FreeBSD/Linux Kernel Cross Reference
sys/netinet/in_proto.c

     /*-
      * SPDX-License-Identifier: BSD-3-Clause
      *
      * 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.
     *
     *      @(#)in_proto.c  8.2 (Berkeley) 2/9/95
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD$");
    
    #include "opt_mrouting.h"
    #include "opt_ipsec.h"
    #include "opt_inet.h"
    #include "opt_inet6.h"
    #include "opt_sctp.h"
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/kernel.h>
    #include <sys/malloc.h>
    #include <sys/socket.h>
    #include <sys/domain.h>
    #include <sys/proc.h>
    #include <sys/protosw.h>
    #include <sys/queue.h>
    #include <sys/sysctl.h>
    
    #include <net/if.h>
    #include <net/if_var.h>
    #include <netinet/in.h>
    #include <netinet/in_var.h>
    
    /*
     * While this file provides the domain and protocol switch tables for IPv4, it
     * also provides the sysctl node declarations for net.inet.* often shared with
     * IPv6 for common features or by upper layer protocols.  In case of no IPv4
     * support compile out everything but these sysctl nodes.
     */
    #ifdef INET
    /* netinet/raw_ip.c */
    extern struct protosw rip_protosw;
    /* netinet/udp_usrreq.c */
    extern struct protosw udp_protosw, udplite_protosw;
    /* netinet/tcp_usrreq.c */
    extern struct protosw tcp_protosw;
    /* netinet/sctp_usrreq.c */
    extern struct protosw sctp_seqpacket_protosw, sctp_stream_protosw;
    
    FEATURE(inet, "Internet Protocol version 4");
    
    struct domain inetdomain = {
            .dom_family =           AF_INET,
            .dom_name =             "internet",
            .dom_rtattach =         in_inithead,
    #ifdef VIMAGE
            .dom_rtdetach =         in_detachhead,
    #endif
            .dom_ifattach =         in_domifattach,
            .dom_ifdetach =         in_domifdetach,
            .dom_nprotosw =         14,
            .dom_protosw = {
                    &tcp_protosw,
                    &udp_protosw,
    #ifdef SCTP
                    &sctp_seqpacket_protosw,
                    &sctp_stream_protosw,
    #else
                    NULL, NULL,
    #endif
                    &udplite_protosw,
                    &rip_protosw,
                    /* Spacer 8 times for loadable protocols. XXXGL: why 8? */
                    NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
           },
   };
   
   DOMAIN_SET(inet);
   #endif /* INET */
   
   SYSCTL_NODE(_net, PF_INET, inet, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
       "Internet Family");
   
   SYSCTL_NODE(_net_inet, IPPROTO_IP, ip, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
       "IP");
   SYSCTL_NODE(_net_inet, IPPROTO_ICMP, icmp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
       "ICMP");
   SYSCTL_NODE(_net_inet, IPPROTO_UDP, udp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
       "UDP");
   SYSCTL_NODE(_net_inet, IPPROTO_TCP, tcp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
       "TCP");
   #if defined(SCTP) || defined(SCTP_SUPPORT)
   SYSCTL_NODE(_net_inet, IPPROTO_SCTP, sctp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
       "SCTP");
   #endif
   SYSCTL_NODE(_net_inet, IPPROTO_IGMP, igmp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
       "IGMP");
   #if defined(IPSEC) || defined(IPSEC_SUPPORT)
   /* XXX no protocol # to use, pick something "reserved" */
   SYSCTL_NODE(_net_inet, 253, ipsec, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
       "IPSEC");
   SYSCTL_NODE(_net_inet, IPPROTO_AH, ah, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
       "AH");
   SYSCTL_NODE(_net_inet, IPPROTO_ESP, esp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
       "ESP");
   SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP, ipcomp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
       "IPCOMP");
   SYSCTL_NODE(_net_inet, IPPROTO_IPIP, ipip, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
       "IPIP");
   #endif /* IPSEC */
   SYSCTL_NODE(_net_inet, IPPROTO_RAW, raw, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
       "RAW");
   SYSCTL_NODE(_net_inet, OID_AUTO, accf, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
       "Accept filters");

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