Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 1 | /* gprs_bssgp_pcu.cpp |
| 2 | * |
| 3 | * Copyright (C) 2012 Ivan Klyuchnikov |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or |
| 6 | * modify it under the terms of the GNU General Public License |
| 7 | * as published by the Free Software Foundation; either version 2 |
| 8 | * of the License, or (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software |
| 17 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 18 | */ |
| 19 | |
| 20 | #include <gprs_rlcmac.h> |
| 21 | #include <gprs_bssgp_pcu.h> |
| 22 | #include <pcu_l1_if.h> |
| 23 | |
| 24 | struct sgsn_instance *sgsn; |
| 25 | void *tall_bsc_ctx; |
Andreas Eversberg | 3e372d5 | 2012-07-06 09:28:15 +0200 | [diff] [blame] | 26 | struct bssgp_bvc_ctx *bctx = NULL; |
Andreas Eversberg | bf5a0f6 | 2012-07-06 08:58:22 +0200 | [diff] [blame] | 27 | struct gprs_nsvc *nsvc = NULL; |
| 28 | extern uint16_t spoof_mcc, spoof_mnc; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 29 | |
Ivan Kluchnikov | 5e0df93 | 2012-06-12 15:33:52 +0400 | [diff] [blame] | 30 | int gprs_bssgp_pcu_rx_dl_ud(struct msgb *msg, struct tlv_parsed *tp) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 31 | { |
| 32 | struct bssgp_ud_hdr *budh; |
| 33 | int tfi; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 34 | uint32_t tlli; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 35 | int i = 0; |
Andreas Eversberg | 7d7cf54 | 2012-06-25 09:26:15 +0200 | [diff] [blame] | 36 | uint8_t trx, ts; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 37 | uint8_t *data; |
| 38 | uint16_t len; |
| 39 | struct gprs_rlcmac_tbf *tbf; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 40 | |
| 41 | budh = (struct bssgp_ud_hdr *)msgb_bssgph(msg); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 42 | tlli = ntohl(budh->tlli); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 43 | |
Ivan Kluchnikov | 5e0df93 | 2012-06-12 15:33:52 +0400 | [diff] [blame] | 44 | /* LLC_PDU is mandatory IE */ |
| 45 | if (!TLVP_PRESENT(tp, BSSGP_IE_LLC_PDU)) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 46 | { |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 47 | LOGP(DBSSGP, LOGL_ERROR, "BSSGP TLLI=0x%08x Rx UL-UD missing mandatory IE\n", tlli); |
Ivan Kluchnikov | 5e0df93 | 2012-06-12 15:33:52 +0400 | [diff] [blame] | 48 | return bssgp_tx_status(BSSGP_CAUSE_MISSING_MAND_IE, NULL, msg); |
| 49 | } |
Ivan Kluchnikov | b172b1b | 2012-06-07 01:51:49 +0400 | [diff] [blame] | 50 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 51 | data = (uint8_t *) TLVP_VAL(tp, BSSGP_IE_LLC_PDU); |
| 52 | len = TLVP_LEN(tp, BSSGP_IE_LLC_PDU); |
| 53 | if (len > sizeof(tbf->llc_frame)) |
Ivan Kluchnikov | 5e0df93 | 2012-06-12 15:33:52 +0400 | [diff] [blame] | 54 | { |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 55 | LOGP(DBSSGP, LOGL_ERROR, "BSSGP TLLI=0x%08x Rx UL-UD IE_LLC_PDU too large\n", tlli); |
| 56 | return bssgp_tx_status(BSSGP_CAUSE_COND_IE_ERR, NULL, msg); |
Ivan Kluchnikov | 5e0df93 | 2012-06-12 15:33:52 +0400 | [diff] [blame] | 57 | } |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 58 | LOGP(DBSSGP, LOGL_NOTICE, "LLC PDU = (TLLI=0x%08x) %s\n", tlli, osmo_hexdump(data, len)); |
Ivan Kluchnikov | 5e0df93 | 2012-06-12 15:33:52 +0400 | [diff] [blame] | 59 | |
| 60 | uint16_t imsi_len = 0; |
| 61 | uint8_t *imsi; |
| 62 | if (TLVP_PRESENT(tp, BSSGP_IE_IMSI)) |
| 63 | { |
| 64 | imsi_len = TLVP_LEN(tp, BSSGP_IE_IMSI); |
| 65 | imsi = (uint8_t *) TLVP_VAL(tp, BSSGP_IE_IMSI); |
| 66 | |
| 67 | LOGPC(DBSSGP, LOGL_NOTICE, " IMSI = "); |
| 68 | for (i = 0; i < imsi_len; i++) |
| 69 | { |
| 70 | LOGPC(DBSSGP, LOGL_NOTICE, "%02x", imsi[i]); |
| 71 | } |
| 72 | LOGPC(DBSSGP, LOGL_NOTICE, "\n"); |
| 73 | } |
| 74 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 75 | /* check for existing TBF */ |
| 76 | if ((tbf = tbf_by_tlli(tlli, GPRS_RLCMAC_DL_TBF))) { |
| 77 | LOGP(DRLCMAC, LOGL_NOTICE, "TBF: [DOWNLINK] APPEND TFI: %u TLLI: 0x%08x \n", tbf->tfi, tbf->tlli); |
| 78 | if (tbf->state == GPRS_RLCMAC_WAIT_RELEASE) { |
| 79 | LOGP(DRLCMAC, LOGL_NOTICE, "TBF in WAIT RELEASE state " |
| 80 | "(T3193), so reuse TBF\n"); |
| 81 | memcpy(tbf->llc_frame, data, len); |
| 82 | tbf->llc_length = len; |
| 83 | memset(&tbf->dir.dl, 0, sizeof(tbf->dir.dl)); /* reset |
| 84 | rlc states */ |
| 85 | gprs_rlcmac_trigger_downlink_assignment(tbf, 1); |
| 86 | } else { |
| 87 | /* the TBF exists, so we must write it in the queue */ |
| 88 | struct msgb *llc_msg = msgb_alloc(len, "llc_pdu_queue"); |
| 89 | if (!llc_msg) |
| 90 | return -ENOMEM; |
| 91 | memcpy(msgb_put(llc_msg, len), data, len); |
| 92 | msgb_enqueue(&tbf->llc_queue, llc_msg); |
| 93 | } |
| 94 | } else { |
| 95 | // Create new TBF |
| 96 | tfi = tfi_alloc(&trx, &ts); |
| 97 | if (tfi < 0) { |
| 98 | LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH ressource\n"); |
| 99 | /* FIXME: send reject */ |
| 100 | return -EBUSY; |
| 101 | } |
| 102 | tbf = tbf_alloc(tfi, trx, ts); |
| 103 | tbf->direction = GPRS_RLCMAC_DL_TBF; |
| 104 | tbf->tlli = tlli; |
| 105 | tbf->tlli_valid = 1; |
| 106 | |
| 107 | LOGP(DRLCMAC, LOGL_NOTICE, "TBF: [DOWNLINK] START TFI: %u TLLI: 0x%08x \n", tbf->tfi, tbf->tlli); |
| 108 | |
| 109 | /* new TBF, so put first frame */ |
| 110 | memcpy(tbf->llc_frame, data, len); |
| 111 | tbf->llc_length = len; |
| 112 | |
| 113 | /* trigger downlink assignment and set state to ASSIGN. |
| 114 | * we don't use old_downlink, so the possible uplink is used |
| 115 | * to trigger downlink assignment. if there is no uplink, |
| 116 | * AGCH is used. */ |
| 117 | gprs_rlcmac_trigger_downlink_assignment(tbf, 0); |
| 118 | } |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 119 | |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 120 | return 0; |
Ivan Kluchnikov | b172b1b | 2012-06-07 01:51:49 +0400 | [diff] [blame] | 121 | } |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 122 | /* Receive a BSSGP PDU from a BSS on a PTP BVCI */ |
| 123 | int gprs_bssgp_pcu_rx_ptp(struct msgb *msg, struct tlv_parsed *tp, struct bssgp_bvc_ctx *bctx) |
| 124 | { |
| 125 | struct bssgp_normal_hdr *bgph = (struct bssgp_normal_hdr *) msgb_bssgph(msg); |
| 126 | uint8_t pdu_type = bgph->pdu_type; |
| 127 | unsigned rc = 0; |
| 128 | |
| 129 | /* If traffic is received on a BVC that is marked as blocked, the |
| 130 | * received PDU shall not be accepted and a STATUS PDU (Cause value: |
| 131 | * BVC Blocked) shall be sent to the peer entity on the signalling BVC */ |
| 132 | if (bctx->state & BVC_S_BLOCKED && pdu_type != BSSGP_PDUT_STATUS) |
| 133 | { |
| 134 | uint16_t bvci = msgb_bvci(msg); |
| 135 | LOGP(DBSSGP, LOGL_NOTICE, "rx BVC_S_BLOCKED\n"); |
| 136 | return bssgp_tx_status(BSSGP_CAUSE_BVCI_BLOCKED, &bvci, msg); |
| 137 | } |
| 138 | |
| 139 | switch (pdu_type) { |
| 140 | case BSSGP_PDUT_DL_UNITDATA: |
Ivan Kluchnikov | a9f1ff2 | 2012-05-24 22:25:06 +0400 | [diff] [blame] | 141 | LOGP(DBSSGP, LOGL_NOTICE, "RX: [SGSN->PCU] BSSGP_PDUT_DL_UNITDATA\n"); |
Ivan Kluchnikov | 5e0df93 | 2012-06-12 15:33:52 +0400 | [diff] [blame] | 142 | gprs_bssgp_pcu_rx_dl_ud(msg, tp); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 143 | break; |
| 144 | case BSSGP_PDUT_PAGING_PS: |
| 145 | LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP_PDUT_PAGING_PS\n"); |
| 146 | break; |
| 147 | case BSSGP_PDUT_PAGING_CS: |
| 148 | LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP_PDUT_PAGING_CS\n"); |
| 149 | break; |
| 150 | case BSSGP_PDUT_RA_CAPA_UPDATE_ACK: |
| 151 | LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP_PDUT_RA_CAPA_UPDATE_ACK\n"); |
| 152 | break; |
| 153 | case BSSGP_PDUT_FLOW_CONTROL_BVC_ACK: |
| 154 | LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP_PDUT_FLOW_CONTROL_BVC_ACK\n"); |
| 155 | break; |
| 156 | case BSSGP_PDUT_FLOW_CONTROL_MS_ACK: |
| 157 | LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP_PDUT_FLOW_CONTROL_MS_ACK\n"); |
| 158 | break; |
| 159 | default: |
| 160 | DEBUGP(DBSSGP, "BSSGP BVCI=%u PDU type 0x%02x unknown\n", bctx->bvci, pdu_type); |
| 161 | rc = bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, msg); |
| 162 | break; |
| 163 | } |
| 164 | return rc; |
| 165 | } |
| 166 | |
| 167 | /* Receive a BSSGP PDU from a SGSN on a SIGNALLING BVCI */ |
| 168 | int gprs_bssgp_pcu_rx_sign(struct msgb *msg, struct tlv_parsed *tp, struct bssgp_bvc_ctx *bctx) |
| 169 | { |
| 170 | struct bssgp_normal_hdr *bgph = (struct bssgp_normal_hdr *) msgb_bssgph(msg); |
| 171 | int rc = 0; |
| 172 | switch (bgph->pdu_type) { |
| 173 | case BSSGP_PDUT_STATUS: |
| 174 | /* Some exception has occurred */ |
| 175 | DEBUGP(DBSSGP, "BSSGP BVCI=%u Rx BVC STATUS\n", bctx->bvci); |
| 176 | /* FIXME: send NM_STATUS.ind to NM */ |
| 177 | break; |
| 178 | case BSSGP_PDUT_SUSPEND_ACK: |
| 179 | LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP_PDUT_SUSPEND_ACK\n"); |
| 180 | break; |
| 181 | case BSSGP_PDUT_SUSPEND_NACK: |
| 182 | LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP_PDUT_SUSPEND_NACK\n"); |
| 183 | break; |
| 184 | case BSSGP_PDUT_BVC_RESET_ACK: |
| 185 | LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP_PDUT_BVC_RESET_ACK\n"); |
| 186 | break; |
| 187 | case BSSGP_PDUT_PAGING_PS: |
| 188 | LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP_PDUT_PAGING_PS\n"); |
| 189 | break; |
| 190 | case BSSGP_PDUT_PAGING_CS: |
| 191 | LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP_PDUT_PAGING_CS\n"); |
| 192 | break; |
| 193 | case BSSGP_PDUT_RESUME_ACK: |
| 194 | LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP_PDUT_RESUME_ACK\n"); |
| 195 | break; |
| 196 | case BSSGP_PDUT_RESUME_NACK: |
| 197 | LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP_PDUT_RESUME_NACK\n"); |
| 198 | break; |
| 199 | case BSSGP_PDUT_FLUSH_LL: |
| 200 | LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP_PDUT_FLUSH_LL\n"); |
| 201 | break; |
| 202 | case BSSGP_PDUT_BVC_BLOCK_ACK: |
| 203 | LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP_PDUT_SUSPEND_ACK\n"); |
| 204 | break; |
| 205 | case BSSGP_PDUT_BVC_UNBLOCK_ACK: |
| 206 | LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP_PDUT_BVC_UNBLOCK_ACK\n"); |
| 207 | break; |
| 208 | case BSSGP_PDUT_SGSN_INVOKE_TRACE: |
| 209 | LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP_PDUT_SGSN_INVOKE_TRACE\n"); |
| 210 | break; |
| 211 | default: |
| 212 | DEBUGP(DBSSGP, "BSSGP BVCI=%u Rx PDU type 0x%02x unknown\n", bctx->bvci, bgph->pdu_type); |
| 213 | rc = bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, msg); |
| 214 | break; |
| 215 | } |
| 216 | return rc; |
| 217 | } |
| 218 | |
| 219 | int gprs_bssgp_pcu_rcvmsg(struct msgb *msg) |
| 220 | { |
| 221 | struct bssgp_normal_hdr *bgph = (struct bssgp_normal_hdr *) msgb_bssgph(msg); |
| 222 | struct bssgp_ud_hdr *budh = (struct bssgp_ud_hdr *) msgb_bssgph(msg); |
| 223 | struct tlv_parsed tp; |
| 224 | uint8_t pdu_type = bgph->pdu_type; |
| 225 | uint16_t ns_bvci = msgb_bvci(msg); |
| 226 | int data_len; |
| 227 | int rc = 0; |
Andreas Eversberg | 3e372d5 | 2012-07-06 09:28:15 +0200 | [diff] [blame] | 228 | struct bssgp_bvc_ctx *bctx; |
| 229 | |
| 230 | if (pdu_type == BSSGP_PDUT_STATUS) { |
| 231 | LOGP(DBSSGP, LOGL_NOTICE, "NSEI=%u/BVCI=%u received STATUS\n", |
| 232 | msgb_nsei(msg), ns_bvci); |
| 233 | return 0; |
| 234 | } |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 235 | |
| 236 | /* Identifiers from DOWN: NSEI, BVCI (both in msg->cb) */ |
| 237 | |
| 238 | /* UNITDATA BSSGP headers have TLLI in front */ |
| 239 | if (pdu_type != BSSGP_PDUT_UL_UNITDATA && pdu_type != BSSGP_PDUT_DL_UNITDATA) |
| 240 | { |
| 241 | data_len = msgb_bssgp_len(msg) - sizeof(*bgph); |
| 242 | rc = bssgp_tlv_parse(&tp, bgph->data, data_len); |
| 243 | } |
| 244 | else |
| 245 | { |
| 246 | data_len = msgb_bssgp_len(msg) - sizeof(*budh); |
| 247 | rc = bssgp_tlv_parse(&tp, budh->data, data_len); |
| 248 | } |
| 249 | |
| 250 | /* look-up or create the BTS context for this BVC */ |
| 251 | bctx = btsctx_by_bvci_nsei(ns_bvci, msgb_nsei(msg)); |
| 252 | |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 253 | if (!bctx && pdu_type != BSSGP_PDUT_BVC_RESET_ACK) |
| 254 | { |
| 255 | LOGP(DBSSGP, LOGL_NOTICE, "NSEI=%u/BVCI=%u Rejecting PDU " |
| 256 | "type %u for unknown BVCI\n", msgb_nsei(msg), ns_bvci, |
| 257 | pdu_type); |
| 258 | return bssgp_tx_status(BSSGP_CAUSE_UNKNOWN_BVCI, NULL, msg); |
| 259 | } |
| 260 | |
| 261 | if (bctx) |
| 262 | { |
| 263 | log_set_context(BSC_CTX_BVC, bctx); |
| 264 | rate_ctr_inc(&bctx->ctrg->ctr[BSSGP_CTR_PKTS_IN]); |
| 265 | rate_ctr_add(&bctx->ctrg->ctr[BSSGP_CTR_BYTES_IN], msgb_bssgp_len(msg)); |
| 266 | } |
| 267 | |
| 268 | if (ns_bvci == BVCI_SIGNALLING) |
| 269 | { |
| 270 | LOGP(DBSSGP, LOGL_NOTICE, "rx BVCI_SIGNALLING gprs_bssgp_rx_sign\n"); |
| 271 | rc = gprs_bssgp_pcu_rx_sign(msg, &tp, bctx); |
| 272 | } |
| 273 | else if (ns_bvci == BVCI_PTM) |
| 274 | { |
| 275 | LOGP(DBSSGP, LOGL_NOTICE, "rx BVCI_PTM bssgp_tx_status\n"); |
| 276 | rc = bssgp_tx_status(BSSGP_CAUSE_PDU_INCOMP_FEAT, NULL, msg); |
| 277 | } |
| 278 | else |
| 279 | { |
| 280 | LOGP(DBSSGP, LOGL_NOTICE, "rx BVCI_PTP gprs_bssgp_rx_ptp\n"); |
| 281 | rc = gprs_bssgp_pcu_rx_ptp(msg, &tp, bctx); |
| 282 | } |
| 283 | return rc; |
| 284 | } |
Harald Welte | d679009 | 2012-06-18 12:21:03 +0800 | [diff] [blame] | 285 | |
| 286 | int bssgp_prim_cb(struct osmo_prim_hdr *oph, void *ctx) |
| 287 | { |
| 288 | return 0; |
| 289 | } |
Andreas Eversberg | bf5a0f6 | 2012-07-06 08:58:22 +0200 | [diff] [blame] | 290 | |
| 291 | static int sgsn_ns_cb(enum gprs_ns_evt event, struct gprs_nsvc *nsvc, struct msgb *msg, uint16_t bvci) |
| 292 | { |
| 293 | int rc = 0; |
| 294 | switch (event) { |
| 295 | case GPRS_NS_EVT_UNIT_DATA: |
| 296 | /* hand the message into the BSSGP implementation */ |
| 297 | rc = gprs_bssgp_pcu_rcvmsg(msg); |
| 298 | break; |
| 299 | default: |
| 300 | LOGP(DPCU, LOGL_ERROR, "RLCMAC: Unknown event %u from NS\n", event); |
| 301 | if (msg) |
| 302 | talloc_free(msg); |
| 303 | rc = -EIO; |
| 304 | break; |
| 305 | } |
| 306 | return rc; |
| 307 | } |
| 308 | |
| 309 | static int nsvc_unblocked = 0; |
| 310 | |
| 311 | static int nsvc_signal_cb(unsigned int subsys, unsigned int signal, |
| 312 | void *handler_data, void *signal_data) |
| 313 | { |
| 314 | struct ns_signal_data *nssd; |
| 315 | |
| 316 | if (subsys != SS_L_NS) |
| 317 | return -EINVAL; |
| 318 | |
| 319 | nssd = (struct ns_signal_data *)signal_data; |
| 320 | if (nssd->nsvc != nsvc) { |
| 321 | LOGP(DPCU, LOGL_ERROR, "Signal received of unknown NSVC\n"); |
| 322 | return -EINVAL; |
| 323 | } |
| 324 | |
| 325 | switch (signal) { |
| 326 | case S_NS_UNBLOCK: |
| 327 | if (!nsvc_unblocked) { |
| 328 | nsvc_unblocked = 1; |
| 329 | LOGP(DPCU, LOGL_NOTICE, "NS-VC is unblocked.\n"); |
| 330 | bssgp_tx_bvc_reset(bctx, bctx->bvci, |
| 331 | BSSGP_CAUSE_PROTO_ERR_UNSPEC); |
| 332 | } |
| 333 | break; |
| 334 | case S_NS_BLOCK: |
| 335 | if (nsvc_unblocked) { |
| 336 | nsvc_unblocked = 0; |
| 337 | LOGP(DPCU, LOGL_NOTICE, "NS-VC is blocked.\n"); |
| 338 | } |
| 339 | break; |
| 340 | } |
| 341 | |
| 342 | return 0; |
| 343 | } |
| 344 | |
| 345 | /* create BSSGP/NS layer instances */ |
| 346 | int gprs_bssgp_create(uint32_t sgsn_ip, uint16_t sgsn_port, uint16_t nsei, |
| 347 | uint16_t nsvci, uint16_t bvci, uint16_t mcc, uint16_t mnc, uint16_t lac, |
| 348 | uint16_t rac, uint16_t cell_id) |
| 349 | { |
| 350 | struct sockaddr_in dest; |
| 351 | |
| 352 | if (bctx) |
| 353 | return 0; /* if already created, must return 0: no error */ |
| 354 | |
| 355 | bssgp_nsi = gprs_ns_instantiate(&sgsn_ns_cb, NULL); |
| 356 | if (!bssgp_nsi) { |
| 357 | LOGP(DBSSGP, LOGL_NOTICE, "Failed to create NS instance\n"); |
| 358 | return -EINVAL; |
| 359 | } |
| 360 | gprs_ns_nsip_listen(bssgp_nsi); |
| 361 | |
| 362 | dest.sin_family = AF_INET; |
| 363 | dest.sin_port = htons(sgsn_port); |
| 364 | dest.sin_addr.s_addr = htonl(sgsn_ip); |
| 365 | |
| 366 | nsvc = gprs_ns_nsip_connect(bssgp_nsi, &dest, nsei, nsvci); |
| 367 | if (!nsvc) { |
| 368 | LOGP(DBSSGP, LOGL_NOTICE, "Failed to create NSVCt\n"); |
| 369 | gprs_ns_destroy(bssgp_nsi); |
| 370 | bssgp_nsi = NULL; |
| 371 | return -EINVAL; |
| 372 | } |
| 373 | |
| 374 | bctx = btsctx_alloc(bvci, nsei); |
| 375 | if (!bctx) { |
| 376 | LOGP(DBSSGP, LOGL_NOTICE, "Failed to create BSSGP context\n"); |
| 377 | nsvc = NULL; |
| 378 | gprs_ns_destroy(bssgp_nsi); |
| 379 | bssgp_nsi = NULL; |
| 380 | return -EINVAL; |
| 381 | } |
| 382 | bctx->ra_id.mcc = spoof_mcc ? : mcc; |
| 383 | bctx->ra_id.mnc = spoof_mnc ? : mnc; |
| 384 | bctx->ra_id.lac = lac; |
| 385 | bctx->ra_id.rac = rac; |
| 386 | bctx->cell_id = cell_id; |
| 387 | |
| 388 | osmo_signal_register_handler(SS_L_NS, nsvc_signal_cb, NULL); |
| 389 | |
| 390 | // bssgp_tx_bvc_reset(bctx, bctx->bvci, BSSGP_CAUSE_PROTO_ERR_UNSPEC); |
| 391 | |
| 392 | return 0; |
| 393 | } |
| 394 | |
| 395 | void gprs_bssgp_destroy(void) |
| 396 | { |
| 397 | if (!bssgp_nsi) |
| 398 | return; |
| 399 | |
| 400 | osmo_signal_unregister_handler(SS_L_NS, nsvc_signal_cb, NULL); |
| 401 | |
| 402 | nsvc = NULL; |
| 403 | |
| 404 | /* FIXME: move this to libgb: btsctx_free() */ |
| 405 | llist_del(&bctx->list); |
| 406 | talloc_free(bctx); |
| 407 | bctx = NULL; |
| 408 | |
| 409 | /* FIXME: blocking... */ |
| 410 | |
| 411 | gprs_ns_destroy(bssgp_nsi); |
| 412 | bssgp_nsi = NULL; |
| 413 | } |
| 414 | |