| Value | Meaning |
|---|---|
| AI_PASSIVE0x0008 | intended for bind() + listen() |
| AI_CANONNAME0x0010 | return canonical version of host |
| AI_NUMERICHOST0x0020 | use numeric node address string |
| AI_NUMERICSERV0x0040 | servname is assumed numeric |
| AI_V4MAPPED0x0001 | IPv4 mapped addresses if no IPv6 |
| AI_ALL0x0002 | IPv6 and IPv4 mapped addresses |
| AI_ADDRCONFIG0x0004 | AAAA or A records only if IPv6/IPv4 cnfg'd |
| AI_MASK(AI_PASSIVE | AI_CANONNAME | AI_NUMERICHOST | AI_NUMERICSERV | AI_ADDRCONFIG) | |
| AI_DEFAULT(AI_V4MAPPED | AI_ADDRCONFIG) |