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friendev EtherDune TCP/IP library
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EtherDune DNS Service. More...
#include <DNS.h>
Public Member Functions | |
| uint16_t | resolve (const char *name) |
| Resolves a host name to an IP address More... | |
Friends | |
| class | NetworkService |
EtherDune DNS Service.
Implements the basics of DNS so as to resolve hostnames to IP addresses. See DNS configuration for EtherDune config parameters that apply to DNS.
You cannot create an instance of this class. In order to use DNS in your project, access the singleton instance in net::DNS() this way:
To resolve a hostname to an IP Address, call the resolve method and save the uint16_t result as an identification token to match possible responses to your request.
To receive the reply, override the onDNSResolve virtual function on any NetworkService-derived class and match the identification to the token you received from resolve.
Most classes have this mechanism already automatically implemented, providing overloads that take a host name as opposed to an IP address.
EtherDune is designed in such a way that if you do not call net::DNS() within your code, DNS functions won't be compiled in, thus saving space.
DNS code will be compiled in if, however, you use any other function within EtherDune that in turn requires DNS to work such as HTTPClient::request, which takes in a hostname as a parameter and thus uses net::DNS() internally.
See DNSDemo.ino for a simple demonstration application that uses DNS alone.
| uint16_t DNSClient::resolve | ( | const char * | name | ) |
Resolves a host name to an IP address
| name | host name to resolve |
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friend |
1.8.9.1
