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> |
Neels Hofmeyr | e3644ac | 2018-01-15 23:25:42 +0100 | [diff] [blame] | 22 | #include <errno.h> |
Neels Hofmeyr | 37017f5 | 2016-04-15 22:47:21 +0200 | [diff] [blame] | 23 | |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 24 | #include <osmocom/core/msgb.h> |
| 25 | #include <osmocom/core/utils.h> |
| 26 | #include <osmocom/core/timer.h> |
| 27 | |
Neels Hofmeyr | 0f88c11 | 2017-07-03 16:49:43 +0200 | [diff] [blame] | 28 | #include <osmocom/sigtran/protocol/m3ua.h> |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 29 | #include <osmocom/sigtran/sccp_sap.h> |
Neels Hofmeyr | 3da8608 | 2016-03-30 12:36:15 +0200 | [diff] [blame] | 30 | #include <osmocom/sigtran/sccp_helpers.h> |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 31 | |
Neels Hofmeyr | df63de2 | 2016-08-18 13:13:55 +0200 | [diff] [blame] | 32 | #include <osmocom/iuh/hnbgw.h> |
| 33 | #include <osmocom/iuh/hnbgw_rua.h> |
Neels Hofmeyr | 96979af | 2016-01-05 15:19:44 +0100 | [diff] [blame] | 34 | #include <osmocom/ranap/ranap_ies_defs.h> |
| 35 | #include <osmocom/ranap/ranap_msg_factory.h> |
Neels Hofmeyr | df63de2 | 2016-08-18 13:13:55 +0200 | [diff] [blame] | 36 | #include <osmocom/iuh/context_map.h> |
Neels Hofmeyr | 39d7b5c | 2019-03-04 22:37:59 +0100 | [diff] [blame] | 37 | #include <osmocom/hnbap/CN-DomainIndicator.h> |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 38 | |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 39 | /*********************************************************************** |
| 40 | * Outbound RANAP RESET to CN |
| 41 | ***********************************************************************/ |
| 42 | |
Harald Welte | da86fe5 | 2017-11-21 08:14:37 +0100 | [diff] [blame] | 43 | 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] | 44 | |
Neels Hofmeyr | 0f88c11 | 2017-07-03 16:49:43 +0200 | [diff] [blame] | 45 | static int transmit_rst(struct hnb_gw *gw, RANAP_CN_DomainIndicator_t domain, |
| 46 | struct osmo_sccp_addr *remote_addr) |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 47 | { |
| 48 | struct msgb *msg; |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 49 | RANAP_Cause_t cause = { |
| 50 | .present = RANAP_Cause_PR_transmissionNetwork, |
| 51 | .choice. transmissionNetwork = RANAP_CauseTransmissionNetwork_signalling_transport_resource_failure, |
| 52 | }; |
| 53 | |
Neels Hofmeyr | 39d7b5c | 2019-03-04 22:37:59 +0100 | [diff] [blame] | 54 | LOGP(DRANAP, LOGL_NOTICE, "Tx RESET to %s %s\n", |
| 55 | domain == CN_DomainIndicator_cs_domain ? "IuCS" : "IuPS", |
| 56 | osmo_sccp_inst_addr_name(gw->sccp.cnlink->sccp, remote_addr)); |
| 57 | |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 58 | msg = ranap_new_msg_reset(domain, &cause); |
| 59 | |
Neels Hofmeyr | 0f88c11 | 2017-07-03 16:49:43 +0200 | [diff] [blame] | 60 | return osmo_sccp_tx_unitdata_msg(gw->sccp.cnlink->sccp_user, |
| 61 | &gw->sccp.local_addr, |
| 62 | remote_addr, |
| 63 | msg); |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 64 | } |
| 65 | |
Neels Hofmeyr | e22027a | 2019-03-04 22:32:42 +0100 | [diff] [blame] | 66 | static int transmit_reset_ack(struct hnb_gw *gw, RANAP_CN_DomainIndicator_t domain, |
| 67 | const struct osmo_sccp_addr *remote_addr) |
| 68 | { |
| 69 | struct msgb *msg; |
| 70 | |
| 71 | LOGP(DRANAP, LOGL_NOTICE, "Tx RESET ACK to %s %s\n", |
| 72 | domain == CN_DomainIndicator_cs_domain ? "IuCS" : "IuPS", |
| 73 | osmo_sccp_inst_addr_name(gw->sccp.cnlink->sccp, remote_addr)); |
| 74 | |
| 75 | msg = ranap_new_msg_reset_ack(domain, NULL); |
| 76 | |
| 77 | return osmo_sccp_tx_unitdata_msg(gw->sccp.cnlink->sccp_user, |
| 78 | &gw->sccp.local_addr, |
| 79 | remote_addr, |
| 80 | msg); |
| 81 | } |
| 82 | |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 83 | /* Timer callback once T_RafC expires */ |
| 84 | static void cnlink_trafc_cb(void *data) |
| 85 | { |
Neels Hofmeyr | 0f88c11 | 2017-07-03 16:49:43 +0200 | [diff] [blame] | 86 | struct hnb_gw *gw = data; |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 87 | |
Neels Hofmeyr | ecbdc5c | 2017-07-31 13:13:24 +0200 | [diff] [blame] | 88 | transmit_rst(gw, RANAP_CN_DomainIndicator_cs_domain, &gw->sccp.iucs_remote_addr); |
| 89 | 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] | 90 | 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] | 91 | /* The spec states that we should abandon after a configurable |
| 92 | * number of times. We decide to simply continue trying */ |
| 93 | } |
| 94 | |
| 95 | /* change the state of a CN Link */ |
Harald Welte | da86fe5 | 2017-11-21 08:14:37 +0100 | [diff] [blame] | 96 | 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] | 97 | { |
| 98 | switch (state) { |
| 99 | case CNLINK_S_NULL: |
| 100 | case CNLINK_S_EST_PEND: |
| 101 | break; |
| 102 | case CNLINK_S_EST_CONF: |
Neels Hofmeyr | 0f88c11 | 2017-07-03 16:49:43 +0200 | [diff] [blame] | 103 | cnlink_trafc_cb(cnlink->gw); |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 104 | break; |
| 105 | case CNLINK_S_EST_RST_TX_WAIT_ACK: |
| 106 | osmo_timer_schedule(&cnlink->T_RafC, 5, 0); |
| 107 | break; |
| 108 | case CNLINK_S_EST_ACTIVE: |
| 109 | osmo_timer_del(&cnlink->T_RafC); |
| 110 | break; |
| 111 | } |
| 112 | } |
| 113 | |
| 114 | /*********************************************************************** |
| 115 | * Incoming primitives from SCCP User SAP |
| 116 | ***********************************************************************/ |
| 117 | |
| 118 | static int cn_ranap_rx_reset_cmd(struct hnbgw_cnlink *cnlink, |
Neels Hofmeyr | e22027a | 2019-03-04 22:32:42 +0100 | [diff] [blame] | 119 | const struct osmo_scu_unitdata_param *unitdata, |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 120 | RANAP_InitiatingMessage_t *imsg) |
| 121 | { |
Neels Hofmeyr | e22027a | 2019-03-04 22:32:42 +0100 | [diff] [blame] | 122 | CN_DomainIndicator_t domain; |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 123 | RANAP_ResetIEs_t ies; |
| 124 | int rc; |
| 125 | |
| 126 | rc = ranap_decode_reseties(&ies, &imsg->value); |
Neels Hofmeyr | e22027a | 2019-03-04 22:32:42 +0100 | [diff] [blame] | 127 | domain = ies.cN_DomainIndicator; |
Daniel Willmann | 11e912a | 2016-01-07 13:19:30 +0100 | [diff] [blame] | 128 | ranap_free_reseties(&ies); |
Neels Hofmeyr | e22027a | 2019-03-04 22:32:42 +0100 | [diff] [blame] | 129 | |
| 130 | LOGP(DRANAP, LOGL_NOTICE, "Rx RESET from %s %s, returning ACK\n", |
| 131 | domain == CN_DomainIndicator_cs_domain ? "IuCS" : "IuPS", |
| 132 | osmo_sccp_inst_addr_name(cnlink->sccp, &unitdata->calling_addr)); |
| 133 | |
| 134 | /* FIXME: actually reset connections, if any */ |
| 135 | |
| 136 | if (transmit_reset_ack(cnlink->gw, domain, &unitdata->calling_addr)) |
| 137 | LOGP(DRANAP, LOGL_ERROR, "Error: cannot send RESET ACK to %s %s\n", |
| 138 | domain == CN_DomainIndicator_cs_domain ? "IuCS" : "IuPS", |
| 139 | osmo_sccp_inst_addr_name(cnlink->sccp, &unitdata->calling_addr)); |
| 140 | |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 141 | return rc; |
| 142 | } |
| 143 | |
| 144 | static int cn_ranap_rx_reset_ack(struct hnbgw_cnlink *cnlink, |
| 145 | RANAP_SuccessfulOutcome_t *omsg) |
| 146 | { |
| 147 | RANAP_ResetAcknowledgeIEs_t ies; |
| 148 | int rc; |
| 149 | |
| 150 | rc = ranap_decode_resetacknowledgeies(&ies, &omsg->value); |
| 151 | |
| 152 | hnbgw_cnlink_change_state(cnlink, CNLINK_S_EST_ACTIVE); |
| 153 | |
Daniel Willmann | 11e912a | 2016-01-07 13:19:30 +0100 | [diff] [blame] | 154 | ranap_free_resetacknowledgeies(&ies); |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 155 | return rc; |
| 156 | } |
| 157 | |
| 158 | static int cn_ranap_rx_paging_cmd(struct hnbgw_cnlink *cnlink, |
Harald Welte | bc4560c | 2015-12-24 08:46:58 +0100 | [diff] [blame] | 159 | RANAP_InitiatingMessage_t *imsg, |
| 160 | const uint8_t *data, unsigned int len) |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 161 | { |
Neels Hofmeyr | 2b01f3a | 2016-04-19 17:57:03 +0200 | [diff] [blame] | 162 | struct hnb_gw *gw = cnlink->gw; |
Harald Welte | bc4560c | 2015-12-24 08:46:58 +0100 | [diff] [blame] | 163 | struct hnb_context *hnb; |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 164 | RANAP_PagingIEs_t ies; |
Harald Welte | da86fe5 | 2017-11-21 08:14:37 +0100 | [diff] [blame] | 165 | int rc; |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 166 | |
| 167 | rc = ranap_decode_pagingies(&ies, &imsg->value); |
Harald Welte | da86fe5 | 2017-11-21 08:14:37 +0100 | [diff] [blame] | 168 | if (rc < 0) |
| 169 | return rc; |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 170 | |
Harald Welte | bc4560c | 2015-12-24 08:46:58 +0100 | [diff] [blame] | 171 | /* FIXME: determine which HNBs to send this Paging command, |
| 172 | * rather than broadcasting to all HNBs */ |
| 173 | llist_for_each_entry(hnb, &gw->hnb_list, list) { |
| 174 | rc = rua_tx_udt(hnb, data, len); |
| 175 | } |
Daniel Willmann | 11e912a | 2016-01-07 13:19:30 +0100 | [diff] [blame] | 176 | |
| 177 | ranap_free_pagingies(&ies); |
Harald Welte | bc4560c | 2015-12-24 08:46:58 +0100 | [diff] [blame] | 178 | return 0; |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 179 | } |
| 180 | |
| 181 | static int cn_ranap_rx_initiating_msg(struct hnbgw_cnlink *cnlink, |
Neels Hofmeyr | e22027a | 2019-03-04 22:32:42 +0100 | [diff] [blame] | 182 | const struct osmo_scu_unitdata_param *unitdata, |
Harald Welte | bc4560c | 2015-12-24 08:46:58 +0100 | [diff] [blame] | 183 | RANAP_InitiatingMessage_t *imsg, |
| 184 | const uint8_t *data, unsigned int len) |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 185 | { |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 186 | switch (imsg->procedureCode) { |
| 187 | case RANAP_ProcedureCode_id_Reset: |
Neels Hofmeyr | e22027a | 2019-03-04 22:32:42 +0100 | [diff] [blame] | 188 | return cn_ranap_rx_reset_cmd(cnlink, unitdata, imsg); |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 189 | case RANAP_ProcedureCode_id_Paging: |
Harald Welte | bc4560c | 2015-12-24 08:46:58 +0100 | [diff] [blame] | 190 | return cn_ranap_rx_paging_cmd(cnlink, imsg, data, len); |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 191 | case RANAP_ProcedureCode_id_OverloadControl: /* Overload ind */ |
| 192 | break; |
| 193 | case RANAP_ProcedureCode_id_ErrorIndication: /* Error ind */ |
| 194 | break; |
| 195 | case RANAP_ProcedureCode_id_ResetResource: /* request */ |
| 196 | case RANAP_ProcedureCode_id_InformationTransfer: |
| 197 | case RANAP_ProcedureCode_id_DirectInformationTransfer: |
| 198 | case RANAP_ProcedureCode_id_UplinkInformationExchange: |
| 199 | LOGP(DRANAP, LOGL_NOTICE, "Received unsupported RANAP " |
Harald Welte | da86fe5 | 2017-11-21 08:14:37 +0100 | [diff] [blame] | 200 | "Procedure %ld from CN, ignoring\n", imsg->procedureCode); |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 201 | break; |
| 202 | default: |
| 203 | LOGP(DRANAP, LOGL_NOTICE, "Received suspicious RANAP " |
Harald Welte | da86fe5 | 2017-11-21 08:14:37 +0100 | [diff] [blame] | 204 | "Procedure %ld from CN, ignoring\n", imsg->procedureCode); |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 205 | break; |
| 206 | } |
| 207 | return 0; |
| 208 | } |
| 209 | |
| 210 | static int cn_ranap_rx_successful_msg(struct hnbgw_cnlink *cnlink, |
| 211 | RANAP_SuccessfulOutcome_t *omsg) |
| 212 | { |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 213 | switch (omsg->procedureCode) { |
| 214 | case RANAP_ProcedureCode_id_Reset: /* Reset acknowledge */ |
| 215 | return cn_ranap_rx_reset_ack(cnlink, omsg); |
| 216 | case RANAP_ProcedureCode_id_ResetResource: /* response */ |
| 217 | case RANAP_ProcedureCode_id_InformationTransfer: |
| 218 | case RANAP_ProcedureCode_id_DirectInformationTransfer: |
| 219 | case RANAP_ProcedureCode_id_UplinkInformationExchange: |
| 220 | LOGP(DRANAP, LOGL_NOTICE, "Received unsupported RANAP " |
Harald Welte | da86fe5 | 2017-11-21 08:14:37 +0100 | [diff] [blame] | 221 | "Procedure %ld from CN, ignoring\n", omsg->procedureCode); |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 222 | break; |
| 223 | default: |
| 224 | LOGP(DRANAP, LOGL_NOTICE, "Received suspicious RANAP " |
Harald Welte | da86fe5 | 2017-11-21 08:14:37 +0100 | [diff] [blame] | 225 | "Procedure %ld from CN, ignoring\n", omsg->procedureCode); |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 226 | break; |
| 227 | } |
| 228 | return 0; |
| 229 | } |
| 230 | |
| 231 | |
Neels Hofmeyr | e22027a | 2019-03-04 22:32:42 +0100 | [diff] [blame] | 232 | static int _cn_ranap_rx(struct hnbgw_cnlink *cnlink, |
| 233 | const struct osmo_scu_unitdata_param *unitdata, |
| 234 | RANAP_RANAP_PDU_t *pdu, const uint8_t *data, unsigned int len) |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 235 | { |
| 236 | int rc; |
| 237 | |
| 238 | switch (pdu->present) { |
| 239 | case RANAP_RANAP_PDU_PR_initiatingMessage: |
Neels Hofmeyr | e22027a | 2019-03-04 22:32:42 +0100 | [diff] [blame] | 240 | rc = cn_ranap_rx_initiating_msg(cnlink, unitdata, &pdu->choice.initiatingMessage, |
Harald Welte | bc4560c | 2015-12-24 08:46:58 +0100 | [diff] [blame] | 241 | data, len); |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 242 | break; |
| 243 | case RANAP_RANAP_PDU_PR_successfulOutcome: |
| 244 | rc = cn_ranap_rx_successful_msg(cnlink, &pdu->choice.successfulOutcome); |
| 245 | break; |
| 246 | case RANAP_RANAP_PDU_PR_unsuccessfulOutcome: |
| 247 | LOGP(DRANAP, LOGL_NOTICE, "Received unsupported RANAP " |
Harald Welte | da86fe5 | 2017-11-21 08:14:37 +0100 | [diff] [blame] | 248 | "unsuccessful outcome procedure %ld from CN, ignoring\n", |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 249 | pdu->choice.unsuccessfulOutcome.procedureCode); |
Neels Hofmeyr | e3644ac | 2018-01-15 23:25:42 +0100 | [diff] [blame] | 250 | rc = -ENOTSUP; |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 251 | break; |
| 252 | default: |
| 253 | LOGP(DRANAP, LOGL_NOTICE, "Received suspicious RANAP " |
| 254 | "presence %u from CN, ignoring\n", pdu->present); |
Neels Hofmeyr | e3644ac | 2018-01-15 23:25:42 +0100 | [diff] [blame] | 255 | rc = -EINVAL; |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 256 | break; |
| 257 | } |
Harald Welte | da86fe5 | 2017-11-21 08:14:37 +0100 | [diff] [blame] | 258 | |
| 259 | return rc; |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 260 | } |
| 261 | |
Neels Hofmeyr | e22027a | 2019-03-04 22:32:42 +0100 | [diff] [blame] | 262 | static int handle_cn_ranap(struct hnbgw_cnlink *cnlink, const struct osmo_scu_unitdata_param *unitdata, |
| 263 | const uint8_t *data, unsigned int len) |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 264 | { |
| 265 | RANAP_RANAP_PDU_t _pdu, *pdu = &_pdu; |
| 266 | asn_dec_rval_t dec_ret; |
| 267 | int rc; |
| 268 | |
| 269 | memset(pdu, 0, sizeof(*pdu)); |
| 270 | dec_ret = aper_decode(NULL,&asn_DEF_RANAP_RANAP_PDU, (void **) &pdu, |
| 271 | data, len, 0, 0); |
| 272 | if (dec_ret.code != RC_OK) { |
| 273 | LOGP(DRANAP, LOGL_ERROR, "Error in RANAP ASN.1 decode\n"); |
Neels Hofmeyr | a6a68e6 | 2016-11-25 13:21:02 +0100 | [diff] [blame] | 274 | return -1; |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 275 | } |
| 276 | |
Neels Hofmeyr | e22027a | 2019-03-04 22:32:42 +0100 | [diff] [blame] | 277 | rc = _cn_ranap_rx(cnlink, unitdata, pdu, data, len); |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 278 | |
| 279 | return rc; |
| 280 | } |
| 281 | |
Neels Hofmeyr | a3bcd6d | 2017-07-03 14:29:04 +0200 | [diff] [blame] | 282 | static bool pc_and_ssn_match(const struct osmo_sccp_addr *a, const struct osmo_sccp_addr *b) |
| 283 | { |
| 284 | return (a == b) |
| 285 | || ((a->pc == b->pc) |
| 286 | && (a->ssn == b->ssn)); |
| 287 | } |
| 288 | |
| 289 | static int classify_cn_remote_addr(const struct hnb_gw *gw, |
| 290 | const struct osmo_sccp_addr *cn_remote_addr, |
| 291 | bool *is_ps) |
| 292 | { |
Neels Hofmeyr | ecbdc5c | 2017-07-31 13:13:24 +0200 | [diff] [blame] | 293 | 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] | 294 | if (is_ps) |
| 295 | *is_ps = false; |
| 296 | return 0; |
| 297 | } |
Neels Hofmeyr | ecbdc5c | 2017-07-31 13:13:24 +0200 | [diff] [blame] | 298 | 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] | 299 | if (is_ps) |
| 300 | *is_ps = true; |
| 301 | return 0; |
| 302 | } |
| 303 | LOGP(DMAIN, LOGL_ERROR, "Unexpected remote address, matches neither CS nor PS address: %s\n", |
| 304 | osmo_sccp_addr_dump(cn_remote_addr)); |
| 305 | return -1; |
| 306 | } |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 307 | |
| 308 | static int handle_cn_unitdata(struct hnbgw_cnlink *cnlink, |
| 309 | const struct osmo_scu_unitdata_param *param, |
| 310 | struct osmo_prim_hdr *oph) |
| 311 | { |
Harald Welte | 8c572fe | 2015-12-26 08:42:07 +0100 | [diff] [blame] | 312 | if (param->called_addr.ssn != OSMO_SCCP_SSN_RANAP) { |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 313 | LOGP(DMAIN, LOGL_NOTICE, "N-UNITDATA.ind for unknown SSN %u\n", |
| 314 | param->called_addr.ssn); |
| 315 | return -1; |
| 316 | } |
| 317 | |
Neels Hofmeyr | a3bcd6d | 2017-07-03 14:29:04 +0200 | [diff] [blame] | 318 | if (classify_cn_remote_addr(cnlink->gw, ¶m->calling_addr, NULL) < 0) |
| 319 | return -1; |
| 320 | |
Neels Hofmeyr | e22027a | 2019-03-04 22:32:42 +0100 | [diff] [blame] | 321 | return handle_cn_ranap(cnlink, param, msgb_l2(oph->msg), msgb_l2len(oph->msg)); |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 322 | } |
| 323 | |
Neels Hofmeyr | 6503767 | 2016-04-19 18:00:54 +0200 | [diff] [blame] | 324 | static int handle_cn_conn_conf(struct hnbgw_cnlink *cnlink, |
Neels Hofmeyr | 630483b | 2016-04-19 18:01:25 +0200 | [diff] [blame] | 325 | const struct osmo_scu_connect_param *param, |
| 326 | struct osmo_prim_hdr *oph) |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 327 | { |
| 328 | /* we don't actually need to do anything, as RUA towards the HNB |
| 329 | * doesn't seem to know any confirmations to its CONNECT |
| 330 | * operation */ |
| 331 | |
Neels Hofmeyr | 0ff2443 | 2016-04-04 18:33:33 +0200 | [diff] [blame] | 332 | LOGP(DMAIN, LOGL_DEBUG, "handle_cn_conn_conf() conn_id=%d\n", |
| 333 | param->conn_id); |
| 334 | LOGP(DMAIN, LOGL_DEBUG, "handle_cn_conn_conf() called_addr=%s\n", |
| 335 | inet_ntoa(param->called_addr.ip.v4)); |
| 336 | LOGP(DMAIN, LOGL_DEBUG, "handle_cn_conn_conf() calling_addr=%s\n", |
| 337 | inet_ntoa(param->calling_addr.ip.v4)); |
| 338 | LOGP(DMAIN, LOGL_DEBUG, "handle_cn_conn_conf() responding_addr=%s\n", |
| 339 | inet_ntoa(param->responding_addr.ip.v4)); |
| 340 | |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 341 | return 0; |
| 342 | } |
| 343 | |
Neels Hofmeyr | 6503767 | 2016-04-19 18:00:54 +0200 | [diff] [blame] | 344 | static int handle_cn_data_ind(struct hnbgw_cnlink *cnlink, |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 345 | const struct osmo_scu_data_param *param, |
| 346 | struct osmo_prim_hdr *oph) |
| 347 | { |
| 348 | struct hnbgw_context_map *map; |
| 349 | |
| 350 | /* connection-oriented data is always passed transparently |
| 351 | * towards the specific HNB, via a RUA connection identified by |
| 352 | * conn_id */ |
| 353 | |
| 354 | map = context_map_by_cn(cnlink, param->conn_id); |
| 355 | if (!map) { |
| 356 | /* FIXME: Return an error / released primitive */ |
| 357 | return 0; |
| 358 | } |
| 359 | |
Neels Hofmeyr | 0f88c11 | 2017-07-03 16:49:43 +0200 | [diff] [blame] | 360 | 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] | 361 | msgb_l2(oph->msg), msgb_l2len(oph->msg)); |
| 362 | } |
| 363 | |
Neels Hofmeyr | 6503767 | 2016-04-19 18:00:54 +0200 | [diff] [blame] | 364 | static int handle_cn_disc_ind(struct hnbgw_cnlink *cnlink, |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 365 | const struct osmo_scu_disconn_param *param, |
| 366 | struct osmo_prim_hdr *oph) |
| 367 | { |
| 368 | struct hnbgw_context_map *map; |
| 369 | |
Neels Hofmeyr | 02be4e3 | 2016-04-04 19:29:35 +0200 | [diff] [blame] | 370 | LOGP(DMAIN, LOGL_DEBUG, "handle_cn_disc_ind() conn_id=%d originator=%d\n", |
| 371 | param->conn_id, param->originator); |
| 372 | LOGP(DMAIN, LOGL_DEBUG, "handle_cn_disc_ind() responding_addr=%s\n", |
| 373 | inet_ntoa(param->responding_addr.ip.v4)); |
| 374 | |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 375 | RUA_Cause_t rua_cause = { |
| 376 | .present = RUA_Cause_PR_NOTHING, |
| 377 | /* FIXME: Convert incoming SCCP cause to RUA cause */ |
| 378 | }; |
| 379 | |
| 380 | /* we need to notify the HNB associated with this connection via |
| 381 | * a RUA DISCONNECT */ |
| 382 | |
| 383 | map = context_map_by_cn(cnlink, param->conn_id); |
| 384 | if (!map) { |
| 385 | /* FIXME: Return an error / released primitive */ |
| 386 | return 0; |
| 387 | } |
| 388 | |
Neels Hofmeyr | 0f88c11 | 2017-07-03 16:49:43 +0200 | [diff] [blame] | 389 | 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] | 390 | &rua_cause, msgb_l2(oph->msg), msgb_l2len(oph->msg)); |
| 391 | } |
| 392 | |
| 393 | /* Entry point for primitives coming up from SCCP User SAP */ |
Neels Hofmeyr | a1bf4f3 | 2016-07-07 15:36:07 +0200 | [diff] [blame] | 394 | static int sccp_sap_up(struct osmo_prim_hdr *oph, void *ctx) |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 395 | { |
Neels Hofmeyr | 0f88c11 | 2017-07-03 16:49:43 +0200 | [diff] [blame] | 396 | struct osmo_sccp_user *scu = ctx; |
Neels Hofmeyr | cb24631 | 2017-06-20 22:49:34 +0200 | [diff] [blame] | 397 | struct hnbgw_cnlink *cnlink; |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 398 | struct osmo_scu_prim *prim = (struct osmo_scu_prim *) oph; |
Harald Welte | da86fe5 | 2017-11-21 08:14:37 +0100 | [diff] [blame] | 399 | int rc = 0; |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 400 | |
| 401 | LOGP(DMAIN, LOGL_DEBUG, "sccp_sap_up(%s)\n", osmo_scu_prim_name(oph)); |
| 402 | |
Neels Hofmeyr | cb24631 | 2017-06-20 22:49:34 +0200 | [diff] [blame] | 403 | if (!scu) { |
| 404 | LOGP(DMAIN, LOGL_ERROR, |
| 405 | "sccp_sap_up(): NULL osmo_sccp_user, cannot send prim (sap %u prim %u op %d)\n", |
| 406 | oph->sap, oph->primitive, oph->operation); |
| 407 | return -1; |
| 408 | } |
| 409 | |
| 410 | cnlink = osmo_sccp_user_get_priv(scu); |
| 411 | if (!cnlink) { |
| 412 | LOGP(DMAIN, LOGL_ERROR, |
| 413 | "sccp_sap_up(): NULL hnbgw_cnlink, cannot send prim (sap %u prim %u op %d)\n", |
| 414 | oph->sap, oph->primitive, oph->operation); |
| 415 | return -1; |
| 416 | } |
| 417 | |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 418 | switch (OSMO_PRIM_HDR(oph)) { |
| 419 | case OSMO_PRIM(OSMO_SCU_PRIM_N_UNITDATA, PRIM_OP_INDICATION): |
Neels Hofmeyr | 6503767 | 2016-04-19 18:00:54 +0200 | [diff] [blame] | 420 | rc = handle_cn_unitdata(cnlink, &prim->u.unitdata, oph); |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 421 | break; |
| 422 | case OSMO_PRIM(OSMO_SCU_PRIM_N_CONNECT, PRIM_OP_CONFIRM): |
Neels Hofmeyr | 6503767 | 2016-04-19 18:00:54 +0200 | [diff] [blame] | 423 | rc = handle_cn_conn_conf(cnlink, &prim->u.connect, oph); |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 424 | break; |
| 425 | case OSMO_PRIM(OSMO_SCU_PRIM_N_DATA, PRIM_OP_INDICATION): |
Neels Hofmeyr | 6503767 | 2016-04-19 18:00:54 +0200 | [diff] [blame] | 426 | rc = handle_cn_data_ind(cnlink, &prim->u.data, oph); |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 427 | break; |
| 428 | case OSMO_PRIM(OSMO_SCU_PRIM_N_DISCONNECT, PRIM_OP_INDICATION): |
Neels Hofmeyr | 6503767 | 2016-04-19 18:00:54 +0200 | [diff] [blame] | 429 | rc = handle_cn_disc_ind(cnlink, &prim->u.disconnect, oph); |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 430 | break; |
Harald Welte | ffc2093 | 2017-11-21 08:09:40 +0100 | [diff] [blame] | 431 | default: |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 432 | LOGP(DMAIN, LOGL_ERROR, |
| 433 | "Received unknown prim %u from SCCP USER SAP\n", |
| 434 | OSMO_PRIM_HDR(oph)); |
| 435 | break; |
| 436 | } |
| 437 | |
| 438 | msgb_free(oph->msg); |
| 439 | |
Harald Welte | da86fe5 | 2017-11-21 08:14:37 +0100 | [diff] [blame] | 440 | return rc; |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 441 | } |
| 442 | |
Neels Hofmeyr | ecbdc5c | 2017-07-31 13:13:24 +0200 | [diff] [blame] | 443 | 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] | 444 | { |
Neels Hofmeyr | ecbdc5c | 2017-07-31 13:13:24 +0200 | [diff] [blame] | 445 | if (!(addr->presence & OSMO_SCCP_ADDR_T_SSN)) |
| 446 | return false; |
| 447 | if (!(addr->presence & OSMO_SCCP_ADDR_T_PC)) |
| 448 | return false; |
| 449 | return true; |
| 450 | } |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 451 | |
Neels Hofmeyr | ecbdc5c | 2017-07-31 13:13:24 +0200 | [diff] [blame] | 452 | static int resolve_addr_name(struct osmo_sccp_addr *dest, struct osmo_ss7_instance **ss7, |
Neels Hofmeyr | 2af648f | 2017-11-23 00:39:53 +0100 | [diff] [blame] | 453 | const char *addr_name, const char *label, |
| 454 | uint32_t default_pc) |
Neels Hofmeyr | ecbdc5c | 2017-07-31 13:13:24 +0200 | [diff] [blame] | 455 | { |
| 456 | struct osmo_ss7_instance *ss7_tmp; |
Neels Hofmeyr | 0f88c11 | 2017-07-03 16:49:43 +0200 | [diff] [blame] | 457 | |
Neels Hofmeyr | ecbdc5c | 2017-07-31 13:13:24 +0200 | [diff] [blame] | 458 | if (!addr_name) { |
Neels Hofmeyr | 2af648f | 2017-11-23 00:39:53 +0100 | [diff] [blame] | 459 | osmo_sccp_make_addr_pc_ssn(dest, default_pc, OSMO_SCCP_SSN_RANAP); |
| 460 | LOGP(DMAIN, LOGL_INFO, "%s remote addr not configured, using default: %s\n", label, |
| 461 | osmo_sccp_addr_name(*ss7, dest)); |
| 462 | return 0; |
Neels Hofmeyr | 0f88c11 | 2017-07-03 16:49:43 +0200 | [diff] [blame] | 463 | } |
| 464 | |
Neels Hofmeyr | ecbdc5c | 2017-07-31 13:13:24 +0200 | [diff] [blame] | 465 | ss7_tmp = osmo_sccp_addr_by_name(dest, addr_name); |
| 466 | if (!ss7_tmp) { |
| 467 | LOGP(DMAIN, LOGL_ERROR, "%s remote addr: no such SCCP address book entry: '%s'\n", |
| 468 | label, addr_name); |
| 469 | return -1; |
| 470 | } |
Neels Hofmeyr | 0f88c11 | 2017-07-03 16:49:43 +0200 | [diff] [blame] | 471 | |
Neels Hofmeyr | ecbdc5c | 2017-07-31 13:13:24 +0200 | [diff] [blame] | 472 | if (*ss7 && (*ss7 != ss7_tmp)) { |
| 473 | LOGP(DMAIN, LOGL_ERROR, "IuCS and IuPS cannot be served from separate CS7 instances," |
| 474 | " cs7 instance %d != %d\n", (*ss7)->cfg.id, ss7_tmp->cfg.id); |
| 475 | return -1; |
| 476 | } |
| 477 | |
| 478 | *ss7 = ss7_tmp; |
| 479 | |
| 480 | osmo_sccp_addr_set_ssn(dest, OSMO_SCCP_SSN_RANAP); |
| 481 | |
| 482 | if (!addr_has_pc_and_ssn(dest)) { |
| 483 | LOGP(DMAIN, LOGL_ERROR, "Invalid/incomplete %s remote-addr: %s\n", |
Alexander Couzens | e03d8a0 | 2017-08-15 12:19:45 +0000 | [diff] [blame] | 484 | label, osmo_sccp_addr_name(*ss7, dest)); |
Neels Hofmeyr | ecbdc5c | 2017-07-31 13:13:24 +0200 | [diff] [blame] | 485 | return -1; |
| 486 | } |
| 487 | |
| 488 | LOGP(DRANAP, LOGL_NOTICE, "Remote %s SCCP addr: %s\n", |
| 489 | label, osmo_sccp_addr_name(*ss7, dest)); |
| 490 | return 0; |
| 491 | } |
| 492 | |
| 493 | int hnbgw_cnlink_init(struct hnb_gw *gw, const char *stp_host, uint16_t stp_port, const char *local_ip) |
| 494 | { |
| 495 | struct hnbgw_cnlink *cnlink; |
| 496 | struct osmo_ss7_instance *ss7; |
| 497 | uint32_t local_pc; |
Neels Hofmeyr | ecbdc5c | 2017-07-31 13:13:24 +0200 | [diff] [blame] | 498 | |
| 499 | OSMO_ASSERT(!gw->sccp.client); |
| 500 | OSMO_ASSERT(!gw->sccp.cnlink); |
| 501 | |
| 502 | ss7 = NULL; |
| 503 | if (resolve_addr_name(&gw->sccp.iucs_remote_addr, &ss7, |
Neels Hofmeyr | 2af648f | 2017-11-23 00:39:53 +0100 | [diff] [blame] | 504 | gw->config.iucs_remote_addr_name, "IuCS", (23 << 3) + 1)) |
Neels Hofmeyr | ecbdc5c | 2017-07-31 13:13:24 +0200 | [diff] [blame] | 505 | return -1; |
| 506 | if (resolve_addr_name(&gw->sccp.iups_remote_addr, &ss7, |
Neels Hofmeyr | 2af648f | 2017-11-23 00:39:53 +0100 | [diff] [blame] | 507 | gw->config.iups_remote_addr_name, "IuPS", (23 << 3) + 4)) |
Neels Hofmeyr | ecbdc5c | 2017-07-31 13:13:24 +0200 | [diff] [blame] | 508 | return -1; |
| 509 | |
Neels Hofmeyr | 2af648f | 2017-11-23 00:39:53 +0100 | [diff] [blame] | 510 | if (!ss7) { |
| 511 | LOGP(DRANAP, LOGL_NOTICE, "No cs7 instance configured for IuCS nor IuPS," |
| 512 | " creating default instance\n"); |
| 513 | ss7 = osmo_ss7_instance_find_or_create(gw, 0); |
| 514 | ss7->cfg.primary_pc = (23 << 3) + 5; |
| 515 | } |
| 516 | |
Neels Hofmeyr | ecbdc5c | 2017-07-31 13:13:24 +0200 | [diff] [blame] | 517 | if (!osmo_ss7_pc_is_valid(ss7->cfg.primary_pc)) { |
| 518 | LOGP(DMAIN, LOGL_ERROR, "IuCS/IuPS uplink cannot be setup: CS7 instance %d has no point-code set\n", |
| 519 | ss7->cfg.id); |
| 520 | return -1; |
| 521 | } |
| 522 | local_pc = ss7->cfg.primary_pc; |
| 523 | |
| 524 | 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] | 525 | LOGP(DRANAP, LOGL_NOTICE, "Local SCCP addr: %s\n", osmo_sccp_addr_name(ss7, &gw->sccp.local_addr)); |
| 526 | |
| 527 | gw->sccp.client = osmo_sccp_simple_client_on_ss7_id(gw, ss7->cfg.id, "OsmoHNBGW", |
| 528 | local_pc, OSMO_SS7_ASP_PROT_M3UA, |
| 529 | 0, local_ip, stp_port, stp_host); |
| 530 | if (!gw->sccp.client) { |
| 531 | LOGP(DMAIN, LOGL_ERROR, "Failed to init SCCP Client\n"); |
| 532 | return -1; |
| 533 | } |
Neels Hofmeyr | 0f88c11 | 2017-07-03 16:49:43 +0200 | [diff] [blame] | 534 | |
| 535 | cnlink = talloc_zero(gw, struct hnbgw_cnlink); |
Neels Hofmeyr | 2b01f3a | 2016-04-19 17:57:03 +0200 | [diff] [blame] | 536 | cnlink->gw = gw; |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 537 | INIT_LLIST_HEAD(&cnlink->map_list); |
| 538 | cnlink->T_RafC.cb = cnlink_trafc_cb; |
Neels Hofmeyr | 0f88c11 | 2017-07-03 16:49:43 +0200 | [diff] [blame] | 539 | cnlink->T_RafC.data = gw; |
Harald Welte | 552fdf1 | 2015-12-26 23:39:30 +0100 | [diff] [blame] | 540 | cnlink->next_conn_id = 1000; |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 541 | |
Neels Hofmeyr | ecbdc5c | 2017-07-31 13:13:24 +0200 | [diff] [blame] | 542 | cnlink->sccp_user = osmo_sccp_user_bind_pc(gw->sccp.client, "OsmoHNBGW", sccp_sap_up, |
| 543 | OSMO_SCCP_SSN_RANAP, gw->sccp.local_addr.pc); |
Neels Hofmeyr | 0f88c11 | 2017-07-03 16:49:43 +0200 | [diff] [blame] | 544 | if (!cnlink->sccp_user) { |
| 545 | LOGP(DMAIN, LOGL_ERROR, "Failed to init SCCP User\n"); |
| 546 | return -1; |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 547 | } |
| 548 | |
Neels Hofmeyr | b593969 | 2017-11-23 00:40:04 +0100 | [diff] [blame] | 549 | LOGP(DRANAP, LOGL_NOTICE, "Remote SCCP addr: IuCS: %s\n", |
| 550 | osmo_sccp_addr_name(ss7, &gw->sccp.iucs_remote_addr)); |
| 551 | LOGP(DRANAP, LOGL_NOTICE, "Remote SCCP addr: IuPS: %s\n", |
| 552 | osmo_sccp_addr_name(ss7, &gw->sccp.iups_remote_addr)); |
| 553 | |
Neels Hofmeyr | 0f88c11 | 2017-07-03 16:49:43 +0200 | [diff] [blame] | 554 | /* In sccp_sap_up() we expect the cnlink in the user's priv. */ |
| 555 | osmo_sccp_user_set_priv(cnlink->sccp_user, cnlink); |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 556 | |
Neels Hofmeyr | 0f88c11 | 2017-07-03 16:49:43 +0200 | [diff] [blame] | 557 | gw->sccp.cnlink = cnlink; |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 558 | |
Neels Hofmeyr | 0f88c11 | 2017-07-03 16:49:43 +0200 | [diff] [blame] | 559 | return 0; |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 560 | } |