TCP带外数据读写-白红宇

TCP带外数据读写

阅读量：6285 次

发布时间：2019-06-22

本文共 2656 字，大约阅读时间需要 8 分钟。

#include 
     
      #include 
      
       #include 
       
        #include 
        
         #include 
         
          #include 
          
           #include 
           
            #include 
            
             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( "connection 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 
     
      #include 
      
       #include 
       
        #include 
        
         #include 
         
          #include 
          
           #include 
           
            #include 
            
             #include 
             
              #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, '\0', BUF_SIZE ); ret = recv( connfd, buffer, BUF_SIZE-1, 0 ); printf( "got %d bytes of normal data '%s'\n", ret, buffer ); memset( buffer, '\0', BUF_SIZE ); ret = recv( connfd, buffer, BUF_SIZE-1, MSG_OOB ); printf( "got %d bytes of oob data '%s'\n", ret, buffer ); memset( buffer, '\0', 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;}