put Iu-common and Iu-CS stuff in proper places

Add libiu to contain the parts used by both Iu-CS (in osmo-cscn) and Iu-PS (in
gprs) into libiu. It's rather thin and may make sense to move to osmo-iuh
altogether, eventually.

iu.c is half moved to libiu/, and half to osmo-cscn/iu_cs.c.

2 files changed, 2 insertions, 558 deletions

diff --git a/openbsc/src/gprs/Makefile.am b/openbsc/src/gprs/Makefile.am
index fb26272fc..187b07ed9 100644
--- a/openbsc/src/gprs/Makefile.am
+++ b/openbsc/src/gprs/Makefile.am
@@ -32,11 +32,11 @@ osmo_sgsn_SOURCES =	gprs_gmm.c gprs_sgsn.c gprs_sndcp.c gprs_sndcp_vty.c \
 			sgsn_ctrl.c sgsn_auth.c gprs_subscriber.c \
 			gprs_gsup_messages.c gprs_utils.c gprs_gsup_client.c \
 			gsm_04_08_gprs.c sgsn_cdr.c sgsn_ares.c \
-			oap.c oap_messages.c	\
-			iu.c
+			oap.c oap_messages.c
 
 osmo_sgsn_LDADD = 	\
 			$(top_builddir)/src/libcommon/libcommon.a \
+			$(top_builddir)/src/libiu/libiu.a \
 			-lgtp $(OSMO_LIBS) $(LIBOSMOABIS_LIBS) $(LIBCARES_LIBS) \
 			$(LIBCRYPTO_LIBS) -lrt \
 			$(LIBOSMOSIGTRAN_LIBS) $(LIBOSMORANAP_LIBS) $(LIBASN1C_LIBS)
diff --git a/openbsc/src/gprs/iu.c b/openbsc/src/gprs/iu.c
deleted file mode 100644
index 43056bbc3..000000000
--- a/openbsc/src/gprs/iu.c
+++ /dev/null
@@ -1,556 +0,0 @@
-#include <stdint.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-
-#include <osmocom/core/select.h>
-#include <osmocom/core/prim.h>
-#include <osmocom/core/talloc.h>
-#include <osmocom/core/logging.h>
-#include <osmocom/core/application.h>
-#include <osmocom/vty/logging.h>
-
-#include <osmocom/gsm/gsm48.h>
-#include <osmocom/gprs/gprs_msgb.h>
-
-#include <osmocom/sigtran/sua.h>
-#include <osmocom/sigtran/sccp_sap.h>
-
-#include <openbsc/gprs_sgsn.h>
-#include <openbsc/iu.h>
-#include <openbsc/debug.h>
-
-#include <osmocom/ranap/ranap_ies_defs.h>
-#include <osmocom/ranap/ranap_common.h>
-#include <osmocom/ranap/ranap_common_cn.h>
-#include <osmocom/ranap/ranap_msg_factory.h>
-
-#include <asn1c/asn1helpers.h>
-
-int asn1_xer_print = 1;
-void *talloc_asn1_ctx;
-
-iu_recv_cb_t global_iu_recv_cb = NULL;
-
-static LLIST_HEAD(ue_conn_ctx_list);
-
-struct ue_conn_ctx *ue_conn_ctx_alloc(struct osmo_sua_link *link, uint32_t conn_id)
-{
-	struct ue_conn_ctx *ctx = talloc_zero(NULL, struct ue_conn_ctx);
-
-	ctx->link = link;
-	ctx->conn_id = conn_id;
-	llist_add(&ctx->list, &ue_conn_ctx_list);
-
-	return ctx;
-}
-
-struct ue_conn_ctx *ue_conn_ctx_find(struct osmo_sua_link *link, uint32_t conn_id)
-{
-	struct ue_conn_ctx *ctx;
-
-	llist_for_each_entry(ctx, &ue_conn_ctx_list, list) {
-		if (ctx->link == link && ctx->conn_id == conn_id)
-			return ctx;
-	}
-	return NULL;
-}
-
-/***********************************************************************
- * RANAP handling
- ***********************************************************************/
-
-static int iu_rab_act(struct ue_conn_ctx *ue_ctx, struct msgb *msg)
-{
-	struct osmo_scu_prim *prim;
-
-	/* wrap RANAP message in SCCP N-DATA.req */
-	prim = (struct osmo_scu_prim *) msgb_push(msg, sizeof(*prim));
-	prim->u.data.conn_id = ue_ctx->conn_id;
-	osmo_prim_init(&prim->oph,
-		       SCCP_SAP_USER,
-		       OSMO_SCU_PRIM_N_DATA,
-		       PRIM_OP_REQUEST,
-		       msg);
-	return osmo_sua_user_link_down(ue_ctx->link, &prim->oph);
-}
-
-int iu_rab_act_cs(struct ue_conn_ctx *ue_ctx, uint32_t rtp_ip, uint16_t rtp_port)
-{
-	struct msgb *msg;
-
-	msg = ranap_new_msg_rab_assign_voice(1, rtp_ip, rtp_port);
-	msg->l2h = msg->data;
-	return iu_rab_act(ue_ctx, msg);
-}
-
-int iu_rab_act_ps(struct ue_conn_ctx *ue_ctx, uint32_t gtp_ip, uint32_t gtp_tei)
-{
-	struct msgb *msg;
-
-	msg = ranap_new_msg_rab_assign_data(1, gtp_ip, gtp_tei);
-	msg->l2h = msg->data;
-	return iu_rab_act(ue_ctx, msg);
-}
-
-int gprs_iu_rab_deact(struct sgsn_mm_ctx *mm)
-{
-	/* FIXME */
-	return -1;
-}
-
-int gprs_transp_upd_key(struct sgsn_mm_ctx *mm)
-{
-	struct gsm_auth_tuple *tp = &mm->auth_triplet;
-
-	if (mm->ran_type == MM_CTX_T_UTRAN_Iu) {
-		struct ue_conn_ctx *uectx;
-		struct osmo_scu_prim *prim;
-		struct msgb *msg;
-		uint8_t ik[16];
-		uint8_t ck[16];
-		unsigned int i;
-
-		uectx = mm->iu.ue_ctx;
-
-		/* C4 function to dervie CK from Kc */
-		memcpy(ck, tp->kc, 8);
-		memcpy(ck+8, tp->kc, 8);
-
-		/* C5 function to derive IK from Kc */
-		for (i = 0; i < 4; i++)
-			ik[i] = tp->kc[i] ^ tp->kc[i+4];
-		memcpy(ik+4, tp->kc, 8);
-		for (i = 12; i < 16; i++)
-			ik[i] = ik[i-12];
-
-		/* crate RANAP message */
-		msg = ranap_new_msg_sec_mod_cmd(ik, NULL);
-		msg->l2h = msg->data;
-		/* wrap RANAP message in SCCP N-DATA.req */
-		prim = (struct osmo_scu_prim *) msgb_push(msg, sizeof(*prim));
-		prim->u.data.conn_id = uectx->conn_id;
-		osmo_prim_init(&prim->oph, SCCP_SAP_USER,
-				OSMO_SCU_PRIM_N_DATA,
-				PRIM_OP_REQUEST, msg);
-		osmo_sua_user_link_down(uectx->link, &prim->oph);
-	}
-
-	return 0;
-}
-
-
-static int ranap_handle_co_initial_ue(void *ctx, RANAP_InitialUE_MessageIEs_t *ies)
-{
-	struct gprs_ra_id ra_id;
-	uint16_t sai;
-	struct msgb *msg = msgb_alloc(256, "RANAP->NAS");
-
-	ranap_parse_lai(&ra_id, &ies->lai);
-	sai = asn1str_to_u16(&ies->sai.sAC);
-	msgb_gmmh(msg) = msgb_put(msg, ies->nas_pdu.size);
-	memcpy(msgb_gmmh(msg), ies->nas_pdu.buf, ies->nas_pdu.size);
-
-	/* Feed into the MM layer */
-	msg->dst = ctx;
-	global_iu_recv_cb(msg, &ra_id, &sai);
-
-	return 0;
-}
-
-static int ranap_handle_co_dt(void *ctx, RANAP_DirectTransferIEs_t *ies)
-{
-	struct gprs_ra_id _ra_id, *ra_id = NULL;
-	uint16_t _sai, *sai = NULL;
-	struct msgb *msg = msgb_alloc(256, "RANAP->NAS");
-
-	if (ies->presenceMask & DIRECTTRANSFERIES_RANAP_LAI_PRESENT) {
-		ranap_parse_lai(&_ra_id, &ies->lai);
-		ra_id = &_ra_id;
-		if (ies->presenceMask & DIRECTTRANSFERIES_RANAP_RAC_PRESENT) {
-			_ra_id.rac = asn1str_to_u8(&ies->rac);
-		}
-		if (ies->presenceMask & DIRECTTRANSFERIES_RANAP_SAI_PRESENT) {
-			_sai = asn1str_to_u16(&ies->sai.sAC);
-			sai = &_sai;
-		}
-	}
-
-	msgb_gmmh(msg) = msgb_put(msg, ies->nas_pdu.size);
-	memcpy(msgb_gmmh(msg), ies->nas_pdu.buf, ies->nas_pdu.size);
-
-	/* Feed into the MM/CC/SMS-CP layer */
-	msg->dst = ctx;
-	global_iu_recv_cb(msg, ra_id, sai);
-
-	return 0;
-}
-
-static int ranap_handle_co_err_ind(void *ctx, RANAP_ErrorIndicationIEs_t *ies)
-{
-	if (ies->presenceMask & ERRORINDICATIONIES_RANAP_CAUSE_PRESENT)
-		LOGP(DRANAP, LOGL_ERROR, "Rx Error Indication (%s)\n",
-			ranap_cause_str(&ies->cause));
-	else
-		LOGP(DRANAP, LOGL_ERROR, "Rx Error Indication\n");
-
-	return 0;
-}
-
-int iu_tx(struct msgb *msg, uint8_t sapi)
-{
-	struct ue_conn_ctx *uectx = msg->dst;
-	struct osmo_scu_prim *prim;
-
-	LOGP(DRANAP, LOGL_INFO, "Transmitting L3 Message as RANAP DT\n");
-
-	msg = ranap_new_msg_dt(sapi, msg->data, msgb_length(msg));
-	msg->l2h = msg->data;
-	prim = (struct osmo_scu_prim *) msgb_push(msg, sizeof(*prim));
-	prim->u.data.conn_id = uectx->conn_id;
-	osmo_prim_init(&prim->oph, SCCP_SAP_USER,
-			OSMO_SCU_PRIM_N_DATA,
-			PRIM_OP_REQUEST, msg);
-	osmo_sua_user_link_down(uectx->link, &prim->oph);
-	return 0;
-}
-
-static int ranap_handle_co_iu_rel_req(struct ue_conn_ctx *ctx, RANAP_Iu_ReleaseRequestIEs_t *ies)
-{
-	struct msgb *msg;
-	struct osmo_scu_prim *prim;
-
-	LOGP(DRANAP, LOGL_INFO, "Received Iu Release Request, Sending Release Command\n");
-	msg = ranap_new_msg_iu_rel_cmd(&ies->cause);
-	msg->l2h = msg->data;
-	prim = (struct osmo_scu_prim *) msgb_push(msg, sizeof(*prim));
-	prim->u.data.conn_id = ctx->conn_id;
-	osmo_prim_init(&prim->oph, SCCP_SAP_USER,
-			OSMO_SCU_PRIM_N_DATA,
-			PRIM_OP_REQUEST, msg);
-	osmo_sua_user_link_down(ctx->link, &prim->oph);
-	return 0;
-}
-
-static int ranap_handle_co_rab_ass_resp(void *ctx, RANAP_RAB_AssignmentResponseIEs_t *ies)
-{
-	int rc;
-
-	LOGP(DRANAP, LOGL_INFO, "RAB Asignment Response:");
-	if (ies->presenceMask & RAB_ASSIGNMENTRESPONSEIES_RANAP_RAB_SETUPORMODIFIEDLIST_PRESENT) {
-		RANAP_RAB_SetupOrModifiedItemIEs_t setup_ies;
-		RANAP_RAB_SetupOrModifiedItem_t *item = &setup_ies.raB_SetupOrModifiedItem;
-		rc = ranap_decode_rab_setupormodifieditemies(&setup_ies,
-							     (ANY_t *)&ies->raB_SetupOrModifiedList);
-		if (item->transportLayerAddress) {
-			uint8_t rab_id = item->rAB_ID.buf[0];
-			LOGPC(DRANAP, LOGL_INFO, " Setup: (%u/%s)",
-			      rab_id,
-			      osmo_hexdump(item->transportLayerAddress->buf,
-					   item->transportLayerAddress->size));
-		}
-	}
-
-	LOGPC(DRANAP, LOGL_INFO, "\n");
-
-	return rc;
-}
-
-/* Entry point for connection-oriented RANAP message */
-static void cn_ranap_handle_co(void *ctx, ranap_message *message)
-{
-	int rc;
-
-	LOGP(DRANAP, LOGL_NOTICE, "handle_co(dir=%u, proc=%u)\n", message->direction, message->procedureCode);
-
-	switch (message->direction) {
-	case RANAP_RANAP_PDU_PR_initiatingMessage:
-		switch (message->procedureCode) {
-		case RANAP_ProcedureCode_id_InitialUE_Message:
-			rc = ranap_handle_co_initial_ue(ctx, &message->msg.initialUE_MessageIEs);
-			break;
-		case RANAP_ProcedureCode_id_DirectTransfer:
-			rc = ranap_handle_co_dt(ctx, &message->msg.directTransferIEs);
-			break;
-		case RANAP_ProcedureCode_id_ErrorIndication:
-			rc = ranap_handle_co_err_ind(ctx, &message->msg.errorIndicationIEs);
-			break;
-		case RANAP_ProcedureCode_id_Iu_ReleaseRequest:
-			/* Iu Release Request */
-			rc = ranap_handle_co_iu_rel_req(ctx, &message->msg.iu_ReleaseRequestIEs);
-			break;
-		default:
-			rc = -1;
-			break;
-		}
-		break;
-	case RANAP_RANAP_PDU_PR_successfulOutcome:
-		switch (message->procedureCode) {
-		case RANAP_ProcedureCode_id_RAB_Assignment:
-			/* RAB Assignment Response */
-			rc = ranap_handle_co_rab_ass_resp(ctx, &message->msg.raB_AssignmentResponseIEs);
-			break;
-		case RANAP_ProcedureCode_id_SecurityModeControl:
-			/* Security Mode Complete */
-			rc = -1;
-			break;
-		case RANAP_ProcedureCode_id_Iu_Release:
-			/* Iu Release Complete */
-			rc = -1;
-			break;
-		default:
-			rc = -1;
-			break;
-		}
-	case RANAP_RANAP_PDU_PR_unsuccessfulOutcome:
-	case RANAP_RANAP_PDU_PR_outcome:
-	default:
-		rc = -1;
-		break;
-	}
-
-	if (rc) {
-		LOGP(DRANAP, LOGL_ERROR, "Error in cn_ranap_handle_co (%d)\n",
-		     rc);
-		/* TODO handling of the error? */
-	}
-}
-
-static int ranap_handle_cl_reset_req(void *ctx, RANAP_ResetIEs_t *ies)
-{
-	/* FIXME: send reset response */
-	return -1;
-}
-
-static int ranap_handle_cl_err_ind(void *ctx, RANAP_ErrorIndicationIEs_t *ies)
-{
-	if (ies->presenceMask & ERRORINDICATIONIES_RANAP_CAUSE_PRESENT)
-		LOGP(DRANAP, LOGL_ERROR, "Rx Error Indication (%s)\n",
-			ranap_cause_str(&ies->cause));
-	else
-		LOGP(DRANAP, LOGL_ERROR, "Rx Error Indication\n");
-
-	return 0;
-}
-
-/* Entry point for connection-less RANAP message */
-static void cn_ranap_handle_cl(void *ctx, ranap_message *message)
-{
-	int rc;
-
-	switch (message->direction) {
-	case RANAP_RANAP_PDU_PR_initiatingMessage:
-		switch (message->procedureCode) {
-		case RANAP_ProcedureCode_id_Reset:
-			/* received reset.req, send reset.resp */
-			rc = ranap_handle_cl_reset_req(ctx, &message->msg.resetIEs);
-			break;
-		case RANAP_ProcedureCode_id_ErrorIndication:
-			rc = ranap_handle_cl_err_ind(ctx, &message->msg.errorIndicationIEs);
-			break;
-		default:
-			rc = -1;
-			break;
-		}
-		break;
-	case RANAP_RANAP_PDU_PR_successfulOutcome:
-	case RANAP_RANAP_PDU_PR_unsuccessfulOutcome:
-	case RANAP_RANAP_PDU_PR_outcome:
-	default:
-		rc = -1;
-		break;
-	}
-
-	if (rc) {
-		LOGP(DRANAP, LOGL_ERROR, "Error in cn_ranap_handle_cl (%d)\n",
-		     rc);
-		/* TODO handling of the error? */
-	}
-}
-
-/***********************************************************************
- *
- ***********************************************************************/
-
-int tx_unitdata(struct osmo_sua_link *link);
-int tx_conn_req(struct osmo_sua_link *link, uint32_t conn_id);
-
-struct osmo_prim_hdr *make_conn_req(uint32_t conn_id);
-struct osmo_prim_hdr *make_dt1_req(uint32_t conn_id, const uint8_t *data, unsigned int len);
-
-struct osmo_prim_hdr *make_conn_resp(struct osmo_scu_connect_param *param)
-{
-	struct msgb *msg = msgb_alloc(1024, "conn_resp");
-	struct osmo_scu_prim *prim;
-
-	prim = (struct osmo_scu_prim *) msgb_put(msg, sizeof(*prim));
-	osmo_prim_init(&prim->oph, SCCP_SAP_USER,
-			OSMO_SCU_PRIM_N_CONNECT,
-			PRIM_OP_RESPONSE, msg);
-	memcpy(&prim->u.connect, param, sizeof(prim->u.connect));
-	return &prim->oph;
-}
-
-static int sccp_sap_up(struct osmo_prim_hdr *oph, void *link)
-{
-	struct osmo_scu_prim *prim = (struct osmo_scu_prim *) oph;
-	struct osmo_prim_hdr *resp = NULL;
-	int rc;
-	struct ue_conn_ctx *ue;
-
-	printf("sccp_sap_up(%s)\n", osmo_scu_prim_name(oph));
-
-	switch (OSMO_PRIM_HDR(oph)) {
-	case OSMO_PRIM(OSMO_SCU_PRIM_N_CONNECT, PRIM_OP_CONFIRM):
-		/* confirmation of outbound connection */
-		rc = -1;
-		break;
-	case OSMO_PRIM(OSMO_SCU_PRIM_N_CONNECT, PRIM_OP_INDICATION):
-		/* indication of new inbound connection request*/
-		printf("N-CONNECT.ind(X->%u)\n", prim->u.connect.conn_id);
-		if (/*  prim->u.connect.called_addr.ssn != OSMO_SCCP_SSN_RANAP || */
-		    !msgb_l2(oph->msg) || msgb_l2len(oph->msg) == 0) {
-			LOGP(DGPRS, LOGL_NOTICE, "Received invalid N-CONNECT.ind\n");
-			return 0;
-		}
-		ue = ue_conn_ctx_alloc(link, prim->u.connect.conn_id);
-		/* first ensure the local SUA/SCCP socket is ACTIVE */
-		resp = make_conn_resp(&prim->u.connect);
-		osmo_sua_user_link_down(link, resp);
-		/* then handle the RANAP payload */
-		rc = ranap_cn_rx_co(cn_ranap_handle_co, ue, msgb_l2(oph->msg), msgb_l2len(oph->msg));
-		break;
-	case OSMO_PRIM(OSMO_SCU_PRIM_N_DISCONNECT, PRIM_OP_INDICATION):
-		/* indication of disconnect */
-		printf("N-DISCONNECT.ind(%u)\n", prim->u.disconnect.conn_id);
-		ue = ue_conn_ctx_find(link, prim->u.disconnect.conn_id);
-		rc = ranap_cn_rx_co(cn_ranap_handle_co, ue, msgb_l2(oph->msg), msgb_l2len(oph->msg));
-		break;
-	case OSMO_PRIM(OSMO_SCU_PRIM_N_DATA, PRIM_OP_INDICATION):
-		/* connection-oriented data received */
-		printf("N-DATA.ind(%u, %s)\n", prim->u.data.conn_id,
-			osmo_hexdump(msgb_l2(oph->msg), msgb_l2len(oph->msg)));
-		/* resolve UE context */
-		ue = ue_conn_ctx_find(link, prim->u.data.conn_id);
-		rc = ranap_cn_rx_co(cn_ranap_handle_co, ue, msgb_l2(oph->msg), msgb_l2len(oph->msg));
-		break;
-	case OSMO_PRIM(OSMO_SCU_PRIM_N_UNITDATA, PRIM_OP_INDICATION):
-		/* connection-oriented data received */
-		printf("N-UNITDATA.ind(%s)\n", 
-			osmo_hexdump(msgb_l2(oph->msg), msgb_l2len(oph->msg)));
-		rc = ranap_cn_rx_cl(cn_ranap_handle_cl, link, msgb_l2(oph->msg), msgb_l2len(oph->msg));
-		break;
-	default:
-		rc = -1;
-		break;
-	}
-
-	msgb_free(oph->msg);
-	return rc;
-}
-
-int iu_init(void *ctx, const char *listen_addr, uint16_t listen_port,
-	    iu_recv_cb_t iu_recv_cb)
-{
-	struct osmo_sua_user *user;
-	talloc_asn1_ctx = talloc_named_const(ctx, 1, "asn1");
-	global_iu_recv_cb = iu_recv_cb;
-	osmo_sua_set_log_area(DSUA);
-	user = osmo_sua_user_create(ctx, sccp_sap_up, ctx);
-	return osmo_sua_server_listen(user, listen_addr, listen_port);
-}
-
-/* Return an existing Iu-CS subscriber connection record for the given link and
- * connection IDs, or return NULL if not found. */
-/* TODO wrong file */
-static struct gsm_subscriber_connection *subscr_conn_lookup_iu(struct gsm_network *network,
-							       uint8_t link_id,
-							       uint32_t conn_id)
-{
-	struct gsm_subscriber_connection *conn;
-	llist_for_each_entry(conn, &network->subscr_conns, entry) {
-		if (conn->via_iface != IFACE_IUCS)
-			continue;
-		if (conn->iu.link_id != link_id)
-			continue;
-		if (conn->iu.conn_id != conn_id)
-			continue;
-		return conn;
-	}
-	return NULL;
-}
-
-/* Receive MM/CC/... message from Iu-CS (SCCP user SAP).
- * msg->dst must reference a struct ue_conn_ctx. link_id identifies the SCTP
- * peer that sent the msg.
- *
- * For A-interface see libbsc/bsc_api.c gsm0408_rcvmsg(). */
-/* TODO wrong file */
-int gsm0408_rcvmsg_iucs(struct gsm_network *network, struct msgb *msg, uint8_t link_id)
-{
-	int rc;
-	struct ue_conn_ctx *ue_ctx;
-	struct gsm_subscriber_connection *conn;
-
-	ue_ctx = (struct ue_conn_ctx*)msg->dst;
-
-	/* TODO: are there message types that could allow us to skip this
-	 * search? */
-	conn = subscr_conn_lookup_iu(network, link_id, ue_ctx->conn_id);
-
-	if (conn) {
-		/* if we already have a connection, handle DTAP.
-		   gsm0408_dispatch() is aka msc_dtap() */
-
-		/* Make sure we don't receive RR over Iu-CS; otherwise all
-		 * messages handled by gsm0408_dispatch() are of interest (CC,
-		 * MM, SMS, NS_SS, maybe even MM_GPRS and SM_GPRS). */
-		struct gsm48_hdr *gh = msgb_l3(msg);
-		uint8_t pdisc = gh->proto_discr & 0x0f;
-		OSMO_ASSERT(pdisc != GSM48_PDISC_RR);
-
-		gsm0408_dispatch(conn, msg);
-	} else {
-		/* allocate a new connection */
-
-		/* TODO */
-
-#if 0
-		rc = BSC_API_CONN_POL_REJECT;
-		conn = subscr_conn_allocate_iu(msg->lchan);
-		if (!lchan->conn) {
-			lchan_release(lchan, 1, RSL_REL_NORMAL);
-			return -1;
-		}
-
-		/* fwd via bsc_api to send COMPLETE L3 INFO to MSC */
-		rc = api->compl_l3(lchan->conn, msg, 0);
-
-		if (rc != BSC_API_CONN_POL_ACCEPT) {
-			lchan->conn->lchan = NULL;
-			subscr_con_free(lchan->conn);
-			lchan_release(lchan, 1, RSL_REL_NORMAL);
-		}
-#endif
-	}
-
-	return 0;
-}
-
-/* For A-interface see libbsc/bsc_api.c subscr_con_allocate() */
-/* TODO wrong file */
-struct gsm_subscriber_connection *subscr_conn_allocate_iu(struct gsm_bts *bts)
-	/* TODO "bts"? this is an hNodeB, really. */
-{
-	struct gsm_subscriber_connection *conn;
-
-	conn = talloc_zero(bts->network, struct gsm_subscriber_connection);
-	if (!conn)
-		return NULL;
-
-	conn->via_iface = IFACE_IUCS;
-	conn->bts = bts;
-	llist_add_tail(&conn->entry, &bts->network->subscr_conns);
-	return conn;
-}