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6a5ea92a4e
Uthernet II: add extended feature to virtualise DNS requests. . This allows pure TCP/UDP sockets to run *without* MACRAW requests (and so without libpcap). . Raw sockets will not work. . Add configuration for Virtual DNS. libpcap: ensure all functions check if the library is loaded before using it. Uthernet 1: do NOT overwrite tfe_cannot_use as it should only reflect the availability of npcap on *this* system. Add Copyright notice, and mention Virtual DNS in html.
46 lines
1.0 KiB
C++
46 lines
1.0 KiB
C++
#pragma once
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#define MAX_TXLENGTH 1518
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#define MIN_TXLENGTH 4
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#define MAX_RXLENGTH 1518
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#define MIN_RXLENGTH 64
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#pragma pack(push)
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#pragma pack(1) // Ensure struct is packed
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struct MACAddress
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{
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uint8_t address[6];
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};
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#pragma pack(pop)
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class NetworkBackend
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{
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public:
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virtual ~NetworkBackend();
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// transmit a packet
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virtual void transmit(
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const int txlength, /* Frame length */
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uint8_t *txframe /* Pointer to the frame to be transmitted */
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) = 0;
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// receive a single packet, return size (>0) or missing (-1)
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virtual int receive(
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const int size, /* Buffer size */
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uint8_t * rxframe /* Pointer to the buffer */
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) = 0;
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// process pending packets
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virtual void update(const ULONG nExecutedCycles) = 0;
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// get MAC for IPRAW (it is only supposed to handle addresses on the local network)
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virtual void getMACAddress(const uint32_t address, MACAddress & mac) = 0;
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// if the backend is usable
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virtual bool isValid() = 0;
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// get interface name
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virtual const std::string & getInterfaceName() = 0;
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};
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