Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 1 | /* GPRS SGSN integration with libgtp of OpenGGSN */ |
Harald Welte | 3a33319 | 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 | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 3 | |
| 4 | /* (C) 2010 by Harald Welte <laforge@gnumonks.org> |
Holger Hans Peter Freyther | 5180844 | 2010-10-06 20:37:09 +0800 | [diff] [blame] | 5 | * (C) 2010 by On-Waves |
Holger Hans Peter Freyther | 786cfee | 2015-04-23 09:53:53 -0400 | [diff] [blame] | 6 | * (C) 2015 by Holger Hans Peter Freyther |
Harald Welte | 8f77f19 | 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 | 0e3e88e | 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 | 8f77f19 | 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 | 0e3e88e | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 17 | * GNU Affero General Public License for more details. |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 18 | * |
Harald Welte | 0e3e88e | 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 | 8f77f19 | 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 | 8f77f19 | 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 | 945f608 | 2016-05-21 17:35:57 +0200 | [diff] [blame] | 37 | #include "bscconfig.h" |
| 38 | |
Pablo Neira Ayuso | dd5fff4 | 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 | cfb6b28 | 2012-06-16 14:59:56 +0800 | [diff] [blame] | 42 | #include <osmocom/gprs/gprs_bssgp.h> |
Harald Welte | 35ade5e | 2016-04-20 17:11:43 +0200 | [diff] [blame] | 43 | #include <osmocom/gsm/protocol/gsm_04_08_gprs.h> |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 44 | |
| 45 | #include <openbsc/signal.h> |
| 46 | #include <openbsc/debug.h> |
| 47 | #include <openbsc/sgsn.h> |
Harald Welte | d0e36dc | 2010-06-01 18:28:10 +0200 | [diff] [blame] | 48 | #include <openbsc/gprs_llc.h> |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 49 | #include <openbsc/gprs_sgsn.h> |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 50 | #include <openbsc/gprs_gmm.h> |
Holger Hans Peter Freyther | 786cfee | 2015-04-23 09:53:53 -0400 | [diff] [blame] | 51 | #include <openbsc/gsm_subscriber.h> |
Philipp | 91df16c | 2016-08-26 17:00:21 +0200 | [diff] [blame] | 52 | #include <openbsc/gprs_sndcp.h> |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 53 | |
Daniel Willmann | 945f608 | 2016-05-21 17:35:57 +0200 | [diff] [blame] | 54 | #ifdef BUILD_IU |
| 55 | #include <openbsc/iu.h> |
| 56 | #include <osmocom/ranap/ranap_ies_defs.h> |
| 57 | #endif |
| 58 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 59 | #include <gtp.h> |
| 60 | #include <pdp.h> |
| 61 | |
Harald Welte | 8a8a134 | 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 | 8f77f19 | 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 | c1920c0 | 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 | 8f77f19 | 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 | eb471c9 | 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 | c1f6bfe | 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 | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 139 | { |
Holger Hans Peter Freyther | 4198b79 | 2015-05-17 17:36:23 +0200 | [diff] [blame] | 140 | struct gprs_ra_id raid; |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 141 | struct sgsn_pdp_ctx *pctx; |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 142 | struct pdp_t *pdp; |
Harald Welte | c1920c0 | 2010-07-02 22:47:39 +0200 | [diff] [blame] | 143 | uint64_t imsi_ui64; |
Holger Hans Peter Freyther | 532b09d | 2015-04-23 11:33:35 -0400 | [diff] [blame] | 144 | size_t qos_len; |
| 145 | const uint8_t *qos; |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 146 | int rc; |
| 147 | |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 148 | LOGP(DGPRS, LOGL_ERROR, "Create PDP Context\n"); |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 149 | pctx = sgsn_pdp_ctx_alloc(mmctx, nsapi); |
| 150 | if (!pctx) { |
| 151 | LOGP(DGPRS, LOGL_ERROR, "Couldn't allocate PDP Ctx\n"); |
| 152 | return NULL; |
| 153 | } |
| 154 | |
Harald Welte | c1920c0 | 2010-07-02 22:47:39 +0200 | [diff] [blame] | 155 | imsi_ui64 = imsi_str2gtp(mmctx->imsi); |
| 156 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 157 | rc = pdp_newpdp(&pdp, imsi_ui64, nsapi, NULL); |
| 158 | if (rc) { |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 159 | LOGP(DGPRS, LOGL_ERROR, "Out of libgtp PDP Contexts\n"); |
| 160 | return NULL; |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 161 | } |
Harald Welte | ef1bef7 | 2010-06-03 06:38:38 +0200 | [diff] [blame] | 162 | pdp->priv = pctx; |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 163 | pctx->lib = pdp; |
| 164 | pctx->ggsn = ggsn; |
| 165 | |
Harald Welte | 8f77f19 | 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 */ |
| 172 | |
Holger Hans Peter Freyther | 604ead0 | 2015-05-22 10:03:21 +0800 | [diff] [blame] | 173 | /* MS provided APN, subscription was verified by the caller */ |
| 174 | pdp->selmode = 0xFC | 0x00; |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 175 | |
| 176 | /* IMSI, TEID/TEIC, FLLU/FLLC, TID, NSAPI set in pdp_newpdp */ |
| 177 | |
Holger Hans Peter Freyther | 786cfee | 2015-04-23 09:53:53 -0400 | [diff] [blame] | 178 | /* Put the MSISDN in case we have it */ |
Harald Welte | 8a8a134 | 2016-11-01 03:32:50 +0100 | [diff] [blame] | 179 | if (mmctx->subscr && mmctx->subscr->sgsn_data->msisdn_len) { |
Holger Hans Peter Freyther | 786cfee | 2015-04-23 09:53:53 -0400 | [diff] [blame] | 180 | pdp->msisdn.l = mmctx->subscr->sgsn_data->msisdn_len; |
| 181 | if (pdp->msisdn.l > sizeof(pdp->msisdn.v)) |
Holger Hans Peter Freyther | 4a091e3 | 2015-10-12 10:43:17 +0200 | [diff] [blame] | 182 | pdp->msisdn.l = sizeof(pdp->msisdn.v); |
Holger Hans Peter Freyther | 786cfee | 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 | 8a8a134 | 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 | 786cfee | 2015-04-23 09:53:53 -0400 | [diff] [blame] | 189 | } |
Harald Welte | 8f77f19 | 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 */ |
| 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), |
| 206 | pdp->apn_use.l); |
| 207 | |
| 208 | /* Protocol Configuration Options from GMM */ |
| 209 | pdp->pco_req.l = TLVP_LEN(tp, GSM48_IE_GSM_PROTO_CONF_OPT); |
| 210 | if (pdp->pco_req.l > sizeof(pdp->pco_req.v)) |
| 211 | pdp->pco_req.l = sizeof(pdp->pco_req.v); |
| 212 | memcpy(pdp->pco_req.v, TLVP_VAL(tp, GSM48_IE_GSM_PROTO_CONF_OPT), |
| 213 | pdp->pco_req.l); |
| 214 | |
Holger Hans Peter Freyther | 532b09d | 2015-04-23 11:33:35 -0400 | [diff] [blame] | 215 | /* QoS options from GMM or remote */ |
| 216 | if (TLVP_LEN(tp, OSMO_IE_GSM_SUB_QOS) > 0) { |
| 217 | qos_len = TLVP_LEN(tp, OSMO_IE_GSM_SUB_QOS); |
| 218 | qos = TLVP_VAL(tp, OSMO_IE_GSM_SUB_QOS); |
| 219 | } else { |
| 220 | qos_len = TLVP_LEN(tp, OSMO_IE_GSM_REQ_QOS); |
| 221 | qos = TLVP_VAL(tp, OSMO_IE_GSM_REQ_QOS); |
| 222 | } |
| 223 | |
Holger Hans Peter Freyther | 05f7b04 | 2015-04-23 11:50:41 -0400 | [diff] [blame] | 224 | if (qos_len <= 3) { |
| 225 | pdp->qos_req.l = qos_len + 1; |
| 226 | if (pdp->qos_req.l > sizeof(pdp->qos_req.v)) |
| 227 | pdp->qos_req.l = sizeof(pdp->qos_req.v); |
| 228 | pdp->qos_req.v[0] = 0; /* Allocation/Retention policy */ |
| 229 | memcpy(&pdp->qos_req.v[1], qos, pdp->qos_req.l - 1); |
| 230 | } else { |
| 231 | pdp->qos_req.l = qos_len; |
| 232 | if (pdp->qos_req.l > sizeof(pdp->qos_req.v)) |
| 233 | pdp->qos_req.l = sizeof(pdp->qos_req.v); |
| 234 | memcpy(pdp->qos_req.v, qos, pdp->qos_req.l); |
| 235 | } |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 236 | |
| 237 | /* SGSN address for control plane */ |
Harald Welte | aff6aeb | 2010-06-02 23:17:33 +0200 | [diff] [blame] | 238 | pdp->gsnlc.l = sizeof(sgsn->cfg.gtp_listenaddr.sin_addr); |
| 239 | memcpy(pdp->gsnlc.v, &sgsn->cfg.gtp_listenaddr.sin_addr, |
| 240 | sizeof(sgsn->cfg.gtp_listenaddr.sin_addr)); |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 241 | |
Daniel Willmann | 945f608 | 2016-05-21 17:35:57 +0200 | [diff] [blame] | 242 | /* SGSN address for user plane |
| 243 | * Default to the control plane addr for now. If we are connected to a |
| 244 | * hnbgw via IuPS we'll need to send a PDP context update with the |
| 245 | * correct IP address after the RAB Assignment is complete */ |
Harald Welte | aff6aeb | 2010-06-02 23:17:33 +0200 | [diff] [blame] | 246 | pdp->gsnlu.l = sizeof(sgsn->cfg.gtp_listenaddr.sin_addr); |
| 247 | memcpy(pdp->gsnlu.v, &sgsn->cfg.gtp_listenaddr.sin_addr, |
| 248 | sizeof(sgsn->cfg.gtp_listenaddr.sin_addr)); |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 249 | |
Holger Hans Peter Freyther | 0d5ee64 | 2015-04-22 21:40:39 -0400 | [diff] [blame] | 250 | /* Assume we are a GERAN system */ |
| 251 | pdp->rattype.l = 1; |
| 252 | pdp->rattype.v[0] = 2; |
| 253 | pdp->rattype_given = 1; |
| 254 | |
Holger Hans Peter Freyther | a8b5030 | 2015-05-12 22:00:22 +0200 | [diff] [blame] | 255 | /* Include RAI and ULI all the time */ |
Holger Hans Peter Freyther | 293b821 | 2015-05-12 21:46:58 +0200 | [diff] [blame] | 256 | pdp->rai_given = 1; |
| 257 | pdp->rai.l = 6; |
Holger Hans Peter Freyther | 4198b79 | 2015-05-17 17:36:23 +0200 | [diff] [blame] | 258 | raid = mmctx->ra; |
| 259 | raid.lac = 0xFFFE; |
| 260 | raid.rac = 0xFF; |
| 261 | gsm48_construct_ra(pdp->rai.v, &raid); |
Holger Hans Peter Freyther | 293b821 | 2015-05-12 21:46:58 +0200 | [diff] [blame] | 262 | |
Holger Hans Peter Freyther | a8b5030 | 2015-05-12 22:00:22 +0200 | [diff] [blame] | 263 | pdp->userloc_given = 1; |
| 264 | pdp->userloc.l = 8; |
| 265 | pdp->userloc.v[0] = 0; /* CGI for GERAN */ |
Harald Welte | c28dc2f | 2015-12-25 19:12:21 +0100 | [diff] [blame] | 266 | bssgp_create_cell_id(&pdp->userloc.v[1], &mmctx->ra, mmctx->gb.cell_id); |
Holger Hans Peter Freyther | a8b5030 | 2015-05-12 22:00:22 +0200 | [diff] [blame] | 267 | |
Holger Hans Peter Freyther | 3f1e772 | 2015-05-12 22:20:05 +0200 | [diff] [blame] | 268 | /* include the IMEI(SV) */ |
| 269 | pdp->imeisv_given = 1; |
| 270 | gsm48_encode_bcd_number(&pdp->imeisv.v[0], 8, 0, mmctx->imei); |
| 271 | pdp->imeisv.l = pdp->imeisv.v[0]; |
| 272 | memmove(&pdp->imeisv.v[0], &pdp->imeisv.v[1], 8); |
| 273 | |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 274 | /* change pdp state to 'requested' */ |
| 275 | pctx->state = PDP_STATE_CR_REQ; |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 276 | |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 277 | rc = gtp_create_context_req(ggsn->gsn, pdp, pctx); |
| 278 | /* FIXME */ |
| 279 | |
| 280 | return pctx; |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 281 | } |
| 282 | |
Harald Welte | f28e1a0 | 2010-12-24 19:21:13 +0100 | [diff] [blame] | 283 | /* SGSN wants to delete a PDP context */ |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 284 | int sgsn_delete_pdp_ctx(struct sgsn_pdp_ctx *pctx) |
| 285 | { |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 286 | LOGPDPCTXP(LOGL_ERROR, pctx, "Delete PDP Context\n"); |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 287 | |
| 288 | /* FIXME: decide if we need teardown or not ! */ |
| 289 | return gtp_delete_context_req(pctx->ggsn->gsn, pctx->lib, pctx, 1); |
| 290 | } |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 291 | |
| 292 | struct cause_map { |
| 293 | uint8_t cause_in; |
| 294 | uint8_t cause_out; |
| 295 | }; |
| 296 | |
| 297 | static uint8_t cause_map(const struct cause_map *map, uint8_t in, uint8_t deflt) |
| 298 | { |
| 299 | const struct cause_map *m; |
| 300 | |
| 301 | for (m = map; m->cause_in && m->cause_out; m++) { |
| 302 | if (m->cause_in == in) |
| 303 | return m->cause_out; |
| 304 | } |
| 305 | return deflt; |
| 306 | } |
| 307 | |
| 308 | /* how do we map from gtp cause to SM cause */ |
| 309 | static const struct cause_map gtp2sm_cause_map[] = { |
| 310 | { GTPCAUSE_NO_RESOURCES, GSM_CAUSE_INSUFF_RSRC }, |
| 311 | { GTPCAUSE_NOT_SUPPORTED, GSM_CAUSE_SERV_OPT_NOTSUPP }, |
| 312 | { GTPCAUSE_MAN_IE_INCORRECT, GSM_CAUSE_INV_MAND_INFO }, |
| 313 | { GTPCAUSE_MAN_IE_MISSING, GSM_CAUSE_INV_MAND_INFO }, |
| 314 | { GTPCAUSE_OPT_IE_INCORRECT, GSM_CAUSE_PROTO_ERR_UNSPEC }, |
| 315 | { GTPCAUSE_SYS_FAIL, GSM_CAUSE_NET_FAIL }, |
| 316 | { GTPCAUSE_ROAMING_REST, GSM_CAUSE_REQ_SERV_OPT_NOTSUB }, |
| 317 | { GTPCAUSE_PTIMSI_MISMATCH, GSM_CAUSE_PROTO_ERR_UNSPEC }, |
| 318 | { GTPCAUSE_CONN_SUSP, GSM_CAUSE_PROTO_ERR_UNSPEC }, |
| 319 | { GTPCAUSE_AUTH_FAIL, GSM_CAUSE_AUTH_FAILED }, |
| 320 | { GTPCAUSE_USER_AUTH_FAIL, GSM_CAUSE_ACT_REJ_GGSN }, |
| 321 | { GTPCAUSE_CONTEXT_NOT_FOUND, GSM_CAUSE_PROTO_ERR_UNSPEC }, |
| 322 | { GTPCAUSE_ADDR_OCCUPIED, GSM_CAUSE_INSUFF_RSRC }, |
| 323 | { GTPCAUSE_NO_MEMORY, GSM_CAUSE_INSUFF_RSRC }, |
| 324 | { GTPCAUSE_RELOC_FAIL, GSM_CAUSE_PROTO_ERR_UNSPEC }, |
| 325 | { GTPCAUSE_UNKNOWN_MAN_EXTHEADER, GSM_CAUSE_PROTO_ERR_UNSPEC }, |
| 326 | { GTPCAUSE_MISSING_APN, GSM_CAUSE_MISSING_APN }, |
| 327 | { GTPCAUSE_UNKNOWN_PDP, GSM_CAUSE_UNKNOWN_PDP }, |
| 328 | { 0, 0 } |
| 329 | }; |
| 330 | |
Daniel Willmann | 7736dda | 2016-05-21 01:40:19 +0200 | [diff] [blame] | 331 | static int send_act_pdp_cont_acc(struct sgsn_pdp_ctx *pctx) |
| 332 | { |
| 333 | struct sgsn_signal_data sig_data; |
Philipp | 91df16c | 2016-08-26 17:00:21 +0200 | [diff] [blame] | 334 | int rc; |
| 335 | struct gprs_llc_lle *lle; |
Daniel Willmann | 7736dda | 2016-05-21 01:40:19 +0200 | [diff] [blame] | 336 | |
| 337 | /* Inform others about it */ |
| 338 | memset(&sig_data, 0, sizeof(sig_data)); |
| 339 | sig_data.pdp = pctx; |
| 340 | osmo_signal_dispatch(SS_SGSN, S_SGSN_PDP_ACT, &sig_data); |
| 341 | |
| 342 | /* Send PDP CTX ACT to MS */ |
Philipp | 91df16c | 2016-08-26 17:00:21 +0200 | [diff] [blame] | 343 | rc = gsm48_tx_gsm_act_pdp_acc(pctx); |
Harald Welte | a1cfebc | 2016-09-28 08:20:58 +0800 | [diff] [blame] | 344 | if (rc < 0) |
Philipp | 91df16c | 2016-08-26 17:00:21 +0200 | [diff] [blame] | 345 | return rc; |
| 346 | |
Neels Hofmeyr | ca8b768 | 2016-09-28 13:44:39 +0200 | [diff] [blame] | 347 | if (pctx->mm->ran_type == MM_CTX_T_GERAN_Gb) { |
| 348 | /* Send SNDCP XID to MS */ |
| 349 | lle = &pctx->mm->gb.llme->lle[pctx->sapi]; |
| 350 | rc = sndcp_sn_xid_req(lle,pctx->nsapi); |
| 351 | if (rc < 0) |
| 352 | return rc; |
| 353 | } |
Philipp | 91df16c | 2016-08-26 17:00:21 +0200 | [diff] [blame] | 354 | |
| 355 | return 0; |
Daniel Willmann | 7736dda | 2016-05-21 01:40:19 +0200 | [diff] [blame] | 356 | } |
| 357 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 358 | /* The GGSN has confirmed the creation of a PDP Context */ |
| 359 | static int create_pdp_conf(struct pdp_t *pdp, void *cbp, int cause) |
| 360 | { |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 361 | struct sgsn_pdp_ctx *pctx = cbp; |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 362 | uint8_t reject_cause; |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 363 | |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 364 | LOGPDPCTXP(LOGL_INFO, pctx, "Received CREATE PDP CTX CONF, cause=%d(%s)\n", |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 365 | cause, get_value_string(gtp_cause_strs, cause)); |
| 366 | |
Jacob Erlbeck | d781c7a | 2014-10-13 10:32:00 +0200 | [diff] [blame] | 367 | if (!pctx->mm) { |
| 368 | LOGP(DGPRS, LOGL_INFO, |
| 369 | "No MM context, aborting CREATE PDP CTX CONF\n"); |
| 370 | return -EIO; |
| 371 | } |
| 372 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 373 | /* Check for cause value if it was really successful */ |
| 374 | if (cause < 0) { |
| 375 | LOGP(DGPRS, LOGL_NOTICE, "Create PDP ctx req timed out\n"); |
Harald Welte | a640f13 | 2010-06-01 11:52:41 +0200 | [diff] [blame] | 376 | if (pdp && pdp->version == 1) { |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 377 | pdp->version = 0; |
Harald Welte | 17072d1 | 2010-05-17 00:53:10 +0200 | [diff] [blame] | 378 | gtp_create_context_req(sgsn->gsn, pdp, cbp); |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 379 | return 0; |
| 380 | } else { |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 381 | reject_cause = GSM_CAUSE_NET_FAIL; |
| 382 | goto reject; |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 383 | } |
| 384 | } |
| 385 | |
| 386 | /* Check for cause value if it was really successful */ |
| 387 | if (cause != GTPCAUSE_ACC_REQ) { |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 388 | reject_cause = cause_map(gtp2sm_cause_map, cause, |
| 389 | GSM_CAUSE_ACT_REJ_GGSN); |
| 390 | goto reject; |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 391 | } |
| 392 | |
Daniel Willmann | 711adc2 | 2016-05-20 22:36:23 +0200 | [diff] [blame] | 393 | if (pctx->mm->ran_type == MM_CTX_T_GERAN_Gb) { |
| 394 | /* Activate the SNDCP layer */ |
| 395 | sndcp_sm_activate_ind(&pctx->mm->gb.llme->lle[pctx->sapi], pctx->nsapi); |
| 396 | return send_act_pdp_cont_acc(pctx); |
Daniel Willmann | 943f973 | 2016-05-21 00:53:42 +0200 | [diff] [blame] | 397 | } else if (pctx->mm->ran_type == MM_CTX_T_UTRAN_Iu) { |
| 398 | #ifdef BUILD_IU |
| 399 | /* Activate a radio bearer */ |
| 400 | iu_rab_act_ps(pdp->nsapi, pctx, 1); |
| 401 | return 0; |
| 402 | #else |
| 403 | return -ENOTSUP; |
| 404 | #endif |
Daniel Willmann | 711adc2 | 2016-05-20 22:36:23 +0200 | [diff] [blame] | 405 | } |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 406 | |
Neels Hofmeyr | 47f1943 | 2016-07-23 22:23:17 +0200 | [diff] [blame] | 407 | LOGP(DGPRS, LOGL_ERROR, "Unknown ran_type %d\n", |
| 408 | pctx->mm->ran_type); |
| 409 | reject_cause = GSM_CAUSE_PROTO_ERR_UNSPEC; |
| 410 | |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 411 | reject: |
Holger Hans Peter Freyther | 7e066c1 | 2013-07-30 08:45:29 +0200 | [diff] [blame] | 412 | /* |
| 413 | * In case of a timeout pdp will be NULL but we have a valid pointer |
| 414 | * in pctx->lib. For other rejects pctx->lib and pdp might be the |
| 415 | * same. |
| 416 | */ |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 417 | pctx->state = PDP_STATE_NONE; |
Holger Hans Peter Freyther | 7e066c1 | 2013-07-30 08:45:29 +0200 | [diff] [blame] | 418 | if (pctx->lib && pctx->lib != pdp) |
| 419 | pdp_freepdp(pctx->lib); |
| 420 | pctx->lib = NULL; |
| 421 | |
Harald Welte | a640f13 | 2010-06-01 11:52:41 +0200 | [diff] [blame] | 422 | if (pdp) |
| 423 | pdp_freepdp(pdp); |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 424 | /* Send PDP CTX ACT REJ to MS */ |
Holger Hans Peter Freyther | 511c31f | 2014-04-04 12:49:00 +0200 | [diff] [blame] | 425 | gsm48_tx_gsm_act_pdp_rej(pctx->mm, pctx->ti, reject_cause, |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 426 | 0, NULL); |
Harald Welte | 4aa4148 | 2010-06-02 10:09:50 +0200 | [diff] [blame] | 427 | sgsn_pdp_ctx_free(pctx); |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 428 | |
| 429 | return EOF; |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 430 | } |
| 431 | |
Daniel Willmann | 3d224b6 | 2016-05-11 12:43:47 +0200 | [diff] [blame] | 432 | void sgsn_pdp_upd_gtp_u(struct sgsn_pdp_ctx *pdp, void *addr, size_t alen) |
| 433 | { |
| 434 | pdp->lib->gsnlu.l = alen; |
| 435 | memcpy(pdp->lib->gsnlu.v, addr, alen); |
| 436 | gtp_update_context(pdp->ggsn->gsn, pdp->lib, pdp, &pdp->lib->hisaddr0); |
| 437 | } |
| 438 | |
Daniel Willmann | 945f608 | 2016-05-21 17:35:57 +0200 | [diff] [blame] | 439 | #ifdef BUILD_IU |
| 440 | /* Callback for RAB assignment response */ |
| 441 | int sgsn_ranap_rab_ass_resp(struct sgsn_mm_ctx *ctx, RANAP_RAB_SetupOrModifiedItemIEs_t *setup_ies) |
| 442 | { |
| 443 | uint8_t rab_id; |
| 444 | bool require_pdp_update = false; |
| 445 | struct sgsn_pdp_ctx *pdp = NULL; |
| 446 | RANAP_RAB_SetupOrModifiedItem_t *item = &setup_ies->raB_SetupOrModifiedItem; |
| 447 | |
| 448 | rab_id = item->rAB_ID.buf[0]; |
| 449 | |
| 450 | pdp = sgsn_pdp_ctx_by_nsapi(ctx, rab_id); |
| 451 | if (!pdp) { |
| 452 | LOGP(DRANAP, LOGL_ERROR, "RAB Assignment Response for unknown RAB/NSAPI=%u\n", rab_id); |
| 453 | return -1; |
| 454 | } |
| 455 | |
| 456 | if (item->transportLayerAddress) { |
| 457 | LOGPC(DRANAP, LOGL_INFO, " Setup: (%u/%s)", rab_id, osmo_hexdump(item->transportLayerAddress->buf, |
| 458 | item->transportLayerAddress->size)); |
| 459 | switch (item->transportLayerAddress->size) { |
| 460 | case 7: |
| 461 | /* It must be IPv4 inside a X213 NSAP */ |
| 462 | memcpy(pdp->lib->gsnlu.v, &item->transportLayerAddress->buf[3], 4); |
| 463 | break; |
| 464 | case 4: |
| 465 | /* It must be a raw IPv4 address */ |
| 466 | memcpy(pdp->lib->gsnlu.v, item->transportLayerAddress->buf, 4); |
| 467 | break; |
| 468 | case 16: |
| 469 | /* TODO: It must be a raw IPv6 address */ |
| 470 | case 19: |
| 471 | /* TODO: It must be IPv6 inside a X213 NSAP */ |
| 472 | default: |
| 473 | LOGP(DRANAP, LOGL_ERROR, "RAB Assignment Resp: Unknown " |
| 474 | "transport layer address size %u\n", |
| 475 | item->transportLayerAddress->size); |
| 476 | return -1; |
| 477 | } |
| 478 | require_pdp_update = true; |
| 479 | } |
| 480 | |
| 481 | /* The TEI on the RNC side might have changed, too */ |
| 482 | if (item->iuTransportAssociation && |
| 483 | item->iuTransportAssociation->present == RANAP_IuTransportAssociation_PR_gTP_TEI && |
| 484 | item->iuTransportAssociation->choice.gTP_TEI.buf && |
| 485 | item->iuTransportAssociation->choice.gTP_TEI.size >= 4) { |
| 486 | uint32_t tei = osmo_load32be(item->iuTransportAssociation->choice.gTP_TEI.buf); |
| 487 | LOGP(DRANAP, LOGL_DEBUG, "Updating TEID on RNC side from 0x%08x to 0x%08x\n", |
| 488 | pdp->lib->teid_own, tei); |
| 489 | pdp->lib->teid_own = tei; |
| 490 | require_pdp_update = true; |
| 491 | } |
| 492 | |
| 493 | if (require_pdp_update) |
| 494 | gtp_update_context(pdp->ggsn->gsn, pdp->lib, pdp, &pdp->lib->hisaddr0); |
| 495 | |
| 496 | if (pdp->state != PDP_STATE_CR_CONF) { |
| 497 | send_act_pdp_cont_acc(pdp); |
| 498 | pdp->state = PDP_STATE_CR_CONF; |
| 499 | } |
| 500 | return 0; |
| 501 | |
| 502 | } |
| 503 | #endif |
| 504 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 505 | /* Confirmation of a PDP Context Delete */ |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 506 | static int delete_pdp_conf(struct pdp_t *pdp, void *cbp, int cause) |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 507 | { |
Holger Hans Peter Freyther | f14098a | 2015-05-02 19:55:38 +0200 | [diff] [blame] | 508 | struct sgsn_signal_data sig_data; |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 509 | struct sgsn_pdp_ctx *pctx = cbp; |
Jacob Erlbeck | d781c7a | 2014-10-13 10:32:00 +0200 | [diff] [blame] | 510 | int rc = 0; |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 511 | |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 512 | LOGPDPCTXP(LOGL_INFO, pctx, "Received DELETE PDP CTX CONF, cause=%d(%s)\n", |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 513 | cause, get_value_string(gtp_cause_strs, cause)); |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 514 | |
Holger Hans Peter Freyther | f14098a | 2015-05-02 19:55:38 +0200 | [diff] [blame] | 515 | memset(&sig_data, 0, sizeof(sig_data)); |
| 516 | sig_data.pdp = pctx; |
| 517 | osmo_signal_dispatch(SS_SGSN, S_SGSN_PDP_DEACT, &sig_data); |
| 518 | |
Jacob Erlbeck | d781c7a | 2014-10-13 10:32:00 +0200 | [diff] [blame] | 519 | if (pctx->mm) { |
Daniel Willmann | 711adc2 | 2016-05-20 22:36:23 +0200 | [diff] [blame] | 520 | if (pctx->mm->ran_type == MM_CTX_T_GERAN_Gb) { |
| 521 | /* Deactivate the SNDCP layer */ |
| 522 | sndcp_sm_deactivate_ind(&pctx->mm->gb.llme->lle[pctx->sapi], pctx->nsapi); |
Daniel Willmann | 66eb074 | 2016-05-21 00:55:25 +0200 | [diff] [blame] | 523 | } else { |
| 524 | #ifdef BUILD_IU |
| 525 | /* Deactivate radio bearer */ |
| 526 | iu_rab_deact(pctx->mm->iu.ue_ctx, 1); |
| 527 | #else |
| 528 | return -ENOTSUP; |
| 529 | #endif |
Daniel Willmann | 711adc2 | 2016-05-20 22:36:23 +0200 | [diff] [blame] | 530 | } |
Harald Welte | 502e8a5 | 2010-06-28 22:21:57 +0200 | [diff] [blame] | 531 | |
Jacob Erlbeck | d781c7a | 2014-10-13 10:32:00 +0200 | [diff] [blame] | 532 | /* Confirm deactivation of PDP context to MS */ |
| 533 | rc = gsm48_tx_gsm_deact_pdp_acc(pctx); |
| 534 | } else { |
| 535 | LOGPDPCTXP(LOGL_NOTICE, pctx, |
| 536 | "Not deactivating SNDCP layer since the MM context " |
| 537 | "is not available\n"); |
| 538 | } |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 539 | |
Harald Welte | 095b3de | 2012-07-14 12:15:19 +0200 | [diff] [blame] | 540 | /* unlink the now non-existing library handle from the pdp |
| 541 | * context */ |
| 542 | pctx->lib = NULL; |
| 543 | |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 544 | sgsn_pdp_ctx_free(pctx); |
| 545 | |
| 546 | return rc; |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 547 | } |
| 548 | |
| 549 | /* Confirmation of an GTP ECHO request */ |
Harald Welte | 94ecef3 | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 550 | static int echo_conf(struct pdp_t *pdp, void *cbp, int recovery) |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 551 | { |
| 552 | if (recovery < 0) { |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 553 | LOGP(DGPRS, LOGL_NOTICE, "GTP Echo Request timed out\n"); |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 554 | /* FIXME: if version == 1, retry with version 0 */ |
| 555 | } else { |
| 556 | DEBUGP(DGPRS, "GTP Rx Echo Response\n"); |
Harald Welte | 94ecef3 | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 557 | } |
| 558 | return 0; |
| 559 | } |
| 560 | |
| 561 | /* Any message received by GGSN contains a recovery IE */ |
| 562 | static int cb_recovery(struct sockaddr_in *peer, uint8_t recovery) |
| 563 | { |
| 564 | struct sgsn_ggsn_ctx *ggsn; |
| 565 | |
| 566 | ggsn = sgsn_ggsn_ctx_by_addr(&peer->sin_addr); |
| 567 | if (!ggsn) { |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 568 | LOGP(DGPRS, LOGL_NOTICE, "Received Recovery IE for unknown GGSN\n"); |
Harald Welte | 94ecef3 | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 569 | return -EINVAL; |
| 570 | } |
| 571 | |
| 572 | if (ggsn->remote_restart_ctr == -1) { |
| 573 | /* First received ECHO RESPONSE, note the restart ctr */ |
| 574 | ggsn->remote_restart_ctr = recovery; |
| 575 | } else if (ggsn->remote_restart_ctr != recovery) { |
| 576 | /* counter has changed (GGSN restart): release all PDP */ |
| 577 | LOGP(DGPRS, LOGL_NOTICE, "GGSN recovery (%u->%u), " |
| 578 | "releasing all PDP contexts\n", |
| 579 | ggsn->remote_restart_ctr, recovery); |
| 580 | ggsn->remote_restart_ctr = recovery; |
| 581 | drop_all_pdp_for_ggsn(ggsn); |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 582 | } |
| 583 | return 0; |
| 584 | } |
| 585 | |
| 586 | /* libgtp callback for confirmations */ |
| 587 | static int cb_conf(int type, int cause, struct pdp_t *pdp, void *cbp) |
| 588 | { |
| 589 | DEBUGP(DGPRS, "libgtp cb_conf(type=%d, cause=%d, pdp=%p, cbp=%p)\n", |
| 590 | type, cause, pdp, cbp); |
| 591 | |
| 592 | if (cause == EOF) |
| 593 | LOGP(DGPRS, LOGL_ERROR, "libgtp EOF (type=%u, pdp=%p, cbp=%p)\n", |
| 594 | type, pdp, cbp); |
| 595 | |
| 596 | switch (type) { |
| 597 | case GTP_ECHO_REQ: |
Harald Welte | f28e1a0 | 2010-12-24 19:21:13 +0100 | [diff] [blame] | 598 | /* libgtp hands us the RECOVERY number instead of a cause */ |
Harald Welte | 94ecef3 | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 599 | return echo_conf(pdp, cbp, cause); |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 600 | case GTP_CREATE_PDP_REQ: |
| 601 | return create_pdp_conf(pdp, cbp, cause); |
| 602 | case GTP_DELETE_PDP_REQ: |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 603 | return delete_pdp_conf(pdp, cbp, cause); |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 604 | default: |
| 605 | break; |
| 606 | } |
| 607 | return 0; |
| 608 | } |
| 609 | |
| 610 | /* Called whenever a PDP context is deleted for any reason */ |
| 611 | static int cb_delete_context(struct pdp_t *pdp) |
| 612 | { |
| 613 | LOGP(DGPRS, LOGL_INFO, "PDP Context was deleted\n"); |
| 614 | return 0; |
| 615 | } |
| 616 | |
| 617 | /* Called when we receive a Version Not Supported message */ |
| 618 | static int cb_unsup_ind(struct sockaddr_in *peer) |
| 619 | { |
| 620 | LOGP(DGPRS, LOGL_INFO, "GTP Version not supported Indication " |
| 621 | "from %s:%u\n", inet_ntoa(peer->sin_addr), |
| 622 | ntohs(peer->sin_port)); |
| 623 | return 0; |
| 624 | } |
| 625 | |
| 626 | /* Called when we receive a Supported Ext Headers Notification */ |
| 627 | static int cb_extheader_ind(struct sockaddr_in *peer) |
| 628 | { |
| 629 | LOGP(DGPRS, LOGL_INFO, "GTP Supported Ext Headers Noficiation " |
| 630 | "from %s:%u\n", inet_ntoa(peer->sin_addr), |
| 631 | ntohs(peer->sin_port)); |
| 632 | return 0; |
| 633 | } |
| 634 | |
| 635 | /* Called whenever we recive a DATA packet */ |
Harald Welte | ef1bef7 | 2010-06-03 06:38:38 +0200 | [diff] [blame] | 636 | static int cb_data_ind(struct pdp_t *lib, void *packet, unsigned int len) |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 637 | { |
Harald Welte | 92f27a9 | 2010-06-09 16:22:28 +0200 | [diff] [blame] | 638 | struct bssgp_paging_info pinfo; |
Harald Welte | ef1bef7 | 2010-06-03 06:38:38 +0200 | [diff] [blame] | 639 | struct sgsn_pdp_ctx *pdp; |
Harald Welte | 92f27a9 | 2010-06-09 16:22:28 +0200 | [diff] [blame] | 640 | struct sgsn_mm_ctx *mm; |
| 641 | struct msgb *msg; |
Harald Welte | ef1bef7 | 2010-06-03 06:38:38 +0200 | [diff] [blame] | 642 | uint8_t *ud; |
| 643 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 644 | DEBUGP(DGPRS, "GTP DATA IND from GGSN, length=%u\n", len); |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 645 | |
Harald Welte | ef1bef7 | 2010-06-03 06:38:38 +0200 | [diff] [blame] | 646 | pdp = lib->priv; |
| 647 | if (!pdp) { |
Harald Welte | 095b3de | 2012-07-14 12:15:19 +0200 | [diff] [blame] | 648 | LOGP(DGPRS, LOGL_NOTICE, |
| 649 | "GTP DATA IND from GGSN for unknown PDP\n"); |
Harald Welte | ef1bef7 | 2010-06-03 06:38:38 +0200 | [diff] [blame] | 650 | return -EIO; |
| 651 | } |
Harald Welte | 92f27a9 | 2010-06-09 16:22:28 +0200 | [diff] [blame] | 652 | mm = pdp->mm; |
Harald Welte | 095b3de | 2012-07-14 12:15:19 +0200 | [diff] [blame] | 653 | if (!mm) { |
| 654 | LOGP(DGPRS, LOGL_ERROR, |
| 655 | "PDP context (imsi=%s) without MM context!\n", mm->imsi); |
| 656 | return -EIO; |
| 657 | } |
Harald Welte | ef1bef7 | 2010-06-03 06:38:38 +0200 | [diff] [blame] | 658 | |
Daniel Willmann | 3d224b6 | 2016-05-11 12:43:47 +0200 | [diff] [blame] | 659 | if (mm->ran_type == MM_CTX_T_UTRAN_Iu) { |
| 660 | #ifdef BUILD_IU |
| 661 | /* Ignore the packet for now and page the UE to get the RAB |
| 662 | * reestablished */ |
| 663 | iu_page_ps(mm->imsi, &mm->p_tmsi, mm->ra.lac, mm->ra.rac); |
| 664 | |
| 665 | return 0; |
| 666 | #else |
| 667 | return -ENOTSUP; |
| 668 | #endif |
| 669 | } |
| 670 | |
Sylvain Munaut | b59499b | 2010-06-09 20:49:24 +0200 | [diff] [blame] | 671 | msg = msgb_alloc_headroom(len+256, 128, "GTP->SNDCP"); |
Harald Welte | ef1bef7 | 2010-06-03 06:38:38 +0200 | [diff] [blame] | 672 | ud = msgb_put(msg, len); |
| 673 | memcpy(ud, packet, len); |
| 674 | |
Harald Welte | c28dc2f | 2015-12-25 19:12:21 +0100 | [diff] [blame] | 675 | msgb_tlli(msg) = mm->gb.tlli; |
| 676 | msgb_bvci(msg) = mm->gb.bvci; |
| 677 | msgb_nsei(msg) = mm->gb.nsei; |
Harald Welte | ef1bef7 | 2010-06-03 06:38:38 +0200 | [diff] [blame] | 678 | |
Harald Welte | 92f27a9 | 2010-06-09 16:22:28 +0200 | [diff] [blame] | 679 | switch (mm->mm_state) { |
| 680 | case GMM_REGISTERED_SUSPENDED: |
| 681 | /* initiate PS PAGING procedure */ |
| 682 | memset(&pinfo, 0, sizeof(pinfo)); |
| 683 | pinfo.mode = BSSGP_PAGING_PS; |
| 684 | pinfo.scope = BSSGP_PAGING_BVCI; |
Harald Welte | c28dc2f | 2015-12-25 19:12:21 +0100 | [diff] [blame] | 685 | pinfo.bvci = mm->gb.bvci; |
Harald Welte | 92f27a9 | 2010-06-09 16:22:28 +0200 | [diff] [blame] | 686 | pinfo.imsi = mm->imsi; |
Harald Welte | f81c3c8 | 2010-07-01 11:53:25 +0200 | [diff] [blame] | 687 | pinfo.ptmsi = &mm->p_tmsi; |
Harald Welte | 92f27a9 | 2010-06-09 16:22:28 +0200 | [diff] [blame] | 688 | pinfo.drx_params = mm->drx_parms; |
| 689 | pinfo.qos[0] = 0; // FIXME |
Harald Welte | c28dc2f | 2015-12-25 19:12:21 +0100 | [diff] [blame] | 690 | bssgp_tx_paging(mm->gb.nsei, 0, &pinfo); |
Harald Welte | 0fe506b | 2010-06-10 00:20:12 +0200 | [diff] [blame] | 691 | rate_ctr_inc(&mm->ctrg->ctr[GMM_CTR_PAGING_PS]); |
Harald Welte | 92f27a9 | 2010-06-09 16:22:28 +0200 | [diff] [blame] | 692 | /* FIXME: queue the packet we received from GTP */ |
| 693 | break; |
| 694 | case GMM_REGISTERED_NORMAL: |
| 695 | break; |
| 696 | default: |
| 697 | LOGP(DGPRS, LOGL_ERROR, "GTP DATA IND for TLLI %08X in state " |
Harald Welte | c28dc2f | 2015-12-25 19:12:21 +0100 | [diff] [blame] | 698 | "%u\n", mm->gb.tlli, mm->mm_state); |
Harald Welte | 92f27a9 | 2010-06-09 16:22:28 +0200 | [diff] [blame] | 699 | msgb_free(msg); |
| 700 | return -1; |
| 701 | } |
| 702 | |
Harald Welte | 0fe506b | 2010-06-10 00:20:12 +0200 | [diff] [blame] | 703 | rate_ctr_inc(&pdp->ctrg->ctr[PDP_CTR_PKTS_UDATA_OUT]); |
| 704 | rate_ctr_add(&pdp->ctrg->ctr[PDP_CTR_BYTES_UDATA_OUT], len); |
| 705 | rate_ctr_inc(&mm->ctrg->ctr[GMM_CTR_PKTS_UDATA_OUT]); |
| 706 | rate_ctr_add(&mm->ctrg->ctr[GMM_CTR_BYTES_UDATA_OUT], len); |
| 707 | |
Holger Hans Peter Freyther | 33d469b | 2015-05-05 22:25:48 +0200 | [diff] [blame] | 708 | /* It is easier to have a global count */ |
| 709 | pdp->cdr_bytes_out += len; |
| 710 | |
Harald Welte | c28dc2f | 2015-12-25 19:12:21 +0100 | [diff] [blame] | 711 | return sndcp_unitdata_req(msg, &mm->gb.llme->lle[pdp->sapi], |
Harald Welte | 92f27a9 | 2010-06-09 16:22:28 +0200 | [diff] [blame] | 712 | pdp->nsapi, mm); |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 713 | } |
| 714 | |
Harald Welte | d0e36dc | 2010-06-01 18:28:10 +0200 | [diff] [blame] | 715 | /* Called by SNDCP when it has received/re-assembled a N-PDU */ |
Harald Welte | 3322cb3 | 2010-07-01 19:56:19 +0200 | [diff] [blame] | 716 | int sgsn_rx_sndcp_ud_ind(struct gprs_ra_id *ra_id, int32_t tlli, uint8_t nsapi, |
| 717 | struct msgb *msg, uint32_t npdu_len, uint8_t *npdu) |
Harald Welte | d0e36dc | 2010-06-01 18:28:10 +0200 | [diff] [blame] | 718 | { |
| 719 | struct sgsn_mm_ctx *mmctx; |
| 720 | struct sgsn_pdp_ctx *pdp; |
Harald Welte | d0e36dc | 2010-06-01 18:28:10 +0200 | [diff] [blame] | 721 | |
| 722 | /* look-up the MM context for this message */ |
Harald Welte | 3322cb3 | 2010-07-01 19:56:19 +0200 | [diff] [blame] | 723 | mmctx = sgsn_mm_ctx_by_tlli(tlli, ra_id); |
Harald Welte | d0e36dc | 2010-06-01 18:28:10 +0200 | [diff] [blame] | 724 | if (!mmctx) { |
| 725 | LOGP(DGPRS, LOGL_ERROR, |
| 726 | "Cannot find MM CTX for TLLI %08x\n", tlli); |
| 727 | return -EIO; |
| 728 | } |
| 729 | /* look-up the PDP context for this message */ |
| 730 | pdp = sgsn_pdp_ctx_by_nsapi(mmctx, nsapi); |
| 731 | if (!pdp) { |
| 732 | LOGP(DGPRS, LOGL_ERROR, "Cannot find PDP CTX for " |
| 733 | "TLLI=%08x, NSAPI=%u\n", tlli, nsapi); |
| 734 | return -EIO; |
| 735 | } |
| 736 | if (!pdp->lib) { |
| 737 | LOGP(DGPRS, LOGL_ERROR, "PDP CTX without libgtp\n"); |
| 738 | return -EIO; |
| 739 | } |
Harald Welte | 0fe506b | 2010-06-10 00:20:12 +0200 | [diff] [blame] | 740 | |
| 741 | rate_ctr_inc(&pdp->ctrg->ctr[PDP_CTR_PKTS_UDATA_IN]); |
| 742 | rate_ctr_add(&pdp->ctrg->ctr[PDP_CTR_BYTES_UDATA_IN], npdu_len); |
| 743 | rate_ctr_inc(&mmctx->ctrg->ctr[GMM_CTR_PKTS_UDATA_IN]); |
| 744 | rate_ctr_add(&mmctx->ctrg->ctr[GMM_CTR_BYTES_UDATA_IN], npdu_len); |
| 745 | |
Holger Hans Peter Freyther | 33d469b | 2015-05-05 22:25:48 +0200 | [diff] [blame] | 746 | /* It is easier to have a global count */ |
| 747 | pdp->cdr_bytes_in += npdu_len; |
| 748 | |
Harald Welte | 0fe506b | 2010-06-10 00:20:12 +0200 | [diff] [blame] | 749 | return gtp_data_req(pdp->ggsn->gsn, pdp->lib, npdu, npdu_len); |
Harald Welte | d0e36dc | 2010-06-01 18:28:10 +0200 | [diff] [blame] | 750 | } |
| 751 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 752 | /* libgtp select loop integration */ |
Pablo Neira Ayuso | 04d24cd | 2011-05-06 12:11:23 +0200 | [diff] [blame] | 753 | static int sgsn_gtp_fd_cb(struct osmo_fd *fd, unsigned int what) |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 754 | { |
| 755 | struct sgsn_instance *sgi = fd->data; |
| 756 | int rc; |
| 757 | |
| 758 | if (!(what & BSC_FD_READ)) |
| 759 | return 0; |
| 760 | |
| 761 | switch (fd->priv_nr) { |
| 762 | case 0: |
| 763 | rc = gtp_decaps0(sgi->gsn); |
| 764 | break; |
| 765 | case 1: |
| 766 | rc = gtp_decaps1c(sgi->gsn); |
| 767 | break; |
| 768 | case 2: |
| 769 | rc = gtp_decaps1u(sgi->gsn); |
| 770 | break; |
Harald Welte | 50d44fe | 2010-05-18 17:20:49 +0200 | [diff] [blame] | 771 | default: |
| 772 | rc = -EINVAL; |
| 773 | break; |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 774 | } |
| 775 | return rc; |
| 776 | } |
| 777 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 778 | static void sgsn_gtp_tmr_start(struct sgsn_instance *sgi) |
| 779 | { |
Harald Welte | 5608715 | 2010-05-18 18:24:53 +0200 | [diff] [blame] | 780 | struct timeval next; |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 781 | |
| 782 | /* Retrieve next retransmission as struct timeval */ |
| 783 | gtp_retranstimeout(sgi->gsn, &next); |
| 784 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 785 | /* re-schedule the timer */ |
Pablo Neira Ayuso | 840ccf6 | 2011-05-06 12:11:06 +0200 | [diff] [blame] | 786 | osmo_timer_schedule(&sgi->gtp_timer, next.tv_sec, next.tv_usec/1000); |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 787 | } |
| 788 | |
| 789 | /* timer callback for libgtp retransmissions and ping */ |
| 790 | static void sgsn_gtp_tmr_cb(void *data) |
| 791 | { |
| 792 | struct sgsn_instance *sgi = data; |
| 793 | |
| 794 | /* Do all the retransmissions as needed */ |
| 795 | gtp_retrans(sgi->gsn); |
| 796 | |
| 797 | sgsn_gtp_tmr_start(sgi); |
| 798 | } |
| 799 | |
| 800 | int sgsn_gtp_init(struct sgsn_instance *sgi) |
| 801 | { |
| 802 | int rc; |
| 803 | struct gsn_t *gsn; |
| 804 | |
| 805 | rc = gtp_new(&sgi->gsn, sgi->cfg.gtp_statedir, |
| 806 | &sgi->cfg.gtp_listenaddr.sin_addr, GTP_MODE_SGSN); |
| 807 | if (rc) { |
| 808 | LOGP(DGPRS, LOGL_ERROR, "Failed to create GTP: %d\n", rc); |
| 809 | return rc; |
| 810 | } |
| 811 | gsn = sgi->gsn; |
| 812 | |
| 813 | sgi->gtp_fd0.fd = gsn->fd0; |
| 814 | sgi->gtp_fd0.priv_nr = 0; |
| 815 | sgi->gtp_fd0.data = sgi; |
Harald Welte | 15bd924 | 2010-05-18 13:13:11 +0200 | [diff] [blame] | 816 | sgi->gtp_fd0.when = BSC_FD_READ; |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 817 | sgi->gtp_fd0.cb = sgsn_gtp_fd_cb; |
Pablo Neira Ayuso | 04d24cd | 2011-05-06 12:11:23 +0200 | [diff] [blame] | 818 | rc = osmo_fd_register(&sgi->gtp_fd0); |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 819 | if (rc < 0) |
| 820 | return rc; |
| 821 | |
| 822 | sgi->gtp_fd1c.fd = gsn->fd1c; |
| 823 | sgi->gtp_fd1c.priv_nr = 1; |
| 824 | sgi->gtp_fd1c.data = sgi; |
Harald Welte | 15bd924 | 2010-05-18 13:13:11 +0200 | [diff] [blame] | 825 | sgi->gtp_fd1c.when = BSC_FD_READ; |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 826 | sgi->gtp_fd1c.cb = sgsn_gtp_fd_cb; |
Holger Hans Peter Freyther | 44051a2 | 2013-07-04 18:39:02 +0200 | [diff] [blame] | 827 | rc = osmo_fd_register(&sgi->gtp_fd1c); |
| 828 | if (rc < 0) { |
| 829 | osmo_fd_unregister(&sgi->gtp_fd0); |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 830 | return rc; |
Holger Hans Peter Freyther | 44051a2 | 2013-07-04 18:39:02 +0200 | [diff] [blame] | 831 | } |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 832 | |
| 833 | sgi->gtp_fd1u.fd = gsn->fd1u; |
| 834 | sgi->gtp_fd1u.priv_nr = 2; |
| 835 | sgi->gtp_fd1u.data = sgi; |
Harald Welte | 15bd924 | 2010-05-18 13:13:11 +0200 | [diff] [blame] | 836 | sgi->gtp_fd1u.when = BSC_FD_READ; |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 837 | sgi->gtp_fd1u.cb = sgsn_gtp_fd_cb; |
Holger Hans Peter Freyther | 44051a2 | 2013-07-04 18:39:02 +0200 | [diff] [blame] | 838 | rc = osmo_fd_register(&sgi->gtp_fd1u); |
| 839 | if (rc < 0) { |
| 840 | osmo_fd_unregister(&sgi->gtp_fd0); |
| 841 | osmo_fd_unregister(&sgi->gtp_fd1c); |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 842 | return rc; |
Holger Hans Peter Freyther | 44051a2 | 2013-07-04 18:39:02 +0200 | [diff] [blame] | 843 | } |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 844 | |
| 845 | /* Start GTP re-transmission timer */ |
| 846 | sgi->gtp_timer.cb = sgsn_gtp_tmr_cb; |
Harald Welte | b2788dc | 2010-05-18 18:28:13 +0200 | [diff] [blame] | 847 | sgi->gtp_timer.data = sgi; |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 848 | sgsn_gtp_tmr_start(sgi); |
| 849 | |
| 850 | /* Register callbackcs with libgtp */ |
| 851 | gtp_set_cb_delete_context(gsn, cb_delete_context); |
| 852 | gtp_set_cb_conf(gsn, cb_conf); |
Harald Welte | 94ecef3 | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 853 | gtp_set_cb_recovery(gsn, cb_recovery); |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 854 | gtp_set_cb_data_ind(gsn, cb_data_ind); |
| 855 | gtp_set_cb_unsup_ind(gsn, cb_unsup_ind); |
| 856 | gtp_set_cb_extheader_ind(gsn, cb_extheader_ind); |
| 857 | |
| 858 | return 0; |
| 859 | } |