Holger Hans Peter Freyther | 4f5b823 | 2015-05-05 22:25:48 +0200 | [diff] [blame] | 1 | /* GPRS SGSN CDR dumper */ |
| 2 | |
| 3 | /* (C) 2015 by Holger Hans Peter Freyther |
| 4 | * All Rights Reserved |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU Affero General Public License as published by |
| 8 | * the Free Software Foundation; either version 3 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU Affero General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU Affero General Public License |
| 17 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 18 | * |
| 19 | */ |
| 20 | |
Pau Espin Pedrol | 2e9ea50 | 2017-11-29 14:01:35 +0100 | [diff] [blame] | 21 | #include <osmocom/ctrl/control_if.h> |
| 22 | |
Neels Hofmeyr | 396f2e6 | 2017-09-04 15:13:25 +0200 | [diff] [blame] | 23 | #include <osmocom/sgsn/sgsn.h> |
| 24 | #include <osmocom/sgsn/signal.h> |
| 25 | #include <osmocom/sgsn/gprs_utils.h> |
| 26 | #include <osmocom/sgsn/debug.h> |
Harald Welte | 7e82b74 | 2017-08-12 13:43:54 +0200 | [diff] [blame] | 27 | #include <osmocom/gsm/apn.h> |
Holger Hans Peter Freyther | 4f5b823 | 2015-05-05 22:25:48 +0200 | [diff] [blame] | 28 | |
Neels Hofmeyr | 396f2e6 | 2017-09-04 15:13:25 +0200 | [diff] [blame] | 29 | #include <osmocom/sgsn/vty.h> |
Pau Espin Pedrol | 5f4736a | 2023-01-04 21:30:28 +0100 | [diff] [blame^] | 30 | #include <osmocom/sgsn/gtp_ggsn.h> |
Holger Hans Peter Freyther | 4f5b823 | 2015-05-05 22:25:48 +0200 | [diff] [blame] | 31 | |
| 32 | #include <gtp.h> |
| 33 | #include <pdp.h> |
| 34 | |
| 35 | #include <arpa/inet.h> |
| 36 | |
| 37 | #include <time.h> |
| 38 | |
| 39 | #include <stdio.h> |
| 40 | #include <inttypes.h> |
| 41 | |
| 42 | /* TODO...avoid going through a global */ |
| 43 | extern struct sgsn_instance *sgsn; |
Pau Espin Pedrol | 2e9ea50 | 2017-11-29 14:01:35 +0100 | [diff] [blame] | 44 | extern struct ctrl_handle *g_ctrlh; |
Holger Hans Peter Freyther | 4f5b823 | 2015-05-05 22:25:48 +0200 | [diff] [blame] | 45 | |
| 46 | /** |
| 47 | * The CDR module will generate an entry like: |
| 48 | * |
| 49 | * IMSI, # Subscriber IMSI |
| 50 | * IMEI, # Subscriber IMEI |
| 51 | * MSISDN, # Subscriber MISDN |
| 52 | * Charging_Timestamp, # Event start Time |
| 53 | * Charging_UTC, # Time zone of event start time |
| 54 | * Duration, # Session DURATION |
| 55 | * Cell_Id, # CELL_ID |
| 56 | * Location_Area, # LAC |
| 57 | * GGSN_ADDR, # GGSN_ADDR |
| 58 | * SGSN_ADDR, # SGSN_ADDR |
| 59 | * APNI, # APNI |
| 60 | * PDP_ADDR, # PDP_ADDR |
| 61 | * VOL_IN, # VOL_IN in Bytes |
| 62 | * VOL_OUT, # VOL_OUT in Bytes |
| 63 | * CAUSE_FOR_TERM, # CAUSE_FOR_TERM |
| 64 | */ |
| 65 | |
Pau Espin Pedrol | 2e9ea50 | 2017-11-29 14:01:35 +0100 | [diff] [blame] | 66 | static void send_cdr_trap(char *value) |
| 67 | { |
| 68 | if (ctrl_cmd_send_trap(g_ctrlh, "cdr-v1", value) < 0) |
| 69 | LOGP(DGPRS, LOGL_ERROR, "Failed to create and send TRAP cdr-v1\n"); |
| 70 | } |
Holger Hans Peter Freyther | 4f5b823 | 2015-05-05 22:25:48 +0200 | [diff] [blame] | 71 | |
| 72 | static void maybe_print_header(FILE *cdr_file) |
| 73 | { |
| 74 | if (ftell(cdr_file) != 0) |
| 75 | return; |
| 76 | |
Holger Hans Peter Freyther | 8ee13e2 | 2015-05-18 10:00:03 +0200 | [diff] [blame] | 77 | fprintf(cdr_file, "timestamp,imsi,imei,msisdn,cell_id,lac,hlr,event,pdp_duration,ggsn_addr,sgsn_addr,apni,eua_addr,vol_in,vol_out,charging_id\n"); |
Holger Hans Peter Freyther | 4f5b823 | 2015-05-05 22:25:48 +0200 | [diff] [blame] | 78 | } |
| 79 | |
Pau Espin Pedrol | 291efcb | 2017-11-29 12:42:07 +0100 | [diff] [blame] | 80 | static int cdr_snprintf_mm(char *buf, size_t size, const char *ev, |
| 81 | struct sgsn_mm_ctx *mmctx) |
| 82 | { |
| 83 | struct tm tm; |
| 84 | struct timeval tv; |
| 85 | int ret; |
| 86 | |
| 87 | gettimeofday(&tv, NULL); |
| 88 | gmtime_r(&tv.tv_sec, &tm); |
| 89 | ret = snprintf(buf, size, "%04d%02d%02d%02d%02d%02d%03d,%s,%s,%s,%d,%d,%s,%s", |
| 90 | tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, |
| 91 | tm.tm_hour, tm.tm_min, tm.tm_sec, |
| 92 | (int)(tv.tv_usec / 1000), |
| 93 | mmctx->imsi, |
| 94 | mmctx->imei, |
| 95 | mmctx->msisdn, |
| 96 | mmctx->gb.cell_id, |
| 97 | mmctx->ra.lac, |
| 98 | mmctx->hlr, |
| 99 | ev); |
| 100 | return ret; |
| 101 | } |
| 102 | |
Holger Hans Peter Freyther | 4f5b823 | 2015-05-05 22:25:48 +0200 | [diff] [blame] | 103 | static void cdr_log_mm(struct sgsn_instance *inst, const char *ev, |
| 104 | struct sgsn_mm_ctx *mmctx) |
| 105 | { |
| 106 | FILE *cdr_file; |
Pau Espin Pedrol | 291efcb | 2017-11-29 12:42:07 +0100 | [diff] [blame] | 107 | char buf[1024]; |
Holger Hans Peter Freyther | 4f5b823 | 2015-05-05 22:25:48 +0200 | [diff] [blame] | 108 | |
Pau Espin Pedrol | 2e9ea50 | 2017-11-29 14:01:35 +0100 | [diff] [blame] | 109 | if (!inst->cfg.cdr.filename && !inst->cfg.cdr.trap) |
Holger Hans Peter Freyther | 4f5b823 | 2015-05-05 22:25:48 +0200 | [diff] [blame] | 110 | return; |
| 111 | |
Pau Espin Pedrol | 291efcb | 2017-11-29 12:42:07 +0100 | [diff] [blame] | 112 | cdr_snprintf_mm(buf, sizeof(buf), ev, mmctx); |
Holger Hans Peter Freyther | 4f5b823 | 2015-05-05 22:25:48 +0200 | [diff] [blame] | 113 | |
Pau Espin Pedrol | 2e9ea50 | 2017-11-29 14:01:35 +0100 | [diff] [blame] | 114 | if (inst->cfg.cdr.trap) |
| 115 | send_cdr_trap(buf); |
| 116 | |
| 117 | if (inst->cfg.cdr.filename) { |
| 118 | cdr_file = fopen(inst->cfg.cdr.filename, "a"); |
| 119 | if (!cdr_file) { |
| 120 | LOGP(DGPRS, LOGL_ERROR, "Failed to open %s\n", |
| 121 | inst->cfg.cdr.filename); |
| 122 | return; |
| 123 | } |
| 124 | |
| 125 | maybe_print_header(cdr_file); |
| 126 | fprintf(cdr_file, "%s\n", buf); |
| 127 | |
| 128 | fclose(cdr_file); |
| 129 | } |
Holger Hans Peter Freyther | 4f5b823 | 2015-05-05 22:25:48 +0200 | [diff] [blame] | 130 | } |
| 131 | |
| 132 | static void extract_eua(struct ul66_t *eua, char *eua_addr) |
| 133 | { |
| 134 | if (eua->l < 2) |
| 135 | return; |
| 136 | |
| 137 | /* there is no addr for ETSI/PPP */ |
| 138 | if ((eua->v[0] & 0x0F) != 1) { |
| 139 | strcpy(eua_addr, "ETSI"); |
| 140 | return; |
| 141 | } |
| 142 | |
| 143 | if (eua->v[1] == 0x21 && eua->l == 6) |
| 144 | inet_ntop(AF_INET, &eua->v[2], eua_addr, INET_ADDRSTRLEN); |
| 145 | else if (eua->v[1] == 0x57 && eua->l == 18) |
| 146 | inet_ntop(AF_INET6, &eua->v[2], eua_addr, INET6_ADDRSTRLEN); |
| 147 | else { |
| 148 | /* e.g. both IPv4 and IPv6 */ |
| 149 | strcpy(eua_addr, "Unknown address"); |
| 150 | } |
| 151 | } |
| 152 | |
Pau Espin Pedrol | 291efcb | 2017-11-29 12:42:07 +0100 | [diff] [blame] | 153 | static int cdr_snprintf_pdp(char *buf, size_t size, const char *ev, |
Holger Hans Peter Freyther | 4f5b823 | 2015-05-05 22:25:48 +0200 | [diff] [blame] | 154 | struct sgsn_pdp_ctx *pdp) |
| 155 | { |
Holger Hans Peter Freyther | 4f5b823 | 2015-05-05 22:25:48 +0200 | [diff] [blame] | 156 | char apni[(pdp->lib ? pdp->lib->apn_use.l : 0) + 1]; |
Pau Espin Pedrol | 8b88f5f | 2019-08-30 18:46:39 +0200 | [diff] [blame] | 157 | char ggsn_addr[INET_ADDRSTRLEN]; |
| 158 | char sgsn_addr[INET_ADDRSTRLEN]; |
| 159 | char eua_addr[INET6_ADDRSTRLEN]; |
Holger Hans Peter Freyther | 4f5b823 | 2015-05-05 22:25:48 +0200 | [diff] [blame] | 160 | struct tm tm; |
| 161 | struct timeval tv; |
| 162 | time_t duration; |
| 163 | struct timespec tp; |
Pau Espin Pedrol | 291efcb | 2017-11-29 12:42:07 +0100 | [diff] [blame] | 164 | int ret; |
Holger Hans Peter Freyther | 4f5b823 | 2015-05-05 22:25:48 +0200 | [diff] [blame] | 165 | |
| 166 | memset(apni, 0, sizeof(apni)); |
| 167 | memset(ggsn_addr, 0, sizeof(ggsn_addr)); |
Pau Espin Pedrol | c6cef69 | 2018-07-17 17:39:16 +0200 | [diff] [blame] | 168 | memset(sgsn_addr, 0, sizeof(sgsn_addr)); |
Holger Hans Peter Freyther | 4f5b823 | 2015-05-05 22:25:48 +0200 | [diff] [blame] | 169 | memset(eua_addr, 0, sizeof(eua_addr)); |
| 170 | |
| 171 | |
| 172 | if (pdp->lib) { |
Harald Welte | 7e82b74 | 2017-08-12 13:43:54 +0200 | [diff] [blame] | 173 | osmo_apn_to_str(apni, pdp->lib->apn_use.v, pdp->lib->apn_use.l); |
Holger Hans Peter Freyther | 4f5b823 | 2015-05-05 22:25:48 +0200 | [diff] [blame] | 174 | inet_ntop(AF_INET, &pdp->lib->hisaddr0.s_addr, ggsn_addr, sizeof(ggsn_addr)); |
| 175 | extract_eua(&pdp->lib->eua, eua_addr); |
| 176 | } |
| 177 | |
| 178 | if (pdp->ggsn) |
| 179 | inet_ntop(AF_INET, &pdp->ggsn->gsn->gsnc.s_addr, sgsn_addr, sizeof(sgsn_addr)); |
| 180 | |
Pau Espin Pedrol | 36abead | 2018-08-17 13:27:20 +0200 | [diff] [blame] | 181 | osmo_clock_gettime(CLOCK_MONOTONIC, &tp); |
Holger Hans Peter Freyther | 4f5b823 | 2015-05-05 22:25:48 +0200 | [diff] [blame] | 182 | gettimeofday(&tv, NULL); |
| 183 | |
| 184 | /* convert the timestamp to UTC */ |
| 185 | gmtime_r(&tv.tv_sec, &tm); |
| 186 | |
| 187 | /* Check the duration of the PDP context */ |
| 188 | duration = tp.tv_sec - pdp->cdr_start.tv_sec; |
| 189 | |
Pau Espin Pedrol | 291efcb | 2017-11-29 12:42:07 +0100 | [diff] [blame] | 190 | ret = snprintf(buf, size, |
| 191 | "%04d%02d%02d%02d%02d%02d%03d,%s,%s,%s,%d,%d,%s,%s,%ld,%s,%s,%s,%s,%" PRIu64 ",%" PRIu64 ",%u", |
Holger Hans Peter Freyther | 4f5b823 | 2015-05-05 22:25:48 +0200 | [diff] [blame] | 192 | tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, |
| 193 | tm.tm_hour, tm.tm_min, tm.tm_sec, |
| 194 | (int)(tv.tv_usec / 1000), |
| 195 | pdp->mm ? pdp->mm->imsi : "N/A", |
| 196 | pdp->mm ? pdp->mm->imei : "N/A", |
| 197 | pdp->mm ? pdp->mm->msisdn : "N/A", |
Harald Welte | f97ee04 | 2015-12-25 19:12:21 +0100 | [diff] [blame] | 198 | pdp->mm ? pdp->mm->gb.cell_id : -1, |
Holger Hans Peter Freyther | 4f5b823 | 2015-05-05 22:25:48 +0200 | [diff] [blame] | 199 | pdp->mm ? pdp->mm->ra.lac : -1, |
Holger Hans Peter Freyther | 8ee13e2 | 2015-05-18 10:00:03 +0200 | [diff] [blame] | 200 | pdp->mm ? pdp->mm->hlr : "N/A", |
Holger Hans Peter Freyther | 4f5b823 | 2015-05-05 22:25:48 +0200 | [diff] [blame] | 201 | ev, |
| 202 | (unsigned long ) duration, |
| 203 | ggsn_addr, |
| 204 | sgsn_addr, |
| 205 | apni, |
| 206 | eua_addr, |
| 207 | pdp->cdr_bytes_in, |
Holger Hans Peter Freyther | 77ff1c4 | 2015-05-12 21:08:42 +0200 | [diff] [blame] | 208 | pdp->cdr_bytes_out, |
| 209 | pdp->cdr_charging_id); |
Pau Espin Pedrol | 291efcb | 2017-11-29 12:42:07 +0100 | [diff] [blame] | 210 | return ret; |
| 211 | } |
| 212 | |
| 213 | static void cdr_log_pdp(struct sgsn_instance *inst, const char *ev, |
| 214 | struct sgsn_pdp_ctx *pdp) |
| 215 | { |
| 216 | FILE *cdr_file; |
| 217 | char buf[1024]; |
| 218 | |
Pau Espin Pedrol | 2e9ea50 | 2017-11-29 14:01:35 +0100 | [diff] [blame] | 219 | if (!inst->cfg.cdr.filename && !inst->cfg.cdr.trap) |
Pau Espin Pedrol | 291efcb | 2017-11-29 12:42:07 +0100 | [diff] [blame] | 220 | return; |
| 221 | |
Pau Espin Pedrol | 291efcb | 2017-11-29 12:42:07 +0100 | [diff] [blame] | 222 | cdr_snprintf_pdp(buf, sizeof(buf), ev, pdp); |
Pau Espin Pedrol | 2e9ea50 | 2017-11-29 14:01:35 +0100 | [diff] [blame] | 223 | |
| 224 | if (inst->cfg.cdr.trap) |
| 225 | send_cdr_trap(buf); |
| 226 | |
| 227 | if (inst->cfg.cdr.filename) { |
| 228 | cdr_file = fopen(inst->cfg.cdr.filename, "a"); |
| 229 | if (!cdr_file) { |
| 230 | LOGP(DGPRS, LOGL_ERROR, "Failed to open %s\n", |
| 231 | inst->cfg.cdr.filename); |
| 232 | return; |
| 233 | } |
| 234 | |
| 235 | maybe_print_header(cdr_file); |
| 236 | fprintf(cdr_file, "%s\n", buf); |
| 237 | fclose(cdr_file); |
| 238 | } |
Holger Hans Peter Freyther | 4f5b823 | 2015-05-05 22:25:48 +0200 | [diff] [blame] | 239 | } |
| 240 | |
| 241 | static void cdr_pdp_timeout(void *_data) |
| 242 | { |
| 243 | struct sgsn_pdp_ctx *pdp = _data; |
| 244 | cdr_log_pdp(sgsn, "pdp-periodic", pdp); |
| 245 | osmo_timer_schedule(&pdp->cdr_timer, sgsn->cfg.cdr.interval, 0); |
| 246 | } |
| 247 | |
| 248 | static int handle_sgsn_sig(unsigned int subsys, unsigned int signal, |
| 249 | void *handler_data, void *_signal_data) |
| 250 | { |
| 251 | struct sgsn_signal_data *signal_data = _signal_data; |
| 252 | struct sgsn_instance *inst = handler_data; |
| 253 | |
| 254 | if (subsys != SS_SGSN) |
| 255 | return 0; |
| 256 | |
| 257 | switch (signal) { |
| 258 | case S_SGSN_ATTACH: |
| 259 | cdr_log_mm(inst, "attach", signal_data->mm); |
| 260 | break; |
| 261 | case S_SGSN_UPDATE: |
| 262 | cdr_log_mm(inst, "update", signal_data->mm); |
| 263 | break; |
| 264 | case S_SGSN_DETACH: |
| 265 | cdr_log_mm(inst, "detach", signal_data->mm); |
| 266 | break; |
| 267 | case S_SGSN_MM_FREE: |
| 268 | cdr_log_mm(inst, "free", signal_data->mm); |
| 269 | break; |
| 270 | case S_SGSN_PDP_ACT: |
Pau Espin Pedrol | 36abead | 2018-08-17 13:27:20 +0200 | [diff] [blame] | 271 | osmo_clock_gettime(CLOCK_MONOTONIC, &signal_data->pdp->cdr_start); |
Holger Hans Peter Freyther | 77ff1c4 | 2015-05-12 21:08:42 +0200 | [diff] [blame] | 272 | signal_data->pdp->cdr_charging_id = signal_data->pdp->lib->cid; |
Holger Hans Peter Freyther | 4f5b823 | 2015-05-05 22:25:48 +0200 | [diff] [blame] | 273 | cdr_log_pdp(inst, "pdp-act", signal_data->pdp); |
Pablo Neira Ayuso | 5121576 | 2017-05-08 20:57:52 +0200 | [diff] [blame] | 274 | osmo_timer_setup(&signal_data->pdp->cdr_timer, cdr_pdp_timeout, |
| 275 | signal_data->pdp); |
Holger Hans Peter Freyther | 4f5b823 | 2015-05-05 22:25:48 +0200 | [diff] [blame] | 276 | osmo_timer_schedule(&signal_data->pdp->cdr_timer, inst->cfg.cdr.interval, 0); |
| 277 | break; |
| 278 | case S_SGSN_PDP_DEACT: |
| 279 | cdr_log_pdp(inst, "pdp-deact", signal_data->pdp); |
| 280 | osmo_timer_del(&signal_data->pdp->cdr_timer); |
| 281 | break; |
| 282 | case S_SGSN_PDP_TERMINATE: |
| 283 | cdr_log_pdp(inst, "pdp-terminate", signal_data->pdp); |
| 284 | osmo_timer_del(&signal_data->pdp->cdr_timer); |
| 285 | break; |
| 286 | case S_SGSN_PDP_FREE: |
| 287 | cdr_log_pdp(inst, "pdp-free", signal_data->pdp); |
| 288 | osmo_timer_del(&signal_data->pdp->cdr_timer); |
| 289 | break; |
| 290 | } |
| 291 | |
| 292 | return 0; |
| 293 | } |
| 294 | |
| 295 | int sgsn_cdr_init(struct sgsn_instance *sgsn) |
| 296 | { |
| 297 | /* register for CDR related events */ |
| 298 | sgsn->cfg.cdr.interval = 10 * 60; |
| 299 | osmo_signal_register_handler(SS_SGSN, handle_sgsn_sig, sgsn); |
| 300 | |
| 301 | return 0; |
| 302 | } |