bsd/netinet/ip_var.h

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