add 'dummy cn' as a stub core netwrok element to which hnbgw connects
diff --git a/src/tests/dummy_cn_sua.c b/src/tests/dummy_cn_sua.c
new file mode 100644
index 0000000..6d8098a
--- /dev/null
+++ b/src/tests/dummy_cn_sua.c
@@ -0,0 +1,264 @@
+#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/sigtran/sua.h>
+#include <osmocom/sigtran/sccp_sap.h>
+
+#include "test_common.h"
+#include "ranap_common_cn.h"
+#include "hnbgw.h"
+
+int asn1_xer_print = 1;
+
+/***********************************************************************
+ * RANAP handling
+ ***********************************************************************/
+
+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");
+ uint8_t *cur;
+
+ ranap_parse_lai(&ra_id, &ies.lai);
+ sai = asn1str_to_u16(&ies.sai.sAC);
+ cur = msgb_put(msg, ies.nas_pdu.size);
+ memcpy(msg, ies.nas_pdu.buf, ies.nas_pdu.size);
+ /* FIXME: set msgb_gmmh() */
+
+ /* FIXME: Feed into the MM layer */
+ rc = gsm0408_gprs_rcvmsg_iu(msg, ra_id, sai, conn_id);
+
+ 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");
+ uint8_t *cur;
+
+ 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_u16(&ies.rac);
+ }
+ if (ies.presenceMask & DIRECTTRANSFERIES_RANAP_SAI_PRESENT) {
+ _sai = asn1str_to_u16(&ies.sai.sAC);
+ sai = &_sai;
+ }
+ }
+
+ cur = msgb_put(msg, ies.nas_pdu.size);
+ memcpy(msg, ies.nas_pdu.buf, ies.nas_pdu.size);
+ /* FIXME: set msgb_gmmh() */
+
+ /* FIXME: Feed into the MM/CC/SMS-CP layer */
+ rc = gsm0408_gprs_rcvmsg_iu(msg, ra_id, sai, conn_id);
+
+ 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;
+}
+
+/* Entry point for connection-oriented ANAP message */
+int cn_ranap_handle_co(void *ctx, ranap_message *message)
+{
+ int rc = 0;
+
+ 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;
+ }
+ break;
+ case RANAP_RANAP_PDU_PR_successfulOutcome:
+ switch (message->procedureCode) {
+ case RANAP_ProcedureCode_id_RAB_Assignment:
+ /* RAB Assignment Response */
+ break;
+ case RANAP_ProcedureCode_id_SecurityModeControl:
+ /* Security Mode Complete */
+ break;
+ case RANAP_ProcedureCode_id_Iu_Release:
+ /* Iu Release Complete */
+ break;
+ }
+ case RANAP_RANAP_PDU_PR_unsuccessfulOutcome:
+ case RANAP_RANAP_PDU_PR_outcome:
+ default:
+ rc = -1;
+ break;
+ }
+
+ return rc;
+}
+
+static int ranap_handle_cl_reset_req(void *ctx, RANAP_ResetIEs_t *ies)
+{
+ /* FIXME: send reset response */
+}
+
+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 */
+int cn_ranap_handle_cl(void *ctx, ranap_message *message)
+{
+ int rc = 0;
+
+ 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;
+ }
+ break;
+ case RANAP_RANAP_PDU_PR_successfulOutcome:
+ case RANAP_RANAP_PDU_PR_unsuccessfulOutcome:
+ case RANAP_RANAP_PDU_PR_outcome:
+ default:
+ rc = -1;
+ break;
+ }
+}
+
+/***********************************************************************
+ *
+ ***********************************************************************/
+
+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;
+ const uint8_t payload[] = { 0xb1, 0xb2, 0xb3 };
+ int rc;
+ void *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 */
+ 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(DMAIN, LOGL_NOTICE, "Received invalid N-CONNECT.ind\n");
+ return 0;
+ }
+ /* FIXME: allocate UE context */
+ /* 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 = cn_ranap_rx_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);
+ 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)));
+ /* FIXME: resolve UE context */
+ rc = cn_ranap_rx_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 = cn_ranap_rx_cl(link, msgb_l2(oph->msg), msgb_l2len(oph->msg));
+ break;
+ }
+
+ msgb_free(oph->msg);
+ return 0;
+}
+
+int main(int argc, char **argv)
+{
+ struct osmo_sua_user *user;
+ void *ctx = talloc_named_const(NULL, 1, "root");
+ int rc;
+
+ osmo_sua_set_log_area(DSUA);
+
+ test_common_init();
+
+ user = osmo_sua_user_create(ctx, sccp_sap_up);
+
+ rc = osmo_sua_server_listen(user, "127.0.0.1", 14001);
+ if (rc < 0) {
+ exit(1);
+ }
+
+ while (1) {
+ osmo_select_main(0);
+ }
+}