How do I implement a client-server model using C++ sockets?

How do I implement a client-server model using C++ sockets?

To implement a client-server model in C++, you'll need to use the socket API. First, create a socket using socket(), then bind it to an address with bind(), and listen for connections using listen(). The server accepts connections with accept(), while the client connects using connect(). Would you like a code example?

Yes, please provide a simple code example for both the client and server.

Sure! Here's a basic example:

Server:

#include <iostream>
#include <sys/socket.h>
#include <netinet/in.h>
#include <unistd.h>

int main() {
    int server_fd = socket(AF_INET, SOCK_STREAM, 0);
    struct sockaddr_in address;
    address.sin_family = AF_INET;
    address.sin_addr.s_addr = INADDR_ANY;
    address.sin_port = htons(8080);
    bind(server_fd, (struct sockaddr *)&address, sizeof(address));
    listen(server_fd, 3);
    int new_socket = accept(server_fd, NULL, NULL);
    // Handle communication
    close(new_socket);
    close(server_fd);
}

Client:

#include <iostream>
#include <sys/socket.h>
#include <netinet/in.h>
#include <unistd.h>

int main() {
    int sock = socket(AF_INET, SOCK_STREAM, 0);
    struct sockaddr_in serv_addr;
    serv_addr.sin_family = AF_INET;
    serv_addr.sin_port = htons(8080);
    connect(sock, (struct sockaddr *)&serv_addr, sizeof(serv_addr));
    // Handle communication
    close(sock);
}

This is a basic setup. Would you like to know more about error handling or data transmission?

Yes, how can I handle errors in socket programming?

Error handling in socket programming is crucial. You can check the return values of functions like socket(), bind(), listen(), and accept(). If they return -1, an error occurred. Use perror() or strerror(errno) to get a description of the error. Would you like to see an example of error handling in the code?