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 | |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 22 | static RsproPDU_t *slotmap2CreateMappingReq(const struct slot_mapping *slotmap) |
| 23 | { |
| 24 | ClientSlot_t clslot; |
| 25 | BankSlot_t bslot; |
| 26 | |
| 27 | client_slot2rspro(&clslot, &slotmap->client); |
| 28 | bank_slot2rspro(&bslot, &slotmap->bank); |
| 29 | |
| 30 | return rspro_gen_CreateMappingReq(&clslot, &bslot); |
| 31 | } |
| 32 | |
| 33 | static RsproPDU_t *slotmap2RemoveMappingReq(const struct slot_mapping *slotmap) |
| 34 | { |
| 35 | ClientSlot_t clslot; |
| 36 | BankSlot_t bslot; |
| 37 | |
| 38 | client_slot2rspro(&clslot, &slotmap->client); |
| 39 | bank_slot2rspro(&bslot, &slotmap->bank); |
| 40 | |
| 41 | return rspro_gen_RemoveMappingReq(&clslot, &bslot); |
| 42 | } |
| 43 | |
| 44 | |
| 45 | static void client_conn_send(struct rspro_client_conn *conn, RsproPDU_t *pdu) |
| 46 | { |
Harald Welte | a8b86ce | 2019-03-31 14:59:20 +0200 | [diff] [blame] | 47 | if (!pdu) { |
| 48 | LOGPFSML(conn->fi, LOGL_ERROR, "Attempt to transmit NULL\n"); |
| 49 | osmo_log_backtrace(DMAIN, LOGL_ERROR); |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 50 | return; |
| 51 | } |
Harald Welte | 15e8b7f | 2022-04-27 09:24:21 +0200 | [diff] [blame] | 52 | LOGPFSML(conn->fi, LOGL_DEBUG, "Tx RSPRO %s\n", rspro_msgt_name(pdu)); |
Harald Welte | a8b86ce | 2019-03-31 14:59:20 +0200 | [diff] [blame] | 53 | |
| 54 | struct msgb *msg_tx = rspro_enc_msg(pdu); |
| 55 | if (!msg_tx) { |
| 56 | LOGPFSML(conn->fi, LOGL_ERROR, "Error encdoing RSPRO %s\n", rspro_msgt_name(pdu)); |
| 57 | osmo_log_backtrace(DMAIN, LOGL_ERROR); |
| 58 | ASN_STRUCT_FREE(asn_DEF_RsproPDU, pdu); |
| 59 | return; |
| 60 | } |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 61 | ipa_prepend_header_ext(msg_tx, IPAC_PROTO_EXT_RSPRO); |
| 62 | ipa_msg_push_header(msg_tx, IPAC_PROTO_OSMO); |
| 63 | ipa_server_conn_send(conn->peer, msg_tx); |
| 64 | } |
| 65 | |
| 66 | |
| 67 | /*********************************************************************** |
| 68 | * per-client connection FSM |
| 69 | ***********************************************************************/ |
| 70 | |
| 71 | static void rspro_client_conn_destroy(struct rspro_client_conn *conn); |
| 72 | |
| 73 | enum remsim_server_client_fsm_state { |
| 74 | CLNTC_ST_INIT, |
| 75 | CLNTC_ST_ESTABLISHED, |
Harald Welte | e5c7773 | 2019-03-07 23:58:24 +0100 | [diff] [blame] | 76 | CLNTC_ST_WAIT_CONF_RES, /* waiting for ConfigClientRes */ |
Harald Welte | 0a64da6 | 2019-03-30 17:38:04 +0100 | [diff] [blame] | 77 | CLNTC_ST_CONNECTED_BANKD, |
| 78 | CLNTC_ST_CONNECTED_CLIENT, |
Harald Welte | 6500658 | 2022-05-03 16:22:37 +0200 | [diff] [blame] | 79 | CLNTC_ST_REJECTED, |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 80 | }; |
| 81 | |
| 82 | enum remsim_server_client_event { |
| 83 | CLNTC_E_TCP_UP, |
| 84 | CLNTC_E_CLIENT_CONN, /* Connect{Client,Bank}Req received */ |
| 85 | CLNTC_E_BANK_CONN, |
| 86 | CLNTC_E_TCP_DOWN, |
Harald Welte | 15b75e1 | 2019-03-08 16:55:46 +0100 | [diff] [blame] | 87 | CLNTC_E_KA_TIMEOUT, |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 88 | CLNTC_E_CREATE_MAP_RES, /* CreateMappingRes received */ |
| 89 | CLNTC_E_REMOVE_MAP_RES, /* RemoveMappingRes received */ |
Harald Welte | e5c7773 | 2019-03-07 23:58:24 +0100 | [diff] [blame] | 90 | CLNTC_E_CONFIG_CL_RES, /* ConfigClientRes received */ |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 91 | CLNTC_E_PUSH, /* drain maps_new or maps_delreq */ |
Harald Welte | 4c37f66 | 2019-03-31 15:00:00 +0200 | [diff] [blame] | 92 | CLNTC_E_CL_CFG_BANKD, /* send [new] ConfigConfigBankReq */ |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 93 | }; |
| 94 | |
| 95 | static const struct value_string server_client_event_names[] = { |
| 96 | OSMO_VALUE_STRING(CLNTC_E_TCP_UP), |
| 97 | OSMO_VALUE_STRING(CLNTC_E_CLIENT_CONN), |
| 98 | OSMO_VALUE_STRING(CLNTC_E_BANK_CONN), |
| 99 | OSMO_VALUE_STRING(CLNTC_E_TCP_DOWN), |
Harald Welte | 15b75e1 | 2019-03-08 16:55:46 +0100 | [diff] [blame] | 100 | OSMO_VALUE_STRING(CLNTC_E_KA_TIMEOUT), |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 101 | OSMO_VALUE_STRING(CLNTC_E_CREATE_MAP_RES), |
| 102 | OSMO_VALUE_STRING(CLNTC_E_REMOVE_MAP_RES), |
Harald Welte | e5c7773 | 2019-03-07 23:58:24 +0100 | [diff] [blame] | 103 | OSMO_VALUE_STRING(CLNTC_E_CONFIG_CL_RES), |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 104 | OSMO_VALUE_STRING(CLNTC_E_PUSH), |
Harald Welte | 4c37f66 | 2019-03-31 15:00:00 +0200 | [diff] [blame] | 105 | OSMO_VALUE_STRING(CLNTC_E_CL_CFG_BANKD), |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 106 | { 0, NULL } |
| 107 | }; |
| 108 | |
| 109 | static void clnt_st_init(struct osmo_fsm_inst *fi, uint32_t event, void *data) |
| 110 | { |
| 111 | switch (event) { |
| 112 | case CLNTC_E_TCP_UP: |
| 113 | osmo_fsm_inst_state_chg(fi, CLNTC_ST_ESTABLISHED, 10, 1); |
| 114 | break; |
| 115 | default: |
| 116 | OSMO_ASSERT(0); |
| 117 | } |
| 118 | } |
| 119 | |
| 120 | static void clnt_st_established(struct osmo_fsm_inst *fi, uint32_t event, void *data) |
| 121 | { |
| 122 | struct rspro_client_conn *conn = fi->priv; |
Harald Welte | 6500658 | 2022-05-03 16:22:37 +0200 | [diff] [blame] | 123 | struct rspro_client_conn *previous_conn; |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 124 | const RsproPDU_t *pdu = data; |
| 125 | const ConnectClientReq_t *cclreq = NULL; |
| 126 | const ConnectBankReq_t *cbreq = NULL; |
| 127 | RsproPDU_t *resp = NULL; |
Harald Welte | fb48de8 | 2022-04-27 09:15:43 +0200 | [diff] [blame] | 128 | char ip_str[INET6_ADDRSTRLEN]; |
| 129 | char port_str[6]; |
| 130 | |
| 131 | /* remote IP and port */ |
| 132 | osmo_sock_get_ip_and_port(conn->peer->ofd.fd, ip_str, sizeof(ip_str), |
| 133 | port_str, sizeof(port_str), false); |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 134 | |
| 135 | switch (event) { |
| 136 | case CLNTC_E_CLIENT_CONN: |
| 137 | cclreq = &pdu->msg.choice.connectClientReq; |
| 138 | /* save the [remote] component identity in 'conn' */ |
| 139 | rspro_comp_id_retrieve(&conn->comp_id, &cclreq->identity); |
| 140 | if (conn->comp_id.type != ComponentType_remsimClient) { |
Harald Welte | 15e8b7f | 2022-04-27 09:24:21 +0200 | [diff] [blame] | 141 | LOGPFSML(fi, LOGL_ERROR, "ConnectClientReq from identity != Client ?!?\n"); |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 142 | osmo_fsm_inst_term(fi, OSMO_FSM_TERM_ERROR, NULL); |
Harald Welte | 900ee72 | 2022-05-03 16:22:21 +0200 | [diff] [blame] | 143 | return; |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 144 | } |
Harald Welte | 4c37f66 | 2019-03-31 15:00:00 +0200 | [diff] [blame] | 145 | |
Harald Welte | 4c37f66 | 2019-03-31 15:00:00 +0200 | [diff] [blame] | 146 | |
Harald Welte | e5c7773 | 2019-03-07 23:58:24 +0100 | [diff] [blame] | 147 | if (!cclreq->clientSlot) { |
| 148 | #if 0 |
| 149 | /* FIXME: determine ClientID */ |
| 150 | resp = rspro_gen_ConnectClientRes(&conn->srv->comp_id, ResultCode_ok); |
| 151 | client_conn_send(conn, resp); |
| 152 | osmo_fsm_inst_state_chg(fi, CLNTC_ST_WAIT_CL_CONF_RES, 3, 30); |
| 153 | #else |
| 154 | /* FIXME: the original plan was to dynamically assign a ClientID |
| 155 | * from server to client here. Send ConfigReq and transition to |
| 156 | * CLNTC_ST_WAIT_CONF_RES */ |
Harald Welte | 15e8b7f | 2022-04-27 09:24:21 +0200 | [diff] [blame] | 157 | LOGPFSML(fi, LOGL_ERROR, "ConnectClientReq without ClientId not supported yet!\n"); |
Harald Welte | e5c7773 | 2019-03-07 23:58:24 +0100 | [diff] [blame] | 158 | osmo_fsm_inst_term(fi, OSMO_FSM_TERM_ERROR, NULL); |
| 159 | #endif |
| 160 | } else { |
Harald Welte | e5c7773 | 2019-03-07 23:58:24 +0100 | [diff] [blame] | 161 | rspro2client_slot(&conn->client.slot, cclreq->clientSlot); |
| 162 | osmo_fsm_inst_update_id_f(fi, "C%u:%u", conn->client.slot.client_id, |
| 163 | conn->client.slot.slot_nr); |
Harald Welte | 1c691b1 | 2019-03-31 10:58:11 +0200 | [diff] [blame] | 164 | osmo_fsm_inst_update_id_f(conn->keepalive_fi, "C%u:%u", |
| 165 | conn->client.slot.client_id, |
| 166 | conn->client.slot.slot_nr); |
Harald Welte | fb48de8 | 2022-04-27 09:15:43 +0200 | [diff] [blame] | 167 | LOGPFSML(fi, LOGL_INFO, "Client connected from %s:%s\n", ip_str, port_str); |
Harald Welte | 6500658 | 2022-05-03 16:22:37 +0200 | [diff] [blame] | 168 | |
| 169 | /* check for unique-ness */ |
| 170 | previous_conn = client_conn_by_slot(conn->srv, &conn->client.slot); |
| 171 | if (previous_conn && previous_conn != conn) { |
| 172 | /* we're dropping the current (new) connection as we don't really know which |
| 173 | * is the "right" one. Dropping the new gives the old connection time to |
| 174 | * timeout, or to continue to operate. If we were to drop the old |
| 175 | * connection, this could interrupt a perfectly working connection and opens |
| 176 | * some kind of DoS. */ |
| 177 | LOGPFSML(fi, LOGL_ERROR, "New client connection from %s:%s, but we already " |
| 178 | "have a connection from %s:%u. Dropping new connection.\n", |
| 179 | ip_str, port_str, previous_conn->peer->addr, previous_conn->peer->port); |
| 180 | resp = rspro_gen_ConnectClientRes(&conn->srv->comp_id, ResultCode_identityInUse); |
| 181 | client_conn_send(conn, resp); |
| 182 | osmo_fsm_inst_state_chg(fi, CLNTC_ST_REJECTED, 1, 2); |
| 183 | return; |
| 184 | } |
| 185 | |
| 186 | /* reparent us from srv->connections to srv->clients */ |
| 187 | pthread_rwlock_wrlock(&conn->srv->rwlock); |
| 188 | llist_del(&conn->list); |
| 189 | llist_add_tail(&conn->list, &conn->srv->clients); |
| 190 | pthread_rwlock_unlock(&conn->srv->rwlock); |
| 191 | |
Harald Welte | e5c7773 | 2019-03-07 23:58:24 +0100 | [diff] [blame] | 192 | resp = rspro_gen_ConnectClientRes(&conn->srv->comp_id, ResultCode_ok); |
| 193 | client_conn_send(conn, resp); |
Harald Welte | 0a64da6 | 2019-03-30 17:38:04 +0100 | [diff] [blame] | 194 | osmo_fsm_inst_state_chg(fi, CLNTC_ST_CONNECTED_CLIENT, 0, 0); |
Harald Welte | e5c7773 | 2019-03-07 23:58:24 +0100 | [diff] [blame] | 195 | } |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 196 | break; |
| 197 | case CLNTC_E_BANK_CONN: |
| 198 | cbreq = &pdu->msg.choice.connectBankReq; |
| 199 | /* save the [remote] component identity in 'conn' */ |
| 200 | rspro_comp_id_retrieve(&conn->comp_id, &cbreq->identity); |
| 201 | if (conn->comp_id.type != ComponentType_remsimBankd) { |
Harald Welte | 15e8b7f | 2022-04-27 09:24:21 +0200 | [diff] [blame] | 202 | LOGPFSML(fi, LOGL_ERROR, "ConnectBankReq from identity != Bank ?!?\n"); |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 203 | osmo_fsm_inst_term(fi, OSMO_FSM_TERM_ERROR, NULL); |
Harald Welte | 900ee72 | 2022-05-03 16:22:21 +0200 | [diff] [blame] | 204 | return; |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 205 | } |
| 206 | conn->bank.bank_id = cbreq->bankId; |
| 207 | conn->bank.num_slots = cbreq->numberOfSlots; |
| 208 | osmo_fsm_inst_update_id_f(fi, "B%u", conn->bank.bank_id); |
Harald Welte | 1c691b1 | 2019-03-31 10:58:11 +0200 | [diff] [blame] | 209 | osmo_fsm_inst_update_id_f(conn->keepalive_fi, "B%u", conn->bank.bank_id); |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 210 | |
Harald Welte | fb48de8 | 2022-04-27 09:15:43 +0200 | [diff] [blame] | 211 | LOGPFSML(fi, LOGL_INFO, "Bankd connected from %s:%s\n", ip_str, port_str); |
| 212 | if (!strncmp(ip_str, "127.", 4)) { |
| 213 | LOGPFSML(fi, LOGL_NOTICE, "Bankd connected from %s (localhost). " |
| 214 | "This only works if your clients also all are on localhost, " |
| 215 | "as they must be able to reach the bankd!\n", ip_str); |
| 216 | } |
| 217 | |
Harald Welte | 6500658 | 2022-05-03 16:22:37 +0200 | [diff] [blame] | 218 | /* check for unique-ness */ |
| 219 | previous_conn = bankd_conn_by_id(conn->srv, conn->bank.bank_id); |
| 220 | if (previous_conn && previous_conn != conn) { |
| 221 | /* we're dropping the current (new) connection as we don't really know which |
| 222 | * is the "right" one. Dropping the new gives the old connection time to |
| 223 | * timeout, or to continue to operate. If we were to drop the old |
| 224 | * connection, this could interrupt a perfectly working connection and opens |
| 225 | * some kind of DoS. */ |
| 226 | LOGPFSML(fi, LOGL_ERROR, "New bankd connection from %s:%s, but we already " |
| 227 | "have a connection from %s:%u. Dropping new connection.\n", |
| 228 | ip_str, port_str, previous_conn->peer->addr, previous_conn->peer->port); |
| 229 | resp = rspro_gen_ConnectBankRes(&conn->srv->comp_id, ResultCode_identityInUse); |
| 230 | client_conn_send(conn, resp); |
| 231 | osmo_fsm_inst_state_chg(fi, CLNTC_ST_REJECTED, 1, 2); |
| 232 | return; |
| 233 | } |
| 234 | |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 235 | /* reparent us from srv->connections to srv->banks */ |
| 236 | pthread_rwlock_wrlock(&conn->srv->rwlock); |
| 237 | llist_del(&conn->list); |
| 238 | llist_add_tail(&conn->list, &conn->srv->banks); |
| 239 | pthread_rwlock_unlock(&conn->srv->rwlock); |
| 240 | |
| 241 | /* send response to bank first */ |
| 242 | resp = rspro_gen_ConnectBankRes(&conn->srv->comp_id, ResultCode_ok); |
| 243 | client_conn_send(conn, resp); |
| 244 | |
| 245 | /* the state change will associate any pre-existing slotmaps */ |
Harald Welte | 0a64da6 | 2019-03-30 17:38:04 +0100 | [diff] [blame] | 246 | osmo_fsm_inst_state_chg(fi, CLNTC_ST_CONNECTED_BANKD, 0, 0); |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 247 | |
| 248 | osmo_fsm_inst_dispatch(fi, CLNTC_E_PUSH, NULL); |
| 249 | break; |
| 250 | default: |
| 251 | OSMO_ASSERT(0); |
| 252 | } |
| 253 | } |
| 254 | |
Harald Welte | e5c7773 | 2019-03-07 23:58:24 +0100 | [diff] [blame] | 255 | static void clnt_st_wait_cl_conf_res(struct osmo_fsm_inst *fi, uint32_t event, void *data) |
| 256 | { |
| 257 | switch (event) { |
| 258 | case CLNTC_E_CONFIG_CL_RES: |
Harald Welte | 0a64da6 | 2019-03-30 17:38:04 +0100 | [diff] [blame] | 259 | osmo_fsm_inst_state_chg(fi, CLNTC_ST_CONNECTED_CLIENT, 0, 0); |
Harald Welte | e5c7773 | 2019-03-07 23:58:24 +0100 | [diff] [blame] | 260 | break; |
| 261 | default: |
| 262 | OSMO_ASSERT(0); |
| 263 | } |
| 264 | } |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 265 | |
Harald Welte | 4c37f66 | 2019-03-31 15:00:00 +0200 | [diff] [blame] | 266 | /*! find a connected client (if any) for given slotmap and update its Bankd configuration. |
| 267 | * \param[in] map slotmap whose client connection shall be updated |
| 268 | * \param[in] srv rspro_server on which we operate |
| 269 | * \param[in] bankd_conn bankd connection serving the map (may be NULL if not known) |
| 270 | */ |
| 271 | static void _update_client_for_slotmap(struct slot_mapping *map, struct rspro_server *srv, |
| 272 | struct rspro_client_conn *bankd_conn) |
| 273 | { |
Harald Welte | ea3eefe | 2020-02-16 15:26:35 +0100 | [diff] [blame] | 274 | struct rspro_client_conn *conn; |
Harald Welte | 4c37f66 | 2019-03-31 15:00:00 +0200 | [diff] [blame] | 275 | char ip_str[INET6_ADDRSTRLEN]; |
| 276 | char port_str[6]; |
| 277 | uint32_t bankd_ip; |
| 278 | int bankd_port; |
| 279 | bool changed = false; |
| 280 | int rc; |
| 281 | |
| 282 | OSMO_ASSERT(map); |
| 283 | OSMO_ASSERT(srv); |
| 284 | |
Harald Welte | ea3eefe | 2020-02-16 15:26:35 +0100 | [diff] [blame] | 285 | conn = client_conn_by_slot(srv, &map->client); |
Harald Welte | 4c37f66 | 2019-03-31 15:00:00 +0200 | [diff] [blame] | 286 | if (!conn) |
| 287 | LOGP(DMAIN, LOGL_DEBUG, "%s\n", __func__); |
| 288 | else |
Harald Welte | 15e8b7f | 2022-04-27 09:24:21 +0200 | [diff] [blame] | 289 | LOGPFSML(conn->fi, LOGL_DEBUG, "%s\n", __func__); |
Harald Welte | 4c37f66 | 2019-03-31 15:00:00 +0200 | [diff] [blame] | 290 | |
| 291 | if (!conn) |
| 292 | return; |
| 293 | |
| 294 | if (!bank_slot_equals(&conn->client.bankd.slot, &map->bank)) { |
Harald Welte | 15e8b7f | 2022-04-27 09:24:21 +0200 | [diff] [blame] | 295 | LOGPFSML(conn->fi, LOGL_NOTICE, "BankSlot has changed B%u:%u -> B%u:%u\n", |
Harald Welte | 4c37f66 | 2019-03-31 15:00:00 +0200 | [diff] [blame] | 296 | conn->client.bankd.slot.bank_id, conn->client.bankd.slot.slot_nr, |
| 297 | map->bank.bank_id, map->bank.slot_nr); |
| 298 | conn->client.bankd.slot = map->bank; |
| 299 | changed = true; |
| 300 | } |
| 301 | |
| 302 | /* if caller didn't provide bankd_conn, resolve it from map */ |
| 303 | if (!bankd_conn) |
| 304 | bankd_conn = bankd_conn_by_id(srv, map->bank.bank_id); |
Harald Welte | 3598c58 | 2020-02-16 15:30:38 +0100 | [diff] [blame] | 305 | if (map->state == SLMAP_S_DELETING || !bankd_conn) { |
| 306 | bankd_ip = 0; |
| 307 | bankd_port = 0; |
| 308 | } else { |
| 309 | /* obtain IP and port of bankd */ |
| 310 | rc = osmo_sock_get_ip_and_port(bankd_conn->peer->ofd.fd, ip_str, sizeof(ip_str), |
| 311 | port_str, sizeof(port_str), false); |
| 312 | if (rc < 0) { |
Harald Welte | 15e8b7f | 2022-04-27 09:24:21 +0200 | [diff] [blame] | 313 | LOGPFSML(bankd_conn->fi, LOGL_ERROR, "Error during getpeername\n"); |
Harald Welte | 3598c58 | 2020-02-16 15:30:38 +0100 | [diff] [blame] | 314 | return; |
| 315 | } |
| 316 | bankd_ip = ntohl(inet_addr(ip_str)); |
| 317 | bankd_port = 9999; /* TODO: configurable */ |
Harald Welte | 4c37f66 | 2019-03-31 15:00:00 +0200 | [diff] [blame] | 318 | } |
Harald Welte | 3598c58 | 2020-02-16 15:30:38 +0100 | [diff] [blame] | 319 | |
| 320 | /* determine if IP/port of bankd have changed */ |
Harald Welte | 4c37f66 | 2019-03-31 15:00:00 +0200 | [diff] [blame] | 321 | if (conn->client.bankd.port != bankd_port || conn->client.bankd.ip != bankd_ip) { |
Harald Welte | 3598c58 | 2020-02-16 15:30:38 +0100 | [diff] [blame] | 322 | struct in_addr ia = { .s_addr = bankd_ip }; |
Harald Welte | 15e8b7f | 2022-04-27 09:24:21 +0200 | [diff] [blame] | 323 | LOGPFSML(conn->fi, LOGL_NOTICE, "Bankd IP/Port changed to %s:%u\n", inet_ntoa(ia), bankd_port); |
Harald Welte | 4c37f66 | 2019-03-31 15:00:00 +0200 | [diff] [blame] | 324 | conn->client.bankd.ip = bankd_ip; |
| 325 | conn->client.bankd.port = bankd_port; |
| 326 | changed = true; |
| 327 | } |
| 328 | |
| 329 | /* update the client with new bankd information, if any changes were made */ |
| 330 | if (changed) |
| 331 | osmo_fsm_inst_dispatch(conn->fi, CLNTC_E_CL_CFG_BANKD, NULL); |
| 332 | } |
| 333 | |
Harald Welte | 0a64da6 | 2019-03-30 17:38:04 +0100 | [diff] [blame] | 334 | static void clnt_st_connected_client_onenter(struct osmo_fsm_inst *fi, uint32_t prev_state) |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 335 | { |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 336 | struct rspro_client_conn *conn = fi->priv; |
Harald Welte | 4c37f66 | 2019-03-31 15:00:00 +0200 | [diff] [blame] | 337 | struct slotmaps *slotmaps = conn->srv->slotmaps; |
| 338 | struct slot_mapping *map; |
| 339 | |
Harald Welte | 15e8b7f | 2022-04-27 09:24:21 +0200 | [diff] [blame] | 340 | LOGPFSML(fi, LOGL_DEBUG, "%s\n", __func__); |
Harald Welte | 4c37f66 | 2019-03-31 15:00:00 +0200 | [diff] [blame] | 341 | |
| 342 | /* check for an existing slotmap for this client/slot */ |
| 343 | slotmaps_rdlock(slotmaps); |
| 344 | llist_for_each_entry(map, &slotmaps->mappings, list) { |
| 345 | if (client_slot_equals(&map->client, &conn->client.slot)) { |
| 346 | _update_client_for_slotmap(map, conn->srv, NULL); |
| 347 | break; |
| 348 | } |
| 349 | } |
| 350 | slotmaps_unlock(slotmaps); |
| 351 | #if 0 |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 352 | ClientSlot_t clslot; |
| 353 | RsproPDU_t *pdu; |
| 354 | |
| 355 | /* send configuration to this new client */ |
| 356 | client_slot2rspro(&clslot, FIXME); |
| 357 | pdu = rspro_gen_ConfigClientReq(&clslot, bankd_ip, bankd_port); |
| 358 | client_conn_send(conn, pdu); |
| 359 | #endif |
| 360 | } |
| 361 | |
Harald Welte | 0a64da6 | 2019-03-30 17:38:04 +0100 | [diff] [blame] | 362 | static void clnt_st_connected_bankd_onenter(struct osmo_fsm_inst *fi, uint32_t prev_state) |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 363 | { |
| 364 | struct rspro_client_conn *conn = fi->priv; |
| 365 | struct slotmaps *slotmaps = conn->srv->slotmaps; |
| 366 | struct slot_mapping *map; |
| 367 | |
Harald Welte | 15e8b7f | 2022-04-27 09:24:21 +0200 | [diff] [blame] | 368 | LOGPFSML(fi, LOGL_DEBUG, "Associating pre-existing slotmaps (if any)\n"); |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 369 | /* Link all known mappings to this new bank */ |
| 370 | slotmaps_wrlock(slotmaps); |
| 371 | llist_for_each_entry(map, &slotmaps->mappings, list) { |
| 372 | if (map->bank.bank_id == conn->bank.bank_id) |
| 373 | _slotmap_state_change(map, SLMAP_S_NEW, &conn->bank.maps_new); |
| 374 | } |
| 375 | slotmaps_unlock(slotmaps); |
| 376 | } |
| 377 | |
Harald Welte | 0a64da6 | 2019-03-30 17:38:04 +0100 | [diff] [blame] | 378 | static void clnt_st_connected_client(struct osmo_fsm_inst *fi, uint32_t event, void *data) |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 379 | { |
| 380 | struct rspro_client_conn *conn = fi->priv; |
Harald Welte | 4c37f66 | 2019-03-31 15:00:00 +0200 | [diff] [blame] | 381 | BankSlot_t bslot; |
| 382 | RsproPDU_t *tx; |
Harald Welte | 0a64da6 | 2019-03-30 17:38:04 +0100 | [diff] [blame] | 383 | |
| 384 | switch (event) { |
Harald Welte | 4c37f66 | 2019-03-31 15:00:00 +0200 | [diff] [blame] | 385 | case CLNTC_E_CL_CFG_BANKD: /* Send [new] Bankd information to client */ |
| 386 | bank_slot2rspro(&bslot, &conn->client.bankd.slot); |
| 387 | tx = rspro_gen_ConfigClientBankReq(&bslot, conn->client.bankd.ip, |
| 388 | conn->client.bankd.port); |
| 389 | client_conn_send(conn, tx); |
| 390 | break; |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 391 | default: |
| 392 | OSMO_ASSERT(0); |
| 393 | } |
| 394 | } |
| 395 | |
Harald Welte | 0a64da6 | 2019-03-30 17:38:04 +0100 | [diff] [blame] | 396 | static void clnt_st_connected_bankd(struct osmo_fsm_inst *fi, uint32_t event, void *data) |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 397 | { |
| 398 | struct rspro_client_conn *conn = fi->priv; |
| 399 | struct slotmaps *slotmaps = conn->srv->slotmaps; |
Harald Welte | 35ded29 | 2019-03-31 15:13:09 +0200 | [diff] [blame] | 400 | const __attribute__((unused)) RsproPDU_t *rx = NULL; |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 401 | struct slot_mapping *map, *map2; |
| 402 | |
| 403 | switch (event) { |
Harald Welte | 1b07f7f | 2019-03-30 17:33:07 +0100 | [diff] [blame] | 404 | case CLNTC_E_CREATE_MAP_RES: /* Bankd acknowledges mapping was created */ |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 405 | rx = data; |
| 406 | slotmaps_wrlock(slotmaps); |
| 407 | /* FIXME: resolve map by pdu->tag */ |
| 408 | /* as hack use first element of conn->maps_unack */ |
| 409 | map = llist_first_entry(&conn->bank.maps_unack, struct slot_mapping, bank_list); |
| 410 | if (!map) { |
| 411 | slotmaps_unlock(slotmaps); |
Harald Welte | 15e8b7f | 2022-04-27 09:24:21 +0200 | [diff] [blame] | 412 | LOGPFSML(fi, LOGL_NOTICE, "CreateMapRes but no unacknowledged map"); |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 413 | break; |
| 414 | } |
| 415 | _slotmap_state_change(map, SLMAP_S_ACTIVE, &conn->bank.maps_active); |
| 416 | slotmaps_unlock(slotmaps); |
Harald Welte | 4c37f66 | 2019-03-31 15:00:00 +0200 | [diff] [blame] | 417 | _update_client_for_slotmap(map, conn->srv, conn); |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 418 | break; |
Harald Welte | 1b07f7f | 2019-03-30 17:33:07 +0100 | [diff] [blame] | 419 | case CLNTC_E_REMOVE_MAP_RES: /* Bankd acknowledges mapping was removed */ |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 420 | rx = data; |
| 421 | slotmaps_wrlock(slotmaps); |
| 422 | /* FIXME: resolve map by pdu->tag */ |
| 423 | /* as hack use first element of conn->maps_deleting */ |
| 424 | map = llist_first_entry(&conn->bank.maps_deleting, struct slot_mapping, bank_list); |
| 425 | if (!map) { |
| 426 | slotmaps_unlock(slotmaps); |
Harald Welte | 15e8b7f | 2022-04-27 09:24:21 +0200 | [diff] [blame] | 427 | LOGPFSML(fi, LOGL_NOTICE, "RemoveMapRes but no unacknowledged map"); |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 428 | break; |
| 429 | } |
| 430 | slotmaps_unlock(slotmaps); |
Harald Welte | 3598c58 | 2020-02-16 15:30:38 +0100 | [diff] [blame] | 431 | /* update client! */ |
| 432 | OSMO_ASSERT(map->state == SLMAP_S_DELETING); |
| 433 | _update_client_for_slotmap(map, conn->srv, conn); |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 434 | /* slotmap_del() will remove it from both global and bank list */ |
| 435 | slotmap_del(map->maps, map); |
| 436 | break; |
Harald Welte | 1b07f7f | 2019-03-30 17:33:07 +0100 | [diff] [blame] | 437 | case CLNTC_E_PUSH: /* check if any create or delete requests are pending */ |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 438 | slotmaps_wrlock(slotmaps); |
| 439 | /* send any pending create requests */ |
| 440 | llist_for_each_entry_safe(map, map2, &conn->bank.maps_new, bank_list) { |
| 441 | RsproPDU_t *pdu = slotmap2CreateMappingReq(map); |
| 442 | client_conn_send(conn, pdu); |
| 443 | _slotmap_state_change(map, SLMAP_S_UNACKNOWLEDGED, &conn->bank.maps_unack); |
| 444 | } |
| 445 | /* send any pending delete requests */ |
| 446 | llist_for_each_entry_safe(map, map2, &conn->bank.maps_delreq, bank_list) { |
| 447 | RsproPDU_t *pdu = slotmap2RemoveMappingReq(map); |
| 448 | client_conn_send(conn, pdu); |
| 449 | _slotmap_state_change(map, SLMAP_S_DELETING, &conn->bank.maps_deleting); |
| 450 | } |
| 451 | slotmaps_unlock(slotmaps); |
| 452 | break; |
| 453 | default: |
| 454 | OSMO_ASSERT(0); |
| 455 | } |
| 456 | } |
| 457 | |
| 458 | static void clnt_allstate_action(struct osmo_fsm_inst *fi, uint32_t event, void *data) |
| 459 | { |
Harald Welte | 35ded29 | 2019-03-31 15:13:09 +0200 | [diff] [blame] | 460 | //struct rspro_client_conn *conn = fi->priv; |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 461 | |
| 462 | switch (event) { |
| 463 | case CLNTC_E_TCP_DOWN: |
Harald Welte | e1590df | 2022-04-27 09:19:48 +0200 | [diff] [blame] | 464 | LOGPFSML(fi, LOGL_NOTICE, "Connection lost; terminating FSM\n"); |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 465 | osmo_fsm_inst_term(fi, OSMO_FSM_TERM_REGULAR, NULL); |
| 466 | break; |
Harald Welte | 15b75e1 | 2019-03-08 16:55:46 +0100 | [diff] [blame] | 467 | case CLNTC_E_KA_TIMEOUT: |
Harald Welte | e1590df | 2022-04-27 09:19:48 +0200 | [diff] [blame] | 468 | LOGPFSML(fi, LOGL_NOTICE, "IPA keep-alive timeout; terminating FSM\n"); |
Harald Welte | 15b75e1 | 2019-03-08 16:55:46 +0100 | [diff] [blame] | 469 | osmo_fsm_inst_term(fi, OSMO_FSM_TERM_REGULAR, NULL); |
| 470 | break; |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 471 | default: |
| 472 | OSMO_ASSERT(0); |
| 473 | } |
| 474 | } |
| 475 | |
| 476 | static int server_client_fsm_timer_cb(struct osmo_fsm_inst *fi) |
| 477 | { |
Harald Welte | 35ded29 | 2019-03-31 15:13:09 +0200 | [diff] [blame] | 478 | //struct rspro_client_conn *conn = fi->priv; |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 479 | |
| 480 | switch (fi->T) { |
| 481 | case 1: |
| 482 | /* No ClientConnectReq received:disconnect */ |
| 483 | return 1; /* ask core to terminate FSM */ |
Harald Welte | 6500658 | 2022-05-03 16:22:37 +0200 | [diff] [blame] | 484 | case 2: |
| 485 | /* Timeout after rejecting client */ |
| 486 | LOGPFSML(fi, LOGL_NOTICE, "Closing connection of rejected peer\n"); |
| 487 | return 1; /* ask core to terminate FSM */ |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 488 | default: |
| 489 | OSMO_ASSERT(0); |
| 490 | } |
| 491 | return 0; |
| 492 | } |
| 493 | |
| 494 | static void server_client_cleanup(struct osmo_fsm_inst *fi, enum osmo_fsm_term_cause cause) |
| 495 | { |
| 496 | struct rspro_client_conn *conn = fi->priv; |
| 497 | /* this call will destroy the IPA connection, which will in turn call closed_cb() |
| 498 | * which will try to deliver a E_TCP_DOWN event. Clear conn->fi to avoid that loop */ |
| 499 | conn->fi = NULL; |
| 500 | rspro_client_conn_destroy(conn); |
| 501 | } |
| 502 | |
| 503 | static const struct osmo_fsm_state server_client_fsm_states[] = { |
| 504 | [CLNTC_ST_INIT] = { |
| 505 | .name = "INIT", |
| 506 | .in_event_mask = S(CLNTC_E_TCP_UP), |
| 507 | .out_state_mask = S(CLNTC_ST_ESTABLISHED), |
| 508 | .action = clnt_st_init, |
| 509 | }, |
| 510 | [CLNTC_ST_ESTABLISHED] = { |
| 511 | .name = "ESTABLISHED", |
| 512 | .in_event_mask = S(CLNTC_E_CLIENT_CONN) | S(CLNTC_E_BANK_CONN), |
Harald Welte | 0a64da6 | 2019-03-30 17:38:04 +0100 | [diff] [blame] | 513 | .out_state_mask = S(CLNTC_ST_CONNECTED_CLIENT) | S(CLNTC_ST_WAIT_CONF_RES) | |
Harald Welte | 6500658 | 2022-05-03 16:22:37 +0200 | [diff] [blame] | 514 | S(CLNTC_ST_CONNECTED_BANKD) | S(CLNTC_ST_REJECTED), |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 515 | .action = clnt_st_established, |
| 516 | }, |
Harald Welte | e5c7773 | 2019-03-07 23:58:24 +0100 | [diff] [blame] | 517 | [CLNTC_ST_WAIT_CONF_RES] = { |
| 518 | .name = "WAIT_CONFIG_RES", |
| 519 | .in_event_mask = S(CLNTC_E_CONFIG_CL_RES), |
Harald Welte | 0a64da6 | 2019-03-30 17:38:04 +0100 | [diff] [blame] | 520 | .out_state_mask = S(CLNTC_ST_CONNECTED_CLIENT), |
Harald Welte | e5c7773 | 2019-03-07 23:58:24 +0100 | [diff] [blame] | 521 | .action = clnt_st_wait_cl_conf_res, |
| 522 | }, |
Harald Welte | 0a64da6 | 2019-03-30 17:38:04 +0100 | [diff] [blame] | 523 | [CLNTC_ST_CONNECTED_CLIENT] = { |
| 524 | .name = "CONNECTED_CLIENT", |
Harald Welte | 4c37f66 | 2019-03-31 15:00:00 +0200 | [diff] [blame] | 525 | .in_event_mask = S(CLNTC_E_CL_CFG_BANKD), |
Harald Welte | 0a64da6 | 2019-03-30 17:38:04 +0100 | [diff] [blame] | 526 | .action = clnt_st_connected_client, |
| 527 | .onenter = clnt_st_connected_client_onenter, |
| 528 | }, |
| 529 | [CLNTC_ST_CONNECTED_BANKD] = { |
| 530 | .name = "CONNECTED_BANKD", |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 531 | .in_event_mask = S(CLNTC_E_CREATE_MAP_RES) | S(CLNTC_E_REMOVE_MAP_RES) | |
| 532 | S(CLNTC_E_PUSH), |
Harald Welte | 0a64da6 | 2019-03-30 17:38:04 +0100 | [diff] [blame] | 533 | .action = clnt_st_connected_bankd, |
| 534 | .onenter = clnt_st_connected_bankd_onenter, |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 535 | }, |
Harald Welte | 6500658 | 2022-05-03 16:22:37 +0200 | [diff] [blame] | 536 | [CLNTC_ST_REJECTED] = { |
| 537 | .name = "REJECTED", |
| 538 | /* no events permitted, no action required */ |
| 539 | } |
Harald Welte | 0a64da6 | 2019-03-30 17:38:04 +0100 | [diff] [blame] | 540 | |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 541 | }; |
| 542 | |
| 543 | static struct osmo_fsm remsim_server_client_fsm = { |
| 544 | .name = "SERVER_CONN", |
| 545 | .states = server_client_fsm_states, |
| 546 | .num_states = ARRAY_SIZE(server_client_fsm_states), |
Harald Welte | 10f7a76 | 2019-03-31 12:38:47 +0200 | [diff] [blame] | 547 | .allstate_event_mask = S(CLNTC_E_TCP_DOWN) | S(CLNTC_E_KA_TIMEOUT), |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 548 | .allstate_action = clnt_allstate_action, |
| 549 | .cleanup = server_client_cleanup, |
| 550 | .timer_cb = server_client_fsm_timer_cb, |
| 551 | .log_subsys = DMAIN, |
| 552 | .event_names = server_client_event_names, |
| 553 | }; |
| 554 | |
| 555 | struct osmo_fsm_inst *server_client_fsm_alloc(void *ctx, struct rspro_client_conn *conn) |
| 556 | { |
| 557 | //const char *id = osmo_sock_get_name2(conn->peer->ofd.fd); |
| 558 | return osmo_fsm_inst_alloc(&remsim_server_client_fsm, ctx, conn, LOGL_DEBUG, NULL); |
| 559 | } |
| 560 | |
| 561 | |
| 562 | static __attribute__((constructor)) void on_dso_load(void) |
| 563 | { |
Harald Welte | 4ccd2fc | 2019-12-01 13:32:54 +0100 | [diff] [blame] | 564 | OSMO_ASSERT(osmo_fsm_register(&remsim_server_client_fsm) == 0); |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 565 | } |
| 566 | |
| 567 | |
| 568 | /*********************************************************************** |
| 569 | * IPA RSPRO Server |
| 570 | ***********************************************************************/ |
| 571 | |
Harald Welte | f30ff9e | 2019-03-30 19:17:37 +0100 | [diff] [blame] | 572 | struct rspro_client_conn *_client_conn_by_slot(struct rspro_server *srv, const struct client_slot *cslot) |
| 573 | { |
| 574 | struct rspro_client_conn *conn; |
| 575 | llist_for_each_entry(conn, &srv->clients, list) { |
| 576 | if (client_slot_equals(&conn->client.slot, cslot)) |
| 577 | return conn; |
| 578 | } |
| 579 | return NULL; |
| 580 | } |
| 581 | struct rspro_client_conn *client_conn_by_slot(struct rspro_server *srv, const struct client_slot *cslot) |
| 582 | { |
| 583 | struct rspro_client_conn *conn; |
| 584 | pthread_rwlock_rdlock(&srv->rwlock); |
| 585 | conn = _client_conn_by_slot(srv, cslot); |
| 586 | pthread_rwlock_unlock(&srv->rwlock); |
| 587 | return conn; |
| 588 | } |
| 589 | |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 590 | struct rspro_client_conn *_bankd_conn_by_id(struct rspro_server *srv, uint16_t bank_id) |
| 591 | { |
| 592 | struct rspro_client_conn *conn; |
| 593 | llist_for_each_entry(conn, &srv->banks, list) { |
| 594 | if (conn->bank.bank_id == bank_id) |
| 595 | return conn; |
| 596 | } |
| 597 | return NULL; |
| 598 | } |
| 599 | struct rspro_client_conn *bankd_conn_by_id(struct rspro_server *srv, uint16_t bank_id) |
| 600 | { |
| 601 | struct rspro_client_conn *conn; |
| 602 | pthread_rwlock_rdlock(&srv->rwlock); |
| 603 | conn = _bankd_conn_by_id(srv, bank_id); |
| 604 | pthread_rwlock_unlock(&srv->rwlock); |
| 605 | return conn; |
| 606 | } |
| 607 | |
| 608 | static int handle_rx_rspro(struct rspro_client_conn *conn, const RsproPDU_t *pdu) |
| 609 | { |
Harald Welte | 15e8b7f | 2022-04-27 09:24:21 +0200 | [diff] [blame] | 610 | LOGPFSML(conn->fi, LOGL_DEBUG, "Rx RSPRO %s\n", rspro_msgt_name(pdu)); |
Harald Welte | b49ac9c | 2019-03-09 20:36:07 +0100 | [diff] [blame] | 611 | |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 612 | switch (pdu->msg.present) { |
| 613 | case RsproPDUchoice_PR_connectClientReq: |
| 614 | osmo_fsm_inst_dispatch(conn->fi, CLNTC_E_CLIENT_CONN, (void *)pdu); |
| 615 | break; |
| 616 | case RsproPDUchoice_PR_connectBankReq: |
| 617 | osmo_fsm_inst_dispatch(conn->fi, CLNTC_E_BANK_CONN, (void *)pdu); |
| 618 | break; |
| 619 | case RsproPDUchoice_PR_createMappingRes: |
| 620 | osmo_fsm_inst_dispatch(conn->fi, CLNTC_E_CREATE_MAP_RES, (void *)pdu); |
| 621 | break; |
| 622 | case RsproPDUchoice_PR_removeMappingRes: |
| 623 | osmo_fsm_inst_dispatch(conn->fi, CLNTC_E_REMOVE_MAP_RES, (void *)pdu); |
| 624 | break; |
Harald Welte | d571a3e | 2019-03-11 22:09:50 +0100 | [diff] [blame] | 625 | case RsproPDUchoice_PR_configClientIdRes: |
Harald Welte | e5c7773 | 2019-03-07 23:58:24 +0100 | [diff] [blame] | 626 | osmo_fsm_inst_dispatch(conn->fi, CLNTC_E_CONFIG_CL_RES, (void *)pdu); |
| 627 | break; |
Harald Welte | 19dee08 | 2019-03-31 10:53:45 +0200 | [diff] [blame] | 628 | case RsproPDUchoice_PR_configClientBankRes: |
| 629 | /* TODO: store somewhere that client has ACKed? */ |
| 630 | break; |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 631 | default: |
Harald Welte | 19dee08 | 2019-03-31 10:53:45 +0200 | [diff] [blame] | 632 | LOGPFSML(conn->fi, LOGL_ERROR, "Received unknown/unimplemented RSPRO msg_type %s\n", |
| 633 | rspro_msgt_name(pdu)); |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 634 | return -1; |
| 635 | } |
| 636 | return 0; |
| 637 | } |
| 638 | |
| 639 | /* data was received from one of the client connections to the RSPRO socket */ |
| 640 | static int sock_read_cb(struct ipa_server_conn *peer, struct msgb *msg) |
| 641 | { |
| 642 | struct ipaccess_head *hh = (struct ipaccess_head *) msg->data; |
| 643 | struct ipaccess_head_ext *he = (struct ipaccess_head_ext *) msgb_l2(msg); |
| 644 | struct rspro_client_conn *conn = peer->data; |
| 645 | RsproPDU_t *pdu; |
| 646 | int rc; |
| 647 | |
| 648 | if (msgb_length(msg) < sizeof(*hh)) |
| 649 | goto invalid; |
| 650 | msg->l2h = &hh->data[0]; |
Harald Welte | 7bfcc65 | 2019-03-08 16:55:01 +0100 | [diff] [blame] | 651 | switch (hh->proto) { |
| 652 | case IPAC_PROTO_IPACCESS: |
| 653 | rc = ipa_server_conn_ccm(peer, msg); |
Harald Welte | 15b75e1 | 2019-03-08 16:55:46 +0100 | [diff] [blame] | 654 | if (rc < 0) |
| 655 | break; |
| 656 | switch (hh->data[0]) { |
| 657 | case IPAC_MSGT_PONG: |
| 658 | ipa_keepalive_fsm_pong_received(conn->keepalive_fi); |
| 659 | rc = 0; |
| 660 | break; |
| 661 | default: |
| 662 | break; |
| 663 | } |
Harald Welte | 7bfcc65 | 2019-03-08 16:55:01 +0100 | [diff] [blame] | 664 | break; |
| 665 | case IPAC_PROTO_OSMO: |
| 666 | if (!he || msgb_l2len(msg)< sizeof(*he)) |
| 667 | goto invalid; |
| 668 | msg->l2h = &he->data[0]; |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 669 | |
Harald Welte | 7bfcc65 | 2019-03-08 16:55:01 +0100 | [diff] [blame] | 670 | switch (he->proto) { |
| 671 | case IPAC_PROTO_EXT_RSPRO: |
| 672 | pdu = rspro_dec_msg(msg); |
| 673 | if (!pdu) |
| 674 | goto invalid; |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 675 | |
Harald Welte | 7bfcc65 | 2019-03-08 16:55:01 +0100 | [diff] [blame] | 676 | rc = handle_rx_rspro(conn, pdu); |
| 677 | ASN_STRUCT_FREE(asn_DEF_RsproPDU, pdu); |
| 678 | break; |
| 679 | default: |
| 680 | goto invalid; |
| 681 | } |
| 682 | break; |
| 683 | default: |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 684 | goto invalid; |
Harald Welte | 7bfcc65 | 2019-03-08 16:55:01 +0100 | [diff] [blame] | 685 | } |
Harald Welte | 6b990f9 | 2019-07-18 18:16:33 +0200 | [diff] [blame] | 686 | msgb_free(msg); |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 687 | return rc; |
| 688 | |
| 689 | invalid: |
| 690 | msgb_free(msg); |
| 691 | return -1; |
| 692 | } |
| 693 | |
| 694 | static int sock_closed_cb(struct ipa_server_conn *peer) |
| 695 | { |
| 696 | struct rspro_client_conn *conn = peer->data; |
| 697 | if (conn->fi) |
| 698 | osmo_fsm_inst_dispatch(conn->fi, CLNTC_E_TCP_DOWN, NULL); |
| 699 | /* FIXME: who cleans up conn? */ |
| 700 | /* ipa server code relases 'peer' just after this */ |
| 701 | return 0; |
| 702 | } |
| 703 | |
Harald Welte | 15b75e1 | 2019-03-08 16:55:46 +0100 | [diff] [blame] | 704 | static const struct ipa_keepalive_params ka_params = { |
| 705 | .interval = 30, |
| 706 | .wait_for_resp = 10, |
| 707 | }; |
| 708 | |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 709 | /* a new TCP connection was accepted on the RSPRO server socket */ |
| 710 | static int accept_cb(struct ipa_server_link *link, int fd) |
| 711 | { |
| 712 | struct rspro_server *srv = link->data; |
| 713 | struct rspro_client_conn *conn; |
| 714 | |
| 715 | conn = talloc_zero(srv, struct rspro_client_conn); |
| 716 | OSMO_ASSERT(conn); |
| 717 | |
| 718 | conn->srv = srv; |
| 719 | /* don't allocate peer under 'conn', as it must survive 'conn' during teardown */ |
| 720 | conn->peer = ipa_server_conn_create(link, link, fd, sock_read_cb, sock_closed_cb, conn); |
| 721 | if (!conn->peer) |
| 722 | goto out_err; |
| 723 | |
| 724 | /* don't allocate 'fi' as slave from 'conn', as 'fi' needs to survive 'conn' during |
| 725 | * teardown */ |
| 726 | conn->fi = server_client_fsm_alloc(srv, conn); |
| 727 | if (!conn->fi) |
| 728 | goto out_err_conn; |
| 729 | |
Harald Welte | 15b75e1 | 2019-03-08 16:55:46 +0100 | [diff] [blame] | 730 | /* use ipa_keepalive_fsm to periodically send an IPA_PING and expect a PONG in response */ |
| 731 | conn->keepalive_fi = ipa_server_conn_alloc_keepalive_fsm(conn->peer, &ka_params, NULL); |
| 732 | if (!conn->keepalive_fi) |
| 733 | goto out_err_fi; |
| 734 | /* ensure parent is notified once keepalive FSM instance is dying */ |
| 735 | osmo_fsm_inst_change_parent(conn->keepalive_fi, conn->fi, CLNTC_E_KA_TIMEOUT); |
| 736 | ipa_keepalive_fsm_start(conn->keepalive_fi); |
| 737 | |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 738 | INIT_LLIST_HEAD(&conn->bank.maps_new); |
| 739 | INIT_LLIST_HEAD(&conn->bank.maps_unack); |
| 740 | INIT_LLIST_HEAD(&conn->bank.maps_active); |
| 741 | INIT_LLIST_HEAD(&conn->bank.maps_delreq); |
| 742 | INIT_LLIST_HEAD(&conn->bank.maps_deleting); |
| 743 | |
| 744 | pthread_rwlock_wrlock(&conn->srv->rwlock); |
| 745 | llist_add_tail(&conn->list, &srv->connections); |
| 746 | pthread_rwlock_unlock(&conn->srv->rwlock); |
| 747 | |
| 748 | osmo_fsm_inst_dispatch(conn->fi, CLNTC_E_TCP_UP, NULL); |
| 749 | return 0; |
| 750 | |
Harald Welte | 15b75e1 | 2019-03-08 16:55:46 +0100 | [diff] [blame] | 751 | out_err_fi: |
| 752 | osmo_fsm_inst_term(conn->fi, OSMO_FSM_TERM_ERROR, NULL); |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 753 | out_err_conn: |
| 754 | ipa_server_conn_destroy(conn->peer); |
| 755 | /* the above will free 'conn' down the chain */ |
| 756 | return -1; |
| 757 | out_err: |
| 758 | talloc_free(conn); |
| 759 | return -1; |
| 760 | } |
| 761 | |
| 762 | /* call-back if we were triggered by a rest_api thread */ |
| 763 | int event_fd_cb(struct osmo_fd *ofd, unsigned int what) |
| 764 | { |
| 765 | struct rspro_server *srv = ofd->data; |
| 766 | struct rspro_client_conn *conn; |
| 767 | bool non_empty_new, non_empty_del; |
| 768 | uint64_t value; |
| 769 | int rc; |
| 770 | |
| 771 | /* read from the socket to "confirm" the event and make it non-readable again */ |
| 772 | rc = read(ofd->fd, &value, 8); |
| 773 | if (rc < 8) { |
Harald Welte | a9d7ad1 | 2021-12-08 21:09:12 +0100 | [diff] [blame] | 774 | LOGP(DMAIN, LOGL_ERROR, "Error reading eventfd: %d\n", rc); |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 775 | return rc; |
| 776 | } |
| 777 | |
Harald Welte | a9d7ad1 | 2021-12-08 21:09:12 +0100 | [diff] [blame] | 778 | LOGP(DMAIN, LOGL_INFO, "Event FD arrived, checking for any pending work\n"); |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 779 | |
| 780 | pthread_rwlock_rdlock(&srv->rwlock); |
| 781 | llist_for_each_entry(conn, &srv->banks, list) { |
| 782 | slotmaps_rdlock(srv->slotmaps); |
| 783 | non_empty_new = llist_empty(&conn->bank.maps_new); |
| 784 | non_empty_del = llist_empty(&conn->bank.maps_delreq); |
| 785 | slotmaps_unlock(srv->slotmaps); |
| 786 | |
| 787 | /* trigger FSM to send any pending new/deleted maps */ |
| 788 | if (non_empty_new || non_empty_del) |
| 789 | osmo_fsm_inst_dispatch(conn->fi, CLNTC_E_PUSH, NULL); |
| 790 | } |
| 791 | pthread_rwlock_unlock(&srv->rwlock); |
| 792 | |
| 793 | return 0; |
| 794 | } |
| 795 | |
| 796 | /* unlink all slotmaps from any of the lists of this conn->bank.maps_* */ |
| 797 | static void _unlink_all_slotmaps(struct rspro_client_conn *conn) |
| 798 | { |
| 799 | struct slot_mapping *smap, *smap2; |
| 800 | |
| 801 | llist_for_each_entry_safe(smap, smap2, &conn->bank.maps_new, bank_list) { |
| 802 | /* unlink from list and keep in state NEW */ |
| 803 | _slotmap_state_change(smap, SLMAP_S_NEW, NULL); |
| 804 | } |
| 805 | llist_for_each_entry_safe(smap, smap2, &conn->bank.maps_unack, bank_list) { |
| 806 | /* unlink from list and change to state NEW */ |
| 807 | _slotmap_state_change(smap, SLMAP_S_NEW, NULL); |
| 808 | } |
| 809 | llist_for_each_entry_safe(smap, smap2, &conn->bank.maps_active, bank_list) { |
| 810 | /* unlink from list and change to state NEW */ |
| 811 | _slotmap_state_change(smap, SLMAP_S_NEW, NULL); |
| 812 | } |
| 813 | llist_for_each_entry_safe(smap, smap2, &conn->bank.maps_delreq, bank_list) { |
| 814 | /* unlink from list and delete */ |
| 815 | _slotmap_del(smap->maps, smap); |
| 816 | } |
| 817 | llist_for_each_entry_safe(smap, smap2, &conn->bank.maps_deleting, bank_list) { |
| 818 | /* unlink from list and delete */ |
| 819 | _slotmap_del(smap->maps, smap); |
| 820 | } |
| 821 | } |
| 822 | |
| 823 | /* only to be used by the FSM cleanup. */ |
| 824 | static void rspro_client_conn_destroy(struct rspro_client_conn *conn) |
| 825 | { |
| 826 | /* this will internally call closed_cb() which will dispatch a TCP_DOWN event */ |
| 827 | ipa_server_conn_destroy(conn->peer); |
| 828 | conn->peer = NULL; |
| 829 | |
| 830 | /* ensure all slotmaps are unlinked + returned to NEW or deleted */ |
| 831 | slotmaps_wrlock(conn->srv->slotmaps); |
| 832 | _unlink_all_slotmaps(conn); |
| 833 | slotmaps_unlock(conn->srv->slotmaps); |
| 834 | |
| 835 | pthread_rwlock_wrlock(&conn->srv->rwlock); |
| 836 | llist_del(&conn->list); |
| 837 | pthread_rwlock_unlock(&conn->srv->rwlock); |
| 838 | |
| 839 | talloc_free(conn); |
| 840 | } |
| 841 | |
| 842 | |
| 843 | struct rspro_server *rspro_server_create(void *ctx, const char *host, uint16_t port) |
| 844 | |
| 845 | { |
| 846 | struct rspro_server *srv = talloc_zero(ctx, struct rspro_server); |
Harald Welte | 5426124 | 2023-02-03 20:28:29 +0100 | [diff] [blame] | 847 | int rc; |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 848 | OSMO_ASSERT(srv); |
| 849 | |
| 850 | pthread_rwlock_init(&srv->rwlock, NULL); |
| 851 | pthread_rwlock_wrlock(&srv->rwlock); |
| 852 | INIT_LLIST_HEAD(&srv->connections); |
| 853 | INIT_LLIST_HEAD(&srv->clients); |
| 854 | INIT_LLIST_HEAD(&srv->banks); |
| 855 | pthread_rwlock_unlock(&srv->rwlock); |
| 856 | |
| 857 | srv->link = ipa_server_link_create(ctx, NULL, host, port, accept_cb, srv); |
Harald Welte | 5426124 | 2023-02-03 20:28:29 +0100 | [diff] [blame] | 858 | if (!srv->link) |
| 859 | goto out_free; |
Harald Welte | a04ff86 | 2022-05-03 16:40:45 +0200 | [diff] [blame] | 860 | |
Harald Welte | 5426124 | 2023-02-03 20:28:29 +0100 | [diff] [blame] | 861 | rc = ipa_server_link_open(srv->link); |
| 862 | if (rc < 0) |
| 863 | goto out_destroy; |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 864 | |
| 865 | return srv; |
Harald Welte | 5426124 | 2023-02-03 20:28:29 +0100 | [diff] [blame] | 866 | |
| 867 | out_destroy: |
| 868 | ipa_server_link_destroy(srv->link); |
| 869 | out_free: |
| 870 | pthread_rwlock_destroy(&srv->rwlock); |
| 871 | talloc_free(srv); |
| 872 | |
| 873 | return NULL; |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 874 | } |
| 875 | |
| 876 | void rspro_server_destroy(struct rspro_server *srv) |
| 877 | { |
| 878 | /* FIXME: clear all lists */ |
| 879 | |
| 880 | ipa_server_link_destroy(srv->link); |
| 881 | srv->link = NULL; |
Harald Welte | a04ff86 | 2022-05-03 16:40:45 +0200 | [diff] [blame] | 882 | pthread_rwlock_destroy(&srv->rwlock); |
Harald Welte | f5a0fa3 | 2019-03-03 15:44:18 +0100 | [diff] [blame] | 883 | talloc_free(srv); |
| 884 | } |