Harald Welte | 77847ad | 2015-10-06 22:07:04 +0200 | [diff] [blame] | 1 | /* hnb-gw specific code for RUA (Ranap User Adaption) */ |
| 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 | |
| 21 | |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 22 | #include <osmocom/core/msgb.h> |
| 23 | #include <osmocom/core/utils.h> |
Harald Welte | ffa7c0a | 2015-12-23 00:03:41 +0100 | [diff] [blame] | 24 | #include <osmocom/netif/stream.h> |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 25 | |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 26 | #include <osmocom/sigtran/sccp_sap.h> |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 27 | |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 28 | #include <unistd.h> |
| 29 | #include <errno.h> |
| 30 | #include <string.h> |
| 31 | |
| 32 | #include "asn1helpers.h" |
| 33 | |
Neels Hofmeyr | df63de2 | 2016-08-18 13:13:55 +0200 | [diff] [blame] | 34 | #include <osmocom/iuh/hnbgw.h> |
| 35 | #include <osmocom/iuh/hnbgw_ranap.h> |
Neels Hofmeyr | 8345792 | 2016-08-26 23:56:44 +0200 | [diff] [blame] | 36 | #include <osmocom/rua/rua_common.h> |
| 37 | #include <osmocom/rua/rua_ies_defs.h> |
Neels Hofmeyr | df63de2 | 2016-08-18 13:13:55 +0200 | [diff] [blame] | 38 | #include <osmocom/iuh/context_map.h> |
Neels Hofmeyr | 12ed975 | 2017-07-03 16:33:14 +0200 | [diff] [blame] | 39 | #include <osmocom/hnbap/CN-DomainIndicator.h> |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 40 | |
Neels Hofmeyr | c361431 | 2017-07-03 14:34:38 +0200 | [diff] [blame] | 41 | static const char *cn_domain_indicator_to_str(CN_DomainIndicator_t cN_DomainIndicator) |
| 42 | { |
| 43 | switch (cN_DomainIndicator) { |
| 44 | case RUA_CN_DomainIndicator_cs_domain: |
| 45 | return "IuCS"; |
| 46 | case RUA_CN_DomainIndicator_ps_domain: |
| 47 | return "IuPS"; |
| 48 | default: |
| 49 | return "(unknown-domain)"; |
| 50 | } |
| 51 | } |
| 52 | |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 53 | static int hnbgw_rua_tx(struct hnb_context *ctx, struct msgb *msg) |
| 54 | { |
| 55 | if (!msg) |
| 56 | return -EINVAL; |
| 57 | |
Harald Welte | ffa7c0a | 2015-12-23 00:03:41 +0100 | [diff] [blame] | 58 | msgb_sctp_ppid(msg) = IUH_PPI_RUA; |
Daniel Willmann | 6480cad | 2016-01-06 18:06:26 +0100 | [diff] [blame] | 59 | osmo_stream_srv_send(ctx->conn, msg); |
| 60 | |
| 61 | return 0; |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 62 | } |
| 63 | |
Harald Welte | cd5e981 | 2015-12-23 22:14:16 +0100 | [diff] [blame] | 64 | int rua_tx_udt(struct hnb_context *hnb, const uint8_t *data, unsigned int len) |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 65 | { |
Harald Welte | e2e5d4d | 2015-09-10 23:49:45 +0200 | [diff] [blame] | 66 | RUA_ConnectionlessTransfer_t out; |
| 67 | RUA_ConnectionlessTransferIEs_t ies; |
| 68 | struct msgb *msg; |
| 69 | int rc; |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 70 | |
Harald Welte | e2e5d4d | 2015-09-10 23:49:45 +0200 | [diff] [blame] | 71 | memset(&ies, 0, sizeof(ies)); |
Harald Welte | cd5e981 | 2015-12-23 22:14:16 +0100 | [diff] [blame] | 72 | ies.ranaP_Message.buf = (uint8_t *) data; |
| 73 | ies.ranaP_Message.size = len; |
Harald Welte | e2e5d4d | 2015-09-10 23:49:45 +0200 | [diff] [blame] | 74 | |
| 75 | /* FIXME: msgb_free(msg)? ownership not yet clear */ |
| 76 | |
| 77 | memset(&out, 0, sizeof(out)); |
| 78 | rc = rua_encode_connectionlesstransferies(&out, &ies); |
| 79 | if (rc < 0) |
| 80 | return rc; |
| 81 | |
| 82 | msg = rua_generate_initiating_message(RUA_ProcedureCode_id_ConnectionlessTransfer, |
| 83 | RUA_Criticality_reject, |
| 84 | &asn_DEF_RUA_ConnectionlessTransfer, |
| 85 | &out); |
Harald Welte | cd5e981 | 2015-12-23 22:14:16 +0100 | [diff] [blame] | 86 | ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_RUA_ConnectionlessTransfer, &out); |
Harald Welte | e2e5d4d | 2015-09-10 23:49:45 +0200 | [diff] [blame] | 87 | |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 88 | DEBUGP(DRUA, "transmitting RUA payload of %u bytes\n", msgb_length(msg)); |
Harald Welte | e2e5d4d | 2015-09-10 23:49:45 +0200 | [diff] [blame] | 89 | |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 90 | return hnbgw_rua_tx(hnb, msg); |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 91 | } |
| 92 | |
Harald Welte | cd5e981 | 2015-12-23 22:14:16 +0100 | [diff] [blame] | 93 | int rua_tx_dt(struct hnb_context *hnb, int is_ps, uint32_t context_id, |
| 94 | const uint8_t *data, unsigned int len) |
Harald Welte | 0f0ea81 | 2015-09-11 18:58:28 +0200 | [diff] [blame] | 95 | { |
| 96 | RUA_DirectTransfer_t out; |
| 97 | RUA_DirectTransferIEs_t ies; |
Harald Welte | cd5e981 | 2015-12-23 22:14:16 +0100 | [diff] [blame] | 98 | uint32_t ctxidbuf; |
Harald Welte | 0f0ea81 | 2015-09-11 18:58:28 +0200 | [diff] [blame] | 99 | struct msgb *msg; |
| 100 | int rc; |
| 101 | |
| 102 | memset(&ies, 0, sizeof(ies)); |
Harald Welte | cd5e981 | 2015-12-23 22:14:16 +0100 | [diff] [blame] | 103 | if (is_ps) |
| 104 | ies.cN_DomainIndicator = RUA_CN_DomainIndicator_ps_domain; |
| 105 | else |
| 106 | ies.cN_DomainIndicator = RUA_CN_DomainIndicator_cs_domain; |
| 107 | asn1_u24_to_bitstring(&ies.context_ID, &ctxidbuf, context_id); |
| 108 | ies.ranaP_Message.buf = (uint8_t *) data; |
| 109 | ies.ranaP_Message.size = len; |
Harald Welte | 0f0ea81 | 2015-09-11 18:58:28 +0200 | [diff] [blame] | 110 | |
| 111 | /* FIXME: msgb_free(msg)? ownership not yet clear */ |
| 112 | |
| 113 | memset(&out, 0, sizeof(out)); |
| 114 | rc = rua_encode_directtransferies(&out, &ies); |
| 115 | if (rc < 0) |
| 116 | return rc; |
| 117 | |
| 118 | msg = rua_generate_initiating_message(RUA_ProcedureCode_id_DirectTransfer, |
| 119 | RUA_Criticality_reject, |
| 120 | &asn_DEF_RUA_DirectTransfer, |
| 121 | &out); |
Harald Welte | cd5e981 | 2015-12-23 22:14:16 +0100 | [diff] [blame] | 122 | ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_RUA_DirectTransfer, &out); |
Harald Welte | 0f0ea81 | 2015-09-11 18:58:28 +0200 | [diff] [blame] | 123 | |
Harald Welte | 5bea800 | 2015-12-26 23:40:31 +0100 | [diff] [blame] | 124 | DEBUGP(DRUA, "transmitting RUA (cn=%s) payload of %u bytes\n", |
| 125 | is_ps ? "ps" : "cs", msgb_length(msg)); |
Harald Welte | 0f0ea81 | 2015-09-11 18:58:28 +0200 | [diff] [blame] | 126 | |
Harald Welte | cd5e981 | 2015-12-23 22:14:16 +0100 | [diff] [blame] | 127 | return hnbgw_rua_tx(hnb, msg); |
Harald Welte | 0f0ea81 | 2015-09-11 18:58:28 +0200 | [diff] [blame] | 128 | } |
| 129 | |
Harald Welte | cd5e981 | 2015-12-23 22:14:16 +0100 | [diff] [blame] | 130 | int rua_tx_disc(struct hnb_context *hnb, int is_ps, uint32_t context_id, |
| 131 | const RUA_Cause_t *cause, const uint8_t *data, unsigned int len) |
| 132 | { |
| 133 | RUA_Disconnect_t out; |
| 134 | RUA_DisconnectIEs_t ies; |
| 135 | struct msgb *msg; |
| 136 | uint32_t ctxidbuf; |
| 137 | int rc; |
| 138 | |
| 139 | memset(&ies, 0, sizeof(ies)); |
| 140 | if (is_ps) |
| 141 | ies.cN_DomainIndicator = RUA_CN_DomainIndicator_ps_domain; |
| 142 | else |
| 143 | ies.cN_DomainIndicator = RUA_CN_DomainIndicator_cs_domain; |
| 144 | asn1_u24_to_bitstring(&ies.context_ID, &ctxidbuf, context_id); |
| 145 | memcpy(&ies.cause, cause, sizeof(ies.cause)); |
| 146 | if (data && len) { |
| 147 | ies.presenceMask |= DISCONNECTIES_RUA_RANAP_MESSAGE_PRESENT; |
| 148 | ies.ranaP_Message.buf = (uint8_t *) data; |
| 149 | ies.ranaP_Message.size = len; |
| 150 | } |
| 151 | |
| 152 | /* FIXME: msgb_free(msg)? ownership not yet clear */ |
| 153 | |
| 154 | memset(&out, 0, sizeof(out)); |
| 155 | rc = rua_encode_disconnecties(&out, &ies); |
| 156 | if (rc < 0) |
| 157 | return rc; |
| 158 | |
| 159 | msg = rua_generate_initiating_message(RUA_ProcedureCode_id_Disconnect, |
| 160 | RUA_Criticality_reject, |
| 161 | &asn_DEF_RUA_Disconnect, |
| 162 | &out); |
| 163 | ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_RUA_Disconnect, &out); |
| 164 | |
Harald Welte | 5bea800 | 2015-12-26 23:40:31 +0100 | [diff] [blame] | 165 | DEBUGP(DRUA, "transmitting RUA (cn=%s) payload of %u bytes\n", |
| 166 | is_ps ? "ps" : "cs", msgb_length(msg)); |
| 167 | |
Harald Welte | cd5e981 | 2015-12-23 22:14:16 +0100 | [diff] [blame] | 168 | |
| 169 | return hnbgw_rua_tx(hnb, msg); |
| 170 | } |
| 171 | |
| 172 | |
Harald Welte | 0f0ea81 | 2015-09-11 18:58:28 +0200 | [diff] [blame] | 173 | |
Neels Hofmeyr | 12ed975 | 2017-07-03 16:33:14 +0200 | [diff] [blame] | 174 | /* forward a RUA message to the SCCP User API to SCCP */ |
| 175 | static int rua_to_scu(struct hnb_context *hnb, |
| 176 | CN_DomainIndicator_t cN_DomainIndicator, |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 177 | enum osmo_scu_prim_type type, |
| 178 | uint32_t context_id, uint32_t cause, |
| 179 | const uint8_t *data, unsigned int len) |
| 180 | { |
Neels Hofmeyr | 12ed975 | 2017-07-03 16:33:14 +0200 | [diff] [blame] | 181 | struct msgb *msg; |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 182 | struct osmo_scu_prim *prim; |
| 183 | struct hnbgw_context_map *map; |
Neels Hofmeyr | 0f88c11 | 2017-07-03 16:49:43 +0200 | [diff] [blame] | 184 | struct hnbgw_cnlink *cn = hnb->gw->sccp.cnlink; |
| 185 | struct osmo_sccp_addr *remote_addr; |
| 186 | bool is_ps; |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 187 | int rc; |
| 188 | |
Neels Hofmeyr | 12ed975 | 2017-07-03 16:33:14 +0200 | [diff] [blame] | 189 | switch (cN_DomainIndicator) { |
| 190 | case RUA_CN_DomainIndicator_cs_domain: |
Neels Hofmeyr | 0f88c11 | 2017-07-03 16:49:43 +0200 | [diff] [blame] | 191 | remote_addr = &hnb->gw->sccp.remote_addr_cs; |
| 192 | is_ps = false; |
Neels Hofmeyr | 12ed975 | 2017-07-03 16:33:14 +0200 | [diff] [blame] | 193 | break; |
| 194 | case RUA_CN_DomainIndicator_ps_domain: |
Neels Hofmeyr | 0f88c11 | 2017-07-03 16:49:43 +0200 | [diff] [blame] | 195 | remote_addr = &hnb->gw->sccp.remote_addr_ps; |
| 196 | is_ps = true; |
Neels Hofmeyr | 12ed975 | 2017-07-03 16:33:14 +0200 | [diff] [blame] | 197 | break; |
| 198 | default: |
| 199 | LOGP(DRUA, LOGL_ERROR, "Unsupported Domain %u\n", |
| 200 | cN_DomainIndicator); |
| 201 | return -1; |
| 202 | } |
| 203 | |
Harald Welte | 4928797 | 2015-12-29 19:00:35 +0100 | [diff] [blame] | 204 | if (!cn) { |
| 205 | DEBUGP(DRUA, "CN=NULL, discarding message\n"); |
| 206 | return 0; |
| 207 | } |
| 208 | |
Neels Hofmeyr | 0f88c11 | 2017-07-03 16:49:43 +0200 | [diff] [blame] | 209 | msg = msgb_alloc(1500, "rua_to_sccp"); |
| 210 | |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 211 | prim = (struct osmo_scu_prim *) msgb_put(msg, sizeof(*prim)); |
| 212 | osmo_prim_init(&prim->oph, SCCP_SAP_USER, type, PRIM_OP_REQUEST, msg); |
| 213 | |
Neels Hofmeyr | 0f88c11 | 2017-07-03 16:49:43 +0200 | [diff] [blame] | 214 | map = context_map_alloc_by_hnb(hnb, context_id, is_ps, cn); |
| 215 | OSMO_ASSERT(map); |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 216 | |
Neels Hofmeyr | c361431 | 2017-07-03 14:34:38 +0200 | [diff] [blame] | 217 | DEBUGP(DRUA, "rua_to_scu() %s to %s, rua_ctx_id %u scu_conn_id %u\n", |
| 218 | cn_domain_indicator_to_str(cN_DomainIndicator), |
| 219 | osmo_sccp_addr_dump(remote_addr), |
| 220 | map->rua_ctx_id, map->scu_conn_id); |
| 221 | |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 222 | /* add primitive header */ |
| 223 | switch (type) { |
| 224 | case OSMO_SCU_PRIM_N_CONNECT: |
Neels Hofmeyr | 0f88c11 | 2017-07-03 16:49:43 +0200 | [diff] [blame] | 225 | prim->u.connect.called_addr = *remote_addr; |
| 226 | prim->u.connect.calling_addr = cn->gw->sccp.local_addr; |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 227 | prim->u.connect.sccp_class = 2; |
| 228 | prim->u.connect.conn_id = map->scu_conn_id; |
Neels Hofmeyr | 54e6e1f | 2017-07-03 17:29:28 +0200 | [diff] [blame] | 229 | /* Two separate logs because of osmo_sccp_addr_dump(). */ |
| 230 | DEBUGP(DRUA, "RUA to SCCP N_CONNECT: called_addr:%s\n", |
| 231 | osmo_sccp_addr_dump(&prim->u.connect.called_addr)); |
| 232 | DEBUGP(DRUA, "RUA to SCCP N_CONNECT: calling_addr:%s\n", |
| 233 | osmo_sccp_addr_dump(&prim->u.connect.calling_addr)); |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 234 | break; |
| 235 | case OSMO_SCU_PRIM_N_DATA: |
| 236 | prim->u.data.conn_id = map->scu_conn_id; |
| 237 | break; |
| 238 | case OSMO_SCU_PRIM_N_DISCONNECT: |
| 239 | prim->u.disconnect.conn_id = map->scu_conn_id; |
| 240 | prim->u.disconnect.cause = cause; |
| 241 | break; |
| 242 | case OSMO_SCU_PRIM_N_UNITDATA: |
Neels Hofmeyr | 0f88c11 | 2017-07-03 16:49:43 +0200 | [diff] [blame] | 243 | prim->u.unitdata.called_addr = *remote_addr; |
| 244 | prim->u.unitdata.calling_addr = cn->gw->sccp.local_addr; |
Neels Hofmeyr | 54e6e1f | 2017-07-03 17:29:28 +0200 | [diff] [blame] | 245 | /* Two separate logs because of osmo_sccp_addr_dump(). */ |
| 246 | DEBUGP(DRUA, "RUA to SCCP N_UNITDATA: called_addr:%s\n", |
| 247 | osmo_sccp_addr_dump(&prim->u.unitdata.called_addr)); |
| 248 | DEBUGP(DRUA, "RUA to SCCP N_UNITDATA: calling_addr:%s\n", |
| 249 | osmo_sccp_addr_dump(&prim->u.unitdata.calling_addr)); |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 250 | break; |
| 251 | default: |
| 252 | return -EINVAL; |
| 253 | } |
| 254 | |
| 255 | /* add optional data section, if needed */ |
| 256 | if (data && len) { |
| 257 | msg->l2h = msgb_put(msg, len); |
| 258 | memcpy(msg->l2h, data, len); |
| 259 | } |
| 260 | |
Neels Hofmeyr | 0f88c11 | 2017-07-03 16:49:43 +0200 | [diff] [blame] | 261 | rc = osmo_sccp_user_sap_down(cn->sccp_user, &prim->oph); |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 262 | |
| 263 | return rc; |
| 264 | } |
| 265 | |
| 266 | static uint32_t rua_to_scu_cause(RUA_Cause_t *in) |
| 267 | { |
| 268 | /* FIXME: Implement this! */ |
| 269 | #if 0 |
| 270 | switch (in->present) { |
| 271 | case RUA_Cause_PR_NOTHING: |
| 272 | break; |
| 273 | case RUA_Cause_PR_radioNetwork: |
| 274 | switch (in->choice.radioNetwork) { |
| 275 | case RUA_CauseRadioNetwork_normal: |
| 276 | case RUA_CauseRadioNetwork_connect_failed: |
| 277 | case RUA_CauseRadioNetwork_network_release: |
| 278 | case RUA_CauseRadioNetwork_unspecified: |
| 279 | } |
| 280 | break; |
| 281 | case RUA_Cause_PR_transport: |
| 282 | switch (in->choice.transport) { |
| 283 | case RUA_CauseTransport_transport_resource_unavailable: |
| 284 | break; |
| 285 | case RUA_CauseTransport_unspecified: |
| 286 | break; |
| 287 | } |
| 288 | break; |
| 289 | case RUA_Cause_PR_protocol: |
| 290 | switch (in->choice.protocol) { |
| 291 | case RUA_CauseProtocol_transfer_syntax_error: |
| 292 | break; |
| 293 | case RUA_CauseProtocol_abstract_syntax_error_reject: |
| 294 | break; |
| 295 | case RUA_CauseProtocol_abstract_syntax_error_ignore_and_notify: |
| 296 | break; |
| 297 | case RUA_CauseProtocol_message_not_compatible_with_receiver_state: |
| 298 | break; |
| 299 | case RUA_CauseProtocol_semantic_error: |
| 300 | break; |
| 301 | case RUA_CauseProtocol_unspecified: |
| 302 | break; |
| 303 | case RUA_CauseProtocol_abstract_syntax_error_falsely_constructed_message: |
| 304 | break; |
| 305 | } |
| 306 | break; |
| 307 | case RUA_Cause_PR_misc: |
| 308 | switch (in->choice.misc) { |
| 309 | case RUA_CauseMisc_processing_overload: |
| 310 | break; |
| 311 | case RUA_CauseMisc_hardware_failure: |
| 312 | break; |
| 313 | case RUA_CauseMisc_o_and_m_intervention: |
| 314 | break; |
| 315 | case RUA_CauseMisc_unspecified: |
| 316 | break; |
| 317 | } |
| 318 | break; |
| 319 | default: |
| 320 | break; |
| 321 | } |
| 322 | #else |
| 323 | return 0; |
| 324 | #endif |
| 325 | |
| 326 | } |
| 327 | |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 328 | static int rua_rx_init_connect(struct msgb *msg, ANY_t *in) |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 329 | { |
| 330 | RUA_ConnectIEs_t ies; |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 331 | struct hnb_context *hnb = msg->dst; |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 332 | uint32_t context_id; |
| 333 | int rc; |
| 334 | |
| 335 | rc = rua_decode_connecties(&ies, in); |
| 336 | if (rc < 0) |
| 337 | return rc; |
| 338 | |
Harald Welte | b0de906 | 2015-12-24 14:10:17 +0100 | [diff] [blame] | 339 | context_id = asn1bitstr_to_u24(&ies.context_ID); |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 340 | |
Neels Hofmeyr | c361431 | 2017-07-03 14:34:38 +0200 | [diff] [blame] | 341 | DEBUGP(DRUA, "RUA %s Connect.req(ctx=0x%x, %s)\n", |
| 342 | cn_domain_indicator_to_str(ies.cN_DomainIndicator), |
| 343 | context_id, |
| 344 | ies.establishment_Cause == RUA_Establishment_Cause_emergency_call |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 345 | ? "emergency" : "normal"); |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 346 | |
Neels Hofmeyr | 12ed975 | 2017-07-03 16:33:14 +0200 | [diff] [blame] | 347 | rc = rua_to_scu(hnb, ies.cN_DomainIndicator, OSMO_SCU_PRIM_N_CONNECT, |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 348 | context_id, 0, ies.ranaP_Message.buf, |
| 349 | ies.ranaP_Message.size); |
| 350 | /* FIXME: what to do with the asn1c-allocated memory */ |
Daniel Willmann | 11e912a | 2016-01-07 13:19:30 +0100 | [diff] [blame] | 351 | rua_free_connecties(&ies); |
Harald Welte | 0f0ea81 | 2015-09-11 18:58:28 +0200 | [diff] [blame] | 352 | |
| 353 | return rc; |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 354 | } |
| 355 | |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 356 | static int rua_rx_init_disconnect(struct msgb *msg, ANY_t *in) |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 357 | { |
| 358 | RUA_DisconnectIEs_t ies; |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 359 | struct hnb_context *hnb = msg->dst; |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 360 | uint32_t context_id; |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 361 | uint32_t scu_cause; |
| 362 | uint8_t *ranap_data = NULL; |
| 363 | unsigned int ranap_len = 0; |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 364 | int rc; |
| 365 | |
| 366 | rc = rua_decode_disconnecties(&ies, in); |
| 367 | if (rc < 0) |
| 368 | return rc; |
| 369 | |
Harald Welte | b0de906 | 2015-12-24 14:10:17 +0100 | [diff] [blame] | 370 | context_id = asn1bitstr_to_u24(&ies.context_ID); |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 371 | scu_cause = rua_to_scu_cause(&ies.cause); |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 372 | |
Harald Welte | 37166a2 | 2015-12-24 10:12:09 +0100 | [diff] [blame] | 373 | DEBUGP(DRUA, "RUA Disconnect.req(ctx=0x%x,cause=%s)\n", context_id, |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 374 | rua_cause_str(&ies.cause)); |
Harald Welte | 0f0ea81 | 2015-09-11 18:58:28 +0200 | [diff] [blame] | 375 | |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 376 | if (ies.presenceMask & DISCONNECTIES_RUA_RANAP_MESSAGE_PRESENT) { |
| 377 | ranap_data = ies.ranaP_Message.buf; |
| 378 | ranap_len = ies.ranaP_Message.size; |
| 379 | } |
| 380 | |
Neels Hofmeyr | 12ed975 | 2017-07-03 16:33:14 +0200 | [diff] [blame] | 381 | rc = rua_to_scu(hnb, ies.cN_DomainIndicator, |
| 382 | OSMO_SCU_PRIM_N_DISCONNECT, |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 383 | context_id, scu_cause, ranap_data, ranap_len); |
Neels Hofmeyr | fe87809 | 2016-11-25 13:13:31 +0100 | [diff] [blame] | 384 | |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 385 | /* FIXME: what to do with the asn1c-allocated memory */ |
Daniel Willmann | 11e912a | 2016-01-07 13:19:30 +0100 | [diff] [blame] | 386 | rua_free_disconnecties(&ies); |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 387 | |
Harald Welte | 0f0ea81 | 2015-09-11 18:58:28 +0200 | [diff] [blame] | 388 | return rc; |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 389 | } |
| 390 | |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 391 | static int rua_rx_init_dt(struct msgb *msg, ANY_t *in) |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 392 | { |
| 393 | RUA_DirectTransferIEs_t ies; |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 394 | struct hnb_context *hnb = msg->dst; |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 395 | uint32_t context_id; |
| 396 | int rc; |
| 397 | |
| 398 | rc = rua_decode_directtransferies(&ies, in); |
| 399 | if (rc < 0) |
| 400 | return rc; |
| 401 | |
Harald Welte | b0de906 | 2015-12-24 14:10:17 +0100 | [diff] [blame] | 402 | context_id = asn1bitstr_to_u24(&ies.context_ID); |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 403 | |
Harald Welte | 37166a2 | 2015-12-24 10:12:09 +0100 | [diff] [blame] | 404 | DEBUGP(DRUA, "RUA Data.req(ctx=0x%x)\n", context_id); |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 405 | |
Neels Hofmeyr | 12ed975 | 2017-07-03 16:33:14 +0200 | [diff] [blame] | 406 | rc = rua_to_scu(hnb, |
| 407 | ies.cN_DomainIndicator, |
| 408 | OSMO_SCU_PRIM_N_DATA, |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 409 | context_id, 0, ies.ranaP_Message.buf, |
| 410 | ies.ranaP_Message.size); |
Neels Hofmeyr | fe87809 | 2016-11-25 13:13:31 +0100 | [diff] [blame] | 411 | |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 412 | /* FIXME: what to do with the asn1c-allocated memory */ |
Daniel Willmann | 11e912a | 2016-01-07 13:19:30 +0100 | [diff] [blame] | 413 | rua_free_directtransferies(&ies); |
Harald Welte | 0f0ea81 | 2015-09-11 18:58:28 +0200 | [diff] [blame] | 414 | |
| 415 | return rc; |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 416 | } |
| 417 | |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 418 | static int rua_rx_init_udt(struct msgb *msg, ANY_t *in) |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 419 | { |
| 420 | RUA_ConnectionlessTransferIEs_t ies; |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 421 | RUA_CN_DomainIndicator_t domain; |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 422 | int rc; |
| 423 | |
| 424 | rc = rua_decode_connectionlesstransferies(&ies, in); |
| 425 | if (rc < 0) |
| 426 | return rc; |
| 427 | |
Harald Welte | 37166a2 | 2015-12-24 10:12:09 +0100 | [diff] [blame] | 428 | DEBUGP(DRUA, "RUA UData.req()\n"); |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 429 | |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 430 | /* according tot the spec, we can primarily receive Overload, |
| 431 | * Reset, Reset ACK, Error Indication, reset Resource, Reset |
| 432 | * Resurce Acknowledge as connecitonless RANAP. There are some |
| 433 | * more messages regarding Information Transfer, Direct |
| 434 | * Information Transfer and Uplink Information Trnansfer that we |
| 435 | * can ignore. In either case, it is RANAP that we need to |
| 436 | * decode... */ |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 437 | rc = hnbgw_ranap_rx(msg, ies.ranaP_Message.buf, ies.ranaP_Message.size); |
Daniel Willmann | 11e912a | 2016-01-07 13:19:30 +0100 | [diff] [blame] | 438 | rua_free_connectionlesstransferies(&ies); |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 439 | |
| 440 | return rc; |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 441 | } |
| 442 | |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 443 | |
| 444 | static int rua_rx_init_err_ind(struct msgb *msg, ANY_t *in) |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 445 | { |
| 446 | RUA_ErrorIndicationIEs_t ies; |
| 447 | int rc; |
| 448 | |
| 449 | rc = rua_decode_errorindicationies(&ies, in); |
| 450 | if (rc < 0) |
| 451 | return rc; |
| 452 | |
Harald Welte | 831e1ee | 2015-12-25 10:28:55 +0100 | [diff] [blame] | 453 | LOGP(DRUA, LOGL_ERROR, "RUA UData.ErrorInd(%s)\n", |
| 454 | rua_cause_str(&ies.cause)); |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 455 | |
Daniel Willmann | 11e912a | 2016-01-07 13:19:30 +0100 | [diff] [blame] | 456 | rua_free_errorindicationies(&ies); |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 457 | return rc; |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 458 | } |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 459 | |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 460 | static int rua_rx_initiating_msg(struct msgb *msg, RUA_InitiatingMessage_t *imsg) |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 461 | { |
| 462 | int rc; |
| 463 | |
| 464 | switch (imsg->procedureCode) { |
| 465 | case RUA_ProcedureCode_id_Connect: |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 466 | rc = rua_rx_init_connect(msg, &imsg->value); |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 467 | break; |
| 468 | case RUA_ProcedureCode_id_DirectTransfer: |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 469 | rc = rua_rx_init_dt(msg, &imsg->value); |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 470 | break; |
| 471 | case RUA_ProcedureCode_id_Disconnect: |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 472 | rc = rua_rx_init_disconnect(msg, &imsg->value); |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 473 | break; |
| 474 | case RUA_ProcedureCode_id_ConnectionlessTransfer: |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 475 | rc = rua_rx_init_udt(msg, &imsg->value); |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 476 | break; |
| 477 | case RUA_ProcedureCode_id_ErrorIndication: |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 478 | rc = rua_rx_init_err_ind(msg, &imsg->value); |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 479 | break; |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 480 | case RUA_ProcedureCode_id_privateMessage: |
Neels Hofmeyr | 2b5021f | 2016-11-25 13:25:38 +0100 | [diff] [blame] | 481 | LOGP(DRUA, LOGL_NOTICE, |
| 482 | "Unhandled: RUA Initiating Msg: Private Msg\n"); |
| 483 | rc = 0; |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 484 | break; |
| 485 | default: |
Harald Welte | 37166a2 | 2015-12-24 10:12:09 +0100 | [diff] [blame] | 486 | LOGP(DRUA, LOGL_NOTICE, "Unknown RUA Procedure %u\n", |
| 487 | imsg->procedureCode); |
| 488 | rc = -1; |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 489 | } |
Harald Welte | 37166a2 | 2015-12-24 10:12:09 +0100 | [diff] [blame] | 490 | |
| 491 | return rc; |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 492 | } |
| 493 | |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 494 | static int rua_rx_successful_outcome_msg(struct msgb *msg, RUA_SuccessfulOutcome_t *in) |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 495 | { |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 496 | /* FIXME */ |
Harald Welte | 37166a2 | 2015-12-24 10:12:09 +0100 | [diff] [blame] | 497 | LOGP(DRUA, LOGL_NOTICE, "Unexpected RUA Sucessful Outcome\n"); |
| 498 | return -1; |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 499 | } |
| 500 | |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 501 | static int rua_rx_unsuccessful_outcome_msg(struct msgb *msg, RUA_UnsuccessfulOutcome_t *in) |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 502 | { |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 503 | /* FIXME */ |
Harald Welte | 37166a2 | 2015-12-24 10:12:09 +0100 | [diff] [blame] | 504 | LOGP(DRUA, LOGL_NOTICE, "Unexpected RUA Unsucessful Outcome\n"); |
| 505 | return -1; |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 506 | } |
| 507 | |
| 508 | |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 509 | static int _hnbgw_rua_rx(struct msgb *msg, RUA_RUA_PDU_t *pdu) |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 510 | { |
| 511 | int rc; |
| 512 | |
| 513 | /* it's a bit odd that we can't dispatch on procedure code, but |
| 514 | * that's not possible */ |
| 515 | switch (pdu->present) { |
| 516 | case RUA_RUA_PDU_PR_initiatingMessage: |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 517 | rc = rua_rx_initiating_msg(msg, &pdu->choice.initiatingMessage); |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 518 | break; |
| 519 | case RUA_RUA_PDU_PR_successfulOutcome: |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 520 | rc = rua_rx_successful_outcome_msg(msg, &pdu->choice.successfulOutcome); |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 521 | break; |
| 522 | case RUA_RUA_PDU_PR_unsuccessfulOutcome: |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 523 | rc = rua_rx_unsuccessful_outcome_msg(msg, &pdu->choice.unsuccessfulOutcome); |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 524 | break; |
| 525 | default: |
Harald Welte | 37166a2 | 2015-12-24 10:12:09 +0100 | [diff] [blame] | 526 | LOGP(DRUA, LOGL_NOTICE, "Unknown RUA presence %u\n", pdu->present); |
| 527 | rc = -1; |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 528 | } |
Harald Welte | 37166a2 | 2015-12-24 10:12:09 +0100 | [diff] [blame] | 529 | |
| 530 | return rc; |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 531 | } |
| 532 | |
| 533 | int hnbgw_rua_rx(struct hnb_context *hnb, struct msgb *msg) |
| 534 | { |
| 535 | RUA_RUA_PDU_t _pdu, *pdu = &_pdu; |
| 536 | asn_dec_rval_t dec_ret; |
| 537 | int rc; |
| 538 | |
| 539 | /* decode and handle to _hnbgw_hnbap_rx() */ |
| 540 | |
| 541 | memset(pdu, 0, sizeof(*pdu)); |
| 542 | dec_ret = aper_decode(NULL, &asn_DEF_RUA_RUA_PDU, (void **) &pdu, |
| 543 | msg->data, msgb_length(msg), 0, 0); |
| 544 | if (dec_ret.code != RC_OK) { |
Harald Welte | f42317b | 2015-12-23 15:36:31 +0100 | [diff] [blame] | 545 | LOGP(DRUA, LOGL_ERROR, "Error in ASN.1 decode\n"); |
Neels Hofmeyr | a6a68e6 | 2016-11-25 13:21:02 +0100 | [diff] [blame] | 546 | return -1; |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 547 | } |
| 548 | |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 549 | rc = _hnbgw_rua_rx(msg, pdu); |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 550 | |
| 551 | return rc; |
| 552 | } |
| 553 | |
| 554 | |
| 555 | int hnbgw_rua_init(void) |
| 556 | { |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 557 | return 0; |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 558 | } |