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