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  1. #include <iostream>
  2. #include <stdio.h>
  3. #include <stdlib.h>
  4. #include <sys/types.h>
  5. #include <sys/socket.h>
  6. #include <netinet/in.h>
  7. #include <arpa/inet.h>
  8. #include <unistd.h>
  9. #include <memory.h>
  10. #include <string.h>
  11. #include <errno.h>
  12. #include <sys/errno.h>
  13.  
  14.  
  15. const int MAXSTR=9024;      // Maximum String length
  16. const long PORTNUM=8070;   // The "Well-known" port number
  17.  
  18. void handleRequest(int);    // Function to handle clients' request(s)
  19. using namespace::std;
  20. main( int argc, char *argv[])
  21. {
  22.     int portNumber;
  23.     //char executableName[MAXSTR];
  24.     //struct sigaction action;
  25.  
  26.     // Validate and read from the command line
  27.     if ( (argc != 3) && (argc != 1) )
  28.     {  
  29.         cerr << "Invalid command line.\n";
  30.         exit(1);
  31.     }
  32.     if ( argc == 1 )
  33.     {
  34.         portNumber = PORTNUM;                                                                                                                                  
  35.     }
  36.     else                                                                                                                                                       
  37.     {  
  38.         if (!strcmp(argv[1],"-p"))
  39.         {  
  40.             portNumber = atoi(argv[2]);
  41.         }
  42.         else
  43.         {  
  44.             cerr << "Invalid command line.\n";
  45.             exit(1);
  46.         }
  47.     }
  48.  
  49.  
  50.     int sockfd,newsockfd,clilen,childpid;
  51.     struct sockaddr_in serv_addr,cli_addr;
  52.  
  53.     // Create a new TCP socket...
  54.     if ((sockfd = socket(AF_INET,SOCK_STREAM,0)) < 0)
  55.     {  
  56.         cerr << "Cant open stream socket.\n";
  57.         exit(0);
  58.     }
  59.  
  60.     bzero((char *)&serv_addr,sizeof(serv_addr)) ;
  61.  
  62.     serv_addr.sin_family = AF_INET;
  63.     serv_addr.sin_addr.s_addr = htonl(INADDR_ANY);
  64.     serv_addr.sin_port = htons(portNumber);
  65.     serv_addr.sin_port = htons(portNumber);                                                                                                                    
  66.  
  67.     // Bind the socket to the server's ( this process ) address.
  68.     if (bind(sockfd,(struct sockaddr *)&serv_addr,sizeof(serv_addr)) < 0)
  69.     {  
  70.         cerr << "Cant bind local address.\n";
  71.         exit(1);
  72.     }
  73.  
  74.     // Listen for connections in this socket
  75.     listen(sockfd,5);
  76.     int status;
  77.     cerr <<  " Connected to port : " << portNumber << "\n";
  78.  
  79.     char buf[MAXSTR],ack[MAXSTR];
  80.  
  81.     // repeat forever..
  82.     while (1)
  83.     {  
  84.         clilen = sizeof(cli_addr);
  85.         // Accept a client's request, and get the client's address info into the local variable cli_addr.
  86.         newsockfd = accept(sockfd,(struct sockaddr *)&cli_addr,(socklen_t *)&clilen);
  87.         // After accepting the connection, all transaction with this client would happen with the new socket descriptor - newsockfd.
  88.  
  89.         if ((newsockfd < 0) &&  (errno != EINTR))
  90.             cerr << " server : accept error.\n";
  91.         else if (newsockfd > 0)
  92.         {  
  93.             handleRequest(newsockfd);
  94.             close(newsockfd);
  95.         }
  96.         newsockfd = NULL;
  97.     }
  98.  
  99. }
  100. void handleRequest(int newsockfd)
  101. {
  102.     char buf[MAXSTR],execName[MAXSTR],ack[MAXSTR];
  103.     char data[MAXSTR];
  104.     static int count = 1;
  105.     int check_read = 0;
  106.  
  107.     // Read from the socket, for the password and the requested command.
  108.     check_read = read(newsockfd,buf,strlen(buf));
  109.     sscanf(buf,"%s",execName);
  110.     write(newsockfd,buf,strlen(buf));
  111.  
  112.     cout << "====================================================" << endl;
  113.     cout << "\e[1;36mcounts:\e[31m " << count++ << "\e[m" << endl;
  114.     cout << "\e[1;36mCheck Read:\e[31m " << check_read << "\e[m" << endl << endl;
  115.     cout << "\e[1;36mstrlen(execName):\e[31m " << strlen(execName) << "\e[m" << endl;
  116.     cout << "\e[1;36mexecName:\e[31m " << execName << "\e[m" << endl;
  117.     cout << "\e[1;36mstrlen(buf):\e[31m " << strlen(buf) << "\e[m" << endl;
  118.     cout << "\e[1;36mbuf:\e[31m " << buf << "\e[m" << endl;
  119.     cout << "====================================================" << endl;
  120.  
  121. }
Time limit exceeded #stdin #stdout 5s 2724KB
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https://ideone.com/i4qpk
language:
C++ (gcc 8.3)
created:
13 years ago
visibility:
public

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