/*
 * ng_source.h
 */

/*-
 * Copyright 2002 Sandvine Inc.
 * All rights reserved.
 *
 * Subject to the following obligations and disclaimer of warranty, use and
 * redistribution of this software, in source or object code forms, with or
 * without modifications are expressly permitted by Sandvine Inc.; provided,
 * however, that:
 * 1. Any and all reproductions of the source or object code must include the
 *    copyright notice above and the following disclaimer of warranties; and
 * 2. No rights are granted, in any manner or form, to use Sandvine Inc.
 *    trademarks, including the mark "SANDVINE" on advertising, endorsements,
 *    or otherwise except as such appears in the above copyright notice or in
 *    the software.
 *
 * THIS SOFTWARE IS BEING PROVIDED BY SANDVINE "AS IS", AND TO THE MAXIMUM
 * EXTENT PERMITTED BY LAW, SANDVINE MAKES NO REPRESENTATIONS OR WARRANTIES,
 * EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE, INCLUDING WITHOUT LIMITATION,
 * ANY AND ALL IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
 * PURPOSE, OR NON-INFRINGEMENT.  SANDVINE DOES NOT WARRANT, GUARANTEE, OR
 * MAKE ANY REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE
 * USE OF THIS SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY
 * OR OTHERWISE.  IN NO EVENT SHALL SANDVINE BE LIABLE FOR ANY DAMAGES
 * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
 * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
 * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF SANDVINE IS ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 *
 * Author: Dave Chapeskie
 */

#ifndef _NETGRAPH_NG_SOURCE_H_
#define _NETGRAPH_NG_SOURCE_H_

/* Node type name and magic cookie */
#define NG_SOURCE_NODE_TYPE	"source"
#define NGM_SOURCE_COOKIE	1110646684

/* Hook names */
#define NG_SOURCE_HOOK_INPUT	"input"
#define NG_SOURCE_HOOK_OUTPUT	"output"

/* Statistics structure returned by NGM_SOURCE_GET_STATS */
struct ng_source_stats {
	uint64_t	outOctets;
	uint64_t	outFrames;
	uint32_t	queueOctets;
	uint32_t	queueFrames;
	uint32_t	maxPps;
	struct timeval	startTime;
	struct timeval	endTime;
	struct timeval	elapsedTime;
	struct timeval	lastTime;
};

extern const struct ng_parse_type ng_source_timeval_type;
/* Keep this in sync with the above structure definition */
#define NG_SOURCE_STATS_TYPE_INFO	{			\
	  { "outOctets",	&ng_parse_uint64_type	},	\
	  { "outFrames",	&ng_parse_uint64_type	},	\
	  { "queueOctets",	&ng_parse_uint32_type	},	\
	  { "queueFrames",	&ng_parse_uint32_type	},	\
	  { "maxPps",		&ng_parse_uint32_type	},	\
	  { "startTime",	&ng_source_timeval_type },	\
	  { "endTime",		&ng_source_timeval_type },	\
	  { "elapsedTime",	&ng_source_timeval_type },	\
	  { "lastTime",		&ng_source_timeval_type },	\
	  { NULL }						\
}

/* Packet embedding info for NGM_SOURCE_GET/SET_TIMESTAMP */
struct ng_source_embed_info {
	uint16_t	offset;		/* offset from ethernet header */
	uint8_t		flags;
	uint8_t		spare;
};
#define NGM_SOURCE_EMBED_ENABLE		0x01	/* enable embedding */
#define	NGM_SOURCE_INC_CNT_PER_LIST	0x02	/* increment once per list */

/* Keep this in sync with the above structure definition. */
#define NG_SOURCE_EMBED_TYPE_INFO {				\
	{ "offset",		&ng_parse_hint16_type	},	\
	{ "flags",		&ng_parse_hint8_type	},	\
	{ NULL }						\
}

/* Packet embedding info for NGM_SOURCE_GET/SET_COUNTER */
#define	NG_SOURCE_COUNTERS	4
struct ng_source_embed_cnt_info {
	uint16_t	offset;		/* offset from ethernet header */
	uint8_t		flags;		/* as above */
	uint8_t		width;		/* in bytes (1, 2, 4) */
	uint32_t	next_val;
	uint32_t	min_val;
	uint32_t	max_val;
	int32_t		increment;
	uint8_t		index;		/* which counter (0..3) */
};

/* Keep this in sync with the above structure definition. */
#define NG_SOURCE_EMBED_CNT_TYPE_INFO {				\
	{ "offset",		&ng_parse_hint16_type	}, 	\
	{ "flags",		&ng_parse_hint8_type	},	\
	{ "width",		&ng_parse_uint8_type	},	\
	{ "next_val",		&ng_parse_uint32_type	},	\
	{ "min_val",		&ng_parse_uint32_type	},	\
	{ "max_val",		&ng_parse_uint32_type	},	\
	{ "increment",		&ng_parse_int32_type	},	\
	{ "index",		&ng_parse_uint8_type	},	\
	{ NULL }						\
}

/* Netgraph commands */
enum {
	NGM_SOURCE_GET_STATS = 1,	/* get stats */
	NGM_SOURCE_CLR_STATS,		/* clear stats */
	NGM_SOURCE_GETCLR_STATS,	/* atomically get and clear stats */
	NGM_SOURCE_START,		/* start sending queued data */
	NGM_SOURCE_STOP,		/* stop sending queued data */
	NGM_SOURCE_CLR_DATA,		/* clear the queued data */
	NGM_SOURCE_SETIFACE,		/* configure downstream iface */
	NGM_SOURCE_SETPPS,		/* rate-limiting packets per second */
	NGM_SOURCE_SET_TIMESTAMP,	/* embed xmit timestamp */
	NGM_SOURCE_GET_TIMESTAMP,
	NGM_SOURCE_SET_COUNTER,		/* embed counter */
	NGM_SOURCE_GET_COUNTER,
};

#endif /* _NETGRAPH_NG_SOURCE_H_ */