Hands-On System Programming with C++

The client logic

The client logic for this example is a combination of the debug examples in previous chapters (which we have been building upon) and the previous TCP example.

We start by defining the debug level and enable macros, as with previous examples:

#ifdef DEBUG_LEVELconstexpr auto g_debug_level = DEBUG_LEVEL;#elseconstexpr auto g_debug_level = 0;#endif#ifdef NDEBUGconstexpr auto g_ndebug = true;#elseconstexpr auto g_ndebug = false;#endif

The client class is identical to the client class in the previous TCP example:

class myclient{    int m_fd{};    struct sockaddr_in m_addr{};public:    explicit myclient(uint16_t port)    {        if (m_fd = ::socket(AF_INET, SOCK_STREAM, 0); m_fd == -1) {            throw std::runtime_error(strerror(errno));        } m_addr.sin_family ...