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  * 3. All advertising materials mentioning features or use of this software
   14  *    must display the following acknowledgement:
   15  *      This product includes software developed by the University of
   16  *      California, Berkeley and its contributors.
   17  * 4. Neither the name of the University nor the names of its contributors
   18  *    may be used to endorse or promote products derived from this software
   19  *    without specific prior written permission.
   20  *
   21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   31  * SUCH DAMAGE.
   32  *
   33  *      @(#)in_proto.c  8.2 (Berkeley) 2/9/95
   34  * $FreeBSD: src/sys/netinet/in_proto.c,v 1.64 2003/03/05 19:24:23 peter Exp $
   35  */
   36 
   37 #include "opt_ipdivert.h"
   38 #include "opt_ipx.h"
   39 #include "opt_ipsec.h"
   40 #include "opt_inet6.h"
   41 
   42 #include <sys/param.h>
   43 #include <sys/systm.h>
   44 #include <sys/kernel.h>
   45 #include <sys/socket.h>
   46 #include <sys/domain.h>
   47 #include <sys/protosw.h>
   48 #include <sys/queue.h>
   49 #include <sys/sysctl.h>
   50 
   51 #include <net/if.h>
   52 #include <net/route.h>
   53 
   54 #include <netinet/in.h>
   55 #include <netinet/in_systm.h>
   56 #include <netinet/ip.h>
   57 #include <netinet/ip_var.h>
   58 #include <netinet/ip_icmp.h>
   59 #include <netinet/igmp_var.h>
   60 #include <netinet/tcp.h>
   61 #include <netinet/tcp_timer.h>
   62 #include <netinet/tcp_var.h>
   63 #include <netinet/udp.h>
   64 #include <netinet/udp_var.h>
   65 #include <netinet/ip_encap.h>
   66 
   67 /*
   68  * TCP/IP protocol family: IP, ICMP, UDP, TCP.
   69  */
   70 
   71 #ifdef IPSEC
   72 #include <netinet6/ipsec.h>
   73 #include <netinet6/ah.h>
   74 #ifdef IPSEC_ESP
   75 #include <netinet6/esp.h>
   76 #endif
   77 #include <netinet6/ipcomp.h>
   78 #endif /* IPSEC */
   79 
   80 #ifdef FAST_IPSEC
   81 #include <netipsec/ipsec.h>
   82 #endif /* FAST_IPSEC */
   83 
   84 #ifdef IPXIP
   85 #include <netipx/ipx_ip.h>
   86 #endif
   87 
   88 extern  struct domain inetdomain;
   89 static  struct pr_usrreqs nousrreqs;
   90 
   91 struct protosw inetsw[] = {
   92 { 0,            &inetdomain,    0,              0,
   93   0,            0,              0,              0,
   94   0,
   95   ip_init,      0,              ip_slowtimo,    ip_drain,
   96   &nousrreqs
   97 },
   98 { SOCK_DGRAM,   &inetdomain,    IPPROTO_UDP,    PR_ATOMIC|PR_ADDR,
   99   udp_input,    0,              udp_ctlinput,   ip_ctloutput,
  100   0,
  101   udp_init,     0,              0,              0,
  102   &udp_usrreqs
  103 },
  104 { SOCK_STREAM,  &inetdomain,    IPPROTO_TCP,
  105         PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD,
  106   tcp_input,    0,              tcp_ctlinput,   tcp_ctloutput,
  107   0,
  108   tcp_init,     0,              tcp_slowtimo,   tcp_drain,
  109   &tcp_usrreqs
  110 },
  111 { SOCK_RAW,     &inetdomain,    IPPROTO_RAW,    PR_ATOMIC|PR_ADDR,
  112   rip_input,    0,              rip_ctlinput,   rip_ctloutput,
  113   0,
  114   0,            0,              0,              0,
  115   &rip_usrreqs
  116 },
  117 { SOCK_RAW,     &inetdomain,    IPPROTO_ICMP,   PR_ATOMIC|PR_ADDR|PR_LASTHDR,
  118   icmp_input,   0,              0,              rip_ctloutput,
  119   0,
  120   0,            0,              0,              0,
  121   &rip_usrreqs
  122 },
  123 { SOCK_RAW,     &inetdomain,    IPPROTO_IGMP,   PR_ATOMIC|PR_ADDR|PR_LASTHDR,
  124   igmp_input,   0,              0,              rip_ctloutput,
  125   0,
  126   igmp_init,    igmp_fasttimo,  igmp_slowtimo,  0,
  127   &rip_usrreqs
  128 },
  129 { SOCK_RAW,     &inetdomain,    IPPROTO_RSVP,   PR_ATOMIC|PR_ADDR|PR_LASTHDR,
  130   rsvp_input,   0,              0,              rip_ctloutput,
  131   0,
  132   0,            0,              0,              0,
  133   &rip_usrreqs
  134 },
  135 #ifdef IPSEC
  136 { SOCK_RAW,     &inetdomain,    IPPROTO_AH,     PR_ATOMIC|PR_ADDR,
  137   ah4_input,    0,              0,              0,
  138   0,      
  139   0,            0,              0,              0,
  140   &nousrreqs
  141 },
  142 #ifdef IPSEC_ESP
  143 { SOCK_RAW,     &inetdomain,    IPPROTO_ESP,    PR_ATOMIC|PR_ADDR,
  144   esp4_input,   0,              0,              0,
  145   0,      
  146   0,            0,              0,              0,
  147   &nousrreqs
  148 },
  149 #endif
  150 { SOCK_RAW,     &inetdomain,    IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR,
  151   ipcomp4_input, 0,             0,              0,
  152   0,      
  153   0,            0,              0,              0,
  154   &nousrreqs
  155 },
  156 #endif /* IPSEC */
  157 #ifdef FAST_IPSEC
  158 { SOCK_RAW,     &inetdomain,    IPPROTO_AH,     PR_ATOMIC|PR_ADDR,
  159   ah4_input,    0,              0,              0,
  160   0,      
  161   0,            0,              0,              0,
  162   &nousrreqs
  163 },
  164 { SOCK_RAW,     &inetdomain,    IPPROTO_ESP,    PR_ATOMIC|PR_ADDR,
  165   esp4_input,   0,              0,              0,
  166   0,      
  167   0,            0,              0,              0,
  168   &nousrreqs
  169 },
  170 { SOCK_RAW,     &inetdomain,    IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR,
  171   ipcomp4_input,        0,              0,              0,
  172   0,      
  173   0,            0,              0,              0,
  174   &nousrreqs
  175 },
  176 #endif /* FAST_IPSEC */
  177 { SOCK_RAW,     &inetdomain,    IPPROTO_IPV4,   PR_ATOMIC|PR_ADDR|PR_LASTHDR,
  178   encap4_input, 0,              0,              rip_ctloutput,
  179   0,
  180   encap_init,           0,              0,              0,
  181   &rip_usrreqs
  182 },
  183 { SOCK_RAW,     &inetdomain,    IPPROTO_MOBILE, PR_ATOMIC|PR_ADDR|PR_LASTHDR,
  184   encap4_input, 0,              0,              rip_ctloutput,
  185   0,
  186   encap_init,   0,              0,              0,
  187   &rip_usrreqs
  188 },
  189 { SOCK_RAW,     &inetdomain,    IPPROTO_GRE,    PR_ATOMIC|PR_ADDR|PR_LASTHDR,
  190   encap4_input, 0,              0,              rip_ctloutput,
  191   0,
  192   encap_init,   0,              0,              0,
  193   &rip_usrreqs
  194 },
  195 # ifdef INET6
  196 { SOCK_RAW,     &inetdomain,    IPPROTO_IPV6,   PR_ATOMIC|PR_ADDR|PR_LASTHDR,
  197   encap4_input, 0,              0,              rip_ctloutput,
  198   0,
  199   encap_init,   0,              0,              0,
  200   &rip_usrreqs
  201 },
  202 #endif
  203 #ifdef IPDIVERT
  204 { SOCK_RAW,     &inetdomain,    IPPROTO_DIVERT, PR_ATOMIC|PR_ADDR,
  205   div_input,    0,              0,              ip_ctloutput,
  206   0,
  207   div_init,     0,              0,              0,
  208   &div_usrreqs,
  209 },
  210 #endif
  211 #ifdef IPXIP
  212 { SOCK_RAW,     &inetdomain,    IPPROTO_IDP,    PR_ATOMIC|PR_ADDR|PR_LASTHDR,
  213   ipxip_input,  0,              ipxip_ctlinput, 0,
  214   0,
  215   0,            0,              0,              0,
  216   &rip_usrreqs
  217 },
  218 #endif
  219         /* raw wildcard */
  220 { SOCK_RAW,     &inetdomain,    0,              PR_ATOMIC|PR_ADDR,
  221   rip_input,    0,              0,              rip_ctloutput,
  222   0,
  223   rip_init,     0,              0,              0,
  224   &rip_usrreqs
  225 },
  226 };
  227 
  228 extern int in_inithead(void **, int);
  229 
  230 struct domain inetdomain =
  231     { AF_INET, "internet", 0, 0, 0, 
  232       inetsw,
  233       &inetsw[sizeof(inetsw)/sizeof(inetsw[0])], 0,
  234       in_inithead, 32, sizeof(struct sockaddr_in)
  235     };
  236 
  237 DOMAIN_SET(inet);
  238 
  239 SYSCTL_NODE(_net,      PF_INET,         inet,   CTLFLAG_RW, 0,
  240         "Internet Family");
  241 
  242 SYSCTL_NODE(_net_inet, IPPROTO_IP,      ip,     CTLFLAG_RW, 0,  "IP");
  243 SYSCTL_NODE(_net_inet, IPPROTO_ICMP,    icmp,   CTLFLAG_RW, 0,  "ICMP");
  244 SYSCTL_NODE(_net_inet, IPPROTO_UDP,     udp,    CTLFLAG_RW, 0,  "UDP");
  245 SYSCTL_NODE(_net_inet, IPPROTO_TCP,     tcp,    CTLFLAG_RW, 0,  "TCP");
  246 SYSCTL_NODE(_net_inet, IPPROTO_IGMP,    igmp,   CTLFLAG_RW, 0,  "IGMP");
  247 #ifdef FAST_IPSEC
  248 /* XXX no protocol # to use, pick something "reserved" */
  249 SYSCTL_NODE(_net_inet, 253,             ipsec,  CTLFLAG_RW, 0,  "IPSEC");
  250 SYSCTL_NODE(_net_inet, IPPROTO_AH,      ah,     CTLFLAG_RW, 0,  "AH");
  251 SYSCTL_NODE(_net_inet, IPPROTO_ESP,     esp,    CTLFLAG_RW, 0,  "ESP");
  252 SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP,  ipcomp, CTLFLAG_RW, 0,  "IPCOMP");
  253 SYSCTL_NODE(_net_inet, IPPROTO_IPIP,    ipip,   CTLFLAG_RW, 0,  "IPIP");
  254 #else
  255 #ifdef IPSEC
  256 SYSCTL_NODE(_net_inet, IPPROTO_AH,      ipsec,  CTLFLAG_RW, 0,  "IPSEC");
  257 #endif /* IPSEC */
  258 #endif /* !FAST_IPSEC */
  259 SYSCTL_NODE(_net_inet, IPPROTO_RAW,     raw,    CTLFLAG_RW, 0,  "RAW");
  260 #ifdef IPDIVERT
  261 SYSCTL_NODE(_net_inet, IPPROTO_DIVERT,  divert, CTLFLAG_RW, 0,  "DIVERT");
  262 #endif
  263 

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