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 #include <sys/appleapiopts.h>
  60
  61 /*
  62  * Overlay for ip header used by other protocols (tcp, udp).
  63  */
  64 struct ipovly {
  65         u_char  ih_x1[9];               /* (unused) */
  66         u_char  ih_pr;                  /* protocol */
  67         u_short ih_len;                 /* protocol length */
  68         struct  in_addr ih_src;         /* source internet address */
  69         struct  in_addr ih_dst;         /* destination internet address */
  70 };
  71
  72 #ifdef KERNEL_PRIVATE
  73 /*
  74  * Ip reassembly queue structure.  Each fragment
  75  * being reassembled is attached to one of these structures.
  76  * They are timed out after ipq_ttl drops to 0, and may also
  77  * be reclaimed if memory becomes tight.
  78  */
  79 struct ipq {
  80         struct  ipq *next,*prev;        /* to other reass headers */
  81         u_char  ipq_ttl;                /* time for reass q to live */
  82         u_char  ipq_p;                  /* protocol of this fragment */
  83         u_short ipq_id;                 /* sequence id for reassembly */
  84         struct mbuf *ipq_frags;         /* to ip headers of fragments */
  85         struct  in_addr ipq_src,ipq_dst;
  86         u_long  ipq_nfrags;
  87         TAILQ_ENTRY(ipq) ipq_list;
  88         u_long  reserved[1];            /* for future use */
  89 #if IPDIVERT
  90 #ifdef IPDIVERT_44
  91         u_int32_t ipq_div_info;         /* ipfw divert port & flags */
  92 #else
  93         u_int16_t ipq_divert;           /* ipfw divert port (Maintain backward compat.) */
  94 #endif
  95         u_int16_t ipq_div_cookie;       /* ipfw divert cookie */
  96 #endif
  97 };
  98
  99 /*
 100  * Structure stored in mbuf in inpcb.ip_options
 101  * and passed to ip_output when ip options are in use.
 102  * The actual length of the options (including ipopt_dst)
 103  * is in m_len.
 104  */
 105 #endif /* KERNEL_PRIVATE */
 106 #define MAX_IPOPTLEN    40
 107 #ifdef KERNEL_PRIVATE
 108
 109 struct ipoption {
 110         struct  in_addr ipopt_dst;      /* first-hop dst if source routed */
 111         char    ipopt_list[MAX_IPOPTLEN];       /* options proper */
 112 };
 113
 114 /*
 115  * Structure attached to inpcb.ip_moptions and
 116  * passed to ip_output when IP multicast options are in use.
 117  */
 118 struct ip_moptions {
 119         struct  ifnet *imo_multicast_ifp; /* ifp for outgoing multicasts */
 120         u_char  imo_multicast_ttl;      /* TTL for outgoing multicasts */
 121         u_char  imo_multicast_loop;     /* 1 => hear sends if a member */
 122         u_short imo_num_memberships;    /* no. memberships this socket */
 123         struct  in_multi *imo_membership[IP_MAX_MEMBERSHIPS];
 124         u_long  imo_multicast_vif;      /* vif num outgoing multicasts */
 125         struct  in_addr imo_multicast_addr; /* ifindex/addr on MULTICAST_IF */
 126 };
 127
 128 /* mbuf tag for ip_forwarding info */
 129 struct ip_fwd_tag {
 130         struct sockaddr_in *next_hop;   /* next_hop */
 131 };
 132
 133 #endif /* KERNEL_PRIVATE */
 134
 135 struct  ipstat {
 136         u_long  ips_total;              /* total packets received */
 137         u_long  ips_badsum;             /* checksum bad */
 138         u_long  ips_tooshort;           /* packet too short */
 139         u_long  ips_toosmall;           /* not enough data */
 140         u_long  ips_badhlen;            /* ip header length < data size */
 141         u_long  ips_badlen;             /* ip length < ip header length */
 142         u_long  ips_fragments;          /* fragments received */
 143         u_long  ips_fragdropped;        /* frags dropped (dups, out of space) */
 144         u_long  ips_fragtimeout;        /* fragments timed out */
 145         u_long  ips_forward;            /* packets forwarded */
 146         u_long  ips_fastforward;        /* packets fast forwarded */
 147         u_long  ips_cantforward;        /* packets rcvd for unreachable dest */
 148         u_long  ips_redirectsent;       /* packets forwarded on same net */
 149         u_long  ips_noproto;            /* unknown or unsupported protocol */
 150         u_long  ips_delivered;          /* datagrams delivered to upper level*/
 151         u_long  ips_localout;           /* total ip packets generated here */
 152         u_long  ips_odropped;           /* lost packets due to nobufs, etc. */
 153         u_long  ips_reassembled;        /* total packets reassembled ok */
 154         u_long  ips_fragmented;         /* datagrams successfully fragmented */
 155         u_long  ips_ofragments;         /* output fragments created */
 156         u_long  ips_cantfrag;           /* don't fragment flag was set, etc. */
 157         u_long  ips_badoptions;         /* error in option processing */
 158         u_long  ips_noroute;            /* packets discarded due to no route */
 159         u_long  ips_badvers;            /* ip version != 4 */
 160         u_long  ips_rawout;             /* total raw ip packets generated */
 161         u_long  ips_toolong;            /* ip length > max ip packet size */
 162         u_long  ips_notmember;          /* multicasts for unregistered grps */
 163         u_long  ips_nogif;              /* no match gif found */
 164         u_long  ips_badaddr;            /* invalid address on header */
 165 };
 166
 167 struct ip_linklocal_stat {
 168         u_long iplls_in_total;
 169         u_long iplls_in_badttl;
 170         u_long iplls_out_total;
 171         u_long iplls_out_badttl;
 172 };
 173
 174 #ifdef KERNEL_PRIVATE
 175 /* flags passed to ip_output as last parameter */
 176 #define IP_FORWARDING           0x1             /* most of ip header exists */
 177 #define IP_RAWOUTPUT            0x2             /* raw ip header exists */
 178 #define IP_NOIPSEC                      0x4             /* No IPSec processing */
 179 #define IP_ROUTETOIF            SO_DONTROUTE    /* bypass routing tables (0x0010) */
 180 #define IP_ALLOWBROADCAST       SO_BROADCAST    /* can send broadcast packets (0x0020) */
 181
 182 struct ip;
 183 struct inpcb;
 184 struct route;
 185 struct sockopt;
 186
 187 extern struct   ipstat  ipstat;
 188 #if !defined(RANDOM_IP_ID) || RANDOM_IP_ID == 0
 189 extern u_short  ip_id;                          /* ip packet ctr, for ids */
 190 #endif
 191 extern int      ip_defttl;                      /* default IP ttl */
 192 extern int      ipforwarding;                   /* ip forwarding */
 193 extern struct protosw *ip_protox[];
 194 extern struct socket *ip_rsvpd; /* reservation protocol daemon */
 195 extern struct socket *ip_mrouter; /* multicast routing daemon */
 196 extern int      (*legal_vif_num)(int);
 197 extern u_long   (*ip_mcast_src)(int);
 198 extern int rsvp_on;
 199 extern struct   pr_usrreqs rip_usrreqs;
 200
 201 int      ip_ctloutput(struct socket *, struct sockopt *sopt);
 202 void     ip_drain(void);
 203 void     ip_freemoptions(struct ip_moptions *);
 204 void     ip_init(void);
 205 extern int       (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *,
 206                           struct ip_moptions *);
 207 int      ip_output(struct mbuf *,
 208             struct mbuf *, struct route *, int, struct ip_moptions *);
 209 int      ip_output_list(struct mbuf *, int,
 210             struct mbuf *, struct route *, int, struct ip_moptions *);
 211 struct in_ifaddr *
 212          ip_rtaddr(struct in_addr, struct route *);
 213 void     ip_savecontrol(struct inpcb *, struct mbuf **, struct ip *,
 214                 struct mbuf *);
 215 void     ip_slowtimo(void);
 216 struct mbuf *
 217          ip_srcroute(void);
 218 void     ip_stripoptions(struct mbuf *, struct mbuf *);
 219 #if RANDOM_IP_ID
 220 u_int16_t
 221          ip_randomid(void);
 222 #endif
 223 int     rip_ctloutput(struct socket *, struct sockopt *);
 224 void    rip_ctlinput(int, struct sockaddr *, void *);
 225 void    rip_init(void);
 226 void    rip_input(struct mbuf *, int);
 227 int     rip_output(struct mbuf *, struct socket *, u_long);
 228 int     rip_unlock(struct socket *, int, int);
 229 void    ipip_input(struct mbuf *, int);
 230 void    rsvp_input(struct mbuf *, int);
 231 int     ip_rsvp_init(struct socket *);
 232 int     ip_rsvp_done(void);
 233 int     ip_rsvp_vif_init(struct socket *, struct sockopt *);
 234 int     ip_rsvp_vif_done(struct socket *, struct sockopt *);
 235 void    ip_rsvp_force_done(struct socket *);
 236
 237 void    in_delayed_cksum(struct mbuf *m);
 238
 239 #endif KERNEL_PRIVATE
 240 #endif !_NETINET_IP_VAR_H_