/*
 * Copyright (c) 1997-2001 by Sun Microsystems, Inc.
 * All rights reserved.
 */

/*
 * Copyright (c) 1982, 1986 Regents of the University of California.
 * All rights reserved.  The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 */

/*
 * Overlay for ip header used by other protocols (tcp, udp).
 */

#ifndef _NETINET_IP_VAR_H
#define _NETINET_IP_VAR_H

/* ip_var.h 1.11 88/08/19 SMI; from UCB 7.1 6/5/86      */

#include <sys/isa_defs.h>

#ifdef  __cplusplus
extern "C" {
#endif

struct ipovly {
#ifdef _LP64
        uint32_t        ih_next, ih_prev;
#else
        caddr_t ih_next, ih_prev;       /* for protocol sequence q's */
#endif
        uchar_t ih_x1;                  /* (unused) */
        uchar_t ih_pr;                  /* protocol */
        short   ih_len;                 /* protocol length */
        struct  in_addr ih_src;         /* source internet address */
        struct  in_addr ih_dst;         /* destination internet address */
};

/*
 * Ip reassembly queue structure.  Each fragment
 * being reassembled is attached to one of these structures.
 * They are timed out after ipq_ttl drops to 0, and may also
 * be reclaimed if memory becomes tight.
 */
struct ipq {
        struct  ipq *next, *prev;       /* to other reass headers */
        uchar_t ipq_ttl;                /* time for reass q to live */
        uchar_t ipq_p;                  /* protocol of this fragment */
        ushort_t ipq_id;                /* sequence id for reassembly */
        struct  ipasfrag *ipq_next, *ipq_prev;
                                        /* to ip headers of fragments */
        struct  in_addr ipq_src, ipq_dst;
};

/*
 * Ip header, when holding a fragment.
 *
 * Note: ipf_next must be at same offset as ipq_next above
 */
struct  ipasfrag {
#ifdef _BIT_FIELDS_LTOH
        uchar_t ip_hl:4,
                ip_v:4;
#else
        uchar_t ip_v:4,
                ip_hl:4;
#endif
        uchar_t ipf_mff;                /* copied from (ip_off&IP_MF) */
        short   ip_len;
        ushort_t ip_id;
        short   ip_off;
        uchar_t ip_ttl;
        uchar_t ip_p;
        ushort_t ip_sum;
        struct  ipasfrag *ipf_next;     /* next fragment */
        struct  ipasfrag *ipf_prev;     /* previous fragment */
};

/*
 * Structure stored in mbuf in inpcb.ip_options
 * and passed to ip_output when ip options are in use.
 * The actual length of the options (including ipopt_dst)
 * is in m_len.
 */
#define MAX_IPOPTLEN    40

struct ipoption {
        struct  in_addr ipopt_dst;      /* first-hop dst if source routed */
        char    ipopt_list[MAX_IPOPTLEN];       /* options proper */
};

struct  ipstat {
        long    ips_total;              /* total packets received */
        long    ips_badsum;             /* checksum bad */
        long    ips_tooshort;           /* packet too short */
        long    ips_toosmall;           /* not enough data */
        long    ips_badhlen;            /* ip header length < data size */
        long    ips_badlen;             /* ip length < ip header length */
        long    ips_fragments;          /* fragments received */
        long    ips_fragdropped;        /* frags dropped (dups, out of space) */
        long    ips_fragtimeout;        /* fragments timed out */
        long    ips_forward;            /* packets forwarded */
        long    ips_cantforward;        /* packets rcvd for unreachable dest */
        long    ips_redirectsent;       /* packets forwarded on same net */
};

#ifdef _KERNEL
/* flags passed to ip_output as last parameter */
#define IP_FORWARDING           0x1             /* most of ip header exists */
#define IP_ROUTETOIF            SO_DONTROUTE    /* bypass routing tables */
#define IP_ALLOWBROADCAST       SO_BROADCAST    /* can send broadcast packets */
#endif

#ifdef  __cplusplus
}
#endif

#endif  /* _NETINET_IP_VAR_H */