bsd/netinet/ip_var.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /*
  23  * Copyright (c) 1982, 1986, 1993
  24  *      The Regents of the University of California.  All rights reserved.
  25  *
  26  * Redistribution and use in source and binary forms, with or without
  27  * modification, are permitted provided that the following conditions
  28  * are met:
  29  * 1. Redistributions of source code must retain the above copyright
  30  *    notice, this list of conditions and the following disclaimer.
  31  * 2. Redistributions in binary form must reproduce the above copyright
  32  *    notice, this list of conditions and the following disclaimer in the
  33  *    documentation and/or other materials provided with the distribution.
  34  * 3. All advertising materials mentioning features or use of this software
  35  *    must display the following acknowledgement:
  36  *      This product includes software developed by the University of
  37  *      California, Berkeley and its contributors.
  38  * 4. Neither the name of the University nor the names of its contributors
  39  *    may be used to endorse or promote products derived from this software
  40  *    without specific prior written permission.
  41  *
  42  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  43  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  44  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  45  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  46  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  47  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  48  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  49  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  50  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  51  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  52  * SUCH DAMAGE.
  53  *
  54  *      @(#)ip_var.h    8.2 (Berkeley) 1/9/95
  55  */
  56
  57 #ifndef _NETINET_IP_VAR_H_
  58 #define _NETINET_IP_VAR_H_
  59
  60 /*
  61  * Overlay for ip header used by other protocols (tcp, udp).
  62  */
  63 struct ipovly {
  64         u_char  ih_x1[9];               /* (unused) */
  65         u_char  ih_pr;                  /* protocol */
  66         u_short ih_len;                 /* protocol length */
  67         struct  in_addr ih_src;         /* source internet address */
  68         struct  in_addr ih_dst;         /* destination internet address */
  69 };
  70
  71 /*
  72  * Ip reassembly queue structure.  Each fragment
  73  * being reassembled is attached to one of these structures.
  74  * They are timed out after ipq_ttl drops to 0, and may also
  75  * be reclaimed if memory becomes tight.
  76  */
  77 struct ipq {
  78         struct  ipq *next,*prev;        /* to other reass headers */
  79         u_char  ipq_ttl;                /* time for reass q to live */
  80         u_char  ipq_p;                  /* protocol of this fragment */
  81         u_short ipq_id;                 /* sequence id for reassembly */
  82         struct mbuf *ipq_frags;         /* to ip headers of fragments */
  83         struct  in_addr ipq_src,ipq_dst;
  84 #if IPDIVERT
  85         u_short ipq_divert;             /* divert protocol port */
  86         u_short ipq_div_cookie;         /* divert protocol cookie */
  87 #endif
  88 };
  89
  90 /*
  91  * Structure stored in mbuf in inpcb.ip_options
  92  * and passed to ip_output when ip options are in use.
  93  * The actual length of the options (including ipopt_dst)
  94  * is in m_len.
  95  */
  96 #define MAX_IPOPTLEN    40
  97
  98 struct ipoption {
  99         struct  in_addr ipopt_dst;      /* first-hop dst if source routed */
 100         char    ipopt_list[MAX_IPOPTLEN];       /* options proper */
 101 };
 102
 103 /*
 104  * Structure attached to inpcb.ip_moptions and
 105  * passed to ip_output when IP multicast options are in use.
 106  */
 107 struct ip_moptions {
 108         struct  ifnet *imo_multicast_ifp; /* ifp for outgoing multicasts */
 109         u_char  imo_multicast_ttl;      /* TTL for outgoing multicasts */
 110         u_char  imo_multicast_loop;     /* 1 => hear sends if a member */
 111         u_short imo_num_memberships;    /* no. memberships this socket */
 112         struct  in_multi *imo_membership[IP_MAX_MEMBERSHIPS];
 113         u_long  imo_multicast_vif;      /* vif num outgoing multicasts */
 114 };
 115
 116 struct  ipstat {
 117         u_long  ips_total;              /* total packets received */
 118         u_long  ips_badsum;             /* checksum bad */
 119         u_long  ips_tooshort;           /* packet too short */
 120         u_long  ips_toosmall;           /* not enough data */
 121         u_long  ips_badhlen;            /* ip header length < data size */
 122         u_long  ips_badlen;             /* ip length < ip header length */
 123         u_long  ips_fragments;          /* fragments received */
 124         u_long  ips_fragdropped;        /* frags dropped (dups, out of space) */
 125         u_long  ips_fragtimeout;        /* fragments timed out */
 126         u_long  ips_forward;            /* packets forwarded */
 127         u_long  ips_fastforward;        /* packets fast forwarded */
 128         u_long  ips_cantforward;        /* packets rcvd for unreachable dest */
 129         u_long  ips_redirectsent;       /* packets forwarded on same net */
 130         u_long  ips_noproto;            /* unknown or unsupported protocol */
 131         u_long  ips_delivered;          /* datagrams delivered to upper level*/
 132         u_long  ips_localout;           /* total ip packets generated here */
 133         u_long  ips_odropped;           /* lost packets due to nobufs, etc. */
 134         u_long  ips_reassembled;        /* total packets reassembled ok */
 135         u_long  ips_fragmented;         /* datagrams successfully fragmented */
 136         u_long  ips_ofragments;         /* output fragments created */
 137         u_long  ips_cantfrag;           /* don't fragment flag was set, etc. */
 138         u_long  ips_badoptions;         /* error in option processing */
 139         u_long  ips_noroute;            /* packets discarded due to no route */
 140         u_long  ips_badvers;            /* ip version != 4 */
 141         u_long  ips_rawout;             /* total raw ip packets generated */
 142         u_long  ips_toolong;            /* ip length > max ip packet size */
 143         u_long  ips_notmember;          /* multicasts for unregistered grps */
 144         u_long  ips_nogif;              /* no match gif found */
 145 };
 146
 147 #if KERNEL
 148
 149 /* flags passed to ip_output as last parameter */
 150 #define IP_FORWARDING           0x1             /* most of ip header exists */
 151 #define IP_RAWOUTPUT            0x2             /* raw ip header exists */
 152 #define IP_ROUTETOIF            SO_DONTROUTE    /* bypass routing tables */
 153 #define IP_ALLOWBROADCAST       SO_BROADCAST    /* can send broadcast packets */
 154
 155 struct ip;
 156 struct inpcb;
 157 struct route;
 158 struct sockopt;
 159
 160 extern struct   ipstat  ipstat;
 161 extern u_short  ip_id;                          /* ip packet ctr, for ids */
 162 extern int      ip_defttl;                      /* default IP ttl */
 163 extern int      ipforwarding;                   /* ip forwarding */
 164 extern struct protosw *ip_protox[];
 165 extern struct socket *ip_rsvpd; /* reservation protocol daemon */
 166 extern struct socket *ip_mrouter; /* multicast routing daemon */
 167 extern int      (*legal_vif_num) __P((int));
 168 extern u_long   (*ip_mcast_src) __P((int));
 169 extern int rsvp_on;
 170 extern struct   pr_usrreqs rip_usrreqs;
 171
 172 int      ip_ctloutput __P((struct socket *, struct sockopt *sopt));
 173 void     ip_drain __P((void));
 174 void     ip_freemoptions __P((struct ip_moptions *));
 175 void     ip_init __P((void));
 176 extern int       (*ip_mforward) __P((struct ip *, struct ifnet *, struct mbuf *,
 177                           struct ip_moptions *));
 178 int      ip_output __P((struct mbuf *,
 179             struct mbuf *, struct route *, int, struct ip_moptions *));
 180 void     ip_savecontrol __P((struct inpcb *, struct mbuf **, struct ip *,
 181                 struct mbuf *));
 182 void     ip_slowtimo __P((void));
 183 struct mbuf *
 184          ip_srcroute __P((void));
 185 void     ip_stripoptions __P((struct mbuf *, struct mbuf *));
 186 int      rip_ctloutput __P((struct socket *, struct sockopt *));
 187 void     rip_ctlinput __P((int, struct sockaddr *, void *));
 188 void     rip_init __P((void));
 189 void     rip_input __P((struct mbuf *, int));
 190 int      rip_output __P((struct mbuf *, struct socket *, u_long));
 191 void    ipip_input __P((struct mbuf *, int));
 192 void    rsvp_input __P((struct mbuf *, int));
 193 int     ip_rsvp_init __P((struct socket *));
 194 int     ip_rsvp_done __P((void));
 195 int     ip_rsvp_vif_init __P((struct socket *, struct sockopt *));
 196 int     ip_rsvp_vif_done __P((struct socket *, struct sockopt *));
 197 void    ip_rsvp_force_done __P((struct socket *));
 198
 199 #if IPDIVERT
 200 void    div_init __P((void));
 201 void    div_input __P((struct mbuf *, int));
 202 extern struct pr_usrreqs div_usrreqs;
 203 extern u_short ip_divert_port;
 204 extern u_short ip_divert_cookie;
 205 #endif
 206
 207 extern struct sockaddr_in *ip_fw_fwd_addr;
 208
 209 #endif /* KERNEL */
 210
 211 #endif /* !_NETINET_IP_VAR_H_ */