TCP out-of-band data read and write

#include <sys/socket.h> #include <netinet/in.h> #include <arpa/inet.h> #include <assert.h># Include <stdio.h> #include <unistd.h> #include <string.h> #include <stdlib.h>int main (int argc,        char* argv[]) {if (argc <= 2) {printf ("Usage:%s ip_address port_number\n", basename (Argv[0]));    return 1;    } const char* IP = argv[1];    int port = atoi (argv[2]);    struct sockaddr_in server_address;    Bzero (&server_address, sizeof (server_address));    server_address.sin_family = af_inet;    Inet_pton (Af_inet, IP, &server_address.sin_addr);    Server_address.sin_port = htons (port);    int SOCKFD = socket (pf_inet, sock_stream, 0);    ASSERT (sockfd >= 0); if (Connect (sockfd, struct sockaddr*) &server_address, sizeof (server_address)) < 0) {printf ("Co    Nnection failed\n ");        } else {printf ("Send OOB data out\n");        Const char* Oob_data = "abc";Const char* Normal_data = "123";        Send (SOCKFD, Normal_data, strlen (Normal_data), 0);        Send (SOCKFD, Oob_data, strlen (oob_data), Msg_oob);    Send (SOCKFD, Normal_data, strlen (Normal_data), 0);    } close (SOCKFD); return 0;}

 

#include <sys/socket.h> #include <netinet/in.h> #include <arpa/inet.h> #include <assert.h># Include <stdio.h> #include <unistd.h> #include <stdlib.h> #include <errno.h> #include < String.h> #define BUF_SIZE 1024int Main (int argc, char* argv[]) {if (argc <= 2) {printf ("Usage:%s        IP_Address port_number\n ", basename (Argv[0]));    return 1;    } const char* IP = argv[1];    int port = atoi (argv[2]);    struct SOCKADDR_IN address;    Bzero (&address, sizeof (address));    address.sin_family = af_inet;    Inet_pton (Af_inet, IP, &address.sin_addr);    Address.sin_port = htons (port);    int sock = socket (pf_inet, sock_stream, 0);    ASSERT (sock >= 0);    int ret = bind (sock, (struct sockaddr*) &address, sizeof (address));    ASSERT (Ret! =-1);    RET = Listen (sock, 5);    ASSERT (Ret! =-1);    struct SOCKADDR_IN client;    socklen_t client_addrlength = sizeof (client); int CONNFD = Accept (sock, (struct sockaddr*) &client, &client_addrlength);    if (CONNFD < 0) {printf ("errno is:%d\n", errno);        } else {char buffer[buf_size];        memset (buffer, ' n ', buf_size);        ret = recv (connfd, buffer, buf_size-1, 0);        printf ("Got%d bytes of normal data '%s ' \ n", ret, buffer);        memset (buffer, ' n ', buf_size);        ret = recv (connfd, buffer, buf_size-1, Msg_oob);        printf ("Got%d bytes of OOB data '%s ' \ n", ret, buffer);        memset (buffer, ' n ', buf_size);        ret = recv (connfd, buffer, buf_size-1, 0);        printf ("Got%d bytes of normal data '%s ' \ n", ret, buffer);    Close (CONNFD);    } close (sock); return 0;}

　　

TCP out-of-band data read and write