reactos/drivers/lib/oskittcp/include/freebsd/src/sys/netinet/ip_var.h

   1 /*
   2  * Copyright (c) 1982, 1986, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  *      @(#)ip_var.h    8.1 (Berkeley) 6/10/93
  34  */
  35
  36 #ifndef _NETINET_IP_VAR_H_
  37 #define _NETINET_IP_VAR_H_
  38
  39 /*
  40  * Overlay for ip header used by other protocols (tcp, udp).
  41  */
  42 struct ipovly {
  43         caddr_t ih_next, ih_prev;       /* for protocol sequence q's */
  44         u_char  ih_x1;                  /* (unused) */
  45         u_char  ih_pr;                  /* protocol */
  46         short   ih_len;                 /* protocol length */
  47         struct  in_addr ih_src;         /* source internet address */
  48         struct  in_addr ih_dst;         /* destination internet address */
  49 };
  50
  51 /*
  52  * Ip reassembly queue structure.  Each fragment
  53  * being reassembled is attached to one of these structures.
  54  * They are timed out after ipq_ttl drops to 0, and may also
  55  * be reclaimed if memory becomes tight.
  56  */
  57 struct ipq {
  58         struct  ipq *next,*prev;        /* to other reass headers */
  59         u_char  ipq_ttl;                /* time for reass q to live */
  60         u_char  ipq_p;                  /* protocol of this fragment */
  61         u_short ipq_id;                 /* sequence id for reassembly */
  62         struct  ipasfrag *ipq_next,*ipq_prev;
  63                                         /* to ip headers of fragments */
  64         struct  in_addr ipq_src,ipq_dst;
  65 };
  66
  67 /*
  68  * Ip header, when holding a fragment.
  69  *
  70  * Note: ipf_next must be at same offset as ipq_next above
  71  */
  72 struct  ipasfrag {
  73 #if BYTE_ORDER == LITTLE_ENDIAN
  74         u_char  ip_hl:4,
  75                 ip_v:4;
  76 #endif
  77 #if BYTE_ORDER == BIG_ENDIAN
  78         u_char  ip_v:4,
  79                 ip_hl:4;
  80 #endif
  81         u_char  ipf_mff;                /* XXX overlays ip_tos: use low bit
  82                                          * to avoid destroying tos;
  83                                          * copied from (ip_off&IP_MF) */
  84         short   ip_len;
  85         u_short ip_id;
  86         short   ip_off;
  87         u_char  ip_ttl;
  88         u_char  ip_p;
  89         u_short ip_sum;
  90         struct  ipasfrag *ipf_next;     /* next fragment */
  91         struct  ipasfrag *ipf_prev;     /* previous fragment */
  92 };
  93
  94 /*
  95  * Structure stored in mbuf in inpcb.ip_options
  96  * and passed to ip_output when ip options are in use.
  97  * The actual length of the options (including ipopt_dst)
  98  * is in m_len.
  99  */
 100 #define MAX_IPOPTLEN    40
 101
 102 struct ipoption {
 103         struct  in_addr ipopt_dst;      /* first-hop dst if source routed */
 104         char    ipopt_list[MAX_IPOPTLEN];       /* options proper */
 105 };
 106
 107 /*
 108  * Structure attached to inpcb.ip_moptions and
 109  * passed to ip_output when IP multicast options are in use.
 110  */
 111 struct ip_moptions {
 112         struct  ifnet *imo_multicast_ifp; /* ifp for outgoing multicasts */
 113         u_char  imo_multicast_ttl;      /* TTL for outgoing multicasts */
 114         u_char  imo_multicast_loop;     /* 1 => hear sends if a member */
 115         u_short imo_num_memberships;    /* no. memberships this socket */
 116         struct  in_multi *imo_membership[IP_MAX_MEMBERSHIPS];
 117         u_long  imo_multicast_vif;      /* vif num outgoing multicasts */
 118 };
 119
 120 struct  ipstat {
 121         u_long  ips_total;              /* total packets received */
 122         u_long  ips_badsum;             /* checksum bad */
 123         u_long  ips_tooshort;           /* packet too short */
 124         u_long  ips_toosmall;           /* not enough data */
 125         u_long  ips_badhlen;            /* ip header length < data size */
 126         u_long  ips_badlen;             /* ip length < ip header length */
 127         u_long  ips_fragments;          /* fragments received */
 128         u_long  ips_fragdropped;        /* frags dropped (dups, out of space) */
 129         u_long  ips_fragtimeout;        /* fragments timed out */
 130         u_long  ips_forward;            /* packets forwarded */
 131         u_long  ips_cantforward;        /* packets rcvd for unreachable dest */
 132         u_long  ips_redirectsent;       /* packets forwarded on same net */
 133         u_long  ips_noproto;            /* unknown or unsupported protocol */
 134         u_long  ips_delivered;          /* datagrams delivered to upper level*/
 135         u_long  ips_localout;           /* total ip packets generated here */
 136         u_long  ips_odropped;           /* lost packets due to nobufs, etc. */
 137         u_long  ips_reassembled;        /* total packets reassembled ok */
 138         u_long  ips_fragmented;         /* datagrams sucessfully fragmented */
 139         u_long  ips_ofragments;         /* output fragments created */
 140         u_long  ips_cantfrag;           /* don't fragment flag was set, etc. */
 141         u_long  ips_badoptions;         /* error in option processing */
 142         u_long  ips_noroute;            /* packets discarded due to no route */
 143         u_long  ips_badvers;            /* ip version != 4 */
 144         u_long  ips_rawout;             /* total raw ip packets generated */
 145 };
 146
 147 #ifdef KERNEL
 148 /* flags passed to ip_output as last parameter */
 149 #define IP_FORWARDING           0x1             /* most of ip header exists */
 150 #define IP_RAWOUTPUT            0x2             /* raw ip header exists */
 151 #define IP_ROUTETOIF            SO_DONTROUTE    /* bypass routing tables */
 152 #define IP_ALLOWBROADCAST       SO_BROADCAST    /* can send broadcast packets */
 153
 154 extern struct   ipstat  ipstat;
 155 extern struct   ipq     ipq;                    /* ip reass. queue */
 156 extern u_short  ip_id;                          /* ip packet ctr, for ids */
 157 extern int      ip_defttl;                      /* default IP ttl */
 158 extern u_char   ip_protox[];
 159 extern struct socket *ip_rsvpd; /* reservation protocol daemon */
 160 extern struct socket *ip_mrouter; /* multicast routing daemon */
 161 extern int      (*legal_vif_num) __P((int));
 162 extern u_long   (*ip_mcast_src) __P((int));
 163 extern int rsvp_on;
 164
 165 int      ip_ctloutput __P((int, struct socket *, int, int, struct mbuf **));
 166 void     ip_deq __P((struct ipasfrag *));
 167 int      ip_dooptions __P((struct mbuf *));
 168 void     ip_drain __P((void));
 169 void     ip_enq __P((struct ipasfrag *, struct ipasfrag *));
 170 void     ip_forward __P((struct mbuf *, int));
 171 void     ip_freef __P((struct ipq *));
 172 void     ip_freemoptions __P((struct ip_moptions *));
 173 int      ip_getmoptions __P((int, struct ip_moptions *, struct mbuf **));
 174 void     ip_init __P((void));
 175 extern int       (*ip_mforward) __P((struct ip *, struct ifnet *, struct mbuf *,
 176                           struct ip_moptions *));
 177 int      ip_next_mtu __P((int, int));
 178 int      ip_optcopy __P((struct ip *, struct ip *));
 179 int      ip_output __P((struct mbuf *, struct mbuf *, struct route *, int,
 180                         struct ip_moptions *));
 181 int      ip_pcbopts __P((struct mbuf **, struct mbuf *));
 182 struct ip *
 183          ip_reass __P((struct ipasfrag *, struct ipq *));
 184 struct in_ifaddr *
 185          ip_rtaddr __P((struct in_addr));
 186 int      ip_setmoptions __P((int, struct ip_moptions **, struct mbuf *));
 187 void     ip_slowtimo __P((void));
 188 struct mbuf *
 189          ip_srcroute __P((void));
 190 void     ip_stripoptions __P((struct mbuf *, struct mbuf *));
 191 int      ip_sysctl __P((int *, u_int, void *, size_t *, void *, size_t));
 192 void     ipintr __P((void));
 193 int      rip_ctloutput __P((int, struct socket *, int, int, struct mbuf **));
 194 void     rip_init __P((void));
 195 void     rip_input __P((struct mbuf *));
 196 int      rip_output __P((struct mbuf *, struct socket *, u_long));
 197 int      rip_usrreq __P((struct socket *,
 198             int, struct mbuf *, struct mbuf *, struct mbuf *));
 199 int     ip_rsvp_init __P((struct socket *));
 200 int     ip_rsvp_done __P((void));
 201 int     ip_rsvp_vif_init __P((struct socket *, struct mbuf *));
 202 int     ip_rsvp_vif_done __P((struct socket *, struct mbuf *));
 203 void    ip_rsvp_force_done __P((struct socket *));
 204
 205 void  rip_ip_input __P((struct mbuf *mm,
 206           register struct socket *ip_mrouter, struct sockaddr *src));
 207
 208 #endif
 209
 210 #endif