Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 1 | /* IuCS/IuPS Core Network interface of HNB-GW */ |
| 2 | |
| 3 | /* (C) 2015 by Harald Welte <laforge@gnumonks.org> |
| 4 | * All Rights Reserved |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU Affero General Public License as published by |
| 8 | * the Free Software Foundation; either version 3 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU Affero General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU Affero General Public License |
| 17 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 18 | * |
| 19 | */ |
| 20 | |
Neels Hofmeyr | 37017f5 | 2016-04-15 22:47:21 +0200 | [diff] [blame] | 21 | #include <arpa/inet.h> |
| 22 | |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 23 | #include <osmocom/core/msgb.h> |
| 24 | #include <osmocom/core/utils.h> |
| 25 | #include <osmocom/core/timer.h> |
| 26 | |
Neels Hofmeyr | 0f88c11 | 2017-07-03 16:49:43 +0200 | [diff] [blame] | 27 | #include <osmocom/sigtran/protocol/m3ua.h> |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 28 | #include <osmocom/sigtran/sccp_sap.h> |
Neels Hofmeyr | 3da8608 | 2016-03-30 12:36:15 +0200 | [diff] [blame] | 29 | #include <osmocom/sigtran/sccp_helpers.h> |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 30 | |
Neels Hofmeyr | df63de2 | 2016-08-18 13:13:55 +0200 | [diff] [blame] | 31 | #include <osmocom/iuh/hnbgw.h> |
| 32 | #include <osmocom/iuh/hnbgw_rua.h> |
Neels Hofmeyr | 96979af | 2016-01-05 15:19:44 +0100 | [diff] [blame] | 33 | #include <osmocom/ranap/ranap_ies_defs.h> |
| 34 | #include <osmocom/ranap/ranap_msg_factory.h> |
Neels Hofmeyr | df63de2 | 2016-08-18 13:13:55 +0200 | [diff] [blame] | 35 | #include <osmocom/iuh/context_map.h> |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 36 | |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 37 | /*********************************************************************** |
| 38 | * Outbound RANAP RESET to CN |
| 39 | ***********************************************************************/ |
| 40 | |
Harald Welte | da86fe5 | 2017-11-21 08:14:37 +0100 | [diff] [blame^] | 41 | void hnbgw_cnlink_change_state(struct hnbgw_cnlink *cnlink, enum hnbgw_cnlink_state state); |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 42 | |
Neels Hofmeyr | 0f88c11 | 2017-07-03 16:49:43 +0200 | [diff] [blame] | 43 | static int transmit_rst(struct hnb_gw *gw, RANAP_CN_DomainIndicator_t domain, |
| 44 | struct osmo_sccp_addr *remote_addr) |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 45 | { |
| 46 | struct msgb *msg; |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 47 | RANAP_Cause_t cause = { |
| 48 | .present = RANAP_Cause_PR_transmissionNetwork, |
| 49 | .choice. transmissionNetwork = RANAP_CauseTransmissionNetwork_signalling_transport_resource_failure, |
| 50 | }; |
| 51 | |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 52 | msg = ranap_new_msg_reset(domain, &cause); |
| 53 | |
Neels Hofmeyr | 0f88c11 | 2017-07-03 16:49:43 +0200 | [diff] [blame] | 54 | return osmo_sccp_tx_unitdata_msg(gw->sccp.cnlink->sccp_user, |
| 55 | &gw->sccp.local_addr, |
| 56 | remote_addr, |
| 57 | msg); |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 58 | } |
| 59 | |
| 60 | /* Timer callback once T_RafC expires */ |
| 61 | static void cnlink_trafc_cb(void *data) |
| 62 | { |
Neels Hofmeyr | 0f88c11 | 2017-07-03 16:49:43 +0200 | [diff] [blame] | 63 | struct hnb_gw *gw = data; |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 64 | |
Neels Hofmeyr | ecbdc5c | 2017-07-31 13:13:24 +0200 | [diff] [blame] | 65 | transmit_rst(gw, RANAP_CN_DomainIndicator_cs_domain, &gw->sccp.iucs_remote_addr); |
| 66 | transmit_rst(gw, RANAP_CN_DomainIndicator_ps_domain, &gw->sccp.iups_remote_addr); |
Neels Hofmeyr | 0f88c11 | 2017-07-03 16:49:43 +0200 | [diff] [blame] | 67 | hnbgw_cnlink_change_state(gw->sccp.cnlink, CNLINK_S_EST_RST_TX_WAIT_ACK); |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 68 | /* The spec states that we should abandon after a configurable |
| 69 | * number of times. We decide to simply continue trying */ |
| 70 | } |
| 71 | |
| 72 | /* change the state of a CN Link */ |
Harald Welte | da86fe5 | 2017-11-21 08:14:37 +0100 | [diff] [blame^] | 73 | void hnbgw_cnlink_change_state(struct hnbgw_cnlink *cnlink, enum hnbgw_cnlink_state state) |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 74 | { |
| 75 | switch (state) { |
| 76 | case CNLINK_S_NULL: |
| 77 | case CNLINK_S_EST_PEND: |
| 78 | break; |
| 79 | case CNLINK_S_EST_CONF: |
Neels Hofmeyr | 0f88c11 | 2017-07-03 16:49:43 +0200 | [diff] [blame] | 80 | cnlink_trafc_cb(cnlink->gw); |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 81 | break; |
| 82 | case CNLINK_S_EST_RST_TX_WAIT_ACK: |
| 83 | osmo_timer_schedule(&cnlink->T_RafC, 5, 0); |
| 84 | break; |
| 85 | case CNLINK_S_EST_ACTIVE: |
| 86 | osmo_timer_del(&cnlink->T_RafC); |
| 87 | break; |
| 88 | } |
| 89 | } |
| 90 | |
| 91 | /*********************************************************************** |
| 92 | * Incoming primitives from SCCP User SAP |
| 93 | ***********************************************************************/ |
| 94 | |
| 95 | static int cn_ranap_rx_reset_cmd(struct hnbgw_cnlink *cnlink, |
| 96 | RANAP_InitiatingMessage_t *imsg) |
| 97 | { |
| 98 | RANAP_ResetIEs_t ies; |
| 99 | int rc; |
| 100 | |
| 101 | rc = ranap_decode_reseties(&ies, &imsg->value); |
| 102 | /* FIXME: reset resources and return reset ack */ |
Daniel Willmann | 11e912a | 2016-01-07 13:19:30 +0100 | [diff] [blame] | 103 | |
| 104 | ranap_free_reseties(&ies); |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 105 | return rc; |
| 106 | } |
| 107 | |
| 108 | static int cn_ranap_rx_reset_ack(struct hnbgw_cnlink *cnlink, |
| 109 | RANAP_SuccessfulOutcome_t *omsg) |
| 110 | { |
| 111 | RANAP_ResetAcknowledgeIEs_t ies; |
| 112 | int rc; |
| 113 | |
| 114 | rc = ranap_decode_resetacknowledgeies(&ies, &omsg->value); |
| 115 | |
| 116 | hnbgw_cnlink_change_state(cnlink, CNLINK_S_EST_ACTIVE); |
| 117 | |
Daniel Willmann | 11e912a | 2016-01-07 13:19:30 +0100 | [diff] [blame] | 118 | ranap_free_resetacknowledgeies(&ies); |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 119 | return rc; |
| 120 | } |
| 121 | |
| 122 | static int cn_ranap_rx_paging_cmd(struct hnbgw_cnlink *cnlink, |
Harald Welte | bc4560c | 2015-12-24 08:46:58 +0100 | [diff] [blame] | 123 | RANAP_InitiatingMessage_t *imsg, |
| 124 | const uint8_t *data, unsigned int len) |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 125 | { |
Neels Hofmeyr | 2b01f3a | 2016-04-19 17:57:03 +0200 | [diff] [blame] | 126 | struct hnb_gw *gw = cnlink->gw; |
Harald Welte | bc4560c | 2015-12-24 08:46:58 +0100 | [diff] [blame] | 127 | struct hnb_context *hnb; |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 128 | RANAP_PagingIEs_t ies; |
Harald Welte | da86fe5 | 2017-11-21 08:14:37 +0100 | [diff] [blame^] | 129 | int rc; |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 130 | |
| 131 | rc = ranap_decode_pagingies(&ies, &imsg->value); |
Harald Welte | da86fe5 | 2017-11-21 08:14:37 +0100 | [diff] [blame^] | 132 | if (rc < 0) |
| 133 | return rc; |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 134 | |
Harald Welte | bc4560c | 2015-12-24 08:46:58 +0100 | [diff] [blame] | 135 | /* FIXME: determine which HNBs to send this Paging command, |
| 136 | * rather than broadcasting to all HNBs */ |
| 137 | llist_for_each_entry(hnb, &gw->hnb_list, list) { |
| 138 | rc = rua_tx_udt(hnb, data, len); |
| 139 | } |
Daniel Willmann | 11e912a | 2016-01-07 13:19:30 +0100 | [diff] [blame] | 140 | |
| 141 | ranap_free_pagingies(&ies); |
Harald Welte | bc4560c | 2015-12-24 08:46:58 +0100 | [diff] [blame] | 142 | return 0; |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 143 | } |
| 144 | |
| 145 | static int cn_ranap_rx_initiating_msg(struct hnbgw_cnlink *cnlink, |
Harald Welte | bc4560c | 2015-12-24 08:46:58 +0100 | [diff] [blame] | 146 | RANAP_InitiatingMessage_t *imsg, |
| 147 | const uint8_t *data, unsigned int len) |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 148 | { |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 149 | switch (imsg->procedureCode) { |
| 150 | case RANAP_ProcedureCode_id_Reset: |
| 151 | return cn_ranap_rx_reset_cmd(cnlink, imsg); |
| 152 | case RANAP_ProcedureCode_id_Paging: |
Harald Welte | bc4560c | 2015-12-24 08:46:58 +0100 | [diff] [blame] | 153 | return cn_ranap_rx_paging_cmd(cnlink, imsg, data, len); |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 154 | case RANAP_ProcedureCode_id_OverloadControl: /* Overload ind */ |
| 155 | break; |
| 156 | case RANAP_ProcedureCode_id_ErrorIndication: /* Error ind */ |
| 157 | break; |
| 158 | case RANAP_ProcedureCode_id_ResetResource: /* request */ |
| 159 | case RANAP_ProcedureCode_id_InformationTransfer: |
| 160 | case RANAP_ProcedureCode_id_DirectInformationTransfer: |
| 161 | case RANAP_ProcedureCode_id_UplinkInformationExchange: |
| 162 | LOGP(DRANAP, LOGL_NOTICE, "Received unsupported RANAP " |
Harald Welte | da86fe5 | 2017-11-21 08:14:37 +0100 | [diff] [blame^] | 163 | "Procedure %ld from CN, ignoring\n", imsg->procedureCode); |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 164 | break; |
| 165 | default: |
| 166 | LOGP(DRANAP, LOGL_NOTICE, "Received suspicious RANAP " |
Harald Welte | da86fe5 | 2017-11-21 08:14:37 +0100 | [diff] [blame^] | 167 | "Procedure %ld from CN, ignoring\n", imsg->procedureCode); |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 168 | break; |
| 169 | } |
| 170 | return 0; |
| 171 | } |
| 172 | |
| 173 | static int cn_ranap_rx_successful_msg(struct hnbgw_cnlink *cnlink, |
| 174 | RANAP_SuccessfulOutcome_t *omsg) |
| 175 | { |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 176 | switch (omsg->procedureCode) { |
| 177 | case RANAP_ProcedureCode_id_Reset: /* Reset acknowledge */ |
| 178 | return cn_ranap_rx_reset_ack(cnlink, omsg); |
| 179 | case RANAP_ProcedureCode_id_ResetResource: /* response */ |
| 180 | case RANAP_ProcedureCode_id_InformationTransfer: |
| 181 | case RANAP_ProcedureCode_id_DirectInformationTransfer: |
| 182 | case RANAP_ProcedureCode_id_UplinkInformationExchange: |
| 183 | LOGP(DRANAP, LOGL_NOTICE, "Received unsupported RANAP " |
Harald Welte | da86fe5 | 2017-11-21 08:14:37 +0100 | [diff] [blame^] | 184 | "Procedure %ld from CN, ignoring\n", omsg->procedureCode); |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 185 | break; |
| 186 | default: |
| 187 | LOGP(DRANAP, LOGL_NOTICE, "Received suspicious RANAP " |
Harald Welte | da86fe5 | 2017-11-21 08:14:37 +0100 | [diff] [blame^] | 188 | "Procedure %ld from CN, ignoring\n", omsg->procedureCode); |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 189 | break; |
| 190 | } |
| 191 | return 0; |
| 192 | } |
| 193 | |
| 194 | |
Harald Welte | bc4560c | 2015-12-24 08:46:58 +0100 | [diff] [blame] | 195 | static int _cn_ranap_rx(struct hnbgw_cnlink *cnlink, RANAP_RANAP_PDU_t *pdu, |
| 196 | const uint8_t *data, unsigned int len) |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 197 | { |
| 198 | int rc; |
| 199 | |
| 200 | switch (pdu->present) { |
| 201 | case RANAP_RANAP_PDU_PR_initiatingMessage: |
Harald Welte | bc4560c | 2015-12-24 08:46:58 +0100 | [diff] [blame] | 202 | rc = cn_ranap_rx_initiating_msg(cnlink, &pdu->choice.initiatingMessage, |
| 203 | data, len); |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 204 | break; |
| 205 | case RANAP_RANAP_PDU_PR_successfulOutcome: |
| 206 | rc = cn_ranap_rx_successful_msg(cnlink, &pdu->choice.successfulOutcome); |
| 207 | break; |
| 208 | case RANAP_RANAP_PDU_PR_unsuccessfulOutcome: |
| 209 | LOGP(DRANAP, LOGL_NOTICE, "Received unsupported RANAP " |
Harald Welte | da86fe5 | 2017-11-21 08:14:37 +0100 | [diff] [blame^] | 210 | "unsuccessful outcome procedure %ld from CN, ignoring\n", |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 211 | pdu->choice.unsuccessfulOutcome.procedureCode); |
| 212 | break; |
| 213 | default: |
| 214 | LOGP(DRANAP, LOGL_NOTICE, "Received suspicious RANAP " |
| 215 | "presence %u from CN, ignoring\n", pdu->present); |
| 216 | break; |
| 217 | } |
Harald Welte | da86fe5 | 2017-11-21 08:14:37 +0100 | [diff] [blame^] | 218 | |
| 219 | return rc; |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 220 | } |
| 221 | |
| 222 | static int handle_cn_ranap(struct hnbgw_cnlink *cnlink, const uint8_t *data, |
| 223 | unsigned int len) |
| 224 | { |
| 225 | RANAP_RANAP_PDU_t _pdu, *pdu = &_pdu; |
| 226 | asn_dec_rval_t dec_ret; |
| 227 | int rc; |
| 228 | |
| 229 | memset(pdu, 0, sizeof(*pdu)); |
| 230 | dec_ret = aper_decode(NULL,&asn_DEF_RANAP_RANAP_PDU, (void **) &pdu, |
| 231 | data, len, 0, 0); |
| 232 | if (dec_ret.code != RC_OK) { |
| 233 | LOGP(DRANAP, LOGL_ERROR, "Error in RANAP ASN.1 decode\n"); |
Neels Hofmeyr | a6a68e6 | 2016-11-25 13:21:02 +0100 | [diff] [blame] | 234 | return -1; |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 235 | } |
| 236 | |
Harald Welte | bc4560c | 2015-12-24 08:46:58 +0100 | [diff] [blame] | 237 | rc = _cn_ranap_rx(cnlink, pdu, data, len); |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 238 | |
| 239 | return rc; |
| 240 | } |
| 241 | |
Neels Hofmeyr | a3bcd6d | 2017-07-03 14:29:04 +0200 | [diff] [blame] | 242 | static bool pc_and_ssn_match(const struct osmo_sccp_addr *a, const struct osmo_sccp_addr *b) |
| 243 | { |
| 244 | return (a == b) |
| 245 | || ((a->pc == b->pc) |
| 246 | && (a->ssn == b->ssn)); |
| 247 | } |
| 248 | |
| 249 | static int classify_cn_remote_addr(const struct hnb_gw *gw, |
| 250 | const struct osmo_sccp_addr *cn_remote_addr, |
| 251 | bool *is_ps) |
| 252 | { |
Neels Hofmeyr | ecbdc5c | 2017-07-31 13:13:24 +0200 | [diff] [blame] | 253 | if (pc_and_ssn_match(cn_remote_addr, &gw->sccp.iucs_remote_addr)) { |
Neels Hofmeyr | a3bcd6d | 2017-07-03 14:29:04 +0200 | [diff] [blame] | 254 | if (is_ps) |
| 255 | *is_ps = false; |
| 256 | return 0; |
| 257 | } |
Neels Hofmeyr | ecbdc5c | 2017-07-31 13:13:24 +0200 | [diff] [blame] | 258 | if (pc_and_ssn_match(cn_remote_addr, &gw->sccp.iups_remote_addr)) { |
Neels Hofmeyr | a3bcd6d | 2017-07-03 14:29:04 +0200 | [diff] [blame] | 259 | if (is_ps) |
| 260 | *is_ps = true; |
| 261 | return 0; |
| 262 | } |
| 263 | LOGP(DMAIN, LOGL_ERROR, "Unexpected remote address, matches neither CS nor PS address: %s\n", |
| 264 | osmo_sccp_addr_dump(cn_remote_addr)); |
| 265 | return -1; |
| 266 | } |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 267 | |
| 268 | static int handle_cn_unitdata(struct hnbgw_cnlink *cnlink, |
| 269 | const struct osmo_scu_unitdata_param *param, |
| 270 | struct osmo_prim_hdr *oph) |
| 271 | { |
Harald Welte | 8c572fe | 2015-12-26 08:42:07 +0100 | [diff] [blame] | 272 | if (param->called_addr.ssn != OSMO_SCCP_SSN_RANAP) { |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 273 | LOGP(DMAIN, LOGL_NOTICE, "N-UNITDATA.ind for unknown SSN %u\n", |
| 274 | param->called_addr.ssn); |
| 275 | return -1; |
| 276 | } |
| 277 | |
Neels Hofmeyr | a3bcd6d | 2017-07-03 14:29:04 +0200 | [diff] [blame] | 278 | if (classify_cn_remote_addr(cnlink->gw, ¶m->calling_addr, NULL) < 0) |
| 279 | return -1; |
| 280 | |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 281 | return handle_cn_ranap(cnlink, msgb_l2(oph->msg), msgb_l2len(oph->msg)); |
| 282 | } |
| 283 | |
Neels Hofmeyr | 6503767 | 2016-04-19 18:00:54 +0200 | [diff] [blame] | 284 | static int handle_cn_conn_conf(struct hnbgw_cnlink *cnlink, |
Neels Hofmeyr | 630483b | 2016-04-19 18:01:25 +0200 | [diff] [blame] | 285 | const struct osmo_scu_connect_param *param, |
| 286 | struct osmo_prim_hdr *oph) |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 287 | { |
| 288 | /* we don't actually need to do anything, as RUA towards the HNB |
| 289 | * doesn't seem to know any confirmations to its CONNECT |
| 290 | * operation */ |
| 291 | |
Neels Hofmeyr | 0ff2443 | 2016-04-04 18:33:33 +0200 | [diff] [blame] | 292 | LOGP(DMAIN, LOGL_DEBUG, "handle_cn_conn_conf() conn_id=%d\n", |
| 293 | param->conn_id); |
| 294 | LOGP(DMAIN, LOGL_DEBUG, "handle_cn_conn_conf() called_addr=%s\n", |
| 295 | inet_ntoa(param->called_addr.ip.v4)); |
| 296 | LOGP(DMAIN, LOGL_DEBUG, "handle_cn_conn_conf() calling_addr=%s\n", |
| 297 | inet_ntoa(param->calling_addr.ip.v4)); |
| 298 | LOGP(DMAIN, LOGL_DEBUG, "handle_cn_conn_conf() responding_addr=%s\n", |
| 299 | inet_ntoa(param->responding_addr.ip.v4)); |
| 300 | |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 301 | return 0; |
| 302 | } |
| 303 | |
Neels Hofmeyr | 6503767 | 2016-04-19 18:00:54 +0200 | [diff] [blame] | 304 | static int handle_cn_data_ind(struct hnbgw_cnlink *cnlink, |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 305 | const struct osmo_scu_data_param *param, |
| 306 | struct osmo_prim_hdr *oph) |
| 307 | { |
| 308 | struct hnbgw_context_map *map; |
| 309 | |
| 310 | /* connection-oriented data is always passed transparently |
| 311 | * towards the specific HNB, via a RUA connection identified by |
| 312 | * conn_id */ |
| 313 | |
| 314 | map = context_map_by_cn(cnlink, param->conn_id); |
| 315 | if (!map) { |
| 316 | /* FIXME: Return an error / released primitive */ |
| 317 | return 0; |
| 318 | } |
| 319 | |
Neels Hofmeyr | 0f88c11 | 2017-07-03 16:49:43 +0200 | [diff] [blame] | 320 | return rua_tx_dt(map->hnb_ctx, map->is_ps, map->rua_ctx_id, |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 321 | msgb_l2(oph->msg), msgb_l2len(oph->msg)); |
| 322 | } |
| 323 | |
Neels Hofmeyr | 6503767 | 2016-04-19 18:00:54 +0200 | [diff] [blame] | 324 | static int handle_cn_disc_ind(struct hnbgw_cnlink *cnlink, |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 325 | const struct osmo_scu_disconn_param *param, |
| 326 | struct osmo_prim_hdr *oph) |
| 327 | { |
| 328 | struct hnbgw_context_map *map; |
| 329 | |
Neels Hofmeyr | 02be4e3 | 2016-04-04 19:29:35 +0200 | [diff] [blame] | 330 | LOGP(DMAIN, LOGL_DEBUG, "handle_cn_disc_ind() conn_id=%d originator=%d\n", |
| 331 | param->conn_id, param->originator); |
| 332 | LOGP(DMAIN, LOGL_DEBUG, "handle_cn_disc_ind() responding_addr=%s\n", |
| 333 | inet_ntoa(param->responding_addr.ip.v4)); |
| 334 | |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 335 | RUA_Cause_t rua_cause = { |
| 336 | .present = RUA_Cause_PR_NOTHING, |
| 337 | /* FIXME: Convert incoming SCCP cause to RUA cause */ |
| 338 | }; |
| 339 | |
| 340 | /* we need to notify the HNB associated with this connection via |
| 341 | * a RUA DISCONNECT */ |
| 342 | |
| 343 | map = context_map_by_cn(cnlink, param->conn_id); |
| 344 | if (!map) { |
| 345 | /* FIXME: Return an error / released primitive */ |
| 346 | return 0; |
| 347 | } |
| 348 | |
Neels Hofmeyr | 0f88c11 | 2017-07-03 16:49:43 +0200 | [diff] [blame] | 349 | return rua_tx_disc(map->hnb_ctx, map->is_ps, map->rua_ctx_id, |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 350 | &rua_cause, msgb_l2(oph->msg), msgb_l2len(oph->msg)); |
| 351 | } |
| 352 | |
| 353 | /* Entry point for primitives coming up from SCCP User SAP */ |
Neels Hofmeyr | a1bf4f3 | 2016-07-07 15:36:07 +0200 | [diff] [blame] | 354 | static int sccp_sap_up(struct osmo_prim_hdr *oph, void *ctx) |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 355 | { |
Neels Hofmeyr | 0f88c11 | 2017-07-03 16:49:43 +0200 | [diff] [blame] | 356 | struct osmo_sccp_user *scu = ctx; |
Neels Hofmeyr | cb24631 | 2017-06-20 22:49:34 +0200 | [diff] [blame] | 357 | struct hnbgw_cnlink *cnlink; |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 358 | struct osmo_scu_prim *prim = (struct osmo_scu_prim *) oph; |
Harald Welte | da86fe5 | 2017-11-21 08:14:37 +0100 | [diff] [blame^] | 359 | int rc = 0; |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 360 | |
| 361 | LOGP(DMAIN, LOGL_DEBUG, "sccp_sap_up(%s)\n", osmo_scu_prim_name(oph)); |
| 362 | |
Neels Hofmeyr | cb24631 | 2017-06-20 22:49:34 +0200 | [diff] [blame] | 363 | if (!scu) { |
| 364 | LOGP(DMAIN, LOGL_ERROR, |
| 365 | "sccp_sap_up(): NULL osmo_sccp_user, cannot send prim (sap %u prim %u op %d)\n", |
| 366 | oph->sap, oph->primitive, oph->operation); |
| 367 | return -1; |
| 368 | } |
| 369 | |
| 370 | cnlink = osmo_sccp_user_get_priv(scu); |
| 371 | if (!cnlink) { |
| 372 | LOGP(DMAIN, LOGL_ERROR, |
| 373 | "sccp_sap_up(): NULL hnbgw_cnlink, cannot send prim (sap %u prim %u op %d)\n", |
| 374 | oph->sap, oph->primitive, oph->operation); |
| 375 | return -1; |
| 376 | } |
| 377 | |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 378 | switch (OSMO_PRIM_HDR(oph)) { |
| 379 | case OSMO_PRIM(OSMO_SCU_PRIM_N_UNITDATA, PRIM_OP_INDICATION): |
Neels Hofmeyr | 6503767 | 2016-04-19 18:00:54 +0200 | [diff] [blame] | 380 | rc = handle_cn_unitdata(cnlink, &prim->u.unitdata, oph); |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 381 | break; |
| 382 | case OSMO_PRIM(OSMO_SCU_PRIM_N_CONNECT, PRIM_OP_CONFIRM): |
Neels Hofmeyr | 6503767 | 2016-04-19 18:00:54 +0200 | [diff] [blame] | 383 | rc = handle_cn_conn_conf(cnlink, &prim->u.connect, oph); |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 384 | break; |
| 385 | case OSMO_PRIM(OSMO_SCU_PRIM_N_DATA, PRIM_OP_INDICATION): |
Neels Hofmeyr | 6503767 | 2016-04-19 18:00:54 +0200 | [diff] [blame] | 386 | rc = handle_cn_data_ind(cnlink, &prim->u.data, oph); |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 387 | break; |
| 388 | case OSMO_PRIM(OSMO_SCU_PRIM_N_DISCONNECT, PRIM_OP_INDICATION): |
Neels Hofmeyr | 6503767 | 2016-04-19 18:00:54 +0200 | [diff] [blame] | 389 | rc = handle_cn_disc_ind(cnlink, &prim->u.disconnect, oph); |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 390 | break; |
Harald Welte | ffc2093 | 2017-11-21 08:09:40 +0100 | [diff] [blame] | 391 | default: |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 392 | LOGP(DMAIN, LOGL_ERROR, |
| 393 | "Received unknown prim %u from SCCP USER SAP\n", |
| 394 | OSMO_PRIM_HDR(oph)); |
| 395 | break; |
| 396 | } |
| 397 | |
| 398 | msgb_free(oph->msg); |
| 399 | |
Harald Welte | da86fe5 | 2017-11-21 08:14:37 +0100 | [diff] [blame^] | 400 | return rc; |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 401 | } |
| 402 | |
Neels Hofmeyr | ecbdc5c | 2017-07-31 13:13:24 +0200 | [diff] [blame] | 403 | static bool addr_has_pc_and_ssn(const struct osmo_sccp_addr *addr) |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 404 | { |
Neels Hofmeyr | ecbdc5c | 2017-07-31 13:13:24 +0200 | [diff] [blame] | 405 | if (!(addr->presence & OSMO_SCCP_ADDR_T_SSN)) |
| 406 | return false; |
| 407 | if (!(addr->presence & OSMO_SCCP_ADDR_T_PC)) |
| 408 | return false; |
| 409 | return true; |
| 410 | } |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 411 | |
Neels Hofmeyr | ecbdc5c | 2017-07-31 13:13:24 +0200 | [diff] [blame] | 412 | static int resolve_addr_name(struct osmo_sccp_addr *dest, struct osmo_ss7_instance **ss7, |
| 413 | const char *addr_name, const char *label) |
| 414 | { |
| 415 | struct osmo_ss7_instance *ss7_tmp; |
Neels Hofmeyr | 0f88c11 | 2017-07-03 16:49:43 +0200 | [diff] [blame] | 416 | |
Neels Hofmeyr | ecbdc5c | 2017-07-31 13:13:24 +0200 | [diff] [blame] | 417 | if (!addr_name) { |
| 418 | LOGP(DMAIN, LOGL_ERROR, "Missing config: %s remote-addr\n", label); |
Neels Hofmeyr | 0f88c11 | 2017-07-03 16:49:43 +0200 | [diff] [blame] | 419 | return -1; |
| 420 | } |
| 421 | |
Neels Hofmeyr | ecbdc5c | 2017-07-31 13:13:24 +0200 | [diff] [blame] | 422 | ss7_tmp = osmo_sccp_addr_by_name(dest, addr_name); |
| 423 | if (!ss7_tmp) { |
| 424 | LOGP(DMAIN, LOGL_ERROR, "%s remote addr: no such SCCP address book entry: '%s'\n", |
| 425 | label, addr_name); |
| 426 | return -1; |
| 427 | } |
Neels Hofmeyr | 0f88c11 | 2017-07-03 16:49:43 +0200 | [diff] [blame] | 428 | |
Neels Hofmeyr | ecbdc5c | 2017-07-31 13:13:24 +0200 | [diff] [blame] | 429 | if (*ss7 && (*ss7 != ss7_tmp)) { |
| 430 | LOGP(DMAIN, LOGL_ERROR, "IuCS and IuPS cannot be served from separate CS7 instances," |
| 431 | " cs7 instance %d != %d\n", (*ss7)->cfg.id, ss7_tmp->cfg.id); |
| 432 | return -1; |
| 433 | } |
| 434 | |
| 435 | *ss7 = ss7_tmp; |
| 436 | |
| 437 | osmo_sccp_addr_set_ssn(dest, OSMO_SCCP_SSN_RANAP); |
| 438 | |
| 439 | if (!addr_has_pc_and_ssn(dest)) { |
| 440 | LOGP(DMAIN, LOGL_ERROR, "Invalid/incomplete %s remote-addr: %s\n", |
Alexander Couzens | e03d8a0 | 2017-08-15 12:19:45 +0000 | [diff] [blame] | 441 | label, osmo_sccp_addr_name(*ss7, dest)); |
Neels Hofmeyr | ecbdc5c | 2017-07-31 13:13:24 +0200 | [diff] [blame] | 442 | return -1; |
| 443 | } |
| 444 | |
| 445 | LOGP(DRANAP, LOGL_NOTICE, "Remote %s SCCP addr: %s\n", |
| 446 | label, osmo_sccp_addr_name(*ss7, dest)); |
| 447 | return 0; |
| 448 | } |
| 449 | |
| 450 | int hnbgw_cnlink_init(struct hnb_gw *gw, const char *stp_host, uint16_t stp_port, const char *local_ip) |
| 451 | { |
| 452 | struct hnbgw_cnlink *cnlink; |
| 453 | struct osmo_ss7_instance *ss7; |
| 454 | uint32_t local_pc; |
Neels Hofmeyr | ecbdc5c | 2017-07-31 13:13:24 +0200 | [diff] [blame] | 455 | |
| 456 | OSMO_ASSERT(!gw->sccp.client); |
| 457 | OSMO_ASSERT(!gw->sccp.cnlink); |
| 458 | |
| 459 | ss7 = NULL; |
| 460 | if (resolve_addr_name(&gw->sccp.iucs_remote_addr, &ss7, |
| 461 | gw->config.iucs_remote_addr_name, "IuCS")) |
| 462 | return -1; |
| 463 | if (resolve_addr_name(&gw->sccp.iups_remote_addr, &ss7, |
| 464 | gw->config.iups_remote_addr_name, "IuPS")) |
| 465 | return -1; |
| 466 | |
| 467 | if (!osmo_ss7_pc_is_valid(ss7->cfg.primary_pc)) { |
| 468 | LOGP(DMAIN, LOGL_ERROR, "IuCS/IuPS uplink cannot be setup: CS7 instance %d has no point-code set\n", |
| 469 | ss7->cfg.id); |
| 470 | return -1; |
| 471 | } |
| 472 | local_pc = ss7->cfg.primary_pc; |
| 473 | |
| 474 | osmo_sccp_make_addr_pc_ssn(&gw->sccp.local_addr, local_pc, OSMO_SCCP_SSN_RANAP); |
Neels Hofmeyr | ecbdc5c | 2017-07-31 13:13:24 +0200 | [diff] [blame] | 475 | LOGP(DRANAP, LOGL_NOTICE, "Local SCCP addr: %s\n", osmo_sccp_addr_name(ss7, &gw->sccp.local_addr)); |
| 476 | |
| 477 | gw->sccp.client = osmo_sccp_simple_client_on_ss7_id(gw, ss7->cfg.id, "OsmoHNBGW", |
| 478 | local_pc, OSMO_SS7_ASP_PROT_M3UA, |
| 479 | 0, local_ip, stp_port, stp_host); |
| 480 | if (!gw->sccp.client) { |
| 481 | LOGP(DMAIN, LOGL_ERROR, "Failed to init SCCP Client\n"); |
| 482 | return -1; |
| 483 | } |
Neels Hofmeyr | 0f88c11 | 2017-07-03 16:49:43 +0200 | [diff] [blame] | 484 | |
| 485 | cnlink = talloc_zero(gw, struct hnbgw_cnlink); |
Neels Hofmeyr | 2b01f3a | 2016-04-19 17:57:03 +0200 | [diff] [blame] | 486 | cnlink->gw = gw; |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 487 | INIT_LLIST_HEAD(&cnlink->map_list); |
| 488 | cnlink->T_RafC.cb = cnlink_trafc_cb; |
Neels Hofmeyr | 0f88c11 | 2017-07-03 16:49:43 +0200 | [diff] [blame] | 489 | cnlink->T_RafC.data = gw; |
Harald Welte | 552fdf1 | 2015-12-26 23:39:30 +0100 | [diff] [blame] | 490 | cnlink->next_conn_id = 1000; |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 491 | |
Neels Hofmeyr | ecbdc5c | 2017-07-31 13:13:24 +0200 | [diff] [blame] | 492 | cnlink->sccp_user = osmo_sccp_user_bind_pc(gw->sccp.client, "OsmoHNBGW", sccp_sap_up, |
| 493 | OSMO_SCCP_SSN_RANAP, gw->sccp.local_addr.pc); |
Neels Hofmeyr | 0f88c11 | 2017-07-03 16:49:43 +0200 | [diff] [blame] | 494 | if (!cnlink->sccp_user) { |
| 495 | LOGP(DMAIN, LOGL_ERROR, "Failed to init SCCP User\n"); |
| 496 | return -1; |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 497 | } |
| 498 | |
Neels Hofmeyr | 0f88c11 | 2017-07-03 16:49:43 +0200 | [diff] [blame] | 499 | /* In sccp_sap_up() we expect the cnlink in the user's priv. */ |
| 500 | osmo_sccp_user_set_priv(cnlink->sccp_user, cnlink); |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 501 | |
Neels Hofmeyr | 0f88c11 | 2017-07-03 16:49:43 +0200 | [diff] [blame] | 502 | gw->sccp.cnlink = cnlink; |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 503 | |
Neels Hofmeyr | 0f88c11 | 2017-07-03 16:49:43 +0200 | [diff] [blame] | 504 | return 0; |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 505 | } |