The following figure shows the flow of DNS host name resolution.Figure 6-8. DNS Resolution
Sequence
Note:
The host application requests to resolve hostname (for example, www.foobar.com), by calling the function gethostbyname.
Before calling the gethostbyname, the application must
register a DNS response callback function using the function
registerSocketCallback.
After the
ATWINC15x0 DNS_Resolver module
obtains the IP Address (hostIP) corresponding to the given HostName, the
dnsResolveCB is called with the hostIP.
If an error occurs or if the
DNS request encounters a time-out, the dnsResolveCB is
called with IP Address value zero indicating a failure to resolve the domain
name.
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