266 lines
8.4 KiB
C
266 lines
8.4 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 1.1 (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 and shahab SHARIAT BAGHERI
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* \date 2017
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* \version 0.1
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*/
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#define _GNU_SOURCE
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#include "flexran_agent.h"
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#include <common/utils/system.h>
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#include <pthread.h>
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#include <arpa/inet.h>
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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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MessageDef *msg_p = NULL;
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int result;
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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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switch (ITTI_MSG_ID(msg_p)) {
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case TERMINATE_MESSAGE:
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LOG_W(FLEXRAN_AGENT, " *** Exiting FLEXRAN thread\n");
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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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default:
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LOG_E(FLEXRAN_AGENT, "Received unexpected message %s\n", ITTI_MSG_NAME (msg_p));
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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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} 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_info_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=0;
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Protocol__FlexranMessage *msg;
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pthread_setname_np(pthread_self(), "flexran_rx_thr");
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while (1) {
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while ((size = flexran_agent_msg_recv(d->mod_id, FLEXRAN_AGENT_DEFAULT, &data, &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->mod_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->mod_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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if (err_code != 0)
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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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int channel_container_init = 0;
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int flexran_agent_start(mid_t mod_id)
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{
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flexran_agent_info_t *flexran = RC.flexran[mod_id];
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int channel_id;
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char *in_ip = flexran->remote_ipv4_addr;
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uint16_t in_port = flexran->remote_port;
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/* if this agent is disabled, return and don't do anything */
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if (!flexran->enabled) {
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LOG_I(FLEXRAN_AGENT, "FlexRAN Agent for eNB %d is DISABLED\n", mod_id);
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return 100;
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}
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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_async_channel_t *channel_info = flexran_agent_async_channel_info(mod_id, in_ip, in_port);
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if (!channel_info) {
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LOG_E(FLEXRAN_AGENT, "could not create channel_info\n");
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exit(1);
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}
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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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LOG_E(FLEXRAN_AGENT, "could not create channel\n");
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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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LOG_E(FLEXRAN_AGENT, "could not get channel for channel_id %d\n", channel_id);
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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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pthread_t t;
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threadCreate(&t, receive_thread, flexran, "flexran", -1, OAI_PRIORITY_RT);
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/* Register and initialize the control modules depending on capabilities.
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* After registering, calling flexran_agent_get_*_xface() tells whether a
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* control module is operational */
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uint32_t caps = flexran_get_capabilities_mask(mod_id);
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LOG_I(FLEXRAN_AGENT, "Agent handles BS ID %ld, capabilities=0x%x => handling%s%s%s%s%s%s%s%s%s\n",
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flexran_get_bs_id(mod_id), caps,
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FLEXRAN_CAP_LOPHY(caps) ? " LOPHY" : "",
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FLEXRAN_CAP_HIPHY(caps) ? " HIPHY" : "",
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FLEXRAN_CAP_LOMAC(caps) ? " LOMAC" : "",
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FLEXRAN_CAP_HIMAC(caps) ? " HIMAC" : "",
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FLEXRAN_CAP_RLC(caps) ? " RLC" : "",
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FLEXRAN_CAP_PDCP(caps) ? " PDCP" : "",
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FLEXRAN_CAP_SDAP(caps) ? " SDAP" : "",
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FLEXRAN_CAP_RRC(caps) ? " RRC" : "",
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FLEXRAN_CAP_S1AP(caps) ? " S1AP" : "");
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if (FLEXRAN_CAP_LOPHY(caps) || FLEXRAN_CAP_HIPHY(caps)) {
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flexran_agent_register_phy_xface(mod_id);
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LOG_I(FLEXRAN_AGENT, "registered PHY interface/CM for eNB %d\n", mod_id);
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}
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if (FLEXRAN_CAP_LOMAC(caps) || FLEXRAN_CAP_HIMAC(caps)) {
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flexran_agent_register_mac_xface(mod_id);
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flexran_agent_init_mac_agent(mod_id);
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LOG_I(FLEXRAN_AGENT, "registered MAC interface/CM for eNB %d\n", mod_id);
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}
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if (FLEXRAN_CAP_RRC(caps)) {
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flexran_agent_register_rrc_xface(mod_id);
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LOG_I(FLEXRAN_AGENT, "registered RRC interface/CM for eNB %d\n", mod_id);
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}
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if (FLEXRAN_CAP_PDCP(caps)) {
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flexran_agent_register_pdcp_xface(mod_id);
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LOG_I(FLEXRAN_AGENT, "registered PDCP interface/CM for eNB %d\n", mod_id);
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}
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if (FLEXRAN_CAP_S1AP(caps)) {
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flexran_agent_register_s1ap_xface(mod_id);
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LOG_I(FLEXRAN_AGENT, "registered S1AP interface/CM for eNB %d\n", mod_id);
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}
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/*
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* initilize a timer
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*/
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flexran_agent_timer_init(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, flexran) < 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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/* Init the app sublayer */
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flexran_agent_app_init(mod_id);
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pthread_mutex_init(&flexran->mutex_node_ctrl, NULL);
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pthread_cond_init(&flexran->cond_node_ctrl, NULL);
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if (flexran->node_ctrl_state == ENB_WAIT) {
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/* wait three seconds before showing message and waiting "for real".
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* This way, the message is (hopefully...) the last one and the user knows
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* what is happening. If the controller sends a reconfiguration message in
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* the meantime, the softmodem will never wait */
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sleep(3);
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LOG_I(ENB_APP, " * eNB %d: Waiting for FlexRAN RTController command *\n", mod_id);
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pthread_mutex_lock(&flexran->mutex_node_ctrl);
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while (ENB_NORMAL_OPERATION != flexran->node_ctrl_state)
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pthread_cond_wait(&flexran->cond_node_ctrl, &flexran->mutex_node_ctrl);
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pthread_mutex_unlock(&flexran->mutex_node_ctrl);
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/* reconfigure RRC again, the agent might have changed the configuration */
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MessageDef *msg_p = itti_alloc_new_message(TASK_ENB_APP, 0, RRC_CONFIGURATION_REQ);
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RRC_CONFIGURATION_REQ(msg_p) = RC.rrc[mod_id]->configuration;
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itti_send_msg_to_task(TASK_RRC_ENB, ENB_MODULE_ID_TO_INSTANCE(mod_id), msg_p);
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}
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return 0;
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error:
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LOG_E(FLEXRAN_AGENT, "%s(): there was an error\n", __func__);
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return 1;
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}
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