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GUACAMOLE-249: Remove RAIL callback typecasts, relying instead on configure tests to check need for const.

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This commit is contained in:
Michael Jumper 2020-01-13 16:32:38 -08:00
parent e5fdda1286
commit 3dfd2467c3
2 changed files with 48 additions and 4 deletions
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30
configure.ac
View File

@ -627,6 +627,36 @@ then
fi
# RAIL callback variants
if test "x${have_freerdp2}" = "xyes"
then
# FreeRDP 2.0.0-rc3 and older did not use const for RAIL callbacks
AC_MSG_CHECKING([whether RAIL callbacks require const for their final parameter])
AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
#include <freerdp/client/rail.h>
#include <winpr/wtypes.h>
UINT test_server_handshake(RailClientContext* rail,
const RAIL_HANDSHAKE_ORDER* handshake);
RailClientContext context = {
.ServerHandshake = test_server_handshake
};
int main() {
return (int) context.ServerHandshake(NULL, NULL);
}
]])],
[AC_MSG_RESULT([yes])]
[AC_DEFINE([FREERDP_RAIL_CALLBACKS_REQUIRE_CONST],,
[Whether RAIL callbacks require const for the final parameter])],
[AC_MSG_RESULT([no])])
fi
AM_CONDITIONAL([ENABLE_RDP], [test "x${have_freerdp2}" = "xyes"])
#

22
src/protocols/rdp/channels/rail.c
View File

@ -33,6 +33,20 @@
#include <stddef.h>
#include <string.h>
#ifdef FREERDP_RAIL_CALLBACKS_REQUIRE_CONST
/**
* FreeRDP 2.0.0-rc4 and newer requires the final argument for all RAIL
* callbacks to be const.
*/
#define RAIL_CONST const
#else
/**
* FreeRDP 2.0.0-rc3 and older requires the final argument for all RAIL
* callbacks to NOT be const.
*/
#define RAIL_CONST
#endif
/**
* Completes initialization of the RemoteApp session, sending client system
* parameters and executing the desired RemoteApp command using the Client
@ -102,7 +116,7 @@ static UINT guac_rdp_rail_complete_handshake(RailClientContext* rail) {
* (non-zero) otherwise.
*/
static UINT guac_rdp_rail_handshake(RailClientContext* rail,
const RAIL_HANDSHAKE_ORDER* handshake) {
RAIL_CONST RAIL_HANDSHAKE_ORDER* handshake) {
return guac_rdp_rail_complete_handshake(rail);
}
@ -126,7 +140,7 @@ static UINT guac_rdp_rail_handshake(RailClientContext* rail,
* (non-zero) otherwise.
*/
static UINT guac_rdp_rail_handshake_ex(RailClientContext* rail,
const RAIL_HANDSHAKE_EX_ORDER* handshake_ex) {
RAIL_CONST RAIL_HANDSHAKE_EX_ORDER* handshake_ex) {
return guac_rdp_rail_complete_handshake(rail);
}
@ -164,8 +178,8 @@ static void guac_rdp_rail_channel_connected(rdpContext* context,
/* Init FreeRDP RAIL context, ensuring the guac_client can be accessed from
* within any RAIL-specific callbacks */
rail->custom = client;
rail->ServerHandshake = (pcRailServerHandshake) guac_rdp_rail_handshake;
rail->ServerHandshakeEx = (pcRailServerHandshakeEx) guac_rdp_rail_handshake_ex;
rail->ServerHandshake = guac_rdp_rail_handshake;
rail->ServerHandshakeEx = guac_rdp_rail_handshake_ex;
guac_client_log(client, GUAC_LOG_DEBUG, "RAIL (RemoteApp) channel "
"connected.");