Pau Espin Pedrol | 4ff118a | 2022-07-28 17:37:47 +0200 | [diff] [blame^] | 1 | /* BSC (CBSP) Connection Handler of CBC test suite in TTCN-3 |
| 2 | * (C) 2022 by sysmocom - s.f.m.c. GmbH <info@sysmocom.de> |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Author: Pau Espin Pedrol <pespin@sysmocom.de> |
| 6 | * |
| 7 | * Released under the terms of GNU General Public License, Version 2 or |
| 8 | * (at your option) any later version. |
| 9 | * |
| 10 | * SPDX-License-Identifier: GPL-2.0-or-later |
| 11 | */ |
| 12 | |
| 13 | module BSC_ConnectionHandler { |
| 14 | |
| 15 | import from Osmocom_Types all; |
| 16 | |
| 17 | import from BSSAP_Types all; |
| 18 | import from BSSMAP_Templates all; |
| 19 | import from CBSP_Types all; |
| 20 | import from CBSP_Templates all; |
| 21 | import from CBSP_Adapter all; |
| 22 | import from CBSP_CodecPort all; |
| 23 | |
| 24 | import from CBS_Message all; |
| 25 | |
| 26 | type function void_fn() runs on BSC_ConnHdlr; |
| 27 | |
| 28 | /* this component represents a single subscriber connection */ |
| 29 | type component BSC_ConnHdlr extends CBSP_Adapter_CT { |
| 30 | var BSC_ConnHdlrPars g_pars; |
| 31 | } |
| 32 | |
| 33 | type record BSC_ConnHdlrPars { |
| 34 | integer bsc_cbsp_port, |
| 35 | charstring cbc_host, |
| 36 | integer cbc_cbsp_port, |
| 37 | void_fn start_fn, |
| 38 | CBS_Message exp_cbs_msg optional, |
| 39 | BSSMAP_FIELD_CellIdentificationList cell_list_success optional |
| 40 | }; |
| 41 | |
| 42 | function f_BSC_ConnHdlr_main(charstring id, BSC_ConnHdlrPars pars) runs on BSC_ConnHdlr { |
| 43 | g_pars := pars; |
| 44 | CBSP_Adapter.f_connect(g_pars.cbc_host, g_pars.cbc_cbsp_port, "", g_pars.bsc_cbsp_port); |
| 45 | |
| 46 | var BSSMAP_FIELD_CellIdentificationList cell_list := { |
| 47 | cIl_allInBSS := ''O |
| 48 | }; |
| 49 | activate(as_cbsp_keepalive_ack(0)); |
| 50 | activate(as_cbsp_restart(0)); |
| 51 | f_cbsp_send(ts_CBSP_RESTART(cell_list, CBSP_BC_MSGT_CBS, CBSP_RI_DATA_LOST)); |
| 52 | f_cbsp_send(ts_CBSP_RESTART(cell_list, CBSP_BC_MSGT_EMERG, CBSP_RI_DATA_LOST)); |
| 53 | as_cbsp_reset(0); |
| 54 | |
| 55 | g_pars.start_fn.apply(); |
| 56 | } |
| 57 | |
| 58 | altstep as_cbsp_reset(integer idx) runs on CBSP_Adapter_CT { |
| 59 | var CBSP_RecvFrom rf; |
| 60 | [] CBSP[idx].receive(tr_CBSP_Recv(g_cbsp_conn_id[idx], tr_CBSP_RESET)) -> value rf { |
| 61 | var CBSP_IE ie; |
| 62 | f_cbsp_find_ie(rf.msg, CBSP_IEI_CELL_LIST, ie); |
| 63 | CBSP[idx].send(ts_CBSP_Send(g_cbsp_conn_id[idx], |
| 64 | ts_CBSP_RESET_COMPL(ie.body.cell_list.cell_id))); |
| 65 | } |
| 66 | } |
| 67 | |
| 68 | /* receive + acknowledge KEEP-ALIVE */ |
| 69 | altstep as_cbsp_keepalive_ack(integer idx) runs on CBSP_Adapter_CT { |
| 70 | [] CBSP[idx].receive(tr_CBSP_Recv(g_cbsp_conn_id[idx], tr_CBSP_KEEP_ALIVE)) { |
| 71 | CBSP[idx].send(ts_CBSP_Send(g_cbsp_conn_id[idx], ts_CBSP_KEEP_ALIVE_COMPL)); |
| 72 | } |
| 73 | } |
| 74 | |
| 75 | /* receive + ignore RESTART */ |
| 76 | altstep as_cbsp_restart(integer idx) runs on CBSP_Adapter_CT { |
| 77 | [] CBSP[idx].receive(tr_CBSP_Recv(g_cbsp_conn_id[idx], tr_CBSP_RESTART)); |
| 78 | } |
| 79 | |
| 80 | function f_cbsp_tx_write_compl(CBS_Message msg, integer idx := 0, |
| 81 | template (omit) BSSMAP_FIELD_CellIdentificationList tx_cell_list := omit, |
| 82 | template (omit) CBSP_IE_NumBcastComplList tx_compl_list := omit) |
| 83 | runs on BSC_ConnHdlr { |
| 84 | var template (value) CBSP_PDU tx; |
| 85 | var template (value) BSSMAP_FIELD_CellIdentificationList tx_list; |
| 86 | if (istemplatekind(tx_cell_list, "omit")) { |
| 87 | /* use the "expected list" when confirming the write-replace */ |
| 88 | tx_list := msg.cell_list; |
| 89 | } else { |
| 90 | /* use an user-provided different list of cells */ |
| 91 | tx_list := valueof(tx_cell_list); |
| 92 | } |
| 93 | if (istemplatekind(tx_compl_list, "omit")) { |
| 94 | tx := ts_CBSP_WRITE_CBS_COMPL(msg.msg_id, msg.ser_nr, tx_list, msg.channel_ind); |
| 95 | } else { |
| 96 | tx := ts_CBSP_REPLACE_CBS_COMPL(msg.msg_id, msg.ser_nr, msg.old_ser_nr, |
| 97 | valueof(tx_compl_list), tx_list, |
| 98 | msg.channel_ind); |
| 99 | } |
| 100 | CBSP[idx].send(ts_CBSP_Send(g_cbsp_conn_id[idx], tx)); |
| 101 | } |
| 102 | |
| 103 | function f_cbsp_tx_write_fail(CBS_Message msg, integer idx := 0, |
| 104 | template (omit) BSSMAP_FIELD_CellIdentificationList tx_cell_list := omit, |
| 105 | template (omit) CBSP_FailureListItems tx_fail_list := omit) |
| 106 | runs on BSC_ConnHdlr { |
| 107 | var template (value) CBSP_PDU tx; |
| 108 | tx := ts_CBSP_WRITE_CBS_FAIL(msg.msg_id, msg.ser_nr, valueof(tx_fail_list), |
| 109 | omit, tx_cell_list, msg.channel_ind); |
| 110 | CBSP[idx].send(ts_CBSP_Send(g_cbsp_conn_id[idx], tx)); |
| 111 | } |
| 112 | |
| 113 | /* handle a CBSP-WRITE-REPLACE and respond to it with COMPLETE or FAILURE depending on arguments */ |
| 114 | function f_cbsp_handle_write(CBS_Message msg, integer idx := 0, |
| 115 | template (omit) BSSMAP_FIELD_CellIdentificationList tx_cell_list := omit, |
| 116 | template (omit) CBSP_FailureListItems tx_fail_list := omit, |
| 117 | template (omit) CBSP_IE_NumBcastComplList tx_compl_list := omit) |
| 118 | runs on BSC_ConnHdlr { |
| 119 | var template CBSP_IEs content_ies := {}; |
| 120 | var template (present) CBSP_PDU rx_templ; |
| 121 | var CBSP_RecvFrom rf; |
| 122 | for (var integer i := 0; i < lengthof(msg.content); i := i+1) { |
| 123 | //content_ies[i] := tr_CbspMsgContent(msg.content[i].payload, msg.content[i].user_len); |
| 124 | content_ies[i] := tr_CbspMsgContent(?, ?); |
| 125 | } |
| 126 | rx_templ := tr_CBSP_WRITE_CBS(msg.msg_id, msg.ser_nr, msg.cell_list, msg.channel_ind, |
| 127 | msg.category, msg.rep_period, msg.num_bcast_req, msg.dcs, |
| 128 | content_ies); |
| 129 | alt { |
| 130 | [] CBSP[idx].receive(tr_CBSP_Recv(g_cbsp_conn_id[idx], rx_templ)) -> value rf { |
| 131 | var template (value) CBSP_PDU tx; |
| 132 | if (istemplatekind(tx_fail_list, "omit")) { |
| 133 | f_cbsp_tx_write_compl(msg, idx, tx_cell_list, tx_compl_list); |
| 134 | } else { |
| 135 | f_cbsp_tx_write_fail(msg, idx, tx_cell_list, tx_fail_list); |
| 136 | } |
| 137 | } |
| 138 | [] as_cbsp_keepalive_ack(idx) { repeat; } |
| 139 | [] CBSP[idx].receive { |
| 140 | setverdict(fail, "Received unexpected CBSP in index ", idx); |
| 141 | } |
| 142 | } |
| 143 | } |
| 144 | |
| 145 | /* handle a CBSP-KILL and respond to it with COMPLETE or FAILURE depending on arguments */ |
| 146 | function f_cbsp_handle_kill(integer idx, uint16_t msg_id, uint16_t ser_nr, |
| 147 | template BSSMAP_FIELD_CellIdentificationList exp_list, |
| 148 | template (omit) BSSMAP_FIELD_CellIdentificationList tx_list, |
| 149 | template (omit) CBSP_FailureListItems tx_fail_list := omit, |
| 150 | template (omit) CBSP_IE_NumBcastComplList tx_compl_list := omit, |
| 151 | template (omit) uint8_t channel_ind := omit) |
| 152 | runs on BSC_ConnHdlr { |
| 153 | var template (present) CBSP_PDU rx_templ; |
| 154 | var CBSP_RecvFrom rf; |
| 155 | |
| 156 | rx_templ := tr_CBSP_KILL(msg_id, ser_nr, exp_list, channel_ind); |
| 157 | alt { |
| 158 | [] CBSP[idx].receive(tr_CBSP_Recv(g_cbsp_conn_id[idx], rx_templ)) -> value rf { |
| 159 | var template (value) CBSP_PDU tx; |
| 160 | if (istemplatekind(tx_fail_list, "omit")) { |
| 161 | tx := ts_CBSP_KILL_COMPL(msg_id, ser_nr, tx_compl_list, tx_list, channel_ind); |
| 162 | } else { |
| 163 | tx := ts_CBSP_KILL_FAIL(msg_id, ser_nr, valueof(tx_fail_list), tx_compl_list, |
| 164 | tx_list, channel_ind); |
| 165 | } |
| 166 | CBSP[idx].send(ts_CBSP_Send(g_cbsp_conn_id[idx], tx)); |
| 167 | } |
| 168 | [] as_cbsp_keepalive_ack(idx) { repeat; } |
| 169 | [] CBSP[idx].receive { |
| 170 | setverdict(fail, "Received unexpected CBSP in index ", idx); |
| 171 | } |
| 172 | } |
| 173 | } |
| 174 | |
| 175 | } |