Harald Welte | 3aad6af | 2015-12-26 08:43:04 +0100 | [diff] [blame] | 1 | #include <stdint.h> |
| 2 | #include <unistd.h> |
| 3 | #include <stdlib.h> |
| 4 | #include <stdio.h> |
| 5 | #include <string.h> |
| 6 | |
| 7 | #include <osmocom/core/select.h> |
| 8 | #include <osmocom/core/prim.h> |
| 9 | #include <osmocom/core/talloc.h> |
| 10 | #include <osmocom/core/logging.h> |
| 11 | #include <osmocom/core/application.h> |
| 12 | #include <osmocom/vty/logging.h> |
| 13 | |
Harald Welte | 1be24f1 | 2015-12-26 23:44:28 +0100 | [diff] [blame] | 14 | #include <osmocom/gsm/gsm48.h> |
| 15 | |
Harald Welte | 3aad6af | 2015-12-26 08:43:04 +0100 | [diff] [blame] | 16 | #include <osmocom/sigtran/sua.h> |
| 17 | #include <osmocom/sigtran/sccp_sap.h> |
| 18 | |
| 19 | #include "test_common.h" |
Harald Welte | 1be24f1 | 2015-12-26 23:44:28 +0100 | [diff] [blame] | 20 | |
| 21 | #include "ranap_ies_defs.h" |
Harald Welte | 3aad6af | 2015-12-26 08:43:04 +0100 | [diff] [blame] | 22 | #include "ranap_common_cn.h" |
| 23 | #include "hnbgw.h" |
| 24 | |
| 25 | int asn1_xer_print = 1; |
| 26 | |
Harald Welte | 2bc20f8 | 2015-12-26 23:43:48 +0100 | [diff] [blame] | 27 | struct ue_conn_ctx { |
| 28 | struct llist_head list; |
| 29 | struct osmo_sua_link *link; |
| 30 | uint32_t conn_id; |
| 31 | }; |
| 32 | |
| 33 | static LLIST_HEAD(conn_ctx_list); |
| 34 | |
| 35 | struct ue_conn_ctx *ue_conn_ctx_alloc(struct osmo_sua_link *link, uint32_t conn_id) |
| 36 | { |
| 37 | struct ue_conn_ctx *ctx = talloc_zero(NULL, struct ue_conn_ctx); |
| 38 | |
| 39 | ctx->link = link; |
| 40 | ctx->conn_id = conn_id; |
| 41 | llist_add(&ctx->list, &conn_ctx_list); |
| 42 | |
| 43 | return ctx; |
| 44 | } |
| 45 | |
| 46 | struct ue_conn_ctx *ue_conn_ctx_find(struct osmo_sua_link *link, uint32_t conn_id) |
| 47 | { |
| 48 | struct ue_conn_ctx *ctx; |
| 49 | |
| 50 | llist_for_each_entry(ctx, &conn_ctx_list, list) { |
| 51 | if (ctx->link == link && ctx->conn_id == conn_id) |
| 52 | return ctx; |
| 53 | } |
| 54 | return NULL; |
| 55 | } |
| 56 | |
Harald Welte | 3aad6af | 2015-12-26 08:43:04 +0100 | [diff] [blame] | 57 | /*********************************************************************** |
| 58 | * RANAP handling |
| 59 | ***********************************************************************/ |
| 60 | |
Harald Welte | 1be24f1 | 2015-12-26 23:44:28 +0100 | [diff] [blame] | 61 | static int ranap_handle_co_initial_ue(void *ctx, RANAP_InitialUE_MessageIEs_t *ies) |
Harald Welte | 3aad6af | 2015-12-26 08:43:04 +0100 | [diff] [blame] | 62 | { |
| 63 | struct gprs_ra_id ra_id; |
| 64 | uint16_t sai; |
| 65 | struct msgb *msg = msgb_alloc(256, "RANAP->NAS"); |
| 66 | uint8_t *cur; |
| 67 | |
Harald Welte | 1be24f1 | 2015-12-26 23:44:28 +0100 | [diff] [blame] | 68 | ranap_parse_lai(&ra_id, &ies->lai); |
| 69 | sai = asn1str_to_u16(&ies->sai.sAC); |
| 70 | cur = msgb_put(msg, ies->nas_pdu.size); |
| 71 | memcpy(msg, ies->nas_pdu.buf, ies->nas_pdu.size); |
Harald Welte | 3aad6af | 2015-12-26 08:43:04 +0100 | [diff] [blame] | 72 | /* FIXME: set msgb_gmmh() */ |
| 73 | |
| 74 | /* FIXME: Feed into the MM layer */ |
Harald Welte | 1be24f1 | 2015-12-26 23:44:28 +0100 | [diff] [blame] | 75 | //rc = gsm0408_gprs_rcvmsg_iu(msg, ra_id, sai, conn_id); |
Harald Welte | 3aad6af | 2015-12-26 08:43:04 +0100 | [diff] [blame] | 76 | |
| 77 | return 0; |
| 78 | } |
| 79 | |
| 80 | static int ranap_handle_co_dt(void *ctx, RANAP_DirectTransferIEs_t *ies) |
| 81 | { |
| 82 | struct gprs_ra_id _ra_id, *ra_id = NULL; |
| 83 | uint16_t _sai, *sai = NULL; |
| 84 | struct msgb *msg = msgb_alloc(256, "RANAP->NAS"); |
| 85 | uint8_t *cur; |
| 86 | |
Harald Welte | 1be24f1 | 2015-12-26 23:44:28 +0100 | [diff] [blame] | 87 | if (ies->presenceMask & DIRECTTRANSFERIES_RANAP_LAI_PRESENT) { |
| 88 | ranap_parse_lai(&_ra_id, &ies->lai); |
Harald Welte | 3aad6af | 2015-12-26 08:43:04 +0100 | [diff] [blame] | 89 | ra_id = &_ra_id; |
Harald Welte | 1be24f1 | 2015-12-26 23:44:28 +0100 | [diff] [blame] | 90 | if (ies->presenceMask & DIRECTTRANSFERIES_RANAP_RAC_PRESENT) { |
| 91 | _ra_id.rac = asn1str_to_u8(&ies->rac); |
Harald Welte | 3aad6af | 2015-12-26 08:43:04 +0100 | [diff] [blame] | 92 | } |
Harald Welte | 1be24f1 | 2015-12-26 23:44:28 +0100 | [diff] [blame] | 93 | if (ies->presenceMask & DIRECTTRANSFERIES_RANAP_SAI_PRESENT) { |
| 94 | _sai = asn1str_to_u16(&ies->sai.sAC); |
Harald Welte | 3aad6af | 2015-12-26 08:43:04 +0100 | [diff] [blame] | 95 | sai = &_sai; |
| 96 | } |
| 97 | } |
| 98 | |
Harald Welte | 1be24f1 | 2015-12-26 23:44:28 +0100 | [diff] [blame] | 99 | cur = msgb_put(msg, ies->nas_pdu.size); |
| 100 | memcpy(msg, ies->nas_pdu.buf, ies->nas_pdu.size); |
Harald Welte | 3aad6af | 2015-12-26 08:43:04 +0100 | [diff] [blame] | 101 | /* FIXME: set msgb_gmmh() */ |
| 102 | |
| 103 | /* FIXME: Feed into the MM/CC/SMS-CP layer */ |
Harald Welte | 1be24f1 | 2015-12-26 23:44:28 +0100 | [diff] [blame] | 104 | //rc = gsm0408_gprs_rcvmsg_iu(msg, ra_id, sai, conn_id); |
Harald Welte | 3aad6af | 2015-12-26 08:43:04 +0100 | [diff] [blame] | 105 | |
| 106 | return 0; |
| 107 | } |
| 108 | |
| 109 | static int ranap_handle_co_err_ind(void *ctx, RANAP_ErrorIndicationIEs_t *ies) |
| 110 | { |
| 111 | if (ies->presenceMask & ERRORINDICATIONIES_RANAP_CAUSE_PRESENT) |
| 112 | LOGP(DRANAP, LOGL_ERROR, "Rx Error Indication (%s)\n", |
| 113 | ranap_cause_str(&ies->cause)); |
| 114 | else |
| 115 | LOGP(DRANAP, LOGL_ERROR, "Rx Error Indication\n"); |
| 116 | |
| 117 | return 0; |
| 118 | } |
| 119 | |
Harald Welte | 0744d6f | 2015-12-26 23:45:18 +0100 | [diff] [blame] | 120 | static int ranap_handle_co_iu_rel_req(struct ue_conn_ctx *ctx, RANAP_Iu_ReleaseRequestIEs_t *ies) |
| 121 | { |
| 122 | struct msgb *msg; |
| 123 | struct osmo_scu_prim *prim; |
| 124 | |
| 125 | LOGP(DRANAP, LOGL_INFO, "Received Iu Release Request, Sending Release Command\n"); |
| 126 | msg = ranap_new_msg_iu_rel_cmd(&ies->cause); |
| 127 | msg->l2h = msg->data; |
| 128 | prim = (struct osmo_scu_prim *) msgb_push(msg, sizeof(*prim)); |
| 129 | prim->u.data.conn_id = ctx->conn_id; |
| 130 | osmo_prim_init(&prim->oph, SCCP_SAP_USER, |
| 131 | OSMO_SCU_PRIM_N_DATA, |
| 132 | PRIM_OP_REQUEST, msg); |
| 133 | osmo_sua_user_link_down(ctx->link, &prim->oph); |
| 134 | return 0; |
| 135 | } |
| 136 | |
Harald Welte | 3aad6af | 2015-12-26 08:43:04 +0100 | [diff] [blame] | 137 | /* Entry point for connection-oriented ANAP message */ |
| 138 | int cn_ranap_handle_co(void *ctx, ranap_message *message) |
| 139 | { |
| 140 | int rc = 0; |
| 141 | |
| 142 | switch (message->direction) { |
| 143 | case RANAP_RANAP_PDU_PR_initiatingMessage: |
| 144 | switch (message->procedureCode) { |
| 145 | case RANAP_ProcedureCode_id_InitialUE_Message: |
| 146 | rc = ranap_handle_co_initial_ue(ctx, &message->msg.initialUE_MessageIEs); |
| 147 | break; |
| 148 | case RANAP_ProcedureCode_id_DirectTransfer: |
| 149 | rc = ranap_handle_co_dt(ctx, &message->msg.directTransferIEs); |
| 150 | break; |
| 151 | case RANAP_ProcedureCode_id_ErrorIndication: |
| 152 | rc = ranap_handle_co_err_ind(ctx, &message->msg.errorIndicationIEs); |
| 153 | break; |
Harald Welte | 0744d6f | 2015-12-26 23:45:18 +0100 | [diff] [blame] | 154 | case RANAP_ProcedureCode_id_Iu_ReleaseRequest: |
| 155 | /* Iu Release Request */ |
| 156 | rc = ranap_handle_co_iu_rel_req(ctx, &message->msg.iu_ReleaseRequestIEs); |
| 157 | break; |
Harald Welte | 3aad6af | 2015-12-26 08:43:04 +0100 | [diff] [blame] | 158 | } |
| 159 | break; |
| 160 | case RANAP_RANAP_PDU_PR_successfulOutcome: |
| 161 | switch (message->procedureCode) { |
| 162 | case RANAP_ProcedureCode_id_RAB_Assignment: |
| 163 | /* RAB Assignment Response */ |
| 164 | break; |
| 165 | case RANAP_ProcedureCode_id_SecurityModeControl: |
| 166 | /* Security Mode Complete */ |
| 167 | break; |
| 168 | case RANAP_ProcedureCode_id_Iu_Release: |
| 169 | /* Iu Release Complete */ |
| 170 | break; |
| 171 | } |
| 172 | case RANAP_RANAP_PDU_PR_unsuccessfulOutcome: |
| 173 | case RANAP_RANAP_PDU_PR_outcome: |
| 174 | default: |
| 175 | rc = -1; |
| 176 | break; |
| 177 | } |
| 178 | |
| 179 | return rc; |
| 180 | } |
| 181 | |
| 182 | static int ranap_handle_cl_reset_req(void *ctx, RANAP_ResetIEs_t *ies) |
| 183 | { |
| 184 | /* FIXME: send reset response */ |
| 185 | } |
| 186 | |
| 187 | static int ranap_handle_cl_err_ind(void *ctx, RANAP_ErrorIndicationIEs_t *ies) |
| 188 | { |
| 189 | if (ies->presenceMask & ERRORINDICATIONIES_RANAP_CAUSE_PRESENT) |
| 190 | LOGP(DRANAP, LOGL_ERROR, "Rx Error Indication (%s)\n", |
| 191 | ranap_cause_str(&ies->cause)); |
| 192 | else |
| 193 | LOGP(DRANAP, LOGL_ERROR, "Rx Error Indication\n"); |
| 194 | |
| 195 | return 0; |
| 196 | } |
| 197 | |
| 198 | /* Entry point for connection-less RANAP message */ |
| 199 | int cn_ranap_handle_cl(void *ctx, ranap_message *message) |
| 200 | { |
| 201 | int rc = 0; |
| 202 | |
| 203 | switch (message->direction) { |
| 204 | case RANAP_RANAP_PDU_PR_initiatingMessage: |
| 205 | switch (message->procedureCode) { |
| 206 | case RANAP_ProcedureCode_id_Reset: |
| 207 | /* received reset.req, send reset.resp */ |
| 208 | rc = ranap_handle_cl_reset_req(ctx, &message->msg.resetIEs); |
| 209 | break; |
| 210 | case RANAP_ProcedureCode_id_ErrorIndication: |
| 211 | rc = ranap_handle_cl_err_ind(ctx, &message->msg.errorIndicationIEs); |
| 212 | break; |
| 213 | } |
| 214 | break; |
| 215 | case RANAP_RANAP_PDU_PR_successfulOutcome: |
| 216 | case RANAP_RANAP_PDU_PR_unsuccessfulOutcome: |
| 217 | case RANAP_RANAP_PDU_PR_outcome: |
| 218 | default: |
| 219 | rc = -1; |
| 220 | break; |
| 221 | } |
| 222 | } |
| 223 | |
| 224 | /*********************************************************************** |
| 225 | * |
| 226 | ***********************************************************************/ |
| 227 | |
| 228 | int tx_unitdata(struct osmo_sua_link *link); |
| 229 | int tx_conn_req(struct osmo_sua_link *link, uint32_t conn_id); |
| 230 | |
| 231 | struct osmo_prim_hdr *make_conn_req(uint32_t conn_id); |
| 232 | struct osmo_prim_hdr *make_dt1_req(uint32_t conn_id, const uint8_t *data, unsigned int len); |
| 233 | |
| 234 | struct osmo_prim_hdr *make_conn_resp(struct osmo_scu_connect_param *param) |
| 235 | { |
| 236 | struct msgb *msg = msgb_alloc(1024, "conn_resp"); |
| 237 | struct osmo_scu_prim *prim; |
| 238 | |
| 239 | prim = (struct osmo_scu_prim *) msgb_put(msg, sizeof(*prim)); |
| 240 | osmo_prim_init(&prim->oph, SCCP_SAP_USER, |
| 241 | OSMO_SCU_PRIM_N_CONNECT, |
| 242 | PRIM_OP_RESPONSE, msg); |
| 243 | memcpy(&prim->u.connect, param, sizeof(prim->u.connect)); |
| 244 | return &prim->oph; |
| 245 | } |
| 246 | |
| 247 | static int sccp_sap_up(struct osmo_prim_hdr *oph, void *link) |
| 248 | { |
| 249 | struct osmo_scu_prim *prim = (struct osmo_scu_prim *) oph; |
| 250 | struct osmo_prim_hdr *resp = NULL; |
| 251 | const uint8_t payload[] = { 0xb1, 0xb2, 0xb3 }; |
| 252 | int rc; |
Harald Welte | 2bc20f8 | 2015-12-26 23:43:48 +0100 | [diff] [blame] | 253 | struct ue_conn_ctx *ue; |
Harald Welte | 3aad6af | 2015-12-26 08:43:04 +0100 | [diff] [blame] | 254 | |
| 255 | printf("sccp_sap_up(%s)\n", osmo_scu_prim_name(oph)); |
| 256 | |
| 257 | switch (OSMO_PRIM_HDR(oph)) { |
| 258 | case OSMO_PRIM(OSMO_SCU_PRIM_N_CONNECT, PRIM_OP_CONFIRM): |
| 259 | /* confirmation of outbound connection */ |
| 260 | break; |
| 261 | case OSMO_PRIM(OSMO_SCU_PRIM_N_CONNECT, PRIM_OP_INDICATION): |
| 262 | /* indication of new inbound connection request*/ |
| 263 | printf("N-CONNECT.ind(X->%u)\n", prim->u.connect.conn_id); |
| 264 | if (/* prim->u.connect.called_addr.ssn != OSMO_SCCP_SSN_RANAP || */ |
| 265 | !msgb_l2(oph->msg) || msgb_l2len(oph->msg) == 0) { |
| 266 | LOGP(DMAIN, LOGL_NOTICE, "Received invalid N-CONNECT.ind\n"); |
| 267 | return 0; |
| 268 | } |
| 269 | /* FIXME: allocate UE context */ |
Harald Welte | 2bc20f8 | 2015-12-26 23:43:48 +0100 | [diff] [blame] | 270 | ue = ue_conn_ctx_alloc(link, prim->u.connect.conn_id); |
Harald Welte | 3aad6af | 2015-12-26 08:43:04 +0100 | [diff] [blame] | 271 | /* first ensure the local SUA/SCCP socket is ACTIVE */ |
| 272 | resp = make_conn_resp(&prim->u.connect); |
| 273 | osmo_sua_user_link_down(link, resp); |
| 274 | /* then handle the RANAP payload */ |
| 275 | rc = cn_ranap_rx_co(ue, msgb_l2(oph->msg), msgb_l2len(oph->msg)); |
| 276 | break; |
| 277 | case OSMO_PRIM(OSMO_SCU_PRIM_N_DISCONNECT, PRIM_OP_INDICATION): |
| 278 | /* indication of disconnect */ |
| 279 | printf("N-DISCONNECT.ind(%u)\n", prim->u.disconnect.conn_id); |
Harald Welte | 4e2783f | 2015-12-26 23:49:52 +0100 | [diff] [blame] | 280 | ue = ue_conn_ctx_find(link, prim->u.disconnect.conn_id); |
| 281 | rc = cn_ranap_rx_co(ue, msgb_l2(oph->msg), msgb_l2len(oph->msg)); |
Harald Welte | 3aad6af | 2015-12-26 08:43:04 +0100 | [diff] [blame] | 282 | break; |
| 283 | case OSMO_PRIM(OSMO_SCU_PRIM_N_DATA, PRIM_OP_INDICATION): |
| 284 | /* connection-oriented data received */ |
| 285 | printf("N-DATA.ind(%u, %s)\n", prim->u.data.conn_id, |
| 286 | osmo_hexdump(msgb_l2(oph->msg), msgb_l2len(oph->msg))); |
Harald Welte | 2bc20f8 | 2015-12-26 23:43:48 +0100 | [diff] [blame] | 287 | /* resolve UE context */ |
| 288 | ue = ue_conn_ctx_find(link, prim->u.data.conn_id); |
Harald Welte | 3aad6af | 2015-12-26 08:43:04 +0100 | [diff] [blame] | 289 | rc = cn_ranap_rx_co(ue, msgb_l2(oph->msg), msgb_l2len(oph->msg)); |
| 290 | break; |
| 291 | case OSMO_PRIM(OSMO_SCU_PRIM_N_UNITDATA, PRIM_OP_INDICATION): |
| 292 | /* connection-oriented data received */ |
| 293 | printf("N-UNITDATA.ind(%s)\n", |
| 294 | osmo_hexdump(msgb_l2(oph->msg), msgb_l2len(oph->msg))); |
| 295 | rc = cn_ranap_rx_cl(link, msgb_l2(oph->msg), msgb_l2len(oph->msg)); |
| 296 | break; |
| 297 | } |
| 298 | |
| 299 | msgb_free(oph->msg); |
| 300 | return 0; |
| 301 | } |
| 302 | |
| 303 | int main(int argc, char **argv) |
| 304 | { |
| 305 | struct osmo_sua_user *user; |
| 306 | void *ctx = talloc_named_const(NULL, 1, "root"); |
| 307 | int rc; |
| 308 | |
| 309 | osmo_sua_set_log_area(DSUA); |
| 310 | |
| 311 | test_common_init(); |
| 312 | |
Harald Welte | 2ebe42f | 2015-12-26 23:38:38 +0100 | [diff] [blame] | 313 | user = osmo_sua_user_create(ctx, sccp_sap_up, ctx); |
Harald Welte | 3aad6af | 2015-12-26 08:43:04 +0100 | [diff] [blame] | 314 | |
| 315 | rc = osmo_sua_server_listen(user, "127.0.0.1", 14001); |
| 316 | if (rc < 0) { |
| 317 | exit(1); |
| 318 | } |
| 319 | |
| 320 | while (1) { |
| 321 | osmo_select_main(0); |
| 322 | } |
| 323 | } |