SNMP_PORT
servname = SNMP_PORT;
if (host("0.0.0.0", SNMP_PORT, AF_INET, SOCK_DGRAM,
if (host("::", SNMP_PORT, AF_INET6, SOCK_DGRAM, &ss, 1) != 1)
port = SNMP_PORT;
else if (ISPORT(SNMP_PORT) || ISPORT(SNMPTRAP_PORT))