diff --git a/openbsc/include/osmocom/gprs/gprs_ns.h b/openbsc/include/osmocom/gprs/gprs_ns.h
index 206873b..a7f32b2 100644
--- a/openbsc/include/osmocom/gprs/gprs_ns.h
+++ b/openbsc/include/osmocom/gprs/gprs_ns.h
@@ -3,85 +3,6 @@
 
 #include <stdint.h>
 
-/* GPRS Networks Service (NS) messages on the Gb interface
- * 3GPP TS 08.16 version 8.0.1 Release 1999 / ETSI TS 101 299 V8.0.1 (2002-05)
- * 3GPP TS 48.016 version 6.5.0 Release 6 / ETSI TS 148 016 V6.5.0 (2005-11) */
-
-/*! \addtogroup libgb
- *  @{
- */
-
-/*! \file gprs_ns.h */
-
-/*! \brief Common header of GPRS NS */
-struct gprs_ns_hdr {
-	uint8_t pdu_type;	/*!< NS PDU type */
-	uint8_t data[0];	/*!< variable-length payload */
-} __attribute__((packed));
-
-/*! \brief NS PDU Type (TS 08.16, Section 10.3.7, Table 14) */
-enum ns_pdu_type {
-	NS_PDUT_UNITDATA	= 0x00,
-	NS_PDUT_RESET		= 0x02,
-	NS_PDUT_RESET_ACK	= 0x03,
-	NS_PDUT_BLOCK		= 0x04,
-	NS_PDUT_BLOCK_ACK	= 0x05,
-	NS_PDUT_UNBLOCK		= 0x06,
-	NS_PDUT_UNBLOCK_ACK	= 0x07,
-	NS_PDUT_STATUS		= 0x08,
-	NS_PDUT_ALIVE		= 0x0a,
-	NS_PDUT_ALIVE_ACK	= 0x0b,
-	/* TS 48.016 Section 10.3.7, Table 10.3.7.1 */
-	SNS_PDUT_ACK		= 0x0c,
-	SNS_PDUT_ADD		= 0x0d,
-	SNS_PDUT_CHANGE_WEIGHT	= 0x0e,
-	SNS_PDUT_CONFIG		= 0x0f,
-	SNS_PDUT_CONFIG_ACK	= 0x10,
-	SNS_PDUT_DELETE		= 0x11,
-	SNS_PDUT_SIZE		= 0x12,
-	SNS_PDUT_SIZE_ACK	= 0x13,
-};
-
-/*! \brief NS Control IE (TS 08.16, Section 10.3, Table 12) */
-enum ns_ctrl_ie {
-	NS_IE_CAUSE		= 0x00,
-	NS_IE_VCI		= 0x01,
-	NS_IE_PDU		= 0x02,
-	NS_IE_BVCI		= 0x03,
-	NS_IE_NSEI		= 0x04,
-	/* TS 48.016 Section 10.3, Table 10.3.1 */
-	NS_IE_IPv4_LIST		= 0x05,
-	NS_IE_IPv6_LIST		= 0x06,
-	NS_IE_MAX_NR_NSVC	= 0x07,
-	NS_IE_IPv4_EP_NR	= 0x08,
-	NS_IE_IPv6_EP_NR	= 0x09,
-	NS_IE_RESET_FLAG	= 0x0a,
-	NS_IE_IP_ADDR		= 0x0b,
-};
-
-/*! \brief NS Cause (TS 08.16, Section 10.3.2, Table 13) */
-enum ns_cause {
-	NS_CAUSE_TRANSIT_FAIL		= 0x00,
-	NS_CAUSE_OM_INTERVENTION	= 0x01,
-	NS_CAUSE_EQUIP_FAIL		= 0x02,
-	NS_CAUSE_NSVC_BLOCKED		= 0x03,
-	NS_CAUSE_NSVC_UNKNOWN		= 0x04,
-	NS_CAUSE_BVCI_UNKNOWN		= 0x05,
-	NS_CAUSE_SEM_INCORR_PDU		= 0x08,
-	NS_CAUSE_PDU_INCOMP_PSTATE	= 0x0a,
-	NS_CAUSE_PROTO_ERR_UNSPEC	= 0x0b,
-	NS_CAUSE_INVAL_ESSENT_IE	= 0x0c,
-	NS_CAUSE_MISSING_ESSENT_IE	= 0x0d,
-	/* TS 48.016 Section 10.3.2, Table 10.3.2.1 */
-	NS_CAUSE_INVAL_NR_IPv4_EP	= 0x0e,
-	NS_CAUSE_INVAL_NR_IPv6_EP	= 0x0f,
-	NS_CAUSE_INVAL_NR_NS_VC		= 0x10,
-	NS_CAUSE_INVAL_WEIGH		= 0x11,
-	NS_CAUSE_UNKN_IP_EP		= 0x12,
-	NS_CAUSE_UNKN_IP_ADDR		= 0x13,
-	NS_CAUSE_UNKN_IP_TEST_FAILED	= 0x14,
-};
-
 /* Our Implementation */
 #include <netinet/in.h>
 #include <osmocom/core/linuxlist.h>
@@ -90,6 +11,8 @@
 #include <osmocom/core/select.h>
 #include <osmocom/gprs/gprs_msgb.h>
 
+#include <osmocom/gprs/protocol/gsm_08_16.h>
+
 #define NS_TIMERS_COUNT 7
 #define NS_TIMERS "(tns-block|tns-block-retries|tns-reset|tns-reset-retries|tns-test|tns-alive|tns-alive-retries)"
 #define NS_TIMERS_HELP	\