in_proto.c

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    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  *      @(#)in_proto.c  8.2 (Berkeley) 2/9/95
   32  */
   33 
   34 #include <sys/cdefs.h>
   35 __FBSDID("$FreeBSD: releng/12.0/sys/netinet/in_proto.c 334324 2018-05-29 12:32:08Z ae $");
   36 
   37 #include "opt_mrouting.h"
   38 #include "opt_ipsec.h"
   39 #include "opt_inet.h"
   40 #include "opt_inet6.h"
   41 #include "opt_sctp.h"
   42 #include "opt_mpath.h"
   43 
   44 #include <sys/param.h>
   45 #include <sys/systm.h>
   46 #include <sys/kernel.h>
   47 #include <sys/malloc.h>
   48 #include <sys/socket.h>
   49 #include <sys/domain.h>
   50 #include <sys/proc.h>
   51 #include <sys/protosw.h>
   52 #include <sys/queue.h>
   53 #include <sys/sysctl.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 #include <net/if.h>
   63 #include <net/if_var.h>
   64 #include <net/route.h>
   65 #ifdef RADIX_MPATH
   66 #include <net/radix_mpath.h>
   67 #endif
   68 #include <net/vnet.h>
   69 #endif /* INET */
   70 
   71 #if defined(INET) || defined(INET6)
   72 #include <netinet/in.h>
   73 #endif
   74 
   75 #ifdef INET
   76 #include <netinet/in_systm.h>
   77 #include <netinet/in_var.h>
   78 #include <netinet/ip.h>
   79 #include <netinet/ip_var.h>
   80 #include <netinet/ip_icmp.h>
   81 #include <netinet/igmp_var.h>
   82 #include <netinet/tcp.h>
   83 #include <netinet/tcp_timer.h>
   84 #include <netinet/tcp_var.h>
   85 #include <netinet/udp.h>
   86 #include <netinet/udp_var.h>
   87 #include <netinet/ip_encap.h>
   88 
   89 /*
   90  * TCP/IP protocol family: IP, ICMP, UDP, TCP.
   91  */
   92 
   93 static struct pr_usrreqs nousrreqs;
   94 
   95 #ifdef SCTP
   96 #include <netinet/in_pcb.h>
   97 #include <netinet/sctp_pcb.h>
   98 #include <netinet/sctp.h>
   99 #include <netinet/sctp_var.h>
  100 #endif /* SCTP */
  101 
  102 FEATURE(inet, "Internet Protocol version 4");
  103 
  104 extern  struct domain inetdomain;
  105 
  106 /* Spacer for loadable protocols. */
  107 #define IPPROTOSPACER                           \
  108 {                                               \
  109         .pr_domain =            &inetdomain,    \
  110         .pr_protocol =          PROTO_SPACER,   \
  111         .pr_usrreqs =           &nousrreqs      \
  112 }
  113 
  114 struct protosw inetsw[] = {
  115 {
  116         .pr_type =              0,
  117         .pr_domain =            &inetdomain,
  118         .pr_protocol =          IPPROTO_IP,
  119         .pr_init =              ip_init,
  120         .pr_slowtimo =          ip_slowtimo,
  121         .pr_drain =             ip_drain,
  122         .pr_usrreqs =           &nousrreqs
  123 },
  124 {
  125         .pr_type =              SOCK_DGRAM,
  126         .pr_domain =            &inetdomain,
  127         .pr_protocol =          IPPROTO_UDP,
  128         .pr_flags =             PR_ATOMIC|PR_ADDR,
  129         .pr_input =             udp_input,
  130         .pr_ctlinput =          udp_ctlinput,
  131         .pr_ctloutput =         udp_ctloutput,
  132         .pr_init =              udp_init,
  133         .pr_usrreqs =           &udp_usrreqs
  134 },
  135 {
  136         .pr_type =              SOCK_STREAM,
  137         .pr_domain =            &inetdomain,
  138         .pr_protocol =          IPPROTO_TCP,
  139         .pr_flags =             PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD,
  140         .pr_input =             tcp_input,
  141         .pr_ctlinput =          tcp_ctlinput,
  142         .pr_ctloutput =         tcp_ctloutput,
  143         .pr_init =              tcp_init,
  144         .pr_slowtimo =          tcp_slowtimo,
  145         .pr_drain =             tcp_drain,
  146         .pr_usrreqs =           &tcp_usrreqs
  147 },
  148 #ifdef SCTP
  149 { 
  150         .pr_type =              SOCK_SEQPACKET,
  151         .pr_domain =            &inetdomain,
  152         .pr_protocol =          IPPROTO_SCTP,
  153         .pr_flags =             PR_WANTRCVD|PR_LASTHDR,
  154         .pr_input =             sctp_input,
  155         .pr_ctlinput =          sctp_ctlinput,
  156         .pr_ctloutput =         sctp_ctloutput,
  157         .pr_init =              sctp_init,
  158         .pr_drain =             sctp_drain,
  159         .pr_usrreqs =           &sctp_usrreqs
  160 },
  161 { 
  162         .pr_type =              SOCK_STREAM,
  163         .pr_domain =            &inetdomain,
  164         .pr_protocol =          IPPROTO_SCTP,
  165         .pr_flags =             PR_CONNREQUIRED|PR_WANTRCVD|PR_LASTHDR,
  166         .pr_input =             sctp_input,
  167         .pr_ctlinput =          sctp_ctlinput,
  168         .pr_ctloutput =         sctp_ctloutput,
  169         .pr_drain =             sctp_drain,
  170         .pr_usrreqs =           &sctp_usrreqs
  171 },
  172 #endif /* SCTP */
  173 {
  174         .pr_type =              SOCK_DGRAM,
  175         .pr_domain =            &inetdomain,
  176         .pr_protocol =          IPPROTO_UDPLITE,
  177         .pr_flags =             PR_ATOMIC|PR_ADDR,
  178         .pr_input =             udp_input,
  179         .pr_ctlinput =          udplite_ctlinput,
  180         .pr_ctloutput =         udp_ctloutput,
  181         .pr_init =              udplite_init,
  182         .pr_usrreqs =           &udp_usrreqs
  183 },
  184 {
  185         .pr_type =              SOCK_RAW,
  186         .pr_domain =            &inetdomain,
  187         .pr_protocol =          IPPROTO_RAW,
  188         .pr_flags =             PR_ATOMIC|PR_ADDR,
  189         .pr_input =             rip_input,
  190         .pr_ctlinput =          rip_ctlinput,
  191         .pr_ctloutput =         rip_ctloutput,
  192         .pr_usrreqs =           &rip_usrreqs
  193 },
  194 {
  195         .pr_type =              SOCK_RAW,
  196         .pr_domain =            &inetdomain,
  197         .pr_protocol =          IPPROTO_ICMP,
  198         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
  199         .pr_input =             icmp_input,
  200         .pr_ctloutput =         rip_ctloutput,
  201         .pr_usrreqs =           &rip_usrreqs
  202 },
  203 {
  204         .pr_type =              SOCK_RAW,
  205         .pr_domain =            &inetdomain,
  206         .pr_protocol =          IPPROTO_IGMP,
  207         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
  208         .pr_input =             igmp_input,
  209         .pr_ctloutput =         rip_ctloutput,
  210         .pr_fasttimo =          igmp_fasttimo,
  211         .pr_slowtimo =          igmp_slowtimo,
  212         .pr_usrreqs =           &rip_usrreqs
  213 },
  214 {
  215         .pr_type =              SOCK_RAW,
  216         .pr_domain =            &inetdomain,
  217         .pr_protocol =          IPPROTO_RSVP,
  218         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
  219         .pr_input =             rsvp_input,
  220         .pr_ctloutput =         rip_ctloutput,
  221         .pr_usrreqs =           &rip_usrreqs
  222 },
  223 {
  224         .pr_type =              SOCK_RAW,
  225         .pr_domain =            &inetdomain,
  226         .pr_protocol =          IPPROTO_IPV4,
  227         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
  228         .pr_input =             encap4_input,
  229         .pr_ctloutput =         rip_ctloutput,
  230         .pr_usrreqs =           &rip_usrreqs
  231 },
  232 {
  233         .pr_type =              SOCK_RAW,
  234         .pr_domain =            &inetdomain,
  235         .pr_protocol =          IPPROTO_MOBILE,
  236         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
  237         .pr_input =             encap4_input,
  238         .pr_ctloutput =         rip_ctloutput,
  239         .pr_usrreqs =           &rip_usrreqs
  240 },
  241 {
  242         .pr_type =              SOCK_RAW,
  243         .pr_domain =            &inetdomain,
  244         .pr_protocol =          IPPROTO_ETHERIP,
  245         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
  246         .pr_input =             encap4_input,
  247         .pr_ctloutput =         rip_ctloutput,
  248         .pr_usrreqs =           &rip_usrreqs
  249 },
  250 {
  251         .pr_type =              SOCK_RAW,
  252         .pr_domain =            &inetdomain,
  253         .pr_protocol =          IPPROTO_GRE,
  254         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
  255         .pr_input =             encap4_input,
  256         .pr_ctloutput =         rip_ctloutput,
  257         .pr_usrreqs =           &rip_usrreqs
  258 },
  259 # ifdef INET6
  260 {
  261         .pr_type =              SOCK_RAW,
  262         .pr_domain =            &inetdomain,
  263         .pr_protocol =          IPPROTO_IPV6,
  264         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
  265         .pr_input =             encap4_input,
  266         .pr_ctloutput =         rip_ctloutput,
  267         .pr_usrreqs =           &rip_usrreqs
  268 },
  269 #endif
  270 {
  271         .pr_type =              SOCK_RAW,
  272         .pr_domain =            &inetdomain,
  273         .pr_protocol =          IPPROTO_PIM,
  274         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
  275         .pr_input =             encap4_input,
  276         .pr_ctloutput =         rip_ctloutput,
  277         .pr_usrreqs =           &rip_usrreqs
  278 },
  279 /* Spacer n-times for loadable protocols. */
  280 IPPROTOSPACER,
  281 IPPROTOSPACER,
  282 IPPROTOSPACER,
  283 IPPROTOSPACER,
  284 IPPROTOSPACER,
  285 IPPROTOSPACER,
  286 IPPROTOSPACER,
  287 IPPROTOSPACER,
  288 /* raw wildcard */
  289 {
  290         .pr_type =              SOCK_RAW,
  291         .pr_domain =            &inetdomain,
  292         .pr_flags =             PR_ATOMIC|PR_ADDR,
  293         .pr_input =             rip_input,
  294         .pr_ctloutput =         rip_ctloutput,
  295         .pr_init =              rip_init,
  296         .pr_usrreqs =           &rip_usrreqs
  297 },
  298 };
  299 
  300 extern int in_inithead(void **, int);
  301 extern int in_detachhead(void **, int);
  302 
  303 struct domain inetdomain = {
  304         .dom_family =           AF_INET,
  305         .dom_name =             "internet",
  306         .dom_protosw =          inetsw,
  307         .dom_protoswNPROTOSW =  &inetsw[nitems(inetsw)],
  308 #ifdef RADIX_MPATH
  309         .dom_rtattach =         rn4_mpath_inithead,
  310 #else
  311         .dom_rtattach =         in_inithead,
  312 #endif
  313 #ifdef VIMAGE
  314         .dom_rtdetach =         in_detachhead,
  315 #endif
  316         .dom_ifattach =         in_domifattach,
  317         .dom_ifdetach =         in_domifdetach
  318 };
  319 
  320 VNET_DOMAIN_SET(inet);
  321 #endif /* INET */
  322 
  323 SYSCTL_NODE(_net,      PF_INET,         inet,   CTLFLAG_RW, 0,
  324         "Internet Family");
  325 
  326 SYSCTL_NODE(_net_inet, IPPROTO_IP,      ip,     CTLFLAG_RW, 0,  "IP");
  327 SYSCTL_NODE(_net_inet, IPPROTO_ICMP,    icmp,   CTLFLAG_RW, 0,  "ICMP");
  328 SYSCTL_NODE(_net_inet, IPPROTO_UDP,     udp,    CTLFLAG_RW, 0,  "UDP");
  329 SYSCTL_NODE(_net_inet, IPPROTO_TCP,     tcp,    CTLFLAG_RW, 0,  "TCP");
  330 #ifdef SCTP
  331 SYSCTL_NODE(_net_inet, IPPROTO_SCTP,    sctp,   CTLFLAG_RW, 0,  "SCTP");
  332 #endif
  333 SYSCTL_NODE(_net_inet, IPPROTO_IGMP,    igmp,   CTLFLAG_RW, 0,  "IGMP");
  334 #if defined(IPSEC) || defined(IPSEC_SUPPORT)
  335 /* XXX no protocol # to use, pick something "reserved" */
  336 SYSCTL_NODE(_net_inet, 253,             ipsec,  CTLFLAG_RW, 0,  "IPSEC");
  337 SYSCTL_NODE(_net_inet, IPPROTO_AH,      ah,     CTLFLAG_RW, 0,  "AH");
  338 SYSCTL_NODE(_net_inet, IPPROTO_ESP,     esp,    CTLFLAG_RW, 0,  "ESP");
  339 SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP,  ipcomp, CTLFLAG_RW, 0,  "IPCOMP");
  340 SYSCTL_NODE(_net_inet, IPPROTO_IPIP,    ipip,   CTLFLAG_RW, 0,  "IPIP");
  341 #endif /* IPSEC */
  342 SYSCTL_NODE(_net_inet, IPPROTO_RAW,     raw,    CTLFLAG_RW, 0,  "RAW");
  343 SYSCTL_NODE(_net_inet, OID_AUTO,        accf,   CTLFLAG_RW, 0,
  344     "Accept filters");
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FreeBSD/Linux Kernel Cross Reference sys/netinet/in_proto.c

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