dist/ipf/ipsend/ip_var.h

   1 /*      $NetBSD$        */
   2
   3 /*      @(#)ip_var.h 1.11 88/08/19 SMI; from UCB 7.1 6/5/86     */
   4
   5 /*
   6  * Copyright (c) 1982, 1986 Regents of the University of California.
   7  * All rights reserved.  The Berkeley software License Agreement
   8  * specifies the terms and conditions for redistribution.
   9  */
  10
  11 /*
  12  * Overlay for ip header used by other protocols (tcp, udp).
  13  */
  14
  15 #ifndef _netinet_ip_var_h
  16 #define _netinet_ip_var_h
  17
  18 struct ipovly {
  19         caddr_t ih_next, ih_prev;       /* for protocol sequence q's */
  20         u_char  ih_x1;                  /* (unused) */
  21         u_char  ih_pr;                  /* protocol */
  22         short   ih_len;                 /* protocol length */
  23         struct  in_addr ih_src;         /* source internet address */
  24         struct  in_addr ih_dst;         /* destination internet address */
  25 };
  26
  27 /*
  28  * Ip reassembly queue structure.  Each fragment
  29  * being reassembled is attached to one of these structures.
  30  * They are timed out after ipq_ttl drops to 0, and may also
  31  * be reclaimed if memory becomes tight.
  32  */
  33 struct ipq {
  34         struct  ipq *next,*prev;        /* to other reass headers */
  35         u_char  ipq_ttl;                /* time for reass q to live */
  36         u_char  ipq_p;                  /* protocol of this fragment */
  37         u_short ipq_id;                 /* sequence id for reassembly */
  38         struct  ipasfrag *ipq_next,*ipq_prev;
  39                                         /* to ip headers of fragments */
  40         struct  in_addr ipq_src,ipq_dst;
  41 };
  42
  43 /*
  44  * Ip header, when holding a fragment.
  45  *
  46  * Note: ipf_next must be at same offset as ipq_next above
  47  */
  48 struct  ipasfrag {
  49 #if defined(vax) || defined(i386)
  50         u_char  ip_hl:4,
  51                 ip_v:4;
  52 #endif
  53 #if defined(mc68000) || defined(sparc)
  54         u_char  ip_v:4,
  55                 ip_hl:4;
  56 #endif
  57         u_char  ipf_mff;                /* copied from (ip_off&IP_MF) */
  58         short   ip_len;
  59         u_short ip_id;
  60         short   ip_off;
  61         u_char  ip_ttl;
  62         u_char  ip_p;
  63         u_short ip_sum;
  64         struct  ipasfrag *ipf_next;     /* next fragment */
  65         struct  ipasfrag *ipf_prev;     /* previous fragment */
  66 };
  67
  68 /*
  69  * Structure stored in mbuf in inpcb.ip_options
  70  * and passed to ip_output when ip options are in use.
  71  * The actual length of the options (including ipopt_dst)
  72  * is in m_len.
  73  */
  74 #define MAX_IPOPTLEN    40
  75
  76 struct ipoption {
  77         struct  in_addr ipopt_dst;      /* first-hop dst if source routed */
  78         char    ipopt_list[MAX_IPOPTLEN];       /* options proper */
  79 };
  80
  81 /*
  82  * Structure stored in an mbuf attached to inpcb.ip_moptions and
  83  * passed to ip_output when IP multicast options are in use.
  84  */
  85 struct ip_moptions {
  86         struct  ifnet   *imo_multicast_ifp;  /* ifp for outgoing multicasts */
  87         u_char           imo_multicast_ttl;  /* TTL for outgoing multicasts */
  88         u_char           imo_multicast_loop; /* 1 => hear sends if a member */
  89         u_short          imo_num_memberships;/* no. memberships this socket */
  90         struct in_multi *imo_membership[IP_MAX_MEMBERSHIPS];
  91 #ifdef RSVP_ISI
  92         long             imo_multicast_vif;  /* vif for outgoing multicasts */
  93 #endif /* RSVP_ISI */
  94 };
  95
  96 struct  ipstat {
  97         long    ips_total;              /* total packets received */
  98         long    ips_badsum;             /* checksum bad */
  99         long    ips_tooshort;           /* packet too short */
 100         long    ips_toosmall;           /* not enough data */
 101         long    ips_badhlen;            /* ip header length < data size */
 102         long    ips_badlen;             /* ip length < ip header length */
 103         long    ips_fragments;          /* fragments received */
 104         long    ips_fragdropped;        /* frags dropped (dups, out of space) */
 105         long    ips_fragtimeout;        /* fragments timed out */
 106         long    ips_forward;            /* packets forwarded */
 107         long    ips_cantforward;        /* packets rcvd for unreachable dest */
 108         long    ips_redirectsent;       /* packets forwarded on same net */
 109 };
 110
 111 #ifdef KERNEL
 112 /* flags passed to ip_output as last parameter */
 113 #define IP_FORWARDING           0x1             /* most of ip header exists */
 114 #define IP_MULTICASTOPTS        0x2             /* multicast opts present */
 115 #define IP_ROUTETOIF            SO_DONTROUTE    /* bypass routing tables */
 116 #define IP_ALLOWBROADCAST       SO_BROADCAST    /* can send broadcast packets */
 117
 118 struct  ipstat  ipstat;
 119 struct  ipq     ipq;                    /* ip reass. queue */
 120 u_short ip_id;                          /* ip packet ctr, for ids */
 121
 122 struct  mbuf *ip_srcroute();
 123 #endif
 124
 125 #endif /*!_netinet_ip_var_h*/