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39 lines
1.3 KiB
C++
39 lines
1.3 KiB
C++
#ifndef NETWORK_SERVER_LOOKUP_HPP__
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#define NETWORK_SERVER_LOOKUP_HPP__
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#include <tuple>
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#include <QHostAddress>
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#include <QAbstractSocket>
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class QString;
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//
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// Do a blocking DNS lookup using query as a destination host address
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// and port.
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//
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// query can be one of:
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//
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// 1) "" (empty string) - use defaults
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// 2) ":nnnnn" - override default service port with port nnnnn
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// 3) "<valid-host-name>" - override default host address with DNS lookup
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// 4) "nnn.nnn.nnn.nnn" - override default host address with the IPv4 address given by nnn.nnn.nnn.nnn
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// 5) "[<valid-IPv6-address]" - override default host address with the given IPv6 address
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// 6) "<valid-host-name>:nnnnn" - use as per (3) & (2)
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// 7) "nnn.nnn.nnn.nnn:nnnnn" - use as per (4) & (2)
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// 8) "[<valid-IPv6-address]:nnnnn" - use as per (5) & (2)
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//
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// The first host address matching the protocol and the service port
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// number are returned.
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//
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// If no suitable host address is found QHostAddress::Null will be
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// returned in the first member of the result tuple.
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//
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std::tuple<QHostAddress, quint16>
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network_server_lookup (QString query
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, quint16 default_service_port
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, QHostAddress default_host_address = QHostAddress::LocalHost
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, QAbstractSocket::NetworkLayerProtocol protocol = QAbstractSocket::AnyIPProtocol);
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#endif
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