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add sequence number

This is a discussion on add sequence number within the C Programming forums, part of the General Programming Boards category; Hello , im sending a message "teste" by udp socket, i would like to add a sequence number at teste ...

  1. #1
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    add sequence number

    Hello , im sending a message "teste" by udp socket, i would like to add a sequence number at teste like:

    teste1
    teste2
    teste3
    teste4 and so on....
    i got this peace of code:

    Code:
    #define HELLO_PORT 12345
    #define HELLO_GROUP "192.168.0.1"
    int main(int argc, char *argv[])
    {
    struct sockaddr_in addr;
    int fd;
    char *message = "teste";
    if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
    {
    perror("socket");
    exit(1);
    }
    /* set up destination address */
    memset(&addr,0,sizeof(addr));
    addr.sin_family = AF_INET;
    addr.sin_addr.s_addr = inet_addr(HELLO_GROUP);
    addr.sin_port=htons(HELLO_PORT);
    while (1)
    {
    if (sendto(fd, message, strlen(message), 0,(struct sockaddr *) &addr, sizeof(addr)) < 0)
    {
    perror("sendto");
    exit(1);
    }
    sleep(2);
    }
    }
    many thanks

  2. #2
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    Add a loop counter, and concatenate that value to your string, using sprintf() for instance. What's disturbing you?

  3. #3
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    Quote Originally Posted by root4 View Post
    Add a loop counter, and concatenate that value to your string, using sprintf() for instance. What's disturbing you?
    Im novice to c code , can you add code at code above?

  4. #4
    TEIAM - problem solved
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    Quote Originally Posted by davidx View Post
    Im novice to c code , can you add code at code above?
    People on this site are very reluctant to give out code - You have more chance if you look for the function sprintf, give it a go, and then post what you came up with if it doesn't work.

  5. #5
    and the hat of wrongness Salem's Avatar
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    > Im novice to c code , can you add code at code above?
    You're messing about with network code. You should be up to the task of creating a string with sprintf()

    But then you're just another found some code merchant

    What happens when you face the next trivial problem due to your lack of knowledge - will you be back on another forum asking for the next simple task.
    Start learning some C.
    C Programming Notes
    rags_to_riches likes this.
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
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