diff --git a/src/tests/rua_helper.c b/src/tests/rua_helper.c
new file mode 100644
index 0000000..70e7724
--- /dev/null
+++ b/src/tests/rua_helper.c
@@ -0,0 +1,157 @@
+#include "rua_common.h"
+#include "rua_ies_defs.h"
+#include <osmocom/netif/stream.h>
+
+#include "hnbgw.h"
+#include "asn1helpers.h"
+
+struct msgb *rua_new_udt(struct msgb *inmsg)
+{
+	RUA_ConnectionlessTransfer_t out;
+	RUA_ConnectionlessTransferIEs_t ies;
+	struct msgb *msg;
+	int rc;
+
+	memset(&ies, 0, sizeof(ies));
+	OCTET_STRING_fromBuf(&ies.ranaP_Message.buf, inmsg->data, msgb_length(inmsg));
+	msgb_free(inmsg);
+
+	memset(&out, 0, sizeof(out));
+	rc = rua_encode_connectionlesstransferies(&out, &ies);
+	if (rc < 0)
+		return NULL;
+
+	msg = rua_generate_initiating_message(RUA_ProcedureCode_id_ConnectionlessTransfer,
+					      RUA_Criticality_reject,
+					      &asn_DEF_RUA_ConnectionlessTransfer,
+					      &out);
+
+	ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_RUA_ConnectionlessTransfer, &out);
+
+	DEBUGP(DMAIN, "transmitting RUA payload of %u bytes\n", msgb_length(msg));
+
+	msgb_sctp_ppid(msg) = IUH_PPI_RUA;
+
+	return msg;
+}
+
+struct msgb *rua_new_conn(int is_ps, uint32_t context_id, struct msgb *inmsg)
+{
+	RUA_Connect_t out;
+	RUA_ConnectIEs_t ies;
+	struct msgb *msg;
+	uint32_t ctxidbuf;
+	int rc;
+
+	memset(&ies, 0, sizeof(ies));
+	if (is_ps)
+		ies.cN_DomainIndicator = RUA_CN_DomainIndicator_ps_domain;
+	else
+		ies.cN_DomainIndicator = RUA_CN_DomainIndicator_cs_domain;
+	asn1_u24_to_bitstring(&ies.context_ID, &ctxidbuf, context_id);
+	ies.establishment_Cause = RUA_Establishment_Cause_normal_call;
+	OCTET_STRING_fromBuf(&ies.ranaP_Message.buf, inmsg->data, msgb_length(inmsg));
+	msgb_free(inmsg);
+
+	memset(&out, 0, sizeof(out));
+	rc = rua_encode_connecties(&out, &ies);
+	if (rc < 0)
+		return NULL;
+
+	msgb_free(inmsg);
+
+	msg = rua_generate_initiating_message(RUA_ProcedureCode_id_Connect,
+					      RUA_Criticality_reject,
+					      &asn_DEF_RUA_Connect,
+					      &out);
+
+	ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_RUA_Connect, &out);
+
+	DEBUGP(DMAIN, "transmitting RUA payload of %u bytes\n", msgb_length(msg));
+
+	msgb_sctp_ppid(msg) = IUH_PPI_RUA;
+
+	return msg;
+}
+
+struct msgb *rua_new_dt(int is_ps, uint32_t context_id, struct msgb *inmsg)
+{
+	RUA_DirectTransfer_t out;
+	RUA_DirectTransferIEs_t ies;
+	struct msgb *msg;
+	uint32_t ctxidbuf;
+	int rc;
+
+	memset(&ies, 0, sizeof(ies));
+	if (is_ps)
+		ies.cN_DomainIndicator = RUA_CN_DomainIndicator_ps_domain;
+	else
+		ies.cN_DomainIndicator = RUA_CN_DomainIndicator_cs_domain;
+	asn1_u24_to_bitstring(&ies.context_ID, &ctxidbuf, context_id);
+	OCTET_STRING_fromBuf(&ies.ranaP_Message.buf, inmsg->data, msgb_length(inmsg));
+	msgb_free(inmsg);
+
+	memset(&out, 0, sizeof(out));
+	rc = rua_encode_directtransferies(&out, &ies);
+	if (rc < 0)
+		return NULL;
+
+	msgb_free(inmsg);
+
+	msg = rua_generate_initiating_message(RUA_ProcedureCode_id_DirectTransfer,
+					      RUA_Criticality_reject,
+					      &asn_DEF_RUA_DirectTransfer,
+					      &out);
+
+	ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_RUA_DirectTransfer, &out);
+
+	DEBUGP(DMAIN, "transmitting RUA payload of %u bytes\n", msgb_length(msg));
+
+	msgb_sctp_ppid(msg) = IUH_PPI_RUA;
+
+	return msg;
+}
+
+struct msgb *rua_new_disc(int is_ps, uint32_t context_id, struct msgb *inmsg)
+{
+	RUA_Disconnect_t out;
+	RUA_DisconnectIEs_t ies;
+	struct msgb *msg;
+	uint32_t ctxidbuf;
+	int rc;
+
+	memset(&ies, 0, sizeof(ies));
+	if (is_ps)
+		ies.cN_DomainIndicator = RUA_CN_DomainIndicator_ps_domain;
+	else
+		ies.cN_DomainIndicator = RUA_CN_DomainIndicator_cs_domain;
+	asn1_u24_to_bitstring(&ies.context_ID, &ctxidbuf, context_id);
+	/* FIXME: make cause configurable */
+	ies.cause.present = RUA_Cause_PR_radioNetwork;
+	ies.cause.choice.radioNetwork = RUA_CauseRadioNetwork_normal;
+	if (inmsg && inmsg->data&& msgb_length(inmsg)) {
+		ies.presenceMask |= DISCONNECTIES_RUA_RANAP_MESSAGE_PRESENT;
+		OCTET_STRING_fromBuf(&ies.ranaP_Message.buf, inmsg->data, msgb_length(inmsg));
+		msgb_free(inmsg);
+	}
+
+	memset(&out, 0, sizeof(out));
+	rc = rua_encode_disconnecties(&out, &ies);
+	if (rc < 0)
+		return NULL;
+
+	msgb_free(inmsg);
+
+	msg = rua_generate_initiating_message(RUA_ProcedureCode_id_Disconnect,
+					      RUA_Criticality_reject,
+					      &asn_DEF_RUA_Disconnect,
+					      &out);
+
+	ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_RUA_Disconnect, &out);
+
+	DEBUGP(DMAIN, "transmitting RUA payload of %u bytes\n", msgb_length(msg));
+
+	msgb_sctp_ppid(msg) = IUH_PPI_RUA;
+
+	return msg;
+}
diff --git a/src/tests/rua_helper.h b/src/tests/rua_helper.h
new file mode 100644
index 0000000..ca2f4e8
--- /dev/null
+++ b/src/tests/rua_helper.h
@@ -0,0 +1,9 @@
+#pragma once
+
+#include <stdint.h>
+#include <osmocom/core/msgb.h>
+
+struct msgb *rua_new_udt(struct msgb *inmsg);
+struct msgb *rua_new_conn(int is_ps, uint32_t context_id, struct msgb *inmsg);
+struct msgb *rua_new_dt(int is_ps, uint32_t context_id, struct msgb *inmsg);
+struct msgb *rua_new_disc(int is_ps, uint32_t context_id, struct msgb *inmsg);