| Value | Meaning |
|---|---|
| EAI_BADFLAGS-1 | Invalid value for ai_flags field. |
| EAI_NONAME-2 | NAME or SERVICE is unknown. |
| EAI_AGAIN-3 | Temporary failure in name resolution. |
| EAI_FAIL-4 | Non-recoverable failure in name res. |
| EAI_NODATA-5 | No address associated with NAME. |
| EAI_FAMILY-6 | ai_family not supported. |
| EAI_SOCKTYPE-7 | ai_socktype not supported. |
| EAI_SERVICE-8 | SERVICE not supported for ai_socktype. |
| EAI_MEMORY-10 | Memory allocation failure. |