LCOM1920-T02G10

/*        $NetBSD: in.h,v 1.97 2015/05/02 14:41:32 roy Exp $        */

/*

 * Copyright (c) 1982, 1986, 1990, 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.h        8.3 (Berkeley) 1/3/94

 */

/*

 * Constants and structures defined by the internet system,

 * Per RFC 790, September 1981, and numerous additions.

 */

#ifndef _NETINET_IN_H_

#define        _NETINET_IN_H_

#include <sys/featuretest.h>

#include <machine/int_types.h>

#ifndef uint8_t

typedef __uint8_t        uint8_t;

#define        uint8_t                __uint8_t

#endif

#ifndef uint32_t

typedef __uint32_t        uint32_t;

#define        uint32_t        __uint32_t

#endif

#include <sys/ansi.h>

#ifndef in_addr_t

typedef __in_addr_t        in_addr_t;

#define        in_addr_t        __in_addr_t

#endif

#ifndef in_port_t

typedef __in_port_t        in_port_t;

#define        in_port_t        __in_port_t

#endif

#ifndef sa_family_t

typedef __sa_family_t        sa_family_t;

#define        sa_family_t        __sa_family_t

#endif

/*

 * Protocols

 */

#define        IPPROTO_IP                0                /* dummy for IP */

#define        IPPROTO_HOPOPTS                0                /* IP6 hop-by-hop options */

#define        IPPROTO_ICMP                1                /* control message protocol */

#define        IPPROTO_IGMP                2                /* group mgmt protocol */

#define        IPPROTO_GGP                3                /* gateway^2 (deprecated) */

#define        IPPROTO_IPV4                4                 /* IP header */

#define        IPPROTO_IPIP                4                /* IP inside IP */

#define        IPPROTO_TCP                6                /* tcp */

#define        IPPROTO_EGP                8                /* exterior gateway protocol */

#define        IPPROTO_PUP                12                /* pup */

#define        IPPROTO_UDP                17                /* user datagram protocol */

#define        IPPROTO_IDP                22                /* xns idp */

#define        IPPROTO_TP                29                 /* tp-4 w/ class negotiation */

#define        IPPROTO_DCCP                33                /* DCCP */

#define        IPPROTO_IPV6                41                /* IP6 header */

#define        IPPROTO_ROUTING                43                /* IP6 routing header */

#define        IPPROTO_FRAGMENT        44                /* IP6 fragmentation header */

#define        IPPROTO_RSVP                46                /* resource reservation */

#define        IPPROTO_GRE                47                /* GRE encaps RFC 1701 */

#define        IPPROTO_ESP                50                 /* encap. security payload */

#define        IPPROTO_AH                51                 /* authentication header */

#define        IPPROTO_MOBILE                55                /* IP Mobility RFC 2004 */

#define        IPPROTO_IPV6_ICMP        58                /* IPv6 ICMP */

#define        IPPROTO_ICMPV6                58                /* ICMP6 */

#define        IPPROTO_NONE                59                /* IP6 no next header */

#define        IPPROTO_DSTOPTS                60                /* IP6 destination option */

#define        IPPROTO_EON                80                /* ISO cnlp */

#define        IPPROTO_ETHERIP                97                /* Ethernet-in-IP */

#define        IPPROTO_ENCAP                98                /* encapsulation header */

#define        IPPROTO_PIM                103                /* Protocol indep. multicast */

#define        IPPROTO_IPCOMP                108                /* IP Payload Comp. Protocol */

#define        IPPROTO_VRRP                112                /* VRRP RFC 2338 */

#define        IPPROTO_CARP                112                /* Common Address Resolution Protocol */

#define IPPROTO_PFSYNC      240     /* PFSYNC */

#define        IPPROTO_RAW                255                /* raw IP packet */

#define        IPPROTO_MAX                256

/* last return value of *_input(), meaning "all job for this pkt is done".  */

#define        IPPROTO_DONE                257

/* sysctl placeholder for (FAST_)IPSEC */

#define CTL_IPPROTO_IPSEC        258

/*

 * Local port number conventions:

 *

 * Ports < IPPORT_RESERVED are reserved for privileged processes (e.g. root),

 * unless a kernel is compiled with IPNOPRIVPORTS defined.

 *

 * When a user does a bind(2) or connect(2) with a port number of zero,

 * a non-conflicting local port address is chosen.

 *

 * The default range is IPPORT_ANONMIN to IPPORT_ANONMAX, although

 * that is settable by sysctl(3); net.inet.ip.anonportmin and

 * net.inet.ip.anonportmax respectively.

 *

 * A user may set the IPPROTO_IP option IP_PORTRANGE to change this

 * default assignment range.

 *

 * The value IP_PORTRANGE_DEFAULT causes the default behavior.

 *

 * The value IP_PORTRANGE_HIGH is the same as IP_PORTRANGE_DEFAULT,

 * and exists only for FreeBSD compatibility purposes.

 *

 * The value IP_PORTRANGE_LOW changes the range to the "low" are

 * that is (by convention) restricted to privileged processes.

 * This convention is based on "vouchsafe" principles only.

 * It is only secure if you trust the remote host to restrict these ports.

 * The range is IPPORT_RESERVEDMIN to IPPORT_RESERVEDMAX.

 */

#define        IPPORT_RESERVED                1024

#define        IPPORT_ANONMIN                49152

#define        IPPORT_ANONMAX                65535

#define        IPPORT_RESERVEDMIN        600

#define        IPPORT_RESERVEDMAX        (IPPORT_RESERVED-1)

/*

 * Internet address (a structure for historical reasons)

 */

struct in_addr {

        in_addr_t s_addr;

} __packed;

/*

 * Definitions of bits in internet address integers.

 * On subnets, the decomposition of addresses to host and net parts

 * is done according to subnet mask, not the masks here.

 *

 * By byte-swapping the constants, we avoid ever having to byte-swap IP

 * addresses inside the kernel.  Unfortunately, user-level programs rely

 * on these macros not doing byte-swapping.

 */

#ifdef _KERNEL

#define        __IPADDR(x)        ((uint32_t) htonl((uint32_t)(x)))

#else

#define        __IPADDR(x)        ((uint32_t)(x))

#endif

#define        IN_CLASSA(i)                (((uint32_t)(i) & __IPADDR(0x80000000)) == \

                                 __IPADDR(0x00000000))

#define        IN_CLASSA_NET                __IPADDR(0xff000000)

#define        IN_CLASSA_NSHIFT        24

#define        IN_CLASSA_HOST                __IPADDR(0x00ffffff)

#define        IN_CLASSA_MAX                128

#define        IN_CLASSB(i)                (((uint32_t)(i) & __IPADDR(0xc0000000)) == \

                                 __IPADDR(0x80000000))

#define        IN_CLASSB_NET                __IPADDR(0xffff0000)

#define        IN_CLASSB_NSHIFT        16

#define        IN_CLASSB_HOST                __IPADDR(0x0000ffff)

#define        IN_CLASSB_MAX                65536

#define        IN_CLASSC(i)                (((uint32_t)(i) & __IPADDR(0xe0000000)) == \

                                 __IPADDR(0xc0000000))

#define        IN_CLASSC_NET                __IPADDR(0xffffff00)

#define        IN_CLASSC_NSHIFT        8

#define        IN_CLASSC_HOST                __IPADDR(0x000000ff)

#define        IN_CLASSD(i)                (((uint32_t)(i) & __IPADDR(0xf0000000)) == \

                                 __IPADDR(0xe0000000))

/* These ones aren't really net and host fields, but routing needn't know. */

#define        IN_CLASSD_NET                __IPADDR(0xf0000000)

#define        IN_CLASSD_NSHIFT        28

#define        IN_CLASSD_HOST                __IPADDR(0x0fffffff)

#define        IN_MULTICAST(i)                IN_CLASSD(i)

#define        IN_EXPERIMENTAL(i)        (((uint32_t)(i) & __IPADDR(0xf0000000)) == \

                                 __IPADDR(0xf0000000))

#define        IN_BADCLASS(i)                (((uint32_t)(i) & __IPADDR(0xf0000000)) == \

                                 __IPADDR(0xf0000000))

#define IN_LINKLOCAL(i)        (((uint32_t)(i) & __IPADDR(0xffff0000)) == \

                         __IPADDR(0xa9fe0000))

#define        IN_PRIVATE(i)        ((((uint32_t)(i) & __IPADDR(0xff000000)) ==        \

                          __IPADDR(0x0a000000))        ||                        \

                         (((uint32_t)(i) & __IPADDR(0xfff00000)) ==        \

                          __IPADDR(0xac100000))        ||                        \

                         (((uint32_t)(i) & __IPADDR(0xffff0000)) ==        \

                          __IPADDR(0xc0a80000)))

#define        IN_LOCAL_GROUP(i)        (((uint32_t)(i) & __IPADDR(0xffffff00)) == \

                                 __IPADDR(0xe0000000))

#define        IN_ANY_LOCAL(i)                (IN_LINKLOCAL(i) || IN_LOCAL_GROUP(i))

#define        INADDR_ANY                __IPADDR(0x00000000)

#define        INADDR_LOOPBACK                __IPADDR(0x7f000001)

#define        INADDR_BROADCAST        __IPADDR(0xffffffff)        /* must be masked */

#define        INADDR_NONE                __IPADDR(0xffffffff)        /* -1 return */

#define        INADDR_UNSPEC_GROUP        __IPADDR(0xe0000000)        /* 224.0.0.0 */

#define        INADDR_ALLHOSTS_GROUP        __IPADDR(0xe0000001)        /* 224.0.0.1 */

#define        INADDR_ALLRTRS_GROUP        __IPADDR(0xe0000002)        /* 224.0.0.2 */

#define        INADDR_CARP_GROUP        __IPADDR(0xe0000012)        /* 224.0.0.18 */

#define        INADDR_MAX_LOCAL_GROUP        __IPADDR(0xe00000ff)        /* 224.0.0.255 */

#define        IN_LOOPBACKNET                127                        /* official! */

/*

 * 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;

        __int8_t        sin_zero[8];

};

#define        INET_ADDRSTRLEN                 16

/*

 * Structure used to describe IP options.

 * Used to store options internally, to pass them to a process,

 * or to restore options retrieved earlier.

 * The ip_dst is used for the first-hop gateway when using a source route

 * (this gets put into the header proper).

 */

struct ip_opts {

        struct in_addr        ip_dst;                /* first hop, 0 w/o src rt */

#if defined(__cplusplus)

        __int8_t        Ip_opts[40];        /* actually variable in size */

#else

        __int8_t        ip_opts[40];        /* actually variable in size */

#endif

};

/*

 * Options for use with [gs]etsockopt at the IP level.

 * First word of comment is data type; bool is stored in int.

 */

#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_RETOPTS                8    /* ip_opts; set/get IP options */

#define        IP_MULTICAST_IF                9    /* in_addr; 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 */

/* The add and drop membership option numbers need to match with the v6 ones */

#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_PORTALGO                18   /* int; port selection algo (rfc6056) */

#define        IP_PORTRANGE                19   /* int; range to use for ephemeral port */

#define        IP_RECVIF                20   /* bool; receive reception if w/dgram */

#define        IP_ERRORMTU                21   /* int; get MTU of last xmit = EMSGSIZE */

#define        IP_IPSEC_POLICY                22   /* struct; get/set security policy */

#define        IP_RECVTTL                23   /* bool; receive IP TTL w/dgram */

#define        IP_MINTTL                24   /* minimum TTL for packet or drop */

#define        IP_PKTINFO                25   /* int; send interface and src addr */

#define        IP_RECVPKTINFO                26   /* int; send interface and dst addr */

/*

 * Information sent in the control message of a datagram socket for

 * IP_PKTINFO and IP_RECVPKTINFO.

 */

struct in_pktinfo {

        struct in_addr        ipi_addr;        /* src/dst address */

        unsigned int ipi_ifindex;        /* interface index */

};

/*

 * Defaults and limits for options

 */

#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; must fit in one mbuf */

/*

 * Argument structure for IP_ADD_MEMBERSHIP and IP_DROP_MEMBERSHIP.

 */

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:

 * - which range to search when port is unspecified at bind() or connect()

 */

#define        IP_PORTRANGE_DEFAULT        0        /* default range */

#define        IP_PORTRANGE_HIGH        1        /* same as DEFAULT (FreeBSD compat) */

#define        IP_PORTRANGE_LOW        2        /* use privileged range */

#if defined(_NETBSD_SOURCE)

/*

 * Definitions for inet sysctl operations.

 *

 * Third level is protocol number.

 * Fourth level is desired variable within that protocol.

 */

#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 }, \

}

/*

 * Names for IP sysctl objects

 */

#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_FORWSRCRT                5        /* forward source-routed packets */

#define        IPCTL_DIRECTEDBCAST        6        /* default broadcast behavior */

#define        IPCTL_ALLOWSRCRT        7        /* allow/drop all source-routed pkts */

#define        IPCTL_SUBNETSARELOCAL        8        /* treat subnets as local addresses */

#define        IPCTL_MTUDISC                9        /* allow path MTU discovery */

#define        IPCTL_ANONPORTMIN      10        /* minimum ephemeral port */

#define        IPCTL_ANONPORTMAX      11        /* maximum ephemeral port */

#define        IPCTL_MTUDISCTIMEOUT   12        /* allow path MTU discovery */

#define        IPCTL_MAXFLOWS         13        /* maximum ip flows allowed */

#define        IPCTL_HOSTZEROBROADCAST 14        /* is host zero a broadcast addr? */

#define        IPCTL_GIF_TTL                15        /* default TTL for gif encap packet */

#define        IPCTL_LOWPORTMIN       16        /* minimum reserved port */

#define        IPCTL_LOWPORTMAX       17        /* maximum reserved port */

#define        IPCTL_MAXFRAGPACKETS   18        /* max packets reassembly queue */

#define        IPCTL_GRE_TTL          19        /* default TTL for gre encap packet */

#define        IPCTL_CHECKINTERFACE   20        /* drop pkts in from 'wrong' iface */

#define        IPCTL_IFQ               21        /* IP packet input queue */

#define        IPCTL_RANDOMID               22        /* use random IP ids (if configured) */

#define        IPCTL_LOOPBACKCKSUM    23        /* do IP checksum on loopback */

#define        IPCTL_STATS                24        /* IP statistics */

#define        IPCTL_DAD_COUNT        25        /* DAD packets to send */

#define        IPCTL_MAXID               26

#define        IPCTL_NAMES { \

        { 0, 0 }, \

        { "forwarding", CTLTYPE_INT }, \

        { "redirect", CTLTYPE_INT }, \

        { "ttl", CTLTYPE_INT }, \

        { "mtu", CTLTYPE_INT }, \

        { "forwsrcrt", CTLTYPE_INT }, \

        { "directed-broadcast", CTLTYPE_INT }, \

        { "allowsrcrt", CTLTYPE_INT }, \

        { "subnetsarelocal", CTLTYPE_INT }, \

        { "mtudisc", CTLTYPE_INT }, \

        { "anonportmin", CTLTYPE_INT }, \

        { "anonportmax", CTLTYPE_INT }, \

        { "mtudisctimeout", CTLTYPE_INT }, \

        { "maxflows", CTLTYPE_INT }, \

        { "hostzerobroadcast", CTLTYPE_INT }, \

        { "gifttl", CTLTYPE_INT }, \

        { "lowportmin", CTLTYPE_INT }, \

        { "lowportmax", CTLTYPE_INT }, \

        { "maxfragpackets", CTLTYPE_INT }, \

        { "grettl", CTLTYPE_INT }, \

        { "checkinterface", CTLTYPE_INT }, \

        { "ifq", CTLTYPE_NODE }, \

        { "random_id", CTLTYPE_INT }, \

        { "do_loopback_cksum", CTLTYPE_INT }, \

        { "stats", CTLTYPE_STRUCT }, \

        { "dad_count", CTLTYPE_INT }, \

}

#endif /* _NETBSD_SOURCE */

/* INET6 stuff */

#define        __KAME_NETINET_IN_H_INCLUDED_

#include <netinet6/in6.h>

#undef __KAME_NETINET_IN_H_INCLUDED_

#ifdef _KERNEL

/*

 * in_cksum_phdr:

 *

 *        Compute significant parts of the IPv4 checksum pseudo-header

 *        for use in a delayed TCP/UDP checksum calculation.

 *

 *        Args:

 *

 *                src                Source IP address

 *                dst                Destination IP address

 *                lenproto        htons(proto-hdr-len + proto-number)

 */

static __inline u_int16_t __unused

in_cksum_phdr(u_int32_t src, u_int32_t dst, u_int32_t lenproto)

{

        u_int32_t sum;

        sum = lenproto +

              (u_int16_t)(src >> 16) +

              (u_int16_t)(src /*& 0xffff*/) +

              (u_int16_t)(dst >> 16) +

              (u_int16_t)(dst /*& 0xffff*/);

        sum = (u_int16_t)(sum >> 16) + (u_int16_t)(sum /*& 0xffff*/);

        if (sum > 0xffff)

                sum -= 0xffff;

        return (sum);

}

/*

 * in_cksum_addword:

 *

 *        Add the two 16-bit network-order values, carry, and return.

 */

static __inline u_int16_t __unused

in_cksum_addword(u_int16_t a, u_int16_t b)

{

        u_int32_t sum = a + b;

        if (sum > 0xffff)

                sum -= 0xffff;

        return (sum);

}

extern        struct in_addr zeroin_addr;

extern        u_char        ip_protox[];

extern const struct sockaddr_in in_any;

int        in_broadcast(struct in_addr, struct ifnet *);

int        in_canforward(struct in_addr);

int        cpu_in_cksum(struct mbuf *, int, int, uint32_t);

int        in_cksum(struct mbuf *, int);

int        in4_cksum(struct mbuf *, u_int8_t, int, int);

void        in_delayed_cksum(struct mbuf *);

int        in_localaddr(struct in_addr);

void        in_socktrim(struct sockaddr_in *);

void        in_if_link_up(struct ifnet *);

void        in_if_link_down(struct ifnet *);

void        in_if_up(struct ifnet *);

void        in_if_down(struct ifnet *);

void        in_if_link_state_change(struct ifnet *, int);

struct route;

struct ip_moptions;

struct sockaddr_in *in_selectsrc(struct sockaddr_in *,

        struct route *, int, struct ip_moptions *, int *);

#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        satocsin(sa)        ((const struct sockaddr_in *)(sa))

#define        sintosa(sin)        ((struct sockaddr *)(sin))

#define        sintocsa(sin)        ((const struct sockaddr *)(sin))

#define        ifatoia(ifa)        ((struct in_ifaddr *)(ifa))

int sockaddr_in_cmp(const struct sockaddr *, const struct sockaddr *);

const void *sockaddr_in_const_addr(const struct sockaddr *, socklen_t *);

void *sockaddr_in_addr(struct sockaddr *, socklen_t *);

static inline void

sockaddr_in_init1(struct sockaddr_in *sin, const struct in_addr *addr,

    in_port_t port)

{

        sin->sin_port = port;

        sin->sin_addr = *addr;

        memset(sin->sin_zero, 0, sizeof(sin->sin_zero));

}

static inline void

sockaddr_in_init(struct sockaddr_in *sin, const struct in_addr *addr,

    in_port_t port)

{

        sin->sin_family = AF_INET;

        sin->sin_len = sizeof(*sin);

        sockaddr_in_init1(sin, addr, port);

}

static inline struct sockaddr *

sockaddr_in_alloc(const struct in_addr *addr, in_port_t port, int flags)

{

        struct sockaddr *sa;

        sa = sockaddr_alloc(AF_INET, sizeof(struct sockaddr_in), flags);

        if (sa == NULL)

                return NULL;

        sockaddr_in_init1(satosin(sa), addr, port);

        return sa;

}

#endif /* _KERNEL */

#if defined(_KERNEL) || defined(_TEST)

int        in_print(char *, size_t, const struct in_addr *);

#define IN_PRINT(b, a)        (in_print((b), sizeof(b), a), (b))

int        sin_print(char *, size_t, const void *);

#endif

#endif /* !_NETINET_IN_H_ */