//***************byteGenerator Layer***************
void applicationLayerByteGenerator(BYTES *_bytes) {
int i;
size_t rnd;
while (1) {
usleep(400 * 1000);
rnd = rand() % 8;
_bytes->size = rnd;
if (rnd > 0) {
_bytes->byteArr = (char*) malloc((rnd) * sizeof(char));
for (i = 0; i < rnd; i++) {
_bytes->byteArr[i] = rand();
}
} else {
_bytes->byteArr = NULL;
}
transportLayer(_bytes);//send them out to a transport layer.
if (rnd > 0) {
free(_bytes->byteArr);
}
}
}
int main(int argc, char **argv)
{
int ret = validateArgs(argc, argv);
if(ret == 0){
printf("Argument's not supported\n");
return 1;
}
else if(ret == 2){
return 0;
}
else if(ret == 1){
transportLayer();
}
return 0;
}
void *physicalPacket(BYTES *_bytes) {
time_t lastByte = time(NULL);
if (_bytes->mode == 0) {
switch (_bytes->statePhy) {
case PHYSICAL_SEND_TO_BYTE_PHYSICAL:
_bytes->mode = 1;
_bytes->statePhy = PHYSICAL_GET_FROM_PACKET_PHYSICAL;
for (;;) {
//wait to transport///////////////////////////
pthread_mutex_lock(&tranprotPhysical);
if (bufferIndexTransToPhy == -1) {
pthread_cond_wait(&BufferTtP_Not_Empty, &tranprotPhysical);
}
if (time(NULL) - lastByte > 1) {
physicalByte(_bytes);
}
_bytes->byteArr[_bytes->size++]
= BUFFERTtP[bufferIndexTransToPhy--];
lastByte = time(NULL);
if (_bytes->size == 10) {
physicalByte(_bytes);
}
pthread_mutex_unlock(&tranprotPhysical);
pthread_cond_signal(&BufferTtP_Not_Full);
/////////////////////////////////////////////////
}
break;
case PHYSICAL_SEND_TO_PACKET_PHYSICAL:
for (;;) {
pthread_mutex_lock(&physicalM);
if (bufferIndexPhyToPhy == BufferSize) {
pthread_cond_wait(&BufferPtP_Not_Full, &physicalM);
}
///////////wait to transport///////////////////////////
pthread_mutex_lock(&tranprotPhysical);
if (bufferIndexTransToPhy == -1) {
pthread_cond_wait(&BufferTtP_Not_Empty, &tranprotPhysical);
}
while (!(time(NULL) - lastByte > 1 || _bytes->size == 10
|| bufferIndexPhyToPhy > 9 || bufferIndexTransToPhy < 0)) {
BUFFERPtP[bufferIndexPhyToPhy++]
= BUFFERTtP[bufferIndexTransToPhy--];
lastByte = time(NULL);
}
pthread_mutex_unlock(&tranprotPhysical);
pthread_cond_signal(&BufferTtP_Not_Full);
/////////////////////////////////////////////////////
pthread_mutex_unlock(&physicalM);
pthread_cond_signal(&BufferPtP_Not_Empty);
}
break;
}
} else {
for (;;) {
pthread_mutex_lock(&physicalM);
if (bufferIndexPhyToPhy == -1) {
pthread_cond_wait(&BufferPtP_Not_Empty, &physicalM);
}
if (time(NULL) - lastByte > 1) {
transportLayer(_bytes);
}
while (bufferIndexPhyToPhy > 0) {//taking all the packet
_bytes->byteArr[_bytes->size++]
= BUFFERPtP[bufferIndexPhyToPhy--];
lastByte = time(NULL);
if (_bytes->size == 10) {
transportLayer(_bytes);
}
}
pthread_mutex_unlock(&physicalM);
pthread_cond_signal(&BufferPtP_Not_Full);
}
}
free(_bytes->byteArr);
free(_bytes);
return 0;
}
//***************Physical Layer*********************************
void *physicalByte(BYTES *_bytes) {
int i = 0;
if (_bytes->mode == 0) {
for (;;) {
pthread_mutex_lock(&physicalM);
if (bufferIndexPhyToPhy == BufferSize) {
pthread_cond_wait(&BufferPtP_Not_Full, &physicalM);
}
//wait to transport//////////////////////
pthread_mutex_lock(&tranprotPhysical);
if (bufferIndexTransToPhy == -1) {
pthread_cond_wait(&BufferTtP_Not_Empty, &tranprotPhysical);
}
BUFFERPtP[bufferIndexPhyToPhy++]
= BUFFERTtP[bufferIndexTransToPhy--];
pthread_mutex_unlock(&tranprotPhysical);
pthread_cond_signal(&BufferTtP_Not_Full);
//////////////////////////////////////////
pthread_mutex_unlock(&physicalM);
pthread_cond_signal(&BufferPtP_Not_Empty);
}
} else {
switch (_bytes->statePhy) {
case PHYSICAL_GET_FROM_BYTE_PHYSICAL:
for (;;) {
pthread_mutex_lock(&physicalM);
if (bufferIndexPhyToPhy == -1) {
pthread_cond_wait(&BufferPtP_Not_Empty, &physicalM);
}
_bytes->byteArr[0] = BUFFERPtP[bufferIndexPhyToPhy--];
transportLayer(_bytes);
pthread_mutex_unlock(&physicalM);
pthread_cond_signal(&BufferPtP_Not_Full);
}
break;
case PHYSICAL_GET_FROM_PACKET_PHYSICAL:
_bytes->size--;
for (i = 0; i < _bytes->size - 1; i++) {
_bytes->byteArr[0] = _bytes->byteArr[i];
transportLayer(_bytes);
}
_bytes->size = 0;
break;
}
return 0;
}
free(_bytes->byteArr);
free(_bytes);
return 0;
}