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 | |
Harald Welte | f7598fe | 2019-12-16 16:52:45 +0100 | [diff] [blame] | 38 | #include "debug.h" |
| 39 | #include "rspro_client_fsm.h" |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 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 | 6d61b16 | 2019-12-02 22:47:35 +0100 | [diff] [blame] | 67 | static 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 | |
Harald Welte | a3b14d1 | 2019-12-02 22:58:34 +0100 | [diff] [blame] | 80 | static int _server_conn_send_rspro(struct rspro_server_conn *srvc, RsproPDU_t *rspro) |
| 81 | { |
| 82 | LOGPFSM(srvc->fi, "Tx RSPRO %s\n", rspro_msgt_name(rspro)); |
| 83 | return ipa_client_conn_send_rspro(srvc->conn, rspro); |
| 84 | } |
| 85 | |
Harald Welte | a844bb0 | 2019-03-09 13:38:50 +0100 | [diff] [blame] | 86 | int server_conn_send_rspro(struct rspro_server_conn *srvc, RsproPDU_t *rspro) |
| 87 | { |
Harald Welte | a8b86ce | 2019-03-31 14:59:20 +0200 | [diff] [blame] | 88 | if (!rspro) { |
| 89 | LOGPFSML(srvc->fi, LOGL_ERROR, "Attempt to transmit NULL\n"); |
| 90 | osmo_log_backtrace(DMAIN, LOGL_ERROR); |
| 91 | return -EINVAL; |
| 92 | } |
Harald Welte | a3b14d1 | 2019-12-02 22:58:34 +0100 | [diff] [blame] | 93 | if (osmo_fsm_inst_dispatch(srvc->fi, SRVC_E_RSPRO_TX, rspro) < 0) { |
| 94 | ASN_STRUCT_FREE(asn_DEF_RsproPDU, rspro); |
| 95 | return -EPERM; |
| 96 | } |
| 97 | return 0; |
Harald Welte | 7f0e82f | 2018-10-14 20:07:59 +0200 | [diff] [blame] | 98 | } |
| 99 | |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 100 | enum server_conn_fsm_state { |
| 101 | /* waiting for initial connectiong to remsim-server */ |
| 102 | SRVC_ST_INIT, |
| 103 | /* server connection established, waiting for ClientConnectRes */ |
| 104 | SRVC_ST_ESTABLISHED, |
| 105 | /* server connection etsablished, ClientConnect succeeded */ |
| 106 | SRVC_ST_CONNECTED, |
| 107 | /* connection lost, we're waiting for a re-establish */ |
| 108 | SRVC_ST_REESTABLISH, |
| 109 | }; |
| 110 | |
| 111 | static const struct value_string server_conn_fsm_event_names[] = { |
Harald Welte | d2192e2 | 2019-11-07 18:10:57 +0100 | [diff] [blame] | 112 | OSMO_VALUE_STRING(SRVC_E_ESTABLISH), |
Harald Welte | 16c81ea | 2020-02-16 14:44:00 +0100 | [diff] [blame] | 113 | OSMO_VALUE_STRING(SRVC_E_DISCONNECT), |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 114 | OSMO_VALUE_STRING(SRVC_E_TCP_UP), |
| 115 | OSMO_VALUE_STRING(SRVC_E_TCP_DOWN), |
Harald Welte | 03b2411 | 2019-03-08 19:43:02 +0100 | [diff] [blame] | 116 | OSMO_VALUE_STRING(SRVC_E_KA_TIMEOUT), |
Harald Welte | b8ec65a | 2019-12-14 17:16:12 +0100 | [diff] [blame] | 117 | OSMO_VALUE_STRING(SRVC_E_KA_TERMINATED), |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 118 | OSMO_VALUE_STRING(SRVC_E_CLIENT_CONN_RES), |
Harald Welte | a3b14d1 | 2019-12-02 22:58:34 +0100 | [diff] [blame] | 119 | OSMO_VALUE_STRING(SRVC_E_RSPRO_TX), |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 120 | { 0, NULL } |
| 121 | }; |
| 122 | |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 123 | static void srvc_updown_cb(struct ipa_client_conn *conn, int up) |
| 124 | { |
| 125 | struct rspro_server_conn *srvc = conn->data; |
| 126 | |
Harald Welte | e57334e | 2019-03-27 22:58:10 +0100 | [diff] [blame] | 127 | 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] | 128 | |
| 129 | osmo_fsm_inst_dispatch(srvc->fi, up ? SRVC_E_TCP_UP: SRVC_E_TCP_DOWN, 0); |
| 130 | } |
| 131 | |
| 132 | static int srvc_read_cb(struct ipa_client_conn *conn, struct msgb *msg) |
| 133 | { |
| 134 | struct ipaccess_head *hh = (struct ipaccess_head *) msg->data; |
| 135 | struct ipaccess_head_ext *he = (struct ipaccess_head_ext *) msgb_l2(msg); |
| 136 | struct rspro_server_conn *srvc = conn->data; |
Harald Welte | f9995a3 | 2018-10-14 20:40:05 +0200 | [diff] [blame] | 137 | RsproPDU_t *pdu; |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 138 | int rc; |
| 139 | |
| 140 | if (msgb_length(msg) < sizeof(*hh)) |
| 141 | goto invalid; |
| 142 | msg->l2h = &hh->data[0]; |
Harald Welte | 1a17104 | 2019-03-08 19:18:52 +0100 | [diff] [blame] | 143 | switch (hh->proto) { |
Harald Welte | 03b2411 | 2019-03-08 19:43:02 +0100 | [diff] [blame] | 144 | case IPAC_PROTO_IPACCESS: |
| 145 | rc = ipaccess_bts_handle_ccm(srvc->conn, &srvc->ipa_dev, msg); |
Harald Welte | cacbc2b | 2019-07-24 18:42:02 +0200 | [diff] [blame] | 146 | if (rc < 0) { |
| 147 | msgb_free(msg); |
Harald Welte | 03b2411 | 2019-03-08 19:43:02 +0100 | [diff] [blame] | 148 | break; |
Harald Welte | cacbc2b | 2019-07-24 18:42:02 +0200 | [diff] [blame] | 149 | } |
Harald Welte | 03b2411 | 2019-03-08 19:43:02 +0100 | [diff] [blame] | 150 | switch (hh->data[0]) { |
| 151 | case IPAC_MSGT_PONG: |
| 152 | ipa_keepalive_fsm_pong_received(srvc->keepalive_fi); |
| 153 | rc = 0; |
| 154 | break; |
| 155 | default: |
| 156 | break; |
| 157 | } |
| 158 | break; |
Harald Welte | 1a17104 | 2019-03-08 19:18:52 +0100 | [diff] [blame] | 159 | case IPAC_PROTO_OSMO: |
| 160 | if (!he || msgb_l2len(msg) < sizeof(*he)) |
| 161 | goto invalid; |
| 162 | msg->l2h = &he->data[0]; |
| 163 | switch (he->proto) { |
| 164 | case IPAC_PROTO_EXT_RSPRO: |
Harald Welte | e57334e | 2019-03-27 22:58:10 +0100 | [diff] [blame] | 165 | LOGPFSM(srvc->fi, "Received RSPRO %s\n", msgb_hexdump(msg)); |
Harald Welte | 1a17104 | 2019-03-08 19:18:52 +0100 | [diff] [blame] | 166 | pdu = rspro_dec_msg(msg); |
Harald Welte | 9cdd094 | 2019-12-15 00:10:57 +0100 | [diff] [blame] | 167 | if (!pdu) { |
| 168 | rc = -EIO; |
Harald Welte | 573a5b9 | 2019-09-12 20:27:58 +0200 | [diff] [blame] | 169 | break; |
Harald Welte | 9cdd094 | 2019-12-15 00:10:57 +0100 | [diff] [blame] | 170 | } |
Harald Welte | 1a17104 | 2019-03-08 19:18:52 +0100 | [diff] [blame] | 171 | rc = srvc->handle_rx(srvc, pdu); |
| 172 | ASN_STRUCT_FREE(asn_DEF_RsproPDU, pdu); |
| 173 | break; |
| 174 | default: |
| 175 | goto invalid; |
| 176 | } |
| 177 | break; |
| 178 | default: |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 179 | goto invalid; |
Harald Welte | 1a17104 | 2019-03-08 19:18:52 +0100 | [diff] [blame] | 180 | } |
Harald Welte | 573a5b9 | 2019-09-12 20:27:58 +0200 | [diff] [blame] | 181 | |
| 182 | msgb_free(msg); |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 183 | return rc; |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 184 | |
| 185 | invalid: |
Harald Welte | e57334e | 2019-03-27 22:58:10 +0100 | [diff] [blame] | 186 | LOGPFSML(srvc->fi, LOGL_ERROR, "Error decoding PDU\n"); |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 187 | msgb_free(msg); |
| 188 | return -1; |
| 189 | } |
| 190 | |
Harald Welte | 03b2411 | 2019-03-08 19:43:02 +0100 | [diff] [blame] | 191 | static const struct ipa_keepalive_params ka_params = { |
| 192 | .interval = 30, |
| 193 | .wait_for_resp = 10, |
| 194 | }; |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 195 | |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 196 | static void srvc_st_init(struct osmo_fsm_inst *fi, uint32_t event, void *data) |
| 197 | { |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 198 | switch (event) { |
Harald Welte | d2192e2 | 2019-11-07 18:10:57 +0100 | [diff] [blame] | 199 | case SRVC_E_ESTABLISH: |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 200 | default: |
| 201 | OSMO_ASSERT(0); |
| 202 | } |
| 203 | } |
| 204 | |
| 205 | static void srvc_st_established_onenter(struct osmo_fsm_inst *fi, uint32_t prev_state) |
| 206 | { |
| 207 | struct rspro_server_conn *srvc = (struct rspro_server_conn *) fi->priv; |
| 208 | RsproPDU_t *pdu; |
| 209 | |
Harald Welte | 03b2411 | 2019-03-08 19:43:02 +0100 | [diff] [blame] | 210 | ipa_keepalive_fsm_start(srvc->keepalive_fi); |
| 211 | |
Harald Welte | 707c85a | 2019-03-09 12:56:35 +0100 | [diff] [blame] | 212 | if (srvc->own_comp_id.type == ComponentType_remsimClient) |
| 213 | pdu = rspro_gen_ConnectClientReq(&srvc->own_comp_id, srvc->clslot); |
| 214 | else |
Harald Welte | 4fa407a | 2019-04-01 21:05:06 +0200 | [diff] [blame] | 215 | pdu = rspro_gen_ConnectBankReq(&srvc->own_comp_id, srvc->bankd.bank_id, |
| 216 | srvc->bankd.num_slots); |
Harald Welte | a3b14d1 | 2019-12-02 22:58:34 +0100 | [diff] [blame] | 217 | _server_conn_send_rspro(srvc, pdu); |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 218 | } |
| 219 | |
| 220 | static void srvc_st_established(struct osmo_fsm_inst *fi, uint32_t event, void *data) |
| 221 | { |
Harald Welte | 4e7a285 | 2019-03-17 21:01:50 +0100 | [diff] [blame] | 222 | struct rspro_server_conn *srvc = (struct rspro_server_conn *) fi->priv; |
| 223 | RsproPDU_t *pdu = NULL; |
| 224 | e_ResultCode res; |
| 225 | |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 226 | switch (event) { |
| 227 | case SRVC_E_TCP_DOWN: |
Harald Welte | 03b2411 | 2019-03-08 19:43:02 +0100 | [diff] [blame] | 228 | case SRVC_E_KA_TIMEOUT: |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 229 | osmo_fsm_inst_state_chg(fi, SRVC_ST_REESTABLISH, T2_RECONNECT, 2); |
| 230 | break; |
| 231 | case SRVC_E_CLIENT_CONN_RES: |
Harald Welte | 4e7a285 | 2019-03-17 21:01:50 +0100 | [diff] [blame] | 232 | pdu = data; |
| 233 | res = rspro_get_result(pdu); |
| 234 | if (res != ResultCode_ok) { |
| 235 | ipa_client_conn_close(srvc->conn); |
| 236 | osmo_fsm_inst_dispatch(fi, SRVC_E_TCP_DOWN, NULL); |
| 237 | } else { |
| 238 | /* somehow notify the main code? */ |
| 239 | osmo_fsm_inst_state_chg(fi, SRVC_ST_CONNECTED, 0, 0); |
| 240 | } |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 241 | break; |
| 242 | default: |
| 243 | OSMO_ASSERT(0); |
| 244 | } |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 245 | } |
| 246 | |
| 247 | static void srvc_st_connected(struct osmo_fsm_inst *fi, uint32_t event, void *data) |
| 248 | { |
Harald Welte | a3b14d1 | 2019-12-02 22:58:34 +0100 | [diff] [blame] | 249 | struct rspro_server_conn *srvc = (struct rspro_server_conn *) fi->priv; |
| 250 | RsproPDU_t *pdu = NULL; |
| 251 | |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 252 | switch (event) { |
| 253 | case SRVC_E_TCP_DOWN: |
Harald Welte | 03b2411 | 2019-03-08 19:43:02 +0100 | [diff] [blame] | 254 | case SRVC_E_KA_TIMEOUT: |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 255 | osmo_fsm_inst_state_chg(fi, SRVC_ST_REESTABLISH, T2_RECONNECT, 2); |
| 256 | break; |
Harald Welte | a3b14d1 | 2019-12-02 22:58:34 +0100 | [diff] [blame] | 257 | case SRVC_E_RSPRO_TX: |
| 258 | pdu = data; |
| 259 | _server_conn_send_rspro(srvc, pdu); |
| 260 | break; |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 261 | default: |
| 262 | OSMO_ASSERT(0); |
| 263 | } |
| 264 | } |
| 265 | |
Harald Welte | b8ec65a | 2019-12-14 17:16:12 +0100 | [diff] [blame] | 266 | static int ipa_kaepalive_timeout_cb(struct osmo_fsm_inst *ka_fi, void *conn) |
| 267 | { |
| 268 | struct osmo_fsm_inst *fi = ka_fi->proc.parent; |
| 269 | osmo_fsm_inst_dispatch(fi, SRVC_E_KA_TIMEOUT, NULL); |
| 270 | return 0; /* we will explicitly terminate it */ |
| 271 | } |
| 272 | |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 273 | static void srvc_st_reestablish_onenter(struct osmo_fsm_inst *fi, uint32_t prev_state) |
| 274 | { |
| 275 | struct rspro_server_conn *srvc = (struct rspro_server_conn *) fi->priv; |
| 276 | int rc; |
| 277 | |
Harald Welte | d2192e2 | 2019-11-07 18:10:57 +0100 | [diff] [blame] | 278 | if (srvc->keepalive_fi) { |
| 279 | ipa_keepalive_fsm_stop(srvc->keepalive_fi); |
| 280 | osmo_fsm_inst_term(srvc->keepalive_fi, OSMO_FSM_TERM_REGULAR, NULL); |
| 281 | srvc->keepalive_fi = NULL; |
| 282 | } |
| 283 | |
| 284 | if (srvc->conn) { |
| 285 | LOGPFSML(fi, LOGL_INFO, "Destroying existing connection to server\n"); |
| 286 | ipa_client_conn_close(srvc->conn); |
| 287 | ipa_client_conn_destroy(srvc->conn); |
| 288 | srvc->conn = NULL; |
| 289 | } |
| 290 | LOGPFSML(fi, LOGL_INFO, "Creating TCP connection to server at %s:%u\n", |
| 291 | srvc->server_host, srvc->server_port); |
| 292 | srvc->conn = ipa_client_conn_create(fi, NULL, 0, srvc->server_host, srvc->server_port, |
| 293 | srvc_updown_cb, srvc_read_cb, NULL, srvc); |
| 294 | if (!srvc->conn) { |
| 295 | LOGPFSML(fi, LOGL_FATAL, "Unable to create socket: %s\n", strerror(errno)); |
| 296 | exit(1); |
| 297 | } |
| 298 | |
| 299 | srvc->keepalive_fi = ipa_client_conn_alloc_keepalive_fsm(srvc->conn, &ka_params, fi->id); |
| 300 | if (!srvc->keepalive_fi) { |
| 301 | LOGPFSM(fi, "Unable to create keepalive FSM\n"); |
| 302 | exit(1); |
| 303 | } |
Harald Welte | b8ec65a | 2019-12-14 17:16:12 +0100 | [diff] [blame] | 304 | ipa_keepalive_fsm_set_timeout_cb(srvc->keepalive_fi, ipa_kaepalive_timeout_cb); |
Harald Welte | d2192e2 | 2019-11-07 18:10:57 +0100 | [diff] [blame] | 305 | /* ensure parent is notified once keepalive FSM instance is dying */ |
Harald Welte | b8ec65a | 2019-12-14 17:16:12 +0100 | [diff] [blame] | 306 | osmo_fsm_inst_change_parent(srvc->keepalive_fi, srvc->fi, SRVC_E_KA_TERMINATED); |
Harald Welte | 03b2411 | 2019-03-08 19:43:02 +0100 | [diff] [blame] | 307 | |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 308 | /* Attempt to connect TCP socket */ |
| 309 | rc = ipa_client_conn_open(srvc->conn); |
| 310 | if (rc < 0) { |
Harald Welte | d2192e2 | 2019-11-07 18:10:57 +0100 | [diff] [blame] | 311 | LOGPFSML(fi, LOGL_FATAL, "Unable to connect RSPRO to %s:%u - %s\n", |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 312 | srvc->server_host, srvc->server_port, strerror(errno)); |
| 313 | /* FIXME: retry? Timer? Abort? */ |
| 314 | OSMO_ASSERT(0); |
| 315 | } |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 316 | } |
| 317 | |
| 318 | static void srvc_st_reestablish(struct osmo_fsm_inst *fi, uint32_t event, void *data) |
| 319 | { |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 320 | switch (event) { |
Harald Welte | 52cc7db | 2018-09-24 11:51:51 +0200 | [diff] [blame] | 321 | case SRVC_E_TCP_UP: |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 322 | osmo_fsm_inst_state_chg(fi, SRVC_ST_ESTABLISHED, T1_WAIT_CLIENT_CONN_RES, 1); |
| 323 | break; |
Harald Welte | 52cc7db | 2018-09-24 11:51:51 +0200 | [diff] [blame] | 324 | case SRVC_E_TCP_DOWN: |
| 325 | /* wait for normal T2 call-back */ |
| 326 | break; |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 327 | default: |
| 328 | OSMO_ASSERT(0); |
| 329 | } |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 330 | } |
| 331 | |
Harald Welte | d2192e2 | 2019-11-07 18:10:57 +0100 | [diff] [blame] | 332 | static void srvc_allstate_action(struct osmo_fsm_inst *fi, uint32_t event, void *data) |
| 333 | { |
Harald Welte | 16c81ea | 2020-02-16 14:44:00 +0100 | [diff] [blame] | 334 | struct rspro_server_conn *srvc = (struct rspro_server_conn *) fi->priv; |
| 335 | |
Harald Welte | d2192e2 | 2019-11-07 18:10:57 +0100 | [diff] [blame] | 336 | switch (event) { |
| 337 | case SRVC_E_ESTABLISH: |
| 338 | osmo_fsm_inst_state_chg(fi, SRVC_ST_REESTABLISH, T2_RECONNECT, 2); |
| 339 | break; |
Harald Welte | 16c81ea | 2020-02-16 14:44:00 +0100 | [diff] [blame] | 340 | case SRVC_E_DISCONNECT: |
| 341 | if (srvc->keepalive_fi) { |
| 342 | ipa_keepalive_fsm_stop(srvc->keepalive_fi); |
| 343 | osmo_fsm_inst_term(srvc->keepalive_fi, OSMO_FSM_TERM_REGULAR, NULL); |
| 344 | srvc->keepalive_fi = NULL; |
| 345 | } |
| 346 | if (srvc->conn) { |
| 347 | LOGPFSML(fi, LOGL_INFO, "Destroying existing connection to server\n"); |
| 348 | ipa_client_conn_close(srvc->conn); |
| 349 | ipa_client_conn_destroy(srvc->conn); |
| 350 | srvc->conn = NULL; |
| 351 | } |
| 352 | osmo_fsm_inst_state_chg(fi, SRVC_ST_INIT, 0, 0); |
| 353 | break; |
Harald Welte | d2192e2 | 2019-11-07 18:10:57 +0100 | [diff] [blame] | 354 | default: |
| 355 | OSMO_ASSERT(0); |
| 356 | } |
| 357 | } |
| 358 | |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 359 | static int server_conn_fsm_timer_cb(struct osmo_fsm_inst *fi) |
| 360 | { |
Harald Welte | a025e70 | 2019-03-09 21:39:09 +0100 | [diff] [blame] | 361 | struct rspro_server_conn *srvc = (struct rspro_server_conn *) fi->priv; |
| 362 | |
Harald Welte | 52cc7db | 2018-09-24 11:51:51 +0200 | [diff] [blame] | 363 | switch (fi->T) { |
| 364 | case 2: |
Harald Welte | d2192e2 | 2019-11-07 18:10:57 +0100 | [diff] [blame] | 365 | /* TCP reconnect failed: retry */ |
Harald Welte | 52cc7db | 2018-09-24 11:51:51 +0200 | [diff] [blame] | 366 | osmo_fsm_inst_state_chg(fi, SRVC_ST_REESTABLISH, T2_RECONNECT, 2); |
| 367 | break; |
| 368 | case 1: |
Harald Welte | d2192e2 | 2019-11-07 18:10:57 +0100 | [diff] [blame] | 369 | /* no ClientConnectRes received: disconnect + reconnect */ |
Harald Welte | a025e70 | 2019-03-09 21:39:09 +0100 | [diff] [blame] | 370 | ipa_client_conn_close(srvc->conn); |
| 371 | osmo_fsm_inst_dispatch(fi, SRVC_E_TCP_DOWN, NULL); |
Harald Welte | 52cc7db | 2018-09-24 11:51:51 +0200 | [diff] [blame] | 372 | break; |
| 373 | default: |
| 374 | OSMO_ASSERT(0); |
| 375 | } |
| 376 | |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 377 | return 0; |
| 378 | } |
| 379 | |
| 380 | static const struct osmo_fsm_state server_conn_fsm_states[] = { |
| 381 | [SRVC_ST_INIT] = { |
| 382 | .name = "INIT", |
Harald Welte | d2192e2 | 2019-11-07 18:10:57 +0100 | [diff] [blame] | 383 | .in_event_mask = 0, /* S(SRVC_E_ESTABLISH) via allstate */ |
| 384 | .out_state_mask = S(SRVC_ST_REESTABLISH), |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 385 | .action = srvc_st_init, |
| 386 | }, |
| 387 | [SRVC_ST_ESTABLISHED] = { |
| 388 | .name = "ESTABLISHED", |
Harald Welte | 03b2411 | 2019-03-08 19:43:02 +0100 | [diff] [blame] | 389 | .in_event_mask = S(SRVC_E_TCP_DOWN) | S(SRVC_E_KA_TIMEOUT) | S(SRVC_E_CLIENT_CONN_RES), |
Harald Welte | 16c81ea | 2020-02-16 14:44:00 +0100 | [diff] [blame] | 390 | .out_state_mask = S(SRVC_ST_CONNECTED) | S(SRVC_ST_REESTABLISH) | S(SRVC_ST_INIT), |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 391 | .action = srvc_st_established, |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 392 | .onenter = srvc_st_established_onenter, |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 393 | }, |
| 394 | [SRVC_ST_CONNECTED] = { |
| 395 | .name = "CONNECTED", |
Harald Welte | a3b14d1 | 2019-12-02 22:58:34 +0100 | [diff] [blame] | 396 | .in_event_mask = S(SRVC_E_TCP_DOWN) | S(SRVC_E_KA_TIMEOUT) | S(SRVC_E_RSPRO_TX), |
Harald Welte | 16c81ea | 2020-02-16 14:44:00 +0100 | [diff] [blame] | 397 | .out_state_mask = S(SRVC_ST_REESTABLISH) | S(SRVC_ST_INIT), |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 398 | .action = srvc_st_connected, |
| 399 | }, |
| 400 | [SRVC_ST_REESTABLISH] = { |
| 401 | .name = "REESTABLISH", |
Harald Welte | 52cc7db | 2018-09-24 11:51:51 +0200 | [diff] [blame] | 402 | .in_event_mask = S(SRVC_E_TCP_UP) | S(SRVC_E_TCP_DOWN), |
Harald Welte | 16c81ea | 2020-02-16 14:44:00 +0100 | [diff] [blame] | 403 | .out_state_mask = S(SRVC_ST_ESTABLISHED) | S(SRVC_ST_REESTABLISH) | S(SRVC_ST_INIT), |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 404 | .action = srvc_st_reestablish, |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 405 | .onenter = srvc_st_reestablish_onenter, |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 406 | }, |
| 407 | }; |
| 408 | |
Harald Welte | 3cded63 | 2019-03-09 12:59:41 +0100 | [diff] [blame] | 409 | struct osmo_fsm rspro_client_server_fsm = { |
| 410 | .name = "RSPRO_CLIENT", |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 411 | .states = server_conn_fsm_states, |
| 412 | .num_states = ARRAY_SIZE(server_conn_fsm_states), |
Harald Welte | 16c81ea | 2020-02-16 14:44:00 +0100 | [diff] [blame] | 413 | .allstate_event_mask = S(SRVC_E_ESTABLISH) | S(SRVC_E_DISCONNECT), |
Harald Welte | d2192e2 | 2019-11-07 18:10:57 +0100 | [diff] [blame] | 414 | .allstate_action = srvc_allstate_action, |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 415 | .timer_cb = server_conn_fsm_timer_cb, |
| 416 | .log_subsys = DMAIN, |
| 417 | .event_names = server_conn_fsm_event_names, |
| 418 | }; |
| 419 | |
Harald Welte | 098ef87 | 2018-10-14 20:08:50 +0200 | [diff] [blame] | 420 | int server_conn_fsm_alloc(void *ctx, struct rspro_server_conn *srvc) |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 421 | { |
| 422 | struct osmo_fsm_inst *fi; |
| 423 | |
Harald Welte | 3cded63 | 2019-03-09 12:59:41 +0100 | [diff] [blame] | 424 | 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] | 425 | if (!fi) |
| 426 | return -1; |
| 427 | |
Harald Welte | 84ba234 | 2018-08-24 22:20:20 +0200 | [diff] [blame] | 428 | srvc->fi = fi; |
Harald Welte | 24173fb | 2018-08-24 20:37:28 +0200 | [diff] [blame] | 429 | return 0; |
| 430 | } |
Harald Welte | 7fc64bc | 2019-03-02 12:55:59 +0100 | [diff] [blame] | 431 | |
| 432 | static __attribute__((constructor)) void on_dso_load(void) |
| 433 | { |
Harald Welte | 4ccd2fc | 2019-12-01 13:32:54 +0100 | [diff] [blame] | 434 | OSMO_ASSERT(osmo_fsm_register(&rspro_client_server_fsm) == 0); |
Harald Welte | 7fc64bc | 2019-03-02 12:55:59 +0100 | [diff] [blame] | 435 | } |