| Value | Meaning |
|---|---|
| NI_MAXHOST1025 | |
| NI_MAXSERV32 | |
| NI_NUMERICHOST1 | Don't try to look up hostname. |
| NI_NUMERICSERV2 | Don't convert port number to name. |
| NI_NOFQDN4 | Only return nodename portion. |
| NI_NAMEREQD8 | Don't return numeric addresses. |
| NI_DGRAM16 | Look up UDP service rather than TCP. |