Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 1 | #include <osmocom/core/msgb.h> |
| 2 | #include <osmocom/core/utils.h> |
| 3 | |
| 4 | #include <unistd.h> |
| 5 | #include <errno.h> |
| 6 | #include <string.h> |
| 7 | |
| 8 | #include "asn1helpers.h" |
| 9 | |
| 10 | #include "hnbgw.h" |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 11 | #include "hnbgw_ranap.h" |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 12 | #include "rua_common.h" |
| 13 | #include "rua_ies_defs.h" |
| 14 | |
| 15 | static int hnbgw_rua_tx(struct hnb_context *ctx, struct msgb *msg) |
| 16 | { |
| 17 | if (!msg) |
| 18 | return -EINVAL; |
| 19 | |
| 20 | msgb_ppid(msg) = IUH_PPI_RUA; |
| 21 | return osmo_wqueue_enqueue(&ctx->wqueue, msg); |
| 22 | } |
| 23 | |
Harald Welte | e2e5d4d | 2015-09-10 23:49:45 +0200 | [diff] [blame] | 24 | int rua_tx_udt(struct msgb *inmsg) |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 25 | { |
Harald Welte | e2e5d4d | 2015-09-10 23:49:45 +0200 | [diff] [blame] | 26 | RUA_ConnectionlessTransfer_t out; |
| 27 | RUA_ConnectionlessTransferIEs_t ies; |
| 28 | struct msgb *msg; |
| 29 | int rc; |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 30 | |
Harald Welte | e2e5d4d | 2015-09-10 23:49:45 +0200 | [diff] [blame] | 31 | memset(&ies, 0, sizeof(ies)); |
| 32 | ies.ranaP_Message.buf = inmsg->data; |
| 33 | ies.ranaP_Message.size = msgb_length(inmsg); |
| 34 | |
| 35 | /* FIXME: msgb_free(msg)? ownership not yet clear */ |
| 36 | |
| 37 | memset(&out, 0, sizeof(out)); |
| 38 | rc = rua_encode_connectionlesstransferies(&out, &ies); |
| 39 | if (rc < 0) |
| 40 | return rc; |
| 41 | |
| 42 | msg = rua_generate_initiating_message(RUA_ProcedureCode_id_ConnectionlessTransfer, |
| 43 | RUA_Criticality_reject, |
| 44 | &asn_DEF_RUA_ConnectionlessTransfer, |
| 45 | &out); |
| 46 | msg->dst = inmsg->dst; |
| 47 | |
| 48 | DEBUGP(DMAIN, "transmitting RUA payload of %u bytes\n", msgb_length(msg)); |
| 49 | |
| 50 | return hnbgw_rua_tx(msg->dst, msg); |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 51 | } |
| 52 | |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 53 | static int rua_rx_init_connect(struct msgb *msg, ANY_t *in) |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 54 | { |
| 55 | RUA_ConnectIEs_t ies; |
| 56 | uint32_t context_id; |
| 57 | int rc; |
| 58 | |
| 59 | rc = rua_decode_connecties(&ies, in); |
| 60 | if (rc < 0) |
| 61 | return rc; |
| 62 | |
| 63 | context_id = asn1bitstr_to_u32(&ies.context_ID); |
| 64 | |
| 65 | DEBUGP(DMAIN, "Connect.req(ctx=0x%x, %s)\n", context_id, |
| 66 | ies.establishment_Cause == RUA_Establishment_Cause_emergency_call |
| 67 | ? "emergency" : "normal"); |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 68 | /* FIXME */ |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 69 | } |
| 70 | |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 71 | static int rua_rx_init_disconnect(struct msgb *msg, ANY_t *in) |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 72 | { |
| 73 | RUA_DisconnectIEs_t ies; |
| 74 | uint32_t context_id; |
| 75 | int rc; |
| 76 | |
| 77 | rc = rua_decode_disconnecties(&ies, in); |
| 78 | if (rc < 0) |
| 79 | return rc; |
| 80 | |
| 81 | context_id = asn1bitstr_to_u32(&ies.context_ID); |
| 82 | |
| 83 | DEBUGP(DMAIN, "Disconnect.req(ctx=0x%x,cause=%s)\n", context_id, |
| 84 | rua_cause_str(&ies.cause)); |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 85 | /* FIXME */ |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 86 | } |
| 87 | |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 88 | static int rua_rx_init_dt(struct msgb *msg, ANY_t *in) |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 89 | { |
| 90 | RUA_DirectTransferIEs_t ies; |
| 91 | uint32_t context_id; |
| 92 | int rc; |
| 93 | |
| 94 | rc = rua_decode_directtransferies(&ies, in); |
| 95 | if (rc < 0) |
| 96 | return rc; |
| 97 | |
| 98 | context_id = asn1bitstr_to_u32(&ies.context_ID); |
| 99 | |
| 100 | DEBUGP(DMAIN, "Data.req(ctx=0x%x)\n", context_id); |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 101 | /* FIXME */ |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 102 | |
| 103 | } |
| 104 | |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 105 | static int rua_rx_init_udt(struct msgb *msg, ANY_t *in) |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 106 | { |
| 107 | RUA_ConnectionlessTransferIEs_t ies; |
| 108 | int rc; |
| 109 | |
| 110 | rc = rua_decode_connectionlesstransferies(&ies, in); |
| 111 | if (rc < 0) |
| 112 | return rc; |
| 113 | |
| 114 | DEBUGP(DMAIN, "UData.req()\n"); |
| 115 | |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 116 | /* FIXME: pass on to RANAP */ |
| 117 | rc = hnbgw_ranap_rx(msg, ies.ranaP_Message.buf, ies.ranaP_Message.size); |
| 118 | /* FIXME: what to do with the asn1c-allocated memory */ |
| 119 | |
| 120 | return rc; |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 121 | } |
| 122 | |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 123 | |
| 124 | static int rua_rx_init_err_ind(struct msgb *msg, ANY_t *in) |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 125 | { |
| 126 | RUA_ErrorIndicationIEs_t ies; |
| 127 | int rc; |
| 128 | |
| 129 | rc = rua_decode_errorindicationies(&ies, in); |
| 130 | if (rc < 0) |
| 131 | return rc; |
| 132 | |
| 133 | } |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 134 | |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 135 | static int rua_rx_initiating_msg(struct msgb *msg, RUA_InitiatingMessage_t *imsg) |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 136 | { |
| 137 | int rc; |
| 138 | |
| 139 | switch (imsg->procedureCode) { |
| 140 | case RUA_ProcedureCode_id_Connect: |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 141 | rc = rua_rx_init_connect(msg, &imsg->value); |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 142 | break; |
| 143 | case RUA_ProcedureCode_id_DirectTransfer: |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 144 | rc = rua_rx_init_dt(msg, &imsg->value); |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 145 | break; |
| 146 | case RUA_ProcedureCode_id_Disconnect: |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 147 | rc = rua_rx_init_disconnect(msg, &imsg->value); |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 148 | break; |
| 149 | case RUA_ProcedureCode_id_ConnectionlessTransfer: |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 150 | rc = rua_rx_init_udt(msg, &imsg->value); |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 151 | break; |
| 152 | case RUA_ProcedureCode_id_ErrorIndication: |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 153 | rc = rua_rx_init_err_ind(msg, &imsg->value); |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 154 | break; |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 155 | case RUA_ProcedureCode_id_privateMessage: |
| 156 | break; |
| 157 | default: |
Harald Welte | 64b4ebe | 2015-09-10 19:29:59 +0200 | [diff] [blame] | 158 | return -1; |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 159 | } |
| 160 | } |
| 161 | |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 162 | static int rua_rx_successful_outcome_msg(struct msgb *msg, RUA_SuccessfulOutcome_t *in) |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 163 | { |
| 164 | |
| 165 | } |
| 166 | |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 167 | static int rua_rx_unsuccessful_outcome_msg(struct msgb *msg, RUA_UnsuccessfulOutcome_t *in) |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 168 | { |
| 169 | |
| 170 | } |
| 171 | |
| 172 | |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 173 | static int _hnbgw_rua_rx(struct msgb *msg, RUA_RUA_PDU_t *pdu) |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 174 | { |
| 175 | int rc; |
| 176 | |
| 177 | /* it's a bit odd that we can't dispatch on procedure code, but |
| 178 | * that's not possible */ |
| 179 | switch (pdu->present) { |
| 180 | case RUA_RUA_PDU_PR_initiatingMessage: |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 181 | rc = rua_rx_initiating_msg(msg, &pdu->choice.initiatingMessage); |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 182 | break; |
| 183 | case RUA_RUA_PDU_PR_successfulOutcome: |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 184 | rc = rua_rx_successful_outcome_msg(msg, &pdu->choice.successfulOutcome); |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 185 | break; |
| 186 | case RUA_RUA_PDU_PR_unsuccessfulOutcome: |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 187 | rc = rua_rx_unsuccessful_outcome_msg(msg, &pdu->choice.unsuccessfulOutcome); |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 188 | break; |
| 189 | default: |
| 190 | return -1; |
| 191 | } |
| 192 | } |
| 193 | |
| 194 | int hnbgw_rua_rx(struct hnb_context *hnb, struct msgb *msg) |
| 195 | { |
| 196 | RUA_RUA_PDU_t _pdu, *pdu = &_pdu; |
| 197 | asn_dec_rval_t dec_ret; |
| 198 | int rc; |
| 199 | |
| 200 | /* decode and handle to _hnbgw_hnbap_rx() */ |
| 201 | |
| 202 | memset(pdu, 0, sizeof(*pdu)); |
| 203 | dec_ret = aper_decode(NULL, &asn_DEF_RUA_RUA_PDU, (void **) &pdu, |
| 204 | msg->data, msgb_length(msg), 0, 0); |
| 205 | if (dec_ret.code != RC_OK) { |
| 206 | LOGP(DMAIN, LOGL_ERROR, "Error in ASN.1 decode\n"); |
| 207 | return rc; |
| 208 | } |
| 209 | |
Harald Welte | 350814a | 2015-09-10 22:32:15 +0200 | [diff] [blame] | 210 | rc = _hnbgw_rua_rx(msg, pdu); |
Harald Welte | 318e4d5 | 2015-09-10 18:47:08 +0200 | [diff] [blame] | 211 | |
| 212 | return rc; |
| 213 | } |
| 214 | |
| 215 | |
| 216 | int hnbgw_rua_init(void) |
| 217 | { |
| 218 | |
| 219 | } |