www.pudn.com > ipparse.rar > in.h


 /* 
  2  * Copyright (c) 1982, 1986, 1990, 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.h        8.3 (Berkeley) 1/3/94 
 30  * $FreeBSD: src/sys/netinet/in.h,v 1.88 2004/10/19 20:59:01 andre Exp $ 
 31  */ 
  
  #ifndef _NETINET_IN_H_ 
  #define _NETINET_IN_H_ 
   
  #include  
  #include <_types.h> 
  #include  
   
  /* Protocols common to RFC 1700, POSIX, and X/Open. */ 
  #define IPPROTO_IP              0               /* dummy for IP */ 
  #define IPPROTO_ICMP            1               /* control message protocol */ 
  #define IPPROTO_TCP             6               /* tcp */ 
 #define IPPROTO_UDP             17              /* user datagram protocol */ 
   
  #define INADDR_ANY              (u_int32_t)0x00000000 
  #define INADDR_BROADCAST        (u_int32_t)0xffffffff   /* must be masked */ 
   
  #ifndef _UINT8_T_DECLARED 
  typedef __uint8_t               uint8_t; 
  #define _UINT8_T_DECLARED 
  #endif 
   
  #ifndef _UINT16_T_DECLARED 
  typedef __uint16_t              uint16_t; 
  #define _UINT16_T_DECLARED 
  #endif 
   
  #ifndef _UINT32_T_DECLARED 
  typedef __uint32_t              uint32_t; 
  #define _UINT32_T_DECLARED 
  #endif 
   
  #ifndef _IN_ADDR_T_DECLARED 
  typedef uint32_t                in_addr_t; 
  #define _IN_ADDR_T_DECLARED 
  #endif 
   
  #ifndef _IN_PORT_T_DECLARED 
  typedef uint16_t                in_port_t; 
  #define _IN_PORT_T_DECLARED 
  #endif 
   
  #ifndef _SA_FAMILY_T_DECLARED 
  typedef __sa_family_t           sa_family_t; 
  #define _SA_FAMILY_T_DECLARED 
  #endif 
   
  /* Internet address (a structure for historical reasons). */ 
  #ifndef _STRUCT_IN_ADDR_DECLARED 
  struct in_addr { 
          in_addr_t s_addr; 
  }; 
  #define _STRUCT_IN_ADDR_DECLARED 
  #endif 
   
  /* Socket address, internet style. */ 
  struct sockaddr_in { 
          uint8_t sin_len; 
          sa_family_t     sin_family; 
         in_port_t       sin_port; 
         struct  in_addr sin_addr; 
          char    sin_zero[8]; 
  }; 
   
  #ifndef _KERNEL 
   
  #ifndef _BYTEORDER_PROTOTYPED 
  #define _BYTEORDER_PROTOTYPED 
__BEGIN_DECLS 
 uint32_t        htonl(uint32_t); 
 uint16_t        htons(uint16_t); 
 uint32_t        ntohl(uint32_t); 
 uint16_t        ntohs(uint16_t); 
 __END_DECLS 
 #endif 
 
 #ifndef _BYTEORDER_FUNC_DEFINED 
 #define _BYTEORDER_FUNC_DEFINED 
 #define htonl(x)        __htonl(x) 
 #define htons(x)        __htons(x) 
 #define ntohl(x)        __ntohl(x) 
 #define ntohs(x)        __ntohs(x) 
 #endif 
  
 #endif /* !_KERNEL */ 
  
 #if __POSIX_VISIBLE >= 200112 
 #define IPPROTO_RAW             255             /* raw IP packet */ 
 #define INET_ADDRSTRLEN         16 
 #endif 
  
 #if __BSD_VISIBLE 
 /* 
  * Constants and structures defined by the internet system, 
126  * Per RFC 790, September 1981, and numerous additions. 
127  */ 
  
 /* 
130  * Protocols (RFC 1700) 
131  */ 
 #define IPPROTO_HOPOPTS         0               /* IP6 hop-by-hop options */ 
 #define IPPROTO_IGMP            2               /* group mgmt protocol */ 
 #define IPPROTO_GGP             3               /* gateway^2 (deprecated) */ 
 #define IPPROTO_IPV4            4               /* IPv4 encapsulation */ 
#define IPPROTO_IPIP            IPPROTO_IPV4    /* for compatibility */ 
 #define IPPROTO_ST              7               /* Stream protocol II */ 
 #define IPPROTO_EGP             8               /* exterior gateway protocol */ 
 #define IPPROTO_PIGP            9               /* private interior gateway */ 
 #define IPPROTO_RCCMON          10              /* BBN RCC Monitoring */ 
 #define IPPROTO_NVPII           11              /* network voice protocol*/ 
 #define IPPROTO_PUP             12              /* pup */ 
 #define IPPROTO_ARGUS           13              /* Argus */ 
 #define IPPROTO_EMCON           14              /* EMCON */ 
 #define IPPROTO_XNET            15              /* Cross Net Debugger */ 
 #define IPPROTO_CHAOS           16              /* Chaos*/ 
 #define IPPROTO_MUX             18              /* Multiplexing */ 
 #define IPPROTO_MEAS            19              /* DCN Measurement Subsystems */ 
 #define IPPROTO_HMP             20              /* Host Monitoring */ 
 #define IPPROTO_PRM             21              /* Packet Radio Measurement */ 
 #define IPPROTO_IDP             22              /* xns idp */ 
 #define IPPROTO_TRUNK1          23              /* Trunk-1 */ 
 #define IPPROTO_TRUNK2          24              /* Trunk-2 */ 
 #define IPPROTO_LEAF1           25              /* Leaf-1 */ 
 #define IPPROTO_LEAF2           26              /* Leaf-2 */ 
 #define IPPROTO_RDP             27              /* Reliable Data */ 
 #define IPPROTO_IRTP            28              /* Reliable Transaction */ 
 #define IPPROTO_TP              29              /* tp-4 w/ class negotiation */ 
 #define IPPROTO_BLT             30              /* Bulk Data Transfer */ 
 #define IPPROTO_NSP             31              /* Network Services */ 
 #define IPPROTO_INP             32              /* Merit Internodal */ 
 #define IPPROTO_SEP             33              /* Sequential Exchange */ 
 #define IPPROTO_3PC             34              /* Third Party Connect */ 
 #define IPPROTO_IDPR            35              /* InterDomain Policy Routing */ 
 #define IPPROTO_XTP             36              /* XTP */ 
 #define IPPROTO_DDP             37              /* Datagram Delivery */ 
 #define IPPROTO_CMTP            38              /* Control Message Transport */ 
 #define IPPROTO_TPXX            39              /* TP++ Transport */ 
 #define IPPROTO_IL              40              /* IL transport protocol */ 
 #define IPPROTO_IPV6            41              /* IP6 header */ 
 #define IPPROTO_SDRP            42              /* Source Demand Routing */ 
 #define IPPROTO_ROUTING         43              /* IP6 routing header */ 
 #define IPPROTO_FRAGMENT        44              /* IP6 fragmentation header */ 
#define IPPROTO_IDRP            45              /* InterDomain Routing*/ 
 #define IPPROTO_RSVP            46              /* resource reservation */ 
 #define IPPROTO_GRE             47              /* General Routing Encap. */ 
 #define IPPROTO_MHRP            48              /* Mobile Host Routing */ 
 #define IPPROTO_BHA             49              /* BHA */ 
 #define IPPROTO_ESP             50              /* IP6 Encap Sec. Payload */ 
 #define IPPROTO_AH              51              /* IP6 Auth Header */ 
 #define IPPROTO_INLSP           52              /* Integ. Net Layer Security */ 
 #define IPPROTO_SWIPE           53              /* IP with encryption */ 
 #define IPPROTO_NHRP            54              /* Next Hop Resolution */ 
 #define IPPROTO_MOBILE          55              /* IP Mobility */ 
#define IPPROTO_TLSP            56              /* Transport Layer Security */ 
 #define IPPROTO_SKIP            57              /* SKIP */ 
 #define IPPROTO_ICMPV6          58              /* ICMP6 */ 
 #define IPPROTO_NONE            59              /* IP6 no next header */ 
 #define IPPROTO_DSTOPTS         60              /* IP6 destination option */ 
 #define IPPROTO_AHIP            61              /* any host internal protocol */ 
 #define IPPROTO_CFTP            62              /* CFTP */ 
 #define IPPROTO_HELLO           63              /* "hello" routing protocol */ 
 #define IPPROTO_SATEXPAK        64              /* SATNET/Backroom EXPAK */ 
 #define IPPROTO_KRYPTOLAN       65              /* Kryptolan */ 
#define IPPROTO_RVD             66              /* Remote Virtual Disk */ 
 #define IPPROTO_IPPC            67              /* Pluribus Packet Core */ 
 #define IPPROTO_ADFS            68              /* Any distributed FS */ 
 #define IPPROTO_SATMON          69              /* Satnet Monitoring */ 
 #define IPPROTO_VISA            70              /* VISA Protocol */ 
 #define IPPROTO_IPCV            71              /* Packet Core Utility */ 
 #define IPPROTO_CPNX            72              /* Comp. Prot. Net. Executive */ 
 #define IPPROTO_CPHB            73              /* Comp. Prot. HeartBeat */ 
 #define IPPROTO_WSN             74              /* Wang Span Network */ 
 #define IPPROTO_PVP             75              /* Packet Video Protocol */ 
 #define IPPROTO_BRSATMON        76              /* BackRoom SATNET Monitoring */ 
 #define IPPROTO_ND              77              /* Sun net disk proto (temp.) */ 
 #define IPPROTO_WBMON           78              /* WIDEBAND Monitoring */ 
 #define IPPROTO_WBEXPAK         79              /* WIDEBAND EXPAK */ 
 #define IPPROTO_EON             80              /* ISO cnlp */ 
 #define IPPROTO_VMTP            81              /* VMTP */ 
 #define IPPROTO_SVMTP           82              /* Secure VMTP */ 
 #define IPPROTO_VINES           83              /* Banyon VINES */ 
 #define IPPROTO_TTP             84              /* TTP */ 
 #define IPPROTO_IGP             85              /* NSFNET-IGP */ 
 #define IPPROTO_DGP             86              /* dissimilar gateway prot. */ 
 #define IPPROTO_TCF             87              /* TCF */ 
 #define IPPROTO_IGRP            88              /* Cisco/GXS IGRP */ 
 #define IPPROTO_OSPFIGP         89              /* OSPFIGP */ 
 #define IPPROTO_SRPC            90              /* Strite RPC protocol */ 
 #define IPPROTO_LARP            91              /* Locus Address Resoloution */ 
 #define IPPROTO_MTP             92              /* Multicast Transport */ 
 #define IPPROTO_AX25            93              /* AX.25 Frames */ 
 #define IPPROTO_IPEIP           94              /* IP encapsulated in IP */ 
 #define IPPROTO_MICP            95              /* Mobile Int.ing control */ 
 #define IPPROTO_SCCSP           96              /* Semaphore Comm. security */ 
 #define IPPROTO_ETHERIP         97              /* Ethernet IP encapsulation */ 
 #define IPPROTO_ENCAP           98              /* encapsulation header */ 
 #define IPPROTO_APES            99              /* any private encr. scheme */ 
 #define IPPROTO_GMTP            100             /* GMTP*/ 
 #define IPPROTO_IPCOMP          108             /* payload compression (IPComp) */ 
 /* 101-254: Partly Unassigned */ 
 #define IPPROTO_PIM             103             /* Protocol Independent Mcast */ 
 #define IPPROTO_PGM             113             /* PGM */ 
 #define IPPROTO_PFSYNC          240             /* PFSYNC */ 
 /* 255: Reserved */ 
 /* BSD Private, local use, namespace incursion, no longer used */ 
 #define IPPROTO_OLD_DIVERT      254             /* OLD divert pseudo-proto */ 
 #define IPPROTO_MAX             256 
 
 /* last return value of *_input(), meaning "all job for this pkt is done".  */ 
 #define IPPROTO_DONE            257 
  
 /* Only used internally, so can be outside the range of valid IP protocols. */ 
#define IPPROTO_DIVERT          258             /* divert pseudo-protocol */ 
  
 /* 
  * Defined to avoid confusion.  The master value is defined by 
248  * PROTO_SPACER in sys/protosw.h. 
249  */ 
250 #define IPPROTO_SPACER          32767           /* spacer for loadable protos */ 
251  
252 /* 
253  * Local port number conventions: 
254  * 
255  * When a user does a bind(2) or connect(2) with a port number of zero, 
256  * a non-conflicting local port address is chosen. 
257  * The default range is IPPORT_HIFIRSTAUTO through 
258  * IPPORT_HILASTAUTO, although that is settable by sysctl. 
259  * 
260  * A user may set the IPPROTO_IP option IP_PORTRANGE to change this 
261  * default assignment range. 
262  * 
263  * The value IP_PORTRANGE_DEFAULT causes the default behavior. 
264  * 
265  * The value IP_PORTRANGE_HIGH changes the range of candidate port numbers 
266  * into the "high" range.  These are reserved for client outbound connections 
267  * which do not want to be filtered by any firewalls.  Note that by default 
268  * this is the same as IP_PORTRANGE_DEFAULT. 
269  * 
270  * The value IP_PORTRANGE_LOW changes the range to the "low" are 
271  * that is (by convention) restricted to privileged processes.  This 
272  * convention is based on "vouchsafe" principles only.  It is only secure 
273  * if you trust the remote host to restrict these ports. 
274  * 
275  * The default range of ports and the high range can be changed by 
276  * sysctl(3).  (net.inet.ip.port{hi,low}{first,last}_auto) 
277  * 
278  * Changing those values has bad security implications if you are 
279  * using a stateless firewall that is allowing packets outside of that 
280  * range in order to allow transparent outgoing connections. 
281  * 
282  * Such a firewall configuration will generally depend on the use of these 
283  * default values.  If you change them, you may find your Security 
284  * Administrator looking for you with a heavy object. 
285  * 
286  * For a slightly more orthodox text view on this: 
287  * 
288  *            ftp://ftp.isi.edu/in-notes/iana/assignments/port-numbers 
289  * 
290  *    port numbers are divided into three ranges: 
291  * 
292  *                0 -  1023 Well Known Ports 
293  *             1024 - 49151 Registered Ports 
294  *            49152 - 65535 Dynamic and/or Private Ports 
295  * 
296  */ 
  
 /* 
299  * Ports < IPPORT_RESERVED are reserved for 
300  * privileged processes (e.g. root).         (IP_PORTRANGE_LOW) 
301  */ 
 #define IPPORT_RESERVED         1024 
  
 /* 
305  * Default local port range, used by both IP_PORTRANGE_DEFAULT 
306  * and IP_PORTRANGE_HIGH. 
307  */ 
 #define IPPORT_HIFIRSTAUTO      49152 
 #define IPPORT_HILASTAUTO       65535 
  
 /* 
312  * Scanning for a free reserved port return a value below IPPORT_RESERVED, 
313  * but higher than IPPORT_RESERVEDSTART.  Traditionally the start value was 
314  * 512, but that conflicts with some well-known-services that firewalls may 
315  * have a fit if we use. 
316  */ 
 #define IPPORT_RESERVEDSTART    600 
  
#define IPPORT_MAX              65535 
  
 /* 
322  * Definitions of bits in internet address integers. 
323  * On subnets, the decomposition of addresses to host and net parts 
324  * is done according to subnet mask, not the masks here. 
325  */ 
 #define IN_CLASSA(i)            (((u_int32_t)(i) & 0x80000000) == 0) 
 #define IN_CLASSA_NET           0xff000000 
 #define IN_CLASSA_NSHIFT        24 
 #define IN_CLASSA_HOST          0x00ffffff 
 #define IN_CLASSA_MAX           128 
  
 #define IN_CLASSB(i)            (((u_int32_t)(i) & 0xc0000000) == 0x80000000) 
 #define IN_CLASSB_NET           0xffff0000 
 #define IN_CLASSB_NSHIFT        16 
 #define IN_CLASSB_HOST          0x0000ffff 
 #define IN_CLASSB_MAX           65536 
  
 #define IN_CLASSC(i)            (((u_int32_t)(i) & 0xe0000000) == 0xc0000000) 
 #define IN_CLASSC_NET           0xffffff00 
 #define IN_CLASSC_NSHIFT        8 
 #define IN_CLASSC_HOST          0x000000ff 
  
 #define IN_CLASSD(i)            (((u_int32_t)(i) & 0xf0000000) == 0xe0000000) 
 #define IN_CLASSD_NET           0xf0000000      /* These ones aren't really */ 
 #define IN_CLASSD_NSHIFT        28              /* net and host fields, but */ 
 #define IN_CLASSD_HOST          0x0fffffff      /* routing needn't know.    */ 
 #define IN_MULTICAST(i)         IN_CLASSD(i) 
  
 #define IN_EXPERIMENTAL(i)      (((u_int32_t)(i) & 0xf0000000) == 0xf0000000) 
 #define IN_BADCLASS(i)          (((u_int32_t)(i) & 0xf0000000) == 0xf0000000) 
  
 #define INADDR_LOOPBACK         (u_int32_t)0x7f000001 
 #ifndef _KERNEL 
 #define INADDR_NONE             0xffffffff              /* -1 return */ 
 #endif 
  
 #define INADDR_UNSPEC_GROUP     (u_int32_t)0xe0000000   /* 224.0.0.0 */ 
 #define INADDR_ALLHOSTS_GROUP   (u_int32_t)0xe0000001   /* 224.0.0.1 */ 
#define INADDR_ALLRTRS_GROUP    (u_int32_t)0xe0000002   /* 224.0.0.2 */ 
 #define INADDR_PFSYNC_GROUP     (u_int32_t)0xe00000f0   /* 224.0.0.240 */ 
 #define INADDR_ALLMDNS_GROUP    (u_int32_t)0xe00000fb   /* 224.0.0.251 */ 
 #define INADDR_MAX_LOCAL_GROUP  (u_int32_t)0xe00000ff   /* 224.0.0.255 */ 
  
 #define IN_LOOPBACKNET          127                     /* official! */ 
  
 /* 
67  * Options for use with [gs]etsockopt at the IP level. 
368  * First word of comment is data type; bool is stored in int. 
369  */ 
 #define IP_OPTIONS              1    /* buf/ip_opts; set/get IP options */ 
 #define IP_HDRINCL              2    /* int; header is included with data */ 
 #define IP_TOS                  3    /* int; IP type of service and preced. */ 
 #define IP_TTL                  4    /* int; IP time to live */ 
 #define IP_RECVOPTS             5    /* bool; receive all IP opts w/dgram */ 
 #define IP_RECVRETOPTS          6    /* bool; receive IP opts for response */ 
 #define IP_RECVDSTADDR          7    /* bool; receive IP dst addr w/dgram */ 
#define IP_SENDSRCADDR          IP_RECVDSTADDR /* cmsg_type to set src addr */ 
 #define IP_RETOPTS              8    /* ip_opts; set/get IP options */ 
 #define IP_MULTICAST_IF         9    /* u_char; set/get IP multicast i/f  */ 
 #define IP_MULTICAST_TTL        10   /* u_char; set/get IP multicast ttl */ 
 #define IP_MULTICAST_LOOP       11   /* u_char; set/get IP multicast loopback */ 
 #define IP_ADD_MEMBERSHIP       12   /* ip_mreq; add an IP group membership */ 
#define IP_DROP_MEMBERSHIP      13   /* ip_mreq; drop an IP group membership */ 
 #define IP_MULTICAST_VIF        14   /* set/get IP mcast virt. iface */ 
 #define IP_RSVP_ON              15   /* enable RSVP in kernel */ 
#define IP_RSVP_OFF             16   /* disable RSVP in kernel */ 
 #define IP_RSVP_VIF_ON          17   /* set RSVP per-vif socket */ 
 #define IP_RSVP_VIF_OFF         18   /* unset RSVP per-vif socket */ 
 #define IP_PORTRANGE            19   /* int; range to choose for unspec port */ 
 #define IP_RECVIF               20   /* bool; receive reception if w/dgram */ 
 /* for IPSEC */ 
 #define IP_IPSEC_POLICY         21   /* int; set/get security policy */ 
 #define IP_FAITH                22   /* bool; accept FAITH'ed connections */ 
  
 #define IP_ONESBCAST            23   /* bool: send all-ones broadcast */ 
  
 #define IP_FW_TABLE_ADD         40   /* add entry */ 
 #define IP_FW_TABLE_DEL         41   /* delete entry */ 
 #define IP_FW_TABLE_FLUSH       42   /* flush table */ 
 #define IP_FW_TABLE_GETSIZE     43   /* get table size */ 
 #define IP_FW_TABLE_LIST        44   /* list table contents */ 
  
 #define IP_FW_ADD               50   /* add a firewall rule to chain */ 
 #define IP_FW_DEL               51   /* delete a firewall rule from chain */ 
 #define IP_FW_FLUSH             52   /* flush firewall rule chain */ 
 #define IP_FW_ZERO              53   /* clear single/all firewall counter(s) */ 
 #define IP_FW_GET               54   /* get entire firewall rule chain */ 
 #define IP_FW_RESETLOG          55   /* reset logging counters */ 
  
#define IP_DUMMYNET_CONFIGURE   60   /* add/configure a dummynet pipe */ 
 #define IP_DUMMYNET_DEL         61   /* delete a dummynet pipe from chain */ 
 #define IP_DUMMYNET_FLUSH       62   /* flush dummynet */ 
 #define IP_DUMMYNET_GET         64   /* get entire dummynet pipes */ 
  
 #define IP_RECVTTL              65   /* bool; receive IP TTL w/dgram */ 
  
 /* 
8  * Defaults and limits for options 
419  */ 
 #define IP_DEFAULT_MULTICAST_TTL  1     /* normally limit m'casts to 1 hop  */ 
 #define IP_DEFAULT_MULTICAST_LOOP 1     /* normally hear sends if a member  */ 
 #define IP_MAX_MEMBERSHIPS      20      /* per socket */ 
  
 /* 
  * Argument structure for IP_ADD_MEMBERSHIP and IP_DROP_MEMBERSHIP. 
426  */ 
struct ip_mreq { 
         struct  in_addr imr_multiaddr;  /* IP multicast address of group */ 
         struct  in_addr imr_interface;  /* local IP address of interface */ 
 }; 
  
 /* 
  * Argument for IP_PORTRANGE: 
4  * - which range to search when port is unspecified at bind() or connect() 
435  */ 
 #define IP_PORTRANGE_DEFAULT    0       /* default range */ 
 #define IP_PORTRANGE_HIGH       1       /* "high" - request firewall bypass */ 
 #define IP_PORTRANGE_LOW        2       /* "low" - vouchsafe security */ 
 
 /* 
41  * Definitions for inet sysctl operations. 
442  * 
443  * Third level is protocol number. 
444  * Fourth level is desired variable within that protocol. 
445  */ 
 #define IPPROTO_MAXID   (IPPROTO_AH + 1)        /* don't list to IPPROTO_MAX */ 
 #define CTL_IPPROTO_NAMES { \ 
        { "ip", CTLTYPE_NODE }, \ 
         { "icmp", CTLTYPE_NODE }, \ 
        { "igmp", CTLTYPE_NODE }, \ 
         { "ggp", CTLTYPE_NODE }, \ 
         { 0, 0 }, \ 
         { 0, 0 }, \ 
         { "tcp", CTLTYPE_NODE }, \ 
         { 0, 0 }, \ 
         { "egp", CTLTYPE_NODE }, \ 
         { 0, 0 }, \ 
        { 0, 0 }, \ 
         { 0, 0 }, \ 
         { "pup", CTLTYPE_NODE }, \ 
         { 0, 0 }, \ 
         { 0, 0 }, \ 
         { 0, 0 }, \ 
         { 0, 0 }, \ 
         { "udp", CTLTYPE_NODE }, \ 
         { 0, 0 }, \ 
         { 0, 0 }, \ 
         { 0, 0 }, \ 
         { 0, 0 }, \ 
         { "idp", CTLTYPE_NODE }, \ 
         { 0, 0 }, \ 
         { 0, 0 }, \ 
         { 0, 0 }, \ 
         { 0, 0 }, \ 
         { 0, 0 }, \ 
         { 0, 0 }, \ 
        { 0, 0 }, \ 
         { 0, 0 }, \ 
         { 0, 0 }, \ 
         { 0, 0 }, \ 
       { 0, 0 }, \ 
         { 0, 0 }, \ 
        { 0, 0 }, \ 
         { 0, 0 }, \ 
         { 0, 0 }, \ 
         { 0, 0 }, \ 
         { 0, 0 }, \ 
         { 0, 0 }, \ 
         { 0, 0 }, \ 
         { 0, 0 }, \ 
         { 0, 0 }, \ 
         { 0, 0 }, \ 
         { 0, 0 }, \ 
         { 0, 0 }, \ 
         { 0, 0 }, \ 
        { 0, 0 }, \ 
        { 0, 0 }, \ 
         { 0, 0 }, \ 
         { "ipsec", CTLTYPE_NODE }, \ 
         { 0, 0 }, \ 
         { 0, 0 }, \ 
         { 0, 0 }, \ 
         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \ 
         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \ 
         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \ 
         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \ 
         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \ 
        { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \ 
         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \ 
         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \ 
         { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, \ 
         { 0, 0 }, \ 
         { 0, 0 }, \ 
         { 0, 0 }, \ 
         { "pim", CTLTYPE_NODE }, \ 
 } 
  
 /* 
520  * Names for IP sysctl objects 
521  */ 
 #define IPCTL_FORWARDING        1       /* act as router */ 
 #define IPCTL_SENDREDIRECTS     2       /* may send redirects when forwarding */ 
 #define IPCTL_DEFTTL            3       /* default TTL */ 
 #ifdef notyet 
 #define IPCTL_DEFMTU            4       /* default MTU */ 
 #endif 
 #define IPCTL_RTEXPIRE          5       /* cloned route expiration time */ 
#define IPCTL_RTMINEXPIRE       6       /* min value for expiration time */ 
 #define IPCTL_RTMAXCACHE        7       /* trigger level for dynamic expire */ 
 #define IPCTL_SOURCEROUTE       8       /* may perform source routes */ 
 #define IPCTL_DIRECTEDBROADCAST 9       /* may re-broadcast received packets */ 
 #define IPCTL_INTRQMAXLEN       10      /* max length of netisr queue */ 
 #define IPCTL_INTRQDROPS        11      /* number of netisr q drops */ 
#define IPCTL_STATS             12      /* ipstat structure */ 
 #define IPCTL_ACCEPTSOURCEROUTE 13      /* may accept source routed packets */ 
 #define IPCTL_FASTFORWARDING    14      /* use fast IP forwarding code */ 
 #define IPCTL_KEEPFAITH         15      /* FAITH IPv4->IPv6 translater ctl */ 
 #define IPCTL_GIF_TTL           16      /* default TTL for gif encap packet */ 
#define IPCTL_MAXID             17 
 
#define IPCTL_NAMES { \ 
        { 0, 0 }, \ 
        { "forwarding", CTLTYPE_INT }, \ 
         { "redirect", CTLTYPE_INT }, \ 
         { "ttl", CTLTYPE_INT }, \ 
        { "mtu", CTLTYPE_INT }, \ 
        { "rtexpire", CTLTYPE_INT }, \ 
        { "rtminexpire", CTLTYPE_INT }, \ 
        { "rtmaxcache", CTLTYPE_INT }, \ 
       { "sourceroute", CTLTYPE_INT }, \ 
         { "directed-broadcast", CTLTYPE_INT }, \ 
         { "intr-queue-maxlen", CTLTYPE_INT }, \ 
         { "intr-queue-drops", CTLTYPE_INT }, \ 
        { "stats", CTLTYPE_STRUCT }, \ 
         { "accept_sourceroute", CTLTYPE_INT }, \ 
    { "fastforwarding", CTLTYPE_INT }, \ 
 } 
  
#endif /* __BSD_VISIBLE */ 
  
 #ifdef _KERNEL 
  
 struct ifnet; struct mbuf;      /* forward declarations for Standard C */ 
  
 int      in_broadcast(struct in_addr, struct ifnet *); 
int      in_canforward(struct in_addr); 
 int      in_localaddr(struct in_addr); 
 int      in_localip(struct in_addr); 
 char    *inet_ntoa(struct in_addr); /* in libkern */ 
 char    *inet_ntoa_r(struct in_addr ina, char *buf); /* in libkern */ 
  
 #define in_hosteq(s, t) ((s).s_addr == (t).s_addr) 
 #define in_nullhost(x)  ((x).s_addr == INADDR_ANY) 
  
 #define satosin(sa)     ((struct sockaddr_in *)(sa)) 
 #define sintosa(sin)    ((struct sockaddr *)(sin)) 
 #define ifatoia(ifa)    ((struct in_ifaddr *)(ifa)) 
  
 #endif /* _KERNEL */ 
 
 /* INET6 stuff */ 
#if __POSIX_VISIBLE >= 200112 
 #define __KAME_NETINET_IN_H_INCLUDED_ 
 #include  
 #undef __KAME_NETINET_IN_H_INCLUDED_ 
 #endif 
  
#endif /* !_NETINET_IN_H_*/