Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 1 | /*! \file gprs_ns2.c |
| 2 | * GPRS Networks Service (NS) messages on the Gb interface. |
| 3 | * 3GPP TS 08.16 version 8.0.1 Release 1999 / ETSI TS 101 299 V8.0.1 (2002-05) |
| 4 | * as well as its successor 3GPP TS 48.016 */ |
| 5 | |
| 6 | /* (C) 2009-2018 by Harald Welte <laforge@gnumonks.org> |
| 7 | * (C) 2016-2017,2020 sysmocom - s.f.m.c. GmbH |
| 8 | * Author: Alexander Couzens <lynxis@fe80.eu> |
| 9 | * |
| 10 | * |
| 11 | * All Rights Reserved |
| 12 | * |
| 13 | * SPDX-License-Identifier: GPL-2.0+ |
| 14 | * |
| 15 | * This program is free software; you can redistribute it and/or modify |
| 16 | * it under the terms of the GNU General Public License as published by |
| 17 | * the Free Software Foundation; either version 2 of the License, or |
| 18 | * (at your option) any later version. |
| 19 | * |
| 20 | * This program is distributed in the hope that it will be useful, |
| 21 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 22 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 23 | * GNU General Public License for more details. |
| 24 | * |
| 25 | * You should have received a copy of the GNU General Public License |
| 26 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 27 | * |
| 28 | */ |
| 29 | |
| 30 | /*! \addtogroup libgb |
| 31 | * @{ |
| 32 | * |
| 33 | * GPRS Networks Service (NS) messages on the Gb interface |
| 34 | * 3GPP TS 08.16 version 8.0.1 Release 1999 / ETSI TS 101 299 V8.0.1 (2002-05) |
| 35 | * |
| 36 | * Some introduction into NS: NS is used typically on top of frame relay, |
| 37 | * but in the ip.access world it is encapsulated in UDP packets. It serves |
| 38 | * as an intermediate shim betwen BSSGP and the underlying medium. It doesn't |
| 39 | * do much, apart from providing congestion notification and status indication. |
| 40 | * |
| 41 | * Terms: |
| 42 | * |
| 43 | * NS Network Service |
| 44 | * NSVC NS Virtual Connection |
| 45 | * NSEI NS Entity Identifier |
| 46 | * NSVL NS Virtual Link |
| 47 | * NSVLI NS Virtual Link Identifier |
| 48 | * BVC BSSGP Virtual Connection |
| 49 | * BVCI BSSGP Virtual Connection Identifier |
| 50 | * NSVCG NS Virtual Connection Goup |
| 51 | * Blocked NS-VC cannot be used for user traffic |
| 52 | * Alive Ability of a NS-VC to provide communication |
| 53 | * |
| 54 | * There can be multiple BSSGP virtual connections over one (group of) NSVC's. BSSGP will |
| 55 | * therefore identify the BSSGP virtual connection by a BVCI passed down to NS. |
| 56 | * NS then has to figure out which NSVC's are responsible for this BVCI. |
| 57 | * Those mappings are administratively configured. |
| 58 | * |
| 59 | * This implementation has the following limitations: |
| 60 | * - Only one NS-VC for each NSE: No load-sharing function |
| 61 | * - NSVCI 65535 and 65534 are reserved for internal use |
| 62 | * - Only UDP is supported as of now, no frame relay support |
| 63 | * - There are no BLOCK and UNBLOCK timers (yet?) |
| 64 | * |
| 65 | * \file gprs_ns2.c */ |
| 66 | |
| 67 | #include <stdlib.h> |
| 68 | #include <unistd.h> |
| 69 | #include <errno.h> |
| 70 | #include <stdint.h> |
| 71 | |
| 72 | #include <sys/types.h> |
| 73 | #include <sys/socket.h> |
| 74 | #include <arpa/inet.h> |
| 75 | |
| 76 | #include <osmocom/core/fsm.h> |
| 77 | #include <osmocom/core/msgb.h> |
| 78 | #include <osmocom/core/rate_ctr.h> |
| 79 | #include <osmocom/core/socket.h> |
| 80 | #include <osmocom/core/sockaddr_str.h> |
| 81 | #include <osmocom/core/stats.h> |
| 82 | #include <osmocom/core/stat_item.h> |
| 83 | #include <osmocom/core/talloc.h> |
| 84 | #include <osmocom/gprs/gprs_msgb.h> |
| 85 | #include <osmocom/gsm/prim.h> |
| 86 | #include <osmocom/gsm/tlv.h> |
| 87 | |
| 88 | #include "gprs_ns2_internal.h" |
| 89 | |
| 90 | #define ns_set_state(ns_, st_) ns_set_state_with_log(ns_, st_, false, __FILE__, __LINE__) |
| 91 | #define ns_set_remote_state(ns_, st_) ns_set_state_with_log(ns_, st_, true, __FILE__, __LINE__) |
| 92 | #define ns_mark_blocked(ns_) ns_set_state(ns_, (ns_)->state | NSE_S_BLOCKED) |
| 93 | #define ns_mark_unblocked(ns_) ns_set_state(ns_, (ns_)->state & (~NSE_S_BLOCKED)); |
| 94 | #define ns_mark_alive(ns_) ns_set_state(ns_, (ns_)->state | NSE_S_ALIVE) |
| 95 | #define ns_mark_dead(ns_) ns_set_state(ns_, (ns_)->state & (~NSE_S_ALIVE)); |
| 96 | |
| 97 | /* HACK: The NS_IE_IP_ADDR does not follow any known TLV rules. |
| 98 | * Since it's a hard ABI break to implement 16 bit tag with fixed length entries to workaround it, |
| 99 | * the parser will be called with ns_att_tlvdef1 and if it's failed with ns_att_tlvdef2. |
| 100 | * The TLV parser depends on 8bit tag in many places. |
| 101 | * The NS_IE_IP_ADDR is only valid for SNS_ACK SNS_ADD and SNS_DELETE. |
| 102 | */ |
| 103 | static const struct tlv_definition ns_att_tlvdef1 = { |
| 104 | .def = { |
| 105 | [NS_IE_CAUSE] = { TLV_TYPE_TvLV, 0 }, |
| 106 | [NS_IE_VCI] = { TLV_TYPE_TvLV, 0 }, |
| 107 | [NS_IE_PDU] = { TLV_TYPE_TvLV, 0 }, |
| 108 | [NS_IE_BVCI] = { TLV_TYPE_TvLV, 0 }, |
| 109 | [NS_IE_NSEI] = { TLV_TYPE_TvLV, 0 }, |
| 110 | [NS_IE_IPv4_LIST] = { TLV_TYPE_TvLV, 0 }, |
| 111 | [NS_IE_IPv6_LIST] = { TLV_TYPE_TvLV, 0 }, |
| 112 | [NS_IE_MAX_NR_NSVC] = { TLV_TYPE_FIXED, 2 }, |
| 113 | [NS_IE_IPv4_EP_NR] = { TLV_TYPE_FIXED, 2 }, |
| 114 | [NS_IE_IPv6_EP_NR] = { TLV_TYPE_FIXED, 2 }, |
| 115 | [NS_IE_RESET_FLAG] = { TLV_TYPE_TV, 0 }, |
| 116 | /* NS_IE_IP_ADDR in the IPv4 version */ |
| 117 | [NS_IE_IP_ADDR] = { TLV_TYPE_FIXED, 5 }, |
| 118 | }, |
| 119 | }; |
| 120 | |
| 121 | static const struct tlv_definition ns_att_tlvdef2 = { |
| 122 | .def = { |
| 123 | [NS_IE_CAUSE] = { TLV_TYPE_TvLV, 0 }, |
| 124 | [NS_IE_VCI] = { TLV_TYPE_TvLV, 0 }, |
| 125 | [NS_IE_PDU] = { TLV_TYPE_TvLV, 0 }, |
| 126 | [NS_IE_BVCI] = { TLV_TYPE_TvLV, 0 }, |
| 127 | [NS_IE_NSEI] = { TLV_TYPE_TvLV, 0 }, |
| 128 | [NS_IE_IPv4_LIST] = { TLV_TYPE_TvLV, 0 }, |
| 129 | [NS_IE_IPv6_LIST] = { TLV_TYPE_TvLV, 0 }, |
| 130 | [NS_IE_MAX_NR_NSVC] = { TLV_TYPE_FIXED, 2 }, |
| 131 | [NS_IE_IPv4_EP_NR] = { TLV_TYPE_FIXED, 2 }, |
| 132 | [NS_IE_IPv6_EP_NR] = { TLV_TYPE_FIXED, 2 }, |
| 133 | [NS_IE_RESET_FLAG] = { TLV_TYPE_TV, 0 }, |
| 134 | /* NS_IE_IP_ADDR in the IPv6 version */ |
| 135 | [NS_IE_IP_ADDR] = { TLV_TYPE_FIXED, 17 }, |
| 136 | }, |
| 137 | }; |
| 138 | |
| 139 | |
| 140 | /* Section 10.3.2, Table 13 */ |
Alexander Couzens | b3b837c | 2020-10-27 15:12:25 +0100 | [diff] [blame] | 141 | const struct value_string gprs_ns2_cause_strs[] = { |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 142 | { NS_CAUSE_TRANSIT_FAIL, "Transit network failure" }, |
| 143 | { NS_CAUSE_OM_INTERVENTION, "O&M intervention" }, |
| 144 | { NS_CAUSE_EQUIP_FAIL, "Equipment failure" }, |
| 145 | { NS_CAUSE_NSVC_BLOCKED, "NS-VC blocked" }, |
| 146 | { NS_CAUSE_NSVC_UNKNOWN, "NS-VC unknown" }, |
| 147 | { NS_CAUSE_BVCI_UNKNOWN, "BVCI unknown" }, |
| 148 | { NS_CAUSE_SEM_INCORR_PDU, "Semantically incorrect PDU" }, |
| 149 | { NS_CAUSE_PDU_INCOMP_PSTATE, "PDU not compatible with protocol state" }, |
| 150 | { NS_CAUSE_PROTO_ERR_UNSPEC, "Protocol error, unspecified" }, |
| 151 | { NS_CAUSE_INVAL_ESSENT_IE, "Invalid essential IE" }, |
| 152 | { NS_CAUSE_MISSING_ESSENT_IE, "Missing essential IE" }, |
| 153 | { NS_CAUSE_INVAL_NR_IPv4_EP, "Invalid Number of IPv4 Endpoints" }, |
| 154 | { NS_CAUSE_INVAL_NR_IPv6_EP, "Invalid Number of IPv6 Endpoints" }, |
| 155 | { NS_CAUSE_INVAL_NR_NS_VC, "Invalid Number of NS-VCs" }, |
| 156 | { NS_CAUSE_INVAL_WEIGH, "Invalid Weights" }, |
| 157 | { NS_CAUSE_UNKN_IP_EP, "Unknown IP Endpoint" }, |
| 158 | { NS_CAUSE_UNKN_IP_ADDR, "Unknown IP Address" }, |
| 159 | { NS_CAUSE_UNKN_IP_TEST_FAILED, "IP Test Failed" }, |
| 160 | { 0, NULL } |
| 161 | }; |
| 162 | |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 163 | static const struct rate_ctr_desc nsvc_ctr_description[] = { |
| 164 | { "packets:in", "Packets at NS Level ( In)" }, |
| 165 | { "packets:out","Packets at NS Level (Out)" }, |
| 166 | { "bytes:in", "Bytes at NS Level ( In)" }, |
| 167 | { "bytes:out", "Bytes at NS Level (Out)" }, |
| 168 | { "blocked", "NS-VC Block count " }, |
| 169 | { "dead", "NS-VC gone dead count " }, |
| 170 | { "replaced", "NS-VC replaced other count" }, |
| 171 | { "nsei-chg", "NS-VC changed NSEI count " }, |
| 172 | { "inv-nsvci", "NS-VCI was invalid count " }, |
| 173 | { "inv-nsei", "NSEI was invalid count " }, |
| 174 | { "lost:alive", "ALIVE ACK missing count " }, |
| 175 | { "lost:reset", "RESET ACK missing count " }, |
| 176 | }; |
| 177 | |
| 178 | static const struct rate_ctr_group_desc nsvc_ctrg_desc = { |
| 179 | .group_name_prefix = "ns:nsvc", |
| 180 | .group_description = "NSVC Peer Statistics", |
| 181 | .num_ctr = ARRAY_SIZE(nsvc_ctr_description), |
| 182 | .ctr_desc = nsvc_ctr_description, |
| 183 | .class_id = OSMO_STATS_CLASS_PEER, |
| 184 | }; |
| 185 | |
| 186 | |
| 187 | static const struct osmo_stat_item_desc nsvc_stat_description[] = { |
| 188 | { "alive.delay", "ALIVE response time ", "ms", 16, 0 }, |
| 189 | }; |
| 190 | |
| 191 | static const struct osmo_stat_item_group_desc nsvc_statg_desc = { |
| 192 | .group_name_prefix = "ns.nsvc", |
| 193 | .group_description = "NSVC Peer Statistics", |
| 194 | .num_items = ARRAY_SIZE(nsvc_stat_description), |
| 195 | .item_desc = nsvc_stat_description, |
| 196 | .class_id = OSMO_STATS_CLASS_PEER, |
| 197 | }; |
| 198 | |
Alexander Couzens | 2498f1d | 2020-10-27 01:09:01 +0100 | [diff] [blame] | 199 | const struct value_string gprs_ns2_aff_cause_prim_strs[] = { |
| 200 | { NS_AFF_CAUSE_VC_FAILURE, "NSVC failure" }, |
| 201 | { NS_AFF_CAUSE_VC_RECOVERY, "NSVC recovery" }, |
| 202 | { NS_AFF_CAUSE_FAILURE, "NSE failure" }, |
| 203 | { NS_AFF_CAUSE_RECOVERY, "NSE recovery" }, |
| 204 | { NS_AFF_CAUSE_SNS_CONFIGURED, "NSE SNS configured" }, |
| 205 | { NS_AFF_CAUSE_SNS_FAILURE, "NSE SNS failure" }, |
| 206 | { 0, NULL } |
| 207 | }; |
| 208 | |
| 209 | const struct value_string ns2_prim_str[] = { |
| 210 | { PRIM_NS_UNIT_DATA, "UNIT DATA" }, |
| 211 | { PRIM_NS_CONGESTION, "CONGESTION" }, |
| 212 | { PRIM_NS_STATUS, "STATUS" }, |
| 213 | { 0, NULL } |
| 214 | }; |
| 215 | |
Harald Welte | 5bef2cc | 2020-09-18 22:33:24 +0200 | [diff] [blame] | 216 | /*! string-format a given NS-VC into a user-supplied buffer. |
| 217 | * \param[in] buf user-allocated output buffer |
| 218 | * \param[in] buf_len size of user-allocated output buffer in bytes |
| 219 | * \param[in] nsvc NS-VC to be string-formatted |
| 220 | * \return pointer to buf on success; NULL on error */ |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 221 | char *gprs_ns2_ll_str_buf(char *buf, size_t buf_len, struct gprs_ns2_vc *nsvc) |
| 222 | { |
Alexander Couzens | 9a4cf27 | 2020-10-11 20:48:04 +0200 | [diff] [blame] | 223 | const struct osmo_sockaddr *local; |
| 224 | const struct osmo_sockaddr *remote; |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 225 | struct osmo_sockaddr_str local_str; |
| 226 | struct osmo_sockaddr_str remote_str; |
| 227 | |
| 228 | if (!buf_len) |
Harald Welte | 92ad029 | 2020-09-18 22:34:24 +0200 | [diff] [blame] | 229 | return NULL; |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 230 | |
| 231 | switch (nsvc->ll) { |
| 232 | case GPRS_NS_LL_UDP: |
| 233 | if (!gprs_ns2_is_ip_bind(nsvc->bind)) { |
| 234 | buf[0] = '\0'; |
| 235 | return buf; |
| 236 | } |
| 237 | |
| 238 | local = gprs_ns2_ip_bind_sockaddr(nsvc->bind); |
Alexander Couzens | c4229a4 | 2020-10-11 20:58:04 +0200 | [diff] [blame] | 239 | remote = gprs_ns2_ip_vc_remote(nsvc); |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 240 | if (osmo_sockaddr_str_from_sockaddr(&local_str, &local->u.sas)) |
| 241 | strcpy(local_str.ip, "invalid"); |
| 242 | if (osmo_sockaddr_str_from_sockaddr(&remote_str, &remote->u.sas)) |
| 243 | strcpy(remote_str.ip, "invalid"); |
| 244 | |
| 245 | if (nsvc->nsvci_is_valid) |
| 246 | snprintf(buf, buf_len, "udp)[%s]:%u<%u>[%s]:%u", |
| 247 | local_str.ip, local_str.port, |
| 248 | nsvc->nsvci, |
| 249 | remote_str.ip, remote_str.port); |
| 250 | else |
| 251 | snprintf(buf, buf_len, "udp)[%s]:%u<>[%s]:%u", |
| 252 | local_str.ip, local_str.port, |
| 253 | remote_str.ip, remote_str.port); |
| 254 | break; |
| 255 | case GPRS_NS_LL_FR_GRE: |
| 256 | snprintf(buf, buf_len, "frgre)"); |
| 257 | break; |
| 258 | case GPRS_NS_LL_E1: |
| 259 | snprintf(buf, buf_len, "e1)"); |
| 260 | break; |
| 261 | default: |
| 262 | buf[0] = '\0'; |
| 263 | break; |
| 264 | } |
| 265 | |
| 266 | buf[buf_len - 1] = '\0'; |
| 267 | |
| 268 | return buf; |
| 269 | } |
| 270 | |
| 271 | /* udp is the longest: udp)[IP6]:65536<65536>[IP6]:65536 */ |
| 272 | #define NS2_LL_MAX_STR 4+2*(INET6_ADDRSTRLEN+9)+8 |
| 273 | |
Harald Welte | 5bef2cc | 2020-09-18 22:33:24 +0200 | [diff] [blame] | 274 | /*! string-format a given NS-VC to a thread-local static buffer. |
| 275 | * \param[in] nsvc NS-VC to be string-formatted |
| 276 | * \return pointer to the string on success; NULL on error */ |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 277 | const char *gprs_ns2_ll_str(struct gprs_ns2_vc *nsvc) |
| 278 | { |
| 279 | static __thread char buf[NS2_LL_MAX_STR]; |
| 280 | return gprs_ns2_ll_str_buf(buf, sizeof(buf), nsvc); |
| 281 | } |
| 282 | |
Harald Welte | 5bef2cc | 2020-09-18 22:33:24 +0200 | [diff] [blame] | 283 | /*! string-format a given NS-VC to a dynamically allocated string. |
| 284 | * \param[in] ctx talloc context from which to allocate |
| 285 | * \param[in] nsvc NS-VC to be string-formatted |
| 286 | * \return pointer to the string on success; NULL on error */ |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 287 | char *gprs_ns2_ll_str_c(const void *ctx, struct gprs_ns2_vc *nsvc) |
| 288 | { |
| 289 | char *buf = talloc_size(ctx, NS2_LL_MAX_STR); |
| 290 | if (!buf) |
| 291 | return buf; |
| 292 | return gprs_ns2_ll_str_buf(buf, NS2_LL_MAX_STR, nsvc); |
| 293 | } |
| 294 | |
Daniel Willmann | f128654 | 2020-11-03 23:03:33 +0100 | [diff] [blame^] | 295 | /*! Return the current state name of a given NS-VC to a thread-local static buffer. |
| 296 | * \param[in] nsvc NS-VC to return the state of |
| 297 | * \return pointer to the string on success; NULL on error */ |
| 298 | const char *gprs_ns2_nsvc_state_name(struct gprs_ns2_vc *nsvc) |
| 299 | { |
| 300 | return osmo_fsm_inst_state_name(nsvc->fi); |
| 301 | } |
| 302 | |
Harald Welte | 5bef2cc | 2020-09-18 22:33:24 +0200 | [diff] [blame] | 303 | /*! Receive a primitive from the NS User (Gb). |
| 304 | * \param[in] nsi NS instance to which the primitive is issued |
| 305 | * \param[in] oph The primitive |
| 306 | * \return 0 on success; negative on error */ |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 307 | int gprs_ns2_recv_prim(struct gprs_ns2_inst *nsi, struct osmo_prim_hdr *oph) |
| 308 | { |
| 309 | /* TODO: implement load distribution function */ |
| 310 | /* TODO: implement resource distribution */ |
| 311 | /* TODO: check for empty PDUs which can be sent to Request/Confirm |
| 312 | * the IP endpoint */ |
| 313 | struct osmo_gprs_ns2_prim *nsp; |
| 314 | struct gprs_ns2_nse *nse = NULL; |
| 315 | struct gprs_ns2_vc *nsvc = NULL, *tmp; |
| 316 | uint16_t bvci, nsei; |
| 317 | uint8_t sducontrol = 0; |
| 318 | |
| 319 | if (oph->sap != SAP_NS) |
| 320 | return -EINVAL; |
| 321 | |
| 322 | nsp = container_of(oph, struct osmo_gprs_ns2_prim, oph); |
| 323 | |
| 324 | if (oph->operation != PRIM_OP_REQUEST || oph->primitive != PRIM_NS_UNIT_DATA) |
| 325 | return -EINVAL; |
| 326 | |
| 327 | if (!oph->msg) |
| 328 | return -EINVAL; |
| 329 | |
| 330 | bvci = nsp->bvci; |
| 331 | nsei = nsp->nsei; |
| 332 | |
| 333 | nse = gprs_ns2_nse_by_nsei(nsi, nsei); |
| 334 | if (!nse) |
| 335 | return -EINVAL; |
| 336 | |
| 337 | llist_for_each_entry(tmp, &nse->nsvc, list) { |
| 338 | if (!gprs_ns2_vc_is_unblocked(tmp)) |
| 339 | continue; |
| 340 | if (bvci == 0 && tmp->sig_weight == 0) |
| 341 | continue; |
| 342 | if (bvci != 0 && tmp->data_weight == 0) |
| 343 | continue; |
| 344 | |
| 345 | nsvc = tmp; |
| 346 | } |
| 347 | |
| 348 | /* TODO: send a status primitive back */ |
| 349 | if (!nsvc) |
| 350 | return 0; |
| 351 | |
| 352 | if (nsp->u.unitdata.change == NS_ENDPOINT_REQUEST_CHANGE) |
| 353 | sducontrol = 1; |
| 354 | else if (nsp->u.unitdata.change == NS_ENDPOINT_CONFIRM_CHANGE) |
| 355 | sducontrol = 2; |
| 356 | |
| 357 | return ns2_tx_unit_data(nsvc, bvci, sducontrol, oph->msg); |
| 358 | } |
| 359 | |
Harald Welte | 5bef2cc | 2020-09-18 22:33:24 +0200 | [diff] [blame] | 360 | /*! Send a STATUS.ind primitive to the specified NS instance user. |
| 361 | * \param[in] nsi NS instance on which we operate |
| 362 | * \param[in] nsei NSEI to which the statue relates |
| 363 | * \param[in] bvci BVCI to which the status relates |
| 364 | * \param[in] cause The cause of the status */ |
Alexander Couzens | bf95f0f | 2020-10-01 22:56:03 +0200 | [diff] [blame] | 365 | void ns2_prim_status_ind(struct gprs_ns2_nse *nse, |
| 366 | uint16_t bvci, |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 367 | enum gprs_ns2_affecting_cause cause) |
| 368 | { |
| 369 | struct osmo_gprs_ns2_prim nsp = {}; |
Alexander Couzens | bf95f0f | 2020-10-01 22:56:03 +0200 | [diff] [blame] | 370 | nsp.nsei = nse->nsei; |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 371 | nsp.bvci = bvci; |
| 372 | nsp.u.status.cause = cause; |
| 373 | nsp.u.status.transfer = -1; |
Alexander Couzens | da0a285 | 2020-10-01 23:24:07 +0200 | [diff] [blame] | 374 | nsp.u.status.first = nse->first; |
| 375 | nsp.u.status.persistent = nse->persistent; |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 376 | osmo_prim_init(&nsp.oph, SAP_NS, PRIM_NS_STATUS, |
| 377 | PRIM_OP_INDICATION, NULL); |
Alexander Couzens | bf95f0f | 2020-10-01 22:56:03 +0200 | [diff] [blame] | 378 | nse->nsi->cb(&nsp.oph, nse->nsi->cb_data); |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 379 | } |
| 380 | |
Harald Welte | 5bef2cc | 2020-09-18 22:33:24 +0200 | [diff] [blame] | 381 | /*! Allocate a NS-VC within the given bind + NSE. |
| 382 | * \param[in] bind The 'bind' on which we operate |
| 383 | * \param[in] nse The NS Entity on which we operate |
| 384 | * \param[in] initiater - if this is an incoming remote (!initiater) or a local outgoing connection (initater) |
| 385 | * \return newly allocated NS-VC on success; NULL on error */ |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 386 | struct gprs_ns2_vc *ns2_vc_alloc(struct gprs_ns2_vc_bind *bind, struct gprs_ns2_nse *nse, bool initiater) |
| 387 | { |
| 388 | struct gprs_ns2_vc *nsvc = talloc_zero(bind, struct gprs_ns2_vc); |
| 389 | |
| 390 | if (!nsvc) |
| 391 | return NULL; |
| 392 | |
| 393 | nsvc->bind = bind; |
| 394 | nsvc->nse = nse; |
| 395 | nsvc->mode = bind->vc_mode; |
| 396 | nsvc->sig_weight = 1; |
| 397 | nsvc->data_weight = 1; |
| 398 | |
| 399 | nsvc->ctrg = rate_ctr_group_alloc(nsvc, &nsvc_ctrg_desc, bind->nsi->rate_ctr_idx); |
| 400 | if (!nsvc->ctrg) { |
| 401 | goto err; |
| 402 | } |
| 403 | nsvc->statg = osmo_stat_item_group_alloc(nsvc, &nsvc_statg_desc, bind->nsi->rate_ctr_idx); |
| 404 | if (!nsvc->statg) |
| 405 | goto err_group; |
| 406 | if (!gprs_ns2_vc_fsm_alloc(nsvc, NULL, initiater)) |
| 407 | goto err_statg; |
| 408 | |
| 409 | bind->nsi->rate_ctr_idx++; |
| 410 | |
| 411 | llist_add(&nsvc->list, &nse->nsvc); |
| 412 | llist_add(&nsvc->blist, &bind->nsvc); |
| 413 | |
| 414 | return nsvc; |
| 415 | |
| 416 | err_statg: |
| 417 | osmo_stat_item_group_free(nsvc->statg); |
| 418 | err_group: |
| 419 | rate_ctr_group_free(nsvc->ctrg); |
| 420 | err: |
| 421 | talloc_free(nsvc); |
| 422 | |
| 423 | return NULL; |
| 424 | } |
| 425 | |
Harald Welte | 5bef2cc | 2020-09-18 22:33:24 +0200 | [diff] [blame] | 426 | /*! Destroy/release given NS-VC. |
| 427 | * \param[in] nsvc NS-VC to destroy */ |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 428 | void gprs_ns2_free_nsvc(struct gprs_ns2_vc *nsvc) |
| 429 | { |
| 430 | if (!nsvc) |
| 431 | return; |
| 432 | |
Alexander Couzens | bf95f0f | 2020-10-01 22:56:03 +0200 | [diff] [blame] | 433 | ns2_prim_status_ind(nsvc->nse, 0, NS_AFF_CAUSE_VC_FAILURE); |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 434 | |
| 435 | llist_del(&nsvc->list); |
| 436 | llist_del(&nsvc->blist); |
| 437 | |
| 438 | /* notify nse this nsvc is unavailable */ |
| 439 | ns2_nse_notify_unblocked(nsvc, false); |
| 440 | |
| 441 | /* check if sns is using this VC */ |
| 442 | ns2_sns_free_nsvc(nsvc); |
| 443 | osmo_fsm_inst_term(nsvc->fi, OSMO_FSM_TERM_REQUEST, NULL); |
| 444 | |
| 445 | /* let the driver/bind clean up it's internal state */ |
| 446 | if (nsvc->priv && nsvc->bind->free_vc) |
| 447 | nsvc->bind->free_vc(nsvc); |
| 448 | |
| 449 | osmo_stat_item_group_free(nsvc->statg); |
| 450 | rate_ctr_group_free(nsvc->ctrg); |
| 451 | |
| 452 | talloc_free(nsvc); |
| 453 | } |
| 454 | |
Harald Welte | 5bef2cc | 2020-09-18 22:33:24 +0200 | [diff] [blame] | 455 | /*! Allocate a message buffer for use with the NS2 stack. */ |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 456 | struct msgb *gprs_ns2_msgb_alloc(void) |
| 457 | { |
| 458 | struct msgb *msg = msgb_alloc_headroom(NS_ALLOC_SIZE, NS_ALLOC_HEADROOM, |
| 459 | "GPRS/NS"); |
| 460 | if (!msg) { |
| 461 | LOGP(DLNS, LOGL_ERROR, "Failed to allocate NS message of size %d\n", |
| 462 | NS_ALLOC_SIZE); |
| 463 | } |
| 464 | return msg; |
| 465 | } |
| 466 | |
Harald Welte | 5bef2cc | 2020-09-18 22:33:24 +0200 | [diff] [blame] | 467 | /*! Create a status message to be sent over a new connection. |
| 468 | * \param[in] orig_msg the original message |
| 469 | * \param[in] tp TLVP parsed of the original message |
| 470 | * \param[out] reject callee-allocated message buffer of the generated NS-STATUS |
| 471 | * \param[in] cause Cause for the rejection |
| 472 | * \return 0 on success */ |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 473 | static int reject_status_msg(struct msgb *orig_msg, struct tlv_parsed *tp, struct msgb **reject, enum ns_cause cause) |
| 474 | { |
| 475 | struct msgb *msg = gprs_ns2_msgb_alloc(); |
| 476 | struct gprs_ns_hdr *nsh; |
| 477 | bool have_vci = false; |
| 478 | uint8_t _cause = cause; |
| 479 | uint16_t nsei = 0; |
| 480 | |
| 481 | if (!msg) |
| 482 | return -ENOMEM; |
| 483 | |
| 484 | if (TLVP_PRESENT(tp, NS_IE_NSEI)) { |
| 485 | nsei = tlvp_val16be(tp, NS_IE_NSEI); |
| 486 | |
| 487 | LOGP(DLNS, LOGL_NOTICE, "NSEI=%u Rejecting message without NSVCI. Tx NS STATUS (cause=%s)\n", |
| 488 | nsei, gprs_ns2_cause_str(cause)); |
| 489 | } |
| 490 | |
| 491 | msg->l2h = msgb_put(msg, sizeof(*nsh)); |
| 492 | nsh = (struct gprs_ns_hdr *) msg->l2h; |
| 493 | nsh->pdu_type = NS_PDUT_STATUS; |
| 494 | |
| 495 | msgb_tvlv_put(msg, NS_IE_CAUSE, 1, &_cause); |
| 496 | have_vci = TLVP_PRESENT(tp, NS_IE_VCI); |
| 497 | |
| 498 | /* Section 9.2.7.1: Static conditions for NS-VCI */ |
| 499 | if (cause == NS_CAUSE_NSVC_BLOCKED || |
| 500 | cause == NS_CAUSE_NSVC_UNKNOWN) { |
| 501 | if (!have_vci) { |
| 502 | msgb_free(msg); |
| 503 | return -EINVAL; |
| 504 | } |
| 505 | |
| 506 | msgb_tvlv_put(msg, NS_IE_VCI, 2, TLVP_VAL(tp, NS_IE_VCI)); |
| 507 | } |
| 508 | |
| 509 | /* Section 9.2.7.2: Static conditions for NS PDU */ |
| 510 | switch (cause) { |
| 511 | case NS_CAUSE_SEM_INCORR_PDU: |
| 512 | case NS_CAUSE_PDU_INCOMP_PSTATE: |
| 513 | case NS_CAUSE_PROTO_ERR_UNSPEC: |
| 514 | case NS_CAUSE_INVAL_ESSENT_IE: |
| 515 | case NS_CAUSE_MISSING_ESSENT_IE: |
| 516 | msgb_tvlv_put(msg, NS_IE_PDU, msgb_l2len(orig_msg), |
| 517 | orig_msg->l2h); |
| 518 | break; |
| 519 | default: |
| 520 | break; |
| 521 | } |
| 522 | |
| 523 | *reject = msg; |
| 524 | return 0; |
| 525 | } |
| 526 | |
Harald Welte | 5bef2cc | 2020-09-18 22:33:24 +0200 | [diff] [blame] | 527 | /*! Resolve a NS Entity based on its NSEI. |
| 528 | * \param[in] nsi NS Instance in which we do the look-up |
| 529 | * \param[in] nsei NSEI to look up |
| 530 | * \return NS Entity in successful case; NULL if none found */ |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 531 | struct gprs_ns2_nse *gprs_ns2_nse_by_nsei(struct gprs_ns2_inst *nsi, uint16_t nsei) |
| 532 | { |
| 533 | struct gprs_ns2_nse *nse; |
| 534 | |
| 535 | llist_for_each_entry(nse, &nsi->nse, list) { |
| 536 | if (nse->nsei == nsei) |
| 537 | return nse; |
| 538 | } |
| 539 | |
| 540 | return NULL; |
| 541 | } |
| 542 | |
Harald Welte | 5bef2cc | 2020-09-18 22:33:24 +0200 | [diff] [blame] | 543 | /*! Resolve a NS-VC Entity based on its NS-VCI. |
| 544 | * \param[in] nsi NS Instance in which we do the look-up |
| 545 | * \param[in] nsvci NS-VCI to look up |
| 546 | * \return NS-VC Entity in successful case; NULL if none found */ |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 547 | struct gprs_ns2_vc *gprs_ns2_nsvc_by_nsvci(struct gprs_ns2_inst *nsi, uint16_t nsvci) |
| 548 | { |
| 549 | struct gprs_ns2_nse *nse; |
| 550 | struct gprs_ns2_vc *nsvc; |
| 551 | |
| 552 | llist_for_each_entry(nse, &nsi->nse, list) { |
| 553 | llist_for_each_entry(nsvc, &nse->nsvc, list) { |
| 554 | if (nsvc->nsvci_is_valid && nsvc->nsvci == nsvci) |
| 555 | return nsvc; |
| 556 | } |
| 557 | } |
| 558 | |
| 559 | return NULL; |
| 560 | } |
| 561 | |
Harald Welte | 5bef2cc | 2020-09-18 22:33:24 +0200 | [diff] [blame] | 562 | /*! Create a NS Entity within given NS instance. |
| 563 | * \param[in] nsi NS instance in which to create NS Entity |
| 564 | * \param[in] nsei NS Entity Identifier of to-be-created NSE |
| 565 | * \returns newly-allocated NS-E in successful case; NULL on error */ |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 566 | struct gprs_ns2_nse *gprs_ns2_create_nse(struct gprs_ns2_inst *nsi, uint16_t nsei) |
| 567 | { |
| 568 | struct gprs_ns2_nse *nse; |
| 569 | |
| 570 | nse = gprs_ns2_nse_by_nsei(nsi, nsei); |
| 571 | if (nse) { |
| 572 | LOGP(DLNS, LOGL_ERROR, "NSEI:%u Can not create a NSE with already taken NSEI\n", nsei); |
| 573 | return nse; |
| 574 | } |
| 575 | |
| 576 | nse = talloc_zero(nsi, struct gprs_ns2_nse); |
| 577 | if (!nse) |
| 578 | return NULL; |
| 579 | |
| 580 | nse->nsei = nsei; |
| 581 | nse->nsi = nsi; |
Alexander Couzens | da0a285 | 2020-10-01 23:24:07 +0200 | [diff] [blame] | 582 | nse->first = true; |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 583 | llist_add(&nse->list, &nsi->nse); |
| 584 | INIT_LLIST_HEAD(&nse->nsvc); |
| 585 | |
| 586 | return nse; |
| 587 | } |
| 588 | |
Alexander Couzens | 05e7f7d | 2020-10-11 19:51:46 +0200 | [diff] [blame] | 589 | /*! Return the NSEI |
| 590 | * \param[in] nse NS Entity |
| 591 | * \return the nsei. |
| 592 | */ |
| 593 | uint16_t gprs_ns2_nse_nsei(struct gprs_ns2_nse *nse) |
| 594 | { |
| 595 | return nse->nsei; |
| 596 | } |
| 597 | |
Harald Welte | 5bef2cc | 2020-09-18 22:33:24 +0200 | [diff] [blame] | 598 | /*! Destroy given NS Entity. |
| 599 | * \param[in] nse NS Entity to destroy */ |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 600 | void gprs_ns2_free_nse(struct gprs_ns2_nse *nse) |
| 601 | { |
| 602 | struct gprs_ns2_vc *nsvc, *tmp; |
| 603 | |
| 604 | if (!nse) |
| 605 | return; |
| 606 | |
| 607 | llist_for_each_entry_safe(nsvc, tmp, &nse->nsvc, list) { |
| 608 | gprs_ns2_free_nsvc(nsvc); |
| 609 | } |
| 610 | |
Alexander Couzens | bf95f0f | 2020-10-01 22:56:03 +0200 | [diff] [blame] | 611 | ns2_prim_status_ind(nse, 0, NS_AFF_CAUSE_FAILURE); |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 612 | |
| 613 | llist_del(&nse->list); |
| 614 | if (nse->bss_sns_fi) |
| 615 | osmo_fsm_inst_term(nse->bss_sns_fi, OSMO_FSM_TERM_REQUEST, NULL); |
| 616 | talloc_free(nse); |
| 617 | } |
| 618 | |
Alexander Couzens | 4b6c8af | 2020-10-11 20:15:25 +0200 | [diff] [blame] | 619 | void gprs_ns2_free_nses(struct gprs_ns2_inst *nsi) |
| 620 | { |
| 621 | struct gprs_ns2_nse *nse, *ntmp; |
| 622 | |
| 623 | llist_for_each_entry_safe(nse, ntmp, &nsi->nse, list) { |
| 624 | gprs_ns2_free_nse(nse); |
| 625 | } |
| 626 | } |
| 627 | |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 628 | static inline int ns2_tlv_parse(struct tlv_parsed *dec, |
| 629 | const uint8_t *buf, int buf_len, uint8_t lv_tag, |
| 630 | uint8_t lv_tag2) |
| 631 | { |
| 632 | /* workaround for NS_IE_IP_ADDR not following any known TLV rules. |
| 633 | * See comment of ns_att_tlvdef1. */ |
| 634 | int rc = tlv_parse(dec, &ns_att_tlvdef1, buf, buf_len, lv_tag, lv_tag2); |
| 635 | if (rc < 0) |
| 636 | return tlv_parse(dec, &ns_att_tlvdef2, buf, buf_len, lv_tag, lv_tag2); |
| 637 | return rc; |
| 638 | } |
| 639 | |
| 640 | |
Harald Welte | 5bef2cc | 2020-09-18 22:33:24 +0200 | [diff] [blame] | 641 | /*! Create a new NS-VC based on a [received] message. Depending on the bind it might create a NSE. |
| 642 | * \param[in] bind the bind through which msg was received |
| 643 | * \param[in] msg the actual received message |
| 644 | * \param[in] logname A name to describe the VC. E.g. ip address pair |
| 645 | * \param[out] reject A message filled to be sent back. Only used in failure cases. |
| 646 | * \param[out] success A pointer which will be set to the new VC on success |
| 647 | * \return enum value indicating the status, e.g. GPRS_NS2_CS_CREATED */ |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 648 | enum gprs_ns2_cs ns2_create_vc(struct gprs_ns2_vc_bind *bind, |
| 649 | struct msgb *msg, |
| 650 | const char *logname, |
| 651 | struct msgb **reject, |
| 652 | struct gprs_ns2_vc **success) |
| 653 | { |
| 654 | struct gprs_ns_hdr *nsh = (struct gprs_ns_hdr *)msg->l2h; |
| 655 | struct tlv_parsed tp; |
| 656 | struct gprs_ns2_vc *nsvc; |
| 657 | struct gprs_ns2_nse *nse; |
| 658 | uint16_t nsvci; |
| 659 | uint16_t nsei; |
| 660 | |
| 661 | int rc; |
| 662 | |
| 663 | if (msg->len < sizeof(struct gprs_ns_hdr)) |
| 664 | return GPRS_NS2_CS_ERROR; |
| 665 | |
| 666 | if (nsh->pdu_type == NS_PDUT_STATUS) { |
| 667 | /* Do not respond, see 3GPP TS 08.16, 7.5.1 */ |
| 668 | LOGP(DLNS, LOGL_INFO, "Ignoring NS STATUS from %s " |
| 669 | "for non-existing NS-VC\n", |
| 670 | logname); |
| 671 | return GPRS_NS2_CS_SKIPPED; |
| 672 | } |
| 673 | |
| 674 | if (nsh->pdu_type == NS_PDUT_ALIVE_ACK) { |
| 675 | /* Ignore this, see 3GPP TS 08.16, 7.4.1 */ |
| 676 | LOGP(DLNS, LOGL_INFO, "Ignoring NS ALIVE ACK from %s " |
| 677 | "for non-existing NS-VC\n", |
| 678 | logname); |
| 679 | return GPRS_NS2_CS_SKIPPED; |
| 680 | } |
| 681 | |
| 682 | if (nsh->pdu_type == NS_PDUT_RESET_ACK) { |
| 683 | /* Ignore this, see 3GPP TS 08.16, 7.3.1 */ |
| 684 | LOGP(DLNS, LOGL_INFO, "Ignoring NS RESET ACK from %s " |
| 685 | "for non-existing NS-VC\n", |
| 686 | logname); |
| 687 | return GPRS_NS2_CS_SKIPPED; |
| 688 | } |
| 689 | |
Alexander Couzens | 48f6386 | 2020-09-12 02:19:19 +0200 | [diff] [blame] | 690 | if (bind->vc_mode == NS2_VC_MODE_BLOCKRESET) { |
| 691 | /* Only the RESET procedure creates a new NSVC */ |
| 692 | if (nsh->pdu_type != NS_PDUT_RESET) { |
| 693 | rc = reject_status_msg(msg, &tp, reject, NS_CAUSE_PDU_INCOMP_PSTATE); |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 694 | |
Alexander Couzens | 48f6386 | 2020-09-12 02:19:19 +0200 | [diff] [blame] | 695 | if (rc < 0) { |
| 696 | LOGP(DLNS, LOGL_ERROR, "Failed to generate reject message (%d)\n", rc); |
| 697 | return rc; |
| 698 | } |
| 699 | return GPRS_NS2_CS_REJECTED; |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 700 | } |
Alexander Couzens | 48f6386 | 2020-09-12 02:19:19 +0200 | [diff] [blame] | 701 | } else { /* NS2_VC_MODE_ALIVE */ |
Alexander Couzens | 8ebc1ac | 2020-10-12 03:57:26 +0200 | [diff] [blame] | 702 | rc = reject_status_msg(msg, &tp, reject, NS_CAUSE_PDU_INCOMP_PSTATE); |
Alexander Couzens | 48f6386 | 2020-09-12 02:19:19 +0200 | [diff] [blame] | 703 | |
Alexander Couzens | 8ebc1ac | 2020-10-12 03:57:26 +0200 | [diff] [blame] | 704 | if (rc < 0) { |
| 705 | LOGP(DLNS, LOGL_ERROR, "Failed to generate reject message (%d)\n", rc); |
| 706 | return rc; |
Alexander Couzens | 48f6386 | 2020-09-12 02:19:19 +0200 | [diff] [blame] | 707 | } |
Alexander Couzens | 8ebc1ac | 2020-10-12 03:57:26 +0200 | [diff] [blame] | 708 | return GPRS_NS2_CS_REJECTED; |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 709 | } |
| 710 | |
| 711 | rc = ns2_tlv_parse(&tp, nsh->data, |
| 712 | msgb_l2len(msg) - sizeof(*nsh), 0, 0); |
| 713 | if (rc < 0) { |
| 714 | LOGP(DLNS, LOGL_ERROR, "Rx NS RESET Error %d during " |
| 715 | "TLV Parse\n", rc); |
| 716 | /* TODO: send invalid message back */ |
| 717 | return GPRS_NS2_CS_REJECTED; |
| 718 | } |
| 719 | |
Alexander Couzens | 8ebc1ac | 2020-10-12 03:57:26 +0200 | [diff] [blame] | 720 | if (!TLVP_PRESENT(&tp, NS_IE_CAUSE) || |
| 721 | !TLVP_PRESENT(&tp, NS_IE_VCI) || !TLVP_PRESENT(&tp, NS_IE_NSEI)) { |
| 722 | LOGP(DLNS, LOGL_ERROR, "NS RESET Missing mandatory IE\n"); |
| 723 | rc = reject_status_msg(msg, &tp, reject, NS_CAUSE_MISSING_ESSENT_IE); |
| 724 | return GPRS_NS2_CS_REJECTED; |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 725 | } |
| 726 | |
| 727 | /* find or create NSE */ |
| 728 | nsei = tlvp_val16be(&tp, NS_IE_NSEI); |
| 729 | nse = gprs_ns2_nse_by_nsei(bind->nsi, nsei); |
| 730 | if (!nse) { |
| 731 | if (!bind->nsi->create_nse) { |
| 732 | return GPRS_NS2_CS_SKIPPED; |
| 733 | } |
| 734 | |
| 735 | nse = gprs_ns2_create_nse(bind->nsi, nsei); |
| 736 | if (!nse) { |
| 737 | return GPRS_NS2_CS_ERROR; |
| 738 | } |
| 739 | } |
| 740 | |
| 741 | nsvc = ns2_vc_alloc(bind, nse, false); |
| 742 | if (!nsvc) |
| 743 | return GPRS_NS2_CS_SKIPPED; |
| 744 | |
| 745 | nsvc->ll = GPRS_NS_LL_UDP; |
| 746 | |
| 747 | nsvci = tlvp_val16be(&tp, NS_IE_VCI); |
| 748 | nsvc->nsvci = nsvci; |
| 749 | nsvc->nsvci_is_valid = true; |
| 750 | |
| 751 | *success = nsvc; |
| 752 | |
| 753 | return GPRS_NS2_CS_CREATED; |
| 754 | } |
| 755 | |
Harald Welte | 5bef2cc | 2020-09-18 22:33:24 +0200 | [diff] [blame] | 756 | /*! Create, and connect an inactive, new IP-based NS-VC |
| 757 | * \param[in] bind bind in which the new NS-VC is to be created |
| 758 | * \param[in] remote remote address to which to connect |
| 759 | * \param[in] nse NS Entity in which the NS-VC is to be created |
| 760 | * \param[in] nsvci is only required when bind->vc_mode == NS2_VC_MODE_BLOCKRESET |
| 761 | * \return pointer to newly-allocated, connected and inactive NS-VC; NULL on error */ |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 762 | struct gprs_ns2_vc *gprs_ns2_ip_connect_inactive(struct gprs_ns2_vc_bind *bind, |
Vadim Yanitskiy | a07f25e | 2020-10-09 21:47:01 +0700 | [diff] [blame] | 763 | const struct osmo_sockaddr *remote, |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 764 | struct gprs_ns2_nse *nse, |
| 765 | uint16_t nsvci) |
| 766 | { |
| 767 | struct gprs_ns2_vc *nsvc; |
| 768 | |
| 769 | nsvc = gprs_ns2_ip_bind_connect(bind, nse, remote); |
| 770 | if (!nsvc) |
| 771 | return NULL; |
| 772 | |
| 773 | if (nsvc->mode == NS2_VC_MODE_BLOCKRESET) { |
| 774 | nsvc->nsvci = nsvci; |
| 775 | nsvc->nsvci_is_valid = true; |
| 776 | } |
| 777 | |
| 778 | return nsvc; |
| 779 | } |
| 780 | |
Harald Welte | 5bef2cc | 2020-09-18 22:33:24 +0200 | [diff] [blame] | 781 | /*! Create, connect and activate a new IP-based NS-VC |
| 782 | * \param[in] bind bind in which the new NS-VC is to be created |
| 783 | * \param[in] remote remote address to which to connect |
| 784 | * \param[in] nse NS Entity in which the NS-VC is to be created |
| 785 | * \param[in] nsvci is only required when bind->vc_mode == NS2_VC_MODE_BLOCKRESET |
| 786 | * \return pointer to newly-allocated, connected and activated NS-VC; NULL on error */ |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 787 | struct gprs_ns2_vc *gprs_ns2_ip_connect(struct gprs_ns2_vc_bind *bind, |
Vadim Yanitskiy | a07f25e | 2020-10-09 21:47:01 +0700 | [diff] [blame] | 788 | const struct osmo_sockaddr *remote, |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 789 | struct gprs_ns2_nse *nse, |
| 790 | uint16_t nsvci) |
| 791 | { |
| 792 | struct gprs_ns2_vc *nsvc; |
| 793 | nsvc = gprs_ns2_ip_connect_inactive(bind, remote, nse, nsvci); |
| 794 | if (!nsvc) |
| 795 | return NULL; |
| 796 | |
| 797 | gprs_ns2_vc_fsm_start(nsvc); |
| 798 | |
| 799 | return nsvc; |
| 800 | } |
| 801 | |
Harald Welte | 5bef2cc | 2020-09-18 22:33:24 +0200 | [diff] [blame] | 802 | /*! Create, connect and activate a new IP-based NS-VC |
| 803 | * \param[in] bind bind in which the new NS-VC is to be created |
| 804 | * \param[in] remote remote address to which to connect |
| 805 | * \param[in] nsei NSEI of the NS Entity in which the NS-VC is to be created |
| 806 | * \param[in] nsvci is only required when bind->vc_mode == NS2_VC_MODE_BLOCKRESET |
| 807 | * \return pointer to newly-allocated, connected and activated NS-VC; NULL on error */ |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 808 | struct gprs_ns2_vc *gprs_ns2_ip_connect2(struct gprs_ns2_vc_bind *bind, |
Vadim Yanitskiy | a07f25e | 2020-10-09 21:47:01 +0700 | [diff] [blame] | 809 | const struct osmo_sockaddr *remote, |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 810 | uint16_t nsei, |
| 811 | uint16_t nsvci) |
| 812 | { |
| 813 | struct gprs_ns2_nse *nse = gprs_ns2_nse_by_nsei(bind->nsi, nsei); |
| 814 | |
| 815 | if (!nse) { |
| 816 | nse = gprs_ns2_create_nse(bind->nsi, nsei); |
| 817 | if (!nse) |
| 818 | return NULL; |
| 819 | } |
| 820 | |
| 821 | return gprs_ns2_ip_connect(bind, remote, nse, nsvci); |
| 822 | } |
| 823 | |
Harald Welte | 5bef2cc | 2020-09-18 22:33:24 +0200 | [diff] [blame] | 824 | /*! Create, connect and activate a new IP-SNS NSE. |
| 825 | * \param[in] bind bind in which the new NS-VC is to be created |
| 826 | * \param[in] remote remote address to which to connect |
| 827 | * \param[in] nsei NSEI of the NS Entity in which the NS-VC is to be created |
| 828 | * \return 0 on success; negative on error */ |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 829 | int gprs_ns2_ip_connect_sns(struct gprs_ns2_vc_bind *bind, |
Vadim Yanitskiy | a07f25e | 2020-10-09 21:47:01 +0700 | [diff] [blame] | 830 | const struct osmo_sockaddr *remote, |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 831 | uint16_t nsei) |
| 832 | { |
| 833 | struct gprs_ns2_nse *nse = gprs_ns2_nse_by_nsei(bind->nsi, nsei); |
| 834 | struct gprs_ns2_vc *nsvc; |
| 835 | |
| 836 | if (!nse) { |
| 837 | nse = gprs_ns2_create_nse(bind->nsi, nsei); |
| 838 | if (!nse) |
| 839 | return -1; |
| 840 | } |
| 841 | |
| 842 | nsvc = gprs_ns2_ip_bind_connect(bind, nse, remote); |
| 843 | if (!nsvc) |
| 844 | return -1; |
| 845 | |
| 846 | if (!nse->bss_sns_fi) |
| 847 | nse->bss_sns_fi = ns2_sns_bss_fsm_alloc(nse, NULL); |
| 848 | |
| 849 | if (!nse->bss_sns_fi) |
| 850 | return -1; |
| 851 | |
| 852 | return ns2_sns_bss_fsm_start(nse, nsvc, remote); |
| 853 | } |
| 854 | |
Harald Welte | 5bef2cc | 2020-09-18 22:33:24 +0200 | [diff] [blame] | 855 | /*! Find NS-VC for given socket address. |
| 856 | * \param[in] nse NS Entity in which to search |
| 857 | * \param[in] sockaddr socket address to search for |
| 858 | * \return NS-VC matching sockaddr; NULL if none found */ |
Alexander Couzens | 38b19e8 | 2020-09-23 23:56:37 +0200 | [diff] [blame] | 859 | struct gprs_ns2_vc *gprs_ns2_nsvc_by_sockaddr_nse(struct gprs_ns2_nse *nse, |
Vadim Yanitskiy | a07f25e | 2020-10-09 21:47:01 +0700 | [diff] [blame] | 860 | const struct osmo_sockaddr *sockaddr) |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 861 | { |
| 862 | struct gprs_ns2_vc *nsvc; |
Alexander Couzens | 9a4cf27 | 2020-10-11 20:48:04 +0200 | [diff] [blame] | 863 | const struct osmo_sockaddr *remote; |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 864 | |
| 865 | OSMO_ASSERT(nse); |
| 866 | OSMO_ASSERT(sockaddr); |
| 867 | |
| 868 | llist_for_each_entry(nsvc, &nse->nsvc, list) { |
Alexander Couzens | c4229a4 | 2020-10-11 20:58:04 +0200 | [diff] [blame] | 869 | remote = gprs_ns2_ip_vc_remote(nsvc); |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 870 | if (!osmo_sockaddr_cmp(sockaddr, remote)) |
| 871 | return nsvc; |
| 872 | } |
| 873 | |
| 874 | return NULL; |
| 875 | } |
| 876 | |
Alexander Couzens | 6cb5d5f | 2020-10-11 23:23:31 +0200 | [diff] [blame] | 877 | /*! |
| 878 | * Iterate over all nsvc of a NS Entity and call the callback. |
| 879 | * If the callback returns < 0 it aborts the loop and returns the callback return code. |
| 880 | * \param[in] nse NS Entity to iterate over all nsvcs |
| 881 | * \param[in] cb the callback to call |
| 882 | * \param[inout] cb_data the private data of the callback |
| 883 | * \return 0 if the loop completes. If a callback returns < 0 it will returns this value. |
| 884 | */ |
| 885 | int gprs_ns2_nse_foreach_nsvc(struct gprs_ns2_nse *nse, gprs_ns2_foreach_nsvc_cb cb, void *cb_data) |
| 886 | { |
| 887 | struct gprs_ns2_vc *nsvc, *tmp; |
| 888 | int rc = 0; |
| 889 | llist_for_each_entry_safe(nsvc, tmp, &nse->nsvc, list) { |
| 890 | rc = cb(nsvc, cb_data); |
| 891 | if (rc < 0) |
| 892 | return rc; |
| 893 | } |
| 894 | |
| 895 | return 0; |
| 896 | } |
| 897 | |
| 898 | |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 899 | |
Harald Welte | 5bef2cc | 2020-09-18 22:33:24 +0200 | [diff] [blame] | 900 | /*! Bottom-side entry-point for received NS PDU from the driver/bind |
Harald Welte | 5bef2cc | 2020-09-18 22:33:24 +0200 | [diff] [blame] | 901 | * \param[in] nsvc NS-VC for which the message was received |
| 902 | * \param msg the received message. Ownership is trasnferred, caller must not free it! |
| 903 | * \return 0 on success; negative on error */ |
Alexander Couzens | ffd49d0 | 2020-09-24 00:47:17 +0200 | [diff] [blame] | 904 | int ns2_recv_vc(struct gprs_ns2_vc *nsvc, |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 905 | struct msgb *msg) |
| 906 | { |
| 907 | struct gprs_ns_hdr *nsh = (struct gprs_ns_hdr *) msg->l2h; |
| 908 | struct tlv_parsed tp; |
| 909 | int rc = 0; |
| 910 | |
| 911 | if (msg->len < sizeof(struct gprs_ns_hdr)) |
| 912 | return -EINVAL; |
| 913 | |
| 914 | switch (nsh->pdu_type) { |
| 915 | case SNS_PDUT_CONFIG: |
| 916 | /* one additional byte ('end flag') before the TLV part starts */ |
| 917 | rc = ns2_tlv_parse(&tp, nsh->data+1, |
| 918 | msgb_l2len(msg) - sizeof(*nsh)-1, 0, 0); |
| 919 | if (rc < 0) { |
Alexander Couzens | bb0a53b | 2020-10-12 04:18:03 +0200 | [diff] [blame] | 920 | LOGP(DLNS, LOGL_NOTICE, "Error during TLV Parse in %s\n", msgb_hexdump(msg)); |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 921 | return rc; |
| 922 | } |
| 923 | /* All sub-network service related message types */ |
| 924 | rc = gprs_ns2_sns_rx(nsvc, msg, &tp); |
| 925 | break; |
| 926 | case SNS_PDUT_ACK: |
| 927 | case SNS_PDUT_ADD: |
| 928 | case SNS_PDUT_CHANGE_WEIGHT: |
| 929 | case SNS_PDUT_DELETE: |
| 930 | /* weird layout: NSEI TLV, then value-only transaction IE, then TLV again */ |
Harald Welte | 36be9d8 | 2020-10-09 15:39:25 +0200 | [diff] [blame] | 931 | rc = ns2_tlv_parse(&tp, nsh->data+5, |
| 932 | msgb_l2len(msg) - sizeof(*nsh)-5, 0, 0); |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 933 | if (rc < 0) { |
Alexander Couzens | bb0a53b | 2020-10-12 04:18:03 +0200 | [diff] [blame] | 934 | LOGP(DLNS, LOGL_NOTICE, "Error during TLV Parse in %s\n", msgb_hexdump(msg)); |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 935 | return rc; |
| 936 | } |
| 937 | tp.lv[NS_IE_NSEI].val = nsh->data+2; |
| 938 | tp.lv[NS_IE_NSEI].len = 2; |
| 939 | tp.lv[NS_IE_TRANS_ID].val = nsh->data+4; |
| 940 | tp.lv[NS_IE_TRANS_ID].len = 1; |
| 941 | rc = gprs_ns2_sns_rx(nsvc, msg, &tp); |
| 942 | break; |
| 943 | case SNS_PDUT_CONFIG_ACK: |
| 944 | case SNS_PDUT_SIZE: |
| 945 | case SNS_PDUT_SIZE_ACK: |
| 946 | rc = ns2_tlv_parse(&tp, nsh->data, |
| 947 | msgb_l2len(msg) - sizeof(*nsh), 0, 0); |
| 948 | if (rc < 0) { |
Alexander Couzens | bb0a53b | 2020-10-12 04:18:03 +0200 | [diff] [blame] | 949 | LOGP(DLNS, LOGL_NOTICE, "Error during TLV Parse in %s\n", msgb_hexdump(msg)); |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 950 | return rc; |
| 951 | } |
| 952 | /* All sub-network service related message types */ |
| 953 | rc = gprs_ns2_sns_rx(nsvc, msg, &tp); |
| 954 | break; |
| 955 | |
| 956 | case NS_PDUT_UNITDATA: |
| 957 | rc = gprs_ns2_vc_rx(nsvc, msg, NULL); |
| 958 | break; |
| 959 | default: |
| 960 | rc = ns2_tlv_parse(&tp, nsh->data, |
| 961 | msgb_l2len(msg) - sizeof(*nsh), 0, 0); |
| 962 | if (rc < 0) { |
Alexander Couzens | bb0a53b | 2020-10-12 04:18:03 +0200 | [diff] [blame] | 963 | LOGP(DLNS, LOGL_NOTICE, "Error during TLV Parse\n"); |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 964 | if (nsh->pdu_type != NS_PDUT_STATUS) |
| 965 | ns2_tx_status(nsvc, NS_CAUSE_PROTO_ERR_UNSPEC, 0, msg); |
| 966 | return rc; |
| 967 | } |
| 968 | rc = gprs_ns2_vc_rx(nsvc, msg, &tp); |
| 969 | break; |
| 970 | } |
| 971 | |
| 972 | return rc; |
| 973 | } |
| 974 | |
Harald Welte | 5bef2cc | 2020-09-18 22:33:24 +0200 | [diff] [blame] | 975 | /*! Notify a nse about the change of a NS-VC. |
| 976 | * \param[in] nsvc NS-VC which has detected the change (and shall not be notified). |
| 977 | * \param[in] unblocked whether the NSE should be marked as unblocked (true) or blocked (false) */ |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 978 | void ns2_nse_notify_unblocked(struct gprs_ns2_vc *nsvc, bool unblocked) |
| 979 | { |
| 980 | struct gprs_ns2_nse *nse = nsvc->nse; |
| 981 | struct gprs_ns2_vc *tmp; |
| 982 | |
| 983 | if (unblocked == nse->alive) |
| 984 | return; |
| 985 | |
| 986 | if (unblocked) { |
| 987 | /* this is the first unblocked NSVC on an unavailable NSE */ |
| 988 | nse->alive = true; |
Alexander Couzens | bf95f0f | 2020-10-01 22:56:03 +0200 | [diff] [blame] | 989 | ns2_prim_status_ind(nse, 0, NS_AFF_CAUSE_RECOVERY); |
Alexander Couzens | da0a285 | 2020-10-01 23:24:07 +0200 | [diff] [blame] | 990 | nse->first = false; |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 991 | return; |
| 992 | } |
| 993 | |
| 994 | /* check if there are any remaining alive vcs */ |
| 995 | llist_for_each_entry(tmp, &nse->nsvc, list) { |
| 996 | if (tmp == nsvc) |
| 997 | continue; |
| 998 | |
| 999 | if (gprs_ns2_vc_is_unblocked(tmp)) { |
| 1000 | /* there is at least one remaining alive NSVC */ |
| 1001 | return; |
| 1002 | } |
| 1003 | } |
| 1004 | |
| 1005 | /* nse became unavailable */ |
| 1006 | nse->alive = false; |
Alexander Couzens | bf95f0f | 2020-10-01 22:56:03 +0200 | [diff] [blame] | 1007 | ns2_prim_status_ind(nse, 0, NS_AFF_CAUSE_FAILURE); |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 1008 | } |
| 1009 | |
| 1010 | /*! Create a new GPRS NS instance |
Harald Welte | 5bef2cc | 2020-09-18 22:33:24 +0200 | [diff] [blame] | 1011 | * \param[in] ctx a talloc context to allocate NS instance from |
Alexander Couzens | cce8828 | 2020-10-26 00:25:50 +0100 | [diff] [blame] | 1012 | * \param[in] cb Call-back function for dispatching primitives to the user. The Call-back must free all msgb* given in the primitive. |
Harald Welte | 5bef2cc | 2020-09-18 22:33:24 +0200 | [diff] [blame] | 1013 | * \param[in] cb_data transparent user data passed to Call-back |
| 1014 | * \returns dynamically allocated gprs_ns_inst; NULL on error */ |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 1015 | struct gprs_ns2_inst *gprs_ns2_instantiate(void *ctx, osmo_prim_cb cb, void *cb_data) |
| 1016 | { |
| 1017 | struct gprs_ns2_inst *nsi; |
| 1018 | |
| 1019 | nsi = talloc_zero(ctx, struct gprs_ns2_inst); |
| 1020 | if (!nsi) |
| 1021 | return NULL; |
| 1022 | |
| 1023 | nsi->cb = cb; |
| 1024 | nsi->cb_data = cb_data; |
| 1025 | INIT_LLIST_HEAD(&nsi->binding); |
| 1026 | INIT_LLIST_HEAD(&nsi->nse); |
| 1027 | |
| 1028 | nsi->timeout[NS_TOUT_TNS_BLOCK] = 3; |
| 1029 | nsi->timeout[NS_TOUT_TNS_BLOCK_RETRIES] = 3; |
| 1030 | nsi->timeout[NS_TOUT_TNS_RESET] = 3; |
| 1031 | nsi->timeout[NS_TOUT_TNS_RESET_RETRIES] = 3; |
| 1032 | nsi->timeout[NS_TOUT_TNS_TEST] = 30; |
| 1033 | nsi->timeout[NS_TOUT_TNS_ALIVE] = 3; |
| 1034 | nsi->timeout[NS_TOUT_TNS_ALIVE_RETRIES] = 10; |
| 1035 | nsi->timeout[NS_TOUT_TSNS_PROV] = 3; /* 1..10 */ |
| 1036 | |
| 1037 | return nsi; |
| 1038 | } |
| 1039 | |
Harald Welte | 5bef2cc | 2020-09-18 22:33:24 +0200 | [diff] [blame] | 1040 | /*! Destroy a NS Instance (including all its NSEs, binds, ...). |
| 1041 | * \param[in] nsi NS instance to destroy */ |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 1042 | void gprs_ns2_free(struct gprs_ns2_inst *nsi) |
| 1043 | { |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 1044 | if (!nsi) |
| 1045 | return; |
| 1046 | |
Alexander Couzens | 4b6c8af | 2020-10-11 20:15:25 +0200 | [diff] [blame] | 1047 | gprs_ns2_free_nses(nsi); |
Alexander Couzens | 896fcd5 | 2020-10-11 19:52:36 +0200 | [diff] [blame] | 1048 | gprs_ns2_free_binds(nsi); |
Alexander Couzens | 3531504 | 2020-10-10 03:28:17 +0200 | [diff] [blame] | 1049 | |
| 1050 | talloc_free(nsi); |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 1051 | } |
| 1052 | |
Harald Welte | 5bef2cc | 2020-09-18 22:33:24 +0200 | [diff] [blame] | 1053 | /*! Configure whether a NS Instance should dynamically create NSEs based on incoming traffic. |
| 1054 | * \param nsi the instance to modify |
| 1055 | * \param create_nse if NSE can be created on receiving package. SGSN set this. |
| 1056 | * \return 0 on success; negative on error |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 1057 | */ |
| 1058 | int gprs_ns2_dynamic_create_nse(struct gprs_ns2_inst *nsi, bool create_nse) |
| 1059 | { |
| 1060 | nsi->create_nse = create_nse; |
| 1061 | |
| 1062 | return 0; |
| 1063 | } |
| 1064 | |
Harald Welte | 5bef2cc | 2020-09-18 22:33:24 +0200 | [diff] [blame] | 1065 | /*! Start the NS-ALIVE FSM in all NS-VCs of given NSE. |
| 1066 | * \param[in] nse NS Entity in whihc to start NS-ALIVE FSMs */ |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 1067 | void gprs_ns2_start_alive_all_nsvcs(struct gprs_ns2_nse *nse) |
| 1068 | { |
| 1069 | struct gprs_ns2_vc *nsvc; |
| 1070 | OSMO_ASSERT(nse); |
| 1071 | |
| 1072 | llist_for_each_entry(nsvc, &nse->nsvc, list) { |
| 1073 | if (nsvc->sns_only) |
| 1074 | continue; |
| 1075 | |
| 1076 | gprs_ns2_vc_fsm_start(nsvc); |
| 1077 | } |
| 1078 | } |
| 1079 | |
Harald Welte | 5bef2cc | 2020-09-18 22:33:24 +0200 | [diff] [blame] | 1080 | /*! Set the mode of given bind. |
| 1081 | * \param[in] bind the bind we want to set the mode of |
| 1082 | * \param[in] modde mode to set bind to */ |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 1083 | void gprs_ns2_bind_set_mode(struct gprs_ns2_vc_bind *bind, enum gprs_ns2_vc_mode mode) |
| 1084 | { |
| 1085 | bind->vc_mode = mode; |
| 1086 | } |
| 1087 | |
Harald Welte | 5bef2cc | 2020-09-18 22:33:24 +0200 | [diff] [blame] | 1088 | /*! Destroy a given bind. |
| 1089 | * \param[in] bind the bind we want to destroy */ |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 1090 | void gprs_ns2_free_bind(struct gprs_ns2_vc_bind *bind) |
| 1091 | { |
| 1092 | struct gprs_ns2_vc *nsvc, *tmp; |
| 1093 | if (!bind) |
| 1094 | return; |
| 1095 | |
| 1096 | llist_for_each_entry_safe(nsvc, tmp, &bind->nsvc, blist) { |
| 1097 | gprs_ns2_free_nsvc(nsvc); |
| 1098 | } |
| 1099 | |
| 1100 | if (bind->driver->free_bind) |
| 1101 | bind->driver->free_bind(bind); |
| 1102 | |
| 1103 | llist_del(&bind->list); |
| 1104 | talloc_free(bind); |
| 1105 | } |
Alexander Couzens | 896fcd5 | 2020-10-11 19:52:36 +0200 | [diff] [blame] | 1106 | |
| 1107 | void gprs_ns2_free_binds(struct gprs_ns2_inst *nsi) |
| 1108 | { |
| 1109 | struct gprs_ns2_vc_bind *bind, *tbind; |
| 1110 | |
| 1111 | llist_for_each_entry_safe(bind, tbind, &nsi->binding, list) { |
| 1112 | gprs_ns2_free_bind(bind); |
| 1113 | } |
| 1114 | } |
Alexander Couzens | 6a16149 | 2020-07-12 13:45:50 +0200 | [diff] [blame] | 1115 | /*! @} */ |