Separation of GPRS PCU application from main OpenBTS code and changing PCU architecture (First step).
1. pcu - main program for GPRS PCU. 2. gprs_rlcmac - RLC/MAC layer implementation for PCU. Added list for TBF, TBF allocation, establishment, release. 3. gprs_bssgp_pcu - BSSGP protocol implementation for PCU. 4. pcu_l1_if - interface for communication PCU application with OpenBTS.
This commit is contained in:
parent
3450640624
commit
8ee6051b72
421
GPRSSocket.cpp
421
GPRSSocket.cpp
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/*GPRSSocket.cpp
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*
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* Copyright (C) 2011 Ivan Klyuchnikov
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <Sockets.h>
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#include <Threads.h>
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#include <BitVector.h>
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#include <gsmtap.h>
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#include "GPRSSocket.h"
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#include "bssgp.h"
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#define MAX_UDP_LENGTH 1500
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#define RLCMAC_DATA_BLOCK 0
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#define RLCMAC_CONTROL_BLOCK 1
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// TODO: We should take ports and IP from config.
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UDPSocket GPRSRLCMACSocket(5070, "127.0.0.1", 5934);
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UDPSocket GSMTAPSocket(5077, "127.0.0.1", 4729);
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void sendToGSMTAP(uint8_t * data, unsigned len)
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{
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char buffer[MAX_UDP_LENGTH];
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int ofs = 0;
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// Build header
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struct gsmtap_hdr *header = (struct gsmtap_hdr *)buffer;
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header->version = 2;
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header->hdr_len = sizeof(struct gsmtap_hdr) >> 2;
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header->type = 0x08;
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header->timeslot = 5;
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header->arfcn = 0;
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header->signal_dbm = 0;
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header->snr_db = 0;
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header->frame_number = 0;
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header->sub_type = 0;
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header->antenna_nr = 0;
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header->sub_slot = 0;
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header->res = 0;
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ofs += sizeof(*header);
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// Add frame data
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unsigned j = 0;
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for (unsigned i = ofs; i < len+ofs; i++)
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{
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buffer[i] = (char)data[j];
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j++;
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}
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ofs += len;
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// Write the GSMTAP packet
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GSMTAPSocket.write(buffer, ofs);
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}
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void sendToOpenBTS(BitVector * vector)
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{
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char buffer[MAX_UDP_LENGTH];
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int ofs = 0;
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vector->pack((unsigned char*)&buffer[ofs]);
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ofs += vector->size() >> 3;
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COUT("Send to OpenBTS: " << *vector);
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GPRSRLCMACSocket.write(buffer, ofs);
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}
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void writePDassignment(BitVector * dest, uint8_t TFI, uint32_t TLLI)
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{
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// TODO We should use our implementation of encode RLC/MAC Control messages.
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unsigned wp = 0;
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dest->writeField(wp,0x1,2); // Payload Type
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dest->writeField(wp,0x0,2); // Uplink block with TDMA framenumber
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dest->writeField(wp,0x1,1); // Suppl/Polling Bit
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dest->writeField(wp,0x1,3); // Uplink state flag
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dest->writeField(wp,0x2,6); // MESSAGE TYPE
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dest->writeField(wp,0x0,2); // Page Mode
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dest->writeField(wp,0x0,1); // switch PERSIST_LEVEL: off
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dest->writeField(wp,0x2,2); // switch TLLI : on
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dest->writeField(wp,TLLI,32); // TLLI
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dest->writeField(wp,0x0,1); // Message escape
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dest->writeField(wp,0x0,2); // Medium Access Method: Dynamic Allocation
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dest->writeField(wp,0x0,1); // RLC acknowledged mode
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dest->writeField(wp,0x0,1); // the network establishes no new downlink TBF for the mobile station
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dest->writeField(wp,0x1,8); // timeslot 7
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dest->writeField(wp,0x1,8); // TIMING_ADVANCE_INDEX
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dest->writeField(wp,0x0,1); // switch TIMING_ADVANCE_VALUE = off
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dest->writeField(wp,0x1,1); // switch TIMING_ADVANCE_INDEX = on
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dest->writeField(wp,0xC,4); // TIMING_ADVANCE_INDEX
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dest->writeField(wp,0x7,3); // TIMING_ADVANCE_TIMESLOT_NUMBER
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dest->writeField(wp,0x0,1); // switch POWER CONTROL = off
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dest->writeField(wp,0x1,1); // Frequency Parameters information elements = present
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dest->writeField(wp,0x2,3); // Training Sequence Code (TSC) = 2
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dest->writeField(wp,0x1,2); // Indirect encoding struct = present
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dest->writeField(wp,0x0,6); // MAIO
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dest->writeField(wp,0xE,4); // MA_Number
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dest->writeField(wp,0x8,4); // CHANGE_MARK_1 CHANGE_MARK_2
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dest->writeField(wp,0x1,1); // switch TFI : on
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dest->writeField(wp,0x14,5);// TFI
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dest->writeField(wp,0x1,1); // Power Control Parameters IE = present
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dest->writeField(wp,0x0,4); // ALPHA power control parameter
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dest->writeField(wp,0x0,1); // switch GAMMA_TN0 = off
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dest->writeField(wp,0x0,1); // switch GAMMA_TN1 = off
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dest->writeField(wp,0x0,1); // switch GAMMA_TN2 = off
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dest->writeField(wp,0x0,1); // switch GAMMA_TN3 = off
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dest->writeField(wp,0x0,1); // switch GAMMA_TN4 = off
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dest->writeField(wp,0x0,1); // switch GAMMA_TN5 = off
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dest->writeField(wp,0x0,1); // switch GAMMA_TN6 = off
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dest->writeField(wp,0x1,1); // switch GAMMA_TN7 = on
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dest->writeField(wp,0x0,5); // GAMMA_TN7
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dest->writeField(wp,0x0,1); // TBF Starting TIME IE not present
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dest->writeField(wp,0x0,1); // Measurement Mapping struct not present
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}
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void writePUassignment(BitVector * dest, uint8_t TFI, uint32_t TLLI)
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{
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// TODO We should use our implementation of encode RLC/MAC Control messages.
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unsigned wp = 0;
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dest->writeField(wp,0x1,2); // Payload Type
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dest->writeField(wp,0x0,2); // Uplink block with TDMA framenumber
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dest->writeField(wp,0x1,1); // Suppl/Polling Bit
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dest->writeField(wp,0x1,3); // Uplink state flag
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dest->writeField(wp,0xa,6); // MESSAGE TYPE
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dest->writeField(wp,0x0,2); // Page Mode
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dest->writeField(wp,0x0,1); // switch PERSIST_LEVEL: off
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dest->writeField(wp,0x2,2); // switch TLLI : on
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dest->writeField(wp,TLLI,32); // TLLI
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dest->writeField(wp,0x0,1); // Message escape
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dest->writeField(wp,0x0,2); // CHANNEL_CODING_COMMAND
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dest->writeField(wp,0x0,1); // TLLI_BLOCK_CHANNEL_CODING
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dest->writeField(wp,0x1,1); // switch TIMING_ADVANCE_VALUE = on
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dest->writeField(wp,0x0,6); // TIMING_ADVANCE_VALUE
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dest->writeField(wp,0x0,1); // switch TIMING_ADVANCE_INDEX = off
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dest->writeField(wp,0x0,1); // Frequency Parameters = off
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dest->writeField(wp,0x1,2); // Dynamic Allocation = off
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dest->writeField(wp,0x0,1); // Dynamic Allocation
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dest->writeField(wp,0x0,1); // P0 = off
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dest->writeField(wp,0x1,1); // USF_GRANULARITY
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dest->writeField(wp,0x1,1); // switch TFI : on
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dest->writeField(wp,TFI,5);// TFI
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dest->writeField(wp,0x0,1); //
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dest->writeField(wp,0x0,1); // TBF Starting Time = off
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dest->writeField(wp,0x0,1); // Timeslot Allocation
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dest->writeField(wp,0x0,5); // USF_TN 0 - 4
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dest->writeField(wp,0x1,1); // USF_TN 5
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dest->writeField(wp,0x1,3); // USF_TN 5
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dest->writeField(wp,0x0,2); // USF_TN 6 - 7
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// dest->writeField(wp,0x0,1); // Measurement Mapping struct not present
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}
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void writeIARestOctetsDownlinkAssignment(BitVector * dest, uint8_t TFI, uint32_t TLLI)
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{
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// GMS 04.08 10.5.2.37b 10.5.2.16
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unsigned wp = 0;
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dest->writeField(wp, 3, 2); // "HH"
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dest->writeField(wp, 1, 2); // "01" Packet Downlink Assignment
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dest->writeField(wp,TLLI,32); // TLLI
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dest->writeField(wp,0x1,1); // switch TFI : on
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dest->writeField(wp,TFI,5); // TFI
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dest->writeField(wp,0x0,1); // RLC acknowledged mode
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dest->writeField(wp,0x0,1); // ALPHA = present
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//dest->writeField(wp,0x0,4); // ALPHA power control parameter
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dest->writeField(wp,0x0,5); // GAMMA power control parameter
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dest->writeField(wp,0x1,1); // Polling Bit
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dest->writeField(wp,0x1,1); // TA_VALID ???
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dest->writeField(wp,0x1,1); // switch TIMING_ADVANCE_INDEX = on
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dest->writeField(wp,0xC,4); // TIMING_ADVANCE_INDEX
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dest->writeField(wp,0x1,1); // TBF Starting TIME present
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dest->writeField(wp,0xffff,16); // TBF Starting TIME (we should set it in OpenBTS)
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dest->writeField(wp,0x0,1); // P0 not present
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}
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void writePUack(BitVector * dest, uint8_t TFI, uint32_t TLLI, unsigned CV, unsigned BSN)
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{
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// TODO We should use our implementation of encode RLC/MAC Control messages.
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unsigned wp = 0;
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dest->writeField(wp,0x1,2); // payload
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dest->writeField(wp,0x0,2); // Uplink block with TDMA framenumber
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if (CV == 0) dest->writeField(wp,0x1,1); // Suppl/Polling Bit
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else dest->writeField(wp,0x0,1); //Suppl/Polling Bit
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dest->writeField(wp,0x1,3); // Uplink state flag
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//dest->writeField(wp,0x0,1); // Reduced block sequence number
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//dest->writeField(wp,BSN+6,5); // Radio transaction identifier
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//dest->writeField(wp,0x1,1); // Final segment
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//dest->writeField(wp,0x1,1); // Address control
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//dest->writeField(wp,0x0,2); // Power reduction: 0
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//dest->writeField(wp,TFI,5); // Temporary flow identifier
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//dest->writeField(wp,0x1,1); // Direction
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dest->writeField(wp,0x09,6); // MESSAGE TYPE
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dest->writeField(wp,0x0,2); // Page Mode
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dest->writeField(wp,0x0,2);
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dest->writeField(wp,TFI,5); // Uplink TFI
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dest->writeField(wp,0x0,1);
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dest->writeField(wp,0x0,2); // CS1
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if (CV == 0) dest->writeField(wp,0x1,1); // FINAL_ACK_INDICATION
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else dest->writeField(wp,0x0,1); // FINAL_ACK_INDICATION
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dest->writeField(wp,BSN+1,7); // STARTING_SEQUENCE_NUMBER
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// RECEIVE_BLOCK_BITMAP
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for (unsigned i=0; i<8; i++) {
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dest->writeField(wp,0xff,8);
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}
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dest->writeField(wp,0x1,1); // CONTENTION_RESOLUTION_TLLI = present
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dest->writeField(wp,TLLI,8*4);
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dest->writeField(wp,0x00,4); //spare
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}
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void RLCMACExtractData(uint8_t* tfi, uint32_t* tlli, RlcMacUplinkDataBlock_t * dataBlock, uint8_t* rlc_data, unsigned* dataIndex)
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{
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unsigned blockDataLen = 0;
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unsigned dataOctetNum = 0;
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*tfi = dataBlock->TFI;
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if (dataBlock->E_1 == 0) // Extension octet follows immediately
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{
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// TODO We should implement case with several LLC PDU in one data block.
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blockDataLen = dataBlock->LENGTH_INDICATOR[0];
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}
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else
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{
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blockDataLen = 20; // RLC data length without 3 header octets.
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if(dataBlock->TI == 1) // TLLI field is present
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{
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*tlli = dataBlock->TLLI;
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blockDataLen -= 4; // TLLI length
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if (dataBlock->PI == 1) // PFI is present if TI field indicates presence of TLLI
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{
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blockDataLen -= 1; // PFI length
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}
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}
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}
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for (unsigned i = *dataIndex; i < *dataIndex + blockDataLen; i++)
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{
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rlc_data[i] = dataBlock->RLC_DATA[dataOctetNum];
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dataOctetNum++;
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}
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*dataIndex += blockDataLen;
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}
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void sendUplinkAck(uint8_t tfi, uint32_t tlli, RlcMacUplinkDataBlock_t * dataBlock)
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{
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BitVector packetUplinkAck(23*8);
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packetUplinkAck.unhex("2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b");
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writePUack(&packetUplinkAck, tfi, tlli, dataBlock->CV, dataBlock->BSN);
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COUT("RLCMAC_CONTROL_BLOCK>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>");
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RlcMacDownlink_t * pUA = (RlcMacDownlink_t *)malloc(sizeof(RlcMacUplink_t));
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decode_gsm_rlcmac_downlink(&packetUplinkAck, pUA);
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free(pUA);
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COUT("RLCMAC_CONTROL_BLOCK_END------------------------------");
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sendToOpenBTS(&packetUplinkAck);
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}
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void RLCMACDispatchDataBlock(unsigned* waitData, BitVector *vector, uint8_t* tfi, uint32_t* tlli, uint8_t* rlc_data, unsigned* dataIndex)
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{
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static DataBlockDispatcherState state = WaitSequenceStart;
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static unsigned prevBSN = -1;
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if ((*waitData == 1)&&(state == WaitNextSequence))
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{
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state = WaitSequenceStart;
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}
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COUT("RLCMAC_DATA_BLOCK<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<");
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RlcMacUplinkDataBlock_t * dataBlock = (RlcMacUplinkDataBlock_t *)malloc(sizeof(RlcMacUplinkDataBlock_t));
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decode_gsm_rlcmac_uplink_data(vector, dataBlock);
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COUT("RLCMAC_DATA_BLOCK_END------------------------------");
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switch (state) {
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case WaitSequenceStart:
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if (dataBlock->BSN == 0)
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{
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*dataIndex = 0;
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RLCMACExtractData(tfi, tlli, dataBlock, rlc_data, dataIndex);
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sendUplinkAck(*tfi, *tlli, dataBlock);
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state = WaitNextBlock;
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prevBSN = 0;
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}
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break;
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case WaitNextBlock:
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if (prevBSN == (dataBlock->BSN - 1))
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{
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RLCMACExtractData(tfi, tlli, dataBlock, rlc_data, dataIndex);
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|
||||||
sendUplinkAck(*tfi, *tlli, dataBlock);
|
|
||||||
if (dataBlock->CV == 0)
|
|
||||||
{
|
|
||||||
// Recieved last Data Block in this sequence.
|
|
||||||
sendToGSMTAP(rlc_data, *dataIndex);
|
|
||||||
state = WaitNextSequence;
|
|
||||||
prevBSN = -1;
|
|
||||||
*waitData = 0;
|
|
||||||
}
|
|
||||||
else
|
|
||||||
{
|
|
||||||
prevBSN = dataBlock->BSN;
|
|
||||||
state = WaitNextBlock;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
else
|
|
||||||
{
|
|
||||||
// Recieved Data Block with unexpected BSN.
|
|
||||||
// We should try to find nesessary Data Block.
|
|
||||||
state = WaitNextBlock;
|
|
||||||
}
|
|
||||||
break;
|
|
||||||
case WaitNextSequence:
|
|
||||||
// Now we just ignore all Data Blocks and wait next Uplink TBF
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
free(dataBlock);
|
|
||||||
}
|
|
||||||
|
|
||||||
void RLCMACDispatchControlBlock(unsigned* waitData, BitVector *vector, uint8_t* tfi, uint32_t* tlli, uint8_t* rlc_data, unsigned* dataIndex)
|
|
||||||
{
|
|
||||||
static unsigned shutUp = 0;
|
|
||||||
COUT("RLCMAC_CONTROL_BLOCK<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<");
|
|
||||||
RlcMacUplink_t * controlBlock = (RlcMacUplink_t *)malloc(sizeof(RlcMacUplink_t));
|
|
||||||
decode_gsm_rlcmac_uplink(vector, controlBlock);
|
|
||||||
COUT("RLCMAC_CONTROL_BLOCK_END------------------------------");
|
|
||||||
switch (controlBlock->u.MESSAGE_TYPE) {
|
|
||||||
case MT_PACKET_CONTROL_ACK:
|
|
||||||
if (shutUp == 0)
|
|
||||||
{
|
|
||||||
COUT("SEND IA Rest Octets Downlink Assignment>>>>>>>>>>>>>>>>>>");
|
|
||||||
BitVector IARestOctetsDownlinkAssignment(23*8);
|
|
||||||
IARestOctetsDownlinkAssignment.unhex("2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b");
|
|
||||||
writeIARestOctetsDownlinkAssignment(&IARestOctetsDownlinkAssignment, 20, *tlli);
|
|
||||||
sendToOpenBTS(&IARestOctetsDownlinkAssignment);
|
|
||||||
usleep(500000);
|
|
||||||
sendToSGSN(*tfi, *tlli, rlc_data, *dataIndex);
|
|
||||||
//sendToGSMTAP(rlc_data, *dataIndex);
|
|
||||||
shutUp = 1;
|
|
||||||
}
|
|
||||||
break;
|
|
||||||
case MT_PACKET_DOWNLINK_ACK_NACK:
|
|
||||||
COUT("SEND PacketUplinkAssignment>>>>>>>>>>>>>>>>>>");
|
|
||||||
BitVector PacketUplinkAssignment(23*8);
|
|
||||||
PacketUplinkAssignment.unhex("2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b");
|
|
||||||
writePUassignment(&PacketUplinkAssignment, 21, *tlli);
|
|
||||||
sendToOpenBTS(&PacketUplinkAssignment);
|
|
||||||
*waitData = 1;
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
free(controlBlock);
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
void RLCMACDispatchBlock(BitVector *vector)
|
|
||||||
{
|
|
||||||
static uint8_t rlc_data[60];
|
|
||||||
static uint8_t *tfi = (uint8_t *)malloc(sizeof(uint8_t));
|
|
||||||
static uint32_t *tlli = (uint32_t *)malloc(sizeof(uint32_t));
|
|
||||||
static unsigned *dataIndex = (unsigned *)malloc(sizeof(unsigned));
|
|
||||||
static unsigned waitData = 1;
|
|
||||||
|
|
||||||
unsigned readIndex = 0;
|
|
||||||
unsigned payload = vector->readField(readIndex, 2);
|
|
||||||
|
|
||||||
switch (payload) {
|
|
||||||
case RLCMAC_DATA_BLOCK:
|
|
||||||
RLCMACDispatchDataBlock(&waitData,vector, tfi, tlli, rlc_data, dataIndex);
|
|
||||||
break;
|
|
||||||
case RLCMAC_CONTROL_BLOCK:
|
|
||||||
RLCMACDispatchControlBlock(&waitData, vector, tfi, tlli, rlc_data, dataIndex);
|
|
||||||
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);
|
|
||||||
RLCMACDispatchBlock(vector);
|
|
||||||
}
|
|
||||||
}
|
|
||||||
}
|
|
49
GPRSSocket.h
49
GPRSSocket.h
|
@ -1,49 +0,0 @@
|
||||||
/*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>
|
|
||||||
#include "gsm_rlcmac.h"
|
|
||||||
|
|
||||||
|
|
||||||
enum DataBlockDispatcherState {
|
|
||||||
WaitSequenceStart,
|
|
||||||
WaitNextBlock,
|
|
||||||
WaitNextSequence
|
|
||||||
};
|
|
||||||
|
|
||||||
void sendToGSMTAP(uint8_t * data, unsigned len);
|
|
||||||
|
|
||||||
void sendToOpenBTS(BitVector * vector);
|
|
||||||
|
|
||||||
void writePUack(BitVector * dest, uint8_t TFI, uint32_t TLLI, unsigned CV, unsigned BSN);
|
|
||||||
|
|
||||||
void RLCMACExtractData(uint8_t* tfi, uint32_t* tlli, RlcMacUplinkDataBlock_t * dataBlock, uint8_t* rlc_data, unsigned* dataIndex);
|
|
||||||
|
|
||||||
void sendUplinkAck(uint8_t tfi, uint32_t tlli, RlcMacUplinkDataBlock_t * dataBlock);
|
|
||||||
|
|
||||||
void RLCMACDispatchDataBlock(BitVector *vector, uint8_t* tfi, uint32_t* tlli, uint8_t* rlc_data, unsigned* dataIndex);
|
|
||||||
|
|
||||||
void RLCMACDispatchBlock(BitVector *vector);
|
|
||||||
|
|
||||||
void *RLCMACSocket(void *);
|
|
||||||
|
|
||||||
#endif // GPRSSOCKET_H
|
|
20
Makefile.am
20
Makefile.am
|
@ -28,29 +28,31 @@ noinst_LTLIBRARIES = libgprs.la
|
||||||
libgprs_la_SOURCES = \
|
libgprs_la_SOURCES = \
|
||||||
csn1.cpp \
|
csn1.cpp \
|
||||||
gsm_rlcmac.cpp \
|
gsm_rlcmac.cpp \
|
||||||
bssgp.cpp \
|
gprs_bssgp_pcu.cpp \
|
||||||
GPRSSocket.cpp
|
gprs_rlcmac.cpp \
|
||||||
|
pcu_l1_if.cpp
|
||||||
|
|
||||||
noinst_PROGRAMS = \
|
noinst_PROGRAMS = \
|
||||||
RLCMACTest \
|
RLCMACTest \
|
||||||
RLCMAC
|
pcu
|
||||||
|
|
||||||
noinst_HEADERS = \
|
noinst_HEADERS = \
|
||||||
csn1.h \
|
csn1.h \
|
||||||
gsm_rlcmac.h \
|
gsm_rlcmac.h \
|
||||||
bssgp.h \
|
gprs_bssgp_pcu.h \
|
||||||
GPRSSocket.h
|
gprs_rlcmac.h \
|
||||||
|
pcu_l1_if.h
|
||||||
|
|
||||||
RLCMACTest_SOURCES = RLCMACTest.cpp
|
RLCMACTest_SOURCES = RLCMACTest.cpp
|
||||||
RLCMACTest_LDADD = \
|
RLCMACTest_LDADD = \
|
||||||
libgprs.la \
|
libgprs.la \
|
||||||
$(COMMON_LA)
|
$(COMMON_LA)
|
||||||
|
|
||||||
#OPENBSC_DIR = /path to OpenBSC dir
|
OPENBSC_DIR = /home/ivan/work/openbsc/openbsc/openbsc
|
||||||
#OPENGGSN_DIR = /path to OpenGGGSN dir
|
OPENGGSN_DIR = /home/ivan/work/openbsc/openggsn
|
||||||
|
|
||||||
RLCMAC_SOURCES = RLCMAC.cpp
|
pcu_SOURCES = pcu_main.cpp
|
||||||
RLCMAC_LDADD = \
|
pcu_LDADD = \
|
||||||
libgprs.la \
|
libgprs.la \
|
||||||
$(OPENBSC_DIR)/src/libgb/gprs_ns.o \
|
$(OPENBSC_DIR)/src/libgb/gprs_ns.o \
|
||||||
$(OPENBSC_DIR)/src/libgb/gprs_bssgp.o \
|
$(OPENBSC_DIR)/src/libgb/gprs_bssgp.o \
|
||||||
|
|
|
@ -1,6 +1,6 @@
|
||||||
/* bssgp.cpp
|
/* gprs_bssgp_pcu.cpp
|
||||||
*
|
*
|
||||||
* Copyright (C) 2011 Ivan Klyuchnikov
|
* Copyright (C) 2012 Ivan Klyuchnikov
|
||||||
*
|
*
|
||||||
* This program is free software; you can redistribute it and/or
|
* This program is free software; you can redistribute it and/or
|
||||||
* modify it under the terms of the GNU General Public License
|
* modify it under the terms of the GNU General Public License
|
||||||
|
@ -17,98 +17,62 @@
|
||||||
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
||||||
*/
|
*/
|
||||||
|
|
||||||
#include <arpa/inet.h>
|
#include <gprs_rlcmac.h>
|
||||||
#include <Threads.h>
|
#include <gprs_bssgp_pcu.h>
|
||||||
#include "GPRSSocket.h"
|
#include <pcu_l1_if.h>
|
||||||
#include "gsm_rlcmac.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 19
|
|
||||||
|
|
||||||
#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;
|
struct sgsn_instance *sgsn;
|
||||||
void *tall_bsc_ctx;
|
void *tall_bsc_ctx;
|
||||||
|
struct bssgp_bvc_ctx *bctx = btsctx_alloc(BVCI, NSEI);
|
||||||
|
|
||||||
// Send RLC data to OpenBTS.
|
int gprs_bssgp_pcu_rx_dl_ud(struct msgb *msg)
|
||||||
void sendRLC(uint32_t tlli, uint8_t *pdu, unsigned startIndex, unsigned endIndex, unsigned bsn, unsigned fbi)
|
|
||||||
{
|
{
|
||||||
unsigned spareLen = 0;
|
struct bssgp_ud_hdr *budh;
|
||||||
BitVector resultVector(BLOCK_LEN*8);
|
int tfi;
|
||||||
resultVector.unhex("2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b");
|
int data_index = 0;
|
||||||
RlcMacDownlinkDataBlock_t * dataBlock = (RlcMacDownlinkDataBlock_t *)malloc(sizeof(RlcMacDownlinkDataBlock_t));
|
int i = 0;
|
||||||
dataBlock->PAYLOAD_TYPE = 0;
|
int pdu_index = 0;
|
||||||
dataBlock->RRBP = 0;
|
|
||||||
dataBlock->SP = 1;
|
budh = (struct bssgp_ud_hdr *)msgb_bssgph(msg);
|
||||||
dataBlock->USF = 1;
|
struct gprs_rlcmac_tbf *tbf;
|
||||||
dataBlock->PR = 0;
|
// Create new TBF
|
||||||
dataBlock->TFI = 20;
|
tfi = tfi_alloc();
|
||||||
dataBlock->FBI = fbi;
|
if (tfi < 0) {
|
||||||
dataBlock->BSN = bsn;
|
return tfi;
|
||||||
if ((endIndex-startIndex) < 20)
|
|
||||||
{
|
|
||||||
dataBlock->E_1 = 0;
|
|
||||||
dataBlock->LENGTH_INDICATOR[0] = endIndex-startIndex;
|
|
||||||
dataBlock->M[0] = 0;
|
|
||||||
dataBlock->E[0] = 1;
|
|
||||||
spareLen = 19 - dataBlock->LENGTH_INDICATOR[0];
|
|
||||||
}
|
}
|
||||||
else
|
tbf = tbf_alloc(tfi);
|
||||||
|
tbf->direction = GPRS_RLCMAC_DL_TBF;
|
||||||
|
tbf->state = GPRS_RLCMAC_WAIT_DATA_SEQ_START;
|
||||||
|
tbf->tlli = ntohl(budh->tlli);
|
||||||
|
|
||||||
|
LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP TLLI=0x%08x \n", ntohl(budh->tlli));
|
||||||
|
for (i = 4; i < MAX_LEN_PDU; i++)
|
||||||
{
|
{
|
||||||
dataBlock->E_1 = 1;
|
//LOGP(DBSSGP, LOGL_NOTICE, "SERCH data = -0x%02x\n", budh ->data[i]);
|
||||||
|
if(budh->data[i] == IE_PDU)
|
||||||
|
{
|
||||||
|
pdu_index = i + 2;
|
||||||
|
break;
|
||||||
|
}
|
||||||
}
|
}
|
||||||
unsigned j = 0;
|
for (i = pdu_index; i < pdu_index + (budh->data[pdu_index-1]&0x7f); i++)
|
||||||
for(unsigned i = startIndex; i < endIndex; i++)
|
|
||||||
{
|
{
|
||||||
dataBlock->RLC_DATA[j] = pdu[i];
|
//LOGP(DBSSGP, LOGL_NOTICE, "-0x%02x\n", budh ->data[i]);
|
||||||
j++;
|
tbf->rlc_data[data_index] = budh->data[i];
|
||||||
|
data_index++;
|
||||||
}
|
}
|
||||||
for(unsigned i = j; i < j + spareLen; i++)
|
DEBUGP(DBSSGP, "BSSGP Catch from SGSN=%u octets. Send it to OpenBTS.\n", data_index);
|
||||||
{
|
gsmtap_send_llc(tbf->rlc_data,data_index);
|
||||||
dataBlock->RLC_DATA[i] = 0x2b;
|
tbf->data_index = data_index;
|
||||||
}
|
gprs_rlcmac_segment_llc_pdu(tbf);
|
||||||
encode_gsm_rlcmac_downlink_data(&resultVector, dataBlock);
|
|
||||||
free(dataBlock);
|
|
||||||
sendToOpenBTS(&resultVector);
|
|
||||||
}
|
}
|
||||||
|
|
||||||
/* Receive a BSSGP PDU from a BSS on a PTP BVCI */
|
/* 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)
|
int gprs_bssgp_pcu_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);
|
struct bssgp_normal_hdr *bgph = (struct bssgp_normal_hdr *) msgb_bssgph(msg);
|
||||||
uint8_t pdu_type = bgph->pdu_type;
|
uint8_t pdu_type = bgph->pdu_type;
|
||||||
uint8_t pdu[MAX_LEN_PDU];
|
|
||||||
unsigned rc = 0;
|
unsigned rc = 0;
|
||||||
unsigned dataIndex = 0;
|
|
||||||
unsigned numBlocks = 0;
|
|
||||||
unsigned i = 0;
|
|
||||||
unsigned j = 0;
|
|
||||||
unsigned pduIndex = 0;
|
|
||||||
unsigned fbi = 0;
|
|
||||||
struct bssgp_ud_hdr *budh;
|
|
||||||
|
|
||||||
/* If traffic is received on a BVC that is marked as blocked, the
|
/* 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:
|
* received PDU shall not be accepted and a STATUS PDU (Cause value:
|
||||||
|
@ -123,55 +87,7 @@ int gprs_bssgp_bss_rx_ptp(struct msgb *msg, struct tlv_parsed *tp, struct bssgp_
|
||||||
switch (pdu_type) {
|
switch (pdu_type) {
|
||||||
case BSSGP_PDUT_DL_UNITDATA:
|
case BSSGP_PDUT_DL_UNITDATA:
|
||||||
LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP_PDUT_DL_UNITDATA\n");
|
LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP_PDUT_DL_UNITDATA\n");
|
||||||
budh = (struct bssgp_ud_hdr *) msgb_bssgph(msg);
|
gprs_bssgp_pcu_rx_dl_ud(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);
|
|
||||||
sendToGSMTAP(pdu,dataIndex);
|
|
||||||
if (dataIndex > BLOCK_DATA_LEN + 1)
|
|
||||||
{
|
|
||||||
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)
|
|
||||||
{
|
|
||||||
if (ost > 0)
|
|
||||||
{
|
|
||||||
blockDataLen = ost;
|
|
||||||
}
|
|
||||||
fbi = 1;
|
|
||||||
}
|
|
||||||
endIndex = startIndex + blockDataLen;
|
|
||||||
sendRLC(ntohl(budh->tlli), pdu, startIndex, endIndex, i, fbi);
|
|
||||||
startIndex += blockDataLen;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
else
|
|
||||||
{
|
|
||||||
sendRLC(ntohl(budh->tlli), pdu, 0, dataIndex, 0, 1);
|
|
||||||
}
|
|
||||||
break;
|
break;
|
||||||
case BSSGP_PDUT_PAGING_PS:
|
case BSSGP_PDUT_PAGING_PS:
|
||||||
LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP_PDUT_PAGING_PS\n");
|
LOGP(DBSSGP, LOGL_NOTICE, "rx BSSGP_PDUT_PAGING_PS\n");
|
||||||
|
@ -197,7 +113,7 @@ int gprs_bssgp_bss_rx_ptp(struct msgb *msg, struct tlv_parsed *tp, struct bssgp_
|
||||||
}
|
}
|
||||||
|
|
||||||
/* Receive a BSSGP PDU from a SGSN on a SIGNALLING BVCI */
|
/* 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)
|
int gprs_bssgp_pcu_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);
|
struct bssgp_normal_hdr *bgph = (struct bssgp_normal_hdr *) msgb_bssgph(msg);
|
||||||
int rc = 0;
|
int rc = 0;
|
||||||
|
@ -248,7 +164,7 @@ int gprs_bssgp_bss_rx_sign(struct msgb *msg, struct tlv_parsed *tp, struct bssgp
|
||||||
return rc;
|
return rc;
|
||||||
}
|
}
|
||||||
|
|
||||||
int gprs_bssgp_bss_rcvmsg(struct msgb *msg)
|
int gprs_bssgp_pcu_rcvmsg(struct msgb *msg)
|
||||||
{
|
{
|
||||||
struct bssgp_normal_hdr *bgph = (struct bssgp_normal_hdr *) msgb_bssgph(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 bssgp_ud_hdr *budh = (struct bssgp_ud_hdr *) msgb_bssgph(msg);
|
||||||
|
@ -299,7 +215,7 @@ int gprs_bssgp_bss_rcvmsg(struct msgb *msg)
|
||||||
if (ns_bvci == BVCI_SIGNALLING)
|
if (ns_bvci == BVCI_SIGNALLING)
|
||||||
{
|
{
|
||||||
LOGP(DBSSGP, LOGL_NOTICE, "rx BVCI_SIGNALLING gprs_bssgp_rx_sign\n");
|
LOGP(DBSSGP, LOGL_NOTICE, "rx BVCI_SIGNALLING gprs_bssgp_rx_sign\n");
|
||||||
rc = gprs_bssgp_bss_rx_sign(msg, &tp, bctx);
|
rc = gprs_bssgp_pcu_rx_sign(msg, &tp, bctx);
|
||||||
}
|
}
|
||||||
else if (ns_bvci == BVCI_PTM)
|
else if (ns_bvci == BVCI_PTM)
|
||||||
{
|
{
|
||||||
|
@ -309,94 +225,7 @@ int gprs_bssgp_bss_rcvmsg(struct msgb *msg)
|
||||||
else
|
else
|
||||||
{
|
{
|
||||||
LOGP(DBSSGP, LOGL_NOTICE, "rx BVCI_PTP gprs_bssgp_rx_ptp\n");
|
LOGP(DBSSGP, LOGL_NOTICE, "rx BVCI_PTP gprs_bssgp_rx_ptp\n");
|
||||||
rc = gprs_bssgp_bss_rx_ptp(msg, &tp, bctx);
|
rc = gprs_bssgp_pcu_rx_ptp(msg, &tp, bctx);
|
||||||
}
|
}
|
||||||
return rc;
|
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, bvci, cause);
|
|
||||||
}
|
|
||||||
i++;
|
|
||||||
}
|
|
||||||
}
|
|
|
@ -1,6 +1,6 @@
|
||||||
/* bssgp.h
|
/* gprs_bssgp_pcu.h
|
||||||
*
|
*
|
||||||
* Copyright (C) 2011 Ivan Klyuchnikov
|
* Copyright (C) 2012 Ivan Klyuchnikov
|
||||||
*
|
*
|
||||||
* This program is free software; you can redistribute it and/or
|
* This program is free software; you can redistribute it and/or
|
||||||
* modify it under the terms of the GNU General Public License
|
* modify it under the terms of the GNU General Public License
|
||||||
|
@ -16,9 +16,10 @@
|
||||||
* along with this program; if not, write to the Free Software
|
* along with this program; if not, write to the Free Software
|
||||||
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
||||||
*/
|
*/
|
||||||
|
|
||||||
#ifndef BSSGP_H
|
#ifndef GPRS_BSSGP_PCU_H
|
||||||
#define BSSGP_H
|
#define GPRS_BSSGP_PCU_H
|
||||||
|
|
||||||
|
|
||||||
extern "C" {
|
extern "C" {
|
||||||
#include <osmocom/core/talloc.h>
|
#include <osmocom/core/talloc.h>
|
||||||
|
@ -36,18 +37,32 @@ int bssgp_tx_ul_ud(struct bssgp_bvc_ctx *bctx, uint32_t tlli, const uint8_t *qos
|
||||||
struct bssgp_bvc_ctx *btsctx_alloc(uint16_t bvci, uint16_t nsei);
|
struct bssgp_bvc_ctx *btsctx_alloc(uint16_t bvci, uint16_t nsei);
|
||||||
}
|
}
|
||||||
|
|
||||||
void sendRLC(uint32_t tlli, uint8_t *pdu, unsigned startIndex, unsigned endIndex, unsigned bsn);
|
#define BVCI 7
|
||||||
|
#define NSEI 3
|
||||||
|
|
||||||
int gprs_bssgp_bss_rx_ptp(struct msgb *msg, struct tlv_parsed *tp, struct bssgp_bvc_ctx *bctx);
|
#define QOS_PROFILE 0
|
||||||
|
#define BSSGP_HDR_LEN 20
|
||||||
|
#define NS_HDR_LEN 4
|
||||||
|
#define MAX_LEN_PDU 60
|
||||||
|
#define IE_PDU 14
|
||||||
|
#define BLOCK_DATA_LEN 19
|
||||||
|
#define BLOCK_LEN 23
|
||||||
|
|
||||||
int gprs_bssgp_bss_rx_sign(struct msgb *msg, struct tlv_parsed *tp, struct bssgp_bvc_ctx *bctx);
|
#define CELL_ID 3
|
||||||
|
#define MNC 55
|
||||||
|
#define MCC 905
|
||||||
|
#define PCU_LAC 1000
|
||||||
|
#define PCU_RAC 1
|
||||||
|
|
||||||
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);
|
extern struct bssgp_bvc_ctx *bctx;
|
||||||
|
|
||||||
void sendToSGSN(uint8_t tfi, uint32_t tlli, uint8_t * rlc_data, unsigned dataLen);
|
int gprs_bssgp_pcu_rx_dl_ud(struct msgb *msg);
|
||||||
|
|
||||||
void RLCMACServer();
|
int gprs_bssgp_pcu_rx_ptp(struct msgb *msg, struct tlv_parsed *tp, struct bssgp_bvc_ctx *bctx);
|
||||||
|
|
||||||
#endif // BSSGP_H
|
int gprs_bssgp_pcu_rx_sign(struct msgb *msg, struct tlv_parsed *tp, struct bssgp_bvc_ctx *bctx);
|
||||||
|
|
||||||
|
int gprs_bssgp_pcu_rcvmsg(struct msgb *msg);
|
||||||
|
|
||||||
|
#endif // GPRS_BSSGP_PCU_H
|
|
@ -0,0 +1,527 @@
|
||||||
|
/* gprs_rlcmac.cpp
|
||||||
|
*
|
||||||
|
* Copyright (C) 2012 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 <gprs_bssgp_pcu.h>
|
||||||
|
#include <pcu_l1_if.h>
|
||||||
|
#include <Threads.h>
|
||||||
|
#include <gprs_rlcmac.h>
|
||||||
|
|
||||||
|
|
||||||
|
LLIST_HEAD(gprs_rlcmac_tbfs);
|
||||||
|
void *rlcmac_tall_ctx;
|
||||||
|
|
||||||
|
int tfi_alloc()
|
||||||
|
{
|
||||||
|
struct gprs_rlcmac_tbf *tbf;
|
||||||
|
uint32_t tfi_map = 0;
|
||||||
|
uint32_t tfi_ind = 0;
|
||||||
|
uint32_t mask = 1;
|
||||||
|
uint8_t i;
|
||||||
|
|
||||||
|
llist_for_each_entry(tbf, &gprs_rlcmac_tbfs, list) {
|
||||||
|
tfi_ind = 1 << tbf->tfi;
|
||||||
|
tfi_map = tfi_map|tfi_ind;
|
||||||
|
}
|
||||||
|
|
||||||
|
for (i = 0; i < 32; i++) {
|
||||||
|
if(((tfi_map >> i) & mask) == 0) {
|
||||||
|
return i;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* lookup TBF Entity (by TFI) */
|
||||||
|
static struct gprs_rlcmac_tbf *tbf_by_tfi(uint8_t tfi)
|
||||||
|
{
|
||||||
|
struct gprs_rlcmac_tbf *tbf;
|
||||||
|
|
||||||
|
llist_for_each_entry(tbf, &gprs_rlcmac_tbfs, list) {
|
||||||
|
if (tbf->tfi == tfi)
|
||||||
|
return tbf;
|
||||||
|
}
|
||||||
|
return NULL;
|
||||||
|
}
|
||||||
|
|
||||||
|
static struct gprs_rlcmac_tbf *tbf_by_tlli(uint8_t tlli)
|
||||||
|
{
|
||||||
|
struct gprs_rlcmac_tbf *tbf;
|
||||||
|
|
||||||
|
llist_for_each_entry(tbf, &gprs_rlcmac_tbfs, list) {
|
||||||
|
if ((tbf->tlli == tlli)&&(tbf->direction == GPRS_RLCMAC_UL_TBF))
|
||||||
|
return tbf;
|
||||||
|
}
|
||||||
|
return NULL;
|
||||||
|
}
|
||||||
|
|
||||||
|
struct gprs_rlcmac_tbf *tbf_alloc(uint8_t tfi)
|
||||||
|
{
|
||||||
|
struct gprs_rlcmac_tbf *tbf;
|
||||||
|
|
||||||
|
tbf = talloc_zero(rlcmac_tall_ctx, struct gprs_rlcmac_tbf);
|
||||||
|
if (!tbf)
|
||||||
|
return NULL;
|
||||||
|
|
||||||
|
tbf->tfi = tfi;
|
||||||
|
|
||||||
|
llist_add(&tbf->list, &gprs_rlcmac_tbfs);
|
||||||
|
|
||||||
|
return tbf;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void tbf_free(struct gprs_rlcmac_tbf *tbf)
|
||||||
|
{
|
||||||
|
llist_del(&tbf->list);
|
||||||
|
talloc_free(tbf);
|
||||||
|
}
|
||||||
|
|
||||||
|
void write_packet_downlink_assignment(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,tfi,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 write_packet_uplink_assignment(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,0xa,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); // CHANNEL_CODING_COMMAND
|
||||||
|
dest->writeField(wp,0x0,1); // TLLI_BLOCK_CHANNEL_CODING
|
||||||
|
|
||||||
|
dest->writeField(wp,0x1,1); // switch TIMING_ADVANCE_VALUE = on
|
||||||
|
dest->writeField(wp,0x0,6); // TIMING_ADVANCE_VALUE
|
||||||
|
dest->writeField(wp,0x0,1); // switch TIMING_ADVANCE_INDEX = off
|
||||||
|
|
||||||
|
dest->writeField(wp,0x0,1); // Frequency Parameters = off
|
||||||
|
|
||||||
|
dest->writeField(wp,0x1,2); // Dynamic Allocation = off
|
||||||
|
|
||||||
|
dest->writeField(wp,0x0,1); // Dynamic Allocation
|
||||||
|
dest->writeField(wp,0x0,1); // P0 = off
|
||||||
|
|
||||||
|
dest->writeField(wp,0x1,1); // USF_GRANULARITY
|
||||||
|
dest->writeField(wp,0x1,1); // switch TFI : on
|
||||||
|
dest->writeField(wp,tfi,5);// TFI
|
||||||
|
|
||||||
|
dest->writeField(wp,0x0,1); //
|
||||||
|
dest->writeField(wp,0x0,1); // TBF Starting Time = off
|
||||||
|
dest->writeField(wp,0x0,1); // Timeslot Allocation
|
||||||
|
|
||||||
|
dest->writeField(wp,0x0,5); // USF_TN 0 - 4
|
||||||
|
dest->writeField(wp,0x1,1); // USF_TN 5
|
||||||
|
dest->writeField(wp,0x1,3); // USF_TN 5
|
||||||
|
dest->writeField(wp,0x0,2); // USF_TN 6 - 7
|
||||||
|
// dest->writeField(wp,0x0,1); // Measurement Mapping struct not present
|
||||||
|
}
|
||||||
|
|
||||||
|
void write_ia_rest_octets_downlink_assignment(BitVector * dest, uint8_t tfi, uint32_t tlli)
|
||||||
|
{
|
||||||
|
// GMS 04.08 10.5.2.37b 10.5.2.16
|
||||||
|
unsigned wp = 0;
|
||||||
|
dest->writeField(wp, 3, 2); // "HH"
|
||||||
|
dest->writeField(wp, 1, 2); // "01" Packet Downlink Assignment
|
||||||
|
dest->writeField(wp,tlli,32); // TLLI
|
||||||
|
dest->writeField(wp,0x1,1); // switch TFI : on
|
||||||
|
dest->writeField(wp,tfi,5); // TFI
|
||||||
|
dest->writeField(wp,0x0,1); // RLC acknowledged mode
|
||||||
|
dest->writeField(wp,0x0,1); // ALPHA = present
|
||||||
|
//dest->writeField(wp,0x0,4); // ALPHA power control parameter
|
||||||
|
dest->writeField(wp,0x0,5); // GAMMA power control parameter
|
||||||
|
dest->writeField(wp,0x1,1); // Polling Bit
|
||||||
|
dest->writeField(wp,0x1,1); // TA_VALID ???
|
||||||
|
dest->writeField(wp,0x1,1); // switch TIMING_ADVANCE_INDEX = on
|
||||||
|
dest->writeField(wp,0xC,4); // TIMING_ADVANCE_INDEX
|
||||||
|
dest->writeField(wp,0x1,1); // TBF Starting TIME present
|
||||||
|
dest->writeField(wp,0xffff,16); // TBF Starting TIME (we should set it in OpenBTS)
|
||||||
|
dest->writeField(wp,0x0,1); // P0 not present
|
||||||
|
}
|
||||||
|
|
||||||
|
void write_packet_uplink_ack(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 gprs_rlcmac_tx_ul_ack(uint8_t tfi, uint32_t tlli, RlcMacUplinkDataBlock_t * ul_data_block)
|
||||||
|
{
|
||||||
|
BitVector packet_uplink_ack_vec(23*8);
|
||||||
|
packet_uplink_ack_vec.unhex("2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b");
|
||||||
|
write_packet_uplink_ack(&packet_uplink_ack_vec, tfi, tlli, ul_data_block->CV, ul_data_block->BSN);
|
||||||
|
COUT("RLCMAC_CONTROL_BLOCK>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>");
|
||||||
|
RlcMacDownlink_t * packet_uplink_ack = (RlcMacDownlink_t *)malloc(sizeof(RlcMacUplink_t));
|
||||||
|
decode_gsm_rlcmac_downlink(&packet_uplink_ack_vec, packet_uplink_ack);
|
||||||
|
free(packet_uplink_ack);
|
||||||
|
COUT("RLCMAC_CONTROL_BLOCK_END------------------------------");
|
||||||
|
pcu_l1if_tx(&packet_uplink_ack_vec);
|
||||||
|
}
|
||||||
|
|
||||||
|
void gprs_rlcmac_data_block_parse(gprs_rlcmac_tbf* tbf, RlcMacUplinkDataBlock_t * ul_data_block)
|
||||||
|
{
|
||||||
|
unsigned block_data_len = 0;
|
||||||
|
unsigned data_octet_num = 0;
|
||||||
|
|
||||||
|
if (ul_data_block->E_1 == 0) // Extension octet follows immediately
|
||||||
|
{
|
||||||
|
// TODO We should implement case with several LLC PDU in one data block.
|
||||||
|
block_data_len = ul_data_block->LENGTH_INDICATOR[0];
|
||||||
|
}
|
||||||
|
else
|
||||||
|
{
|
||||||
|
block_data_len = 20; // RLC data length without 3 header octets.
|
||||||
|
if(ul_data_block->TI == 1) // TLLI field is present
|
||||||
|
{
|
||||||
|
tbf->tlli = ul_data_block->TLLI;
|
||||||
|
block_data_len -= 4; // TLLI length
|
||||||
|
if (ul_data_block->PI == 1) // PFI is present if TI field indicates presence of TLLI
|
||||||
|
{
|
||||||
|
block_data_len -= 1; // PFI length
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
for (unsigned i = tbf->data_index; i < tbf->data_index + block_data_len; i++)
|
||||||
|
{
|
||||||
|
tbf->rlc_data[i] = ul_data_block->RLC_DATA[data_octet_num];
|
||||||
|
data_octet_num++;
|
||||||
|
}
|
||||||
|
tbf->data_index += block_data_len;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Received Uplink RLC data block. */
|
||||||
|
int gprs_rlcmac_rcv_data_block(BitVector *rlc_block)
|
||||||
|
{
|
||||||
|
struct gprs_rlcmac_tbf *tbf;
|
||||||
|
|
||||||
|
COUT("RLCMAC_DATA_BLOCK<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<");
|
||||||
|
RlcMacUplinkDataBlock_t * ul_data_block = (RlcMacUplinkDataBlock_t *)malloc(sizeof(RlcMacUplinkDataBlock_t));
|
||||||
|
decode_gsm_rlcmac_uplink_data(rlc_block, ul_data_block);
|
||||||
|
COUT("RLCMAC_DATA_BLOCK_END------------------------------");
|
||||||
|
|
||||||
|
tbf = tbf_by_tfi(ul_data_block->TFI);
|
||||||
|
if (!tbf) {
|
||||||
|
tbf = tbf_alloc(ul_data_block->TFI);
|
||||||
|
if (tbf) {
|
||||||
|
tbf->direction = GPRS_RLCMAC_UL_TBF;
|
||||||
|
tbf->state = GPRS_RLCMAC_WAIT_DATA_SEQ_START;
|
||||||
|
} else {
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
switch (tbf->state) {
|
||||||
|
case GPRS_RLCMAC_WAIT_DATA_SEQ_START:
|
||||||
|
if (ul_data_block->BSN == 0) {
|
||||||
|
tbf->data_index = 0;
|
||||||
|
gprs_rlcmac_data_block_parse(tbf, ul_data_block);
|
||||||
|
gprs_rlcmac_tx_ul_ack(tbf->tfi, tbf->tlli, ul_data_block);
|
||||||
|
tbf->state = GPRS_RLCMAC_WAIT_NEXT_DATA_BLOCK;
|
||||||
|
tbf->bsn = ul_data_block->BSN;
|
||||||
|
}
|
||||||
|
break;
|
||||||
|
case GPRS_RLCMAC_WAIT_NEXT_DATA_BLOCK:
|
||||||
|
if (tbf->bsn == (ul_data_block->BSN - 1)) {
|
||||||
|
gprs_rlcmac_data_block_parse(tbf, ul_data_block);
|
||||||
|
gprs_rlcmac_tx_ul_ack(tbf->tfi, tbf->tlli, ul_data_block);
|
||||||
|
if (ul_data_block->CV == 0) {
|
||||||
|
// Recieved last Data Block in this sequence.
|
||||||
|
gsmtap_send_llc(tbf->rlc_data, tbf->data_index);
|
||||||
|
tbf->state = GPRS_RLCMAC_WAIT_NEXT_DATA_SEQ;
|
||||||
|
} else {
|
||||||
|
tbf->bsn = ul_data_block->BSN;
|
||||||
|
tbf->state = GPRS_RLCMAC_WAIT_NEXT_DATA_BLOCK;
|
||||||
|
}
|
||||||
|
} else {
|
||||||
|
// Recieved Data Block with unexpected BSN.
|
||||||
|
// We should try to find nesessary Data Block.
|
||||||
|
tbf->state = GPRS_RLCMAC_WAIT_NEXT_DATA_BLOCK;
|
||||||
|
}
|
||||||
|
break;
|
||||||
|
case GPRS_RLCMAC_WAIT_NEXT_DATA_SEQ:
|
||||||
|
// Now we just ignore all Data Blocks and wait next Uplink TBF
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
|
||||||
|
free(ul_data_block);
|
||||||
|
return 1;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Received Uplink RLC control block. */
|
||||||
|
int gprs_rlcmac_rcv_control_block(BitVector *rlc_block)
|
||||||
|
{
|
||||||
|
//static unsigned shutUp = 0;
|
||||||
|
uint8_t tfi = 0;
|
||||||
|
uint32_t tlli = 0;
|
||||||
|
struct gprs_rlcmac_tbf *tbf;
|
||||||
|
|
||||||
|
COUT("RLCMAC_CONTROL_BLOCK<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<");
|
||||||
|
RlcMacUplink_t * ul_control_block = (RlcMacUplink_t *)malloc(sizeof(RlcMacUplink_t));
|
||||||
|
decode_gsm_rlcmac_uplink(rlc_block, ul_control_block);
|
||||||
|
COUT("RLCMAC_CONTROL_BLOCK_END------------------------------");
|
||||||
|
|
||||||
|
//gprs_rlcmac_control_block_get_tfi_tlli(ul_control_block, &tfi, &tlli);
|
||||||
|
tbf = tbf_by_tfi(tfi);
|
||||||
|
if (!tbf) {
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
switch (ul_control_block->u.MESSAGE_TYPE) {
|
||||||
|
case MT_PACKET_CONTROL_ACK:
|
||||||
|
/*
|
||||||
|
COUT("SEND IA Rest Octets Downlink Assignment>>>>>>>>>>>>>>>>>>");
|
||||||
|
BitVector IARestOctetsDownlinkAssignment(23*8);
|
||||||
|
IARestOctetsDownlinkAssignment.unhex("2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b");
|
||||||
|
writeIARestOctetsDownlinkAssignment(&IARestOctetsDownlinkAssignment, 20, *tlli);
|
||||||
|
sendToOpenBTS(&IARestOctetsDownlinkAssignment);
|
||||||
|
*/
|
||||||
|
//usleep(500000);
|
||||||
|
tlli = ul_control_block->u.Packet_Control_Acknowledgement.TLLI;
|
||||||
|
tbf = tbf_by_tlli(tlli);
|
||||||
|
if (!tbf) {
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
gprs_rlcmac_tx_ul_ud(tbf);
|
||||||
|
tbf_free(tbf);
|
||||||
|
break;
|
||||||
|
case MT_PACKET_DOWNLINK_ACK_NACK:
|
||||||
|
tfi = ul_control_block->u.Packet_Downlink_Ack_Nack.DOWNLINK_TFI;
|
||||||
|
tbf = tbf_by_tfi(tfi);
|
||||||
|
if (!tbf) {
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
//COUT("SEND PacketUplinkAssignment>>>>>>>>>>>>>>>>>>");
|
||||||
|
//BitVector PacketUplinkAssignment(23*8);
|
||||||
|
//PacketUplinkAssignment.unhex("2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b");
|
||||||
|
//writePUassignment(&PacketUplinkAssignment, tbf->tfi, tbf->tlli);
|
||||||
|
//sendToOpenBTS(&PacketUplinkAssignment);
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
free(ul_control_block);
|
||||||
|
return 1;
|
||||||
|
}
|
||||||
|
|
||||||
|
void gprs_rlcmac_rcv_block(BitVector *rlc_block)
|
||||||
|
{
|
||||||
|
unsigned readIndex = 0;
|
||||||
|
unsigned payload = rlc_block->readField(readIndex, 2);
|
||||||
|
|
||||||
|
switch (payload) {
|
||||||
|
case GPRS_RLCMAC_DATA_BLOCK:
|
||||||
|
gprs_rlcmac_rcv_data_block(rlc_block);
|
||||||
|
break;
|
||||||
|
case GPRS_RLCMAC_CONTROL_BLOCK:
|
||||||
|
gprs_rlcmac_rcv_control_block(rlc_block);
|
||||||
|
break;
|
||||||
|
case GPRS_RLCMAC_CONTROL_BLOCK_OPT:
|
||||||
|
COUT("GPRS_RLCMAC_CONTROL_BLOCK_OPT block payload is not supported.\n");
|
||||||
|
default:
|
||||||
|
COUT("Unknown RLCMAC block payload.\n");
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// Send RLC data to OpenBTS.
|
||||||
|
void gprs_rlcmac_tx_dl_data_block(uint32_t tlli, uint8_t *pdu, int start_index, int end_index, uint8_t bsn, uint8_t fbi)
|
||||||
|
{
|
||||||
|
int spare_len = 0;
|
||||||
|
BitVector data_block_vector(BLOCK_LEN*8);
|
||||||
|
data_block_vector.unhex("2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b");
|
||||||
|
RlcMacDownlinkDataBlock_t * data_block = (RlcMacDownlinkDataBlock_t *)malloc(sizeof(RlcMacDownlinkDataBlock_t));
|
||||||
|
data_block->PAYLOAD_TYPE = 0;
|
||||||
|
data_block->RRBP = 0;
|
||||||
|
data_block->SP = 1;
|
||||||
|
data_block->USF = 1;
|
||||||
|
data_block->PR = 0;
|
||||||
|
data_block->TFI = 20;
|
||||||
|
data_block->FBI = fbi;
|
||||||
|
data_block->BSN = bsn;
|
||||||
|
if ((end_index - start_index) < 20) {
|
||||||
|
data_block->E_1 = 0;
|
||||||
|
data_block->LENGTH_INDICATOR[0] = end_index-start_index;
|
||||||
|
data_block->M[0] = 0;
|
||||||
|
data_block->E[0] = 1;
|
||||||
|
spare_len = 19 - data_block->LENGTH_INDICATOR[0];
|
||||||
|
} else {
|
||||||
|
data_block->E_1 = 1;
|
||||||
|
}
|
||||||
|
int j = 0;
|
||||||
|
int i = 0;
|
||||||
|
for(i = start_index; i < end_index; i++) {
|
||||||
|
data_block->RLC_DATA[j] = pdu[i];
|
||||||
|
j++;
|
||||||
|
}
|
||||||
|
|
||||||
|
for(i = j; i < j + spare_len; i++) {
|
||||||
|
data_block->RLC_DATA[i] = 0x2b;
|
||||||
|
}
|
||||||
|
encode_gsm_rlcmac_downlink_data(&data_block_vector, data_block);
|
||||||
|
free(data_block);
|
||||||
|
pcu_l1if_tx(&data_block_vector);
|
||||||
|
}
|
||||||
|
|
||||||
|
int gprs_rlcmac_segment_llc_pdu(struct gprs_rlcmac_tbf *tbf)
|
||||||
|
{
|
||||||
|
int fbi = 0;
|
||||||
|
int num_blocks = 0;
|
||||||
|
int i;
|
||||||
|
|
||||||
|
if (tbf->data_index > BLOCK_DATA_LEN + 1)
|
||||||
|
{
|
||||||
|
int block_data_len = BLOCK_DATA_LEN;
|
||||||
|
num_blocks = tbf->data_index/BLOCK_DATA_LEN;
|
||||||
|
int rest_len = tbf->data_index%BLOCK_DATA_LEN;
|
||||||
|
int start_index = 0;
|
||||||
|
int end_index = 0;
|
||||||
|
if (tbf->data_index%BLOCK_DATA_LEN > 0)
|
||||||
|
{
|
||||||
|
num_blocks++;
|
||||||
|
}
|
||||||
|
for (i = 0; i < num_blocks; i++)
|
||||||
|
{
|
||||||
|
if (i == num_blocks-1)
|
||||||
|
{
|
||||||
|
if (rest_len > 0)
|
||||||
|
{
|
||||||
|
block_data_len = rest_len;
|
||||||
|
}
|
||||||
|
fbi = 1;
|
||||||
|
}
|
||||||
|
end_index = start_index + block_data_len;
|
||||||
|
gprs_rlcmac_tx_dl_data_block(tbf->tlli, tbf->rlc_data, start_index, end_index, i, fbi);
|
||||||
|
start_index += block_data_len;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
else
|
||||||
|
{
|
||||||
|
gprs_rlcmac_tx_dl_data_block(tbf->tlli, tbf->rlc_data, 0, tbf->data_index, 0, 1);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Send Uplink unit-data to SGSN. */
|
||||||
|
void gprs_rlcmac_tx_ul_ud(gprs_rlcmac_tbf *tbf)
|
||||||
|
{
|
||||||
|
const uint8_t qos_profile = QOS_PROFILE;
|
||||||
|
struct msgb *llc_pdu;
|
||||||
|
unsigned msg_len = NS_HDR_LEN + BSSGP_HDR_LEN + tbf->data_index;
|
||||||
|
|
||||||
|
LOGP(DBSSGP, LOGL_DEBUG, "Data len %u TLLI 0x%08x , TFI 0x%02x", tbf->data_index, tbf->tlli, tbf->tfi);
|
||||||
|
//for (unsigned i = 0; i < dataLen; i++)
|
||||||
|
// LOGP(DBSSGP, LOGL_DEBUG, " Data[%u] = %u", i, rlc_data[i]);
|
||||||
|
|
||||||
|
llc_pdu = msgb_alloc_headroom(msg_len, msg_len,"llc_pdu");
|
||||||
|
msgb_tvlv_push(llc_pdu, BSSGP_IE_LLC_PDU, sizeof(uint8_t)*tbf->data_index, tbf->rlc_data);
|
||||||
|
bssgp_tx_ul_ud(bctx, tbf->tlli, &qos_profile, llc_pdu);
|
||||||
|
}
|
||||||
|
|
|
@ -0,0 +1,88 @@
|
||||||
|
/* gprs_rlcmac.h
|
||||||
|
*
|
||||||
|
* Copyright (C) 2012 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 GPRS_RLCMAC_H
|
||||||
|
#define GPRS_RLCMAC_H
|
||||||
|
|
||||||
|
#include <BitVector.h>
|
||||||
|
#include <gsm_rlcmac.h>
|
||||||
|
|
||||||
|
extern "C" {
|
||||||
|
#include <osmocom/core/linuxlist.h>
|
||||||
|
}
|
||||||
|
|
||||||
|
enum gprs_rlcmac_tbf_state {
|
||||||
|
GPRS_RLCMAC_WAIT_DATA_SEQ_START,
|
||||||
|
GPRS_RLCMAC_WAIT_NEXT_DATA_BLOCK,
|
||||||
|
GPRS_RLCMAC_WAIT_NEXT_DATA_SEQ
|
||||||
|
};
|
||||||
|
|
||||||
|
enum gprs_rlcmac_tbf_direction {
|
||||||
|
GPRS_RLCMAC_DL_TBF,
|
||||||
|
GPRS_RLCMAC_UL_TBF
|
||||||
|
};
|
||||||
|
|
||||||
|
struct gprs_rlcmac_tbf {
|
||||||
|
struct llist_head list;
|
||||||
|
enum gprs_rlcmac_tbf_state state;
|
||||||
|
enum gprs_rlcmac_tbf_direction direction;
|
||||||
|
uint8_t tfi;
|
||||||
|
uint32_t tlli;
|
||||||
|
uint8_t rlc_data[60];
|
||||||
|
uint16_t data_index;
|
||||||
|
uint8_t bsn;
|
||||||
|
};
|
||||||
|
|
||||||
|
extern struct llist_head gprs_rlcmac_tbfs;
|
||||||
|
|
||||||
|
int tfi_alloc();
|
||||||
|
|
||||||
|
struct gprs_rlcmac_tbf *tbf_alloc(uint8_t tfi);
|
||||||
|
|
||||||
|
static struct gprs_rlcmac_tbf *tbf_by_tfi(uint8_t tfi);
|
||||||
|
|
||||||
|
static struct gprs_rlcmac_tbf *tbf_by_tlli(uint8_t tlli);
|
||||||
|
|
||||||
|
static void tbf_free(struct gprs_rlcmac_tbf *tbf);
|
||||||
|
|
||||||
|
/* TS 44.060 Section 10.4.7 Table 10.4.7.1: Payload Type field */
|
||||||
|
enum gprs_rlcmac_block_type {
|
||||||
|
GPRS_RLCMAC_DATA_BLOCK = 0x0,
|
||||||
|
GPRS_RLCMAC_CONTROL_BLOCK = 0x1,
|
||||||
|
GPRS_RLCMAC_CONTROL_BLOCK_OPT = 0x2,
|
||||||
|
GPRS_RLCMAC_RESERVED = 0x3
|
||||||
|
};
|
||||||
|
|
||||||
|
void gprs_rlcmac_tx_ul_ack(uint8_t tfi, uint32_t tlli, RlcMacUplinkDataBlock_t * ul_data_block);
|
||||||
|
|
||||||
|
void gprs_rlcmac_data_block_parse(gprs_rlcmac_tbf* tbf, RlcMacUplinkDataBlock_t * ul_data_block);
|
||||||
|
|
||||||
|
int gprs_rlcmac_rcv_data_block(BitVector *rlc_block);
|
||||||
|
|
||||||
|
int gprs_rlcmac_rcv_control_block(BitVector *rlc_block);
|
||||||
|
|
||||||
|
void gprs_rlcmac_rcv_block(BitVector *rlc_block);
|
||||||
|
|
||||||
|
void gprs_rlcmac_tx_dl_data_block(uint32_t tlli, uint8_t *pdu, int start_index, int end_index, uint8_t bsn, uint8_t fbi);
|
||||||
|
|
||||||
|
int gprs_rlcmac_segment_llc_pdu(struct gprs_rlcmac_tbf *tbf);
|
||||||
|
|
||||||
|
void gprs_rlcmac_tx_ul_ud(gprs_rlcmac_tbf *tbf);
|
||||||
|
|
||||||
|
#endif // GPRS_RLCMAC_H
|
|
@ -0,0 +1,91 @@
|
||||||
|
/* pcu_l1_if.cpp
|
||||||
|
*
|
||||||
|
* Copyright (C) 2012 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 <gsmtap.h>
|
||||||
|
#include <gprs_rlcmac.h>
|
||||||
|
#include <Threads.h>
|
||||||
|
#include <pcu_l1_if.h>
|
||||||
|
|
||||||
|
#define MAX_UDP_LENGTH 1500
|
||||||
|
|
||||||
|
// TODO: We should take ports and IP from config.
|
||||||
|
UDPSocket pcu_l1if_socket(5070, "127.0.0.1", 5934);
|
||||||
|
UDPSocket pcu_gsmtap_socket(5077, "127.0.0.1", 4729);
|
||||||
|
|
||||||
|
// Send RLC/MAC block to OpenBTS.
|
||||||
|
void pcu_l1if_tx(BitVector * block)
|
||||||
|
{
|
||||||
|
char buffer[MAX_UDP_LENGTH];
|
||||||
|
int ofs = 0;
|
||||||
|
block->pack((unsigned char*)&buffer[ofs]);
|
||||||
|
ofs += block->size() >> 3;
|
||||||
|
COUT("Send to OpenBTS: " << *block);
|
||||||
|
pcu_l1if_socket.write(buffer, ofs);
|
||||||
|
}
|
||||||
|
|
||||||
|
// Recieve RLC/MAC block from OpenBTS.
|
||||||
|
void *pcu_l1if_rx(void *)
|
||||||
|
{
|
||||||
|
BitVector *block = new BitVector(23*8);
|
||||||
|
pcu_l1if_socket.nonblocking();
|
||||||
|
while (1) {
|
||||||
|
char buf[MAX_UDP_LENGTH];
|
||||||
|
int count = pcu_l1if_socket.read(buf, 3000);
|
||||||
|
if (count>0) {
|
||||||
|
block->unpack((const unsigned char*)buf);
|
||||||
|
COUT("Recieve from OpenBTS (MS): " << *block);
|
||||||
|
gprs_rlcmac_rcv_block(block);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
void gsmtap_send_llc(uint8_t * data, unsigned len)
|
||||||
|
{
|
||||||
|
char buffer[MAX_UDP_LENGTH];
|
||||||
|
int ofs = 0;
|
||||||
|
|
||||||
|
// Build header
|
||||||
|
struct gsmtap_hdr *header = (struct gsmtap_hdr *)buffer;
|
||||||
|
header->version = 2;
|
||||||
|
header->hdr_len = sizeof(struct gsmtap_hdr) >> 2;
|
||||||
|
header->type = 0x08;
|
||||||
|
header->timeslot = 5;
|
||||||
|
header->arfcn = 0;
|
||||||
|
header->signal_dbm = 0;
|
||||||
|
header->snr_db = 0;
|
||||||
|
header->frame_number = 0;
|
||||||
|
header->sub_type = 0;
|
||||||
|
header->antenna_nr = 0;
|
||||||
|
header->sub_slot = 0;
|
||||||
|
header->res = 0;
|
||||||
|
|
||||||
|
ofs += sizeof(*header);
|
||||||
|
|
||||||
|
// Add frame data
|
||||||
|
unsigned j = 0;
|
||||||
|
for (unsigned i = ofs; i < len+ofs; i++)
|
||||||
|
{
|
||||||
|
buffer[i] = (char)data[j];
|
||||||
|
j++;
|
||||||
|
}
|
||||||
|
ofs += len;
|
||||||
|
// Write the GSMTAP packet
|
||||||
|
pcu_gsmtap_socket.write(buffer, ofs);
|
||||||
|
}
|
|
@ -1,6 +1,6 @@
|
||||||
/* RLCMAC.cpp
|
/* pcu_l1_if.h
|
||||||
*
|
*
|
||||||
* Copyright (C) 2011 Ivan Klyuchnikov
|
* Copyright (C) 2012 Ivan Klyuchnikov
|
||||||
*
|
*
|
||||||
* This program is free software; you can redistribute it and/or
|
* This program is free software; you can redistribute it and/or
|
||||||
* modify it under the terms of the GNU General Public License
|
* modify it under the terms of the GNU General Public License
|
||||||
|
@ -17,10 +17,15 @@
|
||||||
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
||||||
*/
|
*/
|
||||||
|
|
||||||
#include "bssgp.h"
|
#ifndef PCU_L1_IF_H
|
||||||
|
#define PCU_L1_IF_H
|
||||||
|
|
||||||
int main(int argc, char *argv[])
|
#include <BitVector.h>
|
||||||
{
|
|
||||||
// Start RLC/MAC server for communication with OpenBTS and OsmoSGSN.
|
void pcu_l1if_tx(BitVector * block);
|
||||||
RLCMACServer();
|
|
||||||
}
|
void *pcu_l1if_rx(void *);
|
||||||
|
|
||||||
|
void gsmtap_send_llc(uint8_t * data, unsigned len);
|
||||||
|
|
||||||
|
#endif // PCU_L1_IF_H
|
|
@ -0,0 +1,94 @@
|
||||||
|
/* pcu_main.cpp
|
||||||
|
*
|
||||||
|
* Copyright (C) 2012 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 <gprs_bssgp_pcu.h>
|
||||||
|
#include <Threads.h>
|
||||||
|
#include <Sockets.h>
|
||||||
|
#include <pcu_l1_if.h>
|
||||||
|
|
||||||
|
// TODO: We should move this parameters to config file.
|
||||||
|
#define SGSN_IP "127.0.0.1"
|
||||||
|
#define SGSN_PORT 23000
|
||||||
|
#define NSVCI 4
|
||||||
|
|
||||||
|
|
||||||
|
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_pcu_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;
|
||||||
|
}
|
||||||
|
|
||||||
|
int main(int argc, char *argv[])
|
||||||
|
{
|
||||||
|
uint16_t nsvci = NSVCI;
|
||||||
|
struct gprs_ns_inst *sgsn_nsi;
|
||||||
|
struct gprs_nsvc *nsvc;
|
||||||
|
// Socket for reading BitVectors (RLC/MAC Frames) from OpenBTS application.
|
||||||
|
Thread pcu_l1if;
|
||||||
|
pcu_l1if.start(pcu_l1if_rx, 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 = btsctx_alloc(BVCI, NSEI);
|
||||||
|
bctx->cell_id = CELL_ID;
|
||||||
|
bctx->nsei = NSEI;
|
||||||
|
bctx->ra_id.mnc = MNC;
|
||||||
|
bctx->ra_id.mcc = MCC;
|
||||||
|
bctx->ra_id.lac = PCU_LAC;
|
||||||
|
bctx->ra_id.rac = PCU_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, BVCI, cause);
|
||||||
|
}
|
||||||
|
i++;
|
||||||
|
}
|
||||||
|
}
|
Loading…
Reference in New Issue