GGSN_Tests: Get it up to PDP Ctx ACT, GTP-U and Ctx DEACT
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@ -1,6 +1,7 @@
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module GGSN_Tests {
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import from General_Types all;
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import from Osmocom_Types all;
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import from IPL4asp_PortType all;
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import from IPL4asp_Types all;
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import from GTP_CodecPort all;
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@ -14,6 +15,26 @@ module GGSN_Tests {
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const charstring g_bind_ip_c := "127.23.42.1";
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const charstring g_bind_ip_u := g_bind_ip_c;
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type set PdpContext {
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hexstring imsi,
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octetstring msisdn optional,
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octetstring apn,
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EndUserAddress eua,
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BIT4 nsapi,
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/* TEI (Data) local side */
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OCT4 teid,
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/* TEI (Control) local side */
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OCT4 teic,
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/* TEI (Data) remote side */
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OCT4 teid_remote,
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/* TEI (Control) remote side */
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OCT4 teic_remote,
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/* next to-be-sent GTP-C sequence number */
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uint16_t c_seq_nr,
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/* next to-be-sent GTP-U sequence number */
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uint16_t d_seq_nr
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}
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type component GT_CT {
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port GTPC_PT GTPC;
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port GTPU_PT GTPU;
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@ -23,7 +44,8 @@ module GGSN_Tests {
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var OCT4 g_sgsn_ip_c := '7f172a01'O;
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var OCT4 g_sgsn_ip_u := '7f172a01'O;
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/* FIXME: parse remName from config file */
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var GtpPeer g_peer := { connId := 0, remName := "127.0.0.6", remPort := GTP1C_PORT };
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var GtpPeer g_peer_c := { connId := 0, remName := "127.0.0.6", remPort := GTP1C_PORT };
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var GtpPeer g_peer_u := { connId := 0, remName := "127.0.0.6", remPort := GTP1U_PORT };
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timer T_default := 3.0;
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}
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@ -32,10 +54,11 @@ module GGSN_Tests {
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map(self:GTPC, system:GTPC);
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res := GTP_CodecPort_CtrlFunct.f_IPL4_listen(GTPC, g_bind_ip_c, GTP1C_PORT, {udp:={}});
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log("GTP1C ConnectionID: ", res.connId);
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g_peer.connId := res.connId;
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g_peer_c.connId := res.connId;
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map(self:GTPU, system:GTPU);
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GTP_CodecPort_CtrlFunct.f_GTPU_listen(GTPU, g_bind_ip_u, GTP1U_PORT, {udp:={}});
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res := GTP_CodecPort_CtrlFunct.f_GTPU_listen(GTPU, g_bind_ip_u, GTP1U_PORT, {udp:={}});
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g_peer_u.connId:= res.connId;
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}
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/* generalized GTP-C receive template */
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@ -59,7 +82,7 @@ module GGSN_Tests {
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}
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/* generalized GTP-C send template */
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template PDU_GTPC ts_GTP1C_PDU(OCT1 msg_type, OCT4 teid, GTPC_PDUs pdu) := {
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template PDU_GTPC ts_GTP1C_PDU(OCT1 msg_type, OCT4 teid, GTPC_PDUs pdu, uint16_t seq_nr) := {
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/* N-PDU Number flag (PN) shall be set to '0'. A GTP-C receiver shall not return an
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* error if this flag is set to '1'. */
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pn_bit := '0'B,
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@ -75,7 +98,7 @@ module GGSN_Tests {
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lengthf := 0, /* we assume encoder overwrites this */
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teid := teid,
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opt_part := {
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sequenceNumber := '9801'O,
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sequenceNumber := int2oct(seq_nr, 2),
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npduNumber := '00'O,
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nextExtHeader := '00'O,
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gTPC_extensionHeader_List := omit
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@ -109,9 +132,9 @@ module GGSN_Tests {
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}
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/* master template for senidng a GTP-C echo response */
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template Gtp1cUnitdata ts_GTPC_PONG(GtpPeer peer, OCT1 rest_ctr) := {
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template Gtp1cUnitdata ts_GTPC_PONG(GtpPeer peer, uint16_t seq, OCT1 rest_ctr) := {
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peer := peer,
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gtpc := ts_GTP1C_PDU(echoResponse, '00000000'O, valueof(ts_EchoRespPDU(rest_ctr)))
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gtpc := ts_GTP1C_PDU(echoResponse, '00000000'O, valueof(ts_EchoRespPDU(rest_ctr)), seq)
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}
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template EndUserAddress t_EuaIPv4(template OCT4 ip_addr) := {
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@ -259,7 +282,8 @@ module GGSN_Tests {
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}
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}
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template Gtp1cUnitdata ts_GTPC_CreatePDP(GtpPeer peer, hexstring imsi, OCT1 restart_ctr, OCT4 teid_data,
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template Gtp1cUnitdata ts_GTPC_CreatePDP(GtpPeer peer, uint16_t seq, hexstring imsi,
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OCT1 restart_ctr, OCT4 teid_data,
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OCT4 teid_ctrl, BIT4 nsapi, EndUserAddress eua,
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octetstring apn, octetstring sgsn_ip_sign,
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octetstring sgsn_ip_data, octetstring msisdn) := {
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@ -267,13 +291,15 @@ module GGSN_Tests {
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gtpc := ts_GTP1C_PDU(createPDPContextRequest, '00000000'O,
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valueof(ts_CreatePdpPDU(imsi, restart_ctr, teid_data, teid_ctrl,
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nsapi, eua, apn, sgsn_ip_sign,
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sgsn_ip_data, msisdn)))
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sgsn_ip_data, msisdn)), seq)
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}
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function f_teardown_ind_IE(in template BIT1 ind) return template TearDownInd {
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if (isvalue(ind)) {
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/*
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if (not isvalue(ind)) {
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return omit;
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}
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*/
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var TearDownInd ret := {
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type_gtpc := '13'O,
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tdInd := valueof(ind),
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@ -300,11 +326,11 @@ module GGSN_Tests {
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}
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}
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template Gtp1cUnitdata ts_GTPC_DeletePDP(GtpPeer peer, OCT4 teid, BIT4 nsapi,
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template BIT1 teardown_ind) := {
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template Gtp1cUnitdata ts_GTPC_DeletePDP(GtpPeer peer, uint16_t seq, OCT4 teid,
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BIT4 nsapi, template BIT1 teardown_ind) := {
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peer := peer,
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gtpc := ts_GTP1C_PDU(deletePDPContextRequest, teid,
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valueof(ts_DeletePdpPDU(nsapi, teardown_ind)))
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valueof(ts_DeletePdpPDU(nsapi, teardown_ind)), seq)
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}
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@ -327,15 +353,14 @@ module GGSN_Tests {
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}
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/* generalized GTP-U send template */
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template PDU_GTPU ts_GTP1U_PDU(OCT1 msg_type, OCT4 teid, GTPU_IEs ies,
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template GTPU_Header_optional_part opt := omit) := {
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template PDU_GTPU ts_GTP1U_PDU(OCT1 msg_type, uint16_t seq, OCT4 teid, GTPU_IEs ies) := {
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/* N-PDU Number flag (PN): the GTP-U header contains a meaningful N-PDU Number field if the PN
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* flag is set to 1. */
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pn_bit := '0'B, /* we assume the encoder overwrites this if an optional part is given */
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/* If the Sequence Number flag (S) is set to '1' the sequence number field is present and
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* meaningful otherwise it is set to '0'. For GTP-U messages Echo Request, Echo Response,
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* Error Indication and Supported Extension Headers Notification, the S flag shall be set to '1'. */
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s_bit := '0'B, /* we assume the encoder overwrites this if an optional part is given */
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s_bit := '1'B, /* we assume the encoder overwrites this if an optional part is given */
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/* Extension header presence */
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e_bit := '0'B,
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spare := '0'B,
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@ -346,7 +371,12 @@ module GGSN_Tests {
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messageType := msg_type,
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lengthf := 0, /* we assume encoder overwrites this */
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teid := teid,
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opt_part := opt,
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opt_part := {
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sequenceNumber := int2oct(seq, 2),
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npduNumber := '00'O,
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nextExtHeader := '00'O,
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gTPU_extensionHeader_List := omit
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},
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gtpu_IEs := ies
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}
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@ -370,43 +400,94 @@ module GGSN_Tests {
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}
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/* master template for sending a GTP-U echo response */
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template Gtp1uUnitdata ts_GTPU_PONG(GtpPeer peer, OCT1 rest_ctr) := {
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template Gtp1uUnitdata ts_GTPU_PONG(GtpPeer peer, uint16_t seq, OCT1 rest_ctr) := {
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peer := peer,
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gtpu := ts_GTP1U_PDU(echoResponse, '00000000'O, valueof(ts_UEchoRespPDU(rest_ctr)))
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gtpu := ts_GTP1U_PDU(echoResponse, seq, '00000000'O, valueof(ts_UEchoRespPDU(rest_ctr)))
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}
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template PDU_GTPU ts_GTP1U_GPDU(OCT4 teid, octetstring data) :=
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ts_GTP1U_PDU('FF'O, teid, { g_PDU_IEs := { data := data }});
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/* master template for sending a GTP-U user plane data */
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template Gtp1uUnitdata ts_GTP1U_GPDU(GtpPeer peer, uint16_t seq, OCT4 teid, octetstring data) := {
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peer := peer,
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gtpu := ts_GTP1U_PDU('FF'O, seq, teid, { g_PDU_IEs := { data := data }})
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}
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/* Altstep implementing responses to any incoming echo requests */
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altstep pingpong() runs on GT_CT {
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var Gtp1cUnitdata ud;
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var Gtp1uUnitdata udu;
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[] GTPC.receive(tr_GTPC_PING(?)) -> value ud {
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GTPC.send(ts_GTPC_PONG(ud.peer, '00'O));
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var uint16_t seq := oct2int(ud.gtpc.opt_part.sequenceNumber);
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GTPC.send(ts_GTPC_PONG(ud.peer, seq, '00'O));
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repeat;
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};
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[] GTPU.receive(tr_GTPU_PING(?)) -> value udu {
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GTPU.send(ts_GTPU_PONG(udu.peer, '00'O));
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var uint16_t seq := oct2int(udu.gtpu.opt_part.sequenceNumber);
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GTPU.send(ts_GTPU_PONG(udu.peer, seq, '00'O));
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};
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[] T_default.timeout { setverdict(fail); };
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}
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/* 'internet' in DNS encoding */
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template octetstring t_ApnInternet := '08696E7465726E6574'O;
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function f_pdp_ctx_act(hexstring imsi, BIT4 nsapi, EndUserAddress eua, octetstring apn, octetstring msisdn) runs on GT_CT {
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/* return random integer between 0 and max */
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function f_rnd_int(integer max) return integer {
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return float2int(rnd()*int2float(max));
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}
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/* return random NSAPI */
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function f_rnd_nsapi() return BIT4 {
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return int2bit(f_rnd_int(16), 4);
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}
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/* return random TEI[DC] */
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function f_rnd_tei() return OCT4 {
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return int2oct(f_rnd_int(4294967296), 4);
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}
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/* define an (internal) representation of a PDP context */
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template PdpContext t_DefinePDP(hexstring imsi, octetstring msisdn, octetstring apn,
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EndUserAddress eua) := {
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imsi := imsi,
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msisdn := msisdn,
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nsapi := f_rnd_nsapi(),
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apn := apn,
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eua := eua,
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teid := f_rnd_tei(),
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teic := f_rnd_tei(),
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d_seq_nr := 0,
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c_seq_nr := 0
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}
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/* send GTP-C for a given context and increment sequence number */
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function f_send_gtpc(inout PdpContext ctx, in template Gtp1cUnitdata data) runs on GT_CT {
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GTPC.send(data);
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ctx.c_seq_nr := ctx.c_seq_nr + 1;
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}
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/* send GTP-U for a given context and increment sequence number */
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function f_send_gtpu(inout PdpContext ctx, in template Gtp1uUnitdata data) runs on GT_CT {
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GTPU.send(data);
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ctx.d_seq_nr := ctx.d_seq_nr + 1;
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}
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/* send a PDP context activation */
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function f_pdp_ctx_act(inout PdpContext ctx) runs on GT_CT {
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var Gtp1cUnitdata ud;
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var octetstring teid := '01020304'O;
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var default d;
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log("sending CreatePDP");
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GTPC.send(ts_GTPC_CreatePDP(g_peer, imsi, g_restart_ctr, teid, teid, nsapi, eua, apn, g_sgsn_ip_c, g_sgsn_ip_u, msisdn));
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f_send_gtpc(ctx, ts_GTPC_CreatePDP(g_peer_c, ctx.c_seq_nr, ctx.imsi, g_restart_ctr,
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ctx.teid, ctx.teic, ctx.nsapi, ctx.eua, ctx.apn,
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g_sgsn_ip_c, g_sgsn_ip_u, ctx.msisdn));
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T_default.start;
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d := activate(pingpong());
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alt {
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[] GTPC.receive(tr_GTPC_MsgType(g_peer, createPDPContextResponse, teid)) -> value ud {
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if (ud.gtpc.gtpc_pdu.createPDPContextResponse.cause.causevalue == '80'O) {
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[] GTPC.receive(tr_GTPC_MsgType(g_peer_c, createPDPContextResponse, ctx.teic)) -> value ud {
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var CreatePDPContextResponse cpr := ud.gtpc.gtpc_pdu.createPDPContextResponse;
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if (cpr.cause.causevalue == '80'O) {
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ctx.teid_remote := cpr.teidDataI.teidDataI;
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ctx.teic_remote := cpr.teidControlPlane.teidControlPlane;
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setverdict(pass);
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} else {
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setverdict(fail);
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@ -414,18 +495,18 @@ module GGSN_Tests {
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}
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}
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deactivate(d);
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T_default.stop;
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}
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function f_pdp_ctx_del(OCT4 teid, BIT4 nsapi, template BIT1 teardown_ind) runs on GT_CT {
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function f_pdp_ctx_del(PdpContext ctx, template BIT1 teardown_ind) runs on GT_CT {
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var Gtp1cUnitdata ud;
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var default d;
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GTPC.send(ts_GTPC_DeletePDP(g_peer, teid, nsapi, teardown_ind));
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f_send_gtpc(ctx, ts_GTPC_DeletePDP(g_peer_c, ctx.c_seq_nr, ctx.teic_remote, ctx.nsapi, teardown_ind));
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T_default.start;
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d := activate(pingpong());
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alt {
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[] GTPC.receive(tr_GTPC_MsgType(g_peer, deletePDPContextResponse, teid)) -> value ud {
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[] GTPC.receive(tr_GTPC_MsgType(g_peer_c, deletePDPContextResponse, ctx.teic)) -> value ud {
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if (ud.gtpc.gtpc_pdu.deletePDPContextResponse.cause.causevalue == '80'O) {
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setverdict(pass);
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} else {
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@ -434,23 +515,28 @@ module GGSN_Tests {
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}
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}
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deactivate(d);
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T_default.stop;
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}
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/* IPv6 router solicitation fe80::2 -> ff02::2 from 02:88:b5:1f:25:59 */
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const octetstring c_router_solicit := '6000000000103afffe800000000000000000000000000002ff02000000000000000000000000000285009f2b0000000001010288b51f2559'O;
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/* IPv6 neighbor solicitation fe80::2 -> ff02::1:ff00:2 from 02:88:b5:1f:25:59 */
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const octetstring c_neigh_solicit:= '6000000000203afffe800000000000000000000000000002ff0200000000000000000001ff00000287009f9600000000fe80000000000000000000000000000201010288b51f2559'O;
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testcase TC_activate_pdp4() runs on GT_CT {
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f_init();
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var hexstring imsi := '262420123456789'H;
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var octetstring msisdn := '1234'O;
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f_pdp_ctx_act(imsi, '0010'B, valueof(t_EuaIPv4Dyn), valueof(t_ApnInternet), msisdn);
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var PdpContext ctx := valueof(t_DefinePDP('262420123456789'H, '1234'O, valueof(t_ApnInternet), valueof(t_EuaIPv4Dyn)));
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f_pdp_ctx_act(ctx);
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}
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testcase TC_activate_pdp6() runs on GT_CT {
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f_init();
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var hexstring imsi := '262420123456789'H;
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var octetstring msisdn := '1234'O;
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f_pdp_ctx_act(imsi, '0010'B, valueof(t_EuaIPv6Dyn), valueof(t_ApnInternet), msisdn);
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var PdpContext ctx := valueof(t_DefinePDP('262420123456789'H, '1234'O, valueof(t_ApnInternet), valueof(t_EuaIPv6Dyn)));
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f_pdp_ctx_act(ctx);
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f_send_gtpu(ctx, ts_GTP1U_GPDU(g_peer_u, ctx.d_seq_nr, ctx.teid_remote, c_router_solicit));
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f_send_gtpu(ctx, ts_GTP1U_GPDU(g_peer_u, ctx.d_seq_nr, ctx.teid_remote, c_neigh_solicit));
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f_pdp_ctx_del(ctx, '1'B);
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}
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control {
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execute(TC_activate_pdp4());
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execute(TC_activate_pdp6());
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