Version 1.08 with public source code release.

src/main/hook/x2/unlock.c

@@ -0,0 +1,81 @@
+#define LOG_MODULE "hook-x2-unlock"
+
+#include <assert.h>
+#include <string.h>
+
+#include "asset/x2/lib/settings.h"
+
+#include "capnhook/hook/filehook.h"
+
+#include "util/log.h"
+#include "util/str.h"
+
+static FILE* _hook_x2_unlock_settings_file = NULL;
+
+static enum cnh_result _hook_x2_unlock_filehook(struct cnh_filehook_irp *irp);
+
+void hook_x2_unlock_init(void)
+{
+    cnh_filehook_push_handler(_hook_x2_unlock_filehook);
+
+    log_info("Initialized");
+}
+
+static enum cnh_result _hook_x2_unlock_filehook(struct cnh_filehook_irp *irp)
+{
+    enum cnh_result result;
+
+    assert(irp);
+
+    if (irp->op != CNH_FILEHOOK_IRP_OP_OPEN && irp->file != _hook_x2_unlock_settings_file) {
+        return cnh_filehook_invoke_next(irp);
+    }
+
+    switch (irp->op) {
+        case CNH_FILEHOOK_IRP_OP_OPEN:
+        {
+            /* Let it open the real file */
+            result = cnh_filehook_invoke_next(irp);
+
+            if (util_str_ends_with(irp->open_filename, ASSET_X2_SETTINGS_FILE_NAME)) {
+                if (result == CNH_RESULT_SUCCESS) {
+                    log_debug("Intercepting settings file open");
+                    _hook_x2_unlock_settings_file = irp->file;
+                }
+            }
+
+            break;
+        }
+
+        case CNH_FILEHOOK_IRP_OP_READ:
+        {
+            /* Let it read the real file */
+            result = cnh_filehook_invoke_next(irp);
+
+            if (result == CNH_RESULT_SUCCESS) {
+                struct asset_x2_settings* settings = (struct asset_x2_settings*) irp->read.bytes;
+
+                asset_x2_settings_unlock_all(settings);
+
+                log_debug("Applied unlock patch to loaded settings (buffer size %d)", irp->read.pos);
+            }
+
+            break;
+        }
+
+        case CNH_FILEHOOK_IRP_OP_CLOSE:
+        {
+            _hook_x2_unlock_settings_file = NULL;
+
+            result = cnh_filehook_invoke_next(irp);
+
+            break;
+        }
+
+        default:
+            result = cnh_filehook_invoke_next(irp);
+            break;
+    }
+
+    return result;
+}