Very Computer

I've made a chat program, only the client is able to send. What I
would like to do is have the client send and receive at the same time.
Same with the server. My source code is probably not the best, but oh
well. I'm programming in Linux-Mandrake 8.0, in C.
----------------------------------------------------------
Server source:

#include <ctype.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>

#define SIZE sizeof(struct sockaddr_in)
int newsockfd;

main()
{
        int sockfd;
        struct sockaddr_in server = {AF_INET, 7000, INADDR_ANY};
        char rmessage[513], smessage[512];

        // create socket        
        if ( (sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1)
        {
                perror("socket call failed!");
                exit(1);
        }

        // bind to 7000
        if ( bind(sockfd, (struct sockaddr *)&server, SIZE) == -1)
        {
                perror("bind call failed!");
                exit(1);
        }

        // listen on all available "lines"    
        if ( listen(sockfd, 5) == -1)
        {
                perror("listen call failed!");
                exit(1);
        }

        // accept and send/recv data
        for ( ; ; )
        {
                if ( (newsockfd = accept(sockfd, NULL, NULL)) == -1)
                {
                        perror("accept call failed!");
                        exit(1);
                }

                // send/recv data
                while(recv(newsockfd, &rmessage, 512, 0) > 0)
                {                      
                        printf("%s\n", rmessage);
                } // another while loop for send?
        }

Quote:}

-------------------------------------------------------------------
client source:

#include <ctype.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>

#define SIZE sizeof(struct sockaddr_in)

main()
{
        int sockfd;
        struct sockaddr_in server = {AF_INET, 7000};
        char servip[64], smessage[1024];

        printf("Server IP: ");
        gets(servip);

        server.sin_addr.s_addr = inet_addr(servip); // server's address

        // create socket
        if ( (sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1)
        {
                perror("socket call failed");
                exit(1);
        }

        // connect to server
        if ( connect(sockfd, (struct sockaddr *)&server, SIZE) == -1)
        {
                perror("connect call failed");
                exit(1);
        }
        else
                printf("Connected to: %s\n", servip);

        // send/recv data
        for( ; ; ) // probably wrong kind of loop?
        {
                printf("Message: ");
                gets(smessage);
                send(sockfd, &smessage, 511, 0);
                close(sockfd);
        } // while loop nested inside the for? another for? while loop
outside of for?

Quote:}

----------------------------------------------------------------

as you see, my source may be a little unethical, but it works for me.
Could I please have specific code. Thank you for all your help.

Shawn Webb had nothing better to do than to say:

Quote:> I've made a chat program, only the client is able to send. What I
> would like to do is have the client send and receive at the same time.

You can't send and receive at the same time, since the calls block.
You need to use select() to enable you to detect when there is data
available to send or receive. That way, you can do only the one that
is desired at a given point in time.

man 2 select

Moshe

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Moshe Jacobson :: http://runslinux.net :: moshe at runslinux dot net