nxagent: Fix an excessive request size limitation that broke big-requests.

Fixes ArcticaProject/nx-libs#301, #631 Backport from xorg-xserver: commit ca82d4bddf235c9b68d51d68636bab40eafb9889 Author: Eric Anholt <eric@anholt.net> Date: Fri Aug 31 13:00:23 2007 -0700 Bug #7186: Fix an excessive request size limitation that broke big-requests. MAXBUFSIZE appears to be a leftover of some previous time. Instead, just use maxBigRequestSize when bigreqs are available (limiting buffers to ~16MB). When bigreqs are not available, needed won't be larger than the maximum size of a non-bigreqs request (256kB).

nxagent: Fix an excessive request size limitation that broke big-requests.
da9d1a52 · Ulrich Sibiller · d3bbca71 · da9d1a52
Commit da9d1a52 authored Oct 06, 2018 by Ulrich Sibiller
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io.c nx-X11/programs/Xserver/os/io.c +3 -1

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--- a/nx-X11/programs/Xserver/os/io.c
+++ b/nx-X11/programs/Xserver/os/io.c
@@ -301,7 +301,8 @@ ReadRequestFromClient(ClientPtr client)
 	 */

 	oci->lenLastReq = 0;
-	if (needed > MAXBUFSIZE)
+#ifdef BIGREQS
+	if (needed > maxBigRequestSize << 2)
 	{
 	    /* request is too big for us to handle */
 	    /*
@@ -312,6 +313,7 @@ ReadRequestFromClient(ClientPtr client)
 	    oci->lenLastReq = gotnow;
 	    return needed;
 	}
+#endif
 	if ((gotnow == 0) ||
 	    ((oci->bufptr - oci->buffer + needed) > oci->size))
 	{