| /* TS 23.060 ยง 6.1.2 Mobility Management States (Iu mode) */ |
| /* |
| * (C) 2019 by sysmocom - s.f.m.c. GmbH <info@sysmocom.de> |
| * All Rights Reserved |
| * |
| * SPDX-License-Identifier: AGPL-3.0+ |
| * |
| * Author: Pau Espin Pedrol <pespin@sysmocom.de> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU Affero General Public License as published by |
| * the Free Software Foundation; either version 3 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU Affero General Public License for more details. |
| * |
| * You should have received a copy of the GNU Affero General Public License |
| * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| */ |
| #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> |
| #include <osmocom/sgsn/gprs_ranap.h> |
| #include <osmocom/sgsn/gtp.h> |
| #include <osmocom/sgsn/pdpctx.h> |
| #include <osmocom/sgsn/mmctx.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_PS_DETACH: |
| break; |
| } |
| } |
| |
| static void st_pmm_connected(struct osmo_fsm_inst *fi, uint32_t event, void *data) |
| { |
| struct sgsn_mm_ctx *ctx = fi->priv; |
| |
| switch(event) { |
| case E_PMM_PS_CONN_RELEASE: |
| sgsn_ranap_iu_free(ctx); |
| mm_state_iu_fsm_state_chg(fi, ST_PMM_IDLE); |
| break; |
| case E_PMM_PS_DETACH: |
| sgsn_ranap_iu_release_free(ctx, NULL); |
| 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_ATTACH: |
| case E_PMM_PS_CONN_ESTABLISH: |
| mm_state_iu_fsm_state_chg(fi, ST_PMM_CONNECTED); |
| break; |
| case E_PMM_PS_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_PS_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_PS_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_PS_DETACH) | |
| X(E_PMM_PS_CONN_ESTABLISH) | |
| X(E_PMM_PS_ATTACH), |
| .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_PS_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_ASSERT(osmo_fsm_register(&mm_state_iu_fsm) == 0); |
| } |