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srsRAN_4G
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Added initial mechanisms to receive msgs from eNB.

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master
Pedro Alvarez 7 years ago
parent a5621dd430
commit 396335afee
5 changed files with 185 additions and 19 deletions
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14
srsepc/hdr/mme/mme.h
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@ -34,9 +34,16 @@
#define MME_H
#include <cstddef>
#include "s1ap.h"
namespace srsepc{
typedef struct{
s1ap_args_t s1ap_args;
} all_args_t;
class mme
{
public:
@ -44,11 +51,16 @@ public:
static void cleanup(void);
int init(all_args_t* args);
int get_s1_mme();
private:
static mme *instance;
mme();
virtual ~mme();
static mme *m_instance;
s1ap m_s1ap;
};

27
srsepc/hdr/mme/s1ap.h
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@ -26,12 +26,39 @@
namespace srsepc{
const uint16_t S1MME_PORT = 36412;
typedef struct{
uint8_t mme_code;
uint16_t mme_group;
uint16_t tac; // 16-bit tac
uint16_t mcc; // BCD-coded with 0xF filler
uint16_t mnc; // BCD-coded with 0xF filler
std::string mme_bindx_addr;
std::string mme_name;
} s1ap_args_t;
class s1ap
{
public:
s1ap();
virtual ~s1ap();
int enb_listen();
int init(s1ap_args_t s1ap_args);
int get_s1_mme();
private:
uint8_t m_mme_code;
uint16_t m_mme_group;
uint16_t m_tac; // 16-bit tac
uint16_t m_mcc; // BCD-coded with 0xF filler
uint16_t m_mnc; // BCD-coded with 0xF filler
std::string m_mme_bindx_addr;
std::string m_mme_name;
int m_s1mme;
};
} //namespace srsepc

91
srsepc/src/main.cc
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@ -8,12 +8,12 @@
*
* This file is part of srsLTE.
*
* srsUE is free software: you can redistribute it and/or modify
* srsLTE 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.
*
* srsUE is distributed in the hope that it will be useful,
* srsLTE 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.
@ -24,20 +24,103 @@
*
*/
#include <iostream>
#include <arpa/inet.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/sctp.h>
#include <boost/program_options.hpp>
#include "mme/mme.h"
using namespace std;
using namespace srsepc;
namespace bpo = boost::program_options;
bool running = true;
/*
void
parse_args(all_args_t *args, int argc, char* argv[]) {
string mme_code;
string mme_group;
string tac;
string mcc;
string mnc;
// Command line only options
bpo::options_description general("General options");
general.add_options()
("help,h", "Produce help message")
("version,v", "Print version information and exit")
;
// Command line or config file options
bpo::options_description common("Configuration options");
common.add_options()
("mme.enb_id", bpo::value<string>(&enb_id)->default_value("0x0"), "eNodeB ID")
("mme.name", bpo::value<string>(&args->enb.s1ap.enb_name)->default_value("srsenb01"), "eNodeB Name")
("mme.cell_id", bpo::value<string>(&cell_id)->default_value("0x0"), "Cell ID")
("mme.tac", bpo::value<string>(&tac)->default_value("0x0"), "Tracking Area Code")
("mme.mcc", bpo::value<string>(&mcc)->default_value("001"), "Mobile Country Code")
("mme.mnc", bpo::value<string>(&mnc)->default_value("01"), "Mobile Network Code")
("mme.mme_bindx_addr", bpo::value<string>(&args->enb.s1ap.mme_addr)->default_value("127.0.0.1"),"IP address of MME for S1 connnection")
;
// Positional options - config file location
bpo::options_description position("Positional options");
position.add_options()
("config_file", bpo::value< string >(&config_file), "eNodeB configuration file")
;
bpo::positional_options_description p;
p.add("config_file", -1)
return;
}
*/
int
main (int argc,char * argv[] )
{
cout << "--- Software Radio Systems EPC MME ---" << endl << endl;
//signal(SIGINT, sig_int_handler);
//TODO these should be passed from config files
all_args_t args;
args.s1ap_args.mme_code = 0x01;
args.s1ap_args.mme_group = 0x0001;
args.s1ap_args.tac = 0x0001;
args.s1ap_args.mcc = 0x01;
args.s1ap_args.mnc = 0x01;
args.s1ap_args.mme_bindx_addr="127.0.0.0/24";
struct sockaddr_in enb_addr;
char readbuf[1000];
struct sctp_sndrcvinfo sri;
socklen_t fromlen;
int rd_sz;
int msg_flags;
mme *mme = mme::get_instance();
if (mme->init(&args)) {
cout << "Error initializing MME" << endl;
exit(1);
}
//Initalize S1-MME scoket
int s1mme = mme->get_s1_mme();
while(running)
{
cout << "Waiting for SCTP Msg" << endl;
rd_sz = sctp_recvmsg(s1mme, (void*) readbuf, sizeof(readbuf),(struct sockaddr*) &enb_addr, &fromlen, &sri, &msg_flags);
if (rd_sz == -1){
cout<< "Error reading from SCTP socket"<<endl;
}
cout << "Received SCTP msg." << endl;
cout << "\tSize: " << rd_sz <<endl;
cout << "\tMsg: " << readbuf << endl;
}
cout << "--- Software Radio Systems EPC MME ---" << endl << endl;
return 0;
}

30
srsepc/src/mme/mme.cc
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@ -24,12 +24,13 @@
*
*/
#include <iostream> //TODO Remove
#include <boost/thread/mutex.hpp>
#include "mme/mme.h"
namespace srsepc{
mme* mme::instance = NULL;
mme* mme::m_instance = NULL;
boost::mutex mme_instance_mutex;
mme::mme()
@ -46,21 +47,36 @@ mme*
mme::get_instance(void)
{
boost::mutex::scoped_lock lock(mme_instance_mutex);
if(NULL == instance) {
instance = new mme();
if(NULL == m_instance) {
m_instance = new mme();
}
return(instance);
return(m_instance);
}
void
mme::cleanup(void)
{
boost::mutex::scoped_lock lock(mme_instance_mutex);
if(NULL != instance) {
delete instance;
instance = NULL;
if(NULL != m_instance) {
delete m_instance;
m_instance = NULL;
}
}
int
mme::init(all_args_t* args)
{
if(m_s1ap.init(args->s1ap_args)){
std::cout << "Error initializing MME S1APP" << std::endl;
exit(-1);
}
return 0;
}
int
mme::get_s1_mme()
{
return m_s1ap.get_s1_mme();
}
} //namespace srsepc

36
srsepc/src/mme/s1ap.cc
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@ -43,11 +43,26 @@ s1ap::~s1ap()
{
}
int
s1ap::init(s1ap_args_t s1ap_args)
{
m_mme_code = s1ap_args.mme_code ;
m_mme_group = s1ap_args.mme_group;
m_tac = s1ap_args.tac;
m_mcc = s1ap_args.mcc;
m_mnc = s1ap_args.mnc;
m_mme_bindx_addr = s1ap_args.mme_bindx_addr;
m_mme_name = std::string("SRS MME");
m_s1mme = enb_listen();
return 0;
}
int
s1ap::enb_listen()
{
/*This function sets up the SCTP socket for eNBs to connect to*/
int sock_fd;
int sock_fd, err;
struct sockaddr_in s1mme_addr;//TODO make this a configurable class memeber.
sock_fd = socket (AF_INET, SOCK_SEQPACKET, IPPROTO_SCTP);
@ -59,13 +74,26 @@ s1ap::enb_listen()
//S1-MME bind
bzero(&s1mme_addr, sizeof(s1mme_addr));
s1mme_addr.sin_family = AF_INET;
s1mme_addr.sin_addr.s_addr = htonl(INADDR_ANY);
s1mme_addr.sin_port = htons(18000); //TODO define S1MME_PORT
s1mme_addr.sin_addr.s_addr = htonl(INADDR_ANY); //TODO this should use the bindx information
s1mme_addr.sin_port = htons(S1MME_PORT);
err = bind(sock_fd, (struct sockaddr*) &s1mme_addr, sizeof (s1mme_addr));
if (err != 0){
std::cout << "Error binding SCTP socket" << std::endl;
}
//Listen for connections
listen(sock_fd,SOMAXCONN);
err = listen(sock_fd,SOMAXCONN);
if (err != 0){
std::cout << "Error in SCTP socket listen" << std::endl;
}
return sock_fd;
}
int
s1ap::get_s1_mme()
{
return m_s1mme;
}
}//namespace srsepc

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