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 *  as published by the Free Software Foundation; either version 2 of the

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 *  License, or (at your option) any later version.

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 *  The right to use EtherCAT Technology is granted and comes free of

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 *  charge under condition of compatibility of product made by

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 *  Licensee. People intending to distribute/sell products based on the

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 *  code, have to sign an agreement to guarantee that products using

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 *  software based on IgH EtherCAT master stay compatible with the actual

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 *  EtherCAT specification (which are released themselves as an open

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 *  standard) as the (only) precondition to have the right to use EtherCAT

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 *  Technology, IP and trade marks.

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 *

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#include <linux/netdevice.h>

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   Queued frame structure.

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typedef struct

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    struct list_head queue; /**< list item */

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    struct sk_buff *skb; /**< socket buffer */

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ec_eoe_frame_t;

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typedef struct ec_eoe ec_eoe_t;

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   Ethernet-over-EtherCAT (EoE) handler.

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struct ec_eoe

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    void (*state)(ec_eoe_t *); /**< state function for the state machine */

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    struct net_device *dev; /**< net_device for virtual ethernet device */

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    struct net_device_stats stats; /**< device statistics */

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    unsigned int opened; /**< net_device is opened */

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    struct sk_buff *rx_skb; /**< current rx socket buffer */

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    off_t rx_skb_offset; /**< current write pointer in the socket buffer */

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    size_t rx_skb_size; /**< size of the allocated socket buffer memory */

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    uint8_t rx_expected_fragment; /**< next expected fragment number */

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    struct list_head tx_queue; /**< queue for frames to send */

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    unsigned int tx_queue_active; /**< kernel netif queue started */

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    unsigned int tx_queued_frames; /**< number of frames in the queue */

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    spinlock_t tx_queue_lock; /**< spinlock for the send queue */

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    ec_eoe_frame_t *tx_frame; /**< current TX frame */

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    uint8_t tx_frame_number; /**< number of the transmitted frame */

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    uint8_t tx_fragment_number; /**< number of the fragment */

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    size_t tx_offset; /**< number of octets sent */

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};

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int ec_eoe_init(ec_eoe_t *);

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unsigned int ec_eoe_active(const ec_eoe_t *);