Daniel Willmann | fa870f5 | 2018-01-17 12:37:14 +0100 | [diff] [blame] | 1 | module MGCP_Emulation { |
| 2 | |
Harald Welte | a02515f | 2018-01-26 10:33:23 +0100 | [diff] [blame] | 3 | /* MGCP Emulation, runs on top of MGCP_CodecPort. It multiplexes/demultiplexes |
| 4 | * the individual connections, so there can be separate TTCN-3 components handling |
| 5 | * each of the connections. |
| 6 | * |
| 7 | * The MGCP_Emulation.main() function processes MGCP primitives from the MGCP |
| 8 | * socket via the MGCP_CodecPort, and dispatches them to the per-connection components. |
| 9 | * |
| 10 | * For each new inbound connection, the MgcpOps.create_cb() is called. It can create |
| 11 | * or resolve a TTCN-3 component, and returns a component reference to which that inbound |
| 12 | * connection is routed/dispatched. |
| 13 | * |
| 14 | * If a pre-existing component wants to register to handle a future inbound call, it can |
| 15 | * do so by registering an "expect" with the expected destination phone number. This is e.g. useful |
| 16 | * if you are simulating BSC + MGCP, and first trigger a connection from BSC side in a |
| 17 | * component which then subsequently should also handle the MGCP emulation. |
| 18 | * |
| 19 | * Inbound Unit Data messages (such as are dispatched to the MgcpOps.unitdata_cb() callback, |
| 20 | * which is registered with an argument to the main() function below. |
| 21 | * |
| 22 | * (C) 2017-2018 by Harald Welte <laforge@gnumonks.org> |
| 23 | * (C) 2018 by sysmocom - s.f.m.c. GmbH, Author: Daniel Willmann |
| 24 | * All rights reserved. |
| 25 | * |
| 26 | * Released under the terms of GNU General Public License, Version 2 or |
| 27 | * (at your option) any later version. |
| 28 | */ |
| 29 | |
Daniel Willmann | fa870f5 | 2018-01-17 12:37:14 +0100 | [diff] [blame] | 30 | import from MGCP_CodecPort all; |
| 31 | import from MGCP_CodecPort_CtrlFunct all; |
| 32 | import from MGCP_Types all; |
| 33 | import from MGCP_Templates all; |
| 34 | import from Osmocom_Types all; |
| 35 | import from IPL4asp_Types all; |
| 36 | |
| 37 | type component MGCP_ConnHdlr { |
| 38 | port MGCP_Conn_PT MGCP; |
Harald Welte | bb5a121 | 2018-01-26 10:34:44 +0100 | [diff] [blame] | 39 | /* procedure based port to register for incoming connections */ |
| 40 | port MGCPEM_PROC_PT MGCP_PROC; |
Daniel Willmann | fa870f5 | 2018-01-17 12:37:14 +0100 | [diff] [blame] | 41 | } |
| 42 | |
| 43 | /* port between individual per-connection components and this dispatcher */ |
| 44 | type port MGCP_Conn_PT message { |
| 45 | inout MgcpCommand, MgcpResponse; |
| 46 | } with { extension "internal" }; |
| 47 | |
Harald Welte | 9601c81 | 2018-01-26 18:58:20 +0100 | [diff] [blame] | 48 | /* represents a single MGCP Endpoint */ |
| 49 | type record EndpointData { |
Harald Welte | bb5a121 | 2018-01-26 10:34:44 +0100 | [diff] [blame] | 50 | MGCP_ConnHdlr comp_ref, |
Harald Welte | 9601c81 | 2018-01-26 18:58:20 +0100 | [diff] [blame] | 51 | MgcpEndpoint endpoint optional |
Harald Welte | bb5a121 | 2018-01-26 10:34:44 +0100 | [diff] [blame] | 52 | }; |
Daniel Willmann | fa870f5 | 2018-01-17 12:37:14 +0100 | [diff] [blame] | 53 | |
Harald Welte | 9601c81 | 2018-01-26 18:58:20 +0100 | [diff] [blame] | 54 | /* pending CRCX with their transaction ID */ |
| 55 | type set of MgcpTransId MgcpTransIds; |
| 56 | |
Daniel Willmann | fa870f5 | 2018-01-17 12:37:14 +0100 | [diff] [blame] | 57 | type component MGCP_Emulation_CT { |
| 58 | /* Port facing to the UDP SUT */ |
| 59 | port MGCP_CODEC_PT MGCP; |
| 60 | /* All MGCP_ConnHdlr MGCP ports connect here |
| 61 | * MGCP_Emulation_CT.main needs to figure out what messages |
| 62 | * to send where with CLIENT.send() to vc_conn */ |
Harald Welte | bb5a121 | 2018-01-26 10:34:44 +0100 | [diff] [blame] | 63 | port MGCP_Conn_PT MGCP_CLIENT; |
Daniel Willmann | fa870f5 | 2018-01-17 12:37:14 +0100 | [diff] [blame] | 64 | /* currently tracked connections */ |
Harald Welte | 9601c81 | 2018-01-26 18:58:20 +0100 | [diff] [blame] | 65 | var EndpointData MgcpEndpointTable[16]; |
| 66 | var MgcpTransIds MgcpPendingTrans := {}; |
Daniel Willmann | fa870f5 | 2018-01-17 12:37:14 +0100 | [diff] [blame] | 67 | /* pending expected CRCX */ |
Harald Welte | bb5a121 | 2018-01-26 10:34:44 +0100 | [diff] [blame] | 68 | var ExpectData MgcpExpectTable[8]; |
Daniel Willmann | fa870f5 | 2018-01-17 12:37:14 +0100 | [diff] [blame] | 69 | /* procedure based port to register for incoming connections */ |
Harald Welte | bb5a121 | 2018-01-26 10:34:44 +0100 | [diff] [blame] | 70 | port MGCPEM_PROC_PT MGCP_PROC; |
Daniel Willmann | fa870f5 | 2018-01-17 12:37:14 +0100 | [diff] [blame] | 71 | |
| 72 | var charstring g_mgcp_id; |
Daniel Willmann | 166bbb3 | 2018-01-17 15:28:04 +0100 | [diff] [blame] | 73 | var integer g_mgcp_conn_id := -1; |
Daniel Willmann | fa870f5 | 2018-01-17 12:37:14 +0100 | [diff] [blame] | 74 | } |
| 75 | |
| 76 | type function MGCPCreateCallback(MgcpCommand cmd, charstring id) |
| 77 | runs on MGCP_Emulation_CT return MGCP_ConnHdlr; |
| 78 | |
Harald Welte | bb5a121 | 2018-01-26 10:34:44 +0100 | [diff] [blame] | 79 | type function MGCPUnitdataCallback(MgcpMessage msg) |
| 80 | runs on MGCP_Emulation_CT return template MgcpMessage; |
| 81 | |
Daniel Willmann | fa870f5 | 2018-01-17 12:37:14 +0100 | [diff] [blame] | 82 | type record MGCPOps { |
Harald Welte | bb5a121 | 2018-01-26 10:34:44 +0100 | [diff] [blame] | 83 | MGCPCreateCallback create_cb, |
| 84 | MGCPUnitdataCallback unitdata_cb |
Daniel Willmann | fa870f5 | 2018-01-17 12:37:14 +0100 | [diff] [blame] | 85 | } |
| 86 | |
| 87 | type record MGCP_conn_parameters { |
Harald Welte | bb5a121 | 2018-01-26 10:34:44 +0100 | [diff] [blame] | 88 | HostName callagent_ip, |
| 89 | PortNumber callagent_udp_port, |
| 90 | HostName mgw_ip, |
| 91 | PortNumber mgw_udp_port |
Daniel Willmann | fa870f5 | 2018-01-17 12:37:14 +0100 | [diff] [blame] | 92 | } |
| 93 | |
Daniel Willmann | 166bbb3 | 2018-01-17 15:28:04 +0100 | [diff] [blame] | 94 | function tr_MGCP_RecvFrom_R(template MgcpMessage msg) |
| 95 | runs on MGCP_Emulation_CT return template MGCP_RecvFrom { |
| 96 | var template MGCP_RecvFrom mrf := { |
| 97 | connId := g_mgcp_conn_id, |
| 98 | remName := ?, |
| 99 | remPort := ?, |
| 100 | locName := ?, |
| 101 | locPort := ?, |
| 102 | msg := msg |
| 103 | } |
| 104 | return mrf; |
| 105 | } |
| 106 | |
Harald Welte | 9601c81 | 2018-01-26 18:58:20 +0100 | [diff] [blame] | 107 | private function f_ep_known(MgcpEndpoint ep) |
Harald Welte | bb5a121 | 2018-01-26 10:34:44 +0100 | [diff] [blame] | 108 | runs on MGCP_Emulation_CT return boolean { |
| 109 | var integer i; |
Harald Welte | 9601c81 | 2018-01-26 18:58:20 +0100 | [diff] [blame] | 110 | for (i := 0; i < sizeof(MgcpEndpointTable); i := i+1) { |
| 111 | if (MgcpEndpointTable[i].endpoint == ep) { |
Harald Welte | bb5a121 | 2018-01-26 10:34:44 +0100 | [diff] [blame] | 112 | return true; |
| 113 | } |
| 114 | } |
| 115 | return false; |
| 116 | } |
| 117 | |
| 118 | private function f_comp_known(MGCP_ConnHdlr client) |
| 119 | runs on MGCP_Emulation_CT return boolean { |
| 120 | var integer i; |
Harald Welte | 9601c81 | 2018-01-26 18:58:20 +0100 | [diff] [blame] | 121 | for (i := 0; i < sizeof(MgcpEndpointTable); i := i+1) { |
| 122 | if (MgcpEndpointTable[i].comp_ref == client) { |
Harald Welte | bb5a121 | 2018-01-26 10:34:44 +0100 | [diff] [blame] | 123 | return true; |
| 124 | } |
| 125 | } |
| 126 | return false; |
| 127 | } |
| 128 | |
Harald Welte | 9601c81 | 2018-01-26 18:58:20 +0100 | [diff] [blame] | 129 | private function f_comp_by_ep(MgcpEndpoint ep) |
Harald Welte | bb5a121 | 2018-01-26 10:34:44 +0100 | [diff] [blame] | 130 | runs on MGCP_Emulation_CT return MGCP_ConnHdlr { |
| 131 | var integer i; |
Harald Welte | 9601c81 | 2018-01-26 18:58:20 +0100 | [diff] [blame] | 132 | for (i := 0; i < sizeof(MgcpEndpointTable); i := i+1) { |
| 133 | if (MgcpEndpointTable[i].endpoint == ep) { |
| 134 | return MgcpEndpointTable[i].comp_ref; |
Harald Welte | bb5a121 | 2018-01-26 10:34:44 +0100 | [diff] [blame] | 135 | } |
| 136 | } |
Harald Welte | 9601c81 | 2018-01-26 18:58:20 +0100 | [diff] [blame] | 137 | log("MGCP Endpoint Table not found by Endpoint", ep); |
Harald Welte | bb5a121 | 2018-01-26 10:34:44 +0100 | [diff] [blame] | 138 | setverdict(fail); |
| 139 | self.stop; |
| 140 | } |
| 141 | |
Harald Welte | 9601c81 | 2018-01-26 18:58:20 +0100 | [diff] [blame] | 142 | private function f_ep_by_comp(MGCP_ConnHdlr client) |
| 143 | runs on MGCP_Emulation_CT return MgcpEndpoint { |
Harald Welte | bb5a121 | 2018-01-26 10:34:44 +0100 | [diff] [blame] | 144 | var integer i; |
Harald Welte | 9601c81 | 2018-01-26 18:58:20 +0100 | [diff] [blame] | 145 | for (i := 0; i < sizeof(MgcpEndpointTable); i := i+1) { |
| 146 | if (MgcpEndpointTable[i].comp_ref == client) { |
| 147 | return MgcpEndpointTable[i].endpoint; |
Harald Welte | bb5a121 | 2018-01-26 10:34:44 +0100 | [diff] [blame] | 148 | } |
| 149 | } |
Harald Welte | 9601c81 | 2018-01-26 18:58:20 +0100 | [diff] [blame] | 150 | log("MGCP Endpoint Table not found by component ", client); |
Harald Welte | bb5a121 | 2018-01-26 10:34:44 +0100 | [diff] [blame] | 151 | setverdict(fail); |
| 152 | self.stop; |
| 153 | } |
| 154 | |
Harald Welte | 9601c81 | 2018-01-26 18:58:20 +0100 | [diff] [blame] | 155 | private function f_ep_table_add(MGCP_ConnHdlr comp_ref, MgcpEndpoint ep) |
| 156 | runs on MGCP_Emulation_CT { |
| 157 | var integer i; |
| 158 | for (i := 0; i < sizeof(MgcpEndpointTable); i := i+1) { |
| 159 | if (not isvalue(MgcpEndpointTable[i].endpoint)) { |
| 160 | MgcpEndpointTable[i].endpoint := ep; |
| 161 | MgcpEndpointTable[i].comp_ref := comp_ref; |
| 162 | return; |
| 163 | } |
| 164 | } |
| 165 | setverdict(fail, "MGCP Endpoint Table full!"); |
| 166 | self.stop; |
| 167 | } |
| 168 | |
| 169 | private function f_ep_table_del(MGCP_ConnHdlr comp_ref, MgcpEndpoint ep) |
| 170 | runs on MGCP_Emulation_CT { |
| 171 | var integer i; |
| 172 | for (i := 0; i < sizeof(MgcpEndpointTable); i := i+1) { |
| 173 | if (MgcpEndpointTable[i].comp_ref == comp_ref and |
| 174 | MgcpEndpointTable[i].endpoint == ep) { |
| 175 | MgcpEndpointTable[i].endpoint := omit; |
| 176 | MgcpEndpointTable[i].comp_ref := null; |
| 177 | return; |
| 178 | } |
| 179 | } |
| 180 | setverdict(fail, "MGCP Endpoint Table: Couldn't find to-be-deleted entry!"); |
| 181 | self.stop; |
| 182 | } |
| 183 | |
| 184 | |
| 185 | /* Check if the given transaction ID is a pending CRCX. If yes, return true + remove */ |
| 186 | private function f_trans_id_was_pending(MgcpTransId trans_id) |
| 187 | runs on MGCP_Emulation_CT return boolean { |
| 188 | for (var integer i := 0; i < lengthof(MgcpPendingTrans); i := i+1) { |
| 189 | if (MgcpPendingTrans[i] == trans_id) { |
| 190 | /* Remove from list */ |
| 191 | var MgcpTransIds OldPendingTrans := MgcpPendingTrans; |
| 192 | MgcpPendingTrans := {} |
| 193 | for (var integer j := 0; j < lengthof(OldPendingTrans); j := j+1) { |
| 194 | if (j != i) { |
| 195 | MgcpPendingTrans := MgcpPendingTrans & {OldPendingTrans[j]}; |
| 196 | } |
| 197 | } |
| 198 | return true; |
| 199 | } |
| 200 | } |
| 201 | return false; |
| 202 | } |
| 203 | |
Harald Welte | bb5a121 | 2018-01-26 10:34:44 +0100 | [diff] [blame] | 204 | /* TODO: move this to MGCP_Types? */ |
Harald Welte | 9601c81 | 2018-01-26 18:58:20 +0100 | [diff] [blame] | 205 | function f_mgcp_ep(MgcpMessage msg) return MgcpEndpoint { |
Harald Welte | bb5a121 | 2018-01-26 10:34:44 +0100 | [diff] [blame] | 206 | var MgcpParameterList params; |
| 207 | var integer i; |
| 208 | if (ischosen(msg.command)) { |
Harald Welte | 9601c81 | 2018-01-26 18:58:20 +0100 | [diff] [blame] | 209 | return msg.command.line.ep; |
Harald Welte | bb5a121 | 2018-01-26 10:34:44 +0100 | [diff] [blame] | 210 | } else { |
Harald Welte | 9601c81 | 2018-01-26 18:58:20 +0100 | [diff] [blame] | 211 | /* FIXME */ |
| 212 | return "null@none"; |
Harald Welte | bb5a121 | 2018-01-26 10:34:44 +0100 | [diff] [blame] | 213 | } |
Harald Welte | bb5a121 | 2018-01-26 10:34:44 +0100 | [diff] [blame] | 214 | } |
| 215 | |
Harald Welte | 9601c81 | 2018-01-26 18:58:20 +0100 | [diff] [blame] | 216 | private function f_ep_table_init() |
Harald Welte | bb5a121 | 2018-01-26 10:34:44 +0100 | [diff] [blame] | 217 | runs on MGCP_Emulation_CT { |
Harald Welte | 9601c81 | 2018-01-26 18:58:20 +0100 | [diff] [blame] | 218 | for (var integer i := 0; i < sizeof(MgcpEndpointTable); i := i+1) { |
| 219 | MgcpEndpointTable[i].comp_ref := null; |
| 220 | MgcpEndpointTable[i].endpoint := omit; |
Harald Welte | bb5a121 | 2018-01-26 10:34:44 +0100 | [diff] [blame] | 221 | } |
| 222 | } |
| 223 | |
Daniel Willmann | 955627a | 2018-01-17 15:22:32 +0100 | [diff] [blame] | 224 | function main(MGCPOps ops, MGCP_conn_parameters p, charstring id) runs on MGCP_Emulation_CT { |
Daniel Willmann | fa870f5 | 2018-01-17 12:37:14 +0100 | [diff] [blame] | 225 | var Result res; |
| 226 | g_mgcp_id := id; |
Harald Welte | 9601c81 | 2018-01-26 18:58:20 +0100 | [diff] [blame] | 227 | f_ep_table_init(); |
Daniel Willmann | 955627a | 2018-01-17 15:22:32 +0100 | [diff] [blame] | 228 | f_expect_table_init(); |
Daniel Willmann | fa870f5 | 2018-01-17 12:37:14 +0100 | [diff] [blame] | 229 | |
| 230 | map(self:MGCP, system:MGCP_CODEC_PT); |
Harald Welte | bb5a121 | 2018-01-26 10:34:44 +0100 | [diff] [blame] | 231 | if (p.callagent_udp_port == -1) { |
| 232 | res := MGCP_CodecPort_CtrlFunct.f_IPL4_listen(MGCP, p.mgw_ip, p.mgw_udp_port, { udp:={} }); |
| 233 | } else { |
| 234 | res := MGCP_CodecPort_CtrlFunct.f_IPL4_connect(MGCP, p.callagent_ip, p.callagent_udp_port, p.mgw_ip, p.mgw_udp_port, -1, { udp:={} }); |
| 235 | } |
| 236 | |
Daniel Willmann | 166bbb3 | 2018-01-17 15:28:04 +0100 | [diff] [blame] | 237 | g_mgcp_conn_id := res.connId; |
Harald Welte | bb5a121 | 2018-01-26 10:34:44 +0100 | [diff] [blame] | 238 | |
Daniel Willmann | fa870f5 | 2018-01-17 12:37:14 +0100 | [diff] [blame] | 239 | while (true) { |
Daniel Willmann | 166bbb3 | 2018-01-17 15:28:04 +0100 | [diff] [blame] | 240 | var MGCP_ConnHdlr vc_conn; |
| 241 | var ExpectCriteria crit; |
| 242 | var MGCP_RecvFrom mrf; |
| 243 | var MgcpMessage msg; |
| 244 | var MgcpCommand cmd; |
| 245 | var MgcpResponse resp; |
Harald Welte | 9601c81 | 2018-01-26 18:58:20 +0100 | [diff] [blame] | 246 | var MgcpEndpoint ep; |
Daniel Willmann | 166bbb3 | 2018-01-17 15:28:04 +0100 | [diff] [blame] | 247 | |
Daniel Willmann | fa870f5 | 2018-01-17 12:37:14 +0100 | [diff] [blame] | 248 | alt { |
Daniel Willmann | 166bbb3 | 2018-01-17 15:28:04 +0100 | [diff] [blame] | 249 | /* MGCP from client */ |
Harald Welte | bb5a121 | 2018-01-26 10:34:44 +0100 | [diff] [blame] | 250 | [] MGCP_CLIENT.receive(MgcpResponse:?) -> value resp sender vc_conn { |
Harald Welte | 9601c81 | 2018-01-26 18:58:20 +0100 | [diff] [blame] | 251 | msg := { |
| 252 | response := resp |
| 253 | }; |
| 254 | /* If this is the resposne to a pending CRCX, extract Endpoint and store in table */ |
| 255 | if (f_trans_id_was_pending(resp.line.trans_id)) { |
| 256 | f_ep_table_add(vc_conn, f_mgcp_ep(msg)); |
| 257 | } |
Daniel Willmann | 166bbb3 | 2018-01-17 15:28:04 +0100 | [diff] [blame] | 258 | /* Pass message through */ |
Harald Welte | bb5a121 | 2018-01-26 10:34:44 +0100 | [diff] [blame] | 259 | /* TODO: check which ConnectionID client has allocated + store in table? */ |
Daniel Willmann | 166bbb3 | 2018-01-17 15:28:04 +0100 | [diff] [blame] | 260 | MGCP.send(t_MGCP_Send(g_mgcp_conn_id, msg)); |
Daniel Willmann | fa870f5 | 2018-01-17 12:37:14 +0100 | [diff] [blame] | 261 | } |
Daniel Willmann | 166bbb3 | 2018-01-17 15:28:04 +0100 | [diff] [blame] | 262 | [] MGCP.receive(tr_MGCP_RecvFrom_R(?)) -> value mrf { |
Harald Welte | bb5a121 | 2018-01-26 10:34:44 +0100 | [diff] [blame] | 263 | if (p.callagent_udp_port == -1) { |
| 264 | /* we aren't yet connected to the remote side port, let's fix this */ |
| 265 | p.callagent_udp_port := mrf.remPort; |
| 266 | MGCP_CodecPort_CtrlFunct.f_IPL4_connect(MGCP, p.callagent_ip, p.callagent_udp_port, p.mgw_ip, p.mgw_udp_port, g_mgcp_conn_id, { udp:={} }); |
| 267 | } |
Daniel Willmann | 166bbb3 | 2018-01-17 15:28:04 +0100 | [diff] [blame] | 268 | if (ischosen(mrf.msg.command)) { |
| 269 | cmd := mrf.msg.command; |
Harald Welte | 9601c81 | 2018-01-26 18:58:20 +0100 | [diff] [blame] | 270 | if (f_ep_known(cmd.line.ep)) { |
| 271 | vc_conn := f_comp_by_ep(cmd.line.ep); |
Harald Welte | bb5a121 | 2018-01-26 10:34:44 +0100 | [diff] [blame] | 272 | MGCP_CLIENT.send(cmd) to vc_conn; |
| 273 | } else { |
Harald Welte | 9601c81 | 2018-01-26 18:58:20 +0100 | [diff] [blame] | 274 | if (cmd.line.verb == "CRCX") { |
| 275 | vc_conn := ops.create_cb.apply(cmd, id); |
| 276 | if (true /* non-wildcard EP */) { |
| 277 | f_ep_table_add(vc_conn, cmd.line.ep); |
| 278 | } else { |
| 279 | /* add this transaction to list of pending transactions */ |
| 280 | MgcpPendingTrans := MgcpPendingTrans & {cmd.line.trans_id}; |
| 281 | } |
| 282 | MGCP_CLIENT.send(cmd) to vc_conn; |
| 283 | } else { |
| 284 | /* connectionless MGCP, i.e. messages without ConnectionId */ |
| 285 | var template MgcpMessage r := ops.unitdata_cb.apply(mrf.msg); |
| 286 | if (isvalue(r)) { |
| 287 | MGCP.send(t_MGCP_Send(g_mgcp_conn_id, r)); |
| 288 | } |
Harald Welte | bb5a121 | 2018-01-26 10:34:44 +0100 | [diff] [blame] | 289 | } |
| 290 | } |
Daniel Willmann | 166bbb3 | 2018-01-17 15:28:04 +0100 | [diff] [blame] | 291 | } else { |
| 292 | setverdict(fail, "Received unexpected MGCP response: ", mrf.msg.response); |
| 293 | self.stop; |
| 294 | } |
Daniel Willmann | fa870f5 | 2018-01-17 12:37:14 +0100 | [diff] [blame] | 295 | } |
Harald Welte | bb5a121 | 2018-01-26 10:34:44 +0100 | [diff] [blame] | 296 | [] MGCP_PROC.getcall(MGCPEM_register:{?,?}) -> param(crit, vc_conn) { |
Daniel Willmann | 955627a | 2018-01-17 15:22:32 +0100 | [diff] [blame] | 297 | f_create_expect(crit, vc_conn); |
Harald Welte | bb5a121 | 2018-01-26 10:34:44 +0100 | [diff] [blame] | 298 | MGCP_PROC.reply(MGCPEM_register:{crit, vc_conn}); |
Daniel Willmann | 955627a | 2018-01-17 15:22:32 +0100 | [diff] [blame] | 299 | } |
Harald Welte | 9601c81 | 2018-01-26 18:58:20 +0100 | [diff] [blame] | 300 | [] MGCP_PROC.getcall(MGCPEM_delete_ep:{?,?}) -> param(ep, vc_conn) { |
| 301 | f_ep_table_del(vc_conn, ep); |
| 302 | MGCP_PROC.reply(MGCPEM_delete_ep:{ep, vc_conn}); |
| 303 | } |
Daniel Willmann | fa870f5 | 2018-01-17 12:37:14 +0100 | [diff] [blame] | 304 | } |
Harald Welte | 9601c81 | 2018-01-26 18:58:20 +0100 | [diff] [blame] | 305 | |
Daniel Willmann | fa870f5 | 2018-01-17 12:37:14 +0100 | [diff] [blame] | 306 | } |
| 307 | } |
| 308 | |
| 309 | /* "Expect" Handling */ |
| 310 | |
| 311 | /* */ |
Daniel Willmann | 955627a | 2018-01-17 15:22:32 +0100 | [diff] [blame] | 312 | type record ExpectCriteria { |
| 313 | MgcpConnectionId connid optional, |
| 314 | MgcpEndpoint endpoint optional, |
| 315 | MgcpTransId transid optional |
Daniel Willmann | fa870f5 | 2018-01-17 12:37:14 +0100 | [diff] [blame] | 316 | } |
| 317 | |
| 318 | type record ExpectData { |
| 319 | ExpectCriteria crit optional, |
Daniel Willmann | 955627a | 2018-01-17 15:22:32 +0100 | [diff] [blame] | 320 | MGCP_ConnHdlr vc_conn |
Daniel Willmann | fa870f5 | 2018-01-17 12:37:14 +0100 | [diff] [blame] | 321 | } |
| 322 | |
Daniel Willmann | 955627a | 2018-01-17 15:22:32 +0100 | [diff] [blame] | 323 | signature MGCPEM_register(in ExpectCriteria cmd, in MGCP_ConnHdlr hdlr); |
Harald Welte | 9601c81 | 2018-01-26 18:58:20 +0100 | [diff] [blame] | 324 | signature MGCPEM_delete_ep(in MgcpEndpoint ep, in MGCP_ConnHdlr hdlr); |
Daniel Willmann | fa870f5 | 2018-01-17 12:37:14 +0100 | [diff] [blame] | 325 | |
| 326 | type port MGCPEM_PROC_PT procedure { |
Harald Welte | 9601c81 | 2018-01-26 18:58:20 +0100 | [diff] [blame] | 327 | inout MGCPEM_register, MGCPEM_delete_ep; |
Daniel Willmann | fa870f5 | 2018-01-17 12:37:14 +0100 | [diff] [blame] | 328 | } with { extension "internal" }; |
| 329 | |
| 330 | function f_get_mgcp_by_crit(ExpectCriteria crit) |
| 331 | return template MgcpCommand { |
Harald Welte | bb5a121 | 2018-01-26 10:34:44 +0100 | [diff] [blame] | 332 | var template MgcpCommand ret := { |
| 333 | line := { |
| 334 | verb := ?, |
| 335 | trans_id := ?, |
| 336 | ep := ?, |
| 337 | ver := ? |
| 338 | }, |
| 339 | params := *, |
| 340 | sdp := * |
| 341 | } |
| 342 | if (ispresent(crit.connid)) { |
| 343 | ret.params := { *, ts_MgcpParConnectionId(crit.connid), * }; |
| 344 | } |
| 345 | if (ispresent(crit.endpoint)) { |
| 346 | ret.line.ep := crit.endpoint; |
| 347 | } |
| 348 | if (ispresent(crit.transid)) { |
| 349 | ret.line.trans_id := crit.transid; |
| 350 | } |
Daniel Willmann | fa870f5 | 2018-01-17 12:37:14 +0100 | [diff] [blame] | 351 | |
| 352 | return ret; |
| 353 | } |
| 354 | |
| 355 | /* Function that can be used as create_cb and will usse the expect table */ |
| 356 | function ExpectedCreateCallback(MgcpCommand cmd, charstring id) |
| 357 | runs on MGCP_Emulation_CT return MGCP_ConnHdlr { |
| 358 | var MGCP_ConnHdlr ret := null; |
| 359 | var template MgcpCommand mgcpcmd; |
| 360 | var integer i; |
| 361 | |
Harald Welte | bb5a121 | 2018-01-26 10:34:44 +0100 | [diff] [blame] | 362 | for (i := 0; i < sizeof(MgcpExpectTable); i := i+1) { |
| 363 | if (not ispresent(MgcpExpectTable[i].crit)) { |
Daniel Willmann | fa870f5 | 2018-01-17 12:37:14 +0100 | [diff] [blame] | 364 | continue; |
| 365 | } |
Daniel Willmann | 955627a | 2018-01-17 15:22:32 +0100 | [diff] [blame] | 366 | /* FIXME: Ignore criteria for now */ |
Harald Welte | bb5a121 | 2018-01-26 10:34:44 +0100 | [diff] [blame] | 367 | mgcpcmd := f_get_mgcp_by_crit(MgcpExpectTable[i].crit); |
| 368 | if (match(cmd, mgcpcmd)) { |
| 369 | ret := MgcpExpectTable[i].vc_conn; |
Daniel Willmann | fa870f5 | 2018-01-17 12:37:14 +0100 | [diff] [blame] | 370 | /* Release this entry */ |
Harald Welte | bb5a121 | 2018-01-26 10:34:44 +0100 | [diff] [blame] | 371 | MgcpExpectTable[i].crit := omit; |
| 372 | MgcpExpectTable[i].vc_conn := null; |
Daniel Willmann | fa870f5 | 2018-01-17 12:37:14 +0100 | [diff] [blame] | 373 | log("Found Expect[", i, "] for ", cmd, " handled at ", ret); |
| 374 | return ret; |
Harald Welte | bb5a121 | 2018-01-26 10:34:44 +0100 | [diff] [blame] | 375 | } |
Daniel Willmann | fa870f5 | 2018-01-17 12:37:14 +0100 | [diff] [blame] | 376 | } |
| 377 | setverdict(fail, "Couldn't find Expect for CRCX", cmd); |
| 378 | return ret; |
| 379 | } |
| 380 | |
| 381 | private function f_create_expect(ExpectCriteria crit, MGCP_ConnHdlr hdlr) |
| 382 | runs on MGCP_Emulation_CT { |
| 383 | var integer i; |
| 384 | |
| 385 | /* Check an entry like this is not already presnt */ |
Harald Welte | bb5a121 | 2018-01-26 10:34:44 +0100 | [diff] [blame] | 386 | for (i := 0; i < sizeof(MgcpExpectTable); i := i+1) { |
| 387 | if (crit == MgcpExpectTable[i].crit) { |
Daniel Willmann | fa870f5 | 2018-01-17 12:37:14 +0100 | [diff] [blame] | 388 | setverdict(fail, "Crit already present", crit); |
| 389 | self.stop; |
| 390 | } |
| 391 | } |
Harald Welte | bb5a121 | 2018-01-26 10:34:44 +0100 | [diff] [blame] | 392 | for (i := 0; i < sizeof(MgcpExpectTable); i := i+1) { |
| 393 | if (not ispresent(MgcpExpectTable[i].crit)) { |
| 394 | MgcpExpectTable[i].crit := crit; |
| 395 | MgcpExpectTable[i].vc_conn := hdlr; |
Daniel Willmann | fa870f5 | 2018-01-17 12:37:14 +0100 | [diff] [blame] | 396 | log("Created Expect[", i, "] for ", crit, " to be handled at ", hdlr); |
| 397 | return; |
| 398 | } |
| 399 | } |
Harald Welte | bb5a121 | 2018-01-26 10:34:44 +0100 | [diff] [blame] | 400 | setverdict(fail, "No space left in MgcpExpectTable") |
| 401 | } |
| 402 | |
| 403 | /* client/conn_hdlr side function to use procedure port to create expect in emulation */ |
| 404 | function f_create_mgcp_expect(ExpectCriteria dest_number) runs on MGCP_ConnHdlr { |
| 405 | MGCP_PROC.call(MGCPEM_register:{dest_number, self}) { |
| 406 | [] MGCP_PROC.getreply(MGCPEM_register:{?,?}) {}; |
| 407 | } |
Daniel Willmann | fa870f5 | 2018-01-17 12:37:14 +0100 | [diff] [blame] | 408 | } |
| 409 | |
Harald Welte | 9601c81 | 2018-01-26 18:58:20 +0100 | [diff] [blame] | 410 | /* client/conn_hdlr side function to use procedure port to create expect in emulation */ |
| 411 | function f_create_mgcp_delete_ep(MgcpEndpoint ep) runs on MGCP_ConnHdlr { |
| 412 | MGCP_PROC.call(MGCPEM_delete_ep:{ep, self}) { |
| 413 | [] MGCP_PROC.getreply(MGCPEM_delete_ep:{?,?}) {}; |
| 414 | } |
| 415 | } |
| 416 | |
| 417 | |
Daniel Willmann | 955627a | 2018-01-17 15:22:32 +0100 | [diff] [blame] | 418 | private function f_expect_table_init() |
| 419 | runs on MGCP_Emulation_CT { |
| 420 | var integer i; |
Harald Welte | bb5a121 | 2018-01-26 10:34:44 +0100 | [diff] [blame] | 421 | for (i := 0; i < sizeof(MgcpExpectTable); i := i + 1) { |
| 422 | MgcpExpectTable[i].crit := omit; |
Daniel Willmann | 955627a | 2018-01-17 15:22:32 +0100 | [diff] [blame] | 423 | } |
| 424 | } |
| 425 | |
Harald Welte | bb5a121 | 2018-01-26 10:34:44 +0100 | [diff] [blame] | 426 | function DummyUnitdataCallback(MgcpMessage msg) |
| 427 | runs on MGCP_Emulation_CT return template MgcpMessage { |
| 428 | log("Ignoring MGCP ", msg); |
| 429 | return omit; |
| 430 | } |
| 431 | |
| 432 | |
Daniel Willmann | fa870f5 | 2018-01-17 12:37:14 +0100 | [diff] [blame] | 433 | } |