/*
 * Copyright (c) 2008-2016 Apple Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 * 
 * Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
 */
/*
 * Copyright (c) 1982, 1986, 1989, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON 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 ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)udp_var.h	8.1 (Berkeley) 6/10/93
 */

#ifndef _NETINET_UDP_VAR_H_
#define _NETINET_UDP_VAR_H_

#include <sys/appleapiopts.h>
#include <sys/sysctl.h>

/*
 * UDP kernel structures and variables.
 */
struct	udpiphdr {
	struct	ipovly ui_i;		/* overlaid ip structure */
	struct	udphdr ui_u;		/* udp header */
};
#define	ui_x1		ui_i.ih_x1
#define	ui_pr		ui_i.ih_pr
#define	ui_len		ui_i.ih_len
#define	ui_src		ui_i.ih_src
#define	ui_dst		ui_i.ih_dst
#define	ui_sport	ui_u.uh_sport
#define	ui_dport	ui_u.uh_dport
#define	ui_ulen		ui_u.uh_ulen
#define	ui_sum		ui_u.uh_sum
#define ui_next		ui_i.ih_next
#define ui_prev		ui_i.ih_prev

struct	udpstat {
	/* input statistics: */
	u_int32_t udps_ipackets;	/* total input packets */
	u_int32_t udps_hdrops;		/* packet shorter than header */
	u_int32_t udps_badsum;		/* checksum error */
	u_int32_t udps_badlen;		/* data length larger than packet */
	u_int32_t udps_noport;		/* no socket on port */
	u_int32_t udps_noportbcast;	/* of above, arrived as broadcast */
	u_int32_t udps_fullsock;	/* not delivered, input socket full */
	u_int32_t udpps_pcbcachemiss;	/* input packets missing pcb cache */
	u_int32_t udpps_pcbhashmiss;	/* input packets not for hashed pcb */
	/* output statistics: */
	u_int32_t udps_opackets;	/* total output packets */
	u_int32_t udps_fastout;		/* output packets on fast path */
	u_int32_t udps_nosum;		/* no checksum */
	u_int32_t udps_noportmcast;	/* of no socket on port, multicast */
	u_int32_t udps_filtermcast;	/* blocked by multicast filter */
	/* checksum statistics: */
	u_int32_t udps_rcv_swcsum;	  /* udp swcksum (inbound), packets */
	u_int32_t udps_rcv_swcsum_bytes;  /* udp swcksum (inbound), bytes */
	u_int32_t udps_rcv6_swcsum;	  /* udp6 swcksum (inbound), packets */
	u_int32_t udps_rcv6_swcsum_bytes; /* udp6 swcksum (inbound), bytes */
	u_int32_t udps_snd_swcsum;	  /* udp swcksum (outbound), packets */
	u_int32_t udps_snd_swcsum_bytes;  /* udp swcksum (outbound), bytes */
	u_int32_t udps_snd6_swcsum;	  /* udp6 swcksum (outbound), packets */
	u_int32_t udps_snd6_swcsum_bytes; /* udp6 swcksum (outbound), bytes */
};

/*
 * Names for UDP sysctl objects
 */
#define	UDPCTL_CHECKSUM		1	/* checksum UDP packets */
#define UDPCTL_STATS		2	/* statistics (read-only) */
#define	UDPCTL_MAXDGRAM		3	/* max datagram size */
#define	UDPCTL_RECVSPACE	4	/* default receive buffer space */
#define	UDPCTL_PCBLIST		5	/* list of PCBs for UDP sockets */
#define UDPCTL_MAXID		6

#ifdef BSD_KERNEL_PRIVATE
#include <kern/locks.h>
#include <sys/bitstring.h>

#define UDPCTL_NAMES {							\
	{ 0, 0 },							\
	{ "checksum", CTLTYPE_INT },					\
	{ "stats", CTLTYPE_STRUCT },					\
	{ "maxdgram", CTLTYPE_INT },					\
	{ "recvspace", CTLTYPE_INT },					\
	{ "pcblist", CTLTYPE_STRUCT },					\
}

#ifdef INET6
#define	udp6stat	udpstat
#define	udp6s_opackets	udps_opackets
#endif /* INET6 */

SYSCTL_DECL(_net_inet_udp);

struct udpstat_local {
	u_int64_t	port_unreach;
	u_int64_t	faithprefix;	/* deprecated */
	u_int64_t	port0;
	u_int64_t	badlength;
	u_int64_t	badchksum;
	u_int64_t	badmcast;
	u_int64_t	cleanup;
	u_int64_t	badipsec;
};

extern struct pr_usrreqs udp_usrreqs;
extern struct inpcbhead udb;
extern struct inpcbinfo udbinfo;
extern u_int32_t udp_sendspace;
extern u_int32_t udp_recvspace;
extern struct udpstat udpstat;
extern int udp_log_in_vain;

__BEGIN_DECLS
extern void udp_ctlinput(int, struct sockaddr *, void *);
extern int udp_ctloutput(struct socket *, struct sockopt *);
extern void udp_init(struct protosw *, struct domain *);
extern void udp_input(struct mbuf *, int);
extern int udp_connectx_common(struct socket *, int, struct sockaddr *,
    struct sockaddr *, struct proc *, uint32_t, sae_associd_t,
    sae_connid_t *, uint32_t, void *, uint32_t, struct uio*, user_ssize_t *);
extern void udp_notify(struct inpcb *inp, int errno);
extern int udp_shutdown(struct socket *so);
extern int udp_lock(struct socket *, int, void *);
extern int udp_unlock(struct socket *, int, void *);
extern lck_mtx_t *udp_getlock(struct socket *, int);
extern void udp_get_ports_used(u_int32_t, int, u_int32_t, bitstr_t *);
extern uint32_t udp_count_opportunistic(unsigned int, u_int32_t);
extern uint32_t udp_find_anypcb_byaddr(struct ifaddr *);

extern void udp_fill_keepalive_offload_frames(struct ifnet *,
    struct ifnet_keepalive_offload_frame *, u_int32_t, size_t, u_int32_t *);

__END_DECLS
#endif /* BSD_KERNEL_PRIVATE */
#endif /* _NETINET_UDP_VAR_H_ */
