From f146b640d528d1eb67e1eedaa121d7bb1a665bab Mon Sep 17 00:00:00 2001 From: Robert Schmidt Date: Fri, 21 Aug 2020 12:50:07 +0200 Subject: [PATCH] FlexRAN agent app: trigger UE-slice assoc through IMSI regex --- cmake_targets/CMakeLists.txt | 5 + openair2/ENB_APP/flexran_agent.c | 1 - openair2/ENB_APP/flexran_agent_ran_api.c | 14 +- openair2/ENB_APP/flexran_agent_ran_api.h | 4 +- openair2/ENB_APP/flexran_apps/imsi.c | 245 +++++++++++++++++++++++ 5 files changed, 260 insertions(+), 9 deletions(-) create mode 100644 openair2/ENB_APP/flexran_apps/imsi.c diff --git a/cmake_targets/CMakeLists.txt b/cmake_targets/CMakeLists.txt index f213c7380d..e9354c39de 100644 --- a/cmake_targets/CMakeLists.txt +++ b/cmake_targets/CMakeLists.txt @@ -1103,8 +1103,13 @@ add_library(flapp_sample SHARED ${OPENAIR2_DIR}/ENB_APP/flexran_apps/sample.c ) set_target_properties(flapp_sample PROPERTIES C_VISIBILITY_PRESET hidden) +add_library(flapp_imsi SHARED + ${OPENAIR2_DIR}/ENB_APP/flexran_apps/imsi.c +) +set_target_properties(flapp_imsi PROPERTIES C_VISIBILITY_PRESET hidden) add_custom_target(flapp_all DEPENDS flapp_sample + flapp_imsi ) #include_directories(${OPENAIR2_DIR}/ENB_APP) diff --git a/openair2/ENB_APP/flexran_agent.c b/openair2/ENB_APP/flexran_agent.c index 78e5ce8dde..7d4546815f 100644 --- a/openair2/ENB_APP/flexran_agent.c +++ b/openair2/ENB_APP/flexran_agent.c @@ -115,7 +115,6 @@ error: return NULL; } - int channel_container_init = 0; int flexran_agent_start(mid_t mod_id) { diff --git a/openair2/ENB_APP/flexran_agent_ran_api.c b/openair2/ENB_APP/flexran_agent_ran_api.c index afda031b72..d126012737 100644 --- a/openair2/ENB_APP/flexran_agent_ran_api.c +++ b/openair2/ENB_APP/flexran_agent_ran_api.c @@ -3092,12 +3092,13 @@ int flexran_get_ue_dl_slice_id(mid_t mod_id, mid_t ue_id) { return slices->s[idx]->id; } -void flexran_set_ue_dl_slice_id(mid_t mod_id, mid_t ue_id, slice_id_t slice_id) { - if (!mac_is_present(mod_id)) return; +int flexran_set_ue_dl_slice_id(mid_t mod_id, mid_t ue_id, slice_id_t slice_id) { + if (!mac_is_present(mod_id)) return 0; int idx = flexran_find_dl_slice(mod_id, slice_id); - if (idx < 0) return; + if (idx < 0) return 0; pp_impl_param_t *dl = &RC.mac[mod_id]->pre_processor_dl; dl->move_UE(dl->slices, ue_id, idx); + return 1; } int flexran_get_ue_ul_slice_id(mid_t mod_id, mid_t ue_id) { @@ -3108,12 +3109,13 @@ int flexran_get_ue_ul_slice_id(mid_t mod_id, mid_t ue_id) { return slices->s[idx]->id; } -void flexran_set_ue_ul_slice_id(mid_t mod_id, mid_t ue_id, slice_id_t slice_id) { - if (!mac_is_present(mod_id)) return; +int flexran_set_ue_ul_slice_id(mid_t mod_id, mid_t ue_id, slice_id_t slice_id) { + if (!mac_is_present(mod_id)) return 0; int idx = flexran_find_ul_slice(mod_id, slice_id); - if (idx < 0) return; + if (idx < 0) return 0; pp_impl_param_t *ul = &RC.mac[mod_id]->pre_processor_ul; ul->move_UE(ul->slices, ue_id, idx); + return 1; } int flexran_create_dl_slice(mid_t mod_id, const Protocol__FlexSlice *s, void *object) { diff --git a/openair2/ENB_APP/flexran_agent_ran_api.h b/openair2/ENB_APP/flexran_agent_ran_api.h index 6abda4dcd6..79115b0a16 100644 --- a/openair2/ENB_APP/flexran_agent_ran_api.h +++ b/openair2/ENB_APP/flexran_agent_ran_api.h @@ -669,12 +669,12 @@ int flexran_set_ul_slice_algo(mid_t mod_id, Protocol__FlexSliceAlgorithm algo); /* Get the DL slice ID for a UE */ int flexran_get_ue_dl_slice_id(mid_t mod_id, mid_t ue_id); /* Set the DL slice for a UE */ -void flexran_set_ue_dl_slice_id(mid_t mod_id, mid_t ue_id, slice_id_t slice_id); +int flexran_set_ue_dl_slice_id(mid_t mod_id, mid_t ue_id, slice_id_t slice_id); /* Get the UL slice ID for a UE */ int flexran_get_ue_ul_slice_id(mid_t mod_id, mid_t ue_id); /* Set the UL slice for a UE */ -void flexran_set_ue_ul_slice_id(mid_t mod_id, mid_t ue_id, slice_id_t slice_id); +int flexran_set_ue_ul_slice_id(mid_t mod_id, mid_t ue_id, slice_id_t slice_id); /* Create slice in DL, returns the new slice index, object can be shared * library for the scheduler or NULL */ diff --git a/openair2/ENB_APP/flexran_apps/imsi.c b/openair2/ENB_APP/flexran_apps/imsi.c new file mode 100644 index 0000000000..b986f27a0a --- /dev/null +++ b/openair2/ENB_APP/flexran_apps/imsi.c @@ -0,0 +1,245 @@ +/* + * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The OpenAirInterface Software Alliance licenses this file to You under + * the OAI Public License, Version 1.1 (the "License"); you may not use this file + * except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.openairinterface.org/?page_id=698 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + *------------------------------------------------------------------------------- + * For more information about the OpenAirInterface (OAI) Software Alliance: + * contact@openairinterface.org + */ + +/*! \file imsi.c + * \brief flexran IMSI UE-slice association app + * \author Robert Schmidt, Firas Abdeljelil + * \date 2020 + * \version 0.1 + */ + +#include +#include +#include +#include "flexran_agent_common.h" +#include "flexran_agent_async.h" +#include "flexran_agent_extern.h" +#include "flexran_agent_timer.h" +#include "flexran_agent_defs.h" +#include "flexran_agent_net_comm.h" +#include "flexran_agent_ran_api.h" +#include "flexran_agent_phy.h" +#include "flexran_agent_mac.h" +#include "flexran_agent_rrc.h" +#include "flexran_agent_pdcp.h" +#include "flexran_agent_s1ap.h" +#include "flexran_agent_app.h" +#include "common/utils/LOG/log.h" +#include "assertions.h" +#include "queue.h" +typedef struct Map_regex_slice slist_data_t; +struct Map_regex_slice { + char regex_[30] ; + int slice_dl; + int slice_ul; + regex_t regex; + SLIST_ENTRY (Map_regex_slice) entries; +}; +bool reconfig = false; +int ue[MAX_MOBILES_PER_ENB]={ [0 ... MAX_MOBILES_PER_ENB - 1] = -1 }; + +SLIST_HEAD(slisthead, Map_regex_slice) head; + +int dump_list(void) { + int len = 1; + slist_data_t *datap = NULL; + SLIST_FOREACH(datap, &head, entries) { + LOG_W(FLEXRAN_AGENT, "%d: regex %s DL %d UL %d\n", len++, datap->regex_, + datap->slice_dl, datap->slice_ul); + } + return len; +} + +void ajout(char *regex, int dl, int ul) { + slist_data_t *datap = malloc(sizeof(slist_data_t)); + if (!datap) { + LOG_E(FLEXRAN_AGENT, "cannot allocate memory for slist_data_t\n"); + return; + } + strcpy(datap->regex_, regex); + datap->slice_dl = dl; + datap->slice_ul = ul; + regcomp(&datap->regex, datap->regex_, 0); + SLIST_INSERT_HEAD(&head, datap, entries); + if (ul==-1) + LOG_I(FLEXRAN_AGENT, "added new element to list: regex %s slice DL %d\n" ,regex, dl); + else if (dl==-1) + LOG_I(FLEXRAN_AGENT, "added new element to list: regex %s slice UL %d\n" ,regex, ul); + else + LOG_I(FLEXRAN_AGENT, "added new element to list: regex %s slice DL %d UL %d\n", + regex, dl, ul); +} +void remove_(char *regex) { + slist_data_t *datap = NULL; + SLIST_FOREACH(datap, &head, entries) { + if (strcmp(datap->regex_, regex) == 0) { + SLIST_REMOVE(&head, datap, Map_regex_slice, entries); + if (datap->slice_dl==-1) + LOG_I(FLEXRAN_AGENT, "removed element from list: regex %s slice UL %d\n",datap->regex_, datap->slice_ul); + else if (datap->slice_ul==-1) + LOG_I(FLEXRAN_AGENT, "removed element from list: regex %s slice DL %d\n",datap->regex_, datap->slice_dl); + else + LOG_I(FLEXRAN_AGENT, "removed element from list: regex %s slice DL %d UL %d\n", + datap->regex_, datap->slice_dl, datap->slice_ul); + regfree(&datap->regex); + free(datap); + return; + } + } + LOG_E(FLEXRAN_AGENT, "no regex %s found in list\n", regex); +} + +Protocol__FlexranMessage *matching_tick( + mid_t mod_id, + const Protocol__FlexranMessage *msg) { + const int num = flexran_get_mac_num_ues(mod_id); + for (int i = 0; i < num; i++) { + int ue_id = flexran_get_mac_ue_id(mod_id, i); + if (ue[ue_id] >= 0 && !reconfig) + continue; + rnti_t rnti = flexran_get_mac_ue_crnti(mod_id, ue_id); + uint64_t imsi = flexran_get_ue_imsi(mod_id, rnti); + char snum[20]; + sprintf(snum, "%" PRIu64, imsi); + slist_data_t *datap = NULL; + SLIST_FOREACH(datap, &head, entries) { + if (regexec(&datap->regex, snum, 0, NULL, 0) == 0) { + + int dl = datap->slice_dl; + if (dl >= 0 && dl != flexran_get_ue_dl_slice_id(mod_id, ue_id)) { + int ra = flexran_set_ue_dl_slice_id(mod_id, ue_id, dl); + if (ra) + LOG_I(FLEXRAN_AGENT, + "RNTI %04x/IMSI %s in the slice_dl %d\n", + rnti, + snum, + dl); + else + LOG_W(FLEXRAN_AGENT, "No such DL slice %d\n", dl); + } + + int ul = datap->slice_ul; + if (ul >= 0 && ul != flexran_get_ue_ul_slice_id(mod_id, ue_id)) { + int rb = flexran_set_ue_ul_slice_id(mod_id, ue_id, ul); + if (rb) + LOG_I(FLEXRAN_AGENT, + "RNTI %04x/IMSI %s in the slice_ul %d\n", + rnti, + snum, + ul); + else + LOG_W(FLEXRAN_AGENT, "No such DL slice %d\n", dl); + } + } + } + ue[ue_id] = ue_id; + } + reconfig = false; + return NULL; +} +void ajout_param(Protocol__FlexAgentReconfigurationSubsystem__ParamsEntry **p, int n_p) { + char s[30]; + reconfig = true; + bool supp=false; + bool sl_E=false; + int dl=-1; + int ul=-1; + slist_data_t *datap = NULL; + for (int i = 0; i < n_p; ++i) { + switch (p[i]->value->param_case) { + case PROTOCOL__FLEX_AGENT_RECONFIGURATION_PARAM__PARAM__NOT_SET: + LOG_I(FLEXRAN_AGENT, " param %s is not set\n", p[i]->key); + break; + case PROTOCOL__FLEX_AGENT_RECONFIGURATION_PARAM__PARAM_INTEGER: + if( strcmp(p[i]->key, "slice_dl")==0) + dl= p[i]->value->integer; + else + ul= p[i]->value->integer; + sl_E=true; + break; + case PROTOCOL__FLEX_AGENT_RECONFIGURATION_PARAM__PARAM_STR: + strcpy(s,p[i]->value->str); + break; + default: + LOG_W(FLEXRAN_AGENT, " type of param %s is unknown\n", p[i]->key); + break; + }; + } + if (!SLIST_EMPTY(&head)){ + SLIST_FOREACH(datap, &head, entries) { + if (strcmp(datap->regex_, s) == 0) { + if (datap->slice_dl!=dl || datap->slice_ul!=ul) + supp=true; + } + } + } + if (sl_E==false) + remove_(s); + else { + if (supp==true) + remove_(s); + ajout(s,dl,ul); + } + /* re-verify all UEs again */ + for (int i = 0; i < MAX_MOBILES_PER_ENB; ++i) + ue[i] = -1; +} +/* imsi_start: entry point for imsi app. Installs a callback using the timer + * API to have function imsi_tick() called every 5s */ +#define TIMER 32 +int imsi_start(mid_t mod_id, + Protocol__FlexAgentReconfigurationSubsystem__ParamsEntry **p, + int n_p) +{ + LOG_W(FLEXRAN_AGENT, "%s(): enable IMSI app timer\n", __func__); + flexran_agent_create_timer(mod_id, + 500, + FLEXRAN_AGENT_TIMER_TYPE_PERIODIC, + TIMER, + matching_tick, + NULL); + SLIST_INIT(&head); + return 0; +} + +int imsi_reconfig(mid_t mod_id, + Protocol__FlexAgentReconfigurationSubsystem__ParamsEntry **p, + int n_p) +{ + ajout_param(p, n_p); + return 0; +} + +/* stop function: cleans up before app can be unloaded. Here: stop the timer */ +int imsi_stop(mid_t mod_id) { + LOG_W(FLEXRAN_AGENT, "%s(): disable IMSI app timer\n", __func__); + flexran_agent_destroy_timer(mod_id, TIMER); + + return 0; +} + +/* app definition. visibility should be set to default so this symbol is + * reachable from outside */ +flexran_agent_app_t __attribute__ ((visibility ("default"))) app = { + .start = imsi_start, + .reconfig = imsi_reconfig, + .stop = imsi_stop +};