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-rw-r--r--nx-X11/programs/Xserver/hw/nxagent/Args.c76
-rw-r--r--nx-X11/programs/Xserver/hw/nxagent/Display.c323
-rw-r--r--nx-X11/programs/Xserver/hw/nxagent/Options.c2
-rw-r--r--nx-X11/programs/Xserver/hw/nxagent/Options.h17
4 files changed, 368 insertions, 50 deletions
diff --git a/nx-X11/programs/Xserver/hw/nxagent/Args.c b/nx-X11/programs/Xserver/hw/nxagent/Args.c
index 832595786..9e54c0073 100644
--- a/nx-X11/programs/Xserver/hw/nxagent/Args.c
+++ b/nx-X11/programs/Xserver/hw/nxagent/Args.c
@@ -1405,6 +1405,82 @@ static void nxagentParseOptions(char *name, char *value)
return;
}
+ else if (!strcmp(name, "tolerancechecks"))
+ {
+ if (strcmp(value, "strict") == 0)
+ {
+ nxagentChangeOption(ReconnectTolerance, ToleranceChecksStrict);
+ }
+ else if (strcmp(value, "safe") == 0)
+ {
+ nxagentChangeOption(ReconnectTolerance, ToleranceChecksSafe);
+ }
+ else if (strcmp(value, "risky") == 0)
+ {
+ nxagentChangeOption(ReconnectTolerance, ToleranceChecksRisky);
+ }
+ else if (strcmp(value, "none") == 0)
+ {
+ nxagentChangeOption(ReconnectTolerance, ToleranceChecksBypass);
+ }
+ else
+ {
+ /*
+ * Check for a matching integer. Or any integer, really.
+ */
+ long tolerance_parse = 0;
+
+ errno = 0;
+ tolerance_parse = strtol(value, NULL, 10);
+
+ if ((errno) && (0 == tolerance_parse))
+ {
+ fprintf(stderr, "nxagentParseOptions: Unable to convert value [%s] of option [%s]. "
+ "Ignoring option.\n",
+ validateString(value), validateString(name));
+
+ return;
+ }
+
+ if ((long) UINT_MAX < tolerance_parse)
+ {
+ tolerance_parse = UINT_MAX;
+
+ fprintf(stderr, "nxagentParseOptions: Warning: value [%s] of option [%s] "
+ "out of range, clamped to [%u].\n",
+ validateString(value), validateString(name), tolerance_parse);
+ }
+
+ if (0 > tolerance_parse)
+ {
+ tolerance_parse = 0;
+
+ fprintf(stderr, "nxagentParseOptions: Warning: value [%s] of option [%s] "
+ "out of range, clamped to [%u].\n",
+ validateString(value), validateString(name), tolerance_parse);
+ }
+
+ #ifdef TEST
+ switch (tolerance_parse) {
+ case ToleranceChecksStrict:
+ case ToleranceChecksSafe:
+ case ToleranceChecksRisky:
+ case ToleranceChecksBypass:
+ break;
+ default:
+ fprintf(stderr, "nxagentParseOptions: Warning: value [%s] of "
+ "option [%s] unknown, will be mapped to "
+ "\"Bypass\" [%u] value internally.\n",
+ validateString(value), validateString(name),
+ (unsigned int)ToleranceChecksBypass);
+ }
+ #endif
+
+ nxagentChangeOption(ReconnectTolerance, tolerance_parse);
+ }
+
+ return;
+ }
else
{
#ifdef DEBUG
diff --git a/nx-X11/programs/Xserver/hw/nxagent/Display.c b/nx-X11/programs/Xserver/hw/nxagent/Display.c
index 5943fbf77..5d258fd44 100644
--- a/nx-X11/programs/Xserver/hw/nxagent/Display.c
+++ b/nx-X11/programs/Xserver/hw/nxagent/Display.c
@@ -45,6 +45,7 @@ is" without express or implied warranty.
#include <unistd.h>
#include <time.h>
#include <errno.h>
+#include <stdbool.h>
#include <nx-X11/X.h>
#include <nx-X11/Xproto.h>
@@ -178,7 +179,7 @@ static void nxagentInitDepths(void);
static void nxagentInitPixmapFormats(void);
static int nxagentCheckForDefaultDepthCompatibility(void);
-static int nxagentCheckForDepthsCompatibility(int flexibility);
+static int nxagentCheckForDepthsCompatibility(void);
static int nxagentCheckForPixmapFormatsCompatibility(void);
static int nxagentInitAndCheckVisuals(int flexibility);
static int nxagentCheckForColormapsCompatibility(int flexibility);
@@ -1346,6 +1347,7 @@ FIXME: Use of nxagentParentWindow is strongly deprecated.
nxagentInitDepths();
nxagentInitPixmapFormats();
+ (void) nxagentCheckForPixmapFormatsCompatibility();
/*
* Create a pixmap for each depth matching the
@@ -1726,8 +1728,6 @@ XXX: Some X server doesn't list 1 among available depths...
}
}
#endif
-
- nxagentCheckForPixmapFormatsCompatibility();
}
void nxagentSetDefaultDrawables()
@@ -2175,10 +2175,40 @@ void nxagentDisconnectDisplay(void)
static int nxagentCheckForDefaultDepthCompatibility()
{
+ /*
+ * Depending on the (reconnect) tolerance checks value, this
+ * function checks stricter or looser:
+ * - Strict means that the old and new default depth values
+ * must match exactly.
+ * - Safe or Risky means that the default depth values might differ,
+ * but the new default depth value must be at least as
+ * high as the former default depth value. This is
+ * recommended, because it allows clients with a
+ * higher default depth value to still connect, but
+ * not lose functionality.
+ * - Bypass or higher means that all of these checks are
+ * essentially deactivated. This is probably a very
+ * bad idea.
+ */
+
int dDepth;
dDepth = DefaultDepth(nxagentDisplay, DefaultScreen(nxagentDisplay));
+ const unsigned int tolerance = nxagentOption(ReconnectTolerance);
+
+ if (ToleranceChecksBypass <= tolerance)
+ {
+ #ifdef WARNING
+ fprintf(stderr, "nxagentCheckForDefaultDepthCompatibility: WARNING! Not proceeding with any checks, "
+ "because tolerance [%u] higher than or equal [%u]. New default depth value "
+ "is [%d], former default depth value is [%d].\n", tolerance,
+ ToleranceChecksBypass, dDepth, nxagentDefaultDepthRecBackup);
+ #endif
+
+ return 1;
+ }
+
if (nxagentDefaultDepthRecBackup == dDepth)
{
#ifdef TEST
@@ -2188,142 +2218,326 @@ static int nxagentCheckForDefaultDepthCompatibility()
return 1;
}
+ else if ((ToleranceChecksSafe <= tolerance) && (nxagentDefaultDepthRecBackup < dDepth))
+ {
+ #ifdef WARNING
+ fprintf(stderr, "nxagentCheckForDefaultDepthCompatibility: WARNING! New default depth [%d] "
+ "higher than the old default depth [%d] at tolerance [%u].\n", dDepth,
+ nxagentDefaultDepthRecBackup, tolerance);
+ #endif
+
+ return 1;
+ }
else
{
#ifdef WARNING
fprintf(stderr, "nxagentCheckForDefaultDepthCompatibility: WARNING! New default depth [%d] "
- "doesn't match with old default depth [%d].\n", dDepth, nxagentDefaultDepthRecBackup);
+ "doesn't match with old default depth [%d] at tolerance [%u].\n", dDepth,
+ nxagentDefaultDepthRecBackup, tolerance);
#endif
return 0;
}
}
-static int nxagentCheckForDepthsCompatibility(int flexibility)
+static int nxagentCheckForDepthsCompatibility()
{
- int i, j;
- int matched;
- int compatible;
+ /*
+ * Depending on the (reconnect) tolerance checks value, this
+ * function checks stricter or looser:
+ * - Strict means that the number of old and new depths must
+ * match exactly and every old depth value must be
+ * available in the new depth array.
+ * - Safe means that the number of depths might diverge,
+ * but all former depth must also be included in the
+ * new depth array. This is recommended, because
+ * it allows clients with more depths to still
+ * connect, but not lose functionality.
+ * - Risky means that the new depths array is allowed to be
+ * smaller than the old depths array, but at least
+ * one depth value must be included in both.
+ * This is potentially unsafe.
+ * - Bypass or higher means that all of these checks are
+ * essentially deactivated. This is a very bad idea.
+ */
- if (nxagentNumDepths != nxagentNumDepthsRecBackup)
+ const unsigned int tolerance = nxagentOption(ReconnectTolerance);
+
+ if (ToleranceChecksBypass <= tolerance)
{
#ifdef WARNING
- fprintf(stderr, "nxagentCheckForDepthsCompatibility: WARNING! Number of new available depths [%d] "
- "doesn't match with old depths [%d].\n", nxagentNumDepths,
- nxagentNumDepthsRecBackup);
+ fprintf(stderr, "nxagentCheckForDepthsCompatibility: WARNING! Not proceeding with any checks, "
+ "because tolerance [%u] higher than or equal [%u]. Number of newly available depths "
+ "is [%d], number of old depths is [%d].\n", tolerance, ToleranceChecksBypass,
+ nxagentNumDepths, nxagentNumDepthsRecBackup);
+ #endif
+
+ return 1;
+ }
+
+ if ((ToleranceChecksStrict == tolerance) && (nxagentNumDepths != nxagentNumDepthsRecBackup))
+ {
+ #ifdef WARNING
+ fprintf(stderr, "nxagentCheckForDepthsCompatibility: WARNING! No tolerance allowed and "
+ "number of new available depths [%d] doesn't match with number of old "
+ "depths [%d].\n", nxagentNumDepths,
+ nxagentNumDepthsRecBackup);
#endif
return 0;
}
- compatible = 1;
+ if ((ToleranceChecksSafe == tolerance) && (nxagentNumDepths < nxagentNumDepthsRecBackup))
+ {
+ #ifdef WARNING
+ fprintf(stderr, "nxagentCheckForDepthsCompatibility: WARNING! Tolerance [%u] not "
+ "high enough and number of new available depths [%d] "
+ "lower than number of old depths [%d].\n", tolerance,
+ nxagentNumDepths, nxagentNumDepthsRecBackup);
+ #endif
+
+ return 0;
+ }
+
+ /*
+ * By now the tolerance is either:
+ * - Strict and both depth numbers match
+ * - Safe and:
+ * o the number of old and new depths matches exactly, or
+ * o the number of old depths is lower than the number
+ * of new depths
+ * - Risky
+ */
+
+ bool compatible = true;
+ bool one_match = false;
+ bool matched = false;
+ int total_matches = 0;
- for (i = 0; i < nxagentNumDepths; i++)
+ /*
+ * FIXME: within this loop, we try to match all "new" depths
+ * against the "old" depths. Depending upon the flexibility
+ * value, either all "new" depths must have a corresponding
+ * counterpart in the "old" array, or at least one value
+ * must be included in both.
+ * Is this safe enough though?
+ * Shouldn't we better try to match entries in the "old"
+ * depths array against the "new" depths array, such that
+ * we know that all "old" values are covered by "new"
+ * values? Or is it more important that "new" values are
+ * covered by "old" ones, with potentially more "old"
+ * values lingering around that cannot be displayed by the
+ * connected client?
+ *
+ * This section probably needs a revisit at some point in time.
+ */
+ for (int i = 0; i < nxagentNumDepths; ++i)
{
- matched = 0;
+ matched = false;
- for (j = 0; j < nxagentNumDepthsRecBackup; j++)
+ for (int j = 0; j < nxagentNumDepthsRecBackup; ++j)
{
if (nxagentDepths[i] == nxagentDepthsRecBackup[j])
{
- matched = 1;
+ matched = true;
+ one_match = true;
+ ++total_matches;
break;
}
}
- if (matched == 0)
+ if ((ToleranceChecksRisky > tolerance) && (!matched))
{
#ifdef WARNING
- fprintf(stderr, "nxagentCheckForDepthsCompatibility: WARNING! Failed to match available depth [%d].\n",
- nxagentDepths[i]);
+ fprintf(stderr, "nxagentCheckForDepthsCompatibility: WARNING! Tolerance [%u] too low and "
+ "failed to match available depth [%d].\n", tolerance, nxagentDepths[i]);
#endif
- compatible = 0;
+ compatible = false;
break;
}
}
+ /*
+ * At Risky tolerance, only one match is necessary to be "compatible".
+ */
+ if (ToleranceChecksRisky == tolerance)
+ {
+ compatible = one_match;
+ }
+
+ int ret = (!(!compatible));
- if (compatible == 1)
+ if (compatible)
{
#ifdef TEST
fprintf(stderr, "nxagentCheckForDepthsCompatibility: Internal depths match with "
- "remote depths.\n");
+ "remote depths at tolerance [%u].\n", tolerance);
#endif
+
+ if (total_matches != nxagentNumDepths)
+ {
+ #ifdef WARNING
+ fprintf(stderr, "nxagentCheckForDepthsCompatibility: only some [%d] of the new depths [%d] "
+ "match with old depths [%d] at tolerance [%u].\n", total_matches, nxagentNumDepths,
+ nxagentNumDepthsRecBackup, tolerance);
+ #endif
+ }
}
else
{
#ifdef WARNING
- fprintf(stderr, "nxagentCheckForDepthsCompatibility: WARNING! New available depths don't match with "
- "old depths.\n");
+ fprintf(stderr, "nxagentCheckForDepthsCompatibility: WARNING! New available depths [%d] don't match "
+ "with old depths [%d] at tolerance [%u]. Only [%d] depth values matched.\n",
+ nxagentNumDepths, nxagentNumDepthsRecBackup, tolerance, total_matches);
#endif
}
- return compatible;
+ return (ret);
}
static int nxagentCheckForPixmapFormatsCompatibility()
{
- int i, j;
- int matched;
- int compatible;
+ /*
+ * Depending on the (reconnect) tolerance checks value, this
+ * function checks stricter or looser:
+ * - Strict means that the number of internal and external
+ * pixmap formats must match exactly and every
+ * internal pixmap format must be available in the
+ * external pixmap format array.
+ * - Safe means that the number of pixmap formats might
+ * diverge, but all internal pixmap formats must
+ * also be included in the external pixmap formats
+ * array. This is recommended, because it allows
+ * clients with more pixmap formats to still connect,
+ * but not lose functionality.
+ * - Risky means that the internal pixmap formats array is
+ * allowed to be smaller than the external pixmap
+ * formats array, but at least one pixmap format must
+ * be included in both. This is potentially unsafe.
+ * - Bypass or higher means that all of these checks are
+ * essentially deactivated. This is a very bad idea.
+ */
- compatible = 1;
+ const unsigned int tolerance = nxagentOption(ReconnectTolerance);
+
+ if (ToleranceChecksBypass <= tolerance)
+ {
+ #ifdef WARNING
+ fprintf(stderr, "nxagentCheckForPixmapFormatsCompatibility: WARNING! Not proceeding with any checks, "
+ "because tolerance [%u] higher than or equal [%u]. Number of internally available "
+ "pixmap formats is [%d], number of externally available pixmap formats is [%d].\n",
+ tolerance, ToleranceChecksBypass, nxagentNumPixmapFormats, nxagentRemoteNumPixmapFormats);
+ #endif
- if (nxagentNumPixmapFormats != nxagentRemoteNumPixmapFormats)
+ return 1;
+ }
+
+ if ((ToleranceChecksStrict == tolerance) && (nxagentNumPixmapFormats != nxagentRemoteNumPixmapFormats))
{
#ifdef DEBUG
- fprintf(stderr, "nxagentCheckForPixmapFormatsCompatibility: WARNING! Number of internal pixmap formats [%d] "
- "doesn't match with remote formats [%d].\n", nxagentNumPixmapFormats,
- nxagentRemoteNumPixmapFormats);
+ fprintf(stderr, "nxagentCheckForPixmapFormatsCompatibility: WARNING! No tolerance allowed and number "
+ "of internal pixmap formats [%d] doesn't match with number of remote formats [%d].\n",
+ nxagentNumPixmapFormats, nxagentRemoteNumPixmapFormats);
#endif
+
+ return 0;
}
- for (i = 0; i < nxagentNumPixmapFormats; i++)
+ if ((ToleranceChecksSafe == tolerance) && (nxagentNumPixmapFormats > nxagentRemoteNumPixmapFormats))
{
- matched = 0;
+ #ifdef DEBUG
+ fprintf(stderr, "nxagentCheckForPixmapFormatsCompatibility: WARNING! Tolerance [%u] too low "
+ "and number of internal pixmap formats [%d] higher than number of external formats [%d].\n",
+ tolerance, nxagentNumPixmapFormats, nxagentRemoteNumPixmapFormats);
+ #endif
+
+ return 0;
+ }
+
+ /*
+ * By now the tolerance is either:
+ * - Strict
+ * - Safe and:
+ * o the number of internal and external pixmap formats
+ * matches exactly, or
+ * o the number of external pixmap formats is higher than
+ * the number of internal pixmap formats,
+ * - Risky
+ */
+
+ bool compatible = true;
+ bool one_match = false;
+ bool matched = false;
+ int total_matches = 0;
+
+ for (int i = 0; i < nxagentNumPixmapFormats; ++i)
+ {
+ matched = false;
- for (j = 0; j < nxagentRemoteNumPixmapFormats; j++)
+ for (int j = 0; j < nxagentRemoteNumPixmapFormats; ++j)
{
if (nxagentPixmapFormats[i].depth == nxagentRemotePixmapFormats[j].depth &&
nxagentPixmapFormats[i].bits_per_pixel == nxagentRemotePixmapFormats[j].bits_per_pixel &&
nxagentPixmapFormats[i].scanline_pad == nxagentRemotePixmapFormats[j].scanline_pad)
{
- matched = 1;
+ matched = true;
+ one_match = true;
+ ++total_matches;
break;
}
}
- if (matched == 0)
+ if ((ToleranceChecksRisky > tolerance) && (!matched))
{
#ifdef WARNING
- fprintf(stderr, "nxagentCheckForPixmapFormatsCompatibility: WARNING! Failed to match internal "
- "pixmap format depth [%d] bpp [%d] pad [%d].\n", nxagentPixmapFormats[i].depth,
- nxagentPixmapFormats[i].bits_per_pixel, nxagentPixmapFormats[i].scanline_pad);
+ fprintf(stderr, "nxagentCheckForPixmapFormatsCompatibility: WARNING! Tolerance [%u] too low "
+ "and failed to match internal pixmap format (depth [%d] bpp [%d] pad [%d]).\n",
+ tolerance, nxagentPixmapFormats[i].depth, nxagentPixmapFormats[i].bits_per_pixel,
+ nxagentPixmapFormats[i].scanline_pad);
#endif
- compatible = 0;
+ compatible = false;
}
}
- #ifdef TEST
+ int ret = !(!(compatible));
- if (compatible == 1)
+ if (compatible)
{
+ #ifdef TEST
fprintf(stderr, "nxagentCheckForPixmapFormatsCompatibility: Internal pixmap formats match with "
- "remote pixmap formats.\n");
- }
+ "remote pixmap formats at tolerance [%u].\n", tolerance);
+ #endif
- #endif
+ if (total_matches != nxagentNumPixmapFormats)
+ {
+ #ifdef WARNING
+ fprintf(stderr, "nxagentCheckForPixmapFormatsCompatibility: Only some [%d] of the internal "
+ "pixmap formats [%d] match with external pixmap formats [%d] at tolerance [%u].\n",
+ total_matches, nxagentNumPixmapFormats, nxagentRemoteNumPixmapFormats, tolerance);
+ #endif
+ }
+ }
+ else
+ {
+ #ifdef WARNING
+ fprintf(stderr, "nxagentCheckForPixmapFormatsCompatibility: WARNING! Internally available "
+ "pixmap formats [%d] don't match with external pixmap formats [%d] "
+ "at tolerance [%u]. Only [%d] depth values matched.\n",
+ nxagentNumPixmapFormats, nxagentRemoteNumPixmapFormats, tolerance, total_matches);
+ #endif
+ }
- return compatible;
+ return (ret);
}
static int nxagentInitAndCheckVisuals(int flexibility)
{
+ /* FIXME: does this also need work? */
XVisualInfo viTemplate;
XVisualInfo *viList;
XVisualInfo *newVisuals;
@@ -2433,6 +2647,7 @@ FIXME: Should the visual be ignored in this case?
static int nxagentCheckForColormapsCompatibility(int flexibility)
{
+ /* FIXME: does this also need work? */
if (nxagentNumDefaultColormaps == nxagentNumDefaultColormapsRecBackup)
{
#ifdef TEST
@@ -2592,7 +2807,7 @@ Bool nxagentReconnectDisplay(void *p0)
reconnectDisplayState = GOT_DEPTH_LIST;
- if (nxagentCheckForDepthsCompatibility(flexibility) == 0)
+ if (nxagentCheckForDepthsCompatibility() == 0)
{
nxagentSetReconnectError(FAILED_RESUME_DEPTHS_ALERT,
"Couldn't restore all the required depths.");
@@ -2626,6 +2841,14 @@ Bool nxagentReconnectDisplay(void *p0)
nxagentInitPixmapFormats();
+ if (nxagentCheckForPixmapFormatsCompatibility() == 0)
+ {
+ nxagentSetReconnectError(FAILED_RESUME_PIXMAPS_ALERT,
+ "Couldn't restore all the required pixmap formats.");
+
+ return False;
+ }
+
reconnectDisplayState = GOT_PIXMAP_FORMAT_LIST;
/*
diff --git a/nx-X11/programs/Xserver/hw/nxagent/Options.c b/nx-X11/programs/Xserver/hw/nxagent/Options.c
index 0a894f9a4..978f3ab95 100644
--- a/nx-X11/programs/Xserver/hw/nxagent/Options.c
+++ b/nx-X11/programs/Xserver/hw/nxagent/Options.c
@@ -166,6 +166,8 @@ void nxagentInitOptions()
nxagentOptions.Xinerama = 1;
nxagentOptions.SleepTime = DEFAULT_SLEEP_TIME;
+
+ nxagentOptions.ReconnectTolerance = DEFAULT_TOLERANCE;
}
/*
diff --git a/nx-X11/programs/Xserver/hw/nxagent/Options.h b/nx-X11/programs/Xserver/hw/nxagent/Options.h
index df6f8b65b..20616a90b 100644
--- a/nx-X11/programs/Xserver/hw/nxagent/Options.h
+++ b/nx-X11/programs/Xserver/hw/nxagent/Options.h
@@ -67,6 +67,17 @@ typedef enum _ClientOsType
} ClientOsType;
+typedef enum _ToleranceChecksMode
+{
+ ToleranceChecksStrict = 0,
+ ToleranceChecksSafe = 1,
+ ToleranceChecksRisky = 2,
+ ToleranceChecksBypass = 3
+} ToleranceChecksMode;
+
+
+#define DEFAULT_TOLERANCE ToleranceChecksStrict
+
/*
* Set of options affecting agent operations.
*/
@@ -414,6 +425,12 @@ typedef struct _AgentOptions
unsigned int SleepTime;
+ /*
+ * Tolerance - tightens or loosens reconnect checks.
+ */
+
+ ToleranceChecksMode ReconnectTolerance;
+
} AgentOptionsRec;
typedef AgentOptionsRec *AgentOptionsPtr;