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attacthService();

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Connect to network: select a connection protocol (TCP/UDP), domain name, port ID. The

function back to true when initialized successfully.

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connect(Protocol ptl,const char *host, int port);

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Data transmission: send data to the server when connected. Data size can be specified or

inputted directly.

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send(const char *str);

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send(void* buf,size_t len);

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Receive data: receive and save data from the server. The maximum data to receive and waiting

time can be set. The result is the character value been received.

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recv(char* buf,int maxlen,int timeout);

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Disconnect and the function back to true.

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close();

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