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-rw-r--r--src/libiu/iu.c768
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diff --git a/src/libiu/iu.c b/src/libiu/iu.c
deleted file mode 100644
index 1bb53058..00000000
--- a/src/libiu/iu.c
+++ /dev/null
@@ -1,768 +0,0 @@
-/* Common parts of IuCS and IuPS interfaces implementation */
-
-/* (C) 2016 by sysmocom s.f.m.c. GmbH <info@sysmocom.de>
- * All Rights Reserved
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as published by
- * the Free Software Foundation; either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- *
- */
-
-#include <stdint.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#include <stdbool.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/core/utils.h>
-#include <osmocom/vty/logging.h>
-
-#include <osmocom/gsm/gsm48.h>
-#include <osmocom/gprs/gprs_msgb.h>
-
-#include <osmocom/sigtran/osmo_ss7.h>
-#include <osmocom/sigtran/sccp_sap.h>
-#include <osmocom/sigtran/sccp_helpers.h>
-#include <osmocom/sigtran/protocol/m3ua.h>
-
-#include <openbsc/gprs_sgsn.h>
-#include <openbsc/iu.h>
-#include <openbsc/debug.h>
-
-#include <pdp.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>
-
-/* Parsed global RNC id. See also struct RANAP_GlobalRNC_ID, and note that the
- * PLMN identity is a BCD representation of the MCC and MNC.
- * See iu_grnc_id_parse(). */
-struct iu_grnc_id {
- uint16_t mcc;
- uint16_t mnc;
- uint16_t rnc_id;
-};
-
-/* A remote RNC (Radio Network Controller, like BSC but for UMTS) that has
- * called us and is currently reachable at the given osmo_sccp_addr. So, when we
- * know a LAC for a subscriber, we can page it at the RNC matching that LAC or
- * RAC. An HNB-GW typically presents itself as if it were a single RNC, even
- * though it may have several RNCs in hNodeBs connected to it. Those will then
- * share the same RNC id, which they actually receive and adopt from the HNB-GW
- * in the HNBAP HNB REGISTER ACCEPT message. */
-struct iu_rnc {
- struct llist_head entry;
-
- uint16_t rnc_id;
- uint16_t lac; /* Location Area Code (used for CS and PS) */
- uint8_t rac; /* Routing Area Code (used for PS only) */
- struct osmo_sccp_addr sccp_addr;
-};
-
-void *talloc_iu_ctx;
-
-/* Implement the extern asn_debug from libasn1c to indicate whether to print
- * asn.1 debug messages (see libasn1c). */
-int asn_debug = 0;
-
-/* Implement the extern asn1_xer_print to indicate whether the ASN.1 binary
- * code decoded and encoded during Iu communication should be logged to stderr
- * (see asn.1 generated code in osmo-iuh). */
-int asn1_xer_print = 0;
-
-void *talloc_asn1_ctx;
-
-iu_recv_cb_t global_iu_recv_cb = NULL;
-iu_event_cb_t global_iu_event_cb = NULL;
-
-static LLIST_HEAD(ue_conn_ctx_list);
-static LLIST_HEAD(rnc_list);
-
-static struct osmo_sccp_instance *g_sccp;
-static struct osmo_sccp_user *g_scu;
-
-const struct value_string iu_event_type_names[] = {
- OSMO_VALUE_STRING(IU_EVENT_RAB_ASSIGN),
- OSMO_VALUE_STRING(IU_EVENT_SECURITY_MODE_COMPLETE),
- OSMO_VALUE_STRING(IU_EVENT_IU_RELEASE),
- OSMO_VALUE_STRING(IU_EVENT_LINK_INVALIDATED),
- { 0, NULL }
-};
-
-struct ue_conn_ctx *ue_conn_ctx_alloc(struct osmo_sccp_addr *addr, uint32_t conn_id)
-{
- struct ue_conn_ctx *ctx = talloc_zero(talloc_iu_ctx, struct ue_conn_ctx);
-
- ctx->sccp_addr = *addr;
- ctx->conn_id = conn_id;
- llist_add(&ctx->list, &ue_conn_ctx_list);
-
- return ctx;
-}
-
-struct ue_conn_ctx *ue_conn_ctx_find(uint32_t conn_id)
-{
- struct ue_conn_ctx *ctx;
-
- llist_for_each_entry(ctx, &ue_conn_ctx_list, list) {
- if (ctx->conn_id == conn_id)
- return ctx;
- }
- return NULL;
-}
-
-static struct iu_rnc *iu_rnc_alloc(uint16_t rnc_id, uint16_t lac, uint8_t rac,
- struct osmo_sccp_addr *addr)
-{
- struct iu_rnc *rnc = talloc_zero(talloc_iu_ctx, struct iu_rnc);
-
- rnc->rnc_id = rnc_id;
- rnc->lac = lac;
- rnc->rac = rac;
- rnc->sccp_addr = *addr;
- llist_add(&rnc->entry, &rnc_list);
-
- LOGP(DRANAP, LOGL_NOTICE, "New RNC %d (LAC=%d RAC=%d)\n",
- rnc->rnc_id, rnc->lac, rnc->rac);
-
- return rnc;
-}
-
-static struct iu_rnc *iu_rnc_register(uint16_t rnc_id, uint16_t lac,
- uint8_t rac, struct osmo_sccp_addr *addr)
-{
- struct iu_rnc *rnc;
- llist_for_each_entry(rnc, &rnc_list, entry) {
- if (rnc->rnc_id != rnc_id)
- continue;
-
- /* We have this RNC Id registered already. Make sure that the
- * details match. */
-
- /* TODO should a mismatch be an error? */
- if (rnc->lac != lac || rnc->rac != rac)
- LOGP(DRANAP, LOGL_NOTICE, "RNC %d changes its details:"
- " LAC=%d RAC=%d --> LAC=%d RAC=%d\n",
- rnc->rnc_id, rnc->lac, rnc->rac,
- lac, rac);
- rnc->lac = lac;
- rnc->rac = rac;
-
- if (addr && memcmp(&rnc->sccp_addr, addr, sizeof(*addr)))
- LOGP(DRANAP, LOGL_NOTICE, "RNC %d on New SCCP Addr %s"
- " (LAC=%d RAC=%d)\n",
- rnc->rnc_id, osmo_sccp_addr_dump(addr), rnc->lac, rnc->rac);
- rnc->sccp_addr = *addr;
- return rnc;
- }
-
- /* Not found, make a new one. */
- return iu_rnc_alloc(rnc_id, lac, rac, addr);
-}
-
-/***********************************************************************
- * RANAP handling
- ***********************************************************************/
-
-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_sccp_user_sap_down(g_scu, &prim->oph);
-}
-
-int iu_rab_deact(struct ue_conn_ctx *ue_ctx, uint8_t rab_id)
-{
- /* FIXME */
- return -1;
-}
-
-int iu_tx_sec_mode_cmd(struct ue_conn_ctx *uectx, struct gsm_auth_tuple *tp,
- int send_ck, int new_key)
-{
- struct osmo_scu_prim *prim;
- struct msgb *msg;
-
- /* create RANAP message */
- msg = ranap_new_msg_sec_mod_cmd(tp->vec.ik, send_ck? tp->vec.ck : NULL,
- new_key ? RANAP_KeyStatus_new : RANAP_KeyStatus_old);
- 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_sccp_user_sap_down(g_scu, &prim->oph);
-
- return 0;
-}
-
-int iu_tx_common_id(struct ue_conn_ctx *uectx, const char *imsi)
-{
- struct msgb *msg;
- struct osmo_scu_prim *prim;
-
- LOGP(DRANAP, LOGL_INFO, "Transmitting RANAP CommonID (SCCP conn_id %u)\n",
- uectx->conn_id);
-
- msg = ranap_new_msg_common_id(imsi);
- 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_sccp_user_sap_down(g_scu, &prim->oph);
- return 0;
-}
-
-static int iu_grnc_id_parse(struct iu_grnc_id *dst,
- struct RANAP_GlobalRNC_ID *src)
-{
- /* The size is coming from arbitrary sender, check it gracefully */
- if (src->pLMNidentity.size != 3) {
- LOGP(DRANAP, LOGL_ERROR, "Invalid PLMN Identity size:"
- " should be 3, is %d\n", src->pLMNidentity.size);
- return -1;
- }
- gsm48_mcc_mnc_from_bcd(&src->pLMNidentity.buf[0],
- &dst->mcc, &dst->mnc);
- dst->rnc_id = (uint16_t)src->rNC_ID;
- return 0;
-}
-
-#if 0
- -- not used at present --
-static int iu_grnc_id_compose(struct iu_grnc_id *src,
- struct RANAP_GlobalRNC_ID *dst)
-{
- /* The caller must ensure proper size */
- OSMO_ASSERT(dst->pLMNidentity.size == 3);
- gsm48_mcc_mnc_to_bcd(&dst->pLMNidentity.buf[0],
- src->mcc, src->mnc);
- dst->rNC_ID = src->rnc_id;
- return 0;
-}
-#endif
-
-static int ranap_handle_co_initial_ue(void *ctx, RANAP_InitialUE_MessageIEs_t *ies)
-{
- struct ue_conn_ctx *ue_conn = ctx;
- struct gprs_ra_id ra_id;
- struct iu_grnc_id grnc_id;
- uint16_t sai;
- struct msgb *msg = msgb_alloc(256, "RANAP->NAS");
-
- if (ranap_parse_lai(&ra_id, &ies->lai) != 0) {
- LOGP(DRANAP, LOGL_ERROR, "Failed to parse RANAP LAI IE\n");
- return -1;
- }
-
- if (ies->presenceMask & INITIALUE_MESSAGEIES_RANAP_RAC_PRESENT) {
- ra_id.rac = asn1str_to_u8(&ies->rac);
- }
-
- if (iu_grnc_id_parse(&grnc_id, &ies->globalRNC_ID) != 0) {
- LOGP(DRANAP, LOGL_ERROR,
- "Failed to parse RANAP Global-RNC-ID IE\n");
- return -1;
- }
-
- 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);
-
- /* Make sure we know the RNC Id and LAC+RAC coming in on this connection. */
- iu_rnc_register(grnc_id.rnc_id, ra_id.lac, ra_id.rac, &ue_conn->sccp_addr);
- ue_conn->ra_id = ra_id;
-
- /* Feed into the MM layer */
- msg->dst = ctx;
- global_iu_recv_cb(msg, &ra_id, &sai);
-
- msgb_free(msg);
-
- 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) {
- if (ranap_parse_lai(&_ra_id, &ies->lai) != 0) {
- LOGP(DRANAP, LOGL_ERROR, "Failed to parse RANAP LAI IE\n");
- return -1;
- }
- 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);
-
- msgb_free(msg);
-
- 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_nas, uint8_t sapi)
-{
- struct ue_conn_ctx *uectx = msg_nas->dst;
- struct msgb *msg;
- struct osmo_scu_prim *prim;
-
- LOGP(DRANAP, LOGL_INFO, "Transmitting L3 Message as RANAP DT (SCCP conn_id %u)\n",
- uectx->conn_id);
-
- msg = ranap_new_msg_dt(sapi, msg_nas->data, msgb_length(msg_nas));
- msgb_free(msg_nas);
- 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_sccp_user_sap_down(g_scu, &prim->oph);
- return 0;
-}
-
-/* Send Iu Release for the given UE connection.
- * If cause is NULL, the standard "No remaining RAB" cause is sent, otherwise
- * the provided cause. */
-int iu_tx_release(struct ue_conn_ctx *ctx, const struct RANAP_Cause *cause)
-{
- struct msgb *msg;
- struct osmo_scu_prim *prim;
- static const struct RANAP_Cause default_cause = {
- .present = RANAP_Cause_PR_radioNetwork,
- .choice.radioNetwork = RANAP_CauseRadioNetwork_no_remaining_rab,
- };
-
- if (!cause)
- cause = &default_cause;
-
- msg = ranap_new_msg_iu_rel_cmd(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);
- return osmo_sccp_user_sap_down(g_scu, &prim->oph);
-}
-
-static int ranap_handle_co_iu_rel_req(struct ue_conn_ctx *ctx, RANAP_Iu_ReleaseRequestIEs_t *ies)
-{
- LOGP(DRANAP, LOGL_INFO, "Received Iu Release Request, Sending Release Command\n");
- iu_tx_release(ctx, &ies->cause);
- return 0;
-}
-
-static int ranap_handle_co_rab_ass_resp(struct ue_conn_ctx *ctx, RANAP_RAB_AssignmentResponseIEs_t *ies)
-{
- int rc = -1;
-
- LOGP(DRANAP, LOGL_INFO,
- "Rx RAB Assignment Response for UE conn_id %u\n", ctx->conn_id);
- if (ies->presenceMask & RAB_ASSIGNMENTRESPONSEIES_RANAP_RAB_SETUPORMODIFIEDLIST_PRESENT) {
- /* TODO: Iterate over list of SetupOrModifiedList IEs and handle each one */
- RANAP_IE_t *ranap_ie = ies->raB_SetupOrModifiedList.raB_SetupOrModifiedList_ies.list.array[0];
- RANAP_RAB_SetupOrModifiedItemIEs_t setup_ies;
-
- rc = ranap_decode_rab_setupormodifieditemies_fromlist(&setup_ies, &ranap_ie->value);
- if (rc) {
- LOGP(DRANAP, LOGL_ERROR, "Error in ranap_decode_rab_setupormodifieditemies()\n");
- return rc;
- }
-
- rc = global_iu_event_cb(ctx, IU_EVENT_RAB_ASSIGN, &setup_ies);
-
- ranap_free_rab_setupormodifieditemies(&setup_ies);
- }
- /* FIXME: handle RAB Ass failure? */
-
- 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:
- LOGP(DRANAP, LOGL_ERROR, "Received Initiating Message: unknown Procedure Code %d\n",
- message->procedureCode);
- rc = -1;
- break;
- }
- break;
- case RANAP_RANAP_PDU_PR_successfulOutcome:
- switch (message->procedureCode) {
- case RANAP_ProcedureCode_id_SecurityModeControl:
- /* Security Mode Complete */
- rc = global_iu_event_cb(ctx, IU_EVENT_SECURITY_MODE_COMPLETE, NULL);
- break;
- case RANAP_ProcedureCode_id_Iu_Release:
- /* Iu Release Complete */
- rc = global_iu_event_cb(ctx, IU_EVENT_IU_RELEASE, NULL);
- if (rc) {
- LOGP(DRANAP, LOGL_ERROR, "Iu Release event: Iu Event callback returned %d\n",
- rc);
- }
- break;
- default:
- LOGP(DRANAP, LOGL_ERROR, "Received Successful Outcome: unknown Procedure Code %d\n",
- message->procedureCode);
- rc = -1;
- break;
- }
- break;
- case RANAP_RANAP_PDU_PR_outcome:
- 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;
- default:
- LOGP(DRANAP, LOGL_ERROR, "Received Outcome: unknown Procedure Code %d\n",
- message->procedureCode);
- rc = -1;
- break;
- }
- break;
- case RANAP_RANAP_PDU_PR_unsuccessfulOutcome:
- default:
- LOGP(DRANAP, LOGL_ERROR, "Received Unsuccessful Outcome: Procedure Code %d\n",
- message->procedureCode);
- 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? */
- }
-}
-
-/***********************************************************************
- * Paging
- ***********************************************************************/
-
-struct osmo_sccp_addr local_sccp_addr = {
- .presence = OSMO_SCCP_ADDR_T_SSN | OSMO_SCCP_ADDR_T_PC,
- .ri = OSMO_SCCP_RI_SSN_PC,
- .ssn = OSMO_SCCP_SSN_RANAP,
- .pc = 1,
-};
-
-/* Send a paging command down a given SCCP User. tmsi and paging_cause are
- * optional and may be passed NULL and 0, respectively, to disable their use.
- * See enum RANAP_PagingCause.
- *
- * If TMSI is given, the IMSI is not sent over the air interface. Nevertheless,
- * the IMSI is still required for resolution in the HNB-GW and/or(?) RNC. */
-static int iu_tx_paging_cmd(struct osmo_sccp_addr *called_addr,
- const char *imsi, const uint32_t *tmsi,
- bool is_ps, uint32_t paging_cause)
-{
- struct msgb *msg;
- msg = ranap_new_msg_paging_cmd(imsi, tmsi, is_ps? 1 : 0, paging_cause);
- msg->l2h = msg->data;
- osmo_sccp_tx_unitdata_msg(g_scu, &local_sccp_addr, called_addr, msg);
- return 0;
-}
-
-static int iu_page(const char *imsi, const uint32_t *tmsi_or_ptimsi,
- uint16_t lac, uint8_t rac, bool is_ps)
-{
- struct iu_rnc *rnc;
- int pagings_sent = 0;
-
- if (tmsi_or_ptimsi) {
- LOGP(DRANAP, LOGL_DEBUG, "%s: Looking for RNCs to page for IMSI %s"
- " (paging will use %s %x)\n",
- is_ps? "IuPS" : "IuCS",
- imsi,
- is_ps? "PTMSI" : "TMSI",
- *tmsi_or_ptimsi);
- } else {
- LOGP(DRANAP, LOGL_DEBUG, "%s: Looking for RNCs to page for IMSI %s"
- " (paging will use IMSI)\n",
- is_ps? "IuPS" : "IuCS",
- imsi
- );
- }
-
- llist_for_each_entry(rnc, &rnc_list, entry) {
- if (rnc->lac != lac)
- continue;
- if (is_ps && rnc->rac != rac)
- continue;
-
- /* Found a match! */
- if (iu_tx_paging_cmd(&rnc->sccp_addr, imsi, tmsi_or_ptimsi, is_ps, 0)
- == 0) {
- LOGP(DRANAP, LOGL_DEBUG,
- "%s: Paged for IMSI %s on RNC %d, on SCCP addr %s\n",
- is_ps? "IuPS" : "IuCS",
- imsi, rnc->rnc_id, osmo_sccp_addr_dump(&rnc->sccp_addr));
- pagings_sent ++;
- }
- }
-
- /* Some logging... */
- if (pagings_sent > 0) {
- LOGP(DRANAP, LOGL_DEBUG,
- "%s: %d RNCs were paged for IMSI %s.\n",
- is_ps? "IuPS" : "IuCS",
- pagings_sent, imsi);
- }
- else {
- if (is_ps) {
- LOGP(DRANAP, LOGL_ERROR, "IuPS: Found no RNC to page for"
- " LAC %d RAC %d (would have paged IMSI %s)\n",
- lac, rac, imsi);
- }
- else {
- LOGP(DRANAP, LOGL_ERROR, "IuCS: Found no RNC to page for"
- " LAC %d (would have paged IMSI %s)\n",
- lac, imsi);
- }
- }
-
- return pagings_sent;
-}
-
-int iu_page_cs(const char *imsi, const uint32_t *tmsi, uint16_t lac)
-{
- return iu_page(imsi, tmsi, lac, 0, false);
-}
-
-int iu_page_ps(const char *imsi, const uint32_t *ptmsi, uint16_t lac, uint8_t rac)
-{
- return iu_page(imsi, ptmsi, lac, rac, true);
-}
-
-
-/***********************************************************************
- *
- ***********************************************************************/
-
-int tx_unitdata(struct osmo_sccp_user *scu);
-int tx_conn_req(struct osmo_sccp_user *scu, 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 *_scu)
-{
- struct osmo_sccp_user *scu = _scu;
- struct osmo_scu_prim *prim = (struct osmo_scu_prim *) oph;
- struct osmo_prim_hdr *resp = NULL;
- int rc;
- struct ue_conn_ctx *ue;
-
- DEBUGP(DRANAP, "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*/
- DEBUGP(DRANAP, "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(DRANAP, LOGL_NOTICE,
- "Received invalid N-CONNECT.ind\n");
- return 0;
- }
- ue = ue_conn_ctx_alloc(&prim->u.connect.calling_addr, prim->u.connect.conn_id);
- /* first ensure the local SCCP socket is ACTIVE */
- resp = make_conn_resp(&prim->u.connect);
- osmo_sccp_user_sap_down(scu, 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 */
- DEBUGP(DRANAP, "N-DISCONNECT.ind(%u)\n",
- prim->u.disconnect.conn_id);
- ue = ue_conn_ctx_find(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 */
- DEBUGP(DRANAP, "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(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-less data received */
- DEBUGP(DRANAP, "N-UNITDATA.ind(%s)\n",
- osmo_hexdump(msgb_l2(oph->msg), msgb_l2len(oph->msg)));
- rc = ranap_cn_rx_cl(cn_ranap_handle_cl, scu, msgb_l2(oph->msg), msgb_l2len(oph->msg));
- break;
- default:
- rc = -1;
- break;
- }
-
- msgb_free(oph->msg);
- return rc;
-}
-
-int iu_init(void *ctx, struct osmo_sccp_instance *sccp,
- iu_recv_cb_t iu_recv_cb, iu_event_cb_t iu_event_cb)
-{
- talloc_iu_ctx = talloc_named_const(ctx, 1, "iu");
- talloc_asn1_ctx = talloc_named_const(talloc_iu_ctx, 1, "asn1");
-
- global_iu_recv_cb = iu_recv_cb;
- global_iu_event_cb = iu_event_cb;
- g_sccp = sccp;
- g_scu = osmo_sccp_user_bind(g_sccp, "OsmoMSC-Iu", sccp_sap_up, OSMO_SCCP_SSN_RANAP);
-
- return 0;
-}
-