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 | |
Pablo Neira Ayuso | dd5fff4 | 2011-03-22 16:47:59 +0100 | [diff] [blame] | 37 | #include <osmocom/core/talloc.h> |
| 38 | #include <osmocom/core/select.h> |
| 39 | #include <osmocom/core/rate_ctr.h> |
Harald Welte | cfb6b28 | 2012-06-16 14:59:56 +0800 | [diff] [blame] | 40 | #include <osmocom/gprs/gprs_bssgp.h> |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 41 | |
Harald Welte | cfb6b28 | 2012-06-16 14:59:56 +0800 | [diff] [blame] | 42 | #include <openbsc/gsm_04_08_gprs.h> |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 43 | #include <openbsc/signal.h> |
| 44 | #include <openbsc/debug.h> |
| 45 | #include <openbsc/sgsn.h> |
Harald Welte | d0e36dc | 2010-06-01 18:28:10 +0200 | [diff] [blame] | 46 | #include <openbsc/gprs_llc.h> |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 47 | #include <openbsc/gprs_sgsn.h> |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 48 | #include <openbsc/gprs_gmm.h> |
Holger Hans Peter Freyther | 786cfee | 2015-04-23 09:53:53 -0400 | [diff] [blame] | 49 | #include <openbsc/gsm_subscriber.h> |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 50 | |
| 51 | #include <gtp.h> |
| 52 | #include <pdp.h> |
| 53 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 54 | const struct value_string gtp_cause_strs[] = { |
| 55 | { GTPCAUSE_REQ_IMSI, "Request IMSI" }, |
| 56 | { GTPCAUSE_REQ_IMEI, "Request IMEI" }, |
| 57 | { GTPCAUSE_REQ_IMSI_IMEI, "Request IMSI and IMEI" }, |
| 58 | { GTPCAUSE_NO_ID_NEEDED, "No identity needed" }, |
| 59 | { GTPCAUSE_MS_REFUSES_X, "MS refuses" }, |
| 60 | { GTPCAUSE_MS_NOT_RESP_X, "MS is not GPRS responding" }, |
| 61 | { GTPCAUSE_ACC_REQ, "Request accepted" }, |
| 62 | { GTPCAUSE_NON_EXIST, "Non-existent" }, |
| 63 | { GTPCAUSE_INVALID_MESSAGE, "Invalid message format" }, |
| 64 | { GTPCAUSE_IMSI_NOT_KNOWN, "IMSI not known" }, |
| 65 | { GTPCAUSE_MS_DETACHED, "MS is GPRS detached" }, |
| 66 | { GTPCAUSE_MS_NOT_RESP, "MS is not GPRS responding" }, |
| 67 | { GTPCAUSE_MS_REFUSES, "MS refuses" }, |
| 68 | { GTPCAUSE_NO_RESOURCES, "No resources available" }, |
| 69 | { GTPCAUSE_NOT_SUPPORTED, "Service not supported" }, |
| 70 | { GTPCAUSE_MAN_IE_INCORRECT, "Mandatory IE incorrect" }, |
| 71 | { GTPCAUSE_MAN_IE_MISSING, "Mandatory IE missing" }, |
| 72 | { GTPCAUSE_OPT_IE_INCORRECT, "Optional IE incorrect" }, |
| 73 | { GTPCAUSE_SYS_FAIL, "System failure" }, |
| 74 | { GTPCAUSE_ROAMING_REST, "Roaming restrictions" }, |
| 75 | { GTPCAUSE_PTIMSI_MISMATCH, "P-TMSI Signature mismatch" }, |
| 76 | { GTPCAUSE_CONN_SUSP, "GPRS connection suspended" }, |
| 77 | { GTPCAUSE_AUTH_FAIL, "Authentication failure" }, |
| 78 | { GTPCAUSE_USER_AUTH_FAIL, "User authentication failed" }, |
| 79 | { GTPCAUSE_CONTEXT_NOT_FOUND, "Context not found" }, |
| 80 | { GTPCAUSE_ADDR_OCCUPIED, "All dynamic PDP addresses occupied" }, |
| 81 | { GTPCAUSE_NO_MEMORY, "No memory is available" }, |
| 82 | { GTPCAUSE_RELOC_FAIL, "Relocation failure" }, |
| 83 | { GTPCAUSE_UNKNOWN_MAN_EXTHEADER, "Unknown mandatory ext. header" }, |
| 84 | { GTPCAUSE_SEM_ERR_TFT, "Semantic error in TFT operation" }, |
| 85 | { GTPCAUSE_SYN_ERR_TFT, "Syntactic error in TFT operation" }, |
| 86 | { GTPCAUSE_SEM_ERR_FILTER, "Semantic errors in packet filter" }, |
| 87 | { GTPCAUSE_SYN_ERR_FILTER, "Syntactic errors in packet filter" }, |
| 88 | { GTPCAUSE_MISSING_APN, "Missing or unknown APN" }, |
| 89 | { GTPCAUSE_UNKNOWN_PDP, "Unknown PDP address or PDP type" }, |
| 90 | { 0, NULL } |
| 91 | }; |
| 92 | |
Harald Welte | c1920c0 | 2010-07-02 22:47:39 +0200 | [diff] [blame] | 93 | /* Generate the GTP IMSI IE according to 09.60 Section 7.9.2 */ |
| 94 | static uint64_t imsi_str2gtp(char *str) |
| 95 | { |
| 96 | uint64_t imsi64 = 0; |
| 97 | unsigned int n; |
| 98 | unsigned int imsi_len = strlen(str); |
| 99 | |
| 100 | if (imsi_len > 16) { |
| 101 | LOGP(DGPRS, LOGL_NOTICE, "IMSI length > 16 not supported!\n"); |
| 102 | return 0; |
| 103 | } |
| 104 | |
| 105 | for (n = 0; n < 16; n++) { |
| 106 | uint64_t val; |
| 107 | if (n < imsi_len) |
| 108 | val = (str[n]-'0') & 0xf; |
| 109 | else |
| 110 | val = 0xf; |
| 111 | imsi64 |= (val << (n*4)); |
| 112 | } |
| 113 | return imsi64; |
| 114 | } |
| 115 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 116 | /* generate a PDP context based on the IE's from the 04.08 message, |
| 117 | * and send the GTP create pdp context request to the GGSN */ |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 118 | 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] | 119 | struct sgsn_mm_ctx *mmctx, |
| 120 | uint16_t nsapi, |
| 121 | struct tlv_parsed *tp) |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 122 | { |
Holger Hans Peter Freyther | 4198b79 | 2015-05-17 17:36:23 +0200 | [diff] [blame] | 123 | struct gprs_ra_id raid; |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 124 | struct sgsn_pdp_ctx *pctx; |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 125 | struct pdp_t *pdp; |
Harald Welte | c1920c0 | 2010-07-02 22:47:39 +0200 | [diff] [blame] | 126 | uint64_t imsi_ui64; |
Holger Hans Peter Freyther | 532b09d | 2015-04-23 11:33:35 -0400 | [diff] [blame] | 127 | size_t qos_len; |
| 128 | const uint8_t *qos; |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 129 | int rc; |
| 130 | |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 131 | LOGP(DGPRS, LOGL_ERROR, "Create PDP Context\n"); |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 132 | pctx = sgsn_pdp_ctx_alloc(mmctx, nsapi); |
| 133 | if (!pctx) { |
| 134 | LOGP(DGPRS, LOGL_ERROR, "Couldn't allocate PDP Ctx\n"); |
| 135 | return NULL; |
| 136 | } |
| 137 | |
Harald Welte | c1920c0 | 2010-07-02 22:47:39 +0200 | [diff] [blame] | 138 | imsi_ui64 = imsi_str2gtp(mmctx->imsi); |
| 139 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 140 | rc = pdp_newpdp(&pdp, imsi_ui64, nsapi, NULL); |
| 141 | if (rc) { |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 142 | LOGP(DGPRS, LOGL_ERROR, "Out of libgtp PDP Contexts\n"); |
| 143 | return NULL; |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 144 | } |
Harald Welte | ef1bef7 | 2010-06-03 06:38:38 +0200 | [diff] [blame] | 145 | pdp->priv = pctx; |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 146 | pctx->lib = pdp; |
| 147 | pctx->ggsn = ggsn; |
| 148 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 149 | //pdp->peer = /* sockaddr_in of GGSN (receive) */ |
| 150 | //pdp->ipif = /* not used by library */ |
| 151 | pdp->version = ggsn->gtp_version; |
| 152 | pdp->hisaddr0 = ggsn->remote_addr; |
| 153 | pdp->hisaddr1 = ggsn->remote_addr; |
| 154 | //pdp->cch_pdp = 512; /* Charging Flat Rate */ |
| 155 | |
Holger Hans Peter Freyther | 604ead0 | 2015-05-22 10:03:21 +0800 | [diff] [blame] | 156 | /* MS provided APN, subscription was verified by the caller */ |
| 157 | pdp->selmode = 0xFC | 0x00; |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 158 | |
| 159 | /* IMSI, TEID/TEIC, FLLU/FLLC, TID, NSAPI set in pdp_newpdp */ |
| 160 | |
Holger Hans Peter Freyther | 786cfee | 2015-04-23 09:53:53 -0400 | [diff] [blame] | 161 | /* Put the MSISDN in case we have it */ |
| 162 | if (mmctx->subscr) { |
| 163 | pdp->msisdn.l = mmctx->subscr->sgsn_data->msisdn_len; |
| 164 | if (pdp->msisdn.l > sizeof(pdp->msisdn.v)) |
Holger Hans Peter Freyther | 4a091e3 | 2015-10-12 10:43:17 +0200 | [diff] [blame] | 165 | pdp->msisdn.l = sizeof(pdp->msisdn.v); |
Holger Hans Peter Freyther | 786cfee | 2015-04-23 09:53:53 -0400 | [diff] [blame] | 166 | memcpy(pdp->msisdn.v, mmctx->subscr->sgsn_data->msisdn, |
| 167 | pdp->msisdn.l); |
| 168 | } |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 169 | |
| 170 | /* End User Address from GMM requested PDP address */ |
| 171 | pdp->eua.l = TLVP_LEN(tp, OSMO_IE_GSM_REQ_PDP_ADDR); |
| 172 | if (pdp->eua.l > sizeof(pdp->eua.v)) |
| 173 | pdp->eua.l = sizeof(pdp->eua.v); |
| 174 | memcpy(pdp->eua.v, TLVP_VAL(tp, OSMO_IE_GSM_REQ_PDP_ADDR), |
| 175 | pdp->eua.l); |
| 176 | /* Highest 4 bits of first byte need to be set to 1, otherwise |
| 177 | * the IE is identical with the 04.08 PDP Address IE */ |
| 178 | pdp->eua.v[0] |= 0xf0; |
| 179 | |
| 180 | /* APN name from GMM */ |
| 181 | pdp->apn_use.l = TLVP_LEN(tp, GSM48_IE_GSM_APN); |
| 182 | if (pdp->apn_use.l > sizeof(pdp->apn_use.v)) |
| 183 | pdp->apn_use.l = sizeof(pdp->apn_use.v); |
| 184 | memcpy(pdp->apn_use.v, TLVP_VAL(tp, GSM48_IE_GSM_APN), |
| 185 | pdp->apn_use.l); |
| 186 | |
| 187 | /* Protocol Configuration Options from GMM */ |
| 188 | pdp->pco_req.l = TLVP_LEN(tp, GSM48_IE_GSM_PROTO_CONF_OPT); |
| 189 | if (pdp->pco_req.l > sizeof(pdp->pco_req.v)) |
| 190 | pdp->pco_req.l = sizeof(pdp->pco_req.v); |
| 191 | memcpy(pdp->pco_req.v, TLVP_VAL(tp, GSM48_IE_GSM_PROTO_CONF_OPT), |
| 192 | pdp->pco_req.l); |
| 193 | |
Holger Hans Peter Freyther | 532b09d | 2015-04-23 11:33:35 -0400 | [diff] [blame] | 194 | /* QoS options from GMM or remote */ |
| 195 | if (TLVP_LEN(tp, OSMO_IE_GSM_SUB_QOS) > 0) { |
| 196 | qos_len = TLVP_LEN(tp, OSMO_IE_GSM_SUB_QOS); |
| 197 | qos = TLVP_VAL(tp, OSMO_IE_GSM_SUB_QOS); |
| 198 | } else { |
| 199 | qos_len = TLVP_LEN(tp, OSMO_IE_GSM_REQ_QOS); |
| 200 | qos = TLVP_VAL(tp, OSMO_IE_GSM_REQ_QOS); |
| 201 | } |
| 202 | |
Holger Hans Peter Freyther | 05f7b04 | 2015-04-23 11:50:41 -0400 | [diff] [blame] | 203 | if (qos_len <= 3) { |
| 204 | pdp->qos_req.l = qos_len + 1; |
| 205 | if (pdp->qos_req.l > sizeof(pdp->qos_req.v)) |
| 206 | pdp->qos_req.l = sizeof(pdp->qos_req.v); |
| 207 | pdp->qos_req.v[0] = 0; /* Allocation/Retention policy */ |
| 208 | memcpy(&pdp->qos_req.v[1], qos, pdp->qos_req.l - 1); |
| 209 | } else { |
| 210 | pdp->qos_req.l = qos_len; |
| 211 | if (pdp->qos_req.l > sizeof(pdp->qos_req.v)) |
| 212 | pdp->qos_req.l = sizeof(pdp->qos_req.v); |
| 213 | memcpy(pdp->qos_req.v, qos, pdp->qos_req.l); |
| 214 | } |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 215 | |
| 216 | /* SGSN address for control plane */ |
Harald Welte | aff6aeb | 2010-06-02 23:17:33 +0200 | [diff] [blame] | 217 | pdp->gsnlc.l = sizeof(sgsn->cfg.gtp_listenaddr.sin_addr); |
| 218 | memcpy(pdp->gsnlc.v, &sgsn->cfg.gtp_listenaddr.sin_addr, |
| 219 | sizeof(sgsn->cfg.gtp_listenaddr.sin_addr)); |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 220 | |
| 221 | /* SGSN address for user plane */ |
Harald Welte | aff6aeb | 2010-06-02 23:17:33 +0200 | [diff] [blame] | 222 | pdp->gsnlu.l = sizeof(sgsn->cfg.gtp_listenaddr.sin_addr); |
| 223 | memcpy(pdp->gsnlu.v, &sgsn->cfg.gtp_listenaddr.sin_addr, |
| 224 | sizeof(sgsn->cfg.gtp_listenaddr.sin_addr)); |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 225 | |
Holger Hans Peter Freyther | 0d5ee64 | 2015-04-22 21:40:39 -0400 | [diff] [blame] | 226 | /* Assume we are a GERAN system */ |
| 227 | pdp->rattype.l = 1; |
| 228 | pdp->rattype.v[0] = 2; |
| 229 | pdp->rattype_given = 1; |
| 230 | |
Holger Hans Peter Freyther | a8b5030 | 2015-05-12 22:00:22 +0200 | [diff] [blame] | 231 | /* Include RAI and ULI all the time */ |
Holger Hans Peter Freyther | 293b821 | 2015-05-12 21:46:58 +0200 | [diff] [blame] | 232 | pdp->rai_given = 1; |
| 233 | pdp->rai.l = 6; |
Holger Hans Peter Freyther | 4198b79 | 2015-05-17 17:36:23 +0200 | [diff] [blame] | 234 | raid = mmctx->ra; |
| 235 | raid.lac = 0xFFFE; |
| 236 | raid.rac = 0xFF; |
| 237 | gsm48_construct_ra(pdp->rai.v, &raid); |
Holger Hans Peter Freyther | 293b821 | 2015-05-12 21:46:58 +0200 | [diff] [blame] | 238 | |
Holger Hans Peter Freyther | a8b5030 | 2015-05-12 22:00:22 +0200 | [diff] [blame] | 239 | pdp->userloc_given = 1; |
| 240 | pdp->userloc.l = 8; |
| 241 | pdp->userloc.v[0] = 0; /* CGI for GERAN */ |
| 242 | bssgp_create_cell_id(&pdp->userloc.v[1], &mmctx->ra, mmctx->cell_id); |
| 243 | |
Holger Hans Peter Freyther | 3f1e772 | 2015-05-12 22:20:05 +0200 | [diff] [blame] | 244 | /* include the IMEI(SV) */ |
| 245 | pdp->imeisv_given = 1; |
| 246 | gsm48_encode_bcd_number(&pdp->imeisv.v[0], 8, 0, mmctx->imei); |
| 247 | pdp->imeisv.l = pdp->imeisv.v[0]; |
| 248 | memmove(&pdp->imeisv.v[0], &pdp->imeisv.v[1], 8); |
| 249 | |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 250 | /* change pdp state to 'requested' */ |
| 251 | pctx->state = PDP_STATE_CR_REQ; |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 252 | |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 253 | rc = gtp_create_context_req(ggsn->gsn, pdp, pctx); |
| 254 | /* FIXME */ |
| 255 | |
| 256 | return pctx; |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 257 | } |
| 258 | |
Harald Welte | f28e1a0 | 2010-12-24 19:21:13 +0100 | [diff] [blame] | 259 | /* SGSN wants to delete a PDP context */ |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 260 | int sgsn_delete_pdp_ctx(struct sgsn_pdp_ctx *pctx) |
| 261 | { |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 262 | LOGPDPCTXP(LOGL_ERROR, pctx, "Delete PDP Context\n"); |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 263 | |
| 264 | /* FIXME: decide if we need teardown or not ! */ |
| 265 | return gtp_delete_context_req(pctx->ggsn->gsn, pctx->lib, pctx, 1); |
| 266 | } |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 267 | |
| 268 | struct cause_map { |
| 269 | uint8_t cause_in; |
| 270 | uint8_t cause_out; |
| 271 | }; |
| 272 | |
| 273 | static uint8_t cause_map(const struct cause_map *map, uint8_t in, uint8_t deflt) |
| 274 | { |
| 275 | const struct cause_map *m; |
| 276 | |
| 277 | for (m = map; m->cause_in && m->cause_out; m++) { |
| 278 | if (m->cause_in == in) |
| 279 | return m->cause_out; |
| 280 | } |
| 281 | return deflt; |
| 282 | } |
| 283 | |
| 284 | /* how do we map from gtp cause to SM cause */ |
| 285 | static const struct cause_map gtp2sm_cause_map[] = { |
| 286 | { GTPCAUSE_NO_RESOURCES, GSM_CAUSE_INSUFF_RSRC }, |
| 287 | { GTPCAUSE_NOT_SUPPORTED, GSM_CAUSE_SERV_OPT_NOTSUPP }, |
| 288 | { GTPCAUSE_MAN_IE_INCORRECT, GSM_CAUSE_INV_MAND_INFO }, |
| 289 | { GTPCAUSE_MAN_IE_MISSING, GSM_CAUSE_INV_MAND_INFO }, |
| 290 | { GTPCAUSE_OPT_IE_INCORRECT, GSM_CAUSE_PROTO_ERR_UNSPEC }, |
| 291 | { GTPCAUSE_SYS_FAIL, GSM_CAUSE_NET_FAIL }, |
| 292 | { GTPCAUSE_ROAMING_REST, GSM_CAUSE_REQ_SERV_OPT_NOTSUB }, |
| 293 | { GTPCAUSE_PTIMSI_MISMATCH, GSM_CAUSE_PROTO_ERR_UNSPEC }, |
| 294 | { GTPCAUSE_CONN_SUSP, GSM_CAUSE_PROTO_ERR_UNSPEC }, |
| 295 | { GTPCAUSE_AUTH_FAIL, GSM_CAUSE_AUTH_FAILED }, |
| 296 | { GTPCAUSE_USER_AUTH_FAIL, GSM_CAUSE_ACT_REJ_GGSN }, |
| 297 | { GTPCAUSE_CONTEXT_NOT_FOUND, GSM_CAUSE_PROTO_ERR_UNSPEC }, |
| 298 | { GTPCAUSE_ADDR_OCCUPIED, GSM_CAUSE_INSUFF_RSRC }, |
| 299 | { GTPCAUSE_NO_MEMORY, GSM_CAUSE_INSUFF_RSRC }, |
| 300 | { GTPCAUSE_RELOC_FAIL, GSM_CAUSE_PROTO_ERR_UNSPEC }, |
| 301 | { GTPCAUSE_UNKNOWN_MAN_EXTHEADER, GSM_CAUSE_PROTO_ERR_UNSPEC }, |
| 302 | { GTPCAUSE_MISSING_APN, GSM_CAUSE_MISSING_APN }, |
| 303 | { GTPCAUSE_UNKNOWN_PDP, GSM_CAUSE_UNKNOWN_PDP }, |
| 304 | { 0, 0 } |
| 305 | }; |
| 306 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 307 | /* The GGSN has confirmed the creation of a PDP Context */ |
| 308 | static int create_pdp_conf(struct pdp_t *pdp, void *cbp, int cause) |
| 309 | { |
Holger Hans Peter Freyther | f14098a | 2015-05-02 19:55:38 +0200 | [diff] [blame] | 310 | struct sgsn_signal_data sig_data; |
Harald Welte | c1f6bfe | 2010-05-17 22:58:03 +0200 | [diff] [blame] | 311 | struct sgsn_pdp_ctx *pctx = cbp; |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 312 | uint8_t reject_cause; |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 313 | |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 314 | 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] | 315 | cause, get_value_string(gtp_cause_strs, cause)); |
| 316 | |
Jacob Erlbeck | d781c7a | 2014-10-13 10:32:00 +0200 | [diff] [blame] | 317 | if (!pctx->mm) { |
| 318 | LOGP(DGPRS, LOGL_INFO, |
| 319 | "No MM context, aborting CREATE PDP CTX CONF\n"); |
| 320 | return -EIO; |
| 321 | } |
| 322 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 323 | /* Check for cause value if it was really successful */ |
| 324 | if (cause < 0) { |
| 325 | LOGP(DGPRS, LOGL_NOTICE, "Create PDP ctx req timed out\n"); |
Harald Welte | a640f13 | 2010-06-01 11:52:41 +0200 | [diff] [blame] | 326 | if (pdp && pdp->version == 1) { |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 327 | pdp->version = 0; |
Harald Welte | 17072d1 | 2010-05-17 00:53:10 +0200 | [diff] [blame] | 328 | gtp_create_context_req(sgsn->gsn, pdp, cbp); |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 329 | return 0; |
| 330 | } else { |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 331 | reject_cause = GSM_CAUSE_NET_FAIL; |
| 332 | goto reject; |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 333 | } |
| 334 | } |
| 335 | |
| 336 | /* Check for cause value if it was really successful */ |
| 337 | if (cause != GTPCAUSE_ACC_REQ) { |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 338 | reject_cause = cause_map(gtp2sm_cause_map, cause, |
| 339 | GSM_CAUSE_ACT_REJ_GGSN); |
| 340 | goto reject; |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 341 | } |
| 342 | |
Harald Welte | d0e36dc | 2010-06-01 18:28:10 +0200 | [diff] [blame] | 343 | /* Activate the SNDCP layer */ |
| 344 | sndcp_sm_activate_ind(&pctx->mm->llme->lle[pctx->sapi], pctx->nsapi); |
| 345 | |
Holger Hans Peter Freyther | f14098a | 2015-05-02 19:55:38 +0200 | [diff] [blame] | 346 | /* Inform others about it */ |
| 347 | memset(&sig_data, 0, sizeof(sig_data)); |
| 348 | sig_data.pdp = pctx; |
| 349 | osmo_signal_dispatch(SS_SGSN, S_SGSN_PDP_ACT, &sig_data); |
| 350 | |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 351 | /* Send PDP CTX ACT to MS */ |
| 352 | return gsm48_tx_gsm_act_pdp_acc(pctx); |
| 353 | |
| 354 | reject: |
Holger Hans Peter Freyther | 7e066c1 | 2013-07-30 08:45:29 +0200 | [diff] [blame] | 355 | /* |
| 356 | * In case of a timeout pdp will be NULL but we have a valid pointer |
| 357 | * in pctx->lib. For other rejects pctx->lib and pdp might be the |
| 358 | * same. |
| 359 | */ |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 360 | pctx->state = PDP_STATE_NONE; |
Holger Hans Peter Freyther | 7e066c1 | 2013-07-30 08:45:29 +0200 | [diff] [blame] | 361 | if (pctx->lib && pctx->lib != pdp) |
| 362 | pdp_freepdp(pctx->lib); |
| 363 | pctx->lib = NULL; |
| 364 | |
Harald Welte | a640f13 | 2010-06-01 11:52:41 +0200 | [diff] [blame] | 365 | if (pdp) |
| 366 | pdp_freepdp(pdp); |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 367 | /* Send PDP CTX ACT REJ to MS */ |
Holger Hans Peter Freyther | 511c31f | 2014-04-04 12:49:00 +0200 | [diff] [blame] | 368 | gsm48_tx_gsm_act_pdp_rej(pctx->mm, pctx->ti, reject_cause, |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 369 | 0, NULL); |
Harald Welte | 4aa4148 | 2010-06-02 10:09:50 +0200 | [diff] [blame] | 370 | sgsn_pdp_ctx_free(pctx); |
Harald Welte | 29d838e | 2010-05-18 10:35:06 +0200 | [diff] [blame] | 371 | |
| 372 | return EOF; |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 373 | } |
| 374 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 375 | /* Confirmation of a PDP Context Delete */ |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 376 | 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] | 377 | { |
Holger Hans Peter Freyther | f14098a | 2015-05-02 19:55:38 +0200 | [diff] [blame] | 378 | struct sgsn_signal_data sig_data; |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 379 | struct sgsn_pdp_ctx *pctx = cbp; |
Jacob Erlbeck | d781c7a | 2014-10-13 10:32:00 +0200 | [diff] [blame] | 380 | int rc = 0; |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 381 | |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 382 | 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] | 383 | cause, get_value_string(gtp_cause_strs, cause)); |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 384 | |
Holger Hans Peter Freyther | f14098a | 2015-05-02 19:55:38 +0200 | [diff] [blame] | 385 | memset(&sig_data, 0, sizeof(sig_data)); |
| 386 | sig_data.pdp = pctx; |
| 387 | osmo_signal_dispatch(SS_SGSN, S_SGSN_PDP_DEACT, &sig_data); |
| 388 | |
Jacob Erlbeck | d781c7a | 2014-10-13 10:32:00 +0200 | [diff] [blame] | 389 | if (pctx->mm) { |
| 390 | /* Deactivate the SNDCP layer */ |
| 391 | sndcp_sm_deactivate_ind(&pctx->mm->llme->lle[pctx->sapi], pctx->nsapi); |
Harald Welte | 502e8a5 | 2010-06-28 22:21:57 +0200 | [diff] [blame] | 392 | |
Jacob Erlbeck | d781c7a | 2014-10-13 10:32:00 +0200 | [diff] [blame] | 393 | /* Confirm deactivation of PDP context to MS */ |
| 394 | rc = gsm48_tx_gsm_deact_pdp_acc(pctx); |
| 395 | } else { |
| 396 | LOGPDPCTXP(LOGL_NOTICE, pctx, |
| 397 | "Not deactivating SNDCP layer since the MM context " |
| 398 | "is not available\n"); |
| 399 | } |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 400 | |
Harald Welte | 095b3de | 2012-07-14 12:15:19 +0200 | [diff] [blame] | 401 | /* unlink the now non-existing library handle from the pdp |
| 402 | * context */ |
| 403 | pctx->lib = NULL; |
| 404 | |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 405 | sgsn_pdp_ctx_free(pctx); |
| 406 | |
| 407 | return rc; |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 408 | } |
| 409 | |
| 410 | /* Confirmation of an GTP ECHO request */ |
Harald Welte | 94ecef3 | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 411 | static int echo_conf(struct pdp_t *pdp, void *cbp, int recovery) |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 412 | { |
| 413 | if (recovery < 0) { |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 414 | LOGP(DGPRS, LOGL_NOTICE, "GTP Echo Request timed out\n"); |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 415 | /* FIXME: if version == 1, retry with version 0 */ |
| 416 | } else { |
| 417 | DEBUGP(DGPRS, "GTP Rx Echo Response\n"); |
Harald Welte | 94ecef3 | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 418 | } |
| 419 | return 0; |
| 420 | } |
| 421 | |
| 422 | /* Any message received by GGSN contains a recovery IE */ |
| 423 | static int cb_recovery(struct sockaddr_in *peer, uint8_t recovery) |
| 424 | { |
| 425 | struct sgsn_ggsn_ctx *ggsn; |
| 426 | |
| 427 | ggsn = sgsn_ggsn_ctx_by_addr(&peer->sin_addr); |
| 428 | if (!ggsn) { |
Daniel Willmann | c9ac973 | 2014-09-03 17:46:44 +0200 | [diff] [blame] | 429 | LOGP(DGPRS, LOGL_NOTICE, "Received Recovery IE for unknown GGSN\n"); |
Harald Welte | 94ecef3 | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 430 | return -EINVAL; |
| 431 | } |
| 432 | |
| 433 | if (ggsn->remote_restart_ctr == -1) { |
| 434 | /* First received ECHO RESPONSE, note the restart ctr */ |
| 435 | ggsn->remote_restart_ctr = recovery; |
| 436 | } else if (ggsn->remote_restart_ctr != recovery) { |
| 437 | /* counter has changed (GGSN restart): release all PDP */ |
| 438 | LOGP(DGPRS, LOGL_NOTICE, "GGSN recovery (%u->%u), " |
| 439 | "releasing all PDP contexts\n", |
| 440 | ggsn->remote_restart_ctr, recovery); |
| 441 | ggsn->remote_restart_ctr = recovery; |
| 442 | drop_all_pdp_for_ggsn(ggsn); |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 443 | } |
| 444 | return 0; |
| 445 | } |
| 446 | |
| 447 | /* libgtp callback for confirmations */ |
| 448 | static int cb_conf(int type, int cause, struct pdp_t *pdp, void *cbp) |
| 449 | { |
| 450 | DEBUGP(DGPRS, "libgtp cb_conf(type=%d, cause=%d, pdp=%p, cbp=%p)\n", |
| 451 | type, cause, pdp, cbp); |
| 452 | |
| 453 | if (cause == EOF) |
| 454 | LOGP(DGPRS, LOGL_ERROR, "libgtp EOF (type=%u, pdp=%p, cbp=%p)\n", |
| 455 | type, pdp, cbp); |
| 456 | |
| 457 | switch (type) { |
| 458 | case GTP_ECHO_REQ: |
Harald Welte | f28e1a0 | 2010-12-24 19:21:13 +0100 | [diff] [blame] | 459 | /* libgtp hands us the RECOVERY number instead of a cause */ |
Harald Welte | 94ecef3 | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 460 | return echo_conf(pdp, cbp, cause); |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 461 | case GTP_CREATE_PDP_REQ: |
| 462 | return create_pdp_conf(pdp, cbp, cause); |
| 463 | case GTP_DELETE_PDP_REQ: |
Harald Welte | eb471c9 | 2010-05-18 14:32:29 +0200 | [diff] [blame] | 464 | return delete_pdp_conf(pdp, cbp, cause); |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 465 | default: |
| 466 | break; |
| 467 | } |
| 468 | return 0; |
| 469 | } |
| 470 | |
| 471 | /* Called whenever a PDP context is deleted for any reason */ |
| 472 | static int cb_delete_context(struct pdp_t *pdp) |
| 473 | { |
| 474 | LOGP(DGPRS, LOGL_INFO, "PDP Context was deleted\n"); |
| 475 | return 0; |
| 476 | } |
| 477 | |
| 478 | /* Called when we receive a Version Not Supported message */ |
| 479 | static int cb_unsup_ind(struct sockaddr_in *peer) |
| 480 | { |
| 481 | LOGP(DGPRS, LOGL_INFO, "GTP Version not supported Indication " |
| 482 | "from %s:%u\n", inet_ntoa(peer->sin_addr), |
| 483 | ntohs(peer->sin_port)); |
| 484 | return 0; |
| 485 | } |
| 486 | |
| 487 | /* Called when we receive a Supported Ext Headers Notification */ |
| 488 | static int cb_extheader_ind(struct sockaddr_in *peer) |
| 489 | { |
| 490 | LOGP(DGPRS, LOGL_INFO, "GTP Supported Ext Headers Noficiation " |
| 491 | "from %s:%u\n", inet_ntoa(peer->sin_addr), |
| 492 | ntohs(peer->sin_port)); |
| 493 | return 0; |
| 494 | } |
| 495 | |
| 496 | /* Called whenever we recive a DATA packet */ |
Harald Welte | ef1bef7 | 2010-06-03 06:38:38 +0200 | [diff] [blame] | 497 | 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] | 498 | { |
Harald Welte | 92f27a9 | 2010-06-09 16:22:28 +0200 | [diff] [blame] | 499 | struct bssgp_paging_info pinfo; |
Harald Welte | ef1bef7 | 2010-06-03 06:38:38 +0200 | [diff] [blame] | 500 | struct sgsn_pdp_ctx *pdp; |
Harald Welte | 92f27a9 | 2010-06-09 16:22:28 +0200 | [diff] [blame] | 501 | struct sgsn_mm_ctx *mm; |
| 502 | struct msgb *msg; |
Harald Welte | ef1bef7 | 2010-06-03 06:38:38 +0200 | [diff] [blame] | 503 | uint8_t *ud; |
| 504 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 505 | DEBUGP(DGPRS, "GTP DATA IND from GGSN, length=%u\n", len); |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 506 | |
Harald Welte | ef1bef7 | 2010-06-03 06:38:38 +0200 | [diff] [blame] | 507 | pdp = lib->priv; |
| 508 | if (!pdp) { |
Harald Welte | 095b3de | 2012-07-14 12:15:19 +0200 | [diff] [blame] | 509 | LOGP(DGPRS, LOGL_NOTICE, |
| 510 | "GTP DATA IND from GGSN for unknown PDP\n"); |
Harald Welte | ef1bef7 | 2010-06-03 06:38:38 +0200 | [diff] [blame] | 511 | return -EIO; |
| 512 | } |
Harald Welte | 92f27a9 | 2010-06-09 16:22:28 +0200 | [diff] [blame] | 513 | mm = pdp->mm; |
Harald Welte | 095b3de | 2012-07-14 12:15:19 +0200 | [diff] [blame] | 514 | if (!mm) { |
| 515 | LOGP(DGPRS, LOGL_ERROR, |
| 516 | "PDP context (imsi=%s) without MM context!\n", mm->imsi); |
| 517 | return -EIO; |
| 518 | } |
Harald Welte | ef1bef7 | 2010-06-03 06:38:38 +0200 | [diff] [blame] | 519 | |
Sylvain Munaut | b59499b | 2010-06-09 20:49:24 +0200 | [diff] [blame] | 520 | msg = msgb_alloc_headroom(len+256, 128, "GTP->SNDCP"); |
Harald Welte | ef1bef7 | 2010-06-03 06:38:38 +0200 | [diff] [blame] | 521 | ud = msgb_put(msg, len); |
| 522 | memcpy(ud, packet, len); |
| 523 | |
Harald Welte | 92f27a9 | 2010-06-09 16:22:28 +0200 | [diff] [blame] | 524 | msgb_tlli(msg) = mm->tlli; |
| 525 | msgb_bvci(msg) = mm->bvci; |
| 526 | msgb_nsei(msg) = mm->nsei; |
Harald Welte | ef1bef7 | 2010-06-03 06:38:38 +0200 | [diff] [blame] | 527 | |
Harald Welte | 92f27a9 | 2010-06-09 16:22:28 +0200 | [diff] [blame] | 528 | switch (mm->mm_state) { |
| 529 | case GMM_REGISTERED_SUSPENDED: |
| 530 | /* initiate PS PAGING procedure */ |
| 531 | memset(&pinfo, 0, sizeof(pinfo)); |
| 532 | pinfo.mode = BSSGP_PAGING_PS; |
| 533 | pinfo.scope = BSSGP_PAGING_BVCI; |
| 534 | pinfo.bvci = mm->bvci; |
| 535 | pinfo.imsi = mm->imsi; |
Harald Welte | f81c3c8 | 2010-07-01 11:53:25 +0200 | [diff] [blame] | 536 | pinfo.ptmsi = &mm->p_tmsi; |
Harald Welte | 92f27a9 | 2010-06-09 16:22:28 +0200 | [diff] [blame] | 537 | pinfo.drx_params = mm->drx_parms; |
| 538 | pinfo.qos[0] = 0; // FIXME |
Holger Hans Peter Freyther | 511c31f | 2014-04-04 12:49:00 +0200 | [diff] [blame] | 539 | bssgp_tx_paging(mm->nsei, 0, &pinfo); |
Harald Welte | 0fe506b | 2010-06-10 00:20:12 +0200 | [diff] [blame] | 540 | rate_ctr_inc(&mm->ctrg->ctr[GMM_CTR_PAGING_PS]); |
Harald Welte | 92f27a9 | 2010-06-09 16:22:28 +0200 | [diff] [blame] | 541 | /* FIXME: queue the packet we received from GTP */ |
| 542 | break; |
| 543 | case GMM_REGISTERED_NORMAL: |
| 544 | break; |
| 545 | default: |
| 546 | LOGP(DGPRS, LOGL_ERROR, "GTP DATA IND for TLLI %08X in state " |
| 547 | "%u\n", mm->tlli, mm->mm_state); |
| 548 | msgb_free(msg); |
| 549 | return -1; |
| 550 | } |
| 551 | |
Harald Welte | 0fe506b | 2010-06-10 00:20:12 +0200 | [diff] [blame] | 552 | rate_ctr_inc(&pdp->ctrg->ctr[PDP_CTR_PKTS_UDATA_OUT]); |
| 553 | rate_ctr_add(&pdp->ctrg->ctr[PDP_CTR_BYTES_UDATA_OUT], len); |
| 554 | rate_ctr_inc(&mm->ctrg->ctr[GMM_CTR_PKTS_UDATA_OUT]); |
| 555 | rate_ctr_add(&mm->ctrg->ctr[GMM_CTR_BYTES_UDATA_OUT], len); |
| 556 | |
Holger Hans Peter Freyther | 33d469b | 2015-05-05 22:25:48 +0200 | [diff] [blame] | 557 | /* It is easier to have a global count */ |
| 558 | pdp->cdr_bytes_out += len; |
| 559 | |
Harald Welte | 92f27a9 | 2010-06-09 16:22:28 +0200 | [diff] [blame] | 560 | return sndcp_unitdata_req(msg, &mm->llme->lle[pdp->sapi], |
| 561 | pdp->nsapi, mm); |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 562 | } |
| 563 | |
Harald Welte | d0e36dc | 2010-06-01 18:28:10 +0200 | [diff] [blame] | 564 | /* Called by SNDCP when it has received/re-assembled a N-PDU */ |
Harald Welte | 3322cb3 | 2010-07-01 19:56:19 +0200 | [diff] [blame] | 565 | int sgsn_rx_sndcp_ud_ind(struct gprs_ra_id *ra_id, int32_t tlli, uint8_t nsapi, |
| 566 | struct msgb *msg, uint32_t npdu_len, uint8_t *npdu) |
Harald Welte | d0e36dc | 2010-06-01 18:28:10 +0200 | [diff] [blame] | 567 | { |
| 568 | struct sgsn_mm_ctx *mmctx; |
| 569 | struct sgsn_pdp_ctx *pdp; |
Harald Welte | d0e36dc | 2010-06-01 18:28:10 +0200 | [diff] [blame] | 570 | |
| 571 | /* look-up the MM context for this message */ |
Harald Welte | 3322cb3 | 2010-07-01 19:56:19 +0200 | [diff] [blame] | 572 | mmctx = sgsn_mm_ctx_by_tlli(tlli, ra_id); |
Harald Welte | d0e36dc | 2010-06-01 18:28:10 +0200 | [diff] [blame] | 573 | if (!mmctx) { |
| 574 | LOGP(DGPRS, LOGL_ERROR, |
| 575 | "Cannot find MM CTX for TLLI %08x\n", tlli); |
| 576 | return -EIO; |
| 577 | } |
| 578 | /* look-up the PDP context for this message */ |
| 579 | pdp = sgsn_pdp_ctx_by_nsapi(mmctx, nsapi); |
| 580 | if (!pdp) { |
| 581 | LOGP(DGPRS, LOGL_ERROR, "Cannot find PDP CTX for " |
| 582 | "TLLI=%08x, NSAPI=%u\n", tlli, nsapi); |
| 583 | return -EIO; |
| 584 | } |
| 585 | if (!pdp->lib) { |
| 586 | LOGP(DGPRS, LOGL_ERROR, "PDP CTX without libgtp\n"); |
| 587 | return -EIO; |
| 588 | } |
Harald Welte | 0fe506b | 2010-06-10 00:20:12 +0200 | [diff] [blame] | 589 | |
| 590 | rate_ctr_inc(&pdp->ctrg->ctr[PDP_CTR_PKTS_UDATA_IN]); |
| 591 | rate_ctr_add(&pdp->ctrg->ctr[PDP_CTR_BYTES_UDATA_IN], npdu_len); |
| 592 | rate_ctr_inc(&mmctx->ctrg->ctr[GMM_CTR_PKTS_UDATA_IN]); |
| 593 | rate_ctr_add(&mmctx->ctrg->ctr[GMM_CTR_BYTES_UDATA_IN], npdu_len); |
| 594 | |
Holger Hans Peter Freyther | 33d469b | 2015-05-05 22:25:48 +0200 | [diff] [blame] | 595 | /* It is easier to have a global count */ |
| 596 | pdp->cdr_bytes_in += npdu_len; |
| 597 | |
Harald Welte | 0fe506b | 2010-06-10 00:20:12 +0200 | [diff] [blame] | 598 | return gtp_data_req(pdp->ggsn->gsn, pdp->lib, npdu, npdu_len); |
Harald Welte | d0e36dc | 2010-06-01 18:28:10 +0200 | [diff] [blame] | 599 | } |
| 600 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 601 | /* libgtp select loop integration */ |
Pablo Neira Ayuso | 04d24cd | 2011-05-06 12:11:23 +0200 | [diff] [blame] | 602 | 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] | 603 | { |
| 604 | struct sgsn_instance *sgi = fd->data; |
| 605 | int rc; |
| 606 | |
| 607 | if (!(what & BSC_FD_READ)) |
| 608 | return 0; |
| 609 | |
| 610 | switch (fd->priv_nr) { |
| 611 | case 0: |
| 612 | rc = gtp_decaps0(sgi->gsn); |
| 613 | break; |
| 614 | case 1: |
| 615 | rc = gtp_decaps1c(sgi->gsn); |
| 616 | break; |
| 617 | case 2: |
| 618 | rc = gtp_decaps1u(sgi->gsn); |
| 619 | break; |
Harald Welte | 50d44fe | 2010-05-18 17:20:49 +0200 | [diff] [blame] | 620 | default: |
| 621 | rc = -EINVAL; |
| 622 | break; |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 623 | } |
| 624 | return rc; |
| 625 | } |
| 626 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 627 | static void sgsn_gtp_tmr_start(struct sgsn_instance *sgi) |
| 628 | { |
Harald Welte | 5608715 | 2010-05-18 18:24:53 +0200 | [diff] [blame] | 629 | struct timeval next; |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 630 | |
| 631 | /* Retrieve next retransmission as struct timeval */ |
| 632 | gtp_retranstimeout(sgi->gsn, &next); |
| 633 | |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 634 | /* re-schedule the timer */ |
Pablo Neira Ayuso | 840ccf6 | 2011-05-06 12:11:06 +0200 | [diff] [blame] | 635 | 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] | 636 | } |
| 637 | |
| 638 | /* timer callback for libgtp retransmissions and ping */ |
| 639 | static void sgsn_gtp_tmr_cb(void *data) |
| 640 | { |
| 641 | struct sgsn_instance *sgi = data; |
| 642 | |
| 643 | /* Do all the retransmissions as needed */ |
| 644 | gtp_retrans(sgi->gsn); |
| 645 | |
| 646 | sgsn_gtp_tmr_start(sgi); |
| 647 | } |
| 648 | |
| 649 | int sgsn_gtp_init(struct sgsn_instance *sgi) |
| 650 | { |
| 651 | int rc; |
| 652 | struct gsn_t *gsn; |
| 653 | |
| 654 | rc = gtp_new(&sgi->gsn, sgi->cfg.gtp_statedir, |
| 655 | &sgi->cfg.gtp_listenaddr.sin_addr, GTP_MODE_SGSN); |
| 656 | if (rc) { |
| 657 | LOGP(DGPRS, LOGL_ERROR, "Failed to create GTP: %d\n", rc); |
| 658 | return rc; |
| 659 | } |
| 660 | gsn = sgi->gsn; |
| 661 | |
| 662 | sgi->gtp_fd0.fd = gsn->fd0; |
| 663 | sgi->gtp_fd0.priv_nr = 0; |
| 664 | sgi->gtp_fd0.data = sgi; |
Harald Welte | 15bd924 | 2010-05-18 13:13:11 +0200 | [diff] [blame] | 665 | sgi->gtp_fd0.when = BSC_FD_READ; |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 666 | sgi->gtp_fd0.cb = sgsn_gtp_fd_cb; |
Pablo Neira Ayuso | 04d24cd | 2011-05-06 12:11:23 +0200 | [diff] [blame] | 667 | rc = osmo_fd_register(&sgi->gtp_fd0); |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 668 | if (rc < 0) |
| 669 | return rc; |
| 670 | |
| 671 | sgi->gtp_fd1c.fd = gsn->fd1c; |
| 672 | sgi->gtp_fd1c.priv_nr = 1; |
| 673 | sgi->gtp_fd1c.data = sgi; |
Harald Welte | 15bd924 | 2010-05-18 13:13:11 +0200 | [diff] [blame] | 674 | sgi->gtp_fd1c.when = BSC_FD_READ; |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 675 | sgi->gtp_fd1c.cb = sgsn_gtp_fd_cb; |
Holger Hans Peter Freyther | 44051a2 | 2013-07-04 18:39:02 +0200 | [diff] [blame] | 676 | rc = osmo_fd_register(&sgi->gtp_fd1c); |
| 677 | if (rc < 0) { |
| 678 | osmo_fd_unregister(&sgi->gtp_fd0); |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 679 | return rc; |
Holger Hans Peter Freyther | 44051a2 | 2013-07-04 18:39:02 +0200 | [diff] [blame] | 680 | } |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 681 | |
| 682 | sgi->gtp_fd1u.fd = gsn->fd1u; |
| 683 | sgi->gtp_fd1u.priv_nr = 2; |
| 684 | sgi->gtp_fd1u.data = sgi; |
Harald Welte | 15bd924 | 2010-05-18 13:13:11 +0200 | [diff] [blame] | 685 | sgi->gtp_fd1u.when = BSC_FD_READ; |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 686 | sgi->gtp_fd1u.cb = sgsn_gtp_fd_cb; |
Holger Hans Peter Freyther | 44051a2 | 2013-07-04 18:39:02 +0200 | [diff] [blame] | 687 | rc = osmo_fd_register(&sgi->gtp_fd1u); |
| 688 | if (rc < 0) { |
| 689 | osmo_fd_unregister(&sgi->gtp_fd0); |
| 690 | osmo_fd_unregister(&sgi->gtp_fd1c); |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 691 | return rc; |
Holger Hans Peter Freyther | 44051a2 | 2013-07-04 18:39:02 +0200 | [diff] [blame] | 692 | } |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 693 | |
| 694 | /* Start GTP re-transmission timer */ |
| 695 | sgi->gtp_timer.cb = sgsn_gtp_tmr_cb; |
Harald Welte | b2788dc | 2010-05-18 18:28:13 +0200 | [diff] [blame] | 696 | sgi->gtp_timer.data = sgi; |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 697 | sgsn_gtp_tmr_start(sgi); |
| 698 | |
| 699 | /* Register callbackcs with libgtp */ |
| 700 | gtp_set_cb_delete_context(gsn, cb_delete_context); |
| 701 | gtp_set_cb_conf(gsn, cb_conf); |
Harald Welte | 94ecef3 | 2010-12-24 21:13:26 +0100 | [diff] [blame] | 702 | gtp_set_cb_recovery(gsn, cb_recovery); |
Harald Welte | 8f77f19 | 2010-05-17 00:44:57 +0200 | [diff] [blame] | 703 | gtp_set_cb_data_ind(gsn, cb_data_ind); |
| 704 | gtp_set_cb_unsup_ind(gsn, cb_unsup_ind); |
| 705 | gtp_set_cb_extheader_ind(gsn, cb_extheader_ind); |
| 706 | |
| 707 | return 0; |
| 708 | } |