WebSVN – HelenOS – Diff – /branches/network/uspace/srv/net/il/ip/ip_header.h


/*
 * Copyright (c) 2009 Lukas Mejdrech
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
/** @addtogroup ip
 *  @{
 */
 
/** @file
 *  IP header and options definitions.
 *  Based on the RFC~791.
 */
 
#ifndef __NET_IP_HEADER_H__
#define __NET_IP_HEADER_H__
 
#include <byteorder.h>
#include <sys/types.h>
 
/** Returns the actual IP header length.
 *  @param header The IP packet header. Input parameter.
 */
#define IP_HEADER_LENGTH( header )      (( header )->header_length * 4u )
 
/** Returns the actual IP header length.
 *  @param header The IP packet header. Input parameter.
 */
#define IP_COMPUTE_HEADER_LENGTH( length )      (( uint8_t ) (( length ) / 4u ))
 
/** Returns the actual IP packet total length.
 *  @param header The IP packet header. Input parameter.
 */
#define IP_TOTAL_LENGTH( header )       ntohs(( header )->total_length )
 
/** Returns the actual IP packet data length.
 *  @param header The IP packet header. Input parameter.
 */
#define IP_HEADER_DATA_LENGTH( header ) ( IP_TOTAL_LENGTH( header ) - IP_HEADER_LENGTH( header ))
 
/** Returns the IP packet header checksum.
 *  @param header The IP packet header. Input parameter.
 */
#define IP_HEADER_CHECKSUM( header )    ( htons( ip_checksum(( uint8_t * )( header ), IP_HEADER_LENGTH( header ))))
 
/** Returns the fragment offest.
 *  @param length The prefixed data total length. Input parameter.
 */
#define IP_COMPUTE_FRAGMENT_OFFSET( length ) (( length ) / 8 )
 
/** Type definition of the internet header.
 *  @see ip_header
 */
typedef struct ip_header    ip_header_t;
 
/** Type definition of the internet header pointer.
 *  @see ip_header
 */
typedef ip_header_t *       ip_header_ref;
 
/** Internet header.
 *  The variable options should be included after the header itself and indicated by the increased header length value.
 */
struct ip_header{
#ifdef ARCH_IS_BIG_ENDIAN
    /** The Version field indicates the format of the internet header.
     */
    uint8_t     version:4;
    /** Internet Header Length is the length of the internet header in 32~bit words, and thus points to the beginning of the data.
     *  Note that the minimum value for a~correct header is~5.
     */
    uint8_t     header_length:4;
#else
    /** Internet Header Length is the length of the internet header in 32~bit words, and thus points to the beginning of the data.
     *  Note that the minimum value for a~correct header is~5.
     */
    uint8_t     header_length:4;
    /** The Version field indicates the format of the internet header.
     */
    uint8_t     version:4;
#endif
    /** The Type of Service provides an indication of the abstract parameters of the quality of service desired.
     *  These parameters are to be used to guide the selection of the actual service parameters when transmitting a~datagram through a~particular network.
     *  Several networks offer service precedence, which somehow treats high precedence traffic as more important than other traffic (generally by accepting only traffic above a~certain precedence at time of high load).
     *  The major choice is a~three way tradeoff between low-delay, high-reliability, and high-throughput.
     */
    uint8_t     tos;
    /** Total Length is the length of the datagram, measured in octets, including internet header and data.
     *  This field allows the length of a~datagram to be up to 65,535~octets.
     */
    uint16_t    total_length;
    /** An identifying value assigned by the sender to aid in assembling the fragments of a~datagram.
     */
    uint16_t    identification;
#ifdef ARCH_IS_BIG_ENDIAN
    /** Various control flags.
     *  @see
     */
    uint16_t    flags:3;
    /** This field indicates where in the datagram this fragment belongs.
     */
    uint16_t    fragment_offset:3;
#else
    /** This field indicates where in the datagram this fragment belongs.
     */
    uint16_t    fragment_offset:13;
    /** Various control flags.
     */
    uint16_t    flags:3;
#endif
    /** This field indicates the maximum time the datagram is allowed to remain in the internet system.
     *  If this field contains the value zero, then the datagram must be destroyed.
     *  This field is modified in internet header processing.
     *  The time is measured in units of seconds, but since every module that processes a~datagram must decrease the TTL by at least one even if it process the datagram in less than a~second, the TTL must be thought of only as an upper bound on the time a~datagram may exist.
     *  The intention is to cause undeliverable datagrams to be discarded, and to bound the maximum datagram lifetime.
     */
    uint8_t     ttl;
    /** This field indicates the next level protocol used in the data portion of the internet datagram.
     */
    uint8_t     protocol;
    /** A checksum of the header only.
     *  Since some header fields change (e.g., time to live), this is recomputed and verified at each point that the internet header is processed.
     *  The checksum algorithm is: The checksum field is the 16~bit one's complement of the one's complement sum of all 16~bit words in the header.
     *  For purposes of computing the checksum, the value of the checksum field is zero.
     */
    uint16_t    header_checksum;
    /** The source address.
     */
    uint32_t    source_address;
    /** The destination address.
     */
    uint32_t    destination_address;
} __attribute__ ((packed));
 
/** Type definition of the internet option header.
 *  @see ip_header
 */
typedef struct ip_option    ip_option_t;
 
/** Type definition of the internet option header pointer.
 *  @see ip_header
 */
typedef ip_option_t *       ip_option_ref;
 
/** Internet option header.
 *  Only type field is always valid.
 *  Other fields' validity depends on the option type.
 */
struct ip_option{
    /** A single octet of option-type.
     */
    uint8_t     type;
    /** An option length octet.
     */
    uint8_t     length;
    /** A~pointer.
     */
    uint8_t     pointer;
#ifdef ARCH_IS_BIG_ENDIAN
    /** The number of IP modules that cannot register timestamps due to lack of space.
     */
    uint8_t overflow:4;
    /** Various internet timestamp control flags.
     */
    uint8_t flags:4;
#else
    /** Various internet timestamp control flags.
     */
    uint8_t flags:4;
    /** The number of IP modules that cannot register timestamps due to lack of space.
     */
    uint8_t overflow:4;
#endif
} __attribute__ ((packed));
 
/** @name IP flags definitions
 */
/*@{*/
 
/** Fragment flag field shift.
 */
#define IPFLAG_FRAGMENT_SHIFT       1
 
/** Fragmented flag field shift.
 */
#define IPFLAG_FRAGMENTED_SHIFT     0
 
/** May fragment flag value.
 *  Allows the packet fragmentation.
 */
#define IPFLAG_MAY_FRAGMENT         ( 0x0 << IPFLAG_FRAGMENT_SHIFT )
 
/** Don't fragment flag value.
 *  Permits the packet fragmentation.
 */
#define IPFLAG_DONT_FRAGMENT        ( 0x1 << IPFLAG_FRAGMENT_SHIFT )
 
/** Last fragment flag value.
 *  Indicates the last packet fragment.
 */
#define IPFLAG_LAST_FRAGMENT        ( 0x0 << IPFLAG_FRAGMENTED_SHIFT )
 
/** More fragments flag value.
 *  Indicates that more packet fragments follow.
 */
#define IPFLAG_MORE_FRAGMENTS       ( 0x1 << IPFLAG_FRAGMENTED_SHIFT )
 
/*@}*/
 
 
 
 
 
 
 
 
 
/** Type definition of the internet version 4 pseudo header.
 *  @see ipv4_pseudo_header
 */
typedef struct ipv4_pseudo_header   ipv4_pseudo_header_t;
 
/** Type definition of the internet version 4 pseudo header pointer.
 *  @see ipv4_pseudo_header
 */
typedef ipv4_pseudo_header_t *      ipv4_pseudo_header_ref;
 
/** Internet version 4 pseudo header.
 */
struct ipv4_pseudo_header{
    /** The source address.
     */
    uint32_t    source_address;
    /** The destination address.
     */
    uint32_t    destination_address;
    /** Reserved byte.
     *  Must be zero.
     */
    uint8_t     reserved;
    /** This field indicates the next level protocol used in the data portion of the internet datagram.
     */
    uint8_t     protocol;
    /** Data length is the length of the datagram, measured in octets.
     */
    uint16_t    data_length;
} __attribute__ ((packed));
 
#endif
 
/** @}
 */
 

Rev 4722	Rev 4728
1	/*	1	/*
2	* Copyright (c) 2009 Lukas Mejdrech	2	* Copyright (c) 2009 Lukas Mejdrech
3	* All rights reserved.	3	* All rights reserved.
4	*	4	*
5	* Redistribution and use in source and binary forms, with or without	5	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions	6	* modification, are permitted provided that the following conditions
7	* are met:	7	* are met:
8	*	8	*
9	* - Redistributions of source code must retain the above copyright	9	* - Redistributions of source code must retain the above copyright
10	* notice, this list of conditions and the following disclaimer.	10	* notice, this list of conditions and the following disclaimer.
11	* - Redistributions in binary form must reproduce the above copyright	11	* - Redistributions in binary form must reproduce the above copyright
12	* notice, this list of conditions and the following disclaimer in the	12	* notice, this list of conditions and the following disclaimer in the
13	* documentation and/or other materials provided with the distribution.	13	* documentation and/or other materials provided with the distribution.
14	* - The name of the author may not be used to endorse or promote products	14	* - The name of the author may not be used to endorse or promote products
15	* derived from this software without specific prior written permission.	15	* derived from this software without specific prior written permission.
16	*	16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES	18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF	25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27	*/	27	*/
28		28
29	/** @addtogroup ip	29	/** @addtogroup ip
30	* @{	30	* @{
31	*/	31	*/
32		32
33	/** @file	33	/** @file
34	* IP header and options definitions.	34	* IP header and options definitions.
35	* Names according to the linux src/include/linux/ip.h header file.	35	* Based on the RFC~791.
36	*/	36	*/
37		37
38	#ifndef __NET_IP_HEADER_H__	38	#ifndef __NET_IP_HEADER_H__
39	#define __NET_IP_HEADER_H__	39	#define __NET_IP_HEADER_H__
40		40
41	#include <byteorder.h>	41	#include <byteorder.h>
42	#include <sys/types.h>	42	#include <sys/types.h>
43		43
-		44	/** Returns the actual IP header length.
-		45	* @param header The IP packet header. Input parameter.
-		46	*/
-		47	#define IP_HEADER_LENGTH( header ) (( header )->header_length * 4u )
-		48
-		49	/** Returns the actual IP header length.
-		50	* @param header The IP packet header. Input parameter.
-		51	*/
-		52	#define IP_COMPUTE_HEADER_LENGTH( length ) (( uint8_t ) (( length ) / 4u ))
-		53
-		54	/** Returns the actual IP packet total length.
-		55	* @param header The IP packet header. Input parameter.
-		56	*/
-		57	#define IP_TOTAL_LENGTH( header ) ntohs(( header )->total_length )
-		58
-		59	/** Returns the actual IP packet data length.
-		60	* @param header The IP packet header. Input parameter.
-		61	*/
-		62	#define IP_HEADER_DATA_LENGTH( header ) ( IP_TOTAL_LENGTH( header ) - IP_HEADER_LENGTH( header ))
-		63
-		64	/** Returns the IP packet header checksum.
-		65	* @param header The IP packet header. Input parameter.
-		66	*/
-		67	#define IP_HEADER_CHECKSUM( header ) ( htons( ip_checksum(( uint8_t * )( header ), IP_HEADER_LENGTH( header ))))
-		68
-		69	/** Returns the fragment offest.
-		70	* @param length The prefixed data total length. Input parameter.
-		71	*/
-		72	#define IP_COMPUTE_FRAGMENT_OFFSET( length ) (( length ) / 8 )
-		73
44	/** Type definition of the internet header.	74	/** Type definition of the internet header.
45	* @see ip_header	75	* @see ip_header
46	*/	76	*/
47	typedef struct ip_header ip_header_t;	77	typedef struct ip_header ip_header_t;
48		78
49	/** Type definition of the internet header pointer.	79	/** Type definition of the internet header pointer.
50	* @see ip_header	80	* @see ip_header
51	*/	81	*/
52	typedef ip_header_t * ip_header_ref;	82	typedef ip_header_t * ip_header_ref;
53		83
54	/** Internet header.	84	/** Internet header.
55	* The variable options should be included after the header itself and indicated by the increased header length value.	85	* The variable options should be included after the header itself and indicated by the increased header length value.
56	*/	86	*/
57	struct ip_header{	87	struct ip_header{
58	#ifdef ARCH_IS_BIG_ENDIAN	88	#ifdef ARCH_IS_BIG_ENDIAN
59	/** The Version field indicates the format of the internet header.	89	/** The Version field indicates the format of the internet header.
60	*/	90	*/
61	uint8_t version:4;	91	uint8_t version:4;
62	/** Internet Header Length is the length of the internet header in 32~bit words, and thus points to the beginning of the data.	92	/** Internet Header Length is the length of the internet header in 32~bit words, and thus points to the beginning of the data.
63	* Note that the minimum value for a~correct header is~5.	93	* Note that the minimum value for a~correct header is~5.
64	*/	94	*/
65	uint8_t ihl:4;	95	uint8_t header_length:4;
66	#else	96	#else
67	/** Internet Header Length is the length of the internet header in 32~bit words, and thus points to the beginning of the data.	97	/** Internet Header Length is the length of the internet header in 32~bit words, and thus points to the beginning of the data.
68	* Note that the minimum value for a~correct header is~5.	98	* Note that the minimum value for a~correct header is~5.
69	*/	99	*/
70	uint8_t ihl:4;	100	uint8_t header_length:4;
71	/** The Version field indicates the format of the internet header.	101	/** The Version field indicates the format of the internet header.
72	*/	102	*/
73	uint8_t version:4;	103	uint8_t version:4;
74	#endif	104	#endif
75	/** The Type of Service provides an indication of the abstract parameters of the quality of service desired.	105	/** The Type of Service provides an indication of the abstract parameters of the quality of service desired.
76	* These parameters are to be used to guide the selection of the actual service parameters when transmitting a~datagram through a~particular network.	106	* These parameters are to be used to guide the selection of the actual service parameters when transmitting a~datagram through a~particular network.
77	* Several networks offer service precedence, which somehow treats high precedence traffic as more important than other traffic (generally by accepting only traffic above a~certain precedence at time of high load).	107	* Several networks offer service precedence, which somehow treats high precedence traffic as more important than other traffic (generally by accepting only traffic above a~certain precedence at time of high load).
78	* The major choice is a~three way tradeoff between low-delay, high-reliability, and high-throughput.	108	* The major choice is a~three way tradeoff between low-delay, high-reliability, and high-throughput.
79	*/	109	*/
80	uint8_t tos;	110	uint8_t tos;
81	/** Total Length is the length of the datagram, measured in octets, including internet header and data.	111	/** Total Length is the length of the datagram, measured in octets, including internet header and data.
82	* This field allows the length of a~datagram to be up to 65,535~octets.	112	* This field allows the length of a~datagram to be up to 65,535~octets.
83	*/	113	*/
84	uint16_t total_length;	114	uint16_t total_length;
85	/** An identifying value assigned by the sender to aid in assembling the fragments of a~datagram.	115	/** An identifying value assigned by the sender to aid in assembling the fragments of a~datagram.
86	*/	116	*/
87	uint16_t identification;	117	uint16_t identification;
88	#ifdef ARCH_IS_BIG_ENDIAN	118	#ifdef ARCH_IS_BIG_ENDIAN
89	/** Various control flags.	119	/** Various control flags.
90	* @see	120	* @see
91	*/	121	*/
92	uint16_t flags:3;	122	uint16_t flags:3;
93	/** This field indicates where in the datagram this fragment belongs.	123	/** This field indicates where in the datagram this fragment belongs.
94	*/	124	*/
95	uint16_t fragment_offset:3;	125	uint16_t fragment_offset:3;
96	#else	126	#else
97	/** This field indicates where in the datagram this fragment belongs.	127	/** This field indicates where in the datagram this fragment belongs.
98	*/	128	*/
99	uint16_t fragment_offset:13;	129	uint16_t fragment_offset:13;
100	/** Various control flags.	130	/** Various control flags.
101	*/	131	*/
102	uint16_t flags:3;	132	uint16_t flags:3;
103	#endif	133	#endif
104	/** This field indicates the maximum time the datagram is allowed to remain in the internet system.	134	/** This field indicates the maximum time the datagram is allowed to remain in the internet system.
105	* If this field contains the value zero, then the datagram must be destroyed.	135	* If this field contains the value zero, then the datagram must be destroyed.
106	* This field is modified in internet header processing.	136	* This field is modified in internet header processing.
107	* The time is measured in units of seconds, but since every module that processes a~datagram must decrease the TTL by at least one even if it process the datagram in less than a~second, the TTL must be thought of only as an upper bound on the time a~datagram may exist.	137	* The time is measured in units of seconds, but since every module that processes a~datagram must decrease the TTL by at least one even if it process the datagram in less than a~second, the TTL must be thought of only as an upper bound on the time a~datagram may exist.
108	* The intention is to cause undeliverable datagrams to be discarded, and to bound the maximum datagram lifetime.	138	* The intention is to cause undeliverable datagrams to be discarded, and to bound the maximum datagram lifetime.
109	*/	139	*/
110	uint8_t ttl;	140	uint8_t ttl;
111	/** This field indicates the next level protocol used in the data portion of the internet datagram.	141	/** This field indicates the next level protocol used in the data portion of the internet datagram.
112	*/	142	*/
113	uint8_t protocol;	143	uint8_t protocol;
114	/** A checksum of the header only.	144	/** A checksum of the header only.
115	* Since some header fields change (e.g., time to live), this is recomputed and verified at each point that the internet header is processed.	145	* Since some header fields change (e.g., time to live), this is recomputed and verified at each point that the internet header is processed.
116	* The checksum algorithm is: The checksum field is the 16~bit one's complement of the one's complement sum of all 16~bit words in the header.	146	* The checksum algorithm is: The checksum field is the 16~bit one's complement of the one's complement sum of all 16~bit words in the header.
117	* For purposes of computing the checksum, the value of the checksum field is zero.	147	* For purposes of computing the checksum, the value of the checksum field is zero.
118	*/	148	*/
119	uint16_t header_checksum;	149	uint16_t header_checksum;
120	/** The source address.	150	/** The source address.
121	*/	151	*/
122	uint32_t source_address;	152	uint32_t source_address;
123	/** The destination address.	153	/** The destination address.
124	*/	154	*/
125	uint32_t destination_address;	155	uint32_t destination_address;
126	} __attribute__ ((packed));	156	} __attribute__ ((packed));
127		157
128	/** Type definition of the internet option header.	158	/** Type definition of the internet option header.
129	* @see ip_header	159	* @see ip_header
130	*/	160	*/
131	typedef struct ip_option ip_option_t;	161	typedef struct ip_option ip_option_t;
132		162
133	/** Type definition of the internet option header pointer.	163	/** Type definition of the internet option header pointer.
134	* @see ip_header	164	* @see ip_header
135	*/	165	*/
136	typedef ip_option_t * ip_option_ref;	166	typedef ip_option_t * ip_option_ref;
137		167
138	/** Internet option header.	168	/** Internet option header.
139	* Only type field is always valid.	169	* Only type field is always valid.
140	* Other fields' validity depends on the option type.	170	* Other fields' validity depends on the option type.
141	*/	171	*/
142	struct ip_option{	172	struct ip_option{
143	/** A single octet of option-type.	173	/** A single octet of option-type.
144	*/	174	*/
145	uint8_t type;	175	uint8_t type;
146	/** An option length octet.	176	/** An option length octet.
147	*/	177	*/
148	uint8_t length;	178	uint8_t length;
149	/** A~pointer.	179	/** A~pointer.
150	*/	180	*/
151	uint8_t pointer;	181	uint8_t pointer;
152	#ifdef ARCH_IS_BIG_ENDIAN	182	#ifdef ARCH_IS_BIG_ENDIAN
153	/** The number of IP modules that cannot register timestamps due to lack of space.	183	/** The number of IP modules that cannot register timestamps due to lack of space.
154	*/	184	*/
155	uint8_t overflow:4;	185	uint8_t overflow:4;
156	/** Various internet timestamp control flags.	186	/** Various internet timestamp control flags.
157	*/	187	*/
158	uint8_t flags:4;	188	uint8_t flags:4;
159	#else	189	#else
160	/** Various internet timestamp control flags.	190	/** Various internet timestamp control flags.
161	*/	191	*/
162	uint8_t flags:4;	192	uint8_t flags:4;
163	/** The number of IP modules that cannot register timestamps due to lack of space.	193	/** The number of IP modules that cannot register timestamps due to lack of space.
164	*/	194	*/
165	uint8_t overflow:4;	195	uint8_t overflow:4;
166	#endif	196	#endif
167	} __attribute__ ((packed));	197	} __attribute__ ((packed));
168		198
169	/** @name IP flags definitions	199	/** @name IP flags definitions
170	*/	200	*/
171	/@{/	201	/@{/
172		202
173	/** Fragment flag field shift.	203	/** Fragment flag field shift.
174	*/	204	*/
175	#define IPFLAG_FRAGMENT_SHIFT 1	205	#define IPFLAG_FRAGMENT_SHIFT 1
176		206
177	/** Fragmented flag field shift.	207	/** Fragmented flag field shift.
178	*/	208	*/
179	#define IPFLAG_FRAGMENTED_SHIFT 0	209	#define IPFLAG_FRAGMENTED_SHIFT 0
180		210
181	/** May fragment flag value.	211	/** May fragment flag value.
182	* Allows the packet fragmentation.	212	* Allows the packet fragmentation.
183	*/	213	*/
184	#define IPFLAG_MAY_FRAGMENT ( 0x0 << IPFLAG_FRAGMENT_SHIFT )	214	#define IPFLAG_MAY_FRAGMENT ( 0x0 << IPFLAG_FRAGMENT_SHIFT )
185		215
186	/** Don't fragment flag value.	216	/** Don't fragment flag value.
187	* Permits the packet fragmentation.	217	* Permits the packet fragmentation.
188	*/	218	*/
189	#define IPFLAG_DONT_FRAGMENT ( 0x1 << IPFLAG_FRAGMENT_SHIFT )	219	#define IPFLAG_DONT_FRAGMENT ( 0x1 << IPFLAG_FRAGMENT_SHIFT )
190		220
191	/** Last fragment flag value.	221	/** Last fragment flag value.
192	* Indicates the last packet fragment.	222	* Indicates the last packet fragment.
193	*/	223	*/
194	#define IPFLAG_LAST_FRAGMENT ( 0x0 << IPFLAG_FRAGMENTED_SHIFT )	224	#define IPFLAG_LAST_FRAGMENT ( 0x0 << IPFLAG_FRAGMENTED_SHIFT )
195		225
196	/** More fragments flag value.	226	/** More fragments flag value.
197	* Indicates that more packet fragments follow.	227	* Indicates that more packet fragments follow.
198	*/	228	*/
199	#define IPFLAG_MORE_FRAGMENTS ( 0x1 << IPFLAG_FRAGMENTED_SHIFT )	229	#define IPFLAG_MORE_FRAGMENTS ( 0x1 << IPFLAG_FRAGMENTED_SHIFT )
200		230
201	/@}/	231	/@}/
202		232
203	/*	-
204	#define IPOPT_OPTVAL 0	-
205	#define IPOPT_OLEN 1	-
206	#define IPOPT_OFFSET 2	-
207	#define IPOPT_MINOFF 4	-
208	#define MAX_IPOPTLEN 40	-
209	*/	-
210		-
211	/** Type definition of the internet version 4 pseudo header.	233	/** Type definition of the internet version 4 pseudo header.
212	* @see ipv4_pseudo_header	234	* @see ipv4_pseudo_header
213	*/	235	*/
214	typedef struct ipv4_pseudo_header ipv4_pseudo_header_t;	236	typedef struct ipv4_pseudo_header ipv4_pseudo_header_t;
215		237
216	/** Type definition of the internet version 4 pseudo header pointer.	238	/** Type definition of the internet version 4 pseudo header pointer.
217	* @see ipv4_pseudo_header	239	* @see ipv4_pseudo_header
218	*/	240	*/
219	typedef ipv4_pseudo_header_t * ipv4_pseudo_header_ref;	241	typedef ipv4_pseudo_header_t * ipv4_pseudo_header_ref;
220		242
221	/** Internet version 4 pseudo header.	243	/** Internet version 4 pseudo header.
222	*/	244	*/
223	struct ipv4_pseudo_header{	245	struct ipv4_pseudo_header{
224	/** The source address.	246	/** The source address.
225	*/	247	*/
226	uint32_t source_address;	248	uint32_t source_address;
227	/** The destination address.	249	/** The destination address.
228	*/	250	*/
229	uint32_t destination_address;	251	uint32_t destination_address;
230	/** Zero byte.	252	/** Reserved byte.
-		253	* Must be zero.
231	*/	254	*/
232	uint8_t zero;	255	uint8_t reserved;
233	/** This field indicates the next level protocol used in the data portion of the internet datagram.	256	/** This field indicates the next level protocol used in the data portion of the internet datagram.
234	*/	257	*/
235	uint8_t protocol;	258	uint8_t protocol;
236	/** Data length is the length of the datagram, measured in octets.	259	/** Data length is the length of the datagram, measured in octets.
237	*/	260	*/
238	uint16_t data_length;	261	uint16_t data_length;
239	} __attribute__ ((packed));	262	} __attribute__ ((packed));
240		263
241	#endif	264	#endif
242		265
243	/** @}	266	/** @}
244	*/	267	*/
245		268

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(root)/branches/network/uspace/srv/net/il/ip/ip_header.h – Rev 4722 → 4728