Usermode/Applications/telnet_src/main.c

   1 /*\r
   2  AcessOS Test Network Application\r
   3 */\r
   4 #include <acess/sys.h>\r
   5 #include <stdio.h>\r
   6 #include <net.h>\r
   7 #include <readline.h>\r
   8 #include <string.h>\r
   9 \r
  10 // === PROTOTYPES ===\r
  11  int    main(int argc, char *argv[], char *envp[]);\r
  12  int    OpenTCP(const char *AddressString, short PortNumber);\r
  13 \r
  14 // ==== CODE ====\r
  15 int main(int argc, char *argv[], char *envp[])\r
  16 {\r
  17          int    server_fd, rv;\r
  18          int    client_running = 1;\r
  19          int    bUseReadline = !!argv[3];       // HACK: If third argument is present, use ReadLine\r
  20         tReadline       *readline_info;\r
  21          int    port;\r
  22         \r
  23         if( argc < 2 || argc > 3 ) {\r
  24                 fprintf(stderr, "Usage: telnet <host> [<port>]\n Port defaults to 23\n");\r
  25                 return 0;\r
  26         }\r
  27         \r
  28         if(argc == 3)\r
  29                 port = atoi(argv[2]);\r
  30         else\r
  31                 port = 23;\r
  32         \r
  33         // Connect to the remove server\r
  34         server_fd = OpenTCP( argv[1], port );\r
  35         if( server_fd == -1 ) {\r
  36                 fprintf(stderr, "Unable to create socket\n");\r
  37                 return -1;\r
  38         }\r
  39         \r
  40         // Create a ReadLine instance with no history\r
  41         readline_info = Readline_Init(0);\r
  42         \r
  43         while( client_running )\r
  44         {\r
  45                 fd_set  fds;\r
  46                 fd_set  err_fds;\r
  47                 char    buffer[BUFSIZ];\r
  48                  int    len;\r
  49                 \r
  50                 // Prepare FD sets\r
  51                 FD_ZERO(&fds);  FD_ZERO(&err_fds);\r
  52                 FD_SET(0, &fds);        FD_SET(0, &err_fds);\r
  53                 FD_SET(server_fd, &fds);        FD_SET(server_fd, &err_fds);\r
  54                 \r
  55                 // Wait for data (no timeout)\r
  56                 rv = select(server_fd+1, &fds, NULL, &err_fds, NULL);\r
  57                 if( rv < 0 )    break;\r
  58                 \r
  59                 // Check for remote data avaliable\r
  60                 if( FD_ISSET(server_fd, &fds) )\r
  61                 {\r
  62                         // Read from server, and write to stdout\r
  63                         do\r
  64                         {\r
  65                                 len = _SysRead(server_fd, buffer, BUFSIZ);\r
  66                                 _SysWrite(1, buffer, len);\r
  67                         } while( len == BUFSIZ );\r
  68                 }\r
  69                 \r
  70                 // Check for local data input\r
  71                 if( FD_ISSET(0, &fds) )\r
  72                 {\r
  73                         // Read from stdin, and write to server\r
  74                         if( bUseReadline )\r
  75                         {\r
  76                                 char    *line = Readline_NonBlock(readline_info);\r
  77                                 if( line )\r
  78                                 {\r
  79                                         _SysWrite(server_fd, line, strlen(line));\r
  80                                         _SysWrite(server_fd, "\n", 1);\r
  81                                 }\r
  82                         }\r
  83                         else\r
  84                         {\r
  85                                 do\r
  86                                 {\r
  87                                         len = _SysRead(0, buffer, BUFSIZ);\r
  88                                         _SysWrite(server_fd, buffer, len);\r
  89                                         _SysWrite(1, buffer, len);\r
  90                                 } while( len == BUFSIZ );\r
  91                         }\r
  92                 }\r
  93                 \r
  94                 // If there was an error, quit\r
  95                 if( FD_ISSET(server_fd, &err_fds) )\r
  96                 {\r
  97                         printf("\nRemote connection lost\n");\r
  98                         break ;\r
  99                 }\r
 100         }\r
 101         \r
 102         _SysClose(server_fd);\r
 103         return 0;\r
 104 }\r
 105 \r
 106 /**\r
 107  * \brief Initialise a TCP connection to \a AddressString on port \a PortNumber\r
 108  */\r
 109 int OpenTCP(const char *AddressString, short PortNumber)\r
 110 {\r
 111          int    fd, addrType;\r
 112         uint8_t addrBuffer[16];\r
 113         \r
 114         // Parse IP Address\r
 115         addrType = Net_ParseAddress(AddressString, addrBuffer);\r
 116         if( addrType == 0 ) {\r
 117                 fprintf(stderr, "Unable to parse '%s' as an IP address\n", AddressString);\r
 118                 return -1;\r
 119         }\r
 120 \r
 121         // Opens a R/W handle\r
 122         fd = Net_OpenSocket(addrType, addrBuffer, "tcpc");\r
 123         if( fd == -1 )\r
 124         {\r
 125                 fprintf(stderr, "Unable to open TCP Client\n");\r
 126                 return -1;\r
 127         }\r
 128         \r
 129         // Set remote port and address\r
 130         _SysIOCtl(fd, 5, &PortNumber);\r
 131         _SysIOCtl(fd, 6, addrBuffer);\r
 132         \r
 133         // Connect\r
 134         if( _SysIOCtl(fd, 7, NULL) == 0 ) {\r
 135                 fprintf(stderr, "Unable to start connection\n");\r
 136                 return -1;\r
 137         }\r
 138         \r
 139         printf("Connection opened\n");\r
 140         \r
 141         // Return descriptor\r
 142         return fd;\r
 143 }\r
 144 \r