Data logging

[lanman92]

I'm using C++ for my detour on sendpacket. I have my app filtering the headers on the packets, and modifying offsets in the packets, but I need a way to log them. Can anyone provide some insight on how to do this? Whenever I just generically try to get the bytes and use a << operator, it tries to convert the numbers I want into their ASCII codes. I googled but couldn't find anything besides a class on codeproject.

[tanis2000]

sprintf? not the fastest solution but it should do what you need

[lanman92]

Ehh, I'll try it. This will convert the raw bytes to text? So if the bytes are {0xF1, 0x3F}, the char* will be "F13F"?

[suicidity]

char buffer[128];
sprintf_s(buffer, "%s", BYTES);

Now you have the string.

[BoogieManTM]

char buffer[128];
sprintf_s(buffer, "%s", BYTES);

Now you have the string.

He wants the hexdecimal representation of the bytes.

You'll need to loop through BYTES, pulling off one byte at a time and converting it appropriately (or at least up to 4 bytes at a time, as %x/X expects an integer)


so it would be sprintf_s(buffer, "%X", BYTES[x]);

of course, make sure the end buffer is twice the size of BYTES.

[lanman92]

Okay, thanks. Things like this are very annoying =/

[lanman92]

Is there an easier way to convert the packet back to little-endian than converting each part of the packet one-by-one in my code?

[tanis2000]

First result in Google when searching for "c++ convert little endian" .. :-P

convert from BIG-ENDIAN to LITTLE-ENDIAN

[Shynd]

How do you propose to convert an entire packet from big endian to little endian if you don't do it piece-by-piece? Is the application supposed to automagically know which parts of the packet are 32-bit ints, which parts are 32-bit floats, and which parts are 64-bit GUIDs (or whatever), and reverse them each individually? No, you have to know the packet structure and reverse each individually, which is the only conclusion that makes any sense at all.

By the way:

char * sPacket = new char[PacketLength * 3];
for (int i = 0; i < PacketLength; i++)
    snprintf((char *)(sPacket + i * 3), 3, "%02X ", packet[i]);

printf(sPacket);
delete sPacket;

[lanman92]

Yes, I realized this after I read a little more. This should be great fun reversing all these packets...

[lanman92]

Btw, I settled on making the buffer on CDataStore public and just ripping my char* from there. It works pretty well.

[namreeb]

Btw, I settled on making the buffer on CDataStore public and just ripping my char* from there. It works pretty well.

FYI it has a Buffer() function to return a pointer to it.

[lanman92]

It didn't seem to be working right =/ So I just improvised :P

[namreeb]

With that class be sure that its assertions are being evaluated. It relies on it!

[lanman92]

I'm not really sure what that means Lol.