السلام عليكم ورحمة الله وبركاته
اصدقائي الاعزاء خبراء البرمجة
ممكن تساعدوني في تحويل هذا الكود الى لغة C++
بجميع اوامره
بحيث يصبح بلغة C++ 100%
ولكم جزيل الشكر
packet buffer;
struct frame
{ /* frame structure */
packet info;
int seq;
int ack;
int kind;
};
int NextFrameToSend;
int FrameExpected;
int PacketLength;
int waiting;
initialise()
{
NextFrameToSend=0;
FrameExpected=0;
PacketLength = 0;
waiting = FALSE;
}
/* Main protocol service routine */
protocol(event)
int event;
{
struct frame x,*y;
switch(event)
{
case PacketReady :
/* a packet has arrived from the network layer */
get_packet(&buffer, &PacketLength);
x.info = buffer; /* place packet in frame */
x.seq = NextFrameToSend;
/* piggyback acknowledge of last frame received */
x.ack = 1-FrameExpected;
if(channel_idle())
{
send_frame(&x, PacketLength); /* send it to physical layer */
start_timer(0, Timer);
waiting = FALSE;
}
else
waiting = TRUE;
disable_network_layer();
break;
case FrameArrival :
/* a frame has arrived from the physical layer */
get_frame(&y); /* get the frame */
/* check that it is the one that is expected */
if (y->seq==FrameExpected)
{
send_packet(y->info); /* valid frame */
FrameExpected = 1-FrameExpected;
}
if(y->ack==NextFrameToSend) /* acknowledgment has arrived */
{
enable_network_layer();
NextFrameToSend = 1-NextFrameToSend;
}
break;
case TimeOut :
/* a frame has not been ACKed in time, */
/* so re-send the outstanding frame */
x.info = buffer;
x.seq = NextFrameToSend;
x.ack = 1-FrameExpected;
send_frame(&x, PacketLength);
start_timer(0, Timer);
break;
case ChannelIdle:
if ( waiting )
{
x.info = buffer;
x.seq = NextFrameToSend;
x.ack = 1-FrameExpected;
send_frame(&x, PacketLength); /* send it to physical layer */
start_timer(0, Timer);
waiting = FALSE;
}
break;
case CheckSumError : /* ignored */
break;
}
}
