Accept common data and out-of-band data simultaneously under Linux

#include <sys/types.h> #include <sys/socket.h> #include <netinet/in.h> #include <arpa/inet.h> #include <assert.h> #include <stdio.h> #include <unistd.h> #include <errno.h> #include <    string.h> #include <fcntl.h> #include <stdlib.h>int main () {const char *ip= "127.0.0.1";    int port=12345;    int ret=0;    struct SOCKADDR_IN address;    Bzero (&address,sizeof (address));    Address.sin_family=af_inet;    Inet_pton (AF_INET,IP,&AMP;ADDRESS.SIN_ADDR);    Address.sin_port=htons (port);    int Listenfd=socket (pf_inet,sock_stream,0);    ASSERT (listenfd>=0);    Ret=bind (LISTENFD, (struct sockaddr *) &address,sizeof (address));    ASSERT (Ret!=-1);    Ret=listen (listenfd,5);    ASSERT (Ret!=-1);    struct sockaddr_in client_address;    socklen_t client_addrlength=sizeof (client_address);    int Connfd=accept (LISTENFD, (struct sockaddr *) &client_address,&client_addrlength); if (connfd<0) {printf ("Errno is:%d\n", ERrno);    Close (LISTENFD);    } Char buf[1024];    Fd_set Read_fds;    Fd_set Exception_fds;    Fd_zero (&read_fds);    Fd_zero (&exception_fds);        while (1) {memset (buf, ' n ', sizeof (BUF));        Fd_set (Connfd,&read_fds);        Fd_set (Connfd,&exception_fds);        Ret=select (Connfd+1,&read_fds,null,&exception_fds,null);            if (ret<0) {printf ("Selection failure");        Break            } if (Fd_isset (Connfd,&read_fds)) {Ret=recv (connfd,buf,sizeof (BUF) -1,0);            if (ret<=0) {break;        } printf ("Get%d bytes of normal data:%s\n", ret,buf);            } else if (Fd_isset (Connfd,&exception_fds)) {Ret=recv (connfd,buf,sizeof (BUF) -1,msg_oob);            if (ret<=0) {break;        } printf ("Get%d bytes of Oob data:%s\n", ret,buf);    }} close (CONNFD); Close (ListeNFD); return 0;}

Accept common data and out-of-band data simultaneously under Linux