initial import of Osmocom TETRA phy and lower MAC code

src/osmo_prim.h

@@ -0,0 +1,19 @@
+#ifndef OSMO_PRIMITIVE_H
+#define OSMO_PRIMITIVE_H
+
+#include <stdint.h>
+
+enum osmo_prim_operation {
+	PRIM_OP_REQUEST,
+	PRIM_OP_RESPONSE,
+	PRIM_OP_INDICATION,
+	PRIM_OP_CONFIRM,
+};
+
+struct osmo_prim_hdr {
+	uint16_t sap;
+	uint16_t primitive;
+	enum osmo_prim_operation operation;
+};
+
+#endif