add large cursor support, posix shm

common/ms-rdpbcgr.h

@@ -567,4 +567,8 @@
 #define RDP_MPPC_FLUSH                 0x80
 #define RDP_MPPC_DICT_SIZE             8192 /* RDP 4.0 | MS-RDPBCGR 3.1.8 */
 
+/* largePointerSupprtFlags (2.2.7.2.7) */
+#define LARGE_POINTER_FLAG_96x96   0x00000001
+#define LARGE_POINTER_FLAG_384x384 0x00000002
+
 #endif /* MS_RDPBCGR_H */

common/os_calls.c

@@ -56,6 +56,7 @@
 #if defined(HAVE_SYS_PRCTL_H)
 #include <sys/prctl.h>
 #endif
+#include <sys/mman.h>
 #include <dlfcn.h>
 #include <arpa/inet.h>
 #include <netdb.h>
@@ -2353,6 +2354,37 @@ nomem:
     return NULL;
 }
 
+/*****************************************************************************/
+int
+g_file_map(int fd, int aread, int awrite, size_t length, void **addr)
+{
+    int prot = 0;
+    void *laddr;
+
+    if (aread)
+    {
+        prot |= PROT_READ;
+    }
+    if (awrite)
+    {
+        prot |= PROT_WRITE;
+    }
+    laddr = mmap(NULL, length, prot, MAP_SHARED, fd, 0);
+    if (laddr == MAP_FAILED)
+    {
+        return 1;
+    }
+    *addr = laddr;
+    return 0;
+}
+
+/*****************************************************************************/
+int
+g_munmap(void *addr, size_t length)
+{
+    return munmap(addr, length);
+}
+
 /*****************************************************************************/
 /* Converts a hex mask to a mode_t value */
 #if !defined(_WIN32)

common/os_calls.h

@@ -221,6 +221,10 @@ int      g_file_read(int fd, char *ptr, int len);
 int      g_file_write(int fd, const char *ptr, int len);
 int      g_file_seek(int fd, int offset);
 int      g_file_lock(int fd, int start, int len);
+int
+g_file_map(int fd, int aread, int awrite, size_t length, void **addr);
+int
+g_munmap(void *addr, size_t length);
 int      g_file_duplicate_on(int fd, int target_fd);
 int      g_file_get_cloexec(int fd);
 int      g_file_set_cloexec(int fd, int status);

common/xrdp_client_info.h

@@ -213,9 +213,12 @@ struct xrdp_client_info
      * data */
     unsigned int session_physical_width; /* in mm */
     unsigned int session_physical_height; /* in mm */
+
+    int large_pointer_support_flags;
 };
 
 /* yyyymmdd of last incompatible change to xrdp_client_info */
-#define CLIENT_INFO_CURRENT_VERSION 20220428
+/* also used for changes to all the xrdp installed headers */
+#define CLIENT_INFO_CURRENT_VERSION 20230425
 
 #endif