Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 1 | /* gprs_bssgp_pcu.cpp |
| 2 | * |
| 3 | * Copyright (C) 2012 Ivan Klyuchnikov |
Holger Hans Peter Freyther | 416ce69 | 2013-08-22 08:44:04 +0200 | [diff] [blame] | 4 | * Copyright (C) 2013 by Holger Hans Peter Freyther |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License |
| 8 | * as published by the Free Software Foundation; either version 2 |
| 9 | * of the License, or (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 19 | */ |
| 20 | |
| 21 | #include <gprs_rlcmac.h> |
| 22 | #include <gprs_bssgp_pcu.h> |
| 23 | #include <pcu_l1_if.h> |
Max | 1187a77 | 2018-01-26 13:31:42 +0100 | [diff] [blame] | 24 | #include <gprs_debug.h> |
Holger Hans Peter Freyther | 67ed34e | 2013-10-17 17:01:54 +0200 | [diff] [blame] | 25 | #include <bts.h> |
Holger Hans Peter Freyther | 17c31ce | 2013-08-24 18:31:27 +0200 | [diff] [blame] | 26 | #include <tbf.h> |
Max | 1187a77 | 2018-01-26 13:31:42 +0100 | [diff] [blame] | 27 | #include <gprs_coding_scheme.h> |
Max | 6dc90b8 | 2018-02-19 17:17:28 +0100 | [diff] [blame] | 28 | #include <pdch.h> |
Max | 136ebcc | 2019-03-05 14:59:03 +0100 | [diff] [blame] | 29 | |
| 30 | extern "C" { |
Vadim Yanitskiy | 6170ac0 | 2019-07-24 16:44:13 +0700 | [diff] [blame] | 31 | #include <osmocom/gsm/protocol/gsm_23_003.h> |
Max | 136ebcc | 2019-03-05 14:59:03 +0100 | [diff] [blame] | 32 | #include <osmocom/core/utils.h> |
| 33 | #include "coding_scheme.h" |
| 34 | } |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 35 | |
Jacob Erlbeck | 1e96af6 | 2015-03-17 08:11:25 +0100 | [diff] [blame] | 36 | #define BSSGP_TIMER_T1 30 /* Guards the (un)blocking procedures */ |
| 37 | #define BSSGP_TIMER_T2 30 /* Guards the reset procedure */ |
| 38 | |
Jacob Erlbeck | 3d62fc5 | 2015-04-30 15:01:15 +0200 | [diff] [blame] | 39 | /* Tuning parameters for BSSGP flow control */ |
| 40 | #define FC_DEFAULT_LIFE_TIME_SECS 10 /* experimental value, 10s */ |
| 41 | #define FC_MS_BUCKET_SIZE_BY_BMAX(bmax) ((bmax) / 2 + 500) /* experimental */ |
| 42 | #define FC_FALLBACK_BVC_BUCKET_SIZE 2000 /* e.g. on R = 0, value taken from PCAP files */ |
| 43 | #define FC_MS_MAX_RX_SLOTS 4 /* limit MS default R to 4 TS per MS */ |
| 44 | |
| 45 | /* Constants for BSSGP flow control */ |
| 46 | #define FC_MAX_BUCKET_LEAK_RATE (6553500 / 8) /* Byte/s */ |
| 47 | #define FC_MAX_BUCKET_SIZE 6553500 /* Octets */ |
| 48 | |
Holger Hans Peter Freyther | e8d9a5f | 2013-07-28 19:11:20 +0200 | [diff] [blame] | 49 | static struct gprs_bssgp_pcu the_pcu = { 0, }; |
Holger Hans Peter Freyther | 90f08ef | 2013-07-13 12:45:44 +0200 | [diff] [blame] | 50 | |
Andreas Eversberg | 71cce91 | 2013-01-16 13:49:00 +0100 | [diff] [blame] | 51 | extern void *tall_pcu_ctx; |
Andreas Eversberg | bf5a0f6 | 2012-07-06 08:58:22 +0200 | [diff] [blame] | 52 | extern uint16_t spoof_mcc, spoof_mnc; |
Neels Hofmeyr | bdc55fa | 2018-02-21 00:39:07 +0100 | [diff] [blame] | 53 | extern bool spoof_mnc_3_digits; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 54 | |
Andreas Eversberg | cd8a83a | 2012-09-23 06:41:21 +0200 | [diff] [blame] | 55 | static void bvc_timeout(void *_priv); |
Harald Welte | b26854c | 2019-02-21 17:17:07 +0100 | [diff] [blame] | 56 | static int gprs_ns_reconnect(struct gprs_nsvc *nsvc); |
Andreas Eversberg | cd8a83a | 2012-09-23 06:41:21 +0200 | [diff] [blame] | 57 | |
Pau Espin Pedrol | 7490622 | 2018-03-17 01:43:12 +0100 | [diff] [blame] | 58 | #if 0 |
Jacob Erlbeck | 4a07a3b | 2016-01-20 12:22:07 +0100 | [diff] [blame] | 59 | static int parse_ra_cap(struct tlv_parsed *tp, MS_Radio_Access_capability_t *rac) |
Holger Hans Peter Freyther | 98fe945 | 2013-07-13 15:23:58 +0200 | [diff] [blame] | 60 | { |
| 61 | bitvec *block; |
Holger Hans Peter Freyther | 98fe945 | 2013-07-13 15:23:58 +0200 | [diff] [blame] | 62 | uint8_t cap_len; |
| 63 | uint8_t *cap; |
| 64 | |
Jacob Erlbeck | 4a07a3b | 2016-01-20 12:22:07 +0100 | [diff] [blame] | 65 | memset(rac, 0, sizeof(*rac)); |
| 66 | |
Holger Hans Peter Freyther | 98fe945 | 2013-07-13 15:23:58 +0200 | [diff] [blame] | 67 | if (!TLVP_PRESENT(tp, BSSGP_IE_MS_RADIO_ACCESS_CAP)) |
Jacob Erlbeck | 4a07a3b | 2016-01-20 12:22:07 +0100 | [diff] [blame] | 68 | return -EINVAL; |
Holger Hans Peter Freyther | 98fe945 | 2013-07-13 15:23:58 +0200 | [diff] [blame] | 69 | |
| 70 | cap_len = TLVP_LEN(tp, BSSGP_IE_MS_RADIO_ACCESS_CAP); |
| 71 | cap = (uint8_t *) TLVP_VAL(tp, BSSGP_IE_MS_RADIO_ACCESS_CAP); |
| 72 | |
Jacob Erlbeck | 4a07a3b | 2016-01-20 12:22:07 +0100 | [diff] [blame] | 73 | LOGP(DBSSGP, LOGL_DEBUG, "Got BSSGP RA Capability of size %d\n", cap_len); |
| 74 | |
Alexander Couzens | ccde5c9 | 2017-02-04 03:10:08 +0100 | [diff] [blame] | 75 | block = bitvec_alloc(cap_len, tall_pcu_ctx); |
Holger Hans Peter Freyther | 98fe945 | 2013-07-13 15:23:58 +0200 | [diff] [blame] | 76 | bitvec_unpack(block, cap); |
Jacob Erlbeck | 4a07a3b | 2016-01-20 12:22:07 +0100 | [diff] [blame] | 77 | |
| 78 | /* TS 24.008, 10.5.5.12a */ |
| 79 | decode_gsm_ra_cap(block, rac); |
Holger Hans Peter Freyther | 98fe945 | 2013-07-13 15:23:58 +0200 | [diff] [blame] | 80 | |
| 81 | bitvec_free(block); |
Jacob Erlbeck | 4a07a3b | 2016-01-20 12:22:07 +0100 | [diff] [blame] | 82 | return 0; |
Holger Hans Peter Freyther | 98fe945 | 2013-07-13 15:23:58 +0200 | [diff] [blame] | 83 | } |
Pau Espin Pedrol | 7490622 | 2018-03-17 01:43:12 +0100 | [diff] [blame] | 84 | #endif |
Holger Hans Peter Freyther | 98fe945 | 2013-07-13 15:23:58 +0200 | [diff] [blame] | 85 | |
Holger Hans Peter Freyther | 90d5df4 | 2013-07-28 21:14:15 +0200 | [diff] [blame] | 86 | static 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] | 87 | { |
| 88 | struct bssgp_ud_hdr *budh; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 89 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 90 | uint32_t tlli; |
Jacob Erlbeck | 9399046 | 2015-05-15 15:50:43 +0200 | [diff] [blame] | 91 | uint32_t tlli_old = 0; |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 92 | uint8_t *data; |
| 93 | uint16_t len; |
Vadim Yanitskiy | 2c076bc | 2019-07-24 18:31:19 +0700 | [diff] [blame] | 94 | char imsi[OSMO_IMSI_BUF_SIZE] = "000"; |
Jacob Erlbeck | 4a07a3b | 2016-01-20 12:22:07 +0100 | [diff] [blame] | 95 | uint8_t ms_class = 0; |
| 96 | uint8_t egprs_ms_class = 0; |
Vadim Yanitskiy | 6170ac0 | 2019-07-24 16:44:13 +0700 | [diff] [blame] | 97 | int rc; |
Jacob Erlbeck | 741d25c | 2016-01-20 13:38:15 +0100 | [diff] [blame] | 98 | #if 0 |
Jacob Erlbeck | 4a07a3b | 2016-01-20 12:22:07 +0100 | [diff] [blame] | 99 | MS_Radio_Access_capability_t rac; |
Jacob Erlbeck | 741d25c | 2016-01-20 13:38:15 +0100 | [diff] [blame] | 100 | #endif |
Andreas Eversberg | 7d7cf54 | 2012-06-25 09:26:15 +0200 | [diff] [blame] | 101 | |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 102 | budh = (struct bssgp_ud_hdr *)msgb_bssgph(msg); |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 103 | tlli = ntohl(budh->tlli); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 104 | |
Ivan Kluchnikov | 5e0df93 | 2012-06-12 15:33:52 +0400 | [diff] [blame] | 105 | /* LLC_PDU is mandatory IE */ |
| 106 | if (!TLVP_PRESENT(tp, BSSGP_IE_LLC_PDU)) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 107 | { |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 108 | 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] | 109 | return bssgp_tx_status(BSSGP_CAUSE_MISSING_MAND_IE, NULL, msg); |
| 110 | } |
Ivan Kluchnikov | b172b1b | 2012-06-07 01:51:49 +0400 | [diff] [blame] | 111 | |
Andreas Eversberg | e6228b3 | 2012-07-03 13:36:03 +0200 | [diff] [blame] | 112 | data = (uint8_t *) TLVP_VAL(tp, BSSGP_IE_LLC_PDU); |
| 113 | len = TLVP_LEN(tp, BSSGP_IE_LLC_PDU); |
Holger Hans Peter Freyther | 28e5378 | 2013-11-06 20:23:56 +0100 | [diff] [blame] | 114 | if (len > sizeof(gprs_llc::frame)) |
Ivan Kluchnikov | c7e7f68 | 2012-06-29 22:53:15 +0400 | [diff] [blame] | 115 | { |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 116 | 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] | 117 | return bssgp_tx_status(BSSGP_CAUSE_COND_IE_ERR, NULL, msg); |
Ivan Kluchnikov | c7e7f68 | 2012-06-29 22:53:15 +0400 | [diff] [blame] | 118 | } |
Ivan Kluchnikov | c7e7f68 | 2012-06-29 22:53:15 +0400 | [diff] [blame] | 119 | |
Andreas Eversberg | e13fa2d | 2012-07-09 17:10:44 +0200 | [diff] [blame] | 120 | /* read IMSI. if no IMSI exists, use first paging block (any paging), |
| 121 | * because during attachment the IMSI might not be known, so the MS |
| 122 | * will listen to all paging blocks. */ |
Vadim Yanitskiy | aad87b6 | 2019-07-24 16:36:45 +0700 | [diff] [blame] | 123 | if (TLVP_PRESENT(tp, BSSGP_IE_IMSI)) |
| 124 | { |
Vadim Yanitskiy | 6170ac0 | 2019-07-24 16:44:13 +0700 | [diff] [blame] | 125 | /* gsm48_mi_to_string() returns number of bytes written, including '\0' */ |
| 126 | rc = gsm48_mi_to_string(imsi, sizeof(imsi), TLVP_VAL(tp, BSSGP_IE_IMSI), |
| 127 | TLVP_LEN(tp, BSSGP_IE_IMSI)); |
| 128 | if (rc != GSM23003_IMSI_MAX_DIGITS + 1) { |
| 129 | LOGP(DBSSGP, LOGL_NOTICE, "Failed to parse IMSI IE (rc=%d)\n", rc); |
| 130 | return bssgp_tx_status(BSSGP_CAUSE_COND_IE_ERR, NULL, msg); |
| 131 | } |
Vadim Yanitskiy | aad87b6 | 2019-07-24 16:36:45 +0700 | [diff] [blame] | 132 | } |
Andreas Eversberg | 51ab134 | 2012-07-13 14:52:50 +0200 | [diff] [blame] | 133 | |
Jacob Erlbeck | 741d25c | 2016-01-20 13:38:15 +0100 | [diff] [blame] | 134 | #if 0 /* Do not rely on this IE. TODO: make this configurable */ |
Andreas Eversberg | 51ab134 | 2012-07-13 14:52:50 +0200 | [diff] [blame] | 135 | /* parse ms radio access capability */ |
Jacob Erlbeck | 4a07a3b | 2016-01-20 12:22:07 +0100 | [diff] [blame] | 136 | if (parse_ra_cap(tp, &rac) >= 0) { |
| 137 | /* Get the EGPRS class from the RA capability */ |
| 138 | ms_class = Decoding::get_ms_class_by_capability(&rac); |
| 139 | egprs_ms_class = |
| 140 | Decoding::get_egprs_ms_class_by_capability(&rac); |
| 141 | LOGP(DBSSGP, LOGL_DEBUG, "Got downlink MS class %d/%d\n", |
| 142 | ms_class, egprs_ms_class); |
| 143 | } |
Jacob Erlbeck | 741d25c | 2016-01-20 13:38:15 +0100 | [diff] [blame] | 144 | #endif |
Andreas Eversberg | 51ab134 | 2012-07-13 14:52:50 +0200 | [diff] [blame] | 145 | |
Andreas Eversberg | 24131bf | 2012-07-21 11:09:58 +0200 | [diff] [blame] | 146 | /* get lifetime */ |
| 147 | uint16_t delay_csec = 0xffff; |
| 148 | if (TLVP_PRESENT(tp, BSSGP_IE_PDU_LIFETIME)) |
| 149 | { |
| 150 | uint8_t lt_len = TLVP_LEN(tp, BSSGP_IE_PDU_LIFETIME); |
Andreas Eversberg | 24131bf | 2012-07-21 11:09:58 +0200 | [diff] [blame] | 151 | if (lt_len == 2) |
Harald Welte | 49b7822 | 2017-06-11 11:27:59 +0200 | [diff] [blame] | 152 | delay_csec = tlvp_val16be(tp, BSSGP_IE_PDU_LIFETIME); |
Andreas Eversberg | 24131bf | 2012-07-21 11:09:58 +0200 | [diff] [blame] | 153 | else |
| 154 | LOGP(DBSSGP, LOGL_NOTICE, "BSSGP invalid length of " |
| 155 | "PDU_LIFETIME IE\n"); |
| 156 | } else |
| 157 | LOGP(DBSSGP, LOGL_NOTICE, "BSSGP missing mandatory " |
| 158 | "PDU_LIFETIME IE\n"); |
| 159 | |
Jacob Erlbeck | 9399046 | 2015-05-15 15:50:43 +0200 | [diff] [blame] | 160 | /* get optional TLLI old */ |
| 161 | if (TLVP_PRESENT(tp, BSSGP_IE_TLLI)) |
| 162 | { |
| 163 | uint8_t tlli_len = TLVP_LEN(tp, BSSGP_IE_PDU_LIFETIME); |
Jacob Erlbeck | 9399046 | 2015-05-15 15:50:43 +0200 | [diff] [blame] | 164 | if (tlli_len == 2) |
Harald Welte | 49b7822 | 2017-06-11 11:27:59 +0200 | [diff] [blame] | 165 | tlli_old = tlvp_val16be(tp, BSSGP_IE_TLLI); |
Jacob Erlbeck | 9399046 | 2015-05-15 15:50:43 +0200 | [diff] [blame] | 166 | else |
| 167 | LOGP(DBSSGP, LOGL_NOTICE, "BSSGP invalid length of " |
| 168 | "TLLI (old) IE\n"); |
| 169 | } |
| 170 | |
Andreas Eversberg | e13fa2d | 2012-07-09 17:10:44 +0200 | [diff] [blame] | 171 | 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] | 172 | |
Jacob Erlbeck | 9399046 | 2015-05-15 15:50:43 +0200 | [diff] [blame] | 173 | return gprs_rlcmac_dl_tbf::handle(the_pcu.bts, tlli, tlli_old, imsi, |
Jacob Erlbeck | 14e00f8 | 2015-11-27 18:10:39 +0100 | [diff] [blame] | 174 | ms_class, egprs_ms_class, delay_csec, data, len); |
Ivan Kluchnikov | c7e7f68 | 2012-06-29 22:53:15 +0400 | [diff] [blame] | 175 | } |
Ivan Kluchnikov | a9e6dc5 | 2012-06-17 08:30:06 +0400 | [diff] [blame] | 176 | |
Andreas Eversberg | 8c3680d | 2012-10-08 12:30:56 +0200 | [diff] [blame] | 177 | int gprs_bssgp_pcu_rx_paging_ps(struct msgb *msg, struct tlv_parsed *tp) |
| 178 | { |
| 179 | char imsi[16]; |
| 180 | uint8_t *ptmsi = (uint8_t *) TLVP_VAL(tp, BSSGP_IE_TMSI); |
| 181 | uint16_t ptmsi_len = TLVP_LEN(tp, BSSGP_IE_TMSI); |
Vadim Yanitskiy | 6170ac0 | 2019-07-24 16:44:13 +0700 | [diff] [blame] | 182 | int rc; |
Andreas Eversberg | 8c3680d | 2012-10-08 12:30:56 +0200 | [diff] [blame] | 183 | |
| 184 | LOGP(DBSSGP, LOGL_NOTICE, " P-TMSI = "); |
| 185 | for (int i = 0; i < ptmsi_len; i++) |
| 186 | { |
| 187 | LOGPC(DBSSGP, LOGL_NOTICE, "%02x", ptmsi[i]); |
| 188 | } |
| 189 | LOGPC(DBSSGP, LOGL_NOTICE, "\n"); |
| 190 | |
Max | f3038e7 | 2019-03-19 15:39:05 +0100 | [diff] [blame] | 191 | if (!TLVP_PRESENT(tp, BSSGP_IE_IMSI)) { |
Andreas Eversberg | 8c3680d | 2012-10-08 12:30:56 +0200 | [diff] [blame] | 192 | LOGP(DBSSGP, LOGL_ERROR, "No IMSI\n"); |
| 193 | return -EINVAL; |
| 194 | } |
| 195 | |
Vadim Yanitskiy | 6170ac0 | 2019-07-24 16:44:13 +0700 | [diff] [blame] | 196 | /* gsm48_mi_to_string() returns number of bytes written, including '\0' */ |
| 197 | rc = gsm48_mi_to_string(imsi, sizeof(imsi), TLVP_VAL(tp, BSSGP_IE_IMSI), |
| 198 | TLVP_LEN(tp, BSSGP_IE_IMSI)); |
| 199 | if (rc != GSM23003_IMSI_MAX_DIGITS + 1) { |
| 200 | LOGP(DBSSGP, LOGL_NOTICE, "Failed to parse IMSI IE (rc=%d)\n", rc); |
| 201 | return bssgp_tx_status(BSSGP_CAUSE_COND_IE_ERR, NULL, msg); |
| 202 | } |
Max | f3038e7 | 2019-03-19 15:39:05 +0100 | [diff] [blame] | 203 | |
Andreas Eversberg | 8c3680d | 2012-10-08 12:30:56 +0200 | [diff] [blame] | 204 | return gprs_rlcmac_paging_request(ptmsi, ptmsi_len, imsi); |
| 205 | } |
| 206 | |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 207 | /* Receive a BSSGP PDU from a BSS on a PTP BVCI */ |
Holger Hans Peter Freyther | 90d5df4 | 2013-07-28 21:14:15 +0200 | [diff] [blame] | 208 | static int gprs_bssgp_pcu_rx_ptp(struct msgb *msg, struct tlv_parsed *tp, struct bssgp_bvc_ctx *bctx) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 209 | { |
| 210 | struct bssgp_normal_hdr *bgph = (struct bssgp_normal_hdr *) msgb_bssgph(msg); |
Max | a49475b | 2017-05-23 17:53:38 +0200 | [diff] [blame] | 211 | enum bssgp_pdu_type pdu_type = (enum bssgp_pdu_type) bgph->pdu_type; |
Harald Welte | 05d7b5d | 2017-07-29 10:16:44 +0200 | [diff] [blame] | 212 | int bvci = bctx ? bctx->bvci : -1; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 213 | unsigned rc = 0; |
| 214 | |
Andreas Eversberg | ba1cd9b | 2012-07-25 09:14:09 +0200 | [diff] [blame] | 215 | if (!bctx) |
| 216 | return -EINVAL; |
| 217 | |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 218 | /* If traffic is received on a BVC that is marked as blocked, the |
| 219 | * received PDU shall not be accepted and a STATUS PDU (Cause value: |
| 220 | * BVC Blocked) shall be sent to the peer entity on the signalling BVC */ |
| 221 | if (bctx->state & BVC_S_BLOCKED && pdu_type != BSSGP_PDUT_STATUS) |
| 222 | { |
| 223 | uint16_t bvci = msgb_bvci(msg); |
| 224 | LOGP(DBSSGP, LOGL_NOTICE, "rx BVC_S_BLOCKED\n"); |
| 225 | return bssgp_tx_status(BSSGP_CAUSE_BVCI_BLOCKED, &bvci, msg); |
| 226 | } |
| 227 | |
| 228 | switch (pdu_type) { |
Harald Welte | 05d7b5d | 2017-07-29 10:16:44 +0200 | [diff] [blame] | 229 | case BSSGP_PDUT_STATUS: |
| 230 | /* already handled in libosmogb */ |
| 231 | OSMO_ASSERT(0); |
| 232 | break; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 233 | case BSSGP_PDUT_DL_UNITDATA: |
Harald Welte | 05d7b5d | 2017-07-29 10:16:44 +0200 | [diff] [blame] | 234 | LOGP(DBSSGP, LOGL_DEBUG, "Rx BSSGP BVCI=%d (PTP) DL_UNITDATA\n", bvci); |
Holger Hans Peter Freyther | 416ce69 | 2013-08-22 08:44:04 +0200 | [diff] [blame] | 235 | if (the_pcu.on_dl_unit_data) |
| 236 | the_pcu.on_dl_unit_data(&the_pcu, msg, tp); |
Ivan Kluchnikov | 5e0df93 | 2012-06-12 15:33:52 +0400 | [diff] [blame] | 237 | gprs_bssgp_pcu_rx_dl_ud(msg, tp); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 238 | break; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 239 | case BSSGP_PDUT_FLOW_CONTROL_BVC_ACK: |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 240 | case BSSGP_PDUT_FLOW_CONTROL_MS_ACK: |
Harald Welte | 05d7b5d | 2017-07-29 10:16:44 +0200 | [diff] [blame] | 241 | LOGP(DBSSGP, LOGL_DEBUG, "Rx BSSGP BVCI=%d (PTP) %s\n", |
| 242 | bvci, bssgp_pdu_str(pdu_type)); |
| 243 | break; |
| 244 | case BSSGP_PDUT_PAGING_PS: |
| 245 | case BSSGP_PDUT_PAGING_CS: |
| 246 | case BSSGP_PDUT_RA_CAPABILITY: |
| 247 | case BSSGP_PDUT_RA_CAPA_UPDATE_ACK: |
| 248 | LOGP(DBSSGP, LOGL_INFO, "Rx BSSGP BVCI=%d (PTP) PDU type %s not implemented\n", |
| 249 | bvci, bssgp_pdu_str(pdu_type)); |
| 250 | break; |
| 251 | /* See TS 08.18 5.4.1 */ |
| 252 | case BSSGP_PDUT_SUSPEND: |
| 253 | case BSSGP_PDUT_SUSPEND_ACK: |
| 254 | case BSSGP_PDUT_SUSPEND_NACK: |
| 255 | case BSSGP_PDUT_RESUME: |
| 256 | case BSSGP_PDUT_RESUME_ACK: |
| 257 | case BSSGP_PDUT_RESUME_NACK: |
| 258 | case BSSGP_PDUT_FLUSH_LL: |
| 259 | case BSSGP_PDUT_FLUSH_LL_ACK: |
| 260 | case BSSGP_PDUT_LLC_DISCARD: |
| 261 | case BSSGP_PDUT_BVC_BLOCK: |
| 262 | case BSSGP_PDUT_BVC_BLOCK_ACK: |
| 263 | case BSSGP_PDUT_BVC_UNBLOCK: |
| 264 | case BSSGP_PDUT_BVC_UNBLOCK_ACK: |
| 265 | case BSSGP_PDUT_BVC_RESET: |
| 266 | case BSSGP_PDUT_BVC_RESET_ACK: |
| 267 | case BSSGP_PDUT_SGSN_INVOKE_TRACE: |
| 268 | LOGP(DBSSGP, LOGL_NOTICE, "Rx BSSGP BVCI=%u (PTP) PDU type %s unexpected at PTP\n", |
| 269 | bctx->bvci, bssgp_pdu_str(pdu_type)); |
| 270 | rc = bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, msg); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 271 | break; |
| 272 | default: |
Harald Welte | 05d7b5d | 2017-07-29 10:16:44 +0200 | [diff] [blame] | 273 | LOGP(DBSSGP, LOGL_NOTICE, "Rx BSSGP BVCI=%u (PTP) PDU type %s unknown\n", |
Harald Welte | 356ac61 | 2017-05-25 19:05:32 +0200 | [diff] [blame] | 274 | bctx->bvci, bssgp_pdu_str(pdu_type)); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 275 | rc = bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, msg); |
| 276 | break; |
| 277 | } |
| 278 | return rc; |
| 279 | } |
| 280 | |
| 281 | /* Receive a BSSGP PDU from a SGSN on a SIGNALLING BVCI */ |
Holger Hans Peter Freyther | 90d5df4 | 2013-07-28 21:14:15 +0200 | [diff] [blame] | 282 | static int gprs_bssgp_pcu_rx_sign(struct msgb *msg, struct tlv_parsed *tp, struct bssgp_bvc_ctx *bctx) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 283 | { |
| 284 | struct bssgp_normal_hdr *bgph = (struct bssgp_normal_hdr *) msgb_bssgph(msg); |
Max | a49475b | 2017-05-23 17:53:38 +0200 | [diff] [blame] | 285 | enum bssgp_pdu_type pdu_type = (enum bssgp_pdu_type) bgph->pdu_type; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 286 | int rc = 0; |
Jacob Erlbeck | 09fdf66 | 2015-06-11 11:35:58 +0200 | [diff] [blame] | 287 | int bvci = bctx ? bctx->bvci : -1; |
Max | a49475b | 2017-05-23 17:53:38 +0200 | [diff] [blame] | 288 | switch (pdu_type) { |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 289 | case BSSGP_PDUT_STATUS: |
Harald Welte | 05d7b5d | 2017-07-29 10:16:44 +0200 | [diff] [blame] | 290 | /* already handled in libosmogb */ |
| 291 | OSMO_ASSERT(0); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 292 | break; |
Holger Hans Peter Freyther | a9744de | 2013-07-28 19:01:20 +0200 | [diff] [blame] | 293 | case BSSGP_PDUT_SUSPEND_ACK: |
Harald Welte | 05d7b5d | 2017-07-29 10:16:44 +0200 | [diff] [blame] | 294 | case BSSGP_PDUT_RESUME_ACK: |
| 295 | case BSSGP_PDUT_BVC_BLOCK_ACK: |
| 296 | LOGP(DBSSGP, LOGL_DEBUG, "Rx BSSGP BVCI=%d (SIGN) %s\n", |
| 297 | bvci, bssgp_pdu_str(pdu_type)); |
Holger Hans Peter Freyther | a9744de | 2013-07-28 19:01:20 +0200 | [diff] [blame] | 298 | break; |
| 299 | case BSSGP_PDUT_BVC_RESET_ACK: |
Harald Welte | 05d7b5d | 2017-07-29 10:16:44 +0200 | [diff] [blame] | 300 | LOGP(DBSSGP, LOGL_NOTICE, "Rx BSSGP BVCI=%d (SIGN) BVC_RESET_ACK\n", bvci); |
Holger Hans Peter Freyther | a9744de | 2013-07-28 19:01:20 +0200 | [diff] [blame] | 301 | if (!the_pcu.bvc_sig_reset) |
| 302 | the_pcu.bvc_sig_reset = 1; |
| 303 | else |
| 304 | the_pcu.bvc_reset = 1; |
| 305 | bvc_timeout(NULL); |
| 306 | break; |
| 307 | case BSSGP_PDUT_PAGING_PS: |
Holger Hans Peter Freyther | a9744de | 2013-07-28 19:01:20 +0200 | [diff] [blame] | 308 | gprs_bssgp_pcu_rx_paging_ps(msg, tp); |
| 309 | break; |
Holger Hans Peter Freyther | a9744de | 2013-07-28 19:01:20 +0200 | [diff] [blame] | 310 | case BSSGP_PDUT_BVC_UNBLOCK_ACK: |
Harald Welte | 05d7b5d | 2017-07-29 10:16:44 +0200 | [diff] [blame] | 311 | LOGP(DBSSGP, LOGL_NOTICE, "Rx BSSGP BVCI=%d (SIGN) BVC_UNBLOCK_ACK\n", bvci); |
Holger Hans Peter Freyther | a9744de | 2013-07-28 19:01:20 +0200 | [diff] [blame] | 312 | the_pcu.bvc_unblocked = 1; |
Holger Hans Peter Freyther | c0f1644 | 2013-08-22 08:40:33 +0200 | [diff] [blame] | 313 | if (the_pcu.on_unblock_ack) |
| 314 | the_pcu.on_unblock_ack(&the_pcu); |
Holger Hans Peter Freyther | a9744de | 2013-07-28 19:01:20 +0200 | [diff] [blame] | 315 | bvc_timeout(NULL); |
| 316 | break; |
Harald Welte | 05d7b5d | 2017-07-29 10:16:44 +0200 | [diff] [blame] | 317 | case BSSGP_PDUT_SUSPEND_NACK: |
| 318 | case BSSGP_PDUT_RESUME_NACK: |
| 319 | case BSSGP_PDUT_PAGING_CS: |
| 320 | case BSSGP_PDUT_FLUSH_LL: |
Holger Hans Peter Freyther | a9744de | 2013-07-28 19:01:20 +0200 | [diff] [blame] | 321 | case BSSGP_PDUT_SGSN_INVOKE_TRACE: |
Harald Welte | 05d7b5d | 2017-07-29 10:16:44 +0200 | [diff] [blame] | 322 | LOGP(DBSSGP, LOGL_INFO, "Rx BSSGP BVCI=%d (SIGN) PDU type %s not implemented\n", |
| 323 | bvci, bssgp_pdu_str(pdu_type)); |
| 324 | break; |
| 325 | /* See TS 08.18 5.4.1 */ |
| 326 | case BSSGP_PDUT_UL_UNITDATA: |
| 327 | case BSSGP_PDUT_DL_UNITDATA: |
| 328 | case BSSGP_PDUT_RA_CAPABILITY: |
| 329 | case BSSGP_PDUT_PTM_UNITDATA: |
| 330 | case BSSGP_PDUT_RA_CAPA_UDPATE: |
| 331 | case BSSGP_PDUT_RA_CAPA_UPDATE_ACK: |
| 332 | case BSSGP_PDUT_RADIO_STATUS: |
| 333 | case BSSGP_PDUT_FLOW_CONTROL_BVC: |
| 334 | case BSSGP_PDUT_FLOW_CONTROL_BVC_ACK: |
| 335 | case BSSGP_PDUT_FLOW_CONTROL_MS: |
| 336 | case BSSGP_PDUT_FLOW_CONTROL_MS_ACK: |
| 337 | case BSSGP_PDUT_DOWNLOAD_BSS_PFC: |
| 338 | case BSSGP_PDUT_CREATE_BSS_PFC: |
| 339 | case BSSGP_PDUT_CREATE_BSS_PFC_ACK: |
| 340 | case BSSGP_PDUT_CREATE_BSS_PFC_NACK: |
| 341 | case BSSGP_PDUT_MODIFY_BSS_PFC: |
| 342 | case BSSGP_PDUT_MODIFY_BSS_PFC_ACK: |
| 343 | case BSSGP_PDUT_DELETE_BSS_PFC: |
| 344 | case BSSGP_PDUT_DELETE_BSS_PFC_ACK: |
| 345 | LOGP(DBSSGP, LOGL_NOTICE, "Rx BSSGP BVCI=%d (SIGN) PDU type %s unexpected at SIGN\n", |
| 346 | bvci, bssgp_pdu_str(pdu_type)); |
Holger Hans Peter Freyther | a9744de | 2013-07-28 19:01:20 +0200 | [diff] [blame] | 347 | break; |
| 348 | default: |
Harald Welte | 05d7b5d | 2017-07-29 10:16:44 +0200 | [diff] [blame] | 349 | LOGP(DBSSGP, LOGL_NOTICE, "Rx BSSGP BVCI=%d (SIGN) PDU type %s unknown\n", |
Max | a49475b | 2017-05-23 17:53:38 +0200 | [diff] [blame] | 350 | bvci, bssgp_pdu_str(pdu_type)); |
Holger Hans Peter Freyther | a9744de | 2013-07-28 19:01:20 +0200 | [diff] [blame] | 351 | rc = bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, msg); |
| 352 | break; |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 353 | } |
| 354 | return rc; |
| 355 | } |
| 356 | |
Holger Hans Peter Freyther | 90d5df4 | 2013-07-28 21:14:15 +0200 | [diff] [blame] | 357 | static int gprs_bssgp_pcu_rcvmsg(struct msgb *msg) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 358 | { |
| 359 | struct bssgp_normal_hdr *bgph = (struct bssgp_normal_hdr *) msgb_bssgph(msg); |
| 360 | struct bssgp_ud_hdr *budh = (struct bssgp_ud_hdr *) msgb_bssgph(msg); |
| 361 | struct tlv_parsed tp; |
Max | a49475b | 2017-05-23 17:53:38 +0200 | [diff] [blame] | 362 | enum bssgp_pdu_type pdu_type = (enum bssgp_pdu_type) bgph->pdu_type; |
Max | 2813f93 | 2017-06-27 17:18:40 +0200 | [diff] [blame] | 363 | enum gprs_bssgp_cause cause = BSSGP_CAUSE_OML_INTERV; |
| 364 | uint16_t ns_bvci = msgb_bvci(msg), nsei = msgb_nsei(msg); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 365 | int data_len; |
| 366 | int rc = 0; |
Andreas Eversberg | 3e372d5 | 2012-07-06 09:28:15 +0200 | [diff] [blame] | 367 | struct bssgp_bvc_ctx *bctx; |
| 368 | |
Jacob Erlbeck | 39645b8 | 2015-03-16 12:27:11 +0100 | [diff] [blame] | 369 | if (pdu_type == BSSGP_PDUT_STATUS) |
| 370 | /* Pass the message to the generic BSSGP parser, which handles |
Max | 2813f93 | 2017-06-27 17:18:40 +0200 | [diff] [blame] | 371 | * STATUS and RESET messages in either direction. */ |
Jacob Erlbeck | 39645b8 | 2015-03-16 12:27:11 +0100 | [diff] [blame] | 372 | return bssgp_rcvmsg(msg); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 373 | |
| 374 | /* Identifiers from DOWN: NSEI, BVCI (both in msg->cb) */ |
| 375 | |
| 376 | /* UNITDATA BSSGP headers have TLLI in front */ |
| 377 | if (pdu_type != BSSGP_PDUT_UL_UNITDATA && pdu_type != BSSGP_PDUT_DL_UNITDATA) |
| 378 | { |
| 379 | data_len = msgb_bssgp_len(msg) - sizeof(*bgph); |
| 380 | rc = bssgp_tlv_parse(&tp, bgph->data, data_len); |
| 381 | } |
| 382 | else |
| 383 | { |
| 384 | data_len = msgb_bssgp_len(msg) - sizeof(*budh); |
| 385 | rc = bssgp_tlv_parse(&tp, budh->data, data_len); |
| 386 | } |
Stefan Sperling | 3df1532 | 2018-06-25 12:17:39 +0200 | [diff] [blame] | 387 | if (rc < 0) { |
| 388 | LOGP(DBSSGP, LOGL_ERROR, "Failed to parse BSSGP %s message. Invalid message was: %s\n", |
| 389 | bssgp_pdu_str(pdu_type), msgb_hexdump(msg)); |
Harald Welte | 7b7f204 | 2019-07-21 09:26:20 +0200 | [diff] [blame] | 390 | return bssgp_tx_status(BSSGP_CAUSE_INV_MAND_INF, NULL, msg); |
Stefan Sperling | 3df1532 | 2018-06-25 12:17:39 +0200 | [diff] [blame] | 391 | } |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 392 | |
Max | 2813f93 | 2017-06-27 17:18:40 +0200 | [diff] [blame] | 393 | if (pdu_type == BSSGP_PDUT_BVC_RESET) { |
| 394 | rc = bssgp_rcvmsg(msg); |
| 395 | if (ns_bvci != BVCI_SIGNALLING) |
| 396 | return rc; |
| 397 | |
| 398 | if (TLVP_PRES_LEN(&tp, BSSGP_IE_CAUSE, 1)) |
| 399 | cause = (enum gprs_bssgp_cause)*TLVP_VAL(&tp, BSSGP_IE_CAUSE); |
| 400 | else |
| 401 | LOGP(DBSSGP, LOGL_ERROR, "NSEI=%u BVC RESET without cause?!\n", nsei); |
| 402 | |
| 403 | rc = bssgp_tx_bvc_ptp_reset(nsei, cause); |
| 404 | if (rc < 0) |
| 405 | LOGP(DBSSGP, LOGL_ERROR, "NSEI=%u BVC PTP reset procedure failed: %d\n", nsei, rc); |
| 406 | |
| 407 | return rc; |
| 408 | } |
| 409 | |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 410 | /* look-up or create the BTS context for this BVC */ |
| 411 | bctx = btsctx_by_bvci_nsei(ns_bvci, msgb_nsei(msg)); |
| 412 | |
Andreas Eversberg | cd8a83a | 2012-09-23 06:41:21 +0200 | [diff] [blame] | 413 | if (!bctx |
| 414 | && pdu_type != BSSGP_PDUT_BVC_RESET_ACK |
Andreas Eversberg | 8c3680d | 2012-10-08 12:30:56 +0200 | [diff] [blame] | 415 | && pdu_type != BSSGP_PDUT_BVC_UNBLOCK_ACK |
| 416 | && pdu_type != BSSGP_PDUT_PAGING_PS) |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 417 | { |
Max | 2813f93 | 2017-06-27 17:18:40 +0200 | [diff] [blame] | 418 | LOGP(DBSSGP, LOGL_NOTICE, "NSEI=%u/BVCI=%u Rejecting PDU type %s for unknown BVCI\n", |
| 419 | nsei, ns_bvci, bssgp_pdu_str(pdu_type)); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 420 | return bssgp_tx_status(BSSGP_CAUSE_UNKNOWN_BVCI, NULL, msg); |
| 421 | } |
| 422 | |
| 423 | if (bctx) |
| 424 | { |
Neels Hofmeyr | a01e2ee | 2017-02-23 18:10:13 +0100 | [diff] [blame] | 425 | log_set_context(LOG_CTX_GB_BVC, bctx); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 426 | rate_ctr_inc(&bctx->ctrg->ctr[BSSGP_CTR_PKTS_IN]); |
| 427 | rate_ctr_add(&bctx->ctrg->ctr[BSSGP_CTR_BYTES_IN], msgb_bssgp_len(msg)); |
| 428 | } |
| 429 | |
| 430 | if (ns_bvci == BVCI_SIGNALLING) |
| 431 | { |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 432 | LOGP(DBSSGP, LOGL_DEBUG, "rx BVCI_SIGNALLING gprs_bssgp_rx_sign\n"); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 433 | rc = gprs_bssgp_pcu_rx_sign(msg, &tp, bctx); |
| 434 | } |
| 435 | else if (ns_bvci == BVCI_PTM) |
| 436 | { |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 437 | LOGP(DBSSGP, LOGL_DEBUG, "rx BVCI_PTM bssgp_tx_status\n"); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 438 | rc = bssgp_tx_status(BSSGP_CAUSE_PDU_INCOMP_FEAT, NULL, msg); |
| 439 | } |
| 440 | else |
| 441 | { |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 442 | LOGP(DBSSGP, LOGL_DEBUG, "rx BVCI_PTP gprs_bssgp_rx_ptp\n"); |
Ivan Kluchnikov | 8ee6051 | 2012-03-05 19:24:57 +0400 | [diff] [blame] | 443 | rc = gprs_bssgp_pcu_rx_ptp(msg, &tp, bctx); |
| 444 | } |
| 445 | return rc; |
| 446 | } |
Harald Welte | 477e79e | 2012-06-18 12:21:03 +0800 | [diff] [blame] | 447 | |
Jacob Erlbeck | 39645b8 | 2015-03-16 12:27:11 +0100 | [diff] [blame] | 448 | static void handle_nm_status(struct osmo_bssgp_prim *bp) |
| 449 | { |
| 450 | enum gprs_bssgp_cause cause; |
| 451 | |
| 452 | LOGP(DPCU, LOGL_DEBUG, |
| 453 | "Got NM-STATUS.ind, BVCI=%d, NSEI=%d\n", |
| 454 | bp->bvci, bp->nsei); |
| 455 | |
| 456 | if (!TLVP_PRESENT(bp->tp, BSSGP_IE_CAUSE)) |
| 457 | return; |
| 458 | |
| 459 | cause = (enum gprs_bssgp_cause)*TLVP_VAL(bp->tp, BSSGP_IE_CAUSE); |
| 460 | |
| 461 | if (cause != BSSGP_CAUSE_BVCI_BLOCKED && |
| 462 | cause != BSSGP_CAUSE_UNKNOWN_BVCI) |
| 463 | return; |
| 464 | |
| 465 | if (!TLVP_PRESENT(bp->tp, BSSGP_IE_BVCI)) |
| 466 | return; |
| 467 | |
| 468 | if (gprs_bssgp_pcu_current_bctx()->bvci != bp->bvci) { |
| 469 | LOGP(DPCU, LOGL_NOTICE, |
| 470 | "Received BSSGP STATUS message for an unknown BVCI (%d), " |
| 471 | "ignored\n", |
| 472 | bp->bvci); |
| 473 | return; |
| 474 | } |
| 475 | |
| 476 | switch (cause) { |
| 477 | case BSSGP_CAUSE_BVCI_BLOCKED: |
| 478 | if (the_pcu.bvc_unblocked) { |
| 479 | the_pcu.bvc_unblocked = 0; |
| 480 | bvc_timeout(NULL); |
| 481 | } |
| 482 | break; |
| 483 | |
| 484 | case BSSGP_CAUSE_UNKNOWN_BVCI: |
| 485 | if (the_pcu.bvc_reset) { |
| 486 | the_pcu.bvc_reset = 0; |
| 487 | bvc_timeout(NULL); |
| 488 | } |
| 489 | break; |
| 490 | default: |
| 491 | break; |
| 492 | } |
| 493 | } |
| 494 | |
Harald Welte | 477e79e | 2012-06-18 12:21:03 +0800 | [diff] [blame] | 495 | int bssgp_prim_cb(struct osmo_prim_hdr *oph, void *ctx) |
| 496 | { |
Jacob Erlbeck | 39645b8 | 2015-03-16 12:27:11 +0100 | [diff] [blame] | 497 | struct osmo_bssgp_prim *bp; |
| 498 | bp = container_of(oph, struct osmo_bssgp_prim, oph); |
| 499 | |
| 500 | switch (oph->sap) { |
| 501 | case SAP_BSSGP_NM: |
| 502 | if (oph->primitive == PRIM_NM_STATUS) |
| 503 | handle_nm_status(bp); |
| 504 | break; |
| 505 | default: |
| 506 | break; |
| 507 | } |
Harald Welte | 477e79e | 2012-06-18 12:21:03 +0800 | [diff] [blame] | 508 | return 0; |
| 509 | } |
Andreas Eversberg | bf5a0f6 | 2012-07-06 08:58:22 +0200 | [diff] [blame] | 510 | |
Alexander Couzens | eb64d43 | 2019-05-25 03:10:51 +0200 | [diff] [blame] | 511 | int gprs_bssgp_ns_cb(enum gprs_ns_evt event, struct gprs_nsvc *nsvc, struct msgb *msg, uint16_t bvci) |
Andreas Eversberg | bf5a0f6 | 2012-07-06 08:58:22 +0200 | [diff] [blame] | 512 | { |
| 513 | int rc = 0; |
| 514 | switch (event) { |
| 515 | case GPRS_NS_EVT_UNIT_DATA: |
| 516 | /* hand the message into the BSSGP implementation */ |
| 517 | rc = gprs_bssgp_pcu_rcvmsg(msg); |
| 518 | break; |
| 519 | default: |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 520 | LOGP(DPCU, LOGL_NOTICE, "RLCMAC: Unknown event %u from NS\n", event); |
Andreas Eversberg | bf5a0f6 | 2012-07-06 08:58:22 +0200 | [diff] [blame] | 521 | rc = -EIO; |
| 522 | break; |
| 523 | } |
| 524 | return rc; |
| 525 | } |
| 526 | |
Andreas Eversberg | bf5a0f6 | 2012-07-06 08:58:22 +0200 | [diff] [blame] | 527 | |
| 528 | static int nsvc_signal_cb(unsigned int subsys, unsigned int signal, |
| 529 | void *handler_data, void *signal_data) |
| 530 | { |
| 531 | struct ns_signal_data *nssd; |
| 532 | |
| 533 | if (subsys != SS_L_NS) |
| 534 | return -EINVAL; |
| 535 | |
| 536 | nssd = (struct ns_signal_data *)signal_data; |
Harald Welte | 57d3515 | 2018-07-05 03:11:17 +0200 | [diff] [blame] | 537 | if (signal != S_SNS_CONFIGURED && nssd->nsvc != the_pcu.nsvc) { |
Andreas Eversberg | bf5a0f6 | 2012-07-06 08:58:22 +0200 | [diff] [blame] | 538 | LOGP(DPCU, LOGL_ERROR, "Signal received of unknown NSVC\n"); |
| 539 | return -EINVAL; |
| 540 | } |
| 541 | |
| 542 | switch (signal) { |
Harald Welte | 57d3515 | 2018-07-05 03:11:17 +0200 | [diff] [blame] | 543 | case S_SNS_CONFIGURED: |
| 544 | the_pcu.bvc_sig_reset = 0; |
| 545 | the_pcu.bvc_reset = 0; |
| 546 | /* There's no NS-RESET / NS-UNBLOCK procedure on IP SNS based NS-VCs */ |
| 547 | the_pcu.nsvc_unblocked = 1; |
| 548 | LOGP(DPCU, LOGL_NOTICE, "NS-VC %d is unblocked.\n", the_pcu.nsvc->nsvci); |
| 549 | bvc_timeout(NULL); |
| 550 | break; |
Andreas Eversberg | bf5a0f6 | 2012-07-06 08:58:22 +0200 | [diff] [blame] | 551 | case S_NS_UNBLOCK: |
Holger Hans Peter Freyther | 4b984b1 | 2013-07-13 12:57:06 +0200 | [diff] [blame] | 552 | if (!the_pcu.nsvc_unblocked) { |
| 553 | the_pcu.nsvc_unblocked = 1; |
Andreas Eversberg | cd8a83a | 2012-09-23 06:41:21 +0200 | [diff] [blame] | 554 | LOGP(DPCU, LOGL_NOTICE, "NS-VC %d is unblocked.\n", |
Holger Hans Peter Freyther | 90f08ef | 2013-07-13 12:45:44 +0200 | [diff] [blame] | 555 | the_pcu.nsvc->nsvci); |
| 556 | the_pcu.bvc_sig_reset = 0; |
| 557 | the_pcu.bvc_reset = 0; |
| 558 | the_pcu.bvc_unblocked = 0; |
Andreas Eversberg | cd8a83a | 2012-09-23 06:41:21 +0200 | [diff] [blame] | 559 | bvc_timeout(NULL); |
Andreas Eversberg | bf5a0f6 | 2012-07-06 08:58:22 +0200 | [diff] [blame] | 560 | } |
| 561 | break; |
| 562 | case S_NS_BLOCK: |
Holger Hans Peter Freyther | 4b984b1 | 2013-07-13 12:57:06 +0200 | [diff] [blame] | 563 | if (the_pcu.nsvc_unblocked) { |
| 564 | the_pcu.nsvc_unblocked = 0; |
Holger Hans Peter Freyther | ed70cb7 | 2013-07-13 12:53:46 +0200 | [diff] [blame] | 565 | osmo_timer_del(&the_pcu.bvc_timer); |
Holger Hans Peter Freyther | 90f08ef | 2013-07-13 12:45:44 +0200 | [diff] [blame] | 566 | the_pcu.bvc_sig_reset = 0; |
| 567 | the_pcu.bvc_reset = 0; |
| 568 | the_pcu.bvc_unblocked = 0; |
Andreas Eversberg | bf5a0f6 | 2012-07-06 08:58:22 +0200 | [diff] [blame] | 569 | LOGP(DPCU, LOGL_NOTICE, "NS-VC is blocked.\n"); |
| 570 | } |
| 571 | break; |
Jacob Erlbeck | ebebad1 | 2015-08-17 14:43:52 +0200 | [diff] [blame] | 572 | case S_NS_ALIVE_EXP: |
| 573 | LOGP(DPCU, LOGL_NOTICE, "Tns alive expired too often, " |
| 574 | "re-starting RESET procedure\n"); |
| 575 | gprs_ns_reconnect(nssd->nsvc); |
| 576 | break; |
Andreas Eversberg | bf5a0f6 | 2012-07-06 08:58:22 +0200 | [diff] [blame] | 577 | } |
| 578 | |
| 579 | return 0; |
| 580 | } |
| 581 | |
Jacob Erlbeck | 3d62fc5 | 2015-04-30 15:01:15 +0200 | [diff] [blame] | 582 | static unsigned count_pdch(const struct gprs_rlcmac_bts *bts) |
| 583 | { |
| 584 | size_t trx_no, ts_no; |
| 585 | unsigned num_pdch = 0; |
| 586 | |
| 587 | for (trx_no = 0; trx_no < ARRAY_SIZE(bts->trx); ++trx_no) { |
| 588 | const struct gprs_rlcmac_trx *trx = &bts->trx[trx_no]; |
| 589 | |
| 590 | for (ts_no = 0; ts_no < ARRAY_SIZE(trx->pdch); ++ts_no) { |
| 591 | const struct gprs_rlcmac_pdch *pdch = &trx->pdch[ts_no]; |
| 592 | |
| 593 | if (pdch->is_enabled()) |
| 594 | num_pdch += 1; |
| 595 | } |
| 596 | } |
| 597 | |
| 598 | return num_pdch; |
| 599 | } |
| 600 | |
Jacob Erlbeck | 7f28c97 | 2016-02-04 17:54:42 +0100 | [diff] [blame] | 601 | static uint32_t gprs_bssgp_max_leak_rate(GprsCodingScheme cs, int num_pdch) |
Jacob Erlbeck | 3d62fc5 | 2015-04-30 15:01:15 +0200 | [diff] [blame] | 602 | { |
Max | 51754b6 | 2019-03-13 17:14:13 +0100 | [diff] [blame] | 603 | int bytes_per_rlc_block = cs.maxDataBlockBytes() * num_data_blocks(cs.headerTypeData()); |
Jacob Erlbeck | 3d62fc5 | 2015-04-30 15:01:15 +0200 | [diff] [blame] | 604 | |
Jacob Erlbeck | 7f28c97 | 2016-02-04 17:54:42 +0100 | [diff] [blame] | 605 | /* n byte payload per 20ms */ |
| 606 | return bytes_per_rlc_block * (1000 / 20) * num_pdch; |
Jacob Erlbeck | 3d62fc5 | 2015-04-30 15:01:15 +0200 | [diff] [blame] | 607 | } |
| 608 | |
| 609 | static uint32_t compute_bucket_size(struct gprs_rlcmac_bts *bts, |
| 610 | uint32_t leak_rate, uint32_t fallback) |
| 611 | { |
| 612 | uint32_t bucket_size = 0; |
Jacob Erlbeck | 0288cdb | 2015-05-06 10:47:30 +0200 | [diff] [blame] | 613 | uint16_t bucket_time = bts->fc_bucket_time; |
Jacob Erlbeck | 3d62fc5 | 2015-04-30 15:01:15 +0200 | [diff] [blame] | 614 | |
Jacob Erlbeck | 0288cdb | 2015-05-06 10:47:30 +0200 | [diff] [blame] | 615 | if (bucket_time == 0) |
| 616 | bucket_time = bts->force_llc_lifetime; |
| 617 | |
| 618 | if (bucket_time == 0xffff) |
Jacob Erlbeck | 3d62fc5 | 2015-04-30 15:01:15 +0200 | [diff] [blame] | 619 | bucket_size = FC_MAX_BUCKET_SIZE; |
| 620 | |
Jacob Erlbeck | 0288cdb | 2015-05-06 10:47:30 +0200 | [diff] [blame] | 621 | if (bucket_size == 0 && bucket_time && leak_rate) |
| 622 | bucket_size = (uint64_t)leak_rate * bucket_time / 100; |
Jacob Erlbeck | 3d62fc5 | 2015-04-30 15:01:15 +0200 | [diff] [blame] | 623 | |
| 624 | if (bucket_size == 0 && leak_rate) |
| 625 | bucket_size = leak_rate * FC_DEFAULT_LIFE_TIME_SECS; |
| 626 | |
| 627 | if (bucket_size == 0) |
| 628 | bucket_size = fallback; |
| 629 | |
| 630 | if (bucket_size > FC_MAX_BUCKET_SIZE) |
| 631 | bucket_size = FC_MAX_BUCKET_SIZE; |
| 632 | |
| 633 | return bucket_size; |
| 634 | } |
| 635 | |
Jacob Erlbeck | 6e4ccec | 2015-05-06 14:24:36 +0200 | [diff] [blame] | 636 | static uint32_t get_and_reset_avg_queue_delay(void) |
| 637 | { |
| 638 | struct timeval *delay_sum = &the_pcu.queue_delay_sum; |
Jacob Erlbeck | 0ae4313 | 2015-06-11 12:03:18 +0200 | [diff] [blame] | 639 | uint32_t delay_sum_ms = delay_sum->tv_sec * 1000 + |
Jacob Erlbeck | 6e4ccec | 2015-05-06 14:24:36 +0200 | [diff] [blame] | 640 | delay_sum->tv_usec / 1000000; |
| 641 | uint32_t avg_delay_ms = 0; |
| 642 | |
| 643 | if (the_pcu.queue_delay_count > 0) |
| 644 | avg_delay_ms = delay_sum_ms / the_pcu.queue_delay_count; |
| 645 | |
| 646 | /* Reset accumulator */ |
| 647 | delay_sum->tv_sec = delay_sum->tv_usec = 0; |
| 648 | the_pcu.queue_delay_count = 0; |
| 649 | |
| 650 | return avg_delay_ms; |
| 651 | } |
| 652 | |
Jacob Erlbeck | 2db0f08 | 2015-09-07 18:49:00 +0200 | [diff] [blame] | 653 | static int get_and_reset_measured_leak_rate(int *usage_by_1000, unsigned num_pdch) |
| 654 | { |
| 655 | int rate; /* byte per second */ |
| 656 | |
| 657 | if (the_pcu.queue_frames_sent == 0) |
| 658 | return -1; |
| 659 | |
| 660 | if (the_pcu.queue_frames_recv == 0) |
| 661 | return -1; |
| 662 | |
| 663 | *usage_by_1000 = the_pcu.queue_frames_recv * 1000 / |
| 664 | the_pcu.queue_frames_sent; |
| 665 | |
| 666 | /* 20ms/num_pdch is the average RLC block duration, so the rate is |
| 667 | * calculated as: |
| 668 | * rate = bytes_recv / (block_dur * block_count) */ |
| 669 | rate = the_pcu.queue_bytes_recv * 1000 * num_pdch / |
| 670 | (20 * the_pcu.queue_frames_recv); |
| 671 | |
| 672 | the_pcu.queue_frames_sent = 0; |
| 673 | the_pcu.queue_bytes_recv = 0; |
| 674 | the_pcu.queue_frames_recv = 0; |
| 675 | |
| 676 | return rate; |
| 677 | } |
| 678 | |
Jacob Erlbeck | 7f28c97 | 2016-02-04 17:54:42 +0100 | [diff] [blame] | 679 | static GprsCodingScheme max_coding_scheme_dl(struct gprs_rlcmac_bts *bts) |
| 680 | { |
| 681 | int num; |
| 682 | |
| 683 | if (bts->egprs_enabled) { |
| 684 | if (!bts->cs_adj_enabled) { |
| 685 | if (bts->initial_mcs_dl) |
| 686 | num = bts->initial_mcs_dl; |
| 687 | else |
| 688 | num = 1; |
| 689 | } else if (bts->max_mcs_dl) { |
| 690 | num = bts->max_mcs_dl; |
| 691 | } else { |
| 692 | num = 9; |
| 693 | } |
| 694 | |
| 695 | return GprsCodingScheme::getEgprsByNum(num); |
| 696 | } |
| 697 | |
| 698 | if (!bts->cs_adj_enabled) { |
| 699 | if (bts->initial_cs_dl) |
| 700 | num = bts->initial_cs_dl; |
| 701 | else if (bts->cs4) |
| 702 | num = 4; |
| 703 | else if (bts->cs3) |
| 704 | num = 3; |
| 705 | else if (bts->cs2) |
| 706 | num = 2; |
| 707 | else |
| 708 | num = 1; |
| 709 | } else if (bts->max_cs_dl) { |
| 710 | num = bts->max_cs_dl; |
| 711 | } else { |
| 712 | num = 4; |
| 713 | } |
| 714 | |
| 715 | return GprsCodingScheme::getGprsByNum(num); |
| 716 | } |
| 717 | |
Andreas Eversberg | cd8a83a | 2012-09-23 06:41:21 +0200 | [diff] [blame] | 718 | int gprs_bssgp_tx_fc_bvc(void) |
| 719 | { |
Jacob Erlbeck | 87d7341 | 2015-04-21 12:56:48 +0200 | [diff] [blame] | 720 | struct gprs_rlcmac_bts *bts; |
Jacob Erlbeck | 3d62fc5 | 2015-04-30 15:01:15 +0200 | [diff] [blame] | 721 | uint32_t bucket_size; /* oct */ |
| 722 | uint32_t ms_bucket_size; /* oct */ |
| 723 | uint32_t leak_rate; /* oct/s */ |
| 724 | uint32_t ms_leak_rate; /* oct/s */ |
Jacob Erlbeck | 6e4ccec | 2015-05-06 14:24:36 +0200 | [diff] [blame] | 725 | uint32_t avg_delay_ms; |
Jacob Erlbeck | 3d62fc5 | 2015-04-30 15:01:15 +0200 | [diff] [blame] | 726 | int num_pdch = -1; |
Jacob Erlbeck | 7f28c97 | 2016-02-04 17:54:42 +0100 | [diff] [blame] | 727 | GprsCodingScheme max_cs_dl; |
Jacob Erlbeck | 87d7341 | 2015-04-21 12:56:48 +0200 | [diff] [blame] | 728 | |
Holger Hans Peter Freyther | 90692f9 | 2013-07-13 12:51:16 +0200 | [diff] [blame] | 729 | if (!the_pcu.bctx) { |
Andreas Eversberg | cd8a83a | 2012-09-23 06:41:21 +0200 | [diff] [blame] | 730 | LOGP(DBSSGP, LOGL_ERROR, "No bctx\n"); |
| 731 | return -EIO; |
| 732 | } |
Jacob Erlbeck | 87d7341 | 2015-04-21 12:56:48 +0200 | [diff] [blame] | 733 | bts = bts_main_data(); |
| 734 | |
Jacob Erlbeck | 7f28c97 | 2016-02-04 17:54:42 +0100 | [diff] [blame] | 735 | max_cs_dl = max_coding_scheme_dl(bts); |
Jacob Erlbeck | 6eed191 | 2015-07-21 18:29:46 +0200 | [diff] [blame] | 736 | |
Jacob Erlbeck | 3d62fc5 | 2015-04-30 15:01:15 +0200 | [diff] [blame] | 737 | bucket_size = bts->fc_bvc_bucket_size; |
| 738 | leak_rate = bts->fc_bvc_leak_rate; |
| 739 | ms_bucket_size = bts->fc_ms_bucket_size; |
| 740 | ms_leak_rate = bts->fc_ms_leak_rate; |
| 741 | |
| 742 | if (leak_rate == 0) { |
Jacob Erlbeck | 2db0f08 | 2015-09-07 18:49:00 +0200 | [diff] [blame] | 743 | int meas_rate; |
| 744 | int usage; /* in 0..1000 */ |
| 745 | |
| 746 | if (num_pdch < 0) |
| 747 | num_pdch = count_pdch(bts); |
| 748 | |
| 749 | meas_rate = get_and_reset_measured_leak_rate(&usage, num_pdch); |
| 750 | if (meas_rate > 0) { |
| 751 | leak_rate = gprs_bssgp_max_leak_rate(max_cs_dl, num_pdch); |
| 752 | leak_rate = |
| 753 | (meas_rate * usage + leak_rate * (1000 - usage)) / |
| 754 | 1000; |
| 755 | LOGP(DBSSGP, LOGL_DEBUG, |
| 756 | "Estimated BVC leak rate = %d " |
| 757 | "(measured %d, usage %d%%)\n", |
| 758 | leak_rate, meas_rate, usage/10); |
| 759 | } |
| 760 | } |
| 761 | |
| 762 | if (leak_rate == 0) { |
Jacob Erlbeck | 3d62fc5 | 2015-04-30 15:01:15 +0200 | [diff] [blame] | 763 | if (num_pdch < 0) |
| 764 | num_pdch = count_pdch(bts); |
| 765 | |
Jacob Erlbeck | 6eed191 | 2015-07-21 18:29:46 +0200 | [diff] [blame] | 766 | leak_rate = gprs_bssgp_max_leak_rate(max_cs_dl, num_pdch); |
Jacob Erlbeck | 3d62fc5 | 2015-04-30 15:01:15 +0200 | [diff] [blame] | 767 | |
| 768 | LOGP(DBSSGP, LOGL_DEBUG, |
Jacob Erlbeck | 7f28c97 | 2016-02-04 17:54:42 +0100 | [diff] [blame] | 769 | "Computed BVC leak rate = %d, num_pdch = %d, cs = %s\n", |
Max | 136ebcc | 2019-03-05 14:59:03 +0100 | [diff] [blame] | 770 | leak_rate, num_pdch, mcs_name(max_cs_dl)); |
Jacob Erlbeck | 3d62fc5 | 2015-04-30 15:01:15 +0200 | [diff] [blame] | 771 | }; |
| 772 | |
| 773 | if (ms_leak_rate == 0) { |
| 774 | int ms_num_pdch; |
Jacob Erlbeck | 7f79f0d | 2015-07-17 11:38:49 +0200 | [diff] [blame] | 775 | int max_pdch = gprs_alloc_max_dl_slots_per_ms(bts); |
Jacob Erlbeck | 3d62fc5 | 2015-04-30 15:01:15 +0200 | [diff] [blame] | 776 | |
| 777 | if (num_pdch < 0) |
| 778 | num_pdch = count_pdch(bts); |
| 779 | |
| 780 | ms_num_pdch = num_pdch; |
Jacob Erlbeck | 7f79f0d | 2015-07-17 11:38:49 +0200 | [diff] [blame] | 781 | if (max_pdch > FC_MS_MAX_RX_SLOTS) |
| 782 | max_pdch = FC_MS_MAX_RX_SLOTS; |
| 783 | if (ms_num_pdch > max_pdch) |
| 784 | ms_num_pdch = max_pdch; |
Jacob Erlbeck | 3d62fc5 | 2015-04-30 15:01:15 +0200 | [diff] [blame] | 785 | |
Jacob Erlbeck | 6eed191 | 2015-07-21 18:29:46 +0200 | [diff] [blame] | 786 | ms_leak_rate = gprs_bssgp_max_leak_rate(max_cs_dl, ms_num_pdch); |
Jacob Erlbeck | 3d62fc5 | 2015-04-30 15:01:15 +0200 | [diff] [blame] | 787 | |
| 788 | /* TODO: To properly support multiple TRX, the per MS leak rate |
| 789 | * should be derived from the max number of PDCH TS per TRX. |
| 790 | */ |
| 791 | LOGP(DBSSGP, LOGL_DEBUG, |
Jacob Erlbeck | 7f28c97 | 2016-02-04 17:54:42 +0100 | [diff] [blame] | 792 | "Computed MS default leak rate = %d, ms_num_pdch = %d, " |
| 793 | "cs = %s\n", |
Max | 136ebcc | 2019-03-05 14:59:03 +0100 | [diff] [blame] | 794 | ms_leak_rate, ms_num_pdch, mcs_name(max_cs_dl)); |
Jacob Erlbeck | 3d62fc5 | 2015-04-30 15:01:15 +0200 | [diff] [blame] | 795 | }; |
| 796 | |
| 797 | /* TODO: Force leak_rate to 0 on buffer bloat */ |
| 798 | |
| 799 | if (bucket_size == 0) |
| 800 | bucket_size = compute_bucket_size(bts, leak_rate, |
| 801 | FC_FALLBACK_BVC_BUCKET_SIZE); |
| 802 | |
| 803 | if (ms_bucket_size == 0) |
| 804 | ms_bucket_size = compute_bucket_size(bts, ms_leak_rate, |
| 805 | FC_MS_BUCKET_SIZE_BY_BMAX(bucket_size)); |
| 806 | |
| 807 | if (leak_rate > FC_MAX_BUCKET_LEAK_RATE) |
| 808 | leak_rate = FC_MAX_BUCKET_LEAK_RATE; |
| 809 | |
| 810 | if (ms_leak_rate > FC_MAX_BUCKET_LEAK_RATE) |
| 811 | ms_leak_rate = FC_MAX_BUCKET_LEAK_RATE; |
| 812 | |
Jacob Erlbeck | 6e4ccec | 2015-05-06 14:24:36 +0200 | [diff] [blame] | 813 | /* Avg queue delay monitoring */ |
| 814 | avg_delay_ms = get_and_reset_avg_queue_delay(); |
Jacob Erlbeck | 3d62fc5 | 2015-04-30 15:01:15 +0200 | [diff] [blame] | 815 | |
Jacob Erlbeck | 6eeb7c7 | 2015-05-06 15:26:08 +0200 | [diff] [blame] | 816 | /* Update tag */ |
| 817 | the_pcu.fc_tag += 1; |
| 818 | |
Jacob Erlbeck | 3d62fc5 | 2015-04-30 15:01:15 +0200 | [diff] [blame] | 819 | LOGP(DBSSGP, LOGL_DEBUG, |
Jacob Erlbeck | 6e4ccec | 2015-05-06 14:24:36 +0200 | [diff] [blame] | 820 | "Sending FLOW CONTROL BVC, Bmax = %d, R = %d, Bmax_MS = %d, " |
| 821 | "R_MS = %d, avg_dly = %d\n", |
| 822 | bucket_size, leak_rate, ms_bucket_size, ms_leak_rate, |
| 823 | avg_delay_ms); |
Jacob Erlbeck | 3d62fc5 | 2015-04-30 15:01:15 +0200 | [diff] [blame] | 824 | |
Jacob Erlbeck | 6eeb7c7 | 2015-05-06 15:26:08 +0200 | [diff] [blame] | 825 | return bssgp_tx_fc_bvc(the_pcu.bctx, the_pcu.fc_tag, |
Jacob Erlbeck | 3d62fc5 | 2015-04-30 15:01:15 +0200 | [diff] [blame] | 826 | bucket_size, leak_rate, |
| 827 | ms_bucket_size, ms_leak_rate, |
Jacob Erlbeck | 6e4ccec | 2015-05-06 14:24:36 +0200 | [diff] [blame] | 828 | NULL, &avg_delay_ms); |
Andreas Eversberg | cd8a83a | 2012-09-23 06:41:21 +0200 | [diff] [blame] | 829 | } |
| 830 | |
| 831 | static void bvc_timeout(void *_priv) |
| 832 | { |
Holger Hans Peter Freyther | 90f08ef | 2013-07-13 12:45:44 +0200 | [diff] [blame] | 833 | if (!the_pcu.bvc_sig_reset) { |
Andreas Eversberg | cd8a83a | 2012-09-23 06:41:21 +0200 | [diff] [blame] | 834 | LOGP(DBSSGP, LOGL_INFO, "Sending reset on BVCI 0\n"); |
Holger Hans Peter Freyther | 90692f9 | 2013-07-13 12:51:16 +0200 | [diff] [blame] | 835 | bssgp_tx_bvc_reset(the_pcu.bctx, 0, BSSGP_CAUSE_OML_INTERV); |
Jacob Erlbeck | 1e96af6 | 2015-03-17 08:11:25 +0100 | [diff] [blame] | 836 | osmo_timer_schedule(&the_pcu.bvc_timer, BSSGP_TIMER_T2, 0); |
Andreas Eversberg | cd8a83a | 2012-09-23 06:41:21 +0200 | [diff] [blame] | 837 | return; |
| 838 | } |
| 839 | |
Holger Hans Peter Freyther | 90f08ef | 2013-07-13 12:45:44 +0200 | [diff] [blame] | 840 | if (!the_pcu.bvc_reset) { |
Andreas Eversberg | cd8a83a | 2012-09-23 06:41:21 +0200 | [diff] [blame] | 841 | LOGP(DBSSGP, LOGL_INFO, "Sending reset on BVCI %d\n", |
Holger Hans Peter Freyther | 90692f9 | 2013-07-13 12:51:16 +0200 | [diff] [blame] | 842 | the_pcu.bctx->bvci); |
| 843 | bssgp_tx_bvc_reset(the_pcu.bctx, the_pcu.bctx->bvci, BSSGP_CAUSE_OML_INTERV); |
Jacob Erlbeck | 1e96af6 | 2015-03-17 08:11:25 +0100 | [diff] [blame] | 844 | osmo_timer_schedule(&the_pcu.bvc_timer, BSSGP_TIMER_T2, 0); |
Andreas Eversberg | cd8a83a | 2012-09-23 06:41:21 +0200 | [diff] [blame] | 845 | return; |
| 846 | } |
| 847 | |
Holger Hans Peter Freyther | 90f08ef | 2013-07-13 12:45:44 +0200 | [diff] [blame] | 848 | if (!the_pcu.bvc_unblocked) { |
Andreas Eversberg | cd8a83a | 2012-09-23 06:41:21 +0200 | [diff] [blame] | 849 | LOGP(DBSSGP, LOGL_INFO, "Sending unblock on BVCI %d\n", |
Holger Hans Peter Freyther | 90692f9 | 2013-07-13 12:51:16 +0200 | [diff] [blame] | 850 | the_pcu.bctx->bvci); |
| 851 | bssgp_tx_bvc_unblock(the_pcu.bctx); |
Jacob Erlbeck | 1e96af6 | 2015-03-17 08:11:25 +0100 | [diff] [blame] | 852 | osmo_timer_schedule(&the_pcu.bvc_timer, BSSGP_TIMER_T1, 0); |
Andreas Eversberg | cd8a83a | 2012-09-23 06:41:21 +0200 | [diff] [blame] | 853 | return; |
| 854 | } |
| 855 | |
| 856 | LOGP(DBSSGP, LOGL_DEBUG, "Sending flow control info on BVCI %d\n", |
Holger Hans Peter Freyther | 90692f9 | 2013-07-13 12:51:16 +0200 | [diff] [blame] | 857 | the_pcu.bctx->bvci); |
Andreas Eversberg | cd8a83a | 2012-09-23 06:41:21 +0200 | [diff] [blame] | 858 | gprs_bssgp_tx_fc_bvc(); |
Holger Hans Peter Freyther | b67a8a3 | 2013-07-28 18:55:14 +0200 | [diff] [blame] | 859 | osmo_timer_schedule(&the_pcu.bvc_timer, the_pcu.bts->fc_interval, 0); |
Andreas Eversberg | cd8a83a | 2012-09-23 06:41:21 +0200 | [diff] [blame] | 860 | } |
| 861 | |
Harald Welte | b26854c | 2019-02-21 17:17:07 +0100 | [diff] [blame] | 862 | static int gprs_ns_reconnect(struct gprs_nsvc *nsvc) |
Jacob Erlbeck | ebebad1 | 2015-08-17 14:43:52 +0200 | [diff] [blame] | 863 | { |
| 864 | struct gprs_nsvc *nsvc2; |
| 865 | |
Jacob Erlbeck | ebebad1 | 2015-08-17 14:43:52 +0200 | [diff] [blame] | 866 | if (nsvc != the_pcu.nsvc) { |
| 867 | LOGP(DBSSGP, LOGL_ERROR, "NSVC is invalid\n"); |
| 868 | return -EBADF; |
| 869 | } |
| 870 | |
Harald Welte | 57d3515 | 2018-07-05 03:11:17 +0200 | [diff] [blame] | 871 | if (the_pcu.bts->gb_dialect_sns) |
| 872 | nsvc2 = gprs_ns_nsip_connect_sns(bssgp_nsi, &nsvc->ip.bts_addr, nsvc->nsei, nsvc->nsvci); |
| 873 | else |
| 874 | nsvc2 = gprs_ns_nsip_connect(bssgp_nsi, &nsvc->ip.bts_addr, nsvc->nsei, nsvc->nsvci); |
Jacob Erlbeck | ebebad1 | 2015-08-17 14:43:52 +0200 | [diff] [blame] | 875 | if (!nsvc2) { |
| 876 | LOGP(DBSSGP, LOGL_ERROR, "Failed to reconnect NSVC\n"); |
| 877 | return -EIO; |
| 878 | } |
| 879 | |
| 880 | return 0; |
| 881 | } |
| 882 | |
Andreas Eversberg | bf5a0f6 | 2012-07-06 08:58:22 +0200 | [diff] [blame] | 883 | /* create BSSGP/NS layer instances */ |
Holger Hans Peter Freyther | e8d9a5f | 2013-07-28 19:11:20 +0200 | [diff] [blame] | 884 | struct gprs_bssgp_pcu *gprs_bssgp_create_and_connect(struct gprs_rlcmac_bts *bts, |
Holger Hans Peter Freyther | b67a8a3 | 2013-07-28 18:55:14 +0200 | [diff] [blame] | 885 | uint16_t local_port, uint32_t sgsn_ip, |
Harald Welte | 30a73d8 | 2013-03-10 08:54:30 +0000 | [diff] [blame] | 886 | uint16_t sgsn_port, uint16_t nsei, uint16_t nsvci, uint16_t bvci, |
Neels Hofmeyr | bdc55fa | 2018-02-21 00:39:07 +0100 | [diff] [blame] | 887 | uint16_t mcc, uint16_t mnc, bool mnc_3_digits, uint16_t lac, uint16_t rac, |
Harald Welte | 30a73d8 | 2013-03-10 08:54:30 +0000 | [diff] [blame] | 888 | uint16_t cell_id) |
Andreas Eversberg | bf5a0f6 | 2012-07-06 08:58:22 +0200 | [diff] [blame] | 889 | { |
| 890 | struct sockaddr_in dest; |
Andreas Eversberg | a3c12fb | 2012-09-28 22:46:33 +0200 | [diff] [blame] | 891 | int rc; |
Andreas Eversberg | bf5a0f6 | 2012-07-06 08:58:22 +0200 | [diff] [blame] | 892 | |
Holger Hans Peter Freyther | e8d9a5f | 2013-07-28 19:11:20 +0200 | [diff] [blame] | 893 | /* if already created... return the current address */ |
Holger Hans Peter Freyther | 90692f9 | 2013-07-13 12:51:16 +0200 | [diff] [blame] | 894 | if (the_pcu.bctx) |
Holger Hans Peter Freyther | e8d9a5f | 2013-07-28 19:11:20 +0200 | [diff] [blame] | 895 | return &the_pcu; |
Andreas Eversberg | bf5a0f6 | 2012-07-06 08:58:22 +0200 | [diff] [blame] | 896 | |
Holger Hans Peter Freyther | b67a8a3 | 2013-07-28 18:55:14 +0200 | [diff] [blame] | 897 | the_pcu.bts = bts; |
| 898 | |
Harald Welte | 57d3515 | 2018-07-05 03:11:17 +0200 | [diff] [blame] | 899 | /* don't specify remote IP/port if SNS dialect is in use; Doing so would |
| 900 | * issue a connect() on the socket, which prevents us to dynamically communicate |
| 901 | * with any number of IP-SNS endpoints on the SGSN side */ |
| 902 | if (!bts->gb_dialect_sns) { |
| 903 | bssgp_nsi->nsip.remote_port = sgsn_port; |
| 904 | bssgp_nsi->nsip.remote_ip = sgsn_ip; |
| 905 | } |
Harald Welte | 30a73d8 | 2013-03-10 08:54:30 +0000 | [diff] [blame] | 906 | bssgp_nsi->nsip.local_port = local_port; |
Andreas Eversberg | a3c12fb | 2012-09-28 22:46:33 +0200 | [diff] [blame] | 907 | rc = gprs_ns_nsip_listen(bssgp_nsi); |
| 908 | if (rc < 0) { |
| 909 | LOGP(DBSSGP, LOGL_ERROR, "Failed to create socket\n"); |
Alexander Couzens | 5c3783b | 2019-05-25 05:41:18 +0200 | [diff] [blame] | 910 | gprs_ns_close(bssgp_nsi); |
Holger Hans Peter Freyther | e8d9a5f | 2013-07-28 19:11:20 +0200 | [diff] [blame] | 911 | return NULL; |
Andreas Eversberg | a3c12fb | 2012-09-28 22:46:33 +0200 | [diff] [blame] | 912 | } |
Andreas Eversberg | bf5a0f6 | 2012-07-06 08:58:22 +0200 | [diff] [blame] | 913 | |
| 914 | dest.sin_family = AF_INET; |
| 915 | dest.sin_port = htons(sgsn_port); |
| 916 | dest.sin_addr.s_addr = htonl(sgsn_ip); |
| 917 | |
Harald Welte | 57d3515 | 2018-07-05 03:11:17 +0200 | [diff] [blame] | 918 | if (bts->gb_dialect_sns) |
| 919 | the_pcu.nsvc = gprs_ns_nsip_connect_sns(bssgp_nsi, &dest, nsei, nsvci); |
| 920 | else |
| 921 | the_pcu.nsvc = gprs_ns_nsip_connect(bssgp_nsi, &dest, nsei, nsvci); |
Holger Hans Peter Freyther | 90f08ef | 2013-07-13 12:45:44 +0200 | [diff] [blame] | 922 | if (!the_pcu.nsvc) { |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 923 | LOGP(DBSSGP, LOGL_ERROR, "Failed to create NSVCt\n"); |
Alexander Couzens | 5c3783b | 2019-05-25 05:41:18 +0200 | [diff] [blame] | 924 | gprs_ns_close(bssgp_nsi); |
Holger Hans Peter Freyther | e8d9a5f | 2013-07-28 19:11:20 +0200 | [diff] [blame] | 925 | return NULL; |
Andreas Eversberg | bf5a0f6 | 2012-07-06 08:58:22 +0200 | [diff] [blame] | 926 | } |
| 927 | |
Holger Hans Peter Freyther | 90692f9 | 2013-07-13 12:51:16 +0200 | [diff] [blame] | 928 | the_pcu.bctx = btsctx_alloc(bvci, nsei); |
| 929 | if (!the_pcu.bctx) { |
Andreas Eversberg | 0e40309 | 2012-07-06 11:04:57 +0200 | [diff] [blame] | 930 | LOGP(DBSSGP, LOGL_ERROR, "Failed to create BSSGP context\n"); |
Holger Hans Peter Freyther | 90f08ef | 2013-07-13 12:45:44 +0200 | [diff] [blame] | 931 | the_pcu.nsvc = NULL; |
Alexander Couzens | 5c3783b | 2019-05-25 05:41:18 +0200 | [diff] [blame] | 932 | gprs_ns_close(bssgp_nsi); |
Holger Hans Peter Freyther | e8d9a5f | 2013-07-28 19:11:20 +0200 | [diff] [blame] | 933 | return NULL; |
Andreas Eversberg | bf5a0f6 | 2012-07-06 08:58:22 +0200 | [diff] [blame] | 934 | } |
Holger Hans Peter Freyther | 90692f9 | 2013-07-13 12:51:16 +0200 | [diff] [blame] | 935 | the_pcu.bctx->ra_id.mcc = spoof_mcc ? : mcc; |
Neels Hofmeyr | bdc55fa | 2018-02-21 00:39:07 +0100 | [diff] [blame] | 936 | if (spoof_mnc) { |
| 937 | the_pcu.bctx->ra_id.mnc = spoof_mnc; |
| 938 | the_pcu.bctx->ra_id.mnc_3_digits = spoof_mnc_3_digits; |
| 939 | } else { |
| 940 | the_pcu.bctx->ra_id.mnc = mnc; |
| 941 | the_pcu.bctx->ra_id.mnc_3_digits = mnc_3_digits; |
| 942 | } |
Holger Hans Peter Freyther | 90692f9 | 2013-07-13 12:51:16 +0200 | [diff] [blame] | 943 | the_pcu.bctx->ra_id.lac = lac; |
| 944 | the_pcu.bctx->ra_id.rac = rac; |
| 945 | the_pcu.bctx->cell_id = cell_id; |
Andreas Eversberg | bf5a0f6 | 2012-07-06 08:58:22 +0200 | [diff] [blame] | 946 | |
| 947 | osmo_signal_register_handler(SS_L_NS, nsvc_signal_cb, NULL); |
| 948 | |
Pau Espin Pedrol | a8892a6 | 2019-09-05 16:21:04 +0200 | [diff] [blame] | 949 | osmo_timer_setup(&the_pcu.bvc_timer, bvc_timeout, NULL); |
Andreas Eversberg | cd8a83a | 2012-09-23 06:41:21 +0200 | [diff] [blame] | 950 | |
Holger Hans Peter Freyther | e8d9a5f | 2013-07-28 19:11:20 +0200 | [diff] [blame] | 951 | return &the_pcu; |
Andreas Eversberg | bf5a0f6 | 2012-07-06 08:58:22 +0200 | [diff] [blame] | 952 | } |
| 953 | |
Daniel Willmann | 6d8884d | 2014-06-04 18:30:59 +0200 | [diff] [blame] | 954 | void gprs_bssgp_destroy(void) |
Andreas Eversberg | bf5a0f6 | 2012-07-06 08:58:22 +0200 | [diff] [blame] | 955 | { |
Jacob Erlbeck | c362df2 | 2016-01-20 22:02:19 +0100 | [diff] [blame] | 956 | struct gprs_ns_inst *nsi = bssgp_nsi; |
| 957 | if (!nsi) |
Andreas Eversberg | bf5a0f6 | 2012-07-06 08:58:22 +0200 | [diff] [blame] | 958 | return; |
| 959 | |
Jacob Erlbeck | c362df2 | 2016-01-20 22:02:19 +0100 | [diff] [blame] | 960 | bssgp_nsi = NULL; |
| 961 | |
Holger Hans Peter Freyther | ed70cb7 | 2013-07-13 12:53:46 +0200 | [diff] [blame] | 962 | osmo_timer_del(&the_pcu.bvc_timer); |
Andreas Eversberg | cd8a83a | 2012-09-23 06:41:21 +0200 | [diff] [blame] | 963 | |
Andreas Eversberg | bf5a0f6 | 2012-07-06 08:58:22 +0200 | [diff] [blame] | 964 | osmo_signal_unregister_handler(SS_L_NS, nsvc_signal_cb, NULL); |
| 965 | |
Holger Hans Peter Freyther | 90f08ef | 2013-07-13 12:45:44 +0200 | [diff] [blame] | 966 | the_pcu.nsvc = NULL; |
Andreas Eversberg | bf5a0f6 | 2012-07-06 08:58:22 +0200 | [diff] [blame] | 967 | |
Andreas Eversberg | bf5a0f6 | 2012-07-06 08:58:22 +0200 | [diff] [blame] | 968 | /* FIXME: blocking... */ |
Holger Hans Peter Freyther | 40bd0c4 | 2013-07-13 12:58:20 +0200 | [diff] [blame] | 969 | the_pcu.nsvc_unblocked = 0; |
| 970 | the_pcu.bvc_sig_reset = 0; |
| 971 | the_pcu.bvc_reset = 0; |
| 972 | the_pcu.bvc_unblocked = 0; |
Andreas Eversberg | bf5a0f6 | 2012-07-06 08:58:22 +0200 | [diff] [blame] | 973 | |
Jacob Erlbeck | c362df2 | 2016-01-20 22:02:19 +0100 | [diff] [blame] | 974 | gprs_ns_destroy(nsi); |
| 975 | |
| 976 | /* FIXME: move this to libgb: btsctx_free() */ |
| 977 | llist_del(&the_pcu.bctx->list); |
| 978 | #warning "This causes ASAN to complain. It is not critical for normal operation but should be fixed nevertheless" |
| 979 | #if 0 |
| 980 | talloc_free(the_pcu.bctx); |
| 981 | #endif |
| 982 | the_pcu.bctx = NULL; |
Andreas Eversberg | bf5a0f6 | 2012-07-06 08:58:22 +0200 | [diff] [blame] | 983 | } |
| 984 | |
Holger Hans Peter Freyther | 90692f9 | 2013-07-13 12:51:16 +0200 | [diff] [blame] | 985 | struct bssgp_bvc_ctx *gprs_bssgp_pcu_current_bctx(void) |
| 986 | { |
| 987 | return the_pcu.bctx; |
| 988 | } |
Jacob Erlbeck | 6e4ccec | 2015-05-06 14:24:36 +0200 | [diff] [blame] | 989 | |
Jacob Erlbeck | 2db0f08 | 2015-09-07 18:49:00 +0200 | [diff] [blame] | 990 | void gprs_bssgp_update_frames_sent() |
| 991 | { |
| 992 | the_pcu.queue_frames_sent += 1; |
| 993 | } |
| 994 | |
| 995 | void gprs_bssgp_update_bytes_received(unsigned bytes_recv, unsigned frames_recv) |
| 996 | { |
| 997 | the_pcu.queue_bytes_recv += bytes_recv; |
| 998 | the_pcu.queue_frames_recv += frames_recv; |
| 999 | } |
| 1000 | |
Jacob Erlbeck | 1e50a3d | 2015-06-16 10:18:42 +0200 | [diff] [blame] | 1001 | void gprs_bssgp_update_queue_delay(const struct timeval *tv_recv, |
| 1002 | const struct timeval *tv_now) |
Jacob Erlbeck | 6e4ccec | 2015-05-06 14:24:36 +0200 | [diff] [blame] | 1003 | { |
| 1004 | struct timeval *delay_sum = &the_pcu.queue_delay_sum; |
| 1005 | struct timeval tv_delay; |
| 1006 | |
| 1007 | timersub(tv_now, tv_recv, &tv_delay); |
| 1008 | timeradd(delay_sum, &tv_delay, delay_sum); |
| 1009 | |
| 1010 | the_pcu.queue_delay_count += 1; |
| 1011 | } |