Added RLC/MAC application.
- Segmentation of upper layer PDUs into RLC data blocks and re-assembly of RLC data blocks into upper layer PDUs. - Segmentation of RLC/MAC control messages into RLC/MAC control blocks and re-assembly of RLC/MAC control messages from RLC/MAC control blocks. - NS and BSSGP protocol implementation for communication with OpenSGSN. - UDPSocket for communication with OpenBTS.zecke/hacks/quick-exit
parent
d5f0133eb2
commit
5c2f9fbfa3
|
@ -0,0 +1,236 @@
|
|||
/*GPRSSocket.cpp
|
||||
*
|
||||
* Copyright (C) 2011 Ivan Klyuchnikov
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU General Public License
|
||||
* as published by the Free Software Foundation; either version 2
|
||||
* 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 General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
||||
*/
|
||||
|
||||
#include <Sockets.h>
|
||||
#include <Threads.h>
|
||||
#include <BitVector.h>
|
||||
#include "GPRSSocket.h"
|
||||
#include "gsm_rlcmac.h"
|
||||
#include "bssgp.h"
|
||||
|
||||
#define MAX_UDP_LENGTH 1500
|
||||
|
||||
#define RLCMAC_DATA_BLOCK 0
|
||||
#define RLCMAC_CONTROL_BLOCK 1
|
||||
|
||||
// TODO: We should take ports and IP from config.
|
||||
UDPSocket GPRSRLCMACSocket(5070, "127.0.0.1", 5934);
|
||||
|
||||
void sendToOpenBTS(BitVector * vector)
|
||||
{
|
||||
char buffer[MAX_UDP_LENGTH];
|
||||
int ofs = 0;
|
||||
vector->pack((unsigned char*)&buffer[ofs]);
|
||||
ofs += vector->size() >> 3;
|
||||
COUT("Send to OpenBTS: " << *vector);
|
||||
GPRSRLCMACSocket.write(buffer, ofs);
|
||||
}
|
||||
|
||||
void writePDassignment(BitVector * dest, uint8_t TFI, uint32_t TLLI)
|
||||
{
|
||||
// TODO We should use our implementation of encode RLC/MAC Control messages.
|
||||
unsigned wp = 0;
|
||||
dest->writeField(wp,0x1,2); // Payload Type
|
||||
dest->writeField(wp,0x0,2); // Uplink block with TDMA framenumber
|
||||
dest->writeField(wp,0x1,1); // Suppl/Polling Bit
|
||||
dest->writeField(wp,0x1,3); // Uplink state flag
|
||||
dest->writeField(wp,0x2,6); // MESSAGE TYPE
|
||||
dest->writeField(wp,0x0,2); // Page Mode
|
||||
|
||||
dest->writeField(wp,0x0,1); // switch PERSIST_LEVEL: off
|
||||
dest->writeField(wp,0x2,2); // switch TLLI : on
|
||||
dest->writeField(wp,TLLI,32); // TLLI
|
||||
|
||||
dest->writeField(wp,0x0,1); // Message escape
|
||||
dest->writeField(wp,0x0,2); // Medium Access Method: Dynamic Allocation
|
||||
dest->writeField(wp,0x0,1); // RLC acknowledged mode
|
||||
|
||||
dest->writeField(wp,0x0,1); // the network establishes no new downlink TBF for the mobile station
|
||||
dest->writeField(wp,0x1,8); // timeslot 7
|
||||
dest->writeField(wp,0x1,8); // TIMING_ADVANCE_INDEX
|
||||
|
||||
dest->writeField(wp,0x0,1); // switch TIMING_ADVANCE_VALUE = off
|
||||
dest->writeField(wp,0x1,1); // switch TIMING_ADVANCE_INDEX = on
|
||||
dest->writeField(wp,0xC,4); // TIMING_ADVANCE_INDEX
|
||||
dest->writeField(wp,0x7,3); // TIMING_ADVANCE_TIMESLOT_NUMBER
|
||||
|
||||
dest->writeField(wp,0x0,1); // switch POWER CONTROL = off
|
||||
dest->writeField(wp,0x1,1); // Frequency Parameters information elements = present
|
||||
|
||||
dest->writeField(wp,0x2,3); // Training Sequence Code (TSC) = 2
|
||||
dest->writeField(wp,0x1,2); // Indirect encoding struct = present
|
||||
dest->writeField(wp,0x0,6); // MAIO
|
||||
dest->writeField(wp,0xE,4); // MA_Number
|
||||
dest->writeField(wp,0x8,4); // CHANGE_MARK_1 CHANGE_MARK_2
|
||||
|
||||
dest->writeField(wp,0x1,1); // switch TFI : on
|
||||
dest->writeField(wp,0x14,5);// TFI
|
||||
|
||||
dest->writeField(wp,0x1,1); // Power Control Parameters IE = present
|
||||
dest->writeField(wp,0x0,4); // ALPHA power control parameter
|
||||
dest->writeField(wp,0x0,1); // switch GAMMA_TN0 = off
|
||||
dest->writeField(wp,0x0,1); // switch GAMMA_TN1 = off
|
||||
dest->writeField(wp,0x0,1); // switch GAMMA_TN2 = off
|
||||
dest->writeField(wp,0x0,1); // switch GAMMA_TN3 = off
|
||||
dest->writeField(wp,0x0,1); // switch GAMMA_TN4 = off
|
||||
dest->writeField(wp,0x0,1); // switch GAMMA_TN5 = off
|
||||
dest->writeField(wp,0x0,1); // switch GAMMA_TN6 = off
|
||||
dest->writeField(wp,0x1,1); // switch GAMMA_TN7 = on
|
||||
dest->writeField(wp,0x0,5); // GAMMA_TN7
|
||||
|
||||
dest->writeField(wp,0x0,1); // TBF Starting TIME IE not present
|
||||
dest->writeField(wp,0x0,1); // Measurement Mapping struct not present
|
||||
}
|
||||
|
||||
void writePUack(BitVector * dest, uint8_t TFI, uint32_t TLLI, unsigned CV, unsigned BSN)
|
||||
{
|
||||
// TODO We should use our implementation of encode RLC/MAC Control messages.
|
||||
unsigned wp = 0;
|
||||
dest->writeField(wp,0x1,2); // payload
|
||||
dest->writeField(wp,0x0,2); // Uplink block with TDMA framenumber
|
||||
if (CV == 0) dest->writeField(wp,0x1,1); // Suppl/Polling Bit
|
||||
else dest->writeField(wp,0x0,1); //Suppl/Polling Bit
|
||||
dest->writeField(wp,0x1,3); // Uplink state flag
|
||||
|
||||
//dest->writeField(wp,0x0,1); // Reduced block sequence number
|
||||
//dest->writeField(wp,BSN+6,5); // Radio transaction identifier
|
||||
//dest->writeField(wp,0x1,1); // Final segment
|
||||
//dest->writeField(wp,0x1,1); // Address control
|
||||
|
||||
//dest->writeField(wp,0x0,2); // Power reduction: 0
|
||||
//dest->writeField(wp,TFI,5); // Temporary flow identifier
|
||||
//dest->writeField(wp,0x1,1); // Direction
|
||||
|
||||
dest->writeField(wp,0x09,6); // MESSAGE TYPE
|
||||
dest->writeField(wp,0x0,2); // Page Mode
|
||||
|
||||
dest->writeField(wp,0x0,2);
|
||||
dest->writeField(wp,TFI,5); // Uplink TFI
|
||||
dest->writeField(wp,0x0,1);
|
||||
|
||||
dest->writeField(wp,0x0,2); // CS1
|
||||
if (CV == 0) dest->writeField(wp,0x1,1); // FINAL_ACK_INDICATION
|
||||
else dest->writeField(wp,0x0,1); // FINAL_ACK_INDICATION
|
||||
dest->writeField(wp,BSN+1,7); // STARTING_SEQUENCE_NUMBER
|
||||
// RECEIVE_BLOCK_BITMAP
|
||||
for (unsigned i=0; i<8; i++) {
|
||||
dest->writeField(wp,0xff,8);
|
||||
}
|
||||
dest->writeField(wp,0x1,1); // CONTENTION_RESOLUTION_TLLI = present
|
||||
dest->writeField(wp,TLLI,8*4);
|
||||
dest->writeField(wp,0x00,4); //spare
|
||||
}
|
||||
|
||||
void RLCMACDispatchMessage(BitVector *vector)
|
||||
{
|
||||
static uint8_t rlc_data[60];
|
||||
static uint8_t tfi = 0;
|
||||
static uint32_t tlli = 0;
|
||||
static unsigned dataIndex = 0;
|
||||
static unsigned startDispatch = 0;
|
||||
unsigned blockDataLen = 0;
|
||||
unsigned readIndex = 0;
|
||||
unsigned payload = vector->readField(readIndex, 2);
|
||||
|
||||
switch (payload) {
|
||||
case RLCMAC_DATA_BLOCK:
|
||||
{
|
||||
COUT("RLCMAC_DATA_BLOCK<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<");
|
||||
RlcMacUplinkDataBlock_t * dataBlock = (RlcMacUplinkDataBlock_t *)malloc(sizeof(RlcMacUplinkDataBlock_t));
|
||||
decode_gsm_rlcmac_uplink_data(vector, dataBlock);
|
||||
COUT("RLCMAC_DATA_BLOCK_END------------------------------");
|
||||
//TODO Implement other cases.
|
||||
if (dataBlock->BSN == 0)
|
||||
{
|
||||
startDispatch = 1;
|
||||
}
|
||||
if (startDispatch)
|
||||
{
|
||||
tfi = dataBlock->TFI;
|
||||
if (dataBlock->E_1 == 0) // Extension octet follows immediately
|
||||
{
|
||||
blockDataLen = dataBlock->LENGTH_INDICATOR[0];
|
||||
}
|
||||
else
|
||||
{
|
||||
blockDataLen = 20;
|
||||
if(dataBlock->TI == 1) // TLLI field is present
|
||||
{
|
||||
tlli = dataBlock->TLLI;
|
||||
blockDataLen -= 4;
|
||||
if (dataBlock->PI == 1) // PFI is present if TI field indicates presence of TLLI
|
||||
{
|
||||
blockDataLen -= 1;
|
||||
}
|
||||
}
|
||||
}
|
||||
unsigned dataOctetNum = 0;
|
||||
for (unsigned i = dataIndex; i < dataIndex + blockDataLen; i++)
|
||||
{
|
||||
rlc_data[i] = dataBlock->RLC_DATA[dataOctetNum];
|
||||
dataOctetNum++;
|
||||
}
|
||||
dataIndex += blockDataLen;
|
||||
BitVector packetUplinkAck(23*8);
|
||||
packetUplinkAck.unhex("2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b");
|
||||
writePUack(&packetUplinkAck, tfi, tlli, dataBlock->CV, dataBlock->BSN);
|
||||
COUT("RLCMAC_CONTROL_BLOCK>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>");
|
||||
RlcMacDownlink_t * pUA = (RlcMacDownlink_t *)malloc(sizeof(RlcMacUplink_t));
|
||||
decode_gsm_rlcmac_downlink(&packetUplinkAck, pUA);
|
||||
free(pUA);
|
||||
COUT("RLCMAC_CONTROL_BLOCK_END------------------------------");
|
||||
sendToOpenBTS(&packetUplinkAck);
|
||||
}
|
||||
if (dataBlock->CV == 0)
|
||||
{
|
||||
sendToSGSN(tfi, tlli, rlc_data, dataIndex);
|
||||
dataIndex = 0;
|
||||
startDispatch = 0;
|
||||
}
|
||||
free(dataBlock);
|
||||
}
|
||||
break;
|
||||
case RLCMAC_CONTROL_BLOCK:
|
||||
{
|
||||
COUT("RLCMAC_CONTROL_BLOCK<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<");
|
||||
RlcMacUplink_t * controlBlock = (RlcMacUplink_t *)malloc(sizeof(RlcMacUplink_t));
|
||||
decode_gsm_rlcmac_uplink(vector, controlBlock);
|
||||
free(controlBlock);
|
||||
COUT("RLCMAC_CONTROL_BLOCK_END------------------------------");
|
||||
}
|
||||
break;
|
||||
default:
|
||||
COUT("Unknown RLCMAC block payload\n");
|
||||
}
|
||||
}
|
||||
|
||||
void *RLCMACSocket(void *)
|
||||
{
|
||||
BitVector *vector = new BitVector(23*8);
|
||||
GPRSRLCMACSocket.nonblocking();
|
||||
while (1) {
|
||||
char buf[MAX_UDP_LENGTH];
|
||||
int count = GPRSRLCMACSocket.read(buf, 3000);
|
||||
if (count>0) {
|
||||
vector->unpack((const unsigned char*)buf);
|
||||
COUT("Recieve from OpenBTS (MS): " << *vector);
|
||||
RLCMACDispatchMessage(vector);
|
||||
}
|
||||
}
|
||||
}
|
|
@ -0,0 +1,33 @@
|
|||
/*GPRSSocket.h
|
||||
*
|
||||
* Copyright (C) 2011 Ivan Klyuchnikov
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU General Public License
|
||||
* as published by the Free Software Foundation; either version 2
|
||||
* 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 General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
||||
*/
|
||||
|
||||
#ifndef GPRSSOCKET_H
|
||||
#define GPRSSOCKET_H
|
||||
|
||||
#include <BitVector.h>
|
||||
|
||||
void sendToOpenBTS(BitVector * vector);
|
||||
|
||||
void writePUack(BitVector * dest, uint8_t TFI, uint32_t TLLI, unsigned CV, unsigned BSN);
|
||||
|
||||
void RLCMACDispatchMessage(BitVector *vector);
|
||||
|
||||
void *RLCMACSocket(void *);
|
||||
|
||||
#endif // GPRSSOCKET_H
|
41
Makefile.am
41
Makefile.am
|
@ -27,19 +27,52 @@ noinst_LTLIBRARIES = libgprs.la
|
|||
|
||||
libgprs_la_SOURCES = \
|
||||
csn1.cpp \
|
||||
gsm_rlcmac.cpp
|
||||
gsm_rlcmac.cpp \
|
||||
bssgp.cpp \
|
||||
GPRSSocket.cpp
|
||||
|
||||
noinst_PROGRAMS = \
|
||||
RLCMACTest
|
||||
RLCMACTest \
|
||||
RLCMAC
|
||||
|
||||
noinst_HEADERS = \
|
||||
csn1.h \
|
||||
gsm_rlcmac.h
|
||||
gsm_rlcmac.h \
|
||||
bssgp.h \
|
||||
GPRSSocket.h
|
||||
|
||||
RLCMACTest_SOURCES = RLCMACTest.cpp
|
||||
RLCMACTest_LDADD = \
|
||||
libgprs.la \
|
||||
$(COMMON_LA)
|
||||
|
||||
#OPENBSC_DIR = /path to OpenBSC dir
|
||||
#OPENGGSN_DIR = /path to OpenGGGSN dir
|
||||
|
||||
RLCMAC_SOURCES = RLCMAC.cpp
|
||||
RLCMAC_LDADD = \
|
||||
libgprs.la \
|
||||
$(OPENBSC_DIR)/src/libgb/gprs_ns.o \
|
||||
$(OPENBSC_DIR)/src/libgb/gprs_bssgp.o \
|
||||
$(OPENBSC_DIR)/src/libgb/gprs_bssgp_bss.o \
|
||||
$(OPENBSC_DIR)/src/libgb/gprs_bssgp_util.o \
|
||||
$(OPENBSC_DIR)/src/libgb/gprs_ns_frgre.o \
|
||||
$(OPENGGSN_DIR)/gtp/queue.o \
|
||||
$(OPENGGSN_DIR)/gtp/lookupa.o \
|
||||
$(OPENGGSN_DIR)/gtp/pdp.o \
|
||||
$(OPENGGSN_DIR)/gtp/gtpie.o \
|
||||
$(OPENGGSN_DIR)/gtp/gtp.o \
|
||||
$(OPENBSC_DIR)/src/gprs/sgsn_libgtp.o \
|
||||
$(OPENBSC_DIR)/src/gprs/gprs_sndcp.o \
|
||||
$(OPENBSC_DIR)/src/gprs/crc24.o \
|
||||
$(OPENBSC_DIR)/src/gprs/gprs_llc.o \
|
||||
$(OPENBSC_DIR)/src/gprs/gprs_gmm.o \
|
||||
$(OPENBSC_DIR)/src/gprs/gprs_sgsn.o \
|
||||
$(OPENBSC_DIR)/src/libcommon/socket.o \
|
||||
$(OPENBSC_DIR)/src/libcommon/debug.o \
|
||||
-losmocore \
|
||||
-losmogsm \
|
||||
$(COMMON_LA)
|
||||
|
||||
#MOSTLYCLEANFILES += testSource testDestination
|
||||
|
||||
|
||||
|
|
|
@ -0,0 +1,26 @@
|
|||
/* RLCMAC.cpp
|
||||
*
|
||||
* Copyright (C) 2011 Ivan Klyuchnikov
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU General Public License
|
||||
* as published by the Free Software Foundation; either version 2
|
||||
* 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 General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
||||
*/
|
||||
|
||||
#include "bssgp.h"
|
||||
|
||||
int main(int argc, char *argv[])
|
||||
{
|
||||
// Start RLC/MAC server for communication with OpenBTS and OsmoSGSN.
|
||||
RLCMACServer();
|
||||
}
|
|
@ -0,0 +1,363 @@
|
|||
/* bssgp.cpp
|
||||
*
|
||||
* Copyright (C) 2011 Ivan Klyuchnikov
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU General Public License
|
||||
* as published by the Free Software Foundation; either version 2
|
||||
* 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 General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
||||
*/
|
||||
|
||||
#include <arpa/inet.h>
|
||||
#include <Threads.h>
|
||||
#include "GPRSSocket.h"
|
||||
#include "bssgp.h"
|
||||
|
||||
// TODO: We should move this parameters to config file.
|
||||
#define SGSN_IP "127.0.0.1"
|
||||
#define SGSN_PORT 23000
|
||||
#define CELL_ID 3
|
||||
#define BVCI 7
|
||||
#define NSEI 3
|
||||
#define NSVCI 4
|
||||
#define MNC 1
|
||||
#define MCC 1
|
||||
#define LAC 1000
|
||||
#define RAC 1
|
||||
|
||||
#define QOS_PROFILE 0
|
||||
#define BSSGP_HDR_LEN 20
|
||||
#define NS_HDR_LEN 4
|
||||
#define MAX_LEN_PDU 100
|
||||
#define IE_PDU 14
|
||||
#define BLOCK_DATA_LEN 16
|
||||
|
||||
#define BLOCK_LEN 23
|
||||
|
||||
uint16_t bvci = BVCI;
|
||||
uint16_t nsei = NSEI;
|
||||
uint8_t TFI;
|
||||
struct bssgp_bvc_ctx *bctx = btsctx_alloc(bvci, nsei);
|
||||
struct gprs_nsvc *nsvc;
|
||||
struct gprs_ns_inst *sgsn_nsi;
|
||||
struct sgsn_instance *sgsn;
|
||||
void *tall_bsc_ctx;
|
||||
|
||||
// Send RLC data to OpenBTS.
|
||||
void sendRLC(uint32_t tlli, uint8_t *pdu, unsigned startIndex, unsigned endIndex)
|
||||
{
|
||||
unsigned wp = 0;
|
||||
BitVector resultVector(BLOCK_LEN*8);
|
||||
resultVector.unhex("2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b");
|
||||
// TODO: Encode downlink RLC/MAC data block.
|
||||
sendToOpenBTS(&resultVector);
|
||||
}
|
||||
|
||||
/* Receive a BSSGP PDU from a BSS on a PTP BVCI */
|
||||
int gprs_bssgp_bss_rx_ptp(struct msgb *msg, struct tlv_parsed *tp, struct bssgp_bvc_ctx *bctx)
|
||||
{
|
||||
struct bssgp_normal_hdr *bgph = (struct bssgp_normal_hdr *) msgb_bssgph(msg);
|
||||
uint8_t pdu_type = bgph->pdu_type;
|
||||
uint8_t pdu[MAX_LEN_PDU];
|
||||
unsigned rc = 0;
|
||||
unsigned dataIndex = 0;
|
||||
unsigned numBlocks = 0;
|
||||
unsigned i = 0;
|
||||
unsigned j = 0;
|
||||
unsigned pduIndex = 0;
|
||||
struct bssgp_ud_hdr *budh;
|
||||
|
||||
/* If traffic is received on a BVC that is marked as blocked, the
|
||||
* received PDU shall not be accepted and a STATUS PDU (Cause value:
|
||||
* BVC Blocked) shall be sent to the peer entity on the signalling BVC */
|
||||
if (bctx->state & BVC_S_BLOCKED && pdu_type != BSSGP_PDUT_STATUS)
|
||||
{
|
||||
uint16_t bvci = msgb_bvci(msg);
|
||||
LOGP(DBSSGP, LOGL_NOTICE, "rx BVC_S_BLOCKED\n");
|
||||
return bssgp_tx_status(BSSGP_CAUSE_BVCI_BLOCKED, &bvci, msg);
|
||||
}
|
||||
|
||||
switch (pdu_type) {
|
||||
case BSSGP_PDUT_DL_UNITDATA:
|
||||
LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP_PDUT_DL_UNITDATA\n");
|
||||
budh = (struct bssgp_ud_hdr *) msgb_bssgph(msg);
|
||||
LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP TLLI=0x%08x \n", ntohl(budh->tlli));
|
||||
for (i = 4; i < MAX_LEN_PDU; i++)
|
||||
{
|
||||
LOGP(DBSSGP, LOGL_NOTICE, "SERCH data = -0x%02x\n", budh ->data[i]);
|
||||
if(budh ->data[i] == IE_PDU)
|
||||
{
|
||||
pduIndex = i+2;
|
||||
break;
|
||||
}
|
||||
}
|
||||
for (i = pduIndex; i < pduIndex + (budh->data[pduIndex-1]&0x7f); i++)
|
||||
{
|
||||
LOGP(DBSSGP, LOGL_NOTICE, "-0x%02x\n", budh ->data[i]);
|
||||
pdu[dataIndex] = budh ->data[i];
|
||||
dataIndex++;
|
||||
}
|
||||
DEBUGP(DBSSGP, "BSSGP Catch from SGSN=%u octets. Send it to OpenBTS.\n", dataIndex);
|
||||
if (dataIndex > BLOCK_DATA_LEN)
|
||||
{
|
||||
int blockDataLen = BLOCK_DATA_LEN;
|
||||
numBlocks = dataIndex/BLOCK_DATA_LEN;
|
||||
int ost = dataIndex%BLOCK_DATA_LEN;
|
||||
int startIndex = 0;
|
||||
int endIndex = 0;
|
||||
if (dataIndex%BLOCK_DATA_LEN > 0)
|
||||
{
|
||||
numBlocks++;
|
||||
}
|
||||
for (i = 0; i < numBlocks; i++)
|
||||
{
|
||||
if (i == numBlocks-1)
|
||||
{
|
||||
blockDataLen = ost;
|
||||
}
|
||||
endIndex = startIndex+blockDataLen;
|
||||
sendRLC(ntohl(budh->tlli), pdu, startIndex, endIndex);
|
||||
startIndex += blockDataLen;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
sendRLC(ntohl(budh->tlli), pdu, 0, dataIndex);
|
||||
}
|
||||
break;
|
||||
case BSSGP_PDUT_PAGING_PS:
|
||||
LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP_PDUT_PAGING_PS\n");
|
||||
break;
|
||||
case BSSGP_PDUT_PAGING_CS:
|
||||
LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP_PDUT_PAGING_CS\n");
|
||||
break;
|
||||
case BSSGP_PDUT_RA_CAPA_UPDATE_ACK:
|
||||
LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP_PDUT_RA_CAPA_UPDATE_ACK\n");
|
||||
break;
|
||||
case BSSGP_PDUT_FLOW_CONTROL_BVC_ACK:
|
||||
LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP_PDUT_FLOW_CONTROL_BVC_ACK\n");
|
||||
break;
|
||||
case BSSGP_PDUT_FLOW_CONTROL_MS_ACK:
|
||||
LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP_PDUT_FLOW_CONTROL_MS_ACK\n");
|
||||
break;
|
||||
default:
|
||||
DEBUGP(DBSSGP, "BSSGP BVCI=%u PDU type 0x%02x unknown\n", bctx->bvci, pdu_type);
|
||||
rc = bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, msg);
|
||||
break;
|
||||
}
|
||||
return rc;
|
||||
}
|
||||
|
||||
/* Receive a BSSGP PDU from a SGSN on a SIGNALLING BVCI */
|
||||
int gprs_bssgp_bss_rx_sign(struct msgb *msg, struct tlv_parsed *tp, struct bssgp_bvc_ctx *bctx)
|
||||
{
|
||||
struct bssgp_normal_hdr *bgph = (struct bssgp_normal_hdr *) msgb_bssgph(msg);
|
||||
int rc = 0;
|
||||
switch (bgph->pdu_type) {
|
||||
case BSSGP_PDUT_STATUS:
|
||||
/* Some exception has occurred */
|
||||
DEBUGP(DBSSGP, "BSSGP BVCI=%u Rx BVC STATUS\n", bctx->bvci);
|
||||
/* FIXME: send NM_STATUS.ind to NM */
|
||||
break;
|
||||
case BSSGP_PDUT_SUSPEND_ACK:
|
||||
LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP_PDUT_SUSPEND_ACK\n");
|
||||
break;
|
||||
case BSSGP_PDUT_SUSPEND_NACK:
|
||||
LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP_PDUT_SUSPEND_NACK\n");
|
||||
break;
|
||||
case BSSGP_PDUT_BVC_RESET_ACK:
|
||||
LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP_PDUT_BVC_RESET_ACK\n");
|
||||
break;
|
||||
case BSSGP_PDUT_PAGING_PS:
|
||||
LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP_PDUT_PAGING_PS\n");
|
||||
break;
|
||||
case BSSGP_PDUT_PAGING_CS:
|
||||
LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP_PDUT_PAGING_CS\n");
|
||||
break;
|
||||
case BSSGP_PDUT_RESUME_ACK:
|
||||
LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP_PDUT_RESUME_ACK\n");
|
||||
break;
|
||||
case BSSGP_PDUT_RESUME_NACK:
|
||||
LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP_PDUT_RESUME_NACK\n");
|
||||
break;
|
||||
case BSSGP_PDUT_FLUSH_LL:
|
||||
LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP_PDUT_FLUSH_LL\n");
|
||||
break;
|
||||
case BSSGP_PDUT_BVC_BLOCK_ACK:
|
||||
LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP_PDUT_SUSPEND_ACK\n");
|
||||
break;
|
||||
case BSSGP_PDUT_BVC_UNBLOCK_ACK:
|
||||
LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP_PDUT_BVC_UNBLOCK_ACK\n");
|
||||
break;
|
||||
case BSSGP_PDUT_SGSN_INVOKE_TRACE:
|
||||
LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP_PDUT_SGSN_INVOKE_TRACE\n");
|
||||
break;
|
||||
default:
|
||||
DEBUGP(DBSSGP, "BSSGP BVCI=%u Rx PDU type 0x%02x unknown\n", bctx->bvci, bgph->pdu_type);
|
||||
rc = bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, msg);
|
||||
break;
|
||||
}
|
||||
return rc;
|
||||
}
|
||||
|
||||
int gprs_bssgp_bss_rcvmsg(struct msgb *msg)
|
||||
{
|
||||
struct bssgp_normal_hdr *bgph = (struct bssgp_normal_hdr *) msgb_bssgph(msg);
|
||||
struct bssgp_ud_hdr *budh = (struct bssgp_ud_hdr *) msgb_bssgph(msg);
|
||||
struct tlv_parsed tp;
|
||||
uint8_t pdu_type = bgph->pdu_type;
|
||||
uint16_t ns_bvci = msgb_bvci(msg);
|
||||
int data_len;
|
||||
int rc = 0;
|
||||
|
||||
/* Identifiers from DOWN: NSEI, BVCI (both in msg->cb) */
|
||||
|
||||
/* UNITDATA BSSGP headers have TLLI in front */
|
||||
if (pdu_type != BSSGP_PDUT_UL_UNITDATA && pdu_type != BSSGP_PDUT_DL_UNITDATA)
|
||||
{
|
||||
data_len = msgb_bssgp_len(msg) - sizeof(*bgph);
|
||||
rc = bssgp_tlv_parse(&tp, bgph->data, data_len);
|
||||
}
|
||||
else
|
||||
{
|
||||
data_len = msgb_bssgp_len(msg) - sizeof(*budh);
|
||||
rc = bssgp_tlv_parse(&tp, budh->data, data_len);
|
||||
}
|
||||
|
||||
/* look-up or create the BTS context for this BVC */
|
||||
bctx = btsctx_by_bvci_nsei(ns_bvci, msgb_nsei(msg));
|
||||
|
||||
/* Only a RESET PDU can create a new BVC context */
|
||||
if (!bctx)
|
||||
{
|
||||
bctx = btsctx_alloc(ns_bvci, msgb_nsei(msg));
|
||||
}
|
||||
|
||||
if (!bctx && pdu_type != BSSGP_PDUT_BVC_RESET_ACK)
|
||||
{
|
||||
LOGP(DBSSGP, LOGL_NOTICE, "NSEI=%u/BVCI=%u Rejecting PDU "
|
||||
"type %u for unknown BVCI\n", msgb_nsei(msg), ns_bvci,
|
||||
pdu_type);
|
||||
return bssgp_tx_status(BSSGP_CAUSE_UNKNOWN_BVCI, NULL, msg);
|
||||
}
|
||||
|
||||
if (bctx)
|
||||
{
|
||||
log_set_context(BSC_CTX_BVC, bctx);
|
||||
rate_ctr_inc(&bctx->ctrg->ctr[BSSGP_CTR_PKTS_IN]);
|
||||
rate_ctr_add(&bctx->ctrg->ctr[BSSGP_CTR_BYTES_IN], msgb_bssgp_len(msg));
|
||||
}
|
||||
|
||||
if (ns_bvci == BVCI_SIGNALLING)
|
||||
{
|
||||
LOGP(DBSSGP, LOGL_NOTICE, "rx BVCI_SIGNALLING gprs_bssgp_rx_sign\n");
|
||||
rc = gprs_bssgp_bss_rx_sign(msg, &tp, bctx);
|
||||
}
|
||||
else if (ns_bvci == BVCI_PTM)
|
||||
{
|
||||
LOGP(DBSSGP, LOGL_NOTICE, "rx BVCI_PTM bssgp_tx_status\n");
|
||||
rc = bssgp_tx_status(BSSGP_CAUSE_PDU_INCOMP_FEAT, NULL, msg);
|
||||
}
|
||||
else
|
||||
{
|
||||
LOGP(DBSSGP, LOGL_NOTICE, "rx BVCI_PTP gprs_bssgp_rx_ptp\n");
|
||||
rc = gprs_bssgp_bss_rx_ptp(msg, &tp, bctx);
|
||||
}
|
||||
return rc;
|
||||
}
|
||||
|
||||
|
||||
int sgsn_ns_cb(enum gprs_ns_evt event, struct gprs_nsvc *nsvc, struct msgb *msg, uint16_t bvci)
|
||||
{
|
||||
int rc = 0;
|
||||
switch (event) {
|
||||
case GPRS_NS_EVT_UNIT_DATA:
|
||||
/* hand the message into the BSSGP implementation */
|
||||
rc = gprs_bssgp_bss_rcvmsg(msg);
|
||||
break;
|
||||
default:
|
||||
LOGP(DGPRS, LOGL_ERROR, "RLCMAC: Unknown event %u from NS\n", event);
|
||||
if (msg)
|
||||
talloc_free(msg);
|
||||
rc = -EIO;
|
||||
break;
|
||||
}
|
||||
return rc;
|
||||
}
|
||||
|
||||
// Send RLC data to SGSN.
|
||||
void sendToSGSN(uint8_t tfi, uint32_t tlli, uint8_t * rlc_data, unsigned dataLen)
|
||||
{
|
||||
const uint8_t qos_profile = QOS_PROFILE;
|
||||
struct msgb *llc_pdu;
|
||||
unsigned msgLen = NS_HDR_LEN + BSSGP_HDR_LEN + dataLen;
|
||||
TFI = tfi;
|
||||
bctx->cell_id = CELL_ID;
|
||||
bctx->nsei = NSEI;
|
||||
bctx->ra_id.mnc = MNC;
|
||||
bctx->ra_id.mcc = MCC;
|
||||
bctx->ra_id.lac = LAC;
|
||||
bctx->ra_id.rac = RAC;
|
||||
bctx->bvci = BVCI;
|
||||
LOGP(DBSSGP, LOGL_DEBUG, "Data len %u TLLI 0x%08x , TFI 0x%02x", dataLen, tlli, tfi);
|
||||
//for (unsigned i = 0; i < dataLen; i++)
|
||||
// LOGP(DBSSGP, LOGL_DEBUG, " Data[%u] = %u", i, rlc_data[i]);
|
||||
llc_pdu = msgb_alloc_headroom(msgLen, msgLen,"llc_pdu");
|
||||
msgb_tvlv_push(llc_pdu, BSSGP_IE_LLC_PDU, sizeof(uint8_t)*dataLen, rlc_data);
|
||||
bssgp_tx_ul_ud(bctx, tlli, &qos_profile, llc_pdu);
|
||||
}
|
||||
|
||||
void RLCMACServer()
|
||||
{
|
||||
uint16_t nsvci = NSVCI;
|
||||
|
||||
// Socket for reading BitVectors (RLC/MAC Frames) from OpenBTS application.
|
||||
Thread RLCMACInterface;
|
||||
RLCMACInterface.start(RLCMACSocket,NULL);
|
||||
|
||||
osmo_init_logging(&log_info);
|
||||
sgsn_nsi = gprs_ns_instantiate(&sgsn_ns_cb);
|
||||
bssgp_nsi = sgsn_nsi;
|
||||
|
||||
if (!bssgp_nsi)
|
||||
{
|
||||
LOGP(DGPRS, LOGL_ERROR, "Unable to instantiate NS\n");
|
||||
exit(1);
|
||||
}
|
||||
|
||||
bctx->cell_id = CELL_ID;
|
||||
bctx->nsei = NSEI;
|
||||
bctx->ra_id.mnc = MNC;
|
||||
bctx->ra_id.mcc = MCC;
|
||||
bctx->ra_id.lac = LAC;
|
||||
bctx->ra_id.rac = RAC;
|
||||
bctx->bvci = BVCI;
|
||||
uint8_t cause = 39;
|
||||
gprs_ns_nsip_listen(sgsn_nsi);
|
||||
|
||||
struct sockaddr_in dest;
|
||||
dest.sin_family = AF_INET;
|
||||
dest.sin_port = htons(SGSN_PORT);
|
||||
inet_aton(SGSN_IP, &dest.sin_addr);
|
||||
|
||||
nsvc = nsip_connect(sgsn_nsi, &dest, nsei, nsvci);
|
||||
unsigned i = 0;
|
||||
while (1)
|
||||
{
|
||||
osmo_select_main(0);
|
||||
if (i == 7)
|
||||
{
|
||||
bssgp_tx_bvc_reset(bctx, nsvc, bvci, cause);
|
||||
}
|
||||
i++;
|
||||
}
|
||||
}
|
|
@ -0,0 +1,53 @@
|
|||
/* bssgp.h
|
||||
*
|
||||
* Copyright (C) 2011 Ivan Klyuchnikov
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU General Public License
|
||||
* as published by the Free Software Foundation; either version 2
|
||||
* 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 General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
||||
*/
|
||||
|
||||
#ifndef BSSGP_H
|
||||
#define BSSGP_H
|
||||
|
||||
extern "C" {
|
||||
#include <osmocom/core/talloc.h>
|
||||
#include <osmocom/core/rate_ctr.h>
|
||||
#include <openbsc/debug.h>
|
||||
#include <openbsc/signal.h>
|
||||
#include <openbsc/gprs_ns.h>
|
||||
#include <openbsc/gprs_bssgp.h>
|
||||
#include <osmocom/core/application.h>
|
||||
|
||||
int bssgp_tx_bvc_reset(struct bssgp_bvc_ctx *bctx, struct gprs_nsvc * nsvc, uint16_t bvci, uint8_t cause);
|
||||
|
||||
int bssgp_tx_ul_ud(struct bssgp_bvc_ctx *bctx, uint32_t tlli, const uint8_t *qos_profile, struct msgb *llc_pdu);
|
||||
|
||||
struct bssgp_bvc_ctx *btsctx_alloc(uint16_t bvci, uint16_t nsei);
|
||||
}
|
||||
|
||||
void sendRLC(uint32_t tlli, uint8_t *pdu, unsigned startIndex, unsigned endIndex);
|
||||
|
||||
int gprs_bssgp_bss_rx_ptp(struct msgb *msg, struct tlv_parsed *tp, struct bssgp_bvc_ctx *bctx);
|
||||
|
||||
int gprs_bssgp_bss_rx_sign(struct msgb *msg, struct tlv_parsed *tp, struct bssgp_bvc_ctx *bctx);
|
||||
|
||||
int gprs_bssgp_bss_rcvmsg(struct msgb *msg);
|
||||
|
||||
int sgsn_ns_cb(enum gprs_ns_evt event, struct gprs_nsvc *nsvc, struct msgb *msg, uint16_t bvci);
|
||||
|
||||
void sendToSGSN(uint8_t tfi, uint32_t tlli, uint8_t * rlc_data, unsigned dataLen);
|
||||
|
||||
void RLCMACServer();
|
||||
|
||||
#endif // BSSGP_H
|
Loading…
Reference in New Issue