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

     /*      $NetBSD: in_proto.c,v 1.68.4.1 2005/08/15 19:05:04 tron 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  8.2 (Berkeley) 2/9/95
     */
    
    #include <sys/cdefs.h>
    __KERNEL_RCSID(0, "$NetBSD: in_proto.c,v 1.68.4.1 2005/08/15 19:05:04 tron Exp $");
    
    #include "opt_mrouting.h"
    #include "opt_eon.h"                    /* ISO CLNL over IP */
    #include "opt_iso.h"                    /* ISO TP tunneled over IP */
    #include "opt_ns.h"                     /* NSIP: XNS tunneled over IP */
    #include "opt_inet.h"
    #include "opt_ipsec.h"
    #include "opt_pim.h"
    
    #include <sys/param.h>
    #include <sys/socket.h>
    #include <sys/protosw.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/ip.h>
    #include <netinet/ip_var.h>
    #include <netinet/ip_icmp.h>
    #include <netinet/in_pcb.h>
    
    #ifdef INET6
    #ifndef INET
    #include <netinet/in.h>
    #endif
    #include <netinet/ip6.h>
    #endif
    
    #include <netinet/igmp_var.h>
    #ifdef PIM
   #include <netinet/pim_var.h>
   #endif
   #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 <netinet/udp.h>
   #include <netinet/udp_var.h>
   #include <netinet/ip_encap.h>
   /*
    * TCP/IP protocol family: IP, ICMP, UDP, TCP.
    */
   
   #ifdef IPSEC
   #include <netinet6/ipsec.h>
   #include <netinet6/ah.h>
   #ifdef IPSEC_ESP
   #include <netinet6/esp.h>
   #endif
   #include <netinet6/ipcomp.h>
   #endif /* IPSEC */
   
   #ifdef FAST_IPSEC
   #include <netipsec/ipsec.h>
   #include <netipsec/key.h>
   #endif  /* FAST_IPSEC */
   
   #ifdef NSIP
   #include <netns/ns_var.h>
   #include <netns/idp_var.h>
   #endif /* NSIP */
   
   #ifdef TPIP
   #include <netiso/tp_param.h>
   #include <netiso/tp_var.h>
   #endif /* TPIP */
   
   #ifdef EON
   #include <netiso/eonvar.h>
   #endif /* EON */
   
   #include "gre.h"
   #if NGRE > 0
   #include <netinet/ip_gre.h>
   #endif
   
   #include "bridge.h"
   
   DOMAIN_DEFINE(inetdomain);      /* forward declare and add to link set */
   
   const struct protosw inetsw[] = {
   { 0,            &inetdomain,    0,              0,
     0,            ip_output,      0,              0,
     0,
     ip_init,      0,              ip_slowtimo,    ip_drain,       NULL
   },
   { SOCK_DGRAM,   &inetdomain,    IPPROTO_UDP,    PR_ATOMIC|PR_ADDR|PR_PURGEIF,
     udp_input,    0,              udp_ctlinput,   udp_ctloutput,
     udp_usrreq,
     udp_init,     0,              0,              0,              NULL
   },
   { SOCK_STREAM,  &inetdomain,    IPPROTO_TCP,    PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN|PR_ABRTACPTDIS|PR_PURGEIF,
     tcp_input,    0,              tcp_ctlinput,   tcp_ctloutput,
     tcp_usrreq,
     tcp_init,     0,              tcp_slowtimo,   tcp_drain,      NULL
   },
   { SOCK_RAW,     &inetdomain,    IPPROTO_RAW,    PR_ATOMIC|PR_ADDR|PR_PURGEIF,
     rip_input,    rip_output,     rip_ctlinput,   rip_ctloutput,
     rip_usrreq,
     0,            0,              0,              0,
   },
   { SOCK_RAW,     &inetdomain,    IPPROTO_ICMP,   PR_ATOMIC|PR_ADDR|PR_LASTHDR,
     icmp_input,   rip_output,     rip_ctlinput,   rip_ctloutput,
     rip_usrreq,
     icmp_init,    0,              0,              0,              NULL
   },
   #ifdef IPSEC
   { SOCK_RAW,     &inetdomain,    IPPROTO_AH,     PR_ATOMIC|PR_ADDR,
     ah4_input,    0,              ah4_ctlinput,   0,
     0,
     0,            0,              0,              0,              NULL
   },
   #ifdef IPSEC_ESP
   { SOCK_RAW,     &inetdomain,    IPPROTO_ESP,    PR_ATOMIC|PR_ADDR,
     esp4_input,
           0,              esp4_ctlinput,  0,
     0,
     0,            0,              0,              0,              NULL
   },
   #endif
   { SOCK_RAW,     &inetdomain,    IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR,
     ipcomp4_input,
    0,             0,              0,
     0,
     0,            0,              0,              0,              NULL
   },
   #endif /* IPSEC */
   #ifdef FAST_IPSEC
   { SOCK_RAW,     &inetdomain,    IPPROTO_AH,     PR_ATOMIC|PR_ADDR,
     ipsec4_common_input,  0,              ah4_ctlinput,   0,
     0,
     0,            0,              0,              0,              NULL
   },
   { SOCK_RAW,     &inetdomain,    IPPROTO_ESP,    PR_ATOMIC|PR_ADDR,
     ipsec4_common_input,    0,            esp4_ctlinput,  0,
     0,
     0,            0,              0,              0,              NULL
   },
   { SOCK_RAW,     &inetdomain,    IPPROTO_IPCOMP, PR_ATOMIC|PR_ADDR,
     ipsec4_common_input,    0,            0,              0,
     0,
     0,            0,              0,              0,              NULL
   },
   #endif /* FAST_IPSEC */
   { SOCK_RAW,     &inetdomain,    IPPROTO_IPV4,   PR_ATOMIC|PR_ADDR|PR_LASTHDR,
     encap4_input, rip_output,     rip_ctlinput,   rip_ctloutput,
     rip_usrreq,   /*XXX*/
     encap_init,   0,              0,              0,
   },
   #ifdef INET6
   { SOCK_RAW,     &inetdomain,    IPPROTO_IPV6,   PR_ATOMIC|PR_ADDR|PR_LASTHDR,
     encap4_input, rip_output,     rip_ctlinput,   rip_ctloutput,
     rip_usrreq,   /*XXX*/
     encap_init,   0,              0,              0,
   },
   #endif /* INET6 */
   #if NBRIDGE > 0
   { SOCK_RAW,     &inetdomain,    IPPROTO_ETHERIP,        PR_ATOMIC|PR_ADDR|PR_LASTHDR,
     encap4_input, rip_output,     rip_ctlinput,   rip_ctloutput,
     rip_usrreq,
     encap_init,           0,              0,              0,
   },
   #endif
   #if NGRE > 0
   { SOCK_RAW,     &inetdomain,    IPPROTO_GRE,    PR_ATOMIC|PR_ADDR|PR_LASTHDR,
     gre_input,    rip_output,     rip_ctlinput,   rip_ctloutput,
     rip_usrreq,
     0,            0,              0,              0,
   },
   { SOCK_RAW,     &inetdomain,    IPPROTO_MOBILE, PR_ATOMIC|PR_ADDR|PR_LASTHDR,
     gre_mobile_input,     rip_output,     rip_ctlinput,   rip_ctloutput,
     rip_usrreq,
     0,            0,              0,              0,
   },
   #endif /* NGRE > 0 */
   { SOCK_RAW,     &inetdomain,    IPPROTO_IGMP,   PR_ATOMIC|PR_ADDR|PR_LASTHDR,
     igmp_input,   rip_output,     rip_ctlinput,   rip_ctloutput,
     rip_usrreq,
     NULL,         igmp_fasttimo,  igmp_slowtimo,  0,
   },
   #ifdef PIM
   { SOCK_RAW,     &inetdomain,    IPPROTO_PIM,    PR_ATOMIC|PR_ADDR|PR_LASTHDR,
     pim_input,    rip_output,     rip_ctlinput,   rip_ctloutput,
     rip_usrreq,
     NULL,         0,              0,              0,
   },
   #endif /* PIM */
   #ifdef TPIP
   { SOCK_SEQPACKET,&inetdomain,   IPPROTO_TP,     PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN|PR_LASTHDR|PR_ABRTACPTDIS,
     tpip_input,   0,              tpip_ctlinput,  tp_ctloutput,
     tp_usrreq,
     tp_init,      0,              tp_slowtimo,    tp_drain,
   },
   #endif /* TPIP */
   #ifdef ISO
   /* EON (ISO CLNL over IP) */
   #ifdef EON
   { SOCK_RAW,     &inetdomain,    IPPROTO_EON,    PR_LASTHDR,
     eoninput,     0,              eonctlinput,    0,
     0,
     eonprotoinit, 0,              0,              0,
   },
   #else
   { SOCK_RAW,     &inetdomain,    IPPROTO_EON,    PR_ATOMIC|PR_ADDR|PR_LASTHDR,
     encap4_input, rip_output,     rip_ctlinput,   rip_ctloutput,
     rip_usrreq,   /*XXX*/
     encap_init,   0,              0,              0,
   },
   #endif /* EON */
   #endif /* ISO */
   #ifdef NSIP
   { SOCK_RAW,     &inetdomain,    IPPROTO_IDP,    PR_ATOMIC|PR_ADDR|PR_LASTHDR,
     idpip_input,  NULL,           nsip_ctlinput,  0,
     rip_usrreq,
     0,            0,              0,              0,
   },
   #endif /* NSIP */
   /* raw wildcard */
   { SOCK_RAW,     &inetdomain,    0,              PR_ATOMIC|PR_ADDR|PR_LASTHDR,
     rip_input,    rip_output,     rip_ctlinput,   rip_ctloutput,
     rip_usrreq,
     rip_init,     0,              0,              0,
   },
   };
   
   struct domain inetdomain =
       { PF_INET, "internet", 0, 0, 0,
         inetsw, &inetsw[sizeof(inetsw)/sizeof(inetsw[0])],
         rn_inithead, 32, sizeof(struct sockaddr_in) };
   
   u_char  ip_protox[IPPROTO_MAX];
   
   int icmperrppslim = 100;                        /* 100pps */

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