How do I implement TCP socket programming in C++?

How do I implement TCP socket programming in C++?

To implement TCP socket programming in C++, you need to include the necessary headers and use the socket API. Would you like a code example?

Yes, please provide a simple client-server example.

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, (struct sockaddr *)NULL, NULL);
    const char *msg = "Hello from server!";
    send(new_socket, msg, strlen(msg), 0);
    close(new_socket);
    return 0;
}

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));
    char buffer[1024] = {0};
    read(sock, buffer, 1024);
    std::cout << buffer << std::endl;
    close(sock);
    return 0;
}

Would you like to know more about any specific part?

What are the common errors I might encounter?

Common errors include:

1. Socket creation failure: Check if the socket is created successfully.
2. Binding issues: Ensure the port is not already in use.
3. Connection failures: Verify the server is running and reachable.
4. Data transmission errors: Handle cases where data might not be sent or received properly.