ip.h@ 15055

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1	/*
2	* Copyright (c) 1982, 1986, 1993
3	* The Regents of the University of California. All rights reserved.
4	*
5	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions
7	* are met:
8	* 1. Redistributions of source code must retain the above copyright
9	* notice, this list of conditions and the following disclaimer.
10	* 2. Redistributions in binary form must reproduce the above copyright
11	* notice, this list of conditions and the following disclaimer in the
12	* documentation and/or other materials provided with the distribution.
13	* 3. All advertising materials mentioning features or use of this software
14	* must display the following acknowledgement:
15	* This product includes software developed by the University of
16	* California, Berkeley and its contributors.
17	* 4. Neither the name of the University nor the names of its contributors
18	* may be used to endorse or promote products derived from this software
19	* without specific prior written permission.
20	*
21	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31	* SUCH DAMAGE.
32	*
33	* @(#)ip.h 8.1 (Berkeley) 6/10/93
34	* ip.h,v 1.3 1994/08/21 05:27:30 paul Exp
35	*/
36
37	#ifndef _IP_H_
38	#define _IP_H_
39
40	#ifdef VBOX_WITH_BSD_REASS
41	# include "queue.h"
42	#endif
43
44	#ifdef WORDS_BIGENDIAN
45	# ifndef NTOHL
46	# define NTOHL(d)
47	# endif
48	# ifndef NTOHS
49	# define NTOHS(d)
50	# endif
51	# ifndef HTONL
52	# define HTONL(d)
53	# endif
54	# ifndef HTONS
55	# define HTONS(d)
56	# endif
57	#else
58	# ifndef NTOHL
59	# define NTOHL(d) ((d) = ntohl((d)))
60	# endif
61	# ifndef NTOHS
62	# define NTOHS(d) ((d) = ntohs((u_int16_t)(d)))
63	# endif
64	# ifndef HTONL
65	# define HTONL(d) ((d) = htonl((d)))
66	# endif
67	# ifndef HTONS
68	# define HTONS(d) ((d) = htons((u_int16_t)(d)))
69	# endif
70	#endif
71
72	/*
73	* Definitions for internet protocol version 4.
74	* Per RFC 791, September 1981.
75	*/
76	#define IPVERSION 4
77
78	/*
79	* Structure of an internet header, naked of options.
80	*/
81	struct ip
82	{
83	#ifdef WORDS_BIGENDIAN
84	# ifdef _MSC_VER
85	uint8_t ip_v:4; /* version */
86	uint8_t ip_hl:4; /* header length */
87	# else
88	unsigned ip_v:4; /* version */
89	unsigned ip_hl:4; /* header length */
90	# endif
91	#else
92	# ifdef _MSC_VER
93	uint8_t ip_hl:4; /* header length */
94	uint8_t ip_v:4; /* version */
95	# else
96	unsigned ip_hl:4; /* header length */
97	unsigned ip_v:4; /* version */
98	# endif
99	#endif
100	uint8_t ip_tos; /* type of service */
101	uint16_t ip_len; /* total length */
102	uint16_t ip_id; /* identification */
103	uint16_t ip_off; /* fragment offset field */
104	#define IP_DF 0x4000 /* don't fragment flag */
105	#define IP_MF 0x2000 /* more fragments flag */
106	#define IP_OFFMASK 0x1fff /* mask for fragmenting bits */
107	uint8_t ip_ttl; /* time to live */
108	uint8_t ip_p; /* protocol */
109	uint16_t ip_sum; /* checksum */
110	struct in_addr ip_src; /* source address */
111	struct in_addr ip_dst; /* destination address */
112	};
113	AssertCompileSize(struct ip, 20);
114
115	#define IP_MAXPACKET 65535 /* maximum packet size */
116
117	/*
118	* Definitions for IP type of service (ip_tos)
119	*/
120	#define IPTOS_LOWDELAY 0x10
121	#define IPTOS_THROUGHPUT 0x08
122	#define IPTOS_RELIABILITY 0x04
123
124	/*
125	* Definitions for options.
126	*/
127	#define IPOPT_COPIED(o) ((o)&0x80)
128	#define IPOPT_CLASS(o) ((o)&0x60)
129	#define IPOPT_NUMBER(o) ((o)&0x1f)
130
131	#define IPOPT_CONTROL 0x00
132	#define IPOPT_RESERVED1 0x20
133	#define IPOPT_DEBMEAS 0x40
134	#define IPOPT_RESERVED2 0x60
135
136	#define IPOPT_EOL 0 /* end of option list */
137	#define IPOPT_NOP 1 /* no operation */
138
139	#define IPOPT_RR 7 /* record packet route */
140	#define IPOPT_TS 68 /* timestamp */
141	#define IPOPT_SECURITY 130 /* provide s,c,h,tcc */
142	#define IPOPT_LSRR 131 /* loose source route */
143	#define IPOPT_SATID 136 /* satnet id */
144	#define IPOPT_SSRR 137 /* strict source route */
145
146	/*
147	* Offsets to fields in options other than EOL and NOP.
148	*/
149	#define IPOPT_OPTVAL 0 /* option ID */
150	#define IPOPT_OLEN 1 /* option length */
151	#define IPOPT_OFFSET 2 /* offset within option */
152	#define IPOPT_MINOFF 4 /* min value of above */
153
154	/*
155	* Time stamp option structure.
156	*/
157	struct ip_timestamp
158	{
159	uint8_t ipt_code; /* IPOPT_TS */
160	uint8_t ipt_len; /* size of structure (variable) */
161	uint8_t ipt_ptr; /* index of current entry */
162	#ifdef WORDS_BIGENDIAN
163	# ifdef _MSC_VER
164	uint8_t ipt_oflw:4; /* overflow counter */
165	uint8_t ipt_flg:4; /* flags, see below */
166	# else
167	unsigned ipt_oflw:4; /* overflow counter */
168	unsigned ipt_flg:4; /* flags, see below */
169	# endif
170	#else
171	# ifdef _MSC_VER
172	uint8_t ipt_flg:4; /* flags, see below */
173	uint8_t ipt_oflw:4; /* overflow counter */
174	# else
175	unsigned ipt_flg:4; /* flags, see below */
176	unsigned ipt_oflw:4; /* overflow counter */
177	# endif
178	#endif
179	union ipt_timestamp
180	{
181	uint32_t ipt_time[1];
182	struct ipt_ta
183	{
184	struct in_addr ipt_addr;
185	uint32_t ipt_time;
186	} ipt_ta[1];
187	} ipt_timestamp;
188	};
189	AssertCompileSize(struct ip_timestamp, 12);
190
191	/* flag bits for ipt_flg */
192	#define IPOPT_TS_TSONLY 0 /* timestamps only */
193	#define IPOPT_TS_TSANDADDR 1 /* timestamps and addresses */
194	#define IPOPT_TS_PRESPEC 3 /* specified modules only */
195
196	/* bits for security (not byte swapped) */
197	#define IPOPT_SECUR_UNCLASS 0x0000
198	#define IPOPT_SECUR_CONFID 0xf135
199	#define IPOPT_SECUR_EFTO 0x789a
200	#define IPOPT_SECUR_MMMM 0xbc4d
201	#define IPOPT_SECUR_RESTR 0xaf13
202	#define IPOPT_SECUR_SECRET 0xd788
203	#define IPOPT_SECUR_TOPSECRET 0x6bc5
204
205	/*
206	* Internet implementation parameters.
207	*/
208	#define MAXTTL 255 /* maximum time to live (seconds) */
209	#define IPDEFTTL 64 /* default ttl, from RFC 1340 */
210	#define IPFRAGTTL 60 /* time to live for frags, slowhz */
211	#define IPTTLDEC 1 /* subtracted when forwarding */
212
213	#define IP_MSS 576 /* default maximum segment size */
214
215	#ifdef HAVE_SYS_TYPES32_H /* Overcome some Solaris 2.x junk */
216	# include <sys/types32.h>
217	#else
218	# if SIZEOF_CHAR_P == 4
219	typedef caddr_t caddr32_t;
220	# else
221	# if !defined(VBOX_WITH_BSD_REASS)
222	typedef u_int32_t caddr32_t;
223	# else /* VBOX_WITH_BSD_REASS */
224	typedef caddr_t caddr32_t;
225	# endif /* VBOX_WITH_BSD_REASS */
226	# endif
227	#endif
228
229	#if SIZEOF_CHAR_P == 4
230	typedef struct ipq_t *ipqp_32;
231	typedef struct ipasfrag *ipasfragp_32;
232	#else
233	typedef caddr32_t ipqp_32;
234	typedef caddr32_t ipasfragp_32;
235	#endif
236
237	/*
238	* Overlay for ip header used by other protocols (tcp, udp).
239	*/
240	struct ipovly
241	{
242	#if !defined(VBOX_WITH_BSD_REASS)
243	caddr32_t ih_next;
244	caddr32_t ih_prev; /* for protocol sequence q's */
245	u_int8_t ih_x1; /* (unused) */
246	#else /* VBOX_WITH_BSD_REASS */
247	u_int8_t ih_x1[9]; /* (unused) */
248	#endif /* VBOX_WITH_BSD_REASS */
249	u_int8_t ih_pr; /* protocol */
250	u_int16_t ih_len; /* protocol length */
251	struct in_addr ih_src; /* source internet address */
252	struct in_addr ih_dst; /* destination internet address */
253	};
254	AssertCompileSize(struct ipovly, 20);
255
256	/*
257	* Ip reassembly queue structure. Each fragment being reassembled is
258	* attached to one of these structures. They are timed out after ipq_ttl
259	* drops to 0, and may also be reclaimed if memory becomes tight.
260	* size 28 bytes
261	*/
262	struct ipq_t
263	{
264	#ifndef VBOX_WITH_BSD_REASS
265	ipqp_32 next;
266	ipqp_32 prev; /* to other reass headers */
267	#else /* VBOX_WITH_BSD_REASS */
268	TAILQ_ENTRY(ipq_t) ipq_list;
269	#endif /* VBOX_WITH_BSD_REASS */
270	u_int8_t ipq_ttl; /* time for reass q to live */
271	u_int8_t ipq_p; /* protocol of this fragment */
272	u_int16_t ipq_id; /* sequence id for reassembly */
273	#ifndef VBOX_WITH_BSD_REASS
274	ipasfragp_32 ipq_next;
275	ipasfragp_32 ipq_prev; /* to ip headers of fragments */
276	#else /* VBOX_WITH_BSD_REASS */
277	struct mbuf ipq_frags; / to ip headers of fragments */
278	uint8_t ipq_nfrags; /* # of fragments in this packet */
279	#endif /* VBOX_WITH_BSD_REASS */
280	struct in_addr ipq_src;
281	struct in_addr ipq_dst;
282	};
283
284	#ifdef VBOX_WITH_BSD_REASS
285	/*
286	* IP datagram reassembly.
287	*/
288	#define IPREASS_NHASH_LOG2 6
289	#define IPREASS_NHASH (1 << IPREASS_NHASH_LOG2)
290	#define IPREASS_HMASK (IPREASS_NHASH - 1)
291	#define IPREASS_HASH(x,y) \
292	(((((x) & 0xF) \| ((((x) >> 8) & 0xF) << 4)) ^ (y)) & IPREASS_HMASK)
293	TAILQ_HEAD(ipqhead,ipq_t);
294	#endif /* VBOX_WITH_BSD_REASS */
295
296	/*
297	* Ip header, when holding a fragment.
298	*
299	* Note: ipf_next must be at same offset as ipq_next above
300	*/
301	struct ipasfrag
302	{
303	#ifdef WORDS_BIGENDIAN
304	# ifdef _MSC_VER
305	uint8_t ip_v:4;
306	uint8_t ip_hl:4;
307	# else
308	unsigned ip_v:4;
309	unsigned ip_hl:4;
310	# endif
311	#else
312	# ifdef _MSC_VER
313	uint8_t ip_hl:4;
314	uint8_t ip_v:4;
315	# else
316	unsigned ip_hl:4;
317	unsigned ip_v:4;
318	# endif
319	#endif
320	u_int8_t ipf_mff; /* XXX overlays ip_tos: use low bit
321	* to avoid destroying tos (PPPDTRuu);
322	* copied from (ip_off & IP_MF) */
323	u_int16_t ip_len;
324	u_int16_t ip_id;
325	u_int16_t ip_off;
326	u_int8_t ip_ttl;
327	u_int8_t ip_p;
328	u_int16_t ip_sum;
329	ipasfragp_32 ipf_next; /* next fragment */
330	ipasfragp_32 ipf_prev; /* previous fragment */
331	};
332	#ifdef RT_ARCH_X86 \|\| !defined(VBOX_WITH_BSD_REASS)
333	AssertCompileSize(struct ipasfrag, 20);
334	#else
335	AssertCompileSize(struct ipasfrag, 32);
336	#endif
337
338	/*
339	* Structure stored in mbuf in inpcb.ip_options
340	* and passed to ip_output when ip options are in use.
341	* The actual length of the options (including ipopt_dst)
342	* is in m_len.
343	*/
344	#define MAX_IPOPTLEN 40
345
346	struct ipoption
347	{
348	struct in_addr ipopt_dst; /* first-hop dst if source routed */
349	int8_t ipopt_list[MAX_IPOPTLEN]; /* options proper */
350	};
351
352	/*
353	* Structure attached to inpcb.ip_moptions and
354	* passed to ip_output when IP multicast options are in use.
355	*/
356
357	struct ipstat_t
358	{
359	u_long ips_total; /* total packets received */
360	u_long ips_badsum; /* checksum bad */
361	u_long ips_tooshort; /* packet too short */
362	u_long ips_toosmall; /* not enough data */
363	u_long ips_badhlen; /* ip header length < data size */
364	u_long ips_badlen; /* ip length < ip header length */
365	u_long ips_fragments; /* fragments received */
366	u_long ips_fragdropped; /* frags dropped (dups, out of space) */
367	u_long ips_fragtimeout; /* fragments timed out */
368	u_long ips_forward; /* packets forwarded */
369	u_long ips_cantforward; /* packets rcvd for unreachable dest */
370	u_long ips_redirectsent; /* packets forwarded on same net */
371	u_long ips_noproto; /* unknown or unsupported protocol */
372	u_long ips_delivered; /* datagrams delivered to upper level*/
373	u_long ips_localout; /* total ip packets generated here */
374	u_long ips_odropped; /* lost packets due to nobufs, etc. */
375	u_long ips_reassembled; /* total packets reassembled ok */
376	u_long ips_fragmented; /* datagrams successfully fragmented */
377	u_long ips_ofragments; /* output fragments created */
378	u_long ips_cantfrag; /* don't fragment flag was set, etc. */
379	u_long ips_badoptions; /* error in option processing */
380	u_long ips_noroute; /* packets discarded due to no route */
381	u_long ips_badvers; /* ip version != 4 */
382	u_long ips_rawout; /* total raw ip packets generated */
383	u_long ips_unaligned; /* times the ip packet was not aligned */
384	};
385
386	#endif

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source: vbox/trunk/src/VBox/Devices/Network/slirp/ip.h@ 15055

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