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1c79356b 1/*
5d5c5d0d
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2 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
3 *
8f6c56a5 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
1c79356b 5 *
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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
8ad349bb 24 * limitations under the License.
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25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
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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_
9bccf70c 65#include <sys/appleapiopts.h>
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66
67/*
68 * Overlay for ip header used by other protocols (tcp, udp).
69 */
70struct 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
91447636 78#ifdef KERNEL_PRIVATE
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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 */
85struct 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;
483a1d10 92 u_long ipq_nfrags;
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93 TAILQ_ENTRY(ipq) ipq_list;
94 u_long reserved[1]; /* for future use */
1c79356b 95#if IPDIVERT
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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 */
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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 */
91447636 111#endif /* KERNEL_PRIVATE */
1c79356b 112#define MAX_IPOPTLEN 40
91447636 113#ifdef KERNEL_PRIVATE
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114
115struct 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 */
124struct 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 */
9bccf70c 131 struct in_addr imo_multicast_addr; /* ifindex/addr on MULTICAST_IF */
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132};
133
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134/* mbuf tag for ip_forwarding info */
135struct ip_fwd_tag {
136 struct sockaddr_in *next_hop; /* next_hop */
137};
138
139#endif /* KERNEL_PRIVATE */
140
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141struct 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 */
9bccf70c 170 u_long ips_badaddr; /* invalid address on header */
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171};
172
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173struct 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};
1c79356b 179
91447636 180#ifdef KERNEL_PRIVATE
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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 */
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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) */
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187
188struct ip;
189struct inpcb;
190struct route;
191struct sockopt;
192
193extern struct ipstat ipstat;
9bccf70c 194#if !defined(RANDOM_IP_ID) || RANDOM_IP_ID == 0
1c79356b 195extern u_short ip_id; /* ip packet ctr, for ids */
9bccf70c 196#endif
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197extern int ip_defttl; /* default IP ttl */
198extern int ipforwarding; /* ip forwarding */
199extern struct protosw *ip_protox[];
200extern struct socket *ip_rsvpd; /* reservation protocol daemon */
201extern struct socket *ip_mrouter; /* multicast routing daemon */
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202extern int (*legal_vif_num)(int);
203extern u_long (*ip_mcast_src)(int);
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204extern int rsvp_on;
205extern struct pr_usrreqs rip_usrreqs;
206
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207int ip_ctloutput(struct socket *, struct sockopt *sopt);
208void ip_drain(void);
209void ip_freemoptions(struct ip_moptions *);
210void ip_init(void);
211extern int (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *,
212 struct ip_moptions *);
213int ip_output(struct mbuf *,
214 struct mbuf *, struct route *, int, struct ip_moptions *);
215int ip_output_list(struct mbuf *, int,
216 struct mbuf *, struct route *, int, struct ip_moptions *);
217struct in_ifaddr *
218 ip_rtaddr(struct in_addr, struct route *);
219void ip_savecontrol(struct inpcb *, struct mbuf **, struct ip *,
220 struct mbuf *);
221void ip_slowtimo(void);
1c79356b 222struct mbuf *
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223 ip_srcroute(void);
224void ip_stripoptions(struct mbuf *, struct mbuf *);
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225#if RANDOM_IP_ID
226u_int16_t
91447636 227 ip_randomid(void);
9bccf70c 228#endif
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229int rip_ctloutput(struct socket *, struct sockopt *);
230void rip_ctlinput(int, struct sockaddr *, void *);
231void rip_init(void);
232void rip_input(struct mbuf *, int);
233int rip_output(struct mbuf *, struct socket *, u_long);
234int rip_unlock(struct socket *, int, int);
235void ipip_input(struct mbuf *, int);
236void rsvp_input(struct mbuf *, int);
237int ip_rsvp_init(struct socket *);
238int ip_rsvp_done(void);
239int ip_rsvp_vif_init(struct socket *, struct sockopt *);
240int ip_rsvp_vif_done(struct socket *, struct sockopt *);
241void ip_rsvp_force_done(struct socket *);
1c79356b 242
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243void in_delayed_cksum(struct mbuf *m);
244
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245#endif /* KERNEL_PRIVATE */
246#endif /* !_NETINET_IP_VAR_H_ */