printing/print_cups.c from 2.0.6

diff --git a/source/printing/print_cups.c b/source/printing/print_cups.c
new file mode 100644 (file)
index 0000000..fff135e
--- /dev/null
+++ b/source/printing/print_cups.c
@@ -0,0 +1,206 @@
+/*
+ * Support code for the Common UNIX Printing System ("CUPS")
+ *
+ * Copyright 1999 by Easy Software Products
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include "includes.h"
+#include "smb.h"
+
+#ifdef HAVE_LIBCUPS
+#include <cups/cups.h>
+#include <cups/language.h>
+
+extern int DEBUGLEVEL;
+
+
+/*
+ * 'cups_printer_fn()' - Call a function for every printer known to the
+ *                       system.
+ */
+
+void cups_printer_fn(void (*fn)(char *, char *))
+{
+       http_t          *http;          /* HTTP connection to server */
+       ipp_t           *request,       /* IPP Request */
+                       *response;      /* IPP Response */
+       ipp_attribute_t *attr;          /* Current attribute */
+       cups_lang_t     *language;      /* Default language */
+       char            *name,          /* printer-name attribute */
+                       *make_model;    /* make_model attribute */
+
+
+       /*
+       * Try to connect to the server...
+       */
+
+       if ((http = httpConnect(cupsServer(), ippPort())) == NULL)
+               return;
+
+       /*
+       * Build a CUPS_GET_PRINTERS request, which requires the following
+       * attributes:
+       *
+       *    attributes-charset
+       *    attributes-natural-language
+       */
+
+       request = ippNew();
+
+       request->request.op.operation_id = CUPS_GET_PRINTERS;
+       request->request.op.request_id   = 1;
+
+       language = cupsLangDefault();
+
+       ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_CHARSET,
+                     "attributes-charset", NULL, cupsLangEncoding(language));
+
+       ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_LANGUAGE,
+                     "attributes-natural-language", NULL, language->language);
+
+       /*
+       * Do the request and get back a response...
+       */
+
+       if ((response = cupsDoRequest(http, request, "/")) == NULL)
+       {
+               httpClose(http);
+               return;
+       }
+
+       for (attr = response->attrs; attr != NULL;)
+       {
+              /*
+               * Skip leading attributes until we hit a printer...
+               */
+
+               while (attr != NULL && attr->group_tag != IPP_TAG_PRINTER)
+                       attr = attr->next;
+
+               if (attr == NULL)
+                       break;
+
+              /*
+               * Pull the needed attributes from this printer...
+               */
+
+               name       = NULL;
+               make_model = NULL;
+
+               while (attr != NULL && attr->group_tag == IPP_TAG_PRINTER)
+               {
+                       if (strcmp(attr->name, "printer-name") == 0 &&
+                           attr->value_tag == IPP_TAG_NAME)
+                               name = attr->values[0].string.text;
+
+                       if (strcmp(attr->name, "printer-make-and-model") == 0 &&
+                           attr->value_tag == IPP_TAG_TEXT)
+                               make_model = attr->values[0].string.text;
+
+                       attr = attr->next;
+               }
+
+              /*
+               * See if we have everything needed...
+               */
+
+               if (name == NULL)
+                       break;
+
+               (*fn)(name, make_model);
+       }
+
+       ippDelete(response);
+       httpClose(http);
+}
+
+
+/*
+ * provide the equivalent of pcap_printername_ok() for SVID/XPG4 conforming
+ * systems.
+ */
+int cups_printername_ok(char *name)
+{
+       http_t          *http;          /* HTTP connection to server */
+       ipp_t           *request,       /* IPP Request */
+                       *response;      /* IPP Response */
+       ipp_attribute_t *attr;          /* Current attribute */
+       cups_lang_t     *language;      /* Default language */
+       char            uri[HTTP_MAX_URI]; /* printer-uri attribute */
+
+       /*
+       * Try to connect to the server...
+       */
+
+       if ((http = httpConnect(cupsServer(), ippPort())) == NULL)
+               return (0);
+
+       /*
+       * Build a IPP_GET_PRINTER_ATTRS request, which requires the following
+       * attributes:
+       *
+       *    attributes-charset
+       *    attributes-natural-language
+       *    printer-uri
+       */
+
+       request = ippNew();
+
+       request->request.op.operation_id = IPP_GET_PRINTER_ATTRIBUTES;
+       request->request.op.request_id   = 1;
+
+       language = cupsLangDefault();
+
+       ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_CHARSET,
+                     "attributes-charset", NULL, cupsLangEncoding(language));
+
+       ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_LANGUAGE,
+                     "attributes-natural-language", NULL, language->language);
+
+       snprintf(uri, sizeof(uri), "ipp://localhost/printers/%s", name);
+
+       ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_URI,
+                     "printer-uri", NULL, uri);
+
+       /*
+       * Do the request and get back a response...
+       */
+
+       if ((response = cupsDoRequest(http, request, "/")) == NULL)
+       {
+               httpClose(http);
+               return (0);
+       }
+
+       httpClose(http);
+
+       if (response->request.status.status_code >= IPP_OK_CONFLICT)
+       {
+               ippDelete(response);
+               return (0);
+       }
+       else
+       {
+               ippDelete(response);
+               return (1);
+       }
+}
+
+#else
+ /* this keeps fussy compilers happy */
+ void print_cups_dummy(void) {}
+#endif /* HAVE_LIBCUPS */