2.11BSD#431 - /usr/src/sys/netinet/ip_var.h

   1: /*
   2:  * Copyright (c) 1982, 1986 Regents of the University of California.
   3:  * All rights reserved.
   4:  *
   5:  * Redistribution and use in source and binary forms are permitted
   6:  * provided that this notice is preserved and that due credit is given
   7:  * to the University of California at Berkeley. The name of the University
   8:  * may not be used to endorse or promote products derived from this
   9:  * software without specific prior written permission. This software
  10:  * is provided ``as is'' without express or implied warranty.
  11:  *
  12:  *	@(#)ip_var.h	7.4.1 (2.11BSD GTE) 12/31/93
  13:  */
  14: 
  15: /*
  16:  * Overlay for ip header used by other protocols (tcp, udp).
  17:  */
  18: struct ipovly {
  19:     caddr_t ih_next, ih_prev;   /* for protocol sequence q's */
  20: #ifdef pdp11
  21:     u_long  ih_pad;
  22: #endif
  23:     u_char  ih_x1;          /* (unused) */
  24:     u_char  ih_pr;          /* protocol */
  25:     short   ih_len;         /* protocol length */
  26:     struct  in_addr ih_src;     /* source internet address */
  27:     struct  in_addr ih_dst;     /* destination internet address */
  28: };
  29: 
  30: /*
  31:  * Ip reassembly queue structure.  Each fragment
  32:  * being reassembled is attached to one of these structures.
  33:  * They are timed out after ipq_ttl drops to 0, and may also
  34:  * be reclaimed if memory becomes tight.
  35:  */
  36: struct ipq {
  37:     struct  ipq *next,*prev;    /* to other reass headers */
  38: #ifdef pdp11
  39:     u_long  ipq_pad;
  40: #endif
  41:     u_char  ipq_ttl;        /* time for reass q to live */
  42:     u_char  ipq_p;          /* protocol of this fragment */
  43:     u_short ipq_id;         /* sequence id for reassembly */
  44:     struct  ipasfrag *ipq_next,*ipq_prev;
  45:                     /* to ip headers of fragments */
  46:     struct  in_addr ipq_src,ipq_dst;
  47: };
  48: 
  49: /*
  50:  * Ip header, when holding a fragment.
  51:  *
  52:  * Note: ipf_next must be at same offset as ipq_next above
  53:  */
  54: struct  ipasfrag {
  55: #if BYTE_ORDER == LITTLE_ENDIAN
  56:     u_char  ip_hl:4,
  57:         ip_v:4;
  58: #endif
  59: #if BYTE_ORDER == BIG_ENDIAN
  60:     u_char  ip_v:4,
  61:         ip_hl:4;
  62: #endif
  63: #if BYTE_ORDER == PDP_ENDIAN
  64:     u_int   ip_hl:4,
  65:         ip_v:4;
  66: #endif
  67:     u_char  ipf_mff;        /* copied from (ip_off&IP_MF) */
  68:     short   ip_len;
  69:     u_short ip_id;
  70:     short   ip_off;
  71:     u_char  ip_ttl;
  72:     u_char  ip_p;
  73:     u_short ip_sum;
  74:     struct  ipasfrag *ipf_next; /* next fragment */
  75:     struct  ipasfrag *ipf_prev; /* previous fragment */
  76: #ifdef pdp11
  77:     u_long  ipf_pad;
  78: #endif
  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 SUPERVISOR
 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: 
 115: struct  ipstat  ipstat;
 116: struct  ipq ipq;            /* ip reass. queue */
 117: u_short ip_id;              /* ip packet ctr, for ids */
 118: int ip_defttl;          /* default IP ttl */
 119: 
 120: struct  mbuf *ip_srcroute();
 121: #endif

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