Harald Welte | 3dcdd20 | 2019-03-09 13:06:46 +0100 | [diff] [blame] | 1 | /* (C) 2018-2019 by Harald Welte <laforge@gnumonks.org> |
| 2 | * |
| 3 | * All Rights Reserved |
| 4 | * |
| 5 | * SPDX-License-Identifier: GPL-2.0+ |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License along |
| 18 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 19 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | */ |
| 22 | |
| 23 | |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 24 | #include <stdint.h> |
| 25 | #include <string.h> |
| 26 | #include <errno.h> |
| 27 | |
| 28 | #include <talloc.h> |
| 29 | |
| 30 | #include <osmocom/core/logging.h> |
| 31 | #include <osmocom/core/utils.h> |
| 32 | #include <osmocom/core/msgb.h> |
| 33 | #include <osmocom/core/fsm.h> |
| 34 | |
| 35 | #include <osmocom/abis/ipa.h> |
| 36 | #include <osmocom/gsm/protocol/ipaccess.h> |
| 37 | |
| 38 | #include "client.h" |
| 39 | #include "rspro_util.h" |
| 40 | |
| 41 | #define S(x) (1 << (x)) |
| 42 | |
Harald Welte | 707c85a | 2019-03-09 12:56:35 +0100 | [diff] [blame] | 43 | #define T1_WAIT_CLIENT_CONN_RES 10 |
| 44 | #define T2_RECONNECT 10 |
| 45 | |
| 46 | /*********************************************************************** |
Harald Welte | 0a68497 | 2019-12-02 20:10:59 +0100 | [diff] [blame] | 47 | * client-side FSM for a RSPRO connection to remsim-server |
| 48 | * |
| 49 | * This implements the TCP/IPA client side of an RSPRO connection between |
| 50 | * a logical (TCP-level) client implementation and a remote RSPRO server. |
| 51 | * |
| 52 | * 'client' and 'server' here strictly refer to RSPRO protocol roles, not |
| 53 | * to be confused with the remsim-client or remsim-server! |
| 54 | * |
| 55 | * Specifically, this RSPRO client FSM is used by both remsim-client and |
| 56 | * remsim-bankd for their RSPRO control connection to remsim-server. |
Harald Welte | 707c85a | 2019-03-09 12:56:35 +0100 | [diff] [blame] | 57 | ***********************************************************************/ |
| 58 | |
Harald Welte | 7f0e82f | 2018-10-14 20:07:59 +0200 | [diff] [blame] | 59 | static void push_and_send(struct ipa_client_conn *ipa, struct msgb *msg_tx) |
| 60 | { |
| 61 | ipa_prepend_header_ext(msg_tx, IPAC_PROTO_EXT_RSPRO); |
| 62 | ipa_msg_push_header(msg_tx, IPAC_PROTO_OSMO); |
| 63 | ipa_client_conn_send(ipa, msg_tx); |
| 64 | /* msg_tx is now queued and will be freed. */ |
| 65 | } |
| 66 | |
Harald Welte | a844bb0 | 2019-03-09 13:38:50 +0100 | [diff] [blame] | 67 | int ipa_client_conn_send_rspro(struct ipa_client_conn *ipa, RsproPDU_t *rspro) |
Harald Welte | 7f0e82f | 2018-10-14 20:07:59 +0200 | [diff] [blame] | 68 | { |
| 69 | struct msgb *msg = rspro_enc_msg(rspro); |
Harald Welte | 2eee450 | 2019-03-30 08:50:35 +0100 | [diff] [blame] | 70 | if (!msg) { |
Harald Welte | a8b86ce | 2019-03-31 14:59:20 +0200 | [diff] [blame] | 71 | LOGP(DMAIN, LOGL_ERROR, "Error encoding RSPRO: %s\n", rspro_msgt_name(rspro)); |
| 72 | osmo_log_backtrace(DMAIN, LOGL_ERROR); |
Harald Welte | 2eee450 | 2019-03-30 08:50:35 +0100 | [diff] [blame] | 73 | ASN_STRUCT_FREE(asn_DEF_RsproPDU, rspro); |
Harald Welte | a844bb0 | 2019-03-09 13:38:50 +0100 | [diff] [blame] | 74 | return -1; |
Harald Welte | 2eee450 | 2019-03-30 08:50:35 +0100 | [diff] [blame] | 75 | } |
Harald Welte | 7f0e82f | 2018-10-14 20:07:59 +0200 | [diff] [blame] | 76 | push_and_send(ipa, msg); |
Harald Welte | a844bb0 | 2019-03-09 13:38:50 +0100 | [diff] [blame] | 77 | return 0; |
| 78 | } |
| 79 | |
| 80 | int server_conn_send_rspro(struct rspro_server_conn *srvc, RsproPDU_t *rspro) |
| 81 | { |
Harald Welte | a8b86ce | 2019-03-31 14:59:20 +0200 | [diff] [blame] | 82 | if (!rspro) { |
| 83 | LOGPFSML(srvc->fi, LOGL_ERROR, "Attempt to transmit NULL\n"); |
| 84 | osmo_log_backtrace(DMAIN, LOGL_ERROR); |
| 85 | return -EINVAL; |
| 86 | } |
Harald Welte | b49ac9c | 2019-03-09 20:36:07 +0100 | [diff] [blame] | 87 | LOGPFSM(srvc->fi, "Tx RSPRO %s\n", rspro_msgt_name(rspro)); |
Harald Welte | a844bb0 | 2019-03-09 13:38:50 +0100 | [diff] [blame] | 88 | return ipa_client_conn_send_rspro(srvc->conn, rspro); |
Harald Welte | 7f0e82f | 2018-10-14 20:07:59 +0200 | [diff] [blame] | 89 | } |
| 90 | |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 91 | enum server_conn_fsm_state { |
| 92 | /* waiting for initial connectiong to remsim-server */ |
| 93 | SRVC_ST_INIT, |
| 94 | /* server connection established, waiting for ClientConnectRes */ |
| 95 | SRVC_ST_ESTABLISHED, |
| 96 | /* server connection etsablished, ClientConnect succeeded */ |
| 97 | SRVC_ST_CONNECTED, |
| 98 | /* connection lost, we're waiting for a re-establish */ |
| 99 | SRVC_ST_REESTABLISH, |
| 100 | }; |
| 101 | |
| 102 | static const struct value_string server_conn_fsm_event_names[] = { |
| 103 | OSMO_VALUE_STRING(SRVC_E_TCP_UP), |
| 104 | OSMO_VALUE_STRING(SRVC_E_TCP_DOWN), |
Harald Welte | 03b2411 | 2019-03-08 19:43:02 +0100 | [diff] [blame] | 105 | OSMO_VALUE_STRING(SRVC_E_KA_TIMEOUT), |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 106 | OSMO_VALUE_STRING(SRVC_E_CLIENT_CONN_RES), |
| 107 | { 0, NULL } |
| 108 | }; |
| 109 | |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 110 | static void srvc_updown_cb(struct ipa_client_conn *conn, int up) |
| 111 | { |
| 112 | struct rspro_server_conn *srvc = conn->data; |
| 113 | |
Harald Welte | e57334e | 2019-03-27 22:58:10 +0100 | [diff] [blame] | 114 | LOGPFSM(srvc->fi, "RSPRO link to %s:%d %s\n", conn->addr, conn->port, up ? "UP" : "DOWN"); |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 115 | |
| 116 | osmo_fsm_inst_dispatch(srvc->fi, up ? SRVC_E_TCP_UP: SRVC_E_TCP_DOWN, 0); |
| 117 | } |
| 118 | |
| 119 | static int srvc_read_cb(struct ipa_client_conn *conn, struct msgb *msg) |
| 120 | { |
| 121 | struct ipaccess_head *hh = (struct ipaccess_head *) msg->data; |
| 122 | struct ipaccess_head_ext *he = (struct ipaccess_head_ext *) msgb_l2(msg); |
| 123 | struct rspro_server_conn *srvc = conn->data; |
Harald Welte | f9995a3 | 2018-10-14 20:40:05 +0200 | [diff] [blame] | 124 | RsproPDU_t *pdu; |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 125 | int rc; |
| 126 | |
| 127 | if (msgb_length(msg) < sizeof(*hh)) |
| 128 | goto invalid; |
| 129 | msg->l2h = &hh->data[0]; |
Harald Welte | 1a17104 | 2019-03-08 19:18:52 +0100 | [diff] [blame] | 130 | switch (hh->proto) { |
Harald Welte | 03b2411 | 2019-03-08 19:43:02 +0100 | [diff] [blame] | 131 | case IPAC_PROTO_IPACCESS: |
| 132 | rc = ipaccess_bts_handle_ccm(srvc->conn, &srvc->ipa_dev, msg); |
Harald Welte | cacbc2b | 2019-07-24 18:42:02 +0200 | [diff] [blame] | 133 | if (rc < 0) { |
| 134 | msgb_free(msg); |
Harald Welte | 03b2411 | 2019-03-08 19:43:02 +0100 | [diff] [blame] | 135 | break; |
Harald Welte | cacbc2b | 2019-07-24 18:42:02 +0200 | [diff] [blame] | 136 | } |
Harald Welte | 03b2411 | 2019-03-08 19:43:02 +0100 | [diff] [blame] | 137 | switch (hh->data[0]) { |
| 138 | case IPAC_MSGT_PONG: |
| 139 | ipa_keepalive_fsm_pong_received(srvc->keepalive_fi); |
| 140 | rc = 0; |
| 141 | break; |
| 142 | default: |
| 143 | break; |
| 144 | } |
| 145 | break; |
Harald Welte | 1a17104 | 2019-03-08 19:18:52 +0100 | [diff] [blame] | 146 | case IPAC_PROTO_OSMO: |
| 147 | if (!he || msgb_l2len(msg) < sizeof(*he)) |
| 148 | goto invalid; |
| 149 | msg->l2h = &he->data[0]; |
| 150 | switch (he->proto) { |
| 151 | case IPAC_PROTO_EXT_RSPRO: |
Harald Welte | e57334e | 2019-03-27 22:58:10 +0100 | [diff] [blame] | 152 | LOGPFSM(srvc->fi, "Received RSPRO %s\n", msgb_hexdump(msg)); |
Harald Welte | 9392e08 | 2019-07-23 18:14:18 +0200 | [diff] [blame] | 153 | /* respro_dec_msg() takes ownership of the input message buffer in successful |
| 154 | * and unsuccessful cases */ |
Harald Welte | 1a17104 | 2019-03-08 19:18:52 +0100 | [diff] [blame] | 155 | pdu = rspro_dec_msg(msg); |
| 156 | if (!pdu) |
Harald Welte | 573a5b9 | 2019-09-12 20:27:58 +0200 | [diff] [blame] | 157 | break; |
Harald Welte | 1a17104 | 2019-03-08 19:18:52 +0100 | [diff] [blame] | 158 | rc = srvc->handle_rx(srvc, pdu); |
| 159 | ASN_STRUCT_FREE(asn_DEF_RsproPDU, pdu); |
| 160 | break; |
| 161 | default: |
| 162 | goto invalid; |
| 163 | } |
| 164 | break; |
| 165 | default: |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 166 | goto invalid; |
Harald Welte | 1a17104 | 2019-03-08 19:18:52 +0100 | [diff] [blame] | 167 | } |
Harald Welte | 573a5b9 | 2019-09-12 20:27:58 +0200 | [diff] [blame] | 168 | |
| 169 | msgb_free(msg); |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 170 | return rc; |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 171 | |
| 172 | invalid: |
Harald Welte | e57334e | 2019-03-27 22:58:10 +0100 | [diff] [blame] | 173 | LOGPFSML(srvc->fi, LOGL_ERROR, "Error decoding PDU\n"); |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 174 | msgb_free(msg); |
| 175 | return -1; |
| 176 | } |
| 177 | |
Harald Welte | 03b2411 | 2019-03-08 19:43:02 +0100 | [diff] [blame] | 178 | static const struct ipa_keepalive_params ka_params = { |
| 179 | .interval = 30, |
| 180 | .wait_for_resp = 10, |
| 181 | }; |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 182 | |
| 183 | static void srvc_st_init_onenter(struct osmo_fsm_inst *fi, uint32_t prev_state) |
| 184 | { |
| 185 | struct rspro_server_conn *srvc = (struct rspro_server_conn *) fi->priv; |
| 186 | int rc; |
| 187 | |
Harald Welte | 098ef87 | 2018-10-14 20:08:50 +0200 | [diff] [blame] | 188 | 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] | 189 | srvc_updown_cb, srvc_read_cb, NULL, srvc); |
| 190 | if (!srvc->conn) { |
Harald Welte | 03b2411 | 2019-03-08 19:43:02 +0100 | [diff] [blame] | 191 | LOGPFSM(fi, "Unable to create socket: %s\n", strerror(errno)); |
| 192 | goto out_fi; |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 193 | } |
Harald Welte | 03b2411 | 2019-03-08 19:43:02 +0100 | [diff] [blame] | 194 | |
| 195 | srvc->keepalive_fi = ipa_client_conn_alloc_keepalive_fsm(srvc->conn, &ka_params, fi->id); |
| 196 | if (!srvc->keepalive_fi) { |
| 197 | LOGPFSM(fi, "Unable to create keepalive FSM\n"); |
| 198 | goto out_conn; |
| 199 | } |
| 200 | /* ensure parent is notified once keepalive FSM instance is dying */ |
| 201 | osmo_fsm_inst_change_parent(srvc->keepalive_fi, srvc->fi, SRVC_E_KA_TIMEOUT); |
| 202 | |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 203 | /* Attempt to connect TCP socket */ |
| 204 | rc = ipa_client_conn_open(srvc->conn); |
| 205 | if (rc < 0) { |
Harald Welte | e57334e | 2019-03-27 22:58:10 +0100 | [diff] [blame] | 206 | LOGPFSML(fi, LOGL_NOTICE, "Unable to connect: %s\n", strerror(errno)); |
Harald Welte | 03b2411 | 2019-03-08 19:43:02 +0100 | [diff] [blame] | 207 | goto out_ka; |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 208 | } |
Harald Welte | 03b2411 | 2019-03-08 19:43:02 +0100 | [diff] [blame] | 209 | |
| 210 | return; |
| 211 | |
| 212 | out_ka: |
| 213 | osmo_fsm_inst_term(srvc->keepalive_fi, OSMO_FSM_TERM_ERROR, NULL); |
| 214 | out_conn: |
| 215 | ipa_client_conn_destroy(srvc->conn); |
| 216 | out_fi: |
| 217 | osmo_fsm_inst_term(fi, OSMO_FSM_TERM_ERROR, NULL); |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 218 | } |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 219 | |
| 220 | static void srvc_st_init(struct osmo_fsm_inst *fi, uint32_t event, void *data) |
| 221 | { |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 222 | switch (event) { |
| 223 | case SRVC_E_TCP_UP: |
| 224 | osmo_fsm_inst_state_chg(fi, SRVC_ST_ESTABLISHED, T1_WAIT_CLIENT_CONN_RES, 1); |
| 225 | break; |
Harald Welte | 52cc7db | 2018-09-24 11:51:51 +0200 | [diff] [blame] | 226 | case SRVC_E_TCP_DOWN: |
| 227 | osmo_fsm_inst_state_chg(fi, SRVC_ST_REESTABLISH, T2_RECONNECT, 2); |
| 228 | break; |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 229 | default: |
| 230 | OSMO_ASSERT(0); |
| 231 | } |
| 232 | } |
| 233 | |
| 234 | static void srvc_st_established_onenter(struct osmo_fsm_inst *fi, uint32_t prev_state) |
| 235 | { |
| 236 | struct rspro_server_conn *srvc = (struct rspro_server_conn *) fi->priv; |
| 237 | RsproPDU_t *pdu; |
| 238 | |
Harald Welte | 03b2411 | 2019-03-08 19:43:02 +0100 | [diff] [blame] | 239 | ipa_keepalive_fsm_start(srvc->keepalive_fi); |
| 240 | |
Harald Welte | 707c85a | 2019-03-09 12:56:35 +0100 | [diff] [blame] | 241 | if (srvc->own_comp_id.type == ComponentType_remsimClient) |
| 242 | pdu = rspro_gen_ConnectClientReq(&srvc->own_comp_id, srvc->clslot); |
| 243 | else |
Harald Welte | 4fa407a | 2019-04-01 21:05:06 +0200 | [diff] [blame] | 244 | pdu = rspro_gen_ConnectBankReq(&srvc->own_comp_id, srvc->bankd.bank_id, |
| 245 | srvc->bankd.num_slots); |
Harald Welte | a844bb0 | 2019-03-09 13:38:50 +0100 | [diff] [blame] | 246 | server_conn_send_rspro(srvc, pdu); |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 247 | } |
| 248 | |
| 249 | static void srvc_st_established(struct osmo_fsm_inst *fi, uint32_t event, void *data) |
| 250 | { |
Harald Welte | 4e7a285 | 2019-03-17 21:01:50 +0100 | [diff] [blame] | 251 | struct rspro_server_conn *srvc = (struct rspro_server_conn *) fi->priv; |
| 252 | RsproPDU_t *pdu = NULL; |
| 253 | e_ResultCode res; |
| 254 | |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 255 | switch (event) { |
| 256 | case SRVC_E_TCP_DOWN: |
Harald Welte | 03b2411 | 2019-03-08 19:43:02 +0100 | [diff] [blame] | 257 | case SRVC_E_KA_TIMEOUT: |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 258 | osmo_fsm_inst_state_chg(fi, SRVC_ST_REESTABLISH, T2_RECONNECT, 2); |
| 259 | break; |
| 260 | case SRVC_E_CLIENT_CONN_RES: |
Harald Welte | 4e7a285 | 2019-03-17 21:01:50 +0100 | [diff] [blame] | 261 | pdu = data; |
| 262 | res = rspro_get_result(pdu); |
| 263 | if (res != ResultCode_ok) { |
| 264 | ipa_client_conn_close(srvc->conn); |
| 265 | osmo_fsm_inst_dispatch(fi, SRVC_E_TCP_DOWN, NULL); |
| 266 | } else { |
| 267 | /* somehow notify the main code? */ |
| 268 | osmo_fsm_inst_state_chg(fi, SRVC_ST_CONNECTED, 0, 0); |
| 269 | } |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 270 | break; |
| 271 | default: |
| 272 | OSMO_ASSERT(0); |
| 273 | } |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 274 | } |
| 275 | |
| 276 | static void srvc_st_connected(struct osmo_fsm_inst *fi, uint32_t event, void *data) |
| 277 | { |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 278 | switch (event) { |
| 279 | case SRVC_E_TCP_DOWN: |
Harald Welte | 03b2411 | 2019-03-08 19:43:02 +0100 | [diff] [blame] | 280 | case SRVC_E_KA_TIMEOUT: |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 281 | osmo_fsm_inst_state_chg(fi, SRVC_ST_REESTABLISH, T2_RECONNECT, 2); |
| 282 | break; |
| 283 | default: |
| 284 | OSMO_ASSERT(0); |
| 285 | } |
| 286 | } |
| 287 | |
| 288 | static void srvc_st_reestablish_onenter(struct osmo_fsm_inst *fi, uint32_t prev_state) |
| 289 | { |
| 290 | struct rspro_server_conn *srvc = (struct rspro_server_conn *) fi->priv; |
| 291 | int rc; |
| 292 | |
Harald Welte | 03b2411 | 2019-03-08 19:43:02 +0100 | [diff] [blame] | 293 | ipa_keepalive_fsm_stop(srvc->keepalive_fi); |
| 294 | |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 295 | /* Attempt to connect TCP socket */ |
| 296 | rc = ipa_client_conn_open(srvc->conn); |
| 297 | if (rc < 0) { |
Harald Welte | e57334e | 2019-03-27 22:58:10 +0100 | [diff] [blame] | 298 | LOGPFSM(fi, "Unable to connect RSPRO to %s:%d - %s\n", |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 299 | srvc->server_host, srvc->server_port, strerror(errno)); |
| 300 | /* FIXME: retry? Timer? Abort? */ |
| 301 | OSMO_ASSERT(0); |
| 302 | } |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 303 | } |
| 304 | |
| 305 | static void srvc_st_reestablish(struct osmo_fsm_inst *fi, uint32_t event, void *data) |
| 306 | { |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 307 | switch (event) { |
Harald Welte | 52cc7db | 2018-09-24 11:51:51 +0200 | [diff] [blame] | 308 | case SRVC_E_TCP_UP: |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 309 | osmo_fsm_inst_state_chg(fi, SRVC_ST_ESTABLISHED, T1_WAIT_CLIENT_CONN_RES, 1); |
| 310 | break; |
Harald Welte | 52cc7db | 2018-09-24 11:51:51 +0200 | [diff] [blame] | 311 | case SRVC_E_TCP_DOWN: |
| 312 | /* wait for normal T2 call-back */ |
| 313 | break; |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 314 | default: |
| 315 | OSMO_ASSERT(0); |
| 316 | } |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 317 | } |
| 318 | |
| 319 | static int server_conn_fsm_timer_cb(struct osmo_fsm_inst *fi) |
| 320 | { |
Harald Welte | a025e70 | 2019-03-09 21:39:09 +0100 | [diff] [blame] | 321 | struct rspro_server_conn *srvc = (struct rspro_server_conn *) fi->priv; |
| 322 | |
Harald Welte | 52cc7db | 2018-09-24 11:51:51 +0200 | [diff] [blame] | 323 | switch (fi->T) { |
| 324 | case 2: |
| 325 | osmo_fsm_inst_state_chg(fi, SRVC_ST_REESTABLISH, T2_RECONNECT, 2); |
| 326 | break; |
| 327 | case 1: |
Harald Welte | f511667 | 2019-04-02 20:55:06 +0200 | [diff] [blame] | 328 | /* close connection and re-start connection attempt */ |
Harald Welte | a025e70 | 2019-03-09 21:39:09 +0100 | [diff] [blame] | 329 | ipa_client_conn_close(srvc->conn); |
| 330 | osmo_fsm_inst_dispatch(fi, SRVC_E_TCP_DOWN, NULL); |
Harald Welte | 52cc7db | 2018-09-24 11:51:51 +0200 | [diff] [blame] | 331 | break; |
| 332 | default: |
| 333 | OSMO_ASSERT(0); |
| 334 | } |
| 335 | |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 336 | return 0; |
| 337 | } |
| 338 | |
| 339 | static const struct osmo_fsm_state server_conn_fsm_states[] = { |
| 340 | [SRVC_ST_INIT] = { |
| 341 | .name = "INIT", |
Harald Welte | 52cc7db | 2018-09-24 11:51:51 +0200 | [diff] [blame] | 342 | .in_event_mask = S(SRVC_E_TCP_UP) | S(SRVC_E_TCP_DOWN), |
| 343 | .out_state_mask = S(SRVC_ST_ESTABLISHED) | S(SRVC_ST_REESTABLISH), |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 344 | .action = srvc_st_init, |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 345 | .onenter = srvc_st_init_onenter, |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 346 | }, |
| 347 | [SRVC_ST_ESTABLISHED] = { |
| 348 | .name = "ESTABLISHED", |
Harald Welte | 03b2411 | 2019-03-08 19:43:02 +0100 | [diff] [blame] | 349 | .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] | 350 | .out_state_mask = S(SRVC_ST_CONNECTED) | S(SRVC_ST_REESTABLISH), |
| 351 | .action = srvc_st_established, |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 352 | .onenter = srvc_st_established_onenter, |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 353 | }, |
| 354 | [SRVC_ST_CONNECTED] = { |
| 355 | .name = "CONNECTED", |
Harald Welte | 03b2411 | 2019-03-08 19:43:02 +0100 | [diff] [blame] | 356 | .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] | 357 | .out_state_mask = S(SRVC_ST_REESTABLISH), |
| 358 | .action = srvc_st_connected, |
| 359 | }, |
| 360 | [SRVC_ST_REESTABLISH] = { |
| 361 | .name = "REESTABLISH", |
Harald Welte | 52cc7db | 2018-09-24 11:51:51 +0200 | [diff] [blame] | 362 | .in_event_mask = S(SRVC_E_TCP_UP) | S(SRVC_E_TCP_DOWN), |
| 363 | .out_state_mask = S(SRVC_ST_ESTABLISHED) | S(SRVC_ST_REESTABLISH), |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 364 | .action = srvc_st_reestablish, |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 365 | .onenter = srvc_st_reestablish_onenter, |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 366 | }, |
| 367 | }; |
| 368 | |
Harald Welte | 3cded63 | 2019-03-09 12:59:41 +0100 | [diff] [blame] | 369 | struct osmo_fsm rspro_client_server_fsm = { |
| 370 | .name = "RSPRO_CLIENT", |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 371 | .states = server_conn_fsm_states, |
| 372 | .num_states = ARRAY_SIZE(server_conn_fsm_states), |
| 373 | .timer_cb = server_conn_fsm_timer_cb, |
| 374 | .log_subsys = DMAIN, |
| 375 | .event_names = server_conn_fsm_event_names, |
| 376 | }; |
| 377 | |
Harald Welte | 098ef87 | 2018-10-14 20:08:50 +0200 | [diff] [blame] | 378 | int server_conn_fsm_alloc(void *ctx, struct rspro_server_conn *srvc) |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 379 | { |
| 380 | struct osmo_fsm_inst *fi; |
| 381 | |
Harald Welte | 3cded63 | 2019-03-09 12:59:41 +0100 | [diff] [blame] | 382 | fi = osmo_fsm_inst_alloc(&rspro_client_server_fsm, ctx, srvc, LOGL_DEBUG, "server"); |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 383 | if (!fi) |
| 384 | return -1; |
| 385 | |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 386 | srvc->fi = fi; |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 387 | /* onenter of the initial state is not automatically executed by osmo_fsm :( */ |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 388 | srvc_st_init_onenter(fi, 0); |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 389 | return 0; |
| 390 | } |
Harald Welte | 7fc64bc | 2019-03-02 12:55:59 +0100 | [diff] [blame] | 391 | |
| 392 | static __attribute__((constructor)) void on_dso_load(void) |
| 393 | { |
Harald Welte | 4ccd2fc | 2019-12-01 13:32:54 +0100 | [diff] [blame] | 394 | OSMO_ASSERT(osmo_fsm_register(&rspro_client_server_fsm) == 0); |
Harald Welte | 7fc64bc | 2019-03-02 12:55:59 +0100 | [diff] [blame] | 395 | } |