76 lines
2.9 KiB
C
76 lines
2.9 KiB
C
/* nacc_fsm.h
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*
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* Copyright (C) 2021 by sysmocom - s.f.m.c. GmbH <info@sysmocom.de>
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* Author: Pau Espin Pedrol <pespin@sysmocom.de>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#pragma once
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#include <osmocom/core/fsm.h>
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#include <osmocom/gsm/gsm23003.h>
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#include <neigh_cache.h>
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struct GprsMs;
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struct gprs_rlcmac_tbf;
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enum nacc_fsm_event {
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NACC_EV_RX_CELL_CHG_NOTIFICATION, /* data: Packet_Cell_Change_Notification_t* */
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NACC_EV_RX_RAC_CI, /* RAC_CI became available in neigh_cache. NULL on failure, pointer to ctx->cgi_ps on success */
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NACC_EV_RX_SI, /* data: struct si_cache_entry* */
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NACC_EV_CREATE_RLCMAC_MSG, /* data: struct nacc_ev_create_rlcmac_msg_ctx* */
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NACC_EV_RX_CELL_CHG_CONTINUE_ACK,
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NACC_EV_TIMEOUT_CELL_CHG_CONTINUE, /* Poll Timeout */
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};
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enum nacc_fsm_states {
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NACC_ST_INITIAL,
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NACC_ST_WAIT_RESOLVE_RAC_CI,
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NACC_ST_WAIT_REQUEST_SI,
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NACC_ST_TX_NEIGHBOUR_DATA,
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NACC_ST_TX_CELL_CHG_CONTINUE,
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NACC_ST_WAIT_CELL_CHG_CONTINUE_ACK,
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NACC_ST_DONE,
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};
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struct nacc_fsm_ctx {
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struct osmo_fsm_inst *fi;
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struct GprsMs* ms; /* back pointer */
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struct ctrl_handle *neigh_ctrl;
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struct ctrl_connection *neigh_ctrl_conn;
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struct neigh_cache_entry_key neigh_key; /* target cell info from MS */
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struct osmo_cell_global_id_ps cgi_ps; /* target cell info resolved from req_{arfcn+bsic} */
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struct si_cache_value si_info; /* SI info resolved from SGSN, to be sent to MS */
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size_t si_info_bytes_sent; /* How many bytes out of si_info->si_len were already sent to MS */
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size_t container_idx; /* Next container_idx to assign when sending Packet Neighbor Data message */
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uint32_t continue_poll_fn; /* Scheduled poll FN to CTRL ACK the Pkt Cell Chg Continue */
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uint8_t continue_poll_ts; /* Scheduled poll TS to CTRL ACK the Pkt Cell Chg Continue */
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};
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/* passed as data in NACC_EV_CREATE_RLCMAC_MSG */
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struct nacc_ev_create_rlcmac_msg_ctx {
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struct gprs_rlcmac_tbf *tbf; /* target tbf to create messages for */
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uint32_t fn; /* FN where the created DL ctrl block is to be sent */
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uint8_t ts; /* TS where the created DL ctrl block is to be sent */
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struct msgb *msg; /* to be filled by FSM during event processing */
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};
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struct nacc_fsm_ctx *nacc_fsm_alloc(struct GprsMs* ms);
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bool nacc_fsm_is_waiting_addr_resolution(const struct nacc_fsm_ctx *ctx,
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const struct neigh_cache_entry_key *neigh_key);
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bool nacc_fsm_is_waiting_si_resolution(const struct nacc_fsm_ctx *ctx,
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const struct osmo_cell_global_id_ps *cgi_ps);
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bool nacc_fsm_exp_ctrl_ack(const struct nacc_fsm_ctx *ctx, uint32_t fn, uint8_t ts);
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