smtp_enter_state
smtp_enter_state(s, STATE_QUIT);
smtp_enter_state(s, STATE_HELO);
smtp_enter_state(s, STATE_QUIT);
smtp_enter_state(s, STATE_QUIT);
smtp_enter_state(s, STATE_QUIT);
smtp_enter_state(s, STATE_HELO);
static void smtp_enter_state(struct smtp_session *, int);
smtp_enter_state(s, STATE_HELO);
smtp_enter_state(s, STATE_TLS);
smtp_enter_state(s, STATE_QUIT);
smtp_enter_state(s, STATE_QUIT);
smtp_enter_state(s, STATE_HELO);
smtp_enter_state(s, STATE_AUTH_INIT);
smtp_enter_state(s, STATE_AUTH_INIT);
smtp_enter_state(s, STATE_HELO);
smtp_enter_state(s, STATE_AUTH_USERNAME);
smtp_enter_state(s, STATE_AUTH_PASSWORD);
smtp_enter_state(s, STATE_HELO);
smtp_enter_state(s, STATE_CONNECTED);
smtp_enter_state(s, STATE_HELO);
smtp_enter_state(s, STATE_QUIT);
smtp_enter_state(s, STATE_BODY);
smtp_enter_state(s, STATE_HELO);
smtp_enter_state(s, STATE_QUIT);
smtp_enter_state(s, STATE_QUIT);
smtp_enter_state(s, STATE_QUIT);
smtp_enter_state(s, STATE_QUIT);
smtp_enter_state(s, STATE_QUIT);
smtp_enter_state(s, STATE_HELO);
smtp_enter_state(s, STATE_HELO);