Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 1 | #include <stdint.h> |
| 2 | #include <string.h> |
| 3 | #include <unistd.h> |
| 4 | #include <pthread.h> |
| 5 | |
| 6 | #include <osmocom/core/linuxlist.h> |
| 7 | #include <osmocom/core/select.h> |
| 8 | #include <osmocom/core/fsm.h> |
| 9 | #include <osmocom/core/logging.h> |
| 10 | #include <osmocom/core/socket.h> |
| 11 | #include <osmocom/gsm/protocol/ipaccess.h> |
| 12 | #include <osmocom/abis/ipa.h> |
| 13 | |
| 14 | #include <osmocom/rspro/RsproPDU.h> |
| 15 | |
| 16 | #include "debug.h" |
| 17 | #include "rspro_util.h" |
| 18 | #include "rspro_server.h" |
| 19 | |
| 20 | #define S(x) (1 << (x)) |
| 21 | |
| 22 | static void client_slot2rspro(ClientSlot_t *out, const struct client_slot *in) |
| 23 | { |
| 24 | out->clientId = in->client_id; |
| 25 | out->slotNr = in->slot_nr; |
| 26 | } |
| 27 | |
Harald Welte | e5c7773 | 2019-03-07 23:58:24 +0100 | [diff] [blame] | 28 | static void rspro2client_slot(struct client_slot *out, const ClientSlot_t *in) |
| 29 | { |
| 30 | out->client_id = in->clientId; |
| 31 | out->slot_nr = in->slotNr; |
| 32 | } |
| 33 | |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 34 | static void bank_slot2rspro(BankSlot_t *out, const struct bank_slot *in) |
| 35 | { |
| 36 | out->bankId = in->bank_id; |
| 37 | out->slotNr = in->slot_nr; |
| 38 | } |
| 39 | |
| 40 | static RsproPDU_t *slotmap2CreateMappingReq(const struct slot_mapping *slotmap) |
| 41 | { |
| 42 | ClientSlot_t clslot; |
| 43 | BankSlot_t bslot; |
| 44 | |
| 45 | client_slot2rspro(&clslot, &slotmap->client); |
| 46 | bank_slot2rspro(&bslot, &slotmap->bank); |
| 47 | |
| 48 | return rspro_gen_CreateMappingReq(&clslot, &bslot); |
| 49 | } |
| 50 | |
| 51 | static RsproPDU_t *slotmap2RemoveMappingReq(const struct slot_mapping *slotmap) |
| 52 | { |
| 53 | ClientSlot_t clslot; |
| 54 | BankSlot_t bslot; |
| 55 | |
| 56 | client_slot2rspro(&clslot, &slotmap->client); |
| 57 | bank_slot2rspro(&bslot, &slotmap->bank); |
| 58 | |
| 59 | return rspro_gen_RemoveMappingReq(&clslot, &bslot); |
| 60 | } |
| 61 | |
| 62 | |
| 63 | static void client_conn_send(struct rspro_client_conn *conn, RsproPDU_t *pdu) |
| 64 | { |
| 65 | struct msgb *msg_tx = rspro_enc_msg(pdu); |
| 66 | if (!msg_tx) { |
| 67 | ASN_STRUCT_FREE(asn_DEF_RsproPDU, pdu); |
| 68 | return; |
| 69 | } |
| 70 | ipa_prepend_header_ext(msg_tx, IPAC_PROTO_EXT_RSPRO); |
| 71 | ipa_msg_push_header(msg_tx, IPAC_PROTO_OSMO); |
| 72 | ipa_server_conn_send(conn->peer, msg_tx); |
| 73 | } |
| 74 | |
| 75 | |
| 76 | /*********************************************************************** |
| 77 | * per-client connection FSM |
| 78 | ***********************************************************************/ |
| 79 | |
| 80 | static void rspro_client_conn_destroy(struct rspro_client_conn *conn); |
| 81 | |
| 82 | enum remsim_server_client_fsm_state { |
| 83 | CLNTC_ST_INIT, |
| 84 | CLNTC_ST_ESTABLISHED, |
Harald Welte | e5c7773 | 2019-03-07 23:58:24 +0100 | [diff] [blame] | 85 | CLNTC_ST_WAIT_CONF_RES, /* waiting for ConfigClientRes */ |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 86 | CLNTC_ST_CONNECTED, |
| 87 | }; |
| 88 | |
| 89 | enum remsim_server_client_event { |
| 90 | CLNTC_E_TCP_UP, |
| 91 | CLNTC_E_CLIENT_CONN, /* Connect{Client,Bank}Req received */ |
| 92 | CLNTC_E_BANK_CONN, |
| 93 | CLNTC_E_TCP_DOWN, |
Harald Welte | 15b75e1 | 2019-03-08 16:55:46 +0100 | [diff] [blame] | 94 | CLNTC_E_KA_TIMEOUT, |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 95 | CLNTC_E_CREATE_MAP_RES, /* CreateMappingRes received */ |
| 96 | CLNTC_E_REMOVE_MAP_RES, /* RemoveMappingRes received */ |
Harald Welte | e5c7773 | 2019-03-07 23:58:24 +0100 | [diff] [blame] | 97 | CLNTC_E_CONFIG_CL_RES, /* ConfigClientRes received */ |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 98 | CLNTC_E_PUSH, /* drain maps_new or maps_delreq */ |
| 99 | }; |
| 100 | |
| 101 | static const struct value_string server_client_event_names[] = { |
| 102 | OSMO_VALUE_STRING(CLNTC_E_TCP_UP), |
| 103 | OSMO_VALUE_STRING(CLNTC_E_CLIENT_CONN), |
| 104 | OSMO_VALUE_STRING(CLNTC_E_BANK_CONN), |
| 105 | OSMO_VALUE_STRING(CLNTC_E_TCP_DOWN), |
Harald Welte | 15b75e1 | 2019-03-08 16:55:46 +0100 | [diff] [blame] | 106 | OSMO_VALUE_STRING(CLNTC_E_KA_TIMEOUT), |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 107 | OSMO_VALUE_STRING(CLNTC_E_CREATE_MAP_RES), |
| 108 | OSMO_VALUE_STRING(CLNTC_E_REMOVE_MAP_RES), |
Harald Welte | e5c7773 | 2019-03-07 23:58:24 +0100 | [diff] [blame] | 109 | OSMO_VALUE_STRING(CLNTC_E_CONFIG_CL_RES), |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 110 | OSMO_VALUE_STRING(CLNTC_E_PUSH), |
| 111 | { 0, NULL } |
| 112 | }; |
| 113 | |
| 114 | static void clnt_st_init(struct osmo_fsm_inst *fi, uint32_t event, void *data) |
| 115 | { |
| 116 | switch (event) { |
| 117 | case CLNTC_E_TCP_UP: |
| 118 | osmo_fsm_inst_state_chg(fi, CLNTC_ST_ESTABLISHED, 10, 1); |
| 119 | break; |
| 120 | default: |
| 121 | OSMO_ASSERT(0); |
| 122 | } |
| 123 | } |
| 124 | |
| 125 | static void clnt_st_established(struct osmo_fsm_inst *fi, uint32_t event, void *data) |
| 126 | { |
| 127 | struct rspro_client_conn *conn = fi->priv; |
| 128 | const RsproPDU_t *pdu = data; |
| 129 | const ConnectClientReq_t *cclreq = NULL; |
| 130 | const ConnectBankReq_t *cbreq = NULL; |
| 131 | RsproPDU_t *resp = NULL; |
| 132 | |
| 133 | switch (event) { |
| 134 | case CLNTC_E_CLIENT_CONN: |
| 135 | cclreq = &pdu->msg.choice.connectClientReq; |
| 136 | /* save the [remote] component identity in 'conn' */ |
| 137 | rspro_comp_id_retrieve(&conn->comp_id, &cclreq->identity); |
| 138 | if (conn->comp_id.type != ComponentType_remsimClient) { |
| 139 | LOGPFSM(fi, "ConnectClientReq from identity != Client ?!?\n"); |
| 140 | osmo_fsm_inst_term(fi, OSMO_FSM_TERM_ERROR, NULL); |
| 141 | } |
Harald Welte | e5c7773 | 2019-03-07 23:58:24 +0100 | [diff] [blame] | 142 | if (!cclreq->clientSlot) { |
| 143 | #if 0 |
| 144 | /* FIXME: determine ClientID */ |
| 145 | resp = rspro_gen_ConnectClientRes(&conn->srv->comp_id, ResultCode_ok); |
| 146 | client_conn_send(conn, resp); |
| 147 | osmo_fsm_inst_state_chg(fi, CLNTC_ST_WAIT_CL_CONF_RES, 3, 30); |
| 148 | #else |
| 149 | /* FIXME: the original plan was to dynamically assign a ClientID |
| 150 | * from server to client here. Send ConfigReq and transition to |
| 151 | * CLNTC_ST_WAIT_CONF_RES */ |
| 152 | LOGPFSM(fi, "ConnectClientReq without ClientId not supported yet!\n"); |
| 153 | osmo_fsm_inst_term(fi, OSMO_FSM_TERM_ERROR, NULL); |
| 154 | #endif |
| 155 | } else { |
| 156 | /* FIXME: check for unique-ness */ |
| 157 | rspro2client_slot(&conn->client.slot, cclreq->clientSlot); |
| 158 | osmo_fsm_inst_update_id_f(fi, "C%u:%u", conn->client.slot.client_id, |
| 159 | conn->client.slot.slot_nr); |
| 160 | resp = rspro_gen_ConnectClientRes(&conn->srv->comp_id, ResultCode_ok); |
| 161 | client_conn_send(conn, resp); |
| 162 | osmo_fsm_inst_state_chg(fi, CLNTC_ST_CONNECTED, 0, 0); |
| 163 | } |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 164 | |
| 165 | /* reparent us from srv->connections to srv->clients */ |
| 166 | pthread_rwlock_wrlock(&conn->srv->rwlock); |
| 167 | llist_del(&conn->list); |
| 168 | llist_add_tail(&conn->list, &conn->srv->clients); |
| 169 | pthread_rwlock_unlock(&conn->srv->rwlock); |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 170 | break; |
| 171 | case CLNTC_E_BANK_CONN: |
| 172 | cbreq = &pdu->msg.choice.connectBankReq; |
| 173 | /* save the [remote] component identity in 'conn' */ |
| 174 | rspro_comp_id_retrieve(&conn->comp_id, &cbreq->identity); |
| 175 | if (conn->comp_id.type != ComponentType_remsimBankd) { |
| 176 | LOGPFSM(fi, "ConnectBankReq from identity != Bank ?!?\n"); |
| 177 | osmo_fsm_inst_term(fi, OSMO_FSM_TERM_ERROR, NULL); |
| 178 | } |
Harald Welte | e5c7773 | 2019-03-07 23:58:24 +0100 | [diff] [blame] | 179 | /* FIXME: check for unique-ness */ |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 180 | conn->bank.bank_id = cbreq->bankId; |
| 181 | conn->bank.num_slots = cbreq->numberOfSlots; |
| 182 | osmo_fsm_inst_update_id_f(fi, "B%u", conn->bank.bank_id); |
| 183 | |
| 184 | /* reparent us from srv->connections to srv->banks */ |
| 185 | pthread_rwlock_wrlock(&conn->srv->rwlock); |
| 186 | llist_del(&conn->list); |
| 187 | llist_add_tail(&conn->list, &conn->srv->banks); |
| 188 | pthread_rwlock_unlock(&conn->srv->rwlock); |
| 189 | |
| 190 | /* send response to bank first */ |
| 191 | resp = rspro_gen_ConnectBankRes(&conn->srv->comp_id, ResultCode_ok); |
| 192 | client_conn_send(conn, resp); |
| 193 | |
| 194 | /* the state change will associate any pre-existing slotmaps */ |
| 195 | osmo_fsm_inst_state_chg(fi, CLNTC_ST_CONNECTED, 0, 0); |
| 196 | |
| 197 | osmo_fsm_inst_dispatch(fi, CLNTC_E_PUSH, NULL); |
| 198 | break; |
| 199 | default: |
| 200 | OSMO_ASSERT(0); |
| 201 | } |
| 202 | } |
| 203 | |
Harald Welte | e5c7773 | 2019-03-07 23:58:24 +0100 | [diff] [blame] | 204 | static void clnt_st_wait_cl_conf_res(struct osmo_fsm_inst *fi, uint32_t event, void *data) |
| 205 | { |
| 206 | switch (event) { |
| 207 | case CLNTC_E_CONFIG_CL_RES: |
| 208 | osmo_fsm_inst_state_chg(fi, CLNTC_ST_CONNECTED, 0, 0); |
| 209 | break; |
| 210 | default: |
| 211 | OSMO_ASSERT(0); |
| 212 | } |
| 213 | } |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 214 | |
| 215 | static void clnt_st_connected_cl_onenter(struct osmo_fsm_inst *fi, uint32_t prev_state) |
| 216 | { |
| 217 | #if 0 |
| 218 | struct rspro_client_conn *conn = fi->priv; |
| 219 | ClientSlot_t clslot; |
| 220 | RsproPDU_t *pdu; |
| 221 | |
| 222 | /* send configuration to this new client */ |
| 223 | client_slot2rspro(&clslot, FIXME); |
| 224 | pdu = rspro_gen_ConfigClientReq(&clslot, bankd_ip, bankd_port); |
| 225 | client_conn_send(conn, pdu); |
| 226 | #endif |
| 227 | } |
| 228 | |
| 229 | static void clnt_st_connected_bk_onenter(struct osmo_fsm_inst *fi, uint32_t prev_state) |
| 230 | { |
| 231 | struct rspro_client_conn *conn = fi->priv; |
| 232 | struct slotmaps *slotmaps = conn->srv->slotmaps; |
| 233 | struct slot_mapping *map; |
| 234 | |
| 235 | LOGPFSM(fi, "Associating pre-existing slotmaps (if any)\n"); |
| 236 | /* Link all known mappings to this new bank */ |
| 237 | slotmaps_wrlock(slotmaps); |
| 238 | llist_for_each_entry(map, &slotmaps->mappings, list) { |
| 239 | if (map->bank.bank_id == conn->bank.bank_id) |
| 240 | _slotmap_state_change(map, SLMAP_S_NEW, &conn->bank.maps_new); |
| 241 | } |
| 242 | slotmaps_unlock(slotmaps); |
| 243 | } |
| 244 | |
| 245 | static void clnt_st_connected_onenter(struct osmo_fsm_inst *fi, uint32_t prev_state) |
| 246 | { |
| 247 | struct rspro_client_conn *conn = fi->priv; |
| 248 | switch (conn->comp_id.type) { |
| 249 | case ComponentType_remsimClient: |
| 250 | clnt_st_connected_cl_onenter(fi, prev_state); |
| 251 | break; |
| 252 | case ComponentType_remsimBankd: |
| 253 | clnt_st_connected_bk_onenter(fi, prev_state); |
| 254 | break; |
| 255 | default: |
| 256 | OSMO_ASSERT(0); |
| 257 | } |
| 258 | } |
| 259 | |
| 260 | static void clnt_st_connected(struct osmo_fsm_inst *fi, uint32_t event, void *data) |
| 261 | { |
| 262 | struct rspro_client_conn *conn = fi->priv; |
| 263 | struct slotmaps *slotmaps = conn->srv->slotmaps; |
| 264 | const struct RsproPDU_t *rx = NULL; |
| 265 | struct slot_mapping *map, *map2; |
| 266 | |
| 267 | switch (event) { |
| 268 | case CLNTC_E_CREATE_MAP_RES: |
| 269 | rx = data; |
| 270 | slotmaps_wrlock(slotmaps); |
| 271 | /* FIXME: resolve map by pdu->tag */ |
| 272 | /* as hack use first element of conn->maps_unack */ |
| 273 | map = llist_first_entry(&conn->bank.maps_unack, struct slot_mapping, bank_list); |
| 274 | if (!map) { |
| 275 | slotmaps_unlock(slotmaps); |
| 276 | LOGPFSM(fi, "CreateMapRes but no unacknowledged map"); |
| 277 | break; |
| 278 | } |
| 279 | _slotmap_state_change(map, SLMAP_S_ACTIVE, &conn->bank.maps_active); |
| 280 | slotmaps_unlock(slotmaps); |
| 281 | break; |
| 282 | case CLNTC_E_REMOVE_MAP_RES: |
| 283 | rx = data; |
| 284 | slotmaps_wrlock(slotmaps); |
| 285 | /* FIXME: resolve map by pdu->tag */ |
| 286 | /* as hack use first element of conn->maps_deleting */ |
| 287 | map = llist_first_entry(&conn->bank.maps_deleting, struct slot_mapping, bank_list); |
| 288 | if (!map) { |
| 289 | slotmaps_unlock(slotmaps); |
| 290 | LOGPFSM(fi, "RemoveMapRes but no unacknowledged map"); |
| 291 | break; |
| 292 | } |
| 293 | slotmaps_unlock(slotmaps); |
| 294 | /* slotmap_del() will remove it from both global and bank list */ |
| 295 | slotmap_del(map->maps, map); |
| 296 | break; |
| 297 | case CLNTC_E_PUSH: |
| 298 | slotmaps_wrlock(slotmaps); |
| 299 | /* send any pending create requests */ |
| 300 | llist_for_each_entry_safe(map, map2, &conn->bank.maps_new, bank_list) { |
| 301 | RsproPDU_t *pdu = slotmap2CreateMappingReq(map); |
| 302 | client_conn_send(conn, pdu); |
| 303 | _slotmap_state_change(map, SLMAP_S_UNACKNOWLEDGED, &conn->bank.maps_unack); |
| 304 | } |
| 305 | /* send any pending delete requests */ |
| 306 | llist_for_each_entry_safe(map, map2, &conn->bank.maps_delreq, bank_list) { |
| 307 | RsproPDU_t *pdu = slotmap2RemoveMappingReq(map); |
| 308 | client_conn_send(conn, pdu); |
| 309 | _slotmap_state_change(map, SLMAP_S_DELETING, &conn->bank.maps_deleting); |
| 310 | } |
| 311 | slotmaps_unlock(slotmaps); |
| 312 | break; |
| 313 | default: |
| 314 | OSMO_ASSERT(0); |
| 315 | } |
| 316 | } |
| 317 | |
| 318 | static void clnt_allstate_action(struct osmo_fsm_inst *fi, uint32_t event, void *data) |
| 319 | { |
| 320 | struct rspro_client_conn *conn = fi->priv; |
| 321 | |
| 322 | switch (event) { |
| 323 | case CLNTC_E_TCP_DOWN: |
| 324 | osmo_fsm_inst_term(fi, OSMO_FSM_TERM_REGULAR, NULL); |
| 325 | break; |
Harald Welte | 15b75e1 | 2019-03-08 16:55:46 +0100 | [diff] [blame] | 326 | case CLNTC_E_KA_TIMEOUT: |
| 327 | osmo_fsm_inst_term(fi, OSMO_FSM_TERM_REGULAR, NULL); |
| 328 | break; |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 329 | default: |
| 330 | OSMO_ASSERT(0); |
| 331 | } |
| 332 | } |
| 333 | |
| 334 | static int server_client_fsm_timer_cb(struct osmo_fsm_inst *fi) |
| 335 | { |
| 336 | struct rspro_client_conn *conn = fi->priv; |
| 337 | |
| 338 | switch (fi->T) { |
| 339 | case 1: |
| 340 | /* No ClientConnectReq received:disconnect */ |
| 341 | return 1; /* ask core to terminate FSM */ |
| 342 | default: |
| 343 | OSMO_ASSERT(0); |
| 344 | } |
| 345 | return 0; |
| 346 | } |
| 347 | |
| 348 | static void server_client_cleanup(struct osmo_fsm_inst *fi, enum osmo_fsm_term_cause cause) |
| 349 | { |
| 350 | struct rspro_client_conn *conn = fi->priv; |
| 351 | /* this call will destroy the IPA connection, which will in turn call closed_cb() |
| 352 | * which will try to deliver a E_TCP_DOWN event. Clear conn->fi to avoid that loop */ |
| 353 | conn->fi = NULL; |
| 354 | rspro_client_conn_destroy(conn); |
| 355 | } |
| 356 | |
| 357 | static const struct osmo_fsm_state server_client_fsm_states[] = { |
| 358 | [CLNTC_ST_INIT] = { |
| 359 | .name = "INIT", |
| 360 | .in_event_mask = S(CLNTC_E_TCP_UP), |
| 361 | .out_state_mask = S(CLNTC_ST_ESTABLISHED), |
| 362 | .action = clnt_st_init, |
| 363 | }, |
| 364 | [CLNTC_ST_ESTABLISHED] = { |
| 365 | .name = "ESTABLISHED", |
| 366 | .in_event_mask = S(CLNTC_E_CLIENT_CONN) | S(CLNTC_E_BANK_CONN), |
Harald Welte | e5c7773 | 2019-03-07 23:58:24 +0100 | [diff] [blame] | 367 | .out_state_mask = S(CLNTC_ST_CONNECTED) | S(CLNTC_ST_WAIT_CONF_RES), |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 368 | .action = clnt_st_established, |
| 369 | }, |
Harald Welte | e5c7773 | 2019-03-07 23:58:24 +0100 | [diff] [blame] | 370 | [CLNTC_ST_WAIT_CONF_RES] = { |
| 371 | .name = "WAIT_CONFIG_RES", |
| 372 | .in_event_mask = S(CLNTC_E_CONFIG_CL_RES), |
| 373 | .out_state_mask = S(CLNTC_ST_CONNECTED), |
| 374 | .action = clnt_st_wait_cl_conf_res, |
| 375 | }, |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 376 | [CLNTC_ST_CONNECTED] = { |
| 377 | .name = "CONNECTED", |
| 378 | .in_event_mask = S(CLNTC_E_CREATE_MAP_RES) | S(CLNTC_E_REMOVE_MAP_RES) | |
| 379 | S(CLNTC_E_PUSH), |
| 380 | .action = clnt_st_connected, |
| 381 | .onenter = clnt_st_connected_onenter, |
| 382 | }, |
| 383 | }; |
| 384 | |
| 385 | static struct osmo_fsm remsim_server_client_fsm = { |
| 386 | .name = "SERVER_CONN", |
| 387 | .states = server_client_fsm_states, |
| 388 | .num_states = ARRAY_SIZE(server_client_fsm_states), |
| 389 | .allstate_event_mask = S(CLNTC_E_TCP_DOWN), |
| 390 | .allstate_action = clnt_allstate_action, |
| 391 | .cleanup = server_client_cleanup, |
| 392 | .timer_cb = server_client_fsm_timer_cb, |
| 393 | .log_subsys = DMAIN, |
| 394 | .event_names = server_client_event_names, |
| 395 | }; |
| 396 | |
| 397 | struct osmo_fsm_inst *server_client_fsm_alloc(void *ctx, struct rspro_client_conn *conn) |
| 398 | { |
| 399 | //const char *id = osmo_sock_get_name2(conn->peer->ofd.fd); |
| 400 | return osmo_fsm_inst_alloc(&remsim_server_client_fsm, ctx, conn, LOGL_DEBUG, NULL); |
| 401 | } |
| 402 | |
| 403 | |
| 404 | static __attribute__((constructor)) void on_dso_load(void) |
| 405 | { |
| 406 | osmo_fsm_register(&remsim_server_client_fsm); |
| 407 | } |
| 408 | |
| 409 | |
| 410 | /*********************************************************************** |
| 411 | * IPA RSPRO Server |
| 412 | ***********************************************************************/ |
| 413 | |
| 414 | struct rspro_client_conn *_bankd_conn_by_id(struct rspro_server *srv, uint16_t bank_id) |
| 415 | { |
| 416 | struct rspro_client_conn *conn; |
| 417 | llist_for_each_entry(conn, &srv->banks, list) { |
| 418 | if (conn->bank.bank_id == bank_id) |
| 419 | return conn; |
| 420 | } |
| 421 | return NULL; |
| 422 | } |
| 423 | struct rspro_client_conn *bankd_conn_by_id(struct rspro_server *srv, uint16_t bank_id) |
| 424 | { |
| 425 | struct rspro_client_conn *conn; |
| 426 | pthread_rwlock_rdlock(&srv->rwlock); |
| 427 | conn = _bankd_conn_by_id(srv, bank_id); |
| 428 | pthread_rwlock_unlock(&srv->rwlock); |
| 429 | return conn; |
| 430 | } |
| 431 | |
| 432 | static int handle_rx_rspro(struct rspro_client_conn *conn, const RsproPDU_t *pdu) |
| 433 | { |
| 434 | switch (pdu->msg.present) { |
| 435 | case RsproPDUchoice_PR_connectClientReq: |
| 436 | osmo_fsm_inst_dispatch(conn->fi, CLNTC_E_CLIENT_CONN, (void *)pdu); |
| 437 | break; |
| 438 | case RsproPDUchoice_PR_connectBankReq: |
| 439 | osmo_fsm_inst_dispatch(conn->fi, CLNTC_E_BANK_CONN, (void *)pdu); |
| 440 | break; |
| 441 | case RsproPDUchoice_PR_createMappingRes: |
| 442 | osmo_fsm_inst_dispatch(conn->fi, CLNTC_E_CREATE_MAP_RES, (void *)pdu); |
| 443 | break; |
| 444 | case RsproPDUchoice_PR_removeMappingRes: |
| 445 | osmo_fsm_inst_dispatch(conn->fi, CLNTC_E_REMOVE_MAP_RES, (void *)pdu); |
| 446 | break; |
Harald Welte | e5c7773 | 2019-03-07 23:58:24 +0100 | [diff] [blame] | 447 | case RsproPDUchoice_PR_configClientRes: |
| 448 | osmo_fsm_inst_dispatch(conn->fi, CLNTC_E_CONFIG_CL_RES, (void *)pdu); |
| 449 | break; |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 450 | default: |
| 451 | LOGPFSML(conn->fi, LOGL_ERROR, "Received unknown/unimplemented RSPRO msg_type %d\n", |
| 452 | pdu->msg.present); |
| 453 | return -1; |
| 454 | } |
| 455 | return 0; |
| 456 | } |
| 457 | |
| 458 | /* data was received from one of the client connections to the RSPRO socket */ |
| 459 | static int sock_read_cb(struct ipa_server_conn *peer, struct msgb *msg) |
| 460 | { |
| 461 | struct ipaccess_head *hh = (struct ipaccess_head *) msg->data; |
| 462 | struct ipaccess_head_ext *he = (struct ipaccess_head_ext *) msgb_l2(msg); |
| 463 | struct rspro_client_conn *conn = peer->data; |
| 464 | RsproPDU_t *pdu; |
| 465 | int rc; |
| 466 | |
| 467 | if (msgb_length(msg) < sizeof(*hh)) |
| 468 | goto invalid; |
| 469 | msg->l2h = &hh->data[0]; |
Harald Welte | 7bfcc65 | 2019-03-08 16:55:01 +0100 | [diff] [blame] | 470 | switch (hh->proto) { |
| 471 | case IPAC_PROTO_IPACCESS: |
| 472 | rc = ipa_server_conn_ccm(peer, msg); |
Harald Welte | 15b75e1 | 2019-03-08 16:55:46 +0100 | [diff] [blame] | 473 | if (rc < 0) |
| 474 | break; |
| 475 | switch (hh->data[0]) { |
| 476 | case IPAC_MSGT_PONG: |
| 477 | ipa_keepalive_fsm_pong_received(conn->keepalive_fi); |
| 478 | rc = 0; |
| 479 | break; |
| 480 | default: |
| 481 | break; |
| 482 | } |
Harald Welte | 7bfcc65 | 2019-03-08 16:55:01 +0100 | [diff] [blame] | 483 | break; |
| 484 | case IPAC_PROTO_OSMO: |
| 485 | if (!he || msgb_l2len(msg)< sizeof(*he)) |
| 486 | goto invalid; |
| 487 | msg->l2h = &he->data[0]; |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 488 | |
Harald Welte | 7bfcc65 | 2019-03-08 16:55:01 +0100 | [diff] [blame] | 489 | switch (he->proto) { |
| 490 | case IPAC_PROTO_EXT_RSPRO: |
| 491 | pdu = rspro_dec_msg(msg); |
| 492 | if (!pdu) |
| 493 | goto invalid; |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 494 | |
Harald Welte | 7bfcc65 | 2019-03-08 16:55:01 +0100 | [diff] [blame] | 495 | rc = handle_rx_rspro(conn, pdu); |
| 496 | ASN_STRUCT_FREE(asn_DEF_RsproPDU, pdu); |
| 497 | break; |
| 498 | default: |
| 499 | goto invalid; |
| 500 | } |
| 501 | break; |
| 502 | default: |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 503 | goto invalid; |
Harald Welte | 7bfcc65 | 2019-03-08 16:55:01 +0100 | [diff] [blame] | 504 | } |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 505 | return rc; |
| 506 | |
| 507 | invalid: |
| 508 | msgb_free(msg); |
| 509 | return -1; |
| 510 | } |
| 511 | |
| 512 | static int sock_closed_cb(struct ipa_server_conn *peer) |
| 513 | { |
| 514 | struct rspro_client_conn *conn = peer->data; |
| 515 | if (conn->fi) |
| 516 | osmo_fsm_inst_dispatch(conn->fi, CLNTC_E_TCP_DOWN, NULL); |
| 517 | /* FIXME: who cleans up conn? */ |
| 518 | /* ipa server code relases 'peer' just after this */ |
| 519 | return 0; |
| 520 | } |
| 521 | |
Harald Welte | 15b75e1 | 2019-03-08 16:55:46 +0100 | [diff] [blame] | 522 | static const struct ipa_keepalive_params ka_params = { |
| 523 | .interval = 30, |
| 524 | .wait_for_resp = 10, |
| 525 | }; |
| 526 | |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 527 | /* a new TCP connection was accepted on the RSPRO server socket */ |
| 528 | static int accept_cb(struct ipa_server_link *link, int fd) |
| 529 | { |
| 530 | struct rspro_server *srv = link->data; |
| 531 | struct rspro_client_conn *conn; |
| 532 | |
| 533 | conn = talloc_zero(srv, struct rspro_client_conn); |
| 534 | OSMO_ASSERT(conn); |
| 535 | |
| 536 | conn->srv = srv; |
| 537 | /* don't allocate peer under 'conn', as it must survive 'conn' during teardown */ |
| 538 | conn->peer = ipa_server_conn_create(link, link, fd, sock_read_cb, sock_closed_cb, conn); |
| 539 | if (!conn->peer) |
| 540 | goto out_err; |
| 541 | |
| 542 | /* don't allocate 'fi' as slave from 'conn', as 'fi' needs to survive 'conn' during |
| 543 | * teardown */ |
| 544 | conn->fi = server_client_fsm_alloc(srv, conn); |
| 545 | if (!conn->fi) |
| 546 | goto out_err_conn; |
| 547 | |
Harald Welte | 15b75e1 | 2019-03-08 16:55:46 +0100 | [diff] [blame] | 548 | /* use ipa_keepalive_fsm to periodically send an IPA_PING and expect a PONG in response */ |
| 549 | conn->keepalive_fi = ipa_server_conn_alloc_keepalive_fsm(conn->peer, &ka_params, NULL); |
| 550 | if (!conn->keepalive_fi) |
| 551 | goto out_err_fi; |
| 552 | /* ensure parent is notified once keepalive FSM instance is dying */ |
| 553 | osmo_fsm_inst_change_parent(conn->keepalive_fi, conn->fi, CLNTC_E_KA_TIMEOUT); |
| 554 | ipa_keepalive_fsm_start(conn->keepalive_fi); |
| 555 | |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 556 | INIT_LLIST_HEAD(&conn->bank.maps_new); |
| 557 | INIT_LLIST_HEAD(&conn->bank.maps_unack); |
| 558 | INIT_LLIST_HEAD(&conn->bank.maps_active); |
| 559 | INIT_LLIST_HEAD(&conn->bank.maps_delreq); |
| 560 | INIT_LLIST_HEAD(&conn->bank.maps_deleting); |
| 561 | |
| 562 | pthread_rwlock_wrlock(&conn->srv->rwlock); |
| 563 | llist_add_tail(&conn->list, &srv->connections); |
| 564 | pthread_rwlock_unlock(&conn->srv->rwlock); |
| 565 | |
| 566 | osmo_fsm_inst_dispatch(conn->fi, CLNTC_E_TCP_UP, NULL); |
| 567 | return 0; |
| 568 | |
Harald Welte | 15b75e1 | 2019-03-08 16:55:46 +0100 | [diff] [blame] | 569 | out_err_fi: |
| 570 | osmo_fsm_inst_term(conn->fi, OSMO_FSM_TERM_ERROR, NULL); |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 571 | out_err_conn: |
| 572 | ipa_server_conn_destroy(conn->peer); |
| 573 | /* the above will free 'conn' down the chain */ |
| 574 | return -1; |
| 575 | out_err: |
| 576 | talloc_free(conn); |
| 577 | return -1; |
| 578 | } |
| 579 | |
| 580 | /* call-back if we were triggered by a rest_api thread */ |
| 581 | int event_fd_cb(struct osmo_fd *ofd, unsigned int what) |
| 582 | { |
| 583 | struct rspro_server *srv = ofd->data; |
| 584 | struct rspro_client_conn *conn; |
| 585 | bool non_empty_new, non_empty_del; |
| 586 | uint64_t value; |
| 587 | int rc; |
| 588 | |
| 589 | /* read from the socket to "confirm" the event and make it non-readable again */ |
| 590 | rc = read(ofd->fd, &value, 8); |
| 591 | if (rc < 8) { |
| 592 | fprintf(stderr, "Error reading eventfd: %d\n", rc); |
| 593 | return rc; |
| 594 | } |
| 595 | |
| 596 | printf("rspro_server: Event FD arrived, checking for any pending work\n"); |
| 597 | |
| 598 | pthread_rwlock_rdlock(&srv->rwlock); |
| 599 | llist_for_each_entry(conn, &srv->banks, list) { |
| 600 | slotmaps_rdlock(srv->slotmaps); |
| 601 | non_empty_new = llist_empty(&conn->bank.maps_new); |
| 602 | non_empty_del = llist_empty(&conn->bank.maps_delreq); |
| 603 | slotmaps_unlock(srv->slotmaps); |
| 604 | |
| 605 | /* trigger FSM to send any pending new/deleted maps */ |
| 606 | if (non_empty_new || non_empty_del) |
| 607 | osmo_fsm_inst_dispatch(conn->fi, CLNTC_E_PUSH, NULL); |
| 608 | } |
| 609 | pthread_rwlock_unlock(&srv->rwlock); |
| 610 | |
| 611 | return 0; |
| 612 | } |
| 613 | |
| 614 | /* unlink all slotmaps from any of the lists of this conn->bank.maps_* */ |
| 615 | static void _unlink_all_slotmaps(struct rspro_client_conn *conn) |
| 616 | { |
| 617 | struct slot_mapping *smap, *smap2; |
| 618 | |
| 619 | llist_for_each_entry_safe(smap, smap2, &conn->bank.maps_new, bank_list) { |
| 620 | /* unlink from list and keep in state NEW */ |
| 621 | _slotmap_state_change(smap, SLMAP_S_NEW, NULL); |
| 622 | } |
| 623 | llist_for_each_entry_safe(smap, smap2, &conn->bank.maps_unack, bank_list) { |
| 624 | /* unlink from list and change to state NEW */ |
| 625 | _slotmap_state_change(smap, SLMAP_S_NEW, NULL); |
| 626 | } |
| 627 | llist_for_each_entry_safe(smap, smap2, &conn->bank.maps_active, bank_list) { |
| 628 | /* unlink from list and change to state NEW */ |
| 629 | _slotmap_state_change(smap, SLMAP_S_NEW, NULL); |
| 630 | } |
| 631 | llist_for_each_entry_safe(smap, smap2, &conn->bank.maps_delreq, bank_list) { |
| 632 | /* unlink from list and delete */ |
| 633 | _slotmap_del(smap->maps, smap); |
| 634 | } |
| 635 | llist_for_each_entry_safe(smap, smap2, &conn->bank.maps_deleting, bank_list) { |
| 636 | /* unlink from list and delete */ |
| 637 | _slotmap_del(smap->maps, smap); |
| 638 | } |
| 639 | } |
| 640 | |
| 641 | /* only to be used by the FSM cleanup. */ |
| 642 | static void rspro_client_conn_destroy(struct rspro_client_conn *conn) |
| 643 | { |
| 644 | /* this will internally call closed_cb() which will dispatch a TCP_DOWN event */ |
| 645 | ipa_server_conn_destroy(conn->peer); |
| 646 | conn->peer = NULL; |
| 647 | |
| 648 | /* ensure all slotmaps are unlinked + returned to NEW or deleted */ |
| 649 | slotmaps_wrlock(conn->srv->slotmaps); |
| 650 | _unlink_all_slotmaps(conn); |
| 651 | slotmaps_unlock(conn->srv->slotmaps); |
| 652 | |
| 653 | pthread_rwlock_wrlock(&conn->srv->rwlock); |
| 654 | llist_del(&conn->list); |
| 655 | pthread_rwlock_unlock(&conn->srv->rwlock); |
| 656 | |
| 657 | talloc_free(conn); |
| 658 | } |
| 659 | |
| 660 | |
| 661 | struct rspro_server *rspro_server_create(void *ctx, const char *host, uint16_t port) |
| 662 | |
| 663 | { |
| 664 | struct rspro_server *srv = talloc_zero(ctx, struct rspro_server); |
| 665 | OSMO_ASSERT(srv); |
| 666 | |
| 667 | pthread_rwlock_init(&srv->rwlock, NULL); |
| 668 | pthread_rwlock_wrlock(&srv->rwlock); |
| 669 | INIT_LLIST_HEAD(&srv->connections); |
| 670 | INIT_LLIST_HEAD(&srv->clients); |
| 671 | INIT_LLIST_HEAD(&srv->banks); |
| 672 | pthread_rwlock_unlock(&srv->rwlock); |
| 673 | |
| 674 | srv->link = ipa_server_link_create(ctx, NULL, host, port, accept_cb, srv); |
| 675 | ipa_server_link_open(srv->link); |
| 676 | |
| 677 | return srv; |
| 678 | } |
| 679 | |
| 680 | void rspro_server_destroy(struct rspro_server *srv) |
| 681 | { |
| 682 | /* FIXME: clear all lists */ |
| 683 | |
| 684 | ipa_server_link_destroy(srv->link); |
| 685 | srv->link = NULL; |
| 686 | talloc_free(srv); |
| 687 | } |