sys/netinet/in_proto.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-3-Clause
   3  *
   4  * Copyright (c) 1982, 1986, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 #include "opt_mrouting.h"
  34 #include "opt_ipsec.h"
  35 #include "opt_inet.h"
  36 #include "opt_inet6.h"
  37 #include "opt_sctp.h"
  38
  39 #include <sys/param.h>
  40 #include <sys/systm.h>
  41 #include <sys/kernel.h>
  42 #include <sys/malloc.h>
  43 #include <sys/socket.h>
  44 #include <sys/domain.h>
  45 #include <sys/proc.h>
  46 #include <sys/protosw.h>
  47 #include <sys/queue.h>
  48 #include <sys/sysctl.h>
  49
  50 #include <net/if.h>
  51 #include <net/if_var.h>
  52 #include <netinet/in.h>
  53 #include <netinet/in_var.h>
  54
  55 /*
  56  * While this file provides the domain and protocol switch tables for IPv4, it
  57  * also provides the sysctl node declarations for net.inet.* often shared with
  58  * IPv6 for common features or by upper layer protocols.  In case of no IPv4
  59  * support compile out everything but these sysctl nodes.
  60  */
  61 #ifdef INET
  62 /* netinet/raw_ip.c */
  63 extern struct protosw rip_protosw;
  64 /* netinet/udp_usrreq.c */
  65 extern struct protosw udp_protosw, udplite_protosw;
  66 /* netinet/tcp_usrreq.c */
  67 extern struct protosw tcp_protosw;
  68 /* netinet/sctp_usrreq.c */
  69 extern struct protosw sctp_seqpacket_protosw, sctp_stream_protosw;
  70
  71 FEATURE(inet, "Internet Protocol version 4");
  72
  73 struct domain inetdomain = {
  74         .dom_family =           AF_INET,
  75         .dom_name =             "internet",
  76         .dom_rtattach =         in_inithead,
  77 #ifdef VIMAGE
  78         .dom_rtdetach =         in_detachhead,
  79 #endif
  80         .dom_ifattach =         in_domifattach,
  81         .dom_ifdetach =         in_domifdetach,
  82         .dom_nprotosw =         14,
  83         .dom_protosw = {
  84                 &tcp_protosw,
  85                 &udp_protosw,
  86 #ifdef SCTP
  87                 &sctp_seqpacket_protosw,
  88                 &sctp_stream_protosw,
  89 #else
  90                 NULL, NULL,
  91 #endif
  92                 &udplite_protosw,
  93                 &rip_protosw,
  94                 /* Spacer 8 times for loadable protocols. XXXGL: why 8? */
  95                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
  96         },
  97 };
  98
  99 DOMAIN_SET(inet);
 100 #endif /* INET */
 101
 102 SYSCTL_NODE(_net, PF_INET, inet, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
 103     "Internet Family");
 104
 105 SYSCTL_NODE(_net_inet, IPPROTO_IP, ip, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
 106     "IP");
 107 SYSCTL_NODE(_net_inet, IPPROTO_ICMP, icmp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
 108     "ICMP");
 109 SYSCTL_NODE(_net_inet, IPPROTO_UDP, udp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
 110     "UDP");
 111 SYSCTL_NODE(_net_inet, IPPROTO_TCP, tcp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
 112     "TCP");
 113 #if defined(SCTP) || defined(SCTP_SUPPORT)
 114 SYSCTL_NODE(_net_inet, IPPROTO_SCTP, sctp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
 115     "SCTP");
 116 #endif
 117 SYSCTL_NODE(_net_inet, IPPROTO_IGMP, igmp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
 118     "IGMP");
 119 #if defined(IPSEC) || defined(IPSEC_SUPPORT)
 120 /* XXX no protocol # to use, pick something "reserved" */
 121 SYSCTL_NODE(_net_inet, 253, ipsec, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
 122     "IPSEC");
 123 SYSCTL_NODE(_net_inet, IPPROTO_AH, ah, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
 124     "AH");
 125 SYSCTL_NODE(_net_inet, IPPROTO_ESP, esp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
 126     "ESP");
 127 SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP, ipcomp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
 128     "IPCOMP");
 129 SYSCTL_NODE(_net_inet, IPPROTO_IPIP, ipip, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
 130     "IPIP");
 131 #endif /* IPSEC */
 132 SYSCTL_NODE(_net_inet, IPPROTO_RAW, raw, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
 133     "RAW");
 134 SYSCTL_NODE(_net_inet, OID_AUTO, accf, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
 135     "Accept filters");