backend/socket.c

   1 /*
   2  * "$Id: socket.c,v 1.13 2000/04/27 21:31:38 mike Exp $"
   3  *
   4  *   AppSocket backend for the Common UNIX Printing System (CUPS).
   5  *
   6  *   Copyright 1997-2000 by Easy Software Products, all rights reserved.
   7  *
   8  *   These coded instructions, statements, and computer programs are the
   9  *   property of Easy Software Products and are protected by Federal
  10  *   copyright law.  Distribution and use rights are outlined in the file
  11  *   "LICENSE" which should have been included with this file.  If this
  12  *   file is missing or damaged please contact Easy Software Products
  13  *   at:
  14  *
  15  *       Attn: CUPS Licensing Information
  16  *       Easy Software Products
  17  *       44141 Airport View Drive, Suite 204
  18  *       Hollywood, Maryland 20636-3111 USA
  19  *
  20  *       Voice: (301) 373-9603
  21  *       EMail: cups-info@cups.org
  22  *         WWW: http://www.cups.org
  23  *
  24  * Contents:
  25  *
  26  *   main() - Send a file to the printer or server.
  27  */
  28
  29 /*
  30  * Include necessary headers.
  31  */
  32
  33 #include <cups/cups.h>
  34 #include <stdio.h>
  35 #include <stdlib.h>
  36 #include <stdarg.h>
  37 #include <cups/string.h>
  38 #include <errno.h>
  39 #include <sys/types.h>
  40 #include <sys/stat.h>
  41 #include <signal.h>
  42
  43 #if defined(WIN32) || defined(__EMX__)
  44 #  include <winsock.h>
  45 #else
  46 #  include <sys/socket.h>
  47 #  include <netinet/in.h>
  48 #  include <arpa/inet.h>
  49 #  include <netdb.h>
  50 #endif /* WIN32 || __EMX__ */
  51
  52
  53 /*
  54  * 'main()' - Send a file to the printer or server.
  55  *
  56  * Usage:
  57  *
  58  *    printer-uri job-id user title copies options [file]
  59  */
  60
  61 int                     /* O - Exit status */
  62 main(int  argc,         /* I - Number of command-line arguments (6 or 7) */
  63      char *argv[])      /* I - Command-line arguments */
  64 {
  65   char          method[255],    /* Method in URI */
  66                 hostname[1024], /* Hostname */
  67                 username[255],  /* Username info (not used) */
  68                 resource[1024]; /* Resource info (not used) */
  69   FILE          *fp;            /* Print file */
  70   int           copies;         /* Number of copies to print */
  71   int           port;           /* Port number */
  72   int           fd;             /* AppSocket */
  73   int           error;          /* Error code (if any) */
  74   struct sockaddr_in addr;      /* Socket address */
  75   struct hostent *hostaddr;     /* Host address */
  76   int           wbytes;         /* Number of bytes written */
  77   size_t        nbytes,         /* Number of bytes read */
  78                 tbytes;         /* Total number of bytes written */
  79   char          buffer[8192],   /* Output buffer */
  80                 *bufptr;        /* Pointer into buffer */
  81   struct timeval timeout;       /* Timeout for select() */
  82   fd_set        input;          /* Input set for select() */
  83 #if defined(HAVE_SIGACTION) && !defined(HAVE_SIGSET)
  84   struct sigaction action;      /* Actions for POSIX signals */
  85 #endif /* HAVE_SIGACTION && !HAVE_SIGSET */
  86
  87
  88   if (argc == 1)
  89   {
  90     puts("network socket \"Unknown\" \"AppSocket/HP JetDirect\"");
  91     return (0);
  92   }
  93   else if (argc < 6 || argc > 7)
  94   {
  95     fprintf(stderr, "Usage: %s job-id user title copies options [file]\n",
  96             argv[0]);
  97     return (1);
  98   }
  99
 100  /*
 101   * If we have 7 arguments, print the file named on the command-line.
 102   * Otherwise, send stdin instead...
 103   */
 104
 105   if (argc == 6)
 106   {
 107     fp     = stdin;
 108     copies = 1;
 109   }
 110   else
 111   {
 112    /*
 113     * Try to open the print file...
 114     */
 115
 116     if ((fp = fopen(argv[6], "rb")) == NULL)
 117     {
 118       perror("ERROR: unable to open print file");
 119       return (1);
 120     }
 121
 122     copies = atoi(argv[4]);
 123   }
 124
 125  /*
 126   * Extract the hostname and port number from the URI...
 127   */
 128
 129   httpSeparate(argv[0], method, username, hostname, &port, resource);
 130
 131   if (port == 0)
 132     port = 9100;        /* Default to HP JetDirect/Tektronix PhaserShare */
 133
 134  /*
 135   * Then try to connect to the remote host...
 136   */
 137
 138   if ((hostaddr = gethostbyname(hostname)) == NULL)
 139   {
 140     fprintf(stderr, "ERROR: Unable to locate printer \'%s\' - %s",
 141             hostname, strerror(errno));
 142     return (1);
 143   }
 144
 145   fprintf(stderr, "INFO: Attempting to connect to host %s on port %d\n",
 146           hostname, port);
 147
 148   memset(&addr, 0, sizeof(addr));
 149   memcpy(&(addr.sin_addr), hostaddr->h_addr, hostaddr->h_length);
 150   addr.sin_family = hostaddr->h_addrtype;
 151   addr.sin_port   = htons(port);
 152
 153   while (copies > 0)
 154   {
 155     for (;;)
 156     {
 157       if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0)
 158       {
 159         perror("ERROR: Unable to create socket");
 160         return (1);
 161       }
 162
 163       if (connect(fd, (struct sockaddr *)&addr, sizeof(addr)) < 0)
 164       {
 165         error = errno;
 166         close(fd);
 167         fd = -1;
 168
 169         if (error == ECONNREFUSED)
 170         {
 171           fprintf(stderr, "INFO: Network host \'%s\' is busy; will retry in 30 seconds...\n",
 172                   hostname);
 173           sleep(30);
 174         }
 175         else
 176         {
 177           perror("ERROR: Unable to connect to printer");
 178           sleep(30);
 179         }
 180       }
 181       else
 182         break;
 183     }
 184
 185    /*
 186     * Now that we are "connected" to the port, ignore SIGTERM so that we
 187     * can finish out any page data the driver sends (e.g. to eject the
 188     * current page...
 189     */
 190
 191 #ifdef HAVE_SIGSET /* Use System V signals over POSIX to avoid bugs */
 192     sigset(SIGTERM, SIG_IGN);
 193 #elif defined(HAVE_SIGACTION)
 194     memset(&action, 0, sizeof(action));
 195
 196     sigemptyset(&action.sa_mask);
 197     action.sa_handler = SIG_IGN;
 198     sigaction(SIGTERM, &action, NULL);
 199 #else
 200     signal(SIGTERM, SIG_IGN);
 201 #endif /* HAVE_SIGSET */
 202
 203    /*
 204     * Finally, send the print file...
 205     */
 206
 207     copies --;
 208
 209     if (fp != stdin)
 210     {
 211       fputs("PAGE: 1 1\n", stderr);
 212       rewind(fp);
 213     }
 214
 215     fputs("INFO: Connected to host, sending print job...\n", stderr);
 216
 217     tbytes = 0;
 218     while ((nbytes = fread(buffer, 1, sizeof(buffer), fp)) > 0)
 219     {
 220      /*
 221       * Write the print data to the printer...
 222       */
 223
 224       tbytes += nbytes;
 225       bufptr = buffer;
 226
 227       while (nbytes > 0)
 228       {
 229         if ((wbytes = send(fd, bufptr, nbytes, 0)) < 0)
 230         {
 231           perror("ERROR: Unable to send print file to printer");
 232           break;
 233         }
 234
 235         nbytes -= wbytes;
 236         bufptr += wbytes;
 237       }
 238
 239      /*
 240       * Check for possible data coming back from the printer...
 241       */
 242
 243       timeout.tv_sec = 0;
 244       timeout.tv_usec = 0;
 245       FD_ZERO(&input);
 246       FD_SET(fd, &input);
 247       if (select(fd + 1, &input, NULL, NULL, &timeout) > 0)
 248       {
 249        /*
 250         * Grab the data coming back and spit it out to stderr...
 251         */
 252
 253         if ((nbytes = recv(fd, buffer, sizeof(buffer), 0)) > 0)
 254           fprintf(stderr, "INFO: Received %u bytes of back-channel data!\n",
 255                   nbytes);
 256       }
 257       else if (argc > 6)
 258         fprintf(stderr, "INFO: Sending print file, %u bytes...\n", tbytes);
 259     }
 260
 261    /*
 262     * Close the socket connection...
 263     */
 264
 265     close(fd);
 266   }
 267
 268  /*
 269   * Close the input file and return...
 270   */
 271
 272   if (fp != stdin)
 273     fclose(fp);
 274
 275   return (0);
 276 }
 277
 278
 279 /*
 280  * End of "$Id: socket.c,v 1.13 2000/04/27 21:31:38 mike Exp $".
 281  */