diff options
Diffstat (limited to 'openbsc/src/gprs')
| -rw-r--r-- | openbsc/src/gprs/Makefile.am | 2 | ||||
| -rw-r--r-- | openbsc/src/gprs/sgsn_cdr.c | 254 | ||||
| -rw-r--r-- | openbsc/src/gprs/sgsn_libgtp.c | 6 | ||||
| -rw-r--r-- | openbsc/src/gprs/sgsn_main.c | 1 |
4 files changed, 262 insertions, 1 deletions
diff --git a/openbsc/src/gprs/Makefile.am b/openbsc/src/gprs/Makefile.am index bc3e21e1b..3d0282204 100644 --- a/openbsc/src/gprs/Makefile.am +++ b/openbsc/src/gprs/Makefile.am @@ -24,7 +24,7 @@ osmo_sgsn_SOURCES = gprs_gmm.c gprs_sgsn.c gprs_sndcp.c gprs_sndcp_vty.c \ gprs_llc.c gprs_llc_parse.c gprs_llc_vty.c crc24.c \ sgsn_ctrl.c sgsn_auth.c gprs_subscriber.c \ gprs_gsup_messages.c gprs_utils.c gprs_gsup_client.c \ - gsm_04_08_gprs.c + gsm_04_08_gprs.c sgsn_cdr.c osmo_sgsn_LDADD = \ $(top_builddir)/src/libcommon/libcommon.a \ -lgtp $(OSMO_LIBS) $(LIBOSMOABIS_LIBS) -lrt diff --git a/openbsc/src/gprs/sgsn_cdr.c b/openbsc/src/gprs/sgsn_cdr.c new file mode 100644 index 000000000..0fcdd3b2a --- /dev/null +++ b/openbsc/src/gprs/sgsn_cdr.c @@ -0,0 +1,254 @@ +/* GPRS SGSN CDR dumper */ + +/* (C) 2015 by Holger Hans Peter Freyther + * All Rights Reserved + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU Affero General Public License as published by + * the Free Software Foundation; either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + * + */ + +#include <openbsc/sgsn.h> +#include <openbsc/signal.h> +#include <openbsc/gprs_utils.h> +#include <openbsc/debug.h> + +#include <openbsc/vty.h> + +#include <gtp.h> +#include <pdp.h> + +#include <arpa/inet.h> + +#include <time.h> + +#include <stdio.h> +#include <inttypes.h> + +/* TODO...avoid going through a global */ +extern struct sgsn_instance *sgsn; + +/** + * The CDR module will generate an entry like: + * + * IMSI, # Subscriber IMSI + * IMEI, # Subscriber IMEI + * MSISDN, # Subscriber MISDN + * Charging_Timestamp, # Event start Time + * Charging_UTC, # Time zone of event start time + * Duration, # Session DURATION + * Cell_Id, # CELL_ID + * Location_Area, # LAC + * GGSN_ADDR, # GGSN_ADDR + * SGSN_ADDR, # SGSN_ADDR + * APNI, # APNI + * PDP_ADDR, # PDP_ADDR + * VOL_IN, # VOL_IN in Bytes + * VOL_OUT, # VOL_OUT in Bytes + * CAUSE_FOR_TERM, # CAUSE_FOR_TERM + */ + + +static void maybe_print_header(FILE *cdr_file) +{ + if (ftell(cdr_file) != 0) + return; + + fprintf(cdr_file, "timestamp,imsi,imei,msisdn,cell_id,lac,event,pdp_duration,ggsn_addr,sgsn_addr,apni,eua_addr,vol_in,vol_out\n"); +} + +static void cdr_log_mm(struct sgsn_instance *inst, const char *ev, + struct sgsn_mm_ctx *mmctx) +{ + FILE *cdr_file; + struct tm tm; + struct timeval tv; + + if (!inst->cfg.cdr.filename) + return; + + cdr_file = fopen(inst->cfg.cdr.filename, "a"); + if (!cdr_file) { + LOGP(DGPRS, LOGL_ERROR, "Failed to open %s\n", + inst->cfg.cdr.filename); + return; + } + + maybe_print_header(cdr_file); + gettimeofday(&tv, NULL); + gmtime_r(&tv.tv_sec, &tm); + fprintf(cdr_file, "%04d%02d%02d%02d%02d%02d%03d,%s,%s,%s,%d,%d,%s\n", + tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, + tm.tm_hour, tm.tm_min, tm.tm_sec, + (int)(tv.tv_usec / 1000), + mmctx->imsi, + mmctx->imei, + mmctx->msisdn, + mmctx->cell_id, + mmctx->ra.lac, + ev); + + fclose(cdr_file); +} + +static void extract_eua(struct ul66_t *eua, char *eua_addr) +{ + if (eua->l < 2) + return; + + /* there is no addr for ETSI/PPP */ + if ((eua->v[0] & 0x0F) != 1) { + strcpy(eua_addr, "ETSI"); + return; + } + + if (eua->v[1] == 0x21 && eua->l == 6) + inet_ntop(AF_INET, &eua->v[2], eua_addr, INET_ADDRSTRLEN); + else if (eua->v[1] == 0x57 && eua->l == 18) + inet_ntop(AF_INET6, &eua->v[2], eua_addr, INET6_ADDRSTRLEN); + else { + /* e.g. both IPv4 and IPv6 */ + strcpy(eua_addr, "Unknown address"); + } +} + +static void cdr_log_pdp(struct sgsn_instance *inst, const char *ev, + struct sgsn_pdp_ctx *pdp) +{ + FILE *cdr_file; + char apni[(pdp->lib ? pdp->lib->apn_use.l : 0) + 1]; + char ggsn_addr[INET_ADDRSTRLEN + 1]; + char sgsn_addr[INET_ADDRSTRLEN + 1]; + char eua_addr[INET6_ADDRSTRLEN + 1]; + struct tm tm; + struct timeval tv; + time_t duration; + struct timespec tp; + + if (!inst->cfg.cdr.filename) + return; + + memset(apni, 0, sizeof(apni)); + memset(ggsn_addr, 0, sizeof(ggsn_addr)); + memset(eua_addr, 0, sizeof(eua_addr)); + + + if (pdp->lib) { + gprs_apn_to_str(apni, pdp->lib->apn_use.v, pdp->lib->apn_use.l); + inet_ntop(AF_INET, &pdp->lib->hisaddr0.s_addr, ggsn_addr, sizeof(ggsn_addr)); + extract_eua(&pdp->lib->eua, eua_addr); + } + + if (pdp->ggsn) + inet_ntop(AF_INET, &pdp->ggsn->gsn->gsnc.s_addr, sgsn_addr, sizeof(sgsn_addr)); + + cdr_file = fopen(inst->cfg.cdr.filename, "a"); + if (!cdr_file) { + LOGP(DGPRS, LOGL_ERROR, "Failed to open %s\n", + inst->cfg.cdr.filename); + return; + } + + maybe_print_header(cdr_file); + + clock_gettime(CLOCK_MONOTONIC, &tp); + gettimeofday(&tv, NULL); + + /* convert the timestamp to UTC */ + gmtime_r(&tv.tv_sec, &tm); + + /* Check the duration of the PDP context */ + duration = tp.tv_sec - pdp->cdr_start.tv_sec; + + fprintf(cdr_file, + "%04d%02d%02d%02d%02d%02d%03d,%s,%s,%s,%d,%d,%s,%ld,%s,%s,%s,%s,%" PRIu64 ",%" PRIu64 "\n", + tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, + tm.tm_hour, tm.tm_min, tm.tm_sec, + (int)(tv.tv_usec / 1000), + pdp->mm ? pdp->mm->imsi : "N/A", + pdp->mm ? pdp->mm->imei : "N/A", + pdp->mm ? pdp->mm->msisdn : "N/A", + pdp->mm ? pdp->mm->cell_id : -1, + pdp->mm ? pdp->mm->ra.lac : -1, + ev, + (unsigned long ) duration, + ggsn_addr, + sgsn_addr, + apni, + eua_addr, + pdp->cdr_bytes_in, + pdp->cdr_bytes_out); + fclose(cdr_file); +} + +static void cdr_pdp_timeout(void *_data) +{ + struct sgsn_pdp_ctx *pdp = _data; + cdr_log_pdp(sgsn, "pdp-periodic", pdp); + osmo_timer_schedule(&pdp->cdr_timer, sgsn->cfg.cdr.interval, 0); +} + +static int handle_sgsn_sig(unsigned int subsys, unsigned int signal, + void *handler_data, void *_signal_data) +{ + struct sgsn_signal_data *signal_data = _signal_data; + struct sgsn_instance *inst = handler_data; + + if (subsys != SS_SGSN) + return 0; + + switch (signal) { + case S_SGSN_ATTACH: + cdr_log_mm(inst, "attach", signal_data->mm); + break; + case S_SGSN_UPDATE: + cdr_log_mm(inst, "update", signal_data->mm); + break; + case S_SGSN_DETACH: + cdr_log_mm(inst, "detach", signal_data->mm); + break; + case S_SGSN_MM_FREE: + cdr_log_mm(inst, "free", signal_data->mm); + break; + case S_SGSN_PDP_ACT: + clock_gettime(CLOCK_MONOTONIC, &signal_data->pdp->cdr_start); + cdr_log_pdp(inst, "pdp-act", signal_data->pdp); + signal_data->pdp->cdr_timer.cb = cdr_pdp_timeout; + signal_data->pdp->cdr_timer.data = signal_data->pdp; + osmo_timer_schedule(&signal_data->pdp->cdr_timer, inst->cfg.cdr.interval, 0); + break; + case S_SGSN_PDP_DEACT: + cdr_log_pdp(inst, "pdp-deact", signal_data->pdp); + osmo_timer_del(&signal_data->pdp->cdr_timer); + break; + case S_SGSN_PDP_TERMINATE: + cdr_log_pdp(inst, "pdp-terminate", signal_data->pdp); + osmo_timer_del(&signal_data->pdp->cdr_timer); + break; + case S_SGSN_PDP_FREE: + cdr_log_pdp(inst, "pdp-free", signal_data->pdp); + osmo_timer_del(&signal_data->pdp->cdr_timer); + break; + } + + return 0; +} + +int sgsn_cdr_init(struct sgsn_instance *sgsn) +{ + /* register for CDR related events */ + sgsn->cfg.cdr.interval = 10 * 60; + osmo_signal_register_handler(SS_SGSN, handle_sgsn_sig, sgsn); + + return 0; +} diff --git a/openbsc/src/gprs/sgsn_libgtp.c b/openbsc/src/gprs/sgsn_libgtp.c index af5c93de3..9972cddf3 100644 --- a/openbsc/src/gprs/sgsn_libgtp.c +++ b/openbsc/src/gprs/sgsn_libgtp.c @@ -534,6 +534,9 @@ static int cb_data_ind(struct pdp_t *lib, void *packet, unsigned int len) rate_ctr_inc(&mm->ctrg->ctr[GMM_CTR_PKTS_UDATA_OUT]); rate_ctr_add(&mm->ctrg->ctr[GMM_CTR_BYTES_UDATA_OUT], len); + /* It is easier to have a global count */ + pdp->cdr_bytes_out += len; + return sndcp_unitdata_req(msg, &mm->llme->lle[pdp->sapi], pdp->nsapi, mm); } @@ -569,6 +572,9 @@ int sgsn_rx_sndcp_ud_ind(struct gprs_ra_id *ra_id, int32_t tlli, uint8_t nsapi, rate_ctr_inc(&mmctx->ctrg->ctr[GMM_CTR_PKTS_UDATA_IN]); rate_ctr_add(&mmctx->ctrg->ctr[GMM_CTR_BYTES_UDATA_IN], npdu_len); + /* It is easier to have a global count */ + pdp->cdr_bytes_in += npdu_len; + return gtp_data_req(pdp->ggsn->gsn, pdp->lib, npdu, npdu_len); } diff --git a/openbsc/src/gprs/sgsn_main.c b/openbsc/src/gprs/sgsn_main.c index 0db90d5c3..d5f7f6588 100644 --- a/openbsc/src/gprs/sgsn_main.c +++ b/openbsc/src/gprs/sgsn_main.c @@ -344,6 +344,7 @@ int main(int argc, char **argv) gprs_llc_vty_init(); gprs_sndcp_vty_init(); sgsn_auth_init(); + sgsn_cdr_init(&sgsn_inst); /* FIXME: register signal handler for SS_L_NS */ rc = sgsn_parse_config(sgsn_inst.config_file, &sgsn_inst.cfg); |