Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1 | /* GPRS SGSN integration with libgtp of OpenGGSN */ |
Harald Welte | 993d060 | 2010-06-04 17:43:19 +0200 | [diff] [blame] | 2 | /* libgtp implements the GPRS Tunelling Protocol GTP per TS 09.60 / 29.060 */ |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 3 | |
| 4 | /* (C) 2010 by Harald Welte <laforge@gnumonks.org> |
Holger Hans Peter Freyther | 85531cc | 2010-10-06 20:37:09 +0800 | [diff] [blame] | 5 | * (C) 2010 by On-Waves |
Holger Hans Peter Freyther | 9ba273d | 2015-04-23 09:53:53 -0400 | [diff] [blame] | 6 | * (C) 2015 by Holger Hans Peter Freyther |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 7 | * All Rights Reserved |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 10 | * it under the terms of the GNU Affero General Public License as published by |
| 11 | * the Free Software Foundation; either version 3 of the License, or |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 17 | * GNU Affero General Public License for more details. |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 18 | * |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 19 | * You should have received a copy of the GNU Affero General Public License |
| 20 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 21 | * |
| 22 | */ |
| 23 | |
| 24 | #include <unistd.h> |
| 25 | #include <stdio.h> |
| 26 | #include <stdlib.h> |
| 27 | #include <string.h> |
| 28 | #include <getopt.h> |
| 29 | #include <errno.h> |
| 30 | #include <signal.h> |
| 31 | #include <sys/fcntl.h> |
| 32 | #include <sys/stat.h> |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 33 | #include <sys/socket.h> |
| 34 | #include <netinet/in.h> |
| 35 | #include <arpa/inet.h> |
| 36 | |
Daniel Willmann | 6292c8d | 2016-05-21 17:35:57 +0200 | [diff] [blame] | 37 | #include "bscconfig.h" |
| 38 | |
Pablo Neira Ayuso | 136f453 | 2011-03-22 16:47:59 +0100 | [diff] [blame] | 39 | #include <osmocom/core/talloc.h> |
| 40 | #include <osmocom/core/select.h> |
| 41 | #include <osmocom/core/rate_ctr.h> |
Harald Welte | ea34a4e | 2012-06-16 14:59:56 +0800 | [diff] [blame] | 42 | #include <osmocom/gprs/gprs_bssgp.h> |
Harald Welte | 53373bc | 2016-04-20 17:11:43 +0200 | [diff] [blame] | 43 | #include <osmocom/gsm/protocol/gsm_04_08_gprs.h> |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 44 | |
Neels Hofmeyr | 396f2e6 | 2017-09-04 15:13:25 +0200 | [diff] [blame] | 45 | #include <osmocom/sgsn/signal.h> |
| 46 | #include <osmocom/sgsn/debug.h> |
| 47 | #include <osmocom/sgsn/sgsn.h> |
| 48 | #include <osmocom/sgsn/gprs_llc.h> |
| 49 | #include <osmocom/sgsn/gprs_sgsn.h> |
| 50 | #include <osmocom/sgsn/gprs_gmm.h> |
| 51 | #include <osmocom/sgsn/gprs_subscriber.h> |
| 52 | #include <osmocom/sgsn/gprs_sndcp.h> |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 53 | |
Daniel Willmann | 6292c8d | 2016-05-21 17:35:57 +0200 | [diff] [blame] | 54 | #ifdef BUILD_IU |
Neels Hofmeyr | a7a3947 | 2017-07-05 15:19:52 +0200 | [diff] [blame] | 55 | #include <osmocom/ranap/iu_client.h> |
Daniel Willmann | 6292c8d | 2016-05-21 17:35:57 +0200 | [diff] [blame] | 56 | #include <osmocom/ranap/ranap_ies_defs.h> |
| 57 | #endif |
| 58 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 59 | #include <gtp.h> |
| 60 | #include <pdp.h> |
| 61 | |
Harald Welte | 686f4d6 | 2016-11-01 03:32:50 +0100 | [diff] [blame] | 62 | /* TS 23.003: The MSISDN shall take the dummy MSISDN value composed of |
| 63 | * 15 digits set to 0 (encoded as an E.164 international number) when |
| 64 | * the MSISDN is not available in messages in which the presence of the |
| 65 | * MSISDN parameter */ |
| 66 | static const uint8_t dummy_msisdn[] = |
| 67 | { 0x91, /* No extension, international, E.164 */ |
| 68 | 0, 0, 0, 0, 0, 0, 0, /* 14 digits of zeroes */ |
| 69 | 0xF0 /* 15th digit of zero + padding */ }; |
| 70 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 71 | const struct value_string gtp_cause_strs[] = { |
| 72 | { GTPCAUSE_REQ_IMSI, "Request IMSI" }, |
| 73 | { GTPCAUSE_REQ_IMEI, "Request IMEI" }, |
| 74 | { GTPCAUSE_REQ_IMSI_IMEI, "Request IMSI and IMEI" }, |
| 75 | { GTPCAUSE_NO_ID_NEEDED, "No identity needed" }, |
| 76 | { GTPCAUSE_MS_REFUSES_X, "MS refuses" }, |
| 77 | { GTPCAUSE_MS_NOT_RESP_X, "MS is not GPRS responding" }, |
| 78 | { GTPCAUSE_ACC_REQ, "Request accepted" }, |
| 79 | { GTPCAUSE_NON_EXIST, "Non-existent" }, |
| 80 | { GTPCAUSE_INVALID_MESSAGE, "Invalid message format" }, |
| 81 | { GTPCAUSE_IMSI_NOT_KNOWN, "IMSI not known" }, |
| 82 | { GTPCAUSE_MS_DETACHED, "MS is GPRS detached" }, |
| 83 | { GTPCAUSE_MS_NOT_RESP, "MS is not GPRS responding" }, |
| 84 | { GTPCAUSE_MS_REFUSES, "MS refuses" }, |
| 85 | { GTPCAUSE_NO_RESOURCES, "No resources available" }, |
| 86 | { GTPCAUSE_NOT_SUPPORTED, "Service not supported" }, |
| 87 | { GTPCAUSE_MAN_IE_INCORRECT, "Mandatory IE incorrect" }, |
| 88 | { GTPCAUSE_MAN_IE_MISSING, "Mandatory IE missing" }, |
| 89 | { GTPCAUSE_OPT_IE_INCORRECT, "Optional IE incorrect" }, |
| 90 | { GTPCAUSE_SYS_FAIL, "System failure" }, |
| 91 | { GTPCAUSE_ROAMING_REST, "Roaming restrictions" }, |
| 92 | { GTPCAUSE_PTIMSI_MISMATCH, "P-TMSI Signature mismatch" }, |
| 93 | { GTPCAUSE_CONN_SUSP, "GPRS connection suspended" }, |
| 94 | { GTPCAUSE_AUTH_FAIL, "Authentication failure" }, |
| 95 | { GTPCAUSE_USER_AUTH_FAIL, "User authentication failed" }, |
| 96 | { GTPCAUSE_CONTEXT_NOT_FOUND, "Context not found" }, |
| 97 | { GTPCAUSE_ADDR_OCCUPIED, "All dynamic PDP addresses occupied" }, |
| 98 | { GTPCAUSE_NO_MEMORY, "No memory is available" }, |
| 99 | { GTPCAUSE_RELOC_FAIL, "Relocation failure" }, |
| 100 | { GTPCAUSE_UNKNOWN_MAN_EXTHEADER, "Unknown mandatory ext. header" }, |
| 101 | { GTPCAUSE_SEM_ERR_TFT, "Semantic error in TFT operation" }, |
| 102 | { GTPCAUSE_SYN_ERR_TFT, "Syntactic error in TFT operation" }, |
| 103 | { GTPCAUSE_SEM_ERR_FILTER, "Semantic errors in packet filter" }, |
| 104 | { GTPCAUSE_SYN_ERR_FILTER, "Syntactic errors in packet filter" }, |
| 105 | { GTPCAUSE_MISSING_APN, "Missing or unknown APN" }, |
| 106 | { GTPCAUSE_UNKNOWN_PDP, "Unknown PDP address or PDP type" }, |
| 107 | { 0, NULL } |
| 108 | }; |
| 109 | |
Harald Welte | 6add7c2 | 2010-07-02 22:47:39 +0200 | [diff] [blame] | 110 | /* Generate the GTP IMSI IE according to 09.60 Section 7.9.2 */ |
| 111 | static uint64_t imsi_str2gtp(char *str) |
| 112 | { |
| 113 | uint64_t imsi64 = 0; |
| 114 | unsigned int n; |
| 115 | unsigned int imsi_len = strlen(str); |
| 116 | |
| 117 | if (imsi_len > 16) { |
| 118 | LOGP(DGPRS, LOGL_NOTICE, "IMSI length > 16 not supported!\n"); |
| 119 | return 0; |
| 120 | } |
| 121 | |
| 122 | for (n = 0; n < 16; n++) { |
| 123 | uint64_t val; |
| 124 | if (n < imsi_len) |
| 125 | val = (str[n]-'0') & 0xf; |
| 126 | else |
| 127 | val = 0xf; |
| 128 | imsi64 |= (val << (n*4)); |
| 129 | } |
| 130 | return imsi64; |
| 131 | } |
| 132 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 133 | /* generate a PDP context based on the IE's from the 04.08 message, |
| 134 | * and send the GTP create pdp context request to the GGSN */ |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 135 | struct sgsn_pdp_ctx *sgsn_create_pdp_ctx(struct sgsn_ggsn_ctx *ggsn, |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 136 | struct sgsn_mm_ctx *mmctx, |
| 137 | uint16_t nsapi, |
| 138 | struct tlv_parsed *tp) |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 139 | { |
Holger Hans Peter Freyther | 072bee5 | 2015-05-17 17:36:23 +0200 | [diff] [blame] | 140 | struct gprs_ra_id raid; |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 141 | struct sgsn_pdp_ctx *pctx; |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 142 | struct pdp_t *pdp; |
Harald Welte | 6add7c2 | 2010-07-02 22:47:39 +0200 | [diff] [blame] | 143 | uint64_t imsi_ui64; |
Holger Hans Peter Freyther | 8cedded | 2015-04-23 11:33:35 -0400 | [diff] [blame] | 144 | size_t qos_len; |
| 145 | const uint8_t *qos; |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 146 | int rc; |
| 147 | |
Pau Espin Pedrol | a98fead | 2018-07-09 14:39:47 +0200 | [diff] [blame] | 148 | pctx = sgsn_pdp_ctx_alloc(mmctx, ggsn, nsapi); |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 149 | if (!pctx) { |
| 150 | LOGP(DGPRS, LOGL_ERROR, "Couldn't allocate PDP Ctx\n"); |
| 151 | return NULL; |
| 152 | } |
| 153 | |
Harald Welte | 6add7c2 | 2010-07-02 22:47:39 +0200 | [diff] [blame] | 154 | imsi_ui64 = imsi_str2gtp(mmctx->imsi); |
| 155 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 156 | rc = pdp_newpdp(&pdp, imsi_ui64, nsapi, NULL); |
| 157 | if (rc) { |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 158 | LOGP(DGPRS, LOGL_ERROR, "Out of libgtp PDP Contexts\n"); |
| 159 | return NULL; |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 160 | } |
Harald Welte | bb1c805 | 2010-06-03 06:38:38 +0200 | [diff] [blame] | 161 | pdp->priv = pctx; |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 162 | pctx->lib = pdp; |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 163 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 164 | //pdp->peer = /* sockaddr_in of GGSN (receive) */ |
| 165 | //pdp->ipif = /* not used by library */ |
| 166 | pdp->version = ggsn->gtp_version; |
| 167 | pdp->hisaddr0 = ggsn->remote_addr; |
| 168 | pdp->hisaddr1 = ggsn->remote_addr; |
| 169 | //pdp->cch_pdp = 512; /* Charging Flat Rate */ |
| 170 | |
Holger Hans Peter Freyther | 0f7a279 | 2015-05-22 10:03:21 +0800 | [diff] [blame] | 171 | /* MS provided APN, subscription was verified by the caller */ |
| 172 | pdp->selmode = 0xFC | 0x00; |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 173 | |
| 174 | /* IMSI, TEID/TEIC, FLLU/FLLC, TID, NSAPI set in pdp_newpdp */ |
Max | a3b73e9 | 2017-09-27 15:08:17 +0200 | [diff] [blame] | 175 | LOGPDPCTXP(LOGL_NOTICE, pctx, "Create PDP Context\n"); |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 176 | |
Holger Hans Peter Freyther | 9ba273d | 2015-04-23 09:53:53 -0400 | [diff] [blame] | 177 | /* Put the MSISDN in case we have it */ |
Harald Welte | 686f4d6 | 2016-11-01 03:32:50 +0100 | [diff] [blame] | 178 | if (mmctx->subscr && mmctx->subscr->sgsn_data->msisdn_len) { |
Holger Hans Peter Freyther | 9ba273d | 2015-04-23 09:53:53 -0400 | [diff] [blame] | 179 | pdp->msisdn.l = mmctx->subscr->sgsn_data->msisdn_len; |
| 180 | if (pdp->msisdn.l > sizeof(pdp->msisdn.v)) |
Holger Hans Peter Freyther | 9861c12 | 2015-10-12 10:43:17 +0200 | [diff] [blame] | 181 | pdp->msisdn.l = sizeof(pdp->msisdn.v); |
Holger Hans Peter Freyther | 9ba273d | 2015-04-23 09:53:53 -0400 | [diff] [blame] | 182 | memcpy(pdp->msisdn.v, mmctx->subscr->sgsn_data->msisdn, |
| 183 | pdp->msisdn.l); |
Harald Welte | 686f4d6 | 2016-11-01 03:32:50 +0100 | [diff] [blame] | 184 | } else { |
| 185 | /* use the dummy 15-digits-zero MSISDN value */ |
| 186 | pdp->msisdn.l = sizeof(dummy_msisdn); |
| 187 | memcpy(pdp->msisdn.v, dummy_msisdn, pdp->msisdn.l); |
Holger Hans Peter Freyther | 9ba273d | 2015-04-23 09:53:53 -0400 | [diff] [blame] | 188 | } |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 189 | |
| 190 | /* End User Address from GMM requested PDP address */ |
| 191 | pdp->eua.l = TLVP_LEN(tp, OSMO_IE_GSM_REQ_PDP_ADDR); |
| 192 | if (pdp->eua.l > sizeof(pdp->eua.v)) |
| 193 | pdp->eua.l = sizeof(pdp->eua.v); |
| 194 | memcpy(pdp->eua.v, TLVP_VAL(tp, OSMO_IE_GSM_REQ_PDP_ADDR), |
| 195 | pdp->eua.l); |
| 196 | /* Highest 4 bits of first byte need to be set to 1, otherwise |
| 197 | * the IE is identical with the 04.08 PDP Address IE */ |
| 198 | pdp->eua.v[0] |= 0xf0; |
| 199 | |
| 200 | /* APN name from GMM */ |
Pau Espin Pedrol | faeea34 | 2018-07-17 18:08:54 +0200 | [diff] [blame] | 201 | if (TLVP_PRESENT(tp, GSM48_IE_GSM_APN)) { |
| 202 | pdp->apn_use.l = TLVP_LEN(tp, GSM48_IE_GSM_APN); |
| 203 | if (pdp->apn_use.l > sizeof(pdp->apn_use.v)) |
| 204 | pdp->apn_use.l = sizeof(pdp->apn_use.v); |
| 205 | memcpy(pdp->apn_use.v, TLVP_VAL(tp, GSM48_IE_GSM_APN), pdp->apn_use.l); |
| 206 | } else { |
| 207 | pdp->apn_use.l = 0; |
| 208 | } |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 209 | |
| 210 | /* Protocol Configuration Options from GMM */ |
Pau Espin Pedrol | faeea34 | 2018-07-17 18:08:54 +0200 | [diff] [blame] | 211 | if (TLVP_PRESENT(tp, GSM48_IE_GSM_PROTO_CONF_OPT)) { |
| 212 | pdp->pco_req.l = TLVP_LEN(tp, GSM48_IE_GSM_PROTO_CONF_OPT); |
| 213 | if (pdp->pco_req.l > sizeof(pdp->pco_req.v)) |
| 214 | pdp->pco_req.l = sizeof(pdp->pco_req.v); |
| 215 | memcpy(pdp->pco_req.v, TLVP_VAL(tp, GSM48_IE_GSM_PROTO_CONF_OPT), |
| 216 | pdp->pco_req.l); |
| 217 | } else { |
| 218 | pdp->pco_req.l = 0; |
| 219 | } |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 220 | |
Holger Hans Peter Freyther | 8cedded | 2015-04-23 11:33:35 -0400 | [diff] [blame] | 221 | /* QoS options from GMM or remote */ |
| 222 | if (TLVP_LEN(tp, OSMO_IE_GSM_SUB_QOS) > 0) { |
| 223 | qos_len = TLVP_LEN(tp, OSMO_IE_GSM_SUB_QOS); |
| 224 | qos = TLVP_VAL(tp, OSMO_IE_GSM_SUB_QOS); |
| 225 | } else { |
| 226 | qos_len = TLVP_LEN(tp, OSMO_IE_GSM_REQ_QOS); |
| 227 | qos = TLVP_VAL(tp, OSMO_IE_GSM_REQ_QOS); |
| 228 | } |
| 229 | |
Holger Hans Peter Freyther | 4bd931f | 2015-04-23 11:50:41 -0400 | [diff] [blame] | 230 | if (qos_len <= 3) { |
| 231 | pdp->qos_req.l = qos_len + 1; |
| 232 | if (pdp->qos_req.l > sizeof(pdp->qos_req.v)) |
| 233 | pdp->qos_req.l = sizeof(pdp->qos_req.v); |
| 234 | pdp->qos_req.v[0] = 0; /* Allocation/Retention policy */ |
| 235 | memcpy(&pdp->qos_req.v[1], qos, pdp->qos_req.l - 1); |
| 236 | } else { |
| 237 | pdp->qos_req.l = qos_len; |
| 238 | if (pdp->qos_req.l > sizeof(pdp->qos_req.v)) |
| 239 | pdp->qos_req.l = sizeof(pdp->qos_req.v); |
| 240 | memcpy(pdp->qos_req.v, qos, pdp->qos_req.l); |
| 241 | } |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 242 | |
Holger Hans Peter Freyther | 5db6857 | 2017-07-09 13:18:17 +0200 | [diff] [blame] | 243 | /* charging characteristics if present */ |
Holger Hans Peter Freyther | 9f30e40 | 2017-07-20 10:13:28 +0200 | [diff] [blame] | 244 | if (TLVP_LEN(tp, OSMO_IE_GSM_CHARG_CHAR) >= sizeof(pdp->cch_pdp)) |
| 245 | pdp->cch_pdp = tlvp_val16be(tp, OSMO_IE_GSM_CHARG_CHAR); |
Holger Hans Peter Freyther | 5db6857 | 2017-07-09 13:18:17 +0200 | [diff] [blame] | 246 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 247 | /* SGSN address for control plane */ |
Harald Welte | 61ca7ce | 2010-06-02 23:17:33 +0200 | [diff] [blame] | 248 | pdp->gsnlc.l = sizeof(sgsn->cfg.gtp_listenaddr.sin_addr); |
| 249 | memcpy(pdp->gsnlc.v, &sgsn->cfg.gtp_listenaddr.sin_addr, |
| 250 | sizeof(sgsn->cfg.gtp_listenaddr.sin_addr)); |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 251 | |
Daniel Willmann | 6292c8d | 2016-05-21 17:35:57 +0200 | [diff] [blame] | 252 | /* SGSN address for user plane |
| 253 | * Default to the control plane addr for now. If we are connected to a |
| 254 | * hnbgw via IuPS we'll need to send a PDP context update with the |
| 255 | * correct IP address after the RAB Assignment is complete */ |
Harald Welte | 61ca7ce | 2010-06-02 23:17:33 +0200 | [diff] [blame] | 256 | pdp->gsnlu.l = sizeof(sgsn->cfg.gtp_listenaddr.sin_addr); |
| 257 | memcpy(pdp->gsnlu.v, &sgsn->cfg.gtp_listenaddr.sin_addr, |
| 258 | sizeof(sgsn->cfg.gtp_listenaddr.sin_addr)); |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 259 | |
Harald Welte | a4feac2 | 2017-08-01 19:08:21 +0200 | [diff] [blame] | 260 | /* Encode RAT Type according to TS 29.060 7.7.50 */ |
| 261 | pdp->rattype.l = 1; |
| 262 | if (mmctx->ran_type == MM_CTX_T_UTRAN_Iu) |
| 263 | pdp->rattype.v[0] = 1; |
| 264 | else |
| 265 | pdp->rattype.v[0] = 2; |
| 266 | pdp->rattype_given = 1; |
| 267 | |
| 268 | /* Include RAI and ULI all the time */ |
Holger Hans Peter Freyther | 22093ef | 2015-05-12 21:46:58 +0200 | [diff] [blame] | 269 | pdp->rai_given = 1; |
| 270 | pdp->rai.l = 6; |
Harald Welte | a4feac2 | 2017-08-01 19:08:21 +0200 | [diff] [blame] | 271 | |
| 272 | /* Routing Area Identifier with LAC and RAC fixed values, as |
| 273 | * requested in 29.006 7.3.1 */ |
Holger Hans Peter Freyther | 072bee5 | 2015-05-17 17:36:23 +0200 | [diff] [blame] | 274 | raid = mmctx->ra; |
| 275 | raid.lac = 0xFFFE; |
| 276 | raid.rac = 0xFF; |
Max | 25c65c3 | 2018-01-08 14:43:53 +0100 | [diff] [blame] | 277 | gsm48_encode_ra((struct gsm48_ra_id *)pdp->rai.v, &raid); |
Holger Hans Peter Freyther | 22093ef | 2015-05-12 21:46:58 +0200 | [diff] [blame] | 278 | |
Harald Welte | a4feac2 | 2017-08-01 19:08:21 +0200 | [diff] [blame] | 279 | /* Encode User Location Information accordint to TS 29.060 7.7.51 */ |
| 280 | pdp->userloc_given = 1; |
| 281 | pdp->userloc.l = 8; |
Harald Welte | 42e8f21 | 2016-05-02 08:34:57 +0200 | [diff] [blame] | 282 | switch (mmctx->ran_type) { |
| 283 | case MM_CTX_T_GERAN_Gb: |
| 284 | case MM_CTX_T_GERAN_Iu: |
| 285 | pdp->rattype.v[0] = 2; |
| 286 | /* User Location Information */ |
| 287 | pdp->userloc_given = 1; |
| 288 | pdp->userloc.l = 8; |
| 289 | pdp->userloc.v[0] = 0; /* CGI for GERAN */ |
| 290 | bssgp_create_cell_id(&pdp->userloc.v[1], &mmctx->ra, mmctx->gb.cell_id); |
| 291 | break; |
| 292 | case MM_CTX_T_UTRAN_Iu: |
Harald Welte | a4feac2 | 2017-08-01 19:08:21 +0200 | [diff] [blame] | 293 | pdp->userloc.v[0] = 1; /* SAI for UTRAN */ |
| 294 | /* SAI is like CGI but with SAC instead of CID, so we can abuse this function */ |
| 295 | bssgp_create_cell_id(&pdp->userloc.v[1], &mmctx->ra, mmctx->iu.sac); |
Harald Welte | 42e8f21 | 2016-05-02 08:34:57 +0200 | [diff] [blame] | 296 | break; |
| 297 | } |
Holger Hans Peter Freyther | 6ddb6ac | 2015-05-12 22:00:22 +0200 | [diff] [blame] | 298 | |
Holger Hans Peter Freyther | d6900df | 2015-05-12 22:20:05 +0200 | [diff] [blame] | 299 | /* include the IMEI(SV) */ |
| 300 | pdp->imeisv_given = 1; |
| 301 | gsm48_encode_bcd_number(&pdp->imeisv.v[0], 8, 0, mmctx->imei); |
| 302 | pdp->imeisv.l = pdp->imeisv.v[0]; |
| 303 | memmove(&pdp->imeisv.v[0], &pdp->imeisv.v[1], 8); |
| 304 | |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 305 | /* change pdp state to 'requested' */ |
| 306 | pctx->state = PDP_STATE_CR_REQ; |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 307 | |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 308 | rc = gtp_create_context_req(ggsn->gsn, pdp, pctx); |
| 309 | /* FIXME */ |
| 310 | |
| 311 | return pctx; |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 312 | } |
| 313 | |
Harald Welte | 3357add | 2010-12-24 19:21:13 +0100 | [diff] [blame] | 314 | /* SGSN wants to delete a PDP context */ |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 315 | int sgsn_delete_pdp_ctx(struct sgsn_pdp_ctx *pctx) |
| 316 | { |
Pau Espin Pedrol | 03dc773 | 2018-07-17 12:42:12 +0200 | [diff] [blame] | 317 | LOGPDPCTXP(LOGL_INFO, pctx, "Delete PDP Context\n"); |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 318 | |
| 319 | /* FIXME: decide if we need teardown or not ! */ |
Pau Espin Pedrol | 03dc773 | 2018-07-17 12:42:12 +0200 | [diff] [blame] | 320 | return gtp_delete_context_req2(pctx->ggsn->gsn, pctx->lib, pctx, 1); |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 321 | } |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 322 | |
| 323 | struct cause_map { |
| 324 | uint8_t cause_in; |
| 325 | uint8_t cause_out; |
| 326 | }; |
| 327 | |
| 328 | static uint8_t cause_map(const struct cause_map *map, uint8_t in, uint8_t deflt) |
| 329 | { |
| 330 | const struct cause_map *m; |
| 331 | |
| 332 | for (m = map; m->cause_in && m->cause_out; m++) { |
| 333 | if (m->cause_in == in) |
| 334 | return m->cause_out; |
| 335 | } |
| 336 | return deflt; |
| 337 | } |
| 338 | |
| 339 | /* how do we map from gtp cause to SM cause */ |
| 340 | static const struct cause_map gtp2sm_cause_map[] = { |
| 341 | { GTPCAUSE_NO_RESOURCES, GSM_CAUSE_INSUFF_RSRC }, |
| 342 | { GTPCAUSE_NOT_SUPPORTED, GSM_CAUSE_SERV_OPT_NOTSUPP }, |
| 343 | { GTPCAUSE_MAN_IE_INCORRECT, GSM_CAUSE_INV_MAND_INFO }, |
| 344 | { GTPCAUSE_MAN_IE_MISSING, GSM_CAUSE_INV_MAND_INFO }, |
| 345 | { GTPCAUSE_OPT_IE_INCORRECT, GSM_CAUSE_PROTO_ERR_UNSPEC }, |
| 346 | { GTPCAUSE_SYS_FAIL, GSM_CAUSE_NET_FAIL }, |
| 347 | { GTPCAUSE_ROAMING_REST, GSM_CAUSE_REQ_SERV_OPT_NOTSUB }, |
| 348 | { GTPCAUSE_PTIMSI_MISMATCH, GSM_CAUSE_PROTO_ERR_UNSPEC }, |
| 349 | { GTPCAUSE_CONN_SUSP, GSM_CAUSE_PROTO_ERR_UNSPEC }, |
| 350 | { GTPCAUSE_AUTH_FAIL, GSM_CAUSE_AUTH_FAILED }, |
| 351 | { GTPCAUSE_USER_AUTH_FAIL, GSM_CAUSE_ACT_REJ_GGSN }, |
| 352 | { GTPCAUSE_CONTEXT_NOT_FOUND, GSM_CAUSE_PROTO_ERR_UNSPEC }, |
| 353 | { GTPCAUSE_ADDR_OCCUPIED, GSM_CAUSE_INSUFF_RSRC }, |
| 354 | { GTPCAUSE_NO_MEMORY, GSM_CAUSE_INSUFF_RSRC }, |
| 355 | { GTPCAUSE_RELOC_FAIL, GSM_CAUSE_PROTO_ERR_UNSPEC }, |
| 356 | { GTPCAUSE_UNKNOWN_MAN_EXTHEADER, GSM_CAUSE_PROTO_ERR_UNSPEC }, |
| 357 | { GTPCAUSE_MISSING_APN, GSM_CAUSE_MISSING_APN }, |
| 358 | { GTPCAUSE_UNKNOWN_PDP, GSM_CAUSE_UNKNOWN_PDP }, |
| 359 | { 0, 0 } |
| 360 | }; |
| 361 | |
Daniel Willmann | 62ff384 | 2016-05-21 01:40:19 +0200 | [diff] [blame] | 362 | static int send_act_pdp_cont_acc(struct sgsn_pdp_ctx *pctx) |
| 363 | { |
| 364 | struct sgsn_signal_data sig_data; |
Philipp | f1f3436 | 2016-08-26 17:00:21 +0200 | [diff] [blame] | 365 | int rc; |
| 366 | struct gprs_llc_lle *lle; |
Daniel Willmann | 62ff384 | 2016-05-21 01:40:19 +0200 | [diff] [blame] | 367 | |
| 368 | /* Inform others about it */ |
| 369 | memset(&sig_data, 0, sizeof(sig_data)); |
| 370 | sig_data.pdp = pctx; |
| 371 | osmo_signal_dispatch(SS_SGSN, S_SGSN_PDP_ACT, &sig_data); |
| 372 | |
| 373 | /* Send PDP CTX ACT to MS */ |
Philipp | f1f3436 | 2016-08-26 17:00:21 +0200 | [diff] [blame] | 374 | rc = gsm48_tx_gsm_act_pdp_acc(pctx); |
Harald Welte | 7e5bb62 | 2016-09-28 08:20:58 +0800 | [diff] [blame] | 375 | if (rc < 0) |
Philipp | f1f3436 | 2016-08-26 17:00:21 +0200 | [diff] [blame] | 376 | return rc; |
| 377 | |
Neels Hofmeyr | c6a44bb | 2016-09-28 13:44:39 +0200 | [diff] [blame] | 378 | if (pctx->mm->ran_type == MM_CTX_T_GERAN_Gb) { |
| 379 | /* Send SNDCP XID to MS */ |
| 380 | lle = &pctx->mm->gb.llme->lle[pctx->sapi]; |
| 381 | rc = sndcp_sn_xid_req(lle,pctx->nsapi); |
| 382 | if (rc < 0) |
| 383 | return rc; |
| 384 | } |
Philipp | f1f3436 | 2016-08-26 17:00:21 +0200 | [diff] [blame] | 385 | |
| 386 | return 0; |
Daniel Willmann | 62ff384 | 2016-05-21 01:40:19 +0200 | [diff] [blame] | 387 | } |
| 388 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 389 | /* The GGSN has confirmed the creation of a PDP Context */ |
| 390 | static int create_pdp_conf(struct pdp_t *pdp, void *cbp, int cause) |
| 391 | { |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 392 | struct sgsn_pdp_ctx *pctx = cbp; |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 393 | uint8_t reject_cause; |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 394 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 395 | LOGPDPCTXP(LOGL_INFO, pctx, "Received CREATE PDP CTX CONF, cause=%d(%s)\n", |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 396 | cause, get_value_string(gtp_cause_strs, cause)); |
| 397 | |
Jacob Erlbeck | 99985b5 | 2014-10-13 10:32:00 +0200 | [diff] [blame] | 398 | if (!pctx->mm) { |
| 399 | LOGP(DGPRS, LOGL_INFO, |
| 400 | "No MM context, aborting CREATE PDP CTX CONF\n"); |
| 401 | return -EIO; |
| 402 | } |
| 403 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 404 | /* Check for cause value if it was really successful */ |
| 405 | if (cause < 0) { |
| 406 | LOGP(DGPRS, LOGL_NOTICE, "Create PDP ctx req timed out\n"); |
Harald Welte | 1371f7d | 2010-06-01 11:52:41 +0200 | [diff] [blame] | 407 | if (pdp && pdp->version == 1) { |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 408 | pdp->version = 0; |
Harald Welte | 8fc1a46 | 2010-05-17 00:53:10 +0200 | [diff] [blame] | 409 | gtp_create_context_req(sgsn->gsn, pdp, cbp); |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 410 | return 0; |
| 411 | } else { |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 412 | reject_cause = GSM_CAUSE_NET_FAIL; |
| 413 | goto reject; |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 414 | } |
| 415 | } |
| 416 | |
| 417 | /* Check for cause value if it was really successful */ |
| 418 | if (cause != GTPCAUSE_ACC_REQ) { |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 419 | reject_cause = cause_map(gtp2sm_cause_map, cause, |
| 420 | GSM_CAUSE_ACT_REJ_GGSN); |
| 421 | goto reject; |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 422 | } |
| 423 | |
Daniel Willmann | f9f4387 | 2016-05-20 22:36:23 +0200 | [diff] [blame] | 424 | if (pctx->mm->ran_type == MM_CTX_T_GERAN_Gb) { |
| 425 | /* Activate the SNDCP layer */ |
| 426 | sndcp_sm_activate_ind(&pctx->mm->gb.llme->lle[pctx->sapi], pctx->nsapi); |
| 427 | return send_act_pdp_cont_acc(pctx); |
Daniel Willmann | 6b7b319 | 2016-05-21 00:53:42 +0200 | [diff] [blame] | 428 | } else if (pctx->mm->ran_type == MM_CTX_T_UTRAN_Iu) { |
| 429 | #ifdef BUILD_IU |
| 430 | /* Activate a radio bearer */ |
Neels Hofmeyr | 2188a77 | 2016-05-20 21:59:55 +0200 | [diff] [blame] | 431 | iu_rab_act_ps(pdp->nsapi, pctx); |
Daniel Willmann | 6b7b319 | 2016-05-21 00:53:42 +0200 | [diff] [blame] | 432 | return 0; |
| 433 | #else |
| 434 | return -ENOTSUP; |
| 435 | #endif |
Daniel Willmann | f9f4387 | 2016-05-20 22:36:23 +0200 | [diff] [blame] | 436 | } |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 437 | |
Neels Hofmeyr | 67933a1 | 2016-07-23 22:23:17 +0200 | [diff] [blame] | 438 | LOGP(DGPRS, LOGL_ERROR, "Unknown ran_type %d\n", |
| 439 | pctx->mm->ran_type); |
| 440 | reject_cause = GSM_CAUSE_PROTO_ERR_UNSPEC; |
| 441 | |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 442 | reject: |
Holger Hans Peter Freyther | 598e7b3 | 2013-07-30 08:45:29 +0200 | [diff] [blame] | 443 | /* |
| 444 | * In case of a timeout pdp will be NULL but we have a valid pointer |
| 445 | * in pctx->lib. For other rejects pctx->lib and pdp might be the |
| 446 | * same. |
| 447 | */ |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 448 | pctx->state = PDP_STATE_NONE; |
Holger Hans Peter Freyther | 598e7b3 | 2013-07-30 08:45:29 +0200 | [diff] [blame] | 449 | if (pctx->lib && pctx->lib != pdp) |
| 450 | pdp_freepdp(pctx->lib); |
| 451 | pctx->lib = NULL; |
| 452 | |
Harald Welte | 1371f7d | 2010-06-01 11:52:41 +0200 | [diff] [blame] | 453 | if (pdp) |
| 454 | pdp_freepdp(pdp); |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 455 | /* Send PDP CTX ACT REJ to MS */ |
Holger Hans Peter Freyther | 65762e0 | 2014-04-04 12:49:00 +0200 | [diff] [blame] | 456 | gsm48_tx_gsm_act_pdp_rej(pctx->mm, pctx->ti, reject_cause, |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 457 | 0, NULL); |
Harald Welte | f11b6d2 | 2010-06-02 10:09:50 +0200 | [diff] [blame] | 458 | sgsn_pdp_ctx_free(pctx); |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 459 | |
| 460 | return EOF; |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 461 | } |
| 462 | |
Daniel Willmann | 21b269f | 2016-05-11 12:43:47 +0200 | [diff] [blame] | 463 | void sgsn_pdp_upd_gtp_u(struct sgsn_pdp_ctx *pdp, void *addr, size_t alen) |
| 464 | { |
| 465 | pdp->lib->gsnlu.l = alen; |
| 466 | memcpy(pdp->lib->gsnlu.v, addr, alen); |
| 467 | gtp_update_context(pdp->ggsn->gsn, pdp->lib, pdp, &pdp->lib->hisaddr0); |
| 468 | } |
| 469 | |
Pau Espin Pedrol | fa12010 | 2018-07-09 20:37:47 +0200 | [diff] [blame] | 470 | void sgsn_ggsn_echo_req(struct sgsn_ggsn_ctx *ggc) |
| 471 | { |
| 472 | gtp_echo_req(ggc->gsn, ggc->gtp_version, NULL, &ggc->remote_addr); |
| 473 | } |
| 474 | |
Daniel Willmann | 6292c8d | 2016-05-21 17:35:57 +0200 | [diff] [blame] | 475 | #ifdef BUILD_IU |
| 476 | /* Callback for RAB assignment response */ |
| 477 | int sgsn_ranap_rab_ass_resp(struct sgsn_mm_ctx *ctx, RANAP_RAB_SetupOrModifiedItemIEs_t *setup_ies) |
| 478 | { |
| 479 | uint8_t rab_id; |
| 480 | bool require_pdp_update = false; |
| 481 | struct sgsn_pdp_ctx *pdp = NULL; |
| 482 | RANAP_RAB_SetupOrModifiedItem_t *item = &setup_ies->raB_SetupOrModifiedItem; |
| 483 | |
| 484 | rab_id = item->rAB_ID.buf[0]; |
| 485 | |
| 486 | pdp = sgsn_pdp_ctx_by_nsapi(ctx, rab_id); |
| 487 | if (!pdp) { |
| 488 | LOGP(DRANAP, LOGL_ERROR, "RAB Assignment Response for unknown RAB/NSAPI=%u\n", rab_id); |
| 489 | return -1; |
| 490 | } |
| 491 | |
| 492 | if (item->transportLayerAddress) { |
| 493 | LOGPC(DRANAP, LOGL_INFO, " Setup: (%u/%s)", rab_id, osmo_hexdump(item->transportLayerAddress->buf, |
| 494 | item->transportLayerAddress->size)); |
| 495 | switch (item->transportLayerAddress->size) { |
| 496 | case 7: |
| 497 | /* It must be IPv4 inside a X213 NSAP */ |
| 498 | memcpy(pdp->lib->gsnlu.v, &item->transportLayerAddress->buf[3], 4); |
| 499 | break; |
| 500 | case 4: |
| 501 | /* It must be a raw IPv4 address */ |
| 502 | memcpy(pdp->lib->gsnlu.v, item->transportLayerAddress->buf, 4); |
| 503 | break; |
| 504 | case 16: |
| 505 | /* TODO: It must be a raw IPv6 address */ |
| 506 | case 19: |
| 507 | /* TODO: It must be IPv6 inside a X213 NSAP */ |
| 508 | default: |
| 509 | LOGP(DRANAP, LOGL_ERROR, "RAB Assignment Resp: Unknown " |
| 510 | "transport layer address size %u\n", |
| 511 | item->transportLayerAddress->size); |
| 512 | return -1; |
| 513 | } |
| 514 | require_pdp_update = true; |
| 515 | } |
| 516 | |
| 517 | /* The TEI on the RNC side might have changed, too */ |
| 518 | if (item->iuTransportAssociation && |
| 519 | item->iuTransportAssociation->present == RANAP_IuTransportAssociation_PR_gTP_TEI && |
| 520 | item->iuTransportAssociation->choice.gTP_TEI.buf && |
| 521 | item->iuTransportAssociation->choice.gTP_TEI.size >= 4) { |
| 522 | uint32_t tei = osmo_load32be(item->iuTransportAssociation->choice.gTP_TEI.buf); |
| 523 | LOGP(DRANAP, LOGL_DEBUG, "Updating TEID on RNC side from 0x%08x to 0x%08x\n", |
| 524 | pdp->lib->teid_own, tei); |
| 525 | pdp->lib->teid_own = tei; |
| 526 | require_pdp_update = true; |
| 527 | } |
| 528 | |
| 529 | if (require_pdp_update) |
| 530 | gtp_update_context(pdp->ggsn->gsn, pdp->lib, pdp, &pdp->lib->hisaddr0); |
| 531 | |
| 532 | if (pdp->state != PDP_STATE_CR_CONF) { |
| 533 | send_act_pdp_cont_acc(pdp); |
| 534 | pdp->state = PDP_STATE_CR_CONF; |
| 535 | } |
| 536 | return 0; |
| 537 | |
| 538 | } |
| 539 | #endif |
| 540 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 541 | /* Confirmation of a PDP Context Delete */ |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 542 | static int delete_pdp_conf(struct pdp_t *pdp, void *cbp, int cause) |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 543 | { |
Holger Hans Peter Freyther | b100895 | 2015-05-02 19:55:38 +0200 | [diff] [blame] | 544 | struct sgsn_signal_data sig_data; |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 545 | struct sgsn_pdp_ctx *pctx = cbp; |
Jacob Erlbeck | 99985b5 | 2014-10-13 10:32:00 +0200 | [diff] [blame] | 546 | int rc = 0; |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 547 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 548 | LOGPDPCTXP(LOGL_INFO, pctx, "Received DELETE PDP CTX CONF, cause=%d(%s)\n", |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 549 | cause, get_value_string(gtp_cause_strs, cause)); |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 550 | |
Holger Hans Peter Freyther | b100895 | 2015-05-02 19:55:38 +0200 | [diff] [blame] | 551 | memset(&sig_data, 0, sizeof(sig_data)); |
| 552 | sig_data.pdp = pctx; |
| 553 | osmo_signal_dispatch(SS_SGSN, S_SGSN_PDP_DEACT, &sig_data); |
| 554 | |
Jacob Erlbeck | 99985b5 | 2014-10-13 10:32:00 +0200 | [diff] [blame] | 555 | if (pctx->mm) { |
Daniel Willmann | f9f4387 | 2016-05-20 22:36:23 +0200 | [diff] [blame] | 556 | if (pctx->mm->ran_type == MM_CTX_T_GERAN_Gb) { |
| 557 | /* Deactivate the SNDCP layer */ |
| 558 | sndcp_sm_deactivate_ind(&pctx->mm->gb.llme->lle[pctx->sapi], pctx->nsapi); |
Daniel Willmann | 7bc6986 | 2016-05-21 00:55:25 +0200 | [diff] [blame] | 559 | } else { |
| 560 | #ifdef BUILD_IU |
| 561 | /* Deactivate radio bearer */ |
Neels Hofmeyr | a7a3947 | 2017-07-05 15:19:52 +0200 | [diff] [blame] | 562 | ranap_iu_rab_deact(pctx->mm->iu.ue_ctx, 1); |
Daniel Willmann | 7bc6986 | 2016-05-21 00:55:25 +0200 | [diff] [blame] | 563 | #else |
| 564 | return -ENOTSUP; |
| 565 | #endif |
Daniel Willmann | f9f4387 | 2016-05-20 22:36:23 +0200 | [diff] [blame] | 566 | } |
Harald Welte | 8fc60f0 | 2010-06-28 22:21:57 +0200 | [diff] [blame] | 567 | |
Jacob Erlbeck | 99985b5 | 2014-10-13 10:32:00 +0200 | [diff] [blame] | 568 | /* Confirm deactivation of PDP context to MS */ |
| 569 | rc = gsm48_tx_gsm_deact_pdp_acc(pctx); |
| 570 | } else { |
| 571 | LOGPDPCTXP(LOGL_NOTICE, pctx, |
| 572 | "Not deactivating SNDCP layer since the MM context " |
| 573 | "is not available\n"); |
| 574 | } |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 575 | |
| 576 | sgsn_pdp_ctx_free(pctx); |
| 577 | |
| 578 | return rc; |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 579 | } |
| 580 | |
| 581 | /* Confirmation of an GTP ECHO request */ |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 582 | static int echo_conf(struct pdp_t *pdp, void *cbp, int recovery) |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 583 | { |
| 584 | if (recovery < 0) { |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 585 | LOGP(DGPRS, LOGL_NOTICE, "GTP Echo Request timed out\n"); |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 586 | /* FIXME: if version == 1, retry with version 0 */ |
| 587 | } else { |
| 588 | DEBUGP(DGPRS, "GTP Rx Echo Response\n"); |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 589 | } |
| 590 | return 0; |
| 591 | } |
| 592 | |
| 593 | /* Any message received by GGSN contains a recovery IE */ |
Pau Espin Pedrol | ef6d78f | 2018-07-17 15:56:53 +0200 | [diff] [blame] | 594 | static int cb_recovery2(struct sockaddr_in *peer, struct pdp_t *pdp, uint8_t recovery) |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 595 | { |
| 596 | struct sgsn_ggsn_ctx *ggsn; |
Pau Espin Pedrol | ef6d78f | 2018-07-17 15:56:53 +0200 | [diff] [blame] | 597 | struct sgsn_pdp_ctx *pctx = NULL; |
Pau Espin Pedrol | e77ee12 | 2018-02-12 17:40:33 +0100 | [diff] [blame] | 598 | |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 599 | ggsn = sgsn_ggsn_ctx_by_addr(&peer->sin_addr); |
| 600 | if (!ggsn) { |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 601 | LOGP(DGPRS, LOGL_NOTICE, "Received Recovery IE for unknown GGSN\n"); |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 602 | return -EINVAL; |
| 603 | } |
| 604 | |
| 605 | if (ggsn->remote_restart_ctr == -1) { |
| 606 | /* First received ECHO RESPONSE, note the restart ctr */ |
| 607 | ggsn->remote_restart_ctr = recovery; |
| 608 | } else if (ggsn->remote_restart_ctr != recovery) { |
| 609 | /* counter has changed (GGSN restart): release all PDP */ |
Pau Espin Pedrol | ef6d78f | 2018-07-17 15:56:53 +0200 | [diff] [blame] | 610 | LOGP(DGPRS, LOGL_NOTICE, "GGSN recovery (%u->%u) pdp=%p, " |
| 611 | "releasing all%s PDP contexts\n", |
| 612 | ggsn->remote_restart_ctr, recovery, pdp, pdp ? " other" : ""); |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 613 | ggsn->remote_restart_ctr = recovery; |
Pau Espin Pedrol | ef6d78f | 2018-07-17 15:56:53 +0200 | [diff] [blame] | 614 | if (pdp) |
| 615 | pctx = pdp->priv; |
| 616 | sgsn_ggsn_ctx_drop_all_pdp_except(ggsn, pctx); |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 617 | } |
| 618 | return 0; |
| 619 | } |
| 620 | |
| 621 | /* libgtp callback for confirmations */ |
| 622 | static int cb_conf(int type, int cause, struct pdp_t *pdp, void *cbp) |
| 623 | { |
| 624 | DEBUGP(DGPRS, "libgtp cb_conf(type=%d, cause=%d, pdp=%p, cbp=%p)\n", |
| 625 | type, cause, pdp, cbp); |
| 626 | |
| 627 | if (cause == EOF) |
| 628 | LOGP(DGPRS, LOGL_ERROR, "libgtp EOF (type=%u, pdp=%p, cbp=%p)\n", |
| 629 | type, pdp, cbp); |
| 630 | |
| 631 | switch (type) { |
| 632 | case GTP_ECHO_REQ: |
Harald Welte | 3357add | 2010-12-24 19:21:13 +0100 | [diff] [blame] | 633 | /* libgtp hands us the RECOVERY number instead of a cause */ |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 634 | return echo_conf(pdp, cbp, cause); |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 635 | case GTP_CREATE_PDP_REQ: |
| 636 | return create_pdp_conf(pdp, cbp, cause); |
| 637 | case GTP_DELETE_PDP_REQ: |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 638 | return delete_pdp_conf(pdp, cbp, cause); |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 639 | default: |
| 640 | break; |
| 641 | } |
| 642 | return 0; |
| 643 | } |
| 644 | |
| 645 | /* Called whenever a PDP context is deleted for any reason */ |
| 646 | static int cb_delete_context(struct pdp_t *pdp) |
| 647 | { |
Pau Espin Pedrol | 2cf70e0 | 2018-07-16 11:31:23 +0200 | [diff] [blame] | 648 | struct sgsn_pdp_ctx *pctx = pdp->priv; |
| 649 | |
Pau Espin Pedrol | 80d407f | 2018-07-09 20:42:20 +0200 | [diff] [blame] | 650 | LOGPDPX(DGPRS, LOGL_INFO, pdp, "Context %p was deleted\n", pdp); |
Max | a3b73e9 | 2017-09-27 15:08:17 +0200 | [diff] [blame] | 651 | |
Pau Espin Pedrol | 2cf70e0 | 2018-07-16 11:31:23 +0200 | [diff] [blame] | 652 | /* unlink the now non-existing library handle from the pdp |
| 653 | * context */ |
| 654 | pctx->lib = NULL; |
| 655 | |
| 656 | sgsn_ggsn_ctx_drop_pdp(pctx); |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 657 | return 0; |
| 658 | } |
| 659 | |
| 660 | /* Called when we receive a Version Not Supported message */ |
| 661 | static int cb_unsup_ind(struct sockaddr_in *peer) |
| 662 | { |
| 663 | LOGP(DGPRS, LOGL_INFO, "GTP Version not supported Indication " |
| 664 | "from %s:%u\n", inet_ntoa(peer->sin_addr), |
| 665 | ntohs(peer->sin_port)); |
| 666 | return 0; |
| 667 | } |
| 668 | |
| 669 | /* Called when we receive a Supported Ext Headers Notification */ |
| 670 | static int cb_extheader_ind(struct sockaddr_in *peer) |
| 671 | { |
Pau Espin Pedrol | e77ee12 | 2018-02-12 17:40:33 +0100 | [diff] [blame] | 672 | LOGP(DGPRS, LOGL_INFO, "GTP Supported Ext Headers Notification " |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 673 | "from %s:%u\n", inet_ntoa(peer->sin_addr), |
| 674 | ntohs(peer->sin_port)); |
| 675 | return 0; |
| 676 | } |
| 677 | |
Pau Espin Pedrol | e77ee12 | 2018-02-12 17:40:33 +0100 | [diff] [blame] | 678 | /* Called whenever we receive a DATA packet */ |
Harald Welte | bb1c805 | 2010-06-03 06:38:38 +0200 | [diff] [blame] | 679 | static int cb_data_ind(struct pdp_t *lib, void *packet, unsigned int len) |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 680 | { |
Harald Welte | bb35c45 | 2010-06-09 16:22:28 +0200 | [diff] [blame] | 681 | struct bssgp_paging_info pinfo; |
Harald Welte | bb1c805 | 2010-06-03 06:38:38 +0200 | [diff] [blame] | 682 | struct sgsn_pdp_ctx *pdp; |
Harald Welte | bb35c45 | 2010-06-09 16:22:28 +0200 | [diff] [blame] | 683 | struct sgsn_mm_ctx *mm; |
| 684 | struct msgb *msg; |
Harald Welte | bb1c805 | 2010-06-03 06:38:38 +0200 | [diff] [blame] | 685 | uint8_t *ud; |
| 686 | |
Harald Welte | bb1c805 | 2010-06-03 06:38:38 +0200 | [diff] [blame] | 687 | pdp = lib->priv; |
| 688 | if (!pdp) { |
Harald Welte | fdf453c | 2012-07-14 12:15:19 +0200 | [diff] [blame] | 689 | LOGP(DGPRS, LOGL_NOTICE, |
| 690 | "GTP DATA IND from GGSN for unknown PDP\n"); |
Harald Welte | bb1c805 | 2010-06-03 06:38:38 +0200 | [diff] [blame] | 691 | return -EIO; |
| 692 | } |
Harald Welte | bb35c45 | 2010-06-09 16:22:28 +0200 | [diff] [blame] | 693 | mm = pdp->mm; |
Harald Welte | fdf453c | 2012-07-14 12:15:19 +0200 | [diff] [blame] | 694 | if (!mm) { |
| 695 | LOGP(DGPRS, LOGL_ERROR, |
Max | 0436e42 | 2017-03-02 13:28:52 +0100 | [diff] [blame] | 696 | "PDP context (address=%u) without MM context!\n", |
| 697 | pdp->address); |
Harald Welte | fdf453c | 2012-07-14 12:15:19 +0200 | [diff] [blame] | 698 | return -EIO; |
| 699 | } |
Harald Welte | bb1c805 | 2010-06-03 06:38:38 +0200 | [diff] [blame] | 700 | |
Max | 0436e42 | 2017-03-02 13:28:52 +0100 | [diff] [blame] | 701 | DEBUGP(DGPRS, "GTP DATA IND from GGSN for %s, length=%u\n", mm->imsi, |
| 702 | len); |
| 703 | |
Daniel Willmann | 21b269f | 2016-05-11 12:43:47 +0200 | [diff] [blame] | 704 | if (mm->ran_type == MM_CTX_T_UTRAN_Iu) { |
| 705 | #ifdef BUILD_IU |
| 706 | /* Ignore the packet for now and page the UE to get the RAB |
| 707 | * reestablished */ |
Neels Hofmeyr | a7a3947 | 2017-07-05 15:19:52 +0200 | [diff] [blame] | 708 | ranap_iu_page_ps(mm->imsi, &mm->p_tmsi, mm->ra.lac, mm->ra.rac); |
Daniel Willmann | 21b269f | 2016-05-11 12:43:47 +0200 | [diff] [blame] | 709 | |
| 710 | return 0; |
| 711 | #else |
| 712 | return -ENOTSUP; |
| 713 | #endif |
| 714 | } |
| 715 | |
Sylvain Munaut | 5914bad | 2010-06-09 20:49:24 +0200 | [diff] [blame] | 716 | msg = msgb_alloc_headroom(len+256, 128, "GTP->SNDCP"); |
Harald Welte | bb1c805 | 2010-06-03 06:38:38 +0200 | [diff] [blame] | 717 | ud = msgb_put(msg, len); |
| 718 | memcpy(ud, packet, len); |
| 719 | |
Harald Welte | f97ee04 | 2015-12-25 19:12:21 +0100 | [diff] [blame] | 720 | msgb_tlli(msg) = mm->gb.tlli; |
| 721 | msgb_bvci(msg) = mm->gb.bvci; |
| 722 | msgb_nsei(msg) = mm->gb.nsei; |
Harald Welte | bb1c805 | 2010-06-03 06:38:38 +0200 | [diff] [blame] | 723 | |
Alexander Couzens | 4f8da6d | 2017-01-31 15:34:26 +0100 | [diff] [blame] | 724 | switch (mm->gmm_state) { |
Harald Welte | bb35c45 | 2010-06-09 16:22:28 +0200 | [diff] [blame] | 725 | case GMM_REGISTERED_SUSPENDED: |
| 726 | /* initiate PS PAGING procedure */ |
| 727 | memset(&pinfo, 0, sizeof(pinfo)); |
| 728 | pinfo.mode = BSSGP_PAGING_PS; |
| 729 | pinfo.scope = BSSGP_PAGING_BVCI; |
Harald Welte | f97ee04 | 2015-12-25 19:12:21 +0100 | [diff] [blame] | 730 | pinfo.bvci = mm->gb.bvci; |
Harald Welte | bb35c45 | 2010-06-09 16:22:28 +0200 | [diff] [blame] | 731 | pinfo.imsi = mm->imsi; |
Harald Welte | 937a9ec | 2010-07-01 11:53:25 +0200 | [diff] [blame] | 732 | pinfo.ptmsi = &mm->p_tmsi; |
Harald Welte | bb35c45 | 2010-06-09 16:22:28 +0200 | [diff] [blame] | 733 | pinfo.drx_params = mm->drx_parms; |
| 734 | pinfo.qos[0] = 0; // FIXME |
Harald Welte | f97ee04 | 2015-12-25 19:12:21 +0100 | [diff] [blame] | 735 | bssgp_tx_paging(mm->gb.nsei, 0, &pinfo); |
Harald Welte | efbdee9 | 2010-06-10 00:20:12 +0200 | [diff] [blame] | 736 | rate_ctr_inc(&mm->ctrg->ctr[GMM_CTR_PAGING_PS]); |
Harald Welte | bb35c45 | 2010-06-09 16:22:28 +0200 | [diff] [blame] | 737 | /* FIXME: queue the packet we received from GTP */ |
| 738 | break; |
| 739 | case GMM_REGISTERED_NORMAL: |
| 740 | break; |
| 741 | default: |
| 742 | LOGP(DGPRS, LOGL_ERROR, "GTP DATA IND for TLLI %08X in state " |
Alexander Couzens | 4f8da6d | 2017-01-31 15:34:26 +0100 | [diff] [blame] | 743 | "%u\n", mm->gb.tlli, mm->gmm_state); |
Harald Welte | bb35c45 | 2010-06-09 16:22:28 +0200 | [diff] [blame] | 744 | msgb_free(msg); |
| 745 | return -1; |
| 746 | } |
| 747 | |
Harald Welte | efbdee9 | 2010-06-10 00:20:12 +0200 | [diff] [blame] | 748 | rate_ctr_inc(&pdp->ctrg->ctr[PDP_CTR_PKTS_UDATA_OUT]); |
| 749 | rate_ctr_add(&pdp->ctrg->ctr[PDP_CTR_BYTES_UDATA_OUT], len); |
| 750 | rate_ctr_inc(&mm->ctrg->ctr[GMM_CTR_PKTS_UDATA_OUT]); |
| 751 | rate_ctr_add(&mm->ctrg->ctr[GMM_CTR_BYTES_UDATA_OUT], len); |
| 752 | |
Holger Hans Peter Freyther | 4f5b823 | 2015-05-05 22:25:48 +0200 | [diff] [blame] | 753 | /* It is easier to have a global count */ |
| 754 | pdp->cdr_bytes_out += len; |
| 755 | |
Harald Welte | f97ee04 | 2015-12-25 19:12:21 +0100 | [diff] [blame] | 756 | return sndcp_unitdata_req(msg, &mm->gb.llme->lle[pdp->sapi], |
Harald Welte | bb35c45 | 2010-06-09 16:22:28 +0200 | [diff] [blame] | 757 | pdp->nsapi, mm); |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 758 | } |
| 759 | |
Harald Welte | ebabdea | 2010-06-01 18:28:10 +0200 | [diff] [blame] | 760 | /* Called by SNDCP when it has received/re-assembled a N-PDU */ |
Harald Welte | 8911cef | 2010-07-01 19:56:19 +0200 | [diff] [blame] | 761 | int sgsn_rx_sndcp_ud_ind(struct gprs_ra_id *ra_id, int32_t tlli, uint8_t nsapi, |
| 762 | struct msgb *msg, uint32_t npdu_len, uint8_t *npdu) |
Harald Welte | ebabdea | 2010-06-01 18:28:10 +0200 | [diff] [blame] | 763 | { |
| 764 | struct sgsn_mm_ctx *mmctx; |
| 765 | struct sgsn_pdp_ctx *pdp; |
Harald Welte | ebabdea | 2010-06-01 18:28:10 +0200 | [diff] [blame] | 766 | |
| 767 | /* look-up the MM context for this message */ |
Harald Welte | 8911cef | 2010-07-01 19:56:19 +0200 | [diff] [blame] | 768 | mmctx = sgsn_mm_ctx_by_tlli(tlli, ra_id); |
Harald Welte | ebabdea | 2010-06-01 18:28:10 +0200 | [diff] [blame] | 769 | if (!mmctx) { |
| 770 | LOGP(DGPRS, LOGL_ERROR, |
| 771 | "Cannot find MM CTX for TLLI %08x\n", tlli); |
| 772 | return -EIO; |
| 773 | } |
| 774 | /* look-up the PDP context for this message */ |
| 775 | pdp = sgsn_pdp_ctx_by_nsapi(mmctx, nsapi); |
| 776 | if (!pdp) { |
| 777 | LOGP(DGPRS, LOGL_ERROR, "Cannot find PDP CTX for " |
| 778 | "TLLI=%08x, NSAPI=%u\n", tlli, nsapi); |
| 779 | return -EIO; |
| 780 | } |
| 781 | if (!pdp->lib) { |
| 782 | LOGP(DGPRS, LOGL_ERROR, "PDP CTX without libgtp\n"); |
| 783 | return -EIO; |
| 784 | } |
Harald Welte | efbdee9 | 2010-06-10 00:20:12 +0200 | [diff] [blame] | 785 | |
| 786 | rate_ctr_inc(&pdp->ctrg->ctr[PDP_CTR_PKTS_UDATA_IN]); |
| 787 | rate_ctr_add(&pdp->ctrg->ctr[PDP_CTR_BYTES_UDATA_IN], npdu_len); |
| 788 | rate_ctr_inc(&mmctx->ctrg->ctr[GMM_CTR_PKTS_UDATA_IN]); |
| 789 | rate_ctr_add(&mmctx->ctrg->ctr[GMM_CTR_BYTES_UDATA_IN], npdu_len); |
| 790 | |
Holger Hans Peter Freyther | 4f5b823 | 2015-05-05 22:25:48 +0200 | [diff] [blame] | 791 | /* It is easier to have a global count */ |
| 792 | pdp->cdr_bytes_in += npdu_len; |
| 793 | |
Harald Welte | efbdee9 | 2010-06-10 00:20:12 +0200 | [diff] [blame] | 794 | return gtp_data_req(pdp->ggsn->gsn, pdp->lib, npdu, npdu_len); |
Harald Welte | ebabdea | 2010-06-01 18:28:10 +0200 | [diff] [blame] | 795 | } |
| 796 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 797 | /* libgtp select loop integration */ |
Pablo Neira Ayuso | 4db9299 | 2011-05-06 12:11:23 +0200 | [diff] [blame] | 798 | static int sgsn_gtp_fd_cb(struct osmo_fd *fd, unsigned int what) |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 799 | { |
| 800 | struct sgsn_instance *sgi = fd->data; |
| 801 | int rc; |
| 802 | |
| 803 | if (!(what & BSC_FD_READ)) |
| 804 | return 0; |
| 805 | |
| 806 | switch (fd->priv_nr) { |
| 807 | case 0: |
| 808 | rc = gtp_decaps0(sgi->gsn); |
| 809 | break; |
| 810 | case 1: |
| 811 | rc = gtp_decaps1c(sgi->gsn); |
| 812 | break; |
| 813 | case 2: |
| 814 | rc = gtp_decaps1u(sgi->gsn); |
| 815 | break; |
Harald Welte | cd4dd4d | 2010-05-18 17:20:49 +0200 | [diff] [blame] | 816 | default: |
| 817 | rc = -EINVAL; |
| 818 | break; |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 819 | } |
| 820 | return rc; |
| 821 | } |
| 822 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 823 | static void sgsn_gtp_tmr_start(struct sgsn_instance *sgi) |
| 824 | { |
Harald Welte | b4a3129 | 2010-05-18 18:24:53 +0200 | [diff] [blame] | 825 | struct timeval next; |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 826 | |
| 827 | /* Retrieve next retransmission as struct timeval */ |
| 828 | gtp_retranstimeout(sgi->gsn, &next); |
| 829 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 830 | /* re-schedule the timer */ |
Pablo Neira Ayuso | bf540cb | 2011-05-06 12:11:06 +0200 | [diff] [blame] | 831 | osmo_timer_schedule(&sgi->gtp_timer, next.tv_sec, next.tv_usec/1000); |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 832 | } |
| 833 | |
| 834 | /* timer callback for libgtp retransmissions and ping */ |
| 835 | static void sgsn_gtp_tmr_cb(void *data) |
| 836 | { |
| 837 | struct sgsn_instance *sgi = data; |
| 838 | |
| 839 | /* Do all the retransmissions as needed */ |
| 840 | gtp_retrans(sgi->gsn); |
| 841 | |
| 842 | sgsn_gtp_tmr_start(sgi); |
| 843 | } |
| 844 | |
| 845 | int sgsn_gtp_init(struct sgsn_instance *sgi) |
| 846 | { |
| 847 | int rc; |
| 848 | struct gsn_t *gsn; |
| 849 | |
| 850 | rc = gtp_new(&sgi->gsn, sgi->cfg.gtp_statedir, |
| 851 | &sgi->cfg.gtp_listenaddr.sin_addr, GTP_MODE_SGSN); |
| 852 | if (rc) { |
| 853 | LOGP(DGPRS, LOGL_ERROR, "Failed to create GTP: %d\n", rc); |
| 854 | return rc; |
| 855 | } |
Max | f89be66 | 2017-10-27 18:56:34 +0200 | [diff] [blame] | 856 | LOGP(DGPRS, LOGL_NOTICE, "Created GTP on %s\n", inet_ntoa(sgi->cfg.gtp_listenaddr.sin_addr)); |
| 857 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 858 | gsn = sgi->gsn; |
| 859 | |
Max | 6f24402 | 2017-10-20 14:28:04 +0200 | [diff] [blame] | 860 | if (gsn->mode != GTP_MODE_SGSN) |
| 861 | return -EINVAL; |
| 862 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 863 | sgi->gtp_fd0.fd = gsn->fd0; |
| 864 | sgi->gtp_fd0.priv_nr = 0; |
| 865 | sgi->gtp_fd0.data = sgi; |
Harald Welte | 322a5ee | 2010-05-18 13:13:11 +0200 | [diff] [blame] | 866 | sgi->gtp_fd0.when = BSC_FD_READ; |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 867 | sgi->gtp_fd0.cb = sgsn_gtp_fd_cb; |
Pablo Neira Ayuso | 4db9299 | 2011-05-06 12:11:23 +0200 | [diff] [blame] | 868 | rc = osmo_fd_register(&sgi->gtp_fd0); |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 869 | if (rc < 0) |
| 870 | return rc; |
| 871 | |
| 872 | sgi->gtp_fd1c.fd = gsn->fd1c; |
| 873 | sgi->gtp_fd1c.priv_nr = 1; |
| 874 | sgi->gtp_fd1c.data = sgi; |
Harald Welte | 322a5ee | 2010-05-18 13:13:11 +0200 | [diff] [blame] | 875 | sgi->gtp_fd1c.when = BSC_FD_READ; |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 876 | sgi->gtp_fd1c.cb = sgsn_gtp_fd_cb; |
Holger Hans Peter Freyther | 3a708af | 2013-07-04 18:39:02 +0200 | [diff] [blame] | 877 | rc = osmo_fd_register(&sgi->gtp_fd1c); |
| 878 | if (rc < 0) { |
| 879 | osmo_fd_unregister(&sgi->gtp_fd0); |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 880 | return rc; |
Holger Hans Peter Freyther | 3a708af | 2013-07-04 18:39:02 +0200 | [diff] [blame] | 881 | } |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 882 | |
| 883 | sgi->gtp_fd1u.fd = gsn->fd1u; |
| 884 | sgi->gtp_fd1u.priv_nr = 2; |
| 885 | sgi->gtp_fd1u.data = sgi; |
Harald Welte | 322a5ee | 2010-05-18 13:13:11 +0200 | [diff] [blame] | 886 | sgi->gtp_fd1u.when = BSC_FD_READ; |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 887 | sgi->gtp_fd1u.cb = sgsn_gtp_fd_cb; |
Holger Hans Peter Freyther | 3a708af | 2013-07-04 18:39:02 +0200 | [diff] [blame] | 888 | rc = osmo_fd_register(&sgi->gtp_fd1u); |
| 889 | if (rc < 0) { |
| 890 | osmo_fd_unregister(&sgi->gtp_fd0); |
| 891 | osmo_fd_unregister(&sgi->gtp_fd1c); |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 892 | return rc; |
Holger Hans Peter Freyther | 3a708af | 2013-07-04 18:39:02 +0200 | [diff] [blame] | 893 | } |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 894 | |
| 895 | /* Start GTP re-transmission timer */ |
Pablo Neira Ayuso | 5121576 | 2017-05-08 20:57:52 +0200 | [diff] [blame] | 896 | osmo_timer_setup(&sgi->gtp_timer, sgsn_gtp_tmr_cb, sgi); |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 897 | sgsn_gtp_tmr_start(sgi); |
| 898 | |
| 899 | /* Register callbackcs with libgtp */ |
| 900 | gtp_set_cb_delete_context(gsn, cb_delete_context); |
| 901 | gtp_set_cb_conf(gsn, cb_conf); |
Pau Espin Pedrol | ef6d78f | 2018-07-17 15:56:53 +0200 | [diff] [blame] | 902 | gtp_set_cb_recovery2(gsn, cb_recovery2); |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 903 | gtp_set_cb_data_ind(gsn, cb_data_ind); |
| 904 | gtp_set_cb_unsup_ind(gsn, cb_unsup_ind); |
| 905 | gtp_set_cb_extheader_ind(gsn, cb_extheader_ind); |
| 906 | |
| 907 | return 0; |
| 908 | } |