| /* hnb-gw specific code for HNBAP */ |
| |
| /* (C) 2015 by Harald Welte <laforge@gnumonks.org> |
| * All Rights Reserved |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU Affero General Public License as published by |
| * the Free Software Foundation; either version 3 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU Affero General Public License for more details. |
| * |
| * You should have received a copy of the GNU Affero General Public License |
| * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| * |
| */ |
| |
| #include <osmocom/core/msgb.h> |
| #include <osmocom/core/utils.h> |
| #include <osmocom/core/socket.h> |
| #include <osmocom/gsm/gsm48.h> |
| #include <osmocom/netif/stream.h> |
| |
| #include <unistd.h> |
| #include <errno.h> |
| #include <string.h> |
| |
| #include "asn1helpers.h" |
| #include <osmocom/hnbap/hnbap_common.h> |
| #include <osmocom/ranap/iu_helpers.h> |
| |
| #include <osmocom/iuh/hnbgw.h> |
| #include <osmocom/hnbap/hnbap_ies_defs.h> |
| |
| #define IU_MSG_NUM_IES 32 |
| #define IU_MSG_NUM_EXT_IES 32 |
| |
| static int hnbgw_hnbap_tx(struct hnb_context *ctx, struct msgb *msg) |
| { |
| if (!msg) |
| return -EINVAL; |
| |
| msgb_sctp_ppid(msg) = IUH_PPI_HNBAP; |
| osmo_stream_srv_send(ctx->conn, msg); |
| |
| return 0; |
| } |
| |
| static int hnbgw_tx_hnb_register_rej(struct hnb_context *ctx) |
| { |
| HNBRegisterReject_t reject_out; |
| HNBRegisterRejectIEs_t reject; |
| struct msgb *msg; |
| int rc; |
| |
| reject.presenceMask = 0, |
| reject.cause.present = Cause_PR_radioNetwork; |
| reject.cause.choice.radioNetwork = CauseRadioNetwork_unspecified; |
| |
| /* encode the Information Elements */ |
| memset(&reject_out, 0, sizeof(reject_out)); |
| rc = hnbap_encode_hnbregisterrejecties(&reject_out, &reject); |
| if (rc < 0) { |
| LOGP(DHNBAP, LOGL_ERROR, "Failure to encode HNB-REGISTER-REJECT to %s: rc=%d\n", |
| ctx->identity_info, rc); |
| return rc; |
| } |
| |
| /* generate a successfull outcome PDU */ |
| msg = hnbap_generate_unsuccessful_outcome(ProcedureCode_id_HNBRegister, |
| Criticality_reject, |
| &asn_DEF_HNBRegisterReject, |
| &reject_out); |
| |
| ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_HNBRegisterReject, &reject_out); |
| |
| rc = hnbgw_hnbap_tx(ctx, msg); |
| if (rc == 0) { |
| /* Tell libosmo-netif to destroy this connection when it is done |
| * sending our HNB-REGISTER-REJECT response. */ |
| osmo_stream_srv_set_flush_and_destroy(ctx->conn); |
| } else { |
| /* The message was not queued. Destroy the connection right away. */ |
| hnb_context_release(ctx); |
| } |
| } |
| |
| static int hnbgw_tx_hnb_register_acc(struct hnb_context *ctx) |
| { |
| HNBRegisterAccept_t accept_out; |
| struct msgb *msg; |
| int rc; |
| |
| /* Single required response IE: RNC-ID */ |
| HNBRegisterAcceptIEs_t accept = { |
| .rnc_id = ctx->gw->config.rnc_id |
| }; |
| |
| /* encode the Information Elements */ |
| memset(&accept_out, 0, sizeof(accept_out)); |
| rc = hnbap_encode_hnbregisteraccepties(&accept_out, &accept); |
| if (rc < 0) { |
| LOGP(DHNBAP, LOGL_ERROR, "Failure to encode HNB-REGISTER-ACCEPT to %s: rc=%d\n", |
| ctx->identity_info, rc); |
| return rc; |
| } |
| |
| /* generate a successfull outcome PDU */ |
| msg = hnbap_generate_successful_outcome(ProcedureCode_id_HNBRegister, |
| Criticality_reject, |
| &asn_DEF_HNBRegisterAccept, |
| &accept_out); |
| |
| ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_HNBRegisterAccept, &accept_out); |
| |
| return hnbgw_hnbap_tx(ctx, msg); |
| } |
| |
| |
| static int hnbgw_tx_ue_register_acc(struct ue_context *ue) |
| { |
| UERegisterAccept_t accept_out; |
| UERegisterAcceptIEs_t accept; |
| struct msgb *msg; |
| uint8_t encoded_imsi[10]; |
| uint32_t ctx_id; |
| size_t encoded_imsi_len; |
| int rc; |
| |
| encoded_imsi_len = ranap_imsi_encode(encoded_imsi, |
| sizeof(encoded_imsi), ue->imsi); |
| |
| memset(&accept, 0, sizeof(accept)); |
| accept.uE_Identity.present = UE_Identity_PR_iMSI; |
| OCTET_STRING_fromBuf(&accept.uE_Identity.choice.iMSI, |
| (const char *)encoded_imsi, encoded_imsi_len); |
| asn1_u24_to_bitstring(&accept.context_ID, &ctx_id, ue->context_id); |
| |
| memset(&accept_out, 0, sizeof(accept_out)); |
| rc = hnbap_encode_ueregisteraccepties(&accept_out, &accept); |
| if (rc < 0) { |
| return rc; |
| } |
| |
| msg = hnbap_generate_successful_outcome(ProcedureCode_id_UERegister, |
| Criticality_reject, |
| &asn_DEF_UERegisterAccept, |
| &accept_out); |
| |
| ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_OCTET_STRING, &accept.uE_Identity.choice.iMSI); |
| ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_UERegisterAccept, &accept_out); |
| |
| return hnbgw_hnbap_tx(ue->hnb, msg); |
| } |
| |
| static int hnbgw_tx_ue_register_rej_tmsi(struct hnb_context *hnb, UE_Identity_t *ue_id) |
| { |
| UERegisterReject_t reject_out; |
| UERegisterRejectIEs_t reject; |
| struct msgb *msg; |
| int rc; |
| |
| memset(&reject, 0, sizeof(reject)); |
| reject.uE_Identity.present = ue_id->present; |
| |
| /* Copy the identity over to the reject message */ |
| switch (ue_id->present) { |
| case UE_Identity_PR_tMSILAI: |
| LOGP(DHNBAP, LOGL_DEBUG, "REJ UE_Id tMSI %d %s\n", |
| ue_id->choice.tMSILAI.tMSI.size, |
| osmo_hexdump(ue_id->choice.tMSILAI.tMSI.buf, |
| ue_id->choice.tMSILAI.tMSI.size)); |
| |
| LOGP(DHNBAP, LOGL_DEBUG, "REJ UE_Id pLMNID %d %s\n", |
| ue_id->choice.tMSILAI.lAI.pLMNID.size, |
| osmo_hexdump(ue_id->choice.tMSILAI.lAI.pLMNID.buf, |
| ue_id->choice.tMSILAI.lAI.pLMNID.size)); |
| |
| LOGP(DHNBAP, LOGL_DEBUG, "REJ UE_Id lAC %d %s\n", |
| ue_id->choice.tMSILAI.lAI.lAC.size, |
| osmo_hexdump(ue_id->choice.tMSILAI.lAI.lAC.buf, |
| ue_id->choice.tMSILAI.lAI.lAC.size)); |
| |
| BIT_STRING_fromBuf(&reject.uE_Identity.choice.tMSILAI.tMSI, |
| ue_id->choice.tMSILAI.tMSI.buf, |
| ue_id->choice.tMSILAI.tMSI.size * 8 |
| - ue_id->choice.tMSILAI.tMSI.bits_unused); |
| OCTET_STRING_fromBuf(&reject.uE_Identity.choice.tMSILAI.lAI.pLMNID, |
| ue_id->choice.tMSILAI.lAI.pLMNID.buf, |
| ue_id->choice.tMSILAI.lAI.pLMNID.size); |
| OCTET_STRING_fromBuf(&reject.uE_Identity.choice.tMSILAI.lAI.lAC, |
| ue_id->choice.tMSILAI.lAI.lAC.buf, |
| ue_id->choice.tMSILAI.lAI.lAC.size); |
| break; |
| |
| case UE_Identity_PR_pTMSIRAI: |
| LOGP(DHNBAP, LOGL_DEBUG, "REJ UE_Id pTMSI %d %s\n", |
| ue_id->choice.pTMSIRAI.pTMSI.size, |
| osmo_hexdump(ue_id->choice.pTMSIRAI.pTMSI.buf, |
| ue_id->choice.pTMSIRAI.pTMSI.size)); |
| |
| LOGP(DHNBAP, LOGL_DEBUG, "REJ UE_Id pLMNID %d %s\n", |
| ue_id->choice.pTMSIRAI.rAI.lAI.pLMNID.size, |
| osmo_hexdump(ue_id->choice.pTMSIRAI.rAI.lAI.pLMNID.buf, |
| ue_id->choice.pTMSIRAI.rAI.lAI.pLMNID.size)); |
| |
| LOGP(DHNBAP, LOGL_DEBUG, "REJ UE_Id lAC %d %s\n", |
| ue_id->choice.pTMSIRAI.rAI.lAI.lAC.size, |
| osmo_hexdump(ue_id->choice.pTMSIRAI.rAI.lAI.lAC.buf, |
| ue_id->choice.pTMSIRAI.rAI.lAI.lAC.size)); |
| |
| LOGP(DHNBAP, LOGL_DEBUG, "REJ UE_Id rAC %d %s\n", |
| ue_id->choice.pTMSIRAI.rAI.rAC.size, |
| osmo_hexdump(ue_id->choice.pTMSIRAI.rAI.rAC.buf, |
| ue_id->choice.pTMSIRAI.rAI.rAC.size)); |
| |
| BIT_STRING_fromBuf(&reject.uE_Identity.choice.pTMSIRAI.pTMSI, |
| ue_id->choice.pTMSIRAI.pTMSI.buf, |
| ue_id->choice.pTMSIRAI.pTMSI.size * 8 |
| - ue_id->choice.pTMSIRAI.pTMSI.bits_unused); |
| OCTET_STRING_fromBuf(&reject.uE_Identity.choice.pTMSIRAI.rAI.lAI.pLMNID, |
| ue_id->choice.pTMSIRAI.rAI.lAI.pLMNID.buf, |
| ue_id->choice.pTMSIRAI.rAI.lAI.pLMNID.size); |
| OCTET_STRING_fromBuf(&reject.uE_Identity.choice.pTMSIRAI.rAI.lAI.lAC, |
| ue_id->choice.pTMSIRAI.rAI.lAI.lAC.buf, |
| ue_id->choice.pTMSIRAI.rAI.lAI.lAC.size); |
| OCTET_STRING_fromBuf(&reject.uE_Identity.choice.pTMSIRAI.rAI.rAC, |
| ue_id->choice.pTMSIRAI.rAI.rAC.buf, |
| ue_id->choice.pTMSIRAI.rAI.rAC.size); |
| break; |
| |
| default: |
| LOGP(DHNBAP, LOGL_ERROR, "Cannot compose UE Register Reject:" |
| " unsupported UE ID (present=%d)\n", ue_id->present); |
| return -1; |
| } |
| |
| LOGP(DHNBAP, LOGL_ERROR, "Rejecting UE Register Request:" |
| " TMSI identity registration is switched off\n"); |
| |
| reject.cause.present = Cause_PR_radioNetwork; |
| reject.cause.choice.radioNetwork = CauseRadioNetwork_invalid_UE_identity; |
| |
| memset(&reject_out, 0, sizeof(reject_out)); |
| rc = hnbap_encode_ueregisterrejecties(&reject_out, &reject); |
| if (rc < 0) |
| return rc; |
| |
| msg = hnbap_generate_unsuccessful_outcome(ProcedureCode_id_UERegister, |
| Criticality_reject, |
| &asn_DEF_UERegisterReject, |
| &reject_out); |
| |
| /* Free copied identity IEs */ |
| switch (ue_id->present) { |
| case UE_Identity_PR_tMSILAI: |
| ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_BIT_STRING, |
| &reject.uE_Identity.choice.tMSILAI.tMSI); |
| ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_OCTET_STRING, |
| &reject.uE_Identity.choice.tMSILAI.lAI.pLMNID); |
| ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_OCTET_STRING, |
| &reject.uE_Identity.choice.tMSILAI.lAI.lAC); |
| break; |
| |
| case UE_Identity_PR_pTMSIRAI: |
| ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_BIT_STRING, |
| &reject.uE_Identity.choice.pTMSIRAI.pTMSI); |
| ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_OCTET_STRING, |
| &reject.uE_Identity.choice.pTMSIRAI.rAI.lAI.pLMNID); |
| ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_OCTET_STRING, |
| &reject.uE_Identity.choice.pTMSIRAI.rAI.lAI.lAC); |
| ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_OCTET_STRING, |
| &reject.uE_Identity.choice.pTMSIRAI.rAI.rAC); |
| break; |
| |
| default: |
| /* should never happen after above switch() */ |
| break; |
| } |
| |
| ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_UERegisterReject, &reject_out); |
| |
| return hnbgw_hnbap_tx(hnb, msg); |
| } |
| |
| static int hnbgw_tx_ue_register_acc_tmsi(struct hnb_context *hnb, UE_Identity_t *ue_id) |
| { |
| UERegisterAccept_t accept_out; |
| UERegisterAcceptIEs_t accept; |
| struct msgb *msg; |
| uint32_t ctx_id; |
| uint32_t tmsi = 0; |
| struct ue_context *ue; |
| int rc; |
| |
| memset(&accept, 0, sizeof(accept)); |
| accept.uE_Identity.present = ue_id->present; |
| |
| switch (ue_id->present) { |
| case UE_Identity_PR_tMSILAI: |
| BIT_STRING_fromBuf(&accept.uE_Identity.choice.tMSILAI.tMSI, |
| ue_id->choice.tMSILAI.tMSI.buf, |
| ue_id->choice.tMSILAI.tMSI.size * 8 |
| - ue_id->choice.tMSILAI.tMSI.bits_unused); |
| tmsi = *(uint32_t*)accept.uE_Identity.choice.tMSILAI.tMSI.buf; |
| OCTET_STRING_fromBuf(&accept.uE_Identity.choice.tMSILAI.lAI.pLMNID, |
| ue_id->choice.tMSILAI.lAI.pLMNID.buf, |
| ue_id->choice.tMSILAI.lAI.pLMNID.size); |
| OCTET_STRING_fromBuf(&accept.uE_Identity.choice.tMSILAI.lAI.lAC, |
| ue_id->choice.tMSILAI.lAI.lAC.buf, |
| ue_id->choice.tMSILAI.lAI.lAC.size); |
| break; |
| |
| case UE_Identity_PR_pTMSIRAI: |
| BIT_STRING_fromBuf(&accept.uE_Identity.choice.pTMSIRAI.pTMSI, |
| ue_id->choice.pTMSIRAI.pTMSI.buf, |
| ue_id->choice.pTMSIRAI.pTMSI.size * 8 |
| - ue_id->choice.pTMSIRAI.pTMSI.bits_unused); |
| tmsi = *(uint32_t*)accept.uE_Identity.choice.pTMSIRAI.pTMSI.buf; |
| OCTET_STRING_fromBuf(&accept.uE_Identity.choice.pTMSIRAI.rAI.lAI.pLMNID, |
| ue_id->choice.pTMSIRAI.rAI.lAI.pLMNID.buf, |
| ue_id->choice.pTMSIRAI.rAI.lAI.pLMNID.size); |
| OCTET_STRING_fromBuf(&accept.uE_Identity.choice.pTMSIRAI.rAI.lAI.lAC, |
| ue_id->choice.pTMSIRAI.rAI.lAI.lAC.buf, |
| ue_id->choice.pTMSIRAI.rAI.lAI.lAC.size); |
| OCTET_STRING_fromBuf(&accept.uE_Identity.choice.pTMSIRAI.rAI.rAC, |
| ue_id->choice.pTMSIRAI.rAI.rAC.buf, |
| ue_id->choice.pTMSIRAI.rAI.rAC.size); |
| break; |
| |
| default: |
| LOGP(DHNBAP, LOGL_ERROR, "Unsupportedccept UE ID (present=%d)\n", |
| ue_id->present); |
| return -1; |
| } |
| |
| tmsi = ntohl(tmsi); |
| LOGP(DHNBAP, LOGL_DEBUG, "HNBAP register with TMSI %x\n", |
| tmsi); |
| |
| ue = ue_context_by_tmsi(hnb->gw, tmsi); |
| if (!ue) |
| ue = ue_context_alloc(hnb, NULL, tmsi); |
| |
| asn1_u24_to_bitstring(&accept.context_ID, &ctx_id, ue->context_id); |
| |
| memset(&accept_out, 0, sizeof(accept_out)); |
| rc = hnbap_encode_ueregisteraccepties(&accept_out, &accept); |
| if (rc < 0) |
| return rc; |
| |
| msg = hnbap_generate_successful_outcome(ProcedureCode_id_UERegister, |
| Criticality_reject, |
| &asn_DEF_UERegisterAccept, |
| &accept_out); |
| |
| switch (ue_id->present) { |
| case UE_Identity_PR_tMSILAI: |
| ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_BIT_STRING, |
| &accept.uE_Identity.choice.tMSILAI.tMSI); |
| ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_OCTET_STRING, |
| &accept.uE_Identity.choice.tMSILAI.lAI.pLMNID); |
| ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_OCTET_STRING, |
| &accept.uE_Identity.choice.tMSILAI.lAI.lAC); |
| break; |
| |
| case UE_Identity_PR_pTMSIRAI: |
| ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_BIT_STRING, |
| &accept.uE_Identity.choice.pTMSIRAI.pTMSI); |
| ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_OCTET_STRING, |
| &accept.uE_Identity.choice.pTMSIRAI.rAI.lAI.pLMNID); |
| ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_OCTET_STRING, |
| &accept.uE_Identity.choice.pTMSIRAI.rAI.lAI.lAC); |
| ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_OCTET_STRING, |
| &accept.uE_Identity.choice.pTMSIRAI.rAI.rAC); |
| break; |
| |
| default: |
| /* should never happen after above switch() */ |
| break; |
| } |
| |
| ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_UERegisterAccept, &accept_out); |
| |
| return hnbgw_hnbap_tx(hnb, msg); |
| } |
| |
| static int hnbgw_rx_hnb_deregister(struct hnb_context *ctx, ANY_t *in) |
| { |
| HNBDe_RegisterIEs_t ies; |
| int rc; |
| |
| rc = hnbap_decode_hnbde_registeries(&ies, in); |
| if (rc < 0) |
| return rc; |
| |
| DEBUGP(DHNBAP, "HNB-DE-REGISTER cause=%s\n", |
| hnbap_cause_str(&ies.cause)); |
| |
| hnbap_free_hnbde_registeries(&ies); |
| hnb_context_release(ctx); |
| |
| return 0; |
| } |
| |
| static int hnbgw_rx_hnb_register_req(struct hnb_context *ctx, ANY_t *in) |
| { |
| struct hnb_context *hnb; |
| HNBRegisterRequestIEs_t ies; |
| int rc; |
| |
| rc = hnbap_decode_hnbregisterrequesties(&ies, in); |
| if (rc < 0) { |
| LOGP(DHNBAP, LOGL_ERROR, "Failure to decode HNB-REGISTER-REQ from %s: rc=%d\n", |
| ctx->identity_info, rc); |
| return rc; |
| } |
| |
| /* copy all identity parameters from the message to ctx */ |
| asn1_strncpy(ctx->identity_info, &ies.hnB_Identity.hNB_Identity_Info, |
| sizeof(ctx->identity_info)); |
| ctx->id.lac = asn1str_to_u16(&ies.lac); |
| ctx->id.sac = asn1str_to_u16(&ies.sac); |
| ctx->id.rac = asn1str_to_u8(&ies.rac); |
| ctx->id.cid = asn1bitstr_to_u28(&ies.cellIdentity); |
| gsm48_mcc_mnc_from_bcd(ies.plmNidentity.buf, &ctx->id.mcc, &ctx->id.mnc); |
| |
| llist_for_each_entry(hnb, &ctx->gw->hnb_list, list) { |
| if (hnb->hnb_registered && ctx != hnb && memcmp(&ctx->id, &hnb->id, sizeof(ctx->id)) == 0) { |
| struct osmo_fd *ofd = osmo_stream_srv_get_ofd(ctx->conn); |
| char *name = osmo_sock_get_name(ctx, ofd->fd); |
| LOGP(DHNBAP, LOGL_ERROR, "rejecting HNB-REGISTER-REQ with duplicate cell identity " |
| "MCC=%u,MNC=%u,LAC=%u,RAC=%u,SAC=%u,CID=%u from %s\n", |
| ctx->id.mcc, ctx->id.mnc, ctx->id.lac, ctx->id.rac, ctx->id.sac, ctx->id.cid, name); |
| talloc_free(name); |
| return hnbgw_tx_hnb_register_rej(ctx); |
| } |
| } |
| |
| ctx->hnb_registered = true; |
| |
| DEBUGP(DHNBAP, "HNB-REGISTER-REQ from %s\n", ctx->identity_info); |
| |
| /* Send HNBRegisterAccept */ |
| rc = hnbgw_tx_hnb_register_acc(ctx); |
| hnbap_free_hnbregisterrequesties(&ies); |
| return rc; |
| } |
| |
| static int hnbgw_rx_ue_register_req(struct hnb_context *ctx, ANY_t *in) |
| { |
| UERegisterRequestIEs_t ies; |
| struct ue_context *ue; |
| char imsi[16]; |
| int rc; |
| |
| rc = hnbap_decode_ueregisterrequesties(&ies, in); |
| if (rc < 0) |
| return rc; |
| |
| switch (ies.uE_Identity.present) { |
| case UE_Identity_PR_iMSI: |
| ranap_bcd_decode(imsi, sizeof(imsi), ies.uE_Identity.choice.iMSI.buf, |
| ies.uE_Identity.choice.iMSI.size); |
| break; |
| case UE_Identity_PR_iMSIDS41: |
| ranap_bcd_decode(imsi, sizeof(imsi), ies.uE_Identity.choice.iMSIDS41.buf, |
| ies.uE_Identity.choice.iMSIDS41.size); |
| break; |
| case UE_Identity_PR_iMSIESN: |
| ranap_bcd_decode(imsi, sizeof(imsi), ies.uE_Identity.choice.iMSIESN.iMSIDS41.buf, |
| ies.uE_Identity.choice.iMSIESN.iMSIDS41.size); |
| break; |
| case UE_Identity_PR_tMSILAI: |
| case UE_Identity_PR_pTMSIRAI: |
| if (ctx->gw->config.hnbap_allow_tmsi) |
| rc = hnbgw_tx_ue_register_acc_tmsi(ctx, &ies.uE_Identity); |
| else |
| rc = hnbgw_tx_ue_register_rej_tmsi(ctx, &ies.uE_Identity); |
| /* all has been handled by TMSI, skip the IMSI code below */ |
| hnbap_free_ueregisterrequesties(&ies); |
| return rc; |
| default: |
| LOGP(DHNBAP, LOGL_NOTICE, |
| "UE-REGISTER-REQ with unsupported UE Id type %d\n", |
| ies.uE_Identity.present); |
| hnbap_free_ueregisterrequesties(&ies); |
| return rc; |
| } |
| |
| DEBUGP(DHNBAP, "UE-REGISTER-REQ ID_type=%d imsi=%s cause=%ld\n", |
| ies.uE_Identity.present, imsi, ies.registration_Cause); |
| |
| ue = ue_context_by_imsi(ctx->gw, imsi); |
| if (!ue) |
| ue = ue_context_alloc(ctx, imsi, 0); |
| |
| hnbap_free_ueregisterrequesties(&ies); |
| /* Send UERegisterAccept */ |
| return hnbgw_tx_ue_register_acc(ue); |
| } |
| |
| static int hnbgw_rx_ue_deregister(struct hnb_context *ctx, ANY_t *in) |
| { |
| UEDe_RegisterIEs_t ies; |
| struct ue_context *ue; |
| int rc; |
| uint32_t ctxid; |
| |
| rc = hnbap_decode_uede_registeries(&ies, in); |
| if (rc < 0) |
| return rc; |
| |
| ctxid = asn1bitstr_to_u24(&ies.context_ID); |
| |
| DEBUGP(DHNBAP, "UE-DE-REGISTER context=%u cause=%s\n", |
| ctxid, hnbap_cause_str(&ies.cause)); |
| |
| ue = ue_context_by_id(ctx->gw, ctxid); |
| if (ue) |
| ue_context_free(ue); |
| |
| hnbap_free_uede_registeries(&ies); |
| return 0; |
| } |
| |
| static int hnbgw_rx_err_ind(struct hnb_context *hnb, ANY_t *in) |
| { |
| ErrorIndicationIEs_t ies; |
| int rc; |
| |
| rc = hnbap_decode_errorindicationies(&ies, in); |
| if (rc < 0) |
| return rc; |
| |
| LOGP(DHNBAP, LOGL_NOTICE, "HNBAP ERROR.ind, cause: %s\n", |
| hnbap_cause_str(&ies.cause)); |
| |
| hnbap_free_errorindicationies(&ies); |
| return 0; |
| } |
| |
| static int hnbgw_rx_initiating_msg(struct hnb_context *hnb, InitiatingMessage_t *imsg) |
| { |
| int rc = 0; |
| |
| switch (imsg->procedureCode) { |
| case ProcedureCode_id_HNBRegister: /* 8.2 */ |
| rc = hnbgw_rx_hnb_register_req(hnb, &imsg->value); |
| break; |
| case ProcedureCode_id_HNBDe_Register: /* 8.3 */ |
| rc = hnbgw_rx_hnb_deregister(hnb, &imsg->value); |
| break; |
| case ProcedureCode_id_UERegister: /* 8.4 */ |
| rc = hnbgw_rx_ue_register_req(hnb, &imsg->value); |
| break; |
| case ProcedureCode_id_UEDe_Register: /* 8.5 */ |
| rc = hnbgw_rx_ue_deregister(hnb, &imsg->value); |
| break; |
| case ProcedureCode_id_ErrorIndication: /* 8.6 */ |
| rc = hnbgw_rx_err_ind(hnb, &imsg->value); |
| break; |
| case ProcedureCode_id_TNLUpdate: /* 8.9 */ |
| case ProcedureCode_id_HNBConfigTransfer: /* 8.10 */ |
| case ProcedureCode_id_RelocationComplete: /* 8.11 */ |
| case ProcedureCode_id_U_RNTIQuery: /* 8.12 */ |
| case ProcedureCode_id_privateMessage: |
| LOGP(DHNBAP, LOGL_NOTICE, "Unimplemented HNBAP Procedure %ld\n", |
| imsg->procedureCode); |
| break; |
| default: |
| LOGP(DHNBAP, LOGL_NOTICE, "Unknown HNBAP Procedure %ld\n", |
| imsg->procedureCode); |
| break; |
| } |
| |
| return rc; |
| } |
| |
| static int hnbgw_rx_successful_outcome_msg(struct hnb_context *hnb, SuccessfulOutcome_t *msg) |
| { |
| /* We don't care much about HNBAP */ |
| return 0; |
| } |
| |
| static int hnbgw_rx_unsuccessful_outcome_msg(struct hnb_context *hnb, UnsuccessfulOutcome_t *msg) |
| { |
| /* We don't care much about HNBAP */ |
| LOGP(DHNBAP, LOGL_ERROR, "Received Unsuccessful Outcome, procedureCode %ld, criticality %ld," |
| " from '%s', cell mcc %u mnc %u lac %u rac %u sac %u cid %u\n", |
| msg->procedureCode, msg->criticality, hnb->identity_info, |
| hnb->id.mcc, hnb->id.mnc, hnb->id.lac, hnb->id.rac, hnb->id.sac, hnb->id.cid); |
| return 0; |
| } |
| |
| |
| static int _hnbgw_hnbap_rx(struct hnb_context *hnb, HNBAP_PDU_t *pdu) |
| { |
| int rc = 0; |
| |
| /* it's a bit odd that we can't dispatch on procedure code, but |
| * that's not possible */ |
| switch (pdu->present) { |
| case HNBAP_PDU_PR_initiatingMessage: |
| rc = hnbgw_rx_initiating_msg(hnb, &pdu->choice.initiatingMessage); |
| break; |
| case HNBAP_PDU_PR_successfulOutcome: |
| rc = hnbgw_rx_successful_outcome_msg(hnb, &pdu->choice.successfulOutcome); |
| break; |
| case HNBAP_PDU_PR_unsuccessfulOutcome: |
| rc = hnbgw_rx_unsuccessful_outcome_msg(hnb, &pdu->choice.unsuccessfulOutcome); |
| break; |
| default: |
| LOGP(DHNBAP, LOGL_NOTICE, "Unknown HNBAP Presence %u\n", |
| pdu->present); |
| rc = -1; |
| } |
| |
| return rc; |
| } |
| |
| int hnbgw_hnbap_rx(struct hnb_context *hnb, struct msgb *msg) |
| { |
| HNBAP_PDU_t _pdu, *pdu = &_pdu; |
| asn_dec_rval_t dec_ret; |
| int rc; |
| |
| /* decode and handle to _hnbgw_hnbap_rx() */ |
| |
| memset(pdu, 0, sizeof(*pdu)); |
| dec_ret = aper_decode(NULL, &asn_DEF_HNBAP_PDU, (void **) &pdu, |
| msg->data, msgb_length(msg), 0, 0); |
| if (dec_ret.code != RC_OK) { |
| LOGP(DHNBAP, LOGL_ERROR, "Error in ASN.1 decode\n"); |
| return -1; |
| } |
| |
| rc = _hnbgw_hnbap_rx(hnb, pdu); |
| |
| ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_HNBAP_PDU, pdu); |
| |
| return rc; |
| } |
| |
| |
| int hnbgw_hnbap_init(void) |
| { |
| return 0; |
| } |