diff --git a/include/ptycon/ptycon.h b/include/ptycon/ptycon.h
index 2f111b7..ce0fbd7 100644
--- a/include/ptycon/ptycon.h
+++ b/include/ptycon/ptycon.h
@@ -18,6 +18,12 @@ extern "C" {
 #endif
 #endif
 
+/* daemon */
+#define PTYC_PORT_GUID_DAEMON		{0x38a31275,  \
+					  0x8c52,     \
+					  0x4285,     \
+					 {0xaa,0x34,0x70,0xe0,0x6c,0x30,0x6d,0xe5}}
+
 /* status codes */
 #define PTYC_OK				0x00
 #define PTYC_USAGE			0x01
diff --git a/project/headers.mk b/project/headers.mk
index 98ecdf5..9da8130 100644
--- a/project/headers.mk
+++ b/project/headers.mk
@@ -8,6 +8,7 @@ INTERNAL_HEADERS = \
 	$(PROJECT_DIR)/src/internal/gdi/gdi_system.h \
 	$(PROJECT_DIR)/src/internal/gdi/gdi_window.h \
 	$(PROJECT_DIR)/src/internal/$(PACKAGE)_bridge_impl.h \
+	$(PROJECT_DIR)/src/internal/$(PACKAGE)_daemon_impl.h \
 	$(PROJECT_DIR)/src/internal/$(PACKAGE)_driver_impl.h \
 	$(PROJECT_DIR)/src/internal/$(PACKAGE)_init_impl.h \
 	$(PROJECT_DIR)/src/internal/$(PACKAGE)_ioctl_impl.h \
diff --git a/src/internal/ptycon_daemon_impl.h b/src/internal/ptycon_daemon_impl.h
new file mode 100644
index 0000000..1595984
--- /dev/null
+++ b/src/internal/ptycon_daemon_impl.h
@@ -0,0 +1,37 @@
+#ifndef PTYCON_DAEMON_IMPL_H
+#define PTYCON_DAEMON_IMPL_H
+
+#include <psxtypes/psxtypes.h>
+#include <ntapi/ntapi.h>
+
+enum ptyc_daemon_opcodes {
+	PTYC_DAEMON_OPCODE_BASE	= 0x20000,
+	PTYC_DAEMON_CONNECT	= PTYC_DAEMON_OPCODE_BASE,
+	PTYC_DAEMON_DISCONNECT,
+	PTYC_DAEMON_TTYSIGNAL,
+	PTYC_DAEMON_IPCSIGNAL,
+	PTYC_DAEMON_SIGCHLD,
+	PTYC_DAEMON_THREADEXIT,
+	PTYC_DAEMON_OPCODE_CAP
+};
+
+typedef int32_t __stdcall ptyc_daemon_routine(nt_tty_port_msg *);
+
+struct ptyc_daemon_ctx {
+	nt_port_keys		daemon_keys;
+	nt_port_attr		daemon_attr;
+	nt_port_name		daemon_name;
+
+	void *			hport_daemon;
+	void *			hevent_daemon_ready;
+
+	void *			hport_internal_client;
+	void *			hevent_internal_client_ready;
+};
+
+int32_t __stdcall ptyc_daemon_init(struct ptyc_daemon_ctx *, uint64_t);
+int32_t __stdcall ptyc_daemon_loop(void *);
+int32_t __stdcall ptyc_daemon_connect(nt_tty_port_msg *);
+int32_t __stdcall ptyc_daemon_signal(nt_tty_port_msg *);
+
+#endif