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osmo-ttcn3-hacks/ggsn_tests/GGSN_Tests.ttcn

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module GGSN_Tests {
/* GGSN test suite in TTCN-3
* (C) 2017-2019 Harald Welte <laforge@gnumonks.org>
* (C) 2018-2019 sysmocom - s.f.m.c. GmbH
* 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
*/
import from TCCEncoding_Functions all;
import from General_Types all;
import from Osmocom_Types all;
import from Misc_Helpers all;
import from IPL4asp_PortType all;
import from IPL4asp_Types all;
import from GTP_CodecPort all;
import from GTP_CodecPort_CtrlFunct all;
import from GTP_Templates all;
import from GTPC_Types all;
import from GTPU_Types all;
import from IPCP_Types all;
import from PAP_Types all;
import from IP_Types all;
import from ICMP_Types all;
import from ICMPv6_Types all;
import from Native_Functions all;
import from Osmocom_VTY_Functions all;
import from TELNETasp_PortType all;
import from DIAMETER_Types all;
import from DIAMETER_Templates all;
import from DIAMETER_Emulation all;
const integer GTP0_PORT := 3386;
const integer GTP1C_PORT := 2123;
const integer GTP1U_PORT := 2152;
const integer PCRF_PORT := 3868;
const integer OCS_PORT := 3869;
type enumerated GGSN_Impl {
GGSN_IMPL_OSMOCOM,
GGSN_IMPL_OPEN5GS
};
modulepar {
/* Default IP addresses. May be overridden by GGSN_Tests configuration files. */
/* The SGSN simulated by TTCN3 will bind to these addresses for GTP control and GTP user planes. */
charstring m_bind_ip_gtpc := "127.23.42.1";
charstring m_bind_ip_gtpu := "127.23.42.1";
/* Addresses the GGSN which is being tested is listening on for SGSN connections. */
charstring m_ggsn_ip_gtpc := "127.0.0.6";
charstring m_ggsn_ip_gtpu := "127.0.0.6";
/*
* Our tests expect to see these DNS servers in 'Create PDP context responses' sent by the GGSN.
* These addresses must therefore match 'ip[v6] dns' options configured in osmo-ggsn.conf.
*
* These addresses are not expected to serve actual DNS requests. However, tests may expect to be
* able to ping these addresses (currently, IPv4 addresses must respond with an ICMP 'echo reply',
* and IPv6 addresses may respond with either ICMPv6 'echo reply' or 'destination unreachable').
*/
charstring m_ggsn_ip4_dns1 := "192.168.100.1"
charstring m_ggsn_ip4_dns2 := "8.8.8.8"
charstring m_ggsn_ip6_dns1 := "2001:4860:4860::8888"
charstring m_ggsn_ip6_dns2 := "2001:4860:4860::8844"
/*
* Additional address ranges are defined in osmo-ggsn.conf from which addresses are assigned
* to MS "behind" the simulated SGSN. These addresses appear on tun devices used by osmo-ggsn.
* The tests expect to be able to send ping packets between any two simulated MS within the same
* address range. This requires IP forwarding to be enabled on the corresponding tun interfaces.
*/
GGSN_Impl m_ggsn_impl := GGSN_IMPL_OSMOCOM;
}
type set PdpContext {
hexstring imsi,
octetstring msisdn optional,
octetstring apn,
ProtConfigOptions pco_req optional,
ProtConfigOptions pco_neg optional,
EndUserAddress eua,
OCT16 ip6_prefix optional,
BIT4 nsapi,
/* TEI (Data) local side */
OCT4 teid,
/* TEI (Control) local side */
OCT4 teic,
/* TEI (Data) remote side */
OCT4 teid_remote,
/* TEI (Control) remote side */
OCT4 teic_remote,
OCT1 ratType optional,
UserLocationInformation uli optional,
OCT2 charging_char optional,
OCT8 imeisv optional,
MS_TimeZone ms_tz optional
}
type component GT_CT {
port GTPC_PT GTPC;
port GTPU_PT GTPU;
var boolean g_initialized := false;
var OCT1 g_restart_ctr := '01'O;
/* FIXME: unify with g_bind_ip + parse from config file */
var OCT4 g_sgsn_ip_c;
var OCT4 g_sgsn_ip_u;
/* FIXME: parse remName from config file */
var GtpPeer g_peer_c := { connId := 0, remName := m_ggsn_ip_gtpc, remPort := GTP1C_PORT };
var GtpPeer g_peer_u := { connId := 0, remName := m_ggsn_ip_gtpu, remPort := GTP1U_PORT };
timer T_default := 3.0;
/* next to-be-sent GTP-C sequence number */
var uint16_t g_c_seq_nr;
/* next to-be-sent GTP-U sequence number */
var uint16_t g_d_seq_nr;
port TELNETasp_PT GGSNVTY;
var boolean use_gtpu_txseq := false;
var integer g_use_echo_intval := 0; /* 0 = disabled */
/* Emulated PCRF, used with m_ggsn_impl = GGSN_IMPL_OPEN5GS */
var DIAMETER_conn_parameters g_gx_pars;
var DIAMETER_Emulation_CT vc_Gx;
port DIAMETER_PT Gx_UNIT;
port DIAMETEREM_PROC_PT Gx_PROC;
/* Emulated OCS, used with m_ggsn_impl = GGSN_IMPL_OPEN5GS */
var DIAMETER_conn_parameters g_gy_pars;
var DIAMETER_Emulation_CT vc_Gy;
port DIAMETER_PT Gy_UNIT;
port DIAMETEREM_PROC_PT Gy_PROC;
var integer g_gy_validity_time := 0; /* In seconds. 0 => disabled, !0 => grant over CC-Time period */
var integer g_gy_volume_threshold := 0; /* In octets. 0 => disabled, !0 => request IUT to revalidate after N octets */
var PDU_DIAMETER g_rx_gy; /* Store last received Gy message */
}
private function f_init_vty() runs on GT_CT {
map(self:GGSNVTY, system:GGSNVTY);
f_vty_set_prompts(GGSNVTY);
f_vty_transceive(GGSNVTY, "enable");
}
private function f_vty_set_gpdu_txseq(boolean enable) runs on GT_CT {
f_vty_enter_config(GGSNVTY);
f_vty_transceive(GGSNVTY, "ggsn ggsn0");
f_vty_transceive(GGSNVTY, "apn internet");
if (enable) {
f_vty_transceive(GGSNVTY, "g-pdu tx-sequence-numbers");
} else {
f_vty_transceive(GGSNVTY, "no g-pdu tx-sequence-numbers");
}
f_vty_transceive(GGSNVTY, "exit");
f_vty_transceive(GGSNVTY, "apn inet6");
if (enable) {
f_vty_transceive(GGSNVTY, "g-pdu tx-sequence-numbers");
} else {
f_vty_transceive(GGSNVTY, "no g-pdu tx-sequence-numbers");
}
f_vty_transceive(GGSNVTY, "exit");
f_vty_transceive(GGSNVTY, "apn inet46");
if (enable) {
f_vty_transceive(GGSNVTY, "g-pdu tx-sequence-numbers");
} else {
f_vty_transceive(GGSNVTY, "no g-pdu tx-sequence-numbers");
}
f_vty_transceive(GGSNVTY, "end");
}
private function f_verify_gtpu_txseq(in PDU_GTPU gtpu, in boolean expect_gptu_txseq) return boolean {
if (expect_gptu_txseq) {
if (gtpu.s_bit != '1'B) {
log("GTPU sequence number expected but not present")
return false;
}
} else {
if (gtpu.s_bit != '0'B) {
log("GTPU sequence number not expected but present")
return false;
}
}
return true;
}
private function f_vty_enable_echo_interval(integer intval_sec) runs on GT_CT {
f_vty_enter_config(GGSNVTY);
f_vty_transceive(GGSNVTY, "ggsn ggsn0");
if (intval_sec > 0) {
f_vty_transceive(GGSNVTY, "echo-interval " & int2str(intval_sec));
} else {
f_vty_transceive(GGSNVTY, "no echo-interval");
}
f_vty_transceive(GGSNVTY, "end");
}
private function DiameterForwardUnitdataCallback(PDU_DIAMETER msg)
runs on DIAMETER_Emulation_CT return template PDU_DIAMETER {
DIAMETER_UNIT.send(msg);
return omit;
}
private function f_init_diameter(charstring id) runs on GT_CT {
var DIAMETEROps ops := {
create_cb := refers(DIAMETER_Emulation.ExpectedCreateCallback),
unitdata_cb := refers(DiameterForwardUnitdataCallback),
raw := true /* handler mode (single component for all IMSI)) */
};
/* Gx setup: */
g_gx_pars := {
remote_ip := m_ggsn_ip_gtpc,
remote_sctp_port := -1,
local_ip := m_bind_ip_gtpc,
local_sctp_port := PCRF_PORT,
origin_host := "pcrf.localdomain",
origin_realm := "localdomain",
auth_app_id := omit,
vendor_app_id := c_DIAMETER_3GPP_Gx_AID
};
vc_Gx := DIAMETER_Emulation_CT.create(id);
map(vc_Gx:DIAMETER, system:DIAMETER_CODEC_PT);
connect(vc_Gx:DIAMETER_UNIT, self:Gx_UNIT);
connect(vc_Gx:DIAMETER_PROC, self:Gx_PROC);
vc_Gx.start(DIAMETER_Emulation.main(ops, g_gx_pars, id));
/* Gy setup: */
g_gy_pars := {
remote_ip := m_ggsn_ip_gtpc,
remote_sctp_port := -1,
local_ip := m_bind_ip_gtpc,
local_sctp_port := OCS_PORT,
origin_host := "ocs.localdomain",
origin_realm := "localdomain",
auth_app_id := c_DIAMETER_CREDIT_CONTROL_AID,
vendor_app_id := omit
};
vc_Gy := DIAMETER_Emulation_CT.create(id);
map(vc_Gy:DIAMETER, system:DIAMETER_CODEC_PT);
connect(vc_Gy:DIAMETER_UNIT, self:Gy_UNIT);
connect(vc_Gy:DIAMETER_PROC, self:Gy_PROC);
vc_Gy.start(DIAMETER_Emulation.main(ops, g_gy_pars, id));
f_diameter_wait_capability(Gx_UNIT);
f_diameter_wait_capability(Gy_UNIT);
/* Give some time for our emulation to get out of SUSPECT list of SUT (3 watchdong ping-pongs):
* RFC6733 sec 5.1
* RFC3539 sec 3.4.1 [5]
* https://github.com/freeDiameter/freeDiameter/blob/master/libfdcore/p_psm.c#L49
*/
f_sleep(1.0);
}
function f_init() runs on GT_CT {
if (g_initialized == true) {
return;
}
g_initialized := true;
g_sgsn_ip_c := f_inet_addr(m_bind_ip_gtpc);
g_sgsn_ip_u := f_inet_addr(m_bind_ip_gtpu);
var Result res;
map(self:GTPC, system:GTPC);
res := GTP_CodecPort_CtrlFunct.f_IPL4_listen(GTPC, m_bind_ip_gtpc, GTP1C_PORT, {udp:={}});
log("GTP1C ConnectionID: ", res.connId);
g_peer_c.connId := res.connId;
map(self:GTPU, system:GTPU);
res := GTP_CodecPort_CtrlFunct.f_GTPU_listen(GTPU, m_bind_ip_gtpu, GTP1U_PORT, {udp:={}});
g_peer_u.connId:= res.connId;
g_restart_ctr := f_rnd_octstring(1);
g_c_seq_nr := f_rnd_int(65535);
g_d_seq_nr := f_rnd_int(65535);
if (m_ggsn_impl == GGSN_IMPL_OSMOCOM) {
f_init_vty();
f_vty_set_gpdu_txseq(use_gtpu_txseq);
f_vty_enable_echo_interval(g_use_echo_intval);
} else if (m_ggsn_impl == GGSN_IMPL_OPEN5GS) {
f_init_diameter(testcasename());
}
}
function f_shutdown_helper() runs on GT_CT {
/* Sleep N3_REQUESTS * T3_REQUEST seconds, nowadays 5*3=15s.
* This ensures all retransmit queues are cleared before jumping
* into next tests, hence avoding situation where a test resuses
* a seqnum still in the GGSN's resp queue (dup req detector).
* See OS#5485 avout decreasing time. We could also add a new
* VTY command that calls gtp_clear_queues() */
f_sleep(15.0);
setverdict(pass);
}
/* Altstep implementing responses to any incoming echo requests */
private altstep pingpong() runs on GT_CT {
var Gtp1cUnitdata ud;
var Gtp1uUnitdata udu;
[g_use_echo_intval > 0] GTPC.receive(tr_GTPC_PING(?)) -> value ud {
var uint16_t seq := oct2int(ud.gtpc.opt_part.sequenceNumber);
GTPC.send(ts_GTPC_PONG(ud.peer, seq, g_restart_ctr));
repeat;
};
[g_use_echo_intval == 0] GTPC.receive(tr_GTPC_PING(?)) {
Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail,
"GTP Echo Req rceived but not enabled in VTY");
};
[] T_default.timeout {
Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail,
"pinpong T_default timeout");
};
}
/* 'internet' in DNS encoding */
const octetstring c_ApnInternet := '08696E7465726E6574'O;
const octetstring c_ApnInet6 := '05696E657436'O;
const octetstring c_ApnInet46 := '06696E65743436'O;
/* return random NSAPI */
function f_rnd_nsapi() return BIT4 {
return int2bit(f_rnd_int(16), 4);
}
/* return random TEI[DC] */
function f_rnd_tei() return OCT4 {
return int2oct(f_rnd_int(4294967296), 4);
}
/* return random IMEI(SV) */
function f_rnd_imeisv() return OCT8 {
return hex2oct(f_rnd_hexstring(16, 10));
}
/* define an (internal) representation of a PDP context */
template PdpContext t_DefinePDP(hexstring imsi, charstring msisdn, octetstring apn,
EndUserAddress eua, OCT1 ratType := '02'O /* GERAN */) := {
imsi := imsi,
msisdn := '11'O & f_enc_TBCD(msisdn), /* encoded as TS 29.060 7.7.33, TS 29.002 */
nsapi := f_rnd_nsapi(),
apn := apn,
pco_req := omit,
eua := eua,
teid := f_rnd_tei(),
teic := f_rnd_tei(),
ratType := ratType,
uli := {
type_gtpc := '98'O,
lengthf := 0 /* filled in by encoder */,
geographicLocationType := '00'O /* CGI */,
geographicLocation := {
geographicLocationCGI := ts_GeographicLocationCGI('262'H, '42F'H, '0001'O, '0002'O)
}
},
charging_char := '0000'O,
imeisv := f_rnd_imeisv(),
ms_tz := f_ts_MS_TimeZone('03'O, '01'B)
}
/* send GTP-C for a given context and increment sequence number */
function f_send_gtpc(in template Gtp1cUnitdata data) runs on GT_CT {
GTPC.send(data);
g_c_seq_nr := (g_c_seq_nr + 1) mod 65536;
}
/* send GTP-U for a given context and increment sequence number */
function f_send_gtpu(inout PdpContext ctx, in octetstring data) runs on GT_CT {
if (use_gtpu_txseq) {
GTPU.send(ts_GTP1U_GPDU(g_peer_u, g_d_seq_nr, ctx.teid_remote, data));
g_d_seq_nr := (g_d_seq_nr + 1) mod 65536;
} else {
GTPU.send(ts_GTP1U_GPDU(g_peer_u, omit, ctx.teid_remote, data));
}
}
function f_handle_create_req(inout PdpContext ctx, in Gtp1cUnitdata ud, in template OCT1 exp_cause := '80'O) runs on GT_CT {
var CreatePDPContextResponse cpr := ud.gtpc.gtpc_pdu.createPDPContextResponse;
if (not match(cpr.cause.causevalue, exp_cause)) {
Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail,
"CreatePDPContextResp: cause expectancies didn't match");
}
if (cpr.cause.causevalue == '80'O) { /* Accepted */
/* Check if EUA type corresponds to requested type */
if (match(ctx.eua, t_EuaIPv4(?)) and
not match(cpr.endUserAddress, tr_EuaIPv4(?))){
Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail,
"EUAv4 expectancies didn't match");
}
if (match(ctx.eua, t_EuaIPv6(?)) and
not match(cpr.endUserAddress, tr_EuaIPv6(?))) {
Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail,
"EUAv6 expectancies didn't match");
}
if (match(ctx.eua, t_EuaIPv4v6(?, ?)) and
not match(cpr.endUserAddress, tr_EuaIPv4v6(?, ?))) {
Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail,
"EUAv4v6 expectancies didn't match");
}
} else if (cpr.cause.causevalue == '81'O) { /* Cause: New PDP type due to network preference */
/* ETSI TS 129 060 7.3.2 Create PDP Context Response. OS#5449 */
/* This should only happen if EUA requested type is v4v6: */
if (not ischosen(ctx.eua.endUserAddress.endUserAddressIPv4andIPv6)) {
Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail,
"Cause not expected when requesting a non v4v6 EUA");
}
if (not match(cpr.endUserAddress, (tr_EuaIPv4(?), tr_EuaIPv6(?)))) {
Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail,
"Cause not expected when requesting+receiving EUAv4v6");
}
} else {
if (ispresent(cpr.endUserAddress)) {
Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail,
"EUA received on createPDPContextResponse cause=" & oct2str(cpr.cause.causevalue));
}
setverdict(pass);
return;
}
/* Check if PCO response corresponds to request */
if (ispresent(ctx.pco_req)) {
if (match(ctx.pco_req, ts_PCO_IPv4_DNS_CONT) and
not match(cpr.protConfigOptions, tr_PCO_IPv4_DNS_CONT_resp(?))) {
Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail,
"IPv4 DNS Container requested, but missing");
}
if (match(ctx.pco_req, ts_PCO_IPv6_DNS) and
not match(cpr.protConfigOptions, tr_PCO_IPv6_DNS_resp(?))) {
Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail,
"IPv6 DNS Container requested, but missing");
}
}
ctx.teid_remote := cpr.teidDataI.teidDataI;
ctx.teic_remote := cpr.teidControlPlane.teidControlPlane;
ctx.eua := cpr.endUserAddress;
ctx.pco_neg := cpr.protConfigOptions;
setverdict(pass);
}
function f_handle_update_req(inout PdpContext ctx, in Gtp1cUnitdata ud, in OCT1 exp_cause := '80'O) runs on GT_CT {
var UpdatePDPContextResponseGGSN upr := ud.gtpc.gtpc_pdu.updatePDPContextResponse.updatePDPContextResponseGGSN;
if (exp_cause == '80'O and exp_cause == upr.cause.causevalue) {
ctx.teid_remote := upr.teidDataI.teidDataI;
ctx.teic_remote := upr.teidControlPlane.teidControlPlane;
if (ispresent(upr.protConfigOptions)) {
ctx.pco_neg := upr.protConfigOptions;
}
setverdict(pass);
} else if (exp_cause != '80'O and exp_cause == upr.cause.causevalue) {
setverdict(pass);
} else {
Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail,
"UpdatePDPContextResp: cause expectancies didn't match");
}
}
private altstep as_DIA_Gx_CCR(DCC_NONE_CC_Request_Type req_type) runs on GT_CT {
var PDU_DIAMETER rx_dia;
[] Gx_UNIT.receive(tr_DIA_Gx_CCR(req_type := req_type)) -> value rx_dia {
var template (omit) AVP avp;
var octetstring sess_id;
var AVP_Unsigned32 req_num;
avp := f_DIAMETER_get_avp(rx_dia, c_AVP_Code_BASE_NONE_Session_Id);
sess_id := valueof(avp.avp_data.avp_BASE_NONE_Session_Id);
avp := f_DIAMETER_get_avp(rx_dia, c_AVP_Code_DCC_NONE_CC_Request_Number);
req_num := valueof(avp.avp_data.avp_DCC_NONE_CC_Request_Number);
Gx_UNIT.send(ts_DIA_Gx_CCA(rx_dia.hop_by_hop_id, rx_dia.end_to_end_id, sess_id,
req_type, req_num));
}
[] Gx_UNIT.receive(PDU_DIAMETER:?) -> value rx_dia {
Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail,
log2str("Received unexpected DIAMETER ", rx_dia));
}
}
private function f_tr_DIA_Gy_CCR(template (omit) PdpContext ctx, DCC_NONE_CC_Request_Type req_type)
runs on GT_CT return template (present) PDU_DIAMETER
{
var template (present) PDU_DIAMETER tpl;
var charstring smf_origin_host := "smf.localdomain";
var template (present) octetstring imsi := ?;
var template (present) octetstring msisdn := ?;
var template (present) octetstring imeisv := ?;
var template (present) octetstring rat_type := ?;
var template (present) OCT4 charging_char := ?;
var template (present) OCT1 nsapi := ?;
if (not istemplatekind(ctx, "omit")) {
var PdpContext ctx_val := valueof(ctx);
imsi := char2oct(f_dec_TBCD(imsi_hex2oct(ctx_val.imsi)));
msisdn := char2oct(f_dec_TBCD(substr(ctx_val.msisdn, 1, lengthof(ctx_val.msisdn) -1)));
imeisv := char2oct(f_dec_TBCD(ctx_val.imeisv));
rat_type := ctx_val.ratType;
charging_char := char2oct(oct2str(ctx_val.charging_char));
nsapi := char2oct(hex2str(bit2hex(ctx_val.nsapi)));
}
select (req_type) {
case (INITIAL_REQUEST) {
tpl := tr_DIAMETER(flags:='11000000'B, cmd_code:=Credit_Control,
avps := superset(
tr_AVP_SessionId,
tr_AVP_OriginHost(smf_origin_host),
tr_AVP_OriginRealm(g_gy_pars.origin_realm),
tr_AVP_DestinationRealm(g_gy_pars.origin_realm),
tr_AVP_AuthAppId(int2oct(c_DIAMETER_CREDIT_CONTROL_AID, 4)),
tr_AVP_ServiceContextId,
tr_AVP_CcReqType(req_type),
tr_AVP_CcReqNum(?),
tr_AVP_EventTimestamp(?),
tr_AVP_SubcrId({tr_AVP_SubcrIdType(END_USER_IMSI), tr_AVP_SubcrIdData(imsi)}),
tr_AVP_SubcrId({tr_AVP_SubcrIdType(END_USER_E164), tr_AVP_SubcrIdData(msisdn)}),
tr_AVP_RequestedAction(DIRECT_DEBITING),
tr_AVP_3GPP_AoCRequestType,
tr_AVP_MultipleServicesIndicator,
tr_AVP_Multiple_Services_Credit_Control(content := superset(
tr_AVP_Requested_Service_Unit,
tr_AVP_Used_Service_Unit,
tr_AVP_PCC_3GPP_QoS_Information,
tr_AVP_GI_3GPP_RatType(rat_type)
)),
tr_AVP_3GPP_ServiceInformation(content := superset(
tr_AVP_3GPP_PSInformation(content := superset(
tr_AVP_3GPP_ChargingId,
tr_AVP_3GPP_PDPType((IPv4,IPv6,IPv4v6)),
tr_AVP_3GPP_PDPAddress(tr_AVP_Address((IP,IP6), ?)),
tr_AVP_3GPP_SGSNAddress(tr_AVP_Address(IP, f_inet_addr(m_bind_ip_gtpc))),
tr_AVP_3GPP_GGSNAddress(tr_AVP_Address(IP, f_inet_addr(m_ggsn_ip_gtpc))),
tr_AVP_3GPP_CalledStationId,
tr_AVP_3GPP_SelectionMode,
tr_AVP_3GPP_ChargingCharacteristics(charging_char),
tr_AVP_3GPP_SGSNMCCMNC,
tr_AVP_3GPP_NSAPI(nsapi),
tr_AVP_3GPP_MS_TimeZone,
tr_AVP_3GPP_ULI,
tr_AVP_UserEquipmentInfo({
tr_AVP_UserEquipmentInfoType(IMEISV),
tr_AVP_UserEquipmentInfoValue(imeisv)
})
))
))
));
}
case (UPDATE_REQUEST) {
tpl := tr_DIAMETER(flags:='11000000'B, cmd_code:=Credit_Control,
avps := superset(
tr_AVP_SessionId,
tr_AVP_OriginHost(smf_origin_host),
tr_AVP_OriginRealm(g_gy_pars.origin_realm),
tr_AVP_DestinationRealm(g_gy_pars.origin_realm),
tr_AVP_AuthAppId(int2oct(c_DIAMETER_CREDIT_CONTROL_AID, 4)),
tr_AVP_ServiceContextId,
tr_AVP_CcReqType(req_type),
tr_AVP_CcReqNum(?),
tr_AVP_DestinationHost(?),
tr_AVP_EventTimestamp(?),
tr_AVP_SubcrId({tr_AVP_SubcrIdType(END_USER_IMSI), tr_AVP_SubcrIdData(imsi)}),
tr_AVP_SubcrId({tr_AVP_SubcrIdType(END_USER_E164), tr_AVP_SubcrIdData(msisdn)}),
tr_AVP_RequestedAction(DIRECT_DEBITING),
tr_AVP_3GPP_AoCRequestType,
tr_AVP_Multiple_Services_Credit_Control(content := superset(
tr_AVP_Requested_Service_Unit,
tr_AVP_Used_Service_Unit,
/* tr_AVP_3GPP_Reporting_Reason, can be sometimes inside UsedServiceUnit */
tr_AVP_PCC_3GPP_QoS_Information,
tr_AVP_GI_3GPP_RatType(rat_type)
)),
tr_AVP_3GPP_ServiceInformation(content := superset(
tr_AVP_3GPP_PSInformation(content := superset(
tr_AVP_3GPP_ChargingId,
/* tr_AVP_3GPP_PDPType, Only in INIT */
tr_AVP_3GPP_PDPAddress(tr_AVP_Address((IP,IP6), ?)),
tr_AVP_3GPP_SGSNAddress(tr_AVP_Address(IP, f_inet_addr(m_bind_ip_gtpc))),
tr_AVP_3GPP_GGSNAddress(tr_AVP_Address(IP, f_inet_addr(m_ggsn_ip_gtpc))),
tr_AVP_3GPP_CalledStationId,
tr_AVP_3GPP_SelectionMode,
tr_AVP_3GPP_ChargingCharacteristics(charging_char),
tr_AVP_3GPP_SGSNMCCMNC,
tr_AVP_3GPP_NSAPI(nsapi),
tr_AVP_3GPP_MS_TimeZone,
tr_AVP_3GPP_ULI,
tr_AVP_UserEquipmentInfo({
tr_AVP_UserEquipmentInfoType(IMEISV),
tr_AVP_UserEquipmentInfoValue(imeisv)
})
))
))
));
}
case (TERMINATION_REQUEST) {
tpl := tr_DIAMETER(flags:='11000000'B, cmd_code:=Credit_Control,
avps := superset(
tr_AVP_SessionId,
tr_AVP_OriginHost(smf_origin_host),
tr_AVP_OriginRealm(g_gy_pars.origin_realm),
tr_AVP_DestinationRealm(g_gy_pars.origin_realm),
tr_AVP_AuthAppId(int2oct(c_DIAMETER_CREDIT_CONTROL_AID, 4)),
tr_AVP_ServiceContextId,
tr_AVP_CcReqType(req_type),
tr_AVP_CcReqNum(?),
tr_AVP_DestinationHost(?),
tr_AVP_EventTimestamp(?),
tr_AVP_SubcrId({tr_AVP_SubcrIdType(END_USER_IMSI), tr_AVP_SubcrIdData(imsi)}),
tr_AVP_SubcrId({tr_AVP_SubcrIdType(END_USER_E164), tr_AVP_SubcrIdData(msisdn)}),
tr_AVP_TerminationCause(?),
tr_AVP_RequestedAction(DIRECT_DEBITING),
tr_AVP_3GPP_AoCRequestType,
tr_AVP_Multiple_Services_Credit_Control(content := superset(
/* tr_AVP_Requested_Service_Unit, Only in INIT and UPDATE */
tr_AVP_Used_Service_Unit,
tr_AVP_3GPP_Reporting_Reason(FINAL),
tr_AVP_PCC_3GPP_QoS_Information,
tr_AVP_GI_3GPP_RatType(rat_type)
)),
tr_AVP_3GPP_ServiceInformation(content := superset(
tr_AVP_3GPP_PSInformation(content := superset(
tr_AVP_3GPP_ChargingId,
/* tr_AVP_3GPP_PDPType, Only in INIT */
tr_AVP_3GPP_PDPAddress(tr_AVP_Address((IP,IP6), ?)),
tr_AVP_3GPP_SGSNAddress(tr_AVP_Address(IP, f_inet_addr(m_bind_ip_gtpc))),
tr_AVP_3GPP_GGSNAddress(tr_AVP_Address(IP, f_inet_addr(m_ggsn_ip_gtpc))),
tr_AVP_3GPP_CalledStationId,
tr_AVP_3GPP_SelectionMode,
tr_AVP_3GPP_ChargingCharacteristics(charging_char),
tr_AVP_3GPP_SGSNMCCMNC,
tr_AVP_3GPP_NSAPI(nsapi),
tr_AVP_3GPP_MS_TimeZone,
tr_AVP_3GPP_ULI,
tr_AVP_UserEquipmentInfo({
tr_AVP_UserEquipmentInfoType(IMEISV),
tr_AVP_UserEquipmentInfoValue(imeisv)
})
))
))
));
}
}
return tpl;
}
private altstep as_DIA_Gy_CCR(template (omit) PdpContext ctx, DCC_NONE_CC_Request_Type req_type) runs on GT_CT {
[] Gy_UNIT.receive(f_tr_DIA_Gy_CCR(ctx, req_type := req_type)) -> value g_rx_gy {
var template (value) PDU_DIAMETER tx_dia;
var template (omit) AVP avp;
var octetstring sess_id;
var AVP_Unsigned32 req_num;
avp := f_DIAMETER_get_avp(g_rx_gy, c_AVP_Code_BASE_NONE_Session_Id);
sess_id := valueof(avp.avp_data.avp_BASE_NONE_Session_Id);
avp := f_DIAMETER_get_avp(g_rx_gy, c_AVP_Code_DCC_NONE_CC_Request_Number);
req_num := valueof(avp.avp_data.avp_DCC_NONE_CC_Request_Number);
if (g_gy_validity_time > 0) {
if (g_gy_volume_threshold > 0) {
tx_dia := ts_DIA_Gy_CCA_ValidityTimeVolumeThreshold(g_rx_gy.hop_by_hop_id, g_rx_gy.end_to_end_id, sess_id,
req_type, req_num, g_gy_validity_time, g_gy_volume_threshold);
} else {
tx_dia := ts_DIA_Gy_CCA_ValidityTime(g_rx_gy.hop_by_hop_id, g_rx_gy.end_to_end_id, sess_id,
req_type, req_num, g_gy_validity_time);
}
} else {
tx_dia := ts_DIA_Gy_CCA(g_rx_gy.hop_by_hop_id, g_rx_gy.end_to_end_id, sess_id,
req_type, req_num);
}
Gy_UNIT.send(tx_dia);
}
[] Gy_UNIT.receive(PDU_DIAMETER:?) -> value g_rx_gy {
Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail,
log2str("Received unexpected DIAMETER Gy", g_rx_gy));
}
}
/* send a PDP context activation */
function f_pdp_ctx_act(inout PdpContext ctx, template OCT1 exp_cause := '80'O) runs on GT_CT return CreatePDPContextResponse {
var Gtp1cUnitdata ud;
var CreatePDPContextResponse cpr;
var default d;
log("sending CreatePDP");
f_send_gtpc(ts_GTPC_CreatePDP(g_peer_c, g_c_seq_nr, ctx.imsi, g_restart_ctr,
ctx.teid, ctx.teic, ctx.nsapi, ctx.eua, ctx.apn,
g_sgsn_ip_c, g_sgsn_ip_u, ctx.msisdn, ctx.pco_req, ctx.ratType,
ctx.uli, ctx.charging_char, ctx.imeisv, ctx.ms_tz));
T_default.start;
d := activate(pingpong());
if (Gx_PROC.checkstate("Connected")) {
as_DIA_Gx_CCR(INITIAL_REQUEST);
}
if (Gy_PROC.checkstate("Connected")) {
as_DIA_Gy_CCR(ctx, INITIAL_REQUEST);
}
alt {
[] GTPC.receive(tr_GTPC_MsgType(g_peer_c, createPDPContextResponse, ctx.teic)) -> value ud {
f_handle_create_req(ctx, ud, exp_cause);
cpr := ud.gtpc.gtpc_pdu.createPDPContextResponse;
}
}
deactivate(d);
T_default.stop;
return cpr;
}
function f_pdp_ctx_exp_del_req(PdpContext ctx, template (omit) OCT1 expect_cause := omit, boolean expect_teardown := false) runs on GT_CT {
var Gtp1cUnitdata ud;
var default d;
T_default.start;
d := activate(pingpong());
alt {
[] GTPC.receive(tr_GTPC_MsgType(g_peer_c, deletePDPContextRequest, ctx.teic)) -> value ud {
if (istemplatekind(expect_cause, "omit") and not ispresent(ud.gtpc.gtpc_pdu.deletePDPContextRequest.cause.causevalue)) {
setverdict(pass);
} else if (not istemplatekind(expect_cause, "omit") and
ispresent(ud.gtpc.gtpc_pdu.deletePDPContextRequest.cause.causevalue) and
ud.gtpc.gtpc_pdu.deletePDPContextRequest.cause.causevalue == valueof(expect_cause)) {
setverdict(pass);
} else {
Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail,
"DeletePDPContextReq: cause expectancies didn't match");
}
if (expect_teardown == ispresent(ud.gtpc.gtpc_pdu.deletePDPContextRequest.tearDownIndicator)) {
setverdict(pass);
} else {
setverdict(fail);
Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail,
"DeletePDPContextReq: tearDownIndicator expectancies didn't match");
}
}
}
deactivate(d);
T_default.stop;
}
function f_pdp_ctx_del(PdpContext ctx, template BIT1 teardown_ind, OCT1 expect_causevalue := '80'O, boolean expect_diameter := true) runs on GT_CT {
var Gtp1cUnitdata ud;
var default d;
var OCT4 expect_teid;
/* 3GPP TS 29.060 sec 7.3.6 specifies TEID used in response
message with cause value "Non existent" shall be zero. */
if (expect_causevalue == 'C0'O) {
expect_teid := '00000000'O;
} else {
expect_teid := ctx.teic;
}
f_send_gtpc(ts_GTPC_DeletePDP(g_peer_c, g_c_seq_nr, ctx.teic_remote, ctx.nsapi, teardown_ind));
T_default.start;
d := activate(pingpong());
if (Gx_PROC.checkstate("Connected") and expect_diameter) {
as_DIA_Gx_CCR(TERMINATION_REQUEST);
}
if (Gy_PROC.checkstate("Connected") and expect_diameter) {
as_DIA_Gy_CCR(ctx, TERMINATION_REQUEST);
}
alt {
[] GTPC.receive(tr_GTPC_MsgType(g_peer_c, deletePDPContextResponse, expect_teid)) -> value ud {
if (ud.gtpc.gtpc_pdu.deletePDPContextResponse.cause.causevalue == expect_causevalue) {
setverdict(pass);
} else {
Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail,
"DeletePDPContextResp: cause expectancies didn't match");
}
}
}
deactivate(d);
T_default.stop;
}
/* send a Update PdP Context Request, expect Response */
function f_pdp_ctx_update(inout PdpContext ctx, OCT1 exp_cause := '80'O, template (omit) OCT4 new_teid := omit, template (omit) OCT4 new_teic := omit) runs on GT_CT {
var Gtp1cUnitdata ud;
var default d;
if (not istemplatekind(new_teid, "omit")) {
ctx.teid := valueof(new_teid);
}
if (not istemplatekind(new_teic, "omit")) {
ctx.teic := valueof(new_teic);
}
log("sending UpdatePDP");
f_send_gtpc(ts_GTPC_UpdatePDP(g_peer_c, ctx.teic_remote, g_c_seq_nr, ctx.imsi, g_restart_ctr,
ctx.teid, ctx.teic, ctx.nsapi, g_sgsn_ip_c, g_sgsn_ip_u,
ctx.pco_req, ctx.ratType, ctx.uli));
T_default.start;
d := activate(pingpong());
alt {
[] GTPC.receive(tr_GTPC_MsgType(g_peer_c, updatePDPContextResponse, ctx.teic)) -> value ud {
f_handle_update_req(ctx, ud, exp_cause);
}
}
deactivate(d);
T_default.stop;
}
/* IPv6 router solicitation fe80::2 -> ff02::2 from 02:88:b5:1f:25:59 */
const octetstring c_router_solicit := '6000000000103afffe800000000000000000000000000002ff02000000000000000000000000000285009f2b0000000001010288b51f2559'O;
/* IPv6 neighbor solicitation fe80::2 -> ff02::1:ff00:2 from 02:88:b5:1f:25:59 */
const octetstring c_neigh_solicit:= '6000000000203afffe800000000000000000000000000002ff0200000000000000000001ff00000287009f9600000000fe80000000000000000000000000000201010288b51f2559'O;
/* template for sending an ICMPv4 echo request */
template PDU_ICMP ts_ICMPv4_ERQ(octetstring data := ''O) := {
echo := {
type_field := 8,
code := 0,
checksum := '0000'O,
identifier := '0345'O,
sequence_number := '0001'O,
data := data
}
}
/* template for receiving/matching an ICMPv4 echo request */
template PDU_ICMP tr_ICMPv4_ERQ := {
echo := {
type_field := 8,
code := 0,
checksum := ?,
identifier := ?,
sequence_number := ?,
data := ?
}
}
/* template for receiving/matching an ICMPv4 echo reply */
template PDU_ICMP tr_ICMPv4_ERP(template octetstring data := *) := {
echo_reply := {
type_field := 0,
code := 0,
checksum := ?,
identifier := ?,
sequence_number := ?,
data := data
}
}
/* template for receiving/matching an ICMPv6 Destination Unreachable */
template PDU_ICMP tr_ICMPv4_DU := {
destination_unreachable := {
type_field := 1,
code := ?,
checksum := ?,
unused := ?,
original_ip_msg := ?
}
}
/* template to construct IPv4_packet from input arguments, ready for use in f_IPv4_enc() */
template IPv4_packet ts_IP4(OCT4 srcaddr, OCT4 dstaddr, LIN1 proto, LIN2_BO_LAST tlen, octetstring payload) := {
header := {
ver := 4,
hlen := 5,
tos := 0,
tlen := tlen,
id := 35902,
res := '0'B,
dfrag := '1'B,
mfrag := '0'B,
foffset := 0,
ttl := 64,
proto := proto,
cksum := 0,
srcaddr := srcaddr,
dstaddr := dstaddr
},
ext_headers := omit,
payload := payload
}
/* template to generate a 'Prefix Information' ICMPv6 option */
template OptionField ts_ICMP6_OptPrefix(OCT16 prefix, INT1 prefix_len) := {
prefixInformation := {
typeField := 3,
lengthIndicator := 8,
prefixLength := prefix_len,
reserved1 := '000000'B,
a_Bit := '0'B,
l_Bit := '0'B,
validLifetime := oct2int('FFFFFFFF'O),
preferredLifetime := oct2int('FFFFFFFF'O),
reserved2 := '00000000'O,
prefix := prefix
}
}
/* template for sending an ICMPv6 echo request */
template PDU_ICMPv6 ts_ICMPv6_ERQ := {
echoRequest := {
typeField := 128,
code := 0,
checksum := '0000'O,
identifier := 0,
sequenceNr := 0,
data := ''O
}
}
/* template for sending an ICMPv6 router solicitation */
template PDU_ICMPv6 ts_ICMPv6_RS := {
routerSolicitation := {
typeField := 133,
code := 0,
checksum := '0000'O,
reserved := '00000000'O,
/* TODO: do we need 'Source link-layer address' ? */
options := omit
}
}
/* template for sending an ICMPv6 router advertisement */
template PDU_ICMPv6 ts_ICMPv6_RA(OCT16 prefix, INT1 prefix_len) := {
routerAdvertisement := {
typeField := 134,
code := 0,
checksum := '0000'O,
curHopLimit := ?,
reserved := '000000'B,
o_Bit := '0'B,
m_Bit := '0'B,
routerLifetime := oct2int('FFFF'O),
reachableTime := oct2int('FFFFFFFF'O),
retransTimer := oct2int('FFFFFFFF'O),
options := {
ts_ICMP6_OptPrefix(prefix, prefix_len)
}
}
}
/* template for sending an ICMPv6 neighbor solicitation */
template PDU_ICMPv6 ts_ICMPv6_NS(OCT16 target_addr) := {
neighborSolicitation := {
typeField := 135,
code := 0,
checksum := '0000'O,
reserved := '00000000'O,
targetAddress := target_addr,
/* TODO: do we need 'Source link-layer address' ? */
options := omit
}
}
/* derive ICMPv6 link-local address from lower 64bit of link_id */
/* template for receiving/matching an ICMPv6 'Prefix Information' option */
template OptionField tr_ICMP6_OptPrefix(template OCT16 prefix, template INT1 prefix_len) := {
prefixInformation := {
typeField := 3,
lengthIndicator := 4,
prefixLength := prefix_len,
reserved1 := ?,
a_Bit := ?,
l_Bit := ?,
validLifetime := ?,
preferredLifetime := ?,
reserved2 := ?,
prefix := prefix
}
}
/* template for receiving/matching an ICMPv6 router advertisement */
template PDU_ICMPv6 tr_ICMPv6_RA(template OCT16 prefix, template INT1 prefix_len) := {
routerAdvertisement := {
typeField := 134,
code := 0,
checksum := ?,
curHopLimit := ?,
reserved := ?,
o_Bit := '0'B,
m_Bit := '0'B,
routerLifetime := ?,
reachableTime := ?,
retransTimer := ?,
options := {
tr_ICMP6_OptPrefix(prefix, prefix_len)
}
}
}
/* template for receiving/matching an ICMPv6 Destination Unreachable */
template PDU_ICMPv6 tr_ICMPv6_DU := {
destinationUnreachable := {
typeField := 1,
code := ?,
checksum := ?,
unused := ?,
originalIpMsg := ?
}
}
/* template for receiving/matching an ICMPv6 echo request */
template PDU_ICMPv6 tr_ICMPv6_ERQ := {
echoRequest := {
typeField := 128,
code := 0,
checksum := ?,
identifier := ?,
sequenceNr := ?,
data := ?
}
}
/* template for receiving/matching an ICMPv6 echo reply */
template PDU_ICMPv6 tr_ICMPv6_ERP(template octetstring data := *) := {
echoReply := {
typeField := 129,
code := 0,
checksum := ?,
identifier := ?,
sequenceNr := ?,
data := data
}
}
/* template to construct IPv6_packet from input arguments, ready for use in f_IPv6_enc() */
template IPv6_packet ts_IP6(OCT16 srcaddr, OCT16 dstaddr, LIN1 nexthead, octetstring payload, LIN1 hlim := 255) := {
header := {
ver := 6,
trclass := 0,
flabel := 0,
plen := 0,
nexthead := nexthead,
hlim := hlim,
srcaddr := srcaddr,
dstaddr := dstaddr
},
ext_headers := omit,
payload := payload
}
function f_ipv6_link_local(in OCT16 link_id) return OCT16 {
return 'FE80000000000000'O & substr(link_id, 8, 8);
}
function f_ipv6_global(in OCT16 link_id) return OCT16 {
return substr(link_id, 0, 8) & '1234123412341234'O;
}
/* Create a new different IPv6 addr from input. Starts mangling at byte prefix. */
function f_ipv6_mangle(in OCT16 addr, in integer prefix := 0) return OCT16 {
var integer i;
var octetstring res := substr(addr, 0, prefix);
for (i := prefix; i < lengthof(addr); i := i + 1) {
var octetstring a := addr[i] xor4b '11'O;
res := res & a;
}
return res;
}
/* Compute solicited-node multicast address as per RFC4291 2.7.1 */
function f_ipv6_sol_node_mcast(in OCT16 addr) return OCT16 {
return 'FF0200000000000000000001FF'O & substr(addr, 13, 3);
}
/* generate and encode ICMPv6 router solicitation */
function f_gen_icmpv6_router_solicitation(in OCT16 link_id) return octetstring {
const OCT16 c_ip6_all_router_mcast := 'FF020000000000000000000000000002'O;
var OCT16 saddr := f_ipv6_link_local(link_id);
var octetstring tmp;
tmp := f_enc_PDU_ICMPv6(valueof(ts_ICMPv6_RS), saddr, c_ip6_all_router_mcast);
var IPv6_packet ip6 := valueof(ts_IP6(saddr, c_ip6_all_router_mcast, 58, tmp));
return f_IPv6_enc(ip6);
}
/* Get link-id from PDP Context EUA */
function f_ctx_get_ipv6_interface_id(in PdpContext ctx) return OCT16 {
var OCT16 interface_id;
if (ischosen(ctx.eua.endUserAddress.endUserAddressIPv4andIPv6)) {
interface_id := ctx.eua.endUserAddress.endUserAddressIPv4andIPv6.ipv6_address;
} else if (ischosen(ctx.eua.endUserAddress.endUserAddressIPv6)) {
interface_id := ctx.eua.endUserAddress.endUserAddressIPv6.ipv6_address;
} else {
Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, "Unexpected request to submit icmpv6 rs in IPv4 PDP context");
}
return interface_id;
}
/* create ICMPv6 router solicitation deriving link-id from PDP Context EUA */
function f_icmpv6_rs_for_pdp(in PdpContext ctx) return octetstring {
var OCT16 interface_id := f_ctx_get_ipv6_interface_id(ctx);
return f_gen_icmpv6_router_solicitation(interface_id);
}
/* generate and encode ICMPv6 neighbor solicitation */
function f_gen_icmpv6_neigh_solicit(in OCT16 saddr, in OCT16 daddr, in OCT16 tgt_addr) return octetstring {
var octetstring tmp;
tmp := f_enc_PDU_ICMPv6(valueof(ts_ICMPv6_NS(tgt_addr)), saddr, daddr);
var IPv6_packet ip6 := valueof(ts_IP6(saddr, daddr, 58, tmp));
return f_IPv6_enc(ip6);
}
/* generate and encode ICMPv6 neighbor solicitation for PDP Context */
function f_gen_icmpv6_neigh_solicit_for_pdp(in PdpContext ctx) return octetstring {
var OCT16 interface_id := f_ctx_get_ipv6_interface_id(ctx);
var OCT16 link_local := f_ipv6_link_local(interface_id);
var OCT16 daddr := f_ipv6_sol_node_mcast(link_local);
return f_gen_icmpv6_neigh_solicit(link_local, daddr, link_local);
}
/* Send an ICMPv4 echo msg through GTP given pdp ctx, and ip src and dst addr */
function f_gen_icmpv4_echo(OCT4 saddr, OCT4 daddr, octetstring pl := ''O) return octetstring {
var octetstring tmp := f_enc_PDU_ICMP(valueof(ts_ICMPv4_ERQ(pl)));
var IPv4_packet ip4 := valueof(ts_IP4(saddr, daddr, 1, 50, tmp));
var octetstring data := f_IPv4_enc(ip4);
var OCT2 cksum := f_IPv4_checksum(data);
data[10] := cksum[0];
data[11] := cksum[1];
return data;
}
/* Send an ICMPv6 echo msg through GTP given pdp ctx, and ip src and dst addr */
function f_gen_icmpv6_echo(OCT16 saddr, OCT16 daddr) return octetstring {
var octetstring tmp := f_enc_PDU_ICMPv6(valueof(ts_ICMPv6_ERQ), saddr, daddr);
var IPv6_packet ip6 := valueof(ts_IP6(saddr, daddr, 58, tmp));
var octetstring data := f_IPv6_enc(ip6);
return data;
}
/* Wait for ICMPv4 from GTP */
function f_wait_icmp4(PdpContext ctx, template PDU_ICMP expected) runs on GT_CT {
var Gtp1uUnitdata ud;
T_default.start;
alt {
[] GTPU.receive(tr_GTPU_GPDU(g_peer_u, ctx.teid)) -> value ud {
if (f_verify_gtpu_txseq(ud.gtpu, use_gtpu_txseq) == false) {
setverdict(fail);
stop;
}
var octetstring gpdu := ud.gtpu.gtpu_IEs.g_PDU_IEs.data;
var IPv4_packet ip4 := f_IPv4_dec(gpdu);
if (ip4.header.ver != 4) {
repeat;
}
var PDU_ICMP icmp4 := f_dec_PDU_ICMP(ip4.payload);
if (not match(icmp4, expected)) {
repeat;
}
}
[] GTPU.receive(tr_GTPU_GPDU(g_peer_u, ?)) -> value ud {
Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail,
"Received wrong local TEID");
}
[] GTPU.receive { setverdict(fail); }
[] T_default.timeout { setverdict(fail); }
}
T_default.stop;
}
/* Wait for ICMPv4 echo request from GTP */
function f_wait_icmp4_echo_request(PdpContext ctx) runs on GT_CT {
f_wait_icmp4(ctx, tr_ICMPv4_ERQ);
}
/* Wait for ICMPv4 echo reply (or unreachable) from GTP */
function f_wait_icmp4_echo_reply(PdpContext ctx) runs on GT_CT {
f_wait_icmp4(ctx, (tr_ICMPv4_ERP, tr_ICMPv4_DU));
}
/* Wait for ICMPv6 from GTP */
function f_wait_icmp6(PdpContext ctx, template PDU_ICMPv6 expected) runs on GT_CT {
var Gtp1uUnitdata ud;
T_default.start;
alt {
[] GTPU.receive(tr_GTPU_GPDU(g_peer_u, ?)) -> value ud {
if (f_verify_gtpu_txseq(ud.gtpu, use_gtpu_txseq) == false) {
setverdict(fail);
stop;
}
var octetstring gpdu := ud.gtpu.gtpu_IEs.g_PDU_IEs.data;
var IPv6_packet ip6 := f_IPv6_dec(gpdu);
if (ip6.header.ver != 6 or ip6.header.nexthead != 58) {
repeat;
}
var PDU_ICMPv6 icmp6 := f_dec_PDU_ICMPv6(ip6.payload);
if (not match(icmp6, expected)) {
repeat;
}
/* We are waiting for RA, update ctx */
if (match(icmp6, tr_ICMPv6_RA(?, 64))) {
ctx.ip6_prefix := icmp6.routerAdvertisement.options[0].prefixInformation.prefix;
log("RA with /64 prefix ", ctx.ip6_prefix);
}
}
[] GTPU.receive(tr_GTPU_GPDU(?, ?)) { repeat; }
[] GTPU.receive { setverdict(fail); }
[] T_default.timeout { setverdict(fail); }
}
T_default.stop;
}
/* wait for GGSN to send us an ICMPv6 router advertisement */
function f_wait_rtr_adv(PdpContext ctx) runs on GT_CT {
f_wait_icmp6(ctx, tr_ICMPv6_RA(?, 64));
}
/* Wait for ICMPv6 echo request from GTP */
function f_wait_icmp6_echo_request(PdpContext ctx) runs on GT_CT {
f_wait_icmp6(ctx, tr_ICMPv6_ERQ);
}
/* Wait for ICMPv6 echo reply (or unreachable) from GTP */
function f_wait_icmp6_echo_reply(PdpContext ctx) runs on GT_CT {
f_wait_icmp6(ctx, (tr_ICMPv6_ERP,tr_ICMPv6_DU));
}
/* create ICMPv6 router solicitation deriving link-id from PDP Context EUA */
function f_icmpv6_rs_for_pdp46(in PdpContext ctx) return octetstring {
var OCT16 interface_id := ctx.eua.endUserAddress.endUserAddressIPv4andIPv6.ipv6_address;
return f_gen_icmpv6_router_solicitation(interface_id);
}
/* generate and encode ICMPv6 neighbor solicitation for PDP Context */
function f_gen_icmpv6_neigh_solicit_for_pdp46(in PdpContext ctx) return octetstring {
var OCT16 interface_id := ctx.eua.endUserAddress.endUserAddressIPv4andIPv6.ipv6_address;
var OCT16 link_local := f_ipv6_link_local(interface_id);
var OCT16 daddr := f_ipv6_sol_node_mcast(link_local);
return f_gen_icmpv6_neigh_solicit(link_local, daddr, link_local);
}
/* Assert we don't receive a ICMPv4/6 echo reply (or unreachable) from GTP */
function f_wait_gtpu_fail(PdpContext ctx) runs on GT_CT {
T_default.start;
alt {
[] GTPU.receive { setverdict(fail); }
[] T_default.timeout { }
}
T_default.stop;
}
/* list of protocols where we don't accept duplicates */
const OCT2List protocol_ids_nodupes := { 'C021'O, 'C023'O, 'C223'O, '8021'O };
private function f_PCO_permits_duplicates(OCT2 id) return boolean {
var integer i;
for (i := 0; i < lengthof(protocol_ids_nodupes); i := i+1) {
if (id == protocol_ids_nodupes[i]) {
return false;
}
}
return true;
}
/* ensure that every given protocol Identifier exist only exactly once in the PCO */
function f_PCO_ensure_no_duplicates(ProtConfigOptions pco) {
var OCT2List protocol_ids := {};
var integer i, j;
for (i := 0; i < lengthof(pco.protocols); i := i+1) {
var OCT2 id := pco.protocols[i].protocolID;
for (j := 0; j < lengthof(protocol_ids); j := j+1) {
if (not f_PCO_permits_duplicates(id) and id == protocol_ids[j]) {
setverdict(fail, "Duplicate ProtocolID ", id, " already present in ", pco.protocols);
}
}
protocol_ids := protocol_ids & { id };
}
}
/* Test IPv6 context activation for dynamic IPv6 EUA without request of IPv6 DNS */
testcase TC_pdp6_act_deact() runs on GT_CT {
f_init();
var PdpContext ctx := valueof(t_DefinePDP(f_rnd_imsi('26242'H), "1234", c_ApnInet6, valueof(t_EuaIPv6Dyn)));
f_pdp_ctx_act(ctx);
f_pdp_ctx_del(ctx, '1'B);
f_shutdown_helper();
}
/* Test IPv6 context activation for dynamic IPv6 EUA wirh request of IPv6 DNS in PCO */
testcase TC_pdp6_act_deact_pcodns() runs on GT_CT {
f_init();
var PdpContext ctx := valueof(t_DefinePDP(f_rnd_imsi('26242'H), "1234", c_ApnInet6, valueof(t_EuaIPv6Dyn)));
ctx.pco_req := valueof(ts_PCO_IPv6_DNS);
f_pdp_ctx_act(ctx);
f_PCO_ensure_no_duplicates(ctx.pco_neg);
/* verify PCO contains both primary and secondary DNS */
var OCT4 ggsn_ip6_dns1 := f_inet6_addr(m_ggsn_ip6_dns1);
if (not match(f_PCO_extract_proto(ctx.pco_neg, '0003'O, 1), ggsn_ip6_dns1)) {
setverdict(fail, "Primary DNS IPv6 PCO option not found");
}
var OCT4 ggsn_ip6_dns2 := f_inet6_addr(m_ggsn_ip6_dns2);
if (not match(f_PCO_extract_proto(ctx.pco_neg, '0003'O, 2), ggsn_ip6_dns2)) {
setverdict(fail, "Secondary DNS IPv6 PCO option not found");
}
f_pdp_ctx_del(ctx, '1'B);
f_shutdown_helper();
}
/* Test PDP context activation for dynamic IPv6 EUA with IPv6 DNS in PCO and router solicitation/advertisement */
testcase TC_pdp6_act_deact_icmp6() runs on GT_CT {
f_init();
var PdpContext ctx := valueof(t_DefinePDP(f_rnd_imsi('26242'H), "1234", c_ApnInet6, valueof(t_EuaIPv6Dyn)));
ctx.pco_req := valueof(ts_PCO_IPv6_DNS);
f_pdp_ctx_act(ctx);
f_PCO_ensure_no_duplicates(ctx.pco_neg);
//f_send_gtpu(ctx, c_router_solicit);
//f_send_gtpu(ctx, c_neigh_solicit);
f_send_gtpu(ctx, f_icmpv6_rs_for_pdp(ctx));
f_wait_rtr_adv(ctx);
f_send_gtpu(ctx, f_gen_icmpv6_neigh_solicit_for_pdp(ctx));
f_pdp_ctx_del(ctx, '1'B);
f_shutdown_helper();
}
/* Test PDP context activation for dynamic IPv6 EUA with IPv6 DNS in PCO and router solicitation/advertisement.
Test we can send ICMPv6 ping over GTPU to DNS server. */
testcase TC_pdp6_act_deact_gtpu_access() runs on GT_CT {
f_init();
var PdpContext ctx := valueof(t_DefinePDP(f_rnd_imsi('26242'H), "1234", c_ApnInet6, valueof(t_EuaIPv6Dyn)));
ctx.pco_req := valueof(ts_PCO_IPv6_DNS);
f_pdp_ctx_act(ctx);
f_send_gtpu(ctx, f_icmpv6_rs_for_pdp(ctx));
f_wait_rtr_adv(ctx);
f_send_gtpu(ctx, f_gen_icmpv6_neigh_solicit_for_pdp(ctx));
var OCT16 dns1_addr := f_PCO_extract_proto(ctx.pco_neg, '0003'O);
/* Check if we can use valid link-local src addr. */
var OCT16 saddr_ll := f_ipv6_link_local(ctx.eua.endUserAddress.endUserAddressIPv6.ipv6_address);
f_send_gtpu(ctx, f_gen_icmpv6_echo(saddr_ll, dns1_addr));
if (m_ggsn_impl == GGSN_IMPL_OSMOCOM) {
f_wait_icmp6_echo_reply(ctx);
} else {
f_wait_gtpu_fail(ctx);
}
/* Check if we can use valid global src addr, should work */
var OCT16 saddr_glob := f_ipv6_global(ctx.eua.endUserAddress.endUserAddressIPv6.ipv6_address);
f_send_gtpu(ctx, f_gen_icmpv6_echo(saddr_glob, dns1_addr));
f_wait_icmp6_echo_reply(ctx);
f_pdp_ctx_del(ctx, '1'B);
f_shutdown_helper();
}
/* Check that attempting RA with another ll src addr won't work, packet dropped: */
testcase TC_pdp6_act_deact_gtpu_access_wrong_ll_saddr() runs on GT_CT {
f_init();
var PdpContext ctx := valueof(t_DefinePDP(f_rnd_imsi('26242'H), "1234", c_ApnInet6, valueof(t_EuaIPv6Dyn)));
ctx.pco_req := valueof(ts_PCO_IPv6_DNS);
f_pdp_ctx_act(ctx);
f_send_gtpu(ctx, f_icmpv6_rs_for_pdp(ctx));
f_wait_rtr_adv(ctx);
f_send_gtpu(ctx, f_gen_icmpv6_neigh_solicit_for_pdp(ctx));
var OCT16 saddr_ll := f_ipv6_link_local(ctx.eua.endUserAddress.endUserAddressIPv6.ipv6_address);
var OCT16 saddr_ll_wrong := f_ipv6_mangle(saddr_ll, 8);
f_send_gtpu(ctx, f_gen_icmpv6_router_solicitation(saddr_ll_wrong));
f_wait_gtpu_fail(ctx);
f_pdp_ctx_del(ctx, '1'B);
f_shutdown_helper();
}
/* Assert that packets with wrong global src addr are dropped by GGSN */
testcase TC_pdp6_act_deact_gtpu_access_wrong_global_saddr() runs on GT_CT {
f_init();
var PdpContext ctx := valueof(t_DefinePDP(f_rnd_imsi('26242'H), "1234", c_ApnInet6, valueof(t_EuaIPv6Dyn)));
ctx.pco_req := valueof(ts_PCO_IPv6_DNS);
f_pdp_ctx_act(ctx);
f_send_gtpu(ctx, f_icmpv6_rs_for_pdp(ctx));
f_wait_rtr_adv(ctx);
f_send_gtpu(ctx, f_gen_icmpv6_neigh_solicit_for_pdp(ctx));
var OCT16 dns1_addr := f_PCO_extract_proto(ctx.pco_neg, '0003'O);
var OCT16 saddr_glob := f_ipv6_global(ctx.eua.endUserAddress.endUserAddressIPv6.ipv6_address);
var OCT16 saddr_wrong := f_ipv6_mangle(saddr_glob);
f_send_gtpu(ctx, f_gen_icmpv6_echo(saddr_wrong, dns1_addr));
f_wait_gtpu_fail(ctx);
f_pdp_ctx_del(ctx, '1'B);
f_shutdown_helper();
}
/* Send an IPv4 ICMP ECHO REQUEST to APN6, should fail (packet dropped */
testcase TC_pdp6_act_deact_gtpu_access_ipv4_apn6() runs on GT_CT {
f_init();
var PdpContext ctx := valueof(t_DefinePDP(f_rnd_imsi('26242'H), "1234", c_ApnInet6, valueof(t_EuaIPv6Dyn)));
ctx.pco_req := valueof(ts_PCO_IPv6_DNS);
f_pdp_ctx_act(ctx);
f_send_gtpu(ctx, f_icmpv6_rs_for_pdp(ctx));
f_wait_rtr_adv(ctx);
f_send_gtpu(ctx, f_gen_icmpv6_neigh_solicit_for_pdp(ctx));
var OCT4 saddr_v4 := f_inet_addr("192.168.10.2");
var OCT4 daddr_v4 := f_inet_addr("8.8.8.8");
f_send_gtpu(ctx, f_gen_icmpv4_echo(saddr_v4, daddr_v4));
f_wait_gtpu_fail(ctx);
f_pdp_ctx_del(ctx, '1'B);
f_shutdown_helper();
}
/* Validate if different clients (pdp ctx) can reach one another through GGSN. */
testcase TC_pdp6_clients_interact() runs on GT_CT {
f_init();
var PdpContext ctxA := valueof(t_DefinePDP(f_rnd_imsi('26242'H), "1234", c_ApnInet6, valueof(t_EuaIPv6Dyn)));
var PdpContext ctxB := valueof(t_DefinePDP(f_rnd_imsi('26242'H), "1234", c_ApnInet6, valueof(t_EuaIPv6Dyn)));
f_pdp_ctx_act(ctxA);
f_send_gtpu(ctxA, f_icmpv6_rs_for_pdp(ctxA));
f_wait_rtr_adv(ctxA);
f_send_gtpu(ctxA, f_gen_icmpv6_neigh_solicit_for_pdp(ctxA));
f_pdp_ctx_act(ctxB);
f_send_gtpu(ctxB, f_icmpv6_rs_for_pdp(ctxB));
f_wait_rtr_adv(ctxB);
f_send_gtpu(ctxB, f_gen_icmpv6_neigh_solicit_for_pdp(ctxB));
var OCT16 addrA_ll := f_ipv6_link_local(ctxA.eua.endUserAddress.endUserAddressIPv6.ipv6_address);
var OCT16 addrB_ll := f_ipv6_link_local(ctxB.eua.endUserAddress.endUserAddressIPv6.ipv6_address);
var OCT16 addrA_glob := f_ipv6_global(ctxA.eua.endUserAddress.endUserAddressIPv6.ipv6_address);
var OCT16 addrB_glob := f_ipv6_global(ctxB.eua.endUserAddress.endUserAddressIPv6.ipv6_address);
/* Validate if clients can interact using ll addr. */
f_send_gtpu(ctxA, f_gen_icmpv6_echo(addrA_ll, addrB_ll));
f_wait_gtpu_fail(ctxB);
/* Validate if clients can interact using global addr. */
f_send_gtpu(ctxA, f_gen_icmpv6_echo(addrA_glob, addrB_glob));
f_wait_gtpu_fail(ctxB);
f_pdp_ctx_del(ctxA, '1'B);
f_pdp_ctx_del(ctxB, '1'B);
f_shutdown_helper();
}
/* Test PDP context activation for dynamic IPv4 EUA without DNS request */
testcase TC_pdp4_act_deact() runs on GT_CT {
f_init();
var PdpContext ctx := valueof(t_DefinePDP(f_rnd_imsi('26242'H), "1234", c_ApnInternet, valueof(t_EuaIPv4Dyn)));
f_pdp_ctx_act(ctx);
f_pdp_ctx_del(ctx, '1'B);
f_shutdown_helper();
}
/* Test PDP context activation for dynamic IPv4 EUA with IPv4 DNS in IPCP */
testcase TC_pdp4_act_deact_ipcp() runs on GT_CT {
f_init();
var OCT4 ggsn_ip4_dns1 := f_inet_addr(m_ggsn_ip4_dns1);
var OCT4 ggsn_ip4_dns2 := f_inet_addr(m_ggsn_ip4_dns2);
var PdpContext ctx := valueof(t_DefinePDP(f_rnd_imsi('26242'H), "1234", c_ApnInternet, valueof(t_EuaIPv4Dyn)));
ctx.pco_req := valueof(ts_PCO_IPv4_DNS_IPCP);
f_pdp_ctx_act(ctx);
f_PCO_ensure_no_duplicates(ctx.pco_neg);
/* verify IPCP is at all contained */
if (not match(ctx.pco_neg, tr_PCO_Contains('8021'O))) {
setverdict(fail, "IPCP not found in PCO");
}
/* verify IPCP contains both primary and secondary DNS */
var IpcpPacket ipcp := dec_IpcpPacket(f_PCO_extract_proto(ctx.pco_neg, '8021'O));
if (not match(ipcp, tr_IPCP_Ack_DNS(0, ggsn_ip4_dns1, ggsn_ip4_dns2))) {
if (not match(ipcp, tr_IPCP_Ack_DNS(0))) {
setverdict(fail, "Primary/Secondary DNS PCO IPCP option not found");
} else {
setverdict(fail, "Primary/Secondary DNS PCO IPCP option found but not matching expected values");
}
}
f_pdp_ctx_del(ctx, '1'B);
f_shutdown_helper();
}
/* Test PDP context activation for dynamic IPv4 EUA with IPv4 DNS in IPCP + PAP authentication (broken) */
testcase TC_pdp4_act_deact_ipcp_pap_broken() runs on GT_CT {
f_init();
var OCT4 ggsn_ip4_dns1 := f_inet_addr(m_ggsn_ip4_dns1);
var OCT4 ggsn_ip4_dns2 := f_inet_addr(m_ggsn_ip4_dns2);
var PdpContext ctx := valueof(t_DefinePDP(f_rnd_imsi('26242'H), "1234", c_ApnInternet, valueof(t_EuaIPv4Dyn)));
ctx.pco_req := valueof(ts_PCO_PAP_IPv4_DNS);
f_pdp_ctx_act(ctx);
f_PCO_ensure_no_duplicates(ctx.pco_neg);
/* verify IPCP is at all contained */
if (not match(ctx.pco_neg, tr_PCO_Contains('8021'O))) {
setverdict(fail, "IPCP not found in PCO");
}
/* verify IPCP contains both primary and secondary DNS */
var IpcpPacket ipcp := dec_IpcpPacket(f_PCO_extract_proto(ctx.pco_neg, '8021'O));
if (not match(ipcp, tr_IPCP_Ack_DNS(0, ggsn_ip4_dns1, ggsn_ip4_dns2))) {
if (not match(ipcp, tr_IPCP_Ack_DNS(0))) {
setverdict(fail, "Primary/Secondary DNS PCO IPCP option not found");
} else {
setverdict(fail, "Primary/Secondary DNS PCO IPCP option found but not matching expected values");
}
}
/* verify that PAP is contained */
if (not match(ctx.pco_neg, tr_PCO_Contains('C023'O))) {
setverdict(fail, "PAP not found in PCO");
}
var PapPacket pap := dec_PapPacket(f_PCO_extract_proto(ctx.pco_neg, 'C023'O));
if (not match(pap, tr_PAP_AuthAck)) {
setverdict(fail, "PAP isn't an AuthenticateAck: ", pap);
}
f_pdp_ctx_del(ctx, '1'B);
f_shutdown_helper();
}
/* Test PDP context activation for dynamic IPv4 EUA with IPv4 DNS in PCO */
testcase TC_pdp4_act_deact_pcodns() runs on GT_CT {
f_init();
var PdpContext ctx := valueof(t_DefinePDP(f_rnd_imsi('26242'H), "1234", c_ApnInternet, valueof(t_EuaIPv4Dyn)));
ctx.pco_req := valueof(ts_PCO_IPv4_DNS_CONT);
f_pdp_ctx_act(ctx);
f_PCO_ensure_no_duplicates(ctx.pco_neg);
/* verify PCO contains both primary and secondary DNS */
var OCT4 ggsn_ip4_dns1 := f_inet_addr(m_ggsn_ip4_dns1);
if (not match(f_PCO_extract_proto(ctx.pco_neg, '000d'O, 1), ggsn_ip4_dns1)) {
setverdict(fail, "Primary DNS IPv4 PCO option not found");
}
var OCT4 ggsn_ip4_dns2 := f_inet_addr(m_ggsn_ip4_dns2);
if (not match(f_PCO_extract_proto(ctx.pco_neg, '000d'O, 2), ggsn_ip4_dns2)) {
setverdict(fail, "Secondary DNS IPv4 PCO option not found");
}
f_pdp_ctx_del(ctx, '1'B);
f_shutdown_helper();
}
/* Test PDP context activation for dynamic IPv4 EUA.
Test we can send ICMPv6 ping over GTPU to DNS server. */
testcase TC_pdp4_act_deact_gtpu_access() runs on GT_CT {
f_init();
var PdpContext ctx := valueof(t_DefinePDP(f_rnd_imsi('26242'H), "1234", c_ApnInternet, valueof(t_EuaIPv4Dyn)));
ctx.pco_req := valueof(ts_PCO_IPv4_DNS_CONT);
f_pdp_ctx_act(ctx);
f_PCO_ensure_no_duplicates(ctx.pco_neg);
var OCT4 dns1_addr := f_PCO_extract_proto(ctx.pco_neg, '000d'O);
/* Check if we can use valid global src addr, should work */
var OCT4 saddr := ctx.eua.endUserAddress.endUserAddressIPv4.ipv4_address;
f_send_gtpu(ctx, f_gen_icmpv4_echo(saddr, dns1_addr));
f_wait_icmp4_echo_reply(ctx);
f_pdp_ctx_del(ctx, '1'B);
f_shutdown_helper();
}
/* Assert that packets with wrong global src addr are dropped by GGSN */
testcase TC_pdp4_act_deact_gtpu_access_wrong_saddr() runs on GT_CT {
f_init();
var PdpContext ctx := valueof(t_DefinePDP(f_rnd_imsi('26242'H), "1234", c_ApnInternet, valueof(t_EuaIPv4Dyn)));
ctx.pco_req := valueof(ts_PCO_IPv4_DNS_CONT);
f_pdp_ctx_act(ctx);
f_PCO_ensure_no_duplicates(ctx.pco_neg);
var OCT4 dns1_addr := f_PCO_extract_proto(ctx.pco_neg, '000d'O);
var OCT4 saddr := ctx.eua.endUserAddress.endUserAddressIPv4.ipv4_address;
var OCT4 saddr_wrong := substr(saddr, 0, 3) & (saddr[3] xor4b '11'O);
f_send_gtpu(ctx, f_gen_icmpv4_echo(saddr_wrong, dns1_addr));
f_wait_gtpu_fail(ctx);
f_pdp_ctx_del(ctx, '1'B);
f_shutdown_helper();
}
/* Send an IPv6 RA to APN4, should fail (packet dropped) */
testcase TC_pdp4_act_deact_gtpu_access_ipv6_apn4() runs on GT_CT {
f_init();
var PdpContext ctx := valueof(t_DefinePDP(f_rnd_imsi('26242'H), "1234", c_ApnInternet, valueof(t_EuaIPv4Dyn)));
ctx.pco_req := valueof(ts_PCO_IPv4_DNS_CONT);
f_pdp_ctx_act(ctx);
/* Send an IPv6 RA to APN4, should fail (packet dropped) */
var OCT16 saddr_v6 := f_inet6_addr("fde4:8dba:82e1:2000:1:2:3:4");
f_send_gtpu(ctx, f_gen_icmpv6_router_solicitation(saddr_v6));
f_wait_gtpu_fail(ctx);
f_pdp_ctx_del(ctx, '1'B);
f_shutdown_helper();
}
/* Helper function for tests below. */
function f_pdp4_clients_interact() runs on GT_CT {
f_init();
var PdpContext ctxA := valueof(t_DefinePDP(f_rnd_imsi('26242'H), "1234", c_ApnInternet, valueof(t_EuaIPv4Dyn)));
var PdpContext ctxB := valueof(t_DefinePDP(f_rnd_imsi('26242'H), "1234", c_ApnInternet, valueof(t_EuaIPv4Dyn)));
f_pdp_ctx_act(ctxA);
f_pdp_ctx_act(ctxB);
var OCT4 addrA := ctxA.eua.endUserAddress.endUserAddressIPv4.ipv4_address;
var OCT4 addrB := ctxB.eua.endUserAddress.endUserAddressIPv4.ipv4_address;
f_send_gtpu(ctxA, f_gen_icmpv4_echo(addrA, addrB));
f_wait_icmp4_echo_request(ctxB);
f_pdp_ctx_del(ctxA, '1'B);
f_pdp_ctx_del(ctxB, '1'B);
}
/* Validate if different clients (pdp ctx) can reach one another through GGSN. */
testcase TC_pdp4_clients_interact_with_txseq() runs on GT_CT {
use_gtpu_txseq := true;
f_pdp4_clients_interact();
f_shutdown_helper();
}
/* Validate if different clients (pdp ctx) can reach one another through GGSN (without Tx sequence number). */
testcase TC_pdp4_clients_interact_without_txseq() runs on GT_CT {
use_gtpu_txseq := false;
f_pdp4_clients_interact();
f_shutdown_helper();
}
testcase TC_echo_req_resp() runs on GT_CT {
f_init();
f_send_gtpc(ts_GTPC_PING(g_peer_c, g_c_seq_nr));
T_default.start;
alt {
[] GTPC.receive(tr_GTPC_PONG(g_peer_c)) { setverdict(pass); };
[] GTPC.receive { repeat; };
[] T_default.timeout { setverdict(fail); }
}
T_default.stop;
f_shutdown_helper();
}
testcase TC_echo_req_resp_gtpu() runs on GT_CT {
f_init();
GTPU.send(ts_GTPU_PING(g_peer_u, g_d_seq_nr));
T_default.start;
alt {
[] GTPU.receive(tr_GTPU_PONG(g_peer_u)) { setverdict(pass); };
[] GTPU.receive { repeat; };
[] T_default.timeout { setverdict(fail); }
}
T_default.stop;
f_shutdown_helper();
}
/* Test if the parser can cope with PCO that only contain either a
* single primary DNS or a secondary DNS. */
testcase TC_pdp4_act_deact_with_single_dns() runs on GT_CT {
/* Note: an unpatched osmo-ggsn version will enter an endless-loop when
* the test is executed.
* see also: Change-Id Icffde89f9bc5d8fcadf6e2dd6c0b4de03440edd5 and OS#3288 */
f_init();
var PdpContext ctx := valueof(t_DefinePDP(f_rnd_imsi('26242'H), "1234", c_ApnInternet, valueof(t_EuaIPv4Dyn)));
var OCT4 ggsn_ip4_dns1 := f_inet_addr(m_ggsn_ip4_dns1);
var OCT4 ggsn_ip4_dns2 := f_inet_addr(m_ggsn_ip4_dns2);
var octetstring pco_neg_dns;
var octetstring pco_neg_dns_expected;
/* PCO with primary DNS only */
ctx.pco_req := valueof(ts_PCO_IPv4_PRI_DNS_IPCP);
f_pdp_ctx_act(ctx);
f_PCO_ensure_no_duplicates(ctx.pco_neg);
pco_neg_dns := f_PCO_extract_proto(ctx.pco_neg, '8021'O, 1);
pco_neg_dns_expected := '0200000A8106'O & ggsn_ip4_dns1
/* Note: The prepended hex bytes encode the following information:
* 0x02 = Configuration ACK
* 0x00 = Identifier
* 0x000a = Length
* 0x81 = Type (Primary DNS Server Address)
* 0x06 = Length
* (4 byte IP-Address appended) */
if (not match(pco_neg_dns, pco_neg_dns_expected)) {
setverdict(fail, "Primary DNS IPv4 PCO option not found");
}
f_pdp_ctx_del(ctx, '1'B);
/* PCO with secondary DNS only */
ctx := valueof(t_DefinePDP(f_rnd_imsi('26242'H), "1234", c_ApnInternet, valueof(t_EuaIPv4Dyn)));
ctx.pco_req := valueof(ts_PCO_IPv4_SEC_DNS_IPCP);
f_pdp_ctx_act(ctx);
pco_neg_dns := f_PCO_extract_proto(ctx.pco_neg, '8021'O, 1);
pco_neg_dns_expected := '0200000A8306'O & ggsn_ip4_dns2
if (not match(pco_neg_dns, pco_neg_dns_expected)) {
setverdict(fail, "Secondary DNS IPv4 PCO option not found");
}
f_pdp_ctx_del(ctx, '1'B);
f_shutdown_helper();
}
/* Test if the parser can cope with PCO that contains primary and secondary DNS in a separate IPCP container.
* Note: an unpatched osmo-ggsn version will enter an endless-loop when the test is run
* see Change-Id Icffde89f9bc5d8fcadf6e2dd6c0b4de03440edd5 and OS#3288. */
testcase TC_pdp4_act_deact_with_separate_dns() runs on GT_CT {
/* Note: an unpatched osmo-ggsn version will enter an endless-loop when
* the test is executed.
* see also: Change-Id Icffde89f9bc5d8fcadf6e2dd6c0b4de03440edd5 and OS#3288 */
f_init();
var PdpContext ctx := valueof(t_DefinePDP(f_rnd_imsi('26242'H), "1234", c_ApnInternet, valueof(t_EuaIPv4Dyn)));
var OCT4 ggsn_ip4_dns1 := f_inet_addr(m_ggsn_ip4_dns1);
var OCT4 ggsn_ip4_dns2 := f_inet_addr(m_ggsn_ip4_dns2);
var octetstring pco_neg_dns;
var octetstring pco_neg_dns_expected;
ctx.pco_req := valueof(ts_PCO_IPv4_SEPARATE_DNS_IPCP);
f_pdp_ctx_act(ctx);
/* Check if primary DNS is contained */
pco_neg_dns := f_PCO_extract_proto(ctx.pco_neg, '8021'O, 1);
pco_neg_dns_expected := '0200000A8106'O & ggsn_ip4_dns1
if (not match(pco_neg_dns, pco_neg_dns_expected)) {
setverdict(fail, "Primary DNS IPv4 PCO option not found");
}
/* Check if secondary DNS is contained */
/* This used to fail due to a bug in osmo-ggsn, see OS#3381 */
pco_neg_dns := f_PCO_extract_proto(ctx.pco_neg, '8021'O, 2);
pco_neg_dns_expected := '0200000A8306'O & ggsn_ip4_dns2
if (not match(pco_neg_dns, pco_neg_dns_expected)) {
setverdict(fail, "Secondary DNS IPv4 PCO option not found");
}
f_pdp_ctx_del(ctx, '1'B);
f_shutdown_helper();
}
/* Validate that SUT updates remote TEIC when requested through UpdatePDPContextRequest */
testcase TC_pdp4_act_update_teic() runs on GT_CT {
f_init();
var PdpContext ctx := valueof(t_DefinePDP(f_rnd_imsi('26242'H), "1234", c_ApnInternet, valueof(t_EuaIPv4Dyn)));
ctx.pco_req := valueof(ts_PCO_IPv4_DNS_CONT);
f_pdp_ctx_act(ctx);
/* UpdatePDPContestRequest changing the local TEIC */
var OCT4 new_teic := ctx.teic;
new_teic[3] := new_teic[3] xor4b '11'O;
f_pdp_ctx_update(ctx, new_teic := new_teic);
f_pdp_ctx_del(ctx, '1'B);
f_shutdown_helper();
}
/* Validate that SUT updates remote TEID when requested through UpdatePDPContextRequest */
testcase TC_pdp4_act_update_teid() runs on GT_CT {
f_init();
var PdpContext ctx := valueof(t_DefinePDP(f_rnd_imsi('26242'H), "1234", c_ApnInternet, valueof(t_EuaIPv4Dyn)));
ctx.pco_req := valueof(ts_PCO_IPv4_DNS_CONT);
f_pdp_ctx_act(ctx);
f_PCO_ensure_no_duplicates(ctx.pco_neg);
var OCT4 dns1_addr := f_PCO_extract_proto(ctx.pco_neg, '000d'O);
var OCT4 saddr := ctx.eua.endUserAddress.endUserAddressIPv4.ipv4_address;
/* Data is sent (back) to the local TEID established during CreatePDPContext */
f_send_gtpu(ctx, f_gen_icmpv4_echo(saddr, dns1_addr));
f_wait_icmp4_echo_reply(ctx);
/* UpdatePDPContestRequest changing the local TEID */
var OCT4 new_teid := ctx.teid;
new_teid[3] := new_teid[3] xor4b '11'O;
f_pdp_ctx_update(ctx, new_teid := new_teid);
/* Check if we can send data after updating the PDP context. Answer should be sent to the new TEID */
f_send_gtpu(ctx, f_gen_icmpv4_echo(saddr, dns1_addr));
f_wait_icmp4_echo_reply(ctx);
f_pdp_ctx_del(ctx, '1'B);
f_shutdown_helper();
}
/* Test IPv4v6 context activation for dynamic IPv4v6 EUA without DNS request */
testcase TC_pdp46_act_deact() runs on GT_CT {
f_init();
var PdpContext ctx := valueof(t_DefinePDP(f_rnd_imsi('26242'H), "1234", c_ApnInet46, valueof(t_EuaIPv4Dynv6Dyn)));
f_pdp_ctx_act(ctx);
f_pdp_ctx_del(ctx, '1'B);
f_shutdown_helper();
}
/* Test PDP context activation for dynamic IPv4v6 EUA with IPv4 DNS in IPCP */
testcase TC_pdp46_act_deact_ipcp() runs on GT_CT {
f_init();
var OCT4 ggsn_ip4_dns1 := f_inet_addr(m_ggsn_ip4_dns1);
var OCT4 ggsn_ip4_dns2 := f_inet_addr(m_ggsn_ip4_dns2);
var PdpContext ctx := valueof(t_DefinePDP(f_rnd_imsi('26242'H), "1234", c_ApnInet46, valueof(t_EuaIPv4Dynv6Dyn)));
ctx.pco_req := valueof(ts_PCO_IPv4_DNS_IPCP);
f_pdp_ctx_act(ctx);
f_PCO_ensure_no_duplicates(ctx.pco_neg);
/* verify IPCP is at all contained */
if (not match(ctx.pco_neg, tr_PCO_Contains('8021'O))) {
setverdict(fail, "IPCP not found in PCO");
}
f_PCO_ensure_no_duplicates(ctx.pco_neg);
/* verify IPCP contains both primary and secondary IPv4 DNS */
var IpcpPacket ipcp := dec_IpcpPacket(f_PCO_extract_proto(ctx.pco_neg, '8021'O));
if (not match(ipcp, tr_IPCP_Ack_DNS(0, ggsn_ip4_dns1, ggsn_ip4_dns2))) {
if (not match(ipcp, tr_IPCP_Ack_DNS(0))) {
setverdict(fail, "Primary/Secondary DNS PCO IPCP option not found");
} else {
setverdict(fail, "Primary/Secondary DNS PCO IPCP option found but not matching expected values");
}
}
f_pdp_ctx_del(ctx, '1'B);
f_shutdown_helper();
}
/* Test PDP context activation for dynamic IPv4v6 EUA with IPv6 DNS in PCO and router solicitation/advertisement */
testcase TC_pdp46_act_deact_icmp6() runs on GT_CT {
f_init();
var PdpContext ctx := valueof(t_DefinePDP(f_rnd_imsi('26242'H), "1234", c_ApnInet46, valueof(t_EuaIPv4Dynv6Dyn)));
ctx.pco_req := valueof(ts_PCO_IPv6_DNS);
f_pdp_ctx_act(ctx);
f_send_gtpu(ctx, f_icmpv6_rs_for_pdp46(ctx));
f_wait_rtr_adv(ctx);
f_send_gtpu(ctx, f_gen_icmpv6_neigh_solicit_for_pdp46(ctx));
f_pdp_ctx_del(ctx, '1'B);
f_shutdown_helper();
}
/* Test IPv4v6 context activation for dynamic IPv4v6 EUA with request of IPv4 DNS in PCO */
testcase TC_pdp46_act_deact_pcodns4() runs on GT_CT {
f_init();
var PdpContext ctx := valueof(t_DefinePDP(f_rnd_imsi('26242'H), "1234", c_ApnInet46, valueof(t_EuaIPv4Dynv6Dyn)));
ctx.pco_req := valueof(ts_PCO_IPv4_DNS_CONT);
f_pdp_ctx_act(ctx);
f_PCO_ensure_no_duplicates(ctx.pco_neg);
/* verify PCO contains both primary and secondary IPv4 DNS */
var OCT4 ggsn_ip4_dns1 := f_inet_addr(m_ggsn_ip4_dns1);
if (not match(f_PCO_extract_proto(ctx.pco_neg, '000d'O, 1), ggsn_ip4_dns1)) {
setverdict(fail, "Primary DNS IPv4 PCO option not found");
}
var OCT4 ggsn_ip4_dns2 := f_inet_addr(m_ggsn_ip4_dns2);
if (not match(f_PCO_extract_proto(ctx.pco_neg, '000d'O, 2), ggsn_ip4_dns2)) {
setverdict(fail, "Secondary DNS IPv4 PCO option not found");
}
f_pdp_ctx_del(ctx, '1'B);
f_shutdown_helper();
}
/* Test IPv4v6 context activation for dynamic IPv4v6 EUA with request of IPv6 DNS in PCO */
testcase TC_pdp46_act_deact_pcodns6() runs on GT_CT {
f_init();
var PdpContext ctx := valueof(t_DefinePDP(f_rnd_imsi('26242'H), "1234", c_ApnInet46, valueof(t_EuaIPv4Dynv6Dyn)));
ctx.pco_req := valueof(ts_PCO_IPv6_DNS);
f_pdp_ctx_act(ctx);
f_PCO_ensure_no_duplicates(ctx.pco_neg);
/* verify PCO contains both primary and secondary IPv6 DNS */
var OCT4 ggsn_ip6_dns1 := f_inet6_addr(m_ggsn_ip6_dns1);
if (not match(f_PCO_extract_proto(ctx.pco_neg, '0003'O, 1), ggsn_ip6_dns1)) {
setverdict(fail, "Primary DNS IPv6 PCO option not found");
}
var OCT4 ggsn_ip6_dns2 := f_inet6_addr(m_ggsn_ip6_dns2);
if (not match(f_PCO_extract_proto(ctx.pco_neg, '0003'O, 2), ggsn_ip6_dns2)) {
setverdict(fail, "Secondary DNS IPv6 PCO option not found");
}
f_pdp_ctx_del(ctx, '1'B);
f_shutdown_helper();
}
/* Test PDP context activation for dynamic IPv4v6 EUA.
Test we can send ICMPv6 ping over GTPU to DNS server. */
testcase TC_pdp46_act_deact_gtpu_access() runs on GT_CT {
f_init();
var PdpContext ctx := valueof(t_DefinePDP(f_rnd_imsi('26242'H), "1234", c_ApnInet46, valueof(t_EuaIPv4Dynv6Dyn)));
ctx.pco_req := valueof(ts_PCO_IPv4_DNS_CONT);
f_pdp_ctx_act(ctx);
var OCT4 dns1_addr := f_PCO_extract_proto(ctx.pco_neg, '000d'O);
/* Check if we can use valid global src addr, should work */
var OCT4 saddr := ctx.eua.endUserAddress.endUserAddressIPv4andIPv6.ipv4_address;
f_send_gtpu(ctx, f_gen_icmpv4_echo(saddr, dns1_addr));
f_wait_icmp4_echo_reply(ctx);
f_pdp_ctx_del(ctx, '1'B);
f_shutdown_helper();
}
/* Assert that packets with wrong ipv4 src addr are dropped by GGSN on APN IPv4v6 */
testcase TC_pdp46_act_deact_gtpu_access_wrong_saddr_ipv4() runs on GT_CT {
f_init();
var PdpContext ctx := valueof(t_DefinePDP(f_rnd_imsi('26242'H), "1234", c_ApnInet46, valueof(t_EuaIPv4Dynv6Dyn)));
ctx.pco_req := valueof(ts_PCO_IPv4_DNS_CONT);
f_pdp_ctx_act(ctx);
var OCT4 dns1_addr := f_PCO_extract_proto(ctx.pco_neg, '000d'O);
var OCT4 saddr := ctx.eua.endUserAddress.endUserAddressIPv4andIPv6.ipv4_address;
var OCT4 saddr_wrong := substr(saddr, 0, 3) & (saddr[3] xor4b '11'O);
f_send_gtpu(ctx, f_gen_icmpv4_echo(saddr_wrong, dns1_addr));
f_wait_gtpu_fail(ctx);
f_pdp_ctx_del(ctx, '1'B);
f_shutdown_helper();
}
/* Check that attempting RA with another ll src addr won't work, packet dropped: */
testcase TC_pdp46_act_deact_gtpu_access_wrong_ll_saddr_ipv6() runs on GT_CT {
f_init();
var PdpContext ctx := valueof(t_DefinePDP(f_rnd_imsi('26242'H), "1234", c_ApnInet46, valueof(t_EuaIPv4Dynv6Dyn)));
ctx.pco_req := valueof(ts_PCO_IPv4_DNS_CONT);
f_pdp_ctx_act(ctx);
var OCT16 saddr_ll := f_ipv6_link_local(ctx.eua.endUserAddress.endUserAddressIPv4andIPv6.ipv6_address);
var OCT16 saddr_ll_wrong := f_ipv6_mangle(saddr_ll, 8);
f_send_gtpu(ctx, f_gen_icmpv6_router_solicitation(saddr_ll_wrong));
f_wait_gtpu_fail(ctx);
f_pdp_ctx_del(ctx, '1'B);
f_shutdown_helper();
}
/* Assert that packets with wrong ipv6 global src addr are dropped by GGSN on APN IPv4v6 */
testcase TC_pdp46_act_deact_gtpu_access_wrong_global_saddr_ipv6() runs on GT_CT {
f_init();
var PdpContext ctx := valueof(t_DefinePDP(f_rnd_imsi('26242'H), "1234", c_ApnInet46, valueof(t_EuaIPv4Dynv6Dyn)));
ctx.pco_req := valueof(ts_PCO_IPv6_DNS);
f_pdp_ctx_act(ctx);
f_send_gtpu(ctx, f_icmpv6_rs_for_pdp(ctx));
f_wait_rtr_adv(ctx);
f_send_gtpu(ctx, f_gen_icmpv6_neigh_solicit_for_pdp(ctx));
var OCT16 dns1_addr := f_PCO_extract_proto(ctx.pco_neg, '0003'O);
var OCT16 saddr_glob := f_ipv6_global(ctx.eua.endUserAddress.endUserAddressIPv4andIPv6.ipv6_address);
var OCT16 saddr_wrong := f_ipv6_mangle(saddr_glob);
f_send_gtpu(ctx, f_gen_icmpv6_echo(saddr_wrong, dns1_addr));
f_wait_gtpu_fail(ctx);
f_pdp_ctx_del(ctx, '1'B);
f_shutdown_helper();
}
/* Validate if different clients (pdp ctx) can reach one another through GGSN. */
testcase TC_pdp46_clients_interact() runs on GT_CT {
f_init();
var PdpContext ctxA := valueof(t_DefinePDP(f_rnd_imsi('26242'H), "1234", c_ApnInet46, valueof(t_EuaIPv4Dynv6Dyn)));
var PdpContext ctxB := valueof(t_DefinePDP(f_rnd_imsi('26242'H), "1234", c_ApnInet46, valueof(t_EuaIPv4Dynv6Dyn)));
f_pdp_ctx_act(ctxA);
f_send_gtpu(ctxA, f_icmpv6_rs_for_pdp46(ctxA));
f_wait_rtr_adv(ctxA);
f_send_gtpu(ctxA, f_gen_icmpv6_neigh_solicit_for_pdp46(ctxA));
f_pdp_ctx_act(ctxB);
f_send_gtpu(ctxB, f_icmpv6_rs_for_pdp46(ctxB));
f_wait_rtr_adv(ctxB);
f_send_gtpu(ctxB, f_gen_icmpv6_neigh_solicit_for_pdp46(ctxB));
var OCT16 addrA_ll := f_ipv6_link_local(ctxA.eua.endUserAddress.endUserAddressIPv4andIPv6.ipv6_address);
var OCT16 addrB_ll := f_ipv6_link_local(ctxB.eua.endUserAddress.endUserAddressIPv4andIPv6.ipv6_address);
var OCT16 addrA_glob := f_ipv6_global(ctxA.eua.endUserAddress.endUserAddressIPv4andIPv6.ipv6_address);
var OCT16 addrB_glob := f_ipv6_global(ctxB.eua.endUserAddress.endUserAddressIPv4andIPv6.ipv6_address);
/* Validate if clients can interact using ll addr. */
f_send_gtpu(ctxA, f_gen_icmpv6_echo(addrA_ll, addrB_ll));
f_wait_gtpu_fail(ctxB);
/* Validate if clients can interact using global addr. */
f_send_gtpu(ctxA, f_gen_icmpv6_echo(addrA_glob, addrB_glob));
f_wait_gtpu_fail(ctxB);
f_pdp_ctx_del(ctxA, '1'B);
f_pdp_ctx_del(ctxB, '1'B);
f_shutdown_helper();
}
/* Test IPv4v6 context activation for dynamic IPv4v6 EUA on a v4-only APN */
testcase TC_pdp46_act_deact_apn4() runs on GT_CT {
const OCT1 cause_accept := '80'O; /* Normal accept cause */
const OCT1 cause_new_pdp_type := '81'O; /* Cause: New PDP type due to network preference */
const OCT1 cause_unknown_pdp := 'DC'O; /* Cause: Unknown PDP address or PDP type */
var CreatePDPContextResponse cpr;
f_init();
var PdpContext ctx46 := valueof(t_DefinePDP(f_rnd_imsi('26242'H), "1234", c_ApnInternet, valueof(t_EuaIPv4Dynv6Dyn)));
cpr := f_pdp_ctx_act(ctx46, (cause_unknown_pdp, cause_new_pdp_type));
if (cpr.cause.causevalue == cause_new_pdp_type) {
/* 3GPP TS 23.060 sec 9.2.1: "If the MS requests PDP type IPv4v6,
* but the operator preferences dictate the use of a single IP
* version only, the PDP type shall be changed to a single address
* PDP type (IPv4 or IPv6) and a reason cause shall be returned to
* the MS indicating that only the assigned PDP type is allowed. In
* this case, the MS shall not request another PDP context for the
* other PDP type during the existence of the PDP context." */
f_pdp_ctx_del(ctx46, '1'B);
} else {
/* 3GPP TS 23.060 sec 9.2.1 NOTE 5: If the MS requests PDP type
* IPv4v6, and the PDP context is rejected due to "unknown PDP
* type", the MS can attempt to establish dual-stack connectivity
* by performing two PDP context request procedures to activate an
* IPv4 PDP context and an IPv6 PDP context, both to the same APN. A
* typical MS first attempts v4v6, and if rejected, then tries v4
* and v6 separetly */
var PdpContext ctx4 := valueof(t_DefinePDP(f_rnd_imsi('26242'H), "1234", c_ApnInternet, valueof(t_EuaIPv4Dyn)));
f_pdp_ctx_act(ctx4, cause_accept); /* Normal accept cause */
var PdpContext ctx6 := valueof(t_DefinePDP(f_rnd_imsi('26242'H), "1234", c_ApnInternet, valueof(t_EuaIPv6Dyn)));
f_pdp_ctx_act(ctx6, cause_unknown_pdp); /* Cause: Unknown PDP address or PDP type */
f_pdp_ctx_del(ctx4, '1'B);
}
f_shutdown_helper();
}
/* Validate if 2nd CtxCreateReq with increased Recovery IE causes ggsn to drop 1st one (while keeping 2nd one). */
testcase TC_pdp_act2_recovery() runs on GT_CT {
var Gtp1cUnitdata ud;
var default d;
var boolean ctxA_deleted := false;
var boolean ctxB_created := false;
f_init();
var PdpContext ctxA := valueof(t_DefinePDP(f_rnd_imsi('26242'H), "1234", c_ApnInternet, valueof(t_EuaIPv4Dyn)));
var PdpContext ctxB := valueof(t_DefinePDP(f_rnd_imsi('26242'H), "1234", c_ApnInternet, valueof(t_EuaIPv4Dyn)));
f_pdp_ctx_act(ctxA);
g_restart_ctr := int2oct((oct2int(g_restart_ctr) + 1) mod 256, 1);
log("sending 2nd CreatePDP (recovery increased)");
f_send_gtpc(ts_GTPC_CreatePDP(g_peer_c, g_c_seq_nr, ctxB.imsi, g_restart_ctr,
ctxB.teid, ctxB.teic, ctxB.nsapi, ctxB.eua, ctxB.apn,
g_sgsn_ip_c, g_sgsn_ip_u, ctxB.msisdn, ctxB.pco_req));
T_default.start;
d := activate(pingpong());
alt {
[] GTPC.receive(tr_GTPC_MsgType(g_peer_c, createPDPContextResponse, ctxB.teic)) -> value ud {
f_handle_create_req(ctxB, ud);
if (not ctxB_created) {
ctxB_created := true;
setverdict(pass);
} else {
setverdict(fail, "Repeated createPDPContextResponse(ctxB)");
}
if (not ctxA_deleted) {
repeat;
}
}
[] GTPC.receive(tr_GTPC_MsgType(g_peer_c, deletePDPContextRequest, ctxA.teic)) -> value ud {
if (ispresent(ud.gtpc.gtpc_pdu.deletePDPContextRequest.tearDownIndicator)) {
setverdict(pass);
} else {
setverdict(fail);
}
if (not ctxA_deleted) {
ctxA_deleted := true;
setverdict(pass);
} else {
setverdict(fail, "Repeated deletePDPContextRequest(ctxA)");
}
if (not ctxB_created) {
repeat;
}
}
[] GTPC.receive(tr_GTPC_MsgType(g_peer_c, deletePDPContextRequest, ctxB.teic)) -> value ud {
setverdict(fail, "GGSN dropping still valid pdp ctx");
}
}
deactivate(d);
T_default.stop;
f_pdp_ctx_del(ctxB, '1'B);
f_shutdown_helper();
}
/* Send a duplicate echo req. osmo-ggsn maintains a queue for sent
responses (60 seconds): If same delete req is sent and duplicate is
detected, saved duplicate response should be sent back. */
testcase TC_act_deact_retrans_duplicate() runs on GT_CT {
f_init();
var PdpContext ctx := valueof(t_DefinePDP(f_rnd_imsi('26242'H), "1234", c_ApnInternet, valueof(t_EuaIPv4Dyn)));
f_pdp_ctx_act(ctx);
f_pdp_ctx_del(ctx, '1'B);
/* leave some time in between to make sure retransmit response queue keeps packets for a while */
f_sleep(1.0);
/* g_c_seq_nr was increased during f_pdp_ctx_del(), we want a
duplicate. If it was not a duplicate, osmo-ggsn would answer
with a failure since that PDP ctx was already deleted. */
if (g_c_seq_nr == 0) {
g_c_seq_nr := 65535;
} else {
g_c_seq_nr := g_c_seq_nr - 1;
}
f_pdp_ctx_del(ctx, '1'B, expect_diameter := false);
/* Now send a new pdp ctx del (increased seqnum). It should fail with cause "non-existent": */
var OCT1 cause_nonexistent := 'C0'O;
f_pdp_ctx_del(ctx, '1'B, cause_nonexistent, expect_diameter := false);
f_shutdown_helper();
}
/* Activate PDP context + trigger Recovery procedure through EchoResp */
testcase TC_pdp_act_restart_ctr_echo() runs on GT_CT {
var Gtp1cUnitdata ud;
g_use_echo_intval := 5;
timer T_echo;
f_init();
var PdpContext ctx := valueof(t_DefinePDP(f_rnd_imsi('26242'H), "1234", c_ApnInternet, valueof(t_EuaIPv4Dyn)));
f_pdp_ctx_act(ctx);
/* Wait to receive echo request and send initial Restart counter */
T_echo.start(int2float(g_use_echo_intval) + 1.0);
alt {
[] GTPC.receive(tr_GTPC_PING(?)) -> value ud {
var uint16_t seq := oct2int(ud.gtpc.opt_part.sequenceNumber);
GTPC.send(ts_GTPC_PONG(ud.peer, seq, g_restart_ctr));
}
[] T_echo.timeout {
Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail,
"Timeout waiting for ping");
}
}
T_echo.stop;
/* Wait to receive second echo request and send incremented Restart
counter. This will fake a restarted SGSN, and pdp ctx allocated
should be released by GGSN */
g_restart_ctr := int2oct((oct2int(g_restart_ctr) + 1) mod 256, 1);
T_echo.start(int2float(g_use_echo_intval) + 1.0);
alt {
[] GTPC.receive(tr_GTPC_PING(?)) -> value ud {
var uint16_t seq := oct2int(ud.gtpc.opt_part.sequenceNumber);
GTPC.send(ts_GTPC_PONG(ud.peer, seq, g_restart_ctr));
}
[] T_echo.timeout {
Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail,
"Timeout waiting for ping");
}
}
T_echo.stop;
f_pdp_ctx_exp_del_req(ctx, omit, true);
f_shutdown_helper();
}
/* Test creation, user plane and deletion of big amount (1000) of concurrent PDP context */
testcase TC_lots_of_concurrent_pdp_ctx() runs on GT_CT {
var Gtp1cUnitdata udc;
var Gtp1uUnitdata udu;
const integer num_ctx := 1000;
var PdpContext ctx[num_ctx];
timer T_next := 0.01;
var integer next_req_ctx := 0;
var integer rx_resp_ctx := 0;
var integer rx_pong := 0;
var OCT4 dns1_addr;
var OCT4 saddr;
var integer teic;
var integer idx;
f_init();
for (var integer i := 0; i < num_ctx; i := i + 1) {
ctx[i] := valueof(t_DefinePDP(f_rnd_imsi('26242'H), "1234" & int2str(f_rnd_int(4294967296)), c_ApnInternet, valueof(t_EuaIPv4Dyn)));
ctx[i].teic := int2oct(i+1, 4); /* +1: skip TEIC=0 */
ctx[i].teid := int2oct(i+1, 4); /* +1: skip TEID=0 */
ctx[i].pco_req := valueof(ts_PCO_IPv4_DNS_CONT);
}
T_default.start(60.0);
T_next.start;
alt {
[Gx_PROC.checkstate("Connected")] as_DIA_Gx_CCR(INITIAL_REQUEST) { repeat; }
[Gy_PROC.checkstate("Connected")] as_DIA_Gy_CCR(omit, INITIAL_REQUEST) { repeat; }
[] pingpong();
[] T_next.timeout {
f_send_gtpc(ts_GTPC_CreatePDP(g_peer_c, g_c_seq_nr, ctx[next_req_ctx].imsi, g_restart_ctr,
ctx[next_req_ctx].teid, ctx[next_req_ctx].teic, ctx[next_req_ctx].nsapi,
ctx[next_req_ctx].eua, ctx[next_req_ctx].apn, g_sgsn_ip_c, g_sgsn_ip_u,
ctx[next_req_ctx].msisdn, ctx[next_req_ctx].pco_req, ctx[next_req_ctx].ratType,
ctx[next_req_ctx].uli, ctx[next_req_ctx].charging_char, ctx[next_req_ctx].imeisv,
ctx[next_req_ctx].ms_tz));
next_req_ctx := next_req_ctx + 1;
if (next_req_ctx < num_ctx) {
T_next.start;
}
repeat;
}
[] GTPC.receive(tr_GTPC_MsgType(g_peer_c, createPDPContextResponse, ?)) -> value udc {
teic := oct2int(udc.gtpc.teid);
if (not match(teic, (1 .. num_ctx))) {
Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail,
"Rx Unexpected TEIC");
}
idx := teic - 1;
f_handle_create_req(ctx[idx], udc);
rx_resp_ctx := rx_resp_ctx + 1;
dns1_addr := f_PCO_extract_proto(ctx[idx].pco_neg, '000d'O);
saddr := ctx[idx].eua.endUserAddress.endUserAddressIPv4.ipv4_address;
f_send_gtpu(ctx[idx], f_gen_icmpv4_echo(saddr, dns1_addr));
repeat;
}
[] GTPU.receive(tr_GTPU_GPDU(g_peer_u, ?)) -> value udu {
var octetstring gpdu := udu.gtpu.gtpu_IEs.g_PDU_IEs.data;
var IPv4_packet ip4 := f_IPv4_dec(gpdu);
if (ip4.header.ver != 4) {
repeat;
}
var PDU_ICMP icmp4 := f_dec_PDU_ICMP(ip4.payload);
if (not match(icmp4, (tr_ICMPv4_ERP, tr_ICMPv4_DU))) {
repeat;
}
rx_pong := rx_pong + 1;
if (rx_pong < num_ctx) {
repeat;
}
setverdict(pass);
}
[] GTPC.receive { Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, "Rx Unexpected GTPC"); }
[] GTPU.receive { Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, "Rx Unexpected GTPU"); }
}
/* Let's close them now: */
next_req_ctx := 0;
rx_resp_ctx := 0;
T_next.start;
alt {
[Gx_PROC.checkstate("Connected")] as_DIA_Gx_CCR(TERMINATION_REQUEST) { repeat; }
[Gy_PROC.checkstate("Connected")] as_DIA_Gy_CCR(omit, TERMINATION_REQUEST) { repeat; }
[] pingpong();
[] T_next.timeout {
f_send_gtpc(ts_GTPC_DeletePDP(g_peer_c, g_c_seq_nr, ctx[next_req_ctx].teic_remote, ctx[next_req_ctx].nsapi, '1'B));
next_req_ctx := next_req_ctx + 1;
if (next_req_ctx < num_ctx) {
T_next.start;
}
repeat;
}
[] GTPC.receive(tr_GTPC_MsgType(g_peer_c, deletePDPContextResponse, ?)) -> value udc {
teic := oct2int(udc.gtpc.teid);
if (not match(teic, (1 .. num_ctx))) {
Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail,
"Rx Unexpected TEIC");
}
rx_resp_ctx := rx_resp_ctx + 1;
if (rx_resp_ctx < num_ctx) {
repeat;
}
setverdict(pass);
}
[] GTPC.receive { Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, "Rx Unexpected GTPC"); }
[] GTPU.receive { Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, "Rx Unexpected GTPU"); }
}
T_next.stop;
T_default.stop;
f_shutdown_helper();
}
/* Test callocation of PDP contexts until reaching addr pool exhaustion */
type record of OCT4 TEIClist;
testcase TC_addr_pool_exhaustion() runs on GT_CT {
var Gtp1cUnitdata udc;
var Gtp1uUnitdata udu;
var PdpContext ctx;
timer T_next := 0.005;
var integer next_req_ctx := 0;
var integer rx_resp_ctx := 0;
var integer num_ctx;
var boolean cont_req := true;
var CreatePDPContextResponse cpr;
var TEIClist teic_list := {};
var integer teic;
f_init();
T_default.start(120.0);
T_next.start;
alt {
[Gx_PROC.checkstate("Connected")] as_DIA_Gx_CCR(INITIAL_REQUEST) { repeat; }
[Gy_PROC.checkstate("Connected")] as_DIA_Gy_CCR(omit, INITIAL_REQUEST) { repeat; }
[] pingpong();
[] T_next.timeout {
if (cont_req) {
if (next_req_ctx - rx_resp_ctx < 100) { /* if we have too many in progress, wait a bit to continue */
ctx := valueof(t_DefinePDP(f_rnd_imsi('26242'H), "1234" & int2str(f_rnd_int(4294967296)), c_ApnInternet, valueof(t_EuaIPv4Dyn)));
ctx.nsapi := '0001'B;
ctx.teic := int2oct(next_req_ctx+1, 4); /* +1: skip TEIC=0 */
ctx.teid := int2oct(next_req_ctx+1, 4); /* +1: skip TEID=0 */
f_send_gtpc(ts_GTPC_CreatePDP(g_peer_c, g_c_seq_nr, ctx.imsi, g_restart_ctr,
ctx.teid, ctx.teic, ctx.nsapi,
ctx.eua, ctx.apn, g_sgsn_ip_c, g_sgsn_ip_u,
ctx.msisdn, ctx.pco_req, ctx.ratType,
ctx.uli, ctx.charging_char, ctx.imeisv,
ctx.ms_tz));
next_req_ctx := next_req_ctx + 1;
}
T_next.start;
}
repeat;
}
[] GTPC.receive(tr_GTPC_MsgType(g_peer_c, createPDPContextResponse, ?)) -> value udc {
cpr := udc.gtpc.gtpc_pdu.createPDPContextResponse;
if (cpr.cause.causevalue == '80'O) {
teic_list := teic_list & {cpr.teidControlPlane.teidControlPlane};
} else {
if (cont_req == true) {
num_ctx := rx_resp_ctx;
log("Successfully created ", num_ctx, " PDP contexts before exhausting the pool");
setverdict(pass);
}
cont_req := false;
}
rx_resp_ctx := rx_resp_ctx + 1;
if (not cont_req and next_req_ctx == rx_resp_ctx) {
break;
} else {
repeat;
}
}
[] GTPC.receive { Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, "Rx Unexpected GTPC"); }
[] GTPU.receive { Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, "Rx Unexpected GTPU"); }
}
/* Let's close them now: */
next_req_ctx := 0;
rx_resp_ctx := 0;
T_next.start;
alt {
[Gx_PROC.checkstate("Connected")] as_DIA_Gx_CCR(TERMINATION_REQUEST) { repeat; }
[Gy_PROC.checkstate("Connected")] as_DIA_Gy_CCR(omit, TERMINATION_REQUEST) { repeat; }
[] pingpong();
[] T_next.timeout {
f_send_gtpc(ts_GTPC_DeletePDP(g_peer_c, g_c_seq_nr, teic_list[next_req_ctx], '0001'B, '1'B));
next_req_ctx := next_req_ctx + 1;
if (next_req_ctx < num_ctx) {
T_next.start;
}
repeat;
}
[] GTPC.receive(tr_GTPC_MsgType(g_peer_c, deletePDPContextResponse, ?)) -> value udc {
teic := oct2int(udc.gtpc.teid);
if (not match(teic, (1 .. num_ctx))) {
Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail,
"Rx Unexpected TEIC");
}
rx_resp_ctx := rx_resp_ctx + 1;
if (rx_resp_ctx < num_ctx) {
repeat;
}
setverdict(pass);
}
[] GTPC.receive { Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, "Rx Unexpected GTPC"); }
[] GTPU.receive { Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, "Rx Unexpected GTPU"); }
}
T_next.stop;
T_default.stop;
f_shutdown_helper();
}
/* Test charging over Gy interface. */
testcase TC_gy_charging_cc_time() runs on GT_CT {
var default d;
g_gy_validity_time := 3; /* Grant access for 3 seconds, needs to be re-validated afterwards */
f_init();
var PdpContext ctx := valueof(t_DefinePDP(f_rnd_imsi('26242'H), "1234", c_ApnInternet, valueof(t_EuaIPv4Dyn)));
ctx.pco_req := valueof(ts_PCO_IPv4_DNS_CONT);
f_pdp_ctx_act(ctx);
var OCT4 dns1_addr := f_PCO_extract_proto(ctx.pco_neg, '000d'O);
/* Send some UL traffic: */
var OCT4 saddr := ctx.eua.endUserAddress.endUserAddressIPv4.ipv4_address;
f_send_gtpu(ctx, f_gen_icmpv4_echo(saddr, dns1_addr));
f_wait_icmp4_echo_reply(ctx);
T_default.start(10.0);
d := activate(pingpong());
g_gy_validity_time := 2;
/* First update reports octests/pkt on both UL/DL (see icmp ping-pong above) */
as_DIA_Gy_CCR(ctx, UPDATE_REQUEST);
f_validate_gy_cc_report(g_rx_gy, VALIDITY_TIME, (3..4), 28, 28);
/* Second update: 0 ul/dl pkt/octet should be reported, since nothing was sent */
as_DIA_Gy_CCR(ctx, UPDATE_REQUEST);
f_validate_gy_cc_report(g_rx_gy, VALIDITY_TIME, (2..3), 0, 0);
/* Third update: make sure report contains again octets/pkts for both UL/DL: */
f_send_gtpu(ctx, f_gen_icmpv4_echo(saddr, dns1_addr));
f_wait_icmp4_echo_reply(ctx);
f_send_gtpu(ctx, f_gen_icmpv4_echo(saddr, dns1_addr));
f_wait_icmp4_echo_reply(ctx);
as_DIA_Gy_CCR(ctx, UPDATE_REQUEST);
f_validate_gy_cc_report(g_rx_gy, VALIDITY_TIME, (2..3), 56, 56);
/* Let the CCA reach the GGSN */
f_sleep(0.5);
deactivate(d);
T_default.stop;
/* Send some data and validate it is reported in the TERMINATION_REQUEST
* (triggered by PFCP Session Deletion Response): */
f_send_gtpu(ctx, f_gen_icmpv4_echo(saddr, dns1_addr));
f_wait_icmp4_echo_reply(ctx);
f_pdp_ctx_del(ctx, '1'B);
f_validate_gy_cc_report(g_rx_gy, FINAL, (0..2), 28, 28);
f_shutdown_helper();
}
/* Test Volume-Quota-Thresold AVP triggers request before Validity-Time */
testcase TC_gy_charging_volume_quota_threshold() runs on GT_CT {
var default d;
timer Tout;
g_gy_volume_threshold := 1000; /* Will make a trigger when we send bigger payload below */
g_gy_validity_time := 8; /* Grant access for 8 seconds, needs to be re-validated afterwards */
f_init();
var float tout_sec := int2float(g_gy_validity_time) / 2.0;
var PdpContext ctx := valueof(t_DefinePDP(f_rnd_imsi('26242'H), "1234", c_ApnInternet, valueof(t_EuaIPv4Dyn)));
ctx.pco_req := valueof(ts_PCO_IPv4_DNS_CONT);
f_pdp_ctx_act(ctx);
var OCT4 dns1_addr := f_PCO_extract_proto(ctx.pco_neg, '000d'O);
T_default.start(40.0);
d := activate(pingpong());
/* Send some UL traffic: */
var octetstring payload := f_rnd_octstring(1200);
var OCT4 saddr := ctx.eua.endUserAddress.endUserAddressIPv4.ipv4_address;
f_send_gtpu(ctx, f_gen_icmpv4_echo(saddr, dns1_addr, payload));
f_wait_icmp4_echo_reply(ctx);
/* ICMP Req generates one report: */
Tout.start(tout_sec);
alt {
[] as_DIA_Gy_CCR(ctx, UPDATE_REQUEST);
[] Tout.timeout {
Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail,
"TImeout waiting for Gy UPDATE triggered by Volume-Quota-Threshold");
}
}
f_validate_gy_cc_report(g_rx_gy, THRESHOLD, (0..6), 0, (1200..1400));
/* ICMP Resp (echo back) generates one report: */
as_DIA_Gy_CCR(ctx, UPDATE_REQUEST);
f_validate_gy_cc_report(g_rx_gy, THRESHOLD, (0..1), (1200..1400), 0);
/* Second update: 0 ul/dl pkt/octet should be reported, since nothing was sent */
as_DIA_Gy_CCR(ctx, UPDATE_REQUEST);
f_validate_gy_cc_report(g_rx_gy, VALIDITY_TIME, (8..9), 0, 0);
/* Let the CCA reach the GGSN */
f_sleep(0.5);
deactivate(d);
T_default.stop;
f_pdp_ctx_del(ctx, '1'B);
f_validate_gy_cc_report(g_rx_gy, FINAL, (0..2), 0, 0);
f_shutdown_helper();
}
control {
execute(TC_pdp4_act_deact());
execute(TC_pdp4_act_deact_ipcp());
execute(TC_pdp4_act_deact_ipcp_pap_broken());
execute(TC_pdp4_act_deact_pcodns());
execute(TC_pdp4_act_deact_gtpu_access());
execute(TC_pdp4_act_deact_gtpu_access_wrong_saddr());
execute(TC_pdp4_act_deact_gtpu_access_ipv6_apn4());
execute(TC_pdp4_clients_interact_with_txseq());
execute(TC_pdp4_clients_interact_without_txseq());
execute(TC_pdp4_act_deact_with_single_dns());
execute(TC_pdp4_act_deact_with_separate_dns());
execute(TC_pdp4_act_update_teic());
execute(TC_pdp4_act_update_teid());
execute(TC_pdp6_act_deact());
execute(TC_pdp6_act_deact_pcodns());
execute(TC_pdp6_act_deact_icmp6());
execute(TC_pdp6_act_deact_gtpu_access());
execute(TC_pdp6_act_deact_gtpu_access_wrong_ll_saddr());
execute(TC_pdp6_act_deact_gtpu_access_wrong_global_saddr());
execute(TC_pdp6_act_deact_gtpu_access_ipv4_apn6());
execute(TC_pdp6_clients_interact());
execute(TC_pdp46_act_deact());
execute(TC_pdp46_act_deact_ipcp());
execute(TC_pdp46_act_deact_icmp6());
execute(TC_pdp46_act_deact_pcodns4());
execute(TC_pdp46_act_deact_pcodns6());
execute(TC_pdp46_act_deact_gtpu_access());
execute(TC_pdp46_act_deact_gtpu_access_wrong_saddr_ipv4());
execute(TC_pdp46_act_deact_gtpu_access_wrong_ll_saddr_ipv6());
execute(TC_pdp46_act_deact_gtpu_access_wrong_global_saddr_ipv6());
execute(TC_pdp46_clients_interact());
execute(TC_pdp46_act_deact_apn4());
execute(TC_echo_req_resp());
execute(TC_echo_req_resp_gtpu());
execute(TC_pdp_act2_recovery());
execute(TC_act_deact_retrans_duplicate());
execute(TC_pdp_act_restart_ctr_echo());
execute(TC_lots_of_concurrent_pdp_ctx());
/* Keep at the end, crashes older osmo-ggsn versions (OS#5469): */
execute(TC_addr_pool_exhaustion());
/* open5gs specific tests: */
if (m_ggsn_impl == GGSN_IMPL_OPEN5GS) {
execute(TC_gy_charging_cc_time());
execute(TC_gy_charging_volume_quota_threshold());
}
}
}
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