diff --git a/include/patty/ax25/mux.h b/include/patty/ax25/mux.h
new file mode 100644
index 0000000..ffadd62
--- /dev/null
+++ b/include/patty/ax25/mux.h
@@ -0,0 +1,33 @@
+#ifndef _PATTY_AX25_MUX_H
+#define _PATTY_AX25_MUX_H
+
+enum patty_ax25_mux_data_type {
+    PATTY_AX25_MUX_VOID,
+    PATTY_AX25_MUX_INT,
+    PATTY_AX25_MUX_SSIZE_T,
+    PATTY_AX25_MUX_ADDR
+};
+
+enum patty_ax25_mux_request_type {
+    PATTY_AX25_MUX_UNKNOWN,
+    PATTY_AX25_MUX_SOCKET,
+    PATTY_AX25_MUX_BIND,
+    PATTY_AX25_MUX_LISTEN,
+    PATTY_AX25_MUX_ACCEPT,
+    PATTY_AX25_MUX_CONNECT,
+    PATTY_AX25_MUX_CLOSE,
+    PATTY_AX25_MUX_SENDTO,
+    PATTY_AX25_MUX_RECVFROM
+};
+
+int patty_ax25_mux_send(int fd,
+                        enum patty_ax25_mux_request_type type,
+                        void *data,
+                        size_t len);
+
+int patty_ax25_mux_recv(int fd,
+                        enum patty_ax25_mux_response_type type,
+                        void *data,
+                        size_t len);
+
+#endif /* _PATTY_AX25_MUX_H */
diff --git a/include/patty/ax25/route.h b/include/patty/ax25/route.h
new file mode 100644
index 0000000..7699131
--- /dev/null
+++ b/include/patty/ax25/route.h
@@ -0,0 +1,11 @@
+#ifndef _PATTY_AX25_ROUTE_H
+#define _PATTY_AX25_ROUTE_H
+
+typedef struct _patty_ax25_route {
+    patty_ax25_addr dest,
+                    gateway;
+
+    patty_ax25_if *iface;
+} patty_ax25_route;
+
+#endif /* _PATTY_AX25_ROUTE_H */