IPPORT_ECHO
sin->sin_port = IPPORT_ECHO; /* port shouldn't be 0 */
sin6->sin6_port = IPPORT_ECHO; /* port shouldn't be 0 */
{ IPPORT_ECHO, "ECHO" },
{ IPPORT_ECHO, "ECHO" },
sin->sin_port = IPPORT_ECHO; /* port shouldn't be 0 */
sin6->sin6_port = IPPORT_ECHO; /* port shouldn't be 0 */
addr.sin_port = htons(IPPORT_ECHO);
if ((p == IPPORT_ECHO) ||