/* $NetBSD: ip6protosw.h,v 1.27 2019/03/19 13:38:53 msaitoh Exp $ */

/* $NetBSD: ip6protosw.h,v 1.27 2019/03/19 13:38:53 msaitoh Exp $ */
/* $KAME: ip6protosw.h,v 1.22 2001/02/08 18:02:08 itojun Exp $ */

/*
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
* 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. Neither the name of the project 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 PROJECT 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 PROJECT 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.
*
*/

/* BSDI protosw.h,v 2.3 1996/10/11 16:02:40 pjd Exp */

/*-
* Copyright (c) 1982, 1986, 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. 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.
*
* @(#)protosw.h 8.1 (Berkeley) 6/2/93
*/

#ifndef _NETINET6_IP6PROTOSW_H_
#define _NETINET6_IP6PROTOSW_H_

/*
* Protocol switch table for IPv6.
* All other definitions should refer to sys/protosw.h
*/

struct mbuf;
struct sockaddr;
struct socket;
struct domain;
struct proc;
struct ip6_hdr;
struct icmp6_hdr;
struct in6_addr;

/*
* argument type for the last arg of pr_ctlinput().
* should be consulted only with AF_INET6 family.
*
* IPv6 ICMP IPv6 [exthdrs] finalhdr payload
* ^ ^ ^ ^
* | | ip6c_ip6 ip6c_off
* | ip6c_icmp6
* ip6c_m
*
* ip6c_finaldst usually points to ip6c_ip6->ip6_dst. if the original
* (internal) packet carries a routing header, it may point the final
* destination address in the routing header.
*
* ip6c_src: ip6c_ip6->ip6_src + scope info + flowlabel in ip6c_ip6
* (beware of flowlabel, if you try to compare it against others)
* ip6c_dst: ip6c_finaldst + scope info
*/
struct ip6ctlparam {
struct mbuf *ip6c_m; /* start of mbuf chain */
struct icmp6_hdr *ip6c_icmp6; /* icmp6 header of target packet */
struct ip6_hdr *ip6c_ip6; /* ip6 header of target packet */
int ip6c_off; /* offset of the target proto header */
struct sockaddr_in6 *ip6c_src; /* srcaddr w/ additional info */
struct sockaddr_in6 *ip6c_dst; /* (final) dstaddr w/ additional info */
struct in6_addr *ip6c_finaldst; /* final destination address */
void *ip6c_cmdarg; /* control command dependent data */
u_int8_t ip6c_nxt; /* final next header field */
};

struct ip6protosw {
int pr_type; /* socket type used for */
struct domain *pr_domain; /* domain protocol a member of */
short pr_protocol; /* protocol number */
short pr_flags; /* see below */

/* protocol-protocol hooks */
int (*pr_input) /* input to protocol (from below) */
(struct mbuf **, int *, int);
void *(*pr_ctlinput) /* control input (from below) */
(int, const struct sockaddr *, void *);
int (*pr_ctloutput) /* control output (from above) */
(int, struct socket *, struct sockopt *);

/* user-protocol hook */
const struct pr_usrreqs *pr_usrreqs;

/* utility hooks */
void (*pr_init) /* initialization hook */
(void);

void (*pr_fasttimo) /* fast timeout (200ms) */
(void);
void (*pr_slowtimo) /* slow timeout (500ms) */
(void);
void (*pr_drain) /* flush any excess space possible */
(void);
};

#ifdef _KERNEL
#define PR_WRAP_INPUT6(name) \
static int \
name##_wrapper(struct mbuf **mp, int *offp, int proto) \
{ \
int rv; \
mutex_enter(softnet_lock); \
rv = name(mp, offp, proto); \
mutex_exit(softnet_lock); \
return rv; \
}
#endif

extern const struct ip6protosw inet6sw[];

#endif /* !_NETINET6_IP6PROTOSW_H_ */