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