320 lines
9.4 KiB
C
320 lines
9.4 KiB
C
/*
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* Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The OpenAirInterface Software Alliance licenses this file to You under
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* the OAI Public License, Version 1.0 (the "License"); you may not use this file
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* except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.openairinterface.org/?page_id=698
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*-------------------------------------------------------------------------------
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* For more information about the OpenAirInterface (OAI) Software Alliance:
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* contact@openairinterface.org
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*/
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/*! \file flexran_agent.h
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* \brief top level flexran agent receive thread and itti task
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* \author Xenofon Foukas and Navid Nikaein
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* \date 2016
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* \version 0.1
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*/
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#include "flexran_agent_common.h"
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#include "log.h"
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#include "flexran_agent.h"
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#include "flexran_agent_mac_defs.h"
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#include "flexran_agent_extern.h"
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#include "assertions.h"
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#include "flexran_agent_net_comm.h"
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#include "flexran_agent_async.h"
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//#define TEST_TIMER
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flexran_agent_instance_t flexran_agent[NUM_MAX_ENB];
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char in_ip[40];
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static uint16_t in_port;
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char local_cache[40];
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void *send_thread(void *args);
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void *receive_thread(void *args);
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pthread_t new_thread(void *(*f)(void *), void *b);
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Protocol__FlexranMessage *flexran_agent_timeout(void* args);
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int agent_task_created = 0;
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/*
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* enb agent task mainly wakes up the tx thread for periodic and oneshot messages to the controller
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* and can interact with other itti tasks
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*/
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void *flexran_agent_task(void *args){
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//flexran_agent_instance_t *d = (flexran_agent_instance_t *) args;
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Protocol__FlexranMessage *msg;
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void *data;
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int size;
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err_code_t err_code;
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int priority;
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MessageDef *msg_p = NULL;
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const char *msg_name = NULL;
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instance_t instance;
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int result;
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struct flexran_agent_timer_element_s * elem = NULL;
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itti_mark_task_ready(TASK_FLEXRAN_AGENT);
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do {
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// Wait for a message
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itti_receive_msg (TASK_FLEXRAN_AGENT, &msg_p);
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DevAssert(msg_p != NULL);
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msg_name = ITTI_MSG_NAME (msg_p);
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instance = ITTI_MSG_INSTANCE (msg_p);
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switch (ITTI_MSG_ID(msg_p)) {
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case TERMINATE_MESSAGE:
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itti_exit_task ();
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break;
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case MESSAGE_TEST:
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LOG_I(FLEXRAN_AGENT, "Received %s\n", ITTI_MSG_NAME(msg_p));
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break;
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case TIMER_HAS_EXPIRED:
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msg = flexran_agent_process_timeout(msg_p->ittiMsg.timer_has_expired.timer_id, msg_p->ittiMsg.timer_has_expired.arg);
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if (msg != NULL){
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data=flexran_agent_pack_message(msg,&size);
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elem = get_timer_entry(msg_p->ittiMsg.timer_has_expired.timer_id);
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if (flexran_agent_msg_send(elem->agent_id, FLEXRAN_AGENT_DEFAULT, data, size, priority)) {
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err_code = PROTOCOL__FLEXRAN_ERR__MSG_ENQUEUING;
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goto error;
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}
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LOG_D(FLEXRAN_AGENT,"sent message with size %d\n", size);
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}
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break;
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default:
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LOG_E(FLEXRAN_AGENT, "Received unexpected message %s\n", msg_name);
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break;
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}
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result = itti_free (ITTI_MSG_ORIGIN_ID(msg_p), msg_p);
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AssertFatal (result == EXIT_SUCCESS, "Failed to free memory (%d)!\n", result);
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continue;
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error:
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LOG_E(FLEXRAN_AGENT,"flexran_agent_task: error %d occured\n",err_code);
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} while (1);
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return NULL;
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}
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void *receive_thread(void *args) {
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flexran_agent_instance_t *d = args;
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void *data;
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int size;
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int priority;
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err_code_t err_code;
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Protocol__FlexranMessage *msg;
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while (1) {
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while (flexran_agent_msg_recv(d->enb_id, FLEXRAN_AGENT_DEFAULT, &data, &size, &priority) == 0) {
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LOG_D(FLEXRAN_AGENT,"received message with size %d\n", size);
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// Invoke the message handler
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msg=flexran_agent_handle_message(d->enb_id, data, size);
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free(data);
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// check if there is something to send back to the controller
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if (msg != NULL){
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data=flexran_agent_pack_message(msg,&size);
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if (flexran_agent_msg_send(d->enb_id, FLEXRAN_AGENT_DEFAULT, data, size, priority)) {
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err_code = PROTOCOL__FLEXRAN_ERR__MSG_ENQUEUING;
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goto error;
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}
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LOG_D(FLEXRAN_AGENT,"sent message with size %d\n", size);
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}
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}
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}
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return NULL;
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error:
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LOG_E(FLEXRAN_AGENT,"receive_thread: error %d occured\n",err_code);
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return NULL;
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}
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/* utility function to create a thread */
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pthread_t new_thread(void *(*f)(void *), void *b) {
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pthread_t t;
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pthread_attr_t att;
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if (pthread_attr_init(&att)){
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fprintf(stderr, "pthread_attr_init err\n");
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exit(1);
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}
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struct sched_param sched_param_recv_thread;
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sched_param_recv_thread.sched_priority = sched_get_priority_max(SCHED_FIFO) - 1;
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pthread_attr_setschedparam(&att, &sched_param_recv_thread);
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pthread_attr_setschedpolicy(&att, SCHED_FIFO);
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if (pthread_attr_setdetachstate(&att, PTHREAD_CREATE_DETACHED)) {
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fprintf(stderr, "pthread_attr_setdetachstate err\n");
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exit(1);
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}
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if (pthread_create(&t, &att, f, b)) {
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fprintf(stderr, "pthread_create err\n");
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exit(1);
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}
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if (pthread_attr_destroy(&att)) {
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fprintf(stderr, "pthread_attr_destroy err\n");
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exit(1);
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}
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return t;
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}
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int channel_container_init = 0;
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int flexran_agent_start(mid_t mod_id, const Enb_properties_array_t* enb_properties){
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int channel_id;
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flexran_set_enb_vars(mod_id, RAN_LTE_OAI);
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flexran_agent[mod_id].enb_id = mod_id;
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/*
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* check the configuration
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*/
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if (enb_properties->properties[mod_id]->flexran_agent_cache != NULL) {
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strncpy(local_cache, enb_properties->properties[mod_id]->flexran_agent_cache, sizeof(local_cache));
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local_cache[sizeof(local_cache) - 1] = 0;
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} else {
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strcpy(local_cache, DEFAULT_FLEXRAN_AGENT_CACHE);
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}
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if (enb_properties->properties[mod_id]->flexran_agent_ipv4_address != NULL) {
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strncpy(in_ip, enb_properties->properties[mod_id]->flexran_agent_ipv4_address, sizeof(in_ip) );
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in_ip[sizeof(in_ip) - 1] = 0; // terminate string
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} else {
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strcpy(in_ip, DEFAULT_FLEXRAN_AGENT_IPv4_ADDRESS );
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}
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if (enb_properties->properties[mod_id]->flexran_agent_port != 0 ) {
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in_port = enb_properties->properties[mod_id]->flexran_agent_port;
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} else {
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in_port = DEFAULT_FLEXRAN_AGENT_PORT ;
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}
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LOG_I(FLEXRAN_AGENT,"starting enb agent client for module id %d on ipv4 %s, port %d\n",
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flexran_agent[mod_id].enb_id,
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in_ip,
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in_port);
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/*
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* Initialize the channel container
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*/
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if (!channel_container_init) {
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flexran_agent_init_channel_container();
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channel_container_init = 1;
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}
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/*Create the async channel info*/
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flexran_agent_instance_t *channel_info = flexran_agent_async_channel_info(mod_id, in_ip, in_port);
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/*Create a channel using the async channel info*/
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channel_id = flexran_agent_create_channel((void *) channel_info,
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flexran_agent_async_msg_send,
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flexran_agent_async_msg_recv,
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flexran_agent_async_release);
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if (channel_id <= 0) {
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goto error;
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}
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flexran_agent_channel_t *channel = get_channel(channel_id);
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if (channel == NULL) {
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goto error;
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}
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/*Register the channel for all underlying agents (use FLEXRAN_AGENT_MAX)*/
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flexran_agent_register_channel(mod_id, channel, FLEXRAN_AGENT_MAX);
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/*Example of registration for a specific agent(MAC):
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*flexran_agent_register_channel(mod_id, channel, FLEXRAN_AGENT_MAC);
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*/
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/*Initialize the continuous MAC stats update mechanism*/
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flexran_agent_init_cont_mac_stats_update(mod_id);
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new_thread(receive_thread, &flexran_agent[mod_id]);
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/*Initialize and register the mac xface. Must be modified later
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*for more flexibility in agent management */
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AGENT_MAC_xface *mac_agent_xface = (AGENT_MAC_xface *) malloc(sizeof(AGENT_MAC_xface));
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flexran_agent_register_mac_xface(mod_id, mac_agent_xface);
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/*
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* initilize a timer
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*/
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flexran_agent_init_timer();
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/*
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* Initialize the mac agent
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*/
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flexran_agent_init_mac_agent(mod_id);
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/*
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* start the enb agent task for tx and interaction with the underlying network function
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*/
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if (!agent_task_created) {
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if (itti_create_task (TASK_FLEXRAN_AGENT, flexran_agent_task, (void *) &flexran_agent[mod_id]) < 0) {
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LOG_E(FLEXRAN_AGENT, "Create task for FlexRAN Agent failed\n");
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return -1;
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}
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agent_task_created = 1;
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}
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LOG_I(FLEXRAN_AGENT,"client ends\n");
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return 0;
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error:
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LOG_I(FLEXRAN_AGENT,"there was an error\n");
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return 1;
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}
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Protocol__FlexranMessage *flexran_agent_timeout(void* args){
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// flexran_agent_timer_args_t *timer_args = calloc(1, sizeof(*timer_args));
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//memcpy (timer_args, args, sizeof(*timer_args));
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flexran_agent_timer_args_t *timer_args = (flexran_agent_timer_args_t *) args;
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LOG_I(FLEXRAN_AGENT, "flexran_agent %d timeout\n", timer_args->mod_id);
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//LOG_I(FLEXRAN_AGENT, "eNB action %d ENB flags %d \n", timer_args->cc_actions,timer_args->cc_report_flags);
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//LOG_I(FLEXRAN_AGENT, "UE action %d UE flags %d \n", timer_args->ue_actions,timer_args->ue_report_flags);
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return NULL;
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}
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