Harald Welte | 34b5a95 | 2019-05-27 11:54:11 +0200 | [diff] [blame] | 1 | /* GPRS-NS Emulation in TTCN-3 |
Harald Welte | be7afce | 2021-01-17 22:04:36 +0100 | [diff] [blame^] | 2 | * (C) 2018-2021 Harald Welte <laforge@gnumonks.org> |
Harald Welte | 34b5a95 | 2019-05-27 11:54:11 +0200 | [diff] [blame] | 3 | * contributions by sysmocom - s.f.m.c. GmbH |
| 4 | * All rights reserved. |
| 5 | * |
| 6 | * Released under the terms of GNU General Public License, Version 2 or |
| 7 | * (at your option) any later version. |
| 8 | * |
| 9 | * SPDX-License-Identifier: GPL-2.0-or-later |
| 10 | */ |
| 11 | |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 12 | module NS_Emulation { |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 13 | import from Misc_Helpers all; |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 14 | import from NS_Types all; |
| 15 | import from BSSGP_Types all; |
Harald Welte | 867243a | 2020-09-13 18:32:32 +0200 | [diff] [blame] | 16 | import from Osmocom_Types all; |
Harald Welte | e0abc47 | 2018-02-05 09:13:31 +0100 | [diff] [blame] | 17 | import from Osmocom_Gb_Types all; |
Harald Welte | 013d65a | 2020-09-13 14:41:31 +0200 | [diff] [blame] | 18 | import from NS_Provider_IPL4 all; |
Harald Welte | 867243a | 2020-09-13 18:32:32 +0200 | [diff] [blame] | 19 | #ifdef NS_EMULATION_FR |
| 20 | import from NS_Provider_FR all; |
| 21 | #endif |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 22 | import from IPL4asp_Types all; |
| 23 | |
| 24 | type record NsUnitdataRequest { |
| 25 | BssgpBvci bvci, |
| 26 | Nsei nsei, |
Harald Welte | c450552 | 2020-11-11 18:55:09 +0100 | [diff] [blame] | 27 | integer lsp, |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 28 | octetstring sdu optional, |
Harald Welte | e0abc47 | 2018-02-05 09:13:31 +0100 | [diff] [blame] | 29 | PDU_BSSGP bssgp optional |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 30 | } |
| 31 | |
Harald Welte | c450552 | 2020-11-11 18:55:09 +0100 | [diff] [blame] | 32 | template NsUnitdataRequest tr_NsUdReq(template Nsei nsei, template BssgpBvci bvci, template integer lsp, |
| 33 | template octetstring sdu, template PDU_BSSGP bssgp) := { |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 34 | bvci := bvci, |
| 35 | nsei := nsei, |
Harald Welte | c450552 | 2020-11-11 18:55:09 +0100 | [diff] [blame] | 36 | lsp := lsp, |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 37 | sdu := sdu, |
| 38 | bssgp := bssgp |
| 39 | } |
| 40 | |
| 41 | template (value) NsUnitdataRequest ts_NsUdReq(template (value) Nsei nsei, |
| 42 | template (value) BssgpBvci bvci, |
Harald Welte | c450552 | 2020-11-11 18:55:09 +0100 | [diff] [blame] | 43 | template (value) integer lsp, |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 44 | template (omit) octetstring sdu, |
| 45 | template (omit) PDU_BSSGP bssgp) := { |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 46 | bvci := bvci, |
| 47 | nsei := nsei, |
Harald Welte | c450552 | 2020-11-11 18:55:09 +0100 | [diff] [blame] | 48 | lsp := lsp, |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 49 | sdu := sdu, |
| 50 | bssgp := bssgp |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 51 | } |
| 52 | |
| 53 | type record NsUnitdataIndication { |
| 54 | BssgpBvci bvci, |
| 55 | Nsei nsei, |
Harald Welte | 80a249a | 2020-11-17 19:57:40 +0100 | [diff] [blame] | 56 | Nsvci nsvci, |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 57 | octetstring sdu optional, |
Harald Welte | e0abc47 | 2018-02-05 09:13:31 +0100 | [diff] [blame] | 58 | PDU_BSSGP bssgp optional |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 59 | } |
| 60 | |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 61 | template (present) NsUnitdataIndication tr_NsUdInd(template (present) Nsei nsei, |
| 62 | template (present) BssgpBvci bvci, |
| 63 | template octetstring sdu) := { |
| 64 | bvci := bvci, |
| 65 | nsei := nsei, |
Harald Welte | 80a249a | 2020-11-17 19:57:40 +0100 | [diff] [blame] | 66 | nsvci := ?, |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 67 | sdu := sdu, |
| 68 | bssgp := ? |
| 69 | } |
| 70 | |
Harald Welte | 80a249a | 2020-11-17 19:57:40 +0100 | [diff] [blame] | 71 | template (value) NsUnitdataIndication ts_NsUdInd(Nsei nsei, Nsvci nsvci, BssgpBvci bvci, octetstring sdu) := { |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 72 | bvci := bvci, |
| 73 | nsei := nsei, |
Harald Welte | 80a249a | 2020-11-17 19:57:40 +0100 | [diff] [blame] | 74 | nsvci := nsvci, |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 75 | sdu := sdu, |
Harald Welte | e0abc47 | 2018-02-05 09:13:31 +0100 | [diff] [blame] | 76 | bssgp := dec_PDU_BSSGP(sdu) |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 77 | } |
| 78 | |
| 79 | type record NsStatusIndication { |
| 80 | Nsei nsei, |
| 81 | Nsvci nsvci, |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 82 | NsvcState old_state, |
Harald Welte | dc0a090 | 2020-11-10 21:03:29 +0100 | [diff] [blame] | 83 | NsvcState new_state, |
| 84 | boolean first_or_last |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 85 | } |
| 86 | |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 87 | template (present) NsStatusIndication tr_NsStsInd(template (present) Nsei nsei := ?, |
| 88 | template (present) Nsvci nsvci := ?, |
| 89 | template (present) NsvcState old_state := ?, |
Harald Welte | dc0a090 | 2020-11-10 21:03:29 +0100 | [diff] [blame] | 90 | template (present) NsvcState state := ?, |
| 91 | template (present) boolean first_or_last := ?) := { |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 92 | nsei := nsei, |
| 93 | nsvci := nsvci, |
| 94 | old_state := old_state, |
Harald Welte | dc0a090 | 2020-11-10 21:03:29 +0100 | [diff] [blame] | 95 | new_state := state, |
| 96 | first_or_last := first_or_last |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 97 | } |
| 98 | |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 99 | |
Harald Welte | dc0a090 | 2020-11-10 21:03:29 +0100 | [diff] [blame] | 100 | template (value) NsStatusIndication ts_NsStsInd(Nsei nsei, Nsvci nsvci, NsvcState old_state, NsvcState state, |
| 101 | boolean first_or_last := false) := { |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 102 | nsei := nsei, |
| 103 | nsvci := nsvci, |
| 104 | old_state := old_state, |
Harald Welte | dc0a090 | 2020-11-10 21:03:29 +0100 | [diff] [blame] | 105 | new_state := state, |
| 106 | first_or_last := first_or_last |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 107 | } |
| 108 | |
| 109 | type enumerated NsvcState { |
| 110 | NSVC_S_DEAD_BLOCKED, |
| 111 | NSVC_S_WAIT_RESET, |
| 112 | NSVC_S_ALIVE_BLOCKED, |
| 113 | NSVC_S_ALIVE_UNBLOCKED |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 114 | } |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 115 | |
| 116 | /* port from our (internal) point of view */ |
| 117 | type port NS_SP_PT message { |
| 118 | in NsUnitdataRequest; |
| 119 | out NsUnitdataIndication, |
Harald Welte | 013d65a | 2020-09-13 14:41:31 +0200 | [diff] [blame] | 120 | NsStatusIndication; |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 121 | } with { extension "internal" }; |
| 122 | |
| 123 | /* port from the user point of view */ |
| 124 | type port NS_PT message { |
| 125 | in ASP_Event, |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 126 | NsStatusIndication, |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 127 | NsUnitdataIndication; |
| 128 | out NsUnitdataRequest; |
| 129 | } with { extension "internal" }; |
| 130 | |
Harald Welte | 013d65a | 2020-09-13 14:41:31 +0200 | [diff] [blame] | 131 | type component NS_Provider_CT { |
| 132 | /* upper port, facing to NS_Emulation:NSCP */ |
| 133 | port NS_PROVIDER_PT NSE; |
| 134 | /* lower layer ports (UDP/IP, Frame Relay) are added in derived components */ |
| 135 | }; |
| 136 | |
Harald Welte | bd612cd | 2020-09-14 09:42:28 +0200 | [diff] [blame] | 137 | type enumerated NS_Provider_LinkStatus { |
| 138 | NS_PROV_LINK_STATUS_UP, |
| 139 | NS_PROV_LINK_STATUS_DOWN |
| 140 | }; |
| 141 | type union NS_Provider_Evt { |
| 142 | NS_Provider_LinkStatus link_status |
| 143 | }; |
| 144 | |
Harald Welte | 013d65a | 2020-09-13 14:41:31 +0200 | [diff] [blame] | 145 | /* port between NS_Provider and NS_CT */ |
| 146 | type port NS_PROVIDER_PT message { |
Harald Welte | bd612cd | 2020-09-14 09:42:28 +0200 | [diff] [blame] | 147 | inout PDU_NS, NS_Provider_Evt; |
Harald Welte | 013d65a | 2020-09-13 14:41:31 +0200 | [diff] [blame] | 148 | } with { extension "internal" }; |
| 149 | |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 150 | type record NSVCConfigurationIP { |
| 151 | AddressFamily address_family, |
| 152 | PortNumber local_udp_port, |
| 153 | charstring local_ip, |
| 154 | PortNumber remote_udp_port, |
Harald Welte | be7afce | 2021-01-17 22:04:36 +0100 | [diff] [blame^] | 155 | charstring remote_ip, |
| 156 | uint8_t data_weight, |
| 157 | uint8_t signalling_weight |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 158 | }; |
| 159 | type record NSVCConfigurationFR { |
| 160 | charstring netdev, /* HDLC net-device for AF_PACKET socket */ |
| 161 | integer dlci |
| 162 | }; |
| 163 | type union NSVCConfigurationP { |
| 164 | NSVCConfigurationIP ip, |
| 165 | NSVCConfigurationFR fr |
| 166 | }; |
| 167 | type record NSVCConfiguration { |
| 168 | NSVCConfigurationP provider, |
| 169 | Nsvci nsvci |
| 170 | }; |
| 171 | type record of NSVCConfiguration NSVCConfigurations; |
| 172 | type record NSConfiguration { |
| 173 | Nsvci nsei, |
| 174 | boolean role_sgsn, |
| 175 | boolean handle_sns, |
| 176 | NSVCConfigurations nsvc |
| 177 | } |
| 178 | |
| 179 | /*********************************************************************** |
| 180 | * per NS-VCG component. Exists once per [peer of] NSE |
| 181 | ***********************************************************************/ |
| 182 | |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 183 | type component NS_CT { |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 184 | /* NS-User SAP towards the user */ |
| 185 | port NS_SP_PT NS_SP; |
| 186 | |
| 187 | /* port towards the per-NSVC components */ |
Harald Welte | 1308dbb | 2021-01-18 18:19:38 +0100 | [diff] [blame] | 188 | port NSint_PT NSVC; |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 189 | |
| 190 | /* all of the NS configuration a user passes to us */ |
| 191 | var NSConfiguration g_config; |
| 192 | var charstring g_id; |
| 193 | |
| 194 | /* references to the per-NSVC components */ |
| 195 | var NsvcTable g_nsvcs := {}; |
Harald Welte | c450552 | 2020-11-11 18:55:09 +0100 | [diff] [blame] | 196 | /* list of indexes to g_nsvcs[] of currently unblocked NSVCs */ |
Harald Welte | be7afce | 2021-01-17 22:04:36 +0100 | [diff] [blame^] | 197 | var ro_integer g_unblocked_nsvcs_sig := {}; |
| 198 | var ro_integer g_unblocked_nsvcs_data := {}; |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 199 | }; |
| 200 | type record NsvcTableEntry { |
Harald Welte | be7afce | 2021-01-17 22:04:36 +0100 | [diff] [blame^] | 201 | NSVCConfiguration cfg, |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 202 | NSVC_CT vc_conn, |
| 203 | NsvcState state |
| 204 | }; |
| 205 | type record of NsvcTableEntry NsvcTable; |
Harald Welte | c450552 | 2020-11-11 18:55:09 +0100 | [diff] [blame] | 206 | type record of integer ro_integer; |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 207 | |
Harald Welte | 1308dbb | 2021-01-18 18:19:38 +0100 | [diff] [blame] | 208 | /* internal port from the NS-VC point of view */ |
| 209 | type port NSint_SP_PT message { |
| 210 | in NsUnitdataRequest, |
| 211 | SnsRequest, |
| 212 | NsCtrlRequest; |
| 213 | out NsUnitdataIndication, |
| 214 | SnsIndication, |
| 215 | NsStatusIndication; |
| 216 | } with { extension "internal" }; |
| 217 | |
| 218 | /* internal port from the NS-VCG point of view */ |
| 219 | type port NSint_PT message { |
| 220 | in ASP_Event, |
| 221 | NsStatusIndication, |
| 222 | SnsIndication, |
| 223 | NsUnitdataIndication; |
| 224 | out NsUnitdataRequest, |
| 225 | SnsRequest, |
| 226 | NsCtrlRequest; |
| 227 | } with { extension "internal" }; |
| 228 | |
| 229 | /* Used by NS-VC to report reception of a SNS PDU to NS-VCG */ |
| 230 | type record SnsIndication { |
| 231 | Nsvci nsvci, |
| 232 | PDU_NS ns |
| 233 | }; |
| 234 | |
| 235 | /* Used by NS-VCG to request transmission of a SNS PDU via a NS-VC */ |
| 236 | type record SnsRequest { |
| 237 | Nsvci nsvci, |
| 238 | PDU_NS ns |
| 239 | }; |
| 240 | |
| 241 | type enumerated NsCtrlRequest { |
| 242 | StartAliveProcedure (0) |
| 243 | }; |
| 244 | |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 245 | /* add one NSVC (component and table entry */ |
| 246 | function f_nsvc_add(NSVCConfiguration nsvc_cfg) runs on NS_CT { |
| 247 | var charstring nsvc_id := g_id & "-NSVCI" & int2str(nsvc_cfg.nsvci); |
| 248 | var NsvcTableEntry te; |
| 249 | |
Harald Welte | be7afce | 2021-01-17 22:04:36 +0100 | [diff] [blame^] | 250 | te.cfg := nsvc_cfg; |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 251 | te.vc_conn := NSVC_CT.create(nsvc_id); |
| 252 | te.state := NSVC_S_DEAD_BLOCKED; |
| 253 | |
| 254 | connect(self:NSVC, te.vc_conn:NS_SP); |
| 255 | te.vc_conn.start(NSVCStart(nsvc_cfg, g_config, nsvc_id)); |
| 256 | |
| 257 | g_nsvcs := g_nsvcs & { te }; |
Harald Welte | c450552 | 2020-11-11 18:55:09 +0100 | [diff] [blame] | 258 | /* no need to add to g_unblocked_nsvcs, as state is always DEAD_BLOCKED above */ |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 259 | } |
| 260 | |
| 261 | function f_nsvc_find_idx(Nsvci nsvci) runs on NS_CT return integer { |
| 262 | var integer i; |
| 263 | for (i := 0; i < lengthof(g_nsvcs); i := i+1) { |
Harald Welte | be7afce | 2021-01-17 22:04:36 +0100 | [diff] [blame^] | 264 | if (g_nsvcs[i].cfg.nsvci == nsvci) { |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 265 | return i; |
| 266 | } |
| 267 | } |
| 268 | return -1; |
| 269 | } |
| 270 | |
| 271 | function f_nsvc_find(Nsvci nsvci) runs on NS_CT return NSVC_CT { |
| 272 | var integer i := f_nsvc_find_idx(nsvci); |
| 273 | if (i < 0) { |
| 274 | return null; |
| 275 | } else { |
| 276 | return g_nsvcs[i].vc_conn; |
| 277 | } |
| 278 | } |
| 279 | |
| 280 | function f_nsvc_update_state(Nsvci nsvci, NsvcState state) runs on NS_CT { |
| 281 | var integer i := f_nsvc_find_idx(nsvci); |
| 282 | if (i < 0) { |
| 283 | return; |
| 284 | } |
Harald Welte | c450552 | 2020-11-11 18:55:09 +0100 | [diff] [blame] | 285 | if (g_nsvcs[i].state != NSVC_S_ALIVE_UNBLOCKED and state == NSVC_S_ALIVE_UNBLOCKED) { |
| 286 | /* add index to list of unblocked NSVCs */ |
Harald Welte | be7afce | 2021-01-17 22:04:36 +0100 | [diff] [blame^] | 287 | if (not ischosen(g_nsvcs[i].cfg.provider.ip) or |
| 288 | g_nsvcs[i].cfg.provider.ip.signalling_weight > 0) { |
| 289 | g_unblocked_nsvcs_sig := g_unblocked_nsvcs_sig & {i}; |
| 290 | } |
| 291 | if (not ischosen(g_nsvcs[i].cfg.provider.ip) or |
| 292 | g_nsvcs[i].cfg.provider.ip.data_weight > 0) { |
| 293 | g_unblocked_nsvcs_data := g_unblocked_nsvcs_data & {i}; |
| 294 | } |
Harald Welte | c450552 | 2020-11-11 18:55:09 +0100 | [diff] [blame] | 295 | } else if (g_nsvcs[i].state == NSVC_S_ALIVE_UNBLOCKED and state != NSVC_S_ALIVE_UNBLOCKED) { |
| 296 | /* remove index to list of unblocked NSVCs */ |
Harald Welte | be7afce | 2021-01-17 22:04:36 +0100 | [diff] [blame^] | 297 | var ro_integer new_unblocked_nsvcs_sig := {}; |
| 298 | for (var integer j := 0; j < lengthof(g_unblocked_nsvcs_sig); j := j+1) { |
| 299 | if (g_unblocked_nsvcs_sig[j] != i) { |
| 300 | new_unblocked_nsvcs_sig := new_unblocked_nsvcs_sig & {j}; |
Harald Welte | c450552 | 2020-11-11 18:55:09 +0100 | [diff] [blame] | 301 | } |
| 302 | } |
Harald Welte | be7afce | 2021-01-17 22:04:36 +0100 | [diff] [blame^] | 303 | g_unblocked_nsvcs_sig := new_unblocked_nsvcs_sig; |
| 304 | |
| 305 | var ro_integer new_unblocked_nsvcs_data := {}; |
| 306 | for (var integer j := 0; j < lengthof(g_unblocked_nsvcs_data); j := j+1) { |
| 307 | if (g_unblocked_nsvcs_data[j] != i) { |
| 308 | new_unblocked_nsvcs_data := new_unblocked_nsvcs_data & {j}; |
| 309 | } |
| 310 | } |
| 311 | g_unblocked_nsvcs_data := new_unblocked_nsvcs_data; |
| 312 | |
Harald Welte | c450552 | 2020-11-11 18:55:09 +0100 | [diff] [blame] | 313 | } |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 314 | g_nsvcs[i].state := state; |
| 315 | } |
| 316 | |
| 317 | function NSStart(NSConfiguration init_config, charstring id := testcasename()) runs on NS_CT { |
| 318 | g_config := init_config; |
| 319 | g_id := id; |
| 320 | |
| 321 | /* iterate over list of NS-VCs and start per-NSVC components */ |
| 322 | for (var integer i := 0; i < lengthof(g_config.nsvc); i := i+1) { |
| 323 | var NSVCConfiguration nsvc_cfg := g_config.nsvc[i]; |
| 324 | f_nsvc_add(nsvc_cfg); |
| 325 | } |
| 326 | |
| 327 | while (true) { |
| 328 | alt { |
| 329 | [] as_ns_common() {} |
| 330 | } |
| 331 | } |
| 332 | } |
| 333 | |
Harald Welte | dc0a090 | 2020-11-10 21:03:29 +0100 | [diff] [blame] | 334 | function f_count_nsvcs_in_state(template NsvcState state := ?) runs on NS_CT return integer { |
| 335 | var integer i; |
| 336 | var integer res := 0; |
| 337 | for (i := 0; i < lengthof(g_nsvcs); i := i+1) { |
| 338 | if (match(g_nsvcs[i].state, state)) { |
| 339 | res := res + 1; |
| 340 | } |
| 341 | } |
| 342 | return res; |
| 343 | } |
| 344 | |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 345 | private altstep as_ns_common() runs on NS_CT { |
| 346 | var NsStatusIndication rx_nssi; |
| 347 | var NsUnitdataIndication rx_nsudi; |
| 348 | var NsUnitdataRequest rx_nsudr; |
| 349 | /* pass from NS-VCs up to user */ |
Harald Welte | dc0a090 | 2020-11-10 21:03:29 +0100 | [diff] [blame] | 350 | [] NSVC.receive(tr_NsStsInd(g_config.nsei, ?, ?, NSVC_S_ALIVE_UNBLOCKED)) -> value rx_nssi { |
| 351 | /* check if this one is the first to be unblocked */ |
| 352 | var integer num_nsvc_unblocked := f_count_nsvcs_in_state(NSVC_S_ALIVE_UNBLOCKED); |
| 353 | f_nsvc_update_state(rx_nssi.nsvci, rx_nssi.new_state); |
| 354 | if (num_nsvc_unblocked == 0) { |
| 355 | rx_nssi.first_or_last := true; |
| 356 | } |
| 357 | NS_SP.send(rx_nssi); |
| 358 | } |
| 359 | [] NSVC.receive(tr_NsStsInd(g_config.nsei, ?, ?, NSVC_S_DEAD_BLOCKED)) -> value rx_nssi { |
| 360 | f_nsvc_update_state(rx_nssi.nsvci, rx_nssi.new_state); |
| 361 | /* check if this one is the last to be blocked */ |
| 362 | var integer num_nsvc_unblocked := f_count_nsvcs_in_state(NSVC_S_ALIVE_UNBLOCKED); |
| 363 | if (num_nsvc_unblocked == 0) { |
| 364 | rx_nssi.first_or_last := true; |
| 365 | } |
| 366 | NS_SP.send(rx_nssi); |
| 367 | } |
| 368 | [] NSVC.receive(tr_NsStsInd(g_config.nsei, ?, ?, ?)) -> value rx_nssi { |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 369 | f_nsvc_update_state(rx_nssi.nsvci, rx_nssi.new_state); |
| 370 | NS_SP.send(rx_nssi); |
| 371 | } |
| 372 | [] NSVC.receive(tr_NsStsInd) -> value rx_nssi { |
| 373 | Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, |
| 374 | log2str("Received NsStatusInd for invalid NSEI: ", rx_nssi)); |
| 375 | } |
| 376 | [] NSVC.receive(tr_NsUdInd(g_config.nsei, ?, ?)) -> value rx_nsudi { |
| 377 | NS_SP.send(rx_nsudi); |
| 378 | } |
Harald Welte | 1308dbb | 2021-01-18 18:19:38 +0100 | [diff] [blame] | 379 | |
| 380 | [g_config.handle_sns and g_config.role_sgsn] as_vcg_sns_sgsn(); |
| 381 | |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 382 | [] NSVC.receive(tr_NsUdInd(?, ?, ?)) -> value rx_nsudi { |
| 383 | Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, |
| 384 | log2str("Received UnitDataInd for invalid NSEI: ", rx_nsudi)); |
| 385 | } |
| 386 | /* from user down to NS-VC */ |
Harald Welte | be7afce | 2021-01-17 22:04:36 +0100 | [diff] [blame^] | 387 | [] NS_SP.receive(tr_NsUdReq(g_config.nsei, 0, ?, ?, *)) -> value rx_nsudr { |
Harald Welte | c450552 | 2020-11-11 18:55:09 +0100 | [diff] [blame] | 388 | /* load distribution function */ |
Harald Welte | be7afce | 2021-01-17 22:04:36 +0100 | [diff] [blame^] | 389 | var integer nsvc_idx := g_unblocked_nsvcs_sig[rx_nsudr.lsp mod lengthof(g_unblocked_nsvcs_sig)]; |
Harald Welte | c450552 | 2020-11-11 18:55:09 +0100 | [diff] [blame] | 390 | NSVC.send(rx_nsudr) to g_nsvcs[nsvc_idx].vc_conn; |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 391 | } |
Harald Welte | be7afce | 2021-01-17 22:04:36 +0100 | [diff] [blame^] | 392 | [] NS_SP.receive(tr_NsUdReq(g_config.nsei, ?, ?, ?, *)) -> value rx_nsudr { |
| 393 | /* load distribution function */ |
| 394 | var integer nsvc_idx := g_unblocked_nsvcs_data[rx_nsudr.lsp mod lengthof(g_unblocked_nsvcs_data)]; |
| 395 | NSVC.send(rx_nsudr) to g_nsvcs[nsvc_idx].vc_conn; |
| 396 | } |
| 397 | |
Harald Welte | c450552 | 2020-11-11 18:55:09 +0100 | [diff] [blame] | 398 | [] NS_SP.receive(tr_NsUdReq(?, ?, ?, ?, *)) -> value rx_nsudr { |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 399 | Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, |
| 400 | log2str("Received NsUnitdataReq for invalid NSEI: ", rx_nsudr)); |
| 401 | } |
| 402 | } |
| 403 | |
Harald Welte | 1308dbb | 2021-01-18 18:19:38 +0100 | [diff] [blame] | 404 | /* generate a list of v4 + v6 endpoints based on the NSVConfigurations. This is not strictly |
| 405 | * accurate, as we should create a list of _endpoints_, while we actually create a list of |
| 406 | * NSVCs. Those are only identical as long as our peer only implements one endpoint */ |
| 407 | private function gen_sns_ip_elems(out template (omit) IP4_Elements v4_out, |
| 408 | out template (omit) IP6_Elements v6_out) runs on NS_CT { |
| 409 | var integer i; |
| 410 | var IP4_Elements v4 := {}; |
| 411 | var IP6_Elements v6 := {}; |
| 412 | |
| 413 | for (i := 0; i < lengthof(g_config.nsvc); i := i + 1) { |
| 414 | var NSVCConfiguration nsvc_cfg := g_config.nsvc[i]; |
| 415 | if (not ischosen(nsvc_cfg.provider.ip)) { |
| 416 | continue; |
| 417 | } |
| 418 | if (nsvc_cfg.provider.ip.address_family == AF_INET) { |
| 419 | v4 := v4 & { valueof(ts_SNS_IPv4(nsvc_cfg.provider.ip.local_ip, |
Harald Welte | be7afce | 2021-01-17 22:04:36 +0100 | [diff] [blame^] | 420 | nsvc_cfg.provider.ip.local_udp_port, |
| 421 | nsvc_cfg.provider.ip.signalling_weight, |
| 422 | nsvc_cfg.provider.ip.data_weight)) }; |
Harald Welte | 1308dbb | 2021-01-18 18:19:38 +0100 | [diff] [blame] | 423 | } else if (nsvc_cfg.provider.ip.address_family == AF_INET6) { |
| 424 | v6 := v6 & { valueof(ts_SNS_IPv6(nsvc_cfg.provider.ip.local_ip, |
Harald Welte | be7afce | 2021-01-17 22:04:36 +0100 | [diff] [blame^] | 425 | nsvc_cfg.provider.ip.local_udp_port, |
| 426 | nsvc_cfg.provider.ip.signalling_weight, |
| 427 | nsvc_cfg.provider.ip.data_weight)) }; |
Harald Welte | 1308dbb | 2021-01-18 18:19:38 +0100 | [diff] [blame] | 428 | } |
| 429 | } |
| 430 | |
| 431 | /* we must not return empty lists, but 'omit' as otherwise we get wrong SNS IEs */ |
| 432 | if (lengthof(v4) == 0) { |
| 433 | v4_out := omit; |
| 434 | } else { |
| 435 | v4_out := v4; |
| 436 | } |
| 437 | if (lengthof(v6) == 0) { |
| 438 | v6_out := omit; |
| 439 | } else { |
| 440 | v6_out := v6; |
| 441 | } |
| 442 | } |
| 443 | |
| 444 | /* simple IP Sub-Network Service responder for the SGSN side. This is not a full implementation |
| 445 | * of the protocol, merely sufficient to make the PCU/BSS side happy to proceed */ |
| 446 | private altstep as_vcg_sns_sgsn() runs on NS_CT { |
| 447 | var SnsIndication sind; |
| 448 | var NSVC_CT vc; |
| 449 | [] NSVC.receive(SnsIndication:{?, tr_SNS_SIZE(g_config.nsei)}) -> value sind sender vc { |
| 450 | /* blindly acknowledge whatever the PCU sends */ |
| 451 | NSVC.send(SnsRequest:{sind.nsvci, ts_SNS_SIZE_ACK(g_config.nsei, omit)}) to vc; |
| 452 | } |
| 453 | /* FIXME: We assume our peer has only one endpoint */ |
| 454 | [] NSVC.receive(SnsIndication:{?, tr_SNS_CONFIG(g_config.nsei, true, |
| 455 | {tr_SNS_IPv4(g_config.nsvc[0].provider.ip.remote_ip, |
| 456 | g_config.nsvc[0].provider.ip.remote_udp_port)})}) |
| 457 | -> value sind sender vc { |
| 458 | /* blindly acknowledge whatever the PCU sends */ |
| 459 | NSVC.send(SnsRequest:{sind.nsvci, ts_SNS_CONFIG_ACK(g_config.nsei, omit)}) to vc; |
| 460 | /* send a SNS-CONFIG in response and expect a SNS-CONFIG-ACK */ |
| 461 | var template (omit) IP4_Elements v4; |
| 462 | var template (omit) IP6_Elements v6; |
| 463 | gen_sns_ip_elems(v4, v6); |
| 464 | NSVC.send(SnsRequest:{sind.nsvci, |
| 465 | ts_SNS_CONFIG(g_config.nsei, true, v4, v6)}) to vc; |
| 466 | alt { |
| 467 | [] NSVC.receive(SnsIndication:{sind.nsvci, |
| 468 | tr_SNS_CONFIG_ACK(g_config.nsei, omit)}) from vc { |
| 469 | /* success */ |
| 470 | log("SNS Config succeeded. Sending Alive"); |
| 471 | /* inform all NS-VC that they are now considered alive */ |
| 472 | for (var integer i := 0; i < lengthof(g_nsvcs); i := i+1) { |
| 473 | NSVC.send(NsCtrlRequest:StartAliveProcedure) to g_nsvcs[i].vc_conn; |
| 474 | } |
| 475 | } |
| 476 | [] NSVC.receive(SnsIndication:{sind.nsvci, |
| 477 | tr_SNS_CONFIG_ACK(g_config.nsei, ?)}) from vc { |
| 478 | setverdict(fail, "Unexpected SNS-CONFIG-NACK"); |
| 479 | self.stop; |
| 480 | } |
| 481 | } |
| 482 | } |
| 483 | [] NSVC.receive(SnsIndication:{?, tr_SNS_CONFIG(g_config.nsei, false, ?)}) { /* ignore */} |
| 484 | [] NSVC.receive(SnsIndication:{?, tr_SNS_CONFIG(g_config.nsei, true, ?)}) { |
| 485 | setverdict(fail, "Unexpected SNS-CONFIG content"); |
| 486 | self.stop; |
| 487 | } |
| 488 | [] NSVC.receive(SnsIndication:{?, tr_SNS_CONFIG(?, ?, ?)}) { |
| 489 | setverdict(fail, "SNS-CONFIG from unexpected NSEI"); |
| 490 | self.stop; |
| 491 | } |
| 492 | } |
| 493 | |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 494 | /*********************************************************************** |
| 495 | per-NSVC component. Exists once for each NS-VC in the NS-VCG |
| 496 | ***********************************************************************/ |
| 497 | |
| 498 | type component NSVC_CT { |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 499 | /* UDP port towards the bottom (IUT) */ |
Harald Welte | 013d65a | 2020-09-13 14:41:31 +0200 | [diff] [blame] | 500 | port NS_PROVIDER_PT NSCP; |
| 501 | var NS_Provider_IPL4_CT vc_NSP_IP; |
Harald Welte | 867243a | 2020-09-13 18:32:32 +0200 | [diff] [blame] | 502 | #ifdef NS_EMULATION_FR |
| 503 | var NS_Provider_FR_CT vc_NSP_FR; |
| 504 | #endif |
Harald Welte | 013d65a | 2020-09-13 14:41:31 +0200 | [diff] [blame] | 505 | |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 506 | /* port towards the NS_CT */ |
Harald Welte | 1308dbb | 2021-01-18 18:19:38 +0100 | [diff] [blame] | 507 | port NSint_SP_PT NS_SP; |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 508 | |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 509 | /* configuration passed by the user */ |
| 510 | var NSVCConfiguration g_nsvc_config; |
| 511 | /* we cannot access the NS_CT.config and hence need to copy those */ |
| 512 | var NSConfiguration g_config; |
Alexander Couzens | 2c12b24 | 2018-07-31 00:30:11 +0200 | [diff] [blame] | 513 | |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 514 | var NsvcState vc_state := NSVC_S_DEAD_BLOCKED; |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 515 | |
| 516 | timer Tns_alive := 3.0; |
| 517 | timer Tns_test := 10.0; |
| 518 | timer Tns_block := 10.0; |
Harald Welte | 3dd8355 | 2020-09-14 11:38:01 +0200 | [diff] [blame] | 519 | timer Tns_reset := 10.0; |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 520 | } |
| 521 | |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 522 | function NSVCStart(NSVCConfiguration init_config, NSConfiguration init_g_config, charstring id := testcasename()) runs on NSVC_CT { |
| 523 | g_nsvc_config := init_config; |
| 524 | g_config := init_g_config; |
| 525 | f_init(id & "-NSVCemu" & int2str(g_nsvc_config.nsvci)); |
| 526 | f_ScanEvents(); |
Alexander Couzens | 2c12b24 | 2018-07-31 00:30:11 +0200 | [diff] [blame] | 527 | } |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 528 | |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 529 | private function f_init(charstring id) runs on NSVC_CT { |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 530 | if (ischosen(g_nsvc_config.provider.ip)) { |
| 531 | /* Connect the UDP socket */ |
| 532 | vc_NSP_IP := NS_Provider_IPL4_CT.create(id & "-provIP"); |
| 533 | connect(self:NSCP, vc_NSP_IP:NSE); |
| 534 | vc_NSP_IP.start(NS_Provider_IPL4.main(g_nsvc_config, g_config, id)); |
| 535 | #ifdef NS_EMULATION_FR |
| 536 | } else if (ischosen(g_nsvc_config.provider.fr)) { |
| 537 | vc_NSP_FR := NS_Provider_FR_CT.create(id & "-provFR"); |
| 538 | connect(self:NSCP, vc_NSP_FR:NSE); |
| 539 | vc_NSP_FR.start(NS_Provider_FR.main(g_nsvc_config, g_config, id)); |
| 540 | #endif |
Harald Welte | e15299a | 2020-11-17 17:30:09 +0100 | [diff] [blame] | 541 | } else { |
| 542 | Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, "Unsupported NS provider"); |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 543 | } |
| 544 | |
| 545 | f_change_state(NSVC_S_DEAD_BLOCKED); |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 546 | } |
| 547 | |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 548 | private function f_change_state(NsvcState new_state) runs on NSVC_CT { |
| 549 | var NsvcState old_state := vc_state; |
| 550 | vc_state := new_state; |
| 551 | log("NSVC ", g_nsvc_config.nsvci, " State Transition: ", old_state, " -> ", new_state); |
| 552 | NS_SP.send(ts_NsStsInd(g_config.nsei, g_nsvc_config.nsvci, old_state, new_state)); |
| 553 | } |
| 554 | |
| 555 | private function f_sendReset() runs on NSVC_CT { |
| 556 | NSCP.send(ts_NS_RESET(NS_CAUSE_OM_INTERVENTION, g_nsvc_config.nsvci, g_config.nsei)); |
Harald Welte | 3dd8355 | 2020-09-14 11:38:01 +0200 | [diff] [blame] | 557 | Tns_reset.start; |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 558 | vc_state := NSVC_S_WAIT_RESET; |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 559 | } |
| 560 | |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 561 | private function f_sendAlive() runs on NSVC_CT { |
Harald Welte | 013d65a | 2020-09-13 14:41:31 +0200 | [diff] [blame] | 562 | NSCP.send(t_NS_ALIVE); |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 563 | Tns_alive.start; |
| 564 | } |
| 565 | |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 566 | private function f_sendUnblock() runs on NSVC_CT { |
Harald Welte | 013d65a | 2020-09-13 14:41:31 +0200 | [diff] [blame] | 567 | NSCP.send(t_NS_UNBLOCK); |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 568 | Tns_block.start; |
| 569 | } |
| 570 | |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 571 | private function f_sendBlock(NsCause cause) runs on NSVC_CT { |
| 572 | NSCP.send(ts_NS_BLOCK(cause, g_nsvc_config.nsvci)); |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 573 | Tns_block.start; |
| 574 | } |
| 575 | |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 576 | private altstep as_allstate() runs on NSVC_CT { |
Harald Welte | 013d65a | 2020-09-13 14:41:31 +0200 | [diff] [blame] | 577 | var PDU_NS rf; |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 578 | var ASP_Event evt; |
| 579 | |
| 580 | /* transition to DEAD if t_alive times out */ |
Harald Welte | 9a7c512 | 2020-09-14 11:35:57 +0200 | [diff] [blame] | 581 | [] Tns_alive.timeout { |
| 582 | log("Tns-alive expired: changing to DEAD_BLOCKED + starting Tns-test"); |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 583 | f_change_state(NSVC_S_DEAD_BLOCKED); |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 584 | Tns_test.start; |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 585 | } |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 586 | |
Harald Welte | 9a7c512 | 2020-09-14 11:35:57 +0200 | [diff] [blame] | 587 | [] Tns_test.timeout { |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 588 | log("Tns-test expired: sending NS-ALIVE"); |
| 589 | f_sendAlive(); |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 590 | } |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 591 | |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 592 | /* Stop t_alive when receiving ALIVE-ACK */ |
Harald Welte | 9a7c512 | 2020-09-14 11:35:57 +0200 | [diff] [blame] | 593 | [Tns_alive.running] NSCP.receive(t_NS_ALIVE_ACK) { |
Daniel Willmann | 654f85e | 2020-10-12 18:10:06 +0200 | [diff] [blame] | 594 | log("Rx NS-ALIVE-ACK: stopping Tns-alive; starting Tns-test"); |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 595 | Tns_alive.stop; |
| 596 | Tns_test.start; |
| 597 | } |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 598 | |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 599 | /* respond to NS-ALIVE with NS-ALIVE-ACK */ |
Harald Welte | 013d65a | 2020-09-13 14:41:31 +0200 | [diff] [blame] | 600 | [] NSCP.receive(t_NS_ALIVE) { |
| 601 | NSCP.send(t_NS_ALIVE_ACK); |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 602 | } |
| 603 | |
| 604 | /* Respond to BLOCK for wrong NSVCI */ |
Harald Welte | 013d65a | 2020-09-13 14:41:31 +0200 | [diff] [blame] | 605 | [] NSCP.receive(tr_NS_BLOCK(?, ?)) -> value rf { |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 606 | log("Rx NS-BLOCK for unknown NSVCI"); |
| 607 | /* FIXME */ |
| 608 | } |
| 609 | |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 610 | [not g_config.handle_sns] as_handle_reset(); |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 611 | |
Harald Welte | 1308dbb | 2021-01-18 18:19:38 +0100 | [diff] [blame] | 612 | [g_config.handle_sns and ischosen(g_nsvc_config.provider.ip)] as_nsvc_sns(); |
Harald Welte | 5e514fa | 2018-07-05 00:01:45 +0200 | [diff] [blame] | 613 | |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 614 | /* default case of handling unknown PDUs */ |
Harald Welte | 013d65a | 2020-09-13 14:41:31 +0200 | [diff] [blame] | 615 | [] NSCP.receive(PDU_NS: ?) -> value rf { |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 616 | log("Rx Unexpected NS PDU ", rf," in state ", vc_state); |
Harald Welte | 013d65a | 2020-09-13 14:41:31 +0200 | [diff] [blame] | 617 | NSCP.send(ts_NS_STATUS(NS_CAUSE_PDU_NOT_COMPATIBLE_WITH_PROTOCOL_STATE, rf)); |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 618 | } |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 619 | } |
| 620 | |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 621 | private altstep as_handle_reset() runs on NSVC_CT { |
Daniel Willmann | 654f85e | 2020-10-12 18:10:06 +0200 | [diff] [blame] | 622 | var PDU_NS rf; |
| 623 | |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 624 | [g_config.role_sgsn] NSCP.receive(NS_Provider_Evt:{link_status:=NS_PROV_LINK_STATUS_UP}) { |
Daniel Willmann | 654f85e | 2020-10-12 18:10:06 +0200 | [diff] [blame] | 625 | log("Provider Link came up: waiting for NS-RESET"); |
| 626 | } |
| 627 | |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 628 | [not g_config.role_sgsn] NSCP.receive(NS_Provider_Evt:{link_status:=NS_PROV_LINK_STATUS_UP}) { |
Daniel Willmann | 654f85e | 2020-10-12 18:10:06 +0200 | [diff] [blame] | 629 | log("Provider Link came up: sending NS-RESET"); |
| 630 | f_sendReset(); |
| 631 | } |
| 632 | |
| 633 | /* Respond to RESET with correct NSEI/NSVCI */ |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 634 | [] NSCP.receive(tr_NS_RESET(?, g_nsvc_config.nsvci, g_config.nsei)) -> value rf { |
| 635 | f_change_state(NSVC_S_ALIVE_BLOCKED); |
| 636 | NSCP.send(ts_NS_RESET_ACK(g_nsvc_config.nsvci, g_config.nsei)); |
Daniel Willmann | 654f85e | 2020-10-12 18:10:06 +0200 | [diff] [blame] | 637 | log("Rx NS-RESET: Sending NS-ALIVE"); |
| 638 | f_sendAlive(); |
| 639 | Tns_test.start; |
| 640 | } |
| 641 | |
| 642 | /* Respond to RESET with wrong NSEI/NSVCI */ |
| 643 | [] NSCP.receive(tr_NS_RESET(?, ?, ?)) -> value rf { |
| 644 | log("Rx NS-RESET for unknown NSEI/NSVCI"); |
| 645 | /* FIXME */ |
| 646 | } |
| 647 | } |
| 648 | |
Harald Welte | 1308dbb | 2021-01-18 18:19:38 +0100 | [diff] [blame] | 649 | private altstep as_nsvc_sns() runs on NSVC_CT { |
Harald Welte | 013d65a | 2020-09-13 14:41:31 +0200 | [diff] [blame] | 650 | var PDU_NS rf; |
Harald Welte | 1308dbb | 2021-01-18 18:19:38 +0100 | [diff] [blame] | 651 | var SnsRequest sreq; |
Alexander Couzens | d533890 | 2020-12-21 18:41:21 +0100 | [diff] [blame] | 652 | [] NSCP.receive(NS_Provider_Evt:{link_status:=NS_PROV_LINK_STATUS_UP}) { |
| 653 | log("Provider Link came up. Waiting for SNS Size"); |
Harald Welte | 1308dbb | 2021-01-18 18:19:38 +0100 | [diff] [blame] | 654 | } |
Daniel Willmann | 654f85e | 2020-10-12 18:10:06 +0200 | [diff] [blame] | 655 | |
Harald Welte | 1308dbb | 2021-01-18 18:19:38 +0100 | [diff] [blame] | 656 | /* pass up to NS-VCG */ |
| 657 | [] NSCP.receive(tr_SNS(g_config.nsei)) -> value rf { |
| 658 | NS_SP.send(SnsIndication:{g_nsvc_config.nsvci, rf}); |
Harald Welte | 5e514fa | 2018-07-05 00:01:45 +0200 | [diff] [blame] | 659 | } |
Harald Welte | 1308dbb | 2021-01-18 18:19:38 +0100 | [diff] [blame] | 660 | [] NSCP.receive(tr_SNS(?)) -> value rf { |
| 661 | setverdict(fail, "SNS from unexpected NSEI: ", rf); |
Harald Welte | 5e514fa | 2018-07-05 00:01:45 +0200 | [diff] [blame] | 662 | self.stop; |
| 663 | } |
Harald Welte | 1308dbb | 2021-01-18 18:19:38 +0100 | [diff] [blame] | 664 | [] NS_SP.receive(SnsRequest:{g_nsvc_config.nsvci, ?}) -> value sreq { |
| 665 | NSCP.send(sreq.ns); |
Harald Welte | 5e514fa | 2018-07-05 00:01:45 +0200 | [diff] [blame] | 666 | } |
Harald Welte | 1308dbb | 2021-01-18 18:19:38 +0100 | [diff] [blame] | 667 | [] NS_SP.receive(SnsRequest:?) -> value sreq { |
| 668 | setverdict(fail, "Unexpected SNS from NSVC: ", sreq); |
Harald Welte | 5e514fa | 2018-07-05 00:01:45 +0200 | [diff] [blame] | 669 | self.stop; |
| 670 | } |
Harald Welte | 1308dbb | 2021-01-18 18:19:38 +0100 | [diff] [blame] | 671 | [] NS_SP.receive(NsCtrlRequest:StartAliveProcedure) { |
| 672 | f_change_state(NSVC_S_ALIVE_UNBLOCKED); |
| 673 | f_sendAlive(); |
| 674 | Tns_test.start; |
Harald Welte | 5e514fa | 2018-07-05 00:01:45 +0200 | [diff] [blame] | 675 | } |
| 676 | } |
| 677 | |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 678 | private altstep as_alive_blocked() runs on NSVC_CT { |
Harald Welte | 4a6a663 | 2020-09-14 09:58:53 +0200 | [diff] [blame] | 679 | var PDU_NS rf; |
| 680 | /* bogus block, just respond with ACK */ |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 681 | [] NSCP.receive(tr_NS_BLOCK(?, g_nsvc_config.nsvci)) -> value rf { |
| 682 | NSCP.send(ts_NS_BLOCK_ACK(g_nsvc_config.nsvci)); |
Harald Welte | 4a6a663 | 2020-09-14 09:58:53 +0200 | [diff] [blame] | 683 | } |
| 684 | /* Respond to UNBLOCK with UNBLOCK-ACK + change state */ |
| 685 | [] NSCP.receive(t_NS_UNBLOCK) -> value rf { |
| 686 | NSCP.send(t_NS_UNBLOCK_ACK); |
| 687 | Tns_block.stop; |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 688 | f_change_state(NSVC_S_ALIVE_UNBLOCKED); |
Harald Welte | 4a6a663 | 2020-09-14 09:58:53 +0200 | [diff] [blame] | 689 | } |
| 690 | [] NSCP.receive(t_NS_UNBLOCK_ACK) -> value rf { |
| 691 | Tns_block.stop; |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 692 | f_change_state(NSVC_S_ALIVE_UNBLOCKED); |
Harald Welte | 4a6a663 | 2020-09-14 09:58:53 +0200 | [diff] [blame] | 693 | } |
Harald Welte | da9d938 | 2020-12-07 15:53:57 +0100 | [diff] [blame] | 694 | /* tolerate a late NS-BLOCK-ACK from peer */ |
| 695 | [] NSCP.receive(tr_NS_BLOCK_ACK(g_nsvc_config.nsvci)) -> value rf { |
| 696 | } |
Harald Welte | 4a6a663 | 2020-09-14 09:58:53 +0200 | [diff] [blame] | 697 | [] Tns_block.timeout { |
| 698 | /* repeat unblock transmission */ |
| 699 | f_sendUnblock(); |
| 700 | } |
| 701 | } |
| 702 | |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 703 | private altstep as_alive_unblocked() runs on NSVC_CT { |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 704 | var NsUnitdataRequest ud_req; |
Harald Welte | 013d65a | 2020-09-13 14:41:31 +0200 | [diff] [blame] | 705 | var PDU_NS rf; |
Harald Welte | 4a6a663 | 2020-09-14 09:58:53 +0200 | [diff] [blame] | 706 | /* bogus unblock, just respond with ACK */ |
| 707 | [] NSCP.receive(t_NS_UNBLOCK) -> value rf { |
| 708 | NSCP.send(t_NS_UNBLOCK_ACK); |
| 709 | } |
| 710 | /* Respond to BLOCK with BLOCK-ACK + change state */ |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 711 | [] NSCP.receive(tr_NS_BLOCK(?, g_nsvc_config.nsvci)) -> value rf { |
| 712 | NSCP.send(ts_NS_BLOCK_ACK(g_nsvc_config.nsvci)); |
Harald Welte | 4a6a663 | 2020-09-14 09:58:53 +0200 | [diff] [blame] | 713 | Tns_block.stop; |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 714 | f_change_state(NSVC_S_ALIVE_BLOCKED); |
Harald Welte | 4a6a663 | 2020-09-14 09:58:53 +0200 | [diff] [blame] | 715 | } |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 716 | [] NSCP.receive(tr_NS_BLOCK_ACK(g_nsvc_config.nsvci)) -> value rf { |
Harald Welte | 4a6a663 | 2020-09-14 09:58:53 +0200 | [diff] [blame] | 717 | Tns_block.stop; |
| 718 | } |
Harald Welte | da9d938 | 2020-12-07 15:53:57 +0100 | [diff] [blame] | 719 | /* tolerate a late NS-UNBLOCK-ACK from peer */ |
| 720 | [] NSCP.receive(t_NS_UNBLOCK_ACK) -> value rf { |
| 721 | } |
Harald Welte | be7afce | 2021-01-17 22:04:36 +0100 | [diff] [blame^] | 722 | |
| 723 | [not ischosen(g_nsvc_config.provider.ip) or |
| 724 | g_nsvc_config.provider.ip.data_weight > 0] as_alive_unblocked_data(); |
| 725 | |
| 726 | [not ischosen(g_nsvc_config.provider.ip) or |
| 727 | g_nsvc_config.provider.ip.signalling_weight > 0] as_alive_unblocked_sig(); |
| 728 | |
| 729 | /* catch any violations of above rule */ |
| 730 | [ischosen(g_nsvc_config.provider.ip)] NSCP.receive(tr_NS_UNITDATA(?, ?, ?)) -> value rf { |
| 731 | Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, |
| 732 | log2str("Unexpected Rx NS-UNITDATA on NSVC with data_weight=", |
| 733 | g_nsvc_config.provider.ip.data_weight, ", sig_weight=", |
| 734 | g_nsvc_config.provider.ip.signalling_weight, ": ", rf)); |
| 735 | } |
| 736 | [ischosen(g_nsvc_config.provider.ip)] NS_SP.receive(tr_NsUdReq(g_config.nsei, ?, ?, *, *)) -> value ud_req { |
| 737 | Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, |
| 738 | log2str("Unexpected Rx TX-UNITDATA on NSVC with data_weight=", |
| 739 | g_nsvc_config.provider.ip.data_weight, ", sig_weight=", |
| 740 | g_nsvc_config.provider.ip.signalling_weight, ": ", ud_req)); |
| 741 | } |
| 742 | } |
| 743 | |
| 744 | /* user data transfer; only permitted for some NS-VC */ |
| 745 | private altstep as_alive_unblocked_data() runs on NSVC_CT { |
| 746 | var NsUnitdataRequest ud_req; |
| 747 | var PDU_NS rf; |
Harald Welte | 4a6a663 | 2020-09-14 09:58:53 +0200 | [diff] [blame] | 748 | /* NS-UNITDATA PDU from network to NS-UNITDATA.ind to user */ |
Harald Welte | be7afce | 2021-01-17 22:04:36 +0100 | [diff] [blame^] | 749 | [] NSCP.receive(tr_NS_UNITDATA_User(?, ?)) -> value rf { |
Harald Welte | 80a249a | 2020-11-17 19:57:40 +0100 | [diff] [blame] | 750 | NS_SP.send(ts_NsUdInd(g_config.nsei, g_nsvc_config.nsvci, |
Harald Welte | 4a6a663 | 2020-09-14 09:58:53 +0200 | [diff] [blame] | 751 | oct2int(rf.pDU_NS_Unitdata.bVCI), |
| 752 | rf.pDU_NS_Unitdata.nS_SDU)); |
| 753 | } |
| 754 | /* NS-UNITDATA.req from user to NS-UNITDATA PDU on network */ |
Harald Welte | be7afce | 2021-01-17 22:04:36 +0100 | [diff] [blame^] | 755 | [] NS_SP.receive(tr_NsUdReq(g_config.nsei, t_BssgpBvciUser, ?, ?, omit)) -> value ud_req { |
Harald Welte | 4a6a663 | 2020-09-14 09:58:53 +0200 | [diff] [blame] | 756 | /* using raw octetstring PDU */ |
| 757 | NSCP.send(ts_NS_UNITDATA(t_SduCtrlB, ud_req.bvci, ud_req.sdu)); |
| 758 | } |
Harald Welte | be7afce | 2021-01-17 22:04:36 +0100 | [diff] [blame^] | 759 | [] NS_SP.receive(tr_NsUdReq(g_config.nsei, t_BssgpBvciUser, ?, omit, ?)) -> value ud_req { |
| 760 | /* using decoded BSSGP PDU that we need to encode first */ |
| 761 | var octetstring enc := enc_PDU_BSSGP(ud_req.bssgp); |
| 762 | NSCP.send(ts_NS_UNITDATA(t_SduCtrlB, ud_req.bvci, enc)); |
| 763 | } |
| 764 | } |
| 765 | |
| 766 | /* signalling (BVCI=0) transfer; only permitted for some NS-VC */ |
| 767 | private altstep as_alive_unblocked_sig() runs on NSVC_CT { |
| 768 | var NsUnitdataRequest ud_req; |
| 769 | var PDU_NS rf; |
| 770 | /* NS-UNITDATA PDU from network to NS-UNITDATA.ind to user */ |
| 771 | [] NSCP.receive(tr_NS_UNITDATA(?, 0, ?)) -> value rf { |
| 772 | NS_SP.send(ts_NsUdInd(g_config.nsei, g_nsvc_config.nsvci, |
| 773 | oct2int(rf.pDU_NS_Unitdata.bVCI), |
| 774 | rf.pDU_NS_Unitdata.nS_SDU)); |
| 775 | } |
| 776 | /* NS-UNITDATA.req from user to NS-UNITDATA PDU on network */ |
| 777 | [] NS_SP.receive(tr_NsUdReq(g_config.nsei, 0, ?, ?, omit)) -> value ud_req { |
| 778 | /* using raw octetstring PDU */ |
| 779 | NSCP.send(ts_NS_UNITDATA(t_SduCtrlB, ud_req.bvci, ud_req.sdu)); |
| 780 | } |
| 781 | [] NS_SP.receive(tr_NsUdReq(g_config.nsei, 0, ?, omit, ?)) -> value ud_req { |
Harald Welte | 4a6a663 | 2020-09-14 09:58:53 +0200 | [diff] [blame] | 782 | /* using decoded BSSGP PDU that we need to encode first */ |
| 783 | var octetstring enc := enc_PDU_BSSGP(ud_req.bssgp); |
| 784 | NSCP.send(ts_NS_UNITDATA(t_SduCtrlB, ud_req.bvci, enc)); |
| 785 | } |
| 786 | } |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 787 | |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 788 | private altstep as_wait_reset() runs on NSVC_CT { |
Harald Welte | 4a6a663 | 2020-09-14 09:58:53 +0200 | [diff] [blame] | 789 | var PDU_NS rf; |
Harald Welte | 3dd8355 | 2020-09-14 11:38:01 +0200 | [diff] [blame] | 790 | [] Tns_reset.timeout { |
| 791 | /* If the sending entity of an NS-RESET PDU receives no NS-RESET-ACK PDU before timer |
| 792 | * Tns-reset expires the corresponding NS-VCs shall remain blocked and dead and the |
| 793 | * entire reset procedure shall be repeated */ |
| 794 | f_sendReset(); |
| 795 | } |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 796 | [] NSCP.receive(tr_NS_RESET_ACK(g_nsvc_config.nsvci, g_config.nsei)) -> value rf { |
Harald Welte | 3dd8355 | 2020-09-14 11:38:01 +0200 | [diff] [blame] | 797 | Tns_reset.stop; |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 798 | f_change_state(NSVC_S_ALIVE_BLOCKED); |
Harald Welte | 4a6a663 | 2020-09-14 09:58:53 +0200 | [diff] [blame] | 799 | f_sendAlive(); |
| 800 | f_sendUnblock(); |
| 801 | } |
| 802 | } |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 803 | |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 804 | private function f_ScanEvents() runs on NSVC_CT { |
Harald Welte | 4a6a663 | 2020-09-14 09:58:53 +0200 | [diff] [blame] | 805 | var PDU_NS rf; |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 806 | while (true) { |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 807 | alt { |
Harald Welte | 90f1974 | 2020-11-06 19:34:40 +0100 | [diff] [blame] | 808 | [vc_state == NSVC_S_WAIT_RESET] as_wait_reset(); |
| 809 | [vc_state == NSVC_S_ALIVE_BLOCKED] as_alive_blocked(); |
| 810 | [vc_state == NSVC_S_ALIVE_UNBLOCKED] as_alive_unblocked(); |
Harald Welte | 4a6a663 | 2020-09-14 09:58:53 +0200 | [diff] [blame] | 811 | [] as_allstate(); |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 812 | } |
| 813 | } |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 814 | } |
| 815 | } |