Harald Welte | 714ded9 | 2017-12-08 14:00:22 +0100 | [diff] [blame] | 1 | module RSL_Emulation { |
| 2 | |
Harald Welte | 35bb716 | 2018-01-03 21:07:52 +0100 | [diff] [blame] | 3 | /* RSL Emulation, runs on top of IPA_Emulation. It multiplexes/demultiplexes |
| 4 | * the individual connections (logical channels), so there can be separate TTCN-3 components |
| 5 | * handling each of the connections. |
| 6 | * |
| 7 | * The RSL_Emulation.main() function processes RSL messages from the IPA demultiplex |
| 8 | * stack via the IPA_RSL_PT, and dispatches them to the per-connection components. |
| 9 | * |
| 10 | * Outbound RSL connections are initiated by sending a RSLDC_ChanRqd primitive |
| 11 | * to the component running the RSL_Emulation.main() function. |
| 12 | * |
Harald Welte | ad2647b | 2018-03-22 19:53:55 +0100 | [diff] [blame] | 13 | * in case we're emulating the BTS-side of RSL: We have no clue as to which particular logical |
| 14 | * channel the BSC may decide to activate at which point, so we have to blindly acknowledge all |
| 15 | * channel activations. Still, a test case might be interested in the exact assignment message to |
| 16 | * determine the type of activation, encryption, codec flags etc. at some later point, when it's |
| 17 | * clear for which transaction this activation happened. We keep this in the LastChanAct table. |
| 18 | * |
| 19 | * (C) 2017-2018 by Harald Welte <laforge@gnumonks.org> |
Harald Welte | 35bb716 | 2018-01-03 21:07:52 +0100 | [diff] [blame] | 20 | * All rights reserved. |
| 21 | * |
| 22 | * Released under the terms of GNU General Public License, Version 2 or |
| 23 | * (at your option) any later version. |
Harald Welte | 34b5a95 | 2019-05-27 11:54:11 +0200 | [diff] [blame] | 24 | * |
| 25 | * SPDX-License-Identifier: GPL-2.0-or-later |
Harald Welte | 35bb716 | 2018-01-03 21:07:52 +0100 | [diff] [blame] | 26 | */ |
| 27 | |
Pau Espin Pedrol | a07cfd9 | 2018-10-22 15:54:41 +0200 | [diff] [blame] | 28 | import from Misc_Helpers all; |
Harald Welte | 714ded9 | 2017-12-08 14:00:22 +0100 | [diff] [blame] | 29 | import from General_Types all; |
| 30 | import from Osmocom_Types all; |
| 31 | import from GSM_Types all; |
| 32 | import from GSM_RR_Types all; |
| 33 | import from RSL_Types all; |
| 34 | import from IPA_Types all; |
| 35 | import from IPA_Emulation all; |
| 36 | |
| 37 | |
| 38 | /* General "base class" component definition, of which specific implementations |
| 39 | * derive themselves by means of the "extends" feature */ |
| 40 | type component RSL_DchanHdlr { |
| 41 | /* port facing up towards dedicated channel handler */ |
| 42 | port RSL_DCHAN_PT RSL; |
Harald Welte | f70df65 | 2018-01-29 22:00:23 +0100 | [diff] [blame] | 43 | port RSLEM_PROC_PT RSL_PROC; |
Harald Welte | 714ded9 | 2017-12-08 14:00:22 +0100 | [diff] [blame] | 44 | var RslChannelNr g_chan_nr; |
Harald Welte | 421e4d4 | 2018-02-12 20:04:50 +0100 | [diff] [blame] | 45 | /* second BTS / DChan during hand-over */ |
| 46 | port RSL_DCHAN_PT RSL1; |
| 47 | port RSLEM_PROC_PT RSL1_PROC; |
Harald Welte | 714ded9 | 2017-12-08 14:00:22 +0100 | [diff] [blame] | 48 | }; |
| 49 | |
| 50 | type record RSLDC_ChanRqd { |
| 51 | OCT1 ra, |
Pau Espin Pedrol | 6451b04 | 2018-10-24 20:36:16 +0200 | [diff] [blame] | 52 | GsmFrameNumber fn optional |
Harald Welte | 714ded9 | 2017-12-08 14:00:22 +0100 | [diff] [blame] | 53 | }; |
| 54 | |
Pau Espin Pedrol | 6451b04 | 2018-10-24 20:36:16 +0200 | [diff] [blame] | 55 | template (value) RSLDC_ChanRqd ts_RSLDC_ChanRqd(OCT1 ra, GsmFrameNumber fn) := { |
Harald Welte | 714ded9 | 2017-12-08 14:00:22 +0100 | [diff] [blame] | 56 | ra := ra, |
| 57 | fn := fn |
| 58 | } |
| 59 | |
Pau Espin Pedrol | 6451b04 | 2018-10-24 20:36:16 +0200 | [diff] [blame] | 60 | template (value) RSLDC_ChanRqd ts_RSLDC_ChanRqd_anyFN(OCT1 ra) := { |
| 61 | ra := ra, |
| 62 | fn := omit |
| 63 | } |
| 64 | |
Harald Welte | 714ded9 | 2017-12-08 14:00:22 +0100 | [diff] [blame] | 65 | type port RSL_DCHAN_PT message { |
| 66 | inout RSLDC_ChanRqd, RSL_Message; |
| 67 | } with { extension "internal" }; |
| 68 | |
Harald Welte | 1c02fd1 | 2018-02-19 19:20:47 +0100 | [diff] [blame] | 69 | type port RSL_CCHAN_PT message { |
Harald Welte | bb6aed3 | 2018-02-21 12:19:18 +0100 | [diff] [blame] | 70 | inout ASP_RSL_Unitdata, ASP_IPA_Event; |
Harald Welte | 1c02fd1 | 2018-02-19 19:20:47 +0100 | [diff] [blame] | 71 | } with { extension "internal" }; |
| 72 | |
| 73 | |
Harald Welte | f70df65 | 2018-01-29 22:00:23 +0100 | [diff] [blame] | 74 | signature RSLEM_register(uint8_t trx_nr, RslChannelNr chan_nr, RSL_DchanHdlr hdlr); |
Harald Welte | 1909f46 | 2018-01-29 22:29:29 +0100 | [diff] [blame] | 75 | signature RSLEM_unregister(uint8_t trx_nr, RslChannelNr chan_nr, RSL_DchanHdlr hdlr); |
Harald Welte | 70b52c9 | 2018-02-12 20:47:31 +0100 | [diff] [blame] | 76 | signature RSLEM_suspend(boolean suspend); |
Harald Welte | ad2647b | 2018-03-22 19:53:55 +0100 | [diff] [blame] | 77 | signature RSLEM_get_last_act(in uint8_t trx_nr, in RslChannelNr chan_nr, out RSL_Message chan_act); |
Harald Welte | f70df65 | 2018-01-29 22:00:23 +0100 | [diff] [blame] | 78 | |
| 79 | type port RSLEM_PROC_PT procedure { |
Harald Welte | ad2647b | 2018-03-22 19:53:55 +0100 | [diff] [blame] | 80 | inout RSLEM_register, RSLEM_unregister, RSLEM_suspend, RSLEM_get_last_act; |
Harald Welte | f70df65 | 2018-01-29 22:00:23 +0100 | [diff] [blame] | 81 | } with { extension "internal" }; |
| 82 | |
Harald Welte | 714ded9 | 2017-12-08 14:00:22 +0100 | [diff] [blame] | 83 | /*********************************************************************** |
| 84 | * Client Component for a single dedicated channel |
| 85 | ***********************************************************************/ |
| 86 | |
| 87 | private function f_rx_or_fail(template RSL_Message exp_rx) runs on RSL_DchanHdlr return RSL_Message |
| 88 | { |
| 89 | var RSL_Message rx_rsl; |
| 90 | timer T := 10.0; |
| 91 | |
| 92 | /* request a channel to be established */ |
| 93 | T.start; |
| 94 | alt { |
| 95 | [] RSL.receive(exp_rx) -> value rx_rsl { |
| 96 | T.stop; |
| 97 | return rx_rsl; |
| 98 | } |
| 99 | [] RSL.receive { |
| 100 | setverdict(fail, "Unexpected RSL message on DCHAN"); |
Daniel Willmann | e4ff537 | 2018-07-05 17:35:03 +0200 | [diff] [blame] | 101 | mtc.stop; |
Harald Welte | 714ded9 | 2017-12-08 14:00:22 +0100 | [diff] [blame] | 102 | } |
| 103 | [] T.timeout { |
| 104 | setverdict(fail, "Timeout waiting for RSL on DCHAN"); |
Daniel Willmann | e4ff537 | 2018-07-05 17:35:03 +0200 | [diff] [blame] | 105 | mtc.stop; |
Harald Welte | 714ded9 | 2017-12-08 14:00:22 +0100 | [diff] [blame] | 106 | } |
| 107 | } |
| 108 | /* never reached */ |
| 109 | return rx_rsl; |
| 110 | } |
| 111 | |
| 112 | /* establish a dedicated channel using 'ra' */ |
| 113 | function f_chan_est(OCT1 ra, octetstring est_l3, template RslLinkId link_id, GsmFrameNumber fn := 23) |
| 114 | runs on RSL_DchanHdlr { |
| 115 | var RSL_Message rx_rsl; |
| 116 | var GsmRrMessage rr; |
| 117 | |
| 118 | /* request a channel to be established */ |
| 119 | RSL.send(ts_RSLDC_ChanRqd(ra, fn)); |
| 120 | /* expect immediate assignment */ |
| 121 | rx_rsl := f_rx_or_fail(tr_RSL_IMM_ASSIGN); |
| 122 | rr := dec_GsmRrMessage(rx_rsl.ies[1].body.full_imm_ass_info.payload); |
| 123 | g_chan_nr := rr.payload.imm_ass.chan_desc.chan_nr; |
| 124 | RSL.send(ts_RSL_EST_IND(g_chan_nr, valueof(link_id), est_l3)); |
| 125 | } |
| 126 | |
| 127 | function f_deact_chan(RSL_Cause cause) runs on RSL_DchanHdlr |
| 128 | { |
| 129 | var RSL_Message rx_rsl; |
| 130 | |
| 131 | RSL.send(ts_RSL_CONN_FAIL_IND(g_chan_nr, cause)); |
| 132 | rx_rsl := f_rx_or_fail(tr_RSL_MsgTypeD(RSL_MT_RF_CHAN_REL)); |
| 133 | /* FIXME RSL.send(ts_RSL_RF_CHAN_REL_ACK()) */ |
| 134 | } |
| 135 | |
| 136 | |
| 137 | |
| 138 | /*********************************************************************** |
| 139 | * Main Component |
| 140 | ***********************************************************************/ |
| 141 | |
| 142 | private type record ConnectionData { |
| 143 | /* component reference to the client component */ |
| 144 | RSL_DchanHdlr comp_ref, |
| 145 | /* RSL (dedicated) Channel number we're handling */ |
| 146 | uint8_t trx_nr optional, |
| 147 | IpaStreamId stream_id optional, |
| 148 | RslChannelNr chan_nr optional, |
| 149 | /* Random Reference */ |
| 150 | OCT1 ra optional, |
| 151 | GsmFrameNumber ra_fn optional |
| 152 | }; |
| 153 | |
| 154 | private function f_cid_by_comp_ref(RSL_DchanHdlr comp_ref) |
| 155 | runs on RSL_Emulation_CT return integer { |
| 156 | var integer i; |
| 157 | for (i := 0; i < sizeof(ConnectionTable); i := i+1) { |
| 158 | if (ispresent(ConnectionTable[i].comp_ref) and |
| 159 | ConnectionTable[i].comp_ref == comp_ref) { |
| 160 | return i; |
| 161 | } |
| 162 | } |
| 163 | log("No Dchan handler for ", comp_ref); |
| 164 | return -1; |
| 165 | } |
| 166 | |
| 167 | private function f_cid_by_chan_nr(uint8_t trx_nr, RslChannelNr chan_nr) |
| 168 | runs on RSL_Emulation_CT return integer { |
| 169 | var integer i; |
| 170 | for (i := 0; i < sizeof(ConnectionTable); i := i+1) { |
| 171 | if (ispresent(ConnectionTable[i].chan_nr) and |
| 172 | ConnectionTable[i].chan_nr == chan_nr and ConnectionTable[i].trx_nr == trx_nr) { |
| 173 | return i; |
| 174 | } |
| 175 | } |
| 176 | log("No Dchan handler for ", trx_nr, chan_nr); |
| 177 | return -1; |
| 178 | } |
| 179 | |
| 180 | private function f_cid_by_ra_fn(OCT1 ra, GsmFrameNumber fn) |
| 181 | runs on RSL_Emulation_CT return integer { |
| 182 | var integer i; |
| 183 | for (i := 0; i < sizeof(ConnectionTable); i := i+1) { |
| 184 | if (ispresent(ConnectionTable[i].ra) and |
| 185 | ConnectionTable[i].ra == ra and ConnectionTable[i].ra_fn == fn) { |
| 186 | return i; |
| 187 | } |
| 188 | } |
| 189 | log("No Dchan handler for ", ra, fn); |
| 190 | return -1; |
| 191 | } |
| 192 | |
Pau Espin Pedrol | 6451b04 | 2018-10-24 20:36:16 +0200 | [diff] [blame] | 193 | /* Matches by only RA if FN is ommited in one of the connections allocated */ |
| 194 | private function f_cid_by_ra_fn2(OCT1 ra, RSL_IE_FrameNumber fn) |
| 195 | runs on RSL_Emulation_CT return integer { |
| 196 | var integer i; |
| 197 | for (i := 0; i < sizeof(ConnectionTable); i := i+1) { |
| 198 | if (ispresent(ConnectionTable[i].ra) and |
| 199 | ConnectionTable[i].ra == ra) { |
| 200 | if (not ispresent(ConnectionTable[i].ra_fn) or |
| 201 | fn == valueof(ts_RSL_IE_FrameNumber(ConnectionTable[i].ra_fn))) { |
| 202 | return i; |
| 203 | } |
| 204 | } |
| 205 | } |
| 206 | log("No Dchan handler for ", ra, fn); |
| 207 | return -1; |
| 208 | } |
| 209 | |
Harald Welte | 714ded9 | 2017-12-08 14:00:22 +0100 | [diff] [blame] | 210 | /* create an ew client with given RA and FN */ |
Pau Espin Pedrol | 6451b04 | 2018-10-24 20:36:16 +0200 | [diff] [blame] | 211 | private function f_cid_create(OCT1 ra, template (omit) GsmFrameNumber fn, RSL_DchanHdlr comp_ref) |
Harald Welte | 930d0a7 | 2018-03-22 22:08:40 +0100 | [diff] [blame] | 212 | runs on RSL_Emulation_CT { |
Harald Welte | 714ded9 | 2017-12-08 14:00:22 +0100 | [diff] [blame] | 213 | var integer i; |
| 214 | for (i := 0; i < sizeof(ConnectionTable); i := i+1) { |
Harald Welte | f70df65 | 2018-01-29 22:00:23 +0100 | [diff] [blame] | 215 | if (not ispresent(ConnectionTable[i].ra) and |
| 216 | not ispresent(ConnectionTable[i].trx_nr)) { |
Harald Welte | 714ded9 | 2017-12-08 14:00:22 +0100 | [diff] [blame] | 217 | ConnectionTable[i].ra := ra; |
Pau Espin Pedrol | 6451b04 | 2018-10-24 20:36:16 +0200 | [diff] [blame] | 218 | if (ispresent(fn)) { |
| 219 | ConnectionTable[i].ra_fn := valueof(fn); |
| 220 | } else { |
| 221 | ConnectionTable[i].ra_fn := omit; |
| 222 | } |
Harald Welte | 714ded9 | 2017-12-08 14:00:22 +0100 | [diff] [blame] | 223 | ConnectionTable[i].comp_ref := comp_ref; |
Harald Welte | 930d0a7 | 2018-03-22 22:08:40 +0100 | [diff] [blame] | 224 | return; |
Harald Welte | 714ded9 | 2017-12-08 14:00:22 +0100 | [diff] [blame] | 225 | } |
| 226 | } |
Daniel Willmann | 8273fb9 | 2018-07-05 17:31:20 +0200 | [diff] [blame] | 227 | testcase.stop("No free entry in conn table for ", ra, fn); |
Harald Welte | 714ded9 | 2017-12-08 14:00:22 +0100 | [diff] [blame] | 228 | } |
| 229 | |
Harald Welte | f70df65 | 2018-01-29 22:00:23 +0100 | [diff] [blame] | 230 | /* create an ew client with given RA and FN */ |
| 231 | private function f_cid_create_cnr(uint8_t trx_nr, RslChannelNr chan_nr, RSL_DchanHdlr comp_ref) |
Harald Welte | 930d0a7 | 2018-03-22 22:08:40 +0100 | [diff] [blame] | 232 | runs on RSL_Emulation_CT { |
Harald Welte | f70df65 | 2018-01-29 22:00:23 +0100 | [diff] [blame] | 233 | var integer i; |
| 234 | for (i := 0; i < sizeof(ConnectionTable); i := i+1) { |
| 235 | if (not ispresent(ConnectionTable[i].ra) and |
| 236 | not ispresent(ConnectionTable[i].trx_nr)) { |
| 237 | ConnectionTable[i].stream_id := f_streamId_by_trx(trx_nr); |
| 238 | ConnectionTable[i].trx_nr := trx_nr; |
| 239 | ConnectionTable[i].chan_nr := chan_nr; |
| 240 | ConnectionTable[i].comp_ref := comp_ref; |
Harald Welte | 930d0a7 | 2018-03-22 22:08:40 +0100 | [diff] [blame] | 241 | return; |
Harald Welte | f70df65 | 2018-01-29 22:00:23 +0100 | [diff] [blame] | 242 | } |
| 243 | } |
Daniel Willmann | 8273fb9 | 2018-07-05 17:31:20 +0200 | [diff] [blame] | 244 | testcase.stop("No free entry in conn table for ", trx_nr, chan_nr, comp_ref); |
Harald Welte | f70df65 | 2018-01-29 22:00:23 +0100 | [diff] [blame] | 245 | } |
| 246 | |
| 247 | |
| 248 | /* create an ew client with given RA and FN */ |
| 249 | private function f_cid_delete_cnr(IpaStreamId stream_id, RslChannelNr chan_nr, RSL_DchanHdlr comp_ref) |
| 250 | runs on RSL_Emulation_CT return integer { |
| 251 | var integer i; |
| 252 | for (i := 0; i < sizeof(ConnectionTable); i := i+1) { |
| 253 | if (ConnectionTable[i].comp_ref == null) { |
| 254 | continue; |
| 255 | } |
| 256 | if (ConnectionTable[i].stream_id == stream_id and |
| 257 | ConnectionTable[i].chan_nr == chan_nr and |
| 258 | ConnectionTable[i].comp_ref == comp_ref) { |
| 259 | f_cid_clear(i); |
| 260 | } |
| 261 | } |
| 262 | log("Unable to find entry to delete for ", stream_id, chan_nr, comp_ref); |
| 263 | return -1; |
| 264 | } |
| 265 | |
| 266 | |
Harald Welte | 714ded9 | 2017-12-08 14:00:22 +0100 | [diff] [blame] | 267 | private function f_cid_clear(integer cid) |
| 268 | runs on RSL_Emulation_CT { |
| 269 | ConnectionTable[cid].ra := omit; |
| 270 | ConnectionTable[cid].ra_fn := omit; |
Harald Welte | 714ded9 | 2017-12-08 14:00:22 +0100 | [diff] [blame] | 271 | ConnectionTable[cid].trx_nr := omit; |
| 272 | ConnectionTable[cid].stream_id := omit; |
| 273 | ConnectionTable[cid].chan_nr := omit; |
Harald Welte | f70df65 | 2018-01-29 22:00:23 +0100 | [diff] [blame] | 274 | ConnectionTable[cid].comp_ref := null; |
Harald Welte | 714ded9 | 2017-12-08 14:00:22 +0100 | [diff] [blame] | 275 | } |
| 276 | |
Harald Welte | ad2647b | 2018-03-22 19:53:55 +0100 | [diff] [blame] | 277 | /* last activation for a given channel number */ |
| 278 | type record LastActData { |
| 279 | uint8_t trx_nr optional, |
| 280 | RslChannelNr chan_nr optional, |
| 281 | RSL_Message chan_act optional |
| 282 | } |
| 283 | |
| 284 | private function f_store_last_act_data(uint8_t trx_nr, RslChannelNr chan_nr, RSL_Message chan_act) |
| 285 | runs on RSL_Emulation_CT { |
| 286 | for (var integer i := 0; i < sizeof(LastActTable); i := i+1) { |
| 287 | if (not ispresent(LastActTable[i].chan_nr) or |
| 288 | (LastActTable[i].chan_nr == chan_nr and LastActTable[i].trx_nr == trx_nr)) { |
| 289 | LastActTable[i].trx_nr := trx_nr; |
| 290 | LastActTable[i].chan_nr := chan_nr; |
| 291 | LastActTable[i].chan_act := chan_act; |
| 292 | return; |
| 293 | } |
| 294 | } |
Daniel Willmann | 8273fb9 | 2018-07-05 17:31:20 +0200 | [diff] [blame] | 295 | testcase.stop("No space left in LastActTable to store chan_act for ", chan_nr); |
Harald Welte | ad2647b | 2018-03-22 19:53:55 +0100 | [diff] [blame] | 296 | } |
| 297 | |
| 298 | private function f_lookup_last_act(uint8_t trx_nr, RslChannelNr chan_nr) |
| 299 | runs on RSL_Emulation_CT return RSL_Message { |
| 300 | for (var integer i := 0; i < sizeof(LastActTable); i := i+1) { |
| 301 | if (ispresent(LastActTable[i].chan_nr) and LastActTable[i].chan_nr == chan_nr |
| 302 | and LastActTable[i].trx_nr == trx_nr) { |
| 303 | return LastActTable[i].chan_act; |
| 304 | } |
| 305 | } |
Daniel Willmann | 8273fb9 | 2018-07-05 17:31:20 +0200 | [diff] [blame] | 306 | testcase.stop("No LastActTable entry found for TRX ", trx_nr, " ", chan_nr); |
Harald Welte | ad2647b | 2018-03-22 19:53:55 +0100 | [diff] [blame] | 307 | } |
| 308 | |
| 309 | private function f_last_act_table_init() runs on RSL_Emulation_CT { |
| 310 | for (var integer i := 0; i < sizeof(LastActTable); i := i+1) { |
| 311 | LastActTable[i] := { omit, omit, omit }; |
| 312 | } |
| 313 | } |
| 314 | |
Harald Welte | 714ded9 | 2017-12-08 14:00:22 +0100 | [diff] [blame] | 315 | type component RSL_Emulation_CT { |
| 316 | /* port facing down towards IPA emulation */ |
| 317 | port IPA_RSL_PT IPA_PT; |
| 318 | /* port facing up towards dedicated channel handler */ |
| 319 | port RSL_DCHAN_PT CLIENT_PT; |
Harald Welte | f70df65 | 2018-01-29 22:00:23 +0100 | [diff] [blame] | 320 | port RSLEM_PROC_PT RSL_PROC; |
Harald Welte | 714ded9 | 2017-12-08 14:00:22 +0100 | [diff] [blame] | 321 | |
Harald Welte | 1c02fd1 | 2018-02-19 19:20:47 +0100 | [diff] [blame] | 322 | /* port for Common Channel / TRX Management */ |
| 323 | port RSL_CCHAN_PT CCHAN_PT; |
| 324 | |
Harald Welte | 714ded9 | 2017-12-08 14:00:22 +0100 | [diff] [blame] | 325 | /* state of all concurrent connections / dedicated channels */ |
| 326 | var ConnectionData ConnectionTable[64]; |
Harald Welte | ad2647b | 2018-03-22 19:53:55 +0100 | [diff] [blame] | 327 | |
| 328 | /* last RSL CHAN ACT for each chan_nr */ |
| 329 | var LastActData LastActTable[64]; |
Harald Welte | 714ded9 | 2017-12-08 14:00:22 +0100 | [diff] [blame] | 330 | } |
| 331 | |
| 332 | |
| 333 | /* template for an ASP_RSL_Unitdata as we receive it from the IPA_Emulateion component */ |
| 334 | private template ASP_RSL_Unitdata tr_RSL(template RSL_Message rsl, template IpaStreamId sid := ?) := { |
| 335 | streamId := sid, |
| 336 | rsl := rsl |
| 337 | } |
| 338 | |
Harald Welte | 714ded9 | 2017-12-08 14:00:22 +0100 | [diff] [blame] | 339 | private function f_trx_by_streamId(IpaStreamId id) return integer { |
| 340 | return enum2int(id); |
| 341 | } |
| 342 | |
Harald Welte | f70df65 | 2018-01-29 22:00:23 +0100 | [diff] [blame] | 343 | private function f_streamId_by_trx(uint8_t trx_nr) return IpaStreamId { |
| 344 | select (trx_nr) { |
| 345 | case (0) { return IPAC_PROTO_RSL_TRX0; } |
| 346 | case (1) { return IPAC_PROTO_RSL_TRX1; } |
| 347 | case (2) { return IPAC_PROTO_RSL_TRX2; } |
| 348 | case (3) { return IPAC_PROTO_RSL_TRX3; } |
| 349 | } |
Daniel Willmann | a6ea2ef | 2018-07-24 09:55:52 +0200 | [diff] [blame] | 350 | setverdict(fail, "Unknown stream ID ", trx_nr); |
| 351 | mtc.stop; |
Harald Welte | f70df65 | 2018-01-29 22:00:23 +0100 | [diff] [blame] | 352 | } |
| 353 | |
Harald Welte | 714ded9 | 2017-12-08 14:00:22 +0100 | [diff] [blame] | 354 | |
Harald Welte | 1c02fd1 | 2018-02-19 19:20:47 +0100 | [diff] [blame] | 355 | function main(boolean bts_role := true) runs on RSL_Emulation_CT { |
Harald Welte | bb6aed3 | 2018-02-21 12:19:18 +0100 | [diff] [blame] | 356 | var ASP_IPA_Event evt; |
Harald Welte | 714ded9 | 2017-12-08 14:00:22 +0100 | [diff] [blame] | 357 | var ASP_RSL_Unitdata rx_rsl; |
| 358 | var RSL_Message rx_rsl_msg; |
| 359 | var RSLDC_ChanRqd chan_rqd; |
| 360 | var RSL_DchanHdlr vc_conn; |
Harald Welte | f70df65 | 2018-01-29 22:00:23 +0100 | [diff] [blame] | 361 | var RslChannelNr chan_nr; |
| 362 | var uint8_t trx_nr; |
Harald Welte | 714ded9 | 2017-12-08 14:00:22 +0100 | [diff] [blame] | 363 | var integer cid; |
| 364 | var integer i; |
Harald Welte | 70b52c9 | 2018-02-12 20:47:31 +0100 | [diff] [blame] | 365 | /* special synchronization handling during hand-over */ |
| 366 | var boolean dchan_suspended := false; |
Harald Welte | 714ded9 | 2017-12-08 14:00:22 +0100 | [diff] [blame] | 367 | |
Daniel Willmann | 17f970f | 2018-01-17 12:03:19 +0100 | [diff] [blame] | 368 | f_conn_table_init(); |
Harald Welte | ad2647b | 2018-03-22 19:53:55 +0100 | [diff] [blame] | 369 | f_last_act_table_init(); |
Daniel Willmann | 17f970f | 2018-01-17 12:03:19 +0100 | [diff] [blame] | 370 | |
Harald Welte | 714ded9 | 2017-12-08 14:00:22 +0100 | [diff] [blame] | 371 | while (true) { |
| 372 | alt { |
Harald Welte | bb6aed3 | 2018-02-21 12:19:18 +0100 | [diff] [blame] | 373 | [bts_role] IPA_PT.receive(ASP_IPA_Event:{up_down := ASP_IPA_EVENT_UP}) { |
| 374 | } |
| 375 | [not bts_role] IPA_PT.receive(ASP_IPA_Event:{up_down := ASP_IPA_EVENT_UP}) -> value evt { |
| 376 | CCHAN_PT.send(evt); |
Harald Welte | 624f963 | 2017-12-16 19:26:04 +0100 | [diff] [blame] | 377 | } |
Pau Espin Pedrol | a07cfd9 | 2018-10-22 15:54:41 +0200 | [diff] [blame] | 378 | [bts_role] IPA_PT.receive(ASP_IPA_Event:{up_down := ASP_IPA_EVENT_DOWN}) { |
| 379 | Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, "Lost IPA connection!"); |
| 380 | |
| 381 | } |
| 382 | [not bts_role] IPA_PT.receive(ASP_IPA_Event:{up_down := ASP_IPA_EVENT_DOWN}) { |
| 383 | Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, "Lost IPA connection!"); |
| 384 | } |
Harald Welte | 1c02fd1 | 2018-02-19 19:20:47 +0100 | [diff] [blame] | 385 | [bts_role] IPA_PT.receive(ASP_IPA_Event:{up_down := ASP_IPA_EVENT_ID_ACK}) { |
Harald Welte | 7ae019e | 2017-12-09 00:54:15 +0100 | [diff] [blame] | 386 | IPA_PT.send(ts_ASP_RSL_UD(IPAC_PROTO_RSL_TRX0,ts_RSL_PAGING_LOAD_IND(23))); |
Harald Welte | 714ded9 | 2017-12-08 14:00:22 +0100 | [diff] [blame] | 387 | } |
Harald Welte | d879e2f | 2018-05-27 20:22:13 +0200 | [diff] [blame] | 388 | [not bts_role] IPA_PT.receive(ASP_IPA_Event:{up_down := ASP_IPA_EVENT_ID_ACK}) { } |
Harald Welte | 1c02fd1 | 2018-02-19 19:20:47 +0100 | [diff] [blame] | 389 | [bts_role] IPA_PT.receive(tr_RSL(tr_RSL_IMM_ASSIGN)) -> value rx_rsl { |
Harald Welte | 714ded9 | 2017-12-08 14:00:22 +0100 | [diff] [blame] | 390 | var GsmRrMessage rr; |
| 391 | var OCT1 ra; |
| 392 | var GsmFrameNumber fn; |
Harald Welte | 714ded9 | 2017-12-08 14:00:22 +0100 | [diff] [blame] | 393 | rr := dec_GsmRrMessage(rx_rsl.rsl.ies[1].body.full_imm_ass_info.payload); |
| 394 | if (ischosen(rr.payload.imm_ass)) { |
| 395 | ra := bit2oct(rr.payload.imm_ass.req_ref.ra); |
| 396 | fn := 23; //FIXME(rr.payload.imm_ass); |
| 397 | /* lookup client based on RA+time, deliver to client */ |
| 398 | cid := f_cid_by_ra_fn(ra, fn); |
| 399 | if (cid == -1) { |
| 400 | setverdict(fail, "IMM ASS for unknown DChan"); |
Daniel Willmann | e4ff537 | 2018-07-05 17:35:03 +0200 | [diff] [blame] | 401 | mtc.stop; |
Harald Welte | 714ded9 | 2017-12-08 14:00:22 +0100 | [diff] [blame] | 402 | } |
| 403 | /* update client with trx_nr */ |
| 404 | ConnectionTable[cid].trx_nr := f_trx_by_streamId(rx_rsl.streamId); |
| 405 | ConnectionTable[cid].stream_id := rx_rsl.streamId; |
| 406 | /* update client with chan_nr */ |
| 407 | ConnectionTable[cid].chan_nr := rr.payload.imm_ass.chan_desc.chan_nr; |
| 408 | /* TODO: add timer to time-out ConnectionTable entries which |
| 409 | * never get followed-up to */ |
| 410 | CLIENT_PT.send(rx_rsl.rsl) to ConnectionTable[cid].comp_ref; |
| 411 | } else if (ischosen(rr.payload.imm_ass_rej)) { |
| 412 | for (i := 0; i < sizeof(rr.payload.imm_ass_rej.payload); i := i + 1) { |
| 413 | ra := bit2oct(rr.payload.imm_ass_rej.payload[i].req_ref.ra); |
| 414 | fn := 23; //FIXME(); |
| 415 | /* lookup client based on RA+time, deliver to client */ |
| 416 | cid := f_cid_by_ra_fn(ra, fn); |
| 417 | if (cid != -1) { |
| 418 | CLIENT_PT.send(rx_rsl.rsl) to ConnectionTable[cid].comp_ref; |
| 419 | /* delete ClientTable entry, as it failed */ |
| 420 | f_cid_clear(cid); |
| 421 | } |
| 422 | } |
| 423 | } |
| 424 | } |
Pau Espin Pedrol | 6451b04 | 2018-10-24 20:36:16 +0200 | [diff] [blame] | 425 | [not bts_role] IPA_PT.receive(tr_RSL(tr_RSL_CHAN_RQD(?))) -> value rx_rsl { |
| 426 | var RSL_IE_RequestRef req_ref; |
| 427 | req_ref := rx_rsl.rsl.ies[1].body.req_ref; |
| 428 | cid := f_cid_by_ra_fn2(req_ref.ra, req_ref.frame_nr); |
| 429 | if (cid != -1) { |
| 430 | CLIENT_PT.send(rx_rsl.rsl) to ConnectionTable[cid].comp_ref; |
| 431 | f_cid_clear(cid); |
| 432 | } else { |
| 433 | CCHAN_PT.send(rx_rsl); |
| 434 | } |
| 435 | } |
Harald Welte | 714ded9 | 2017-12-08 14:00:22 +0100 | [diff] [blame] | 436 | |
Harald Welte | 1c02fd1 | 2018-02-19 19:20:47 +0100 | [diff] [blame] | 437 | [bts_role] IPA_PT.receive(tr_RSL(tr_RSL_PAGING_CMD(?, ?))) -> value rx_rsl { |
Harald Welte | 714ded9 | 2017-12-08 14:00:22 +0100 | [diff] [blame] | 438 | /* broadcast to all clients? */ |
| 439 | for (i := 0; i < sizeof(ConnectionTable); i := i + 1) { |
| 440 | if (ispresent(ConnectionTable[i].comp_ref)) { |
| 441 | CLIENT_PT.send(rx_rsl.rsl) to ConnectionTable[i].comp_ref; |
| 442 | } |
| 443 | } |
| 444 | } |
| 445 | |
Harald Welte | 1c02fd1 | 2018-02-19 19:20:47 +0100 | [diff] [blame] | 446 | /* Forward common channel management to the special port for it */ |
Harald Welte | 714ded9 | 2017-12-08 14:00:22 +0100 | [diff] [blame] | 447 | [] IPA_PT.receive(tr_RSL(tr_RSL_MsgTypeT(?))) -> value rx_rsl { |
Harald Welte | 1c02fd1 | 2018-02-19 19:20:47 +0100 | [diff] [blame] | 448 | CCHAN_PT.send(rx_rsl); |
Harald Welte | 714ded9 | 2017-12-08 14:00:22 +0100 | [diff] [blame] | 449 | } |
| 450 | |
Harald Welte | 1c02fd1 | 2018-02-19 19:20:47 +0100 | [diff] [blame] | 451 | /* Forward common channel management to the special port for it */ |
Harald Welte | 714ded9 | 2017-12-08 14:00:22 +0100 | [diff] [blame] | 452 | [] IPA_PT.receive(tr_RSL(tr_RSL_MsgTypeC(?))) -> value rx_rsl { |
Harald Welte | 1c02fd1 | 2018-02-19 19:20:47 +0100 | [diff] [blame] | 453 | CCHAN_PT.send(rx_rsl); |
Harald Welte | 714ded9 | 2017-12-08 14:00:22 +0100 | [diff] [blame] | 454 | } |
| 455 | |
| 456 | /* blindly acknowledge all channel activations */ |
Harald Welte | 1c02fd1 | 2018-02-19 19:20:47 +0100 | [diff] [blame] | 457 | [bts_role] IPA_PT.receive(tr_RSL(tr_RSL_MsgTypeD(RSL_MT_CHAN_ACTIV))) -> value rx_rsl { |
Harald Welte | f70df65 | 2018-01-29 22:00:23 +0100 | [diff] [blame] | 458 | chan_nr := rx_rsl.rsl.ies[0].body.chan_nr; |
Harald Welte | ad2647b | 2018-03-22 19:53:55 +0100 | [diff] [blame] | 459 | trx_nr := f_trx_by_streamId(rx_rsl.streamId); |
| 460 | f_store_last_act_data(trx_nr, chan_nr, rx_rsl.rsl); |
Harald Welte | 7ae019e | 2017-12-09 00:54:15 +0100 | [diff] [blame] | 461 | IPA_PT.send(ts_ASP_RSL_UD(rx_rsl.streamId, ts_RSL_CHAN_ACT_ACK(chan_nr, 23))); |
Harald Welte | 714ded9 | 2017-12-08 14:00:22 +0100 | [diff] [blame] | 462 | } |
| 463 | |
Harald Welte | 70b52c9 | 2018-02-12 20:47:31 +0100 | [diff] [blame] | 464 | [not dchan_suspended] IPA_PT.receive(tr_RSL(tr_RSL_MsgTypeDR(?))) -> value rx_rsl { |
Harald Welte | 714ded9 | 2017-12-08 14:00:22 +0100 | [diff] [blame] | 465 | /* dispatch to channel based on ChanId */ |
| 466 | cid := f_cid_by_chan_nr(f_trx_by_streamId(rx_rsl.streamId), |
| 467 | rx_rsl.rsl.ies[0].body.chan_nr); |
| 468 | if (cid != -1) { |
| 469 | CLIENT_PT.send(rx_rsl.rsl) to ConnectionTable[cid].comp_ref; |
| 470 | } else { |
| 471 | setverdict(fail, "RSL for unknown Dchan"); |
Daniel Willmann | e4ff537 | 2018-07-05 17:35:03 +0200 | [diff] [blame] | 472 | mtc.stop; |
Harald Welte | 714ded9 | 2017-12-08 14:00:22 +0100 | [diff] [blame] | 473 | } |
| 474 | } |
| 475 | |
Harald Welte | 70b52c9 | 2018-02-12 20:47:31 +0100 | [diff] [blame] | 476 | [not dchan_suspended] IPA_PT.receive { |
Harald Welte | 714ded9 | 2017-12-08 14:00:22 +0100 | [diff] [blame] | 477 | setverdict(fail, "Received unknown primitive from IPA"); |
Daniel Willmann | e4ff537 | 2018-07-05 17:35:03 +0200 | [diff] [blame] | 478 | mtc.stop; |
Harald Welte | 714ded9 | 2017-12-08 14:00:22 +0100 | [diff] [blame] | 479 | } |
| 480 | |
Harald Welte | 1c02fd1 | 2018-02-19 19:20:47 +0100 | [diff] [blame] | 481 | [bts_role] CLIENT_PT.receive(RSLDC_ChanRqd:?) -> value chan_rqd sender vc_conn { |
Harald Welte | 714ded9 | 2017-12-08 14:00:22 +0100 | [diff] [blame] | 482 | /* Store the knowledge that this sender has requested a certain RQ+time */ |
| 483 | f_cid_create(chan_rqd.ra, chan_rqd.fn, vc_conn); |
Harald Welte | 7ae019e | 2017-12-09 00:54:15 +0100 | [diff] [blame] | 484 | IPA_PT.send(ts_ASP_RSL_UD(IPAC_PROTO_RSL_TRX0, |
Harald Welte | 714ded9 | 2017-12-08 14:00:22 +0100 | [diff] [blame] | 485 | ts_RSL_CHAN_RQD(chan_rqd.ra, chan_rqd.fn))); |
| 486 | } |
| 487 | |
Pau Espin Pedrol | 6451b04 | 2018-10-24 20:36:16 +0200 | [diff] [blame] | 488 | [not bts_role] CLIENT_PT.receive(RSLDC_ChanRqd:?) -> value chan_rqd sender vc_conn { |
| 489 | /* Store the knowledge that this sender has requested a certain RQ+time */ |
| 490 | f_cid_create(chan_rqd.ra, chan_rqd.fn, vc_conn); |
| 491 | } |
| 492 | |
Harald Welte | 714ded9 | 2017-12-08 14:00:22 +0100 | [diff] [blame] | 493 | [] CLIENT_PT.receive(tr_RSL_MsgType(?)) -> value rx_rsl_msg sender vc_conn { |
| 494 | /* forward to BSC */ |
| 495 | cid := f_cid_by_comp_ref(vc_conn); |
Harald Welte | 7ae019e | 2017-12-09 00:54:15 +0100 | [diff] [blame] | 496 | IPA_PT.send(ts_ASP_RSL_UD(ConnectionTable[cid].stream_id, rx_rsl_msg)); |
Harald Welte | 714ded9 | 2017-12-08 14:00:22 +0100 | [diff] [blame] | 497 | } |
| 498 | |
Harald Welte | 34252c5 | 2018-02-24 04:51:50 +0100 | [diff] [blame] | 499 | [] CCHAN_PT.receive(tr_RSL(?)) -> value rx_rsl { |
| 500 | IPA_PT.send(ts_ASP_RSL_UD(rx_rsl.streamId, rx_rsl.rsl)); |
| 501 | } |
| 502 | |
Harald Welte | f70df65 | 2018-01-29 22:00:23 +0100 | [diff] [blame] | 503 | /* explicit registration, e.g. in (non-immediate) assignment case */ |
| 504 | [] RSL_PROC.getcall(RSLEM_register:{?,?,?}) -> param(trx_nr, chan_nr, vc_conn) { |
| 505 | f_cid_create_cnr(trx_nr, chan_nr, vc_conn); |
Harald Welte | e32ad99 | 2018-05-31 22:17:46 +0200 | [diff] [blame] | 506 | RSL_PROC.reply(RSLEM_register:{trx_nr, chan_nr, vc_conn}) to vc_conn; |
Harald Welte | f70df65 | 2018-01-29 22:00:23 +0100 | [diff] [blame] | 507 | } |
| 508 | |
Harald Welte | 1909f46 | 2018-01-29 22:29:29 +0100 | [diff] [blame] | 509 | [] RSL_PROC.getcall(RSLEM_unregister:{?,?,?}) -> param(trx_nr, chan_nr, vc_conn) { |
| 510 | cid := f_cid_by_chan_nr(trx_nr, chan_nr); |
| 511 | f_cid_clear(cid); |
Harald Welte | e32ad99 | 2018-05-31 22:17:46 +0200 | [diff] [blame] | 512 | RSL_PROC.reply(RSLEM_unregister:{trx_nr, chan_nr, vc_conn}) to vc_conn; |
Harald Welte | 1909f46 | 2018-01-29 22:29:29 +0100 | [diff] [blame] | 513 | } |
| 514 | |
Harald Welte | e32ad99 | 2018-05-31 22:17:46 +0200 | [diff] [blame] | 515 | [] RSL_PROC.getcall(RSLEM_suspend:{true}) -> sender vc_conn { |
Harald Welte | 70b52c9 | 2018-02-12 20:47:31 +0100 | [diff] [blame] | 516 | log("Suspending DChan"); |
| 517 | dchan_suspended := true; |
Harald Welte | e32ad99 | 2018-05-31 22:17:46 +0200 | [diff] [blame] | 518 | RSL_PROC.reply(RSLEM_suspend:{true}) to vc_conn; |
Harald Welte | 70b52c9 | 2018-02-12 20:47:31 +0100 | [diff] [blame] | 519 | } |
| 520 | |
Harald Welte | e32ad99 | 2018-05-31 22:17:46 +0200 | [diff] [blame] | 521 | [] RSL_PROC.getcall(RSLEM_suspend:{false}) -> sender vc_conn { |
Harald Welte | 70b52c9 | 2018-02-12 20:47:31 +0100 | [diff] [blame] | 522 | log("Resuming DChan"); |
| 523 | dchan_suspended := false; |
Harald Welte | e32ad99 | 2018-05-31 22:17:46 +0200 | [diff] [blame] | 524 | RSL_PROC.reply(RSLEM_suspend:{false}) to vc_conn; |
Harald Welte | 70b52c9 | 2018-02-12 20:47:31 +0100 | [diff] [blame] | 525 | } |
Harald Welte | 1909f46 | 2018-01-29 22:29:29 +0100 | [diff] [blame] | 526 | |
Harald Welte | e32ad99 | 2018-05-31 22:17:46 +0200 | [diff] [blame] | 527 | [] RSL_PROC.getcall(RSLEM_get_last_act:{?,?,?}) -> param(trx_nr, chan_nr) sender vc_conn { |
Harald Welte | ad2647b | 2018-03-22 19:53:55 +0100 | [diff] [blame] | 528 | var RSL_Message last_chan_act := f_lookup_last_act(trx_nr, chan_nr); |
Harald Welte | e32ad99 | 2018-05-31 22:17:46 +0200 | [diff] [blame] | 529 | RSL_PROC.reply(RSLEM_get_last_act:{trx_nr, chan_nr, last_chan_act}) to vc_conn; |
Harald Welte | ad2647b | 2018-03-22 19:53:55 +0100 | [diff] [blame] | 530 | } |
Harald Welte | 714ded9 | 2017-12-08 14:00:22 +0100 | [diff] [blame] | 531 | } |
| 532 | } |
| 533 | } |
| 534 | |
Daniel Willmann | 17f970f | 2018-01-17 12:03:19 +0100 | [diff] [blame] | 535 | private function f_conn_table_init() |
| 536 | runs on RSL_Emulation_CT { |
| 537 | var integer i; |
| 538 | |
| 539 | /* Initialize the ConnectionTable */ |
| 540 | for (i := 0; i < sizeof(ConnectionTable); i := i+1) { |
| 541 | f_cid_clear(i); |
| 542 | } |
| 543 | } |
Harald Welte | 714ded9 | 2017-12-08 14:00:22 +0100 | [diff] [blame] | 544 | |
Harald Welte | f70df65 | 2018-01-29 22:00:23 +0100 | [diff] [blame] | 545 | /* client/conn_hdlr side function to use procedure port to register stream_id/chan_nr */ |
Harald Welte | 421e4d4 | 2018-02-12 20:04:50 +0100 | [diff] [blame] | 546 | function f_rslem_register(uint8_t trx_nr, RslChannelNr chan_nr, RSLEM_PROC_PT PT := RSL_PROC) |
| 547 | runs on RSL_DchanHdlr { |
| 548 | PT.call(RSLEM_register:{trx_nr, chan_nr, self}) { |
| 549 | [] PT.getreply(RSLEM_register:{?,?,?}) {}; |
Harald Welte | f70df65 | 2018-01-29 22:00:23 +0100 | [diff] [blame] | 550 | } |
| 551 | } |
| 552 | |
Harald Welte | 1909f46 | 2018-01-29 22:29:29 +0100 | [diff] [blame] | 553 | /* client/conn_hdlr side function to use procedure port to unregister stream_id/chan_nr */ |
Harald Welte | 421e4d4 | 2018-02-12 20:04:50 +0100 | [diff] [blame] | 554 | function f_rslem_unregister(uint8_t trx_nr, RslChannelNr chan_nr, RSLEM_PROC_PT PT := RSL_PROC) |
| 555 | runs on RSL_DchanHdlr { |
| 556 | PT.call(RSLEM_unregister:{trx_nr, chan_nr, self}) { |
| 557 | [] PT.getreply(RSLEM_unregister:{?,?,?}) {}; |
Harald Welte | 1909f46 | 2018-01-29 22:29:29 +0100 | [diff] [blame] | 558 | } |
| 559 | } |
| 560 | |
Harald Welte | 70b52c9 | 2018-02-12 20:47:31 +0100 | [diff] [blame] | 561 | /* resume handling of RSL DChan messages from IPA until f_rslem_resume() is called */ |
| 562 | function f_rslem_suspend(RSLEM_PROC_PT PT) |
| 563 | runs on RSL_DchanHdlr { |
| 564 | PT.call(RSLEM_suspend:{true}) { |
| 565 | [] PT.getreply(RSLEM_suspend:{true}) {}; |
| 566 | } |
| 567 | } |
| 568 | |
| 569 | /* resume handling of RSL DChan messages after f_rslem_suspend() is called */ |
| 570 | function f_rslem_resume(RSLEM_PROC_PT PT) |
| 571 | runs on RSL_DchanHdlr { |
| 572 | PT.call(RSLEM_suspend:{false}) { |
| 573 | [] PT.getreply(RSLEM_suspend:{false}) {}; |
| 574 | } |
| 575 | } |
| 576 | |
Harald Welte | ad2647b | 2018-03-22 19:53:55 +0100 | [diff] [blame] | 577 | /* obtain the last RSL_CHAN_ACT message for the given chan_nr */ |
| 578 | function f_rslem_get_last_act(RSLEM_PROC_PT PT, uint8_t trx_nr, RslChannelNr chan_nr) |
| 579 | runs on RSL_DchanHdlr return RSL_Message { |
| 580 | var RSL_Message chan_act; |
| 581 | PT.call(RSLEM_get_last_act:{trx_nr, chan_nr, -}) { |
| 582 | [] PT.getreply(RSLEM_get_last_act:{trx_nr, chan_nr, ?}) -> param(chan_act) {}; |
| 583 | } |
| 584 | return chan_act; |
| 585 | } |
| 586 | |
| 587 | |
Harald Welte | 70b52c9 | 2018-02-12 20:47:31 +0100 | [diff] [blame] | 588 | |
Harald Welte | 1909f46 | 2018-01-29 22:29:29 +0100 | [diff] [blame] | 589 | |
Harald Welte | 714ded9 | 2017-12-08 14:00:22 +0100 | [diff] [blame] | 590 | } |