The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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

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    1 /*-
    2  * Copyright (c) 1982, 1986, 1993
    3  *      The Regents of the University of California.  All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 4. Neither the name of the University nor the names of its contributors
   14  *    may be used to endorse or promote products derived from this software
   15  *    without specific prior written permission.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   27  * SUCH DAMAGE.
   28  *
   29  *      @(#)in_proto.c  8.2 (Berkeley) 2/9/95
   30  */
   31 
   32 #include <sys/cdefs.h>
   33 __FBSDID("$FreeBSD$");
   34 
   35 #include "opt_ipx.h"
   36 #include "opt_mrouting.h"
   37 #include "opt_ipsec.h"
   38 #include "opt_inet6.h"
   39 #include "opt_pf.h"
   40 #include "opt_sctp.h"
   41 #include "opt_mpath.h"
   42 
   43 #include <sys/param.h>
   44 #include <sys/systm.h>
   45 #include <sys/kernel.h>
   46 #include <sys/socket.h>
   47 #include <sys/domain.h>
   48 #include <sys/proc.h>
   49 #include <sys/protosw.h>
   50 #include <sys/queue.h>
   51 #include <sys/sysctl.h>
   52 
   53 #include <net/if.h>
   54 #include <net/route.h>
   55 #ifdef RADIX_MPATH
   56 #include <net/radix_mpath.h>
   57 #endif
   58 #include <net/vnet.h>
   59 
   60 #include <netinet/in.h>
   61 #include <netinet/in_systm.h>
   62 #include <netinet/in_var.h>
   63 #include <netinet/ip.h>
   64 #include <netinet/ip_var.h>
   65 #include <netinet/ip_icmp.h>
   66 #include <netinet/igmp_var.h>
   67 #include <netinet/tcp.h>
   68 #include <netinet/tcp_timer.h>
   69 #include <netinet/tcp_var.h>
   70 #include <netinet/udp.h>
   71 #include <netinet/udp_var.h>
   72 #include <netinet/ip_encap.h>
   73 
   74 /*
   75  * TCP/IP protocol family: IP, ICMP, UDP, TCP.
   76  */
   77 
   78 static struct pr_usrreqs nousrreqs;
   79 
   80 #ifdef IPSEC
   81 #include <netipsec/ipsec.h>
   82 #endif /* IPSEC */
   83 
   84 #ifdef SCTP
   85 #include <netinet/in_pcb.h>
   86 #include <netinet/sctp_pcb.h>
   87 #include <netinet/sctp.h>
   88 #include <netinet/sctp_var.h>
   89 #endif /* SCTP */
   90 
   91 #ifdef DEV_PFSYNC
   92 #include <net/pfvar.h>
   93 #include <net/if_pfsync.h>
   94 #endif
   95 
   96 FEATURE(inet, "Internet Protocol version 4");
   97 
   98 extern  struct domain inetdomain;
   99 
  100 /* Spacer for loadable protocols. */
  101 #define IPPROTOSPACER                           \
  102 {                                               \
  103         .pr_domain =            &inetdomain,    \
  104         .pr_protocol =          PROTO_SPACER,   \
  105         .pr_usrreqs =           &nousrreqs      \
  106 }
  107 
  108 struct protosw inetsw[] = {
  109 {
  110         .pr_type =              0,
  111         .pr_domain =            &inetdomain,
  112         .pr_protocol =          IPPROTO_IP,
  113         .pr_init =              ip_init,
  114 #ifdef VIMAGE
  115         .pr_destroy =           ip_destroy,
  116 #endif
  117         .pr_slowtimo =          ip_slowtimo,
  118         .pr_drain =             ip_drain,
  119         .pr_usrreqs =           &nousrreqs
  120 },
  121 {
  122         .pr_type =              SOCK_DGRAM,
  123         .pr_domain =            &inetdomain,
  124         .pr_protocol =          IPPROTO_UDP,
  125         .pr_flags =             PR_ATOMIC|PR_ADDR,
  126         .pr_input =             udp_input,
  127         .pr_ctlinput =          udp_ctlinput,
  128         .pr_ctloutput =         udp_ctloutput,
  129         .pr_init =              udp_init,
  130 #ifdef VIMAGE
  131         .pr_destroy =           udp_destroy,
  132 #endif
  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 #ifdef VIMAGE
  145         .pr_destroy =           tcp_destroy,
  146 #endif
  147         .pr_slowtimo =          tcp_slowtimo,
  148         .pr_drain =             tcp_drain,
  149         .pr_usrreqs =           &tcp_usrreqs
  150 },
  151 #ifdef SCTP
  152 { 
  153         .pr_type =              SOCK_SEQPACKET,
  154         .pr_domain =            &inetdomain,
  155         .pr_protocol =          IPPROTO_SCTP,
  156         .pr_flags =             PR_WANTRCVD,
  157         .pr_input =             sctp_input,
  158         .pr_ctlinput =          sctp_ctlinput,
  159         .pr_ctloutput =         sctp_ctloutput,
  160         .pr_init =              sctp_init,
  161 #ifdef VIMAGE
  162         .pr_destroy =           sctp_finish,
  163 #endif
  164         .pr_drain =             sctp_drain,
  165         .pr_usrreqs =           &sctp_usrreqs
  166 },
  167 { 
  168         .pr_type =              SOCK_STREAM,
  169         .pr_domain =            &inetdomain,
  170         .pr_protocol =          IPPROTO_SCTP,
  171         .pr_flags =             PR_WANTRCVD,
  172         .pr_input =             sctp_input,
  173         .pr_ctlinput =          sctp_ctlinput,
  174         .pr_ctloutput =         sctp_ctloutput,
  175         .pr_drain =             sctp_drain,
  176         .pr_usrreqs =           &sctp_usrreqs
  177 },
  178 #endif /* SCTP */
  179 {
  180         .pr_type =              SOCK_RAW,
  181         .pr_domain =            &inetdomain,
  182         .pr_protocol =          IPPROTO_RAW,
  183         .pr_flags =             PR_ATOMIC|PR_ADDR,
  184         .pr_input =             rip_input,
  185         .pr_ctlinput =          rip_ctlinput,
  186         .pr_ctloutput =         rip_ctloutput,
  187         .pr_usrreqs =           &rip_usrreqs
  188 },
  189 {
  190         .pr_type =              SOCK_RAW,
  191         .pr_domain =            &inetdomain,
  192         .pr_protocol =          IPPROTO_ICMP,
  193         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
  194         .pr_input =             icmp_input,
  195         .pr_ctloutput =         rip_ctloutput,
  196         .pr_usrreqs =           &rip_usrreqs
  197 },
  198 {
  199         .pr_type =              SOCK_RAW,
  200         .pr_domain =            &inetdomain,
  201         .pr_protocol =          IPPROTO_IGMP,
  202         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
  203         .pr_input =             igmp_input,
  204         .pr_ctloutput =         rip_ctloutput,
  205         .pr_fasttimo =          igmp_fasttimo,
  206         .pr_slowtimo =          igmp_slowtimo,
  207         .pr_usrreqs =           &rip_usrreqs
  208 },
  209 {
  210         .pr_type =              SOCK_RAW,
  211         .pr_domain =            &inetdomain,
  212         .pr_protocol =          IPPROTO_RSVP,
  213         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
  214         .pr_input =             rsvp_input,
  215         .pr_ctloutput =         rip_ctloutput,
  216         .pr_usrreqs =           &rip_usrreqs
  217 },
  218 #ifdef IPSEC
  219 {
  220         .pr_type =              SOCK_RAW,
  221         .pr_domain =            &inetdomain,
  222         .pr_protocol =          IPPROTO_AH,
  223         .pr_flags =             PR_ATOMIC|PR_ADDR,
  224         .pr_input =             ah4_input,
  225         .pr_ctlinput =          ah4_ctlinput,
  226         .pr_usrreqs =           &nousrreqs
  227 },
  228 {
  229         .pr_type =              SOCK_RAW,
  230         .pr_domain =            &inetdomain,
  231         .pr_protocol =          IPPROTO_ESP,
  232         .pr_flags =             PR_ATOMIC|PR_ADDR,
  233         .pr_input =             esp4_input,
  234         .pr_ctlinput =          esp4_ctlinput,
  235         .pr_usrreqs =           &nousrreqs
  236 },
  237 {
  238         .pr_type =              SOCK_RAW,
  239         .pr_domain =            &inetdomain,
  240         .pr_protocol =          IPPROTO_IPCOMP,
  241         .pr_flags =             PR_ATOMIC|PR_ADDR,
  242         .pr_input =             ipcomp4_input,
  243         .pr_usrreqs =           &nousrreqs
  244 },
  245 #endif /* IPSEC */
  246 {
  247         .pr_type =              SOCK_RAW,
  248         .pr_domain =            &inetdomain,
  249         .pr_protocol =          IPPROTO_IPV4,
  250         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
  251         .pr_input =             encap4_input,
  252         .pr_ctloutput =         rip_ctloutput,
  253         .pr_init =              encap_init,
  254         .pr_usrreqs =           &rip_usrreqs
  255 },
  256 {
  257         .pr_type =              SOCK_RAW,
  258         .pr_domain =            &inetdomain,
  259         .pr_protocol =          IPPROTO_MOBILE,
  260         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
  261         .pr_input =             encap4_input,
  262         .pr_ctloutput =         rip_ctloutput,
  263         .pr_init =              encap_init,
  264         .pr_usrreqs =           &rip_usrreqs
  265 },
  266 {
  267         .pr_type =              SOCK_RAW,
  268         .pr_domain =            &inetdomain,
  269         .pr_protocol =          IPPROTO_ETHERIP,
  270         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
  271         .pr_input =             encap4_input,
  272         .pr_ctloutput =         rip_ctloutput,
  273         .pr_init =              encap_init,
  274         .pr_usrreqs =           &rip_usrreqs
  275 },
  276 {
  277         .pr_type =              SOCK_RAW,
  278         .pr_domain =            &inetdomain,
  279         .pr_protocol =          IPPROTO_GRE,
  280         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
  281         .pr_input =             encap4_input,
  282         .pr_ctloutput =         rip_ctloutput,
  283         .pr_init =              encap_init,
  284         .pr_usrreqs =           &rip_usrreqs
  285 },
  286 # ifdef INET6
  287 {
  288         .pr_type =              SOCK_RAW,
  289         .pr_domain =            &inetdomain,
  290         .pr_protocol =          IPPROTO_IPV6,
  291         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
  292         .pr_input =             encap4_input,
  293         .pr_ctloutput =         rip_ctloutput,
  294         .pr_init =              encap_init,
  295         .pr_usrreqs =           &rip_usrreqs
  296 },
  297 #endif
  298 {
  299         .pr_type =              SOCK_RAW,
  300         .pr_domain =            &inetdomain,
  301         .pr_protocol =          IPPROTO_PIM,
  302         .pr_flags =             PR_ATOMIC|PR_ADDR|PR_LASTHDR,
  303         .pr_input =             encap4_input,
  304         .pr_ctloutput =         rip_ctloutput,
  305         .pr_usrreqs =           &rip_usrreqs
  306 },
  307 #ifdef DEV_PFSYNC
  308 {
  309         .pr_type =              SOCK_RAW,
  310         .pr_domain =            &inetdomain,
  311         .pr_protocol =          IPPROTO_PFSYNC,
  312         .pr_flags =             PR_ATOMIC|PR_ADDR,
  313         .pr_input =             pfsync_input,
  314         .pr_ctloutput =         rip_ctloutput,
  315         .pr_usrreqs =           &rip_usrreqs
  316 },
  317 #endif  /* DEV_PFSYNC */
  318 /* Spacer n-times for loadable protocols. */
  319 IPPROTOSPACER,
  320 IPPROTOSPACER,
  321 IPPROTOSPACER,
  322 IPPROTOSPACER,
  323 IPPROTOSPACER,
  324 IPPROTOSPACER,
  325 IPPROTOSPACER,
  326 IPPROTOSPACER,
  327 /* raw wildcard */
  328 {
  329         .pr_type =              SOCK_RAW,
  330         .pr_domain =            &inetdomain,
  331         .pr_flags =             PR_ATOMIC|PR_ADDR,
  332         .pr_input =             rip_input,
  333         .pr_ctloutput =         rip_ctloutput,
  334         .pr_init =              rip_init,
  335 #ifdef VIMAGE
  336         .pr_destroy =           rip_destroy,
  337 #endif
  338         .pr_usrreqs =           &rip_usrreqs
  339 },
  340 };
  341 
  342 extern int in_inithead(void **, int);
  343 extern int in_detachhead(void **, int);
  344 
  345 struct domain inetdomain = {
  346         .dom_family =           AF_INET,
  347         .dom_name =             "internet",
  348         .dom_protosw =          inetsw,
  349         .dom_protoswNPROTOSW =  &inetsw[sizeof(inetsw)/sizeof(inetsw[0])],
  350 #ifdef RADIX_MPATH
  351         .dom_rtattach =         rn4_mpath_inithead,
  352 #else
  353         .dom_rtattach =         in_inithead,
  354 #endif
  355 #ifdef VIMAGE
  356         .dom_rtdetach =         in_detachhead,
  357 #endif
  358         .dom_rtoffset =         32,
  359         .dom_maxrtkey =         sizeof(struct sockaddr_in),
  360         .dom_ifattach =         in_domifattach,
  361         .dom_ifdetach =         in_domifdetach
  362 };
  363 
  364 VNET_DOMAIN_SET(inet);
  365 
  366 SYSCTL_NODE(_net,      PF_INET,         inet,   CTLFLAG_RW, 0,
  367         "Internet Family");
  368 
  369 SYSCTL_NODE(_net_inet, IPPROTO_IP,      ip,     CTLFLAG_RW, 0,  "IP");
  370 SYSCTL_NODE(_net_inet, IPPROTO_ICMP,    icmp,   CTLFLAG_RW, 0,  "ICMP");
  371 SYSCTL_NODE(_net_inet, IPPROTO_UDP,     udp,    CTLFLAG_RW, 0,  "UDP");
  372 SYSCTL_NODE(_net_inet, IPPROTO_TCP,     tcp,    CTLFLAG_RW, 0,  "TCP");
  373 #ifdef SCTP
  374 SYSCTL_NODE(_net_inet, IPPROTO_SCTP,    sctp,   CTLFLAG_RW, 0,  "SCTP");
  375 #endif
  376 SYSCTL_NODE(_net_inet, IPPROTO_IGMP,    igmp,   CTLFLAG_RW, 0,  "IGMP");
  377 #ifdef IPSEC
  378 /* XXX no protocol # to use, pick something "reserved" */
  379 SYSCTL_NODE(_net_inet, 253,             ipsec,  CTLFLAG_RW, 0,  "IPSEC");
  380 SYSCTL_NODE(_net_inet, IPPROTO_AH,      ah,     CTLFLAG_RW, 0,  "AH");
  381 SYSCTL_NODE(_net_inet, IPPROTO_ESP,     esp,    CTLFLAG_RW, 0,  "ESP");
  382 SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP,  ipcomp, CTLFLAG_RW, 0,  "IPCOMP");
  383 SYSCTL_NODE(_net_inet, IPPROTO_IPIP,    ipip,   CTLFLAG_RW, 0,  "IPIP");
  384 #endif /* IPSEC */
  385 SYSCTL_NODE(_net_inet, IPPROTO_RAW,     raw,    CTLFLAG_RW, 0,  "RAW");
  386 #ifdef DEV_PFSYNC
  387 SYSCTL_NODE(_net_inet, IPPROTO_PFSYNC,  pfsync, CTLFLAG_RW, 0,  "PFSYNC");
  388 #endif

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