diff --git a/include/osmocom/mgcp/mgcp_protocol.h b/include/osmocom/mgcp/mgcp_protocol.h
new file mode 100644
index 0000000..abd264c
--- /dev/null
+++ b/include/osmocom/mgcp/mgcp_protocol.h
@@ -0,0 +1,27 @@
+#pragma once
+
+/* Internal structure while parsing a request */
+struct mgcp_parse_data {
+	struct mgcp_config *cfg;
+	struct mgcp_endpoint *endp;
+	char *trans;
+	char *save;
+};
+
+/* Local connection options */
+struct mgcp_lco {
+	char *string;
+	char *codec;
+	int pkt_period_min; /* time in ms */
+	int pkt_period_max; /* time in ms */
+};
+
+char *get_lco_identifier(const char *options);
+int check_local_cx_options(void *ctx, const char *options);
+
+struct mgcp_rtp_end;
+void mgcp_rtp_end_config(struct mgcp_endpoint *endp, int expect_ssrc_change,
+			 struct mgcp_rtp_end *rtp);
+
+uint32_t mgcp_rtp_packet_duration(struct mgcp_endpoint *endp,
+				  struct mgcp_rtp_end *rtp);