contrib/ipfilter/ipsend/ip_var.h

   1 /*      @(#)ip_var.h 1.11 88/08/19 SMI; from UCB 7.1 6/5/86     */
   2
   3 /*
   4  * Copyright (c) 1982, 1986 Regents of the University of California.
   5  * All rights reserved.  The Berkeley software License Agreement
   6  * specifies the terms and conditions for redistribution.
   7  */
   8
   9 /*
  10  * Overlay for ip header used by other protocols (tcp, udp).
  11  */
  12
  13 #ifndef _netinet_ip_var_h
  14 #define _netinet_ip_var_h
  15
  16 struct ipovly {
  17         caddr_t ih_next, ih_prev;       /* for protocol sequence q's */
  18         u_char  ih_x1;                  /* (unused) */
  19         u_char  ih_pr;                  /* protocol */
  20         short   ih_len;                 /* protocol length */
  21         struct  in_addr ih_src;         /* source internet address */
  22         struct  in_addr ih_dst;         /* destination internet address */
  23 };
  24
  25 /*
  26  * Ip reassembly queue structure.  Each fragment
  27  * being reassembled is attached to one of these structures.
  28  * They are timed out after ipq_ttl drops to 0, and may also
  29  * be reclaimed if memory becomes tight.
  30  */
  31 struct ipq {
  32         struct  ipq *next,*prev;        /* to other reass headers */
  33         u_char  ipq_ttl;                /* time for reass q to live */
  34         u_char  ipq_p;                  /* protocol of this fragment */
  35         u_short ipq_id;                 /* sequence id for reassembly */
  36         struct  ipasfrag *ipq_next,*ipq_prev;
  37                                         /* to ip headers of fragments */
  38         struct  in_addr ipq_src,ipq_dst;
  39 };
  40
  41 /*
  42  * Ip header, when holding a fragment.
  43  *
  44  * Note: ipf_next must be at same offset as ipq_next above
  45  */
  46 struct  ipasfrag {
  47 #if defined(vax) || defined(i386) || defined(__i386__)
  48         u_char  ip_hl:4,
  49                 ip_v:4;
  50 #endif
  51 #if defined(mc68000) || defined(sparc)
  52         u_char  ip_v:4,
  53                 ip_hl:4;
  54 #endif
  55         u_char  ipf_mff;                /* copied from (ip_off&IP_MF) */
  56         short   ip_len;
  57         u_short ip_id;
  58         short   ip_off;
  59         u_char  ip_ttl;
  60         u_char  ip_p;
  61         u_short ip_sum;
  62         struct  ipasfrag *ipf_next;     /* next fragment */
  63         struct  ipasfrag *ipf_prev;     /* previous fragment */
  64 };
  65
  66 /*
  67  * Structure stored in mbuf in inpcb.ip_options
  68  * and passed to ip_output when ip options are in use.
  69  * The actual length of the options (including ipopt_dst)
  70  * is in m_len.
  71  */
  72 #define MAX_IPOPTLEN    40
  73
  74 struct ipoption {
  75         struct  in_addr ipopt_dst;      /* first-hop dst if source routed */
  76         char    ipopt_list[MAX_IPOPTLEN];       /* options proper */
  77 };
  78
  79 /*
  80  * Structure stored in an mbuf attached to inpcb.ip_moptions and
  81  * passed to ip_output when IP multicast options are in use.
  82  */
  83 struct ip_moptions {
  84         struct  ifnet   *imo_multicast_ifp;  /* ifp for outgoing multicasts */
  85         u_char           imo_multicast_ttl;  /* TTL for outgoing multicasts */
  86         u_char           imo_multicast_loop; /* 1 => hear sends if a member */
  87         u_short          imo_num_memberships;/* no. memberships this socket */
  88         struct in_multi *imo_membership[IP_MAX_MEMBERSHIPS];
  89 #ifdef RSVP_ISI
  90         long             imo_multicast_vif;  /* vif for outgoing multicasts */
  91 #endif /* RSVP_ISI */
  92 };
  93
  94 struct  ipstat {
  95         long    ips_total;              /* total packets received */
  96         long    ips_badsum;             /* checksum bad */
  97         long    ips_tooshort;           /* packet too short */
  98         long    ips_toosmall;           /* not enough data */
  99         long    ips_badhlen;            /* ip header length < data size */
 100         long    ips_badlen;             /* ip length < ip header length */
 101         long    ips_fragments;          /* fragments received */
 102         long    ips_fragdropped;        /* frags dropped (dups, out of space) */
 103         long    ips_fragtimeout;        /* fragments timed out */
 104         long    ips_forward;            /* packets forwarded */
 105         long    ips_cantforward;        /* packets rcvd for unreachable dest */
 106         long    ips_redirectsent;       /* packets forwarded on same net */
 107 };
 108
 109 #ifdef KERNEL
 110 /* flags passed to ip_output as last parameter */
 111 #define IP_FORWARDING           0x1             /* most of ip header exists */
 112 #define IP_MULTICASTOPTS        0x2             /* multicast opts present */
 113 #define IP_ROUTETOIF            SO_DONTROUTE    /* bypass routing tables */
 114 #define IP_ALLOWBROADCAST       SO_BROADCAST    /* can send broadcast packets */
 115
 116 struct  ipstat  ipstat;
 117 struct  ipq     ipq;                    /* ip reass. queue */
 118 u_short ip_id;                          /* ip packet ctr, for ids */
 119
 120 struct  mbuf *ip_srcroute();
 121 #endif
 122
 123 #endif /*!_netinet_ip_var_h*/