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in_proto.c revision 1.106
      1  1.106  christos /*	$NetBSD: in_proto.c,v 1.106 2013/06/05 19:01:26 christos Exp $	*/
      2   1.32    itojun 
      3   1.32    itojun /*
      4   1.32    itojun  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
      5   1.32    itojun  * All rights reserved.
      6   1.56    itojun  *
      7   1.32    itojun  * Redistribution and use in source and binary forms, with or without
      8   1.32    itojun  * modification, are permitted provided that the following conditions
      9   1.32    itojun  * are met:
     10   1.32    itojun  * 1. Redistributions of source code must retain the above copyright
     11   1.32    itojun  *    notice, this list of conditions and the following disclaimer.
     12   1.32    itojun  * 2. Redistributions in binary form must reproduce the above copyright
     13   1.32    itojun  *    notice, this list of conditions and the following disclaimer in the
     14   1.32    itojun  *    documentation and/or other materials provided with the distribution.
     15   1.32    itojun  * 3. Neither the name of the project nor the names of its contributors
     16   1.32    itojun  *    may be used to endorse or promote products derived from this software
     17   1.32    itojun  *    without specific prior written permission.
     18   1.56    itojun  *
     19   1.32    itojun  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
     20   1.32    itojun  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21   1.32    itojun  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22   1.32    itojun  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
     23   1.32    itojun  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24   1.32    itojun  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25   1.32    itojun  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26   1.32    itojun  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27   1.32    itojun  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28   1.32    itojun  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29   1.32    itojun  * SUCH DAMAGE.
     30   1.32    itojun  */
     31    1.9       cgd 
     32    1.1       cgd /*
     33    1.8   mycroft  * Copyright (c) 1982, 1986, 1993
     34    1.8   mycroft  *	The Regents of the University of California.  All rights reserved.
     35    1.1       cgd  *
     36    1.1       cgd  * Redistribution and use in source and binary forms, with or without
     37    1.1       cgd  * modification, are permitted provided that the following conditions
     38    1.1       cgd  * are met:
     39    1.1       cgd  * 1. Redistributions of source code must retain the above copyright
     40    1.1       cgd  *    notice, this list of conditions and the following disclaimer.
     41    1.1       cgd  * 2. Redistributions in binary form must reproduce the above copyright
     42    1.1       cgd  *    notice, this list of conditions and the following disclaimer in the
     43    1.1       cgd  *    documentation and/or other materials provided with the distribution.
     44   1.59       agc  * 3. Neither the name of the University nor the names of its contributors
     45    1.1       cgd  *    may be used to endorse or promote products derived from this software
     46    1.1       cgd  *    without specific prior written permission.
     47    1.1       cgd  *
     48    1.1       cgd  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     49    1.1       cgd  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     50    1.1       cgd  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     51    1.1       cgd  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     52    1.1       cgd  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     53    1.1       cgd  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     54    1.1       cgd  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     55    1.1       cgd  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     56    1.1       cgd  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     57    1.1       cgd  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     58    1.1       cgd  * SUCH DAMAGE.
     59    1.1       cgd  *
     60   1.18   thorpej  *	@(#)in_proto.c	8.2 (Berkeley) 2/9/95
     61    1.1       cgd  */
     62   1.51     lukem 
     63   1.51     lukem #include <sys/cdefs.h>
     64  1.106  christos __KERNEL_RCSID(0, "$NetBSD: in_proto.c,v 1.106 2013/06/05 19:01:26 christos Exp $");
     65   1.19    scottr 
     66   1.19    scottr #include "opt_mrouting.h"
     67   1.32    itojun #include "opt_inet.h"
     68   1.33   thorpej #include "opt_ipsec.h"
     69   1.65      manu #include "opt_pim.h"
     70   1.97     pooka #include "opt_gateway.h"
     71    1.1       cgd 
     72    1.5   mycroft #include <sys/param.h>
     73    1.5   mycroft #include <sys/socket.h>
     74    1.5   mycroft #include <sys/protosw.h>
     75    1.5   mycroft #include <sys/domain.h>
     76    1.5   mycroft #include <sys/mbuf.h>
     77    1.1       cgd 
     78    1.8   mycroft #include <net/if.h>
     79    1.8   mycroft #include <net/radix.h>
     80    1.8   mycroft #include <net/route.h>
     81    1.8   mycroft 
     82    1.5   mycroft #include <netinet/in.h>
     83    1.5   mycroft #include <netinet/in_systm.h>
     84    1.8   mycroft #include <netinet/ip.h>
     85    1.8   mycroft #include <netinet/ip_var.h>
     86    1.8   mycroft #include <netinet/ip_icmp.h>
     87   1.78    dyoung #include <netinet/in_ifattach.h>
     88    1.8   mycroft #include <netinet/in_pcb.h>
     89   1.69      yamt #include <netinet/in_proto.h>
     90   1.32    itojun 
     91   1.32    itojun #ifdef INET6
     92   1.32    itojun #ifndef INET
     93   1.32    itojun #include <netinet/in.h>
     94   1.32    itojun #endif
     95   1.32    itojun #include <netinet/ip6.h>
     96   1.32    itojun #endif
     97   1.32    itojun 
     98    1.8   mycroft #include <netinet/igmp_var.h>
     99   1.65      manu #ifdef PIM
    100   1.65      manu #include <netinet/pim_var.h>
    101   1.65      manu #endif
    102    1.8   mycroft #include <netinet/tcp.h>
    103    1.8   mycroft #include <netinet/tcp_fsm.h>
    104    1.8   mycroft #include <netinet/tcp_seq.h>
    105    1.8   mycroft #include <netinet/tcp_timer.h>
    106    1.8   mycroft #include <netinet/tcp_var.h>
    107    1.8   mycroft #include <netinet/tcpip.h>
    108    1.8   mycroft #include <netinet/tcp_debug.h>
    109    1.8   mycroft #include <netinet/udp.h>
    110    1.8   mycroft #include <netinet/udp_var.h>
    111   1.39    itojun #include <netinet/ip_encap.h>
    112   1.79    rpaulo 
    113    1.1       cgd /*
    114    1.1       cgd  * TCP/IP protocol family: IP, ICMP, UDP, TCP.
    115    1.1       cgd  */
    116    1.1       cgd 
    117  1.106  christos #ifdef IPSEC
    118   1.61  jonathan #include <netipsec/ipsec.h>
    119   1.61  jonathan #include <netipsec/key.h>
    120  1.106  christos #endif	/* IPSEC */
    121   1.61  jonathan 
    122   1.72  liamjfoy #include "carp.h"
    123   1.72  liamjfoy #if NCARP > 0
    124   1.72  liamjfoy #include <netinet/ip_carp.h>
    125   1.72  liamjfoy #endif
    126   1.72  liamjfoy 
    127   1.98  degroote #include "pfsync.h"
    128   1.98  degroote #if NPFSYNC > 0
    129   1.98  degroote #include <net/pfvar.h>
    130   1.98  degroote #include <net/if_pfsync.h>
    131   1.98  degroote #endif
    132   1.98  degroote 
    133   1.79    rpaulo #include "etherip.h"
    134   1.79    rpaulo #if NETHERIP > 0
    135   1.79    rpaulo #include <netinet/ip_etherip.h>
    136   1.79    rpaulo #endif
    137   1.67       kim 
    138   1.66      matt DOMAIN_DEFINE(inetdomain);	/* forward declare and add to link set */
    139   1.66      matt 
    140   1.94        ad /* Wrappers to acquire kernel_lock. */
    141   1.94        ad 
    142   1.94        ad PR_WRAP_USRREQ(rip_usrreq)
    143   1.94        ad PR_WRAP_USRREQ(udp_usrreq)
    144   1.94        ad PR_WRAP_USRREQ(tcp_usrreq)
    145   1.94        ad 
    146   1.94        ad #define	rip_usrreq 	rip_usrreq_wrapper
    147   1.94        ad #define	udp_usrreq 	udp_usrreq_wrapper
    148   1.94        ad #define	tcp_usrreq 	tcp_usrreq_wrapper
    149   1.94        ad 
    150   1.94        ad PR_WRAP_CTLINPUT(rip_ctlinput)
    151   1.94        ad PR_WRAP_CTLINPUT(udp_ctlinput)
    152   1.94        ad PR_WRAP_CTLINPUT(tcp_ctlinput)
    153   1.94        ad 
    154   1.94        ad #define	rip_ctlinput	rip_ctlinput_wrapper
    155   1.94        ad #define	udp_ctlinput	udp_ctlinput_wrapper
    156   1.94        ad #define	tcp_ctlinput	tcp_ctlinput_wrapper
    157   1.94        ad 
    158   1.94        ad PR_WRAP_CTLOUTPUT(rip_ctloutput)
    159   1.94        ad PR_WRAP_CTLOUTPUT(udp_ctloutput)
    160   1.94        ad PR_WRAP_CTLOUTPUT(tcp_ctloutput)
    161   1.94        ad 
    162   1.94        ad #define	rip_ctloutput	rip_ctloutput_wrapper
    163   1.94        ad #define	udp_ctloutput	udp_ctloutput_wrapper
    164   1.94        ad #define	tcp_ctloutput	tcp_ctloutput_wrapper
    165   1.94        ad 
    166  1.106  christos #if defined(IPSEC)
    167   1.94        ad PR_WRAP_CTLINPUT(ah4_ctlinput)
    168   1.94        ad 
    169   1.94        ad #define	ah4_ctlinput	ah4_ctlinput_wrapper
    170   1.94        ad PR_WRAP_CTLINPUT(esp4_ctlinput)
    171   1.94        ad 
    172   1.94        ad #define	esp4_ctlinput	esp4_ctlinput_wrapper
    173   1.94        ad #endif
    174   1.94        ad 
    175   1.63      matt const struct protosw inetsw[] = {
    176   1.81  liamjfoy {	.pr_domain = &inetdomain,
    177   1.81  liamjfoy 	.pr_init = ip_init,
    178   1.81  liamjfoy 	.pr_output = ip_output,
    179  1.101    dyoung 	.pr_fasttimo = ip_fasttimo,
    180   1.81  liamjfoy 	.pr_slowtimo = ip_slowtimo,
    181  1.101    dyoung 	.pr_drain = ip_drainstub,
    182   1.81  liamjfoy },
    183   1.81  liamjfoy {	.pr_type = SOCK_DGRAM,
    184   1.81  liamjfoy 	.pr_domain = &inetdomain,
    185   1.81  liamjfoy 	.pr_protocol = IPPROTO_UDP,
    186   1.81  liamjfoy 	.pr_flags = PR_ATOMIC|PR_ADDR|PR_PURGEIF,
    187   1.81  liamjfoy 	.pr_input = udp_input,
    188   1.81  liamjfoy 	.pr_ctlinput = udp_ctlinput,
    189   1.81  liamjfoy 	.pr_ctloutput = udp_ctloutput,
    190   1.81  liamjfoy 	.pr_usrreq = udp_usrreq,
    191   1.81  liamjfoy 	.pr_init = udp_init,
    192   1.81  liamjfoy },
    193   1.81  liamjfoy {	.pr_type = SOCK_STREAM,
    194   1.81  liamjfoy 	.pr_domain = &inetdomain,
    195   1.81  liamjfoy 	.pr_protocol = IPPROTO_TCP,
    196   1.81  liamjfoy 	.pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN|PR_ABRTACPTDIS|PR_PURGEIF,
    197   1.81  liamjfoy 	.pr_input = tcp_input,
    198   1.81  liamjfoy 	.pr_ctlinput = tcp_ctlinput,
    199   1.81  liamjfoy 	.pr_ctloutput = tcp_ctloutput,
    200   1.81  liamjfoy 	.pr_usrreq = tcp_usrreq,
    201   1.81  liamjfoy 	.pr_init = tcp_init,
    202  1.101    dyoung 	.pr_fasttimo = tcp_fasttimo,
    203   1.81  liamjfoy 	.pr_slowtimo = tcp_slowtimo,
    204  1.101    dyoung 	.pr_drain = tcp_drainstub,
    205   1.81  liamjfoy },
    206   1.81  liamjfoy {	.pr_type = SOCK_RAW,
    207   1.81  liamjfoy 	.pr_domain = &inetdomain,
    208   1.81  liamjfoy 	.pr_protocol = IPPROTO_RAW,
    209   1.81  liamjfoy 	.pr_flags = PR_ATOMIC|PR_ADDR|PR_PURGEIF,
    210   1.81  liamjfoy 	.pr_input = rip_input,
    211   1.81  liamjfoy 	.pr_output = rip_output,
    212   1.81  liamjfoy 	.pr_ctlinput = rip_ctlinput,
    213   1.81  liamjfoy 	.pr_ctloutput = rip_ctloutput,
    214   1.81  liamjfoy 	.pr_usrreq = rip_usrreq,
    215   1.81  liamjfoy },
    216   1.81  liamjfoy {	.pr_type = SOCK_RAW,
    217   1.81  liamjfoy 	.pr_domain = &inetdomain,
    218   1.81  liamjfoy 	.pr_protocol = IPPROTO_ICMP,
    219   1.81  liamjfoy 	.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
    220   1.81  liamjfoy 	.pr_input = icmp_input,
    221   1.81  liamjfoy 	.pr_output = rip_output,
    222   1.81  liamjfoy 	.pr_ctlinput = rip_ctlinput,
    223   1.81  liamjfoy 	.pr_ctloutput = rip_ctloutput,
    224   1.81  liamjfoy 	.pr_usrreq = rip_usrreq,
    225   1.81  liamjfoy 	.pr_init = icmp_init,
    226    1.8   mycroft },
    227   1.83  liamjfoy #ifdef GATEWAY
    228   1.83  liamjfoy {	.pr_domain = &inetdomain,
    229   1.83  liamjfoy 	.pr_protocol = IPPROTO_IP,
    230   1.83  liamjfoy 	.pr_slowtimo = ipflow_slowtimo,
    231   1.96     pooka 	.pr_init = ipflow_poolinit,
    232   1.83  liamjfoy },
    233   1.83  liamjfoy #endif /* GATEWAY */
    234  1.106  christos #ifdef IPSEC
    235   1.81  liamjfoy {	.pr_type = SOCK_RAW,
    236   1.81  liamjfoy 	.pr_domain = &inetdomain,
    237   1.81  liamjfoy 	.pr_protocol = IPPROTO_AH,
    238   1.81  liamjfoy 	.pr_flags = PR_ATOMIC|PR_ADDR,
    239   1.81  liamjfoy 	.pr_input = ipsec4_common_input,
    240   1.81  liamjfoy 	.pr_ctlinput = ah4_ctlinput,
    241   1.81  liamjfoy },
    242   1.81  liamjfoy {	.pr_type = SOCK_RAW,
    243   1.81  liamjfoy 	.pr_domain = &inetdomain,
    244   1.81  liamjfoy 	.pr_protocol = IPPROTO_ESP,
    245   1.81  liamjfoy 	.pr_flags = PR_ATOMIC|PR_ADDR,
    246   1.81  liamjfoy 	.pr_input = ipsec4_common_input,
    247   1.81  liamjfoy 	.pr_ctlinput = esp4_ctlinput,
    248   1.81  liamjfoy },
    249   1.81  liamjfoy {	.pr_type = SOCK_RAW,
    250   1.81  liamjfoy 	.pr_domain = &inetdomain,
    251   1.81  liamjfoy 	.pr_protocol = IPPROTO_IPCOMP,
    252   1.81  liamjfoy 	.pr_flags = PR_ATOMIC|PR_ADDR,
    253   1.81  liamjfoy 	.pr_input = ipsec4_common_input,
    254   1.61  jonathan },
    255  1.106  christos #endif /* IPSEC */
    256   1.81  liamjfoy {	.pr_type = SOCK_RAW,
    257   1.81  liamjfoy 	.pr_domain = &inetdomain,
    258   1.81  liamjfoy 	.pr_protocol = IPPROTO_IPV4,
    259   1.81  liamjfoy 	.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
    260   1.81  liamjfoy 	.pr_input = encap4_input,
    261   1.81  liamjfoy 	.pr_output = rip_output,
    262   1.81  liamjfoy 	.pr_ctlinput = rip_ctlinput,
    263   1.81  liamjfoy 	.pr_ctloutput = rip_ctloutput,
    264   1.81  liamjfoy 	.pr_usrreq = rip_usrreq,
    265   1.81  liamjfoy 	.pr_init = encap_init,
    266   1.32    itojun },
    267   1.32    itojun #ifdef INET6
    268   1.81  liamjfoy {	.pr_type = SOCK_RAW,
    269   1.81  liamjfoy 	.pr_domain = &inetdomain,
    270   1.81  liamjfoy 	.pr_protocol = IPPROTO_IPV6,
    271   1.81  liamjfoy 	.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
    272   1.81  liamjfoy 	.pr_input = encap4_input,
    273   1.81  liamjfoy 	.pr_output = rip_output,
    274   1.81  liamjfoy 	.pr_ctlinput = rip_ctlinput,
    275   1.81  liamjfoy 	.pr_ctloutput = rip_ctloutput,
    276   1.81  liamjfoy 	.pr_usrreq = rip_usrreq,
    277   1.81  liamjfoy 	.pr_init = encap_init,
    278   1.32    itojun },
    279   1.32    itojun #endif /* INET6 */
    280   1.79    rpaulo #if NETHERIP > 0
    281   1.81  liamjfoy {	.pr_type = SOCK_RAW,
    282   1.81  liamjfoy 	.pr_domain = &inetdomain,
    283   1.81  liamjfoy 	.pr_protocol = IPPROTO_ETHERIP,
    284   1.81  liamjfoy 	.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
    285   1.81  liamjfoy 	.pr_input = ip_etherip_input,
    286   1.81  liamjfoy 	.pr_output = rip_output,
    287   1.81  liamjfoy 	.pr_ctlinput = rip_ctlinput,
    288   1.81  liamjfoy 	.pr_ctloutput = rip_ctloutput,
    289   1.81  liamjfoy 	.pr_usrreq = rip_usrreq,
    290   1.67       kim },
    291   1.81  liamjfoy #endif /* NETHERIP > 0 */
    292   1.72  liamjfoy #if NCARP > 0
    293   1.81  liamjfoy {	.pr_type = SOCK_RAW,
    294   1.81  liamjfoy 	.pr_domain = &inetdomain,
    295   1.81  liamjfoy 	.pr_protocol = IPPROTO_CARP,
    296   1.81  liamjfoy 	.pr_flags = PR_ATOMIC|PR_ADDR,
    297   1.81  liamjfoy 	.pr_input = carp_proto_input,
    298   1.81  liamjfoy 	.pr_output = rip_output,
    299   1.81  liamjfoy 	.pr_ctloutput = rip_ctloutput,
    300   1.81  liamjfoy 	.pr_usrreq = rip_usrreq,
    301   1.99     pooka 	.pr_init = carp_init,
    302   1.72  liamjfoy },
    303   1.81  liamjfoy #endif /* NCARP > 0 */
    304   1.98  degroote #if NPFSYNC > 0
    305   1.98  degroote {	.pr_type = SOCK_RAW,
    306   1.98  degroote 	.pr_domain = &inetdomain,
    307   1.98  degroote 	.pr_protocol = IPPROTO_PFSYNC,
    308   1.98  degroote 	.pr_flags	 = PR_ATOMIC|PR_ADDR,
    309   1.98  degroote 	.pr_input	 = pfsync_input,
    310   1.98  degroote 	.pr_output	 = rip_output,
    311   1.98  degroote 	.pr_ctloutput = rip_ctloutput,
    312   1.98  degroote 	.pr_usrreq	 = rip_usrreq,
    313   1.98  degroote },
    314   1.98  degroote #endif /* NPFSYNC > 0 */
    315   1.81  liamjfoy {	.pr_type = SOCK_RAW,
    316   1.81  liamjfoy 	.pr_domain = &inetdomain,
    317   1.81  liamjfoy 	.pr_protocol = IPPROTO_IGMP,
    318   1.81  liamjfoy 	.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
    319   1.81  liamjfoy 	.pr_input = igmp_input,
    320   1.81  liamjfoy 	.pr_output = rip_output,
    321   1.81  liamjfoy 	.pr_ctloutput = rip_ctloutput,
    322   1.81  liamjfoy 	.pr_ctlinput = rip_ctlinput,
    323   1.81  liamjfoy 	.pr_usrreq = rip_usrreq,
    324   1.81  liamjfoy 	.pr_fasttimo = igmp_fasttimo,
    325   1.81  liamjfoy 	.pr_slowtimo = igmp_slowtimo,
    326   1.92   thorpej 	.pr_init = igmp_init,
    327    1.1       cgd },
    328   1.65      manu #ifdef PIM
    329   1.81  liamjfoy {	.pr_type = SOCK_RAW,
    330   1.81  liamjfoy 	.pr_domain = &inetdomain,
    331   1.81  liamjfoy 	.pr_protocol = IPPROTO_PIM,
    332   1.81  liamjfoy 	.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
    333   1.81  liamjfoy 	.pr_input = pim_input,
    334   1.81  liamjfoy 	.pr_output = rip_output,
    335   1.81  liamjfoy 	.pr_ctloutput = rip_ctloutput,
    336   1.81  liamjfoy 	.pr_ctlinput = rip_ctlinput,
    337   1.81  liamjfoy 	.pr_usrreq = rip_usrreq,
    338   1.65      manu },
    339   1.65      manu #endif /* PIM */
    340   1.11   mycroft /* raw wildcard */
    341   1.81  liamjfoy {	.pr_type = SOCK_RAW,
    342   1.81  liamjfoy 	.pr_domain = &inetdomain,
    343   1.81  liamjfoy 	.pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR,
    344   1.81  liamjfoy 	.pr_input = rip_input,
    345   1.81  liamjfoy 	.pr_output = rip_output,
    346   1.81  liamjfoy 	.pr_ctloutput = rip_ctloutput,
    347   1.81  liamjfoy 	.pr_ctlinput = rip_ctlinput,
    348   1.81  liamjfoy 	.pr_usrreq = rip_usrreq,
    349   1.81  liamjfoy 	.pr_init = rip_init,
    350    1.1       cgd },
    351    1.1       cgd };
    352    1.1       cgd 
    353   1.73      matt extern struct ifqueue ipintrq;
    354   1.73      matt 
    355   1.89    dyoung const struct sockaddr_in in_any = {
    356   1.89    dyoung 	  .sin_len = sizeof(struct sockaddr_in)
    357   1.89    dyoung 	, .sin_family = AF_INET
    358   1.89    dyoung 	, .sin_port = 0
    359   1.90    dyoung 	, .sin_addr = {.s_addr = 0 /* INADDR_ANY */}
    360   1.89    dyoung };
    361   1.89    dyoung 
    362   1.73      matt struct domain inetdomain = {
    363   1.80    dyoung 	.dom_family = PF_INET, .dom_name = "internet", .dom_init = NULL,
    364   1.80    dyoung 	.dom_externalize = NULL, .dom_dispose = NULL,
    365   1.80    dyoung 	.dom_protosw = inetsw,
    366   1.87    dyoung 	.dom_protoswNPROTOSW = &inetsw[__arraycount(inetsw)],
    367  1.100    dyoung 	.dom_rtattach = rt_inithead,
    368   1.95     pooka 	.dom_rtoffset = 32,
    369   1.95     pooka 	.dom_maxrtkey = sizeof(struct ip_pack4),
    370   1.78    dyoung #ifdef IPSELSRC
    371   1.80    dyoung 	.dom_ifattach = in_domifattach,
    372   1.80    dyoung 	.dom_ifdetach = in_domifdetach,
    373   1.78    dyoung #else
    374   1.80    dyoung 	.dom_ifattach = NULL,
    375   1.80    dyoung 	.dom_ifdetach = NULL,
    376   1.78    dyoung #endif
    377   1.80    dyoung 	.dom_ifqueues = { &ipintrq, NULL },
    378   1.80    dyoung 	.dom_link = { NULL },
    379   1.80    dyoung 	.dom_mowner = MOWNER_INIT("",""),
    380   1.86    dyoung 	.dom_sa_cmpofs = offsetof(struct sockaddr_in, sin_addr),
    381   1.86    dyoung 	.dom_sa_cmplen = sizeof(struct in_addr),
    382   1.89    dyoung 	.dom_sa_any = (const struct sockaddr *)&in_any,
    383   1.89    dyoung 	.dom_sockaddr_const_addr = sockaddr_in_const_addr,
    384   1.89    dyoung 	.dom_sockaddr_addr = sockaddr_in_addr,
    385   1.84    dyoung 	.dom_rtcache = LIST_HEAD_INITIALIZER(inetdomain.dom_rtcache)
    386   1.73      matt };
    387   1.38   darrenr 
    388   1.38   darrenr u_char	ip_protox[IPPROTO_MAX];
    389   1.36   thorpej 
    390   1.40    itojun int icmperrppslim = 100;			/* 100pps */
    391   1.84    dyoung 
    392   1.89    dyoung static void
    393   1.89    dyoung sockaddr_in_addrlen(const struct sockaddr *sa, socklen_t *slenp)
    394   1.89    dyoung {
    395   1.89    dyoung 	socklen_t slen;
    396   1.89    dyoung 
    397   1.89    dyoung 	if (slenp == NULL)
    398   1.89    dyoung 		return;
    399   1.89    dyoung 
    400   1.89    dyoung 	slen = sockaddr_getlen(sa);
    401   1.89    dyoung 	*slenp = (socklen_t)MIN(sizeof(struct in_addr),
    402   1.89    dyoung 	    slen - MIN(slen, offsetof(struct sockaddr_in, sin_addr)));
    403   1.89    dyoung }
    404   1.89    dyoung 
    405   1.89    dyoung const void *
    406   1.89    dyoung sockaddr_in_const_addr(const struct sockaddr *sa, socklen_t *slenp)
    407   1.89    dyoung {
    408   1.89    dyoung 	const struct sockaddr_in *sin;
    409   1.89    dyoung 
    410   1.89    dyoung 	sockaddr_in_addrlen(sa, slenp);
    411   1.89    dyoung 	sin = (const struct sockaddr_in *)sa;
    412   1.89    dyoung 	return &sin->sin_addr;
    413   1.89    dyoung }
    414   1.89    dyoung 
    415   1.89    dyoung void *
    416   1.89    dyoung sockaddr_in_addr(struct sockaddr *sa, socklen_t *slenp)
    417   1.89    dyoung {
    418   1.89    dyoung 	struct sockaddr_in *sin;
    419   1.89    dyoung 
    420   1.89    dyoung 	sockaddr_in_addrlen(sa, slenp);
    421   1.89    dyoung 	sin = (struct sockaddr_in *)sa;
    422   1.89    dyoung 	return &sin->sin_addr;
    423   1.89    dyoung }
    424   1.89    dyoung 
    425   1.84    dyoung int
    426   1.84    dyoung sockaddr_in_cmp(const struct sockaddr *sa1, const struct sockaddr *sa2)
    427   1.84    dyoung {
    428   1.84    dyoung 	uint_fast8_t len;
    429   1.84    dyoung 	const uint_fast8_t addrofs = offsetof(struct sockaddr_in, sin_addr),
    430   1.84    dyoung 			   addrend = addrofs + sizeof(struct in_addr);
    431   1.84    dyoung 	int rc;
    432   1.84    dyoung 	const struct sockaddr_in *sin1, *sin2;
    433   1.84    dyoung 
    434   1.84    dyoung 	sin1 = satocsin(sa1);
    435   1.84    dyoung 	sin2 = satocsin(sa2);
    436   1.84    dyoung 
    437   1.84    dyoung 	len = MIN(addrend, MIN(sin1->sin_len, sin2->sin_len));
    438   1.84    dyoung 
    439   1.84    dyoung 	if (len > addrofs &&
    440   1.84    dyoung 	     (rc = memcmp(&sin1->sin_addr, &sin2->sin_addr,
    441   1.84    dyoung 	                  len - addrofs)) != 0)
    442   1.84    dyoung 		return rc;
    443   1.84    dyoung 
    444   1.84    dyoung 	return sin1->sin_len - sin2->sin_len;
    445   1.84    dyoung }
    446