C++ TCP Receiver

main.cpp

#include <iostream>
#include <unistd.h>
#include <arpa/inet.h>

#include <errno.h>
#include <string.h>

#define DEF_TCP_PORT 20197

int main()
{
    int sock;
    if ((sock = socket(AF_INET, SOCK_STREAM, 0)) >= 0) {

        sockaddr_in serv_addr;
        serv_addr.sin_family = AF_INET;
        serv_addr.sin_port = htons(DEF_TCP_PORT);

        if (inet_pton(AF_INET, "127.0.0.1", &serv_addr.sin_addr) > 0)
            if (connect(sock, (sockaddr*)(&serv_addr), sizeof(serv_addr)) >= 0) {

                char buffer[65535];
                auto readSock = [&]() { memset(buffer, 0, sizeof(buffer)); return (read(sock, buffer, 65535) > 0); };

                while (readSock())
                    std::cout << buffer << std::endl; // convert Qt datatype to C-style and display
                  
                close(sock);
                return 0;
            }
    }

    std::cout << errno << " - " << strerror(errno) << std::endl;
    return -1;
}