Pau Espin Pedrol | ccd1252 | 2019-08-30 17:06:36 +0200 | [diff] [blame] | 1 | #include <arpa/inet.h> |
| 2 | |
| 3 | #include <osmocom/core/tdef.h> |
| 4 | |
| 5 | #include <osmocom/sgsn/gprs_mm_state_iu_fsm.h> |
| 6 | |
| 7 | #include <osmocom/sgsn/debug.h> |
| 8 | #include <osmocom/sgsn/sgsn.h> |
| 9 | |
| 10 | #define X(s) (1 << (s)) |
| 11 | |
| 12 | static const struct osmo_tdef_state_timeout mm_state_iu_fsm_timeouts[32] = { |
| 13 | [ST_PMM_DETACHED] = { }, |
| 14 | [ST_PMM_CONNECTED] = { }, |
| 15 | [ST_PMM_IDLE] = { }, |
| 16 | }; |
| 17 | |
| 18 | #define mm_state_iu_fsm_state_chg(fi, NEXT_STATE) \ |
| 19 | osmo_tdef_fsm_inst_state_chg(fi, NEXT_STATE, mm_state_iu_fsm_timeouts, sgsn->cfg.T_defs, -1) |
| 20 | |
| 21 | static void mmctx_change_gtpu_endpoints_to_sgsn(struct sgsn_mm_ctx *mm_ctx) |
| 22 | { |
| 23 | char buf[INET_ADDRSTRLEN]; |
| 24 | struct sgsn_pdp_ctx *pdp; |
| 25 | llist_for_each_entry(pdp, &mm_ctx->pdp_list, list) { |
| 26 | LOGMMCTXP(LOGL_INFO, mm_ctx, "Changing GTP-U endpoints %s -> %s\n", |
| 27 | sgsn_gtp_ntoa(&pdp->lib->gsnlu), |
| 28 | inet_ntop(AF_INET, &sgsn->cfg.gtp_listenaddr.sin_addr, buf, sizeof(buf))); |
| 29 | sgsn_pdp_upd_gtp_u(pdp, |
| 30 | &sgsn->cfg.gtp_listenaddr.sin_addr, |
| 31 | sizeof(sgsn->cfg.gtp_listenaddr.sin_addr)); |
| 32 | } |
| 33 | } |
| 34 | |
| 35 | static void st_pmm_detached(struct osmo_fsm_inst *fi, uint32_t event, void *data) |
| 36 | { |
| 37 | switch(event) { |
| 38 | case E_PMM_PS_ATTACH: |
| 39 | mm_state_iu_fsm_state_chg(fi, ST_PMM_CONNECTED); |
| 40 | break; |
| 41 | case E_PMM_IMPLICIT_DETACH: |
| 42 | break; |
| 43 | } |
| 44 | } |
| 45 | |
| 46 | static void st_pmm_connected(struct osmo_fsm_inst *fi, uint32_t event, void *data) |
| 47 | { |
| 48 | switch(event) { |
| 49 | case E_PMM_PS_CONN_RELEASE: |
| 50 | mm_state_iu_fsm_state_chg(fi, ST_PMM_IDLE); |
| 51 | break; |
| 52 | case E_PMM_IMPLICIT_DETACH: |
| 53 | mm_state_iu_fsm_state_chg(fi, ST_PMM_DETACHED); |
| 54 | break; |
| 55 | case E_PMM_RA_UPDATE: |
| 56 | break; |
| 57 | } |
| 58 | } |
| 59 | |
| 60 | static void st_pmm_idle_on_enter(struct osmo_fsm_inst *fi, uint32_t prev_state) |
| 61 | { |
| 62 | struct sgsn_mm_ctx *ctx = fi->priv; |
| 63 | |
| 64 | mmctx_change_gtpu_endpoints_to_sgsn(ctx); |
| 65 | } |
| 66 | |
| 67 | static void st_pmm_idle(struct osmo_fsm_inst *fi, uint32_t event, void *data) |
| 68 | { |
| 69 | switch(event) { |
| 70 | case E_PMM_PS_CONN_ESTABLISH: |
| 71 | mm_state_iu_fsm_state_chg(fi, ST_PMM_CONNECTED); |
| 72 | break; |
| 73 | case E_PMM_IMPLICIT_DETACH: |
| 74 | mm_state_iu_fsm_state_chg(fi, ST_PMM_DETACHED); |
| 75 | break; |
| 76 | } |
| 77 | } |
| 78 | |
| 79 | static struct osmo_fsm_state mm_state_iu_fsm_states[] = { |
| 80 | [ST_PMM_DETACHED] = { |
| 81 | .in_event_mask = X(E_PMM_PS_ATTACH) | X(E_PMM_IMPLICIT_DETACH), |
| 82 | .out_state_mask = X(ST_PMM_CONNECTED), |
| 83 | .name = "Detached", |
| 84 | .action = st_pmm_detached, |
| 85 | }, |
| 86 | [ST_PMM_CONNECTED] = { |
| 87 | .in_event_mask = X(E_PMM_PS_CONN_RELEASE) | X(E_PMM_RA_UPDATE) | X(E_PMM_IMPLICIT_DETACH), |
| 88 | .out_state_mask = X(ST_PMM_DETACHED) | X(ST_PMM_IDLE), |
| 89 | .name = "Connected", |
| 90 | .action = st_pmm_connected, |
| 91 | }, |
| 92 | [ST_PMM_IDLE] = { |
| 93 | .in_event_mask = X(E_PMM_IMPLICIT_DETACH) | X(E_PMM_PS_CONN_ESTABLISH), |
| 94 | .out_state_mask = X(ST_PMM_DETACHED) | X(ST_PMM_CONNECTED), |
| 95 | .name = "Idle", |
| 96 | .onenter = st_pmm_idle_on_enter, |
| 97 | .action = st_pmm_idle, |
| 98 | }, |
| 99 | }; |
| 100 | |
| 101 | const struct value_string mm_state_iu_fsm_event_names[] = { |
| 102 | OSMO_VALUE_STRING(E_PMM_PS_ATTACH), |
| 103 | OSMO_VALUE_STRING(E_PMM_PS_CONN_RELEASE), |
| 104 | OSMO_VALUE_STRING(E_PMM_PS_CONN_ESTABLISH), |
| 105 | OSMO_VALUE_STRING(E_PMM_IMPLICIT_DETACH), |
| 106 | OSMO_VALUE_STRING(E_PMM_RA_UPDATE), |
| 107 | { 0, NULL } |
| 108 | }; |
| 109 | |
| 110 | struct osmo_fsm mm_state_iu_fsm = { |
| 111 | .name = "MM_STATE_Iu", |
| 112 | .states = mm_state_iu_fsm_states, |
| 113 | .num_states = ARRAY_SIZE(mm_state_iu_fsm_states), |
| 114 | .event_names = mm_state_iu_fsm_event_names, |
| 115 | .log_subsys = DMM, |
| 116 | }; |
| 117 | |
| 118 | static __attribute__((constructor)) void mm_state_iu_fsm_init(void) |
| 119 | { |
| 120 | osmo_fsm_register(&mm_state_iu_fsm); |
| 121 | } |