2018-08-24 18:37:28 +00:00
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#include <stdint.h>
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#include <string.h>
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#include <errno.h>
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#include <talloc.h>
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#include <osmocom/core/logging.h>
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#include <osmocom/core/utils.h>
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#include <osmocom/core/msgb.h>
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#include <osmocom/core/fsm.h>
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#include <osmocom/abis/ipa.h>
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#include <osmocom/gsm/protocol/ipaccess.h>
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#include "client.h"
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#include "rspro_util.h"
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#define S(x) (1 << (x))
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2018-10-14 18:07:59 +00:00
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static void push_and_send(struct ipa_client_conn *ipa, struct msgb *msg_tx)
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{
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ipa_prepend_header_ext(msg_tx, IPAC_PROTO_EXT_RSPRO);
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ipa_msg_push_header(msg_tx, IPAC_PROTO_OSMO);
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ipa_client_conn_send(ipa, msg_tx);
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/* msg_tx is now queued and will be freed. */
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}
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void ipa_client_conn_send_rspro(struct ipa_client_conn *ipa, RsproPDU_t *rspro)
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{
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struct msgb *msg = rspro_enc_msg(rspro);
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OSMO_ASSERT(msg);
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push_and_send(ipa, msg);
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}
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2018-08-24 18:37:28 +00:00
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static void bankd_updown_cb(struct ipa_client_conn *conn, int up)
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{
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struct bankd_client *bc = conn->data;
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printf("RSPRO link to %s:%d %s\n", conn->addr, conn->port, up ? "UP" : "DOWN");
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osmo_fsm_inst_dispatch(bc->bankd_fi, up ? BDC_E_TCP_UP: BDC_E_TCP_DOWN, 0);
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}
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/***********************************************************************
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* bankd connection FSM
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***********************************************************************/
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enum bankd_conn_fsm_state {
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/* waiting for initial connectiong to remsim-bankd */
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BDC_ST_INIT,
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/* bankd connection established, waiting for ClientConnectRes */
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BDC_ST_ESTABLISHED,
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/* bankd connection etsablished, ClientConnect succeeded */
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BDC_ST_CONNECTED,
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/* connection lost, we're waiting for a re-establish */
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BDC_ST_REESTABLISH,
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};
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static const struct value_string remsim_client_bankd_fsm_event_names[] = {
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OSMO_VALUE_STRING(BDC_E_TCP_UP),
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OSMO_VALUE_STRING(BDC_E_TCP_DOWN),
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OSMO_VALUE_STRING(BDC_E_CLIENT_CONN_RES),
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{ 0, NULL }
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};
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#define T1_WAIT_CLIENT_CONN_RES 10
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#define T2_RECONNECT 10
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static void bdc_st_init_onenter(struct osmo_fsm_inst *fi, uint32_t prev_state)
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{
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struct bankd_client *bc = (struct bankd_client *) fi->priv;
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int rc;
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printf("onenter\n");
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bc->bankd_conn = ipa_client_conn_create(bc, NULL, 0, bc->bankd_host, bc->bankd_port,
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bankd_updown_cb, bankd_read_cb, NULL, bc);
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if (!bc->bankd_conn) {
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fprintf(stderr, "Unable to create socket: %s\n", strerror(errno));
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exit(1);
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}
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/* Attempt to connect TCP socket */
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rc = ipa_client_conn_open(bc->bankd_conn);
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if (rc < 0) {
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fprintf(stderr, "Unable to connect: %s\n", strerror(errno));
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exit(1);
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}
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}
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static void bdc_st_init(struct osmo_fsm_inst *fi, uint32_t event, void *data)
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{
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switch (event) {
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case BDC_E_TCP_UP:
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osmo_fsm_inst_state_chg(fi, BDC_ST_ESTABLISHED, T1_WAIT_CLIENT_CONN_RES, 1);
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break;
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2018-09-24 09:51:51 +00:00
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case BDC_E_TCP_DOWN:
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osmo_fsm_inst_state_chg(fi, BDC_ST_REESTABLISH, T2_RECONNECT, 2);
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break;
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2018-08-24 18:37:28 +00:00
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default:
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OSMO_ASSERT(0);
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}
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}
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static void bdc_st_established_onenter(struct osmo_fsm_inst *fi, uint32_t prev_state)
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{
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struct bankd_client *bc = (struct bankd_client *) fi->priv;
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RsproPDU_t *pdu;
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/* FIXME: Send ClientConnReq */
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2018-10-09 22:36:46 +00:00
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pdu = rspro_gen_ConnectClientReq(&bc->own_comp_id, bc->clslot);
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2018-08-24 19:42:22 +00:00
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ipa_client_conn_send_rspro(bc->bankd_conn, pdu);
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2018-08-24 18:37:28 +00:00
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}
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static void bdc_st_established(struct osmo_fsm_inst *fi, uint32_t event, void *data)
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{
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switch (event) {
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case BDC_E_TCP_DOWN:
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osmo_fsm_inst_state_chg(fi, BDC_ST_REESTABLISH, T2_RECONNECT, 2);
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break;
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case BDC_E_CLIENT_CONN_RES:
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/* somehow notify the main code? */
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osmo_fsm_inst_state_chg(fi, BDC_ST_CONNECTED, 0, 0);
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break;
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default:
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OSMO_ASSERT(0);
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}
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}
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static void bdc_st_connected(struct osmo_fsm_inst *fi, uint32_t event, void *data)
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{
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switch (event) {
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case BDC_E_TCP_DOWN:
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osmo_fsm_inst_state_chg(fi, BDC_ST_REESTABLISH, T2_RECONNECT, 2);
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break;
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default:
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OSMO_ASSERT(0);
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}
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}
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static void bdc_st_reestablish_onenter(struct osmo_fsm_inst *fi, uint32_t prev_state)
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{
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struct bankd_client *bc = (struct bankd_client *) fi->priv;
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int rc;
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/* Attempt to connect TCP socket */
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rc = ipa_client_conn_open(bc->bankd_conn);
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if (rc < 0) {
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fprintf(stderr, "Unable to connect RSPRO to %s:%d - %s\n",
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bc->bankd_conn->addr, bc->bankd_conn->port, strerror(errno));
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/* FIXME: retry? Timer? Abort? */
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OSMO_ASSERT(0);
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}
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}
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static void bdc_st_reestablish(struct osmo_fsm_inst *fi, uint32_t event, void *data)
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{
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switch (event) {
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case BDC_E_TCP_UP:
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osmo_fsm_inst_state_chg(fi, BDC_ST_ESTABLISHED, T1_WAIT_CLIENT_CONN_RES, 1);
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break;
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2018-09-24 09:51:51 +00:00
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case BDC_E_TCP_DOWN:
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/* wait for normal T2 timeout */
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break;
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2018-08-24 18:37:28 +00:00
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default:
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OSMO_ASSERT(0);
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}
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}
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static int remsim_client_bankd_fsm_timer_cb(struct osmo_fsm_inst *fi)
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{
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2018-09-24 09:51:51 +00:00
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switch (fi->T) {
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case 2:
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osmo_fsm_inst_state_chg(fi, BDC_ST_REESTABLISH, T2_RECONNECT, 2);
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break;
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case 1:
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/* FIXME: close connection and re-start */
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break;
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default:
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OSMO_ASSERT(0);
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}
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2018-08-24 18:37:28 +00:00
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return 0;
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}
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static const struct osmo_fsm_state bankd_conn_fsm_states[] = {
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[BDC_ST_INIT] = {
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.name = "INIT",
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2018-09-24 09:51:51 +00:00
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.in_event_mask = S(BDC_E_TCP_UP) | S(BDC_E_TCP_DOWN),
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.out_state_mask = S(BDC_ST_ESTABLISHED) | S(BDC_ST_REESTABLISH),
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2018-08-24 18:37:28 +00:00
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.action = bdc_st_init,
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},
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[BDC_ST_ESTABLISHED] = {
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.name = "ESTABLISHED",
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.in_event_mask = S(BDC_E_TCP_DOWN) | S(BDC_E_CLIENT_CONN_RES),
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.out_state_mask = S(BDC_ST_CONNECTED) | S(BDC_ST_REESTABLISH),
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.action = bdc_st_established,
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.onenter = bdc_st_established_onenter,
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},
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[BDC_ST_CONNECTED] = {
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.name = "CONNECTED",
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.in_event_mask = S(BDC_E_TCP_DOWN),
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.out_state_mask = S(BDC_ST_REESTABLISH),
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.action = bdc_st_connected,
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},
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[BDC_ST_REESTABLISH] = {
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.name = "REESTABLISH",
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2018-09-24 09:51:51 +00:00
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.in_event_mask = S(BDC_E_TCP_UP) | S(BDC_E_TCP_DOWN),
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.out_state_mask = S(BDC_ST_ESTABLISHED) | S(BDC_ST_REESTABLISH),
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2018-08-24 18:37:28 +00:00
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.action = bdc_st_reestablish,
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.onenter = bdc_st_reestablish_onenter,
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},
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};
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struct osmo_fsm remsim_client_bankd_fsm = {
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.name = "BANKD_CONN",
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.states = bankd_conn_fsm_states,
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.num_states = ARRAY_SIZE(bankd_conn_fsm_states),
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.timer_cb = remsim_client_bankd_fsm_timer_cb,
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.log_subsys = DMAIN,
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.event_names = remsim_client_bankd_fsm_event_names,
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};
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int bankd_conn_fsm_alloc(struct bankd_client *bc)
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{
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struct osmo_fsm_inst *fi;
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fi = osmo_fsm_inst_alloc(&remsim_client_bankd_fsm, bc, bc, LOGL_DEBUG, "bankd");
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if (!fi)
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return -1;
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bc->bankd_fi = fi;
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/* onenter of the initial state is not automatically executed by osmo_fsm :( */
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bdc_st_init_onenter(fi, 0);
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return 0;
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}
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/***********************************************************************
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* server connection FSM
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***********************************************************************/
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enum server_conn_fsm_state {
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/* waiting for initial connectiong to remsim-server */
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SRVC_ST_INIT,
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/* server connection established, waiting for ClientConnectRes */
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SRVC_ST_ESTABLISHED,
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/* server connection etsablished, ClientConnect succeeded */
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SRVC_ST_CONNECTED,
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/* connection lost, we're waiting for a re-establish */
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SRVC_ST_REESTABLISH,
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};
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static const struct value_string server_conn_fsm_event_names[] = {
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OSMO_VALUE_STRING(SRVC_E_TCP_UP),
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OSMO_VALUE_STRING(SRVC_E_TCP_DOWN),
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OSMO_VALUE_STRING(SRVC_E_CLIENT_CONN_RES),
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{ 0, NULL }
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};
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2018-08-24 20:20:20 +00:00
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static void srvc_updown_cb(struct ipa_client_conn *conn, int up)
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{
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struct rspro_server_conn *srvc = conn->data;
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printf("RSPRO link to %s:%d %s\n", conn->addr, conn->port, up ? "UP" : "DOWN");
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osmo_fsm_inst_dispatch(srvc->fi, up ? SRVC_E_TCP_UP: SRVC_E_TCP_DOWN, 0);
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}
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static int srvc_read_cb(struct ipa_client_conn *conn, struct msgb *msg)
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{
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struct ipaccess_head *hh = (struct ipaccess_head *) msg->data;
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struct ipaccess_head_ext *he = (struct ipaccess_head_ext *) msgb_l2(msg);
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struct rspro_server_conn *srvc = conn->data;
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2018-10-14 18:40:05 +00:00
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RsproPDU_t *pdu;
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2018-08-24 20:20:20 +00:00
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int rc;
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if (msgb_length(msg) < sizeof(*hh))
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goto invalid;
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msg->l2h = &hh->data[0];
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if (hh->proto != IPAC_PROTO_OSMO)
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goto invalid;
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if (!he || msgb_l2len(msg) < sizeof(*he))
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goto invalid;
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msg->l2h = &he->data[0];
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if (he->proto != IPAC_PROTO_EXT_RSPRO)
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goto invalid;
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printf("Received RSPRO %s\n", msgb_hexdump(msg));
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2018-10-14 18:40:05 +00:00
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pdu = rspro_dec_msg(msg);
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if (!pdu)
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goto invalid;
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2018-08-24 20:20:20 +00:00
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2018-10-14 18:40:05 +00:00
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rc = srvc->handle_rx(srvc, pdu);
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2018-08-24 20:20:20 +00:00
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return rc;
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invalid:
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msgb_free(msg);
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return -1;
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}
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static void srvc_st_init_onenter(struct osmo_fsm_inst *fi, uint32_t prev_state)
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{
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struct rspro_server_conn *srvc = (struct rspro_server_conn *) fi->priv;
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int rc;
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2018-10-14 18:08:50 +00:00
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srvc->conn = ipa_client_conn_create(fi, NULL, 0, srvc->server_host, srvc->server_port,
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2018-08-24 20:20:20 +00:00
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srvc_updown_cb, srvc_read_cb, NULL, srvc);
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if (!srvc->conn) {
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fprintf(stderr, "Unable to create socket: %s\n", strerror(errno));
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/* FIXME */
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}
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/* Attempt to connect TCP socket */
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rc = ipa_client_conn_open(srvc->conn);
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if (rc < 0) {
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fprintf(stderr, "Unable to connect: %s\n", strerror(errno));
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/* FIXME */
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}
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}
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2018-08-24 18:37:28 +00:00
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static void srvc_st_init(struct osmo_fsm_inst *fi, uint32_t event, void *data)
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{
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2018-08-24 20:20:20 +00:00
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switch (event) {
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case SRVC_E_TCP_UP:
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osmo_fsm_inst_state_chg(fi, SRVC_ST_ESTABLISHED, T1_WAIT_CLIENT_CONN_RES, 1);
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break;
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2018-09-24 09:51:51 +00:00
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case SRVC_E_TCP_DOWN:
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|
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osmo_fsm_inst_state_chg(fi, SRVC_ST_REESTABLISH, T2_RECONNECT, 2);
|
|
|
|
break;
|
2018-08-24 20:20:20 +00:00
|
|
|
default:
|
|
|
|
OSMO_ASSERT(0);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void srvc_st_established_onenter(struct osmo_fsm_inst *fi, uint32_t prev_state)
|
|
|
|
{
|
|
|
|
struct rspro_server_conn *srvc = (struct rspro_server_conn *) fi->priv;
|
|
|
|
RsproPDU_t *pdu;
|
|
|
|
|
|
|
|
/* FIXME: Bankd in case of Bankd connection! */
|
|
|
|
pdu = rspro_gen_ConnectClientReq(&srvc->own_comp_id, NULL);
|
|
|
|
ipa_client_conn_send_rspro(srvc->conn, pdu);
|
2018-08-24 18:37:28 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static void srvc_st_established(struct osmo_fsm_inst *fi, uint32_t event, void *data)
|
|
|
|
{
|
2018-08-24 20:20:20 +00:00
|
|
|
switch (event) {
|
|
|
|
case SRVC_E_TCP_DOWN:
|
|
|
|
osmo_fsm_inst_state_chg(fi, SRVC_ST_REESTABLISH, T2_RECONNECT, 2);
|
|
|
|
break;
|
|
|
|
case SRVC_E_CLIENT_CONN_RES:
|
|
|
|
/* somehow notify the main code? */
|
|
|
|
osmo_fsm_inst_state_chg(fi, SRVC_ST_CONNECTED, 0, 0);
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
OSMO_ASSERT(0);
|
|
|
|
}
|
2018-08-24 18:37:28 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static void srvc_st_connected(struct osmo_fsm_inst *fi, uint32_t event, void *data)
|
|
|
|
{
|
2018-08-24 20:20:20 +00:00
|
|
|
switch (event) {
|
|
|
|
case SRVC_E_TCP_DOWN:
|
|
|
|
osmo_fsm_inst_state_chg(fi, SRVC_ST_REESTABLISH, T2_RECONNECT, 2);
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
OSMO_ASSERT(0);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void srvc_st_reestablish_onenter(struct osmo_fsm_inst *fi, uint32_t prev_state)
|
|
|
|
{
|
|
|
|
struct rspro_server_conn *srvc = (struct rspro_server_conn *) fi->priv;
|
|
|
|
int rc;
|
|
|
|
|
|
|
|
/* Attempt to connect TCP socket */
|
|
|
|
rc = ipa_client_conn_open(srvc->conn);
|
|
|
|
if (rc < 0) {
|
|
|
|
fprintf(stderr, "Unable to connect RSPRO to %s:%d - %s\n",
|
|
|
|
srvc->server_host, srvc->server_port, strerror(errno));
|
|
|
|
/* FIXME: retry? Timer? Abort? */
|
|
|
|
OSMO_ASSERT(0);
|
|
|
|
}
|
2018-08-24 18:37:28 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static void srvc_st_reestablish(struct osmo_fsm_inst *fi, uint32_t event, void *data)
|
|
|
|
{
|
2018-08-24 20:20:20 +00:00
|
|
|
switch (event) {
|
2018-09-24 09:51:51 +00:00
|
|
|
case SRVC_E_TCP_UP:
|
2018-08-24 20:20:20 +00:00
|
|
|
osmo_fsm_inst_state_chg(fi, SRVC_ST_ESTABLISHED, T1_WAIT_CLIENT_CONN_RES, 1);
|
|
|
|
break;
|
2018-09-24 09:51:51 +00:00
|
|
|
case SRVC_E_TCP_DOWN:
|
|
|
|
/* wait for normal T2 call-back */
|
|
|
|
break;
|
2018-08-24 20:20:20 +00:00
|
|
|
default:
|
|
|
|
OSMO_ASSERT(0);
|
|
|
|
}
|
2018-08-24 18:37:28 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static int server_conn_fsm_timer_cb(struct osmo_fsm_inst *fi)
|
|
|
|
{
|
2018-09-24 09:51:51 +00:00
|
|
|
switch (fi->T) {
|
|
|
|
case 2:
|
|
|
|
osmo_fsm_inst_state_chg(fi, SRVC_ST_REESTABLISH, T2_RECONNECT, 2);
|
|
|
|
break;
|
|
|
|
case 1:
|
|
|
|
/* FIXME: close connection and re-start connection attempt */
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
OSMO_ASSERT(0);
|
|
|
|
}
|
|
|
|
|
2018-08-24 18:37:28 +00:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static const struct osmo_fsm_state server_conn_fsm_states[] = {
|
|
|
|
[SRVC_ST_INIT] = {
|
|
|
|
.name = "INIT",
|
2018-09-24 09:51:51 +00:00
|
|
|
.in_event_mask = S(SRVC_E_TCP_UP) | S(SRVC_E_TCP_DOWN),
|
|
|
|
.out_state_mask = S(SRVC_ST_ESTABLISHED) | S(SRVC_ST_REESTABLISH),
|
2018-08-24 18:37:28 +00:00
|
|
|
.action = srvc_st_init,
|
2018-08-24 20:20:20 +00:00
|
|
|
.onenter = srvc_st_init_onenter,
|
2018-08-24 18:37:28 +00:00
|
|
|
},
|
|
|
|
[SRVC_ST_ESTABLISHED] = {
|
|
|
|
.name = "ESTABLISHED",
|
|
|
|
.in_event_mask = S(SRVC_E_TCP_DOWN) | S(SRVC_E_CLIENT_CONN_RES),
|
|
|
|
.out_state_mask = S(SRVC_ST_CONNECTED) | S(SRVC_ST_REESTABLISH),
|
|
|
|
.action = srvc_st_established,
|
2018-08-24 20:20:20 +00:00
|
|
|
.onenter = srvc_st_established_onenter,
|
2018-08-24 18:37:28 +00:00
|
|
|
},
|
|
|
|
[SRVC_ST_CONNECTED] = {
|
|
|
|
.name = "CONNECTED",
|
|
|
|
.in_event_mask = S(SRVC_E_TCP_DOWN),
|
|
|
|
.out_state_mask = S(SRVC_ST_REESTABLISH),
|
|
|
|
.action = srvc_st_connected,
|
|
|
|
},
|
|
|
|
[SRVC_ST_REESTABLISH] = {
|
|
|
|
.name = "REESTABLISH",
|
2018-09-24 09:51:51 +00:00
|
|
|
.in_event_mask = S(SRVC_E_TCP_UP) | S(SRVC_E_TCP_DOWN),
|
|
|
|
.out_state_mask = S(SRVC_ST_ESTABLISHED) | S(SRVC_ST_REESTABLISH),
|
2018-08-24 18:37:28 +00:00
|
|
|
.action = srvc_st_reestablish,
|
2018-08-24 20:20:20 +00:00
|
|
|
.onenter = srvc_st_reestablish_onenter,
|
2018-08-24 18:37:28 +00:00
|
|
|
},
|
|
|
|
};
|
|
|
|
|
|
|
|
struct osmo_fsm remsim_client_server_fsm = {
|
|
|
|
.name = "SERVER_CONN",
|
|
|
|
.states = server_conn_fsm_states,
|
|
|
|
.num_states = ARRAY_SIZE(server_conn_fsm_states),
|
|
|
|
.timer_cb = server_conn_fsm_timer_cb,
|
|
|
|
.log_subsys = DMAIN,
|
|
|
|
.event_names = server_conn_fsm_event_names,
|
|
|
|
};
|
|
|
|
|
2018-10-14 18:08:50 +00:00
|
|
|
int server_conn_fsm_alloc(void *ctx, struct rspro_server_conn *srvc)
|
2018-08-24 18:37:28 +00:00
|
|
|
{
|
|
|
|
struct osmo_fsm_inst *fi;
|
|
|
|
|
2018-10-14 18:08:50 +00:00
|
|
|
fi = osmo_fsm_inst_alloc(&remsim_client_server_fsm, ctx, srvc, LOGL_DEBUG, "server");
|
2018-08-24 18:37:28 +00:00
|
|
|
if (!fi)
|
|
|
|
return -1;
|
|
|
|
|
2018-08-24 20:20:20 +00:00
|
|
|
srvc->fi = fi;
|
2018-08-24 18:37:28 +00:00
|
|
|
/* onenter of the initial state is not automatically executed by osmo_fsm :( */
|
2018-08-24 20:20:20 +00:00
|
|
|
srvc_st_init_onenter(fi, 0);
|
2018-08-24 18:37:28 +00:00
|
|
|
return 0;
|
|
|
|
}
|
2019-03-02 11:55:59 +00:00
|
|
|
|
|
|
|
static __attribute__((constructor)) void on_dso_load(void)
|
|
|
|
{
|
|
|
|
osmo_fsm_register(&remsim_client_bankd_fsm);
|
|
|
|
osmo_fsm_register(&remsim_client_server_fsm);
|
|
|
|
}
|