bsd/netinet/ip_var.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*
  26  * Copyright (c) 1982, 1986, 1993
  27  *      The Regents of the University of California.  All rights reserved.
  28  *
  29  * Redistribution and use in source and binary forms, with or without
  30  * modification, are permitted provided that the following conditions
  31  * are met:
  32  * 1. Redistributions of source code must retain the above copyright
  33  *    notice, this list of conditions and the following disclaimer.
  34  * 2. Redistributions in binary form must reproduce the above copyright
  35  *    notice, this list of conditions and the following disclaimer in the
  36  *    documentation and/or other materials provided with the distribution.
  37  * 3. All advertising materials mentioning features or use of this software
  38  *    must display the following acknowledgement:
  39  *      This product includes software developed by the University of
  40  *      California, Berkeley and its contributors.
  41  * 4. Neither the name of the University nor the names of its contributors
  42  *    may be used to endorse or promote products derived from this software
  43  *    without specific prior written permission.
  44  *
  45  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  46  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  47  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  48  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  49  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  50  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  51  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  52  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  53  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  54  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  55  * SUCH DAMAGE.
  56  *
  57  *      @(#)ip_var.h    8.2 (Berkeley) 1/9/95
  58  */
  59
  60 #ifndef _NETINET_IP_VAR_H_
  61 #define _NETINET_IP_VAR_H_
  62 #include <sys/appleapiopts.h>
  63
  64 #ifdef __APPLE_API_PRIVATE
  65 /*
  66  * Overlay for ip header used by other protocols (tcp, udp).
  67  */
  68 struct ipovly {
  69         u_char  ih_x1[9];               /* (unused) */
  70         u_char  ih_pr;                  /* protocol */
  71         u_short ih_len;                 /* protocol length */
  72         struct  in_addr ih_src;         /* source internet address */
  73         struct  in_addr ih_dst;         /* destination internet address */
  74 };
  75
  76 /*
  77  * Ip reassembly queue structure.  Each fragment
  78  * being reassembled is attached to one of these structures.
  79  * They are timed out after ipq_ttl drops to 0, and may also
  80  * be reclaimed if memory becomes tight.
  81  */
  82 struct ipq {
  83         struct  ipq *next,*prev;        /* to other reass headers */
  84         u_char  ipq_ttl;                /* time for reass q to live */
  85         u_char  ipq_p;                  /* protocol of this fragment */
  86         u_short ipq_id;                 /* sequence id for reassembly */
  87         struct mbuf *ipq_frags;         /* to ip headers of fragments */
  88         struct  in_addr ipq_src,ipq_dst;
  89         u_long  reserved[4];            /* for future use */
  90 #if IPDIVERT
  91 #ifdef IPDIVERT_44
  92         u_int32_t ipq_div_info;         /* ipfw divert port & flags */
  93 #else
  94         u_int16_t ipq_divert;           /* ipfw divert port (Maintain backward compat.) */
  95 #endif
  96         u_int16_t ipq_div_cookie;       /* ipfw divert cookie */
  97 #endif
  98 };
  99
 100 /*
 101  * Structure stored in mbuf in inpcb.ip_options
 102  * and passed to ip_output when ip options are in use.
 103  * The actual length of the options (including ipopt_dst)
 104  * is in m_len.
 105  */
 106 #define MAX_IPOPTLEN    40
 107
 108 struct ipoption {
 109         struct  in_addr ipopt_dst;      /* first-hop dst if source routed */
 110         char    ipopt_list[MAX_IPOPTLEN];       /* options proper */
 111 };
 112
 113 /*
 114  * Structure attached to inpcb.ip_moptions and
 115  * passed to ip_output when IP multicast options are in use.
 116  */
 117 struct ip_moptions {
 118         struct  ifnet *imo_multicast_ifp; /* ifp for outgoing multicasts */
 119         u_char  imo_multicast_ttl;      /* TTL for outgoing multicasts */
 120         u_char  imo_multicast_loop;     /* 1 => hear sends if a member */
 121         u_short imo_num_memberships;    /* no. memberships this socket */
 122         struct  in_multi *imo_membership[IP_MAX_MEMBERSHIPS];
 123         u_long  imo_multicast_vif;      /* vif num outgoing multicasts */
 124         struct  in_addr imo_multicast_addr; /* ifindex/addr on MULTICAST_IF */
 125 };
 126 #endif /* __APPLE_API_PRIVATE */
 127
 128 #ifdef __APPLE_API_UNSTABLE
 129 struct  ipstat {
 130         u_long  ips_total;              /* total packets received */
 131         u_long  ips_badsum;             /* checksum bad */
 132         u_long  ips_tooshort;           /* packet too short */
 133         u_long  ips_toosmall;           /* not enough data */
 134         u_long  ips_badhlen;            /* ip header length < data size */
 135         u_long  ips_badlen;             /* ip length < ip header length */
 136         u_long  ips_fragments;          /* fragments received */
 137         u_long  ips_fragdropped;        /* frags dropped (dups, out of space) */
 138         u_long  ips_fragtimeout;        /* fragments timed out */
 139         u_long  ips_forward;            /* packets forwarded */
 140         u_long  ips_fastforward;        /* packets fast forwarded */
 141         u_long  ips_cantforward;        /* packets rcvd for unreachable dest */
 142         u_long  ips_redirectsent;       /* packets forwarded on same net */
 143         u_long  ips_noproto;            /* unknown or unsupported protocol */
 144         u_long  ips_delivered;          /* datagrams delivered to upper level*/
 145         u_long  ips_localout;           /* total ip packets generated here */
 146         u_long  ips_odropped;           /* lost packets due to nobufs, etc. */
 147         u_long  ips_reassembled;        /* total packets reassembled ok */
 148         u_long  ips_fragmented;         /* datagrams successfully fragmented */
 149         u_long  ips_ofragments;         /* output fragments created */
 150         u_long  ips_cantfrag;           /* don't fragment flag was set, etc. */
 151         u_long  ips_badoptions;         /* error in option processing */
 152         u_long  ips_noroute;            /* packets discarded due to no route */
 153         u_long  ips_badvers;            /* ip version != 4 */
 154         u_long  ips_rawout;             /* total raw ip packets generated */
 155         u_long  ips_toolong;            /* ip length > max ip packet size */
 156         u_long  ips_notmember;          /* multicasts for unregistered grps */
 157         u_long  ips_nogif;              /* no match gif found */
 158         u_long  ips_badaddr;            /* invalid address on header */
 159 };
 160 #endif /* __APPLE_API_UNSTABLE */
 161
 162 #ifdef __APPLE_API_PRIVATE
 163 #ifdef KERNEL
 164
 165 struct ip_linklocal_stat {
 166         u_long iplls_in_total;
 167         u_long iplls_in_badttl;
 168         u_long iplls_out_total;
 169         u_long iplls_out_badttl;
 170 };
 171
 172 /* flags passed to ip_output as last parameter */
 173 #define IP_FORWARDING           0x1             /* most of ip header exists */
 174 #define IP_RAWOUTPUT            0x2             /* raw ip header exists */
 175 #define IP_NOIPSEC                      0x4             /* No IPSec processing */
 176 #define IP_ROUTETOIF            SO_DONTROUTE    /* bypass routing tables (0x0010) */
 177 #define IP_ALLOWBROADCAST       SO_BROADCAST    /* can send broadcast packets (0x0020) */
 178
 179 struct ip;
 180 struct inpcb;
 181 struct route;
 182 struct sockopt;
 183
 184 extern struct   ipstat  ipstat;
 185 #if !defined(RANDOM_IP_ID) || RANDOM_IP_ID == 0
 186 extern u_short  ip_id;                          /* ip packet ctr, for ids */
 187 #endif
 188 extern int      ip_defttl;                      /* default IP ttl */
 189 extern int      ipforwarding;                   /* ip forwarding */
 190 extern struct protosw *ip_protox[];
 191 extern struct socket *ip_rsvpd; /* reservation protocol daemon */
 192 extern struct socket *ip_mrouter; /* multicast routing daemon */
 193 extern int      (*legal_vif_num) __P((int));
 194 extern u_long   (*ip_mcast_src) __P((int));
 195 extern int rsvp_on;
 196 extern struct   pr_usrreqs rip_usrreqs;
 197
 198 int      ip_ctloutput __P((struct socket *, struct sockopt *sopt));
 199 void     ip_drain __P((void));
 200 void     ip_freemoptions __P((struct ip_moptions *));
 201 void     ip_init __P((void));
 202 extern int       (*ip_mforward) __P((struct ip *, struct ifnet *, struct mbuf *,
 203                           struct ip_moptions *));
 204 int      ip_output __P((struct mbuf *,
 205             struct mbuf *, struct route *, int, struct ip_moptions *));
 206 void     ip_savecontrol __P((struct inpcb *, struct mbuf **, struct ip *,
 207                 struct mbuf *));
 208 void     ip_slowtimo __P((void));
 209 struct mbuf *
 210          ip_srcroute __P((void));
 211 void     ip_stripoptions __P((struct mbuf *, struct mbuf *));
 212 #if RANDOM_IP_ID
 213 u_int16_t
 214          ip_randomid __P((void));
 215 #endif
 216 int      rip_ctloutput __P((struct socket *, struct sockopt *));
 217 void     rip_ctlinput __P((int, struct sockaddr *, void *));
 218 void     rip_init __P((void));
 219 void     rip_input __P((struct mbuf *, int));
 220 int      rip_output __P((struct mbuf *, struct socket *, u_long));
 221 void    ipip_input __P((struct mbuf *, int));
 222 void    rsvp_input __P((struct mbuf *, int));
 223 int     ip_rsvp_init __P((struct socket *));
 224 int     ip_rsvp_done __P((void));
 225 int     ip_rsvp_vif_init __P((struct socket *, struct sockopt *));
 226 int     ip_rsvp_vif_done __P((struct socket *, struct sockopt *));
 227 void    ip_rsvp_force_done __P((struct socket *));
 228
 229 #if IPDIVERT
 230 void    div_init __P((void));
 231 void    div_input __P((struct mbuf *, int));
 232 void    divert_packet __P((struct mbuf *, int, int));
 233 extern struct pr_usrreqs div_usrreqs;
 234 extern u_int16_t ip_divert_cookie;
 235 #endif
 236
 237 extern struct sockaddr_in *ip_fw_fwd_addr;
 238
 239 void    in_delayed_cksum(struct mbuf *m);
 240
 241 #endif /* _KERNEL */
 242 #endif /* __APPLE_API_PRIVATE */
 243
 244 #endif /* !_NETINET_IP_VAR_H_ */