479 lines
14 KiB
C
479 lines
14 KiB
C
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#include "asn1helpers.h"
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#include "iu_helpers.h"
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#include "ranap_common.h"
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#include "ranap_ies_defs.h"
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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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static long *new_long(long in)
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{
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long *out = CALLOC(1, sizeof(long));
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*out = in;
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return out;
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}
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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 = (uint8_t *) 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 RANAP_EncryptionAlgorithm_t enc_alg[2] = {
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RANAP_EncryptionAlgorithm_standard_UMTS_encryption_algorith_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 i, rc;
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memset(&ies, 0, sizeof(ies));
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ies.presenceMask = SECURITYMODECOMMANDIES_RANAP_ENCRYPTIONINFORMATION_PRESENT;
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for (i = 0; i < ARRAY_SIZE(ip_alg); i++) {
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/* needs to be dynamically allocated, as
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* SET_OF_free() will call FREEMEM() on it */
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RANAP_IntegrityProtectionAlgorithm_t *alg = CALLOC(1, sizeof(*alg));
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*alg = ip_alg[i];
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ASN_SEQUENCE_ADD(&ies.integrityProtectionInformation.permittedAlgorithms, alg);
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}
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ies.integrityProtectionInformation.key; /* FIXME */
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if (0) {
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for (i = 0; i < ARRAY_SIZE(ip_alg); i++) {
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/* needs to be dynamically allocated, as
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* SET_OF_free() will call FREEMEM() on it */
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RANAP_EncryptionAlgorithm_t *alg = CALLOC(1, sizeof(*alg));
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*alg = enc_alg[i];
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ASN_SEQUENCE_ADD(&ies.encryptionInformation.permittedAlgorithms, alg);
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}
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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_commonid_ies(&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_Iu_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, int is_ps, uint32_t cause)
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{
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RANAP_PagingIEs_t ies;
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RANAP_Paging_t out;
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struct msgb *msg;
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uint8_t *imsi_buf = CALLOC(1, 16);
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int rc;
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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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rc = encode_iu_imsi(imsi_buf, 16, 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.buf = imsi_buf;
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ies.permanentNAS_UE_ID.choice.iMSI.size = rc;
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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_pagingies(&out, &ies);
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msg = ranap_generate_initiating_message(RANAP_ProcedureCode_id_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_SDU_ErrorRatio_t *new_sdu_error_ratio(long mantissa, long exponent)
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{
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RANAP_SDU_ErrorRatio_t *err = CALLOC(1, sizeof(*err));
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err->mantissa = mantissa;
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err->exponent = exponent;
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return err;
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}
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static RANAP_SDU_FormatInformationParameterItem_t *
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new_format_info_pars(long sdu_size)
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{
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RANAP_SDU_FormatInformationParameterItem_t *fmti = CALLOC(1, sizeof(*fmti));
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fmti->subflowSDU_Size = new_long(sdu_size);
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return fmti;
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}
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enum sdu_par_profile {
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SDUPAR_P_VOICE0,
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SDUPAR_P_VOICE1,
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SDUPAR_P_VOICE2,
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SDUPAR_P_DATA,
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};
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/* See Chapter 5 of TS 26.102 */
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static RANAP_SDU_ParameterItem_t *new_sdu_par_item(enum sdu_par_profile profile)
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{
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RANAP_SDU_ParameterItem_t *sdui = CALLOC(1, sizeof(*sdui));
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RANAP_SDU_FormatInformationParameters_t *fmtip = CALLOC(1, sizeof(*fmtip));
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RANAP_SDU_FormatInformationParameterItem_t *fmti;
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switch (profile) {
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case SDUPAR_P_VOICE0:
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sdui->sDU_ErrorRatio = new_sdu_error_ratio(1, 5);
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sdui->residualBitErrorRatio.mantissa = 1;
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sdui->residualBitErrorRatio.exponent = 6;
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sdui->deliveryOfErroneousSDU = RANAP_DeliveryOfErroneousSDU_yes;
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sdui->sDU_FormatInformationParameters = fmtip;
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fmti = new_format_info_pars(81);
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ASN_SEQUENCE_ADD(fmtip, fmti);
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fmti = new_format_info_pars(39);
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ASN_SEQUENCE_ADD(fmtip, fmti);
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/* FIXME: could be 10 SDU descriptors for AMR! */
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break;
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case SDUPAR_P_VOICE1:
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sdui->residualBitErrorRatio.mantissa = 1;
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sdui->residualBitErrorRatio.exponent = 3;
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sdui->deliveryOfErroneousSDU = RANAP_DeliveryOfErroneousSDU_no_error_detection_consideration;
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fmti = new_format_info_pars(103);
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ASN_SEQUENCE_ADD(fmtip, fmti);
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fmti = new_format_info_pars(0);
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ASN_SEQUENCE_ADD(fmtip, fmti);
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/* FIXME: could be 10 SDU descriptors for AMR! */
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break;
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case SDUPAR_P_VOICE2:
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sdui->residualBitErrorRatio.mantissa = 5;
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sdui->residualBitErrorRatio.exponent = 3;
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sdui->deliveryOfErroneousSDU = RANAP_DeliveryOfErroneousSDU_no_error_detection_consideration;
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fmti = new_format_info_pars(60);
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ASN_SEQUENCE_ADD(fmtip, fmti);
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fmti = new_format_info_pars(0);
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ASN_SEQUENCE_ADD(fmtip, fmti);
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/* FIXME: could be 10 SDU descriptors for AMR! */
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break;
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case SDUPAR_P_DATA:
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sdui->sDU_ErrorRatio = new_sdu_error_ratio(1, 4);
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sdui->residualBitErrorRatio.mantissa = 1;
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sdui->residualBitErrorRatio.exponent = 5;
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sdui->deliveryOfErroneousSDU = RANAP_DeliveryOfErroneousSDU_no;
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break;
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}
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return sdui;
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}
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static RANAP_AllocationOrRetentionPriority_t *
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new_alloc_ret_prio(RANAP_PriorityLevel_t level, int capability, int vulnerability,
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int queueing_allowed)
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{
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RANAP_AllocationOrRetentionPriority_t *arp = CALLOC(1, sizeof(*arp));
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arp->priorityLevel = level;
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if (capability)
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arp->pre_emptionCapability = RANAP_Pre_emptionCapability_may_trigger_pre_emption;
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else
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arp->pre_emptionCapability = RANAP_Pre_emptionCapability_shall_not_trigger_pre_emption;
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if (vulnerability)
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arp->pre_emptionVulnerability = RANAP_Pre_emptionVulnerability_pre_emptable;
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else
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arp->pre_emptionVulnerability = RANAP_Pre_emptionVulnerability_not_pre_emptable;
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if (queueing_allowed)
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arp->queuingAllowed = RANAP_QueuingAllowed_queueing_allowed;
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else
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arp->queuingAllowed = RANAP_QueuingAllowed_queueing_not_allowed;
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return arp;
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}
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/* See Chapter 5 of TS 26.102 */
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static RANAP_RAB_Parameters_t *new_rab_par_voice(void)
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{
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RANAP_RAB_Parameters_t *rab = CALLOC(1, sizeof(*rab));
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RANAP_SDU_ParameterItem_t *sdui;
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rab->trafficClass = RANAP_TrafficClass_conversational;
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rab->rAB_AsymmetryIndicator = RANAP_RAB_AsymmetryIndicator_symmetric_bidirectional;
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ASN_SEQUENCE_ADD(&rab->maxBitrate, new_long(12200));
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rab->guaranteedBitRate = CALLOC(1, sizeof(*rab->guaranteedBitRate));
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ASN_SEQUENCE_ADD(&rab->guaranteedBitRate, new_long(12200));
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rab->deliveryOrder = RANAP_DeliveryOrder_delivery_order_requested;
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rab->maxSDU_Size = 244;
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RANAP_SDU_Parameters_t *sdup = CALLOC(1, sizeof(*sdup));
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ASN_SEQUENCE_ADD(&sdup->list, sdui);
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sdui = new_sdu_par_item(SDUPAR_P_VOICE0);
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ASN_SEQUENCE_ADD(&rab->sDU_Parameters, sdui);
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sdui = new_sdu_par_item(SDUPAR_P_VOICE1);
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ASN_SEQUENCE_ADD(&rab->sDU_Parameters, sdui);
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sdui = new_sdu_par_item(SDUPAR_P_VOICE2);
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ASN_SEQUENCE_ADD(&rab->sDU_Parameters, sdui);
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rab->transferDelay = new_long(80);
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rab->allocationOrRetentionPriority = new_alloc_ret_prio(RANAP_PriorityLevel_no_priority, 0, 1, 0);
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rab->sourceStatisticsDescriptor = new_long(RANAP_SourceStatisticsDescriptor_speech);
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return rab;
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}
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static RANAP_RAB_Parameters_t *new_rab_par_data(void)
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{
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RANAP_RAB_Parameters_t *rab = CALLOC(1, sizeof(*rab));
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RANAP_SDU_ParameterItem_t *sdui;
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rab->trafficClass = RANAP_TrafficClass_background;
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rab->rAB_AsymmetryIndicator = RANAP_RAB_AsymmetryIndicator_asymmetric_bidirectional;
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ASN_SEQUENCE_ADD(&rab->maxBitrate, new_long(16000000));
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ASN_SEQUENCE_ADD(&rab->maxBitrate, new_long(8000000));
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rab->deliveryOrder = RANAP_DeliveryOrder_delivery_order_requested;
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rab->maxSDU_Size = 8000;
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sdui = new_sdu_par_item(SDUPAR_P_DATA);
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ASN_SEQUENCE_ADD(&rab->sDU_Parameters, sdui);
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rab->allocationOrRetentionPriority = new_alloc_ret_prio(RANAP_PriorityLevel_no_priority, 0, 0, 0);
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/* FIXME: RAB-Parameter-ExtendedMaxBitrateList for 42Mbps? */
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return rab;
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}
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static RANAP_TransportLayerInformation_t *new_transp_info_rtp(uint32_t ip, uint16_t port)
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{
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RANAP_TransportLayerInformation_t *tli = CALLOC(1, sizeof(*tli));
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uint32_t *ipbuf = CALLOC(1, sizeof(*ipbuf));
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uint8_t binding_id[4];
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binding_id[0] = port >> 8;
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binding_id[1] = port & 0xff;
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binding_id[2] = binding_id[3] = 0;
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asn1_u32_to_bitstring(&tli->transportLayerAddress, ipbuf, htonl(ip));
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tli->iuTransportAssociation.present = RANAP_IuTransportAssociation_PR_bindingID;
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OCTET_STRING_fromBuf(&tli->iuTransportAssociation.choice.bindingID,
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(const char *) binding_id, sizeof(binding_id));
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return tli;
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}
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static RANAP_TransportLayerInformation_t *new_transp_info_gtp(uint32_t ip, uint32_t tei)
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{
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RANAP_TransportLayerInformation_t *tli = CALLOC(1, sizeof(*tli));
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uint32_t *ipbuf = CALLOC(1, sizeof(*ipbuf));
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uint32_t binding_buf = htonl(tei);
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asn1_u32_to_bitstring(&tli->transportLayerAddress, ipbuf, htonl(ip));
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tli->iuTransportAssociation.present = RANAP_IuTransportAssociation_PR_gTP_TEI;
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OCTET_STRING_fromBuf(&tli->iuTransportAssociation.choice.bindingID,
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(const char *) &binding_buf, sizeof(binding_buf));
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return tli;
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}
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static RANAP_UserPlaneInformation_t *new_upi(long mode, uint8_t mode_versions)
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{
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RANAP_UserPlaneInformation_t *upi = CALLOC(1, sizeof(*upi));
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uint8_t *buf = CALLOC(1, sizeof(*buf));
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*buf = mode_versions;
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upi->userPlaneMode = mode;
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upi->uP_ModeVersions.buf = buf;
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upi->uP_ModeVersions.size = 1;
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upi->uP_ModeVersions.bits_unused = 0;
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return upi;
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}
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static void assign_new_ra_id(RANAP_RAB_ID_t *id, uint8_t rab_id)
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{
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uint8_t *buf = CALLOC(1, sizeof(*buf));
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*buf = rab_id << 3;
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id->buf = buf;
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id->size = 1;
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id->bits_unused = 0;
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}
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int ranap_tx_rab_assign_voice(uint8_t rab_id, uint32_t rtp_ip, uint16_t rtp_port)
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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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int rc;
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memset(&ies, 0, sizeof(ies));
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/* only assingnment is present, no release */
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ies.presenceMask = RAB_ASSIGNMENTREQUESTIES_RANAP_RAB_SETUPORMODIFYLIST_PRESENT;
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RANAP_RAB_SetupOrModifyItemFirst_t first;
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assign_new_ra_id(&first.rAB_ID, rab_id);
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//first.nAS_SynchronisationIndicator = FIXME;
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first.rAB_Parameters = new_rab_par_voice();
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first.userPlaneInformation = new_upi(RANAP_UserPlaneMode_support_mode_for_predefined_SDU_sizes, 1); /* 2? */
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first.transportLayerInformation = new_transp_info_rtp(rtp_ip, rtp_port);
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RANAP_RAB_SetupOrModifyItemSecond_t second;
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memset(&second, 0, sizeof(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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&asn_DEF_RANAP_RAB_SetupOrModifyItemFirst, &first,
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RANAP_Criticality_ignore,
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&asn_DEF_RANAP_RAB_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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int ranap_tx_rab_assign_data(uint8_t rab_id, uint32_t gtp_ip, uint16_t gtp_port)
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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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RANAP_DataVolumeReportingIndication_t *dat_vol_ind = CALLOC(1, sizeof(*dat_vol_ind));
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int rc;
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memset(&ies, 0, sizeof(ies));
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/* only assingnment is present, no release */
|
|
ies.presenceMask = RAB_ASSIGNMENTREQUESTIES_RANAP_RAB_SETUPORMODIFYLIST_PRESENT;
|
|
|
|
RANAP_RAB_SetupOrModifyItemFirst_t first;
|
|
|
|
assign_new_ra_id(&first.rAB_ID, rab_id);
|
|
//first.nAS_SynchronisationIndicator = FIXME;
|
|
first.rAB_Parameters = new_rab_par_data();
|
|
first.userPlaneInformation = new_upi(RANAP_UserPlaneMode_transparent_mode, 1);
|
|
first.transportLayerInformation = new_transp_info_rtp(gtp_ip, gtp_port);
|
|
|
|
RANAP_RAB_SetupOrModifyItemSecond_t second;
|
|
memset(&second, 0, sizeof(second));
|
|
second.pDP_TypeInformation = CALLOC(1, sizeof(*second.pDP_TypeInformation));
|
|
ASN_SEQUENCE_ADD(&second.pDP_TypeInformation, new_long(RANAP_PDP_Type_ipv4));
|
|
*dat_vol_ind = RANAP_DataVolumeReportingIndication_do_not_report;
|
|
second.dataVolumeReportingIndication = dat_vol_ind;
|
|
second.dl_GTP_PDU_SequenceNumber = new_long(0);
|
|
second.ul_GTP_PDU_SequenceNumber = new_long(0);
|
|
|
|
pair = ranap_new_ie_pair(RANAP_ProtocolIE_ID_id_RAB_SetupOrModifyItem,
|
|
RANAP_Criticality_reject,
|
|
&asn_DEF_RANAP_RAB_SetupOrModifyItemFirst, &first,
|
|
RANAP_Criticality_ignore,
|
|
&asn_DEF_RANAP_RAB_SetupOrModifyItemSecond, &second);
|
|
|
|
ASN_SEQUENCE_ADD(&ies.raB_SetupOrModifyList.list, pair);
|
|
|
|
rc = ranap_encode_rab_assignmentrequesties(&out, &ies);
|
|
}
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