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osmo-ttcn3-hacks
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osmo-ttcn3-hacks/library/GTPv2_Emulation.ttcn

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/* GTPv2 Emulation in TTCN-3
*
* (C) 2018-2020 Harald Welte <laforge@gnumonks.org>
* All rights reserved.
*
* Released under the terms of GNU General Public License, Version 2 or
* (at your option) any later version.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
module GTPv2_Emulation {
import from IPL4asp_Types all;
import from General_Types all;
import from Osmocom_Types all;
import from GTPv2_Types all;
import from GTPv2_Templates all;
import from GTPv2_CodecPort all;
import from GTPv2_CodecPort_CtrlFunct all;
import from UECUPS_Types all;
import from UECUPS_CodecPort all;
import from UECUPS_CodecPort_CtrlFunct all;
/***********************************************************************
* Main Emulation Component
***********************************************************************/
modulepar {
charstring mp_uecups_host := "127.0.0.1";
integer mp_uecups_port := UECUPS_SCTP_PORT;
};
const integer GTP2C_PORT := 2123;
const integer GTP1U_PORT := 2152;
type record Gtp2EmulationCfg {
HostName gtpc_bind_ip,
IPL4asp_Types.PortNumber gtpc_bind_port,
HostName gtpc_remote_ip,
IPL4asp_Types.PortNumber gtpc_remote_port,
//HostName gtpu_bind_ip,
//PortNumber gtpu_bind_port,
boolean sgw_role,
boolean use_gtpu_daemon
};
type component GTPv2_Emulation_CT {
/* Communication with underlying GTP CodecPort */
port GTPv2C_PT GTP2C;
/* Control port to GTP-U Daemon */
port UECUPS_CODEC_PT UECUPS;
/* Communication with Clients */
port GTP2EM_PT TEID0;
port GTP2EM_PT CLIENT;
port GTP2EM_PROC_PT CLIENT_PROC;
/* Configuration by the user */
var Gtp2EmulationCfg g_gtp2_cfg;
/* State */
var GtpPeer g_peer;
var integer g_gtp2c_id;
var OCT1 g_restart_ctr;
var uint16_t g_c_seq_nr;
var TidTableRec TidTable[256];
var SeqTableRec SeqTable[256];
var ImsiTableRec ImsiTable[256];
var PidTableRec PidTable[256];
var integer g_uecups_conn_id;
};
/* local TEID <-> ConnHdlr mapping */
type record TidTableRec {
OCT4 teid,
GTP2_ConnHdlr vc_conn
};
/* local SeqNr <-> ConnHdlr mapping (until a response is received */
type record SeqTableRec {
OCT3 seq,
GTP2_ConnHdlr vc_conn
};
/* IMSI <-> ConnHdlr mapping */
type record ImsiTableRec {
hexstring imsi,
GTP2_ConnHdlr vc_conn
};
/* pid <-> ConnHdlr mapping (for UECUPS process termination indication) */
type record PidTableRec {
/* process ID of the running process */
integer pid,
/* component that started it */
GTP2_ConnHdlr vc_conn
};
private function f_comp_by_teid(OCT4 teid) runs on GTPv2_Emulation_CT return GTP2_ConnHdlr {
var integer i;
for (i := 0; i < sizeof(TidTable); i := i+1) {
if (isbound(TidTable[i].teid) and TidTable[i].teid == teid) {
return TidTable[i].vc_conn;
}
}
setverdict(fail, "No Component for TEID ", teid);
mtc.stop;
}
private function f_seq_known(OCT3 seq) runs on GTPv2_Emulation_CT return boolean {
var integer i;
for (i := 0; i < sizeof(SeqTable); i := i+1) {
if (isbound(SeqTable[i].seq) and SeqTable[i].seq == seq) {
return true;
}
}
return false;
}
private function f_comp_by_seq(OCT3 seq) runs on GTPv2_Emulation_CT return GTP2_ConnHdlr {
var integer i;
for (i := 0; i < sizeof(SeqTable); i := i+1) {
if (isbound(SeqTable[i].seq) and SeqTable[i].seq == seq) {
return SeqTable[i].vc_conn;
}
}
setverdict(fail, "No Component for SEQ ", seq);
mtc.stop;
}
private function f_comp_by_imsi(hexstring imsi) runs on GTPv2_Emulation_CT return GTP2_ConnHdlr {
var integer i;
for (i := 0; i < sizeof(ImsiTable); i := i+1) {
if (isbound(ImsiTable[i].imsi) and ImsiTable[i].imsi == imsi) {
return ImsiTable[i].vc_conn;
}
}
setverdict(fail, "No Component for IMSI ", imsi);
mtc.stop;
}
private function f_comp_by_pid(integer pid) runs on GTPv2_Emulation_CT return GTP2_ConnHdlr {
var integer i;
for (i := 0; i < sizeof(PidTable); i := i+1) {
if (isbound(PidTable[i].pid) and PidTable[i].pid == pid) {
/* fixme: remove */
return PidTable[i].vc_conn;
}
}
setverdict(fail, "No Component for PID ", pid);
mtc.stop;
}
private function f_tid_tbl_add(OCT4 teid, GTP2_ConnHdlr vc_conn) runs on GTPv2_Emulation_CT {
var integer i;
for (i := 0; i < sizeof(TidTable); i := i+1) {
if (not isbound(TidTable[i].teid)) {
TidTable[i].teid := teid;
TidTable[i].vc_conn := vc_conn;
return;
}
}
testcase.stop("No Space in TidTable for ", teid);
}
private function f_seq_tbl_add(OCT3 seq, GTP2_ConnHdlr vc_conn) runs on GTPv2_Emulation_CT {
var integer i;
for (i := 0; i < sizeof(SeqTable); i := i+1) {
if (not isbound(SeqTable[i].seq)) {
SeqTable[i].seq := seq;
SeqTable[i].vc_conn := vc_conn;
return;
}
}
testcase.stop("No Space in SeqTable for ", seq);
}
private function f_seq_tbl_del(OCT3 seq) runs on GTPv2_Emulation_CT {
var integer i;
for (i := 0; i < sizeof(SeqTable); i := i+1) {
if (isbound(SeqTable[i].seq) and SeqTable[i].seq == seq) {
SeqTable[i] := {
seq := -,
vc_conn := null
}
}
}
}
private function f_imsi_tbl_add(hexstring imsi, GTP2_ConnHdlr vc_conn) runs on GTPv2_Emulation_CT {
var integer i;
for (i := 0; i < sizeof(ImsiTable); i := i+1) {
if (not isbound(ImsiTable[i].imsi)) {
ImsiTable[i].imsi := imsi;
ImsiTable[i].vc_conn := vc_conn;
return;
}
}
testcase.stop("No Space in IMSI Table for ", imsi);
}
private function f_pid_tbl_add(integer pid, GTP2_ConnHdlr vc_conn) runs on GTPv2_Emulation_CT {
var integer i;
for (i := 0; i < sizeof(PidTable); i := i+1) {
if (not isbound(PidTable[i].pid)) {
PidTable[i].pid := pid;
PidTable[i].vc_conn := vc_conn;
return;
}
}
testcase.stop("No Space in PID Table for ", pid);
}
/* allocate an unused local teid */
private function f_alloc_teid() runs on GTPv2_Emulation_CT return OCT4 {
var OCT4 teid;
var integer i, j;
for (i := 0; i < 100; i := i+1) {
teid := f_rnd_octstring(4);
for (j := 0; j < sizeof(TidTable); j := j+1) {
if (isbound(TidTable) and TidTable[i].teid == teid) {
continue;
}
}
/* we iterated over all entries and found no match: great! */
return teid;
}
testcase.stop("Cannot find unused TEID after ", i, " attempts");
}
/* obtain the IMSI from a GTPv2C PDU, if there is any IMSI contained. The way how the TITAN
* GTPv2 decoders are structured (explict IE members rather than a list/set of generic IE structures)
* doesn't make this easy, but requires lots of boilerplate code. Oh well.. */
function f_gtp2c_extract_imsi(PDU_GTPCv2 gtp) return template (omit) hexstring {
if (ischosen(gtp.gtpcv2_pdu.createSessionRequest)) {
if (ispresent(gtp.gtpcv2_pdu.createSessionRequest.iMSI)) {
return gtp.gtpcv2_pdu.createSessionRequest.iMSI.iMSI_Value;
}
} else if (ischosen(gtp.gtpcv2_pdu.downlinkDataNotification)) {
if (ispresent(gtp.gtpcv2_pdu.downlinkDataNotification.iMSI)) {
return gtp.gtpcv2_pdu.downlinkDataNotification.iMSI.iMSI_Value;
}
} else if (ischosen(gtp.gtpcv2_pdu.downlinkDataNotificationAcknowledgement)) {
if (ispresent(gtp.gtpcv2_pdu.downlinkDataNotificationAcknowledgement.iMSI)) {
return gtp.gtpcv2_pdu.downlinkDataNotificationAcknowledgement.iMSI.iMSI_Value;
}
} else if (ischosen(gtp.gtpcv2_pdu.downlinkDataNotificationFailureIndication)) {
if (ispresent(gtp.gtpcv2_pdu.downlinkDataNotificationFailureIndication.iMSI)) {
return gtp.gtpcv2_pdu.downlinkDataNotificationFailureIndication.iMSI.iMSI_Value;
}
} else if (ischosen(gtp.gtpcv2_pdu.createIndirectDataForwardingTunnelRequest)) {
if (ispresent(gtp.gtpcv2_pdu.createIndirectDataForwardingTunnelRequest.iMSI)) {
return gtp.gtpcv2_pdu.createIndirectDataForwardingTunnelRequest.iMSI.iMSI_Value;
}
} else if (ischosen(gtp.gtpcv2_pdu.stopPagingIndication)) {
if (ispresent(gtp.gtpcv2_pdu.stopPagingIndication.iMSI)) {
return gtp.gtpcv2_pdu.stopPagingIndication.iMSI.iMSI_Value;
}
} else if (ischosen(gtp.gtpcv2_pdu.forwardRelocationRequest)) {
if (ispresent(gtp.gtpcv2_pdu.forwardRelocationRequest.iMSI)) {
return gtp.gtpcv2_pdu.forwardRelocationRequest.iMSI.iMSI_Value;
}
} else if (ischosen(gtp.gtpcv2_pdu.contextRequest)) {
if (ispresent(gtp.gtpcv2_pdu.contextRequest.iMSI)) {
return gtp.gtpcv2_pdu.contextRequest.iMSI.iMSI_Value;
}
} else if (ischosen(gtp.gtpcv2_pdu.identificationResponse)) {
if (ispresent(gtp.gtpcv2_pdu.identificationResponse.iMSI)) {
return gtp.gtpcv2_pdu.identificationResponse.iMSI.iMSI_Value;
}
} else if (ischosen(gtp.gtpcv2_pdu.changeNotificationRequest)) {
if (ispresent(gtp.gtpcv2_pdu.changeNotificationRequest)) {
return gtp.gtpcv2_pdu.changeNotificationRequest.iMSI.iMSI_Value;
}
} else if (ischosen(gtp.gtpcv2_pdu.changeNotificationResponse)) {
if (ispresent(gtp.gtpcv2_pdu.changeNotificationResponse.iMSI)) {
return gtp.gtpcv2_pdu.changeNotificationResponse.iMSI.iMSI_Value;
}
} else if (ischosen(gtp.gtpcv2_pdu.relocationCancelRequest)) {
if (ispresent(gtp.gtpcv2_pdu.relocationCancelRequest.iMSI)) {
return gtp.gtpcv2_pdu.relocationCancelRequest.iMSI.iMSI_Value;
}
} else if (ischosen(gtp.gtpcv2_pdu.uE_RegistrationQueryRequest)) {
if (ispresent(gtp.gtpcv2_pdu.uE_RegistrationQueryRequest.iMSI)) {
return gtp.gtpcv2_pdu.uE_RegistrationQueryRequest.iMSI.iMSI_Value;
}
} else if (ischosen(gtp.gtpcv2_pdu.uE_RegistrationQueryResponse)) {
if (ispresent(gtp.gtpcv2_pdu.uE_RegistrationQueryResponse.iMSI)) {
return gtp.gtpcv2_pdu.uE_RegistrationQueryResponse.iMSI.iMSI_Value;
}
} else if (ischosen(gtp.gtpcv2_pdu.suspendNotification)) {
if (ispresent(gtp.gtpcv2_pdu.suspendNotification.iMSI)) {
return gtp.gtpcv2_pdu.suspendNotification.iMSI.iMSI_Value;
}
} else if (ischosen(gtp.gtpcv2_pdu.resumeNotification)) {
if (ispresent(gtp.gtpcv2_pdu.resumeNotification.iMSI)) {
return gtp.gtpcv2_pdu.resumeNotification.iMSI.iMSI_Value;
}
} else if (ischosen(gtp.gtpcv2_pdu.cSPagingIndication)) {
if (ispresent(gtp.gtpcv2_pdu.cSPagingIndication.iMSI)) {
return gtp.gtpcv2_pdu.cSPagingIndication.iMSI.iMSI_Value;
}
} else if (ischosen(gtp.gtpcv2_pdu.pGW_DownlinkTriggeringNotification)) {
if (ispresent(gtp.gtpcv2_pdu.pGW_DownlinkTriggeringNotification.iMSI)) {
return gtp.gtpcv2_pdu.pGW_DownlinkTriggeringNotification.iMSI.iMSI_Value;
}
} else if (ischosen(gtp.gtpcv2_pdu.pGW_DownlinkTriggeringAcknowledge)) {
if (ispresent(gtp.gtpcv2_pdu.pGW_DownlinkTriggeringAcknowledge.iMSI)) {
return gtp.gtpcv2_pdu.pGW_DownlinkTriggeringAcknowledge.iMSI.iMSI_Value;
}
} else if (ischosen(gtp.gtpcv2_pdu.traceSessionActivation)) {
if (ispresent(gtp.gtpcv2_pdu.traceSessionActivation.iMSI)) {
return gtp.gtpcv2_pdu.traceSessionActivation.iMSI.iMSI_Value;
}
}
return omit;
}
private template (value) SctpTuple ts_SCTP(template (omit) integer ppid := omit) := {
sinfo_stream := omit,
sinfo_ppid := ppid,
remSocks := omit,
assocId := omit
};
function tr_UECUPS_RecvFrom_R(template PDU_UECUPS msg)
runs on GTPv2_Emulation_CT return template UECUPS_RecvFrom {
var template UECUPS_RecvFrom mrf := {
connId := g_uecups_conn_id,
remName := ?,
remPort := ?,
locName := ?,
locPort := ?,
msg := msg
}
return mrf;
}
private template PortEvent tr_SctpAssocChange := {
sctpEvent := {
sctpAssocChange := ?
}
}
private template PortEvent tr_SctpPeerAddrChange := {
sctpEvent := {
sctpPeerAddrChange := ?
}
}
private function f_uecups_xceive(template (value) PDU_UECUPS tx,
template PDU_UECUPS rx_t := ?)
runs on GTPv2_Emulation_CT return PDU_UECUPS {
timer T := 10.0;
var UECUPS_RecvFrom mrf;
UECUPS.send(t_UECUPS_Send(g_uecups_conn_id, tx));
alt {
[] UECUPS.receive(tr_UECUPS_RecvFrom_R(rx_t)) -> value mrf { }
[] UECUPS.receive(tr_SctpAssocChange) { repeat; }
[] UECUPS.receive(tr_SctpPeerAddrChange) { repeat; }
[] T.timeout {
setverdict(fail, "Timeout waiting for ", rx_t);
mtc.stop;
}
}
return mrf.msg;
}
private function f_init(Gtp2EmulationCfg cfg) runs on GTPv2_Emulation_CT {
var Result res;
map(self:GTP2C, system:GTP2C);
res := GTPv2_CodecPort_CtrlFunct.f_IPL4_listen(GTP2C, cfg.gtpc_bind_ip,
cfg.gtpc_bind_port, {udp:={}});
g_gtp2c_id := res.connId;
g_restart_ctr := f_rnd_octstring(1);
g_c_seq_nr := f_rnd_int(65535);
g_gtp2_cfg := cfg;
g_peer := {
connId := g_gtp2c_id,
remName := g_gtp2_cfg.gtpc_remote_ip,
remPort := g_gtp2_cfg.gtpc_remote_port
}
if (g_gtp2_cfg.use_gtpu_daemon) {
map(self:UECUPS, system:UECUPS);
res := UECUPS_CodecPort_CtrlFunct.f_IPL4_connect(UECUPS, mp_uecups_host, mp_uecups_port, "", -1, -1, { sctp := valueof(ts_SCTP) });
if (not ispresent(res.connId)) {
setverdict(fail, "Could not connect UECUPS socket, check your configuration");
testcase.stop;
}
g_uecups_conn_id := res.connId;
/* clear all tunnel state in the daemon at start */
f_uecups_xceive({reset_all_state := {}}, {reset_all_state_res:=?});
}
/* make sure we always pass incoming UECUPS indications whenever receiving fom the UECUPS port */
activate(as_uecups_ind());
}
private altstep as_uecups_ind() runs on GTPv2_Emulation_CT {
var UECUPS_RecvFrom rx;
var GTP2_ConnHdlr vc_conn;
/* handle incoming program_term_ind; dispatch to whatever component started the process */
[] UECUPS.receive(tr_UECUPS_RecvFrom_R({program_term_ind:=?})) -> value rx {
vc_conn := f_comp_by_pid(rx.msg.program_term_ind.pid);
CLIENT.send(rx.msg.program_term_ind) to vc_conn;
/* FIXME: remove from table */
repeat;
}
}
function main(Gtp2EmulationCfg cfg) runs on GTPv2_Emulation_CT {
var Gtp2cUnitdata g2c_ud;
var PDU_GTPCv2 g2c;
var GTP2_ConnHdlr vc_conn;
var hexstring imsi;
var OCT4 teid;
var PDU_UECUPS rx_uecups;
var UECUPS_CreateTun gtc;
var UECUPS_DestroyTun gtd;
var UECUPS_StartProgram sprog;
f_init(cfg);
while (true) {
alt {
/* route inbound GTP2-C based on TEID, SEQ or IMSI */
[] GTP2C.receive(Gtp2cUnitdata:?) -> value g2c_ud {
var template hexstring imsi_t := f_gtp2c_extract_imsi(g2c_ud.gtpc);
if (not ispresent(g2c_ud.gtpc.tEID) or g2c_ud.gtpc.tEID == int2oct(0, 4)) {
/* if this is a response, route by SEQ */
if (match(g2c_ud.gtpc, tr_PDU_GTP2C_msgtypes(gtp2_responses))
and f_seq_known(g2c_ud.gtpc.sequenceNumber)) {
vc_conn := f_comp_by_seq(g2c_ud.gtpc.sequenceNumber);
CLIENT.send(g2c_ud.gtpc) to vc_conn;
} else {
TEID0.send(g2c_ud.gtpc);
}
} else if (ispresent(g2c_ud.gtpc.tEID) and g2c_ud.gtpc.tEID != int2oct(0, 4)) {
vc_conn := f_comp_by_teid(g2c_ud.gtpc.tEID);
CLIENT.send(g2c_ud.gtpc) to vc_conn;
} else if (isvalue(imsi_t)) {
vc_conn := f_comp_by_imsi(valueof(imsi_t));
CLIENT.send(g2c_ud.gtpc) to vc_conn;
} else {
/* Send to all clients */
var integer i;
for (i := 0; i < sizeof(TidTable); i := i+1) {
if (isbound(TidTable[i].teid) and TidTable[i].teid == teid) {
CLIENT.send(g2c_ud.gtpc) to TidTable[i].vc_conn;
}
}
}
/* remove sequence number if response was received */
if (match(g2c_ud.gtpc, tr_PDU_GTP2C_msgtypes(gtp2_responses))) {
f_seq_tbl_del(g2c_ud.gtpc.sequenceNumber);
}
}
[] TEID0.receive(PDU_GTPCv2:?) -> value g2c sender vc_conn {
/* patch in the next sequence number */
/* FIXME: do this only for outbound requests */
g2c.sequenceNumber := int2oct(g_c_seq_nr, 3);
g_c_seq_nr := g_c_seq_nr + 1;
/* build Gtp2cUnitdata */
g2c_ud := { peer := g_peer, gtpc := g2c };
GTP2C.send(g2c_ud);
if (match(g2c, tr_PDU_GTP2C_msgtypes(gtp2_requests))) {
f_seq_tbl_add(g2c.sequenceNumber, vc_conn);
}
}
[] CLIENT.receive(PDU_GTPCv2:?) -> value g2c sender vc_conn {
/* patch in the next sequence number */
/* FIXME: do this only for outbound requests */
g2c.sequenceNumber := int2oct(g_c_seq_nr, 3);
g_c_seq_nr := g_c_seq_nr + 1;
/* build Gtp2cUnitdata */
g2c_ud := { peer := g_peer, gtpc := g2c };
GTP2C.send(g2c_ud);
if (match(g2c, tr_PDU_GTP2C_msgtypes(gtp2_requests))) {
f_seq_tbl_add(g2c.sequenceNumber, vc_conn);
}
}
[] CLIENT_PROC.getcall(GTP2EM_register_imsi:{?}) -> param(imsi) sender vc_conn {
f_imsi_tbl_add(imsi, vc_conn);
CLIENT_PROC.reply(GTP2EM_register_imsi:{imsi}) to vc_conn;
}
[] CLIENT_PROC.getcall(GTP2EM_register_teid:{?}) -> param(teid) sender vc_conn {
f_tid_tbl_add(teid, vc_conn);
CLIENT_PROC.reply(GTP2EM_register_teid:{teid}) to vc_conn;
}
[] CLIENT_PROC.getcall(GTP2EM_allocate_teid:{}) -> sender vc_conn {
var OCT4 t := f_alloc_teid();
f_tid_tbl_add(t, vc_conn);
CLIENT_PROC.reply(GTP2EM_allocate_teid:{} value t) to vc_conn;
}
[] CLIENT_PROC.getcall(GTP2EM_create_tunnel:{?}) -> param(gtc) sender vc_conn {
rx_uecups := f_uecups_xceive({create_tun := gtc}, {create_tun_res:={result:=OK}});
CLIENT_PROC.reply(GTP2EM_create_tunnel:{gtc}) to vc_conn;
}
[] CLIENT_PROC.getcall(GTP2EM_destroy_tunnel:{?}) -> param(gtd) sender vc_conn {
rx_uecups := f_uecups_xceive({destroy_tun := gtd}, {destroy_tun_res:={result:=OK}});
CLIENT_PROC.reply(GTP2EM_destroy_tunnel:{gtd}) to vc_conn;
}
[] CLIENT_PROC.getcall(GTP2EM_start_program:{?}) -> param(sprog) sender vc_conn {
rx_uecups := f_uecups_xceive({start_program := sprog}, {start_program_res:=?});
/* if successful: store (pid, vc_conn) tuple so we can route program_term_ind */
if (rx_uecups.start_program_res.result == OK) {
f_pid_tbl_add(rx_uecups.start_program_res.pid, vc_conn);
}
CLIENT_PROC.reply(GTP2EM_start_program:{sprog} value rx_uecups.start_program_res) to vc_conn;
}
}
}
}
/***********************************************************************
* Interaction between Main and Client Components
***********************************************************************/
type port GTP2EM_PT message {
inout PDU_GTPCv2, UECUPS_ProgramTermInd;
} with { extension "internal" };
signature GTP2EM_register_imsi(hexstring imsi);
signature GTP2EM_register_teid(OCT4 teid);
signature GTP2EM_allocate_teid() return OCT4;
signature GTP2EM_create_tunnel(UECUPS_CreateTun gtc);
signature GTP2EM_destroy_tunnel(UECUPS_DestroyTun gtd);
signature GTP2EM_start_program(UECUPS_StartProgram sprog) return UECUPS_StartProgramRes;
type port GTP2EM_PROC_PT procedure {
inout GTP2EM_register_imsi, GTP2EM_register_teid, GTP2EM_allocate_teid,
GTP2EM_create_tunnel, GTP2EM_destroy_tunnel, GTP2EM_start_program;
} with { extension "internal" };
/***********************************************************************
* Client Component
***********************************************************************/
type component GTP2_ConnHdlr {
port GTP2EM_PT GTP2;
port GTP2EM_PROC_PT GTP2_PROC;
};
function f_gtp2_register_imsi(hexstring imsi) runs on GTP2_ConnHdlr {
GTP2_PROC.call(GTP2EM_register_imsi:{imsi}) {
[] GTP2_PROC.getreply(GTP2EM_register_imsi:{imsi});
}
}
function f_gtp2_register_teid(OCT4 teid) runs on GTP2_ConnHdlr {
GTP2_PROC.call(GTP2EM_register_teid:{teid}) {
[] GTP2_PROC.getreply(GTP2EM_register_teid:{teid});
}
}
function f_gtp2_allocate_teid() runs on GTP2_ConnHdlr return OCT4 {
var OCT4 t;
GTP2_PROC.call(GTP2EM_allocate_teid:{}) {
[] GTP2_PROC.getreply(GTP2EM_allocate_teid:{}) -> value t {
return t;
}
}
}
function f_gtp2_create_tunnel(template (value) UECUPS_CreateTun gtc)
runs on GTP2_ConnHdlr {
GTP2_PROC.call(GTP2EM_create_tunnel:{valueof(gtc)}) {
[] GTP2_PROC.getreply(GTP2EM_create_tunnel:{gtc});
}
}
function f_gtp2_destroy_tunnel(template (value) UECUPS_DestroyTun gtd)
runs on GTP2_ConnHdlr {
GTP2_PROC.call(GTP2EM_destroy_tunnel:{valueof(gtd)}) {
[] GTP2_PROC.getreply(GTP2EM_destroy_tunnel:{gtd});
}
}
function f_gtp2_start_program(template (value) UECUPS_StartProgram sprog)
runs on GTP2_ConnHdlr return UECUPS_StartProgramRes {
var UECUPS_StartProgramRes res;
GTP2_PROC.call(GTP2EM_start_program:{valueof(sprog)}) {
[] GTP2_PROC.getreply(GTP2EM_start_program:{sprog}) -> value res;
}
return res;
}
}
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