Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 1 | /* NS-over-IP proxy */ |
| 2 | |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 3 | /* (C) 2010-2020 by Harald Welte <laforge@gnumonks.org> |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 4 | * (C) 2010-2013 by On-Waves |
| 5 | * (C) 2013 by Holger Hans Peter Freyther |
| 6 | * All Rights Reserved |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU Affero General Public License as published by |
| 10 | * the Free Software Foundation; either version 3 of the License, or |
| 11 | * (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU Affero General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU Affero General Public License |
| 19 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 20 | * |
| 21 | */ |
| 22 | |
| 23 | #include <unistd.h> |
| 24 | #include <stdio.h> |
| 25 | #include <stdlib.h> |
| 26 | #include <string.h> |
| 27 | #include <getopt.h> |
| 28 | #include <errno.h> |
| 29 | #include <sys/fcntl.h> |
| 30 | #include <sys/stat.h> |
| 31 | #include <arpa/inet.h> |
| 32 | #include <time.h> |
| 33 | |
Harald Welte | d2fef95 | 2020-12-05 00:31:07 +0100 | [diff] [blame] | 34 | #include <osmocom/core/hashtable.h> |
Daniel Willmann | 8f407b1 | 2020-12-02 19:33:50 +0100 | [diff] [blame] | 35 | #include <osmocom/core/logging.h> |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 36 | #include <osmocom/core/talloc.h> |
| 37 | #include <osmocom/core/select.h> |
| 38 | #include <osmocom/core/rate_ctr.h> |
| 39 | #include <osmocom/core/stats.h> |
| 40 | |
Alexander Couzens | 951e133 | 2020-09-22 13:21:46 +0200 | [diff] [blame] | 41 | #include <osmocom/gprs/gprs_ns2.h> |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 42 | #include <osmocom/gprs/gprs_bssgp.h> |
Harald Welte | 209dc9f | 2020-12-12 19:02:16 +0100 | [diff] [blame] | 43 | #include <osmocom/gprs/gprs_bssgp2.h> |
Alexander Couzens | 951e133 | 2020-09-22 13:21:46 +0200 | [diff] [blame] | 44 | #include <osmocom/gprs/gprs_bssgp_bss.h> |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 45 | #include <osmocom/gprs/bssgp_bvc_fsm.h> |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 46 | |
| 47 | #include <osmocom/gsm/gsm_utils.h> |
| 48 | |
| 49 | #include <osmocom/sgsn/signal.h> |
| 50 | #include <osmocom/sgsn/debug.h> |
| 51 | #include <osmocom/sgsn/gprs_gb_parse.h> |
| 52 | #include <osmocom/sgsn/gb_proxy.h> |
| 53 | |
| 54 | #include <osmocom/sgsn/gprs_llc.h> |
| 55 | #include <osmocom/gsm/protocol/gsm_04_08_gprs.h> |
| 56 | #include <osmocom/sgsn/gprs_utils.h> |
| 57 | |
| 58 | extern void *tall_sgsn_ctx; |
| 59 | |
| 60 | static const struct rate_ctr_desc global_ctr_description[] = { |
| 61 | { "inv-bvci", "Invalid BVC Identifier " }, |
| 62 | { "inv-lai", "Invalid Location Area Identifier" }, |
| 63 | { "inv-rai", "Invalid Routing Area Identifier " }, |
| 64 | { "inv-nsei", "No BVC established for NSEI " }, |
| 65 | { "proto-err:bss", "BSSGP protocol error (BSS )" }, |
| 66 | { "proto-err:sgsn", "BSSGP protocol error (SGSN)" }, |
| 67 | { "not-supp:bss", "Feature not supported (BSS )" }, |
| 68 | { "not-supp:sgsn", "Feature not supported (SGSN)" }, |
| 69 | { "restart:sgsn", "Restarted RESET procedure (SGSN)" }, |
| 70 | { "tx-err:sgsn", "NS Transmission error (SGSN)" }, |
| 71 | { "error", "Other error " }, |
| 72 | { "mod-peer-err", "Patch error: no peer " }, |
| 73 | }; |
| 74 | |
| 75 | static const struct rate_ctr_group_desc global_ctrg_desc = { |
| 76 | .group_name_prefix = "gbproxy:global", |
| 77 | .group_description = "GBProxy Global Statistics", |
| 78 | .num_ctr = ARRAY_SIZE(global_ctr_description), |
| 79 | .ctr_desc = global_ctr_description, |
| 80 | .class_id = OSMO_STATS_CLASS_GLOBAL, |
| 81 | }; |
| 82 | |
Harald Welte | 560bdb3 | 2020-12-04 22:24:47 +0100 | [diff] [blame] | 83 | static int gbprox_relay2peer(struct msgb *old_msg, struct gbproxy_bvc *bvc, |
Daniel Willmann | 35f7d33 | 2020-11-03 21:11:45 +0100 | [diff] [blame] | 84 | uint16_t ns_bvci); |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 85 | |
Harald Welte | a0f7073 | 2020-12-05 17:50:23 +0100 | [diff] [blame] | 86 | |
Harald Welte | ec0f801 | 2020-12-06 16:32:01 +0100 | [diff] [blame] | 87 | /* generate BVC-STATUS message with cause value derived from TLV-parser error */ |
| 88 | static int tx_status_from_tlvp(enum osmo_tlv_parser_error tlv_p_err, struct msgb *orig_msg) |
| 89 | { |
| 90 | uint8_t bssgp_cause; |
| 91 | switch (tlv_p_err) { |
| 92 | case OSMO_TLVP_ERR_MAND_IE_MISSING: |
| 93 | bssgp_cause = BSSGP_CAUSE_MISSING_MAND_IE; |
| 94 | break; |
| 95 | default: |
| 96 | bssgp_cause = BSSGP_CAUSE_PROTO_ERR_UNSPEC; |
| 97 | } |
| 98 | return bssgp_tx_status(bssgp_cause, NULL, orig_msg); |
| 99 | } |
| 100 | |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 101 | /* strip off the NS header */ |
| 102 | static void strip_ns_hdr(struct msgb *msg) |
| 103 | { |
| 104 | int strip_len = msgb_bssgph(msg) - msg->data; |
| 105 | msgb_pull(msg, strip_len); |
| 106 | } |
| 107 | |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 108 | #if 0 |
Harald Welte | 560bdb3 | 2020-12-04 22:24:47 +0100 | [diff] [blame] | 109 | /* feed a message down the NS-VC associated with the specified bvc */ |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 110 | static int gbprox_relay2sgsn(struct gbproxy_config *cfg, struct msgb *old_msg, |
| 111 | uint16_t ns_bvci, uint16_t sgsn_nsei) |
| 112 | { |
| 113 | /* create a copy of the message so the old one can |
| 114 | * be free()d safely when we return from gbprox_rcvmsg() */ |
Alexander Couzens | 951e133 | 2020-09-22 13:21:46 +0200 | [diff] [blame] | 115 | struct gprs_ns2_inst *nsi = cfg->nsi; |
| 116 | struct osmo_gprs_ns2_prim nsp = {}; |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 117 | struct msgb *msg = bssgp_msgb_copy(old_msg, "msgb_relay2sgsn"); |
| 118 | int rc; |
| 119 | |
Daniel Willmann | 3696dce | 2020-12-02 16:08:02 +0100 | [diff] [blame] | 120 | DEBUGP(DGPRS, "NSE(%05u/BSS)-BVC(%05u) proxying BTS->SGSN NSE(%05u/SGSN)\n", |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 121 | msgb_nsei(msg), ns_bvci, sgsn_nsei); |
| 122 | |
Alexander Couzens | 951e133 | 2020-09-22 13:21:46 +0200 | [diff] [blame] | 123 | nsp.bvci = ns_bvci; |
| 124 | nsp.nsei = sgsn_nsei; |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 125 | |
| 126 | strip_ns_hdr(msg); |
Alexander Couzens | 951e133 | 2020-09-22 13:21:46 +0200 | [diff] [blame] | 127 | osmo_prim_init(&nsp.oph, SAP_NS, PRIM_NS_UNIT_DATA, |
| 128 | PRIM_OP_REQUEST, msg); |
| 129 | rc = gprs_ns2_recv_prim(nsi, &nsp.oph); |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 130 | if (rc < 0) |
| 131 | rate_ctr_inc(&cfg->ctrg->ctr[GBPROX_GLOB_CTR_TX_ERR_SGSN]); |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 132 | return rc; |
| 133 | } |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 134 | #endif |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 135 | |
Daniel Willmann | 7620571 | 2020-11-30 17:08:58 +0100 | [diff] [blame] | 136 | /* feed a message down the NSE */ |
| 137 | static int gbprox_relay2nse(struct msgb *old_msg, struct gbproxy_nse *nse, |
Daniel Willmann | 35f7d33 | 2020-11-03 21:11:45 +0100 | [diff] [blame] | 138 | uint16_t ns_bvci) |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 139 | { |
Daniel Willmann | e50550e | 2020-11-26 18:19:21 +0100 | [diff] [blame] | 140 | OSMO_ASSERT(nse); |
| 141 | OSMO_ASSERT(nse->cfg); |
| 142 | |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 143 | /* create a copy of the message so the old one can |
| 144 | * be free()d safely when we return from gbprox_rcvmsg() */ |
Daniel Willmann | e50550e | 2020-11-26 18:19:21 +0100 | [diff] [blame] | 145 | struct gprs_ns2_inst *nsi = nse->cfg->nsi; |
Alexander Couzens | 951e133 | 2020-09-22 13:21:46 +0200 | [diff] [blame] | 146 | struct osmo_gprs_ns2_prim nsp = {}; |
Daniel Willmann | 7620571 | 2020-11-30 17:08:58 +0100 | [diff] [blame] | 147 | struct msgb *msg = bssgp_msgb_copy(old_msg, "msgb_relay2nse"); |
Harald Welte | fe05958 | 2020-11-18 12:01:46 +0100 | [diff] [blame] | 148 | uint32_t tlli; |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 149 | int rc; |
| 150 | |
Daniel Willmann | 98b1b45 | 2020-12-21 10:40:27 +0100 | [diff] [blame] | 151 | DEBUGP(DGPRS, "NSE(%05u/%s)-BVC(%05u/??) proxying to NSE(%05u/%s)\n", msgb_nsei(msg), |
| 152 | !nse->sgsn_facing ? "SGSN" : "BSS", ns_bvci, nse->nsei, nse->sgsn_facing ? "SGSN" : "BSS"); |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 153 | |
Alexander Couzens | 951e133 | 2020-09-22 13:21:46 +0200 | [diff] [blame] | 154 | nsp.bvci = ns_bvci; |
Daniel Willmann | e50550e | 2020-11-26 18:19:21 +0100 | [diff] [blame] | 155 | nsp.nsei = nse->nsei; |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 156 | |
| 157 | /* Strip the old NS header, it will be replaced with a new one */ |
| 158 | strip_ns_hdr(msg); |
| 159 | |
Harald Welte | fe05958 | 2020-11-18 12:01:46 +0100 | [diff] [blame] | 160 | /* TS 48.018 Section 5.4.2: The link selector parameter is |
| 161 | * defined in 3GPP TS 48.016. At one side of the Gb interface, |
| 162 | * all BSSGP UNITDATA PDUs related to an MS shall be passed with |
| 163 | * the same LSP, e.g. the LSP contains the MS's TLLI, to the |
| 164 | * underlying network service. */ |
| 165 | if (gprs_gb_parse_tlli(msgb_data(msg), msgb_length(msg), &tlli) == 1) |
| 166 | nsp.u.unitdata.link_selector = tlli; |
| 167 | |
Alexander Couzens | 951e133 | 2020-09-22 13:21:46 +0200 | [diff] [blame] | 168 | osmo_prim_init(&nsp.oph, SAP_NS, PRIM_NS_UNIT_DATA, |
| 169 | PRIM_OP_REQUEST, msg); |
| 170 | rc = gprs_ns2_recv_prim(nsi, &nsp.oph); |
Daniel Willmann | 7620571 | 2020-11-30 17:08:58 +0100 | [diff] [blame] | 171 | /* FIXME: We need a counter group for gbproxy_nse */ |
| 172 | //if (rc < 0) |
Harald Welte | 560bdb3 | 2020-12-04 22:24:47 +0100 | [diff] [blame] | 173 | // rate_ctr_inc(&bvc->ctrg->ctr[GBPROX_PEER_CTR_TX_ERR]); |
Daniel Willmann | 7620571 | 2020-11-30 17:08:58 +0100 | [diff] [blame] | 174 | |
| 175 | return rc; |
| 176 | } |
| 177 | |
Harald Welte | 560bdb3 | 2020-12-04 22:24:47 +0100 | [diff] [blame] | 178 | /* feed a message down the NS-VC associated with the specified bvc */ |
| 179 | static int gbprox_relay2peer(struct msgb *old_msg, struct gbproxy_bvc *bvc, |
Daniel Willmann | 7620571 | 2020-11-30 17:08:58 +0100 | [diff] [blame] | 180 | uint16_t ns_bvci) |
| 181 | { |
| 182 | int rc; |
Harald Welte | 560bdb3 | 2020-12-04 22:24:47 +0100 | [diff] [blame] | 183 | struct gbproxy_nse *nse = bvc->nse; |
Daniel Willmann | 7620571 | 2020-11-30 17:08:58 +0100 | [diff] [blame] | 184 | OSMO_ASSERT(nse); |
| 185 | |
| 186 | rc = gbprox_relay2nse(old_msg, nse, ns_bvci); |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 187 | if (rc < 0) |
Harald Welte | 560bdb3 | 2020-12-04 22:24:47 +0100 | [diff] [blame] | 188 | rate_ctr_inc(&bvc->ctrg->ctr[GBPROX_PEER_CTR_TX_ERR]); |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 189 | |
| 190 | return rc; |
| 191 | } |
| 192 | |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 193 | int bssgp_prim_cb(struct osmo_prim_hdr *oph, void *ctx) |
| 194 | { |
| 195 | return 0; |
| 196 | } |
| 197 | |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 198 | |
| 199 | /*********************************************************************** |
| 200 | * PTP BVC handling |
| 201 | ***********************************************************************/ |
| 202 | |
| 203 | /* route an uplink message on a PTP-BVC to a SGSN using the TLLI */ |
| 204 | static int gbprox_bss2sgsn_tlli(struct gbproxy_cell *cell, struct msgb *msg, uint32_t tlli, |
| 205 | bool sig_bvci) |
| 206 | { |
| 207 | struct gbproxy_bvc *sgsn_bvc; |
| 208 | unsigned int i; |
| 209 | |
| 210 | /* FIXME: derive NRI from TLLI */ |
| 211 | /* FIXME: find the SGSN for that NRI */ |
| 212 | |
| 213 | /* HACK: we currently simply pick the first SGSN we find */ |
| 214 | for (i = 0; i < ARRAY_SIZE(cell->sgsn_bvc); i++) { |
| 215 | sgsn_bvc = cell->sgsn_bvc[i]; |
| 216 | if (sgsn_bvc) |
| 217 | return gbprox_relay2peer(msg, sgsn_bvc, sig_bvci ? 0 : sgsn_bvc->bvci); |
| 218 | } |
| 219 | return 0; |
| 220 | } |
| 221 | |
| 222 | static int gbprox_bss2sgsn_null_nri(struct gbproxy_cell *cell, struct msgb *msg) |
| 223 | { |
| 224 | struct gbproxy_bvc *sgsn_bvc; |
| 225 | unsigned int i; |
| 226 | |
| 227 | /* FIXME: find the SGSN for that NRI */ |
| 228 | |
| 229 | /* HACK: we currently simply pick the first SGSN we find */ |
| 230 | for (i = 0; i < ARRAY_SIZE(cell->sgsn_bvc); i++) { |
| 231 | sgsn_bvc = cell->sgsn_bvc[i]; |
| 232 | if (sgsn_bvc) |
| 233 | return gbprox_relay2peer(msg, sgsn_bvc, sgsn_bvc->bvci); |
| 234 | } |
| 235 | return 0; |
| 236 | } |
| 237 | |
| 238 | |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 239 | /* Receive an incoming PTP message from a BSS-side NS-VC */ |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 240 | static int gbprox_rx_ptp_from_bss(struct gbproxy_nse *nse, struct msgb *msg, uint16_t ns_bvci) |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 241 | { |
Harald Welte | 278dd27 | 2020-12-06 13:35:24 +0100 | [diff] [blame] | 242 | struct bssgp_normal_hdr *bgph = (struct bssgp_normal_hdr *) msgb_bssgph(msg); |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 243 | const char *pdut_name = osmo_tlv_prot_msg_name(&osmo_pdef_bssgp, bgph->pdu_type); |
| 244 | struct gbproxy_bvc *bss_bvc; |
| 245 | struct tlv_parsed tp; |
| 246 | char log_pfx[32]; |
| 247 | uint32_t tlli; |
| 248 | int rc; |
| 249 | |
| 250 | snprintf(log_pfx, sizeof(log_pfx), "NSE(%05u/BSS)-BVC(%05u/??)", nse->nsei, ns_bvci); |
| 251 | |
| 252 | LOGP(DGPRS, LOGL_DEBUG, "%s Rx %s\n", log_pfx, pdut_name); |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 253 | |
Daniel Willmann | 06331ac | 2020-12-10 17:59:46 +0100 | [diff] [blame] | 254 | if (ns_bvci == 0 || ns_bvci == 1) { |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 255 | LOGP(DGPRS, LOGL_NOTICE, "%s BVCI=%05u is not PTP\n", log_pfx, ns_bvci); |
Harald Welte | 278dd27 | 2020-12-06 13:35:24 +0100 | [diff] [blame] | 256 | return bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, msg); |
| 257 | } |
| 258 | |
| 259 | if (!(bssgp_pdu_type_flags(bgph->pdu_type) & BSSGP_PDUF_PTP)) { |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 260 | LOGP(DGPRS, LOGL_NOTICE, "%s %s not allowed in PTP BVC\n", log_pfx, pdut_name); |
Harald Welte | 278dd27 | 2020-12-06 13:35:24 +0100 | [diff] [blame] | 261 | return bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, msg); |
| 262 | } |
| 263 | |
| 264 | if (!(bssgp_pdu_type_flags(bgph->pdu_type) & BSSGP_PDUF_UL)) { |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 265 | LOGP(DGPRS, LOGL_NOTICE, "%s %s not allowed in uplink direction\n", log_pfx, pdut_name); |
Harald Welte | 278dd27 | 2020-12-06 13:35:24 +0100 | [diff] [blame] | 266 | return bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, msg); |
| 267 | } |
| 268 | |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 269 | bss_bvc = gbproxy_bvc_by_bvci(nse, ns_bvci); |
| 270 | if (!bss_bvc) { |
| 271 | LOGP(DGPRS, LOGL_NOTICE, "%s %s - Didn't find BVC for PTP message, discarding\n", |
| 272 | log_pfx, pdut_name); |
| 273 | return bssgp_tx_status(BSSGP_CAUSE_UNKNOWN_BVCI, &ns_bvci, msg); |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 274 | } |
| 275 | |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 276 | /* UL_UNITDATA has a different header than all other uplink PDUs */ |
| 277 | if (bgph->pdu_type == BSSGP_PDUT_UL_UNITDATA) { |
| 278 | const struct bssgp_ud_hdr *budh = (struct bssgp_ud_hdr *) msgb_bssgph(msg); |
| 279 | if (msgb_bssgp_len(msg) < sizeof(*budh)) |
| 280 | return bssgp_tx_status(BSSGP_CAUSE_INV_MAND_INF, NULL, msg); |
| 281 | rc = osmo_tlv_prot_parse(&osmo_pdef_bssgp, &tp, 1, bgph->pdu_type, budh->data, |
| 282 | msgb_bssgp_len(msg) - sizeof(*budh), 0, 0, DGPRS, log_pfx); |
| 283 | /* populate TLLI from the fixed headser into the TLV-parsed array so later code |
| 284 | * doesn't have to worry where the TLLI came from */ |
| 285 | tp.lv[BSSGP_IE_TLLI].len = 4; |
| 286 | tp.lv[BSSGP_IE_TLLI].val = (const uint8_t *) &budh->tlli; |
| 287 | } else { |
| 288 | rc = osmo_tlv_prot_parse(&osmo_pdef_bssgp, &tp, 1, bgph->pdu_type, bgph->data, |
| 289 | msgb_bssgp_len(msg) - sizeof(*bgph), 0, 0, DGPRS, log_pfx); |
| 290 | } |
| 291 | if (rc < 0) { |
| 292 | rate_ctr_inc(&nse->cfg->ctrg->ctr[GBPROX_GLOB_CTR_PROTO_ERR_BSS]); |
| 293 | return tx_status_from_tlvp(rc, msg); |
| 294 | } |
Harald Welte | 85a4027 | 2020-12-08 21:43:22 +0100 | [diff] [blame] | 295 | /* hack to get both msg + tlv_parsed passed via osmo_fsm_inst_dispatch */ |
| 296 | msgb_bcid(msg) = (void *)&tp; |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 297 | |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 298 | switch (bgph->pdu_type) { |
| 299 | case BSSGP_PDUT_UL_UNITDATA: |
| 300 | case BSSGP_PDUT_RA_CAPA_UPDATE: |
| 301 | case BSSGP_PDUT_FLOW_CONTROL_MS: |
| 302 | case BSSGP_PDUT_DOWNLOAD_BSS_PFC: |
| 303 | case BSSGP_PDUT_CREATE_BSS_PFC_ACK: |
| 304 | case BSSGP_PDUT_CREATE_BSS_PFC_NACK: |
| 305 | case BSSGP_PDUT_MODIFY_BSS_PFC_ACK: |
| 306 | case BSSGP_PDUT_DELETE_BSS_PFC_ACK: |
| 307 | case BSSGP_PDUT_FLOW_CONTROL_PFC: |
| 308 | case BSSGP_PDUT_DELETE_BSS_PFC_REQ: |
| 309 | case BSSGP_PDUT_PS_HO_REQUIRED: |
| 310 | case BSSGP_PDUT_PS_HO_REQUEST_ACK: |
| 311 | case BSSGP_PDUT_PS_HO_REQUEST_NACK: |
| 312 | case BSSGP_PDUT_PS_HO_COMPLETE: |
| 313 | case BSSGP_PDUT_PS_HO_CANCEL: |
| 314 | /* We can route based on TLLI-NRI */ |
| 315 | tlli = osmo_load32be(TLVP_VAL(&tp, BSSGP_IE_TLLI)); |
| 316 | rc = gbprox_bss2sgsn_tlli(bss_bvc->cell, msg, tlli, false); |
| 317 | break; |
| 318 | case BSSGP_PDUT_RADIO_STATUS: |
| 319 | if (TLVP_PRESENT(&tp, BSSGP_IE_TLLI)) { |
| 320 | tlli = osmo_load32be(TLVP_VAL(&tp, BSSGP_IE_TLLI)); |
| 321 | rc = gbprox_bss2sgsn_tlli(bss_bvc->cell, msg, tlli, false); |
| 322 | } else if (TLVP_PRESENT(&tp, BSSGP_IE_TMSI)) { |
| 323 | /* we treat the TMSI like a TLLI and extract the NRI from it */ |
| 324 | tlli = osmo_load32be(TLVP_VAL(&tp, BSSGP_IE_TMSI)); |
| 325 | rc = gbprox_bss2sgsn_tlli(bss_bvc->cell, msg, tlli, false); |
| 326 | } else if (TLVP_PRESENT(&tp, BSSGP_IE_IMSI)) { |
| 327 | rc = gbprox_bss2sgsn_null_nri(bss_bvc->cell, msg); |
| 328 | } else |
| 329 | LOGPBVC(bss_bvc, LOGL_ERROR, "Rx RADIO-STATUS without any of the conditional IEs\n"); |
| 330 | break; |
| 331 | case BSSGP_PDUT_DUMMY_PAGING_PS_RESP: |
| 332 | case BSSGP_PDUT_PAGING_PS_REJECT: |
| 333 | /* TODO: Implement via state tracking of PAGING-PS + DUMMY_PAGING_PS */ |
| 334 | LOGPBVC(bss_bvc, LOGL_ERROR, "Rx %s: Implementation missing\n", pdut_name); |
| 335 | break; |
| 336 | case BSSGP_PDUT_FLOW_CONTROL_BVC: |
Harald Welte | 85a4027 | 2020-12-08 21:43:22 +0100 | [diff] [blame] | 337 | osmo_fsm_inst_dispatch(bss_bvc->fi, BSSGP_BVCFSM_E_RX_FC_BVC, msg); |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 338 | break; |
| 339 | case BSSGP_PDUT_STATUS: |
| 340 | /* TODO: Implement by inspecting the contained PDU */ |
| 341 | if (!TLVP_PRESENT(&tp, BSSGP_IE_PDU_IN_ERROR)) |
| 342 | break; |
| 343 | LOGPBVC(bss_bvc, LOGL_ERROR, "Rx %s: Implementation missing\n", pdut_name); |
| 344 | break; |
| 345 | } |
| 346 | |
| 347 | return 0; |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 348 | } |
| 349 | |
| 350 | /* Receive an incoming PTP message from a SGSN-side NS-VC */ |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 351 | static int gbprox_rx_ptp_from_sgsn(struct gbproxy_nse *nse, struct msgb *msg, uint16_t ns_bvci) |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 352 | { |
Harald Welte | 278dd27 | 2020-12-06 13:35:24 +0100 | [diff] [blame] | 353 | struct bssgp_normal_hdr *bgph = (struct bssgp_normal_hdr *) msgb_bssgph(msg); |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 354 | const char *pdut_name = osmo_tlv_prot_msg_name(&osmo_pdef_bssgp, bgph->pdu_type); |
| 355 | struct gbproxy_bvc *sgsn_bvc, *bss_bvc; |
Harald Welte | 85a4027 | 2020-12-08 21:43:22 +0100 | [diff] [blame] | 356 | struct tlv_parsed tp; |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 357 | char log_pfx[32]; |
Harald Welte | 85a4027 | 2020-12-08 21:43:22 +0100 | [diff] [blame] | 358 | int rc; |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 359 | |
| 360 | snprintf(log_pfx, sizeof(log_pfx), "NSE(%05u/SGSN)-BVC(%05u/??)", nse->nsei, ns_bvci); |
| 361 | |
| 362 | LOGP(DGPRS, LOGL_DEBUG, "%s Rx %s\n", log_pfx, pdut_name); |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 363 | |
Daniel Willmann | 06331ac | 2020-12-10 17:59:46 +0100 | [diff] [blame] | 364 | if (ns_bvci == 0 || ns_bvci == 1) { |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 365 | LOGP(DGPRS, LOGL_NOTICE, "%s BVCI is not PTP\n", log_pfx); |
Harald Welte | 278dd27 | 2020-12-06 13:35:24 +0100 | [diff] [blame] | 366 | return bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, msg); |
| 367 | } |
| 368 | |
| 369 | if (!(bssgp_pdu_type_flags(bgph->pdu_type) & BSSGP_PDUF_PTP)) { |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 370 | LOGP(DGPRS, LOGL_NOTICE, "%s %s not allowed in PTP BVC\n", log_pfx, pdut_name); |
Harald Welte | 278dd27 | 2020-12-06 13:35:24 +0100 | [diff] [blame] | 371 | return bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, msg); |
| 372 | } |
| 373 | |
| 374 | if (!(bssgp_pdu_type_flags(bgph->pdu_type) & BSSGP_PDUF_DL)) { |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 375 | LOGP(DGPRS, LOGL_NOTICE, "%s %s not allowed in downlink direction\n", log_pfx, pdut_name); |
Harald Welte | 278dd27 | 2020-12-06 13:35:24 +0100 | [diff] [blame] | 376 | return bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, msg); |
| 377 | } |
| 378 | |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 379 | sgsn_bvc = gbproxy_bvc_by_bvci(nse, ns_bvci); |
| 380 | if (!sgsn_bvc) { |
| 381 | LOGP(DGPRS, LOGL_NOTICE, "%s %s - Didn't find BVC for for PTP message, discarding\n", |
| 382 | log_pfx, pdut_name); |
| 383 | rate_ctr_inc(&nse->cfg->ctrg-> ctr[GBPROX_GLOB_CTR_INV_BVCI]); |
| 384 | return bssgp_tx_status(BSSGP_CAUSE_UNKNOWN_BVCI, &ns_bvci, msg); |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 385 | } |
| 386 | |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 387 | if (!bssgp_bvc_fsm_is_unblocked(sgsn_bvc->fi)) { |
| 388 | LOGPBVC(sgsn_bvc, LOGL_NOTICE, "Rx %s: Dropping on blocked BVC\n", pdut_name); |
| 389 | rate_ctr_inc(&sgsn_bvc->ctrg->ctr[GBPROX_PEER_CTR_DROPPED]); |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 390 | return bssgp_tx_status(BSSGP_CAUSE_BVCI_BLOCKED, &ns_bvci, msg); |
| 391 | } |
Harald Welte | 85a4027 | 2020-12-08 21:43:22 +0100 | [diff] [blame] | 392 | |
| 393 | /* DL_UNITDATA has a different header than all other uplink PDUs */ |
| 394 | if (bgph->pdu_type == BSSGP_PDUT_DL_UNITDATA) { |
| 395 | const struct bssgp_ud_hdr *budh = (struct bssgp_ud_hdr *) msgb_bssgph(msg); |
| 396 | if (msgb_bssgp_len(msg) < sizeof(*budh)) |
| 397 | return bssgp_tx_status(BSSGP_CAUSE_INV_MAND_INF, NULL, msg); |
| 398 | rc = osmo_tlv_prot_parse(&osmo_pdef_bssgp, &tp, 1, bgph->pdu_type, budh->data, |
| 399 | msgb_bssgp_len(msg) - sizeof(*budh), 0, 0, DGPRS, log_pfx); |
| 400 | /* populate TLLI from the fixed headser into the TLV-parsed array so later code |
| 401 | * doesn't have to worry where the TLLI came from */ |
| 402 | tp.lv[BSSGP_IE_TLLI].len = 4; |
| 403 | tp.lv[BSSGP_IE_TLLI].val = (const uint8_t *) &budh->tlli; |
| 404 | } else { |
| 405 | rc = osmo_tlv_prot_parse(&osmo_pdef_bssgp, &tp, 1, bgph->pdu_type, bgph->data, |
| 406 | msgb_bssgp_len(msg) - sizeof(*bgph), 0, 0, DGPRS, log_pfx); |
| 407 | } |
| 408 | if (rc < 0) { |
| 409 | rate_ctr_inc(&nse->cfg->ctrg->ctr[GBPROX_GLOB_CTR_PROTO_ERR_BSS]); |
| 410 | return tx_status_from_tlvp(rc, msg); |
| 411 | } |
| 412 | /* hack to get both msg + tlv_parsed passed via osmo_fsm_inst_dispatch */ |
| 413 | msgb_bcid(msg) = (void *)&tp; |
| 414 | |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 415 | OSMO_ASSERT(sgsn_bvc->cell); |
| 416 | bss_bvc = sgsn_bvc->cell->bss_bvc; |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 417 | |
Harald Welte | 85a4027 | 2020-12-08 21:43:22 +0100 | [diff] [blame] | 418 | switch (bgph->pdu_type) { |
| 419 | case BSSGP_PDUT_FLOW_CONTROL_BVC_ACK: |
| 420 | return osmo_fsm_inst_dispatch(sgsn_bvc->fi, BSSGP_BVCFSM_E_RX_FC_BVC_ACK, msg); |
| 421 | default: |
| 422 | return gbprox_relay2peer(msg, bss_bvc, bss_bvc->bvci); |
| 423 | } |
| 424 | |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 425 | } |
| 426 | |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 427 | /*********************************************************************** |
| 428 | * BVC FSM call-backs |
| 429 | ***********************************************************************/ |
Harald Welte | 7df1e5a | 2020-12-02 22:53:26 +0100 | [diff] [blame] | 430 | |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 431 | /* helper function to dispatch a FSM event to all SGSN-side BVC FSMs of a cell */ |
| 432 | static void dispatch_to_all_sgsn_bvc(struct gbproxy_cell *cell, uint32_t event, void *priv) |
| 433 | { |
| 434 | unsigned int i; |
| 435 | |
| 436 | for (i = 0; i < ARRAY_SIZE(cell->sgsn_bvc); i++) { |
| 437 | struct gbproxy_bvc *sgsn_bvc = cell->sgsn_bvc[i]; |
| 438 | if (!sgsn_bvc) |
| 439 | continue; |
| 440 | osmo_fsm_inst_dispatch(sgsn_bvc->fi, event, priv); |
| 441 | } |
| 442 | } |
| 443 | |
| 444 | /* BVC FSM informs us about a BSS-side reset of the signaling BVC */ |
| 445 | static void bss_sig_bvc_reset_notif(uint16_t nsei, uint16_t bvci, const struct gprs_ra_id *ra_id, |
| 446 | uint16_t cell_id, uint8_t cause, void *priv) |
| 447 | { |
| 448 | struct gbproxy_bvc *sig_bvc = priv; |
| 449 | struct gbproxy_nse *nse = sig_bvc->nse; |
| 450 | struct gbproxy_bvc *ptp_bvc; |
| 451 | unsigned int i; |
| 452 | |
| 453 | /* BLOCK all SGSN-side PTP BVC within this NSE */ |
| 454 | hash_for_each(nse->bvcs, i, ptp_bvc, list) { |
| 455 | if (ptp_bvc == sig_bvc) |
| 456 | continue; |
| 457 | OSMO_ASSERT(ptp_bvc->cell); |
| 458 | |
| 459 | dispatch_to_all_sgsn_bvc(ptp_bvc->cell, BSSGP_BVCFSM_E_REQ_BLOCK, &cause); |
Harald Welte | f9e149b | 2020-12-02 23:29:38 +0100 | [diff] [blame] | 460 | } |
Harald Welte | 7df1e5a | 2020-12-02 22:53:26 +0100 | [diff] [blame] | 461 | |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 462 | /* Delete all BSS-side PTP BVC within this NSE */ |
| 463 | gbproxy_cleanup_bvcs(nse, 0); |
| 464 | |
| 465 | /* TODO: we keep the "CELL" around for now, re-connecting it to |
| 466 | * any (later) new PTP-BVC for that BVCI. Not sure if that's the |
| 467 | * best idea ? */ |
| 468 | } |
| 469 | |
| 470 | /* forward declaration */ |
| 471 | static const struct bssgp_bvc_fsm_ops sgsn_ptp_bvc_fsm_ops; |
| 472 | |
| 473 | static const struct bssgp_bvc_fsm_ops bss_sig_bvc_fsm_ops = { |
| 474 | .reset_notification = bss_sig_bvc_reset_notif, |
| 475 | }; |
| 476 | |
| 477 | /* BVC FSM informs us about a BSS-side reset of a PTP BVC */ |
| 478 | static void bss_ptp_bvc_reset_notif(uint16_t nsei, uint16_t bvci, const struct gprs_ra_id *ra_id, |
| 479 | uint16_t cell_id, uint8_t cause, void *priv) |
| 480 | { |
| 481 | struct gbproxy_bvc *bvc = priv; |
| 482 | struct gbproxy_config *cfg = bvc->nse->cfg; |
Harald Welte | 664c24e | 2020-12-12 15:01:17 +0100 | [diff] [blame] | 483 | struct gbproxy_nse *sgsn_nse; |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 484 | unsigned int i; |
| 485 | |
| 486 | OSMO_ASSERT(bvci != 0); |
| 487 | |
| 488 | if (!bvc->cell) { |
| 489 | /* see if we have a CELL dangling around */ |
| 490 | bvc->cell = gbproxy_cell_by_bvci(cfg, bvci); |
| 491 | if (bvc->cell) { |
| 492 | /* the CELL already exists. This means either it * was created before at an |
| 493 | * earlier PTP BVC-RESET, or that there are non-unique BVCIs and hence a |
| 494 | * malconfiguration */ |
| 495 | if (bvc->cell->bss_bvc) { |
| 496 | LOGPBVC(bvc, LOGL_NOTICE, "Rx BVC-RESET via this NSE, but CELL already " |
| 497 | "has BVC on NSEI=%05u\n", bvc->cell->bss_bvc->nse->nsei); |
| 498 | LOGPBVC(bvc->cell->bss_bvc, LOGL_NOTICE, "Destroying due to conflicting " |
| 499 | "BVCI configuration (new NSEI=%05u)!\n", bvc->nse->nsei); |
| 500 | gbproxy_bvc_free(bvc->cell->bss_bvc); |
| 501 | } |
| 502 | bvc->cell->bss_bvc = bvc; |
| 503 | } |
| 504 | } |
| 505 | |
| 506 | if (!bvc->cell) { |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 507 | /* if we end up here, it means this is the first time we received a BVC-RESET |
| 508 | * for this BVC. We need to create the 'cell' data structure and the SGSN-side |
| 509 | * BVC counterparts */ |
| 510 | |
| 511 | bvc->cell = gbproxy_cell_alloc(cfg, bvci); |
| 512 | OSMO_ASSERT(bvc->cell); |
Harald Welte | ee0cc81 | 2020-12-12 14:22:32 +0100 | [diff] [blame] | 513 | memcpy(bvc->cell->ra, bvc->ra, sizeof(bvc->cell->ra)); |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 514 | |
| 515 | /* link us to the cell and vice-versa */ |
| 516 | bvc->cell->bss_bvc = bvc; |
Harald Welte | 664c24e | 2020-12-12 15:01:17 +0100 | [diff] [blame] | 517 | } |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 518 | |
Harald Welte | 664c24e | 2020-12-12 15:01:17 +0100 | [diff] [blame] | 519 | /* allocate (any missing) SGSN-side BVCs within the cell, and reset them */ |
| 520 | hash_for_each(cfg->sgsn_nses, i, sgsn_nse, list) { |
| 521 | struct gbproxy_bvc *sgsn_bvc = gbproxy_bvc_by_bvci(sgsn_nse, bvci); |
| 522 | if (sgsn_bvc) |
| 523 | OSMO_ASSERT(sgsn_bvc->cell == bvc->cell || !sgsn_bvc->cell); |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 524 | |
Harald Welte | 664c24e | 2020-12-12 15:01:17 +0100 | [diff] [blame] | 525 | if (!sgsn_bvc) { |
| 526 | sgsn_bvc = gbproxy_bvc_alloc(sgsn_nse, bvci); |
| 527 | OSMO_ASSERT(sgsn_bvc); |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 528 | |
Harald Welte | 664c24e | 2020-12-12 15:01:17 +0100 | [diff] [blame] | 529 | sgsn_bvc->cell = bvc->cell; |
| 530 | memcpy(sgsn_bvc->ra, bvc->cell->ra, sizeof(sgsn_bvc->ra)); |
| 531 | sgsn_bvc->fi = bssgp_bvc_fsm_alloc_ptp_bss(sgsn_bvc, cfg->nsi, sgsn_nse->nsei, |
| 532 | bvci, ra_id, cell_id); |
| 533 | OSMO_ASSERT(sgsn_bvc->fi); |
| 534 | bssgp_bvc_fsm_set_ops(sgsn_bvc->fi, &sgsn_ptp_bvc_fsm_ops, sgsn_bvc); |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 535 | |
Harald Welte | 664c24e | 2020-12-12 15:01:17 +0100 | [diff] [blame] | 536 | gbproxy_cell_add_sgsn_bvc(bvc->cell, sgsn_bvc); |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 537 | } |
| 538 | } |
| 539 | |
| 540 | /* Trigger outbound BVC-RESET procedure toward each SGSN */ |
| 541 | dispatch_to_all_sgsn_bvc(bvc->cell, BSSGP_BVCFSM_E_REQ_RESET, &cause); |
| 542 | } |
| 543 | |
| 544 | /* BVC FSM informs us about a BSS-side FSM state change */ |
| 545 | static void bss_ptp_bvc_state_chg_notif(uint16_t nsei, uint16_t bvci, int old_state, int state, void *priv) |
| 546 | { |
| 547 | struct gbproxy_bvc *bvc = priv; |
| 548 | struct gbproxy_cell *cell = bvc->cell; |
| 549 | uint8_t cause = bssgp_bvc_fsm_get_block_cause(bvc->fi); |
| 550 | |
| 551 | /* we have just been created but due to callback ordering the cell is not associated */ |
| 552 | if (!cell) |
| 553 | return; |
| 554 | |
| 555 | switch (state) { |
| 556 | case BSSGP_BVCFSM_S_BLOCKED: |
| 557 | /* block the corresponding SGSN-side PTP BVCs */ |
| 558 | dispatch_to_all_sgsn_bvc(cell, BSSGP_BVCFSM_E_REQ_BLOCK, &cause); |
| 559 | break; |
| 560 | case BSSGP_BVCFSM_S_UNBLOCKED: |
| 561 | /* unblock the corresponding SGSN-side PTP BVCs */ |
| 562 | dispatch_to_all_sgsn_bvc(cell, BSSGP_BVCFSM_E_REQ_UNBLOCK, NULL); |
| 563 | break; |
| 564 | } |
| 565 | } |
| 566 | |
Harald Welte | 85a4027 | 2020-12-08 21:43:22 +0100 | [diff] [blame] | 567 | /* BVC FSM informs us about BVC-FC PDU receive */ |
| 568 | static void bss_ptp_bvc_fc_bvc(uint16_t nsei, uint16_t bvci, const struct bssgp2_flow_ctrl *fc, void *priv) |
| 569 | { |
Harald Welte | 209dc9f | 2020-12-12 19:02:16 +0100 | [diff] [blame] | 570 | struct bssgp2_flow_ctrl fc_reduced; |
Harald Welte | 85a4027 | 2020-12-08 21:43:22 +0100 | [diff] [blame] | 571 | struct gbproxy_bvc *bss_bvc = priv; |
Harald Welte | 209dc9f | 2020-12-12 19:02:16 +0100 | [diff] [blame] | 572 | struct gbproxy_cell *cell; |
| 573 | struct gbproxy_config *cfg; |
Harald Welte | 85a4027 | 2020-12-08 21:43:22 +0100 | [diff] [blame] | 574 | |
Harald Welte | 209dc9f | 2020-12-12 19:02:16 +0100 | [diff] [blame] | 575 | OSMO_ASSERT(bss_bvc); |
| 576 | OSMO_ASSERT(fc); |
| 577 | |
| 578 | cell = bss_bvc->cell; |
Harald Welte | 85a4027 | 2020-12-08 21:43:22 +0100 | [diff] [blame] | 579 | if (!cell) |
| 580 | return; |
| 581 | |
Harald Welte | 209dc9f | 2020-12-12 19:02:16 +0100 | [diff] [blame] | 582 | cfg = cell->cfg; |
Harald Welte | 85a4027 | 2020-12-08 21:43:22 +0100 | [diff] [blame] | 583 | |
Harald Welte | 209dc9f | 2020-12-12 19:02:16 +0100 | [diff] [blame] | 584 | /* reduce / scale according to configuration to make sure we only advertise a fraction |
| 585 | * of the capacity to each of the SGSNs in the pool */ |
| 586 | fc_reduced = *fc; |
| 587 | fc_reduced.bucket_size_max = (fc->bucket_size_max * cfg->pool.bvc_fc_ratio) / 100; |
| 588 | fc_reduced.bucket_leak_rate = (fc->bucket_leak_rate * cfg->pool.bvc_fc_ratio) / 100; |
| 589 | /* we don't modify the per-MS related values as any single MS is only served by one SGSN */ |
| 590 | |
| 591 | dispatch_to_all_sgsn_bvc(cell, BSSGP_BVCFSM_E_REQ_FC_BVC, (void *) &fc_reduced); |
Harald Welte | 85a4027 | 2020-12-08 21:43:22 +0100 | [diff] [blame] | 592 | } |
| 593 | |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 594 | static const struct bssgp_bvc_fsm_ops bss_ptp_bvc_fsm_ops = { |
| 595 | .reset_notification = bss_ptp_bvc_reset_notif, |
| 596 | .state_chg_notification = bss_ptp_bvc_state_chg_notif, |
Harald Welte | 85a4027 | 2020-12-08 21:43:22 +0100 | [diff] [blame] | 597 | .rx_fc_bvc = bss_ptp_bvc_fc_bvc, |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 598 | }; |
| 599 | |
| 600 | /* BVC FSM informs us about a SGSN-side reset of a PTP BVC */ |
| 601 | static void sgsn_ptp_bvc_reset_notif(uint16_t nsei, uint16_t bvci, const struct gprs_ra_id *ra_id, |
| 602 | uint16_t cell_id, uint8_t cause, void *priv) |
| 603 | { |
| 604 | struct gbproxy_bvc *bvc = priv; |
| 605 | |
| 606 | if (!bvc->cell) { |
| 607 | LOGPBVC(bvc, LOGL_ERROR, "RESET of PTP BVC on SGSN side for which we have no BSS?\n"); |
| 608 | return; |
| 609 | } |
| 610 | |
| 611 | OSMO_ASSERT(bvc->cell->bss_bvc); |
| 612 | |
| 613 | /* request reset of BSS-facing PTP-BVC */ |
| 614 | osmo_fsm_inst_dispatch(bvc->cell->bss_bvc->fi, BSSGP_BVCFSM_E_REQ_RESET, &cause); |
| 615 | } |
| 616 | |
| 617 | static const struct bssgp_bvc_fsm_ops sgsn_ptp_bvc_fsm_ops = { |
| 618 | .reset_notification = sgsn_ptp_bvc_reset_notif, |
| 619 | }; |
| 620 | |
| 621 | /* BVC FSM informs us about a SGSN-side reset of the signaling BVC */ |
| 622 | static void sgsn_sig_bvc_reset_notif(uint16_t nsei, uint16_t bvci, const struct gprs_ra_id *ra_id, |
| 623 | uint16_t cell_id, uint8_t cause, void *priv) |
| 624 | { |
| 625 | struct gbproxy_bvc *bvc = priv; |
| 626 | struct gbproxy_config *cfg = bvc->nse->cfg; |
| 627 | struct gbproxy_nse *bss_nse; |
| 628 | unsigned int i; |
| 629 | |
| 630 | /* delete all SGSN-side PTP BVC for this SGSN */ |
| 631 | gbproxy_cleanup_bvcs(bvc->nse, 0); |
| 632 | /* FIXME: what to do about the cells? */ |
| 633 | /* FIXME: do we really want to RESET all signaling BVC on the BSS and affect all other SGSN? */ |
| 634 | |
| 635 | /* we need to trigger generating a reset procedure towards each BSS side signaling BVC */ |
| 636 | hash_for_each(cfg->bss_nses, i, bss_nse, list) { |
| 637 | struct gbproxy_bvc *bss_bvc = gbproxy_bvc_by_bvci(bss_nse, 0); |
| 638 | if (!bss_bvc) { |
| 639 | LOGPNSE(bss_nse, LOGL_ERROR, "Doesn't have BVC with BVCI=0 ?!?\n"); |
| 640 | continue; |
| 641 | } |
| 642 | osmo_fsm_inst_dispatch(bss_bvc->fi, BSSGP_BVCFSM_E_REQ_RESET, &cause); |
| 643 | } |
| 644 | } |
| 645 | |
| 646 | const struct bssgp_bvc_fsm_ops sgsn_sig_bvc_fsm_ops = { |
| 647 | .reset_notification = sgsn_sig_bvc_reset_notif, |
| 648 | }; |
| 649 | |
| 650 | /*********************************************************************** |
| 651 | * Signaling BVC handling |
| 652 | ***********************************************************************/ |
| 653 | |
| 654 | /* process a BVC-RESET message from the BSS side */ |
| 655 | static int rx_bvc_reset_from_bss(struct gbproxy_nse *nse, struct msgb *msg, struct tlv_parsed *tp) |
| 656 | { |
| 657 | struct gbproxy_bvc *from_bvc = NULL; |
| 658 | uint16_t bvci = ntohs(tlvp_val16_unal(tp, BSSGP_IE_BVCI)); |
| 659 | uint32_t features = 0; // FIXME: make configurable |
| 660 | |
| 661 | LOGPNSE(nse, LOGL_INFO, "Rx BVC-RESET (BVCI=%05u)\n", bvci); |
| 662 | |
Harald Welte | 314647b | 2020-12-02 23:03:22 +0100 | [diff] [blame] | 663 | if (bvci == 0) { |
| 664 | /* If we receive a BVC reset on the signalling endpoint, we |
| 665 | * don't want the SGSN to reset, as the signalling endpoint |
| 666 | * is common for all point-to-point BVCs (and thus all BTS) */ |
Harald Welte | 324f065 | 2020-12-02 23:06:37 +0100 | [diff] [blame] | 667 | |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 668 | from_bvc = gbproxy_bvc_by_bvci(nse, 0); |
Harald Welte | 560bdb3 | 2020-12-04 22:24:47 +0100 | [diff] [blame] | 669 | if (!from_bvc) { |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 670 | from_bvc = gbproxy_bvc_alloc(nse, 0); |
| 671 | OSMO_ASSERT(from_bvc); |
| 672 | from_bvc->fi = bssgp_bvc_fsm_alloc_sig_sgsn(from_bvc, nse->cfg->nsi, nse->nsei, features); |
| 673 | if (!from_bvc->fi) { |
| 674 | LOGPNSE(nse, LOGL_ERROR, "Cannot allocate SIG-BVC FSM\n"); |
| 675 | gbproxy_bvc_free(from_bvc); |
| 676 | return -ENOMEM; |
Harald Welte | 7df1e5a | 2020-12-02 22:53:26 +0100 | [diff] [blame] | 677 | } |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 678 | bssgp_bvc_fsm_set_ops(from_bvc->fi, &bss_sig_bvc_fsm_ops, from_bvc); |
| 679 | } |
| 680 | } else { |
| 681 | from_bvc = gbproxy_bvc_by_bvci(nse, bvci); |
| 682 | if (!from_bvc) { |
Harald Welte | 7df1e5a | 2020-12-02 22:53:26 +0100 | [diff] [blame] | 683 | /* if a PTP-BVC is reset, and we don't know that |
Harald Welte | 560bdb3 | 2020-12-04 22:24:47 +0100 | [diff] [blame] | 684 | * PTP-BVCI yet, we should allocate a new bvc */ |
| 685 | from_bvc = gbproxy_bvc_alloc(nse, bvci); |
| 686 | OSMO_ASSERT(from_bvc); |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 687 | from_bvc->fi = bssgp_bvc_fsm_alloc_ptp_sgsn(from_bvc, nse->cfg->nsi, |
| 688 | nse->nsei, bvci); |
| 689 | if (!from_bvc->fi) { |
| 690 | LOGPNSE(nse, LOGL_ERROR, "Cannot allocate SIG-BVC FSM\n"); |
| 691 | gbproxy_bvc_free(from_bvc); |
| 692 | return -ENOMEM; |
| 693 | } |
| 694 | bssgp_bvc_fsm_set_ops(from_bvc->fi, &bss_ptp_bvc_fsm_ops, from_bvc); |
Harald Welte | 7df1e5a | 2020-12-02 22:53:26 +0100 | [diff] [blame] | 695 | } |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 696 | #if 0 |
Harald Welte | 7df1e5a | 2020-12-02 22:53:26 +0100 | [diff] [blame] | 697 | /* Could have moved to a different NSE */ |
Harald Welte | 560bdb3 | 2020-12-04 22:24:47 +0100 | [diff] [blame] | 698 | if (!check_bvc_nsei(from_bvc, nsei)) { |
| 699 | LOGPBVC(from_bvc, LOGL_NOTICE, "moving bvc to NSE(%05u)\n", nsei); |
Harald Welte | 7df1e5a | 2020-12-02 22:53:26 +0100 | [diff] [blame] | 700 | |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 701 | struct gbproxy_nse *nse_new = gbproxy_nse_by_nsei(cfg, nsei, false); |
Harald Welte | 7df1e5a | 2020-12-02 22:53:26 +0100 | [diff] [blame] | 702 | if (!nse_new) { |
| 703 | LOGP(DGPRS, LOGL_NOTICE, "NSE(%05u) Got PtP BVC reset before signalling reset for " |
| 704 | "BVCI=%05u\n", bvci, nsei); |
| 705 | bssgp_tx_status(BSSGP_CAUSE_PDU_INCOMP_STATE, NULL, msg); |
| 706 | return 0; |
| 707 | } |
| 708 | |
Harald Welte | 560bdb3 | 2020-12-04 22:24:47 +0100 | [diff] [blame] | 709 | /* Move bvc to different NSE */ |
| 710 | gbproxy_bvc_move(from_bvc, nse_new); |
Harald Welte | 7df1e5a | 2020-12-02 22:53:26 +0100 | [diff] [blame] | 711 | } |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 712 | #endif |
| 713 | /* FIXME: do we need this, if it happens within FSM? */ |
Harald Welte | 173a182 | 2020-12-03 15:36:59 +0100 | [diff] [blame] | 714 | if (TLVP_PRES_LEN(tp, BSSGP_IE_CELL_ID, 8)) { |
Harald Welte | 7df1e5a | 2020-12-02 22:53:26 +0100 | [diff] [blame] | 715 | struct gprs_ra_id raid; |
| 716 | /* We have a Cell Identifier present in this |
| 717 | * PDU, this means we can extend our local |
| 718 | * state information about this particular cell |
| 719 | * */ |
Harald Welte | 560bdb3 | 2020-12-04 22:24:47 +0100 | [diff] [blame] | 720 | memcpy(from_bvc->ra, TLVP_VAL(tp, BSSGP_IE_CELL_ID), sizeof(from_bvc->ra)); |
| 721 | gsm48_parse_ra(&raid, from_bvc->ra); |
| 722 | LOGPBVC(from_bvc, LOGL_INFO, "Cell ID %s\n", osmo_rai_name(&raid)); |
Harald Welte | 7df1e5a | 2020-12-02 22:53:26 +0100 | [diff] [blame] | 723 | } |
Harald Welte | 7df1e5a | 2020-12-02 22:53:26 +0100 | [diff] [blame] | 724 | } |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 725 | /* hand into FSM for further processing */ |
| 726 | osmo_fsm_inst_dispatch(from_bvc->fi, BSSGP_BVCFSM_E_RX_RESET, msg); |
| 727 | return 0; |
Harald Welte | 7df1e5a | 2020-12-02 22:53:26 +0100 | [diff] [blame] | 728 | } |
| 729 | |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 730 | /* Receive an incoming signalling message from a BSS-side NS-VC */ |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 731 | static int gbprox_rx_sig_from_bss(struct gbproxy_nse *nse, struct msgb *msg, uint16_t ns_bvci) |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 732 | { |
| 733 | struct bssgp_normal_hdr *bgph = (struct bssgp_normal_hdr *) msgb_bssgph(msg); |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 734 | uint8_t pdu_type = bgph->pdu_type; |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 735 | const char *pdut_name = osmo_tlv_prot_msg_name(&osmo_pdef_bssgp, bgph->pdu_type); |
| 736 | struct tlv_parsed tp; |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 737 | int data_len = msgb_bssgp_len(msg) - sizeof(*bgph); |
Harald Welte | 560bdb3 | 2020-12-04 22:24:47 +0100 | [diff] [blame] | 738 | struct gbproxy_bvc *from_bvc = NULL; |
Harald Welte | ec0f801 | 2020-12-06 16:32:01 +0100 | [diff] [blame] | 739 | char log_pfx[32]; |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 740 | uint16_t ptp_bvci; |
| 741 | uint32_t tlli; |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 742 | int rc; |
| 743 | |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 744 | snprintf(log_pfx, sizeof(log_pfx), "NSE(%05u/BSS)-BVC(%05u/??)", nse->nsei, ns_bvci); |
| 745 | |
| 746 | LOGP(DGPRS, LOGL_DEBUG, "%s Rx %s\n", log_pfx, pdut_name); |
Harald Welte | ec0f801 | 2020-12-06 16:32:01 +0100 | [diff] [blame] | 747 | |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 748 | if (ns_bvci != 0 && ns_bvci != 1) { |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 749 | LOGP(DGPRS, LOGL_NOTICE, "%s %s BVCI=%05u is not signalling\n", log_pfx, pdut_name, ns_bvci); |
Harald Welte | 278dd27 | 2020-12-06 13:35:24 +0100 | [diff] [blame] | 750 | return bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, msg); |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 751 | } |
| 752 | |
Harald Welte | 278dd27 | 2020-12-06 13:35:24 +0100 | [diff] [blame] | 753 | if (!(bssgp_pdu_type_flags(pdu_type) & BSSGP_PDUF_SIG)) { |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 754 | LOGP(DGPRS, LOGL_NOTICE, "%s %s not allowed in signalling BVC\n", log_pfx, pdut_name); |
Harald Welte | 278dd27 | 2020-12-06 13:35:24 +0100 | [diff] [blame] | 755 | return bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, msg); |
| 756 | } |
| 757 | |
| 758 | if (!(bssgp_pdu_type_flags(pdu_type) & BSSGP_PDUF_UL)) { |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 759 | LOGP(DGPRS, LOGL_NOTICE, "%s %s not allowed in uplink direction\n", log_pfx, pdut_name); |
Harald Welte | 278dd27 | 2020-12-06 13:35:24 +0100 | [diff] [blame] | 760 | return bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, msg); |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 761 | } |
| 762 | |
Harald Welte | ec0f801 | 2020-12-06 16:32:01 +0100 | [diff] [blame] | 763 | rc = osmo_tlv_prot_parse(&osmo_pdef_bssgp, &tp, 1, pdu_type, bgph->data, data_len, 0, 0, |
| 764 | DGPRS, log_pfx); |
| 765 | if (rc < 0) { |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 766 | rate_ctr_inc(&nse->cfg->ctrg->ctr[GBPROX_GLOB_CTR_PROTO_ERR_BSS]); |
Harald Welte | ec0f801 | 2020-12-06 16:32:01 +0100 | [diff] [blame] | 767 | return tx_status_from_tlvp(rc, msg); |
| 768 | } |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 769 | /* hack to get both msg + tlv_parsed passed via osmo_fsm_inst_dispatch */ |
| 770 | msgb_bcid(msg) = (void *)&tp; |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 771 | |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 772 | /* special case handling for some PDU types */ |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 773 | switch (pdu_type) { |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 774 | case BSSGP_PDUT_BVC_RESET: |
| 775 | /* resolve or create gbproxy_bvc + handlei n BVC-FSM */ |
| 776 | ptp_bvci = ntohs(tlvp_val16_unal(&tp, BSSGP_IE_BVCI)); |
| 777 | return rx_bvc_reset_from_bss(nse, msg, &tp); |
| 778 | case BSSGP_PDUT_BVC_RESET_ACK: |
| 779 | ptp_bvci = ntohs(tlvp_val16_unal(&tp, BSSGP_IE_BVCI)); |
| 780 | from_bvc = gbproxy_bvc_by_bvci(nse, ptp_bvci); |
Harald Welte | 560bdb3 | 2020-12-04 22:24:47 +0100 | [diff] [blame] | 781 | if (!from_bvc) |
| 782 | goto err_no_bvc; |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 783 | return osmo_fsm_inst_dispatch(from_bvc->fi, BSSGP_BVCFSM_E_RX_RESET_ACK, msg); |
| 784 | case BSSGP_PDUT_BVC_BLOCK: |
| 785 | ptp_bvci = ntohs(tlvp_val16_unal(&tp, BSSGP_IE_BVCI)); |
| 786 | from_bvc = gbproxy_bvc_by_bvci(nse, ptp_bvci); |
| 787 | if (!from_bvc) |
| 788 | goto err_no_bvc; |
| 789 | return osmo_fsm_inst_dispatch(from_bvc->fi, BSSGP_BVCFSM_E_RX_BLOCK, msg); |
| 790 | case BSSGP_PDUT_BVC_UNBLOCK: |
| 791 | ptp_bvci = ntohs(tlvp_val16_unal(&tp, BSSGP_IE_BVCI)); |
| 792 | from_bvc = gbproxy_bvc_by_bvci(nse, ptp_bvci); |
| 793 | if (!from_bvc) |
| 794 | goto err_no_bvc; |
| 795 | return osmo_fsm_inst_dispatch(from_bvc->fi, BSSGP_BVCFSM_E_RX_UNBLOCK, msg); |
| 796 | case BSSGP_PDUT_SUSPEND: |
| 797 | case BSSGP_PDUT_RESUME: |
| 798 | /* FIXME: Implement TLLI Cache. Every SUSPEND/RESUME we must |
| 799 | * take record of the TLLI->BVC mapping so we can map |
| 800 | * back from TLLI->BVC when the SUSPEND/RESUME-ACK |
| 801 | * arrives. Cache should have a timeout of 1-3 seconds |
| 802 | * and the ACK should explicitly delete entries. */ |
| 803 | #if 0 |
| 804 | /* TODO: Validate the RAI for consistency with the RAI |
| 805 | * we expect for any of the BVC within this BSS side NSE */ |
| 806 | memcpy(ra, TLVP_VAL(&tp, BSSGP_IE_ROUTEING_AREA), sizeof(from_bvc->ra)); |
Harald Welte | 560bdb3 | 2020-12-04 22:24:47 +0100 | [diff] [blame] | 807 | gsm48_parse_ra(&raid, from_bvc->ra); |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 808 | #endif |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 809 | break; |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 810 | case BSSGP_PDUT_STATUS: |
| 811 | /* FIXME: inspect the erroneous PDU IE (if any) and check |
| 812 | * if we can extract a TLLI/RNI to route it to the correct SGSN */ |
| 813 | break; |
| 814 | case BSSGP_PDUT_RAN_INFO: |
| 815 | case BSSGP_PDUT_RAN_INFO_REQ: |
| 816 | case BSSGP_PDUT_RAN_INFO_ACK: |
| 817 | case BSSGP_PDUT_RAN_INFO_ERROR: |
| 818 | case BSSGP_PDUT_RAN_INFO_APP_ERROR: |
| 819 | /* FIXME: route based in RIM Routing IE */ |
| 820 | rc = bssgp_tx_status(BSSGP_CAUSE_PDU_INCOMP_FEAT, NULL, msg); |
| 821 | break; |
| 822 | case BSSGP_PDUT_LLC_DISCARD: |
| 823 | case BSSGP_PDUT_FLUSH_LL_ACK: |
| 824 | /* route based on BVCI + TLLI */ |
| 825 | ptp_bvci = ntohs(tlvp_val16_unal(&tp, BSSGP_IE_BVCI)); |
| 826 | tlli = osmo_load32be(TLVP_VAL(&tp, BSSGP_IE_TLLI)); |
| 827 | from_bvc = gbproxy_bvc_by_bvci(nse, ptp_bvci); |
| 828 | if (!from_bvc) |
| 829 | goto err_no_bvc; |
| 830 | gbprox_bss2sgsn_tlli(from_bvc->cell, msg, tlli, true); |
| 831 | break; |
| 832 | default: |
| 833 | LOGPNSE(nse, LOGL_ERROR, "Rx %s: Implementation missing\n", pdut_name); |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 834 | break; |
| 835 | } |
| 836 | |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 837 | return rc; |
Harald Welte | 560bdb3 | 2020-12-04 22:24:47 +0100 | [diff] [blame] | 838 | err_no_bvc: |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 839 | LOGPNSE(nse, LOGL_ERROR, "Rx %s: cannot find BVC for BVCI=%05u\n", pdut_name, ptp_bvci); |
| 840 | rate_ctr_inc(&nse->cfg->ctrg->ctr[GBPROX_GLOB_CTR_INV_NSEI]); |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 841 | return bssgp_tx_status(BSSGP_CAUSE_INV_MAND_INF, NULL, msg); |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 842 | } |
| 843 | |
| 844 | /* Receive paging request from SGSN, we need to relay to proper BSS */ |
Harald Welte | df690e8 | 2020-12-12 15:58:28 +0100 | [diff] [blame] | 845 | static int gbprox_rx_paging(struct gbproxy_nse *sgsn_nse, struct msgb *msg, const char *pdut_name, |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 846 | struct tlv_parsed *tp, uint16_t ns_bvci) |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 847 | { |
Harald Welte | df690e8 | 2020-12-12 15:58:28 +0100 | [diff] [blame] | 848 | struct gbproxy_config *cfg = sgsn_nse->cfg; |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 849 | struct gbproxy_bvc *sgsn_bvc, *bss_bvc; |
Harald Welte | df690e8 | 2020-12-12 15:58:28 +0100 | [diff] [blame] | 850 | struct gbproxy_nse *nse; |
Daniel Willmann | 7620571 | 2020-11-30 17:08:58 +0100 | [diff] [blame] | 851 | unsigned int n_nses = 0; |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 852 | int errctr = GBPROX_GLOB_CTR_PROTO_ERR_SGSN; |
Harald Welte | 8b4c794 | 2020-12-05 10:14:49 +0100 | [diff] [blame] | 853 | int i, j; |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 854 | |
Daniel Willmann | e50550e | 2020-11-26 18:19:21 +0100 | [diff] [blame] | 855 | /* FIXME: Handle paging logic to only page each matching NSE */ |
| 856 | |
Harald Welte | 173a182 | 2020-12-03 15:36:59 +0100 | [diff] [blame] | 857 | if (TLVP_PRES_LEN(tp, BSSGP_IE_BVCI, 2)) { |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 858 | uint16_t bvci = ntohs(tlvp_val16_unal(tp, BSSGP_IE_BVCI)); |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 859 | errctr = GBPROX_GLOB_CTR_OTHER_ERR; |
Harald Welte | df690e8 | 2020-12-12 15:58:28 +0100 | [diff] [blame] | 860 | sgsn_bvc = gbproxy_bvc_by_bvci(sgsn_nse, bvci); |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 861 | if (!sgsn_bvc) { |
Harald Welte | df690e8 | 2020-12-12 15:58:28 +0100 | [diff] [blame] | 862 | LOGPNSE(sgsn_nse, LOGL_NOTICE, "Rx %s: unable to route: BVCI=%05u unknown\n", |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 863 | pdut_name, bvci); |
Harald Welte | 3d1bd4d | 2020-11-23 15:14:20 +0100 | [diff] [blame] | 864 | rate_ctr_inc(&cfg->ctrg->ctr[errctr]); |
| 865 | return -EINVAL; |
| 866 | } |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 867 | LOGPBVC(sgsn_bvc, LOGL_INFO, "Rx %s: routing by BVCI\n", pdut_name); |
| 868 | return gbprox_relay2peer(msg, sgsn_bvc->cell->bss_bvc, ns_bvci); |
Harald Welte | 173a182 | 2020-12-03 15:36:59 +0100 | [diff] [blame] | 869 | } else if (TLVP_PRES_LEN(tp, BSSGP_IE_ROUTEING_AREA, 6)) { |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 870 | errctr = GBPROX_GLOB_CTR_INV_RAI; |
Harald Welte | 560bdb3 | 2020-12-04 22:24:47 +0100 | [diff] [blame] | 871 | /* iterate over all bvcs and dispatch the paging to each matching one */ |
Harald Welte | d2fef95 | 2020-12-05 00:31:07 +0100 | [diff] [blame] | 872 | hash_for_each(cfg->bss_nses, i, nse, list) { |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 873 | hash_for_each(nse->bvcs, j, bss_bvc, list) { |
| 874 | if (!memcmp(bss_bvc->ra, TLVP_VAL(tp, BSSGP_IE_ROUTEING_AREA), 6)) { |
| 875 | LOGPNSE(nse, LOGL_INFO, "Rx %s: routing to NSE (RAI match)\n", |
| 876 | pdut_name); |
| 877 | gbprox_relay2peer(msg, bss_bvc, ns_bvci); |
Daniel Willmann | 7620571 | 2020-11-30 17:08:58 +0100 | [diff] [blame] | 878 | n_nses++; |
| 879 | /* Only send it once to each NSE */ |
| 880 | break; |
Daniel Willmann | e50550e | 2020-11-26 18:19:21 +0100 | [diff] [blame] | 881 | } |
Harald Welte | 3d1bd4d | 2020-11-23 15:14:20 +0100 | [diff] [blame] | 882 | } |
| 883 | } |
Harald Welte | 173a182 | 2020-12-03 15:36:59 +0100 | [diff] [blame] | 884 | } else if (TLVP_PRES_LEN(tp, BSSGP_IE_LOCATION_AREA, 5)) { |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 885 | errctr = GBPROX_GLOB_CTR_INV_LAI; |
Harald Welte | 560bdb3 | 2020-12-04 22:24:47 +0100 | [diff] [blame] | 886 | /* iterate over all bvcs and dispatch the paging to each matching one */ |
Harald Welte | d2fef95 | 2020-12-05 00:31:07 +0100 | [diff] [blame] | 887 | hash_for_each(cfg->bss_nses, i, nse, list) { |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 888 | hash_for_each(nse->bvcs, j, bss_bvc, list) { |
| 889 | if (!memcmp(bss_bvc->ra, TLVP_VAL(tp, BSSGP_IE_LOCATION_AREA), 5)) { |
| 890 | LOGPNSE(nse, LOGL_INFO, "Rx %s: routing to NSE (LAI match)\n", |
| 891 | pdut_name); |
| 892 | gbprox_relay2peer(msg, bss_bvc, ns_bvci); |
Daniel Willmann | 7620571 | 2020-11-30 17:08:58 +0100 | [diff] [blame] | 893 | n_nses++; |
| 894 | /* Only send it once to each NSE */ |
| 895 | break; |
Daniel Willmann | e50550e | 2020-11-26 18:19:21 +0100 | [diff] [blame] | 896 | } |
Harald Welte | 3d1bd4d | 2020-11-23 15:14:20 +0100 | [diff] [blame] | 897 | } |
| 898 | } |
Harald Welte | 173a182 | 2020-12-03 15:36:59 +0100 | [diff] [blame] | 899 | } else if (TLVP_PRES_LEN(tp, BSSGP_IE_BSS_AREA_ID, 1)) { |
Harald Welte | 560bdb3 | 2020-12-04 22:24:47 +0100 | [diff] [blame] | 900 | /* iterate over all bvcs and dispatch the paging to each matching one */ |
Harald Welte | d2fef95 | 2020-12-05 00:31:07 +0100 | [diff] [blame] | 901 | hash_for_each(cfg->bss_nses, i, nse, list) { |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 902 | hash_for_each(nse->bvcs, j, bss_bvc, list) { |
| 903 | LOGPNSE(nse, LOGL_INFO, "Rx %s:routing to NSE (broadcast)\n", pdut_name); |
| 904 | gbprox_relay2peer(msg, bss_bvc, ns_bvci); |
Daniel Willmann | 7620571 | 2020-11-30 17:08:58 +0100 | [diff] [blame] | 905 | n_nses++; |
| 906 | /* Only send it once to each NSE */ |
| 907 | break; |
Daniel Willmann | e50550e | 2020-11-26 18:19:21 +0100 | [diff] [blame] | 908 | } |
Harald Welte | 53ee206 | 2020-11-24 11:31:13 +0100 | [diff] [blame] | 909 | } |
| 910 | } else { |
Harald Welte | df690e8 | 2020-12-12 15:58:28 +0100 | [diff] [blame] | 911 | LOGPNSE(sgsn_nse, LOGL_ERROR, "BSSGP PAGING: unable to route, missing IE\n"); |
Harald Welte | 53ee206 | 2020-11-24 11:31:13 +0100 | [diff] [blame] | 912 | rate_ctr_inc(&cfg->ctrg->ctr[errctr]); |
| 913 | } |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 914 | |
Daniel Willmann | 7620571 | 2020-11-30 17:08:58 +0100 | [diff] [blame] | 915 | if (n_nses == 0) { |
Harald Welte | df690e8 | 2020-12-12 15:58:28 +0100 | [diff] [blame] | 916 | LOGPNSE(sgsn_nse, LOGL_ERROR, "BSSGP PAGING: unable to route, no destination found\n"); |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 917 | rate_ctr_inc(&cfg->ctrg->ctr[errctr]); |
| 918 | return -EINVAL; |
| 919 | } |
Harald Welte | 3d1bd4d | 2020-11-23 15:14:20 +0100 | [diff] [blame] | 920 | return 0; |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 921 | } |
| 922 | |
| 923 | /* Receive an incoming BVC-RESET message from the SGSN */ |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 924 | static int rx_bvc_reset_from_sgsn(struct gbproxy_nse *nse, struct msgb *msg, struct tlv_parsed *tp, |
| 925 | uint16_t ns_bvci) |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 926 | { |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 927 | uint16_t ptp_bvci = ntohs(tlvp_val16_unal(tp, BSSGP_IE_BVCI)); |
| 928 | struct gbproxy_bvc *from_bvc; |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 929 | |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 930 | LOGPNSE(nse, LOGL_INFO, "Rx BVC-RESET (BVCI=%05u)\n", ptp_bvci); |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 931 | |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 932 | if (ptp_bvci == 0) { |
| 933 | from_bvc = gbproxy_bvc_by_bvci(nse, 0); |
| 934 | OSMO_ASSERT(from_bvc); |
| 935 | osmo_fsm_inst_dispatch(from_bvc->fi, BSSGP_BVCFSM_E_RX_RESET, msg); |
| 936 | } else { |
| 937 | from_bvc = gbproxy_bvc_by_bvci(nse, ptp_bvci); |
| 938 | if (!from_bvc) { |
| 939 | LOGPNSE(nse, LOGL_ERROR, "Rx BVC-RESET BVCI=%05u: Cannot find BVC\n", ptp_bvci); |
| 940 | rate_ctr_inc(&nse->cfg->ctrg->ctr[GBPROX_GLOB_CTR_INV_BVCI]); |
| 941 | return bssgp_tx_status(BSSGP_CAUSE_UNKNOWN_BVCI, &ptp_bvci, msg); |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 942 | } |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 943 | osmo_fsm_inst_dispatch(from_bvc->fi, BSSGP_BVCFSM_E_RX_RESET, msg); |
Daniel Willmann | e50550e | 2020-11-26 18:19:21 +0100 | [diff] [blame] | 944 | } |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 945 | |
| 946 | return 0; |
| 947 | } |
| 948 | |
| 949 | /* Receive an incoming signalling message from the SGSN-side NS-VC */ |
Harald Welte | dbef0aa | 2020-12-07 17:48:11 +0100 | [diff] [blame] | 950 | static int gbprox_rx_sig_from_sgsn(struct gbproxy_nse *nse, struct msgb *msg, uint16_t ns_bvci) |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 951 | { |
Harald Welte | dbef0aa | 2020-12-07 17:48:11 +0100 | [diff] [blame] | 952 | struct bssgp_normal_hdr *bgph = (struct bssgp_normal_hdr *) msgb_bssgph(msg); |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 953 | uint8_t pdu_type = bgph->pdu_type; |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 954 | const char *pdut_name = osmo_tlv_prot_msg_name(&osmo_pdef_bssgp, bgph->pdu_type); |
| 955 | struct gbproxy_config *cfg = nse->cfg; |
| 956 | struct gbproxy_bvc *sgsn_bvc; |
| 957 | struct tlv_parsed tp; |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 958 | int data_len; |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 959 | uint16_t bvci; |
Harald Welte | ec0f801 | 2020-12-06 16:32:01 +0100 | [diff] [blame] | 960 | char log_pfx[32]; |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 961 | int rc = 0; |
| 962 | int cause; |
Harald Welte | d2fef95 | 2020-12-05 00:31:07 +0100 | [diff] [blame] | 963 | int i; |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 964 | |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 965 | snprintf(log_pfx, sizeof(log_pfx), "NSE(%05u/SGSN)-BVC(%05u/??)", nse->nsei, ns_bvci); |
| 966 | |
| 967 | LOGP(DGPRS, LOGL_DEBUG, "%s Rx %s\n", log_pfx, pdut_name); |
Harald Welte | ec0f801 | 2020-12-06 16:32:01 +0100 | [diff] [blame] | 968 | |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 969 | if (ns_bvci != 0 && ns_bvci != 1) { |
Harald Welte | ec0f801 | 2020-12-06 16:32:01 +0100 | [diff] [blame] | 970 | LOGP(DGPRS, LOGL_NOTICE, "%s BVCI=%05u is not signalling\n", log_pfx, ns_bvci); |
Harald Welte | dbef0aa | 2020-12-07 17:48:11 +0100 | [diff] [blame] | 971 | return bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, msg); |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 972 | } |
| 973 | |
Harald Welte | 278dd27 | 2020-12-06 13:35:24 +0100 | [diff] [blame] | 974 | if (!(bssgp_pdu_type_flags(pdu_type) & BSSGP_PDUF_SIG)) { |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 975 | LOGP(DGPRS, LOGL_NOTICE, "%s %s not allowed in signalling BVC\n", log_pfx, pdut_name); |
Harald Welte | dbef0aa | 2020-12-07 17:48:11 +0100 | [diff] [blame] | 976 | return bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, msg); |
Harald Welte | 278dd27 | 2020-12-06 13:35:24 +0100 | [diff] [blame] | 977 | } |
| 978 | |
| 979 | if (!(bssgp_pdu_type_flags(pdu_type) & BSSGP_PDUF_DL)) { |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 980 | LOGP(DGPRS, LOGL_NOTICE, "%s %s not allowed in downlink direction\n", log_pfx, pdut_name); |
Harald Welte | dbef0aa | 2020-12-07 17:48:11 +0100 | [diff] [blame] | 981 | return bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, msg); |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 982 | } |
| 983 | |
Harald Welte | dbef0aa | 2020-12-07 17:48:11 +0100 | [diff] [blame] | 984 | data_len = msgb_bssgp_len(msg) - sizeof(*bgph); |
Harald Welte | ec0f801 | 2020-12-06 16:32:01 +0100 | [diff] [blame] | 985 | |
| 986 | rc = osmo_tlv_prot_parse(&osmo_pdef_bssgp, &tp, 1, pdu_type, bgph->data, data_len, 0, 0, |
| 987 | DGPRS, log_pfx); |
| 988 | if (rc < 0) { |
| 989 | rc = tx_status_from_tlvp(rc, msg); |
Harald Welte | ec0f801 | 2020-12-06 16:32:01 +0100 | [diff] [blame] | 990 | rate_ctr_inc(&cfg->ctrg->ctr[GBPROX_GLOB_CTR_PROTO_ERR_SGSN]); |
| 991 | return rc; |
| 992 | } |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 993 | /* hack to get both msg + tlv_parsed passed via osmo_fsm_inst_dispatch */ |
| 994 | msgb_bcid(msg) = (void *)&tp; |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 995 | |
| 996 | switch (pdu_type) { |
| 997 | case BSSGP_PDUT_BVC_RESET: |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 998 | /* resolve or create ggbproxy_bvc + handle in BVC-FSM */ |
| 999 | bvci = ntohs(tlvp_val16_unal(&tp, BSSGP_IE_BVCI)); |
| 1000 | rc = rx_bvc_reset_from_sgsn(nse, msg, &tp, ns_bvci); |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 1001 | break; |
| 1002 | case BSSGP_PDUT_BVC_RESET_ACK: |
Daniel Willmann | 8489e7a | 2020-11-03 21:12:42 +0100 | [diff] [blame] | 1003 | bvci = ntohs(tlvp_val16_unal(&tp, BSSGP_IE_BVCI)); |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 1004 | sgsn_bvc = gbproxy_bvc_by_bvci(nse, bvci); |
| 1005 | if (!sgsn_bvc) |
| 1006 | goto err_no_bvc; |
| 1007 | rc = osmo_fsm_inst_dispatch(sgsn_bvc->fi, BSSGP_BVCFSM_E_RX_RESET_ACK, msg); |
| 1008 | break; |
| 1009 | case BSSGP_PDUT_BVC_BLOCK_ACK: |
| 1010 | bvci = ntohs(tlvp_val16_unal(&tp, BSSGP_IE_BVCI)); |
| 1011 | sgsn_bvc = gbproxy_bvc_by_bvci(nse, bvci); |
| 1012 | if (!sgsn_bvc) |
| 1013 | goto err_no_bvc; |
| 1014 | rc = osmo_fsm_inst_dispatch(sgsn_bvc->fi, BSSGP_BVCFSM_E_RX_BLOCK_ACK, msg); |
| 1015 | break; |
| 1016 | case BSSGP_PDUT_BVC_UNBLOCK_ACK: |
| 1017 | bvci = ntohs(tlvp_val16_unal(&tp, BSSGP_IE_BVCI)); |
| 1018 | sgsn_bvc = gbproxy_bvc_by_bvci(nse, bvci); |
| 1019 | if (!sgsn_bvc) |
| 1020 | goto err_no_bvc; |
| 1021 | rc = osmo_fsm_inst_dispatch(sgsn_bvc->fi, BSSGP_BVCFSM_E_RX_UNBLOCK_ACK, msg); |
Daniel Willmann | 8489e7a | 2020-11-03 21:12:42 +0100 | [diff] [blame] | 1022 | break; |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 1023 | case BSSGP_PDUT_FLUSH_LL: |
| 1024 | /* simple case: BVCI IE is mandatory */ |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 1025 | bvci = ntohs(tlvp_val16_unal(&tp, BSSGP_IE_BVCI)); |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 1026 | sgsn_bvc = gbproxy_bvc_by_bvci(nse, bvci); |
| 1027 | if (!sgsn_bvc) |
| 1028 | goto err_no_bvc; |
| 1029 | if (sgsn_bvc->cell && sgsn_bvc->cell->bss_bvc) |
| 1030 | rc = gbprox_relay2peer(msg, sgsn_bvc->cell->bss_bvc, ns_bvci); |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 1031 | break; |
| 1032 | case BSSGP_PDUT_PAGING_PS: |
| 1033 | case BSSGP_PDUT_PAGING_CS: |
| 1034 | /* process the paging request (LAI/RAI lookup) */ |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 1035 | rc = gbprox_rx_paging(nse, msg, pdut_name, &tp, ns_bvci); |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 1036 | break; |
| 1037 | case BSSGP_PDUT_STATUS: |
| 1038 | /* Some exception has occurred */ |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 1039 | cause = *TLVP_VAL(&tp, BSSGP_IE_CAUSE); |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 1040 | LOGPNSE(nse, LOGL_NOTICE, "Rx STATUS cause=0x%02x(%s) ", cause, |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 1041 | bssgp_cause_str(cause)); |
Harald Welte | 173a182 | 2020-12-03 15:36:59 +0100 | [diff] [blame] | 1042 | if (TLVP_PRES_LEN(&tp, BSSGP_IE_BVCI, 2)) { |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 1043 | bvci = ntohs(tlvp_val16_unal(&tp, BSSGP_IE_BVCI)); |
Daniel Willmann | 3696dce | 2020-12-02 16:08:02 +0100 | [diff] [blame] | 1044 | LOGPC(DGPRS, LOGL_NOTICE, "BVCI=%05u\n", bvci); |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 1045 | sgsn_bvc = gbproxy_bvc_by_bvci(nse, bvci); |
| 1046 | /* don't send STATUS in response to STATUS if !bvc */ |
| 1047 | if (sgsn_bvc && sgsn_bvc->cell && sgsn_bvc->cell->bss_bvc) |
| 1048 | rc = gbprox_relay2peer(msg, sgsn_bvc->cell->bss_bvc, ns_bvci); |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 1049 | } else |
| 1050 | LOGPC(DGPRS, LOGL_NOTICE, "\n"); |
| 1051 | break; |
| 1052 | /* those only exist in the SGSN -> BSS direction */ |
| 1053 | case BSSGP_PDUT_SUSPEND_ACK: |
| 1054 | case BSSGP_PDUT_SUSPEND_NACK: |
| 1055 | case BSSGP_PDUT_RESUME_ACK: |
| 1056 | case BSSGP_PDUT_RESUME_NACK: |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 1057 | /* FIXME: handle based on TLLI cache. The RA-ID is not a unique |
| 1058 | * criterion, so we have to rely on the TLLI->BVC state created |
| 1059 | * while processing the SUSPEND/RESUME in uplink */ |
| 1060 | /* FIXME: route to SGSN baed on NRI derived from TLLI */ |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 1061 | break; |
| 1062 | case BSSGP_PDUT_SGSN_INVOKE_TRACE: |
Harald Welte | 7479c4d | 2020-12-02 20:06:04 +0100 | [diff] [blame] | 1063 | case BSSGP_PDUT_OVERLOAD: |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 1064 | LOGPNSE(nse, LOGL_DEBUG, "Rx %s: broadcasting\n", pdut_name); |
Harald Welte | 560bdb3 | 2020-12-04 22:24:47 +0100 | [diff] [blame] | 1065 | /* broadcast to all BSS-side bvcs */ |
Harald Welte | d2fef95 | 2020-12-05 00:31:07 +0100 | [diff] [blame] | 1066 | hash_for_each(cfg->bss_nses, i, nse, list) { |
Harald Welte | 7479c4d | 2020-12-02 20:06:04 +0100 | [diff] [blame] | 1067 | gbprox_relay2nse(msg, nse, 0); |
| 1068 | } |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 1069 | break; |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 1070 | case BSSGP_PDUT_RAN_INFO: |
| 1071 | case BSSGP_PDUT_RAN_INFO_REQ: |
| 1072 | case BSSGP_PDUT_RAN_INFO_ACK: |
| 1073 | case BSSGP_PDUT_RAN_INFO_ERROR: |
| 1074 | case BSSGP_PDUT_RAN_INFO_APP_ERROR: |
| 1075 | /* FIXME: route based in RIM Routing IE */ |
Harald Welte | dbef0aa | 2020-12-07 17:48:11 +0100 | [diff] [blame] | 1076 | rc = bssgp_tx_status(BSSGP_CAUSE_PDU_INCOMP_FEAT, NULL, msg); |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 1077 | break; |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 1078 | default: |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 1079 | LOGPNSE(nse, LOGL_NOTICE, "Rx %s: Not supported\n", pdut_name); |
| 1080 | rate_ctr_inc(&cfg->ctrg->ctr[GBPROX_GLOB_CTR_PROTO_ERR_SGSN]); |
Harald Welte | dbef0aa | 2020-12-07 17:48:11 +0100 | [diff] [blame] | 1081 | rc = bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, msg); |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 1082 | break; |
| 1083 | } |
| 1084 | |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 1085 | return rc; |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 1086 | |
Harald Welte | 560bdb3 | 2020-12-04 22:24:47 +0100 | [diff] [blame] | 1087 | err_no_bvc: |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 1088 | LOGPNSE(nse, LOGL_ERROR, "Rx %s: Cannot find BVC\n", pdut_name); |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 1089 | rate_ctr_inc(&cfg->ctrg-> ctr[GBPROX_GLOB_CTR_INV_RAI]); |
Harald Welte | dbef0aa | 2020-12-07 17:48:11 +0100 | [diff] [blame] | 1090 | return bssgp_tx_status(BSSGP_CAUSE_INV_MAND_INF, NULL, msg); |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 1091 | } |
| 1092 | |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 1093 | |
| 1094 | /*********************************************************************** |
| 1095 | * libosmogb NS/BSSGP integration |
| 1096 | ***********************************************************************/ |
| 1097 | |
Alexander Couzens | 951e133 | 2020-09-22 13:21:46 +0200 | [diff] [blame] | 1098 | int gbprox_bssgp_send_cb(void *ctx, struct msgb *msg) |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 1099 | { |
| 1100 | int rc; |
Alexander Couzens | 951e133 | 2020-09-22 13:21:46 +0200 | [diff] [blame] | 1101 | struct gbproxy_config *cfg = (struct gbproxy_config *) ctx; |
| 1102 | struct gprs_ns2_inst *nsi = cfg->nsi; |
| 1103 | struct osmo_gprs_ns2_prim nsp = {}; |
| 1104 | |
| 1105 | nsp.bvci = msgb_bvci(msg); |
| 1106 | nsp.nsei = msgb_nsei(msg); |
| 1107 | |
| 1108 | osmo_prim_init(&nsp.oph, SAP_NS, PRIM_NS_UNIT_DATA, PRIM_OP_REQUEST, msg); |
| 1109 | rc = gprs_ns2_recv_prim(nsi, &nsp.oph); |
| 1110 | |
| 1111 | return rc; |
| 1112 | } |
| 1113 | |
| 1114 | /* Main input function for Gb proxy */ |
| 1115 | int gbprox_rcvmsg(void *ctx, struct msgb *msg) |
| 1116 | { |
Alexander Couzens | 951e133 | 2020-09-22 13:21:46 +0200 | [diff] [blame] | 1117 | struct gbproxy_config *cfg = (struct gbproxy_config *) ctx; |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 1118 | uint16_t ns_bvci = msgb_bvci(msg); |
| 1119 | uint16_t nsei = msgb_nsei(msg); |
| 1120 | struct gbproxy_nse *nse; |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 1121 | |
Harald Welte | 278dd27 | 2020-12-06 13:35:24 +0100 | [diff] [blame] | 1122 | /* ensure minimum length to decode PCU type */ |
| 1123 | if (msgb_bssgp_len(msg) < sizeof(struct bssgp_normal_hdr)) |
| 1124 | return bssgp_tx_status(BSSGP_CAUSE_SEM_INCORR_PDU, NULL, msg); |
| 1125 | |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 1126 | nse = gbproxy_nse_by_nsei(cfg, nsei, NSE_F_SGSN); |
| 1127 | if (nse) { |
| 1128 | if (ns_bvci == 0 || ns_bvci == 1) |
| 1129 | return gbprox_rx_sig_from_sgsn(nse, msg, ns_bvci); |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 1130 | else |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 1131 | return gbprox_rx_ptp_from_sgsn(nse, msg, ns_bvci); |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 1132 | } |
| 1133 | |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 1134 | nse = gbproxy_nse_by_nsei(cfg, nsei, NSE_F_BSS); |
| 1135 | if (!nse) { |
| 1136 | LOGP(DGPRS, LOGL_NOTICE, "NSE(%05u/BSS) not known -> allocating\n", nsei); |
| 1137 | nse = gbproxy_nse_alloc(cfg, nsei, false); |
| 1138 | } |
| 1139 | if (nse) { |
| 1140 | if (ns_bvci == 0 || ns_bvci == 1) |
| 1141 | return gbprox_rx_sig_from_bss(nse, msg, ns_bvci); |
| 1142 | else |
| 1143 | return gbprox_rx_ptp_from_bss(nse, msg, ns_bvci); |
| 1144 | } |
| 1145 | |
| 1146 | return 0; |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 1147 | } |
| 1148 | |
Alexander Couzens | 951e133 | 2020-09-22 13:21:46 +0200 | [diff] [blame] | 1149 | /* TODO: What about handling: |
| 1150 | * NS_AFF_CAUSE_VC_FAILURE, |
| 1151 | NS_AFF_CAUSE_VC_RECOVERY, |
| 1152 | NS_AFF_CAUSE_FAILURE, |
| 1153 | NS_AFF_CAUSE_RECOVERY, |
| 1154 | osmocom own causes |
| 1155 | NS_AFF_CAUSE_SNS_CONFIGURED, |
| 1156 | NS_AFF_CAUSE_SNS_FAILURE, |
| 1157 | */ |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 1158 | |
Alexander Couzens | 951e133 | 2020-09-22 13:21:46 +0200 | [diff] [blame] | 1159 | void gprs_ns_prim_status_cb(struct gbproxy_config *cfg, struct osmo_gprs_ns2_prim *nsp) |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 1160 | { |
Harald Welte | 560bdb3 | 2020-12-04 22:24:47 +0100 | [diff] [blame] | 1161 | /* TODO: bss nsei available/unavailable bssgp_tx_simple_bvci(BSSGP_PDUT_BVC_BLOCK, nsvc->nsei, bvc->bvci, 0); |
Alexander Couzens | 951e133 | 2020-09-22 13:21:46 +0200 | [diff] [blame] | 1162 | * TODO: sgsn nsei available/unavailable |
| 1163 | */ |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 1164 | |
Harald Welte | 560bdb3 | 2020-12-04 22:24:47 +0100 | [diff] [blame] | 1165 | struct gbproxy_bvc *bvc; |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 1166 | struct gbproxy_nse *sgsn_nse; |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 1167 | |
Alexander Couzens | 951e133 | 2020-09-22 13:21:46 +0200 | [diff] [blame] | 1168 | switch (nsp->u.status.cause) { |
| 1169 | case NS_AFF_CAUSE_SNS_FAILURE: |
| 1170 | case NS_AFF_CAUSE_SNS_CONFIGURED: |
| 1171 | break; |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 1172 | |
Alexander Couzens | 951e133 | 2020-09-22 13:21:46 +0200 | [diff] [blame] | 1173 | case NS_AFF_CAUSE_RECOVERY: |
| 1174 | LOGP(DPCU, LOGL_NOTICE, "NS-NSE %d became available\n", nsp->nsei); |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 1175 | sgsn_nse = gbproxy_nse_by_nsei(cfg, nsp->nsei, NSE_F_SGSN); |
| 1176 | if (sgsn_nse) { |
| 1177 | uint8_t cause = BSSGP_CAUSE_OML_INTERV; |
| 1178 | bvc = gbproxy_bvc_by_bvci(sgsn_nse, 0); |
| 1179 | if (bvc) |
| 1180 | osmo_fsm_inst_dispatch(bvc->fi, BSSGP_BVCFSM_E_REQ_RESET, &cause); |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 1181 | } |
Alexander Couzens | 951e133 | 2020-09-22 13:21:46 +0200 | [diff] [blame] | 1182 | break; |
| 1183 | case NS_AFF_CAUSE_FAILURE: |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 1184 | #if 0 |
Harald Welte | a0f7073 | 2020-12-05 17:50:23 +0100 | [diff] [blame] | 1185 | if (gbproxy_is_sgsn_nsei(cfg, nsp->nsei)) { |
Alexander Couzens | 951e133 | 2020-09-22 13:21:46 +0200 | [diff] [blame] | 1186 | /* sgsn */ |
| 1187 | /* TODO: BSVC: block all PtP towards bss */ |
| 1188 | rate_ctr_inc(&cfg->ctrg-> |
| 1189 | ctr[GBPROX_GLOB_CTR_RESTART_RESET_SGSN]); |
| 1190 | } else { |
Daniel Willmann | e50550e | 2020-11-26 18:19:21 +0100 | [diff] [blame] | 1191 | /* bss became unavailable |
| 1192 | * TODO: Block all BVC belonging to that NSE */ |
Harald Welte | 560bdb3 | 2020-12-04 22:24:47 +0100 | [diff] [blame] | 1193 | bvc = gbproxy_bvc_by_nsei(cfg, nsp->nsei); |
| 1194 | if (!bvc) { |
Alexander Couzens | 951e133 | 2020-09-22 13:21:46 +0200 | [diff] [blame] | 1195 | /* TODO: use primitive name + status cause name */ |
Harald Welte | 560bdb3 | 2020-12-04 22:24:47 +0100 | [diff] [blame] | 1196 | LOGP(DGPRS, LOGL_NOTICE, "Received ns2 primitive %d for unknown bvc NSEI=%u\n", |
Alexander Couzens | 951e133 | 2020-09-22 13:21:46 +0200 | [diff] [blame] | 1197 | nsp->u.status.cause, nsp->nsei); |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 1198 | break; |
| 1199 | } |
Alexander Couzens | 951e133 | 2020-09-22 13:21:46 +0200 | [diff] [blame] | 1200 | |
Harald Welte | 560bdb3 | 2020-12-04 22:24:47 +0100 | [diff] [blame] | 1201 | if (!bvc->blocked) |
Alexander Couzens | 951e133 | 2020-09-22 13:21:46 +0200 | [diff] [blame] | 1202 | break; |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 1203 | hash_for_each(cfg->sgsn_nses, _sgsn, sgsn_nse, list) { |
| 1204 | bssgp_tx_simple_bvci(BSSGP_PDUT_BVC_BLOCK, sgsn_nse->nsei, bvc->bvci, 0); |
| 1205 | } |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 1206 | } |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 1207 | #endif |
Alexander Couzens | 951e133 | 2020-09-22 13:21:46 +0200 | [diff] [blame] | 1208 | LOGP(DPCU, LOGL_NOTICE, "NS-NSE %d became unavailable\n", nsp->nsei); |
| 1209 | break; |
| 1210 | default: |
Harald Welte | 95cf9fb | 2020-11-30 10:55:22 +0100 | [diff] [blame] | 1211 | LOGP(DPCU, LOGL_NOTICE, "NS: Unknown NS-STATUS.ind cause=%s from NS\n", |
| 1212 | gprs_ns2_aff_cause_prim_str(nsp->u.status.cause)); |
Alexander Couzens | 951e133 | 2020-09-22 13:21:46 +0200 | [diff] [blame] | 1213 | break; |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 1214 | } |
Alexander Couzens | 951e133 | 2020-09-22 13:21:46 +0200 | [diff] [blame] | 1215 | } |
| 1216 | |
Alexander Couzens | 951e133 | 2020-09-22 13:21:46 +0200 | [diff] [blame] | 1217 | /* called by the ns layer */ |
| 1218 | int gprs_ns2_prim_cb(struct osmo_prim_hdr *oph, void *ctx) |
| 1219 | { |
| 1220 | struct osmo_gprs_ns2_prim *nsp; |
| 1221 | struct gbproxy_config *cfg = (struct gbproxy_config *) ctx; |
Daniel Willmann | 8f407b1 | 2020-12-02 19:33:50 +0100 | [diff] [blame] | 1222 | uintptr_t bvci; |
Alexander Couzens | 951e133 | 2020-09-22 13:21:46 +0200 | [diff] [blame] | 1223 | int rc = 0; |
| 1224 | |
| 1225 | if (oph->sap != SAP_NS) |
| 1226 | return 0; |
| 1227 | |
| 1228 | nsp = container_of(oph, struct osmo_gprs_ns2_prim, oph); |
| 1229 | |
| 1230 | if (oph->operation != PRIM_OP_INDICATION) { |
Harald Welte | 95cf9fb | 2020-11-30 10:55:22 +0100 | [diff] [blame] | 1231 | LOGP(DPCU, LOGL_NOTICE, "NS: Unexpected primitive operation %s from NS\n", |
| 1232 | get_value_string(osmo_prim_op_names, oph->operation)); |
Alexander Couzens | 951e133 | 2020-09-22 13:21:46 +0200 | [diff] [blame] | 1233 | return 0; |
| 1234 | } |
| 1235 | |
| 1236 | switch (oph->primitive) { |
| 1237 | case PRIM_NS_UNIT_DATA: |
Daniel Willmann | 8f407b1 | 2020-12-02 19:33:50 +0100 | [diff] [blame] | 1238 | |
Alexander Couzens | 951e133 | 2020-09-22 13:21:46 +0200 | [diff] [blame] | 1239 | /* hand the message into the BSSGP implementation */ |
| 1240 | msgb_bssgph(oph->msg) = oph->msg->l3h; |
| 1241 | msgb_bvci(oph->msg) = nsp->bvci; |
| 1242 | msgb_nsei(oph->msg) = nsp->nsei; |
Daniel Willmann | 8f407b1 | 2020-12-02 19:33:50 +0100 | [diff] [blame] | 1243 | bvci = nsp->bvci | BVC_LOG_CTX_FLAG; |
Alexander Couzens | 951e133 | 2020-09-22 13:21:46 +0200 | [diff] [blame] | 1244 | |
Daniel Willmann | 8f407b1 | 2020-12-02 19:33:50 +0100 | [diff] [blame] | 1245 | log_set_context(LOG_CTX_GB_BVC, (void *)bvci); |
Alexander Couzens | 951e133 | 2020-09-22 13:21:46 +0200 | [diff] [blame] | 1246 | rc = gbprox_rcvmsg(cfg, oph->msg); |
Daniel Willmann | b655010 | 2020-11-04 17:32:56 +0100 | [diff] [blame] | 1247 | msgb_free(oph->msg); |
Alexander Couzens | 951e133 | 2020-09-22 13:21:46 +0200 | [diff] [blame] | 1248 | break; |
| 1249 | case PRIM_NS_STATUS: |
| 1250 | gprs_ns_prim_status_cb(cfg, nsp); |
| 1251 | break; |
| 1252 | default: |
Harald Welte | 95cf9fb | 2020-11-30 10:55:22 +0100 | [diff] [blame] | 1253 | LOGP(DPCU, LOGL_NOTICE, "NS: Unknown prim %s %s from NS\n", |
| 1254 | gprs_ns2_prim_str(oph->primitive), |
| 1255 | get_value_string(osmo_prim_op_names, oph->operation)); |
Alexander Couzens | 951e133 | 2020-09-22 13:21:46 +0200 | [diff] [blame] | 1256 | break; |
| 1257 | } |
| 1258 | |
| 1259 | return rc; |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 1260 | } |
| 1261 | |
| 1262 | void gbprox_reset(struct gbproxy_config *cfg) |
| 1263 | { |
Harald Welte | d2fef95 | 2020-12-05 00:31:07 +0100 | [diff] [blame] | 1264 | struct gbproxy_nse *nse; |
| 1265 | struct hlist_node *ntmp; |
Harald Welte | 8b4c794 | 2020-12-05 10:14:49 +0100 | [diff] [blame] | 1266 | int i, j; |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 1267 | |
Harald Welte | d2fef95 | 2020-12-05 00:31:07 +0100 | [diff] [blame] | 1268 | hash_for_each_safe(cfg->bss_nses, i, ntmp, nse, list) { |
Harald Welte | 8b4c794 | 2020-12-05 10:14:49 +0100 | [diff] [blame] | 1269 | struct gbproxy_bvc *bvc; |
| 1270 | struct hlist_node *tmp; |
| 1271 | hash_for_each_safe(nse->bvcs, j, tmp, bvc, list) |
Harald Welte | 560bdb3 | 2020-12-04 22:24:47 +0100 | [diff] [blame] | 1272 | gbproxy_bvc_free(bvc); |
Daniel Willmann | e50550e | 2020-11-26 18:19:21 +0100 | [diff] [blame] | 1273 | |
| 1274 | gbproxy_nse_free(nse); |
| 1275 | } |
Harald Welte | e520964 | 2020-12-05 19:59:45 +0100 | [diff] [blame] | 1276 | /* FIXME: cells */ |
| 1277 | /* FIXME: SGSN side BVCs (except signaling) */ |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 1278 | |
| 1279 | rate_ctr_group_free(cfg->ctrg); |
| 1280 | gbproxy_init_config(cfg); |
| 1281 | } |
| 1282 | |
| 1283 | int gbproxy_init_config(struct gbproxy_config *cfg) |
| 1284 | { |
| 1285 | struct timespec tp; |
| 1286 | |
Harald Welte | 209dc9f | 2020-12-12 19:02:16 +0100 | [diff] [blame] | 1287 | /* by default we advertise 100% of the BSS-side capacity to _each_ SGSN */ |
| 1288 | cfg->pool.bvc_fc_ratio = 100; |
Harald Welte | d2fef95 | 2020-12-05 00:31:07 +0100 | [diff] [blame] | 1289 | hash_init(cfg->bss_nses); |
Daniel Willmann | 1e7be5d | 2020-12-21 18:08:21 +0100 | [diff] [blame] | 1290 | hash_init(cfg->sgsn_nses); |
| 1291 | hash_init(cfg->cells); |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 1292 | cfg->ctrg = rate_ctr_group_alloc(tall_sgsn_ctx, &global_ctrg_desc, 0); |
| 1293 | if (!cfg->ctrg) { |
| 1294 | LOGP(DGPRS, LOGL_ERROR, "Cannot allocate global counter group!\n"); |
| 1295 | return -1; |
| 1296 | } |
| 1297 | osmo_clock_gettime(CLOCK_REALTIME, &tp); |
Harald Welte | c169de4 | 2020-12-07 13:12:13 +0100 | [diff] [blame] | 1298 | osmo_fsm_log_timeouts(true); |
Pau Espin Pedrol | 1ddefb1 | 2019-08-30 19:48:34 +0200 | [diff] [blame] | 1299 | |
| 1300 | return 0; |
| 1301 | } |