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; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 33 | |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 34 | int8_t tfi; /* must be signed */ |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 35 | uint32_t tlli; |
Andreas Eversberg | e13fa2d | 2012-07-09 17:10:44 +0200 | [diff] [blame] | 36 | int i, j; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 37 | uint8_t *data; |
| 38 | uint16_t len; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 39 | struct gprs_rlcmac_tbf *tbf; |
Andreas Eversberg | 7d7cf54 | 2012-06-25 09:26:15 +0200 | [diff] [blame] | 40 | |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 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 | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 47 | LOGP(DBSSGP, LOGL_NOTICE, "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 | c7e7f68 | 2012-06-29 22:53:15 +0400 | [diff] [blame] | 54 | { |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 55 | LOGP(DBSSGP, LOGL_NOTICE, "BSSGP TLLI=0x%08x Rx UL-UD IE_LLC_PDU too large\n", tlli); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 56 | return bssgp_tx_status(BSSGP_CAUSE_COND_IE_ERR, NULL, msg); |
Ivan Kluchnikov | c7e7f68 | 2012-06-29 22:53:15 +0400 | [diff] [blame] | 57 | } |
Ivan Kluchnikov | c7e7f68 | 2012-06-29 22:53:15 +0400 | [diff] [blame] | 58 | |
Andreas Eversberg | e13fa2d | 2012-07-09 17:10:44 +0200 | [diff] [blame] | 59 | /* read IMSI. if no IMSI exists, use first paging block (any paging), |
| 60 | * because during attachment the IMSI might not be known, so the MS |
| 61 | * will listen to all paging blocks. */ |
| 62 | char imsi[16] = "000"; |
Ivan Kluchnikov | 5e0df93 | 2012-06-12 15:33:52 +0400 | [diff] [blame] | 63 | if (TLVP_PRESENT(tp, BSSGP_IE_IMSI)) |
| 64 | { |
Andreas Eversberg | e13fa2d | 2012-07-09 17:10:44 +0200 | [diff] [blame] | 65 | uint8_t imsi_len = TLVP_LEN(tp, BSSGP_IE_IMSI); |
| 66 | uint8_t *bcd_imsi = (uint8_t *) TLVP_VAL(tp, BSSGP_IE_IMSI); |
| 67 | if ((bcd_imsi[0] & 0x08)) |
| 68 | imsi_len = imsi_len * 2 - 1; |
| 69 | else |
| 70 | imsi_len = (imsi_len - 1) * 2; |
| 71 | for (i = 0, j = 0; j < imsi_len && j < 16; j++) |
Ivan Kluchnikov | 5e0df93 | 2012-06-12 15:33:52 +0400 | [diff] [blame] | 72 | { |
Andreas Eversberg | e13fa2d | 2012-07-09 17:10:44 +0200 | [diff] [blame] | 73 | if (!(j & 1)) { |
| 74 | imsi[j] = (bcd_imsi[i] >> 4) + '0'; |
| 75 | i++; |
| 76 | } else |
| 77 | imsi[j] = (bcd_imsi[i] & 0xf) + '0'; |
Ivan Kluchnikov | 5e0df93 | 2012-06-12 15:33:52 +0400 | [diff] [blame] | 78 | } |
Andreas Eversberg | e13fa2d | 2012-07-09 17:10:44 +0200 | [diff] [blame] | 79 | imsi[j] = '\0'; |
Ivan Kluchnikov | 5e0df93 | 2012-06-12 15:33:52 +0400 | [diff] [blame] | 80 | } |
Andreas Eversberg | 51ab134 | 2012-07-13 14:52:50 +0200 | [diff] [blame] | 81 | |
| 82 | /* parse ms radio access capability */ |
| 83 | uint8_t ms_class = 0; |
| 84 | if (TLVP_PRESENT(tp, BSSGP_IE_MS_RADIO_ACCESS_CAP)) |
| 85 | { |
| 86 | bitvec *block; |
| 87 | uint8_t cap_len = TLVP_LEN(tp, BSSGP_IE_MS_RADIO_ACCESS_CAP); |
| 88 | uint8_t *cap = (uint8_t *) TLVP_VAL(tp, BSSGP_IE_MS_RADIO_ACCESS_CAP); |
| 89 | unsigned rp = 0; |
| 90 | |
| 91 | block = bitvec_alloc(cap_len); |
| 92 | bitvec_unpack(block, cap); |
| 93 | bitvec_read_field(block, rp, 4); // Access Technology Type |
| 94 | bitvec_read_field(block, rp, 7); // Length of Access Capabilities |
| 95 | bitvec_read_field(block, rp, 3); // RF Power Capability |
| 96 | if (bitvec_read_field(block, rp, 1)) // A5 Bits Present |
| 97 | bitvec_read_field(block, rp, 7); // A5 Bits |
| 98 | bitvec_read_field(block, rp, 1); // ES IND |
| 99 | bitvec_read_field(block, rp, 1); // PS |
| 100 | bitvec_read_field(block, rp, 1); // VGCS |
| 101 | bitvec_read_field(block, rp, 1); // VBS |
| 102 | if (bitvec_read_field(block, rp, 1)) { // Multislot Cap Present |
| 103 | if (bitvec_read_field(block, rp, 1)) // HSCSD Present |
| 104 | bitvec_read_field(block, rp, 5); // Class |
| 105 | if (bitvec_read_field(block, rp, 1)) { // GPRS Present |
| 106 | ms_class = bitvec_read_field(block, rp, 5); // Class |
| 107 | bitvec_read_field(block, rp, 1); // Ext. |
| 108 | } |
| 109 | if (bitvec_read_field(block, rp, 1)) // SMS Present |
| 110 | bitvec_read_field(block, rp, 4); // SMS Value |
| 111 | bitvec_read_field(block, rp, 4); // SMS Value |
| 112 | } |
| 113 | } |
Andreas Eversberg | e13fa2d | 2012-07-09 17:10:44 +0200 | [diff] [blame] | 114 | LOGP(DBSSGP, LOGL_INFO, "LLC [SGSN -> PCU] = TLLI: 0x%08x IMSI: %s len: %d\n", tlli, imsi, len); |
Ivan Kluchnikov | 5e0df93 | 2012-06-12 15:33:52 +0400 | [diff] [blame] | 115 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 116 | /* check for existing TBF */ |
| 117 | if ((tbf = tbf_by_tlli(tlli, GPRS_RLCMAC_DL_TBF))) { |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 118 | LOGP(DRLCMAC, LOGL_INFO, "TBF: APPEND TFI: %u TLLI: 0x%08x\n", tbf->tfi, tbf->tlli); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 119 | if (tbf->state == GPRS_RLCMAC_WAIT_RELEASE) { |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 120 | LOGP(DRLCMAC, LOGL_DEBUG, "TBF in WAIT RELEASE state " |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 121 | "(T3193), so reuse TBF\n"); |
| 122 | memcpy(tbf->llc_frame, data, len); |
| 123 | tbf->llc_length = len; |
| 124 | memset(&tbf->dir.dl, 0, sizeof(tbf->dir.dl)); /* reset |
| 125 | rlc states */ |
Andreas Eversberg | 592e04a | 2012-07-15 06:25:37 +0200 | [diff] [blame] | 126 | if (!tbf->ms_class && ms_class) |
| 127 | tbf->ms_class = ms_class; |
| 128 | tbf_update(tbf); |
Andreas Eversberg | e13fa2d | 2012-07-09 17:10:44 +0200 | [diff] [blame] | 129 | gprs_rlcmac_trigger_downlink_assignment(tbf, 1, NULL); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 130 | } else { |
| 131 | /* the TBF exists, so we must write it in the queue */ |
| 132 | struct msgb *llc_msg = msgb_alloc(len, "llc_pdu_queue"); |
| 133 | if (!llc_msg) |
| 134 | return -ENOMEM; |
| 135 | memcpy(msgb_put(llc_msg, len), data, len); |
| 136 | msgb_enqueue(&tbf->llc_queue, llc_msg); |
Andreas Eversberg | 592e04a | 2012-07-15 06:25:37 +0200 | [diff] [blame] | 137 | /* set ms class for updating TBF */ |
| 138 | if (!tbf->ms_class && ms_class) |
| 139 | tbf->ms_class = ms_class; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 140 | } |
| 141 | } else { |
Andreas Eversberg | 592e04a | 2012-07-15 06:25:37 +0200 | [diff] [blame] | 142 | uint8_t trx, ts, use_trx, first_ts, ta, ss; |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 143 | |
| 144 | /* check for uplink data, so we copy our informations */ |
| 145 | if ((tbf = tbf_by_tlli(tlli, GPRS_RLCMAC_UL_TBF))) { |
| 146 | use_trx = tbf->trx; |
| 147 | first_ts = tbf->first_ts; |
Andreas Eversberg | 592e04a | 2012-07-15 06:25:37 +0200 | [diff] [blame] | 148 | ta = tbf->ta; |
| 149 | ss = 0; |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 150 | } else { |
| 151 | use_trx = -1; |
| 152 | first_ts = -1; |
Andreas Eversberg | 592e04a | 2012-07-15 06:25:37 +0200 | [diff] [blame] | 153 | ta = 0; /* FIXME: initial TA */ |
| 154 | ss = 1; /* PCH assignment only allows one timeslot */ |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 155 | } |
| 156 | |
| 157 | // Create new TBF (any TRX) |
| 158 | tfi = tfi_alloc(GPRS_RLCMAC_DL_TBF, &trx, &ts, use_trx, first_ts); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 159 | if (tfi < 0) { |
| 160 | LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH ressource\n"); |
| 161 | /* FIXME: send reject */ |
| 162 | return -EBUSY; |
| 163 | } |
Andreas Eversberg | 51ab134 | 2012-07-13 14:52:50 +0200 | [diff] [blame] | 164 | /* set number of downlink slots according to multislot class */ |
Andreas Eversberg | 592e04a | 2012-07-15 06:25:37 +0200 | [diff] [blame] | 165 | tbf = tbf_alloc(tbf, GPRS_RLCMAC_DL_TBF, tfi, trx, ts, ms_class, |
| 166 | ss); |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 167 | if (!tbf) { |
| 168 | LOGP(DRLCMAC, LOGL_NOTICE, "No PDCH ressource\n"); |
| 169 | /* FIXME: send reject */ |
| 170 | return -EBUSY; |
| 171 | } |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 172 | tbf->tlli = tlli; |
| 173 | tbf->tlli_valid = 1; |
Andreas Eversberg | 06f96cd | 2012-07-15 07:12:36 +0200 | [diff] [blame] | 174 | tbf->ta = ta; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 175 | |
Andreas Eversberg | b0c7ea7 | 2012-07-13 14:46:03 +0200 | [diff] [blame] | 176 | LOGP(DRLCMAC, LOGL_DEBUG, "TBF: [DOWNLINK] START TFI: %d TLLI: 0x%08x \n", tbf->tfi, tbf->tlli); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 177 | |
| 178 | /* new TBF, so put first frame */ |
| 179 | memcpy(tbf->llc_frame, data, len); |
| 180 | tbf->llc_length = len; |
| 181 | |
| 182 | /* trigger downlink assignment and set state to ASSIGN. |
| 183 | * we don't use old_downlink, so the possible uplink is used |
| 184 | * to trigger downlink assignment. if there is no uplink, |
| 185 | * AGCH is used. */ |
Andreas Eversberg | e13fa2d | 2012-07-09 17:10:44 +0200 | [diff] [blame] | 186 | gprs_rlcmac_trigger_downlink_assignment(tbf, 0, imsi); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 187 | } |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 188 | |
Andreas Eversberg | 5dac2f0 | 2012-06-27 15:52:04 +0200 | [diff] [blame] | 189 | return 0; |
Ivan Kluchnikov | c7e7f68 | 2012-06-29 22:53:15 +0400 | [diff] [blame] | 190 | } |
Ivan Kluchnikov | a9e6dc5 | 2012-06-17 08:30:06 +0400 | [diff] [blame] | 191 | |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 192 | /* Receive a BSSGP PDU from a BSS on a PTP BVCI */ |
| 193 | int gprs_bssgp_pcu_rx_ptp(struct msgb *msg, struct tlv_parsed *tp, struct bssgp_bvc_ctx *bctx) |
| 194 | { |
| 195 | struct bssgp_normal_hdr *bgph = (struct bssgp_normal_hdr *) msgb_bssgph(msg); |
| 196 | uint8_t pdu_type = bgph->pdu_type; |
| 197 | unsigned rc = 0; |
| 198 | |
| 199 | /* If traffic is received on a BVC that is marked as blocked, the |
| 200 | * received PDU shall not be accepted and a STATUS PDU (Cause value: |
| 201 | * BVC Blocked) shall be sent to the peer entity on the signalling BVC */ |
| 202 | if (bctx->state & BVC_S_BLOCKED && pdu_type != BSSGP_PDUT_STATUS) |
| 203 | { |
| 204 | uint16_t bvci = msgb_bvci(msg); |
| 205 | LOGP(DBSSGP, LOGL_NOTICE, "rx BVC_S_BLOCKED\n"); |
| 206 | return bssgp_tx_status(BSSGP_CAUSE_BVCI_BLOCKED, &bvci, msg); |
| 207 | } |
| 208 | |
| 209 | switch (pdu_type) { |
| 210 | case BSSGP_PDUT_DL_UNITDATA: |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 211 | LOGP(DBSSGP, LOGL_DEBUG, "RX: [SGSN->PCU] BSSGP_PDUT_DL_UNITDATA\n"); |
Ivan Kluchnikov | 5e0df93 | 2012-06-12 15:33:52 +0400 | [diff] [blame] | 212 | gprs_bssgp_pcu_rx_dl_ud(msg, tp); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 213 | break; |
| 214 | case BSSGP_PDUT_PAGING_PS: |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 215 | LOGP(DBSSGP, LOGL_DEBUG, "rx BSSGP_PDUT_PAGING_PS\n"); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 216 | break; |
| 217 | case BSSGP_PDUT_PAGING_CS: |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 218 | LOGP(DBSSGP, LOGL_DEBUG, "rx BSSGP_PDUT_PAGING_CS\n"); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 219 | break; |
| 220 | case BSSGP_PDUT_RA_CAPA_UPDATE_ACK: |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 221 | LOGP(DBSSGP, LOGL_DEBUG, "rx BSSGP_PDUT_RA_CAPA_UPDATE_ACK\n"); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 222 | break; |
| 223 | case BSSGP_PDUT_FLOW_CONTROL_BVC_ACK: |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 224 | LOGP(DBSSGP, LOGL_DEBUG, "rx BSSGP_PDUT_FLOW_CONTROL_BVC_ACK\n"); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 225 | break; |
| 226 | case BSSGP_PDUT_FLOW_CONTROL_MS_ACK: |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 227 | LOGP(DBSSGP, LOGL_DEBUG, "rx BSSGP_PDUT_FLOW_CONTROL_MS_ACK\n"); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 228 | break; |
| 229 | default: |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 230 | LOGP(DBSSGP, LOGL_NOTICE, "BSSGP BVCI=%u PDU type 0x%02x unknown\n", bctx->bvci, pdu_type); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 231 | rc = bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, msg); |
| 232 | break; |
| 233 | } |
| 234 | return rc; |
| 235 | } |
| 236 | |
| 237 | /* Receive a BSSGP PDU from a SGSN on a SIGNALLING BVCI */ |
| 238 | int gprs_bssgp_pcu_rx_sign(struct msgb *msg, struct tlv_parsed *tp, struct bssgp_bvc_ctx *bctx) |
| 239 | { |
| 240 | struct bssgp_normal_hdr *bgph = (struct bssgp_normal_hdr *) msgb_bssgph(msg); |
| 241 | int rc = 0; |
| 242 | switch (bgph->pdu_type) { |
| 243 | case BSSGP_PDUT_STATUS: |
| 244 | /* Some exception has occurred */ |
| 245 | DEBUGP(DBSSGP, "BSSGP BVCI=%u Rx BVC STATUS\n", bctx->bvci); |
| 246 | /* FIXME: send NM_STATUS.ind to NM */ |
| 247 | break; |
| 248 | case BSSGP_PDUT_SUSPEND_ACK: |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 249 | LOGP(DBSSGP, LOGL_DEBUG, "rx BSSGP_PDUT_SUSPEND_ACK\n"); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 250 | break; |
| 251 | case BSSGP_PDUT_SUSPEND_NACK: |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 252 | LOGP(DBSSGP, LOGL_DEBUG, "rx BSSGP_PDUT_SUSPEND_NACK\n"); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 253 | break; |
| 254 | case BSSGP_PDUT_BVC_RESET_ACK: |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 255 | LOGP(DBSSGP, LOGL_DEBUG, "rx BSSGP_PDUT_BVC_RESET_ACK\n"); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 256 | break; |
| 257 | case BSSGP_PDUT_PAGING_PS: |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 258 | LOGP(DBSSGP, LOGL_DEBUG, "rx BSSGP_PDUT_PAGING_PS\n"); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 259 | break; |
| 260 | case BSSGP_PDUT_PAGING_CS: |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 261 | LOGP(DBSSGP, LOGL_DEBUG, "rx BSSGP_PDUT_PAGING_CS\n"); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 262 | break; |
| 263 | case BSSGP_PDUT_RESUME_ACK: |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 264 | LOGP(DBSSGP, LOGL_DEBUG, "rx BSSGP_PDUT_RESUME_ACK\n"); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 265 | break; |
| 266 | case BSSGP_PDUT_RESUME_NACK: |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 267 | LOGP(DBSSGP, LOGL_DEBUG, "rx BSSGP_PDUT_RESUME_NACK\n"); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 268 | break; |
| 269 | case BSSGP_PDUT_FLUSH_LL: |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 270 | LOGP(DBSSGP, LOGL_DEBUG, "rx BSSGP_PDUT_FLUSH_LL\n"); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 271 | break; |
| 272 | case BSSGP_PDUT_BVC_BLOCK_ACK: |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 273 | LOGP(DBSSGP, LOGL_DEBUG, "rx BSSGP_PDUT_SUSPEND_ACK\n"); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 274 | break; |
| 275 | case BSSGP_PDUT_BVC_UNBLOCK_ACK: |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 276 | LOGP(DBSSGP, LOGL_DEBUG, "rx BSSGP_PDUT_BVC_UNBLOCK_ACK\n"); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 277 | break; |
| 278 | case BSSGP_PDUT_SGSN_INVOKE_TRACE: |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 279 | LOGP(DBSSGP, LOGL_DEBUG, "rx BSSGP_PDUT_SGSN_INVOKE_TRACE\n"); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 280 | break; |
| 281 | default: |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 282 | LOGP(DBSSGP, LOGL_NOTICE, "BSSGP BVCI=%u Rx PDU type 0x%02x unknown\n", bctx->bvci, bgph->pdu_type); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 283 | rc = bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, msg); |
| 284 | break; |
| 285 | } |
| 286 | return rc; |
| 287 | } |
| 288 | |
| 289 | int gprs_bssgp_pcu_rcvmsg(struct msgb *msg) |
| 290 | { |
| 291 | struct bssgp_normal_hdr *bgph = (struct bssgp_normal_hdr *) msgb_bssgph(msg); |
| 292 | struct bssgp_ud_hdr *budh = (struct bssgp_ud_hdr *) msgb_bssgph(msg); |
| 293 | struct tlv_parsed tp; |
| 294 | uint8_t pdu_type = bgph->pdu_type; |
| 295 | uint16_t ns_bvci = msgb_bvci(msg); |
| 296 | int data_len; |
| 297 | int rc = 0; |
Andreas Eversberg | 3e372d5 | 2012-07-06 09:28:15 +0200 | [diff] [blame] | 298 | struct bssgp_bvc_ctx *bctx; |
| 299 | |
| 300 | if (pdu_type == BSSGP_PDUT_STATUS) { |
| 301 | LOGP(DBSSGP, LOGL_NOTICE, "NSEI=%u/BVCI=%u received STATUS\n", |
| 302 | msgb_nsei(msg), ns_bvci); |
| 303 | return 0; |
| 304 | } |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 305 | |
| 306 | /* Identifiers from DOWN: NSEI, BVCI (both in msg->cb) */ |
| 307 | |
| 308 | /* UNITDATA BSSGP headers have TLLI in front */ |
| 309 | if (pdu_type != BSSGP_PDUT_UL_UNITDATA && pdu_type != BSSGP_PDUT_DL_UNITDATA) |
| 310 | { |
| 311 | data_len = msgb_bssgp_len(msg) - sizeof(*bgph); |
| 312 | rc = bssgp_tlv_parse(&tp, bgph->data, data_len); |
| 313 | } |
| 314 | else |
| 315 | { |
| 316 | data_len = msgb_bssgp_len(msg) - sizeof(*budh); |
| 317 | rc = bssgp_tlv_parse(&tp, budh->data, data_len); |
| 318 | } |
| 319 | |
| 320 | /* look-up or create the BTS context for this BVC */ |
| 321 | bctx = btsctx_by_bvci_nsei(ns_bvci, msgb_nsei(msg)); |
| 322 | |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 323 | if (!bctx && pdu_type != BSSGP_PDUT_BVC_RESET_ACK) |
| 324 | { |
| 325 | LOGP(DBSSGP, LOGL_NOTICE, "NSEI=%u/BVCI=%u Rejecting PDU " |
| 326 | "type %u for unknown BVCI\n", msgb_nsei(msg), ns_bvci, |
| 327 | pdu_type); |
| 328 | return bssgp_tx_status(BSSGP_CAUSE_UNKNOWN_BVCI, NULL, msg); |
| 329 | } |
| 330 | |
| 331 | if (bctx) |
| 332 | { |
| 333 | log_set_context(BSC_CTX_BVC, bctx); |
| 334 | rate_ctr_inc(&bctx->ctrg->ctr[BSSGP_CTR_PKTS_IN]); |
| 335 | rate_ctr_add(&bctx->ctrg->ctr[BSSGP_CTR_BYTES_IN], msgb_bssgp_len(msg)); |
| 336 | } |
| 337 | |
| 338 | if (ns_bvci == BVCI_SIGNALLING) |
| 339 | { |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 340 | LOGP(DBSSGP, LOGL_DEBUG, "rx BVCI_SIGNALLING gprs_bssgp_rx_sign\n"); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 341 | rc = gprs_bssgp_pcu_rx_sign(msg, &tp, bctx); |
| 342 | } |
| 343 | else if (ns_bvci == BVCI_PTM) |
| 344 | { |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 345 | LOGP(DBSSGP, LOGL_DEBUG, "rx BVCI_PTM bssgp_tx_status\n"); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 346 | rc = bssgp_tx_status(BSSGP_CAUSE_PDU_INCOMP_FEAT, NULL, msg); |
| 347 | } |
| 348 | else |
| 349 | { |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 350 | LOGP(DBSSGP, LOGL_DEBUG, "rx BVCI_PTP gprs_bssgp_rx_ptp\n"); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 351 | rc = gprs_bssgp_pcu_rx_ptp(msg, &tp, bctx); |
| 352 | } |
| 353 | return rc; |
| 354 | } |
Harald Welte | 477e79e | 2012-06-18 12:21:03 +0800 | [diff] [blame] | 355 | |
| 356 | int bssgp_prim_cb(struct osmo_prim_hdr *oph, void *ctx) |
| 357 | { |
| 358 | return 0; |
| 359 | } |
Andreas Eversberg | bf5a0f6 | 2012-07-06 08:58:22 +0200 | [diff] [blame] | 360 | |
| 361 | static int sgsn_ns_cb(enum gprs_ns_evt event, struct gprs_nsvc *nsvc, struct msgb *msg, uint16_t bvci) |
| 362 | { |
| 363 | int rc = 0; |
| 364 | switch (event) { |
| 365 | case GPRS_NS_EVT_UNIT_DATA: |
| 366 | /* hand the message into the BSSGP implementation */ |
| 367 | rc = gprs_bssgp_pcu_rcvmsg(msg); |
| 368 | break; |
| 369 | default: |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 370 | LOGP(DPCU, LOGL_NOTICE, "RLCMAC: Unknown event %u from NS\n", event); |
Andreas Eversberg | bf5a0f6 | 2012-07-06 08:58:22 +0200 | [diff] [blame] | 371 | if (msg) |
| 372 | talloc_free(msg); |
| 373 | rc = -EIO; |
| 374 | break; |
| 375 | } |
| 376 | return rc; |
| 377 | } |
| 378 | |
| 379 | static int nsvc_unblocked = 0; |
| 380 | |
| 381 | static int nsvc_signal_cb(unsigned int subsys, unsigned int signal, |
| 382 | void *handler_data, void *signal_data) |
| 383 | { |
| 384 | struct ns_signal_data *nssd; |
| 385 | |
| 386 | if (subsys != SS_L_NS) |
| 387 | return -EINVAL; |
| 388 | |
| 389 | nssd = (struct ns_signal_data *)signal_data; |
| 390 | if (nssd->nsvc != nsvc) { |
| 391 | LOGP(DPCU, LOGL_ERROR, "Signal received of unknown NSVC\n"); |
| 392 | return -EINVAL; |
| 393 | } |
| 394 | |
| 395 | switch (signal) { |
| 396 | case S_NS_UNBLOCK: |
| 397 | if (!nsvc_unblocked) { |
| 398 | nsvc_unblocked = 1; |
| 399 | LOGP(DPCU, LOGL_NOTICE, "NS-VC is unblocked.\n"); |
| 400 | bssgp_tx_bvc_reset(bctx, bctx->bvci, |
| 401 | BSSGP_CAUSE_PROTO_ERR_UNSPEC); |
| 402 | } |
| 403 | break; |
| 404 | case S_NS_BLOCK: |
| 405 | if (nsvc_unblocked) { |
| 406 | nsvc_unblocked = 0; |
| 407 | LOGP(DPCU, LOGL_NOTICE, "NS-VC is blocked.\n"); |
| 408 | } |
| 409 | break; |
| 410 | } |
| 411 | |
| 412 | return 0; |
| 413 | } |
| 414 | |
| 415 | /* create BSSGP/NS layer instances */ |
| 416 | int gprs_bssgp_create(uint32_t sgsn_ip, uint16_t sgsn_port, uint16_t nsei, |
| 417 | uint16_t nsvci, uint16_t bvci, uint16_t mcc, uint16_t mnc, uint16_t lac, |
| 418 | uint16_t rac, uint16_t cell_id) |
| 419 | { |
| 420 | struct sockaddr_in dest; |
| 421 | |
| 422 | if (bctx) |
| 423 | return 0; /* if already created, must return 0: no error */ |
| 424 | |
| 425 | bssgp_nsi = gprs_ns_instantiate(&sgsn_ns_cb, NULL); |
| 426 | if (!bssgp_nsi) { |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 427 | LOGP(DBSSGP, LOGL_ERROR, "Failed to create NS instance\n"); |
Andreas Eversberg | bf5a0f6 | 2012-07-06 08:58:22 +0200 | [diff] [blame] | 428 | return -EINVAL; |
| 429 | } |
| 430 | gprs_ns_nsip_listen(bssgp_nsi); |
| 431 | |
| 432 | dest.sin_family = AF_INET; |
| 433 | dest.sin_port = htons(sgsn_port); |
| 434 | dest.sin_addr.s_addr = htonl(sgsn_ip); |
| 435 | |
| 436 | nsvc = gprs_ns_nsip_connect(bssgp_nsi, &dest, nsei, nsvci); |
| 437 | if (!nsvc) { |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 438 | LOGP(DBSSGP, LOGL_ERROR, "Failed to create NSVCt\n"); |
Andreas Eversberg | bf5a0f6 | 2012-07-06 08:58:22 +0200 | [diff] [blame] | 439 | gprs_ns_destroy(bssgp_nsi); |
| 440 | bssgp_nsi = NULL; |
| 441 | return -EINVAL; |
| 442 | } |
| 443 | |
| 444 | bctx = btsctx_alloc(bvci, nsei); |
| 445 | if (!bctx) { |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 446 | LOGP(DBSSGP, LOGL_ERROR, "Failed to create BSSGP context\n"); |
Andreas Eversberg | bf5a0f6 | 2012-07-06 08:58:22 +0200 | [diff] [blame] | 447 | nsvc = NULL; |
| 448 | gprs_ns_destroy(bssgp_nsi); |
| 449 | bssgp_nsi = NULL; |
| 450 | return -EINVAL; |
| 451 | } |
| 452 | bctx->ra_id.mcc = spoof_mcc ? : mcc; |
| 453 | bctx->ra_id.mnc = spoof_mnc ? : mnc; |
| 454 | bctx->ra_id.lac = lac; |
| 455 | bctx->ra_id.rac = rac; |
| 456 | bctx->cell_id = cell_id; |
| 457 | |
| 458 | osmo_signal_register_handler(SS_L_NS, nsvc_signal_cb, NULL); |
| 459 | |
| 460 | // bssgp_tx_bvc_reset(bctx, bctx->bvci, BSSGP_CAUSE_PROTO_ERR_UNSPEC); |
| 461 | |
| 462 | return 0; |
| 463 | } |
| 464 | |
| 465 | void gprs_bssgp_destroy(void) |
| 466 | { |
| 467 | if (!bssgp_nsi) |
| 468 | return; |
| 469 | |
| 470 | osmo_signal_unregister_handler(SS_L_NS, nsvc_signal_cb, NULL); |
| 471 | |
| 472 | nsvc = NULL; |
| 473 | |
| 474 | /* FIXME: move this to libgb: btsctx_free() */ |
| 475 | llist_del(&bctx->list); |
| 476 | talloc_free(bctx); |
| 477 | bctx = NULL; |
| 478 | |
| 479 | /* FIXME: blocking... */ |
| 480 | |
| 481 | gprs_ns_destroy(bssgp_nsi); |
| 482 | bssgp_nsi = NULL; |
| 483 | } |
| 484 | |