/*      $OpenBSD: in_proto.c,v 1.127 2025/07/19 16:40:40 mvs Exp $      */
/*      $NetBSD: in_proto.c,v 1.14 1996/02/18 18:58:32 christos 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.
 */

/*
 * 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.
 *
 *      @(#)COPYRIGHT   1.1 (NRL) 17 January 1995
 *
 * NRL grants permission for redistribution and use in source and binary
 * forms, with or without modification, of the software and documentation
 * created at NRL 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 acknowledgements:
 *      This product includes software developed by the University of
 *      California, Berkeley and its contributors.
 *      This product includes software developed at the Information
 *      Technology Division, US Naval Research Laboratory.
 * 4. Neither the name of the NRL nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THE SOFTWARE PROVIDED BY NRL IS PROVIDED BY NRL 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 NRL 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.
 *
 * The views and conclusions contained in the software and documentation
 * are those of the authors and should not be interpreted as representing
 * official policies, either expressed or implied, of the US Naval
 * Research Laboratory (NRL).
 */

#include <sys/param.h>
#include <sys/socket.h>
#include <sys/protosw.h>
#include <sys/domain.h>

#include <net/if.h>
#include <net/if_var.h>

#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/ip_var.h>
#include <netinet/ip_icmp.h>
#include <netinet/in_pcb.h>

#include <netinet/igmp_var.h>
#include <netinet/tcp.h>
#include <netinet/tcp_timer.h>
#include <netinet/tcp_var.h>
#include <netinet/udp.h>
#include <netinet/udp_var.h>

/*
 * TCP/IP protocol family: IP, ICMP, UDP, TCP.
 */

#include "gif.h"
#if NGIF > 0
#include <net/if_gif.h>
#endif

#ifdef IPSEC
#include <netinet/ip_ipsp.h>
#endif

#include <netinet/ip_ipip.h>

#include "gre.h"
#if NGRE > 0
#include <netinet/ip_gre.h>
#include <net/if_gre.h>
#endif

#include "carp.h"
#if NCARP > 0
#include <netinet/ip_carp.h>
#endif

#include "pfsync.h"
#if NPFSYNC > 0
#include <net/pfvar.h>
#include <net/if_pfsync.h>
#endif

#include "pf.h"
#if NPF > 0
#include <netinet/ip_divert.h>
#endif

#include "etherip.h"
#if NETHERIP > 0
#include <net/if_etherip.h>
#endif

u_char ip_protox[IPPROTO_MAX];

const struct protosw inetsw[] = {
{
  .pr_domain    = &inetdomain,
  .pr_init      = ip_init,
  .pr_slowtimo  = ip_slowtimo,
#ifndef SMALL_KERNEL
  .pr_flags     = PR_MPSYSCTL,
  .pr_sysctl    = ip_sysctl
#endif /* SMALL_KERNEL */
},
{
  .pr_type      = SOCK_DGRAM,
  .pr_domain    = &inetdomain,
  .pr_protocol  = IPPROTO_UDP,
  .pr_flags     = PR_ATOMIC|PR_ADDR|PR_SPLICE|PR_MPINPUT|PR_MPSYSCTL,
  .pr_input     = udp_input,
  .pr_ctlinput  = udp_ctlinput,
  .pr_ctloutput = ip_ctloutput,
  .pr_usrreqs   = &udp_usrreqs,
  .pr_init      = udp_init,
#ifndef SMALL_KERNEL
  .pr_sysctl    = udp_sysctl
#endif /* SMALL_KERNEL */
},
{
  .pr_type      = SOCK_STREAM,
  .pr_domain    = &inetdomain,
  .pr_protocol  = IPPROTO_TCP,
  .pr_flags     = PR_CONNREQUIRED|PR_WANTRCVD|PR_ABRTACPTDIS|PR_SPLICE|
                    PR_MPINPUT|PR_MPSYSCTL,
  .pr_input     = tcp_input,
  .pr_ctlinput  = tcp_ctlinput,
  .pr_ctloutput = tcp_ctloutput,
  .pr_usrreqs   = &tcp_usrreqs,
  .pr_init      = tcp_init,
  .pr_slowtimo  = tcp_slowtimo,
#ifndef SMALL_KERNEL
  .pr_sysctl    = tcp_sysctl
#endif /* SMALL_KERNEL */
},
{
  .pr_type      = SOCK_RAW,
  .pr_domain    = &inetdomain,
  .pr_protocol  = IPPROTO_RAW,
  .pr_flags     = PR_ATOMIC|PR_ADDR|PR_MPINPUT,
  .pr_input     = rip_input,
  .pr_ctloutput = rip_ctloutput,
  .pr_usrreqs   = &rip_usrreqs,
},
{
  .pr_type      = SOCK_RAW,
  .pr_domain    = &inetdomain,
  .pr_protocol  = IPPROTO_ICMP,
  .pr_flags     = PR_ATOMIC|PR_ADDR|PR_MPSYSCTL,
  .pr_input     = icmp_input,
  .pr_ctloutput = rip_ctloutput,
  .pr_usrreqs   = &rip_usrreqs,
  .pr_init      = icmp_init,
#ifndef SMALL_KERNEL
  .pr_sysctl    = icmp_sysctl
#endif /* SMALL_KERNEL */
},
{
  .pr_type      = SOCK_RAW,
  .pr_domain    = &inetdomain,
  .pr_protocol  = IPPROTO_IPV4,
  .pr_flags     = PR_ATOMIC|PR_ADDR|PR_MPSYSCTL,
#if NGIF > 0
  .pr_input     = in_gif_input,
#else
  .pr_input     = ipip_input,
#endif
  .pr_ctloutput = rip_ctloutput,
  .pr_usrreqs   = &rip_usrreqs,
#ifndef SMALL_KERNEL
  .pr_sysctl    = ipip_sysctl,
#endif /* SMALL_KERNEL */
  .pr_init      = ipip_init
},
#ifdef INET6
{
  .pr_type      = SOCK_RAW,
  .pr_domain    = &inetdomain,
  .pr_protocol  = IPPROTO_IPV6,
  .pr_flags     = PR_ATOMIC|PR_ADDR,
#if NGIF > 0
  .pr_input     = in_gif_input,
#else
  .pr_input     = ipip_input,
#endif
  .pr_ctloutput = rip_ctloutput,
  .pr_usrreqs   = &rip_usrreqs, /* XXX */
},
#endif
#if defined(MPLS) && NGIF > 0
{
  .pr_type      = SOCK_RAW,
  .pr_domain    = &inetdomain,
  .pr_protocol  = IPPROTO_MPLS,
  .pr_flags     = PR_ATOMIC|PR_ADDR,
  .pr_input     = in_gif_input,
  .pr_usrreqs   = &rip_usrreqs,
},
#endif /* MPLS && GIF */
{
  .pr_type      = SOCK_RAW,
  .pr_domain    = &inetdomain,
  .pr_protocol  = IPPROTO_IGMP,
  .pr_flags     = PR_ATOMIC|PR_ADDR|PR_MPSYSCTL,
  .pr_input     = igmp_input,
  .pr_ctloutput = rip_ctloutput,
  .pr_usrreqs   = &rip_usrreqs,
  .pr_init      = igmp_init,
  .pr_fasttimo  = igmp_fasttimo,
  .pr_slowtimo  = igmp_slowtimo,
#ifndef SMALL_KERNEL
  .pr_sysctl    = igmp_sysctl
#endif /* SMALL_KERNEL */
},
#ifdef IPSEC
{
  .pr_type      = SOCK_RAW,
  .pr_domain    = &inetdomain,
  .pr_protocol  = IPPROTO_AH,
  .pr_flags     = PR_ATOMIC|PR_ADDR|PR_MPSYSCTL,
  .pr_input     = ah46_input,
  .pr_ctlinput  = ah4_ctlinput,
  .pr_ctloutput = rip_ctloutput,
  .pr_usrreqs   = &rip_usrreqs,
#ifndef SMALL_KERNEL
  .pr_sysctl    = ah_sysctl
#endif /* SMALL_KERNEL */
},
{
  .pr_type      = SOCK_RAW,
  .pr_domain    = &inetdomain,
  .pr_protocol  = IPPROTO_ESP,
  .pr_flags     = PR_ATOMIC|PR_ADDR|PR_MPSYSCTL,
  .pr_input     = esp46_input,
  .pr_ctlinput  = esp4_ctlinput,
  .pr_ctloutput = rip_ctloutput,
  .pr_usrreqs   = &rip_usrreqs,
#ifndef SMALL_KERNEL
  .pr_sysctl    = esp_sysctl
#endif /* SMALL_KERNEL */
},
{
  .pr_type      = SOCK_RAW,
  .pr_domain    = &inetdomain,
  .pr_protocol  = IPPROTO_IPCOMP,
  .pr_flags     = PR_ATOMIC|PR_ADDR|PR_MPSYSCTL,
  .pr_input     = ipcomp46_input,
  .pr_ctloutput = rip_ctloutput,
  .pr_usrreqs   = &rip_usrreqs,
#ifndef SMALL_KERNEL
  .pr_sysctl    = ipcomp_sysctl
#endif /* SMALL_KERNEL */
},
#endif /* IPSEC */
#if NGRE > 0
{
  .pr_type      = SOCK_RAW,
  .pr_domain    = &inetdomain,
  .pr_protocol  = IPPROTO_GRE,
  .pr_flags     = PR_ATOMIC|PR_ADDR|PR_MPSYSCTL,
  .pr_input     = gre_input,
  .pr_ctloutput = rip_ctloutput,
  .pr_usrreqs   = &gre_usrreqs,
#ifndef SMALL_KERNEL
  .pr_sysctl    = gre_sysctl
#endif /* SMALL_KERNEL */
},
#endif /* NGRE > 0 */
#if NCARP > 0
{
  .pr_type      = SOCK_RAW,
  .pr_domain    = &inetdomain,
  .pr_protocol  = IPPROTO_CARP,
  .pr_flags     = PR_ATOMIC|PR_ADDR|PR_MPSYSCTL,
  .pr_input     = carp_proto_input,
  .pr_ctloutput = rip_ctloutput,
  .pr_usrreqs   = &rip_usrreqs,
#ifndef SMALL_KERNEL
  .pr_sysctl    = carp_sysctl
#endif /* SMALL_KERNEL */
},
#endif /* NCARP > 0 */
#if NPFSYNC > 0
{
  .pr_type      = SOCK_RAW,
  .pr_domain    = &inetdomain,
  .pr_protocol  = IPPROTO_PFSYNC,
  .pr_flags     = PR_ATOMIC|PR_ADDR|PR_MPSYSCTL,
  .pr_input     = pfsync_input4,
  .pr_ctloutput = rip_ctloutput,
  .pr_usrreqs   = &rip_usrreqs,
#ifndef SMALL_KERNEL
  .pr_sysctl    = pfsync_sysctl
#endif /* SMALL_KERNEL */
},
#endif /* NPFSYNC > 0 */
#if NPF > 0
{
  .pr_type      = SOCK_RAW,
  .pr_domain    = &inetdomain,
  .pr_protocol  = IPPROTO_DIVERT,
  .pr_flags     = PR_ATOMIC|PR_ADDR|PR_MPSYSCTL,
  .pr_ctloutput = rip_ctloutput,
  .pr_usrreqs   = &divert_usrreqs,
  .pr_init      = divert_init,
#ifndef SMALL_KERNEL
  .pr_sysctl    = divert_sysctl
#endif /* SMALL_KERNEL */
},
#endif /* NPF > 0 */
#if NETHERIP > 0
{
  .pr_type      = SOCK_RAW,
  .pr_domain    = &inetdomain,
  .pr_protocol  = IPPROTO_ETHERIP,
  .pr_flags     = PR_ATOMIC|PR_ADDR|PR_MPSYSCTL,
  .pr_input     = ip_etherip_input,
  .pr_ctloutput = rip_ctloutput,
  .pr_usrreqs   = &rip_usrreqs,
#ifndef SMALL_KERNEL
  .pr_sysctl    = etherip_sysctl
#endif /* SMALL_KERNEL */
},
#endif /* NETHERIP */
{
  /* raw wildcard */
  .pr_type      = SOCK_RAW,
  .pr_domain    = &inetdomain,
  .pr_flags     = PR_ATOMIC|PR_ADDR|PR_MPINPUT,
  .pr_input     = rip_input,
  .pr_ctloutput = rip_ctloutput,
  .pr_usrreqs   = &rip_usrreqs,
  .pr_init      = rip_init
}
};

const struct domain inetdomain = {
  .dom_family = AF_INET,
  .dom_name = "inet",
  .dom_init = in_init,
  .dom_protosw = inetsw,
  .dom_protoswNPROTOSW = &inetsw[nitems(inetsw)],
  .dom_sasize = sizeof(struct sockaddr_in),
  .dom_rtoffset = offsetof(struct sockaddr_in, sin_addr),
  .dom_maxplen = 32
};