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dmr.c
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dmr.c
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/*
* Linux DMR Master server
Copyright (C) 2014 Wim Hofman
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.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "master_server.h"
#define NUMSLOTS 2 //DMR IS 2 SLOT
#define SLOT1 4369 //HEX 1111
#define SLOT2 8738 //HEX 2222
//#define VCALL 4369 //HEX 1111
//#define DCALL 26214 //HEX 6666
//#define ISSYNC 61166 //HEX EEEE
//#define VCALLEND 8738 //HEX 2222
//#define CALL 2
//#define CALLEND 3
//#define PTYPE_ACTIVE1 2
//#define PTYPE_END1 3
//#define PTYPE_ACTIVE2 66
//#define PTYPE_END2 67
#define VFRAMESIZE 72 //UDP PAYLOAD SIZE OF REPEATER VOICE/DATA TRAFFIC
//#define SYNC_OFFSET1 18 //UDP OFFSETS FOR VARIOUS BYTES IN THE DATA STREAM
//#define SYNC_OFFSET2 19 //
//#define SYNC_OFFSET3 18 //Look for EEEE
//#define SYNC_OFFSET4 19 //Look for EEEE
#define SLOT_OFFSET1 16 //
#define SLOT_OFFSET2 17
#define PTYPE_OFFSET 8
#define SRC_OFFSET1 68
#define SRC_OFFSET2 69
#define SRC_OFFSET3 70
#define DST_OFFSET1 64
#define DST_OFFSET2 65
#define DST_OFFSET3 66
#define TYP_OFFSET1 62
#define SLOT_TYPE_OFFSET1 18
#define SLOT_TYPE_OFFSET2 19
#define FRAME_TYPE_OFFSET1 22
#define FRAME_TYPE_OFFSET2 23
struct allow{
bool repeater;
bool sMaster;
bool isRange;
};
void delRdacRepeater();
void delRepeater();
bool * convertToBits();
bool * decodeBPTC1969();
struct allow checkTalkGroup(int dstId, int slot, int callType){
struct allow toSend = {0};
int i;
toSend.isRange = false;
//First check sMaster talk groups. All sMaster talkgroups apply to the repeaters also
if (slot == 1){
for(i=0;i<master.sMasterTS1GroupCount;i++){
if (dstId >= sMasterTS1List[i][0] && dstId <= sMasterTS1List[i][1]){
toSend.repeater = true;
toSend.sMaster = true;
if (sMasterTS1List[i][0] != sMasterTS1List[i][1]) toSend.isRange = true;
return toSend;
}
}
}
else{
for(i=0;i<master.sMasterTS2GroupCount;i++){
if (dstId >= sMasterTS2List[i][0] && dstId <= sMasterTS2List[i][1]){
toSend.repeater = true;
toSend.sMaster = true;
if (sMasterTS2List[i][0] != sMasterTS2List[i][1]) toSend.isRange = true;
return toSend;
}
}
}
if (slot == 1){
for(i=0;i<master.repTS1GroupCount;i++){
if (dstId >= repTS1List[i][0] && dstId <= repTS1List[i][1]){
toSend.repeater = true;
toSend.sMaster = false;
if (repTS1List[i][0] != repTS1List[i][1]) toSend.isRange = true;
return toSend;
}
}
}
else{
for(i=0;i<master.repTS2GroupCount;i++){
if (dstId >= repTS2List[i][0] && dstId <= repTS2List[i][1]){
toSend.repeater = true;
toSend.sMaster = false;
if (repTS2List[i][0] != repTS2List[i][1]) toSend.isRange = true;
return toSend;
}
}
}
toSend.repeater = false;
toSend.sMaster = false;
syslog(LOG_NOTICE,"Talk group %i not allowed on slot %i",dstId,slot);
return toSend;
}
void echoTest(unsigned char buffer[VFRAMESIZE],int sockfd, struct sockaddr_in address, int srcId, int repPos){
struct frame{
unsigned char buf[VFRAMESIZE];
};
struct frame record[2000];
long frames = 0;
int n,rc,i;
int slotType=0,frameType=0;
fd_set fdMaster;
struct timeval timeout;
struct sockaddr_in cliaddr;
socklen_t len;
bool timedOut = false;
FILE *referenceFile;
FILE *recordFile;
char fileName[100];
sprintf(fileName,"%i.record",srcId);
recordFile = fopen(fileName,"wb");
FD_ZERO(&fdMaster);
memcpy(record[frames].buf,buffer,VFRAMESIZE);
fwrite(buffer,VFRAMESIZE,1,recordFile);
len = sizeof(cliaddr);
do{
FD_SET(sockfd, &fdMaster);
timeout.tv_sec = 1;
timeout.tv_usec = 0;
if (rc = select(sockfd+1, &fdMaster, NULL, NULL, &timeout) == -1) {
close(sockfd);
pthread_exit(NULL);
}
if (FD_ISSET(sockfd,&fdMaster)) {
n = recvfrom(sockfd,buffer,VFRAMESIZE,0,(struct sockaddr *)&cliaddr,&len);
if (n>2){
slotType = buffer[SLOT_TYPE_OFFSET1] << 8 | buffer[SLOT_TYPE_OFFSET2];
frameType = buffer[FRAME_TYPE_OFFSET1] << 8 | buffer[FRAME_TYPE_OFFSET2];
if (frames < 2000){
frames++;
memcpy(record[frames].buf,buffer,VFRAMESIZE);
fwrite(buffer,VFRAMESIZE,1,recordFile);
}
}
}
else{
timedOut = true;
}
}while ((slotType != 0x2222 && frameType != 0xaaaa) || timedOut == false);
fclose(recordFile);
sleep(1);
syslog(LOG_NOTICE,"Playing echo back for radio %i",srcId);
for (i=0;i<=frames;i++){
sendto(sockfd,record[i].buf,VFRAMESIZE,0,(struct sockaddr *)&address,sizeof(address));
slotType = record[i].buf[SLOT_TYPE_OFFSET1] << 8 | record[i].buf[SLOT_TYPE_OFFSET2];
frameType = record[i].buf[FRAME_TYPE_OFFSET1] << 8 | record[i].buf[FRAME_TYPE_OFFSET2];
if (slotType != 0xeeee && frameType != 0x1111) usleep(60000);
}
sprintf(fileName,"reference_%s.voice",repeaterList[repPos].language);
if (referenceFile = fopen(fileName,"rb")){
sleep(1);
syslog(LOG_NOTICE,"Playing reference file %s",fileName);
while (fread(buffer,VFRAMESIZE,1,referenceFile)){
sendto(sockfd,buffer,VFRAMESIZE,0,(struct sockaddr *)&address,sizeof(address));
slotType = buffer[SLOT_TYPE_OFFSET1] << 8 | buffer[SLOT_TYPE_OFFSET2];
frameType = buffer[FRAME_TYPE_OFFSET1] << 8 | buffer[FRAME_TYPE_OFFSET2];
if (slotType != 0xeeee && frameType != 0x1111) usleep(60000);
}
fclose(referenceFile);
}
else{
syslog(LOG_NOTICE,"reference file %s not found",fileName);
}
}
void *dmrListener(void *f){
int sockfd,n,i,rc;
struct sockaddr_in servaddr,cliaddr;
socklen_t len;
unsigned char buffer[VFRAMESIZE];
unsigned char response[VFRAMESIZE] ={0};
//int repPos = (intptr_t)f;
struct sockInfo* param = (struct sockInfo*) f;
int repPos = param->port - baseDmrPort;
struct sockaddr_in cliaddrOrg = param->address;
int packetType = 0;
int frameType = 0;
int slotType = 0;
int srcId = 0;
int dstId = 0;
int callType = 0;
unsigned char slot = 0;
fd_set fdMaster;
struct timeval timeout;
time_t timeNow,pingTime;
struct allow toSend = {0};
bool block[3];
unsigned char sMasterFrame[103];
char myId[11];
unsigned char webUserInfo[100];
//{0x00,0x00,0x00,0x00,0x32,0x30,0x34,0x31,0x39,0x2e,0x37}
unsigned char dmrPacket[33];
bool *bits;
syslog(LOG_NOTICE,"DMR thread for port %i started",baseDmrPort + repPos);
sockfd=socket(AF_INET,SOCK_DGRAM,0);
repeaterList[repPos].sockfd = sockfd;
repeaterList[repPos].dmrOnline = true;
repeaterList[repPos].sending[1] = false;
repeaterList[repPos].sending[2] = false;
block[1] = false;
block[2] = false;
dmrState[1] = IDLE;
dmrState[2] = IDLE;
//create frame to append after packet for sMaster
memset(sMasterFrame,0,103);
memcpy(myId,(char*)&repeaterList[repPos].id,sizeof(int));
memcpy(myId+4,master.ownCountryCode,4);
memcpy(myId+7,master.ownRegion,1);
memcpy(myId+8,version,3);
bzero(&servaddr,sizeof(servaddr));
servaddr.sin_family = AF_INET;
servaddr.sin_addr.s_addr=htonl(INADDR_ANY);
servaddr.sin_port=htons(baseDmrPort + repPos);
bind(sockfd,(struct sockaddr *)&servaddr,sizeof(servaddr));
FD_ZERO(&fdMaster);
time(&pingTime);
len = sizeof(cliaddr);
for (;;){
FD_SET(sockfd, &fdMaster);
timeout.tv_sec = 1;
timeout.tv_usec = 0;
if (rc = select(sockfd+1, &fdMaster, NULL, NULL, &timeout) == -1) {
syslog(LOG_NOTICE,"Select error, closing socket port %i",baseDmrPort + repPos);
close(sockfd);
pthread_exit(NULL);
}
if (FD_ISSET(sockfd,&fdMaster)) {
n = recvfrom(sockfd,buffer,VFRAMESIZE,0,(struct sockaddr *)&cliaddr,&len);
if (n>2){
slot = buffer[SLOT_OFFSET1] / 16;
if (dmrState[slot] == IDLE || repeaterList[repPos].sending[slot]){
packetType = buffer[PTYPE_OFFSET];
slotType = buffer[SLOT_TYPE_OFFSET1] << 8 | buffer[SLOT_TYPE_OFFSET2];
frameType = buffer[FRAME_TYPE_OFFSET1] << 8 | buffer[FRAME_TYPE_OFFSET2];
switch (packetType){
case 0x02:
if (slotType == 0xeeee && frameType == 0x1111 && dmrState[slot] != VOICE && block[slot] == false){ //Hytera voice sync packet
//Sync packet is send before Voice LC header and every time the embedded LC (4 packets) in a voice superframe has been send
//When voice call starts, this is the first packet where we can see src and dst)
sMasterFrame[98] = slot;
srcId = buffer[SRC_OFFSET3] << 16 | buffer[SRC_OFFSET2] << 8 | buffer[SRC_OFFSET1];
dstId = buffer[DST_OFFSET3] << 16 | buffer[DST_OFFSET2] << 8 | buffer[DST_OFFSET1];
callType = buffer[TYP_OFFSET1];
repeaterList[repPos].sending[slot] = true;
sprintf(webUserInfo,"RX_Slot=%i,GROUP=%i,USER_ID=%i,TYPE=Voice,VERS=%s,RPTR=%i,%s\n",slot,dstId,srcId,version,repeaterList[repPos].id,master.ownName);
if (sMaster.online){
sendto(sMaster.sockfd,webUserInfo,strlen(webUserInfo),0,(struct sockaddr *)&sMaster.address,sizeof(sMaster.address));
}
if (dstId == echoId){
syslog(LOG_NOTICE,"[%i-%s]Echo test started on slot %i src %i",baseDmrPort + repPos,repeaterList[repPos].callsign,slot,srcId);
echoTest(buffer,sockfd,repeaterList[repPos].address,srcId,repPos);
repeaterList[repPos].sending[slot] = false;
break;
}
toSend = checkTalkGroup(dstId,slot,callType);
if (toSend.repeater == false){
block[slot] = true;
break;
}
if(toSend.isRange && dstId != master.ownCCInt){
memcpy(sMasterFrame+90,(char*)&master.ownCCInt,sizeof(int));
}
else{
memset(sMasterFrame+90,0,4);
}
dmrState[slot] = VOICE;
syslog(LOG_NOTICE,"[%i-%s]Voice call started on slot %i src %i dst %i type %i",baseDmrPort + repPos,repeaterList[repPos].callsign,slot,srcId,dstId,callType);
//break;
}
break;
case 0x01:
if (slotType == 0x3333 && dmrState[slot] != DATA){ //CSBK (first slot type for data where we can see src and dst)
srcId = buffer[SRC_OFFSET3] << 16 | buffer[SRC_OFFSET2] << 8 | buffer[SRC_OFFSET1];
dstId = buffer[DST_OFFSET3] << 16 | buffer[DST_OFFSET2] << 8 | buffer[DST_OFFSET1];
callType = buffer[TYP_OFFSET1];
toSend.sMaster = false;
if (dstId == rrsGpsId) toSend.repeater = false;
break;
}
memcpy(dmrPacket,buffer+26,34); //copy the dmr part out of the Hyetra packet
bits = convertToBits(dmrPacket); //convert it to bits
if (slotType == 0x4444){ //Data header
syslog(LOG_NOTICE,"[%i-%s]Data header on slot %i src %i dst %i type %i",baseDmrPort + repPos,repeaterList[repPos].callsign,slot,srcId,dstId,callType);
dmrState[slot] = DATA;
repeaterList[repPos].sending[slot] = true;
decodeBPTC1969(bits);
break;
}
if (slotType == 0x5555 && dmrState[slot] == DATA){ // 1/2 rate data continuation
//put idle when blocks to follow equals
dmrState[slot] = IDLE;
repeaterList[repPos].sending[slot] = false;
syslog(LOG_NOTICE,"[%i-%s]1/2 rate data continuation on slot %i src %i dst %i type %i",baseDmrPort + repPos,repeaterList[repPos].callsign,slot,srcId,dstId,callType);
break;
}
if (slotType == 0x6666 && dmrState[slot] == DATA){ // 3/4 rate data continuation
syslog(LOG_NOTICE,"[%i-%s]3/4 rate data continuation on slot %i src %i dst %i type %i",baseDmrPort + repPos,repeaterList[repPos].callsign,slot,srcId,dstId,callType);
//put idle when blocks to follow equals
dmrState[slot] = IDLE;
repeaterList[repPos].sending[slot] = false;
break;
}
break;
case 0x03:
if (slotType == 0x2222){ //Terminator with LC
dmrState[slot] = IDLE;
repeaterList[repPos].sending[slot] = false;
syslog(LOG_NOTICE,"[%i-%s]Voice call ended on slot %i",baseDmrPort + repPos,repeaterList[repPos].callsign,slot);
if (block[slot] == true) syslog(LOG_NOTICE,"[%i-%s] But was blocked because of not allowed talk group",baseDmrPort + repPos,repeaterList[repPos].callsign);
block[slot] = false;
}
break;
}
if (!block[slot]){
for (i=0;i<highestRepeater;i++){
if (repeaterList[i].address.sin_addr.s_addr !=0 && repeaterList[i].address.sin_addr.s_addr != cliaddrOrg.sin_addr.s_addr){
sendto(repeaterList[i].sockfd,buffer,n,0,(struct sockaddr *)&repeaterList[i].address,sizeof(repeaterList[i].address));
}
}
if (toSend.sMaster && sMaster.online){
memcpy(sMasterFrame,buffer,n);
memcpy(sMasterFrame + n,myId,11);
sendto(sMaster.sockfd,sMasterFrame,103,0,(struct sockaddr *)&sMaster.address,sizeof(sMaster.address));
}
}
}
else{
syslog(LOG_NOTICE,"[%i-%s]Incomming traffic on slot %i, but DMR not IDLE",baseDmrPort + repPos,repeaterList[repPos].callsign,slot);
}
}
else{
response[0] = 0x41;
sendto(sockfd,response,n,0,(struct sockaddr *)&cliaddr,sizeof(cliaddr));
time(&pingTime);
}
}
else{
if (restart){
syslog(LOG_NOTICE,"Exiting dmr thread (restart)");
close(sockfd);
pthread_exit(NULL);
}
time(&timeNow);
if (repeaterList[repPos].sending[1] && dmrState[1] != IDLE){
if (dmrState[1] == VOICE) syslog(LOG_NOTICE,"[%i-%s]Voice call ended after timeout on slot 1",baseDmrPort + repPos,repeaterList[repPos].callsign);
if (dmrState[1] == DATA) syslog(LOG_NOTICE,"[%i-%s]Data call ended after timeout on slot 1",baseDmrPort + repPos,repeaterList[repPos].callsign);
dmrState[1] = IDLE;
repeaterList[repPos].sending[1] = false;
block[1] = false;
syslog(LOG_NOTICE,"[%i-%s]Slot 1 IDLE",baseDmrPort + repPos,repeaterList[repPos].callsign);
}
if (repeaterList[repPos].sending[2] && dmrState[2] != IDLE){
if (dmrState[2] == VOICE) syslog(LOG_NOTICE,"[%i-%s]Voice call ended after timeout on slot 2",baseDmrPort + repPos,repeaterList[repPos].callsign);
if (dmrState[2] == DATA) syslog(LOG_NOTICE,"[%i-%s]Data call ended after timeout on slot 2",baseDmrPort + repPos,repeaterList[repPos].callsign);
dmrState[2] = IDLE;
repeaterList[repPos].sending[2] = false;
block[2] = false;
syslog(LOG_NOTICE,"[%i-%s]Slot 2 IDLE",baseDmrPort + repPos,repeaterList[repPos].callsign);
}
if (difftime(timeNow,pingTime) > 60 && !repeaterList[repPos].sending[slot]){
syslog(LOG_NOTICE,"PING timeout on DMR port %i repeater %s, exiting thread",baseDmrPort + repPos,repeaterList[repPos].callsign);
syslog(LOG_NOTICE,"Removing repeater from list position %i",repPos);
delRepeater(cliaddrOrg);
if (repPos + 1 == highestRepeater) highestRepeater--;
delRdacRepeater(cliaddrOrg);
close(sockfd);
pthread_exit(NULL);
}
}
}
}