[thirdparty/cups.git] / cups / sidechannel.h

/*
 * Side-channel API definitions for CUPS.
 *
 * Copyright 2007-2012 by Apple Inc.
 * Copyright 2006 by Easy Software Products.
 *
 * These coded instructions, statements, and computer programs are the
 * property of Apple Inc. and are protected by Federal copyright
 * law.  Distribution and use rights are outlined in the file "LICENSE.txt"
 * which should have been included with this file.  If this file is
 * file is missing or damaged, see the license at "http://www.cups.org/".
 *
 * This file is subject to the Apple OS-Developed Software exception.
 */

#ifndef _CUPS_SIDECHANNEL_H_
#  define _CUPS_SIDECHANNEL_H_

/*
 * Include necessary headers...
 */

#  include "versioning.h"


/*
 * C++ magic...
 */

#  ifdef __cplusplus
extern "C" {
#  endif /* __cplusplus */


/*
 * Constants...
 */

#define CUPS_SC_FD	4		/* File descriptor for select/poll */


/*
 * Enumerations...
 */

enum cups_sc_bidi_e			/**** Bidirectional capability values ****/
{
  CUPS_SC_BIDI_NOT_SUPPORTED = 0,	/* Bidirectional I/O is not supported */
  CUPS_SC_BIDI_SUPPORTED = 1		/* Bidirectional I/O is supported */
};
typedef enum cups_sc_bidi_e cups_sc_bidi_t;
					/**** Bidirectional capabilities ****/

enum cups_sc_command_e			/**** Request command codes ****/
{
  CUPS_SC_CMD_NONE = 0,			/* No command @private@ */
  CUPS_SC_CMD_SOFT_RESET = 1,		/* Do a soft reset */
  CUPS_SC_CMD_DRAIN_OUTPUT = 2,		/* Drain all pending output */
  CUPS_SC_CMD_GET_BIDI = 3,		/* Return bidirectional capabilities */
  CUPS_SC_CMD_GET_DEVICE_ID = 4,	/* Return the IEEE-1284 device ID */
  CUPS_SC_CMD_GET_STATE = 5,		/* Return the device state */
  CUPS_SC_CMD_SNMP_GET = 6,		/* Query an SNMP OID @since CUPS 1.4/OS X 10.6@ */
  CUPS_SC_CMD_SNMP_GET_NEXT = 7,	/* Query the next SNMP OID @since CUPS 1.4/OS X 10.6@ */
  CUPS_SC_CMD_GET_CONNECTED = 8,	/* Return whether the backend is "connected" to the printer @since CUPS 1.5/OS X 10.7@ */
  CUPS_SC_CMD_MAX			/* End of valid values @private@ */
};
typedef enum cups_sc_command_e cups_sc_command_t;
					/**** Request command codes ****/

enum cups_sc_connected_e		/**** Connectivity values ****/
{
  CUPS_SC_NOT_CONNECTED = 0,		/* Backend is not "connected" to printer */
  CUPS_SC_CONNECTED = 1			/* Backend is "connected" to printer */
};
typedef enum cups_sc_connected_e cups_sc_connected_t;
					/**** Connectivity values ****/


enum cups_sc_state_e			/**** Printer state bits ****/
{
  CUPS_SC_STATE_OFFLINE = 0,		/* Device is offline */
  CUPS_SC_STATE_ONLINE = 1,		/* Device is online */
  CUPS_SC_STATE_BUSY = 2,		/* Device is busy */
  CUPS_SC_STATE_ERROR = 4,		/* Other error condition */
  CUPS_SC_STATE_MEDIA_LOW = 16,		/* Paper low condition */
  CUPS_SC_STATE_MEDIA_EMPTY = 32,	/* Paper out condition */
  CUPS_SC_STATE_MARKER_LOW = 64,	/* Toner/ink low condition */
  CUPS_SC_STATE_MARKER_EMPTY = 128	/* Toner/ink out condition */
};
typedef enum cups_sc_state_e cups_sc_state_t;
					/**** Printer state bits ****/

enum cups_sc_status_e			/**** Response status codes ****/
{
  CUPS_SC_STATUS_NONE,			/* No status */
  CUPS_SC_STATUS_OK,			/* Operation succeeded */
  CUPS_SC_STATUS_IO_ERROR,		/* An I/O error occurred */
  CUPS_SC_STATUS_TIMEOUT,		/* The backend did not respond */
  CUPS_SC_STATUS_NO_RESPONSE,		/* The device did not respond */
  CUPS_SC_STATUS_BAD_MESSAGE,		/* The command/response message was invalid */
  CUPS_SC_STATUS_TOO_BIG,		/* Response too big */
  CUPS_SC_STATUS_NOT_IMPLEMENTED	/* Command not implemented */
};
typedef enum cups_sc_status_e cups_sc_status_t;
					/**** Response status codes ****/

typedef void (*cups_sc_walk_func_t)(const char *oid, const char *data,
                                    int datalen, void *context);
					/**** SNMP walk callback ****/


/*
 * Prototypes...
 */

extern cups_sc_status_t	cupsSideChannelDoRequest(cups_sc_command_t command,
			                         char *data, int *datalen,
						 double timeout) _CUPS_API_1_3;
extern int		cupsSideChannelRead(cups_sc_command_t *command,
			                    cups_sc_status_t *status,
					    char *data, int *datalen,
					    double timeout) _CUPS_API_1_3;
extern int		cupsSideChannelWrite(cups_sc_command_t command,
			                     cups_sc_status_t status,
					     const char *data, int datalen,
					     double timeout) _CUPS_API_1_3;

/**** New in CUPS 1.4 ****/
extern cups_sc_status_t	cupsSideChannelSNMPGet(const char *oid, char *data,
			                       int *datalen, double timeout)
					       _CUPS_API_1_4;
extern cups_sc_status_t	cupsSideChannelSNMPWalk(const char *oid, double timeout,
						cups_sc_walk_func_t cb,
						void *context) _CUPS_API_1_4;


#  ifdef __cplusplus
}
#  endif /* __cplusplus */

#endif /* !_CUPS_SIDECHANNEL_H_ */
Commit	Line	Data
f7deaa1a	1	/*
503b54c9	2	* Side-channel API definitions for CUPS.
f7deaa1a	3	*
503b54c9 MS	4	* Copyright 2007-2012 by Apple Inc.
503b54c9 MS	5	* Copyright 2006 by Easy Software Products.
f7deaa1a	6	*
503b54c9 MS	7	* These coded instructions, statements, and computer programs are the
	8	* property of Apple Inc. and are protected by Federal copyright
	9	* law. Distribution and use rights are outlined in the file "LICENSE.txt"
	10	* which should have been included with this file. If this file is
	11	* file is missing or damaged, see the license at "http://www.cups.org/".
f7deaa1a	12	*
503b54c9	13	* This file is subject to the Apple OS-Developed Software exception.
f7deaa1a	14	*/
	15
	16	#ifndef _CUPS_SIDECHANNEL_H_
	17	# define _CUPS_SIDECHANNEL_H_
	18
2fb76298 MS	19	/*
	20	* Include necessary headers...
	21	*/
	22
	23	# include "versioning.h"
	24
	25
f7deaa1a	26	/*
	27	* C++ magic...
	28	*/
	29
	30	# ifdef __cplusplus
	31	extern "C" {
	32	# endif /* __cplusplus */
	33
	34
	35	/*
	36	* Constants...
	37	*/
	38
	39	#define CUPS_SC_FD 4 /* File descriptor for select/poll */
	40
	41
	42	/*
	43	* Enumerations...
	44	*/
	45
79e1d494	46	enum cups_sc_bidi_e /** Bidirectional capability values **/
f7deaa1a	47	{
	48	CUPS_SC_BIDI_NOT_SUPPORTED = 0, /* Bidirectional I/O is not supported */
	49	CUPS_SC_BIDI_SUPPORTED = 1 /* Bidirectional I/O is supported */
5a738aea MS	50	};
	51	typedef enum cups_sc_bidi_e cups_sc_bidi_t;
	52	/** Bidirectional capabilities **/
f7deaa1a	53
5a738aea	54	enum cups_sc_command_e /** Request command codes **/
f7deaa1a	55	{
18ecb428	56	CUPS_SC_CMD_NONE = 0, /* No command @private@ */
f7deaa1a	57	CUPS_SC_CMD_SOFT_RESET = 1, /* Do a soft reset */
	58	CUPS_SC_CMD_DRAIN_OUTPUT = 2, /* Drain all pending output */
	59	CUPS_SC_CMD_GET_BIDI = 3, /* Return bidirectional capabilities */
	60	CUPS_SC_CMD_GET_DEVICE_ID = 4, /* Return the IEEE-1284 device ID */
20fbc903	61	CUPS_SC_CMD_GET_STATE = 5, /* Return the device state */
f3c17241 MS	62	CUPS_SC_CMD_SNMP_GET = 6, /* Query an SNMP OID @since CUPS 1.4/OS X 10.6@ */
	63	CUPS_SC_CMD_SNMP_GET_NEXT = 7, /* Query the next SNMP OID @since CUPS 1.4/OS X 10.6@ */
	64	CUPS_SC_CMD_GET_CONNECTED = 8, /* Return whether the backend is "connected" to the printer @since CUPS 1.5/OS X 10.7@ */
f14324a7	65	CUPS_SC_CMD_MAX /* End of valid values @private@ */
5a738aea MS	66	};
	67	typedef enum cups_sc_command_e cups_sc_command_t;
	68	/** Request command codes **/
f7deaa1a	69
f14324a7 MS	70	enum cups_sc_connected_e /** Connectivity values **/
	71	{
	72	CUPS_SC_NOT_CONNECTED = 0, /* Backend is not "connected" to printer */
	73	CUPS_SC_CONNECTED = 1 /* Backend is "connected" to printer */
	74	};
	75	typedef enum cups_sc_connected_e cups_sc_connected_t;
	76	/** Connectivity values **/
	77
	78
5a738aea	79	enum cups_sc_state_e /** Printer state bits **/
f7deaa1a	80	{
79e1d494 MS	81	CUPS_SC_STATE_OFFLINE = 0, /* Device is offline */
79e1d494 MS	82	CUPS_SC_STATE_ONLINE = 1, /* Device is online */
f7deaa1a	83	CUPS_SC_STATE_BUSY = 2, /* Device is busy */
	84	CUPS_SC_STATE_ERROR = 4, /* Other error condition */
	85	CUPS_SC_STATE_MEDIA_LOW = 16, /* Paper low condition */
	86	CUPS_SC_STATE_MEDIA_EMPTY = 32, /* Paper out condition */
	87	CUPS_SC_STATE_MARKER_LOW = 64, /* Toner/ink low condition */
	88	CUPS_SC_STATE_MARKER_EMPTY = 128 /* Toner/ink out condition */
5a738aea MS	89	};
	90	typedef enum cups_sc_state_e cups_sc_state_t;
	91	/** Printer state bits **/
f7deaa1a	92
5a738aea	93	enum cups_sc_status_e /** Response status codes **/
f7deaa1a	94	{
	95	CUPS_SC_STATUS_NONE, /* No status */
	96	CUPS_SC_STATUS_OK, /* Operation succeeded */
	97	CUPS_SC_STATUS_IO_ERROR, /* An I/O error occurred */
	98	CUPS_SC_STATUS_TIMEOUT, /* The backend did not respond */
	99	CUPS_SC_STATUS_NO_RESPONSE, /* The device did not respond */
	100	CUPS_SC_STATUS_BAD_MESSAGE, /* The command/response message was invalid */
	101	CUPS_SC_STATUS_TOO_BIG, /* Response too big */
	102	CUPS_SC_STATUS_NOT_IMPLEMENTED /* Command not implemented */
5a738aea MS	103	};
	104	typedef enum cups_sc_status_e cups_sc_status_t;
	105	/** Response status codes **/
f7deaa1a	106
20fbc903 MS	107	typedef void (cups_sc_walk_func_t)(const char oid, const char *data,
	108	int datalen, void *context);
	109	/** SNMP walk callback **/
	110
f7deaa1a	111
	112	/*
	113	* Prototypes...
	114	*/
	115
	116	extern cups_sc_status_t cupsSideChannelDoRequest(cups_sc_command_t command,
	117	char data, int datalen,
2fb76298	118	double timeout) _CUPS_API_1_3;
f7deaa1a	119	extern int cupsSideChannelRead(cups_sc_command_t *command,
	120	cups_sc_status_t *status,
	121	char data, int datalen,
2fb76298	122	double timeout) _CUPS_API_1_3;
f7deaa1a	123	extern int cupsSideChannelWrite(cups_sc_command_t command,
	124	cups_sc_status_t status,
	125	const char *data, int datalen,
2fb76298	126	double timeout) _CUPS_API_1_3;
f7deaa1a	127
20fbc903 MS	128	/** New in CUPS 1.4 **/
	129	extern cups_sc_status_t cupsSideChannelSNMPGet(const char oid, char data,
	130	int *datalen, double timeout)
	131	_CUPS_API_1_4;
	132	extern cups_sc_status_t cupsSideChannelSNMPWalk(const char *oid, double timeout,
	133	cups_sc_walk_func_t cb,
	134	void *context) _CUPS_API_1_4;
	135
f7deaa1a	136
	137	# ifdef __cplusplus
	138	}
	139	# endif /* __cplusplus */
	140
	141	#endif /* !_CUPS_SIDECHANNEL_H_ */