Logo Search packages:      
Sourcecode: nmap version File versions

IP_VAR.H

/*
 * Copyright (c) 1982, 1986, 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. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    This product includes software developed by the University of
 *    California, Berkeley and its contributors.
 * 4. 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.
 *
 *    @(#)ip_var.h      8.2 (Berkeley) 1/9/95
 */

#ifndef WIN32
#include <endian.h>
#else
typedef char *    caddr_t;
#include <winsock.h>
#ifndef LITTLE_ENDIAN
#define LITTLE_ENDIAN 1234
#define BIG_ENDIAN 4321
#define BYTE_ORDER LITTLE_ENDIAN 
#endif
#endif

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

/*
 * 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 */
      u_char      ipq_ttl;          /* time for reass q to live */
      u_char      ipq_p;                  /* protocol of this fragment */
      u_short     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 {
#if BYTE_ORDER == LITTLE_ENDIAN 
      u_char      ip_hl:4,
            ip_v:4;
#endif
#if BYTE_ORDER == BIG_ENDIAN 
      u_char      ip_v:4,
            ip_hl:4;
#endif
      u_char      ipf_mff;          /* XXX overlays ip_tos: use low bit
                               * to avoid destroying tos;
                               * copied from (ip_off&IP_MF) */
      short ip_len;
      u_short     ip_id;
      short ip_off;
      u_char      ip_ttl;
      u_char      ip_p;
      u_short     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 {
      n_long      ips_total;        /* total packets received */
      n_long      ips_badsum;       /* checksum bad */
      n_long      ips_tooshort;           /* packet too short */
      n_long      ips_toosmall;           /* not enough data */
      n_long      ips_badhlen;            /* ip header length < data size */
      n_long      ips_badlen;       /* ip length < ip header length */
      n_long      ips_fragments;          /* fragments received */
      n_long      ips_fragdropped;  /* frags dropped (dups, out of space) */
      n_long      ips_fragtimeout;  /* fragments timed out */
      n_long      ips_forward;            /* packets forwarded */
      n_long      ips_cantforward;  /* packets rcvd for unreachable dest */
      n_long      ips_redirectsent; /* packets forwarded on same net */
      n_long      ips_noproto;            /* unknown or unsupported protocol */
      n_long      ips_delivered;          /* datagrams delivered to upper level*/
      n_long      ips_localout;           /* total ip packets generated here */
      n_long      ips_odropped;           /* lost packets due to nobufs, etc. */
      n_long      ips_reassembled;  /* total packets reassembled ok */
      n_long      ips_fragmented;         /* datagrams sucessfully fragmented */
      n_long      ips_ofragments;         /* output fragments created */
      n_long      ips_cantfrag;           /* don't fragment flag was set, etc. */
      n_long      ips_badoptions;         /* error in option processing */
      n_long      ips_noroute;            /* packets discarded due to no route */
      n_long      ips_badvers;            /* ip version != 4 */
      n_long      ips_rawout;       /* total raw ip packets generated */
};

#ifdef KERNEL
/* flags passed to ip_output as last parameter */
#define     IP_FORWARDING           0x1         /* most of ip header exists */
#define     IP_RAWOUTPUT            0x2         /* raw ip header exists */
#define     IP_ROUTETOIF            SO_DONTROUTE      /* bypass routing tables */
#define     IP_ALLOWBROADCAST SO_BROADCAST      /* can send broadcast packets */

struct      ipstat      ipstat;
struct      ipq   ipq;              /* ip reass. queue */
u_short     ip_id;                        /* ip packet ctr, for ids */
int   ip_defttl;              /* default IP ttl */

int    in_control __P((struct socket *, n_long, caddr_t, struct ifnet *));
int    ip_ctloutput __P((int, struct socket *, int, int, struct mbuf **));
void   ip_deq __P((struct ipasfrag *));
int    ip_dooptions __P((struct mbuf *));
void   ip_drain __P((void));
void   ip_enq __P((struct ipasfrag *, struct ipasfrag *));
void   ip_forward __P((struct mbuf *, int));
void   ip_freef __P((struct ipq *));
void   ip_freemoptions __P((struct ip_moptions *));
int    ip_getmoptions __P((int, struct ip_moptions *, struct mbuf **));
void   ip_init __P((void));
int    ip_mforward __P((struct mbuf *, struct ifnet *));
int    ip_optcopy __P((struct ip *, struct ip *));
int    ip_output __P((struct mbuf *,
          struct mbuf *, struct route *, int, struct ip_moptions *));
int    ip_pcbopts __P((struct mbuf **, struct mbuf *));
struct ip *
       ip_reass __P((struct ipasfrag *, struct ipq *));
struct in_ifaddr *
       ip_rtaddr __P((struct in_addr));
int    ip_setmoptions __P((int, struct ip_moptions **, struct mbuf *));
void   ip_slowtimo __P((void));
struct mbuf *
       ip_srcroute __P((void));
void   ip_stripoptions __P((struct mbuf *, struct mbuf *));
int    ip_sysctl __P((int *, n_long, void *, size_t *, void *, size_t));
void   ipintr __P((void));
int    rip_ctloutput __P((int, struct socket *, int, int, struct mbuf **));
void   rip_init __P((void));
void   rip_input __P((struct mbuf *));
int    rip_output __P((struct mbuf *, struct socket *, n_long));
int    rip_usrreq __P((struct socket *,
          int, struct mbuf *, struct mbuf *, struct mbuf *));
#endif

Generated by  Doxygen 1.6.0   Back to index