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#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 <types.h>
 42 
#include <sys/types.h>
43 
 
 43 
 
44 
/** Type definition of the internet header.
 44 
/** Type definition of the internet header.
45 
 *  @see ip_header
 45 
 *  @see ip_header
46 
 */
 46 
 */
47 
typedef struct ip_header    ip_header_t;
 47 
typedef struct ip_header    ip_header_t;
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 */
 56 
 */
57 
struct ip_header{
 57 
struct ip_header{
58 
#ifdef ARCH_IS_BIG_ENDIAN
 58 
#ifdef ARCH_IS_BIG_ENDIAN
59 
    /** The Version field indicates the format of the internet header.
 59 
    /** The Version field indicates the format of the internet header.
60 
     */
 60 
     */
61 
    uint8_t:4   version;
 61 
    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.
 62 
    /** 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.
 63 
     *  Note that the minimum value for a~correct header is~5.
64 
     */
 64 
     */
65 
    uint8_t:4   ihl;
 65 
    uint8_t     ihl:4;
66 
#else
 66 
#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.
 67 
    /** 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.
 68 
     *  Note that the minimum value for a~correct header is~5.
69 
     */
 69 
     */
70 
    uint8_t:4   ihl;
 70 
    uint8_t     ihl:4;
71 
    /** The Version field indicates the format of the internet header.
 71 
    /** The Version field indicates the format of the internet header.
72 
     */
 72 
     */
73 
    uint8_t:4   version;
 73 
    uint8_t     version:4;
74 
#endif
 74 
#endif
75 
    /** The Type of Service provides an indication of the abstract parameters of the quality of service desired.
 75 
    /** 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.
 76 
     *  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).
 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).
78 
     *  The major choice is a~three way tradeoff between low-delay, high-reliability, and high-throughput.
 78 
     *  The major choice is a~three way tradeoff between low-delay, high-reliability, and high-throughput.
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     *  This field allows the length of a~datagram to be up to 65,535~octets.
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     *  This field allows the length of a~datagram to be up to 65,535~octets.
83 
     */
 83 
     */
84 
    uint16_t    total_length;
 84 
    uint16_t    total_length;
85 
    /** An identifying value assigned by the sender to aid in assembling the fragments of a~datagram.
 85 
    /** An identifying value assigned by the sender to aid in assembling the fragments of a~datagram.
86 
     */
 86 
     */
87 
    unit16_t    identification;
 87 
    uint16_t    identification;
88 
#ifdef ARCH_IS_BIG_ENDIAN
 88 
#ifdef ARCH_IS_BIG_ENDIAN
89 
    /** Various control flags.
 89 
    /** Various control flags.
90 
     */
 90 
     */
91 
    uint_16:3   flags;
 91 
    uint16_t    flags:3;
92 
    /** This field indicates where in the datagram this fragment belongs.
 92 
    /** This field indicates where in the datagram this fragment belongs.
93 
     */
 93 
     */
94 
    uint_16:13  fragment_offset;
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    uint16_t    fragment_offset:3;
95 
#else
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#else
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    /** This field indicates where in the datagram this fragment belongs.
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    /** This field indicates where in the datagram this fragment belongs.
97 
     */
 97 
     */
98 
    uint_16:13  fragment_offset;
 98 
    uint16_t    fragment_offset:13;
99 
    /** Various control flags.
 99 
    /** Various control flags.
100 
     */
 100 
     */
101 
    uint_16:3   flags;
 101 
    uint16_t    flags:3;
102 
#endif
 102 
#endif
103 
    /** This field indicates the maximum time the datagram is allowed to remain in the internet system.
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    /** This field indicates the maximum time the datagram is allowed to remain in the internet system.
104 
     *  If this field contains the value zero, then the datagram must be destroyed.
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     *  If this field contains the value zero, then the datagram must be destroyed.
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     *  This field is modified in internet header processing.
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     *  This field is modified in internet header processing.
106 
     *  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.
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     *  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.
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typedef struct ip_option    ip_option_t;
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typedef struct ip_option    ip_option_t;
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/** Type definition of the internet option header pointer.
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/** Type definition of the internet option header pointer.
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 *  @see ip_header
 133 
 *  @see ip_header
134 
 */
 134 
 */
135 
typedef ip_option *     ip_option_ref;
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typedef ip_option_t *       ip_option_ref;
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137 
/** Internet option header.
 137 
/** Internet option header.
138 
 *  Only type field is always valid.
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 *  Only type field is always valid.
139 
 *  Other fields' validity depends on the option type.
 139 
 *  Other fields' validity depends on the option type.
140 
 */
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 */
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     */
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     */
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    uint8_t     pointer;
 150 
    uint8_t     pointer;
151 
#ifdef ARCH_IS_BIG_ENDIAN
 151 
#ifdef ARCH_IS_BIG_ENDIAN
152 
    /** The number of IP modules that cannot register timestamps due to lack of space.
 152 
    /** The number of IP modules that cannot register timestamps due to lack of space.
153 
     */
 153 
     */
154 
    uint8_t:4   overflow;
 154 
    uint8_t overflow:4;
155 
    /** Various internet timestamp control flags.
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    /** Various internet timestamp control flags.
156 
     */
 156 
     */
157 
    uint8_t:4   flags;
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    uint8_t flags:4;
158 
#else
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#else
159 
    /** Various internet timestamp control flags.
 159 
    /** Various internet timestamp control flags.
160 
     */
 160 
     */
161 
    uint8_t:4   flags;
 161 
    uint8_t flags:4;
162 
    /** The number of IP modules that cannot register timestamps due to lack of space.
 162 
    /** The number of IP modules that cannot register timestamps due to lack of space.
163 
     */
 163 
     */
164 
    uint8_t:4   overflow;
 164 
    uint8_t overflow:4;
165 
#endif
 165 
#endif
166 
} __attribute__ ((packed));
 166 
} __attribute__ ((packed));
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#define IPTOS_TOS_MASK              0x1E
 - 
 
169 
#define IPTOS_PRECEDENCE_SHIFT      5
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#define IPTOS_DELAY_SHIFT           4
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#define IPTOS_THROUGHPUT_SHIFT      3
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#define IPTOS_RELIABILITY_SHIFT     2
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#define IPTOS_COST_SHIFT            1
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#define IPTOS_NORMALDELAY           ( 0x0 << IPTOS_DELAY_SHIFT )
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#define IPTOS_LOWDELAY              ( 0x1 << IPTOS_DELAY_SHIFT )
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#define IPTOS_NORMALTHROUGHPUT      ( 0x0 << IPTOS_THROUGHPUT_SHIFT )
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#define IPTOS_THROUGHPUT            ( 0x1 << IPTOS_THROUGHPUT_SHIFT )
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 - 
 
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#define IPTOS_NORMALRELIABILITY     ( 0x0 << IPTOS_RELIABILITY_SHIFT )
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#define IPTOS_RELIABILITY           ( 0x1 << IPTOS_RELIABILITY_SHIFT )
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 - 
 
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#define IPTOS_NORMALCOST            ( 0x0 << IPTOS_COST_SHIFT )
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#define IPTOS_MICNCOST              ( 0x1 << IPTOS_COST_SHIFT )
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186 
 
 - 
 
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#define IPTOS_PREC_MASK             0xE0
 - 
 
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#define IPTOS_PREC_ROUTINE          ( 0x0 << IPTOS_PRECEDENCE_SHIFT )
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189 
#define IPTOS_PREC_PRIORITY         ( 0x1 << IPTOS_PRECEDENCE_SHIFT )
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#define IPTOS_PREC_IMMEDIATE        ( 0x2 << IPTOS_PRECEDENCE_SHIFT )
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#define IPTOS_PREC_FLASH            ( 0x3 << IPTOS_PRECEDENCE_SHIFT )
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#define IPTOS_PREC_FLASHOVERRIDE    ( 0x4 << IPTOS_PRECEDENCE_SHIFT )
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193 
#define IPTOS_PREC_CRITIC_ECP       ( 0x5 << IPTOS_PRECEDENCE_SHIFT )
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#define IPTOS_PREC_INTERNETCONTROL  ( 0x6 << IPTOS_PRECEDENCE_SHIFT )
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#define IPTOS_PREC_NETCONTROL       ( 0x7 << IPTOS_PRECEDENCE_SHIFT )
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#define IPFLAG_FRAGMENT_SHIFT       1
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#define IPFLAG_FRAGMENT_SHIFT       1
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#define IPFLAG_FRAGMENTED_SHIFT     0
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#define IPFLAG_FRAGMENTED_SHIFT     0
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#define IPFLAG_MAY_FRAGMENT         ( 0x0 << IPFLAG_FRAGMENT_SHIFT )
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#define IPFLAG_MAY_FRAGMENT         ( 0x0 << IPFLAG_FRAGMENT_SHIFT )
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#define IPFLAG_DONT_FRAGMENT        ( 0x1 << IPFLAG_FRAGMENT_SHIFT )
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#define IPFLAG_DONT_FRAGMENT        ( 0x1 << IPFLAG_FRAGMENT_SHIFT )
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 173 
 
203 
#define IPFLAG_LAST_FRAGMENT        ( 0x0 << IPFLAG_FRAGMENTED_SHIFT )
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#define IPFLAG_LAST_FRAGMENT        ( 0x0 << IPFLAG_FRAGMENTED_SHIFT )
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#define IPFLAG_MORE_FRAGMENTS       ( 0x1 << IPFLAG_FRAGMENTED_SHIFT )
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#define IPFLAG_MORE_FRAGMENTS       ( 0x1 << IPFLAG_FRAGMENTED_SHIFT )
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206 
#define IPOPT_COPY_SHIFT            7
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207 
#define IPOPT_CLASS_SHIFT           5
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#define IPOPT_NUMBER_SHIFT          0
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209 
#define IPOPT_CLASS_MASK            0x60
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210 
#define IPOPT_NUMBER_MASK           0x1F
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211 
 
 - 
 
212 
#define IPOPT_COPY                  ( 1 << IPOPT_COPY_SHIFT )
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 - 
 
214 
#define IPOPT_TYPE( copy, class, number )   ((( copy ) & IPOPT_COPY ) | (( class ) & IPOPT_CLASS_MASK ) | (( number << IPOPT_NUMBER_SHIFT ) & IPOPT_NUMBER_MASK ))
 - 
 
215 
 
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#define IPOPT_COPIED( o )           (( o ) & IPOPT_COPY )
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217 
#define IPOPT_CLASS( o )            (( o ) & IPOPT_CLASS_MASK )
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218 
#define IPOPT_NUMBER( o )           (( o ) & IPOPT_NUMBER_MASK )
 - 
 
219 
 
 - 
 
220 
#define IPOPT_CONTROL               ( 1 << IPOPT_CLASS_SHIFT )
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221 
#define IPOPT_RESERVED1             ( 2 << IPOPT_CLASS_SHIFT )
 - 
 
222 
#define IPOPT_MEASUREMENT           ( 3 << IPOPT_CLASS_SHIFT )
 - 
 
223 
#define IPOPT_RESERVED2             ( 4 << IPOPT_CLASS_SHIFT )
 - 
 
224 
 
 - 
 
225 
//#define IPOPT_END_OF_LIST     0x0
 - 
 
226 
#define IPOPT_END                   IPOPT_TYPE( 0, IPOPT_CONTROL, 0 )
 - 
 
227 
//#define IPOPT_NO_OPERATION        0x1
 - 
 
228 
#define IPOPT_NOOP                  IPOPT_TYPE( 0, IPOPT_CONTROL, 1 )
 - 
 
229 
//#define IPOPT_SECURITY            0x82
 - 
 
230 
#define IPOPT_SEC                   IPOPT_TYPE( IPOPT_COPY, IPOPT_CONTROL, 2 )
 - 
 
231 
#define IPOPT_SEC_LENGTH            11
 - 
 
232 
#define IPOPT_SEC_UNCLASIFIED       0x0
 - 
 
233 
#define IPOPT_SEC_CONFIDENTIAL      0xF035
 - 
 
234 
#define IPOPT_SEC_EFTO              0x789A
 - 
 
235 
#define IPOPT_SEC_MMMM              0xBC4D
 - 
 
236 
#define IPOPT_SEC_PROG              0x5E26
 - 
 
237 
#define IPOPT_SEC_RESTRICTED        0xAF13
 - 
 
238 
#define IPOPT_SEC_SECRET            0xD788
 - 
 
239 
#define IPOPT_SEC_TOP_SECRET        0x6BC5
 - 
 
240 
//#define IPOPT_LOOSE_SOURCE        0x83
 - 
 
241 
#define IPOPT_LSRR                  IPOPT_TYPE( IPOPT_COPY, IPOPT_CONTROL, 3 )
 - 
 
242 
//#define IPOPT_STRICT_SOURCE       0x89
 - 
 
243 
#define IPOPT_SSRR                  IPOPT_TYPE( IPOPT_COPY, IPOPT_CONTROL, 9 )
 - 
 
244 
//#define IPOPT_RECORD_ROUTE        0x07
 - 
 
245 
#define IPOPT_RR                    IPOPT_TYPE( IPOPT_COPY, IPOPT_CONTROL, 7 )
 - 
 
246 
//#define IPOPT_STREAM_IDENTIFIER   0x88
 - 
 
247 
#define IPOPT_SID                   IPOPT_TYPE( IPOPT_COPY, IPOPT_CONTROL, 8 )
 - 
 
248 
#define IPOPT_SID_LENGTH            4
 - 
 
249 
//#define IPOPT_INTERNET_TIMESTAMP  0x44
 - 
 
250 
#define IPOPT_TIMESTAMP             IPOPT_TYPE( IPOPT_COPY, IPOPT_MEASUREMENT, 4 )
 - 
 
251 
#define IPOPT_CIPSO                 IPOPT_TYPE( IPOPT_COPY, IPOPT_CONTROL, 5 )
 - 
 
252 
 
 - 
 
253 
#define IPVERSION   4
 - 
 
254 
#define MAXTTL      255
 - 
 
255 
#define IPDEFTTL    64
 - 
 
256 
 
 177 
/*
257 
#define IPOPT_OPTVAL 0
 178 
#define IPOPT_OPTVAL 0
258 
#define IPOPT_OLEN   1
 179 
#define IPOPT_OLEN   1
259 
#define IPOPT_OFFSET 2
 180 
#define IPOPT_OFFSET 2
260 
#define IPOPT_MINOFF 4
 181 
#define IPOPT_MINOFF 4
261 
#define MAX_IPOPTLEN 40
 182 
#define MAX_IPOPTLEN 40
262 
#define IPOPT_NOP IPOPT_NOOP
 - 
 
263 
#define IPOPT_EOL IPOPT_END
 - 
 
264 
#define IPOPT_TS  IPOPT_TIMESTAMP
 - 
 
265 
 
 183 
*/
266 
#define IPOPT_TS_TSONLY     0       /* timestamps only */
 - 
 
267 
#define IPOPT_TS_TSANDADDR  1       /* timestamps and addresses */
 - 
 
268 
#define IPOPT_TS_PRESPEC    3       /* specified modules only */
 - 
 
269 
 
 184 
 
270 
#endif
 185 
#endif
271 
 
 186 
 
272 
/** @}
 187 
/** @}
273 
 */
 188 
 */