diff options
Diffstat (limited to 'openbsc/src/gprs/gprs_sgsn.c')
| -rw-r--r-- | openbsc/src/gprs/gprs_sgsn.c | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/openbsc/src/gprs/gprs_sgsn.c b/openbsc/src/gprs/gprs_sgsn.c index 6f706642d..1427b1afb 100644 --- a/openbsc/src/gprs/gprs_sgsn.c +++ b/openbsc/src/gprs/gprs_sgsn.c @@ -37,6 +37,10 @@ #include <openbsc/gprs_gmm.h> #include "openbsc/gprs_llc.h" +#include <time.h> + +#define GPRS_LLME_CHECK_TICK 30 + extern struct sgsn_instance *sgsn; LLIST_HEAD(sgsn_mm_ctxts); @@ -508,3 +512,63 @@ void sgsn_update_subscriber_data(struct sgsn_mm_ctx *mmctx, sgsn_auth_update(mmctx); } + +static void sgsn_llme_cleanup_free(struct gprs_llc_llme *llme) +{ + struct sgsn_mm_ctx *mmctx = NULL; + + llist_for_each_entry(mmctx, &sgsn_mm_ctxts, list) { + if (llme == mmctx->llme) { + gsm0408_gprs_access_cancelled(mmctx, SGSN_ERROR_CAUSE_NONE); + return; + } + } + + /* No MM context found */ + LOGP(DGPRS, LOGL_INFO, "Deleting orphaned LLME, TLLI 0x%08x\n", + llme->tlli); + gprs_llgmm_assign(llme, llme->tlli, 0xffffffff, GPRS_ALGO_GEA0, NULL); +} + +static void sgsn_llme_check_cb(void *data_) +{ + struct gprs_llc_llme *llme, *llme_tmp; + struct timespec now_tp; + time_t now, age; + + int rc; + + rc = clock_gettime(CLOCK_MONOTONIC, &now_tp); + OSMO_ASSERT(rc >= 0); + now = now_tp.tv_sec; + + LOGP(DGPRS, LOGL_DEBUG, + "Checking for inactive LLMEs, time = %u\n", (unsigned)now); + + llist_for_each_entry_safe(llme, llme_tmp, &gprs_llc_llmes, list) { + if (llme->age_timestamp == GPRS_LLME_RESET_AGE) + llme->age_timestamp = now; + + age = now - llme->age_timestamp; + + /* TODO: derive time from setting / mmctx. + * Currently hard-coded to 10min + 4min + 44s */ + if (age > 16 * 60 || age < 0) { + LOGP(DGPRS, LOGL_INFO, + "Inactivity timeout for TLLI 0x%08x, age %d\n", + llme->tlli, (int)age); + sgsn_llme_cleanup_free(llme); + } + } + + osmo_timer_schedule(&sgsn->llme_timer, GPRS_LLME_CHECK_TICK, 0); +} + +void sgsn_inst_init() +{ + sgsn->llme_timer.cb = sgsn_llme_check_cb; + sgsn->llme_timer.data = NULL; + + osmo_timer_schedule(&sgsn->llme_timer, GPRS_LLME_CHECK_TICK, 0); +} + |