shadow_subsystem_builtin.c

 
#include <freerdp/config.h>
 
#include <freerdp/server/shadow.h>
#include <freerdp/log.h>
 
#define TAG SERVER_TAG("shadow")
 
typedef struct
{
  const char* (*name)(void);
  pfnShadowSubsystemEntry entry;
} RDP_SHADOW_SUBSYSTEM;
 
#if defined(WITH_SHADOW_MUTTER)
extern int MutterShadowSubsystemEntry(RDP_SHADOW_ENTRY_POINTS* pEntryPoints);
extern const char* MutterShadowSubsystemName(void);
#endif
 
#if defined(WITH_SHADOW_PLATFORM)
/* The platform's own: Win, Mac, X11 or Sample */
extern int ShadowSubsystemEntry(RDP_SHADOW_ENTRY_POINTS* pEntryPoints);
extern const char* ShadowSubsystemName(void);
#endif
 
/* In the order they are tried. Mutter comes first: inside a GNOME session on
 * Wayland, X11 would only see Xwayland, and outside GNOME Mutter finds nothing. */
static const RDP_SHADOW_SUBSYSTEM g_Subsystems[] = {
#if defined(WITH_SHADOW_MUTTER)
  { MutterShadowSubsystemName, MutterShadowSubsystemEntry },
#endif
#if defined(WITH_SHADOW_PLATFORM)
  { ShadowSubsystemName, ShadowSubsystemEntry },
#endif
};
 
static const size_t g_SubsystemCount = ARRAYSIZE(g_Subsystems);
 
WINPR_ATTR_NODISCARD
static pfnShadowSubsystemEntry shadow_subsystem_load_static_entry(const char* name)
{
  WINPR_ASSERT(name);
 
  for (size_t index = 0; index < g_SubsystemCount; index++)
  {
    const RDP_SHADOW_SUBSYSTEM* cur = &g_Subsystems[index];
    WINPR_ASSERT(cur->name);
    WINPR_ASSERT(cur->entry);
 
    if (strcmp(name, cur->name()) == 0)
      return cur->entry;
  }
 
  return nullptr;
}
 
void shadow_subsystem_set_entry_builtin(const char* name)
{
  if (!name)
  {
    /* all of them: the server picks one when it starts (see /subsystem) */
    for (size_t index = 0; index < g_SubsystemCount; index++)
    {
      const RDP_SHADOW_SUBSYSTEM* cur = &g_Subsystems[index];
      if (!shadow_subsystem_add_entry(cur->name(), cur->entry))
        WLog_ERR(TAG, "cannot add the %s subsystem", cur->name());
    }
    return;
  }
 
  pfnShadowSubsystemEntry entry = shadow_subsystem_load_static_entry(name);
 
  if (entry)
    shadow_subsystem_set_entry(entry);
}