FreeBSD/Linux Kernel Cross Reference
sys/netinet6/in6_proto.c

     /*      $NetBSD: in6_proto.c,v 1.56 2003/12/04 19:38:24 atatat Exp $    */
     /*      $KAME: in6_proto.c,v 1.66 2000/10/10 15:35:47 itojun Exp $      */
     
     /*
      * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
      * 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 project 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 PROJECT 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 PROJECT 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.
     */
    
    /*
     * 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  8.1 (Berkeley) 6/10/93
     */
    
    #include <sys/cdefs.h>
    __KERNEL_RCSID(0, "$NetBSD: in6_proto.c,v 1.56 2003/12/04 19:38:24 atatat Exp $");
    
    #include "opt_inet.h"
    #include "opt_ipsec.h"
    #include "opt_iso.h"
    
    #include <sys/param.h>
    #include <sys/socket.h>
    #include <sys/protosw.h>
    #include <sys/kernel.h>
    #include <sys/domain.h>
    #include <sys/mbuf.h>
    
    #include <net/if.h>
    #include <net/radix.h>
    #include <net/route.h>
    
    #include <netinet/in.h>
    #include <netinet/in_systm.h>
    #include <netinet/in_var.h>
    #include <netinet/ip_encap.h>
    #include <netinet/ip.h>
    #include <netinet/ip_var.h>
    #include <netinet/in_pcb.h>
    #include <netinet/ip6.h>
    #include <netinet6/ip6_var.h>
    #include <netinet/icmp6.h>
    #include <netinet6/in6_pcb.h>
    
    #include <netinet/tcp.h>
    #include <netinet/tcp_fsm.h>
    #include <netinet/tcp_seq.h>
    #include <netinet/tcp_timer.h>
    #include <netinet/tcp_var.h>
    #include <netinet/tcpip.h>
   #include <netinet/tcp_debug.h>
   
   #include <netinet6/udp6.h>
   #include <netinet6/udp6_var.h>
   
   #include <netinet6/pim6_var.h>
   
   #include <netinet6/nd6.h>
   
   #ifdef IPSEC
   #include <netinet6/ipsec.h>
   #include <netinet6/ah.h>
   #ifdef IPSEC_ESP
   #include <netinet6/esp.h>
   #endif
   #include <netinet6/ipcomp.h>
   #endif /* IPSEC */
   
   #include <netinet6/ip6protosw.h>
   
   #include <net/net_osdep.h>
   
   #ifndef offsetof                /* XXX */
   #define offsetof(type, member)  ((size_t)(&((type *)0)->member))
   #endif
   
   /*
    * TCP/IP protocol family: IP6, ICMP6, UDP, TCP.
    */
   
   extern  struct domain inet6domain;
   
   struct ip6protosw inet6sw[] = {
   { 0,            &inet6domain,   IPPROTO_IPV6,   0,
     0,            0,              0,              0,
     0,
     ip6_init,     0,              frag6_slowtimo, frag6_drain,
     NULL,
   },
   { SOCK_DGRAM,   &inet6domain,   IPPROTO_UDP,    PR_ATOMIC|PR_ADDR,
     udp6_input,   0,              udp6_ctlinput,  ip6_ctloutput,
     udp6_usrreq,  udp6_init,
     0,            0,              0,
     NULL,
   },
   { SOCK_STREAM,  &inet6domain,   IPPROTO_TCP,    PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN|PR_ABRTACPTDIS,
     tcp6_input,   0,              tcp6_ctlinput,  tcp_ctloutput,
     tcp_usrreq,
   #ifdef INET     /* don't call initialization and timeout routines twice */
     0,            0,              0,              0,
   #else
     tcp_init,     0,              tcp_slowtimo,   tcp_drain,
   #endif
     NULL,
   },
   { SOCK_RAW,     &inet6domain,   IPPROTO_RAW,    PR_ATOMIC|PR_ADDR,
     rip6_input,   rip6_output,    rip6_ctlinput,  rip6_ctloutput,
     rip6_usrreq,
     0,            0,              0,              0,
   },
   { SOCK_RAW,     &inet6domain,   IPPROTO_ICMPV6, PR_ATOMIC|PR_ADDR|PR_LASTHDR,
     icmp6_input,  rip6_output,    rip6_ctlinput,  rip6_ctloutput,
     rip6_usrreq,
     icmp6_init,   icmp6_fasttimo, 0,              0,
     NULL,
   },
   { SOCK_RAW,     &inet6domain,   IPPROTO_DSTOPTS,PR_ATOMIC|PR_ADDR,
     dest6_input,  0,              0,              0,
     0,
     0,            0,              0,              0,
   },
   { SOCK_RAW,     &inet6domain,   IPPROTO_ROUTING,PR_ATOMIC|PR_ADDR,
     route6_input, 0,              0,              0,
     0,
     0,            0,              0,              0,
   },
   { SOCK_RAW,     &inet6domain,   IPPROTO_FRAGMENT,PR_ATOMIC|PR_ADDR,
     frag6_input,  0,              0,              0,
     0,
     0,            0,              0,              0,
   },
   #ifdef IPSEC
   { SOCK_RAW,     &inet6domain,   IPPROTO_AH,     PR_ATOMIC|PR_ADDR,
     ah6_input,    0,              ah6_ctlinput,   0,
     0,
     0,            0,              0,              0,
     NULL,
   },
   #ifdef IPSEC_ESP
   { SOCK_RAW,     &inet6domain,   IPPROTO_ESP,    PR_ATOMIC|PR_ADDR,
     esp6_input,   0,              esp6_ctlinput,  0,
     0,
     0,            0,              0,              0,
     NULL,
   },
   #endif
   { SOCK_RAW,     &inet6domain,   IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR,
     ipcomp6_input, 0,             0,              0,
     0,
     0,            0,              0,              0,
     NULL,
   },
   #endif /* IPSEC */
   #ifdef INET
   { SOCK_RAW,     &inet6domain,   IPPROTO_IPV4,   PR_ATOMIC|PR_ADDR|PR_LASTHDR,
     encap6_input, rip6_output,    encap6_ctlinput, rip6_ctloutput,
     rip6_usrreq,
     encap_init,   0,              0,              0,
   },
   #endif
   { SOCK_RAW,     &inet6domain,   IPPROTO_IPV6,   PR_ATOMIC|PR_ADDR|PR_LASTHDR,
     encap6_input, rip6_output,    encap6_ctlinput, rip6_ctloutput,
     rip6_usrreq,
     encap_init,   0,              0,              0,
   },
   #ifdef ISO
   { SOCK_RAW,     &inet6domain,   IPPROTO_EON,    PR_ATOMIC|PR_ADDR|PR_LASTHDR,
     encap6_input, rip6_output,    encap6_ctlinput, rip6_ctloutput,
     rip6_usrreq,  /*XXX*/
     encap_init,   0,              0,              0,
   },
   #endif
   { SOCK_RAW,     &inet6domain,   IPPROTO_PIM,    PR_ATOMIC|PR_ADDR|PR_LASTHDR,
     pim6_input,   rip6_output,    0,              rip6_ctloutput,
     rip6_usrreq,
     0,            0,              0,              0,
   },
   /* raw wildcard */
   { SOCK_RAW,     &inet6domain,   0,              PR_ATOMIC|PR_ADDR|PR_LASTHDR,
     rip6_input,   rip6_output,    0,              rip6_ctloutput,
     rip6_usrreq,
     rip6_init,    0,              0,              0,
   },
   };
   
   struct domain inet6domain =
       { AF_INET6, "internet6", 0, 0, 0,
         (struct protosw *)inet6sw,
         (struct protosw *)&inet6sw[sizeof(inet6sw)/sizeof(inet6sw[0])], 0,
         rn_inithead,
         offsetof(struct sockaddr_in6, sin6_addr) << 3,
         sizeof(struct sockaddr_in6),
         in6_domifattach, in6_domifdetach, };
   
   /*
    * Internet configuration info
    */
   #ifndef IPV6FORWARDING
   #ifdef GATEWAY6
   #define IPV6FORWARDING  1       /* forward IP6 packets not for us */
   #else
   #define IPV6FORWARDING  0       /* don't forward IP6 packets not for us */
   #endif /* GATEWAY6 */
   #endif /* !IPV6FORWARDING */
   
   int     ip6_forwarding = IPV6FORWARDING;        /* act as router? */
   int     ip6_sendredirects = 1;
   int     ip6_defhlim = IPV6_DEFHLIM;
   int     ip6_defmcasthlim = IPV6_DEFAULT_MULTICAST_HOPS;
   int     ip6_accept_rtadv = 0;   /* "IPV6FORWARDING ? 0 : 1" is dangerous */
   int     ip6_maxfragpackets = 200;
   int     ip6_maxfrags = 200;
   int     ip6_log_interval = 5;
   int     ip6_hdrnestlimit = 50;  /* appropriate? */
   int     ip6_dad_count = 1;      /* DupAddrDetectionTransmits */
   int     ip6_auto_flowlabel = 1;
   int     ip6_use_deprecated = 1; /* allow deprecated addr (RFC2462 5.5.4) */
   int     ip6_rr_prune = 5;       /* router renumbering prefix
                                    * walk list every 5 sec. */
   int     ip6_v6only = 1;
   
   int     ip6_keepfaith = 0;
   time_t  ip6_log_time = (time_t)0L;
   
   /* icmp6 */
   /*
    * BSDI4 defines these variables in in_proto.c...
    * XXX: what if we don't define INET? Should we define pmtu6_expire
    * or so? (jinmei@kame.net 19990310)
    */
   int pmtu_expire = 60*10;
   
   /* raw IP6 parameters */
   /*
    * Nominal space allocated to a raw ip socket.
    */
   #define RIPV6SNDQ       8192
   #define RIPV6RCVQ       8192
   
   u_long  rip6_sendspace = RIPV6SNDQ;
   u_long  rip6_recvspace = RIPV6RCVQ;
   
   /* ICMPV6 parameters */
   int     icmp6_rediraccept = 1;          /* accept and process redirects */
   int     icmp6_redirtimeout = 10 * 60;   /* 10 minutes */
   int     icmp6errppslim = 100;           /* 100pps */
   int     icmp6_nodeinfo = 1;             /* enable/disable NI response */
   
   /* UDP on IP6 parameters */
   int     udp6_sendspace = 9216;          /* really max datagram size */
   int     udp6_recvspace = 40 * (1024 + sizeof(struct sockaddr_in6));
                                           /* 40 1K datagrams */

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