Harald Welte | ba43de4 | 2015-08-29 20:33:16 +0200 | [diff] [blame] | 1 | #include <osmocom/core/msgb.h> |
Harald Welte | b3dae30 | 2015-08-30 12:20:09 +0200 | [diff] [blame] | 2 | #include <osmocom/core/utils.h> |
Harald Welte | 10dfc5a | 2015-09-11 01:34:45 +0200 | [diff] [blame] | 3 | #include <osmocom/gsm/gsm48.h> |
Harald Welte | ba43de4 | 2015-08-29 20:33:16 +0200 | [diff] [blame] | 4 | |
Harald Welte | b3dae30 | 2015-08-30 12:20:09 +0200 | [diff] [blame] | 5 | #include <unistd.h> |
Harald Welte | ee77cff | 2015-08-30 16:57:53 +0200 | [diff] [blame] | 6 | #include <errno.h> |
Harald Welte | b3dae30 | 2015-08-30 12:20:09 +0200 | [diff] [blame] | 7 | #include <string.h> |
| 8 | |
Harald Welte | 30afef3 | 2015-08-30 12:28:29 +0200 | [diff] [blame] | 9 | #include "asn1helpers.h" |
| 10 | |
Harald Welte | ba43de4 | 2015-08-29 20:33:16 +0200 | [diff] [blame] | 11 | #include "hnbgw.h" |
Harald Welte | 27f9c4a | 2015-08-30 22:47:18 +0200 | [diff] [blame] | 12 | #include "hnbap_common.h" |
| 13 | #include "hnbap_ies_defs.h" |
Harald Welte | ba43de4 | 2015-08-29 20:33:16 +0200 | [diff] [blame] | 14 | |
Harald Welte | ee77cff | 2015-08-30 16:57:53 +0200 | [diff] [blame] | 15 | #define IU_MSG_NUM_IES 32 |
| 16 | #define IU_MSG_NUM_EXT_IES 32 |
| 17 | |
Harald Welte | 27f9c4a | 2015-08-30 22:47:18 +0200 | [diff] [blame] | 18 | static int hnbgw_hnbap_tx(struct hnb_context *ctx, struct msgb *msg) |
Harald Welte | ee77cff | 2015-08-30 16:57:53 +0200 | [diff] [blame] | 19 | { |
Harald Welte | 7b54e32 | 2015-09-07 22:41:45 +0200 | [diff] [blame] | 20 | if (!msg) |
| 21 | return -EINVAL; |
| 22 | |
Harald Welte | 3f71256 | 2015-09-07 21:53:25 +0200 | [diff] [blame] | 23 | msgb_ppid(msg) = IUH_PPI_HNBAP; |
| 24 | return osmo_wqueue_enqueue(&ctx->wqueue, msg); |
Harald Welte | 27f9c4a | 2015-08-30 22:47:18 +0200 | [diff] [blame] | 25 | } |
Harald Welte | ee77cff | 2015-08-30 16:57:53 +0200 | [diff] [blame] | 26 | |
Harald Welte | 27f9c4a | 2015-08-30 22:47:18 +0200 | [diff] [blame] | 27 | static int hnbgw_tx_hnb_register_acc(struct hnb_context *ctx) |
| 28 | { |
| 29 | HNBRegisterAccept_t accept_out; |
| 30 | struct msgb *msg; |
| 31 | int rc; |
| 32 | |
| 33 | /* Single required response IE: RNC-ID */ |
| 34 | HNBRegisterAcceptIEs_t accept = { |
| 35 | .rnc_id = ctx->gw->config.rnc_id |
| 36 | }; |
| 37 | |
| 38 | /* encode the Information Elements */ |
Harald Welte | 2204f9d | 2015-09-07 21:10:50 +0200 | [diff] [blame] | 39 | memset(&accept_out, 0, sizeof(accept_out)); |
Harald Welte | 27f9c4a | 2015-08-30 22:47:18 +0200 | [diff] [blame] | 40 | rc = hnbap_encode_hnbregisteraccepties(&accept_out, &accept); |
| 41 | if (rc < 0) { |
| 42 | return rc; |
Harald Welte | ee77cff | 2015-08-30 16:57:53 +0200 | [diff] [blame] | 43 | } |
| 44 | |
Harald Welte | 27f9c4a | 2015-08-30 22:47:18 +0200 | [diff] [blame] | 45 | /* generate a successfull outcome PDU */ |
| 46 | msg = hnbap_generate_successful_outcome(ProcedureCode_id_HNBRegister, |
| 47 | Criticality_reject, |
| 48 | &asn_DEF_HNBRegisterAccept, |
| 49 | &accept_out); |
Harald Welte | ee77cff | 2015-08-30 16:57:53 +0200 | [diff] [blame] | 50 | |
Harald Welte | 27f9c4a | 2015-08-30 22:47:18 +0200 | [diff] [blame] | 51 | return hnbgw_hnbap_tx(ctx, msg); |
Harald Welte | ee77cff | 2015-08-30 16:57:53 +0200 | [diff] [blame] | 52 | } |
| 53 | |
| 54 | |
Harald Welte | 27f9c4a | 2015-08-30 22:47:18 +0200 | [diff] [blame] | 55 | static int hnbgw_tx_ue_register_acc(struct ue_context *ue) |
Harald Welte | ba43de4 | 2015-08-29 20:33:16 +0200 | [diff] [blame] | 56 | { |
Harald Welte | 27f9c4a | 2015-08-30 22:47:18 +0200 | [diff] [blame] | 57 | UERegisterAccept_t accept_out; |
| 58 | UERegisterAcceptIEs_t accept; |
| 59 | struct msgb *msg; |
Harald Welte | 10dfc5a | 2015-09-11 01:34:45 +0200 | [diff] [blame] | 60 | uint8_t encoded_imsi[10]; |
| 61 | size_t encoded_imsi_len; |
Harald Welte | 27f9c4a | 2015-08-30 22:47:18 +0200 | [diff] [blame] | 62 | int rc; |
Harald Welte | ba43de4 | 2015-08-29 20:33:16 +0200 | [diff] [blame] | 63 | |
Harald Welte | 10dfc5a | 2015-09-11 01:34:45 +0200 | [diff] [blame] | 64 | encoded_imsi_len = encode_iu_imsi(encoded_imsi, sizeof(encoded_imsi), ue->imsi); |
| 65 | |
Harald Welte | 2204f9d | 2015-09-07 21:10:50 +0200 | [diff] [blame] | 66 | memset(&accept, 0, sizeof(accept)); |
Harald Welte | 10dfc5a | 2015-09-11 01:34:45 +0200 | [diff] [blame] | 67 | accept.uE_Identity.present = UE_Identity_PR_iMSI; |
| 68 | OCTET_STRING_fromBuf(&accept.uE_Identity.choice.iMSI, (const char *)encoded_imsi, encoded_imsi_len); |
Harald Welte | 27f9c4a | 2015-08-30 22:47:18 +0200 | [diff] [blame] | 69 | asn1_u32_to_bitstring(&accept.context_ID, &ue->context_id); |
Harald Welte | ba43de4 | 2015-08-29 20:33:16 +0200 | [diff] [blame] | 70 | |
Harald Welte | 2204f9d | 2015-09-07 21:10:50 +0200 | [diff] [blame] | 71 | memset(&accept_out, 0, sizeof(accept_out)); |
Harald Welte | 27f9c4a | 2015-08-30 22:47:18 +0200 | [diff] [blame] | 72 | rc = hnbap_encode_ueregisteraccepties(&accept_out, &accept); |
| 73 | if (rc < 0) { |
| 74 | return rc; |
Harald Welte | ba43de4 | 2015-08-29 20:33:16 +0200 | [diff] [blame] | 75 | } |
Harald Welte | 27f9c4a | 2015-08-30 22:47:18 +0200 | [diff] [blame] | 76 | |
| 77 | msg = hnbap_generate_successful_outcome(ProcedureCode_id_UERegister, |
| 78 | Criticality_reject, |
| 79 | &asn_DEF_UERegisterAccept, |
| 80 | &accept_out); |
| 81 | return hnbgw_hnbap_tx(ue->hnb, msg); |
Harald Welte | ba43de4 | 2015-08-29 20:33:16 +0200 | [diff] [blame] | 82 | } |
| 83 | |
Harald Welte | 27f9c4a | 2015-08-30 22:47:18 +0200 | [diff] [blame] | 84 | static int hnbgw_rx_hnb_register_req(struct hnb_context *ctx, ANY_t *in) |
Harald Welte | ba43de4 | 2015-08-29 20:33:16 +0200 | [diff] [blame] | 85 | { |
Harald Welte | 27f9c4a | 2015-08-30 22:47:18 +0200 | [diff] [blame] | 86 | HNBRegisterRequestIEs_t ies; |
| 87 | int rc; |
Harald Welte | ba43de4 | 2015-08-29 20:33:16 +0200 | [diff] [blame] | 88 | |
Harald Welte | 27f9c4a | 2015-08-30 22:47:18 +0200 | [diff] [blame] | 89 | rc = hnbap_decode_hnbregisterrequesties(&ies, in); |
| 90 | if (rc < 0) |
| 91 | return rc; |
Harald Welte | ba43de4 | 2015-08-29 20:33:16 +0200 | [diff] [blame] | 92 | |
Harald Welte | a2e6a7a | 2015-08-29 21:47:39 +0200 | [diff] [blame] | 93 | /* copy all identity parameters from the message to ctx */ |
Harald Welte | 27f9c4a | 2015-08-30 22:47:18 +0200 | [diff] [blame] | 94 | asn1_strncpy(ctx->identity_info, &ies.hnB_Identity.hNB_Identity_Info, |
| 95 | sizeof(ctx->identity_info)); |
| 96 | ctx->id.lac = asn1str_to_u16(&ies.lac); |
| 97 | ctx->id.sac = asn1str_to_u16(&ies.sac); |
| 98 | ctx->id.rac = asn1str_to_u8(&ies.rac); |
| 99 | ctx->id.cid = asn1bitstr_to_u32(&ies.cellIdentity); |
Harald Welte | b3dae30 | 2015-08-30 12:20:09 +0200 | [diff] [blame] | 100 | //ctx->id.mcc FIXME |
| 101 | //ctx->id.mnc FIXME |
Harald Welte | a2e6a7a | 2015-08-29 21:47:39 +0200 | [diff] [blame] | 102 | |
Harald Welte | ee77cff | 2015-08-30 16:57:53 +0200 | [diff] [blame] | 103 | DEBUGP(DMAIN, "HNB-REGISTER-REQ from %s\n", ctx->identity_info); |
| 104 | |
Harald Welte | 27f9c4a | 2015-08-30 22:47:18 +0200 | [diff] [blame] | 105 | /* Send HNBRegisterAccept */ |
| 106 | return hnbgw_tx_hnb_register_acc(ctx); |
Harald Welte | ba43de4 | 2015-08-29 20:33:16 +0200 | [diff] [blame] | 107 | } |
| 108 | |
Harald Welte | 27f9c4a | 2015-08-30 22:47:18 +0200 | [diff] [blame] | 109 | static int hnbgw_rx_ue_register_req(struct hnb_context *ctx, ANY_t *in) |
Harald Welte | ba43de4 | 2015-08-29 20:33:16 +0200 | [diff] [blame] | 110 | { |
Harald Welte | 27f9c4a | 2015-08-30 22:47:18 +0200 | [diff] [blame] | 111 | UERegisterRequestIEs_t ies; |
| 112 | struct ue_context *ue; |
Harald Welte | 10dfc5a | 2015-09-11 01:34:45 +0200 | [diff] [blame] | 113 | char imsi[16]; |
Harald Welte | 27f9c4a | 2015-08-30 22:47:18 +0200 | [diff] [blame] | 114 | int rc; |
Harald Welte | ba43de4 | 2015-08-29 20:33:16 +0200 | [diff] [blame] | 115 | |
Harald Welte | 27f9c4a | 2015-08-30 22:47:18 +0200 | [diff] [blame] | 116 | rc = hnbap_decode_ueregisterrequesties(&ies, in); |
| 117 | if (rc < 0) |
| 118 | return rc; |
Harald Welte | ba43de4 | 2015-08-29 20:33:16 +0200 | [diff] [blame] | 119 | |
Harald Welte | 10dfc5a | 2015-09-11 01:34:45 +0200 | [diff] [blame] | 120 | switch (ies.uE_Identity.present) { |
| 121 | case UE_Identity_PR_iMSI: |
| 122 | decode_iu_bcd(imsi, sizeof(imsi), ies.uE_Identity.choice.iMSI.buf, |
| 123 | ies.uE_Identity.choice.iMSI.size); |
| 124 | break; |
| 125 | case UE_Identity_PR_iMSIDS41: |
| 126 | decode_iu_bcd(imsi, sizeof(imsi), ies.uE_Identity.choice.iMSIDS41.buf, |
| 127 | ies.uE_Identity.choice.iMSIDS41.size); |
| 128 | break; |
| 129 | case UE_Identity_PR_iMSIESN: |
| 130 | decode_iu_bcd(imsi, sizeof(imsi), ies.uE_Identity.choice.iMSIESN.iMSIDS41.buf, |
| 131 | ies.uE_Identity.choice.iMSIESN.iMSIDS41.size); |
| 132 | break; |
| 133 | default: |
| 134 | DEBUGP(DMAIN, "UE-REGISTER-REQ without IMSI?!?\n"); |
| 135 | return -1; |
| 136 | } |
Harald Welte | b534e5c | 2015-09-11 00:15:16 +0200 | [diff] [blame] | 137 | |
Harald Welte | 10dfc5a | 2015-09-11 01:34:45 +0200 | [diff] [blame] | 138 | DEBUGP(DMAIN, "UE-REGSITER-REQ ID_type=%d imsi=%s cause=%ld\n", |
| 139 | ies.uE_Identity.present, imsi, ies.registration_Cause); |
| 140 | |
| 141 | ue = ue_context_by_imsi(imsi); |
| 142 | if (!ue) |
| 143 | ue = ue_context_alloc(ctx, imsi); |
Harald Welte | 27f9c4a | 2015-08-30 22:47:18 +0200 | [diff] [blame] | 144 | |
Harald Welte | 27f9c4a | 2015-08-30 22:47:18 +0200 | [diff] [blame] | 145 | /* Send UERegisterAccept */ |
| 146 | return hnbgw_tx_ue_register_acc(ue); |
Harald Welte | ba43de4 | 2015-08-29 20:33:16 +0200 | [diff] [blame] | 147 | } |
| 148 | |
Harald Welte | 3af1db8 | 2015-09-11 17:03:16 +0200 | [diff] [blame] | 149 | static int hnbgw_rx_err_ind(struct hnb_context *hnb, ANY_t *in) |
| 150 | { |
| 151 | ErrorIndicationIEs_t ies; |
| 152 | int rc; |
| 153 | |
| 154 | rc = hnbap_decode_hnbregisterrequesties(&ies, in); |
| 155 | if (rc < 0) |
| 156 | return rc; |
| 157 | |
| 158 | LOGP(DMAIN, LOGL_NOTICE, "HNBAP ERROR.ind, cause: %s\n", |
| 159 | hnbap_cause_str(&ies.cause)); |
| 160 | |
| 161 | return 0; |
| 162 | } |
| 163 | |
Harald Welte | 27f9c4a | 2015-08-30 22:47:18 +0200 | [diff] [blame] | 164 | static int hnbgw_rx_initiating_msg(struct hnb_context *hnb, InitiatingMessage_t *imsg) |
Harald Welte | ba43de4 | 2015-08-29 20:33:16 +0200 | [diff] [blame] | 165 | { |
| 166 | int rc; |
| 167 | |
Harald Welte | b3dae30 | 2015-08-30 12:20:09 +0200 | [diff] [blame] | 168 | switch (imsg->procedureCode) { |
Harald Welte | 27f9c4a | 2015-08-30 22:47:18 +0200 | [diff] [blame] | 169 | case ProcedureCode_id_HNBRegister: /* 8.2 */ |
| 170 | rc = hnbgw_rx_hnb_register_req(hnb, &imsg->value); |
Harald Welte | ba43de4 | 2015-08-29 20:33:16 +0200 | [diff] [blame] | 171 | break; |
Harald Welte | 27f9c4a | 2015-08-30 22:47:18 +0200 | [diff] [blame] | 172 | case ProcedureCode_id_HNBDe_Register: /* 8.3 */ |
Harald Welte | ba43de4 | 2015-08-29 20:33:16 +0200 | [diff] [blame] | 173 | break; |
Harald Welte | 27f9c4a | 2015-08-30 22:47:18 +0200 | [diff] [blame] | 174 | case ProcedureCode_id_UERegister: /* 8.4 */ |
| 175 | rc = hnbgw_rx_ue_register_req(hnb, &imsg->value); |
Harald Welte | ba43de4 | 2015-08-29 20:33:16 +0200 | [diff] [blame] | 176 | break; |
Harald Welte | 27f9c4a | 2015-08-30 22:47:18 +0200 | [diff] [blame] | 177 | case ProcedureCode_id_UEDe_Register: /* 8.5 */ |
Harald Welte | ba43de4 | 2015-08-29 20:33:16 +0200 | [diff] [blame] | 178 | break; |
Harald Welte | 27f9c4a | 2015-08-30 22:47:18 +0200 | [diff] [blame] | 179 | case ProcedureCode_id_ErrorIndication: /* 8.6 */ |
Harald Welte | 3af1db8 | 2015-09-11 17:03:16 +0200 | [diff] [blame] | 180 | rc = hnbgw_rx_err_ind(hnb, &imsg->value); |
| 181 | break; |
Harald Welte | 27f9c4a | 2015-08-30 22:47:18 +0200 | [diff] [blame] | 182 | case ProcedureCode_id_TNLUpdate: /* 8.9 */ |
| 183 | case ProcedureCode_id_HNBConfigTransfer: /* 8.10 */ |
| 184 | case ProcedureCode_id_RelocationComplete: /* 8.11 */ |
| 185 | case ProcedureCode_id_U_RNTIQuery: /* 8.12 */ |
| 186 | case ProcedureCode_id_privateMessage: |
Harald Welte | 3af1db8 | 2015-09-11 17:03:16 +0200 | [diff] [blame] | 187 | LOGP(DMAIN, LOGL_NOTICE, "Unimplemented HNBAP Procedure %u\n", |
| 188 | imsg->procedureCode); |
Harald Welte | ba43de4 | 2015-08-29 20:33:16 +0200 | [diff] [blame] | 189 | break; |
| 190 | default: |
Harald Welte | 3af1db8 | 2015-09-11 17:03:16 +0200 | [diff] [blame] | 191 | LOGP(DMAIN, LOGL_NOTICE, "Unknown HNBAP Procedure %u\n", |
| 192 | imsg->procedureCode); |
Harald Welte | ba43de4 | 2015-08-29 20:33:16 +0200 | [diff] [blame] | 193 | break; |
| 194 | } |
| 195 | } |
| 196 | |
Harald Welte | 27f9c4a | 2015-08-30 22:47:18 +0200 | [diff] [blame] | 197 | static int hnbgw_rx_successful_outcome_msg(struct hnb_context *hnb, SuccessfulOutcome_t *msg) |
Harald Welte | ba43de4 | 2015-08-29 20:33:16 +0200 | [diff] [blame] | 198 | { |
| 199 | |
| 200 | } |
| 201 | |
Harald Welte | 27f9c4a | 2015-08-30 22:47:18 +0200 | [diff] [blame] | 202 | static int hnbgw_rx_unsuccessful_outcome_msg(struct hnb_context *hnb, UnsuccessfulOutcome_t *msg) |
Harald Welte | ba43de4 | 2015-08-29 20:33:16 +0200 | [diff] [blame] | 203 | { |
| 204 | |
| 205 | } |
| 206 | |
| 207 | |
Harald Welte | 27f9c4a | 2015-08-30 22:47:18 +0200 | [diff] [blame] | 208 | static int _hnbgw_hnbap_rx(struct hnb_context *hnb, HNBAP_PDU_t *pdu) |
Harald Welte | ba43de4 | 2015-08-29 20:33:16 +0200 | [diff] [blame] | 209 | { |
Harald Welte | b3dae30 | 2015-08-30 12:20:09 +0200 | [diff] [blame] | 210 | int rc; |
| 211 | |
Harald Welte | ba43de4 | 2015-08-29 20:33:16 +0200 | [diff] [blame] | 212 | /* it's a bit odd that we can't dispatch on procedure code, but |
| 213 | * that's not possible */ |
Harald Welte | 27f9c4a | 2015-08-30 22:47:18 +0200 | [diff] [blame] | 214 | switch (pdu->present) { |
| 215 | case HNBAP_PDU_PR_initiatingMessage: |
| 216 | rc = hnbgw_rx_initiating_msg(hnb, &pdu->choice.initiatingMessage); |
Harald Welte | ba43de4 | 2015-08-29 20:33:16 +0200 | [diff] [blame] | 217 | break; |
Harald Welte | 27f9c4a | 2015-08-30 22:47:18 +0200 | [diff] [blame] | 218 | case HNBAP_PDU_PR_successfulOutcome: |
| 219 | rc = hnbgw_rx_successful_outcome_msg(hnb, &pdu->choice.successfulOutcome); |
Harald Welte | ba43de4 | 2015-08-29 20:33:16 +0200 | [diff] [blame] | 220 | break; |
Harald Welte | 27f9c4a | 2015-08-30 22:47:18 +0200 | [diff] [blame] | 221 | case HNBAP_PDU_PR_unsuccessfulOutcome: |
| 222 | rc = hnbgw_rx_unsuccessful_outcome_msg(hnb, &pdu->choice.unsuccessfulOutcome); |
Harald Welte | ba43de4 | 2015-08-29 20:33:16 +0200 | [diff] [blame] | 223 | break; |
| 224 | default: |
Harald Welte | 3af1db8 | 2015-09-11 17:03:16 +0200 | [diff] [blame] | 225 | LOGP(DMAIN, LOGL_NOTICE, "Unknown HNBAP Presence %u\n", |
| 226 | pdu->present); |
Harald Welte | ba43de4 | 2015-08-29 20:33:16 +0200 | [diff] [blame] | 227 | return -1; |
| 228 | } |
| 229 | } |
| 230 | |
Harald Welte | a2e6a7a | 2015-08-29 21:47:39 +0200 | [diff] [blame] | 231 | int hnbgw_hnbap_rx(struct hnb_context *hnb, struct msgb *msg) |
Harald Welte | ba43de4 | 2015-08-29 20:33:16 +0200 | [diff] [blame] | 232 | { |
Harald Welte | 27f9c4a | 2015-08-30 22:47:18 +0200 | [diff] [blame] | 233 | HNBAP_PDU_t _pdu, *pdu = &_pdu; |
| 234 | asn_dec_rval_t dec_ret; |
Harald Welte | ee77cff | 2015-08-30 16:57:53 +0200 | [diff] [blame] | 235 | int rc; |
| 236 | |
| 237 | /* decode and handle to _hnbgw_hnbap_rx() */ |
| 238 | |
Harald Welte | 2204f9d | 2015-09-07 21:10:50 +0200 | [diff] [blame] | 239 | memset(pdu, 0, sizeof(*pdu)); |
Harald Welte | 27f9c4a | 2015-08-30 22:47:18 +0200 | [diff] [blame] | 240 | dec_ret = aper_decode(NULL, &asn_DEF_HNBAP_PDU, (void **) &pdu, |
| 241 | msg->data, msgb_length(msg), 0, 0); |
| 242 | if (dec_ret.code != RC_OK) { |
| 243 | LOGP(DMAIN, LOGL_ERROR, "Error in ASN.1 decode\n"); |
Harald Welte | ee77cff | 2015-08-30 16:57:53 +0200 | [diff] [blame] | 244 | return rc; |
| 245 | } |
| 246 | |
| 247 | rc = _hnbgw_hnbap_rx(hnb, pdu); |
Harald Welte | ee77cff | 2015-08-30 16:57:53 +0200 | [diff] [blame] | 248 | |
| 249 | return rc; |
Harald Welte | ba43de4 | 2015-08-29 20:33:16 +0200 | [diff] [blame] | 250 | } |
| 251 | |
| 252 | |
| 253 | int hnbgw_hnbap_init(void) |
| 254 | { |
| 255 | |
| 256 | } |