usr/src/uts/common/netinet/ip_var.h

   1 /*
   2  * Copyright (c) 1997-2001 by Sun Microsystems, Inc.
   3  * All rights reserved.
   4  */
   5
   6 /*
   7  * Copyright (c) 1982, 1986 Regents of the University of California.
   8  * All rights reserved.  The Berkeley software License Agreement
   9  * specifies the terms and conditions for redistribution.
  10  */
  11
  12 /*
  13  * Overlay for ip header used by other protocols (tcp, udp).
  14  */
  15
  16 #ifndef _NETINET_IP_VAR_H
  17 #define _NETINET_IP_VAR_H
  18
  19 #pragma ident   "%Z%%M% %I%     %E% SMI"
  20 /* ip_var.h 1.11 88/08/19 SMI; from UCB 7.1 6/5/86      */
  21
  22 #include <sys/isa_defs.h>
  23
  24 #ifdef  __cplusplus
  25 extern "C" {
  26 #endif
  27
  28 struct ipovly {
  29 #ifdef _LP64
  30         uint32_t        ih_next, ih_prev;
  31 #else
  32         caddr_t ih_next, ih_prev;       /* for protocol sequence q's */
  33 #endif
  34         uchar_t ih_x1;                  /* (unused) */
  35         uchar_t ih_pr;                  /* protocol */
  36         short   ih_len;                 /* protocol length */
  37         struct  in_addr ih_src;         /* source internet address */
  38         struct  in_addr ih_dst;         /* destination internet address */
  39 };
  40
  41 /*
  42  * Ip reassembly queue structure.  Each fragment
  43  * being reassembled is attached to one of these structures.
  44  * They are timed out after ipq_ttl drops to 0, and may also
  45  * be reclaimed if memory becomes tight.
  46  */
  47 struct ipq {
  48         struct  ipq *next, *prev;       /* to other reass headers */
  49         uchar_t ipq_ttl;                /* time for reass q to live */
  50         uchar_t ipq_p;                  /* protocol of this fragment */
  51         ushort_t ipq_id;                /* sequence id for reassembly */
  52         struct  ipasfrag *ipq_next, *ipq_prev;
  53                                         /* to ip headers of fragments */
  54         struct  in_addr ipq_src, ipq_dst;
  55 };
  56
  57 /*
  58  * Ip header, when holding a fragment.
  59  *
  60  * Note: ipf_next must be at same offset as ipq_next above
  61  */
  62 struct  ipasfrag {
  63 #ifdef _BIT_FIELDS_LTOH
  64         uchar_t ip_hl:4,
  65                 ip_v:4;
  66 #else
  67         uchar_t ip_v:4,
  68                 ip_hl:4;
  69 #endif
  70         uchar_t ipf_mff;                /* copied from (ip_off&IP_MF) */
  71         short   ip_len;
  72         ushort_t ip_id;
  73         short   ip_off;
  74         uchar_t ip_ttl;
  75         uchar_t ip_p;
  76         ushort_t ip_sum;
  77         struct  ipasfrag *ipf_next;     /* next fragment */
  78         struct  ipasfrag *ipf_prev;     /* previous fragment */
  79 };
  80
  81 /*
  82  * Structure stored in mbuf in inpcb.ip_options
  83  * and passed to ip_output when ip options are in use.
  84  * The actual length of the options (including ipopt_dst)
  85  * is in m_len.
  86  */
  87 #define MAX_IPOPTLEN    40
  88
  89 struct ipoption {
  90         struct  in_addr ipopt_dst;      /* first-hop dst if source routed */
  91         char    ipopt_list[MAX_IPOPTLEN];       /* options proper */
  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_ROUTETOIF            SO_DONTROUTE    /* bypass routing tables */
 113 #define IP_ALLOWBROADCAST       SO_BROADCAST    /* can send broadcast packets */
 114 #endif
 115
 116 #ifdef  __cplusplus
 117 }
 118 #endif
 119
 120 #endif  /* _NETINET_IP_VAR_H */