Converting a struct members to a string, c newbie!

This is a discussion on Converting a struct members to a string, c newbie! within the C Programming forums, part of the General Programming Boards category; Hi there. I am trying to make a client for use with an sntp server. The idea is that I ...

  1. #1
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    Converting a struct members to a string, c newbie!

    Hi there.

    I am trying to make a client for use with an sntp server.

    The idea is that I send a datagram via the udp socket system to the server containing the current computer time and it responds with the accurate time which I can then compare and update the clock as necessary.

    So, I have a struct that creates bitfields in order to build the required packet:

    Code:
    struct {
    int mode:3;
    long long timestamp:64;
    } message
    Obviously there are many more fields.

    Now I want to send that using the usual socket send command. However, the send command takes a string as the thing to be sent.

    So how do I take each member of the struct, convert it to a string and build up the total string that I need to send, ie put all of the struct memebrs into one long string?

    I am new to C and finding it very difficult so any help would be much appreciated!

    Thanks in advance

    Daniel

  2. #2
    End Of Line Hammer's Avatar
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    >>However, the send command takes a string as the thing to be sent.<<
    Are you talking about the send() function? If so, you can do this if you want to send the struct itself:

    send(socket, &mystruct, sizeof(mystruct), 0);

    But its going to depend on what the server is expecting to receive.
    When all else fails, read the instructions.
    If you're posting code, use code tags: [code] /* insert code here */ [/code]

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