * than making it a method on the message
+ *
+ * @param message the message
+ * @returns a new iter.
+ */
+DBusMessageIter *
+dbus_message_get_args_iter (DBusMessage *message)
+{
+ DBusMessageIter *iter;
+
+ iter = dbus_new (DBusMessageIter, 1);
+
+ if (iter != NULL)
+ {
+ dbus_message_ref (message);
+
+ iter->refcount = 1;
+ iter->message = message;
+ iter->pos = 0;
+ }
+
+ return iter;
+}
+
+/**
+ * Increments the reference count of a DBusMessageIter.
+ *
+ * @param iter the message iter
+ * @see dbus_message_iter_unref
+ */
+void
+dbus_message_iter_ref (DBusMessageIter *iter)
+{
+ _dbus_assert (iter->refcount > 0);
+
+ iter->refcount += 1;
+}
+
+/**
+ * Decrements the reference count of a DBusMessageIter.
+ *
+ * @param iter The message iter
+ * @see dbus_message_iter_ref
+ */
+void
+dbus_message_iter_unref (DBusMessageIter *iter)
+{
+ _dbus_assert (iter->refcount > 0);
+
+ iter->refcount -= 1;
+
+ if (iter->refcount == 0)
+ {
+ dbus_message_unref (iter->message);
+
+ dbus_free (iter);
+ }
+}
+
+/**
+ * Checks if an iterator has any more fields.
+ *
+ * @param iter the message iter
+ * @returns #TRUE if there are more fields
+ * following
+ */
+dbus_bool_t
+dbus_message_iter_has_next (DBusMessageIter *iter)
+{
+ int end_pos;
+
+ if (!_dbus_marshal_get_arg_end_pos (&iter->message->body,
+ iter->message->byte_order,
+ iter->pos, &end_pos))
+ return FALSE;
+
+ if (end_pos >= _dbus_string_get_length (&iter->message->body))
+ return FALSE;
+
+ return TRUE;
+}
+
+/**
+ * Moves the iterator to the next field.
+ *
+ * @param iter The message iter
+ * @returns #TRUE if the iterator was moved to the next field
+ */
+dbus_bool_t
+dbus_message_iter_next (DBusMessageIter *iter)
+{
+ int end_pos;
+
+ if (!_dbus_marshal_get_arg_end_pos (&iter->message->body,
+ iter->message->byte_order,
+ iter->pos, &end_pos))
+ return FALSE;
+
+ if (end_pos >= _dbus_string_get_length (&iter->message->body))
+ return FALSE;
+
+ iter->pos = end_pos;
+
+ return TRUE;
+}
+
+/**
+ * Returns the argument type of the argument that the
+ * message iterator points at.
+ *
+ * @param iter the message iter
+ * @returns the field type
+ */
+int
+dbus_message_iter_get_arg_type (DBusMessageIter *iter)
+{
+ const char *data;
+
+ if (iter->pos >= _dbus_string_get_length (&iter->message->body))
+ return DBUS_TYPE_INVALID;
+
+ data = _dbus_string_get_const_data_len (&iter->message->body, iter->pos, 1);
+
+ if (*data > DBUS_TYPE_INVALID && *data <= DBUS_TYPE_DICT)
+ return *data;
+
+ return DBUS_TYPE_INVALID;
+}
+
+/**
+ * Returns the string value that an iterator may point to.
+ * Note that you need to check that the iterator points to
+ * a string value before using this function.
+ *
+ * @see dbus_message_iter_get_arg_type
+ * @param iter the message iter
+ * @returns the string
+ */
+char *
+dbus_message_iter_get_string (DBusMessageIter *iter)
+{
+ _dbus_assert (dbus_message_iter_get_arg_type (iter) == DBUS_TYPE_STRING);
+
+ return _dbus_demarshal_string (&iter->message->body, iter->message->byte_order,
+ iter->pos + 1, NULL);
+}
+
+/**
+ * Returns the boolean value that an iterator may point to.
+ * Note that you need to check that the iterator points to
+ * a boolean value before using this function.
+ *
+ * @see dbus_message_iter_get_arg_type
+ * @param iter the message iter
+ * @returns the string
+ */
+dbus_bool_t
+dbus_message_iter_get_boolean (DBusMessageIter *iter)
+{
+ unsigned char value;
+
+ _dbus_assert (dbus_message_iter_get_arg_type (iter) == DBUS_TYPE_BOOLEAN);
+
+ value = _dbus_string_get_byte (&iter->message->body, iter->pos + 1);
+
+ return value;
+}
+
+/**
+ * Returns the 32 bit signed integer value that an iterator may point to.
+ * Note that you need to check that the iterator points to
+ * an integer value before using this function.
+ *
+ * @see dbus_message_iter_get_arg_type
+ * @param iter the message iter
+ * @returns the integer
+ */
+int
+dbus_message_iter_get_int32 (DBusMessageIter *iter)
+{
+ _dbus_assert (dbus_message_iter_get_arg_type (iter) == DBUS_TYPE_INT32);
+
+ return _dbus_demarshal_int32 (&iter->message->body, iter->message->byte_order,
+ iter->pos + 1, NULL);
+}
+
+/**
+ * Returns the 32 bit unsigned integer value that an iterator may point to.
+ * Note that you need to check that the iterator points to
+ * an unsigned integer value before using this function.
+ *
+ * @see dbus_message_iter_get_arg_type
+ * @param iter the message iter
+ * @returns the integer
+ */
+int
+dbus_message_iter_get_uint32 (DBusMessageIter *iter)
+{
+ _dbus_assert (dbus_message_iter_get_arg_type (iter) == DBUS_TYPE_UINT32);
+
+ return _dbus_demarshal_uint32 (&iter->message->body, iter->message->byte_order,
+ iter->pos + 1, NULL);
+}
+
+/**
+ * Returns the double value that an iterator may point to.
+ * Note that you need to check that the iterator points to
+ * a string value before using this function.
+ *
+ * @see dbus_message_iter_get_arg_type
+ * @param iter the message iter
+ * @returns the double
+ */
+double
+dbus_message_iter_get_double (DBusMessageIter *iter)
+{
+ _dbus_assert (dbus_message_iter_get_arg_type (iter) == DBUS_TYPE_DOUBLE);
+
+ return _dbus_demarshal_double (&iter->message->body, iter->message->byte_order,
+ iter->pos + 1, NULL);
+}
+
+/**
+ * Returns the boolean array that the iterator may point to. Note that
+ * you need to check that the iterator points to an array of the
+ * correct type prior to using this function.
+ *
+ * @param iter the iterator
+ * @param value return location for the array
+ * @param len return location for the array length
+ * @returns #TRUE on success
+ */
+dbus_bool_t
+dbus_message_iter_get_boolean_array (DBusMessageIter *iter,
+ unsigned char **value,
+ int *len)
+{
+ _dbus_assert (dbus_message_iter_get_arg_type (iter) == DBUS_TYPE_BOOLEAN_ARRAY);
+
+ if (!_dbus_demarshal_byte_array (&iter->message->body, iter->message->byte_order,
+ iter->pos + 1, NULL, value, len))
+ return FALSE;
+ else
+ return TRUE;
+}
+
+/**
+ * Returns the 32 bit signed integer array that the iterator may point
+ * to. Note that you need to check that the iterator points to an
+ * array of the correct type prior to using this function.
+ *
+ * @param iter the iterator
+ * @param value return location for the array
+ * @param len return location for the array length
+ * @returns #TRUE on success
+ */
+dbus_bool_t
+dbus_message_iter_get_int32_array (DBusMessageIter *iter,
+ dbus_int32_t **value,
+ int *len)
+{
+ _dbus_assert (dbus_message_iter_get_arg_type (iter) == DBUS_TYPE_INT32_ARRAY);
+
+ if (!_dbus_demarshal_int32_array (&iter->message->body, iter->message->byte_order,
+ iter->pos + 1, NULL, value, len))
+ return FALSE;
+ else
+ return TRUE;
+}
+
+/**
+ * Returns the 32 bit unsigned integer array that the iterator may point
+ * to. Note that you need to check that the iterator points to an
+ * array of the correct type prior to using this function.
+ *
+ * @param iter the iterator
+ * @param value return location for the array
+ * @param len return location for the array length
+ * @returns #TRUE on success
+ */
+dbus_bool_t
+dbus_message_iter_get_uint32_array (DBusMessageIter *iter,
+ dbus_uint32_t **value,
+ int *len)
+{
+ _dbus_assert (dbus_message_iter_get_arg_type (iter) == DBUS_TYPE_UINT32_ARRAY);
+
+ if (!_dbus_demarshal_uint32_array (&iter->message->body, iter->message->byte_order,
+ iter->pos + 1, NULL, value, len))
+ return FALSE;
+ else
+ return TRUE;
+}
+
+/**
+ * Returns the double array that the iterator may point to. Note that
+ * you need to check that the iterator points to an array of the
+ * correct type prior to using this function.
+ *
+ * @param iter the iterator
+ * @param value return location for the array
+ * @param len return location for the array length
+ * @returns #TRUE on success
+ */
+dbus_bool_t
+dbus_message_iter_get_double_array (DBusMessageIter *iter,
+ double **value,
+ int *len)
+{
+ _dbus_assert (dbus_message_iter_get_arg_type (iter) == DBUS_TYPE_DOUBLE_ARRAY);
+
+ if (!_dbus_demarshal_double_array (&iter->message->body, iter->message->byte_order,
+ iter->pos + 1, NULL, value, len))
+ return FALSE;
+ else
+ return TRUE;
+}
+
+/**
+ * Returns the byte array that the iterator may point to.
+ * Note that you need to check that the iterator points
+ * to a byte array prior to using this function.
+ *
+ * @param iter the iterator
+ * @param value return location for array values
+ * @param len return location for length of byte array
+ * @returns #TRUE on success
+ */
+dbus_bool_t
+dbus_message_iter_get_byte_array (DBusMessageIter *iter,
+ unsigned char **value,
+ int *len)
+{
+ _dbus_assert (dbus_message_iter_get_arg_type (iter) == DBUS_TYPE_BYTE_ARRAY);
+
+ if (!_dbus_demarshal_byte_array (&iter->message->body, iter->message->byte_order,
+ iter->pos + 1, NULL, value, len))
+ return FALSE;
+ else
+ return TRUE;
+}
+
+/**
+ * Returns the string array that the iterator may point to.
+ * Note that you need to check that the iterator points
+ * to a byte array prior to using this function.
+ *
+ * The returned value is a #NULL-terminated array of strings.
+ * Each string is a separate malloc block, and the array
+ * itself is a malloc block. You can free this type of
+ * string array with dbus_free_string_array().
+ *
+ * @param iter the iterator
+ * @param value return location for string values
+ * @param len return location for length of byte array
+ * @returns #TRUE on success
+ */
+dbus_bool_t
+dbus_message_iter_get_string_array (DBusMessageIter *iter,
+ char ***value,
+ int *len)
+{
+ _dbus_assert (dbus_message_iter_get_arg_type (iter) == DBUS_TYPE_STRING_ARRAY);
+
+ if (!_dbus_demarshal_string_array (&iter->message->body, iter->message->byte_order,
+ iter->pos + 1, NULL, value, len))
+ return FALSE;
+ else
+ return TRUE;
+}
+
+/**
+ * Returns the dict that the iterator may point to.
+ * Note that you need to check that the iterator points
+ * to a dict prior to using this function.
+ *
+ * @param iter the iterator
+ * @param dict return location for dict
+ * @returns #TRUE on success
+ */
+dbus_bool_t
+dbus_message_iter_get_dict (DBusMessageIter *iter,
+ DBusDict **dict)
+{
+ _dbus_assert (dbus_message_iter_get_arg_type (iter) == DBUS_TYPE_DICT);
+
+ if (!_dbus_demarshal_dict (&iter->message->body, iter->message->byte_order,
+ iter->pos + 1, NULL, dict))
+ return FALSE;
+ else
+ return TRUE;
+}
+
+/**
+ * Sets the message sender.
+ *
+ * @param message the message
+ * @param sender the sender
+ * @returns #FALSE if not enough memory
+ */
+dbus_bool_t
+dbus_message_set_sender (DBusMessage *message,
+ const char *sender)
+{
+ _dbus_assert (!message->locked);
+
+ if (sender == NULL)
+ {
+ delete_string_field (message, FIELD_SENDER);
+ return TRUE;
+ }
+ else
+ {
+ return set_string_field (message,
+ FIELD_SENDER,
+ sender);
+ }
+}
+
+/**
+ * Sets a flag indicating that the message is an error reply
+ * message, i.e. an "exception" rather than a normal response.
+ *
+ * @param message the message
+ * @param is_error_reply #TRUE if this is an error message.
+ */
+void
+dbus_message_set_is_error (DBusMessage *message,
+ dbus_bool_t is_error_reply)
+{
+ char *header;
+
+ _dbus_assert (!message->locked);
+
+ header = _dbus_string_get_data_len (&message->header, 1, 1);
+
+ if (is_error_reply)
+ *header |= DBUS_HEADER_FLAG_ERROR;
+ else
+ *header &= ~DBUS_HEADER_FLAG_ERROR;
+}
+
+/**
+ * Returns #TRUE if the message is an error
+ * reply to some previous message we sent.
+ *
+ * @param message the message
+ * @returns #TRUE if the message is an error
+ */
+dbus_bool_t
+dbus_message_get_is_error (DBusMessage *message)
+{
+ const char *header;
+
+ header = _dbus_string_get_const_data_len (&message->header, 1, 1);
+
+ return (*header & DBUS_HEADER_FLAG_ERROR) != 0;
+}
+
+/**
+ * Gets the service which originated this message,
+ * or #NULL if unknown or inapplicable.
+ *
+ * @param message the message
+ * @returns the service name or #NULL
+ */
+const char*
+dbus_message_get_sender (DBusMessage *message)
+{
+ return get_string_field (message, FIELD_SENDER, NULL);
+}
+
+/**
+ * Checks whether the message has the given name.
+ * If the message has no name or has a different
+ * name, returns #FALSE.
+ *
+ * @param message the message
+ * @param name the name to check (must not be #NULL)
+ *
+ * @returns #TRUE if the message has the given name
+ */
+dbus_bool_t
+dbus_message_name_is (DBusMessage *message,
+ const char *name)
+{
+ const char *n;
+
+ _dbus_assert (name != NULL);
+
+ n = dbus_message_get_name (message);
+
+ if (n && strcmp (n, name) == 0)
+ return TRUE;
+ else
+ return FALSE;
+}
+
+/**
+ * Checks whether the message was sent to the given service. If the
+ * message has no service specified or has a different name, returns
+ * #FALSE.
+ *
+ * @param message the message
+ * @param service the service to check (must not be #NULL)
+ *
+ * @returns #TRUE if the message has the given destination service
+ */
+dbus_bool_t
+dbus_message_service_is (DBusMessage *message,
+ const char *service)
+{
+ const char *s;
+
+ _dbus_assert (service != NULL);
+
+ s = dbus_message_get_service (message);
+
+ if (s && strcmp (s, service) == 0)
+ return TRUE;
+ else
+ return FALSE;
+}
+
+/**
+ * Checks whether the message has the given service as its sender. If
+ * the message has no sender specified or has a different sender,
+ * returns #FALSE. Note that if a peer application owns multiple
+ * services, its messages will have only one of those services as the
+ * sender (usually the base service). So you can't use this
+ * function to prove the sender didn't own service Foo, you can
+ * only use it to prove that it did.
+ *
+ * @param message the message
+ * @param service the service to check (must not be #NULL)
+ *
+ * @returns #TRUE if the message has the given origin service
+ */
+dbus_bool_t
+dbus_message_sender_is (DBusMessage *message,
+ const char *service)
+{
+ const char *s;
+
+ _dbus_assert (service != NULL);
+
+ s = dbus_message_get_sender (message);
+
+ if (s && strcmp (s, service) == 0)
+ return TRUE;
+ else
+ return FALSE;
+}
+
+/** @} */
+
+/**
+ * @addtogroup DBusMessageInternals
+ *
+ * @{
+ */
+/**
+ * @typedef DBusMessageLoader
+ *
+ * The DBusMessageLoader object encapsulates the process of converting
+ * a byte stream into a series of DBusMessage. It buffers the incoming
+ * bytes as efficiently as possible, and generates a queue of
+ * messages. DBusMessageLoader is typically used as part of a
+ * DBusTransport implementation. The DBusTransport then hands off
+ * the loaded messages to a DBusConnection, making the messages
+ * visible to the application.
+ *
+ * @todo write tests for break-loader that a) randomly delete header
+ * fields and b) set string fields to zero-length and other funky
+ * values.
+ *
+ */
+
+/* we definitely use signed ints for sizes, so don't exceed
+ * _DBUS_INT_MAX; and add 16 for paranoia, since a message
+ * over 128M is pretty nuts anyhow.
+ */
+
+/**
+ * The maximum sane message size.
+ */
+#define MAX_SANE_MESSAGE_SIZE (_DBUS_INT_MAX/16)
+
+/**
+ * Implementation details of DBusMessageLoader.
+ * All members are private.
+ */
+struct DBusMessageLoader
+{
+ int refcount; /**< Reference count. */
+
+ DBusString data; /**< Buffered data */
+
+ DBusList *messages; /**< Complete messages. */
+
+ long max_message_size; /**< Maximum size of a message */
+
+ unsigned int buffer_outstanding : 1; /**< Someone is using the buffer to read */
+
+ unsigned int corrupted : 1; /**< We got broken data, and are no longer working */
+};
+
+/**
+ * The initial buffer size of the message loader.
+ *
+ * @todo this should be based on min header size plus some average
+ * body size, or something. Or rather, the min header size only, if we
+ * want to try to read only the header, store that in a DBusMessage,
+ * then read only the body and store that, etc., depends on
+ * how we optimize _dbus_message_loader_get_buffer() and what
+ * the exact message format is.
+ */
+#define INITIAL_LOADER_DATA_LEN 32
+
+/**
+ * Creates a new message loader. Returns #NULL if memory can't
+ * be allocated.
+ *
+ * @returns new loader, or #NULL.
+ */
+DBusMessageLoader*
+_dbus_message_loader_new (void)
+{
+ DBusMessageLoader *loader;
+
+ loader = dbus_new0 (DBusMessageLoader, 1);
+ if (loader == NULL)
+ return NULL;
+
+ loader->refcount = 1;
+
+ /* Try to cap message size at something that won't *totally* hose
+ * the system if we have a couple of them.
+ */
+ loader->max_message_size = _DBUS_ONE_MEGABYTE * 32;
+
+ if (!_dbus_string_init (&loader->data))
+ {
+ dbus_free (loader);
+ return NULL;
+ }
+
+ /* preallocate the buffer for speed, ignore failure */
+ _dbus_string_set_length (&loader->data, INITIAL_LOADER_DATA_LEN);
+ _dbus_string_set_length (&loader->data, 0);
+
+ return loader;
+}
+
+/**
+ * Increments the reference count of the loader.
+ *
+ * @param loader the loader.
+ */
+void
+_dbus_message_loader_ref (DBusMessageLoader *loader)
+{
+ loader->refcount += 1;
+}
+
+/**
+ * Decrements the reference count of the loader and finalizes the
+ * loader when the count reaches zero.
+ *
+ * @param loader the loader.
+ */
+void
+_dbus_message_loader_unref (DBusMessageLoader *loader)
+{
+ loader->refcount -= 1;
+ if (loader->refcount == 0)
+ {
+ _dbus_list_foreach (&loader->messages,
+ (DBusForeachFunction) dbus_message_unref,
+ NULL);
+ _dbus_list_clear (&loader->messages);
+ _dbus_string_free (&loader->data);
+ dbus_free (loader);
+ }
+}
+
+/**
+ * Gets the buffer to use for reading data from the network. Network
+ * data is read directly into an allocated buffer, which is then used
+ * in the DBusMessage, to avoid as many extra memcpy's as possible.
+ * The buffer must always be returned immediately using
+ * _dbus_message_loader_return_buffer(), even if no bytes are
+ * successfully read.
+ *
+ * @todo this function can be a lot more clever. For example
+ * it can probably always return a buffer size to read exactly
+ * the body of the next message, thus avoiding any memory wastage
+ * or reallocs.
+ *
+ * @todo we need to enforce a max length on strings in header fields.
+ *
+ * @param loader the message loader.
+ * @param buffer the buffer
+ */
+void
+_dbus_message_loader_get_buffer (DBusMessageLoader *loader,
+ DBusString **buffer)
+{
+ _dbus_assert (!loader->buffer_outstanding);
+
+ *buffer = &loader->data;
+
+ loader->buffer_outstanding = TRUE;
+}
+
+/**
+ * The smallest header size that can occur.
+ * (It won't be valid)
+ */
+#define DBUS_MINIMUM_HEADER_SIZE 16
+
+/** Pack four characters as in "abcd" into a uint32 */
+#define FOUR_CHARS_TO_UINT32(a, b, c, d) \
+ ((((dbus_uint32_t)a) << 24) | \
+ (((dbus_uint32_t)b) << 16) | \
+ (((dbus_uint32_t)c) << 8) | \
+ ((dbus_uint32_t)d))
+
+/** DBUS_HEADER_FIELD_NAME packed into a dbus_uint32_t */
+#define DBUS_HEADER_FIELD_NAME_AS_UINT32 \
+ FOUR_CHARS_TO_UINT32 ('n', 'a', 'm', 'e')
+
+/** DBUS_HEADER_FIELD_SERVICE packed into a dbus_uint32_t */
+#define DBUS_HEADER_FIELD_SERVICE_AS_UINT32 \
+ FOUR_CHARS_TO_UINT32 ('s', 'r', 'v', 'c')
+
+/** DBUS_HEADER_FIELD_REPLY packed into a dbus_uint32_t */
+#define DBUS_HEADER_FIELD_REPLY_AS_UINT32 \
+ FOUR_CHARS_TO_UINT32 ('r', 'p', 'l', 'y')
+
+/** DBUS_HEADER_FIELD_SENDER Packed into a dbus_uint32_t */
+#define DBUS_HEADER_FIELD_SENDER_AS_UINT32 \
+ FOUR_CHARS_TO_UINT32 ('s', 'n', 'd', 'r')
+
+/* FIXME impose max length on name, srvc, sndr */
+static dbus_bool_t
+decode_header_data (const DBusString *data,
+ int header_len,
+ int byte_order,
+ HeaderField fields[FIELD_LAST],
+ int *message_padding)
+{
+ const char *field;
+ int pos, new_pos;
+ int i;
+
+ if (header_len < 16)
+ return FALSE;
+
+ i = 0;
+ while (i < FIELD_LAST)
+ {
+ fields[i].offset = -1;
+ ++i;
+ }
+
+ fields[FIELD_HEADER_LENGTH].offset = 4;
+ fields[FIELD_BODY_LENGTH].offset = 8;
+ fields[FIELD_CLIENT_SERIAL].offset = 12;
+
+ /* Now handle the named fields. A real named field is at least 4
+ * bytes for the name, plus a type code (1 byte) plus padding. So
+ * if we have less than 8 bytes left, it must be alignment padding,
+ * not a field. While >= 8 bytes can't be entirely alignment
+ * padding.
+ */
+ pos = 16;
+ while ((pos + 7) < header_len)
+ {
+ pos = _DBUS_ALIGN_VALUE (pos, 4);
+
+ if ((pos + 4) > header_len)
+ return FALSE;
+
+ field =_dbus_string_get_const_data_len (data, pos, 4);
+ pos += 4;
+
+ _dbus_assert (_DBUS_ALIGN_ADDRESS (field, 4) == field);
+
+ /* I believe FROM_BE is right, but if not we'll find out
+ * I guess. ;-)
+ */
+ switch (DBUS_UINT32_FROM_BE (*(int*)field))
+ {
+ case DBUS_HEADER_FIELD_SERVICE_AS_UINT32:
+ if (fields[FIELD_SERVICE].offset >= 0)
+ {
+ _dbus_verbose ("%s field provided twice\n",
+ DBUS_HEADER_FIELD_SERVICE);
+ return FALSE;
+ }
+
+ fields[FIELD_SERVICE].offset = _DBUS_ALIGN_VALUE (pos + 1, 4);
+#if 0
+ _dbus_verbose ("Found service name at offset %d\n",
+ fields[FIELD_SERVICE].offset);
+#endif
+ break;
+
+ case DBUS_HEADER_FIELD_NAME_AS_UINT32:
+ if (fields[FIELD_NAME].offset >= 0)
+ {
+ _dbus_verbose ("%s field provided twice\n",
+ DBUS_HEADER_FIELD_NAME);
+ return FALSE;
+ }
+
+ fields[FIELD_NAME].offset = _DBUS_ALIGN_VALUE (pos + 1, 4);
+
+#if 0
+ _dbus_verbose ("Found message name at offset %d\n",
+ fields[FIELD_NAME].offset);
+#endif
+ break;
+ case DBUS_HEADER_FIELD_SENDER_AS_UINT32:
+ if (fields[FIELD_SENDER].offset >= 0)
+ {
+ _dbus_verbose ("%s field provided twice\n",
+ DBUS_HEADER_FIELD_SENDER);
+ return FALSE;
+ }
+
+ fields[FIELD_SENDER].offset = _DBUS_ALIGN_VALUE (pos + 1, 4);
+
+ _dbus_verbose ("Found sender name at offset %d\n",
+ fields[FIELD_NAME].offset);
+ break;
+
+ case DBUS_HEADER_FIELD_REPLY_AS_UINT32:
+ if (fields[FIELD_REPLY_SERIAL].offset >= 0)
+ {
+ _dbus_verbose ("%s field provided twice\n",
+ DBUS_HEADER_FIELD_REPLY);
+ return FALSE;
+ }
+
+ fields[FIELD_REPLY_SERIAL].offset = _DBUS_ALIGN_VALUE (pos + 1, 4);
+
+ _dbus_verbose ("Found reply serial at offset %d\n",
+ fields[FIELD_REPLY_SERIAL].offset);
+ break;
+
+ default:
+ _dbus_verbose ("Ignoring an unknown header field: %c%c%c%c at offset %d\n",
+ field[0], field[1], field[2], field[3], pos);
+ }
+
+ if (!_dbus_marshal_validate_arg (data, byte_order, pos, &new_pos))
+ {
+ _dbus_verbose ("Failed to validate argument to named header field\n");
+ return FALSE;
+ }
+
+ if (new_pos > header_len)
+ {
+ _dbus_verbose ("Named header field tries to extend beyond header length\n");
+ return FALSE;
+ }
+
+ pos = new_pos;
+ }
+
+ if (pos < header_len)
+ {
+ /* Alignment padding, verify that it's nul */
+ _dbus_assert ((header_len - pos) < 8);
+
+ if (!_dbus_string_validate_nul (data,
+ pos, (header_len - pos)))
+ {
+ _dbus_verbose ("header alignment padding is not nul\n");
+ return FALSE;
+ }
+ }
+
+ if (fields[FIELD_NAME].offset < 0)
+ {
+ _dbus_verbose ("No %s field provided\n",
+ DBUS_HEADER_FIELD_NAME);
+ return FALSE;
+ }
+
+ if (message_padding)
+ *message_padding = header_len - pos;
+
+ return TRUE;
+}
+
+/**
+ * Returns a buffer obtained from _dbus_message_loader_get_buffer(),
+ * indicating to the loader how many bytes of the buffer were filled
+ * in. This function must always be called, even if no bytes were
+ * successfully read.
+ *
+ * @param loader the loader.
+ * @param buffer the buffer.
+ * @param bytes_read number of bytes that were read into the buffer.
+ */
+void
+_dbus_message_loader_return_buffer (DBusMessageLoader *loader,
+ DBusString *buffer,
+ int bytes_read)
+{
+ _dbus_assert (loader->buffer_outstanding);
+ _dbus_assert (buffer == &loader->data);
+
+ loader->buffer_outstanding = FALSE;
+}
+
+/**
+ * Converts buffered data into messages.
+ *
+ * @param loader the loader.
+ * @returns #TRUE if we had enough memory to finish.
+ */
+dbus_bool_t
+_dbus_message_loader_queue_messages (DBusMessageLoader *loader)
+{
+ if (loader->corrupted)
+ return TRUE;
+
+ while (_dbus_string_get_length (&loader->data) >= 16)
+ {
+ DBusMessage *message;
+ const char *header_data;
+ int byte_order, header_len, body_len, header_padding;
+ dbus_uint32_t header_len_unsigned, body_len_unsigned;
+
+ header_data = _dbus_string_get_const_data_len (&loader->data, 0, 16);
+
+ _dbus_assert (_DBUS_ALIGN_ADDRESS (header_data, 4) == header_data);
+
+ if (header_data[2] != DBUS_MAJOR_PROTOCOL_VERSION)
+ {
+ _dbus_verbose ("Message has protocol version %d ours is %d\n",
+ (int) header_data[2], DBUS_MAJOR_PROTOCOL_VERSION);
+ loader->corrupted = TRUE;
+ return TRUE;
+ }
+
+ byte_order = header_data[0];
+
+ if (byte_order != DBUS_LITTLE_ENDIAN &&
+ byte_order != DBUS_BIG_ENDIAN)
+ {
+ _dbus_verbose ("Message with bad byte order '%c' received\n",
+ byte_order);
+ loader->corrupted = TRUE;
+ return TRUE;
+ }
+
+ header_len_unsigned = _dbus_unpack_uint32 (byte_order, header_data + 4);
+ body_len_unsigned = _dbus_unpack_uint32 (byte_order, header_data + 8);
+
+ if (header_len_unsigned < 16)
+ {
+ _dbus_verbose ("Message had broken too-small header length %u\n",
+ header_len_unsigned);
+ loader->corrupted = TRUE;
+ return TRUE;
+ }
+
+ if (header_len_unsigned > (unsigned) MAX_SANE_MESSAGE_SIZE ||
+ body_len_unsigned > (unsigned) MAX_SANE_MESSAGE_SIZE)
+ {
+ _dbus_verbose ("Header or body length too large (%u %u)\n",
+ header_len_unsigned,
+ body_len_unsigned);
+ loader->corrupted = TRUE;
+ return TRUE;
+ }
+
+ /* Now that we know the values are in signed range, get
+ * rid of stupid unsigned, just causes bugs
+ */
+ header_len = header_len_unsigned;
+ body_len = body_len_unsigned;
+
+ if (_DBUS_ALIGN_VALUE (header_len, 8) != header_len_unsigned)
+ {
+
+ _dbus_verbose ("header length %d is not aligned to 8 bytes\n",
+ header_len);
+ loader->corrupted = TRUE;
+ return TRUE;
+ }
+
+ if (header_len + body_len > loader->max_message_size)
+ {
+ _dbus_verbose ("Message claimed length header = %d body = %d exceeds max message length %ld\n",
+ header_len, body_len, loader->max_message_size);
+ loader->corrupted = TRUE;
+ return TRUE;
+ }
+
+ if (_dbus_string_get_length (&loader->data) >= (header_len + body_len))
+ {
+ HeaderField fields[FIELD_LAST];
+ int i;
+ int next_arg;
+
+#if 0
+ _dbus_verbose_bytes_of_string (&loader->data, 0, header_len + body_len);
+#endif
+ if (!decode_header_data (&loader->data, header_len, byte_order,
+ fields, &header_padding))
+ {
+ _dbus_verbose ("Header was invalid\n");
+ loader->corrupted = TRUE;
+ return TRUE;
+ }
+
+ next_arg = header_len;
+ while (next_arg < (header_len + body_len))
+ {
+ int prev = next_arg;
+
+ if (!_dbus_marshal_validate_arg (&loader->data,
+ byte_order,
+ next_arg,
+ &next_arg))
+ {
+ loader->corrupted = TRUE;
+ return TRUE;
+ }
+
+ _dbus_assert (next_arg > prev);
+ }
+
+ if (next_arg > (header_len + body_len))
+ {
+ _dbus_verbose ("end of last arg at %d but message has len %d+%d=%d\n",
+ next_arg, header_len, body_len,
+ header_len + body_len);
+ loader->corrupted = TRUE;
+ return TRUE;
+ }
+
+ message = dbus_message_new_empty_header ();
+ if (message == NULL)
+ return FALSE;
+
+ message->byte_order = byte_order;
+ message->header_padding = header_padding;
+
+ /* Copy in the offsets we found */
+ i = 0;
+ while (i < FIELD_LAST)
+ {
+ message->header_fields[i] = fields[i];
+ ++i;
+ }
+
+ if (!_dbus_list_append (&loader->messages, message))
+ {
+ dbus_message_unref (message);
+ return FALSE;
+ }
+
+ _dbus_assert (_dbus_string_get_length (&message->header) == 0);
+ _dbus_assert (_dbus_string_get_length (&message->body) == 0);
+
+ _dbus_assert (_dbus_string_get_length (&loader->data) >=
+ (header_len + body_len));
+
+ if (!_dbus_string_move_len (&loader->data, 0, header_len, &message->header, 0))
+ {
+ _dbus_list_remove_last (&loader->messages, message);
+ dbus_message_unref (message);
+ return FALSE;
+ }
+
+ if (!_dbus_string_move_len (&loader->data, 0, body_len, &message->body, 0))
+ {
+ dbus_bool_t result;
+
+ /* put the header back, we'll try again later */
+ result = _dbus_string_copy_len (&message->header, 0, header_len,
+ &loader->data, 0);
+ _dbus_assert (result); /* because DBusString never reallocs smaller */
+
+ _dbus_list_remove_last (&loader->messages, message);
+ dbus_message_unref (message);
+ return FALSE;
+ }
+
+ _dbus_assert (_dbus_string_get_length (&message->header) == header_len);
+ _dbus_assert (_dbus_string_get_length (&message->body) == body_len);
+
+ /* Fill in caches */
+ message->reply_serial = get_int_field (message,
+ FIELD_REPLY_SERIAL);
+ message->client_serial = get_int_field (message,
+ FIELD_CLIENT_SERIAL);
+
+ _dbus_verbose ("Loaded message %p\n", message);
+ }
+ else
+ return TRUE;
+ }
+
+ return TRUE;
+}
+
+/**
+ * Peeks at first loaded message, returns #NULL if no messages have
+ * been queued.
+ *
+ * @param loader the loader.
+ * @returns the next message, or #NULL if none.
+ */
+DBusMessage*
+_dbus_message_loader_peek_message (DBusMessageLoader *loader)
+{
+ if (loader->messages)
+ return loader->messages->data;
+ else
+ return NULL;
+}
+
+/**
+ * Pops a loaded message (passing ownership of the message
+ * to the caller). Returns #NULL if no messages have been
+ * queued.
+ *
+ * @param loader the loader.
+ * @returns the next message, or #NULL if none.
+ */
+DBusMessage*
+_dbus_message_loader_pop_message (DBusMessageLoader *loader)
+{
+ return _dbus_list_pop_first (&loader->messages);
+}
+
+/**
+ * Pops a loaded message inside a list link (passing ownership of the
+ * message and link to the caller). Returns #NULL if no messages have
+ * been loaded.
+ *
+ * @param loader the loader.
+ * @returns the next message link, or #NULL if none.
+ */
+DBusList*
+_dbus_message_loader_pop_message_link (DBusMessageLoader *loader)
+{
+ return _dbus_list_pop_first_link (&loader->messages);
+}
+
+/**
+ * Checks whether the loader is confused due to bad data.
+ * If messages are received that are invalid, the
+ * loader gets confused and gives up permanently.
+ * This state is called "corrupted."
+ *
+ * @param loader the loader
+ * @returns #TRUE if the loader is hosed.
+ */
+dbus_bool_t
+_dbus_message_loader_get_is_corrupted (DBusMessageLoader *loader)
+{
+ return loader->corrupted;
+}
+
+/**
+ * Sets the maximum size message we allow.
+ *
+ * @param loader the loader
+ * @param size the max message size in bytes
+ */
+void
+_dbus_message_loader_set_max_message_size (DBusMessageLoader *loader,
+ long size)
+{
+ if (size > MAX_SANE_MESSAGE_SIZE)
+ {
+ _dbus_verbose ("clamping requested max message size %ld to %d\n",
+ size, MAX_SANE_MESSAGE_SIZE);
+ size = MAX_SANE_MESSAGE_SIZE;
+ }
+ loader->max_message_size = size;
+}
+
+/**
+ * Gets the maximum allowed message size in bytes.
+ *
+ * @param loader the loader
+ * @returns max size in bytes
+ */
+long
+_dbus_message_loader_get_max_message_size (DBusMessageLoader *loader)
+{
+ return loader->max_message_size;
+}
+
+/** @} */
+#ifdef DBUS_BUILD_TESTS
+#include "dbus-test.h"
+#include <stdio.h>
+
+static void
+message_iter_test (DBusMessage *message)
+{
+ DBusMessageIter *iter;
+ char *str;
+
+ iter = dbus_message_get_args_iter (message);
+
+ /* String tests */
+ if (dbus_message_iter_get_arg_type (iter) != DBUS_TYPE_STRING)
+ _dbus_assert_not_reached ("Argument type isn't string");
+
+ str = dbus_message_iter_get_string (iter);
+ if (strcmp (str, "Test string") != 0)
+ _dbus_assert_not_reached ("Strings differ");
+ dbus_free (str);
+
+ if (!dbus_message_iter_next (iter))
+ _dbus_assert_not_reached ("Reached end of arguments");
+
+ /* Signed integer tests */
+ if (dbus_message_iter_get_arg_type (iter) != DBUS_TYPE_INT32)
+ _dbus_assert_not_reached ("Argument type isn't int32");
+
+ if (dbus_message_iter_get_int32 (iter) != -0x12345678)
+ _dbus_assert_not_reached ("Signed integers differ");
+
+ if (!dbus_message_iter_next (iter))
+ _dbus_assert_not_reached ("Reached end of fields");
+
+ /* Unsigned integer tests */
+ if (dbus_message_iter_get_arg_type (iter) != DBUS_TYPE_UINT32)
+ _dbus_assert_not_reached ("Argument type isn't int32");
+
+ if (dbus_message_iter_get_uint32 (iter) != 0xedd1e)
+ _dbus_assert_not_reached ("Unsigned integers differ");
+
+ if (!dbus_message_iter_next (iter))
+ _dbus_assert_not_reached ("Reached end of arguments");
+
+ /* Double tests */
+ if (dbus_message_iter_get_arg_type (iter) != DBUS_TYPE_DOUBLE)
+ _dbus_assert_not_reached ("Argument type isn't double");
+
+ if (dbus_message_iter_get_double (iter) != 3.14159)
+ _dbus_assert_not_reached ("Doubles differ");
+
+ if (dbus_message_iter_next (iter))
+ _dbus_assert_not_reached ("Didn't reach end of arguments");
+
+ dbus_message_iter_unref (iter);
+}
+
+static dbus_bool_t
+check_message_handling (DBusMessage *message)
+{
+ DBusMessageIter *iter;
+ int type;
+ dbus_bool_t retval;
+ dbus_int32_t client_serial;
+
+ retval = FALSE;
+ iter = NULL;
+
+ client_serial = dbus_message_get_serial (message);
+
+ /* can't use set_serial due to the assertions at the start of it */
+ set_int_field (message, FIELD_CLIENT_SERIAL,
+ client_serial);
+
+ if (client_serial != dbus_message_get_serial (message))
+ {
+ _dbus_warn ("get/set cycle for client_serial did not succeed\n");
+ goto failed;
+ }
+
+ /* If we implement message_set_arg (message, n, value)
+ * then we would want to test it here
+ */
+
+ iter = dbus_message_get_args_iter (message);
+ while ((type = dbus_message_iter_get_arg_type (iter)) != DBUS_TYPE_INVALID)
+ {
+ switch (type)
+ {
+ case DBUS_TYPE_NIL:
+ break;
+ case DBUS_TYPE_INT32:
+ dbus_message_iter_get_int32 (iter);
+ break;
+ case DBUS_TYPE_UINT32:
+ dbus_message_iter_get_uint32 (iter);
+ break;
+ case DBUS_TYPE_DOUBLE:
+ dbus_message_iter_get_double (iter);
+ break;
+ case DBUS_TYPE_STRING:
+ {
+ char *str;
+ str = dbus_message_iter_get_string (iter);
+ dbus_free (str);
+ }
+ break;
+ case DBUS_TYPE_BOOLEAN_ARRAY:
+ {
+ unsigned char *values;
+ int len;
+
+ if (!dbus_message_iter_get_boolean_array (iter, &values, &len))
+ return FALSE;
+
+ dbus_free (values);
+ }
+ break;
+ case DBUS_TYPE_INT32_ARRAY:
+ {
+ dbus_int32_t *values;
+ int len;
+
+ if (!dbus_message_iter_get_int32_array (iter, &values, &len))
+ return FALSE;
+
+ dbus_free (values);
+ }
+ break;
+ case DBUS_TYPE_UINT32_ARRAY:
+ {
+ dbus_uint32_t *values;
+ int len;
+
+ if (!dbus_message_iter_get_uint32_array (iter, &values, &len))
+ return FALSE;
+
+ dbus_free (values);
+ }
+ break;
+ case DBUS_TYPE_DOUBLE_ARRAY:
+ {
+ double *values;
+ int len;
+
+ if (!dbus_message_iter_get_double_array (iter, &values, &len))
+ return FALSE;
+
+ dbus_free (values);
+ }
+ break;
+ case DBUS_TYPE_STRING_ARRAY:
+ {
+ char **values;
+ int len;
+
+ if (!dbus_message_iter_get_string_array (iter, &values, &len))
+ return FALSE;
+
+ dbus_free_string_array (values);
+ }
+ break;
+
+ case DBUS_TYPE_DICT:
+ {
+ DBusDict *dict;
+
+ if (!dbus_message_iter_get_dict (iter, &dict))
+ return FALSE;
+ dbus_dict_unref (dict);
+ }
+ break;
+
+ default:
+ break;
+ }
+
+ if (!dbus_message_iter_next (iter))
+ break;
+ }
+
+ retval = TRUE;
+
+ failed:
+ if (iter)
+ dbus_message_iter_unref (iter);
+
+ return retval;
+}
+
+static dbus_bool_t
+check_have_valid_message (DBusMessageLoader *loader)
+{
+ DBusMessage *message;
+ dbus_bool_t retval;
+
+ message = NULL;
+ retval = FALSE;
+
+ if (!_dbus_message_loader_queue_messages (loader))
+ _dbus_assert_not_reached ("no memory to queue messages");
+
+ if (_dbus_message_loader_get_is_corrupted (loader))
+ {
+ _dbus_warn ("loader corrupted on message that was expected to be valid\n");
+ goto failed;
+ }
+
+ message = _dbus_message_loader_pop_message (loader);
+ if (message == NULL)
+ {
+ _dbus_warn ("didn't load message that was expected to be valid (message not popped)\n");
+ goto failed;
+ }
+
+ if (_dbus_string_get_length (&loader->data) > 0)
+ {
+ _dbus_warn ("had leftover bytes from expected-to-be-valid single message\n");
+ goto failed;
+ }
+
+ /* Verify that we're able to properly deal with the message.
+ * For example, this would detect improper handling of messages
+ * in nonstandard byte order.
+ */
+ if (!check_message_handling (message))
+ goto failed;
+
+ retval = TRUE;
+
+ failed:
+ if (message)
+ dbus_message_unref (message);
+
+ return retval;
+}
+
+static dbus_bool_t
+check_invalid_message (DBusMessageLoader *loader)
+{
+ dbus_bool_t retval;
+
+ retval = FALSE;
+
+ if (!_dbus_message_loader_queue_messages (loader))
+ _dbus_assert_not_reached ("no memory to queue messages");
+
+ if (!_dbus_message_loader_get_is_corrupted (loader))
+ {
+ _dbus_warn ("loader not corrupted on message that was expected to be invalid\n");
+ goto failed;
+ }
+
+ retval = TRUE;
+
+ failed:
+ return retval;
+}
+
+static dbus_bool_t
+check_incomplete_message (DBusMessageLoader *loader)
+{
+ DBusMessage *message;
+ dbus_bool_t retval;
+
+ message = NULL;
+ retval = FALSE;
+
+ if (!_dbus_message_loader_queue_messages (loader))
+ _dbus_assert_not_reached ("no memory to queue messages");
+
+ if (_dbus_message_loader_get_is_corrupted (loader))
+ {
+ _dbus_warn ("loader corrupted on message that was expected to be valid (but incomplete)\n");
+ goto failed;
+ }
+
+ message = _dbus_message_loader_pop_message (loader);
+ if (message != NULL)
+ {
+ _dbus_warn ("loaded message that was expected to be incomplete\n");
+ goto failed;
+ }
+
+ retval = TRUE;
+
+ failed:
+ if (message)
+ dbus_message_unref (message);
+ return retval;
+}
+
+static dbus_bool_t
+check_loader_results (DBusMessageLoader *loader,
+ DBusMessageValidity validity)
+{
+ if (!_dbus_message_loader_queue_messages (loader))
+ _dbus_assert_not_reached ("no memory to queue messages");
+
+ switch (validity)
+ {
+ case _DBUS_MESSAGE_VALID:
+ return check_have_valid_message (loader);
+ case _DBUS_MESSAGE_INVALID:
+ return check_invalid_message (loader);
+ case _DBUS_MESSAGE_INCOMPLETE:
+ return check_incomplete_message (loader);
+ case _DBUS_MESSAGE_UNKNOWN:
+ return TRUE;
+ }
+
+ _dbus_assert_not_reached ("bad DBusMessageValidity");
+ return FALSE;
+}
+
+
+/**
+ * Loads the message in the given message file.
+ *
+ * @param filename filename to load
+ * @param is_raw if #TRUE load as binary data, if #FALSE as message builder language
+ * @param data string to load message into
+ * @returns #TRUE if the message was loaded
+ */
+dbus_bool_t
+dbus_internal_do_not_use_load_message_file (const DBusString *filename,
+ dbus_bool_t is_raw,
+ DBusString *data)
+{
+ dbus_bool_t retval;
+
+ retval = FALSE;
+
+ if (is_raw)
+ {
+ DBusError error;
+
+ dbus_error_init (&error);
+ if (!_dbus_file_get_contents (data, filename, &error))
+ {
+ _dbus_warn ("Could not load message file %s: %s\n",
+ _dbus_string_get_const_data (filename),
+ error.message);
+ dbus_error_free (&error);
+ goto failed;
+ }
+ }
+ else
+ {
+ if (!_dbus_message_data_load (data, filename))
+ {
+ _dbus_warn ("Could not load message file %s\n",
+ _dbus_string_get_const_data (filename));
+ goto failed;
+ }
+ }
+
+ retval = TRUE;
+
+ failed:
+
+ return retval;
+}
+
+/**
+ * Tries loading the message in the given message file
+ * and verifies that DBusMessageLoader can handle it.
+ *
+ * @param filename filename to load
+ * @param is_raw if #TRUE load as binary data, if #FALSE as message builder language
+ * @param expected_validity what the message has to be like to return #TRUE
+ * @returns #TRUE if the message has the expected validity
+ */
+dbus_bool_t
+dbus_internal_do_not_use_try_message_file (const DBusString *filename,
+ dbus_bool_t is_raw,
+ DBusMessageValidity expected_validity)
+{
+ DBusString data;
+ dbus_bool_t retval;
+
+ retval = FALSE;
+
+ if (!_dbus_string_init (&data))
+ _dbus_assert_not_reached ("could not allocate string\n");
+
+ if (!dbus_internal_do_not_use_load_message_file (filename, is_raw,
+ &data))
+ goto failed;
+
+ retval = dbus_internal_do_not_use_try_message_data (&data, expected_validity);
+
+ failed:
+
+ if (!retval)
+ {
+ if (_dbus_string_get_length (&data) > 0)
+ _dbus_verbose_bytes_of_string (&data, 0,
+ _dbus_string_get_length (&data));
+
+ _dbus_warn ("Failed message loader test on %s\n",
+ _dbus_string_get_const_data (filename));
+ }
+
+ _dbus_string_free (&data);
+
+ return retval;
+}
+
+/**
+ * Tries loading the given message data.
+ *
+ *
+ * @param data the message data
+ * @param expected_validity what the message has to be like to return #TRUE
+ * @returns #TRUE if the message has the expected validity
+ */
+dbus_bool_t
+dbus_internal_do_not_use_try_message_data (const DBusString *data,
+ DBusMessageValidity expected_validity)
+{
+ DBusMessageLoader *loader;
+ dbus_bool_t retval;
+ int len;
+ int i;
+
+ loader = NULL;
+ retval = FALSE;
+
+ /* Write the data one byte at a time */
+
+ loader = _dbus_message_loader_new ();
+
+ len = _dbus_string_get_length (data);
+ for (i = 0; i < len; i++)
+ {
+ DBusString *buffer;
+
+ _dbus_message_loader_get_buffer (loader, &buffer);
+ _dbus_string_append_byte (buffer,
+ _dbus_string_get_byte (data, i));
+ _dbus_message_loader_return_buffer (loader, buffer, 1);
+ }
+
+ if (!check_loader_results (loader, expected_validity))
+ goto failed;
+
+ _dbus_message_loader_unref (loader);
+ loader = NULL;
+
+ /* Write the data all at once */
+
+ loader = _dbus_message_loader_new ();
+
+ {
+ DBusString *buffer;
+
+ _dbus_message_loader_get_buffer (loader, &buffer);
+ _dbus_string_copy (data, 0, buffer,
+ _dbus_string_get_length (buffer));
+ _dbus_message_loader_return_buffer (loader, buffer, 1);
+ }
+
+ if (!check_loader_results (loader, expected_validity))
+ goto failed;
+
+ _dbus_message_loader_unref (loader);
+ loader = NULL;
+
+ /* Write the data 2 bytes at a time */
+
+ loader = _dbus_message_loader_new ();
+
+ len = _dbus_string_get_length (data);
+ for (i = 0; i < len; i += 2)
+ {
+ DBusString *buffer;
+
+ _dbus_message_loader_get_buffer (loader, &buffer);
+ _dbus_string_append_byte (buffer,
+ _dbus_string_get_byte (data, i));
+ if ((i+1) < len)
+ _dbus_string_append_byte (buffer,
+ _dbus_string_get_byte (data, i+1));
+ _dbus_message_loader_return_buffer (loader, buffer, 1);
+ }
+
+ if (!check_loader_results (loader, expected_validity))
+ goto failed;
+
+ _dbus_message_loader_unref (loader);
+ loader = NULL;
+
+ retval = TRUE;
+
+ failed:
+
+ if (loader)
+ _dbus_message_loader_unref (loader);
+
+ return retval;
+}
+
+static dbus_bool_t
+process_test_subdir (const DBusString *test_base_dir,
+ const char *subdir,
+ DBusMessageValidity validity,
+ DBusForeachMessageFileFunc function,
+ void *user_data)
+{
+ DBusString test_directory;
+ DBusString filename;
+ DBusDirIter *dir;
+ dbus_bool_t retval;
+ DBusError error;
+
+ retval = FALSE;
+ dir = NULL;
+
+ if (!_dbus_string_init (&test_directory))
+ _dbus_assert_not_reached ("didn't allocate test_directory\n");
+
+ _dbus_string_init_const (&filename, subdir);
+
+ if (!_dbus_string_copy (test_base_dir, 0,
+ &test_directory, 0))
+ _dbus_assert_not_reached ("couldn't copy test_base_dir to test_directory");
+
+ if (!_dbus_concat_dir_and_file (&test_directory, &filename))
+ _dbus_assert_not_reached ("couldn't allocate full path");
+
+ _dbus_string_free (&filename);
+ if (!_dbus_string_init (&filename))
+ _dbus_assert_not_reached ("didn't allocate filename string\n");
+
+ dbus_error_init (&error);
+ dir = _dbus_directory_open (&test_directory, &error);
+ if (dir == NULL)
+ {
+ _dbus_warn ("Could not open %s: %s\n",
+ _dbus_string_get_const_data (&test_directory),
+ error.message);
+ dbus_error_free (&error);
+ goto failed;
+ }
+
+ printf ("Testing:\n");
+
+ next:
+ while (_dbus_directory_get_next_file (dir, &filename, &error))
+ {
+ DBusString full_path;
+ dbus_bool_t is_raw;
+
+ if (!_dbus_string_init (&full_path))
+ _dbus_assert_not_reached ("couldn't init string");
+
+ if (!_dbus_string_copy (&test_directory, 0, &full_path, 0))
+ _dbus_assert_not_reached ("couldn't copy dir to full_path");
+
+ if (!_dbus_concat_dir_and_file (&full_path, &filename))
+ _dbus_assert_not_reached ("couldn't concat file to dir");
+
+ if (_dbus_string_ends_with_c_str (&filename, ".message"))
+ is_raw = FALSE;
+ else if (_dbus_string_ends_with_c_str (&filename, ".message-raw"))
+ is_raw = TRUE;
+ else
+ {
+ _dbus_verbose ("Skipping non-.message file %s\n",
+ _dbus_string_get_const_data (&filename));
+ _dbus_string_free (&full_path);
+ goto next;
+ }
+
+ printf (" %s\n",
+ _dbus_string_get_const_data (&filename));
+
+ _dbus_verbose (" expecting %s\n",
+ validity == _DBUS_MESSAGE_VALID ? "valid" :
+ (validity == _DBUS_MESSAGE_INVALID ? "invalid" :
+ (validity == _DBUS_MESSAGE_INCOMPLETE ? "incomplete" : "unknown")));
+
+ if (! (*function) (&full_path, is_raw, validity, user_data))
+ {
+ _dbus_string_free (&full_path);
+ goto failed;
+ }
+ else
+ _dbus_string_free (&full_path);
+ }
+
+ if (dbus_error_is_set (&error))
+ {
+ _dbus_warn ("Could not get next file in %s: %s\n",
+ _dbus_string_get_const_data (&test_directory),
+ error.message);
+ dbus_error_free (&error);
+ goto failed;
+ }
+
+ retval = TRUE;
+
+ failed:
+
+ if (dir)
+ _dbus_directory_close (dir);
+ _dbus_string_free (&test_directory);
+ _dbus_string_free (&filename);
+
+ return retval;
+}
+
+/**
+ * Runs the given function on every message file in the test suite.
+ * The function should return #FALSE on test failure or fatal error.
+ *
+ * @param test_data_dir root dir of the test suite data files (top_srcdir/test/data)
+ * @param func the function to run
+ * @param user_data data for function
+ * @returns #FALSE if there's a failure
+ */
+dbus_bool_t
+dbus_internal_do_not_use_foreach_message_file (const char *test_data_dir,
+ DBusForeachMessageFileFunc func,
+ void *user_data)
+{
+ DBusString test_directory;
+ dbus_bool_t retval;
+
+ retval = FALSE;
+
+ _dbus_string_init_const (&test_directory, test_data_dir);
+
+ if (!process_test_subdir (&test_directory, "valid-messages",
+ _DBUS_MESSAGE_VALID, func, user_data))
+ goto failed;
+
+ if (!process_test_subdir (&test_directory, "invalid-messages",
+ _DBUS_MESSAGE_INVALID, func, user_data))
+ goto failed;
+
+ if (!process_test_subdir (&test_directory, "incomplete-messages",
+ _DBUS_MESSAGE_INCOMPLETE, func, user_data))
+ goto failed;
+
+ retval = TRUE;
+
+ failed:
+
+ _dbus_string_free (&test_directory);
+
+ return retval;
+}
+
+static void
+verify_test_message (DBusMessage *message)
+{
+ dbus_int32_t our_int;
+ char *our_str;
+ double our_double;
+ dbus_bool_t our_bool;
+
+ if (!dbus_message_get_args (message, NULL,
+ DBUS_TYPE_INT32, &our_int,
+ DBUS_TYPE_STRING, &our_str,
+ DBUS_TYPE_DOUBLE, &our_double,
+ DBUS_TYPE_BOOLEAN, &our_bool,
+ 0))
+ _dbus_assert_not_reached ("Could not get arguments");
+
+ if (our_int != -0x12345678)
+ _dbus_assert_not_reached ("integers differ!");
+
+ if (our_double != 3.14159)
+ _dbus_assert_not_reached ("doubles differ!");
+
+ if (strcmp (our_str, "Test string") != 0)
+ _dbus_assert_not_reached ("strings differ!");
+
+ if (!our_bool)
+ _dbus_assert_not_reached ("booleans differ");
+
+ dbus_free (our_str);
+}
+
+/**
+ * @ingroup DBusMessageInternals
+ * Unit test for DBusMessage.
+ *
+ * @returns #TRUE on success.
+ */
+dbus_bool_t
+_dbus_message_test (const char *test_data_dir)
+{
+ DBusMessage *message;
+ DBusMessageLoader *loader;
+ int i;
+ const char *data;
+ DBusMessage *copy;
+ const char *name1;
+ const char *name2;
+
+ /* Test the vararg functions */
+ message = dbus_message_new ("org.freedesktop.DBus.Test", "testMessage");
+ _dbus_message_set_serial (message, 1);
+ dbus_message_append_args (message,
+ DBUS_TYPE_INT32, -0x12345678,
+ DBUS_TYPE_STRING, "Test string",
+ DBUS_TYPE_DOUBLE, 3.14159,
+ DBUS_TYPE_BOOLEAN, TRUE,
+ 0);
+ _dbus_verbose_bytes_of_string (&message->header, 0,
+ _dbus_string_get_length (&message->header));
+ _dbus_verbose_bytes_of_string (&message->body, 0,
+ _dbus_string_get_length (&message->body));
+
+ verify_test_message (message);
+
+ copy = dbus_message_copy (message);
+
+ _dbus_assert (message->client_serial == copy->client_serial);
+ _dbus_assert (message->reply_serial == copy->reply_serial);
+ _dbus_assert (message->header_padding == copy->header_padding);
+
+ _dbus_assert (_dbus_string_get_length (&message->header) ==
+ _dbus_string_get_length (©->header));
+
+ _dbus_assert (_dbus_string_get_length (&message->body) ==
+ _dbus_string_get_length (©->body));
+
+ verify_test_message (copy);
+
+ name1 = dbus_message_get_name (message);
+ name2 = dbus_message_get_name (copy);
+
+ _dbus_assert (strcmp (name1, name2) == 0);
+
+ dbus_message_unref (message);
+ dbus_message_unref (copy);
+
+ message = dbus_message_new ("org.freedesktop.DBus.Test", "testMessage");
+ _dbus_message_set_serial (message, 1);
+ dbus_message_set_reply_serial (message, 0x12345678);
+
+ dbus_message_append_string (message, "Test string");
+ dbus_message_append_int32 (message, -0x12345678);
+ dbus_message_append_uint32 (message, 0xedd1e);
+ dbus_message_append_double (message, 3.14159);
+
+ message_iter_test (message);
+
+ /* Message loader test */
+ _dbus_message_lock (message);
+ loader = _dbus_message_loader_new ();
+
+ /* Write the header data one byte at a time */
+ data = _dbus_string_get_const_data (&message->header);
+ for (i = 0; i < _dbus_string_get_length (&message->header); i++)
+ {
+ DBusString *buffer;
+
+ _dbus_message_loader_get_buffer (loader, &buffer);
+ _dbus_string_append_byte (buffer, data[i]);
+ _dbus_message_loader_return_buffer (loader, buffer, 1);
+ }
+
+ /* Write the body data one byte at a time */
+ data = _dbus_string_get_const_data (&message->body);
+ for (i = 0; i < _dbus_string_get_length (&message->body); i++)
+ {
+ DBusString *buffer;
+
+ _dbus_message_loader_get_buffer (loader, &buffer);
+ _dbus_string_append_byte (buffer, data[i]);
+ _dbus_message_loader_return_buffer (loader, buffer, 1);
+ }
+
+ dbus_message_unref (message);
+
+ /* Now pop back the message */
+ if (!_dbus_message_loader_queue_messages (loader))
+ _dbus_assert_not_reached ("no memory to queue messages");
+
+ if (_dbus_message_loader_get_is_corrupted (loader))
+ _dbus_assert_not_reached ("message loader corrupted");
+
+ message = _dbus_message_loader_pop_message (loader);
+ if (!message)
+ _dbus_assert_not_reached ("received a NULL message");
+
+ if (dbus_message_get_reply_serial (message) != 0x12345678)
+ _dbus_assert_not_reached ("reply serial fields differ");
+
+ message_iter_test (message);
+
+ dbus_message_unref (message);
+ _dbus_message_loader_unref (loader);
+
+ /* Now load every message in test_data_dir if we have one */
+ if (test_data_dir == NULL)
+ return TRUE;
+
+ return dbus_internal_do_not_use_foreach_message_file (test_data_dir,
+ (DBusForeachMessageFileFunc)
+ dbus_internal_do_not_use_try_message_file,
+ NULL);
+}
+
+#endif /* DBUS_BUILD_TESTS */
projects / platform / upstream / dbus.git / blobdiff