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非阻塞recvfrom的设置

快乐小码农 2022-05-19 阅读 54


int iMode = 1; //0:阻塞
ioctlsocket(socketc,FIONBIO, (u_long FAR*) &iMode);//非阻塞设置
rs=recvfrom(socketc,rbuf,sizeof(rbuf),0,(SOCKADDR*)&addr,&len);

​​int ioctlsocket (

SOCKET s,
long cmd,
u_long FAR* argp
);

​​


s

[in] A descriptor identifying a socket.


cmd

[in] The command to perform on the socket s.


argp

[in/out] A pointer to a parameter for cmd.
​​



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