FILE *openfile;

/*Opening the file*/
	filePath=(char *)malloc(sizeof(char)*70);
	if(!strcmp(picToSEND->dirName,"Pic"))
	{
		sprintf(filePath,"Pic/%s",picToSEND->FileName);
		//FILE *openfile = fopen ( filePath, "r" );
		openfile = fopen ( filePath, "r" );
		if ( openfile == 0 )
		{
			printf( "Could not open file\n" );
			exit(1);
		}
	}
	else if(!strcmp(picToSEND->dirName,"UploadedPic"))
	{
		sprintf(filePath,"UploadedPic/%s",picToSEND->FileName);
		//FILE *openfile = fopen ( filePath, "r" );
		openfile = fopen ( filePath, "r" );
		if ( openfile == 0 )
		{
			printf( "Could not open file\n" );
			exit(1);
		}
	}

while(bytesToSend>0)
	{
		if(RetransmitCounter<6)
		{
			if (NextPack==1)
			{
				/*Getting the next chank from file*/
				//printf("\n\nBytes left to send %d\n",bytesToSend);
				if(ACK=='1')
				{
					ACK='0';
				}
				else
				{
					ACK='1';
				}
				if (bytesToSend>511)
				{
					//	printf("reading next chank from file\n");
					memset(line,0,sizeof(line));
					readnum=fread(line,1,511,openfile);
					Packetnum=Packetnum+1;
					//printf("*open file pointer %d\n",openfile);
					//printf("read from file : %s\n",line);
					//printf("reading 511 bytes\n\n");
					/*Fix*/
					memset(packet,0,sizeof(packet));
					sprintf(packet,"%c",ACK);
					memcpy(&packet,line,511);
					/*/
					NextPack=0;
				}
				else
				{//last packet
					readnum=fread(line,1,bytesToSend,openfile);
					Packetnum=Packetnum+1;
					//printf("*open file pointer %d\n",openfile);
					/*FIX*/
					memset(packet,0,sizeof(packet));
					sprintf(packet,"%c",ACK);
					memcpy(&packet,line,bytesToSend);
					/*/
					NextPack=0;
				}
			}
			slen=sizeof(UPDsocket);
			//printf("Sending now %s\n",packet);
			sendto(Soc, packet, readnum+1, 0, &UPDsocket, slen);
			/*timeout for ack*/
			tv.tv_usec=500000;
			tv.tv_sec=0;
			FD_ZERO(&read_set);
			FD_SET(Soc,&read_set);
			resulte=select(Soc+1,&read_set,NULL,NULL,&tv);
			if(resulte>0)
			{
				if(FD_ISSET(Soc,&read_set))
				{
					/*handle getting thisData*/
					slen=sizeof(recvFromSocket);
					recvfrom(Soc, ACKrec, 1,0,(struct sockaddr *)&recvFromSocket,&slen);
					if(ACK==ACKrec)
					{
						sprintf(RecvIpAddress,"%s",inet_ntoa(recvFromSocket.sin_addr));
						if(!strcmp(RecvIpAddress,IpAddress))
						{
							//got the ack that expected and also from the destination that sent to.
							NextPack=1;
							RetransmitCounter=0;
							bytesToSend=bytesToSend-readnum;
						}
						else
						{
							RetransmitCounter++;
						}
					}
					else
					{
						RetransmitCounter++;
					}
				}
			}
			else if(resulte==0)
			{
				RetransmitCounter++;
			}
		}
		else
		{
			printf("Error : Stoping Upload after 5 Retransmition .\n");
			fclose(openfile);
			close(Soc);
			return;
		}
	}

**	close(openfile); ***-
	close(Soc);
	return;
}

(511 - Header) בתים

bytesToSend=bytesToSend-readnum;