WIP: add some early code for generating required RANAP messages
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/* This is just some non-compiling work in progress code to generate the
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* minimum set of RANAP messages that the core network side needs to send
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* towards the RNC */
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int ranap_tx_dt(uint8_t sapi, const uint8_t *nas, unsigned int nas_len)
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{
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RANAP_DirectTransferIEs_t ies;
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RANAP_DirectTransfer_t dt;
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struct msgb *msg;
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int rc;
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memset(&ies, 0, sizeof(ies));
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/* only SAPI optional field shall be present for CN->RNC */
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ies.presenceMask = DIRECTTRANSFERIES_RANAP_SAPI_PRESENT;
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if (sapi == 3)
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ies.sapi = RANAP_SAPI_sapi_3;
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else
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ies.sapi = RANAP_SAPI_sapi_0;
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ies.nas_pdu.buf = nas;
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ies.nas_pdu.size = nas_len;
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rc = ranap_encode_directtransferies(&dt, &ies);
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msg = ranap_generate_initiating_message(RANAP_ProcedureCode_id_DirectTransfer,
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RANAP_Criticality_reject,
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&asn_DEF_RANAP_DirectTransfer,
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&dt);
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/* FIXME: Hand that to RUA or SCCP */
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}
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static const enum RANAP_IntegrityProtectionAlgorithm ip_alg[2] = {
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RANAP_IntegrityProtectionAlgorithm_standard_UMTS_integrity_algorithm_UIA1,
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RANAP_IntegrityProtectionAlgorithm_standard_UMTS_integrity_algorithm_UIA2,
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};
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static const enum RANAP_EncryptionAlgorithm enc_alg[2] = {
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RANAP_EncryptionAlgorithm_standard_UMTS_encryption_algorithm_UEA1,
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RANAP_EncryptionAlgorithm_standard_UMTS_encryption_algorithm_UEA2,
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};
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int ranap_tx_sec_mod_cmd(void)
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{
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RANAP_SecurityModeCommandIEs_t ies;
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RANAP_SecurityModeCommand_t out;
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struct msgb *msg;
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int rc;
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memset(&ies, 0, sizeof(ies));
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ies.presenceMask = SECURITYMODECOMMANDIES_RANAP_ENCRYPTIONINFORMATION_PRESENT;
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ASN_SEQUENCE_ADD(&ies.integrityProtectionInformation.permittedAlgorithms, &ip_alg[0]);
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ASN_SEQUENCE_ADD(&ies.integrityProtectionInformation.permittedAlgorithms, &ip_alg[1]);
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ies.integrityProtectionInformation.key; /* FIXME */
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if (0) {
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ASN_SEQUENCE_ADD(&ies.encryptionInformation.permittedAlgorithms, &enc_alg[0]);
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ASN_SEQUENCE_ADD(&ies.encryptionInformation.permittedAlgorithms, &enc_alg[1]);
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ies.encryptionInformation.key; /* FIXME */
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}
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ies.keyStatus = RANAP_KeyStatus_new; /* FIXME */
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rc = ranap_encode_securitymodecommandies(&out, &ies);
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asn_sequence_empty(&ies.integrityProtectionInformation.permittedAlgorithms);
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asn_sequence_empty(&ies.encryptionInformation.permittedAlgorithms);
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msg = ranap_generate_initiating_message(RANAP_ProcedureCode_id_SecurityModeControl,
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RANAP_Criticality_reject,
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&asn_DEF_RANAP_SecurityModeCommand,
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&out);
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}
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int ranap_tx_common_id(const char *imsi)
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{
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RANAP_CommonID_IEs_t ies;
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RANAP_CommonID_t out;
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struct msgb *msg;
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int rc;
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memset(&ies, 0, sizeof(ies));
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if (imsi) {
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ies.permanentNAS_UE_ID.present = RANAP_PermanentNAS_UE_ID_PR_iMSI;
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ies.permanentNAS_UE_ID.choice.iMSI; /* FIXME */
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} else
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ies.permanentNAS_UE_ID.present = RANAP_PermanentNAS_UE_ID_PR_NOTHING;
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rc = ranap_encode_commonidies(&out, &ies);
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msg = ranap_generate_initiating_message(RANAP_ProcedureCode_id_CommonID,
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RANAP_Criticality_ignore,
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&asn_DEF_RANAP_CommonID,
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&out);
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}
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int ranap_tx_iu_rel_cmd(RANAP_Cause_t cause)
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{
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RANAP_Iu_ReleaseCommandIEs_t ies;
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RANAP_Iu_ReleaseCommand_t out;
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struct msgb *msg;
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int rc;
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memset(&ies, 0, sizeof(ies));
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ies.cause = cause;
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rc = ranap_encode_iu_releasecommandies(&out, &ies);
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msg = ranap_generate_initiating_message(RANAP_ProcedureCode_id_Iu_Release,
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RANAP_Criticality_reject,
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&asn_DEF_RANAP_ReleaseCommand,
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&out);
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}
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int ranap_tx_paging_cmd(const char *imsi, uint32_t *tmsi, uint32_t cause)
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{
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RANAP_PagingIEs_s ies;
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RANAP_Paging_t out;
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memset(&ies, 0, sizeof(ies));
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if (is_ps)
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ies.cN_DomainIndicator = RANAP_CN_DomainIndicator_ps_domain;
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else
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ies.cN_DomainIndicator = RANAP_CN_DomainIndicator_cs_domain;
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ies.permanentNAS_UE_ID; /* FIXME */
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if (tmsi) {
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ies.presenceMask |= PAGINGIES_RANAP_TEMPORARYUE_ID_PRESENT;
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if (is_ps) {
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ies.temporaryUE_ID.present = RANAP_TemporaryUE_ID_PR_p_TMSI;
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ies.temporaryUE_ID.choice.tMSI;
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} else {
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ies.temporaryUE_ID.present = RANAP_TemporaryUE_ID_PR_tMSI;
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ies.temporaryUE_ID.choice.p_TMSI;
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}
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}
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if (cause) {
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ies.presenceMask |= PAGINGIES_RANAP_PAGINGCAUSE_PRESENT;
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ies.pagingCause = cause;
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}
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rc = ranap_encode_iu_pagingies(&out, &ies);
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msg = ranap_generate_initiating_message(RANAP_ProcedureCode_id_Iu_Paging,
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RANAP_Criticality_reject,
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&asn_DEF_RANAP_Paging,
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&out);
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}
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static RANAP_RAB_Parameters_t rab_par_voice = {
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.trafficClass = RANAP_TrafficClass_conversational,
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.rAB_AsymmetryIndicator = ANAP_RAB_AsymmetryIndicator_symmetric_bidirectional
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.maxBitrate = ,
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.deliveryOrder = RANAP_DeliveryOrder_delivery_order_not_requested
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.maxSDU_Size = 1234,
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.sDU_Parameters = ,
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};
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static RANAP_UserPlaneInformation_t rab_upl_voice = {
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.userPlaneMode = RANAP_UserPlaneMode_transparent_mode,
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.uP_ModeVersions = FIXME,
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};
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int ranap_tx_rab_assign()
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{
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RANAP_ProtocolIE_FieldPair_t *pair;
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RANAP_RAB_AssignmentRequestIEs_t ies;
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RANAP_RAB_AssignmentRequest_t out;
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memset(&ies, 0, sizeof(ies));
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ies.presenceMask = RAB_ASSIGNMENTREQUESTIES_RANAP_RAB_SETUPORMODIFYLIST_PRESENT;
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/* RANAP_RAB_IE_ContainerPairList_t */
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RANAP_RAB_SetupOrModifyItemFirst_t first;
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first.rAB_ID = FIXME;
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first.nAS_SynchronisationIndicator = FIXME;
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first.rAB_Parameters = &rab_par_voice;
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first.userPlaneInformation = &rab_upl_voice;
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first.transportLayerInformation = NULL;
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RANAP_RAB_SetupOrModifyItemSecond_t second;
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pair = ranap_new_ie_pair(RANAP_ProtocolIE_ID_id_RAB_SetupOrModifyItem,
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RANAP_Criticality_reject,
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SetupOrModifyItemFirst, &first,
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RANAP_Criticality_ignore,
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SetupOrModifyItemSecond, &second);
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ASN_SEQUENCE_ADD(&ies.raB_SetupOrModifyList.list, pair);
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rc = ranap_encode_rab_assignmentrequesties(&out, &ies);
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}
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