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 #define BUFSIZ  2048\r
  11 \r
  12 // === PROTOTYPES ===\r
  13  int    main(int argc, char *argv[], char *envp[]);\r
  14  int    OpenTCP(const char *AddressString, short PortNumber);\r
  15 \r
  16 // ==== CODE ====\r
  17 int main(int argc, char *argv[], char *envp[])\r
  18 {\r
  19          int    server_fd, rv;\r
  20          int    client_running = 1;\r
  21          int    bUseReadline = !!argv[3];       // HACK: If third argument is present, use ReadLine\r
  22         tReadline       *readline_info;\r
  23          int    port;\r
  24         \r
  25         if( argc < 2 || argc > 3 ) {\r
  26                 fprintf(stderr, "Usage: telnet <host> [<port>]\n Port defaults to 23\n");\r
  27                 return 0;\r
  28         }\r
  29         \r
  30         if(argc == 3)\r
  31                 port = atoi(argv[2]);\r
  32         else\r
  33                 port = 23;\r
  34         \r
  35         // Connect to the remove server\r
  36         server_fd = OpenTCP( argv[1], port );\r
  37         if( server_fd == -1 ) {\r
  38                 fprintf(stderr, "Unable to create socket\n");\r
  39                 return -1;\r
  40         }\r
  41         \r
  42         // Create a ReadLine instance with no history\r
  43         readline_info = Readline_Init(0);\r
  44         \r
  45         while( client_running )\r
  46         {\r
  47                 fd_set  fds;\r
  48                 fd_set  err_fds;\r
  49                 char    buffer[BUFSIZ];\r
  50                  int    len;\r
  51                 \r
  52                 // Prepare FD sets\r
  53                 FD_ZERO(&fds);  FD_ZERO(&err_fds);\r
  54                 FD_SET(0, &fds);        FD_SET(0, &err_fds);\r
  55                 FD_SET(server_fd, &fds);        FD_SET(server_fd, &err_fds);\r
  56                 \r
  57                 // Wait for data (no timeout)\r
  58                 rv = select(server_fd+1, &fds, NULL, &err_fds, NULL);\r
  59                 if( rv < 0 )    break;\r
  60                 \r
  61                 // Check for remote data avaliable\r
  62                 if( FD_ISSET(server_fd, &fds) )\r
  63                 {\r
  64                         // Read from server, and write to stdout\r
  65                         do\r
  66                         {\r
  67                                 len = read(server_fd, buffer, BUFSIZ);\r
  68                                 write(1, buffer, len);\r
  69                         } while( len == BUFSIZ );\r
  70                 }\r
  71                 \r
  72                 // Check for local data input\r
  73                 if( FD_ISSET(0, &fds) )\r
  74                 {\r
  75                         // Read from stdin, and write to server\r
  76                         if( bUseReadline )\r
  77                         {\r
  78                                 char    *line = Readline_NonBlock(readline_info);\r
  79                                 if( line )\r
  80                                 {\r
  81                                         write(server_fd, line, strlen(line));\r
  82                                         write(server_fd, "\n", 1);\r
  83                                 }\r
  84                         }\r
  85                         else\r
  86                         {\r
  87                                 do\r
  88                                 {\r
  89                                         len = read(0, buffer, BUFSIZ);\r
  90                                         write(server_fd, buffer, len);\r
  91                                         write(1, buffer, len);\r
  92                                 } while( len == BUFSIZ );\r
  93                         }\r
  94                 }\r
  95                 \r
  96                 // If there was an error, quit\r
  97                 if( FD_ISSET(server_fd, &err_fds) )\r
  98                 {\r
  99                         printf("\nRemote connection lost\n");\r
 100                         break ;\r
 101                 }\r
 102         }\r
 103         \r
 104         close(server_fd);\r
 105         return 0;\r
 106 }\r
 107 \r
 108 /**\r
 109  * \brief Initialise a TCP connection to \a AddressString on port \a PortNumber\r
 110  */\r
 111 int OpenTCP(const char *AddressString, short PortNumber)\r
 112 {\r
 113          int    fd, addrType;\r
 114         uint8_t addrBuffer[16];\r
 115         \r
 116         // Parse IP Address\r
 117         addrType = Net_ParseAddress(AddressString, addrBuffer);\r
 118         if( addrType == 0 ) {\r
 119                 fprintf(stderr, "Unable to parse '%s' as an IP address\n", AddressString);\r
 120                 return -1;\r
 121         }\r
 122 \r
 123         // Opens a R/W handle\r
 124         fd = Net_OpenSocket(addrType, addrBuffer, "tcpc");\r
 125         if( fd == -1 )\r
 126         {\r
 127                 fprintf(stderr, "Unable to open TCP Client\n");\r
 128                 return -1;\r
 129         }\r
 130         \r
 131         // Set remote port and address\r
 132         ioctl(fd, 5, &PortNumber);\r
 133         ioctl(fd, 6, addrBuffer);\r
 134         \r
 135         // Connect\r
 136         if( ioctl(fd, 7, NULL) == 0 ) {\r
 137                 fprintf(stderr, "Unable to start connection\n");\r
 138                 return -1;\r
 139         }\r
 140         \r
 141         printf("Connection opened\n");\r
 142         \r
 143         // Return descriptor\r
 144         return fd;\r
 145 }\r
 146 \r