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  • uspace/srv/net/nil/eth/eth.h

    r4eca056 rfe8dfa6  
    4444#include <adt/measured_strings.h>
    4545
     46/** Ethernet address length. */
     47#define ETH_ADDR  6
     48
     49/** Ethernet header preamble value. */
     50#define ETH_PREAMBLE  0x55
     51
     52/** Ethernet header start of frame value. */
     53#define ETH_SFD  0xD5
     54
     55/** IEEE 802.2 unordered information control field. */
     56#define IEEE_8023_2_UI  0x03
     57
     58/** Type definition of the Ethernet header IEEE 802.3 + 802.2 + SNAP extensions.
     59 * @see eth_header_snap
     60 */
     61typedef struct eth_header_snap eth_header_snap_t;
     62
     63/** Type definition of the Ethernet header IEEE 802.3 + 802.2 + SNAP extensions.
     64 * @see eth_header_lsap
     65 */
     66typedef struct eth_header_lsap eth_header_lsap_t;
     67
     68/** Type definition of the Ethernet header LSAP extension.
     69 * @see eth_ieee_lsap
     70 */
     71typedef struct eth_ieee_lsap eth_ieee_lsap_t;
     72
     73/** Type definition of the Ethernet header SNAP extension.
     74 * @see eth_snap
     75 */
     76typedef struct eth_snap eth_snap_t;
     77
     78/** Type definition of the Ethernet header preamble.
     79 * @see preamble
     80 */
     81typedef struct eth_preamble eth_preamble_t;
     82
     83/** Type definition of the Ethernet header.
     84 * @see eth_header
     85 */
     86typedef struct eth_header eth_header_t;
     87
     88/** Ethernet header Link Service Access Point extension. */
     89struct eth_ieee_lsap {
     90        /**
     91         * Destination Service Access Point identifier.
     92         * The possible values are assigned by an IEEE committee.
     93         */
     94        uint8_t dsap;
     95       
     96        /**
     97         * Source Service Access Point identifier.
     98         * The possible values are assigned by an IEEE committee.
     99         */
     100        uint8_t ssap;
     101       
     102        /**
     103         * Control parameter.
     104         * The possible values are assigned by an IEEE committee.
     105         */
     106        uint8_t ctrl;
     107} __attribute__ ((packed));
     108
     109/** Ethernet header SNAP extension. */
     110struct eth_snap {
     111        /** Protocol identifier or organization code. */
     112        uint8_t protocol[3];
     113       
     114        /**
     115         * Ethernet protocol identifier in the network byte order (big endian).
     116         * @see ethernet_protocols.h
     117         */
     118        uint16_t ethertype;
     119} __attribute__ ((packed));
     120
     121/** Ethernet header preamble.
     122 *
     123 * Used for dummy devices.
     124 */
     125struct eth_preamble {
     126        /**
     127         * Controlling preamble used for the frame transmission synchronization.
     128         * All should be set to ETH_PREAMBLE.
     129         */
     130        uint8_t preamble[7];
     131       
     132        /**
     133         * Start of Frame Delimiter used for the frame transmission
     134         * synchronization.
     135         * Should be set to ETH_SFD.
     136         */
     137        uint8_t sfd;
     138} __attribute__ ((packed));
     139
     140/** Ethernet header. */
     141struct eth_header {
     142        /** Destination host Ethernet address (MAC address). */
     143        uint8_t destination_address[ETH_ADDR];
     144        /** Source host Ethernet address (MAC address). */
     145        uint8_t source_address[ETH_ADDR];
     146       
     147        /**
     148         * Ethernet protocol identifier in the network byte order (big endian).
     149         * @see ethernet_protocols.h
     150         */
     151        uint16_t ethertype;
     152} __attribute__ ((packed));
     153
     154/** Ethernet header IEEE 802.3 + 802.2 extension. */
     155struct eth_header_lsap {
     156        /** Ethernet header. */
     157        eth_header_t header;
     158       
     159        /**
     160         * LSAP extension.
     161         * If DSAP and SSAP are set to ETH_LSAP_SNAP the SNAP extension is being
     162         * used.
     163         * If DSAP and SSAP fields are equal to ETH_RAW the raw Ethernet packet
     164         * without any extensions is being used and the frame content starts
     165         * rigth after the two fields.
     166         */
     167        eth_ieee_lsap_t lsap;
     168} __attribute__ ((packed));
     169
     170/** Ethernet header IEEE 802.3 + 802.2 + SNAP extensions. */
     171struct eth_header_snap {
     172        /** Ethernet header. */
     173        eth_header_t header;
     174       
     175        /**
     176         * LSAP extension.
     177         * If DSAP and SSAP are set to ETH_LSAP_SNAP the SNAP extension is being
     178         * used.
     179         * If DSAP and SSAP fields are equal to ETH_RAW the raw Ethernet packet
     180         * without any extensions is being used and the frame content starts
     181         * rigth after the two fields.
     182         */
     183        eth_ieee_lsap_t lsap;
     184       
     185        /** SNAP extension. */
     186        eth_snap_t snap;
     187} __attribute__ ((packed));
     188
     189/** Ethernet Frame Check Sequence. */
     190typedef uint32_t eth_fcs_t;
     191
    46192/** Type definition of the Ethernet global data.
    47193 * @see eth_globals
    … …  
    91237        /** Actual device hardware address. */
    92238        measured_string_t *addr;
     239       
    93240        /** Actual device hardware address data. */
    94         char *addr_data;
     241        uint8_t *addr_data;
    95242};
    96243
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