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 | da86fe5 | 2017-11-21 08:14:37 +0100 | [diff] [blame] | 27 | #include <osmocom/sigtran/sccp_helpers.h> |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 28 | |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 29 | #include <unistd.h> |
| 30 | #include <errno.h> |
| 31 | #include <string.h> |
| 32 | |
| 33 | #include "asn1helpers.h" |
| 34 | |
Neels Hofmeyr | df63de2 | 2016-08-18 13:13:55 +0200 | [diff] [blame] | 35 | #include <osmocom/iuh/hnbgw.h> |
| 36 | #include <osmocom/iuh/hnbgw_ranap.h> |
Neels Hofmeyr | 8345792 | 2016-08-26 23:56:44 +0200 | [diff] [blame] | 37 | #include <osmocom/rua/rua_common.h> |
| 38 | #include <osmocom/rua/rua_ies_defs.h> |
Neels Hofmeyr | df63de2 | 2016-08-18 13:13:55 +0200 | [diff] [blame] | 39 | #include <osmocom/iuh/context_map.h> |
Neels Hofmeyr | 12ed975 | 2017-07-03 16:33:14 +0200 | [diff] [blame] | 40 | #include <osmocom/hnbap/CN-DomainIndicator.h> |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 41 | |
Neels Hofmeyr | c361431 | 2017-07-03 14:34:38 +0200 | [diff] [blame] | 42 | static const char *cn_domain_indicator_to_str(CN_DomainIndicator_t cN_DomainIndicator) |
| 43 | { |
| 44 | switch (cN_DomainIndicator) { |
| 45 | case RUA_CN_DomainIndicator_cs_domain: |
| 46 | return "IuCS"; |
| 47 | case RUA_CN_DomainIndicator_ps_domain: |
| 48 | return "IuPS"; |
| 49 | default: |
| 50 | return "(unknown-domain)"; |
| 51 | } |
| 52 | } |
| 53 | |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 54 | static int hnbgw_rua_tx(struct hnb_context *ctx, struct msgb *msg) |
| 55 | { |
| 56 | if (!msg) |
| 57 | return -EINVAL; |
| 58 | |
Harald Welte | ffa7c0a | 2015-12-23 00:03:41 +0100 | [diff] [blame] | 59 | msgb_sctp_ppid(msg) = IUH_PPI_RUA; |
Daniel Willmann | 6480cad | 2016-01-06 18:06:26 +0100 | [diff] [blame] | 60 | osmo_stream_srv_send(ctx->conn, msg); |
| 61 | |
| 62 | return 0; |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 63 | } |
| 64 | |
Harald Welte | cd5e981 | 2015-12-23 22:14:16 +0100 | [diff] [blame] | 65 | 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] | 66 | { |
Harald Welte | e2e5d4d | 2015-09-10 23:49:45 +0200 | [diff] [blame] | 67 | RUA_ConnectionlessTransfer_t out; |
| 68 | RUA_ConnectionlessTransferIEs_t ies; |
| 69 | struct msgb *msg; |
| 70 | int rc; |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 71 | |
Harald Welte | e2e5d4d | 2015-09-10 23:49:45 +0200 | [diff] [blame] | 72 | memset(&ies, 0, sizeof(ies)); |
Harald Welte | cd5e981 | 2015-12-23 22:14:16 +0100 | [diff] [blame] | 73 | ies.ranaP_Message.buf = (uint8_t *) data; |
| 74 | ies.ranaP_Message.size = len; |
Harald Welte | e2e5d4d | 2015-09-10 23:49:45 +0200 | [diff] [blame] | 75 | |
| 76 | /* FIXME: msgb_free(msg)? ownership not yet clear */ |
| 77 | |
| 78 | memset(&out, 0, sizeof(out)); |
| 79 | rc = rua_encode_connectionlesstransferies(&out, &ies); |
| 80 | if (rc < 0) |
| 81 | return rc; |
| 82 | |
| 83 | msg = rua_generate_initiating_message(RUA_ProcedureCode_id_ConnectionlessTransfer, |
| 84 | RUA_Criticality_reject, |
| 85 | &asn_DEF_RUA_ConnectionlessTransfer, |
| 86 | &out); |
Harald Welte | cd5e981 | 2015-12-23 22:14:16 +0100 | [diff] [blame] | 87 | ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_RUA_ConnectionlessTransfer, &out); |
Harald Welte | e2e5d4d | 2015-09-10 23:49:45 +0200 | [diff] [blame] | 88 | |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 89 | DEBUGP(DRUA, "transmitting RUA payload of %u bytes\n", msgb_length(msg)); |
Harald Welte | e2e5d4d | 2015-09-10 23:49:45 +0200 | [diff] [blame] | 90 | |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 91 | return hnbgw_rua_tx(hnb, msg); |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 92 | } |
| 93 | |
Harald Welte | cd5e981 | 2015-12-23 22:14:16 +0100 | [diff] [blame] | 94 | int rua_tx_dt(struct hnb_context *hnb, int is_ps, uint32_t context_id, |
| 95 | const uint8_t *data, unsigned int len) |
Harald Welte | 0f0ea81 | 2015-09-11 18:58:28 +0200 | [diff] [blame] | 96 | { |
| 97 | RUA_DirectTransfer_t out; |
| 98 | RUA_DirectTransferIEs_t ies; |
Harald Welte | cd5e981 | 2015-12-23 22:14:16 +0100 | [diff] [blame] | 99 | uint32_t ctxidbuf; |
Harald Welte | 0f0ea81 | 2015-09-11 18:58:28 +0200 | [diff] [blame] | 100 | struct msgb *msg; |
| 101 | int rc; |
| 102 | |
| 103 | memset(&ies, 0, sizeof(ies)); |
Harald Welte | cd5e981 | 2015-12-23 22:14:16 +0100 | [diff] [blame] | 104 | if (is_ps) |
| 105 | ies.cN_DomainIndicator = RUA_CN_DomainIndicator_ps_domain; |
| 106 | else |
| 107 | ies.cN_DomainIndicator = RUA_CN_DomainIndicator_cs_domain; |
| 108 | asn1_u24_to_bitstring(&ies.context_ID, &ctxidbuf, context_id); |
| 109 | ies.ranaP_Message.buf = (uint8_t *) data; |
| 110 | ies.ranaP_Message.size = len; |
Harald Welte | 0f0ea81 | 2015-09-11 18:58:28 +0200 | [diff] [blame] | 111 | |
| 112 | /* FIXME: msgb_free(msg)? ownership not yet clear */ |
| 113 | |
| 114 | memset(&out, 0, sizeof(out)); |
| 115 | rc = rua_encode_directtransferies(&out, &ies); |
| 116 | if (rc < 0) |
| 117 | return rc; |
| 118 | |
| 119 | msg = rua_generate_initiating_message(RUA_ProcedureCode_id_DirectTransfer, |
| 120 | RUA_Criticality_reject, |
| 121 | &asn_DEF_RUA_DirectTransfer, |
| 122 | &out); |
Harald Welte | cd5e981 | 2015-12-23 22:14:16 +0100 | [diff] [blame] | 123 | ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_RUA_DirectTransfer, &out); |
Harald Welte | 0f0ea81 | 2015-09-11 18:58:28 +0200 | [diff] [blame] | 124 | |
Harald Welte | 5bea800 | 2015-12-26 23:40:31 +0100 | [diff] [blame] | 125 | DEBUGP(DRUA, "transmitting RUA (cn=%s) payload of %u bytes\n", |
| 126 | is_ps ? "ps" : "cs", msgb_length(msg)); |
Harald Welte | 0f0ea81 | 2015-09-11 18:58:28 +0200 | [diff] [blame] | 127 | |
Harald Welte | cd5e981 | 2015-12-23 22:14:16 +0100 | [diff] [blame] | 128 | return hnbgw_rua_tx(hnb, msg); |
Harald Welte | 0f0ea81 | 2015-09-11 18:58:28 +0200 | [diff] [blame] | 129 | } |
| 130 | |
Harald Welte | cd5e981 | 2015-12-23 22:14:16 +0100 | [diff] [blame] | 131 | int rua_tx_disc(struct hnb_context *hnb, int is_ps, uint32_t context_id, |
| 132 | const RUA_Cause_t *cause, const uint8_t *data, unsigned int len) |
| 133 | { |
| 134 | RUA_Disconnect_t out; |
| 135 | RUA_DisconnectIEs_t ies; |
| 136 | struct msgb *msg; |
| 137 | uint32_t ctxidbuf; |
| 138 | int rc; |
| 139 | |
| 140 | memset(&ies, 0, sizeof(ies)); |
| 141 | if (is_ps) |
| 142 | ies.cN_DomainIndicator = RUA_CN_DomainIndicator_ps_domain; |
| 143 | else |
| 144 | ies.cN_DomainIndicator = RUA_CN_DomainIndicator_cs_domain; |
| 145 | asn1_u24_to_bitstring(&ies.context_ID, &ctxidbuf, context_id); |
| 146 | memcpy(&ies.cause, cause, sizeof(ies.cause)); |
| 147 | if (data && len) { |
| 148 | ies.presenceMask |= DISCONNECTIES_RUA_RANAP_MESSAGE_PRESENT; |
| 149 | ies.ranaP_Message.buf = (uint8_t *) data; |
| 150 | ies.ranaP_Message.size = len; |
| 151 | } |
| 152 | |
| 153 | /* FIXME: msgb_free(msg)? ownership not yet clear */ |
| 154 | |
| 155 | memset(&out, 0, sizeof(out)); |
| 156 | rc = rua_encode_disconnecties(&out, &ies); |
| 157 | if (rc < 0) |
| 158 | return rc; |
| 159 | |
| 160 | msg = rua_generate_initiating_message(RUA_ProcedureCode_id_Disconnect, |
| 161 | RUA_Criticality_reject, |
| 162 | &asn_DEF_RUA_Disconnect, |
| 163 | &out); |
| 164 | ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_RUA_Disconnect, &out); |
| 165 | |
Harald Welte | 5bea800 | 2015-12-26 23:40:31 +0100 | [diff] [blame] | 166 | DEBUGP(DRUA, "transmitting RUA (cn=%s) payload of %u bytes\n", |
| 167 | is_ps ? "ps" : "cs", msgb_length(msg)); |
| 168 | |
Harald Welte | cd5e981 | 2015-12-23 22:14:16 +0100 | [diff] [blame] | 169 | |
| 170 | return hnbgw_rua_tx(hnb, msg); |
| 171 | } |
| 172 | |
| 173 | |
Harald Welte | 0f0ea81 | 2015-09-11 18:58:28 +0200 | [diff] [blame] | 174 | |
Neels Hofmeyr | 12ed975 | 2017-07-03 16:33:14 +0200 | [diff] [blame] | 175 | /* forward a RUA message to the SCCP User API to SCCP */ |
| 176 | static int rua_to_scu(struct hnb_context *hnb, |
| 177 | CN_DomainIndicator_t cN_DomainIndicator, |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 178 | enum osmo_scu_prim_type type, |
| 179 | uint32_t context_id, uint32_t cause, |
| 180 | const uint8_t *data, unsigned int len) |
| 181 | { |
Neels Hofmeyr | 12ed975 | 2017-07-03 16:33:14 +0200 | [diff] [blame] | 182 | struct msgb *msg; |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 183 | struct osmo_scu_prim *prim; |
Neels Hofmeyr | 6814d22 | 2018-01-15 23:19:43 +0100 | [diff] [blame] | 184 | struct hnbgw_context_map *map = NULL; |
Neels Hofmeyr | 0f88c11 | 2017-07-03 16:49:43 +0200 | [diff] [blame] | 185 | struct hnbgw_cnlink *cn = hnb->gw->sccp.cnlink; |
| 186 | struct osmo_sccp_addr *remote_addr; |
| 187 | bool is_ps; |
Neels Hofmeyr | b10e293 | 2017-12-24 21:49:44 +0100 | [diff] [blame] | 188 | bool release_context_map = false; |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 189 | int rc; |
| 190 | |
Neels Hofmeyr | 12ed975 | 2017-07-03 16:33:14 +0200 | [diff] [blame] | 191 | switch (cN_DomainIndicator) { |
| 192 | case RUA_CN_DomainIndicator_cs_domain: |
Neels Hofmeyr | ecbdc5c | 2017-07-31 13:13:24 +0200 | [diff] [blame] | 193 | remote_addr = &hnb->gw->sccp.iucs_remote_addr; |
Neels Hofmeyr | 0f88c11 | 2017-07-03 16:49:43 +0200 | [diff] [blame] | 194 | is_ps = false; |
Neels Hofmeyr | 12ed975 | 2017-07-03 16:33:14 +0200 | [diff] [blame] | 195 | break; |
| 196 | case RUA_CN_DomainIndicator_ps_domain: |
Neels Hofmeyr | ecbdc5c | 2017-07-31 13:13:24 +0200 | [diff] [blame] | 197 | remote_addr = &hnb->gw->sccp.iups_remote_addr; |
Neels Hofmeyr | 0f88c11 | 2017-07-03 16:49:43 +0200 | [diff] [blame] | 198 | is_ps = true; |
Neels Hofmeyr | 12ed975 | 2017-07-03 16:33:14 +0200 | [diff] [blame] | 199 | break; |
| 200 | default: |
Neels Hofmeyr | 70d3ece | 2018-01-15 23:19:04 +0100 | [diff] [blame] | 201 | LOGP(DRUA, LOGL_ERROR, "Unsupported Domain %ld\n", |
Neels Hofmeyr | 12ed975 | 2017-07-03 16:33:14 +0200 | [diff] [blame] | 202 | cN_DomainIndicator); |
| 203 | return -1; |
| 204 | } |
| 205 | |
Harald Welte | 4928797 | 2015-12-29 19:00:35 +0100 | [diff] [blame] | 206 | if (!cn) { |
| 207 | DEBUGP(DRUA, "CN=NULL, discarding message\n"); |
| 208 | return 0; |
| 209 | } |
| 210 | |
Neels Hofmeyr | 0f88c11 | 2017-07-03 16:49:43 +0200 | [diff] [blame] | 211 | msg = msgb_alloc(1500, "rua_to_sccp"); |
| 212 | |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 213 | prim = (struct osmo_scu_prim *) msgb_put(msg, sizeof(*prim)); |
| 214 | osmo_prim_init(&prim->oph, SCCP_SAP_USER, type, PRIM_OP_REQUEST, msg); |
| 215 | |
Neels Hofmeyr | 1e9f4f5 | 2017-12-24 23:57:58 +0100 | [diff] [blame] | 216 | switch (type) { |
| 217 | case OSMO_SCU_PRIM_N_UNITDATA: |
| 218 | DEBUGP(DRUA, "rua_to_scu() %s to %s, rua_ctx_id %u (unitdata, no scu_conn_id)\n", |
| 219 | cn_domain_indicator_to_str(cN_DomainIndicator), |
| 220 | osmo_sccp_addr_dump(remote_addr), |
Neels Hofmeyr | 6814d22 | 2018-01-15 23:19:43 +0100 | [diff] [blame] | 221 | context_id); |
Neels Hofmeyr | 1e9f4f5 | 2017-12-24 23:57:58 +0100 | [diff] [blame] | 222 | break; |
| 223 | default: |
| 224 | map = context_map_alloc_by_hnb(hnb, context_id, is_ps, cn); |
| 225 | OSMO_ASSERT(map); |
| 226 | DEBUGP(DRUA, "rua_to_scu() %s to %s, rua_ctx_id %u scu_conn_id %u\n", |
| 227 | cn_domain_indicator_to_str(cN_DomainIndicator), |
| 228 | osmo_sccp_addr_dump(remote_addr), |
| 229 | map->rua_ctx_id, map->scu_conn_id); |
| 230 | } |
Neels Hofmeyr | c361431 | 2017-07-03 14:34:38 +0200 | [diff] [blame] | 231 | |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 232 | /* add primitive header */ |
| 233 | switch (type) { |
| 234 | case OSMO_SCU_PRIM_N_CONNECT: |
Neels Hofmeyr | 0f88c11 | 2017-07-03 16:49:43 +0200 | [diff] [blame] | 235 | prim->u.connect.called_addr = *remote_addr; |
| 236 | prim->u.connect.calling_addr = cn->gw->sccp.local_addr; |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 237 | prim->u.connect.sccp_class = 2; |
| 238 | prim->u.connect.conn_id = map->scu_conn_id; |
Neels Hofmeyr | 54e6e1f | 2017-07-03 17:29:28 +0200 | [diff] [blame] | 239 | /* Two separate logs because of osmo_sccp_addr_dump(). */ |
| 240 | DEBUGP(DRUA, "RUA to SCCP N_CONNECT: called_addr:%s\n", |
| 241 | osmo_sccp_addr_dump(&prim->u.connect.called_addr)); |
| 242 | DEBUGP(DRUA, "RUA to SCCP N_CONNECT: calling_addr:%s\n", |
| 243 | osmo_sccp_addr_dump(&prim->u.connect.calling_addr)); |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 244 | break; |
| 245 | case OSMO_SCU_PRIM_N_DATA: |
| 246 | prim->u.data.conn_id = map->scu_conn_id; |
| 247 | break; |
| 248 | case OSMO_SCU_PRIM_N_DISCONNECT: |
| 249 | prim->u.disconnect.conn_id = map->scu_conn_id; |
| 250 | prim->u.disconnect.cause = cause; |
Neels Hofmeyr | b10e293 | 2017-12-24 21:49:44 +0100 | [diff] [blame] | 251 | release_context_map = true; |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 252 | break; |
| 253 | case OSMO_SCU_PRIM_N_UNITDATA: |
Neels Hofmeyr | 0f88c11 | 2017-07-03 16:49:43 +0200 | [diff] [blame] | 254 | prim->u.unitdata.called_addr = *remote_addr; |
| 255 | prim->u.unitdata.calling_addr = cn->gw->sccp.local_addr; |
Neels Hofmeyr | 54e6e1f | 2017-07-03 17:29:28 +0200 | [diff] [blame] | 256 | /* Two separate logs because of osmo_sccp_addr_dump(). */ |
| 257 | DEBUGP(DRUA, "RUA to SCCP N_UNITDATA: called_addr:%s\n", |
| 258 | osmo_sccp_addr_dump(&prim->u.unitdata.called_addr)); |
| 259 | DEBUGP(DRUA, "RUA to SCCP N_UNITDATA: calling_addr:%s\n", |
| 260 | osmo_sccp_addr_dump(&prim->u.unitdata.calling_addr)); |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 261 | break; |
| 262 | default: |
| 263 | return -EINVAL; |
| 264 | } |
| 265 | |
| 266 | /* add optional data section, if needed */ |
| 267 | if (data && len) { |
| 268 | msg->l2h = msgb_put(msg, len); |
| 269 | memcpy(msg->l2h, data, len); |
| 270 | } |
| 271 | |
Neels Hofmeyr | 0f88c11 | 2017-07-03 16:49:43 +0200 | [diff] [blame] | 272 | rc = osmo_sccp_user_sap_down(cn->sccp_user, &prim->oph); |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 273 | |
Neels Hofmeyr | 1e9f4f5 | 2017-12-24 23:57:58 +0100 | [diff] [blame] | 274 | if (map && release_context_map) |
Neels Hofmeyr | b10e293 | 2017-12-24 21:49:44 +0100 | [diff] [blame] | 275 | context_map_deactivate(map); |
| 276 | |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 277 | return rc; |
| 278 | } |
| 279 | |
| 280 | static uint32_t rua_to_scu_cause(RUA_Cause_t *in) |
| 281 | { |
| 282 | /* FIXME: Implement this! */ |
| 283 | #if 0 |
| 284 | switch (in->present) { |
| 285 | case RUA_Cause_PR_NOTHING: |
| 286 | break; |
| 287 | case RUA_Cause_PR_radioNetwork: |
| 288 | switch (in->choice.radioNetwork) { |
| 289 | case RUA_CauseRadioNetwork_normal: |
| 290 | case RUA_CauseRadioNetwork_connect_failed: |
| 291 | case RUA_CauseRadioNetwork_network_release: |
| 292 | case RUA_CauseRadioNetwork_unspecified: |
| 293 | } |
| 294 | break; |
| 295 | case RUA_Cause_PR_transport: |
| 296 | switch (in->choice.transport) { |
| 297 | case RUA_CauseTransport_transport_resource_unavailable: |
| 298 | break; |
| 299 | case RUA_CauseTransport_unspecified: |
| 300 | break; |
| 301 | } |
| 302 | break; |
| 303 | case RUA_Cause_PR_protocol: |
| 304 | switch (in->choice.protocol) { |
| 305 | case RUA_CauseProtocol_transfer_syntax_error: |
| 306 | break; |
| 307 | case RUA_CauseProtocol_abstract_syntax_error_reject: |
| 308 | break; |
| 309 | case RUA_CauseProtocol_abstract_syntax_error_ignore_and_notify: |
| 310 | break; |
| 311 | case RUA_CauseProtocol_message_not_compatible_with_receiver_state: |
| 312 | break; |
| 313 | case RUA_CauseProtocol_semantic_error: |
| 314 | break; |
| 315 | case RUA_CauseProtocol_unspecified: |
| 316 | break; |
| 317 | case RUA_CauseProtocol_abstract_syntax_error_falsely_constructed_message: |
| 318 | break; |
| 319 | } |
| 320 | break; |
| 321 | case RUA_Cause_PR_misc: |
| 322 | switch (in->choice.misc) { |
| 323 | case RUA_CauseMisc_processing_overload: |
| 324 | break; |
| 325 | case RUA_CauseMisc_hardware_failure: |
| 326 | break; |
| 327 | case RUA_CauseMisc_o_and_m_intervention: |
| 328 | break; |
| 329 | case RUA_CauseMisc_unspecified: |
| 330 | break; |
| 331 | } |
| 332 | break; |
| 333 | default: |
| 334 | break; |
| 335 | } |
| 336 | #else |
| 337 | return 0; |
| 338 | #endif |
| 339 | |
| 340 | } |
| 341 | |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 342 | static int rua_rx_init_connect(struct msgb *msg, ANY_t *in) |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 343 | { |
| 344 | RUA_ConnectIEs_t ies; |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 345 | struct hnb_context *hnb = msg->dst; |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 346 | uint32_t context_id; |
| 347 | int rc; |
| 348 | |
| 349 | rc = rua_decode_connecties(&ies, in); |
| 350 | if (rc < 0) |
| 351 | return rc; |
| 352 | |
Harald Welte | b0de906 | 2015-12-24 14:10:17 +0100 | [diff] [blame] | 353 | context_id = asn1bitstr_to_u24(&ies.context_ID); |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 354 | |
Neels Hofmeyr | c361431 | 2017-07-03 14:34:38 +0200 | [diff] [blame] | 355 | DEBUGP(DRUA, "RUA %s Connect.req(ctx=0x%x, %s)\n", |
| 356 | cn_domain_indicator_to_str(ies.cN_DomainIndicator), |
| 357 | context_id, |
| 358 | ies.establishment_Cause == RUA_Establishment_Cause_emergency_call |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 359 | ? "emergency" : "normal"); |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 360 | |
Neels Hofmeyr | 12ed975 | 2017-07-03 16:33:14 +0200 | [diff] [blame] | 361 | 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] | 362 | context_id, 0, ies.ranaP_Message.buf, |
| 363 | ies.ranaP_Message.size); |
Neels Hofmeyr | 23f3fdc | 2017-12-25 00:00:04 +0100 | [diff] [blame] | 364 | |
Daniel Willmann | 11e912a | 2016-01-07 13:19:30 +0100 | [diff] [blame] | 365 | rua_free_connecties(&ies); |
Harald Welte | 0f0ea81 | 2015-09-11 18:58:28 +0200 | [diff] [blame] | 366 | |
| 367 | return rc; |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 368 | } |
| 369 | |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 370 | static int rua_rx_init_disconnect(struct msgb *msg, ANY_t *in) |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 371 | { |
| 372 | RUA_DisconnectIEs_t ies; |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 373 | struct hnb_context *hnb = msg->dst; |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 374 | uint32_t context_id; |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 375 | uint32_t scu_cause; |
| 376 | uint8_t *ranap_data = NULL; |
| 377 | unsigned int ranap_len = 0; |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 378 | int rc; |
| 379 | |
| 380 | rc = rua_decode_disconnecties(&ies, in); |
| 381 | if (rc < 0) |
| 382 | return rc; |
| 383 | |
Harald Welte | b0de906 | 2015-12-24 14:10:17 +0100 | [diff] [blame] | 384 | context_id = asn1bitstr_to_u24(&ies.context_ID); |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 385 | scu_cause = rua_to_scu_cause(&ies.cause); |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 386 | |
Harald Welte | 37166a2 | 2015-12-24 10:12:09 +0100 | [diff] [blame] | 387 | 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] | 388 | rua_cause_str(&ies.cause)); |
Harald Welte | 0f0ea81 | 2015-09-11 18:58:28 +0200 | [diff] [blame] | 389 | |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 390 | if (ies.presenceMask & DISCONNECTIES_RUA_RANAP_MESSAGE_PRESENT) { |
| 391 | ranap_data = ies.ranaP_Message.buf; |
| 392 | ranap_len = ies.ranaP_Message.size; |
| 393 | } |
| 394 | |
Neels Hofmeyr | 12ed975 | 2017-07-03 16:33:14 +0200 | [diff] [blame] | 395 | rc = rua_to_scu(hnb, ies.cN_DomainIndicator, |
| 396 | OSMO_SCU_PRIM_N_DISCONNECT, |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 397 | context_id, scu_cause, ranap_data, ranap_len); |
Neels Hofmeyr | fe87809 | 2016-11-25 13:13:31 +0100 | [diff] [blame] | 398 | |
Daniel Willmann | 11e912a | 2016-01-07 13:19:30 +0100 | [diff] [blame] | 399 | rua_free_disconnecties(&ies); |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 400 | |
Harald Welte | 0f0ea81 | 2015-09-11 18:58:28 +0200 | [diff] [blame] | 401 | return rc; |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 402 | } |
| 403 | |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 404 | static int rua_rx_init_dt(struct msgb *msg, ANY_t *in) |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 405 | { |
| 406 | RUA_DirectTransferIEs_t ies; |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 407 | struct hnb_context *hnb = msg->dst; |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 408 | uint32_t context_id; |
| 409 | int rc; |
| 410 | |
| 411 | rc = rua_decode_directtransferies(&ies, in); |
| 412 | if (rc < 0) |
| 413 | return rc; |
| 414 | |
Harald Welte | b0de906 | 2015-12-24 14:10:17 +0100 | [diff] [blame] | 415 | context_id = asn1bitstr_to_u24(&ies.context_ID); |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 416 | |
Harald Welte | 37166a2 | 2015-12-24 10:12:09 +0100 | [diff] [blame] | 417 | DEBUGP(DRUA, "RUA Data.req(ctx=0x%x)\n", context_id); |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 418 | |
Neels Hofmeyr | 12ed975 | 2017-07-03 16:33:14 +0200 | [diff] [blame] | 419 | rc = rua_to_scu(hnb, |
| 420 | ies.cN_DomainIndicator, |
| 421 | OSMO_SCU_PRIM_N_DATA, |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 422 | context_id, 0, ies.ranaP_Message.buf, |
| 423 | ies.ranaP_Message.size); |
Neels Hofmeyr | fe87809 | 2016-11-25 13:13:31 +0100 | [diff] [blame] | 424 | |
Daniel Willmann | 11e912a | 2016-01-07 13:19:30 +0100 | [diff] [blame] | 425 | rua_free_directtransferies(&ies); |
Harald Welte | 0f0ea81 | 2015-09-11 18:58:28 +0200 | [diff] [blame] | 426 | |
| 427 | return rc; |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 428 | } |
| 429 | |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 430 | static int rua_rx_init_udt(struct msgb *msg, ANY_t *in) |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 431 | { |
| 432 | RUA_ConnectionlessTransferIEs_t ies; |
| 433 | int rc; |
| 434 | |
| 435 | rc = rua_decode_connectionlesstransferies(&ies, in); |
| 436 | if (rc < 0) |
| 437 | return rc; |
| 438 | |
Harald Welte | 37166a2 | 2015-12-24 10:12:09 +0100 | [diff] [blame] | 439 | DEBUGP(DRUA, "RUA UData.req()\n"); |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 440 | |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 441 | /* according tot the spec, we can primarily receive Overload, |
| 442 | * Reset, Reset ACK, Error Indication, reset Resource, Reset |
| 443 | * Resurce Acknowledge as connecitonless RANAP. There are some |
| 444 | * more messages regarding Information Transfer, Direct |
| 445 | * Information Transfer and Uplink Information Trnansfer that we |
| 446 | * can ignore. In either case, it is RANAP that we need to |
| 447 | * decode... */ |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 448 | 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] | 449 | rua_free_connectionlesstransferies(&ies); |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 450 | |
| 451 | return rc; |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 452 | } |
| 453 | |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 454 | |
| 455 | 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] | 456 | { |
| 457 | RUA_ErrorIndicationIEs_t ies; |
| 458 | int rc; |
| 459 | |
| 460 | rc = rua_decode_errorindicationies(&ies, in); |
| 461 | if (rc < 0) |
| 462 | return rc; |
| 463 | |
Harald Welte | 831e1ee | 2015-12-25 10:28:55 +0100 | [diff] [blame] | 464 | LOGP(DRUA, LOGL_ERROR, "RUA UData.ErrorInd(%s)\n", |
| 465 | rua_cause_str(&ies.cause)); |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 466 | |
Daniel Willmann | 11e912a | 2016-01-07 13:19:30 +0100 | [diff] [blame] | 467 | rua_free_errorindicationies(&ies); |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 468 | return rc; |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 469 | } |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 470 | |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 471 | 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] | 472 | { |
| 473 | int rc; |
| 474 | |
| 475 | switch (imsg->procedureCode) { |
| 476 | case RUA_ProcedureCode_id_Connect: |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 477 | rc = rua_rx_init_connect(msg, &imsg->value); |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 478 | break; |
| 479 | case RUA_ProcedureCode_id_DirectTransfer: |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 480 | rc = rua_rx_init_dt(msg, &imsg->value); |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 481 | break; |
| 482 | case RUA_ProcedureCode_id_Disconnect: |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 483 | rc = rua_rx_init_disconnect(msg, &imsg->value); |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 484 | break; |
| 485 | case RUA_ProcedureCode_id_ConnectionlessTransfer: |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 486 | rc = rua_rx_init_udt(msg, &imsg->value); |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 487 | break; |
| 488 | case RUA_ProcedureCode_id_ErrorIndication: |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 489 | rc = rua_rx_init_err_ind(msg, &imsg->value); |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 490 | break; |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 491 | case RUA_ProcedureCode_id_privateMessage: |
Neels Hofmeyr | 2b5021f | 2016-11-25 13:25:38 +0100 | [diff] [blame] | 492 | LOGP(DRUA, LOGL_NOTICE, |
| 493 | "Unhandled: RUA Initiating Msg: Private Msg\n"); |
| 494 | rc = 0; |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 495 | break; |
| 496 | default: |
Harald Welte | da86fe5 | 2017-11-21 08:14:37 +0100 | [diff] [blame] | 497 | LOGP(DRUA, LOGL_NOTICE, "Unknown RUA Procedure %lu\n", |
Harald Welte | 37166a2 | 2015-12-24 10:12:09 +0100 | [diff] [blame] | 498 | imsg->procedureCode); |
| 499 | rc = -1; |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 500 | } |
Harald Welte | 37166a2 | 2015-12-24 10:12:09 +0100 | [diff] [blame] | 501 | |
| 502 | return rc; |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 503 | } |
| 504 | |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 505 | 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] | 506 | { |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 507 | /* FIXME */ |
Harald Welte | 37166a2 | 2015-12-24 10:12:09 +0100 | [diff] [blame] | 508 | LOGP(DRUA, LOGL_NOTICE, "Unexpected RUA Sucessful Outcome\n"); |
| 509 | return -1; |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 510 | } |
| 511 | |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 512 | 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] | 513 | { |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 514 | /* FIXME */ |
Harald Welte | 37166a2 | 2015-12-24 10:12:09 +0100 | [diff] [blame] | 515 | LOGP(DRUA, LOGL_NOTICE, "Unexpected RUA Unsucessful Outcome\n"); |
| 516 | return -1; |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 517 | } |
| 518 | |
| 519 | |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 520 | 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] | 521 | { |
| 522 | int rc; |
| 523 | |
| 524 | /* it's a bit odd that we can't dispatch on procedure code, but |
| 525 | * that's not possible */ |
| 526 | switch (pdu->present) { |
| 527 | case RUA_RUA_PDU_PR_initiatingMessage: |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 528 | rc = rua_rx_initiating_msg(msg, &pdu->choice.initiatingMessage); |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 529 | break; |
| 530 | case RUA_RUA_PDU_PR_successfulOutcome: |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 531 | rc = rua_rx_successful_outcome_msg(msg, &pdu->choice.successfulOutcome); |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 532 | break; |
| 533 | case RUA_RUA_PDU_PR_unsuccessfulOutcome: |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 534 | rc = rua_rx_unsuccessful_outcome_msg(msg, &pdu->choice.unsuccessfulOutcome); |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 535 | break; |
| 536 | default: |
Harald Welte | 37166a2 | 2015-12-24 10:12:09 +0100 | [diff] [blame] | 537 | LOGP(DRUA, LOGL_NOTICE, "Unknown RUA presence %u\n", pdu->present); |
| 538 | rc = -1; |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 539 | } |
Harald Welte | 37166a2 | 2015-12-24 10:12:09 +0100 | [diff] [blame] | 540 | |
| 541 | return rc; |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 542 | } |
| 543 | |
| 544 | int hnbgw_rua_rx(struct hnb_context *hnb, struct msgb *msg) |
| 545 | { |
| 546 | RUA_RUA_PDU_t _pdu, *pdu = &_pdu; |
| 547 | asn_dec_rval_t dec_ret; |
| 548 | int rc; |
| 549 | |
| 550 | /* decode and handle to _hnbgw_hnbap_rx() */ |
| 551 | |
| 552 | memset(pdu, 0, sizeof(*pdu)); |
| 553 | dec_ret = aper_decode(NULL, &asn_DEF_RUA_RUA_PDU, (void **) &pdu, |
| 554 | msg->data, msgb_length(msg), 0, 0); |
| 555 | if (dec_ret.code != RC_OK) { |
Harald Welte | f42317b | 2015-12-23 15:36:31 +0100 | [diff] [blame] | 556 | LOGP(DRUA, LOGL_ERROR, "Error in ASN.1 decode\n"); |
Neels Hofmeyr | a6a68e6 | 2016-11-25 13:21:02 +0100 | [diff] [blame] | 557 | return -1; |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 558 | } |
| 559 | |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 560 | rc = _hnbgw_rua_rx(msg, pdu); |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 561 | |
| 562 | return rc; |
| 563 | } |
| 564 | |
| 565 | |
| 566 | int hnbgw_rua_init(void) |
| 567 | { |
Harald Welte | c4338de | 2015-12-24 00:40:52 +0100 | [diff] [blame] | 568 | return 0; |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 569 | } |