IRC 연결 방법 참고 - team-irc/tchatong GitHub Wiki https://dev.dwer.kr/2020/04/mysql-cc.html 소켓 통신 과정 https://velog.io/@emplam27/CS-%EA%B7%B8%EB%A6%BC%EC%9C%BC%EB%A1%9C-%EC%95%8C%EC%95%84%EB%B3%B4%EB%8A%94-%EB%84%A4%ED%8A%B8%EC%9B%8C%ED%81%AC-%EC%86%8C%EC%BC%93-%ED%94%84%EB%A1%9C%EA%B7%B8%EB%9E%98%EB%B0%8D%EA%B3%BC-Handshaking