| #include <arpa/inet.h> |
| |
| #include <osmocom/core/tdef.h> |
| |
| #include <osmocom/sgsn/gprs_mm_state_iu_fsm.h> |
| |
| #include <osmocom/sgsn/debug.h> |
| #include <osmocom/sgsn/sgsn.h> |
| |
| #define X(s) (1 << (s)) |
| |
| static const struct osmo_tdef_state_timeout mm_state_iu_fsm_timeouts[32] = { |
| [ST_PMM_DETACHED] = { }, |
| [ST_PMM_CONNECTED] = { }, |
| [ST_PMM_IDLE] = { }, |
| }; |
| |
| #define mm_state_iu_fsm_state_chg(fi, NEXT_STATE) \ |
| osmo_tdef_fsm_inst_state_chg(fi, NEXT_STATE, mm_state_iu_fsm_timeouts, sgsn->cfg.T_defs, -1) |
| |
| static void mmctx_change_gtpu_endpoints_to_sgsn(struct sgsn_mm_ctx *mm_ctx) |
| { |
| char buf[INET_ADDRSTRLEN]; |
| struct sgsn_pdp_ctx *pdp; |
| llist_for_each_entry(pdp, &mm_ctx->pdp_list, list) { |
| LOGMMCTXP(LOGL_INFO, mm_ctx, "Changing GTP-U endpoints %s -> %s\n", |
| sgsn_gtp_ntoa(&pdp->lib->gsnlu), |
| inet_ntop(AF_INET, &sgsn->cfg.gtp_listenaddr.sin_addr, buf, sizeof(buf))); |
| sgsn_pdp_upd_gtp_u(pdp, |
| &sgsn->cfg.gtp_listenaddr.sin_addr, |
| sizeof(sgsn->cfg.gtp_listenaddr.sin_addr)); |
| } |
| } |
| |
| static void st_pmm_detached(struct osmo_fsm_inst *fi, uint32_t event, void *data) |
| { |
| switch(event) { |
| case E_PMM_PS_ATTACH: |
| mm_state_iu_fsm_state_chg(fi, ST_PMM_CONNECTED); |
| break; |
| case E_PMM_IMPLICIT_DETACH: |
| break; |
| } |
| } |
| |
| static void st_pmm_connected(struct osmo_fsm_inst *fi, uint32_t event, void *data) |
| { |
| switch(event) { |
| case E_PMM_PS_CONN_RELEASE: |
| mm_state_iu_fsm_state_chg(fi, ST_PMM_IDLE); |
| break; |
| case E_PMM_IMPLICIT_DETACH: |
| mm_state_iu_fsm_state_chg(fi, ST_PMM_DETACHED); |
| break; |
| case E_PMM_RA_UPDATE: |
| break; |
| } |
| } |
| |
| static void st_pmm_idle_on_enter(struct osmo_fsm_inst *fi, uint32_t prev_state) |
| { |
| struct sgsn_mm_ctx *ctx = fi->priv; |
| |
| mmctx_change_gtpu_endpoints_to_sgsn(ctx); |
| } |
| |
| static void st_pmm_idle(struct osmo_fsm_inst *fi, uint32_t event, void *data) |
| { |
| switch(event) { |
| case E_PMM_PS_CONN_ESTABLISH: |
| mm_state_iu_fsm_state_chg(fi, ST_PMM_CONNECTED); |
| break; |
| case E_PMM_IMPLICIT_DETACH: |
| mm_state_iu_fsm_state_chg(fi, ST_PMM_DETACHED); |
| break; |
| } |
| } |
| |
| static struct osmo_fsm_state mm_state_iu_fsm_states[] = { |
| [ST_PMM_DETACHED] = { |
| .in_event_mask = X(E_PMM_PS_ATTACH) | X(E_PMM_IMPLICIT_DETACH), |
| .out_state_mask = X(ST_PMM_CONNECTED), |
| .name = "Detached", |
| .action = st_pmm_detached, |
| }, |
| [ST_PMM_CONNECTED] = { |
| .in_event_mask = X(E_PMM_PS_CONN_RELEASE) | X(E_PMM_RA_UPDATE) | X(E_PMM_IMPLICIT_DETACH), |
| .out_state_mask = X(ST_PMM_DETACHED) | X(ST_PMM_IDLE), |
| .name = "Connected", |
| .action = st_pmm_connected, |
| }, |
| [ST_PMM_IDLE] = { |
| .in_event_mask = X(E_PMM_IMPLICIT_DETACH) | X(E_PMM_PS_CONN_ESTABLISH), |
| .out_state_mask = X(ST_PMM_DETACHED) | X(ST_PMM_CONNECTED), |
| .name = "Idle", |
| .onenter = st_pmm_idle_on_enter, |
| .action = st_pmm_idle, |
| }, |
| }; |
| |
| const struct value_string mm_state_iu_fsm_event_names[] = { |
| OSMO_VALUE_STRING(E_PMM_PS_ATTACH), |
| OSMO_VALUE_STRING(E_PMM_PS_CONN_RELEASE), |
| OSMO_VALUE_STRING(E_PMM_PS_CONN_ESTABLISH), |
| OSMO_VALUE_STRING(E_PMM_IMPLICIT_DETACH), |
| OSMO_VALUE_STRING(E_PMM_RA_UPDATE), |
| { 0, NULL } |
| }; |
| |
| struct osmo_fsm mm_state_iu_fsm = { |
| .name = "MM_STATE_Iu", |
| .states = mm_state_iu_fsm_states, |
| .num_states = ARRAY_SIZE(mm_state_iu_fsm_states), |
| .event_names = mm_state_iu_fsm_event_names, |
| .log_subsys = DMM, |
| }; |
| |
| static __attribute__((constructor)) void mm_state_iu_fsm_init(void) |
| { |
| osmo_fsm_register(&mm_state_iu_fsm); |
| } |