Note
Access to this page requires authorization. You can try signing in or changing directories.
Access to this page requires authorization. You can try changing directories.
The gethostbyname function uses the WSALookupServiceBegin function to query SVCID_INET_HOSTADDRBYNAME as the service class GUID. The host name is supplied in the lpszServiceInstanceName member in the WSAQUERYSET structure passed to the WSALookupServiceBegin function. The Ws2_32.dll specifies LUP_RETURN_BLOB and the name service provider places a HOSTENT structure in the blob (using offsets instead of pointers as described above). Name service providers should honor these other LUP_RETURN_* flags as well.
| Flag | Description |
|---|---|
| LUP_RETURN_NAME | Returns the h_name member from the HOSTENT structure in lpszServiceInstanceName. |
| LUP_RETURN_ADDR | Returns addressing information from HOSTENT in CSADDR_INFO structures, port information is defaulted to zero. Note that this routine does not resolve host names that consist of a dotted IPv4 address. |
Related topics