数据库引擎开发以及常见数据库内部原理学习（3）：网络编程基础

int main(void)

{

//套接字地址

struct sockaddr_instSockAddr;

//建立套接字

intSocketFD= socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);

//判断套接字是否成功

if(-1==SocketFD)

{

perror("can not create socket");

exit(EXIT_FAILURE);

}

//重置套接字地址信息

memset(&stSockAddr,0,sizeof(stSockAddr));

stSockAddr.sin_family= AF_INET;

stSockAddr.sin_port= htons(1100);

stSockAddr.sin_addr.s_addr= htonl(INADDR_ANY);

//绑定端口

if(-1== bind(SocketFD,(structsockaddr*)&stSockAddr,

sizeof(stSockAddr)))

{

perror("error bind failed");

close(SocketFD);

exit(EXIT_FAILURE);

}

//监听端口

if(-1== listen(SocketFD,10))

{

perror("error listen failed");

close(SocketFD);

exit(EXIT_FAILURE);

}

//循环

for(;;)

{

//监听连接

intConnectFD= accept(SocketFD, NULL, NULL);

if(0>ConnectFD)

{

perror("error accept failed");

close(SocketFD);

exit(EXIT_FAILURE);

}

/* perform read write operations ...

read(ConnectFD,buff,size)*/

if(-1== shutdown(ConnectFD, SHUT_RDWR))

{

perror("can not shutdown socket");

close(ConnectFD);

close(SocketFD);

exit(EXIT_FAILURE);

}

close(ConnectFD);

}

close(SocketFD);

return EXIT_SUCCESS;

}

int main(void)

{

struct sockaddr_instSockAddr;

intRes;

intSocketFD= socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);

if(-1==SocketFD)

{

perror("cannot create socket");

exit(EXIT_FAILURE);

}

memset(&stSockAddr,0,sizeof(stSockAddr));

stSockAddr.sin_family= AF_INET;

stSockAddr.sin_port= htons(1100);

Res= inet_pton(AF_INET,"192.168.1.3",&stSockAddr.sin_addr);

}

if(0>Res)

{

perror("error: first parameter is not a valid address family");

close(SocketFD);

exit(EXIT_FAILURE);

}

elseif(0==Res)

{

perror("char string (second parameter does not contain valid

ipaddress)");

close(SocketFD);

exit(EXIT_FAILURE);

}

if(-1== connect(SocketFD,(struct sockaddr*)&stSockAddr,

sizeof(stSockAddr)))

{

perror("connect failed");

close(SocketFD);

exit(EXIT_FAILURE);

}

/* perform read write operations ... */

(void) shutdown(SocketFD, SHUT_RDWR);

close(SocketFD);

return EXIT_SUCCESS;

}