Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 1 | #include <stdint.h> |
| 2 | #include <string.h> |
| 3 | #include <errno.h> |
| 4 | |
| 5 | #include <talloc.h> |
| 6 | |
| 7 | #include <osmocom/core/logging.h> |
| 8 | #include <osmocom/core/utils.h> |
| 9 | #include <osmocom/core/msgb.h> |
| 10 | #include <osmocom/core/fsm.h> |
| 11 | |
| 12 | #include <osmocom/abis/ipa.h> |
| 13 | #include <osmocom/gsm/protocol/ipaccess.h> |
| 14 | |
| 15 | #include "client.h" |
| 16 | #include "rspro_util.h" |
| 17 | |
| 18 | #define S(x) (1 << (x)) |
| 19 | |
Harald Welte | 7f0e82f | 2018-10-14 20:07:59 +0200 | [diff] [blame] | 20 | static void push_and_send(struct ipa_client_conn *ipa, struct msgb *msg_tx) |
| 21 | { |
| 22 | ipa_prepend_header_ext(msg_tx, IPAC_PROTO_EXT_RSPRO); |
| 23 | ipa_msg_push_header(msg_tx, IPAC_PROTO_OSMO); |
| 24 | ipa_client_conn_send(ipa, msg_tx); |
| 25 | /* msg_tx is now queued and will be freed. */ |
| 26 | } |
| 27 | |
| 28 | void ipa_client_conn_send_rspro(struct ipa_client_conn *ipa, RsproPDU_t *rspro) |
| 29 | { |
| 30 | struct msgb *msg = rspro_enc_msg(rspro); |
| 31 | OSMO_ASSERT(msg); |
| 32 | push_and_send(ipa, msg); |
| 33 | } |
| 34 | |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 35 | static void bankd_updown_cb(struct ipa_client_conn *conn, int up) |
| 36 | { |
| 37 | struct bankd_client *bc = conn->data; |
| 38 | |
| 39 | printf("RSPRO link to %s:%d %s\n", conn->addr, conn->port, up ? "UP" : "DOWN"); |
| 40 | |
| 41 | osmo_fsm_inst_dispatch(bc->bankd_fi, up ? BDC_E_TCP_UP: BDC_E_TCP_DOWN, 0); |
| 42 | } |
| 43 | |
| 44 | /*********************************************************************** |
| 45 | * bankd connection FSM |
| 46 | ***********************************************************************/ |
| 47 | |
| 48 | enum bankd_conn_fsm_state { |
| 49 | /* waiting for initial connectiong to remsim-bankd */ |
| 50 | BDC_ST_INIT, |
| 51 | /* bankd connection established, waiting for ClientConnectRes */ |
| 52 | BDC_ST_ESTABLISHED, |
| 53 | /* bankd connection etsablished, ClientConnect succeeded */ |
| 54 | BDC_ST_CONNECTED, |
| 55 | /* connection lost, we're waiting for a re-establish */ |
| 56 | BDC_ST_REESTABLISH, |
| 57 | }; |
| 58 | |
| 59 | static const struct value_string remsim_client_bankd_fsm_event_names[] = { |
Harald Welte | e56f2b9 | 2019-03-02 17:02:13 +0100 | [diff] [blame] | 60 | OSMO_VALUE_STRING(BDC_E_ESTABLISH), |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 61 | OSMO_VALUE_STRING(BDC_E_TCP_UP), |
| 62 | OSMO_VALUE_STRING(BDC_E_TCP_DOWN), |
| 63 | OSMO_VALUE_STRING(BDC_E_CLIENT_CONN_RES), |
| 64 | { 0, NULL } |
| 65 | }; |
| 66 | |
| 67 | #define T1_WAIT_CLIENT_CONN_RES 10 |
| 68 | #define T2_RECONNECT 10 |
| 69 | |
| 70 | |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 71 | static void bdc_st_init(struct osmo_fsm_inst *fi, uint32_t event, void *data) |
| 72 | { |
| 73 | switch (event) { |
Harald Welte | e56f2b9 | 2019-03-02 17:02:13 +0100 | [diff] [blame] | 74 | case BDC_E_ESTABLISH: |
Harald Welte | 52cc7db | 2018-09-24 11:51:51 +0200 | [diff] [blame] | 75 | osmo_fsm_inst_state_chg(fi, BDC_ST_REESTABLISH, T2_RECONNECT, 2); |
| 76 | break; |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 77 | default: |
| 78 | OSMO_ASSERT(0); |
| 79 | } |
| 80 | } |
| 81 | |
| 82 | static void bdc_st_established_onenter(struct osmo_fsm_inst *fi, uint32_t prev_state) |
| 83 | { |
| 84 | struct bankd_client *bc = (struct bankd_client *) fi->priv; |
| 85 | RsproPDU_t *pdu; |
| 86 | |
| 87 | /* FIXME: Send ClientConnReq */ |
Harald Welte | ec628e9 | 2019-03-08 22:18:31 +0100 | [diff] [blame] | 88 | pdu = rspro_gen_ConnectClientReq(&bc->srv_conn.own_comp_id, bc->srv_conn.clslot); |
Harald Welte | f29e0d0 | 2018-08-24 21:42:22 +0200 | [diff] [blame] | 89 | ipa_client_conn_send_rspro(bc->bankd_conn, pdu); |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 90 | } |
| 91 | |
| 92 | static void bdc_st_established(struct osmo_fsm_inst *fi, uint32_t event, void *data) |
| 93 | { |
| 94 | switch (event) { |
| 95 | case BDC_E_TCP_DOWN: |
| 96 | osmo_fsm_inst_state_chg(fi, BDC_ST_REESTABLISH, T2_RECONNECT, 2); |
| 97 | break; |
| 98 | case BDC_E_CLIENT_CONN_RES: |
| 99 | /* somehow notify the main code? */ |
| 100 | osmo_fsm_inst_state_chg(fi, BDC_ST_CONNECTED, 0, 0); |
| 101 | break; |
| 102 | default: |
| 103 | OSMO_ASSERT(0); |
| 104 | } |
| 105 | } |
| 106 | |
| 107 | static void bdc_st_connected(struct osmo_fsm_inst *fi, uint32_t event, void *data) |
| 108 | { |
| 109 | switch (event) { |
| 110 | case BDC_E_TCP_DOWN: |
| 111 | osmo_fsm_inst_state_chg(fi, BDC_ST_REESTABLISH, T2_RECONNECT, 2); |
| 112 | break; |
| 113 | default: |
| 114 | OSMO_ASSERT(0); |
| 115 | } |
| 116 | } |
| 117 | |
| 118 | static void bdc_st_reestablish_onenter(struct osmo_fsm_inst *fi, uint32_t prev_state) |
| 119 | { |
| 120 | struct bankd_client *bc = (struct bankd_client *) fi->priv; |
| 121 | int rc; |
| 122 | |
Harald Welte | e56f2b9 | 2019-03-02 17:02:13 +0100 | [diff] [blame] | 123 | /* re-create bankd_conn */ |
| 124 | if (bc->bankd_conn) { |
| 125 | LOGPFSML(fi, LOGL_INFO, "Destroying existing connection to bankd\n"); |
| 126 | ipa_client_conn_destroy(bc->bankd_conn); |
| 127 | bc->bankd_conn = NULL; |
| 128 | } |
| 129 | LOGPFSML(fi, LOGL_INFO, "Creating TCP connection to bankd at %s:%u\n", |
| 130 | bc->bankd_host, bc->bankd_port); |
| 131 | bc->bankd_conn = ipa_client_conn_create(bc, NULL, 0, bc->bankd_host, bc->bankd_port, |
| 132 | bankd_updown_cb, bankd_read_cb, NULL, bc); |
| 133 | if (!bc->bankd_conn) { |
| 134 | fprintf(stderr, "Unable to create socket: %s\n", strerror(errno)); |
| 135 | exit(1); |
| 136 | } |
| 137 | |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 138 | /* Attempt to connect TCP socket */ |
| 139 | rc = ipa_client_conn_open(bc->bankd_conn); |
| 140 | if (rc < 0) { |
| 141 | fprintf(stderr, "Unable to connect RSPRO to %s:%d - %s\n", |
| 142 | bc->bankd_conn->addr, bc->bankd_conn->port, strerror(errno)); |
| 143 | /* FIXME: retry? Timer? Abort? */ |
| 144 | OSMO_ASSERT(0); |
| 145 | } |
| 146 | } |
| 147 | |
| 148 | static void bdc_st_reestablish(struct osmo_fsm_inst *fi, uint32_t event, void *data) |
| 149 | { |
| 150 | switch (event) { |
| 151 | case BDC_E_TCP_UP: |
| 152 | osmo_fsm_inst_state_chg(fi, BDC_ST_ESTABLISHED, T1_WAIT_CLIENT_CONN_RES, 1); |
| 153 | break; |
Harald Welte | 52cc7db | 2018-09-24 11:51:51 +0200 | [diff] [blame] | 154 | case BDC_E_TCP_DOWN: |
| 155 | /* wait for normal T2 timeout */ |
| 156 | break; |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 157 | default: |
| 158 | OSMO_ASSERT(0); |
| 159 | } |
| 160 | } |
| 161 | |
Harald Welte | e56f2b9 | 2019-03-02 17:02:13 +0100 | [diff] [blame] | 162 | static void bdc_allstate_action(struct osmo_fsm_inst *fi, uint32_t event, void *data) |
| 163 | { |
| 164 | switch (event) { |
| 165 | case BDC_ST_REESTABLISH: |
| 166 | osmo_fsm_inst_state_chg(fi, BDC_ST_REESTABLISH, T2_RECONNECT, 2); |
| 167 | break; |
| 168 | default: |
| 169 | OSMO_ASSERT(0); |
| 170 | } |
| 171 | } |
| 172 | |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 173 | static int remsim_client_bankd_fsm_timer_cb(struct osmo_fsm_inst *fi) |
| 174 | { |
Harald Welte | 52cc7db | 2018-09-24 11:51:51 +0200 | [diff] [blame] | 175 | switch (fi->T) { |
| 176 | case 2: |
Harald Welte | e56f2b9 | 2019-03-02 17:02:13 +0100 | [diff] [blame] | 177 | /* TCP reconnect failed: retry */ |
Harald Welte | 52cc7db | 2018-09-24 11:51:51 +0200 | [diff] [blame] | 178 | osmo_fsm_inst_state_chg(fi, BDC_ST_REESTABLISH, T2_RECONNECT, 2); |
| 179 | break; |
| 180 | case 1: |
Harald Welte | e56f2b9 | 2019-03-02 17:02:13 +0100 | [diff] [blame] | 181 | /* no ClientConnectRes received: disconnect + reconnect */ |
| 182 | osmo_fsm_inst_state_chg(fi, BDC_ST_REESTABLISH, T2_RECONNECT, 2); |
Harald Welte | 52cc7db | 2018-09-24 11:51:51 +0200 | [diff] [blame] | 183 | break; |
| 184 | default: |
| 185 | OSMO_ASSERT(0); |
| 186 | } |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 187 | return 0; |
| 188 | } |
| 189 | |
| 190 | static const struct osmo_fsm_state bankd_conn_fsm_states[] = { |
| 191 | [BDC_ST_INIT] = { |
| 192 | .name = "INIT", |
Harald Welte | e56f2b9 | 2019-03-02 17:02:13 +0100 | [diff] [blame] | 193 | .in_event_mask = 0, /* S(BDC_E_ESTABLISH) via allstate */ |
| 194 | .out_state_mask = S(BDC_ST_REESTABLISH), |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 195 | .action = bdc_st_init, |
| 196 | }, |
| 197 | [BDC_ST_ESTABLISHED] = { |
| 198 | .name = "ESTABLISHED", |
| 199 | .in_event_mask = S(BDC_E_TCP_DOWN) | S(BDC_E_CLIENT_CONN_RES), |
| 200 | .out_state_mask = S(BDC_ST_CONNECTED) | S(BDC_ST_REESTABLISH), |
| 201 | .action = bdc_st_established, |
| 202 | .onenter = bdc_st_established_onenter, |
| 203 | }, |
| 204 | [BDC_ST_CONNECTED] = { |
| 205 | .name = "CONNECTED", |
| 206 | .in_event_mask = S(BDC_E_TCP_DOWN), |
| 207 | .out_state_mask = S(BDC_ST_REESTABLISH), |
| 208 | .action = bdc_st_connected, |
| 209 | }, |
| 210 | [BDC_ST_REESTABLISH] = { |
| 211 | .name = "REESTABLISH", |
Harald Welte | 52cc7db | 2018-09-24 11:51:51 +0200 | [diff] [blame] | 212 | .in_event_mask = S(BDC_E_TCP_UP) | S(BDC_E_TCP_DOWN), |
| 213 | .out_state_mask = S(BDC_ST_ESTABLISHED) | S(BDC_ST_REESTABLISH), |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 214 | .action = bdc_st_reestablish, |
| 215 | .onenter = bdc_st_reestablish_onenter, |
| 216 | }, |
| 217 | }; |
| 218 | |
| 219 | struct osmo_fsm remsim_client_bankd_fsm = { |
| 220 | .name = "BANKD_CONN", |
| 221 | .states = bankd_conn_fsm_states, |
| 222 | .num_states = ARRAY_SIZE(bankd_conn_fsm_states), |
Harald Welte | e56f2b9 | 2019-03-02 17:02:13 +0100 | [diff] [blame] | 223 | .allstate_event_mask = S(BDC_E_ESTABLISH), |
| 224 | .allstate_action = bdc_allstate_action, |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 225 | .timer_cb = remsim_client_bankd_fsm_timer_cb, |
| 226 | .log_subsys = DMAIN, |
| 227 | .event_names = remsim_client_bankd_fsm_event_names, |
| 228 | }; |
| 229 | |
| 230 | int bankd_conn_fsm_alloc(struct bankd_client *bc) |
| 231 | { |
| 232 | struct osmo_fsm_inst *fi; |
| 233 | |
| 234 | fi = osmo_fsm_inst_alloc(&remsim_client_bankd_fsm, bc, bc, LOGL_DEBUG, "bankd"); |
| 235 | if (!fi) |
| 236 | return -1; |
| 237 | |
| 238 | bc->bankd_fi = fi; |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 239 | return 0; |
| 240 | } |
| 241 | |
| 242 | /*********************************************************************** |
| 243 | * server connection FSM |
| 244 | ***********************************************************************/ |
| 245 | |
| 246 | enum server_conn_fsm_state { |
| 247 | /* waiting for initial connectiong to remsim-server */ |
| 248 | SRVC_ST_INIT, |
| 249 | /* server connection established, waiting for ClientConnectRes */ |
| 250 | SRVC_ST_ESTABLISHED, |
| 251 | /* server connection etsablished, ClientConnect succeeded */ |
| 252 | SRVC_ST_CONNECTED, |
| 253 | /* connection lost, we're waiting for a re-establish */ |
| 254 | SRVC_ST_REESTABLISH, |
| 255 | }; |
| 256 | |
| 257 | static const struct value_string server_conn_fsm_event_names[] = { |
| 258 | OSMO_VALUE_STRING(SRVC_E_TCP_UP), |
| 259 | OSMO_VALUE_STRING(SRVC_E_TCP_DOWN), |
Harald Welte | 03b2411 | 2019-03-08 19:43:02 +0100 | [diff] [blame] | 260 | OSMO_VALUE_STRING(SRVC_E_KA_TIMEOUT), |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 261 | OSMO_VALUE_STRING(SRVC_E_CLIENT_CONN_RES), |
| 262 | { 0, NULL } |
| 263 | }; |
| 264 | |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 265 | static void srvc_updown_cb(struct ipa_client_conn *conn, int up) |
| 266 | { |
| 267 | struct rspro_server_conn *srvc = conn->data; |
| 268 | |
| 269 | printf("RSPRO link to %s:%d %s\n", conn->addr, conn->port, up ? "UP" : "DOWN"); |
| 270 | |
| 271 | osmo_fsm_inst_dispatch(srvc->fi, up ? SRVC_E_TCP_UP: SRVC_E_TCP_DOWN, 0); |
| 272 | } |
| 273 | |
| 274 | static int srvc_read_cb(struct ipa_client_conn *conn, struct msgb *msg) |
| 275 | { |
| 276 | struct ipaccess_head *hh = (struct ipaccess_head *) msg->data; |
| 277 | struct ipaccess_head_ext *he = (struct ipaccess_head_ext *) msgb_l2(msg); |
| 278 | struct rspro_server_conn *srvc = conn->data; |
Harald Welte | f9995a3 | 2018-10-14 20:40:05 +0200 | [diff] [blame] | 279 | RsproPDU_t *pdu; |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 280 | int rc; |
| 281 | |
| 282 | if (msgb_length(msg) < sizeof(*hh)) |
| 283 | goto invalid; |
| 284 | msg->l2h = &hh->data[0]; |
Harald Welte | 1a17104 | 2019-03-08 19:18:52 +0100 | [diff] [blame] | 285 | switch (hh->proto) { |
Harald Welte | 03b2411 | 2019-03-08 19:43:02 +0100 | [diff] [blame] | 286 | case IPAC_PROTO_IPACCESS: |
| 287 | rc = ipaccess_bts_handle_ccm(srvc->conn, &srvc->ipa_dev, msg); |
| 288 | if (rc < 0) |
| 289 | break; |
| 290 | switch (hh->data[0]) { |
| 291 | case IPAC_MSGT_PONG: |
| 292 | ipa_keepalive_fsm_pong_received(srvc->keepalive_fi); |
| 293 | rc = 0; |
| 294 | break; |
| 295 | default: |
| 296 | break; |
| 297 | } |
| 298 | break; |
Harald Welte | 1a17104 | 2019-03-08 19:18:52 +0100 | [diff] [blame] | 299 | case IPAC_PROTO_OSMO: |
| 300 | if (!he || msgb_l2len(msg) < sizeof(*he)) |
| 301 | goto invalid; |
| 302 | msg->l2h = &he->data[0]; |
| 303 | switch (he->proto) { |
| 304 | case IPAC_PROTO_EXT_RSPRO: |
| 305 | printf("Received RSPRO %s\n", msgb_hexdump(msg)); |
| 306 | pdu = rspro_dec_msg(msg); |
| 307 | if (!pdu) |
| 308 | goto invalid; |
| 309 | rc = srvc->handle_rx(srvc, pdu); |
| 310 | ASN_STRUCT_FREE(asn_DEF_RsproPDU, pdu); |
| 311 | break; |
| 312 | default: |
| 313 | goto invalid; |
| 314 | } |
| 315 | break; |
| 316 | default: |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 317 | goto invalid; |
Harald Welte | 1a17104 | 2019-03-08 19:18:52 +0100 | [diff] [blame] | 318 | } |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 319 | |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 320 | return rc; |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 321 | |
| 322 | invalid: |
| 323 | msgb_free(msg); |
| 324 | return -1; |
| 325 | } |
| 326 | |
Harald Welte | 03b2411 | 2019-03-08 19:43:02 +0100 | [diff] [blame] | 327 | static const struct ipa_keepalive_params ka_params = { |
| 328 | .interval = 30, |
| 329 | .wait_for_resp = 10, |
| 330 | }; |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 331 | |
| 332 | static void srvc_st_init_onenter(struct osmo_fsm_inst *fi, uint32_t prev_state) |
| 333 | { |
| 334 | struct rspro_server_conn *srvc = (struct rspro_server_conn *) fi->priv; |
| 335 | int rc; |
| 336 | |
Harald Welte | 098ef87 | 2018-10-14 20:08:50 +0200 | [diff] [blame] | 337 | srvc->conn = ipa_client_conn_create(fi, NULL, 0, srvc->server_host, srvc->server_port, |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 338 | srvc_updown_cb, srvc_read_cb, NULL, srvc); |
| 339 | if (!srvc->conn) { |
Harald Welte | 03b2411 | 2019-03-08 19:43:02 +0100 | [diff] [blame] | 340 | LOGPFSM(fi, "Unable to create socket: %s\n", strerror(errno)); |
| 341 | goto out_fi; |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 342 | } |
Harald Welte | 03b2411 | 2019-03-08 19:43:02 +0100 | [diff] [blame] | 343 | |
| 344 | srvc->keepalive_fi = ipa_client_conn_alloc_keepalive_fsm(srvc->conn, &ka_params, fi->id); |
| 345 | if (!srvc->keepalive_fi) { |
| 346 | LOGPFSM(fi, "Unable to create keepalive FSM\n"); |
| 347 | goto out_conn; |
| 348 | } |
| 349 | /* ensure parent is notified once keepalive FSM instance is dying */ |
| 350 | osmo_fsm_inst_change_parent(srvc->keepalive_fi, srvc->fi, SRVC_E_KA_TIMEOUT); |
| 351 | |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 352 | /* Attempt to connect TCP socket */ |
| 353 | rc = ipa_client_conn_open(srvc->conn); |
| 354 | if (rc < 0) { |
| 355 | fprintf(stderr, "Unable to connect: %s\n", strerror(errno)); |
Harald Welte | 03b2411 | 2019-03-08 19:43:02 +0100 | [diff] [blame] | 356 | goto out_ka; |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 357 | } |
Harald Welte | 03b2411 | 2019-03-08 19:43:02 +0100 | [diff] [blame] | 358 | |
| 359 | return; |
| 360 | |
| 361 | out_ka: |
| 362 | osmo_fsm_inst_term(srvc->keepalive_fi, OSMO_FSM_TERM_ERROR, NULL); |
| 363 | out_conn: |
| 364 | ipa_client_conn_destroy(srvc->conn); |
| 365 | out_fi: |
| 366 | osmo_fsm_inst_term(fi, OSMO_FSM_TERM_ERROR, NULL); |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 367 | } |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 368 | |
| 369 | static void srvc_st_init(struct osmo_fsm_inst *fi, uint32_t event, void *data) |
| 370 | { |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 371 | switch (event) { |
| 372 | case SRVC_E_TCP_UP: |
| 373 | osmo_fsm_inst_state_chg(fi, SRVC_ST_ESTABLISHED, T1_WAIT_CLIENT_CONN_RES, 1); |
| 374 | break; |
Harald Welte | 52cc7db | 2018-09-24 11:51:51 +0200 | [diff] [blame] | 375 | case SRVC_E_TCP_DOWN: |
| 376 | osmo_fsm_inst_state_chg(fi, SRVC_ST_REESTABLISH, T2_RECONNECT, 2); |
| 377 | break; |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 378 | default: |
| 379 | OSMO_ASSERT(0); |
| 380 | } |
| 381 | } |
| 382 | |
| 383 | static void srvc_st_established_onenter(struct osmo_fsm_inst *fi, uint32_t prev_state) |
| 384 | { |
| 385 | struct rspro_server_conn *srvc = (struct rspro_server_conn *) fi->priv; |
| 386 | RsproPDU_t *pdu; |
| 387 | |
Harald Welte | 03b2411 | 2019-03-08 19:43:02 +0100 | [diff] [blame] | 388 | ipa_keepalive_fsm_start(srvc->keepalive_fi); |
| 389 | |
Harald Welte | ec628e9 | 2019-03-08 22:18:31 +0100 | [diff] [blame] | 390 | pdu = rspro_gen_ConnectClientReq(&srvc->own_comp_id, srvc->clslot); |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 391 | ipa_client_conn_send_rspro(srvc->conn, pdu); |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 392 | } |
| 393 | |
| 394 | static void srvc_st_established(struct osmo_fsm_inst *fi, uint32_t event, void *data) |
| 395 | { |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 396 | switch (event) { |
| 397 | case SRVC_E_TCP_DOWN: |
Harald Welte | 03b2411 | 2019-03-08 19:43:02 +0100 | [diff] [blame] | 398 | case SRVC_E_KA_TIMEOUT: |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 399 | osmo_fsm_inst_state_chg(fi, SRVC_ST_REESTABLISH, T2_RECONNECT, 2); |
| 400 | break; |
| 401 | case SRVC_E_CLIENT_CONN_RES: |
| 402 | /* somehow notify the main code? */ |
| 403 | osmo_fsm_inst_state_chg(fi, SRVC_ST_CONNECTED, 0, 0); |
| 404 | break; |
| 405 | default: |
| 406 | OSMO_ASSERT(0); |
| 407 | } |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 408 | } |
| 409 | |
| 410 | static void srvc_st_connected(struct osmo_fsm_inst *fi, uint32_t event, void *data) |
| 411 | { |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 412 | switch (event) { |
| 413 | case SRVC_E_TCP_DOWN: |
Harald Welte | 03b2411 | 2019-03-08 19:43:02 +0100 | [diff] [blame] | 414 | case SRVC_E_KA_TIMEOUT: |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 415 | osmo_fsm_inst_state_chg(fi, SRVC_ST_REESTABLISH, T2_RECONNECT, 2); |
| 416 | break; |
| 417 | default: |
| 418 | OSMO_ASSERT(0); |
| 419 | } |
| 420 | } |
| 421 | |
| 422 | static void srvc_st_reestablish_onenter(struct osmo_fsm_inst *fi, uint32_t prev_state) |
| 423 | { |
| 424 | struct rspro_server_conn *srvc = (struct rspro_server_conn *) fi->priv; |
| 425 | int rc; |
| 426 | |
Harald Welte | 03b2411 | 2019-03-08 19:43:02 +0100 | [diff] [blame] | 427 | ipa_keepalive_fsm_stop(srvc->keepalive_fi); |
| 428 | |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 429 | /* Attempt to connect TCP socket */ |
| 430 | rc = ipa_client_conn_open(srvc->conn); |
| 431 | if (rc < 0) { |
| 432 | fprintf(stderr, "Unable to connect RSPRO to %s:%d - %s\n", |
| 433 | srvc->server_host, srvc->server_port, strerror(errno)); |
| 434 | /* FIXME: retry? Timer? Abort? */ |
| 435 | OSMO_ASSERT(0); |
| 436 | } |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 437 | } |
| 438 | |
| 439 | static void srvc_st_reestablish(struct osmo_fsm_inst *fi, uint32_t event, void *data) |
| 440 | { |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 441 | switch (event) { |
Harald Welte | 52cc7db | 2018-09-24 11:51:51 +0200 | [diff] [blame] | 442 | case SRVC_E_TCP_UP: |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 443 | osmo_fsm_inst_state_chg(fi, SRVC_ST_ESTABLISHED, T1_WAIT_CLIENT_CONN_RES, 1); |
| 444 | break; |
Harald Welte | 52cc7db | 2018-09-24 11:51:51 +0200 | [diff] [blame] | 445 | case SRVC_E_TCP_DOWN: |
| 446 | /* wait for normal T2 call-back */ |
| 447 | break; |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 448 | default: |
| 449 | OSMO_ASSERT(0); |
| 450 | } |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 451 | } |
| 452 | |
| 453 | static int server_conn_fsm_timer_cb(struct osmo_fsm_inst *fi) |
| 454 | { |
Harald Welte | 52cc7db | 2018-09-24 11:51:51 +0200 | [diff] [blame] | 455 | switch (fi->T) { |
| 456 | case 2: |
| 457 | osmo_fsm_inst_state_chg(fi, SRVC_ST_REESTABLISH, T2_RECONNECT, 2); |
| 458 | break; |
| 459 | case 1: |
| 460 | /* FIXME: close connection and re-start connection attempt */ |
| 461 | break; |
| 462 | default: |
| 463 | OSMO_ASSERT(0); |
| 464 | } |
| 465 | |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 466 | return 0; |
| 467 | } |
| 468 | |
| 469 | static const struct osmo_fsm_state server_conn_fsm_states[] = { |
| 470 | [SRVC_ST_INIT] = { |
| 471 | .name = "INIT", |
Harald Welte | 52cc7db | 2018-09-24 11:51:51 +0200 | [diff] [blame] | 472 | .in_event_mask = S(SRVC_E_TCP_UP) | S(SRVC_E_TCP_DOWN), |
| 473 | .out_state_mask = S(SRVC_ST_ESTABLISHED) | S(SRVC_ST_REESTABLISH), |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 474 | .action = srvc_st_init, |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 475 | .onenter = srvc_st_init_onenter, |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 476 | }, |
| 477 | [SRVC_ST_ESTABLISHED] = { |
| 478 | .name = "ESTABLISHED", |
Harald Welte | 03b2411 | 2019-03-08 19:43:02 +0100 | [diff] [blame] | 479 | .in_event_mask = S(SRVC_E_TCP_DOWN) | S(SRVC_E_KA_TIMEOUT) | S(SRVC_E_CLIENT_CONN_RES), |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 480 | .out_state_mask = S(SRVC_ST_CONNECTED) | S(SRVC_ST_REESTABLISH), |
| 481 | .action = srvc_st_established, |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 482 | .onenter = srvc_st_established_onenter, |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 483 | }, |
| 484 | [SRVC_ST_CONNECTED] = { |
| 485 | .name = "CONNECTED", |
Harald Welte | 03b2411 | 2019-03-08 19:43:02 +0100 | [diff] [blame] | 486 | .in_event_mask = S(SRVC_E_TCP_DOWN) | S(SRVC_E_KA_TIMEOUT), |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 487 | .out_state_mask = S(SRVC_ST_REESTABLISH), |
| 488 | .action = srvc_st_connected, |
| 489 | }, |
| 490 | [SRVC_ST_REESTABLISH] = { |
| 491 | .name = "REESTABLISH", |
Harald Welte | 52cc7db | 2018-09-24 11:51:51 +0200 | [diff] [blame] | 492 | .in_event_mask = S(SRVC_E_TCP_UP) | S(SRVC_E_TCP_DOWN), |
| 493 | .out_state_mask = S(SRVC_ST_ESTABLISHED) | S(SRVC_ST_REESTABLISH), |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 494 | .action = srvc_st_reestablish, |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 495 | .onenter = srvc_st_reestablish_onenter, |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 496 | }, |
| 497 | }; |
| 498 | |
| 499 | struct osmo_fsm remsim_client_server_fsm = { |
| 500 | .name = "SERVER_CONN", |
| 501 | .states = server_conn_fsm_states, |
| 502 | .num_states = ARRAY_SIZE(server_conn_fsm_states), |
| 503 | .timer_cb = server_conn_fsm_timer_cb, |
| 504 | .log_subsys = DMAIN, |
| 505 | .event_names = server_conn_fsm_event_names, |
| 506 | }; |
| 507 | |
Harald Welte | 098ef87 | 2018-10-14 20:08:50 +0200 | [diff] [blame] | 508 | int server_conn_fsm_alloc(void *ctx, struct rspro_server_conn *srvc) |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 509 | { |
| 510 | struct osmo_fsm_inst *fi; |
| 511 | |
Harald Welte | 098ef87 | 2018-10-14 20:08:50 +0200 | [diff] [blame] | 512 | fi = osmo_fsm_inst_alloc(&remsim_client_server_fsm, ctx, srvc, LOGL_DEBUG, "server"); |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 513 | if (!fi) |
| 514 | return -1; |
| 515 | |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 516 | srvc->fi = fi; |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 517 | /* onenter of the initial state is not automatically executed by osmo_fsm :( */ |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 518 | srvc_st_init_onenter(fi, 0); |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 519 | return 0; |
| 520 | } |
Harald Welte | 7fc64bc | 2019-03-02 12:55:59 +0100 | [diff] [blame] | 521 | |
| 522 | static __attribute__((constructor)) void on_dso_load(void) |
| 523 | { |
| 524 | osmo_fsm_register(&remsim_client_bankd_fsm); |
| 525 | osmo_fsm_register(&remsim_client_server_fsm); |
| 526 | } |