Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 1 | module NS_Emulation { |
| 2 | import from NS_Types all; |
| 3 | import from BSSGP_Types all; |
Harald Welte | e0abc47 | 2018-02-05 09:13:31 +0100 | [diff] [blame] | 4 | import from Osmocom_Gb_Types all; |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 5 | import from NS_CodecPort all; |
| 6 | import from NS_CodecPort_CtrlFunct all; |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 7 | import from IPL4asp_Types all; |
| 8 | |
| 9 | type record NsUnitdataRequest { |
| 10 | BssgpBvci bvci, |
| 11 | Nsei nsei, |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 12 | octetstring sdu optional, |
Harald Welte | e0abc47 | 2018-02-05 09:13:31 +0100 | [diff] [blame] | 13 | PDU_BSSGP bssgp optional |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 14 | } |
| 15 | |
| 16 | template NsUnitdataRequest t_NsUdReq(template Nsei nsei, template BssgpBvci bvci, template octetstring sdu, |
Harald Welte | e0abc47 | 2018-02-05 09:13:31 +0100 | [diff] [blame] | 17 | template PDU_BSSGP bssgp) := { |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 18 | bvci := bvci, |
| 19 | nsei := nsei, |
| 20 | sdu := sdu, |
| 21 | bssgp := bssgp |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 22 | } |
| 23 | |
| 24 | type record NsUnitdataIndication { |
| 25 | BssgpBvci bvci, |
| 26 | Nsei nsei, |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 27 | octetstring sdu optional, |
Harald Welte | e0abc47 | 2018-02-05 09:13:31 +0100 | [diff] [blame] | 28 | PDU_BSSGP bssgp optional |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 29 | } |
| 30 | |
| 31 | template NsUnitdataIndication t_NsUdInd(Nsei nsei, BssgpBvci bvci, octetstring sdu) := { |
| 32 | bvci := bvci, |
| 33 | nsei := nsei, |
| 34 | sdu := sdu, |
Harald Welte | e0abc47 | 2018-02-05 09:13:31 +0100 | [diff] [blame] | 35 | bssgp := dec_PDU_BSSGP(sdu) |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 36 | } |
| 37 | |
| 38 | type record NsStatusIndication { |
| 39 | Nsei nsei, |
| 40 | Nsvci nsvci, |
| 41 | NseState old_state, |
| 42 | NseState new_state |
| 43 | } |
| 44 | |
| 45 | template NsStatusIndication t_NsStsInd(Nsei nsei, Nsvci nsvci, NseState old_state, NseState state) := { |
| 46 | nsei := nsei, |
| 47 | nsvci := nsvci, |
| 48 | old_state := old_state, |
| 49 | new_state := state |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 50 | } |
| 51 | |
| 52 | type enumerated NseState { |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 53 | NSE_S_DEAD_BLOCKED, |
| 54 | NSE_S_WAIT_RESET, |
| 55 | NSE_S_ALIVE_BLOCKED, |
| 56 | NSE_S_ALIVE_UNBLOCKED |
| 57 | } |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 58 | |
| 59 | /* port from our (internal) point of view */ |
| 60 | type port NS_SP_PT message { |
| 61 | in NsUnitdataRequest; |
| 62 | out NsUnitdataIndication, |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 63 | NsStatusIndication, |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 64 | ASP_Event; |
| 65 | } with { extension "internal" }; |
| 66 | |
| 67 | /* port from the user point of view */ |
| 68 | type port NS_PT message { |
| 69 | in ASP_Event, |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 70 | NsStatusIndication, |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 71 | NsUnitdataIndication; |
| 72 | out NsUnitdataRequest; |
| 73 | } with { extension "internal" }; |
| 74 | |
Alexander Couzens | 2c12b24 | 2018-07-31 00:30:11 +0200 | [diff] [blame] | 75 | function NSStart(NSConfiguration init_config) runs on NS_CT { |
| 76 | config := init_config; |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 77 | f_init(); |
| 78 | f_ScanEvents(); |
| 79 | } |
| 80 | |
| 81 | private function f_init() runs on NS_CT { |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 82 | var Result res; |
| 83 | /* Connect the UDP socket */ |
Alexander Couzens | 2c12b24 | 2018-07-31 00:30:11 +0200 | [diff] [blame] | 84 | res := f_IPL4_connect(NSCP, config.remote_ip, config.remote_udp_port, config.local_ip, config.local_udp_port, 0, { udp := {}}); |
Harald Welte | 9220f63 | 2018-05-23 20:27:02 +0200 | [diff] [blame] | 85 | if (not ispresent(res.connId)) { |
Max | 39e6cae | 2018-11-06 19:00:50 +0100 | [diff] [blame] | 86 | setverdict(fail, "Could not connect NS UDP socket from " & |
| 87 | config.local_ip & ":" & int2str(config.local_udp_port) & |
| 88 | " to " & config.remote_ip & ":" & int2str(config.remote_udp_port)); |
Daniel Willmann | e4ff537 | 2018-07-05 17:35:03 +0200 | [diff] [blame] | 89 | mtc.stop; |
Harald Welte | 9220f63 | 2018-05-23 20:27:02 +0200 | [diff] [blame] | 90 | } |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 91 | g_conn_id := res.connId; |
| 92 | f_change_state(NSE_S_DEAD_BLOCKED); |
| 93 | /* Send the first NS-ALIVE to test the connection */ |
| 94 | f_sendReset(); |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 95 | } |
| 96 | |
| 97 | type component NS_CT { |
| 98 | /* UDP port towards the bottom (IUT) */ |
| 99 | port NS_CODEC_PT NSCP; |
| 100 | /* NS-User SAP towards the user */ |
| 101 | port NS_SP_PT NS_SP; |
| 102 | |
Alexander Couzens | 2c12b24 | 2018-07-31 00:30:11 +0200 | [diff] [blame] | 103 | var NSConfiguration config; |
| 104 | |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 105 | var NseState g_state := NSE_S_DEAD_BLOCKED; |
| 106 | var ConnectionId g_conn_id := -1; |
| 107 | |
| 108 | timer Tns_alive := 3.0; |
| 109 | timer Tns_test := 10.0; |
| 110 | timer Tns_block := 10.0; |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 111 | } |
| 112 | |
Alexander Couzens | 2c12b24 | 2018-07-31 00:30:11 +0200 | [diff] [blame] | 113 | type record NSConfiguration { |
| 114 | PortNumber local_udp_port, |
| 115 | charstring local_ip, |
| 116 | PortNumber remote_udp_port, |
| 117 | charstring remote_ip, |
| 118 | Nsvci nsvci, |
Harald Welte | 5e514fa | 2018-07-05 00:01:45 +0200 | [diff] [blame^] | 119 | Nsvci nsei, |
| 120 | boolean role_sgsn, |
| 121 | boolean handle_sns |
Alexander Couzens | 2c12b24 | 2018-07-31 00:30:11 +0200 | [diff] [blame] | 122 | } |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 123 | |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 124 | private function f_change_state(NseState new_state) runs on NS_CT { |
| 125 | var NseState old_state := g_state; |
| 126 | g_state := new_state; |
| 127 | log("NS State Transition: ", old_state, " -> ", new_state); |
Alexander Couzens | 2c12b24 | 2018-07-31 00:30:11 +0200 | [diff] [blame] | 128 | NS_SP.send(t_NsStsInd(config.nsei, config.nsvci, old_state, new_state)); |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 129 | } |
| 130 | |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 131 | private function f_sendReset() runs on NS_CT { |
Harald Welte | 387ab37 | 2018-06-30 10:27:06 +0200 | [diff] [blame] | 132 | NSCP.send(t_NS_Send(g_conn_id, ts_NS_RESET(NS_CAUSE_OM_INTERVENTION, config.nsvci, config.nsei))); |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 133 | g_state := NSE_S_WAIT_RESET; |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 134 | } |
| 135 | |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 136 | private function f_sendAlive() runs on NS_CT { |
| 137 | NSCP.send(t_NS_Send(g_conn_id, t_NS_ALIVE)); |
| 138 | Tns_alive.start; |
| 139 | } |
| 140 | |
| 141 | private function f_sendUnblock() runs on NS_CT { |
| 142 | NSCP.send(t_NS_Send(g_conn_id, t_NS_UNBLOCK)); |
| 143 | Tns_block.start; |
| 144 | } |
| 145 | |
| 146 | private function f_sendBlock(NsCause cause) runs on NS_CT { |
Harald Welte | 387ab37 | 2018-06-30 10:27:06 +0200 | [diff] [blame] | 147 | NSCP.send(t_NS_Send(g_conn_id, ts_NS_BLOCK(cause, config.nsvci))); |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 148 | Tns_block.start; |
| 149 | } |
| 150 | |
| 151 | altstep as_allstate() runs on NS_CT { |
| 152 | var NS_RecvFrom rf; |
| 153 | var ASP_Event evt; |
| 154 | |
| 155 | /* transition to DEAD if t_alive times out */ |
Harald Welte | c27f684 | 2018-03-02 21:40:03 +0100 | [diff] [blame] | 156 | [Tns_alive.running] Tns_alive.timeout { |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 157 | log("Tns-alive expired: changing to DEAD_BLOCKED + starting Tns-test"); |
| 158 | f_change_state(NSE_S_DEAD_BLOCKED); |
| 159 | Tns_test.start; |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 160 | } |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 161 | |
Harald Welte | c27f684 | 2018-03-02 21:40:03 +0100 | [diff] [blame] | 162 | [Tns_test.running] Tns_test.timeout { |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 163 | log("Tns-test expired: sending NS-ALIVE"); |
| 164 | f_sendAlive(); |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 165 | } |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 166 | |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 167 | /* Stop t_alive when receiving ALIVE-ACK */ |
| 168 | [] NSCP.receive(t_NS_RecvFrom(t_NS_ALIVE_ACK)) { |
| 169 | log("NS-ALIVE-ACK received: stopping Tns-alive; starting Tns-test"); |
| 170 | Tns_alive.stop; |
| 171 | Tns_test.start; |
| 172 | } |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 173 | |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 174 | /* respond to NS-ALIVE with NS-ALIVE-ACK */ |
| 175 | [] NSCP.receive(t_NS_RecvFrom(t_NS_ALIVE)) { |
| 176 | NSCP.send(t_NS_Send(g_conn_id, t_NS_ALIVE_ACK)); |
| 177 | } |
| 178 | |
| 179 | /* Respond to BLOCK for wrong NSVCI */ |
Harald Welte | 387ab37 | 2018-06-30 10:27:06 +0200 | [diff] [blame] | 180 | [] NSCP.receive(t_NS_RecvFrom(tr_NS_BLOCK(?, ?))) -> value rf { |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 181 | log("Rx NS-BLOCK for unknown NSVCI"); |
| 182 | /* FIXME */ |
| 183 | } |
| 184 | |
| 185 | /* Respond to RESET with correct NSEI/NSVCI */ |
Harald Welte | 387ab37 | 2018-06-30 10:27:06 +0200 | [diff] [blame] | 186 | [] NSCP.receive(t_NS_RecvFrom(tr_NS_RESET(?, config.nsvci, config.nsei))) -> value rf { |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 187 | f_change_state(NSE_S_ALIVE_BLOCKED); |
Harald Welte | 387ab37 | 2018-06-30 10:27:06 +0200 | [diff] [blame] | 188 | NSCP.send(t_NS_Send(g_conn_id, ts_NS_RESET_ACK(config.nsvci, config.nsei))); |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 189 | } |
| 190 | |
| 191 | /* Respond to RESET with wrong NSEI/NSVCI */ |
Harald Welte | 387ab37 | 2018-06-30 10:27:06 +0200 | [diff] [blame] | 192 | [] NSCP.receive(t_NS_RecvFrom(tr_NS_RESET(?, ?, ?))) -> value rf { |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 193 | log("Rx NS-RESET for unknown NSEI/NSVCI"); |
| 194 | /* FIXME */ |
| 195 | } |
| 196 | |
Harald Welte | 5e514fa | 2018-07-05 00:01:45 +0200 | [diff] [blame^] | 197 | [config.role_sgsn and config.handle_sns] as_sns_sgsn(); |
| 198 | |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 199 | /* default case of handling unknown PDUs */ |
| 200 | [] NSCP.receive(t_NS_RecvFrom(?)) -> value rf { |
| 201 | log("Rx Unexpected NS PDU ", rf.msg," in state ", g_state); |
Harald Welte | e0abc47 | 2018-02-05 09:13:31 +0100 | [diff] [blame] | 202 | NSCP.send(t_NS_Send(g_conn_id, ts_NS_STATUS(NS_CAUSE_PDU_NOT_COMPATIBLE_WITH_PROTOCOL_STATE, rf.msg))); |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 203 | } |
| 204 | /* Forwarding of ASP_Evet to user */ |
| 205 | [] NSCP.receive(ASP_Event:?) -> value evt { NS_SP.send(evt); } |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 206 | } |
| 207 | |
Harald Welte | 5e514fa | 2018-07-05 00:01:45 +0200 | [diff] [blame^] | 208 | /* simple IP Sub-Network Service responder for the SGSN side. This is not a full implementation |
| 209 | * of the protocol, merely sufficient to make the PCU/BSS side happy to proceed */ |
| 210 | altstep as_sns_sgsn() runs on NS_CT { |
| 211 | var NS_RecvFrom rf; |
| 212 | [] NSCP.receive(t_NS_RecvFrom(tr_SNS_SIZE(config.nsei))) -> value rf { |
| 213 | /* blindly acknowledge whatever the PCU sends */ |
| 214 | NSCP.send(t_NS_Send(g_conn_id, ts_SNS_SIZE_ACK(config.nsei, omit))); |
| 215 | } |
| 216 | [] NSCP.receive(t_NS_RecvFrom(tr_SNS_SIZE(?))) { |
| 217 | setverdict(fail, "SNS-SIZE from unexpected NSEI"); |
| 218 | self.stop; |
| 219 | } |
| 220 | [] NSCP.receive(t_NS_RecvFrom(tr_SNS_CONFIG(config.nsei, true, |
| 221 | {tr_SNS_IPv4(config.remote_ip, config.remote_udp_port)}))) -> value rf { |
| 222 | /* blindly acknowledge whatever the PCU sends */ |
| 223 | NSCP.send(t_NS_Send(g_conn_id, ts_SNS_CONFIG_ACK(config.nsei, omit))); |
| 224 | /* send a SNS-CONFIG in response and expect a SNS-CONFIG-ACK */ |
| 225 | var IP4_Elements v4 := { valueof(ts_SNS_IPv4(config.local_ip, config.local_udp_port)) }; |
| 226 | NSCP.send(t_NS_Send(g_conn_id, ts_SNS_CONFIG(config.nsei, true, v4))); |
| 227 | alt { |
| 228 | [] NSCP.receive(t_NS_RecvFrom(tr_SNS_CONFIG_ACK(config.nsei, omit))) { |
| 229 | /* success */ |
| 230 | } |
| 231 | [] NSCP.receive(t_NS_RecvFrom(tr_SNS_CONFIG_ACK(config.nsei, ?))) { |
| 232 | setverdict(fail, "Unexpected SNS-CONFIG-NACK"); |
| 233 | self.stop; |
| 234 | } |
| 235 | } |
| 236 | } |
| 237 | [] NSCP.receive(t_NS_RecvFrom(tr_SNS_CONFIG(config.nsei, false, ?))) { /* ignore */} |
| 238 | [] NSCP.receive(t_NS_RecvFrom(tr_SNS_CONFIG(config.nsei, true, ?))) { |
| 239 | setverdict(fail, "Unexpected SNS-CONFIG content"); |
| 240 | self.stop; |
| 241 | } |
| 242 | [] NSCP.receive(t_NS_RecvFrom(tr_SNS_CONFIG(?, ?, ?))) { |
| 243 | setverdict(fail, "SNS-CONFIG from unexpected NSEI"); |
| 244 | self.stop; |
| 245 | } |
| 246 | } |
| 247 | |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 248 | private function f_ScanEvents() runs on NS_CT { |
| 249 | var NsUnitdataRequest ud_req; |
| 250 | var NS_RecvFrom rf; |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 251 | var default d; |
| 252 | |
| 253 | d := activate(as_allstate()); |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 254 | |
| 255 | while (true) { |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 256 | if (g_state == NSE_S_DEAD_BLOCKED) { |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 257 | alt { |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 258 | [false] any timer.timeout {} |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 259 | } |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 260 | } else if (g_state == NSE_S_WAIT_RESET) { |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 261 | alt { |
Harald Welte | 387ab37 | 2018-06-30 10:27:06 +0200 | [diff] [blame] | 262 | [] NSCP.receive(t_NS_RecvFrom(tr_NS_RESET_ACK(config.nsvci, config.nsei))) -> value rf { |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 263 | f_change_state(NSE_S_ALIVE_BLOCKED); |
| 264 | f_sendAlive(); |
| 265 | f_sendUnblock(); |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 266 | } |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 267 | } |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 268 | } else if (g_state == NSE_S_ALIVE_BLOCKED) { |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 269 | alt { |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 270 | /* bogus block, just respond with ACK */ |
Harald Welte | 387ab37 | 2018-06-30 10:27:06 +0200 | [diff] [blame] | 271 | [] NSCP.receive(t_NS_RecvFrom(tr_NS_BLOCK(?, config.nsvci))) -> value rf { |
| 272 | NSCP.send(t_NS_Send(g_conn_id, ts_NS_BLOCK_ACK(config.nsvci))); |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 273 | } |
| 274 | /* Respond to UNBLOCK with UNBLOCK-ACK + change state */ |
| 275 | [] NSCP.receive(t_NS_RecvFrom(t_NS_UNBLOCK)) -> value rf { |
| 276 | NSCP.send(t_NS_Send(g_conn_id, t_NS_UNBLOCK_ACK)); |
| 277 | Tns_block.stop; |
| 278 | f_change_state(NSE_S_ALIVE_UNBLOCKED); |
| 279 | } |
| 280 | [] NSCP.receive(t_NS_RecvFrom(t_NS_UNBLOCK_ACK)) -> value rf { |
| 281 | Tns_block.stop; |
| 282 | f_change_state(NSE_S_ALIVE_UNBLOCKED); |
| 283 | } |
| 284 | [] Tns_block.timeout { |
| 285 | /* repeat unblock transmission */ |
| 286 | f_sendUnblock(); |
| 287 | } |
| 288 | } |
| 289 | } else if (g_state == NSE_S_ALIVE_UNBLOCKED) { |
| 290 | alt { |
| 291 | /* bogus unblock, just respond with ACK */ |
| 292 | [] NSCP.receive(t_NS_RecvFrom(t_NS_UNBLOCK)) -> value rf { |
| 293 | NSCP.send(t_NS_Send(g_conn_id, t_NS_UNBLOCK_ACK)); |
| 294 | } |
| 295 | /* Respond to BLOCK with BLOCK-ACK + change state */ |
Harald Welte | 387ab37 | 2018-06-30 10:27:06 +0200 | [diff] [blame] | 296 | [] NSCP.receive(t_NS_RecvFrom(tr_NS_BLOCK(?, config.nsvci))) -> value rf { |
| 297 | NSCP.send(t_NS_Send(g_conn_id, ts_NS_BLOCK_ACK(config.nsvci))); |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 298 | Tns_block.stop; |
| 299 | f_change_state(NSE_S_ALIVE_BLOCKED); |
| 300 | } |
Harald Welte | 387ab37 | 2018-06-30 10:27:06 +0200 | [diff] [blame] | 301 | [] NSCP.receive(t_NS_RecvFrom(tr_NS_BLOCK_ACK(config.nsvci))) -> value rf { |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 302 | Tns_block.stop; |
| 303 | } |
| 304 | /* NS-UNITDATA PDU from network to NS-UNITDATA.ind to user */ |
Harald Welte | 387ab37 | 2018-06-30 10:27:06 +0200 | [diff] [blame] | 305 | [] NSCP.receive(t_NS_RecvFrom(tr_NS_UNITDATA(?, ?, ?))) -> value rf { |
Alexander Couzens | 2c12b24 | 2018-07-31 00:30:11 +0200 | [diff] [blame] | 306 | NS_SP.send(t_NsUdInd(config.nsei, |
Harald Welte | e0abc47 | 2018-02-05 09:13:31 +0100 | [diff] [blame] | 307 | oct2int(rf.msg.pDU_NS_Unitdata.bVCI), |
| 308 | rf.msg.pDU_NS_Unitdata.nS_SDU)); |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 309 | } |
| 310 | /* NS-UNITDATA.req from user to NS-UNITDATA PDU on network */ |
Alexander Couzens | 2c12b24 | 2018-07-31 00:30:11 +0200 | [diff] [blame] | 311 | [] NS_SP.receive(t_NsUdReq(config.nsei, ?, ?, omit)) -> value ud_req { |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 312 | /* using raw octetstring PDU */ |
Harald Welte | 387ab37 | 2018-06-30 10:27:06 +0200 | [diff] [blame] | 313 | NSCP.send(t_NS_Send(g_conn_id, ts_NS_UNITDATA(t_SduCtrlB, ud_req.bvci, ud_req.sdu))); |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 314 | } |
Alexander Couzens | 2c12b24 | 2018-07-31 00:30:11 +0200 | [diff] [blame] | 315 | [] NS_SP.receive(t_NsUdReq(config.nsei, ?, omit, ?)) -> value ud_req { |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 316 | /* using decoded BSSGP PDU that we need to encode first */ |
Harald Welte | e0abc47 | 2018-02-05 09:13:31 +0100 | [diff] [blame] | 317 | var octetstring enc := enc_PDU_BSSGP(ud_req.bssgp); |
Harald Welte | 387ab37 | 2018-06-30 10:27:06 +0200 | [diff] [blame] | 318 | NSCP.send(t_NS_Send(g_conn_id, ts_NS_UNITDATA(t_SduCtrlB, ud_req.bvci, enc))); |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 319 | } |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 320 | } |
| 321 | } |
| 322 | |
Harald Welte | 6e594f2 | 2017-07-23 16:19:35 +0200 | [diff] [blame] | 323 | } /* while */ |
| 324 | //deactivate(d); |
Harald Welte | 6fff364 | 2017-07-22 21:36:13 +0200 | [diff] [blame] | 325 | } |
| 326 | } |