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268 lines
7.7 KiB
268 lines
7.7 KiB
4 months ago
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/*
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* cupsGetDevices implementation for CUPS.
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*
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* Copyright 2008-2016 by Apple Inc.
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*
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* Licensed under Apache License v2.0. See the file "LICENSE" for more information.
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*/
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/*
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* Include necessary headers...
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*/
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#include "cups-private.h"
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#include "debug-internal.h"
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#include "adminutil.h"
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/*
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* 'cupsGetDevices()' - Get available printer devices.
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*
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* This function sends a CUPS-Get-Devices request and streams the discovered
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* devices to the specified callback function. The "timeout" parameter controls
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* how long the request lasts, while the "include_schemes" and "exclude_schemes"
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* parameters provide comma-delimited lists of backends to include or omit from
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* the request respectively.
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*
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* This function is deprecated with the IPP printer discovery functionality
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* being provided by the @link cupsEnumDests@ and @cupsGetDests@ functions.
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*
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* @deprecated@
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*/
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ipp_status_t /* O - Request status - @code IPP_OK@ on success. */
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cupsGetDevices(
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http_t *http, /* I - Connection to server or @code CUPS_HTTP_DEFAULT@ */
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int timeout, /* I - Timeout in seconds or @code CUPS_TIMEOUT_DEFAULT@ */
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const char *include_schemes, /* I - Comma-separated URI schemes to include or @code CUPS_INCLUDE_ALL@ */
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const char *exclude_schemes, /* I - Comma-separated URI schemes to exclude or @code CUPS_EXCLUDE_NONE@ */
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cups_device_cb_t callback, /* I - Callback function */
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void *user_data) /* I - User data pointer */
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{
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ipp_t *request, /* CUPS-Get-Devices request */
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*response; /* CUPS-Get-Devices response */
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ipp_attribute_t *attr; /* Current attribute */
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const char *device_class, /* device-class value */
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*device_id, /* device-id value */
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*device_info, /* device-info value */
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*device_location, /* device-location value */
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*device_make_and_model, /* device-make-and-model value */
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*device_uri; /* device-uri value */
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int blocking; /* Current blocking-IO mode */
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cups_option_t option; /* in/exclude-schemes option */
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http_status_t status; /* HTTP status of request */
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ipp_state_t state; /* IPP response state */
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/*
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* Range check input...
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*/
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DEBUG_printf(("cupsGetDevices(http=%p, timeout=%d, include_schemes=\"%s\", exclude_schemes=\"%s\", callback=%p, user_data=%p)", (void *)http, timeout, include_schemes, exclude_schemes, (void *)callback, user_data));
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if (!callback)
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return (IPP_STATUS_ERROR_INTERNAL);
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if (!http)
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http = _cupsConnect();
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if (!http)
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return (IPP_STATUS_ERROR_SERVICE_UNAVAILABLE);
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/*
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* Create a CUPS-Get-Devices request...
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*/
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request = ippNewRequest(IPP_OP_CUPS_GET_DEVICES);
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if (timeout > 0)
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ippAddInteger(request, IPP_TAG_OPERATION, IPP_TAG_INTEGER, "timeout",
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timeout);
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if (include_schemes)
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{
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option.name = "include-schemes";
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option.value = (char *)include_schemes;
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cupsEncodeOptions2(request, 1, &option, IPP_TAG_OPERATION);
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}
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if (exclude_schemes)
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{
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option.name = "exclude-schemes";
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option.value = (char *)exclude_schemes;
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cupsEncodeOptions2(request, 1, &option, IPP_TAG_OPERATION);
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}
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/*
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* Send the request and do any necessary authentication...
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*/
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do
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{
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DEBUG_puts("2cupsGetDevices: Sending request...");
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status = cupsSendRequest(http, request, "/", ippLength(request));
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DEBUG_puts("2cupsGetDevices: Waiting for response status...");
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while (status == HTTP_STATUS_CONTINUE)
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status = httpUpdate(http);
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if (status != HTTP_STATUS_OK)
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{
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httpFlush(http);
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if (status == HTTP_STATUS_UNAUTHORIZED)
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{
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/*
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* See if we can do authentication...
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*/
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DEBUG_puts("2cupsGetDevices: Need authorization...");
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if (!cupsDoAuthentication(http, "POST", "/"))
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httpReconnect2(http, 30000, NULL);
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else
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{
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status = HTTP_STATUS_CUPS_AUTHORIZATION_CANCELED;
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break;
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}
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}
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#ifdef HAVE_SSL
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else if (status == HTTP_STATUS_UPGRADE_REQUIRED)
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{
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/*
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* Force a reconnect with encryption...
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*/
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DEBUG_puts("2cupsGetDevices: Need encryption...");
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if (!httpReconnect2(http, 30000, NULL))
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httpEncryption(http, HTTP_ENCRYPTION_REQUIRED);
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}
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#endif /* HAVE_SSL */
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}
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}
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while (status == HTTP_STATUS_UNAUTHORIZED ||
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status == HTTP_STATUS_UPGRADE_REQUIRED);
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DEBUG_printf(("2cupsGetDevices: status=%d", status));
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ippDelete(request);
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if (status != HTTP_STATUS_OK)
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{
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_cupsSetHTTPError(status);
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return (cupsLastError());
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}
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/*
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* Read the response in non-blocking mode...
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*/
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blocking = httpGetBlocking(http);
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httpBlocking(http, 0);
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response = ippNew();
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device_class = NULL;
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device_id = NULL;
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device_info = NULL;
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device_location = "";
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device_make_and_model = NULL;
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device_uri = NULL;
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attr = NULL;
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DEBUG_puts("2cupsGetDevices: Reading response...");
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do
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{
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if ((state = ippRead(http, response)) == IPP_STATE_ERROR)
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break;
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DEBUG_printf(("2cupsGetDevices: state=%d, response->last=%p", state, (void *)response->last));
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if (!response->attrs)
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continue;
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while (attr != response->last)
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{
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if (!attr)
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attr = response->attrs;
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else
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attr = attr->next;
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DEBUG_printf(("2cupsGetDevices: attr->name=\"%s\", attr->value_tag=%d",
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attr->name, attr->value_tag));
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if (!attr->name)
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{
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if (device_class && device_id && device_info && device_make_and_model &&
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device_uri)
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(*callback)(device_class, device_id, device_info,
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device_make_and_model, device_uri, device_location,
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user_data);
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device_class = NULL;
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device_id = NULL;
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device_info = NULL;
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device_location = "";
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device_make_and_model = NULL;
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device_uri = NULL;
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}
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else if (!strcmp(attr->name, "device-class") &&
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attr->value_tag == IPP_TAG_KEYWORD)
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device_class = attr->values[0].string.text;
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else if (!strcmp(attr->name, "device-id") &&
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attr->value_tag == IPP_TAG_TEXT)
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device_id = attr->values[0].string.text;
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else if (!strcmp(attr->name, "device-info") &&
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attr->value_tag == IPP_TAG_TEXT)
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device_info = attr->values[0].string.text;
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else if (!strcmp(attr->name, "device-location") &&
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attr->value_tag == IPP_TAG_TEXT)
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device_location = attr->values[0].string.text;
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else if (!strcmp(attr->name, "device-make-and-model") &&
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attr->value_tag == IPP_TAG_TEXT)
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device_make_and_model = attr->values[0].string.text;
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else if (!strcmp(attr->name, "device-uri") &&
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attr->value_tag == IPP_TAG_URI)
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device_uri = attr->values[0].string.text;
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}
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}
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while (state != IPP_STATE_DATA);
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DEBUG_printf(("2cupsGetDevices: state=%d, response->last=%p", state, (void *)response->last));
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if (device_class && device_id && device_info && device_make_and_model &&
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device_uri)
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(*callback)(device_class, device_id, device_info,
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device_make_and_model, device_uri, device_location, user_data);
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/*
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* Set the IPP status and return...
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*/
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httpBlocking(http, blocking);
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httpFlush(http);
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if (status == HTTP_STATUS_ERROR)
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_cupsSetError(IPP_STATUS_ERROR_INTERNAL, strerror(http->error), 0);
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else
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{
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attr = ippFindAttribute(response, "status-message", IPP_TAG_TEXT);
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DEBUG_printf(("cupsGetDevices: status-code=%s, status-message=\"%s\"",
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ippErrorString(response->request.status.status_code),
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attr ? attr->values[0].string.text : ""));
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_cupsSetError(response->request.status.status_code,
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attr ? attr->values[0].string.text :
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ippErrorString(response->request.status.status_code), 0);
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}
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ippDelete(response);
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return (cupsLastError());
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}
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