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POFile Transfer - Packet Rounds
 

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  1. POFile Transfer - Packet Rounds
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    <p>I'm basically using a 20,480byte buffer that is into a packet structure. Here is the structure:</p> <pre><code>struct PACKET { DWORD Header; char data[20480]; bool eof; }; </code></pre> <p>What I'm doing is reading a file 20,480bytes at a time and sending it until all the file has been sent. I am testing this on a 3MB file and roughly 150 rounds are sent.</p> <p>Here is the code: </p> <pre><code>PACKET sc; sc.Header = 0xB; ifstream file("test.pdf", ios::ate | ios::binary | ios::in); DWORD fileSize = file.tellg(); file.seekg(0, ios::beg) int counter = 20480; int rounds = fileSize / 20480 + 1; </code></pre> <p>And the sending loop:</p> <pre><code>while (rounds != 0) { sc.eof = false; file.read(sc.data, sizeof(sc.data)); send(Slick.client, (char*)&amp;sc, sizeof(sc), 0); file.seekg(counter + 1); counter = counter + 20480; rounds--; Sleep(1); if (rounds == 0) sc.eof = true; cout &lt;&lt; "Left to send: " &lt;&lt; rounds &lt;&lt; endl; } file.close(); cout &lt;&lt; "All data was sent!" &lt;&lt; endl; </code></pre> <p>I'm using asynchronous sockets on the other side, so my problem is that sometimes it receives 140 packets, sometimes 130, 147, 148 etc and the file is always corrupted. What am I doing wrong?</p> <hr> <p>Here is the other side:</p> <pre><code>case PACKET_FILE: { if (isOpen == false) { isOpen = true; file.open("tester.pdf", ios::binary | ios::out | ios::app); file.write(pack.data, sizeof(pack.data)); } else { if (pack.eof == true) { file.write(pack.data, sizeof(pack.data)); file.close(); MessageBox(NULL, "File Received", "LOL", MB_OK); break; } file.write(pack.data, sizeof(pack.data)); } countz++; char bue[10]; itoa(countz, bue, 10); SendMessage(hlabelPackets, WM_SETTEXT, NULL, (LPARAM)(bue)); break; } </code></pre> <p>Please help, it makes no sense...</p>
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