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-rw-r--r--src/hnbgw_cn.c560
1 files changed, 0 insertions, 560 deletions
diff --git a/src/hnbgw_cn.c b/src/hnbgw_cn.c
deleted file mode 100644
index 0623561..0000000
--- a/src/hnbgw_cn.c
+++ /dev/null
@@ -1,560 +0,0 @@
-/* IuCS/IuPS Core Network interface of HNB-GW */
-
-/* (C) 2015 by Harald Welte <laforge@gnumonks.org>
- * 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 <arpa/inet.h>
-#include <errno.h>
-
-#include <osmocom/core/msgb.h>
-#include <osmocom/core/utils.h>
-#include <osmocom/core/timer.h>
-
-#include <osmocom/sigtran/protocol/m3ua.h>
-#include <osmocom/sigtran/sccp_sap.h>
-#include <osmocom/sigtran/sccp_helpers.h>
-
-#include <osmocom/iuh/hnbgw.h>
-#include <osmocom/iuh/hnbgw_rua.h>
-#include <osmocom/ranap/ranap_ies_defs.h>
-#include <osmocom/ranap/ranap_msg_factory.h>
-#include <osmocom/iuh/context_map.h>
-#include <osmocom/hnbap/CN-DomainIndicator.h>
-
-/***********************************************************************
- * Outbound RANAP RESET to CN
- ***********************************************************************/
-
-void hnbgw_cnlink_change_state(struct hnbgw_cnlink *cnlink, enum hnbgw_cnlink_state state);
-
-static int transmit_rst(struct hnb_gw *gw, RANAP_CN_DomainIndicator_t domain,
- struct osmo_sccp_addr *remote_addr)
-{
- struct msgb *msg;
- RANAP_Cause_t cause = {
- .present = RANAP_Cause_PR_transmissionNetwork,
- .choice. transmissionNetwork = RANAP_CauseTransmissionNetwork_signalling_transport_resource_failure,
- };
-
- LOGP(DRANAP, LOGL_NOTICE, "Tx RESET to %s %s\n",
- domain == CN_DomainIndicator_cs_domain ? "IuCS" : "IuPS",
- osmo_sccp_inst_addr_name(gw->sccp.cnlink->sccp, remote_addr));
-
- msg = ranap_new_msg_reset(domain, &cause);
-
- return osmo_sccp_tx_unitdata_msg(gw->sccp.cnlink->sccp_user,
- &gw->sccp.local_addr,
- remote_addr,
- msg);
-}
-
-static int transmit_reset_ack(struct hnb_gw *gw, RANAP_CN_DomainIndicator_t domain,
- const struct osmo_sccp_addr *remote_addr)
-{
- struct msgb *msg;
-
- LOGP(DRANAP, LOGL_NOTICE, "Tx RESET ACK to %s %s\n",
- domain == CN_DomainIndicator_cs_domain ? "IuCS" : "IuPS",
- osmo_sccp_inst_addr_name(gw->sccp.cnlink->sccp, remote_addr));
-
- msg = ranap_new_msg_reset_ack(domain, NULL);
-
- return osmo_sccp_tx_unitdata_msg(gw->sccp.cnlink->sccp_user,
- &gw->sccp.local_addr,
- remote_addr,
- msg);
-}
-
-/* Timer callback once T_RafC expires */
-static void cnlink_trafc_cb(void *data)
-{
- struct hnb_gw *gw = data;
-
- transmit_rst(gw, RANAP_CN_DomainIndicator_cs_domain, &gw->sccp.iucs_remote_addr);
- transmit_rst(gw, RANAP_CN_DomainIndicator_ps_domain, &gw->sccp.iups_remote_addr);
- hnbgw_cnlink_change_state(gw->sccp.cnlink, CNLINK_S_EST_RST_TX_WAIT_ACK);
- /* The spec states that we should abandon after a configurable
- * number of times. We decide to simply continue trying */
-}
-
-/* change the state of a CN Link */
-void hnbgw_cnlink_change_state(struct hnbgw_cnlink *cnlink, enum hnbgw_cnlink_state state)
-{
- switch (state) {
- case CNLINK_S_NULL:
- case CNLINK_S_EST_PEND:
- break;
- case CNLINK_S_EST_CONF:
- cnlink_trafc_cb(cnlink->gw);
- break;
- case CNLINK_S_EST_RST_TX_WAIT_ACK:
- osmo_timer_schedule(&cnlink->T_RafC, 5, 0);
- break;
- case CNLINK_S_EST_ACTIVE:
- osmo_timer_del(&cnlink->T_RafC);
- break;
- }
-}
-
-/***********************************************************************
- * Incoming primitives from SCCP User SAP
- ***********************************************************************/
-
-static int cn_ranap_rx_reset_cmd(struct hnbgw_cnlink *cnlink,
- const struct osmo_scu_unitdata_param *unitdata,
- RANAP_InitiatingMessage_t *imsg)
-{
- CN_DomainIndicator_t domain;
- RANAP_ResetIEs_t ies;
- int rc;
-
- rc = ranap_decode_reseties(&ies, &imsg->value);
- domain = ies.cN_DomainIndicator;
- ranap_free_reseties(&ies);
-
- LOGP(DRANAP, LOGL_NOTICE, "Rx RESET from %s %s, returning ACK\n",
- domain == CN_DomainIndicator_cs_domain ? "IuCS" : "IuPS",
- osmo_sccp_inst_addr_name(cnlink->sccp, &unitdata->calling_addr));
-
- /* FIXME: actually reset connections, if any */
-
- if (transmit_reset_ack(cnlink->gw, domain, &unitdata->calling_addr))
- LOGP(DRANAP, LOGL_ERROR, "Error: cannot send RESET ACK to %s %s\n",
- domain == CN_DomainIndicator_cs_domain ? "IuCS" : "IuPS",
- osmo_sccp_inst_addr_name(cnlink->sccp, &unitdata->calling_addr));
-
- return rc;
-}
-
-static int cn_ranap_rx_reset_ack(struct hnbgw_cnlink *cnlink,
- RANAP_SuccessfulOutcome_t *omsg)
-{
- RANAP_ResetAcknowledgeIEs_t ies;
- int rc;
-
- rc = ranap_decode_resetacknowledgeies(&ies, &omsg->value);
-
- hnbgw_cnlink_change_state(cnlink, CNLINK_S_EST_ACTIVE);
-
- ranap_free_resetacknowledgeies(&ies);
- return rc;
-}
-
-static int cn_ranap_rx_paging_cmd(struct hnbgw_cnlink *cnlink,
- RANAP_InitiatingMessage_t *imsg,
- const uint8_t *data, unsigned int len)
-{
- struct hnb_gw *gw = cnlink->gw;
- struct hnb_context *hnb;
- RANAP_PagingIEs_t ies;
- int rc;
-
- rc = ranap_decode_pagingies(&ies, &imsg->value);
- if (rc < 0)
- return rc;
-
- /* FIXME: determine which HNBs to send this Paging command,
- * rather than broadcasting to all HNBs */
- llist_for_each_entry(hnb, &gw->hnb_list, list) {
- rc = rua_tx_udt(hnb, data, len);
- }
-
- ranap_free_pagingies(&ies);
- return 0;
-}
-
-static int cn_ranap_rx_initiating_msg(struct hnbgw_cnlink *cnlink,
- const struct osmo_scu_unitdata_param *unitdata,
- RANAP_InitiatingMessage_t *imsg,
- const uint8_t *data, unsigned int len)
-{
- switch (imsg->procedureCode) {
- case RANAP_ProcedureCode_id_Reset:
- return cn_ranap_rx_reset_cmd(cnlink, unitdata, imsg);
- case RANAP_ProcedureCode_id_Paging:
- return cn_ranap_rx_paging_cmd(cnlink, imsg, data, len);
- case RANAP_ProcedureCode_id_OverloadControl: /* Overload ind */
- break;
- case RANAP_ProcedureCode_id_ErrorIndication: /* Error ind */
- break;
- case RANAP_ProcedureCode_id_ResetResource: /* request */
- case RANAP_ProcedureCode_id_InformationTransfer:
- case RANAP_ProcedureCode_id_DirectInformationTransfer:
- case RANAP_ProcedureCode_id_UplinkInformationExchange:
- LOGP(DRANAP, LOGL_NOTICE, "Received unsupported RANAP "
- "Procedure %ld from CN, ignoring\n", imsg->procedureCode);
- break;
- default:
- LOGP(DRANAP, LOGL_NOTICE, "Received suspicious RANAP "
- "Procedure %ld from CN, ignoring\n", imsg->procedureCode);
- break;
- }
- return 0;
-}
-
-static int cn_ranap_rx_successful_msg(struct hnbgw_cnlink *cnlink,
- RANAP_SuccessfulOutcome_t *omsg)
-{
- switch (omsg->procedureCode) {
- case RANAP_ProcedureCode_id_Reset: /* Reset acknowledge */
- return cn_ranap_rx_reset_ack(cnlink, omsg);
- case RANAP_ProcedureCode_id_ResetResource: /* response */
- case RANAP_ProcedureCode_id_InformationTransfer:
- case RANAP_ProcedureCode_id_DirectInformationTransfer:
- case RANAP_ProcedureCode_id_UplinkInformationExchange:
- LOGP(DRANAP, LOGL_NOTICE, "Received unsupported RANAP "
- "Procedure %ld from CN, ignoring\n", omsg->procedureCode);
- break;
- default:
- LOGP(DRANAP, LOGL_NOTICE, "Received suspicious RANAP "
- "Procedure %ld from CN, ignoring\n", omsg->procedureCode);
- break;
- }
- return 0;
-}
-
-
-static int _cn_ranap_rx(struct hnbgw_cnlink *cnlink,
- const struct osmo_scu_unitdata_param *unitdata,
- RANAP_RANAP_PDU_t *pdu, const uint8_t *data, unsigned int len)
-{
- int rc;
-
- switch (pdu->present) {
- case RANAP_RANAP_PDU_PR_initiatingMessage:
- rc = cn_ranap_rx_initiating_msg(cnlink, unitdata, &pdu->choice.initiatingMessage,
- data, len);
- break;
- case RANAP_RANAP_PDU_PR_successfulOutcome:
- rc = cn_ranap_rx_successful_msg(cnlink, &pdu->choice.successfulOutcome);
- break;
- case RANAP_RANAP_PDU_PR_unsuccessfulOutcome:
- LOGP(DRANAP, LOGL_NOTICE, "Received unsupported RANAP "
- "unsuccessful outcome procedure %ld from CN, ignoring\n",
- pdu->choice.unsuccessfulOutcome.procedureCode);
- rc = -ENOTSUP;
- break;
- default:
- LOGP(DRANAP, LOGL_NOTICE, "Received suspicious RANAP "
- "presence %u from CN, ignoring\n", pdu->present);
- rc = -EINVAL;
- break;
- }
-
- return rc;
-}
-
-static int handle_cn_ranap(struct hnbgw_cnlink *cnlink, const struct osmo_scu_unitdata_param *unitdata,
- const uint8_t *data, unsigned int len)
-{
- RANAP_RANAP_PDU_t _pdu, *pdu = &_pdu;
- asn_dec_rval_t dec_ret;
- int rc;
-
- memset(pdu, 0, sizeof(*pdu));
- dec_ret = aper_decode(NULL,&asn_DEF_RANAP_RANAP_PDU, (void **) &pdu,
- data, len, 0, 0);
- if (dec_ret.code != RC_OK) {
- LOGP(DRANAP, LOGL_ERROR, "Error in RANAP ASN.1 decode\n");
- return -1;
- }
-
- rc = _cn_ranap_rx(cnlink, unitdata, pdu, data, len);
-
- return rc;
-}
-
-static bool pc_and_ssn_match(const struct osmo_sccp_addr *a, const struct osmo_sccp_addr *b)
-{
- return (a == b)
- || ((a->pc == b->pc)
- && (a->ssn == b->ssn));
-}
-
-static int classify_cn_remote_addr(const struct hnb_gw *gw,
- const struct osmo_sccp_addr *cn_remote_addr,
- bool *is_ps)
-{
- if (pc_and_ssn_match(cn_remote_addr, &gw->sccp.iucs_remote_addr)) {
- if (is_ps)
- *is_ps = false;
- return 0;
- }
- if (pc_and_ssn_match(cn_remote_addr, &gw->sccp.iups_remote_addr)) {
- if (is_ps)
- *is_ps = true;
- return 0;
- }
- LOGP(DMAIN, LOGL_ERROR, "Unexpected remote address, matches neither CS nor PS address: %s\n",
- osmo_sccp_addr_dump(cn_remote_addr));
- return -1;
-}
-
-static int handle_cn_unitdata(struct hnbgw_cnlink *cnlink,
- const struct osmo_scu_unitdata_param *param,
- struct osmo_prim_hdr *oph)
-{
- if (param->called_addr.ssn != OSMO_SCCP_SSN_RANAP) {
- LOGP(DMAIN, LOGL_NOTICE, "N-UNITDATA.ind for unknown SSN %u\n",
- param->called_addr.ssn);
- return -1;
- }
-
- if (classify_cn_remote_addr(cnlink->gw, &param->calling_addr, NULL) < 0)
- return -1;
-
- return handle_cn_ranap(cnlink, param, msgb_l2(oph->msg), msgb_l2len(oph->msg));
-}
-
-static int handle_cn_conn_conf(struct hnbgw_cnlink *cnlink,
- const struct osmo_scu_connect_param *param,
- struct osmo_prim_hdr *oph)
-{
- /* we don't actually need to do anything, as RUA towards the HNB
- * doesn't seem to know any confirmations to its CONNECT
- * operation */
-
- LOGP(DMAIN, LOGL_DEBUG, "handle_cn_conn_conf() conn_id=%d\n",
- param->conn_id);
- LOGP(DMAIN, LOGL_DEBUG, "handle_cn_conn_conf() called_addr=%s\n",
- inet_ntoa(param->called_addr.ip.v4));
- LOGP(DMAIN, LOGL_DEBUG, "handle_cn_conn_conf() calling_addr=%s\n",
- inet_ntoa(param->calling_addr.ip.v4));
- LOGP(DMAIN, LOGL_DEBUG, "handle_cn_conn_conf() responding_addr=%s\n",
- inet_ntoa(param->responding_addr.ip.v4));
-
- return 0;
-}
-
-static int handle_cn_data_ind(struct hnbgw_cnlink *cnlink,
- const struct osmo_scu_data_param *param,
- struct osmo_prim_hdr *oph)
-{
- struct hnbgw_context_map *map;
-
- /* connection-oriented data is always passed transparently
- * towards the specific HNB, via a RUA connection identified by
- * conn_id */
-
- map = context_map_by_cn(cnlink, param->conn_id);
- if (!map) {
- /* FIXME: Return an error / released primitive */
- return 0;
- }
-
- return rua_tx_dt(map->hnb_ctx, map->is_ps, map->rua_ctx_id,
- msgb_l2(oph->msg), msgb_l2len(oph->msg));
-}
-
-static int handle_cn_disc_ind(struct hnbgw_cnlink *cnlink,
- const struct osmo_scu_disconn_param *param,
- struct osmo_prim_hdr *oph)
-{
- struct hnbgw_context_map *map;
-
- LOGP(DMAIN, LOGL_DEBUG, "handle_cn_disc_ind() conn_id=%d originator=%d\n",
- param->conn_id, param->originator);
- LOGP(DMAIN, LOGL_DEBUG, "handle_cn_disc_ind() responding_addr=%s\n",
- inet_ntoa(param->responding_addr.ip.v4));
-
- RUA_Cause_t rua_cause = {
- .present = RUA_Cause_PR_NOTHING,
- /* FIXME: Convert incoming SCCP cause to RUA cause */
- };
-
- /* we need to notify the HNB associated with this connection via
- * a RUA DISCONNECT */
-
- map = context_map_by_cn(cnlink, param->conn_id);
- if (!map) {
- /* FIXME: Return an error / released primitive */
- return 0;
- }
-
- return rua_tx_disc(map->hnb_ctx, map->is_ps, map->rua_ctx_id,
- &rua_cause, msgb_l2(oph->msg), msgb_l2len(oph->msg));
-}
-
-/* Entry point for primitives coming up from SCCP User SAP */
-static int sccp_sap_up(struct osmo_prim_hdr *oph, void *ctx)
-{
- struct osmo_sccp_user *scu = ctx;
- struct hnbgw_cnlink *cnlink;
- struct osmo_scu_prim *prim = (struct osmo_scu_prim *) oph;
- int rc = 0;
-
- LOGP(DMAIN, LOGL_DEBUG, "sccp_sap_up(%s)\n", osmo_scu_prim_name(oph));
-
- if (!scu) {
- LOGP(DMAIN, LOGL_ERROR,
- "sccp_sap_up(): NULL osmo_sccp_user, cannot send prim (sap %u prim %u op %d)\n",
- oph->sap, oph->primitive, oph->operation);
- return -1;
- }
-
- cnlink = osmo_sccp_user_get_priv(scu);
- if (!cnlink) {
- LOGP(DMAIN, LOGL_ERROR,
- "sccp_sap_up(): NULL hnbgw_cnlink, cannot send prim (sap %u prim %u op %d)\n",
- oph->sap, oph->primitive, oph->operation);
- return -1;
- }
-
- switch (OSMO_PRIM_HDR(oph)) {
- case OSMO_PRIM(OSMO_SCU_PRIM_N_UNITDATA, PRIM_OP_INDICATION):
- rc = handle_cn_unitdata(cnlink, &prim->u.unitdata, oph);
- break;
- case OSMO_PRIM(OSMO_SCU_PRIM_N_CONNECT, PRIM_OP_CONFIRM):
- rc = handle_cn_conn_conf(cnlink, &prim->u.connect, oph);
- break;
- case OSMO_PRIM(OSMO_SCU_PRIM_N_DATA, PRIM_OP_INDICATION):
- rc = handle_cn_data_ind(cnlink, &prim->u.data, oph);
- break;
- case OSMO_PRIM(OSMO_SCU_PRIM_N_DISCONNECT, PRIM_OP_INDICATION):
- rc = handle_cn_disc_ind(cnlink, &prim->u.disconnect, oph);
- break;
- default:
- LOGP(DMAIN, LOGL_ERROR,
- "Received unknown prim %u from SCCP USER SAP\n",
- OSMO_PRIM_HDR(oph));
- break;
- }
-
- msgb_free(oph->msg);
-
- return rc;
-}
-
-static bool addr_has_pc_and_ssn(const struct osmo_sccp_addr *addr)
-{
- if (!(addr->presence & OSMO_SCCP_ADDR_T_SSN))
- return false;
- if (!(addr->presence & OSMO_SCCP_ADDR_T_PC))
- return false;
- return true;
-}
-
-static int resolve_addr_name(struct osmo_sccp_addr *dest, struct osmo_ss7_instance **ss7,
- const char *addr_name, const char *label,
- uint32_t default_pc)
-{
- struct osmo_ss7_instance *ss7_tmp;
-
- if (!addr_name) {
- osmo_sccp_make_addr_pc_ssn(dest, default_pc, OSMO_SCCP_SSN_RANAP);
- LOGP(DMAIN, LOGL_INFO, "%s remote addr not configured, using default: %s\n", label,
- osmo_sccp_addr_name(*ss7, dest));
- return 0;
- }
-
- ss7_tmp = osmo_sccp_addr_by_name(dest, addr_name);
- if (!ss7_tmp) {
- LOGP(DMAIN, LOGL_ERROR, "%s remote addr: no such SCCP address book entry: '%s'\n",
- label, addr_name);
- return -1;
- }
-
- if (*ss7 && (*ss7 != ss7_tmp)) {
- LOGP(DMAIN, LOGL_ERROR, "IuCS and IuPS cannot be served from separate CS7 instances,"
- " cs7 instance %d != %d\n", (*ss7)->cfg.id, ss7_tmp->cfg.id);
- return -1;
- }
-
- *ss7 = ss7_tmp;
-
- osmo_sccp_addr_set_ssn(dest, OSMO_SCCP_SSN_RANAP);
-
- if (!addr_has_pc_and_ssn(dest)) {
- LOGP(DMAIN, LOGL_ERROR, "Invalid/incomplete %s remote-addr: %s\n",
- label, osmo_sccp_addr_name(*ss7, dest));
- return -1;
- }
-
- LOGP(DRANAP, LOGL_NOTICE, "Remote %s SCCP addr: %s\n",
- label, osmo_sccp_addr_name(*ss7, dest));
- return 0;
-}
-
-int hnbgw_cnlink_init(struct hnb_gw *gw, const char *stp_host, uint16_t stp_port, const char *local_ip)
-{
- struct hnbgw_cnlink *cnlink;
- struct osmo_ss7_instance *ss7;
- uint32_t local_pc;
-
- OSMO_ASSERT(!gw->sccp.client);
- OSMO_ASSERT(!gw->sccp.cnlink);
-
- ss7 = NULL;
- if (resolve_addr_name(&gw->sccp.iucs_remote_addr, &ss7,
- gw->config.iucs_remote_addr_name, "IuCS", (23 << 3) + 1))
- return -1;
- if (resolve_addr_name(&gw->sccp.iups_remote_addr, &ss7,
- gw->config.iups_remote_addr_name, "IuPS", (23 << 3) + 4))
- return -1;
-
- if (!ss7) {
- LOGP(DRANAP, LOGL_NOTICE, "No cs7 instance configured for IuCS nor IuPS,"
- " creating default instance\n");
- ss7 = osmo_ss7_instance_find_or_create(gw, 0);
- ss7->cfg.primary_pc = (23 << 3) + 5;
- }
-
- if (!osmo_ss7_pc_is_valid(ss7->cfg.primary_pc)) {
- LOGP(DMAIN, LOGL_ERROR, "IuCS/IuPS uplink cannot be setup: CS7 instance %d has no point-code set\n",
- ss7->cfg.id);
- return -1;
- }
- local_pc = ss7->cfg.primary_pc;
-
- osmo_sccp_make_addr_pc_ssn(&gw->sccp.local_addr, local_pc, OSMO_SCCP_SSN_RANAP);
- LOGP(DRANAP, LOGL_NOTICE, "Local SCCP addr: %s\n", osmo_sccp_addr_name(ss7, &gw->sccp.local_addr));
-
- gw->sccp.client = osmo_sccp_simple_client_on_ss7_id(gw, ss7->cfg.id, "OsmoHNBGW",
- local_pc, OSMO_SS7_ASP_PROT_M3UA,
- 0, local_ip, stp_port, stp_host);
- if (!gw->sccp.client) {
- LOGP(DMAIN, LOGL_ERROR, "Failed to init SCCP Client\n");
- return -1;
- }
-
- cnlink = talloc_zero(gw, struct hnbgw_cnlink);
- cnlink->gw = gw;
- INIT_LLIST_HEAD(&cnlink->map_list);
- cnlink->T_RafC.cb = cnlink_trafc_cb;
- cnlink->T_RafC.data = gw;
- cnlink->next_conn_id = 1000;
-
- cnlink->sccp_user = osmo_sccp_user_bind_pc(gw->sccp.client, "OsmoHNBGW", sccp_sap_up,
- OSMO_SCCP_SSN_RANAP, gw->sccp.local_addr.pc);
- if (!cnlink->sccp_user) {
- LOGP(DMAIN, LOGL_ERROR, "Failed to init SCCP User\n");
- return -1;
- }
-
- LOGP(DRANAP, LOGL_NOTICE, "Remote SCCP addr: IuCS: %s\n",
- osmo_sccp_addr_name(ss7, &gw->sccp.iucs_remote_addr));
- LOGP(DRANAP, LOGL_NOTICE, "Remote SCCP addr: IuPS: %s\n",
- osmo_sccp_addr_name(ss7, &gw->sccp.iups_remote_addr));
-
- /* In sccp_sap_up() we expect the cnlink in the user's priv. */
- osmo_sccp_user_set_priv(cnlink->sccp_user, cnlink);
-
- gw->sccp.cnlink = cnlink;
-
- return 0;
-}
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