This is xnu-8019. See this file in:
/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 *
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 *
 * Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 *
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
 */
/*
 * Copyright (C) 1993-1997 by Darren Reed.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that this notice is preserved and due credit is given
 * to the original author and the contributors.
 *
 * @(#)ip_compat.h	1.8 1/14/96
 */
#ifndef DRIVERKIT
#include <sys/appleapiopts.h>
#endif /* DRIVERKIT */

#if 0

#ifndef __IP_COMPAT_H__
#define __IP_COMPAT_H__

#ifndef __STDC__
# define        const
#endif

#ifndef SOLARIS
#define SOLARIS (defined(sun) && (defined(__svr4__) || defined(__SVR4)))
#endif

#if defined(_KERNEL) && !defined(KERNEL)
# define        KERNEL
#endif
#if defined(KERNEL) && !defined(_KERNEL)
# define        _KERNEL
#endif
#if!defined(__KERNEL__) && defined(KERNEL)
# define        __KERNEL__
#endif

#if defined(__SVR4) || defined(__svr4__) || defined(__sgi)
#define index   strchr
# if !defined(_KERNEL)
#  define       bzero(a, b)      memset(a,0,b)
#  define       bcmp            memcmp
#  define       bcopy(a, b, c)    memmove(b,a,c)
# endif
#endif

struct  ether_addr {
	u_char  ether_addr_octet[6];
};

#ifdef  linux
# include <sys/sysmacros.h>
#endif
#if     SOLARIS
# define        MTYPE(m)        ((m)->b_datap->db_type)
# include       <sys/ioccom.h>
# include       <sys/sysmacros.h>
# include       <sys/kmem.h>
/*
 * because Solaris 2 defines these in two places :-/
 */
# undef IPOPT_EOL
# undef IPOPT_NOP
# undef IPOPT_LSRR
# undef IPOPT_RR
# undef IPOPT_SSRR
# ifndef        _KERNEL
#  define       _KERNEL
#  undef        RES_INIT
#  include <inet/common.h>
#  include <inet/ip.h>
#  include <inet/ip_ire.h>
#  undef        _KERNEL
# else /* _KERNEL */
#  include <inet/common.h>
#  include <inet/ip.h>
#  include <inet/ip_ire.h>
# endif /* _KERNEL */
#endif /* SOLARIS */
#define IPMINLEN(i, h)  ((i)->ip_len >= ((i)->ip_hl * 4 + sizeof(struct h)))

#ifndef IP_OFFMASK
#define IP_OFFMASK      0x1fff
#endif

#if     BSD > 199306
# define        USE_QUAD_T
# define        U_QUAD_T        u_quad_t
# define        QUAD_T          quad_t
#else /* BSD > 199306 */
# define        U_QUAD_T        u_int32_t
# define        QUAD_T          long
#endif /* BSD > 199306 */

/*
 * These operating systems already take care of the problem for us.
 */
#if defined(__NetBSD__) || defined(__OpenBSD__) || defined(__FreeBSD__) || \
        defined(__sgi)
typedef u_int32_t       u_32_t;
#else
/*
 * Really, any arch where sizeof(long) != sizeof(int).
 */
# if defined(__alpha__) || defined(__alpha)
typedef unsigned int    u_32_t;
# else
typedef u_int32_t   u_32_t;
# endif
#endif /* __NetBSD__ || __OpenBSD__ || __FreeBSD__ || __sgi */

#ifndef MAX
#define MAX(a, b)        (((a) > (b)) ? (a) : (b))
#endif

/*
 * Security Options for Intenet Protocol (IPSO) as defined in RFC 1108.
 *
 * Basic Option
 *
 * 00000001   -   (Reserved 4)
 * 00111101   -   Top Secret
 * 01011010   -   Secret
 * 10010110   -   Confidential
 * 01100110   -   (Reserved 3)
 * 11001100   -   (Reserved 2)
 * 10101011   -   Unclassified
 * 11110001   -   (Reserved 1)
 */
#define IPSO_CLASS_RES4         0x01
#define IPSO_CLASS_TOPS         0x3d
#define IPSO_CLASS_SECR         0x5a
#define IPSO_CLASS_CONF         0x96
#define IPSO_CLASS_RES3         0x66
#define IPSO_CLASS_RES2         0xcc
#define IPSO_CLASS_UNCL         0xab
#define IPSO_CLASS_RES1         0xf1

#define IPSO_AUTH_GENSER        0x80
#define IPSO_AUTH_ESI           0x40
#define IPSO_AUTH_SCI           0x20
#define IPSO_AUTH_NSA           0x10
#define IPSO_AUTH_DOE           0x08
#define IPSO_AUTH_UN            0x06
#define IPSO_AUTH_FTE           0x01

/*
 * IP option #defines
 */
/*#define	IPOPT_RR	7 */
#define IPOPT_ZSU       10      /* ZSU */
#define IPOPT_MTUP      11      /* MTUP */
#define IPOPT_MTUR      12      /* MTUR */
#define IPOPT_ENCODE    15      /* ENCODE */
/*#define	IPOPT_TS	68 */
#define IPOPT_TR        82      /* TR */
/*#define	IPOPT_SECURITY	130 */
/*#define	IPOPT_LSRR	131 */
#define IPOPT_E_SEC     133     /* E-SEC */
#define IPOPT_CIPSO     134     /* CIPSO */
/*#define	IPOPT_SATID	136 */
#ifndef IPOPT_SID
# define        IPOPT_SID       IPOPT_SATID
#endif
/*#define	IPOPT_SSRR	137 */
#define IPOPT_ADDEXT    147     /* ADDEXT */
#define IPOPT_VISA      142     /* VISA */
#define IPOPT_IMITD     144     /* IMITD */
#define IPOPT_EIP       145     /* EIP */
#define IPOPT_FINN      205     /* FINN */


#if defined(__FreeBSD__) && defined(KERNEL)
# if __FreeBSD__ < 3
#  include <machine/spl.h>
# endif
#endif /* __FreeBSD__ && KERNEL */

/*
 * Build some macros and #defines to enable the same code to compile anywhere
 * Well, that's the idea, anyway :-)
 */
#ifdef KERNEL
# if SOLARIS
#  define       MUTEX_ENTER(x)  mutex_enter(x)
#  define       MUTEX_EXIT(x)   mutex_exit(x)
#  define       MTOD(m, t)       (t)((m)->b_rptr)
#  define       IRCOPY(a, b, c)   copyin((a), (b), (c))
#  define       IWCOPY(a, b, c)   copyout((a), (b), (c))
#  define       FREE_MB_T(m)    freemsg(m)
#  define       SPL_NET(x)      ;
#  define       SPL_IMP(x)      ;
#  undef        SPL_X
#  define       SPL_X(x)        ;
#  ifdef sparc
#   define      ntohs(x)        (x)
#   define      ntohl(x)        (x)
#   define      htons(x)        (x)
#   define      htonl(x)        (x)
#  endif /* sparc */
#  define       KMALLOC(a, b, c)  (a) = (b)kmem_alloc((c), KM_NOSLEEP)
#  define       GET_MINOR(x)    getminor(x)
typedef struct  qif     {
	struct  qif     *qf_next;
	ill_t   *qf_ill;
	kmutex_t        qf_lock;
	void    *qf_iptr;
	void    *qf_optr;
	queue_t *qf_in;
	queue_t *qf_out;
	struct  qinit   *qf_wqinfo;
	struct  qinit   *qf_rqinfo;
	struct  qinit   qf_wqinit;
	struct  qinit   qf_rqinit;
	mblk_t  *qf_m;  /* These three fields are for passing data up from */
	queue_t *qf_q;  /* fr_qin and fr_qout to the packet processing. */
	int     qf_off;
	int     qf_len; /* this field is used for in ipfr_fastroute */
	char    qf_name[8];
	/*
	 * in case the ILL has disappeared...
	 */
	int     qf_hl;  /* header length */
} qif_t;
extern  ill_t   *get_unit(char *);
#  define       GETUNIT(n)      get_unit((n))
# else /* SOLARIS */
#  if defined(__sgi)
#   include <sys/ksynch.h>
#   define      IPF_LOCK_PL     plhi
#   include <sys/sema.h>
#undef kmutex_t
typedef struct {
	lock_t *l;
	int pl;
} kmutex_t;
#   define      MUTEX_ENTER(x)  (x)->pl = LOCK((x)->l, IPF_LOCK_PL);
#   define      MUTEX_EXIT(x)   UNLOCK((x)->l, (x)->pl);
#  else /* __sgi */
#   define      MUTEX_ENTER(x)  ;
#   define      MUTEX_EXIT(x)   ;
#  endif /* __sgi */
#  ifndef linux
#   define      FREE_MB_T(m)    m_freem(m)
#   define      MTOD(m, t)       mtod(m,t)
#   define      IRCOPY(a, b, c)   bcopy((a), (b), (c))
#   define      IWCOPY(a, b, c)   bcopy((a), (b), (c))
#  endif /* !linux */
# endif /* SOLARIS */

# ifdef sun
#  if !SOLARIS
#   include     <sys/kmem_alloc.h>
#   define      GETUNIT(n)      ifunit((n), IFNAMSIZ)
#  endif
# else
#  ifndef       linux
#   define      GETUNIT(n)      ifunit((n))
#  endif
# endif /* sun */

# if defined(sun) && !defined(linux) || defined(__sgi)
#  define       UIOMOVE(a, b, c, d)        uiomove((caddr_t)a,b,c,d)
#  define       SLEEP(id, n)    sleep((id), PZERO+1)
#  define       WAKEUP(id)      wakeup(id)
#  define       KFREE(x)        kmem_free((char *)(x), sizeof(*(x)))
#  define       KFREES(x, s)     kmem_free((char *)(x), (s))
#  if !SOLARIS
extern  void    m_copydata(struct mbuf *, int, int, caddr_t);
extern  void    m_copyback(struct mbuf *, int, int, caddr_t);
#  endif
#  ifdef __sgi
#   include <sys/kmem.h>
#   include <sys/ddi.h>
#   define      KMALLOC(a, b, c)  (a) = (b)kmem_alloc((c), KM_NOSLEEP)
#   define      GET_MINOR(x)    getminor(x)
#  else
#   if !SOLARIS
#    define     KMALLOC(a, b, c)  (a) = (b)new_kmem_alloc((c), KMEM_NOSLEEP)
#   endif /* SOLARIS */
#  endif /* __sgi */
# endif /* sun && !linux */
# ifndef        GET_MINOR
#  define       GET_MINOR(x)    minor(x)
# endif
# if (BSD >= 199306) || defined(__FreeBSD__)
#  include <vm/vm.h>
#  if !defined(__FreeBSD__) || (defined (__FreeBSD__) && __FreeBSD__ >= 3)
#   include <vm/vm_extern.h>
#   include <sys/proc.h>
extern  vm_map_t        kmem_map;
#  else /* !__FreeBSD__ || (__FreeBSD__ && __FreeBSD__>=3) */
#   include <vm/vm_kern.h>
#  endif /* !__FreeBSD__ || (__FreeBSD__ && __FreeBSD__>=3) */
#  ifdef        M_PFIL
#   define      KMALLOC(a, b, c)        MALLOC((a), b, (c), M_PFIL, M_NOWAIT)
#   define      KFREE(x)        FREE((x), M_PFIL)
#   define      KFREES(x, s)     FREE((x), M_PFIL)
#  else
#   define      KMALLOC(a, b, c)        MALLOC((a), b, (c), M_TEMP, M_NOWAIT)
#   define      KFREE(x)        FREE((x), M_TEMP)
#   define      KFREES(x, s)     FREE((x), M_TEMP)
#  endif /* M_PFIL */
#  define       UIOMOVE(a, b, c, d)        uiomove(a,b,d)
#  define       SLEEP(id, n)    tsleep((id), PPAUSE|PCATCH, n, 0)
#  define       WAKEUP(id)      wakeup(id)
# endif /* BSD */
# if defined(NetBSD) && NetBSD <= 1991011 && NetBSD >= 199407
#  define       SPL_NET(x)      x = splsoftnet()
#  define       SPL_X(x)        (void) splx(x)
# else
#  if !SOLARIS && !defined(linux)
#   define      SPL_IMP(x)      ;
#   define      SPL_NET(x)      ;
#   define      SPL_X(x)        ;
#  endif
# endif /* NetBSD && NetBSD <= 1991011 && NetBSD >= 199407 */
# define        PANIC(x, y)      if (x) panic y
#else /* KERNEL */
# define        SLEEP(x, y)      ;
# define        WAKEUP(x)       ;
# define        PANIC(x, y)      ;
# define        MUTEX_ENTER(x)  ;
# define        MUTEX_EXIT(x)   ;
# define        SPL_NET(x)      ;
# define        SPL_IMP(x)      ;
# undef         SPL_X
# define        SPL_X(x)        ;
/*# define	KMALLOC(a,b,c)	(a) = (b)malloc(c) */
# define        KFREE(x)        FREE(x)
# define        KFREES(x, s)     FREE(x)
# define        GETUNIT(x)      get_unit(x)
# define        IRCOPY(a, b, c)   bcopy((a), (b), (c))
# define        IWCOPY(a, b, c)   bcopy((a), (b), (c))
#endif /* KERNEL */

#if SOLARIS
typedef mblk_t mb_t;
#else
# ifdef linux
typedef struct sk_buff mb_t;
# else
typedef struct mbuf mb_t;
# endif
#endif /* SOLARIS */

#if defined(linux) || defined(__sgi)
/*
 * These #ifdef's are here mainly for linux, but who knows, they may
 * not be in other places or maybe one day linux will grow up and some
 * of these will turn up there too.
 */
#ifndef ICMP_MINLEN
# define        ICMP_MINLEN     8
#endif
#ifndef ICMP_UNREACH
# define        ICMP_UNREACH    ICMP_DEST_UNREACH
#endif
#ifndef ICMP_SOURCEQUENCH
# define        ICMP_SOURCEQUENCH       ICMP_SOURCE_QUENCH
#endif
#ifndef ICMP_TIMXCEED
# define        ICMP_TIMXCEED   ICMP_TIME_EXCEEDED
#endif
#ifndef ICMP_PARAMPROB
# define        ICMP_PARAMPROB  ICMP_PARAMETERPROB
#endif
#ifndef ICMP_TSTAMP
# define        ICMP_TSTAMP     ICMP_TIMESTAMP
#endif
#ifndef ICMP_TSTAMPREPLY
# define        ICMP_TSTAMPREPLY        ICMP_TIMESTAMPREPLY
#endif
#ifndef ICMP_IREQ
# define        ICMP_IREQ       ICMP_INFO_REQUEST
#endif
#ifndef ICMP_IREQREPLY
# define        ICMP_IREQREPLY  ICMP_INFO_REPLY
#endif
#ifndef ICMP_MASKREQ
# define        ICMP_MASKREQ    ICMP_ADDRESS
#endif
#ifndef ICMP_MASKREPLY
# define        ICMP_MASKREPLY  ICMP_ADDRESSREPLY
#endif
#ifndef IPVERSION
# define        IPVERSION       4
#endif
#ifndef IPOPT_MINOFF
# define        IPOPT_MINOFF    4
#endif
#ifndef IPOPT_COPIED
# define        IPOPT_COPIED(x) ((x)&0x80)
#endif
#ifndef IPOPT_EOL
# define        IPOPT_EOL       0
#endif
#ifndef IPOPT_NOP
# define        IPOPT_NOP       1
#endif
#ifndef IP_MF
# define        IP_MF   ((u_short)0x2000)
#endif
#ifndef ETHERTYPE_IP
# define        ETHERTYPE_IP    ((u_short)0x0800)
#endif
#ifndef TH_FIN
# define        TH_FIN  0x01
#endif
#ifndef TH_SYN
# define        TH_SYN  0x02
#endif
#ifndef TH_RST
# define        TH_RST  0x04
#endif
#ifndef TH_PUSH
# define        TH_PUSH 0x08
#endif
#ifndef TH_ACK
# define        TH_ACK  0x10
#endif
#ifndef TH_URG
# define        TH_URG  0x20
#endif
#ifndef IPOPT_EOL
# define        IPOPT_EOL       0
#endif
#ifndef IPOPT_NOP
# define        IPOPT_NOP       1
#endif
#ifndef IPOPT_RR
# define        IPOPT_RR        7
#endif
#ifndef IPOPT_TS
# define        IPOPT_TS        68
#endif
#ifndef IPOPT_SECURITY
# define        IPOPT_SECURITY  130
#endif
#ifndef IPOPT_LSRR
# define        IPOPT_LSRR      131
#endif
#ifndef IPOPT_SATID
# define        IPOPT_SATID     136
#endif
#ifndef IPOPT_SSRR
# define        IPOPT_SSRR      137
#endif
#ifndef IPOPT_SECUR_UNCLASS
# define        IPOPT_SECUR_UNCLASS     ((u_short)0x0000)
#endif
#ifndef IPOPT_SECUR_CONFID
# define        IPOPT_SECUR_CONFID      ((u_short)0xf135)
#endif
#ifndef IPOPT_SECUR_EFTO
# define        IPOPT_SECUR_EFTO        ((u_short)0x789a)
#endif
#ifndef IPOPT_SECUR_MMMM
# define        IPOPT_SECUR_MMMM        ((u_short)0xbc4d)
#endif
#ifndef IPOPT_SECUR_RESTR
# define        IPOPT_SECUR_RESTR       ((u_short)0xaf13)
#endif
#ifndef IPOPT_SECUR_SECRET
# define        IPOPT_SECUR_SECRET      ((u_short)0xd788)
#endif
#ifndef IPOPT_SECUR_TOPSECRET
# define        IPOPT_SECUR_TOPSECRET   ((u_short)0x6bc5)
#endif
#ifndef IPOPT_OLEN
# define        IPOPT_OLEN      1
#endif
#endif /* linux || __sgi */

#ifdef  linux
/*
 * TCP States
 */
#define TCPS_CLOSED             0       /* closed */
#define TCPS_LISTEN             1       /* listening for connection */
#define TCPS_SYN_SENT           2       /* active, have sent syn */
#define TCPS_SYN_RECEIVED       3       /* have send and received syn */
/* states < TCPS_ESTABLISHED are those where connections not established */
#define TCPS_ESTABLISHED        4       /* established */
#define TCPS_CLOSE_WAIT         5       /* rcvd fin, waiting for close */
/* states > TCPS_CLOSE_WAIT are those where user has closed */
#define TCPS_FIN_WAIT_1         6       /* have closed, sent fin */
#define TCPS_CLOSING            7       /* closed xchd FIN; await FIN ACK */
#define TCPS_LAST_ACK           8       /* had fin and close; await FIN ACK */
/* states > TCPS_CLOSE_WAIT && < TCPS_FIN_WAIT_2 await ACK of FIN */
#define TCPS_FIN_WAIT_2         9       /* have closed, fin is acked */
#define TCPS_TIME_WAIT          10      /* in 2*msl quiet wait after close */

/*
 * file flags.
 */
#define FWRITE  WRITE
#define FREAD   READ
/*
 * mbuf related problems.
 */
#define mtod(m, t)       (t)((m)->data)
#define m_len           len
#define m_next          next

#define IP_DF           0x8000

typedef struct  {
	__u16   th_sport;
	__u16   th_dport;
	__u32   th_seq;
	__u32   th_ack;
# if defined(__i386__) || defined(__MIPSEL__) || defined(__alpha__) || \
	defined(vax)
	__u8    th_res:4;
	__u8    th_off:4;
#else
	__u8    th_off:4;
	__u8    th_res:4;
#endif
	__u8    th_flags;
	__u16   th_win;
	__u16   th_sum;
	__u16   th_urp;
} tcphdr_t;

typedef struct  {
	__u16   uh_sport;
	__u16   uh_dport;
	__u16   uh_ulen;
	__u16   uh_sum;
} udphdr_t;

typedef struct  {
# if defined(__i386__) || defined(__MIPSEL__) || defined(__alpha__) || \
	defined(vax)
	__u8    ip_hl:4;
	__u8    ip_v:4;
# else
	__u8    ip_hl:4;
	__u8    ip_v:4;
# endif
	__u8    ip_tos;
	__u16   ip_len;
	__u16   ip_id;
	__u16   ip_off;
	__u8    ip_ttl;
	__u8    ip_p;
	__u16   ip_sum;
	struct  in_addr ip_src;
	struct  in_addr ip_dst;
} ip_t;

/*
 * Structure of an icmp header.
 */
typedef struct icmp {
	u_char  icmp_type;              /* type of message, see below */
	u_char  icmp_code;              /* type sub code */
	u_short icmp_cksum;             /* ones complement cksum of struct */
	union {
		u_char ih_pptr;                 /* ICMP_PARAMPROB */
		struct in_addr ih_gwaddr;       /* ICMP_REDIRECT */
		struct ih_idseq {
			n_short icd_id;
			n_short icd_seq;
		} ih_idseq;
		int ih_void;
	} icmp_hun;
# define        icmp_pptr       icmp_hun.ih_pptr
# define        icmp_gwaddr     icmp_hun.ih_gwaddr
# define        icmp_id         icmp_hun.ih_idseq.icd_id
# define        icmp_seq        icmp_hun.ih_idseq.icd_seq
# define        icmp_void       icmp_hun.ih_void
	union {
		struct id_ts {
			n_time its_otime;
			n_time its_rtime;
			n_time its_ttime;
		} id_ts;
		struct id_ip  {
			ip_t idi_ip;
			/* options and then 64 bits of data */
		} id_ip;
		u_int32_t       id_mask;
		char    id_data[1];
	} icmp_dun;
# define        icmp_otime      icmp_dun.id_ts.its_otime
# define        icmp_rtime      icmp_dun.id_ts.its_rtime
# define        icmp_ttime      icmp_dun.id_ts.its_ttime
# define        icmp_ip         icmp_dun.id_ip.idi_ip
# define        icmp_mask       icmp_dun.id_mask
# define        icmp_data       icmp_dun.id_data
} icmphdr_t;

# ifndef LINUX_IPOVLY
#  define LINUX_IPOVLY
struct ipovly {
	caddr_t ih_next, ih_prev;       /* for protocol sequence q's */
	u_char  ih_x1;                  /* (unused) */
	u_char  ih_pr;                  /* protocol */
	short   ih_len;                 /* protocol length */
	struct  in_addr ih_src;         /* source internet address */
	struct  in_addr ih_dst;         /* destination internet address */
};
# endif

typedef struct  {
	__u8    ether_dhost[6];
	__u8    ether_shost[6];
	__u16   ether_type;
} ether_header_t;

typedef struct  uio     {
	int     uio_resid;
	int     uio_rw;
	caddr_t uio_buf;
} uio_t;

# define        UIO_READ        0
# define        UIO_WRITE       1
# define        UIOMOVE(a, b, c, d)     uiomove(a,b,c,d)

/*
 * For masking struct ifnet onto struct device
 */
# define        if_name name

# ifdef KERNEL
#  define       GETUNIT(x)      dev_get(x)
#  define       FREE_MB_T(m)    kfree_skb(m, FREE_WRITE)
#  define       uniqtime        do_gettimeofday
#  undef INT_MAX
#  undef UINT_MAX
#  undef LONG_MAX
#  undef ULONG_MAX
#  include <linux/netdevice.h>
#  define       SPL_X(x)
#  define       SPL_NET(x)
#  define       SPL_IMP(x)

#  define       bcmp(a, b, c)     memcmp(a,b,c)
#  define       bcopy(a, b, c)    memcpy(b,a,c)
#  define       bzero(a, c)      memset(a,0,c)

#  define       UNITNAME(n)     dev_get((n))

#  define       KMALLOC(a, b, c)  (a) = (b)kmalloc((c), GFP_ATOMIC)
#  define       KFREE(x)        kfree_s((x), sizeof(*(x)))
#  define       KFREES(x, s)     kfree_s((x), (s))
#  define       IRCOPY(a, b, c)   {\
	                         error = verify_area(VERIFY_READ, (a) ,(c)); \
	                         if (!error) \
	                                memcpy_fromfs((b), (a), (c)); \
	                        }
#  define       IWCOPY(a, b, c)   {\
	                         error = verify_area(VERIFY_WRITE, (b), (c)); \
	                         if (!error) \
	                                memcpy_tofs((b), (a), (c)); \
	                        }
# else
#  define       __KERNEL__
#  undef INT_MAX
#  undef UINT_MAX
#  undef LONG_MAX
#  undef ULONG_MAX
#  define       s8 __s8
#  define       u8 __u8
#  define       s16 __s16
#  define       u16 __u16
#  define       s32 __s32
#  define       u32 __u32
#  include <linux/netdevice.h>
#  undef        __KERNEL__
# endif
# define        ifnet   device
#else
typedef struct  tcphdr  tcphdr_t;
typedef struct  udphdr  udphdr_t;
typedef struct  icmp    icmphdr_t;
typedef struct  ip      ip_t;
typedef struct  ether_header    ether_header_t;
#endif /* linux */
typedef struct  tcpiphdr        tcpiphdr_t;

#if defined(hpux) || defined(linux)
struct  ether_addr      {
	char    ether_addr_octet[6];
};
#endif

/*
 * XXX - This is one of those *awful* hacks which nobody likes
 */
#ifdef  ultrix
#define A_A
#else
#define A_A     &
#endif

#ifndef ICMP_ROUTERADVERT
# define        ICMP_ROUTERADVERT       9
#endif
#ifndef ICMP_ROUTERSOLICIT
# define        ICMP_ROUTERSOLICIT      10
#endif

#endif  /* __IP_COMPAT_H__ */

#endif /* #if 0 */