diff options
Diffstat (limited to 'cbc/BSC_ConnectionHandler.ttcn')
| -rw-r--r-- | cbc/BSC_ConnectionHandler.ttcn | 206 |
1 files changed, 206 insertions, 0 deletions
diff --git a/cbc/BSC_ConnectionHandler.ttcn b/cbc/BSC_ConnectionHandler.ttcn new file mode 100644 index 00000000..5f4fa59c --- /dev/null +++ b/cbc/BSC_ConnectionHandler.ttcn @@ -0,0 +1,206 @@ +/* BSC (CBSP) Connection Handler of CBC test suite in TTCN-3 + * (C) 2022 by sysmocom - s.f.m.c. GmbH <info@sysmocom.de> + * All rights reserved. + * + * Author: Pau Espin Pedrol <pespin@sysmocom.de> + * + * Released under the terms of GNU General Public License, Version 2 or + * (at your option) any later version. + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +module BSC_ConnectionHandler { + +import from Osmocom_Types all; + +import from BSSAP_Types all; +import from BSSMAP_Templates all; +import from CBSP_Types all; +import from CBSP_Templates all; +import from CBSP_Adapter all; +import from CBSP_CodecPort all; + +import from CBS_Message all; + +type function void_fn() runs on BSC_ConnHdlr; + +/* Coordinate with test_CT: */ +type port BSC_ConnHdlr_Coord_PT message { + inout charstring; +} with { extension "internal" }; + +/* this component represents a single subscriber connection */ +type component BSC_ConnHdlr extends CBSP_Adapter_CT { + var BSC_ConnHdlrPars g_pars; + port BSC_ConnHdlr_Coord_PT COORD; +} + +type record BSC_ConnHdlrPars { + charstring bsc_host, + integer bsc_cbsp_port, + charstring cbc_host, + integer cbc_cbsp_port, + boolean tcp_is_client, + void_fn start_fn, + CBS_Message exp_cbs_msg optional, + BSSMAP_FIELD_CellIdentificationList cell_list_success optional, + CBSP_FailureListItems tx_fail_list optional +}; + +function f_BSC_ConnHdlr_main(charstring id, BSC_ConnHdlrPars pars) runs on BSC_ConnHdlr { + g_pars := pars; + if (g_pars.tcp_is_client) { + CBSP_Adapter.f_connect(g_pars.cbc_host, g_pars.cbc_cbsp_port, + g_pars.bsc_host, g_pars.bsc_cbsp_port); + } else { + CBSP_Adapter.f_bind(g_pars.bsc_host, g_pars.bsc_cbsp_port); + CBSP_Adapter.f_wait_client_connect(); + } + + var BSSMAP_FIELD_CellIdentificationList cell_list := { + cIl_allInBSS := ''O + }; + activate(as_cbsp_keepalive_ack(0)); + f_cbsp_send(ts_CBSP_RESTART(cell_list, CBSP_BC_MSGT_CBS, CBSP_RI_DATA_LOST)); + f_cbsp_send(ts_CBSP_RESTART(cell_list, CBSP_BC_MSGT_EMERG, CBSP_RI_DATA_LOST)); + as_cbsp_reset(0); + COORD.send(COORD_MSG_CONNECTED); + + g_pars.start_fn.apply(); +} + +altstep as_cbsp_reset(integer idx) runs on CBSP_Adapter_CT { + var CBSP_RecvFrom rf; + [] CBSP[idx].receive(tr_CBSP_Recv(g_cbsp_conn_id[idx], tr_CBSP_RESET)) -> value rf { + var CBSP_IE ie; + f_cbsp_find_ie(rf.msg, CBSP_IEI_CELL_LIST, ie); + CBSP[idx].send(ts_CBSP_Send(g_cbsp_conn_id[idx], + ts_CBSP_RESET_COMPL(ie.body.cell_list.cell_id))); + } +} + +/* receive + acknowledge KEEP-ALIVE */ +altstep as_cbsp_keepalive_ack(integer idx) runs on CBSP_Adapter_CT { + [] CBSP[idx].receive(tr_CBSP_Recv(g_cbsp_conn_id[idx], tr_CBSP_KEEP_ALIVE)) { + CBSP[idx].send(ts_CBSP_Send(g_cbsp_conn_id[idx], ts_CBSP_KEEP_ALIVE_COMPL)); + } +} + +/* receive + ignore RESTART */ +altstep as_cbsp_restart(integer idx) runs on CBSP_Adapter_CT { + [] CBSP[idx].receive(tr_CBSP_Recv(g_cbsp_conn_id[idx], tr_CBSP_RESTART)); +} + +function f_cbsp_tx_write_compl(CBS_Message msg, integer idx := 0, + template (omit) BSSMAP_FIELD_CellIdentificationList tx_cell_list := omit, + template (omit) CBSP_IE_NumBcastComplList tx_compl_list := omit) +runs on BSC_ConnHdlr { + var template (value) CBSP_PDU tx; + var template (value) BSSMAP_FIELD_CellIdentificationList tx_list; + if (istemplatekind(tx_cell_list, "omit")) { + /* use the "expected list" when confirming the write-replace */ + tx_list := msg.cell_list; + } else { + /* use an user-provided different list of cells */ + tx_list := valueof(tx_cell_list); + } + if (istemplatekind(tx_compl_list, "omit")) { + if (msg_id_is_etws(msg.msg_id)) { + tx := ts_CBSP_WRITE_EMERG_COMPL(msg.msg_id, msg.ser_nr, tx_list); + } else { + tx := ts_CBSP_WRITE_CBS_COMPL(msg.msg_id, msg.ser_nr, tx_list, msg.channel_ind); + } + } else { + if (msg_id_is_etws(msg.msg_id)) { + tx := ts_CBSP_REPLACE_EMERG_COMPL(msg.msg_id, msg.ser_nr, msg.old_ser_nr, + tx_list); + } else { + tx := ts_CBSP_REPLACE_CBS_COMPL(msg.msg_id, msg.ser_nr, msg.old_ser_nr, + valueof(tx_compl_list), tx_list, + msg.channel_ind); + } + } + CBSP[idx].send(ts_CBSP_Send(g_cbsp_conn_id[idx], tx)); +} + +function f_cbsp_tx_write_fail(CBS_Message msg, integer idx := 0, + template (omit) BSSMAP_FIELD_CellIdentificationList tx_cell_list := omit, + template (omit) CBSP_IE_NumBcastComplList tx_compl_list := omit, + template (omit) CBSP_FailureListItems tx_fail_list := omit) +runs on BSC_ConnHdlr { + var template (value) CBSP_PDU tx; + tx := ts_CBSP_WRITE_CBS_FAIL(msg.msg_id, msg.ser_nr, valueof(tx_fail_list), + tx_compl_list, tx_cell_list, msg.channel_ind); + CBSP[idx].send(ts_CBSP_Send(g_cbsp_conn_id[idx], tx)); +} + +/* handle a CBSP-WRITE-REPLACE and respond to it with COMPLETE or FAILURE depending on arguments */ +function f_cbsp_handle_write(CBS_Message msg, integer idx := 0, + template (omit) BSSMAP_FIELD_CellIdentificationList tx_cell_list := omit, + template (omit) CBSP_FailureListItems tx_fail_list := omit, + template (omit) CBSP_IE_NumBcastComplList tx_compl_list := omit) +runs on BSC_ConnHdlr { + var template CBSP_IEs content_ies := {}; + var template (present) CBSP_PDU rx_templ; + var CBSP_RecvFrom rf; + if (msg_id_is_etws(msg.msg_id)) { + rx_templ := tr_CBSP_WRITE_EMERG(msg.msg_id, msg.ser_nr, msg.cell_list, 1, + hex2int('180'H) + (msg.msg_id - 4352), + msg.num_bcast_req, 0) + } else { + for (var integer i := 0; i < lengthof(msg.content); i := i+1) { + //content_ies[i] := tr_CbspMsgContent(msg.content[i].payload, msg.content[i].user_len); + content_ies[i] := tr_CbspMsgContent(?, ?); + } + rx_templ := tr_CBSP_WRITE_CBS(msg.msg_id, msg.ser_nr, msg.cell_list, msg.channel_ind, + msg.category, msg.rep_period, msg.num_bcast_req, msg.dcs, + content_ies); + } + alt { + [] CBSP[idx].receive(tr_CBSP_Recv(g_cbsp_conn_id[idx], rx_templ)) -> value rf { + var template (value) CBSP_PDU tx; + if (istemplatekind(tx_fail_list, "omit")) { + f_cbsp_tx_write_compl(msg, idx, tx_cell_list, tx_compl_list); + } else { + f_cbsp_tx_write_fail(msg, idx, tx_cell_list, tx_compl_list, tx_fail_list); + } + } + [] as_cbsp_keepalive_ack(idx) { repeat; } + [] CBSP[idx].receive { + setverdict(fail, "Received unexpected CBSP in index ", idx); + } + } +} + +/* handle a CBSP-KILL and respond to it with COMPLETE or FAILURE depending on arguments */ +function f_cbsp_handle_kill(integer idx, uint16_t msg_id, uint16_t ser_nr, + template BSSMAP_FIELD_CellIdentificationList exp_list, + template (omit) BSSMAP_FIELD_CellIdentificationList tx_list, + template (omit) CBSP_FailureListItems tx_fail_list := omit, + template (omit) CBSP_IE_NumBcastComplList tx_compl_list := omit, + template (omit) uint8_t channel_ind := omit) +runs on BSC_ConnHdlr { + var template (present) CBSP_PDU rx_templ; + var CBSP_RecvFrom rf; + + rx_templ := tr_CBSP_KILL(msg_id, ser_nr, exp_list, channel_ind); + alt { + [] CBSP[idx].receive(tr_CBSP_Recv(g_cbsp_conn_id[idx], rx_templ)) -> value rf { + var template (value) CBSP_PDU tx; + if (istemplatekind(tx_fail_list, "omit")) { + tx := ts_CBSP_KILL_COMPL(msg_id, ser_nr, tx_compl_list, tx_list, channel_ind); + } else { + tx := ts_CBSP_KILL_FAIL(msg_id, ser_nr, valueof(tx_fail_list), tx_compl_list, + tx_list, channel_ind); + } + CBSP[idx].send(ts_CBSP_Send(g_cbsp_conn_id[idx], tx)); + } + [] as_cbsp_keepalive_ack(idx) { repeat; } + [] CBSP[idx].receive { + setverdict(fail, "Received unexpected CBSP in index ", idx); + } + } +} + +} |