Limit test page resolution from 1 to 9600dpi (Issue #1541)

Author: michaelrsweet

CHANGES.md

@@ -4,6 +4,8 @@ Changes in libcups
 v3.0.2 - YYYY-MM-DD
 -------------------
 
+- Updated `ipptool` to limit the range of supported raster resolutions for the
+  generated test page content from 1 to 9600dpi.
 - Fixed a recursion issue with encoding of nested collections.
 
 

tools/ipptool.c

@@ -3294,7 +3294,7 @@ parse_generate_file(
           }
 	}
 
-	if (!params->xdpi || !params->ydpi)
+	if (params->xdpi <= 0 || params->xdpi > 9600 || params->ydpi <= 0 || params->ydpi > 9600)
 	{
 	  print_fatal_error(data, "Printer does not report a supported RESOLUTION on line %d of '%s'.", ippFileGetLineNumber(f), ippFileGetFilename(f));
 	  goto fail;
@@ -3608,7 +3608,7 @@ parse_generate_file(
 	  params->xdpi = params->ydpi = 0;
       }
 
-      if (strcmp(value, "default") && (params->xdpi <= 0 || params->ydpi <= 0))
+      if (strcmp(value, "default") && (params->xdpi <= 0 || params->xdpi > 9600 || params->ydpi <= 0 || params->ydpi > 9600))
       {
 	print_fatal_error(data, "Bad RESOLUTION \"%s\" on line %d of '%s'.", value, ippFileGetLineNumber(f), ippFileGetFilename(f));
 	goto fail;