Subversion Repositories HelenOS

Rev

Rev 4243 | Rev 4704 | Go to most recent revision | Show entire file | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed

Rev 4243 Rev 4350
Line 108... Line 108...
108 
     */
 108 
     */
109 
    uint8_t     ttl;
 109 
    uint8_t     ttl;
110 
    /** This field indicates the next level protocol used in the data portion of the internet datagram.
 110 
    /** This field indicates the next level protocol used in the data portion of the internet datagram.
111 
     */
 111 
     */
112 
    uint8_t     protocol;
 112 
    uint8_t     protocol;
113 
    /** A checksum on the header only.
 113 
    /** A checksum of the header only.
114 
     *  Since some header fields change (e.g., time to live), this is recomputed and verified at each point that the internet header is processed.
 114 
     *  Since some header fields change (e.g., time to live), this is recomputed and verified at each point that the internet header is processed.
115 
     *  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.
 115 
     *  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.
116 
     *  For purposes of computing the checksum, the value of the checksum field is zero.
 116 
     *  For purposes of computing the checksum, the value of the checksum field is zero.
117 
     */
 117 
     */
118 
    uint16_t    header_checksum;
 118 
    uint16_t    header_checksum;
Line 122... Line 122...
122 
    /** The destination address.
 122 
    /** The destination address.
123 
     */
 123 
     */
124 
    uint32_t    destination_address;
 124 
    uint32_t    destination_address;
125 
} __attribute__ ((packed));
 125 
} __attribute__ ((packed));
126 
 
 126 
 
- 
 
 127 
/** Type definition of the internet option header.
- 
 
 128 
 *  @see ip_header
- 
 
 129 
 */
127 
typedef struct ip_option    ip_option_t;
 130 
typedef struct ip_option    ip_option_t;
- 
 
 131 
 
- 
 
 132 
/** Type definition of the internet option header pointer.
- 
 
 133 
 *  @see ip_header
- 
 
 134 
 */
128 
typedef ip_option *     ip_option_ref;
 135 
typedef ip_option *     ip_option_ref;
129 
 
 136 
 
130 
/** Internet option header.
 137 
/** Internet option header.
131 
 *  Only type field is always valid.
 138 
 *  Only type field is always valid.
132 
 *  Other fields' validity depends on the option type.
 139 
 *  Other fields' validity depends on the option type.