recving gibberish...

This is a discussion on recving gibberish... within the Networking/Device Communication forums, part of the General Programming Boards category; I posted this question on GameDev, the threads been going on for 20 posts or so and I still couldn't ...

  1. #1
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    recving gibberish...

    I posted this question on GameDev, the threads been going on for 20 posts or so and I still couldn't get it fixed...

    It's my first time using async sockets
    I'm writing a game and I'm trying to make it send a message whenever the opponent moves
    I hardcoded it to send "mma" for debugging purposes and I'm recving the "mma"'s but once in a while, I get these strings of random(ish) chars within the "mma" string

    Screen shot
    the top right window is the data I'm recving
    I put a putchar('\n'); after each recv call

    I'm outputing the data right after I recv it so I know it's got nothing to do with not processing it properly
    It seems to have something to do with the recvbuffer's size

    What happens if the data received is larger than your buffer?
    Does recv stop recving once it encounters a \0?

    [edit]I just counted the chars, I get the D-" every 255th char and the recvbuffer is an array of 256 chars[/edit]
    Last edited by h_howee; 09-17-2007 at 01:11 PM.

    OS: Windows 7, XUbuntu 11.10, Arch Linux
    IDE: CodeBlocks
    Compiler: GCC

  2. #2
    Sweet
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    What does your recv code look like?

  3. #3
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    Code:
        char temprecv[256] = {0};
        int BytesSent;
    
            case FD_READ:
            {
                if (recv(wParam, temprecv, sizeof(temprecv), 0) == 0)
                {
                    std::cout<<"You opponent has left the game."<<std::endl;
                    PostQuitMessage(0);
                }
                std::cout<<temprecv<<std::endl;
                std::string a(temprecv);
                for (int i = 0; i < a.size(); i++)
                {
                    RecvBuffer.push_back(a[i]);
                }
                this->ProcessRecv();
                break;
            }

    OS: Windows 7, XUbuntu 11.10, Arch Linux
    IDE: CodeBlocks
    Compiler: GCC

  4. #4
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    damnit, I always find the solution right after i post here...

    Code:
            case FD_READ:
            {
                BytesSent = recv(wParam, temprecv, sizeof(temprecv), 0);
                if (BytesSent == 0)
                {
                    std::cout<<"You opponent has left the game."<<std::endl;
                    PostQuitMessage(0);
                }
                for (int i = 0; i < BytesSent; i++)
                {
                    RecvBuffer.push_back(temprecv[i]);
                }
                this->ProcessRecv();
                break;
            }

    OS: Windows 7, XUbuntu 11.10, Arch Linux
    IDE: CodeBlocks
    Compiler: GCC

  5. #5
    Sweet
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    Yep. Thats what I though the problem was also.

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