| /* PDP context functionality */ |
| |
| /* (C) 2009 by Harald Welte <laforge@gnumonks.org> |
| * |
| * 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 <stdint.h> |
| |
| #include <osmocom/core/linuxlist.h> |
| #include <osmocom/core/talloc.h> |
| #include <osmocom/core/timer.h> |
| #include <osmocom/core/rate_ctr.h> |
| #include <osmocom/core/stats.h> |
| |
| #include <osmocom/sgsn/pdpctx.h> |
| #include <osmocom/sgsn/gprs_sgsn.h> |
| #include <osmocom/sgsn/sgsn.h> |
| #include <osmocom/sgsn/debug.h> |
| #include <osmocom/sgsn/signal.h> |
| #include <osmocom/sgsn/gtp_ggsn.h> |
| #include <osmocom/sgsn/gprs_llc_xid.h> |
| #include <osmocom/sgsn/gprs_sndcp.h> |
| #include <osmocom/sgsn/gprs_llc.h> |
| #include <osmocom/sgsn/gprs_sm.h> |
| #include <osmocom/sgsn/gtp.h> |
| |
| static const struct rate_ctr_desc pdpctx_ctr_description[] = { |
| { "udata:packets:in", "User Data Messages ( In)" }, |
| { "udata:packets:out", "User Data Messages (Out)" }, |
| { "udata:bytes:in", "User Data Bytes ( In)" }, |
| { "udata:bytes:out", "User Data Bytes (Out)" }, |
| }; |
| |
| static const struct rate_ctr_group_desc pdpctx_ctrg_desc = { |
| .group_name_prefix = "sgsn:pdpctx", |
| .group_description = "SGSN PDP Context Statistics", |
| .num_ctr = ARRAY_SIZE(pdpctx_ctr_description), |
| .ctr_desc = pdpctx_ctr_description, |
| .class_id = OSMO_STATS_CLASS_SUBSCRIBER, |
| }; |
| |
| /* you don't want to use this directly, call sgsn_create_pdp_ctx() */ |
| struct sgsn_pdp_ctx *sgsn_pdp_ctx_alloc(struct sgsn_mm_ctx *mm, |
| struct sgsn_ggsn_ctx *ggsn, |
| uint8_t nsapi) |
| { |
| struct sgsn_pdp_ctx *pdp; |
| |
| pdp = sgsn_pdp_ctx_by_nsapi(mm, nsapi); |
| if (pdp) |
| return NULL; |
| |
| pdp = talloc_zero(sgsn, struct sgsn_pdp_ctx); |
| if (!pdp) |
| return NULL; |
| |
| pdp->mm = mm; |
| pdp->ggsn = ggsn; |
| pdp->nsapi = nsapi; |
| pdp->ctrg = rate_ctr_group_alloc(pdp, &pdpctx_ctrg_desc, nsapi); |
| if (!pdp->ctrg) { |
| LOGPDPCTXP(LOGL_ERROR, pdp, "Error allocation counter group\n"); |
| talloc_free(pdp); |
| return NULL; |
| } |
| llist_add(&pdp->list, &mm->pdp_list); |
| sgsn_ggsn_ctx_add_pdp(pdp->ggsn, pdp); |
| llist_add(&pdp->g_list, &sgsn->pdp_list); |
| |
| return pdp; |
| } |
| |
| /* |
| * This function will not trigger any GSM DEACT PDP ACK messages, so you |
| * probably want to call sgsn_delete_pdp_ctx() instead if the connection |
| * isn't detached already. |
| */ |
| void sgsn_pdp_ctx_terminate(struct sgsn_pdp_ctx *pdp) |
| { |
| struct sgsn_signal_data sig_data; |
| |
| OSMO_ASSERT(pdp->mm != NULL); |
| |
| /* There might still be pending callbacks in libgtp. So the parts of |
| * this object relevant to GTP need to remain intact in this case. */ |
| |
| LOGPDPCTXP(LOGL_INFO, pdp, "Forcing release of PDP context\n"); |
| |
| if (pdp->mm->ran_type == MM_CTX_T_GERAN_Gb) { |
| /* Force the deactivation of the SNDCP layer */ |
| if (pdp->mm->gb.llme) |
| sndcp_sm_deactivate_ind(&pdp->mm->gb.llme->lle[pdp->sapi], pdp->nsapi); |
| } |
| |
| memset(&sig_data, 0, sizeof(sig_data)); |
| sig_data.pdp = pdp; |
| osmo_signal_dispatch(SS_SGSN, S_SGSN_PDP_TERMINATE, &sig_data); |
| |
| /* Detach from MM context */ |
| pdp_ctx_detach_mm_ctx(pdp); |
| if (pdp->ggsn) |
| sgsn_delete_pdp_ctx(pdp); |
| } |
| |
| /* |
| * Don't call this function directly unless you know what you are doing. |
| * In normal conditions use sgsn_delete_pdp_ctx and in unspecified or |
| * implementation dependent abnormal ones sgsn_pdp_ctx_terminate. |
| */ |
| void sgsn_pdp_ctx_free(struct sgsn_pdp_ctx *pdp) |
| { |
| struct sgsn_signal_data sig_data; |
| |
| memset(&sig_data, 0, sizeof(sig_data)); |
| sig_data.pdp = pdp; |
| osmo_signal_dispatch(SS_SGSN, S_SGSN_PDP_FREE, &sig_data); |
| |
| if (osmo_timer_pending(&pdp->timer)) { |
| LOGPDPCTXP(LOGL_ERROR, pdp, "Freeing PDP ctx with timer %u pending\n", pdp->T); |
| osmo_timer_del(&pdp->timer); |
| } |
| |
| rate_ctr_group_free(pdp->ctrg); |
| if (pdp->mm) |
| llist_del(&pdp->list); |
| if (pdp->ggsn) |
| sgsn_ggsn_ctx_remove_pdp(pdp->ggsn, pdp); |
| llist_del(&pdp->g_list); |
| |
| /* _if_ we still have a library handle, at least set it to NULL |
| * to avoid any dereferences of the now-deleted PDP context from |
| * sgsn_libgtp:cb_data_ind() */ |
| if (pdp->lib) { |
| struct pdp_t *lib = pdp->lib; |
| LOGPDPCTXP(LOGL_NOTICE, pdp, "freeing PDP context that still " |
| "has a libgtp handle attached to it, this shouldn't " |
| "happen!\n"); |
| osmo_generate_backtrace(); |
| lib->priv = NULL; |
| } |
| |
| talloc_free(pdp); |
| } |