Changeset a64c64d in mainline for uspace/srv/net/il/ip/ip_header.h


Ignore:
Timestamp:
2010-03-09T22:24:31Z (14 years ago)
Author:
Lukas Mejdrech <lukasmejdrech@…>
Branches:
lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export
Children:
74520daf
Parents:
9f2ea28
Message:
  • code reorganization (no functional change)
File:
1 edited

Legend:

Unmodified
Added
Removed

  • uspace/srv/net/il/ip/ip_header.h

    r9f2ea28 ra64c64d  
    4242#include <sys/types.h>
    4343
    44 /** Returns the actual IP header length in bytes.
    45  *  @param[in] header The IP packet header.
    46  */
    47 #define IP_HEADER_LENGTH(header)                ((header)->header_length * 4u)
     44/** Returns the fragment offest high bits.
     45 *  @param[in] length The prefixed data total length.
     46 */
     47#define IP_COMPUTE_FRAGMENT_OFFSET_HIGH(length) ((((length) / 8u) &0x1F00) >> 8)
     48
     49/** Returns the fragment offest low bits.
     50 *  @param[in] length The prefixed data total length.
     51 */
     52#define IP_COMPUTE_FRAGMENT_OFFSET_LOW(length) (((length) / 8u) &0xFF)
    4853
    4954/** Returns the IP header length.
    … …  
    5257#define IP_COMPUTE_HEADER_LENGTH(length)                ((uint8_t) ((length) / 4u))
    5358
     59/** Returns the fragment offest.
     60 *  @param[in] header The IP packet header.
     61 */
     62#define IP_FRAGMENT_OFFSET(header) ((((header)->fragment_offset_high << 8) + (header)->fragment_offset_low) * 8u)
     63
     64/** Returns the IP packet header checksum.
     65 *  @param[in] header The IP packet header.
     66 */
     67#define IP_HEADER_CHECKSUM(header)      (htons(ip_checksum((uint8_t *)(header), IP_HEADER_LENGTH(header))))
     68
     69/** Returns the actual IP packet data length.
     70 *  @param[in] header The IP packet header.
     71 */
     72#define IP_HEADER_DATA_LENGTH(header)   (IP_TOTAL_LENGTH(header) - IP_HEADER_LENGTH(header))
     73
     74/** Returns the actual IP header length in bytes.
     75 *  @param[in] header The IP packet header.
     76 */
     77#define IP_HEADER_LENGTH(header)                ((header)->header_length * 4u)
     78
    5479/** Returns the actual IP packet total length.
    5580 *  @param[in] header The IP packet header.
    … …  
    5782#define IP_TOTAL_LENGTH(header)         ntohs((header)->total_length)
    5883
    59 /** Returns the actual IP packet data length.
    60  *  @param[in] header The IP packet header.
    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[in] header The IP packet header.
    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[in] header The IP packet header.
    71  */
    72 #define IP_FRAGMENT_OFFSET(header) ((((header)->fragment_offset_high << 8) + (header)->fragment_offset_low) * 8u)
    73 
    74 /** Returns the fragment offest high bits.
    75  *  @param[in] length The prefixed data total length.
    76  */
    77 #define IP_COMPUTE_FRAGMENT_OFFSET_HIGH(length) ((((length) / 8u) &0x1F00) >> 8)
    78 
    79 /** Returns the fragment offest low bits.
    80  *  @param[in] length The prefixed data total length.
    81  */
    82 #define IP_COMPUTE_FRAGMENT_OFFSET_LOW(length) (((length) / 8u) &0xFF)
     84/** @name IP flags definitions
     85 */
     86/*@{*/
     87
     88/** Fragment flag field shift.
     89 */
     90#define IPFLAG_FRAGMENT_SHIFT           1
     91
     92/** Fragmented flag field shift.
     93 */
     94#define IPFLAG_FRAGMENTED_SHIFT         0
     95
     96/** Don't fragment flag value.
     97 *  Permits the packet fragmentation.
     98 */
     99#define IPFLAG_DONT_FRAGMENT            (0x1 << IPFLAG_FRAGMENT_SHIFT)
     100
     101/** Last fragment flag value.
     102 *  Indicates the last packet fragment.
     103 */
     104#define IPFLAG_LAST_FRAGMENT            (0x0 << IPFLAG_FRAGMENTED_SHIFT)
     105
     106/** May fragment flag value.
     107 *  Allows the packet fragmentation.
     108 */
     109#define IPFLAG_MAY_FRAGMENT                     (0x0 << IPFLAG_FRAGMENT_SHIFT)
     110
     111/** More fragments flag value.
     112 *  Indicates that more packet fragments follow.
     113 */
     114#define IPFLAG_MORE_FRAGMENTS           (0x1 << IPFLAG_FRAGMENTED_SHIFT)
     115
     116/*@}*/
    83117
    84118/** Type definition of the internet header.
    … …  
    91125 */
    92126typedef ip_header_t *           ip_header_ref;
     127
     128/** Type definition of the internet option header.
     129 *  @see ip_header
     130 */
     131typedef struct ip_option        ip_option_t;
     132
     133/** Type definition of the internet option header pointer.
     134 *  @see ip_header
     135 */
     136typedef ip_option_t *           ip_option_ref;
     137
     138/** Type definition of the internet version 4 pseudo header.
     139 *  @see ipv4_pseudo_header
     140 */
     141typedef struct ipv4_pseudo_header       ipv4_pseudo_header_t;
     142
     143/** Type definition of the internet version 4 pseudo header pointer.
     144 *  @see ipv4_pseudo_header
     145 */
     146typedef ipv4_pseudo_header_t *          ipv4_pseudo_header_ref;
    93147
    94148/** Internet header.
    … …  
    171225} __attribute__ ((packed));
    172226
    173 /** Type definition of the internet option header.
    174  *  @see ip_header
    175  */
    176 typedef struct ip_option        ip_option_t;
    177 
    178 /** Type definition of the internet option header pointer.
    179  *  @see ip_header
    180  */
    181 typedef ip_option_t *           ip_option_ref;
    182 
    183227/** Internet option header.
    184228 *  Only type field is always valid.
    … …  
    212256} __attribute__ ((packed));
    213257
    214 /** @name IP flags definitions
    215  */
    216 /*@{*/
    217 
    218 /** Fragment flag field shift.
    219  */
    220 #define IPFLAG_FRAGMENT_SHIFT           1
    221 
    222 /** Fragmented flag field shift.
    223  */
    224 #define IPFLAG_FRAGMENTED_SHIFT         0
    225 
    226 /** May fragment flag value.
    227  *  Allows the packet fragmentation.
    228  */
    229 #define IPFLAG_MAY_FRAGMENT                     (0x0 << IPFLAG_FRAGMENT_SHIFT)
    230 
    231 /** Don't fragment flag value.
    232  *  Permits the packet fragmentation.
    233  */
    234 #define IPFLAG_DONT_FRAGMENT            (0x1 << IPFLAG_FRAGMENT_SHIFT)
    235 
    236 /** Last fragment flag value.
    237  *  Indicates the last packet fragment.
    238  */
    239 #define IPFLAG_LAST_FRAGMENT            (0x0 << IPFLAG_FRAGMENTED_SHIFT)
    240 
    241 /** More fragments flag value.
    242  *  Indicates that more packet fragments follow.
    243  */
    244 #define IPFLAG_MORE_FRAGMENTS           (0x1 << IPFLAG_FRAGMENTED_SHIFT)
    245 
    246 /*@}*/
    247 
    248 /** Type definition of the internet version 4 pseudo header.
    249  *  @see ipv4_pseudo_header
    250  */
    251 typedef struct ipv4_pseudo_header       ipv4_pseudo_header_t;
    252 
    253 /** Type definition of the internet version 4 pseudo header pointer.
    254  *  @see ipv4_pseudo_header
    255  */
    256 typedef ipv4_pseudo_header_t *          ipv4_pseudo_header_ref;
    257 
    258258/** Internet version 4 pseudo header.
    259259 */
Note: See TracChangeset for help on using the changeset viewer.