Function dmLogInitSocket

engine/dlib/src/dlib/log.cpp:105–184

create and bind the server socket, will reuse old port if supplied handle valid

// create and bind the server socket, will reuse old port if supplied handle valid
static void dmLogInitSocket( dmSocket::Socket& server_socket )
{
    if (!dLib::IsDebugMode() || !dLib::FeaturesSupported(DM_FEATURE_BIT_SOCKET_SERVER_TCP))
        return;

    dmSocket::Result r;
    dmSocket::Address address;
    uint16_t port = 0;
    char error_msg[1024] = { 0 };

    // If the env variable DM_LOG_PORT is set we will try to use
    // that as port for the log server instead of a dynamic one.
    const char* env_log_port = getenv("DM_LOG_PORT");
    if (env_log_port != 0x0)
    {
        long t_port = strtol(env_log_port, 0, 10);
        if (t_port > 0 && t_port < UINT16_MAX)
        {
            port = t_port;
        }
    }

    if (server_socket != dmSocket::INVALID_SOCKET_HANDLE)
    {
        r = dmSocket::GetName(server_socket, &address, &port); // need to reuse the port
        if (r != dmSocket::RESULT_OK)
        {
            snprintf(error_msg, sizeof(error_msg), "Unable to retrieve socket information (%d): %s", r, dmSocket::ResultToString(r));
            goto bail;
        }

        r = dmSocket::Delete(server_socket);
        server_socket = dmSocket::INVALID_SOCKET_HANDLE;
        if (r != dmSocket::RESULT_OK)
        {
            snprintf(error_msg, sizeof(error_msg), "Unable to delete old log socket (%d): %s", r, dmSocket::ResultToString(r));
            goto bail;
        }
    }
    else
    {
        r = dmSocket::GetHostByName(DM_UNIVERSAL_BIND_ADDRESS_IPV4, &address);
        if (r != dmSocket::RESULT_OK)
        {
            snprintf(error_msg, sizeof(error_msg), "Unable to get listening address for log socket (%d): %s", r, dmSocket::ResultToString(r));
            goto bail;
        }
    }

    r = dmSocket::New(address.m_family, dmSocket::TYPE_STREAM, dmSocket::PROTOCOL_TCP, &server_socket);
    if (r != dmSocket::RESULT_OK)
    {
        snprintf(error_msg, sizeof(error_msg), "Unable to create log socket (%d): %s", r, dmSocket::ResultToString(r));
        goto bail;
    }

    dmSocket::SetReuseAddress(server_socket, true);
    r = dmSocket::Bind(server_socket, address, port);