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> |
Alexander Couzens | 030824e | 2019-09-17 01:43:50 +0200 | [diff] [blame] | 48 | #include <osmocom/sgsn/gprs_gb.h> |
Neels Hofmeyr | 396f2e6 | 2017-09-04 15:13:25 +0200 | [diff] [blame] | 49 | #include <osmocom/sgsn/gprs_llc.h> |
| 50 | #include <osmocom/sgsn/gprs_sgsn.h> |
| 51 | #include <osmocom/sgsn/gprs_gmm.h> |
Pau Espin Pedrol | 35f0e66 | 2019-09-02 18:27:27 +0200 | [diff] [blame] | 52 | #include <osmocom/sgsn/gprs_sm.h> |
Neels Hofmeyr | 396f2e6 | 2017-09-04 15:13:25 +0200 | [diff] [blame] | 53 | #include <osmocom/sgsn/gprs_subscriber.h> |
| 54 | #include <osmocom/sgsn/gprs_sndcp.h> |
Pau Espin Pedrol | 6dfb5fe | 2019-08-29 17:21:00 +0200 | [diff] [blame] | 55 | #include <osmocom/sgsn/gprs_ranap.h> |
Pau Espin Pedrol | 31c4657 | 2019-09-02 16:45:27 +0200 | [diff] [blame] | 56 | #include <osmocom/sgsn/gprs_gmm_fsm.h> |
Alexander Couzens | 4d1d2e7 | 2019-10-08 17:31:10 +0200 | [diff] [blame] | 57 | #include <osmocom/sgsn/gprs_mm_state_gb_fsm.h> |
Pau Espin Pedrol | e5c8998 | 2021-05-03 18:16:42 +0200 | [diff] [blame^] | 58 | #include <osmocom/sgsn/gtp_mme.h> |
| 59 | #include <osmocom/sgsn/sgsn_rim.h> |
Daniel Willmann | 6292c8d | 2016-05-21 17:35:57 +0200 | [diff] [blame] | 60 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 61 | #include <gtp.h> |
| 62 | #include <pdp.h> |
| 63 | |
Harald Welte | 686f4d6 | 2016-11-01 03:32:50 +0100 | [diff] [blame] | 64 | /* TS 23.003: The MSISDN shall take the dummy MSISDN value composed of |
| 65 | * 15 digits set to 0 (encoded as an E.164 international number) when |
| 66 | * the MSISDN is not available in messages in which the presence of the |
| 67 | * MSISDN parameter */ |
| 68 | static const uint8_t dummy_msisdn[] = |
| 69 | { 0x91, /* No extension, international, E.164 */ |
| 70 | 0, 0, 0, 0, 0, 0, 0, /* 14 digits of zeroes */ |
| 71 | 0xF0 /* 15th digit of zero + padding */ }; |
| 72 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 73 | const struct value_string gtp_cause_strs[] = { |
| 74 | { GTPCAUSE_REQ_IMSI, "Request IMSI" }, |
| 75 | { GTPCAUSE_REQ_IMEI, "Request IMEI" }, |
| 76 | { GTPCAUSE_REQ_IMSI_IMEI, "Request IMSI and IMEI" }, |
| 77 | { GTPCAUSE_NO_ID_NEEDED, "No identity needed" }, |
| 78 | { GTPCAUSE_MS_REFUSES_X, "MS refuses" }, |
| 79 | { GTPCAUSE_MS_NOT_RESP_X, "MS is not GPRS responding" }, |
| 80 | { GTPCAUSE_ACC_REQ, "Request accepted" }, |
| 81 | { GTPCAUSE_NON_EXIST, "Non-existent" }, |
| 82 | { GTPCAUSE_INVALID_MESSAGE, "Invalid message format" }, |
| 83 | { GTPCAUSE_IMSI_NOT_KNOWN, "IMSI not known" }, |
| 84 | { GTPCAUSE_MS_DETACHED, "MS is GPRS detached" }, |
| 85 | { GTPCAUSE_MS_NOT_RESP, "MS is not GPRS responding" }, |
| 86 | { GTPCAUSE_MS_REFUSES, "MS refuses" }, |
| 87 | { GTPCAUSE_NO_RESOURCES, "No resources available" }, |
| 88 | { GTPCAUSE_NOT_SUPPORTED, "Service not supported" }, |
| 89 | { GTPCAUSE_MAN_IE_INCORRECT, "Mandatory IE incorrect" }, |
| 90 | { GTPCAUSE_MAN_IE_MISSING, "Mandatory IE missing" }, |
| 91 | { GTPCAUSE_OPT_IE_INCORRECT, "Optional IE incorrect" }, |
| 92 | { GTPCAUSE_SYS_FAIL, "System failure" }, |
| 93 | { GTPCAUSE_ROAMING_REST, "Roaming restrictions" }, |
| 94 | { GTPCAUSE_PTIMSI_MISMATCH, "P-TMSI Signature mismatch" }, |
| 95 | { GTPCAUSE_CONN_SUSP, "GPRS connection suspended" }, |
| 96 | { GTPCAUSE_AUTH_FAIL, "Authentication failure" }, |
| 97 | { GTPCAUSE_USER_AUTH_FAIL, "User authentication failed" }, |
| 98 | { GTPCAUSE_CONTEXT_NOT_FOUND, "Context not found" }, |
| 99 | { GTPCAUSE_ADDR_OCCUPIED, "All dynamic PDP addresses occupied" }, |
| 100 | { GTPCAUSE_NO_MEMORY, "No memory is available" }, |
| 101 | { GTPCAUSE_RELOC_FAIL, "Relocation failure" }, |
| 102 | { GTPCAUSE_UNKNOWN_MAN_EXTHEADER, "Unknown mandatory ext. header" }, |
| 103 | { GTPCAUSE_SEM_ERR_TFT, "Semantic error in TFT operation" }, |
| 104 | { GTPCAUSE_SYN_ERR_TFT, "Syntactic error in TFT operation" }, |
| 105 | { GTPCAUSE_SEM_ERR_FILTER, "Semantic errors in packet filter" }, |
| 106 | { GTPCAUSE_SYN_ERR_FILTER, "Syntactic errors in packet filter" }, |
| 107 | { GTPCAUSE_MISSING_APN, "Missing or unknown APN" }, |
| 108 | { GTPCAUSE_UNKNOWN_PDP, "Unknown PDP address or PDP type" }, |
| 109 | { 0, NULL } |
| 110 | }; |
| 111 | |
Harald Welte | 6add7c2 | 2010-07-02 22:47:39 +0200 | [diff] [blame] | 112 | /* Generate the GTP IMSI IE according to 09.60 Section 7.9.2 */ |
| 113 | static uint64_t imsi_str2gtp(char *str) |
| 114 | { |
| 115 | uint64_t imsi64 = 0; |
| 116 | unsigned int n; |
| 117 | unsigned int imsi_len = strlen(str); |
| 118 | |
| 119 | if (imsi_len > 16) { |
| 120 | LOGP(DGPRS, LOGL_NOTICE, "IMSI length > 16 not supported!\n"); |
| 121 | return 0; |
| 122 | } |
| 123 | |
| 124 | for (n = 0; n < 16; n++) { |
| 125 | uint64_t val; |
| 126 | if (n < imsi_len) |
| 127 | val = (str[n]-'0') & 0xf; |
| 128 | else |
| 129 | val = 0xf; |
| 130 | imsi64 |= (val << (n*4)); |
| 131 | } |
| 132 | return imsi64; |
| 133 | } |
| 134 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 135 | /* generate a PDP context based on the IE's from the 04.08 message, |
| 136 | * and send the GTP create pdp context request to the GGSN */ |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 137 | 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] | 138 | struct sgsn_mm_ctx *mmctx, |
| 139 | uint16_t nsapi, |
| 140 | struct tlv_parsed *tp) |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 141 | { |
Holger Hans Peter Freyther | 072bee5 | 2015-05-17 17:36:23 +0200 | [diff] [blame] | 142 | struct gprs_ra_id raid; |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 143 | struct sgsn_pdp_ctx *pctx; |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 144 | struct pdp_t *pdp; |
Harald Welte | 6add7c2 | 2010-07-02 22:47:39 +0200 | [diff] [blame] | 145 | uint64_t imsi_ui64; |
Holger Hans Peter Freyther | 8cedded | 2015-04-23 11:33:35 -0400 | [diff] [blame] | 146 | size_t qos_len; |
| 147 | const uint8_t *qos; |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 148 | int rc; |
| 149 | |
Pau Espin Pedrol | a98fead | 2018-07-09 14:39:47 +0200 | [diff] [blame] | 150 | pctx = sgsn_pdp_ctx_alloc(mmctx, ggsn, nsapi); |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 151 | if (!pctx) { |
| 152 | LOGP(DGPRS, LOGL_ERROR, "Couldn't allocate PDP Ctx\n"); |
| 153 | return NULL; |
| 154 | } |
| 155 | |
Harald Welte | 6add7c2 | 2010-07-02 22:47:39 +0200 | [diff] [blame] | 156 | imsi_ui64 = imsi_str2gtp(mmctx->imsi); |
| 157 | |
Pau Espin Pedrol | f7afd20 | 2019-05-31 17:02:31 +0200 | [diff] [blame] | 158 | rc = gtp_pdp_newpdp(ggsn->gsn, &pdp, imsi_ui64, nsapi, NULL); |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 159 | if (rc) { |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 160 | LOGP(DGPRS, LOGL_ERROR, "Out of libgtp PDP Contexts\n"); |
| 161 | return NULL; |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 162 | } |
Harald Welte | bb1c805 | 2010-06-03 06:38:38 +0200 | [diff] [blame] | 163 | pdp->priv = pctx; |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 164 | pctx->lib = pdp; |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 165 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 166 | //pdp->peer = /* sockaddr_in of GGSN (receive) */ |
| 167 | //pdp->ipif = /* not used by library */ |
| 168 | pdp->version = ggsn->gtp_version; |
| 169 | pdp->hisaddr0 = ggsn->remote_addr; |
| 170 | pdp->hisaddr1 = ggsn->remote_addr; |
| 171 | //pdp->cch_pdp = 512; /* Charging Flat Rate */ |
Keith | 6d92f14 | 2020-09-21 00:09:30 +0200 | [diff] [blame] | 172 | pdp->radio_pri = 0x4; |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 173 | |
Holger Hans Peter Freyther | 0f7a279 | 2015-05-22 10:03:21 +0800 | [diff] [blame] | 174 | /* MS provided APN, subscription was verified by the caller */ |
| 175 | pdp->selmode = 0xFC | 0x00; |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 176 | |
| 177 | /* IMSI, TEID/TEIC, FLLU/FLLC, TID, NSAPI set in pdp_newpdp */ |
Max | a3b73e9 | 2017-09-27 15:08:17 +0200 | [diff] [blame] | 178 | LOGPDPCTXP(LOGL_NOTICE, pctx, "Create PDP Context\n"); |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 179 | |
Holger Hans Peter Freyther | 9ba273d | 2015-04-23 09:53:53 -0400 | [diff] [blame] | 180 | /* Put the MSISDN in case we have it */ |
Harald Welte | 686f4d6 | 2016-11-01 03:32:50 +0100 | [diff] [blame] | 181 | if (mmctx->subscr && mmctx->subscr->sgsn_data->msisdn_len) { |
Max | ad2e18f | 2018-12-10 15:30:52 +0100 | [diff] [blame] | 182 | pdp->msisdn.l = OSMO_MIN(mmctx->subscr->sgsn_data->msisdn_len, sizeof(pdp->msisdn.v)); |
Holger Hans Peter Freyther | 9ba273d | 2015-04-23 09:53:53 -0400 | [diff] [blame] | 183 | memcpy(pdp->msisdn.v, mmctx->subscr->sgsn_data->msisdn, |
| 184 | pdp->msisdn.l); |
Harald Welte | 686f4d6 | 2016-11-01 03:32:50 +0100 | [diff] [blame] | 185 | } else { |
| 186 | /* use the dummy 15-digits-zero MSISDN value */ |
| 187 | pdp->msisdn.l = sizeof(dummy_msisdn); |
| 188 | memcpy(pdp->msisdn.v, dummy_msisdn, pdp->msisdn.l); |
Holger Hans Peter Freyther | 9ba273d | 2015-04-23 09:53:53 -0400 | [diff] [blame] | 189 | } |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 190 | |
| 191 | /* End User Address from GMM requested PDP address */ |
| 192 | pdp->eua.l = TLVP_LEN(tp, OSMO_IE_GSM_REQ_PDP_ADDR); |
| 193 | if (pdp->eua.l > sizeof(pdp->eua.v)) |
| 194 | pdp->eua.l = sizeof(pdp->eua.v); |
| 195 | memcpy(pdp->eua.v, TLVP_VAL(tp, OSMO_IE_GSM_REQ_PDP_ADDR), |
| 196 | pdp->eua.l); |
| 197 | /* Highest 4 bits of first byte need to be set to 1, otherwise |
| 198 | * the IE is identical with the 04.08 PDP Address IE */ |
| 199 | pdp->eua.v[0] |= 0xf0; |
| 200 | |
| 201 | /* APN name from GMM */ |
Pau Espin Pedrol | faeea34 | 2018-07-17 18:08:54 +0200 | [diff] [blame] | 202 | if (TLVP_PRESENT(tp, GSM48_IE_GSM_APN)) { |
| 203 | pdp->apn_use.l = TLVP_LEN(tp, GSM48_IE_GSM_APN); |
| 204 | if (pdp->apn_use.l > sizeof(pdp->apn_use.v)) |
| 205 | pdp->apn_use.l = sizeof(pdp->apn_use.v); |
| 206 | memcpy(pdp->apn_use.v, TLVP_VAL(tp, GSM48_IE_GSM_APN), pdp->apn_use.l); |
| 207 | } else { |
| 208 | pdp->apn_use.l = 0; |
| 209 | } |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 210 | |
| 211 | /* Protocol Configuration Options from GMM */ |
Pau Espin Pedrol | faeea34 | 2018-07-17 18:08:54 +0200 | [diff] [blame] | 212 | if (TLVP_PRESENT(tp, GSM48_IE_GSM_PROTO_CONF_OPT)) { |
| 213 | pdp->pco_req.l = TLVP_LEN(tp, GSM48_IE_GSM_PROTO_CONF_OPT); |
| 214 | if (pdp->pco_req.l > sizeof(pdp->pco_req.v)) |
| 215 | pdp->pco_req.l = sizeof(pdp->pco_req.v); |
| 216 | memcpy(pdp->pco_req.v, TLVP_VAL(tp, GSM48_IE_GSM_PROTO_CONF_OPT), |
| 217 | pdp->pco_req.l); |
| 218 | } else { |
| 219 | pdp->pco_req.l = 0; |
| 220 | } |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 221 | |
Holger Hans Peter Freyther | 8cedded | 2015-04-23 11:33:35 -0400 | [diff] [blame] | 222 | /* QoS options from GMM or remote */ |
| 223 | if (TLVP_LEN(tp, OSMO_IE_GSM_SUB_QOS) > 0) { |
| 224 | qos_len = TLVP_LEN(tp, OSMO_IE_GSM_SUB_QOS); |
| 225 | qos = TLVP_VAL(tp, OSMO_IE_GSM_SUB_QOS); |
| 226 | } else { |
| 227 | qos_len = TLVP_LEN(tp, OSMO_IE_GSM_REQ_QOS); |
| 228 | qos = TLVP_VAL(tp, OSMO_IE_GSM_REQ_QOS); |
| 229 | } |
| 230 | |
Holger Hans Peter Freyther | 4bd931f | 2015-04-23 11:50:41 -0400 | [diff] [blame] | 231 | if (qos_len <= 3) { |
| 232 | pdp->qos_req.l = qos_len + 1; |
| 233 | if (pdp->qos_req.l > sizeof(pdp->qos_req.v)) |
| 234 | pdp->qos_req.l = sizeof(pdp->qos_req.v); |
| 235 | pdp->qos_req.v[0] = 0; /* Allocation/Retention policy */ |
| 236 | memcpy(&pdp->qos_req.v[1], qos, pdp->qos_req.l - 1); |
| 237 | } else { |
| 238 | pdp->qos_req.l = qos_len; |
| 239 | if (pdp->qos_req.l > sizeof(pdp->qos_req.v)) |
| 240 | pdp->qos_req.l = sizeof(pdp->qos_req.v); |
| 241 | memcpy(pdp->qos_req.v, qos, pdp->qos_req.l); |
| 242 | } |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 243 | |
Holger Hans Peter Freyther | 5db6857 | 2017-07-09 13:18:17 +0200 | [diff] [blame] | 244 | /* charging characteristics if present */ |
Holger Hans Peter Freyther | 9f30e40 | 2017-07-20 10:13:28 +0200 | [diff] [blame] | 245 | if (TLVP_LEN(tp, OSMO_IE_GSM_CHARG_CHAR) >= sizeof(pdp->cch_pdp)) |
| 246 | 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] | 247 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 248 | /* SGSN address for control plane */ |
Harald Welte | 61ca7ce | 2010-06-02 23:17:33 +0200 | [diff] [blame] | 249 | pdp->gsnlc.l = sizeof(sgsn->cfg.gtp_listenaddr.sin_addr); |
| 250 | memcpy(pdp->gsnlc.v, &sgsn->cfg.gtp_listenaddr.sin_addr, |
| 251 | sizeof(sgsn->cfg.gtp_listenaddr.sin_addr)); |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 252 | |
Daniel Willmann | 6292c8d | 2016-05-21 17:35:57 +0200 | [diff] [blame] | 253 | /* SGSN address for user plane |
| 254 | * Default to the control plane addr for now. If we are connected to a |
| 255 | * hnbgw via IuPS we'll need to send a PDP context update with the |
| 256 | * correct IP address after the RAB Assignment is complete */ |
Harald Welte | 61ca7ce | 2010-06-02 23:17:33 +0200 | [diff] [blame] | 257 | pdp->gsnlu.l = sizeof(sgsn->cfg.gtp_listenaddr.sin_addr); |
| 258 | memcpy(pdp->gsnlu.v, &sgsn->cfg.gtp_listenaddr.sin_addr, |
| 259 | sizeof(sgsn->cfg.gtp_listenaddr.sin_addr)); |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 260 | |
Harald Welte | a4feac2 | 2017-08-01 19:08:21 +0200 | [diff] [blame] | 261 | /* Encode RAT Type according to TS 29.060 7.7.50 */ |
| 262 | pdp->rattype.l = 1; |
| 263 | if (mmctx->ran_type == MM_CTX_T_UTRAN_Iu) |
| 264 | pdp->rattype.v[0] = 1; |
| 265 | else |
| 266 | pdp->rattype.v[0] = 2; |
| 267 | pdp->rattype_given = 1; |
| 268 | |
| 269 | /* Include RAI and ULI all the time */ |
Holger Hans Peter Freyther | 22093ef | 2015-05-12 21:46:58 +0200 | [diff] [blame] | 270 | pdp->rai_given = 1; |
| 271 | pdp->rai.l = 6; |
Harald Welte | a4feac2 | 2017-08-01 19:08:21 +0200 | [diff] [blame] | 272 | |
| 273 | /* Routing Area Identifier with LAC and RAC fixed values, as |
| 274 | * requested in 29.006 7.3.1 */ |
Holger Hans Peter Freyther | 072bee5 | 2015-05-17 17:36:23 +0200 | [diff] [blame] | 275 | raid = mmctx->ra; |
| 276 | raid.lac = 0xFFFE; |
| 277 | raid.rac = 0xFF; |
Max | 25c65c3 | 2018-01-08 14:43:53 +0100 | [diff] [blame] | 278 | 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] | 279 | |
Harald Welte | a4feac2 | 2017-08-01 19:08:21 +0200 | [diff] [blame] | 280 | /* Encode User Location Information accordint to TS 29.060 7.7.51 */ |
| 281 | pdp->userloc_given = 1; |
| 282 | pdp->userloc.l = 8; |
Harald Welte | 42e8f21 | 2016-05-02 08:34:57 +0200 | [diff] [blame] | 283 | switch (mmctx->ran_type) { |
| 284 | case MM_CTX_T_GERAN_Gb: |
Pau Espin Pedrol | 05140b8 | 2019-08-13 18:38:24 +0200 | [diff] [blame] | 285 | #if 0 |
Harald Welte | 42e8f21 | 2016-05-02 08:34:57 +0200 | [diff] [blame] | 286 | case MM_CTX_T_GERAN_Iu: |
Pau Espin Pedrol | 05140b8 | 2019-08-13 18:38:24 +0200 | [diff] [blame] | 287 | #endif |
Harald Welte | 42e8f21 | 2016-05-02 08:34:57 +0200 | [diff] [blame] | 288 | pdp->rattype.v[0] = 2; |
| 289 | /* User Location Information */ |
| 290 | pdp->userloc_given = 1; |
| 291 | pdp->userloc.l = 8; |
| 292 | pdp->userloc.v[0] = 0; /* CGI for GERAN */ |
| 293 | bssgp_create_cell_id(&pdp->userloc.v[1], &mmctx->ra, mmctx->gb.cell_id); |
| 294 | break; |
| 295 | case MM_CTX_T_UTRAN_Iu: |
Harald Welte | a4feac2 | 2017-08-01 19:08:21 +0200 | [diff] [blame] | 296 | pdp->userloc.v[0] = 1; /* SAI for UTRAN */ |
| 297 | /* SAI is like CGI but with SAC instead of CID, so we can abuse this function */ |
| 298 | 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] | 299 | break; |
| 300 | } |
Holger Hans Peter Freyther | 6ddb6ac | 2015-05-12 22:00:22 +0200 | [diff] [blame] | 301 | |
Holger Hans Peter Freyther | d6900df | 2015-05-12 22:20:05 +0200 | [diff] [blame] | 302 | /* include the IMEI(SV) */ |
| 303 | pdp->imeisv_given = 1; |
| 304 | gsm48_encode_bcd_number(&pdp->imeisv.v[0], 8, 0, mmctx->imei); |
| 305 | pdp->imeisv.l = pdp->imeisv.v[0]; |
| 306 | memmove(&pdp->imeisv.v[0], &pdp->imeisv.v[1], 8); |
| 307 | |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 308 | /* change pdp state to 'requested' */ |
| 309 | pctx->state = PDP_STATE_CR_REQ; |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 310 | |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 311 | rc = gtp_create_context_req(ggsn->gsn, pdp, pctx); |
| 312 | /* FIXME */ |
| 313 | |
| 314 | return pctx; |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 315 | } |
| 316 | |
Pau Espin Pedrol | 60581ae | 2020-10-23 13:03:58 +0200 | [diff] [blame] | 317 | /* SGSN wants to delete a PDP context, send first DeleteCtxReq on the GTP side, |
| 318 | then upon DeleteCtx ACK it will send DeactPdpAcc to the MS if still |
| 319 | connected. */ |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 320 | int sgsn_delete_pdp_ctx(struct sgsn_pdp_ctx *pctx) |
| 321 | { |
Pau Espin Pedrol | 03dc773 | 2018-07-17 12:42:12 +0200 | [diff] [blame] | 322 | LOGPDPCTXP(LOGL_INFO, pctx, "Delete PDP Context\n"); |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 323 | |
Pau Espin Pedrol | 60581ae | 2020-10-23 13:03:58 +0200 | [diff] [blame] | 324 | OSMO_ASSERT(pctx->ggsn); |
| 325 | OSMO_ASSERT(pctx->lib); |
| 326 | |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 327 | /* FIXME: decide if we need teardown or not ! */ |
Pau Espin Pedrol | 03dc773 | 2018-07-17 12:42:12 +0200 | [diff] [blame] | 328 | return gtp_delete_context_req2(pctx->ggsn->gsn, pctx->lib, pctx, 1); |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 329 | } |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 330 | |
| 331 | struct cause_map { |
| 332 | uint8_t cause_in; |
| 333 | uint8_t cause_out; |
| 334 | }; |
| 335 | |
| 336 | static uint8_t cause_map(const struct cause_map *map, uint8_t in, uint8_t deflt) |
| 337 | { |
| 338 | const struct cause_map *m; |
| 339 | |
| 340 | for (m = map; m->cause_in && m->cause_out; m++) { |
| 341 | if (m->cause_in == in) |
| 342 | return m->cause_out; |
| 343 | } |
| 344 | return deflt; |
| 345 | } |
| 346 | |
| 347 | /* how do we map from gtp cause to SM cause */ |
| 348 | static const struct cause_map gtp2sm_cause_map[] = { |
| 349 | { GTPCAUSE_NO_RESOURCES, GSM_CAUSE_INSUFF_RSRC }, |
| 350 | { GTPCAUSE_NOT_SUPPORTED, GSM_CAUSE_SERV_OPT_NOTSUPP }, |
| 351 | { GTPCAUSE_MAN_IE_INCORRECT, GSM_CAUSE_INV_MAND_INFO }, |
| 352 | { GTPCAUSE_MAN_IE_MISSING, GSM_CAUSE_INV_MAND_INFO }, |
| 353 | { GTPCAUSE_OPT_IE_INCORRECT, GSM_CAUSE_PROTO_ERR_UNSPEC }, |
| 354 | { GTPCAUSE_SYS_FAIL, GSM_CAUSE_NET_FAIL }, |
| 355 | { GTPCAUSE_ROAMING_REST, GSM_CAUSE_REQ_SERV_OPT_NOTSUB }, |
| 356 | { GTPCAUSE_PTIMSI_MISMATCH, GSM_CAUSE_PROTO_ERR_UNSPEC }, |
| 357 | { GTPCAUSE_CONN_SUSP, GSM_CAUSE_PROTO_ERR_UNSPEC }, |
| 358 | { GTPCAUSE_AUTH_FAIL, GSM_CAUSE_AUTH_FAILED }, |
| 359 | { GTPCAUSE_USER_AUTH_FAIL, GSM_CAUSE_ACT_REJ_GGSN }, |
| 360 | { GTPCAUSE_CONTEXT_NOT_FOUND, GSM_CAUSE_PROTO_ERR_UNSPEC }, |
| 361 | { GTPCAUSE_ADDR_OCCUPIED, GSM_CAUSE_INSUFF_RSRC }, |
| 362 | { GTPCAUSE_NO_MEMORY, GSM_CAUSE_INSUFF_RSRC }, |
| 363 | { GTPCAUSE_RELOC_FAIL, GSM_CAUSE_PROTO_ERR_UNSPEC }, |
| 364 | { GTPCAUSE_UNKNOWN_MAN_EXTHEADER, GSM_CAUSE_PROTO_ERR_UNSPEC }, |
| 365 | { GTPCAUSE_MISSING_APN, GSM_CAUSE_MISSING_APN }, |
| 366 | { GTPCAUSE_UNKNOWN_PDP, GSM_CAUSE_UNKNOWN_PDP }, |
| 367 | { 0, 0 } |
| 368 | }; |
| 369 | |
Pau Espin Pedrol | 6dfb5fe | 2019-08-29 17:21:00 +0200 | [diff] [blame] | 370 | int send_act_pdp_cont_acc(struct sgsn_pdp_ctx *pctx) |
Daniel Willmann | 62ff384 | 2016-05-21 01:40:19 +0200 | [diff] [blame] | 371 | { |
| 372 | struct sgsn_signal_data sig_data; |
Philipp | f1f3436 | 2016-08-26 17:00:21 +0200 | [diff] [blame] | 373 | int rc; |
| 374 | struct gprs_llc_lle *lle; |
Daniel Willmann | 62ff384 | 2016-05-21 01:40:19 +0200 | [diff] [blame] | 375 | |
| 376 | /* Inform others about it */ |
| 377 | memset(&sig_data, 0, sizeof(sig_data)); |
| 378 | sig_data.pdp = pctx; |
| 379 | osmo_signal_dispatch(SS_SGSN, S_SGSN_PDP_ACT, &sig_data); |
| 380 | |
| 381 | /* Send PDP CTX ACT to MS */ |
Philipp | f1f3436 | 2016-08-26 17:00:21 +0200 | [diff] [blame] | 382 | rc = gsm48_tx_gsm_act_pdp_acc(pctx); |
Harald Welte | 7e5bb62 | 2016-09-28 08:20:58 +0800 | [diff] [blame] | 383 | if (rc < 0) |
Philipp | f1f3436 | 2016-08-26 17:00:21 +0200 | [diff] [blame] | 384 | return rc; |
| 385 | |
Neels Hofmeyr | c6a44bb | 2016-09-28 13:44:39 +0200 | [diff] [blame] | 386 | if (pctx->mm->ran_type == MM_CTX_T_GERAN_Gb) { |
| 387 | /* Send SNDCP XID to MS */ |
| 388 | lle = &pctx->mm->gb.llme->lle[pctx->sapi]; |
| 389 | rc = sndcp_sn_xid_req(lle,pctx->nsapi); |
| 390 | if (rc < 0) |
| 391 | return rc; |
| 392 | } |
Philipp | f1f3436 | 2016-08-26 17:00:21 +0200 | [diff] [blame] | 393 | |
| 394 | return 0; |
Daniel Willmann | 62ff384 | 2016-05-21 01:40:19 +0200 | [diff] [blame] | 395 | } |
| 396 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 397 | /* The GGSN has confirmed the creation of a PDP Context */ |
| 398 | static int create_pdp_conf(struct pdp_t *pdp, void *cbp, int cause) |
| 399 | { |
Harald Welte | d193cb3 | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 400 | struct sgsn_pdp_ctx *pctx = cbp; |
Alexander Couzens | 8e16860 | 2018-09-18 16:51:56 +0200 | [diff] [blame] | 401 | uint8_t reject_cause = 0; |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 402 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 403 | 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] | 404 | cause, get_value_string(gtp_cause_strs, cause)); |
| 405 | |
Jacob Erlbeck | 99985b5 | 2014-10-13 10:32:00 +0200 | [diff] [blame] | 406 | if (!pctx->mm) { |
Alexander Couzens | 8e16860 | 2018-09-18 16:51:56 +0200 | [diff] [blame] | 407 | goto reject; |
Jacob Erlbeck | 99985b5 | 2014-10-13 10:32:00 +0200 | [diff] [blame] | 408 | } |
| 409 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 410 | /* Check for cause value if it was really successful */ |
| 411 | if (cause < 0) { |
| 412 | LOGP(DGPRS, LOGL_NOTICE, "Create PDP ctx req timed out\n"); |
Harald Welte | 1371f7d | 2010-06-01 11:52:41 +0200 | [diff] [blame] | 413 | if (pdp && pdp->version == 1) { |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 414 | pdp->version = 0; |
Harald Welte | 8fc1a46 | 2010-05-17 00:53:10 +0200 | [diff] [blame] | 415 | gtp_create_context_req(sgsn->gsn, pdp, cbp); |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 416 | return 0; |
| 417 | } else { |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 418 | reject_cause = GSM_CAUSE_NET_FAIL; |
| 419 | goto reject; |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 420 | } |
| 421 | } |
| 422 | |
| 423 | /* Check for cause value if it was really successful */ |
| 424 | if (cause != GTPCAUSE_ACC_REQ) { |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 425 | reject_cause = cause_map(gtp2sm_cause_map, cause, |
| 426 | GSM_CAUSE_ACT_REJ_GGSN); |
| 427 | goto reject; |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 428 | } |
| 429 | |
Daniel Willmann | f9f4387 | 2016-05-20 22:36:23 +0200 | [diff] [blame] | 430 | if (pctx->mm->ran_type == MM_CTX_T_GERAN_Gb) { |
| 431 | /* Activate the SNDCP layer */ |
| 432 | sndcp_sm_activate_ind(&pctx->mm->gb.llme->lle[pctx->sapi], pctx->nsapi); |
| 433 | return send_act_pdp_cont_acc(pctx); |
Daniel Willmann | 6b7b319 | 2016-05-21 00:53:42 +0200 | [diff] [blame] | 434 | } else if (pctx->mm->ran_type == MM_CTX_T_UTRAN_Iu) { |
| 435 | #ifdef BUILD_IU |
| 436 | /* Activate a radio bearer */ |
Neels Hofmeyr | 2188a77 | 2016-05-20 21:59:55 +0200 | [diff] [blame] | 437 | iu_rab_act_ps(pdp->nsapi, pctx); |
Daniel Willmann | 6b7b319 | 2016-05-21 00:53:42 +0200 | [diff] [blame] | 438 | return 0; |
| 439 | #else |
| 440 | return -ENOTSUP; |
| 441 | #endif |
Daniel Willmann | f9f4387 | 2016-05-20 22:36:23 +0200 | [diff] [blame] | 442 | } |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 443 | |
Neels Hofmeyr | 67933a1 | 2016-07-23 22:23:17 +0200 | [diff] [blame] | 444 | LOGP(DGPRS, LOGL_ERROR, "Unknown ran_type %d\n", |
| 445 | pctx->mm->ran_type); |
| 446 | reject_cause = GSM_CAUSE_PROTO_ERR_UNSPEC; |
| 447 | |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 448 | reject: |
Holger Hans Peter Freyther | 598e7b3 | 2013-07-30 08:45:29 +0200 | [diff] [blame] | 449 | /* |
| 450 | * In case of a timeout pdp will be NULL but we have a valid pointer |
| 451 | * in pctx->lib. For other rejects pctx->lib and pdp might be the |
| 452 | * same. |
| 453 | */ |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 454 | pctx->state = PDP_STATE_NONE; |
Holger Hans Peter Freyther | 598e7b3 | 2013-07-30 08:45:29 +0200 | [diff] [blame] | 455 | if (pctx->lib && pctx->lib != pdp) |
| 456 | pdp_freepdp(pctx->lib); |
| 457 | pctx->lib = NULL; |
| 458 | |
Harald Welte | 1371f7d | 2010-06-01 11:52:41 +0200 | [diff] [blame] | 459 | if (pdp) |
| 460 | pdp_freepdp(pdp); |
Alexander Couzens | 8e16860 | 2018-09-18 16:51:56 +0200 | [diff] [blame] | 461 | |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 462 | /* Send PDP CTX ACT REJ to MS */ |
Alexander Couzens | 8e16860 | 2018-09-18 16:51:56 +0200 | [diff] [blame] | 463 | if (pctx->mm) |
| 464 | gsm48_tx_gsm_act_pdp_rej(pctx->mm, pctx->ti, reject_cause, |
| 465 | 0, NULL); |
Harald Welte | f11b6d2 | 2010-06-02 10:09:50 +0200 | [diff] [blame] | 466 | sgsn_pdp_ctx_free(pctx); |
Harald Welte | 6abf94e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 467 | |
| 468 | return EOF; |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 469 | } |
| 470 | |
Daniel Willmann | 21b269f | 2016-05-11 12:43:47 +0200 | [diff] [blame] | 471 | void sgsn_pdp_upd_gtp_u(struct sgsn_pdp_ctx *pdp, void *addr, size_t alen) |
| 472 | { |
| 473 | pdp->lib->gsnlu.l = alen; |
| 474 | memcpy(pdp->lib->gsnlu.v, addr, alen); |
| 475 | gtp_update_context(pdp->ggsn->gsn, pdp->lib, pdp, &pdp->lib->hisaddr0); |
| 476 | } |
| 477 | |
Pau Espin Pedrol | fa12010 | 2018-07-09 20:37:47 +0200 | [diff] [blame] | 478 | void sgsn_ggsn_echo_req(struct sgsn_ggsn_ctx *ggc) |
| 479 | { |
Pau Espin Pedrol | 259e303 | 2019-08-28 16:54:16 +0200 | [diff] [blame] | 480 | LOGGGSN(ggc, LOGL_INFO, "GTP Tx Echo Request\n"); |
| 481 | gtp_echo_req(ggc->gsn, ggc->gtp_version, ggc, &ggc->remote_addr); |
Pau Espin Pedrol | fa12010 | 2018-07-09 20:37:47 +0200 | [diff] [blame] | 482 | } |
| 483 | |
Pau Espin Pedrol | e5c8998 | 2021-05-03 18:16:42 +0200 | [diff] [blame^] | 484 | int sgsn_mme_ran_info_req(struct sgsn_mme_ctx *mme, const struct bssgp_ran_information_pdu *pdu) |
| 485 | { |
| 486 | char ri_src_str[64], ri_dest_str[64]; |
| 487 | int ri_len; |
| 488 | struct msgb *msg; |
| 489 | struct bssgp_normal_hdr *bgph; |
| 490 | int rc; |
| 491 | uint8_t ri_buf[64]; |
| 492 | uint8_t *ri_ptr = &ri_buf[0]; |
| 493 | struct sockaddr_in sk_in = { |
| 494 | .sin_family = AF_INET, |
| 495 | .sin_port = htons(GTP1C_PORT), |
| 496 | .sin_addr = mme->remote_addr, |
| 497 | }; |
| 498 | |
| 499 | msg = bssgp_encode_rim_pdu(pdu); |
| 500 | if (!msg) { |
| 501 | LOGMME(mme, DRIM, LOGL_ERROR, "Tx GTP RAN Information Relay: failed to encode pdu\n"); |
| 502 | return -EINVAL; |
| 503 | } |
| 504 | bgph = (struct bssgp_normal_hdr *)msgb_bssgph(msg); |
| 505 | DEBUGP(DLBSSGP, "Tx GTP RAN Information Relay: RIM-PDU:%s, src=%s, dest=%s\n", |
| 506 | bssgp_pdu_str(bgph->pdu_type), |
| 507 | bssgp_rim_ri_name_buf(ri_src_str, sizeof(ri_src_str), &pdu->routing_info_src), |
| 508 | bssgp_rim_ri_name_buf(ri_dest_str, sizeof(ri_dest_str), &pdu->routing_info_dest)); |
| 509 | |
| 510 | if ((ri_len = bssgp_create_rim_ri(ri_ptr, &pdu->routing_info_dest)) < 0) { |
| 511 | ri_ptr = NULL; |
| 512 | ri_len = 0; |
| 513 | } |
| 514 | |
| 515 | rc = gtp_ran_info_relay_req(mme->sgsn->gsn, &sk_in, msgb_data(msg), msgb_length(msg), |
| 516 | ri_ptr, ri_len, pdu->routing_info_dest.discr); |
| 517 | msgb_free(msg); |
| 518 | return rc; |
| 519 | } |
| 520 | |
Pau Espin Pedrol | 8969db7 | 2021-04-21 20:12:44 +0200 | [diff] [blame] | 521 | /* Confirmation of a PDP Context Update */ |
| 522 | static int update_pdp_conf(struct pdp_t *pdp, void *cbp, int cause) |
| 523 | { |
| 524 | struct sgsn_pdp_ctx *pctx = cbp; |
| 525 | int rc; |
| 526 | |
| 527 | LOGPDPCTXP(LOGL_INFO, pctx, "Received Update PDP CTX CONF, cause=%d(%s)\n", |
| 528 | cause, get_value_string(gtp_cause_strs, cause)); |
| 529 | |
| 530 | /* 3GPP TS 29.060 "7.3.4": |
| 531 | * "If the SGSN receives an Update PDP Context Response with a Cause |
| 532 | * value other than "Request accepted", it shall abort the update of the |
| 533 | * PDP context."" |
| 534 | * "If the SGSN receives an Update PDP Context Response with |
| 535 | * a Cause value "Non-existent", it shall delete the PDP Context." |
| 536 | */ |
| 537 | if (cause != GTPCAUSE_NON_EXIST) |
| 538 | return 0; /* Nothing to do */ |
| 539 | |
| 540 | LOGPDPCTXP(LOGL_INFO, pctx, "PDP CTX we tried to update doesn't exist in " |
| 541 | "the GGSN anymore, deleting it locally.\n"); |
| 542 | |
| 543 | rc = gtp_freepdp(pctx->ggsn->gsn, pctx->lib); |
| 544 | /* related mmctx is torn down in cb_delete_context called by gtp_freepdp() */ |
| 545 | return rc; |
| 546 | } |
| 547 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 548 | /* Confirmation of a PDP Context Delete */ |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 549 | 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] | 550 | { |
Holger Hans Peter Freyther | b100895 | 2015-05-02 19:55:38 +0200 | [diff] [blame] | 551 | struct sgsn_signal_data sig_data; |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 552 | struct sgsn_pdp_ctx *pctx = cbp; |
Jacob Erlbeck | 99985b5 | 2014-10-13 10:32:00 +0200 | [diff] [blame] | 553 | int rc = 0; |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 554 | |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 555 | 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] | 556 | cause, get_value_string(gtp_cause_strs, cause)); |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 557 | |
Holger Hans Peter Freyther | b100895 | 2015-05-02 19:55:38 +0200 | [diff] [blame] | 558 | memset(&sig_data, 0, sizeof(sig_data)); |
| 559 | sig_data.pdp = pctx; |
| 560 | osmo_signal_dispatch(SS_SGSN, S_SGSN_PDP_DEACT, &sig_data); |
| 561 | |
Jacob Erlbeck | 99985b5 | 2014-10-13 10:32:00 +0200 | [diff] [blame] | 562 | if (pctx->mm) { |
Daniel Willmann | f9f4387 | 2016-05-20 22:36:23 +0200 | [diff] [blame] | 563 | if (pctx->mm->ran_type == MM_CTX_T_GERAN_Gb) { |
| 564 | /* Deactivate the SNDCP layer */ |
| 565 | 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] | 566 | } else { |
| 567 | #ifdef BUILD_IU |
| 568 | /* Deactivate radio bearer */ |
Neels Hofmeyr | a7a3947 | 2017-07-05 15:19:52 +0200 | [diff] [blame] | 569 | ranap_iu_rab_deact(pctx->mm->iu.ue_ctx, 1); |
Daniel Willmann | 7bc6986 | 2016-05-21 00:55:25 +0200 | [diff] [blame] | 570 | #else |
| 571 | return -ENOTSUP; |
| 572 | #endif |
Daniel Willmann | f9f4387 | 2016-05-20 22:36:23 +0200 | [diff] [blame] | 573 | } |
Harald Welte | 8fc60f0 | 2010-06-28 22:21:57 +0200 | [diff] [blame] | 574 | |
Jacob Erlbeck | 99985b5 | 2014-10-13 10:32:00 +0200 | [diff] [blame] | 575 | /* Confirm deactivation of PDP context to MS */ |
| 576 | rc = gsm48_tx_gsm_deact_pdp_acc(pctx); |
| 577 | } else { |
| 578 | LOGPDPCTXP(LOGL_NOTICE, pctx, |
| 579 | "Not deactivating SNDCP layer since the MM context " |
| 580 | "is not available\n"); |
| 581 | } |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 582 | |
| 583 | sgsn_pdp_ctx_free(pctx); |
| 584 | |
| 585 | return rc; |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 586 | } |
| 587 | |
| 588 | /* Confirmation of an GTP ECHO request */ |
Pau Espin Pedrol | 259e303 | 2019-08-28 16:54:16 +0200 | [diff] [blame] | 589 | static int echo_conf(void *cbp, bool timeout) |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 590 | { |
Pau Espin Pedrol | 259e303 | 2019-08-28 16:54:16 +0200 | [diff] [blame] | 591 | struct sgsn_ggsn_ctx *ggc = (struct sgsn_ggsn_ctx *)cbp; |
| 592 | if (timeout) { |
| 593 | LOGGGSN(ggc, LOGL_NOTICE, "GTP Echo Request timed out\n"); |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 594 | /* FIXME: if version == 1, retry with version 0 */ |
Pau Espin Pedrol | 259e303 | 2019-08-28 16:54:16 +0200 | [diff] [blame] | 595 | sgsn_ggsn_ctx_drop_all_pdp(ggc); |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 596 | } else { |
Pau Espin Pedrol | 259e303 | 2019-08-28 16:54:16 +0200 | [diff] [blame] | 597 | LOGGGSN(ggc, LOGL_INFO, "GTP Rx Echo Response\n"); |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 598 | } |
| 599 | return 0; |
| 600 | } |
| 601 | |
| 602 | /* Any message received by GGSN contains a recovery IE */ |
Pau Espin Pedrol | ef6d78f | 2018-07-17 15:56:53 +0200 | [diff] [blame] | 603 | 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] | 604 | { |
| 605 | struct sgsn_ggsn_ctx *ggsn; |
Pau Espin Pedrol | ef6d78f | 2018-07-17 15:56:53 +0200 | [diff] [blame] | 606 | struct sgsn_pdp_ctx *pctx = NULL; |
Pau Espin Pedrol | e77ee12 | 2018-02-12 17:40:33 +0100 | [diff] [blame] | 607 | |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 608 | ggsn = sgsn_ggsn_ctx_by_addr(&peer->sin_addr); |
| 609 | if (!ggsn) { |
Daniel Willmann | 4655314 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 610 | LOGP(DGPRS, LOGL_NOTICE, "Received Recovery IE for unknown GGSN\n"); |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 611 | return -EINVAL; |
| 612 | } |
| 613 | |
| 614 | if (ggsn->remote_restart_ctr == -1) { |
| 615 | /* First received ECHO RESPONSE, note the restart ctr */ |
| 616 | ggsn->remote_restart_ctr = recovery; |
| 617 | } else if (ggsn->remote_restart_ctr != recovery) { |
| 618 | /* counter has changed (GGSN restart): release all PDP */ |
Pau Espin Pedrol | ef6d78f | 2018-07-17 15:56:53 +0200 | [diff] [blame] | 619 | LOGP(DGPRS, LOGL_NOTICE, "GGSN recovery (%u->%u) pdp=%p, " |
| 620 | "releasing all%s PDP contexts\n", |
| 621 | ggsn->remote_restart_ctr, recovery, pdp, pdp ? " other" : ""); |
Harald Welte | a9b473a | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 622 | ggsn->remote_restart_ctr = recovery; |
Pau Espin Pedrol | ef6d78f | 2018-07-17 15:56:53 +0200 | [diff] [blame] | 623 | if (pdp) |
| 624 | pctx = pdp->priv; |
| 625 | sgsn_ggsn_ctx_drop_all_pdp_except(ggsn, pctx); |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 626 | } |
| 627 | return 0; |
| 628 | } |
| 629 | |
| 630 | /* libgtp callback for confirmations */ |
| 631 | static int cb_conf(int type, int cause, struct pdp_t *pdp, void *cbp) |
| 632 | { |
| 633 | DEBUGP(DGPRS, "libgtp cb_conf(type=%d, cause=%d, pdp=%p, cbp=%p)\n", |
| 634 | type, cause, pdp, cbp); |
| 635 | |
| 636 | if (cause == EOF) |
| 637 | LOGP(DGPRS, LOGL_ERROR, "libgtp EOF (type=%u, pdp=%p, cbp=%p)\n", |
| 638 | type, pdp, cbp); |
| 639 | |
| 640 | switch (type) { |
| 641 | case GTP_ECHO_REQ: |
Pau Espin Pedrol | 259e303 | 2019-08-28 16:54:16 +0200 | [diff] [blame] | 642 | /* libgtp hands us the RECOVERY number instead of a cause (EOF on timeout) */ |
| 643 | return echo_conf(cbp, cause == EOF); |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 644 | case GTP_CREATE_PDP_REQ: |
| 645 | return create_pdp_conf(pdp, cbp, cause); |
Pau Espin Pedrol | 8969db7 | 2021-04-21 20:12:44 +0200 | [diff] [blame] | 646 | case GTP_UPDATE_PDP_REQ: |
| 647 | return update_pdp_conf(pdp, cbp, cause); |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 648 | case GTP_DELETE_PDP_REQ: |
Harald Welte | 77289c2 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 649 | return delete_pdp_conf(pdp, cbp, cause); |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 650 | default: |
| 651 | break; |
| 652 | } |
| 653 | return 0; |
| 654 | } |
| 655 | |
| 656 | /* Called whenever a PDP context is deleted for any reason */ |
| 657 | static int cb_delete_context(struct pdp_t *pdp) |
| 658 | { |
Pau Espin Pedrol | 2cf70e0 | 2018-07-16 11:31:23 +0200 | [diff] [blame] | 659 | struct sgsn_pdp_ctx *pctx = pdp->priv; |
| 660 | |
Pau Espin Pedrol | 80d407f | 2018-07-09 20:42:20 +0200 | [diff] [blame] | 661 | LOGPDPX(DGPRS, LOGL_INFO, pdp, "Context %p was deleted\n", pdp); |
Max | a3b73e9 | 2017-09-27 15:08:17 +0200 | [diff] [blame] | 662 | |
Pau Espin Pedrol | d8037bc | 2019-08-29 14:24:23 +0200 | [diff] [blame] | 663 | /* unlink the now non-existing library handle from the pdp context. |
| 664 | This way we avoid calling pdp_freepdp() on it, since after returning |
| 665 | from cb_delete_context callback, libgtp is already doing so. */ |
Pau Espin Pedrol | 2cf70e0 | 2018-07-16 11:31:23 +0200 | [diff] [blame] | 666 | pctx->lib = NULL; |
| 667 | |
| 668 | sgsn_ggsn_ctx_drop_pdp(pctx); |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 669 | return 0; |
| 670 | } |
| 671 | |
| 672 | /* Called when we receive a Version Not Supported message */ |
| 673 | static int cb_unsup_ind(struct sockaddr_in *peer) |
| 674 | { |
| 675 | LOGP(DGPRS, LOGL_INFO, "GTP Version not supported Indication " |
| 676 | "from %s:%u\n", inet_ntoa(peer->sin_addr), |
| 677 | ntohs(peer->sin_port)); |
| 678 | return 0; |
| 679 | } |
| 680 | |
| 681 | /* Called when we receive a Supported Ext Headers Notification */ |
| 682 | static int cb_extheader_ind(struct sockaddr_in *peer) |
| 683 | { |
Pau Espin Pedrol | e77ee12 | 2018-02-12 17:40:33 +0100 | [diff] [blame] | 684 | LOGP(DGPRS, LOGL_INFO, "GTP Supported Ext Headers Notification " |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 685 | "from %s:%u\n", inet_ntoa(peer->sin_addr), |
| 686 | ntohs(peer->sin_port)); |
| 687 | return 0; |
| 688 | } |
| 689 | |
Pau Espin Pedrol | e5c8998 | 2021-05-03 18:16:42 +0200 | [diff] [blame^] | 690 | static int cb_gtp_ran_info_relay_ind(struct sockaddr_in *peer, union gtpie_member **ie) |
| 691 | { |
| 692 | char addrbuf[INET_ADDRSTRLEN]; |
| 693 | struct sgsn_mme_ctx *mme = sgsn_mme_ctx_by_addr(sgsn, &peer->sin_addr); |
| 694 | if (!mme) { |
| 695 | LOGP(DGTP, LOGL_NOTICE, "Rx GTP RAN Information Relay from unknown MME %s\n", |
| 696 | inet_ntop(AF_INET, &peer->sin_addr, addrbuf, sizeof(addrbuf))); |
| 697 | return -ECONNREFUSED; |
| 698 | } |
| 699 | |
| 700 | LOGMME(mme, DGTP, LOGL_INFO, "Rx GTP RAN Information Relay\n"); |
| 701 | |
| 702 | unsigned int len = 0; |
| 703 | struct msgb *msg = msgb_alloc(4096, "gtpcv1_ran_info"); |
| 704 | struct bssgp_ran_information_pdu pdu; |
| 705 | |
| 706 | if (gtpie_gettlv(ie, GTPIE_RAN_T_CONTAIN, 0, &len, msgb_data(msg), 4096) || len <= 0) { |
| 707 | LOGMME(mme, DGTP, LOGL_ERROR, "Rx GTP RAN Information Relay: No Transparent Container IE found!\n"); |
| 708 | goto ret_error; |
| 709 | } |
| 710 | msgb_put(msg, len); |
| 711 | msgb_bssgph(msg) = msg->data; |
| 712 | msgb_nsei(msg) = 0; |
| 713 | if (bssgp_parse_rim_pdu(&pdu, msg) < 0) { |
| 714 | LOGMME(mme, DGTP, LOGL_ERROR, "Rx GTP RAN Information Relay: Failed parsing Transparent Container IE!\n"); |
| 715 | goto ret_error; |
| 716 | } |
| 717 | |
| 718 | msgb_free(msg); |
| 719 | return sgsn_rim_rx_from_gtp(&pdu, mme); |
| 720 | |
| 721 | ret_error: |
| 722 | msgb_free(msg); |
| 723 | return -EINVAL; |
| 724 | } |
| 725 | |
Pau Espin Pedrol | e77ee12 | 2018-02-12 17:40:33 +0100 | [diff] [blame] | 726 | /* Called whenever we receive a DATA packet */ |
Harald Welte | bb1c805 | 2010-06-03 06:38:38 +0200 | [diff] [blame] | 727 | 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] | 728 | { |
Harald Welte | bb1c805 | 2010-06-03 06:38:38 +0200 | [diff] [blame] | 729 | struct sgsn_pdp_ctx *pdp; |
Harald Welte | bb35c45 | 2010-06-09 16:22:28 +0200 | [diff] [blame] | 730 | struct sgsn_mm_ctx *mm; |
| 731 | struct msgb *msg; |
Harald Welte | bb1c805 | 2010-06-03 06:38:38 +0200 | [diff] [blame] | 732 | uint8_t *ud; |
| 733 | |
Harald Welte | bb1c805 | 2010-06-03 06:38:38 +0200 | [diff] [blame] | 734 | pdp = lib->priv; |
| 735 | if (!pdp) { |
Harald Welte | fdf453c | 2012-07-14 12:15:19 +0200 | [diff] [blame] | 736 | LOGP(DGPRS, LOGL_NOTICE, |
| 737 | "GTP DATA IND from GGSN for unknown PDP\n"); |
Harald Welte | bb1c805 | 2010-06-03 06:38:38 +0200 | [diff] [blame] | 738 | return -EIO; |
| 739 | } |
Harald Welte | bb35c45 | 2010-06-09 16:22:28 +0200 | [diff] [blame] | 740 | mm = pdp->mm; |
Harald Welte | fdf453c | 2012-07-14 12:15:19 +0200 | [diff] [blame] | 741 | if (!mm) { |
| 742 | LOGP(DGPRS, LOGL_ERROR, |
Max | 0436e42 | 2017-03-02 13:28:52 +0100 | [diff] [blame] | 743 | "PDP context (address=%u) without MM context!\n", |
| 744 | pdp->address); |
Harald Welte | fdf453c | 2012-07-14 12:15:19 +0200 | [diff] [blame] | 745 | return -EIO; |
| 746 | } |
Harald Welte | bb1c805 | 2010-06-03 06:38:38 +0200 | [diff] [blame] | 747 | |
Max | 0436e42 | 2017-03-02 13:28:52 +0100 | [diff] [blame] | 748 | DEBUGP(DGPRS, "GTP DATA IND from GGSN for %s, length=%u\n", mm->imsi, |
| 749 | len); |
| 750 | |
Daniel Willmann | 21b269f | 2016-05-11 12:43:47 +0200 | [diff] [blame] | 751 | if (mm->ran_type == MM_CTX_T_UTRAN_Iu) { |
| 752 | #ifdef BUILD_IU |
| 753 | /* Ignore the packet for now and page the UE to get the RAB |
| 754 | * reestablished */ |
Neels Hofmeyr | a7a3947 | 2017-07-05 15:19:52 +0200 | [diff] [blame] | 755 | 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] | 756 | |
| 757 | return 0; |
| 758 | #else |
| 759 | return -ENOTSUP; |
| 760 | #endif |
| 761 | } |
| 762 | |
Sylvain Munaut | 5914bad | 2010-06-09 20:49:24 +0200 | [diff] [blame] | 763 | msg = msgb_alloc_headroom(len+256, 128, "GTP->SNDCP"); |
Harald Welte | bb1c805 | 2010-06-03 06:38:38 +0200 | [diff] [blame] | 764 | ud = msgb_put(msg, len); |
| 765 | memcpy(ud, packet, len); |
| 766 | |
Harald Welte | f97ee04 | 2015-12-25 19:12:21 +0100 | [diff] [blame] | 767 | msgb_tlli(msg) = mm->gb.tlli; |
| 768 | msgb_bvci(msg) = mm->gb.bvci; |
| 769 | msgb_nsei(msg) = mm->gb.nsei; |
Harald Welte | bb1c805 | 2010-06-03 06:38:38 +0200 | [diff] [blame] | 770 | |
Pau Espin Pedrol | 31c4657 | 2019-09-02 16:45:27 +0200 | [diff] [blame] | 771 | switch (mm->gmm_fsm->state) { |
| 772 | case ST_GMM_REGISTERED_SUSPENDED: |
Pau Espin Pedrol | b3e10aa | 2020-06-26 12:09:34 +0200 | [diff] [blame] | 773 | LOGMMCTXP(LOGL_INFO, mm, "Dropping DL packet for MS in GMM state %s\n", |
Pau Espin Pedrol | cfd307b | 2020-06-16 19:26:43 +0200 | [diff] [blame] | 774 | osmo_fsm_inst_state_name(mm->gmm_fsm)); |
Pau Espin Pedrol | b3e10aa | 2020-06-26 12:09:34 +0200 | [diff] [blame] | 775 | msgb_free(msg); |
| 776 | return -1; |
Pau Espin Pedrol | 31c4657 | 2019-09-02 16:45:27 +0200 | [diff] [blame] | 777 | case ST_GMM_REGISTERED_NORMAL: |
Alexander Couzens | 4d1d2e7 | 2019-10-08 17:31:10 +0200 | [diff] [blame] | 778 | OSMO_ASSERT(mm->gb.mm_state_fsm->state != ST_MM_IDLE); |
Pau Espin Pedrol | cfd307b | 2020-06-16 19:26:43 +0200 | [diff] [blame] | 779 | if (mm->gb.mm_state_fsm->state == ST_MM_STANDBY) { |
| 780 | LOGMMCTXP(LOGL_INFO, mm, "Paging MS in GMM state %s, MM state %s\n", |
| 781 | osmo_fsm_inst_state_name(mm->gmm_fsm), |
| 782 | osmo_fsm_inst_state_name(mm->gb.mm_state_fsm)); |
Alexander Couzens | 4d1d2e7 | 2019-10-08 17:31:10 +0200 | [diff] [blame] | 783 | gprs_gb_page_ps_ra(mm); |
Pau Espin Pedrol | cfd307b | 2020-06-16 19:26:43 +0200 | [diff] [blame] | 784 | } |
Alexander Couzens | 4d1d2e7 | 2019-10-08 17:31:10 +0200 | [diff] [blame] | 785 | |
| 786 | /* FIXME: queue the packet we received from GTP */ |
Harald Welte | bb35c45 | 2010-06-09 16:22:28 +0200 | [diff] [blame] | 787 | break; |
| 788 | default: |
| 789 | LOGP(DGPRS, LOGL_ERROR, "GTP DATA IND for TLLI %08X in state " |
Pau Espin Pedrol | 31c4657 | 2019-09-02 16:45:27 +0200 | [diff] [blame] | 790 | "%s\n", mm->gb.tlli, osmo_fsm_inst_state_name(mm->gmm_fsm)); |
Harald Welte | bb35c45 | 2010-06-09 16:22:28 +0200 | [diff] [blame] | 791 | msgb_free(msg); |
| 792 | return -1; |
| 793 | } |
| 794 | |
Harald Welte | efbdee9 | 2010-06-10 00:20:12 +0200 | [diff] [blame] | 795 | rate_ctr_inc(&pdp->ctrg->ctr[PDP_CTR_PKTS_UDATA_OUT]); |
| 796 | rate_ctr_add(&pdp->ctrg->ctr[PDP_CTR_BYTES_UDATA_OUT], len); |
| 797 | rate_ctr_inc(&mm->ctrg->ctr[GMM_CTR_PKTS_UDATA_OUT]); |
| 798 | rate_ctr_add(&mm->ctrg->ctr[GMM_CTR_BYTES_UDATA_OUT], len); |
| 799 | |
Holger Hans Peter Freyther | 4f5b823 | 2015-05-05 22:25:48 +0200 | [diff] [blame] | 800 | /* It is easier to have a global count */ |
| 801 | pdp->cdr_bytes_out += len; |
| 802 | |
Harald Welte | f97ee04 | 2015-12-25 19:12:21 +0100 | [diff] [blame] | 803 | return sndcp_unitdata_req(msg, &mm->gb.llme->lle[pdp->sapi], |
Harald Welte | bb35c45 | 2010-06-09 16:22:28 +0200 | [diff] [blame] | 804 | pdp->nsapi, mm); |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 805 | } |
| 806 | |
Harald Welte | ebabdea | 2010-06-01 18:28:10 +0200 | [diff] [blame] | 807 | /* Called by SNDCP when it has received/re-assembled a N-PDU */ |
Harald Welte | 8911cef | 2010-07-01 19:56:19 +0200 | [diff] [blame] | 808 | int sgsn_rx_sndcp_ud_ind(struct gprs_ra_id *ra_id, int32_t tlli, uint8_t nsapi, |
| 809 | struct msgb *msg, uint32_t npdu_len, uint8_t *npdu) |
Harald Welte | ebabdea | 2010-06-01 18:28:10 +0200 | [diff] [blame] | 810 | { |
| 811 | struct sgsn_mm_ctx *mmctx; |
| 812 | struct sgsn_pdp_ctx *pdp; |
Harald Welte | ebabdea | 2010-06-01 18:28:10 +0200 | [diff] [blame] | 813 | |
| 814 | /* look-up the MM context for this message */ |
Harald Welte | 8911cef | 2010-07-01 19:56:19 +0200 | [diff] [blame] | 815 | mmctx = sgsn_mm_ctx_by_tlli(tlli, ra_id); |
Harald Welte | ebabdea | 2010-06-01 18:28:10 +0200 | [diff] [blame] | 816 | if (!mmctx) { |
| 817 | LOGP(DGPRS, LOGL_ERROR, |
| 818 | "Cannot find MM CTX for TLLI %08x\n", tlli); |
| 819 | return -EIO; |
| 820 | } |
| 821 | /* look-up the PDP context for this message */ |
| 822 | pdp = sgsn_pdp_ctx_by_nsapi(mmctx, nsapi); |
| 823 | if (!pdp) { |
| 824 | LOGP(DGPRS, LOGL_ERROR, "Cannot find PDP CTX for " |
| 825 | "TLLI=%08x, NSAPI=%u\n", tlli, nsapi); |
| 826 | return -EIO; |
| 827 | } |
| 828 | if (!pdp->lib) { |
| 829 | LOGP(DGPRS, LOGL_ERROR, "PDP CTX without libgtp\n"); |
| 830 | return -EIO; |
| 831 | } |
Harald Welte | efbdee9 | 2010-06-10 00:20:12 +0200 | [diff] [blame] | 832 | |
| 833 | rate_ctr_inc(&pdp->ctrg->ctr[PDP_CTR_PKTS_UDATA_IN]); |
| 834 | rate_ctr_add(&pdp->ctrg->ctr[PDP_CTR_BYTES_UDATA_IN], npdu_len); |
| 835 | rate_ctr_inc(&mmctx->ctrg->ctr[GMM_CTR_PKTS_UDATA_IN]); |
| 836 | rate_ctr_add(&mmctx->ctrg->ctr[GMM_CTR_BYTES_UDATA_IN], npdu_len); |
| 837 | |
Holger Hans Peter Freyther | 4f5b823 | 2015-05-05 22:25:48 +0200 | [diff] [blame] | 838 | /* It is easier to have a global count */ |
| 839 | pdp->cdr_bytes_in += npdu_len; |
| 840 | |
Harald Welte | efbdee9 | 2010-06-10 00:20:12 +0200 | [diff] [blame] | 841 | return gtp_data_req(pdp->ggsn->gsn, pdp->lib, npdu, npdu_len); |
Harald Welte | ebabdea | 2010-06-01 18:28:10 +0200 | [diff] [blame] | 842 | } |
| 843 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 844 | /* libgtp select loop integration */ |
Pablo Neira Ayuso | 4db9299 | 2011-05-06 12:11:23 +0200 | [diff] [blame] | 845 | 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] | 846 | { |
| 847 | struct sgsn_instance *sgi = fd->data; |
| 848 | int rc; |
| 849 | |
Pau Espin Pedrol | b2ebc59 | 2020-05-09 19:21:15 +0200 | [diff] [blame] | 850 | if (!(what & OSMO_FD_READ)) |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 851 | return 0; |
| 852 | |
| 853 | switch (fd->priv_nr) { |
| 854 | case 0: |
| 855 | rc = gtp_decaps0(sgi->gsn); |
| 856 | break; |
| 857 | case 1: |
| 858 | rc = gtp_decaps1c(sgi->gsn); |
| 859 | break; |
| 860 | case 2: |
| 861 | rc = gtp_decaps1u(sgi->gsn); |
| 862 | break; |
Harald Welte | cd4dd4d | 2010-05-18 17:20:49 +0200 | [diff] [blame] | 863 | default: |
| 864 | rc = -EINVAL; |
| 865 | break; |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 866 | } |
| 867 | return rc; |
| 868 | } |
| 869 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 870 | int sgsn_gtp_init(struct sgsn_instance *sgi) |
| 871 | { |
| 872 | int rc; |
| 873 | struct gsn_t *gsn; |
| 874 | |
| 875 | rc = gtp_new(&sgi->gsn, sgi->cfg.gtp_statedir, |
| 876 | &sgi->cfg.gtp_listenaddr.sin_addr, GTP_MODE_SGSN); |
| 877 | if (rc) { |
| 878 | LOGP(DGPRS, LOGL_ERROR, "Failed to create GTP: %d\n", rc); |
| 879 | return rc; |
| 880 | } |
Max | f89be66 | 2017-10-27 18:56:34 +0200 | [diff] [blame] | 881 | LOGP(DGPRS, LOGL_NOTICE, "Created GTP on %s\n", inet_ntoa(sgi->cfg.gtp_listenaddr.sin_addr)); |
| 882 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 883 | gsn = sgi->gsn; |
| 884 | |
Max | 6f24402 | 2017-10-20 14:28:04 +0200 | [diff] [blame] | 885 | if (gsn->mode != GTP_MODE_SGSN) |
| 886 | return -EINVAL; |
| 887 | |
Harald Welte | be2330f | 2020-10-19 12:32:20 +0200 | [diff] [blame] | 888 | osmo_fd_setup(&sgi->gtp_fd0, gsn->fd0, OSMO_FD_READ, sgsn_gtp_fd_cb, sgi, 0); |
Pablo Neira Ayuso | 4db9299 | 2011-05-06 12:11:23 +0200 | [diff] [blame] | 889 | rc = osmo_fd_register(&sgi->gtp_fd0); |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 890 | if (rc < 0) |
| 891 | return rc; |
| 892 | |
Harald Welte | be2330f | 2020-10-19 12:32:20 +0200 | [diff] [blame] | 893 | osmo_fd_setup(&sgi->gtp_fd1c, gsn->fd1c, OSMO_FD_READ, sgsn_gtp_fd_cb, sgi, 1); |
Holger Hans Peter Freyther | 3a708af | 2013-07-04 18:39:02 +0200 | [diff] [blame] | 894 | rc = osmo_fd_register(&sgi->gtp_fd1c); |
| 895 | if (rc < 0) { |
| 896 | osmo_fd_unregister(&sgi->gtp_fd0); |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 897 | return rc; |
Holger Hans Peter Freyther | 3a708af | 2013-07-04 18:39:02 +0200 | [diff] [blame] | 898 | } |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 899 | |
Harald Welte | be2330f | 2020-10-19 12:32:20 +0200 | [diff] [blame] | 900 | osmo_fd_setup(&sgi->gtp_fd1u, gsn->fd1u, OSMO_FD_READ, sgsn_gtp_fd_cb, sgi, 2); |
Holger Hans Peter Freyther | 3a708af | 2013-07-04 18:39:02 +0200 | [diff] [blame] | 901 | rc = osmo_fd_register(&sgi->gtp_fd1u); |
| 902 | if (rc < 0) { |
| 903 | osmo_fd_unregister(&sgi->gtp_fd0); |
| 904 | osmo_fd_unregister(&sgi->gtp_fd1c); |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 905 | return rc; |
Holger Hans Peter Freyther | 3a708af | 2013-07-04 18:39:02 +0200 | [diff] [blame] | 906 | } |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 907 | |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 908 | /* Register callbackcs with libgtp */ |
| 909 | gtp_set_cb_delete_context(gsn, cb_delete_context); |
| 910 | gtp_set_cb_conf(gsn, cb_conf); |
Pau Espin Pedrol | ef6d78f | 2018-07-17 15:56:53 +0200 | [diff] [blame] | 911 | gtp_set_cb_recovery2(gsn, cb_recovery2); |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 912 | gtp_set_cb_data_ind(gsn, cb_data_ind); |
| 913 | gtp_set_cb_unsup_ind(gsn, cb_unsup_ind); |
| 914 | gtp_set_cb_extheader_ind(gsn, cb_extheader_ind); |
Pau Espin Pedrol | e5c8998 | 2021-05-03 18:16:42 +0200 | [diff] [blame^] | 915 | gtp_set_cb_ran_info_relay_ind(gsn, cb_gtp_ran_info_relay_ind); |
Harald Welte | 2720e73 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 916 | |
| 917 | return 0; |
| 918 | } |