Linux Network Programming: The basic implementation of select programming ideas

First, open the network communication port, choose the TCP protocol

LISTENFD = socket (af_inet,sock_stream,0);

Second, initialize the SERVADDR, and make the network byte sequence conversion

Bzero (&servaddr,sizeof (SERVADDR));

servaddr.sin_family = af_inet;

SERVADDR.SIN_ADDR.S_ADDR = htonl (Inaddr_any);

Servaddr.sin_port = htons (Serv_port);

Third, bind IP and port

Bind (LISTENFD, (struct sockaddr *) &servaddr,sizeof (SERVADDR));

Iv. setting the number of monitoring links

Listen (listenfd,20);

V. Initialize CLIENT[I] to record the file descriptor returned by accept

for (i = 0; i < fd_setsize; i++)

Client[i] =–1;

Vi. Constructing Select monitoring file descriptor set

Fd_zero (&allset);

Fd_set (Listenfd,&allset);

Seven, cyclic blocking listener file descriptor

while (1) {

1. The Select Monitor signal set is newly set in each cycle, and the number of file descriptors ready to be returned by select

RSet = Allset;

Nready = select (Maxfd+1,&rset,null,null,null);

2. Determine whether the file description character Listenfd 1, if yes, process the new link request

if (Fd_isset (Listenfd,&rset)) {

}

3. If not, test which clients has data ready

for (i = 0; I <= maxi; i++) {

}

}

Linux Network Programming: The basic implementation of select programming ideas